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content August/September Issue

The Magazine of Solid-State Lighting

page 6

2009

Journal

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page 13

FEATURES

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Case Study: A Spectacular Display of Light, Sound and Movement. . . . .17 Standardization for LEDs and Solid State Lighting . . . . . . . . . . . . . . . .19 Innovative Power Reduction Techniques Enable Handset Manufacturers To Provide Media Rich Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32 OLED Display Technology Capabilities. . . . . . . . . . . . . . . . . . . . . . . . . .34 Integrating Power, Control Offers Flexibility and Simplicity for Lighting Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

LEDS The New Class of Light with OSRAM OSLON SSL LED . . . . . . . . . . . . . .4 The new ultra-white OSLON SSL LED from Osram Opto Semiconductors may be small in size at 3 mm by 3 mm, but it’s big on performance. Using the latest chip technology, the 1 W OSLON SSL LED achieves a brightness and luminous efficiency of 100 lm/W.

ARRAYS, MODULES & COMPONENTS

page 17

On the cover:

National Semiconductor Introduces High-Side Dual LED Flash Driver. . .8 National Semiconductor Corp. has introduced a high-side LED driver that enables dual LED operation for the camera flash function in portable, battery-powered multimedia devices. The LM3554 drives one or two high-current LEDs for flash applications in handheld devices such as mobile phones, smartphones and portable scanners.

MATERIALS, TESTING & MANUFACTURING LED Technology Relies on Polycarbonate from Bayer MaterialScience. . 13 Borealis Lighting’s patented PolyBrite polymer and light transmitting technology is a unique polymer/LED combination that conducts, angles and radiates a light source through the polymer lens material illuminated by LEDs.

APPLICATIONS & INTEGRATIONS

Case Study: A Spectacular Display of Light, Sound and Movement

W2 Architectural Lighting Introduces VAMP LED Track Fixtures . . . . .15 W2 Architectural Lighting has introduced VAMP LED Spotlights, a new series of track fixtures developed specifically for the specification market. W2 Architectural Lighting, a division of WAC Lighting, is a manufacturer and designer of specification grade products for the architectural markets.

DEPARTMENTS page 17

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2009 Annual Resource Guide. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Industry News. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Calendar of Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Ad Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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LEDs The New Class of Light with OSRAM OSLON SSL LED The new ultra-white OSLON SSL LED from Osram Opto Semiconductors uses the latest chip technology to achieve a brightness and luminous efficiency of 100 lm/W. The OSLON SSL LED meets the required standard for general lighting usage and is reliably efficient, even at high currents. Because of its beam angle of 80°, it is well suited for injecting light into external lenses. The OSLON SSL LED is well suited for spotlights, desk lights and ceiling floodlights. “Its ability to handle high currents efficiently enables our customers to create energy-efficient and cost-saving lighting solutions,” said Brian Terao, Director of SSL at Osram Opto Semiconductors, Inc. “The OSLON SSL LED has all the attributes to become the ‘green’ light source of the future.” The OSLON SSL LED has a low thermal resistance of 7K/W, which simplifies thermal management. Its compact size gives designers the flexibility to create extremely sophisticated solutions. In designs where more light is needed, several OSLON SSL LEDs can be combined to form a cluster. In addition to ultrawhite (5,700 K to 6,500 K), the LED will be available this summer in neutral white and warm white with a color temperature ranging from 2,700 K to 4,500 K. Manufactured with the latest chip technology, the OSLON SSL LED has an operating current of 350 mA, which enables the light source to achieve a typical brightness of 110 lm in ultra-white (5,700 K and 6,500 K), and a maximum possible luminous flux of 130 lm at present. At an operating current of 350 mA and a color temperature of 3,000 K, the OSLON SSL LED can achieve efficiency of 75 lm/W and a brightness of 85 lm. Additionally, brightness is 155 lm at an operating current of 700 mA (warm white). At these performance levels, the OSLON SSL LED can meet the demand for high-lighting levels using fewer LEDs with currents up to 1 A.

Cree Introduces IPx5-Rated Tri-Color LED for Full-Color Displays Cree, Inc. has released the first commercially available water-resistant, surface-mount, high-brightness LEDs for outdoor video screens. This RGB LED has an IPx5 rating, indicating that the LED is protected against low-pressure jets of water from all directions. “We’ve developed a water-resistant, red-green-blue LED that can be used in indoor and outdoor video screen applications,” said Paul Thieken, Cree director of Marketing, LED components. “Previously, LEDs had to be encapsulated to protect them from water. By incorporating encapsulation at the LED level, we can help our customers save time and money.” “Displ’aire, working with Cree, is changing the rules for LED displays,” says Leo Stearns, Displ’aire’s CEO. “Cree’s involvement started with us early in our development cycle, and they provided the support we needed to rapidly deploy our new technologies. Displ’aire portable, daylight-visible displays and the new water-resistant Cree LEDs are a perfect technology match for creating brighter, more efficient displays that can better stand up to the elements.” The ScreenMaster CLV6A-FKB features a black face for improved contrast in full-color video screens, decorative lighting and amusement applications. It has a unique encapsulation resin with UV-inhibitors, minimizing the effects of long-term exposure to direct sunlight which helps to improve the stability of the light-output over the life of the LED. It also features a unique matched horizontal radiation patternenhancing color mixing and pixel-to-pixel color consistency.

Luminus Introduces CSM-360 White PhlatLight LED for High-Output Lighting Applications Luminus Devices, Inc. has introduced the CSM-360-W PhlatLight LED, the newest in a series of white LEDs designed specifically for general lighting applications. The CSM-360-W combines the benefits of large monolithic chips in a multi-chip configuration to deliver a Chip-on-Board LED package capable of delivering 6,000 lumens. This new class of LEDs enables a variety of lighting applications not previously possible with traditional LEDs, and as a result fixture manufacturers are now able to target 10,000 lumens and higher applications with as few as two PhlatLight LED packages.

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Journal The Magazine of Solid-State Lighting

Volume 4, Issue 4 Editor & Publisher David Webster Director of Content Shannon M. Given Associate Editor Nick Depperschmidt Assistant Editors Heather Krier, Joanna Larez News Editors Jessi Albers, Sue Hannebrink, Jeremy Fleming, Laura Mayo Director of Support Services/Circulation Marc Vang Databases/Directories Ross Webster Advertising Sales and Marketing Laura Mayo, Account Executive Jennifer Graham, Marketing Assistant Production Manager Julie Hammond Administration Marsha Grillo, Director Julie Williams, Office Manager

LED Journal (ISSN #1930-7772) is a publication of Webcom Communications Corp. Subscriptions for one year are free for the qualified US, $44.00 non-qualified US and $60.00 outside US. Single copies are $20 each plus shipping. Back issues are available. Payment must be made in US funds in order to process the order. Direct all subscription inquiries, orders and address changes to Fulfillment Services. Photocopy Rights: Permission to photocopy for internal or personal use, or the internal or personal use of specific clients is granted by LED Journal for users through Copyright Clearance Center, provided that the base fee of $2.50 per copy of the article, plus $1.00 per page is paid directly to the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923 USA (508) 750-8400. For government and/or classroom use, the Copyright Clearance Center should be contacted. The rate for this is 3 cents per page. Please specify ISSN #1930-7772 LED Journal. Reprints: For reprint requests contact The YGS Group at 1808 Colonial Village Lane, Lancaster, Pa., 17601 USA (717) 399-1900. © Copyright 2009 Webcom Communications Corp. Material in this publication may not be reproduced in any form without written permission. Requests for permission should be directed to the customer service manager.

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LEDs “The CSM-360-W has a lumen output range that provides industry-leading efficiency and delivers a new level of performance not previously realized in a single LED package,” said Chad Stalker, director of Product Marketing and Business Development for the Lighting Business Group at Luminus Devices. “In addition to the PhlatLight LED benefits of simplified fixture design with fewer LEDs and corresponding optics and drivers, the CSM-360-W also provides a package platform making it possible to service and upgrade the LED itself instead of replacing the whole fixture.” The CSM-360-W is unique in several ways. It consists of four separate monolithic chips, each with a light-emitting surface of nine square millimeters in size, closely packed in a single Chip-on-Board package. The CSM-360-W produces more than 3,600 lumens at high efficacy and more than 6,000 lumens at high output. PhlatLight LEDs are mercury-free, highly reliable and provide a lifetime of 60,000 hours with lumen maintenance of greater than 70 percent.

Seoul Semiconductor Launches Commercial Sales of New 120 lm/W Patented Product for Lighting Seoul Semiconductor has launched its 120 lm/W high-efficiency, SMD type LED for general purpose lighting. Unlike existing Chip LED devices, the LCW100Z1 delivers more than 120 lm/W with an enhanced primary optic. Also, combined with the metal substrate, luminous efficiency is improved substantially compared to the typical Top View LED. Enhanced heat transfer dramatically improves efficiency. The patented LCW100Z1 shows remarkable value with pricing comparable to similar-sized Chip LED’s that can tolerate only half of the current of the LCW100Z1. As an ultra-thin LED with dimensions of 3.5 mm by 2.8 mm by 1.6 mm, the LCW100Z1 delivers up to 7.8 lm (at 0.06 W) at the low current of 20 mA, and 14.3 lm 40 mA with a viewing angle of 120° in cool white. Another strength of the LCW100Z1 is that its reliability is improved by the optimized thermal design yielding the efficiency needed for indoor and outdoor lighting. The new LCW100Z1 product comes in three ranges of correlated color temperature’s (CCT) including pure white, warm white and natural white. Samples of the LCW100Z1 were already received favorably by leading lighting appliance manufacturers around the world. As it can immediately replace the existing Top View LED, the LCW100Z1 is expected to be widely adopted for tube-type fluorescent lamps and surface light source lamps. The LCW100Z1 is also anticipated to serve as a catalyst for expanding the LED lighting market as it allows lighting manufacturers to produce a variety of lighting devices. In some instances using fewer, higher power devices has proven too costly and not provided a homogeneous light pattern without an expensive and complex optic.

6 LED Journal | August/September 2009

QuasarBrite Narrow Beam SMT LEDs Provide Decrease in Light Angle for High-Intensity Applications Lumex has launched its QuasarBrite Narrow Beam SMT LEDs providing users with a tight beam of high-intensity red, green or blue light. Compared to traditional SMT LEDs, these Narrow Beam SMT LEDs allow for a 93 percent reduction in beam angle, making the technology well suited for medical device, security, sensor and visible lighting applications that require concentrated, high-intensity light. “Despite their many advantages, SMT LEDs traditionally could not provide a narrow beam of light without the use of external optics,” said Jeff Oliveros, director of Engineering, at Lumex. “Thanks to QuasarBrite Narrow Beam SMT LEDs, this is no longer the case. Whereas traditional SMT LEDs offered a light beam of ±45 to ±85 degrees, QuasarBrite Narrow Beam SMT LEDs provide a light beam of ±6 to ±10 degrees, up to a 93 percent reduction in beam angle.” With QuasarBrite Narrow Beam SMT LEDs, the LED is mounted upside down and shines directly into an internal parabolic reflector providing highintensity brightness in a narrow beam of light without the need for external optics. As such, QuasarBrite Narrow Beam SMT LEDs can provide a 50 percent cost savings and 50 percent real estate savings when compared to traditional SMT LEDs that rely on external optics to achieve a tight beam of light. The elimination of the need for external optics also significantly simplifies manufacturing processes, resulting in additional cost savings. The internal parabolic reflector also collimates the light into a beam, allowing high-intensity light to be produced by a standard LED with standard energy consumption of 75 mW or less. A typical SMT may have a brightness of 1 cd with a view angle of ±45 degrees. QuasarBrite Narrow Beam SMT LEDs provide an intensity up to 100 cd at a view angle of ±6 degrees. The RoHs compliant QuasarBrite Narrow Beam SMT LEDs are available in the following sizes: 4 mm (provides beam angle of 12° to 22°); 6 mm (provides beam angles of 14° to 24°); and 8 mm (provides beam angle of 14° to 18°). Samples of these devices are available from stock, with custom production quantities in eight to 10 weeks and standard production quantities in eight to 10 weeks. Pricing is dependent on quantity ordered, and is approximately $1.70 to $7.20 per unit in production quantities dependent on size, color and quantity ordered.

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arrays, modules & components National Semiconductor Introduces High-Side Dual LED Flash Driver National Semiconductor Corp. has introduced a high-side LED driver that enables dual LED operation for the camera flash function in portable, battery-powered multimedia devices. The LM3554, a member of National’s PowerWise energy-efficient product family, drives one or two high-current LEDs for flash applications in handheld devices such as mobile phones, smartphones and portable scanners. Traditional LED flash drivers sink current from a single high-current LED back into the driver resulting in significant heat dissipation into the driver IC and reduced system reliability. The LM3554’s dual LED, high-side current-drive architecture sources regulate current into two LEDs with cathodes connected directly to the ground. This ground connection provides more effective thermal dissipation while minimizing routing complexity and protecting sensitive circuitry. Due to nonlinearity of LED light output versus LED current, the dual LED architecture consumes less power for the same light output as a single LED. In addition, monitoring pins enable detection of other high current demands in the system, adaptively throttling the LED current to avoid drawing excessive battery current, which can cause faults or harm the system. The LM3554 is offered in a 16-pin micro SMD package. A complete boost converter solution for LED flash using National’s LM3554 measures less than 23 mm2. National’s LM3554 flash LED driver is a fixed-frequency, step-up DCDC converter with two regulated current sources capable of driving loads up to 1.2 A from a single-cell Li-Ion battery. The LM3554 drives the LEDs in a high-power flash mode for still photography or a low-power torch mode for video recording. To configure the driver, designers can adjust the flash current levels and timer durations via an I2C compatible interface. The LM3554 features built-in time-out protection to protect the flash LEDs in case of a fault condition. National’s LM3554 features an adjustable switch current limit for the use of small inductors with low saturation currents. The voltage mode offers a 5 V rail, which can be used for backlight LEDs and audio amplifier supplies. One or more high-current LEDs can be driven either in a high-power flash mode or a lower-power torch mode controlled by either an internal register or the strobe and TX pins. A GPIO pin adds a separate hardware control resource to the system. The hardware reset pin offers full control over the device in the case of I2C communication failure. Additional features include internal soft-start to eliminate large in-rush currents during start-up and fast switching frequency, allowing for the use of small external components. National’s LM3554 is priced at $2.32 in 1,000-unit quantities.

Illumra LED Dimmers Provide Ultra Smooth Wireless Dimming Illumra Self-powered Wireless Controls has introduced the 65,000 dim step 24 VDC wireless LED dimmer along with its new wireless 0 to 10 V dimmer. The new wireless devices provide smooth LED dimming at all light levels. The wireless dimmers provide users the ability to adjust light levels to their preferences and allow the use of energy saving LED lights with the convenience of quality dimming control. The Illumra wireless 24 VDC LED dimmer eliminates the issue of choppiness at low dim levels. Through the use of thousands of PWM dim-

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ming steps, the Illumra LED Dimmer creates what is perceived by the natural eye as a single continuous dim, even at low light levels. The dimmer can drive 12 V or 24 V LED fixtures and loads requiring up to 5 amps of current. The dimmer can be controlled from any switch wired to its local control input, in addition to Illumra battery-free, wireless light switches. The 0 to 10 V dimmer is used to control dimmable LED power supplies or dimmable fluorescent ballasts. In addition to its industry-standard 0 to 10 V output, the dimmer conveniently provides a fully isolated switch output driver. The driver can be used to control an external relay, contactor or power-pack, completely disconnecting the load when it's not in use, thereby achieving maximum energy savings. The wireless capability of the new Illumra dimmers allow users to control or dim lights using self-powered wireless light sensors, wireless occupancy sensors, wireless light switches or other Illumra wireless transmitters. This means the dimmers are able to be used in a variety of applications such as architectural dimming, daylighting, load shedding, manual ON / automatic OFF control and more. The dimmers can dim lights in response to wireless light sensors indicating when natural light is available. They can also turn off or dim lights in vacant rooms or hallways by responding to signals from wireless motion sensors. Additionally, the dimmers can be manually controlled with self-powered wireless switches. Each dimmer has an input for a wired 24 V sensor, stores up to 30 wireless switches or sensors in its memory and may function as a repeater for use in Illumra wireless control networks. The Illumra LED dimmers are FCC/IC approved and RoHS compliant to minimize the environmental impact over the life cycle of the products.

LED Drivers Provide Up to 85 Percent Energy Savings American Ballast, a commercial and residential power solutions company, has developed a line of energy efficient LED drivers. Enabling advancements in LED lighting, the LED drivers can provide up to 85 percent energy savings in a wide range of indoor and outdoor lighting applications such as street lights, indoor down lights, ceiling lights, displays and channel lighting. Featuring Instant Start technology with parallel circuit configuration, the LED drivers are engineered to outperform other Instant Start drivers. The operating temperature range is -20ºC up to 70ºC, eliminating the concern for use in harsh or cold weather environments. The LED driver is protected for failure with over voltage and current protection. In the case where the driver does short circuit, the advanced engineering provides for auto-recovery and return to full power. Well suited for parallel and series configurations, American Ballasts’

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arrays, modules & components LED driver family is IP20 and IP66 rated for dry and wet locations. In addition, the LED driver offers enhanced design functions including the capability to create versatile lighting effects with the dimming capabilities and light distribution control for each LED built into the fixture. Each driver is 95 mm by 76 mm by 32 mm and have an AC input of 110 VAC. Operating levels range from 160 VAC to 304 VAC and have been tested to ensure a current accuracy level of 1 percent and load regulation of 3 percent. Customers are guaranteed a high-performance driver that meets EMC, FCC, RoHS and government safety standards. All American Ballast lighting solutions are UL & CuL recognized. With the development of advanced thermal technology the drivers are guaranteed to maintain a high-level of performance and long operation. American Ballast offers a three-year or 100,000 hours warranty.

ERG Offers LED Drivers for SSL Luminaires Endicott Research Group (ERG) is developing new LED driver solutions for the solid state lighting market. Leveraging technology developed for its CCFL inverters and LED backlight drivers, ERG will be introducing a family of Smart Force LED drivers that combine full-function power supplies with energy-efficient controllers for commercial, industrial, architectural and other SSL applications. ERG’s Smart Force SSL drivers will offer 1 W to 200 W unit power for driving single or multiple LED strings. Standard features include universal input (85 V to 277 V at 50 Hz or 60 Hz), power factor, correction of 0.90 or better to maximize circuit efficiency and minimize power consumption, constant current with extremely low ripple to eliminate thermal issues and visible artifacts, high efficiency (90 percent) to help luminaires meet Energy Star ratings, MTBF of more than 50,000 hours, and a three-year warranty. The drivers will be available as standard, off-the shelf product or in custom designs. ERG will maintain a full in-house engineering staff at its US headquarters to meet virtually any special application requirement.

Optek Develops White LED Assembly with High Lumen Output and Improved Thermal Resistance Providing lighting designers with a high-brightness, long lasting LED lighting solution, TT electronics Optek Technology has expanded its offering of star-shaped LED assemblies. Designated the Optimal XIV Star series, the assemblies feature multiple white LEDs with a luminous flux range up to 650 lm, while the design provides improved thermal performance by recessing its multiple die into a metal core PC board. “With the exceptional thermal resistance of just 1.8°C from junction to heatsink, the assemblies are able to operate brighter and last longer, while also minimizing the power output required,” said Alan Bennett, vice president of Sales for Optek Technology. “Due to their remarkable efficiency, the assemblies are being specified for use in applications ranging from architectural lighting to portable flashlights.” Additional applications for the Optimal XIV Star series LED assemblies include security and garden lighting, indoor and outdoor commercial lighting, light guides and MR16 lighting. Available with cool white, daylight white or warm white LEDs, the Optimal XIV Star series OV14Zxx-y LED assemblies feature multiple 1-

10 LED Journal | August/September 2009

watt chips in a recessed cavity with an optical grade 8mm diameter lens. Typical viewing angle for the LED assemblies is 120°, with a typical emitted CCT of 3,300 K, 5,400 K and 6,500 K, depending on LED specifications. Total luminous flux, depending on device, ranges from 200 lm to 650 lm, with a maximum current drive range from 700 mA to 1,400 mA, and forward voltage of 10.0 VF. Operating temperature ranges from -40°C to 85°C. Other specifications, including alternative custom lens designs, are also available. Typical pricing for the Optimal XIV Star series LED assemblies ranges from $15.45 to $28.96 in quantities of 1,000 pieces. Lead time, if stock is not available, is from six to eight weeks.

New Schott Cold Light Sources Combine Fiber Optics with LED Technology Schott has expanded its renowned direct LED illumination VisiLED and EasyLED series to include an additional product range, specially developed for use with fiber optic illumination components in the field of stereomicroscopy. The development goal was to replace the previous standard fiber optic instruments, the halogen KL200 (20 W) and KL1500 (150 W) light sources, with the KL200 LED and KL1500 LED light sources, at a comparable price level. For the first time it is now possible to combine the high level of light intensity for small areas, key to applications in microscopy and only achievable with fiber optic light guides, with the advantages of an LED light source. In comparison with the 400-hour performance of a halogen lamp, the high lifetime of 50,000 hours characteristic of LEDs and energy savings of up to 80 percent, lead to considerably lower operating costs and reduced downtimes. This makes it economically viable to replace existing halogen appliances with this new technology. As the tried-and-tested light guide interface of the halogen sources remains unchanged users can simply exchange the light sources and continue to use existing light guides. The high-performance LEDs used generate neutral white light with a color temperature of approximately 6,000 K. Daylight filters common in halogen systems are not required and the intrusive change in color temperature when dimming halogen systems also no longer arises. For users preferring the yellowish tinge of halogen lamps, an appropriate halogen filter is available in the KL1500 LED system. All instruments are supplied with wide-range power supply units and universal connector systems, meaning they can be used worldwide without restrictions.

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materials, testing & manufacturing LED Technology Relies on Polycarbonate from Bayer MaterialScience Borealis Lighting’s patented PolyBrite polymer and light transmitting technology is a unique polymer/LED combination that conducts, angles and radiates a light source through the polymer lens material illuminated by LEDs. The lenses of several lamp products from Borealis lighting for indoor and outdoor illumination are molded from Bayer MaterialScience’s Makrolon polycarbonate resin. Makrolon polycarbonate offers advanced benefits for this application. For example, it does not block as much light as other materials and the higher light transmittance allows the PolyBrite technology to use fewer LEDs. Borealis Lighting uses Makrolon 6557 polycarbonate in its R20, PAR30 and PAR38 lamps. The lamps are used in a variety of general lighting applications, including residential, commercial and retail areas. Each lamp offers an eco-friendly, energy-saving alternative to incandescent or compact fluorescent light (CFL) bulbs. The Borealis R20 LED lamps are used for ambient illumination and down lighting of common areas and work spaces, while the PAR30 and PAR38 LED lamps are used for ambient illumination and down lighting of larger spaces. The Borealis lamps that feature Makrolon polycarbonate resin all provide brightness that is comparable to incandescent lamps, but with reduced glare and improved shock and vibration resistance. The PolyBrite combination of polymer and LEDs can be either extruded into a variety of light-scattering

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shapes, or injection molded, depending on the particular application. “We are always happy to be able to provide materials ideal for applications like the Borealis Lighting LED lamps, innovative products of the future,” said Gerald DiBattista, market segment leader, IT, Electrical/Electronics Polycarbonates, Bayer MaterialScience LLC. “LED lighting technology requires a material that can withstand the heat while remaining strong, and offers high light transmittance and flame resistance. Makrolon 6557 polycarbonate offers those characteristics with the reliability and reputation of Bayer MaterialScience behind it.”

New Lithography System Provides Energy and Environmental Gains Obducat’s has released its new lithography system, the Sindre 400. The system is fully automated for high volume manufacturing of LEDs. Sindre 400 is a vital contribution to the development within CleanTech, since, because of greatly increased energy and material efficiency, it reduces the use of natural resources. “The LED lights manufactured by the Sindre 400 system will be used in products such as LCD displays, instrument panels, general lighting and cars,” said Patrik Lundström, CEO, Obducat. “In addition to lower energy consumption compared with other types of light sources, LEDs do not contain mercury or led while at the same time featuring a lifetime five times longer than today’s low energy light bulbs.”

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applications & integrations W2 Architectural Lighting Introduces VAMP LED Track Fixtures W2 Architectural Lighting has introduced VAMP LED Spotlights, a new series of track fixtures developed specifically for the specification market. W2 Architectural Lighting, a division of WAC Lighting, is a manufacturer and designer of specification grade products for the architectural markets. Each track fixture is crafted using heavy-duty, die-cast aluminum construction for an exact fit, durability and heat dissipation. The heat sink and housing design ensure that heat is efficiently transferred away from the LEDs, allowing for better thermal management. The junction box temperature is lower than the LED manufacturer-rated operating temperature, thus ensuring 50,000 life with minimal color shift and light loss. High-quality LEDs provide beams free of projected heat, infrared and ultraviolet rays and are perfect for illuminating heat or color sensitive objects. All of these features result in lower operating and maintenance costs for the end-user. Designed with a clean, architectural look, the luminaires offer smooth cylindrical forms and silicone accents and a soft grip that is safe to the touch. Each VAMP luminaire has aiming indicators and is lockable and adjustable in the field without tools, with a 350° horizontal rotation and a 90° vertical tilt for precision aiming. The track adapter is heavy-duty rated for secure connection and heavy load. The state of the art LED luminaires are offered as 9 W, 18 W and 30 W models. VAMP track heads are easily re-lamped from the front via the threaded metal ring. Its closed back eliminates light leaks while threaded captive accessory-holders accommodate up to three filter mediums including hexagon louvers, cross-blade louvers, dichroic lenses, UV, IR and UV/IR filters, as well as hoods. VAMP LED luminaires can be mounted to W2 single and two-circuit track systems and are offered in three finishes: black, white and platinum with black finishes.

vides a uniform 50 percent power reduction while maintaining critical-tosafety site lighting uniformity levels so visibility and security aren’t compromised. In addition, the Generation series LED Luminaire incorporates a unique house side/street side (2H) dimming option that allows independent operation of the house side and the street side of the distribution. This option reduces the light level on the house side of the fixture by roughly 40 percent and results in a further 50 percent savings in energy consumption when dimmed. The McGraw-Edison Generation LED series’ modular design allows for mixing of bases, cage assemblies, tops and finials to achieve over 100 different looks and styles to offer a multitude of both traditional and contemporary forms to meet evolving market needs. For HID retrofit applications, the form and function of the product remains unchanged with the implementation of the LED technology. The ease of maintenance was a leading design consideration for the Generation Series. Unique maintenance features include a twist lock assembly option offering instant access to both the lamp and base by simply twisting the top assembly out of its mating lock plate. The ballast/LED driver assembly is mounted on a removable tray with quick disconnects for ease of installation when retrofitting and maintenance.

Cooper Lighting Introduces LED Architectural Outdoor Area Luminaire Cooper Lighting has introduced the McGraw-Edison Generation LED Post Top Luminaire, an energy-saving outdoor fixture that combines aesthetics with improved photometric performance offering even and uniform illumination without pixilation. The fixture’s modular LED light engine, which is designed to deliver illumination comparable to a 100 W HID system while offering more than 50 percent in energy savings. The light engine can also be purchased separately for retrofit applications of pre-existing Generation series HID fixtures. Well suited for residential communities, office complexes, downtown streetscapes, roadways, outdoor retail applications, city parks and school campuses, the post top luminaire also features modular fixture design flexibility and maintenance ease. The Generation LED luminaire provides light output and distribution comparable to a 100 W High Pressure Sodium luminaire. Producing 5,000 lumens, the fixture provides excellent color rendering, a brilliant white color temperature and low-glare. The optical design also yields effective distribution (Type III and Type V) focusing light on the task at hand instead of producing wasteful and uncontrolled illumination. To respond to curfew compliance regulatory needs, calling for alternating site lighting luminaires to be turned off to accomplish power reduction at the close of business, the Generation Bi-level Switching (2L) option pro-

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August/September 2009 | LED Journal 15

applications & integrations

The LEDtronics PAR-30A bulb complies with RoHS, the lead-free and mercury-free directive, as well as the CE safety assurance. It is suited for use with alternative or renewable energy resources – solar and wind power. Since it produces no harmful ultraviolet or infrared rays, it reduces light pollution, and it is compatible with the international “dark skies” initiative.

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application

Case Study: A Spectacular Display of Light, Sound and Movement

feature

PAR30-Style LED Bulb Uses 9 Watts To Replace 50 to 75-Watt Halogens LEDtronics has released the latest addition to its series of high-power PAR30-style LED spotlight bulbs. The white-body, medium-beam PAR30 LED bulb is made up of five 3-watt LEDs and replaces filament-based PAR30 bulbs, combining LED technologies, standard 26 mm Edison screw-in base and light optimizing design, producing 337 lumens of vivid warmwhite light. The 25°-beam PAR30A LED bulb runs on a voltage range of 85 V to 260 VAC current, and thus can be used anywhere in the world. Other voltages like 12 VAC or DC are optionally available for qualifying customers. The rugged LEDtronics PAR30A-style lamp is a direct screw-in replacement for 50 W to 75 W PAR30 incandescent or halogen bulbs, but typically has a maximum power draw of 8.5 watts. The PAR30A LED lamp is available in 3,000 K warm white color temperature, provides about 40 lumens per watt (at 141 mA), and has a high color-rendering index of 83. Designed for customers requiring the highest levels of brightness and efficacy, the new whitebody PAR30A bulb has a wide range of applications: recess or track lighting, accent lighting, general area lighting, architectural and landscape lighting, display-case fixtures and cabinet lighting, signage spotlighting and backlighting, aerospace lighting systems, industrial OEM equipment lighting, biomedical applications, and truck-bay dock lighting.

Perpignan’s fountain is a festival for the eyes conjuring the spirit of ancient fountains that entertained and cooled city dwellers. But behind the mesmerizing visual dance of water and light lie very modern, high technology Luxeon power LEDs. With 900 separate points of light embedded in individual water jets, controlled centrally to provide routines that co-ordinate colored light, water and music, the new Perpignan city center fountains are a spectacular illustration of the novel effects made possible with the use of power LEDs. The lighting solutions for the new fountain were designed and built by Sacopa, a Spanish division of Fluidra that specializes in the development of LED lighting for aquatic applications. Using LEDs permitted Sacopa’s design team to build a huge array of bright light sources – each of the installation’s 217 water jets has a Luxeon K2 LED embedded in it. This effect is not economically viable when using conventional light sources, since the short relamping intervals of these lights would give rise to crippling replacement and maintenance costs. The effect becomes practically impossible if relamping entails draining the fountain. Sacopa expects their lighting solutions for the Perpignan fountains to last approximately 27 years assuming five hours of use a day, 365 days a year. Sacopa designed a stainless steel fixture made in the shape of a flower, which contains a tricolor LED luminaire and a water jet inside its stem. While the diffuse beam of light from incandescent sources is hard to focus, the beam from the RGB LEDs is mixed and directed by a lens integrated into the fixture with almost no light loss. Each of the fixtures, which can produce 16,000,000 colors, is connected to a DMX network controller. LED light sources are more controllable than any other light source and Sacopa’s DMX controller uses the LEDs’ ability to be blinked, dimmed, flashed, and (in tri-color configurations) color-changed to produce routines in which this vast array of water jets leaps and dances in synch to music, with flashes or washes of light turning on and off, fading and changing color in time. Behind the aesthetics of the lighting routines, however, is some very practical engineering. The metal flower housing, together with an aluminium heatsink underneath the LEDs, provides a good thermal conduction path from the LEDs. This is important because controlling the operating heat at the LEDs below a certain threshold helps to maintain a high light output and extend operating lifetime. The Luxeon K2 LEDs in Sacopa’s flowers operate at a typical junction temperature of 80°C (in air) and 70°C (when cooled by water) even though they are driven at a high 700 mA in order to produce a strong beam. Since the Luxeon K2 LEDs used in the installation have a high temperature tolerance (a maximum rating for junction temperature of 150°C in the case of the red, and 185°C for the green and blue versions), the Sacopa fixtures are comfortably inside Philips Lumileds’ recommended operating conditions. Perpignan, located on the shores of the Mediterranean Sea, can enjoy daytime unshaded temperatures of up to 50°C, but extensive product testing before installation showed that the luminaires’ performance would be unimpaired even on the hottest nights. The thermal performance of the flower fixtures and of the Luxeon K2 LEDs also enhances the efficiency of the lights: at full power, each LED consumes 3 W and each RGB luminaire consumes 11 W in total. Thus the complete installation consumes 9,900 W (maximum). Sacopa’s calculations show that a halogen-powered equivalent installation, producing the same light intensity, would consume five times as much power.

August/September 2009 | LED Journal 17

By Jianzhong Jiao, Manager of Regulations and Emerging Technologies • Osram Opto Semiconductors, Inc.

Standardization By now, most of us have seen these tiny lighting devices called LEDs. LEDs illuminate our daily lives. Where there is light, it is likely that there is, or there will be LEDs. From the cars we drive, computers we use, televisions, displays, and billboard lighting to the fixtures installed in our work places, stores, streets and our homes, LEDs are the light sources of the future. LEDs are often described as the new generation of lighting devices offering significant advantages in energy savings, long life, environmental benefits, and in some cases improving public safety. An LED is defined, per ANSI / IESNA RP-16, as “A pn junction semiconductor device that emits incoherent optical radiation when forward biased. The optical emission may be in the ultraviolet, visible or infrared wavelength regions.” This very small device that emits light is undeniably, quickly and continually expanding its penetration in the market, and in our lives. As with any new technology, LEDs are generating public and government interest with many questions to ask: are they safe and reliable? Are they environmentally friendly? What type of light do they emit? How do they compare with standard and conventional light sources? Should they be standardized? Why Do We Standardize LED Lighting?

For simplicity’s sake we can say that there are two primary types of LED light. LEDs that emit visible light are known as lighting devices. In general the lighting devices serve two purposes, “To See” and “To Be Seen.” The lighting devices that provide illumination to assist, enhance and improve our visibility, (to see) are called illuminating devices. The lighting devices that provide signal, marking or visual messages, (to be seen), are called signaling devices. Both illuminating and signaling functions can impact public safety. For example, in vehicular and transportation lightings, we need to be sure there is there sufficient light for drivers to see the road, or the signals are adequate to be seen for the drivers and pedestrians to be safe to drive and avoid accidents. The need for public safety leads to the need to standardize or regulate the lighting devices. Standardization of LED light sources started in the automotive sector and is now happening in the general illumination sector as LEDs migrate into new applications. LEDs have unique characteristics that differ from standard light sources such as incandescent, discharge, and florescent lights and there is a need to have a method by which to measure and compare the light sources. The process of standardization involves both industries and governments. Long before white LEDs became bright enough to be used as illuminating devices, red, yellow, and green LEDs were introduced in automotive interior, and later exterior lighting applications, as well as for traffic signals. Safety drove the need for standardization to ensure LEDs were used properly in automotive and traffic signal applications. Both the engineering community and the government regulatory agencies had a vested interest to be sure that LEDs were successful in these applications and hence the standards for LED lighting in these applications were established. As LEDs extended into the general illumination segment we see the same pattern emerging in regard to the development of standards. While automotive and traffic standards were developed with a focus on safety, the standards for general lighting applications are being driven by the need for guidance of design and application references. The standards will address product performance measures with regard to reliabil-

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For Light Emitting Diodes And Solid-State Lighting

ity, durability and energy savings and will give LED users a platform from which to compare the performance of standard light sources with LED light sources. Whether it is for public safety, consumers’ recognition, or market acceptability, LED lighting standardization also serves the need for reducing complexity, promoting consistency and fair competition in product design, development and application. As part of the modernization of an industry, a standardized process can improve efficiency and effectiveness. LED lighting standardization is the next step in the more widespread adoption of LEDs for the general illumination market. Who Develops LED Lighting Standards?

There are three types of organizations that are developing LED related standards in the United States. Similar initiatives are underway on an international basis. Professional Organizations

Societies

In these societies, group of professionals in the LED and lighting fields voluntarily formed committees or working groups who are developing specific standards based on their knowledge, experiences, and expertise. These committees or working groups typically include a few types of members. a) Producers – LED lighting component, subsystem and system manufactures, and material manufacturers; b) Users – the integrators, specifiers, designers and others who implement different level of LED product integrations into final applications; and c) Others – include independent testing laboratories, human factor and vision experts, federal or state government agency representatives and individuals who are knowledgeable and interested in the subject. In principle, the members in the committees or working groups (except government representatives) should only provide contributions based on their individual expertise in their own fields, rather than their affiliations or employers’ commercial or business purposes or interests. The societies that are actively involved in the LED-related standard development include Society of Automotive Engineers (SAE), Institute of Transportation Engineers (ITE), Illuminating Engineering Society North America (IESNA), and Institute of Electrical and Electronic Engineers (IEEE). Standard Organizations

Similar to professional societies, the standard organizations are nonprofit with the purpose of establishing standards that ensure public safety, product consistency, and international harmonization and cooperation. The membership in the committees or working groups in the standard organizations is similar to the professional organization, but often companies’ business interests are recognized. Underwriter Laboratory (UL) and American National Standard Institute (ANSI) are the organizations that currently develop LED lighting standards. Trade Organizations

Different from other two organizations, the members of the standard committees and working groups can only come from the companies who are the members of the trade associations. The number of representatives from companies must be balanced for the voting power in each committee. Commercialism is often part of the standard development process. National Electronics Manufactures Association (NEMA) is currently actively developing LED lighting standards.

August/September 2009 | LED Journal 19

feature In general, LED lighting standards are developed by these above organizations who are not governments, and standards should reflect the best practice and are implemented voluntarily by the industry. On the other hand, the US governments, in both federal and state or local level, often establish their corresponding regulations, rules, codes, or program specifications for LED lighting, some are based on government research, safety or energy policy. Often the government rules are mandatory especially if they relate to public safety. It has always been the industry’s best interest that the government rules are consistent with industry standards, but in reality that is not always the case. What Are LED Lighting Standards For?

Any lighting standard including the ones for LEDs, whether it is developed by a professional organization, a standard organization or a trade associate can be classified into one of the two categories, a) a testing standard; or b) a performance standard. Sometimes system architecture can be considered as a type of standard, or can be grouped into performance standard. A testing standard addresses testing methodologies, procedures, testing equipment (including software and other technologies) used for testing. Some testing standards also address recommended testing results which can be used as performance measures. A performance standard provides properties, characteristics, or other measurable that are required to perform to an acceptable level for safety, functionalities, reliability and other needs. Performance standards often also contain tests specified to evaluate the performances. For LED lighting, the standards can also be grouped into LED component level, and LED subsystem and system level such as luminaire or lighting fixture standards, this applies for testing and for performance. What Are LED Lighting Standards?

Many LED lighting standards have been established by the above organizations, yet many more are still under development. As LEDs rapidly penetrate the general illumination sector, professionals are working diligently and with urgency to develop new LED lighting standards. The challenge is steep, as all standards should have a scope to define the purpose, intent and overall coverage of the subject, a list of references, a list of definitions for the terminologies used in the standard, a rational and requirements for testing and /or performance. Depending on the subjects, the broad term of the standards can be published as: a) recommended practice, b) design guidelines, c) measurements, d) nomenclatures, and e) references (including technical memorandums, white papers and technical reports). The following list highlights LED lighting standards within the US that have been developed or under development. Because there are many organizations involved in developing LED lighting standards. The standardization process can be grouped by the organization to gain a clear overview. IESNA Testing Procedure Committee (TPC) has developed two standards: 1) IESNA LM-79, “Electrical and Photometric Measurements of SolidState Lighting Products.” This is a subsystem and system level testing standard; 2) IESNA LM-80, “Measuring Lumen Maintenance of LED Source.” This is a component level testing standard. TPC is currently developing two new LED standards, one for high power LED measurement, another for measuring LED lamp or light engine lumen output temperature dependency. IESNA Roadway Lighting Committee (RLC) is currently revising existing standards to address LED light source related specifics, ANSI / IESNA PR-8, “Roadway Lighting,” and RP-20, “Lighting for Parking Facilities.” These are system level performance standards. IESNA Lighting Source Committee (LSC) has published a document, IESNA TM-16, “Light Emitting Diode (LED) Source and System.”

20 LED Journal | August/September 2009

IESNA Nomenclature has published an addendum for ANSI / IESNA PR-16, “Nomenclature and Definitions for Illuminating Engineering” to provide definitions of the terminologies for LED lighting. The last two documents are references. ANSI, with effort from joint working groups (C78-09 and C82-04), has published ANSI C78.388, “Specifications for the Chromaticity of Solid State Lighting Products”. This is a system level performance standard. NEMA Solid-State Lighting Technical Committee has established one LED related white paper, NEMA LSD-44, “Solid State Lighting – The Need for a New Generation of Sockets & Interconnects.” Currently, the committee is working on several new NEMA standards, a) solid-state lighting driver, a subsystem level performance standard, b) LED binning, a component level performance standard, c) NEMA premium brand, a system level performance standard, d) solid-state lighting dimmer, a subsystem level performance standard. The committee is also working on new white papers including NEMA LSD-45, “Recommendations for Solid State Lighting Sub-Assembly Interfaces for Luminaires,” and an NEM-ALA (American Lighting Association) joint white paper, “Solid State Lighting – Definitions for Functional and Decorative Applications.” UL is continuing revising its outline of investigation and preparing to establish a LED source safety standards, UL8750, “Standard for Light Emitting Diode (LED) Equipment for Use in Lighting Products.” IEEE is developing a standard under IEEE PAR1789, “Recommending Practices for Modulating Current in High Brightness LEDs for Mitigating Health Risks to Viewers.” These are the highlights of major LED lighting related standardization activities in the US. On an international basis, there is also significant activity being carried out in Europe, Asia and other parts of world. Standard development is a complicated and lengthy process, often taking years, and it is based on the consensus of field experts in the market. Because LED lighting is still a relatively new technology, and experience with product design, manufacturing, and applications in the general lighting arena are limited, it is challenging to reach to the consensus needed for establishing corresponding industry standards. A standard should be objective, credible, consistent and useful to providing guidance for users to design or use the products described. A standard can’t be perfect, and often needs to be revised based on new practices and findings. Thanks to industry experts who lend their time and expertise to advancing the understanding of LED technology, standards are being established that will lead to more rapid and wider adoption of LED lighting for the general illumination market. Dr. Jianzhong Jiao is the manager of Regulations and Emerging Technologies at Osram Opto Semiconductors, Inc. Dr. Jiao is responsible for representing Osram Opto Semiconductors in establishing and maintaining regulatory standards for solid state lighting semiconductor technology and for researching and exploring emerging semiconductor technologies for sensing, illumination and visualization. Dr. Jiao was recently elected Chairman of the Next Generation Lighting Industry Alliance (NGLIA). He is also the Chairman of NEMS ( National Energy Modeling System) SSL Section Technical Committee and a leader and member of several working groups in ANSI, NEMA, IENSA and UL. He can be reached at [email protected].

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Assembly/Manufacturing Equipment. . .22 Assembly/Manufacturing Services . . . .22 Architecture/Design . . . . . . . . . . . . . . . 22 Automotive. . . . . . . . . . . . . . . . . . . . . . .22 Backlighting. . . . . . . . . . . . . . . . . . . . . . .24 Components. . . . . . . . . . . . . . . . . . . . . . . 24 Connectors/Interfaces. . . . . . . . . . . . . . 24 Design/Engineering Services . . . . . . . . 24 Diodes/Modules/Arrays. . . . . . . . . . . . . .26 Displays. . . . . . . . . . . . . . . . . . . . . . . . . . 26 Drivers/Controllers. . . . . . . . . . . . . . . . .26 Encapsulants . . . . . . . . . . . . . . . . . . . . . .26 Epitaxy/Fabrication Equipment. . . . . . . .26 General Lighting . . . . . . . . . . . . . . . . . . . 28 Gels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 ICs/Semiconductors . . . . . . . . . . . . . . . . 28

Instrumentation. . . . . . . . . . . . . . . . . . .28 LED Chips . . . . . . . . . . . . . . . . . . . . . . . . .28 LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28 Lighting Fixtures/Systems . . . . . . . . . . .29 Materials & Packaging . . . . . . . . . . . . . .29 Medical . . . . . . . . . . . . . . . . . . . . . . . . . . 29 OLEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 Optics . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Power Supplies. . . . . . . . . . . . . . . . . . . . .30 Signage . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Software. . . . . . . . . . . . . . . . . . . . . . . . . 30 Substrates. . . . . . . . . . . . . . . . . . . . . . . .30 Test Equipment . . . . . . . . . . . . . . . . . . . . 31 Testing Services. . . . . . . . . . . . . . . . . . . 31

2009 annual resource guide

American Bright Optoelectronics Corporation provides various levels of LED-related solutions, with an offering that includes discrete through-hole and surface mount LEDs (visible and invisible, standard and high power), LED displays, LED clusters and arrays, progressing to more advanced LEDrelated assembly services and engineering support for LED-based product designs which offers a wide variety of services with a global reach and local US support, including through-hole and surface mount LED board assembly and non-eutectic chip on board technology. The company’s in-depth knowledge of special materials and methods allows it to provide thermal management solutions to customers in applications using high power LEDs. Expertise in MCPCB and flexible circuits is featured as well. American Bright has willingly and competently worked on assembly projects calling out various popular LED brands and styles—not limited to its own LED division’s products. Bin sorting at die and device level are offered. Custom plastic molding services and modular solutions for designers of solid-state lighting are also available to suit specific requirements from customers. Assembly facilities are ISO-14001 and TS-16949 certified. American Bright announced the introduction of 5W/10W LED Panel and 10W/20W LED Light Engine featuring its new direct die attachment (DDA) technology and integrated thermal management architecture that increases service life, luminous output and overall luminary efficiency. The new family of products achieve up to typical 65 lpw and can be selected in a broad range of industry standard color temperatures ranging from neutral white (4500K) to cool white (7000K). The LED Panel and Light Engine are ideally engineered SSL solutions for luminaries designed for every application.

American Bright Optoelectronics Corp. 13815-C Magnolia Ave. • Chino, CA 91710 888-533-0800 [email protected] www.americanbrightled.com

Bergquist Thermal Clad is an insulated metal substrate circuit board providing complete thermal management systems for surface mount and High Power LED applications. Available in standard and custom configurations, Bergquist Thermal Clad solutions provide better thermal management with lower die temperatures, extended LED lifetimes, and increased light output. The Bergquist Company designs and manufactures high performance thermal management materials used to dissipate heat and keep electronic components cool. With some of the best-known brands in the business including: Sil-Pad®, Gap Pad®, Gap Fillers, Bond-Ply®, and Hi-Flow® phase change grease replacement materials; Bergquist is your total thermal management supplier.

The Bergquist Company 18930 West 78th Street • Chanhassen, MN 55317 Contact: Markus Benson 1-800-347-4572 [email protected] www.bergquistcompany.com

22 LED Journal | August/September 2009

Assembly/Manufacturing Equipment ASM Pacific Technology Ltd www.asmpacific.com CAO Group Inc www.caogroup.com Ecogreen Solutions Inc. www.ecogreen.cc Navitar Inc www.navitar.com Palomar Technologies Inc www.palomartechnologies.com Quintel Corp www.quintelcorp.com Radionic www.radionic.net SphereOptics www.sphereoptics.com Teledyne Hastings Instruments www.teledyne-hi.com Yokogawa Corp of America www.yokogawa.com/tm Assembly/Manufacturing Services 4D Optical LLC www.4doptical.com American Bright Optoelectronics www.americanbrightled.com Data Display Products (DDO) www.datadisplay.com Ecogreen Solutions Inc. www.ecogreen.cc J P Sercel Associates Inc www.jpsalaser.com LEDdynamics www.leddynamics.com LED Specialists, Inc. www.ledspecialists.com Light Emission Technology Ltd. www.ledemission.com Magna Sign International www.magnasign.com Nu Horizons Electronics Corp www.nuhorizons.com Radiant Technology Corp www.radianttech.com Signcomplex Limited www.signcomplex.com Stratedge Corp www.stratedge.com Zarlink Semiconductor www.zarlink.com Architecture/Design Advanced Lighting Systems Inc www.advancedlighting.com Bivar, Inc. www.bivar.com CML Innovative Technologies Inc www.cml-it.com Justin Inc www.justininc.com Kwality Photonics P Ltd www.kwalityindia.com Labsphere Inc www.labsphere.com LEDtronics, Inc. www.LEDtronics.com Luminus Devices Inc www.luminus.com OSRAM Opto Semiconductors GmbH www.osram-os.com Quantum Silicones Qsi www.quantumsilicones.com Signcomplex Limited www.signcomplex.com SloanLED Co www.sloanled.com Teka Illumination www.tekaillumination.com Versabright www.versabright.com World Electric Supply www.worldelectricsupply.com Yole Development www.yole.fr Zetex Inc www.zetex.com Automotive Bayer MaterialScience LLC www.bayermaterialsciencenafta.com California Micro Devices www.cmd.com Cree, Inc. www.cree.com IRC www.irctt.com National Semiconductor Corp www.national.com Nichia America Corp www.nichia.com OSRAM Opto Semiconductors www.osram-os.com Para Light Corp www.paralight.us Rogers Corporation www.rogerscorp.com Supertex Inc www.supertex.com Visual Instrumentation Corp www.visinst.com Yokogawa Corp of America www.yokogawa.com/tm Yole Development www.yole.fr

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2009 annual resource guide

Cree is leading the LED lighting revolution and setting the stage to obsolete the incandescent light bulb through the use of energy efficient, environmentally friendly LED lighting. Cree is a market leading innovator of lighting-class LEDs, LED lighting solutions, and semiconductor solutions for wireless and power applications. Cree¹s product families include LED fixtures and lamps, blue and green LED chips, high-brightness LEDs, lighting-class power LEDs, power-switching devices and radio-frequency/wireless devices. Cree solutions are driving improvements in applications such as general illumination, backlighting, electronic signs and signals, variable-speed motors, and wireless communications.

ElectraLED® designs and manufactures high-quality, energy-efficient commercial LED light products. The ElectraLED® TruColor™ LED Lighting fixtures provide ultimate array lighting solutions for refrigerated display cases, walk-in coolers, track lighting, and loading docks for the food retail and distribution industry. ElectraLED is a certified WBE with all manufacturing facilities located in Florida.

Cree, Inc. 4600 Silicon Drive • Durham, NC 27703 Contact: Eric Goins 919-313-5300

ElectraLED, Inc. 12722 62nd. St. N. Suite 200 Largo, FL. 33773 Contact: Ryan Begin 727-561-7610

[email protected] www.cree.com

[email protected] www.electraled.com

A leading manufacturer of LED based lighting systems; D-led's key target is the integration of lighting and electronic control. D-led's LED controllers and drivers are engineered from the ground up for use in The Entertainment, Media, and Architectural markets. Featuring key technologies such as: Flicker Free dimming, thermal protection, system error report and more, insuring maximum performance and reliability over time. All of D-led's products are DMX512 compatible and are CE, FCC, cTUVus approved. ACE line controllers will drive all “high brightness”, “current regulated LEDs” currently on the market, and can be found in a variety of projects worldwide.

D-LED Illumination Technologies 9 Hanagar Str. • Hod Hasharon 45421 Israel Contact: Mr. Yoav Bar 972-54-3091-633 [email protected] www.d-led.net

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Ellsworth Adhesives is a leading global distributor of over 65manufacturers including: • Dow Corning • Henkel-Loctite • Dymax • Emerson & Cuming …with brands such as: • Sylgard • Stycast • Eccobond • Hysol • …and more Our comprehensive product line includes: • Thermally conductive adhesives and films • Elastomers

• Resins • Gels • Optical grade silicone encapsulants • Coatings and underfills • Electrically conductive materials • Liquid casting and molding • Optical couplants • Cured and uncured liquids • UV/LED light cure products • Dispensing and curing systems We are ISO 9001:2000 registered and carry RoHS compliant products. Visit www.ellsworth.com to request a quote, catalog or talk to a Glue Doctor Technical Expert about your application needs.

Ellsworth Adhesives W129 N10825 Washington Drive Germantown, WI 53022 1-800-888-0698 [email protected] www.ellsworth.com

August/September 2009 | LED Journal 23

2009 annual resource guide

Since 1965, International Light Technologies, through our Sources Division, has been providing customers with off-the-shelf and customized solutions across a full spectrum of light sources, including high power LEDs and modules, UV-Visible-IR lamps, specialized replacement lamps, and power supplies. Through our Systems Division, we have been solving the inherent difficulties in light measurement through the design and manufacture of a wide range of highly accurate light measurement instruments and by providing the most reliable NIST traceable commercial calibration services available. Our new Innovations Division, combining the expertise of both of these divisions, manufactures an ultra slim Illumaled product line of LED fixtures for task lighting and under cabinet illumination, along with a high efficiency Linear Lighting System for case and other similar lighting devises, plus multiple forms of signage lighting including solar powered devices. We are committed to providing our customer the best technical lighting products available.

International Light Technologies Inc Sources, System and Innovations Divisions 10 Technology Drive • Peabody MA 01960 Phone: 978-818-6180 • Fax: 978-818-6181 ISO9001:2000 Certified www.intl-lighttech.com

Backlighting Avago Technologies www.avagotech.com Barbizon Lighting Company www.barbizon.com Celestica www.celestica.com Dora Texas Corp www.doratexas.com Future Lighting Solutions www.futurelightingsolutions.com JKL Components Corporation www.jkllamps.com Lambda Research Corporation www.lambdares.com LED, Inc. www.ledinc.biz Monolithic Power Systems, Inc. www.monolithicpower.com Nexxus Lighting Inc www.nexxuslighting.com ON Semiconductor www.onsemi.com OPTEK Technology, Inc. www.optekinc.com OSRAM Opto Semiconductors www.osram-os.com Palomar Technologies Inc www.palomartechnologies.com Shin-Etsu Chemical Co Ltd www.silicone.je/e/ Toyoda Gosei North America www.toyodagosei.com Components American Bright Optoelectronics www.americanbrightled.com Arrow Electronics, Inc. http://lighting.arrow.com BrightBurst Technologies, LLC www.BrightBurstTech.com California Micro Devices www.cmd.com GE Lumination www.led.com International Light Technologies www.intl-lighttech.com James Electronics www.jorgans.com RASIRC www.rasirc.com SignResource www.signresource.com Tyco Electronics Corp. www.tycoelectronics.com Zettler Components Inc www.zettlercontrols.com Connectors/Interfaces Bulbtronics www.bulbtronics.com Ecogreen Solutions Inc. www.ecogreen.cc Lamina Lighting, Inc www.laminalighting.com LEDSource LLC www.ledsource.com Tyco Electronics Corp. www.tycoelectronics.com Vin Overseas Ltd www.vinled.com

Since 1963, Kenall is one of the industry’s most respected independent lighting manufacturers in the U.S., producing high performance lighting for commercial and architectural markets. Kenall produces and supports high quality and durable lighting solutions for the most demanding of environments. Our products are designed and certified to meet all applicable and recognized performance standards, including: those that resist or reduce physical abuse and tampering; corrosion; ingress and passage of insects, dirt, water and microbial contaminants; and RFI and EMI interference. Primary applications include public access, healthcare, education, correctional, microbial and particulate ingress protection and containment, research, and transportation services.

Kenall 1020 Lakeside Drive • Gurnee, IL 60031 Contact: Adrienne Cramer 847-599-3453

Design/Engineering Services AKJ Inventions www.ajki.eu Arrow Electronics, Inc. http://lighting.arrow.com Asahi Spectra USA Inc www.asahi-spectra.com BrightBurst Technologies, LLC www.BrightBurstTech.com BS Elektronik Service GmbH www.bs-elektronik-service.de Ellsworth Adhesives www.ellsworth.com Gallegos Lighting Design www.gallegoslighting.com International Light Technologies www.intl-lighttech.com LED Specialists, Inc. www.ledspecialists.com Moulded Optics www.mouldedoptics.com OPTEK Technology, Inc. www.optekinc.com Optical Research Associates www.opticalres.com Orb Optronix, Inc. www.orboptronix.com Photon Engineering www.photonengr.com PolyBrite International www.polybrite.com Visionary Lighting & Display LLC www.visionarylighting.com XiTRON Technologies www.xitrontech.com

[email protected] www.kenall.com

24 LED Journal | August/September 2009

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2009 annual resource guide

Lambda Research provides world-class optical software TracePro® for lighting design and engineering for automotive, architectural and specialty illumination applications, TracePro Bridge™ for SolidWorks® for 3D MCAD interoperability with optical software, and OSLO® lens design software. TracePro models radiometric and photometric systems and accurately and quickly predicts performance of LED systems. TracePro features multiple design analysis outputs such as emission spectrums, angular distributions, light intensities, illuminance/luminance maps, CIE xy/uv charts and color view and RepTiles surfaces for micro-structure mapping for backlighting. TracePro Bridge for SolidWorks offers a seamless interface between mechanical design and optical analysis. OSLO is used by the world’s best optical designers for the design of sophisticated lens systems.

Optical Research Associates (ORA®) is the world’s leading developer of optical and illumination design software, providing CODE V® for image-forming optics, and LightTools® for innovative illumination design, including backlit and projection displays, automotive instrumentation, LEDs, reflectors, and more. ORA is also the largest independent supplier of optical engineering services with more than 4,500 completed projects since the company was founded in 1963. Working with our distribution partners, we now have customers in more than 25 countries.

Lambda Research Corporation 25 Porter Road • Littleton, MA 01460 Contact: Michael Gauvin 978-486-0766

Optical Research Associates 3280 E. Foothill Blvd. Suite 300 • Pasadena, CA 91107 Stuart David 626-795-9101

[email protected] www.lambdares.com

[email protected] www.opticalres.com

Monolithic Power Systems, Inc. (MPS) designs, develops and markets proprietary, advanced analog and mixed-signal semiconductors. The company combines advanced process technology with its highly experienced analog designers to produce high-performance power management integrated circuits (ICs) for DC to DC converters, LED drivers, Cold Cathode Fluorescent Lamp (CCFL) backlight controllers, Class-D audio amplifiers, and other Linear ICs. MPS products are used extensively in computing and network communications products, flat panel TVs and a wide variety of consumer and portable electronics products. MPS partners with worldclass manufacturing organizations to deliver top quality, ultra-compact, high-performance solutions through productive, cost-efficient channels. Founded in 1997 and headquartered in San Jose, California, the company has expanded its global presence with sales offices in Taiwan, China, Korea, Japan, and Europe.

Monolithic Power Systems, Inc. 6409 Guadalupe Mines Road San Jose, CA 95120 USA Tel: +1 408-826-0600 [email protected] www.monolithicpower.com

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Through its LED Technology Center located in Kirkland, Washington, Orb Optronix provides leading edge LED product development, light measurement equipment and LED & SSL test services. Orb’s products include the revolutionary ETO™ LED Characterization System which makes the detailed parametric measurement of LEDs over a wide variety of input variables simple.Orb's Engineering Services Group provides leading edge product development services and consulting, taking an interdisciplinary systems approach to working with LEDs in product development.Orb's Test Laboratory provides comprehensive LED and SSL test services including LM-79 and LM-80 for CALiPER and ENERGY STAR along with photobiological hazard assessment services per the ANSI RP-27.3-07, IEC 62471 and CIE S009.

Orb Optronix, Inc. 1003 7th Avenue, Suite B • Kirkland, WA 98033 Contact: Rob Leonard 425-605-8500 [email protected] www.orboptronix.com

August/September 2009 | LED Journal 25

2009 annual resource guide

PerkinElmer is a global technology leader focused on creating a brighter, safer, healthier environment through our world-class illumination and detection solutions.We offer a one-stop-shop for complete, custom LED Solutions including optical design and testing, mechanical and electrical design, thermal management, and custom chip-on-board (COB) packaging. Through our global LED team and through two dedicated, ISO-certified LED facilities in the USA and Germany, we focus on accelerating our customers' competitive edge with energy-efficient LED-based lighting designs for medical, dental, safety and security, industrial, and architectural markets. PerkinElmer is your trusted partner for Custom LED Solutions.

PerkinElmer 35 Congress Street • Salem, MA 01970 Contact: Francine Bernitz, Global Marketing Director 978-224-4321 [email protected] www.perkinelmer.com/ledsolutions

Philips Emergency Lighting is a global leader in emergency lighting solutions for commercial, industrial and institutional applications. The company, headquartered in Collierville, TN, designs and manufactures innovative, award-winning Philips Bodine branded products. Its Philips Bodine BSL23C Emergency LED Driver was the winner of the emergency lighting category at Lightfair 2008. The Philips Bodine line includes not only codecompliant emergency drivers for LED lighting but also fluorescent emergency ballasts, HID backup ballasts and generator-compatible units. Philips Emergency Lighting was founded in 1962 and acquired by Philips in 2006. The company provides nearly a halfcentury of experience, quality, reliability and American ingenuity in every product. Philips Emergency Lighting (Bodine) P.O. Box 460 • Collierville, TN 38027-0460 Contact: Melody Ramsey 800-223-5728 [email protected] www.philips.com/bodine

26 LED Journal | August/September 2009

Diodes/Modules/Arrays 100 West Electronics www.100West.com BridgeLux Inc www.bridgelux.com Farnell www.farnell.com JCA Technologies www.jcatech.com ROHM Semiconductor, USA LLC www.rohmsemiconductor.com Samsung LED www.samsung.com Sunovia Energy Technologies www.sunoviaenergy.com Three Five Compounds, Inc. www.iii-vcompounds.com UPEC Electronics Corp www.u-pec.com Visitech www.visitech.no West Coast Custom Designs www.wccdUSA.com Displays Avago Technologies ArticulatedTechnologies LLC Daktronics Inc Gamma Scientific Hymite A/S Linrose Electronics, Inc. Novaled AG Underwriters Laboratories, Inc Yokogawa Corp of America

www.avagotech.com www.articulux.com www.daktronics.com www.gamma-sci.com www.hymite.com www.Linrose.com www.novaled.com www.ul.com www.yokogawa.com/tm

Drivers/Controllers Bartco Lighting www.bartcolighting.com D-LED Illumination Technologies www.d-led.net Fusion Optix Inc www.fusionoptix.com Journee Lighting Inc www.journeelighting.com Lutron Electronics Co., Inc. www.lutron.com/LED Monolithic Power Systems, Inc. www.monolithicpower.com ON Semiconductor www.onsemi.com Philips Emergency Lighting (Bodine) www.philips.com/bodine Rueste International Ltd www.rueste.com Sipex www.sipex.com Encapsulants ABLEtech LLC www.abletechllc.com Ellsworth Adhesives www.ellsworth.com GE Advanced Materials www.ge.com Lord Corporation www.lord.com Lumen Technology International www.lumentec.com Momentive Performance Materials Inc www.momentive.com Quantum Silicones Qsi www.quantumsilicones.com Specialty Coating Systems www.scscoatings.com Vin Overseas Ltd www.vinled.com Zymet Inc www.zymet.com Epitaxy/Fabrication Equipment Applied MicroStructures, Inc www.appliedmst.com Despatch Industries Inc - Ransco Products www.despatch.com Eldim SA www.eldim.fr Gloria Spire Solar LLC www.gloriaspire.com Highleds www.highleds.com Plasma Surface Engineering Corp www.msi-pse.com Spire Semiconductor, LLC www.spirecorp.com Teledyne Hastings Instruments www.teledyne-hi.com Umicore www.umicore.com Veeco Instruments Inc www.veeco.com Wafer World Inc www.waferworld.com

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2009 annual resource guide

Photon Engineering, LLC, proudly announces the release of FRED and FRED Optimum version 8.50, the premier proven optical and illumination engineering software. FRED can model the interaction of light emitted from any type of source with any optomechanical geometry, and includes the effects of scatter, diffraction, transmission, reflection, and absorption of light. Photon Engineering also provides superior optical engineering services to commercial and government customers, custom software solutions, introductory FRED tutorials and advanced short courses on the topics of coherence theory, illumination and stray light. For more information, contact [email protected] or visit the company’s Web site at www.photonengr.com.

Signcomplex is a leading manufacturer of LED lighting products in China. The line covers LED strip, bulb, module, aquatic light, inground light, flourescent replacement tube,etc. We have become one of the biggest suppliers of LED strip light for indoor decoration, architecture, commercial applications. As an ISO9001:2000 certified company, Signcomplex has been deticated to researching, producing and marketing high-tech and echo-freiendly LED products. All items from Signcomplex are CE certified and ROHS compliant. We provide quality solid state LED lights to clients in Europe, America and Asian-Pacific countries. Besides standard products, Signcomplex also provides OEM/ODM service and assembly.

Photon Engineering 440 S. Williams Blvd., Suite 106 • Tucson, AZ 85711 Contact: Donata Pfisterer 520-733-9557

Signcomplex Limited 3-4/F., Bldg. C, Chuangfu Science & Technology Park, Shenzhen/Gruangdong 518108 China Contact: Peter Wu +86 755 2760 8650 [email protected] www.signcomplex.com

[email protected] www.photonengr.com

Samsung LED Co. Ltd. began its operation in April, 2009 to produce world class light-emitting diodes (LEDs). Samsung LED is a joint venture between Samsung Electro-Mechanics Co. Ltd., (SEMCO) and Samsung Electronics Co. Ltd., (SEC) with equal investment between the two companies. Before the formation of Samsung LED, the LED business was operated by SEMCO since 1995. Samsung LED has epi and chip production sites in Korea and LED packaging sites in Korea and China. Samsung is dedicating their resources to become a leading manufacture of middle power and high power LEDs and LED lighting solutions.

Samsung LED 3345 Michelson Dr., Ste. 350 Irvine, CA 92612 Contact: Steve Byun 949-797-8054 [email protected]

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For over 60 years, Tyco Electronics has worked to lower costs, increase reliability and devise novel ways to create lighting products. Our product portfolio includes interconnects, circuit protection devices, solid state relays, terminal blocks, thermal solutions and wire and cable for solid-state lighting applications. With market dynamics forcing ever-shortening design cycles, our ability to quickly turn around product concepts keeps projects on schedule and shortens time to market. We design and test our products to satisfy requirements through qualification testing, periodic retesting, and labeling and marking. We comply with standards from ANSI/AAMI, IEC, UL/CSA, CE, VDE and other international agencies.

Tyco Electronics P.O. Box 3608 • Harrisburg, PA 17105-3608 Contact: Product Information 717-986-7777 [email protected] www.tycoelectronics.com/lighting

August/September 2009 | LED Journal 27

2009 annual resource guide

With the world-class LED manufacturing facility since 1969 (25 million products manufactured daily, ISO14001 / ISO9001 / TS16949 certified, RoHS compliant, white LED licensed), VaOpto offers LEDs, LED assemblies, and LED complete products with U.S.A. quality (U.S.A. patented/patent pending, cULus certified/pending) and effective price.

General Lighting Barbizon Lighting Company www.barbizon.com BI Technologies www.bitechnologies.com BrightBurst Technologies, LLC www.BrightBurstTech.com Edge Lighting www.edgelighting.com H&H Industries Inc www.lightsbyhh.com Kwality Electricals Private Limited http://LED-ecolight.page.tl LED Specialists, Inc. www.ledspecialists.com Lutron Electronics Co., Inc. www.lutron.com/LED Lynk Labs, Inc. www.lynklabs.com MaxLite www.maxlite.com Monolithic Power Systems, Inc. www.monolithicpower.com Nexxus Lighting Inc www.nexxuslighting.com OPTEK Technology, Inc. www.optekinc.com Rueste International Ltd www.rueste.com Samsung LED www.samsung.com SunLED Corp www.us.sunled.com Technical Consumer Products, Inc (TCP) www.tcpi.com Winona Lighting www.winonalighting.com/winonaled Gels

Virginia Optoelectronics, Inc. 1405 Ashford Court • Blacksburg, VA 24060 Contact: Charles Li 540-449-9658 [email protected] www.vaopto.com

Williams Advanced Materials (WAM) is a leading global supplier of specialty materials and services for thin film coatings. WAM supplies the LED industry with an array of sputtering targets and evaporation materials, pure and custom alloys along with Shield Kit Precision Parts Cleaning Services and Precious Metal Refining and Recycling. The combination of supplying thin film materials and shield kit cleaning services provides customers a value added solution reducing overall material cost and management. Materials – Au, Ag, Pd, AuGe, AuSn, Ni, Ti, Precious Metal Alloys and more… Shield Kit Precision Parts Cleaning include chemical and mechanical metal layer removal, surface texturizing and final ultrasonic parts cleaning and clean room packaging. In-house precious metals reclamation services offer quick and accurate metal returns. Williams Advanced Materials 2978 Main Street • Buffalo, NY 14214 Contact: Lisa Bruce 716-837-1000 [email protected] www.williams-adv.com

28 LED Journal | August/September 2009

ACC Silicones Ltd Bulbtronics Cofan USA Ellsworth Adhesives Quantum Silicones Qsi Vin Overseas Ltd

www.acc-silicones.com www.bulbtronics.com www.cofan.com www.ellsworth.com www.quantumsilicones.com www.vinled.com

ICs/Semiconductors Andy Optoelectronic Co.,Ltd www.ledlighting.cc Bulbtronics www.bulbtronics.com Independent Testing Labs Inc www.itlboulder.com Linear Technology Corp www.linear.com Monolithic Power Systems, Inc. www.monolithicpower.com National LED Direct www.nationalleddirect.com Zymet Inc www.zymet.com

SphereOptics

Instrumentation www.sphereoptics.com LED Chips

ArticulatedTechnologies LLC Bratic Enterprises LLC FlatIron Consultants Inc. Opto Diode Corp PerkinElmer Optoelectronics Texas Photonics Inc

www.articulux.com www.bratic.net under construction www.optodiode.com www.optoelectronics.perkinelmer.com www.texas-photonics.com

LEDs American Bright Optoelectronics www.americanbrightled.com Arrow Electronics, Inc. http://lighting.arrow.com Bivar, Inc. www.bivar.com Cree, Inc. www.cree.com D-LED Illumination Technologies www.d-led.net Denso International America www.densocorp-na.com ElectraLED, Inc. www.electraled.com Grote Industries www.grote.com Honeywell Obstruction Lighting www.oblighting.com International Light Technologies www.intl-lighttech.com

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2009 annual resource guide LEDs continued Kenall www.kenall.com Lane Technical Sales www.lanetechsales.com LED, Inc. www.ledinc.biz Light Emission Technology Ltd. www.ledemission.com Linrose Electronics, Inc. www.Linrose.com Lutron Electronics Co., Inc. www.lutron.com/LED Lynk Labs, Inc. www.lynklabs.com Martin Professional Inc www.martinpro.com Nuelight Corp www.nuelight..com Optrans Universal Corp www.optransuniversal.com OSRAM Opto Semiconductors www.osram-os.com PerkinElmer Optoelectronics www.perkinelmer.com Richter Metalcraft Corp www.charlesrichter.com Samsung LED www.samsung.com Signcomplex Limited www.signcomplex.com Three Five Compounds, Inc. www.iii-vcompounds.com Virginia Optoelectronics, Inc. www.vaopto.com Wireless Solutions Sweden AB www.wirelessdmx.com Lighting Fixtures/Systems AgiLight Inc www.agilight.com Cree, Inc. www.cree.com D-LED Illumination Technologies www.d-led.net Durel Corp www.rogerscorporation.com/durel ElectraLED, Inc. www.electraled.com Glow Lighting www.glowlighting.com Hella Lighting Corp www.hella.com International Light Technologies www.intl-lighttech.com Light Emission Technology Ltd. www.ledemission.com JM Electronics Co Ltd www.jmeleco.com www.kenall.com Kenall LED Power Inc www.ledpower.com PerkinElmer Optoelectronics www.perkinelmer.com Savoy House www.savoyhouse.com Tomar Electronics Inc www.tomar.com Versabright www.versabright.com Virginia Optoelectronics, Inc. www.vaopto.com WAC Lighting www.waclighting.com Materials & Packaging Adhesives Research Inc www.adhesivesresearch.com Bayer MaterialScience LLC www.bayermaterialsciencenafta.com DuPont Teijin Films USA www.dupontteijinfilms.com Ellsworth Adhesives www.ellsworth.com GE Plastics www.geplastics.com Vin Overseas Ltd www.vinled.com Virginia Optoelectronics, Inc. www.vaopto.com Wako Chemicals USA Inc www.wakousa.com Williams Advanced Materials www.williams-adv.com Zymet Inc www.zymet.com Medical California Micro Devices LightTest Labs, LLC Pure Lighting LLC Three Five Compounds, Inc. Visitech Williams Advanced Materials

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www.cmd.com www.lighttestlabs.com www.purellc.com www.iii-vcompounds.com www.visitech.no www.williams-adv.com

Arrow Electronics, Inc. 7459 S. Lima St. Englewood, CO 80112 Contact: Arrow Lighting 1-888-9LIGHT1 [email protected] http://lighting.arrow.com Arrow Lighting’s experts are dedicated to providing HB-LED solutions from concept through production utilizing our design tools, engineering services and the industry’s premier line card of lighting manufactures.

Avago Technologies 350 West Trimble Rd San Jose, CA 95131 Contact: Technical Support 1-800-235-0312 or 1-408-435-4903 [email protected] www.avagotech.com or www.avagotechlighting.com

Avago Technologies is known for its LED's performance, efficiency and reliability. Avago offers an extensive portfolio of products - high brightness and high power LEDs, PLCC surface-mount LEDs, color sensors and display backlighting module solutions.

BrightBurst Technologies, LLC 610 Township Line Road • Hillsborough, NJ 08844 Contact: Peter Dimitrov-Kuhl 908-359-5851 [email protected] www.BrightBurstTech.com BrightBurst Technologies provides premier optical solutions for LED green lighting applications. Our proprietary designs increase output brightness, improve uniformity and save energy dollars.

LED Specialists, Inc. 7A Main St. Kings Park, NY 11754 Contact: Michael Fusco 631-269-0841 [email protected] www.ledspecialists.com Engineering Services for design and development of LED lighting products. Subassemblies through complete light fixtures. Manufacturing services for LED arrays, drivers and other components.

August/September 2009 | LED Journal 29

2009 annual resource guide LED, INC. 1601 Fairview Drive Carson City, NV 89701 Contact: Allen Wen 775-885-1510 [email protected] www.ledinc.biz The Brilliance of our LED lighting in your Channel Letters, Interior Design and Architectural application will guarantee that second glance.

Light Emission Technology Ltd. 1261 Broadway Suite 403 New York, NY 10001 Contact: Thomas Guan 212-213-8290 [email protected] www.ledemission.com Light Emission Technology Ltd. introduces the world’s longest life, high intensity, and dimmable LED lamp series. Reduce energy and replacement costs by 90% with high CRI drop in replacements operating from 80-260V.

Linrose Electronics, Inc 29 Cain Drive Plainview, NY 11791 Contact: Debra Freedman 516-293-2520 [email protected] www.Linrose.com Master Distributors of Bare LED's, LED Strip & Rope Lighting, LED Housing, Connectors and Lenses,LED/Neon/Incandecent Indicator Lights. Specializing in those smaller businesses who need personal service.

Lutron Electronics Co., Inc. 7200 Suter Rd. Coopersburg, PA 18036 Contact: LED Solutions Group 610-282-6341 [email protected] www.lutron.com/LED Lutron designs and delivers industry leading lighting controls that enhance the visual environment and save energy. Lutron offers LED drivers that dim to 1% and additional LED dimming solutions.

30 LED Journal | August/September 2009

OLEDs DuPont EagleLight.com Linrose Electronics, Inc. Novaled AG Universal Display Corp

www.usa.dupont.com www.eaglelight.com www.Linrose.com www.novaled.com www.universaldisplay.com

Optics Advanced Link Photonics Inc www.alpincorp.com BrightBurst Technologies, LLC www.BrightBurstTech.com Centellax Inc www.centellax.com Hamamatsu Corp www.hamamatsu.com Lambda Research Corporation www.lambdares.com Ledman Optoelectronic Co Ltd www.ledman.cn Opto Technology Inc www.optotech.com PerkinElmer Optoelectronics www.perkinelmer.com Photon Engineering www.photonengr.com PolyBrite International www.polybrite.com Williams Advanced Materials www.williams-adv.com World Electric Supply www.worldelectricsupply.com Zygo Corp www.zygo.com Power Supplies Advanced Analogic Technologies Inc www.analogictech.com Bartco Lighting www.bartcolighting.com Lynk Labs, Inc. www.lynklabs.com Power Integrations Inc www.powerint.com ROHM Semiconductor, USA LLC www.rohmsemiconductor.com Universal Lighting Technologies www.universalballast.com V•I Chip, Inc. http://vicorpower.com World Electric Supply www.worldelectricsupply.com Signage Avago Technologies www.avagotech.com Design LED Products Ltd www.designledproducts.com ElectraLED, Inc. www.electraled.com Heatron Inc www.heatron.com International Light Technologies www.intl-lighttech.com J&J Electronics Inc www.colorgloledlighting.com Labsphere Inc www.labsphere.com LED, Inc. www.ledinc.biz Permlight Products Inc www.permlight.com Sumitomo Corporation of America www.sumitomocorp.com Software ADDCO Inc Lambda Research Corporation Luminex Corp Optical Research Associates Photon Engineering RSoft Design Group ZEMAX Development Corp

www.addcoinc.com www.lambdares.com www.luminexcorp.com www.opticalres.com www.photonengr.com www.rsoftdesign.com www.zemax.com

Substrates Accuratus Ceramic Corp Bergquist Company California Micro Devices Rogers Corporation

www.accuratus.com www.bergquist.com www.cmd.com www.rogerscorp.com

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2009 annual resource guide

Lynk Labs Inc. 2511 Technology Drive Elgin, IL 60124 Contact: Sales 847-783-0123 [email protected] www.lynklabs.com

OSRAM Opto Semiconductors 1150 Kifer Road, Suite 100 Sunnyvale, CA 94086 Contact: Kate Cleveland 866-993-5211 [email protected] www.osram-os.com

Lynk Labs is the LED industry’s leading manufacturer of AC LED packages, light engines, drive and system technology. Accelerate product design and time to market with Lynk Labs AC LED technology.

OSRAM Opto Semiconductors is one of the leading manufacturers of optoelectronic semiconductor components and a reliable partner for semiconductor technologies. OSRAM's extensive LED product portfolio includes solutions for lighting, sensor and visualization applications.

OPTEK Technology 1645 Wallace Drive • Carrollton, TX 75006 Contact: Mike King 972-323-2308 [email protected] www.optekinc.com

SphereOptics One Horseshoe Pond Lane • Concord NH 03301 Contact: Joan Beaulieu 603-715-3000 [email protected] www.sphereoptics.com

OPTEK Technology partners with you to develop and manufacture solid state lighting solutions for your signage, backlighting, channel lighting, high brightness indicators and illuminators, automotive interior and exterior lighting, architectural and entertainment lighting applications.

SphereOptics designs, produces & sells precision radiometric and photometric test and measurement products for the aerospace, electronic imaging, LED, lighting, optics industries. The company offers a broad line of integrating sphere systems, specializing in custom design and manufacturing services.

Test Equipment Acorn Technology www.ledtemp.com Boston Electronics Corp www.boselec.com JMAR Technologies Inc www.jmar.com Konica Minolta www.konicaminolta.us LightPath Technologies Inc www.lightpath.com Molecular Imprints Inc www.molecularimprints.com Orb Optronix, Inc. www.orboptronix.com PANalytical Inc www.panalytical.com Purdy Electronics Corp www.purdyelectronics.com Rubicon Technology Inc www.rubicon-es2.com SphereOptics www.sphereoptics.com Storage Battery Systems Inc www.sbsbattery.com Test Coach Corp www.testcoach.com XiTRON Technologies www.xitrontech.com Testing Services CSA International www.csa-international.org Fox Group Inc www.thefoxgroupinc.com Fusion Optix Inc www.fusionoptix.com Heatron Inc www.heatron.com JDS Uniphase www.jdsu.com Labsphere www.labspherre.com Orb Optronix, Inc. www.orboptronix.com Photron Inc www.photron.com SphereOptics LLC www.sphereoptics.com Test Equipment Connection www.testequipmentconnection.com

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Three Five Compounds, Inc. 1261 Broadway Suite 403 New York, NY 10001 Contact: Thomas Guan 212-213-8290 [email protected] • www.iii-vcompounds.com Combining knowledge and experience III-V Compounds offers complete assemblies, consisting of optoelectronic components, PCBs, FPCs as well as cables, mechanical parts, and plastic moldings. We are also Cree’s LED chip distributor for North America and Europe.

V•I Chip Inc., A Vicor Company 25 Frontage Road Andover, MA 01810 Contact: Customer Service 800-735-6200 [email protected] vicorpower.com V•I Chip Inc. specifies, designs, manufactures and markets V•I Chip power components to enable next-generation power architecture in high-end computing, ATE, telecom, solid-state lighting and defense electronics markets worldwide.

August/September 2009 | LED Journal 31

feature

By Antony Christian, Systems Applications Engineer • Analog Devices, Inc.

Innovative Power Reduction Techniques Enable Handset Manufacturers to Provide Media Rich Devices The demand for mobile devices with high-end features has been rapidly increasing. Features like text messaging, gaming, GPS navigation, web browsing and video playback on high resolution color displays are becoming the norm in today’s portable consumer electronics market. While consumers are asking for these high-end features, they also want reasonable battery life. Unfortunately, the larger LCD displays used on these devices are backlight and processor intensive, which translates to longer and larger drain on the already limited battery capacity. At one time, monochrome display backlights used two green LEDs and consumed a mere 10 percent of the overall power consumption of mobile devices. Today however, the larger, higher resolution color displays required for multimedia devices have increased the on-time and backlight power consumption to more than 50 percent. Despite recent advances in battery technology, battery capacity has not evolved fast enough to keep up with the extra energy demands of multimedia mobile devices. Since battery technology has not improved at the same pace as battery usage, portable device manufacturers have encountered difficulties with meeting consumer expectations. Unless they develop innovative ways to reduce power consumption or increase battery capacity, they will need to sacrifice battery life for features. In addition to techniques such as time based dimming, display timeouts and user selectable brightness settings, many mobile device manufacturers are implementing ambient light sensing (ALS), content adaptive backlight control (cABC) and the use of keypad/GPIO expanders to help reduce current drain. The display backlight has become one of the top battery drain concerns for most portable device manufacturers. Media intensive devices with high-resolution color displays require that the display has proper backlighting at all time to avoid degrading optical performance and readability. Despite its constant need for backlighting and relatively high power consumption, highly transmissive displays are preferred by mobile device manufacturers. Its indoor performance, National Television Standard Committee (NTSC) color gamut ratio, high contrast ratio and high brightness have won it an easy victory over its reflective counterpart. To reduce backlight power consumption, it has become necessary to control and manage backlight intensity as closely as possible. While devices save power by dimming the backlight during times of inactivity, many devices have applications, such as web browsing, emails, GPS navigation, gaming or video playback, which require the backlight to remain on during long periods of user interaction. The brightness control in the products settings menu allows the user to adjust the backlight intensity to save power during these use cases, but requires user input and would need multiple changes for different ambient light conditions to really be effective. These techniques are no longer practical for the user, nor are they sufficient to meet today’s intensive and unique use cases. Ambient Light Sensing (ALS) The amount of back light required by an LCD or keypad can vary substantially with changes in the lighting environment. With ambient light sensing, a photo diode or transistor measures the local light intensity. The light source can be the sun, office lights or moonlight. The amount of light captured by the sensor is translated into current or voltage. Based on preset thresholds, the backlight driver or processor can then determine how much backlight is required by the LCD or keypad. Driving the high current required during sunny conditions wastes energy during dimmer light conditions and can cause eye strain in dark condi-

32 LED Journal | August/September 2009

tions. Changing backlight intensity based on ambient light conditions can save more than 60 percent of the current necessary to drive the backlight LEDs in bright conditions for typical use cases. ALS Implementation Methods Some manufacturers use an analog or digital light sensor IC to sense the ambient light. Analog light sensors convert the light into a current, while digital light sensors use an internal ADC to produce a digital bitstream. Analog light sensors are less expensive due to the simpler implementation. Regardless of which sensor is used, the output needs to be decoded in order to be useful. Many designs use the host processor to decode the sensor output and control the backlight. However, the host processor must be fast enough to provide multimedia features, so its higher speed and bandwidth also means higher current drain for ALS polling functions. Minimizing processor involvement is essential to keep down battery consumption. Some ICs integrate light input decoding and backlight driver control. There are several advantages to having the light sensor intelligence integrated in the backlight driver. First, the driver uses a simple state machine to perform the task, allowing the current consumption required to perform the decoding and backlight control to be reduced to less than 20 μA. Second, everything is in one package, thus minimizing the number of connections and traces in the PCB layout. Third, it minimizes back and forth communication between the backlight driver and the host processor. To provide flexibility to handset manufacturers, these integrated devices have implemented programmable threshold, hysteresis and filter time. Because all mechanical designs are different, it is essential that the intelligent driver have enough flexibility to handle all conditions. Programmable thresholds allow the handset manufacturers to program the range of light input that should be considered as daylight, office environment or dark. Hysteresis at each threshold keeps the backlight from tripping back and forth. Filter time allows the user to program how long the device should be exposed to a lighting environment before a backlight adjustment is made. Adjustments like these have made it easy to provide the flexibility handset manufacturers

Figure 1. Series backlight driver with integrated photo-sensor input and mini keypad/GPIO expander

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feature need to correct variances that may exist from product to product. Display Backlight Analysis A display backlight using six series LEDs driven at 18 mA draws 111 mA from the battery (assuming 3.5 V LED forward voltage, 85 percent driver efficiency, and 4 V battery). So, the display backlight alone can drain an 1,100 mAh battery in 9.9 hours if driven at maximum intensity all of the time. The display does not have to be illuminated at maximum backlight intensity under all conditions, allowing significant power to be saved in lower light environments, such as offices, movie theaters and outdoors at night. Sunny day luminance can vary from 32,000 to 100,000 lux, two orders of magnitude greater than a 400 lux brightly lit office, so cutting the backlight intensity by half, or even more, when going from outside to inside will not cause any loss of display usability or readability. Most people spend an average of 60 percent of their time in an office, so this cutback in backlight brightness will reduce current drain by approximately 50 percent or more. The backlight power consumption in the previous example will go from 111 mA to 55.5 mA. Using ALS, the same display will last 19.8 hours on an 1,100 mAh battery. Content Adaptive Backlight Control (cABC) Content Adaptive Backlight Control (cABC), shown in Figure 2, is a method that analyzes display content and adjusts the display backlight based on the grayscale content of the image and gamma correction techniques. The display driver outputs a PWM waveform to the backlight driver, with varying duty cycle based on video grayscale content and gamma correction. Backlight is reduced for dark images. This reduces backlight power consumption and enhances display contrast while maintaining vivid display quality. This method is particularly useful in video playback where scenes can change from bright to dark for extended time periods. The cABC can also reduce current drain for still images and standard menu screens. The user interface on the mobile product can be tailored to take advantage of these savings. Depending on image data, cABC can reduce display power by 20 percent to 50 percent. When combined with ALS, power saving can exceed 70 percent. IC manufacturers are already designing ICs to take advantage of the combined power saving of ALS and cABC. No ALS

Daylight (ALS)

Office (ALS)

Dark (ALS)

Display BL

111 mA

111 mA

56 mA

24 mA

KP BL

30 mA

0 mA

0 mA

30 mA

Total Current

141 mA

111 mA

56 mA

54mA

Total Saving

0%

21%

61%

62%

Table 1. ALS impact on backlight current drain in different light environment

Keypad Backlight In addition to display backlight, ALS can also save power on keypad backlight. Most keypads have a visible silkscreen, which requires no backlighting when there is ambient light available. An average size keypad backlight based on LED or electroluminescent lamp (EL) technology draws about 30 mA from the battery. Without ALS, the keypad needs to be backlit at all times, which wastes a lot of energy. With ALS, the backlight driver can turn off or dim the keypad backlight, saving hundreds of mAh. Backlight drivers with integrated ALS control provide interrupt notifications between light changes, allowing the processor to make changes in keypad or other peripheral lighting. On a device that can play seven hours of video with an 1,100 mAh battery, 111 mA display backlight current drain represents 70 percent of the total current consumption in video mode. Cutting down display backlight current drain by half, with ALS implementation, will increase video play time from 7 hours to 10.8 hours. Table 1 illustrates power savings with ALS in different lighting environments. The display and keypad backlight in the previ-

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Figure 2. Content Adaptive Backlight Control (cABC)

ous examples draw a total of 141 mA at full power. In daylight, the keypad can be turned off completely, which can save 21 percent in backlight current. The real current drain saving is in office and dark environments. Display backlight current can easily be cut back by 50 percent without significant display quality degradation, and again no keypad backlight is necessary to view the keypad. With ALS implementation, current drain for both backlights can be cut down by 61 percent. Remaining conservative with the keypad backlight and keeping it on at full current in dark environment, while cutting the display backlight to 24 mA, translates to a 62 percent saving. GPIO/Keypad Expander With designers fighting to get every milliamp-hour out of the battery, it has become critical to look everywhere for power savings. In recent times, text messaging has increased 100 fold. Teenagers text their friends and loved ones more than they talk on their mobile phones. Though not be as significant as the power consumption of the backlight, every single keystroke can wake up the application processor, draining hundreds of milliamps for a few milliseconds. Thousand of keystrokes a day can quickly add up, deplete the battery capacity by tens of milliamp-hours. To increase processor bandwidth and minimize processor current drain, handsets designers are relying on keypad expanders to handle the keypad in QWERTY cell phones designs. Keypad expanders process all the key strokes, saving processor bandwidth and current drain. Features like key lock capability and light sensor decoding are also integrated in the IC, helping to save additional bandwidth and current drain. Demands for larger, higher resolution color displays will continue to rise in the years to come. Devices equipped with cABC, ALS and other current saving techniques are allowing consumers to watch videos, browse the web and send text messages with vivid display quality, all while keeping backlight power consumption in check. Continuing to find ways to curtail backlight power consumption will be a challenge, but new methods are being developed to address the high power consumption areas of displays and processors. Using ALS, cABC, GPIO/keypad expanders, and other innovative power reduction techniques will enable manufacturers to provide the media rich devices craved by today’s consumers without compromising multimedia features or extended battery life.

Antony Christian is a system applications engineer at Analog Devices. He has been developing power management ICs for multimedia devices for more than two years. At Analog Devices, Antony works extensively on power management solutions specifically targeted for portable applications. Antony holds a Bachelor of Science degree in Electrical Engineering from Florida International University (FIU). Antony can be reached at [email protected].

August/September 2009 | LED Journal 33

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By Oliver Nachbaur, System Engineering Manager, Display Power • Texas Instruments

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OLED Display Technology Capabilities: Does the power supply impact display picture quality? The organic light emitting diode (OLED) display is becoming more and more popular especially for mobile phones, media player and small entry level TVs. Contrary to a standard liquid crystal display, the OLED pixel is driven by a current source. To understand how and why the OLED power supply impacts the display picture quality, it is key to understand the OLED display technology and power supply requirements. This article explains the latest OLED display technology and discusses the main power supply requirements and solutions.

Market Environment All major mobile phone companies now offer one or more models featuring an OLED display. Sony has the first OLED TV in mass production and many other companies show first prototypes. The OLED display offers wide color gamut, contrast ratio, viewing angle and fast response time. This makes the display well suited for multimedia applications. The self-emitting OLED technology doesn’t require a backlight and the power consumption depends on the display content. Power consumption can be much lower compared to an LCD using backlight. With a larger panel size, the superior image quality of an OLED becomes more noticeable. Therefore, more and more OLED panels being used have a display size greater than 3 inches and the ultimate application in the future still might be the TV panel. Another market for the OLED display is certainly the flexible display. Currently, the OLED and electrophoretic display technology look most promising. The electrophoretic or bi-stable display being used for electronic reader applications needs to be improved in color quality. On the other hand, currently OLED display is not ready for mass production when using fully-flexible materials. This depends mainly on the backplane technology.

Backplane Technology Enables Flexible Displays High-resolution color active matrix organic light emitting diode (AMOLED) displays require an active matrix backplane using an active switch to turn each pixel on and off. The LC display (liquid crystal) amorphous silicon process is mature and provides a low-cost active matrix backplane and used for OLEDs as well. Flexible displays companies are working with an organic thin film transistor (OTFT) backplane process. This process also can be used for an OLED display to realize flexible, full color displays. Whether a standard or flexible OLED is being used the same power supply and driving mythology needs to be applied. To understand the OLED technology, capabilities and its interaction with the power supply, a closer look into this technology is given. The OLED display itself is a self-emitting display technology and doesn’t require any backlight. The material for the OLED belongs to the category of organic materials due to its chemical structure.

control the OLED current. In Figure 1, transistor T2 is the pixel control transistor turning each pixel on and off. This is similar to any other active matrix liquid crystal display topology. A T1 is used as a current source, and the current is given by its gate source voltage. The storage capacitor is Cs, which holds the gate voltage of T1 stable and clamps the current until the pixel is addressed again. The simple single transistor current source in Figure 1 has a major cost advantage since only two transistors are required. The disadvantage of the simple circuit is a variation in current depending on process variations and voltage variation of Vdd. The OLED power supply circuit usually provides two voltage rails: Vdd and Vss. The voltage rail, Vdd, needs to have very tight regulation Figure 1. Simple active matrix OLED pixel (ITO – Indimum thin oxide) to achieve best picture quality and to avoid image flicker. The voltage regulation accuracy of Vss, which usually is a negative voltage, can be less accurate since it has a minor effect on the LED current. The effect of voltage fluctuations on Vdd to the OLED display is shown in Figure 2. As the voltage supply Vdd changes, OLED brightness changes as well. Any superimposed voltage ripple on Vdd, can cause horizontal bars on the image due to different brightness levels. Depending on the display, a voltage ripple larger than 20 mV already can cause such a phenomena. The visibility of the horizontal bars depends on amplitude and frequency of the superimposed voltage ripple. As soon as the frequency interferes with the frame frequency, the bars appear. Under a normal laboratory environment the superimposed voltage ripple on Vdd is usually smaller than 20 mV. The problem appears as the display and power supply are integrated into a system. As soon as any sub-circuit in the system draws pulsating current from the system

OLED Technology Requires a Current Control Driving Method A simplified circuit, representing one pixel, is shown in Figure 1. The OLED has electrical characteristics very similar to a LED where brightness depends on the LED current. A control circuit, thin film transistors (TFTs) are being used to turn the OLED on and off and to

34 LED Journal | August/September 2009

Figure 2. Voltage fluctuations on the supply rail causing horizontal bars

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feature power supply a voltage ripple appears, common to all circuits connected to the system power supply. Typical sub-circuits drawing pulsating current are the GSM power amplifier in a mobile phone, motor driver, audio power amplifier or similar. In such systems, the system supply rail has a superimposed voltage ripple. If the AMOLED power supply doesn’t reject this ripple, it will appear on its output as well, causing the discussed visible image distortion. To avoid this, the AMOLED power supply needs to have a very high-power supply rejection ration and line transient response. For the AMOLED power supply, a boost converter is required for the positive voltage rail, Vdd and a buck-boost or inverter for the negative voltage rail, Vss. This puts the challenge to the IC manufacturer providing a suitable power supply IC providing a very accurate positive voltage rail, Vdd and negative voltage rail, Vss, achieving minimum component height and smallest solution size. To meet all these requirements a novel power supply topology is chosen to provide both positive and negative output voltage rails from a LithiumIon (Li-Ion) battery using just a single inductor.

SIMO Regulator Technology Enables Best-in-Class Picture Quality Figure 3 shows the typical application circuit using the TPS65136, offered by Texas Instruments, device with single-inductor multiple-output (SIMO) regulator technology. The device operates with a four-switch buck-boost converter topology. SIMO technology features best-in-class line transient regulation, buck-boost mode for both outputs and highest efficiency over the entire load current range.

minimized and the minimum switching frequency is controlled to be outside the audio range of typically 40 kHz. This avoids possible audible noise caused by ceramic input or output capacitors. This is especially important when using the device in a mobile phone application and simplifies the design process. Since OLED display technology is just emerging, there is still a lot of room to conserve power, increase OLED efficiency and minimize the total solution size. As OLED becomes more mature, it is also possible to use OLED for architectural lighting or as backlight for LCDs. Both opportunities allow lower power consumption and higher design flexibility compared to traditional lighting solutions. For OLED technology, the future seems to be very bright.

References To download a datasheet on the TPS65136 with SIMO technology, visit: www.ti.com/tps65136-ca. Oliver Nachbaur is a member of the Technical Staff at Texas Instruments in Germany where he is a System Engineering Manager for the Display Power Converter group. Oliver has more than a decade of experience in the semiconductor industry working as an applications engineer and system engineer on Power Management Products. Oliver received a degree in Electrical Engineering in Ravensburg, Germany. He can be reached at [email protected].

Figure 3. TPS65136 Buck-Boost Converter topology supporting dual output

Advanced Power Save Mode Enables High Efficiency As with any battery-powered equipment, long battery standby time is only achieved when the converter operates at highest efficiency over the entire load current range. This is especially important for an OLED display. The OLED display consumes its maximum power when the display is fully white and much lower current for any other display color. This is because only the white color requires all the sub-pixels red, green and blue to be fully turned on. For example, a 2.7-inch display requires 80 mA current for a fully white picture and only 5 mA current when icons or graphics are displayed. Therefore, the OLED power supply needs to provide high converter efficiency at all load currents. This is achieved by using an advanced power save mode technology reducing the converter switching frequency as the load current decreases. Since this is done using a voltage controlled oscillator (VCO), possible EMI problems are

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August/September 2009 | LED Journal 35

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By Gavin Hesse, Product Marketing Engineer • Cypress Semiconductor

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Integrating Power, Control Offers Flexibility Simplicity for Lighting Applications In uncertain economic times, the message given to design engineers is clear: save money. In LED lighting designs, that message needs to be even clearer, as the LEDs themselves take up a large portion of the bill-of-materials (BOM). A new device to the market helps provide a necessary cost-down solution, PowerPSoC, an embedded power controller. PowerPSoC provides an unprecedented level of integration for customers, containing four channels of internal current sense amplifiers rated at 6 MHz, four 2 MHz hysteretic controllers independently configurable as buck, boost or buck-boost and four low-side n-FETs rated at 1 A, 32 V each. Not to be content with only the output stage, PowerPSoC also includes a 32 V internal input regulator. The simple advantage this supplies to lighting customers is cost. In Figure 1, we see a standard lighting design. The figure can appear somewhat intimidating and complex but can actually be condensed to three simple sections. First off, everything electronic requires some form of regulation off the 12 V to 32 V line. Secondly, the LED strings require a regulated current provided by a controller IC. Finally, an intelligent controller will provide dimming and communication, as well as any other additional feature needed in the system. In PowerPSoC, the regulation, current control and intelligent controller are all combined into one semiconductor device. To fully grasp the integration potential, the picture needs to be expanded from one channel of LED control to four. Many LED fixtures require multiple channels to intelligently modify color, correlated color temperature and intensity. Figure 2 shows a four channel system. In the system above, we see the need for one constant current control loop per LED channel, so although only one intelligent controller is necessary, additional cost is incurred. PowerPSoC fully integrates these additional constant current controllers, shown in the highlighted section of Figure 3. The integration potential of PowerPSoC is readily apparent. Virtually the entire four channel LED system is collapsed into the one device. Since each of these constant current channels can cost multiple dollars, the BOM savings can be significant. Cost isn’t the only advantage. Flexibility from a design standpoint is what comes from utilizing an embedded controller over discrete options. For example, the internal hysteretic controllers have adjustable settings for the reference voltages, essentially meaning that the constant current for the lighting system can be digitally modified instead of having to change out an external sense resistor. Another example uses dedicated function pins connected to an external temperature sensor such as one shown in Figure 1 to trip the onboard hysteretic controller in case of a thermal runaway condition. Flexibility also means that a lighting engine can be laid out for multiple lighting fixtures, as PowerPSoC is available in pin compatible devices from 1 to 4 channels. This can save multiple hours of engineering redesign effort, and means that base projects can be used in separate application spaces, from white light in office environments to mixed color entertainment downlights. Acknowledging that many lighting designers are new to the semiconductor market, PowerPSoC was created to be a simple device to use. For one channel of power control, PowerPSoC takes three PSoC Designer

36 LED Journal | August/September 2009

Figure 1. Standard, Single-Channel Lighting Design

Figure 2. Standard 4-Channel Lighting Design

Figure 3. 4-channel Lighting Design with PowerPSoC. A single PowerPSoC device integrates all the devices within the shaded area.

user modules (pre-configured, pre-characterized blocks of code to simplify implementation of common functions) and three lines of “C” code. Shown below in Figure 4 is the PSoC Designer layout for PowerPSoC. The power section is laid out in an intuitive way for engineers who are familiar with constant current feedback loops.

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feature User Modules are preconfigured blocks of code that include APIs and register settings. To set up the first user module required for a power channel, an engineer must drag and drop a current sense amplifier onto the required placement shown above. The current sense amplifier has some adjustable settings, most notably the gain settings, another way of independently modifying the con- Figure 4. Intuitive design software interface stant current of the system. The second user module is the Modulator, another feature of PowerPSoC compared to other devices, most of which only offer a small number of hardware eight to 10 bit PWMs. PowerPSoC offers four hardware 16-bit dimmers, which can be configured as either a PWM or two other options, the first being the PrISM spread spectrum signal, which reduces radiated EMI in a lighting system by up to 70 dB, and the second being the Hardware Density Modulated PWM (DMM), a 12-bit dithered PWM. The final user module is the Hysteretic Controller, which connects to the current amplifer and modulator, as well as the internal n-FET. These are what can then be configurable for buck, boost or buck-boost applications. The “C” code necessary? Three Start commands. Outside of the power channels discussed and shown above, PowerPSoC includes additional digital and analog resources for functions such as digital communication protocols such as DMX512 and DALI, and user inter-

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Figure 5. Only three lines of C code are necessary to turn on an LED channel.

faces such as Cypress’s CapSense touch control technology. Between saving customers costs on their bill-of-materials, providing greater design flexibility, and even allowing for additional functionality, PowerPSoC is a strong new entry into the burgeoning lighting market. It can be the brains and brawn of a light engine, handling the communication, dimming, input voltage and constant current control. As lighting designers continue to work on how to utilize the potential of LEDs, PowerPSoC is well suited for the creative and cost conscious.

Gavin Hesse received his BSEE from Seattle Pacific University and is now a product marketing engineer for Cypress Semiconductor. For the past few years, he has been focused on intelligent lighting solutions, including Cypress’s PowerPSOC embedded power controller. Gavin can be contacted at [email protected].

August/September 2009 | LED Journal 37

industry news Martin, Lighting Science Sign Distribution Agreement Lighting Science Group Corp. (Lighting Science), a developer and integrator of intelligent LED lighting solutions and Martin Professional A/S, a provider of dynamic lighting systems, have signed a distribution agreement that will give Martin access to Lighting Science’s X16 DOTZ LED strings for global distribution. The X16 DOTZ LED string has been well-received in the market since its introduction and will be marketed under the name FlexDOT in Martin’s line of LED video products. FlexDOT has already been used in multiple projects across the lighting market. FlexDOT is a string of bright (RGB) LEDs designed for a variety of lighting applications including video and other entertainment displays. Leveraging the DMX512 lighting control protocol, each LED capsule on the string produces a wide color palette of millions of hues. This allows the user to create a personalized interactive experience through color control, special effects and animation of each light point.

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Labsphere, Orb Optronix Announce Collaboration Light measurement companies Labsphere and Orb Optronix have announced a far-reaching collaboration to encompass product development,

manufacturing and distribution. Under the new agreement, select Orb Optronix LED test instrumentation will be manufactured at Labsphere’s New Hampshire facility. The two companies will cooperate on the development of a broad range of new LED, display and light metrology products. Orb Optronix also plans to expand its LED measurement services laboratory with the addition of several Labsphere systems. In addition, the companies will now share sales channels. Orb Optronix’s LED characterization systems and software will be sold through Labsphere’s worldwide sales organization while Labsphere products will be available through Orb Optronix’s US distribution network. Juiceworks’ New LED Products JuiceWorks LLC has released the Sea Gull Lighting LED surface mount downlights, including a retrofit version for converting recessed lighting to LED. The Sea Gull Lighting LED downlights are low-profile, surface mount alternatives to traditional recessed and other types of ceiling lights. They are powered by JuiceWorks and are offered with two color temperatures (3,000 K and 4,500 K) both 80 CRI, 15 W, smooth dimming to 10 percent, 35,000 hours unit life, nearly 7 foot candles at 8 feet , 600 lumens (3,000 K temp), and a 60° beam angle, similar to standard flood lamps.

US Coast Guard Stocks Up on Solar-LED Marine Lanterns The United States Coast Guard (USCG) has placed an order for hundreds of solar-LED marine lanterns from Carmanah Technologies. Valued at approximately $600,000, this latest shipment of 701-5 and 704-5 lanterns will replace older incandescent lanterns throughout the region, while providing an additional level of safety and security for marine traffic and Gulf Coast communities during the hurricane season. LED Lighting Trial Delivers 75 Percent Saving on Energy SafeSite LED lighting by Dialight has been installed by Henkel, manufacturer of Loctite and a producer of adhesives, sealants and surface treatments, at its waste water treatment plant in Puerto Rico. This installation is the first of a series of LED trials. Henkel was able to save on power consumption and achieve a more efficient lighting system by using 12 of Dialight’s 100 W SafeSite LED fixtures to replace 16 of the existing 250 W HPS fittings that are used to light the tank and walkways. The result is that energy needs are reduced by 75 percent and improved quality of illumination. On these light fittings alone this amounts to an annual energy saving worth almost $3,500.

calendar of events American Bright Optoelectronics. . . . . . . . . . . . . . . . . . . . . . .13, 22 www.americanbrightled.com ElectraLED, Inc. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 www.electraled.com Kenall. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15, 24 www.kenall.com Intertech Pira . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 www.ledsconference.com LightShow/West. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 www.lightshowwest.com Monolithic Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25, 39 www.monolithicpower.com PerkinElmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7, 26 www.perkinelmer.com/ledsolutions Photon Engineering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 www.photonengr.com Semicon West . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 www.semiconwest.org Seoul Semiconductor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40 www.acriche.com Signcomplex Ltd . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11, 27 www.signcomplex.com SPIE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 www.spie.org/pw Virginia Optoelectronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2, 28 www.vaopto.com

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| August/September 2009

August 2009 8/2 - 8/6 SPIE Optics + Photonics 2009 San Diego, CA

September 2009 9/6 -9/9 China International Optoelectronic Exposition Shenzhen Convention & Exhibition Center, China 9/13 - 9/16 28th Annual Street and Area Lighting Conference Philadelphia, PA 9/14 - 9/17 Eurodisplay 2009 Rome, Italy

October 2009 10/19 - 10/20 SSLdesign Summit 2009 Los Angeles, CA 10/20 - 10/22 LEDs 2009 San Diego, CA

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