Mallik Arjuna

WELCOME TO PRESENTATION By Mallikarjuna

TYP ES OF MON IT0 RS • CRT (cathode ray tube) • LCD (Liquid Crystal Display) • PLASMA SCREEN

CR T CRT or Cathode Ray Tube monitors are the monitors everyone will have seen before. They that look like televisions. They range in size from 15 to around 22 Inch, and

Ad va ntages • Less desk space needed • Require less power to run, more environmentally friendly • Increased Viewable area, a 15"LCD can give the same viewable area as a 17" CRT monitor

Disa dva ntages • Big • Take up a lot of space • Cost more to run than an LCD

LCD/TFT LCD or Liquid Crystal Display screens have now been around a few years, these are the thin screens. Some look almost like a picture frame.

ADVA NTAG ES OF LCD • • • •

Great value for money Mature technology Good for graphical detail Can accommodate many different resolutions

Disa dva ntages • Viewing angle can affect image quality • One native resolution • More expensive than a CRT • General Monitor Features • Size

PLASMA SCREEN Plasma displays are bright have a wide color gamut, and can be produced in fairly large sizes, up to 381 cm (150 inches) diagonally.

Ad va ntages o f pla sm a sc re en • Slim profile • Can be wall mounted • Lighter and less bulky than rearprojection televisions • Achieves better and accurate color reproduction than LCDs

Disa dva ntages • Susceptible to "large area flicker" • Generally do not come in smaller sizes than 32 inches. • Susceptible to reflection glare in bright rooms • Heavier than LCD due to the requirement of a glass screen to hold the gases • Damage to the glass screen can be permanent and far more difficult to repair than an LCD

TYPES OF PRINTERS • DOT MATRIX • LINE PRONTER • DAISY WHEEL

• INKJET • LASER

DOT MATRIX Type of printer that employs movable print heads with pins or wires that shoot and strike the ribbon placing a dot on the paper with hundreds of dots forming images or text.

ADVANTAGES 1)  Can print on multi-part forms or carbon copies 2)  Low printing cost per page 3)  Can be used on continuous form paper, useful for data logging 4)  Reliable, durable

DISADVANTAGES 1)       Noisy 2)       Limited print quality 3)       Low printing speed

Line printer The line print er is a form of high speed impact printer in which one line of type is printed at a time.

ADVANTAGES • It is low cost compare to • It is suitable for small scale business units.

Disadvantages • • • •

Pictures are not printed Noisy Outdated technology Low accuracy.

DAISY WHEEL Daisy wheel printers are very similar to typewriters. The flat, circular pri nte r s printing element contains all text and numeric characters.

Inkjet Printer developed by Canon which forms letters and images on the paper by spraying small streams of quick-drying ink. The ink is stored in a disposable ink cartridge.

Ad va ntages 1)  Low cost 2)  High quality of output, capable of printing fine and smooth details 3)  Capable of printing in vivid color, good for printing pictures 4)  Easy to use 5)  Reasonably fast 6)  Quieter than dot matrix printer 7)   No warm up time

Disa dva ntages 1)       Print head is less durable, prone to clogging and damage 2)       Expensive replacement ink cartridges 3)       Not good for high volume printing 4)       Printing speed is not as fast as laser printers 5)       Ink bleeding, ink carried sideways causing blurred effects on some papers 6)       Aqueous ink is sensitive to water, even a small drop of water can cause blurring

LASER PRINTER Uses the same technology as copy machines. Laser printers produce very high quality text and graphics.

ADVANTAGES 1)     2)     3)     4)    

High resolution High print speed No smearing Low cost per page (compared to inkjet printers) 5)     Printout is not sensitive to water 6)     Good for high volume printing  

DISADVANTAGES     More expensive than inkjet printers      The cost of toner replacement and drum replacement is high    Bulkier than inkjet printers      Warm up time needed

POLTTER A device that draws pictures on paper based on commands from a computer

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