Computer Monitors

A detailed Summary of Computer Monitors

The most used output device on a computer is the monitor. The display provides instant feedback by showing text and graphic images. Most desktop computers use cathode ray tube displays. Portable computers use liquid crystal display (LCD). LCD monitors are now beginning to replace CRT's. This is due to a slimmer design and a use of less energy (How Stuff Works).

IBM introduced the Color Graphics Adapter (CGA) in 1981. It was capable of rendering four colors. It had a maximum resolution of 320 pixels horizontally by 200 pixels vertically. In 1984 the Enhanced Graphics Adapter (EGA) was introduced. This allowed 16 different colors. Its resolution was increased to 640x350 pixels. This improved the appearance of the display (PC Tech). The Video Graphics Array (VGA) was introduced in 1987. VGA monitors are still in use today. This

The size of your display is determined by aspect ratio and the screen size. Most displays use an aspect ratio of 4:3 (How Stuff Works). The projection surface of the display is called the screen. Screen sizes are measured from one corner diagonal to the other in inches. Because of being measured diagonal the screen size will actually be a little bit smaller then what is listed (PC Tech). Screen sizes vary and some of the most popular ones are 15, 17, 19, and 21 inches. Notebook computers usually have a screen size of anywhere between 12 and 15 inches. The image will be sharper on a smaller screen is using the same pixel resolution (How Stuff Works).

LCD technology works by blocking light rather then creating it. Light-emitting diode (LED) and gas plasma work by lighting up display screen positions based on the voltages at differe

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Approximate Word count = 569
Approximate Pages = 2 (250 words per page double spaced)

Category: Technology

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