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| Understanding Color/Reproducing colors with monitors, printers, and scanners | Index | Home |
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RGB monitor | ||||
Video and computer monitors operate using the three RGB primary colors. | ||||
There are two types of monitors, the CRT (cathode ray tube), which uses the same principles as a television tube, and the liquid crystal display, which is used on laptop computers. | ||||
In a CRT, an electron gun shoots a beam of electrons which is deflected along an axis by a deflection apparatus, and which generates visible light when it strikes the phosphors on the screen. | ||||
The screen is comprised of numerous dots (pixels). A 17-inch display has 1280 x 1024 RGB pixels. A full-color monitor will have 256 levels of each primary color, or 256 x 256 x 256 = 16,700,000 colors (referred to as "full-color"). | ||||
Because the color temperature of a CRT is high, photographs tend to look bluish. However, we soon lose awareness of the bluishness because our eyes naturally adapt to it (chromatic adaptation; see Section 4-1). | ||||
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Compare:Understanding Color/The three primary colors of light | ||||
Compare:Understanding Color/Color reproduction in computer systems | ||||
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