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System of LCD Display
Training Manual Principle of LCD
5-2 Colorization
Since an LCD shutter only passes or blocks light, in itself it cannot display a color picture. The color pic-
ture is made by mixing the three colors of RGB (three primary colors of light) respectively, like the CRT
color television. The color LCD panel has a color filter of RGB attached to the monochrome panel. See
Fig. 13. In this color LCD panel, by controlling the voltages and the waveforms that are supplied at each
RGB pixel, the transparent ratio is controlled and hue and brightness are adjusted. Therefore, smaller
pixels and more numbers of pixels are required for the color LCD Display. For example, although the
SXGA panel described before has about 1,300,000 pixels, in colorization, there are about 4 million dots
(sub-pixels).
Backlight
Backlight
R G
B
Color Filter
LCD Shutter
LCD Shutter
Color Panel
Monochrome Panel
Fig. 13
Colorization of LCD Display
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