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Glossary
themselves to manufacture one or more products capable of going into a low -power state (< 30 W) either after a period
of inactivity, or after a predetermined time selected by the user.
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G
Gamma
Screen luminance as a function of video voltage approximately follows a mathematical power function of the input video
signal, the exponent of which is called gamma.
Grayscale
An achromatic scale ranging from black through a series of successively lighter grays to white. Such a series may be
made up of steps, which appear to be equally distant from one another. If the Analog/ Digital converter is 8 bit, then the
monitor can display at most 2
8
= 256 levels. For a color monitor, R.G.B. each color hads 256 levels. Thus, total color can
display is 256x256x256= 16.7 million.
H
Hue
The main attribute of a color that distinguishes it from other colors. For example, a color may have a green, yellow, or
purple hue. Color defined as having hue are know as chromatic colors. White, black, and grays possess no hue.
I
IPS (In Plane Switching)
A technique of improving the viewing angle of an LCD where the liquid crystal molecules are switched in the plane of the
LCD layer rather than vertical to it.
file:///G|/TEMP/PHILIPS/190S9 EDFU/lcd/manual/ENGLISH/190S9/glossary/glossary.htm（第 4／10 页）2008-5-24 9:56:42
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