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The light source for a transmissive LCD. There are two techniques used in nowaday LCD designs. Most TFT LCD panels
use CCFLs (cold cathode fluorescent light) and a diffuser panel directly behind the liquid crystal layer. New technology
using Light Emitting Diodes (LED) are still under development.
Brightness
The dimension of color that is referred to an achromatic scale, ranging from black to white, also called lightness or
luminous reflectance. Because of confusion with saturation, the use of this term should be discouraged.
C
CCFL(cold cathode fluorescent light)
These are the fluorescent light tubes providing the light for the LCD module. These tubes are generally very thin,
approximately 2 mm in diameter.
Chromaticity
That part of color specification, which does not involve illuminance. Chromaticity is two-dimensional and specified by pairs
of numbers such as dominant wavelength and purity.
CIE (Commission International de I'Eclairage)
The International Commission on Illumination, the primary international organization concerned with color and color
measurement.
Color temperature
A measurement of the color of light radiated by an object while it is being heated. This measurement is express in terms
of absolute scale, (degrees Kelvin). Lower Kelvin temperatures such as 2400° K are red; higher temperatures such as
9300° K are blue. Neutral temperature is white, at 6504° K. Philips monitors generally offers 9300° K, 6500° K, and user
define.
Contrast
The luminance variation between light and dark areas in an image.
Contrast ratio