Glossary - NEC KT-X46UN User Manual

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Glossary

Achromatic Neutral in color (having no hue).
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Additive Primaries Red, green, and blue light that when combined in different relative inten-
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sities produces different colors. (See also Subtractive Primaries)
Backlight – the internal light source for a Liquid Crystal Display, such as fluorescent lamps or
array of LEDs (Light Emitting Diodes).
Blackbody A hypothetical object that absorbs all incident radiation, thus any radiation (e.g.
–
light) coming from a blackbody must be emitted from it and not reflected.
Blackbody Radiator Locus – The curve formed when the color of light radiated from a black-
body is plotted at different temperatures on a color space such as CIE xyY.
Black Level – The luminance or "brightness" of black when displayed on the screen.
Calibration – The process of bringing a device such as a display monitor to an absolute stan-
dard to ensure consistency over time and with other similarly calibrated devices.
Candelas (cd) – An international unit of light intensity. Luminance can be described in units of
Candelas per meter squared (cd/m ) but is often referred to as just Candelas or Nits for sake of
²
brevity.
CCFL – Cold cathode fluorescent lamp used for the backlight on LCD display panels.
CIE – The Commission Internationale d'Eclairage (International Commission on Illumination).
An organization that sets many of the standards used in color and color measurement.
CIE uv chromaticity coordinates – Coordinates in the CIE uv color space which are derived
directly from CIE xyY color space. CIE uv is more perceptually uniform than CIE xy.
CIE xy chromaticity coordinates – Coordinates in the CIE xyY color space representing color
independent of luminance.
CIE xyY – A standard color space in which the Y component represents luminance. The x and
y components represent color.
Color Gamut – (See Gamut)
Colorimeter – An optical measurement device used to measure color that responds to light by
separating it into red, green, and blue components.
Color Temperature The color of light given off by an object, known as a blackbody, as it is
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heated to a given temperature in degrees Kelvin. Low color temperatures such as 5000K are
reddish, whilst higher color temperatures such as 9300K are bluish. A color temperature of
6500K is considered to be "neutral" white.
COM Port – The original name of the serial port interface on IBM PC-compatible computers.