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Glossary

Achromatic – Neutral in color (having no hue).

Additive Primaries – Red, green, and blue light that when combined in different relative intensi-

ties produces different colors. (See also Subtractive Primaries)

Backlight – the internal light source for a Liquid Crystal Display, such as uorescent lamps or ar-

ray 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 reected.

Blackbody Radiator Locus – The curve formed when the color of light radiated from a blackbody

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 standard

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/m²) but is often referred to as just Candelas or Nits for sake of

brevity.

CCFL – Cold cathode uorescent 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

heated to a given temperature in degrees Kelvin. Low color temperatures such as 5000K are red-

dish, 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.

Contrast Ratio – The ratio of the white luminance (Intensity) and black luminance (Black Level) of

the display.

Correlated Color Temperature – The closest matching color, expressed in Kelvin, of a white

point that does not lie exactly on the blackbody locus.

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NEC Display Wall Calibrator Guía de usuario Pagina 89