Planar LC12 User Manual
Title: Product Specification: LC12 High-Bright Monitor
Page 23 of 24
Document Number: 023-0284-01
Revision: A
CIE: Abbreviation for the Commission Internationale de l'Eclairage, formerly referred to as the
International Commission on Illumination (ICI).
International Commission on Illumination (ICI).
Chrominance: The colormetric difference (dominant wavelength and purity) between any color and a
reference "white" of equal luminance. In three-dimensional CIE color space, chrominance is a vector
which lies in a plane of constant luminance.
reference "white" of equal luminance. In three-dimensional CIE color space, chrominance is a vector
which lies in a plane of constant luminance.
Chromaticity: The color quality of light which is defined by its dominant wavelength and purity (see
Chrominance).
Chrominance).
Chromaticity Value: The scalar value of any one component of a three-component color (also called a
tristimulus value). The unit value of each component is the amount of that component added to the
other two components to produce a reference "white".
tristimulus value). The unit value of each component is the amount of that component added to the
other two components to produce a reference "white".
Color Data: The programmed values which determine the amplitudes of the signal which drive a color
display.
display.
Color Saturation: A psycho-physiological measurement of the degree to which a color appears to be
free of white light.
free of white light.
Color Temperature: The temperature to which a black body must be heated to produce a color
matching that of the source.
matching that of the source.
Contrast: The ratio between the maximum and minimum luminance values of a display.
dB (Decibel): A measure of the ratio of two signals. The dB value is 20 x log
10
of a voltage or current ratio
or 10 x log
10
of a power ratio.
Foot-Candle [fC]: A unit of illumination equal to the illumination which occurs when uniformly
distributed luminous flux is impinging on an area at a rate of one lumen per square foot.
distributed luminous flux is impinging on an area at a rate of one lumen per square foot.
Foot-Lambert [fL]: A unit of luminance equal to the uniform luminance of a perfectly diffusing surface
emitting or reflecting luminance flux at the rate of one lumen per square foot.
emitting or reflecting luminance flux at the rate of one lumen per square foot.
Front Porch: The portion of a composite display signal which lies between the leading edges of a
horizontal blanking pulse and the corresponding sync pulse.
horizontal blanking pulse and the corresponding sync pulse.
Gray Scale: Variations in the luminance value of "white" light, from black to white. Shades of gray are
defined as gray-scale graduations that differ by the square root of 2.
defined as gray-scale graduations that differ by the square root of 2.
Illuminance: The density of luminance flux impinging on a surface. It is the quotient of the flux divided
by the "apparent" or projected area of the surface.
by the "apparent" or projected area of the surface.
Image: A displayed view of one or more objects or parts of objects.
Lambert: A unit of luminance equal to the uniform luminance of a perfectly diffusing surface emitting or
reflecting light at the rate of one lumen per square centimeter.
reflecting light at the rate of one lumen per square centimeter.
Luminance: Luminous intensity reflected or emitted by a surface in a given direction per unit of apparent
area. Measured in nits.
area. Measured in nits.
Lumen: The unit of luminous flux or rate of luminous energy flow. It is equal to the flux radiating
through a unit solid angle (steradian) from a uniform point source of one candela.
through a unit solid angle (steradian) from a uniform point source of one candela.
Luminous Flux: The time rate of luminous energy flow, measured by its capacity to evoke a visual
sensation. It is expressed in lumens.
sensation. It is expressed in lumens.
Luminous Intensity: The luminous flux radiated by a point source. It is expressed in candela.
LUX: The international unit of illumination. One LUX equals one lumen per square meter.
MTBCF: Mean Time Between Critical Failure
Photometer???Any optical device which uses a comparison technique to measure luminous intensity,
luminance, or illumination. An equality-of-brightness photometer is based on simultaneous comparison
of adjoining visual areas; a flicker photometer compares successive stimuli in the same visual area.
luminance, or illumination. An equality-of-brightness photometer is based on simultaneous comparison
of adjoining visual areas; a flicker photometer compares successive stimuli in the same visual area.
Resolution: The number of addressable, controllable display or picture elements, or the number of
hypothetical coordinate locations which can be used to position graphic elements on a display surface.
hypothetical coordinate locations which can be used to position graphic elements on a display surface.
Shades of Gray: A division of the gray scale from black to white into a series of discrete luminance
shades with a square-root-of-2 difference between successive shades.
shades with a square-root-of-2 difference between successive shades.