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GLOSSARY
Checkbox
Color Shift
Color Temperature
Component Video
Composite Video
Contrast (ratio)
Convergence
Curved Screen
DDI
DMD
Decoder
Detail
Diffused Screen
Display Setting
Flicker
Frame Rate
Foot-candle
Foot-lambert
Gain or Screen Gain
A menu item that indicates whether an option is currently in effect (checked) or
not (unchecked).
A change in the color of a white field across an image (white field uniformity).
The coloration (reddish, white, bluish, greenish, etc.) of white in an image,
measured using the Kelvin (degrees K) temperature scale. Higher temperatures
appear bluer, while lower color temperatures appear redder.
See YCbCr or YPbPr.
The output of video tape players and some computers, characterized by synchro-
nization, luminance and color signals combined on one output cable.
The degree of difference between the lightest and darkest areas of the image.
The alignment of the red, green, and blue elements of a projected image.
A projection screen which is slightly concave for improved screen gain. Curved
screens usually have screen gains which are greater than 1 but viewing angles
much less than 180°. Curved screens are not recommended for use with this pro-
jector.
A Direct Digital Interface signal can be supplied to the projector via an optional
digital input module installed in INPUT 2. For example, you can input an
SMPTE-259M signal using a Serial Digital Input Module or input an SMPTE-
272M signal from a HDTV Serial Input Module.
Digital Micromirror Devices used in this projector for processing red, green,
and blue color data.
Located at INPUT 3 and INPUT 4, this device converts NTSC 3.58, NTSC 4.4,
PAL, PAL-N, PAL-M, or SECAM to RGB video.
The sharpness of a display from a video source.
A type of rear-projection screen which spreads the light striking it. Screen gain is
less than 1 but audience viewing angles are increased.
An adjustment that affects the display of an image. Such display settings include
contrast, brightness, tint, blanking, size, offsets, and others.
A very rapid variation in image brightness caused by a frame rate that is too
slow. (See Interlace.)
The frequency at which complete images are generated. For non-interlaced sig-
nals, the frame rate is identical to the vertical frequency. For interlaced signals,
the frame rate (also known as field rate) is one half of vertical frequency.
The intensity of visible light per square foot.
The luminance (brightness) which results from one foot-candle of illumination
falling on a perfectly diffuse surface.
The ability of a screen to direct incident light to an audience. A flat matte white
wall has a gain of approximately 1. Screens with gain less than 1 attenuate inci-
dent light; screens with gain more than 1 direct more incident light to the audi-
ence but have a narrow viewing angle. For example: An image reflecting off a
A-2
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