GLOSSARY
CheckboxA menu item that indicates whether an option is currently in effect (checked) or
not (unchecked).
Color ShiftA change in the color of a white field across an image (white field uniformity).
Color TemperatureThe coloration (reddish, white, bluish, greenish, etc.) of white in an image, meas-
ured using the Kelvin (degrees K) temperature scale. Higher temperatures appear
bluer, while lower color temperatures appear redder.
Component VideoSee YCbCr or YPbPr.
Composite VideoThe output of video tape players and some computers, characterized by synchro-
nization, luminance and color signals combined on one output cable.
Contrast (ratio)The degree of difference between the lightest and darkest areas of the image.
ConvergenceThe alignment of the red, green, and blue elements of a projected image.
Curved ScreenA 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.
DDIA 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.
DMDDigital Micromirror Devicesused in this projector for processing red, green, and
blue color data.
DecoderLocated 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.
DetailThe sharpness of a display from a video source.
Diffused ScreenA type of rear-projection screen which spreads the light striking it. Screen gain is
less than 1 but audience viewing angles are increased.
Display SettingAn adjustment that affects the display of an image. Such display settings include
contrast, brightness, tint, blanking, size, offsets, and others.
FlickerA very rapid variation in image brightness caused by a frame rate that is too slow.
(See Interlace.)
Frame RateThe 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.
Foot-candleThe intensity of visible light per square foot.
Foot-lambertThe luminance (brightness) which results from one foot-candle of illumination
falling on a perfectly diffuse surface.
Gain or Screen GainThe 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 audience
but have a narrow viewing angle. For example: An image reflecting off a 10 gain
screen appears 10 times brighter than it would if reflected off a matte white wall.
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