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Contrast (ratio) ➤
Convergence ➤
Current Setup ➤
Memory
Curved Screen ➤
Decoder ➤
Diffused ➤
Display Setting ➤
Flicker ➤
Frame Rate ➤
Foot-candle ➤
Foot-lambert ➤
Gain or Screen ➤
Gain
The ratio of brightness of the brightest possible area to the darkest possible
area of an image.
The alignment of the projected red, green and blue images on the
projection screen.
The setup memory which is currently being used to display a given
source's image.
A projection screen which is curved to improve screen gain. Curved screens
usually have screen gains which are greater than 1 but viewing angles much
less than 180°.
A device that converts NTSC, PAL, PAL M, PAL N, PAL 60, SECAM
or NTSC 4.43 video to RGB video (Multi-standard Decoder).
Screen A type of rear-projection screen which spreads the light striking it.
Screen gain is less than 1 but audience viewing angles are increased.
The level of a display adjustment. Some display adjustments are:
Contrast, Brightness, Blanking, Bow, Size, Keystone, Pincushion, Focus
and Convergence.
A rapid variation in brightness created when the frame rate is too slow.
(See also Interlace.)
The frequency at which complete images are generated. For non-interlaced
signals, the frame rate is identical to the vertical frequency. For interlaced
signals, the frame rate is one half of vertical frequency.
The intensity of visible light per square foot.
1 foot-candle = 1 lumen/square foot = 10.76 lux
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
GLOSSARY
A.3
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