Liquid crystal image projector system
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United States of America Patent
Stats
-
Apr 1, 1980
Grant Date -
N/A
app pub date -
May 5, 1978
filing date -
May 5, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is disclosed a liquid crystal image projector which is suitable for use as an image source in an aircraft head-up display system. In this application, the projector provides extremely bright and high contrast symbology for the aircraft pilot. More generally, the projector has application wherever a television-type raster and/or calligraphic symbology display is needed. The increase in brightness and contrast ratio is achieved by using a reflector to concentrate light from a light source onto the liquid crystal display cell from whence it is reflected through an optical aperture stop in the reflector to the projecting lens and thence to a viewing surface.
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Family
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Cited Art Landscape
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