Liquid crystal cells – elements and systems – Particular structure – Holder – support – frame – or housing
Patent
1993-03-31
1997-01-14
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Holder, support, frame, or housing
385901, 353 74, 349 62, 349 96, 349112, 349137, 349159, G02F 11335, G02B 502, G03B 2100
Patent
active
055945619
ABSTRACT:
A flat panel liquid crystal display module (34) has its front face adjacent a rear projection screen (40) and is illuminated by a pre-polarized collimated light source (10,14,16,18,22,26). Collimation is provided by either a Fresnel lens or a projection lens having a long focal length. The characteristics of the projection screen (40) provide narrowed vertical viewing angle and a fiber optic face plate (38) between the liquid crystal module (34) and the screen (40) provides sunlight rejection. The arrangement has greatly improved display brightness, with only minimal changes in contrast and color as viewing angle changes.
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Brown Rodney F.
Duong Tai V.
Palomar Technologies Corporation
Sikes William L.
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