LCD projection system which aligns the larger beam spread angle

Details LCD projection system which aligns the larger beam spread angle LCD projection system which aligns the larger beam spread angle

1994-07-06

1995-11-14

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 48, 359 49, 353 31, 353 38, G02F 11335, G03B 2100, G03B 2114

Patent

active

054672074

ABSTRACT:
A projection system comprising a liquid crystal light valve having a wider acceptance angle for incident light in a first direction than in a second direction transverse to the first direction and an illumination system. The illumination system provides light to the liquid crystal light valve at a greater beam spread angle in the first direction than in the second direction. The system also includes projection optics for receiving light from the liquid crystal light valve and projecting such light toward a projection surface.

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"Characterizations of Viewing-Angle-Dependent Colorimertric and Photometric Performance of Color LCDs", SID 93 Digest, T. G. Fiske et al., 1993, pp. 565-568.
"A High-Light-Output Active-Matrix TN-LC Projector for Video and Data-Graphics Applications", SID 93 Digest. P. Candry et al., pp. 291-294.
"A Compact LCD Rear Projector Using a New Bent-Lens Optical System", SID 93 Digest, S. Shikama et al., 1993, pp. 295-298.

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