Light valve and display system with a substrate having particula

Details Light valve and display system with a substrate having particula Light valve and display system with a substrate having particula

1996-02-14

1998-01-27

Gross, Anita Pellman

Liquid crystal cells, elements and systems

Liquid crystal system

Projector including liquid crystal cell

349 1, 349 57, 349158, 349137, G02F 11335, G02F 113, G02F 11333

Patent

active

057126933

ABSTRACT:
A light valve includes a light valve layer for forming an optical image as variations in its ability to scatter light, and two substrates between which the light valve layer is sandwiched and at least one of which is transparent. The light valve satisfies the following condition: ##EQU1## where t denotes a central thickness of the at least one of the substrates, n denotes a refractive index of the at least one of the substrates and d denotes a maximum diameter of an effective display area of the light valve layer. Alternatively, a transparent plate can be optically coupled to one of the substrates by a transparent body. In this case, the same condition is satisfied except that the thickness refers to a central thickness from a face of the transparent plate remote from the transparent body to the light valve layer.

REFERENCES:
patent: 4856869 (1989-08-01), Sakata et al.
patent: 5056912 (1991-10-01), Hamada et al.
patent: 5161042 (1992-11-01), Hamada
patent: 5260815 (1993-11-01), Takizawa
patent: 5359440 (1994-10-01), Hamada et al.
patent: 5394254 (1995-02-01), Cheng
Patent Abstracts of Japan, vol. 15, No. 165 (E-1061) Apr. 25, 1991.
J. Pirs et al., "Low-Loss High-Intensity Color Projection", SID International Symposium--Digest of Technical Papers, 1988, Anaheim, CA, pp. 227-230.
Patent Abstracts of Japan, vol. 004, No. 160 (P-035) Nov. 8, 1980.
"Polymer-dispersed liquid crystal devices with curved surfaces", Research Disclosure No. 304, Aug. 1989, New York, pp. 559-561.
Patent Abstracts of Japan, vol. 10, No. 290 (P-503) Oct. 2, 1986.

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