Active matrix liquid crystal display element and projection type

Details Active matrix liquid crystal display element and projection type Active matrix liquid crystal display element and projection type

1989-09-27

1992-09-22

James, Andrew J.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 53, 359 81, 359 94, G02F 113

Patent

active

051502321

ABSTRACT:
An active matrix liquid crystal display element and a projection type active matrix liquid crystal display device by which a display can be obtained which is good in color balance and high in brightness and also in contrast ratio. The display element includes a liquid crystal material held between an active matrix substrate and a counter electrode substrate. The liquid crystal material is formed from a liquid crystal polymer composite wherein nematic liquid is contained dispersively in a polymer matrix having a refractive index which coincides with the ordinary refractive index of the liquid crystal used, and a silicon thin film transistor is used as an active element on the active matrix substrate. The display device includes such an active matrix liquid crystal display element, a light source for projection light, and an optical system of projection.

REFERENCES:
patent: 4435047 (1984-03-01), Fergason
patent: 4662720 (1987-05-01), Fergason
patent: 4678282 (1987-07-01), Yaniv et al.
patent: 4818070 (1989-04-01), Gunjima et al.
patent: 4834509 (1989-05-01), Gunjima et al.
"Low-Loss High-Intensity Color Projection" K. Pirs et al, SID International Symposium-Digest of Technical Papers, vol. 9.
SID INTERNATIONAL SYMPOSIUM-DIGEST OF TECHNICAL PAPERS, vol. 9, Anaheim, CA; May 24-25, 1988, pp. 227-230, SID; J. Pirs et al.: "Low-Loss high-intensity order projection".
Patent Abstracts of Japan, vol. 12, No. 140, p. 696, Apr. 28, 1988; & JP-A-62 262 027 (SEIKO EPSON CORP.); Nov. 14, 1987.

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