Projection type color liquid crystal optical apparatus

Details Projection type color liquid crystal optical apparatus Projection type color liquid crystal optical apparatus

1997-02-27

1998-05-19

Sikes, William L.

Liquid crystal cells, elements and systems

Liquid crystal system

Projector including liquid crystal cell

349 8, 349139, 349 57, 349 62, G02F 11335, H04N 931

Patent

active

057542600

ABSTRACT:
A light source optical system for projection 1, dichroic mirrors 21, 22 disposed to have a predetermined included angle .beta., a reflection type liquid crystal optical element blocks 31-33 each including a closely contacted converging lens and having a reflection surface and a projection optical system 4 are provided, wherein the normal line of a dichroic mirror surface and the optical axis of incident light form an included angle .alpha.; the normal line of the reflection surface and the optical axis of incident light form an included angle .gamma.; light emitted from a light source is color-separated so as to become color lights; the color lights are rendered to be parallel light beams, and are modulated and reflected by means of the reflection type liquid crystal optical elements; the reflected light beams are color-synthesized; and the color-synthesized light is projected through a projection lens. A projection type color liquid crystal optical apparatus having a compact shape and a high brightness is obtainable.

REFERENCES:
patent: 4613027 (1986-09-01), Fergason
patent: 4818070 (1989-04-01), Gunjima et al.
patent: 4834509 (1989-05-01), Gunjima et al.
patent: 5103327 (1992-04-01), Hirai et al.
patent: 5162934 (1992-11-01), Gunjima et al.
patent: 5196952 (1993-03-01), Hirai et al.
patent: 5216531 (1993-06-01), Hirai et al.
patent: 5235445 (1993-08-01), Hirai et al.
patent: 5274480 (1993-12-01), Hirai et al.
patent: 5299289 (1994-03-01), Omae et al.
patent: 5379083 (1995-01-01), Tomita
patent: 5379135 (1995-01-01), Nakagaki et al.
patent: 5398081 (1995-03-01), Jones
patent: 5451103 (1995-09-01), Hatanaka et al.
patent: 5477351 (1995-12-01), Takahara et al.
Applied Optics, Jul. 10, 1992, vol. 31, No. 20, Cardinal Warde, et al., "Charge-Transfer-Platee Spatial Light Modulators", pp. 3971-3979.
1989 Autumn Meeting of Electronics, Information and Communication Academy, "Reflective Type High Density TFT Array for High Definition Liquid Crystal Projection TV", pp. 5-30.
Liquid Crystals Applications and Uses, vol. 1, 1990, S.E. Shields, et al., "Light Valve Projection Mode LCDs", pp. 455-467, 488-489.
SPIE vol. 1255 Large-Screen Projection Displays II (1990), R. Gerhard-Multhaupt, et al., "Viscoelastic Spatial Light Modulators and Schlieren-Optical Systems for HDTV Projection Displays", pp. 69-78.

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