Liquid crystal image projection system

Details Liquid crystal image projection system Liquid crystal image projection system

1989-02-23

1992-03-03

Miller, Stanley D.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

353122, 359 75, 359 54, 359 99, G02F 113

Patent

active

050926640

ABSTRACT:
A liquid crystal image projection system projects an enlargement of an image formed in an active matrix liquid crystal panel onto a screen by using a lamp and a projector lens. The orientation of the liquid crystal panel is made such that a molecular axis vector directed from an input light side end to an output light side end of each liquid crystal molecule in the middle of the liquid crystal layer has a vector component opposite to the scanning direction of the panel, and a convergent light is entered into the liquid crystal panel. The system can solve the problem of nonuniformity of the signal voltage-transmittance characteristic of the entire screen.

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Fergason, "Performance of a Matrix Display Using Surface Mode", IEEE, Oct. 1980, pp. 177-179.
Morozumi et al., LDC Full-Color Video Projector, SID 86 Digest, pp. 375-378.
Morozumi et al., LCD Full Color Video Projects, SID Digest 1986, p. 375.
Ledebuhr, Full Color Single-Projection Lens, etc. SID Digest 1986, p. 379.
Aruga et al., High Resolution Full Color Video Projector, etc., SID Digest 1987, p. 75.

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