Polarized synthesization in projection type liquid crystal displ

Details Polarized synthesization in projection type liquid crystal displ Polarized synthesization in projection type liquid crystal displ

1990-10-05

1993-04-06

Hille, Rolf

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 63, 359 70, 353 20, 353 81, 353 98, G02F 113

Patent

active

052008436

ABSTRACT:
A projection type liquid crystal display (LCD) system having a light source, a light separation device for separating light from the light source into color components, a liquid crystal light valve for modulating light from the light separation device, a light synthesizing device for synthesizing the modulated light from the liquid crystal light valve, and a projection lens for projecting light from the light synthesizing device. A polarizing beam splitter is arranged in the optical path between the light source and the light separation device to separate the incident light into two polarized light components having perpendicular polarization directions relative to each other and a polarizing conversion device converts the separated polarized light components to have the same polarization direction and transmits them from the conversion device in spatial parallel relation to the liquid crystal light valve.

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M. Imai et al., "Polarization Converter for Very Bright Projection Optics System of Liquid Crystal Projector", Institute of Electronics, Information and Communication Engineers, 1989 Autumn National Convention Record, pp. 5-34, Sep., 1989 (Electronics).

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