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Proceedings Paper

High-brightness liquid-crystal light-valve projector using a new polarization converter
Author(s): Masao Imai; Mikio Sakamoto; Keiichi Kubota; Yuji Kato; Nobuo Nishida
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Paper Abstract

A high-brightness liquid crystal light valve (LCLV) projector, in which three amorphous Si TFT-addressed LCLVs are used, has been developed for laroe screen displays. By using a newly developed polarization converter, about twice the brightness has been realized compared to using a conventional sheet polarizer. The polarization converter principle is to efficiently convert an unpolarized light from a light source into a linearly polarized light, used to illuminate a twisted nematic LCLV. The LCLV has 240 x 756 pixels in the 4.3 inch diagonal area. High-brightness full-color images with 120 ft-L brightness have been obtained, when projected onto a 5.0 gain 80 inch diagonal screen using a 300W Xenon arc lamp.

Paper Details

Date Published: 1 August 1990
PDF: 7 pages
Proc. SPIE 1255, Large-Screen and Projection Displays II, (1 August 1990); doi: 10.1117/12.19866
Show Author Affiliations
Masao Imai, NEC Corp. (Japan)
Mikio Sakamoto, NEC Corp. (Japan)
Keiichi Kubota, NEC Corp. (Japan)
Yuji Kato, NEC Corp. (Japan)
Nobuo Nishida, NEC Corp. (Japan)


Published in SPIE Proceedings Vol. 1255:
Large-Screen and Projection Displays II

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