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Optical Engineering

Polymer-dispersed liquid crystal light valves for projection display
Author(s): Kuniharu Takizawa; Hiroshi Kikuchi; Hideo Fujikake; Y. Namikawa; K. Tada
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Paper Abstract

We describe the polymer-dispersed liquid crystal light valve (PDLCLV) using a polymer-dispersed liquid crystal (PDLC) film and a Bi12SiO20 (BSO) photoconductive crystal. The PDLCLV has many features suitable for large screen displays, such as no polarizer requirement, a high transmittance (72 to 78%) and high extinction ratio (146:1 to 178:1) in the entire visible wavelength, short rise/decay times (3/5 to 14/15 ms), and a high resolution (34 lp/mm). We discuss the light scattering and modulation characteristics of the PDLC film; photoconductive characteristics of the BSO crystal; and the design, fabrication method, and optical input/output characteristics of the PDLCLV. We also describe the configuration and image display characteristics of a monochrome projection-type display consisting of the PDLCLV as an image converter, an active matrix liquid crystal panel with thin film transistors as an image source, and a 1-kW xenon arc lamp as a reading light source.

Paper Details

Date Published: 1 August 1993
PDF: 11 pages
Opt. Eng. 32(8) doi: 10.1117/12.143972
Published in: Optical Engineering Volume 32, Issue 8
Show Author Affiliations
Kuniharu Takizawa, NHK Science and Technical Research Labs. (Japan)
Hiroshi Kikuchi, NHK Science and Technical Research Labs. (Japan)
Hideo Fujikake, NHK Science and Technical Research Labs. (Japan)
Y. Namikawa, Sumitomo Electric Industries, Ltd. (Japan)
K. Tada, Sumitomo Electric Industries, Ltd. (Japan)

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