1 August 1993 Polymer-dispersed liquid crystal light valves for projection display
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Optical Engineering, 32(8), (1993). doi:10.1117/12.143972
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.
Kuniharu Takizawa, Hiroshi Kikuchi, Hideo Fujikake, Y. Namikawa, K. Tada, "Polymer-dispersed liquid crystal light valves for projection display," Optical Engineering 32(8), (1 August 1993). https://doi.org/10.1117/12.143972
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