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Proceedings Paper

Spatial light modulators using polymer-dispersed liquid crystal and Bi12SiO20 photoconductive layers for projection display
Author(s): Kuniharu Takizawa; Hiroshi Kikuchi; Hideo Fujikake; Takanori Fujii; Masahiro Kawakita; Minori Yokozawa; Akiko Murata
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Paper Abstract

There is hopefully expected a projection display using spatial light modulators (SLMs) converting a faint input-image into a brilliant output-image. A conventional liquid crystal SLM loses more than 50% of a reading light in polarizer. To solve this problem, we developed a new SLM consisting of polymer-dispersed liquid crystal (PDLC) and Bi12SiO20 photoconductive layers. This SLM needs no polarizer, because it lets a reading light pass or scatter depending on whether a writing light is incident upon the photoconductive layer. We calculated the dependence of the resolution of the device on the several parameters including thickness, dielectric constants and conductivities of the dielectric mirror and PDLC layer by using a new electrical image method. A high-definition SLM with limiting resolution (36 - 50 lp/mm) was fabricated by stacking the optimized mirror and PDLC layer. In cooperating the device into a Schlieren optical system consisting of an LC panel as an input image source and a 1 kW Xenon lamp as a projection light source, we performed high-contrast green image projection with a total luminous flux of 1500 lumen.

Paper Details

Date Published: 7 April 1995
PDF: 13 pages
Proc. SPIE 2407, Projection Displays, (7 April 1995); doi: 10.1117/12.205909
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)
Takanori Fujii, NHK Science and Technical Research Labs. (Japan)
Masahiro Kawakita, NHK Science and Technical Research Labs. (Japan)
Minori Yokozawa, NHK Science and Technical Research Labs. (Japan)
Akiko Murata, Science Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 2407:
Projection Displays
Ming Hsien Wu, Editor(s)

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