High-brightness projection display using spatial light modulators with polymer-dispersed liquid crystal

Author

Kawakita, M. ; Kikuchi, H. ; Fujii, T. ; Fujikake, H. ; Aida, Toshiaki ; Takizawa, K.

Author_Institution

Sci. & Tech. Res. Labs., Japan Broadcasting Corp., Tokyo, Japan

Volume

45

Issue

2

fYear

1999

fDate

6/1/1999 12:00:00 AM

Firstpage

225

Lastpage

233

Abstract

A brightness-enhanced full-color projection display using optically addressed spatial light modulators (SLMs) with light-scattering mode polymer-dispersed liquid crystal has been developed. The SLM can modulate strong unpolarized light efficiently using the light-scattering effect. The projector using SLM with a Schlieren optical system produces bright, high-contrast images. Electrical image compensation of the shading and gamma characteristics of the SLMs carried out in the driving circuits improves the spatial uniformity and grayscale representation of the projected images. The system projects a bright image of more than 1300 cd/m² with a high extinction ratio over 130:1 on a 60-inch screen, which can be viewed in a bright living room under normal lighting conditions

Keywords

brightness; colour displays; high definition television; liquid crystal displays; optical polymers; optical projectors; spatial light modulators; television receivers; 60 cm; Bi₁₂SiO₂₀; Hi-Vision TV; Schlieren optical system; driving circuits; electrical image compensation; gamma characteristics; grayscale representation; high extinction ratio; high-brightness projection display; high-contrast images; light-scattering effect; light-scattering mode; normal lighting conditions; optically addressed spatial light modulators; polymer-dispersed liquid crystal; projected images; screen; shading characteristics; spatial light modulators; spatial uniformity; unpolarized light modulation; Cathode ray tubes; Integrated optics; Liquid crystal displays; Liquid crystal polymers; Optical films; Optical modulation; Optical polarization; Optical polymers; Optical scattering; Temperature;

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/11.796264

Filename

796264