Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1997-09-22
1999-11-09
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
349106, 349102, 349119, G02F 11335
Patent
active
059824638
ABSTRACT:
A color liquid crystal display device comprises a liquid crystal cell and a polymer film. The liquid crystal cell comprises a liquid crystal layer positioned between a pair of transparent substrates, on whose innersides transparent electrodes are provided. The polymer film is positioned at one side of the liquid crystal cell. The liquid crystal layer and the polymer film are sandwiched by a pair of polarization films. A twist angle of the liquid crystal layer is set to be a predetermined value. The product of birefringence of the nematic liquid crystal, .DELTA.n.sub.LC, and a thickness of liquid crystal layer, d.sub.LC, .DELTA.n.sub.LC .multidot.d.sub.LC is set to be a predetermined value. The birefringence difference .DELTA.(R)=R.sub.Film -.DELTA.n.sub.LC .multidot.d.sub.LC, which is defined by using the .DELTA.n.sub.LC .multidot.d.sub.LC and retardation of the polymer film, R.sub.Film, is set to be a value between 0.0 .mu.m and 0.1 .mu.m. The present color liquid crystal device can express a black and white display in achromatic color having bright white and with high contrast, and a red display with high color purity.
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Fujita Shingo
Mizuno Hiroaki
Ogawa Tetsu
Yamaguchi Hisanori
Chowdhury Tarifur R.
Matsushita Electric - Industrial Co., Ltd.
Sikes William L.
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