Liquid crystal color display device

Details Liquid crystal color display device Liquid crystal color display device

1995-11-21

1998-04-28

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

G02F 11335

Patent

active

057452040

ABSTRACT:
A liquid crystal color display device comprises a liquid crystal cell 3 having a liquid crystal layer with an angle of twist being within a range of 180.degree. to 270.degree. and a pair of electrode substrates intervening the liquid crystal layer therebetween, a twist phase plate 4 serving as a birefringent layer, and a pair of polarizers 2,5. The value of .DELTA.n.cndot.d of the phase plate 4, wherein .DELTA.n represents a refractive index anisotropy and d represents a thickness, and that of the liquid crystal layer in voltage-free condition are substantially at the same level within a range of 1.4 to 2.0 .mu.m. The value of .DELTA.n.cndot.d of the liquid crystal layer can be continuously changed by appropriately controlling a voltage applied thereto. By this, colorization of the device is possible.

REFERENCES:
patent: 4936654 (1990-06-01), Suzaki et al.
patent: 5056896 (1991-10-01), Limura et al.
patent: 5212819 (1993-05-01), Wada
patent: 5287207 (1994-02-01), Mulkens et al.
patent: 5497256 (1996-03-01), Aoyama et al.

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