Liquid crystal display device

Details Liquid crystal display device Liquid crystal display device

1996-07-22

1998-03-10

Sikes, William L.

Liquid crystal cells, elements and systems

With specified nonchemical characteristic of liquid crystal...

Within nematic phase

349128, 349165, G02F 11337, G02F 113, G02F 1960

Patent

active

057267294

ABSTRACT:
A liquid crystal display device comprising a first substrate having a first electrode and a homeotropic aligning film formed thereon, a second substrate having a second electrode and a homogeneous aligning film formed thereon, and a chiral nematic liquid crystal sealed between the first and second substrates. One % by weight of a dichroic dye is added to the chiral nematic liquid crystal. The liquid crystal molecules of this liquid crystal display device has a twist angle .theta. of 0.5.pi. radians or greater and smaller than (5/3).pi. radians. The cell gap d of the liquid crystal display device and the natural pitch p of the nematic liquid crystal are selected in such a way that d/p satisfies an inequality (9):

REFERENCES:
patent: 4783148 (1988-11-01), Tsuboyama et al.
patent: 5446569 (1995-08-01), Iwai et al.
patent: 5574593 (1996-11-01), Wakita et al.

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