GH LCD having particular parameters and characteristics

Details GH LCD having particular parameters and characteristics GH LCD having particular parameters and characteristics

1996-09-04

2000-07-25

Sikes, William L.

Liquid crystal cells, elements and systems

With specified nonchemical characteristic of liquid crystal...

Within nematic phase

349181, 349165, G02F 113

Patent

active

060942525

ABSTRACT:
A liquid crystal display device having a liquid crystal cell including: a pair of substrates at least one of which has light transparency; a chiral nematic liquid crystal layer having positive anisotropy of dielectric constant, disposed between the pair of substrates; and a voltage applying circuit for applying a voltage to the liquid crystal layer, wherein the liquid crystal layer contains a pleochroic dye, and liquid crystal molecules in the liquid crystal layer are twisted with respect to a helical axis perpendicular to surfaces of the pair of substrates, a twist angle of the liquid crystal molecules from one of the pair of substrates to the other of the pair of substrates is in a range selected from the group consisting of a range from 0.degree. to 50.degree., a range from 140.degree. to 250.degree., and a range of twist angles obtained by adding an integral multiple of n radian to the twist angles in the range from 0.degree. to 50.degree. and in the range from 140.degree. to 250.degree..

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