Liquid crystal shutter having a specified zero voltage time visc

Details Liquid crystal shutter having a specified zero voltage time visc Liquid crystal shutter having a specified zero voltage time visc

1996-05-29

1997-12-16

Sikes, William L.

Liquid crystal cells, elements and systems

Liquid crystal system

Liquid crystal eyewear

349 15, 349 33, 349180, G02F 11335, G02F 1133, G02F 113

Patent

active

056991339

ABSTRACT:
A liquid crystal shutter has a liquid crystal layer which is made of a liquid crystal material prepared from a nematic liquid crystal. The ratio d/p of the thickness d of the liquid crystal layer to the chiral pitch p of the liquid crystal material and a twist angle .theta. which is set by a pair of alignment layers for liquid crystal molecules of the liquid crystal layer satisfy the relation of .theta./360.degree.<d/p.

REFERENCES:
patent: 4143947 (1979-03-01), Aftergut et al.
patent: 4812258 (1989-03-01), Krause et al.
patent: 4944577 (1990-07-01), Yoshida et al.
patent: 5048933 (1991-09-01), Asano
patent: 5402191 (1995-03-01), Dean et al.

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