Cholesteric liquid crystal display employing circular polarizer

Details Cholesteric liquid crystal display employing circular polarizer Cholesteric liquid crystal display employing circular polarizer

1996-12-04

1998-08-18

Gross, Anita Pellman

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

349176, G02F 11335, G02F 113

Patent

active

057964548

ABSTRACT:
A cholesteric liquid crystal display ("LCD") and methods of operating and manufacturing the LCD. The LCD includes: (1) a controllable cholesteric liquid crystal (CLC) located between first and second substrates, the controllable CLC selectively exhibiting an "on" state and an "off" state and having a circular polarity of a predetermined handedness when the controllable CLC is in the "on" state and (2) a circular polarizer, located proximate the first substrate and having a circular polarity of a particular handedness, that cooperates with the controllable CLC to increase the difference between the relative brightness of the "on" state and the "off" state, whereby a contrast ratio of the cholesteric LCD is increased.

REFERENCES:
patent: 4139272 (1979-02-01), Laesser et al.
patent: 4726663 (1988-02-01), Buzak
patent: 5200844 (1993-04-01), Suvada
patent: 5459591 (1995-10-01), Faris

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