Liquid crystal cells – elements and systems – With specified nonchemical characteristic of liquid crystal... – Within nematic phase
Patent
1995-03-21
1997-02-25
Sikes, William L.
Liquid crystal cells, elements and systems
With specified nonchemical characteristic of liquid crystal...
Within nematic phase
349 88, G02F 113, G02F 1136
Patent
active
056064420
ABSTRACT:
A photocurable polymer precursor added to a liquid crystal material polymerizes to form a mixture that significantly lowers the threshold and saturation voltages of a standard twisted nematic cell. The performance characteristics of the resulting display device resembles those of a device with a very high pretilt, thereby providing an economical method of fabricating liquid crystal cells of a type that require a high pretilt alignment. The presence of the polymer substantially reduces adverse ion-related effects such as optical droop and charge retention in the liquid crystal display device.
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Doane et al., "Current Trends in Polymer Dispersed Liquid Crystals", IEEE, 1991, pp. 175-178.
Shimada et al, "Control of Polymer Orientation in Polymer Dispersed Liquid Crystal (PDLC)," Jpn. J. Appl. Physics, vol. 31, Mar. 15, 1992, pp. L352-L354.
Hikmet, "Anisotropic gels and plasticized networks formed by liquid crystal molecules," Liquid Crystals, 1991, vol. 9, No. 3, 405-416.
Yang et al., Conference Record of 1991 IDRC, 1991, p. 49.
Bos Philip J.
Rahman Jolly A.
Angello Paul S.
Miller Charles
Sikes William L.
Tektronix Inc.
Winkelman John D.
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