Liquid crystal device having different natural and induced twist

Details Liquid crystal device having different natural and induced twist Liquid crystal device having different natural and induced twist

1987-06-19

1988-10-25

Miller, Stanley D.

350346, 350349, G02F 1137

Patent

active

047799587

ABSTRACT:
In a liquid crystal device, liquid crystal molecules are twisted at a predetermined angle .theta. within the range of 180.degree. to 360.degree. between a pair of substances. Molecular alignment films are formed on the inner surfaces of the pair of substrates such that an angle .alpha. between the axes of the adjacent liquid crystal molecules falls within the range of 0.degree. to 40.degree.. A liquid crystal composition having a twist abilities falling within the range of .theta.-(2500/.theta.)+.sqroot..alpha. (degrees) to .theta.-(12500/.theta.)+.sqroot..alpha. (degrees) is filled between the substrates, thereby eliminating a memory phenomenon and alignment defects such as reverse twisting alignment defects and at the same time improving multiplexing drive characteristics.

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Miyaii et al., "Control and Elimination of Disclinations in Twisted Nematic Liquid Crystal Displays" IEEE Trans. on Elec. Dev., vol. ED-24, No. 7, Jul. 1977.
Scheffer et al., "24.times.80 Character LC Panel Using the Supertwisted Birefringence Effect," SID International Symposium Digest of Technical Papers, pp. 120-123, May 1985.

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