Ferroelectric liquid crystal composition

Details Ferroelectric liquid crystal composition Ferroelectric liquid crystal composition

1995-03-01

1996-11-05

Kelly, C. H.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229962, 25229966, 25229967, C09K 1934, C09K 1932, C09K 1912, C09K 1920

Patent

active

055714501

ABSTRACT:
A ferroelectric liquid crystal composition comprises ferroelectric liquid crystal molecules defined by the product between a liquid crystal molecule design parameter, .alpha., and an apparent cone angle, .theta., of the liquid crystal molecules, .alpha..theta., being such that 12.5.ltoreq..alpha..theta..ltoreq.16 wherein .alpha.=(an infrared peak intensity ratio of the alkyl chain portion of a liquid crystal molecule prior to and after switching through an electric field)/(an infrared peak intensity ratio of the core portion of the liquid crystal molecules prior to and after switching through an electric field) and .theta. is an apparent cone angle (.degree.) observed from the direction to the substrate normal and the cone has an imaginary circular cone surface when liquid crystal molecules are rotated along the imaginary circular cone surface at the time of switching through an electric field. The composition ensures high speed response and high contrast.

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Article entitled "Liquid Crystals" by Yasuda, Nito and Matsui vol. 14, No. 6 1993.

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