Racemic compound and anti-ferroelectric liquid crystal compositi

Details Racemic compound and anti-ferroelectric liquid crystal compositi Racemic compound and anti-ferroelectric liquid crystal compositi

1997-11-21

1999-11-16

Wu, Shean C.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229964, 25229965, 25229966, C09K 1920, C09K 1912

Patent

active

059851724

ABSTRACT:
A racemic compound of the formula (1) ##STR1## and an anti-ferroelectric liquid crystal composition consisting essentially of said racemic compound and one anti-ferroelectric liquid crystal compound of the formula (2) or a mixture of two or more compounds selected from anti-ferroelectric liquid crystal compounds of the formula (2), ##STR2## said composition having excellent steepness of threshold, having an anti-ferroelectric phase over a broad temperature range and having the performance of a high response speed and a high contrast.

REFERENCES:
patent: 5840209 (1998-11-01), Mineta et al.
Neubert, et al., "Synthesis and Mesomorphic Properties of Some Aromatic Esters Containing 2-Butyl, 2-Octyl and 2-Methylbutyl Moieties in the Terminal Chains", Mol. Cryst. Liq. Cryst., 1993, vol. 237, pp. 193-205.
A.D.L. Chandani, et al., "Tristable Switching in Surface Stabilized Ferroelectric Liquid Crystals with a Large Spontaneous Polarization", Japan Journal of Appl. Physics, 27(5), L729-L732 (May 1988).
A.D.L Chandani, et al., "Novel Phases Exhibiting Tristable Switching", Japan Journal of Appl. Physics, 28(7), L1261-L1264 (Jul. 1989).
A.D.L. Chandani, et al., "Antiferroelectric Chiral Smectic Phases Responsible for the Tristable Switching in MHPOBC", Japan Journal of Appl. Physics, 28(7), L1265-L1268 (Jul. 1989).
M. Johno, et al., "Smectic Layer Switching by an Electric Field in Ferroelectric Liquid Crystal Cells", Jap. Jour. Appl. Phys. 28(1), L119-L120 (Jan. 1989).
M. Johno et al., Correspondence between Smectic Layer Switching and DC Hysteresis of Apparent Tilt Angle in an Antiferroelectric Liquid Crystal Mixture, Jap. Jour. Appl. Phys., 29(1), L111-L114 (Jan. 1990).
N. Yamamoto, et al., Full-Color Antiferroelectric Liquid Crystal Display, Preprints--Fourth International Conference on Ferroelectric Liquid Crystals, Tokyo, Japan, pp. 77-78 (1993).

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