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

1997-09-04

1999-09-14

Wu, Shean C.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229964, 25229965, 25229966, C09K 1920, C09K 1912

Patent

active

059519142

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 in a broad temperature range and having the performance of a high response speed and a high contrast.

REFERENCES:
patent: 5660762 (1997-08-01), Ito et al.
Chandani, et al., "Tristable Switching in Surface Stabilized Ferroelectric Liquid Crystals with a Large Spontaneous Polarization", Jap. Journal of Appl'd Phys., vol. 27, No. 5, May, 1988, pp. L729-L732.
Chandani, et al., "Novel Phases Exhibiting Tristable Switching", Jap. Journal of Appl. Phys., vol. 28, No. 7, Jul. 1989, pp. L1261-L1264.
Chandani, et al., "Antiferroelectric Chiral Smectic Phases Responsible for the Tristable Switching in MHPOBC", Jap. Journal of Appl. Phys., vol. 28, No. 7, Jul., 1989, pp. L1265-L1268.
Johno, et al., "Smectic Layer Switching by an Electric Field in Ferroelectric Liquid Crystal Cells", Jap. Journal of Appl. Phys., vol. 28, No. 1, Jan., 1989, pp. L119-L120.
Johno, et al., "Correspondence between Smectic Layer Switching and DC Hysteresis of Apparent Tilt Angle in an Antiferroelectric Liquid Crystal Mixture",Jap. Jrnl. of Appl. Phys., vol. 29, No. 1, Jan.,1990 pp. L111-L114.
Yamamoto, et al., "Full-Color Antiferroelectric Liquid Crystal Dislay", Preprints of the 4th International Conference on Ferroelectric Liquid Crystals, 1993, pp. 77-78.

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