Anti-ferroelectric liquid crystal composition

Details Anti-ferroelectric liquid crystal composition Anti-ferroelectric liquid crystal composition

1998-05-22

1999-12-14

Wu, Shean C.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229966, 25229967, 25229964, 349143, 349174, 349184, C09K 1912, G02F 11343

Patent

active

060012781

ABSTRACT:
Provided are an anti-ferroelectric liquid crystal composition consisting essentially of (a) a swallow-tailed compound of the formula (1), (b) an anti-ferroelectric liquid crystal compound of the formula (2), and (c) a phenyl ester compound of the formula (3), and a liquid crystal display device using the composition, ##STR1## The above anti-ferroelectric liquid crystal composition has an anti-ferroelectric phase in a broad temperature range, has a high response time I in the transition from an anti-ferroelectric state to a ferroelectric state and a proper response time II in the transition from a ferroelectric state to an anti-ferroelectric state, and can therefore provide an anti-ferroelectric liquid crystal display device having high display quality.

REFERENCES:
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Chandani et al, Novel Phases Exhibiting Tristable Switching, Japanese Journal of Applied Physics, vol. 28, No. 7, Jul. 1989, pp. L1261-L1264.
Chandi et al, Antiferroelectric Chiral Smectic Phases . . . in MHPOBC, Japanese Journal of Applied Physics, vol. 28, No. 7, Jul. 1989, pp. L1265-L1268.
Johno et al, Smectic Layer Switching by an Electric Field . . . Crystal Cells, Japanese Journal of Applied Physics, Vo. 28, No. 1, Jan. 1989, pp. L119-L120.
Johno et al, Correspondence between Smectric Layer Switching . . . Mixture, Japanese Journal of Applied Physics, vol. 29, No. 1, 1990, pp. L111-L114.
Preprints of The 4th Ferroelectric Liquid Crystal International Symposium, Sep. 28 -Oct. 1, 1993, pp. 77.
Nakagawa, A Hysteresis Model for Antiferrolectric SmCA Phases, Japanese Journal of Applied Physics, vol. 30, No. 8, Aug. 1991, pp. 1759-1764.

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