Liquid crystal composition, liquid crystal device and liquid cry

Details Liquid crystal composition, liquid crystal device and liquid cry Liquid crystal composition, liquid crystal device and liquid cry

1994-09-28

1996-12-10

Kelly, Cynthia Harris

Compositions

Liquid crystal compositions

25229962, 25229961, 25229963, 349184, C09K 1952, C09K 1932, C09K 1930, G02F 113

Patent

active

055827632

ABSTRACT:
A liquid crystal device with little temperature-dependence of drive characteristics, such as response speed, and with good storage stability, can be produced by using a liquid crystal composition, successively assuming SmA (smectic A) phase and SmC* (chiral smectic) phase on temperature decrease. The layer spacing composition has a temperature-dependence of layer spacing d in smectic phase such that the layer spacing d increases, is constant or decreases on temperature decrease in SmA phase temperature range, assumes a first transition point where the layer spacing d abruptly decreases on temperature decrease in vicinity of transition temperature from SmA phase to SmC* phase, and assumes a second transition point where the layer spacing d commences to increase on further temperature decrease below the first transition point in SmC* temperature range.

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F. Nakano et al., Japanese Journal of Applied Physics, V. 19 No. 10 (1980), pp. 2013-2014.
Y. Ouchi et al., Japanese Journal of Applied Physics, V. 27 No. 5 (1988), pp. L725-L728.
N. A. Clark and S. T. Lagerwall, Structures and Applications of SSFLC Devices, Sep. 30-Oct. 2, 1986, pp. 456-458, Proceedings of the 6th International Display Research Conference.

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