Liquid crystal medium having a low temperature-dependence of the

Details Liquid crystal medium having a low temperature-dependence of the Liquid crystal medium having a low temperature-dependence of the

1990-07-16

1992-08-18

Stoll, Robert L.

Compositions

Liquid crystal compositions

2522995, C09K 1952, C09K 1954

Patent

active

051396980

ABSTRACT:
The invention relates to a nematic liquid crystal medium of positive dielectric anisotropy containing one or more achiral liquid crystal compounds and a doping component, the doping component contains one or more doping substance which are chosen such that the medium, when used in a test cell suitable for determination of .DELTA.(d/p)(T), has a low temperature dependence of the d/p window d[.DELTA.(d/p)]/dT.

REFERENCES:
patent: 4744918 (1988-05-01), Heppke et al.
patent: 4779960 (1988-10-01), Kozaki et al.
patent: 4780240 (1988-10-01), Emato et al.
Finkenzeller et al., "Performance of Chiral Dopants in Nematic Mixtures", Mol. Cryst. Liq. Cryst. Letters, vol. 6(3); pp. 87-93.

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