Liquid-crystalline medium for electrooptical display elements ba

Details Liquid-crystalline medium for electrooptical display elements ba Liquid-crystalline medium for electrooptical display elements ba

1991-01-11

1992-09-01

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229966, 548136, C09K 1934, C09K 1912, C07D28512

Patent

active

051436426

ABSTRACT:
The invention relates to a liquid-crystalline medium for electrooptical display elements based on the ECB effect, containing two components A and B which themselves comprise one or more individual compounds, component A having clearly negative dielectric anistropy and giving the liquid-crystalline phase a dielectric anistrophy of .ltoreq.-0.3, and component B having pronounced nematogeneity and a viscosity of not more than 30 mPa.s at 20.degree. C., characterized in that component A contains one or more compounds containing a structural element ##STR1##

REFERENCES:
patent: 4877549 (1989-10-01), Sawada et al.
patent: 4952699 (1990-08-01), Yong et al.
patent: 5021189 (1991-06-01), Sawada et al.
patent: 5034151 (1991-07-01), Shinjo et al.
G. Labrunie and J. Robert, "Transient Behavior of the Electrically Controlled Birefringence in a Nematic Liquid Crystal", J. Appl. Phys., vol. 44, No. 11, Nov. 1973, pp. 4869-4874.
M. F. Schiekel and K. Fahrenschon, "Deformation of Nematic Liquid Crystals with Vertical Orientation in Electrical Fields", Applied Physics Letters, vol. 19, No. 10, Nov. 15, 1991, pp. 391-393.

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