Liquid crystal composition and liquid crystal display element

Details Liquid crystal composition and liquid crystal display element Liquid crystal composition and liquid crystal display element

1996-11-08

1998-06-09

Kelly, C. H.

Compositions

Liquid crystal compositions

Containing pleochroic dye

25229962, 25229963, 25229966, C09K 1900, C09K 1932, C09K 1912, C09K 1954

Patent

active

057628246

ABSTRACT:
A guest-host liquid crystal is provided by adding a quinophthalone group pigment or an anthraquinone group pigment as a non-azoic group dichroic pigment, to a host liquid crystal composition composed mainly of a halogenated benzene derivative, and having a high voltage-holding ratio of .DELTA..di-elect cons. of 4.5 to 7.5. By combining a host liquid crystal composition composed mainly of a halogenated benzene derivative and having a high voltage-holding ratio of .DELTA..di-elect cons. of 4.5 to 7.5, with a dichroic pigment having a specified, molecular structure, there is exhibited an effectiveness that it is possible to obtain a guest-host liquid crystal active matrix display element of 3.3V drive having stability under high temperature.

REFERENCES:
patent: 4596666 (1986-06-01), Blunck et al.
patent: 5006276 (1991-04-01), Kaneko et al.
patent: 5439613 (1995-08-01), Takeshita et al.
patent: 5582766 (1996-12-01), Jeon
patent: 5589100 (1996-12-01), Grasso et al.

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