2037803-A is referenced by 35 patents.

In a liquid crystal mixture which is intended for use in displays that have no polarizers and which is composed of a dye as a guest phase embedded in a host phase mixture consisting of a nematic liquid crystal with an optically active dopant, at least part of the dye is an anthraquinone dye having the general formula: in which R, R, and R are the same or are different and each is a hydrogen atom or a hydroxyl, amino or short- chain N-monoalkylamino group; Y and Z are the same or are different and each is a halogen atom, an amino or hydroxyl group or an alkyl, alkoxy or alkylamino groups containing from 1 to 16 carbon atoms; and m and n are each 0, 1, or 2. These dyes are commercially available and their dichroic ratios are nearly as good as the best anthraquinone dyes proposed for the cholesteric guest-host effect, which must be custom prepared.; Furthermore, the dyes used have an adequate solubility in the host phase and are especially stable to the UV component found in natural daylight.

Liquid crystal mixture
Application Number
GB19790043676 19791219
Publication Number
2037803 (A)
Application Date
December 19, 1979
Publication Date
July 16, 1980
Bbc Brown Boveri & Cie
C09K 03/34
G02F 01/13
C09K 19/60
C09B 01/00
G02F 01/137
C09K 19/60
C09B 01/20
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