Dichroic dyes having a plurality of azo bonding groups

Details Dichroic dyes having a plurality of azo bonding groups Dichroic dyes having a plurality of azo bonding groups

1978-09-22

1979-12-18

Padgett, Benjamin R.

Compositions

Liquid crystal compositions

252408, 350346, 350349, C09K 334, G02F 113

Patent

active

041793951

ABSTRACT:
Dichroic liquid crystal compositions for use in displays are mixtures of a liquid crystal host material and at least one of a plurality of dyes each having a plurality of azo (--N.dbd.N--) bonding groups and a high order parameter. The dichroic liquid crystal compositions each provide a contrast ratio on the order of 10:1.

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Constant, J. et al., "Pleochroic Dyes with High Order Parameters", presented at 6th International L.C. Conf., Kent, Ohio (Aug. 23-27, 1976).
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