Liquid crystal composition, liquid crystal device,...

Details Liquid crystal composition, liquid crystal device,... Liquid crystal composition, liquid crystal device,...

2008-10-06

2010-06-15

Visconti, Geraldina (Department: 1795)

Compositions

Liquid crystal compositions

C252S299600, C430S020000, C428S001100, C349S056000

Reexamination Certificate

active

07736533

ABSTRACT:
A liquid crystal composition including a liquid crystal and at least three anthraquinone dyes, at least two of the anthraquinone dyes having a substituent represented by the following Formula (I):wherein in Formula (I), * represents a linking position; R25and R26each independently represent an alkyl group, a halogen atom or an alkoxy group; R27represents an alkyl group, an acyl group or an alkoxy group; R28and R29each independently represent a hydrogen atom or a substitutent; T1represents an arylene group or a heteroarylene group; Z represents an oxygen atom, a sulfur atom or a carbonyl group; m represents an integer of 0 to 2; and i represents 0 or 1, wherein when i is 1 and Z is an oxygen atom or a sulfur atom, R27is not an alkoxy group, and when i is 1 and Z is a carbonyl group, R27is not an acyl group.

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“Handbook of Liquid Crystals”, vol. 2A, Chapters 3 and 4, pp. 257-302, written by B. Bahadur, edited by D. Demus, J. Goodby, G. W. Gray, H. W. Spiess, and V. Vill, published by Wiley-VCH (1998).

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