Optically isotropic liquid crystal medium and optical device

Details Optically isotropic liquid crystal medium and optical device Optically isotropic liquid crystal medium and optical device

2011-02-01

2011-02-01

Wu, Shean C (Department: 1722)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299610, C252S299620, C252S299630, C252S299660, C252S299670

Reexamination Certificate

active

07879413

ABSTRACT:
A liquid crystal medium is described, which has stability to heat, light and so on, a wide temperature range of liquid crystal phase, a large optical anisotropy and a large dielectric anisotropy, and exhibits an optically isotropic liquid crystal phase. The liquid crystal medium includes a liquid crystal compound represented by formula (1) and a chiral reagent and exhibits an optically isotropic liquid crystal phase.For example, R1is C1-C20alkyl; the rings A1-A6are each 1,4-cyclohexylene, 1,3-dioxan-2,5-diyl, 1,4-phenylene, or 1,4-phenylene with arbitrary hydrogen atom being replaced by a halogen atom; Z1-Z6are each a single bond; L1-L4are each a hydrogen atom or a halogen atom; X1is a hydrogen atom or a halogen atom; each of l, m, n, o, p and q is 0 or 1, and the sum of them is 3.

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