申请人:HASEBA YASUHIRO
公开号:US20090059157A1
公开(公告)日:2009-03-05
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, R
1
is C
1
-C
20
alkyl; the rings A
1
-A
6
are 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; Z
1
-Z
6
are each a single bond; L
1
-L
4
are each a hydrogen atom or a halogen atom; X
1
is 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.