Chlorofluorobenzene liquid crystal compound, liquid crystal composition, and liquid crystal display device
申请人:Goto Yasuyuki
公开号:US20060198968A1
公开(公告)日:2006-09-07
Such a liquid crystal compound is provided that has stability to heat, light and so forth, has a nematic phase in a wide temperature range, has a small viscosity, a suitable optical anisotropy, and suitable elastic constants K
33
and K
11
(K
33
: bend elastic constant, K
11
: splay elastic constant), and has suitable negative dielectric anisotropy and excellent compatibility with other liquid crystal compounds. A liquid crystal composition containing the liquid crystal compound, and a liquid crystal display device containing the liquid crystal composition are also provided.
The liquid crystal compound is represented by one of formulas (a) to (d), the liquid crystal composition contains the liquid crystal compound, and the liquid crystal display device contains the liquid crystal composition:
wherein Ra and Rb are independently linear alkyl or linear alkoxy, rings A
1
, A
2
, B and C are independently trans-1,4-cyclohexylene or 1,4-phenylene, Z
11
, Z
12
, Z
2
and Z
3
are independently a single bond or alkylene, and one of X
1
and X
2
is fluorine, and the other thereof is chlorine.
提供一种液晶化合物,具有对热、光等稳定性,在广泛温度范围内具有向列相,粘度小,适当的光学各向异性,适当的弹性常数K33和K11(K33:弯曲弹性常数,K11:扭曲弹性常数),并具有适当的负介电各向异性以及与其他液晶化合物的优良相容性。还提供一种含有该液晶化合物的液晶组合物和一种含有该液晶组合物的液晶显示装置。该液晶化合物由以下公式(a)至(d)中的一种表示,液晶组合物含有该液晶化合物,液晶显示装置含有该液晶组合物:其中Ra和Rb分别是线性烷基或线性烷氧基,环A1、A2、B和C分别是反式-1,4-环己亚烷或1,4-苯基,Z11、Z12、Z2和Z3分别是单键或烷基,X1和X2中的一个是氟,另一个是氯。