THREE-RING LIQUID CRYSTAL COMPOUND HAVING LATERAL FLUORINE, LIQUID CRYSTAL COMPOSITION, AND LIQUID CRYSTAL DISPLAY DEVICE
申请人:Kobayashi Masahide
公开号:US20110037024A1
公开(公告)日:2011-02-17
The invention provides a liquid crystal compound represented by the following formula having stability to heat, light and so forth, a wide temperature range of a nematic phase, a small viscosity, a large optical anisotropy and a suitable elastic constant K
33
(K
33
: bend elastic constant), and further having a suitable and negative dielectric anisotropy and an excellent compatibility with other liquid crystal compounds, and provides a liquid crystal composition including the compound,
wherein R
1
and R
2
are hydrogen, alkyl or the like, ring A
1
is trans-1,4-cyclohexylene, 1,4-phenylene or the like, L
1
to L
4
are hydrogen or fluorine, and at least three of them are fluorine; when the ring A
1
is trans-1,4-cyclohexylene or the like, Z
1
is a single bond, —(CH
2
)
2
— or the like, when ring A
1
is 1,4-phenylene, Z
1
is —(CH
2
)
2
— or the like.
该发明提供了一种液晶化合物,其由以下公式表示,具有耐热、耐光等稳定性,具有向列相的宽温度范围、小粘度、大光学各向异性和适当的弹性常数K33(K33:弯曲弹性常数),并且具有适当的负电介质各向异性和与其他液晶化合物良好的相容性,并提供了包括该化合物的液晶组合物,其中R1和R2是氢、烷基或类似物,环A1是反式-1,4-环己基、1,4-苯基或类似物,L1到L4是氢或氟,其中至少三个是氟;当环A1为反式-1,4-环己基或类似物时,Z1是单键,-(CH2)2-或类似物,当环A1为1,4-苯基时,Z1是-(CH2)2-或类似物。