DIHYDROPYRAN COMPOUND, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE
申请人:JNC CORPORATION
公开号:US20150361344A1
公开(公告)日:2015-12-17
To provide a liquid-crystal compound satisfying at least one physical property such as high stability to ultraviolet light and heat, a high clearing point, low minimum temperature of a liquid crystal phase, small viscosity, suitable optical anisotropy, large dielectric anisotropy and excellent compatibility with other liquid-crystal compounds, a liquid-crystal composition containing the compound, and a liquid-crystal display device including the composition.
The compound is represented by formula (1), the composition contains the compound, and the liquid-crystal display device includes the composition:
wherein, for example, R
a
and R
b
are alkyl; rings A
1
, A
2
, A
3
and A
4
are 1,4-cyclohexylene or 1,4-phenylene; and P is a divalent group represented by formula (pr-1) or (pr-2):
wherein, for example, Z
1
, Z
2
, Z
3
and Z
4
are a single bond or alkylene; and a, b, c and d are 0, 1 or 2, and a sum of a, b, c and d is 5 or less.
为了提供一种液晶化合物,满足至少一种物理性质,如对紫外线和热的高稳定性,高清晰点,液晶相的低最小温度,小粘度,适当的光学各向异性,大介电各向异性和与其他液晶化合物的良好相容性,提供了一种液晶组合物,其中包含该化合物,并且包括该组合物的液晶显示装置。该化合物由式(1)表示,组合物含有该化合物,液晶显示装置包括该组合物:其中,例如,Ra和Rb是烷基;环A1,A2,A3和A4是1,4-
环己烯基或1,4-苯基;P是由式(pr-1)或(pr-2)表示的二价基团:例如,Z1,Z2,Z3和Z4是单键或烷基;a,b,c和d为0,1或2,a,b,c和d的总和不超过5。