LIQUID CRYSTAL COMPOUND HAVING NEGATIVE DIELECTRIC ANISOTROPY, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME
申请人:Yamashita Junichi
公开号:US20120190897A1
公开(公告)日:2012-07-26
The invention provides a liquid crystal compound having general physical properties necessary for the liquid crystal compound, namely, stability to heat, light and so forth, a small viscosity, a refractive index anisotropy having a suitable magnitude value, a dielectric anisotropy having a suitable magnitude value, steep electrooptical characteristics, a wide temperature range of a nematic phase, and an excellent compatibility with other liquid crystal compounds, in particular, a liquid crystal compound having a wide temperature range of the nematic phase; a compound represented by formula (i):
wherein, for example, R
1
and R
2
are alkyl having 1 to 8 carbons or alkenyl having 2 to 8 carbons; ring A
1
is trans-1,4-cyclohexylene or 1,4-phenylene; ring A
2
is trans-1,4-cyclohexylene or 2,3-difluoro-1,4-phenylene; Q
1
and Q
2
are fluorine or chlorine; and h is 0, 1 or 2.
本发明提供了一种液晶化合物,具有液晶化合物所需的一般物理性能,即耐热、耐光等稳定性,小粘度,适当大小的折射率各向异性,适当大小的介电各向异性,陡峭的电光特性,宽的向列相温度范围,以及与其他液晶化合物的优异相容性,特别是一种具有宽的向列相温度范围的液晶化合物;其中,化合物的结构式为(i):其中,例如,R1和R2是具有1至8个碳或2至8个碳的烷基或烯基;环A1是反-1,4-环己基或1,4-苯基;环A2是反-1,4-环己基或2,3-二氟-1,4-苯基;Q1和Q2是氟或氯;h为0、1或2。