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    • 3. 发明授权
    • Liquid crystal compositions
    • 液晶组成
    • US06245257B1
    • 2001-06-12
    • US09131853
    • 1998-08-10
    • Yukari SakaiShinichi NishiyamaToyotaro MaruyamaTakahiro Fujiyama
    • Yukari SakaiShinichi NishiyamaToyotaro MaruyamaTakahiro Fujiyama
    • C09K1932
    • C09K19/0266C09K19/322
    • The liquid crystal composition of the invention contains at least two compounds represented by the following formula (A) and each having different structures, one or more methylene group in the alkylene group R1 may be substituted with —O— groups, not less than 50% by weight, and has a transmitted light quantity I32 satisfying the condition of 0.5≦I32≦0.50, wherein R1 is an alkyl group of 2 to 20 carbon atoms; m is 0 or 1; Z is a —COO— group or a —CH2O— group; X is a hydrogen atom, a methyl group or a trifluoromethyl group; and R2 is a group selected from the group consisting of a straight-chain alkyl group of 1 to 5 carbon atoms, an ether group represented by —(CH2)p—O—(CH2)qCH3 and an alkene group wherein a terminal ethyl group consisting a straight-chain alkyl group of 2 to 5 carbon atoms is replaced with a group having a C═C double bond.
    • 本发明的液晶组合物含有至少两种由下式(A)表示的化合物,各自具有不同的结构,亚烷基R1中的一个或多个亚甲基可以被-O-基取代,不少于50% ,并且具有满足0.5≤I32≤0.50的条件的透射光量I32,其中R1为2〜20个碳原子的烷基; m为0或1; Z是-COO-基或-CH2O-基; X是氢原子,甲基或三氟甲基; 并且R 2是选自由1至5个碳原子的直链烷基组成的组,由 - (CH 2)p O-(CH 2)q CH 3表示的醚基团和烯烃基团,其中末端乙基由 2至5个碳原子的直链烷基被具有C = C双键的基团代替。
    • 4. 发明授权
    • Tetralin compound, liquid crystal material and liquid crystal composition
    • 四氢化萘化合物,液晶材料和液晶组合物
    • US6117359A
    • 2000-09-12
    • US400289
    • 1999-09-21
    • Takahiro FujiyamaToyotaro MaruyamaYukari Sakai
    • Takahiro FujiyamaToyotaro MaruyamaYukari Sakai
    • C07C69/76C07C69/734C07C69/757C07C69/94C09K19/02C09K19/32C09K19/46C09K19/12
    • C09K19/0266C07C69/734C07C69/757C07C69/94C09K19/322C09K19/46C09K2019/325
    • The invention to provide novel tetralin compounds, liquid crystal materials and liquid crystal compositions, which can constitute a liquid crystal element affording a wide operating temperature range, a high switching speed and a small consumption of electric power as well as a stable contrast.The tetralin compound of the invention is represented by the following formula [I] ##STR1## wherein R.sup.1 is an alkyl group or a polyfluoroalkyl group of 3-20 carbon atoms (wherein one --CH.sub.2 -- or 2 or more --CH.sub.2 -- or --CF.sub.2 -- not adjacent to each other in these groups may be substituted with --O--), X is --COO--, --O-- or a single bond, A is each independently selected from ##STR2## (Z.sup.1 and Z.sup.2 are hydrogen or fluorine), Y is a group selected from --COO--, --CH.sub.2 O--, --OCH.sub.2 --, and --CH.sub.2 CH.sub.2 --, R.sup.1 * is an optically active group represented by the formula --C*H--(CF.sub.3)--(CH.sub.2).sub.m --O--C.sub.n H.sub.2n+1 [II]. (m is an integer of 2-5, and n is an integer of 1-3.).
    • 本发明提供能够构成提供宽工作温度范围的液晶元件,高开关速度和小功率电力以及稳定的对比度的新的四氢化萘化合物,液晶材料和液晶组合物。 本发明的四氢化萘化合物由下式[I]表示,其中R 1是3-20个碳原子的烷基或多氟烷基(其中一个-CH 2 - 或2个或更多个-CH 2 - 或-CF 2 - 不相邻 在这些基团中彼此可以被-O-取代),X是-COO-,-O-或单键,A各自独立地选自(Z1和Z2是氢或氟),Y是选自 由-COO - , - CH 2 O-,-OCH 2 - 和-CH 2 CH 2 - 表示的基团,R 1 *是由式-C * H-(CF 3) - (CH 2)m O-C n H 2n + 1 [II]表示的光学活性基团。 (m为2-5的整数,n为1-3的整数)。
    • 7. 发明授权
    • Liquid crystal compositions
    • 液晶组成
    • US6007737A
    • 1999-12-28
    • US952732
    • 1997-11-25
    • Shinichi NishiyamaYuichirou TatsukiTakahiro FujiyamaChiho HiranoHideo HamaTohru Yamanaka
    • Shinichi NishiyamaYuichirou TatsukiTakahiro FujiyamaChiho HiranoHideo HamaTohru Yamanaka
    • C09K19/02C09K19/52C09K19/20C09K19/32
    • C09K19/0266C09K19/0225
    • The first smectic liquid crystal composition of the invention has a voltage gradation parameter L of less than 0.6, said parameter being defined by the equation L=S.sub.H /S.sub.O with the proviso that: a liquid crystal cell filled with a liquid crystal composition is placed between a pair of polarizing plates arranged in the crossed Nicols state; a voltage is applied to the liquid crystal cell to form a hysteresis curve showing a correlation between the voltage and a transmittance; and a tangent line I.sub.R of the hysteresis curve within a region wherein the transmittance steeply increases intersects a tangent line I.sub.F of the hysteresis curve within a region which is adjacent to the voltage-steep increase region and which is on the higher-voltage side at an intersection point P. In the above equation, S.sub.O is an area of a rectangular triangle having as an oblique side a straight line PQ which has, as both ends, the intersection point P and an intersection point Q of an axis of ordinate (V=0) and the hysteresis curve; and S.sub.H is an area of a region enclosed with the straight line PQ, the hysteresis curve and a constant-voltage straight line which passes the intersection point P. The second liquid crystal composition of the invention has a parameter G of 0 to 0.3, said parameter G being defined by the following equation with the proviso that when an absolute value .vertline.V.vertline. of a voltage V applied in the same manner as described above is increased to the predetermined value .vertline.V.vertline..sub.min, the light quantity T becomes a maximum value T.sub.max ; ##EQU1## In the above equation, S is an area of a region enclosed with the hysteresis curve, T.sub.min is a minimum value of the transmittance; and T.sub.0 is a transmittance given when no voltage is applied.
    • PCT No.PCT / JP96 / 01478。 371日期:1997年11月25日 102(e)1997年11月25日日期PCT提交1996年5月31日PCT公布。 公开号WO96 / 38513 日本1996年12月5日本发明的第一层间液晶组合物具有小于0.6的电压等级参数L,所述参数由式L = SH / SO定义,条件是:填充有液体的液晶单元 将晶体组成放置在以正交尼科尔斯状态布置的一对偏振板之间; 向液晶单元施加电压,形成表示电压与透射率的相关性的滞后曲线。 并且在透射率急剧增加的区域内的滞后曲线的切线IR与滞后曲线的切线IF在与电压陡峭增加区域相邻的区域内相交,并且位于高电压侧的区域 在上述等式中,SO是具有倾斜侧的直线PQ的矩形三角形的区域,该直线PQ的两端具有交点P和纵轴的交点Q(V = 0)和滞后曲线; SH是通过交点P的直线PQ,滞后曲线和恒定电压直线所包围的区域的区域。本发明的第二液晶组合物的参数G为0〜0.3,所述 参数G由以下等式定义,条件是当绝对值| V |时 以与上述相同的方式施加的电压V增加到预定值| V | min,光量T变为最大值Tmax; 在上述等式中,S是用滞后曲线包围的区域的面积,Tmin是透射率的最小值; 而T0是当没有施加电压时给出的透射率。