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    Lactic acid derivative and liquid crystal composition containing same
    2.
    发明授权
    Lactic acid derivative and liquid crystal composition containing same 失效
    含有乳酸衍生物和液晶组合物

    公开(公告)号：US4882085A

    公开(公告)日：1989-11-21

    申请号：US291325

    申请日：1988-12-28

    申请人： Kazuo Yoshinaga ,  Kazuharu Katagiri ,  Akira Tsuboyama ,  Hiroyuki Kitayama ,  Kenji Shinjo ,  Chieko Hioki

    发明人： Kazuo Yoshinaga ,  Kazuharu Katagiri ,  Akira Tsuboyama ,  Hiroyuki Kitayama ,  Kenji Shinjo ,  Chieko Hioki

    IPC分类号： C07C43/23 ,  C07C45/46 ,  C07C49/84 ,  C07C69/773 ,  C07D239/26 ,  C09K19/20 ,  C09K19/34

    CPC分类号： C07D239/26 ,  C07C43/23 ,  C07C45/46 ,  C07C49/84 ,  C09K19/2021 ,  C09K19/3463

    摘要： An optically active lactic acid derivative represented by the following formula (I): ##STR1## wherein R represents a linear, branched or cyclic saturated or unsaturated hydrocarbon group having 1 to 18 carbon atoms; C* represents an asymmetric carbon atom; l is 0 or 1; m is 1 or 2; A represents a group selected from the following groups (a) and (b):(a) hydroxyl group, halogen, benzyloxy group, phenoxy group, toluenesulfonic acid group, acetyloxy group trifluoroacetyloxy group; ##STR2## (wherein R' is an alkyl group or alkoxy group having 4 to 18 carbon atoms, n is 0 or 1, ##STR3## with proviso that when A is selected from the group in the above group (a), l is 1 and m is 1 or 2; and when A is selected from the groups in the above group (b), m=n=1 when l is 0, or m and n are 0, 1 or 2 and m+n is 1 or 2 when l is 1, and ##STR4##

    摘要翻译： 由下式（I）表示的光学活性乳酸衍生物：其中R表示具有1至18个碳原子的直链，支链或环状饱和或不饱和烃基; C *表示不对称碳原子; l为0或1; m为1或2; A表示选自以下组（a）和（b）中的基团：（a）羟基，卤素，苄氧基，苯氧基，甲苯磺酸基，乙酰氧基三氟乙酰氧基; （其中R'为具有4至18个碳原子的烷基或烷氧基，n为0或1，条件是当A选自上述组（a）中时，l为 1和m为1或2;当A选自上述组（b）中的基团时，当l为0时，m = n = 1，或m和n为0,1或2，m + n为1 或当l为1时为2，而为

    Ferroelectric liquid crystal devices having reverse twist angle and stable states resulting from A.C. excitation
    3.
    发明授权
    Ferroelectric liquid crystal devices having reverse twist angle and stable states resulting from A.C. excitation 失效
    铁电液晶器件具有反向扭转角和由A.C.激发产生的稳定状态

    公开(公告)号：US4778259A

    公开(公告)日：1988-10-18

    申请号：US885658

    申请日：1986-07-15

    申请人： Hiroyuki Kitayama ,  Akira Tsuboyama ,  Yutaka Inaba ,  Kazuharu Katagiri ,  Kenji Shinjo

    发明人： Hiroyuki Kitayama ,  Akira Tsuboyama ,  Yutaka Inaba ,  Kazuharu Katagiri ,  Kenji Shinjo

    IPC分类号： C09K19/46 ,  G02F1/141 ,  G02F1/13

    CPC分类号： C09K19/46 ,  G02F1/141

    摘要： A liquid crystal device includes a pair of substrates each having a uniaxial orientation as provided by rubbing or oblique vapor deposition, and a ferroelectric liquid crystal disposed between the substrates. The uniaxial orientation axes respectively provided to the pair of substrates intersect each other at an intersection angle .theta.. The ferroelectric liquid crystal molecules may have such an alignment tendency that their axes are twisted along a normal to the substrates in the absence of an electric field when they are disposed between two substrates having the same direction of uniaxial orientation axes. The liquid crystal device may be subjected to an AC application pretreatment. The uniaxial orientation axes respectively provided to the base plates may have mutually different orientation controlling powers.

    摘要翻译： 液晶装置包括一对基板，每个基板具有通过摩擦或倾斜气相沉积提供的单轴取向，以及设置在基板之间的铁电液晶。 分别设置在一对基板上的单轴取向轴以交叉角θ彼此交叉。 铁电液晶分子可以具有这样的取向趋势，即当它们被布置在具有相同方向的单轴取向轴的两个基板之间时，它们的轴在没有电场的情况下沿着垂直于基板的法线扭转。 可以对液晶装置进行AC施加预处理。 分别设置到基板的单轴取向轴可以具有相互不同的取向控制功率。