Supertwisted nematic liquid crystal displays
    2.
    发明公开
    Supertwisted nematic liquid crystal displays 有权
    Supertwist-nematischeFlüssigkristallanzeigen

    公开(公告)号:EP1002848A1

    公开(公告)日:2000-05-24

    申请号:EP99122029.4

    申请日:1999-11-12

    申请人: MERCK PATENT GmbH

    IPC分类号: C09K19/02 C09K19/46

    摘要: The invention relates to supertwist liquid-crystal displays (STN-LCDs) having short switching times and good steepnesses and angle dependencies, and to the novel nematic liquid-crystal mixtures used therein, which comprise compounds having a 3,4,5-trifluorophenyl group together with compounds of formula I
    wherein

    R 3 is an alkenyl group with 2 to 7 C atoms,
    R 4 is an optionally fluorinated alkyl, alkoxy, alkenyl or alkenyloxy group with 1 to 12 C atoms, wherein one or two non-adjacent CH 2 groups can be replaced by -O-, -CH=CH-, -CO-, -OCO- or -COO- in such a manner that O atoms are not directly adjacent to one another, or, in case m = 1, R 4 can also be Q-Y,
    Q is CF 2 , OCF 2 , CFH, OCFH or a single bond,
    Y is F or Cl,
    L 1 and L 2 are each independently H or F, and
    m is 0 or 1.

    摘要翻译: 本发明涉及具有短切换时间和良好陡度和角度依赖性的超扭转液晶显示器(STN-LCD),以及其中使用的新型向列型液晶混合物,其包括具有3,4,5-三氟苯基 与式I的化合物其中R 3是具有2至7个C原子的烯基,R 4是具有1至12个C原子的任选氟化的烷基,烷氧基,烯基或烯氧基,其中一个 或两个不相邻的CH 2基团可以被-O - , - CH = CH-,-CO-,-OCO-或-COO-取代,使得O原子彼此不直接邻接,或者在 情况m = 1,R 4也可以是QY,Q是CF 2,OCF 2,CFH,OCFH或单键,Y是F或Cl,L 1和L 2各自独立地为H或F, m为0或1。