| 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 <CHEM> 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 CH2 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 CF2, OCF2, 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.
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