| 摘要 |
A liquid-crystalline mediums which contain one or more compounds of the formula A and at least one compound of the formula B wherein compounds of formula A contain at least one ring selected from and in which R<a>, R<b>, ring A and ring B, y, Z<1>, Z<2>, a, L<1>, L<2>, L<3>, L<4>, L<5>, L<6>, L<7>, L<8 >and L<9 >are as defined herein, are suitable for use in twisted nematic (TN) and supertwisted nematic (STN) liquid-crystal displays. Such displays have very short response times and good steepnesses and angle dependencies.
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