| 摘要 |
A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, which comprises one or more compounds of the formula Iwhere R<1>, A<1>, A<2>, Z<1>, Z<2>, L<1>, L<2 >and n are as defined herein, is suitable for use in, for example, MLC, TN and STN displays.
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