| 摘要 |
A liquid-crystal medium comprising a) at least one compound of the formula I and b) at least one compound of the formula II wherein R11, R12, R21, R22, A1, A21, Z21, Z22, L21, L22 and I are as defined herein are suitable for use in ECB, VAN, IPS, GH and ASM-PA LCD displays.
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