| 摘要 |
<p>The invention relates to liquid crystalline compounds of formula (I), wherein R1, R2, A1, A2, A3, A4, Z1, Z 2, Z3, a, b and c have the meanings cited in Claim 1, in addition to liquid crystalline media containing at least one compound of (I) and electro-optical displays containing one such liquid crystalline medium.</p> |
