申请人:Heckmeier Michael
公开号:US20070269614A1
公开(公告)日:2007-11-22
Liquid-crystalline compounds of the formula I
in which
R
1
, A
1
, A
2
, Z
1
, Z
2
, X, a, b, L
1
, L
2
and L
3
are as defined herein, and to liquid-crystalline media comprising at least one compound of the formula I and to electro-optical displays containing a liquid-crystalline medium of this type.