| 摘要 |
The invention relates to a liquid crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it contains one or more fluorinated terphenyls having the formula I <IMAGE> I and one or more compounds of the formula II <IMAGE> II wherein R and R' are each independently an alkyl or alkenyl radical having up to 12 C atoms, optionally substituted by halogen, at least one CH2 group optionally independently replaced by -O-, -CO-O- or -O-CO- in such a manner that oxygen atoms are not linked directly to one another, X and X' are each independently of one another F, Cl, CF3, OCF3 or OCHF2, and L1 and L2 are each independently of one another H or F.
|
