| abstract |
The invention relates to compounds of the formula I, and to a liquid-crystalline medium, preferably having a nematic phase and negative dielectric anisotropy, which comprises n n a) one or more compounds of the formula I n n and b) one or more compounds of the formulae II-1 to II-4, n n n n n n n n n n n n nin which the parameters have the respective meanings indicated in Claim 1, to the use thereof in an electro-optical display, particularly in an active-matrix display based on the VA, ECB, PALC, FFS or IPS effect. |