abstract |
The invention relates to compounds of the formula I n nin which R 1 and X 1 have the meanings indicated in Claim 1, and to a liquid-crystalline medium comprising at least one compound of the formula I, and to the use thereof in electro-optical liquid-crystal displays, in particular in TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS or PS-FFS-, posi-tive VA displays and in shutter spectacles for 3D effects and LC lenses. |