| abstract |
The present invention relates to a liquid crystal medium based on a mixture of polar compounds having + dielectric anisotropy, characterized in that it contains at least one compound of general formula (I)n will be.n n n n n n n n Wherein X is fluorine, chlorine, CF 3 , OCF 3 or OCHF 2 , one of the radicals 1 1 and 1 2 is fluorine, the remaining radicals 1 1 or 1 2 are hydrogen, and in each case R is 7 or less Alkyl, oxaalkyl, fluoroalkyl or alkenyl having a carbon atom of. |