abstract |
The present invention has the formula (I) A thioether compound of the formula: wherein R 1 , R 2 , X, A 1 , m and Z 1 are the same as defined in claim 1, their preparation, their use as components in liquid crystal media. And an electro-optical display device including a liquid crystal medium according to the present invention. These compounds have a negative dielectric anisotropy. |