abstract |
The present invention relates to a liquid crystal medium based on a mixture of polar compounds having positive dielectric anisotropy, characterized in that it comprises at least one compound of formula 1a and at least one compound of formula 1b: Formula 1a 1b In this formula, R 1 , R 2 , Ring A, L 1 to L 8 , Z 1 , X 1 and X 2 are as defined in claim 1. |