| abstract |
The invention relates to liquid-crystalline media based on mixtures of polar compounds with positive dielectric anisotropy, characterized in that the media contain one or more compounds of the formula I in a total concentration of ≥ 40%, wherein the parameters have values between In the meaning indicated in claim 1, the present invention also relates to the use of said liquid-crystal medium for electro-optical purposes, in particular in liquid-crystal light valves for lighting devices of motor vehicles, to liquid-crystal light valves containing said medium A valve, and a lighting device for a motor vehicle comprising such a liquid crystal light valve. |