Liquid crystalline medium

摘要

The present invention relates to a liquid crystalline mixture comprising a) 1-25% by weight of at least one compound of the formula I b) 5-80% by weight of at least one compound of the formula II c) and optionally 1-20% by weight of at least one chiral compound with a HTP of <=20 mum, wherein R¹¹, A¹¹, Z¹¹, A¹², Z¹², L¹¹, L¹², L¹³, L¹⁴, Z¹³, A¹³, Z¹⁴, A¹⁴, X¹¹, a, b, c, d, R¹², A¹, Z¹, A², Z², A³, L¹, L², X¹², m and n have the meanings given in claim 1 and their use in TFT, TN, IPS applications and expecially for devices utilizing electro-optical effects in an optically isotropic state.