Abstract: Liquid-crystalline medium having a dielectric anisotropy ?? of ?3, comprising compounds of the general formula (I), in which R is as defined herein, are suitable for use as liquid-crystalline media for, e.g., IPS, MLC, TN or STN displays, but in particular for LCoS displays. The media have very high specific resistance values, low threshold voltages, short response times and high birefringence values ?n, while maintaining other boundary conditions.

Abstract: Liquid crystalline media comprising a dielectrically positive component, component A, containing dielectrically positive compounds, comprising one or more compounds of formula I and one or more compounds of formula II and one or more dielectrically neutral compounds of formula IVb wherein the parameters have the meaning defined therein; and wherein two of the 6-membered rings in formula IVb may optionally be linked by an group selected from —CH2—CH2—, —CF2—CF2—, —CF2—O—, —O—CF2— and —CO—O— are sutiable for use in liquid crystal displays, especially active matrix displays.

Abstract: Liquid-crystalline medium having a dielectric anisotropy &Dgr;&egr; of ≧3, comprising compounds of the general formula (I), 1

Abstract: Liquid crystalline media comprising a dielectrically positive component, component A, containing dielectrically positive compounds, comprising one or more compounds of formula I and one or more compounds of formula II 1