Abstract: Isothiocyanato tolane derivatives of formula I-1 and liquid-crystalline media comprising same are suitable for use in high-frequency components, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas.

Abstract: A steerable antenna having a plurality of radiating elements and a plurality of modifier elements configured for shifting phase and/or adjusting amplitude of a signal to be emitted by the radiating elements is disclosed. Each of the radiating elements is coupled to one of the modifier elements, wherein the modifier elements each comprise a liquid crystalline medium and wherein the modifier elements are configured such that the adjustment of the phase and/or amplitude is dependent on a state of the liquid crystalline medium. The steerable antenna further comprises a signal generator connected to the modifier elements and configured for generating a signal suited for dielectric heating of the liquid crystalline media of the modifier elements. Further aspects relate to a method for heating and/or controlling the temperature of the liquid crystalline medium of such a steerable antenna.

Abstract: The present invention relates to liquid-crystalline media comprising one or more compounds of formula DFS in which the groups and parameters occurring have the meanings indicated in claim 1, to high-frequency components comprising same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas. The present invention further relates to novel mesogenic compounds.

Abstract: The present invention relates to liquid-crystalline media comprising one or more chiral compounds and one or more compounds selected from the group of compounds of formulae I, II and III, in which the parameters have the meaning indicated in claim 1, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

Abstract: Liquid-crystalline media comprising one or more compounds of formula G and one or more compounds selected from the group of compounds of formulae I, II and III, in which the parameters have the meaning indicated in claim 1, and components comprising these media, are suitable for use in high-frequency technology, in particular, in phase shifters and microwave array antennas.

Abstract: The present invention relates to liquid-crystalline media comprising one or more pleochroic compounds, and one or more compounds selected from the group of compounds of formulae I, II and III, in which the groups have the meanings as set forth in claim 1, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

Abstract: The invention relates to a liquid-crystalline medium based on a mixture of polar compounds having positive dielectric anisotropy, characterised in that it comprises one or more compounds of the formula I in a total concentration of ?40%, in which the parameters have the meanings indicated in claim 1, and to the use of the liquid-crystalline medium for electro-optical purposes, in particular in liquid-crystal light valves for lighting devices for motor vehicles, and to liquid-crystal light valves which comprise this medium and lighting devices for motor vehicles which contain such liquid-crystal light valves.

Abstract: The present invention relates to a liquid-crystalline medium having a clearing point of 120° C. or more, comprising one or more compounds selected from the group of the compounds of the formulae IA, IB, IC, ID and II in which the groups and parameters occurring have the meanings indicated in Claim 1, in a total concentration of 65% or more, and to the use thereof for electro-optical purposes, in particular for liquid-crystal light valves for use in lighting devices for motor vehicles, to liquid-crystal light valves containing this medium, and to lighting devices based on liquid-crystal light valves of this type.

Abstract: The present invention relates to isothiocyanato tolane derivatives of formula I in which the occurring groups have the meanings indicated in claim 1, to a process for their preparation, to liquid-crystalline media comprising same and to high-frequency components comprising these media, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas.

Abstract: The present invention relates to liquid-crystalline media comprising one or more compounds selected from the group of compounds of formula I in which the parameters have the meaning indicated in Claim 1, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

Abstract: The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula CC in which the groups occurring have the meanings indicated in Claim 1, and to the use of the liquid-crystalline medium for electro-optical purposes, in particular in liquid-crystal light valves for lighting devices for vehicles, and to liquid-crystal light valves which comprise this medium and lighting devices for vehicles which contain liquid-crystal light valves of this type.

Abstract: Liquid-crystalline media containing one or more compounds of formulae I-1, I-2 and/or I-3 and one or more compounds of formulae II and/or III and components containing these media for high-frequency technology, in particular phase shifters and microwave array antennas.

Abstract: The present invention relates to liquid-crystalline media comprising one or more pleochroic compounds, and one or more compounds selected from the group of compounds of formulae I, II and III, in which the groups have the meanings as set forth in claim 1, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

Abstract: The present invention relates to dielectrically positive liquid-crystalline media comprising one or more compounds of the formula I, and one or more compounds selected from the group of the compounds of the formulae II and III and/or IV, in which the parameters have the respective meanings indicated in the specification, and optionally one or more further dielectrically positive compounds and optionally one or more further dielectrically neutral compounds, and to liquid-crystal displays, especially active-matrix displays and in particular TN, IPS and FFS displays, containing these media.

Abstract: The present invention relates to liquid-crystalline media comprising one or more compounds selected from the group of compounds of formulae I, II and III, in which the parameters R1-R3, Z21, Z31, Z32 and rings A11, A12, A13, A21, A22, A31, and A32 are as defined herein, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

Abstract: The present invention relates to liquid-crystalline media comprising one or more compounds of formula T and one or more compounds selected from the group of compounds of formulae I, II and III, in which the parameters have the meaning indicated in Claim 1, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

Abstract: The invention relates to a liquid crystalline medium, characterised in that it comprises one or more compounds of formula A and one or more compounds of formula II wherein the parameters have the meaning indicated in claim 1, and to high-frequency components comprising the same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular microwave phased-array antennas.

Abstract: The present invention relates to mesogenic media and to electro-optical displays comprising these media as light modulation media. In particular, the electro-optical displays according to the present invention are displays, which are operated at a temperature, at which the mesogenic modulation media are in an optically isotropic phase, preferably in a blue phase.

Abstract: The present invention relates to liquid-crystalline media comprising one or more polymerisable compounds, preferably of formula P Pa-(Spa)s1-(A1-Z1)n1-A2-Q-A3-(Z4-A4)n2-(Spb)s2-Pb??P and one or more compounds selected from the group of compounds of formulae I, II, and III, in which the parameters have the meaning indicated in Claim 1, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

Abstract: The present invention relates to liquid-crystalline media comprising one or more compounds of formula DFS in which the groups and parameters occurring have the meanings indicated in claim 1, to high-frequency components comprising same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas. The present invention further relates to novel mesogenic compounds.