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Liquid-crystalline medium

A liquid crystal medium, medium technology, applied in liquid crystal materials, optics, instruments, etc., can solve problems such as display device damage

Active Publication Date: 2019-10-01
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially on cooling, the formation of smectic phases or crystallization is undesirable and may even lead to the destruction of display devices

Method used

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  • Liquid-crystalline medium
  • Liquid-crystalline medium
  • Liquid-crystalline medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0845] The following examples illustrate the invention but do not limit it in any way.

[0846] However, it is clear to those skilled in the art from the physical properties what properties can be achieved and to what extent they can be modified. In particular, combinations of various properties which can preferably be achieved are thus well defined for the person skilled in the art.

[0847] Mixture Example

[0848] Liquid crystal mixtures N1-N14 having the compositions and properties shown in the table below were prepared and characterized with respect to their general physical properties and their suitability in microwave components at 19 GHz and 20°C. These data are given in the table below the composition table for the individual mixture examples.

[0849] Mixture N1

[0850]

[0851] Mixture N2

[0852]

[0853]

[0854] Mixture N3

[0855]

[0856] Mixture N4

[0857]

[0858]

[0859] Mixture N5

[0860]

[0861] Mixture N6

...

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PUM

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Abstract

The present invention relates to liquid-crystalline media comprising one or more compounds of formula T as defined in claim 1, and to high-frequency components comprising these media, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, tunable filters, tunable metamaterial structures, and electronic beam steering antennas (e.g. phased array antennas).

Description

technical field [0001] The present application relates to liquid crystal media and high frequency components containing these media, especially microwave components for high frequency devices, such as devices for changing the phase of microwaves, tunable filters, tunable metamaterial structures and electron beam steering antennas ( such as phased array antennas). Background technique [0002] Liquid crystal media have been used for many years in electro-optic displays (liquid crystal displays: LCD) to display information. More recently, however, liquid-crystalline media have also been proposed for components in microwave technology, for example in DE 10 2004 029 429.1A and JP 2005-120208(A). [0003] As a typical microwave application, for example in D.Dolfi, M.Labeyrie, P.Joffre and J.P.Huignard: Liquid Crystal Microwave Phase Shifter. Electronics Letters, Vol. 29, No. 10, pp. 926-928, 1993 May, N.Martin, N.Tentillier, P.Laurent, B.Splingart, F.Huert, Ph.Gelin, C.Legrand:...

Claims

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Application Information

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IPC IPC(8): C09K19/44G02F1/13H01P1/18H01P1/20H01Q3/30H01Q15/00H01Q21/00
CPCC09K19/44G02F1/13H01Q3/30H01Q21/00H01Q15/0086H01P1/18H01P1/20C09K19/04C09K19/3098C09K2019/0444C09K2019/123C09K2019/181C09K2019/183C09K2019/3016C09K2219/11C09K19/586C09K19/3003C09K19/54C09K2019/0448H01Q1/38H01Q21/22
Inventor D·克拉斯C·弗瑞茨施
Owner MERCK PATENT GMBH
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