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Liquid-crystalline medium

A technology of liquid crystal medium and medium, which is applied in the direction of liquid crystal materials, instruments, chemical instruments and methods, and can solve problems such as uneven edges

Active Publication Date: 2018-10-09
MERCK PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another visible defect is the so-called spreading or edge non-uniformity associated with the ODF method, especially for large panels such as for TVs, and this is a defect that becomes visible near the edges of the display

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0354] Nematic host mixtures N1 to N6 were prepared as follows:

[0355] Mixture N1

[0356]

[0357] Mixture N2

[0358]

[0359] Mixture N3

[0360]

[0361] Mixture N4

[0362]

[0363] Mixture N5

[0364]

[0365] Mixture N6

[0366]

[0367]

[0368] Mixture Example

[0369]The following mixture examples were prepared from host mixtures N1 to N6 by adding stabilizers of formula ST-1a-2-1 and ST-2a-3 in the amounts given in the table below.

[0370]

[0371]

[0372]

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PUM

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Abstract

The present invention relates to liquid-crystalline media comprising a) one or more compounds of the formula ST-1, and b) one or more compounds of the formula ST-2 and c) one or more compounds of theformula RV and d) one or more compounds selected from the group of compounds of the formulae of the formula IA and IB, in which the occurring groups and parameters have the meanings indicated in claim1, and to liquid-crystal displays containing these media, especially to displays addressed by an active matrix and in particular to displays of the i n- p lane s witching (IPS) or f ringe- f ield s witching (FFS) type.

Description

technical field [0001] The invention relates to liquid crystal media and to liquid crystal displays containing these media, in particular to displays which are addressed by means of an active matrix, and in particular to displays of the in-plane switching (IPS) or fringe field switching (FFS) type. Background technique [0002] Liquid crystal displays (LCDs) are used in many fields for information display. LCDs are used both in direct view displays and in projection displays. Electro-optic modes used are for example twisted nematic (TN), super twisted nematic (STN), optically compensated bending (OCB) and electrically controlled birefringence (ECB) modes and their variants, among others. All of these modes employ an electric field substantially perpendicular to the substrate or liquid crystal layer. In addition to these modes, there are also electro-optic modes employing an electric field substantially parallel to the substrate or liquid crystal layer, such as in-plane swi...

Claims

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Application Information

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IPC IPC(8): C09K19/46
CPCC09K19/46C09K19/20C09K19/3066C09K2019/0466C09K2019/123C09K2019/3004C09K2019/3009C09K2019/3016C09K2019/3027C09K2019/3422G02F1/0045C09K19/54C09K19/0208C09K19/3402C09K19/44C09K19/3483C09K19/3003C09K19/12G02F1/13
Inventor 尹彰晙崔昌锡韩然晶陈熙锡尹容国
Owner MERCK PATENT GMBH
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