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Wide nematic phase temperature range mixed liquid crystal material with quick response under low temperature

A fast response, temperature range technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of low clearing point, long response time, high melting point, wide temperature range of nematic phase, fast response speed at low temperature, The effect of low drive voltage

Inactive Publication Date: 2013-10-02
INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problems of high melting point, low clearing point, high viscosity and long response time at low temperature of existing liquid crystal materials, and provide a wide nematic phase temperature range mixed liquid crystal material with fast response at low temperature

Method used

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  • Wide nematic phase temperature range mixed liquid crystal material with quick response under low temperature
  • Wide nematic phase temperature range mixed liquid crystal material with quick response under low temperature
  • Wide nematic phase temperature range mixed liquid crystal material with quick response under low temperature

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specific Embodiment approach 1

[0012] Specific Embodiment 1: In this embodiment, an alkylcyclohexylbenzene bicyclic compound, 20 %~45% polar group substituted alkylbicyclohexylbenzene tricyclic compound, 1%~5% polar group containing bridge bond substituted alkylcyclohexylbiphenyl tricyclic compound and 0~ 5% of bridge-containing alkylcyclohexylphenyl biphenyl compounds, and the sum of the mass percentages of the above components is 100%;

[0013] The structural formula of the alkylcyclohexylbenzene bicyclic compound substituted by the polar group is where R 1 n-alkyl, terminal alkenyl or terminal alkynyl of 1 to 7 carbon atoms; X 1 -H, -NCS, -F, -Cl, -CN, -CF 3 or -OCH 3 ; All 1- and 4-substituted cyclohexyl groups are trans structures;

[0014] The structural formula of the alkyl bicyclohexylbenzene tricyclic compound substituted by the polar group is where R 2 n-alkyl, terminal alkenyl or terminal alkynyl of 1 to 7 carbon atoms; X 2 -H, -NCS, -F, -Cl, -CN, -CF 3 or -OCH 3 ; All 1- and 4-substi...

specific Embodiment approach 2

[0022] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the structural formula of the polar group substituted alkylcyclohexylbenzene bicyclic compound is: one or a mixture of several. Others are the same as in the first embodiment.

[0023] When the structural formula of the polar group-substituted alkylcyclohexylbenzene bicyclic compound described in this embodiment is a mixture, each substance is mixed in any proportion.

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the structural formula of the polar group-substituted alkyl bicyclohexylbenzene tricyclic compound is: one or a mixture of several of them. Others are the same as in the first or second embodiment.

[0025] When the structural formula of the polar group-substituted alkylbicyclohexylbenzene tricyclic compound described in this embodiment is a mixture, each substance is mixed in any proportion.

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Abstract

The invention belongs to the technical field of liquid crystal material, and particularly relates to wide nematic phase temperature range mixed liquid crystal material with quick response under low temperature, which aims at solving the problems of high melting point, low clearing point, and large viscosity and long response time under a low temperature situation of existing liquid crystal material. The wide nematic phase temperature range mixed liquid crystal material with quick response under the low temperature is prepared by polar group substituted alkyl cyclohexyl benzene bicyclic compound, polar group substituted alkyl dicyclohexyl benzene tricyclic compound, bridged bond-containing polar group substituted alkyl cyclohexyl biphenyl tricyclic compound and bridged bond-containing alkyl cyclohexyl biphenyl compound. The wide nematic phase temperature range mixed liquid crystal material with quick response under the low temperature, disclosed by the invention, can be used for preparing display devices such as an instrument and a meter which are used in an extremely-cold environment.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, and in particular relates to a mixed liquid crystal material with a wide nematic phase temperature range and fast response at low temperature. Background technique [0002] With the development of information technology, display technology has become an important way of human-computer interaction. The development of CRT display technology has gone through cathode ray tube display, liquid crystal display, plasma display and current OLED display technology. With its advantages of low power consumption, wide viewing angle, portability, and no radiation, liquid crystal display has gradually replaced CRT display technology and occupied almost all market shares. With the continuous innovation of liquid crystal materials and liquid crystal display technology, liquid crystal displays have been developed in the direction of full viewing angle, large size, high contrast and fast response....

Claims

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Application Information

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IPC IPC(8): C09K19/30
Inventor 吕宏飞白雪峰杨杰李猛徐虹单雯妍王艳华李淑辉张惠
Owner INST OF PETROCHEM HEILONGJIANG ACADEMY OF SCI
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