Liquid crystal composition for active matrix driven liquid crystal display

A liquid crystal composition and compound technology, applied in liquid crystal materials, optics, instruments, etc.

Active Publication Date: 2013-11-27
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] No single liquid crystal compound can meet the requirements of various working modes of liquid crystal display at the same time

Method used

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  • Liquid crystal composition for active matrix driven liquid crystal display
  • Liquid crystal composition for active matrix driven liquid crystal display
  • Liquid crystal composition for active matrix driven liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0137] Mix the compounds uniformly according to the following mass percentages to obtain a liquid crystal composition:

[0138]

[0139] The physical parameter test result of this liquid crystal composition is as follows:

[0140] CP=82℃; Δn=0.101; Δε=3.8; V 10 =2.07V; V 90 = 3.12V; gamma 1 =67.

[0141] From the above results, it can be seen that the composition has a lower rotational viscosity γ 1 , threshold V 10 lower (see image 3 ), fast response time (see figure 2 ), viewing angle characteristics such as figure 1 As shown, it is a liquid crystal composition with better comprehensive performance, which is suitable for TFT-driven liquid crystal display.

Embodiment 2

[0143] Mix the compounds uniformly according to the following mass percentages to obtain a liquid crystal composition:

[0144]

[0145] The physical parameter test result of this liquid crystal composition is as follows:

[0146] Δn=0.118, CP=75.8°C, V10=2.08, V90=2.95, Δε=4.43, γ 1 = 46.2.

[0147] It can be known from the above that the composition contains the five-membered ring compound represented by F-1, V10 and V90 are reduced, and the clearing point is slightly increased, and these parameter changes are beneficial to improving the performance of an active matrix-driven liquid crystal display.

Embodiment 3

[0149] Mix the compounds uniformly according to the following mass percentages to obtain a liquid crystal composition:

[0150]

[0151]

[0152] The physical parameter test result of this liquid crystal composition is as follows:

[0153] CP=83℃; Δn=0.102; Δε=3.9; V 10 = 2.04V; V 90 = 3.08V; γ 1 =68.

[0154] From the above results, it can be seen that the composition has a lower rotational viscosity γ 1 =68, threshold V 10 The mixed liquid crystal composition with relatively low cost and good overall performance is suitable for liquid crystal displays driven by active matrix.

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Abstract

The invention discloses a liquid crystal composition for active matrix driven liquid crystal display. The composition contains compounds shown in formulas I-III. According to the invention, a liquid crystal composition taking a difluoromethoxy-bridge simultaneously containing cyclopentyl in molecules thereof as a connecting group is used for improving the comprehensive performance of liquid crystal compositions so as to obtain different optimal combinations for meeting the needs of different display modes, therefore, the liquid crystal composition has an important practical value.

Description

technical field [0001] The invention relates to a liquid crystal composition for active matrix driving liquid crystal display. Background technique [0002] Using different characteristics and working modes of liquid crystal materials, liquid crystal display devices can be designed into various working modes. Such as twisted nematic mode, super twisted nematic mode, super twisted birefringent mode, electrically controlled birefringent mode, in-plane conversion mode, etc. [0003] In high-information display, active matrix (AM) driving is generally used, and thin-film transistor (TFT) is mostly used for driving at present. [0004] In AM-TFT components, TFT switching devices are addressed in a matrix manner, and when the voltage changes during the non-conduction period, the light transmittance of the pixel will change, resulting in a decrease in display quality. In order to overcome this phenomenon, the liquid crystal material is required to have a higher voltage retention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44C09K19/30G02F1/1333
Inventor 华瑞茂王奎贠国良贵丽红杨增家
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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