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Liquid crystal composition

A technology of liquid crystal composition and compound, which is applied in the direction of liquid crystal materials, chemical instruments and methods, etc., can solve the problems of narrow phase transition temperature range, poor high and low temperature stability, etc., and achieve wide phase transition temperature range, high stability, Good high and low temperature stability

Active Publication Date: 2015-03-04
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] In recent years, the demand for small and medium-sized TFT-LCD panels for vehicle-mounted displays and medical and industrial instruments has increased rapidly. Since vehicle-mounted displays and industrial instruments are often used under high temperature or severe cold conditions, there are relatively strict requirements for TFT liquid crystal materials. Currently existing liquid crystal display materials generally have defects such as a narrow phase transition temperature range and poor high and low temperature stability.

Method used

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Embodiment 1

[0043] The liquid crystal composition of the present embodiment comprises the following compounds by percentage,

[0044]

[0045]

[0046] The cyclohexyl groups in all the above structural formulas are in the trans configuration. The physical parameters of the composition are as follows:

[0047] Δn=0.102; Δε=8.9; Cp=89°C; V10=1.59V; τ=8.3ms; S→N≤-40°C.

Embodiment 2

[0049] The liquid crystal composition of the present embodiment comprises the following compounds by percentage,

[0050]

[0051]

[0052] The cyclohexyl groups in all the above structural formulas are in the trans configuration. The physical parameters of the composition are as follows:

[0053] Δn=0.073; Δε=4.7; Cp=99°C; V10=2.08V; τ=9.4ms; S→N≤-40°C.

Embodiment 3

[0055] The liquid crystal composition of the present embodiment comprises the following compounds by percentage,

[0056]

[0057]

[0058] The cyclohexyl groups in all the above structural formulas are in the trans configuration. The physical parameters of the composition are as follows:

[0059] Δn=0.118; Δε=4.3; Cp=108°C; V10=2.24V; τ=8.9ms; S→N≤-40°C.

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Abstract

The invention discloses a liquid crystal composition. The liquid crystal composition has a wide phase transition temperature scope, high resistance, high stability, high double refraction anisotropy and rapid response and good high- and low-temperature stability, can still produce fast response at a low temperature of 0-30 DEG C and is especially suitable for industrial control instruments and vehicle-carried TNTFT-LCD. The liquid crystal composition comprises 1-20wt% of a compound I, 1-50wt% of a compound II, 1-30wt% of a compound III, 1-50wt% of a compound IV, 1-20wt% of a compound V and 0.05-0.5wt% of an optical rotation component.

Description

technical field [0001] The invention relates to the field of liquid crystal materials, in particular to a liquid crystal material with a wide phase transition temperature range, high resistivity, high stability, high birefringence anisotropy and fast response characteristics, good high and low temperature stability, and A liquid crystal composition suitable for industrial control instruments and vehicle-mounted liquid crystals that can still achieve rapid response at a low temperature of 0 to -30°C. Background technique [0002] In recent decades, with the rapid development of information technology and people's continuous pursuit of information display methods, liquid crystal display (LCD), as an important application of liquid crystal, has achieved the most rapid development. The optical anisotropy and dielectric anisotropy of the material itself are used to work, and it has been widely used at present. Liquid crystal devices can be designed into different working modes a...

Claims

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Application Information

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IPC IPC(8): C09K19/46
Inventor 李锐乔云霞
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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