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Low-viscosity low-threshold negative liquid crystal composition

A negative liquid crystal, low threshold technology, used in liquid crystal materials, nonlinear optics, optics, etc., to reduce power consumption, low threshold voltage, and improve response speed.

Active Publication Date: 2013-08-21
SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Moreover, there is currently no single liquid crystal compound used alone in liquid crystal displays that can meet the performance requirements of liquid crystal displays without being combined with other liquid crystal compounds.

Method used

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  • Low-viscosity low-threshold negative liquid crystal composition
  • Low-viscosity low-threshold negative liquid crystal composition
  • Low-viscosity low-threshold negative liquid crystal composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The components and their proportions in the liquid crystal composition are shown in Table 1 below:

[0043] Table 1

[0044]

[0045]

[0046]

[0047] The physical parameters of the liquid crystal composition of embodiment 1 are respectively:

[0048] c.p.: 70°C; Δn: 0.077; Δε: -11.3; η: 60cp.

Embodiment 2

[0050] The components of the liquid crystal composition and their ratios are shown in Table 2 below:

[0051] Table 2

[0052]

[0053]

[0054] Each physical parameter of the liquid crystal composition of embodiment 2 is respectively:

[0055]c.p.: 110°C; Δn: 0.105; Δε: -6.5; η: 65cp.

Embodiment 3

[0057] The components and proportions of the liquid crystal composition are shown in Table 3 below:

[0058] table 3

[0059]

[0060]

[0061] Each physical parameter of the liquid crystal composition of embodiment 3 is respectively:

[0062] c.p.: 95°C; Δn: 0.155; Δε: -5.1; η: 40cp.

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PUM

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Abstract

The invention discloses a low-viscosity low-threshold negative liquid crystal composition which comprises 1-50% of at least one compound shown as general formula I in percentage by mass, wherein R1 and R2 are one of C2-5 alkyl chain, C2-5 alkoxy and C2-5 alkenyl chain of which an olefinic bond is not directly connected with an oxygen atom or benzene ring. The liquid crystal composition has large and negative dielectric constant, low threshold voltage and viscosity, wide nematic phase temperature range, favorable compatibility, favorable ultraviolet resistance and high temperature resistance, and is applicable to VA (vertical alignment) mode liquid crystal displays having requirements for high response speed and low power consumption.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a negative liquid crystal composition with low viscosity and low threshold value. Background technique [0002] Since the liquid crystal composition has excellent optical anisotropy and electrical anisotropy, is controlled by an electric field, and has low power consumption, it has been widely used as an important display material to prepare liquid crystal displays. With the mature use of thin film transistor technology, liquid crystal display devices have gradually begun to be used in fields closely related to people's lives, such as mobile phones and televisions. [0003] For liquid crystal display devices, according to the different display modes of liquid crystals, its types can be divided into PC (phase change, phase change), TN (twist nematic, twisted nematic), STN (super twisted nematic, super twisted nematic) , OCB (optical compensated bend), VA (vertical alignment, vertic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/46C09K19/44G02F1/1333
Inventor 贾刚刚韩耀华华瑞茂孟劲松乔云霞贵丽红
Owner SHIJIAZHUANG CHENGZHI YONGHUA DISPLAY MATERIALS CO LTD
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