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Compound, liquid crystal composition and liquid crystal display

A technology for liquid crystal compositions and compounds, applied in the directions of liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problems of low clearing point of liquid crystal compositions and the inability of liquid crystal displays to use the working temperature range under high temperature conditions, and achieves improved performance. Operating temperature range, high-definition highlights, improved effect of clearing points

Active Publication Date: 2017-03-29
FUYANG XINYIHUA MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a liquid crystal compound which solves the problem of low clearing point of the liquid crystal composition in the prior art; provides a liquid crystal composition and a liquid crystal display which solves the problem that the liquid crystal display cannot be used in a high temperature state and has a narrow working temperature range The problem

Method used

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  • Compound, liquid crystal composition and liquid crystal display
  • Compound, liquid crystal composition and liquid crystal display
  • Compound, liquid crystal composition and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0131] The components of the liquid crystal composition of embodiment 1 and comparative example 1 are as shown in table 1:

[0132] Table 1

[0133]

[0134]

[0135] A series of performance tests were carried out on the liquid crystal compositions of Example 1 and Comparative Example 1, and the test results are shown in Table 1-1:

[0136] Table 1-1

[0137] performance parameters Example 1 Comparative example 1 Cp 92℃ 85℃ Δn 0.189 0.109 Δε 7.6 7.8 gamma 1

[0138] According to the test results in Table 1-1, it can be seen that the compound of the present invention was added to the liquid crystal composition in Example 1, which significantly improved the clarity of the liquid crystal composition compared with Comparative Example 1 in which the compound of the present invention was not added. Bright spot (Cp), the melting point of the liquid crystal composition is generally below -10°C, the melting point of the liquid crystal co...

Embodiment 2

[0140] The components of the liquid crystal composition of embodiment 2 and comparative example 2 are as shown in table 2:

[0141] Table 2

[0142]

[0143]

[0144] A series of performance tests were carried out on the liquid crystal compositions of Example 2 and Comparative Example 2, and the test results are shown in Table 2-2:

[0145] Table 2-2

[0146] performance parameters Example 2 Comparative example 2 Cp 92℃ 85℃ Δn 0.179 0.182 Δε 7.9 7.8 gamma 1

[0147] According to the test results of Table 2-2, it can be seen that the compound of the present invention was added in Example 2, compared with Comparative Example 2 without adding the compound of the present invention, the clearing point (Cp) of the liquid crystal composition was improved, and the liquid crystal composition The melting point of the compound is generally below -10°C. The melting points of the liquid crystal compositions in Comparative Example 2 and Examp...

Embodiment 3

[0149] The components of the liquid crystal composition of embodiment 3 and comparative example 3 are as shown in table 3:

[0150] table 3

[0151]

[0152]

[0153] A series of performance tests were carried out on the liquid crystal compositions of Example 3 and Comparative Example 3, and the test results are shown in Table 3-3:

[0154] Table 3-3

[0155] performance parameters Example 3 Comparative example 3 C p

[0156] According to the test results of Table 3-3, it can be seen that the compound of the present invention was added in Example 3, compared with Comparative Example 3 without adding the compound of the present invention, the clearing point (Cp) of the liquid crystal composition was improved, and the liquid crystal composition The melting point of the compound is generally below -10°C. The melting points of the liquid crystal compositions in Comparative Example 3 and Example 3 are all sufficiently low, completely lower than the tempera...

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Abstract

The invention discloses a compound, a liquid crystal composition and a liquid crystal display. The compound is represented by formula I shown in the description. In the formula I, R1 and R2 are respectively independently selected from the hydrogen atom and C1-15 alkyl or alkyloxy groups; A, B and C are respectively independently selected from groups also shown in the description; Z1 and Z2 are respectively independently selected from a single bond, -CH=CH-, a carbon-carbon triple bond, -COO-, -OOC-, -CF2O-, -OCH2-, -CH2O-, -OCF2-, -CH2CH2-, -CF2CH2-, -CH2CF2-, -C2F4-, -(CH2)4- and -CF=CF-; and a, b, c, d and e are respectively independently selected from 0, 1 and 2. The liquid crystal composition at least comprises the compound. The liquid crystal display includes the liquid crystal composition.

Description

technical field [0001] The invention relates to the field of liquid crystal displays, in particular to a compound, a liquid crystal composition and a liquid crystal display. Background technique [0002] According to different display methods, liquid crystal displays are divided into dynamic flash type, twisted type, super twisted type and plane conversion type. Although different types of liquid crystal displays require liquid crystal compositions to have different properties, they are also required to have the following common features: proper optical anisotropy, proper rotational viscosity and fast response speed. [0003] The liquid crystal composition is prepared by mixing various liquid crystal compounds, so the properties of the liquid crystal compound monomers are particularly important. Due to the low clearing point of the existing liquid crystal composition, it cannot meet the requirements of liquid crystal displays used at high temperatures, and has the problem o...

Claims

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Application Information

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IPC IPC(8): C07D471/08C09K19/34G02F1/1333
CPCC07D471/08C09K19/3483G02F1/1333
Inventor 李心力
Owner FUYANG XINYIHUA MATERIAL TECH
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