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A kind of compound, liquid crystal composition and liquid crystal display

A liquid crystal composition and compound technology, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve the problem of liquid crystal composition clearing point and low dielectric constant, narrow response speed, and liquid crystal display cannot be used under high temperature conditions Problems such as the working temperature range, to achieve the effect of increasing the working temperature range, increasing the dielectric constant, and reducing the driving voltage

Active Publication Date: 2019-01-11
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 and low dielectric constant of the liquid crystal composition in the prior art; the invention also provides a liquid crystal composition and a liquid crystal display which solves the problem that the liquid crystal display cannot Issues with usage and narrow operating temperature range and slower response

Method used

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  • A kind of compound, liquid crystal composition and liquid crystal display
  • A kind of compound, liquid crystal composition and liquid crystal display
  • A kind of compound, liquid crystal composition and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0169] The components of the liquid crystal composition of embodiment 1 and comparative example 1 are as shown in table 1:

[0170] Table 1

[0171]

[0172] 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:

[0173] Table 1-1

[0174] Performance parameters

[0175] 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 composition in Comparative Example 1 and Example 1 is sufficiently low, completely lower than the normal use temperature ra...

Embodiment 2

[0177] The components of the liquid crystal composition of embodiment 2 and comparative example 2 are as shown in table 2:

[0178] Table 2

[0179]

[0180]

[0181] 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:

[0182] Table 2-2

[0183] Performance parameters

[0184] According to the test results of Table 2-2, it can be seen that the compound of the present invention was added to the liquid crystal composition in Example 2, which significantly improved the clarity of the liquid crystal composition compared with Comparative Example 2 without adding the compound of the present invention. Bright spot (Cp), the melting point of the liquid crystal composition is generally below -10°C, the melting point of the liquid crystal composition in Comparative Example 2 and Example 2 is sufficiently low, completely lower than the temperature range of ...

Embodiment 3

[0186] The components of the liquid crystal composition of embodiment 3 and comparative example 3 are as shown in table 3:

[0187] table 3

[0188]

[0189]

[0190] 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:

[0191] Table 3-3

[0192] Performance parameters

[0193] According to the test results of Table 3-3, it can be seen that the compound of the present invention was added to the liquid crystal composition in Example 3, which significantly improved the clarity of the liquid crystal composition compared with Comparative Example 3 without adding the compound of the present invention. Bright spot (Cp), the melting point of the liquid crystal composition is generally below -10°C, the melting point of the liquid crystal composition in Comparative Example 3 and Example 3 is sufficiently low, completely lower than the temperature range of ...

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Abstract

The invention discloses a compound, a liquid crystal composition and a liquid crystal display (LCD). The compound is as shown in the formula I in the specification. In the formula I, R1 and R2 are respectively selected from hydrogen atom, fluorine atom or C1-15 alkyl group or alkoxy group; A1, A2, A3 and A4 are respectively selected from groups as shown in the specification; at least one group in L1, L2 and L3 is -CF2O and other groups are respectively selected from C1-12 alkyl group or alkoxy group; and a, b, c, d, e, f and g are respectively selected from 0 or 1. The liquid crystal composition comprises 1-5 types of the above compound. The LCD contains the above 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 switching 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 there is a problem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D311/96C09K19/44C09K19/34G02F1/1333
Inventor 李志强
Owner FUYANG XINYIHUA MATERIAL TECH
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