Liquid crystal composition and display device thereof

A liquid crystal composition and technology of the composition, applied in the directions of liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of loss of low-boiling point substances, inability to better maintain the properties of liquid crystal materials, volatilization, etc.

Active Publication Date: 2018-07-03
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the manufacturing process of liquid crystal display elements, when injecting the liquid crystal composition into the liquid crystal cell, the compound with low vapor pressure will volatilize due to the extremely low pressure, so it is considered impossible to increase the content of the compound with low vapor pressure
[0017] Moreover, in the production process of the liquid crystal display panel, when the liquid crystal material is dropped, it is in a very low pressure environment, and the air pressure is generally <1Pa, which will cause the low boiling point substances in the liquid crystal material to volatilize.
When the contact area between the liquid crystal material and the environment is larger, the compound with low vapor pressure will volatilize more. Therefore, a larger diffusion area will lead to the loss of low boiling point substances during the production process of the liquid crystal display panel, and it will not be possible to better maintain the liquid crystal material. the nature of

Method used

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  • Liquid crystal composition and display device thereof
  • Liquid crystal composition and display device thereof
  • Liquid crystal composition and display device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] The liquid crystal composition of Example 1 was prepared by each compound listed in Table 3 and the weight percentage, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0125] Table 3 liquid crystal composition formula and test performance thereof

[0126]

[0127] Comparing Example 1 and Comparative Example 1, it can be found that the negative liquid crystal composition of the present invention has greater dielectric anisotropy, smaller diffusion area, greater transmittance and better low-temperature mutual solubility .

Embodiment 2

[0133] The liquid crystal composition of Example 3 was prepared by each compound listed in Table 5 and the weight percentage, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0134] Table 5 liquid crystal composition formula and test performance thereof

[0135]

[0136] Comparing Example 2 and Comparative Example 2, it can be found that the negative liquid crystal composition of the present invention has greater dielectric anisotropy, smaller diffusion area, greater transmittance and better low-temperature mutual solubility .

Embodiment 3

[0142] The liquid crystal composition of Example 3 was formulated according to the compounds and weight percentages listed in Table 7, which was filled between the two substrates of the liquid crystal display for performance testing. The test data are shown in the following table:

[0143] Table 7 liquid crystal composition formula and test performance thereof

[0144]

[0145] Comparing Example 3 and Comparative Example 3, it can be found that the negative liquid crystal composition of the present invention has greater dielectric anisotropy, smaller diffusion area, greater transmittance and better low-temperature mutual solubility .

[0146] As can be seen from the above comparative examples and examples, the negative liquid crystal composition of the present invention has a larger absolute value of dielectric anisotropy, higher optical anisotropy, a suitably high clearing point, and higher penetration High efficiency, good low temperature stability and small diffusion ar...

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Abstract

The invention discloses a liquid crystal composition with negative dielectric anisotropy. The liquid crystal composition contains the following compounds in percentage by total weight of the negativeliquid crystal composition: 20%-65% of one or more compounds of a general formula I-1 and/or a general formula I-2, 10%-40% of one or more compounds of a general formula II, 13%-40% of one or more compounds of a general formula III and 20%-60% of one or more compounds of a general formula IV. The invention further discloses a liquid crystal display containing the liquid crystal composition. The formulae are shown in the descrption.

Description

technical field [0001] The invention relates to a liquid crystal composition, in particular to a liquid crystal composition with suitable clearing point, high optical anisotropy, large dielectric anisotropy, good low temperature stability, high transmittance and small A liquid crystal composition with characteristics such as diffusion area, and a liquid crystal display device comprising the liquid crystal composition. Background technique [0002] Liquid crystal display elements have developed from clocks and calculators to various electrical appliances for household use, measurement equipment, automotive panels, word processors, electronic notebooks, printers, computers, televisions, etc. As a representative liquid crystal display method, it can include TN (twisted nematic) type, STN type (super twisted nematic) type, DS (dynamic light scattering) type, GH (guest-host) type, IPS (in-plane switching) type, OCB (Optically Compensated Birefringence) type, ECB (Voltage Control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44G02F1/1333
CPCG02F1/1333C09K19/44
Inventor 马文阳徐海彬韩文明陈昭远
Owner JIANGSU HECHENG DISPLAY TECHCO
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