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Liquid crystal composition and liquid crystal display element using same

A technology for liquid crystal display elements and liquid crystal compositions, applied in the directions of liquid crystal materials, chemical instruments and methods, can solve the problems of display burn-in and insufficient effect, and achieve the effects of less screen burn-in and excellent high-speed response.

Inactive Publication Date: 2016-06-22
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, there is a problem of display burn-in caused by the polymeric compound added to the liquid crystal, and the effect of suppressing drip marks is not sufficient. It is necessary to develop a liquid crystal display device that maintains the basic characteristics of the liquid crystal display element and is difficult to use. Liquid crystal display elements with burn-in and drop marks

Method used

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  • Liquid crystal composition and liquid crystal display element using same
  • Liquid crystal composition and liquid crystal display element using same
  • Liquid crystal composition and liquid crystal display element using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0246] A liquid crystal composition (Example 1) having the composition shown below was prepared, and its physical property values ​​were measured. The results are shown in the table below.

[0247] Using the liquid crystal composition of Example 1, a VA liquid crystal display element was produced. This liquid crystal display element has an anti-overlap type thin film transistor as an active element. The injection of the liquid crystal composition was performed by a dropping method, and evaluations of burn-in, drop marks, process suitability, and solubility at low temperatures were performed.

[0248] In addition, the symbol on the left side of the content is the description of the abbreviated symbol of the said compound.

[0249] [chem 28]

[0250] Example 1

[0251]

[0252] [Table 1]

[0253] T NI / ℃

[0254] It can be seen that the liquid crystal composition of Example 1 has a liquid crystal phase temperature range of 75.3°C, which is practical as a liquid...

Embodiment 2

[0273] A liquid crystal composition having the composition shown below, designed to have a liquid crystal phase temperature range equivalent to that of the composition of Example 1, an equivalent refractive index anisotropy value, and an equivalent dielectric constant anisotropy value (implementation Example 2), measure its physical property value. The results are shown in the table below.

[0274] Using the liquid crystal composition of Example 2, a VA liquid crystal display element was produced in the same manner as in Example 1, and the evaluation results of burn-in, drop marks, process suitability, and solubility at low temperatures are shown in the same table.

[0275] [Table 4]

[0276] Example 2

[0277] 3-Cy-Cy-V

[0278] It can be seen that the liquid crystal composition of Example 2 has a practical liquid crystal phase temperature range as a TV liquid crystal composition, has a large absolute value of dielectric constant anisotropy, has low viscosity, and...

Embodiment 3 and Embodiment 4

[0287] A liquid crystal composition having the composition shown below, designed to have a liquid crystal phase temperature range equivalent to that of the composition of Example 1, an equivalent refractive index anisotropy value, and an equivalent dielectric constant anisotropy value (implementation Example 3 and embodiment 4), measure its physical property value. The results are shown in the table below.

[0288] Using the liquid crystal composition of Example 3 and Example 4, a VA liquid crystal display element was produced in the same manner as in Example 1, and the evaluation results of burn-in, drop marks, process suitability, and solubility at low temperatures are shown in the same table. middle.

[0289] [Table 6]

[0290]

[0291]It can be seen that the liquid crystal composition of Example 3 has a practical liquid crystal phase temperature range as a TV liquid crystal composition, has a large absolute value of dielectric constant anisotropy, has low viscosity, a...

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Abstract

The invention aims to provide a liquid crystal composition and a liquid crystal display element using the same.The liquid crystal composition is suitable for liquid crystal display elements without lowering dielectric constant anisotropism, viscosity, nematic phase upper limite temperature, nematic phase stability at low temperature and gamma 1 serving as various characteristics of the liquid crystal display elements and screen burning characteristics of display elements, being difficult to generate drip marks during manufacturing and realizing stable liquid crystal material ejection during an ODF process.The invention provides the liquid crystal composition contains one or more than two compounds shown as an above general formula (I), contains one or more than two compounds shown as an above general formula (II) and has negative dielectric constant anisotropism.The invention further provides the liquid crystal display element using the liquid crystal composition.

Description

[0001] This application is a divisional application of the original application, the application date is March 26, 2013, the application number is 201380003438.9, and the invention title is "liquid crystal composition and liquid crystal display element using the same". technical field [0002] The present invention relates to a liquid crystal composition and a liquid crystal display element useful as constituent members of a liquid crystal display device or the like. Background technique [0003] Liquid crystal display elements have developed from clocks and calculators to various measuring instruments, automotive panels, word processors, electronic notepads, printers, computers, televisions, clocks, advertising display boards, etc. Typical liquid crystal display methods include TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, VA (Vertical Alignment) type using TFT (Thin Film Transistor), and IPS (In-Plane Switching) type. type etc. The liquid crystal compositio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44
CPCC09K19/44C09K2019/123C09K2019/3004C09K2019/301C09K2019/3027
Inventor 岩下芳典根岸真
Owner DIC CORP
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