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Liquid crystal composition, liquid crystal display element and liquid crystal display

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

Active Publication Date: 2016-08-10
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the problem of display burn-in caused by the polymeric compound added to the liquid crystal, and its effect on suppressing drip marks is not sufficient. It is necessary to maintain the basic characteristics of the liquid crystal display element while preventing burn-in Development of liquid crystal display element with drip marks

Method used

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  • Liquid crystal composition, liquid crystal display element and liquid crystal display
  • Liquid crystal composition, liquid crystal display element and liquid crystal display
  • Liquid crystal composition, liquid crystal display element and liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0239] A liquid crystal composition (Example 1) having the following composition was prepared, and its physical property values ​​were measured. The results are shown in the table below.

[0240] A VA liquid crystal display element was produced using the liquid crystal composition of Example 1. This liquid crystal display element has an inverted stagger 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.

[0241] In addition, the symbol on the left side of content describes the abbreviation of the said compound.

[0242] [chem 25]

[0243] Example 1

[0244]

[0245] [Table 1]

[0246] T NI / ℃

[0247] It can be seen that the liquid crystal composition of Example 1 has a liquid crystal phase temperature range of 75.0° C. which is practical as a liquid crystal composition ...

Embodiment 2 and Embodiment 3

[0266] A liquid crystal composition having the following composition designed so as to have the same liquid crystal phase temperature range, the same refractive index anisotropy value, and the same dielectric constant anisotropy value as the composition of Example 1 was prepared ( Embodiment 2 and embodiment 3), measure its physical property value. The results are shown in the table below.

[0267] Using the liquid crystal compositions of Example 2 and Example 3, a VA liquid crystal display element was produced in the same manner as in Example 1, and the results of evaluation of burn-in, drop marks, process suitability, and solubility at low temperatures are shown in the same table. middle.

[0268] [Table 4]

[0269]

[0270] It can be seen that the liquid crystal composition of Example 2 has a liquid crystal phase temperature range practical as a liquid crystal composition for TV, has a large absolute value of dielectric constant anisotropy, has low viscosity and optima...

Embodiment 4 and Embodiment 5

[0273] A liquid crystal composition having the following composition designed so as to have the same liquid crystal phase temperature range, the same refractive index anisotropy value, and the same dielectric constant anisotropy value as the composition of Example 1 was prepared ( Embodiment 4 and embodiment 5), measure its physical property value. The results are shown in the table below.

[0274] Using the liquid crystal composition of Example 4 and Example 5, a VA liquid crystal display element was produced in the same manner as in Example 1, and the results of evaluation of burn-in, drop marks, process suitability, and solubility at low temperatures are shown in the same table. middle.

[0275] [table 5]

[0276]

[0277] It can be seen that the liquid crystal composition of Example 4 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 optimal Δn....

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Abstract

The invention relates to a liquid crystal composition, a liquid crystal display element and a liquid crystal display .The liquid crystal composition with the dielectric constant anisotropism being negative is characterized by containing one or two or more compounds selected from a compound group shown in the formula (I) and one or two or more compounds selected from a compound group shown in the formula (II), wherein in the formulas, R11 represents alkyl with the carbon number of 1-3, R22 represents alkyl or a hydrogen atom with the carbon number of 1-3, and R1 and R2 independently represent alkyl with the carbon number of 1-8, alkenyl with the carbon number of 2-8, alkoxy with the carbon number of 1-8 or alkene oxygroup with the carbon number of 2-8.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of March 26, 2013, an application number of 201380046517.8, and an invention title of "Liquid Crystal Composition and Liquid Crystal Display Element Using It". technical field [0002] The present invention relates to a liquid crystal composition and a liquid crystal display element which are useful as components of liquid crystal display devices and the like. Background technique [0003] Liquid crystal display devices are being used in various measurement equipment including clocks and calculators, automotive panels, word processors, electronic notebooks, 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. The liquid crystal compositions use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/44G02F1/137
CPCC09K19/44C09K2019/0448C09K2019/122C09K2019/3004C09K2019/3009C09K2019/301C09K2019/3016G02F1/137G02F1/13712
Inventor 栗泽和树小川真治岩下芳典
Owner DIC CORP
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