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Liquid crystal display element

A technology of liquid crystal display element and liquid crystal layer, which is applied in the field of liquid crystal display devices and nematic liquid crystal compositions, can solve problems such as lack of understanding, unpredictable effects, and difficulty in forming liquid crystal display elements, and achieve excellent high-speed response and poor display The effect of producing less and excellent display characteristics

Active Publication Date: 2014-12-31
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is no understanding of issues such as screen burn-in and drop marks that are difficult to predict based on conventional technologies.
Therefore, even if simply switching to a liquid crystal composition for VA, it is difficult to form a high-performance liquid crystal display device currently required, and thus it is required to provide an n-type liquid crystal composition most suitable for the FFS mode.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0237] (Example 1 (Liquid Crystal Composition 1))

[0238] A liquid crystal composition (liquid crystal composition 1) having the composition shown below was prepared, and its physical property values ​​were measured. The results are shown in the table below.

[0239] Using the liquid crystal composition 1, an FFS mode liquid crystal display element with a cell thickness of 3.0 μm, which is generally used for TV, was fabricated. 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.

[0240] In addition, the symbol on the left side of content is description of the abbreviation of the said compound.

[0241] [chem 30]

[0242] Example 1

[0243]

[0244] [Table 1]

[0245]

[0246] It can be seen that liquid crystal composition 1 has a T of 85.3° C. which is practical as a liquid crystal composition for TV. NI , with a large...

Embodiment 2

[0247] (Example 2 (liquid crystal composition 2))

[0248] The modulation is designed to have the same T as that of liquid crystal composition 1 NI , an equivalent Δn value and an equivalent Δε value with a liquid crystal composition (liquid crystal composition 2) having the composition shown below, and its physical property values ​​were measured. The results are shown in the table below.

[0249] Using the liquid crystal composition 2, an FFS mode 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.

[0250] [Table 2]

[0251] Example 2

[0252]

[0253] It can be seen that liquid crystal composition 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 has the best Δn. Using the l...

Embodiment 3

[0254] (Example 3 (liquid crystal composition 3))

[0255] The modulation is designed to have the same T as the liquid crystal composition 1, 2 NI , an equivalent Δn value and an equivalent Δε value with a liquid crystal composition (liquid crystal composition 3) having the composition shown below, and its physical property values ​​were measured. The results are shown in the table below.

[0256] Using the liquid crystal composition 3, an FFS mode 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.

[0257] [table 3]

[0258] Example 3

[0259]

[0260] It can be seen that liquid crystal composition 3 has a practical T as a liquid crystal composition for TV. NI , with a large absolute value of Δε, with low η and the best Δn. Using the liquid crystal composition 3 to produce the same FFS mode liquid crystal...

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PUM

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Abstract

Provided is an FFS-type liquid crystal display element which uses a liquid crystal composition containing at least one type of compound selected from the group of compounds represented by general formula (I), at least one type of compound selected from the group of compounds represented by general formula (II), and at least one type of compound selected from the group of compounds represented by general formula (III), as a liquid crystal display element which uses a liquid crystal composition having negative dielectric anisotropy, whereby it is possible to realize excellent display characteristics through use thereof in an FFS-mode liquid crystal display element without adversely affecting liquid crystal display element characteristics such as dielectric anisotropy, viscosity, nematic phase upper-limit temperature, nematic phase stability at low temperature, and [gamma] 1, and image retention characteristics in the liquid crystal display element.

Description

technical field [0001] The invention of the present application relates to an FFS mode liquid crystal display device with the characteristics of high transmittance and high aperture ratio using a nematic liquid crystal composition with a negative dielectric constant anisotropy. Background technique [0002] Active-matrix liquid crystal display devices are used in markets such as mobile terminals, liquid crystal televisions, projectors, and computers because of their excellent display quality. In the active matrix system, TFT (Thin Film Transistor) or MIM (Metal-Insulator-Metal) is used for each pixel, and the liquid crystal compound or liquid crystal composition used in this system has a high voltage retention rate. In addition, in order to obtain a wider viewing angle characteristic, a combination of VA (Vertical Alignment: Vertical Alignment) mode, IPS (In Plane Switching) mode, OCB (Optically Compensated Bend), and optically compensated dual Refraction (Optically Compens...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1343G02F1/1362C09K19/44
CPCC09K19/42C09K19/44C09K2019/122C09K2019/123C09K2019/3004C09K2019/301C09K2019/3027G02F1/134309G02F1/134372G02F1/13712G02F1/133738C09K19/3003C09K2019/3009C09K2019/3016G02F1/1337G02F1/13439G02F1/136286G02F1/1368
Inventor 栗泽和树小川真治岩下芳典
Owner DIC CORP
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