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Liquid crystal composition and liquid crystal display element using same

A liquid crystal composition and compound technology, applied in liquid crystal materials, chemical instruments and methods, instruments, etc., can solve problems such as insufficient effects, and achieve the effects of less sintering, reduced drop marks, and excellent high-speed response

Active Publication Date: 2018-07-06
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 burning caused by the polymerizable compound added to the liquid crystal, and the effect of suppressing drip marks is not sufficient. Therefore, it is required to develop a liquid crystal display element that maintains the basic characteristics of a liquid crystal display element and at the same time does not easily cause burning. , liquid crystal display elements with 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

[0253] A liquid crystal composition having the composition shown below was prepared, and its physical property values ​​were measured. The results are shown in the following tables.

[0254] Using the liquid crystal composition of Example 1, a VA liquid crystal display element was produced. 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 carried out by the dropping method, and the sintering, drop marks, process suitability and solubility at low temperature were evaluated.

[0255] In addition, the symbol on the left side of content is a description of the abbreviation of the said compound.

[0256] Example 1

[0257]

[0258] [Table 1]

[0259] T NI / ℃

[0260] It can be seen that the liquid crystal composition of Example 1 has a liquid crystal phase temperature range of 75.6° C. which is practical as a liquid crystal composition for TV, has a large...

Embodiment 2

[0276] A liquid crystal composition having the composition shown in Example 1 having the same liquid crystal phase temperature range, the same refractive index anisotropy value, and the same physical property value was measured. The value of dielectric constant anisotropy is obtained by way of design. The results are shown in the following tables.

[0277] Using the liquid crystal composition of Example 2, a VA liquid crystal display element was fabricated in the same manner as in Example 1, and evaluations were performed on sintering, drop marks, process suitability, and solubility at low temperatures, and the results are shown in the same table.

[0278] [Table 4]

[0279] Example 2

[0280] 3Cy

[0281] 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 optimal Δn. The liq...

Embodiment 3

[0289] A liquid crystal composition having the composition shown below was prepared, and its physical property values ​​were measured. The liquid crystal composition had the same liquid crystal phase temperature range and the same refractive index anisotropy as the compositions of Examples 1 and 2. Equivalent dielectric constant anisotropy values ​​are obtained by way of design. The results are shown in the following tables.

[0290] Using the liquid crystal composition of Example 3, a VA liquid crystal display element was produced in the same manner as in Example 1, and evaluations of sintering, drop marks, process suitability, and solubility at low temperatures were performed, and the results are shown in the same table.

[0291] [Table 6]

[0292] Example 3

[0293] 3Cy

[0294] It can be seen that the liquid crystal composition of Example 3 has a liquid crystal phase temperature range practical as a liquid crystal composition for TV, has a large absolute value ...

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Abstract

The present invention addresses the problem of providing: a liquid crystal composition that does not cause deterioration of dielectric anisotropy, viscoscity, nematic phase upper limit temperature, nematic phase stability at low temperatures, characteristics such as the γ1 of a liquid crystal display element, or display element burn-in characteristics, that is unlikely to cause drip marks during production, and that is suitable for a liquid crystal element that achieves a stable liquid crystal material discharge rate in an ODF process; and a liquid crystal display element using the liquid crystal composition. Provided are: a liquid crystal composition comprising 20-50 mass% of a compound that is represented by formula (I), 5-50 mass% of a compound that is represented by general formula (II), and at least one compound that is represented by general formula (III); and a liquid crystal display element using the liquid crystal composition.

Description

technical field [0001] The present invention relates to a liquid crystal composition and a liquid crystal display element which are useful as components of a liquid crystal display device or the like. Background technique [0002] Liquid crystal display elements are used in various measuring equipment represented by clocks and desktop computers, automotive panels, word processors, electronic notepads, printers, computers, televisions, clocks, advertising display boards, etc. Representative examples of 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. Liquid crystal compositions used in these liquid crystal display elements are required to be stable against external factors such as moisture, air, heat, and light, and to display a liquid crystal phase in as wide a temperature range as possible around room temperature, and to have l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/42C09K19/10C09K19/12C09K19/30C09K19/34C09K19/54G02F1/13
CPCC09K19/44C09K2019/0448C09K2019/122C09K2019/123C09K2019/3004C09K2019/3009C09K2019/301C09K2019/3016
Inventor 岩下芳典根岸真
Owner DIC CORP
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