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Nematic liquid crystal composition and liquid crystal display element using same

一种组合物、化合物的技术，应用在液晶材料、化学仪器和方法等方向，能够解决液晶显示元件折射率驱动电场平衡破坏、斑点产生、对比度不良等问题，达到抑制显示不良、实用性高、高成品率的效果

Active Publication Date: 2014-08-13
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the deviation between the injection amount and the optimum value becomes large, the pre-designed refractive index of the liquid crystal display element and the balance of the driving electric field will be disrupted, and display defects such as mottling and poor contrast will occur.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0743] Compositions shown below were prepared. Table 1 shows the physical properties of the composition of Example 1.

[0744]

[0745] [Table 1]

[0746]

Embodiment 2）

[0758] Compositions shown below were prepared. Table 4 shows the physical properties of the composition of Example 2.

[0759]

[0760] [Table 4]

[0761]

Embodiment 1

[0762] The composition of Example 1 has a high Tni, an appropriate value of Δn, a large Δε, and a low viscosity suitable for high-speed response.

[0763] In Comparative Example 1, T-1 and T-2 (tolanyl compounds) were used instead of the compound represented by the general formula (i). Although it was a composition in which Tni and Δn were combined to the same extent as in Example 1, the viscosity η increased.

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PUM

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Abstract

A composition contains one or more compounds represented by general formula (i) and one or more compounds represented by general formula (ii), where a content of the compounds represented by general formula (i) is 5% to 30% and a content of the compounds represented by general formula (ii) is 5% to 25%: (In the formulae, R i1 , R i2 , and R ii1 each independently represent an alkyl group having 1 to 8 carbon atoms where one -CH 2 - or two or more non-adjacent -CH 2 - in the alkyl group may each independently be substituted with -CH=CH-, - C‰¡C-, -O-, -CO-, -COO-, or -OCO-, X i1 to X i6 each independently represent a hydrogen atom or a fluorine atom, and X ii1 represents a hydrogen atom, a fluorine atom, or a chlorine atom.)

Description

technical field [0001] The present invention relates to a nematic liquid crystal composition having a positive dielectric constant anisotropy (Δε), which is useful as a liquid crystal display material, and a liquid crystal display element using the composition. Background technique [0002] Liquid crystal display elements have developed from clocks and electronic calculators to various measuring instruments, automotive panels, word processors, electronic notepads, printers, computers, televisions, clocks, advertising display boards, etc. Representative liquid crystal display methods include TN (twisted nematic) type, STN (super twisted nematic) type, vertical alignment type using TFT (thin film transistor), and IPS (in-plane switching) type. The liquid crystal composition used in these liquid crystal display elements is required to be stable against external stimuli such as moisture, air, heat, and light, and to display a liquid crystal phase in as wide a temperature range a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/12C09K19/30C09K19/42
CPCC09K19/3066C09K2019/3063C09K2019/3016C09K2019/301C09K2019/0466C09K19/44C09K2019/3009C09K2019/181C09K2019/123C09K2019/3004C09K2019/3025
Inventor 河村丞冶根岸真丹羽雅裕
Owner DIC CORP