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Composition and liquid crystal display element using same

A composition and component technology, applied in liquid crystal materials, optics, instruments, etc., can solve problems such as poor contrast of spots, collapse of the electric field driven by the refractive index of liquid crystal display elements, difficulties, etc.

Inactive Publication Date: 2017-08-18
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the difference between the injection amount and the optimum value becomes large, the balance between the refraction index and the driving electric field designed in advance of the liquid crystal display element will collapse, and display defects such as the occurrence of spots and poor contrast will occur.
In particular, it is difficult to control the deviation from the optimum value within a certain range since the optimum liquid crystal injection amount is small in the small liquid crystal display elements that are often used in the recently popular smartphones.

Method used

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  • Composition and liquid crystal display element using same
  • Composition and liquid crystal display element using same
  • Composition and liquid crystal display element using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0502] (Example 1, Comparative Examples 1-3)

[0503] The composition of Example 1 contained the compounds represented by the general formulas (i) and (ii), and Comparative Examples 1 to 3 did not contain the compound represented by the general formula (i).

Embodiment 2～4

[0510] [table 3]

[0511] Example 2 Example 3 Example 4 Tni 84.2 82.4 80.2 Δn 0.136 0.135 0.127 Δε 2.5 2.6 2.4 n 26.4 25.8 21.7 gamma 1 52 49 42 γ1 / Δn 2

Embodiment 5～7

[0513] [Table 4]

[0514] Example 5 Example 6 Example 7 Tni 79.4 83.4 81.8 Δn 0.102 0.108 0.109 Δε 3.0 5.2 5.2 n 47.9 75.6 72.5 (ii-1-2.2) 50 40 40 (ii-1-1.3) 10 10 10 (ii-1-2.4) 6 6 6 (L-4.1) 3 3 3 (L-4.2) 4 4 4 (L-6.1) 11 8 8 (L-6.6) 2 2 2 (i-1.2) 7 7 7 (M-4.3) 7 7 5 (M-2.3) 7 5 (M-4.2) 6 5 (M7.12) 5

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Abstract

The present invention addresses the problem of providing a liquid crystal display element which has excellent display quality and is not susceptible to the occurrence of display failure with high yield by means of providing a composition which has a positive [Delta]epsilon and a liquid phase over a wide temperature range, while exhibiting excellent viscosity, solubility at low temperatures, specific resistance, voltage holding ratio and stability. The present invention provides a composition which contains one or more compounds represented by general formula (i) and one or more compounds represented by general formula (ii), with the content of the compounds represented by general formula (ii) being 20-90% by mass. The present invention also provides a liquid crystal display element which uses this composition and an IPS element and an FFS element, each of which uses this composition.

Description

technical field [0001] The present invention relates to a composition having a positive dielectric constant anisotropy (Δε) useful as a liquid crystal display material, and a liquid crystal display element using the same. Background technique [0002] From clocks and calculators, liquid crystal display components have developed into various measurement equipment, 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, 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 exhibit a liquid crystal phase in as wide a temperature range as possible around room temperature, to have low visco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/30C09K19/44G02F1/13
CPCC09K19/30C09K19/44G02F1/13
Inventor 岩下芳典根岸真
Owner DIC CORP
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