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Upright tropism type crystal tropism agent and upright tropism type crystal display element

A liquid crystal aligning agent and vertical alignment technology, applied in liquid crystal materials, optics, instruments, etc., can solve problems such as difficulty in prediction, deterioration of electrical characteristics, and reduction of printability

Active Publication Date: 2013-04-24
JSR CORPORATIOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to reduce this problem, it is expected that increasing the amount of vertical alignment components will be effective in improving vertical alignment, but it is still expected to be difficult because it will cause a decrease in other characteristics such as printability and electrical characteristics.

Method used

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  • Upright tropism type crystal tropism agent and upright tropism type crystal display element
  • Upright tropism type crystal tropism agent and upright tropism type crystal display element
  • Upright tropism type crystal tropism agent and upright tropism type crystal display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0113] Hereinafter, the present invention will be described more specifically by way of examples, but the present invention is not limited to these examples.

[0114] In addition, various measurements of Examples and Comparative Examples were performed as follows.

[0115] (1) Determination of voltage retention rate

[0116] A voltage of 5 V was applied to the liquid crystal display element at 60° C. for an application time of 60 microseconds and a time interval of 16.7 microseconds, and then the voltage retention rate 16.7 milliseconds after the application was released was measured.

[0117] (2) Afterimage evaluation by brightness

[0118] Two sets of liquid crystal display elements were prepared, one of which was subjected to a DC voltage of 1 V for 2 hours at room temperature (element A), and the other was applied with a DC voltage of 5 V for 2 hours at room temperature (element B). Then, when the luminance of the element A and element B observed when a 2.5V DC voltage w...

Synthetic example 1～21

[0132] In N-methyl-2-pyrrolidone, diamine and tetracarboxylic dianhydride (in the table, expressed as "acid anhydride") were sequentially added with the composition shown in Table 1 to make a solution with a solid content concentration of 20% by weight. The reaction was carried out at 60° C. for 4 hours to obtain a polyamic acid polymer. To the obtained polyamic acid polymer, pyridine and acetic anhydride were added in multiple molar numbers as shown in Table 1 with respect to the total amount of the polyamic acid polymer, and then heated to 110° C. for 4 hours for a dehydration ring-closure reaction. After the obtained solution was reprecipitated with diethyl ether, it was collected and dried under reduced pressure to obtain (A-1) to (A-21 ).

[0133]

[0134] In Table 1, the numbers in parentheses indicate the content ratio (molar ratio) of the diamine compound and the acid anhydride, and the meanings of the symbols in the table are as follows.

[0135]

[0136] D-1: ...

Embodiment 1

[0152] The imidized polymer (A-1) obtained in Synthesis Example 1 was dissolved in γ-butyrolactone / N-methyl-2-pyrrolidone / butyl cellosolve mixed solution (weight ratio 40 / 30 / 30), Dissolve benzene-1,4-diphenol diglycidyl ether (epoxy A) and n-propylamine (amine A) in proportions of 20 parts by weight and 2 parts by weight relative to 100 parts by weight of the polymer to make a solid concentration 6.5% by weight of the solution, the solution was visually observed as a transparent solution without turbidity. Next, the film-forming composition of the present invention was prepared by filtration using a filter with a pore size of 0.2 μm, and then the printability was evaluated. It was confirmed that the coating film had good printability, with no tearing and coating unevenness.

[0153] Next, the film-forming composition of the present invention was prepared in the same manner as above except that the solid content concentration was 4% by weight.

[0154] Next, the film-forming c...

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Abstract

The present invention provides a vertical orientation type liquid crystal orientation agent, including polymers containing at least one repetition unit of polyamide acids repetition unit and imide repetition unit, at least one loop oxo compound selected from compounds containing at least two loop oxo groups, moreover, the proportion of loop oxo compound is 1 to 50 shares relative to 100 shares ofthe polymers by weight. The present invention also provided a vertical orientation type liquid crystal orientation agent with high vertical orientation and printing performance as well as excellent electrical property.

Description

technical field [0001] The present invention relates to a vertical alignment type liquid crystal aligning agent and a liquid crystal display element having a vertical alignment type liquid crystal aligning film. In more detail, it is related with the vertical alignment type liquid crystal aligning agent which has excellent vertical alignment property, shows favorable electrical characteristic, and is excellent in the applicability by the printing method. Background technique [0002] As a liquid crystal display element, a TN type liquid crystal display element having a so-called TN type (twisted nematic) liquid crystal cell is known at present. A liquid crystal alignment film made of amine, etc., to obtain a substrate for liquid crystal display elements, and then place two of the above substrates facing each other, and form a nematic liquid crystal layer with positive dielectric anisotropy in the gap, thereby making a sandwich structure In the cell, the long axes of the liq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1337C09K19/38C09K19/52
CPCC09K19/56G02F1/1337
Inventor 熊谷勉西川通则
Owner JSR CORPORATIOON
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