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Liquid crystal oriented film, and preparation and use thereof

A technology of liquid crystal alignment and photosensitive group, applied in the field of alignment film, which can solve problems such as contamination of devices, influence of total yield, difficulty in improving viewing angle, etc.

Inactive Publication Date: 2004-01-07
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the rubbing method has its fatal shortcoming: one is that the dust and static electricity generated in the rubbing process will pollute the device, especially for the advanced circuit chip of the liquid crystal display (TFT-LCD) driven by a thin film transistor, which will have a very harmful effect; Second, it is difficult to improve the viewing angle
Due to the dirt and stagnant water generated by friction and the poor adhesion of the PI material itself, the PI layer is easy to partially fall off after friction orientation and ultrasonic cleaning, and the rework rate of the serious process can reach 30%, and the light one can also be 5-10%. , which seriously affects the overall yield

Method used

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  • Liquid crystal oriented film, and preparation and use thereof
  • Liquid crystal oriented film, and preparation and use thereof

Examples

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Effect test

Embodiment 1( Synthetic example 1

[0054] The polyphenylhydrogensilsesquioxane was synthesized according to the preparation methods of the published Chinese patent CN 94100507 and Japanese patent JP08,188649 [96,188649] (PCT 97007). The molar ratio of hydrogen group and phenyl group is 1:1.

[0055] In a 20mL reaction bottle, 0.08mmol of p-decyloxycinnamoyl p-undecenyl ester was charged, and then 0.2mL of catalyst Cp 2 PtCl 2 dichloromethane solution (concentration of 1 mg / mL), 5 mL of anhydrous toluene and 2 mL of polyphenylhydrosilsesquioxane (concentration of 18 mg / mL, Si-H content of 0.05 mmol / mL). The solution was stirred at 90° C. for 30-60 hours under argon protection to obtain a transparent addition product LPMS-Cin solution.

Embodiment 2( Synthetic example 2

[0057] According to the preparation method of published Chinese patent CN 94100507 and Japanese patent JP08,188649 [96,188649] (PCT 97007), polyhydrogen methyl copolysilsesquioxane was synthesized, instead of polyhydrogen phenyl in Example 1 Silsesquioxane. The molar ratio of hydrogen group and methyl group is 1:1. Others are with embodiment 1.

Embodiment 3( Synthetic example 3

[0059] Use p-decyloxycinnamoyl p-end propylene ester instead of p-decyloxycinnamoyl p-end undecenyl ester, and the others are the same as in Example 1.

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Abstract

The present invention relates to a liquid crystal photooriented film using polysilsesquioxans as base material, its composition material includes polysilsesquioxane whose side chain contains photosensitive group and its composition material, and the connection mode of the side chain and base body has two kinds of vertical connection type and side connection type. Said oriented layer can be made up by using polysilsesquioxane whose side chain contains photosensitive group and its composition material in the general solvent, for example toluene, xylene, ethyl alcohol or tetrahydrofuran solutionby means of spin-coating process. The coated base plate after whic his irradiated by polarized long-wave UV light ejected by optical system formed from ball mercury vapour lamp, quartz condensing prism and polarizer can produce vertical and planar two kinds of orientation effect with preinclined angle for induction, and said preinclined angle can be up to 6 deg.

Description

technical field [0001] The invention relates to an alignment film for liquid crystal display, in particular to a photoinduced liquid crystal alignment film with polysilsesquioxane containing photosensitive groups in its side chain and its composition as the base material. [0002] The present invention also relates to a method for producing the above-mentioned alignment film. [0003] The present invention also relates to the use of the above-mentioned oriented film. Background technique [0004] In the Nematic TN and STN liquid crystal displays that have been widely used now, in order to arrange the liquid crystal molecules in a certain direction, polyimide (PI), polyamide (PA), polyamide Organic polymers such as amine (PAI) and polyvinyl alcohol form a polymer film on the substrate, and then rubbing (rubbing) on ​​its surface in a certain direction with nylon cloth, velvet, etc. [0005] In the era of monochrome displays, the commercialized alignment film represented by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K19/38G02F1/1337
Inventor 谢萍张榕本顾海文唐永新崔利张志勇
Owner INST OF CHEM CHINESE ACAD OF SCI
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