Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for producing substrate having liquid crystal alignment film for in-plane switching liquid crystal display elements

A technology of liquid crystal alignment film and transverse electric field, applied in optics, instruments, nonlinear optics, etc., can solve the problems of dust generation, static electricity, and inability to uniformly rub the liquid crystal alignment film.

Active Publication Date: 2016-04-13
NISSAN CHEM IND LTD +1
View PDF11 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the brushing method of rubbing the surface of a liquid crystal alignment film made of polyimide or the like has problems of generating dust and static electricity.
In addition, due to the high-definition of liquid crystal display elements in recent years, the unevenness caused by the electrodes on the corresponding substrate or the switching active elements for liquid crystal driving, it is impossible to rub the surface of the liquid crystal alignment film uniformly with a cloth, and it is impossible to achieve a uniform liquid crystal. orientation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing substrate having liquid crystal alignment film for in-plane switching liquid crystal display elements
  • Method for producing substrate having liquid crystal alignment film for in-plane switching liquid crystal display elements
  • Method for producing substrate having liquid crystal alignment film for in-plane switching liquid crystal display elements

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0281] [Preparation of polymer composition]

[0282] The polymer composition used in the present invention is preferably prepared in the form of a coating liquid so as to be suitable for forming a liquid crystal aligning film. That is, the polymer composition used in the present invention is preferably prepared in the form of a solution in which a resin component for forming a resin coating is dissolved in an organic solvent. Here, the resin component refers to a resin component containing the above-mentioned photosensitive side chain type polymer capable of expressing liquid crystallinity. In this case, the content of the resin component is preferably 1% by mass to 20% by mass, more preferably 3% by mass to 15% by mass, particularly preferably 3% by mass to 10% by mass.

[0283] In the polymer composition of this embodiment, the above-mentioned resin components may all be the above-mentioned photosensitive side-chain polymers capable of exhibiting liquid crystallinity,...

Embodiment

[0353] Abbreviations used in Examples are as follows.

[0354]

[0355]

[0356] MA1 was synthesized by the synthesis method described in the patent document (WO2011-084546).

[0357] MA2 was synthesized by the synthesis method described in the patent document (Japanese Patent Laid-Open No. 9-118717).

[0358]

[0359] THF: Tetrahydrofuran

[0360] NMP: N-methyl-2-pyrrolidone

[0361] BC: Butyl cellosolve

[0362]

[0363] AIBN: 2,2'-Azobisisobutyronitrile

Synthetic example 1

[0365] MA1 (9.97 g, 30.0 mmol) was dissolved in THF (92.0 g), and after degassing with a diaphragm pump, 0.246 g (1.5 mmol) of AIBN was added and degassed again. Then, it was made to react at 50 degreeC for 30 hours, and the polymer solution of the methacrylate was obtained. This polymer solution was added dropwise to diethyl ether (1000 ml), and the resulting precipitate was filtered. This deposit was wash|cleaned with diethyl ether, and it dried under reduced pressure in the oven of 40 degreeC, and obtained the methacrylate polymer powder.

[0366] NMP54.0g was added to the obtained powder 6.0g, and it stirred at room temperature for 3 hours. Furthermore, BCS40.0g was added to this solution, and it stirred at room temperature for 1 hour, and obtained the polymer solution (A1) whose solid content concentration was 6.0 wt%. This polymer solution becomes the liquid crystal aligning agent for forming a liquid crystal aligning film as it is.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Wavelengthaaaaaaaaaa
Wavelengthaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides a highly reliable in-plane switching liquid crystal display element which is provided with alignment control ability at high efficiency and has excellent screen burn-in characteristics. The present invention achieves the above-described objective by a method for producing a substrate having a liquid crystal alignment film, in which a liquid crystal alignment film for in-plane switching liquid crystal display elements provided with alignment control ability is obtained by performing: [I] a step for forming a coating film by applying a polymer composition to a substrate having a conductive film for in-plane switching, said polymer composition containing (A) a photosensitive side-chain polymer which exhibits liquid crystallinity within a predetermined temperature range and (B) an organic solvent; [II] a step for irradiating the coating film obtained in step [I] with polarized ultraviolet light having an extinction ratio of 10:1 or more; and [III] a step for heating the coating film obtained in step [II].

Description

technical field [0001] The present invention relates to a method for manufacturing a substrate having a liquid crystal alignment film for a transverse electric field drive type liquid crystal display element. More specifically, it relates to a new method for producing a liquid crystal display element excellent in image sticking characteristics. Background technique [0002] Liquid crystal display devices are known as display devices that are light in weight, thin in cross-section, and low in power consumption. In recent years, they have been used in large-scale television applications, etc., and have achieved remarkable development. The liquid crystal display element is constituted, for example, by sandwiching a liquid crystal layer between a pair of transparent substrates provided with electrodes. Also, in a liquid crystal display element, an organic film containing an organic material is used as a liquid crystal alignment film to bring liquid crystals into a desired align...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G02F1/1337C08F220/30
CPCC08F220/303
Inventor 根木隆之芦泽亮一万代淳彦名木达哉川月喜弘近藤瑞穂
Owner NISSAN CHEM IND LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com