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

Directional film and liquid crystal display device using the same directional film

A liquid crystal display, directional film technology, applied in the direction of instruments, optics, nonlinear optics, etc., can solve problems such as failure to degrade, and achieve the effects of excellent operating characteristics, improved retention characteristics, and prevention of charge retention rate reduction.

Inactive Publication Date: 2005-07-13
INNOLUX CORP
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Patent Document 1 aims at reducing the change in pretilt angle and the destruction of alignment characteristics caused by heat treatment during manufacture, and does not even hint at the purpose of preventing deterioration due to impurity ions and its countermeasures.
Therefore, from the content disclosed in Patent Document 1, this manufacturer was unable to take countermeasures against deterioration due to impurity ions.

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
  • Directional film and liquid crystal display device using the same directional film
  • Directional film and liquid crystal display device using the same directional film
  • Directional film and liquid crystal display device using the same directional film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0051] (1) Prepare a glass substrate for forming a predetermined circuit or the pixel electrode 16 of the liquid crystal display 10 .

[0052] (2) Mixing a low molecular weight thermosetting resin with polyimide and / or polyamic acid to prepare a resin composition. The mixing ratio is 99.9:0.1 to 5:95 by weight.

[0053] (3) Coat the resin composition uniformly on the said glass substrate. Coating can be performed by general coating methods such as spin coating, printing, brush coating, spraying, and the like.

[0054] (4) The solvent of the polyimide resin mixed with the low-molecular-weight thermosetting resin is evaporated in a relatively low-temperature atmosphere, and then baked in a relatively high-temperature atmosphere. In addition, the low-temperature atmosphere used for solvent evaporation is appropriately selected according to the solvent mixed in the resin composition, and the baking temperature is determined according to the polyimide and / or polyamic acid and low...

Embodiment 1

[0066] A resin composition in which double F-type epoxy resin (Yepicot 806 manufactured by Nippon Epoxy Resin Co., Ltd.) and polyimide resin wax (Nissan Chemical Co., Ltd. SE7492 6% solid content concentration) were directly dissolved was adjusted. An average of 2 samples of 0%, 1%, 10%, and 50% by weight of the epoxy resin ratio to the mixed solution of the epoxy resin and the polyimide resin wax was prepared individually. Then, after the adjusted resin composition is coated with a spinner on a glass substrate equipped with an indium tin oxide (ITO) transparent electrode, it is pre-baked in an atmosphere of about 85°C, and heat-cured at about 220°C for 30 minutes. A film of about 60 to 100 nm is formed. In addition, grinding|polishing was performed on the conditions of the pushing amount of 0.3 mm, the number of revolutions of 700 rpm, and the conveying speed of 1000 mm / min. Print epoxy-based thermosetting sealant, spread 5.25μm-diameter spacer balls and bond them with therm...

Embodiment 2

[0073] The liquid crystal 12 is a fluorine-based liquid crystal (model ZLI4792, +5.3 dielectric anisotropy) restrained by magnesium ear. A liquid crystal display was fabricated in the same manner as in Example 1. An average of two samples were prepared in which the ratio of the epoxy resin to the mixed solution of the epoxy resin and the polyimide resin wax was 0%, 1%, 10%, and 50% by weight. Experiments were conducted with respect to the response time (ON+OFF) of the liquid crystal display. The results are shown in Table 2 and image 3 . Using an alignment film composed of double F-type epoxy resin mixed with 1%, 10%, and 50% by weight of epoxy resin and polyimide resin wax mixed solution, the response time of liquid crystal 12 was approximately stable.

[0074] Table 2

[0075] epoxy resin

response time

mix ratio

Microsecond (msec)

0% by weight

15.1

0% by weight

14.2

1% by weight

15.5

1% by weight

...

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

No PUM Login to View More

Abstract

The present invention aims to provide an alignment film that prevents deterioration due to impurity ions in liquid crystal, and a liquid crystal display using the alignment film. The alignment film 10 of the present invention provides an alignment film composed of a resin composition comprising a polyimide resin or a polyamide resin and a low molecular weight thermosetting resin having a viscosity of 1 to 3000 poise at 25°C. The impurity ions 14 in the liquid crystal 12 are prevented from reaching the pixel electrodes 16 by using the alignment film 10 in which the monomer thermosetting resins are mixed. The liquid crystal display of the present invention provided with this alignment film has improved retention characteristics in a reliability test, and is excellent in operating characteristics even when a liquid crystal with high dielectric anisotropy is used.

Description

technical field [0001] The present invention relates to an alignment film for eliminating deterioration defects and a liquid crystal display using the alignment film. Background technique [0002] In recent years, development of large-scale liquid crystal displays or high-definition liquid crystal displays has been vigorously carried out. By selecting the liquid crystal material, a high-speed response liquid crystal display can also be obtained, and the afterimage phenomenon of the liquid crystal display can also be eliminated. [0003] In these liquid crystal displays, impurity ions present in liquid crystals are the cause of a decrease in the charge retention rate. Liquid crystal material is necessary to increase the resistivity to suppress the flow of electric current. Therefore, in order to obtain high resistivity, it is necessary to improve the refining method without having a high degree of precision such as a small amount of impurity ions. However, in liquid crysta...

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
Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337C08G59/40
CPCC09K2323/00C09K2323/02C09K2323/025C09K2323/027C09K2323/055G02F1/133711G02F1/133723G02F2201/501Y10S525/928G02F1/1337
Inventor 桃井优一
Owner INNOLUX CORP
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