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

Liquid crystal display element with curved liquid crystal panel and liquid crystal aligning agent used therefor

A technology of liquid crystal aligning agent and liquid crystal panel, which is applied in the directions of instruments, optics, nonlinear optics, etc., and can solve the problem of not being able to limit the orientation of liquid crystals.

Active Publication Date: 2022-04-05
NISSAN CHEM IND LTD
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a problem that the liquid crystal aligning film to which pressure is applied by the spacers cannot regulate the orientation of liquid crystals, and even if the liquid crystal panel is displayed in black, for example, light leaks from the periphery of the spacers and is displayed as bright spots

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
  • Liquid crystal display element with curved liquid crystal panel and liquid crystal aligning agent used therefor
  • Liquid crystal display element with curved liquid crystal panel and liquid crystal aligning agent used therefor
  • Liquid crystal display element with curved liquid crystal panel and liquid crystal aligning agent used therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0165] Although an Example is given below and this invention is demonstrated more concretely, it is not limited to these. It should be noted that, in the following, the abbreviations used are as follows.

[0166] (tetracarboxylic dianhydride)

[0167] CBDA: 1,2,3,4-cyclobutanetetracarboxylic dianhydride

[0168] BODA: Bicyclo[3,3,0]octane-2,4,6,8-tetracarboxylic dianhydride

[0169]

[0170] 3-AMPDA: 3,5-diamino-N-(pyridin-3-ylmethyl)benzamide

[0171] p-PDA: p-phenylenediamine

[0172] PBCH5DAB: 1,3-Diamino-4-{4-[trans-4-(trans-4-n-pentylcyclohexyl)cyclohexyl]phenoxy}benzene

[0173] PCH7DAB: 1,3-Diamino-4-[4-(trans-4-n-heptylcyclohexyl)phenoxy]benzene

[0174]

[0175] TEOS: Tetraethoxysilane

[0176] UPS: 3-ureidopropyltriethoxysilane

[0177] MPMS: 3-Methacryloxypropyltrimethoxysilane

[0178] HTMS: Hexadecyltrimethoxysilane

[0179] (Organic solvents)

[0180] NMP: N-methyl-2-pyrrolidone, NEP: N-ethyl-2-pyrrolidone

[0181] BCS: Butyl cellosolve, PB: Prop...

Synthetic example 1

[0196] BODA (23.64g, 94.5mmol), p-PDA (5.11g, 47.3mmol), 3-AMPDA (16.0g, 66.15mmol) and DA-1 (32.86g, 75.6mmol) were mixed in NMP (216.0g) , After reacting at 80° C. for 5 hours, CBDA (18.53 g, 94.5 mmol) and NMP (94.6) g were added, and reacted at 40° C. for 6 hours to obtain a polyamic acid solution.

[0197] NMP (62.3g) was added to this polyamic acid solution (30.0g), and after diluting to 6% by mass, acetic anhydride (6.02g) and pyridine (1.87g) were added as an imidation catalyst, and the React for 3 hours. This reaction solution was poured into methanol (601.0 g), and the obtained deposit was collected by filtration. This deposit was wash|cleaned with methanol, it dried under reduced pressure at 100 degreeC, and the polyimide powder (A) was obtained. The imidization rate of this polyimide was 75%, Mn (number average molecular weight) was 13,200, and Mw (weight average molecular weight) was 40,600.

Synthetic example 2

[0199] BODA (23.64g, 94.5mmol), p-PDA (5.11g, 47.3mmol), 3-AMPDA (16.0g, 66.15mmol), DA-1 (16.43g, 37.8mmol) and DA-8 (14.39g, 37.8mmol) was mixed in NMP (207.8g), and after reacting at 80°C for 5 hours, CBDA (18.53g, 94.5mmol) and NMP (94.6)g were added, and reacted at 40°C for 6 hours to obtain a polyamic acid solution .

[0200]NMP (62.3 g) was added to this polyamic acid solution (30.0 g), and after diluting to 6% by mass, acetic anhydride (6.15 g) and pyridine (1.90 g) were added as an imidation catalyst, and the mixture was heated at 80° C. React for 3 hours. This reaction solution was poured into methanol (602.1 g), and the obtained deposit was collected by filtration. This deposit was wash|cleaned with methanol, it dried under reduced pressure at 100 degreeC, and the polyimide powder (B) was obtained. The imidization rate of this polyimide was 75%, Mn was 12,900, and Mw was 40,400.

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

To provide a liquid crystal display device including a curved liquid crystal panel having no bright spots even when physical friction such as spacer friction occurs. A curved liquid crystal display element including a liquid crystal aligning film containing a polymer having a structure of the following formula [1]. (Y 1 is a single bond, ‑(CH 2 ) a ‑(a is an integer from 1 to 15), ‑O‑, ‑CH 2 O‑,‑COO‑ or OCO‑, Y 2 is a single bond or (CH 2 ) b ‑(b is an integer from 1 to 15), Y 3 is a single bond, ‑(CH 2 ) c ‑(c is an integer from 1 to 15), ‑O‑, ‑CH 2 O‑, ‑COO‑, or OCO‑. Y 4 It is a cyclic group selected from the group consisting of benzene ring, cyclohexane ring and heterocyclic ring (any hydrogen atom on these cyclic groups is optionally replaced by an alkyl group with 1 to 3 carbons, an alkyl group with 1 to 3 carbons alkoxy group, fluorine-containing alkyl group with 1 to 3 carbons, fluorine-containing alkoxy group with 1 to 3 carbons, or fluorine atom substitution.), or selected from organic groups with 12 to 25 carbons having a steroid skeleton The divalent organic group in Y 5 It is a divalent cyclic group selected from the group consisting of benzene ring, cyclohexane ring and heterocycle (any hydrogen atom on these cyclic groups is optionally replaced by an alkyl group with 1 to 3 carbons, 1 ~3 alkoxy, 1-3 carbon fluorine-containing alkyl, 1-3 carbon fluorine-containing alkoxy or fluorine atom substitution.), n in Y 4 When it is a cyclic group selected from the group consisting of benzene ring, cyclohexane ring and heterocycle, it is an integer of 2 to 4, and in Y 4 When it is a divalent organic group selected from organic groups having 12 to 25 carbon atoms having a steroid skeleton, it is an integer of 0 to 4. In addition, when n is greater than 1, multiple Y 5 Each independently has the above-mentioned definition. Y 6 It is an alkyl group having 1 to 18 carbons, a fluorine-containing alkyl group having 1 to 18 carbons, an alkoxy group having 1 to 18 carbons, or a fluorine-containing alkoxy group having 1 to 18 carbons. )

Description

technical field [0001] This invention relates to the liquid crystal display element provided with the liquid crystal panel which has a curved surface shape, and the liquid crystal aligning agent used for it. Background technique [0002] In recent years, liquid crystal display devices have been used in various electronic devices such as smartphones, mobile phones, televisions, navigation devices, electronic notebooks, and electronic books along with reductions in thickness and low power consumption. The liquid crystal display device includes a liquid crystal panel and a drive circuit, and is configured by attaching incidental devices such as a backlight, a light guide plate, and a case as necessary. When a typical liquid crystal display device is used in an electronic device, the display surface of the liquid crystal display device is arranged in a planar shape substantially parallel to the casing of the electronic device. [0003] On the other hand, in recent years, with t...

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 Patents(China)
IPC IPC(8): G02F1/1337C08G73/10G02F1/1333
CPCC08G73/10G02F1/1333G02F1/1337
Inventor 大田政太郎芦泽亮一杉山晓子三木德俊
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