US 12,072,581 B2 · Liquid crystal display device and manufacturing method thereof

Abstract

Disclosed is a manufacturing method of a liquid crystal display device which is a manufacturing method of a liquid crystal display device including a liquid crystal alignment film to which an alignment regulating force is imparted by a photo-alignment treatment, including: a film forming step of forming a film containing a polymer whose main chain is cleaved by irradiation with light; a photo-alignment step of imparting an alignment regulating force to the film formed in the film forming step by irradiation of the film with light in an atmosphere of a temperature lower than 100° C.; and a removing step of removing a low-molecular weight component generated by cleaving the main chain of the polymer through the light irradiation after the light irradiation. Also disclosed is a liquid crystal display device manufactured by the manufacturing method.

Claims8

Dependent claims

A manufacturing method of a liquid crystal display device comprising:

a photo alignment film forming step comprising:
forming a film formed of polyimide having a cyclobutane structure;
imparting an alignment regulating force to the film by irradiation of the film with light in an atmosphere having a temperature lower than 25° C.;
and
heating the film after the irradiation to 150° C. or higher to removing a low-molecular weight component generated by the irradiation with the light,
wherein the photo alignment film aligns liquid crystal molecules substantially in parallel with a surface of a substrate, and
wherein the polyimide is represented by chemical formula (1),
in the formula, R represents a divalent electron donating organic group and n represents the number of repeating units of the polymer.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/143,147Filed 4 May 2023 · continuation

Priority

JP 2009-26007613 Nov 2009

Published

US 2023/0273483 A131 Aug 2023

Granted

27 Aug 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

G02F 1/133788
By treatment of the surface, e.g. embossing, rubbing or light irradiation: by light irradiation, e.g. linearly polarised light photo-polymerisation
G03F 7/30
Processing photosensitive materials; Apparatus therefor: imagewise removal using liquid means
G03F 7/36
Processing photosensitive materials; Apparatus therefor: imagewise removal not covered by groups G03F7/30 - G03F7/34, e.g. using gas streams,…
C08G 73/1078
Partially aromatic polyimides: wholly aromatic in the diamino moiety

Family

Application12/943,190Parent of this continuation · filed 10 Nov 2010

Application14/246,787Parent of this continuation · filed 7 Apr 2014

US 8,692,970 B2Parent of this continuation · filed 8 Apr 2014

Application16/276,796Parent of this continuation · filed 15 Feb 2019

US 10,268,081 B2Parent of this continuation · filed 23 Apr 2019

Application16/828,026Parent of this continuation · filed 24 Mar 2020

US 10,634,954 B2Parent of this continuation · filed 28 Apr 2020

Application17/841,712Parent of this continuation · filed 16 Jun 2022

US 11,391,993 B2Parent of this continuation · filed 19 Jul 2022

US 2023/0273483 A1Pre-grant publication · published 31 Aug 2023

US 11,681,184 B2Parent of this continuation

US 2011/0115999 A1Published application

US 2014/0220848 A1Published application

US 2019/0179203 A1Published application

US 2020/0225543 A1Published application

US 2022/0326577 A1Published application

US 12,072,581 B2This patent

From the US filing history. Foreign family members aren’t listed.

Liquid crystal display device and manufacturing method thereof

Life of this patent

Liquid crystal display device and manufacturing method thereof

Life of this patent

Abstract

Claims8