The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 11, 2017
Filed:
Nov. 12, 2013
Ang Xiao, Beijing, CN;
Shanshan Wang, Beijing, CN;
Ang Xiao, Beijing, CN;
Shanshan Wang, Beijing, CN;
BOE TECHNOLOGY GROUP CO., LTD., Beijing, CN;
BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., Beijing, CN;
Abstract
An alignment film, a method for preparing the same, a liquid crystal display device including the alignment film. The alignment film is an oriented polyimide film. The method for preparing the alignment film includes: adding a bridging diphenyl diamine to N-methylpyrrolidinone, followed by the addition of 1,4,5,8-naphthalenetetracarboxylic dianhydride to allow the reaction to occur, and filtering the reaction mixture to give a liquid polyamide acid; dissolving the liquid polyamide acid into N-methylpyrrolidinone to give a solution, which is coated onto the surface of a substrate and subjected to a heat treatment, to produce a polyimide film; and orienting the polyimide film via an orientation process to form an alignment film, wherein, polyimide has a structure represented by Formula-4: