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:
Feb. 11, 2014
Filed:
Feb. 16, 2011
Noboru Kunimatsu, Chiba, JP;
Chikae Matsui, Mobara, JP;
Hidehiro Sonoda, Mobara, JP;
Yuko Matsumoto, Onjuku, JP;
Shoichi Uchino, Annaka, JP;
Masaki Matsumori, Tokai, JP;
Yasushi Tomioka, Mobara, JP;
Noboru Kunimatsu, Chiba, JP;
Chikae Matsui, Mobara, JP;
Hidehiro Sonoda, Mobara, JP;
Yuko Matsumoto, Onjuku, JP;
Shoichi Uchino, Annaka, JP;
Masaki Matsumori, Tokai, JP;
Yasushi Tomioka, Mobara, JP;
Hitachi Displays, Ltd., Chiba, JP;
Panasonic Liquid Crystal Display Co., Ltd., Hyogo-ken, JP;
Abstract
This invention enables forming a photo-alignment film having a large LC anchoring strength in an IPS type liquid crystal display device. An alignment film is adapted to have a two-layer structure including a photo-alignment film and an alignment film with enhanced film strength. The photo-alignment film is formed of a precursor of polyamide acid ester, 80 percent or more of which is polyamide acid ester including cyclobutane. The alignment film with enhanced film strength is formed of a precursor of polyamide acid. After irradiating the substrate with ultraviolet light for photo-alignment, the substrate is heated. Thus, it is possible to achieve a high LC anchoring strength of the alignment film as the whole for photo-alignment, without degrading the mechanical strength of the alignment film with enhanced film strength.