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:
Apr. 21, 2009
Filed:
Nov. 22, 2006
Hirofumi Kubota, Kanazawa, JP;
Norihisa Maeda, Ishikawa-gun, JP;
Masuyuki Oota, Hakusan, JP;
Kenji Mitsui, Hakusan, JP;
Hirofumi Kubota, Kanazawa, JP;
Norihisa Maeda, Ishikawa-gun, JP;
Masuyuki Oota, Hakusan, JP;
Kenji Mitsui, Hakusan, JP;
Toshiba Matsushita Display Technology Co., Ltd., Tokyo, JP;
Abstract
An organic EL display includes a substrate, and organic EL elements arranged on the substrate. Each organic EL element includes an anode, a cathode, an emitting layer made of an organic material and interposed therebetween, and a hole transporting layer made of an organic material and interposed between the emitting layer and the anode. The hole transporting layer includes a first layer and a second layer facing the substrate with the first layer interposed therebetween. The second layer is equal in compositions with the first layer and different in degrees of crystallinity from the first layer.