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. 04, 2006
Filed:
Jul. 15, 2003
Akio Ogawa, Tokyo, JP;
Koichi Takayama, Tokyo, JP;
Atsushi Nagasaki, Tokyo, JP;
Yasuro Kingo, Tokyo, JP;
Akio Ogawa, Tokyo, JP;
Koichi Takayama, Tokyo, JP;
Atsushi Nagasaki, Tokyo, JP;
Yasuro Kingo, Tokyo, JP;
Stanley Electric Co., Ltd., Tokyo, JP;
Abstract
In conventional organic EL display elements of this type, unevenness of brightness surely occurs at high temperatures. These conventional organic elements cannot be used in, for example, display devices to be mounted on vehicles, giving rise to the problem of inferior generalities. An organic EL display elementaccording to the present invention comprises a stress relaxation layer on a cathode after the cathode is formed, the stress relaxation layer being a film which exhibits tensile stress when the film stress of the cathode is compressive stress or exhibits compressive stress when the film stress of the cathode is tensile stress. This structure allows the organic EL display element to prevent the occurrence of unevenness of brightness caused by the film stress of the cathode to solve the problem and makes it possible to give generalities to organic EL display elements of this type.