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. 25, 2006
Filed:
Sep. 26, 2003
Hiroshi Kanno, Osaka, JP;
Yuji Hamada, Ikoma-gun, JP;
Kazuki Nishimura, Hirakata, JP;
Sanyo Electric Co., Ltd., Osaka, JP;
Abstract
A light-emitting device including a plurality of emission layers, which has improved luminous efficiency and improved emission lifetime, is provided. In the light-emitting device, a first optical film thickness range Lfrom a light-emitting position of a first emission layer to a light-emitting surface of the device, a second optical film thickness range Lfrom a light-emitting position of a second emission layer to the device light-emitting surface, and film thicknesses of a plurality of layers between the light-emitting surface and the first emission layer, the first emission layer and the second emission layer are set so as to increase the luminous intensity of color of an emission produced by mixing an emission from the first emission layer with an emission from the second emission layer.