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:
Nov. 27, 2007
Filed:
Dec. 16, 2004
Masahiro Shiratori, Yamagata, JP;
Soh Fujimura, Yamagata, JP;
Yasuhiro Saso, Yamagata, JP;
Yoshinori Fukuda, Yamagata, JP;
Masahiro Shiratori, Yamagata, JP;
Soh Fujimura, Yamagata, JP;
Yasuhiro Saso, Yamagata, JP;
Yoshinori Fukuda, Yamagata, JP;
Tohoku Pioneer Corporation, Yamagata, JP;
Abstract
An organic EL element includes a plurality of light-emitting units which exhibit organic EL luminescence and at least two different luminous colors and are connected in series; and a light-emitting surface formed by overlapping partly or wholly light-emitting surfaces of the light-emitting units. The plurality of light-emitting units includes light-emitting units which exhibit one color and are formed in multiple stages. A desired mixed color is obtained from the light-emitting surface by combining the different luminous colors.