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. 26, 2016
Filed:
Dec. 06, 2010
Makoto Yamada, Osaka, JP;
Yoshimasa Fujita, Osaka, JP;
Hidenori Ogata, Osaka, JP;
Yuhki Kobayashi, Osaka, JP;
Ken Okamoto, Osaka, JP;
Makoto Yamada, Osaka, JP;
Yoshimasa Fujita, Osaka, JP;
Hidenori Ogata, Osaka, JP;
Yuhki Kobayashi, Osaka, JP;
Ken Okamoto, Osaka, JP;
Unified Innovative Technology, LLC, Wilmington, DE (US);
Abstract
An organic EL element () according to the present invention is such that a positive and negative charge transport layer () is interposed between a cathode () and an anode (). The positive and negative charge transport layer () is composed of a single host material and has a light-emitting region () which is doped with a light-emitting dopant. The positive and negative charge transport layer () further has at least one of the following blocking regions: an electron blocking region (), provided closer to the anode () than the light-emitting region (), having a lowest unoccupied molecular orbital lower than that of the lowest unoccupied molecular orbital of the light-emitting region (); and a hole blocking region (), provided closer to the cathode () than the light-emitting region (), having a highest occupied molecular orbital higher than that of the highest occupied molecular orbital of the light-emitting region ().