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:
Mar. 27, 2018
Filed:
Mar. 25, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Takeshi Uchida, Hiratsuka, JP;
Takeshi Yoshioka, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides a light emitting device which emit light having a high-order level without increasing a current injection density to an active layer. A light emitting device according to the present invention includes an upper electrode layer, a lower electrode layer, and an active layer provided between them. In this case, light is emitted by injection of electric current to the active layer through the upper electrode layer and the lower electrode layer, the active layer has a plurality of quantum-confined structures, and a first quantum-confined structure has a ground level having an energy level Eand a high-order level having an energy level E, and a second quantum-confined structure has an energy level Ewhich is higher than the E, and the Eand the Eare substantially matched.