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. 11, 2023
Filed:
Mar. 25, 2020
Seiko Epson Corporation, Tokyo, JP;
Sophia School Corporation, Tokyo, JP;
Shunsuke Ishizawa, Shinjuku, JP;
Katsumi Kishino, Akiruno, JP;
Abstract
There is provided a light emitting device including: a substrate; a laminated structure provided on the substrate and having a plurality of first columnar portions and a plurality of second columnar portions; and a first electrode and a second electrode, in which the first columnar portion includes a first semiconductor layer, a second semiconductor layer having a conductivity type different from the first semiconductor layer, and a light emitting layer provided between the first semiconductor layer and the second semiconductor layer, light generated in the light emitting layer propagates through the plurality of first columnar portions and the plurality of second columnar portions, a height of the second columnar portion is equal to or larger than a sum of a thickness of the first semiconductor layer and a thickness of the light emitting layer, and is lower than a height of the first columnar portion, the first semiconductor layer is provided between the substrate and the light emitting layer, the first electrode is electrically coupled to the first semiconductor layer, the second electrode is electrically coupled to the second semiconductor layer, and the second columnar portion is not electrically coupled to the second electrode.