Light emitting device having columnar parts surrounded by concavo-convex shapes and projector
US11624973B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 2020 |
| Grant date | Apr 11, 2023 |
| Priority date | — |
| Expiry date | Jun 4, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/856
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light emitting device includes a substrate, a first semiconductor layer provided to the substrate, a laminated structure disposed at an opposite side to the substrate of the first semiconductor layer, and including a plurality of columnar parts, a first electrically-conductive layer as a surface layer at laminated structure side in the first semiconductor layer, and a second electrically-conductive layer opposed to the first electrically-conductive layer via the laminated structure, wherein the columnar part includes a light emitting layer configured to emit light, a second semiconductor layer which is disposed between the light emitting layer and the first electrically-conductive layer, and a third semiconductor layer disposed between the light emitting layer and the second electrically-conductive layer, concavo-convex shapes are formed on a surface of the first electrically-conductive layer, an insulating layer is disposed on the first electrically-conductive layer, and electrode layers are disposed so as to cover an area where the insulating layer is disposed, and some of the concavo-convex shapes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.