Light emitting device and projector
US11901695B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2020 |
| Grant date | Feb 13, 2024 |
| Priority date | — |
| Expiry date | Feb 28, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S2301/176
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A light emitting device includes: a substrate; a laminated structure that is provided on the substrate and that includes a plurality of columnar portions; and an electrode provided at an opposite side of the laminated structure from the substrate. The columnar portion includes a first semiconductor layer, a second semiconductor layer of a conductivity type different from that of the first semiconductor layer, and a light emitting layer located between the first semiconductor layer and the second semiconductor layer. The electrode is connected to the second semiconductor layers in the plurality of columnar portions, and includes a first electrode layer formed of a material that has a work function smaller than that of the second semiconductor layer, and a second electrode layer that is connected to the first electrode layer and that has a work function smaller than that of the first electrode layer. An interface between the first electrode layer and the second electrode layer has an uneven shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.