Light emitting device
US10884172B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2019 |
| Grant date | Jan 5, 2021 |
| Priority date | — |
| Expiry date | Sep 10, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/872
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light-emitting device includes a light-emitting element having a light-emitting surface, and a plurality of protruding portions being separated from each other and disposed on the light-emitting surface. The protruding portions are transparent. Each of the protruding portions includes a light guide portion and a light distribution control portion. The light guide portion has a columnar configuration and is provided at a light-emitting surface side of the protruding portion. The light distribution control portion is provided on the light guide portion. The light distribution control portion is asymmetric with respect to a central axis of the light guide portion and has a tilted surface that is tilted with respect to the central axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.