Light-emitting device and illuminating apparatus comprising the light-emitting device
US9677719B2 · kind B2 · utility
10Cited by
0References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2013 |
| Grant date | Jun 13, 2017 |
| Priority date | — |
| Expiry date | Jun 11, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8516
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light-emitting device may include a substrate, a light source arranged on the substrate, and a cover part spaced a certain distance apart from the light source and transmitting light emitted from the light source to outside. The cover part includes a first part, converting wavelengths of a part of light in light emitted from the light source and having different thicknesses at least in two different light-emitting directions of the light source, and a second part, having different thicknesses in the two different light-emitting directions to compensate the thicknesses of the first part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.