Solid state lighting devices without converter materials and associated methods of manufacturing
US9601658B2 · kind B2 · utility
0Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2015 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Jul 27, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/824
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
Solid state lighting devices that can produce white light without a phosphor are disclosed herein. In one embodiment, a solid state lighting device includes a first semiconductor material, a second semiconductor material spaced apart from the first semiconductor material, and an active region between the first and second semiconductor materials. The active region includes a first sub-region having a first center wavelength and a second sub-region having a second center wavelength different from the first center wavelength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.