Wavelength-converting light-emitting devices
US7196354B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2005 |
| Grant date | Mar 27, 2007 |
| Priority date | — |
| Expiry date | Oct 24, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8586
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A light-emitting device is provided. The device may include a thermally conductive region in contact with a wavelength-converting region (e.g., a phosphor region). The thermally conductive region may aid in the extraction of heat resulting from light absorption in the wavelength-converting region, which, if excessive, may impair device operation. The presence of a thermally conductive region can enable devices including wavelength-converting regions to operate even at high power levels (e.g., light generated by the light-generating region and/or by the light-emitting device having a total power greater than 0.5 Watts) for long operating lifetimes (e.g., greater than 2,000 hours).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.