Remote-phosphor LED downlight
US8016443B2 · kind B2 · utility
79Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 1, 2009 |
| Grant date | Sep 13, 2011 |
| Priority date | — |
| Expiry date | Mar 17, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21Y2115/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An embodiment of a collimating downlight has front-mounted blue LED chips facing upwards, having a heat sink on the back of the LED chips exposed in ambient air. The LED chips are mounted in a collimator that sends their blue light to a remote phosphor situated near the top of the downlight can. Surrounding the remote phosphor is a downward-facing reflector that forms a beam from its stimulated emission and reflected blue light. The phosphor thickness and composition can be adjusted to give a desired color temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.