Highly efficient LED lamp
US6814470B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2002 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Dec 11, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A highly efficient LED lamp includes an optical module and a housing. The optical module has at least one light emitting diode (LED) that emits light with a wide divergence, a non-imaging optical (NIO) element and a transparent window. The NIO element includes a refractive member located around a LED optical axis and a total internal reflection member located around the refractive member. The refractive member and the total internal reflection member are integrated in a single transparent element having a mutual focal point, wherein the NIO element collects a significant amount of light emitted by the LED with wide divergence located at the focal point, to compress the collected light with high efficiency into a beam with a generally different angular spread in a horizontal plane and a vertical plane and to direct the compressed light outside of the lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.