High efficiency light source using solid-state emitter and down-conversion material
US7819549B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 2005 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | May 27, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/855
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light emitting apparatus includes a source of light for emitting light; a down conversion material receiving the emitted light, and converting the emitted light into transmitted light and backward transmitted light; and an optic device configured to receive the backward transmitted light and transfer the backward transmitted light outside of the optic device. The source of light is a semiconductor light emitting diode, a laser diode (LD), or a resonant cavity light emitting diode (RCLED). The down conversion material includes one of phosphor or other material for absorbing light in one spectral region and emitting light in another spectral region. The optic device, or lens, includes light transmissive material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.