Illumination systems utilizing multiple wavelength light recycling
US7040774B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2004 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | Sep 9, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B19/0061
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination system has a light source and a wavelength conversion layer within a light-recycling envelope. The light source is a light-emitting diode or a semiconductor laser. The light source will emit light of a first wavelength range that is transmitted through the wavelength conversion layer in order to convert a portion of the light of a first wavelength range into light of a second wavelength range. Light of both the first and second wavelength ranges will exit the light-recycling envelope through an aperture. The recycling of the light by the light-recycling envelope will enhance the output radiance and luminance of the light exiting the illumination system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.