Illumination module
US7423802B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2007 |
| Grant date | Sep 9, 2008 |
| Priority date | — |
| Expiry date | Aug 29, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/39
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An illumination module may provide light in a plurality of colors including Red-Green-Blue (RGB) light and/or white light. The light from the illumination module may be directed to a 3LCD system, a Digital Light Processing (DLP®) system, a Liquid Crystal on Silicon (LCoS) system, or other micro-display or micro-projection systems. In one embodiment the illumination module includes a laser configured to produce an optical beam at a first wavelength, a planar lightwave circuit coupled to the laser and configured to guide the optical beam, and a waveguide optical frequency converter coupled to the planar lightwave circuit and configured to receive the optical beam at the first wavelength, convert the optical beam at the first wavelength into an output optical beam at a second wavelength, and may provide optically coupled feedback which is nonlinearly dependent on a power of the optical beam at the first wavelength to the laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.