Solid state light engine optical system
US7152977B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2003 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Sep 14, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical system for use in projection based displays includes a plurality of solid state light sources associated with a plurality of total internal reflection based compound hyperbolic emitters, a graduated dichroic filter based device for homogenizing light output from the plurality of solid state light sources, a ferro-electric liquid crystal on silicon device for illumination with light output from the array of solid state light sources, and a polarization diffuser for homogenization of light at the ferro-electric liquid crystal on silicon device, wherein the polarization diffuser is positioned at a point in space, in the optical system, where the size of a beam of light transmitted from the graduated dichroic filter based device is substantially at a maximum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.