Color filtering device
US7905601B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2007 |
| Grant date | Mar 15, 2011 |
| Priority date | — |
| Expiry date | Sep 15, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B33/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color filtering device including a color filter, a plurality of polarization beam splitting units, a plurality of reflecting units, and a plurality of wave plates is provided. The color filter has a plurality of filtering parts and a plurality of light shielding parts alternately arranged thereon. Each of the polarization beam splitting units is disposed in front of one of the filtering parts and makes an angle with a corresponding filtering part. Each of the reflecting units is disposed in front of one of the light shielding parts and makes an angle with a corresponding light shielding part. Each of the wave plates is substantially parallel to one of the filtering parts. Each of the polarization beam splitting units is disposed between a pair of a wave plate and a filtering part. The color filtering device has both color filtering function and polarization conversion function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.