Color management system having a transmissive panel and optical isolator
US6899432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 2003 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | May 8, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3141
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color management system for use with projection displays includes, for example, two or more analyzers positioned to receive light beams emitted from corresponding image assimilators, which each comprise a transmissive panel and a polarizing beamsplitter. Each analyzer is positioned to receive a light beam directly from an associated image assimilator before the light has passed through another optical element such as a light combiner. The analyzers are configured for producing filtered light outputs with improved contrast relative to the incoming light beams. These closely-coupled analyzers are able to remove substantially all of the noise before it has become indistinguishable, on the basis of polarization, from the light that comprises the desirable image. In an exemplary embodiment, an optical isolator is positioned to receive both a light output from a color management system and a reflection of the light output. The optical isolator is configured for isolating the light output from the reflection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.