Projection apparatus and image adjustment method
US8322865B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2010 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Mar 18, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3114
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection apparatus including an illumination system, a light valve, and a color filtering module is provided. The illumination system is capable of emitting an illumination beam. The light valve is disposed in the transmission path of the illumination beam and capable of converting the illumination beam into an image beam. The color filtering module is disposed in the transmission path of the illumination beam between the illumination system and the light valve and includes a plurality of colored filters and a gray filter. The gray filter is capable of reducing the intensity of the illumination beam passing through the gray filter. An image adjustment method is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.