Projector
US7384151B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 2005 |
| Grant date | Jun 10, 2008 |
| Priority date | — |
| Expiry date | May 29, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide a projector capable of obtaining a bright projection image with good color balance by efficient cooling in the case of using light source parts having different wavelength characteristics, a projector has plural light source parts to supply illumination lights, a cooling part to cool light source parts, spatial light modulators to modulate the illumination lights from the light source parts according to image signals, and a projection lens to project the lights modulated by the spatial light modulators, and the light source parts provide different amounts of illumination lights that change depending on the temperature changes of the light source parts. The cooling part cools the light source parts so that they provide amounts of light within a predetermined range with the amount of illumination light provided when one of the light source parts are at a reference temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.