Projector device capable of obtaining a high luminance without increasing output of light source
US6336724B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1999 |
| Grant date | Jan 8, 2002 |
| Priority date | — |
| Expiry date | Dec 17, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3167
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a projector device for magnifically projecting onto a screen a beam of light emitted from a light source which is irradiated at a mirror reflecting type light modulator after being color-separated into light beams of three primary colors and after respective light beams of primary colors modulated in the mirror reflecting type light modulator are synthesized by a color prism, a light beam emitted from a first light source is polarized into an “p” polarization by a polarization converter and a light beam emitted from a second light source is polarized into a “s” polarization by the polarization converter, thereby both light beams are synthesized by a polarization beam splitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.