Projector optics and projector with light source of LEDs
US7101049B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 4, 2004 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Mar 1, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/315
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention is directed to downsized projector optics and projector both of which employ an LED light source attaining the enhanced efficiency of the quantity of the emitted light. The projector optics and the projector respectively include, in position, a polygon-based conical polyhedron prism of which reflection surfaces are opposed to the LED light source; a light tunnel, a PS converting element, a polarized beam splitter and a LCOS all of which are provided in the optical axis of the reflected light from the polygon-based conical polyhedron prism; and a projection lens placed in the optical axis of the transmitted light from the polarized beam splitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.