Optical projector using reflective liquid crystal panels
US6604828B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 4, 2001 |
| Grant date | Aug 12, 2003 |
| Priority date | — |
| Expiry date | Jan 4, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/006
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention generally relates to an optical projecting system having a light generating means, a light splitting and synthesizing means, a beam polarization converter, a red light reflective crystal panel, a green light reflective crystal panel, a blue light reflective liquid crystal panel and a projecting lens. The beam polarization converter polarizes lights to a specific polarization distribution. Further the light splitting and synthesizing means splits the polarized light to three beams with different colors respectively. Thus, three different color beams are modulated by three reflective liquid crystal panels to produce three color projecting beams. After the light splitting and synthesizing means synthesizes the color projecting beams, the synthesized projecting light is emitted out via the projecting lens.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.