Electronic projector with equal-length color component paths
US6532044B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2000 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Jul 21, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/02
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electronic (e.g., LCD) projector combines multiple projection lens assemblies with equal color component optical path lengths to provide improved display images and a compact arrangement. In one implementation, the projector includes a successive pair of angled dichroic mirrors that fold the red and blue color components of light in opposed directions. The green color component of light passes through the dichroic mirrors toward a pixelated electronic light modulator, such as a liquid crystal display, and an associated projection lens assembly. The red and blue color components of light are each folded again to propagate parallel with the green color component toward a pixelated electronic light modulator, such as a liquid crystal display, and an associated projection lens assembly. The separate projection lens assemblies are arranged in a non-linear, close-packed arrangement to receive the color components of light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.