Integrated asphere design for display
US8379322B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2008 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Jul 22, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3161
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection display system and method is provided. One or more light sources, such as solid state lasers, generates light of various colors that is modulated by a spatial light modulator, such as a digital micro-mirror device. The projection optics of the system include a telecentric rear group of lenses followed by a pair of aspheric lenses formed of a continuous piece of material. A folding mirror, such as a single-piece or multi-piece angular mirror, is disposed along the optical path between the aspheric lenses, to reduce the depth of the enclosure, and an aspheric mirror projects the image onto a projection screen. A folding mirror may be used after the aspheric mirror to further reduce the depth of the enclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.