Efficient spatially modulated illumination system
US9170474B2 · kind B2 · utility
0Cited by
8References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2012 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Jan 18, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/317
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projector can include a projection lens that is positioned substantially one focal length away from a spatial light modulator. The projector may also include a non-imaging optic configured to illuminate the spatial light modulator. The non-imaging optic may include a light emitter and an etendue-preserving reflector. The projector can be configured to project an image created by the spatial light modulator at a distance using light from the non-imaging optic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.