Assembly for projecting an image onto a projection surface
US7001026B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2002 |
| Grant date | Feb 21, 2006 |
| Priority date | — |
| Expiry date | Jun 17, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3105
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an apparatus for projecting a picture on a projection screen, having a light source (1) emitting light, whereby a luminous area (3) can be generated with said light, having a reflective light modulator (12, 13, 14) that can receive the light emitted from the luminous area (3) and modulates it for the purpose of generating a picture, and further having a projection optics (16) arranged following the light modulator (12, 13, 14) in order to project the picture on the projection screen (17), wherein an optics system (7, 23, 31, 33, 34) is arranged in front of the light modulator (12, 13, 14), wherein the optics system images the light received from the luminous area (3) on the light modulator (12, 13, 14) on the one hand, and on the other hand images the light modulated by means of the light modulator (12, 13, 14) in order to generate a picture in the intermediate image level (ZE) that can be projected on the projection screen by the projection optics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.