Efficient illumination for display systems and in methods for displaying
US7618147B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2005 |
| Grant date | Nov 17, 2009 |
| Priority date | — |
| Expiry date | Mar 28, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/7416
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display system (100, 200, 300, 350, 400, 450) for displaying an image is described. The display system (100, 200, 300, 350, 400, 450) typically comprises one or a plurality of individual light sources (102) and a light collecting stage (110, 210, 310, 410) which comprises a separate light collecting sub-system associated with each light source (102), or group of light sources (102). The display system (100, 200, 300, 350, 400, 450) typically comprises at least one light modulator (120) which is operable to modulate light received from the light collecting stage (110, 210, 310, 410) according to an image which is to be displayed. Finally a projection stage (130) is provided for projecting the image, typically on a projection screen. The present invention also relates to a corresponding method. The present invention is especially useful with light sources having a packaging around the light emitting surface such that the light sources cannot be physically placed adjacent to each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.