Method and apparatus for increasing effective contrast ratio and brightness yields for digital light valve image projectors
US8860891B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Aug 2, 2013 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Aug 2, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3197
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for increasing the effective contrast ratio and brightness yields for digital light valve image projectors using a variable luminance control mechanism (VLCM), associated with the projector optics, for modifying the light output and provide a correction thereto; and an adaptive luminance control module (ALCM) for receiving signals from the video input board, the adaptive luminance control module producing a signal on a VLCM bus connecting the variable luminance control mechanism and the adaptive luminance control module, the signal causing the variable luminance control mechanism to change the luminance of the light output and provide a corrected video signal for the projector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.