Reduced color separation white enhancement for sequential color displays
US6536904B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 31, 2001 |
| Grant date | Mar 25, 2003 |
| Priority date | — |
| Expiry date | Dec 31, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3114
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for reducing the color separation in sequential color display systems. The disclosed approach adds a white (clear) segment 923 to the color filtering system 92 and applies an algorithm, which separates the luminance channel as much as possible into this white segment. As a result, in the case of a black-and-white image where color separation is most visible, color segments will have a minimal amount of energy in them, thereby reducing the color separation effect. The algorithm controls the process of transferring the energy from the colored segments into the white segment and also allows for a dynamic mode, where on a pixel-by-pixel basis, both color separation reduction is made for the white portions of the image and overall image brightness is improved in the non-white (color) portions of the image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.