Method and apparatus for minimizing false image artifacts in a digitally controlled display monitor
US6151001A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 1998 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Jan 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G3/2935
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This invention is directed to improve visual effects on digital display devices that use time and space modulation methods to display grayscale values. A distributed line technique is utilized to provide grayscale capability. The grayscale display is illuminated by energizing pixels of a weighted grid of eight line addresses. The first grid line illuminates pixels based on the first selected bit of the grayscale value for those pixels, the second grid line pixels are illuminated based on the second selected bit of the grayscale value for those pixels, the third grid line pixels are base on the third selected bit of the grayscale value for those pixels, etc. until all pixels for all eight grid lines have been selected. Thereafter, a second set of grid lines is accessed during the second addressing period, a third set is accessed during the third addressing period, and so forth until all grid sets have been accessed. There are N grid sets where N is the number of time slots allocated per frame time. The visual grayscale brightness of each pixel is determined by the selection of the grid sets and the time slot allocated for the grid sets. The bit value selection, grid set allocation, …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.