Method and apparatus for reducing the visual effects of nonuniformities in display systems
US7990353B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 18, 2006 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Apr 30, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0693
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method is provided for compensating for output nonuniformity on a display. The method comprises characterizing the display. The method further includes creating a set of data tables wherein one table provides data for compensation along vertical axes of the display and a second table provided data for compensation along horizontal axes of the display, and wherein components of the tables include a linear offset factor to correct data for nonuniformity and a slope factor which permits gray scale information to be recovered at points near the limits of the gray scale range. The characterizing step may include using a optical detector to obtain optical output information from the display. The slope factor may be calculated to preserve top end gray scale range of the display by adjusting luminous output so that input data level maps to separate output grey levels between a truncated and an untruncated level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.