Method and device for compensating burn-in effects on display panels
US7312767B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2002 |
| Grant date | Dec 25, 2007 |
| Priority date | — |
| Expiry date | Jan 31, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Phosphor based display technologies show artefacts like “sticking” or “ghost” images produced by “marking” or “burn-in” effects. In order to remove these artefacts, it is proposed to activate a portion of the display screen as a wiper and to move the wiper at least one time over the complete display screen or a part of the display screen. The wiper will homogenize the complete video screen in order to make the ghost images less visible. Another embodiment is dedicated to the reduction of the short-term burning effect. Here, a dynamic correction of the displayed picture is done. A memorized picture could be subtracted from the current picture in order to reduce the visibility of the short term sticking effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.