Loading patent…
AssigneeThomson Licensing
InventorsSebastien Weitbruch, Axel Goetzke, Rainer Zwing
Estimating the term…
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 (10) as a wiper and to move the wiper at least one time over the complete display screen (10) or a part of the display screen (10). 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.
Method for processing video pictures for displaying on a display screen, characterized by computing a correction picture on the basis of at least one preceding picture already displayed on the display screen (10), combining the correction picture with a current picture and displaying the combined picture for reducing ghost images resulting from the at least one preceding picture.
Method for compensating burn-in effects on a display screen, characterized by, activating the cells in a geometrical area of the display screen (10), hereinafter called wiper, wherein the wiper is moved at least one time over the complete display screen (10) or. a part of the display screen.
Device for processing video pictures for displaying on a display screen (10), having included, computing means (20, 22) for computing a correction picture on the basis of at least one preceding picture already displayed on the display screen (10), combining means (19) for combining the correction picture with a current picture and controlling means (11) for driving the display screen (10) to display the combined picture for reducing ghost images resulting from the at least one preceding picture.
Device for compensating burn-in effects on a display screen (10), said device having included a wiper generator (15) for generating a video picture containing an geometrical area hereinafter called wiper for driving a portion of the display screen (10) in a manner that the characteristics of the display elements are homogenized and having included controlling means (11) for activating the wiper generator (15) and generating timing signals for moving said wiper at least one time over the complete display screen (10) or a part of the display screen (10).
Dependencies are inferred from the claim text.