Method of addressing a plasma display panel
AssigneeThomson Licensing
InventorsDidier Doyen, Jonathan Kervec
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Abstract
The object of the invention is to provide a system for encoding grey levels which makes it possible to reduce the problems of contouring by increasing the number of subscans using subscans common to several rows, thereby remedying the error due to the difference between the grey levels of simultaneously scanned cells. The invention provides a method and a device which make row groupings dynamically according to the content of the image.
Claims11
A method for displaying a video image on a display device comprising a plurality of cells, in which each cell is illuminated for an illumination time by means of a plurality of subscans each having a specific duration associated with an illumination weight, wherein the subscans are distributed as first and second subscans, wherein the first subscans are addressed for each row of the panel and wherein the second subscans are addressed simultaneously at row groupings having a number of rows which varies according to the different grey levels of the pixels of the grouped rows of the image displayed.
A display device comprising a plurality of cells organized in rows and columns, each cell being illuminated over a display period for a time proportional to a grey level by means of a plurality of subscans, each subscan having an address time during which the rows are addressed in succession, wherein it includes means for addressing the rows by row grouping, the number of rows of which varies according to the different grey levels of the pixels of the grouped rows of the image to be displayed.
Dependencies are inferred from the claim text.