Patent ID: 7190333
Filing Date: 2007-03-13
Classification: G09G

Abstract:
1. A method of coding a video image displayed on a plasma display panel comprising a plurality of cells arranged in rows and columns, the video levels of the pixels of the image being defined by n-bit video words, each bit, depending on its state, illuminating or not illuminating the cell to which it is addressed for a specific time called the subfield, wherein, for video levels GL 1 and GL 2 to be displayed by a pair of cells situated in the same column and in two adjacent rows of the panel, video words VW 1 and VW 2 are selected, said words comprising at least one common bit addressed simultaneously to the two cells at the moment of displaying the image and corresponding to levels equal or approximately equal to the video levels GL 1 and GL 2 such that, if GL 1 >GL 2 , then the temporal centre of gravity of the illumination generated by the video word VW 1 is greater than that generated by the video word VW 2 below a predetermined video level.