Patent ID: 7227581

Claim:
A method for processing video pictures, useful for large area flicker effect reduction, the video pictures comprising pixels having assigned one or more pixel value representing luminance or colour component of the pixel, the pixel values being digitally coded into digital code words, the digital code word determining the length of the time period during which the corresponding element of a display is activated, wherein to each bit of the digital code word a certain activation duration is assigned, defining a sub-field, the sum of the durations of the sub-fields according to a given code word determining the length of the time period during which a corresponding display element is activated, said method comprising the steps of: organizing the sub-fields for a frame period being characterized by the reciprocal value of the frame repetition rate in two consecutive groups, and adjusting the starting times of the two sub-field groups to a time raster corresponding to a doubling of the frame repetition rate by adding a first blanking period of a first dedicated length behind the last sub-field of the first sub-field group and a second blanking period of a second dedicated length behind the last sub-field of the second sub-field group, wherein, the first and second blanking periods are distinct from the addressing and erasing periods of a sub-field.