Patent ID: 7522130

Claim:
Method for processing video picture data for display on a display device having a plurality of luminous elements corresponding to pixels of a video picture, wherein the brightness of each pixel is controlled by at least one sub-field code word with which the luminous element/s are activated or inactivated for light output in small pulses corresponding to sub-fields in a video frame, each sub-field having assigned a sub-field weight, the sub-field determining the length in time a pixel is activated during this sub-field, the method comprising the steps of: dithering said video picture data and sub-field coding said dithered video picture data for brightness control, transforming said video picture data according to a non-linear function representing the Weber-Fechner-law before said dithering step and sub-field coding said dithered video picture data for brightness control, wherein in the step of sub-field coding a specific code is used in which by corresponding bit entries it is avoided that in a frame period a sub-field is inactivated between two activated sub-fields and wherein the sub-field weights are adapted to grow according to the Inverse of the non-linear function representing the Weber Fechner-law, thereby integrating the inverse transformation of the dithered video picture data in the step of sub-field coding.