Patent ID: 7277069

Claim:
A method of determining new luminance value data to be displayed on a matrix display device, having pixels arranged in lines of rows and columns, said new luminance value data being based on original luminance value data which are coded to allow more than one grey level realization for a grey level to be displayed on said matrix display device by applying mutually different combinations of subfields said new luminance value data being coded in sub-fields wherein common values for a number of sub-fields are determined for a set of rows, characterized in that the method comprises the steps of: determining, for pixels which are adjacent to each other in a row of said set of rows and which have the same grey level, mutually different grey level realizations; and determining the common values for sub-fields of the pixels in a column comprised by pixels from said set of rows, the pixels having the same grey level realization, so as to enable simultaneous addressing of the set of rows for the subfields having common values.