Patent ID: 6424325
Filing Date: 2002-07-23
Classification: G09G

Abstract:
A circuit for driving a flat panel display comprising a plurality of display elements arranged in a matrix of rows and columns, and a plurality of first electrodes, each first electrode of the plurality of first electrodes being associated with display elements in a respective row or column, wherein said circuit drives said display in a sub field mode, and the circuit comprises:a timing generator configured to: divide a field period of a received display information into consecutive sub field periods, each sub field period including an address period preceding a display period, and each sub field period having a respective weight factor associated therewith, at least some of said weight factors differing from others of said weight factors, and generate an order in which the sub field periods having the respective weight factors occur during a field period, and a drive circuit configured to supply drive signals, during respective sub field periods corresponding to the respective weight factors, to respective addressed electrodes of said plurality of first electrodes, wherein for each respective display element, a combination of the weight factors for the sub field periods in which the respective display element is addressed during a given field period corresponds to a respective display element luminance value for the given field period, characterized in that the plurality of first electrodes is partitioned into at least first and second groups, the drive circuit supplies said drive signals to said at least first and second groups, and the timing generator generates a first order of sub field occurrence applied to the first group, and a second order of sub field occurrence different from said first order applied to the second group, whereby the order in which drive signals of respective weight factors are applied to the first group is different from the order in which the drive signals of the same weight factors are applied to the second group.