Patent ID: 6483497
Filing Date: 2002-11-19
Classification: G09G

Abstract:
A drive circuit for a display device having a plurality of scanning electrodes to which a selection signal and a non-selection signal are applied and a plurality of signal electrodes to which data signals are applied, said drive circuit comprising:scanning electrode drive means for (1) grouping the plurality of scanning electrodes into p groups, wherein each of the p groups comprises at least i scanning electrodes, wherein p and i are integers of at least two, (2) sequentially selecting the p groups of the plurality of scanning electrodes and applying the selection signal substantially simultaneously to the scanning electrodes in the selected group during each of selection periods, each of the p groups being selected plural times per one frame, (3) applying the non-selection signal, immediately after applying the selection signal, substantially simultaneously to the scanning electrodes in each one of the p groups during each of non-selection periods immediately after each of the selection periods; scanning data generation means for generating data representing a level of the selection signal based on an orthogonal function, the orthogonal function for determining the level of the selection signal from a plurality of levels of the selection signal to be applied to each of the scanning electrodes in the selected groups during each of the selection periods; and signal electrode drive means comprising memory means for storing display data, the signal electrode drive means applying the data signals to the plurality of signal electrodes, wherein a level of the data signal applied to each of the signal electrodes is determined based on the data generated by the scanning data generation means and the display data stored in said memory means.