Patent ID: 6118425
Filing Date: 2000-09-12
Classification: G09G

Abstract:
A liquid crystal display including a liquid crystal display panel of a passive matrix display type having a plurality of scanning electrodes and a plurality of data electrodes, comprising:scanning electrode driving means for sequentially and simultaneously selecting (m) scanning electrodes (m is an integer of 2 or larger) corresponding to a row which is a display target and applying a selective scanning voltage at a level based on a value of an orthogonal function to the scan electrodes simultaneously selected;data electrode driving means for generating a voltage by which display data in the row can be displayed on the basis of display data of the row of said scanning electrodes simultaneously selected and the value of the orthogonal function used to determine the selective scanning voltage applied to said scanning electrodes and applying the voltage to said plurality of data electrodes;counting means for obtaining the sum of display data which is ""on"" among display data in the row of each of said scanning electrodes simultaneously selected every row; andselective scanning voltage correcting means for correcting the level of the selective scanning voltage applied to said scanning electrodes simultaneously selected on the basis of the sum of display data which is ""on"" in the row of each of said scanning electrodes and the value of the orthogonal function used to determine the selective scanning voltage applied to said scanning electrode so as to compensate reduction in an effective value of a voltage applied to each of liquid crystal cells corresponding to said scanning electrodes.