this invention relates to gradation display by a pulse width control method in every pixel in a capacitive display apparatus such as a liquid crystal display apparatus . the driving voltage applied to the electrodes is varied slowly , and the number of gradations of gradation display by the pwm method is increased . since the capacitive display apparatus is used , for each electrode further from the drive circuit , the driving pulse is more influenced and its persisting duration is extended . as a result , even in identical gradation data , uneven colors may occur . the pulse width applied to the electrodes is gradually decreased as scanning of the electrodes sequentially occurs . therefore , the brightness of the capacitive display apparatus may be made uniform over the entire screen surface .