An electro-optical display device includes an electro-optical panel, a scanning line drive circuit for scanning the scanning lines of the panel during a selection period, and a signal line drive circuit for outputting a data signal to a predetermined pixel through the corresponding data line of the panel in synchronization with the scanning of the scanning line drive circuit. During the selection period during which the data signal is output to the predetermined pixel, the duration of the ON voltage interval corresponding to a grayscale level having the longest OFF voltage interval is longer than the duration of the OFF voltage interval corresponding to a grayscale level having the longest ON voltage interval.