A plurality of pixels are arranged at each intersection of a plurality of scanning lines and a plurality of signal lines, and respectively includes a liquid crystal element displaying grayscales according to a grayscale potential of each signal line during the selection of each scanning line. To two pixels which are adjacent to each other in an extending direction of a signal line and correspond to two scanning lines selected by a scanning line driving circuit in each selection period, a signal line driving circuit supplies a grayscale potential according to a grayscale computed as the weighted average of grayscales designated by display data supplied to a display control circuit for each of the two pixels.