A display device includes a pixel array having a plurality of pixels, a
plurality of first signal lines and a plurality of second signal lines. A
first driving circuit outputs scanning signals to the plurality of first
signal lines, and a second driving circuit outputs display signals to the
plurality of second signal lines. Each pixel of the plurality of pixels
is operated in a normally black-displaying mode, the first driving
circuit repeats a first step of sequentially selecting N lines of the
plurality of first signal lines and a second step of selecting Z lines of
the plurality of first signal lines that are separate from the N lines,
where N and Z are natural numbers, and the second driving circuit repeats
outputting N times the display signals and outputting one time a blanking
signal which masks an image displayed on corresponding pixels.