According to one embodiment, a display device includes an array substrate including pixel electrodes arranged in a matrix, gate lines and auxiliary capacitance lines extending a first direction, signal lines extending a second direction, and a driving circuit configured to drive the gate lines, the signal lines, and the auxiliary capacitance lines, a counter substrate arranged opposite the array substrate, a liquid crystal layer held between the substrates, and a controller configured to control the driving circuit in such a manner that a polarity of a signal supplied to each of the signal lines varies in units of horizontal periods during a frame period when the polarity control signal for the first scan is identical to the polarity control signal for the second scan.