According to one embodiment, a display device displays an n−1th frame (n is an integer which is greater than or equal 2) and an nth frame in this order. The display device includes a display panel, calculator, adjuster, and controller. The calculator calculates power consumption of the n−1th frame. The adjuster determines whether or not the nth frame is brighter than the n−1th frame, and adjusts brightness of the nth frame based on a brightness adjustment magnification of the nth frame calculated based on the power consumption of the n−1th frame and a decreasing function, when the nth frame is not brighter than the n−1th frame. The controller stops light emission with an arbitrary timing when the nth frame is displayed, when the nth frame is brighter than the n−1th frame.