An object is to provide a display device in which deterioration in display quality due to a change in voltage applied is reduced and a lower visible efficiency in changing display is prevented. The display device has a display controller configured to make the display portion perform display by switching a first still image display period including a writing period in which a first image signal is written and a holding period in which the first image signal is held, and a second still image display period including a writing period in which a second image signal is written and a holding period in which the second image signal is held. The display controller is configured to make a length of the writing period of the first still image display period and a length of the writing period of the second still image display period different from each other.