A display device which can suppress erroneous display of a display panel is provided. A source driver receives a serial data signal in which a preamble and video data of the display panel are alternately continuous via an interface from a display controller. The source driver controls timing of supply of a gate signal from a gate driver based on the video data included in the serial data signal, and supplies a gradation voltage signal which corresponds to the video data to a plurality of data lines of the display panel. The source driver has a detection portion which detects that the interface is in an unstable state, and a gate reset signal output portion which outputs a gate reset signal for stopping an operation of the gate driver when the unstable state of the interface is detected at the time of the supply of the video data.