Abstract: In a flat panel display device in which driving circuits and the like are arranged on an array substrate, a technology to realize a compact size and a low cost of an external control circuit is disclosed. At least one pumping circuit included in the external control circuit is arranged on the array substrate, and an output side capacitor connected between an output portion of the pumping circuit and the ground GND and an input side capacitor of a clock input portion are arranged outside the array substrate.

Abstract: A display has display pixels provided with digital memories, respectively. In each display pixel, a pixel electrode and a data line are connected to each other through a first switch, and the pixel electrode and the digital memory are connected to each other through a second switch. In a first display period, the second switches are turned off and the first switches are turned on, to display video data supplied from the data lines. In a second display period, the second switches are turned on and the first switches are turned off, to stop scan and data drivers and display video data stored in the digital memories.