A memory integrated type display device is provided which can simplify the circuit structure and suppress consumption power. The display device has a liquid crystal pixel unit having a plurality of display elements disposed in a matrix shape, a horizontal shift register for applying a voltage to the liquid crystal pixel unit, a digital/analog conversion unit, an amplifier, a scanning line drive unit for selecting scan lines in a vertical direction and a memory for storing display data, the memory being electrically connected between the amplifier and liquid crystal pixel unit.