Patent ID: 7839373

Claim:
A display device comprising: a display panel which has a plurality of display pixels, video lines for applying video data to the respective display pixels, and scanning lines for applying a scanning voltage to the respective display pixels, each display pixel including a memory part for storing the video data, a pixel electrode and a switch part for selectively applying a first video voltage or a second video voltage different from the first video voltage to the pixel electrode corresponding to the video data stored in the memory part; and a reset circuit which allows the first video voltage and the second video voltage to have the same voltage when an outer power source voltage for the display device is turned off, the reset circuit including a first combinational logic circuit and a second combinational logic circuit, wherein a first input signal and a reset signal are inputted to the first combinational logic circuit and the first video voltage is outputted from the first combinational logic circuit, wherein a second input signal and the reset signal are inputted to the second combinational logic circuit and the second video voltage is outputted from the second combinational logic circuit, wherein the first combinational logic circuit and the second combinational logic circuit output the same voltage when the reset signal becomes effective, and wherein the outer power source voltage is inputted to the reset circuit and a power source circuit, the power source circuit has a potential holding capacitance and at least one diode connected in series, an anode of the at least one diode is connected with the outer power source voltage, a cathode of the diode is connected with the potential holding capacitance, the power source circuit generates an internal power source voltage, the internal power source voltage is a voltage at a node between the potential holding capacitance and the diode, the internal power source voltage is turned off upon a lapse of a predetermined period of time following a time at which the outer power source voltage is turned off, the reset signal becomes effective when the outer power source voltage is turned off, and the first input signal and the second input signal are brought into an OFF state when the internal power source voltage is turned off.