Display device having an image erasing circuit that is independent of the driving circuit and an image erasing method

A method for controlling a non-volatile display device, the method comprising:

• driving the non-volatile display device to create an image by controlling voltages applied to a first electrode and a plurality of second electrodes of the non-volatile display device, the non-volatile display layer being disposed between the first electrode and the plurality of second electrodes;
• driving the non-volatile display layer by applying potentials to the plurality of second electrodes to correspond to information of the displayed image, respectively;
• connecting the first electrode to an external power source through a connector;
• and
• detecting that a plug for supplying the external power source is inserted into the connector,
• wherein the display image is erased by connecting the first electrode to the external power source through the connector in the connecting step, independent of the driving circuit, when the driving circuit is broken and the displayed image cannot be erased, to make a potential of the first electrode different from the potentials of the plurality of second electrodes, and
• when the detecting step detects that the plug is inserted into the connector, the external power source is electrically connected to the first electrode.