s. In the foregoing active matrix device, when the potential of the second scanning-signal electrode has the same potential as that of the first scanning-signal electrode, the thin flexible film is not supplied with the static electric force. Thus, the thin flexible film is not deflected. Therefore, the resistance between the data-signal electrode and the pixel electrode is infinitely large. Thus, the non-conductive state can be maintained. When the potential of the second scanning-signal electrode is different from that of the first scanning-signal electrode, the thin flexible film is deflected by the static electric force. As a result, the conductive film is brought into electrical contact with the data-signal electrode and the pixel electrode disposed below the thin flexible film in the direction of the deflection of the thin flexible film. As a result, the data-signal electrode and the pixel electrode are conducted to each other. When the voltage of each of the scanning-signal electrode is made to be zero, the thin flexible film is moved to the original position owning to the elastic force. As a result, the data-signal electrode and the pixel electrode are again brought to the non-conductive state. Thus, the 