Patent ID: 6963330

Claim:
An actuated film display device comprising: a first fixed electrode; a first movable film electrode, which is placed to face the first fixed electrode to form a first optical path on an opposing side to the first fixed electrode, and which has a fixed end and a movable end, the movable end being displaced toward the first fixed electrode by application of a voltage not less than a first critical voltage between the first fixed electrode and the first movable film electrode, thereby shutting off the first optical path; a second fixed electrode placed at a predetermined distance from the first fixed electrode; a second movable film electrode, which is placed to face the second fixed electrode to form a second optical path on an opposing side to the second fixed electrode, which has a fixed end and a movable end, the movable end being displaced toward the second fixed electrode by application of a voltage not less than a second critical voltage between the second fixed electrode and the second movable film electrode, thereby shutting off the second optical path, the second critical voltage being different from the first critical voltage due to a dimensional difference between the first and the second movable film electrodes or a positional arrangement of the first and the second movable film electrodes to the first and the second fixed electrodes, the first movable film electrode and the second movable film electrode being connected to a first signal line, and the first fixed electrode and the second fixed electrode being connected to a second signal line; a plurality of pixels, each of the plurality of pixels including a pair of the first fixed electrode and the first movable film electrode and a pair of the second fixed electrode and the second movable film electrode; and a variable voltage source having a first output terminal and a second output terminal, the first signal line being connected to the first output terminal, and the second signal line being connected to the second output terminal, wherein the plurality of pixels provide a gray scale display in accordance with a potential applied by the variable voltage source between the first signal line and the second signal line.