Actuator device with pilot lamp and push button comprising such a device

The device has a fixed part (1) serving as a housing body, and a movable part (2) movable between a rest position and an active position. A controlling system (4) is provided for controlling displacement of the movable part with respect to the fixed part. An electric voltage generator element i.e. piezoelectric material blade (7), provided between the movable part and the fixed part receives two constraints or deformations based on two moving distances to provide voltages of different amplitudes. An LCD (3) connected to the blade provides a display of two stable states.