An AM neighboring interference removing method and circuit is provided which can select only a desired AM modulation wave even if an interference AM modulation wave is partially superposed upon the desired AM modulation wave. The plate of the lighting control module is detachably assembled with the lighting control device. Rotation is achieved through a rotational connector disposed between the handle and the brush element. Reverse bias is readily applied to the organic light emitting element by applying voltage to the element that has a rectifying characteristic in the forward direction from an alternating current source.