In a liquid crystal display device having a configuration in which one pixel is divided into a plurality of sub pixels, low power consumption is realized by reducing an amplitude of a video signal. Each RAM cyclically converts analog signal values to digital, forming data packets. The controller stops the anti-shake operation after an exposure time and moves the movable unit to a first position after the anti-shake operation. In addition, the switch includes a mechanical element which co-operates with the control lever when the lock is closed, such that the switch indicates that the lock is closed only when the tooth of the retaining pawl co-operates with the second locking notch of the bolt. The integrated circuit is configured to monotonically vary the first control signal over a range of values and the count value is determined for individual values of the control signal.