Provided is a power supply device, which is capable of coping with semiconductor light source loads to be set in various ways, and has high efficiency, in which a current to be supplied to each of the loads has a small ripple. The locking portion and suction pad hold a plate to which an elastic restoration force is applied. The application code identifies an Internet-based application. The signal processing section processes the electric signal and generates a digital image signal corresponding to the plurality of relative positions.