A power control module which can be used to automatically open a power circuit for electrically operated devices, particularly battery operated devices, during predetermined periods of non-use. The wiring structure supplies the voltage to the plurality of driver LSIs, with the wiring resistance gradually changing from a voltage supply point. Then, the data of the pre-generated image like a background image is recorded on a storage medium in advance. The bio-medical unit includes a power harvesting module, a wireless communication module, and a functional module.