Patent ID: 6407965
Filing Date: 2002-06-18
Classification: G04C

Abstract:
A timepiece comprising:a case back made of a thermally conductive material; an upper case body made of a thermally conductive material and disposed opposite to the case back; a lower case body made of a thermally insulating material and disposed between the upper case body and the case back; a thermoelectric generator unit for generating an electromotive force in accordance with heat conducted from the case back; at least one step-up circuit for stepping up the electromotive force generated by the thermoelectric generator unit; a storage member for storing power and for storing the electromotive force stepped up by the step-up circuit; a timepiece driving circuit driven by power stored in the storage member or by electromotive force stepped up by the step-up circuit; a power supply operating control circuit for controlling a power flow from the step-up circuit to the storage member and for controlling whether the electromotive force stepped up by the step-up circuit or the power stored in the storage member is supplied to the timepiece driving circuit; and a display member for displaying time information in accordance with a signal output from the timepiece driving circuit.