Patent ID: 7307919
Filing Date: 2007-12-11
Classification: G04R

Abstract:
1. A radio-controlled timepiece comprising: a reception means for receiving time information modulated by rectangular wave pulses; a reception control means for controlling driving the reception means based on a preset schedule; a time information updating means for updating internal time information, based on the time information received by the reception means; a time adjustment storage means for storing how much the internal time information was adjusted by the time information updating means; and a time display means for displaying the time based on the internal time information; wherein the rectangular wave pulses have a rising edge or falling edge occurring at a one-second interval and have a pulse width that when measured from a reference timing that is the timing of the rising edge or falling edge of a pulse to the falling edge of a pulse that rose or the rising edge of a pulse that fell is less than the one-second interval and is one of a plurality of lengths; the reception control means comprises the normal time adjustment means drives the reception means for the time required to receive a full time code, and adjusts the internal time information by means of the time information updating means when time code reception is successful; and the simple time adjustment means comprises