Patent ID: 9261861
Filing Date: 2016-02-16
CPC Classification: G04R

Claim Text:
1. A radio-controlled timepiece comprising: a timekeeping unit which keeps date and time; a satellite radio wave receiving unit which receives a transmitting radio wave of a positioning satellite; a receiving term setting unit which sets a receiving term with the satellite radio wave receiving unit; a date/time obtaining unit which obtains date/time information from the transmitting radio wave received by the satellite radio wave receiving unit; an elapsed time counting unit which counts elapsed time from when the date and time is obtained by the date/time obtaining unit; and a first judging unit which judges whether the elapsed time is less than a first reference time determined based on a timekeeping error of the timekeeping unit and a format of a signal transmitted from the positioning satellite, wherein, (i) the receiving term setting unit sets a receiving term corresponding to transmitting timing of a block including correction information regarding a leap second among blocks of a predetermined length including one piece of the date/time information based on the date and time kept by the timekeeping unit when the first judging unit judges that the elapsed time is less than the first reference time; and (ii) the receiving term setting unit sets the receiving term corresponding to the block including the correction information regarding the leap second based on the obtained date/time information or a position of the format of receiving data regarding the obtained date/time information after setting the receiving term corresponding to the transmitting timing of any of the blocks based on the date and time kept by the timekeeping unit and obtaining the date/time information when the first judging unit judges that the elapsed time is not less than the first reference time.