| 摘要 |
A radio-controlled wristwatch includes: a receiving means (11) that receives radio waves from a satellite and extracts both information to determine an intra-week time and information to determine a week; a clocking means that clocks a current day and time; a day-and-time correcting means that corrects the current day and time as clocked by the clocking means; a week-information holding means that holds the information to determine the week; a week-information updating means that updates, on the basis of the current day and time as clocked by the clocking means, the to-determine-the-week information held by the week-information holding means; and a week-information reception restricting means that restricts the reception of the to-determine-the-week information by the receiving means and that causes the receiving means to receive the to-determine-the-week information in a predetermined case. Because of that inclusion, the radio-controlled wristwatch, which receives, from the satellite in the Global Positioning System, the radio waves including the time information, can reduce the power consumption required for that reception. |
