Satellite radio-controlled watch

摘要

Provided is a satellite radio-controlled watch, which is capable of holding back a receiving operation when in a posture that does not allow normal reception of a satellite signal, and is capable of performing a receiving operation under conditions varied to suit the type of reference information to be obtained. The satellite radio-controlled watch includes: a reception circuit (31) for receiving a satellite signal; and a controller (47) for sequentially detecting a received light amount of the satellite radio-controlled watch, calculating a received light variation which is an amount of change of the received light amount, and controlling the reception circuit (31) to start an operation of receiving the satellite signal, based on the received light variation. Alternatively, the controller (47) stores a condition for activating the reception circuit in order to obtain the reference information, in association with each piece of the reference information, and determines, when each piece of the reference information is obtained, whether or not the activation condition stored in association with each piece of the reference information is satisfied, and then controls the reception circuit (31) to start an operation of receiving the satellite signal, based on a result of the determination.

主权项

1. A satellite radio-controlled watch which adjusts time based on a satellite signal transmitted from a satellite, comprising:
a receiver configured to receive the satellite signal; a solar battery; a generated electricity amount detecting unit configured to sequentially detect a received light amount of light received by the solar battery; and a controller configured to have functions of: calculating a received light variation which is an amount of change of the received light amount; judging whether the received light amount exceeds a first threshold which stands for that the satellite radio-controlled watch is outdoor or not; judging whether the received light variation exceeds a second threshold which stands for change in posture of the satellite radio-controlled watch; and controlling the receiver to start an operation of receiving the satellite signal in case that the received light amount is judged to exceed the first threshold and the received light variation is judged to exceed the second threshold.