Patent ID: 9606515
Date: 2017-03-28
CPC Classifications: G01S,G04R

Claim:
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.