Invention Grant
- Patent Title: Satellite radio-controlled watch
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Application No.: US13634306Application Date: 2011-03-22
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Publication No.: US09606515B2Publication Date: 2017-03-28
- Inventor: Takushi Hagita , Akira Kato , Akinari Takada
- Applicant: Takushi Hagita , Akira Kato , Akinari Takada
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: CITIZEN HOLDINGS CO., LTD.,CITIZEN WATCH CO., LTD.
- Current Assignee: CITIZEN HOLDINGS CO., LTD.,CITIZEN WATCH CO., LTD.
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2010-073853 20100326; JP2010-073854 20100326
- International Application: PCT/JP2011/056818 WO 20110322
- International Announcement: WO2011/118573 WO 20110929
- Main IPC: G01S19/34
- IPC: G01S19/34 ; G04R20/02

Abstract:
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.
Public/Granted literature
- US20130009816A1 SATELLITE RADIO-CONTROLLED WATCH Public/Granted day:2013-01-10
Information query