Electronic timepiece and control method for an electronic timepiece

• US 8,953,416 B2
• Filed: 08/06/2013
• Issued: 02/10/2015
• Est. Priority Date: 06/19/2002
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Fujisawa, Teruhiko
• Primary Examiner(s): Johnson, Amy Cohen
• Assistant Examiner(s): COLLINS, JASON M
• Application Number:
  US13/960,179
• Publication Number:
  US 20130322219A1
• Time in Patent Office: 553 Days
• Field of Search: 368/47, 342/357.63
• US Class Current: 368/47
• CPC Class Codes: G01S 19/14 specially adapted for specific applications
• CPC Class Codes: G01S 19/34 Power consumption
• CPC Class Codes: G04C 11/02 by radio time setting brought into action by radio G04C9/02
• CPC Class Codes: G04G 5/002 brought into action by radio
• CPC Class Codes: G04R 20/02 the radio signal being sent by a satellite, e.g. GPS
• CPC Class Codes: G04R 20/04 Tuning or receiving; Circuits therefor

Abstract

An electronic device comprises a receiver configured to receive a satellite signal; a time generator configured to generate time; and a processor configured to selectively execute a first time correction processing or a second time correction processing. The first time correction processing includes acquiring time information based on the received satellite signal and correcting the time based on the acquired time information. The second time correction processing includes calculating the position of the electronic device based on satellite orbit information and the received satellite signal, and correcting the time based on the calculated position.

Claims

1. An electronic device, comprising:

a receiver configured to receive a satellite signal;

a time generator configured to generate time; and

a processor configured to selectively execute a first time correction processing or a second time correction processing;

wherein the first time correction processing includes acquiring time information based on the received satellite signal and correcting the time based on the acquired time information,

wherein the second time correction processing includes calculating the position of the electronic device based on satellite orbit information and the received satellite signal, and correcting the time based on the calculated position, and

wherein the selection of either of the first time correction processing or the second time correction processing is based on manual operation.

2. An electronic device as recited in claim 1, further comprising:

a memory that stores position information and time difference information corresponding to the calculated position;

wherein the second time correction processing further includes accessing the memory to acquire time difference information corresponding to the calculated position, and the correcting of the time is further based on the acquired time difference information.

3. An electronic device as recited in claim 1, wherein the electronic device is a wristwatch.

4. An electronic device as recited in claim 1, wherein the electronic device is a wristwatch that has a crown or a button for the manual operation.