Electronic Timepiece and Control Method for an Electronic Timepiece

• US 20150138928A1
• Filed: 12/23/2014
• Published: 05/21/2015
• Est. Priority Date: 01/16/2008
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Fujisawa, Teruhiko
• Granted Patent: US 9,213,319 B2
• Time in Patent Office: Days
• 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

A control method is provided for an electronic device that has a receiver to receive a satellite signal, and a time display unit to display time. The method includes selecting, by manual operation using a crown or a button, a first time correction processing or a second time correction processing. When the first time correction processing is selected, the control method further includes receiving a satellite signal, acquiring time information based on the received satellite signal, and correcting the displayed time based on the acquired time information. When the second time correction processing is selected, the control method further includes receiving a satellite signal, calculating the position of the electronic device based on satellite orbit information contained in the received satellite signal, and correcting the displayed time based on the calculated position.

Claims

1. A control method for an electronic device that has a receiver configured to receive a satellite signal, and a time display unit configured to display time, the control method comprising:

selecting, by manual operation using a crown or a button, a first time correction processing or a second time correction processing;

when the first time correction processing is selected, the control method further comprises

receiving a satellite signal,

acquiring time information based on the received satellite signal, and

correcting the displayed time based on the acquired time information; and

when the second time correction processing is selected, the control method further comprises

receiving a satellite signal,

calculating the position of the electronic device based on satellite orbit information contained in the received satellite signal, and

correcting the displayed time based on the calculated position.

3. The control method as recited in claim 1, further comprising:

storing 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 displayed time is further based on the acquired time difference information.

8. The control method as recited in claim 1, further comprising:

determining, before the step of receiving a satellite signal, if a power supply voltage is greater than a specific voltage;

wherein, if it is determined that the power supply voltage is less than or equal to the specific voltage, the step of receiving a satellite signal is not executed.

2. An electronic device, comprising:

a receiver configured to receive a satellite signal;

a time display unit configured to display time; and

a processor configured to selectively instruct execution of a first time correction processing or a second time correction processing using the receiver;

wherein the first time correction processing includes acquiring time information based on the received satellite signal, and correcting the displayed 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 contained in the received satellite signal, and correcting the displayed time based on the calculated position; and

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

4. An electronic device as recited in claim 2, 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 displayed time is further based on the acquired time difference information.

5. An electronic device as recited in claim 2, wherein the electronic device is a wristwatch.

6. The electronic device as recited in claim 2, wherein the electronic device is a wristwatch that has a crown or a button for the manual operation.

7. The electronic device as recited in claim 2, wherein time display unit has a dial and a hand.