Communication device, electronic timepiece, communication method, and recording medium

Patent metadata

Field	Value
Publication number	US-10996636-B2
Application number	US-201815900445-A
Country	US
Kind code	B2
Filing date	Feb 20, 2018
Priority date	Mar 16, 2017
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

The communication device includes a receiver, a counter, an operation member and a processor. The receiver receives an external time from an external device. The counter clocks time. The operation member receives a time correction operation to correct the time clocked by the counter. The processor corrects the time clocked by the counter to the received external time. The processor sets a frequency at which the time correction process is performed after the operation member receives the time correction operation, higher than a frequency at which the time correction process is performed before the operation member receives the time correction operation, until a predetermined time elapses. In the time correction process, when the difference between the time clocked by the counter and the external time received by the receiver is within a predetermined range, the processor corrects the time clocked by the counter to the external time.

First claim

What is claimed is:

1. A communication device comprising:
a receiver that receives, from an external device, (i) an external time and (ii) a time difference between the external time and Coordinated Universal Time;
a counter that clocks time;
an operation member that receives a time correction operation from a user to correct the time clocked by the counter; and
a processor that controls the receiver to receive the external time, and that controls to perform a time correction process to correct the time clocked by the counter to the received external time,
wherein the processor performs processes comprising:
setting a frequency at which the time correction process is performed after the operation member receives the time correction operation to be higher than a frequency at which the time correction process is performed before the operation member receives the time correction operation, until a predetermined time elapses; and
in the time correction process, correcting the time clocked by the counter to the received external time when the difference between the time clocked by the counter and the received external time is within a predetermined range, and

wherein after the time difference received by the receiver changes, as time goes on, the processor decreases the frequency at which the time correction process is performed.

2. The communication device according to claim 1 , wherein:
the operation member receives, as the time correction operation, an operation to correct the time clocked by the counter to a time designated by the user.

3. The communication device according to claim 1 , wherein:
the operation member receives, as the time correction operation, an operation to correct the time clocked by the counter to the received external time.

4. The communication device according to claim 1 , wherein:
the processor detects a voltage of a battery which supplies power to the communication device, and decreases the frequency at which the time correction process is performed as the detected voltage decreases.

5. The communication device according to claim 1 , wherein:
the communication device does not perform a predetermined operation in a sleep state, and
as a period of the sleep state increases, the processor decreases the frequency at which the time correction process is performed.

6. The communication device according to claim 1 , wherein:
as a period in which the time correction process has failed increases, the processor decreases the frequency at which the time correction process is performed.

7. An electronic timepiece comprising:
the communication device according to claim 1 ; and
a display that displays the time clocked by the counter.

8. A communication method comprising:
controlling a receiver to receive, from an external device, (i) an external time and (ii) a time difference between the external time and Coordinated Universal Time;
performing a time correction process to correct time clocked by a counter to the received external time;
setting a frequency at which the time correction process is performed after an operation member receives an operation from a user to correct the time clocked by the counter to be higher than a frequency at which the time correction process is performed before the operation member receives the operation, until a predetermined time elapses; and
in the time correction process, correcting the time clocked by the counter to the received external time when the difference between the time clocked by the counter and the received external time is within a predetermined range.

9. A non-transitory computer-readable recording medium storing a program readable by a computer including a receiver which receives, from an external device, (i) an external time and (ii) a time difference between the external time and Coordinated Universal Time, a counter which clocks time, and an operation member which receives a time correction operation of a user to correct the time clocked by the counter, the program being executable to cause the computer to perform operations comprising:
controlling the receiver to receive the external time;
performing a time correction process to correct the time clocked by the counter to the received external time;
setting a frequency at which the time correction process is performed after the operation member receives the time correction operation to be higher than a frequency at which the time correction process is performed before the operation member receives the time correction operation, until a predetermined time elapses; and
in the time correction process, correcting the time clocked by the counter to the received external time when the difference between the time clocked by the counter and the received external time is within a predetermined range.

Assignees

• Casio Computer Co Ltd

Inventors

• Morohoshi Hiroshi

Classifications

• G04R20/26 Primary

  the radio signal being a near-field communication signal · CPC title

• G04R20/28 Primary

  Tuning or receiving; Circuits therefor · CPC title

• G04C17/0066

  electromagnetically driven, e.g. intermittently (clocks incorporating a stepping motor G04C3/14) · CPC title

• G04C3/14

  incorporating a stepping motor (G04C3/02 - G04C3/12 take precedence {; generating commutating pulses in primary clocks G04C13/0463}) · CPC title