JP6734139B2 - Time adjustment system, electronic device, program and time adjustment method - Google Patents

Description

The present invention relates to a time adjustment system, an electronic device, a program, and a time adjustment method.

When an electronic timepiece communicates with an electronic device such as a smartphone by short-range wireless communication based on a standard such as IEEE 802.15, acquires reference time and time difference information from the electronic device, and corrects the display time of the electronic timepiece. There is.

For example, in Patent Document 1, after the automatic reception of satellite signals is disabled, the positioning mode is set when the satellite signals are re-enabled, and a fixed value is set after the automatic reception is performed in the state where the positioning mode is set. The electronic timepiece which is set to the timekeeping mode when the condition of (1) is satisfied is described.

Patent No. 5772115

In a time adjustment system including an electronic device and an electronic timepiece, the electronic device may transmit the reference time and time difference information acquired from the base station to the electronic timepiece to correct the display time of the electronic timepiece. When the base station with which the electronic device communicates is changed, the electronic device may retransmit the reference time and the time difference information to the electronic timepiece regardless of whether or not the reference time and the time difference information are substantially changed.

In the case of an electronic timepiece that receives a reference time from an electronic device and adjusts the time, the shorter the delay time when transferring data from the electronic device to the electronic timepiece, the better the time adjustment accuracy. Therefore, when the reference time is transmitted from the electronic device to the electronic timepiece, if the communication interval is relatively short and the delay time of data transfer is short, or the communication bit rate is high and the time is set with high accuracy. There is. However, if the reference time is transmitted to the electronic timepiece at a relatively short communication interval every time the base station with which the electronic device communicates is changed, the power consumption of the electronic timepiece on the receiving side increases. On the other hand, if the reference time is transmitted to the electronic timepiece at a relatively long communication interval, the power consumption of the electronic timepiece is reduced, but the delay time of data transfer becomes long and the accuracy of time adjustment deteriorates.

When the base station with which the electronic device communicates is changed, it may be possible to determine whether or not the reference time and time difference information acquired from the base station have been substantially changed. It is necessary to determine the time difference in consideration of the accuracy of the clock circuit thus obtained, and complicated control is required.

The present invention has been made in view of such circumstances, and an object thereof is to provide a time adjustment system, an electronic device, a program, and a time adjustment method capable of adjusting the time with sufficient accuracy while suppressing the power consumption of the electronic timepiece. It is to be.

The invention disclosed in the present application to solve the above-mentioned problems has various aspects, and the outline of representative aspects thereof is as follows.

(1) The time adjustment system includes a receiving unit that receives at least one of a reference time and time difference information regarding a time difference from the reference time, and a display time based on at least one of the reference time and the time difference information. An electronic timepiece that includes a time adjustment unit that adjusts the time difference, a reference time transmission unit that transmits the reference time, and the time difference information is transmitted independently during at least the valid period of the reference time transmitted to the electronic timepiece. The electronic device including the time difference information transmission unit.

(2) In (1), the electronic device further includes a transmitter including the reference time transmitter and the time difference information transmitter, and a communication interval controller that controls a communication interval of the transmitter. The communication interval control unit controls the communication interval when transmitting the reference time to be shorter than the communication interval when transmitting the time difference information alone.

(3) In (1) or (2), the time difference information transmission unit transmits the time difference information regarding the current time difference when the time difference related to the previously transmitted time difference information and the current time difference are different, Correction system

(4) In any one of (1) to (3), the reference time transmitting unit transmits the reference time when the valid period elapses after the reference time is transmitted, and the time is corrected. system.

(5) In any one of (1) to (4), the reference time transmitting unit limits the transmission of the reference time until the valid period elapses after the reference time is transmitted. Correction system.

(6) The time adjustment system according to any one of (1) to (4), wherein the reference time transmitting unit transmits the reference time to the electronic timepiece when the electronic device and the electronic timepiece are connected.

(7) The electronic device includes the reference time transmitting unit that transmits the reference time to the electronic timepiece, and the time difference information regarding the time difference from the reference time, at least during the valid period of the reference time transmitted to the electronic timepiece. And a time difference information transmission unit for transmitting.

(8) A program for causing a computer to function as the electronic device according to (7).

(9) The electronic device transmits the reference time to the electronic timepiece, and the electronic device independently and at least during the valid period of the reference time transmitted to the electronic timepiece, the time difference information regarding the time difference from the reference time alone. To the electronic timepiece, and corrects the display time of the electronic timepiece based on at least one of the reference time and the time difference information.

According to the aspects (1) and (7) to (9) of the present invention, the time adjustment system, the electronic device, the program, and the time adjustment which can adjust the time with sufficient accuracy while suppressing the power consumption of the electronic timepiece to a low level. A method is obtained.

Further, according to the aspect (2) of the present invention, it is possible to reduce the power consumption of the electronic timepiece and improve the accuracy of the display time of the electronic timepiece.

Further, according to the aspect (3) of the present invention, the change in the time difference can be appropriately reflected in the display time of the electronic timepiece.

Further, according to the above aspect (4) of the present invention, the accuracy of the display time of the electronic timepiece can be maintained above a certain level.

Further, according to the above aspect (5) of the present invention, it is possible to minimize the power consumption associated with the correction of the display time of the electronic timepiece.

Further, according to the aspect (6) of the present invention, the display time of the electronic timepiece can be accurately maintained by the user using the communication function of the electronic timepiece and the electronic device.

It is a top view showing an example of the appearance of the electronic timepiece concerning the embodiment of the present invention. It is a figure which shows an example of the physical constitution of the time correction system which concerns on embodiment of this invention. It is a functional block diagram of the time adjustment system which concerns on embodiment of this invention. 6 is a time chart of transmission of reference time and time difference information in the time adjustment system according to the embodiment of the present invention. 6 is a flowchart of setting a communication interval in the time adjustment system according to the embodiment of the present invention. 6 is a flowchart of transmission of reference time and time difference information in the time adjustment system according to the embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing an example of an external appearance of an electronic timepiece 1 according to an embodiment of the present invention. The electronic timepiece 1 according to the present embodiment has the appearance of a so-called analog wristwatch and performs short-range wireless communication with the mobile terminal 30 which is an electronic device. A communication circuit and an antenna for performing short-distance wireless communication are housed inside a case that is an exterior (watch case). The standard of short-range wireless communication is not particularly limited and may be any known standard, but in the present embodiment, BLE (Bluetooth (registered trademark) Low Energy) is used. The electronic timepiece 1 has a crown 2 used for time adjustment of a time hand and use of a function, and a push button 4.

The electronic timepiece 1 has a dial 10 inside a body which is an exterior (watch case). On the dial 10, a connection process display 11 indicating that the electronic timepiece 1 is performing a process of establishing a connection with the mobile terminal 30, and a link loss display indicating that the connection with the mobile terminal 30 has been disconnected. 12, an e-mail reception display 13 that notifies the mobile terminal 30 that an e-mail has been received, and an incoming call display 14 that notifies the mobile terminal 30 that an incoming call has arrived. The electronic timepiece 1 displays each information to the user by pointing any one of the connection processing display 11, the link loss display 12, the electronic mail reception display 13 and the incoming call display 14 by the second hand 22 described later.

The electronic timepiece 1 has a first auxiliary hand 15, and has a 24-hour display 15a that indicates the current time in the 24-hour system by the first auxiliary hand 15. Further, the electronic timepiece 1 has a second auxiliary hand 16, and the second auxiliary hand 16 indicates the remaining charge amount of the secondary battery in four stages of “0” to “3” and the remaining charge indicator 16a. The second auxiliary needle 16 indicates the current day of the week as "Sunday" to "Saturday", and the second auxiliary needle 16 indicates the alarm function setting as "ON" or "OFF". The connection state display 16d indicates "ON" or "OFF" for the connection state by the short distance wireless communication with the mobile terminal 30 by the second auxiliary needle 16. Further, the electronic timepiece 1 has the third auxiliary hand 17, and indicates that the current time display function is set by pointing the "TME" with the third auxiliary hand 17, and the "CHR" with the third auxiliary hand 17. Indicates that the chronograph function is set, the third auxiliary needle 17 indicates “ALM” to indicate that the alarm function is set, and the third auxiliary needle 17 indicates “L- The function setting display 17a indicates that the local time display function is set by pointing to "TM".

The electronic timepiece 1 has a plurality of time hands driven by a motor. Specifically, the electronic timepiece 1 has an hour hand 20, a minute hand 21, and a second hand 22 driven by a stepping motor as time hands. However, the electronic timepiece 1 may have hands other than these hands as time hands. Further, the time hand is an analog display member for indicating some time, and a typical one is a pointer, but as a special one, a rotating disk, a retrograde, etc. may be included in the time hand.

In the electronic timepiece 1, a windshield made of a transparent material such as glass is attached to the body so as to cover the dial 10. Further, on the side opposite to the windshield, a case back is attached to the case. In this specification, hereinafter, the direction in which the windshield of the electronic timepiece 1 is arranged (the front side in the plane of FIG. 1) is called the front side, and the direction in which the back cover is arranged (the back side in the plane of FIG. 1) is called the back side.

The design of the electronic timepiece 1 shown in FIG. 1 is an example. Other than those shown here, for example, the body may be a square shape instead of a round shape, and the presence or absence, the number, and the arrangement of the crown 2 and the push buttons 4 are arbitrary. Further, in the present embodiment, the pointers are the hour hand 20, the minute hand 21, the second hand 22, the first sub needle 15, the second sub needle 16, and the third sub needle 17, which are six in total, but are not limited to this, and various You may add or delete the guideline to display.

FIG. 2 is a diagram showing an example of a physical configuration of the time adjustment system 100 according to the embodiment of the present invention. The electronic timepiece 1 transmits and receives radio waves used for short-range wireless communication with the timepiece antenna 53. The electronic timepiece 1 receives, for example, a radio wave encoded with reference time and time difference information from the mobile terminal 30. The received radio wave is decoded by the clock high frequency circuit 43 and passed to the controller 40. The controller 40 is a microcomputer that controls the overall operation of the electronic timepiece 1, has a clock circuit inside thereof, and has a function of measuring the internal time. The internal time held by the clock circuit is kept accurate by being corrected based on the received reference time and time difference information.

A signal from an input unit (crown 2 and push button 4) that receives an operation from the outside by the user is input to the controller 40. Further, the controller 40 outputs a signal for driving the motor 48 based on the internal time, drives the hands (hour hand 20, minute hand 21, and second hand 22) and displays the time. Further, a signal according to the state of the electronic timepiece 1 and the information received from the mobile terminal 30 is output to the motor 48, and the first auxiliary hand 15, the second auxiliary hand 16 and the third auxiliary hand 17 are driven. The number of motors 48 for driving the hands is not limited to one, and a plurality of motors may be provided according to the number of hands to be operated independently.

The electronic timepiece 1 according to this embodiment includes a solar cell 41. The electric power obtained by the power generation by the solar cell 41 is stored in the secondary battery 42. Electric power is supplied from the secondary battery 42 to the high frequency watch circuit 43 and the controller 40. The switch 45 is a switch that switches ON and OFF of power supply to the clock high-frequency circuit 43, and is controlled by the controller 40. Since the watch high-frequency circuit 43 operating at a high frequency consumes a large amount of power, the controller 40 turns on the switch 45 to operate the watch high-frequency circuit 43 only when transmitting and receiving radio waves, and otherwise turns off the switch 45. , Suppress the generation of power consumption.

The short-distance wireless communication by the electronic timepiece 1 is performed when a request is made by the user through an input means such as the crown 2 or the push button 4, when a predetermined time is reached, or when the valid period of the reference time has elapsed. Alternatively, it may be performed based on the amount of power generated by the solar cell 41 and other information indicating the surrounding environment of the electronic timepiece 1.

The mobile terminal 30 transmits and receives radio waves used for short-range wireless communication with the terminal antenna 38. The mobile terminal 30 encodes, for example, the reference time and the time difference information by the terminal high frequency circuit 37, and transmits the reference time and the time difference information to the electronic timepiece 1. In addition, the mobile terminal 30 is wirelessly connected to an internet line or a telephone line, acquires reference time and time difference information, transmits/receives e-mail, and performs telephone communication. A CPU (Central Processing Unit) 36 controls the operation of the entire mobile terminal 30, has a clock circuit inside, and has a function of measuring an internal time. The clock circuit is appropriately corrected based on the reference time and the time difference information acquired from the Internet line, and accurate timekeeping is maintained.

A signal from the input unit 31 (touch panel) that receives an external operation by the user is input to the CPU 36. Further, a video signal is output from the CPU 36 to the display unit 32 (liquid crystal display). The mobile terminal 30 includes a secondary battery 39, and power is supplied from the secondary battery 39 to the terminal high frequency circuit 37 and the CPU 36.

FIG. 3 is a functional block diagram of the time correction system 100 according to the embodiment of the present invention. The mobile terminal 30 includes an input unit 31, a display unit 32, a terminal control unit 33, a terminal transmitting unit 34, and a terminal receiving unit 35. The input unit 31 receives an operation of the user of the mobile terminal 30 and inputs the input to the terminal control unit 33 of the mobile terminal 30, and is a touch panel in the case of the present embodiment. The display unit 32 displays various information to the user, and is a liquid crystal display in this embodiment.

The terminal control unit 33 includes a CPU and controls the entire mobile terminal 30. The terminal control unit 33 includes a communication interval control unit 33a. The communication interval control unit 33a controls the communication interval by the terminal transmission unit 34, and controls the communication interval when transmitting the reference time to be shorter than the communication interval when transmitting the time difference information alone. Here, the communication interval is an interval for transmitting and receiving a short-distance wireless communication signal between the mobile terminal 30 and the electronic timepiece 1, and is typically several tens of milliseconds to several seconds.

The terminal transmission unit 34 includes a reference time transmission unit 34a and a time difference information transmission unit 34b. The reference time transmitting unit 34a transmits the reference time to the electronic timepiece 1. In the time adjustment system 100 according to the present embodiment, the reference time is Coordinated Universal Time (UTC). However, other than Coordinated Universal Time may be used as the reference time, for example, Greenwich Mean Time may be used. The time difference information transmission unit 34b independently transmits the time difference information regarding the time difference from the reference time during the valid period of the reference time transmitted to the electronic timepiece 1. Here, the time difference information is information indicating a time difference from the reference time, and may be the time difference itself or a time zone number. The terminal receiving unit 35 receives from the electronic timepiece 1 the amount of electric power generated by the solar cell 41 of the electronic timepiece 1 and the like.

The electronic timepiece 1 includes a crown 2, a push button 4, a timepiece control unit 50, a motor 48, a timepiece reception unit 51, and a timepiece transmission unit 52. The timepiece control unit 50 includes a time adjustment unit 50a. The time correction unit 50a corrects the display time based on at least one of the reference time and the time difference information. The time correction unit 50a corrects the internal time of the electronic timepiece 1 and controls the motor 48 based on the internal time to correct the display time.

The clock receiving unit 51 receives at least one of the reference time and the time difference information from the mobile terminal 30. The clock transmission unit 52 transmits the amount of electric power generated by the solar cell 41 and the like.

FIG. 4 is a time chart of transmission of the reference time and the time difference information in the time adjustment system 100 according to the embodiment of the present invention. In the figure, the communication interval for transmitting at least one of the reference time and the time difference information from the portable terminal 30 to the electronic timepiece 1 and the transmission content are shown.

In the example shown in the figure, a case where the short-distance wireless communication connection between the mobile terminal 30 and the electronic timepiece 1 is established at time t1, the user moves between time t3 and time t4, and the time difference is changed. Showing. The mobile terminal 30 transmits the reference time (UTC) and the time difference information (+9 hours to UTC) to the electronic timepiece 1 at the communication interval Δt1 from the time t1. In the figure, an example in which communication is performed four times at the communication interval Δt1 is shown, but the number of times of communication is arbitrary.

After that, at time t2, only the time difference information (+9 hours with respect to UTC) is transmitted. After that, the necessity of transmission of the time difference information is determined at the communication interval Δt2. At time t3 (t3=t2+Δt2), since the time difference related to the time difference information transmitted last time is the same as the current time difference, nothing is transmitted. At time t4 (t4=t3+Δt2), since the time difference related to the time difference information transmitted last time and the current time difference are different, the time difference information (+2 hours with respect to UTC) is newly transmitted. Further, after the valid period T of the reference time has elapsed from the time t1, the reference time (UTC) and the time difference information (+2 hours with respect to UTC) are transmitted at the communication interval Δt1 at the time t5. Here, t5>t1+T.

The time difference information transmission unit 34b of the mobile terminal 30 according to the present embodiment independently transmits the time difference information during the valid period T of the reference time transmitted to the electronic timepiece 1. That is, in the case of the example shown in FIG. 4, if the time t satisfies t1<t<t1+T, the time difference information transmission unit 34b does not transmit the reference time and transmits only the time difference information. During the valid period of the reference time, the deviation of the internal time of the electronic timepiece 1 is mainly due to the change of the time difference, and the accuracy of the internal time can be sufficiently maintained only by correcting the time difference. In correcting the time difference, a delay in data transfer hardly causes an error, and sufficient accuracy can be obtained by transmitting the time difference information at a relatively long communication interval. Therefore, the power consumption of the electronic timepiece 1 is kept low. At the same time, the accuracy of the internal time can be improved.

The communication interval control unit 33a of the mobile terminal 30 according to the present embodiment controls the communication interval Δt1 when transmitting the reference time to be shorter than the communication interval Δt2 when transmitting the time difference information alone. Specifically, the communication interval control unit 33a controls the communication interval Δt1 for transmitting the reference time to be several tens of milliseconds and the communication interval Δt2 for transmitting the time difference information to be several seconds. The power consumption of the electronic timepiece 1 can be reduced by relatively lengthening the communication interval when transmitting the time difference information alone. Further, by relatively shortening the communication interval when transmitting the reference time, the delay in data transfer can be reduced and the accuracy of the display time of the electronic timepiece 1 can be improved.

The time difference information transmission unit 34b of the mobile terminal 30 according to the present embodiment transmits the time difference information regarding the current time difference when the time difference related to the time difference information transmitted last time is different from the current time difference. In the example shown in FIG. 4, at time t3, the time difference related to the time difference information transmitted last time (time difference of +9 hours with respect to UTC, which was transmitted at time t2) and the current time difference (+9 hours with respect to UTC). Since the time difference is the same, the time difference information transmission unit 34b does not transmit the time difference information. On the other hand, the time difference changes from time t3 to time t4, and at time t4, the time difference related to the time difference information transmitted last time (time difference of +9 hours with respect to UTC transmitted at time t2) and the current time difference ( Since the time difference of +2 hours is different from UTC, the time difference information transmission unit 34b transmits the time difference information regarding the current time difference. In this way, when there is no change in the time difference, communication is suppressed to reduce power consumption, and when there is a change in the time difference, the change is appropriately reflected in the display time of the electronic timepiece 1 to improve the accuracy of the internal time. Can be kept high.

The reference time transmission unit 34a of the mobile terminal 30 according to the present embodiment transmits the reference time when the valid period T has elapsed since the reference time was transmitted. In the example illustrated in FIG. 4, the reference time transmitting unit 34a transmits the reference time at time t1, and after the valid period T has elapsed, transmits the reference time again at time t5. The valid period T may be set by the mobile terminal 30 or may be set by the base station that transmits the reference time. The valid period T is longer than the communication interval Δt1 when transmitting the reference time and the communication interval Δt2 when transmitting the time difference information alone, and may be, for example, several days. By transmitting the reference time when the valid period T of the reference time has elapsed, the accuracy of the internal time of the electronic timepiece 1 can be maintained above a certain level.

The reference time transmission unit 34a of the mobile terminal 30 according to the present embodiment limits the transmission of the reference time until the valid period T elapses after the reference time is transmitted. In the example illustrated in FIG. 4, the reference time transmitting unit 34a transmits the reference time at time t1, and the transmission of the reference time is limited until the valid period T elapses. That is, from the time t1 to the time t1+T, the reference time transmission unit 34a limits the transmission of the reference time. The transmission of the reference time is performed at a short communication interval Δt1, and the power consumption of the electronic timepiece 1 that receives it is relatively large. Therefore, by limiting the transmission of the reference time to the necessary minimum, it is possible to minimize the power consumption associated with the correction of the display time of the electronic timepiece 1.

The reference time transmission unit 34a of the mobile terminal 30 according to the present embodiment transmits the reference time to the electronic timepiece 1 when the mobile terminal 30 which is an electronic device and the electronic timepiece 1 are connected. In the example shown in FIG. 4, the short-distance wireless communication connection between the mobile terminal 30 and the electronic timepiece 1 is established at time t1, and the reference time transmitting unit 34a transmits the reference time to the electronic timepiece 1. By transmitting the reference time when the short-distance wireless communication is connected, the display time of the electronic timepiece 1 is kept accurate while the user uses the communication functions of the electronic timepiece 1 and the mobile terminal 30. Further, when setting is made so that the mobile terminal 30 and the electronic timepiece 1 are connected for near field communication at a fixed time, the internal time of the electronic timepiece 1 is periodically corrected based on the reference time, and the electronic timepiece 1 The display time of is kept accurate. By setting the connection of the short-distance wireless communication between the mobile terminal 30 and the electronic timepiece 1 so as to start during charging of the electronic timepiece 1, it is possible to avoid relatively large power consumption due to reception of the reference time.

FIG. 5 is a flowchart of setting communication intervals in the time adjustment system 100 according to the embodiment of the present invention. The mobile terminal 30 determines whether or not the reference time transmitted last time is within the valid period (S1). When the reference time is in the valid period (S1: YES), it is determined whether or not the short-distance wireless communication connection between the mobile terminal 30 and the electronic timepiece 1 is established (S2). When the short-distance wireless communication connection between the mobile terminal 30 and the electronic timepiece 1 is established (S2: YES), the communication interval control unit 33a of the mobile terminal 30 sets the communication interval to be long, such as several seconds (S3). ..

If the short-distance wireless communication connection between the mobile terminal 30 and the electronic timepiece 1 is not established during the valid period of the reference time (S1: YES) (S2: NO), the mobile terminal 30 determines that the electronic timepiece 1 is connected to the electronic timepiece 1. The short-range wireless communication connection is established (S4). After that, the communication interval control unit 33a of the mobile terminal 30 sets the communication interval to be short, for example, several milliseconds (S5).

When it is not during the valid period of the reference time (S1: NO), the communication interval control unit 33a of the mobile terminal 30 sets the communication interval to be short, for example, several milliseconds (S5).

FIG. 6 is a flowchart of transmission of reference time and time difference information in the time adjustment system 100 according to the embodiment of the present invention. The process shown in the figure is performed after the communication interval setting process shown in FIG.

The mobile terminal 30 determines whether or not the communication interval is set short (S10). When the communication interval is not set to be short (S10: NO), it is determined whether the time difference related to the time difference information transmitted last time is different from the current time difference (S11). When the time difference is changed (S11: YES), the time difference information transmission unit 34b of the mobile terminal 30 transmits the time difference information alone to the electronic timepiece 1 at long communication intervals (S12).

If the communication interval is not set to be short (S10: NO), and the time difference related to the time difference information transmitted last time is the same as the current time difference (S11: NO), the portable terminal 30 is set to the electronic timepiece 1. Does not send anything. On the other hand, when the communication interval is set to be short (S10: YES), the reference time transmitting unit 34a and the time difference information transmitting unit 34b of the mobile terminal 30 set the reference time and the time difference information to the electronic timepiece 1, respectively, to be short. It transmits at the communication interval (S13).

Although the embodiment of the present invention has been described above, the specific configuration shown in this embodiment is shown as an example, and the technical scope of the present invention is not intended to be limited thereto. For example, in the above-described embodiment, an example in which the reference time is transmitted at a short communication interval when the short-distance wireless communication between the mobile terminal 30 and the electronic timepiece 1 is shown, but the mobile terminal 30 includes the mobile terminal 30 and the electronic timepiece. If the predetermined time has not elapsed with reference to the time when the reference time was transmitted last time when the short-distance wireless communication of No. 1 was connected, the transmission of the reference time may be restricted.

1 electronic clock, 2 crown, 4 push button, 10 dial, 11 connection processing display, 12 link loss display, 13 electronic mail reception display, 14 telephone incoming display, 15 first auxiliary hand, 15a 24 hour display, 16 second Secondary hand, 16a Remaining charge display, 16b Day of the week display, 16c Alarm setting display, 16d Connection status display, 17 Third auxiliary needle, 17a Function setting display, 20 hour hand, 21 minute hand, 22 second hand, 30 mobile terminal, 31 input section , 32 display unit, 33 terminal control unit, 33a communication interval control unit, 34 terminal transmission unit, 34a reference time transmission unit, 34b time difference information transmission unit, 35 terminal reception unit, 36 CPU, 37 terminal high frequency circuit, 38 terminal antenna, 39 secondary battery, 40 controller, 41 solar battery, 42 secondary battery, 43 clock high frequency circuit, 45 switch, 48 motor, 50 clock control unit, 50a time correction unit, 51 clock receiving unit, 52 clock transmitting unit, 53 clock antenna.

Claims (9)

A receiving unit that receives at least one of time difference information regarding a reference time and a time difference from the reference time;
Based on at least one of the reference time and the time difference information, a time adjustment unit for adjusting the display time, an electronic timepiece,
A reference time transmission unit for transmitting the reference time,
At least during the valid period of the reference time transmitted to the electronic timepiece, a time difference information transmission unit that independently transmits the time difference information, and an electronic device,
A time correction system having. The electronic device is
A transmitter including the reference time transmitter and the time difference information transmitter,
A communication interval control unit for controlling the communication interval by the transmission unit,
The communication interval control unit controls the communication interval when transmitting the reference time to be shorter than the communication interval when transmitting the time difference information alone,
The time adjustment system according to claim 1. The time difference information transmitting unit transmits the time difference information related to the current time difference when the time difference related to the previously transmitted time difference information and the current time difference are different,
The time adjustment system according to claim 1. The reference time transmitting unit transmits the reference time when the valid period has elapsed after transmitting the reference time,
The time adjustment system according to any one of claims 1 to 3. The reference time transmission unit limits the transmission of the reference time until the valid period elapses after the reference time is transmitted,
The time adjustment system according to any one of claims 1 to 4. The reference time transmitting unit transmits the reference time to the electronic timepiece when the electronic device is connected to the electronic timepiece,
The time adjustment system according to any one of claims 1 to 4. A reference time transmission unit for transmitting the reference time to the electronic timepiece,
At least during the valid period of the reference time transmitted to the electronic timepiece, by itself, a time difference information transmission unit that transmits time difference information regarding the time difference from the reference time,
An electronic device equipped with. A program for causing a computer to function as the electronic device according to claim 7. The electronic device sends the reference time to the electronic timepiece,
By the electronic device, at least during the valid period of the reference time transmitted to the electronic timepiece, by itself, transmits time difference information regarding the time difference from the reference time to the electronic timepiece,
Correcting the display time of the electronic timepiece based on at least one of the reference time and the time difference information,
Time adjustment method.

Images