JP6047938B2 - Electronic clock, time correction method, and program - Google Patents

Description

  The present invention relates to an electronic timepiece having a function for correcting time, a time correction method, and a program.

  Conventionally, the current time that is counted and displayed in a mobile device that is not wiredly connected during normal use, such as an electronic wristwatch or a mobile phone, has been corrected by obtaining accurate time information from the outside using various wireless communication means. . For example, in mobile phones and smartphones, time data is updated as needed or at predetermined intervals using time information included in control data transmitted from a mobile base station. On the other hand, in recent years, there are electronic wristwatches that update time data by acquiring time information from these mobile phones and smartphones using a short-range communication function such as Bluetooth (registered trademark: Bluetooth).

  In recent years, a version 4.0 protocol suitable for continuous communication connection with low power consumption has been formulated for Bluetooth communication. This version 4.0 rule includes a Time profile as a communication standard related to the exchange of time data. With the service “Current Time” using this Time profile, it is possible to exchange time information with an accuracy of 1/256 seconds. By using Bluetooth communication in such a low power consumption mode (LE mode), the mobile device can acquire time information almost in real time.

  However, conventionally, if current time information is acquired from an external device using Bluetooth communication, accurate time data may not be obtained. As one of such situations, there is a time difference between the time information received and the process of reflecting the received time information in the time data of the electronic wristwatch according to the processing priority in the electronic wristwatch. As a result, the set time may be delayed. Therefore, Patent Document 1 discloses a technique in which a delay time until such transmission data is reflected on an electronic wristwatch is detected by an external device, and transmission of time information is repeated until the delay time becomes a predetermined value or less. Has been.

JP 2009-118403 A

  However, when acquiring time information from an external device such as a mobile phone or a smart phone, another reason that accurate time data cannot be obtained is that the time resolution of the time data itself set in the external device varies. There's a problem. In particular, some external devices do not perform time setting of less than 1 second. Therefore, in such a case, the time data acquired by the electronic wristwatch will eventually be up to 1 second. That is, when acquiring time data from an external device by wireless communication, if the time data obtained from the external device is coarser than the time resolution required by the electronic wristwatch, it is difficult to acquire time data with sufficient accuracy. there were.

  An object of the present invention is to provide an electronic timepiece, a time correction method, and a program capable of efficiently and accurately acquiring time data from an external device using wireless communication.

In order to achieve the above object, the present invention
A time counting means for counting the current time;
A communication means for transmitting / receiving data to / from an external device by wireless communication at a set communication time interval;
Time correcting means for correcting the current time of the time measuring means based on current time data acquired from the external device by the communication means;
With
The time correction means includes
An interval adjusting means for changing the communication time interval to a predetermined value while performing a correction process of the current time of the time measuring means;
The current time data is received by the communication means for each communication time interval changed by the interval adjustment means, and the current time in the external device is based on the received arrangement pattern of the current time and the communication time interval. An update interval identifying means for identifying an update interval of data;
From the update timing of the current time data in the external device to the reception timing of the current time data based on the update interval identified by the update interval identification means, the arrangement pattern of the current time, and the communication time interval Current time acquisition means for identifying the reception time of the current time data that is smaller than a predetermined reference value set based on the accuracy of the current time of the time measuring means, and acquiring the current time data at the reception timing When,
It is an electronic timepiece characterized by comprising.

  According to the present invention, the electronic timepiece, the time correction method, and the program have an effect that it is possible to efficiently and accurately acquire time data from an external device using wireless communication.

It is a figure which shows the structure of the time information acquisition system containing the electronic timepiece of embodiment of this invention. It is a block diagram which shows the internal structure of the electronic timepiece of 1st Embodiment which comprises a time information acquisition system. It is a block diagram which shows the internal structure of the smart phone which comprises a time information acquisition system. It is a sequence diagram which shows the communication procedure performed at the time of time information acquisition between an electronic timepiece and a smart phone. It is a flowchart which shows the control procedure by CPU of the time data update process performed with the electronic timepiece of 1st Embodiment. It is a block diagram which shows the internal structure of the electronic timepiece of 2nd Embodiment. It is a flowchart which shows the control procedure by CPU of the time data update process performed with the electronic timepiece of 2nd Embodiment. It is a figure explaining the acquisition method of the present time in the electronic timepiece of 2nd Embodiment. It is a block diagram which shows the internal structure of the electronic timepiece of 3rd Embodiment. It is a figure explaining the acquisition method of the present time in the electronic timepiece of 3rd Embodiment. It is a flowchart which shows the control procedure by CPU of the time data update process performed with the electronic timepiece of 3rd Embodiment. It is a flowchart which shows the control procedure by CPU of the time data update process performed with the electronic timepiece of other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a diagram showing a configuration of a time information acquisition system including an electronic timepiece according to the first embodiment of the present invention.

  The time information acquisition system 1 includes an electronic timepiece 40 and a smartphone 10 as an external device. The electronic timepiece 40 is a wristwatch including a watch body and a band. The smartphone 10 performs wireless communication with a mobile base station. Both the electronic timepiece 40 and the smartphone 10 have a short-range wireless communication function based on the Bluetooth protocol version 4.0, and can communicate with each other in the low power consumption mode.

  FIG. 2 is a block diagram showing the internal configuration of the electronic timepiece 40. FIG. 3 is a block diagram showing the internal configuration of the smartphone 10.

  As shown in FIG. 2, the electronic timepiece 40 includes a CPU (Central Processing Unit) 41 (time correction means, control means), a ROM (Read Only Memory) 42, a RAM (Random Access Memory) 43, and an operation unit 44. A clock circuit 45 as a clock means, a display unit 46 (display unit) and a driver 47 that controls the display unit 46, a Bluetooth module 48 and a UART (Universal Asynchronous Receiver Transmitter) 49 as a communication unit, and a vibration motor 50 and its driver 51, LED (light emitting diode) 52 and its driver 53, piezo element 54 and its driver 55, and a bus 56 for exchanging signals between the CPU 41 and each part.

  The CPU 41 performs control over the entire operation of the electronic timepiece 40 and various arithmetic processes. The CPU 41 causes the display unit 46 to display the time based on the current time counted by the timer circuit 45. Further, the CPU 41 executes the time data update program 42a, and corrects the time data of the clock circuit 45 based on the time information acquired from the smartphone 10 via the Bluetooth module.

  The ROM 42 stores various programs executed by the CPU 41 and initial setting data used by the programs. The data stored in the ROM 42 includes a time data update program 42a.

  The RAM 43 provides a working memory space to the CPU 41, expands an execution program read from the ROM 42, and stores temporary data.

  The operation unit 44 includes one or a plurality of operation keys, converts the input signal into an input signal based on an operation performed by the user on the operation key, and outputs the input signal to the CPU 11. Alternatively, the operation unit 44 may be a touch panel. Further, the time data update program 42 a can be manually executed through an input operation to the operation unit 44.

  The timer circuit 45 is a counter that counts and holds the current time. Based on the current time data output from the clock circuit 45, the current time is displayed on the display unit 46, or the current time data is compared with set time data (for example, alarm set time) related to various functions. Is performed. The current time held by the clock circuit 45 has a time resolution of 1/256 seconds. The current time data is configured to be rewritable based on time data acquired from an external device by Bluetooth communication or time data manually input by operating the operation unit 44.

  The display unit 46 is, for example, an LCD (Liquid Crystal Display). The driver 47 (liquid crystal driver) operates in response to a control signal sent from the CPU 41, and causes the LCD to display the specified contents such as the current time, the setting state, or a menu of various functions. Alternatively, the display unit 46 may be other display means such as an ELD (Electro-Luminescent Display). Further, the driver 47 is appropriately selected according to the type of the display unit 46.

  The Bluetooth module 48 is a control module for performing Bluetooth communication with an external device via the antenna AN4. The Bluetooth module 48 supports communication in the low power consumption mode of the contract version 4.0, and can transmit and receive data according to the Time profile. The transmission data output from the CPU 41 is subjected to processing such as serial / parallel conversion by the UART 49 and transmitted from the Bluetooth module 48 to the external device. Received data received from the external device using the Bluetooth module 48 is subjected to processing such as serial / parallel conversion by the UART 49 and is input to the CPU 41.

The vibration motor 50, the LED 52, and the piezo element 54 are for notifying the user by emitting vibration, light emission, and buzzer sound, respectively. When a control signal is sent from the CPU 41 to each of the drivers 51, 53, and 55, the drivers 51, 53, and 55 convert the voltage signals necessary for operating the vibration motor 50, the LED 52, and the piezo element 54 and output the voltage signals. .
For example, when the current time acquired from an external device is updated by changing the time zone or the like, a control signal is sent from the CPU 41 to the driver 51, 53, or 55, and the vibration motor 50, the LED 52, or the piezo element 54 is sent. Performs a notification operation.

  As shown in FIG. 3, the smartphone 10 includes a CPU 11, a ROM 12, a RAM 13, a storage unit 14, an operation unit 15, a built-in clock 16, a display unit 17 and its driver 18, a speaker 19, and a microphone 20. A codec 21, an RF transceiver circuit 22, an RF transceiver antenna AN11, a communication circuit 23, a Bluetooth module 24, a UART 25, a near field communication transceiver antenna AN12, a vibration motor 26 and its driver. 27, and a bus 28 for connecting the CPU 11 to other units.

  The CPU 11 performs overall control of the overall operation of the smartphone 10 and various arithmetic processes. The ROM 12 stores various programs executed by the CPU 11 and initial setting data. The RAM 13 provides a working memory space to the CPU 11 and stores temporary data. The storage unit 14 is a non-volatile readable / writable memory. For example, (Electrically Erasable and Programmable Read Only Memory) is used. The storage unit 14 stores, for example, mail data transmitted / received by a smartphone, various application programs, and application data.

  The operation unit 15 includes a plurality of operation keys, converts them into electrical signals based on operations performed by the user on the operation keys, and outputs them to the CPU 11 as input signals. Alternatively, the operation unit 15 may include a touch panel and a touch panel operation input detection unit.

  The built-in clock 16 is a counter that counts and holds the current time. In the smartphone 10, the current time is read and displayed on the display unit 17. The current time data of the built-in clock 16 is corrected at any time or at a predetermined timing when communicating with the mobile base station by the RF transceiver circuit 22.

  The display unit 17 is, for example, an LCD (Liquid Crystal Display). A driver 18 (liquid crystal driver) is operated by a control signal sent from the CPU 11 to cause the LCD to display various functions of the smartphone 10. The display unit 17 may be other display means, for example, an organic ELD (Electro-Luminescent Display). Further, the driver 18 is appropriately selected according to the type of the display unit 17.

  The speaker 19 converts an electrical signal into an audio signal based on a signal from the codec 21 and outputs audio. The microphone 20 detects sound waves, converts them into electric signals, and outputs them to the codec 21. The codec 21 decodes the input digital signal for audio output and sends it as an analog signal to the speaker 19, and encodes the audio signal acquired from the microphone 20 and outputs it to the CPU 11 and the communication circuit 23.

  The RF transmission / reception circuit 22 performs transmission / reception processing of communication performed with the mobile base station using the RF transmission / reception antenna AN11. The communication circuit 23 performs various processes of transmission / reception data transmitted / received by the RF transmission / reception circuit 22, and exchanges data with the CPU 11 and the codec 21.

  The Bluetooth module 24 is a control module for performing Bluetooth communication with an external device such as the electronic timepiece 40 via the antenna AN12. The Bluetooth module 24 supports communication in the low power consumption mode of the contract version 4.0, and can transmit and receive data according to the Time profile. The transmission data output from the CPU 11 is subjected to processing such as serial / parallel conversion by the UART 25 and is transmitted from the Bluetooth module 24 to the external device. Also, received data received from the external device using the Bluetooth module 24 is subjected to processing such as parallel / serial conversion by the UART 25 and is input to the CPU 11.

  The vibration motor 26 generates vibration by the operation of the motor driven by the driver 27 when a telephone call or e-mail is received.

  Next, the time information acquisition operation of the electronic timepiece 40 will be described.

  In the electronic timepiece 40 of the present embodiment, the current time data is acquired from the smartphone 10 by the low power consumption communication according to the Bluetooth communication protocol version 4.0 with the smartphone 10, and the correction is performed based on the current time data. Done.

  FIG. 4 is a sequence diagram illustrating a communication operation between the electronic timepiece 40 and the smartphone 10.

  In the time information acquisition operation by the electronic timepiece 40 of the present embodiment, the communication connection interval (communication time interval) that is normally set between the electronic timepiece 40 and the smartphone 10 is shortened, and a plurality of times in a short time. Data reception (for example, 10 times per second) is enabled. First, in communication at a normal connection interval (for example, 2000 ms), the electronic timepiece 40 transmits a connection state update request “LL_CONNECTION_UPDATE_REQ” as communication data to the smartphone 10 together with an argument including the connection interval setting value “connInterval”. The connection interval can be changed in steps of 1.25 ms within a range of 7.5 ms to 4000 ms. In the smartphone 10, the connection interval setting is changed based on the received connection state update request, and a response indicating normal reception of the data is made, and the connection interval is changed.

  When the connection interval is changed, the electronic timepiece 40 subsequently transmits an acquisition request for an index (Characteristic) “Current Time” indicating the current time to the smartphone 10 continuously for each connection interval. Upon receiving this time data acquisition request, the smartphone 10 calls a process (subprocedure) “GATT Read Characteristic Value” in the internal processing of the smartphone 10 to acquire and set each attribute value of the index “Current Time” To do. The time resolution (update interval) of the acquired time data varies depending on the smartphone 10.

  The indicator “Current Time” includes two indicators “Exact Time 256” and “Adjust_Reason”. Furthermore, the index “Exact Time 256” includes two indexes “Day Date Time” and “Fraction 256”. The indicator “Day Date Time” includes information on the current date, month, day, hour, minute, second, and day of the week. Also, the index “Fraction 256” indicates a time of less than 1 second as a value in units of 1/256 seconds, that is, 8-bit data, that is, a decimal value of 0 to 255. When the smartphone 10 does not support setting of a value in units of 1/256 seconds, the value “0x00 (decimal number 0)” is always set in this index “Fraction 256”.

  The smartphone 10 transmits each attribute value of the set index “Current Time” to the electronic timepiece 40 as communication data.

  The electronic timepiece 40 repeats the data request for the index “Current Time” at the set connection interval until a predetermined condition described later is satisfied. When the predetermined condition is satisfied, the data request for the index “Current Time” is terminated, and the connection interval is returned to the original value (for example, once every 2 seconds). That is, the electronic timepiece 40 transmits a connection state update request “LL_CONNECTION_UPDATE_REQ” to the smartphone 10 together with an argument including the connection interval setting value “connInterval”.

  Upon receiving the connection interval change request by the connection state update request “LL_CONNECTION_UPDATE_REQ”, the smartphone 10 updates the connection interval setting, returns normal reception data to the electronic timepiece 40, and changes subsequent connection intervals. .

  FIG. 5 is a flowchart showing a control procedure by the CPU 41 of time data update processing executed in the electronic timepiece 40 of the first embodiment.

  This time data update process is performed by calling and starting the time data update program 42a. The time data update program 42a is automatically activated at a predetermined timing, for example, once a day at a predetermined time, activated by a user's input operation to the operation unit 44, or connected to the smartphone 10 for communication. Time change notification received from the smartphone 10 when a time change process such as time zone movement or daylight saving time start / end is performed on the smartphone 10. Or based on.

  When the time data update process is activated, the CPU 41 first causes the Bluetooth module 48 to transmit a connection interval shortening request (change request) in Bluetooth communication connected to the smartphone 10. That is, the CPU 41 transmits an argument including the connection state update request “LL_CONNECTION_UPDATE_REQ” and the connection interval setting value “connInterval” to the smartphone 10 as communication data (step S11).

  The CPU 41 waits until the Bluetooth module 48 receives a signal from the smartphone 10 and confirms a signal indicating that the connection state update request has been normally received (step S12).

  When the connection status update request is normally received and the connection interval of communication with the smartphone 10 is shortened, the CPU 41 then sends a request for acquiring the attribute value of the index “Current Time” to the Bluetooth module 48. (Step S13).

  In response to the above process, when the Bluetooth module 48 receives the attribute value of the index “Current Time” from the smartphone 10, the CPU 41 acquires time data and stores it in the RAM 43 (step S14).

  Subsequently, for each connection interval with the smartphone 10 whose setting has been changed in the process of step S <b> 11, the CPU 41 sends a request for acquiring the attribute value of the index “Current Time” for the second time or later to the smartphone 10. Transmit (step S15). Then, when the Bluetooth module 48 receives the attribute value of the index “Current Time” from the smartphone 10, the CPU 41 detects time data in units of 1/256 seconds from the attribute value related to the index “Exact Time 256” of the received data. Is acquired and stored in the RAM 43 (step S16).

CPU41 discriminate | determines whether the value below the second of the time data acquired by the process of step S16 has not changed from the value below the second of the time data acquired once before stored in RAM43. Step S17). If it is determined that there is no change between the value less than the second of the previous time data and the value less than the second of the current time data, the process of the CPU 41 returns to step S15 and returns to the previous time. After the connection interval elapses from the data acquisition request, the following processing is performed.
In the time data update process according to the present embodiment, when time data after the third time is acquired, time data two or more times before the time data becomes unnecessary, and the data may be deleted.

When it is determined in the determination process of step S17 that the value less than the second of the time data acquired in the latest process of step S16 has changed from the value less than the second of the time data acquired once before The CPU 41 updates the time data of the clock circuit 45 with the latest time data (step S18). Then, the CPU 41 causes the Bluetooth module 48 to transmit a request for returning the connection interval to the original time to the smartphone 10 (step S19). And CPU41 confirms that the signal which shows the normal reception of the said request | requirement from the smart phone 10 was received (step S20), and complete | finishes a time data update process.
Here, the CPU 41, the process of step S11, and the process of step S19 constitute an interval adjusting means. Further, in the electronic timepiece 41 of the first embodiment, the current time acquisition unit is configured by the CPU 41 and the processes of steps S15 to S18.

  As described above, in the time data update process executed by the electronic timepiece 40 according to the first embodiment, the connection interval with the smartphone 10 by Bluetooth communication is shortened to repeatedly acquire time data, and the timing at which the value of the second or less changes is changed. By detecting, time data can be acquired with the same accuracy as the shortened connection interval. That is, by setting the connection interval to 100 ms, time data can be acquired with an accuracy of 100 ms regardless of the update interval of the setting of the index “Current Time” in the smartphone 10.

[Second Embodiment]
Next, an electronic timepiece 40b according to a second embodiment of the present invention will be described.

FIG. 6 is a block diagram showing an internal configuration of the electronic timepiece 40b of the second embodiment.
The electronic timepiece 40b of the second embodiment has the same configuration as the electronic timepiece 40 of the first embodiment except that the contents of the time data update program 42b stored in the ROM 42 are different from the contents of the time data update program 42a. Yes, the same reference numerals are given and the description is omitted.

  Next, time data update processing executed in the electronic timepiece 40b of the second embodiment will be described.

  FIG. 7 is a flowchart showing a control procedure by the CPU 41 in time data update processing executed by the electronic timepiece 40b of the second embodiment.

  In the time data update process in the electronic timepiece 40b of the second embodiment, the process in step S14 of the time data update process in the electronic timepiece 40 in the first embodiment is changed to the process in step S14a, and the determination process in step S17. Instead, the determination process of step S17a is executed, and further, the processes of steps S21 and S22 are added after the determination process of step S17a and before the process of step S18. The other processes are the same as the time data update process in the electronic timepiece 40 of the first embodiment, and the same reference numerals are given and the description thereof is omitted.

  In the time data update process in the electronic timepiece 40b of the second embodiment, when the connection interval with the smartphone 10 is shortened, the CPU 41 receives the attribute value of the index “Current Time” for the first time in the process of step S14a. When the time data is acquired, the time data is stored in the RAM 43 in association with the local current time counted by the timer circuit 45. The local current time to be stored may be the timing at which the Bluetooth module 48 transmits an acquisition request for the index “Current Time” in step S13, or the timing at which the attribute value data for the index “Current Time” is acquired in step S14a. There may be.

  Next, when the attribute value data of the index “Current Time” for the second and subsequent times is acquired in the processing of steps S15 and S16, the CPU 41 refers to the time counting circuit 45 and stores the first time value stored in the RAM 43 in step S14a. It is determined whether or not a preset time, for example, one second has elapsed from the local current time data to the current local current time (step S17a). If it is determined that the preset time has not yet elapsed, the process of the CPU 41 returns to step S15, and after the connection interval elapses, the CPU 41 acquires the next index “Current Time”.

If it is determined in step S17a that the preset time has elapsed, the process of the CPU 41 proceeds to step S21, and the CPU 41 is acquired within the set time as will be described later. The update interval of the current time data in the smartphone 10 is identified based on the arrangement of the time data. Then, the CPU 41 calculates the current time based on the update interval, connection interval, and time data array (step S22). The CPU 41 updates the current time data of the clock circuit 45 with the calculated current time (step S18).
Here, in the electronic timepiece 41b of the second embodiment, an update interval identifying unit is configured by the CPU 41 and the process of step S21, and a current time acquisition unit is configured by the process of the CPU 41 and step S22.

  Here, the contents of the processing in step S21 and step S22 will be described.

  FIG. 8 is a diagram for explaining the contents of processing for acquiring the current time with high accuracy in the electronic timepiece 40b of the second embodiment.

First, 11 pieces of data (1/256 second value) less than the second set in the index “Fraction 256” from the time data acquired in one second are arranged. These 1/256 second values are unsigned integers between 0 and 255. And in the electronic timepiece 40b of this embodiment, the update interval of the time data in the smart phone 10 is identified based on the sequence pattern of the variation between each data.
In FIG. 8 (a), the timing at which the electronic timepiece 40b acquires the current time data in the first half of 0.5 seconds in the center is shown by vertical lines, and the timing at which the current time data can be updated on the smartphone 10 is shown. This is indicated by the symbol “x”. Further, in the upper part, examples of the second value, 1/256 second value of the timing when the current time data is acquired by the electronic clock 40b, and 1/256 second value actually acquired from the smartphone 10 by the electronic clock 40b are shown. Show. The value indicated in parentheses indicates the amount of change in 1/256 second value between adjacent current time acquisition timings. Also, the lower part shows a value of 1/256 second that can be updated by the smartphone 10 at the timing indicated by each symbol “x”.
As shown in FIG. 8A, for example, when the array of 1/256 second values acquired at 100 msec intervals is “0, 16, 48, 64, 96, 128”, adjacent 1/256 seconds. The amount of change between the values is 16 or 32, and the update interval of the time data in the smartphone 10 is either a divisor of 16 that is a 1/256 second value and is the greatest common divisor of these values. I understand that. In addition, when time data updated at intervals of 8/256 = 1/32 seconds are acquired at intervals of 0.1 seconds, there is always a period in which the amount of change between adjacent 1 / 256-second values is 16. The time data update interval in the smartphone 10 is identified as 16/256 = 1/16 second interval.

  The above-described identification can be performed assuming that the update interval in the smartphone 10 is basically set to 1 Hz or a frequency that is an integer multiple of 2 or 10.

  Next, the data update interval of 1/16 second and the data acquisition interval of 1/10 second coincide with each other with a 500 ms period. That is, the change amount of 1/256 second value data in one cycle of 500 ms is repeated as “16, 32, 16, 32, 32”.

  Here, FIG. 8B shows an example in which the time acquisition timing of the electronic timepiece 40b in FIG. 8A and the time update timing of the smartphone 10 are shifted by about 0.0125 seconds. In the upper part of FIG. 8 (b), a 1/256 second value (b1) obtained when the magnitude of the deviation is less than 0.0125 seconds and obtained when the magnitude of the deviation is 0.0125 seconds or more. 1/256 second value (b2) is shown.

As shown in FIGS. 8A and 8B, the data acquisition timing (timing of 0.4 seconds and 0.5 seconds in FIG. 8A) of the interval “32” acquired twice in succession. Of these, the second data acquisition timing is limited to a delay of less than 0.0125 seconds (3.2 / 256 seconds) from the immediately preceding time update timing. Accordingly, by correcting the current time based on the time data acquired at the data acquisition timing of the second interval “32”, the update interval of the index “Current Time” in the smartphone 10, and the electronic timepiece 40 b and the smartphone The time data can be acquired with much better accuracy than the connection interval between the two.
When the synchronization between the time update timing and the time acquisition timing shifts by 0.0125 seconds or more, the data acquisition timing of the interval “32” acquired twice consecutively moves (1/256 seconds in FIG. 8B). In the acquired value (b2), the timing of 0.2125 seconds and 0.3125 seconds) does not change the above property, so the delay of the acquired current time can still be limited to less than 0.0125 seconds. . Here, by adding half the maximum delay time (0.00625 seconds) to the acquired current time, the delay time can be in the range of ± 0.00625 seconds.

  As described above, according to the electronic timepiece 40b of the second embodiment, the time data in the smartphone 10 is updated based on the array of changes in the time data acquired from the smartphone 10 by Bluetooth communication for each set connection interval. The interval is identified, and the time data acquired immediately after the update timing in the smartphone 10 based on the identified update interval, the connection interval, and the array pattern of the change amount of the time data is acquired and counted by the timing circuit 45 Since the current time is corrected, the time data can be acquired with a good time resolution equal to or less than the update interval of the smartphone 10 and the connection interval between the smartphone 10 and the electronic timepiece 40b.

  In addition, as described above, the processing for identifying the update interval and the acquisition timing of the current time based on the array pattern of the time change amount requires a large amount of calculation depending on the array pattern. It can be stored and identified by referring to this table data.

  In the above embodiment, when the update interval is wider than the connection interval, the longest time resolution equivalent to the connection interval can be obtained, but the time resolution required for the electronic timepiece 40b is smaller than the connection interval. In the case where there is no timing at which the current time less than the delay time corresponding to the required time resolution less than the connection interval can be obtained, such as when the update interval is a multiple of the connection interval, the following third embodiment As shown in FIG. 5, the connection interval may be reset to obtain the necessary time resolution.

  In addition, the update interval data once specified for one smartphone 10 is stored in the RAM 43 in association with the identification information of the smartphone 10, so that the update interval can be obtained at the time of acquiring time information from the next time onward. An optimal connection interval can be set based on the data, or the acquisition timing of the current time can be directly determined.

[Third Embodiment]
Next, an electronic timepiece 40c according to a third embodiment will be described.
FIG. 9 is a block diagram illustrating an internal configuration of an electronic timepiece 40c according to the third embodiment.

  The electronic timepiece 40c according to the third embodiment is the same as the electronic timepiece 40 according to the first embodiment except that the time data update program 42c is different.

  Next, time data update processing by the electronic timepiece 40c of the third embodiment will be described.

  FIG. 10 is a diagram for explaining the contents of the time data update process by the electronic timepiece 40c of the third embodiment. In time series, vertical data (g1) to (g6) indicate time data acquisition timing by the electronic timepiece 40c, and symbol “x” indicates two time data update timings by the smartphone 10.

  Similar to the electronic timepiece 40b of the second embodiment described above, when the update interval of the index “Current Time” in the smartphone 10 is identified, as shown in FIG. The previous acquisition is performed once at a number determined by the ratio between the update interval and the connection interval by resetting a slightly longer connection interval or a connection interval slightly shorter than the update interval as shown in FIG. The time when the amount of change in time is double the amount of change in other times (timing (g5) in FIG. 10A), or the time when the acquired time is not different from the previous acquisition time (FIG. 10B) (G6)) appears. In any of these cases, the current time acquired at the timing (g5) minimizes the delay time from the time updated at the update timing of the index “Current Time” in the smartphone 10. Therefore, by correcting the current time counted by the clock circuit 45 based on the current time data acquired at this timing (g5), it is possible to acquire time data that is much more accurate than the set interval and connection interval. .

  FIG. 11 is a flowchart showing a control procedure executed by the CPU 41 in the time data update process in the electronic timepiece 40c of the third embodiment.

  In the time data update process of the third embodiment, the processes of steps S32 to S39 are performed instead of the process of step S22 in the time data update process of the second embodiment. The other processes are the same as the processes in the time data update process of the second embodiment, and the same reference numerals are assigned to omit the description.

  When the update interval of the index “Current Time” in the smartphone 10 is calculated in the process of step S21, the CPU 41 then sets a connection interval slightly longer than the calculated update interval (step S32). For example, the CPU 41 adds a predetermined time according to the desired time accuracy to the update interval, and sets the connection interval to the closest value that can be set by the connection state setting value “connInterval”.

  Then, the CPU 41 causes the Bluetooth module 48 to transmit a connection interval change request in Bluetooth communication connected to the smartphone 10. That is, the CPU 41 causes the smartphone 10 to transmit an argument including the connection state update request “LL_CONNECTION_UPDATE_REQ” and the set connection interval setting value “connInterval” as communication data (step S33).

  The CPU 41 waits until the Bluetooth module 48 receives a signal from the smartphone 10 and confirms a signal indicating that the connection state update request has been normally received (step S34).

  CPU41 makes the Bluetooth module 48 transmit the request | requirement which acquires the attribute value of parameter | index "Current Time" with respect to the smart phone 10 for every connection space | interval with the smart phone 10 whose setting was changed by the process of step S33 (step S35). Then, when the Bluetooth module 48 receives the attribute value of the index “Current Time” from the smartphone 10, the CPU 41 detects time data in units of 1/256 seconds from the attribute value related to the index “Exact Time 256” of the received data. Is acquired and stored in the RAM 43 (step S36).

  Subsequently, for each connection interval, the CPU 41 causes the Bluetooth module 48 to transmit a request for acquiring the attribute value of the index “Current Time” for the second and subsequent times to the smartphone 10 (step S37). Then, when the Bluetooth module 48 receives the attribute value of the index “Current Time” from the smartphone 10, the CPU 41 detects time data in units of 1/256 seconds from the attribute value related to the index “Exact Time 256” of the received data. Is acquired and stored in the RAM 43 (step S38).

  CPU41 discriminate | determines whether the variation | change_quantity of the value below the second of the time data acquired by the last two times is equal to the normal variation | change_quantity corresponding to the update interval of the parameter | index "Current Time" calculated by step S21. (Step S39). If it is determined that the amount of change is equal to the normal change amount, the process of the CPU 41 returns to step S37 and causes the next process to be performed after the connection interval has elapsed from the previous time data acquisition request.

On the other hand, if it is determined in the determination process in step S39 that the change amount of the second or less value is not equal to the normal change amount, the CPU 41 counts time based on the time data acquired in the latest process in step S38. The current time data of the circuit 45 is updated (step S18).
In the electronic timepiece 40c of the third embodiment, a current time acquisition unit is configured by the CPU 41 and the processes of steps S37 to S39 and S18.

  If the update interval of the index “Current Time” calculated in the process of step S21 already satisfies the time accuracy required by the electronic timepiece 40c, the process of steps S32 to S39 is omitted and the most recent step is performed. The current time data of the time measuring circuit 45 may be updated immediately based on the current time data acquired in the processes of S15 and S16.

  If the connection interval at the time of resetting is, for example, half of the connection interval at the time of resetting, the time data is updated twice in succession while the received current time data is updated every other time. If it is, the delay time related to the current time received for the second time is the shortest. Therefore, the current time data can be acquired in half the time required for the time data update process. As described above, even if the connection interval at the time of resetting is set to another appropriate value, the current time with a small delay time is obtained based on the received current time arrangement pattern in the same manner as the time data update process of the second embodiment. It can be acquired.

  As described above, in the time data update process executed by the electronic timepiece 40c according to the third embodiment of the present invention, first, the update interval of the time data in the smartphone 10 is identified and slightly shorter than the identified update interval. Alternatively, by resetting a long connection interval, the current time can be acquired with an accuracy corresponding to the width of the extended or reduced connection interval.

  In addition, since the arrangement of changes in the current time acquired after resetting the connection interval is simplified, the load on the CPU 41 can be reduced.

  Further, according to the first to third embodiments of the present invention, in the time information acquisition operation by the electronic timepiece (40, 40b, 40c), the electronic timepiece (40, 40b, 40c), the smartphone 10, The communication connection interval (communication time interval) that is normally set in between is shortened to enable data reception multiple times (for example, 10 times per second) in a short time. However, some smartphones 10 may not support a connection interval reduction request (change request) from the electronic timepiece (40, 40b, 40c). That is, a smartphone 10 that cannot change the connection interval so as to be shorter than the communication connection interval that is normally set is also conceivable. In this case, if the normal connection interval is 2000 ms, for example, when time data is acquired from the smartphone 10, an error of 2000 ms at maximum may occur.

  The case where the connection space | interval of the electronic timepiece (40, 40b, 40c) and the smart phone 10 cannot be changed as other embodiment is demonstrated. FIG. 12 is a flowchart showing a control procedure by the CPU 41 of time data update processing executed in the electronic timepiece (40, 40b, 40c). This time data update process differs from the first to third embodiments described above only in the contents of the time data update program stored in the ROM 42. The time data update program is automatically activated at a predetermined timing, for example, once a day at a predetermined time, activated by a user input operation to the operation unit 44, or connected to the smartphone 10 for communication. Based on the time change notification received from the smartphone 10 when it is established as part of the initial setting when it is established, or when time change processing such as time zone movement or daylight saving time start / end is performed on the smartphone 10 Or is activated.

  When the time data update process is activated, the CPU 41 first transmits a connection interval shortening request (change request) in Bluetooth communication connected to the smartphone 10 to the smartphone 10 (step S41). The CPU 41 receives a signal from the smartphone 10 and determines whether or not the connection interval can be changed (step S42, connection interval determination means). If it is determined in step S42 that the connection interval can be changed (YES in step S42), the process proceeds to step S12 in the first to third embodiments, and the processes after step S13 are performed. If it is determined in step S42 that the connection interval cannot be changed (NO in step S42), the process proceeds to step S43. And CPU41 confirms having received the signal which shows that the connection space | interval cannot be changed from the smart phone 10 (step S43). Next, CPU41 transmits the request | requirement which acquires parameter | index "Current Time" with respect to the smart phone 10 (step S44). When the index “Current Time” is received, the CPU 41 acquires time data and stores it in the RAM 43 (step S45). Then, the CPU 41 determines whether or not the connection interval is a predetermined interval or more (for example, 1000 ms or more) (step S46, determination means). If the connection interval is equal to or greater than the predetermined interval (YES in step S46), the CPU 41 updates the time data of the time measuring circuit 45 with the latest time data (step S47), displays the time on the display unit 46, and In order to indicate that there is an error in the time data acquired from the smartphone 10, contents (such as a mark) indicating the meaning of “the time data has an error” are displayed (step S48). If the connection interval is less than the predetermined interval (NO in step S46), the CPU 41 updates the time data of the clock circuit 45 with the latest time data (step S49), and causes the display unit 46 to display the time (step S50). . Here, the CPU 41, the process of step S47, and the process of step S49 constitute a time acquisition unit.

As described above, in the time data update process executed by the electronic timepiece (40, 40b, 40c) according to another embodiment of the present invention, if the connection interval is a predetermined interval or more (for example, 1000 ms or more), the smartphone 10 is displayed on the display unit 46 of the electronic timepiece (40, 40b, 40c) to indicate that there is an error in the time data acquired from 10 and contents indicating the meaning of “the time data has an error” ) Is displayed. Therefore, let the user recognize that there is an error in the time data displayed on the electronic timepiece (40, 40b, 40c), that is, the time data of the clock circuit 45 updated with the time data acquired from the smartphone 10. Can do.
Furthermore, if the connection interval is equal to or greater than the predetermined interval in the process of step S45 (YES in step S46), the time interval acquired from the smartphone 10 is forcibly added to the time data acquired in step S47 to reduce the error. You may make it update the time data of the time measuring circuit 45 by adding a half value. For example, the error can be reduced by adding 1000 ms when the connection interval is 2000 ms and adding 500 ms when the connection interval is 1000 ms.

The present invention is not limited to the above-described embodiment, and various modifications can be made.
For example, in the above embodiment, the electronic wristwatch has been described as an example, but the present invention is not limited to this. For example, it may be a pocket watch, a wall clock or a table clock. Further, the present invention is not limited to an electronic timepiece whose main purpose is a function as a timepiece, and can be applied to electronic timepiece functions such as an electronic pedometer and a blood pressure monitor. Further, although the smartphone has been described as an example of the external device, other portable electronic devices such as a notebook PC and a PDA (Portable Digital Assistant) may be used. Alternatively, it may be used when correcting the time by making Bluetooth communication between a wall clock or table clock and a desktop PC.

  In the above-described embodiment, Bluetooth communication protocol version 4.0 has been described as an example. However, other short-range wireless communication in which data communication is performed at a predetermined time interval may be used.

Moreover, although the example which uses ROM42 as a computer-readable medium of the program based on this invention was disclosed in the said embodiment, it is not limited to this example. As other computer-readable media, flash memory, nonvolatile memory such as EEPROM, and portable recording media such as CD-ROM can be applied. A carrier wave is also applied to the present invention as a medium for providing program data according to the present invention via a communication line.
In addition, details, numerical values, control procedures, and the like of the specific configuration shown in the above embodiment can be changed as appropriate without departing from the spirit of the present invention.

Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.

[Appendix]
<Claim 1>
A time counting means for counting the current time;
A communication means for transmitting / receiving data to / from an external device by wireless communication at a set communication time interval;
Time correcting means for correcting the current time of the time measuring means based on current time data acquired from the external device by the communication means;
With
The time correction means includes
While performing the correction process of the current time of the time measuring means, the interval adjusting means for changing the communication time interval to a value according to the accuracy of the current time of the time measuring means;
The current time data is received by the communication means for each communication time interval changed by the interval adjustment means, and the current time in the external device is based on the received arrangement pattern of the current time and the communication time interval. An update interval identifying means for identifying an update interval of data;
From the update timing of the current time data in the external device to the reception timing of the current time data based on the update interval identified by the update interval identification means, the arrangement pattern of the current time, and the communication time interval Current time acquisition means for identifying the reception time of the current time data that is smaller than a predetermined reference value set based on the accuracy of the current time of the time measuring means, and acquiring the current time data at the reception timing When,
An electronic timepiece characterized by comprising:
<Claim 2>
When the update interval identifying unit identifies the update interval of the current time data in the external device, the interval adjusting unit shortens or extends the update interval by a length corresponding to the time accuracy of the time measuring unit. Reset the time interval,
The current time acquisition means, based on the update interval, the reset communication time interval, and the arrangement pattern of the current time acquired for each communication time interval, current time data of the external device 2. The electronic timepiece according to claim 1, wherein a reception timing with the shortest delay time from the update timing to the reception timing of the current time data is identified, and the current time data is acquired at the reception timing.
<Claim 3>
The time correction means corrects the current time data of the time measuring means by a time obtained by adding half the maximum delay time that the current time can take to the current time acquired by the current time acquisition means. The electronic timepiece according to claim 1 or 2.
<Claim 4>
Table data associating an array of change amounts of the current time between the current times received for each communication time interval changed by the update interval identifying means and the update interval corresponding to the array of change amounts. Storage means for storing as,
The time adjustment means identifies the update interval by comparing the table data stored in the storage means with an arrangement pattern of the current time received for each communication time interval. The electronic timepiece according to 1.
<Claim 5>
Display means for displaying time;
Connection interval determination means for determining whether or not the communication time interval with the external device can be changed;
A determination unit that determines whether the communication time interval is a predetermined interval or more when the connection interval determination unit determines that the communication time interval with the external device cannot be changed;
The time correction means includes time acquisition means for acquiring current time data at the communication time interval that is not changed from the external device,
The electronic timepiece according to claim 1, further comprising: a control unit that causes the display unit to display a content indicating that there is an error in the display time when the determination unit determines that the interval is equal to or greater than the predetermined interval. .
<Claim 6>
The time acquisition means includes
6. The current time of the time measuring means is corrected by a time obtained by adding half the value of the communication time interval to the current time when the determining means determines that the predetermined time or more. Electronic clock.
<Claim 7>
In an electronic timepiece comprising a time measuring means for counting the current time and a communication means for transmitting and receiving data to and from an external device by wireless communication at a set communication time interval, the electronic timepiece is acquired from the external device by the communication means. A time correction method for correcting the current time of the time measuring means based on the current time data,
The time correction method is:
An interval adjustment step of changing the communication time interval to a value corresponding to the accuracy of the current time of the time measuring means while performing the correction process of the current time of the time measuring means;
For each communication time interval changed in the interval adjustment step, the communication unit receives current time data, and based on the received arrangement pattern of the current time and the communication time interval, the current time in the external device An update interval identifying step for identifying an update interval of the data;
Based on the update interval identified in the update interval identification step, the arrangement pattern of the current time, and the communication time interval, from the update timing of the current time data in the external device to the reception timing of the current time data Current time acquisition step of identifying a reception timing of the current time data that is smaller than a predetermined reference value set based on the accuracy of the current time of the time measuring means, and acquiring the current time data at the reception timing ,
A time correction method comprising:
<Claim 8>
Acquired by the communication means from the external device in a computer comprising a time measuring means for counting the current time and a communication means for transmitting and receiving data to and from the external device by wireless communication at a set communication time interval A program for realizing a time correction function for correcting the current time of the time measuring means based on current time data,
The time correction function is
An interval adjustment step of changing the communication time interval to a value corresponding to the accuracy of the current time of the time measuring means while performing the correction process of the current time of the time measuring means;
For each communication time interval changed in the interval adjustment step, the communication unit receives current time data, and based on the received arrangement pattern of the current time and the communication time interval, the current time in the external device An update interval identifying step for identifying an update interval of the data;
Based on the update interval identified in the update interval identification step, the arrangement pattern of the current time, and the communication time interval, from the update timing of the current time data in the external device to the reception timing of the current time data Current time acquisition step of identifying a reception timing of the current time data that is smaller than a predetermined reference value set based on the accuracy of the current time of the time measuring means, and acquiring the current time data at the reception timing ,
The program characterized by including.

1 Time Information Acquisition System 10 Smartphone 11 CPU
12 ROM
13 RAM
14 storage unit 15 operation unit 16 built-in clock 17 display unit 18 driver 19 speaker 20 microphone 21 codec 22 RF transmission / reception circuit 23 communication circuit 24 Bluetooth module 25 UART
26 Vibrating motor 27 Driver 28 Bus 40, 40b, 40c Electronic clock 41 CPU
42 ROM
42a, 42b, 42c Time data update program 43 RAM
44 Operation Unit 45 Timekeeping Circuit 46 Display Unit 47 Driver 48 Bluetooth Module 49 UART
50 Vibration motor 51 Driver 52 LED
53 Driver 54 Piezo element 55 Driver 56 Bus AN11, AN12, AN4 Antenna

Claims (8)

A time counting means for counting the current time;
A communication means for transmitting / receiving data to / from an external device by wireless communication at a set communication time interval;
Time correcting means for correcting the current time of the time measuring means based on current time data acquired from the external device by the communication means;
With
The time correction means includes
An interval adjusting means for changing the communication time interval to a predetermined value while performing a correction process of the current time of the time measuring means;
The current time data is received by the communication means for each communication time interval changed by the interval adjustment means, and the current time in the external device is based on the received arrangement pattern of the current time and the communication time interval. An update interval identifying means for identifying an update interval of data;
From the update timing of the current time data in the external device to the reception timing of the current time data based on the update interval identified by the update interval identification means, the arrangement pattern of the current time, and the communication time interval Current time acquisition means for identifying the reception time of the current time data that is smaller than a predetermined reference value set based on the accuracy of the current time of the time measuring means, and acquiring the current time data at the reception timing When,
An electronic timepiece characterized by comprising: When the update interval identifying unit identifies the update interval of the current time data in the external device, the interval adjusting unit shortens or extends the update interval by a length corresponding to the time accuracy of the time measuring unit. Reset the time interval,
The current time acquisition means, based on the update interval, the reset communication time interval, and the arrangement pattern of the current time acquired for each communication time interval, current time data of the external device 2. The electronic timepiece according to claim 1, wherein a reception timing with the shortest delay time from the update timing to the reception timing of the current time data is identified, and the current time data is acquired at the reception timing. The time correction means corrects the current time data of the time measuring means by a time obtained by adding half the maximum delay time that the current time can take to the current time acquired by the current time acquisition means. The electronic timepiece according to claim 1 or 2. Table data associating an array of change amounts of the current time between the current times received for each communication time interval changed by the update interval identifying means and the update interval corresponding to the array of change amounts. Storage means for storing as,
The time adjustment means identifies the update interval by comparing the table data stored in the storage means with an arrangement pattern of the current time received for each communication time interval. The electronic timepiece according to 1. Display means for displaying time;
Connection interval determination means for determining whether or not the communication time interval with the external device can be changed;
A determination unit that determines whether the communication time interval is a predetermined interval or more when the connection interval determination unit determines that the communication time interval with the external device cannot be changed;
The time correction means includes time acquisition means for acquiring current time data at the communication time interval that is not changed from the external device, and when the determination means determines that the predetermined time or more, the display time is displayed on the display means. The electronic timepiece according to claim 1, further comprising: a control unit that displays content indicating that there is an error. The time acquisition means includes
6. The current time of the time measuring means is corrected by a time obtained by adding half the value of the communication time interval to the current time when the determining means determines that the predetermined time or more. Electronic clock. In an electronic timepiece comprising a time measuring means for counting the current time and a communication means for transmitting and receiving data to and from an external device by wireless communication at a set communication time interval, the electronic timepiece is acquired from the external device by the communication means. A time correction method for correcting the current time of the time measuring means based on the current time data,
The time correction method is:
An interval adjustment step of changing the communication time interval to a predetermined value while performing the correction process of the current time of the time measuring means;
For each communication time interval changed in the interval adjustment step, the communication unit receives current time data, and based on the received arrangement pattern of the current time and the communication time interval, the current time in the external device An update interval identifying step for identifying an update interval of the data;
Based on the update interval identified in the update interval identification step, the arrangement pattern of the current time, and the communication time interval, from the update timing of the current time data in the external device to the reception timing of the current time data Current time acquisition step of identifying a reception timing of the current time data that is smaller than a predetermined reference value set based on the accuracy of the current time of the time measuring means, and acquiring the current time data at the reception timing ,
A time correction method comprising: Acquired by the communication means from the external device in a computer comprising a time measuring means for counting the current time and a communication means for transmitting and receiving data to and from the external device by wireless communication at a set communication time interval A program for realizing a time correction function for correcting the current time of the time measuring means based on current time data,
The time correction function is
An interval adjustment step of changing the communication time interval to a predetermined value while performing the correction process of the current time of the time measuring means;
For each communication time interval changed in the interval adjustment step, the communication unit receives current time data, and based on the received arrangement pattern of the current time and the communication time interval, the current time in the external device An update interval identifying step for identifying an update interval of the data;
Based on the update interval identified in the update interval identification step, the arrangement pattern of the current time, and the communication time interval, from the update timing of the current time data in the external device to the reception timing of the current time data Current time acquisition step of identifying a reception timing of the current time data that is smaller than a predetermined reference value set based on the accuracy of the current time of the time measuring means, and acquiring the current time data at the reception timing ,
The program characterized by including.

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