JP2019164013A - Electronic watch - Google Patents

Abstract

An object is to suppress an increase in power consumption. An electronic timepiece notifies a user of a time using an hour hand, a minute hand, a second hand, and the like. In addition, the electronic timepiece 100 executes the receiving operation by the antenna 150 or the like at a timing based on the time notified to the user. Further, the electronic timepiece 100 delays the timing of executing the receiving operation when the time to be notified to the user is corrected. Thereby, it is possible to prevent the frequency of the receiving operation from unintentionally increasing. [Selection diagram] Fig. 1

Description

  The present invention relates to an electronic timepiece.

  Conventionally, an electronic timepiece that receives a satellite signal or the like including time information and corrects the time counted in the timepiece is known. Also, at a predetermined time every day, it is determined whether it is a reception suspension day. If it is determined that it is not a reception suspension day, a satellite signal reception process is executed. An electronic timepiece that does not perform reception processing is known (for example, see Patent Document 1 below).

Japanese Patent Laying-Open No. 2015-232576

  However, in the above-described conventional technology, in a configuration in which a satellite signal or the like is received at a timing based on the time notified to the user, when the time is corrected by time zone change, daylight saving time setting, user operation, etc., the satellite There is a case in which the frequency of receiving operations such as signals may increase unintentionally, which increases the power consumption of the electronic timepiece.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic timepiece that can suppress an increase in power consumption in order to eliminate the above-described problems caused by the prior art.

  In order to solve the above-described problems and achieve the object, an electronic timepiece according to the present invention includes a notification unit that notifies a user of a time, a reception unit that performs a reception operation of receiving a predetermined radio wave, and a timing based on the time And a control unit that causes the reception unit to execute the reception operation and delays the timing when the time is corrected.

  Thereby, it can suppress that the frequency of receiving operation becomes unintentionally high.

  According to one aspect of the present invention, there is an effect that an increase in power consumption can be suppressed.

FIG. 1 is a diagram illustrating an example of an appearance of an electronic timepiece according to the first embodiment. FIG. 2 is a diagram illustrating an example of a hardware configuration of the electronic timepiece according to the first embodiment. FIG. 3 is a diagram illustrating an example of each piece of information related to time managed by the electronic timepiece according to the first embodiment. FIG. 4 is a diagram illustrating an example of a delay in automatic reception timing by the electronic timepiece according to the first embodiment. FIG. 5 is a flowchart of an example of a receiving operation execution process performed by the electronic timepiece according to the first embodiment. FIG. 6 is a flowchart illustrating an example of an automatic reception permission flag setting process by the electronic timepiece according to the first embodiment. FIG. 7 is a flowchart of another example of the automatic reception permission flag setting process by the electronic timepiece according to the first embodiment. FIG. 8 is a flowchart showing still another example of the automatic reception permission flag setting process by the electronic timepiece according to the first embodiment. FIG. 9 is a flowchart of an example of a receiving operation execution process by the electronic timepiece according to the second embodiment. FIG. 10 is a flowchart illustrating an example of an automatic reception permission flag setting process by the electronic timepiece according to the second embodiment. FIG. 11 is a flowchart of another example of the automatic reception permission flag setting process by the electronic timepiece according to the second embodiment. FIG. 12 is a flowchart illustrating still another example of the automatic reception permission flag setting process by the electronic timepiece according to the second embodiment.

  Embodiments of an electronic timepiece according to the present invention will be described below in detail with reference to the drawings.

(Embodiment 1)
(External appearance of electronic timepiece according to Embodiment 1)
FIG. 1 is a diagram illustrating an example of an appearance of an electronic timepiece according to the first embodiment. As shown in FIG. 1, an electronic timepiece 100 according to the first embodiment includes a dial 110, an hour hand 121, a minute hand 122, and a second hand 123, which are hands indicating time, arranged in a trunk that is an exterior case 101. , A wristwatch including an antenna 150 and a solar cell 160. The exterior of the electronic timepiece 100 may be composed of two bodies, a bezel and a body.

  The hour hand 121, the minute hand 122, and the second hand 123 are hands that display time according to a relative position with respect to the dial 110. For example, the second hand 123 may be used to display information different from the time, such as “RX-TIME”, “RX-GPS”, “OK”, “NO”, which will be described later.

  Further, in the electronic timepiece 100, a crown 131, a first push button 132, and a second push button 133 are arranged on the side of the body as an operation unit 130 for a user of the electronic timepiece 100 to perform various operations. ing. In the example shown in FIG. 1, the crown 131 is disposed on the 3 o'clock side, the first push button 132 is disposed on the 2 o'clock side, and the second push button 133 is disposed on the 4 o'clock side.

  The electronic timepiece 100 is provided with a windshield formed of a transparent material such as glass so as to cover the dial 110. A back cover is attached to the case on the opposite side of the windshield in the electronic timepiece 100. Hereinafter, the direction in which the windshield is arranged in the electronic timepiece 100 (the front side in FIG. 1) is referred to as the front side, and the direction in which the back cover is arranged in the electronic timepiece 100 (the back direction in the drawing in FIG. 1) is referred to as the back side.

  The electronic timepiece 100 is a solar cell timepiece that uses light energy such as the sun as a power source. In the example shown in FIG. 1, a solar cell 160 is disposed on the back side of the dial plate 110, and power is generated in the solar cell 160 by light incident from the front side. Therefore, the dial 110 is made of a material that transmits light to some extent.

  The electronic timepiece 100 also receives satellite radio waves including time information regarding date and time from the satellite. The satellite is, for example, a GPS satellite. GPS is an abbreviation for Global Positioning System (Global Positioning System). In the example shown in FIG. 1, an antenna 150 for receiving satellite radio waves is disposed in a region where the electronic timepiece 100 does not overlap with the solar cell 160.

  The front surface of the antenna 150 is a receiving surface that receives radio waves from a satellite. The receiving surface of the antenna 150, the light receiving surface of the solar cell 160, and the dial plate 110 are provided in parallel to each other, and all face the front side. For example, the antenna 150 is a patch antenna that receives satellite radio waves transmitted from GPS satellites. However, the antenna 150 is not limited to a patch antenna, and may be, for example, a chip antenna or an inverted F antenna.

  The electronic timepiece 100 receives satellite radio waves using the antenna 150 to perform, for example, time measurement reception, positioning reception, and leap second reception. Timing reception, positioning reception, and leap second reception are reception operations for receiving different information included in satellite radio waves.

  The time measurement reception is a reception of receiving time information (TOW) of satellite radio waves in order to correct the internal time (for example, the internal time 301 shown in FIG. 3) which is the time information held in the electronic timepiece 100. Is the action. The time information (TOW) is information included in a satellite radio wave every 6 seconds, for example.

  Positioning reception is a receiving operation of receiving data for 30 seconds included in each satellite radio wave from, for example, four GPS satellites in order to specify the time zone (city) of the position of the electronic timepiece 100. The positioning reception may include an operation of receiving the time information (TOW) and the week number (WN) described above. The week number (WN) is information included in satellite radio waves every 30 seconds, for example.

  The leap second reception is a reception operation for receiving leap second information (for example, the fourth subframe on page 18) of the satellite radio wave in order to correct the leap second of the electronic timepiece 100. For example, leap second information is included in satellite radio waves every 12.5 minutes. The leap second reception may include an operation of receiving the above time information (TOW). The leap second reception may include an operation of receiving the week number (WN) described above.

  Each of these reception operations is performed manually or automatically. Performing the reception operation manually means, for example, performing the reception operation in response to a specific operation from the user on the electronic timepiece 100. The specific operation is an operation intended for the user to cause the electronic timepiece 100 to execute the reception operation, for example. An operation for causing the electronic timepiece 100 to perform time measurement reception is, for example, a short press of the second push button 133 (for example, a press of 2 seconds or more and less than 7 seconds). An operation for causing the electronic timepiece 100 to execute leap second reception is, for example, a long press of the second push button 133 (for example, a press for 7 seconds or more). An operation for causing the electronic timepiece 100 to execute positioning reception is, for example, a short press of the first push button 132.

  Performing the reception operation automatically means, for example, performing the reception operation in response to satisfying a specific condition that can be determined by the electronic timepiece 100 without performing an operation on the electronic timepiece 100 by the user. The specific condition includes, for example, a condition determined based on a display time (for example, display time 304 shown in FIG. 3) displayed on the user by the electronic timepiece 100.

  Further, the dial plate 110 is marked with marks such as “RX-TIME”, “RX-GPS”, “OK”, “NO”, and the like. Each of these marks is a mark written on the dial plate 110 by various methods such as printing or stamping.

  “RX-TIME” is a measurement for displaying by the second hand 123 that time reception or leap second reception is being performed, for example, when the timepiece reception or leap second reception is performed by the electronic timepiece 100. This is a common mark for hour reception and leap second reception. “RX-GPS” is a mark for displaying by the second hand 123 that positioning reception is being performed when the above-described positioning reception is performed by the electronic timepiece 100. “OK” and “NO” are marks for displaying the success or failure of each reception operation by the electronic timepiece 100 with the second hand 123.

  The appearance of the electronic timepiece 100 illustrated in FIG. 1 is an example, and the appearance of the electronic timepiece 100 is not limited thereto. For example, the body may be square instead of round, and the presence / absence, number, arrangement, and type of the operation unit such as the crown 131 can be arbitrarily changed. In addition, day of the week, presence / absence of daylight saving time, reception state of radio waves, remaining battery level, pointers for performing various displays, date display, and the like may be added.

(Hardware configuration of the electronic timepiece according to the first embodiment)
FIG. 2 is a diagram illustrating an example of a hardware configuration of the electronic timepiece according to the first embodiment. In FIG. 2, the same parts as those shown in FIG. As shown in FIG. 2, the electronic timepiece 100 according to the first embodiment includes an operation unit 130, an antenna 150, a solar cell 160, a receiving circuit 220, a control circuit 230, a motor driving circuit 241, and a driving mechanism. 242, the display unit 243, the secondary battery 251, and the switch 252.

  The receiving circuit 220 decodes satellite radio waves from the GPS satellites received by the antenna 150, and outputs a bit string (received data) indicating the contents of the satellite radio waves obtained by the decoding. For example, the reception circuit 220 converts the analog signal received by the antenna 150 into a baseband signal by performing amplification and detection on the analog signal received by the antenna 150. Then, the reception circuit 220 generates a bit string indicating the content of data received from the GPS satellite by decoding the converted baseband signal. Then, the reception circuit 220 outputs the generated bit string to the control circuit 230.

  The control circuit 230 includes an RTC 231, a calculation unit 232, a time difference setting unit 233, and a counter 234. RTC is an abbreviation for Real Time Clock. The control circuit 230 can be realized by an information processing device such as a microcomputer. Such an information processing apparatus includes, for example, a CPU, a RAM, and a ROM connected to each other by a bus or the like. CPU is an abbreviation for Central Processing Unit. RAM is an abbreviation for Random Access Memory. ROM is an abbreviation for Read Only Memory.

  The RTC 231 supplies a clock signal used for timing in the electronic timepiece 100. The clock signal supplied by the RTC 231 is used in the calculation unit 232 to advance the internal time of the calculation unit 232 as the actual time advances.

  The arithmetic unit 232 is realized by the above-described CPU, for example, uses the above-described RAM as a work memory, and performs various types of information processing by operating according to a program stored in the above-described ROM. Details of the processing executed by the calculation unit 232 will be described later.

  The arithmetic unit 232 controls the receiving circuit 220 automatically or manually to perform the various receiving operations described above. The manual reception operation is executed, for example, when the above-described specific operation is received by the operation unit 130. The automatic reception operation is executed when the specific condition described above determined based on at least the display time displayed on the user by the electronic timepiece 100 is satisfied. The calculation unit 232 determines whether or not this specific condition is satisfied using a counter 234 described later.

  For example, the arithmetic unit 232 performs time measurement reception by controlling the receiving circuit 220 so as to receive satellite radio waves including the time information (TOW) described above. In addition, the calculation unit 232 performs positioning that specifies the current position of the electronic timepiece 100 based on time information (TOW) received by time measurement reception. In addition, the arithmetic unit 232 performs positioning reception by controlling the receiving circuit 220 so as to receive each satellite radio wave from the four GPS satellites described above. In addition, the calculation unit 232 performs leap second reception by controlling the receiving circuit 220 so as to receive satellite radio waves including the above leap second information.

  In addition, based on leap second information received by leap second reception, the arithmetic unit 232 corrects leap seconds for correcting the time information included in the satellite radio waves to a time compliant with the Coordinated Universal Time. The arithmetic unit 232 measures the internal time based on the clock signal supplied from the RTC 231 and corrects the internal time based on the time information received by the time measurement reception and the leap second based on the above leap second information. To do. The internal time is, for example, UTC. UTC is an abbreviation for Coordinated Universal Time.

  In addition, when the electronic timepiece 100 is in the normal mode for displaying the time, the calculation unit 232 displays the display unit 243 based on the corrected internal time and the time zone of the own device set by the time difference setting unit 233. To determine the time (display time) to be displayed, and controls the motor drive circuit 241 so that the display unit 243 displays the determined time. Further, the calculation unit 232 may use the summer time set by the time difference setting unit 233 to determine the display time.

  The time difference setting unit 233 corresponds to the current position of the electronic timepiece 100 based on, for example, the current position of the electronic timepiece 100 specified by the calculation unit 232 and the map data stored in the memory (for example, ROM) of the own device. The time difference (for example, time zone) is determined. Then, the time difference setting unit 233 sets the determined time difference as the time difference of the own device. The time difference is set, for example, as information that indirectly indicates the time difference such as a time zone or a city name, or information that directly indicates the time difference.

  The time difference setting unit 233 may set a time difference based on information from another terminal (for example, a smartphone) received by the communication interface 271 as the time difference of the own device. The time difference setting unit 233 may set the time difference instructed by the user through the operation unit 130 as the time difference of the own device. For example, when the user rotates the crown 131 of the operation unit 130 and designates the city indicated on the turn ring of the electronic timepiece 100 illustrated in FIG. 1 with the second hand 123 or the like, the time difference setting unit 233 displays the designated city. Set the corresponding time difference. Further, the time difference setting unit 233 may automatically or manually set the summer time of its own device separately from the time difference.

  The counter 234 counts the elapsed time after the reception operation is executed by the calculation unit 232. For example, the counter 234 is realized by a memory (RAM or ROM) of the electronic timepiece 100. For example, the calculation unit 232 increments the count value of the counter 234 every time the display time becomes a predetermined time every day or every time the display time becomes a specific day of the week. The increment timing is not limited to once a day, and may be performed twice or more a day, for example, every time the display time becomes AM0 and PM0. Thus, by incrementing the counter each time a certain starting point is passed, it is possible to simplify rather than calculating a simple elapsed time, and it is easy to count for a long time. In addition, the arithmetic unit 232 resets (initializes) the count value of the counter 234 when the reception operation is executed. Then, when the count value of the counter 234 reaches a predetermined value, the calculation unit 232 determines that an automatic reception operation is to be executed.

  The motor drive circuit 241 outputs a drive signal for driving a motor included in the drive mechanism 242 described later in accordance with control from the control circuit 230 (calculation unit 232). The drive mechanism 242 includes a step motor that operates according to a drive signal output from the motor drive circuit 241 and a train wheel, and the train wheel transmits the rotation of the step motor, whereby the display unit 243 is provided. , Hands such as the hour hand 121, the minute hand 122, the second hand 123 and the like are rotated.

  The display unit 243 includes, for example, pointers such as the hour hand 121, the minute hand 122, and the second hand 123 shown in FIG. For example, the current time is displayed as the hour hand 121, the minute hand 122 and the second hand 123 rotate on the dial 110.

  The secondary battery 251 stores the electric power generated by the solar battery 160. The secondary battery 251 supplies the accumulated power to the receiving circuit 220 and the control circuit 230. The secondary battery 251 can be realized by, for example, a lithium ion battery.

  A switch 252 is provided in the middle of the power supply path from the secondary battery 251 to the receiving circuit 220, and the on / off of the switch 252 is switched by a control signal output from the control circuit 230 (calculation unit 232). For example, the operation timing of the reception circuit 220 is controlled by the calculation unit 232 of the control circuit 230 switching on / off of the switch 252. In this case, the reception circuit 220 operates only while power is supplied from the secondary battery 251 via the switch 252 and decodes the satellite radio waves received by the antenna 150 during that time.

  For example, as illustrated in FIG. 1, the operation unit 130 includes a crown 131, a first push button 132, a second push button 133, and the like. The control circuit 230 executes various processes according to the content of the operation input received by the operation unit 130. For example, the control circuit 230 performs reception operations such as reception of time measurement, positioning reception, and leap second reception described above in response to an operation input to the operation unit 130 by the user.

  Further, the electronic timepiece 100 may include a communication interface 271 so that radio waves other than satellite radio waves and communication with external devices can be performed. The communication interface 271 is controlled by the control circuit 230. As an example of the communication interface 271, a communication interface for wireless communication such as Bluetooth (registered trademark) or Wi-Fi (registered trademark) may be used, or a communication interface for communication by wired connection such as a USB cable may be used. USB is an abbreviation for Universal Serial Bus. Note that when the communication by the communication interface 271 is wireless communication, the communication interface 271 includes an antenna and a receiving circuit.

  In the electronic timepiece 100 shown in FIG. 2, the notification unit that notifies the user of the time can be realized by, for example, the control circuit 230, the motor drive circuit 241, the drive mechanism 242, and the display unit 243. In addition, a receiving unit that performs a receiving operation for receiving a predetermined radio wave can be realized by the receiving circuit 220 and the antenna 150, for example. In addition, a control unit that causes the reception unit to perform a reception operation at a timing based on the time notified by the notification unit and delays the timing of the reception operation when the time is corrected can be realized by the control circuit 230, for example. it can.

(Each information regarding the time managed by the electronic timepiece according to the first embodiment)
FIG. 3 is a diagram illustrating an example of each piece of information related to time managed by the electronic timepiece according to the first embodiment. For example, the electronic timepiece 100 (for example, the arithmetic unit 232) illustrated in FIG. 2 manages, for example, an internal time 301, a time difference 302, a summer time 303, a display time 304, and a count value 305 as information about time.

  The internal time 301 is set based on the time information obtained by the above-described time measurement reception and the leap second information obtained by the above-described leap second reception. Also, the internal time 301 proceeds based on the clock signal from the RTC 231 shown in FIG. The time difference 302 is a time difference (for example, a time zone) set by the time difference setting unit 233 shown in FIG. The daylight saving time 303 is the daylight saving time set by the time difference setting unit 233 shown in FIG.

  The display time 304 is a time obtained by correcting the internal time 301 with correction information such as the time difference 302 and the summer time 303. The electronic timepiece 100 displays the display time 304 to the user using the display unit 243.

  The display time 304 can be manually corrected. Manual time correction is performed, for example, when the user performs a predetermined operation on the operation unit 130 described above. When manual time correction is performed, the display time 304 is corrected to the time specified by the manual time correction regardless of the internal time 301, the time difference 302, and the summer time 303, and proceeds with the corrected time as a reference. .

  The count value 305 is the count value of the counter 234 shown in FIG. The calculation unit 232 illustrated in FIG. 2 increments the count value 305 every time the display time 304 becomes a predetermined time every day. The predetermined time is, for example, “00:00” (0: 0). The arithmetic unit 232 illustrated in FIG. 2 determines the execution of an automatic reception operation (automatic reception) based on the count value 305 of the counter 234.

  As described above, the electronic timepiece 100 performs the reception operation at the timing based on the display time 304 instead of the internal time 301. This is because, for example, it is desirable that the reception operation is performed in a specific real time zone. For example, an electronic watch that receives standard radio waves is preferably in the midnight zone, and an electronic watch that receives satellite radio waves is likely to be outdoors during the daytime (any time between dawn and evening) Are preferred. The operation in which the calculation unit 232 determines the execution of automatic reception based on the count value 305 and starts the reception operation may be configured to continuously process when each time zone is reached, or may be performed at a predetermined time first. It is also possible to perform a process for determining whether automatic reception is performed in step S <b> 1, wait for a predetermined period after it is determined to be executed, and then start the reception operation. In that case, a standby counter that counts the standby period may be provided.

  Further, when performing automatic reception, a reception environment check process may be performed to determine whether or not the electronic timepiece 100 is in an environment suitable for reception. An environment suitable for reception is, for example, a situation where the user is outdoors. Whether or not it is outdoors can be determined, for example, as whether sunlight during the day has been detected. Specifically, for example, the illuminance is calculated based on the detection result of the light intensity by the optical sensor provided in the electronic timepiece 100, the detection result of the power generation amount by the solar battery 160, and the calculated illuminance exceeds a predetermined threshold value. In some cases, it can be determined that the user is outdoors.

  The count value 305 is incremented based on the display time 304 as described above. For this reason, for example, when the display time 304 is corrected by switching the time difference 302, the count value 305 may increase faster than the original pace as the internal time 301 progresses.

  For example, when the display time 304 is corrected to advance the display time 304 and the display time 304 does not cross the predetermined time by the correction, the count value 305 is incremented faster than originally. As an example, when the above-mentioned predetermined time is set to “00:00” and the display time 304 is corrected to advance from “20:55” to “23:55”, it is originally counted after 3 hours and 5 minutes. Although the value 305 is incremented, the count value 305 is incremented after 5 minutes.

  In addition, when the display time 304 is corrected so that the display time 304 crosses the predetermined time, the count value 305 is incremented faster than originally. As an example, when the above-mentioned predetermined time is set to “00:00” and the display time 304 is corrected to return from “00:55” to “23:55”, it is originally counted after 23 hours and 5 minutes. Although the value 305 is incremented, the count value 305 is incremented after 5 minutes.

  On the other hand, the arithmetic unit 232 resets the count value 305 when, for example, the time difference 302 is different from the count start time. Thereby, it can suppress that the frequency of automatic reception becomes unintentionally high.

(Delay in timing of automatic reception by the electronic timepiece according to the first embodiment)
FIG. 4 is a diagram illustrating an example of a delay in automatic reception timing by the electronic timepiece according to the first embodiment. In FIG. 4, the same parts as those shown in FIG. In FIG. 4, the horizontal axis indicates the actual time. In the example illustrated in FIG. 4, the electronic timepiece 100 performs automatic reception when the count value 305 reaches a predetermined value = “3”.

  It is assumed that the count value 305 is “2” at time t1. Further, it is assumed that the electronic timepiece 100 switches the time difference 302 at time t1, and the display time 304 is corrected from “18:00” on 12/12 to “5:00” on 12/13. In this case, the electronic timepiece 100 resets the count value 305 at time t1. As a result, the count value 305 becomes “0”.

  Thereafter, the electronic timepiece 100 increments the count value 305 every time the display time 304 becomes “00:00”, and the count value 305 becomes “3” (predetermined value) at time t2. In this case, the electronic timepiece 100 does not execute the above-described reception operation from time t1 to immediately before time t2, and performs the reception operation at time t2. Further, the electronic timepiece 100 resets the count value 305 at time t2. As a result, the count value 305 becomes “0”.

(Execution processing of reception operation by electronic watch according to first embodiment)
FIG. 5 is a flowchart of an example of a receiving operation execution process performed by the electronic timepiece according to the first embodiment. The electronic timepiece 100 according to the first embodiment repeatedly executes, for example, each step illustrated in FIG. 5 as a reception operation execution process including at least one of time measurement reception, positioning reception, and leap second reception. Each step shown in FIG. 5 is executed by, for example, the control circuit 230 shown in FIG.

  First, the electronic timepiece 100 determines whether or not a reception operation for instructing execution of a manual reception operation has been received from the user via the operation unit 130 (step S501). When the reception operation is accepted (step S501: Yes), the electronic timepiece 100 proceeds to step S505.

  If the reception operation is not accepted in step S501 (step S501: No), the electronic timepiece 100 determines whether or not the automatic reception permission flag is “true” (step S502). The automatic reception permission flag is information indicating whether automatic reception is permitted because a condition determined based on the display time 304 of the electronic timepiece 100 is satisfied. When the automatic reception permission flag is “true”, it indicates that automatic reception is permitted, and when the automatic reception permission flag is “false”, it indicates that automatic reception is not permitted. The automatic reception permission flag is stored in, for example, a memory (for example, RAM or ROM) of the control circuit 230 shown in FIG.

  In step S502, if the automatic reception permission flag is not “true” (step S502: No), that is, if the automatic reception permission flag is “false”, the electronic timepiece 100 performs a series of processes without performing the reception operation. finish. If the automatic reception permission flag is “true” (step S502: Yes), the electronic timepiece 100 performs a reception environment check process for detecting the illuminance around the electronic timepiece 100 (step S503). The illuminance around the electronic timepiece 100 can be determined based on, for example, the detection result of the light intensity by the optical sensor provided in the electronic timepiece 100, the detection result of the power generation amount by the solar cell 160, or the like.

  Next, the electronic timepiece 100 determines whether or not the illuminance detected in step S503 is greater than or equal to a predetermined threshold (step S504). If the illuminance is not equal to or greater than the threshold (step S504: No), it is determined that the amount of power generated by the solar battery 160 is small and the secondary battery 251 is likely to run out of remaining battery power when receiving operation is performed. Can do. In this case, the electronic timepiece 100 ends the series of processes without performing the receiving operation.

  In step S504, when the illuminance is greater than or equal to the threshold value (step S504: Yes), the amount of power generated by the solar battery 160 is large, and it is unlikely that the remaining battery level of the secondary battery 251 will be insufficient even if the reception operation is performed Can be determined. In this case, the electronic timepiece 100 resets the count value 305 of the counter 234 (step S505). Further, the electronic timepiece 100 sets the automatic reception permission flag to “false” (step S506). In addition, the electronic timepiece 100 performs a receiving operation (step S507) and ends a series of processes. Steps S505 to S507 may be switched in order.

  Further, when the process shown in FIG. 8 to be described later is executed as the automatic reception permission flag setting process, for example, in step S505 shown in FIG. 5, the electronic timepiece 100 clears the count history information stored in the memory.

  According to the processing shown in FIG. 5, automatic reception is performed when the illuminance around the electronic timepiece 100 satisfies a predetermined condition in addition to satisfying the condition determined based on the display time 304. Can do. However, the electronic timepiece 100 may perform automatic reception when the condition determined based on the display time 304 is satisfied without using the condition related to the illuminance around the electronic timepiece 100. In this case, the electronic timepiece 100 omits step S503 and step S504, and when the automatic reception permission flag is “true” in step S502 (step S502: Yes), the process proceeds to step S505. In this case, automatic reception is performed when the automatic reception permission flag becomes “true”.

  Alternatively, in addition to satisfying the condition determined based on the display time 304 of the electronic timepiece 100, automatic reception is performed when an additional condition different from the condition related to the illuminance around the electronic timepiece 100 is satisfied. May be. The additional condition may be, for example, that the display time 304 has reached a specific time. Further, the additional condition may be that the remaining charge of the secondary battery 251 is a predetermined amount or more. Further, the additional condition may be that the posture of the electronic timepiece 100 or the user of the electronic timepiece 100 becomes a specific posture. These postures can be determined by, for example, an acceleration sensor or a gyro sensor provided in the electronic timepiece 100. Alternatively, the additional condition may be any combination of the above-described conditions.

(Automatic reception permission flag setting process by the electronic timepiece according to the first embodiment)
FIG. 6 is a flowchart illustrating an example of an automatic reception permission flag setting process by the electronic timepiece according to the first embodiment. The electronic timepiece 100 according to the first embodiment repeatedly executes, for example, the steps shown in FIG. 6 as the automatic reception permission flag setting process together with the reception operation execution process shown in FIG. Each step shown in FIG. 6 is executed by, for example, the control circuit 230 shown in FIG.

  First, the electronic timepiece 100 determines whether or not the current time difference 302 is different from the time difference 302 at the start of counting the current count value 305 (step S601). The start of counting is, for example, setting the count value 305 to “0”. For example, the electronic timepiece 100 is activated to initialize the count value 305, or the count value 305 is reset in step S607 described later. Including (initialization).

  For example, the electronic timepiece 100 stores flag information in a memory (eg, RAM or ROM) that becomes “true” when the time difference 302 is switched and becomes “false” when the count value 305 is reset. Whether or not it is different from the count start time can be determined based on the flag information. Alternatively, every time the time difference 302 is switched, the electronic timepiece 100 stores the history information in the memory, and the electronic timepiece 100 may determine whether the time difference 302 is different from the count start time based on the history information. Good. Alternatively, the electronic timepiece 100 stores the time difference 302 set at the start of the count value 305 in the memory, and stores in the memory whether or not the time difference 302 is different from the count start time. This may be done by comparing the current time difference 302 with the currently set time difference 302.

  In step S601, when the time difference 302 is the same as the count start time (step S601: No), the electronic timepiece 100 determines whether or not the current display time 304 is a predetermined time (step S602). The predetermined time is an increment timing of the count value 305, and is “00:00” as an example as described above. Moreover, this predetermined time may exist several times every day.

  In step S602, when the display time 304 is not a predetermined time (step S602: No), the electronic timepiece 100 proceeds to step S604. When the display time 304 is a predetermined time (step S602: Yes), the electronic timepiece 100 increments the count value 305 (step S603).

  Next, the electronic timepiece 100 determines whether or not the count value 305 is greater than or equal to a predetermined value (step S604). For example, when the above-mentioned predetermined time exists once a day and the reception operation is performed about once every six days, the predetermined value can be set to “6”, for example.

  In step S604, when the count value 305 is equal to or larger than the predetermined value (step S604: Yes), the electronic timepiece 100 sets the above-described automatic reception permission flag to “true” (step S605), and ends the series of processes. To do. If the count value 305 is not greater than or equal to the predetermined value (step S604: No), the electronic timepiece 100 sets the above-described automatic reception permission flag to “false” (step S606) and ends the series of processes.

  In step S601, when the time difference 302 is different from the count start time (step S601: Yes), the electronic timepiece 100 resets the count value 305 (step S607), and proceeds to step S604.

  If the time difference 302 is different from that at the start of counting by the setting process of the automatic reception permission flag shown in FIG. 6, the automatic reception can be postponed by resetting the count value 305. For this reason, it can suppress that the frequency of automatic reception becomes unintentionally high.

  FIG. 7 is a flowchart of another example of the automatic reception permission flag setting process by the electronic timepiece according to the first embodiment. The electronic timepiece 100 according to the first embodiment may repeatedly execute, for example, each step illustrated in FIG. 7 as the automatic reception permission flag setting process together with the reception operation execution process illustrated in FIG. 5. Each step shown in FIG. 7 is executed by, for example, the control circuit 230 shown in FIG.

  First, the electronic timepiece 100 determines whether or not the current display time 304 is a predetermined time (step S701). If the display time 304 is not a predetermined time (step S701: No), the electronic timepiece 100 proceeds to step S704.

  In step S701, when the display time 304 is a predetermined time (step S701: Yes), the electronic timepiece 100 determines whether the current time difference 302 is different from the time difference 302 at the start of counting the current count value 305. Is determined (step S702). If the time difference 302 is different from the count start time (step S702: Yes), the electronic timepiece 100 proceeds to step S707.

  In step S702, when the time difference 302 is the same as the count start time (step S702: No), the electronic timepiece 100 proceeds to step S703. Steps S703 to S707 shown in FIG. 7 are the same as steps S603 to S607 shown in FIG.

  By the setting process of the automatic reception permission flag shown in FIG. 7, it is possible to determine whether or not the time difference 302 is different from the count start time when the current display time 304 is a predetermined time. As a result, when the time difference 302 is switched back after the time difference 302 is switched until the current display time 304 becomes the next predetermined time, the count value 305 may not be reset. it can.

  Therefore, for example, when the user accidentally switches the time difference 302 and then switches back the time difference 302, or when the user temporarily switches the time difference 302 to see the time in a region different from the current position, automatic reception is performed. You can avoid postponing. For this reason, it can suppress that the frequency of automatic reception falls unintentionally.

  FIG. 8 is a flowchart showing still another example of the automatic reception permission flag setting process by the electronic timepiece according to the first embodiment. The electronic timepiece 100 according to the first embodiment may repeatedly execute, for example, the steps shown in FIG. 8 as the automatic reception permission flag setting process together with the reception operation execution process shown in FIG. Each step shown in FIG. 8 is executed by, for example, the control circuit 230 shown in FIG.

  First, the electronic timepiece 100 determines whether or not the time difference 302 has been switched since the count of the current count value 305 of the counter 234 was started (step S801). For example, the electronic timepiece 100 can determine whether or not the time difference 302 has been switched based on the above-described flag information. Alternatively, the electronic timepiece 100 may determine whether or not the time difference 302 has been switched based on the history information described above.

  If the time difference 302 is not switched in step S801 (step S801: No), the electronic timepiece 100 proceeds to step S802. Steps S802 to S806 shown in FIG. 8 are the same as steps S602 to S606 shown in FIG. When the time difference 302 is switched (step S801: Yes), the electronic timepiece 100 determines whether or not the current time difference 302 is included in the count history information (step S807). The count history information is correspondence information between the time difference 302 and the count value 305 counted in the past in the time difference 302, and is stored in the memory of the electronic timepiece 100 in step S808 described later.

  In step S807, when the current time difference 302 is not included in the count history information (step S807: No), the electronic timepiece 100 counts the time history 302 before switching and the current count value 305 in association with each other. Information is stored in a memory (for example, RAM or ROM) of the electronic timepiece 100 (step S808). Next, the electronic timepiece 100 resets the count value 305 (step S809), and proceeds to step S804.

  In step S807, when the current time difference 302 is included in the count history information (step S807: Yes), the electronic timepiece 100 sets the count value 305 to the count value associated with the current time difference 302 in the count history information. Set (step S810), the process proceeds to step S804.

  When executing the setting process shown in FIG. 8, the electronic timepiece 100 clears the count history information stored in the memory, for example, in step S505 shown in FIG. The time difference 302 and the count value 305 at the time of resetting the counter 234 are saved in the memory by the setting process of the automatic reception permission flag shown in FIG. The counter 234 can be restarted with reference to the count value 305.

  For example, a case will be described in which the user of the electronic timepiece 100 moves in the order of Tokyo, New York, and Tokyo, and accordingly, the time difference 302 of the electronic timepiece 100 changes in the order of Tokyo, New York, and Tokyo. Here, the predetermined value to be compared with the count value 305 in step S804 is “6”.

  First, it is assumed that the count value 305 advances to “2” in a state where the time difference 302 of the electronic timepiece 100 is Tokyo, and the time difference 302 of the electronic timepiece 100 changes to New York in that state. In this case, in step S808, the electronic timepiece 100 stores count history information in which Tokyo, which is the time difference 302 before switching, and the current count value “2” are associated with each other. In addition, the electronic timepiece 100 resets the count value 305 in step S809.

  Next, it is assumed that the count value 305 advances from “0” to “3” in a state where the time difference 302 of the electronic timepiece 100 is New York, and the time difference 302 of the electronic timepiece 100 changes to Tokyo in that state. In this case, the electronic timepiece 100 stores count history information in which New York, which is the time difference 302 before switching, and “3”, which is the current count value 305, are associated in step S808. In addition, the electronic timepiece 100 resets the count value 305 in step S809.

  Further, in this case, since the electronic timepiece 100 includes Tokyo, which is the current time difference 302, in the count history information, in step S810, the count value 305 is set to the count value associated with Tokyo in the count history information. Is set to “2”. Next, it is assumed that the count value 305 that starts counting from “2” reaches “6” in a state where the time difference 302 of the electronic timepiece 100 is Tokyo.

  In this case, the electronic timepiece 100 sets the automatic reception permission flag to “true” in step S805 because the count value of the counter 234 is equal to or greater than the predetermined value “6”. Therefore, if other conditions such as illuminance are satisfied, the electronic timepiece 100 performs automatic reception by the processing shown in FIG. At this time, the electronic timepiece 100 clears each count history information about Tokyo and New York in step S505 shown in FIG.

  Also, the total value of the accumulated value of each time difference stored in the count history information and the current count value 305 is stored, and when this total value is equal to or greater than a certain threshold, the automatic reception permission flag is set to “true”. You may comprise so that it may set to. This threshold value is preferably a value larger than the above-mentioned predetermined value, and for example, is preferably a numerical value equal to or greater than twice the predetermined value.

  If the count value 305 of the counter 234 exceeds a predetermined value and is switched to a plurality of cities (time differences) one after another, the reception frequency may be extremely lowered and the clock accuracy may be lowered. Therefore, by adding the count value in each time difference stored in the count history information every time the time difference is switched and the current count value exceeds a certain threshold, the automatic reception permission flag is set to “true”. Therefore, it is possible to suppress a decrease in clock accuracy due to not being received for a long time.

  As a specific example, the predetermined value to be compared with the count value 305 is “6”, the count value “3” already associated with Tokyo as count history information, the count value “2” associated with New York, and London It is assumed that the assigned count value “5” is stored, the current time difference (city) is Beijing, and the count value 305 is “4”. At this time, since the integrated value of the count history information is “10” and the count value 305 is “4”, the total value is “14”, which is a difference more than twice as large as the predetermined value “6”. Therefore, there is a concern that the clock accuracy may be reduced due to non-reception. In this case, if the threshold is set to “12” or more, the automatic reception permission flag is set to “true” when the count value 305 in the current location (Beijing) becomes “2”.

  That is, the electronic timepiece 100 stores the count value for each of the time differences 302, and the sum of the count values for each of the time differences 302 (the count values of the count history information and the current count value 305) is greater than a predetermined value. The reception operation may also be executed at the reached timing. When the display time 304 is corrected by the daylight saving time 303, the electronic timepiece 100 stores a count value for each daylight saving time 303 or for each combination of the time difference 302 and the daylight saving time 303, and the sum of each count value is greater than a predetermined value. The reception operation may be executed even when the large value is reached.

  As described above, according to the electronic timepiece 100 according to the first embodiment, the reception operation is executed at the timing based on the time notified to the user, and the execution timing of the reception operation is corrected when the time notified to the user is corrected. Can be delayed. Thereby, it can suppress that the frequency of reception operation | movement becomes high unintentionally, and can suppress the increase in power consumption. For this reason, for example, a system down or a function restriction due to a decrease in battery voltage in the secondary battery 251 can be avoided.

  For example, the time notified to the user is the display time 304 based on the time difference 302 set in the own device (electronic clock 100), and the electronic timepiece 100 determines the timing of execution of the reception operation when the time difference 302 is changed. Delay. However, the correction of the display time 304 is not limited to the change of the time difference 302 but can be various corrections that change the progress of the display time 304 based on the internal time 301.

  For example, when the display time 304 is a time based on the summer time 303 set in the own device, the electronic timepiece 100 may delay the timing of executing the reception operation when the summer time 303 is changed. Further, the display time 304 can be corrected to a time designated by the user, and the electronic timepiece 100 delays the timing of executing the reception operation when the display time 304 is corrected to the time designated by the user. Also good. The same applies when the leap second setting is changed.

  The timing based on the time notified to the user is, for example, a count value 305 that is incremented every time the time notified to the user reaches a predetermined time, and is initialized (reset) when the reception operation is executed. This is the timing when the counted value 305 reaches a predetermined value. In this case, the electronic timepiece 100 delays the execution timing of the reception operation by initializing the count value 305 when the display time 304 is corrected.

  The count value 305 may be subtracted (decremented) every time the time notified to the user reaches a predetermined time, and may be initialized (reset) when the reception operation is executed. As an example, the initial value of the count value 305 may be set to “6”, the predetermined value described above may be set to “0”, and the count value 305 may be decremented every time the display time 304 becomes a predetermined time.

  Further, for example, as shown in FIG. 7, the electronic timepiece 100 has a display time 304 that is a predetermined time, and correction information such as the time difference 302 and the daylight saving time 303 is displayed at the start of counting of the count value 305 at that time. If different from the correction information, the count value 305 may be initialized. This prevents the count value 305 from being reset when the time difference 302 or the like is switched back after the time difference 302 or the like is switched until the current display time 304 becomes the next predetermined time. It can suppress that the frequency of automatic reception falls unintentionally.

  Further, as shown in FIG. 8, for example, when the correction information such as the time difference 302 and the daylight saving time 303 is changed from the first information to the second information, the electronic timepiece 100 counts the first information and the count at that time. If the correspondence information with the value 305 is stored and the count value 305 is initialized, and then the correction information returns to the first information, the count value 305 may be set based on the correspondence information. For example, the electronic timepiece 100 sets the count value 305 to the past count value 305 associated with the first information in the correspondence information. As a result, when the time difference 302 or the daylight saving time 303 is switched back, the counting is resumed from the past count value 305 counted in the past for the time difference 302 or the daylight saving time 303, and the frequency of automatic reception is unintentionally lowered. Can be suppressed.

  Alternatively, the timing based on the time notified to the user may be, for example, a timing at which the difference between the current display time 304 and the display time 304 when the previous reception operation is performed reaches a predetermined value. . In this case, the electronic timepiece 100 delays the timing of execution of the reception operation by increasing the predetermined value when the display time 304 is corrected.

  The reception operation includes at least one of time reception, positioning reception, and leap second reception as described above, for example. However, the reception operation is not limited to these, and various operations can be performed in which the electronic timepiece 100 receives a predetermined radio wave. For example, the reception operation may be an operation of receiving a radio wave from a standard radio wave or an operation of receiving a signal transmitted wirelessly from another terminal by Bluetooth or the like. The receiving unit that receives the standard radio wave can be realized, for example, by the receiving circuit 220 and the antenna 150 shown in FIG. A receiving unit that receives a signal wirelessly transmitted by Bluetooth or the like can be realized by, for example, the communication interface 271 illustrated in FIG.

  The electronic timepiece 100 is not limited to the case where the display time 304 is corrected, and may reset the count value 305 when, for example, the remaining charge of the secondary battery 251 becomes a predetermined amount or less. Thereby, when the battery remaining amount is insufficient, the frequency of the reception operation can be lowered and the power consumption can be suppressed. Or you may comprise so that the frequency of a receiving operation may become low by changing the value of a predetermined value.

(Embodiment 2)
In the second embodiment, parts different from the first embodiment will be described. In the second embodiment, a configuration will be described in which the reception operation is executed at a timing when the current display time 304 has passed a predetermined time based on the display time 304 when the previous reception operation was executed.

(Execution processing of reception operation by electronic watch according to second embodiment)
FIG. 9 is a flowchart of an example of a receiving operation execution process by the electronic timepiece according to the second embodiment. The electronic timepiece 100 according to the second embodiment repeatedly executes, for example, each step illustrated in FIG. 9 as the execution process of the reception operation. Each step shown in FIG. 9 is executed by, for example, the control circuit 230 shown in FIG.

  Steps S901 to S904 shown in FIG. 9 are the same as steps S501 to S504 shown in FIG. If a reception operation is accepted in step S901 (step S901: Yes), or if the illuminance is greater than or equal to the threshold value in step S904 (step S904: Yes), the electronic timepiece 100 proceeds to step S905.

  That is, the electronic timepiece 100 sets the next reception time, for example, 144 hours after the current display time 304 (current display time + 144 hours) (step S905). The next reception time is a time at which the electronic timepiece 100 next performs automatic reception (automatic reception operation), and is stored in a memory (for example, RAM or ROM) of the electronic timepiece 100. However, since the electronic timepiece 100 executes the receiving operation in the immediately subsequent step S907, the next reception time at this time is the time when the electronic timepiece 100 automatically executes the receiving operation after the receiving operation in the immediately following step S907. . Note that 144 hours is a time when it is assumed that the reception operation is performed about once every six days as described above, and can be changed as appropriate.

  Step S906 and step S907 shown in FIG. 9 are the same as step S506 and step S507 shown in FIG. After step S907, the electronic timepiece 100 determines whether or not the reception by the reception operation of step S907 is successful (step S908). When the reception is not successful (step S908: No), the electronic timepiece 100 ends a series of processes.

  If reception is successful in step S908 (step S908: Yes), the internal time 301 may be corrected based on the successfully received satellite radio waves, and the display time 304 may be corrected accordingly. In this case, the electronic timepiece 100 sets the next reception time to 144 hours after the time that is the time taken for the reception operation in step S907 from the current display time 304 when the radio wave is received and the internal time 301 is corrected ( Current display time-time taken for reception operation + 144 hours) (step S909), and a series of processing ends. The time taken for the reception operation may be a fixed length time stored in the memory of the electronic timepiece 100 or may be a time actually measured by the electronic timepiece 100.

(Setting process of automatic reception permission flag by the electronic timepiece according to the second embodiment)
FIG. 10 is a flowchart illustrating an example of an automatic reception permission flag setting process by the electronic timepiece according to the second embodiment. The electronic timepiece 100 according to the second embodiment repeatedly executes, for example, the steps illustrated in FIG. 10 as the automatic reception permission flag setting process together with the reception operation execution process illustrated in FIG. 9. Each step shown in FIG. 10 is executed by, for example, the control circuit 230 shown in FIG.

  First, the electronic timepiece 100 determines whether or not the time difference 302 has been switched since the current next reception time was set (step S1001). For example, the electronic timepiece 100 stores flag information that becomes “true” when the time difference 302 is switched and becomes “false” when the next reception time is updated in a memory (for example, RAM or ROM). Whether or not switching has occurred can be performed based on the flag information.

  Alternatively, the electronic timepiece 100 may determine whether or not the time difference 302 has been switched based on the history information described above. Further, the electronic timepiece 100 stores the time difference 302 set when the next reception time is set in the memory, and determines whether or not the time difference 302 has been switched with the time difference 302 stored in the memory. You may carry out by comparing with the time difference 302 currently set.

  If the time difference 302 is not switched in step S1001 (step S1001: No), the electronic timepiece 100 determines whether or not the current display time 304 has passed the next reception time (step S1002).

  In step S1002, when the display time 304 has passed the next reception time (step S1002: Yes), the electronic timepiece 100 sets the above-described automatic reception permission flag to “true” (step S1003) and performs a series of processing. finish. When the display time 304 has not passed the next reception time (step S1002: No), the electronic timepiece 100 sets the above-described automatic reception permission flag to “false” (step S1004), and ends the series of processes.

  In step S1001, when the time difference 302 is switched (step S1001: Yes), the electronic timepiece 100 sets the next reception time to 24 hours after the current next reception time (next reception time + 24 hours) ( Step S1005) and the process proceeds to Step S1002. As a result, the next automatic reception is postponed for 24 hours.

  When the time difference 302 is switched by the process of setting the automatic reception permission flag shown in FIG. 10, the automatic reception can be postponed by delaying the next reception time. For this reason, it can suppress that the frequency of automatic reception becomes unintentionally high.

  FIG. 11 is a flowchart of another example of the automatic reception permission flag setting process by the electronic timepiece according to the second embodiment. The electronic timepiece 100 according to the second embodiment may repeatedly execute, for example, the steps illustrated in FIG. 11 as the automatic reception permission flag setting process together with the reception operation execution process illustrated in FIG. 9. Each step shown in FIG. 11 is executed by, for example, the control circuit 230 shown in FIG.

  Steps S1101 to S1105 shown in FIG. 11 are the same as steps S1001 to S1005 shown in FIG. However, in step S1105, the electronic timepiece 100 sets the next reception time to a time obtained by adding a time difference due to switching of the time difference 302 to the current next reception time (next reception time + time difference) (step S1105). The time difference due to the switching of the time difference 302 is the difference between the time difference with respect to the UTC of the time difference 302 before switching and the time difference with respect to the UTC of the time difference 302 after switching.

  For example, when the time difference 302 is switched from London (UTC + 0) to Paris (UTC + 1), the electronic timepiece 100 sets the next reception time one hour after the current reception time. When the time difference 302 is switched from Tokyo (UTC + 9) to London (UTC + 0), the electronic timepiece 100 sets the next reception time 9 hours before the current reception time.

  When the time difference 302 is switched by the process of setting the automatic reception permission flag shown in FIG. 11, automatic reception can be adjusted according to the time difference associated with the switching of the time difference 302. For this reason, the fluctuation | variation of the frequency of automatic reception can be suppressed.

  FIG. 12 is a flowchart illustrating still another example of the automatic reception permission flag setting process by the electronic timepiece according to the second embodiment. The electronic timepiece 100 according to the second embodiment may repeatedly execute, for example, each step illustrated in FIG. 12 as the automatic reception permission flag setting process together with the reception operation execution process illustrated in FIG. 9. Each step shown in FIG. 12 is executed by, for example, the control circuit 230 shown in FIG.

  Steps S1201 to S1205 shown in FIG. 12 are the same as steps S1001 to S1005 shown in FIG. After step S1205, the electronic timepiece 100 determines whether or not the current display time 304 has passed the next reception time (step S1206). When the display time 304 has not passed the next reception time (step S1206: No), the electronic timepiece 100 proceeds to step S1202.

  In step S1206, when the display time 304 has passed the next reception time (step S1206: Yes), automatic reception is immediately executed, for example, because the user manually advanced the display time 304. It can be judged. In this case, the electronic timepiece 100 sets the next reception time one hour after the current display time 304 (current display time + 1 hour) (step S1207), and proceeds to step S1202.

  With the automatic reception permission flag setting process shown in FIG. 12, for example, when positioning reception is included in automatic reception, automatic reception is immediately executed even if the user intentionally corrects the time difference 302, and the time difference 302 is received. It can be prevented that the data is returned or changed by the data. In addition to setting the reception start time based on the display time, this is also effective for a method of waiting for the scheduled reception time based on the UTC time that is not affected by the time difference.

  As described above, according to the electronic timepiece 100 according to the second embodiment, the display time 304 is received at a timing past the reception time (for example, the next reception time) based on the display time 304 when the previous reception operation is performed. When the operation is executed and the time notified to the user is corrected, the timing of executing the reception operation can be delayed by delaying the reception time. Thereby, it can suppress that the frequency of reception operation | movement becomes high unintentionally, and can suppress the increase in power consumption. For this reason, for example, a system down or a function restriction due to a decrease in battery voltage in the secondary battery 251 can be avoided.

  Further, for example, as shown in FIG. 11, when the correction information such as the time difference 302 and the daylight saving time 303 is changed, the electronic timepiece 100 sets the reception time according to the change in the display time 304 accompanying the change of the correction information. You may adjust. Thereby, the fluctuation | variation of the frequency of automatic reception can be suppressed.

  Further, as shown in FIG. 12, for example, the electronic timepiece 100 delays the reception time when the display time 304 is corrected, and sets the reception time to the current time when the display time 304 has passed the delayed reception time. It may be set to a time delayed by a predetermined time from the display time 304. As a result, although the user intentionally corrects the correction information such as the time difference 302 and the daylight saving time 303 and the display time 304, the reception operation is immediately executed, and the time difference 302, the summer time 303 and the display time 304 are changed by the reception operation. It can suppress returning.

  Moreover, in each embodiment mentioned above, although the structure which the electronic timepiece 100 is a wristwatch was demonstrated, it is not restricted to such a structure. For example, the electronic timepiece 100 may be a timepiece such as a pocket watch, a table clock, or a wall clock. In addition, although the configuration in which the electronic timepiece 100 is an analog timepiece that displays the time by the hands has been described, the configuration is not limited thereto. For example, the electronic timepiece 100 may be a digital clock that displays time on a display, or an audio clock that notifies time by voice.

  As described above, according to the electronic timepiece, an increase in power consumption can be suppressed.

  For example, conventionally, a radio timepiece that receives a radio signal including time information and corrects the internal time counted inside the timepiece is known. The types of radio signals include standard radio waves, satellite radio waves such as GPS, Bluetooth, and the like.

  In a small electronic timepiece such as a wristwatch, a space in which a battery can be placed is limited, and the circuit must be turned off. The reception operation of the radio timepiece described above is performed at intervals of, for example, several days because of high power consumption. For example, in an electronic timepiece with a monthly difference of ± 5 seconds, if the reception operation is performed once every six days, the time lag is within one second.

  For example, if the battery voltage drops below a predetermined value, the system may be down, and the value of the reception period is set based on the amount of power consumption so that the system does not go down. Here, some radio timepieces have a product with a world time function (time difference adjustment function). For example, there are watches that can change the time difference according to operations of a crown, a switch, a dial ring, and the like. For example, when the above-mentioned count goes over 0:00:00, or when counting up (or counting down) by periodically checking the calendar data (year / month / day), the count is unintentionally performed by changing the time difference. May go on. For example, when the time difference is frequently changed, the count proceeds unintentionally, and the next reception operation is performed earlier than expected. .

  On the other hand, according to each of the above-described embodiments, the reception operation is executed at the timing based on the time notified to the user, and the execution timing of the reception operation is delayed when the time notified to the user is corrected. be able to. Thereby, it can suppress that the frequency of reception operation | movement becomes high unintentionally, and can suppress the increase in power consumption. For this reason, the above-mentioned system down, a function restriction, etc. can be avoided, for example.

  As described above, the electronic timepiece according to the present invention is useful for an electronic timepiece that performs a receiving operation for receiving radio waves, and is particularly suitable for an electronic timepiece such as a wristwatch that requires a reduction in power consumption.

DESCRIPTION OF SYMBOLS 100 Electronic clock 101 Exterior case 110 Dial 121 Hour hand 122 Minute hand 123 Second hand 130 Operation part 131 Crown 132 First push button 133 Second push button 150 Antenna 160 Solar cell 220 Reception circuit 230 Control circuit 231 RTC
232 Arithmetic unit 233 Time difference setting unit 234 Counter 241 Motor drive circuit 242 Drive mechanism 243 Display unit 251 Secondary battery 252 Switch 271 Communication interface 301 Internal time 302 Time difference 303 Summer time 304 Display time 305 Count value

Claims (12)

A notification unit for notifying the user of the time;
A receiving unit that performs a receiving operation to receive a predetermined radio wave;
A control unit that causes the reception unit to execute the reception operation at a timing based on the time, and delays the timing when the time is corrected;
An electronic timepiece characterized by comprising: The time is a time based on correction information including at least one of a time difference and daylight saving time set in the device,
The control unit delays the timing when the correction information is changed;
The electronic timepiece according to claim 1. The time can be corrected to the time specified by the user,
The control unit delays the timing when the time is corrected to a time designated by a user.
The electronic timepiece according to claim 1 or 2, characterized in that The timing is a count value that is added or subtracted every time the time reaches a predetermined time, and is a timing at which the count value that is initialized when the reception operation is performed reaches a predetermined value.
The control unit delays the timing by initializing the count value when the time is corrected,
The electronic timepiece according to any one of claims 1 to 3, wherein: The time is a time based on correction information including at least one of a time difference and daylight saving time set in the device,
The control unit initializes the count value when the time is the predetermined time and the correction information is different from the correction information at the start of addition or subtraction of the count value.
The electronic timepiece according to claim 4. The time is a time based on correction information including at least one of a time difference and daylight saving time set in the device,
The control unit stores correspondence information between the first information and the count value when the correction information is changed from the first information to second information different from the first information, and stores the correspondence information between the first information and the count value. Initializing a count value, and setting the count value based on the correspondence information when the correction information returns to the first information;
The electronic timepiece according to claim 4 or 5, wherein The time is a time based on correction information including at least one of a time difference and daylight saving time set in the device,
The control unit stores the count value for each of the correction information, and performs the reception operation on the reception unit at a timing when the sum of the count values for each of the correction information reaches a value larger than the predetermined value. To execute,
The electronic timepiece according to any one of claims 4 to 6, wherein The timing is a timing at which a difference between the current time and the time when the previous reception operation is performed reaches a predetermined value,
The control unit delays the timing by increasing the predetermined value when the time is corrected,
The electronic timepiece according to any one of claims 1 to 3, wherein: The timing is a timing when the current time has passed the reception time based on the time when the previous reception operation was performed,
The control unit delays the timing by delaying the reception time when the time is corrected,
The electronic timepiece according to any one of claims 1 to 3, wherein: The time is a time based on correction information including at least one of a time difference and daylight saving time set in the device,
When the correction information is changed, the control unit adjusts the reception time according to a change in the time associated with the change in the correction information.
The electronic timepiece according to claim 9.   The control unit delays the reception time when the time is corrected, and sets the reception time to a time delayed by a predetermined time from the time when the received time is past the delayed reception time. The electronic timepiece according to claim 9 or 10, wherein: The time is a time based on the internal time of its own device,
The control unit corrects the internal time based on the predetermined radio wave received by the receiving unit;
The electronic timepiece according to claim 1, wherein:

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