EP3379347B1 - Procédé de réglage de la fréquence de marche d'une montre électronique - Google Patents

Procédé de réglage de la fréquence de marche d'une montre électronique Download PDF

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Publication number
EP3379347B1
EP3379347B1 EP17202602.3A EP17202602A EP3379347B1 EP 3379347 B1 EP3379347 B1 EP 3379347B1 EP 17202602 A EP17202602 A EP 17202602A EP 3379347 B1 EP3379347 B1 EP 3379347B1
Authority
EP
European Patent Office
Prior art keywords
electronic device
reference signal
signal
portable electronic
electronic watch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17202602.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3379347A1 (fr
Inventor
François Klopfenstein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ETA SA Manufacture Horlogere Suisse
Original Assignee
ETA SA Manufacture Horlogere Suisse
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from EP17161866.3A external-priority patent/EP3379346B1/fr
Priority claimed from EP17167994.7A external-priority patent/EP3396871A1/fr
Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to PCT/EP2018/056302 priority Critical patent/WO2018172147A1/fr
Priority to JP2019571778A priority patent/JP6858280B2/ja
Priority to US16/492,960 priority patent/US11874633B2/en
Priority to CN201880019442.7A priority patent/CN110462528B/zh
Priority to KR1020197027499A priority patent/KR102277882B1/ko
Publication of EP3379347A1 publication Critical patent/EP3379347A1/fr
Publication of EP3379347B1 publication Critical patent/EP3379347B1/fr
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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G5/00—Setting, i.e. correcting or changing, the time-indication
    • G04G5/02—Setting, i.e. correcting or changing, the time-indication by temporarily changing the number of pulses per unit time, e.g. quick-feed method
    • G04G5/027—Setting, i.e. correcting or changing, the time-indication by temporarily changing the number of pulses per unit time, e.g. quick-feed method by adding or suppressing individual pulses, e.g. for step-motor
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D7/00—Measuring, counting, calibrating, testing or regulating apparatus
    • G04D7/12—Timing devices for clocks or watches for comparing the rate of the oscillating member with a standard

Definitions

  • the present invention relates to the field of electronic watches.
  • the invention relates more particularly to a method for adjusting the running frequency or timing of an electronic watch, in particular an electronic watch equipped with a quartz oscillator.
  • Electronic watch movements generally include a time base providing a time signal and a display module receiving this time signal, which is formed by timing pulses.
  • the time base includes a clock circuit and a frequency divider circuit.
  • the clock circuit is formed by a quartz oscillator which supplies a clock signal to the frequency divider circuit, this clock signal having a determined clock frequency.
  • the frequency divider circuit is formed by a chain of dividers which outputs a time signal formed by timing pulses.
  • the timing signal generally has a frequency of 1 Hz so that the seconds hand is actuated by a stepping motor at the rate of the seconds, i.e. - say in an arc of an angle of 6 ° every second.
  • the present invention therefore aims to provide a method of adjusting the operating frequency of an electronic watch which has the advantage of eliminating specialized measurement and programming equipment and the implementation of which is greatly facilitated.
  • the method makes it possible to correct the operating frequency of the electronic watch by inhibiting one or more pulses emitted by the frequency divider circuit as a function of the corrected inhibition value.
  • the expression "correcting the inhibition value” means replacing the inhibition value in the memory of the frequency adjustment circuit with a new value, or correcting the inhibition value by the application of an offset.
  • modulated optical signal means a sequence of light pulses the durations and spacings of which may vary as a function of the information coded by the signal.
  • each light pulse can represent a bit of value "1” and each absence of light pulse a bit of value "0", so that the modulated optical signal can encode a digital value, for example 32-bit example, representative of a reference value used to replace or correct the inhibition value.
  • the method may include the additional features set out in dependent claims 2-11.
  • the electronic watch 10 is configured to communicate with a portable electronic device 12, for example a smartphone or tablet.
  • the portable electronic device 12 is configured to transmit a modulated optical signal to the electronic watch 10 in order to allow adjustment of the running frequency of the watch.
  • the electronic watch 10 comprises a dial 11 comprising an opening 15 or a part transparent to optical waves.
  • An optical sensor 16, for example a photodiode or a phototransistor, is disposed in the opening or under the transparent part 15. According to a variant not shown, the optical sensor 16 can be integrated into the middle part 14 of the electronic watch 10, in particular if said middle part 14 is made of transparent plastic.
  • the optical sensor 16 can be arranged bottom side of the watch case of the type with transparent case back so as to be visible for example through a sapphire crystal.
  • the electronic watch 10 further comprises time display means 18 of the analog type, comprising hands driven by a stepping motor (not shown).
  • the time display means can be of the digital type.
  • the electronic watch is equipped with an electronic module 20 comprising a microcontroller 21, a supply unit 22, for example a battery or a battery, making it possible to supply the microcontroller 21, as well as a timing unit 24 of the operating frequency of the electronic watch.
  • This timing unit 24 comprises an oscillator 26, for example a quartz oscillator, which supplies a clock signal S2 formed by pulses generated at a determined clock frequency, and a frequency divider circuit 28 arranged downstream of the oscillator 26 which receives at a first input the clock pulses of the clock signal S2 and which outputs a pulsed signal S1 at the operating frequency of the electronic watch.
  • the electronic module 20 further comprises a communication unit 30 comprising in particular the optical sensor 16 connected to the microcontroller 21, as well as an adjustment circuit 32 of the operating frequency of the electronic watch.
  • the adjustment circuit 32 includes a memory 33, for example of the RAM, EEPROM or Flash type, configured to store in an appropriate register an inhibition value.
  • the adjustment circuit 32 supplies an inhibition signal S3 to a second input of the frequency divider circuit 28.
  • the latter is connected to the adjustment circuit 24 in order to transmit to it a control signal S4, on the one hand, for synchronize the adjustment circuit 32 with the timing unit 24 of the operating frequency of the electronic watch and, on the other hand, for the management of the periodic sending of the inhibition signal.
  • the adjustment circuit 32 acts preferentially at the input of the second stage of the frequency divider circuit 28, where the frequency of the signal is, for example, at a frequency close to 16 kHz for a 32 kHz quartz oscillator. For example, a programmed number of pulses from the second stage of the frequency divider circuit 28 is deleted every 60 seconds.
  • the portable electronic device 12 in particular comprises a light source 35, for example one or more light-emitting diodes normally used as a flash for a camera.
  • the electronic device 12 also includes a touch screen 36 and a microcontroller (not shown).
  • the electronic device 12 also includes a computer application for adjusting the operating frequency of the electronic watch 10. This computer application can be downloaded from an IT service and is compatible in particular with the operating system IOS® and Android®.
  • the microcontroller of the portable electronic device 12 executes a sequence of instructions in order to carry out the following steps: i) generate in the portable electronic device 12 a pulsed signal reference representative of a reference value; ii) converting the reference pulsed signal into a modulated optical signal; then iii) transmit the optical signal modulated by the light source 35 to the optical sensor 16 of the electronic watch 10, by placing the watch and the electronic device opposite and at a short distance from each other, see one against the other.
  • the deviation of the operating frequency of the electronic watch (or operating error) relative to a reference clock has previously been determined by measurement equipment dedicated to this purpose, sold in particular by the company Witschi Electronic SA.
  • This equipment is capable of estimating the deviation of the walking frequency (or walking error) during a determined period compared to to a reference clock.
  • the running frequency could be determined for example by measuring the flanks between the first and third pulses of the stepping motor over a period of two seconds by an inductive sensor of the measuring equipment.
  • the deviation of the operating frequency of the electronic watch could alternatively be determined directly by the user of the watch by periodically comparing the time displayed by the electronic watch with a reference clock. The adjustment of the operating frequency will however be less precise. From the estimated deviation, the previously mentioned inhibition value could be calculated and entered into memory 33.
  • the screen 36 of the portable electronic device 12 has an interface configured to allow the entry of a numerical value when the computer application is operational.
  • the digital value corresponds to a new value for deviation from the operating frequency, intended to replace or correct the inhibition value written in memory 33.
  • This digital value can be expressed for example in a format corresponding to a number of seconds per year, per month or per day.
  • the computer application is configured to control the light source 35 of the portable electronic device 12 in order to transmit to the electronic watch 10 a modulated optical signal representative of the digital value.
  • This numerical value is a signed number in order to take into account a positive or negative deviation of the running frequency, that is to say if the time indicated by the electronic watch is early or late compared to a clock reference.
  • the user / wearer of the electronic watch 10 configures it in an adjustment mode for example by actuating a push-button, by pivoting the bezel or the crown of the watch in order whether it is in a certain angular position, or by a single press or by a sequence of presses on the crown.
  • the user / wearer of the watch positions the light source 35 of the portable electronic device 12 near the opening or the transparent part 15 arranged on the watch case 14 so that the optical sensor 16 can directly receive and receive the light signals emitted by the light source 35.
  • the transmission of the modulated optical signal to the optical sensor 16 is then started by interacting with the interface of the portable electronic device 12, for example by pressing on a specific zone of the touch screen 36.
  • the optical sensor 16 of the watch receives a sequence of light pulses.
  • the microcontroller 21 analyzes whether the transmitted data is decipherable and then sends a signal to a light emitter 41 (an indicator light) making it possible to indicate to the user whether the entire modulated optical signal emitted by the light source 35 has been transmitted.
  • the indicator may be a light emitting diode capable of diffusing a green color and a red color in order to indicate to the user / wearer of the watch whether the transmission has been carried out successfully (green indicator) or if an error has occurred. during transmission (red light).
  • indicating a successful transmission or a transmission error can be implemented, for example by rotating one or more hands of the time display. according to a first and a second sequence according to the state of the transmission (successful transmission or error during the transmission) or by displaying an alphanumeric character or a symbol indicative of the state of the transmission by means of a LCD or OLED type display arranged for example on a part of the dial of the electronic watch.
  • the microcontroller 21 of the watch is capable of reconstructing the digital value corresponding to the new deviation of the running frequency.
  • the microcontroller 21 then goes determine an inhibition value as a function of the reconstituted digital value, then replace the initial inhibition value with this new inhibition value in the memory 33 of the adjustment circuit 32 of the operating frequency.
  • the adjustment circuit 32 will then inhibit one or more pulses from the second stage of the frequency divider circuit 28 in order to correct the operating frequency so that it is as close as possible to that desired.
  • the calculation for determining the inhibition value as a function of the deviation of the operating frequency (or operating error) desired can be carried out by the microcontroller of the portable electronic device 12, before sending of the light sequence.
  • the microcontroller of the portable electronic device : i) generates a pulsed signal representative of the calculated inhibition value; ii) converts the pulsed signal into a corresponding optical pulse sequence, then iii) transmits the optical signal modulated by the light source to the optical sensor 16 of the electronic watch 10.
  • the microcontroller 21 of the electronic watch 10 will then reconstitute the value inhibition then write this inhibition value in the appropriate register of the memory 33 of the adjustment circuit 32.
  • optical sensor 16 is advantageously deactivated once the modulated optical signal has been successfully transmitted from the portable electronic device 12 to the electronic watch 10, preferably automatically after the expiration of a certain period of time. timeout to avoid unnecessary consumption of the power unit 22.
  • the portable electronic device 12 includes a real-time clock 40 whose frequency has been previously synchronized with the frequency of a clock from an external propagating source. UTC coordinated universal time.
  • the electronic watch 10 also includes a real time clock 40.
  • the computer application is configured to generate in the portable electronic device 12 a pulsed reference signal representative of time. universal UTC.
  • the microcontroller 21 of the electronic watch 10 is configured, according to this embodiment, to successively: i) reconstruct the digital value of the UTC time; b) comparing said digital value with a digital value of the real time clock 40 of the electronic watch 10; then c) correct the initial inhibition value stored in the memory 33 as a function of this comparison.
  • the synchronization of the clock 40 of the portable electronic device 12 with the clock of the external source propagating the UTC time is for example carried out by means of an NTP network time protocol whose synchronization with the time Actual UTC is ensured with a typical uncertainty of a few milliseconds, or a few tens of milliseconds.
  • the portable electronic device 12 further includes a satellite positioning system (GNSS) of the GPS or Galileo type. Synchronization of the real time clock 40 of the portable electronic device 12 with the frequency of the clock of the external source propagating the UTC time can then be carried out via GNSS.
  • GNSS satellite positioning system
  • the method consisting in comparing the UTC time with the real time clock 40 of the electronic watch 10 is independent of a setting of the time made by the user / wearer of the electronic watch.
  • the real time clock 40 corresponds to the UTC time while the timing unit 24 is connected to the time display for example by driving the hands of an analog display by exciting the coils of the stepping motor -not with the signal S1 generated at the output of the frequency divider circuit 28.
  • the electronic module 20 of the electronic watch 10 is configured to display and / or transmit to the portable electronic device 12 or to a remote server (not shown) a signal representative of a so-called differential digital value corresponding to the difference between the frequency of the real time clock of the electronic watch 10 before correction and the frequency of the clock of the external source.
  • the computer application of the portable electronic device 12 is capable, when it is operational, of acquiring the differential value displayed and / or sent by the electronic watch 10 by means of a camera, a microphone or '' an optical sensor (not shown) fitted to the portable electronic device 12.
  • the differential value is then stored in a memory of the portable electronic device 12 or in a memory of the server.
  • a new differential value is sent and stored in the memory of the portable electronic device or of the server at each iteration of the method of adjusting the operating frequency according to the invention.
  • the different differential values are then compared with each other. This comparison makes it possible to predict the frequency variation of the oscillator over time, for example by modeling according to a logarithmic function, in order to be able to determine a digital correction value which takes into account the frequency variations due to the aging of the oscillator during a subsequent correction of the operating frequency according to the method of the invention.
  • the electronic module of the watch may include a thermal correction system 60 of the gait, making it possible to compensate for the influence of the temperature on the quartz oscillator.
  • the memory 33 includes, in addition to the inhibition value, one or more thermal correction parameters. This or these parameters are used to calculate periodically, for example every four minutes, a value inhibition as a function of temperature, so as to adjust the operating frequency more finely. The method of adjusting the operating frequency can then make it possible to send, from the electronic device to the electronic watch, corrected thermal correction parameters, within the modulated optical signal. These corrected thermal correction parameters will then replace the old thermal correction parameters recorded in memory 33.
  • the transmission of a modulated optical signal from the portable electronic device can be done not by one or more light-emitting diodes normally used as a flash but by a modulation of the light emitted by the screen of the device.
  • portable electronics can be done not by one or more light-emitting diodes normally used as a flash but by a modulation of the light emitted by the screen of the device.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
EP17202602.3A 2017-03-20 2017-11-20 Procédé de réglage de la fréquence de marche d'une montre électronique Active EP3379347B1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020197027499A KR102277882B1 (ko) 2017-03-20 2018-03-13 전자 시계의 동작 주파수를 설정하는 방법
PCT/EP2018/056302 WO2018172147A1 (fr) 2017-03-20 2018-03-13 Procédé de réglage de la fréquence de marche d'une montre électronique
JP2019571778A JP6858280B2 (ja) 2017-03-20 2018-03-13 電子時計の動作周波数を調節する方法
US16/492,960 US11874633B2 (en) 2017-03-20 2018-03-13 Method for adjusting the operating frequency of an electronic watch
CN201880019442.7A CN110462528B (zh) 2017-03-20 2018-03-13 用于调节电子手表的工作频率的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17161866.3A EP3379346B1 (fr) 2017-03-20 2017-03-20 Procede de réglage d'une montre a quartz
EP17167994.7A EP3396871A1 (fr) 2017-04-25 2017-04-25 Procede de transmission de donnees d'un appareil electronique vers un dispositif electronique

Publications (2)

Publication Number Publication Date
EP3379347A1 EP3379347A1 (fr) 2018-09-26
EP3379347B1 true EP3379347B1 (fr) 2020-01-01

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Application Number Title Priority Date Filing Date
EP17202602.3A Active EP3379347B1 (fr) 2017-03-20 2017-11-20 Procédé de réglage de la fréquence de marche d'une montre électronique

Country Status (6)

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US (1) US11874633B2 (ja)
EP (1) EP3379347B1 (ja)
JP (1) JP6858280B2 (ja)
KR (1) KR102277882B1 (ja)
CN (1) CN110462528B (ja)
WO (1) WO2018172147A1 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3379346B1 (fr) * 2017-03-20 2022-08-03 ETA SA Manufacture Horlogère Suisse Procede de réglage d'une montre a quartz
JP6798470B2 (ja) * 2017-11-08 2020-12-09 カシオ計算機株式会社 電子時計、表示制御方法、及びプログラム
EP3779612A1 (fr) * 2019-08-16 2021-02-17 The Swatch Group Research and Development Ltd Procédé et système de diffusion d'un message à un porteur d'une montre
EP3842876A1 (fr) 2019-12-24 2021-06-30 The Swatch Group Research and Development Ltd Piece d horlogerie munie d'un mouvement mecanique et d'un dispositif de correction d'une heure affichee
EP3926418A1 (fr) * 2020-06-18 2021-12-22 ETA SA Manufacture Horlogère Suisse Correction automatique de l'heure et/ou de la date
DE102021116557A1 (de) * 2021-06-25 2022-12-29 Realization Desal Ag Uhr

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Also Published As

Publication number Publication date
US20200019127A1 (en) 2020-01-16
CN110462528A (zh) 2019-11-15
JP6858280B2 (ja) 2021-04-14
KR20190117699A (ko) 2019-10-16
WO2018172147A1 (fr) 2018-09-27
KR102277882B1 (ko) 2021-07-15
EP3379347A1 (fr) 2018-09-26
CN110462528B (zh) 2021-03-26
JP2020510224A (ja) 2020-04-02
US11874633B2 (en) 2024-01-16

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