EP0657793A1 - Montre électronique corrigée par radio - Google Patents

Montre électronique corrigée par radio Download PDF

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Publication number
EP0657793A1
EP0657793A1 EP19940117552 EP94117552A EP0657793A1 EP 0657793 A1 EP0657793 A1 EP 0657793A1 EP 19940117552 EP19940117552 EP 19940117552 EP 94117552 A EP94117552 A EP 94117552A EP 0657793 A1 EP0657793 A1 EP 0657793A1
Authority
EP
European Patent Office
Prior art keywords
circuit
receiving
output signal
timing
basis
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.)
Withdrawn
Application number
EP19940117552
Other languages
German (de)
English (en)
Inventor
Toshiyuki C/O Seiko Instruments Yuzuki
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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
Application filed by Seiko Instruments Inc filed Critical Seiko Instruments Inc
Publication of EP0657793A1 publication Critical patent/EP0657793A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
    • G04G19/12—Arrangements for reducing power consumption during storage
    • G—PHYSICS
    • G04—HOROLOGY
    • G04R—RADIO-CONTROLLED TIME-PIECES
    • G04R20/00—Setting the time according to the time information carried or implied by the radio signal
    • G04R20/08—Setting the time according to the time information carried or implied by the radio signal the radio signal being broadcast from a long-wave call sign, e.g. DCF77, JJY40, JJY60, MSF60 or WWVB

Definitions

  • the present invention relates to a radio-corrected electronic timepiece which is designed so that the current consumption is reduced, and accurate time is obtained.
  • Fig. 3 is a system block diagram of a conventional electronic timepiece.
  • a received time comparing circuit 306 is supplied with an output signal from a timing signal calculating circuit 301, which arithmetically processes timing and other information, and an output signal from a received time memory circuit 305 previously stored with predetermined time (time at which receiving is to be started), and makes a comparison to judge whether or not timing data obtained from the timing signal calculating circuit 301 matches timing data stored in the received time memory circuit 305.
  • a receiving means 302 is activated.
  • the receiving means 302 is normally in a receiving stop state, but when brought into a receiving start state, it receives an externally transmitted standard timing signal, judges whether or not the received data has predetermined information and outputs a signal to a transmitting circuit 303 that outputs a correction pulse to the timing signal calculating circuit 301.
  • a displaying means 304 is supplied with an output signal from the timing signal calculating circuit 301 and displays timing and other information.
  • the conventional radio-corrected electronic timepiece performs receiving until a power source, e.g., a battery, becomes dead regardless of whether or not the user carries (uses) it.
  • a power source e.g., a battery
  • an object of the present invention is to provide an electronic timepiece arranged such that whether or not the user carries (uses) the electronic timepiece is detected, and when the user does not carry (use) it, the timepiece is inhibited from receiving; in the case of a digital timepiece, an LCD or the like is turned off to place the timepiece into a power save state, thereby extending the battery lifetime. It is another object of the present invention to provide a radio-corrected electronic timepiece which is compellingly placed into a receiving state when it is detected that the timepiece has been brought into a carried (used) state from a non-carried (unused) state, thereby enabling the timepiece to display accurate time.
  • the present invention provides a radio-corrected electronic timepiece comprising: detecting means for detecting whether or not the timepiece is in use on the basis of an output signal from a timing signal calculating circuit; a movement control calculating circuit for arithmetically processing output signals from the detecting means and switching means; a calculated result memory circuit for storing an output signal from the movement control calculating circuit; a stock condition memory circuit for storing conditions under which operations of receiving means and so forth are stopped; a comparing circuit for making a comparison between an output signal from the calculated result memory circuit and an output signal from the stock condition memory circuit; a receiving start judging circuit for judging whether or not the receiving means should be started on the basis of an output signal from a received time comparing circuit and an output signal from the comparing circuit and for outputting a result of the judgment to the receiving means; and display switching means for receiving the output signals from the timing signal calculating circuit and the comparing circuit and for judging whether or not the output signal from the timing signal calculating circuit should be outputted
  • the present invention provides a radio-corrected electronic timepiece comprising: detecting means for detecting whether or not the timepiece is in use on the basis of an output signal from a timing signal calculating circuit; a movement control calculating circuit for arithmetically processing output signals from the detecting means and switching means; a calculated result memory circuit for storing an output signal from the movement control calculating circuit; a stock condition memory circuit for storing conditions under which operations of receiving means and so forth are stopped; a comparing circuit for making a comparison between an output signal from the calculated result memory circuit and an output signal from the stock condition memory circuit; a receiving start judging circuit for judging whether or not the receiving means should be started on the basis of an output signal from received time comparing circuit and an output signal from the comparing circuit and for outputting a result of the judgment to the receiving means; a compelled receiving start circuit for activating the receiving means when an output signal from the comparing circuit changes from a match state to a mismatch state; and display switching means for receiving the output signals from the timing signal
  • Fig. 1 is a system block diagram showing one example of a typical arrangement of the radio-corrected electronic timepiece according to the present invention.
  • a timing signal calculating circuit 101 arithmetically processes timing and other information.
  • a detecting means 102 is supplied with an output signal from the timing signal calculating circuit 101 and activates a photo sensor, a temperature sensor or other circuit to detect whether or not the timepiece is in use.
  • a switching means 103 judges whether or not an external operating member has been activated.
  • a movement control calculating circuit 104 arithmetically processes output signals from the detecting means 102 and switching means 103.
  • a calculated result memory circuit 105 stores an output signal from the movement control calculating circuit 104.
  • a stock condition memory circuit 106 stores conditions under which the timepiece is placed into a power save mode in which, for example, the display is turned off, or receiving is inhibited,
  • a comparing circuit 107 makes a comparison between an output signal from the calculated result memory circuit 105 and an output signal from the stock condition memory circuit 106.
  • a receiving means 111 is normally in a receiving stop state, but when brought into a receiving start state, it receives an externally transmitted standard timing signal, and judges whether or not the received data has predetermined information.
  • a transmitting circuit 112 receives an output signal from the receiving means 111 and outputs a correction pulse to the timing signal calculating circuit 101.
  • a received time memory circuit 113 stores predetermined time (time at which receiving is to be started).
  • a received time comparing circuit 114 makes a comparison between an output signal from the timing signal calculating circuit 101 and an output signal from the received time memory circuit 113.
  • a receiving start judging circuit 110 judges whether or not the receiving means 111 should be started on the basis of output signals from the received time comparing circuit 114 and the comparing circuit 107, and outputs a result of the judgment to the receiving means 111.
  • a display switching means 108 receives the output signals from the timing signal calculating circuit 101 and the comparing circuit 107 and judges whether or not the output signal from the timing signal calculating circuit 101 should be outputted to a displaying means 109 for displaying timing and other information on the basis of a result of the comparison made by the comparing circuit 107.
  • Fig. 2 is a system block diagram showing another example of a typical arrangement of the radio-corrected electronic timepiece according to the present invention.
  • a timing signal calculating circuit 201 arithmetically processes timing and other information.
  • a detecting means 202 is supplied with an output signal from the timing signal calculating circuit 201 and activates a photo sensor, a temperature sensor or other circuit to detect whether or not the timepiece is in use.
  • a switching means 203 judges whether or not an external operating member has been activated.
  • a movement control calculating circuit 204 arithmetically processes output signals from the detecting means 202 and switching means 203.
  • a calculated result memory circuit 205 stores an output signal from the movement control calculating circuit 204.
  • a stock condition memory circuit 206 stores conditions under which the timepiece is placed into a power save mode in which, for example, the display is turned off, or receiving is inhibited,
  • a comparing circuit 207 makes a comparison between an output signal from the calculated result memory circuit 205 and an output signal from the stock condition memory circuit 206.
  • a receiving means 211 is normally in a receiving stop state, but when brought into a receiving start state, it receives an externally transmitted standard timing signal, and judges whether or not the received data has predetermined information.
  • a transmitting circuit 212 receives an output signal from the receiving means 211 and outputs a correction pulse to the timing signal calculating circuit 201.
  • a received time memory circuit 213 stores predetermined time (time at which receiving is to be started).
  • a received time comparing circuit 214 makes a comparison between an output signal from the timing signal calculating circuit 201 and an output signal from the received time memory circuit 213.
  • a receiving start judging circuit 210 judges whether or not the receiving means 211 should be started on the basis of output signals from the received time comparing circuit 214 and the comparing circuit 207, and outputs a result of the judgment to the receiving means 211.
  • a compelled receiving start circuit 215 activates the receiving means 211 when an output signal from the comparing circuit 207 changes from a match state to a mismatch state.
  • a display switching means 208 receives the output signals from the timing signal calculating circuit 201 and the comparing circuit 207 and judges whether or not the output signal from the timing signal calculating circuit 201 should be outputted to a displaying means 209 for displaying timing and other information on the basis of a result of the comparison made by the comparing circuit 207.
  • the radio-corrected electronic timepiece of the present invention judges whether or not the user is actually carrying (using) the timepiece, and controls the receiving circuit or display according to a result of the judgment, thereby enabling the current consumption to be reduced.
  • the timepiece is compellingly placed into a receiving state at once, thereby allowing the timepiece to display accurate time.
  • Fig. 1 is a system block diagram showing one example of a typical arrangement of the radio-corrected electronic timepiece according to the present invention.
  • Fig. 2 is a system block diagram showing another example of a typical arrangement of the radio-corrected electronic timepiece according to the present invention.
  • Fig. 3 is a functional block diagram of a conventional radio-corrected electronic timepiece.
  • Fig. 4 is a detailed block diagram showing a receiving start judging circuit and a stock condition comparing circuit, together with peripheral circuits thereof, in a first embodiment of the radio-corrected electronic timepiece according to the present invention.
  • Fig. 5 is a flowchart schematically showing operations of a received time comparing circuit, stock condition comparing circuit and receiving start judging circuit in the first embodiment of the radio-corrected electronic timepiece according to the present invention.
  • Fig. 6 is a detailed timing chart of receiving start processing and LCD display ON/OFF control, which are executed when the timepiece is brought into a stock condition from a non-stock condition in the first embodiment of the radio-corrected electronic timepiece according to the present invention.
  • Fig. 7 is a detailed block diagram showing a compelled receiving start circuit, a receiving start judging circuit and a stock condition comparing circuit, together with peripheral circuits thereof, which are arranged to compel the timepiece to perform receiving when it returns to a normal condition from a stock condition in a second embodiment of the radio-corrected electronic timepiece according to the present invention.
  • Fig. 8 is a flowchart schematically showing stock condition setting and canceling processing in the second embodiment of the radio-corrected electronic timepiece according to the present invention.
  • Fig. 9 is a detailed timing chart of receiving start processing and LCD display ON/OFF control, which accompany the stock condition setting and canceling processing, in the second embodiment of the radio-corrected electronic timepiece according to the present invention.
  • Figs. 4, 5 and 6 relate to a radio-corrected electronic timepiece according to the present invention arranged such that when the timepiece is found to be in such conditions that it has been impossible to detect light for 10 days and the external switch has not been pressed for 10 days (i.e., stock condition), the LCD display is turned off, and the timepiece is inhibited from performing receiving, which is carried out at 2 o'clock every day.
  • Fig. 4 is a detailed block diagram of an arrangement for ON/OFF controlling the LCD display and judging whether or not the receiving circuit should be activated according to whether or not the timepiece is in the stock condition.
  • a received time memory circuit 401 which is comprised of a ROM, stores data "2 o'clock 00 minute”.
  • a received time comparing circuit 403 makes a comparison to judge whether or not the data stored in the received time memory circuit 401 and the data of a timing signal counter 402 match each other. As long as the two pieces of data match each other, a HIGH signal is outputted.
  • a stock condition memory circuit 404 which is comprised of a ROM, has previously been stored with data "10 days".
  • a movement control calculating circuit 407 resets calculation data when an external switch 405 is pressed, or a photo sensor 406 detects light. When the date has changed without the external switch 405 being pressed and without the photo sensor 406 detecting light, the movement control calculating circuit 407 adds "1" to the calculation data.
  • a calculated result memory circuit 408 stores the data calculated by the movement control calculating circuit 407.
  • a stock condition comparing circuit 409 makes a comparison to judge whether or not the data stored in the stock condition memory circuit 404 and the data of the calculated result memory circuit 408 match each other. As long as the two pieces of data match each other, a HIGH signal is outputted.
  • a receiving start judging circuit 410 is comprised of a 2-input AND gate 410a which is supplied at one input end thereof with an output signal from the received time comparing circuit 403 and which is supplied at another input end thereof with an output signal from the stock condition comparing circuit 409 through an inverter 410b.
  • a receiving circuit 411 is supplied with an output signal from the receiving start judging circuit 410 as an input signal. When it is detected that the input signal has risen from LOW to HIGH, the receiving circuit 411 is activated.
  • An LCD ON/OFF switching circuit 412 is supplied with an output signal from the stock condition comparing circuit 409 as an input signal.
  • the switching circuit 412 turns on the LCD display (i.e., timing information display state), whereas, when the input signal is HIGH, the switching circuit 412 turns off the LCD display.
  • Fig. 5 is a flowchart schematically showing the operations of the received time comparing circuit 403, the stock condition comparing circuit 409 and the receiving start judging circuit 403. It is judged by the stock condition comparing circuit 409 whether or not the timepiece is in such conditions that no switch input has been available and no light has been detected for 10 days (i.e., stock condition) (Step 501). When it is judged that the timepiece is in the stock condition, the LCD display is turned off, and the process is terminated without making judgment for receiving start conditions (Step 502).
  • the LCD display is turned on (Step 503), and it is judged by the received time comparing circuit 403 whether or not it is 2 o'clock 00 minute (Step 504). When it is not 2 o'clock 00 minute, the process is terminated as it is. When it is 2 o'clock 00 minute, receiving start processing is executed, and then the process is terminated (Step 505).
  • Fig. 6 is a detailed timing chart of the receiving start processing and the LCD display ON/OFF control, which are executed when the timepiece is brought into a stock condition (i.e., conditions where no switch input is available and no light is detected for 10 days) from a non- stock condition.
  • a stock condition i.e., conditions where no switch input is available and no light is detected for 10 days
  • the movement control calculating circuit 407 is assumed to be adapted to add "1" to the calculation data when the date has changed.
  • the output signal A from the received time memory circuit 401 has data indicating "2 o'clock 00 minute".
  • the received time comparing circuit 403 is supplied with the signals A and B as input signals. When the signals A and B match each other (i.e., 2 o'clock 00 minute), the output signal E from the received time comparing circuit 403 becomes HIGH.
  • the output signal C from the stock condition memory circuit 404 has data indicating a given number of days (e.g., 10 days) by which a stock condition judgment is made.
  • the stock condition comparing circuit 409 is supplied with the signals C and D as input signals. When the signals C and D match each other (i.e., when conditions of stock condition are satisfied), the output signals F and H of the stock condition comparing circuit 409 become HIGH.
  • the signals C and D do not match (i.e., the timepiece is not in the stock condition). Therefore, a receiving start pulse is outputted in the form of the signal G, and the LCD display remains in a normal state. If the next day comes without any switch input and without light being detected thereafter, the signals C and D match each other (i.e., the stock condition). Accordingly, the signals F and H become HIGH, and the LCD display is turned off. When it is 2 o'clock 00 minute on that day, the signals A and B match each other. However, since the signal F outputted from the stock condition comparing circuit 409 is HIGH, the signal G outputted from the 2-input AND gate 410a is LOW. Therefore, the timepiece is inhibited from starting receiving. This state continues until either a switch input or light is detected.
  • Figs. 7, 8 and 9 relate to a radio-corrected electronic timepiece obtained by modifying the first embodiment of the present invention such that the timepiece is compelled to perform receiving when it returns to the normal condition from the stock condition (where no receiving is permitted and the LCD is off).
  • Fig. 7 is a detailed block diagram showing a compelled receiving start circuit, a receiving start judging circuit and a stock condition comparing circuit, together with peripheral circuits thereof, which are arranged to compel the timepiece to perform receiving when it returns to the normal condition from the stock condition.
  • the arrangement is the same as that described in connection with Fig. 4 with regard to the receiving start judging circuit, the stock condition comparing circuit and their peripheral circuits.
  • the compelled receiving start circuit 713 is supplied with an output signal from the stock condition comparing circuit 709 as an input signal. When the input signal changes from HIGH to LOW, the compelled receiving start circuit 713 outputs a compelled receiving start pulse to the receiving circuit 711.
  • Fig. 8 is a flowchart schematically showing stock condition setting and canceling processing. Processing executed when neither switch input nor light has been detected is the same as that described in connection with Fig. 5.
  • a switch input is available (Step 801) or light is detected (Step 802)
  • data used to calculate a number of days for which neither switch input nor light has been detected is reset (Step 803), and the LCD display is turned on (Step 804).
  • Step 805 it is judged whether or not the timepiece was in the stock condition when the switch input or light was detected.
  • the processing carried out at and after Step 504, described in connection with Fig. 5 is executed, whereas, when it is judged that the timepiece was in the stock condition, receiving is immediately started.
  • Fig. 9 is a detailed timing chart of the receiving start processing and the LCD display ON/OFF control, which accompany the stock condition setting and canceling processing.
  • the timing chart of the receiving start processing the LCD display ON/OFF control which are executed when the timepiece is brought into a stock condition from a non-stock condition, is the same as that described in connection with Fig. 6.
  • the output signals F, H and I from the stock condition comparing circuit 709 become LOW.
  • the compelled receiving start circuit 713 detects a fall of the input signal I, it outputs a receiving start pulse signal J to the receiving circuit 711.
  • the radio-corrected electronic timepiece of the present invention has a detecting means for detecting whether or not the timepiece is in use on the basis of an output signal from a timing signal calculating circuit, a stock condition memory circuit for storing conditions under which the receiving means is inhibited, and a receiving start judging circuit for judging whether or not a receiving means should be started and for outputting a result of the judgment to the receiving means.
  • the radio-corrected electronic timepiece of the present invention may have a compelled receiving start circuit that activates the receiving means on the basis of an output signal from the detecting means, in addition to the above-described arrangement.
  • the present invention has the following advantageous effects:
EP19940117552 1993-12-10 1994-11-07 Montre électronique corrigée par radio Withdrawn EP0657793A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP31034993A JP3313215B2 (ja) 1993-12-10 1993-12-10 電波修正型電子時計
JP310349/93 1993-12-10

Publications (1)

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EP0657793A1 true EP0657793A1 (fr) 1995-06-14

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EP19940117552 Withdrawn EP0657793A1 (fr) 1993-12-10 1994-11-07 Montre électronique corrigée par radio

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EP (1) EP0657793A1 (fr)
JP (1) JP3313215B2 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0809160A1 (fr) * 1995-12-06 1997-11-26 Citizen Watch Co., Ltd. Horloge radiocalibree
EP0952500A1 (fr) * 1997-11-20 1999-10-27 Seiko Epson Corporation Dispositif electronique et procede de commande de dispositif electronique
EP1006640A2 (fr) * 1998-12-04 2000-06-07 Seiko Epson Corporation Dispositif électronique portatif et méthode de commande du dispositif électronique portatif
EP1251413A1 (fr) * 2001-04-11 2002-10-23 Citizen Watch Co. Ltd. Montre électronique et méthode pour son entrainement
US6483781B2 (en) 1999-10-14 2002-11-19 Citizen Watch Co., Ltd. Electronic watch and drive method therefor
EP1321834A1 (fr) * 2000-09-27 2003-06-25 Citizen Watch Co. Ltd. Montre electronique et son procede de commande
EP1326146A1 (fr) * 2000-08-15 2003-07-09 Citizen Watch Co. Ltd. Syst me d'horlogerie lectronique et technique de commande de celui-ci
EP1349022A2 (fr) * 2002-03-26 2003-10-01 Seiko Epson Corporation Horloge contrôlée par radio et méthode de contrôle pour horloge contrôlée par radio
WO2003107100A1 (fr) * 2002-06-01 2003-12-24 セイコーエプソン株式会社 Horloge de correction radio et procede de commande de ladite horloge de correction radio
US7075859B2 (en) 2003-03-31 2006-07-11 Seiko Epson Corporation Radio-controlled timepiece and control method for the same
US7079451B2 (en) 2002-06-12 2006-07-18 Seiko Epson Corporation Time measurement device and method of controlling the time measurement device
EP1752841A1 (fr) 2005-08-08 2007-02-14 ETA SA Manufacture Horlogère Suisse Montre électronique mise en veille en fonction du signal d'un accéléromètre

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003032093A1 (fr) * 2001-10-05 2003-04-17 Citizen Watch Co., Ltd. Horloge de correction par ondes radio et procede de reglage
US7388812B2 (en) 2003-09-30 2008-06-17 Seiko Epson Corporation Radio-controlled timepiece and electronic device, control method for a radio-controlled timepiece, and reception control program for a radio-controlled timepiece
JP2006003219A (ja) * 2004-06-17 2006-01-05 Seiko Clock Inc 計時装置及び計時装置の搬送・保管方法
JP2006003308A (ja) * 2004-06-21 2006-01-05 Rhythm Watch Co Ltd 電波修正時計

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2730330A1 (de) * 1976-07-16 1978-01-19 Ebauches Electroniques Sa Elektronische uhr
EP0221363A1 (fr) * 1985-10-11 1987-05-13 Eta SA Fabriques d'Ebauches Montre électronique analogique
EP0439725A2 (fr) * 1990-01-31 1991-08-07 Junghans Uhren Gmbh Horloge radio-pilotée autonome

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2730330A1 (de) * 1976-07-16 1978-01-19 Ebauches Electroniques Sa Elektronische uhr
EP0221363A1 (fr) * 1985-10-11 1987-05-13 Eta SA Fabriques d'Ebauches Montre électronique analogique
EP0439725A2 (fr) * 1990-01-31 1991-08-07 Junghans Uhren Gmbh Horloge radio-pilotée autonome

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0809160A4 (fr) * 1995-12-06 1999-03-10 Citizen Watch Co Ltd Horloge radiocalibree
EP0809160A1 (fr) * 1995-12-06 1997-11-26 Citizen Watch Co., Ltd. Horloge radiocalibree
EP0952500A4 (fr) * 1997-11-20 2004-09-29 Seiko Epson Corp Dispositif electronique et procede de commande de dispositif electronique
EP0952500A1 (fr) * 1997-11-20 1999-10-27 Seiko Epson Corporation Dispositif electronique et procede de commande de dispositif electronique
EP1006640A2 (fr) * 1998-12-04 2000-06-07 Seiko Epson Corporation Dispositif électronique portatif et méthode de commande du dispositif électronique portatif
EP1006640A3 (fr) * 1998-12-04 2001-03-28 Seiko Epson Corporation Dispositif électronique portatif et méthode de commande du dispositif électronique portatif
US6424600B1 (en) 1998-12-04 2002-07-23 Seiko Epson Corporation Portable electronic device and control method for controlling the portable electronic device
US6483781B2 (en) 1999-10-14 2002-11-19 Citizen Watch Co., Ltd. Electronic watch and drive method therefor
EP1326146A4 (fr) * 2000-08-15 2004-10-06 Citizen Watch Co Ltd Syst me d'horlogerie lectronique et technique de commande de celui-ci
EP1326146A1 (fr) * 2000-08-15 2003-07-09 Citizen Watch Co. Ltd. Syst me d'horlogerie lectronique et technique de commande de celui-ci
EP1321834A4 (fr) * 2000-09-27 2004-10-06 Citizen Watch Co Ltd Montre electronique et son procede de commande
EP1321834A1 (fr) * 2000-09-27 2003-06-25 Citizen Watch Co. Ltd. Montre electronique et son procede de commande
US7154816B2 (en) 2000-09-27 2006-12-26 Citizen Watch Co., Ltd. Electronic watch and electronic watch control method
EP1251413A1 (fr) * 2001-04-11 2002-10-23 Citizen Watch Co. Ltd. Montre électronique et méthode pour son entrainement
EP1349022A3 (fr) * 2002-03-26 2004-06-02 Seiko Epson Corporation Horloge contrôlée par radio et méthode de contrôle pour horloge contrôlée par radio
EP1349022A2 (fr) * 2002-03-26 2003-10-01 Seiko Epson Corporation Horloge contrôlée par radio et méthode de contrôle pour horloge contrôlée par radio
US6967901B2 (en) 2002-03-26 2005-11-22 Seiko Epson Corporation Radio-controlled timepiece and control method for a radio-controlled timepiece
WO2003107100A1 (fr) * 2002-06-01 2003-12-24 セイコーエプソン株式会社 Horloge de correction radio et procede de commande de ladite horloge de correction radio
US7079451B2 (en) 2002-06-12 2006-07-18 Seiko Epson Corporation Time measurement device and method of controlling the time measurement device
US7075859B2 (en) 2003-03-31 2006-07-11 Seiko Epson Corporation Radio-controlled timepiece and control method for the same
EP1752841A1 (fr) 2005-08-08 2007-02-14 ETA SA Manufacture Horlogère Suisse Montre électronique mise en veille en fonction du signal d'un accéléromètre

Also Published As

Publication number Publication date
JP3313215B2 (ja) 2002-08-12
JPH07159555A (ja) 1995-06-23

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