EP1739511A1 - Verfahren zur Synchronisierung einer analogen Anzeige und eines flüchtigen Zähler in einer Uhr - Google Patents

Verfahren zur Synchronisierung einer analogen Anzeige und eines flüchtigen Zähler in einer Uhr Download PDF

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Publication number
EP1739511A1
EP1739511A1 EP05106032A EP05106032A EP1739511A1 EP 1739511 A1 EP1739511 A1 EP 1739511A1 EP 05106032 A EP05106032 A EP 05106032A EP 05106032 A EP05106032 A EP 05106032A EP 1739511 A1 EP1739511 A1 EP 1739511A1
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EP
European Patent Office
Prior art keywords
value
time
watch
mode
time counter
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.)
Granted
Application number
EP05106032A
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English (en)
French (fr)
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EP1739511B1 (de
Inventor
Fabien Blondeau
Laurent Christe
Jérôme Cuénin
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
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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.)
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Publication date
Application filed by ETA SA Manufacture Horlogere Suisse filed Critical ETA SA Manufacture Horlogere Suisse
Priority to DE602005012076T priority Critical patent/DE602005012076D1/de
Priority to AT05106032T priority patent/ATE419566T1/de
Priority to EP05106032A priority patent/EP1739511B1/de
Priority to TW095122786A priority patent/TW200717204A/zh
Priority to KR1020060058447A priority patent/KR20070003596A/ko
Priority to JP2006180846A priority patent/JP4795142B2/ja
Priority to US11/427,882 priority patent/US7593292B2/en
Priority to SG200604461A priority patent/SG128661A1/en
Priority to CNB2006101005493A priority patent/CN100514228C/zh
Publication of EP1739511A1 publication Critical patent/EP1739511A1/de
Priority to HK07106264.9A priority patent/HK1102513A1/xx
Application granted granted Critical
Publication of EP1739511B1 publication Critical patent/EP1739511B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G7/00—Synchronisation
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00—Arrangements of electric power supplies in time pieces
    • G04C10/04—Arrangements of electric power supplies in time pieces with means for indicating the condition of the power supply
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces

Definitions

  • the present invention generally relates to a multifunctional electronic watch powered by a non-rechargeable primary energy source comprising analog display means operating in synchronism with a value representative of a temporal information contained in a volatile time counter of which the value is calculated by means of a time base in a first mode of operation of the watch, called “time mode”, and operating asynchronously with this value in a second mode of operation of the watch, called “mode not schedule. "
  • the invention more particularly relates to a simplified synchronization method between the analog display means and the value of the counter during the replacement of the primary energy source.
  • He known in the prior art multifunctional electronic watches comprising a time base for calculating a value representative of a time information, namely the current time, a volatile time counter in which is stored the representative calculated value of the current time and the position of the analog display means, namely needles, operating in synchronism with this value calculated in a first operating mode called "time mode”, and operating asynchronously with the value calculated in a second mode of operation "non-time", such as a chronograph mode, a compass mode or a weather mode.
  • the watch For obvious reasons of cost and space available in such multifunction watches, it is preferable to power the watch by means of a primary energy source.
  • a primary energy source at the end of life of such a primary energy source, on the one hand, the needles are stopped when the energy supplied by this source is perceived as insufficient to move them, and, secondly, the counter value is corrupted when the source is insufficient to power the timer and reset when replacing the primary energy source.
  • the value contained in the time counter no longer corresponds with the value corresponding to the position at which the needles have been or have been stopped.
  • each needle is moved by means of an independent motor.
  • FIG. 1a represents, in time mode, the dial 2 of the watch on which the hands 4 and 6 indicate the current time, namely 10 hours 10 minutes, in synchronism with the value contained in the time counter 8 of the watch .
  • Figure 1b shows the same watch five minutes later, in non-hourly mode, the latter being actuated by the user.
  • the hands 4 and 6 indicate a predetermined reference value, ie here the two hands point to the first indicator corresponding to 1 hour or 5 minutes, an additional indicator 10 can be arranged facing the telescope (not shown) or on the dial or ice.
  • the user knows that he has entered the non-time mode corresponding to the indicator 10, the hands pointing in this direction.
  • the correct positioning of the needles can be done simply by moving the hands independently of each other by means of their respective motor, the electronics of the watch knowing the starting position of the needles defined by the value in the time counter , both being synchronous and the arrival position of the hands, the latter being predetermined for the selected non-time mode.
  • the counter value continues to be incremented by the time base, the hands then no longer in synchronism with this value.
  • the watch has returned to the time mode, whether the user has activated the time mode or the watch has returned to the time mode automatically, for example following a timeout.
  • the time indicated by hands 4 and 6 is now 10 hours and 20 minutes.
  • the corresponding value is contained in the time counter 8.
  • Figure 1e shows either the state of the watch at the end of life of the energy source, or just after the replacement of the energy source.
  • the time counter is no longer supplied and the value it contains is corrupted (set to zero), the hands always indicating 10 hours 20 minutes.
  • the user is then aware of having to change the energy source by seeing the needles stopped which brings us to the second case following the replacement of the energy source.
  • the value of the counter is set to zero, or any other constant value set in advance, the supply of the latter having been interrupted for a relatively long period of time following the replacement of the energy source. .
  • the replacement has just been done, the hands indicate another 10 hours 20 minutes. It will therefore be noted that the value contained in the time counter has an offset with the value corresponding to the actual position of the hands.
  • a time setting of the watch for example conventionally by means of a reset crown. 'hour.
  • the value contained in the counter can be modified in synchronism (8a) with the movement of the hands or remain unchanged (8b ).
  • the current time is 15 hours 30 minutes.
  • the user must turn the hands 5 hours and 10 minutes to bring them to a position where they correctly indicate the current time.
  • the counter (8a) remains synchronized during the reset, the value it contains is then 5 hours 10 minutes.
  • Figure 1g shows the position of the hands on the dial according to the two cases shown in Figure 1f, when the user activates the non-time mode again.
  • the user has activated the non-time mode 5 minutes after replacing the power source.
  • the value contained in the counter is therefore according to the two cases presented in FIG. 1f, from 5 hours 15 minutes (counter 8a), respectively from 0 hours 5 minutes (counter 8b).
  • the hour hand 4a is shifted by 4 hours 15 minutes in the opposite direction of clockwise.
  • This value of 4 hours 15 minutes is obtained by making the difference between the value contained in the counter 8a, ie in this example 5 hours 15 minutes and the predetermined reference position of the hour hand 4a in the non-hourly mode, either in this example 1 hour. Knowing that in the example considered the hour hand 4a is initially between the indicators of 3 and 4 hours, the displacement of 4 hours 15 minutes brings the latter to point between the indicators corresponding to 11 and 12 hours.
  • the minute hand 6a is, for its part, offset by 10 minutes in the opposite direction of clockwise.
  • This value of 10 minutes is obtained by making the difference between the value corresponding to the minutes contained in the counter 8a, ie 15 minutes in this example, and the predetermined reference position of the minute hand 6a in the non-hourly mode, either 5 minutes in this example. Knowing that in this example, the minute hand 6a initially points to 35 minutes, the displacement of 10 minutes brings the latter opposite the indicator corresponding to 25 minutes. It should be noted that the hands of the watch each indicate a "fanciful" value instead of indicating the desired reference position to warn the user that the time mode is selected. The user can rightly think that his watch does not work properly.
  • the same calculation rules are applied and because of the shift between the actual position of the needles 4b and 6b and the value supposed to correspond in the counter 8b, a whimsical result is also obtained.
  • the needles again do not point towards the desired reference position when the non-time mode is actuated by the user, who can therefore doubt the correct operation of this mode.
  • One of the main aims of the present invention is to overcome the aforementioned disadvantages by implementing a method of synchronization between the analog display means of the watch and the corresponding value stored in a volatile time counter to keep the correspondence between the two especially when replacing the primary energy source of the watch.
  • the electronic watch comprises analog display means generally comprising at least two hands 4 and 6 arranged on a dial 2, one of the hands 4 serving to indicate the hours and the other 6 the minutes in the time mode of the watch . It is of course possible to provide other needles, such as a third needle (not shown) for indicating seconds.
  • the needles 4 and 6 are driven at least by a motor 12.
  • a stepper motor to drive each of the needles, which allows to provide non-hourly indications, such as the layering of the two hands opposite an indicator shifted from 12.00.
  • the arrangement of motors and cogs for driving the needles will not be described here. It is indeed well known to those skilled in the art of watch movements comprising several motors for individually actuating several needles.
  • a time base 14 makes it possible to define for each motor 12 the pitch for the advance of the needle associated with said motor.
  • the time base generally used, consists in particular of a crystal oscillator and different frequency divider stages of the oscillator for driving each motor with the desired pitch.
  • Drive means 16 of the motor (s) 12 are provided for this purpose.
  • the motor (s) 12 are powered by a non-rechargeable primary power source 18.
  • a voltage comparator 20 is arranged at the output of the supply source 18. This comparator 20 receives at a first input the supply voltage Valim and at a second input a reference voltage Vref for comparing the supply voltage Valim with this reference voltage Vref.
  • This reference voltage Vref is chosen so that if the supply voltage is greater than or equal to the reference voltage (Valim ⁇ Vref), then the watch electronics and the analog display function correctly. On the other hand, if the supply voltage is lower than the reference voltage (Valim ⁇ Vref), then the watch electronics and especially the hands are no longer guaranteed to work properly.
  • the result of the comparison is transmitted to stop means 22 which, in the last case where the supply voltage is insufficient to operate the watch correctly, control the motor drive means 16 to stop and then position needles 4 and 6 in a position of reference so as to warn the user of the inadequacy of the power source 18 and therefore the need to replace it.
  • the reference position in which the needles are placed is preferably 12 hours 00.
  • a timekeeper circuit comprises in particular a volatile time counter 8 which makes it possible to count the time according to the pulses received by the time base 14.
  • the value of time contained in the counter 8 corresponds to an indication of the position of the needles, the latter then operating in synchronism with this value.
  • the watch in the context of the present invention, is a multifunction watch comprising at least one non-time mode in addition to the time mode.
  • the hands 4 and 6 provide non-hourly information that is no longer in synchronism with the time value contained in the counter 8.
  • the watch includes means 26 for selecting this non-hourly mode, which can be implemented for example in the form of a controller such as a push button.
  • selection means can be implemented, such as for example a touch screen, or an automatic trigger based on a measurement made by a watch sensor.
  • the selection means 26 of the watch switches from the time mode to a non-hourly mode or vice versa according to the mode in which it was previously.
  • the electronic part managing the non-hourly application (s) is activated.
  • the application management means 28 send to the difference calculation means 30 a signal 32 corresponding to a reference value in which the hands must be placed to indicate to the user. user that the desired mode is selected.
  • the difference calculation means 30 receive on the one hand a reference value (Vpos) from the management means of the non-clockwise application 28 and, on the other hand, the time value (Vtps) contained in the counter of 8.
  • the result of the difference made by the difference calculating means 30 makes it possible to supply a control signal 34 to the drive means of the motor or motors 16 for moving the hands from their current position to the reference position indicating the non-time mode selected. Conversely, in the case of switching from a non-clockwise mode to a time mode, the difference calculating means 30 provides the needle driving means with a control signal 34 for moving the hands from a reference position indicating the non-clockwise mode. previously selected at a position corresponding to a time information corresponding to the time value contained in the counter 8.
  • the difference calculating means 30 receive two signals corresponding on the one hand to the reference position of the current non-time mode (Vpos1) and on the other hand to the reference position of the newly selected non-time mode (Vpos2). ). The result of the difference (Vdif) thus makes it possible to go directly from one to the other of the reference positions of the two non-hourly applications.
  • the needles are automatically placed in a predetermined reference position when the supply voltage supplied by the power source 18 is insufficient for proper operation of the watch.
  • the user is notified of the need to replace the power source.
  • the time counter 8 is of the volatile type, the withdrawal of the power supply causes a setting of a predetermined reference value, for example a zeroing, of the time value it contains.
  • the watch functions again correctly and the time value (here 0) contained in the counter 8 corresponds to the actual position of the hands which have been placed in the reference position 12.00.
  • the watch electronics experiencing this shift may adequately increment the counter's time value upon initialization due to replacement of the power source so that this time value is representative of the actual position of the hands in the time mode.
  • the user can then perform a time reset, for example by means of a traditional mechanism actuated by a winding crown 36.
  • the reset mechanism transmits a movement signal 38 of the hands to the time counter 8 which can thus update the value of time so that the latter is always representative of the actual position of the hands in the time mode.
  • Figures 3a to 3g show an example of implementation of the synchronization method according to the present invention.
  • FIG. 3a represents, in time mode, the dial 2 of the watch on which the hands 4 and 6 indicate the current time, namely 10 hours 10 minutes, in synchronism with the value contained in the time counter 8 of the watch .
  • Figure 3b shows the same watch five minutes later, following the actuation of the control member 26 by the user to select a non-clock mode of the watch.
  • the hands 4 and 6 indicate a predetermined reference value, ie here the two hands point to the first indicator of the dial corresponding to 1 hour or 5 minutes, an additional indicator 10 can be arranged facing the bezel (not shown) or on the dial or ice.
  • the user knows that he has entered the non-time mode corresponding to the indicator 10, the hands pointing in this direction.
  • the correct positioning of the needles can be performed simply by moving the hands independently of each other by means of their respective motor, the electronics of the watch knowing the starting position of the needles defined by the value in the time counter , both being synchronous and the arrival position of the hands, the latter being predetermined for the selected non-time mode.
  • the counter value continues to be incremented by the time base, the hands then no longer in synchronism with this value.
  • the watch is back in time mode, either the user has actuated the return to the time mode, or the watch has returned to the time mode automatically following for example a timeout.
  • the time indicated by hands 4 and 6 is now 10 hours 20 minutes.
  • the corresponding value is contained in the time counter 8.
  • the supply voltage supplied by the primary power source has become insufficient to make the watch function correctly and in particular to ensure a correct advance of the hands, that is to say in synchronism with the value of This is why, in the context of the present invention, it is intended to compare the supply voltage (Valim) with a reference voltage (Vref). When the supply voltage is lower than the reference voltage, it is then planned to position the hands in a predetermined reference position, for example 12.00, then to activate the means for stopping the drive means of the one or more motors to lock the needles in said predetermined reference position. Thus, the user is warned of the power failure and knows that he must replace the power source.
  • the counter can independently continue to be incremented or not.
  • Figure 3e shows the watch following the replacement of the power source. Since the counter is a volatile memory, the value it contains was set to zero during the extended power interruption due to the replacement of the power source. Thus, the value of the counter is again representative of the position of the hands in the time mode. Note that if the predetermined reference position is chosen shifted from 12.00, this is not a problem since the offset between the counter value and the actual position of the hands is defined and therefore known to the electronics. the watch and as such can be corrected during initialization performed following the replacement of the power source.
  • Figure 3f shows the watch following the replacement of the power source and the time setting of the watch by the user.
  • the user actuates the winding crown 36 so as to put his watch on time, here 3 hours 30 minutes.
  • this time reset mode it is expected that the time value contained in the time counter 8 is modified in synchronism with the movement of the hands, and this value therefore also corresponds to 3 hours 30 minutes in this example.
  • Figure 3g shows the watch five minutes later, the time value of the meter is now 3 hours 35 minutes.
  • the hands 4 and 6 are moved to indicate the predetermined reference value, in which the two hands point to the first indicator corresponds to one hour, opposite the additional indicator 10.
  • the movement of the hands 4 and 6 from the position it occupied in the time mode, namely 3 hours 35 minutes and this reference position of the non-hourly mode selected is calculated by the difference calculating means of the watch.
  • the value of the counter is always representative of the actual position of the hands in the time mode, the latter are actually moved in the reference position of the selected non-time mode, as shown, contrary to the whimsical indications obtained with a solution according to the prior art. (see in particular Figure 1g).
  • the correct positioning of the needles can be performed simply by moving the hands independently of each other by means of their respective motor, the electronics of the watch knowing the starting position of the needles defined by the value in the time counter and the needle arrival position, which is predetermined for the selected non-time mode.
  • the counter value continues to be incremented by the time base, and the hands are no longer moved synchronism with the incrementation of this value.
  • the user knows that he has entered the non-time mode corresponding to the indicator 10, the hands pointing in this direction. Then, the watch can return to the time mode as explained in connection with Figure 3c.
  • the invention therefore relates to a method of synchronization between the analog display means 4, 6 and the volatile time counter 8 during the replacement of the primary power supply means 18 which comprises the following steps: (i) calculation of a value representative (Vtps) of time information by means of the time base (14) of the watch; (ii) storing the value in the volatile time counter; (iii) updating the value in the volatile time counter periodically as a function of the frequency of providing time information by the time base; (iv) synchronized display of the value representative of the time information by the analog display means in a first mode of operation of the watch; (v) unsynchronized display of a value not representative of time information by the analog display means in a second mode of operation of the watch; (vi) detecting the end of life of the primary supply means feeding the watch; (vii) setting the analog display means in a predetermined reference position following the end of life detection of the primary power supply means; (viii) setting a predetermined reference value of the value of the time counter upon removal of the primary power supply means; (
  • FIG. 4 represents a time counter used according to a preferred implementation of the synchronization method according to the invention.
  • the time counter 8 then comprises three zones 81, 82 and 83.
  • the central zone 82 contains the time value Vtps representative of a time information and the position of the hands in the time mode of the watch.
  • the counter further comprises at least one protected area, two 81 and 83 in the example shown, each containing a predetermined fixed value Vp1, Vp2. It is advantageously planned to check whether these values have not been modified following a resetting of the electronics that may occur for various reasons, such as for example an electrostatic discharge (ESD). Because of the volatile nature of the counter, it is important to ensure that the value contained in the counter has not been corrupted after a reset of the electronics.
  • ESD electrostatic discharge
  • the value of the time counter is almost certain also unchanged.
  • the watch electronics validates the time value as being always correct, that is, representative of the actual position of the needles.
  • the hands are always synchronized with the time value, and therefore no synchronization is necessary.
  • This verification has the advantage of being able to hide from the user unwanted electronic zeroings that have not corrupted the value of time and without prejudice to the proper functioning of the watch.
  • the time value of the counter may have been corrupted. It is therefore necessary in this case to manually synchronize the hands.
  • the method further comprising the steps of: (x) storing the representative value (Vtps) of time information in the variable data area (82); (xi) detecting a reset of the watch electronics; (xii) subsequent verification if at least part of the data (Vp1, Vp2) of the fixed data area (81, 83) has not been modified; (xiii) in the case of non-modification of the fixed data area, validating the value representing a temporal information as being correct.
  • the protected volatile memory zone comprises two predefined fixed data zones (81, 83) arranged on either side of the variable data zone (82).
  • the time counter preferably corresponds to the protected volatile memory zone.
  • the steps (ii) and (x) are one and the same step.
  • the protected volatile memory zone may be distinct from the time counter and in this case the step of storing the value representative of a temporal information in the protected volatile memory zone is performed at a frequency lower than the frequency of setting. day of the value in the time counter.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)
  • Telephone Set Structure (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
EP05106032A 2005-07-01 2005-07-01 Verfahren zur Synchronisierung einer analogen Anzeige und eines flüchtigen Zähler in einer Uhr Active EP1739511B1 (de)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE602005012076T DE602005012076D1 (de) 2005-07-01 2005-07-01 Verfahren zur Synchronisierung einer analogen Anzeige und eines flüchtigen Zähler in einer Uhr
AT05106032T ATE419566T1 (de) 2005-07-01 2005-07-01 Verfahren zur synchronisierung einer analogen anzeige und eines flüchtigen zähler in einer uhr
EP05106032A EP1739511B1 (de) 2005-07-01 2005-07-01 Verfahren zur Synchronisierung einer analogen Anzeige und eines flüchtigen Zähler in einer Uhr
TW095122786A TW200717204A (en) 2005-07-01 2006-06-23 Synchronisation method between analogue display means and the time counter of a watch
KR1020060058447A KR20070003596A (ko) 2005-07-01 2006-06-28 시계의 아날로그 디스플레이 수단과 시간 카운터 간의동기화 방법
US11/427,882 US7593292B2 (en) 2005-07-01 2006-06-30 Synchronization method between analogue display means and the time counter of a watch
JP2006180846A JP4795142B2 (ja) 2005-07-01 2006-06-30 時計のアナログ表示手段と時間カウンタ間の同期化方法
SG200604461A SG128661A1 (en) 2005-07-01 2006-06-30 Synchronisation method between analogue display means and the time counter of a watch
CNB2006101005493A CN100514228C (zh) 2005-07-01 2006-07-03 在模拟显示装置和表的计时器之间的同步方法
HK07106264.9A HK1102513A1 (en) 2005-07-01 2007-06-12 Synchronisation method between analogue display means and the time counter ; of a watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05106032A EP1739511B1 (de) 2005-07-01 2005-07-01 Verfahren zur Synchronisierung einer analogen Anzeige und eines flüchtigen Zähler in einer Uhr

Publications (2)

Publication Number Publication Date
EP1739511A1 true EP1739511A1 (de) 2007-01-03
EP1739511B1 EP1739511B1 (de) 2008-12-31

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US (1) US7593292B2 (de)
EP (1) EP1739511B1 (de)
JP (1) JP4795142B2 (de)
KR (1) KR20070003596A (de)
CN (1) CN100514228C (de)
AT (1) ATE419566T1 (de)
DE (1) DE602005012076D1 (de)
HK (1) HK1102513A1 (de)
SG (1) SG128661A1 (de)
TW (1) TW200717204A (de)

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
ATE507511T1 (de) * 2006-12-22 2011-05-15 Eta Sa Mft Horlogere Suisse Elektronische uhr mit anzeige der richtung eines vorprogrammierten geografischen orts
TWI417689B (zh) * 2009-03-20 2013-12-01 Hon Hai Prec Ind Co Ltd 顯示裝置及顯示方法
JP6338920B2 (ja) * 2014-04-23 2018-06-06 セイコーエプソン株式会社 アナログ電子時計
US10095189B2 (en) * 2014-06-12 2018-10-09 Nokia Technologies Oy Analog type watch and time set method
JP2017106753A (ja) * 2015-12-07 2017-06-15 セイコーエプソン株式会社 電子時計および電子時計の表示制御方法
CN107145064A (zh) * 2017-07-14 2017-09-08 成都天奥电子股份有限公司 一种时钟更换电池后的时间保持方法
CN109270826A (zh) * 2018-11-23 2019-01-25 重庆市钟表有限公司 一种电子手表及电子手表的校针方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2671646A1 (fr) * 1991-01-14 1992-07-17 Gorgy Timing Procede et dispositif assurant l'arret et la mise a l'heure d'une horloge.
DE19543590C1 (de) * 1995-11-23 1997-01-30 Braun Ag Funkuhr
US5671192A (en) * 1992-10-31 1997-09-23 Schaffel; Fritz Radio-controlled clockwork

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Publication number Priority date Publication date Assignee Title
JPH0236152Y2 (de) * 1985-04-24 1990-10-02
JPH0166094U (de) * 1987-10-23 1989-04-27
JP3706416B2 (ja) * 1995-09-26 2005-10-12 シチズン時計株式会社 発電機構付き電子時計
CH691090A5 (fr) * 1997-01-23 2001-04-12 Ebauchesfabrik Eta Ag Montre comportant des moyens de détection de l'insuffisance de la source d'alimentation.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2671646A1 (fr) * 1991-01-14 1992-07-17 Gorgy Timing Procede et dispositif assurant l'arret et la mise a l'heure d'une horloge.
US5671192A (en) * 1992-10-31 1997-09-23 Schaffel; Fritz Radio-controlled clockwork
DE19543590C1 (de) * 1995-11-23 1997-01-30 Braun Ag Funkuhr

Also Published As

Publication number Publication date
HK1102513A1 (en) 2007-11-23
TW200717204A (en) 2007-05-01
EP1739511B1 (de) 2008-12-31
US20070002693A1 (en) 2007-01-04
SG128661A1 (en) 2007-01-30
KR20070003596A (ko) 2007-01-05
CN1892517A (zh) 2007-01-10
JP4795142B2 (ja) 2011-10-19
US7593292B2 (en) 2009-09-22
DE602005012076D1 (de) 2009-02-12
CN100514228C (zh) 2009-07-15
JP2007010669A (ja) 2007-01-18
ATE419566T1 (de) 2009-01-15

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