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EP1215545A1 - Analoge elektronische Uhr mit Vorrichtung zur Zeitkorrektur nach einer mangelhaften Energiezufuhr - Google Patents

Analoge elektronische Uhr mit Vorrichtung zur Zeitkorrektur nach einer mangelhaften Energiezufuhr Download PDF

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Publication number
EP1215545A1
EP1215545A1 EP00204579A EP00204579A EP1215545A1 EP 1215545 A1 EP1215545 A1 EP 1215545A1 EP 00204579 A EP00204579 A EP 00204579A EP 00204579 A EP00204579 A EP 00204579A EP 1215545 A1 EP1215545 A1 EP 1215545A1
Authority
EP
European Patent Office
Prior art keywords
time
motor
voltage
supply
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.)
Withdrawn
Application number
EP00204579A
Other languages
English (en)
French (fr)
Inventor
Jean-Claude Martin
Jean-Charles Guanter
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.)
Asulab AG
Original Assignee
Asulab AG
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 Asulab AG filed Critical Asulab AG
Priority to EP00204579A priority Critical patent/EP1215545A1/de
Priority to PCT/EP2001/014208 priority patent/WO2002050617A1/fr
Priority to US10/450,853 priority patent/US6934223B2/en
Priority to KR1020037007502A priority patent/KR100880347B1/ko
Priority to DE60129738T priority patent/DE60129738T2/de
Priority to EP01985360A priority patent/EP1346264B1/de
Priority to CNB018207405A priority patent/CN1222850C/zh
Priority to JP2002551651A priority patent/JP4554884B2/ja
Publication of EP1215545A1 publication Critical patent/EP1215545A1/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G99/00—Subject matter not provided for in other groups of this subclass
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
    • G04G19/08—Arrangements for preventing voltage drop due to overloading the power supply

Definitions

  • the present invention relates to an electronic watch which comprises analog display means consisting of at least one needle driven by at minus an engine, a time base for controlling drive means said engine, a rechargeable power source, engine stop means acting in particular on said drive means and counting means time in synchronism with said analog display means for a sufficient supply voltage from the source.
  • a watch comprising means for detecting insufficiency motor supply is known in particular from document WO 98/33098.
  • This document presents an electronic watch with hands driven by an engine and controlled by electronic means containing data schedules, a power source and means of detecting the insufficiency of this source. In case of insufficient supply the needles are brought in and maintained at reference positions programmed in advance in the means e.
  • the main aim of the invention is therefore to overcome the drawbacks of the art mentioned above by providing an electronic watch which includes simplified electronic means which do not require programming a value of reference for resetting the time due to insufficient power.
  • the invention relates to an electronic watch of the type mentioned in the introduction which is characterized in that upon detection of an insufficiency supply by said stop means, said display means are stopped and the corresponding value of said counting means is stored in means of storage, said counting means continuing to operate, and in that time difference calculation means send, as soon as the supply is again sufficient, time difference signals between the stored value and the value of the counting means to said means of training for delivery to the time of said analog display means.
  • said engine stop means are actuated for a first threshold voltage corresponding to the detection of an insufficiency power supply and they are kept activated as long as a second voltage threshold greater than the first threshold voltage has not been reached by the source power supply, which avoids problems related to voltage variation power supply due to load variations when elements such as the engine.
  • This second threshold voltage corresponds to a determined charge level from the power source.
  • the storage means may include in particular a non-volatile memory.
  • Figure 1 shows the elements of the watch necessary for the understanding of the invention.
  • the electronic watch includes means analog display 1 generally consisting of at least two hands 2. One used to indicate the hours and the other the minutes. It is possible to provide a third hand used to indicate, for example, seconds.
  • the needles 2 are driven by at least one motor 3.
  • the hour hand and the minute hand are driven by a stepping motor and that of the seconds is driven by another stepper motor. Indeed, in a for energy savings, the motor driving the second hand may be stopped earlier.
  • a time base 4 makes it possible to define for each motor 3 the pitch for the advance of the needle 2 associated with said motor.
  • Time base 4 usually used, consists in particular of a quartz oscillator, referenced 5 and 6, and of different frequency divider stages 7 of the oscillator 6 to drive each motor 3 with the desired pitch.
  • Drive means 8 of the motor or motors 3 are provided for this purpose.
  • the motor 3 is supplied by a rechargeable power source 9 of the type accumulator or battery.
  • This power source 9 can be recharged with different ways, including the use of photovoltaic cells, oscillating weight, or by electrical contacts. This last method will preferably used to satisfy a need for rapid and complete recharging.
  • Voltage comparators 11 and 12 are placed at the output of the power source 9. They receive as input a fraction of the power supply voltage obtained by a voltage divider, for example a resistive bridge, and a voltage V ′ S1 , respectively V ' S2 . These voltages reflect the threshold voltages V S1 and V S2 (see Figures 2 to 4).
  • V S1 corresponds to a sufficient voltage to ensure synchronization between the time indication of the analog display 1 and the pulses supplied by the time base 4 to the drive means of the motor 8.
  • the value of this voltage is chosen with a safety factor in relation to the minimum voltage necessary for the correct operation of the motor 3.
  • V S2 corresponds to a determined load level for which the load is considered sufficient to restart the engine. The latter could still function correctly below this voltage.
  • This second threshold voltage also makes it possible to avoid the effects as discussed with reference to FIG. 3.
  • Obtaining the reflective voltages V ′ S1 and V ′ S2 is carried out by means of a conventional circuit known to those skilled in the art.
  • This circuit includes means for supplying a reference voltage to which a resistive voltage divider bridge is applied, defining the two voltages V ' S1 and V' S2 . These two voltages are therefore lower than the threshold voltages V S1 and V S2 .
  • Comparator 11 compares the fractionated supply voltage with the reflection voltage V ' S1 , respectively V' S2 . These comparison means 11 and 12 are operational as long as the supply voltage is greater than a minimum voltage V OUT (see FIG. 4).
  • switching means not shown, leaving only the comparator 11 active during the discharge of the power source 9, and conversely leaving the comparator 12 active when the source is charged supply 9.
  • Engine stop means 14 recover the results of the comparisons. These means make it possible in particular to detect an insufficient supply of the source 9. According to the state of the power supply and according to the previous state of the supplied motor by a signal 13, these stop means 14 will send to the drive means 8 a signal 15 for controlling the state of the engine, which will either be a signal to stop the engine, or a signal to start the engine.
  • a signal 15 for controlling the state of the engine, which will either be a signal to stop the engine, or a signal to start the engine.
  • the engine stop means are in particular connected to a reset circuit.
  • This time reset circuit 17 is made up of at least one counter 18 allowing to count time according to the pulses received by the time base 4, storage means composed of at least one memory 19 making it possible to memorize the content of the counter 18 and of time difference calculation means 20 making it possible to obtain the offset 24 between the position of the hands 2 and the time accurate.
  • the counter 18 operates continuously as long as the power source 9 delivers a minimum voltage V OUT sufficient to supply the time base 4 and operate said counter 18. Below this voltage V OUT , no more function is ensured to function properly. In general, this voltage V OUT is much lower than the first threshold voltage V S1 , which leaves the user sufficient time, for example, a minimum of several hours, to realize the insufficiency of feeding, needles 2 being stopped. The user can then recharge the accumulator or the battery 9 while keeping exact time information.
  • the motor 3 is stopped as well as the needles 2.
  • the stop means 14 then send the information signal 16a concerning the engine stop at a memory 19.
  • the value then contained in the counter 18 is stored in memory 19.
  • a memory is used 19 non-volatile.
  • an information signal 16b is sent to the difference calculation means 20.
  • these means 20 perform the subtraction between the current value 22 of the counter 18 and the stored value 23 in memory 19.
  • the result obtained is in the form of difference signals from times 21 which are sent to the drive means of the motor 8 in order to deliver hands 2 per hour.
  • the hands 2 are brought by the hour by the most short.
  • the drive means 8 control the rotation of the motor 3 in one direction or the other.
  • FIG. 2 represents the operation of the engine 14 stop means in as a function of the comparisons carried out by the comparators 11 and 12 and as a function of the state of the engine 15, seen in FIG. 1.
  • the abscissa shows the supply voltage supplied by the source 9. This voltage can vary between 0 and V MAX .
  • the zero voltage corresponds to the voltage delivered when the battery or accumulator 9 is completely discharged.
  • the voltage V MAX corresponds to the maximum voltage delivered when the battery or the accumulator is fully charged.
  • the voltage V OUT corresponds to the minimum voltage for which the data of the counter 18 is exact.
  • the voltages V S1 and V S2 correspond to the two threshold voltages whose associated reflection voltages V ' S1 and V' S2 make it possible to control the state of the motor.
  • the state in which the engine is located is shown. If the state corresponds to A, the engine is stopped. If the state corresponds to M, the motor is in market.
  • the voltage delivered is V MAX .
  • the energy supplied is sufficient, the motor is therefore running, that is to say in the state M.
  • the battery or accumulator 9 With time and the use of the time functions of the watch, the battery or accumulator 9 is discharged. When the supply voltage becomes lower than the threshold voltage V S1 , the energy supplied by the source is no longer sufficient to ensure synchronization between the time base 4 and the hourly indication of the hands 2.
  • the means d 'engine stop 14 are actuated and the engine 3 is stopped via the drive means of the engine 8. The engine 3 goes to state A.
  • the needles 2 are also stopped.
  • the value of the time counter 18 is memorized, the counter continuing to operate.
  • the majority of the energy consumed by the device is the energy consumed by the motor. This last stopped, consumption becomes very low. This is why, the watch can still calculate the time during the entire period of time during which the supply voltage is less than V S1 but greater than V OUT .
  • the motor 3 is only restarted from a second threshold voltage V S2 greater than V S1 and corresponding to a determined minimum recharging level.
  • the stop means 14 remain actuated, during recharging, for a value between V S1 and V S2 , because the state of the engine is at A.
  • Figures 3 and 4 show a typical discharge / recharge cycle of the power source 9 as a function of time, according to the prior art (FIG. 3) and according to the invention ( Figure 4).
  • a device As described in the introduction to this description, a device, according to Figure 3, leads to the creation of a transitional period that we want to avoid.
  • two reflective voltages V ′ S1 and V ′ S2 associated with the threshold voltages V S1 and V S2 are used to manage the means for stopping the motor 14, which makes it possible to 'Avoid the above-mentioned drawback common in devices of the prior art fitted with a battery or accumulator 9.
  • V S2 a second threshold voltage V S2 greater than V S1 is provided.
  • the value of V S2 is taken in such a way that it is greater than the voltage V S1 to which the overvoltage due to the shutdown of the main consumer is added, that is to say, when the engine stops. 3.
  • the power source 9 passes directly into a mode of operation less costly in energy. Therefore, the slope of discharge is much less pronounced between instants t1 and t2.
  • the instant t2 represents the moment when the user realizes that the hands 2 of his watch are stopped and decides to recharge the battery or accumulator 9. Charging is represented between instants t2 and t3.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromechanical Clocks (AREA)
EP00204579A 2000-12-18 2000-12-18 Analoge elektronische Uhr mit Vorrichtung zur Zeitkorrektur nach einer mangelhaften Energiezufuhr Withdrawn EP1215545A1 (de)

Priority Applications (8)

Application Number Priority Date Filing Date Title
EP00204579A EP1215545A1 (de) 2000-12-18 2000-12-18 Analoge elektronische Uhr mit Vorrichtung zur Zeitkorrektur nach einer mangelhaften Energiezufuhr
PCT/EP2001/014208 WO2002050617A1 (fr) 2000-12-18 2001-11-29 Montre electronique analogique ayant un dispositif de remise a l'heure suite a une insuffisance d'alimentation
US10/450,853 US6934223B2 (en) 2000-12-18 2001-11-29 Analogue electronic watch having a device for resetting the time following a power shortage
KR1020037007502A KR100880347B1 (ko) 2000-12-18 2001-11-29 전력 부족시 시간 재설정 장치를 갖춘 아날로그 전자식 시계
DE60129738T DE60129738T2 (de) 2000-12-18 2001-11-29 Analoge elektronische uhr mit vorrichtung zur zeitkorrektur nach einer mangelhaften energiezufuhr
EP01985360A EP1346264B1 (de) 2000-12-18 2001-11-29 Analoge elektronische uhr mit vorrichtung zur zeitkorrektur nach einer mangelhaften energiezufuhr
CNB018207405A CN1222850C (zh) 2000-12-18 2001-11-29 具有在电源不足后进行时间复位装置的模拟电子表
JP2002551651A JP4554884B2 (ja) 2000-12-18 2001-11-29 電力不足に続いて時刻をリセットする装置を有するアナログ電子腕時計

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00204579A EP1215545A1 (de) 2000-12-18 2000-12-18 Analoge elektronische Uhr mit Vorrichtung zur Zeitkorrektur nach einer mangelhaften Energiezufuhr

Publications (1)

Publication Number Publication Date
EP1215545A1 true EP1215545A1 (de) 2002-06-19

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Family Applications (2)

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EP00204579A Withdrawn EP1215545A1 (de) 2000-12-18 2000-12-18 Analoge elektronische Uhr mit Vorrichtung zur Zeitkorrektur nach einer mangelhaften Energiezufuhr
EP01985360A Expired - Lifetime EP1346264B1 (de) 2000-12-18 2001-11-29 Analoge elektronische uhr mit vorrichtung zur zeitkorrektur nach einer mangelhaften energiezufuhr

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EP01985360A Expired - Lifetime EP1346264B1 (de) 2000-12-18 2001-11-29 Analoge elektronische uhr mit vorrichtung zur zeitkorrektur nach einer mangelhaften energiezufuhr

Country Status (7)

Country Link
US (1) US6934223B2 (de)
EP (2) EP1215545A1 (de)
JP (1) JP4554884B2 (de)
KR (1) KR100880347B1 (de)
CN (1) CN1222850C (de)
DE (1) DE60129738T2 (de)
WO (1) WO2002050617A1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050105400A1 (en) * 2003-11-17 2005-05-19 Tai Wai Luk Electronic timepiece with analog display and a method of operating same
FR2867575B1 (fr) * 2004-03-09 2006-05-19 Brandt Ind Procede de gestion d'un affichage d'une information horaire dans un appareil electrique
ATE452355T1 (de) * 2006-05-18 2010-01-15 Microcomponents Ag Analoge anzeige und uhr für kraftfahrzeuge
JP4947180B2 (ja) * 2010-04-12 2012-06-06 カシオ計算機株式会社 電子時計
CN103869692A (zh) * 2012-12-17 2014-06-18 飞亚达（集团）股份有限公司 一种指针式时钟校时方法
JP2016206057A (ja) * 2015-04-24 2016-12-08 セイコーエプソン株式会社 電子時計
JP6597089B2 (ja) * 2015-09-10 2019-10-30 カシオ計算機株式会社 アナログ電子時計及び指針早送り制御方法
CN107239033A (zh) * 2017-07-14 2017-10-10 成都天奥电子股份有限公司 一种卫星时钟指针指示方式

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457664A (en) * 1992-09-08 1995-10-10 Seikosha Co., Ltd. Energy saving timepiece
EP0855633A1 (de) * 1996-08-01 1998-07-29 Citizen Watch Co. Ltd. Elektronische zeitmessvorrichtung
EP0919887A2 (de) * 1997-11-25 1999-06-02 Seiko Instruments Inc. Elektronisches Uhrwerk mit thermoelektrischem Element
EP1014227A2 (de) * 1998-12-11 2000-06-28 Seiko Epson Corporation Zeitmessvorrichtung und verfahren zu ihrer kontrolle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3057340B2 (ja) * 1992-03-12 2000-06-26 セイコーインスツルメンツ株式会社 電子時計
DK0848842T3 (da) * 1996-06-26 1999-11-08 Konrad Schafroth Urværk
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 (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5457664A (en) * 1992-09-08 1995-10-10 Seikosha Co., Ltd. Energy saving timepiece
EP0855633A1 (de) * 1996-08-01 1998-07-29 Citizen Watch Co. Ltd. Elektronische zeitmessvorrichtung
EP0919887A2 (de) * 1997-11-25 1999-06-02 Seiko Instruments Inc. Elektronisches Uhrwerk mit thermoelektrischem Element
EP1014227A2 (de) * 1998-12-11 2000-06-28 Seiko Epson Corporation Zeitmessvorrichtung und verfahren zu ihrer kontrolle

Also Published As

Publication number Publication date
JP4554884B2 (ja) 2010-09-29
KR20030059313A (ko) 2003-07-07
WO2002050617A1 (fr) 2002-06-27
DE60129738T2 (de) 2008-04-30
CN1481520A (zh) 2004-03-10
CN1222850C (zh) 2005-10-12
KR100880347B1 (ko) 2009-01-28
US6934223B2 (en) 2005-08-23
EP1346264A1 (de) 2003-09-24
JP2004516482A (ja) 2004-06-03
US20040027925A1 (en) 2004-02-12
DE60129738D1 (de) 2007-09-13
EP1346264B1 (de) 2007-08-01

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