HK1003454A1 - Electronic watch - Google Patents

Electronic watch

Info

Publication number
HK1003454A1
HK1003454A1 HK98102524A HK98102524A HK1003454A1 HK 1003454 A1 HK1003454 A1 HK 1003454A1 HK 98102524 A HK98102524 A HK 98102524A HK 98102524 A HK98102524 A HK 98102524A HK 1003454 A1 HK1003454 A1 HK 1003454A1
Authority
HK
Hong Kong
Prior art keywords
electronic watch
watch
electronic
Prior art date
Application number
HK98102524A
Other languages
English (en)
Inventor
Koichi Sato
Fumio Kanno
Original Assignee
Citizen Watch Co Ltd
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 JP24136095A external-priority patent/JPH0990063A/ja
Priority claimed from JP24136495A external-priority patent/JP3628080B2/ja
Priority claimed from JP25605795A external-priority patent/JPH09101380A/ja
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Publication of HK1003454A1 publication Critical patent/HK1003454A1/xx

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/146—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor incorporating two or more stepping motors or rotors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
HK98102524A 1995-09-20 1998-03-24 Electronic watch HK1003454A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP24136095A JPH0990063A (ja) 1995-09-20 1995-09-20 電子時計
JP24136495A JP3628080B2 (ja) 1995-09-20 1995-09-20 電子時計
JP25605795A JPH09101380A (ja) 1995-10-03 1995-10-03 電子時計

Publications (1)

Publication Number Publication Date
HK1003454A1 true HK1003454A1 (en) 1998-10-30

Family

ID=27332932

Family Applications (1)

Application Number Title Priority Date Filing Date
HK98102524A HK1003454A1 (en) 1995-09-20 1998-03-24 Electronic watch

Country Status (4)

Country Link
US (2) US5933392A (de)
EP (1) EP0764894B1 (de)
DE (1) DE69621392T2 (de)
HK (1) HK1003454A1 (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0764894B1 (de) * 1995-09-20 2002-05-29 Citizen Watch Co., Ltd. Elektronische Uhr
JP3508444B2 (ja) * 1997-02-07 2004-03-22 セイコーエプソン株式会社 ステッピングモーターの制御装置、その制御方法および計時装置
JP3702729B2 (ja) * 1999-11-24 2005-10-05 セイコーエプソン株式会社 電子時計および電子時計の駆動制御方法
JP5065268B2 (ja) * 2006-07-06 2012-10-31 シチズンホールディングス株式会社 電子時計
JP4596002B2 (ja) * 2007-12-25 2010-12-08 カシオ計算機株式会社 針位置検出装置および針位置検出方法
JP4502023B2 (ja) * 2008-02-20 2010-07-14 カシオ計算機株式会社 ステップモータ駆動装置、ステップモータ駆動プログラム及びステップモータ駆動方法
CN101971108B (zh) * 2008-03-07 2012-07-25 西铁城时计株式会社 电子表
JP2009276223A (ja) * 2008-05-15 2009-11-26 Seiko Instruments Inc ステッピングモータ駆動回路及びアナログ電子時計
JP5363167B2 (ja) * 2008-05-29 2013-12-11 セイコーインスツル株式会社 ステッピングモータ制御回路及びアナログ電子時計
JP4730397B2 (ja) * 2008-05-30 2011-07-20 カシオ計算機株式会社 針位置検出装置
JP2010220408A (ja) * 2009-03-17 2010-09-30 Seiko Instruments Inc ステッピングモータ制御回路及びアナログ電子時計
JP2011013195A (ja) * 2009-07-06 2011-01-20 Seiko Instruments Inc クロノグラフ時計
JP2011022043A (ja) * 2009-07-16 2011-02-03 Seiko Instruments Inc クロノグラフ時計
JP5647613B2 (ja) * 2009-10-07 2015-01-07 シチズンホールディングス株式会社 電子時計
JP2011147330A (ja) * 2009-12-16 2011-07-28 Seiko Instruments Inc ステッピングモータ制御回路及びアナログ電子時計
JP2011169750A (ja) * 2010-02-18 2011-09-01 Seiko Instruments Inc 電子時計およびその処理方法とプログラム
EP2876508B1 (de) * 2012-07-23 2018-02-28 Citizen Watch Co., Ltd. Elektronische uhr
US10095189B2 (en) * 2014-06-12 2018-10-09 Nokia Technologies Oy Analog type watch and time set method
JP2016031329A (ja) * 2014-07-30 2016-03-07 セイコーエプソン株式会社 ステッピングモーター制御回路、半導体装置、およびアナログ電子時計
WO2016052577A1 (ja) * 2014-09-30 2016-04-07 シチズンホールディングス株式会社 電子時計
JP6287997B2 (ja) * 2015-08-06 2018-03-07 カシオ計算機株式会社 モータ駆動装置および電子時計
JP6759543B2 (ja) * 2015-09-11 2020-09-23 カシオ計算機株式会社 駆動装置、電子時計、および駆動装置の制御方法
TWI746663B (zh) * 2016-10-19 2021-11-21 日商精工電子有限公司 時計及時計的控制方法
JP7494472B2 (ja) * 2020-01-21 2024-06-04 セイコーエプソン株式会社 電子時計および電子時計の制御方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5280063A (en) * 1975-12-26 1977-07-05 Citizen Watch Co Ltd Reversible pulse motor system and watch
JPS5345575A (en) * 1976-10-06 1978-04-24 Seiko Epson Corp Electronic wristwatch
CH635973B (fr) * 1977-01-19 Suwa Seikosha Kk Circuit de commande pour un transducteur electromecanique d'une montre, notamment d'une montre-bracelet electronique.
JPS53114467A (en) * 1977-03-16 1978-10-05 Seiko Instr & Electronics Ltd Electronic watch
JPS5477169A (en) * 1977-12-02 1979-06-20 Seiko Instr & Electronics Ltd Electronic watch
JPS5612577A (en) * 1979-07-13 1981-02-06 Seiko Instr & Electronics Ltd Electronic clock
JPS5619473A (en) * 1979-07-27 1981-02-24 Citizen Watch Co Ltd Electronic timepiece
JPS5643575A (en) * 1979-09-18 1981-04-22 Seiko Instr & Electronics Ltd Electronic clock
DE2944872C2 (de) * 1979-11-07 1981-11-19 Gebrüder Junghans GmbH, 7230 Schramberg Anordnung zur Steuerung eines Schrittmotors für batteriebetriebene Geräte
GB2110846B (en) * 1981-10-27 1984-11-21 Citizen Watch Co Ltd Electronic timepiece
JPS6258189A (ja) * 1985-09-09 1987-03-13 Seiko Instr & Electronics Ltd アナログ電子時計
JPH0833457B2 (ja) * 1986-08-29 1996-03-29 シチズン時計株式会社 電子時計
EP0309164B1 (de) * 1987-09-21 1994-07-27 Seiko Epson Corporation Elektronische Analog-Uhr
US5247235A (en) * 1988-06-01 1993-09-21 Detra Sa Method of supplying power to a single phase step motor
EP0764894B1 (de) * 1995-09-20 2002-05-29 Citizen Watch Co., Ltd. Elektronische Uhr
EP1764894A1 (de) * 2005-09-19 2007-03-21 ABB Schweiz AG Verfahren zur Erkennung des Inselbetriebs eines dezentralen Energieerzeugers

Also Published As

Publication number Publication date
EP0764894A1 (de) 1997-03-26
EP0764894B1 (de) 2002-05-29
DE69621392D1 (de) 2002-07-04
USRE40370E1 (en) 2008-06-10
US5933392A (en) 1999-08-03
DE69621392T2 (de) 2003-01-09

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Legal Events

Date Code Title Description
PF Patent in force
PE Patent expired

Effective date: 20160919