DE69621392T2 - Elektronische Uhr - Google Patents

Elektronische Uhr

Info

Publication number
DE69621392T2
DE69621392T2 DE69621392T DE69621392T DE69621392T2 DE 69621392 T2 DE69621392 T2 DE 69621392T2 DE 69621392 T DE69621392 T DE 69621392T DE 69621392 T DE69621392 T DE 69621392T DE 69621392 T2 DE69621392 T2 DE 69621392T2
Authority
DE
Germany
Prior art keywords
electronic clock
clock
electronic
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.)
Expired - Lifetime
Application number
DE69621392T
Other languages
English (en)
Other versions
DE69621392D1 (de
Inventor
Koichi Sato
Fumio Kanno
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.)
Citizen Holdings Co Ltd
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 JP24136495A external-priority patent/JP3628080B2/ja
Priority claimed from JP24136095A external-priority patent/JPH0990063A/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 DE69621392D1 publication Critical patent/DE69621392D1/de
Application granted granted Critical
Publication of DE69621392T2 publication Critical patent/DE69621392T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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)
DE69621392T 1995-09-20 1996-09-20 Elektronische Uhr Expired - Lifetime DE69621392T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP24136495A JP3628080B2 (ja) 1995-09-20 1995-09-20 電子時計
JP24136095A JPH0990063A (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 (2)

Publication Number Publication Date
DE69621392D1 DE69621392D1 (de) 2002-07-04
DE69621392T2 true DE69621392T2 (de) 2003-01-09

Family

ID=27332932

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69621392T Expired - Lifetime DE69621392T2 (de) 1995-09-20 1996-09-20 Elektronische Uhr

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
US5933392A (en) * 1995-09-20 1999-08-03 Citizen Watch Co., Ltd. Electronic watch
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
US8094522B2 (en) * 2006-07-06 2012-01-10 Citizen Holdings Co., Ltd. Electronic clock
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
US8251575B2 (en) * 2008-03-07 2012-08-28 Citizen Watch Co., Ltd. Electronic timepiece
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
WO2011043389A1 (ja) * 2009-10-07 2011-04-14 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
WO2014017502A1 (ja) * 2012-07-23 2014-01-30 シチズンホールディングス株式会社 電子時計
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
CN106796414B (zh) * 2014-09-30 2020-02-18 西铁城时计株式会社 电子钟表
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
US5933392A (en) * 1995-09-20 1999-08-03 Citizen Watch Co., Ltd. Electronic watch
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
US5933392A (en) 1999-08-03
DE69621392D1 (de) 2002-07-04
EP0764894B1 (de) 2002-05-29
USRE40370E1 (en) 2008-06-10
HK1003454A1 (en) 1998-10-30

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8328 Change in the person/name/address of the agent

Representative=s name: KEHL & ETTMAYR, PATENTANWAELTE, 81679 MUENCHEN

8327 Change in the person/name/address of the patent owner

Owner name: CITIZEN HOLDINGS CO., LTD., NISHITOKYO, TOKIO/, JP