JPS5619472A - Electronic timepiece - Google Patents

Electronic timepiece

Info

Publication number
JPS5619472A
JPS5619472A JP9425679A JP9425679A JPS5619472A JP S5619472 A JPS5619472 A JP S5619472A JP 9425679 A JP9425679 A JP 9425679A JP 9425679 A JP9425679 A JP 9425679A JP S5619472 A JPS5619472 A JP S5619472A
Authority
JP
Japan
Prior art keywords
motor
load
time
driving
coil
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.)
Pending
Application number
JP9425679A
Other languages
Japanese (ja)
Inventor
Fumio Sugano
Akio Nakajima
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 Watch 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
Application filed by Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP9425679A priority Critical patent/JPS5619472A/en
Priority to US06/096,450 priority patent/US4283783A/en
Priority to DE19792947959 priority patent/DE2947959A1/en
Priority to GB7941032A priority patent/GB2038043B/en
Publication of JPS5619472A publication Critical patent/JPS5619472A/en
Pending 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Control Of Stepping Motors (AREA)

Abstract

PURPOSE:To reduce the electric current consumption of a step motor by converting a driving signal every time the load of the motor is detected. CONSTITUTION:This timepiece is equipped with step motor 5 that includes electromagnetic coil 5a driven by difference driving energy in accordance with a load state. After the driving signal is applied, coil 5a is changed over from the closed- circuit state to the open-circuit state, a voltage induced across coil 5a at the point in time of the switching is detected 6 and on the basis of the detection output, driving- signal converting circuit 3 is brought under control 7. In this case, detecting circuit 6 detects the load of motor 5 every time the motor is driven by each driving signal.
JP9425679A 1978-11-28 1979-07-26 Electronic timepiece Pending JPS5619472A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP9425679A JPS5619472A (en) 1979-07-26 1979-07-26 Electronic timepiece
US06/096,450 US4283783A (en) 1978-11-28 1979-11-21 Drive control system for stepping motor
DE19792947959 DE2947959A1 (en) 1978-11-28 1979-11-28 BATTERY POWERED ELECTRONIC WATCH
GB7941032A GB2038043B (en) 1978-11-28 1979-11-28 Electronic timepiece

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9425679A JPS5619472A (en) 1979-07-26 1979-07-26 Electronic timepiece

Publications (1)

Publication Number Publication Date
JPS5619472A true JPS5619472A (en) 1981-02-24

Family

ID=14105202

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9425679A Pending JPS5619472A (en) 1978-11-28 1979-07-26 Electronic timepiece

Country Status (1)

Country Link
JP (1) JPS5619472A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60109789A (en) * 1983-11-15 1985-06-15 Citizen Watch Co Ltd Load compensating circuit for motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60109789A (en) * 1983-11-15 1985-06-15 Citizen Watch Co Ltd Load compensating circuit for motor
JPH0557840B2 (en) * 1983-11-15 1993-08-25 Citizen Watch Co Ltd

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