JPS5582079A - Drive system for step motor for watch - Google Patents

Drive system for step motor for watch

Info

Publication number
JPS5582079A
JPS5582079A JP15600278A JP15600278A JPS5582079A JP S5582079 A JPS5582079 A JP S5582079A JP 15600278 A JP15600278 A JP 15600278A JP 15600278 A JP15600278 A JP 15600278A JP S5582079 A JPS5582079 A JP S5582079A
Authority
JP
Japan
Prior art keywords
drive
motor
pulse
drive pulse
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.)
Pending
Application number
JP15600278A
Other languages
Japanese (ja)
Inventor
Nobuo Toyama
Narikazu Takahashi
Shinji Sawada
Masaki Omori
Tsutomu Ogasawara
Toshihiko Sakai
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.)
Ricoh Elemex Corp
Ricoh Co Ltd
Original Assignee
Ricoh Elemex Corp
Ricoh 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 Ricoh Elemex Corp, Ricoh Co Ltd filed Critical Ricoh Elemex Corp
Priority to JP15600278A priority Critical patent/JPS5582079A/en
Publication of JPS5582079A publication Critical patent/JPS5582079A/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 make low in the power consumption of step motor, by increasing the pulse width of drive for a given time and using the narrow drive pulse normally, only when the state not contributing the drive of motor is caused. CONSTITUTION:When drive pulse is fed to the field coil 4 of the crystal watch 1, if the step motor does not perform a given rotary drive, this is detected 23 and the fast feed drive pulse increasing the pulse width in place of the drive pulse not contributed to the drive of the motor is outputted from the correction circuit 24 to momentarily correct the lag in the watch. Further, if the motor inactive state is detected 23, the pulse width of the drive pulse PI, PII from the drive pulse production circuit 5 is increased by a given time, and if the motor inactive state is again detected 23 after a given time elapsed, the width of the pulses PI, PII is increased with the timer circuit 8 for longer time further.
JP15600278A 1978-12-15 1978-12-15 Drive system for step motor for watch Pending JPS5582079A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15600278A JPS5582079A (en) 1978-12-15 1978-12-15 Drive system for step motor for watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15600278A JPS5582079A (en) 1978-12-15 1978-12-15 Drive system for step motor for watch

Publications (1)

Publication Number Publication Date
JPS5582079A true JPS5582079A (en) 1980-06-20

Family

ID=15618177

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15600278A Pending JPS5582079A (en) 1978-12-15 1978-12-15 Drive system for step motor for watch

Country Status (1)

Country Link
JP (1) JPS5582079A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5385467A (en) * 1976-12-30 1978-07-27 Seiko Epson Corp Electronic wristwatch
JPS53139566A (en) * 1977-05-11 1978-12-05 Seiko Epson Corp Electronic watch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5385467A (en) * 1976-12-30 1978-07-27 Seiko Epson Corp Electronic wristwatch
JPS53139566A (en) * 1977-05-11 1978-12-05 Seiko Epson Corp Electronic watch

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