JPS56125683A - Power source device for electronic watch - Google Patents

Power source device for electronic watch

Info

Publication number
JPS56125683A
JPS56125683A JP2910280A JP2910280A JPS56125683A JP S56125683 A JPS56125683 A JP S56125683A JP 2910280 A JP2910280 A JP 2910280A JP 2910280 A JP2910280 A JP 2910280A JP S56125683 A JPS56125683 A JP S56125683A
Authority
JP
Japan
Prior art keywords
voltage
circuit
constant
watch
supplied
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
JP2910280A
Other languages
Japanese (ja)
Inventor
Noboru Tonegawa
Shoichi Yasuda
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 JP2910280A priority Critical patent/JPS56125683A/en
Publication of JPS56125683A publication Critical patent/JPS56125683A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Electromechanical Clocks (AREA)

Abstract

PURPOSE:To make voltage constant even under heavy load by combining a constant voltage circuit which converts the voltage of a lithium battery to the voltage suited for a low-voltage system load and a circuit which boosts the output of this constant voltage circuit to the voltage necessary for driving liquid crystals etc. CONSTITUTION:The output of a lithium battery 10 is supplied to a constant voltage circuit 11, the constant voltage whereof is supplied to a watch circuit 1 and a boosting circuit 12. The boosted voltage is supplied to a driver 8 which in turn drives a liquid crystal display device 9 by a dynamic driving system. Whan a lamp L is lighted at around 0 deg.C, the output voltage of the lithium battery 10 drops, but since electric power is supplied to the watch circuit 1 and the boosting circuit 12 through the constant voltage circuit 10, the supplying voltage to each part of the watch is always constant and the operation of the watch is stabilized.
JP2910280A 1980-03-10 1980-03-10 Power source device for electronic watch Pending JPS56125683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2910280A JPS56125683A (en) 1980-03-10 1980-03-10 Power source device for electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2910280A JPS56125683A (en) 1980-03-10 1980-03-10 Power source device for electronic watch

Publications (1)

Publication Number Publication Date
JPS56125683A true JPS56125683A (en) 1981-10-02

Family

ID=12266975

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2910280A Pending JPS56125683A (en) 1980-03-10 1980-03-10 Power source device for electronic watch

Country Status (1)

Country Link
JP (1) JPS56125683A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5323171A (en) * 1989-05-26 1994-06-21 Seiko Epson Corporation Power circuit
WO1995023358A1 (en) * 1994-02-25 1995-08-31 Citizen Watch Co., Ltd. Portable device with sensor function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5323171A (en) * 1989-05-26 1994-06-21 Seiko Epson Corporation Power circuit
WO1995023358A1 (en) * 1994-02-25 1995-08-31 Citizen Watch Co., Ltd. Portable device with sensor function
US6466521B1 (en) 1994-02-25 2002-10-15 Citizen Watch Co., Ltd. Sensor function-equipped portable device

Similar Documents

Publication Publication Date Title
JPS56147209A (en) Automatic steering method for unattended carrying vehicle
TW359771B (en) Electrical apparatus supplied by a photovoltaic power source, in particular a timepiece
GB2017359A (en) Electronic timepiece power supply arrangement
JPS5492094A (en) Power supply method for liquid crystal display substance
JPS56125683A (en) Power source device for electronic watch
JPS5646695A (en) Circuit for exciting pulse motor
JPS56125684A (en) Power source device for electronic watch
JPS5617415A (en) Electric power supply system of electronic apparatus
JPS5296570A (en) Power saving method of crystal wristwatch
JPS5739378A (en) Electronic wristwatch
JPS56181A (en) Power circuit of printer
JPS5230470A (en) Electronic clock
JPS5745483A (en) Circuit for electrooptic display timepiece
JPS5617414A (en) Electric power supply system of electronic apparatus
FR2415384A1 (en) Standby supply for electrically operated gas consumption meter - has battery to feed memory circuit and liq. main supply is interrupted
JPS5776615A (en) Power source supply system of small-sized electronic equipment
JPS5344196A (en) Liquid crystal driving system
JPS54102166A (en) Battery life display system in electronic watch
JPS5734223A (en) Power supply circuit
JPS6231913Y2 (en)
JPS55491A (en) Electronic watch
JPS56163473A (en) Electronic timepiece
JPS6424233A (en) Driving system for liquid crystal display device of device mounted with internal combustion engine
JPS5576418A (en) Power supply system for small-size electronic apparatus
FR2271608A1 (en) Digital quartz oscillator watch supply cct - uses solar cells and rechargeable button-shaped battery