JPS603577A - Wrist watch provided with solar battery - Google Patents

Wrist watch provided with solar battery

Info

Publication number
JPS603577A
JPS603577A JP11051783A JP11051783A JPS603577A JP S603577 A JPS603577 A JP S603577A JP 11051783 A JP11051783 A JP 11051783A JP 11051783 A JP11051783 A JP 11051783A JP S603577 A JPS603577 A JP S603577A
Authority
JP
Japan
Prior art keywords
voltage
detecting circuit
solar battery
capacitor
feeding
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
JP11051783A
Other versions
JPH0450549B2 (en
Inventor
Tomoo Ueda
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP11051783A priority Critical patent/JPH0450549B2/ja
Publication of JPS603577A publication Critical patent/JPS603577A/en
Publication of JPH0450549B2 publication Critical patent/JPH0450549B2/ja
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

Links

Classifications

    • GPHYSICS
    • G04HOROLOGY
    • G04CELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C10/00Arrangements of electric power supplies in time pieces
    • G04C10/02Arrangements of electric power supplies in time pieces the power supply being a radioactive or photovoltaic source

Abstract

PURPOSE:To prevent a wasteful current loss at the time of non-operation of a titled watch, and to shorten a charging time to come by providing a detecting circuit of a feeding voltage of a solar battery and a detecting circuit of a terminal voltage of a high capacity capacitor, and opening or closing a discharging circuit in accordance with whether its detecting voltage is high or low. CONSTITUTION:A timepiece load 1 is connected to an electric double layer capacitor 3 through a switching element 5. An output 12 of a feeding voltage detecting circuit 9 of a solar battery is outputted when the feeding voltage is in a state of a reference value or below, and an output 11 of a terminal voltage detecting circuit 10 of the electric double layer capacitor 3 is outputted when the terminal voltage is in a state of the reference value or above. When both the input 11 and the input 12 have a signal at an AND gate 13, a switching element 5 is turned on. The reference voltage is set in advance to the minimum operation voltage of the timepiece load 1, and when the capacitor 3 in charged to the minimum operating voltage or above, it is backed up naturally, but in case the discharge has been executed to the minimum operating voltage or below, discharge to the timepiece load 1 is inhibited.
JP11051783A 1983-06-20 1983-06-20 Expired - Lifetime JPH0450549B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11051783A JPH0450549B2 (en) 1983-06-20 1983-06-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11051783A JPH0450549B2 (en) 1983-06-20 1983-06-20

Publications (2)

Publication Number Publication Date
JPS603577A true JPS603577A (en) 1985-01-09
JPH0450549B2 JPH0450549B2 (en) 1992-08-14

Family

ID=14537797

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11051783A Expired - Lifetime JPH0450549B2 (en) 1983-06-20 1983-06-20

Country Status (1)

Country Link
JP (1) JPH0450549B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02175350A (en) * 1988-12-27 1990-07-06 Isuzu Motors Ltd Electric power source for vehicle
JPH05261360A (en) * 1991-12-20 1993-10-12 Hughes Aircraft Co Decontamination using recoverable increased gradient extraction and injection tube
EP0750384A3 (en) * 1995-06-14 1997-06-04 Honda Motor Co Ltd Apparatus for preventing overdischarge of battery used for electric vehicle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02175350A (en) * 1988-12-27 1990-07-06 Isuzu Motors Ltd Electric power source for vehicle
JPH05261360A (en) * 1991-12-20 1993-10-12 Hughes Aircraft Co Decontamination using recoverable increased gradient extraction and injection tube
EP0750384A3 (en) * 1995-06-14 1997-06-04 Honda Motor Co Ltd Apparatus for preventing overdischarge of battery used for electric vehicle
US5793189A (en) * 1995-06-14 1998-08-11 Honda Giken Kogyo Kabushiki Kaisha Apparatus for preventing over-discharge of batteries used in an electric vehicle

Also Published As

Publication number Publication date
JPH0450549B2 (en) 1992-08-14

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