JPS56125683A - Power source device for electronic watch - Google Patents
Power source device for electronic watchInfo
- 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
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.
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)
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 |
-
1980
- 1980-03-10 JP JP2910280A patent/JPS56125683A/en active Pending
Cited By (3)
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 |
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