JPS56125682A - Lighting device for electronic watch - Google Patents
Lighting device for electronic watchInfo
- Publication number
- JPS56125682A JPS56125682A JP2896280A JP2896280A JPS56125682A JP S56125682 A JPS56125682 A JP S56125682A JP 2896280 A JP2896280 A JP 2896280A JP 2896280 A JP2896280 A JP 2896280A JP S56125682 A JPS56125682 A JP S56125682A
- Authority
- JP
- Japan
- Prior art keywords
- generated
- driving
- circuit
- switch
- alarm
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
- Electromechanical Clocks (AREA)
Abstract
PURPOSE:To decrease the number of parts and prevent the superposing of heavy loads by commonly forming an electroluminescence device which lights a time display part and a boosting driving circuit of a piezoelectric buzzer for alarming. CONSTITUTION:When the time of a clock circuit 22 and that of an alarm memory 24 coincide 25, an alarm driving signal SA is generated from a driving waveform generating circuit 26, and is supplied to the base of the transistor (TR)9 of a boosting driving circuit 14. A high-voltage counter electromotive force is generated by peaking of a coil 8 in the collector of the TR9 and applies spikelike high voltage to a piezoelectric buzzer 16 connected to the normally closed terminal 15c of a change- over switch 15, whereby alarm sounds are produced. If the lighting button of the watch is operated, the switch 15 changes over to a normally open terminal 15b; at the same time, a lighting switch 15' is closed and the driving signal SB for an EL plate 11 is generated from a driving waveform generating circuit 26, then the EL plate 11 lights a display device B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2896280A JPS56125682A (en) | 1980-03-07 | 1980-03-07 | Lighting device for electronic watch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2896280A JPS56125682A (en) | 1980-03-07 | 1980-03-07 | Lighting device for electronic watch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56125682A true JPS56125682A (en) | 1981-10-02 |
Family
ID=12263033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2896280A Pending JPS56125682A (en) | 1980-03-07 | 1980-03-07 | Lighting device for electronic watch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56125682A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995023359A1 (en) * | 1994-02-23 | 1995-08-31 | Citizen Watch Co., Ltd. | Ac driving device |
| JPH08152492A (en) * | 1994-09-27 | 1996-06-11 | Mansei Kogyo Kk | Timepiece device |
| CN104698806A (en) * | 2015-03-31 | 2015-06-10 | 黄馨莹 | Voice-activated self-lighting alarm clock |
-
1980
- 1980-03-07 JP JP2896280A patent/JPS56125682A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995023359A1 (en) * | 1994-02-23 | 1995-08-31 | Citizen Watch Co., Ltd. | Ac driving device |
| US6118219A (en) * | 1994-02-23 | 2000-09-12 | Citizen Watch Co., Ltd. | AC driver having three power supply voltages including an internally generated voltage |
| JPH08152492A (en) * | 1994-09-27 | 1996-06-11 | Mansei Kogyo Kk | Timepiece device |
| CN104698806A (en) * | 2015-03-31 | 2015-06-10 | 黄馨莹 | Voice-activated self-lighting alarm clock |
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