JPS55107986A - Illuminator for electronic watch - Google Patents
Illuminator for electronic watchInfo
- Publication number
- JPS55107986A JPS55107986A JP1577179A JP1577179A JPS55107986A JP S55107986 A JPS55107986 A JP S55107986A JP 1577179 A JP1577179 A JP 1577179A JP 1577179 A JP1577179 A JP 1577179A JP S55107986 A JPS55107986 A JP S55107986A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- voltage
- capacitor
- circuit
- pulse
- 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
Landscapes
- Electric Clocks (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
PURPOSE: To stably operate an EL plate driven by a DC pulse voltage for long time by eliminating the DC voltage by connecting a capacitor in series to the EL plate.
CONSTITUTION: A battery 6 contained in a watch supplies a current to a counter circuit 7 and also to a voltage raising circuit having a coil 8, a transistor 9 and a diode 10. When a rectangular wave is supplied from a counter circuit 7, a high DC pulse is generated at both terminals of serial circuit of an EL plate 11 and a capacitor 12 by the voltage raising circuit. The capacitor 12 eliminates the DC component of the DC pulse to thus apply only the AC component to the EL plate 11. Thus, the deterioration of light radiation of the EL plate 11 due to DC leakage voltage is eliminated to stably operate the EL plate for long time.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1577179A JPS55107986A (en) | 1979-02-14 | 1979-02-14 | Illuminator for electronic watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1577179A JPS55107986A (en) | 1979-02-14 | 1979-02-14 | Illuminator for electronic watch |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55107986A true JPS55107986A (en) | 1980-08-19 |
Family
ID=11898059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1577179A Pending JPS55107986A (en) | 1979-02-14 | 1979-02-14 | Illuminator for electronic watch |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55107986A (en) |
-
1979
- 1979-02-14 JP JP1577179A patent/JPS55107986A/en active Pending
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