JPS55107986A - Illuminator for electronic watch - Google Patents

Illuminator for electronic watch

Info

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
Application number
JP1577179A
Other languages
Japanese (ja)
Inventor
Tadashi Hanaoka
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.)
Citizen Watch Co Ltd
Original Assignee
Citizen Watch 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 Citizen Watch Co Ltd filed Critical Citizen Watch Co Ltd
Priority to JP1577179A priority Critical patent/JPS55107986A/en
Publication of JPS55107986A publication Critical patent/JPS55107986A/en
Pending legal-status Critical Current

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
JP1577179A 1979-02-14 1979-02-14 Illuminator for electronic watch Pending JPS55107986A (en)

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)

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