JPS56150384A - Illuminating device of electronic watch - Google Patents

Illuminating device of electronic watch

Info

Publication number
JPS56150384A
JPS56150384A JP5328080A JP5328080A JPS56150384A JP S56150384 A JPS56150384 A JP S56150384A JP 5328080 A JP5328080 A JP 5328080A JP 5328080 A JP5328080 A JP 5328080A JP S56150384 A JPS56150384 A JP S56150384A
Authority
JP
Japan
Prior art keywords
circuit
plate
time
current consumption
display part
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
JP5328080A
Other languages
Japanese (ja)
Inventor
Shingo Ichikawa
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 JP5328080A priority Critical patent/JPS56150384A/en
Publication of JPS56150384A publication Critical patent/JPS56150384A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0023—Visual time or date indication means by light valves in general
    • G04G9/0029—Details
    • G04G9/0035—Details constructional
    • G04G9/0041—Illumination devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

PURPOSE:To obtain a face light emitting device having an extremely small amount of current consumption, by dividing the driving electrode of an electroluminescence (EL) device and then giving a time-division drive to each of the divided electrodes. CONSTITUTION:When the illumination switch 5a is off, the boosting circuit 15 and the time dividing circuit 16 are nonactive. Thus the EL plate B has no light emission and functions as an ordinary reflecting plate. When the illumination button 5 is operated in a dark place, the switch 5a is turned on to actuate the circuits 15 and 16. As a result, a high voltage boosted by the circuit 15 is distributed via the circuit 16 to be applied to the transparent electrodes b1 and b2 of plate B alternately. Thus the main display part 3 and the secondary display part 4 are illuminated alternately. However, the both display parts can be obtained simultaneously in terms of vision. At the same time, the area for the drive electrode can be cut to half to reduce the amount of current consumption.
JP5328080A 1980-04-22 1980-04-22 Illuminating device of electronic watch Pending JPS56150384A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5328080A JPS56150384A (en) 1980-04-22 1980-04-22 Illuminating device of electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5328080A JPS56150384A (en) 1980-04-22 1980-04-22 Illuminating device of electronic watch

Publications (1)

Publication Number Publication Date
JPS56150384A true JPS56150384A (en) 1981-11-20

Family

ID=12938320

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5328080A Pending JPS56150384A (en) 1980-04-22 1980-04-22 Illuminating device of electronic watch

Country Status (1)

Country Link
JP (1) JPS56150384A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03126395U (en) * 1990-04-03 1991-12-19
JP2012173131A (en) * 2011-02-22 2012-09-10 Casio Comput Co Ltd Electronic timepiece

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03126395U (en) * 1990-04-03 1991-12-19
JP2012173131A (en) * 2011-02-22 2012-09-10 Casio Comput Co Ltd Electronic timepiece

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