JPS5498652A - Lighting device of electronic watch - Google Patents

Lighting device of electronic watch

Info

Publication number
JPS5498652A
JPS5498652A JP15276377A JP15276377A JPS5498652A JP S5498652 A JPS5498652 A JP S5498652A JP 15276377 A JP15276377 A JP 15276377A JP 15276377 A JP15276377 A JP 15276377A JP S5498652 A JPS5498652 A JP S5498652A
Authority
JP
Japan
Prior art keywords
signal
switch
latch circuit
lighting
lighting device
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
JP15276377A
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 JP15276377A priority Critical patent/JPS5498652A/en
Publication of JPS5498652A publication Critical patent/JPS5498652A/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
    • G04G9/0047—Details electrical, e.g. selection or application of the operating voltage

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Clocks (AREA)
  • Indicating Measured Values (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

PURPOSE:To prevent flickering of lighting easily, by using a latch circuit having common input and output terminals. CONSTITUTION:A latch circuit 2 consisting of inverters 6, 7 having common input and output terminals is connected to a switch 1 and an amplifier 3. When a lighting signal is given from the switch 1, the lighting signal is stored in the latch circuit 2, and even if the contact signal from the switch 1 is interrupted due to bounding of the switch contact, the signal is continuously applied to the amplifier 3 from te input/output terminal of the latch circuit 2. Therefore, the light emitting body 4 which is driven by the amplfier 3 is set in lighting mode smoothly. Similarly, when an extinguishing signal is given from the switch 1, the signal is also stored in the latch circuit 2, so that the light emitting body 4 is smoothly put in the extinguishing state even if the signal from the switch 1 is interrupted.
JP15276377A 1977-12-19 1977-12-19 Lighting device of electronic watch Pending JPS5498652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15276377A JPS5498652A (en) 1977-12-19 1977-12-19 Lighting device of electronic watch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15276377A JPS5498652A (en) 1977-12-19 1977-12-19 Lighting device of electronic watch

Publications (1)

Publication Number Publication Date
JPS5498652A true JPS5498652A (en) 1979-08-03

Family

ID=15547607

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15276377A Pending JPS5498652A (en) 1977-12-19 1977-12-19 Lighting device of electronic watch

Country Status (1)

Country Link
JP (1) JPS5498652A (en)

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