JPS5320880A - Driving circuit of light emitting diode - Google Patents

Driving circuit of light emitting diode

Info

Publication number
JPS5320880A
JPS5320880A JP9484776A JP9484776A JPS5320880A JP S5320880 A JPS5320880 A JP S5320880A JP 9484776 A JP9484776 A JP 9484776A JP 9484776 A JP9484776 A JP 9484776A JP S5320880 A JPS5320880 A JP S5320880A
Authority
JP
Japan
Prior art keywords
light emitting
emitting diode
driving circuit
npn
flicker
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
JP9484776A
Other languages
Japanese (ja)
Inventor
Suminori Mizuno
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9484776A priority Critical patent/JPS5320880A/en
Publication of JPS5320880A publication Critical patent/JPS5320880A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/39—Circuits containing inverter bridges

Abstract

PURPOSE:To flicker two LEDs and let them perform alarm display by turning on and off the NPN and PNP transistors connected in push-pull in correspondence to input voltage levels.
JP9484776A 1976-08-11 1976-08-11 Driving circuit of light emitting diode Pending JPS5320880A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9484776A JPS5320880A (en) 1976-08-11 1976-08-11 Driving circuit of light emitting diode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9484776A JPS5320880A (en) 1976-08-11 1976-08-11 Driving circuit of light emitting diode

Publications (1)

Publication Number Publication Date
JPS5320880A true JPS5320880A (en) 1978-02-25

Family

ID=14121413

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9484776A Pending JPS5320880A (en) 1976-08-11 1976-08-11 Driving circuit of light emitting diode

Country Status (1)

Country Link
JP (1) JPS5320880A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108779A (en) * 1981-12-22 1983-06-28 Matsushita Electric Ind Co Ltd Led drive device
JPS61196386U (en) * 1985-04-18 1986-12-08
JPH0235259U (en) * 1988-08-26 1990-03-07

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58108779A (en) * 1981-12-22 1983-06-28 Matsushita Electric Ind Co Ltd Led drive device
JPS6244874B2 (en) * 1981-12-22 1987-09-22 Matsushita Electric Ind Co Ltd
JPS61196386U (en) * 1985-04-18 1986-12-08
JPH0235259U (en) * 1988-08-26 1990-03-07

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