JPS54152987A - Light-emitting diode circuit - Google Patents

Light-emitting diode circuit

Info

Publication number
JPS54152987A
JPS54152987A JP6114578A JP6114578A JPS54152987A JP S54152987 A JPS54152987 A JP S54152987A JP 6114578 A JP6114578 A JP 6114578A JP 6114578 A JP6114578 A JP 6114578A JP S54152987 A JPS54152987 A JP S54152987A
Authority
JP
Japan
Prior art keywords
voltage
led
led3
noises
zener
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
JP6114578A
Other languages
Japanese (ja)
Inventor
Hiromi Hosoda
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP6114578A priority Critical patent/JPS54152987A/en
Publication of JPS54152987A publication Critical patent/JPS54152987A/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]
    • H05B45/30—Driver circuits
    • H05B45/36—Circuits for reducing or suppressing harmonics, ripples or electromagnetic interferences [EMI]

Abstract

PURPOSE:To improve noise resistance by series-connecting a Zener diode to a LED with polarities made opposite mutually. CONSTITUTION:Zener diode 5 has a low Zener voltage as compared with the voltage of power supply 1 and conducts, with switch 2 closed, to feed a current to LED3 in the forward direction, so that LED3 will emit light. Even if noises are induced at connection line 11, the LED remain conducted when the peak value of noises is below the sum of the Zener voltage and forward voltage of the LED. As a result, the noise blind sector expands remarkably and the noise resistance also improve.
JP6114578A 1978-05-24 1978-05-24 Light-emitting diode circuit Pending JPS54152987A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6114578A JPS54152987A (en) 1978-05-24 1978-05-24 Light-emitting diode circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6114578A JPS54152987A (en) 1978-05-24 1978-05-24 Light-emitting diode circuit

Publications (1)

Publication Number Publication Date
JPS54152987A true JPS54152987A (en) 1979-12-01

Family

ID=13162633

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6114578A Pending JPS54152987A (en) 1978-05-24 1978-05-24 Light-emitting diode circuit

Country Status (1)

Country Link
JP (1) JPS54152987A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001045470A1 (en) * 1999-12-14 2001-06-21 Takion Co., Ltd. Power supply and led lamp device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001045470A1 (en) * 1999-12-14 2001-06-21 Takion Co., Ltd. Power supply and led lamp device
US6577072B2 (en) 1999-12-14 2003-06-10 Takion Co., Ltd. Power supply and LED lamp device
KR100520721B1 (en) * 1999-12-14 2005-10-11 가부시키가이샤 다키온 Power supply and led lamp device
JP4353667B2 (en) * 1999-12-14 2009-10-28 株式会社タキオン LED lamp device

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