JPS55143081A - Luminous source device with light emitting element - Google Patents

Luminous source device with light emitting element

Info

Publication number
JPS55143081A
JPS55143081A JP5190279A JP5190279A JPS55143081A JP S55143081 A JPS55143081 A JP S55143081A JP 5190279 A JP5190279 A JP 5190279A JP 5190279 A JP5190279 A JP 5190279A JP S55143081 A JPS55143081 A JP S55143081A
Authority
JP
Japan
Prior art keywords
led
voltage
light emitting
emitting element
source 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
JP5190279A
Other languages
Japanese (ja)
Inventor
Hideki Fukusono
Toshiro Abe
Yukio Iitaka
Yoshihisa Ishigami
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP5190279A priority Critical patent/JPS55143081A/en
Publication of JPS55143081A publication Critical patent/JPS55143081A/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
    • H05B45/395—Linear regulators
    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Landscapes

  • Led Devices (AREA)

Abstract

PURPOSE:To protect an LED by connecting a direct current input power source to the LED and by connecting a constant-voltage element to the LED in parallel. CONSTITUTION:A protective resister 6 is connected in series to the LED, and a Zener diode 7 is connected in parallel to the above series circuit with an inverse relation to the LED. With this composition, the voltage at both ends of the Zener diode 7 do not come up above the Zener voltage V2 when the input voltage V is increased. Therefore, the current applied to the LED is not increased in excess of a uniform value. The Zener diode 7 short-circuits the LED1 when the power source is connected reversely.
JP5190279A 1979-04-26 1979-04-26 Luminous source device with light emitting element Pending JPS55143081A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5190279A JPS55143081A (en) 1979-04-26 1979-04-26 Luminous source device with light emitting element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5190279A JPS55143081A (en) 1979-04-26 1979-04-26 Luminous source device with light emitting element

Publications (1)

Publication Number Publication Date
JPS55143081A true JPS55143081A (en) 1980-11-08

Family

ID=12899801

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5190279A Pending JPS55143081A (en) 1979-04-26 1979-04-26 Luminous source device with light emitting element

Country Status (1)

Country Link
JP (1) JPS55143081A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6169855U (en) * 1984-10-11 1986-05-13
JPH01309389A (en) * 1988-06-08 1989-12-13 Fujitsu Ltd Photocoupler current limiting circuit
US6054716A (en) * 1997-01-10 2000-04-25 Rohm Co., Ltd. Semiconductor light emitting device having a protecting device
JP2013225629A (en) * 2012-04-23 2013-10-31 Panasonic Corp Lighting circuit and switch
CN111083826A (en) * 2019-12-25 2020-04-28 深圳市芯飞凌半导体有限公司 LED drive circuit capable of adjusting brightness and color

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6169855U (en) * 1984-10-11 1986-05-13
JPH025546Y2 (en) * 1984-10-11 1990-02-09
JPH01309389A (en) * 1988-06-08 1989-12-13 Fujitsu Ltd Photocoupler current limiting circuit
US6054716A (en) * 1997-01-10 2000-04-25 Rohm Co., Ltd. Semiconductor light emitting device having a protecting device
JP2013225629A (en) * 2012-04-23 2013-10-31 Panasonic Corp Lighting circuit and switch
CN111083826A (en) * 2019-12-25 2020-04-28 深圳市芯飞凌半导体有限公司 LED drive circuit capable of adjusting brightness and color

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