WO2010049882A9 - Lighting unit with temperature protection - Google Patents

Lighting unit with temperature protection Download PDF

Info

Publication number
WO2010049882A9
WO2010049882A9 PCT/IB2009/054737 IB2009054737W WO2010049882A9 WO 2010049882 A9 WO2010049882 A9 WO 2010049882A9 IB 2009054737 W IB2009054737 W IB 2009054737W WO 2010049882 A9 WO2010049882 A9 WO 2010049882A9
Authority
WO
WIPO (PCT)
Prior art keywords
emitting diode
light emitting
lighting unit
overheating
threshold
Prior art date
Application number
PCT/IB2009/054737
Other languages
French (fr)
Other versions
WO2010049882A3 (en
WO2010049882A2 (en
Inventor
Viet Nguyen Hoang
Pascal Bancken
Radu Surdeanu
Benoit Bataillou
Peter Hubertus Franciscus Deurenberg
Gert-Jan Koolen
Gian Hoogzaad
Original Assignee
Nxp B.V.
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 Nxp B.V. filed Critical Nxp B.V.
Publication of WO2010049882A2 publication Critical patent/WO2010049882A2/en
Publication of WO2010049882A3 publication Critical patent/WO2010049882A3/en
Publication of WO2010049882A9 publication Critical patent/WO2010049882A9/en

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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/18—Controlling the intensity of the light using temperature feedback
    • 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
    • H05B45/56—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving measures to prevent abnormal temperature of the LEDs
    • 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)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

A method of operating a light emitting diode (1 ) comprises operating the light emitting diode to provide a desired brightness output and estimating the junction temperature of the light emitting diode based on electrical drive parameters of the light emitting diode. A threshold is derived which determines if there is overheating, and the light emitting diode is operated within the threshold. This method uses junction temperature estimation to implement a system which provides protection from overheating. The method allows an LED to be used at its maximum potential in term of light generation whilst avoiding the need for external temperature measurement.
PCT/IB2009/054737 2008-10-30 2009-10-27 Lighting unit with temperature protection WO2010049882A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08105702.8 2008-10-30
EP08105702 2008-10-30

Publications (3)

Publication Number Publication Date
WO2010049882A2 WO2010049882A2 (en) 2010-05-06
WO2010049882A3 WO2010049882A3 (en) 2010-09-30
WO2010049882A9 true WO2010049882A9 (en) 2011-04-21

Family

ID=41728244

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/054737 WO2010049882A2 (en) 2008-10-30 2009-10-27 Lighting unit with temperature protection

Country Status (1)

Country Link
WO (1) WO2010049882A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1038825C2 (en) * 2011-05-19 2012-11-20 Hermannus Gerhardus Maria Silderhuis Electric supply assembly for at least one led.
DE102012003162A1 (en) * 2012-02-19 2013-08-22 Hans-Wolfgang Diesing Temperature-controlled driver concept for LED lamps
FR3054375A1 (en) * 2016-07-22 2018-01-26 Valeo Vision MONITORING THE LED FLOW OF A LED
JP2022092972A (en) * 2020-12-11 2022-06-23 東京エレクトロン株式会社 Heating device and LED control method

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2224374A (en) * 1988-08-24 1990-05-02 Plessey Co Plc Temperature control of light-emitting devices
GB0204212D0 (en) * 2002-02-22 2002-04-10 Oxley Dev Co Ltd Led drive circuit

Also Published As

Publication number Publication date
WO2010049882A3 (en) 2010-09-30
WO2010049882A2 (en) 2010-05-06

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