WO2009138907A3 - Detection of failures within lighting devices - Google Patents

Detection of failures within lighting devices Download PDF

Info

Publication number
WO2009138907A3
WO2009138907A3 PCT/IB2009/051860 IB2009051860W WO2009138907A3 WO 2009138907 A3 WO2009138907 A3 WO 2009138907A3 IB 2009051860 W IB2009051860 W IB 2009051860W WO 2009138907 A3 WO2009138907 A3 WO 2009138907A3
Authority
WO
WIPO (PCT)
Prior art keywords
failures
detection
lighting devices
fail state
detecting
Prior art date
Application number
PCT/IB2009/051860
Other languages
French (fr)
Other versions
WO2009138907A2 (en
Inventor
William P. M. M. Jans
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 WO2009138907A2 publication Critical patent/WO2009138907A2/en
Publication of WO2009138907A3 publication Critical patent/WO2009138907A3/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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
    • 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]
    • H05B45/20—Controlling the colour 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/54—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a series array of LEDs
    • 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

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

There is proposed a method comprising driving at least one lighting device (20) and detecting a fail state. In order to use low voltage switches (28) and to reduce oscillating, there is provided sensing a voltage parallel to the at least one lighting device (20), detecting a fail state in case of a sensed over- voltage, and driving a shunt switch (28) to a closed state in case of a detected fail state.
PCT/IB2009/051860 2008-05-13 2009-05-06 Detection of failures within lighting devices WO2009138907A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08156082.3 2008-05-13
EP08156082 2008-05-13

Publications (2)

Publication Number Publication Date
WO2009138907A2 WO2009138907A2 (en) 2009-11-19
WO2009138907A3 true WO2009138907A3 (en) 2010-01-07

Family

ID=41181126

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2009/051860 WO2009138907A2 (en) 2008-05-13 2009-05-06 Detection of failures within lighting devices

Country Status (1)

Country Link
WO (1) WO2009138907A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009060791A1 (en) 2009-12-22 2011-06-30 Automotive Lighting Reutlingen GmbH, 72762 Light module for a lighting device of a motor vehicle and lighting device of a motor vehicle with such a light module
EP2427033B1 (en) * 2010-09-07 2014-11-12 Monolithic Power Systems, Inc. Bypass circuitry for serially coupled light emitting diodes and associated methods of operation
CN102355778B (en) * 2010-09-07 2014-02-19 成都芯源系统有限公司 Bypass circuit and bypass method
KR101679763B1 (en) * 2010-09-10 2016-11-25 오스람 실바니아 인코포레이티드 Directly driven high efficiency led circuit
TWI429161B (en) * 2011-07-21 2014-03-01 Silicon Touch Tech Inc Shunt protection module for series device and its shunt protection method
CN104206010A (en) * 2012-01-20 2014-12-10 欧司朗有限公司 Optoelectronic component device
TWI492663B (en) * 2013-01-30 2015-07-11 Delta Electronics Inc Light-emitting device and control method of the same
CN113447754B (en) * 2021-06-08 2023-02-24 苏州方昇光电股份有限公司 Testing device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2278717A (en) * 1993-05-31 1994-12-07 Fujitsu Ltd Driver circuit for light emitting elements
EP1750486A1 (en) * 2005-07-29 2007-02-07 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH A multiple-cell LED arrangement, related cell and manufacturing process
US20070159750A1 (en) * 2006-01-09 2007-07-12 Powerdsine, Ltd. Fault Detection Mechanism for LED Backlighting
EP1814366A1 (en) * 2006-01-18 2007-08-01 Macroblock Inc. Light-emitting semiconductor device with open-bypass function

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2278717A (en) * 1993-05-31 1994-12-07 Fujitsu Ltd Driver circuit for light emitting elements
EP1750486A1 (en) * 2005-07-29 2007-02-07 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH A multiple-cell LED arrangement, related cell and manufacturing process
US20070159750A1 (en) * 2006-01-09 2007-07-12 Powerdsine, Ltd. Fault Detection Mechanism for LED Backlighting
EP1814366A1 (en) * 2006-01-18 2007-08-01 Macroblock Inc. Light-emitting semiconductor device with open-bypass function

Also Published As

Publication number Publication date
WO2009138907A2 (en) 2009-11-19

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