DE602005005095T8 - Method and device for condition monitoring of LEDs - Google Patents

Method and device for condition monitoring of LEDs Download PDF

Info

Publication number
DE602005005095T8
DE602005005095T8 DE602005005095T DE602005005095T DE602005005095T8 DE 602005005095 T8 DE602005005095 T8 DE 602005005095T8 DE 602005005095 T DE602005005095 T DE 602005005095T DE 602005005095 T DE602005005095 T DE 602005005095T DE 602005005095 T8 DE602005005095 T8 DE 602005005095T8
Authority
DE
Germany
Prior art keywords
leds
condition monitoring
monitoring
condition
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.)
Active
Application number
DE602005005095T
Other languages
German (de)
Other versions
DE602005005095D1 (en
DE602005005095T2 (en
Inventor
Markku Kauko
Jari Tabell
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.)
Teknoware Oy
Original Assignee
Teknoware Oy
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 Teknoware Oy filed Critical Teknoware Oy
Publication of DE602005005095D1 publication Critical patent/DE602005005095D1/en
Application granted granted Critical
Publication of DE602005005095T2 publication Critical patent/DE602005005095T2/en
Publication of DE602005005095T8 publication Critical patent/DE602005005095T8/en
Active 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection 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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/12—Controlling the intensity of the light using optical feedback
DE602005005095T 2004-02-03 2005-01-28 Method and device for condition monitoring of LEDs Active DE602005005095T8 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20040165 2004-02-03
FI20040165A FI116356B (en) 2004-02-03 2004-02-03 Condition monitoring system

Publications (3)

Publication Number Publication Date
DE602005005095D1 DE602005005095D1 (en) 2008-04-17
DE602005005095T2 DE602005005095T2 (en) 2009-01-29
DE602005005095T8 true DE602005005095T8 (en) 2009-05-20

Family

ID=31725649

Family Applications (1)

Application Number Title Priority Date Filing Date
DE602005005095T Active DE602005005095T8 (en) 2004-02-03 2005-01-28 Method and device for condition monitoring of LEDs

Country Status (3)

Country Link
EP (1) EP1562406B1 (en)
DE (1) DE602005005095T8 (en)
FI (1) FI116356B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007036509A1 (en) * 2005-09-27 2007-04-05 Siemens Aktiengesellschaft Method and device for monitoring the light signal from an electrooptical light element, in particular a high-current led, which is used for railway purposes, of a safe railway signal
DE102005051212A1 (en) * 2005-10-26 2007-05-03 Bayerische Motoren Werke Ag Illuminant function monitoring method for use in motor vehicle, involves modulating luminance of illuminant by measuring operating parameter of illuminant, where time of measurement is synchronized with control of illuminant
DE102007043416B4 (en) * 2007-09-12 2009-09-17 P.E.R. Flucht- Und Rettungsleitsysteme Gmbh Emergency lighting method and system
DE102007045259A1 (en) * 2007-09-21 2009-04-02 Continental Automotive Gmbh Method and device for detecting the light output emitted by an LED light source
DE102007049618A1 (en) 2007-10-17 2009-04-23 Audi Ag Device and method for determining an operating parameter of at least one light source of a light source of a motor vehicle
DE102008034524B4 (en) * 2008-07-24 2019-12-05 Tridonic Gmbh & Co Kg emergency pack
CN102934520A (en) * 2010-06-08 2013-02-13 皇家飞利浦电子股份有限公司 Failsafe lighting system
DE102016205529A1 (en) * 2016-04-04 2017-10-05 Osram Gmbh Method for measuring light
US9648697B1 (en) * 2016-04-19 2017-05-09 Leviton Manufacturing Co., Inc. Brightness monitoring for LED failures and daylighting target adjusting

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5783909A (en) * 1997-01-10 1998-07-21 Relume Corporation Maintaining LED luminous intensity
GB9708861D0 (en) * 1997-04-30 1997-06-25 Signal House Limited Traffic signals
DE59911260D1 (en) * 1998-07-23 2005-01-20 Siemens Ag Traffic signal system and method for monitoring the traffic signal system
US20030015973A1 (en) * 2001-07-18 2003-01-23 Kevin Ovens Solid state traffic light with predictive failure analysis
US6836260B2 (en) * 2001-07-31 2004-12-28 Eastman Kodak Company Light emitting flat-panel display

Also Published As

Publication number Publication date
FI116356B (en) 2005-10-31
EP1562406B1 (en) 2008-03-05
EP1562406A1 (en) 2005-08-10
FI20040165A0 (en) 2004-02-03
FI20040165A (en) 2005-08-04
DE602005005095D1 (en) 2008-04-17
DE602005005095T2 (en) 2009-01-29

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