FI116356B - Järjestelmä kunnonvalvontaa varten - Google Patents

Järjestelmä kunnonvalvontaa varten Download PDF

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Publication number
FI116356B
FI116356B FI20040165A FI20040165A FI116356B FI 116356 B FI116356 B FI 116356B FI 20040165 A FI20040165 A FI 20040165A FI 20040165 A FI20040165 A FI 20040165A FI 116356 B FI116356 B FI 116356B
Authority
FI
Finland
Prior art keywords
light
level
leds
led
control current
Prior art date
Application number
FI20040165A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI20040165A0 (fi
FI20040165A (fi
Inventor
Jari Tabell
Markku Kauko
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
Priority to FI20040165A priority Critical patent/FI116356B/fi
Publication of FI20040165A0 publication Critical patent/FI20040165A0/fi
Priority to EP05100565A priority patent/EP1562406B1/de
Priority to DE602005005095T priority patent/DE602005005095T8/de
Publication of FI20040165A publication Critical patent/FI20040165A/fi
Application granted granted Critical
Publication of FI116356B publication Critical patent/FI116356B/fi

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

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
FI20040165A 2004-02-03 2004-02-03 Järjestelmä kunnonvalvontaa varten FI116356B (fi)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI20040165A FI116356B (fi) 2004-02-03 2004-02-03 Järjestelmä kunnonvalvontaa varten
EP05100565A EP1562406B1 (de) 2004-02-03 2005-01-28 Verfahren und Vorrichtung zur Zustandsüberwachung von LEDs
DE602005005095T DE602005005095T8 (de) 2004-02-03 2005-01-28 Verfahren und Vorrichtung zur Zustandsüberwachung von LEDs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20040165 2004-02-03
FI20040165A FI116356B (fi) 2004-02-03 2004-02-03 Järjestelmä kunnonvalvontaa varten

Publications (3)

Publication Number Publication Date
FI20040165A0 FI20040165A0 (fi) 2004-02-03
FI20040165A FI20040165A (fi) 2005-08-04
FI116356B true FI116356B (fi) 2005-10-31

Family

ID=31725649

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20040165A FI116356B (fi) 2004-02-03 2004-02-03 Järjestelmä kunnonvalvontaa varten

Country Status (3)

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

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007036509A1 (de) * 2005-09-27 2007-04-05 Siemens Aktiengesellschaft Verfahren und einrichtung zur überwachung des lichtsignals eines elektro-optischen leuchtelements, insbesondere einer im bahnbetrieb verwendeten hochstrom-led eines sicheren bahnsignals
DE102005051212A1 (de) * 2005-10-26 2007-05-03 Bayerische Motoren Werke Ag Verfahren zur Überwachung der Funktion eines Leuchtkörpers
DE102007043416B4 (de) * 2007-09-12 2009-09-17 P.E.R. Flucht- Und Rettungsleitsysteme Gmbh Notbeleuchtungsverfahren und -system
DE102007045259A1 (de) 2007-09-21 2009-04-02 Continental Automotive Gmbh Verfahren und Vorrichtung zur Erfassung der von einer LED-Lichtquelle abgestrahlten Lichtleistung
DE102007049618A1 (de) 2007-10-17 2009-04-23 Audi Ag Vorrichtung und Verfahren zum Ermitteln eines Betriebsparameters von zumindest einem Leuchtmittel einer Lichtquelle eines Kraftfahrzeuges
DE102008034524B4 (de) * 2008-07-24 2019-12-05 Tridonic Gmbh & Co Kg Notlichteinheit
EP2580942A1 (de) * 2010-06-08 2013-04-17 Koninklijke Philips Electronics N.V. Ausfallsicheres beleuchtungssystem
DE102016205529A1 (de) * 2016-04-04 2017-10-05 Osram Gmbh Verfahren zum Vermessen von Licht
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
EP0974947B1 (de) * 1998-07-23 2004-12-15 Siemens Aktiengesellschaft Lichtsignalanlage sowie Verfahren zum Überwachen der Lichtsignalanlage
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
EP1562406B1 (de) 2008-03-05
DE602005005095D1 (de) 2008-04-17
EP1562406A1 (de) 2005-08-10
DE602005005095T2 (de) 2009-01-29
DE602005005095T8 (de) 2009-05-20
FI20040165A0 (fi) 2004-02-03
FI20040165A (fi) 2005-08-04

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