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EP0955619A1 - Verkehrssignalisierungsverwaltungsverfahren - Google Patents

Verkehrssignalisierungsverwaltungsverfahren Download PDF

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Publication number
EP0955619A1
EP0955619A1 EP99401083A EP99401083A EP0955619A1 EP 0955619 A1 EP0955619 A1 EP 0955619A1 EP 99401083 A EP99401083 A EP 99401083A EP 99401083 A EP99401083 A EP 99401083A EP 0955619 A1 EP0955619 A1 EP 0955619A1
Authority
EP
European Patent Office
Prior art keywords
light
diode
current
defective
diodes
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.)
Withdrawn
Application number
EP99401083A
Other languages
English (en)
French (fr)
Inventor
Cyrille Chanal
Stéphane Manac'h
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.)
Sagem SA
Original Assignee
Sagem SA
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 Sagem SA filed Critical Sagem SA
Publication of EP0955619A1 publication Critical patent/EP0955619A1/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/097—Supervising of traffic control systems, e.g. by giving an alarm if two crossing streets have green light simultaneously
    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/52—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a parallel 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]
    • H05B45/50—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]
    • H05B45/50—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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/23—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in series

Definitions

  • Road signs use luminous signaling equipment when it is a question of being able to modify the signs or when they are likely to be invisible at night. This is the case of signaling lights or even indicator panels in the form of a box comprising a transparent front plate bearing an indication and lit by a source housed in the box.
  • an incandescent or halogen bulb can be used, which has the advantage of having a high optical power.
  • two bulbs are mounted in parallel. As the failure of one bulb results in its breaking, there is therefore no short circuit and the other bulb remains powered.
  • a plurality of light sources is used.
  • low voltage each consisting of a light emitting diode.
  • the large number of such diodes aims to overcome any total failure of the light source.
  • Each diode operating under a very low voltage, of a few volts, requires a determined electrical energy, that is to say in practice a determined current.
  • a known solution consists in mounting in parallel several branches made up of diodes in series. In this way, any failure, by cutting a diode in a branch, only results in a drop in power all the more limited the higher the number of branches, or redundancy rate. However, the multiplication of diodes all the more increases the probabilities of failures in this plurality of diodes and the deactivation of as many branches.
  • the present invention aims to solve the problem of locating defective diodes.
  • the invention relates to a method for managing a light source comprising light elements connected according to a plurality of branches supplied with current in parallel and each formed from several light elements in series, characterized in that the correct operation of each element is controlled individually and the power supply is controlled to keep the light flux from the source constant.
  • a printed circuit board 1 integrated, in this example, with a traffic signal repeater light mounted on the pole of a light pole.
  • the card 1 has in practice a circular shape the size of the repeater and carries a plurality of low-voltage light elements, here light-emitting diodes 11 to 18, substantially evenly distributed on the card 1 and lighting in a direction perpendicular thereto.
  • the representation which is made here of the card 1 illustrates only the electric diagram. Similarly, for clarity of the drawing, only a very limited number of light-emitting diodes have been shown, which may in fact exceed one hundred.
  • the branches are supplied by a continuous supply 2 and, in this example, each is supplied through an adjustable generator, 3, 4 of constant current, controlled by an integrated circuit 5 with microprocessor, connected to ground just like the cathodes of the downstream diodes 14 and 18 of the two branches.
  • the integrated circuit 5 is supplied with DC voltage by another source or by the source 2, possibly through a level reducer.
  • the integrated circuit 5 comprises in particular test interface pins 51 to 58, in a number corresponding to the number of diodes 11 to 18.
  • Each pin 51 to 58 is connected to a diode 11 to 18 which is specific to it and, more precisely , the pins 51 to 58 are all connected to homologous electrode terminals, here the anodes, of the diodes 11 to 18.
  • a microprocessor test circuit 50 of circuit 5 is connected at the input, not shown, to pins 51 to 58 and it commands the writing of a memory 60 comprising data from an electronic card representing and identifying the diodes 11 to 18 and indicating their possible failure, by short circuit or cut.
  • the memory card 60 controls itself, by a bundle of links 69, B branches of S dipoles 61 to 68, therefore having an electrical arrangement which is the image of that of the diodes 11 to 18.
  • Each dipole 61 to 68 connects two pins 51 to 58, neighboring in a branch, which are specific to it.
  • Each dipole 61 to 68 can have two electrical conduction states: a blocked state, in which no current flows through it, and a conductive state, in which it lets at least one supply current from the diodes 11 to 18. It s is an all-or-nothing switch here.
  • a circuit 70 is here provided for emitting an alarm, under the control of circuit 50.
  • the microprocessor circuit 50 individually controls the proper functioning of each diode 11-18 and the loss of optical power, or luminous flux, due to a defective diode 11-18 is compensated, at least partially, by the circuit 50 or, automatically and independently, from one of the sources 3, 4.
  • the microprocessor circuit 50 scans the voltages of the various pins 51 to 58 to compare the voltage of each diode terminal 11 to 18 with that of a terminal of an adjacent diode, in order to locate a diode 11 to 18 defective.
  • the voltages of pins 51 and 52 are compared to verify that they differ by a value within a specified range, for example from two to four volts.
  • this diode 12 forms a switch and has, between its terminals, a voltage exceeding the values of the range provided, while all the other diodes in the branch having a zero voltage, lack of supply current. An internal short circuit cannot therefore be detected in this cycle.
  • the circuit 50 after scanning of all the defective branch, determines that the diode 12 is cut (voltage greater than the upper limit of the range) and it writes this information in the card 60.
  • the switch 62 in parallel on the diode 12, is then closed to short-circuit the latter and thus ensure the electrical continuity of the branch in question.
  • the card 60 is updated with the corresponding information, without however the need to close the corresponding switch.
  • the fault type information of the diodes 11-18 accumulated in the card 60 allow the circuit 50, according to the various electrical positions of the diodes 11 to 18 defective in the branches, to compensate for the variations in optical power, or light flux, due to one or more defective diodes. Indeed, a diode 11 to 18 cut and short-circuited by the associated switch 61 to 68 causes a loss of the total optical power since a constant current supply 3, 4 is provided here.
  • the circuit 50 controls in such a case an increase in the current in at least one of the branches and, for example, that comprising the diode 11 to 18 cut and externally short-circuited (61 to 68).
  • an automatic correction at the level of the current generators 3, 4 by providing that they have a limited and regulated output impedance, so that any internal or external short circuit to a diode 11 to 14 or 15 to 18 causes a slight increase in current increasing the optical power of the other diodes 11 to 14 or 15 to 18 of the branch, to such an extent that the loss of optical power of the defective diode 11 to 18 is compensated for.
  • the branch representing the electric charge of the generator 3, 4, which, by the voltage which it presents, controls the current supplied by the generator 3, 4.
  • the circuit 50 estimates, from the card 60, the consequences, in optical power, of the possible occurrence of a new diode failure 11 to 18 and it generates an alarm if an unacceptable risk threshold is then exceeded. .
  • the alarm can be a signal sent, by circuit 70, to a remote monitoring receiver, by wire or by radio.
  • a short cyclical flashing of the diodes can also be provided, as long as it does not risk inducing users in error.
  • the voltages of electrically adjacent diode terminals 11-18 are compared, such as for example the anodes of diodes 13 and 17, that is to say located at the same potential level, with the dispersions near the fall characteristics. of the various diodes 11 - 18.
  • two diodes 11-18 can be electrically adjacent “vertically”, in a branch, or, as here, “horizontally” from one branch to another.
  • the diode 13 If the diode 13 is cut, its anode potential and that of the diodes 11 and 12 upstream is too high and reaches the supply voltage while the downstream diode 14 has a zero anode voltage, therefore too low.
  • the diode 13 If the diode 13 is in internal short circuit, the anode voltages in the branch are too low compared to those of the other branch. In the case of a non-fixed current supply, for example at constant voltage, the diodes 11, 12, 14 having an increased voltage between their terminals: the anode of diode 12 is then at too low voltage and that of diode 14 is too high voltage.
  • the number B of branches clearly exceeds the value 2
  • the branches without defective diode provide, by majority vote on all the branches, a voltage reference value for each "voltage plane" of the homologous anodes, likewise level, various branches.
  • the detection of the failure of a diode 11-18 can also be carried out in a different way than that indicated above.
  • a diode cut 11-18 will cause the output of the generator 3 or 4 to pass, supplying it with a maximum voltage, tending to maintain the expected current. A detection of this maximum voltage therefore indicates a break in the branch considered.
  • an internal diode short circuit 11-18 causes a drop in voltage of the generator 3, 4, which can be detected. It is thus possible to start a control cycle only upon detection of a fault. A current or absence of current detector can likewise be provided. In the event of a break, activation of the switches 61 - 64 or 65 - 68 associated with the branch makes it possible to short-circuit the diodes 11 - 18, one by one to detect the position of the switch 61 - 68 which restores a current.
  • the switches 61, 62 are successively closed and they are kept closed until the current is restored, which occurs when a last switch is closed ( 63). The maintenance of the current is then tested during the opening of the other switches 61 and 62 and thus determines that the switch 61 must also remain closed.
  • the operating order of switches 61 - 64 of a branch can be arbitrary.
  • the individual control of the diodes 11-18 can also be carried out by a plurality of B x S optical sensors each associated with a particular diode 11-18.
  • the indication of the failure of the diode 11 - 18 considered is thus obtained directly, failure the nature of which, internal short-circuit or break, is determined by the state, of operation or of apparent failure, of the other diodes of the branch . Closing the appropriate switch 61 - 68 restores their operation in such a case.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP99401083A 1998-05-05 1999-05-04 Verkehrssignalisierungsverwaltungsverfahren Withdrawn EP0955619A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9805661 1998-05-05
FR9805661A FR2778481B1 (fr) 1998-05-05 1998-05-05 Procede de gestion d'une source de lumiere de signalisation routiere

Publications (1)

Publication Number Publication Date
EP0955619A1 true EP0955619A1 (de) 1999-11-10

Family

ID=9526035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99401083A Withdrawn EP0955619A1 (de) 1998-05-05 1999-05-04 Verkehrssignalisierungsverwaltungsverfahren

Country Status (2)

Country Link
EP (1) EP0955619A1 (de)
FR (1) FR2778481B1 (de)

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001033912A1 (en) * 1999-11-04 2001-05-10 Koninklijke Philips Electronics N.V. An led array having an active shunt arrangement
WO2003017728A1 (de) * 2001-08-16 2003-02-27 Siemens Aktiengesellschaft Lichtzeichen zur verkehrssteuerung und verfahren zur funktionsüberwachung eines solchen zeichens
DE10324609A1 (de) * 2003-05-30 2004-12-23 Osram Opto Semiconductors Gmbh Ansteuerschaltung für ein LED-Array und Verfahren zum Betreiben eines LED-Arrays
DE19841490B4 (de) * 1998-09-10 2005-06-30 Infineon Technologies Ag Schaltungsanordnung zum Schutz einer Serienschaltung aus mindestens zwei Leuchdioden vor dem Ausfall
WO2005079121A3 (en) * 2004-02-11 2005-11-17 Peter Bhagat Apparatus for the control of lighting and associated methods
DE102007001501A1 (de) * 2006-01-12 2007-07-19 Denso Corp., Kariya Fahrzeugscheinwerfer-Vorrichtung
WO2007104703A1 (en) * 2006-03-10 2007-09-20 Elettrolab S.R.L. An electronic device for electrical power distribution.
FR2901956A1 (fr) * 2006-06-06 2007-12-07 Lyracom Sarl Procede de gestion de diodes electroluminescentes disposees en serie et lanterne incorporant des diodes electroluminescentes en serie
DE102006031679A1 (de) * 2006-07-08 2008-01-10 Hella Kgaa Hueck & Co. Schaltungsanordnung zur elektrischen Ansteuerung eines Kraftfahrzeug-Scheinwerfers
EP1906711A1 (de) * 2006-09-28 2008-04-02 Valeo Vision Vorrichtung zur Steuerung mehrerer Ladungen wie Lichtquellen und Beleuchtungs- und/oder Signalisierungsvorrichtung eines Fahrzeugs, in das eine solche Steuervorrichtung integriert ist
EP1931179A1 (de) * 2006-12-08 2008-06-11 Schneider Electric Industries SAS Variables LED-Beleuchtungssystem
EP1942707A1 (de) * 2007-01-04 2008-07-09 Applied Materials, Inc. Detektor für Lampendefekte
DE102007047847A1 (de) * 2007-11-22 2009-06-04 Signalbau Huber Gmbh Lichtsignalanlage mit Signalgebern und einer Steuereinrichtung zum Steuern von Leuchten in den Signalgebern
WO2009074913A1 (en) * 2007-12-10 2009-06-18 Calzoni S.R.L. Light indication system for airport runways, road routes and the like.
DE102008048701A1 (de) * 2008-09-24 2010-03-25 Hella Kgaa Hueck & Co. Verfahren zum Betrieb einer Reihenschaltung von mindestens zwei LED's
DE102008037551A1 (de) * 2008-11-14 2010-05-20 Lear Corporation Gmbh Vorrichtung zum Betreiben von Leuchtdiodenketten
WO2010083948A1 (de) * 2009-01-23 2010-07-29 Trumpf Laser Gmbh + Co. Kg Verfahren zur bestimmung der degradation und/oder effizienz von lasermodulen und lasereinheit
FR2949937A1 (fr) * 2009-09-08 2011-03-11 Valeo Vision Procede d'alimentation de dispositifs d'eclairage ou de signalisation d'un vehicule, systeme d'eclairage ou de signalisation correspondant
WO2012034102A1 (en) * 2010-09-10 2012-03-15 Osram Sylvania Inc. Directly driven high efficiency led circuit
US8237590B2 (en) 2008-04-28 2012-08-07 GE Lighting Solutions, LLC Apparatus and method for reducing failures in traffic signals
DE102011053491A1 (de) * 2011-04-04 2012-10-04 Jb-Lighting Lichtanlagentechnik Gmbh Scheinwerfer mit Leuchtdioden
EP2587888A1 (de) * 2011-07-21 2013-05-01 Silicon Touch Technology, Inc. Shunt-Schutzmodul und Verfahren für hintereinandergeschaltete Vorrichtungen
US8896220B2 (en) 2011-03-07 2014-11-25 Osram Sylvania Inc. High efficiency, low energy storage driver circuit for solid state light sources
DE102014107947A1 (de) * 2014-06-05 2015-12-17 Pintsch Bamag Antriebs- Und Verkehrstechnik Gmbh LED-Einheit mit Spannungsüberwachung, Verwendung einer solchen LED-Einheit sowie LED-Leuchte mit einer solchen LED-Einheit
EP2979954A2 (de) 2014-07-29 2016-02-03 PINTSCH BAMAG Antriebs- und Verkehrstechnik GmbH Led-einheit für lichtsignalgeber, lichtsignalgeber mit einer solchen einheit und verfahren zur überwachung eines led-strangs einer led-einheit
DE102015008109A1 (de) * 2015-06-17 2016-12-22 Elmos Semiconductor Aktiengesellschaft Vorrichtung zur Überwachung mindestens zweier LED-Ketten
DE102015008110A1 (de) * 2015-06-17 2016-12-22 Elmos Semiconductor Ag Verfahren zur Überwachung mindestens zweier LED-Ketten
DE102016105516B3 (de) * 2016-03-24 2017-03-02 Elmos Semiconductor Aktiengesellschaft Verfahren zur Überwachung mindestens zweier unterschiedlich langer LED-Ketten mit Hilfe programmierbarer Spannungsteiler
DE102016105517B3 (de) * 2016-03-24 2017-03-16 Elmos Semiconductor Aktiengesellschaft Vorrichtung zur Überwachung mindestens zweier unterschiedlich langer LED-Ketten mit Hilfe programmierbarer Spannungsteiler
DE102016103871A1 (de) * 2016-03-03 2017-09-07 Washtec Holding Gmbh Verfahren und Vorrichtung zum automatischen Erfassen der Konfiguration von hintereinander geschalteten Leuchtelementen
DE102018110982A1 (de) 2017-05-22 2018-11-22 Elmos Semiconductor Aktiengesellschaft Verfahren zur optischen Funktionsüberwachung der Lichtabstrahlung von LED-Leuchtmitteln in Leuchten
DE102017111089A1 (de) 2017-05-22 2018-11-22 Elmos Semiconductor Aktiengesellschaft Verfahren zur optischen Funktionsüberwachung der Lichtabstrahlung von mindestens drei verschiedenfarbigen LED-Leuchtmitteln in Leuchten
DE102017111087A1 (de) 2017-05-22 2018-11-22 Elmos Semiconductor Aktiengesellschaft Verfahren zur optischen Funktionsüberwachung der Lichtabstrahlung von mindestens drei LED-Leuchtmitteln in Leuchten
EP3407681A1 (de) 2017-05-22 2018-11-28 ELMOS Semiconductor Aktiengesellschaft Verfahren und vorrichtung zur durchführung einer funktionsprüfung eines leuchtmittels einer leuchte für beleuchtungs- oder anzeigezwecke
DE102015017314B3 (de) 2015-06-17 2022-11-17 Elmos Semiconductor Se Vorrichtung zur Überwachung mindestens zweier LED-Ketten mit unterschiedlichen Flussspannungen der LEDs
DE102015017315B3 (de) 2015-06-17 2022-12-01 Elmos Semiconductor Se Verfahren zur Überwachung mindestens zweier LED-Ketten mit LEDs unterschiedlicher Flussspannungen

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US5430354A (en) * 1992-03-24 1995-07-04 North American Philips Corporation HID lamp and auxiliary lamp ballast using a single multiple function switch
US5457450A (en) * 1993-04-29 1995-10-10 R & M Deese Inc. LED traffic signal light with automatic low-line voltage compensating circuit

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
FR2577061A1 (fr) * 1985-02-07 1986-08-08 Charbonnier Jean Procede de telecontrole de signaux lumineux de circulation et dispositif de securite universel pour les installations de signalisation routiere utilisant cette categorie de signaux
US5430354A (en) * 1992-03-24 1995-07-04 North American Philips Corporation HID lamp and auxiliary lamp ballast using a single multiple function switch
US5457450A (en) * 1993-04-29 1995-10-10 R & M Deese Inc. LED traffic signal light with automatic low-line voltage compensating circuit

Cited By (59)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19841490B4 (de) * 1998-09-10 2005-06-30 Infineon Technologies Ag Schaltungsanordnung zum Schutz einer Serienschaltung aus mindestens zwei Leuchdioden vor dem Ausfall
WO2001033912A1 (en) * 1999-11-04 2001-05-10 Koninklijke Philips Electronics N.V. An led array having an active shunt arrangement
WO2003017728A1 (de) * 2001-08-16 2003-02-27 Siemens Aktiengesellschaft Lichtzeichen zur verkehrssteuerung und verfahren zur funktionsüberwachung eines solchen zeichens
US7129856B2 (en) 2001-08-16 2006-10-31 Siemens Aktiengesellschaft Illuminated sign for traffic control and method for functional monitoring of such a sign
DE10324609A1 (de) * 2003-05-30 2004-12-23 Osram Opto Semiconductors Gmbh Ansteuerschaltung für ein LED-Array und Verfahren zum Betreiben eines LED-Arrays
DE10324609B4 (de) * 2003-05-30 2014-11-13 Osram Gmbh Ansteuerschaltung und LED-Array sowie Verfahren zum Betreiben eines LED-Arrays
WO2005079121A3 (en) * 2004-02-11 2005-11-17 Peter Bhagat Apparatus for the control of lighting and associated methods
US8487545B2 (en) 2004-02-11 2013-07-16 Peter Bhagat Apparatus for the control of lighting and associated methods
DE102007001501A1 (de) * 2006-01-12 2007-07-19 Denso Corp., Kariya Fahrzeugscheinwerfer-Vorrichtung
DE102007001501B4 (de) * 2006-01-12 2010-07-01 DENSO CORPORATION, Kariya-shi Fahrzeugscheinwerfer-Vorrichtung
US7755295B2 (en) 2006-01-12 2010-07-13 Denso Corporation Vehicle head lamp device
WO2007104703A1 (en) * 2006-03-10 2007-09-20 Elettrolab S.R.L. An electronic device for electrical power distribution.
FR2901956A1 (fr) * 2006-06-06 2007-12-07 Lyracom Sarl Procede de gestion de diodes electroluminescentes disposees en serie et lanterne incorporant des diodes electroluminescentes en serie
DE102006031679A1 (de) * 2006-07-08 2008-01-10 Hella Kgaa Hueck & Co. Schaltungsanordnung zur elektrischen Ansteuerung eines Kraftfahrzeug-Scheinwerfers
FR2906672A1 (fr) * 2006-09-28 2008-04-04 Valeo Vision Sa Dispositif de controle d'une pluralite de charges comme des sources lumineuses et dispositif d'eclairage et/ou de signalisation de vehicule incorporant un tel dispositif de controle
EP1906711A1 (de) * 2006-09-28 2008-04-02 Valeo Vision Vorrichtung zur Steuerung mehrerer Ladungen wie Lichtquellen und Beleuchtungs- und/oder Signalisierungsvorrichtung eines Fahrzeugs, in das eine solche Steuervorrichtung integriert ist
FR2909831A1 (fr) * 2006-12-08 2008-06-13 Schneider Electric Ind Sas Dispositif a eclairage variable a diodes electroluminescentes
EP1931179A1 (de) * 2006-12-08 2008-06-11 Schneider Electric Industries SAS Variables LED-Beleuchtungssystem
EP1942707A1 (de) * 2007-01-04 2008-07-09 Applied Materials, Inc. Detektor für Lampendefekte
US7923933B2 (en) 2007-01-04 2011-04-12 Applied Materials, Inc. Lamp failure detector
US8106591B2 (en) 2007-01-04 2012-01-31 Applied Materials, Inc. Lamp failure detector
CN101217843B (zh) * 2007-01-04 2012-10-10 应用材料公司 灯故障检测器
DE102007047847B4 (de) * 2007-11-22 2018-02-22 Swarco Traffic Systems Gmbh Verkehrssignalanlage mit Signalgebern und einer Steuereinrichtung zum Steuern von Leuchten in den Signalgebern
DE102007047847A1 (de) * 2007-11-22 2009-06-04 Signalbau Huber Gmbh Lichtsignalanlage mit Signalgebern und einer Steuereinrichtung zum Steuern von Leuchten in den Signalgebern
WO2009074913A1 (en) * 2007-12-10 2009-06-18 Calzoni S.R.L. Light indication system for airport runways, road routes and the like.
US8237590B2 (en) 2008-04-28 2012-08-07 GE Lighting Solutions, LLC Apparatus and method for reducing failures in traffic signals
DE102008048701B4 (de) 2008-09-24 2020-06-04 HELLA GmbH & Co. KGaA Verfahren zum Betrieb einer Reihenschaltung von mindestens zwei LED's
DE102008048701A1 (de) * 2008-09-24 2010-03-25 Hella Kgaa Hueck & Co. Verfahren zum Betrieb einer Reihenschaltung von mindestens zwei LED's
DE102008037551B4 (de) * 2008-11-14 2013-04-18 Lear Corporation Gmbh Vorrichtung zum Betreiben von Leuchtdiodenketten
DE102008037551A1 (de) * 2008-11-14 2010-05-20 Lear Corporation Gmbh Vorrichtung zum Betreiben von Leuchtdiodenketten
WO2010083948A1 (de) * 2009-01-23 2010-07-29 Trumpf Laser Gmbh + Co. Kg Verfahren zur bestimmung der degradation und/oder effizienz von lasermodulen und lasereinheit
CN102292885B (zh) * 2009-01-23 2013-11-06 通快激光两合公司 用于确定激光器模块和激光器单元的退化和/或效率的方法
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FR2778481A1 (fr) 1999-11-12

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