EP0952757A2 - Circuit de commande de l'intensité lumineuse de diodes électroluminescentes controlées en courant pour l'éclairage d'afficheurs - Google Patents

Circuit de commande de l'intensité lumineuse de diodes électroluminescentes controlées en courant pour l'éclairage d'afficheurs Download PDF

Info

Publication number
EP0952757A2
EP0952757A2 EP99107236A EP99107236A EP0952757A2 EP 0952757 A2 EP0952757 A2 EP 0952757A2 EP 99107236 A EP99107236 A EP 99107236A EP 99107236 A EP99107236 A EP 99107236A EP 0952757 A2 EP0952757 A2 EP 0952757A2
Authority
EP
European Patent Office
Prior art keywords
light
emitting diodes
control unit
degradation
memory
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.)
Granted
Application number
EP99107236A
Other languages
German (de)
English (en)
Other versions
EP0952757A3 (fr
EP0952757B1 (fr
Inventor
Dieter Dipl-Ing. Klostermeier (Fh)
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.)
Siemens AG
Original Assignee
Mannesmann VDO AG
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 Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of EP0952757A2 publication Critical patent/EP0952757A2/fr
Publication of EP0952757A3 publication Critical patent/EP0952757A3/fr
Application granted granted Critical
Publication of EP0952757B1 publication Critical patent/EP0952757B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • 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
    • H05B47/28—Circuit arrangements for protecting against abnormal temperature

Definitions

  • the invention relates to a circuit arrangement for adjusting the brightness of current-controlled light-emitting diodes for illuminating a display, in particular for illuminating displays, buttons and switches in vehicles.
  • the proposed circuit arrangement can be used both for controlling active display elements and for backlighting or lighting.
  • Active display elements can e.g. Segment displays or status display fields of an instrument cluster in the dashboard of a vehicle.
  • the invention is based on an arrangement according to DE 196 02 891 A1.
  • An arrangement for adjusting the brightness of a current- or voltage-controlled lamp for illuminating a display is described there, in which, at the end of the display manufacturing process, a correction factor is determined depending on the brightness of the lamp, by means of which the control voltage or the control current of the lamp is set becomes.
  • the correction factor is determined and set with the aid of a light measuring device, which measures the brightness emitted by the illuminant, and with the use of an external test computer which can be connected to the display control unit via a diagnostic interface.
  • the measured brightness value is compared with a table value stored in a memory belonging to the display is deposited.
  • the correction factor can also be taken from a map which characterizes the luminous characteristics of the illuminant.
  • the correction factor taken from a table or a map is then used to influence the control of the illuminant by a change in current or voltage in such a way that the measured brightness value is adapted to the brightness value specified in the memory as the setpoint value.
  • the setting of the control of the lamp made in this way should be retained for the service life of the lamp.
  • control unit can also record and register information about the electrical power and / or the operating temperature of the light-emitting diodes, so that the degradation value is determined in order to set the control current for the light-emitting diodes in accordance with the data for the degradation behavior stored in the memory not only as a function of the registered operating time, but also as a function of the electrical power and / or the operating temperature of the light-emitting diodes.
  • the inclusion of the electrical power in the determination of the degradation value carried out by the control unit for setting the control current for the light-emitting diodes should actually only be dispensed with if this is done by the control unit via the input interface recorded signal for the desired brightness of the light emitting diodes is relatively constant, that is, if a change in the brightness of the light emitting diodes, once set, is not expected or is not intended at all during the period of use of the display.
  • the inclusion of the operating temperature of the light-emitting diodes is therefore a very sensible option because aging, i.e. the degradation behavior of the light-emitting diodes is temperature-dependent to a considerable degree and in many, in particular the automotive applications for the proposed circuit arrangement, operation in a wide temperature range with frequent temperature fluctuations must be expected.
  • the solution found can be designed in such a way that the data representing the degradation behavior of the light-emitting diodes is not only stored in the memory in the form of individual discrete and therefore relatively less punctual values, but also in the form of a curve taken from a data sheet or by means of a formulaic connection or by Parameters for a specific, but not detailed, algorithm describing the degradation behavior, whereby the degradation value to be determined by the control unit can reproduce the actual degradation behavior of the light-emitting diodes in even finer coordination.
  • This way an under-compensation or possibly associated with the proposed tracking of the control current can be achieved Overcompensation of the degradation behavior for the light-emitting diodes can be avoided even better.
  • the main advantage of the solution found is that a constant brightness of the light-emitting diodes can be ensured for a reasonable period of use of the display without the need for external measuring or testing equipment.
  • the control current of the light-emitting diodes is determined on the basis of a Degradation value tracked that the brightness of the light emitting diodes remains constant for a user of the display in spite of their physically determined and thus unavoidable degradation behavior.
  • the control unit updates the degradation value at reasonable time intervals on the basis of data stored in a memory, which characterize the degradation behavior.
  • the update takes place in that the control unit registers the operating time and preferably also the electrical power with which the light-emitting diodes have already been operated as the operating parameters of the light-emitting diodes, and then uses the data stored in the memory, which characterize the degradation behavior, to determine what the degradation value is typically results from the registered operating parameters.
  • This update of the degradation value will only be carried out in the price at reasonable intervals, in order not to unduly burden the control unit with calculations.
  • the control unit Until the next update, the control unit preferably stores the determined degradation value in a memory assigned to the control unit and carries out all the brightness settings for the light-emitting diodes desired until the next update, based on this currently applicable degradation value, by the control unit setting the control current for the light-emitting diodes taking this degradation value into account. Since the degradation value indicates to what extent the brightness of the light-emitting diodes has already decreased compared to their initial brightness, the control current for the light-emitting diodes is tracked in inverse proportion to the degradation value. A prerequisite for a successful application of the proposed circuit arrangement is, of course, that the control current is initially set in such a way that its amount can be tracked without overdriving the light-emitting diodes.
  • the working range for the control current of the light-emitting diodes must therefore be selected such that the limit range of the light-emitting diodes is not reached as far as possible by tracking the control current during the planned period of use of the display.
  • the proposed Circuit arrangement makes a burn-in, which intercepts the initially strong degradation, unnecessary for the light-emitting diodes.
  • the acquisition and registration of the information about the operating parameters required for the determination of the current degradation value ie the information about the operating time, the electrical power and / or the operating temperature
  • the price therefore generally does not require any sensor sensors that work independently, because the control unit, through suitable programming, both the duration of the current flow to the light-emitting diodes and an indication of the amount of the control current can register.
  • the control unit can easily calculate the electrical power of the light emitting diodes as soon as it can refer to the amount of the control current. Since the control current is in many cases provided directly by the control unit, the control unit only needs to register in the memory associated with it how high the control current made available by it in a specific time unit was by storing a corresponding indication. As soon as the control unit logs the behavior of the control current it provides at its output, essential information on the operating parameters is available in order to determine the current degradation value with the data on the degradation behavior of the light-emitting diodes stored in the memory.
  • thermosensor is required to obtain an indication of the operating temperature of the light-emitting diodes, this indication then being fed to the control unit for further processing.
  • the data to be stored in the memory connected to the control unit for setting the control current of the light-emitting diodes can be stored during the manufacturing process of the display to be illuminated with the light-emitting diodes. All that is required is to transfer the information from the manufacturer of the light-emitting diodes into the memory of the circuit arrangement in the form of suitable data.
  • This data can be very easily matched to the exact specification of the light-emitting diodes by an appropriate program selection, so that optimal data is always used for each display. This also simplifies the manufacturing process for a generic display because a selection of the light-emitting diodes used in the manufacturing process of the display, which is dependent on the component specification, can be omitted.
  • the proposed solution will be briefly explained again using a simplified block diagram.
  • the figure shows a display 1 with light-emitting diodes, the control current of which is set by a control unit 2.
  • the control is to be carried out by a pulse width modulated signal (PWM).
  • PWM pulse width modulated signal
  • the control could of course also be carried out analogously with a continuously running current.
  • the control unit 2 receives, via an input interface 6, a signal which is a measure of the desired brightness of the light-emitting diodes.
  • the signal picked up via the input interface 6 can be tapped by a dimmer with which the desired brightness for the light-emitting diodes is set by the user of the display 1.
  • this signal can also be a default value, which e.g. is transmitted from another control device to the device containing display 1 via a CAN data bus.
  • the control unit 2 sets the control current taking into account a degradation value.
  • the control unit 2 detects and registers the operating time of the light-emitting diodes and preferably also their electrical power and - if necessary - their operating temperature. If information on the two operating parameters operating time and electrical power is not recorded directly by the control unit 2, an operating hours counter 3 can be used as a means for recording the operating time, which determines the current flow duration, and the electrical power can also be recorded using a suitable measuring device 4 will. Furthermore, the control unit 2 can be supplied with the signal of a temperature sensor 5 arranged in the vicinity of the light-emitting diodes. The information about the detected operating parameters is fed to the control unit, where it is continuously accumulated and updated and in one of the control unit 2 assigned memory 7 filed.
  • the control unit 2 now uses the current information about at least one of the detected operating parameters to check which degradation value is assigned to them on the basis of the data stored in the memory 7 about the degradation behavior of the light-emitting diodes, and then makes this degradation value available for a corresponding setting of the control current.
  • the control unit provides the control current directly at its output or via suitable drivers is not significant for the present invention.
  • the degradation value will not be updated continuously, but only at reasonable time intervals, e.g. depending on the load on the LEDs, or possibly daily, or depending on brightness reductions that the human eye perceives as different brightnesses in the respective operating environment of the display can be.
  • the memory 7, in which the data for the operating parameters operating time, electrical power or operating temperature for collecting the degradation value is collected, is to be designed as a non-volatile memory (EEPROM or flash). It is expedient in this memory 7 also to store the data for the degradation behavior of the light-emitting diodes, which can be given by table values, data sheet curves or parameters for algorithms to be executed by the control unit 2. Which data are to be stored advantageously in which form will have to be decided on a case-by-case basis depending on the application and the available capacity of the memory 7.

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Control Of El Displays (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP99107236A 1998-04-25 1999-04-14 Circuit de commande de l'intensité lumineuse de diodes électroluminescentes controlées en courant pour l'éclairage d'afficheurs Expired - Lifetime EP0952757B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19818621 1998-04-25
DE19818621A DE19818621A1 (de) 1998-04-25 1998-04-25 Schaltungsanordnung zur Einstellung der Helligkeit stromgesteuerter Leuchtdioden zur Beleuchtung einer Anzeige

Publications (3)

Publication Number Publication Date
EP0952757A2 true EP0952757A2 (fr) 1999-10-27
EP0952757A3 EP0952757A3 (fr) 2001-03-07
EP0952757B1 EP0952757B1 (fr) 2004-08-04

Family

ID=7865835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99107236A Expired - Lifetime EP0952757B1 (fr) 1998-04-25 1999-04-14 Circuit de commande de l'intensité lumineuse de diodes électroluminescentes controlées en courant pour l'éclairage d'afficheurs

Country Status (2)

Country Link
EP (1) EP0952757B1 (fr)
DE (2) DE19818621A1 (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1098550A2 (fr) * 1999-11-05 2001-05-09 Avix Inc. Lampe à diodes Led
WO2001045471A1 (fr) * 1999-12-14 2001-06-21 Efos Inc. Lampe intelligente
WO2002035894A1 (fr) * 2000-10-27 2002-05-02 Koninklijke Philips Electronics N.V. Circuit
WO2002047438A2 (fr) * 2000-12-07 2002-06-13 Koninklijke Philips Electronics N.V. Led luminary system
WO2006022867A2 (fr) 2004-08-09 2006-03-02 Dialight Corporation Circuit de commande intelligent pour generateur de lumiere comportant des diodes electroluminescentes (led)
WO2006111133A1 (fr) * 2005-04-19 2006-10-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Module de diode electroluminescente et systeme d'eclairage a diodes electroluminescentes comprenant plusieurs modules de diode electroluminescente
FR2900304A1 (fr) * 2006-04-20 2007-10-26 Valeo Vision Sa Dispositif de commande de led pour un feu de vehicule
WO2009037720A1 (fr) * 2007-09-17 2009-03-26 Wissen Lux S.P.A. Dispositif d'éclairage à del
EP1881743A3 (fr) * 2006-07-10 2010-04-28 Toshiba Lighting & Technology Corporation Appareil d'éclairage
EP2315498A1 (fr) * 2005-03-30 2011-04-27 Lumination, LLC Signal intelligent de trafic de DEL détectant la dégradation de lumière
WO2011061035A1 (fr) * 2009-11-20 2011-05-26 Osram Opto Semiconductors Gmbh Dispositif électroluminescent
WO2012129144A1 (fr) * 2011-03-22 2012-09-27 GE Lighting Solutions, LLC Système et procédé d'enregistrement de défaillance d'un feu de circulation à del
DE102011016360A1 (de) * 2011-04-07 2012-10-11 Infineon Technologies Ag Fahrzeugbeleuchtungsanordnung
AT504583B1 (de) * 2006-11-20 2013-06-15 Zumtobel Lighting Gmbh Verfahren zum betreiben einer lichtquelle sowie lampenbetriebsgerät hierfür
EP2482616A3 (fr) * 2011-01-31 2015-01-28 Toshiba Lighting & Technology Corporation Dispositif d'éclairage et luminaire
EP3217766A1 (fr) * 2016-03-11 2017-09-13 ITZ Innovations- und Technologiezentrum GmbH Procédé de fonctionnement d'une ampoule
WO2018197204A1 (fr) * 2017-04-24 2018-11-01 Volkswagen Aktiengesellschaft Unité d'éclairage et d'indication de niveau de marche
WO2019138029A1 (fr) * 2018-01-12 2019-07-18 Osram Opto Semiconductors Gmbh Procédé pour commander un courant d'une diode électroluminescente
EP3453232A4 (fr) * 2016-05-02 2020-07-29 Growflux Inc. Système et procédé pour un éclairage horticole avancé

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10113248A1 (de) * 2001-03-19 2002-10-02 Able Design Ges Fuer Entwicklu Verfahren zur Kompensation des Einbrennens von Plasma-Bildschirmen
DE10146191A1 (de) * 2001-09-17 2003-04-10 Ackermann Albert Gmbh Co Verfahren zur Leuchtmittelüberwachung von Lichtrufsystemen und Lichtrufsystem
DE10160667A1 (de) * 2001-12-11 2003-06-26 Cherry Gmbh Verfahren und Vorrichtung zur Ansteuerung von Elektrolumineszenz-Elementen
DE102007024078A1 (de) * 2007-03-23 2008-10-02 Visteon Global Technologies, Inc., Van Buren Township Ansteuereinheit für eine Lichtquelle eines beleuchteten Anzeige- und/oder Bedienelement sowie Verfahren und Vorrichtung zu dessen Kalibrierung
DE102007031801A1 (de) * 2007-07-07 2009-01-08 Bayerische Motoren Werke Aktiengesellschaft Kraftfahrzeugleuchtensystem
DE102009014998A1 (de) 2009-03-26 2010-09-30 Tridonicatco Gmbh & Co. Kg Dimmbares Betriebsgerät und Beleuchtungssystem zur Erhöhung der Lebenserwartung bei LEDs und OLEDs
DE102011006696A1 (de) * 2011-04-04 2012-10-04 Zf Friedrichshafen Ag Leistungselektronikbaugruppe
DE102011084951A1 (de) * 2011-10-21 2013-04-25 Zumtobel Lighting Gmbh LED-Leuchte mit einstellbarer Helligkeit
DE102016213192A1 (de) * 2016-07-19 2018-01-25 BSH Hausgeräte GmbH Reduktion von Helligkeitsunterschieden beim Betrieb einer Beleuchtungsvorrichtung eines Haushaltsgeräts mit mehreren Leuchtmitteln

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992005608A1 (fr) * 1990-09-14 1992-04-02 Finisar Corporation Dispositif de commande de diode laser a semi-conducteur et procede de commande de polarisation de diode laser
EP0497431A1 (fr) * 1987-04-13 1992-08-05 Sharp Kabushiki Kaisha Appareil pour commander un dispositif à laser à semi-conducteur
EP0583186A1 (fr) * 1992-07-30 1994-02-16 France Telecom Dispositif de contrôle de la puissance de sortie des diodes laser
EP0669684A2 (fr) * 1991-05-10 1995-08-30 Fujitsu Limited Appareil pour commander un laser semi-conducteur afin de conserver la longévité d'un laser semi-conducteur en détectant l'augmentation de courant du laser semi-conducteur à partir de l'état initial de celui-ci
EP0702347A1 (fr) * 1994-07-18 1996-03-20 Kabushiki Kaisha Toshiba Dispositif d'affichage à matrice de points à diodes électroluminescentes et méthode pour le réglage de sa luminosité
DE19540326A1 (de) * 1995-10-28 1997-04-30 Bosch Gmbh Robert Scheinwerfer für Fahrzeuge
DE19602891A1 (de) * 1996-01-27 1997-08-07 Kammerer Gmbh M Verfahren und Anordnung zur Einstellung der Helligkeit eines strom- oder spannungsgesteuerten Leuchtmittels zur Hinterleuchtung einer Anzeige, insbesondere für Kraftfahrzeuge
US5719675A (en) * 1992-06-16 1998-02-17 Honeywell Inc. Laser gyro life prediction

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0497431A1 (fr) * 1987-04-13 1992-08-05 Sharp Kabushiki Kaisha Appareil pour commander un dispositif à laser à semi-conducteur
WO1992005608A1 (fr) * 1990-09-14 1992-04-02 Finisar Corporation Dispositif de commande de diode laser a semi-conducteur et procede de commande de polarisation de diode laser
EP0669684A2 (fr) * 1991-05-10 1995-08-30 Fujitsu Limited Appareil pour commander un laser semi-conducteur afin de conserver la longévité d'un laser semi-conducteur en détectant l'augmentation de courant du laser semi-conducteur à partir de l'état initial de celui-ci
US5719675A (en) * 1992-06-16 1998-02-17 Honeywell Inc. Laser gyro life prediction
EP0583186A1 (fr) * 1992-07-30 1994-02-16 France Telecom Dispositif de contrôle de la puissance de sortie des diodes laser
EP0702347A1 (fr) * 1994-07-18 1996-03-20 Kabushiki Kaisha Toshiba Dispositif d'affichage à matrice de points à diodes électroluminescentes et méthode pour le réglage de sa luminosité
DE19540326A1 (de) * 1995-10-28 1997-04-30 Bosch Gmbh Robert Scheinwerfer für Fahrzeuge
DE19602891A1 (de) * 1996-01-27 1997-08-07 Kammerer Gmbh M Verfahren und Anordnung zur Einstellung der Helligkeit eines strom- oder spannungsgesteuerten Leuchtmittels zur Hinterleuchtung einer Anzeige, insbesondere für Kraftfahrzeuge

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1098550A3 (fr) * 1999-11-05 2002-08-14 Avix Inc. Lampe à diodes Led
SG92752A1 (en) * 1999-11-05 2002-11-19 Avix Inc Led lamp
AU779265B2 (en) * 1999-11-05 2005-01-13 Avix Inc. Led lamp
EP1098550A2 (fr) * 1999-11-05 2001-05-09 Avix Inc. Lampe à diodes Led
WO2001045471A1 (fr) * 1999-12-14 2001-06-21 Efos Inc. Lampe intelligente
WO2002035894A1 (fr) * 2000-10-27 2002-05-02 Koninklijke Philips Electronics N.V. Circuit
CN1319417C (zh) * 2000-12-07 2007-05-30 皇家菲利浦电子有限公司 Led发光***
WO2002047438A2 (fr) * 2000-12-07 2002-06-13 Koninklijke Philips Electronics N.V. Led luminary system
WO2002047438A3 (fr) * 2000-12-07 2002-10-31 Koninkl Philips Electronics Nv Led luminary system
EP1776847A2 (fr) * 2004-08-09 2007-04-25 Dialight Corporation Circuit de commande intelligent pour generateur de lumiere comportant des diodes electroluminescentes (led)
EP1776847A4 (fr) * 2004-08-09 2010-06-09 Dialight Corp Circuit de commande intelligent pour generateur de lumiere comportant des diodes electroluminescentes (led)
WO2006022867A2 (fr) 2004-08-09 2006-03-02 Dialight Corporation Circuit de commande intelligent pour generateur de lumiere comportant des diodes electroluminescentes (led)
EP2315498A1 (fr) * 2005-03-30 2011-04-27 Lumination, LLC Signal intelligent de trafic de DEL détectant la dégradation de lumière
WO2006111133A1 (fr) * 2005-04-19 2006-10-26 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH Module de diode electroluminescente et systeme d'eclairage a diodes electroluminescentes comprenant plusieurs modules de diode electroluminescente
US8419243B2 (en) 2006-04-20 2013-04-16 Valeo Vision LED control device for a vehicle light
FR2900304A1 (fr) * 2006-04-20 2007-10-26 Valeo Vision Sa Dispositif de commande de led pour un feu de vehicule
US7871187B2 (en) 2006-04-20 2011-01-18 Valeo Vision LED control device for a vehicle light
EP1881743A3 (fr) * 2006-07-10 2010-04-28 Toshiba Lighting & Technology Corporation Appareil d'éclairage
DE102006054512B4 (de) * 2006-11-20 2016-01-14 Zumtobel Lighting Gmbh Verfahren zum Betreiben einer Lichtquelle sowie Lampenbetriebsgerät hierfür
AT504583B1 (de) * 2006-11-20 2013-06-15 Zumtobel Lighting Gmbh Verfahren zum betreiben einer lichtquelle sowie lampenbetriebsgerät hierfür
WO2009037720A1 (fr) * 2007-09-17 2009-03-26 Wissen Lux S.P.A. Dispositif d'éclairage à del
WO2011061035A1 (fr) * 2009-11-20 2011-05-26 Osram Opto Semiconductors Gmbh Dispositif électroluminescent
US8946999B2 (en) 2009-11-20 2015-02-03 Osram Opto Semiconductors Gmbh Light emitting device
EP2482616A3 (fr) * 2011-01-31 2015-01-28 Toshiba Lighting & Technology Corporation Dispositif d'éclairage et luminaire
US9524641B2 (en) 2011-03-22 2016-12-20 GE Lighting Solutions, LLC LED traffic signal fault logging system and method
CN103443836A (zh) * 2011-03-22 2013-12-11 通用电气照明解决方案有限责任公司 Led交通信号故障记录***和方法
WO2012129144A1 (fr) * 2011-03-22 2012-09-27 GE Lighting Solutions, LLC Système et procédé d'enregistrement de défaillance d'un feu de circulation à del
DE102011016360B4 (de) 2011-04-07 2019-10-02 Infineon Technologies Ag Fahrzeugbeleuchtungsanordnung, Leuchtmitteltreiberschaltung und Verfahren zur Bereitstellung von Informationen zur Bestimmung eines Beleuchtungszustandes
DE102011016360A1 (de) * 2011-04-07 2012-10-11 Infineon Technologies Ag Fahrzeugbeleuchtungsanordnung
EP3217766A1 (fr) * 2016-03-11 2017-09-13 ITZ Innovations- und Technologiezentrum GmbH Procédé de fonctionnement d'une ampoule
EP3453232A4 (fr) * 2016-05-02 2020-07-29 Growflux Inc. Système et procédé pour un éclairage horticole avancé
US10863598B2 (en) 2016-05-02 2020-12-08 Growflux Llc System and method for advanced horticultural lighting
US11592168B2 (en) 2016-05-02 2023-02-28 Growflux Inc. System and method for advanced horticultural lighting
WO2018197204A1 (fr) * 2017-04-24 2018-11-01 Volkswagen Aktiengesellschaft Unité d'éclairage et d'indication de niveau de marche
US10794486B2 (en) 2017-04-24 2020-10-06 Volkswagen Aktiengesellschaft Gear indicator illumination unit
WO2019138029A1 (fr) * 2018-01-12 2019-07-18 Osram Opto Semiconductors Gmbh Procédé pour commander un courant d'une diode électroluminescente
US11497098B2 (en) * 2018-01-12 2022-11-08 Osram Oled Gmbh Method for controlling a current of a light-emitting diode

Also Published As

Publication number Publication date
DE19818621A1 (de) 1999-10-28
EP0952757A3 (fr) 2001-03-07
DE59910096D1 (de) 2004-09-09
EP0952757B1 (fr) 2004-08-04

Similar Documents

Publication Publication Date Title
EP0952757A2 (fr) Circuit de commande de l'intensité lumineuse de diodes électroluminescentes controlées en courant pour l'éclairage d'afficheurs
DE4119204C2 (de) Ansteuerschaltung für eine Elektroluminiszenz-Leuchte zur Konstanthaltung der Leuchtenintensität während der Leuchtenlebensdauer
DE102006037342B4 (de) Schaltung für ein Kraftfahrzeug, insbesondere zur Ansteuerung einer Beleuchtungseinrichtung
DE102005049579A1 (de) Lichtquelle, die mischfarbiges Licht aussendet, und Verfahren zur Steuerung des Farbortes einer solchen Lichtquelle
DE60101251T2 (de) Gerät und Verfahren zur Heizung einer Entladunslampenkathode
EP0786714A2 (fr) Procédé et dispositif de réglage d'intensité d'un moyen d'éclairage commandé en courant ou tension pour éclairage arrière d'un moyen d'affichage spécialement pour véhicules automobiles
DE20023993U1 (de) Ansteuerschaltung für Leuchtdioden
DE19619281A1 (de) System und Steuereinrichtung zum Steuern der Helligkeit eines Raumes
DE102007054421A1 (de) Elektromotorische Antriebsanordnung
DE102015108217B3 (de) Technik zur Einstellung der Helligkeit von LED-Lampen
DE10336441A1 (de) Verfahren zur Regelung des Speicherdrucks eines Druckluftspeichers einer Niveauregelanlage für ein Kraftfahrzeug
DE3531560C2 (fr)
DE102013224760B4 (de) Treiberschaltung und Verfahren zum Betrieb einer dimmbaren LED-Strecke in einem Dimmbereich mit zwei Bereichen
DE4220522A1 (de) Schlauchkennung
DE102012210905B4 (de) Mikroskop mit einer Beleuchtungseinrichtung
DE19917091C1 (de) Vorrichtung zur Einstellung der Helligkeit eines Leuchtmittels, bei welcher durch den Benutzer wählbar sowohl sprunghaftes als auch stetiges Dimmen möglich ist
DE202007015857U1 (de) Helligkeitsregelung für elektrische Lichtquellen
DE102009045650B4 (de) Verfahren zur Regelung einer Anzeigevorrichtung
DE2715484C3 (de) Anzeigeeinrichtung
WO2010124902A2 (fr) Procédé et dispositif pour régler une valeur de consigne de luminosité d'une lampe
WO2003019513A1 (fr) Procede et dispositif de commande de l'eclairage d'un terminal en fonction de l'intensite lumineuse ambiante mesuree
DE102010001798A1 (de) Verfahren zum Betreiben einer Leuchtdiodenanordnung sowie Schaltanordnung
EP0974246B1 (fr) Procede et circuit pour faire fonctionner un element electrique lumineux
WO2020126731A1 (fr) Dispositif d'affichage pour un véhicule électrique
DE102019208960A1 (de) Verfahren zum Betrieb eines Dimmers

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB NL SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

RIC1 Information provided on ipc code assigned before grant

Free format text: 7H 05B 33/08 A, 7H 01S 3/103 B, 7H 05B 37/03 B

17P Request for examination filed

Effective date: 20010619

AKX Designation fees paid

Free format text: DE FR GB NL SE

17Q First examination report despatched

Effective date: 20011128

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: SIEMENS AKTIENGESELLSCHAFT

RIC1 Information provided on ipc code assigned before grant

Ipc: 7H 05B 37/03 B

Ipc: 7H 05B 33/08 A

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB NL SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59910096

Country of ref document: DE

Date of ref document: 20040909

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20041013

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20050506

REG Reference to a national code

Ref country code: NL

Ref legal event code: TD

Effective date: 20101130

Ref country code: NL

Ref legal event code: SD

Effective date: 20101130

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20110825 AND 20110831

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20130418

Year of fee payment: 15

Ref country code: SE

Payment date: 20130418

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20130418

Year of fee payment: 15

Ref country code: FR

Payment date: 20130515

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20140430

Year of fee payment: 16

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20141101

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20140414

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20141231

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140415

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140414

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140430

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141101

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59910096

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151103