EP2744302A1 - Procédé et dispositif de fonctionnement d'un dispositif d'éclairage d'un véhicule automobile - Google Patents

Procédé et dispositif de fonctionnement d'un dispositif d'éclairage d'un véhicule automobile Download PDF

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Publication number
EP2744302A1
EP2744302A1 EP13191936.7A EP13191936A EP2744302A1 EP 2744302 A1 EP2744302 A1 EP 2744302A1 EP 13191936 A EP13191936 A EP 13191936A EP 2744302 A1 EP2744302 A1 EP 2744302A1
Authority
EP
European Patent Office
Prior art keywords
semiconductor light
light sources
operating
current
operating current
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Withdrawn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
EP13191936.7A
Other languages
German (de)
English (en)
Inventor
Dirk Blum
Michael Schnerr
Uwe Bormann
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.)
Marelli Automotive Lighting Reutlingen Germany GmbH
Original Assignee
Automotive Lighting Reutlingen GmbH
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 Automotive Lighting Reutlingen GmbH filed Critical Automotive Lighting Reutlingen GmbH
Publication of EP2744302A1 publication Critical patent/EP2744302A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
    • F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • 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
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines

Definitions

  • the present invention relates to a method for operating a lighting device of a motor vehicle, wherein a plurality of semiconductor light sources of the lighting device are connected in parallel to each other and switched semiconductor light sources are powered by at least one power source with energy. Moreover, the invention relates to an electrical control and / or regulating device for operating a lighting device of a motor vehicle according to the preamble of claim 9 and a lighting device of a motor vehicle according to the preamble of claim 11.
  • Headlamps are in the front of a vehicle arranged. They serve in addition to road safety by visualizing the vehicle for other road users in particular the illumination of the road ahead of the vehicle, especially in the form of low beam, high beam, fog light or any other, eg. Adaptive light distribution to the view for the driver of the vehicle improve.
  • Lights are mainly used for traffic safety by visualizing the vehicle for other road users.
  • front lights in the front of the vehicle for example, as a position light, flashing or daytime running lights and tail lights in the rear of the vehicle, for example, as a brake light, tail light or flashing light used.
  • the front lights can be integrated in a headlight, but they can also be designed as separate lights and arranged in the front of the vehicle.
  • a luminaire can fulfill one or more luminaire functions. In a tail light usually several lighting functions are integrated.
  • Headlamps may have at least one incandescent lamp, halogen lamp or gas discharge lamp as a light source, for example;
  • Luminaires can be used as light source e.g. Have light bulbs. But headlights and lights are also more and more with semiconductor light sources, in particular light emitting diodes (LEDs), operated as a light source.
  • LEDs light emitting diodes
  • a plurality of semiconductor light sources can also be combined into an array and operated in a matrix-like manner. It is possible that temporarily only a part of the semiconductor light sources arranged in the array is operated simultaneously.
  • a so-called semiconductor chip comprises one or more Semiconductor light sources.
  • the semiconductor light sources or the semiconductor chips are preferably operated in the prior art in a plurality of paths connected in parallel with each path comprising at least one semiconductor light source.
  • the semiconductor light sources are operated either by a current source per semiconductor chip (comprising one or more light-emitting diodes) or per path or by a common voltage source for all paths, in the latter case switching elements are arranged in the paths and the operating current per path by opening or closing the switching elements is regulated, wherein the operating current results by averaging.
  • a high sampling rate for determining the current current values and an integrator for averaging is required in the control circuit.
  • A1 is a lighting device of a motor vehicle which has a plurality of parallel paths connected to each other, wherein in each path, a series connection of a plurality of light-emitting diodes is arranged.
  • the lighting device is operated by a common voltage source for all paths and by a current source per path, using a control arrangement for regulating the operating voltage.
  • the control arrangement operates at a high sampling rate and includes an integrator for averaging.
  • the object of the invention is to design a lighting device of the type mentioned in such a way and to further develop that it can be operated very efficiently.
  • the circuit complexity and the required installation space should be as low as possible.
  • a method for operating a lighting device of the aforementioned type in which all switched semiconductor light sources are powered by a common power source with energy, wherein a predetermined total operating current is provided by the power source corresponding to the number of semiconductor light sources turned on.
  • the circuit complexity is reduced by supplying a plurality of semiconductor light sources, for example all semiconductor light sources of an LED array, with energy by a single current source.
  • the semiconductor light sources individually assigned power sources are no longer necessary.
  • the necessary sum operating current for operating all switched semiconductor light sources can be determined in a control and / or regulating device and then the current source can be switched so that each semiconductor light source can be operated properly with a suitable constant current.
  • the control and / or regulating device provides a sum operating current for all semiconductor light sources or for all paths connected in parallel with one another.
  • the sum operating current generated by the current source can therefore be predetermined by signals of the control and / or regulating device, depending on the number of semiconductor light sources that are switched on.
  • the total operating current can thus be controlled or regulated with a reduced number of components and a much greater sampling rate than previously required.
  • in the invention can be dispensed with an integrator for averaging.
  • the lower drive frequency also increases the energy efficiency of the components used.
  • the sum operating current is divided automatically into the semiconductor light sources or paths with semiconductor light sources, which are preferably connected in parallel with one another.
  • the electrical properties of the semiconductor light sources or of the paths in which the semiconductor light sources are arranged can be set in different ways.
  • the individual operating current resulting in the semiconductor light sources or the paths is automatically adjusted.
  • the invention is based on the idea to replace the hitherto customary complicated control of the individual operating currents in the individual semiconductor light sources or paths by a single, common for all semiconductor light sources and paths total current control.
  • only one common current source is required for all paths or all semiconductor light sources whose operating current is controlled and / or regulated, and an integrator can be dispensed with.
  • a clear cost and space reduction and improved efficiency are achieved.
  • all switched semiconductor light sources are operated with an identical operating current. If the semiconductor light sources are arranged in a plurality of parallel paths, the individual operating currents in the individual paths are the same.
  • the illumination device may preferably be designed such that in each case an equal number of semiconductor light sources, preferably all of the same type, is arranged in a plurality of parallel paths of the illumination device.
  • Semiconductor light sources of the same type preferably have the same electrical properties. Thus, the paths have the same electrical properties.
  • As an electrical property in particular the ohmic resistance of the path or the semiconductor light sources arranged therein is considered here. This ensures that the sum of the operating current generated by the power source evenly divided on all paths. Due to the identical operating current intensity for the paths or the semiconductor light sources, it can be achieved that all switched semiconductor light sources radiate with the same brightness, which leads to a particularly homogeneous light distribution and color of the light generated by the illumination device.
  • At least one of the semiconductor light sources or at least one of the paths connected in parallel to one another is assigned a switch, by means of which the current flow through the semiconductor light source can be switched on and off.
  • all semiconductor light sources or all paths associated with a separate switch are preferably designed as electrically controllable switches, in particular as transistors or thyristors.
  • the switches are preferably controlled by means of an electrical drive signal of an electrical control and / or regulating device of the illumination device.
  • the switches are preferably arranged in series with the at least one semiconductor light source arranged in the path.
  • the control and / or regulating device can switch on as many semiconductor light sources or paths of the illumination device as semiconductor light sources are necessary or desired for realizing a desired light distribution or light function of the illumination device.
  • the control and regulating device is thus aware of the Number of activated paths or the switched semiconductor light sources and can adjust the total operating current by means of control or simplified control in a particularly simple manner.
  • the total operating current of the current source is determined and set by the control and / or regulating device in such a way that it is ensured that an operating current flows through each semiconductor light source or through all the semiconductor light sources arranged in a path, which for proper operation of the semiconductor light source (s). in the required or desired manner, ie for generating the desired light distribution and the desired light color, etc., is necessary.
  • the operating current intensity for operating at least one of the semiconductor light sources or the semiconductor light sources of at least one of the paths is adjusted by means of an ohmic resistor arranged in series with the at least one semiconductor light source.
  • an ohmic resistor arranged in series with the at least one semiconductor light source.
  • different types of semiconductor light sources with different electrical properties can also be used in the illumination device.
  • the different electrical properties of the semiconductor light sources can also result due to manufacturing tolerances.
  • the different electrical properties of the semiconductor light sources can be taken into account by selecting and arranging a suitable resistor, preferably an ohmic resistor, in series with the semiconductor light sources or in a path of the semiconductor light sources and compensating their effects.
  • a different number of semiconductor light sources in the individual paths can be taken into account by the arrangement of suitable resistors. At least one of the ohmic resistor arranged in series with the at least one semiconductor light source.
  • Resistors may also be temperature-dependent changeable, for example, to take into account a change in resistance of the semiconductor light source (s) in a path which increases during operation of the semiconductor light source and the associated heating.
  • the ohmic resistance may be greater and smaller by heating, so that the sum of ohmic resistance and resistance of the semiconductor light sources and thus the current in the path or by the semiconductor light source (s) of the path from the beginning over the total operating time remains approximately constant.
  • the ohmic resistors are preferably selected in series with the semiconductor light sources or in the paths such that equal operating currents are established in the individual paths of the illumination device.
  • the semiconductor light sources are tolerated so that the total operating current strength is automatically and substantially evenly distributed over the individual paths within a tolerable value range.
  • the operating current intensity for operating at least one of the semiconductor light sources of a path is adjusted by means of path-wise pulse width modulation.
  • a switching element is arranged in each of the parallel paths. These are, for example, a switching element which can be activated by means of a control signal of the control or regulating device and which can preferably switch at a relatively high frequency.
  • the switching element is designed as a transistor or as a thyristor or as a network with a plurality of such switching elements.
  • the current is determined in each path and in the control and / or Control device evaluated.
  • the determination of the current intensity in a path can be easily determined on the basis of the number and arrangement of the activated or deactivated semiconductor light sources, which are known to the control or regulating device, without requiring a constant current measurement with a high sampling rate.
  • the switching element arranged in the path is correspondingly activated so that the current is alternately switched on or off and the desired individual operating current in the path is established by averaging the on or off periods.
  • a pulse width modulation of the sum of the operating current of the current source is also conceivable, then a common switching element is provided for all paths, which is controlled by means of a corresponding drive signal from the control or regulating device in dependence on the number and arrangement of the activated or deactivated semiconductor light sources.
  • a light request of the illumination device for the individual semiconductor light sources can be taken into account.
  • an operating current in the paths is pulse width modulated as a function of the light requirement by a control algorithm by means of the switching elements arranged in the paths. If the total operating current is also controlled by pulse width modulation, the two duty cycles (the total operating current control and the individual operating current control of the individual paths) can be superimposed.
  • individual paths and the semiconductor light sources arranged therein can be selectively switched on or off depending on the desired light function.
  • FIG. 1 shows a lighting device according to the invention in section and in a simplified representation.
  • the lighting device is designated in its entirety by the reference numeral 10.
  • the lighting device 10 may be designed as a headlight or as a lamp, preferably for use in a motor vehicle. In the example of FIG. 1 the lighting device 10 is designed as a headlight.
  • the lighting device 10 comprises a housing 12 which is preferably made of plastic.
  • the housing 12 In a light exit direction 14, the housing 12 has a light exit opening, which is closed by a translucent cover 16.
  • the cover 16 may be formed as a clear disc without optically active elements or at least partially with optically active elements (not shown) as a diffuser.
  • the cover 16 is made of plastic or glass.
  • a light module 18 is arranged inside the housing 12.
  • the light module 18 serves to generate a desired light distribution which has a certain horizontal and vertical extent and a certain illuminance value distribution in the illuminated area.
  • the illumination device 10 could serve in the front region of a vehicle, for example for generating a position light, flashing light or daytime running light or in the rear region of a vehicle. For generating a brake light, flashing light or a tail light.
  • the light module 18 has a printed circuit board 20, which in the illustrated example is equipped with three semiconductor light sources 22.
  • the semiconductor light sources 22 are preferably designed as light-emitting diodes (LEDs). They are preferably of the same type, that is they have almost the same electrical and optical properties.
  • the electrical properties relate to, for example, the operating current, the operating voltage or the ohmic resistance and / or its temperature dependence.
  • the optical properties relate, for example, the illuminance (lux), the light intensity (candela), the luminous flux (candela-sr, lumens) and / or the light color (color temperature in Kelvin).
  • the selected number of semiconductor light sources 22 and their arrangement on the circuit board 20 are exemplary and may be provided as desired differently.
  • the semiconductor light sources 22 can form a so-called array in one or more rows and / or columns, preferably a so-called 1x3 array (1 column, 3 rows or 3 columns, 1 row), wherein the semiconductor light sources 22 of the 1x3- Arrays can preferably be switched individually and controlled. Any other number and arrangement of the LEDs 22 is also conceivable.
  • the light module 18 also includes an optical array 24 having a plurality of primary optics for converging the light beams emitted from the semiconductor light sources 22.
  • the primary optics are formed, for example, as attachment optics 26.
  • the attachment optics 26 may be connected to each other so that the primary optics 24 forms a unit, or they may be formed separately and separately from each other, so that the primary optics 24 is formed in several parts.
  • the attachment optics 26 are preferably solid and consist of a transparent material, in particular plastic or glass.
  • each semiconductor light source 22 is assigned its own optical attachment 26. A majority of the light emitted by one of the semiconductor light sources 22 is coupled into the corresponding optical attachment 26 via a light input surface. A portion of the injected light passes directly to the light output surface and is decoupled via this from the optical attachment 26.
  • the optical array 24 generates the desired light distribution of the light module 18 either alone or in cooperation with other optical elements, for example a projection lens (not shown) be associated with multiple reflectors or be assigned a differently configured optical array 24.
  • a heat sink 28 for Heat dissipation On a semiconductor light sources 22 opposite side of the circuit board 20 is a heat sink 28 for Heat dissipation arranged. This is preferably formed substantially more massive than the circuit board 20.
  • the heat sink 28 preferably comprises cooling fins or cooling pins 28a for surface enlargement.
  • an active cooling element for example in the form of a fan, may be provided in order to improve the cooling effect achievable by the heat sink 28.
  • the heat sink 28 dissipates the heat generated during operation of the LEDs 22 from the LEDs 22 in order to avoid overheating.
  • the light module 18 is operated by a control and / or regulating device 30.
  • the control and / or regulating device 30 is assigned a current source 32. This can be an integral part of the control and / or regulating device 30 (cf. FIG. 1 ), but it may also be a separate device outside the control and / or regulating device 30 inside or outside the housing 12 of the illumination device 10.
  • the current source 32 is ideally characterized by the fact that it always tries, regardless of a connected electrical load, to provide the same amperage available.
  • an electrical supply line 34 is disposed, between the control and / or regulating device 30 and the circuit board 20, a signal line 36 is additionally arranged, via the drive signals for the light module 18 and the LEDs 22 and other components the LED circuitry can be transmitted.
  • the lines 34 and 36 serve to operate the semiconductor light sources 22 according to the inventive method. But it is also conceivable that the lines 34 and 36 are formed as a common line, via which both the drive signals and the supply energy are transmitted.
  • FIG. 2 shows a circuit arrangement for operating the semiconductor light sources 22 of the illumination device 10 FIG. 1 in a first embodiment. Exemplary are in FIG. 2 three semiconductor light sources 22 shown.
  • the semiconductor light sources 22 are each connected individually in a separate path 38 in parallel with each other and are electrically supplied by the power source 32 via the supply line 34.
  • Each path 38 could also include more than one semiconductor light source 22 in series with, or in parallel with, the LED 22 shown.
  • Each path 38 may comprise an arbitrarily configured electrical network of a plurality of parallel and / or serially connected LEDs 22.
  • a switching element 40 in each case is arranged in series with the at least one semiconductor light source 22.
  • the switching elements 40 are preferably designed as electrically controllable switching elements, particularly preferably semiconductor switching elements, in particular transistors or thyristors or as networks of such switching elements.
  • the switching elements 40 are preferably arranged on the printed circuit board 20. Each switching element 40 can be controlled and switched separately via its own signal line 36 by the control and / or regulating device 30 in order to switch on or off a predetermined number of semiconductor light sources 22 in the light module 18.
  • control unit 30 can control the switch 40 in one of the paths 38 in such a way that the switch 40 opens, the current flow through the corresponding path 38 is interrupted and the LED 22 arranged therein is disabled.
  • the number of LEDs 22 to be activated may be, for example, due to requirements for a to be achieved Light distribution of the light module 18 or due to the operation of the lighting device 10 in a particular country, with different legal requirements apply to a light distribution in different countries.
  • the semiconductor light sources 22 have almost identical electrical properties, so that the sum operating current provided by the current source 32 is divided equally into the paths 38. Thus, in each of the switched paths 38, the same current flows. Also, the optical properties of the semiconductor light sources 22 are preferably almost equal, so that the semiconductor light sources 22 all shine with a largely equal intensity and the same light color. For this reason, in this first embodiment a symmetrization of the paths 38, for example via resistors 42 (cf. FIGS. 3 and 4 ), not necessary.
  • the control and / or regulating device 30 must the sum operating current corresponding to the number of active LEDs Set 22 or paths 38.
  • the total operating current is controlled or regulated to a current that is needed for the LEDs 22 switched on. Actuation of the switches 40 in the paths 38 can thus also have effects on the sum operating current.
  • the control and / or regulating device 30 controls the individual switches 40 and at the same time predefines the current source 32 as to which current intensity is to be made available as a sum operating current. By this procedure, a path-wise adjustment of the respective operating current by means of pulse width modulation can be achieved by the switches 40 be used for the realization of a pulse width modulation, that is, with a certain duty cycle on and off.
  • the total operating current flowing via the operating line 34 must be adjustable depending on the number of currently switched semiconductor light sources 22.
  • the sum operating current can be controlled or regulated according to the number of semiconductor light sources 22 to be operated.
  • the current source 32 can be controlled by the control and / or regulating device 30 in such a way that it provides the respectively required total operating current. Due to the activation of the switching elements 40, the control and / or regulating device 30 has information regarding the currently active semiconductor light sources 22 and can accordingly set the required magnitude of the total operating current.
  • the sum operating current is regulated, such a control can be realized substantially simply due to the knowledge of the number of active LEDs 22 and the resulting total operating current required.
  • the operating frequency of the control can be significantly reduced because the scheme still works sufficiently quickly and reliably with a much higher sampling rate than in known controls.
  • a desired value for the control can be newly specified as soon as an LED 22 is switched on or off.
  • a pulse width modulation device (not shown) may be arranged, which may vary the sum operating current by means of pulse width modulation.
  • the duty cycle of the pulse width modulation is adjusted so that sets a desired total operating current over the time average. This preferably corresponds to the number of active semiconductor light sources 22.
  • FIG. 3 shows a circuit arrangement for operating the semiconductor light sources 22 in a second embodiment. Unlike the first embodiment ( FIG. 2 ) is in each path 38 in addition to the at least one semiconductor light source 22 and the switching element 40 in addition an ohmic resistor 42 is arranged.
  • the resistors 42 serve to electrically balance the paths 38 so that the ohmic resistance of a path 38, which results from the aggregation of the individual resistances of the components arranged in the path 38, assumes a specific value.
  • the ohmic resistance of a path 38 corresponds to the ohmic resistance of the remaining paths 38.
  • the ohmic resistors 42 are chosen so that a desired individual operating current in the individual paths 38 sets.
  • the resistance values of the resistors 42 are selected such that the same operating current is established in all paths 38.
  • the electrical resistors 42 may also have a temperature-dependent ohmic resistance value and be designed as NTC or PTC resistors. As a result, heating of the semiconductor light sources 22 and an associated change in the resistance of the semiconductor light sources 22 can be compensated for, for example, during operation of the illumination device 10, so that regardless of the current operating temperature, the desired individual current strength always flows through the respective path 38, that is, the current regardless of the operating temperature of the LEDs 22 is kept constant.
  • FIG. 4 shows a circuit arrangement for operating the semiconductor light sources 22 in a third embodiment.
  • each of the switching elements 40 serves in addition to the switching on and off of the corresponding path 38 and the LEDs 22 arranged therein as a switching device for a path-wise pulse width modulation.
  • an individual pulse width modulation can be realized in order to set the operating current per path 38 individually and to be able to divide the total operating current provided by the current source 32 in the desired manner onto the individual paths 38.
  • the duty cycle of the pulse width modulation in each path 38 is set such that the desired current intensity in the path 38 is set over the time average.
  • the pulse width modulation can be controlled or regulated.
  • the current in each path 38 must be detected separately and fed to a path-individual control.
  • a measuring line 44th provided via which the control and / or regulating device 30 determines the respective current in the respective path 38 and supplies the determined current to the control algorithm.
  • the sampling rate for detecting the current current can be selected to be significantly larger (the current value is detected less frequently) than in the prior art.
  • the control and / or regulating device 30 has additional knowledge with regard to the number of active LEDs 22 and the resulting sum operating current resulting therefrom.
  • brightness requirements on the individual semiconductor light sources 22 can be met by the duty cycle of the pulse width modulation in the individual paths 38 being set individually. It is also possible that the duty cycle of the pulse width modulation in the paths 38 superimposed on the duty cycle of the pulse width modulation for setting the total operating current.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP13191936.7A 2012-12-12 2013-11-07 Procédé et dispositif de fonctionnement d'un dispositif d'éclairage d'un véhicule automobile Withdrawn EP2744302A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012222958.2A DE102012222958A1 (de) 2012-12-12 2012-12-12 Verfahren und Vorrichtung zum Betreiben einer Beleuchtungseinrichtung eines Kraftfahrzeugs

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EP2744302A1 true EP2744302A1 (fr) 2014-06-18

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3185649A1 (fr) * 2015-12-23 2017-06-28 SMR Patents S.à.r.l. Circuit de commande pour au moins un dispositif d'éclairage dans un véhicule
WO2020025398A1 (fr) * 2018-08-03 2020-02-06 HELLA GmbH & Co. KGaA Procédé et moyen servant à régler une source de courant pour un réseau de diodes électroluminescentes
EP3917287A1 (fr) * 2020-05-26 2021-12-01 Marelli Automotive Lighting Reutlingen (Germany) GmbH Circuit de commande et procédé de commande de plusieurs agencements led connectés en parallèle les uns aux autres et dispositif d'éclairage pour un véhicule automobile doté d'un tel circuit de commande

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6782539B2 (ja) * 2015-11-24 2020-11-11 スタンレー電気株式会社 発光装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006005521B3 (de) * 2006-02-07 2007-05-16 Lear Corp Schaltung und Verfahren zum Ansteuern eines LED-Array's
DE102008021534A1 (de) 2008-04-30 2009-11-05 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung für ein Kraftfahrzeug und Verfahren zum Betreiben einer Beleuchtungseinrichtung für ein Kraftfahrzeug
DE102010060857A1 (de) * 2010-11-29 2012-05-31 Hella Kgaa Hueck & Co. Steuer- und/oder Regelungsmittel für ein Leuchtdiodenfeld, Schaltungsanordnung mit einem solchen Steuer- und/oder Regelungsmittel und Verfahren zum Betreiben einer solchen Schaltungsanordnung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006005521B3 (de) * 2006-02-07 2007-05-16 Lear Corp Schaltung und Verfahren zum Ansteuern eines LED-Array's
DE102008021534A1 (de) 2008-04-30 2009-11-05 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung für ein Kraftfahrzeug und Verfahren zum Betreiben einer Beleuchtungseinrichtung für ein Kraftfahrzeug
DE102010060857A1 (de) * 2010-11-29 2012-05-31 Hella Kgaa Hueck & Co. Steuer- und/oder Regelungsmittel für ein Leuchtdiodenfeld, Schaltungsanordnung mit einem solchen Steuer- und/oder Regelungsmittel und Verfahren zum Betreiben einer solchen Schaltungsanordnung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3185649A1 (fr) * 2015-12-23 2017-06-28 SMR Patents S.à.r.l. Circuit de commande pour au moins un dispositif d'éclairage dans un véhicule
US10124722B2 (en) 2015-12-23 2018-11-13 Smr Patents S.A.R.L. Control circuit to control at least one lighting device in a vehicle
WO2020025398A1 (fr) * 2018-08-03 2020-02-06 HELLA GmbH & Co. KGaA Procédé et moyen servant à régler une source de courant pour un réseau de diodes électroluminescentes
US11184966B2 (en) 2018-08-03 2021-11-23 HELLA GmbH & Co. KGaA Method and means for setting a current source for a light-emitting diode array
EP3917287A1 (fr) * 2020-05-26 2021-12-01 Marelli Automotive Lighting Reutlingen (Germany) GmbH Circuit de commande et procédé de commande de plusieurs agencements led connectés en parallèle les uns aux autres et dispositif d'éclairage pour un véhicule automobile doté d'un tel circuit de commande

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