EP3138368B1 - Ensemble circuit et procédé de commande de led - Google Patents

Ensemble circuit et procédé de commande de led Download PDF

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Publication number
EP3138368B1
EP3138368B1 EP15721618.5A EP15721618A EP3138368B1 EP 3138368 B1 EP3138368 B1 EP 3138368B1 EP 15721618 A EP15721618 A EP 15721618A EP 3138368 B1 EP3138368 B1 EP 3138368B1
Authority
EP
European Patent Office
Prior art keywords
current
led
led assembly
leds
operating device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP15721618.5A
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German (de)
English (en)
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EP3138368A1 (fr
Inventor
Cristian OLARIU
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.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
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.)
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Application filed by Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Publication of EP3138368A1 publication Critical patent/EP3138368A1/fr
Application granted granted Critical
Publication of EP3138368B1 publication Critical patent/EP3138368B1/fr
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    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • 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
    • 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
    • H05B45/56—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving measures to prevent abnormal temperature of the LEDs

Definitions

  • the present invention relates to an arrangement for operating a plurality of LEDs, which are arranged in LED circuits to be operated with constant current, preferably connected in the context of a number of so-called serial-parallel arrays.
  • the invention further relates to a method for operating LEDs.
  • LEDs are displacing more and more classic light sources in modern lighting technology.
  • a wide variety of LED types are available, which differ in terms of their output and in terms of the color or color temperature of the light emitted.
  • suitable LEDs are used depending on the area of application of a luminaire in which the LEDs are used.
  • Figure 1 thus shows a circuit variant known from the prior art, in which all LEDs are supplied by a common operating device 200.
  • a single LED array 210 in each case consists of a plurality of LED strands 220 connected in parallel, in each of which a plurality of LEDs 225 are in turn connected to one another in series.
  • several such LED arrays 210 can also be connected in series to one another and then again in parallel, the operating device 200 then supplying the overall arrangement with a correspondingly suitable constant current I BALLAST .
  • the in Figure 1 Circuit arrangement shown known from the prior art can be modified in various ways.
  • the number of LEDs used within a single array and the type of LEDs can be changed.
  • the number of LED arrays can be changed and it can be varied how many of these arrays are connected in series and how many LED array strings resulting therefrom are in turn arranged in parallel to one another.
  • the operating device 200 must then provide a suitable current. The same also applies in the event that only a single LED array is supplied with power by the operating device.
  • the required supply current results.
  • the circuit arrangement must therefore be designed in such a way that it is ensured that the operating device actually provides a suitable current for the LEDs.
  • the following procedures for solving this problem are already known from the prior art.
  • the operating device can be parameterized accordingly during manufacture or during commissioning, so that it permanently outputs the suitable current specified at the beginning.
  • this then means that it is not possible to adapt the current to changing conditions during later operation.
  • an adjustment could be necessary, for example, if some of the LED arrays fail and / or defective LED arrays are replaced by new arrays equipped with other LEDs.
  • the resistance can only be assessed with a relatively low accuracy. Further In this case, only a single LED array can then be identified by the operating device, and this must assume that the circuit arrangement has all identical arrays. In particular, however, the operating device does not show how many LED arrays are present in total and how they are interconnected.
  • the WO 2013/186655 A2 shows an LED-based lighting unit in which an LED module is electrically connected to an operating device via connections.
  • the operating device is used to provide a supply current for the LEDs of the LED module, which furthermore has an identification element in the form of a current source in order to provide a suitable supply current for the LEDs.
  • each LED module with a memory element in which information relating to the required supply current is stored digitally.
  • the operating device must then read this memory and adapt the output current based on it.
  • the present invention is therefore based on the object of enabling an operating device which supplies LED circuit arrangements to adapt the output current supplied to the actual requirements of the circuit arrangement in a simple manner.
  • the solution according to the invention is based on the idea of assigning an arrangement of LEDs to an identification element in the form of a so-called current sink. This is connected to the operating device separately from the actual power supply circuit via a parallel so-called feedback circuit, so that the operating device can determine the current flow in the feedback circuit resulting from the current sink. This current flow in turn characterizes the LED arrangement such that the operating device is able to provide a suitable supply current.
  • a circuit arrangement for operating LEDs with at least one - preferably serial-parallel - LED arrangement and an operating device for providing a supply current for the LEDs is proposed, the LED arrangement being assigned an identification element in the form of a current sink, which is connected via a Feedback circuit is connected to the operating device, and wherein the operating device is designed to provide a suitable supply current for the LEDs on the basis of a current flow resulting from the feedback circuit.
  • a protective mechanism is assigned to the LED arrangement, which, in the event of a detected fault condition, bridges the LED arrangement or interrupts a current flow through the LED arrangement, the protective mechanism influencing the associated current sink in the same way.
  • a method for operating at least one - preferably serial-parallel - LED arrangement in which an identification element in the form of a current sink is assigned to the LED arrangement and is connected to an operating device via a feedback circuit, based on a a suitable supply current for the LEDs is made available to the current flow resulting from the feedback circuit.
  • a protective mechanism is assigned to the LED arrangement, which, in the event of a detected fault condition, bridges the LED arrangement or interrupts a current flow through the LED arrangement, the protective mechanism influencing the associated current sink in the same way.
  • each LED arrangement is assigned a corresponding identification element in the form of a current sink, these current sinks then being connected to one another in the context of the feedback circuit.
  • this is separate from the supply circuit, its structure is exactly the same.
  • the current sinks are connected to one another in the same way, depending on the number of LED arrangements connected in series or in parallel.
  • This has the advantage that the overall current flow in the feedback circuit in turn allows a simple conclusion to be drawn about the total supply current required by all LEDs. It is preferably provided that the current sinks result in only a very small current flow in the feedback circuit, which is, however, connected to the actually required current via a known proportionality factor.
  • the solution according to the invention thus allows the total current required to be determined in a simple manner, independently of the interconnection of the LED arrangements, and accordingly to operate the LED arrangement in a suitable manner.
  • the current sinks that is to say the identification elements, not only allow conclusions to be drawn about the required current but also about the required voltage for operating the LEDs.
  • each current sink also causes a fixed voltage drop in the feedback circuit. If this voltage drop caused by the current sink is known to the operating device, it can be determined from the total voltage drop resulting across the entire feedback circuit how many LED arrangements are connected in series with one another.
  • the voltage drop caused by the current sink corresponds to a predetermined integer fraction of the required forward voltage of the LED arrangement. In the event that this gain factor is known to the operating device, it can then in turn provide a suitable supply voltage. However, the number of LED arrangements connected in series cannot be deduced directly here.
  • the protection mechanism makes it possible to take defects of individual LEDs into account in the circuit arrangement. Different variants are known from the prior art for reacting to corresponding LED defects. This is necessary because defective LEDs can lead to a strong imbalance in the distribution of the current within the circuit arrangement, the imbalance then propagating in such a way that further LEDs are damaged. Various protection mechanisms are therefore known which either detect the current flow through the associated LED arrangement or bridge it when appropriate defects are detected.
  • Protection mechanisms of this type then also affect the associated identification current sinks in the same way. This means that if a protective mechanism bridges the associated array or the associated arrangement due to a detected LED defect, this also occurs in the same way for the current sink within the feedback circuit. If, on the other hand, the current flow is interrupted, the associated branch in the feedback circuit is also interrupted. These measures have to As a result, the current in the feedback circuit automatically adjusts to the changed supply current required if protective measures so require. This further optimizes the operation of the LEDs as a whole.
  • FIG. 2 shows a first embodiment of an LED module, generally provided with the reference numeral 10, which is designed in the manner according to the invention.
  • the LED module 10 initially contains a serial-parallel LED array 15, which is formed from a plurality of LED strands 16 connected in parallel with one another. Within each LED strand 16, a plurality of LEDs 17 are connected in series with one another, ideally the number of LEDs 17 in the strands 16 is identical.
  • the LED module 10 has 15 connections LED + and LED at the input and at the output of the LED array, which are used to connect one
  • Enable supply circuit that leads to an operating device for the power supply of the LEDs.
  • the invention is described on the basis of serial-parallel LED arrays which, as mentioned, represent a particularly advantageous circuit variant for operating LEDs.
  • the concept according to the invention can be used in a much more general manner and can also be used in LED arrangements in which the LEDs are connected in a different way.
  • the module 10 requires a certain constant supply current I MODULE and a suitable supply voltage.
  • I MODULE constant supply current
  • the LED module 10 itself enables the operating device to determine the amount of current required.
  • the LED module 10 has an identification element in the form of a so-called current sink 20, which is connected to the operating device via a so-called feedback circuit.
  • the LED module 10 has two further connections FB + and FB-, which are formed separately from the connections for the power supply circuit LED + and LED-. This means that the feedback circuit is fundamentally separate but - as described in more detail below - is implemented in parallel with the power supply circuit.
  • I MODULE denotes the current required by the LED array 15, while I SET denotes the current flow caused by the current sink 20.
  • the proportionality factor F C must therefore be known to the operating device in this case, so that after evaluating the current flow resulting from the feedback circuit it knows what level the current output via the supply circuit must have.
  • the amplification factor F C could be 100, so that at a current level of 3 mA caused by the current sink, the operating device provides a supply current for the LEDs of 300 mA.
  • the concept according to the invention has advantages in particular if the overall arrangement is not just an LED array as in FIG Figure 2 has shown, but consists of several LED arrays, as exemplified in Figure 3 is shown.
  • n ⁇ m LED modules 10, each containing an LED array 15, are connected to one another, this being done in n parallel strands, each of which has m LED modules 10 connected in series.
  • each LED module 10 has the identifying current sink 20, which are now connected to one another in a feedback circuit 25, which likewise leads to the operating device 50 and is here connected to an internal control unit 51.
  • the feedback circuit 25 is designed separately from the power supply circuit 5, but is designed in parallel or in an identical manner with regard to its structure. This means that the individual current sinks 20 of the LED modules 10 are connected to one another in the same way as is the case for the LED arrays 15. This automatically results in a corresponding total current I FEEDBACK in the feedback circuit 25, which in turn corresponds to the total current required by the LED arrangement via the known proportionality factor F C and is then output in a corresponding manner by the operating device 50.
  • the LED arrays 15 of the individual LED modules 10 could even be designed differently. This means that the modules themselves could even require different supply currents, since this effect automatically - if the above relationship applies, according to which the current flow caused by the current sink represents a predetermined fraction of the required current - affects that in the feedback circuit resulting current flow affects. Ideally, however, the modules are designed to be as similar as possible or even identical, since this generally results in advantages with regard to uniform light emission.
  • the previous considerations relate to the amount of current that is provided by the operating device 50 for the LED modules 10.
  • the concept can also be used to adapt the voltage output by the operating device in a corresponding manner or to identify the number of LED modules 10 connected in series.
  • the current sink 20 has a specific voltage drop V SINK (see Fig. 2 ) causes that is fixed and known to the operating device 50. From the resulting voltage drop V FEEDBACK via the feedback circuit, the information can then be derived as to how much - in the exemplary embodiment shown by Figure 3 So m - LED modules 10 are connected in series.
  • V SINK f V ⁇ V LED
  • the operating device 50 can automatically determine the total voltage required for the LED arrangement, but can no longer determine how many modules are connected in series. In this case, the proportionality factor f V must of course be known to the operating device 50.
  • the minimum required voltage V SINK of the current sink can be kept very low, in particular less than 1 volt. Combined with a high amplification factor F C and thus a low current flow, which is caused by the current sink, the result is that the power loss, which is caused by the measures according to the invention, is extremely small. At the same time, however, as described above, significant advantages are achieved with regard to the automatic adjustment with regard to the supply current.
  • FIG. 4 shows a first protective mechanism 30 which has a switching element 31 which interrupts the current flow through the entire array 15 in certain situations. This can be the case, for example, if an excessively high current flow results due to individual defective LEDs, which possibly leads to a further one Damage to all LEDs can result.
  • protective mechanisms are already known from the prior art.
  • the interruption of the current flow through the array 15 naturally also affects the amount of current required by the LED arrangement.
  • the current sink 20 of the LED module 10 is treated in the same way by the protective mechanism 30.
  • a switch 32 is also assigned to the current sink 20 in the feedback circuit, which switch is controlled in an identical manner by the protective mechanism 30. If the current flow through the LED array 15 is interrupted, this also applies in the same way to the branch with the current sink 20.
  • FIG. 5 shows an alternative protection mechanism 40 which, in the event of the detection of a problem with the aid of a switch 41, short-circuits or bridges the LED array 15.
  • the current sink 20 is treated identically.
  • the feedback circuit now has a switch 42 parallel to the current sink 20, which is controlled by the protective mechanism 40 in the same way as the switch 41.
  • the interruption or bridging of an LED module is also automatically taken into account in the feedback circuit and the output of the supply current can be adapted accordingly by the operating device. This results in an even better adaptation of the power supply for the LEDs.
  • FIG. 7 An alternative possibility for designing a current sink is in Figure 7 shown. Again, this is based on the implementation or connection of two transistors Q 1 and Q 2 and two resistors R 1 and R 2 , but now using additional components, in particular the further transistors Q 3 and Q 4 and the resistor R 3, the current sink in you are able to independently create a corresponding preload. In this case, the current sink must actually only be connected to the connections of the feedback circuit FB + and FB, and a coupling to the power supply circuit for the LEDs is not necessary. In this case, however, a higher voltage V SINK is required, which can optionally be obtained again using the Zener diode D Z.
  • a temperature-dependent resistor R TH which is part of a corresponding resistor network with the resistors R BASE , R P and R S, is used here to compensate for thermal fluctuations in the base-emitter voltage. This ensures that the supply current remains constant even at higher temperatures.
  • the present invention has the advantage that, for the power supply of more complex LED circuits, the corresponding operating device is able to automatically adapt the supply current to the corresponding needs of the circuit. Not only are failures or bridging of individual LED arrangements due to defects automatically taken into account, but also the replacement or replacement of an LED module with a new one that places different demands on the supply current is automatically taken into account.

Landscapes

  • Led Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Claims (13)

  1. Disposition de circuit avec au moins une disposition de LED (15) ainsi qu'un appareil de commande (50) pour la mise à disposition d'un courant d'alimentation (IBALLAST) pour les LED (17) de la disposition de LED (15),
    dans laquelle à la disposition de LED (15) correspond un élément d'identification sous la forme d'un récepteur de courant (20), qui est relié par l'intermédiaire d'un circuit de retour parallèle (25) avec l'appareil de commande (50),
    dans laquelle l'appareil de commande (50) est conçu pour mettre à disposition un courant d'alimentation adapté pour les LED (17) sur la base d'un flux de courant (IFEEDBACK) généré par le circuit de retour (25),
    et caractérisé en ce que
    à la disposition de LED (15) correspond un mécanisme de protection (30, 40) qui, dans le cas d'un état d'erreur détecté, court-circuite la disposition de LED (15) ou interrompt un flux de courant à travers la disposition de LED (15), dans lequel le mécanisme de protection exerce de la même manière une influence sur le récepteur de courant (20) correspondant.
  2. Disposition de circuit selon la revendication 1,
    caractérisée en ce que
    celle-ci comprend plusieurs dispositifs à LED (15) qui sont reliés avec l'appareil de commande (50) par l'intermédiaire d'un circuit à courant d'alimentation (5), dans lequel, à chaque disposition de LED (15), correspond un récepteur de courant (20) et la structure du circuit de retour (5) est identique à celle du circuit à courant d'alimentation (25).
  3. Disposition de circuit selon la revendication 1 ou 2,
    caractérisée en ce que
    un flux de courant provoqué à travers le récepteur de courant (20) est proportionnel au courant requis par la disposition de LED (15) correspondant.
  4. Disposition de circuit selon l'une des revendications précédentes,
    caractérisée en ce que
    l'appareil de commande (50) est en outre conçu pour générer, en fonction d'une chute de tension dans le circuit de retour (5), une tension d'alimentation pour les LED.
  5. Disposition de circuit selon la revendication 4,
    caractérisée en ce que
    le récepteur de courant (20) provoque une chute de tension (VSINK) prédéterminée ou une chute de tension (VSINK) provoquée par le récepteur de courant (20) est proportionnelle à la tension directe requise par la disposition de LED (15) correspondant.
  6. Disposition de circuit selon l'une des revendications précédentes,
    caractérisée en ce que
    les LED de la disposition de LED (15) resp. des dispositifs à LED (15) sont disposées sous la forme d'une matrice série-parallèle.
  7. Module à LED (10) avec une disposition de LED (15) ainsi que des raccords (LED+, LED-) pour le raccordement du module avec un appareil de commande (50) pour la mise à disposition d'un courant d'alimentation (IBALLAST) pour les LED (17) de la disposition de LED (15),
    dans lequel le module à LED comprend en outre un élément d'identification sous la forme d'un récepteur de courant (20), qui peut être relié, par l'intermédiaire de raccords supplémentaires, avec l'appareil de commande (50), afin de permettre à celui-ci de mettre à disposition un courant d'alimentation adapté pour les LED (17)
    et caractérisé en ce que
    à la disposition de LED (15) correspond un mécanisme de protection (30, 40) qui, dans le cas d'un état d'erreur détecté, court-circuite la disposition de LED (15) ou interrompt un flux de courant à travers la disposition de LED (15), dans lequel le mécanisme de protection exerce de la même manière une influence sur le récepteur de courant (20) correspondant.
  8. Procédé de commande d'au moins une disposition de LED (15) ainsi que d'un appareil de commande (50) pour la mise à disposition d'un courant d'alimentation (IBALLAST) pour les LED (17) de la disposition de LED (15),
    dans lequel, à la disposition de LED (15) correspond un élément d'identification sous la forme d'un récepteur de courant (20), qui est relié par l'intermédiaire d'un circuit de retour parallèle (25), avec l'appareil de commande (50) et, sur la base d'un flux de courant (IFEEDBACK) généré par le circuit de retour (25), un courant d'alimentation adapté pour les LED (17) est mis à disposition,
    et caractérisé en ce que
    à la disposition de LED (15) correspond un mécanisme de protection (30, 40) qui, dans le cas d'un état d'erreur détecté, court-circuite la disposition de LED (15) ou interrompt un flux de courant à travers la disposition de LED (15), dans lequel le mécanisme de protection exerce de la même manière une influence sur le récepteur de courant (20) correspondant.
  9. Procédé selon la revendication 8,
    caractérisé en ce que
    la disposition comprend plusieurs dispositions de LED (15) individuelles qui sont reliées par l'intermédiaire d'un circuit à courant d'alimentation (5) avec l'appareil de commande (50), dans lequel, à chaque disposition de LED (15), correspond un récepteur de courant (20) et la structure du circuit de retour (5) est identique à celle du circuit à courant d'alimentation (25).
  10. Procédé selon la revendication 8 ou 9,
    caractérisé en ce que
    un flux de courant provoqué à travers le récepteur de courant (20) est proportionnel au courant requis par la disposition de LED (15) correspondante.
  11. Procédé selon l'une des revendications 8 à 10,
    caractérisé en ce que
    une tension d'alimentation est générée pour les LED en fonction d'une chaute de tension dans le circuit de retour (5).
  12. Procédé selon la revendication 11,
    caractérisé en ce que
    le récepteur de courant (20) provoque une chute de tension (VSINK) prédéterminée ou
    une chute de tension (VSINK) provoquée à travers le récepteur de courant (20) est proportionnelle à la tension directe requise par la disposition de LED (15) correspondante.
  13. Procédé selon l'une des revendications 8 à 12,
    caractérisé en ce que
    les LED de la disposition de LED (15) resp. des dispositions de LED (15) sont disposées sous la forme d'une matrice série-parallèle.
EP15721618.5A 2014-04-30 2015-04-28 Ensemble circuit et procédé de commande de led Active EP3138368B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014208190.4A DE102014208190A1 (de) 2014-04-30 2014-04-30 Schaltungsanordnung und Verfahren zum Betreiben von LEDs
PCT/EP2015/059197 WO2015165898A1 (fr) 2014-04-30 2015-04-28 Ensemble circuit et procédé de commande de led

Publications (2)

Publication Number Publication Date
EP3138368A1 EP3138368A1 (fr) 2017-03-08
EP3138368B1 true EP3138368B1 (fr) 2020-06-10

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Application Number Title Priority Date Filing Date
EP15721618.5A Active EP3138368B1 (fr) 2014-04-30 2015-04-28 Ensemble circuit et procédé de commande de led

Country Status (4)

Country Link
EP (1) EP3138368B1 (fr)
AT (1) AT15510U1 (fr)
DE (1) DE102014208190A1 (fr)
WO (1) WO2015165898A1 (fr)

Citations (1)

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Publication number Priority date Publication date Assignee Title
WO2010091619A1 (fr) * 2009-02-10 2010-08-19 Wong Wah Nam Procédé d'identification automatique du courant dans des led d'éclairage

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US7301447B2 (en) * 2005-04-13 2007-11-27 Gm Global Technology Operations, Inc. LED turn signal and error detecting method
ATE530383T1 (de) * 2008-07-22 2011-11-15 Iveco Magirus Schaltung zur prüfung des vorhandenseins eines an eine zugmaschine angekoppelten anhängers mittels prüfung des elektrischen stromflusses in den rückwärtigen led-leuchten des anhängers
KR20100002533U (ko) * 2008-08-29 2010-03-10 박영범 자동차 엘이디 램프 전원 제어 장치
DE202010003913U1 (de) * 2010-03-20 2010-07-15 Schott Ag LED-Lichtquellenanordnung
US9041294B2 (en) * 2010-09-27 2015-05-26 Semiconductor Components Industries, Llc Semiconductor component and method
DE102011087658A1 (de) * 2011-12-02 2013-06-06 Osram Gmbh Parallel geschaltete Leuchtketten
US9480108B2 (en) * 2012-04-18 2016-10-25 Axlen, Inc. Solid-state light source
US9215768B2 (en) * 2012-06-14 2015-12-15 Koninklijke Philips N.V. Self-adjusting lighting driver for driving lighting sources and lighting unit including self-adjusting lighting driver
DE102012224349A1 (de) * 2012-06-25 2014-01-02 Osram Gmbh Beleuchtungsanlage mit einer Schnittstelle aufweisend ein Netzgerät und mindestens ein Lichtquellenmodul

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010091619A1 (fr) * 2009-02-10 2010-08-19 Wong Wah Nam Procédé d'identification automatique du courant dans des led d'éclairage

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DE102014208190A1 (de) 2015-11-05
AT15510U1 (de) 2017-11-15
WO2015165898A1 (fr) 2015-11-05
EP3138368A1 (fr) 2017-03-08

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