EP1379108A1 - LED supply and identification unit - Google Patents

LED supply and identification unit Download PDF

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Publication number
EP1379108A1
EP1379108A1 EP03014744A EP03014744A EP1379108A1 EP 1379108 A1 EP1379108 A1 EP 1379108A1 EP 03014744 A EP03014744 A EP 03014744A EP 03014744 A EP03014744 A EP 03014744A EP 1379108 A1 EP1379108 A1 EP 1379108A1
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EP
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Prior art keywords
unit
supply
led
led unit
identity
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EP03014744A
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German (de)
French (fr)
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EP1379108B1 (en
Inventor
Gotthard Dr. Schleicher
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Osram GmbH
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Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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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
    • H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules

Definitions

  • the invention relates to a supply unit for LED units and a method for recognizing the identity of LED units, in particular for recognizing of parameters necessary for the power supply of the LED unit, and a corresponding LED unit.
  • supply units work of LED units with different loads.
  • the term LED light emitting device
  • OLEDs organic light emitting device.
  • supply units only supply an output voltage to supply power to a connected LED unit. Should several or different LED units supply power experience the supply unit, so the supply unit for the power supply be designed by several or different LED units and the information required for the power supply about nominal parameters of the power supply Get LED units.
  • the object of the present invention is therefore a supply unit LED unit and a method of recognizing LED units that create with regard to the supply of various LED units by one supply unit is improved.
  • a supply unit for at least an LED unit has a detection unit, which are designed to recognize the identity of the LED unit via electrical quantities is, as well as supply connections for the power supply of the LED unit the supply unit.
  • the identity is recognized the LED unit via the supply connections.
  • the supply connections can serve the power supply, at the same time be used to connect the identity Recognize LED units and determine which ones, for example Power supply for the LEDs is necessary. This makes the supply unit more compact and be kept simple, so that the required installation effort is significantly reduced.
  • control unit in the supply unit included based on the recognized identity of the LED unit controls the power supply of the LED unit.
  • This enables evaluate the recognized identity of the connected LED units and accordingly control, so that the supply unit automatically always the right one Provides power supply when, for example, a new or additional one LED unit with possibly different nominal load connected to the supply unit becomes.
  • the control unit can also supply power prevent and feedback on the status of the connected Output the LED unit if it is defective, for example, or with the supply unit is not compatible.
  • the detection and the power supply take place preferably exclusively via two supply connections.
  • the LED unit has the following steps: providing a first electrical variable for the LED unit to be recognized, recognizing the identity of the LED unit based on one provided by the LED unit in response to the first electrical quantity second electrical quantity. Identity is recognized via supply connections for the power supply of the LED unit.
  • the method further comprises controlling the Power supply to the LED unit based on the recognized identity of the LED unit. This means that not only the identity of a connected LED unit can be recognized, but the information about the identified identity can processed and the power supply controlled accordingly.
  • the method can additionally be carried out repeatedly when the LED unit is in operation become.
  • the necessary power supply checked and adjusted if necessary.
  • the LED unit is recognized and supplied with power exclusively via two supply connections.
  • a voltage which is small in relation to the power supply is preferably applied as the first electrical variable, and the LED unit is recognized as a second electrical variable by an impedance of an identification unit.
  • the impedance of the identification unit is small compared to the LED impedance effective when the small voltage is applied. The consequence of this is that the supply unit essentially only " sees” the identification unit from the LED unit and only evaluates the second electrical variable provided by the identification unit, without the influence of downstream LEDs significantly influencing the returned second electrical variable.
  • the impedance can be an ohmic resistance.
  • active components are also possible that generate an electrical quantity by themselves. Digital components can also be used for the purpose mentioned.
  • the identification unit is preferably a component which is separate from the LEDs and which can be connected upstream of the LEDs in the LED unit, for example.
  • the LED unit according to the invention for connection to the above-mentioned supply unit has at least one LED, supply connections for power supply the supply unit, and an identification unit with the detection the technical properties of the identity of the LED unit.
  • the identification unit can be identified via the supply connections.
  • the detection and power supply can preferably be carried out exclusively via two supply connections are made via which the LED unit with the supply unit is connected.
  • the identification unit can be switched off. This is an advantage as it is used in the actual power supply is not required and thus unnecessary power consumption is avoided.
  • the impedance of the identification unit is preferred compared to the one in relation to the power supply applied to the LED unit small voltage effective led impedance small.
  • the figure shows a system consisting of a supply unit 1 and an LED unit 2, which are connected to one another via the supply lines 4a, 4b.
  • optional 2 additional connections 8 can be connected to the LED unit for connecting further LED units 2 are provided, which are then also provided by the supply unit 1 can receive the required power supply.
  • the supply unit 1 contains a recognition unit 7, by means of which the supply unit 1 can recognize information about the connected LED units 2, for example the supply voltage or the like required for the power supply by the supply unit 1 for operating the LED unit 2.
  • an identification unit 3 is provided in the LED unit 2 according to the invention in addition to the LEDs 9.
  • the identification unit 3 returns information about the identity of the corresponding LED unit 2 to the recognition unit 7 in the supply unit 1. This is done in that the detection unit 7 first outputs an electrical quantity (generally a small voltage compared to the supply voltage for the connected LEDs) to the LED unit 2 via the supply lines 4a, 4b (position A of the switch 13).
  • the identification unit 3 can only consist of an impedance, an ohmic resistance, which is characteristic of the LED unit.
  • This impedance is preferably small compared to the effective impedance of the LEDs 9 at a low voltage, so that, for example, when a voltage is applied, a current only flows through the identification unit 3 and the detection unit 7 therefore does not “ see” the LEDs 9 and thus exclusively receives feedback from the Identification unit 3 to the recognition unit 7.
  • the detection unit 7 detects a small voltage in the supply unit 1 applied to the LED unit 2 (switch position A), then flows in Current through the identification unit 3, in particular the resistor 11, via the Connections 4a, 4b back to the detection unit 7 and is measured there, and the Resistance 11 in the identification unit 3 can be determined in this way.
  • the identification unit can also resist other electrical or electronic ones Contain (also active) components that are suitable for a for the identification unit 3 of the corresponding LED unit 2 characteristic signal in Responding to one of the recognition unit 7 via the supply connections 4a, 4b output electrical quantity provided.
  • the recognition unit 7 can now be the one for the connected one LED unit 2 required power supply (supply voltage) determine.
  • the information about the power supply can be supplied via an optional control unit 6 subsequent to one provided in the supply unit 1
  • Output unit 5 are forwarded, for example, the necessary supply voltage generated and output for the LED unit (s) 2.
  • the control unit switches 6 in the switch state B, and that generated by the output unit 5 Power is supplied to the LED unit (s) 2 via the supply connections 4a, 4b.
  • the identification unit 3 also represents a power consumer, it can optionally switched off via a switch 12 triggered by a control element 10 when the power supply begins. For example happen that the control element 10 one of the supply unit 1 recognized supply voltage and then detects the switch 12 in the open state switches so that a supply current only through the LEDs 9 flows.
  • switch position A While the power supply is in the detection mode (switch position A) are switched over, for example to check whether an LED unit 2 is defective or has been replaced. As a result, the supply parameters during the Operation redefined and in output mode (switch position 2) accordingly be adjusted.
  • the structure according to the invention can both supply the LED units 2 as well as identity recognition, d. H. the supply parameters, of the LED units 2 take place exclusively via the supply connections 4a and 4b. Additional lines or connections are not necessary, so use complicated and complex circuits for LED supply is avoided.

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  • Control Of El Displays (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Led Devices (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Burglar Alarm Systems (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The unit (1) indicates 2the identification of an LED devices (2) via an identification stage (7) and provides a corresponding operating power for the latter under control of a control stage (6), connected to a power output stage (5). The identification stage delivers an electrical parameter to the LED device and provides its identity from the characteristic impedance or resistance of an identification circuit (3), with a single pair of terminals (4a,4b) used for identification of the LED device and delivery of the operating power. Also included are Independent claims for the following: (a) a method for identification of an LED device; (b) a LED device for connection to a supply and identification unit; (c) a system with a supply and identification unit and an LED device

Description

Die Erfindung betrifft eine Versorgungseinheit für LED-Einheiten, sowie ein Verfahren zum Erkennen der Identität von LED-Einheiten, insbesondere zum Erkennen von für die Leistungsversorgung der LED-Einheit notwendigen Parametern, sowie eine entsprechende LED-Einheit.The invention relates to a supply unit for LED units and a method for recognizing the identity of LED units, in particular for recognizing of parameters necessary for the power supply of the LED unit, and a corresponding LED unit.

Im Gegensatz zu konventionellen elektrischen Vorschaltgeräten arbeiten Versorgungseinheiten von LED-Einheiten mit unterschiedlichen Lasten. Der Begriff LED (light emitting device) umfasst im folgenden auch sogenannte OLEDs (organic light emitting device). In der Regel liefern solche Versorgungseinheiten nur eine Ausgangsspannung zur Leistungsversorgung einer angeschlossenen LED-Einheit. Sollen mehrere oder unterschiedliche LED-Einheiten eine Leistungsversorgung durch die Versorgungseinheit erfahren, so muss die Versorgungseinheit für die Leistungsversorgung von mehreren oder unterschiedlichen LED-Einheiten ausgelegt sein und die zur Leistungsversorgung nötigen Informationen über Nennparameter der zu versorgenden LED-Einheiten erhalten.In contrast to conventional electrical ballasts, supply units work of LED units with different loads. The term LED (light emitting device) also includes OLEDs (organic light emitting device). As a rule, such supply units only supply an output voltage to supply power to a connected LED unit. Should several or different LED units supply power experience the supply unit, so the supply unit for the power supply be designed by several or different LED units and the information required for the power supply about nominal parameters of the power supply Get LED units.

Aufgabe der vorliegenden Erfindung ist es daher, eine Versorgungseinheit, eine LED-Einheit und ein Verfahren zum Erkennen von LED-Einheiten zu schaffen, die im Hinblick auf die Versorgung verschiedener LED-Einheiten durch eine Versorgungseinheit verbessert wird.The object of the present invention is therefore a supply unit LED unit and a method of recognizing LED units that create with regard to the supply of various LED units by one supply unit is improved.

Erfindungsgemäß wird diese Aufgabe gelöst durch eine Versorgungseinheit für wenigstens eine LED-Einheit. Die Versorgungseinheit weist eine Erkennungseinheit, die zum Erkennen der Identität der LED-Einheit über elektrische Größen ausgelegt ist, sowie Versorgungsanschlüsse zur Leistungsversorgung der LED-Einheit durch die Versorgungseinheit auf. Erfindungsgemäß erfolgt die Erkennung der Identität der LED-Einheit über die Versorgungsanschlüsse. Bei Versorgungseinheiten nach dem Stand der Technik sind neben den Versorgungsleitungen zur Leistungsversorgung der LEDs weitere Leitungen nötig, um Informationen über die Identität der LEDs zu erhalten. Dies führt in der Praxis zu einem erheblichen Installationsaufwand. Mit dem erfindungsgemäßen Aufbau können die Versorgungsanschlüsse, die der Leistungsversorgung dienen, gleichzeitig genutzt werden, um die Identität angeschlossener LED-Einheiten zu erkennen und beispielsweise zu ermitteln, welche Leistungsversorgung für die LEDs nötig ist. So kann die Versorgungseinheit kompakter und einfacher gehalten werden, so dass der erforderliche Installationsaufwand deutlich reduziert wird.According to the invention, this object is achieved by a supply unit for at least an LED unit. The supply unit has a detection unit, which are designed to recognize the identity of the LED unit via electrical quantities is, as well as supply connections for the power supply of the LED unit the supply unit. According to the invention, the identity is recognized the LED unit via the supply connections. For supply units after the state of the art are in addition to the supply lines for power supply The LEDs require additional lines to provide information about the identity of the Get LEDs. In practice, this leads to a considerable installation effort. With the structure according to the invention, the supply connections can serve the power supply, at the same time be used to connect the identity Recognize LED units and determine which ones, for example Power supply for the LEDs is necessary. This makes the supply unit more compact and be kept simple, so that the required installation effort is significantly reduced.

Nach einer vorteilhaften Ausführungsform ist weiter eine Steuereinheit in der Versorgungseinheit enthalten, die auf der Grundlage der erkannten Identität der LED-Einheit die Leistungsversorgung der LED-Einheit steuert. Hiermit wird es ermöglicht, die erkannte Identität der angeschlossenen LED-Einheiten auszuwerten und entsprechend zu steuern, so dass die Versorgungseinheit automatisch immer die richtige Leistungsversorgung bereitstellt, wenn zum Beispiel eine neue oder zusätzliche LED-Einheit mit gegebenenfalls anderer Nennlast an die Versorgungseinheit angeschlossen wird. Gegebenenfalls kann die Steuereinheit auch die Leistungsversorgung unterbinden und eine Rückmeldung über den Zustand der angeschlossenen LED-Einheit ausgeben, wenn diese zum Beispiel defekt oder mit der Versorgungseinheit nicht kompatibel ist. Die Erkennung und die Leistungsversorgung erfolgen vorzugsweise ausschließlich über zwei Versorgungsanschlüsse.According to an advantageous embodiment, there is also a control unit in the supply unit included based on the recognized identity of the LED unit controls the power supply of the LED unit. This enables evaluate the recognized identity of the connected LED units and accordingly control, so that the supply unit automatically always the right one Provides power supply when, for example, a new or additional one LED unit with possibly different nominal load connected to the supply unit becomes. If necessary, the control unit can also supply power prevent and feedback on the status of the connected Output the LED unit if it is defective, for example, or with the supply unit is not compatible. The detection and the power supply take place preferably exclusively via two supply connections.

Das erfindungsgemäße Verfahren zur Erkennung der Identität wenigstens einer LED-Einheit weist folgende Schritte auf: Bereitstellen einer ersten elektrischen Größe für die zu erkennende LED-Einheit, Erkennen der Identität der LED-Einheit anhand einer von der LED-Einheit im Ansprechen auf die erste elektrische Größe bereitgestellten zweiten elektrischen Größe. Das Erkennen der Identität erfolgt über zur Leistungsversorgung der LED-Einheit dienende Versorgungsanschlüsse.The method according to the invention for recognizing the identity of at least one The LED unit has the following steps: providing a first electrical variable for the LED unit to be recognized, recognizing the identity of the LED unit based on one provided by the LED unit in response to the first electrical quantity second electrical quantity. Identity is recognized via supply connections for the power supply of the LED unit.

Nach einer vorteilhaften Variante umfasst das Verfahren weiter die Steuerung der Leistungsversorgung der LED-Einheit auf der Grundlage der erkannten Identität der LED-Einheit. Hierdurch kann nicht nur die Identität einer angeschlossenen LED-Einheit erkannt werden, sondern die Informationen über die erkannte Identität kann verarbeitet und die Leistungsversorgung entsprechend gesteuert werden. According to an advantageous variant, the method further comprises controlling the Power supply to the LED unit based on the recognized identity of the LED unit. This means that not only the identity of a connected LED unit can be recognized, but the information about the identified identity can processed and the power supply controlled accordingly.

Das Verfahren kann ergänzend beim Betrieb der LED-Einheit wiederholt ausgeführt werden. Hierdurch kann bei Wechsel der LED-Einheit während des Betriebs, die nötige Leistungsversorgung überprüft und gegebenenfalls angepasst werden. Vorzugsweise erfolgen das Erkennen und die Leistungsversorgung der LED-Einheit ausschließlich über zwei Versorgungsanschlüsse.The method can additionally be carried out repeatedly when the LED unit is in operation become. As a result, when changing the LED unit during operation, the necessary power supply checked and adjusted if necessary. Preferably the LED unit is recognized and supplied with power exclusively via two supply connections.

Zum Erkennen der Identität der wenigstens einen LED-Einheit wird bevorzugt als erste elektrische Größe eine im Verhältnis zur Leistungsversorgung kleine Spannung angelegt, und die LED-Einheit wird durch eine Impedanz einer Identifikationseinheit als zweite elektrische Größe erkannt. Dabei ist die Impedanz der Identifikationseinheit gegenüber der bei der angelegten kleinen Spannung wirksamen LED-Impedanz klein. Dies hat zur Folge, dass die Versorgungseinheit von der LED-Einheit im wesentlichen nur die Identifikationseinheit "sieht" und nur die von der Identifikationseinheit bereitgestellte zweite elektrische Größe auswertet, ohne dass ein Einfluss nachgeschalteter LEDs die zurückgegebene zweite elektrische Größe deutlich beeinflusst. Bei der Impedanz kann es sich im einfachsten Fall um einen ohmschen Widerstand handeln. Es sind aber auch aktive Bauelemente möglich, die von sich aus eine elektrische Größe erzeugen. Ebenso können zu dem genannten Zweck digitale Bauelemente dienen. Vorzugsweise handelt es sich bei der Identifikationseinheit ein von den LEDs getrenntes Bauteil, das den LEDs in der LED-Einheit beispielsweise vorgeschaltet sein kann.To identify the identity of the at least one LED unit, a voltage which is small in relation to the power supply is preferably applied as the first electrical variable, and the LED unit is recognized as a second electrical variable by an impedance of an identification unit. The impedance of the identification unit is small compared to the LED impedance effective when the small voltage is applied. The consequence of this is that the supply unit essentially only " sees" the identification unit from the LED unit and only evaluates the second electrical variable provided by the identification unit, without the influence of downstream LEDs significantly influencing the returned second electrical variable. In the simplest case, the impedance can be an ohmic resistance. However, active components are also possible that generate an electrical quantity by themselves. Digital components can also be used for the purpose mentioned. The identification unit is preferably a component which is separate from the LEDs and which can be connected upstream of the LEDs in the LED unit, for example.

Die erfindungsgemäße LED-Einheit zum Anschließen an die oben erwähnte Versorgungseinheit weist wenigstens eine LED, Versorgungsanschlüsse zur Leistungsversorgung der Versorgungseinheit, und eine Identifikationseinheit mit bei der Erkennung der Identität der LED-Einheit erfassbaren technischen Eigenschaften auf. Hierbei ist die Identifikationseinheit über die Versorgungsanschlüsse identifizierbar.The LED unit according to the invention for connection to the above-mentioned supply unit has at least one LED, supply connections for power supply the supply unit, and an identification unit with the detection the technical properties of the identity of the LED unit. Here, the identification unit can be identified via the supply connections.

Vorzugsweise kann die Erkennung und Leistungsversorgung ausschließlich über zwei Versorgungsanschlüsse erfolgen, über welche die LED-Einheit mit der Versorgungseinheit verbunden wird.The detection and power supply can preferably be carried out exclusively via two supply connections are made via which the LED unit with the supply unit is connected.

Die Identifikationseinheit kann abschaltbar sein. Dies ist von Vorteil, da sie bei der eigentlichen Leistungsversorgung nicht benötigt und damit ein unnötiger Leistungsverbrauch vermieden wird. Die Impedanz der Identifikationseinheit ist vorzugsweise gegenüber der bei einer an die LED-Einheit angelegten im Verhältnis zur Leistungsversorgung kleinen Spannung wirksamen LED-Impedanz klein.The identification unit can be switched off. This is an advantage as it is used in the actual power supply is not required and thus unnecessary power consumption is avoided. The impedance of the identification unit is preferred compared to the one in relation to the power supply applied to the LED unit small voltage effective led impedance small.

Voranstehend wurde im Zusammenhang mit der Leistungsversorgung und der elektrischen Größen von der Regelung der Spannung gesprochen. Natürlich ist hier auch die Regelung des Ausgangsstroms der Versorgungseinheit möglich.The foregoing has been in connection with the power supply and the electrical Quantities spoken of the regulation of the voltage. Of course, here too the regulation of the output current of the supply unit is possible.

Die Erfindung wird nachfolgend anhand der Figur, die eine Ausführungsform der Erfindung als Schaltbild zeigt, näher erläutert.The invention is explained below with reference to the figure, which is an embodiment of the Invention as a circuit diagram shows, explained in more detail.

Die Figur zeigt ein System aus einer Versorgungseinheit 1 und einer LED-Einheit 2, welche über die Versorgungsleitungen 4a, 4b miteinander verbunden sind. Optional können an der LED-Einheit 2 weitere Anschlüsse 8 zum Anschließen weiterer LED-Einheiten 2 vorgesehen werden, die dann ebenfalls durch die Versorgungseinheit 1 die erforderliche Leistungsversorgung erhalten können.The figure shows a system consisting of a supply unit 1 and an LED unit 2, which are connected to one another via the supply lines 4a, 4b. optional 2 additional connections 8 can be connected to the LED unit for connecting further LED units 2 are provided, which are then also provided by the supply unit 1 can receive the required power supply.

Die Versorgungseinheit 1 enthält eine Erkennungseinheit 7, über die die Versorgungseinheit 1 Informationen über die angeschlossenen LED-Einheiten 2 erkennen kann, beispielsweise die für die Leistungsversorgung durch die Versorgungseinheit 1 zum Betrieb der LED-Einheit 2 erforderliche Versorgungsspannung oder dergleichen. Zur Bereitstellung solcher Informationen ist in der erfindungsgemäßen LED-Einheit 2 neben den LEDs 9 eine Identifikationseinheit 3 vorgesehen. Die Identifikationseinheit 3 liefert Informationen über die Identität der entsprechenden LED-Einheit 2 an die Erkennungseinheit 7 in der Versorgungseinheit 1 zurück. Dies geschieht dadurch, dass die Erkennungseinheit 7 zunächst über die Versorgungsleitungen 4a, 4b eine elektrische Größe (in der Regel eine gegenüber der Versorgungsspannung für die angeschlossenen LEDs kleine Spannung) an die LED-Einheit 2 ausgibt (Stellung A des Schalters 13). Im Falle eines Spannungssignals kann die Identifikationseinheit 3 lediglich aus einer für die LED-Einheit charakteristischen Impedanz, einem ohmschen Widerstand, bestehen. Diese Impedanz ist vorzugsweise klein gegenüber der bei einer kleinen Spannung effektiven Impedanz der LEDs 9, so dass etwa bei einer angelegten Spannung ein Strom lediglich durch die Identifikationseinheit 3 fließt und die Erkennungseinheit 7 die LEDs 9 daher nicht "sieht" und somit ausschließlich eine Rückmeldung der Identifikationseinheit 3 an die Erkennungseinheit 7 erfolgt. The supply unit 1 contains a recognition unit 7, by means of which the supply unit 1 can recognize information about the connected LED units 2, for example the supply voltage or the like required for the power supply by the supply unit 1 for operating the LED unit 2. To provide such information, an identification unit 3 is provided in the LED unit 2 according to the invention in addition to the LEDs 9. The identification unit 3 returns information about the identity of the corresponding LED unit 2 to the recognition unit 7 in the supply unit 1. This is done in that the detection unit 7 first outputs an electrical quantity (generally a small voltage compared to the supply voltage for the connected LEDs) to the LED unit 2 via the supply lines 4a, 4b (position A of the switch 13). In the case of a voltage signal, the identification unit 3 can only consist of an impedance, an ohmic resistance, which is characteristic of the LED unit. This impedance is preferably small compared to the effective impedance of the LEDs 9 at a low voltage, so that, for example, when a voltage is applied, a current only flows through the identification unit 3 and the detection unit 7 therefore does not “ see” the LEDs 9 and thus exclusively receives feedback from the Identification unit 3 to the recognition unit 7.

Wird zum Beispiel eine kleine Spannung durch die Erkennungseinheit 7 in der Versorgungseinheit 1 an die LED-Einheit 2 angelegt (Schalterstellung A), so fließt ein Strom durch die Identifikationseinheit 3, insbesondere den Widerstand 11, über die Anschlüsse 4a, 4b zurück zur Erkennungseinheit 7 und wird dort gemessen, und der Widerstand 11 in der Identifikationseinheit 3 kann so ermittelt werden. Anstelle eines Widerstandes kann die Identifikationseinheit auch andere elektrische oder elektronische (auch aktive) Bauelemente enthalten, die geeignet sind, um ein für die Identifikationseinheit 3 der entsprechenden LED-Einheit 2 charakteristisches Signal im Ansprechen auf eine von der Erkennungseinheit 7 über die Versorgungsanschlüsse 4a, 4b bereitgestellte elektrische Größe auszugeben.For example, if the detection unit 7 detects a small voltage in the supply unit 1 applied to the LED unit 2 (switch position A), then flows in Current through the identification unit 3, in particular the resistor 11, via the Connections 4a, 4b back to the detection unit 7 and is measured there, and the Resistance 11 in the identification unit 3 can be determined in this way. Instead of one The identification unit can also resist other electrical or electronic ones Contain (also active) components that are suitable for a for the identification unit 3 of the corresponding LED unit 2 characteristic signal in Responding to one of the recognition unit 7 via the supply connections 4a, 4b output electrical quantity provided.

Abhängig von der elektrischen Größe (z. B. Strom), die von der Identifikationseinheit 3 zurückgegeben wurde, kann die Erkennungseinheit 7 nun die für die angeschlossene LED-Einheit 2 erforderliche Leistungsversorgung (Versorgungsspannung) bestimmen. Über eine optionale Steuereinheit 6 kann die Information über die Leistungsversorgung anschließend an eine in der Versorgungseinheit 1 vorgesehene Ausgabeeinheit 5 weitergeleitet werden, die zum Beispiel die nötige Versorgungsspannung für die LED-Einheit(en) 2 erzeugt und ausgibt. Hierzu schaltet die Steuereinheit 6 in den Schalterzustand B um, und die von der Ausgabeeinheit 5 erzeugte Leistungsversorgung der LED-Einheit(en) 2 erfolgt über die Versorgungsanschlüsse 4a, 4b.Depending on the electrical size (e.g. current) by the identification unit 3 has been returned, the recognition unit 7 can now be the one for the connected one LED unit 2 required power supply (supply voltage) determine. The information about the power supply can be supplied via an optional control unit 6 subsequent to one provided in the supply unit 1 Output unit 5 are forwarded, for example, the necessary supply voltage generated and output for the LED unit (s) 2. To do this, the control unit switches 6 in the switch state B, and that generated by the output unit 5 Power is supplied to the LED unit (s) 2 via the supply connections 4a, 4b.

Da auch die Identifikationseinheit 3 einen Leistungsverbraucher darstellt, kann diese etwa über einen durch ein Steuerelement 10 ausgelösten Schalter 12 optional abgeschaltet werden, wenn die Leistungsversorgung beginnt. Dies kann zum Beispiel dadurch geschehen, dass das Steuerelement 10 eine von der Versorgungseinheit 1 ausgegebene Versorgungsspannung erkennt und daraufhin den Schalter 12 in den offenen Zustand umschaltet, so dass ein Versorgungsstrom nur noch durch die LEDs 9 fließt.Since the identification unit 3 also represents a power consumer, it can optionally switched off via a switch 12 triggered by a control element 10 when the power supply begins. For example happen that the control element 10 one of the supply unit 1 recognized supply voltage and then detects the switch 12 in the open state switches so that a supply current only through the LEDs 9 flows.

Während der Leistungsversorgung kann in den Erkennungsmodus (Schalterstellung A) umgeschaltet werden, etwa um zu überprüfen, ob eine LED-Einheit 2 defekt oder ausgetauscht worden ist. Dadurch können die Versorgungsparameter während des Betriebs neu bestimmt und im Ausgabemodus (Schalterstellung 2) entsprechend angepasst werden. While the power supply is in the detection mode (switch position A) are switched over, for example to check whether an LED unit 2 is defective or has been replaced. As a result, the supply parameters during the Operation redefined and in output mode (switch position 2) accordingly be adjusted.

Durch den erfindungsgemäßen Aufbau können sowohl die Versorgung der LED-Einheiten 2 als auch die Erkennung der Identität, d. h. der Versorgungsparameter, der LED-Einheiten 2 ausschließlich über die Versorgungsanschlüsse 4a und 4b erfolgen. Weitere Leitungen oder Anschlüsse sind nicht notwendig, so dass der Einsatz komplizierter und komplexer Schaltungen zur LED-Versorgung vermieden wird.The structure according to the invention can both supply the LED units 2 as well as identity recognition, d. H. the supply parameters, of the LED units 2 take place exclusively via the supply connections 4a and 4b. Additional lines or connections are not necessary, so use complicated and complex circuits for LED supply is avoided.

Claims (13)

Versorgungseinheit (1) für wenigstens eine LED-Einheit (2), welche Versorgungseinheit (1) aufweist: eine Erkennungseinheit(7), ausgelegt zum Erkennen der Identität der LED-Einheit (2) über elektrische Größen, Versorgungsanschlüsse (4a, 4b) zur Leistungsversorgung der LED-Einheit (2) durch die Versorgungseinheit (1), dadurch gekennzeichnet, dass die Erkennung der Identität der LED-Einheit (2) über die Versorgungsanschlüsse (4a, 4b) erfolgt.Supply unit (1) for at least one LED unit (2), which supply unit (1) has: a recognition unit (7), designed to recognize the identity of the LED unit (2) via electrical quantities, Supply connections (4a, 4b) for the power supply of the LED unit (2) by the supply unit (1), characterized in that the identity of the LED unit (2) is identified via the supply connections (4a, 4b). Versorgungseinheit nach Anspruch 1, dadurch gekennzeichnet, dass sie weiter eine Steuereinheit (6) enthält, die auf der Grundlage der erkannten Identität der LED-Einheit die Leistungsversorgung der LED-Einheit (2) steuert.Supply unit according to claim 1, characterized in that it further contains a control unit (6) which controls the power supply of the LED unit (2) on the basis of the identified identity of the LED unit. Versorgungseinheit nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Erkennung und die Leistungsversorgung ausschließlich über die Versorgungsanschlüsse (4a, 4b) erfolgen.Supply unit according to one of claims 1 or 2, characterized in that the detection and the power supply take place exclusively via the supply connections (4a, 4b). Verfahren zur Erkennung der Identität wenigstens einer LED-Einheit (2), welches folgende Schritte aufweist: Bereitstellen einer ersten elektrischen Größe für die zu erkennende LED-Einheit (2), Erkennen der Identität der LED-Einheit (2) anhand einer von der LED-Einheit (2) im Ansprechen auf die erste elektrische Größe bereitgestellten zweiten elektrischen Größe, dadurch gekennzeichnet, dass das Erkennen der Identität über zur Leistungsversorgung der LED-Einheit (2) dienende Versorgungsanschlüsse (4a, 4b) erfolgt. Method for recognizing the identity of at least one LED unit (2), comprising the following steps: Providing a first electrical quantity for the LED unit (2) to be recognized, Recognizing the identity of the LED unit (2) on the basis of a second electrical variable provided by the LED unit (2) in response to the first electrical variable, characterized in that the identity is recognized via supply connections (4a, 4b) which serve to supply power to the LED unit (2). Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass es weiter die Steuerung der Leistungsversorgung der wenigstens einen LED-Einheit (2) auf der Grundlage der erkannten Identität der LED-Einheit (2) umfasst.Method according to claim 4, characterized in that it further comprises controlling the power supply of the at least one LED unit (2) on the basis of the identified identity of the LED unit (2). Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass es beim Betrieb der LED-Einheit (2) wiederholt ausgeführt wird.A method according to claim 4 or 5, characterized in that it is carried out repeatedly when the LED unit (2) is in operation. Verfahren nach einem der Ansprüche 4 - 6, dadurch gekennzeichnet, dass das Erkennen und die Leistungsversorgung der LED-Einheit (2) ausschließlich über die Versorgungsanschlüsse (4a, 4b) erfolgen.Method according to one of claims 4-6, characterized in that the detection and the power supply of the LED unit (2) take place exclusively via the supply connections (4a, 4b). Verfahren nach einem der Ansprüche 4 - 7, dadurch gekennzeichnet, dass zum Erkennen der Identität der LED-Einheit (2) eine im Verhältnis zur Leistungsversorgung kleine Spannung angelegt wird und die LED-Einheit (2) durch eine Impedanz einer Identifikationseinheit (3) erkannt wird,
wobei die Impedanz der Identifikationseinheit (3) gegenüber der bei der angelegten kleinen Spannung wirksamen LED-Impedanz klein ist.Method according to one of claims 4-7, characterized in that in order to recognize the identity of the LED unit (2) a voltage which is low in relation to the power supply is applied and the LED unit (2) is recognized by an impedance of an identification unit (3) becomes,
wherein the impedance of the identification unit (3) is small compared to the LED impedance effective at the applied low voltage. LED-Einheit (2) zum Anschließen an eine Versorgungseinheit (1) nach einem der Ansprüche 1 bis 3, aufweisend: wenigstens eine LED (9), Versorgungsanschlüsse (4a, 4b) zur Leistungsversorgung der Versorgungseinheit (1), und eine Identifikationseinheit (3) mit bei der Erkennung der Identität der LED-Einheit (2) erfassbaren technischen Eigenschaften, dadurch gekennzeichnet, dass die Identifikationseinheit (3) über die Versorgungsanschlüsse (4a, 4b) identifizierbar ist.LED unit (2) for connection to a supply unit (1) according to one of claims 1 to 3, comprising: at least one LED (9), Supply connections (4a, 4b) for supplying power to the supply unit (1), and an identification unit (3) with technical properties that can be detected when the identity of the LED unit (2) is identified, characterized in that the identification unit (3) can be identified via the supply connections (4a, 4b). LED-Einheit (2) nach Anspruch 9, dadurch gekennzeichnet, dass die Erkennung und Leistungsversorgung ausschließlich über zwei Versorgungsanschlüsse (4a, 4b) erfolgen kann. LED unit (2) according to claim 9, characterized in that the detection and power supply can take place exclusively via two supply connections (4a, 4b). LED-Einheit (2) nach Anspruch 9 oder 10, dadurch gekennzeichnet, dass die Identifikationseinheit (3) abschaltbar ist.LED unit (2) according to claim 9 or 10, characterized in that the identification unit (3) can be switched off. LED-Einheit (2) nach einem der Ansprüche 9 bis 11, dadurch gekennzeichnet, dass die Impedanz der Identifikationseinheit (3) gegenüber der bei einer an die LED-Einheit (2) angelegten im Verhältnis zur Leistungsversorgung kleinen Spannung wirksamen LED-Impedanz klein ist.LED unit (2) according to one of Claims 9 to 11, characterized in that the impedance of the identification unit (3) is small compared to the LED impedance which is effective when the voltage applied to the LED unit (2) is small in relation to the power supply , System bestehend aus einer Versorgungseinheit (1) nach einem der Ansprüche 1 bis 3 und wenigstens einer LED-Einheit (2) nach einem der Ansprüche 9 bis 12.System consisting of a supply unit (1) according to one of the claims 1 to 3 and at least one LED unit (2) according to one of the claims 9 to 12.
EP03014744A 2002-07-04 2003-06-27 LED supply and identification unit Expired - Lifetime EP1379108B1 (en)

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EP1379108B1 (en) 2006-09-27
ATE341184T1 (en) 2006-10-15

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