EP2522199A2 - Combined method for operating an electric illuminant and operating circuit - Google Patents

Combined method for operating an electric illuminant and operating circuit

Info

Publication number
EP2522199A2
EP2522199A2 EP11700393A EP11700393A EP2522199A2 EP 2522199 A2 EP2522199 A2 EP 2522199A2 EP 11700393 A EP11700393 A EP 11700393A EP 11700393 A EP11700393 A EP 11700393A EP 2522199 A2 EP2522199 A2 EP 2522199A2
Authority
EP
European Patent Office
Prior art keywords
led
dimming
pulse
current
amplitude
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11700393A
Other languages
German (de)
French (fr)
Other versions
EP2522199B1 (en
Inventor
Michael Zimmermann
Reinhold Juen
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.)
Tridonic GmbH and Co KG
Tridonic AG
Original Assignee
Tridonic GmbH and Co KG
Tridonic AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tridonic GmbH and Co KG, Tridonic AG filed Critical Tridonic GmbH and Co KG
Publication of EP2522199A2 publication Critical patent/EP2522199A2/en
Application granted granted Critical
Publication of EP2522199B1 publication Critical patent/EP2522199B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/20—Controlling the colour of the light
    • H05B45/22—Controlling the colour of the light using optical feedback
    • 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]
    • H05B45/20—Controlling the colour 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]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter 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]
    • H05B45/40—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 generally relates to lamp operating devices or systems and methods by means of which light sources such as light emitting diodes (LEDs) can be operated.
  • LEDs light emitting diodes
  • a particular field of application of the present invention is street lighting.
  • street lighting there is generally the problem that, due to different regulations regarding the distribution of light intensity at the bottom, the manufacturer of street lamps has to make very many different adjustments with regard to the light sources.
  • mechanical adjustments are currently being made, for example between the reflector and the light source, in particular the high-pressure lamp.
  • An LED street lamp has advantages in this regard in that at least two different LED module chains can be provided, and the light intensity distribution on the ground can be achieved by selectively dimming the at least two different LED modules.
  • Light chain modules can be adjusted.
  • a part of the previously made mechanical change for adjustment to local regulations is shifted to the field of lighting control, which brings logistical advantages.
  • LED street lights are operated via a pulse-modulated control of the LEDs, for example a PWM (Pulse Width Modulation) control.
  • PWM Pulse Width Modulation
  • this calibration takes place at the factory by reducing the maximum value of the duty cycle of the P M drive to less than 100%. In other words, for calibration purposes, the maximum turn-on duration of the pulse-modulated current to supply the LEDs is below 100%.
  • a problem that occurs is that when delivering such LED street lights typically one of the two LED chains is limited to maximum operation, which is below the maximum possible 100% duty cycle. In operation, when the street lamp is now dimmed to a low brightness, it is known that there may be a critical flicker in the generated light or critical stroboscopic effects.
  • a high dimming level range above 10% pure PWM (pulse width modulation) dimming is provided to prevent color change from occurring.
  • a mixed PWM amplitude dimming is provided in a third dimming phase between 2% and 10%.
  • the wavelength and color of the LEDs can be kept constant in the wide upper dimming range between 2% and 10%.
  • the LEDs are switched off thanks to amplitude dimming without the flickering or stroboscopic effects caused by PWM modulation in this area.
  • both techniques are used in such a way that the dimming behavior runs between 2% and 10% continuously and without noticeable step changes.
  • the invention is based on the object to improve a method and system for lighting described above.
  • the invention is based on the object that an LED-based lighting means, in particular LED street lights, can be configured such that negative effects such as flickering of the generated light or stroboscopic effects are as much as possible mitigated.
  • This object is solved by the features of the independent claims.
  • the dependent claims represent further embodiments of the invention. According to a first aspect of the invention, a method is proposed for operating at least one
  • Illuminant in particular a light emitting diode (LED) of an LED module.
  • the light emitting diode is operated by a pulse modulated current, wherein the turn-off duration of the pulse-modulated current is controllable by an external dimming command, and the amplitude of the pulse-modulated current is adjustable depending on a calibration.
  • this method is capable of dimming LED modules or LED chains in each case both by pulse width modulation (PWM) as well as amplitude. Furthermore, this method is capable of receiving incoming external dimming commands (from a bus such as DALI, motion sensors,
  • the switch-off duration of the pulse-modulated current may be controllable as a function of measurement data acquired externally by a sensor.
  • the amplitude of the pulse modulated current may be adjustable depending on a long term calibration.
  • the amplitude of the pulse modulated current can be used to set a maximum brightness to compensate for
  • Aging of the LED or to change the color temperature of the light generated by the LED be adjustable.
  • a plurality of LED modules or LEDs can be operated by a plurality of LED modules.
  • Each LED module can be supplied with a pulse modulated current, with the amplitude of the pulse modulated current being individually adjustable for each LED module.
  • the various pulse modulated currents for driving the individual LED modules may be modulated to be simultaneously set to the zero value.
  • the positive edge of the pulse modulated current for operating one of the LED modules may be offset in time from the positive edge of the pulse modulated current to operate another one of the LED modules.
  • At least two LED modules can be operated in such a way that a single dimming command results in the simultaneous dimming of the at least two LED modules (4, 5).
  • Another aspect of the invention relates to methods for operating at least two separately controllable LED modules, each having at least one LED, wherein the current amplitude of at least two LED modules are different, preferably over a dimming period constant values, and
  • an operating device for operating at least one luminous means, in particular a light-emitting diode (LED) of an LED module.
  • LED light-emitting diode
  • the operating device has a supply input for supplying the operating device with electrical energy, a data input for receiving control or dimming commands, at least one output for supplying an LED module, at least one LED module supply unit for supplying the LED module with a pulse modulated current, and a control unit for determining the turn-off duration of the pulse-modulated current in response to an external dimming command, and for determining the amplitude of the pulse-modulated current as a function of a calibration.
  • Another aspect of the invention relates to a method for driving at least one LED
  • the dimming area is subdivided into at least two subregions in which the routing is performed in a different manner from the variation of the amplitude or a parameter of a pulse modulation of the current through the LED (s) or a combination thereof
  • a control takes place by changing the current amplitude
  • the operating device may have a direct current source for providing a constant direct current starting from a supply voltage provided at the supply input. Furthermore, the operating device may have a memory for storing calibration data.
  • Fig. 2 shows a schematic representation of a
  • FIG. 3 shows an embodiment of a schematic block diagram for an operating circuit for operating two LED modules
  • Fig. 4 shows a representation of the temporal
  • FIG. 5 shows an illustration of the chronological progression of the pulse modulation of the supply current for the LED modules or the switching on and off of the pulse-modulated current as a function of dimming
  • FIG. 6 shows a representation of the chronological progression of the pulse modulation of the supply current for the LED Modules or the switching on and off of the pulse-modulated current as a function of dimming
  • FIG. 8 shows an illustration of the time profile of the pulse modulation of the supply current for the LED modules in the case of a 100% dimming according to the invention.
  • Fig. 1 shows an embodiment of the invention with reference to a street lamp 1.
  • the street lamp 1 includes by default a lamppost 3, which is firmly connected to the ground 12 or with a road surface.
  • a lamp 2 is mounted in the upper region of the lamppost 3.
  • the lamp 2 is anchored at the upper end of the cylindrical lamppost 3.
  • the luminaire 2 comprises at least one luminous means, for example in the form of a light-emitting diode (LED), wherein the LED can be an inorganic and an organic LED.
  • the luminaire 2 preferably comprises at least two lighting means in the form of two LED modules 4, 5, which are each supplied with power via a power supply line 8.
  • a control line 9 leads to the LED modules 4, 5 for external control of the operation and, for example, the brightness of the LED modules 4, 5.
  • the LED street lamp 1 is equipped with two different light cones, which can be individually mixed with each other.
  • the LED modules 4, 5 preferably produce different illuminations on the floor 12.
  • a first LED module 4 illuminates a first area 6 on the floor and a second area 7 ⁇ , 7 , ⁇ on a second area.
  • the area illuminated by the second LED module may consist of two subregions 7 ⁇ , 7 , ⁇ , which are respectively positioned on both sides of the first area 6. These three areas may overlap slightly to ensure continuous lighting on the floor.
  • the lighting system 10 shows a lighting system 10 with two street lamps 1, 1, wherein a region of the road surface 12 is illuminated both by the one 1 and by the second street lamp 1 ⁇ .
  • the number of street lamps can be greater than two.
  • the lighting system 10 further includes a data bus 11.
  • An example of such a bus 11 is a DALI (Digital Addressable Lighting Interface) bus for implementing the DALI protocol for controlling lighting equipment.
  • the respective control lines 9, 9 X of the street lamps 1, 1 x are connected to the data bus 11, so that the light distribution or the brightness of the illumination system 10 can be controlled centrally by a control unit 14, for example.
  • the control can be performed by any unit connected to the data bus 11.
  • At least one sensor 13 may be provided.
  • the sensor 13 may, for example, be a motion sensor, a daylight sensor, or a rain sensor. It can also be a photosensor for detecting aging effects or
  • the decisive factor is that the sensor is network-capable, and transmits via the data bus 11 measurement data for a specific property of the environment of the illumination system 10, such as the temperature, the brightness or a movement.
  • These measurement data are processed by the central control unit 14, which in turn can send out corresponding dimming commands via the data bus 11.
  • a plurality of sensors 13 are provided, so that the outgoing control unit 14 has several measurement data available.
  • the sensor 13 may itself convert and transmit the measurement data in dimming commands.
  • the measurement data are recorded directly from the individual street lamps 1, 1, evaluated, and converted into a suitable control of the LED modules 4, 5.
  • FIG. 3 shows a schematic representation of an operating device according to the invention for LEDs or an operating device for at least two LED channels.
  • the operating device 20 of the luminaire 2 comprises a control unit 21, a first module supply unit 24, a second module supply unit 25, a memory 22 and a DC power source 26.
  • the operating device has two inputs, namely a first input 28 for the power supply via the Power supply line 8 and a second input 29 for receiving data that are sent via the line 9 and the data bus 11. These data are preferably control or dimming commands for controlling the LEDs or their brightness. Alternatively or additionally, the operating device 20 may also receive other types of data, such as measurement data from a sensor 13 or calibration data. According to further embodiments, the operating device 20 is designed such that it can also send itself data such as confirmation data or status data via the line 9 in the bus 11.
  • the central unit of the operating device 20 is the control unit, which processes the data received via the second input 29 and performs corresponding control of the LED modules 4, 5. The supply of the LED modules 4, 5 via the corresponding first module supply unit 24 and the second module supply unit 25th
  • the operating device 20 can control several channels independently of each other.
  • Each channel can control one LED module. These may be, for example, LED arrays with blue LEDs that emit white light using a color conversion agent. It is also possible that each channel drives a different LED color. It should be pointed out in advance that the inventive method is by no means limited to two channels. Rather, it is possible that the method involves three or more channels. For three channels it is e.g. It is conceivable that one channel controls red LEDs, one channel green LEDs and one channel blue LEDs.
  • the DC power source 26 is supplied in operation via the first input 28 from the AC mains with AC voltage. At its output, the DC power source 26 provides a constant DC current 10 available.
  • the DC power source 26 preferably comprises a rectifier for rectifying the mains voltage, a voltage converter for reducing the rectified mains voltage, and a converter for generating the direct current 10.
  • the memory 22 contains data which are preferably used to calibrate the luminaire 2.
  • This data can be up refer to the aging process of the LEDs, to a maximum brightness value not to be exceeded, or, for example, to a desired adjustment of the color temperature of the generated light.
  • Preferably, such data relate to one of the LED modules 4, 5, or to all the LED modules of the luminaire.
  • the data can be stored in the memory 22 in the factory in advance. However, the data can also be stored in operation via the line 9 from the control unit 21 in the memory 22.
  • control unit 21 is now able either to read the calibration data stored in the memory 22 or also to receive calibration data via the line 9 and the bus 11.
  • the control unit 21 calculates accordingly
  • FIG. 4 shows an illustration of the time profile of the amplitude of the supply current for the LED modules 4, 5.
  • the amplitude 10.4 of the pulse-modulated current 14 for the first LED module 4 corresponds to the amplitude of the direct current 10 provided by the DC power source 26. That is to say, the first LED module 4 is not to be calibrated, or that its maximum brightness does not have to be reduced.
  • the maximum amplitude 10.5 of the pulse-modulated current 15 for the second LED module 5 is smaller than the rated direct current 10. Accordingly, the LEDs 23 of the second LED module 5 become in the same dimming conditions generate darker light than that of the first LED module 4.
  • the first module supply unit 24 is supplied by the direct current 10 and controlled by the control unit 21.
  • the module supply unit 24 receives from the control unit 21 information regarding the maximum amplitude 10.4 of the pulse-modulated current 14, and accordingly generates a pulse-modulated current 14, shown in FIG. 5, having a maximum amplitude 10.4 and a duty cycle T1 / T0 ,
  • the LED module 4 is operated by this current 14, and consists of a plurality of LEDs 23, which are combined by parallel and / or series connection.
  • the structure and operation of the second module supply unit 25 and the second LED module 5 are similar to those of the first module supply unit 24 and the first LED module 4th
  • FIG. 6 shows a further embodiment of the invention or a representation of the time profile of the modulation of the supply current 14, 15 for the LED modules 4, 5.
  • the two LED modules 4, 5 and the two channels are PWM-operated in this embodiment, each with a duty cycle of 30%.
  • the maximum amplitude of the pulse modulated current I4 X , 15 of the two channels is set to the values 10.4, 10.5 according to a calibration.
  • the PWM pulses of the two channels are timed to each other such that a PWM pulse of the first channel is in the PWM off period of the second channel. This means that the one or more LEDs connected to or driven by the first channel will light up when the one or more LEDs of the second channel are turned off.
  • a PWM pulse of the first channel is preferably in the middle of the PWM off period of the second channel.
  • the positive edge of a PWM pulse of the first channel may coincide in time with the negative edge of a PWM pulse of the second channel.
  • no light H is generated during 70% of the time.
  • illumination H is now generated only during 40% of the time.
  • the switch-off times of the total lighting are reduced from 70% to 40% of the PWM period.
  • the PWM pulses of the two channels are timed to each other so that a PWM pulse of the first channel is possible in the PWM AusschaltZeitdauer the second channel. As shown in FIGS.
  • the duty ratio remains at 100%, and the maximum amplitude of the PWM current is lowered to 80% of the rated current 10.
  • the adaptation to the local conditions is achieved according to the invention by pure amplitude dimming.
  • the effect is achieved that at 100% dimming operation optimum light quality in terms of 100% duty cycle is present.
  • negative effects such as flickering or stroboscopic effects are alleviated because in such a low dimming range the duty cycle according to the invention is greater than the duty cycle of the prior art.
  • Another advantage is that now the two or even more LED channels or LED modules 4, 5 of a single lamp 2 need not be controlled with different PWM values to possibly make a different calibration can, but as a single control channel can be treated. This is made possible by the fact that, starting now from the possibly differently set amplitude values 10.4, 10.5, the PWM duty cycles are changed simultaneously for all channels. Thus, for example, with a single DALI command the concurrent dimming of multiple channels of the same luminaire can be achieved.
  • incoming dimming commands are always converted only in one change of the duty cycle (PWM dimming), although the drive circuit can drive at least two LED module strings both by amplitude dimming and by PWM dimming.
  • the PWM dimming between 0 and 100% duty cycle is reserved for the conversion of incoming dimming commands. All other adaptation effects (aging compensation, adjustment to local regulations, etc.) are achieved by amplitude dimming. In particular with regard to the compensation of aging effects of the LEDs, it can be provided that all LED module chains in the delivered state are first operated with an amplitude value below 100% nominal value 10 of the current, in order to achieve a sufficient margin to compensate for aging effects.
  • the two different LED channels controlled by the control unit can each be the same color, in particular white. However, it can also be different colors, so that one
  • Color compensation by means of amplitude dimming takes place while the actual dimming in the sense of converting from external dimming commands via PWM dimming is based on a duty cycle of 100%.

Abstract

The invention relates to a method for operating at least one illuminant, in particular a light-emitting diode (LED) (23) of an LED module (4, 5), in which the light-emitting diode (23) is operated by a pulse-modulated current (I4, I5), wherein the deactivation duration (T2) of the pulse-modulated current (I4, I5) can be controlled by an external dimming command, and the amplitude (I0, 4, I0, 5) of the pulse-modulated current can be set depending on a calibration.

Description

Kombiniertes Verfahren zum Betreiben eines elektrischen Leuchtmittels sowie Betriebsschaltung Combined method for operating an electrical lamp and operating circuit
Die vorliegende Erfindung bezieht sich allgemein auf Lampenbetriebsgeräte bzw. Systeme sowie Verfahren mittels denen Leuchtmittel wie beispielsweise Leuchtdioden (LEDs) betrieben werden können. The present invention generally relates to lamp operating devices or systems and methods by means of which light sources such as light emitting diodes (LEDs) can be operated.
Ein besonderes Anwendungsgebiet der vorliegenden Erfindung ist die Straßenbeleuchtung. Bei Straßenbeleuchtung besteht allgemein das Problem, dass aufgrund unterschiedlicher Vorschriften hinsichtlich der Lichtstärkenverteilung am Boden der Hersteller von Straßenlaternen sehr viele unterschiedliche Einstellungen vorzunehmen hat hinsichtlich der Leuchtmittel. Um je nach Laternenabstand und Masthöhe die gewünschte Lichtverteilung am Boden zu erzielen, werden zurzeit noch mechanische Einstellungen beispielsweise zwischen Reflektor und Lichtquelle, insbesondere Hochdrucklampe, vorgenommen. A particular field of application of the present invention is street lighting. In the case of street lighting, there is generally the problem that, due to different regulations regarding the distribution of light intensity at the bottom, the manufacturer of street lamps has to make very many different adjustments with regard to the light sources. In order to achieve the desired light distribution on the ground, depending on the distance between the lantern and the height of the mast, mechanical adjustments are currently being made, for example between the reflector and the light source, in particular the high-pressure lamp.
Eine LED-Straßenlaterne hat diesbezüglich Vorteile, als dass wenigstens zwei unterschiedliche LED-Modulketten vorgesehen werden können, und die sich am Boden einstellende Lichtstärkeverteilung durch selektives Dimmen der wenigstens zwei unterschiedlichen LED-An LED street lamp has advantages in this regard in that at least two different LED module chains can be provided, and the light intensity distribution on the ground can be achieved by selectively dimming the at least two different LED modules.
Lichtkettenmodule eingestellt werden kann. Somit wird also ein Teil der bisher vorgenommenen mechanischen Veränderung zur Einstellung auf lokale Vorschriften auf den Bereich der Beleuchtungs-Ansteuerung verlagert, was logistisch Vorteile bringt. Gemäß dem Stand der Technik ist es bekannt, dass LED- Straßenlaternen über eine pulsmodulierte Ansteuerung der LEDs, beispielsweise eine PWM ( Pulsbreitenmodulation) - Ansteuerung betrieben werden. Um die gewünschte Lichtverteilung am Boden zu erzielen, kann es erforderlich sein, die Helligkeit der LEDs zu kalibrieren. Bekannt ist es weiterhin, dass diese Kalibrierung werksseitig durch Verringerung des Maximalwertes des Tastverhältnisses der P M-Ansteuerung auf unter 100% erfolgt. Anders ausgedrückt, liegt zwecks Kalibrierung die maximale Einschalt Zeitdauer des pulsmodulierten Stroms zur Versorgung der LEDs unterhalb von 100%. Light chain modules can be adjusted. Thus, a part of the previously made mechanical change for adjustment to local regulations is shifted to the field of lighting control, which brings logistical advantages. According to the prior art, it is known that LED street lights are operated via a pulse-modulated control of the LEDs, for example a PWM (Pulse Width Modulation) control. In order to achieve the desired light distribution on the ground, it may be necessary to calibrate the brightness of the LEDs. It is also known that this calibration takes place at the factory by reducing the maximum value of the duty cycle of the P M drive to less than 100%. In other words, for calibration purposes, the maximum turn-on duration of the pulse-modulated current to supply the LEDs is below 100%.
Ein Problem das dabei auftritt, ist, dass also bei Auslieferung von derartigen LED-Straßenlaternen typischerweise eine der beiden LED-Ketten auf einen maximalen Betrieb begrenzt ist, der unterhalb des maximal möglichen 100% Tastverhältnis liegt. Wenn im Betrieb die Straßenlaterne nun auf eine niedrige Helligkeit gedimmt wird, kann es bekanntlich zu einem kritischen Flackern des erzeugten Lichts oder zu kritischen Stroboskopeffekten kommen . A problem that occurs is that when delivering such LED street lights typically one of the two LED chains is limited to maximum operation, which is below the maximum possible 100% duty cycle. In operation, when the street lamp is now dimmed to a low brightness, it is known that there may be a critical flicker in the generated light or critical stroboscopic effects.
Aus der EP 1 689 212 AI ist ein Verfahren zum Dimmen von LEDs bekannt, bei dem insgesamt drei unterschiedliche Dimmphasen vorgesehen sind. Im niedrigen Dimmpegelbereich zwischen 0 und 2% ist ein reines Amplituden-Dimmen vorgesehen: die LEDs werden mit einem konstantem Strom versorgt, der entsprechend des Dimm-Pegels auf nur einen Teil des zur Verfügen stehenden maximalen Nennstroms herabgestuft wird. Dieses Amplituden-Dimmen wird nur in einem niedrigen Dimmpegelbereich angewendet zwischen 0 und 2%, um im restlichen Dimmbereich die nachteilige Wellenlängenverschiebung und den damit verbundenen Farbwechsel des erzeugten Lichts zu vermeiden. From EP 1 689 212 A1 a method for dimming LEDs is known in which a total of three different dimming phases are provided. In the low dimming level range between 0 and 2%, pure amplitude dimming is provided: the LEDs are supplied with a constant current which, according to the dimming level, is downgraded to only a part of the maximum rated current available. This amplitude dimming is only applied in a low dimming level range between 0 and 2%, in order to avoid the detrimental residual dimming range To avoid wavelength shift and the associated color change of the generated light.
In einem hohen Dimmpegelbereich über 10% ist ein reines PWM ( Pulsbreitenmodulation) -Dimmen vorgesehen, das ein Auftreten von Farbwechsel verhindert. In einer dritten Dimmphase zwischen 2% und 10% ist schließlich ein gemischtes PWM-Amplituden-Dimmen vorgesehen. Mit dieser bekannten drei Dimmphasen-Steuerung kann im breiten oberen Dimmbereich zwischen 2% und 10% die Wellenlänge und die Farbe der LEDs konstant gehalten werden. Im niedrigen Dimmbereich erfolgt das Ausschalten der LEDs dank Amplituden-Dimmen ohne die in diesem Bereich von PWM-Modulation verursachten Flackern- oder Stroboskopeffekte . Im mittleren Bereich werden schließlich beide Techniken derart benutzt, dass das Dimmverhalten zwischen 2% und 10% kontinuierlich und ohne wahrnehmbarer Schrittwechsel abläuft. In a high dimming level range above 10%, pure PWM (pulse width modulation) dimming is provided to prevent color change from occurring. Finally, in a third dimming phase between 2% and 10%, a mixed PWM amplitude dimming is provided. With this well-known three dimming phase control, the wavelength and color of the LEDs can be kept constant in the wide upper dimming range between 2% and 10%. In the low dimming range, the LEDs are switched off thanks to amplitude dimming without the flickering or stroboscopic effects caused by PWM modulation in this area. Finally, in the middle range, both techniques are used in such a way that the dimming behavior runs between 2% and 10% continuously and without noticeable step changes.
Der Erfindung liegt nun die Aufgabe zugrunde, ein eingangs beschriebenes Verfahren bzw. System zur Beleuchtung zu verbessern. Insbesondere liegt der Erfindung die Aufgabe zugrunde, dass ein LED-basiertes Leuchtmittel, insbesondere LED-Straßenlaterne, derart konfiguriert werden kann, dass negative Effekte wie Flackern des erzeugten Lichts oder Stroboskopeffekte möglichst abgemildert werden. Diese Aufgabe wird durch die Merkmale der unabhängigen Ansprüche gelöst. Die abhängigen Ansprüche stellen weitere Ausgestaltungsformen der Erfindung dar. Nach einem ersten Aspekt der Erfindung ist ein Verfahren vorgeschlagen zum Betreiben wenigstens einesThe invention is based on the object to improve a method and system for lighting described above. In particular, the invention is based on the object that an LED-based lighting means, in particular LED street lights, can be configured such that negative effects such as flickering of the generated light or stroboscopic effects are as much as possible mitigated. This object is solved by the features of the independent claims. The dependent claims represent further embodiments of the invention. According to a first aspect of the invention, a method is proposed for operating at least one
Leuchtmittels, insbesondere einer Leuchtdiode (LED) eines LED-Moduls. Bei dem Verfahren wird die Leuchtdiode von einem pulsmodulierten Strom betrieben, wobei die AusschaltZeitdauer des pulsmodulierten Stroms von einem externen Dimm-Befehl steuerbar ist, und die Amplitude des pulsmodulierten Stroms abhängig von einer Kalibrierung einstellbar ist. Illuminant, in particular a light emitting diode (LED) of an LED module. In the method, the light emitting diode is operated by a pulse modulated current, wherein the turn-off duration of the pulse-modulated current is controllable by an external dimming command, and the amplitude of the pulse-modulated current is adjustable depending on a calibration.
Vorteilhaft ist also, dass dieses Verfahren in der Lage ist, LED-Module bzw. LED-Ketten jeweils sowohl durch Pulsbreitenmodulation (PWM) wie auch über Amplitude zu dimmen. Weiterhin ist dieses Verfahren in der Lage, eingehende externe Dimmbefehle (von einem Bus wie beispielsweise DALI, Bewegungssensoren,It is therefore advantageous that this method is capable of dimming LED modules or LED chains in each case both by pulse width modulation (PWM) as well as amplitude. Furthermore, this method is capable of receiving incoming external dimming commands (from a bus such as DALI, motion sensors,
Tageslichtsensoren, etc.) in einem PWM-Dimmen umzusetzen, während das Amplituden-Dimmen zur Kompensation langfristiger Effekte (lokale Anpassung, Alterungseffekte, Temperatur, Temperatursensor) verwendet werden. Daylight sensors, etc.) in a PWM dimming, while the amplitude dimming to compensate for long-term effects (local adjustment, aging effects, temperature, temperature sensor) are used.
Die Ausschaltzeitdauer des pulsmodulierten Stroms kann abhängig von extern von einem Sensor erfassten Messdaten steuerbar sein. The switch-off duration of the pulse-modulated current may be controllable as a function of measurement data acquired externally by a sensor.
Die Amplitude des pulsmodulierten Stroms kann abhängig von einer langfristigen Kalibrierung einstellbar ist. The amplitude of the pulse modulated current may be adjustable depending on a long term calibration.
Die Amplitude des pulsmodulierten Stroms kann zum Einstellen einer maximalen Helligkeit, zum Ausgleich derThe amplitude of the pulse modulated current can be used to set a maximum brightness to compensate for
Alterung der LED oder zur Änderung der Farbtemperatur des von der LED erzeugten Lichts einstellbar sein. Vorzugsweise können mehrere LED-Module bzw. LEDs von mehreren LED-Modulen betrieben werden. Aging of the LED or to change the color temperature of the light generated by the LED be adjustable. Preferably, a plurality of LED modules or LEDs can be operated by a plurality of LED modules.
Jedes LED-Modul kann mit einem pulsmodulierten Strom versorgt werden, wobei die Amplitude des pulsmodulierten Stroms individuell für jedes LED-Modul einstellbar ist. Each LED module can be supplied with a pulse modulated current, with the amplitude of the pulse modulated current being individually adjustable for each LED module.
Die verschiedenen pulsmodulierten Ströme zum Betreiben der einzelnen LED-Module können derart moduliert sein, dass sie gleichzeitig auf den Null-Wert gesetzt werden. The various pulse modulated currents for driving the individual LED modules may be modulated to be simultaneously set to the zero value.
Die positive Flanke des pulsmodulierten Stroms zum Betreiben von einem der LED-Module kann mit der positiven Flanke des pulsmodulierten Stroms zum Betreiben von einem anderen der LED-Module zeitlich versetzt sein. The positive edge of the pulse modulated current for operating one of the LED modules may be offset in time from the positive edge of the pulse modulated current to operate another one of the LED modules.
Vorzugsweise können mindestens zwei LED-Module derart betrieben werden, dass ein einziger Dimm-Befehl das gleichlaufende Dimmen von den mindestens zwei LED-Modulen (4, 5) zur Folge hat. Preferably, at least two LED modules can be operated in such a way that a single dimming command results in the simultaneous dimming of the at least two LED modules (4, 5).
Ein weiterer Aspekt der Erfindung betrifft Verfahren zum Betrieb von wenigstens zwei getrennt ansteuerbaren LED- Modulen, die jeweils wenigstens eine LED aufweisen, wobei die Stromamplitude von wenigstens zwei LED-Modulen unterschiedliche, vorzugsweise über einen Dimmzeitraum konstante Werte ist, und Another aspect of the invention relates to methods for operating at least two separately controllable LED modules, each having at least one LED, wherein the current amplitude of at least two LED modules are different, preferably over a dimming period constant values, and
interne oder externe Dimmbefehle in eine für die beiden LED-Module gleichlaufende Veränderung eines leistungsbestimmenden Parameters, insbesondere des Tastverhätnisses, einer Pulsbreitenmodulation des Stroms durch die LED-Module ungesetzt werden. Nach einem weiteren Aspekt der Erfindung ist ein Betriebsgerät vorgesehen zum Betreiben wenigstens eines Leuchtmittels, insbesondere einer Leuchtdiode (LED) eines LED-Moduls. Das Betriebsgerät weist auf einen Versorgungseingang zur Versorgung des Betriebsgeräts mit elektrischer Energie, einen Dateneingang zum Empfang von Steuer- bzw. Dimm-Befehlen, mindestens einen Ausgang zur Versorgung eines LED-Moduls, mindestens eine LED-Modul- Versorgungseinheit zur Versorgung des LED-Moduls mit einem pulsmodulierten Strom, und eine Steuereinheit zur Bestimmung der Ausschalt Zeitdauer des pulsmodulierten Stroms abhängig von einem externen Dimm-Befehl, und zur Bestimmung der Amplitude des pulsmodulierten Stroms abhängig von einer Kalibrierung. internal or external dimming commands in one for the two LED modules concurrent change of a power-determining parameter, in particular the Tastverhätnisses, a pulse width modulation of the current are set by the LED modules. According to a further aspect of the invention, an operating device is provided for operating at least one luminous means, in particular a light-emitting diode (LED) of an LED module. The operating device has a supply input for supplying the operating device with electrical energy, a data input for receiving control or dimming commands, at least one output for supplying an LED module, at least one LED module supply unit for supplying the LED module with a pulse modulated current, and a control unit for determining the turn-off duration of the pulse-modulated current in response to an external dimming command, and for determining the amplitude of the pulse-modulated current as a function of a calibration.
Ein weiterer Aspekt der Erfindung betrifft ein Verfahren zum Dirnmen wenigstens einer LED, Another aspect of the invention relates to a method for driving at least one LED,
wobei der Dimmbereich in wenigstens zwei Unterbereiche unterteilt ist, in denen das Dirnmen in unterschiedlicher Weise ausgewählt aus der Veränderung der Amplitude oder eines Parameters einer Pulsmodulation des Strom durch die LED(s) oder einer Kombination davon ausgeführt wird, wobei wherein the dimming area is subdivided into at least two subregions in which the routing is performed in a different manner from the variation of the amplitude or a parameter of a pulse modulation of the current through the LED (s) or a combination thereof
- in einem ersten Bereich, der zwischen einem festen oder einstellbaren Dimm-Schwellenwert und 100% Dimmwert liegt, ein Dirnmen durch Veränderung der Stromamplitude erfolgt, und  in a first range, which lies between a fixed or adjustable dimming threshold and 100% dimming value, a control takes place by changing the current amplitude, and
erst in einem zweiten Bereich unterhalb des Dimm- Schwellenwerts eine Veränderung des Pulsmodulations- Parameters, insbesondere eine Verringerung des Tastverhältnisses, ggf- in Kombination mit einer Veränderung der Stromamplitude erfolgt. Der erste Bereich kann dabei reserviert sein zur Kompensation oder Kalibrierung hinsichtlich Effekten, die bezüglich der Frequenz von Dimmbefehlen langfristig sind. Weiterhin kann das Betriebsgerät eine Gleichstromquelle zur Bereitstellung eines konstanten Gleichstroms ausgehend von einer am Versorgungseingang zur Verfügung gestellten Netzspannung aufweisen. Weiterhin kann das Betriebsgerät einen Speicher zur Speicherung von Kalibrierungsdaten aufweisen. Only in a second range below the dimming threshold value is a change in the pulse modulation parameter, in particular a reduction in the duty cycle, possibly in combination with a change in the current amplitude. The first area may be reserved for compensation or calibration for effects that are long term in the frequency of dimming commands. Furthermore, the operating device may have a direct current source for providing a constant direct current starting from a supply voltage provided at the supply input. Furthermore, the operating device may have a memory for storing calibration data.
Weitere Merkmale, Vorteile und Eigenschaften der vorliegenden Erfindung sollen nunmehr anhand der Figuren der beigefügten Zeichnungen sowie der detaillierten Erläuterung der Ausführungsbeispiele näher erläutert werden . zeigt eine schematische Darstellung eines Ausführungsbeispiels der Erfindung basierend auf einer Straßenlaterne, Other features, advantages and features of the present invention will now be described with reference to the figures of the accompanying drawings and the detailed explanation of the embodiments. shows a schematic representation of an embodiment of the invention based on a street lamp,
Fig. 2 zeigt eine schematische Darstellung eines Fig. 2 shows a schematic representation of a
Beleuchtungssystems basierend auf Straßenlaternen nach Fig. 1,  Lighting system based on street lamps according to Fig. 1,
Fig. 3 zeigt eine Ausführungsform eines schematisierten Blockschaltbildes für eine Betriebsschaltung zum Betreiben von zwei LED- Modulen, 3 shows an embodiment of a schematic block diagram for an operating circuit for operating two LED modules,
Fig. 4 zeigt eine Darstellung des zeitlichen Fig. 4 shows a representation of the temporal
Verlaufs der Amplitude des Versorgungsstroms für die LED-Module bzw. die Amplitude des pulsmodulierten Stroms abhängig von einer Kalibrierung, History of the amplitude of the supply current for the LED modules or the amplitude of the pulse modulated current depending on a calibration,
Fig. 5 zeigt eine Darstellung des zeitlichen Verlaufs der Pulsmodulation des Versorgungsstroms für die LED-Module bzw. das Ein- und Ausschalten des pulsmodulierten Stroms abhängig von einem Dimmen, Fig. 6 zeigt eine Darstellung des zeitlichen Verlaufs der Pulsmodulation des Versorgungsstroms für die LED-Module bzw. das Ein- und Ausschalten des pulsmodulierten Stroms abhängig von einem Dimmen, 5 shows an illustration of the chronological progression of the pulse modulation of the supply current for the LED modules or the switching on and off of the pulse-modulated current as a function of dimming, FIG. 6 shows a representation of the chronological progression of the pulse modulation of the supply current for the LED Modules or the switching on and off of the pulse-modulated current as a function of dimming,
Fig. 7 zeigt eine Darstellung des zeitlichen Verlaufs der Pulsmodulation des Versorgungsstroms für die LED-Module bei einem 100%-Dimmen gemäß dem Stand der Technik, und 7 shows an illustration of the time profile of the pulse modulation of the supply current for the LED modules in a 100% dimming according to the prior art, and
Fig. 8 zeigt eine Darstellung des zeitlichen Verlaufs der Pulsmodulation des Versorgungsstroms für die LED-Module bei einem 100%-Dimmen gemäß Erfindung . 8 shows an illustration of the time profile of the pulse modulation of the supply current for the LED modules in the case of a 100% dimming according to the invention.
Fig. 1 zeigt ein erfindungsgemäßes Ausführungsbeispiel mit Bezug auf eine Straßenlaterne 1. Die Straßenlaterne 1 umfasst standardweise einen Laternenmast 3, der mit dem Boden 12 bzw. mit einem Straßenbelag fest verbunden ist. Eine Leuchte 2 ist im oberen Bereich des Laternenmastes 3 befestigt. Vorzugsweise wird die Leuchte 2 am oberen Ende des zylinderförmigen Laternenmastes 3 verankert. Die Leuchte 2 umfasst mindestens ein Leuchtmittel beispielsweise in Form einer Leuchtdiode (LED) , wobei die LED eine anorganische sowie eine organische LED sein kann. Die Leuchte 2 umfasst vorzugsweise mindestens zwei Leuchtmittel in Form von zwei LED-Modulen 4, 5, die jeweils über eine Stromversorgungsleitung 8 mit Strom versorgt werden. Zusätzlich zu der Stromversorgungsleitung 8 führt noch eine Steuerleitung 9 zu den LED-Modulen 4, 5 zur externen Steuerung des Betriebs und bspw. der Helligkeit der LED-Modulen 4, 5. Fig. 1 shows an embodiment of the invention with reference to a street lamp 1. The street lamp 1 includes by default a lamppost 3, which is firmly connected to the ground 12 or with a road surface. A lamp 2 is mounted in the upper region of the lamppost 3. Preferably, the lamp 2 is anchored at the upper end of the cylindrical lamppost 3. The luminaire 2 comprises at least one luminous means, for example in the form of a light-emitting diode (LED), wherein the LED can be an inorganic and an organic LED. The luminaire 2 preferably comprises at least two lighting means in the form of two LED modules 4, 5, which are each supplied with power via a power supply line 8. In addition to the power supply line 8, a control line 9 leads to the LED modules 4, 5 for external control of the operation and, for example, the brightness of the LED modules 4, 5.
Die LED-Straßenlaterne 1 ist mit zwei unterschiedlichen Lichtkegeln ausgestattet, die individuell miteinander vermischt werden können. Die LED-Module 4, 5 erzeugen vorzugsweise verschiedene Beleuchtungen am Boden 12. Ein erstes LED-Modul 4 beleuchtet am Boden einen ersten Bereich 6 und ein zweites LED-Modul 5 ein zweiten Bereich 7Λ, 7, Λ. Der von dem zweiten LED-Modul beleuchtete Bereich kann aus zwei Unterbereichen 7λ, 7, Λ bestehen, die jeweils auf beiden Seiten des ersten Bereichs 6 positioniert sind. Diese drei Bereiche können leicht überlappen, um eine durchgehende Beleuchtung am Boden zu gewährleisten. The LED street lamp 1 is equipped with two different light cones, which can be individually mixed with each other. The LED modules 4, 5 preferably produce different illuminations on the floor 12. A first LED module 4 illuminates a first area 6 on the floor and a second area 7 Λ , 7 , Λ on a second area. The area illuminated by the second LED module may consist of two subregions 7 λ , 7 , Λ , which are respectively positioned on both sides of the first area 6. These three areas may overlap slightly to ensure continuous lighting on the floor.
Mit dieser Ausgestaltung der LED-Module 4, 5 kann erzielt werden, dass durch selektives Dimmen der wenigstens zwei unterschiedlichen LED-Module 4, 5 verschiedene Lichtstärkeverteilungen am Boden eingestellt werden können . With this configuration of the LED modules 4, 5 can be achieved that 5 different light intensity distributions can be adjusted at the bottom by selectively dimming the at least two different LED modules 4, 5.
Fig. 2 zeigt ein Beleuchtungssystem 10 mit zwei Straßenlaternen 1, 1 wobei ein Bereich des Straßenbelags 12 sowohl von der einen 1 als auch von der zweiten Straßenlaterne 1 Λ beleuchtet wird. Die Anzahl der Straßenlaternen kann größer als zwei sein. Das Beleuchtungssystem 10 umfasst weiterhin einen Datenbus 11. Ein Beispiel für einen derartigen Bus 11 ist ein DALI (Digital Addressable Lighting Interface) -Bus zur Ausführung des DALI Protokoll zur Steuerung lichttechnischer Betriebsgeräte. Am Datenbus 11 sind die jeweiligen Steuerleitungen 9, 9X der Straßenlaternen 1, lx angeschlossen, so dass die Lichtverteilung oder die Helligkeit des Beleuchtungssystems 10 bspw. zentral von einer Steuereinheit 14 gesteuert werden kann. Die Steuerung kann von einer beliebigen am Datenbus 11 angeschlossenen Einheit durchgeführt werden. 2 shows a lighting system 10 with two street lamps 1, 1, wherein a region of the road surface 12 is illuminated both by the one 1 and by the second street lamp 1 Λ . The number of street lamps can be greater than two. The lighting system 10 further includes a data bus 11. An example of such a bus 11 is a DALI (Digital Addressable Lighting Interface) bus for implementing the DALI protocol for controlling lighting equipment. The respective control lines 9, 9 X of the street lamps 1, 1 x are connected to the data bus 11, so that the light distribution or the brightness of the illumination system 10 can be controlled centrally by a control unit 14, for example. The control can be performed by any unit connected to the data bus 11.
Dazu werden von der Steuereinheit externe Dimmbefehle, die von jeder Straßenlaterne des Systems umgesetzt werden, über den Datenbus 11 gesendet. Denkbar ist es auch, Dimmbefehle für nur einzelne adressierbare Straßenlaternen oder für Gruppen von adressierbaren Straßenlaternen zu senden . For this purpose, external dimming commands, which are implemented by each street lamp of the system, are sent via the data bus 11 by the control unit. It is also conceivable to send dimming commands for only individual addressable street lamps or for groups of addressable street lamps.
Im Beleuchtungssystem 10 kann auch mindestens ein Sensor 13 vorgesehen sein. Bei dem Sensor 13 kann es bspw. sich um einen Bewegungssensor, einen Tageslicht sensor, oder einen Regensensor handeln. Es kann auch ein Photosensor zur Erfassung von Alterungseffekten oderIn the illumination system 10, at least one sensor 13 may be provided. The sensor 13 may, for example, be a motion sensor, a daylight sensor, or a rain sensor. It can also be a photosensor for detecting aging effects or
Farbortverschiebungen der LEDs sein. Color shifts the LEDs be.
Entscheidend ist, dass der Sensor netzwerkfähig ist, und über den Datenbus 11 Messdaten zu einer bestimmten Eigenschaft der Umgebung des Beleuchtungssystems 10 sendet, wie die Temperatur, die Helligkeit oder eine Bewegung . Diese Messdaten werden von der zentralen Steuereinheit 14 verarbeitet, wobei diese dann wiederum entsprechende Dimm- Befehle über den Datenbus 11 aussenden kann. Vorzugsweise sind mehrere Sensoren 13 vorgesehen, so dass die ausgehende Steuereinheit 14 mehrere Messdaten zur Verfügung hat. Alternativ kann der Sensor 13 die Messdaten selbst in Dimm-Befehlen umwandeln und aussenden. Alternativ werden die Messdaten direkt von den einzelnen Straßenlaternen 1, 1 erfasst, ausgewertet, und in eine passende Steuerung der LED-Module 4, 5 umgewandelt. The decisive factor is that the sensor is network-capable, and transmits via the data bus 11 measurement data for a specific property of the environment of the illumination system 10, such as the temperature, the brightness or a movement. These measurement data are processed by the central control unit 14, which in turn can send out corresponding dimming commands via the data bus 11. Preferably, a plurality of sensors 13 are provided, so that the outgoing control unit 14 has several measurement data available. Alternatively, the sensor 13 may itself convert and transmit the measurement data in dimming commands. Alternatively, the measurement data are recorded directly from the individual street lamps 1, 1, evaluated, and converted into a suitable control of the LED modules 4, 5.
Fig. 3 zeigt eine schematische Darstellung eines erfindungsgemäßen Betriebsgeräts für LEDs bzw. einBetriebsgerät für wenigstens zwei LED-Kanäle. 3 shows a schematic representation of an operating device according to the invention for LEDs or an operating device for at least two LED channels.
Das Betriebsgerät 20 der Leuchte 2 umfasst eine Steuereinheit 21, eine erste Modul-Versorgungseinheit 24, eine zweite Modul-Versorgungseinheit 25, einen Speicher 22 und eine Gleichstromquelle 26. Das Betriebsgerät verfügt über zwei Eingänge, nämlich einen ersten Eingang 28 für die Stromversorgung über die Stromversorgungsleitung 8 und einen zweiten Eingang 29 zum Empfang von Daten, die über die Leitung 9 und den Datenbus 11 gesendet werden. Diese Daten sind vorzugsweise Steuer- bzw. Dimm-Befehle zur Steuerung der LEDs bzw. derer Helligkeit. Alternativ oder zusätzlich dazu kann das Betriebsgerät 20 auch andere Datenarten wie Messdaten ausgehend von einem Sensor 13 oder Kalibrierungsdaten empfangen. Gemäß weiteren Ausführungsformen ist das Betriebsgerät 20 derart ausgebildet, dass es auch selber Daten wie Bestätigungsdaten oder Zustandsdaten über die Leitung 9 in den Bus 11 sendet kann. Zentrale Einheit des Betriebsgeräts 20 ist die Steuereinheit, die die über den zweiten Eingang 29 empfangenen Daten verarbeitet und entsprechende Steuerungen der LED-Module 4, 5 vornimmt. Die Versorgung der LED-Module 4, 5 erfolgt über die entsprechende erste Modul-Versorgungseinheit 24 und über die zweite Modul- Versorgungseinheit 25. The operating device 20 of the luminaire 2 comprises a control unit 21, a first module supply unit 24, a second module supply unit 25, a memory 22 and a DC power source 26. The operating device has two inputs, namely a first input 28 for the power supply via the Power supply line 8 and a second input 29 for receiving data that are sent via the line 9 and the data bus 11. These data are preferably control or dimming commands for controlling the LEDs or their brightness. Alternatively or additionally, the operating device 20 may also receive other types of data, such as measurement data from a sensor 13 or calibration data. According to further embodiments, the operating device 20 is designed such that it can also send itself data such as confirmation data or status data via the line 9 in the bus 11. The central unit of the operating device 20 is the control unit, which processes the data received via the second input 29 and performs corresponding control of the LED modules 4, 5. The supply of the LED modules 4, 5 via the corresponding first module supply unit 24 and the second module supply unit 25th
Das Betriebsgerät 20 kann mehrere Kanäle unabhängig voneinander ansteuern. Jeder Kanal kann dabei ein LED- Modul ansteuern. Dabei kann es sich beispielsweise um LED Arrays mit blauen LEDs handeln, die mithilfe eines Farbkonversionsmittels weißes Licht ausstrahlen. Möglich ist auch, dass jeder Kanal eine unterschiedliche LED-Farbe ansteuert. Dabei soll vorweg darauf hingewiesen werden, dass das erfindungsgemäße Verfahren keineswegs auf zwei Kanäle beschränkt ist. Vielmehr ist es möglich, dass das Verfahren drei oder auch mehrere Kanäle einbezieht. Bei drei Kanälen ist es so z.B. denkbar, dass ein Kanal rote LEDs, ein Kanal grüne LEDs und ein Kanal blaue LEDs ansteuert . The operating device 20 can control several channels independently of each other. Each channel can control one LED module. These may be, for example, LED arrays with blue LEDs that emit white light using a color conversion agent. It is also possible that each channel drives a different LED color. It should be pointed out in advance that the inventive method is by no means limited to two channels. Rather, it is possible that the method involves three or more channels. For three channels it is e.g. It is conceivable that one channel controls red LEDs, one channel green LEDs and one channel blue LEDs.
Die Gleichstromquelle 26 wird im Betrieb über den ersten Eingang 28 vom Wechselstromnetz mit Wechselspannung versorgt. An ihrem Ausgang stellt die Gleichstromquelle 26 einen konstanten Gleichstrom 10 zur Verfügung. Die Gleichstromquelle 26 umfasst vorzugsweise einen Gleichrichter zum Gleichrichten der Netzspannung, einen Spannungswandler zum Herabsetzen der gleichgerichteten Netzspannung, und einen Konverter zum Generieren des Gleichstroms 10. The DC power source 26 is supplied in operation via the first input 28 from the AC mains with AC voltage. At its output, the DC power source 26 provides a constant DC current 10 available. The DC power source 26 preferably comprises a rectifier for rectifying the mains voltage, a voltage converter for reducing the rectified mains voltage, and a converter for generating the direct current 10.
Der Speicher 22 enthält Daten, die vorzugsweise zur Kalibrierung der Leuchte 2 dienen. Diese Daten können sich auf den Alterungsprozess der LEDs, auf einen nicht zu überschreitenden maximalen Helligkeitswert, oder beispielsweise auf eine gewünschte Anpassung der Farbtemperatur des erzeugten Lichts beziehen. Vorzugsweise beziehen sich derartige Daten auf einen der LED-Module 4, 5, oder auf alle LED-Module des Leuchte. Die Daten können werksseitig vorab in den Speicher 22 gespeichert werden. Die Daten können aber auch im Betrieb über die Leitung 9 von der Steuereinheit 21 in den Speicher 22 gespeichert werden. The memory 22 contains data which are preferably used to calibrate the luminaire 2. This data can be up refer to the aging process of the LEDs, to a maximum brightness value not to be exceeded, or, for example, to a desired adjustment of the color temperature of the generated light. Preferably, such data relate to one of the LED modules 4, 5, or to all the LED modules of the luminaire. The data can be stored in the memory 22 in the factory in advance. However, the data can also be stored in operation via the line 9 from the control unit 21 in the memory 22.
Erfindungsgemäß ist nunmehr die Steuereinheit 21 in der Lage, entweder die im Speicher 22 abgespeicherten Kalibrierungsdaten abzulesen, oder auch Kalibrierungsdaten über die Leitung 9 und den Bus 11 zu empfangen. Die Steuereinheit 21 berechnet entsprechend denAccording to the invention, the control unit 21 is now able either to read the calibration data stored in the memory 22 or also to receive calibration data via the line 9 and the bus 11. The control unit 21 calculates accordingly
Kalibrierungsdaten die Höhe des Stroms, mit dem das LED- Modul versorgt wird. In Fig. 4 ist eine Darstellung des zeitlichen Verlaufs der Amplitude des Versorgungsstroms für die LED-Module 4, 5. gezeigt. In diesem Ausführungsbeispiel entspricht die Amplitude 10,4 des pulsmodulierten Stroms 14 für das erste LED-Modul 4 der Amplitude des von der Gleichstromquelle 26 zur Verfügung gestellten Gleichstroms 10. Das heißt, dass das erste LED-Modul 4 nicht kalibriert werden soll, bzw. dass seine maximale Helligkeit nicht reduziert werden muss . Die maximale Amplitude 10,5 des pulsmodulierten Stroms 15 für das zweite LED-Modul 5 ist dagegen kleiner als der Nenn-Gleichstrom 10. Demnach werden die LEDs 23 des zweiten LED-Moduls 5 unter gleichen Dimm-Bedingungen ein dunkleres Lichts generieren als die vom ersten LED-Modul 4. Calibration Data is the amount of current supplied to the LED module. FIG. 4 shows an illustration of the time profile of the amplitude of the supply current for the LED modules 4, 5. In this exemplary embodiment, the amplitude 10.4 of the pulse-modulated current 14 for the first LED module 4 corresponds to the amplitude of the direct current 10 provided by the DC power source 26. That is to say, the first LED module 4 is not to be calibrated, or that its maximum brightness does not have to be reduced. On the other hand, the maximum amplitude 10.5 of the pulse-modulated current 15 for the second LED module 5 is smaller than the rated direct current 10. Accordingly, the LEDs 23 of the second LED module 5 become in the same dimming conditions generate darker light than that of the first LED module 4.
Erfindungsgemäß ermittelt die Steuereinheit 21 aus den empfangenen Dimm-Befehlen den entsprechenden Arbeitszyklus bzw. das Tastverhältnis T1/T0=T1/ (T1+T2 ) , wobei Tl die Zeitdauer der Versorgung mit einem Strom ungleich null, T2 die Ausschaltzeitdauer, und T0=(T1+T2) dieAccording to the invention, the control unit 21 determines from the received dimming commands the corresponding duty cycle T1 / T0 = T1 / (T1 + T2), where T1 is the time of supply with a non-zero current, T2 the turn-off time, and T0 = ( T1 + T2) the
Periodenzeitdauer darstellen. Represent period duration.
Insgesamt wird also die erste Modul-Versorgungseinheit 24 wird von dem Gleichstrom 10 versorgt und von der Steuereinheit 21 gesteuert. Die Modul-Versorgungseinheit 24 erhält von der Steuereinheit 21 Informationen bezüglich der maximalen Amplitude 10,4 des pulsmodulierten Stroms 14, und erzeugt entsprechend einen in Fig. 5 gezeigten pulsmodulierten Strom 14, der eine maximale Amplitude 10,4 und ein Tastverhältnis T1/T0 aufweist. Das LED-Modul 4 wird von diesem Strom 14 betrieben, und besteht aus einer Mehrzahl von LEDs 23, die durch Parallel- und/oder Serienschaltung zusammengefasst sind. Overall, therefore, the first module supply unit 24 is supplied by the direct current 10 and controlled by the control unit 21. The module supply unit 24 receives from the control unit 21 information regarding the maximum amplitude 10.4 of the pulse-modulated current 14, and accordingly generates a pulse-modulated current 14, shown in FIG. 5, having a maximum amplitude 10.4 and a duty cycle T1 / T0 , The LED module 4 is operated by this current 14, and consists of a plurality of LEDs 23, which are combined by parallel and / or series connection.
Der Aufbau und die Funktionsweise der zweiten Modul- Versorgungseinheit 25 und des zweiten LED-Moduls 5 sind ähnlich wie die der ersten Modul- Versorgungseinheit 24 und des ersten LED-Moduls 4. The structure and operation of the second module supply unit 25 and the second LED module 5 are similar to those of the first module supply unit 24 and the first LED module 4th
In Fig. 6 wird eine weitere Ausführungsform der Erfindung bzw. eine Darstellung des zeitlichen Verlaufs der Modulation des Versorgungsstroms 14, 15 für die LED-Module 4, 5 gezeigt. Die zwei LED-Module 4, 5 bzw. die zwei Kanäle sind bei dieser Ausführungsform jeweils mit einem Tastverhältnis von 30% PWM-betrieben sind. Weiterhin wird wie in der vorigen Ausführungsform die maximale Amplitude des pulsmodulierten Stroms I4X, 15 der zwei Kanäle entsprechend einer Kalibrierung auf die Werte 10,4, 10,5 festgesetzt . FIG. 6 shows a further embodiment of the invention or a representation of the time profile of the modulation of the supply current 14, 15 for the LED modules 4, 5. The two LED modules 4, 5 and the two channels are PWM-operated in this embodiment, each with a duty cycle of 30%. Continue As in the previous embodiment, the maximum amplitude of the pulse modulated current I4 X , 15 of the two channels is set to the values 10.4, 10.5 according to a calibration.
Die PWM-Pulse der beiden Kanäle sind so zeitlich aufeinander abgestimmt, dass ein PWM-Puls des ersten Kanals in der PWM-Ausschalt Zeitdauer des zweiten Kanals liegt. Dies bedeutet, dass die eine oder mehrere am ersten Kanal angeschlossenen bzw. von diesem angesteuerten LEDs dann leuchten, wenn die eine oder mehrere LEDs des zweiten Kanals ausgeschaltet sind. The PWM pulses of the two channels are timed to each other such that a PWM pulse of the first channel is in the PWM off period of the second channel. This means that the one or more LEDs connected to or driven by the first channel will light up when the one or more LEDs of the second channel are turned off.
Ein PWM-Puls des ersten Kanals liegt vorzugsweise in der Mitte der PWM-AusschaltZeitdauer des zweiten Kanals. Alternativ dazu, kann die positive Flanke eines PWM-Pulses des ersten Kanals mit der negativen Flanke eines PWM- Pulses des zweiten Kanals zeitlich übereinstimmen. In der Ausführungsform der Fig. 5 wird während 70% der Zeit kein Licht H erzeugt. Dagegen wird in der Ausführungsform der Fig. 6 nunmehr nur während 40% der Zeit keine Beleuchtung H generiert. Die Ausschaltzeiten der Gesamtbeleuchtung sind von 70% auf 40% der PWM- Periodendauer reduziert. Die PWM-Pulse der zwei Kanäle sind zeitlich so aufeinander abgestimmt, dass ein PWM-Puls des ersten Kanals möglichst in der PWM-AusschaltZeitdauer des zweiten Kanals liegt. Wie in Fig. 7 und 8 gezeigt, wird mit einem erfindungsgemäßen Verfahren bzw. mit einem erfindungsgemäßen Betriebsgerät also gewährleistet, dass bspw. die LED-basierte Straßenlaterne 1 derart herstellerseitig für lokale Vorschriften vorkonfiguriert wird, dass ein Betrieb im Bereich von 100%-Dimmen tatsächlich einem 100% Tastverhältnis von sämtlichen LED- Modulen 4, 5 entspricht. Fig. 7 und 8 beziehen sich auf das Betreiben der LED- Module 4, 5, wobei die langfristige Kalibrierung der Leuchte 2 es erfordert, dass die maximal generierte Helligkeit der Laterne 1 bzw. der Leuchte 2 dauerhaft bei 80% der tatsächlich mit der Leuchte erreichbaren Helligkeit liegt. A PWM pulse of the first channel is preferably in the middle of the PWM off period of the second channel. Alternatively, the positive edge of a PWM pulse of the first channel may coincide in time with the negative edge of a PWM pulse of the second channel. In the embodiment of FIG. 5, no light H is generated during 70% of the time. By contrast, in the embodiment of FIG. 6, illumination H is now generated only during 40% of the time. The switch-off times of the total lighting are reduced from 70% to 40% of the PWM period. The PWM pulses of the two channels are timed to each other so that a PWM pulse of the first channel is possible in the PWM AusschaltZeitdauer the second channel. As shown in FIGS. 7 and 8, it is thus ensured with a method according to the invention or with an operating device according to the invention that, for example, the LED-based street lamp 1 is preconfigured by the manufacturer for local regulations is that operation in the range of 100% dimming actually corresponds to a 100% duty cycle of all LED modules 4, 5. 7 and 8 relate to the operation of the LED modules 4, 5, wherein the long-term calibration of the lamp 2 requires that the maximum generated brightness of the lantern 1 and the lamp 2 permanently at 80% of the actual with the lamp achievable brightness is.
Im Beispiel der Fig. 7 erfolgt die langfristige Kalibrierung gemäß dem Stand der Technik dadurch, dass das Tastverhältnis des PWM-Stroms bei Tl/T0=80% liegt. In Fig. 8 dagegen bleibt das Tastverhältnis bei 100%, und die maximale Amplitude des PWM-Stroms wird auf 80% des Nennstroms 10 gesenkt. In the example of FIG. 7, the long-term calibration according to the prior art takes place in that the duty cycle of the PWM current is Tl / T0 = 80%. In Fig. 8, on the other hand, the duty ratio remains at 100%, and the maximum amplitude of the PWM current is lowered to 80% of the rated current 10.
Die Anpassung an die lokalen Verhältnisse wird erfindungsgemäß durch reines Amplitudendimmen erreicht. Somit wird erfindungsgemäß der Effekt erzielt, dass bei 100% Dimm-Betrieb optimale Lichtqualität im Sinne von 100% Tastverhältnis vorliegt. Somit werden im niedrigen Dimm-Bereich negative Effekte wie Flackern oder Stroboskopeffekte abgemildert, da in solch einem niedrigen Dimm-Bereich das Tastverhältnis gemäß der Erfindung größer als das Tastverhältnis gemäß dem Stand der Technik ist. The adaptation to the local conditions is achieved according to the invention by pure amplitude dimming. Thus, according to the invention, the effect is achieved that at 100% dimming operation optimum light quality in terms of 100% duty cycle is present. Thus, in the low dimming range, negative effects such as flickering or stroboscopic effects are alleviated because in such a low dimming range the duty cycle according to the invention is greater than the duty cycle of the prior art.
Gemäß dem Stand der Technik tritt also bzw. im Gebiet der Straßenlaternen das Problem auf, dass bei Auslieferung von derartigen LED-Laternen typischerweise eine der beiden LED-Ketten auf einen maximalen Betrieb begrenzt ist, der unterhalb des maximal möglichen 100%-Tastverhältnis liegt. Dagegen steht erfindungsgemäß die volle Spanne des PWM- Dimmens zur Verfügung, da herstellerseitig nicht bereits eine Begrenzung des Tastverhältnisses vorliegt. According to the state of the art, the problem arises in the field of street lights that when such LED lanterns are delivered, typically one of the two LED chains is limited to maximum operation below the maximum possible 100% duty cycle. On the other hand, according to the invention, the full range of PWM dimming is available since the manufacturer does not already limit the duty cycle.
Ein weiterer Vorteil ist, dass nunmehr die zwei oder gar mehreren LED-Kanäle bzw. LED-Module 4, 5 einer einzigen Leuchte 2 nicht mehr mit unterschiedlichen PWM-Werten angesteuert werden müssen, um möglicherweise eine unterschiedliche Kalibrierung vornehmen zu können, sondern als ein einziger Ansteuerkanal behandelt werden können. Diese wird dadurch ermöglicht, dass nunmehr ausgehend von den ggf. unterschiedlich eingestellten Amplitudenwerten 10,4, 10,5 die PWM-Tastverhältnisse gleichlaufend für sämtliche Kanäle verändert werden. Somit kann beispielsweise mit einem einzigen DALI-Befehl das gleichlaufende Dimmen von mehreren Kanälen der gleichen Leuchte erzielt werden. Gemäß der Erfindung werden also eingehende Dimm-Befehle immer nur in einer Veränderung des Tastverhältnisses (PWM- Dimmen) umgesetzt, obwohl die Ansteuerschaltung wenigstens zwei LED-Modulketten sowohl durch Amplitudendimmen wie auch durch PWM-Dimmen ansteuern kann. Another advantage is that now the two or even more LED channels or LED modules 4, 5 of a single lamp 2 need not be controlled with different PWM values to possibly make a different calibration can, but as a single control channel can be treated. This is made possible by the fact that, starting now from the possibly differently set amplitude values 10.4, 10.5, the PWM duty cycles are changed simultaneously for all channels. Thus, for example, with a single DALI command the concurrent dimming of multiple channels of the same luminaire can be achieved. Thus, according to the invention, incoming dimming commands are always converted only in one change of the duty cycle (PWM dimming), although the drive circuit can drive at least two LED module strings both by amplitude dimming and by PWM dimming.
Das PWM-Dimmen zwischen 0 und 100% Tastverhältnis ist für die Umsetzung von eingehenden Dimm-Befehlen reserviert. Alle weiteren Anpassungseffekte (Alterungsausgleich, Einstellen auf lokale Vorschriften, etc.) wird durch das Amplitudendimmen erreicht. Insbesondere hinsichtlich des Ausgleichs von Alterungseffekten der LEDs kann vorgesehen sein, dass sämtliche LED-Modulketten im ausgelieferten Zustand zuerst mit einem Amplitudenwert unter 100% Nennwert 10 des Stroms betrieben werden, um eine ausreichende Marge zur Kompensation von Alterungseffekten zu haben. The PWM dimming between 0 and 100% duty cycle is reserved for the conversion of incoming dimming commands. All other adaptation effects (aging compensation, adjustment to local regulations, etc.) are achieved by amplitude dimming. In particular with regard to the compensation of aging effects of the LEDs, it can be provided that all LED module chains in the delivered state are first operated with an amplitude value below 100% nominal value 10 of the current, in order to achieve a sufficient margin to compensate for aging effects.
Die beiden unterschiedlichen von dem Steuergerät angesteuerten LED-Kanäle können jeweils die gleiche Farbe, insbesondere Weiß, sein. Es können indessen auch unterschiedliche Farben sein, so dass eineThe two different LED channels controlled by the control unit can each be the same color, in particular white. However, it can also be different colors, so that one
Farbortkompensation über Amplitudendimmen erfolgt, während das eigentliche Dimmen im Sinne von Umsetzen von externen Dimm-Befehlen über PWM-Dimmen, ausgehend von einem Tastverhältnis von 100% erfolgt. Color compensation by means of amplitude dimming takes place while the actual dimming in the sense of converting from external dimming commands via PWM dimming is based on a duty cycle of 100%.
Bezugszeichenliste : List of reference numbers:
1 Straßenlaterne 1 street lamp
2 Leuchte  2 light
3 Laternenmast  3 lamppost
4 erstes LED-Modul  4 first LED module
5 zweites LED-Modul  5 second LED module
6 erster beleuchteter Bereich  6 first illuminated area
7 zweiter beleuchteter Bereich  7 second illuminated area
8 Stromversorgungsleitung  8 power supply line
9 Steuerleitung  9 control line
10 BeleuchtungsSystem  10 lighting system
11 Bus  11 bus
12 Boden  12 floor
13 Sensor  13 sensor
14 zentrale Steuereinheit  14 central control unit
20 Betriebsgerät  20 operating device
21 Steuereinheit  21 control unit
22 Speicher  22 memory
23 LED  23 LED
24 erste Modul-Versorgungseinheit  24 first module supply unit
25 zweite Modul-Versorgungseinheit  25 second module supply unit
26 Gleichstromquelle  26 DC power source
28 erster Eingang des Betriebsgeräts (Versorgung 28 first input of the operating device (supply
29 erster Eingang des Betriebsgeräts ( Steuerung) 29 first input of the operating device (control)

Claims

Patentansprüche : Claims:
1. Verfahren zum Betreiben wenigstens eines Leuchtmittels, insbesondere einer Leuchtdiode (LED) (23) eines LED-ModulsMethod for operating at least one light-emitting means, in particular a light-emitting diode (LED) (23) of an LED module
(4, 5), (4, 5),
bei dem die Leuchtdiode (23) von einem pulsmodulierten Strom (14, 15) betrieben wird, in which the light-emitting diode (23) is operated by a pulse-modulated current (14, 15),
wobei externen Dimmbefehle in eine Veränderung eines leistungsbestimmenden Parameters der Pulsmodulation, wie bspw. das Tastverhältnis, umgesetzt werden, und wherein external dimming commands are converted into a change of a power-determining parameter of the pulse modulation, such as the duty cycle, and
eine längerfristige Kalibrierung oder Kompensation der Lichtleistung der LED nur durch eine Veränderung der Amplitude des pulsmodulierten Stroms erfolgt. a longer-term calibration or compensation of the light output of the LED is effected only by a change in the amplitude of the pulse-modulated current.
2. Verfahren zum Dimmen wenigstens einer LED, 2. Method for dimming at least one LED,
wobei der Dimmbereich in wenigstens zwei Unterbereiche unterteilt ist, in denen das Dimmen in unterschiedlicher Weise ausgewählt aus der Veränderung der Amplitude oder eines Parameters einer Pulsmodulation des Strom durch die LED(s) oder einer Kombination davon ausgeführt wird, wobei wherein the dimming area is subdivided into at least two subregions in which the dimming is performed differently from the variation of the amplitude or a parameter of a pulse modulation of the current through the LED (s) or a combination thereof
- in einem ersten Bereich, der zwischen einem festen oder einstellbaren Dimm-Schwellenwert und 100% Dimmwert liegt, ein Dimmen durch Veränderung der Stromamplitude erfolgt, und  in a first range lying between a fixed or adjustable dimming threshold and 100% dimming value, dimming is effected by changing the current amplitude, and
erst in einem zweiten Bereich unterhalb des Dimm- Schwellenwerts eine Veränderung des Pulsmodulations- Parameters, insbesondere eine Verringerung des Tastverhältnisses, ggf- in Kombination mit einer Veränderung der Stromamplitude erfolgt.  Only in a second range below the dimming threshold value is a change in the pulse modulation parameter, in particular a reduction in the duty cycle, possibly in combination with a change in the current amplitude.
3. Verfahren nach Anspruch 2, wobei der erste Bereich der Amplitudendimmung unmittelbar anschliessend an einen Dimmwert von 100% reserviert ist zur Kompensation oder Kalibrierung hinsichtlich Effekten, die bezüglich der Frequenz von Dimmbefehlen langfristig sind. 3. The method according to claim 2, wherein the first range of amplitude dimming immediately after a dimming value of 100% is reserved for compensation or calibration for effects that are long term in the frequency of dimming commands.
4. Verfahren nach Anspruch 1 oder 2, 4. The method according to claim 1 or 2,
wobei die Veränderung des Pulsmodulationsparameters abhängig von extern von einem Sensor (13) erfassten Messdaten gesteuert wird. wherein the change in the pulse modulation parameter is controlled as a function of measurement data acquired externally by a sensor (13).
5. Verfahren nach einem der vorigen Ansprüche, 5. The method according to any one of the preceding claims,
wobei die Amplitude (10,4, 10,5) des pulsmodulierten Stroms (14, 15) abhängig von einer Kalibrierung oder Kompensation eingestellt wird, die im Vergleich zur der Frequenz von Dimmbefehlen langfristig ist. wherein the amplitude (10, 4, 10, 5) of the pulse modulated current (14, 15) is adjusted in response to a calibration or compensation that is long term compared to the frequency of dimming commands.
6. Verfahren nach einem der vorherigen Ansprüche, 6. The method according to any one of the preceding claims,
wobei die Amplitude (10,4, 10,5) des pulsmodulierten Stroms (14, 15) zum Einstellen einer maximalen Helligkeit, zum Ausgleich der Alterung der LED (23) oder zur Änderung der Farbtemperatur des von der LED (23) erzeugten Lichts einstellbar ist. wherein the amplitude (10,4, 10,5) of the pulse modulated current (14, 15) for adjusting a maximum brightness, to compensate for the aging of the LED (23) or to change the color temperature of the light generated by the LED (23) adjustable is.
7. Verfahren nach einem der vorigen Ansprüche, 7. The method according to any one of the preceding claims,
wobei LEDs (23) von mehreren LED-Modulen (4, 5) betrieben werden . wherein LEDs (23) of several LED modules (4, 5) are operated.
8. Verfahren nach Anspruch 7, 8. The method according to claim 7,
wobei jedes LED-Modul (4, 5) mit einem pulsmodulierten Strom (14, 15) versorgt wird, wobei die Amplitude (10,4, 10,5) des pulsmodulierten Stroms (14, 15) individuell für jedes LED-Modul (4, 5) einstellbar ist. wherein each LED module (4, 5) is supplied with a pulse modulated current (14, 15), wherein the amplitude (10, 4, 10, 5) of the pulse modulated current (14, 15) is determined individually for each LED module (4 , 5) is adjustable.
9. Verfahren nach Anspruch 7 oder 8, 9. The method according to claim 7 or 8,
wobei die verschiedenen pulsmodulierten Ströme (14, 15) zum Betreiben der einzelnen LED-Module (4, 5) derart moduliert sind, dass sie gleichzeitig auf den Null-Wert gesetzt werden. wherein the different pulse modulated currents (14, 15) for operating the individual LED modules (4, 5) are modulated to be simultaneously set to the zero value.
10. Verfahren nach Anspruch 7 oder 8, 10. The method according to claim 7 or 8,
wobei die positive Flanke des pulsmodulierten Stroms (14) zum Betreiben von einem der LED-Module (4) mit der positiven Flanke des pulsmodulierten Stroms (15) zum Betreiben von einem anderen der LED-Module (5) zeitlich versetzt ist. wherein the positive edge of the pulse modulated current (14) for operating one of the LED modules (4) is offset in time from the positive edge of the pulse modulated current (15) for operating another one of the LED modules (5).
11. Verfahren nach einem der vorigen Ansprüche, 11. The method according to any one of the preceding claims,
wobei mindestens zwei LED-Module (4, 5) derart betrieben werden, dass ein einziger Dimm-Befehl das gleichlaufende Bimmen von den mindestens zwei LED-Modulen (4, 5) zur Folge hat. wherein at least two LED modules (4, 5) are operated such that a single dimming command has the concurrent Bimmen from the at least two LED modules (4, 5) result.
12. Verfahren zum Betrieb von wenigstens zwei getrennt ansteuerbaren LED-Modulen, die jeweils wenigstens eine LED aufweisen, 12. Method for operating at least two separately controllable LED modules, each having at least one LED,
wobei die Stromamplitude von wenigstens zwei LED-Modulen unterschiedliche, vorzugsweise über einen Dimmzeitraum konstante Werte ist, und wherein the current amplitude of at least two LED modules is different, preferably constant over a dimming period, and
interne oder externe Dimmbefehle in eine für die beiden LED-Module gleichlaufende Veränderung eines leistungsbestimmenden Parameters, insbesondere des Tastverhätnisses, einer Pulsbreitenmodulation des Stroms durch die LED-Module ungesetzt werden. internal or external dimming commands in one for the two LED modules concurrent change of a power-determining parameter, in particular the Tastverhätnisses, a pulse width modulation of the current are set by the LED modules.
13. Integrierte Steuereinheit, insbesondere ASIC, Mikrokontroller oder Hybrid daraus, die zur Durchführung eines Verfahrens nach einem der vorhergehenden Ansprüche ausgelegt ist. 13. Integrated control unit, in particular ASIC, microcontroller or hybrid thereof, for the implementation a method according to any one of the preceding claims.
14. LED-Leuchte, insbesondere LED-Strassenbeleuchtung, aufweisend eine Steuereinheit nach Anspruch 10. 14. LED light, in particular LED street lighting, comprising a control unit according to claim 10.
15. LED-Leuchte mit wenigstens zwei getrennt ansteuerbaren LED-Modulen, die jeweils wenigstens eine LED aufweisen, aufweisend eine Steuereinheit zum gesteuerten oder geregelten Betrieb der LED-Module, wobei die Steuereinheit dazu ausgelegt ist, die Stromamplitude von wenigstens zwei LED-Modulen auf unterschiedliche, vorzugsweise über einen Dimmzeitraum konstante Werte einzustellen, und 15. LED lamp with at least two separately controllable LED modules, each having at least one LED, comprising a control unit for the controlled or regulated operation of the LED modules, wherein the control unit is adapted to the current amplitude of at least two LED modules set different, preferably over a dimming period constant values, and
Interne oder externe Dimmbefehle in eine für die beiden LED-Module gleichlaufende Veränderung eines leistungsbestimmenden Parameters, insbesondere des Tastverhältnisses, einer Pulsbreitenmodulation des Stroms durch die LED-Module umzusetzen. Internal or external dimming commands to implement in one for the two LED modules concurrent change of a power-determining parameter, in particular the duty cycle, a pulse width modulation of the current through the LED modules.
16. Betriebsgerät (20) zum Betreiben wenigstens eines Leuchtmittels, insbesondere einer Leuchtdiode (LED) (23) eines LED-Moduls (4, 5), aufweisend 16. operating device (20) for operating at least one light-emitting means, in particular a light-emitting diode (LED) (23) of an LED module (4, 5), comprising
einen Versorgungseingang (28) zur Versorgung des Betriebsgeräts (20) mit elektrischer Energie,  a supply input (28) for supplying the operating device (20) with electrical energy,
- einen Dateneingang (29) zum Empfang von Steuer- bzw. Dimm-Befehlen,  a data input (29) for receiving control or dimming commands,
- mindestens einen Ausgang zur Versorgung eines LED-Moduls (4, 5),  at least one output for supplying an LED module (4, 5),
- mindestens eine LED-Modul-Versorgungseinheit (24, 25) zur Versorgung des LED-Moduls (4, 5) mit einem pulsmodulierten Strom (14, 15), und - At least one LED module supply unit (24, 25) for supplying the LED module (4, 5) with a pulse modulated current (14, 15), and
- eine Steuereinheit zur Bestimmung der Ausschalt Zeitdauer (T2) des pulsmodulierten Stroms (14, 15) abhängig von einem externen Dimm-Befehl, und zur Bestimmung der Amplitude (10,4, 10,5) des pulsmodulierten Stroms abhängig von einer Kalibrierung oder Kompensation. a control unit for determining the switch-off time duration (T2) of the pulse-modulated current (14, 15) as a function of an external dimming command, and to determine the amplitude (10,4, 10,5) of the pulse modulated current depending on a calibration or compensation.
17. Betriebsgerät zum dimmbaren Betrieb von LEDs, aufweisend eine Steuereinheit, die den Dimmbereich in wenigstens zwei Unterbereiche unterteilt ist, in denen das Dimmen in unterschiedlicher Weise ausgewählt aus der Veränderung der Amplitude oder eines Parameters einer Pulsmodulation des Strom durch die LED(s) oder einer Kombination davon ausgeführt wird, 17. Operating device for the dimmable operation of LEDs, comprising a control unit which divides the dimming area into at least two sub-areas, in which the dimming in different ways selected from the change of the amplitude or a parameter of a pulse modulation of the current through the LED (s) or a combination of which is carried out
wobei in which
- die Steuereinheit in einem ersten Bereich, der zwischen einem festen oder einstellbaren Dimm-Schwellenwert und 100% Dimmwert liegt, ein Dimmen durch Veränderung der Stromamplitude ausführt, und  in a first range between a fixed or adjustable dimming threshold and 100% dimming value, the control unit performs dimming by varying the current amplitude, and
die Steuereinheit erst in einem zweiten Bereich unterhalb des Dimm-Schwellenwerts eine Veränderung des Pulsmodulations-Parameters , insbesondere eine Verringerung des Tastverhältnisses, ggf. in Kombination mit einer Veränderung der Stromamplitude ausführt.  the control unit performs a change in the pulse modulation parameter only in a second range below the dimming threshold value, in particular a reduction of the duty cycle, possibly in combination with a change in the current amplitude.
18. Betriebsgerät (20) nach Anspruch 14 oder 15, 18. operating device (20) according to claim 14 or 15,
weiterhin aufweisend eine Gleichstromquelle (26) zur Bereitstellung eines konstanten Gleichstroms (10) ausgehend von einer am Versorgungseingang (28) zur Verfügung gestellten Netzspannung. further comprising a DC power source (26) for providing a constant DC current (10) from a supply voltage (28) provided at the mains supply.
19. Betriebsgerät (20) nach einem der Ansprüche 12 bis 14, weiterhin aufweisend einen Speicher (22) zur Speicherung von Kalibrierungsdaten. 19. Operating device (20) according to any one of claims 12 to 14, further comprising a memory (22) for storing calibration data.
20. LED-Leuchte, insbesondere LED-Strassenlaterne, aufweisend ein Betriebsgerät nach Anspruch 18. 20. LED light, in particular LED street lamp, comprising an operating device according to claim 18.
EP11700393.9A 2010-01-05 2011-01-05 Combined method for operating an electric illuminant and operating circuit Active EP2522199B1 (en)

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DE112011100189A5 (en) 2012-10-18
EP2522199B1 (en) 2018-03-14
DE102010000672A1 (en) 2011-07-07
WO2011083117A2 (en) 2011-07-14
WO2011083117A3 (en) 2012-05-03

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