ARRANGEMENT WITH A LIGHTING CONTROL DEVICE

Description

[0001] The invention relates to an arrangement comprising a control gear for light sources and an electrical circuit, the voltage supply of which is galvanically isolated from an energy transmission element of the control gear.

[0002] For the operation of light sources such as light-emitting diodes (LEDs) or fluorescent lamps, control gear, also called ballasts, is used. The control gear is designed to generate the required supply voltage for the light source from the mains supply voltage while simultaneously meeting safety requirements. Additional electrical circuits are used in conjunction with the control gear and the light source.

[0003] Such additional electrical circuits can include sensors such as motion sensors or light sensors. The operation of these sensors requires a supply voltage to power them. The sensors can, for example, be used to measure physical parameters and transmit these parameters as an electrical signal to the control gear.

[0004] To supply power to a sensor, appropriate leads and often additional circuitry for control and external communication are required. Typically, a converter integrated into the control gear generates the necessary low-voltage supply voltage, which is then fed to the sensor via supply lines. However, generating this low-voltage supply voltage entails additional complexity within the converter, requiring additional external connection options such as connectors and additional supply lines between the converter and sensor, as well as additional lines for transmitting the sensor signal to the control gear. Furthermore, the inductances of the control gear, particularly its transformer, are usually wrapped in copper foil to control unavoidable stray fields.The stray power thus introduced into the sequence remains unused. US 2012 212 150 A1, US 2009 284 179 A1, US 2007 236 159 A1, US 2009 159 677 A1, WO 2008 012 702 A1, and FR 2 955 011 A1 relate to arrangements according to the preamble of the accompanying claim 1. WO 2012 / 049582 A1 relates to the field of energy transmission technology using an inductive wireless energy transmission system.

[0005] Starting from the state of the art described at the beginning, the invention addresses the technical problem of improving the use of external circuits and control gear for light sources in a close spatial arrangement and improving the overall efficiency by utilizing the energy contained in the stray power.

[0006] This problem is solved according to the invention by the features of the arrangement according to independent claim 1. Advantageous embodiments of the invention are defined in the dependent claims.

[0007] The problem is solved by an arrangement according to independent claim 1, in particular comprising a control gear for light sources and an electrical circuit, wherein the control gear comprises at least one energy transfer element. According to the invention, an inductive coupling element of the electrical circuit is arranged in a magnetic or electromagnetic stray field of the energy transfer element. For example, the energy transfer element is designed as an inductive element.

[0008] The arrangement according to the invention provides a power supply for an electrical circuit located externally to the control gear, without requiring any additional wiring for supplying power from the control gear to the circuit. The invention reduces the effort required for connections such as connectors, mechanical feedthroughs through the control gear housing, cables, and cable guides. This enables contactless power transfer to the electrical circuit.

[0009] At the same time, it makes it possible to design a low-voltage circuit for the electrical circuitry and an input-side mains voltage section of the operating device with galvanic isolation. This allows requirements regarding protection against high voltages to be met easily and without additional effort.

[0010] Utilizing the stray field of an inductor in the operating device, which is already present for tasks other than supplying power to the circuit, reduces the complexity by eliminating the need for additional components in the operating device, such as a converter, thus reducing the number of components and the required device dimensions. In particular, a mains input choke, a primary winding of an isolation transformer, a coil of a flyback converter, etc., can serve as the inductive element of the operating device whose stray field is utilized according to the invention. Furthermore, by absorbing the stray power, the use of the foil that normally surrounds the inductor can be eliminated.

[0011] According to an advantageous further development of the arrangement according to the invention, the electrical circuit comprises a voltage supply means set up to generate a supply voltage for the electrical circuit from absorbed energy of the magnetic or electromagnetic stray field.

[0012] The magnetic coupling element extracts energy from the magnetic or electromagnetic stray field, an alternating field, by induction in a conductor of the coupling element and provides this energy in the form of an alternating current (alternating voltage). Using the power supply, this induced alternating current can be rectified and used as a low-voltage supply voltage, for example, for a sensor.

[0013] According to a preferred embodiment of the arrangement according to the invention, the electrical circuit has a storage means, in particular a capacitor, for storing electrical energy.

[0014] The storage medium can provide an approximately constant low-voltage DC voltage for operating, for example, a control circuit, a microcontroller, or an application-specific integrated circuit (ASIC). By using a suitable capacitor as the storage medium, it is also possible to ensure continuous operation of the circuit even for pulsed operation of the operating device.

[0015] According to a further embodiment, the arrangement is characterized in that the electrical circuit comprises a sensor, in particular a motion sensor or brightness sensor, and / or a communication interface, preferably for wireless communication, and the energy transmission element is controlled in pulsed operation. The field energy absorbed via the magnetic coupling element is temporarily stored in the storage medium and is also available for a motion sensor used to activate a light source.

[0016] Another embodiment of the arrangement comprises an electrical circuit with a first communication means designed for communication with the operating device.

[0017] The first communication means of the electrical circuit transmits a signal, in particular a sensor signal or data signal, from the electrical circuit to the control gear. This allows a communication channel between the control gear and the electrical circuit to be implemented with minimal effort.

[0018] The first communication means of a preferred embodiment of the arrangement according to the invention preferably has a modulator designed for clocking the inductive coupling element and / or a transmitting inductance.

[0019] According to an advantageous further development of the arrangement according to the invention, the first communication means communicates with the operating device by changing a load of the inductive coupling element.

[0020] If the first means of communication is designed in this way, special signal lines between the electrical circuit and the operating device are not required, and the circuit engineering effort for the power supply as well as for signaling and / or data communication is low.

[0021] The arrangement according to a further embodiment shows the operating device with a second communication means designed to communicate with the first communication means of the electrical circuit.

[0022] According to a further development, the operating device is characterized by the fact that it comprises a housing and a housing cover, with the electrical circuit being arranged outside the housing or on the housing of the operating device.

[0023] In one embodiment of the inventive arrangement, the inductive coupling element of the electrical circuit is arranged on the housing cover or integrated into the housing cover.

[0024] Supplying the electrical circuit via magnetic coupling allows the circuit to be located outside the control gear housing. This makes it easy to extend and / or modify the functionality of the control gear by adding a suitably designed electrical circuit, as well as to repair and / or replace it. The actual control gear can remain unchanged.

[0025] The housing cover of an advantageous embodiment has at least one marking to indicate a position of the inductive coupling element on the housing cover.

[0026] The marking enables precise positioning of the magnetic coupling element relative to the energy transfer element. Even when the electrical circuit is subsequently attached to the housing cover, optimal positioning of the magnetic coupling element and energy transfer element, and thus maximum energy extraction from the magnetic or electromagnetic stray field, can be achieved.

[0027] An arrangement according to one embodiment is characterized in that the inductive coupling element, together with the inductive element, exerts a magnetic force on the electrical circuit in the direction of the housing cover.

[0028] The use of magnetic force allows for improved adhesion of the electrical circuit to the housing cover, possibly in addition to fixing by screws, gluing, etc.

[0029] According to a preferred embodiment of the arrangement according to the invention, the inductive element is at least a part of an LLC transformer of the operating device and / or an inductor of a converter of the operating device.

[0030] The use of existing and technically necessary inductances of the control gear and its magnetic or electromagnetic stray field enables the power supply of external electrical circuits without additional effort on the part of the control gear.

[0031] The invention also relates to an arrangement comprising an LED module with a light source and an electrical circuit, wherein the operating device comprises at least one energy transfer element, preferably an inductive element, and wherein the electrical circuit has an inductive coupling element (which is arranged in a magnetic or electromagnetic stray field of the energy transfer element).

[0032] The electrical circuit may include a power supply device set up to generate a supply voltage for the electrical circuit from absorbed energy from the magnetic or electromagnetic stray field.

[0033] The electrical circuit can be designed to output and receive wireless signals, especially radio signals.

[0034] The invention is explained in more detail below with reference to exemplary embodiments and figures. These show... Fig. 1 a schematic representation of an arrangement according to the invention consisting of a control device and an electrical circuit, Fig. 2 views of an arrangement according to the invention consisting of a control device and an electrical circuit, Fig. 3 a schematic representation of an electrical circuit according to the invention of a first embodiment, Fig. 4 a schematic representation of an electrical circuit according to the invention of a second embodiment, and Fig. 4 a further embodiment according to the invention.

[0035] In the figures, identical reference symbols denote the same or corresponding elements. For the sake of clarity, repetition is largely omitted in the following description of advantageous embodiments.

[0036] In Figure 1An arrangement according to the invention is shown in a first embodiment of the invention. The arrangement comprises a control device 1 for operating a light source 2 and an electrical circuit 3. Figure 1 A light source 2 in the form of an LED is shown. Without deviating from the invention, it is equally possible for the control device 1 to supply several light sources 2, which in turn comprise a plurality of light-emitting elements such as LEDs, gas discharge lamps, etc.

[0037] The invention is explained using the example of an LLC converter for operating at least one light source, for example, an LED array. Driver circuits for operating light-emitting diodes are known. For example, converters with an LLC circuit are used as driver circuits, hereinafter referred to as LLC converters. In LLC converters, a (series) resonant circuit is fed with a high-frequency alternating voltage by means of a high-frequency clocked half-bridge circuit 5. The resonant circuit feeds a primary-side transformer coil. A secondary-side transformer coil then directly supplies a light source. The supply voltage supplied to the light source will typically be a DC voltage. The DC voltage can, in principle, be generated by a rectifier circuit. However, it is advantageous to carry out the rectification by means of a transformer with a center tap on the secondary coil.

[0038] The LLC converter is therefore an electrical circuit that is powered by an AC mains voltage on the input side and can be connected to the light source, for example one or more LEDs, and provides a DC voltage on the output side for a defined operation.

[0039] The in Figure 1The illustrated control gear 1 has an input 4. An input voltage is applied to input 4; this can preferably be a rectified mains input voltage UNETZ. The mains input voltage UNETZ can, for example, also be rectified and then fed to a power factor correction circuit (PFC) (not shown here), which provides a stabilized DC voltage for the LLC converter. The control gear 1 is depicted as an LLC converter. Starting from input 4, this is followed by a half-bridge circuit 5 and then a series resonant circuit 6. The LED output 8 is then supplied via a transformer 7. The generated output voltage ULED is provided at the LED output 8 for the light source 2.

[0040] In the operating device 1 shown, an alternating voltage or an alternating current is generated by the half-bridge circuit 5 and supplied to a series resonant circuit 6. The energy supplied by the alternating voltage oscillates in a resonant circuit and is at least partially transferred to the load of the transformer 7.

[0041] The series resonant circuit of the LLC converter generally consists of a capacitor C, an inductor L, and an additional coil L'. The additional coil L' serves to transport the energy supplied by the AC voltage to the light source 2 as the load. To transport the energy, the load is coupled to the series resonant circuit 6 via the transformer 7. The transformer 7 acts as a galvanic barrier (galvanic block) between the generated AC voltage and the DC voltage supplied to the light source.

[0042] Transformer 7 provides galvanic isolation between the high-voltage input section and the low-voltage output section for the light source 2. Transformer 7 thus creates a potential barrier, also known as a SELV barrier, for protective isolation. In transformer 7, a primary-side alternating current induces an alternating magnetic field, which induces an alternating output current in the secondary-side coils. The primary-side input coil and the at least one secondary-side output coil are shown in Figure 1 Two output coils are mounted, for example, on a ferrite or iron core with high magnetic permeability µ. Power transfer between the primary and secondary sides occurs essentially via an alternating magnetic field through the magnetic flux Φ in the ferrite core of the transformer.

[0043] It is common to generate additional auxiliary voltages induced via auxiliary windings on the ferrite core, which, for example, supply control circuits of the operating device with electrical energy via supply lines.

[0044] The transformer 8 exhibits not only a magnetic flux Φ in the ferrite core, which, originating from the primary windings, also flows through the secondary windings of the transformer, but also a magnetic leakage flux Φs. Due to the necessary spatial separation between several windings of the transformer, a magnetic leakage flux Φs occurs. This magnetic leakage flux Φs originates from the primary winding but does not penetrate the secondary-side coils. Consequently, this leakage flux Φs does not contribute to the magnetic coupling between the primary and secondary sides of the transformer 7. The magnetic leakage flux Φs is therefore to be understood as a "flux loss." This magnetic leakage flux Φs can be reduced by wrapping the transformer 7 with copper foil. This results in a reduction of the power loss of the transformer 7.

[0045] According to the invention, an inductive coupling element 9 is arranged in the region of the magnetic leakage flux Φ s of the transformer 7. This inductive coupling element 9 can, for example, be designed as at least one conductor loop or in the form of an antenna with a suitable design. A current is induced in the inductive coupling element 9 by the magnetic leakage flux Φ s, which can then be used to supply voltage to the electrical circuit 3. With the arrangement according to the invention, leakage power of, for example, 1 to 4 watts can be extracted from the magnetic or electromagnetic leakage field to supply active electrical circuits that have only low power consumption.

[0046] The preceding discussion of the voltage supply according to the invention is based on the magnetic field or inductances. This consideration is equally valid for the consideration of electromagnetic fields. Here, the term inductive coupling element 9 is to be used synonymously with the term antenna. An example of an inventive use of an electromagnetic field will be given later with reference to the Figure 5 explained.

[0047] The electrical circuit 3 according to the in Figure 1The illustrated embodiment comprises, in addition to an inductive coupling element 9, a power supply unit comprising a rectifier 10 and a capacitor 11. The rectifier 10 receives an alternating voltage induced in the inductive coupling element 9 and, by rectification, generates a low-voltage direct voltage with a suitable voltage level for supplying a control circuit 12. This low-voltage direct voltage is applied to a storage device 11, which, for example, smooths this low-voltage direct voltage, short-circuits voltage peaks, and stores electrical energy.

[0048] The storage medium 11 is preferably implemented as a capacitor (capacitance). In particular, a high-energy-density capacitor is suitable as the storage medium 11. A double-layer capacitor, also known as an electrochemical double-layer capacitor (EDLC) or supercapacitor (goldcap), can be used particularly advantageously as the storage medium 11.

[0049] The electrical circuit 3 according to Figure 1 The system further comprises a sensor 13, which is supplied with voltage via the control circuit 11. A measured quantity recorded by the sensor, for example for a physical parameter to be measured such as brightness, is recorded by the control circuit 12, temporarily stored according to one embodiment, and / or transmitted in the form of recorded sensor data to a first communication means 14.

[0050] The first communication means 14 according to an advantageous embodiment is, for example, designed to transmit sensor data in the form of a sensor signal to the operating device 1. The first communication means 14 of an embodiment comprises a modulator. The first communication means 14 can further comprise line drivers for transmitting the sensor signal to the operating device 1 via special sensor signal lines. The first communication means 14 of a further

[0051] The exemplary embodiment comprises a bus driver for transmitting the sensor data via a bus, in particular a DALI bus. The electrical circuit 3 according to Figure 1 Figure 1 shows a sensor signal line from the first communication device 14 to the inductive element 9. The first communication device 14 after Figure 1is designed to transmit a signal wirelessly to the operating device 1, for example by means of a special transmitting inductance or by suitable modulated clocking of the inductive coupling element 9.

[0052] The operating device 1 according to one embodiment of the invention comprises a Figure 1 Second communication means not shown. The second communication means is designed to receive the signal with the sensor data and / or other data such as control data, status data, etc., to demodulate the signal, and to extract the transmitted information and / or sensor data and make it available for further processing in the operating device 1 and / or transmission to other receivers by the operating device.

[0053] Exemplary embodiments of the invention with different configurations of the communication channel for signal transmission between operating device 1 and electrical circuit 3 are described with reference to the Figures 3 and 4 explained in more detail.

[0054] First, in Figure 2 Two views of an arrangement according to the invention, corresponding to a first embodiment of the invention, are shown. In the upper partial view of the Figure 3 The figure shows a top view of an arrangement according to the invention consisting of operating device 1 and electrical circuit 3.

[0055] The electrical circuit 3 in Figure 2 The sensor 13, for example a motion sensor, is connected via two sensor lines 16, 17. These sensor lines 16, 17 can ensure the power supply to the sensor 13 as well as the transmission of sensor signals (sensor data) to the main assembly 3.1 of the electrical circuit 3. The main assembly 3.1 of the electrical circuit 3 is located in Figure 2as an electrical circuit 3 represented as a printed circuit board 20 with components 18, 19, 21 mounted on it. The printed circuit board 20 further has a [missing information] in the upper partial view of the Figure 2 The illustrated conductor track structure 22 realizes the inductive coupling element 9.

[0056] Contrary to the portrayal in Figure 2 The electrical circuit 3 is preferably arranged in its own circuit housing. This circuit housing is particularly preferably designed to be permeable to magnetic fields and to have low attenuation, at least in the area of ​​the magnetic coupling element 9. This circuit housing can also only partially cover the electrical circuit 3. For example, the circuit housing can be shaped such that it only covers a top surface of the electrical circuit 3 that is not protected by the housing cover 24.

[0057] The housing cover 24 of one embodiment of the invention further features a marking 25 on its upper surface. The upper surface of the housing cover 24 is the surface of the housing cover 24 that faces outwards after the housing cover 24 and the housing 23 have been assembled. The marking 25 can be a color-coded or tactilely distinguishable marking and designate an area on the housing cover 24. If the inductive coupling element 9 is arranged on this marked area of ​​the housing cover 24, the magnetic coupling element 9 will be able to extract a particularly high leakage power from the magnetic or electromagnetic leakage field. According to a further embodiment, the marking 25 can be designed such that it can at least partially fulfill the function of a mechanical fastening of the electrical circuit 3 to the housing cover 24.This can be achieved, for example, by forming rail-like guides on the top of the housing cover 24.

[0058] The circuit housing of the electrical circuit 3 or the printed circuit board 20 can be attached to the housing 23, for example, by screwing or adhesive bonding, or, as shown in Figure 2 shown, to be attached to the housing cover 24. At least additional adhesion of the electrical circuit 3 to the housing 23 is achieved by the magnetic force exerted by the inductive element (transformer) 7 on the electrical circuit 3 in the direction of the housing cover 24.

[0059] In the lower partial view of the Figure 2Figure 1 shows a side view of the arrangement according to the invention, consisting of the control gear 1 and the electrical circuit 3, in a partial section. In one area of ​​the lower part of the figure, the housing 23 is shown such that the spatial arrangement of the transformer 7 on a main circuit board 26 of the control gear 1 is visible. The lower part of the figure is used to illustrate this. Figure 2 It is evident that the inductive coupling element 9 is arranged directly above the transformer 7, but external to the housing 23 with housing cover 24 of the operating device 1. This results in a particularly favorable arrangement of the inductive coupling element 9 with regard to the energy to be extracted from the stray field of the transformer 7.

[0060] In Figure 3Figure 1 shows a schematic representation of an electrical circuit according to a first embodiment of the invention. A communication channel is implemented as a feedback channel between the electrical circuit 3 and the control gear 1. This communication channel is fed by a first communication means 14 on the side of the electrical circuit 3. The first communication means 14 can include a modulator for generating a transmit signal by modulating the data to be transmitted onto a carrier. The transmit signal is transmitted either wirelessly via special data lines, via a bus, in particular via a DALI bus, or wirelessly to the control gear 1 and / or to other receivers, e.g., a central lighting control unit.The first communication means 14 can, for example, also include line drivers for transmitting the sensor signal to the operating device 1 via special sensor signal lines. The first communication means 14 of another embodiment includes a bus driver for transmitting the sensor data via a bus, in particular a DALI bus.

[0061] In Figure 4 Figure 1 shows a schematic representation of an electrical circuit according to the invention, corresponding to an advantageous second embodiment of the invention. The electrical circuit 3 according to Figure 4Figure 1 shows a switch 27. Switch 27 is controlled by the control circuit 12 and switched according to the data to be transmitted, e.g., sensor data from sensor 13. By switching switch 27, which can be implemented, for example, by a transistor, the load acting on an output 29 of the inductive element 9 is changed. Thus, by clocking the inductive element 9 via switch 27, a modulation of the load of the inductive element 9 is achieved depending on the switch signal output by the control unit 12. The control unit 12 can therefore transmit sensor data from sensor 13 to a control unit of the operating device 1 (not shown).The first communication device 14 is thus set up to wirelessly transmit sensor data to the operating device without requiring its own data lines from the electrical circuit 3 to the operating device 1 and without using conventional methods for wireless data transmission.

[0062] This provides a particularly advantageous arrangement of one or more sensors 13 in conjunction with at least one operating device 1 for light sources 2, which according to the invention requires only minimal additional circuitry and installation effort for power supply and signal transmission.

[0063] The communication channel between the operating device 1 and the electrical circuit 3 can also be bidirectional. The first communication means 14 and the second communication means must then be selected for duplex operation.

[0064] In Figure 5An arrangement according to the invention is shown in a further embodiment of the invention. The arrangement comprises an LED module 31 with an integrated control gear for operating a light source 2 and an electrical circuit 3.

[0065] In Figure 5 A light source 2 in the form of an LED is shown. The example of Figure 5 shows both a side section view of an LED module (top) and a top view of the LED module (bottom).

[0066] This example of Figure 5Figure 31 shows an LED module with an integrated control gear (not shown here). The control gear can include a driver circuit for operating at least one light source, for example, an LED array. Driver circuits for operating LEDs are known. For example, a buck converter or a buck-boost converter can be used as the driver circuit. The driver circuit can, for example, be designed to supply the LED 2 with a constant current.

[0067] The electrical circuit 3 with the sensor 13 can be constructed similarly to the preceding examples and preferably includes a control unit 12, a rectifier 10 and a capacitor 11 as well as a first communication means 14.

[0068] The transformer 37 provides galvanic isolation between the input-side section, which carries a voltage connected to the input network, and the output-side section, which provides a low-voltage supply voltage for the sensor 13 and is galvanically isolated from the input network. The transformer 37 thus creates a potential barrier, also known as a SELV barrier, for protective isolation. The transformer 37 is designed as a coreless transformer, in which the primary and secondary windings are preferably planar.

[0069] In the transformer 37, a primary-side alternating input current, preferably with a high frequency, for example in the range of 1 to 20 MHz, generates an alternating electromagnetic field that induces an alternating output current in the secondary-side coil. The primary-side input coil is arranged inside the housing 33 of the LED module 31. The at least one secondary-side output coil, acting as an inductive coupling element 39, is arranged outside the housing 33 of the LED module. For example, the secondary-side output coil can be arranged as part of the electrical circuit 3 on a film or circuit board, which is applied to the LED module, for example by means of an adhesive bond.

[0070] Power transfer between the primary and secondary sides occurs essentially via an alternating electromagnetic field through the magnetic flux of the transformer. According to this example, the transformer 37, with the secondary-side output coil acting as an inductive coupling element 39, is not formed by a single component, but rather by the primary winding and the secondary-side output coil, which are spatially separated from each other. This allows the secondary-side output coil to be located away from the LED module 31 and thus from the primary winding. However, the arrangement is chosen to enable power transfer between the primary and secondary sides via an alternating electromagnetic field.

[0071] According to the invention, an inductive coupling element 39 is arranged in the region of the electromagnetic field of the primary winding of the transformer 37. This inductive coupling element 39 can, for example, be designed as at least one conductor loop or in the form of an antenna with a suitable design. A current is induced in the inductive coupling element 39 by the magnetic leakage flux, which can then be used to supply voltage to the electrical circuit 3.

[0072] For example, in addition to the driver circuit for the LED, the LED module also contains a clock circuit for controlling and supplying the primary winding of transformer 37, i.e., the energy transfer element, at a high frequency. This clock circuit can be powered, for example, from an internal DC voltage or from the LED supply current.

[0073] In an optional variant, both energy and data can be transmitted via transformer 37 to electrical circuit 3 by means of appropriate timing using the clock circuit. In this way, the clock circuit and transformer 37 can be part of a communication channel between the operating device 1 and the electrical circuit 3.

[0074] The electrical circuit 3 can further include a modulator, which may be designed to pulse the secondary-side output coil as an inductive coupling element 39, thus forming a first means of communication. In this way, bidirectional communication can also take place via the transformer 37.

[0075] The LED module can thus be fitted with an attachment, for example, the attachment containing the electrical circuit 3. The sensor 13 of the electrical circuit 3 can, for example, contain a motion sensor and / or a brightness sensor. The attachment with the electrical circuit 3 can be designed such that it can be positioned on the LED module without affecting or restricting the light emission of the LED. In the example according to Figure 5 The attachment is ring-shaped and can, for example, be placed on the edge of a round LED spot module, thus enabling the function of the sensor 13, since it can be arranged in the direction of emission of the LED module without influencing or restricting the light emission of the LED.

[0076] According to a further development of the invention and the embodiments described above, the electrical circuit 3 can also have an additional or alternative third communication interface. This third communication interface can, for example, be configured as a third communication interface for the output and reception of wireless signals, in particular radio signals. For example, the third communication interface can be designed for the output and reception of radio signals according to a defined standard such as Bluetooth, WLAN, or Zigbee. The electrical circuit 3 can also exchange the wireless signals with other devices, such as additional control units or loads, without the need to integrate the operating device into this communication.In this way it is possible to provide an electrical circuit 3 with a sensor 13 which is supplied via a contactless energy transfer and is designed for the output and reception of wireless signals, in particular radio signals.

[0077] Parts of the electrical circuit 3 according to the exemplary embodiments can also be integrated into an integrated circuit. For example, the control unit 12, the rectifier 10, and optionally the first communication device 14 can be combined into a common integrated circuit. It would also be possible to integrate the sensor 13 into the integrated circuit. The integrated circuit can be implemented, for example, as a multi-chip module or a single-chip module.

Claims

1. Arrangement comprising an operating device (1) for at least one lamp (2) and an electrical circuit (3), the operating device (1) comprising at least one energy transmission element (7) which is designed as an inductive element, the inductive element being at least one part of an LLC transformer of the operating device (1), the energy transmission element (7) being designed such that a primary-side input alternating current in the energy transmission element (7) generates an alternating magnetic field which induces a secondary-side output alternating current which is supplied to the at least one lamp (2), and the electrical circuit (3) having an inductive coupling element (9) which is arranged in a magnetic or electromagnetic stray field of the energy transmission element (7), characterized in that the electrical circuit (3) is arranged externally to the operating device (1) so that a current is induced in the inductive coupling element (9) by the magnetic or electromagnetic stray field which is now used to supply voltage to the electrical circuit (3), that the inductive coupling element (9) is designed as at least one conductor loop or in the form of an antenna that has a suitable construction, that the operating device (1) comprises a housing (23) and a housing cover (24), that the electrical circuit (3) is arranged outside the housing (23), the housing (23) being designed to be permeable to magnetic fields and to have low attenuation at least in the region of the inductive coupling element (9), and the housing cover (24) having a marking (25) on the surface which faces outwards after the housing cover (24) and the housing (23) have been assembled, in order to designate a marked region on the housing cover (24) so that, when the inductive coupling element (9) is arranged on this marked region, the inductive coupling element (9) is designed to draw a particularly high stray power from the magnetic or electromagnetic stray field.

2. Arrangement according to claim 1, characterized in that the electrical circuit (3) comprises a voltage supply means (10, 11) designed to generate a supply voltage for the electrical circuit (3) from absorbed energy of the magnetic or electromagnetic stray field.

3. Arrangement according to either claim 1 or claim 2, characterized in that the electrical circuit (3) comprises a storage means (11), in particular a capacitor, for storing electrical energy.

4. Arrangement according to any of claims 1 to 3, characterized in that the electrical circuit (3) comprises a sensor (13), in particular a motion sensor, and / or a communication interface, and the energy transmission element (7) is configured to be controlled in a pulsed operation.

5. Arrangement according to any of claims 1 to 4, characterized in that the electrical circuit (3) comprises a first communication means (14) designed to communicate with the operating device (1).

6. Arrangement according to claim 5, characterized in that the first communication means (14) comprises a modulator designed to clock the inductive coupling element (9) and / or a transmitting inductance.

7. Arrangement according to either claim 5 or claim 6, characterized in that the first communication means (14) is designed to communicate with the operating device (1) by changing a load of the inductive coupling element (9).

8. Arrangement according to any of claims 5 to 7, characterized in that the operating device (1) comprises a second communication means designed to communicate with the first communication means (14) of the electrical circuit (3).

9. Arrangement according to any of the preceding claims, characterized in that the inductive coupling element (9) of the electrical circuit (3) is arranged on the housing cover (24) or is integrated into the housing cover (24).

10. Arrangement according to any of the preceding claims, characterized in that the arrangement further comprises an LED module (31), and that the operating device is integrated into the LED module (31).

11. Arrangement according to any of the preceding claims, characterized in that the electrical circuit (3) is designed to output and receive wireless signals, in particular radio signals.