EP2288850A2

EP2288850A2 - Wireless supplyable lighting module

Info

Publication number: EP2288850A2
Application number: EP09749601A
Authority: EP
Inventors: Bakuri Lanchava; Robert Kraus; Steven Wetzel
Original assignee: Osram GmbH
Current assignee: Osram GmbH
Priority date: 2008-05-23
Filing date: 2009-05-19
Publication date: 2011-03-02
Also published as: CN102037277B; WO2009141111A3; WO2009141111A2; CN102037277A; DE102008024779A1; US8901857B2; US20110210684A1

Abstract

The invention relates to a lighting module that is equipped with at least one receiver for the wireless tapping of energy from an alternating field and with at least one light source, in particular light-emitting diode that is connected to the receiver for tapping electric power. The at least one light-emitting module is surrounded at least partially, in particular totally, by a protective housing. A lighting module carrier is designed to secure several lighting modules and comprises at least one receiving area for the lighting module. The method for producing a wireless supplyable lighting module comprising at least one lighting module carrier and at least one lighting module comprises the following steps : a) distribution in bulk of the lighting module on the lighting module carrier and b) positioning the lighting modules.

Description

description

Wireless lighting module

The invention relates to a lighting module, a lighting module carrier and a method for producing a lighting device with at least one lighting module.

In recent years, a number of greatly improved light-emitting diodes, LEDs, with significantly increased light flux have been developed and put on the market. They are now competitive as bulbs for some niches of general lighting and decorative lighting. Often, a large number of LED lamps are used at the same time, which requires a great deal of effort in their installation or implementation. In addition, an attachment of LED lamps or LED lights today still requires a relatively large amount of space, and these are limited to specific locations for attachment.

Especially in the case of light-emitting diodes, the electrical supply of the LEDs has hitherto been accomplished in their lighting applications, usually lights of a traditionally customary construction, by wire or via board contacts. Larger LEDs are often supplied on a small (hexagonal) metal core board with semi-open eyelets (eg OSRAM, type: OSTAR LEW E3A), which can be connected in a type of socket. Typically, LEDs constructed in this way are screwed onto cooling surfaces and connected by wire or wire-like (spring contacts). Sockets which are better suited for general lighting LEDs have not yet been standardized. Therefore, today most known versions of the incandescent lamp area are used (retrofit), although these versions, for example, are not optimally designed for heat dissipation, are bulky and the lamps must be mounted at a specified location. WO 2007/008646 A2 discloses a general electromagnetic energy transmission device having a first resonator structure that receives power from an external power supply. The first resonator structure has a first quality factor. A second resonator structure is positioned distally of the first resonator structure and provides an operating current of an external load. The second resonator structure has a second quality factor. The spacing of the two resonators may be greater than the characteristic size of each resonator. A non- ^radiative energy transfer between the first resonator structure and the second resonator structure is achieved by means of coupling of its evanescent resonance field branches.

US 2005/0104453 A1 discloses a general wireless power transmission apparatus including a mechanism ¹ for receiving a radio frequency range over a collection of frequencies. The device comprises a mechanism for converting the radio radiation via the accumulation of frequencies into a DC voltage, preferably simultaneously. A wireless power supply method comprises the steps of receiving a range of radio radiation over a collection of frequencies and converting the conversion of the radio radiation to a DC voltage across the collection of frequencies, preferably simultaneously.

T. Sekitani et al., Nature Materials 6, 413 (2007), discloses a multilayer film that provides inductive coupling power to an electrical load can transfer. For this purpose, it has transistors, coils and microelectromechanical systems (MEMS) made of conductive plastics. A 50 g light laboratory sample is 21 _* 21 cm ² large, 1 mm thick and consists of a total of four superimposed films, two of which are responsible for a position detection of a receiver and two transmit the power. On one of the Both films for position detection are printed with a matrix of 25 mm diameter coils. The underlying second foil contains organic transistors with channel lengths of 13 μm for the logic. The film combination that transfers the current also consists of a film with coils and a second film with the MEMS matrix. Thanks to the coil matrix, the MEMS knows the position of the receiver and can specifically target only the transmission coil over which the object is located. The efficiency of the transmission is over 80 percent, and the received power increases linearly up to 40 W with the output power.

It is the object of the present invention to provide a possibility for particularly fast attachment of lighting modules, in particular LED lighting modules, which is preferably also spatially flexible and space-saving.

This object is achieved by means of a lighting module, a light module carrier and a method for producing a lighting device according to the respective independent claim. Preferred embodiments are in particular the dependent claims.

The lighting module has at least one receiver for the wireless tapping of energy from an alternating field, as well as at least one light source, which is connected to the receiver for tapping off electrical power. The alternating field may be a magnetic field, eg. B. in transformer (inductive) coupling, but may also have electrical components that can be used or unused. The lighting module is at least partially, in particular completely ^¬ constantly, surrounded by a protective housing.

Several light modules can be accommodated in a common housing, with a common receiver or with individual receivers. By means of the protective housing, the light module high mecha ^¬ African loads may be suspended or be used in a chemically aggressive environment. It can then be stored in particular without great care and in bulk, and thus very quickly spent on a light module carrier.

The protective housing can at least partially receive the at least one light module in a shell or cast, for example, in plastic.

Preferably, at least the mechanically and / or chemically sensitive parts of the lighting module are surrounded by the protective housing.

It is for ease of handling and production particularly preferred when the at least one light module is completely surrounded by the protective housing; then it is particularly preferred if the protective housing in a radiation direction of the light source (s) translucent, that is, transparent or translucent (opaque), and in the region of the receiving means, at least for the power transmitting field is permeable.

In only partial enclosure of the light module or the

Light modules, it is preferred if the light module is surrounded by the protective housing except for the receiver, in particular the coil and / or the antenna; the coil and / or the antenna can then be glued or printed, for example, on an outer side of the protective housing.

The energy transfer can be done, for example, in the ways described in WO 2007/008646 A2. Particularly preferred is an energy transfer by means of a large-area transmitter, as described in T. Sekitani et al. is described. It is particularly advantageous if the lighting module is designed so robust and compact that it is capable of being poured. As a result, smaller or larger quantities of the LED modules can be accommodated as required and added to an associated lighting device in order to realize the desired luminous properties.

For good distribution and easy alignment, it is advantageous if the lighting module or the protective housing is designed to be rollable, for example spherical or cylindrical. In the case of a cylindrical protective housing, for example, when receiving a plurality of lighting modules or light sources, these may be arranged in a row along the cylinder axis. You can have the same emission in one embodiment. Even if there are several

Light sources or lighting modules in a spherical protective housing are arranged in a preferred embodiment so that they radiate in the same direction.

It is further preferred if the lighting modules are configured individually or as a group with a reflector.

In particular, a light-emitting module which is capable of self-alignment is preferred, since in this way a particularly rapid attachment is made possible.

For this purpose, the light module may for example be equipped with a weight that shifts the center of gravity substantially from the center. In this way, when the luminous modules are poured out-in particular when using the spherical or cylindrical protective housings-they can be aligned along the force of gravity, in particular by additional shaking of the support.

Alternatively, the light module is equipped with at least one magnetically active element, for. B. a magnetic or magnetizable element. This ensures - in particular in a rollable embodiment - for the fact that the light module can be aligned with a predefined direction on an external magnetic field.

The self-alignment can also be achieved by providing a corresponding adhesion region, in particular if the lighting module is rollable. The light source can then roll, in particular, until it adheres to a base with the adhesive surface and is thereby aligned.

It is further preferred for ease of application, when the light module is self-adhesive. As a result, an attachment of the lighting modules can be performed even faster. The adhesion can preferably be done by means of magnetically active elements, as described above, including the light emitting module has a magnetic or magnetizable adhesive element, or by an external adhesive strip, for. B. with adhesive silicone, or even a part of a hook and loop fastener, etc.

The receiver preferably has at least one coil which generates a corresponding voltage which can be tapped off in an alternating magnetic field.

The energy transfer from at least one transmitter to the receiver of the at least one lighting module can in one

Embodiment by means of transformer coupling done, which may have a high efficiency especially in a well-tuned coupling between transmitter and receiver. Then the at least one light source can pick up the electrical power necessary for its operation, for example directly via at least one coil.

In another embodiment, the receiver may comprise a resonant circuit, in particular an LC resonant circuit. A resonant circuit typically has an associated resonant frequency at which the power output is particularly high. The resonant coupling of two resonant circuits, in particular especially higher quality, may be preferred because this (electro) magnetic energy can be transmitted with significantly smaller coupling factors than in transformer energy transfer and the air gap can be widened from the mm range in the cm range. This has a favorable effect on the feasibility of magnetic field-fed recording surfaces. Nevertheless, the RF emission remains very low, so that it continues to be regarded as a local field (near field).

In one embodiment, the at least one light source can be electrically connected to the resonant circuit via an inductive or capacitive tap; alternatively directly via a center tap.

In general, however, a capacitive or general electromagnetic coupling may also be used.

According to one embodiment, the lighting module has at least one white or colored light emitting diode as the light source.

In the presence of several LEDs, these z. B. same color (monochrome or multi-colored) and / or different colors shine. Thus, an LED module may have a plurality of individual LEDs ('LED cluster'), which together can give a white mixed light, z. B. in 'cold white' or 'warm white ¹ . In order to produce a white mixed light, the LED cluster preferably comprises light-emitting diodes which shine in the primary colors red (R), green (G) and blue (B). In this case, single or multiple colors can also be generated by several LEDs simultaneously; Combinations RGB, RRGB, RGGB, RGBB, RGGBB etc. are possible. However, the color combination is not limited to R, G and B (and A). For example, one or more amber LEDs 'amber' (A) may also be present to produce a warm white hue. For LEDs with different colors, these can also be controlled in this way be that the LED module radiates in a tunable RGB color range. To produce a white light from a mixture of blue light with yellow light can also be provided with light blue LED chips are used (so-called conversion LEDs), z. B. in surface mounting technology, z. In thin-GaN technology. An LED module can also have several white single chips, which can achieve a simple scalability of the luminous flux. The individual chips and / or the modules can be equipped with suitable optics for beam guidance, z. B. Fresnel lenses, collimators, and so on. It can be arranged on a contact several identical or different types of LED modules, for. B. several similar LED modules on the same substrate. Instead of or in addition to inorganic light emitting diodes, z. B. based on InGaN or AlInGaP, organic LEDs (OLEDs) are generally used.

Although, in principle, other types of light sources in the above bulbs are conceivable, but LEDs are particularly well suited for light modules, in particular encapsulated light modules.

Very favorable for LEDs, for example, that even with partial supply (dimming) both the good efficiency of the light source and the color temperature is largely maintained. Also ignition processes, such. B. at discharge lamps, or threshold power, such. B. incandescent, the LED has virtually no on. There are also no problems with burn hazards or high voltage in manual handling of the LED bulbs expected, there is a high level of security of such a lighting system. In addition, no cabling is needed.

In one embodiment, the lighting module has at least two diodes connected in antiparallel, of which at least one diode is a light-emitting diode. The other light emitting diode may also be a light emitting diode, or for example, a non-luminous diode, such as a Schottky diode. It is also possible to connect additional diodes, in particular light-emitting diodes be. In general, a single light-emitting diode can be used.

In particular, if the light source has a leadframe for electrical contacting (for example when using wire-bonded LED chips mounted on a common submount), it is preferred if the leadframe or a conductive strip formed thereon serves as the inductance , which is particularly space-saving.

As the substrate of the light module, for example, PCB, MCPCB, Flex or a ceramic (e.g., Al 2 O 3) may be used.

In particular, when using a light emitting diode one of the LED parallel connected capacitance and / or the "parasitic" capacitance of the LED itself can serve as a capacitance for the LC resonant circuit.

The light module can be equipped for better, in particular multi-frequency, power reception with a receiver or an antenna for wireless tapping of the energy from the at least alternating magnetic field, possibly according to US 7,027,311.

It may be advantageous for the integration of DC-operated elements, when the receiving means, a rectifier is connected downstream for converting AC voltage generated by the receiving means into a DC voltage, for. B. a full or half-bridge converter or a single rectifier.

It is generally preferred for trouble-free operation when the rectifier is followed by a capacitor of high energy density, in particular a double-layer capacitor, also electrochemical double-layer capacitors

("electrochemical double layer capacitor", EDLC) or supercapacitor, such as under the brand name Goldcap, Supercap, BoostCap or Ultracap commercially available. A double-layer capacitor has the highest energy density of all capacitors.

It may be present in a further embodiment, a logic circuit, for. For example, an integrated circuit such as a microcontroller, eg of the Texas Instruments MSP 430 type. As a result, the light module can be equipped with intelligence to enable a particularly flexible operation; the light sources are controlled by the microcontroller.

For sufficient time maintaining the supply voltage of the logic circuit at a sufficient voltage level, it is preferred if the logic circuit is preceded by a DC energy storage, in particular at least one double-layer capacitor.

In one embodiment, the voltage level is monitored by means of a voltage monitoring unit ("supervisor").

To activate the lighting module, it is preferably set up to receive and to use wirelessly transmitted control data (eg instructions) for the logic circuit.

For the individual control or addressing of individual lighting modules or lighting module groups, the control data preferably has an identification part or identification code (eg a serial number) which is matched to the lighting module to be addressed or the lighting modules to be addressed such that only one lighting module, for which this identification code is provided which utilizes the payload associated with the identification code. In particular, this makes it possible to address several groups of lighting modules, each with different ident codes, separately with regard to color selection and / or luminous intensity (dimming). This can be a

Luminous property of a luminaire equipped with these luminous modules th surface or a light-emitting body containing individually and flexibly adjusted.

The control data can z. B. be transmitted or initiated by means of a remote control.

The control data can be transmitted to the light module independently of the energy or power transmission; it is then preferred if the lighting module has its own control data receiving device for receiving and forwarding the

Control data to the logic circuit is equipped. For this purpose, it is preferably also able to decode control data.

Alternatively, the control data can be sent to the receiver via the alternating field provided for power transmission, in particular by signal modulation of the carrier provided for the power transmission.

In particular, in the case of a transmission with the alternating field provided for power transmission, the control data can be transmitted to the carrier, for example by means of ASK (amplitude shift keying), PSK (phase shift keying), FSK (frequency shift keying). or mixed forms thereof modulated and extracted again at the light module. The data can for example specify a setting of the luminosity by the microcontroller.

The lighting module is then, if it is equipped with a logic circuit, preferably configured to generate from the received power signal, a clock signal ("Clock"). For this purpose it can, for example, use the carrier frequency.

The light module carrier is set up for fastening a plurality of lighting modules and has at least one receiving surface for the lighting modules. The receiving surface has, for example, recesses for positioning the lighting modules, in particular for self-aligning lighting modules due to their weight. The depressions may be a predetermined, in particular regular, pattern, z. B. matrix pattern, have.

For receiving magnetically alignable and / or adhesive lighting modules, the receiving surface has at least one region which is either magnetic or magnetizable.

As a result, a magnetic adhesive force between the receiving surface and the lighting module is generated, which is sufficient to hold the lighting module in a predetermined position on the receiving surface and / or align. For this purpose, either the lighting module is equipped with a magnet and the receiving surface is magnetizable, or the receiving surface is magnetic and a fastening element of the light module is magnetizable or the receiving surface has a magnetic surface and the light emitting module has a magnetic element as an adhesive element. The magnetic regions may have a predetermined, especially regular, pattern, e.g. B. matrix pattern, have.

Particularly preferred is a Leuchtmodultrager, which comprises at least one, in particular flexible, magnetic film whose magnetic surface is a receiving surface or a part thereof. In one embodiment, a plurality of magnetic foils can also be assembled in order to obtain an enlarged recording surface. The magnetic film is thus preferably expandable. Preferred is a magnetic film with polymer matrix. A surprising feature of the flexible magnetic film is that it is against high frequency electromagnetic fields, eg. B. with the frequency of 500 KHz, no shielding effect unfolded. The supply of the light sources by means of local high-frequency fields is therefore not hindered. Even a full-flattened covering of the receiving surface with flexible magnetic foil is thus possible. The magic In addition, net foil allows almost any kind of placement of the light sources and is hardly susceptible to contamination.

A commercially available flexible magnetic film with a material thickness of z. B. 1.68 mm developed compared to ferrite material weak enough holding forces, compared to holding magnets or a structurally flexible magnetic sheet strong holding forces, so it is very well suited as a material for the receiving surface. The magnetic film thus preferably has a thickness of 1 mm to 2.5 mm in order to achieve a low weight and a flexibility with sufficient adhesive power.

The at least one transmitter is then preferably attached to one of the receiving surface opposite surface of the magnetic film.

Alternatively, a predetermined, in particular regular, pattern of adhesive areas, for. B. Velcro areas or Klebebe- be provided.

Preferably, the light module carrier has one or more transmitters for generating an at least magnetic coupling between the transmitter and the light sources for energy transmission, ie generation of an alternating field tuned to the receiver of the light module, in particular for resonant coupling. In one embodiment, a plurality of transmitters can be provided areally on the light module carrier, for. B. on the back of the receiving surface. It is preferred if a planar transmitter is provided, in particular as described by Sekitani, et al.

The object is also achieved by means of a lighting device with at least one lighting module carrier as described above and at least one lighting module as described above. The method for producing a wirelessly operable lighting device with at least one light module and at least one light module carrier has at least the following steps: Bulk-like distribution of the light modules over the light module carrier and aligning the light modules. The alignment can be done by means of self-alignment. The bulk-like distribution allows a much faster arrangement of the lighting modules than an individual positioning. This is especially true if the lighting modules are self-aligning on the light module carrier.

In particular, the lighting modules can be distributed in mass on the receiving surface, in particular by dumping, tilting or throwing, z. B. by means of a blade. This may optionally be followed by shaking.

For the production of solid lighting devices, a method is preferred, which further comprises the step of potting the lighting modules, for. B. in transparent plastic.

For example, the procedure for applying luminous modules to the receiving area can be such that illuminating modules are distributed en masse over the receiving area. In the presence of self-alignment and self-adhesion then non-adhesive lighting modules can be removed first, z. B. by tilting the lighting device. If the number or density of the lighting modules is insufficient, lighting modules can be redistributed as follows. This is done until a sufficient number of light modules have been mounted on the receiving surface. Due to the self-alignment, these bulbs do not need to be aligned separately. This results in a particularly simple and time-saving and cost-saving way, in particular to provide large-area lighting devices with a plurality of light sources.

Preferably, the support surface is set up so that the light-emitting devices at predetermined locations or areas adhere. After setting a desired array of lighting devices, in one embodiment, they may be potted in a transparent or translucent plastic material, including polymeric material. Thereafter, the receiving surface is removed, so that there is a lighting device in the form of a solid block with cast-in, preferably oriented bulbs. These can be externally fed wirelessly and thus provide a flat or volumetric light device. Optionally, the lighting device can then be further cast on the side on which the support surface was present; Alternatively, there may be applied a special transmitter surface which transfers energy to the bulbs, z. B. a planar inductive coupler based on polymer films, for. For example, according to Sekitani et al.

The system is intended in particular for general and decorative lighting.

In general, there is a high degree of flexibility in the design of the lighting device, since the direct connection to the power source is unnecessary.

In general, the lighting modules are not limited to an arrangement on a light source carrier. Rather, they can also be used in the sense of an aggregate of a Supension.

Thus, flexible spatial lighting design can be achieved by simply applying paint with embedded LED modules in certain places in the room. For this purpose, the lighting modules are preferably not aligned, but are distributed statistically or quasi-statistically with respect to their location. For example, a transparent or diffusely scattering adhesive layer or ink layer with embedded LED modules can be applied at certain locations on the walls of a common room. The protective housing is here especially intended for protection against chemical influences.

For single luminaires, the wattage of the luminaires can be varied by a quantity or concentration of the luminous modulus bulk material added thereto. For example, by the controlled mixing of the bulk material to the matrix, the luminosity of the lamp can be varied. Here an orientation of the lighting modules can be made, or not.

In a flat wall, z. B. a partition, or in a 3D object, for. As a sculpture, the lighting modules can be embedded as bulk material and by, possibly localized, induction at desired locations are made to glow.

In the following figures, the invention will be described schematically with reference to exemplary embodiments. It can be provided with the same reference numerals for better clarity identical or equivalent elements.

1 shows a circuit diagram of a system of a

Illuminated module carrier and three exemplified luminous modules;

2 shows a circuit diagram of a system comprising a further light module carrier and a lighting means;

3A shows a circuit diagram of a lighting module according to a further embodiment;

3B shows a circuit diagram of a lighting module according to yet another embodiment; FIG 4A shows a sectional view in side view of a physical embodiment of the lighting module of FIG 3B.

FIG. 4B shows a plan view of the lighting module from FIG. 4A;

5 shows a circuit diagram of a lighting module according to a further embodiment with a microcontroller;

6 shows a circuit diagram of a lighting module according to yet another embodiment with a microcontroller;

7 shows a circuit diagram of a lighting module according to yet another embodiment with a microcontroller;

FIG 8 shows a sectional view in side view of a physical embodiment of another Leuchtmo- module.

1 shows a circuit diagram of a system comprising a light module carrier 1 with a resonant power supply circuit 2 as a transmitter, which is operated by a high-frequency source generator 3, and three exemplarily designed lighting modules 4,5,6.

The high-frequency source generator 3 generates a high-frequency alternating voltage signal, which is fed into the supply resonant circuit or feeding resonant circuit 2. The feeding circuit 2 has two capacitors Ck and Cp and a coil 8 as shown, the high frequency signal being applied through the capacitor Cp. By means of the alternating voltage signal, a corresponding high-frequency magnetic field 9 is generated by the coil 8. The lamps 4,5,6 each have a resonant circuit 10,11 as a receiver. In detail, the first luminous means 4 has a resonant circuit 10 with a coil 16 and a capacitor (without reference numeral), wherein the resonant circuit has a predetermined resonant frequency. If the RF magnetic field 9 oscillates at the resonant frequency or near the resonant frequency, the resonant circuit 10 is particularly strongly excited, as a result of which a high power at the resonant circuit 10 can be tapped off in comparison to non-resonant excitation. These considerations are also valid for the resonant circuit 11 of the lighting means 5 and 6. In the first resonant circuit 10, the power is tapped by means of an inductive tap of two anti-parallel light-emitting diodes (without reference numerals) for their operation. The light-emitting diodes light up alternately during a current flow in their respective forward direction. The second light-emitting means 4 has a resonant circuit 11 with a coil and two capacitors (without reference numerals). In the second resonant circuit 11, the power is also tapped by means of a capacitive tap on one of the capacitors of two anti-parallel light-emitting diodes (without reference numerals) for their operation. The LEDs also light up alternately during a current flow in their respective forward direction. The third light-emitting means 6 has a Schottky diode instead of the second light-emitting means 5 instead of one of the light-emitting diodes. The LED lights up only during a current flow in their respective forward direction, but this is not perceived by the eye due to the high frequency of the change of direction.

The supply via the resonant coupling works for the embodiment shown only in a limited frequency range, which is known to be at about 10% of the carrier frequency of the AC signal used (eg, at +/- 25 KHz for a 500 KHz carrier). A time-division multiplex method can now be implemented, in which different carrier frequencies are supplied in time sequence, which are supplied by associated light sources (eg groups having different wavelengths). different colors or different arrangement) each received separately resonant. The respective groups can thus be controlled separately. The sequence is selected in time so that the eye perceives the illumination of the diode (s) as continuous without flickering. The lighting means can all have the same basic structure with a different dimensioning of the vibration components.

Alternatively, for example, a transformer coupling is conceivable.

FIG 2 shows a system similar to that of FIG 1, wherein now the light module carrier 12 has a resonant circuit 13 with two coils 14 connected in series. The two coils 14 have a lower number of turns compared to coil 8 of FIG. 1, in order to maintain the oscillation behavior of the resonant circuit 13. The two coils 14 can also be present as a double coil with two separate windings on a common core. By this arrangement, a lateral extension of the RF magnetic field 9 (upward in FIG

Figure) increases, so that the illuminant 4 finds a larger supply area with sufficient luminosity.

3A shows a block diagram of a further light-emitting module 15 for use with a generally at least magnetic coupling via a corresponding alternating field. The lighting module 15 has a resonant circuit with a capacitor 16 and an inductance 17, which form an LC resonant circuit. The inductor 17 may be in the form of a rectangular plane spiral, for example. A light emitting diode 18 picks up power directly through center tap between capacitor 16 and inductor 17. When generating a current flow in the resonant circuit, the light emitting diode 18 is always lit when the current flows in its forward direction. At sufficiently high frequency of the alternating field, the illumination of the LED is perceived as continuous. The light-emitting diode is representative of one or more light-emitting diodes, which may be connected in series, in parallel and / or in anti-parallel.

FIG. 3B shows a block diagram of a further light-emitting module 19 which, in contrast to the light-emitting module 15, now has a current storage capability. In addition to the light-emitting module 15 from FIG. 3A, this light-emitting module has a rectifier diode 20 connected to the resonant circuit 16, 17 and the light-emitting diode 18 for current rectification. The rectifier diode 20 may be replaced by any other suitable form of rectifier circuit, e.g. B. a Graetz circuit. Downstream of the rectifier diode 20 and connected in parallel with the light-emitting diode 18 is a storage capacitor 21 with an internal resistance Ri. With sufficient power of the resonant circuit 16, 17, a storage device is provided by this storage capacitor 21 of the light emitting diode 18, so that flickering of the light emitting diode 18 or even an interruption of the lighting operation at low frequency carrier fields or an interruption of the power supply is mitigated or prevented. The storage capacitor 21 is preferably a double-layer capacitor which has a particularly high energy density.

4A shows a side view of a possible physical embodiment of the lighting module according to FIG 3B. On a self-adhesive pad 22, the double-layer capacitor 21 is first applied, which in turn carries a substrate 23, wherein on the substrate 23 on the double-layer capacitor 21 opposite side of the LED 18, the capacitor 16 and the inductor (not shown) applied are. This light-emitting means 19 is surrounded by a protective housing 24 except for the self-adhesive outer side of the adhesive tape 22, the upper part of which is translucent in the region of the light-emitting diode 18, as indicated by the dotted line. FIG. 4B shows the substrate 23 in plan view with the light-emitting diode 18, capacitor 16 and rectangular planar spiral applied thereon as the inductance 17. The encapsulated lighting module 19 thus has a cuboidal disk shape.

FIG. 5 shows a block diagram of a lighting module 25 which, in contrast to the lighting module 19 from FIG. 3B, now has a logic circuit 26 in the form of a microcontroller of the NSP430 type from Texas Instruments. The microcontroller 26 is hooked into the current path to the light-emitting diode 18 behind the double-layer capacitor 21, so that it can also be supplied with power from the double-layer capacitor 21 ('supply') and at the same time can control a current supply to the light-emitting diode 18. Behind the microcontroller 26, a buffer capacitor 27 is connected in parallel with the light emitting diode 18 for bridging the light emitting diode 18. To supply the microcontroller 26 with a clock signal ('clock'), an additional electrical branch is picked up by the resonant circuit 16, 17, which leads to a clock input of the microprocessor 26 and a high-pass filter HP and this followed by a

Demodulator 28 has. As a result, for example, the carrier frequency of the supply signal can be used as the clock frequency; For adapting the clock signal Clock, a frequency divider can also be used. From the resonant circuit 16, 17, a data path continues to branch off to a data input of the microcontroller 26, which has a low-pass filter TP, followed by a demodulator diode 29. Via this data path, modulated control signals ('data') can be filtered out of the data signal and made available to the microprocessor 26. Thus, a lighting means with a microprocessor 26 can be operated via a single receiving part 16, 17. Examples of control data transmission methods which can be considered are ASK (amplitude shift keying), frequency shift keying (FSK), phase shift keying (PSK) and methods derived therefrom, and combinations of these methods - or carrier frequency of the power signal can thus determine the clock for the microcontroller 26, the modulated oscillation transmit the control information (commands) for the microcontroller 26. The rectification of the base or carrier frequency provides the supply voltage for the microcontroller 26. As control data, for example, be supplied to the light emitting diode 18 current, which can be used to dim the light emitting diode 18. The microcontroller thus serves in particular as a dri ^¬ calc. In another embodiment, in which the light emitting diode 18 having a cluster of a plurality of different colored LED chips which are mounted on a common submount, a current selectively individual colors can be assigned by the control signals Data so that a predetermined color change of the LED cluster is possible.

6 shows a block diagram of a further lighting module 30, in which now also an external voltage monitor SV is present, which is also fed from the supply line. The voltage monitor releases the microcontroller 26 via a reset line RST when a sufficient voltage level is present. Thereby, a continuous operation of the lighting module 30 is improved. Furthermore, the lighting module 30 now has an external driver 31, which is controlled by the microcontroller 26. By means of the external driver 31, the LED 18 may be controllable more precisely or with a higher current.

7 shows a lighting module 32 according to yet another embodiment, in which now the driver 31 is integrated in the microcontroller 26, which saves components.

The lighting modules 25, 30 and 32 according to FIGS. 5 to 7 are set up to be remotely controlled by control commands. As a result, for example, a luminous intensity and / or a color choice can be controlled. The lighting modules 25, 30 and 32 may alternatively have an antenna of their own for receiving the control data (not shown). 8 shows a sectional side view of a lighting module 33, which is now completely encapsulated in a protective housing 34. For better distributability, the housing 34 has a substantially spherical outer contour and encloses a magnet 35 in a lower region for self-adhesion and self-alignment. The light-emitting diode 18 is laterally surrounded by a reflector 36 for beam formation.

Of course, the present invention is not limited to the embodiments shown.

Reference sign list

1 light module carrier

2 supply resonant circuit 3 source generator

4 bulbs

5 bulbs

6 bulbs 8 coil 9 high-frequency magnetic field

10 receiver resonant circuit

11 receiver resonant circuit

12 light module carrier

13 resonant circuit 14 double coil

15 light module

16 capacitor

17 inductance

18 LED 19 Light module

20 logic circuit

21 double-layer capacitor

22 Self-adhesive pad

23 Substrate 24 Protective housing

25 light module

26 logic circuit

27 buffer capacitor

28 Demodulator diode 29 Demodulator diode

30 light module

31 drivers

32 light module

33 Light module 34 Protective housing

35 magnet

36 reflector Ck Capacitor Cp Capacitor HP High Pass Filter SV Voltage Monitor TP Low Pass Filter

Claims

claims

A light module (4; 5; 6; 15; 19; 25; 30; 32; 33) having at least one receiver (10; 11; 16,7) for wirelessly tapping energy from an alternating field (9) and having at least a light source, in particular light-emitting diode (18), which is connected to the receiver (10; 11; 16) for tapping off electric power, wherein the at least one light-emitting module is surrounded at least partially, in particular completely, by a protective housing (24; 34) , wherein the lighting module (33) is self-aligning.

2. lighting module (19; 33) according to claim 1, which is schuttgutfahig.

3. lighting module (33) according to claim 1 or 2, wherein the

Protective housing (34) is designed so that the lighting module (33) is rollable, in particular spherical or cylindrical.

4. lighting module (19; 33) according to one of the preceding claims, which is self-adhesive.

5. lighting module (4; 5; 6; 15; 19; 25; 30; 32; 33) according to one of the preceding claims, wherein the receiver comprises at least one resonant circuit (10; 11; 16, 17), in particular for resonant coupling wherein the at least one light source has a leadframe for electrical contacting, which serves as an inductance.

6. lighting module (25; 30; 32) according to one of the preceding claims, further comprising a logic circuit in the form of an integrated circuit (26), in particular Mikrocontrol- lers, wherein between the receiving part (16,17) and a supply port of the logic circuit (26) a rectifier (20) is interposed.

7. The light module of claim 6, further comprising a voltage monitoring unit for monitoring a voltage level.

8. lighting module (25; 30; 32) according to claim 6, which is adapted to receive wireless control data (Data) for the logic circuit (26), wherein the control data at least one identification code for individually controlling the lighting module (25; ; 32).

The light module (25; 30; 32) of any of claims 6 or 7, further adapted to generate a clock signal from a sensed power signal.

10. lighting module (25; 30; 32) according to any one of the preceding claims, further comprising a reflector.

11. Light module carrier (1) for fastening a plurality of lighting modules (4; 5; 6; 15; 19; 25; 30; 32; 33) according to one of claims 1 to 11, which has at least one receiving area for the lighting modules (4; 5; ; 15; 19; 25; 30; 32; 33), and a magnetic film whose magnetic surface forms the at least one receiving area.

12. Lighting device, comprising at least one light module carrier (1) and at least one light module

(4; 5; 6; 15; 19; 25; 30; 32; 33) according to any one of claims 1 to 10.

13. A method for producing a wireless feedable

Lighting device having at least one light module carrier (1) and at least one light module (4; 5; 6; 15; 19; 25; 30; 32; 33) according to one of claims 1 to 10, wherein the method comprises at least the following steps: - bulk material Distributing the light modules (19, 33) over the light module carrier (1) and - aligning the light modules (19, 33).

14. The method of claim 13, wherein the method comprises shaking.

15. The method according to any one of claims 13 or 14, wherein the method further comprises the following step:

- Potting the light modules.