EP2994689B1 - Led module for emitting white light ('pizza arrangement') - Google Patents

Led module for emitting white light ('pizza arrangement') Download PDF

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Publication number
EP2994689B1
EP2994689B1 EP14720948.0A EP14720948A EP2994689B1 EP 2994689 B1 EP2994689 B1 EP 2994689B1 EP 14720948 A EP14720948 A EP 14720948A EP 2994689 B1 EP2994689 B1 EP 2994689B1
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EP
European Patent Office
Prior art keywords
light
sectors
led module
light field
led
Prior art date
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Active
Application number
EP14720948.0A
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German (de)
French (fr)
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EP2994689A1 (en
Inventor
Thomas LEITGEB
Peter Pachler
Jürgen GUMHOLD
Florian Wimmer
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 Jennersdorf GmbH
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Tridonic Jennersdorf GmbH
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Publication of EP2994689A1 publication Critical patent/EP2994689A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/64—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/12—Combinations of only three kinds of elements
    • F21V13/14—Combinations of only three kinds of elements the elements being filters or photoluminescent elements, reflectors and refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/08—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for producing coloured light, e.g. monochromatic; for reducing intensity of light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
    • F21V9/32—Elements containing photoluminescent material distinct from or spaced from the light source characterised by the arrangement of the photoluminescent material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F21Y2105/12—Planar light sources comprising a two-dimensional array of point-like light-generating elements characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to an LED module for emitting mixed light, preferably white light, and a method for producing such an LED module.
  • the present invention relates to an LED module that is suitable for lights with small reflector sizes.
  • the present invention finally relates to a lighting device with built-in LED module.
  • LED modules which are suitable for emitting white light, see, for example WO 2013/015058 A1 . WO 2012/165007 A1 . US 2011/0278605 A1 and US 2011/0116252 A1 , These LED modules usually have a light-emitting light field, which is formed by a combination of individual light points. The individual points of light are designed to emit different light spectra. For example, blue light, red light and yellow light generated by a phosphor are emitted from the light spots.
  • Such a known LED module 10 is for example in the Fig. 1a shown.
  • Fig. 1b shows a top view of the same LED module 10.
  • the LED module 10 has a light field 12, which is arranged together with other components 18 on a module plate 17.
  • the light field 12 is formed from a plurality of light spots 13a, 13b, 13c, each of which emits light from another wavelength range, ie a different light spectrum.
  • Each of the light spots 13a, 13b, 13c is, as in FIG Fig. 1b shown assigned at least one LED 16.
  • the light spots 13a, 13b, 13c are generally formed by so-called glob tops (drops of disperse) above the LEDs 16.
  • the known LED module 10 has the disadvantage that it has too large a light field 12 in order to implement lamps with small reflector sizes.
  • the Glob Top method it is not possible to further reduce the diameter of the light field 12.
  • the object of the present invention is to provide an LED module for emitting mixed light, preferably white light, which improves the known state of the art.
  • the present invention relates to an LED module for emitting mixed light, preferably white light, which has a light field which is subdivided into a plurality of regions for emitting different light spectra, wherein the regions of the light field are areal sectors.
  • the light field is a light emitting surface of the LED module according to the invention. Due to the planar sector distribution of the light field, it is possible to significantly reduce the total area of the light field in comparison with the total area of a known LED module containing points of light defined by glob tops. Due to the sector arrangement, the total light emission surface of the light field can in particular be reduced by at least 16%. Such a reduction is not possible with the glob top approach known from the prior art. Due to the significant reduction in area of the light field, the LED module according to the invention is also suitable for lights with small reflector sizes.
  • At least two area sectors are provided for each light spectrum.
  • the LED module according to the invention is designed, for example, to emit three different light spectra. In each case a light spectrum is coupled out of at least two of the area sectors of the light field. As a result, a very homogeneous and color-true mixed light, in particular white light, can be generated by the LED module as a whole.
  • the outer contour of the light field is round. According to the invention, the outer contour of the light field is circular. The circular shape is particularly advantageous for lights that have optics with attached reflector.
  • circular sectors of the circular light field are designed to emit at least one light spectrum.
  • circular islands may be provided in the light field for outputting at least one other spectrum of light, which are advantageously designed to emit light from the red light spectrum.
  • Both the circular sectors and the circular islands in the light field are area sectors.
  • This advantageous arrangement of the area sectors in the light field for example, an LED module can be formed which emits mixed light of three or more different light spectra and thereby has a particularly small Oblichtabstrahl St. The light field can thus be reduced in area.
  • the light field is suitable for emitting white light of a particularly natural light color temperature.
  • the circular sectors are preferably designed for emitting red, blue light and light from a further light spectrum, which is generated by a phosphor.
  • This further light spectrum can be, for example, light from the green and / or yellow light spectrum.
  • circular islands can be provided for emitting red light, so that in this case no red light would have to be provided by the circular sectors.
  • the light field has a diameter of 16 mm or less.
  • the LED module according to the invention is adapted to implement a lamp with small reflector sizes.
  • the LED module further comprises a light diffusion plate, which is arranged at a distance from the light field in the light emission direction of the light field.
  • the light diffusion plate gives the LED module a more homogeneous color impression, i. the scattering of the light improves the mixing of the different light spectra emitted by the light field.
  • the light diffuser also makes it possible to generate a diffused light and adjust the brightness of the LED module.
  • the light diffusion plate may additionally be provided with a phosphor, for example with an additional phosphor layer or embedded phosphor particles. The diffuser is then suitable for influencing the color or color temperature of the light emitted by the LED module as a whole.
  • the lens is separated by a mixing chamber from the top of the light field.
  • the mixing chamber preferably ensures a particularly effective mixing of the different light spectra emitted by the flat sectors of the light field. For a viewer of the LED module then a very homogeneous mixed light is visible.
  • the individual planar sectors of the light field or the different light spectra emitted thereby are preferably not visible to a viewer from the outside.
  • the light field with the planar sectors is produced by insulation and filling.
  • the flat sectors of the light field can be produced particularly easily.
  • the method enables a much smaller light field than can be achieved with the well-known Glob Top method.
  • the sheet sectors may be a prefabricated component which is mounted on a module plate of the LED module.
  • planar sectors of the light field are separated from one another by dams.
  • the two-dimensional sectors of the light field comprise a transparent potting compound or a potting compound containing a phosphor.
  • the individual sectors of the light field are defined in the LED module by the limiting dams and in the spaces between the dams a potting compound is filled to make the sectors flat.
  • the potting compound may consist of a transparent potting compound with added phosphor, which is present for example as a powder undissolved in it or as a phosphor particle.
  • the potting compound may also contain dissolved phosphors, i. it can be a phosphor potting compound.
  • a phosphor is generally a material that is excitable by light and then emits a secondary spectrum of light.
  • a phosphor may therefore be a light color conversion material.
  • the phosphor is a phosphor or a fluorescent material. Secondary light from the yellow and / or green spectrum is preferably emitted by the phosphor.
  • planar sectors are designed at least for emitting light from the red light spectrum, light from the blue light spectrum or light from a further light spectrum generated by a phosphor.
  • the present invention understands light from the red light spectrum light having a wavelength between about 630 and 790 nm, light from the blue light spectrum light having a wavelength between about 390 to 480 nm, light from the green light spectrum light having a wavelength between about 480 and 560 nm and under light from the yellow light spectrum light of a wavelength between 560 and 630 nm.
  • the LED module according to the invention is thereby suitable for emitting white light, in particular natural-looking white light.
  • Natural-looking white light preferably has a light color temperature that corresponds to that of a black body.
  • the flat sectors are each provided with an LED strand.
  • the one LED string i.e., multiple interconnected LEDs
  • the LED or the LED strand are potted with the potting compound. This fixes and protects the LEDs or the LED string.
  • the light emitted by the LED or the LED strand is transported by the potting compound from the LED module and optionally influenced or converted by a phosphor in the potting compound.
  • the LEDs may be, for example, blue-emitting, red-luminescent, green-luminescent, yellow-emitting or UV-emitting LEDs.
  • the light spectrum emitted by a planar sector can come about through an interaction between at least one LED and the potting compound, or be generated directly by the at least one LED.
  • the present invention further relates to a method for producing a mixed-light LED module, preferably white light, comprising the steps of: generating a light field which is subdivided into area sectors by forming dams which sectors of the light field Separate, and filling a transparent potting compound or a phosphor-containing potting compound between the dams of each sector.
  • an LED module can be produced with reduced area light field.
  • the reduced area of the light field can not be achieved by a conventional Glob Top method.
  • the present invention further relates to a lighting device having at least one LED module as described above and preferably a reflector set on the LED module.
  • the luminaire is designed especially for small reflector sizes.
  • the LED module according to the invention in particular its area-reduced light field is a necessary prerequisite.
  • the Fig. 2a shows a three-dimensional side view of a first embodiment of an LED module according to the invention 1.
  • the LED module 1 is suitable for dispensing mixed light, for example, for emitting white light.
  • different emitted light spectra are mixed in the LED module 1 in such a way that the mixed light or the white light of the LED module 1 is produced as an overall impression for a viewer.
  • the LED module 1 has a module plate 7, on which at least one light field 2 is arranged, which is designed to emit the light of the LED module 1.
  • the light field 2 emits the light from its surface area.
  • further components 8 are advantageously arranged on the module plate 7.
  • These further components 8 may be, for example, electronic components such as drive components, microprocessors, capacitors, inductors, resistors, electrical leads or the like.
  • the electronic components can supply and / or control LEDs 6 or LED strands of the LED module 1 with energy.
  • the other components 8 may also include cooling elements for dissipating heat from the module plate 7 and the light field 2, respectively.
  • the module plate 7 may be provided with attaching means for attaching the LED module 1 in, for example, a lamp housing.
  • the module plate 7 as in Fig. 1a shown holes for screwing the LED module 1 on.
  • the module plate 7 may be, for example, a printed circuit board such as a printed circuit board (PCB).
  • PCB printed circuit board
  • the module plate 7 is advantageously at least partially formed from a material which is suitable for heat dissipation.
  • the light field 2 of the LED module 1 is subdivided into a plurality of areal sectors 3a, 3b, 3c.
  • Each of the sectors 3a, 3b, 3c is designed to emit light from a specific light spectrum.
  • the light field 2 comprises at least a first type of sectors 3 a, which emit light from a first light spectrum, a second type of sectors 3 b, which emit light from a second light spectrum, and a third type of sectors 3c that emit light from a third spectrum of light.
  • more different types of sectors can be used, giving off altogether four or even more different light spectra.
  • the light field 2 preferably comprises at least two sectors 3a, 3b, 3c.
  • the light field 2 may include a first type of sectors 3a that emit light from a blue light spectrum, a second kind of sectors 3b that emit light from a red light spectrum, and a third kind of Sectors 3c, which emit light from a further light spectrum, which is generated by a phosphor such as a phosphor.
  • This further light spectrum advantageously comprises the green and / or yellow light spectrum.
  • the different areas of the light field 2 which emit different light spectra are not formed by light points but by area sectors 3a, 3b, 3c, a reduction of the total area of the light field 2 is possible.
  • the total light emission surface of the LED module 1 can therefore be reduced.
  • the light field 2 around.
  • the light field 2 has a circular outer contour.
  • the outer contour may also be oval, elliptical or the like.
  • the diameter of the light field 2 is preferably 16 mm or even less.
  • the area of the light field 2 may be about 200 mm 2 or less and is reduced by 16% in comparison with the prior art.
  • the circular light field 2 has, as in Fig. 2a 1, preferably a subdivision into different types of circular sectors 3a and 3b, respectively.
  • the light field 2 as in Fig. 2a Further shown on several circular islands 3c, which within the outer contour of the light field. 2 are arranged.
  • a circular island 3 c form the center of the light field 2, ie, for example, form the center of the circular outer contour.
  • further circular islands 3c may for example be arranged at regular intervals along the circumference of the Liehtfeldes 2.
  • the light field 2, as in FIG Fig. 2a shown a total of eight circular sectors 3a and 3b, respectively.
  • the inner division of the planar sectors 3a, 3b, 3c of the light field 2 can also have other shapes than those shown here (cf., for example Fig. 3 ).
  • the circular islands 3c are provided for emitting light from the red spectrum.
  • the true circular sectors 3a and 3b are preferably provided for emitting light from the blue and / or a further light spectrum, which is generated for example by a phosphor.
  • planar sectors 3a, 3b, 3c of the light field 2 are inventively formed by dams and filling.
  • dams 5 are formed on the module plate 7 of the LED module in a first step, which determine the subsequent structure of the sectors 3a, 3b, 3c.
  • a dam 5 while the outer contour of the light field 2 is formed.
  • Circular dams 5 can be formed within the outer contour of the light field 2 to form circular islands.
  • the dams 5 are formed on the module plate 7, the spaces defined thereby are filled.
  • the filling is carried out either with a transparent potting compound or with a potting compound which is provided with a phosphor, for example with phosphor particles.
  • Phosphor particles may be in the potting compound as a powder Be provided phosphor.
  • the potting compound itself may have light-converting properties.
  • a phosphor is generally characterized in that it can be excited by the light of an LED 6 and then emits a secondary light spectrum.
  • an LED string is preferably arranged before the filling step.
  • these can also be previously embedded in the module plate 7 and the sectors 3a, 3b, 3c are thus formed on the LEDs 6.
  • the dams 5 can also be formed around arranged on the module plate 7 LEDs 6 and LED strands around.
  • the LEDs 6 or LED strands are preferably enclosed by the potting compound, which is filled between the dams 5.
  • the LEDs 6 or LED strands are supplied via the module plate 7 with power and preferably controllable.
  • Those sectors 3a, 3b, 3c which are filled with a transparent potting compound are designed to emit light emitted by one or more LEDs 6 unchanged.
  • red and / or blue light can be emitted by a red-emitting and / or blue-emitting LED 6.
  • Those sectors 3a, 3b, 3c which are filled with a potting compound containing a phosphor are adapted to emit light emitted by one or more LEDs 6 in a changed manner. This happens, for example, in that the light of these LEDs 6 excites the phosphor in the potting compound, whereby a secondary light spectrum is emitted from this. For example, yellow light or green light can thereby be generated and emitted.
  • each planar sector 3a, 3b, 3c may be provided with a potting compound that can change the light of the enclosed LED 6 or only some of the sectors 3a, 3b, 3c. It is even possible that each individual sector 3a, 3b, 3c of the light field 2 itself is designed to produce a white light.
  • a blue luminous LED 6 can be used, and can be used for each sector, a different phosphor potting compound as a filling.
  • a white light is generated by a combination of three different white lights and it can be achieved a particularly natural color temperature.
  • the LED strands of the various sectors 3a, 3b, 3c of the light field 2 are according to the invention individually controllable such that their luminous color is variable by the control. Furthermore, preferably each LED path can be dimmed individually, for example by means of pulse width modulation.
  • Fig. 2b shows a plan view of the LED module 1.
  • a lens 4 may be arranged, which is shown here as a dashed circle.
  • the diffuser 4 has at least the same diameter as the light field 2, preferably a larger diameter.
  • the diffusing screen 4 may be provided with scattering particles which are selected such that they scatter the light emitted by the light field 2.
  • the scattering particles have a particle size which corresponds approximately to the wavelength of the emitted light spectra.
  • the lens 4 is spaced from the top of the light field 2.
  • the mixing chamber is merely a free space between the light field 2 and the diffuser 4.
  • the mixing chamber is, however, preferably designed to achieve an effective mixing of the different light spectra emitted by the light field 2.
  • optical elements may be provided in the mixing chamber, for example.
  • Optical elements are, for example, lenses or reflectors.
  • the mixing chamber may also be a solid block of a material having a high refractive index, for example, of 1.5 or more.
  • the mixing chamber and the diffuser 4 together that the individual light spectra from the different area sectors 3a, 3b, 3c of the light field 2 are no longer distinguishable from a viewer of the LED module 1, but appear as a homogeneous mixed light, preferably homogeneous white light.
  • the Fig. 3 shows an alternative embodiment of a light field 2 'for an LED module according to the present invention.
  • the light field 2 ' comprises no circular islands 3c but only one circular sector 3a', 3b 'and 3' for emitting light from a specific light spectrum.
  • the Fig. 4 shows a further alternative embodiment of a light field 2 "for an LED module according to the present invention:
  • the light field 2 does not comprise circular islands 3c, but respectively different sectors 3a “, 3b” and 3c " first kind of sectors 3a ", the light from a first light spectrum, a second kind of sectors 3b", the light from a second light spectrum and a third kind of sectors 3c ", which can emit light from a third light spectrum.
  • Fig. 5 shows that in Fig. 4 illustrated light field 2 "again, in Fig. 5 the respective LED strands 6 "and their interconnection are indicated Fig. 5 Good to see, the connecting lines 7 "according to the invention in the area between the respective sectors 3a", 3b ", 3c" is provided.
  • the preferred layer structure of a carrier substrate for a light field 2, 2 ', 2 "according to the invention preferably comprises the following layers from the underside to the top: a highly reflective aluminum layer, an adhesive layer, an FR 4 layer, an electrical one conductive copper layer, a soldermask layer ("S oldermask” ), a protective layer.
  • the manufacturing method according to the invention of the LED module 1 and the LED module 1 itself make it possible to produce a lighting device having the LED module 1 and preferably an attached reflector. Since the present invention enables a reduction of the diameter of the light field 2, 2 ', 2 ", the LED module 1 is particularly advantageous for a luminaire optic with an attached reflector.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Led Device Packages (AREA)

Description

Die vorliegende Erfindung betrifft ein LED-Modul zur Abgabe von Mischlicht, vorzugsweise von Weißlicht, und ein Verfahren zur Herstellung eines solchen LED-Moduls. Insbesondere betrifft die vorliegende Erfindung ein LED-Modul, das für Leuchten mit kleinen Reflektorgrößen geeignet ist. Die vorliegende Erfindung betrifft schließlich eine Leuchtvorrichtung mit eingebautem LED-Modul.The present invention relates to an LED module for emitting mixed light, preferably white light, and a method for producing such an LED module. In particular, the present invention relates to an LED module that is suitable for lights with small reflector sizes. The present invention finally relates to a lighting device with built-in LED module.

Aus dem Stand der Technik sind LED-Module bekannt, die zur Abgabe von Weißlicht geeignet sind, siehe z.B. WO 2013/015058 A1 , WO 2012/165007 A1 , US 2011/0278605 A1 und US 2011/0116252 A1 . Diese LED-Module weisen in der Regel ein lichtabstrahlendes Lichtfeld auf, das durch eine Kombination einzelner Lichtpunkte gebildet wird. Die einzelnen Lichtpunkte sind dazu ausgelegt, unterschiedliche Lichtspektren abzugeben. Beispielsweise wird von den Lichtpunkten blaues Licht, rotes Licht und von einem Leuchtstoff erzeugtes gelbes Licht abgegeben.From the prior art, LED modules are known which are suitable for emitting white light, see, for example WO 2013/015058 A1 . WO 2012/165007 A1 . US 2011/0278605 A1 and US 2011/0116252 A1 , These LED modules usually have a light-emitting light field, which is formed by a combination of individual light points. The individual points of light are designed to emit different light spectra. For example, blue light, red light and yellow light generated by a phosphor are emitted from the light spots.

Ein solches bekanntes LED-Modul 10 ist beispielsweise in der Fig. 1a gezeigt. Fig. 1b zeigt eine Draufsicht desselben LED-Moduls 10. Das LED-Modul 10 besitzt ein Lichtfeld 12, das zusammen mit weiteren Komponenten 18 auf einer Modulplatte 17 angeordnet ist. Das Lichtfeld 12 ist aus mehreren Lichtpunkten 13a, 13b, 13c gebildet, die jeweils Licht aus einem anderen Wellenlängenbereich, d. h. ein anderes Lichtspektrum, abgeben. Jedem der Lichtpunkte 13a, 13b, 13c ist, wie in Fig. 1b gezeigt, wenigstens eine LED 16 zugeordnet. Die Lichtpunkte 13a, 13b, 13c sind in der Regel durch sogenannte Glob Tops (Dispenstropfen) über den LEDs 16 gebildet.Such a known LED module 10 is for example in the Fig. 1a shown. Fig. 1b shows a top view of the same LED module 10. The LED module 10 has a light field 12, which is arranged together with other components 18 on a module plate 17. The light field 12 is formed from a plurality of light spots 13a, 13b, 13c, each of which emits light from another wavelength range, ie a different light spectrum. Each of the light spots 13a, 13b, 13c is, as in FIG Fig. 1b shown assigned at least one LED 16. The light spots 13a, 13b, 13c are generally formed by so-called glob tops (drops of disperse) above the LEDs 16.

Das bekannte LED-Modul 10 hat den Nachteil, dass es ein zu großes Lichtfeld 12 aufweist, um damit Leuchten mit kleinen Reflektorgrößen umzusetzen. Insbesondere zeigt die Fig. 1b, dass das Lichtfeld 12 einen Durchmesser von mindestens 19 mm aufweist. Mit der Glob Top Methode ist es nicht möglich den Durchmesser des Lichtfelds 12 weiter zu verringern.The known LED module 10 has the disadvantage that it has too large a light field 12 in order to implement lamps with small reflector sizes. In particular, the shows Fig. 1b in that the light field 12 has a diameter of at least 19 mm. With the Glob Top method, it is not possible to further reduce the diameter of the light field 12.

Die Aufgabe der vorliegenden Erfindung ist es, ein LED-Modul zur Abgabe von Mischlicht, vorzugsweise Weißlicht, bereitzustellen, das den bekannten Stand der Technik verbessert. Insbesondere ist es eine Aufgabe der vorliegenden Erfindung, ein LED-Modul bereitzustellen, das für Leuchten mit kleinen Reflektorgrößen geeignet ist. Dazu ist es eine Aufgabe der vorliegenden Erfindung, eine Gesamtlichtabstrahlfläche eines LED-Moduls zu verkleinern.The object of the present invention is to provide an LED module for emitting mixed light, preferably white light, which improves the known state of the art. In particular, it is an object of the present invention to provide an LED module that is suitable for lights with small reflector sizes. For this purpose, it is an object of the present invention to reduce a total light emitting surface of an LED module.

Die vorliegende Erfindung wird durch die unabhängigen Ansprüche gelöst. Die abhängigen Ansprüche bilden den Kerngedanken der vorliegenden Erfindung in vorteilhafter Art und Weise weiter.The present invention is solved by the independent claims. The dependent claims further form the essence of the present invention in an advantageous manner.

Insbesondere betrifft die vorliegende Erfindung ein LED-Modul zur Abgabe von Mischlicht, vorzugsweise von Weißlicht, das ein Lichtfeld aufweist, das in mehrere Bereiche zum Abgeben von unterschiedlichen Lichtspektren unterteilt ist, wobei die Bereiche des Lichtfeldes flächige Sektoren sind.In particular, the present invention relates to an LED module for emitting mixed light, preferably white light, which has a light field which is subdivided into a plurality of regions for emitting different light spectra, wherein the regions of the light field are areal sectors.

Als Lichtfeld wird eine Lichtabstrahlfläche des erfindungsgemäßen LED-Moduls bezeichnet. Durch die flächige Sektorenaufteilung des Lichtfeldes ist es möglich, die Gesamtfläche des Lichtfeldes im Vergleich mit der Gesamtfläche eines bekannten LED-Moduls, das durch Glob Tops definierte Lichtpunkte enthält, deutlich zu reduzieren. Durch die Sektorenanordnung kann die Gesamtlichtabstrahlfläche des Lichtfeldes insbesondere um mindestens 16% verkleinert werden. Eine solche Verringerung ist mit dem aus dem Stand der Technik bekannten Glob Top Ansatz nicht möglich. Durch die deutliche Flächenverringerung des Lichtfeldes ist das erfindungsgemäße LED-Modul auch für Leuchten mit kleinen Reflektorgrößen geeignet.The light field is a light emitting surface of the LED module according to the invention. Due to the planar sector distribution of the light field, it is possible to significantly reduce the total area of the light field in comparison with the total area of a known LED module containing points of light defined by glob tops. Due to the sector arrangement, the total light emission surface of the light field can in particular be reduced by at least 16%. Such a reduction is not possible with the glob top approach known from the prior art. Due to the significant reduction in area of the light field, the LED module according to the invention is also suitable for lights with small reflector sizes.

Vorteilhafterweise sind für jedes Lichtspektrum wenigstens zwei flächige Sektoren vorgesehen.Advantageously, at least two area sectors are provided for each light spectrum.

Das erfindungsgemäße LED-Modul ist beispielweise dazu ausgelegt, drei unterschiedliche Lichtspektren abzugeben. Jeweils ein Lichtspektrum wird dabei aus wenigstens zwei der flächigen Sektoren des Lichtfeldes ausgekoppelt. Dadurch kann insgesamt ein sehr homogenes und farbtreues Mischlicht, insbesondere Weißlicht, von dem LED-Modul erzeugt werden.The LED module according to the invention is designed, for example, to emit three different light spectra. In each case a light spectrum is coupled out of at least two of the area sectors of the light field. As a result, a very homogeneous and color-true mixed light, in particular white light, can be generated by the LED module as a whole.

Die Außenkontur des Lichtfeldes ist rund. Erfindungsgemäß ist die Außenkontur des Lichtfeldes kreisförmig. Die Kreisform ist insbesondere für Leuchten von Vorteil, die Optiken mit aufgesetztem Reflektor aufweisen.The outer contour of the light field is round. According to the invention, the outer contour of the light field is circular. The circular shape is particularly advantageous for lights that have optics with attached reflector.

Vorteilhafterweise sind Kreissektoren des kreisförmigen Lichtfelds zum Abgeben von wenigstens einem Lichtspektrum ausgelegt. Zusätzlich können kreisförmige Inseln in dem Lichtfeld zum Abgeben von wenigstens einem anderen Lichtspektrum vorgesehen werden, die vorteilhafterweise zum Abgeben von Licht aus dem roten Lichtspektrum ausgelegt sind.Advantageously, circular sectors of the circular light field are designed to emit at least one light spectrum. In addition, circular islands may be provided in the light field for outputting at least one other spectrum of light, which are advantageously designed to emit light from the red light spectrum.

Sowohl die Kreissektoren als auch die kreisförmigen Inseln in dem Lichtfeld sind flächige Sektoren. Durch diese vorteilhafte Anordnung der flächigen Sektoren in dem Lichtfeld, kann beispielweise ein LED-Modul gebildet werden, das Mischlicht aus drei oder mehr verschiedenen Lichtspektren abgibt und dabei eine besonders kleine Gesamtlichtabstrahlfläche aufweist. Das Lichtfeld kann also flächenreduziert werden.Both the circular sectors and the circular islands in the light field are area sectors. This advantageous arrangement of the area sectors in the light field, for example, an LED module can be formed which emits mixed light of three or more different light spectra and thereby has a particularly small Gesamtlichtabstrahlfläche. The light field can thus be reduced in area.

Dadurch kann zum einen ein besonders kleines Lichtfeld gebildet werden. Zum anderen ist das Lichtfeld zum Abgeben von Weißlicht einer besonders natürlichen Lichtfarbtemperatur geeignet. Die Kreissektoren sind dabei bevorzugt zum Abgeben von rotem, blauem Licht und von Licht aus einem weiteren Lichtspektrum ausgelegt, welches durch einen Leuchtstoff erzeugt wird. Dieses weitere Lichtspektrum kann beispielweise Licht aus dem grünen und/oder gelben Lichtspektrum sein. Wie oben angemerkt, können zusätzlich kreisförmige Inseln zur Abgabe von rotem Licht vorgesehen werden, so dass in diesem Fall durch die Kreissektoren kein rotes Licht mehr bereitgestellt werden müsste.As a result, on the one hand, a particularly small light field can be formed. On the other hand, the light field is suitable for emitting white light of a particularly natural light color temperature. The circular sectors are preferably designed for emitting red, blue light and light from a further light spectrum, which is generated by a phosphor. This further light spectrum can be, for example, light from the green and / or yellow light spectrum. As noted above, in addition circular islands can be provided for emitting red light, so that in this case no red light would have to be provided by the circular sectors.

Vorteilhafterweise weist das Lichtfeld einen Durchmesser von 16 mm oder weniger auf.Advantageously, the light field has a diameter of 16 mm or less.

Durch diesen im Vergleich zum Stand der Technik deutlich reduzierten Lichtfelddurchmesser ist das erfindungsgemäße LED-Modul dazu geeignet, eine Leuchte mit kleinen Reflektorgrößen umzusetzen.By this compared to the prior art significantly reduced light field diameter, the LED module according to the invention is adapted to implement a lamp with small reflector sizes.

Vorteilhafterweise weist das LED-Modul ferner eine Lichtstreuscheibe auf, die in einem Abstand zum Lichtfeld in Lichtabstrahlrichtung des Lichtfeldes angeordnet ist.Advantageously, the LED module further comprises a light diffusion plate, which is arranged at a distance from the light field in the light emission direction of the light field.

Die Lichtstreuscheibe verleiht dem LED-Modul einen homogeneren Farbeindruck, d.h. durch die Streuung des Lichts wird die Vermischung der unterschiedlichen Lichtspektren, die von dem Lichtfeld abgegeben werden, verbessert. Die Lichtstreuscheibe ermöglicht es ferner, ein diffuses Licht zu erzeugen und die Helligkeit des LED-Moduls einzustellen. Die Lichtstreuscheibe kann zusätzlich mit einem Leuchtstoff versehen sein, beispielweise mit einer zusätzlichen Leuchtstoffschicht oder eingebetteten Leuchtstoffpartikeln. Die Streuscheibe ist dann dazu geeignet die Farbe oder Farbtemperatur des von dem LED-Modul insgesamt abgegebenen Lichts zu beeinflussen.The light diffusion plate gives the LED module a more homogeneous color impression, i. the scattering of the light improves the mixing of the different light spectra emitted by the light field. The light diffuser also makes it possible to generate a diffused light and adjust the brightness of the LED module. The light diffusion plate may additionally be provided with a phosphor, for example with an additional phosphor layer or embedded phosphor particles. The diffuser is then suitable for influencing the color or color temperature of the light emitted by the LED module as a whole.

Vorteilhafterweise ist die Streuscheibe durch eine Mischkammer von der Oberseite des Lichtfeldes getrennt.Advantageously, the lens is separated by a mixing chamber from the top of the light field.

Die Mischkammer sorgt vorzugsweise für eine besonders effektive Vermischung der unterschiedlichen Lichtspektren, die von den flächigen Sektoren des Lichtfeldes ausgestrahlt werden. Für einen Betrachter des LED-Moduls ist dann ein sehr homogenes Mischlicht sichtbar. Die einzelnen flächigen Sektoren des Lichtfeldes bzw. die davon ausgesandten unterschiedlichen Lichtspektren sind vorzugsweise von außen für einen Betrachter nicht zu erkennen.The mixing chamber preferably ensures a particularly effective mixing of the different light spectra emitted by the flat sectors of the light field. For a viewer of the LED module then a very homogeneous mixed light is visible. The individual planar sectors of the light field or the different light spectra emitted thereby are preferably not visible to a viewer from the outside.

Erfindungsgemäß ist das Lichtfeld mit den flächigen Sektoren durch Dämmen und Füllen hergestellt.According to the invention, the light field with the planar sectors is produced by insulation and filling.

Durch diese auch als "dam-and-fill" Verfahren bezeichnete Methode können besonders einfach die flächigen Sektoren des Lichtfeldes hergestellt werden. Die Methode ermöglicht ein deutlich kleineres Lichtfeld, als es mit der bekannten Glob Top Methode zu erreichen ist. Die flächigen Sektoren können ein Fertigbauteil sein, das auf einer Modulplatte des LED-Moduls angebracht wird.By this method, also referred to as "dam-and-fill" method, the flat sectors of the light field can be produced particularly easily. The method enables a much smaller light field than can be achieved with the well-known Glob Top method. The sheet sectors may be a prefabricated component which is mounted on a module plate of the LED module.

Erfindungsgemäß sind die flächigen Sektoren des Lichtfeldes durch Dämme voneinander getrennt.According to the invention, the planar sectors of the light field are separated from one another by dams.

Erfindungsgemäß umfassen die flächigen Sektoren des Lichtfeldes eine transparente Vergussmasse oder eine einen Leuchtstoff enthaltende Vergussmasse.According to the invention, the two-dimensional sectors of the light field comprise a transparent potting compound or a potting compound containing a phosphor.

Erfindungsgemäß sind in dem LED-Modul die einzelnen Sektoren des Lichtfeldes durch die begrenzenden Dämme definiert und in die Zwischenräume zwischen den Dämmen ist eine Vergussmasse eingefüllt, um die Sektoren flächig zu gestalten. Die Vergussmasse kann aus einer transparenten Vergussmasse mit zugesetztem Leuchtstoff bestehen, der beispielweise als ein darin ungelöstes Pulver oder als Leuchtstoffpartikel vorliegt. Die Vergussmasse kann auch gelöste Leuchtstoffe enthalten, d.h. sie kann eine Leuchtstoff-Vergussmasse sein.According to the invention, the individual sectors of the light field are defined in the LED module by the limiting dams and in the spaces between the dams a potting compound is filled to make the sectors flat. The potting compound may consist of a transparent potting compound with added phosphor, which is present for example as a powder undissolved in it or as a phosphor particle. The potting compound may also contain dissolved phosphors, i. it can be a phosphor potting compound.

Ein Leuchtstoff ist allgemein ein Stoff, der durch Licht anregbar ist und daraufhin ein sekundäres Lichtspektrum abgibt. Ein Leuchtstoff kann deshalb ein Lichtfarbkonversionsstoff sein. Beispielweise ist der Leuchtstoff ein Phosphor oder ein fluoreszierendes Material. Bevorzugt wird durch den Leuchtstoff sekundäres Licht aus dem gelben und/oder grünen Spektrum abgegeben.A phosphor is generally a material that is excitable by light and then emits a secondary spectrum of light. A phosphor may therefore be a light color conversion material. For example, the phosphor is a phosphor or a fluorescent material. Secondary light from the yellow and / or green spectrum is preferably emitted by the phosphor.

Vorteilhafterweise sind die flächigen Sektoren zumindest zum Abgeben von Licht aus dem roten Lichtspektrum, Licht aus dem blauen Lichtspektrum beziehungsweise Licht aus einem weiteren durch einen Leuchtstoff erzeugten Lichtspektrum ausgelegt.Advantageously, the planar sectors are designed at least for emitting light from the red light spectrum, light from the blue light spectrum or light from a further light spectrum generated by a phosphor.

Die vorliegende Erfindung versteht unter Licht aus dem roten Lichtspektrum Licht einer Wellenlänge zwischen etwa 630 und 790 nm, unter Licht aus dem blauen Lichtspektrum Licht einer Wellenlänge zwischen etwa 390 bis 480 nm, unter Licht aus dem grünen Lichtspektrum Licht einer Wellenlänge zwischen etwa 480 und 560 nm und unter Licht aus dem gelben Lichtspektrum Licht einer Wellenlänge zwischen 560 und 630 nm.The present invention understands light from the red light spectrum light having a wavelength between about 630 and 790 nm, light from the blue light spectrum light having a wavelength between about 390 to 480 nm, light from the green light spectrum light having a wavelength between about 480 and 560 nm and under light from the yellow light spectrum light of a wavelength between 560 and 630 nm.

Das erfindungsgemäße LED-Modul ist dadurch zum Abgeben von Weißlicht, insbesondere von natürlich wirkendem Weißlicht, geeignet. Natürlich wirkendes Weißlicht hat bevorzugt eine Lichtfarbtemperatur, die der eines schwarzen Strahlers entspricht.The LED module according to the invention is thereby suitable for emitting white light, in particular natural-looking white light. Natural-looking white light preferably has a light color temperature that corresponds to that of a black body.

Erfindungsgemäß sind die flächigen Sektoren jeweils mit einem LED-Strang versehen.According to the invention, the flat sectors are each provided with an LED strand.

Der eine LED-Strang (d.h. mehrere verschaltete LEDs), sitzt bevorzugt zwischen den Dämmen der einzelnen Sektoren auf einer Modulplatte des LED-Moduls. Vorzugsweise sind die LED oder der LED-Strang mit der Vergussmasse vergossen. Dadurch werden die LEDs oder der LED-Strang fixiert und geschützt. Das von der LED oder dem LED-Strang abgegebene Licht wird von der Vergussmasse aus dem LED-Modul transportiert und dabei gegebenenfalls durch einen Leuchtstoff in der Vergussmasse beeinflusst oder konvertiert. Die LEDs können zum Beispiel blauleuchtende, rotleuchtende, grünleuchtende, gelbleuchtend oder im UV leuchtende LEDs sein. Das von einem flächigen Sektor abgegebene Lichtspektrum kann durch ein Zusammenspiel zwischen wenigstens einer LED und der Vergussmasse zustande kommen, oder direkt von der wenigstens einen LED erzeugt werden.The one LED string (i.e., multiple interconnected LEDs) preferably sits between the baffles of the individual sectors on a module plate of the LED module. Preferably, the LED or the LED strand are potted with the potting compound. This fixes and protects the LEDs or the LED string. The light emitted by the LED or the LED strand is transported by the potting compound from the LED module and optionally influenced or converted by a phosphor in the potting compound. The LEDs may be, for example, blue-emitting, red-luminescent, green-luminescent, yellow-emitting or UV-emitting LEDs. The light spectrum emitted by a planar sector can come about through an interaction between at least one LED and the potting compound, or be generated directly by the at least one LED.

Die vorliegende Erfindung betrifft ferner ein Verfahren zur Herstellung eines LED-Moduls zur Abgabe von Mischlicht, vorzugsweise Weißlicht, das die Schritte aufweist: Erzeugen eines Lichtfeldes, das in flächige Sektoren unterteilt ist, durch Ausbilden von Dämmen, welche Sektoren des Lichtfeldes voneinander trennen, und Einfüllen einer transparenten Vergussmasse oder einer einen Leuchtstoff enthaltenden Vergussmasse zwischen die Dämme eines jeden Sektors.The present invention further relates to a method for producing a mixed-light LED module, preferably white light, comprising the steps of: generating a light field which is subdivided into area sectors by forming dams which sectors of the light field Separate, and filling a transparent potting compound or a phosphor-containing potting compound between the dams of each sector.

Durch das erfindungsgemäße Verfahren kann ein LED-Modul mit flächenverringertem Lichtfeld hergestellt werden. Die verkleinerte Fläche des Lichtfeldes ist nicht durch ein herkömmliches Glob Top Verfahren erreichbar.By the method according to the invention, an LED module can be produced with reduced area light field. The reduced area of the light field can not be achieved by a conventional Glob Top method.

Die vorliegende Erfindung betrifft ferner eine Leuchtvorrichtung, die wenigstens ein LED-Modul wie oben beschrieben und vorzugsweise einen auf das LED-Modul gesetzten Reflektor aufweist.The present invention further relates to a lighting device having at least one LED module as described above and preferably a reflector set on the LED module.

Die Leuchte ist insbesondere für kleine Reflektorgrößen ausgelegt. Dazu ist das erfindungsgemäße LED-Modul, insbesondere dessen flächenreduziertes Lichtfeld eine notwendige Voraussetzung.The luminaire is designed especially for small reflector sizes. For this purpose, the LED module according to the invention, in particular its area-reduced light field is a necessary prerequisite.

Die vorliegende Erfindung wird nun noch detaillierter mit Bezug auf die beigefügten Zeichnungen beschrieben.

  • Fig. 1a und 1b zeigen ein LED-Modul, das aus dem Stand der Technik bekannt ist.
  • Die Fig. 2a und 2a zeigen ein erstes LED-Modul gemäß der vorliegenden Erfindung.
  • Die Fig. 3 zeigt eine alternative Ausgestaltung eines Lichtfelds für LED-Moduls gemäß der vorliegenden Erfindung.
  • Die Fig. 4 zeigt eine weitere alternative Ausgestaltung eines Lichtfelds für ein LED-Modul gemäß der vorliegenden Erfindung.
  • Die Fig. 5 zeigt das in Fig. 4 dargestellte Lichtfeld nochmals, wobei in Fig. 5 die jeweiligen LED-Stränge und deren Verschaltung angedeutet sind.
The present invention will now be described in more detail with reference to the accompanying drawings.
  • Fig. 1a and 1b show an LED module, which is known from the prior art.
  • The Fig. 2a and 2a show a first LED module according to the present invention.
  • The Fig. 3 shows an alternative embodiment of a light field for LED module according to the present invention.
  • The Fig. 4 shows a further alternative embodiment of a light field for an LED module according to the present invention.
  • The Fig. 5 shows that in Fig. 4 shown light field again, in Fig. 5 the respective LED strands and their interconnection are indicated.

Die Fig. 2a zeigt eine dreidimensionale seitliche Ansicht eines ersten Ausführungsbeispiels eines erfindungsgemäßen LED-Moduls 1. Das LED-Modul 1 ist zur Abgabe von Mischlicht, beispielsweise zur Abgabe von Weißlicht, geeignet. Dazu werden in dem LED-Modul 1 verschiedene abgegebene Lichtspektren derart gemischt dass als Gesamteindruck für einen Betrachter das Mischlicht oder das Weißlicht des LED-Moduls 1 entsteht.The Fig. 2a shows a three-dimensional side view of a first embodiment of an LED module according to the invention 1. The LED module 1 is suitable for dispensing mixed light, for example, for emitting white light. For this purpose, different emitted light spectra are mixed in the LED module 1 in such a way that the mixed light or the white light of the LED module 1 is produced as an overall impression for a viewer.

Das erfindungsgemäße LED-Modul 1 weist eine Modulplatte 7 auf, auf der wenigstens ein Lichtfeld 2 angeordnet ist, das zur Abgabe des Lichts des LED-Moduls 1 ausgelegt ist. Das Lichtfeld 2 strahlt das Licht aus seiner flächigen Oberfläche ab. Ferner sind vorteilhafter Weise auf der Modulplatte 7 noch weitere Komponenten 8 angeordnet. Diese weiteren Komponenten 8 können beispielweise elektronische Komponenten sein wie Ansteuerungskomponenten, Mikroprozessoren, Kapazitäten, Induktivitäten, Widerstände, elektrische Zuleitungen oder dergleichen. Die elektronischen Komponenten können LEDs 6 oder LED-Stränge des LED-Moduls 1 mit Energie versorgen und/oder steuern. Die weiteren Komponenten 8 können auch Kühlelemente zum Abführen von Wärme von der Modulplatte 7 bzw. dem Lichtfeld 2 enthalten. Ferner kann die Modulplatte 7 mit Anbringungsmitteln zum Anbringen des LED-Moduls 1 in beispielweise einem Leuchtengehäuse versehen sein. Beispielsweise weist die Modulplatte 7 wie in Fig. 1a gezeigt Löcher zum Anschrauben des LED-Moduls 1 auf. Die Modulplatte 7 kann beispielsweise eine Leiterplatte wie ein Printed Circuit Board (PCB) sein. Die Modulplatte 7 ist vorteilhafter Weise wenigstens teilweise aus einem Material gebildet, das zur Wärmeabfuhr geeignet ist.The LED module 1 according to the invention has a module plate 7, on which at least one light field 2 is arranged, which is designed to emit the light of the LED module 1. The light field 2 emits the light from its surface area. Furthermore, further components 8 are advantageously arranged on the module plate 7. These further components 8 may be, for example, electronic components such as drive components, microprocessors, capacitors, inductors, resistors, electrical leads or the like. The electronic components can supply and / or control LEDs 6 or LED strands of the LED module 1 with energy. The other components 8 may also include cooling elements for dissipating heat from the module plate 7 and the light field 2, respectively. Further, the module plate 7 may be provided with attaching means for attaching the LED module 1 in, for example, a lamp housing. For example, the module plate 7 as in Fig. 1a shown holes for screwing the LED module 1 on. The module plate 7 may be, for example, a printed circuit board such as a printed circuit board (PCB). The module plate 7 is advantageously at least partially formed from a material which is suitable for heat dissipation.

Das Lichtfeld 2 des LED-Moduls 1 ist in mehrere flächige Sektoren 3a, 3b, 3c unterteilt. Jeder der Sektoren 3a, 3b, 3c ist zur Abgabe von Licht aus einem bestimmten Lichtspektrum ausgelegt. Das Lichtfeld 2 umfasst wenigstens eine erste Art von Sektoren 3a, die Licht aus einem ersten Lichtspektrum abgeben, eine zweite Art von Sektoren 3b, die Licht aus einem zweiten Lichtspektrum abgeben, und eine dritte Art von Sektoren 3c, die Licht aus einem dritten Lichtspektrum abgeben. Natürlich können auch mehr verschiedene Arten von Sektoren verwendet werden, die insgesamt vier oder sogar mehr verschiedene Lichtspektren abgeben.The light field 2 of the LED module 1 is subdivided into a plurality of areal sectors 3a, 3b, 3c. Each of the sectors 3a, 3b, 3c is designed to emit light from a specific light spectrum. The light field 2 comprises at least a first type of sectors 3 a, which emit light from a first light spectrum, a second type of sectors 3 b, which emit light from a second light spectrum, and a third type of sectors 3c that emit light from a third spectrum of light. Of course, more different types of sectors can be used, giving off altogether four or even more different light spectra.

Für jedes abgegebene Lichtspektrum umfasst das Lichtfeld 2 vorzugsweise wenigstens zwei Sektoren 3a, 3b, 3c. Um Weißlicht als das Mischlicht zu erzeugen, kann das Lichtfeld 2 beispielsweise eine erste Art von Sektoren 3a umfassen, die Licht aus einem blauen Lichtspektrum abgeben, eine zweite Art von Sektoren 3b umfassen, die Licht aus einem roten Lichtspektrum abgeben, und eine dritte Art von Sektoren 3c umfassen, die Licht aus einem weiteren Lichtspektrum abgeben, das von einem Leuchtstoff wie beispielsweise einem Phosphor erzeugt wird. Dieses weitere Lichtspektrum umfasst vorteilhafterweise das grüne und/oder gelbe Lichtspektrum.For each emitted light spectrum, the light field 2 preferably comprises at least two sectors 3a, 3b, 3c. For example, to generate white light as the mixed light, the light field 2 may include a first type of sectors 3a that emit light from a blue light spectrum, a second kind of sectors 3b that emit light from a red light spectrum, and a third kind of Sectors 3c, which emit light from a further light spectrum, which is generated by a phosphor such as a phosphor. This further light spectrum advantageously comprises the green and / or yellow light spectrum.

Dadurch, dass in dem erfindungsgemäßen LED-Modul 1 die verschiedenen Bereiche des Lichtfeldes 2, welche unterschiedliche Lichtspektren abgeben, nicht durch Lichtpunkte sondern durch flächige Sektoren 3a, 3b, 3c gebildet werden, ist eine Verringerung der Gesamtfläche des Lichtfeldes 2 möglich. Die Gesamtlichtabstrahlfläche des LED-Moduls 1 kann also reduziert werden.Due to the fact that in the LED module 1 according to the invention the different areas of the light field 2 which emit different light spectra are not formed by light points but by area sectors 3a, 3b, 3c, a reduction of the total area of the light field 2 is possible. The total light emission surface of the LED module 1 can therefore be reduced.

Vorzugsweise ist, wie in Fig. 2a und 2b gezeigt, das Lichtfeld 2 rund. Erfindungsgemäß besitzt das Lichtfeld 2 eine kreisförmige Außenkontur. In anderen Ausführungsformen kann die Außenkontur aber auch oval, ellipsenförmig oder dergleichen sein. Der Durchmesser des Lichtfelds 2 beträgt vorzugsweise 16 mm oder sogar weniger. Die Fläche des Lichtfelds 2 kann etwa 200 mm2 oder weniger betragen und ist im Vergleich zum Stand der Technik um 16 % verringert. Das kreisförmige Lichtfeld 2 weist, wie in Fig. 2a gezeigt, vorzugsweise eine Unterteilung in verschiedene Arten von Kreissektoren 3a bzw. 3b auf.Preferably, as in Fig. 2a and 2b shown, the light field 2 around. According to the invention, the light field 2 has a circular outer contour. In other embodiments, the outer contour may also be oval, elliptical or the like. The diameter of the light field 2 is preferably 16 mm or even less. The area of the light field 2 may be about 200 mm 2 or less and is reduced by 16% in comparison with the prior art. The circular light field 2 has, as in Fig. 2a 1, preferably a subdivision into different types of circular sectors 3a and 3b, respectively.

Vorzugsweise weist das Lichtfeld 2 wie in Fig. 2a gezeigt ferner mehrerer kreisförmige Inseln 3c auf, die innerhalb der Außenkontur des Lichtfeldes 2 angeordnet sind. Beispielsweise kann, wie in der Fig. 2a gezeigt, eine kreisförmige Insel 3c die Mitte des Lichtfeldes 2 bilden, d.h. zum Beispiel den Mittelpunkt der kreisförmigen Außenkontur bilden. Zusätzlich können weitere kreisförmige Inseln 3c beispielweise in regelmäßigen Abständen dem Umfang des Liehtfeldes 2 entlang angeordnet sein. In einem bevorzugten Beispiel weist das Lichtfeld 2, wie in Fig. 2a gezeigt, insgesamt acht Kreissektoren 3a bzw. 3b auf. Allerdings kann die innere Aufteilung der flächigen Sektoren 3a, 3b, 3c des Lichtfeldes 2 auch andere Formen aufweisen als hier dargestellt sind (vgl. beispielsweise Fig. 3).Preferably, the light field 2 as in Fig. 2a Further shown on several circular islands 3c, which within the outer contour of the light field. 2 are arranged. For example, as in the Fig. 2a shown, a circular island 3 c form the center of the light field 2, ie, for example, form the center of the circular outer contour. In addition, further circular islands 3c may for example be arranged at regular intervals along the circumference of the Liehtfeldes 2. In a preferred example, the light field 2, as in FIG Fig. 2a shown a total of eight circular sectors 3a and 3b, respectively. However, the inner division of the planar sectors 3a, 3b, 3c of the light field 2 can also have other shapes than those shown here (cf., for example Fig. 3 ).

Vorzugsweise sind die kreisförmigen Inseln 3c zum Abgeben von Licht aus dem roten Spektrum vorgesehen. Die echten Kreissektoren 3a bzw. 3b sind vorzugsweise zum Abgeben von Licht aus dem blauen und/oder einem weiteren Lichtspektrum, das beispielsweise von einem Phosphor erzeugt wird, vorgesehen. Durch eine Auswahl der Durchmesser der kreisförmigen Inseln 3c und/oder der Flächen der Kreissektoren 3a bzw. 3b während des Herstellungsprozesses des LED-Moduls 1, kann die Farbe des LED-Moduls 1 bzw. dessen Farbtemperatur festgelegt werden.Preferably, the circular islands 3c are provided for emitting light from the red spectrum. The true circular sectors 3a and 3b are preferably provided for emitting light from the blue and / or a further light spectrum, which is generated for example by a phosphor. By selecting the diameters of the circular islands 3c and / or the surfaces of the circular sectors 3a and 3b during the manufacturing process of the LED module 1, the color of the LED module 1 or its color temperature can be set.

Die flächigen Sektoren 3a, 3b, 3c des Lichtfeldes 2 werden erfindungsgemäß durch Dämmen und Füllen gebildet. Dazu werden in einem ersten Schritt Dämme 5 auf der Modulplatte 7 des LED-Moduls ausgebildet, die die spätere Struktur der Sektoren 3a, 3b, 3c festlegen. Durch einen Damm 5 wird dabei die Außenkontur des Lichtfeldes 2 gebildet. Zur Unterteilung Sektoren 3a, 3b, 3c werden beispielweise geradlinige oder gebogene Dämme 5 innerhalb der Außenkontur des Lichtfeldes 2 gezogen. Zur Bildung von kreisförmigen Inseln können kreisförmige Dämme 5 innerhalb der Außenkontur des Lichtfeldes 2 gebildet werden.The planar sectors 3a, 3b, 3c of the light field 2 are inventively formed by dams and filling. For this purpose, dams 5 are formed on the module plate 7 of the LED module in a first step, which determine the subsequent structure of the sectors 3a, 3b, 3c. By a dam 5 while the outer contour of the light field 2 is formed. For subdivision sectors 3a, 3b, 3c, for example rectilinear or curved dams 5 are drawn within the outer contour of the light field 2. Circular dams 5 can be formed within the outer contour of the light field 2 to form circular islands.

Sobald die Dämme 5 auf der Modulplatte 7 ausgebildet sind, werden die dadurch festgelegten Zwischenräume gefüllt. Die Füllung erfolgt entweder mit einer transparenten Vergussmasse oder mit einer Vergussmasse, die mit einem Leuchtstoff, beispielsweise mit Phosphorpartikeln, versehen ist. Leuchtstoffpartikel können in der Vergussmasse als pulverförmiger Leuchtstoff vorgesehen sein. Auch die Vergussmasse selbst kann lichtkonvertierende Eigenschaften aufweisen. Ein Leuchtstoff zeichnet sich generell dadurch aus, dass er von Licht einer LED 6 angeregt werden kann und daraufhin ein Sekundärlichtspektrum abgibt.Once the dams 5 are formed on the module plate 7, the spaces defined thereby are filled. The filling is carried out either with a transparent potting compound or with a potting compound which is provided with a phosphor, for example with phosphor particles. Phosphor particles may be in the potting compound as a powder Be provided phosphor. The potting compound itself may have light-converting properties. A phosphor is generally characterized in that it can be excited by the light of an LED 6 and then emits a secondary light spectrum.

In jedem flächigen Sektor 3a, 3b, 3c wird vorzugsweise vor dem Schritt des Füllens ein LED-Strang angeordnet. Diese können aber auch schon zuvor in die Modulplatte 7 eingelassen worden sein und die Sektoren 3a, 3b, 3c werden folglich über den LEDs 6 ausgebildet. Die Dämme 5 können auch um auf der Modulplatte 7 angeordnete LEDs 6 bzw. LED-Stränge herum ausgebildet werden. Die LEDs 6 bzw. LED-Stränge werden vorzugsweise von der Vergussmasse, die zwischen die Dämme 5 gefüllt wird, umschlossen. Die LEDs 6 oder LED-Stränge sind über die Modulplatte 7 mit Strom versorgt und vorzugsweise ansteuerbar.In each planar sector 3a, 3b, 3c, an LED string is preferably arranged before the filling step. However, these can also be previously embedded in the module plate 7 and the sectors 3a, 3b, 3c are thus formed on the LEDs 6. The dams 5 can also be formed around arranged on the module plate 7 LEDs 6 and LED strands around. The LEDs 6 or LED strands are preferably enclosed by the potting compound, which is filled between the dams 5. The LEDs 6 or LED strands are supplied via the module plate 7 with power and preferably controllable.

Diejenigen Sektoren 3a, 3b, 3c, die mit einer transparenten Vergussmasse gefüllt sind, sind dazu ausgelegt, von einer oder mehreren LEDs 6 abgegebenes Licht unverändert abzugeben. Beispielsweise kann von solchen Sektoren 3a, 3b, 3c rotes und/oder blaues Licht von einer rotleuchtenden und/oder blauleuchtenden LED 6 abgegeben werden. Diejenigen Sektoren 3a, 3b, 3c, die mit einer einen Leuchtstoff enthaltenden Vergussmasse gefüllt sind, sind hingegen dazu ausgelegt, von einer oder mehreren LEDs 6 abgegebenes Licht verändert abzugeben. Dies geschieht beispielsweise dadurch, dass das Licht dieser LEDs 6 den Leuchtstoff in der Vergussmasse anregt, wodurch von diesem ein Sekundärlichtspektrum abgegeben wird. Beispielsweise kann dadurch gelbes Licht oder grünes Licht erzeugt und abgegeben werden.Those sectors 3a, 3b, 3c which are filled with a transparent potting compound are designed to emit light emitted by one or more LEDs 6 unchanged. For example, of such sectors 3a, 3b, 3c, red and / or blue light can be emitted by a red-emitting and / or blue-emitting LED 6. Those sectors 3a, 3b, 3c which are filled with a potting compound containing a phosphor, on the other hand, are adapted to emit light emitted by one or more LEDs 6 in a changed manner. This happens, for example, in that the light of these LEDs 6 excites the phosphor in the potting compound, whereby a secondary light spectrum is emitted from this. For example, yellow light or green light can thereby be generated and emitted.

In dem Lichtfeld 2 des erfindungsgemäßen LED-Moduls 1 kann jeder flächige Sektor 3a, 3b, 3c mit einer Vergussmasse versehen sein, die das Licht der eingeschlossenen LED 6 verändern kann oder aber nur einige der Sektoren 3a, 3b, 3c. Es ist sogar möglich, dass jeder einzelne Sektor 3a, 3b, 3c des Lichtfeldes 2 selbst dazu ausgelegt ist, ein Weißlicht zu erzeugen. Beispielsweise kann dazu in jedem Sektor 3a, 3b, 3c eine blau leuchtende LED 6 eingesetzt sein, und kann für jeden Sektor eine andere Leuchtstoff-Vergussmasse als Füllung verwendet sein. Dadurch wird ein Weißlicht durch eine Kombination von drei verschiedenen Weißlichten erzeugt und es kann eine besonders natürliche Farbtemperatur erreicht werden.In the light field 2 of the LED module 1 according to the invention, each planar sector 3a, 3b, 3c may be provided with a potting compound that can change the light of the enclosed LED 6 or only some of the sectors 3a, 3b, 3c. It is even possible that each individual sector 3a, 3b, 3c of the light field 2 itself is designed to produce a white light. For example, in each sector 3a, 3b, 3c, a blue luminous LED 6 can be used, and can be used for each sector, a different phosphor potting compound as a filling. As a result, a white light is generated by a combination of three different white lights and it can be achieved a particularly natural color temperature.

Die LED-Stränge der verschiedenen Sektoren 3a, 3b, 3c des Lichtfeldes 2 sind erfindungsgemäß einzeln derart ansteuerbar, dass ihre Leuchtfarbe durch die Ansteuerung veränderbar ist. Ferner kann vorzugsweise jede LED-Strecke einzeln gedimmt werden, beispielsweise mittels Pulsbreiten-Modulation.The LED strands of the various sectors 3a, 3b, 3c of the light field 2 are according to the invention individually controllable such that their luminous color is variable by the control. Furthermore, preferably each LED path can be dimmed individually, for example by means of pulse width modulation.

Fig. 2b zeigt eine Draufsicht auf das LED-Modul 1. Wie gezeigt kann vor der Lichtabstrahlfläche des Lichtfeldes 2 eine Streuscheibe 4 angeordnet sein, die hier als gestrichelter Kreis dargestellt ist. Die Streuscheibe 4 besitzt wenigstens denselben Durchmesser wie das Lichtfeld 2, vorzugsweise einen größeren Durchmesser. Die Streuscheibe 4 kann mit Streupartikeln versehen sein, die derart gewählt sind, dass sie das von dem Lichtfeld 2 abgegebene Licht streuen. Dazu weisen die Streupartikel eine Korngröße auf, die etwa der Wellenlänge der abgegebenen Lichtspektren entspricht. Vorzugsweise ist die Streuscheibe 4 von der Oberseite des Lichtfeldes 2 beabstandet angeordnet. Fig. 2b shows a plan view of the LED module 1. As shown, in front of the light emitting surface of the light field 2, a lens 4 may be arranged, which is shown here as a dashed circle. The diffuser 4 has at least the same diameter as the light field 2, preferably a larger diameter. The diffusing screen 4 may be provided with scattering particles which are selected such that they scatter the light emitted by the light field 2. For this purpose, the scattering particles have a particle size which corresponds approximately to the wavelength of the emitted light spectra. Preferably, the lens 4 is spaced from the top of the light field 2.

Zwischen der Oberseite des Lichtfeldes 2 und der Streuscheibe 4 ist vorzugsweise eine sogenannte Mischkammer vorhanden. Im einfachsten Fall ist die Mischkammer lediglich ein Freiraum zwischen dem Lichtfeld 2 und der Streuscheine 4. Die Mischkammer ist aber vorzugsweise dazu ausgelegt, eine effektive Durchmischung der verschiedenen Lichtspektren, die vom Lichtfeld 2 abgegeben werden, zu erzielen. Dazu können in der Mischkammer zum Beispiel optische Elemente vorgesehen sein. Optische Elemente sind beispielsweise Linsen oder Reflektoren. Die Mischkammer kann aber auch ein solider Block aus einem Material sein, das einen hohen Brechungsindex, beispielweise von 1,5 oder mehr aufweist. Insgesamt wird durch die Mischkammer und die Streuscheibe 4 zusammen erreicht, dass die einzelnen Lichtspektren, die von den verschiedenen flächigen Sektoren 3a, 3b, 3c des Lichtfeldes 2 abgegeben werden, nicht mehr von einem Betrachter des LED-Moduls 1 unterscheidbar sind, sondern als homogenes Mischlicht, vorzugsweise homogenes Weißlicht, erscheinen.Between the upper side of the light field 2 and the diffusing screen 4, a so-called mixing chamber is preferably present. In the simplest case, the mixing chamber is merely a free space between the light field 2 and the diffuser 4. The mixing chamber is, however, preferably designed to achieve an effective mixing of the different light spectra emitted by the light field 2. For this purpose, optical elements may be provided in the mixing chamber, for example. Optical elements are, for example, lenses or reflectors. However, the mixing chamber may also be a solid block of a material having a high refractive index, for example, of 1.5 or more. Overall, it is achieved by the mixing chamber and the diffuser 4 together that the individual light spectra from the different area sectors 3a, 3b, 3c of the light field 2 are no longer distinguishable from a viewer of the LED module 1, but appear as a homogeneous mixed light, preferably homogeneous white light.

Die Fig. 3 zeigt eine alternative Ausgestaltung eines Lichtfelds 2' für ein LED-Modul gemäß der vorliegenden Erfindung.The Fig. 3 shows an alternative embodiment of a light field 2 'for an LED module according to the present invention.

Im Unterschied zum in den Figuren 2a und 2b gezeigten Lichtfeld 2, umfasst das Lichtfeld 2' keine kreisförmigen Inseln 3c, sondern jeweils nur einen Kreissektor 3a', 3b' und 3' zur Abgabe von Licht aus einem bestimmten Lichtspektrum. Das Lichtfeld 2' umfasst dabei einen ersten Sektor 3a, der Licht aus einem ersten Lichtspektrum, einen zweiten Sektor 3b, der Licht aus einem zweiten Lichtspektrum und einen dritten Sektor 3c, der Licht aus einem dritten Lichtspektrum abgeben kann.Unlike in the FIGS. 2a and 2b 2, the light field 2 'comprises no circular islands 3c but only one circular sector 3a', 3b 'and 3' for emitting light from a specific light spectrum. The light field 2 'comprises a first sector 3a, the light from a first light spectrum, a second sector 3b, the light from a second light spectrum and a third sector 3c, which can emit light from a third light spectrum.

Die Fig. 4 zeigt eine weitere alternative Ausgestaltung eines Lichtfelds 2" für ein LED-Modul gemäß der vorliegenden Erfindung. Wiederum umfasst das Lichtfeld 2" keine kreisförmigen Inseln 3c, sondern jeweils verschiedene Sektoren 3a", 3b" und 3c". Dabei umfasst das Lichtfeld 2"eine erste Art von Sektoren 3a", die Licht aus einem ersten Lichtspektrum, eine zweite Art von Sektoren 3b", die Licht aus einem zweiten Lichtspektrum und eine dritte Art von Sektoren 3c", die Licht aus einem dritten Lichtspektrum abgeben können.The Fig. 4 shows a further alternative embodiment of a light field 2 "for an LED module according to the present invention: Again, the light field 2" does not comprise circular islands 3c, but respectively different sectors 3a ", 3b" and 3c " first kind of sectors 3a ", the light from a first light spectrum, a second kind of sectors 3b", the light from a second light spectrum and a third kind of sectors 3c ", which can emit light from a third light spectrum.

Die Fig. 5 zeigt das in Fig. 4 dargestellte Lichtfeld 2" nochmals, wobei in Fig. 5 die jeweiligen LED-Stränge 6" und deren Verschaltung angedeutet sind. Wie in Fig. 5 gut zu erkennen, sind die Anschlussleitungen 7" erfindungsgemäß im Bereich zwischen den jeweiligen Sektoren 3a", 3b", 3c" vorgesehen.The Fig. 5 shows that in Fig. 4 illustrated light field 2 "again, in Fig. 5 the respective LED strands 6 "and their interconnection are indicated Fig. 5 Good to see, the connecting lines 7 "according to the invention in the area between the respective sectors 3a", 3b ", 3c" is provided.

Der bevorzugte Schichtaufbau eines Trägersubstrats für ein erfindungsgemäßes Lichtfeldes 2, 2', 2" umfasst dabei von der Unterseite zur Oberseite vorzugsweise folgende Schichten: eine hoch reflektierende Aluminiumschicht, eine Klebeschicht, eine FR4-Schicht, eine elektrisch leitende Kupferschicht, eine Lötstoppschicht ("Soldermask"), eine Schutzschicht.The preferred layer structure of a carrier substrate for a light field 2, 2 ', 2 "according to the invention preferably comprises the following layers from the underside to the top: a highly reflective aluminum layer, an adhesive layer, an FR 4 layer, an electrical one conductive copper layer, a soldermask layer ("S oldermask" ), a protective layer.

Das erfindungsgemäße Herstellungsverfahren des LED-Moduls 1 und das LED-Modul 1 selbst ermöglichen es eine Leuchtvorrichtung herzustellen, die das LED-Modul 1 und vorzugsweise einen aufgesetzten Reflektor aufweist. Da die vorliegende Erfindung eine Verkleinerung des Durchmessers des Lichtfeldes 2, 2', 2" ermöglicht, ist das LED-Modul 1 insbesondere vorteilhaft für eine Leuchtenoptik mit einem aufgesetzten Reflektor.The manufacturing method according to the invention of the LED module 1 and the LED module 1 itself make it possible to produce a lighting device having the LED module 1 and preferably an attached reflector. Since the present invention enables a reduction of the diameter of the light field 2, 2 ', 2 ", the LED module 1 is particularly advantageous for a luminaire optic with an attached reflector.

Claims (8)

  1. An LED module (1) for emitting mixed light, preferably white light, which has
    - a light field (2"), which is divided into a plurality of regions for emitting different light spectra,
    - wherein the regions of the light field (2") are planar sectors (3a", 3b", 3c"),
    - the light field (2") with the planar sectors (3a", 3b", 3c") is produced by barriers (5) and filling,
    - the planar sectors (3a", 3b", 3c") of the light field (2") are separated from one another by barriers (5),
    - the planar sectors (3a", 3b", 3c") of the light field (2") comprise a transparent casting compound or a casting compound containing a luminescent material,
    - wherein the planar sectors (3a", 3b", 3c") in each case are provided with an LED strand, and
    - wherein the LED strands are arranged between the barriers (5) of the individual planar sectors (3a", 3b", 3c"),
    - wherein the light field (2") comprises
    - a first kind of sectors (3a"), which are designed to emit light from a first light spectrum,
    - a second kind of sectors (3b"), which are designed to emit light from a second light spectrum, and
    - a third kind of sectors (3c"), which are designed to emit light from a third light spectrum,
    - wherein the LED strands of the different planar sectors (3a", 3b", 3c") of the light field (2") can be controlled individually in such a manner that their luminous color can be changed by the control,
    characterized in that
    - the outer contour of the light field (2") is circular and
    - the LED module (1) has connecting lines (7") for the LED strands, which are provided in the region between the respective planar sectors (3a", 3b", 3c").
  2. An LED module (1) according to Claim 1, wherein for each light spectrum at least two planar sectors (3a", 3b", 3c") are provided.
  3. An LED module (1) according to Claim 1 or 2, wherein the light field (2") has a diameter of 16 mm or less.
  4. An LED module (1) according to any one of Claims 1 to 3, which furthermore has a light-scattering pane (4), which is arranged at a distance from the light field (2") in the light-emitting direction of the light field (2").
  5. An LED module (1) according to Claim 4, wherein the scattering pane (4) is separated by a mixing chamber from the upper side of the light field (2").
  6. An LED module according to any one of Claims 1 to 5, wherein the planar sectors (3a", 3b", 3c") are designed at least for the emission of light from the red light spectrum, light from the blue light spectrum or light from a further light spectrum generated by a phosphor.
  7. A method for producing an LED module (1) for the emission of mixed light, preferably white light according to any one of Claims 1 to 6, which has the steps
    - generating a light field (2"), which is divided into planar sectors (3a", 3b", 3c"), by
    - forming barriers (5), which separate sectors (3a", 3b", 3c") of the light field (2") from one another, and
    - filling a transparent casting compound or a casting compound containing a luminescent material between the barriers (5) of each sector (3a", 3b", 3c"),
    wherein the light field (2") comprises
    - a first kind of sectors (3a"), which are designed to emit light from a first light spectrum,
    - a second kind of sectors (3b"), which are designed to emit light from a second light spectrum, and
    - a third kind of sectors (3c"), which are designed to emit light from a third light spectrum;
    - providing the planar sectors (3a", 3b", 3c") with in each case one LED strand, wherein the LED strands are arranged between the barriers (5) of the individual planar sectors (3a", 3b", 3c"), and wherein the LED strands of the different planar sectors (3a", 3b", 3c") of the light field (2") can be controlled individually in such a manner that their luminous color can be changed by the control;
    characterized by the step:
    - providing the LED module (1) connecting lines (7") for the LED strands, which are provided in the region between the respective planar sectors (3a", 3b", 3c"),
    wherein the outer contour of the light field (2") is circular.
  8. A lighting device, which has at least one LED module (1) according to any one of Claims 1 to 6 and preferably has a reflector placed on the LED module (1).
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