EP2721342A2 - Beleuchtungseinrichtung - Google Patents
BeleuchtungseinrichtungInfo
- Publication number
- EP2721342A2 EP2721342A2 EP12727372.0A EP12727372A EP2721342A2 EP 2721342 A2 EP2721342 A2 EP 2721342A2 EP 12727372 A EP12727372 A EP 12727372A EP 2721342 A2 EP2721342 A2 EP 2721342A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- circuit board
- lighting device
- printed circuit
- heat sink
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005286 illumination Methods 0.000 claims description 8
- 230000005489 elastic deformation Effects 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 12
- 238000010168 coupling process Methods 0.000 abstract description 6
- 238000005859 coupling reaction Methods 0.000 abstract description 6
- 230000008878 coupling Effects 0.000 abstract description 5
- 239000003570 air Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- 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
- F21V5/00—Refractors for light sources
- F21V5/007—Array of lenses or refractors for a cluster of light sources, e.g. for arrangement of multiple light sources in one plane
-
- 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
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/005—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with keying means, i.e. for enabling the assembling of component parts in distinctive positions, e.g. for preventing wrong mounting
-
- 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
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
-
- 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
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
- F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
-
- 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
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
- F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
- F21V19/004—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by deformation of parts or snap action mountings, e.g. using clips
-
- 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
- F21V19/00—Fastening of light sources or lamp holders
- F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
- F21V19/003—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources
- F21V19/0055—Fastening of light source holders, e.g. of circuit boards or substrates holding light sources by screwing
-
- 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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
- F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
- F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
-
- 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
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
- F21V29/89—Metals
-
- 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
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
- F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear 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
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the invention relates to a lighting device according to the preamble of claim 1.
- the invention relates to a lighting device with at least one, arranged on a circuit board lamp and a heat sink having a heat input surface, which is connected in a thermally conductive surface with the circuit board.
- the illumination device has an elongate heat sink which has a planar heat coupling surface, which is heat-conductively connected to a reverse side of the printed circuit board facing away from the light-emitting diode.
- the heat sink is designed as an air guide body, which has lateral openings for the passage of cooling air.
- the heat loss occurring in the light-emitting diode during operation of the illumination device is first transmitted from the light-emitting diode through the front side of the printed circuit board into the printed circuit board, penetrates it and is then coupled into the heat-coupling surface of the heat sink through the rear side surface of the printed circuit board.
- the heat sink then transfers the heat to the cooling air flowing through its openings.
- Common are mechanical fasteners, such as screws, or a cohesive connection, which is made possible by an adhesive layer located between the rear side surface of the printed circuit board and the heat input surface of the heat sink.
- such a connection is relatively complex, since the required items (screws, glue) stockpiled and must be mounted.
- DE 10 2008 052 869 A1 describes an LED street lamp with a basic body which has a double convexly curved inner side. On this two-fold convex curved inside correspondingly curved mounting rails are arranged. In the mounting rails flexible strip-shaped circuit boards are inserted, which are curved accordingly. On the circuit boards LEDs with housings and reflectors are arranged so that the light distribution of the LED street light is determined by the double curvature of the inside of the body.
- the printed circuit boards should lie flat against the mounting rails in order to achieve good heat transfer from the printed circuit boards to the mounting rails.
- the housing of the LEDs are fastened with spring clips on the mounting rails. As a result, the circuit boards are only selectively pressed against the corresponding mounting rails.
- Rigid circuit boards typically have at least one layer of fiber reinforced plastic, e.g. made from glass fibers impregnated with epoxy resin, or cheaper paper impregnated with phenolic resin.
- flexible circuit boards are based on foils, e.g. made of polyimide films. Flexible printed circuit boards can be bent or rolled up without significant effort.
- the invention is based on the observation that the heat transfer of printed circuit boards of the lighting devices according to the prior art is either structurally complex or that the heat transfer is unsatisfactory. It is therefore an object to provide a lighting device of the type mentioned, which allows for a simple and inexpensive construction effective cooling of the bulb.
- the illumination device has at least one preferably rigid printed circuit board with at least one luminous means arranged thereon, e.g. at least one LED.
- the circuit board is connected areally with a heat input surface of the heat sink.
- the heat input surface of the heat sink is curved and the circuit board is clamped by means of connecting elements with the heat sink, so that the printed circuit board against a restoring force, preferably against the restoring force of the circuit board, is pressed flat against the heat input surface of the heat sink. Consequently, the printed circuit board is preferably pressed surface against the curved heat input surface of the heat sink against a force counteracting its elastic deformation. As a result, the printed circuit board is evenly pressed against the heat input surface. Thus, an optimal and uniform heat transfer is possible. Of course, to achieve this effect, the circuit board does not have to be directly adjacent to the heat interface.
- the intermediate layer may be plastic, e.g. to compensate for bumps.
- the printed circuit board is pressed by this tension over the heat input surface of the heat sink largely uniformly to the heat sink, whereby a good heat dissipation occurring in the lamp heat loss is made possible in the heat sink. Since the circuit board is clamped to the heat sink, additional fasteners which pass through the circuit board and / or cohesively with the heat sink connect, be saved. The lighting device is therefore inexpensive to produce.
- the heat coupling surface has a cylindrical curvature, which results in an at least approximately constant contact pressure for the commercially available "rigid" printed circuit boards with a constant thickness, if the printed circuit board is pressed radially at its ends
- the curvature may be a circular-cylindrical curvature or may be deviated from the circular shape, in particular the curvature may have an approximately elliptical or exponential profile overall or in sections, for example, the curved heat-input surface preferably has the shape of a column segment of a column cylindrical or elliptical base.
- the curvature of the flexible board is determined by the light distribution to be achieved. According to the invention, however, the curvature serves only to achieve a uniform contact of the printed circuit board with the heat input surface of the heat sink.
- the printed circuit board is therefore preferably still "virtually flat", ie only minimally curved,
- the change in the tangent angle of the curvature is preferably less than 1 ° / cm, particularly preferably less than 0.5 ° / cm
- such a small curvature is sufficient to ensure a uniform surface contact of the rigid printed circuit board, while at the same time the light distribution is not perceptibly influenced by such a small curvature Clamp circuit board, can then be arranged on the edge of the heat sink.
- the illumination device has an optical system having at least one reflector and / or a lens for guiding the light emitted by the at least one luminous means, and if the printed circuit board is clamped between the optics and the heat sink.
- the lighting device can be inexpensively and easily assembled during its manufacture.
- the tensioned via the connecting elements with the heat sink optics acts as a mechanical spring, which presses the circuit board areally to the heat input surface of the heat sink.
- a good heat-conducting connection between the circuit board and the heat sink is achieved.
- the optics centering elements which cooperate with matching centering counterparts of the circuit board.
- the printed circuit board and the at least one lighting means located thereon are then positioned in the correct position after being mounted on the optics.
- the centering elements are preferably designed as projections and the centering counterparts as matching openings.
- the centering elements are formed as openings and the centering counterparts as matching projections.
- the projections taper from their foot to their free end. As a result, a still simple installation of the lighting device is made possible.
- the centering elements are preferably formed dome-shaped.
- the optics has several Wderderlagerstellen which are arranged in the extension direction of the lamp row behind the other and spaced by gaps, wherein the abutment points come to rest on the circuit board, wherein the lighting means are provided at the intermediate spaces, and wherein the connecting elements are arranged transversely to the extension direction of the lamp row on both sides of the abutment points.
- the optics has a plurality of bridge parts which extend transversely to the row of the lighting means, wherein the abutment points are arranged on the bridge parts at a distance from their bridge ends.
- the circuit board can be even better pressed flat against the heat sink.
- a plurality of lighting means are arranged in a row next to each other on the circuit board, wherein the lighting means are positioned at the height of the most prominent point of the convex curvature.
- FIG. 1 shows a cross section through an illumination device, which has a plurality of light emitting diodes arranged on a printed circuit board as a light source,
- Fig. 2 is a front view of the lighting device
- Fig. 3 is a view of the back of the lighting device.
- a in Fig. 1 as a whole designated 1 lighting device has as a light source 2 a plurality of light-emitting diodes, which are arranged on a printed circuit board 3 in a row next to each other.
- the circuit board 3 extends in the undeflected rest position in a plane.
- the printed circuit board 3 is connected in a heat-conducting manner to a heat sink 4, which consists of a good heat-conducting material, for example aluminum.
- the lighting means 2 are arranged on the front side of the printed circuit board 3. With its rear side facing away from the light sources 2, the printed circuit board 3 lies flat against a heat input surface 5 of the heat sink 4. The heat loss occurring in the bulbs 2 is first transmitted from the bulbs 2 on the circuit board and then through the circuit board and introduced into the heat input surface 5 of the heat sink 4.
- the cooling body 4 has on its side facing away from the heat input surface 5 front cooling fins 6, via which the heat loss is dissipated to the ambient air.
- the heat input surface 5 of the heat sink 4 has a convex, approximately cylindrical curvature, the most prominent point of which is arranged approximately centrally to the printed circuit board 3.
- the cylinder axis of the curvature is normal to the plane in Fig. 1 and extends above the heat sink 4.
- the heat input surface 5 starting from the left edge of the circuit board 3 to the center of the circuit board 3 towards something down and in the further course from the middle to the right edge of the circuit board 3, something upwards.
- the illumination device For directing and bundling the light emitted by the light sources 2, the illumination device has an optical system 7 which has a housing part the plurality, in the drawing, not shown, light-deflecting optical elements are provided which are arranged in the emission of the light emitting means 2.
- FIG. 1 it can be seen that the circuit board 3 is clamped between the optics 7 and the heat sink 4 with the aid of connecting elements 8 such that the optics 7 against the restoring force of its material at a plurality of abutment point 9 spaced apart from one another Front of the circuit board 3 comes to rest and the circuit board 3 is clamped between the optics 7 and the heat sink 4.
- the connecting elements 8 pass through openings of the heat sink and are anchored in the optic 7.
- the connecting elements 8 are arranged next to the printed circuit board 3.
- the connecting elements 8 At their end remote from the optics 7, the connecting elements 8 have a broadening which overlaps the edge area of the passage opening of the heat sink.
- the connecting elements 8 may be screws, for example.
- the abutment points 9 are the most prominent point of the convex cylindrical curvature of the heat input surface 5 opposite. Due to the restoring or spring force of the optics 7, the printed circuit board 3 is pressed flat against the heat input surface 5 with its rear side. This results in a low thermal resistance between the printed circuit board 3 and the heat sink 4 at the heat input surface 5.
- the optic 7 has a plurality of spiked or truncated conical centering elements 10, each of which passes through a matching opening of the printed circuit board 3 (FIG. 1).
- the centering elements 10 are slightly conical and taper, starting from their foot to their free end.
- Fig. 2 it can be seen that the optics 7 has a plurality of juxtaposed abutment points 9, and that adjacent to each adjacent juxtaposed abutment points 9 are each spaced by a gap 11 from each other.
- a respective illuminant is arranged approximately centrally between the abutment points 9 adjoining the intermediate space 11.
- the interspaces 11 are each configured as a wall breakthrough.
- the optics 7 has a plurality of stegfömige bridge parts 12 which extend transversely to the row of lamps and are anchored at their bridge ends of housing edge regions which extend approximately parallel to the row of light sources.
- the abutment points 9 are arranged approximately centrally between the bridge ends.
- the bridge parts 12 have an approximately W-shaped course in the longitudinal direction and are anchored to the ends of the two outer W-legs with the housing edge regions.
- the abutment site 9 is located at the ends of the inner W-legs remote from the outer W-legs.
- the bridge portions 12 between the abutment point 9 and the bridge ends each have a deviating from a straight line course.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Fastening Of Light Sources Or Lamp Holders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011051047.8A DE102011051047B4 (de) | 2011-06-14 | 2011-06-14 | Beleuchtungseinrichtung |
| PCT/EP2012/061232 WO2012171972A2 (de) | 2011-06-14 | 2012-06-13 | Beleuchtungseinrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2721342A2 true EP2721342A2 (de) | 2014-04-23 |
| EP2721342B1 EP2721342B1 (de) | 2015-09-09 |
Family
ID=46275835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP12727372.0A Not-in-force EP2721342B1 (de) | 2011-06-14 | 2012-06-13 | Beleuchtungseinrichtung |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2721342B1 (de) |
| DE (1) | DE102011051047B4 (de) |
| WO (1) | WO2012171972A2 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2918393B1 (de) * | 2014-03-14 | 2021-08-04 | LUNUX Lighting GmbH | Beleuchtungsvorrichtung, Gehäuseschale für eine Beleuchtungsvorrichtung und Herstellungsverfahren für eine Beleuchtungsvorrichtung |
| DE102014109114B4 (de) | 2014-06-30 | 2024-04-25 | HELLA GmbH & Co. KGaA | Anordnung eines Kühlkörpers in einem Scheinwerfer |
| CN106801832A (zh) * | 2016-12-14 | 2017-06-06 | 安徽银盾斯金铝业有限公司 | 一种卡装式led路灯散热器铝型材 |
| DE102020002951A1 (de) * | 2019-06-07 | 2020-12-31 | Marquardt Gmbh | Gerät mit einem Gehäuse |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7182627B1 (en) * | 2006-01-06 | 2007-02-27 | Advanced Thermal Devices, Inc. | High illumosity lighting assembly |
| DE102006048230B4 (de) * | 2006-10-11 | 2012-11-08 | Osram Ag | Leuchtdiodensystem, Verfahren zur Herstellung eines solchen und Hinterleuchtungseinrichtung |
| TWI324669B (en) * | 2007-03-15 | 2010-05-11 | Ind Tech Res Inst | Light modules |
| DE102007050893B4 (de) * | 2007-10-24 | 2011-06-01 | Continental Automotive Gmbh | Verfahren zum Positionieren und Montieren einer LED-Baueinheit sowie Positionierkörper hierfür |
| EP2269429B1 (de) * | 2008-04-17 | 2011-11-02 | Koninklijke Philips Electronics N.V. | Wärmeleitendes montageelement zur anbringung einer bestückten leiterplatte an einem kühlkörper |
| DE202008005814U1 (de) * | 2008-04-30 | 2008-08-07 | Kracht, Torsten | Dreh- und schwenkbare Lampeneinheit |
| DE102008052869B4 (de) * | 2008-09-15 | 2014-06-26 | Siteco Beleuchtungstechnik Gmbh | Leuchte mit LED-Tragschiene |
| DE202009001475U1 (de) | 2009-02-06 | 2009-04-16 | Osram Gesellschaft mit beschränkter Haftung | Kühlkörper für eine Leuchtvorrichtung |
| TW201100711A (en) * | 2009-06-30 | 2011-01-01 | Power Light Tech Co Ltd | Light emitting diode light source assembly with heat dissipation base |
-
2011
- 2011-06-14 DE DE102011051047.8A patent/DE102011051047B4/de not_active Expired - Fee Related
-
2012
- 2012-06-13 WO PCT/EP2012/061232 patent/WO2012171972A2/de not_active Ceased
- 2012-06-13 EP EP12727372.0A patent/EP2721342B1/de not_active Not-in-force
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012171972A3 (de) | 2013-04-04 |
| WO2012171972A2 (de) | 2012-12-20 |
| DE102011051047B4 (de) | 2015-06-18 |
| DE102011051047A1 (de) | 2012-12-20 |
| EP2721342B1 (de) | 2015-09-09 |
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