EP2270387A1 - Lampe plate à DEL - Google Patents

Lampe plate à DEL Download PDF

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Publication number
EP2270387A1
EP2270387A1 EP09164475A EP09164475A EP2270387A1 EP 2270387 A1 EP2270387 A1 EP 2270387A1 EP 09164475 A EP09164475 A EP 09164475A EP 09164475 A EP09164475 A EP 09164475A EP 2270387 A1 EP2270387 A1 EP 2270387A1
Authority
EP
European Patent Office
Prior art keywords
leds
flat lamp
led
light
predetermined value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09164475A
Other languages
German (de)
English (en)
Other versions
EP2270387B1 (fr
Inventor
Hagn Josef
Joachim Maier
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.)
Hagn-Leone GmbH
Original Assignee
Hagn-Leone GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Hagn-Leone GmbH filed Critical Hagn-Leone GmbH
Priority to EP09164475A priority Critical patent/EP2270387B1/fr
Priority to AT09164475T priority patent/ATE525612T1/de
Priority to PCT/EP2010/003949 priority patent/WO2011000554A1/fr
Publication of EP2270387A1 publication Critical patent/EP2270387A1/fr
Application granted granted Critical
Publication of EP2270387B1 publication Critical patent/EP2270387B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the invention relates to a flat lamp comprising a luminous means with LEDs arranged on a printed circuit board and a housing for accommodating the luminous means.
  • Fluorescent tubes have the disadvantage of a comparatively low color temperature, as well as a limitation of the minimum height due to the size of the fluorescent tubes.
  • LED-based machine lights are known, which simulate the principle of a fluorescent lamp, for example, by 4-8 high-power LEDs are arranged in a row.
  • LED-equipped lighting fixtures have the advantage that LEDs are usually shock- and vibration resistant, circuit compatible and easily modulated in their emitted radiation.
  • punctiform light sources such a luminaire does not lead to a uniform illumination of the room and thus to disturbing glare effects and shadowing.
  • Another disadvantage is the low light intensity and the specification of the minimum height of the luminaire through the thickness of the high-power LEDs.
  • Out DE 197 47 980 A1 is an LED-based lighting fixture for wet rooms known. The arrangement of the LEDs in this fixture also leads to glare and shadowing and not to a sufficiently uniform illumination as is required for many industrial applications.
  • the flat lamp comprises a lighting means and a housing for receiving the lighting means.
  • the overall height of the flat lamp in the direction of radiation can be less than 30 mm.
  • the luminous means comprises LEDs arranged on a printed circuit board with an arrangement density of at least 1 LED per 2.5 cm 2 over an area of at least 250 cm 2 . Due to the high arrangement density according to the invention over a minimum area of 250 cm 2 , the LEDs form a luminous surface, ie a surface luminous body based on punctiform LED light sources.
  • the inventors have observed in the development of the flat lamp according to the invention the surprising effect that at an arrangement density of min. 1 LED per 2.5 cm 2 irregularities in the perceptible light distribution can be reliably avoided despite the "point-shaped" LED light sources.
  • An arrangement density of the LEDs of at least 1 LED per 1.75 cm 2 is particularly advantageous. It is therefore a particular aspect of the present invention to produce planar light despite the use of point LED-based light sources.
  • planar light in the context of this invention corresponds to a light or with respect to the light distribution very close to a light that is generated by a conventional surface light body.
  • surface light body is understood in the relevant art to mean a body having a uniformly light-emitting luminous area, the thickness of which is small in comparison to the length and width dimensions.
  • the emitted light of a surface luminaire compared to the light of a filament with point light sources produces less glare and shadowing, as the light distribution distributed by the flat luminous body spatially evenly is.
  • the LED luminous element according to the invention represents a surface luminous element in this sense, since it has the same advantageous illumination properties with regard to glare effects and shadowing.
  • the luminous element according to the invention thus combines the advantageous light distribution of a surface luminous body with the advantageous properties one on LED-based filament.
  • the inventive high total number of LEDs used allows a sufficiently high light intensity.
  • the bulbs of the flats consist of individual LEDs whose forward voltage does not exceed a deviation of +/- 5% by a predetermined value. It is particularly advantageous if the variation width of the forward voltage does not exceed a value of 3.5% by a predetermined value. This is due to the surprising finding in the course of the development that brightness differences and the resulting shadowing in the luminous area can be avoided by observing previously determined tolerances in the LED forward voltage. In addition, a significantly increased lifetime of the LEDs was observed. Investigations by the inventors after realization of the invention have found that customary tolerances of the LEDs used far exceed these fluctuation ranges.
  • the predetermined value of the forward voltage is in the range 2.7-3.7 volts. A higher fluctuation range of the forward voltage, in combination with the planar arrangement density of at least 1 LED per 2.5 cm 2 according to the invention, leads to significant temperature and brightness differences, which increase further with increasing operating time of the luminaire.
  • the flat lamp has a light source with a passive LED drive.
  • the passive LED drive can be realized by resistors connected in series to the LED, thereby defining the current flow through the LEDs. This allows a very cost-effective implementation of the bulb.
  • the flat lamp can also include an active control of the individual LEDs. This has the advantage that in order to comply with small tolerances of the LED forward voltage no preselection of the LEDs used is needed, but this can be realized by an active control circuit.
  • the LEDs of the surface illuminant according to the invention are selected such that the fluctuation of the color temperature of the LEDs does not exceed a value of +/- 15% of a predetermined value.
  • a value of +/- 15% of a predetermined value is based on the statement in the context of the invention that the customary manufacturing tolerances with respect to color temperature and light intensity in combination with the dense arrangement of many individual LEDs according to the invention to shade, especially color shadows, can lead in the surface light.
  • a fluctuation range of the color temperature of less than +/- 10% by a predetermined value.
  • the predetermined value of the color temperature is in the range 6000-7500 ° Kelvin.
  • the light source can comprise LEDs whose fluctuation of the intensity of the LEDs does not exceed a value of +/- 20% by a predetermined value. Particularly advantageous is a fluctuation range of less than +/- 15% by a predetermined value.
  • the fluctuation ranges of the luminous intensity of commercially available LEDs is +/- 45% by a predetermined value.
  • the predetermined value of the light intensity is in the range of 1000 - 1300 mcd.
  • the LEDs mounted on the surface illuminant are preferably designed as surface-mount LEDs (SMD LEDs) without an outstanding lens part.
  • SMD LEDs surface-mount LEDs
  • Radial LEDs have a protruding lens portion where the emergent light is refracted. For lights with few LEDs, these effects are usually imperceptible.
  • the high number of densely arranged LEDs according to the invention leads to dark perceptible "light spots" on the surface illuminant in the case of radial LEDs.
  • the refraction of light on the protruding lens part also produces a warmer light with a higher proportion of yellow and red frequencies.
  • the SMD LED emitted light which is colder compared to the use of radial LEDs, is particularly advantageous for applications in dark, oily machining areas, as these spaces better reflect cold light compared to warmer light.
  • SMD LEDs generally have two planar bearing surfaces, by means of which the LED is mounted directly on a thermally conductive surface of the circuit board, preferably provided with thermal pads, whereby the resulting heat of the LED can be derived.
  • Radial LEDs are typically mounted on a printed circuit board, with the legs of the LEDs plugged in through the printed circuit board print and soldered from the back. As a result, they can be cooled only with difficulty.
  • individual LEDs with a power less than 120 mW per LED are used for the luminous means according to the invention. Due to the large number of individual LEDs used produces a sufficiently high light intensity, at the same time too high heat radiation is prevented in the emission direction. LEDs with a power ⁇ 120 mW are very cost-effective and due to their compact design compared to expensive high-performance LEDs for a low-profile flat luminaire.
  • the present invention enables a low-cost flat luminaire with an LED-based surface illuminant, which produces shadow-rich, blinding and stain-poor, high-contrast light with high color temperature and luminous intensity.
  • the LED-based flat light according to the invention allows instead a variety of low-cost and relatively low-power LEDs use.
  • a surface luminous element is realized by means of individual LEDs, which avoids the otherwise usual shadowing and irregularities in the luminous area when using "point-shaped" light sources (LEDs) and thus a Flat LED-based light enables the high requirements in industrial applications.
  • the outer dimensions of in Fig. 1 shown flat lamp amount to 771 x 171 x 28mm with a thickness of the illuminant of 3.5 mm.
  • the flat lamp thus has a height of 28 mm in the emission direction.
  • FIG. 1 schematically shows a frame member with lamp mounted therein and an outer cover of the flat lamp according to an embodiment of the present invention.
  • the frame element has a lateral angle section 41.
  • the LED illuminant 30 rests on a lower surface of the angle section 41 and is fixed there with fastening means.
  • the frame member 10 has a circular recess for receiving the cables from the cable connection 34.
  • Fig. 3 shows a plan view of the surface illuminant 30.
  • the surface illuminant 30 includes a rectangular FR4 circuit board 32 on the 952 LEDs 31 are attached.
  • the outer dimensions of the Fig. 3 shown PCB are 700 x 138 mm.
  • the LEDs 31 are alternately arranged in rows of 8 and 9 perpendicular to the longitudinal direction of the circuit board with the row of LEDs 8 row parallel to the row of LEDs 9, so that one row 8 LED is equidistant from the next two LEDs of the following row 9 Series has.
  • the LEDs are mounted at a distance of 1.3 cm on the circuit board, which corresponds to an arrangement density of 1 LED per 1.68 cm 2 .
  • the LEDs 31 are mounted via two contact surfaces of the LED underside by Printmontage directly to a thermally conductive surface of the circuit board, preferably provided with thermal pads attached.
  • the flat lamp according to the invention knows a max. Surface temperature in the range of 55 ° C at 25 ° C ambient temperature.
  • the LED flat light according to the invention produces a light output in the range of 27,000 Lx per dm 2 at a distance of 15 cm and has a luminous area of approximately 7.6 dm 2 .
  • each 136 resistors 33 are soldered in a line perpendicular to the LED 8 and 9 rows.
  • LEDs and two resistors 33 are connected in series.
  • a cable connection 34 is soldered to the power supply.
  • two holes 37 are provided for fastening means to secure the circuit board to the frame member 10.
  • the inventors have determined in experimental series that the inventive high arrangement density of the 952 LEDs of 1 LED per 1.68 cm 2 at market Tolerances of the LEDs with respect to the forward voltage, the color temperature and the light intensity leads to disturbing shadows and light spots. Therefore, only specially preselected LEDs are installed for the surface illuminant according to the invention in the embodiment with a passive LED control, which has a very narrow fluctuation range with respect to the forward voltage (+/- 0.1 V at a mean forward voltage of 3.1 V), the color temperature (+ /. 500 ° K by a predetermined value of 6500 ° K) and the luminous intensity (+/- 150 mcd at a predetermined value of 1150 mcd).
  • circuit board fastener 35 for mounting the circuit board on the frame member 10.
  • Some of these fasteners are pronounced as bolts, which both secure the circuit board to the frame member and serve as a spacer for resting the outer cover 12.
  • Fig. 4 shows a control circuit according to an embodiment of the invention.
  • Fig. 4 shows 2 LED strands 41 of the surface illuminant according to the invention (the remaining identically switched LED strands are not shown).
  • the arranged on the circuit board 32 LEDs 31 are summarized according to this embodiment to LED strands with 6 series-connected LEDs, wherein at the beginning and end of the strand in each case a resistor 33 is connected in series. All LED strings 41 consisting of 6 LEDs and 2 resistors are connected in parallel.
  • a voltage of 24 V which is applied to each of the parallel-connected LED strands 14 At each of the identical LEDs falls a forward voltage of 3.1 V with a tolerance of +/- 0.1 V and at each Resistor a voltage of 0.8V.
  • the resistors connected in series in the LEDs determine the current flow through the diodes through the resistance variable and the applied voltage and thus form the passive control of the luminous means.
  • Fig. 5a shows a view from the direction of emission of the LEDs used.
  • SMD Surface Mounted
  • the LEDs used are used in a PLCC 2 package. The light is emitted via a circular opening 52 which has no outstanding lens part with a beam angle of 120 degrees. As a result, disruptive refraction effects are avoided.
  • the recess 53 indicates the polarization in the forward direction.
  • the LEDs used emit white light at a power of 62 mW per LED.
  • the LEDs used have a length of 3.5 mm and a width of 2.8 mm.
  • the LEDs 31 mounted on the circuit board have a forward voltage of 3.1 V, and a tolerance range (forward voltage fluctuation range) of +/- 0.1 V.
  • the LEDs used have a luminous intensity in the range of 1000 ⁇ 1300 mcd, and thus a tolerance range of altogether 300 mcd. Furthermore, the LEDs used have a color tolerance of about +/- 500 ° K around the range of 6500 ° K.
  • Fig. 5b shows a side view of the LEDs used which have a height of 1.9 mm.
  • Fig. 5c shows a bottom view of the LED in the direction of radiation.
  • the foot surfaces 54 are mounted directly on a thermally conductive surface of the circuit board.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
EP09164475A 2009-07-02 2009-07-02 Lampe plate à DEL Active EP2270387B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP09164475A EP2270387B1 (fr) 2009-07-02 2009-07-02 Lampe plate à DEL
AT09164475T ATE525612T1 (de) 2009-07-02 2009-07-02 Led flachleuchte
PCT/EP2010/003949 WO2011000554A1 (fr) 2009-07-02 2010-07-02 Elément lumineux led et luminaire plat led

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09164475A EP2270387B1 (fr) 2009-07-02 2009-07-02 Lampe plate à DEL

Publications (2)

Publication Number Publication Date
EP2270387A1 true EP2270387A1 (fr) 2011-01-05
EP2270387B1 EP2270387B1 (fr) 2011-09-21

Family

ID=41693164

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09164475A Active EP2270387B1 (fr) 2009-07-02 2009-07-02 Lampe plate à DEL

Country Status (3)

Country Link
EP (1) EP2270387B1 (fr)
AT (1) ATE525612T1 (fr)
WO (1) WO2011000554A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011002769U1 (de) 2011-02-15 2011-04-28 Hagn_Leone Gmbh Flachleuchte und Gehäuse für eine Flachleuchte
DE102011082533A1 (de) 2011-09-12 2013-03-14 Hagn_Leone Gmbh LED-Flachleuchte und Reflektor für eine LED-Flachleuchte
WO2015197387A1 (fr) * 2014-06-23 2015-12-30 Koninklijke Philips N.V. Source de lumière à del
CN106023844A (zh) * 2016-06-16 2016-10-12 合肥嫩芽科技有限公司 一种广告箱内led灯
US9664365B2 (en) 2011-05-17 2017-05-30 Pixi Lighting, Inc. Flat panel lighting device
US10215911B2 (en) 2013-04-17 2019-02-26 Unity Opto Technology Co., Ltd. Lighting assembly
US10352544B2 (en) 2013-04-17 2019-07-16 Unity Opto Technology Co., Ltd. Field-serviceable flat panel lighting device
US10386023B2 (en) 2013-04-17 2019-08-20 Unity Opto Technology Co., Ltd. LED light fixture and assembly method therefor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9557022B2 (en) 2015-04-30 2017-01-31 Ever Venture Solutions, Inc. Non-round retrofit recessed LED lighting fixture

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747980A1 (de) 1997-10-30 1999-05-06 Wts Kereskedelmi Es Szolgaltat Beleuchtungskörper für Schwimmbäder und ähnliches
DE19917401A1 (de) * 1999-04-16 2000-10-26 Hauke Haller Beleuchtungskörper
EP1081426A2 (fr) * 1999-09-02 2001-03-07 Dinnebier Licht GmbH Elément d' éclairage avec une structure porteuse de montage, un couvercle et une source lumineuse
DE102008013589A1 (de) * 2007-11-30 2009-06-04 Osram Opto Semiconductors Gmbh Beleuchtung eines Aquariums

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2329053A1 (fr) 1998-05-28 1999-12-02 Incyte Pharmaceuticals, Inc. Proteines socs humaines
US6891200B2 (en) * 2001-01-25 2005-05-10 Matsushita Electric Industrial Co., Ltd. Light-emitting unit, light-emitting unit assembly, and lighting apparatus produced using a plurality of light-emitting units
TW567619B (en) * 2001-08-09 2003-12-21 Matsushita Electric Ind Co Ltd LED lighting apparatus and card-type LED light source

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19747980A1 (de) 1997-10-30 1999-05-06 Wts Kereskedelmi Es Szolgaltat Beleuchtungskörper für Schwimmbäder und ähnliches
DE19917401A1 (de) * 1999-04-16 2000-10-26 Hauke Haller Beleuchtungskörper
EP1081426A2 (fr) * 1999-09-02 2001-03-07 Dinnebier Licht GmbH Elément d' éclairage avec une structure porteuse de montage, un couvercle et une source lumineuse
DE102008013589A1 (de) * 2007-11-30 2009-06-04 Osram Opto Semiconductors Gmbh Beleuchtung eines Aquariums

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011002769U1 (de) 2011-02-15 2011-04-28 Hagn_Leone Gmbh Flachleuchte und Gehäuse für eine Flachleuchte
US9664365B2 (en) 2011-05-17 2017-05-30 Pixi Lighting, Inc. Flat panel lighting device
US9976732B2 (en) 2011-05-17 2018-05-22 Unity Opto Technology Co., Ltd. Flat panel lighting device and driving circuitry
US10364974B2 (en) 2011-05-17 2019-07-30 Unity Opto Technology Co., Ltd. Flat panel lighting device and driving circuitry
US10422518B2 (en) 2011-05-17 2019-09-24 Unity Opto Technology Co., Ltd. Flat panel lighting device
DE102011082533A1 (de) 2011-09-12 2013-03-14 Hagn_Leone Gmbh LED-Flachleuchte und Reflektor für eine LED-Flachleuchte
US10215911B2 (en) 2013-04-17 2019-02-26 Unity Opto Technology Co., Ltd. Lighting assembly
US10352544B2 (en) 2013-04-17 2019-07-16 Unity Opto Technology Co., Ltd. Field-serviceable flat panel lighting device
US10386023B2 (en) 2013-04-17 2019-08-20 Unity Opto Technology Co., Ltd. LED light fixture and assembly method therefor
WO2015197387A1 (fr) * 2014-06-23 2015-12-30 Koninklijke Philips N.V. Source de lumière à del
CN106023844A (zh) * 2016-06-16 2016-10-12 合肥嫩芽科技有限公司 一种广告箱内led灯

Also Published As

Publication number Publication date
ATE525612T1 (de) 2011-10-15
EP2270387B1 (fr) 2011-09-21
WO2011000554A1 (fr) 2011-01-06

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