EP2593712A2 - Phare pour éolienne - Google Patents

Phare pour éolienne

Info

Publication number
EP2593712A2
EP2593712A2 EP11817261.8A EP11817261A EP2593712A2 EP 2593712 A2 EP2593712 A2 EP 2593712A2 EP 11817261 A EP11817261 A EP 11817261A EP 2593712 A2 EP2593712 A2 EP 2593712A2
Authority
EP
European Patent Office
Prior art keywords
led units
leds
led
different
beacon according
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.)
Withdrawn
Application number
EP11817261.8A
Other languages
German (de)
English (en)
Inventor
Lars Hohaus
Vincent Kessler
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.)
Quantec Networks GmbH
Original Assignee
Quantec Networks 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
Application filed by Quantec Networks GmbH filed Critical Quantec Networks GmbH
Publication of EP2593712A2 publication Critical patent/EP2593712A2/fr
Withdrawn legal-status Critical Current

Links

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
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/045—Refractors for light sources of lens shape the lens having discontinuous faces, e.g. Fresnel lenses
    • 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
    • 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
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • 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
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/06—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for aircraft runways or the like
    • 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
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • 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 beacon which can be used as obstruction lighting, in particular on a windmill or, for example, on a windmill. a tall rack or tall building can be attached. Such a beacon can thus emit light as a warning to flying objects.
  • beacons are governed by different national or international standards, such as: B. the ICAO Annex 14 set.
  • B. the ICAO Annex 14 set are fire with different color values, eg. As white or red, set different flashing frequencies and intensity distributions.
  • the intensity distributions can furthermore be defined by lower and upper limit values in the horizontal plane and for different vertical deviation angles with respect to the horizontal plane, in order to ensure sufficient intensities for obstacle detection and, secondly, excessive glare of e.g. B. surrounding buildings or people in a vicinity to avoid.
  • DE 10 2007 009 896 B4 describes a beacon with a plurality of arranged on a circle and radially outwardly directed LEDs (LEDs).
  • the plurality of LEDs is associated with a common Fresnel lens which is circumferentially provided circumferentially and concentric with the LED array.
  • Ancillary lenses are arranged in front of the individual LEDs in order to direct the light from the LEDs to the Fresnel lens so that the LEDs assume a radially inwardly offset virtual image with respect to the Fresnel lens, which is also opposite the focus of the Fresnel lens. Lens is offset.
  • the DE 20219037 U1 describes a beacon with multiple LEDs.
  • LEDs can be compared to previous bulbs, such as halogen lights, a significant Stromerspam is achieved.
  • the optical properties of the LEDs can be modified accordingly.
  • beacons are generally only suitable for specific types of fire.
  • DE 202007 005 003 U1 describes a beacon in which a plurality of light sources are arranged in different Lichtabstraariaen, wherein the different levels are formed by LEDs of different colors.
  • the several Lichtabstraariaen each own lens elements are assigned, whose transitions are separated by aperture rings.
  • beacons are common practice for the formation of different fire types.
  • the different light emission levels are switched on and the respective non-relevant light emission levels are switched off.
  • the Lichtabstralander parallel to each other and are arranged one above the other.
  • a plurality of light-emitting levels for white LEDs and a light-emitting level for red LEDs are arranged one above the other.
  • the complex wiring is generally done by additional wiring boxes that are mounted outside the light assembly.
  • Lamps such as DE 100 59 844 A1 are multicolor traffic lights with different colored LEDs known to output different colors without further optical alignment of the light radiation by optical means, etc.
  • the invention has for its object to provide a beacon that can be formed with little effort and used for different fire types.
  • different LED units are arranged alternately in the circumferential direction, preferably in a common horizontal plane.
  • the various LED units differ at least in their spectral composition, in particular, they can represent white and red LED units or spend alternately white and red light.
  • the different LED units can be controlled separately, in particular, the first LED units can be controlled together and accordingly the second LED units are controlled together.
  • more than two different LED units can be arranged alternately in the circumferential direction.
  • the alternating arrangement may be strictly alternating, i. subsequently
  • first LED unit - second LED unit - first LED unit - .. etc In principle, however, deviations from this strict consequence may also exist with other periodic arrangements; It is relevant that in the different directions of the horizontal plane, a superimposition of the light cones of each of the first LED units and each of the second LED units occurs in such a way that the desired or required light intensities result.
  • the individual LED units can each be formed by a single LED, z. B. a white LED for white light.
  • an LED unit can also have a plurality of individual LEDs, which are arranged next to one another and also vertically above one another. These LEDs of a common LED unit can in particular be arranged with the same radius or distance from the common linear lens and thus be arranged compactly next to each other. Compared to the formation of a plurality of vertical LED rows, which each extend circumferentially around the support structure, this can be done on the one hand a much more compact training.
  • multiple LED's may share a common LED unit, i. with common, circumferential linear lens, which has only a single focus ring, reaches different luminous intensity distributions with different control and thus different fire types are formed. These differences may be in the luminous intensity in the horizontal direction, and also in the vertical luminous intensity distribution, i. the luminous intensity distributions at vertical angles to the horizontal plane.
  • Plane are arranged and other LEDs vertically offset this something.
  • the vertically offset LEDs thus contribute more to light intensity distributions at an angle to the horizontal plane.
  • a desired light intensity distribution in the vertical direction can thus be formed by superimposing LEDs at different distances from the horizontal plane. Due to the separate controllability and different energization of the individual LEDs of an LED unit thus different emission characteristics can be achieved with high variability and high accuracy.
  • the linear lens is preferably a linear Fresnel lens. Its focus ring is concentric with the axis of symmetry.
  • the different LED units may, according to a particularly advantageous embodiment, differ not only in their spectral composition but also in a further parameter.
  • this parameter can be a different defocusing, which can be formed in particular by a different distance from the common lens. It is recognized that due to the different defocusing, a common circumferential lens can be used for different vertical light intensity distributions and thus different types of fire.
  • the different radial distances can be formed, for example, by forming vertical ribs or projections and grooves, which extend alternately in the circumferential direction of the support structure.
  • support elements of the individual LEDs can be formed differently thick or stacked on a cylindrical surface, so that the support structure is in several parts with the cylindrical body and the attached support elements, for.
  • the formation of radial grooves and However, projections in a one-piece support structure results in a higher manufacturing accuracy and the possibility that they each have a flat surface and thus the boards or support elements of the LED units can be applied as planar elements surface and thus clearly positioned.
  • a metal cylinder can be milled suitable.
  • z. B. also a multi-part support structure can be used.
  • a different defocusing can also be achieved by attachment optics in front of individual LED units, z. B. only in front of the first or second LED units.
  • the radial offset or the different radial distances can be omitted.
  • the circumferentially alternating training in particular alternately both in the spectral composition as well as in the different defocusing, synergistically complemented with the formation of one of the two LED units with a plurality of vertically offset individual LEDs.
  • This combination takes into account in a special way that the different fire types also require different vertical light intensity distributions, sometimes with upper and lower limits.
  • These particular requirements may be met by a single linear lens, i. with a single focus ring, can be achieved in a particularly advantageous manner by combining the different defocusing with the vertical offset.
  • the support structure may in particular be a support tube or a cylindrical inner housing.
  • This support tube can also be used to connect the cover and floor, between which the Fresnel lens is received. men is.
  • a transparent tube of z As plastic or glass to seal against the outside space may be provided, wherein the transparent tube may be provided outside the Fresnel lens and the metal cylinder, in particular directly outside the Fresnel lens. This results in a compact, narrow-building, preferably cylindrical block.
  • the electronic control device (s) may be used e.g. be provided on the cover or bottom on a circuit board or other circuit board, so that this compact unit can be connected directly to a power supply.
  • the circuit carrier can be z. B. extend over the entire cross section of the bottom or lid, so that short cable paths to the LED units are possible.
  • the control device by several components or individual, cooperating control devices, for. B. two control devices for the different colored, LEDs are formed.
  • the various LED units and in particular also individual LEDs within the LED units can be advantageously controlled by separate channels.
  • the control can be carried out in particular via PWM (pulse width modulation), as this different light intensities can be formed without polarity change.
  • PWM pulse width modulation
  • the pulse rate of the PWM is not significant for a beacon.
  • the typical clock rates of PWM are significantly higher or higher-frequency than the flashing frequencies, the z. B. lie in the Hertz range.
  • the linear lens preferably has a single focus ring or an annular focus, which runs concentrically to the axis of symmetry of the beacon.
  • the linear lens extends annularly completely circumferentially around the support structure in the circumferential direction and the beacon preferably emits light in 360 ° of the horizontal plane; if necessary, a part of the LEDs can be switched off, for. B. at corners of a wind field or buildings.
  • FIG. 1 shows a beacon according to an embodiment of the invention in cross-section or axial section
  • Fig. 2 is a side view of the beacon
  • 3 is a perspective view of the beacon.
  • 5 is a highly schematic representation of the vertical emission angle of the beacon.
  • Fig. 7 is a side view of the inner cylinder with adjacent
  • Fig. 8 is a graph of the luminous intensity distribution versus the vertical angle for an example of a fire fire W Red-ES);
  • ICAO Annex 14 medium power type A; the vertical intensity distribution for a red fire according to ICAO Annex 14, medium type B or type C.
  • a beacon 1 serves as obstacle lighting and may be e.g. be mounted on a windmill.
  • the beacon 1 has a substantially cylindrical inner casing 2 of preferably metal, e.g. Aluminum, a lid 3 fixed on the inner casing 2 of e.g. Aluminum, and a base 4 fixed to the underside of the inner casing 2 of e.g. Aluminum on.
  • the inner housing 2 has an axis of symmetry A and surrounds a housing interior 5.
  • a linear Fresnel lens 7 is circumferentially arranged circumferentially about the axis of symmetry A.
  • Fresnel lens 7 is thus arranged concentrically to the inner housing 2.
  • the Fresnel lens 7 is attached to the lid 3 and the bottom 4.
  • a gap 8 is formed between the inner housing 2 and the Fresnel lens 7, wherein the gap 8 is connected to the inner space 5 and can pass into these and thus there is a pressure equalization between them. Up and down the space 8 is limited by the lid 3 and the bottom 4.
  • between the interior 5 and the beacon 1 surrounding outer space allows pressure equalization, z. B. via a membrane.
  • Radially outside the Fresnel lens 7 can advantageously be a tube 6 made of transparent plastic, z. As acrylic glass, or glass as a transparent cover and sealing against the outside space to be arranged circumferentially.
  • the linear Fresnel lens 7 may be made of an acrylic glass or transparent
  • LED units 10, 12 are mounted on the outer circumference of the inner housing 2 .
  • the LED units 10, 12 are distributed in the circumferential direction and regularly spaced from each other.
  • two different LED units namely a white LED 10 as a first LED unit and a red LED array 12 as a second LED unit are arranged alternately in the circumferential direction and advantageously substantially on a common horizontal plane H through the axis A.
  • FIG. 1 by way of example, two white LEDs 10 are shown, in FIG. 4 by way of example some of the white LEDs 10 and red LED arrangements 12. An alternating, uniformly spaced arrangement results in the circumferential direction.
  • each white LED 0 and each red LED array 12 may each be assigned a segment in the horizontal plane H.
  • the LED units 10 and 12 radiate over a larger angular range in the horizontal direction, so that there is a superimposition of the respective luminous LED units 10 or 12 to the outside.
  • the LED units 10 and 12 may differ in different parameters or even a combination of different parameters.
  • the frequency spectrum is different: the white LEDs 10 emit white or broadband light over a larger wavelength range.
  • the red LED arrays 12 comprise, for example, according to Fig. 7 a plurality of individual red LEDs, according to the illustrated embodiment six LEDs 14a, 14b, 14c, 14d, 14e 14f t.
  • the red LEDs 14c and 14d are mounted in the center, and thus substantially on the horizontal plane H with the white LEDs 0, the vertically adjacent red LEDs 14b, 14e and the outer LEDs 14a, 14f respectively vertically and axially offset therefrom at intervals rd1 and rd2 from the horizontal plane H.
  • a single Fresnel lens 7 with a single focus ring 9 is provided.
  • the position or radius of the focus ring 9 in FIGS. 1 and 4 is purely exemplary in this case.
  • the inner housing 2 is formed on its outside with axially extending projections 16 and grooves 18.
  • the projections 16 and grooves 8 thus extend parallel and in the axial direction A.
  • the white LEDs 10 are arranged on the projections 16, the red LED arrangements 12 in the grooves 18.
  • the radial distances R1 of the white LEDs 10 to the axis A are slightly larger than the radial distances R2 of the red
  • the spacings d1 of the white LEDs 10 with respect to the Fresnel lens 7 are slightly smaller than the distances d2 of the red LED arrays 12.
  • different defocusing of the different LED units 10 and 12 can be achieved To achieve desired optical properties, in particular to allow a desired vertical fanning.
  • the grooves 18 and projections 16 allow this larger and more accurate differences in the radii as z. B. glued carrier platelets.
  • the projections 16 and grooves 18 can advantageously with planner
  • Outer surface may be formed to receive the LED carriers 20 and 22 of the white LEDs 10 and red LEDs 14a to 14f each surface.
  • the LEDs can-in a manner known per se-each be designed as die or semi-conductor die having a spreader 23, 24 influencing the optics on the LED carrier 20 or 22, with supplementary connection contacts and optionally also already a drive circuit.
  • the white LEDs 10 may have, for example, luminous surfaces of 3 ⁇ 3 mm 2 at 0.9 mm in height, for example at a dominant wavelength of 550 nm. They may in principle be designed as pure surface radiators, wherein their spreader 23 already determines a certain focus, which is further determined by the optical properties of the Fresnel lens 7.
  • the red LEDs 14a to 14f may each have luminous surfaces of 1x1 mm 2 area at a height of 0.6 mm, their dominant wavelength being, for example, 617 nm.
  • the Fresnel lens 7 common to the LED units 10 and 12 is linear, i. it has in known manner in the axial direction A (vertical direction) on a plurality of lens sections with different curvature, which thus optically emulate a larger lens or thicker-bodied lens, in particular a thicker convex plan lens.
  • the single focus ring 9 of the Fresnel lens 7 is coaxial with the axis of symmetry A and lies in the horizontal plane H.
  • the plan side of the Fresnel lens 7 is inside and the structured side outside.
  • the construction height and thus aperture of the Fresnel lens 7 is e.g. 110 mm.
  • the transparent tube 6 may e.g. an outer radius of 170 mm at e.g. have a thickness 5.
  • forty-eight LED units 10, 12 may be arranged, ie, twenty-four white LEDs 10 each and twenty-four red LED arrays 12, so that each LED unit 10 or 12 corresponds to a segment of 7.5 °.
  • the white LEDs 10 and the red LED arrays 12 may be energized independently and with different patterns, three types of fire being shown in FIGS. 8-10.
  • the light intensity L, unit Candela cd is plotted as a function of the vertical emission angle V (in degrees or °), that is to say in accordance with FIG. 5 the angle with respect to H.
  • Fig. 8 shows the light intensity distribution Fire-W-Red-ES (FWR-ES) for red flashing fire, which represents red flashing light at a power of 150 cd in the horizontal H.
  • FWR-ES light intensity distribution
  • ES stands for extended specification
  • a narrow band results, which is defined by the upper, in the diagram substantially trapezoidal boundary og and the lower limit ug and for each vertical angle value only a relatively narrow band of eg about 85 cd, at even higher angles above 10 ° or below minus 10 ° even lower.
  • These narrow standards are also achieved.
  • all six LEDs 14a to 14f of the red LED arrangement 12 are actuated, without driving the white LEDs 10, e.g. in the following control:
  • the limit values are shown as bars.
  • ICAO, Annex 14, Medium Power Type C can also be used
  • the vertical luminous intensity distribution according to Fig. 8 and Fig. 10 is thus determined by first the vertical arrangement of the individual red LEDs 14a to 14f, i. in particular also the vertical distances rd1 of the red LEDs 14b, 14e and the vertical distances rd2 of the red LEDs 14a, 14f, furthermore by the spreader 24 of the red LEDs 14a to 14f, the radial distance d2 of the entire red LED array 12 from the Fresnel Lens 7 and the optical properties of the Fresnel lens. 7
  • LEDs 14a to 14f of an LED array 12 are energized differently can, furthermore, the radii R1, R2 and distances d1, d2 to the common Fresnel lens 7, as well as the spectral distribution or pitch lengths.
  • additional optics can be placed on the LEDs 10 and / or 14a to 14f, whereby the different defocusing can be achieved.
  • cooling fins 31, 32 are advantageously formed, which, however, have no supporting functions in the embodiment shown.
  • the light 30 emitted by the right-hand white LED 10 is drawn.
  • the Fresnel lens acts 7.
  • the inner surfaces 26, 27 on the underside of the lid 3 and the top of the bottom 4 are advantageously coated with a Fichtabsorb Schlden material, so as not to influence the radiation characteristics.
  • a controller 33 is e.g. formed by a circuit substrate, in particular a printed circuit board with recorded components and is used to control the LED units 10 and 12.
  • the control device 33 may in particular be attached to the bottom 4 or 3 on the lid.
  • the controller 33 extends substantially over the entire cross-section, i. via the housing interior 5 and the gap 8, so that the lines for contacting the LED units 10, 12 are short.
  • the Bestro- mung for the different types of fire are stored.
  • control device 33 does not circulating all white or red LED units 10 and 12 controls, but only within an angle less than 360 ° in the horizontal plane H, z. B. for corner positions in a wind turbine field.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)

Abstract

L'invention concerne un phare (1), notamment pour une éolienne, ce phare (1) comportant au moins une structure porteuse (2) comprenant plusieurs unités LED (10, 12), disposées dans le sens périphérique et orientées vers l'extérieur, et une lentille (7) linéaire disposée radialement à l'extérieur des unités LED (10, 12) et s'étendant dans le sens périphérique pour focaliser la lumière émise par les multiples unités LED (10, 12), la lentille (7) linéaire étant prévue pour l'ensemble des unités LED (10, 12). Selon l'invention, deux unités LED (10, 12) différentes ou plus sont disposées sur la structure porteuse (2) en alternance dans le sens périphérique, la lumière émise par des premières unités LED (10) et des deuxièmes unités LED (12) ayant différentes compositions spectrales et les premières unités LED (10) et les deuxièmes unités LED (12) pouvant être commandées séparément.
EP11817261.8A 2010-07-16 2011-07-06 Phare pour éolienne Withdrawn EP2593712A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010027529A DE102010027529A1 (de) 2010-07-16 2010-07-16 Leuchtfeuer, insbesondere für ein Windrad
PCT/DE2011/001429 WO2012025078A2 (fr) 2010-07-16 2011-07-06 Phare pour éolienne

Publications (1)

Publication Number Publication Date
EP2593712A2 true EP2593712A2 (fr) 2013-05-22

Family

ID=45402873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11817261.8A Withdrawn EP2593712A2 (fr) 2010-07-16 2011-07-06 Phare pour éolienne

Country Status (4)

Country Link
US (1) US20130279162A1 (fr)
EP (1) EP2593712A2 (fr)
DE (1) DE102010027529A1 (fr)
WO (1) WO2012025078A2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015131255A1 (fr) * 2014-03-03 2015-09-11 3173879 Canada Inc. Système d'éclairage à obstruction de balise
DE102015118028A1 (de) * 2015-10-22 2017-04-27 Quantec Grund GmbH & Co. KG Überwachung tieffliegender Luftfahrzeuge
DE202015105908U1 (de) * 2015-11-05 2017-02-07 Quantec Grund GmbH & Co. KG Hindernisfeuer zur Absicherung eines Luftfahrthindernisses
DE102017103219A1 (de) * 2017-02-16 2018-08-16 Osram Oled Gmbh Beleuchtungseinrichtung, Verfahren zur Beleuchtung und Beleuchtungsanlage

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5929788A (en) * 1997-12-30 1999-07-27 Star Headlight & Lantern Co. Warning beacon
DE10059844A1 (de) * 2000-11-30 2002-06-13 Karl Kapfer Mehrfach-Warnleuchte für verschiedenfarbige Signallichter
DE20219037U1 (de) 2002-12-08 2003-04-24 Uckerwerk Energietechnik Gmbh LED-Gefahrenfeuer
US20070164875A1 (en) * 2003-11-21 2007-07-19 Fredericks Thomas M LED aircraft anticollision beacon
US7416312B1 (en) * 2006-10-07 2008-08-26 Mcdermott Kevin Multi-color light
DE102007009896B4 (de) 2007-02-28 2009-05-07 Bernd Ballaschk Leuchtfeuer
DE202007005003U1 (de) 2007-04-03 2007-07-19 Aqua Signal Aktiengesellschaft Leuchte, insbesondere Gefahrenfeuer für Windkraftanlagen
US8033683B2 (en) * 2008-02-15 2011-10-11 PerkinElmer LED Solutions, Inc. Staggered LED based high-intensity light
US20100091507A1 (en) * 2008-10-03 2010-04-15 Opto Technology, Inc. Directed LED Light With Reflector

Also Published As

Publication number Publication date
US20130279162A1 (en) 2013-10-24
WO2012025078A3 (fr) 2012-06-07
DE102010027529A1 (de) 2012-01-19
WO2012025078A2 (fr) 2012-03-01

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