EP2343473A1 - LED street lighting - Google Patents
LED street lighting Download PDFInfo
- Publication number
- EP2343473A1 EP2343473A1 EP10015188A EP10015188A EP2343473A1 EP 2343473 A1 EP2343473 A1 EP 2343473A1 EP 10015188 A EP10015188 A EP 10015188A EP 10015188 A EP10015188 A EP 10015188A EP 2343473 A1 EP2343473 A1 EP 2343473A1
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- EP
- European Patent Office
- Prior art keywords
- light
- channel
- shaped reflector
- housing
- reflector
- 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.)
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Classifications
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- 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
- F21S8/08—Lighting devices intended for fixed installation with a standard
- F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
- F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S4/00—Lighting devices or systems using a string or strip of light sources
- F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
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- 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
- F21V7/00—Reflectors for light sources
- F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
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- 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
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/10—Pendants, arms, or standards; Fixing lighting devices to pendants, arms, or standards
- F21V21/116—Fixing lighting devices to arms or standards
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- 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
- F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
- F21V21/14—Adjustable mountings
- F21V21/30—Pivoted housings or frames
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- 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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/06—Optical design with parabolic curvature
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- 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
- F21W2131/10—Outdoor lighting
- F21W2131/103—Outdoor lighting of streets or roads
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- 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
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- 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
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- 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 device for illuminating a traffic route according to the preamble of patent claim 1.
- Devices for illuminating a traffic route are known in a multiplicity of different embodiments.
- One embodiment is devices for illuminating a traffic route, which use, for example, light-emitting light-emitting diodes (LEDs) as light sources.
- LEDs light-emitting light-emitting diodes
- LED light emitting light emitting diodes
- the document shows DE 20 2007 002 187 U1 a street lamp convertible with LED technology in a mushroom or suitcase form, whereby a board equipped with LED's is suitable for the connection in different versions, as for example E27, E40, GU10, bayonet or Edison linearen.
- the boards equipped with LEDs or the rod-shaped LED sockets are correspondingly more conventional in the horizontal or vertical direction in the lighting device Illuminant usable.
- the disadvantage is that the light rays emanating from the bulbs formed in this way are radiated in all directions, as a result of which a considerable proportion of the light rays fall into regions in which illumination is not required or desired. For example, light rays that radiate to lateral areas may present unwanted glare to drivers of vehicles, residents, and / or nocturnal animals. In addition, due to the radiation characteristic, only a spherical cap-like light distribution is achieved in the illuminated area.
- the object of the invention is to improve a light distribution of an LED lighting device in a region to be illuminated.
- the invention is based on a device for illuminating a traffic route, wherein the device comprises a housing for receiving at least one light source, wherein the light source is formed by one or more luminous bodies and each luminous body has at least one light-emitting means, preferably a light-emitting light-emitting diode (LED), wherein the lighting means is arranged on a carrier element and is supplied by means of a ballast with electrical energy.
- the device comprises a housing for receiving at least one light source, wherein the light source is formed by one or more luminous bodies and each luminous body has at least one light-emitting means, preferably a light-emitting light-emitting diode (LED), wherein the lighting means is arranged on a carrier element and is supplied by means of a ballast with electrical energy.
- LED light-emitting light-emitting diode
- the essence of the invention is that the luminous body is designed as a channel-shaped reflector.
- a channel-shaped reflector is meant a tubular body which is open to one side in its entire longitudinal direction, whereby lateral boundaries are formed.
- the light rays emanating from the light source are shaded by the lateral inner surfaces of the channel-shaped reflector, or, if these are mirrored, reflected.
- shading (vignetting) of the forming light profile is formed according to the linear beam optics.
- a beam-like light profile can be formed by shadowing in the edge regions.
- the shape and size of the light profile to be formed is determined by the shape of the reflector, the position of the light source and the distance between the lighting device and the traffic area.
- a uniform illumination of the area to be illuminated can be achieved on a traffic route, since due to the reflection of the light beams in a channel-shaped reflector less loss rays occur.
- the channel-shaped reflector has a U-shaped cross section.
- the U-shaped cross section comprises a lower region and two lateral regions, wherein the edge line of the cross section may be arched, round or edged.
- a large portion of the light rays emanating from an LED is reflected at the lateral areas, whereby loss radiation of the light beams can be reduced.
- an improved mounting of light sources in the lower region of the channel-shaped reflector is possible.
- the channel-shaped reflector is dimensioned in the region of a base area for the linear arrangement of a plurality of spaced-apart LEDs.
- the lower portion of an example U-shaped cross-section is in the groove-shaped reflector designed as a flat base of sufficient width.
- the flat base allows a uniform arrangement and attachment of bulbs.
- the distance between the LEDs can be selected such that the light beams overlap in the reflector longitudinal direction at an early stage. As a result, a uniform light profile can be formed.
- the channel-shaped reflector has a base surface which is perforated by at least one recess for the passage of at least one light source.
- the light-emitting means is arranged on a separate carrier element, wherein the carrier element on the outwardly directed surface of the reflector is preferably releasably attachable. This makes it possible, if necessary, a simplified replacement of a possibly defective bulbs or entire carriers possible.
- the luminous element and the carrier element is integrally formed.
- the base of the channel-shaped reflector forms the support element on which the light source can be arranged directly. This has the advantage that the luminous element in the lighting device has a reduced space requirement.
- the one-piece embodiment forms a module character, which facilitates mounting of the luminous element.
- the lighting means is arranged in a focal point of an enveloping parabola of a cross section of the channel-shaped reflector.
- the parabola is an axisymmetric curve whose vertex and focus lie on the symmetry axis of the curve. Light rays entering a parabola running parallel to the axis of symmetry are reflected at the parabolic inner surfaces and subsequently pass through the focal point of the parabola. This effect is in reversed direction.
- the light rays of a luminous means which is arranged in the focal point of a parabolic, channel-shaped reflector are reflected on the lateral inner surfaces of the reflector and emerge in parallel from the reflector. Only the unreflected direct rays deviate from this direction. Thereby, a light profile with a uniform light distribution can be formed on the surface of a traffic route, which has a high light output due to low loss radiation.
- the channel-shaped reflector along a groove longitudinal direction has a focal axis and at least one light source is arranged on the focal axis.
- the focal axis extends in the axial longitudinal direction through the focal point of the reflector cross-section.
- the illuminant arranged on the carrier element is positioned on the focal axis of the reflector.
- the reflected light beams form a uniform light profile in the longitudinal direction of the reflector, while perpendicular to the beam-optical defocusing takes place.
- At least one outer surface of the housing has cooling fins for dissipating heat and / or the housing is formed from a good thermally conductive material, preferably metal.
- the housing is closed on the surface facing away from the illumination side with a plate-shaped cover, on the surface of which cooling fins for dissipating heat are arranged.
- the luminous elements are in direct contact via the carrier elements with the cover element of the housing, whereby the heat generated by the luminous means can be dissipated via the carrier elements onto the cooling fins into the environment. By sufficient dissipation of the heat generated by the bulbs, the life of the bulbs can be increased.
- a plurality of side by side arranged in parallel luminous body are provided in the housing.
- the parallel arrangement of the luminous body leads to a superposition of individual light profiles in the transverse direction of the channel-shaped reflector, whereby a light profile is formed with a uniform light distribution without diffuse regions within the light profile.
- each cascade in the housing a plurality of parallel cascades arranged side by side of lighting means are provided, each cascade is arranged on a support member and the light of each cascade is directed by a luminous body according to the invention towards the traffic route.
- the cascade-shaped arrangement of the bulbs leads to a superposition of light rays in the longitudinal direction of the channel-shaped reflector, whereby a uniform light distribution without diffuse regions takes place.
- FIG. 1 shown front view of an LED lighting device 1 comprises a rectangular housing 2, wherein the front surface is a large area pierced and closed with a transparent plate material, such as glass or plastic.
- a light source 3 is arranged, which is formed of juxtaposed luminous bodies 4.
- the luminous element 4 comprises a channel-shaped reflector 7 in which a plurality of luminous means 5 are arranged linearly one behind the other.
- the channel-shaped reflector is U-shaped and arranged to be detachable perpendicular to the longitudinal extent of the housing 2.
- the luminous element 4 is suitable for arrangement in different directions and mutual distances.
- the light-emitting means 5 is designed as a light-emitting light-emitting diode (LED) and is supplied with electrical energy by means of a ballast (not shown).
- a headband 12 is pivotally mounted on the housing 2, whereby an alignment of the housing 2 for optimal illumination of a traffic route is made possible.
- the headband 12 is fastened by means of a clamp 13 to a lamppost or the like.
- the LED lighting device 1 is supplied in the illustrated embodiment via an electrical supply line 14 with electrical energy. It is also an energy supply via photovoltaic elements conceivable. These can be arranged for example on the back of the housing 2.
- FIG. 10 is a rear view of an LED lighting device 1 according to FIG FIG. 1 shown, wherein the housing 2 is closed on the surface facing away from the illumination side with a cover 2a.
- the cover 2a has on its outwardly facing surface Cooling ribs 11, via which the resulting heat from the lamps 5 is dissipated to the environment.
- the cooling fins 11 are integrally formed with the surface of the cover 2a, wherein the cover 2a is detachably disposed on the back of the housing 2 and by means of a seal.
- the material of the case 2 and the cover member 2a with the cooling fins 11 disposed thereon is made of a metallic material having good thermal conductivity and corrosion resistance, for example, aluminum alloys.
- FIG. 3 is a perspective sketch of a channel-shaped reflector 7 shown as part of a filament 4, which has a U-shaped cross-section, wherein the U-shaped cross section is adapted to the course of a parabola.
- the reflector comprises two oppositely arranged legs 10, which are interconnected via a base 8.
- the inner surfaces of the legs 10 have a reflective coating, which forms good reflection properties for incident light rays.
- the base 8 is interrupted by rectangular and uniformly spaced recesses 9, wherein on the outwardly directed surface of the base 8 of the reflector 7, the support elements 6 can be arranged with the lamps 5 arranged thereon.
- the distance and the curvature of the two opposing legs 10 of the reflector 7 is adapted to the light profile to be formed.
- the height of the legs 10 of the channel-shaped reflector 7 is a multiple of the height of the light source 5. In individual cases, ratios of 1: 5 or more are conceivable, the ratio always being adapted to the light profile properties to be achieved. From the direction of the symmetry axis of the channel cross-section deviating, emerging from the gutter light beams are thereby minimized.
- the reflector is thus designed for a maximum number of parallel emerging from the reflector 7 light beams to a high light output within a light profile to be formed and a largely sharp boundary on the surface of an
- FIG. 4 is a perspective sketch of a Carrier element 6 is shown, which shows a linear arrangement of lamps 5.
- the lighting means 5 are arranged in a succession and spaced-apart arrangement on the surface of the carrier element 6, wherein the lighting means 5 are supplied by means of electrical conductor tracks 17 with energy.
- the carrier element 6 is arranged on the outwardly directed surface of the base 8 on the channel-shaped reflector 7 such that the lighting means 5 pass through the recesses 9 arranged in the base 8.
- the length of a carrier element 6 is adapted to the number of lamps 5 to be arranged, wherein the carrier element 6 is suitable for a series connection of a plurality of carrier elements 6 on the channel-shaped reflector 7.
- FIG. 5 is a light beam reflection of light rays 15 in a channel-shaped reflector 7 is shown schematically, wherein the light rays 15 are emitted from a light source 5.
- the cross section of the channel-shaped reflector 7 is adapted to the shape of a parabola, wherein the illuminant 5 is arranged in the focal point 16 of a reflector 7 virtually enveloping parabola.
- a high proportion of the light rays 15 emanating from the luminous means 5 is reflected on the surfaces of the legs 10 and emitted as parallel light rays 15 from the trough-shaped reflector 7.
- the parallel light beams 15 form a beam-shaped light profile, wherein the non-parallel, the gutter unreflected directly leaving light beams of the light source 5 form a weak, optimally no longer perceptible, diffuse brightness range at the edge of the light profile.
- the diffuse edge region of the intensity of the light profile can be minimized by a juxtaposition of further reflectors 7, since the light beams 15 are superimposed by two adjacent reflectors 7 in the adjacent edge regions.
- a straight line extending through the focal point 16 of the virtually enveloping parabola in the direction of the channel course forms a focal axis on which light sources 5 are arranged linearly one behind the other.
- a light profile is generated, which illuminates a bar-shaped surface on a traffic route almost homogeneously.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zur Beleuchtung eines Verkehrsweges nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for illuminating a traffic route according to the preamble of patent claim 1.
Vorrichtungen zur Beleuchtung eines Verkehrsweges sind in einer Vielzahl von unterschiedlichen Ausführungsformen bekannt. Eine Ausführungsform sind Vorrichtungen zur Beleuchtung eines Verkehrsweges, welche als Leuchtmittel beispielsweise lichtemittierende Leuchtdioden (LED's) verwenden.Devices for illuminating a traffic route are known in a multiplicity of different embodiments. One embodiment is devices for illuminating a traffic route, which use, for example, light-emitting light-emitting diodes (LEDs) as light sources.
Die Verwendung von lichtemittierenden Leuchtdioden (LED) stellt für den Energieverbrauch derartiger Vorrichtungen eine bevorzugte Ausführungsform dar, da der Energieverbrauch einer Leuchtdiode (LED) deutlich unterhalb des Energieverbrauchs eines herkömmlichen Leuchtmittels, beispielsweise einer Gasentladungslampe liegt.The use of light emitting light emitting diodes (LED) is a preferred embodiment for the power consumption of such devices because the power consumption of a light emitting diode (LED) is well below the power consumption of a conventional light source such as a gas discharge lamp.
Beispielsweise zeigt die Druckschrift
Die mit LED's bestückten Platinen bzw. die stabförmigen LED-Fassungen sind in horizontaler oder vertikaler Richtung in der Beleuchtungsvorrichtung entsprechend herkömmlicher Leuchtmittel verwendbar.The boards equipped with LEDs or the rod-shaped LED sockets are correspondingly more conventional in the horizontal or vertical direction in the lighting device Illuminant usable.
Nachteilig ist, dass die von den so gebildeten Leuchtmitteln ausgehenden Lichtstrahlen in alle Richtungen abgestrahlt werden, wodurch ein erheblicher Anteil der Lichtstrahlen in Bereiche fällt, in welchen eine Ausleuchtung nicht erforderlich bzw. erwünscht ist. Lichtstrahlen, die beispielsweise in seitliche Bereiche strahlen, können eine unerwünschte Blendung für Fahrer von Fahrzeugen, Anwohner und/oder nachtaktiven Tieren darstellen. Darüber hinaus wird in dem ausgeleuchteten Bereich aufgrund der Strahlungscharakteristik lediglich eine Kugelkappen ähnliche Lichtverteilung erreicht.The disadvantage is that the light rays emanating from the bulbs formed in this way are radiated in all directions, as a result of which a considerable proportion of the light rays fall into regions in which illumination is not required or desired. For example, light rays that radiate to lateral areas may present unwanted glare to drivers of vehicles, residents, and / or nocturnal animals. In addition, due to the radiation characteristic, only a spherical cap-like light distribution is achieved in the illuminated area.
Aus diesem Grunde hat sich die Erfindung die Aufgabe gestellt, eine Lichtverteilung einer LED-Beleuchtungsvorrichtung in einem auszuleuchtenden Bereich zu verbessern.For this reason, the object of the invention is to improve a light distribution of an LED lighting device in a region to be illuminated.
Ausgehend von dem Oberbegriff des Patentanspruches 1 wird die erfindungsgemäße Aufgabe durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst.Based on the preamble of claim 1, the object of the invention is achieved by the characterizing features of claim 1.
Vorteilhafte Erweiterungen der Erfindungen sind in den abhängigen Ansprüchen beschrieben.Advantageous extensions of the inventions are described in the dependent claims.
Die Erfindung geht von einer Vorrichtung zur Beleuchtung eines Verkehrsweges aus, wobei die Vorrichtung ein Gehäuse zur Aufnahme mindestens einer Lichtquelle umfasst, wobei die Lichtquelle durch einen oder mehrere Leuchtkörper gebildet ist und jeder Leuchtkörper mindestens ein Leuchtmittel, vorzugsweise eine lichtemittierende Leuchtdiode (LED) aufweist, wobei das Leuchtmittel auf einem Trägerelement angeordnet ist und mittels einem Vorschaltgerät mit elektrischer Energie versorgt ist.The invention is based on a device for illuminating a traffic route, wherein the device comprises a housing for receiving at least one light source, wherein the light source is formed by one or more luminous bodies and each luminous body has at least one light-emitting means, preferably a light-emitting light-emitting diode (LED), wherein the lighting means is arranged on a carrier element and is supplied by means of a ballast with electrical energy.
Der Kern der Erfindung liegt darin, dass der Leuchtkörper als rinnenförmiger Reflektor ausgebildet ist.The essence of the invention is that the luminous body is designed as a channel-shaped reflector.
Unter einem rinnenförmigen Reflektor ist ein rohrförmiger Körper zu verstehen, welcher zu einer Seite in seiner gesamten Längsrichtung hin geöffnet ist, wodurch seitliche Begrenzungen gebildet werden.By a channel-shaped reflector is meant a tubular body which is open to one side in its entire longitudinal direction, whereby lateral boundaries are formed.
Die vom Leuchtmittel ausgehenden Lichtstrahlen werden durch die seitlichen Innenoberflächen des rinnenförmigen Reflektors abgeschattet, oder wenn diese verspiegelt sind, reflektiert.The light rays emanating from the light source are shaded by the lateral inner surfaces of the channel-shaped reflector, or, if these are mirrored, reflected.
Dadurch wird eine Abschattung (Vignettierung) des sich bildenden Lichtprofils nach der linearen Strahlenoptik gebildet. Beispielsweise kann ein balkenähnliches Lichtprofil durch Abschattungen in den Randbereichen gebildet werden. Die Form und die Größe des zu bildenden Lichtprofils wird durch die Form des Reflektors, die Position des Leuchtmittels und dem Abstand zwischen der Beleuchtungsvorrichtung und der Verkehrsfläche bestimmt.As a result, shading (vignetting) of the forming light profile is formed according to the linear beam optics. For example, a beam-like light profile can be formed by shadowing in the edge regions. The shape and size of the light profile to be formed is determined by the shape of the reflector, the position of the light source and the distance between the lighting device and the traffic area.
Darüber hinaus kann eine gleichmäßige Ausleuchtung des auszuleuchtenden Bereichs auf einem Verkehrsweg erreicht werden, da aufgrund der Reflexion der Lichtstrahlen in einem rinnenförmigen Reflektor weniger Verluststrahlen auftreten.In addition, a uniform illumination of the area to be illuminated can be achieved on a traffic route, since due to the reflection of the light beams in a channel-shaped reflector less loss rays occur.
In einer bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass der rinnenförmige Reflektor einen U-förmigen Querschnitt aufweist. Der U-förmige Querschnitt umfasst einen unteren Bereich und zwei seitliche Bereiche, wobei die Kantenlinie des Querschnitts gewölbt, rund oder kantig ausgebildet sein kann.In a preferred embodiment of the invention it is provided that the channel-shaped reflector has a U-shaped cross section. The U-shaped cross section comprises a lower region and two lateral regions, wherein the edge line of the cross section may be arched, round or edged.
Ein großer Anteil der von einer LED ausgehenden Lichtstrahlen wird an den seitlichen Bereichen reflektiert, wodurch eine Verluststrahlung der Lichtstrahlen verringert werden kann. Zusätzlich ist eine verbesserte Montage von Leuchtmitteln im unteren Bereich des rinnenförmigen Reflektors möglich.A large portion of the light rays emanating from an LED is reflected at the lateral areas, whereby loss radiation of the light beams can be reduced. In addition, an improved mounting of light sources in the lower region of the channel-shaped reflector is possible.
In einer überdies bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass der rinnenförmige Reflektor im Bereich einer Grundfläche zur linearen Anordnung von mehreren, voneinander beabstandeten LED's dimensioniert ist. Der untere Bereich eines beispielsweise U-förmigen Querschnitts ist in dem rinnenförmigen Reflektor als ebene Grundfläche ausreichender Breite ausgebildet. Die ebene Grundfläche ermöglicht eine gleichmäßige Anordnung und Befestigung von Leuchtmitteln. Darüber hinaus kann der Abstand zwischen den LED's derart gewählt werden, dass sich die Lichtstrahlen in Reflektorlängsrichtung frühzeitig überschneiden. Dadurch kann ein gleichmäßiges Lichtprofil gebildet werden.In a further preferred embodiment of the invention, it is provided that the channel-shaped reflector is dimensioned in the region of a base area for the linear arrangement of a plurality of spaced-apart LEDs. The lower portion of an example U-shaped cross-section is in the groove-shaped reflector designed as a flat base of sufficient width. The flat base allows a uniform arrangement and attachment of bulbs. In addition, the distance between the LEDs can be selected such that the light beams overlap in the reflector longitudinal direction at an early stage. As a result, a uniform light profile can be formed.
Es ist in einer weiteren bevorzugten Ausgestaltung der Erfindung vorgesehen, dass der rinnenförmige Reflektor eine Grundfläche aufweist, die von mindestens einer Ausnehmung zum Durchtritt mindestens eines Leuchtmittels durchbrochen ist. Das Leuchtmittel (LED) ist dabei auf einem separaten Trägerelement angeordnet, wobei das Trägerelement an der nach außen gerichteten Oberfläche des Reflektors vorzugsweise lösbar befestigbar ist. Dadurch ist gegebenenfalls ein vereinfachter Austausch von einem eventuell defekten Leuchtmittel oder von ganzen Trägern möglich.It is provided in a further preferred embodiment of the invention that the channel-shaped reflector has a base surface which is perforated by at least one recess for the passage of at least one light source. The light-emitting means (LED) is arranged on a separate carrier element, wherein the carrier element on the outwardly directed surface of the reflector is preferably releasably attachable. This makes it possible, if necessary, a simplified replacement of a possibly defective bulbs or entire carriers possible.
In einer überdies bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass der Leuchtkörper und das Trägerelement einstückig ausgebildet ist. Die Grundfläche des rinnenförmigen Reflektors bildet dabei das Trägerelement, auf welchem das Leuchtmittel direkt angeordnet werden kann. Dies hat den Vorteil, dass der Leuchtkörper in der Beleuchtungsvorrichtung einen verringerten Platzbedarf aufweist. Zusätzlich bildet die einstückige Ausführungsform einen Modulcharakter, welcher eine Montage der Leuchtkörper erleichtert.In a further preferred embodiment of the invention it is provided that the luminous element and the carrier element is integrally formed. The base of the channel-shaped reflector forms the support element on which the light source can be arranged directly. This has the advantage that the luminous element in the lighting device has a reduced space requirement. In addition, the one-piece embodiment forms a module character, which facilitates mounting of the luminous element.
Es ist in einer weiteren bevorzugten Ausgestaltung der Erfindung vorgesehen, dass das Leuchtmittel in einem Brennpunkt einer einhüllenden Parabel eines Querschnitts des rinnenförmigen Reflektors angeordnet ist.It is provided in a further preferred embodiment of the invention that the lighting means is arranged in a focal point of an enveloping parabola of a cross section of the channel-shaped reflector.
Als Parabel ist eine achsensymmetrische Kurve zu verstehen, deren Scheitelpunkt und Brennpunkt auf der Symmetrieachse der Kurve liegen. In eine Parabel eintretende, parallel zur Symmetrieachse verlaufende Lichtstrahlen werden an den Parabelinnenflächen reflektiert und verlaufen anschließend durch den Brennpunkt der Parabel. Dieser Effekt wird in umgekehrter Richtung genutzt.The parabola is an axisymmetric curve whose vertex and focus lie on the symmetry axis of the curve. Light rays entering a parabola running parallel to the axis of symmetry are reflected at the parabolic inner surfaces and subsequently pass through the focal point of the parabola. This effect is in reversed direction.
Die Lichtstrahlen eines Leuchtmittels, welches im Brennpunkt eines parabelförmigen, rinnenförmigen Reflektors angeordnet ist werden an den seitlichen Innenoberflächen des Reflektors reflektiert und treten parallel aus dem Reflektor aus. Lediglich die unreflektierten Direktstrahlen weichen von dieser Richtung ab. Dadurch kann ein Lichtprofil mit einer gleichmäßigen Lichtverteilung auf der Oberfläche eines Verkehrsweges gebildet werden, welches eine hohe Lichtausbeute aufgrund geringer Verluststrahlung aufweist.The light rays of a luminous means which is arranged in the focal point of a parabolic, channel-shaped reflector are reflected on the lateral inner surfaces of the reflector and emerge in parallel from the reflector. Only the unreflected direct rays deviate from this direction. Thereby, a light profile with a uniform light distribution can be formed on the surface of a traffic route, which has a high light output due to low loss radiation.
Überdies ist es in einer weiteren Ausgestaltung der Erfindung vorgesehen, dass der rinnenförmige Reflektor entlang einer Rinnenlängsrichtung eine Brennachse aufweist und mindestens ein Leuchtmittel auf der Brennachse angeordnet ist. Die Brennachse verläuft in axialer Längsrichtung durch den Brennpunkt des Reflektorquerschnitts. Das auf dem Trägerelement angeordnete Leuchtmittel ist auf der Brennachse des Reflektors positioniert. Die reflektierten Lichtstrahlen bilden dabei ein gleichmäßiges Lichtprofil in Längsrichtung des Reflektors aus, während senkrecht dazu die strahlenoptische Defokussierung erfolgt.Moreover, it is provided in a further embodiment of the invention that the channel-shaped reflector along a groove longitudinal direction has a focal axis and at least one light source is arranged on the focal axis. The focal axis extends in the axial longitudinal direction through the focal point of the reflector cross-section. The illuminant arranged on the carrier element is positioned on the focal axis of the reflector. The reflected light beams form a uniform light profile in the longitudinal direction of the reflector, while perpendicular to the beam-optical defocusing takes place.
Es ist in einer weiteren Ausgestaltung der Erfindung vorgesehen, dass mindestens eine äußere Oberfläche des Gehäuses Kühlrippen zur Ableitung von Wärme aufweist und/oder das Gehäuse aus einem gut thermisch leitfähigen Material, vorzugsweise Metall, gebildet ist. Das Gehäuse ist auf der zur Beleuchtungsseite abgewandten Oberfläche mit einem plattenförmigen Abdeckelement verschlossen, auf dessen Oberfläche Kühlrippen zur Ableitung von Wärme angeordnet sind. Die Leuchtkörper stehen über die Trägerelemente mit dem Abdeckelement des Gehäuses direkt in Kontakt, wodurch die von den Leuchtmitteln erzeugte Wärme über die Trägerelemente auf die Kühlrippen in die Umgebung abgeleitet werden kann. Durch eine ausreichende Ableitung der von den Leuchtmitteln erzeugten Wärme kann die Lebensdauer der Leuchtmittel erhöht werden.It is provided in a further embodiment of the invention that at least one outer surface of the housing has cooling fins for dissipating heat and / or the housing is formed from a good thermally conductive material, preferably metal. The housing is closed on the surface facing away from the illumination side with a plate-shaped cover, on the surface of which cooling fins for dissipating heat are arranged. The luminous elements are in direct contact via the carrier elements with the cover element of the housing, whereby the heat generated by the luminous means can be dissipated via the carrier elements onto the cooling fins into the environment. By sufficient dissipation of the heat generated by the bulbs, the life of the bulbs can be increased.
Überdies ist es in einer weiteren Ausgestaltung vorgesehen, dass im Gehäuse mehrere nebeneinander parallel angeordnete Leuchtkörper vorgesehen sind. Die parallele Anordnung der Leuchtkörper führt zu einer Überlagerung von einzelnen Lichtprofilen in Querrichtung des rinnenförmigen Reflektors, wodurch ein Lichtprofil mit einer gleichmäßigen Lichtverteilung ohne diffuse Bereiche innerhalb des Lichtprofils gebildet ist.Moreover, it is provided in a further embodiment that a plurality of side by side arranged in parallel luminous body are provided in the housing. The parallel arrangement of the luminous body leads to a superposition of individual light profiles in the transverse direction of the channel-shaped reflector, whereby a light profile is formed with a uniform light distribution without diffuse regions within the light profile.
In einer bevorzugten Ausgestaltung der Erfindung ist vorgesehen, dass im Gehäuse mehrere, nebeneinander parallel angeordnete lineare Kaskaden von Leuchtmitteln vorgesehen sind, wobei jede Kaskade auf einem Trägerelement angeordnet ist und das Licht jeder Kaskade durch einen erfindungsgemäßen Leuchtkörper zum Verkehrsweg hin gerichtet wird. Die kaskadenförmige Anordnung der Leuchtmittel führt zu einer Überlagerung (Superposition) von Lichtstrahlen in Längsrichtung des rinnenförmigen Reflektors, wodurch eine gleichmäßige Lichtverteilung ohne diffuse Bereiche erfolgt.In a preferred embodiment of the invention it is provided that in the housing a plurality of parallel cascades arranged side by side of lighting means are provided, each cascade is arranged on a support member and the light of each cascade is directed by a luminous body according to the invention towards the traffic route. The cascade-shaped arrangement of the bulbs leads to a superposition of light rays in the longitudinal direction of the channel-shaped reflector, whereby a uniform light distribution without diffuse regions takes place.
Weitere Merkmale der Erfindung gehen aus der nachfolgenden Figurenbeschreibung des Ausführungsbeispiels und den Zeichnungen hervor.Further features of the invention will become apparent from the following description of the figures of the embodiment and the drawings.
Dabei zeigen:
- Figur 1
- eine Frontansicht einer Vorrichtung zur Beleuchtung eines Verkehrsweges;
Figur 2- eine Rückansicht einer Vorrichtung zur Beleuchtung eines Verkehrsweges;
Figur 3- eine perspektivische Skizze eines rinnenförmigen Reflektors;
- Figur 4
- eine perspektivische Skizze eines Trägerelementes mit darauf angeordneten Leuchtmitteln;
Figur 5- eine Lichtstrahlenreflexion in einem rinnenförmigen Reflektor.
- FIG. 1
- a front view of a device for illuminating a traffic route;
- FIG. 2
- a rear view of a device for illuminating a traffic route;
- FIG. 3
- a perspective sketch of a channel-shaped reflector;
- FIG. 4
- a perspective sketch of a support element with light sources arranged thereon;
- FIG. 5
- a light beam reflection in a channel-shaped reflector.
Die in
Der Leuchtkörper 4 umfasst einen rinnenförmigen Reflektor 7, in welchem mehrere Leuchtmittel 5 linearförmig hintereinander angeordnet sind. Der rinnenförmige Reflektor ist U-förmig ausgebildet und senkrecht zur Längserstreckung des Gehäuses 2 lösbar angeordnet. Der Leuchtkörper 4 ist zur Anordnung in unterschiedlichen Richtungen und gegenseitigen Abständen geeignet. Das Leuchtmittel 5 ist als lichtemittierende Leuchtdiode (LED) ausgebildet und wird mittels eines Vorschaltgerätes (nicht dargestellt) mit elektrischer Energie versorgt.The luminous element 4 comprises a channel-shaped
An den Seitenflächen des Gehäuses 2 ist ein Haltebügel 12 schwenkbar am Gehäuse 2 angeordnet, wodurch eine Ausrichtung des Gehäuses 2 zur optimalen Ausleuchtung eines Verkehrsweges ermöglicht wird. Der Haltebügel 12 ist mittels einer Schelle 13 an einem Laternenmast oder ähnlichem befestigbar. Die LED-Beleuchtungsvorrichtung 1 ist im gezeigten Ausführungsbeispiel über eine elektrische Zuleitung 14 mit elektrischer Energie versorgt. Es ist auch eine Energieversorgung über Photovoltaik-Elemente denkbar. Diese können beispielsweise auf der Rückseite des Gehäuses 2 angeordnet werden.On the side surfaces of the
In
In
In
- 11
- LED-BeleuchtungsvorrichtungLED lighting device
- 22
- Gehäusecasing
- 2a2a
- Abdeckelementcover
- 33
- Lichtquellelight source
- 44
- Leuchtkörperilluminant
- 55
- Leuchtmittel (LED)Illuminant (LED)
- 66
- Trägerelementsupport element
- 77
- Reflektorreflector
- 88th
- GrundflächeFloor space
- 99
- Ausnehmungrecess
- 1010
- Schenkelleg
- 1111
- Kühlrippecooling fin
- 1212
- Haltebügelheadband
- 1313
- Schelleclamp
- 1414
- Zuleitungsupply
- 1515
- Lichtstrahlbeam of light
- 1616
- Brennpunktfocus
- 1717
- Leiterbahnconductor path
Claims (10)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010004177A DE102010004177A1 (en) | 2010-01-07 | 2010-01-07 | LED street lighting |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2343473A1 true EP2343473A1 (en) | 2011-07-13 |
Family
ID=43569243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10015188A Withdrawn EP2343473A1 (en) | 2010-01-07 | 2010-12-01 | LED street lighting |
Country Status (2)
Country | Link |
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EP (1) | EP2343473A1 (en) |
DE (1) | DE102010004177A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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FR3073605A1 (en) * | 2017-11-16 | 2019-05-17 | Chrysalis | KIT FOR REALIZING A LUMINAIRE |
WO2022129155A1 (en) * | 2020-12-15 | 2022-06-23 | Schreder S.A. | Orientable luminaire head, fixation assembly therefor, and method for adjusting an orientation thereof |
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US20030156416A1 (en) * | 2002-02-21 | 2003-08-21 | Whelen Engineering Company, Inc. | Led light assembly |
WO2006122392A1 (en) * | 2005-05-20 | 2006-11-23 | Tir Systems Ltd. | Cove illumination module and system |
DE202007002187U1 (en) | 2007-02-07 | 2007-04-12 | Schmidt Ulrich | Street light and lamps for stadia and meeting halls uses LED technology preferably on an LED plate and in any geometric shape |
DE102008007723A1 (en) * | 2008-02-06 | 2009-08-20 | Osram Gesellschaft mit beschränkter Haftung | Lighting module, luminaire and method for lighting |
US20090323334A1 (en) * | 2008-06-25 | 2009-12-31 | Cree, Inc. | Solid state linear array modules for general illumination |
-
2010
- 2010-01-07 DE DE102010004177A patent/DE102010004177A1/en not_active Withdrawn
- 2010-12-01 EP EP10015188A patent/EP2343473A1/en not_active Withdrawn
Patent Citations (5)
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US20030156416A1 (en) * | 2002-02-21 | 2003-08-21 | Whelen Engineering Company, Inc. | Led light assembly |
WO2006122392A1 (en) * | 2005-05-20 | 2006-11-23 | Tir Systems Ltd. | Cove illumination module and system |
DE202007002187U1 (en) | 2007-02-07 | 2007-04-12 | Schmidt Ulrich | Street light and lamps for stadia and meeting halls uses LED technology preferably on an LED plate and in any geometric shape |
DE102008007723A1 (en) * | 2008-02-06 | 2009-08-20 | Osram Gesellschaft mit beschränkter Haftung | Lighting module, luminaire and method for lighting |
US20090323334A1 (en) * | 2008-06-25 | 2009-12-31 | Cree, Inc. | Solid state linear array modules for general illumination |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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FR3073605A1 (en) * | 2017-11-16 | 2019-05-17 | Chrysalis | KIT FOR REALIZING A LUMINAIRE |
WO2019097026A1 (en) * | 2017-11-16 | 2019-05-23 | Chrysalis | Kit for producing a light fitting |
WO2022129155A1 (en) * | 2020-12-15 | 2022-06-23 | Schreder S.A. | Orientable luminaire head, fixation assembly therefor, and method for adjusting an orientation thereof |
NL2027117B1 (en) * | 2020-12-15 | 2022-07-08 | Schreder Sa | Orientable luminaire head, fixation assembly therefor, and method for adjusting an orientation thereof |
Also Published As
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DE102010004177A1 (en) | 2011-07-14 |
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