EP3207308B1 - Wallwasher - Google Patents
Wallwasher Download PDFInfo
- Publication number
- EP3207308B1 EP3207308B1 EP15781100.1A EP15781100A EP3207308B1 EP 3207308 B1 EP3207308 B1 EP 3207308B1 EP 15781100 A EP15781100 A EP 15781100A EP 3207308 B1 EP3207308 B1 EP 3207308B1
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- EP
- European Patent Office
- Prior art keywords
- reflector
- light
- diffuser
- lamp
- leds
- 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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- 239000011521 glass Substances 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 238000005286 illumination Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
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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
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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
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
-
- 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
- F21S4/28—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
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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
- F21S8/04—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
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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
- F21V3/00—Globes; Bowls; Cover glasses
-
- 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
- F21V7/0008—Reflectors for light sources providing for indirect lighting
-
- 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
-
- 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
- F21V7/09—Optical design with a combination of different curvatures
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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
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the present invention relates to a luminaire intended for use as a so-called wall washer.
- a wallwasher is understood to be a luminaire which is specially designed to illuminate a vertical surface of a room, that is to say in particular its wall.
- this lights are used, which are arranged on a horizontally oriented base surface, so for example the ceiling of a room, directly on this or suspended from this and are designed in terms of their light output such that they are, for example, an obliquely located below the mounting position of the lamp wall illuminate.
- the light distribution curve of a wall washer is rather asymmetrical.
- US 2008/204888 A1 refers to an optical system for mixing and redirecting light to illuminate a target surface.
- the system includes a first reflector for receiving a light emitted from the light source (called a first light).
- the light reflected by the first reflector (called the second light) falls on a first diffuser and is transmitted as a so-called third light, namely, reflected to a second reflector and projected onto a second diffuser.
- DE 10 2007 001702 A1 refers to a lighting device (for low ceiling systems, for example, in the aircraft) in the form of a combination of areal backlighting and a reflection of reflected light on a side facing the observer to produce optical depth effect.
- the device consists of two curved, parallel spaced surfaces whose first surface Observer side of a first, hidden behind a panel light source is irradiated. A diffuser between the first light source and the first surface scatters the light emitted from the first light source.
- the second light source faces the second surface, wherein the latter may alternatively or additionally be light-scattering.
- US 8038321 B1 refers to a luminaire housing in which light rays are projected onto a (curved) stationary reflector in the form of a concave reflecting surface. The reflected light passes through the light passageway, passing through a light-spreading or distribution lens, possibly further reflected at an aperture reflector, and finally projective, ie, not diffusely exiting the housing.
- the prior art also shows that in the solutions known hitherto the luminaires must have a certain minimum size in order to be able to achieve a satisfactory illumination of the wall area.
- the present invention is therefore based on the object to provide a novel way to realize a Wallwashers, in spite of a relatively small construction of the lamp, a homogeneous, uniform light field can be achieved on a wall area to be illuminated.
- the solution according to the invention provides for a combination of different measures which, on the one hand, lead to a small construction of the lamp or the wall washer, on the other hand, make it possible to achieve a uniform and homogeneous light distribution.
- LEDs are used as the light source, which are arranged one behind the other in a longitudinal direction of the lamp. The light emitted by these LEDs light is not emitted directly through the lamp but with the help of a concave reflector reflected back so that a light output is made laterally downwards.
- the lamps or LEDs are in this case arranged in the upper region of the reflector so that they light in Essentially opposite to the light emission direction of the lamp to emit the reflector.
- the invention proposes a luminaire which has luminous means which have LEDs arranged one after the other in a longitudinal direction of the luminaire.
- a reflector which is concavely curved in a plane perpendicular to a longitudinal axis of the luminaire, wherein the luminous means in the upper region of the reflector are arranged such that they emit light substantially opposite to a light emission direction of the luminaire onto the reflector.
- a diffuser is arranged below the luminous means, which diffuser extends substantially from a plane in which the luminous means are arranged to the reflector, and wherein the diffuser is oriented substantially perpendicular to this plane and the reflector is aligned in the upper region has a greater curvature than at the bottom.
- the invention is characterized in that the diffuser divides the reflector into two regions, wherein the first reflector region is the upper region of the reflector and faces the LEDs, and wherein the second reflector region is the lower region of the reflector and is on the side facing away from the LEDs the diffuser is located.
- the lighting means so the LEDs, apart from that region of the reflector, which they are opposite, completely separated by the diffuser from the reflector.
- the bulbs, the upper end of the reflector and the diffuser thus enclose a small, running in the longitudinal direction of the lamp so-called mixing chamber in which substantially the desired homogeneous distribution of the light is made. Only the light emerging from this mixing chamber via the diffuser, which is then reflected by the reflector in Lichtabstrahlraum the light out, then leave the light. All the light that is emitted by the lamp, so initially through the diffuser influenced, which ultimately the desired uniform light distribution can be obtained.
- the reflector is concavely curved, it being provided that it has a greater curvature in the upper region, ie the region to which the illuminants are assigned, than in the lower region. This ensures that even such light, which is emitted from the LEDs at relatively shallow angles, still efficiently reflected by the reflector within the above-mentioned mixing chamber and can be directed through the diffuser in the actual responsible for the light output of the lamp reflector area.
- At least in front of the lower region of the reflector can preferably be arranged a glass or PMMA existing cover.
- the arrangement of this cover can be in particular such that it extends approximately from the reflector facing away from the end of the diffuser to the lower edge of the reflector.
- the cover may extend substantially in the plane in which the bulbs are arranged.
- a profiled base body which may be formed for example by an aluminum extruded profile. This can be designed both for the direct installation of a ceiling and for attachment to a support element, for example a so-called support rail of a lighting system or the like.
- FIG. 1 shows first an overall view of the generally provided with the reference numeral 100 lamp according to the invention, which should be used as already mentioned as a so-called wall washer.
- the reference numeral 100 lamp As usual in such lights their assembly takes place on a horizontal mounting surface, so for example on the ceiling of a room or in a comparable manner. In the intended operating mode, this would mean that the in FIG. 1 with the reference numeral 110 provided rear wall of the housing 101 is oriented substantially vertically. However, the light of the luminaire 100 is then not emitted horizontally or vertically downwards but rather obliquely laterally downwards, so that in the case where the luminaire is arranged in the vicinity of a wall, the wall area located obliquely below it is illuminated.
- the aim is for the so-called light field generated on the wall to be illuminated to have the most uniform possible homogeneous brightness.
- special measures are responsible for the light output, which will be explained in more detail below with reference to the other figures.
- the light emitted by the luminous means is not directed directly onto the wall to be illuminated, but instead is indirectly emitted during a so-called retro-reflection.
- LEDs 5 are used as the light source, which are arranged one after the other in the longitudinal direction I of the luminaire 100 and are aligned such that they initially emit their light in the opposite direction to the main emission direction A of the luminaire 100.
- the arrangement of the LEDs 5 takes place with the help of one or more boards 6, which are preferably slightly inclined relative to the vertical defined by the rear wall 101 at an angle ⁇ of about 10 ° to 20 °, in particular about 15 °.
- the actual deflection of the light emitted by the LEDs 5 in the direction of the light emission direction A of the luminaire 100 takes place with the aid of a reflector 10 which extends from an underside of the luminaire housing 101 to an area just above the LEDs 5.
- This invariably embodied in the longitudinal direction I of the lamp 100 reflector 10 has a concave shape in a plane perpendicular to the longitudinal direction I, where he could either be executed correspondingly angled, according to the invention, however, continuously concave curved as shown.
- the preferably made of a highly reflective material reflector 10 thus serves as a so-called back reflector to give off the light obliquely laterally towards the bottom.
- the reflector 10 over the height of the lamp 100 away across no constant curvature but is shaped such that the curvature in the upper region 11, ie the area in the vicinity of which the LEDs are 5, is strongest.
- this allows the dimensions of the mixing chamber 25 are kept relatively compact, on the other hand it is ensured that even light, which is emitted from the LEDs 5 at shallow angles, for example, vertically upwards, is still reflected back from the reflector to the diffuser 20 and as for the light output of the lamp 100 usable light can be used.
- the curvature of the reflector 10 in the area located below the diffuser 20 is then selected such that in this way the desired shape or dimension of the light field on the wall to be illuminated can be achieved.
- an additional cover plate 30 is disposed in front of the lower portion of the reflector, which extends from the lower end of the reflector 10 to the diffuser 20 back.
- This cover 30 defines the actual light exit region of the lamp 100, however, has relatively little influence on the light output, since it is preferably made crystal clear and for this purpose consists of either glass or PMMA.
- the actual light-emitting properties of the luminaire 100 are primarily determined by the arrangement and design of the reflector 10 and the diffuser 20.
- the diffuser 20 itself is preferably formed by a diffuser film which ideally has at least some inherent stability so that it retains its shape and arrangement as shown.
- a film which is sold under the name Brightview Film Circular 15 degrees has been found because when using this film particularly advantageous Lichtabrahleigenschaften can be achieved. This also applies to the case that the luminaire has very compact dimensions of, for example, 40x50mm.
- the holder and arrangement of the various components of the lamp 100 according to the invention is carried out, as already mentioned, preferably with the aid of an extruded aluminum profile, whose configuration in turn is the sectional view of Figures 2 and 3 can be removed.
- This profile part is executed approximately angled and has on the one hand a vertically oriented leg 102, which forms the rear wall 110 of the lamp 100, and a horizontal leg 103, in particular the inclusion of electronic components for operating the LEDs 5 and the assembly of the lamp 100 at a suitable carrier.
- an approximately trapezoidal receiving area 104 is provided in the upper region of the profile part, in the one hand from the bottom of the reflector 10 projects with its upper end portion 11 and the recording of the LED boards 6 is used.
- operating means for operating the LEDs 5 are also arranged within this receiving space.
- This may in particular be a converter or the like, wherein the side walls of this receiving area 104 additionally also have openings or feedthroughs 105 for the feeding of cables or the like.
- the aluminum profile body in this case has a plurality of longitudinally extending grooves or channels, which allow easy insertion of the optical components described above. It can be seen, for example, that the cover plate 30 is received with its upper and lower end respectively in longitudinally extending grooves, so that they can be easily inserted from an end face into the profile body.
- a receptacle and mounting of the reflector 10 which is supported on the one hand at its upper and lower end, but in addition also on its rear side by the profile body.
- the reflector automatically when inserting the illustrated curvature assumes.
- the storage of the diffuser 20 in a corresponding recess extending in the longitudinal direction of the profile body, so that - apart from the LED boards 6 - all essential components of the lamp 100 are held without additional support means on the profile body.
- two correspondingly shaped end caps 120 serve two more longitudinally extending channels that allow the placement and reliable holding the end caps 120.
- FIG. 4 A conceivable arrangement of the wall washer 100 according to the invention on a support is in FIG. 4 illustrated, in which case the carrier rail of a lighting system is used as a carrier element 200.
- the support rail is approximately U-shaped and open to the bottom open, so that the lamp 100 can be attached in a simple manner from the bottom to the mounting rail 200 and fastened there, in which case the upper components, in particular the above mentioned receiving area 104 of the profile body with the operating means located thereon are received in the receiving space of the mounting rail 200.
- An attachment to the support rail 200 is achieved here by means of two clamping webs 106, which are formed at the upper portion of the horizontally extending leg 103 of the profile body.
Description
Die vorliegende Erfindung betrifft eine Leuchte, die zur Verwendung als so genannter Wallwasher vorgesehen ist.The present invention relates to a luminaire intended for use as a so-called wall washer.
Unter einem Wallwasher versteht man eine Leuchte, die speziell dazu ausgelegt ist, eine vertikale Fläche eines Raums, also insbesondere dessen Wand zu beleuchten. Üblicherweise kommen hierbei Leuchten zum Einsatz, welche an einer horizontal ausgerichteten Basisfläche, also beispielsweise der Decke eines Raums, unmittelbar an dieser oder abgehängt von dieser angeordnet werden und hinsichtlich ihrer Lichtabgabe derart ausgelegt sind, dass sie beispielsweise eine schräg unterhalb der Montageposition der Leuchte befindliche Wand beleuchten. Im Vergleich zu einer Leuchte, die primär dazu vorgesehen ist, einen senkrecht unterhalb von ihr befindlichen Bereich auszuleuchten, und die dementsprechend eine eher symmetrische Lichtabgabe aufweist, ist die Lichtverteilungskurve eines Wallwashers eher asymmetrisch ausgelegt.A wallwasher is understood to be a luminaire which is specially designed to illuminate a vertical surface of a room, that is to say in particular its wall. Usually this lights are used, which are arranged on a horizontally oriented base surface, so for example the ceiling of a room, directly on this or suspended from this and are designed in terms of their light output such that they are, for example, an obliquely located below the mounting position of the lamp wall illuminate. Compared to a luminaire which is primarily intended to illuminate an area located vertically below it, and which accordingly has a rather symmetrical light output, the light distribution curve of a wall washer is rather asymmetrical.
Um diese spezielle Art der Lichtabstrahleigenschaft erzielen zu können, kommen spezielle Optiken zum Einsatz, mit deren Hilfe das von der Lichtquelle abgegebene Licht auf den zu beleuchtenden Wandbereich gerichtet werden kann. Hierbei haben sich in der Vergangenheit insbesondere Reflektoren bewährt, da mit deren Hilfe verhältnismäßig einfach die gewünschte asymmetrische seitliche Lichtabstrahlung erzielt werden kann. Aus dem Stand der Technik sind diesbezüglich unterschiedlichste Varianten zur Realisierung eines derartigen Wallwashers bekannt.In order to be able to achieve this special type of light emission characteristic, special optics are used, with the aid of which the light emitted by the light source can be directed onto the wall area to be illuminated. Reflectors have proven to be particularly useful in the past, since with their help the desired asymmetrical lateral light emission can be achieved relatively easily. From the state of the art, various variants for the realization of such a wall washer are known in this regard.
Der Stand der Technik zeigt allerdings auch, dass bei den bislang bekannten Lösungen die Leuchten eine gewisse Mindestgröße aufweisen müssen, um eine zufriedenstellende Ausleuchtung des Wandbereichs erzielen zu können. Je kleiner die Abmessungen der Leuchte sind, desto schwieriger wird es, eine gleichmäßige homogene Beleuchtung zu erzielen. Dies stellt ein Problem dar, da eine ungleichmäßige Lichtverteilung auf dem zu beleuchtenden Wandbereich in der Regel nicht akzeptabel ist, gleichzeitig jedoch das allgemeine Bestreben dahin geht, Leuchten kleiner und kompakter zu gestalten.However, the prior art also shows that in the solutions known hitherto the luminaires must have a certain minimum size in order to be able to achieve a satisfactory illumination of the wall area. The smaller the dimensions of the luminaire, the more difficult it becomes to achieve uniform homogeneous illumination. This is a problem because uneven distribution of light on the wall area to be illuminated is generally unacceptable, but at the same time the general aim is to make luminaires smaller and more compact.
Der vorliegenden Erfindung liegt deshalb die Aufgabenstellung zugrunde, eine neuartige Möglichkeit zur Realisierung eines Wallwashers anzugeben, bei der trotz verhältnismäßig kleiner Bauweise der Leuchte ein homogenes, gleichmäßiges Lichtfeld auf einem zu beleuchtenden Wandbereich erzielt werden kann.The present invention is therefore based on the object to provide a novel way to realize a Wallwashers, in spite of a relatively small construction of the lamp, a homogeneous, uniform light field can be achieved on a wall area to be illuminated.
Die Aufgabe wird durch eine Leuchte, welche die Merkmale des Anspruchs 1 aufweist, gelöst. Vorteilhafte Weiterbildungen der Erfindung sind Gegenstand der abhängigen Ansprüche.The object is achieved by a luminaire having the features of claim 1. Advantageous developments of the invention are the subject of the dependent claims.
Die erfindungsgemäße Lösung sieht eine Kombination verschiedener Maßnahmen vor, die einerseits zu einer kleinen Bauweise der Leuchte bzw. des Wallwashers führen, andererseits es gestatten, eine gleichmäßige und homogene Lichtverteilung zu erzielen. Dabei ist zunächst vorgesehen, dass als Leuchtmittel LEDs zum Einsatz kommen, welche in einer Längsrichtung der Leuchte hintereinander angeordnet sind. Das von diesen LEDs abgegebene Licht wird dabei nicht unmittelbar durch die Leuchte abgestrahlt sondern mit Hilfe eines konkav geformten Reflektors derart rückreflektiert, dass eine Lichtabgabe seitlich nach unten hin erfolgt. Die Leuchtmittel bzw. LEDs sind hierbei im oberen Bereich des Reflektors derart angeordnet, dass sie Licht im Wesentlichen entgegengesetzt zu der Lichtabstrahlrichtung der Leuchte auf den Reflektor emittieren.The solution according to the invention provides for a combination of different measures which, on the one hand, lead to a small construction of the lamp or the wall washer, on the other hand, make it possible to achieve a uniform and homogeneous light distribution. It is initially provided that LEDs are used as the light source, which are arranged one behind the other in a longitudinal direction of the lamp. The light emitted by these LEDs light is not emitted directly through the lamp but with the help of a concave reflector reflected back so that a light output is made laterally downwards. The lamps or LEDs are in this case arranged in the upper region of the reflector so that they light in Essentially opposite to the light emission direction of the lamp to emit the reflector.
Insbesondere für den Fall, dass die Abmessungen der Leuchte sehr klein gehalten werden sollen, hat sich jedoch gezeigt, dass durch diese Maßnahmen allein noch keine ausreichend gute Lichtverteilung erzielt werden kann. Dementsprechend ist als dritte wesentliche Maßnahme erfindungsgemäß vorgesehen, dass unterhalb der Leuchtmittel ein Diffusor angeordnet ist, der sich bis zu dem Reflektor hin erstreckt. Es hat sich gezeigt, dass durch den Einsatz dieses zusätzlichen Diffusors Unregelmäßigkeiten in der Lichtverteilung nahezu eliminiert werden können und letztendlich ein sehr homogenes sogenanntes Lichtfeld an dem zu beleuchtenden Wandbereich erzielt wird. Erfindungsgemäß wird deshalb eine Leuchte vorgeschlagen, welche Leuchtmittel aufweist, die in einer Längsrichtung der Leuchte hintereinander angeordnete LEDs aufweisen. Ferner ist ein Reflektor vorgesehen, der in einer Ebene senkrecht zu einer Längsachse der Leuchte konkav gekrümmt ist, wobei die Leuchtmittel im oberen Bereich des Reflektors derart angeordnet sind, dass sie Licht im Wesentlichen entgegengesetzt zu einer Lichtabstrahlrichtung der Leuchte auf den Reflektor emittieren. Schließlich ist erfindungsgemäß unterhalb der Leuchtmittel ein Diffusor angeordnet, der sich im Wesentlichen von einer Ebene, in der die Leuchtmittel angeordnet sind, bis zu dem Reflektor hin erstreckt, und wobei der Diffusor im Wesentlichen senkrecht zu dieser Ebene ausgerichtet ist und der Reflektor im oberen Bereich eine stärkere Krümmung aufweist als im unteren Bereich.In particular, in the event that the dimensions of the lamp to be kept very small, but it has been shown that alone can not be achieved by these measures sufficiently good light distribution. Accordingly, it is provided according to the invention as a third essential measure that a diffuser is arranged below the luminous means, which extends up to the reflector. It has been shown that by using this additional diffuser irregularities in the light distribution can be almost eliminated and ultimately a very homogeneous so-called light field at the wall area to be illuminated is achieved. The invention therefore proposes a luminaire which has luminous means which have LEDs arranged one after the other in a longitudinal direction of the luminaire. Furthermore, a reflector is provided, which is concavely curved in a plane perpendicular to a longitudinal axis of the luminaire, wherein the luminous means in the upper region of the reflector are arranged such that they emit light substantially opposite to a light emission direction of the luminaire onto the reflector. Finally, according to the invention, a diffuser is arranged below the luminous means, which diffuser extends substantially from a plane in which the luminous means are arranged to the reflector, and wherein the diffuser is oriented substantially perpendicular to this plane and the reflector is aligned in the upper region has a greater curvature than at the bottom.
Die Erfindung ist dadurch gekennzeichnet, dass der Diffusor den Reflektor in zwei Bereiche unterteilt, wobei der erste Reflektorbereich der obere Bereich des Reflektors ist und den LEDs zugewandt ist und wobei der zweite Reflektorbereich der untere Bereich des Reflektors ist und sich auf der den LEDs abgewandten Seite des Diffusors befindet.The invention is characterized in that the diffuser divides the reflector into two regions, wherein the first reflector region is the upper region of the reflector and faces the LEDs, and wherein the second reflector region is the lower region of the reflector and is on the side facing away from the LEDs the diffuser is located.
Dabei sind die Leuchtmittel, also die LEDs, abgesehen von demjenigen Bereich des Reflektors, dem sie gegenüberliegen, durch den Diffusor vollständig von dem Reflektor getrennt. Die Leuchtmittel, der obere Endbereich des Reflektors sowie der Diffusor umschließen also eine kleine, in Längsrichtung der Leuchte verlaufende so genannte Mischkammer, in der im Wesentlichen die angestrebte homogene Verteilung des Lichts vorgenommen wird. Erst das aus dieser Mischkammer über den Diffusor austretende Licht, welches dann durch den Reflektor in Lichtabstrahlrichtung der Leuchte hin reflektiert wird, kann dann die Leuchte verlassen. Sämtliches Licht, welches von der Leuchte abgegeben wird, wurde also zunächst durch den Diffusor beeinflusst, wodurch letztendlich die angestrebte gleichmäßige Lichtverteilung erhalten werden kann.In this case, the lighting means, so the LEDs, apart from that region of the reflector, which they are opposite, completely separated by the diffuser from the reflector. The bulbs, the upper end of the reflector and the diffuser thus enclose a small, running in the longitudinal direction of the lamp so-called mixing chamber in which substantially the desired homogeneous distribution of the light is made. Only the light emerging from this mixing chamber via the diffuser, which is then reflected by the reflector in Lichtabstrahlrichtung the light out, then leave the light. All the light that is emitted by the lamp, so initially through the diffuser influenced, which ultimately the desired uniform light distribution can be obtained.
Gemäß der Erfindung ist der Reflektor konkav gekrümmt, wobei vorgesehen ist, dass er im oberen Bereich, also demjenigen Bereich, dem die Leuchtmittel zugeordnet sind, eine stärkere Krümmung aufweist als im unteren Bereich. Hierdurch ist gewährleistet, dass auch solches Licht, welches von den LEDs unter verhältnismäßig flachen Winkeln abgegeben wird, noch effizient durch den Reflektor innerhalb der oben erwähnten Mischkammer reflektiert und über den Diffusor in den eigentlichen für die Lichtabgabe der Leuchte verantwortlichen Reflektorbereich gelenkt werden kann.According to the invention, the reflector is concavely curved, it being provided that it has a greater curvature in the upper region, ie the region to which the illuminants are assigned, than in the lower region. This ensures that even such light, which is emitted from the LEDs at relatively shallow angles, still efficiently reflected by the reflector within the above-mentioned mixing chamber and can be directed through the diffuser in the actual responsible for the light output of the lamp reflector area.
Zumindest vor dem unteren Bereich des Reflektors kann dabei vorzugsweise eine aus Glas oder PMMA bestehende Abdeckscheibe angeordnet sein. Die Anordnung dieser Abdeckscheibe kann dabei insbesondere derart sein, dass sie sich etwa von dem dem Reflektor abgewandten Ende des Diffusors bis zu der Unterkante des Reflektors hin erstreckt. Insbesondere kann sich dabei die Abdeckscheibe im Wesentlichen in der Ebene, in der auch die Leuchtmittel angeordnet sind, erstrecken.At least in front of the lower region of the reflector can preferably be arranged a glass or PMMA existing cover. The arrangement of this cover can be in particular such that it extends approximately from the reflector facing away from the end of the diffuser to the lower edge of the reflector. In particular, the cover may extend substantially in the plane in which the bulbs are arranged.
Die verschiedenen Komponenten der erfindungsgemäßen Leuchte werden vorzugsweise von einem profilierten Basiskörper, der beispielsweise durch ein Aluminiumstrangpressprofil gebildet sein kann, gehalten. Dieses kann sowohl für den unmittelbaren Anbau einer Decke als auch für die Befestigung an einem Trägerelement, beispielsweise einer so genannten Tragschiene eines Lichtbandsystems oder dergleichen ausgebildet sein.The various components of the lamp according to the invention are preferably held by a profiled base body, which may be formed for example by an aluminum extruded profile. This can be designed both for the direct installation of a ceiling and for attachment to a support element, for example a so-called support rail of a lighting system or the like.
Nachfolgend soll die Erfindung anhand der beiliegenden Zeichnung näher erläutert werden. Es zeigen:
- Figur 1
- ein Ausführungsbeispiel eines erfindungsgemäßen Wallwashers in perspektivischer Ansicht;
- Figur 2
- eine perspektivische Schnittdarstellung des erfindungsgemäßen Wallwashers, der die Anordnung der verschiedenen Komponenten für die Lichtabgabe entnommen werden kann;
- Figur 3
- eine weitere Schnittdarstellung des Wallwashers und
- Figur 4
- die Anordnung des erfindungsgemäßen Wallwashers an der Tragschiene eines Lichtbandsystems.
- FIG. 1
- an embodiment of a wall washer according to the invention in a perspective view;
- FIG. 2
- a perspective sectional view of the invention Wallwashers, where the arrangement of the various components for the light output can be removed;
- FIG. 3
- another sectional view of the Wallwashers and
- FIG. 4
- the arrangement of the invention Wallwashers on the mounting rail of a lighting system.
So ist zunächst für die erfindungsgemäße Leuchte 100 wesentlich, dass das von den Leuchtmitteln abgegebene Licht nicht unmittelbar auf die zu beleuchtende Wand gerichtet wird sondern stattdessen im Rahmen einer so genannten Rückreflexion indirekt abgestrahlt wird. Im vorliegenden Fall kommen als Leuchtmittel LEDs 5 zum Einsatz, welche in Längsrichtung I der Leuchte 100 hintereinander angeordnet und derart ausgerichtet sind, dass sie ihr Licht zunächst primär in entgegengesetzter Richtung zur Hauptabstrahlrichtung A der Leuchte 100 abgeben. Die Anordnung der LEDs 5 erfolgt dabei mit Hilfe einer oder mehrerer Platinen 6, die vorzugsweise gegenüber der durch die Rückwand 101 definierten Vertikalen leicht geneigt in einem Winkel α von etwa 10° bis 20°, insbesondere etwa 15° ausgerichtet sind.For example, it is essential for the
Die eigentliche Umlenkung des von den LEDs 5 emittierten Lichts in Richtung der Lichtabstrahlrichtung A der Leuchte 100 erfolgt mit Hilfe eines Reflektors 10, der sich von einer Unterseite des Leuchtengehäuses 101 bis zu einem Bereich knapp oberhalb der LEDs 5 hin erstreckt. Dieser in Längsrichtung I der Leuchte 100 unveränderlich ausgeführte Reflektor 10 weist in einer Ebene senkrecht zu der Längsrichtung I eine konkave Form auf, wobei er hierfür entweder entsprechend abgewinkelt ausgeführt sein könnte, erfindungsgemäß jedoch wie dargestellt kontinuierlich konkav gekrümmt ausgebildet ist. Der vorzugsweise aus einem hochreflektierenden Material bestehende Reflektor 10 dient also dazu, als so genannter Rückreflektor das Licht schräg seitlich zur Unterseite hin abzugeben.The actual deflection of the light emitted by the LEDs 5 in the direction of the light emission direction A of the
Versuche haben jedoch gezeigt, dass im Falle kompakter Abmessungen der Leuchte 100 die Funktion des Reflektors 10 allein nicht ausreichend ist, um für eine zufriedenstellend homogene Ausleuchtung zu sorgen. Um das Resultat der Beleuchtung zu verbessern, kommt dementsprechend erfindungsgemäß ein zusätzliches optisches Element in Form eines Diffusors 20 zum Einsatz, der entsprechend den Darstellungen knapp unterhalb der LEDs 5 angeordnet ist. Dieser Diffusor 20 ist etwa in einem rechten Winkel zur Montagefläche für die LED-Platinen 6 ausgerichtet und erstreckt sich von den LED-Platinen 6 bis zur Reflektorwand hin. Wie erkennbar ist, umschließen also die LED-Platinen 6, der Diffusor 20 sowie der obere Endbereich 11 des Reflektors 10 einen im Querschnitt etwa viertelkreisförmigen bzw. viertelellipsenförmigen Hohlraum, der als so genannte Mischkammer 25 dazu dient, die Lichtabgabe der erfindungsgemäßen Leuchte 100 zu optimieren. Insbesondere wird dies dadurch erzielt, dass alle Lichtstrahlen, welche letztendlich über den unterhalb des Diffusors 20 befindlichen Bereich des Reflektors 10 reflektiert und in Abstrahlrichtung A von der Leuchte abgegeben werden, zumindest einmal durch den Diffusor 20 beeinflusst werden. Da darüber hinaus ein Großteil des Lichts zuvor auch noch von dem oberen Endbereich 11 des Reflektors 10 reflektiert wird, findet also tatsächlich eine optimale Durchmischung der Lichtstrahlen statt, derart, dass die LEDs 5 als Einzellichtquellen aufgelöst und auch sonstige Unregelmäßigkeiten ausgeglichen werden. Letztendlich wird also durch den Einsatz des zusätzlichen Diffusors 20 die Qualität der Lichtabgabe der Leuchte 100 deutlich verbessert.Experiments have shown, however, that in the case of compact dimensions of the
Wie insbesondere der Schnittdarstellung von
Wie den beiden Darstellung der
Der Diffusor 20 selbst wird vorzugsweise durch eine Diffusorfolie gebildet, welche idealerweise zumindest eine gewisse Eigenstabilität aufweist, so dass sie ihre Form und Anordnung in der dargestellten Weise beibehält. Als besonders vorteilhaft hat sich hierbei eine Folie, die unter der Bezeichnung Brightview Folie Circular 15 Grad vertrieben wird, herausgestellt, da bei Verwendung dieser Folie besonders vorteilhafte Lichtabstrahleigenschaften erzielt werden können. Dies gilt auch für den Fall, dass die Leuchte sehr kompakte Abmessungen von beispielsweise 40x50mm aufweist.The
Die Halterung und Anordnung der verschiedenen Komponenten der erfindungsgemäßen Leuchte 100 erfolgt wie bereits erwähnt vorzugsweise mit Hilfe eines Aluminiumstrangpressprofils, dessen Konfiguration wiederum den Schnittdarstellung der
Der Aluminiumprofilkörper weist dabei mehrere in Längsrichtung verlaufende Nuten oder Kanäle auf, die ein einfaches Einsetzen der oben beschriebenen optischen Komponenten ermöglichen. Erkennbar ist beispielsweise, dass die Abdeckscheibe 30 mit ihrem oberen und unteren Ende jeweils in in Längsrichtung verlaufenden Nuten aufgenommen ist, so dass sie in einfacher Weise von einer Stirnseite her in den Profilkörper eingeschoben werden kann. In vergleichbarer Weise erfolgt auch eine Aufnahme und Halterung des Reflektors 10, der einerseits an seinem oberen und unteren Ende, zusätzlich jedoch auch an seiner Rückseite durch den Profilkörper abgestützt wird. Durch entsprechende Ausgestaltung des Aluminiumprofilkörpers kann dabei erreicht werden, dass der Reflektor selbstständig beim Einschieben die dargestellte Krümmung annimmt. Schließlich erfolgt auch die Lagerung des Diffusors 20 in einer entsprechenden in Längsrichtung verlaufenden Ausnehmung des Profilkörpers, so dass - abgesehen von den LED-Platinen 6 - alle wesentlichen Komponenten der Leuchte 100 ohne zusätzliche Halterungsmittel an dem Profilkörper gehalten werden.The aluminum profile body in this case has a plurality of longitudinally extending grooves or channels, which allow easy insertion of the optical components described above. It can be seen, for example, that the
Nachdem sämtliche Komponenten in dem Profilkörper angeordnet wurden, kann dieser dann stirnseitig durch zwei entsprechend geformte Endkappen 120 verschlossen werden. Hierfür dienen beispielsweise zwei weitere in Längsrichtung verlaufende Kanäle, die das Aufsetzen und zuverlässige Halten der Endkappen 120 ermöglichen.After all components have been arranged in the profile body, this can then be closed at the end by two correspondingly shaped end caps 120. For this purpose, for example, serve two more longitudinally extending channels that allow the placement and reliable holding the
Eine denkbare Anordnung des erfindungsgemäßen Wallwashers 100 an einem Träger ist in
Claims (5)
- Lamp (100) having
lighting means comprising LEDs (5) which are arranged one behind the other in a longitudinal direction (I) of the lamp (100), and a reflector (10), which is concavely curved in a plane perpendicular to the longitudinal direction (I) of the lamp (100), wherein the lighting means are arranged in the upper region (11) of the reflector (10) such that they emit light substantially opposite to a light emission direction (A) of the lamp (100) onto the reflector (10),
wherein a diffuser (20), which substantially extends from a plane in which the lighting means are arranged to the reflector (10), is arranged below the lighting means, and
wherein the diffuser (20) is oriented substantially perpendicular to said plane and the reflector (10) has a greater curvature in the upper region (11) than in the lower region,
characterized in that
the diffuser (20) divides the reflector (10) into two regions, wherein the first reflector region is the upper region (11) of the reflector (10) and faces toward the LEDs (5), and wherein the second reflector region is the lower region of the reflector (10) and is located on the side of the diffuser (20) facing away from the LEDs (5). - Lamp according to any one of the preceding Claims, characterized in that said lamp comprises a cover plate (30) which preferably consists of glass or PMMA and is arranged in front of the lower region of the reflector (10).
- Lamp according to Claim 2, characterized in that the cover plate (30) extends from the end of the diffuser (20) facing away from the reflector (10) to the lower edge of the reflector (10).
- Lamp according to Claim 2 or 3, characterized in that the cover plate (30) extends substantially in the plane in which the lighting means are arranged.
- Lamp according to any one of the preceding Claims, characterized in that it is a wallwasher.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202014104900.2U DE202014104900U1 (en) | 2014-10-15 | 2014-10-15 | Lamp for use as a wallwasher |
PCT/EP2015/073864 WO2016059148A1 (en) | 2014-10-15 | 2015-10-15 | Wallwasher |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3207308A1 EP3207308A1 (en) | 2017-08-23 |
EP3207308B1 true EP3207308B1 (en) | 2019-06-26 |
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EP15781100.1A Active EP3207308B1 (en) | 2014-10-15 | 2015-10-15 | Wallwasher |
Country Status (4)
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US (1) | US10222028B2 (en) |
EP (1) | EP3207308B1 (en) |
DE (1) | DE202014104900U1 (en) |
WO (1) | WO2016059148A1 (en) |
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JP1553416S (en) * | 2015-06-18 | 2016-07-11 | ||
CN107781787B (en) | 2016-08-29 | 2020-12-08 | 查克森科技有限公司 | Lighting device and lighting system |
DE202018104615U1 (en) * | 2018-08-10 | 2019-11-14 | Zumtobel Lighting Gmbh | Luminaire with variable light output |
USD925805S1 (en) * | 2018-11-21 | 2021-07-20 | Ansorg Gmbh | Ceiling lamp |
DE102019106678A1 (en) * | 2019-03-15 | 2020-09-17 | Siteco Gmbh | Modular wall and shelf washers |
US11175012B1 (en) * | 2020-07-08 | 2021-11-16 | Abl Ip Holding Llc | Indirect light wall pack |
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US5115384A (en) * | 1990-11-15 | 1992-05-19 | Arriflex Corporation | Soft light |
US5199782A (en) * | 1991-05-23 | 1993-04-06 | Glen Co. Breda & Associates, Inc. | Illumination system for vanity or the like |
US5709460A (en) * | 1996-12-17 | 1998-01-20 | Covelight Corporation | Indirect fluorescent lighting fixture |
DE29906806U1 (en) * | 1999-04-19 | 2000-08-31 | Erco Leuchten | Reflector luminaire that can be used as a floodlight, e.g. is designed as a wall or ceiling washer |
US6663262B2 (en) * | 2001-09-10 | 2003-12-16 | 3M Innovative Properties Company | Backlighting transmissive displays |
US6789914B1 (en) * | 2003-05-29 | 2004-09-14 | Hubbell Incorporated | Luminaire providing direct and indirect lighting |
DE102004051661B3 (en) * | 2004-10-22 | 2006-03-30 | Erco Leuchten Gmbh | Illumination system for whole or part of building wall has tube with lights of different colors in triangular array, with reflector portion and transparent portion admitting light to curved mirror |
US7740387B2 (en) * | 2006-05-24 | 2010-06-22 | 3M Innovative Properties Company | Backlight wedge with side mounted light source |
DE102007001702B4 (en) | 2007-01-11 | 2010-04-08 | Airbus Deutschland Gmbh | Lighting device of an aircraft |
WO2008098360A1 (en) * | 2007-02-16 | 2008-08-21 | Koninklijke Philips Electronics N.V. | Optical system for luminaire |
WO2008146229A2 (en) * | 2007-05-29 | 2008-12-04 | Koninklijke Philips Electronics N.V. | Illumination system, luminaire and backlighting unit |
DE102007059607A1 (en) | 2007-12-11 | 2009-06-18 | Bartenbach, Christian, Ing. | Wall and / or ceiling light |
US8038321B1 (en) * | 2008-05-06 | 2011-10-18 | Koninklijke Philips Electronics N.V. | Color mixing luminaire |
US8038327B1 (en) * | 2008-05-06 | 2011-10-18 | Genlyte Thomas Group Llc | Color mixing luminaire |
US8579473B2 (en) * | 2008-09-12 | 2013-11-12 | Koninklijke Philips N.V. | Luminaire for indirect illumination |
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2014
- 2014-10-15 DE DE202014104900.2U patent/DE202014104900U1/en not_active Expired - Lifetime
-
2015
- 2015-10-15 WO PCT/EP2015/073864 patent/WO2016059148A1/en active Application Filing
- 2015-10-15 US US15/503,166 patent/US10222028B2/en active Active
- 2015-10-15 EP EP15781100.1A patent/EP3207308B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
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EP3207308A1 (en) | 2017-08-23 |
US20170234508A1 (en) | 2017-08-17 |
DE202014104900U1 (en) | 2016-01-18 |
US10222028B2 (en) | 2019-03-05 |
WO2016059148A1 (en) | 2016-04-21 |
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