EP3199869B1 - Beleuchtungsvorrichtung - Google Patents

Beleuchtungsvorrichtung Download PDF

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Publication number
EP3199869B1
EP3199869B1 EP17161523.0A EP17161523A EP3199869B1 EP 3199869 B1 EP3199869 B1 EP 3199869B1 EP 17161523 A EP17161523 A EP 17161523A EP 3199869 B1 EP3199869 B1 EP 3199869B1
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EP
European Patent Office
Prior art keywords
reflector
shell
facade
illuminated
light
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EP17161523.0A
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German (de)
English (en)
French (fr)
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EP3199869A1 (de
Inventor
Christian Bartenbach
Wilfried Pohl
Christian Reisecker
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Bartenbach Holding GmbH
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Bartenbach Holding GmbH
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Publication of EP3199869A1 publication Critical patent/EP3199869A1/de
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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
    • F21V7/09—Optical design with a combination of different curvatures
    • 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
    • F21V7/04—Optical design
    • F21V7/048—Optical design with facets structure
    • 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 lighting device with at least one row of spotlights, a spotlight for such a lighting device for illuminating a surface piece, and a reflector for such a spotlight, the reflector for essentially completely capturing the light of a point-shaped light source radiating into a half space overall is approximately half-shell-shaped and is formed by at least two shell halves.
  • Facade spotlights that use an LED as a light source have recently been proposed.
  • a large number of such LEDs can be arranged next to one another in the form of a light band in order to illuminate the facade over its entire width or at least a part thereof.
  • Such light strips are regularly arranged at a distance from the facade at the upper end of the facade or at the upper end of a facade piece to be illuminated, so that they illuminate the facade of the building obliquely downwards towards the floor.
  • the facades to be illuminated can in this case be external facades or internal facades, for example of inner or light courtyards, but also walls of interior rooms, halls, inner courtyards or the like, or also ceilings and floors, for example by close to the floor Wall-mounted spotlights can be flooded, or generally at least approximately flat surfaces can be illuminated in a corresponding manner.
  • approximately flat surfaces are uniformly illuminated with a row of spotlights that are arranged at a small distance from the illuminated surface at an edge region of the illuminated surface, with obliquely grinding radiation.
  • Facade spotlight arrangements of this type with LEDs appear light and elegant. Since they can be made small, they hardly interfere with the facade, wall or ceiling. In addition, interesting optical effects can be achieved through the large number of spotlights, for example LEDs of different colors can illuminate different sections of the facade differently. It is also possible in a simple manner to vary the lighting color over time. LEDs are also easy to maintain and energy efficient.
  • facade spotlight arrangements with point light sources can be improved with regard to the uniformity of the facade illumination and the lack of glare, the challenge being in particular to achieve this with spotlights arranged very close to the facade and illuminating comparatively large pieces of facade.
  • the ratio of the height of the facade or wall piece to be illuminated to the facade spacing of the spotlights should often be 4: 1 or more, often even 10: 1 or more, with typical ratios being in the range from 5: 1 to 15: 1, which is a great challenge in terms of the mentioned uniformity with simultaneous glare-free.
  • a projection device with a reflector which is designed in the form of a half shell overall and is composed of three shell parts, so that the reflector has a three-shell curvature overall, a constriction being provided between each of the three shell parts.
  • the light source inside the reflector shell emits in all directions, so that the emitter emits partly reflected light and partly direct light.
  • the writings show more spotlights JP H10 261302 A , GB00506 A and WO 2011/036340 .
  • the US 2007/0171631 shows a wallwasher in which the emitters are assigned a reflector, with the aid of which the light is to be homogenized. Furthermore shows the DE 20 2005 011 747 a wallwasher with LEDs as light sources, with a good color mixing of the different light colors of the LEDs being achieved by means of a diffuser element. By means of a reflector, the light from the LEDs is reflected on a side wall before the light rays strike the diffuser element, which is designed as a sandblasted glass plate.
  • EP 21 16 761 A1 facade lighting with "angular" radiating spotlights.
  • the light emitted by the light sources of the spotlights is transformed into a square, pyramid-shaped beam of rays by means of free-form lenses in order to illuminate square pieces of facade surface.
  • Notice also shows EP 22 16 588 A1 a spotlight with a bell-shaped reflector, which is made up of several reflector segments.
  • the publication also shows US 2004/0114366 A1 an LED spotlight, to which a reflector is assigned, which comprises three reflector areas.
  • a reflector In order to radiate around the LEDs and their operating circuit board located in the reflector and to block any reflected light from the LEDs and their operating circuit board, the inner reflector region located below the LEDs throws the reflected light onto an edge region the reflector, from which the light is then emitted by redirection.
  • the object of the present invention is to create an improved facade / wall / floor lighting device of the type mentioned which avoids the disadvantages of the prior art and advantageously develops the latter.
  • bright facade / wall lighting with high uniformity and little, ideally no glare in directions parallel to the facade / wall should be achieved, which allows a high installation position above the illuminated facade / wall piece or sunk into an overlying cornice or ceiling piece.
  • this object is achieved by a reflector according to claim 1 and a spotlight with such a reflector according to claim 5 and a lighting device with such a spotlight according to claim 10.
  • Advantageous embodiments of the invention are the subject of the dependent claims.
  • all or some of the reflectors of the lighting device are each approximately double-bulb-shaped or twin-shell-shaped with a transition ridge between the two shell halves that is convexly curved or tapering on the reflector surface.
  • the reflector surface and / or each of its shell-shaped halves can in particular be designed as a free-form surface.
  • the two shell halves of a respective reflector together form an approximately double pear-shaped half shell, which has an essentially gap-shaped constriction formed by the transition region of the two shell halves.
  • the reflectors can each be formed in one piece and the shell halves can be connected in one piece. Depending on the light distribution or deflection to be achieved, the mentioned constriction can extend in different directions or planes of the reflector shell.
  • constriction forms the connection area or the connection between the two shell halves.
  • the said constriction extends over the reflector shell and has a depth or height that decreases from one side of the reflector to the opposite side of the reflector.
  • the two shell halves merge into one another more harmoniously and are less separated from one another or have a less pronounced or less pronounced transition.
  • a suitable optic assigned to the light source instead of a rotationally symmetrical or orange-section-like light cone to give the light intensity distribution of the punctiform light source a particularly oblique, pyramid-like asymmetry in order to illuminate a preferably rectangular facade piece on the facade as evenly as possible.
  • the multiple light sources can hereby complement each other much better, since geometrically regular, in particular rectangular, illuminated facade pieces can be placed on top of one another or evenly blended.
  • the facade radiators can be aligned essentially parallel to one another, ie it is not necessary to achieve the desired uniformity by tilting the radiator axes.
  • the emitters each have a previously mentioned approximately half-shell-shaped reflector, which essentially completely captures the light from the associated light source and throws it onto a particularly approximately rectangular area piece, the reflectors each being composed of two shell halves, each of which shell halves reflects the light captured in each case can distribute the entire area illuminated by the reflector. Due to the double-shelled curvature of the reflectors, the illuminated area is irradiated twice, so to speak, from each reflector, resulting in a high degree of uniformity the illumination of the entire area illuminated by a reflector is achieved without light-dark edges.
  • the light source does not cast a shadow, but rather that the light around the light source is essentially completely thrown onto the facade or wall, ceiling or floor surface, as a result of which a high lighting efficiency with efficiencies of preferably more than 80%, in particular more than 90% can also be achieved.
  • a very compact, in particular flat, arrangement of the reflectors can be achieved, which ensures a light, unobtrusive appearance and enables space-saving installation under or in cornices or adjacent ceiling or wall sections.
  • the contouring of the half-shell or shell-shaped reflectors or their curvature halves is such that the beam path is reflected and converged by the deflection on the reflector surface or a reflector section irradiated by the light source, which - when viewed through the light source - is perpendicular the facade piece to be illuminated - offset to one side by the light source, throws the captured light onto a surface piece that is on the opposite side of the light source.
  • Each of the shell halves of the reflector is designed to work in double convergence, so that the beam path emanating from one shell half - roughly speaking, roughly - is a particularly oblique double pyramid or, depending on the circumferential contour of the area to be illuminated, a particularly oblique double cone or a similarly double convergent Radiation body forms.
  • Such a double convergent design of the reflector shell sections enables the light emitted by the light source, in particular emitted in a half-space, to be captured essentially completely with only one overall half-shell-shaped reflector and to radiate essentially completely past the light source onto a predetermined area.
  • the light can be radiated through the plurality of shell halves on different sides of the light source, so that the light source in an at least approximately recessed area of the reflected beam path sits and generates no losses due to shadowing.
  • a high degree of efficiency can be achieved, since the light rays emitted by the light source only have to be reflected once and, in this respect, reflection losses occur only once.
  • the position of the spotlight can be used almost without restriction, since the light source can sit more or less directly between the reflector and the surface to be illuminated.
  • the different shell halves of a reflector do not have to form "halves" in the sense of 50% of the total reflector surface, but can form different surface parts, for example smaller and larger surface parts of the approximately half-shell-shaped reflector.
  • rectangular facade pieces in particular in the manner mentioned, but alternatively also differently contoured, limited area pieces such as, for example, polygons such as hexagons, ovals or almost any contoured area pieces of a surface to be illuminated, at least approximately flat, are uniform and glare-free be illuminated.
  • the shell halves of a reflector can in each case in particular be contoured in such a way that a lower shell half edge portion illuminates an upper edge portion of the illuminated facade piece and / or an upper shell half edge portion illuminates a lower edge portion of the illuminated facade piece.
  • an elevated installation position of the facade emitters can be achieved essentially completely above the facade / wall section to be illuminated, so that the facade emitters do not impair the view of the illuminated facade section.
  • the aforementioned radiation reversal or mirroring can also be used for recessed installation of the facade emitters, for example in a cornice or a ceiling above the piece of facade to be illuminated, and yet the facade or wall up to the cornice or the Illuminated ceiling.
  • a corresponding reflection or convergence in the horizontal direction can also be provided and the reflector or each of its shell halves can be contoured in such a way that a right shell edge section illuminates a left edge section of the illuminated facade piece and / or a left shell edge section illuminated a right edge section of the illuminated facade piece.
  • the reflector or each of its shell halves can be contoured in such a way that a right shell edge section illuminates a left edge section of the illuminated facade piece and / or a left shell edge section illuminated a right edge section of the illuminated facade piece.
  • the reflector can advantageously be designed such that the beam cones or pyramids or lobes emitted by the shell halves each have a beam path constriction, at least approximately in a common plane, in particular at least approximately in the region of the opening cross section of the reflector or have their focus point (in the sense of the conical tips of a double cone standing on top of each other).
  • These constrictions of the beam paths of the reflected light in a common plane can be used to implement a largely concealed installation of the radiators and / or to place an aperture in front of the reflector, which lies in the common plane mentioned and in the area of the beam path constrictions , for example, has slit or hole-shaped light passage openings, the diameter or width of which is only a fraction, for example less than 1/3 or less than 1 ⁇ 4, of the diameter or the maximum width of the reflector.
  • the above-mentioned diaphragm can be formed by a tube housing, which is closed per se and encloses the light source-reflector arrangement, and which has the hole-shaped or slot-shaped light outlet openings mentioned
  • the shell halves can be of approximately the same size, but can also be of different sizes, for example when the aforementioned Constriction does not run centrally over the reflector body.
  • the term shell half therefore does not have to be understood in the sense of 50% half of the surface, but can also denote different sized surface or body pieces or shell sections.
  • the said constriction can extend in a plane that is perpendicular to the area piece to be illuminated on the one hand and perpendicular to the longitudinal direction along which the spotlights are lined up. If the spotlights are lined up approximately horizontally along an upper edge section of a facade piece to be illuminated, the reflectors can be contoured in such a way that the said constriction extends in a vertical plane. If the facade radiators are lined up approximately vertically along one side of the facade piece to be illuminated, the above-mentioned constriction can extend in a horizontal plane.
  • the reflectors are each contoured such that the light captured by the associated light source is not transformed into a circular or round light cone, but into a preferably oblique light pyramid, i.e. viewed in its entirety, the beam of rays emanating from the reflector has a polygonal, preferably approximately rectangular cross-section, so that the illuminated area piece is also polygonal or rectangular.
  • each of the two shell halves mentioned, from which an overall half-shell-shaped reflector is composed can be designed such that each shell half transforms the light captured by the associated light source into such a pyramid-shaped light bundle, the two beam pyramids emanating from the shell halves overlay in such a way that a polygonal, in particular rectangular, area piece is illuminated on the facade or surface to be illuminated.
  • the reflector / light source arrangement can be such that the respective light source is the light it emits radiates essentially completely into a half-space at least largely facing away from the surface piece to be illuminated and is arranged such that the half-space faces the reflector, the half-shell-shaped bwz. shell-shaped reflector encloses the light source to such an extent that the said half-space is covered by the reflector.
  • An axis of symmetry of the half space mentioned can be oriented exactly at right angles to the facade or wall, but can also be tilted slightly, for example at an angle of approximately 90 ° ⁇ 30 °, so that the half space is still predominantly facing away from the facade or wall is.
  • the reflectors are each contoured in such a way that the reflectors essentially direct the captured light around the associated light source and throw it onto the area to be illuminated.
  • the reflectors can be designed in such a way that the light is deflected only once at the reflector surface. The reflector can be easily redirected so that scattering losses due to multiple redirection are avoided.
  • the light sources can each be arranged in the area of the opening cross-section of the respective associated reflector within the spatial area enclosed by the reflector edge.
  • the reflector edge can at least approximately define a plane, wherein the light source assigned to the reflector can advantageously be arranged in this plane or can be positioned only slightly below or above this plane.
  • the entire half-space, in which a punctiform light source such as an LED is emitted can be enclosed and the emitted light can be essentially completely captured by the reflector.
  • an overall flat design of the light source / reflector arrangement can be achieved.
  • the light source can be arranged in the region of the longitudinal center plane of the reflector, but not exactly in the center, but to one side offset of the reflector shell.
  • the light source can be arranged offset from the constriction of the reflector from the center of the reflector to the side on which the constriction has a smaller depth.
  • the light source is offset to the side in which the said constriction is less pronounced.
  • faceting can be provided on the shell-shaped reflector surfaces.
  • Such a surface structuring with a multitude of facets can only be provided for one of the half- or quarter-shell-shaped reflector surfaces or generally only for a part of the reflector, for example in such a way that one reflector quarter-shell is faceted and the other reflector quarter-shell is smooth, which already results in a certain Uniformity can be achieved since both reflector quarter shells essentially completely irradiate the same area piece.
  • both reflector quarter shells or the entire reflector surface can be structured with such a large number of facets.
  • both halves of the reflector shell essentially completely irradiate or illuminate the common area piece can achieve a beautiful homogenization of the illuminated area.
  • the facets mentioned are advantageously made small relative to the reflector surface, preferably more than a hundred, in particular also more than two hundred facets can be arranged distributed over the reflector surface, possibly also in the form of a microfaceted surface structure.
  • the faceting can advantageously be distributed in the form of a matrix or in a cloud-shaped manner, ie the facets do not all have to be of the same size and can be arranged differently according to a cloud distribution, but overall uniformly cover the reflector surface.
  • the facets can both in the longitudinal direction as well as in the transverse direction - based on the previously explained division of the reflector surface - be formed in several rows and columns, for example in such a way that both in the longitudinal direction and in the transverse direction more than ten, in particular more than twenty rows and columns of such facets are provided .
  • the shape of the faceting can also vary, advantageously polygonal, in particular rectangular and approximately square facets or generally regularly geometrically shaped facet pieces, the extent of which in the longitudinal and transverse directions is approximately the same size, can be provided.
  • irregularly shaped surface structure shaped surface pieces can also be formed in the reflector surface, for example in the form of an orange peel structure, as can be obtained, for example, by etching the surface, or a silk matt surface structure, as is the case, for example, by sandblasting the surface is available.
  • the microfacetted surface can also improve the light mixing and make the light source / reflector system less sensitive to position and shape tolerances while improving the uniformity of the illumination.
  • the reflectors are shaped in such a way that the spotlights have a longitudinal blanking or a blanking parallel to the illuminated surface, i.e. the light intensity more or less in the direction parallel to the facade or illuminated surface goes to zero.
  • the blanking is in particular such that in a plane parallel to the facade, which passes through the row of facade radiators or is at the same distance from the facade as the facade radiators, the light intensity in a region close to the ground approaches zero.
  • Dimming is also provided in planes that lie parallel to the illuminated area between the spotlights and the illuminated area, so that, for example, people who are closer to the illuminated wall than the facade spotlights with normal viewing direction - i.e. not exactly vertically upwards - do not experience glare.
  • a glare can only occur if you approach the facade more or less directly and look upwards into the facade spotlight row.
  • the longitudinal or facade parallel blanking ensures that there is no glare.
  • the blanking on the individual spotlights can be different.
  • the facade radiators viewed in a vertical plane perpendicular to the facade, can have a blanking area of more than 270 °, preferably approximately 270 ° to 280 °, the non-masked area at the upper end of the illuminated facade piece approximately is directed at an angle of 90 ° to the facade, while at the lower end of the illuminated piece of facade the non-masked area can enclose an angle of preferably 3 ° to 10 ° with the facade.
  • the facade radiator can have a blanking area of at least 200 °, preferably 240 ° or more, in particular approximately 240 ° to 270 °, which can depend on the LED distance and the desired lighting effects, such as color fades.
  • the facade radiators can be arranged in an approximately horizontal row at the upper end of the facade piece to be illuminated, wherein the facade radiators can be arranged at a distance of approximately 0.5 to 2 m from the facade.
  • a row of facade emitters can advantageously be placed at a distance of about 1 m of the facade and illuminate the facade down to the floor, i.e. about 15 m high.
  • the ratio of the height of the facade or wall piece to be illuminated to the facade spacing of the spotlights can be 4: 1 or more, preferably 5: 1 or more, in particular also 10: 1 or more, with typical ratios to be achieved in Range from 5: 1 to 15: 1.
  • the aspect ratio mentioned cannot be determined by the height of the wall piece to be illuminated, but rather, for example, its width, namely, for example, when a wall, for example of a long corridor, is to be illuminated with spotlights arranged on the side.
  • the above-mentioned ratio is regularly determined from the extent of the illuminated area in a direction perpendicular to the direction along which the usually several emitters are lined up, and the emitter distance perpendicular to the area to be illuminated.
  • the facade radiators or their reflectors which are arranged closer to the edge of a facade surface, are designed with regard to their radiation angle or blanking spaces in order to prevent radiation beyond the lateral end of the facade.
  • the facade emitters or their reflectors arranged towards the edge of the facade are designed such that the facade piece illuminated by them is laterally approximately flush with the vertical facade edge.
  • the from the facade radiator belt i.e. The illuminated room created as a whole closes, so to speak, flush with the right and left edge of the facade, or possibly ended earlier, so that it is guaranteed in any case that there is no glare on the adjacent building facade.
  • the facade radiators therefore do not radiate beyond the edges of the facade surface assigned to them.
  • the half-shell-shaped reflectors in an advantageous further development of the invention are contoured in particular in such a way that each facade spotlight illuminates an approximately rectangular facade piece and generates an illuminance distribution thereon that runs along vertical lines over the entire facade height or entire Considered the height of the illuminated facade or surface piece is an illuminance ratio of minimum illuminance E min to maximum illuminance E max of 1:10, ie 0.1 or greater.
  • the illuminated facade piece does not have to go all the way to the floor, but can end a bit far above or a certain transition area to the floor can be provided to avoid bright radiation edges on the floor - or an adjacent wall - which are otherwise due to Assembly tolerances, but also the "radiation brush", which arises from the real expansion of the light source, which in the mathematical sense is not really punctiform, with a light source that cannot be positioned as far from the reflector as possible.
  • an illuminance ratio of minimum illuminance E min to maximum illuminance E max can advantageously be used - when viewed along vertical and / or horizontal lines over the entire facade height and / or width - of 1: 2.5, ie 0.4 or larger.
  • the aforementioned illuminance ratio even with spotlights arranged very close to the wall with the aforementioned ratio of spotlight-wall distance to extend, in particular height, the illuminated area piece from 1: 4 to 1:20, in particular 1: 5 to 1:15.
  • the reflectors of the facade emitters are advantageously designed asymmetrically in a development of the invention in such a way that the illuminance distribution of a respective facade emitter, viewed individually, has approximately semi-oval or slightly pear-shaped isoluxes on the facade piece illuminated by it, i.e. Lines along which the illuminance is the same. The course of these isoluxes clearly determines the free-form surface of the reflector, which is assigned to the light source.
  • a certain Isoluxen image is generated via the geometric relationships of the facade emitter arrangement and the free-form surface of the reflector, which characterizes the distribution of illuminance on the illuminated piece of facade, so that the shape of the reflector surface with respect to its geometry is clearly determined from the course of the Isoluxen.
  • facade lighting which is uniform for the human eye can be achieved if a plurality of facade spotlights are arranged in a row in parallel in front of the facade or wall.
  • the isoluxes mentioned can in principle be contoured differently.
  • the oval or semi-oval isoluxes of the facade piece illuminated by a facade spotlight have a ratio of height to width of at least 2: 1, the ratio mentioned advantageously also 3 : 1 or 4: 1 can be. Due to the generally elongated, slim design of the Isoluxen one can be too high illuminance at least approximately constant in the facade.
  • the light sources can each be mounted on a support arm which projects from an edge of the respective reflector over its opening cross-section, the light sources being arranged on the side of the respective support arm facing the reflector.
  • Said support arm can have an elongated, slim contour to block as little area as possible for the reflection of the light rays, for example the shape of a longitudinal web.
  • said support arms, on which the light sources are arranged can be part of a common printed circuit board which extends along the row of radiators and in the region of the reflectors each have a reflector cutout, preferably adapted to the reflector contour, the edge of which surrounds and through the respective reflector through which the reflectors can throw the captured light onto the facade or wall piece.
  • each facade spotlight can be assigned its own circuit board, although all or some of the facade spotlights can also have a common circuit board along which the light sources are lined up in order to form a common light band.
  • the facade lighting device 1 shown in the figures comprises in front of each facade 2, 3 of the building 4 a light band 5, which is essentially horizontal is arranged approximately parallel to the facade at the upper end of the respective facade 2 and 3 and - roughly speaking - is approximately as long as the facade is wide or slightly shorter.
  • Each light band 5 comprises a plurality of facade spotlights 6, each of which comprises a point-shaped light source in the form of an LED 7 and a reflector 8 assigned to the LED 7, as is the case here Fig. 7 shows.
  • the LEDs 7 can in this case be arranged on a light source support 9, which can advantageously be designed as an LED circuit board, and can be pivoted about a lying axis, so that the radiation angle of the respective facade radiator 6 relative to the facade 2 or 3 can be adjusted.
  • the reflector 8 can also be pivoted together with the LED 7.
  • the light source together with the optics in the form of the reflector 8 can advantageously be arranged in an approximately tubular housing 10 which has a slot-shaped radiation opening which can be closed with a cover glass in order to avoid contamination of the optics.
  • the housing 10 can also have other cross sections, for example round pipe cross sections.
  • the housing 10 can also act as a diaphragm and have hole-shaped or slit-shaped light passage openings 51 in the plane of constrictions 50 of the reflected light pyramids, but are otherwise designed to be closed.
  • the light source or LED 7 can be attached to a support arm 9a, which forms part of the aforementioned light source carrier board 9 and extends from the edge of the associated reflector 8 and protrudes into the opening cross section 8q of the reflector 8. Accordingly, the LED 7 arranged on the support arm 9a is arranged approximately in the plane defined by the edges of the reflector 8, the LED 7 being located within the spatial area enclosed by the said edge of the reflector.
  • Said light source carrier board 9 advantageously comprises a reflector cutout 9b, which is adapted to the circumferential contour of the reflector 8, so that the aforementioned cutout surrounds the reflector 8.
  • the reflector 8 can also be mounted or fastened on the light source carrier board 9, in particular in such a way that at least part of the reflector edge is seated on the light source carrier board 9 or extends directly above or along said carrier board 9, wherein if necessary, fastening means can be provided, for example in the form of the holding pins shown.
  • the light strip 5 is arranged at a facade height of 15 m at a distance of about 1 m in front of the facade.
  • the distance of the LEDs 7 in the light strip 5 from one another can in principle be selected differently, advantageously a more or less seamless stringing of as many LEDs as possible is provided, since this enables high illuminance on the facade to be achieved with LEDs of low intensity.
  • the LEDs or the spotlights do not emit any rotationally symmetrical light cone. Rather, the contouring of the reflectors 8 illuminates an approximately rectangular facade piece 12 from each LED 7.
  • the reflectors 8 can each be designed such that an approximately rectangular, for example approximately 15 m high and 3 m wide facade piece 12 of a single LED 7 according to FIG Fig. 4 is illuminated.
  • the radiation angle ⁇ is provided, which in the illustrated embodiment is approximately 87 ° and is oriented such that the upper edge of the radiation sector is approximately perpendicular to the facade, while on the lower edge between the facade and an angle of approximately 3 ° is provided at the edge of the radiation area, cf.
  • FIG. 3 A blanking space of 360 ° - ⁇ is thus provided in the vertical plane mentioned, cf. Fig. 3 .
  • an area with the angle ⁇ is also illuminated in a horizontal plane perpendicular to the facade, cf. Fig. 4 , which can vary depending on the distance between the facades and the density of the LEDs and is advantageous Execution can be approximately 2 x 45 ° to 2 x 60 °. Accordingly, a range of 360 ° - ⁇ is hidden in the horizontal plane mentioned.
  • each of the reflectors 8 comprises a roughly half-shell-shaped reflector body, which has an approximately - roughly speaking - round or rounded edge contour, from which the reflector body bulges in a shell-like manner to one side, so that the edge contour mentioned defines the opening cross section of the shell. More precisely, the half-shell-shaped reflector body is formed by two shell halves 8a and 8b, which are connected to one another and between them has a transition area in the form of a constriction 8c, which connects the two shell halves 8a and 8b to one another. As a result, the reflector 8 has an overall double-bulb-shaped or twin-jaw-shaped contouring, cf. Figures 9 and 10th .
  • constriction 8c forms - when the inside of the shell forming the reflector surface is viewed - a ridge-shaped elevation which extends along the central longitudinal plane of the reflector 8.
  • Figures 9 (a) and 10 (c) clarify, takes the depth or height of the constriction 8c from one side of the reflector 9 slightly towards an opposite side, and in particular towards the side which, in the installation situation, points to the surface to be illuminated, that is to say, in the case of facade radiators arranged above a facade to be illuminated, is at the bottom or forms the lower edge section 8u of the reflector 8.
  • the shell halves 8a and 8b of the reflector 8 which in total forms a half shell, can be contoured such that the light captured by each shell half 8a and 8b onto the entire surface illuminated by the reflector 8, ie the surface piece 12, according to FIG Fig. 5 can be rectangular, is distributed.
  • the beam paths of the two shell halves 8a and 8b thus essentially overlap completely, so that there are no light-dark lines or edges on the surface piece 12 to be illuminated.
  • each of the shell halves 8a and 8b is double-converging.
  • the rays deflected by an upper shell half edge 8o are directed onto a lower edge region of the facade piece 12 to be illuminated, while the rays deflected by a lower shell half edge 8u illuminate the upper edge region of the illuminated facade piece 12.
  • a right edge section of each shell half 8a and 8b illuminates a left edge section of the facade piece 12, while the left shell edge 8l irradiates a right edge section of the facade piece 12, cf. 11 (a) and 11 (b) .
  • the shell halves are each contoured in such a way that there is a unambiguous assignment, i.e. each point of the illuminated surface 12 is illuminated by exactly one point of the shell half.
  • the convergence of the beam path can on the one hand achieve that, despite uniform illumination of the facade piece 12, the light of the light source 7 captured by the reflector 8 is completely directed around the light source 7 is so that the light source 7 or its support arm 9a does not cast a shadow.
  • a very favorable, space-saving installation situation can be realized, like it is Fig. 8 shows.
  • the beam of rays generated is emitted essentially completely below - or, in the case of lateral installation, essentially completely laterally or, in the case of installation at the bottom, essentially completely above the reflector 8, so that the reflector 8 or the entire facade emitter 6 is also flush-mounted or in an adjacent ceiling or cornice can be recessed.
  • the facade piece 12 illuminated by the respective facade radiator 6 thus remains free from being covered by the facade radiator itself, as a result of which no obstructive visual barriers arise for the viewer on the illuminated wall or facade piece.
  • the reflector surfaces of the reflectors 8 can be designed to be highly reflective, advantageously have a reflectance of more than 80%, in particular more than 90%.
  • the reflector surfaces can be made slightly matt in order to make the reflector less sensitive to manufacturing shape tolerances or to achieve the desired uniformity of the illumination of the area piece even with larger shape tolerances of the reflector.
  • the reflectors 8 can have filters and / or mirror layers, for example in order to filter the captured light with regard to specific wavelength ranges, for example in order to filter out melatonin light.
  • the reflectors 8 can be provided with a surface structuring in the form of a faceting 80, which comprises a multiplicity of facets 81, which are distributed in a regular pattern over the entire reflector surface and can adjoin one another essentially so that essentially the entire surface effective reflector surface is faceted.
  • the facets 81 can be distributed both in the longitudinal direction and in the transverse direction of the reflector 8 in a plurality of rows and columns, for example in more than ten columns and ten rows per quarter shell.
  • the Facets 81 can be contoured differently, for example they can be approximately provided with rectangular circumferential contours.
  • the facet surface of a facet 81 itself can also be contoured differently, for example essentially flat or also slightly concave, for example in the sense of a flat depression in the manner of the impression of a lens.
  • FIG. 5 shows, the rectangular facade pieces 12 illuminated by an LED 7 or the associated reflectors 8 are superimposed, ie the facade pieces illuminated by one LED overlap along a vertical strip.
  • the LEDs arranged at a distance from each other and at a distance from b from the facade like this Figures 5 and 6 show, the illuminated facade pieces 12 overlap in a strip, since the width of the illuminated facade pieces 12 is greater than the distance a.
  • Said overlap strip can be quite narrow, but can also correspond to the entire facade section 12, ie each radiator 6 can illuminate the entire facade section 12.
  • the illuminance of the light strip 5 shows only a very slight variation over the entire facade height.
  • the minimum illuminance, according to Fig. 3 occurs at the lower end of the facade, the maximum illuminance E max , which is in the range of about a quarter to three quarters of the facade height, in the drawn version Fig. 3 occurs at about three quarters of the facade height, in a ratio of 1:10 or more, ie preferably 1: 5 or 1: 2.5 or even greater.
  • the radiation space of the light band 5 has lateral tear-off edges, which are advantageously approximately flush with the edges of the facade, so that glare around the corner of the building 4 is excluded.
  • FIG. 12 shows advantageous distributions of illuminance.
  • the facade height "0" which corresponds to the height of the light band 5 gives a relative illuminance of approximately 60%, which then rises up to approximately 6 m below the light band 5 up to approximately 100%, ie reaches its maximum value there .
  • the lux number then drops again to the bottom of the facade, with 10% of the maximum lux strength still being present on the floor.
  • the ratio of minimum illuminance E min to maximum illuminance E max is defined as 1:10.
  • the reflector 8 of an individual facade radiator or an individual LED 7 can be defined by an illuminance distribution as it is Fig. 13 shows.
  • the said Fig. 13 shows the isoluxes, ie the lines along which the illuminance in the facade section 12 illuminated by an LED is the same.
  • the is on the vertical axis Fig. 13 the height of the facade, more precisely the height under the respective LED, while the horizontal axis indicates the width of the illuminated facade section.
  • the isoluxes have an approximately semi-oval contour or an oval shape flattened on one end face.
  • the facade point directly opposite an LED 7 is, so to speak, the center of the Isoluxen mentioned.
  • the Isoluxen extend approximately oval-shaped or semi-oval-shaped or in the form of an oval flattened on one side, in particular on one end face, the Isoluxe indicating the highest illuminance lying in the center and being enclosed in an onion-shell shape by Isoluxen, which indicate ever lower illuminance levels.
  • the ratio of the longitudinal extent of the Isoluxen in the vertical direction to the width of the Isoluxen is more than 2: 1, ie the Isoluxen are generally quite long and slim, cf. Figure 13 .
  • the reflector 8 of one or more, possibly all of the emitters can be provided with a coating which changes the spectrum of the reflected light, so that the reflected light has a different spectrum than the light captured by the reflector and coming from the light source .
  • a coating which changes the spectrum of the reflected light, so that the reflected light has a different spectrum than the light captured by the reflector and coming from the light source .
  • melatonin-promoting or suppressing light can be generated.
  • Such a spectrally changing coating is particularly advantageous in connection with the simple reflection of the entire captured or all of the light emitted by the light source on the reflector, so that the desired spectrum change is not falsified or is not uncontrollable due to multiple reflections.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP17161523.0A 2012-08-03 2013-08-02 Beleuchtungsvorrichtung Active EP3199869B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102012015394.5A DE102012015394A1 (de) 2012-08-03 2012-08-03 Fassaden- und/oder Wandbeleuchtungsvorrichtung
PCT/EP2013/002312 WO2014019703A1 (de) 2012-08-03 2013-08-02 Beleuchtungsvorrichtung
EP13750264.7A EP2880361B1 (de) 2012-08-03 2013-08-02 Beleuchtungsvorrichtung

Related Parent Applications (2)

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EP13750264.7A Division EP2880361B1 (de) 2012-08-03 2013-08-02 Beleuchtungsvorrichtung
EP13750264.7A Division-Into EP2880361B1 (de) 2012-08-03 2013-08-02 Beleuchtungsvorrichtung

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EP3199869A1 EP3199869A1 (de) 2017-08-02
EP3199869B1 true EP3199869B1 (de) 2020-06-24

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DE (1) DE102012015394A1 (da)
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EP3217070B1 (de) 2016-03-11 2018-06-27 Prolicht GmbH Beleuchtungsvorrichtung
DE102016123006A1 (de) * 2016-11-29 2018-05-30 Erco Gmbh Wandfluter
DE202016106648U1 (de) 2016-11-29 2018-03-01 Erco Gmbh Wandfluter
DE202017103077U1 (de) * 2017-03-03 2018-06-05 Bartenbach Holding Gmbh Beleuchtungsvorrichtung
CN113007638B (zh) * 2021-03-11 2023-02-17 苏州欧普照明有限公司 洗墙灯

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JPS6465701A (en) * 1987-09-04 1989-03-13 Koito Mfg Co Ltd Vehicle head light
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WO2014019703A1 (de) 2014-02-06
EP3199869A1 (de) 2017-08-02
DE102012015394A1 (de) 2014-02-06
EP2880361A1 (de) 2015-06-10
EP2880361B1 (de) 2017-05-10
DK3199869T3 (da) 2020-09-28

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