Light

Abstract

The invention relates, among other things, to a luminaire (10) for installation in a first building wall (11) and for illuminating a second building wall (12) arranged adjacent to the first building wall, comprising a housing (13), a circuit board (14) on which several LED clusters (15a, 15b, 15c) are arranged, and a reflector arrangement (16) with a number of reflector shells (17a, 17b, 17c) corresponding to the number of LED clusters (15a, 15b, 15c), wherein the housing (13) with the reflector arrangement (16) is recessed into the first building wall (11), and wherein the reflector arrangement (16) projects outwards from the first building wall (11) with a projection area (19), wherein the luminaire (10) is covered by a cover (20), which is in particular domed and which, in the installed state, provides a light-transmitting surface. The luminaire has a cutout (21) facing the second building wall, which is emitted by the LED clusters (15a, 15b, 15c) and reflected by the reflector shells (17a, 17b,17c) allows reflected light components, including light components (18a, 18b) reflected at the overhang area (19), to pass to the second building wall (12).

Description

[0001] The invention relates to a lamp according to claim 1.

[0002] The applicant has been developing and manufacturing luminaires for illuminating building surfaces for more than eight decades.

[0003] The present patent application relates to a luminaire that is installed in a first building wall and serves to illuminate a second building wall. For example, the luminaire can be designed as a floor-mounted luminaire and serve to illuminate a vertical or substantially vertical second building wall adjacent to the floor wall.

[0004] The luminaire according to the invention is intended to illuminate the area provided by the second building wall as homogeneously as possible. If the second building wall is a vertical wall, both low and high areas of the second building wall should be illuminated evenly. Furthermore, it is desirable that the luminaire requires only a very small distance from the wall and yet still illuminates very wide areas of the second building wall homogeneously.

[0005] The object of the invention is to develop a luminaire that is suitable as a recessed luminaire for the homogeneous illumination of high and wide building surfaces and that allows only a small distance from the wall.

[0006] The invention solves this problem with the features of claim 1.

[0007] The luminaire according to the invention is designed for installation in a first building wall and for illuminating a second building wall. The second building wall adjoins, in particular, the first building wall. For example, the first building wall can be a ground wall and the second building wall a vertical or substantially vertical building wall.

[0008] The light fixture can be positioned with only a small gap to the second building wall, for example, 50 cm or 80 cm. Using such small gaps, walls up to approximately 5 m high can be illuminated homogeneously.

[0009] In cases where even higher walls, e.g. 8 m to 10 m in height, are to be homogeneously illuminated, the luminaires according to the invention can have wall distances of e.g. 100 cm to 150 cm. These small wall distances are not achievable with prior art luminaires.

[0010] The luminaire according to the invention comprises a housing, which is designed, for example, as a recessed housing and is, for example, cast into a floor wall or mounted in a cavity provided therein. Inside the housing, a circuit board is arranged on which several LED clusters are arranged.

[0011] An LED cluster according to the invention is a compact arrangement of one or more LEDs that provide a light point or a type of light point. The LEDs are therefore not arranged in large numbers on a circuit board and widely distributed along the board surface, but rather an LED cluster is a centered, light-emitting area resembling a light point. An LED cluster can, for example, comprise two high-power LEDs. An LED cluster according to the invention provides a nearly point-like or approximately point-like light source.

[0012] Within the housing of the luminaire, electronic or electrical components for supplying power to the LED clusters may be provided, e.g. control elements, controllers, drivers, and all other common components required or suitable for the operation of an LED luminaire.

[0013] The luminaire according to the invention comprises a special reflector arrangement: The reflector arrangement of the luminaire according to the invention comprises several reflector shells, the number of which corresponds to the number of LED clusters. For example, the reflector arrangement according to the invention can have two or three reflector shells and, accordingly, two or three LED clusters. Each LED cluster is assigned its own reflector shell. Each reflector shell is assigned its own LED cluster.

[0014] The reflector shells each feature a highly reflective freeform surface, designed and optimized using algorithms. The interior of each reflector shell faces the respective LED cluster. When the luminaire is installed, the circuit board containing the LED clusters is positioned between the second building wall and the reflector assembly with the reflector shells. Each reflector shell receives light from only one LED cluster, and each LED cluster emits light only, or predominantly, into only one of the reflector shells.

[0015] One embodiment of the invention comprises three LED clusters and three reflector shells. Each LED cluster comprises several LEDs, e.g., two high-power LEDs. The multiple reflector shells can be connected to one another, in particular, integrally combined to form a reflector assembly. The inner surfaces of the reflector shells are, in particular, highly reflective.

[0016] The reflector arrangement can be provided, for example, by an injection-molded plastic part that has a highly reflective coating in the area of ​​the reflector shells.

[0017] The luminaire includes a recessed housing that is embedded in the first building wall, in particular completely or predominantly completely embedded in the first building wall.

[0018] The reflector arrangement projects at least partially outwards from the first building wall with an overhang. For example, the overhang can be approximately one-fifth or one-third of the longitudinal extent of the reflector shell, or optionally half of the extent of the reflector shell. This enables illumination of areas of the second building wall that are immediately adjacent to the luminaire. In a luminaire according to the invention designed as a recessed floor luminaire, which serves to illuminate a vertical building wall, light components reflected from the overhang of the reflector shell that projects from the first building wall can be directed onto the lower areas of the vertically oriented second building wall, i.e., onto the wall areas that are immediately adjacent to the first building wall.This allows the second wall of the building to be illuminated all the way down, even close to the ground.

[0019] The luminaire according to the invention further comprises a cover which is curved, e.g., dome-shaped. The cover protects the luminaire, which is recessed into the first building wall, and the protruding area from damage and other impairments. The cover also projects from the first building wall.

[0020] The cover is opaque. It includes a cutout that is translucent, essentially a window. This window allows light to escape.

[0021] The cutout can be designed as an opening in the cover, or it can include a translucent pane, e.g. a glass pane or a plastic pane.

[0022] The cutout in the cover faces the second building wall when the light fixture is installed. It can, for example, comprise an area of ​​approximately one-fifth or one-tenth of the total surface of the cover.

[0023] Unlike conventional recessed wall luminaires, the luminaire according to the invention is not completely flush with the first building wall, but protrudes from it at least with an overhanging area of ​​the reflector arrangement. This allows lower areas of the second building wall to be illuminated vertically to also be lit.

[0024] The light emitted from an LED cluster, striking the overhanging area and being reflected there, is directed towards those areas of the second building wall that are directly adjacent to the luminaire. This ensures that these adjacent areas of the second building wall are also illuminated homogeneously.

[0025] The overhang area includes, in particular, sections of all reflector shells. Each of the majority of the reflector shells therefore protrudes from the first building wall by a certain portion and thus contributes to the overhang area.

[0026] According to the invention, the reflector arrangement comprises several reflector shells. This enables the provision of different light distributions originating from different reflector shells, whereby the light distributions can at least partially overlap. It is precisely through this overlap that a very homogeneous illumination of the second building wall can be achieved.

[0027] By distributing multiple LED clusters across the circuit board and using multiple reflector shells, each dedicated to a specific LED cluster, a more uniform radiant output can be achieved. This also enables the multiple overlaps of light distributions on the first building wall, originating from different reflector shells. In addition to optimized technology, the cooling of the LEDs on the circuit board is also simplified because the multiple LED clusters are spaced apart.

[0028] The luminaire according to the invention offers the possibility of providing an intersecting light beam characteristic, in particular a light beam characteristic that intersects itself in several respects, by appropriately designing the reflector surfaces and the reflector shells.

[0029] For example, when considering a single reflector shell, it can be designed so that light rays emitted from an LED cluster towards a lower edge of the reflector shell near the LED cluster are reflected there in such a way that they are directed onto very distant areas of the second building wall. Similarly, light components emitted from an LED cluster towards an upper edge of the reflector shell furthest from the LED cluster are reflected at the overhanging area in such a way that they are directed onto an area of ​​the second building surface located near the luminaire.

[0030] Furthermore, light components emitted from an LED cluster, initially directed towards the first, left, or front side of the reflector shell, can be reflected in such a way that they are directed towards a rear section of the second building wall located on the right side. Conversely, light components emitted from an LED cluster towards rear sections of the reflector shell located on the right side are, after reflection, directed towards a left, front section of the second building wall. This cross-directional characteristic can also be described as a reversal of direction in a dual sense.

[0031] This change of direction, in both senses, contributes to a homogeneous illumination of the second building wall.

[0032] The luminaire according to the invention offers the possibility of such a change of direction or cross-reflection not only in relation to a single LED cluster, but also in particular in relation to the entirety of the reflector shells.

[0033] Thus, in a luminaire according to the invention, which has only two reflector shells, the right, rear reflector shell of the two reflector shells of an embodiment of a luminaire according to the invention can primarily illuminate the left, front wall areas of the second building wall, and the left, front reflector shell can primarily illuminate the right, rear wall areas of the second building wall. This also achieves an overlap of light distributions according to the invention.

[0034] If an embodiment of a luminaire according to the invention has a reflector arrangement with three reflector shells, three light distributions that at least partially overlap each other can be achieved. This enables a particularly high degree of uniformity and homogeneity in the illumination of the second building wall.

[0035] According to an advantageous embodiment of the invention, the reflector shells each have an upper or outer rim projecting from the first building wall and an inner, lower rim that is located within the first building wall. This embodiment of the invention allows the luminaire to be installed in the first building wall such that the outer, upper rim of each reflector shell projects outwards beyond the first building wall. The projecting area of ​​the reflector assembly thus also enables the illumination of sections of the second building wall that are located very close to the luminaire.

[0036] According to an advantageous embodiment of the invention, an imaginary connecting line between an outer shell edge and an inner shell edge forms a straight line that is inclined to the second building wall. This embodiment of the invention enables a particularly compact luminaire.

[0037] Advantageously, each reflector shell has an outer, upper rim and an inner, lower rim. Furthermore, it is advantageous to establish a connecting line between the inner, lower rim of each reflector shell and the outer, upper rim of the same reflector shell, with these connecting lines of the different reflector shells being arranged parallel to each other.

[0038] The invention also includes situations where each reflector shell is surrounded by a rim edge that provides a contour which is essentially leaf-shaped or teardrop-shaped.

[0039] The contour of a reflector shell can be particularly pointed in its upper area.

[0040] According to an advantageous embodiment of the invention, the LED clusters of a reflector shell are arranged closer to the inner edge of the reflector shell than to the outer edge. This embodiment of the invention enables optimal light distribution and an advantageous design of the respective reflector shells.

[0041] According to an advantageous embodiment of the invention, the outer, upper edge of a reflector shell, in particular the outer, upper edge of each reflector shell, is spaced approximately 1.5 to 10 times further away from the associated LED cluster than the inner, lower edge of the reflector shell. This embodiment of the invention enables particularly efficient light control of the light emitted by an LED cluster as a result of reflection at the reflector shell.

[0042] According to an advantageous embodiment of the invention, the multiple LED clusters are arranged along a straight line that runs parallel to the second building wall. This embodiment of the invention enables a particularly compact design of a luminaire according to the invention.

[0043] According to an advantageous embodiment of the invention, each reflector shell has a front edge and a rear edge relative to the direction of the line, and the second building wall has a front wall region and a rear wall region relative to the direction of the line. The light components projected by an LED cluster onto sections of the associated reflector shell located near the front edge are directed onto regions of the second building wall adjacent to the rear wall region, and the light components projected by an LED cluster onto sections of the associated reflector shell located near the rear edge are directed onto regions of the second building wall adjacent to the front wall region. This embodiment of the invention enables particularly homogeneous illumination of the second building wall.

[0044] According to an advantageous embodiment of the invention, only those light components emitted by the LED clusters that have been reflected by a reflector shell of the reflector arrangement fall onto the second building surface. This embodiment of the invention enables optimized light distribution and the provision of a glare-free luminaire according to the invention.

[0045] According to an advantageous embodiment of the invention, shielding elements are arranged on the luminaire. This embodiment of the invention allows, for example, the arrangement of a first shielding element directly adjacent to an LED cluster, which prevents the emission of unreflected light from the luminaire. Such direct light components can be intercepted by the shielding element. In particular, such a shielding element is positioned such that an LED cluster is arranged between the shielding element and a plane defined by the first building wall.

[0046] A second shielding element can be provided according to the invention to prevent light components that are reflected at the reflector shell and that are not directed directly at the second building wall to be illuminated from escaping from the luminaire.

[0047] This second shielding element also prevents unintentional stray light from escaping the light fixture.

[0048] According to an advantageous embodiment of the invention, each LED cluster is assigned a reflector dish. This embodiment of the invention enables an optimized design of a luminaire according to the invention.

[0049] According to an advantageous embodiment of the invention, each reflector shell receives light from only one LED cluster. This embodiment of the invention enables an optimized design of the luminaire.

[0050] According to an advantageous embodiment of the invention, light components projected by an LED cluster onto sections of the associated reflector shell located near the outer, upper edge of the shell are directed onto areas of the second building wall adjacent to the first building wall. Furthermore, light components projected by an LED cluster onto sections of the associated reflector shell located near the inner, lower edge of the shell are directed onto areas of the second building wall located farther from the first building wall. This embodiment of the invention enables homogeneous illumination of the second building wall.

[0051] According to an advantageous embodiment of the invention, each LED cluster comprises one LED or several LEDs arranged adjacent to one another or directly adjacent to one another. This embodiment of the invention enables a particularly bright and highly efficient luminaire.

[0052] According to an advantageous embodiment of the invention, the luminaire comprises three LED clusters and three reflector shells. This embodiment of the invention enables a particularly optimized design.

[0053] According to an advantageous embodiment of the invention, the luminaire is designed as a recessed floor luminaire and for illuminating a vertical or substantially vertical building wall. This embodiment of the invention enables a particularly optimized recessed luminaire.

[0054] According to an advantageous embodiment of the invention, the luminaire is characterized in that the reflector shells of the reflector arrangement are symmetrically designed with respect to a central longitudinal plane of the reflector arrangement.

[0055] According to a further advantageous embodiment of the invention, at least one LED cluster, or the plurality of LED clusters, is composed of at least two different LEDs that emit different light spectra. These can, for example, be two LEDs that emit differently colored white light, such as white light of different color temperatures.

[0056] The color temperature of the white light can be adjusted by dimming the two LEDs relative to each other. The applicant refers to this type of control as "tunable white light".

[0057] The inventive arrangement of a reflector element with multiple reflector shells, wherein the number of reflector shells corresponds to the number of LED clusters, enables homogenization and color mixing of the light emitted by the two different LEDs. Therefore, the color differences of the different light spectra can no longer be resolved on the building surface to be illuminated. The multiple overlaps of the light distributions generated by the individual reflector shells on the second building wall result in particularly good color mixing on the illuminated building surface.

[0058] According to a further advantageous embodiment of the invention, the two LEDs emit light into a light guide fixed relative to the circuit board. This light guide directs the light, enabling light mixing, to a light-emitting surface from which the mixed light is projected onto the associated reflector shell. Again, this embodiment comprises a plurality of LED clusters and a corresponding plurality of light guides. Each LED cluster is associated with a light guide. The light guide can, for example, be provided by an optical fiber. The light guide transmits the light due to total internal reflection and can effect light mixing. It directs the light from the two LEDs to a light-emitting surface. This embodiment thus has a plurality of light-emitting surfaces of different light guides, corresponding to the number of reflector shells.Light is emitted from the light-emitting surface of the respective light guide into the corresponding reflector shell.

[0059] In this embodiment, an LED cluster can also comprise three or more LEDs.

[0060] In addition to different white LEDs of different color temperatures, different colored LEDs, e.g. red LEDs, green LEDs or blue LEDs, can also be used, whose light components can be premixed particularly well by means of the light guide and fed to the corresponding reflector shell.

[0061] The invention further relates to a system for, in particular, homogeneous wall flooding according to claim 13.

[0062] This system comprises several luminaires according to the invention.

[0063] According to claim 13, several lights are combined into a system.

[0064] Advantageously, the luminaires can each have a first distance to the second building wall and a second distance to a neighboring luminaire. According to the invention, the ratio of the first distance to the second distance can be very small, for example, between 1:5 and 1:8. Thus, according to the invention, homogeneous illumination of the entire second building wall is achieved with only a small number of luminaires and a very small distance between the luminaires and the wall.

[0065] According to an advantageous embodiment of the invention, the system is characterized in that the first distance is less than 100cm, in particular less than 60cm.

[0066] The invention further relates to a lamp according to claim 14.

[0067] Again, the object of the invention is to provide a luminaire that, with a compact design, allows for a small distance between the wall and a large distance between the luminaires, and achieves at least predominantly homogeneous illumination of a building wall.

[0068] The invention solves this problem with the features of claim 14.

[0069] The principle of the invention is best understood by considering the explanations relating to claims 1-13.

[0070] In contrast to the luminaire according to claim 1, the special feature of the luminaire according to claim 14 is that the reflector arrangement has no overhang area.

[0071] The luminaire according to claim 14 allows for flush mounting in the wall. However, the luminaire according to claim 14 cannot illuminate areas of the wall that are very close to the luminaire. This is acceptable in some cases and application situations.

[0072] Nevertheless, the luminaire according to claim 14 also benefits from the special arrangement of several reflector shells and several LED clusters, which enable homogeneous illumination of the building surface across its entire width. Furthermore, the luminaire according to claim 14 takes into account that in some installation situations, a protrusion from the first building wall is unacceptable.

[0073] Furthermore, to avoid repetition regarding this invention and regarding the embodiment according to claim 15, reference is made to the above statements concerning claims 1 to 13, which apply analogously with regard to the understanding of the features and the evaluation of the invention according to claims 1 to 13.

[0074] According to an advantageous embodiment of the invention, the luminaire is characterized in that the reflector shells each have an outer shell edge that is arranged adjacent to the top of the first building wall, and an inner shell edge that projects into the first building wall.

[0075] According to an advantageous embodiment of the invention, the light fixture is characterized in that a connecting line between an outer shell edge and an inner shell edge forms a straight line which is arranged inclined to the second building wall.

[0076] According to an advantageous embodiment of the invention, the luminaire is characterized in that the LED clusters are arranged closer to the inner edge of the shell than to the outer edge of the shell.

[0077] According to an advantageous embodiment of the invention, the luminaire is characterized in that the outer edge of a reflector shell, in particular the outer edge of each reflector shell, is spaced approximately 1.5 to 10 times further away from the associated LED cluster than the inner edge of the shell.

[0078] According to an advantageous embodiment of the invention, the luminaire is characterized in that the several LED clusters are arranged along a straight line that runs parallel to the second building wall.

[0079] According to an advantageous embodiment of the invention, the luminaire is characterized in that each reflector shell has a front shell edge and a rear shell edge with respect to the direction of the straight line, and that the second building wall has a front wall area and a rear wall area with respect to the direction of the straight line, wherein the light components that are thrown by an LED cluster onto sections of the associated reflector shell that are arranged close to the front shell edge are directed onto areas of the second building wall that are adjacent to the rear wall area, and that the light components that are thrown by an LED cluster onto sections of the associated reflector shell that are arranged close to the rear shell edge are directed onto areas of the second building wall that are adjacent to the front wall area.

[0080] According to an advantageous embodiment of the invention, the luminaire is characterized in that only those light components emitted by the LED clusters that have undergone reflection at a reflector shell of the reflector arrangement fall onto the second building surface.

[0081] According to an advantageous embodiment of the invention, the luminaire is characterized in that the luminaire has shielding elements that prevent the emission of unreflected light components.

[0082] According to an advantageous embodiment of the invention, the luminaire is characterized in that each LED cluster is assigned a reflector shell.

[0083] According to an advantageous embodiment of the invention, the luminaire is characterized in that each reflector shell receives light from only one LED cluster.

[0084] According to an advantageous embodiment of the invention, the luminaire is characterized in that the light components thrown by an LED cluster onto sections of the associated reflector shell that are arranged close to the outer edge of the shell are directed towards areas of the second building wall that are adjacent to the first building wall, and that the light components thrown by an LED cluster onto sections of the associated reflector shell that are arranged close to the inner edge of the shell are directed towards areas of the second building wall that are arranged far from the first building wall.

[0085] According to an advantageous embodiment of the invention, the luminaire is characterized in that each LED cluster comprises one LED or several LEDs arranged adjacent to one another or immediately adjacent to one another.

[0086] According to an advantageous embodiment of the invention, the luminaire is characterized in that the luminaire comprises three LED clusters and three reflector shells.

[0087] According to an advantageous embodiment of the invention, the luminaire is characterized in that the luminaire is designed as a recessed floor luminaire and for illuminating a vertical or substantially vertical building wall.

[0088] According to an advantageous embodiment of the invention, the luminaire is characterized in that the reflector shells of the reflector arrangement are symmetrically designed with respect to a central longitudinal plane of the reflector arrangement.

[0089] The invention also relates to a system according to claim 15.

[0090] According to an advantageous embodiment of the invention, the system is characterized in that the luminaires each have a first distance to the second building wall and a second distance to an adjacent luminaire, wherein the ratio of the first distance to the second distance is between 1:5 and 1:8.

[0091] According to an advantageous embodiment of the invention, the system is characterized in that the first distance is less than 100cm, in particular less than 60cm.

[0092] Further advantages of the invention will become apparent from the uncited dependent claims, as well as from the following description of the embodiments shown in the drawings.

[0093] It shows: Fig. 1 shows a partially cutaway, schematic view of an embodiment of a luminaire according to the invention, designed as a recessed floor luminaire and embedded in a first building wall, as well as a second, vertically oriented building wall to be illuminated, with an exemplary indication of the light beam path. Fig. 2 shows a partially cutaway, schematic view of the luminaire. Fig. 1 in sole representation in top view, approximately according to view arrow II in Fig. 1 , showing a dome-shaped cover element having a translucent cutout, Fig. 3 in a partially cutaway, schematic view, approximately according to view arrow III in Fig. 1 , the second building wall to be illuminated and, in separate schematic representation, the reflector bowls of the luminaire, wherein the luminaire comprises three reflector bowls, wherein Fig. 3In a schematic diagram, the three different light field contours of the light distributions generated by the three reflector shells on the second building wall are illustrated by way of example, Fig. 4, approximately according to view arrow IV in Fig. 1 , an embodiment of a system according to the invention, comprising three luminaires according to the invention, for the homogeneous illumination of a second building surface, illustrating a first distance of a luminaire to the wall and illustrating a second distance of the luminaire to an adjacent luminaire, Fig. 5 an alternative embodiment of a luminaire according to the invention in a representation according to Fig. 1 , which is designed as a recessed wall light for illuminating a floor area, Fig. 6 shows a further embodiment of a light according to the invention in a representation according to Fig. 1, which is designed as a recessed ceiling light and serves to illuminate a vertical wall, Fig. 7 in a partially cutaway, schematic, enlarged view of the internal structure of the light according to Fig. 1 , for example according to sub-circle VII in Fig. 1 , showing additional details, Fig. 8 the reflector arrangement of the exemplary embodiment of the lamp of the Fig. 1 with three reflector shells and with three LED clusters schematically in standalone view, approximately according to view arrow VIII in Fig. 7 , where the circuit board and the shielding elements have been omitted for clarity, Fig. 9 shows a further schematically modified view of the exemplary embodiment of the reflector arrangement of the Fig. 8 with three reflector shells, similar to the representation of the Fig. 8 , in a grayscale image, to illustrate numerous light rays, Fig. 10 another embodiment of a lamp approximately according to view arrow II in Fig. 1, in a representation according to Fig. 9 , wherein the window-like cutout of the exemplary embodiment of the Fig. 10 from the exemplary embodiment of the Fig. 2 Fig. 11 shows a further embodiment of a lamp, in a representation according to. Fig. 7 , with the circuit board opposite the position of the Figure 7 is arranged offset, so that the distance between the circuit board and the reflector arrangement is increased, wherein the embodiment has a modified LED cluster, and wherein a light guide mixes the light emitted by the two LED clusters and directs it to a light-emitting surface, Fig. 12 shows an embodiment of a further luminaire according to the invention, which allows flush installation in the first building wall, and in which the reflector arrangement has no protrusion area, in a representation analogous to the representation of the Figure 1 , Fig. 13 the embodiment of the Fig. 12 according to view arrow XIII in Fig. 12in standalone representation and enlarged in a partially cutaway, schematic view, and Fig. 14 the reflector arrangement of the exemplary embodiment of the Figure 12 and 13 in a representation according to Fig. 8 .

[0094] Exemplary embodiments of the invention are described in the following description of the figures, also with reference to the drawings. For the sake of clarity, identical or comparable parts, elements, or areas are designated with the same reference numerals, sometimes with the addition of lowercase letters or apostrophes, even where different embodiments are involved.

[0095] Features described only in relation to one embodiment can also be provided in any other embodiment of the invention. Such modified embodiments are included in the invention, even if they are not shown in the drawings.

[0096] All disclosed features are essential to the invention. The disclosure of this application hereby incorporates in full the disclosure content of the associated priority documents (copy of the prior application) as well as the cited publications and the described devices of the prior art, also for the purpose of including one or more features of these documents in one or more claims of the present application.

[0097] The embodiments shown in the drawings designate the luminaire in its entirety by the reference numeral 10. A first embodiment of a luminaire 10 is shown in Fig. 1 schematically represented. In this embodiment, the luminaire 10 is designed as a recessed luminaire and is embedded in a floor wall 11. In this embodiment, the floor wall is, in the terminology of the present patent application, the first building wall 11.

[0098] The luminaire 10 serves to illuminate a second building wall 12, which in the embodiment according to the Fig. 1 is designed as a vertical building wall 12.

[0099] A first special feature of the luminaire 10 according to the invention is that, unlike conventional luminaires, it protrudes slightly from the first building wall 11. This allows a lower area 31a of the second building wall 12 to also be illuminated. Further advantages of the luminaire 10 will be described later with reference to the Fig. 4 will be explained.

[0100] The luminaire 10 according to the invention comprises a housing 13, which is also referred to as a recessed housing, and which is inserted into the first building wall 11. It can, for example, be potted there or inserted into a cavity in the first building wall 11.

[0101] The housing 13 includes a circuit board 14 on which several LED clusters 15a, 15b, 15c are arranged. In the exemplary embodiments of the Figs. 1 to 11Three LED clusters 15a, 15b, 15c are provided, each containing several LEDs, e.g., two high-power LEDs (not shown in the figures). For the sake of simplicity, each LED cluster 15a, 15b, 15c is considered a single point light source for optical analysis.

[0102] The luminaire 10 according to the invention comprises a reflector arrangement 16, shown in isolation in Fig. 8 indicated and in Fig. 9 The reflector arrangement 16 is shown in the figure. It is formed in a single piece and comprises three reflector shells 17a, 17b, 17c. The reflector arrangement 16 can, for example, be provided by an injection-molded plastic part. This part can be provided with a highly reflective coating.

[0103] Light 10 is, like the Figures 1 and 2to make clear, a dome-shaped cover 20 extends outwards from the first building wall 11 and is opaque. The cover 20 includes a translucent opening 21. This opening is designed like a window and allows the light emitted by the reflector arrangement 16 to pass through.

[0104] Based on the exemplary embodiment of the Fig. 8 It should first be clarified that the central reflector shell 17b is completely symmetrical along a plane of symmetry 37. The reflector arrangement 16 is advantageously symmetrical overall with respect to this central plane 37 in all embodiments of the invention.

[0105] All three reflector shells 17a, 17b, 17c are individually shaped. Reflector shells 17a and 17c are identical in design, but arranged in a mirror-image fashion with respect to the plane of symmetry 37.

[0106] The three reflector shells 17a, 17b, 17c each have an edge contour 42a, 42b, 42c, which is essentially leaf-shaped or teardrop-shaped. With regard to Figure 8 Each of the contours 42a, 42b, 42c is tapered to a point and includes a vertex area 43a, 43b, 43c. Each of the three reflector shells 17a, 17b, 17c is bulbous and includes a wider abdominal area 44a, 44b, 44c.

[0107] The two outer reflector shells 17a and 17c are, as Fig. 8The reflector shells 17a, 17b, 17c are arranged inclined with respect to the plane of symmetry 37 and their upper shell edges 22a, 22c, which are referred to in this patent application as outer shell edges 22a and 22c, are positioned close to the plane of symmetry 37. The inner, lower shell edge 23a, 23c, which is located near the belly area 44a, 44b, 44c of each reflector shell 17a, 17b, 17c, is spaced apart from the plane of symmetry 37.

[0108] Fig. 8 The figure illustrates the position of the LED clusters 15a, 15b, 15c in relation to the individual reflector shells 17a, 17b, 17c. The LED clusters 15a, 15b, 15c are arranged far below the center of the respective reflector shell 17a, 17b, 17c, approximately in the region of the lower fifth of the height of the respective reflector shell 17a, 17b, 17c.

[0109] According to the exemplary embodiment of the Fig. 7The outer, upper edge 22 of the reflector shell 17 can be connected to the inner, lower edge 23 of the reflector shell 17 by an imaginary straight line 25.

[0110] The respective LED cluster 15 is, as can be seen from Figure 7 results in being arranged closer to the inner shell edge 23 than to the outer shell edge 22.

[0111] This requirement applies to each of the multiple reflector shells 17a, 17b, 17c. This is also shown, for example, by... Figure 8 .

[0112] Figure 8 further shows that the three LED clusters 15a, 15b, 15c are arranged along a straight line 24.

[0113] Each LED cluster 15a, 15b, 15c emits light exclusively or predominantly into its associated reflector dish 17a, 17b, 17c. Conversely, each of the reflector dishes 17a, 17b, 17c receives light predominantly or exclusively from only one of the LED clusters 15a, 15b, 15c.

[0114] Figure 7makes it clear that the LED cluster 15 arranged on a circuit board 14 emits light into the reflector bowl 17.

[0115] The light rays indicated as examples are designated with the reference symbols 18a, 18b, 18c, 18d, etc.

[0116] A special feature of the present case is that the light rays emitted by an LED cluster 15, which are reflected at a section 30a of the reflector shell 17a, which is arranged near the outer edge of the shell 22 and which are here designated by reference numeral 18a, are directed onto those sections 31a ( Fig. 1 ) of the second building wall 12 to be illuminated, which are arranged immediately adjacent to the light fixture 10.

[0117] The light components reflected at the overhang area 19, i.e. near the outer shell edge 22, at the reflector shell 17, thus illuminate areas 31a of the second building wall 12, which are located near the light 10 or which are also located near the first building wall 11.

[0118] With those light components, see e.g. the light beam 18g, which are emitted by the LED cluster 15 and which strike sections 30g of the reflector shell 17, which are arranged near the inner shell edge 23, areas 31g ( Fig. 1 ) the second building wall 12 illuminated, which are located far from the light 10 and thus far from the first building surface 10.

[0119] Figure 7The following illustrates this: The further an area 30a, 30g of the reflector bowl onto which a light beam 18a, 18g hits is distanced from the inner, lower edge 23 of the reflector bowl, the closer the wall section to be illuminated by this light beam 18a, 18g is to the wall to be illuminated at the light 10.

[0120] The luminaire 10 according to the invention comprises a reflector arrangement 16 which includes a projection area 19. The reflector arrangement 16 projects beyond the outer surface 38 of the first building wall by the height 45 of the projection area 19 (cf. Fig. 7 ).

[0121] Only because of this overhang area 19 can it be possible, as Fig. 1 This clarifies that deep-lying areas 31a of the building wall 12 to be illuminated will also be illuminated.

[0122] This means that the entire second building wall 12, from top to bottom, can be illuminated evenly with the luminaire 10 according to the invention.

[0123] Figure 3 clarifies that the second building wall to be illuminated is 12 in a front, with respect to Fig. 3 left wall area 28, into a rear one, regarding. Fig. 3 The right wall area 29 can be subdivided into a middle wall area 46. The terms front wall area 28 and rear wall area 29 refer to the direction of the straight line 24 that connects the LED clusters 15a, 15b, 15c.

[0124] The terms front and rear reflector shell, front and rear wall sections, front and rear shell edges, etc., refer to the viewing direction of an observer of the exemplary embodiment of the Fig. 1 The front elements are related to the viewing direction of the Fig. 1 such elements that are closer to the viewer than the corresponding elements behind them.

[0125] The light distributions generated by the individual reflector shells 17a, 17b, 17c exhibit different light field contours 36a, 36b, 36c. These are shown on the building wall 12 to be illuminated. Fig. 3 indicated, whereby the light distributions belonging to the different light field contours 36a, 36b, 36c naturally overlap and add up in total.

[0126] It should be noted that in Fig. 3 The three light field contours 36a, 36b, 36c have slightly different heights. However, this representation was chosen only for a simplified illustration. In reality, the several light distributions on the building wall 12 to be illuminated should have the same height.

[0127] It is important that the middle reflector shell 17b, in relation to Figure 3 , illuminates a central area 46 of the building surface 12, thereby generating approximately a light field contour 36b, which in Fig. 3 is designated with reference 36b.

[0128] The one relating to Figure 3 far left, front area of ​​wall 12, approximately the left sixth 39 of wall 12 and that in relation to Figure 3 The far right, rear sixth 40 of wall 12, is not covered by the light distribution of the middle reflector shell element 17b, for example.

[0129] This refers to Figure 3 left, front in Fig. 3 In contrast, the reflector shell element 17c, shown in rear view, generates a light distribution with a light field contour 36a that extends approximately along the right rear area of ​​the wall 12, encompassing two-thirds of the wall's width. The light field contour 36a thus extends in particular over the central area 46 and the right rear area 29 of the building wall 12.

[0130] The left third, i.e. the front wall section 28 of the building wall 12, is not covered by the light distribution generated by the left reflector shell element 17c.

[0131] The right, rear reflector shell element 17a generates a light field contour 36c, such that the right or rear third of the building wall 12 is not illuminated by the reflector shell element 17a. The right reflector shell element 17a thus illuminates the front, left wall section 28 and the middle wall section 46 of the building wall 12, but not the right or rear wall section 29.

[0132] The luminaire according to the invention thus provides a first reversal of the direction of the light components. With regard to the in Figure 3 The reflector shell 17c, located to the left of the plane of symmetry 37, i.e., the front reflector shell 17c, primarily serves to illuminate the rear wall terminations 29 of the building wall. The [reference to] Figure 3The reflector shell elements 17a arranged to the right of the plane of symmetry 37, i.e. the rear reflector shell element 17a, primarily serves to illuminate front wall sections 28 of the building wall 12. This results in a first change of direction.

[0133] In addition, a second change in the direction of the light components also takes place, which is based on the Figure 8 This will be explained. Figure 8 This shows, it should be noted at this point, in contrast to the Figure 3 the reflector arrangement 16 with its three shell elements 17a, 17b, 17c in front view, i.e., in relation to the Figure 3 mirror image. Figure 8 Illustrates - as an example of a multitude of other light rays - on the left, rear reflector shell element 17a, a light ray 18x 1, which originates from the LED cluster 15a, and which is reflected as a light ray 18x 2, which crosses the plane of symmetry 37.

[0134] Similarly illustrated Figure 8For the front reflector shell element 17c, an exemplary light ray 18y 1, which after reflection at the reflector shell 17c becomes a light ray 18y 2, which also crosses the plane of symmetry 37.

[0135] Other light rays, such as light ray 18z 1, become light rays 18z 2 after reflection, which do not cross the plane of symmetry 37.

[0136] The indicated path of the light rays of the Figure 8This illustrates that all light rays, or at least the vast majority of light rays, emanating from an LED cluster 15a, 15b, 15c, which, before their reflection at the inner surface of the associated reflector shell 17a, 17b, 17c, exhibit a directional component towards the plane of symmetry 37, exhibit a path directed away from the plane of symmetry 37 after reflection. Those light rays which, before reflection at the inner surface of the associated reflector shell 17a, 17b, 17c, exhibit a directional component leading away from the plane of symmetry 37, are directed towards and intersect the plane of symmetry 37 after their reflection.

[0137] Figure 8 This illustrates the change in direction of the light rays in relation to the plane of symmetry 37.

[0138] In other words, Figure 8It is clear that light components emanating from an LED cluster, e.g., LED cluster 15a, are directed towards a rear edge 26a of the reflector shell 17a, or at least have a directional component in that direction, predominantly serve to illuminate front wall sections 28 of the wall 12, as shown, for example, by arrows 18x1, 18x2, but also analogously by arrows 18z1, 18z2 and 18w1, 18w2. Figure 8 This is made clear.

[0139] Such light components, which are emitted from an LED cluster 15a (or another LED cluster) but towards a front shell edge 27a of the reflector shell 17a (see e.g. arrow 18x 3), will, after reflection, illuminate rear wall areas 29 of the building wall as arrow 18x 4.

[0140] The consideration of this light ray path of the light rays 18x 1 , 18x 2 , 18x 3 , 18x 4 of the reflector shell 17a naturally applies, taking into account the corresponding front shell edges 27b, 27c and the rear shell edges 26b, 26c for the reflector shells 17b, 17c with reference to Figure 8 Likewise. This means that a clearing exchange is planned in a second sense.

[0141] Similarly, a third, albeit somewhat more complex, change in the direction of the light components also takes place in the vertical direction, as in Figure 7 illustrated. Here, the following applies: The further down from the LED cluster 15 according to Figure 7 Light rays emitted towards areas 30g that are close to the inner edge of the shell 23, the higher the reflected light rays hit (e.g. light ray 18h in Fig. 7 ), on corresponding areas of the second building wall to be illuminated 12.

[0142] Thus, in the luminaire 10 according to the invention, a change in direction of light rays takes place in several respects.

[0143] When using the lamps 10a, 10b, 10c according to the invention, the following can be demonstrated: Figure 4 With only very small distances 34a, 34b, 34c to a building wall 12 to be illuminated, very large distances 35a, 35b, 35c between each pair of luminaires, e.g. between luminaires 10a, 10b, can be achieved. This allows homogeneous illumination of tall and wide building surfaces 12 to be achieved with only a small number of luminaires 10a, 10b, 10c and a small distance 34 from the wall.

[0144] Figure 5 illustrates an alternative installation situation in which the luminaire 10 according to the invention is arranged on a building wall 11, e.g. in the lower area, e.g. at a height of only 50 cm above the floor surface 12, and serves to illuminate the floor surface 12.

[0145] Figure 6Figure 1 illustrates a further embodiment of a luminaire 10 according to the invention, which is designed as a recessed ceiling luminaire 10 and is installed in the ceiling of a building room. Here, the side wall 12 is illuminated from the ceiling.

[0146] The patent application uses the terms inner or lower shell edge and outer and upper shell edge. This use of the terms upper and lower refers to the consideration of the exemplary embodiment of the Fig. 1 and assumes that the luminaire 10 according to the invention is designed as a recessed floor luminaire, as in Fig. 1 As shown. When using the luminaire 10 according to the invention as a recessed ceiling luminaire, the terms top and bottom must be understood as geometrically inverted.

[0147] The figures show the lamp 10 only as a schematic diagram of its construction. In the exemplary embodiments, the circuit board 14, although not shown, is fixedly arranged relative to the housing 13, for example, screwed to it. The reflector assembly 16, which is also not shown in the figures, is fixedly arranged relative to the housing 13, either directly or indirectly attached to the housing 13 of the lamp.

[0148] The spacer elements 32, 33 are also fixed, either directly or relative to the housing 13 of the luminaire. They can, for example, be mechanically connected to the circuit board 14 and / or to the reflector assembly 16.

[0149] Another embodiment of a lamp 10 according to the invention shows Figure 11 , in a representation comparable to the Figure 7 .

[0150] The light 10 of the Figure 11It comprises several LED clusters 15d, each consisting of two different LEDs 47a and 47b. The two LEDs 47a and 47b can be, for example, two white light-emitting LEDs of different color temperatures, or LEDs of different colors, such as a red or a green LED.

[0151] More than two LEDs can be combined to form an LED cluster 15d. The LED clusters 15d are in turn arranged on a circuit board 14.

[0152] Also arranged on the circuit board 14 is a light guide 48, e.g., a transparent plastic cylinder, similar to an optical fiber. The two LEDs 47a, 47b shine their light into this. Due to total internal reflection, light is guided within the light guide 48 from the light entry surfaces to a light exit surface 49. Furthermore, the light guide 48 also ensures color mixing of the light. The light exiting surface 49 is therefore well mixed in terms of color. The light exit surface 49 emits the light analogously to the illustration of the exemplary embodiment. Figure 7 and shines the mixed light into the reflector bowl 17.

[0153] Again, the exemplary embodiment includes the Figure 11 several LED clusters 15d arranged on the circuit board 14, wherein Figure 11only one of these clusters is shown, and a number of reflector shells17a, 17b,17c that corresponds to the number of LED clusters15d.

[0154] The light fixture of the exemplary embodiment of the Figure 11This enables particularly good color mixing of the light from the different LEDs 47a, 47b with different spectra on the second building wall 12 to be illuminated. The desired adjustable color temperature can be achieved even with different white-light LEDs that produce white light of different color temperatures. Good color mixing can also be achieved with LEDs of different colors, such as RG and B-LEDs (red-green-blue). This is achieved through the light guide 48, the number of LED clusters 15a, 15b, 15c corresponding to the number of reflector shells 17a, 17b, 17c, and finally, the previously described cross-reflection in several respects. This results in an overlap of several light distributions on the building wall 12, so that the different color points of the light distribution are no longer resolvable for the observer.

[0155] Another embodiment of a luminaire 50 according to the invention will now be described using the following examples: Figures 12 to 14 This will be explained. This light fixture, in its entirety, is compatible with the Figures 12 to 14 Designated with reference numeral 50. The remaining parts and elements are designated using the same reference numerals as in the exemplary embodiments of the Figures 1 to 11 depicted.

[0156] The lamp 50 of the Fig. 12 The luminaire 50 is designed for flush, in particular surface, installation in the first building wall 11. It comprises a luminaire housing 13 and a circuit board 14 on which several LED clusters 15a, 15b, 15c are arranged, and a reflector arrangement 16 with a number of reflector shells 17a, 17b, 17c corresponding to the number of LED clusters 15a, 15b, 15c.

[0157] In contrast to the embodiment of the Figures 1 to 11The reflector arrangement 16 does not protrude from the building wall 11. The luminaire 50 is arranged with its upper surface 53, 54 flush with the upper surface 38 of the first building wall 11.

[0158] The reflector arrangement 16 of the exemplary embodiment of the Figures 12 to 14 This corresponds in principle almost identically to the reflector arrangement 16 of the exemplary embodiment of the Figs. 1 to 11 , with the difference that the vertex areas 43a, 43b, 43c of the reflector shells 17a, 17b, 17c are, so to speak, cut off or truncated.

[0159] Figure 14 clarifies that the embodiments of the Figures 1 to 11 The section of the reflector arrangement 16 designated as overhang area 19 is missing. In the previously described embodiments, this overhang area protruded from the first building wall 11.

[0160] Because this overhang area 19 in the embodiment of the Figs. 12 to 14Without this, a flush arrangement of the luminaire 50 becomes possible in the first place.

[0161] In the simplest case, reflector arrangements 16, as in the embodiment of the Figures 1 to 11 can be used with modified vertex areas 22a, 22b, 22c according to Figure 14 .

[0162] Figure 14 shows that these vertex regions 22a, 22b, 22c are flattened.

[0163] Figure 12 This illustrates that the reflector assembly 16 of the luminaire 50 is located entirely within the building wall 11. The top of the luminaire 50 comprises, according to the Figures 12 to 14 a cover section 51 with a top surface 53, which may be designed to be opaque.

[0164] Furthermore, the luminaire 50 includes a cover section 52 in which a cutout or window is arranged. The section 52 can, in particular, be designed as a transparent disc and allow light to pass through.

[0165] The opaque section 51 protrudes according to Figure 12 from the right edge of the housing 13 to the left towards the building wall 12, until close to the light rays that illuminate the lowest area on the second building wall 12.

[0166] Figure 12 its light ray path illustrates that according to Fig. 1 lowermost section 31a of the building area to be illuminated 12 from the light fixture 50 Figs. 12 to 14 with regard to the omitted overhang area 19, it cannot be illuminated.

[0167] On the other hand, the luminaire 50, according to the embodiments of the Figures 12 to 14 homogeneous illumination of the building wall 12 along a very wide area. This takes into account that in certain installation situations, the lower sections 31a of the second building wall 12, closest to the luminaire 50, do not necessarily need to be illuminated.

[0168] Advantageously, the reflector arrangement 16 of the exemplary embodiment comprises Figures 12 to 14 a cross-shaped characteristic of the light rays, as seen in Figure 14 This previously described reversal of the direction of the light rays enables, in several respects, as in the previously described embodiment, an overlap of different light distributions on the building wall to be illuminated, and thus a homogenization and a particularly wide-beam light distribution.

[0169] In this embodiment as well, the luminaire 50 comprises several LED clusters 15a, 15b, 15c, which are arranged along a straight line 24 that runs parallel to the building wall 12 to be illuminated.

[0170] Furthermore, the exemplary embodiment of the following applies to the understanding and description. Figures 12 to 14 Similarly, the description of the exemplary implementations of the Figures 1 to 11 .

[0171] Finally, it is pointed out that with luminaires 50, according to the exemplary embodiments of the Figures 12-14 Likewise, a homogeneous color mix can also be achieved if the LED clusters 15a, 15b, 15c include LEDs 47a, 47b that emit different light spectra, i.e., for example, different white light of different color temperature, or different colored light, e.g., red, green, or blue light.

Claims

1. Luminaire (10) for installation in a first building wall (11) and for illuminating a second building wall (12) arranged adjacent to the first building wall, comprising a housing (13), a circuit board (14) on which several LED clusters (15a, 15b, 15c) are arranged, and a reflector arrangement (16) with a number of reflector shells (17a, 17b, 17c) corresponding to the number of LED clusters (15a, 15b, 15c), wherein the housing (13) with the reflector arrangement (16) is recessed into the first building wall (11), and wherein the reflector arrangement (16) projects outwards from the first building wall (11) with a projection area (19), wherein the luminaire (10) is covered by a cover (20), in particular dome-shaped, which is translucent when the luminaire is installed in the second building wall. The building wall-facing cutout (21) has light emitted by the LED clusters (15a, 15b, 15c) and reflected by the reflector shells (17a, 17b,17c) allows reflected light components, including light components (18a, 18b) reflected at the overhang area (19), to pass to the second building wall (12).

2. Luminaire (10) according to claim 1, characterized by the fact that the reflector shells (17a, 17b, 17c) each have an outer shell edge (22) that protrudes from the first building wall (11) and an inner shell edge (23) that protrudes into the first building wall (11).

3. Luminaire (10) according to claim 2, characterized by the fact that a connecting line (24) between an outer shell edge (22) and an inner shell edge (23) forms a straight line (25) which is inclined to the second building wall (12).

4. Luminaire (10) according to claim 2 or 3, characterized by the fact that the LED clusters (15a, 15b, 15c) are arranged closer to the inner shell edge (23) than to the outer shell edge (22).

5. Luminaire (10) according to one of claims 2 to 4, characterized by the fact thatthe outer shell edge (22) of a reflector shell (17a, 17b, 17c), in particular that the outer shell edge (22) of each reflector shell (17a, 17b, 17c) is spaced approximately 1.5 times to 10 times further away from the associated LED cluster (15a, 15b, 15c) than the inner shell edge (22).

6. Luminaire (10) according to any of the preceding claims, characterized by the fact that the several LED clusters (15a, 15b, 15c) are arranged along a straight line (24) that runs parallel to the second building wall (12).

7. Luminaire (10) according to claim 6, characterized by the fact thatEach reflector shell (17a, 17b, 17c), with respect to the direction of the line (24), has a front shell edge (27a, 27b, 27c) and a rear shell edge (26a, 26b, 26c), and the second building wall (12), with respect to the direction of the line (24), has a front wall area (28) and a rear wall area (29), wherein the light components (18y1, 18x3) thrown by an LED cluster (15a, 15b, 15c) onto sections of the associated reflector shell located near the front shell edge (27a, 27b, 27c) are directed onto areas of the second building wall (12) adjacent to the rear wall area (29), and wherein the light components (18z1, 18x1), which are thrown by an LED cluster (15a, 15b, 15c) onto sections of the associated reflector shell located close to the rear edge of the shell (26a, 26b, 26c) and directed towards areas of the second building wall (12) adjacent to the front wall area (28).

8. Luminaire (10) according to any of the preceding claims, characterized by the fact that Only those light components emitted by the LED clusters (15a, 15b, 15c) that have been reflected by a reflector shell (17a, 17b, 17c) of the reflector arrangement (16) fall on the second building surface (12).

9. Luminaire (10) according to any of the preceding claims, characterized by the fact that the luminaire (10) has shielding elements (32, 33) which prevent the emission of unreflected light components.

10. Luminaire (10) according to any of the preceding claims, characterized by the fact that Each LED cluster (15a, 15b, 15c) is assigned a reflector shell (17a, 17b, 17c).

11. Luminaire (10) according to any of the preceding claims, characterized by the fact that Each reflector dish (17a, 17b, 17c) receives light from only one LED cluster (15a, 15b, 15c).

12. Luminaire (10) according to one of claims 2 to 11, characterized by the fact thatthe light components (18a, 18b) that are thrown by an LED cluster (15a, 15b, 15c) onto sections (30a) of the associated reflector shell (17a, 17b, 17c) that are located near the outer edge of the shell (22) are directed onto areas (31a) of the second building wall (12) that are adjacent to the first building wall (11), and that the light components (18h, 18i) that are thrown by an LED cluster (15a, 15b, 15c) onto sections (30g) of the associated reflector shell (17a, 17b, 17c) that are located near the inner edge of the shell (23) are directed onto areas (31g) of the second building wall (12) that are located far from the first building wall (11).

13. System for homogeneous wallwashing, comprising several luminaires (10a, 10b, 10c) according to one of the preceding claims, wherein the several luminaires (10a, 10b, 10c) are arranged along a straight line (24), and wherein the several luminaires (10a, 10b, 10c) are designed for the common illumination of the second building wall (12).

14. Luminaire (50) for installation, in particular flush with the surface, in a first building wall (11) and for illuminating a second building wall (12) arranged adjacent to the first building wall (11), comprising a housing (13), a circuit board (14) on which several LED clusters (15a, 15b, 15c) are arranged, and a reflector arrangement (16) with a number of reflector shells (17a, 17b, 17c) corresponding to the number of LED clusters (15a, 15b, 15c), wherein the housing (13) with the reflector arrangement (16) is recessed into the first building wall (11), wherein the luminaire (50) is covered by a cover (51) which has at least one translucent cutout (52) that allows light emitted by the LED clusters (15a, 15b, 15c) to pass through the Reflector shells (17a, 17b, 17c) allow reflected light components to pass to the second building wall (12).

15. System comprising multiple luminaires according to claim 14, wherein the multiple luminaires (50) are arranged along a straight line (24), and wherein the multiple luminaires (50) are designed to jointly illuminate the second building wall (12).

Images