JP2008053049A - Lighting equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide compact and lighting equipment with easy assembling operation by using LEDs. <P>SOLUTION: The lighting equipment is provided with a bucket-shaped reflector (16) that has at least two side-walls and has reflection effects in its inside. The first side-wall (18) faces the second side-wall (19). A diffusing element (24) is arranged inside a light exit opening (23) provided in the reflector. The first side-wall (18) and the second side-wall (19) facing the first side-wall respectively have each section (18, 19) arranged along one planar face. A plurality of the LEDs (27a-27g) each having a different color are respectively arranged in each section. Most of the light emitted from the LED (27a) arranged on one side-wall (18) reach the diffusing element (24) first after being reflected with the other side-wall (19). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lighting fixture according to the first stage of claim 1.

  Of particular interest are building luminaires, for example luminaires that can be mounted on the ceiling of a room. However, the luminaire referred to here may be an outdoor lamp. Preferably, the luminaire serves to illuminate the building plane. Therefore, what is basically desired is to achieve a uniform light distribution and, in the case of various color illumination means, to achieve as uniform a color mixture as possible.

  Applicant's luminaire, which has become known from a known prior use, comprises a substantially bowl-shaped reflector with a reflective surface on the inside. Applicant's lighting fixture, known under the name “focal flood”, comprises three fluorescent lamps of different colors that can be lit in the interior of the reflector to obtain various mixed colors. The one-piece shaped bowl-shaped reflector has two longitudinal side walls and one bottom wall, which are arranged so as to form a substantially parabolic cross section as a whole. The mountain area of the reflector forms the bottom wall of the reflector. Two narrow side walls are provided on the front side of the reflector. A diffusing element is arranged in the light exit aperture and mixes the light parts of the basic colors of the three illumination means.

  Starting from a conventionally known luminaire, the object of the present invention is to use an LED as a lighting means and to make the structure of the individual lighting means almost impossible to be disassembled and to enable a simple assembly with a compact construction. To provide an instrument.

  This problem is solved by the features of claim 1, particularly the features of the latter part of claim 1. According to this, the luminaire according to the present invention has at least a first side wall and a second side wall facing it, each having at least one section aligned along a plane, of different colors. A plurality of LEDs are arranged, and more specifically, arranged so that most of the light emitted from the LEDs arranged on one side wall reaches the diffusing element only after being reflected on the other side wall. It is characterized by.

  The principle of the present invention is to first provide the reflector with a side wall section made flat or flat, i.e. aligned along one plane. Such a side wall section, on the other hand, allows a particularly simple fixing of the LED, which can be mounted, for example, on a printed circuit board, to a reflector. Since the printed circuit board can be fixed in a particularly simple manner in a plane adjacent to the flat section, simple and reliable assembly is possible using the simplest fixing means. The ability of the printed circuit board to be planarly adjacent to the flat section also allows the printed circuit board to be stably placed on the reflective element. By providing a flat section, a large area positioning surface can be prepared for the printed circuit board.

  The LED can enter, for example, through the opening of the section and into the interior of the reflector, but the printed circuit board is planarly adjacent to the outside of the reflector section. By disposing the printed circuit board outside the inner space of the reflector, there is no possibility that the printed circuit board prevents the light from spreading inside the reflector and moving forward.

  In addition to mounting a flat printed circuit board with LEDs and simple fixing of the printed circuit board, it is also possible to simply mount a heat sink outside the printed circuit board by forming a section of the reflector side wall in a plane Therefore, there is no possibility that the heat radiating element prevents the light from mixing inside the reflector and moving forward. Here, the heat dissipating element or the heat dissipating element can also be made in an advantageous manner in a flat or large volume form and can be fixed to the reflector housing directly or via a printed circuit board in a reliable and stable manner.

  In a further main aspect of the present invention, LEDs are respectively disposed on at least the first side wall and the second side wall facing the reflector. Already in principle, the LEDs are thus distributed in the entire inner space of the reflector, i.e. spaced from one another, in the reflector. It is further noted here that only after the majority of the light emitted from one LED is reflected by the other side wall, especially after the LED is reflected by the side wall facing the fixed side wall, reaches the diffusing element. I expect. This ensures in any case that only a small part of the light emitted from the LED reaches the diffusing element directly. If possible, it is preferred that when most of the light emitted from one LED is reflected by the facing side walls, this part of the light hits the flat inner surface, so that there is a particularly well set reflection there. .

  Overall, the inventive creation of reflective elements and the placement of LEDs allows for particularly good color mixing of different colors of light. The basic color mixing has already been done before the entire light emitted from all LEDs hits the diffusing element. This color mixing is further improved by the diffusing element.

  Even if an observer outside the luminaire looks directly into the diffusing element, the individual light sources can no longer be distinguished by their placement and by their color. Similarly, the building plane illuminated by the luminaire is illuminated uniformly in terms of its strength and in terms of its mixed color.

  In addition, the luminaire according to the present invention can be used very efficiently since only a slight loss of photocurrent occurs. In the luminaire according to the present invention, sufficiently uniform color mixing can be achieved with a relatively small number of reflections. That is, most of the light emitted from one LED hits the diffusing element as soon as it is reflected once by one side wall. Indeed, it is not excluded that only a small part of the light emitted from one LED reaches the diffusing element only after being reflected several times on the side walls or possibly even on the bottom wall. However, in order to obtain high luminous efficiency, it is considered disadvantageous that the number of reflections is too large, and can be avoided if the lighting fixture according to the present invention is used.

  The luminaire according to the present invention enables particularly uniform color mixing and also enables a very compact and space-saving structure with a simple construction.

  The saddle-shaped reflector referred to in this patent application is a reflector that is elongated in the axial direction, in particular, having a larger vertical spread than a horizontal spread. Of course, the “saddle-shaped reflector” referred to in this patent application is not limited to this structure. This term also includes reflectors whose vertical dimension substantially corresponds to the lateral extent.

  A saddle-shaped reflective element has a light exit aperture in which a diffusing element is arranged, which diffusing element is particularly useful when the luminaire is shaped as an azimuth lamp, decorative lamp or picture signal lamp, for example It is a diffusing element that shows an extremely strong diffusing effect that shines light from behind the picture to illuminate the picture signal. In this case, the light exit aperture of the bowl-shaped reflective element is simultaneously the light exit aperture of the luminaire.

  In the case of other luminaires, for example wall or ceiling lights, another auxiliary reflecting element, for example a light blade, can be named in the light path behind the light exit opening of the trough reflector or the light path behind the diffusing element Can be arranged. This makes it possible to advance or change the direction of light that has already been optimally mixed in light intensity.

  According to an advantageous embodiment of the invention, a printed circuit board with a plurality of LEDs is fixed outside the section. This allows a particularly simple assembly, since a plurality of LEDs can be fixed to the reflective element together, ie in one assembly step. Also, conventional construction of components can be retroactively implemented because the planar construction of the sections allows for the conventional attachment of the fixing elements without difficulty. Eventually, a conventional printed circuit board formed in a planar shape as a typical shape can be adopted.

  According to a further advantageous form of the invention, the printed circuit board is fixed to the section by means of screws or / and latching elements. This allows a particularly simple construction, where conventional fastening means can be employed.

  According to a further advantageous form of the invention, the LEDs protrude from the printed circuit board into the interior of the reflector. This allows the light to travel in a particularly advantageous manner, allows the light emitted from the LEDs to mix inside the reflective element, and in particular of the printed circuit board and possibly also of the heat dissipation element. Enables simple installation. Moreover, the heat dissipation element and the printed circuit board do not prevent the light from moving forward inside the reflector.

  According to a further advantageous embodiment of the invention, the section is provided with an opening. This allows the LED to pass through, or alternatively allows only the light emitted from the LED to pass through. In the latter case, the LED may be arranged outside the inner space of the reflector, for example directly adjacent to the opening.

  Preferably, at least a portion of the LED protrudes through the opening and into the interior of the reflector.

  More advantageously, a radiator is arranged outside the printed circuit board. This allows the use of conventional components, where these components are placed outside the reflector without preventing light from traveling inside the reflective element.

  According to a further advantageous embodiment of the invention, at least one printed circuit board is provided on which at least six LEDs are spaced apart from one another. Here, the LEDs are arranged in a spatially distributed manner along the inner space of the reflective element, so that the structure of the light source can be decomposed to some extent, which is particularly advantageous for light. Uniform distribution is possible. The arrangement spaced from one another can be implemented in a further advantageous way so that the LEDs are distributed substantially uniformly over the entire plane of the printed circuit board.

  More preferably, the size of the printed circuit board substantially corresponds to the majority of the plane of the section, and more preferably substantially corresponds to the majority of the plane of the sidewall. This makes it possible to arrange the LEDs in a particularly uniformly distributed manner throughout the reflector inner surface, which allows a further improved uniform color mixing.

  According to a further advantageous embodiment of the invention, at least one printed circuit board is provided, on which at least two red LEDs, two blue LEDs and two green LEDs are spaced apart from each other. This allows even more advantageous uniform color mixing with a simple construction, where conventional printed circuit boards can be employed.

  According to a further advantageous embodiment of the invention, the reflector has four side walls and in particular one bottom wall. This makes it possible to make the reflective element particularly simply from five structural parts. Here, all the structural parts may be plate-shaped. Further advantageously, both side walls, in particular all side walls and possibly also the bottom wall, each extend along a plane. This allows a particularly simple creation and also allows the light distribution of the luminaire to be set particularly well.

  According to a further advantageous embodiment of the invention, the LEDs can be activated individually or as a group to obtain a changeable mixed color of illumination. Typically, the luminaire can be connected to a central controller via a signal line, from which control signals can be received, for example according to the DALI protocol. Individual LEDs can be adjusted in intensity and can produce various mixed colors of lighting.

  According to a further advantageous embodiment of the invention, the bowl-shaped reflector extends towards the light exit opening. This allows the entire photocurrent from the LED to travel particularly well towards the light exit aperture with very few reflections, so that overall high light efficiency, i.e. luminous efficiency, can be achieved. .

  According to a further advantageous form of the invention, the reflective element has a substantially trapezoidal cross section. This allows for particularly simple creation and particularly good color mixing of light emitted from LEDs of different colors.

  According to a further advantageous form of the invention, the reflective element has a substantially triangular cross section. This also allows for a particularly simple creation.

  According to a further advantageous form of the invention, the reflective element has a substantially rectangular cross section. This also allows a particularly simple construction of the luminaire.

  According to a further advantageous embodiment of the invention, a second reflective element is arranged in the optical path behind the diffusing element of the saddle-shaped reflector and / or in the optical path behind the light exit opening. This configuration directs the luminaire in a particularly advantageous manner, e.g. for advancing or redirecting light that is optimally mixed in terms of color and light distribution in a bowl-shaped reflector, e.g. towards a building plane It can be shaped as a wall light or ceiling light. This makes it possible, for example, to produce a luminaire with a compact construction and almost no glare.

  Further advantages of the present invention will become apparent from the non-cited dependent claims and the following description. Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings.

  In the drawing, the illumination represented as a whole by 10 is arranged on the ceiling wall 11 of the room of the building as shown in FIG. This serves to illuminate the wall 12 but can also be used to illuminate the floor 14 or an object or outdoor plane not shown in a manner not shown. The person 13 shown makes the room situation clear.

  As shown in FIG. 1, the luminaire includes an illumination housing 15 that is only schematically depicted, and a reflective element 16 that will be described in detail later is disposed in the inner space L thereof. The luminaire 15 is only schematically depicted in FIG. 1 and may comprise, for example, a light cover glass (not shown) in the light outlet opening. Similarly, the shape of the luminaire housing 15 is not depicted in the drawing, but may be matched to the shape of the reflective element 16 or may be very similar. The dimensions of the housing 15 of the luminaire 10 should not greatly exceed the dimensions of the reflective element 16. This makes it possible to make the lighting apparatus 10 extremely compact as a whole. FIG. 1, on the other hand, shows a lighting housing 15 that is much larger in size than the reflective element 16.

  Preferably, a connection element such as an actuator for operating the illumination means, such as a transformer, a controller, a connection circuit, etc., is arranged in the luminaire inner space L but outside the reflector 16. . The luminaire may be connected to a control device (not shown) via a signal line, and is obviously connected to a voltage supply line.

  Arranged in the luminaire 15 is a lighting means in the form of a plurality of differently colored LEDs as invented. The luminaire 10 emits a uniform light in terms of its intensity and in terms of its mixed color, so that the wall 12 is illuminated as uniformly as possible within the conical shape 17. . It is also an object of the present invention to prevent the user 13 from disassembling the illumination means when viewing the luminaire 15 from various viewing angles.

  FIG. 2 very schematically shows a first embodiment of the inventive reflective element 16 of the luminaire 10 as a partially cut away cross-sectional detail. The reflective element 16 is substantially bowl-shaped and trapezoidal in cross section and longitudinal section, and as best seen in FIG. 4, the maximum longitudinal extension l in the region of the light exit aperture 23 of the reflective element 16 It has the maximum lateral spread q. Therefore, the actual light exit opening 23 has the dimension l × q.

  The reflective element 16 has a first side wall 18 and a second side wall 19 facing it. Both side walls 18, 19 are connected to each other via a third side wall 20 and a fourth side wall 21, respectively. The upper regions of each of the four side walls 18, 19, 20, 21 are connected to each other via a bottom wall 22.

  From the cross-sectional view, it can be seen that the basic shape is substantially trapezoidal in the embodiment of FIGS. 2 to 4 in both the horizontal cross section of FIG. 2 and the vertical cross section of FIG. That is, the inner space J of the reflecting element 16 extends conically from the bottom plate 22 toward the light exit opening 23.

  A diffusing element 24 is arranged in the region of the light exit opening 23 of the reflecting element 16, which is made from a conventional disc-shaped element, for example a glass plate, sheet, etc., finished with a matte process, for example a sandblasting process. May be.

  A printed circuit board 25 a is disposed on the first side wall 18 of the reflective element 16, and its inner side 28 is adjacent to or at least aligned with the outer side 29 of the first side wall 18. Since the first side wall 18 is arranged along a plane, and thus has a planar shape or a plate shape, the printed circuit board 25a may also be planar, i.e., substantially flat. . The printed circuit board 25a is fixed to the first side wall 18 by using, for example, a screw element not depicted in FIG. 2 or a clip element instead of the screw element or a corresponding fixing means.

  A total of six LEDs 27a, 27b, 27c, 27d, 27e, and 27f are fixed to the printed circuit board 25a as best seen in FIGS. The LED may be, for example, a so-called side emitting LED or a so-called Lambertian LED. Both types of LEDs are basically distinguished in terms of their emission characteristics and are well known in the prior art.

  The LED is fixed to a printed circuit board by many brazings, and an operating voltage is supplied through the printed circuit board. The printed circuit board therefore has corresponding conductor tracks and possibly also electronic components. However, here, LED activation control and connection means for activation control are not mentioned.

  It should be noted that a heat dissipating body 26 capable of releasing the heat generated from the LED in operation is disposed on the side 30 opposite to the inner space J of the printed board 25a. The heat dissipating body 26 may also be formed in a substantially block shape or a rectangular shape, and in some cases, a plate shape, or a surface having a size necessary for heat dissipation.

  As can be seen from the schematic diagram of FIG. 3, the individual LEDs 27a, 27b, 27c, 27d, 27e, and 27f are spaced from each other by a distance s. That is, since the LEDs 27a, 27b, 27c, 27d, 27e, and 27f are arranged in a lattice distribution along the first side wall 18, a substantially uniform light distribution can be created. The LEDs 27a, 27b, 27c, 27d, 27e, 27f are arranged in a substantially uniformly distributed manner over the entire plane of the side wall 18, as can be seen from FIG.

  Six openings (not shown) are arranged on the first side wall 18, and LEDs 27 a, 27 b, 27 c, 27 d, 27 e, 27 f fixed to the printed circuit board 25 a penetrate through the openings, as shown in FIG. It protrudes into the inner space J.

  Depending on the type of LED to be selected, for example, the distribution of light emitted by the LED differs depending on whether the LED is a side emitting LED or a Lambertian LED. Any type of LED can be used. The optical path inside the reflector 16 will be described later.

  Furthermore, it should be noted that the printed circuit board 25b only schematically illustrated in FIG. 2 is arranged on the second side wall 19 facing the first side wall 18, and three LEDs 27g, 27h, and 27i is fixed (see FIG. 4). Moreover, although not drawn in FIG. 2 for the printed circuit board 25b, a heat radiator may be provided. The second side wall 19 is also arranged along one plane.

  2 to 4, a printed circuit board 25 a having six LEDs is attached to the first side wall 18, and a printed circuit board 25 b having three LEDs is attached to the second side wall 19. It is installed. A large printed circuit board with more than six LEDs may be attached to the second side wall 19. Further, a small printed circuit board with only three LEDs may be attached to the first side wall 18 instead of a large printed circuit board with six LEDs.

  However, in order to make the reflective element 16 compact, the LEDs are preferably arranged in a flat section of the side walls 18 and 19 so that the LEDs are arranged evenly distributed over the respective planes of the side walls 18 and 19 if possible. Is preferred. Therefore, in most cases, a printed circuit board having a size approximate to each dimension of the side wall and filling as much of the plane of the side wall as possible is used.

  For example, instead of one large-sized printed circuit board such as the printed circuit board 25a on the side of the side wall 18, a plurality of smaller printed circuit boards may be juxtaposed, and the overall dimension is the dimension of the side wall, or at least It may be a size substantially corresponding to the dimension of the flat section of the sidewall.

  It should be noted here that the side walls 18, 19, 20, 21 and the bottom wall 22 of the reflector 16 shown in FIGS. 1 to 3 have a reflecting effect, and preferably have a large reflecting effect. That is.

  Next, an advantageous color mixture of light emitted from the LED will be described with reference to FIG.

  As shown in FIG. 2, the LED 27 a emits, for example, a light beam b, which is reflected by the second side wall 19 and subsequently strikes the diffuser 24.

  The LED 27 b emits a light beam c, which is likewise reflected by the second side wall 19 and subsequently strikes the diffuser 24.

  The LED 27g emits a corresponding light beam, which is reflected by the side wall 18 and then strikes the diffusing element 24.

  Regardless of whether a side emitting LED or a Lambertian LED is used, the three light beams a, b, and c shown in FIG. 2 are representative. Most of the light emitted from the LED 27 g is reflected by the first side wall 18 and then strikes the diffusing element 24. Similarly, most of the light emitted from the LED 27 a and most of the light emitted from the LED 27 b are reflected by the second side wall 19.

  Therefore, the light that strikes the diffuser 24 is light with a mixture of colors. As is typical in diffuser 24, the diffusing element can further mix light. This is represented by outward arrows a ', b', c '.

  As is clear from FIG. 4, most of the light emitted from the LED is reflected by the side walls facing each other. This can be realized by appropriately aligning the direction of the LED and the side walls 18 and 19. Therefore, for example, in the case of an LED (for example, LED 27e) arranged on the side edge of the printed circuit board 25a, the light portion represented by the light beam e is reflected by the facing side wall 19 and then exits through the diffusing element 24. . On the other hand, among the light emitted from the same LED 27e, the other light portion represented by the light beam f is reflected by the narrow side wall 21 of the diffuser 16, and then viewed by the observer in FIG. And exits through the diffusion element 24 located behind. The arrows d, e, f representing the optical path in FIG. 4 end where the light exits from the inner space J of the reflecting element 16 through the diffusing element 24.

  Since most of the entire light beam is first reflected by the side walls and then strikes the diffusing element 24, the total amount of light reaching the diffusing element 24 is already mixed. The diffusing element 24 can further improve its color mixing when exposed to light.

  It should be noted that the maximum lateral extent q of the reflective element 16 may be, for example, between 20 mm and 150 mm, preferably on the order of 50 mm, and the longitudinal extent l of the reflective element 16 is between 30 mm and 150 mm, Preferably, it may be about 75 mm. Similarly, the bottom wall 22 may have a longitudinal extent m of 30 mm to 90 mm, preferably about 55 mm, and a lateral extent n of, for example, about 10 to 50 mm, preferably about 21 mm.

  It should be noted that the placement of the illustrated printed circuit boards 25a and 25b, and the creation of the corresponding attached side walls 18 and 19 are merely examples. What is decisive is that two side walls 18 and 19 facing each other are provided, which at least have a flat section on which the printed circuit board with the LEDs can be fixed. Preferably, as illustrated in the above embodiment, all of the side walls 18, 19, 20, 21 are each shaped along a plane, i.e. planar.

  Furthermore, the number of LEDs marked on the printed circuit board should be understood as an example only. Preferably, 6 to 30 LEDs are arranged in the bowl-shaped reflector 16. However, the number of LEDs, their placement, what LEDs of which color are located in which locations, and how far apart the LEDs are from each other are the intended use, the overall size of the reflector 16 It depends on the desired photocurrent.

  The embodiment of FIG. 5 similar to FIG. 2 shows a substantially triangular reflector 16 with LEDs arranged in a comparable manner. The printed circuit board and the radiator are not shown here. The color mixing of the light emitted from the LEDs 27a, 27b, and 27g is performed in the same manner as in the above-described embodiment.

  The embodiment of FIG. 5 requires a bottom wall 22 as shown in FIG. If a bottom wall is provided, the bottom wall 22 also reflects light and contributes to advancement toward the light exit opening 23 of the reflective element 16.

  The third embodiment of FIG. 6 comprises a reflective element 16 having a substantially rectangular cross section. Here, the LEDs 27a, 27b, and 27g are arranged with a slight inclination with respect to the side walls 18 and 19, respectively, and the inclination is exaggerated in the drawing. The LEDs 27a and 27b may be arranged on a common printed circuit board (not shown), where the printed circuit board has a corresponding staggered pattern to achieve the desired arrangement of LEDs shown in FIG. There may be steps. Alternatively, separate printed circuit boards may be assigned to the LEDs 27a and 27b. Finally, since it is possible to arrange the LEDs with a slight inclination with respect to the printed circuit board not depicted in FIG. 6, the printed circuit board has a shape adjacent to it in plan view with respect to the side walls 18 and 19, respectively. It can be fixed with. This again makes it easier to fix the printed circuit board to the side wall.

  It should be noted that the LED shown in the figure is exaggerated and drawn large, and in fact, the LED itself has only such a small size that it does not interfere with the color mixture of light and in particular does not create a shadow. That is.

  Although not shown in the drawings, the side walls 18 and 19 are provided with openings, which are respectively connected to the LEDs 27a, 27b, 27c, 27d, 27e, 27f, and 27g fixed to the corresponding printed circuit boards 25a and 25b. It penetrates and projects into the inner space J of the reflector 16. However, it can be clearly seen in FIG. 3 that these openings are at the location of the LEDs on the corresponding side walls.

  As is apparent from the foregoing, the associated side walls 18, 19 to which the LEDs are fixed are shaped to be perfectly flat and thus have a flat section as invented. For other shapes of reflectors not shown, the side walls 18, 19 may not be perfectly flat, may show bulges and curves, and need only have a flat section for mounting the printed circuit board. .

  In an embodiment not shown, the narrow side walls or front side walls 20 and 21 may also have LEDs. However, since the area is already larger, the LEDs are preferably arranged on the vertical side walls 18 and 19 if possible.

  Next, a further embodiment of the luminaire 10 according to the present invention will be described with reference to FIG. Illustrated here is a luminaire 10 which uses a lighting housing 15 in which the reflective element of FIG. 2 is arranged in the interior, here the light path behind the light outlet opening 23 of the reflective element 16. The secondary reflective element or the second reflective element 31 is disposed in The second reflective element 31 is substantially blade-shaped, that is, has a bulging or curved shape, and generally emits light emitted from the LED, and the building wall 12 (not shown in FIG. Useful for throwing towards (see). This second reflective element 31 leads directly to the reflective element 16 or the diffusing element 24 and may end in the region of the light outlet opening 32 of the luminaire 10, for example. Additional reflective elements such as the reflective element 33 depicted in FIG. 7 may be provided as well. The reflective elements 31 and 33 may be fixedly connected to the lighting housing 15 and may also serve as a support structure for fixing the reflective element 16.

  Referring to FIG. 7, it can be clearly seen that only a portion of the light passing through the diffusing element 24 strikes the reflective element 31 as indicated, for example, by the light arrow a '. The other light indicated by the light arrows c ′ and b ′ passes through the diffusing element 24 and leaves the luminaire 10 through the light outlet opening 32 of the luminaire 10 without hitting one of the reflective elements 31 or 33. .

  As is clear from FIG. 7, it is also possible to fit the bowl-shaped reflective element 16 in separate lighting fixtures having separate secondary reflective elements 31. Then, for example, a compact unit as shown in FIG. 2 can be employed in the same or comparable form, which can be fitted into separate luminaires 10 with separate secondary reflective elements 31. . This allows the creation of a modular style of luminaire.

1 is a schematic view of a room including an embodiment of a luminaire according to the present invention that is arranged on a ceiling wall of a room of a building and illuminates the side wall of the room. FIG. 2 is a detail view of a partially cut away portion of the reflective element of the first embodiment of the luminaire with a substantially trapezoidal reflective element shown in FIG. 1. FIG. 3 is a side view of the embodiment shown in FIG. 2 in the direction of arrow III in FIG. 2. FIG. 4 is a plan view of the embodiment shown in FIG. 2 in the direction of arrow IV in FIG. 3, where a diffusing body is omitted for the sake of clarity. FIG. 3 shows a second embodiment of the luminaire according to the invention shown in FIG. 2 with a reflective element having a triangular cross section. FIG. 4 is a diagram of a third embodiment of the luminaire according to the invention shown in FIG. 2 with a reflective element having a substantially rectangular cross section. It is a figure of the 4th Example which has arrange | positioned the 2nd reflective element in the optical path behind the light exit opening of the bowl-shaped reflective element of the lighting fixture by this invention shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Illumination 15 Illumination housing 16 Reflector or reflection element 18 Side wall 19 Side wall 23 Light exit opening 24 Diffuser or diffusion element 25 Printed circuit board 27 LED

Claims (22)

A reflector (16) having at least two side walls and reflecting inside is provided, and the first side wall (18) faces the second side wall (19) and is provided on the reflector. A luminaire (10), in particular, fixed to a building plane or a building part plane (11), in which a diffusing element (24) is arranged in a light outlet opening (23) formed,
At least the first side wall (18) and the opposing second side wall (19) each have at least one section (18, 19) aligned along a plane, of different colors. A plurality of LEDs (27a, 27b, 27c, 27d, 27e, 27f, 27g) are arranged, and most of the light emitted from the LED (27a) arranged on one side wall (18) is the other side. Arranged to reach the diffusing element (24) only after being reflected by the side wall (19),
A lighting apparatus characterized by that.   The printed circuit board (25a) with a plurality of LEDs (27a, 27b, 27c, 27d, 27e, 27f) is fixed to the outside (29) of the section (18). The lighting fixture as described in.   Luminaire according to claim 2, characterized in that the printed circuit board (25a) is fixed to the section (18) by means of screws and / or latching elements.   The lighting apparatus according to claim 2 or 3, wherein the LED protrudes from the printed board (25a) into an inner space (J) of the reflector (16).   5. A luminaire according to one of claims 2 to 4, characterized in that an opening is provided in the section (18, 19).   The luminaire of claim 5, wherein the LED penetrates at least partially through the opening.   The luminaire according to one of claims 2 to 6, wherein a radiator (26) is arranged on the outside (30) of the printed circuit board (25a).   At least one printed circuit board (25a) is provided, on which at least six LEDs (27a, 27b, 27c, 27d, 27e, 27f) are spaced apart from each other. Item 8. A lighting fixture according to item 1 of item 2-7.   At least one printed circuit board (25a) is provided on which at least two red LEDs (27a, 27b), two blue LEDs (27c, 27d) and two green LEDs (27b, 27e) are spaced apart from each other. The lighting fixture according to claim 8, wherein the lighting fixture is arranged.   Luminaire according to one of the preceding claims, characterized in that the reflector (16) has four side walls (18, 19, 20, 21).   Luminaire according to one of the preceding claims, characterized in that the reflector (16) has a bottom wall (22).   Luminaire according to one of the preceding claims, characterized in that the first and second side walls (18, 19), in particular four side walls, each extend along a plane.   Luminaire according to one of the preceding claims, characterized in that the reflective element (16) consists of at least five structural parts (18, 19, 20, 21, 22) fixed to one another.   A luminaire according to one of the preceding claims, characterized in that the LEDs can be activated individually or as a group to obtain a changeable mixed color of illumination.   2. A luminaire according to one of the preceding claims, characterized in that the bowl-shaped reflector (16) extends towards the light outlet opening (23).   Luminaire according to one of the preceding claims, characterized in that the reflective element (16) has a substantially trapezoidal cross section.   16. A luminaire according to one of the preceding claims, characterized in that the reflective element has a substantially triangular cross section.   16. A luminaire according to one of the preceding claims, characterized in that the reflective element has a substantially rectangular cross section.   Luminaire according to one of the preceding claims, characterized in that the light exit opening (23) is shaped in a rectangle.   Illumination according to one of the preceding claims, characterized in that a second reflective element (31) is arranged in the optical path behind the light exit opening (23) of the reflector (16). Instruments.   21. Luminaire according to claim 20, characterized in that the second reflective element (31) is made in the form of a kind of light blade, in particular curved.   22. A luminaire according to claim 20 or 21, characterized in that the second reflective element (31) is only exposed to a part of the light penetrating the diffusing element (24).

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