EP1979668A2

EP1979668A2 - Lamp with a box-like lamp housing an a light outlet element

Info

Publication number: EP1979668A2
Application number: EP07711419A
Authority: EP
Inventors: Gerald Ladstätter; Patrik Gassner; Manfred Petschulat
Original assignee: Zumtobel Lighting GmbH Austria
Current assignee: Zumtobel Lighting GmbH Austria
Priority date: 2006-02-01
Filing date: 2007-01-31
Publication date: 2008-10-15
Anticipated expiration: 2027-01-31
Also published as: WO2007088036A2; US20090303737A1; WO2007088036A3; US8201978B2; EP1979668B1; DE102006027207A1; CN101371071B; CN101371071A; EP2476949A2; EP2476948A2

Abstract

The invention relates to a lamp (1) with a box-like housing (2) for housing at least one elongated light source (3) and at least one reflector surface (4), arranged next to the light source (3) - seen from the region for illumination - said lamp housing (2) forming a light outlet opening closed by a light outlet element (5). The light outlet element has a first light emission characteristic in an emission region (A) essentially in front of the light source (3) and a second light emission characteristic different from the first light emission characteristic in a second emission region (B) separate from the first emission region (A).

Description

Luminaire with a box-shaped luminaire housing and a

Light-emitting element

The present invention relates to a luminaire according to the preamble of claim 1, which has a box-shaped luminaire housing for receiving at least one elongated light source and at least one - viewed from the area to be illuminated - arranged next to the light source reflector surface, wherein the luminaire housing forms a light exit opening, which is completed by a light exit element for emitting light.

A comparable luminaire is known from WO 01/59364 A1 of the Applicant. This is a luminaire which is directed towards a light, that is to say within a certain angular range, and in which, on the other hand, the area of the luminaire provided for directional light emission is additionally brightened in its surroundings. For this purpose, the known luminaire in addition to the light source, in front of the viewed in the emission direction a grid is arranged on additional reflector wings, which extend laterally from the light source, and arranged in front of the reflector wings diffusers. The reflector wings form, with the respective diffuser arranged in front of them, laterally next to the light source or the grid located so-called light chambers into which a part of the light emitted by the light source is irradiated and then emitted via the diffusers. The configuration of the various elements is chosen such that the most uniform possible lightening of the area surrounding the luminaire grid is achieved. At the same time, the luminaire is characterized by its extremely low height.

The homogeneous light output via the located on both sides of the grid diffusers is achieved in this known lamp in particular by a special design of the reflectors and the diffusers. Both elements are concavely shaped in the known luminaire in order to achieve improved light distribution. If, in this case, the known luminaire is used as a ceiling luminaire, this means that the diffuser, proceeding from the edge of the housing, extends inwards in the direction of the housing base. This in turn has the consequence that, in particular, the area around the light grid provided for directional light emission is susceptible to contamination. Furthermore, while the area surrounding the luminaire grid is lightened, it does not brighten the area surrounding the luminaire grid Ceiling area. Despite all this, however, this known lamp is very successful due to their excellent lighting properties.

The object of the present invention is to further develop the lighting concept known from WO 01/59364 A1, so that additional improvements result in the abovementioned points. As before, however, a luminaire is to be created which is comparable in terms of its lighting properties to the known luminaire.

The object is achieved by the invention specified in the independent claims. Advantageous developments of the present invention are the subject of the dependent claims.

A first inventive idea is based on the idea to improve their maintenance factor by special measures in the design of the lamp. This so-called maintenance factor depends on how often a luminaire has to be maintained, this also being understood to mean, in particular, the required cleaning of the luminaire. According to the invention, a high maintenance factor is now achieved in that the light exit opening of the luminaire housing is closed off by a light exit element which, viewed over its area, has a different light emission characteristic. In a first emission area located substantially in front of the light source, the light exit element accordingly has a first light emission characteristic, while the light exit element has a second light emission characteristic different from the first light emission characteristic in a second emission region separate from the first emission region. In this case, it can be provided, in particular, that a directed light emission takes place via the first light emission region, while, on the other hand, the light emission characteristic of the second emission region is such that here the light is emitted diffusely.

Accordingly, according to this first aspect of the invention, a luminaire with a box-shaped luminaire housing for receiving at least one elongate light source and at least one reflector surface arranged next to the light source, as seen from the area to be illuminated, is proposed, wherein the luminaire housing forms a light exit opening which is closed by a light exit element , According to the invention, the light exit element has a first light emission characteristic in a first emission region situated substantially in front of the light source, and in one of the first emission region Abstrahlbereich separate second radiation area on the first light emission different second light emission characteristic.

By using a light exit element, which emits the light in different areas in different ways, compared to the known solution of WO 01/59364 Al the maintenance factor of the lamp can be improved, since the responsible for the light output range of the light is no longer by several different components is formed, which are difficult to clean in juxtaposed configuration. In this case, the maintenance factor of the lamp can be particularly optimized in particular if, according to an advantageous development of the present invention, the underside of the Lichtaustrethungselements is substantially planar and lies in the plane of the light exit opening of the housing. Finally, in this case, the recessed luminaire flush with the surrounding ceiling area, which brings with it special advantages when cleaning the luminaire. At the same time, however, as in the known luminaire, one part of the light can be directed and the other part of the light can be emitted diffusely, so that the luminaire according to the invention has comparable photometric properties as the prior art.

The possible uses of the luminaire according to the invention can also be improved according to another embodiment of the present invention in that the light exit element is adjustable in the light emission direction. In this case, in particular, it is possible to easily project the light exit element with respect to the luminaire housing. This opens up the possibility of emitting light laterally over side wall regions of the light exit element and thus additionally lightening the ceiling area surrounding the luminaire. Accordingly, the lighting properties of the lamp according to the invention are further improved in this way. It can be provided in particular that the light exit element forms a unit with the light source and the reflector surface, which is mutually adjustable relative to the lamp housing. In this way, it is ensured that the arrangement between the light source (s), reflector surface (s) and light exit element to each other always remains the same.

As already mentioned, the light exit element used in the luminaire according to the invention is preferably configured in such a way that the light leaving the luminaire via the first emission region of the light exit element is emitted only in a certain angular range, that is to say directionally. In this way, a glare-free illumination of the lying below the light Space achieved. The luminaire according to the invention is therefore also suitable in particular for use on computer workstations where reflections on the surface of a screen or the like are to be avoided.

These special optical properties of the light exit element can, for example, be achieved by having a light influencing element, in particular a prism, grating or grid structure, which influences the light output in a corresponding manner in the first emission area. For this purpose, it may be provided that the light exit element is formed by a - preferably integrally formed - light exit disc, which is substantially crystal clear in the first emission, wherein on the top and / or bottom of the light exit plate a prism, grid or grid element is arranged. This light influencing element may be integrally connected to the light exit disk, but there is also the possibility to glue it to the top or bottom with the light exit plate to lock or otherwise connect. Such prismatic, grid or grid structures are known, for example, from DE 103 15 268 A1 or DE 10 2004 039 676 A1 and will be explained in more detail below. The second emission region surrounding the first emission region can then be treated, for example, such that the preferred diffuse light emission is achieved.

The previously mentioned idea that the light exit element be designed such that it is adjustable with respect to the luminaire housing in the light emission direction, can also be used regardless of whether the light exit element has different light emission characteristics in different areas or not. Regardless of this, the advantage is achieved that at a position of the light exit element, in which this protrudes slightly opposite the lamp housing, the ceiling area surrounding the recessed light is brightened.

According to a second aspect of the present invention, a luminaire with a box-shaped luminaire housing for receiving at least one elongated light source and at least one - as viewed from the area to be illuminated - next to the light source reflector surface is proposed, wherein the luminaire housing forms a light exit opening, which by a Light exit element is completed, and wherein the light exit element is adjustable in the light emission direction. The brightening of the ceiling area surrounding the luminaire can finally be achieved by a further measure, which is the subject of a third aspect of the invention. This idea is based on the idea of forming the light exit element of a plurality of sub-elements, wherein a first part element arranged substantially in front of the light source and a second sub-element is arranged substantially in front of the reflector surface, and wherein the first and / or the second sub-element seen in light emission direction are adjustable. In this variant, it is now possible to have at least one of the two parts elements projecting beyond the luminaire housing, in which case, in turn, light is emitted in such a way over its side walls that the surrounding ceiling area is brightened.

According to this third aspect of the invention, therefore, a luminaire with a box-shaped luminaire housing for accommodating at least one elongate light source and at least one reflector surface arranged next to the light source, as viewed from the area to be illuminated, is proposed, wherein the luminaire housing forms a light exit opening, which is terminated by a light exit element , and wherein it is provided according to the invention that the light exit element consists of a plurality of sub-elements, wherein a first sub-element is arranged substantially in front of the light source and a second part element substantially in front of the reflector surface, and wherein the first and / or the second part element seen in the light emission direction adjustable are. The first subelement preferably has a first light emission characteristic and the second subelement has a second light emission characteristic different from the first light emission characteristic, so that the possibility of directional light emission and supplementary diffuse illumination is again made possible.

The - preferably concave or wing-like extending - reflector surface can be formed according to a first variant by a separate reflector, ie by a separate from the lamp housing component. In a second variant, however, it would also be conceivable to form at least part of the reflector surface through the housing inner wall.

Overall, therefore, a novel lighting concept is proposed by the present invention, which leads to an easy-to-clean lamp with a high maintenance factor and particularly advantageous photometric properties.

The invention will be explained in more detail with reference to the accompanying drawings. Show it: Fig. 1 is a sectional view of a first embodiment of a lamp according to the invention;

FIG. 2 shows a variant of the luminaire shown in FIG. 1; FIG.

3a and 3b different positions of a light exit element according to the invention;

4 to 9 different variants for the realization of a different Lichtabstrahlcharakteristiken having light exit element;

10 shows a further embodiment of a lamp according to the invention, in which the light exit element is formed by a plurality of sub-elements. and

11 and 12, the lamp according to FIG. 10, wherein the sub-elements of the light exit element occupy different positions.

In the illustrated in Fig. 1 and generally provided with the reference numeral 1 recessed ceiling luminaire, the various components of the lamp 1 are arranged within a box-shaped lamp housing 2, which is sunk when mounting the lamp 1 in the ceiling of the room to be illuminated. The luminaire housing 2 has for this purpose at its edge regions laterally projecting edge strips 2a, which arrive at the onset of the housing 2 in a mounting hole of the ceiling in abutment against the ceiling and complete the mounting hole completely. These edge strips 2a can also - not shown - have brackets or wear, which allow adaptation to the thickness of the ceiling and accordingly ensure that the luminaire housing 2 is basically flush with the surrounding ceiling.

Within the housing 2, first two rod-shaped gas discharge lamps, in particular fluorescent tubes 3 are arranged, which serve as light sources of the lamp 1 and extend centrally through the lamp housing 2. Of course, the number and type of light sources could also be varied. The light of these gas discharge lamps 3 is emitted via the light exit opening formed on the front or underside of the housing 2, the light output being effected via a light exit element, which is described in more detail below, which is provided with the reference numeral 5. To ensure that the light emitted by the gas discharge lamps 3 is completely and effectively illuminated is used, two wing-like reflectors 4 are further provided, which extend to both sides of the light sources 3 to the edge region of the housing 2 out. The reflectors 4 are in particular concave, preferably concavely curved, since a very uniform light output is made possible by this particular form. As an alternative to the illustrated embodiment, it would also be possible to use a single reflector that completely spans the light sources 3 and extends to both sides of the housing.

It should also be noted that as an alternative to the illustrated embodiments, in which the reflectors are formed by separate or separate from the housing 2 components, it would also be possible to use at least partially the inner wall of the lamp housing 2 as a reflector surface. In order to achieve the preferred concave reflector surface also in this case, the housing may be angled, for example, in its Fxkbereichen or have corresponding inserts to ultimately form a concave shape formed by a plurality of partial surfaces.

In general, the luminaire 1 according to the invention shown in FIG. 1 should have comparable photometric properties as those known from WO 01/59364 A1

Lamp. It should therefore be directed to a light, so be delivered in certain angular ranges. On the other hand, light should be emitted undirected or diffused over a larger area. While this is achieved in the known lamp by the use of juxtaposed diffusers and louvre, this type of light output in the lamp according to the invention by a particular embodiment of the light exit element 5, which will now be explained in more detail.

A peculiarity of the light exit element 5 according to the invention is that it extends over the entire light exit opening of the luminaire housing 2 and terminates this accordingly completely. It can according to the

Representation in Fig. 1 may be provided in particular that the light exit element 5 is planar and arranged such that it is flush with the underside of the

Housing 2 and accordingly with the surrounding ceiling to which the lamp 1 is mounted, concludes. In this case, a particularly simple cleaning of the

Luminaire 1 allows.

Despite this particular embodiment of the light exit element 5, however, it is now ensured that light is emitted in the manner described above. Namely, the light exit element 5 is designed such that it has different light emission characteristics in different areas.

Thus, in a first emission region A, which is formed essentially below the two fluorescent lamps 3, light is emitted in a directed manner. Thus, light emitted via this exit region A leaves the light exit element 5 in such a way that the light beams do not exceed a predetermined maximum exit angle with respect to the solder on the surface of the light exit element 5. Typically, this maximum light emission angle is in a range of about 60 °, thereby ensuring that the light emitted in this way is glare-free. A person observing the luminaire 1 according to the invention is thus not dazzled. Furthermore, reflections on vertical surfaces, in particular screens and the like, are largely avoided.

In addition to this first emission area A, via which a directed light emission takes place, second emission areas B are formed on both sides thereof, via which light is emitted non-directionally, that is to say diffusely. As in the case of the known luminaire, the first emission area A provided for direct light emission is thus brightened in its surroundings, which brings with it a particular advantage from a lighting engineering point of view. For a person considering the luminaire, because of the light emission via the first emission area A, it is not always possible to detect whether the luminaire is in operation or not, which is often perceived as unpleasant. The additional, diffuse light output in all directions over the second emission ranges B, however, avoids this problem. When looking at the lamp 1 is thus readily apparent and immediately if this is turned on or not.

From the above explanation, it can therefore be seen that the light exit element 5 has different lighting properties in different areas. In the first emission area A, a directed light emission takes place, while the light exit element 5 acts as a diffuser in the second emission areas B. Since, in the illustrated embodiment, the light exit element 5 forms a surface extending over the entire opening of the housing 2, special measures must be taken by which these different light emission characteristics are achieved. There are different possibilities for this, which will be explained in more detail below.

In the exemplary embodiment illustrated in FIG. 1, it is provided, for example, that the light exit element 5 is formed by a translucent disk 50, for example of PMMA, which in the first light emission region A is crystal clear. Light rays which leave the pane 50 in this first light emission area A are thus influenced by them little or not at all. In order to achieve a directed light output despite all, it is now provided that in the first emission area A at the top of the disc 50, a complementary light influencing element 6 is arranged, which causes the corresponding light control. This supplementary light-influencing element 6 can be, for example, a microprism structure, a grid element or a grid element. Such elements are known from the prior art, for example. DE 103 15 268 Al and DE 10 2004 039 676 Al and have a plurality of parallel arranged prisms, lattice or lamellae parts, which are designed such that they the light in one Directed deflect or reflect so that this is released only in certain angular ranges. Such prism, grid or grid elements can be realized with heights of only a few millimeters, so that they can be used in the luminaire 1 according to the invention readily.

The arrangement of this supplementary light-influencing element 6 now takes place in the illustrated example in that two webs 51 extending parallel to the light sources 3 are provided on the upper side of the light exit element 5, which define a receiving region into which the supplementary light-influencing element 6 is simply inserted. An additional attachment is not mandatory in this variant, but can of course be provided.

By using the light-influencing element 6, it is thus achieved that light emitted via the first light-emitting region A is directed or bundled in a special way. The areas of the disc 50 forming the second light emission areas B, on the other hand, are treated in such a way that light passing through them is scattered and correspondingly emitted diffusely. This can be achieved by a corresponding treatment of the surface of the disc 50, alternatively, however, could be added to the material in this area also scattering body, which favor the desired diffuse light output. As a result, the desired second, different from the Abstrahlcharakterisitk the first Abstrahlbereichs A radiation characteristic is achieved.

In the case of the luminaire 1 according to the invention, it is also desired for the light emitted via the second light emission regions B to have the most uniform luminous intensity possible. Accordingly, in turn, by the reflectors 4 and the light exit element 5 arranged in front of it, two so-called light chambers 10 which are located laterally from the light sources 3 are formed, into which a part of the light sources 3 from the light sources 3 radiated emitted light and is reflected by the reflector 4 in such a manner on the light exit element 5 that the most homogeneous possible light output is achieved. The concept of such so-called light chambers is already known from the aforementioned WO 01/59364 Al.

Overall, therefore, a lamp is formed, which is comparable in terms of their lighting properties to the initially discussed known lamp. An advantage over the known lamp, however, is the higher maintenance factor, since a cleaning of the light shown in Fig. 1 due to the closed and flush bottom is much easier to perform.

FIG. 2 now shows a variant or further development of the luminaire according to FIG. 1. The development consists in the fact that now the light exit element 5 can be adjusted relative to the luminaire housing 2 in the light emission direction. In particular, it is now possible to arrange the light exit element 5 in such a way that it protrudes slightly in relation to the luminaire housing 2, as shown in FIG. 2.

In this configuration, light is initially emitted via the first and second emission regions A and B in the manner described above. Due to the vortretenden arrangement of the light exit element 5 but now also takes place an additional light output via side walls 50a of the light exit element 5, which is indicated in Fig. 2 by the arrows. The side walls 50a of the light exit element 5 are also preferably designed such that they scatter light or emit light diffusely, for which reason light emerging via these side walls 50a is emitted in the most different directions. In particular, however, the surrounding the lamp 1 ceiling areas 100 are brightened. This results in particularly advantageous photometric properties, since ultimately, starting from the first Lichtabstrahlbereich A, via which the directed light output, and the second Lichtabstrahlbereiche B, via which diffused light is emitted, a continuous transition to the surrounding ceiling areas 100 is achieved. The brightness then decreases further and further towards the outside.

It should be noted that in the exemplary embodiment according to FIG. 2, the light exit element 5 is not adjusted solely relative to the luminaire housing 2. Instead, the light sources 3, the reflectors 4 and the light exit element 5 form a structural unit, which is adjusted in its entirety relative to the housing 2. The advantage of this variant is that the arrangement of the light sources 3, the reflectors 4 and the light exit element 5 to each other is not changed, so that still the homogeneous light output via the light chambers 10 and the second Abstrahlbereiche B and the directional radiation over the first emission area A is maintained. Of course, it would also be conceivable to adjust the light exit element 5 alone. For this, a wide variety of possibilities for realizing the adjustability would be conceivable, for example, a corresponding locking with the side walls of the housing 2 or a corresponding screwing through the use of slots or multiple screw holes would be conceivable. Also, the lamp shown in Fig. 2 has a high maintenance factor, since the light exit element 5 still closes the lamp housing 2 to the front.

In the following, further possibilities for the realization of the light exit element 5 according to the invention will be explained. In all of the variants described below, it is provided that a first area is formed in the middle, via which a light output is directed, while on the other hand, a diffuse light output is obtained laterally thereof. The various variants relate in particular to different measures for the formation of the central region for the directed light emission, wherein these measures relate primarily to the attachment of a supplementary light influencing element 6 on the disk 50 of the light exit element. In principle, however, a prism structure, a grid structure or a (micro) grid can optionally be used as light-influencing element 6.

While it was provided in the embodiment according to FIGS. 1 and 2 that a prismatic, grid or grid element was arranged more or less loosely on the upper side of the translucent disk 50 of the light exit element 5, in the embodiment of FIGS. 3a and 3b provided that this supplementary light influencing element 6 is now arranged on the underside of the disc 50. For this purpose, the disc 50 has a recess or recess 52 into which the supplementary light-influencing element 6 is inserted. An attachment of the light influencing element 6 can then take place, for example, by gluing or by a two-component injection technique. Again, however, it is provided that the pane 50 of the light exit element 5 in the region of the supplementary light-influencing element 6 is made crystal clear, whereas the surrounding areas and the side walls 50a are light-scattering and accordingly act as a diffuser. In the event that the light exit element 5 is arranged projecting relative to the housing opening, in turn, a lateral light output is achieved, as shown schematically in Fig. 3b. A further variant for the formation of the light exit element 5 according to the invention is shown in FIG. 4. Again, the supplemental light influencing element 6 is arranged on the underside of the disc 50, wherein the disc 50 now has a recess 52 which forms lateral grooves or grooves 53. In these grooves 53 engage laterally projecting webs 60 of the light influencing element 6, so that it is held without additional bonding in the recess 52. For mounting, in this case, the light-influencing element 6 can be threaded into the recess 52 on the face side.

A very similar solution is shown in Fig. 5, in which the light influencing element 6 has oblique cut edges 61 on its sides. By this pinching of the light influencing element 6 in the recess 52 of the light exit element 5 is made possible.

Also in the embodiment illustrated in FIG. 6, the light-influencing element 6 is jammed with the light exit element 5. For this purpose, however, the recess 52 is now configured somewhat deeper, wherein lateral arms 62 of the light influencing element 6 have a certain flexibility and are jammed with the light exit element 5, so that the influencing element 6 can easily be snapped into the light exit element 5.

Further variants are shown in FIGS. 7 and 8. In both cases, the recess 52 is designed to receive the light-influencing element 6 stepped in their edge regions, wherein in the example of FIG. 7, a light-tight strip 63 is partially bonded to the disc 50 and the light influencing element 6. In this way, an optical separation of the first emission area A for the directed light output and the second emission area B for the diffuse light output is additionally achieved. In the variant according to FIG. 8, a glass-clear disk or film is adhesively bonded to the underside of the light-influencing element 6 over its entire surface so that it is connected to the disk 50.

All variants described are characterized in that a substantially planar surface for the light exit element 5 is formed, which allows easy cleaning of the lamp. Furthermore, in all cases an adjustability of the light exit element 5 relative to the luminaire housing 2 can be achieved, since laterally upwardly projecting side walls 50 a are provided. In contrast, in the variant according to FIG. 9, an adjustability of the light influencing element 5 is not possible. In this embodiment, the light exit element is formed by a sandwich structure, which on its underside a glass clear disc, for example. PMMA, and at its top a diffusely scattering film 56 has. Between two elements 55 and 56 on the one hand a diffuser disk 57 and on the other hand, a light influencing element 6 are arranged. This sandwich structure is held together at their end faces by brackets 58, so that a particularly simple structure for the light exit element 5 results.

In all embodiments described above, the light exit element 5 was formed by an element which as a single component, the lamp housing to the front completely completed and - if provided - could be adjusted relative to the housing. 10 to 12 now show an alternative embodiment of a luminaire according to the invention, in which further possibilities for adjustability of the light exit element exist, by which a brightening of the surrounding ceiling area is made possible.

First, the lamp 1 shown in Fig. 10 is constructed in a comparable manner as the lamp of FIG. 1, that is, it consists of a box-shaped lamp housing 2, one or more rod-shaped light sources 3, wing-like reflectors 4 and a light exit element 5, which the front of the Housing 2 closes. A difference now, however, is that the light exit element 5 is formed by a plurality of sub-elements, each of which cause a certain amount of light output and - as will be explained in more detail later - are adjustable in light emission direction. A first subelement is provided with the reference numeral 20 and forms the intended for the directed radiation first Abstrahlbereich A. Accordingly, the sub-element 20 is below the light sources 3. Further second sub-elements 25 are arranged on both sides of the first sub-element 20 and each form the second Lichtabstrahlbereiche B, via which a diffuse light emission takes place. All three juxtaposed sub-elements 20 and 25 form in their entirety the light exit element 5, which closes the lamp housing 2 to the front.

The first sub-element 20 has a lower light-emitting surface 21 and side walls 22. The light exit surface 21 is designed in such a way that light passing through it is emitted in a directionally directed manner. Accordingly, in turn, the previously described measures for achieving a directed light output can be used. In particular - as shown - between the side walls 22 a Micro grid, a grid or prism element as a light influencing element 6 are inserted. The light exit surface 21 is in turn configured to be crystal clear in this case. The variants described with reference to FIGS. 3 to 8 would also be conceivable for the formation of a light exit element for directional light emission. The side walls 22 of the first sub-element 20, however, are preferably designed diffusely radiating, as over this side walls emitted light should be scattered as possible in different directions.

The second sub-elements 25 are like the first sub-element 20 pot-shaped, so have a lower light exit surface 26 and side walls 27. Since the second sub-elements 25 define the second radiating surface B, however, it is now provided that all walls of the second sub-elements 25 are designed to be light-scattering, so that these elements thus act completely as diffusers.

A special feature of this lamp 1 is now that at least one of the two sub-elements 20, 25, preferably both are adjustable in the light emission direction. Thus, it is initially possible to arrange all the elements 20, 25 such that they are flush with the luminaire housing 2 and thus with the surrounding ceiling area. As shown in FIG. 11, however, the two lateral second sub-elements 25 could also be arranged standing on top. As in the exemplary embodiment according to FIG. 2, it is thus achieved that light is radiated diffusely over the side walls 27 of the second sub-elements 25 so that surrounding ceiling areas are brightened. However, as before, the preferred directional light emission to the underside takes place via the first subelement 20. Furthermore, the area surrounding the first sub-element 20 is brightened over the lower sides 26 of the second sub-elements 25.

As an alternative to the configuration in FIG. 11, it could also be provided that the first sub-element 20 is arranged in the upward direction, whereas the second

Partial elements 25 flush with the lamp housing 2. Also at this in

12 variant shown a lateral diffuse light output via the

Side walls 22 of the first sub-element 20. The effect of brightening surrounding

Ceiling areas here, however, is significantly lower, since these side walls 22 are arranged further away from the edge regions of the lamp housing. Despite everything, positive photometric properties are also achieved in this variant.

The possibility of adjusting the sub-elements in the light-emitting direction can in turn be opened by suitably connecting them with the Side walls of the lamp housing 2 can be latched. A corresponding screwing in the desired position can also be provided.

In summary, therefore, a luminaire is created by the present invention, which on the one hand is easy to clean and, accordingly, a high

Maintenance factor has. On the other hand, at least comparable positive photometric properties as in already known luminaires are achieved. Furthermore, if a configuration is selected in which the light exit element or parts thereof protrude with respect to the luminaire housing, the ceiling area surrounding the luminaire can additionally be brightened. The photometric properties of the luminaire according to the invention are thereby even further improved.

Claims

P32463Ansprüche

1. luminaire (1) with a box-shaped luminaire housing (2) for receiving at least one elongate light source (3) and at least one - viewed from the area to be illuminated - next to the light source (3) arranged reflector surface (4), wherein the luminaire housing ( 2) forms a light exit opening, which by a

Light exit element (5) is completed, characterized in that the light exit element (5) in a substantially in front of the light source (3) located first Abstrahlbereich (A) has a first Lichtabstrahlcharakteristik and in one of the first Abstrahlbereich (A) separate second Abstrahlbereich (B ) a different from the first Lichtabstrahlcharakteristik second

Has light emission characteristic.

2. Lamp according to claim 1, characterized in that on the first emission area (A) the light (1) leaving light is emitted only in a certain angular range.

3. Luminaire according to claim 2, characterized in that on the second radiation area (B) the light (1) leaving light is diffused diffused.

4. Luminaire according to claim 2 or 3, characterized in that the light exit element (5) in the first emission area (A) has a light influencing element (6), which causes a directed light output.

5. Lamp according to claim 4, characterized in that the light influencing element (6) has a prism, grid or grid structure.

6. Lamp according to claim 4 or 5, characterized in that the light exit element (5) has a light exit disc (50) which is crystal clear in the first emission area (A), wherein at the top and / or bottom of the first emission area (A) the light influencing element (6) is arranged.

7. Lamp according to claim 6, characterized in that the light influencing element (6) is integrally connected to the light exit plate (50).

8. Lamp according to claim 7, characterized in that the light-influencing element (6) with the light exit plate (50) is latched or rests on the upper side of the light exit disc (50).

9. Lamp according to one of the preceding claims, characterized in that the light exit element (5) in the plane of the light exit opening of the lamp housing (2).

10. Lamp according to one of claims 1 to 8, characterized in that the light exit element (5) is adjustable in the light emission direction.

11. Luminaire (1) with a box-shaped luminaire housing (2) for receiving at least one elongated light source (3) and at least one - viewed from the area to be illuminated - next to the light source (3) arranged reflector surface (4), wherein the luminaire housing ( 2) forms a light exit opening, which by a

Light exit element (5) is completed, characterized in that the light exit element (5) is adjustable in the light emission direction.

12. Light according to claim 10 or 11, characterized in that the light exit element (5) together with the light source (3) and the reflector surface (4) is adjustable.

13. Luminaire according to one of claims 10 to 12, characterized in that the light exit element (5) in the edge region against the housing (2) directed towards side walls (5Oa).

14. Luminaire according to claim 13, characterized in that the side walls (5Oa) of the light exit element (5) act light-scattering.

15. Luminaire according to one of the preceding claims, characterized in that the underside of the Lichtaustrementsements (5) is substantially planar.

16. Lamp according to one of claims 1 to 8, characterized in that the light exit element (5) consists of a plurality of sub-elements (20, 25), wherein a first sub-element (20) arranged substantially in front of the light source (3) and a second sub-element (25) is arranged substantially in front of the reflector surface (4) and wherein the first and / or the second sub-element (20, 25) are adjustable in the light emission direction.

17. Luminaire according to claim 16, characterized in that the first subelement (20) forms the first emission region (A) and the second subelement (25) forms the second emission region (B).

18 light (1) housing with a box-shaped luminaires (2) for receiving at least one elongated light source (3) and at least one - viewed from the area to be illuminated - next to the light source (3) arranged reflector surface (4), wherein the luminaire housing (2) forms a light exit opening, which is closed by a light exit element (5), characterized in that the light exit element (5) consists of a plurality of sub-elements (20, 25), wherein a first sub-element (20) substantially in front of the light source (3 ) and a second sub-element (25) is arranged substantially in front of the reflector surface (4) and wherein the first and / or the second sub-element (20, 25) are adjustable in the light-emitting direction.

19. Luminaire according to claim 18, characterized in that the first sub-element (20) has a first Lichtabstrahlcharakteristik and the second sub-element (25) has a relation to the first Lichtabstrahlcharakteristik different second Lichtabstrahlcharakteristik.

20. Luminaire according to one of claims 16 to 19, characterized in that the two partial elements (20, 25) in the edge region against the housing (2) directed towards side walls (22, 27), which act light scattering.

21. Light according to one of the preceding claims, characterized in that the reflector surface (4) is formed like a wing.

22. Luminaire according to one of the preceding claims, characterized in that the reflector surface (4) is at least partially formed by an inner wall of the lamp housing (2).

23. Luminaire according to one of claims 1 to 21, characterized in that the reflector surface (4) is formed by a separate reflector.

24. Luminaire according to one of the preceding claims, characterized in that it is symmetrical and extends on both sides of the light source (3) has a reflector surface (4).