EP1979668B1 - Lamp with a box-like lamp housing an a light outlet element - Google Patents

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

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Publication number
EP1979668B1
EP1979668B1 EP07711419.7A EP07711419A EP1979668B1 EP 1979668 B1 EP1979668 B1 EP 1979668B1 EP 07711419 A EP07711419 A EP 07711419A EP 1979668 B1 EP1979668 B1 EP 1979668B1
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EP
European Patent Office
Prior art keywords
light
lamp
emission
lamp according
sub
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP07711419.7A
Other languages
German (de)
French (fr)
Other versions
EP1979668A2 (en
Inventor
Gerald Ladstätter
Patrik Gassner
Manfred Petschulat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zumtobel Lighting GmbH Austria
Original Assignee
Zumtobel Lighting GmbH Austria
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zumtobel Lighting GmbH Austria filed Critical Zumtobel Lighting GmbH Austria
Priority to EP12164054A priority Critical patent/EP2476949A2/en
Priority to EP12164020A priority patent/EP2476948A2/en
Publication of EP1979668A2 publication Critical patent/EP1979668A2/en
Application granted granted Critical
Publication of EP1979668B1 publication Critical patent/EP1979668B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/002—Refractors for light sources using microoptical elements for redirecting or diffusing light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/02—Lighting devices intended for fixed installation of recess-mounted type, e.g. downlighters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/02—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/02—Refractors for light sources of prismatic shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/101—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening permanently, e.g. welding, gluing or riveting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/102—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening using gravity or suction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/104—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening using feather joints, e.g. tongues and grooves, with or without friction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
    • F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Definitions

  • 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 light is from the WO 01/59364 A1 the applicant known.
  • 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.
  • 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.
  • 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 present invention is based on the object, which from the WO 01/59364 A1 develop further known lighting concept, so that there are additional improvements in the above-mentioned points.
  • a luminaire is to be created which is comparable in terms of its lighting properties to the known luminaire.
  • the EP1 279 899 A describes, for example, a box-shaped luminaire with a transparent, planar Lichtabstrahlelement carrying a grid element on the inside of the Lichtabstrahlelements, while the EP 1 195 551 A2 a luminaire shows with a diffuser element which can be inserted into a holder on the underside of the light exit element.
  • a similar solution is also in a light exit element according to the US 4,891,737 A realized.
  • the US 4,263,639 A Diffuser elements, which are arranged in different levels.
  • the shows GB 951,159 A a luminaire, which has an adjustable light exit element, and a reflector which can be adjusted together with the light exit element.
  • a light-emitting device which has translucent panels with prismatic surfaces suspended from a ceiling.
  • 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.
  • 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.
  • the light exit element 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.
  • the underside of the light exit element is flat.
  • the light exit element has, in the first emission area, a light influencing element which effects a directed light output, wherein the light exit element has a light exit disc which is crystal clear in the first emission area and the light influencing element is arranged on the top and / or bottom side of the first emission area.
  • 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 ,
  • 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 Abstrahl Scheme separate second radiation area on the first light emission different second light emission characteristic.
  • the maintenance factor of the lamp can be improved because the responsible for the light output range of the lamp is no longer formed by several different components, which are difficult to clean in juxtaposed configuration.
  • the maintenance factor of the luminaire can be particularly optimized, in particular, according to the invention, when the underside of the light exit element is substantially planar and lies in a further development in the plane of the light exit opening of the housing.
  • the recessed luminaire flush with the surrounding ceiling area, which brings with it special advantages when cleaning the 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.
  • the light exit element is adjustable in the light emission direction.
  • the lighting properties of the lamp according to the invention are further improved in this way.
  • the light exit element with the light source and the reflector forms a unit which is adjustable relative to the lamp housing together. 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • prism, grid or grid structures are, for example, from the DE 103 15 268 A1 or the DE 10 2004 039 676 A1 known 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.
  • a brightening of the ceiling area surrounding the lamp can finally be achieved by a further measure, which is the subject of a development 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 disposed substantially in front of the light source and a second part element is disposed substantially in front of the reflector surface, and wherein the first and / or the second sub-element seen in light emission direction are adjustable.
  • a luminaire with a box-shaped luminaire housing for receiving at least one elongated 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 terminated by a light exit element.
  • the light exit element consists of several 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 are seen in the light emission direction adjustable ,
  • the first subelement preferably has a first light emission characteristic
  • the second subelement has a second light emission characteristic different from the first light emission characteristic, which in turn enables the possibility of directional light emission as well as complementary diffuse illumination.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the reflectors are formed by separate or separate from the housing 2 components
  • the housing can be angled, for example, in its corner regions or have corresponding inserts to ultimately form a concave shape formed by a plurality of partial surfaces.
  • the in Fig. 1 illustrated lamp 1 according to the invention have comparable photometric properties as that of the WO 01/59364 A1 known light. 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 be provided in particular that the light exit element 5 is flat and arranged such that it is flush with the bottom of the housing 2 and accordingly with the surrounding ceiling to which the lamp 1 is mounted, completes. In this case, a particularly simple cleaning of the lamp 1 is made possible.
  • the light exit element 5 is designed such that it has different light emission characteristics in different areas.
  • a first emission region A which is formed essentially below the two fluorescent lamps 3
  • light is emitted in a directed manner.
  • this exit region A leaves the light exit element 5 such 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.
  • this maximum light exit angle is in a range of about 60 °, which ensures 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.
  • second emission areas B are formed on both sides thereof, via which light is emitted non-directionally, that is to say diffusely.
  • 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.
  • 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 avoids this problem. When looking at the lamp 1 is thus readily apparent and immediately if this is turned on or not.
  • the light exit element 5 has different lighting properties in different areas.
  • a directed light emission takes place, while the light exit element 5 acts as a diffuser in the second emission areas B.
  • 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.
  • the light exit element 5 is formed by a translucent disk 50, for example of PMMA, which projects in the first light emission area 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.
  • 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.
  • the DE 103 15 268 A1 and DE 10 2004 039 676 A1 are known and have a plurality of mutually parallel prisms, lattice or lamella parts, which are designed such that they deflect the light seen in one direction or reflect that this is emitted 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.
  • 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.
  • the light-influencing element 6 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 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.
  • the desired second different from the Abstrahl characterisitk the first Abstrahl Kunststoffs A radiation characteristic is achieved.
  • the light emitted via the second light emission regions B it is also desired for the light emitted via the second light emission regions B to have the most uniform luminous intensity possible.
  • 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 from the aforementioned WO 01/59364 A1 known.
  • Fig. 2 now shows a variant or development of the lamp according to Fig. 1 ,
  • the development consists in that now the light exit element 5 relative to the lamp housing 2 in the light emission direction is adjustable.
  • the light exit element 5 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 Fig. 2 is shown.
  • the light exit element 5 is not adjusted alone with respect 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 Abstrahl Schemee B and the directional radiation over the first emission area A is maintained.
  • 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 in Fig. 2 shown lamp has a high maintenance factor, since the light exit element 5 still closes the lamp housing 2 to the front.
  • 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 directional light emission, these measures primarily relating to the attachment of a supplementary light influencing element 6 on the pane 50 of the light exit element.
  • a prism structure, a grid structure or a (micro) grid can optionally be used as light-influencing element 6.
  • a prism, grid or grid element was arranged more or less loosely on the upper side of the translucent plate 50 of the light exit element 5 is in the embodiment of Fig. 3a and 3b provided that this supplementary light influencing element 6 is now arranged on the underside of the disc 50.
  • 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.
  • 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.
  • 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 Fig. 3b is shown.
  • FIG Fig. 4 A further variant for the formation of the light exit element 5 according to the invention is shown in FIG Fig. 4 shown.
  • 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.
  • the light-influencing element 6 can be threaded into the recess 52 on the face side.
  • FIG. 5 A very similar solution is 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.
  • the light influencing element 6 is jammed with the light exit element 5.
  • 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.
  • FIGS. 7 and 8 Other variants are in the FIGS. 7 and 8 shown.
  • the recess 52 is designed to receive the light-influencing element 6 stepped in their edge regions, wherein in the example according to FIG 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.
  • a glass-clear disc or film is glued over the entire surface of the underside of the light influencing element 6, so that it is connected to the disc 50.
  • 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.
  • 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.
  • the 10 to 12 now show an alternative embodiment of a lamp according to the invention, in which there are further possibilities for adjustability of the light exit element, by which a brightening of the surrounding ceiling area is made possible.
  • the in Fig. 10 illustrated lamp 1 in a comparable manner as the lamp according to Fig. 1 So 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 closes the front of the housing 2.
  • 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 Abstrahl Scheme 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 Lichtabstrahl Schemee 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.
  • 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. Also the basis of the Fig. 3 to 8 variants described would be conceivable for the formation of a light exit element for the directed 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.
  • all the elements 20, 25 such that they are flush with the luminaire housing 2 and thus with the surrounding ceiling area.
  • the two lateral second sub-elements 25 could be arranged protruding.
  • light is emitted diffusely via the side walls 27 of the second partial elements 25, so that surrounding ceiling areas are brightened.
  • the preferred directional light emission to the underside takes place via the first subelement 20.
  • the area surrounding the first sub-element 20 is brightened over the lower sides 26 of the second sub-elements 25.
  • Fig. 11 Alternative to the configuration in Fig. 11 could also be provided that the first sub-element 20 is arranged above, while on the other hand, the second sub-elements 25 terminate flush with the lamp housing 2. Also at this in Fig. 12 The effect for 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.
  • a luminaire is created by the present invention, which on the one hand is easy to clean and accordingly has a high maintenance factor.
  • at least comparable positive photometric properties as in already known luminaires are achieved.
  • 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.

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  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

Die vorliegende Erfindung betrifft eine Leuchte gemäß dem Oberbegriff des Anspruchs 1, welche ein kastenförmiges Leuchtengehäuse zur Aufnahme mindestens einer länglichen Lichtquelle sowie mindestens eine - von dem zu beleuchtenden Bereich aus gesehen - neben der Lichtquelle angeordnete Reflektorfläche aufweist, wobei das Leuchtengehäuse eine Lichtaustrittsöffnung bildet, welche durch ein Lichtaustrittselement zur Lichtabgabe abgeschlossen ist.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.

Eine vergleichbare Leuchte ist aus der WO 01/59364 A1 der Anmelderin bekannt. Es handelt sich hierbei um eine Leuchte, welche zum einen Licht gerichtet, also innerhalb eines bestimmten Winkelbereichs abgibt, und bei der andererseits der zur gerichteten Lichtabgabe vorgesehene Bereich der Leuchte in seiner Umgebung zusätzlich aufgehellt wird. Hierzu weist die bekannte Leuchte neben der Lichtquelle, vor der in Abstrahlrichtung gesehen ein Raster angeordnet ist, zusätzliche Reflektorflügel auf, welche sich seitlich von der Lichtquelle erstrecken, sowie vor den Reflektorflügeln angeordnete Diffusoren. Die Reflektorflügel bilden mit dem jeweils davor angeordneten Diffusor seitlich neben der Lichtquelle bzw. dem Raster befindliche sog. Lichtkammern, in welche ein Teil des von der Lichtquelle abgegebenen Lichts eingestrahlt und dann über die Diffusoren abgegeben wird. Die Konfiguration der verschiedenen Elemente ist dabei derart gewählt, dass eine möglichst gleichmäßige Aufhellung des das Leuchtenraster umgebenden Bereichs erzielt wird. Gleichzeitig zeichnet sich die Leuchte durch ihre äußerst geringe Bauhöhe aus.A comparable light is from the WO 01/59364 A1 the applicant known. 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.

Die homogene Lichtabgabe über die zu beiden Seiten des Rasters befindlichen Diffusoren wird bei dieser bekannten Leuchte insbesondere auch durch eine besondere Gestaltung der Reflektoren sowie der Diffusoren erzielt. Beide Elemente sind bei der bekannten Leuchte konkav geformt, um eine verbesserte Lichtverteilung zu erzielen. Wird in diesem Fall die bekannte Leuchte als Deckeneinbauleuchte verwendet, so bedeutet dies, dass der Diffusor vom Rand des Gehäuses ausgehend nach innen in Richtung auf den Gehäusegrund hin verläuft. Dies wiederum hat zur Folge, dass insbesondere der Bereich um das zur gerichteten Lichtabgabe vorgesehene Leuchtenraster verschmutzungsanfällig ist. Ferner wird zwar der das Leuchtenraster umgebende Bereich aufgehellt, nicht jedoch der die Leuchte umgebende Deckenbereich. Trotz allem jedoch ist diese bekannte Leuchte aufgrund ihrer hervorragenden lichttechnischen Eigenschaften sehr erfolgreich.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.

Der vorliegenden Erfindung liegt nunmehr die Aufgabe zugrunde, das aus der WO 01/59364 A1 bekannte Leuchtenkonzept weiter zu entwickeln, so dass sich in den oben genannten Punkten zusätzliche Verbesserungen ergeben. Nach wie vor soll allerdings eine Leuchte geschaffen werden, welche hinsichtlich ihrer lichttechnischen Eigenschaften vergleichbar zu der bekannten Leuchte ist.The present invention is based on the object, which from the WO 01/59364 A1 develop further known lighting concept, so that there are additional improvements in the above-mentioned points. As before, however, a luminaire is to be created which is comparable in terms of its lighting properties to the known luminaire.

Eine Leuchte mit ähnlichen Lichtabstrahlungseigenschaften ist in der US 2,434,049 A beschrieben. Diese weist eine kuppelförmige Abdeckung aus Glasrippen auf, welche zur Entblendung dienen. Ferner sind an den Seiten der Kuppel zur Außenseite hin gerichtete Diffusoren vorgesehen, welche die seitliche Lichtabgabe beeinflussen. Aufgrund der rippenartigen Außenstrukturen und außen angeordneten Diffusoren ist diese Leuchte ebenfalls mit den vorbeschriebenen Nachteilen behaftet.A luminaire with similar light emission properties is in US 2,434,049 A described. This has a dome-shaped cover of glass ribs, which serve to glare. Furthermore, on the sides of the dome to the outside directed diffusers are provided, which influence the lateral light output. Due to the rib-like outer structures and externally arranged diffusers this lamp is also subject to the disadvantages described above.

Ferner zeigen die Schriften EP 1 279 899 A , GB 951,159 A , DE 100 18 499 A1 und EP 1 195 551 A2 Leuchten, die eine Lichtabstrahlung aufweisen, welche vom bevorzugten Konzept der WO 01/59364 A1 abweicht.Further, the writings show EP 1 279 899 A . GB 951,159 A . DE 100 18 499 A1 and EP 1 195 551 A2 Luminaires having a light emission, which of the preferred concept of WO 01/59364 A1 differs.

Die EP1 279 899 A beschreibt beispielsweise eine kastenförmige Leuchte mit einem transparenten, ebenen Lichtabstrahlelement, das ein Rasterelement an der Innenseite des Lichtabstrahlelements trägt, während die EP 1 195 551 A2 eine Leuchte zeigt mit einem Diffusorelement, das in eine Halterung an der Unterseite des Lichtaustrittselements einschiebbar ist. Eine ähnliche Lösung ist auch bei einem Lichtaustrittselement gemäß der US 4,891,737 A realisiert. Darüberhinaus offenbart die US 4,263,639 A Diffusorelemente, welche in verschiedenen Ebenen angeordnet sind.The EP1 279 899 A describes, for example, a box-shaped luminaire with a transparent, planar Lichtabstrahlelement carrying a grid element on the inside of the Lichtabstrahlelements, while the EP 1 195 551 A2 a luminaire shows with a diffuser element which can be inserted into a holder on the underside of the light exit element. A similar solution is also in a light exit element according to the US 4,891,737 A realized. In addition, the US 4,263,639 A Diffuser elements, which are arranged in different levels.

Weiterhin zeigt die GB 951,159 A eine Leuchte, die ein verstellbares Lichtaustrittselement, sowie einen gemeinsam mit dem Lichtaustrittselement verstellbaren Reflektor aufweist.Furthermore, the shows GB 951,159 A a luminaire, which has an adjustable light exit element, and a reflector which can be adjusted together with the light exit element.

Aus der US 2,398,507 ist eine Lichtabgabeanordnung bekannt, die von einer Decke abgehängte, lichtdurchlässige Platten mit prismatischen Oberflächen aufweist.From the US 2,398,507 For example, a light-emitting device is known which has translucent panels with prismatic surfaces suspended from a ceiling.

Die Aufgabe wird durch die in den unabhängigen Ansprüchen angegebene Erfindung gelöst. Vorteilhafte Weiterbildungen der vorliegenden Erfindung sind Gegenstand der Unteransprüche.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.

Ein erster Erfindungsgedanke beruht hierbei auf der Idee, durch besondere Maßnahmen bei der Ausgestaltung der Leuchte deren Wartungsfaktor zu verbessern. Dieser sog. Wartungsfaktor ist davon abhängig, wie oft eine Leuchte gewartet werden muss, wobei hierunter insbesondere auch das erforderliche Reinigen der Leuchte verstanden wird. Erfindungsgemäß wird nunmehr ein hoher Wartungsfaktor dadurch erzielt, dass die Lichtaustrittsöffnung des Leuchtengehäuses durch ein Lichtaustrittselement abgeschlossen ist, welches über seine Fläche hin gesehen eine unterschiedliche Lichtabstrahlcharakteristik aufweist. In einem im wesentlichen vor der Lichtquelle befindlichen ersten Abstrahlbereich weist das Lichtaustrittselement dementsprechend eine erste Lichtabstrahlcharakteristik auf, während hingegen das Lichtaustrittselement in einem von dem ersten Abstrahlbereich getrennten zweiten Abstrahlbereich eine gegenüber der ersten Lichtabstrahlcharakteristik unterschiedliche zweite Lichtabstrahlcharakteristik aufweist. Hierbei ist vorgesehen, dass über den ersten Lichtabstrahlbereich eine gerichtete Lichtabgabe erfolgt, während hingegen die Lichtabstrahlcharakteristik des zweiten Abstrahlbereichs derart ist, dass hier das Licht diffus abgegeben wird. Ferner ist erfindungsgemäß die Unterseite des Lichtaustrittselements eben gestaltet. Das Lichtaustrittselement weist im ersten Abstrahlbereich ein Lichtbeeinflussungselement auf, welches eine gerichtete Lichtabgabe bewirkt, wobei das Lichtaustrittselement eine Lichtaustrittsscheibe aufweist, welche im ersten Abstrahlbereich glasklar ist und wobei an der Ober- und/oder Unterseite des ersten Abstrahlbereichs das Lichtbeeinflussungselement angeordnet ist.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 is provided that a directed light emission takes place via the first light emission region, whereas the light emission characteristic of the second emission region is such that here the light is emitted diffusely. Furthermore, according to the invention, the underside of the light exit element is flat. The light exit element has, in the first emission area, a light influencing element which effects a directed light output, wherein the light exit element has a light exit disc which is crystal clear in the first emission area and the light influencing element is arranged on the top and / or bottom side of the first emission area.

Gemäß diesem ersten Erfindungsaspekt wird dementsprechend eine Leuchte mit einem kastenförmigen Leuchtengehäuse zur Aufnahme mindestens einer länglichen Lichtquelle sowie mindestens einer - von dem zu beleuchtenden Bereich aus gesehen - neben der Lichtquelle angeordneten Reflektorfläche vorgeschlagen, wobei das Leuchtengehäuse eine Lichtaustrittsöffnung bildet, welche durch ein Lichtaustrittselement abgeschlossen ist. Erfindungsgemäß weist das Lichtaustrittselement in einem im wesentlichen vor der Lichtquelle befindlichen ersten Abstrahlbereich eine erste Lichtabstrahlcharakteristik und in einem von dem ersten Abstrahlbereich getrennten zweiten Abstrahlbereich eine gegenüber der ersten Lichtabstrahlcharakteristik verschiedene zweite Lichtabstrahlcharakteristik auf.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.

Durch die Nutzung eines Lichtaustrittselements, welches das Licht in verschiedenen Bereichen in unterschiedlicher Art und Weise abgibt, kann gegenüber der bekannten Lösung der WO 01/59364 A1 der Wartungsfaktor der Leuchte verbessert werden, da der für die Lichtabgabe zuständige Bereich der Leuchte nicht mehr durch mehrere unterschiedliche Komponenten gebildet wird, welche in nebeneinander angeordneter Konfiguration nur schwer zu reinigen sind. Dabei kann der Wartungsfaktor der Leuchte insbesondere dann besonders optimiert werden, wenn erfindungsgemäß die Unterseite des Lichtaustrittelements im wesentlichen eben ist und in einer Weiterbildung in der Ebene der Lichtaustrittsöffnung des Gehäuses liegt. Letztendlich schließt in diesem Fall die Einbauleuchte bündig mit dem umgebenen Deckenbereich ab, was besondere Vorteile beim Reinigen der Leuchte mit sich bringt. Gleichzeitig kann allerdings wie bei der bekannten Leuchte ein Teil des Lichts gerichtet und der andere Teil des Lichts diffus abgegeben werden, so dass die erfindungsgemäße Leuchte vergleichbare lichttechnische Eigenschaften wie der Stand der Technik aufweist.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 A1 the maintenance factor of the lamp can be improved because the responsible for the light output range of the lamp is no longer formed by several different components, which are difficult to clean in juxtaposed configuration. In this case, the maintenance factor of the luminaire can be particularly optimized, in particular, according to the invention, when the underside of the light exit element is substantially planar and lies in a further development 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.

Die Einsatzmöglichkeiten der erfindungsgemäßen Leuchte können ferner gemäß einer anderen Weiterbildung der vorliegenden Erfindung dadurch verbessert werden, dass das Lichtaustrittselement in Lichtabstrahlrichtung verstellbar ist. In diesem Fall besteht insbesondere die Möglichkeit, das Lichtaustrittselement gegenüber dem Leuchtengehäuse leicht hervorstehen zu lassen. Hierdurch wird die Möglichkeit eröffnet, über Seitenwandbereiche des Lichtaustrittselements Licht auch seitlich abzugeben und damit den die Leuchte umgebenden Deckenbereich zusätzlich aufzuhellen. Dementsprechend werden auf diese Weise die lichttechnischen Eigenschaften der erfindungsgemäßen Leuchte weiter verbessert. Dabei kann insbesondere vorgesehen sein, dass das Lichtaustrittselement mit der Lichtquelle und dem Reflektor eine Einheit bildet, welche gemeinsam gegenüber dem Leuchtengehäuse verstellbar ist. Auf diese Weise ist sichergestellt, dass die Anordnung zwischen Lichtquelle(n), Reflektorfläche(en) und Lichtaustrittselement zueinander immer gleich bleibt.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 with the light source and the reflector forms a unit which is adjustable relative to the lamp housing together. 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.

Wie bereits erwähnt wurde, ist das bei der erfindungsgemäßen Leuchte zum Einsatz kommende Lichtaustrittselement vorzugsweise derart ausgestaltet, dass das über den ersten Abstrahlbereich des Lichtaustrittselements die Leuchte verlassende Licht lediglich in einem bestimmten Winkelbereich, also gerichtet abgestrahlt wird. Auf diese Weise wird eine blendfreie Ausleuchtung des unterhalb der Leuchte liegenden Raumes erzielt. Die erfindungsgemäße Leuchte eignet sich deshalb insbesondere auch zur Nutzung an Bildschirmarbeitsplätzen, an denen Reflektionen auf der Oberfläche eines Bildschirms oder dgl. vermieden werden sollen.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.

Diese besonderen optischen Eigenschaften des Lichtaustrittselements können bspw. dadurch erzielt werden, dass dieses im ersten Abstrahlbereich ein die Lichtabgabe in entsprechender Weise beeinflussendes Lichtbeeinflussungselement, insbesondere eine Prismen-, Gitter- oder Rasterstruktur aufweist. Hierzu kann vorgesehen sein, dass das Lichtaustrittselement durch eine - vorzugsweise einstückig ausgebildete - Lichtaustrittsscheibe gebildet ist, welche im ersten Abstrahlbereich im wesentlichen glasklar ist, wobei an der Ober- und/oder Unterseite der Lichtaustrittsscheibe ein Prismen-, Gitter- oder Rasterelement angeordnet ist. Dieses Lichtbeeinflussungselement kann einstückig mit der Lichtaustrittsscheibe verbunden sein, es besteht allerdings auch die Möglichkeit, dieses an der Oberseite oder Unterseite mit der Lichtaustrittsscheibe zu verkleben, zu verrasten oder anderweitig zu verbinden. Derartige Prismen-, Gitter- oder Rasterstrukturen sind bspw. aus der DE 103 15 268 A1 oder der DE 10 2004 039 676 A1 bekannt und werden nachfolgend noch näher erläutert. Der den ersten Abstrahlbereich umgebende zweite Abstrahlbereich kann dann bspw. derart behandelt sein, dass die bevorzugte diffuse Lichtabgabe erzielt wird.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 prism, grid or grid structures are, for example, from the DE 103 15 268 A1 or the DE 10 2004 039 676 A1 known 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.

Eine Aufhellung des die Leuchte umgebenden Deckenbereichs kann schließlich noch durch eine weitere Maßnahme erzielt werden, welche Gegenstand einer Weiterbildung der Erfindung ist. Dieser Gedanke beruht auf der Idee, das Lichtaustrittselement aus mehreren Teilelementen zu bilden, wobei ein erstes Teileelement im wesentlichen vor der Lichtquelle angeordnet und ein zweites Teileelement im wesentlichen vor der Reflektorfläche angeordnet ist, und wobei das erste und/oder das zweite Teilelement in Lichtabstrahlrichtung gesehen verstellbar sind. Bei dieser Variante besteht nunmehr die Möglichkeit, zumindest eines der beiden Teileelemente über das Leuchtegehäuse hervorstehen zu lassen, wobei dann über dessen Seitenwende wiederum Licht derart abgegeben wird, dass der umgebende Deckenbereich aufgehellt wird.A brightening of the ceiling area surrounding the lamp can finally be achieved by a further measure, which is the subject of a development 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 disposed substantially in front of the light source and a second part element is disposed 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 allow at least one of the two parts elements to protrude beyond the luminaire housing, in which case, in turn, light is emitted in such a way over its side turn that the surrounding ceiling area is brightened.

Gemäß dieser Weiterbildung wird also eine Leuchte mit einem kastenförmigen Leuchtengehäuse zur Aufnahme mindestens einer länglichen Lichtquelle sowie mindestens einem - von dem zu beleuchtenden Bereich aus gesehen - neben der Lichtquelle angeordneten Reflektorfläche vorgeschlagen, wobei das Leuchtengehäuse eine Lichtaustrittsöffnung bildet, welche durch ein Lichtaustrittselement abgeschlossen ist, und wobei erfindungsgemäß vorgesehen ist, dass das Lichtaustrittselement aus mehreren Teilelementen besteht, wobei ein erstes Teilelement im wesentlichen vor der Lichtquelle und ein zweites Teileelement im wesentlichen vor der Reflektorfläche angeordnet ist, und wobei das erste und/oder das zweite Teileelement in Lichtabstrahlrichtung gesehen verstellbar sind. Vorzugsweise weist das erste Teilelemente eine erste Lichtabstrahlcharakteristik und das zweite Teilelement eine gegenüber der ersten Lichtabstrahlcharakteristik verschiedene zweite Lichtabstrahlcharakteristik auf, so dass wiederum die Möglichkeit einer gerichteten Lichtabgabe sowie einer ergänzenden diffusen Beleuchtung ermöglicht wird.According to this development, therefore, a luminaire with a box-shaped luminaire housing for receiving at least one elongated 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 terminated by a light exit element. and wherein according to the invention it is provided that the light exit element consists of several 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 are seen in the light emission direction adjustable , 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, which in turn enables the possibility of directional light emission as well as complementary diffuse illumination.

Die - vorzugsweise konkave bzw. sich flügelartig erstreckende - Reflektorfläche kann gemäß einer ersten Variante durch einen eigenständigen Reflektor, also durch ein von dem Leuchtengehäuse getrenntes Bauteil gebildet werden. Es wäre in einer zweiten Variante allerdings auch denkbar, zumindest einen Teil der Reflektorfläche durch die Gehäuseinnenwand zu bilden.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.

Insgesamt wird also durch die vorliegende Erfindung ein neuartiges Leuchtenkonzept vorgeschlagen, welches zu einer einfach zu reinigenden Leuchte mit einem hohen Wartungsfaktor sowie besonders vorteilhaften lichttechnischen Eigenschaften führt.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.

Nachfolgend soll die Erfindung anhand der beiliegenden Zeichnungen näher erläutert werden. Es zeigen:

  • Fig. 1 eine Schnittdarstellung eines ersten Ausführungsbeispiels einer erfindungsgemäßen Leuchte;
  • Fig. 2 eine Variante der in Fig. 1 dargestellten Leuchte;
  • Fig. 3a und 3b verschiedene Stellungen eines erfindungsgemäßen Lichtaustrittselements;
  • Fig. 4 bis 9 verschiedene Varianten zur Realisierung eines unterschiedliche Lichtabstrahlcharakteristiken aufweisenden Lichtaustrittselements;
  • Fig. 10 ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Leuchte, bei welcher das Lichtaustrittselement durch mehrere Teilelemente gebildet ist; und
  • Fig. 11 und 12 die Leuchte gemäß Fig. 10, wobei die Teilelemente des Lichtaustrittselements unterschiedliche Stellungen einnehmen.
The invention will be explained in more detail with reference to the accompanying drawings. Show it:
  • Fig. 1 a sectional view of a first embodiment of a lamp according to the invention;
  • Fig. 2 a variant of in Fig. 1 illustrated light;
  • Fig. 3a and 3b different positions of a light exit element according to the invention;
  • Fig. 4 to 9 various variants for the realization of a light emission element having different light emission characteristics;
  • Fig. 10 a further embodiment of a lamp according to the invention, wherein the light exit element is formed by a plurality of sub-elements; and
  • FIGS. 11 and 12 the luminaire according to Fig. 10 , wherein the sub-elements of the light exit element occupy different positions.

Bei der in Fig. 1 dargestellten und allgemein mit dem Bezugszeichen 1 versehenen Deckeneinbauleuchte sind die verschiedenen Bauteile der Leuchte 1 innerhalb eines kastenförmigen Leuchtengehäuses 2 angeordnet, das beim Montieren der Leuchte 1 in der Decke des zu beleuchtenden Raumes versenkt wird. Das Leuchtengehäuse 2 weist hierzu an seinen Randbereichen seitlich vorstehende Randstreifen 2a auf, welche beim Einsetzen des Gehäuses 2 in eine Montageöffnung der Decke in Anlage gegen die Decke gelangen und die Montageöffnung vollständig abschließen. Diese Randstreifen 2a können ferner auch - nicht dargestellte - Halterungen aufweisen bzw. tragen, welche eine Anpassung an die Dicke der Decke ermöglichen und dementsprechend gewährleisten, dass das Leuchtengehäuse 2 grundsätzlich bündig mit der umgebenden Decke abschließt.At the in Fig. 1 illustrated 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.

Innerhalb des Gehäuses 2 sind zunächst zwei stabförmige Gasentladungslampen, insbesondere Leuchtstoffröhren 3 angeordnet, welche als Lichtquellen der Leuchte 1 dienen und sich mittig durch das Leuchtengehäuse 2 erstrecken. Selbstverständlich könnte die Anzahl und Art der Lichtquellen auch variiert werden. Das Licht dieser Gasentladungslampen 3 wird über die an der Vorder- bzw. Unterseite des Gehäuses 2 gebildete Lichtaustrittsöffnung abgegeben, wobei die Lichtabgabe über ein nachher noch näher beschriebenes Lichtaustrittselement erfolgt, welches mit dem Bezugszeichen 5 versehen ist. Um sicher zu stellen, dass das von den Gasentladungslampen 3 abgegebene Licht vollständig und effektiv zur Beleuchtung genutzt wird, sind ferner zwei flügelartig ausgebildete Reflektoren 4 vorgesehen, welche sich zu beiden Seiten der Lichtquellen 3 zum Randbereich des Gehäuses 2 hin erstrecken. Die Reflektoren 4 sind dabei insbesondere konkav ausgebildet, vorzugsweise konkav gekrümmt, da durch diese besondere Form eine sehr gleichmäßige Lichtabgabe ermöglicht wird. Alternativ zu der dargestellten Ausführungsform könnte auch ein einzelner, die Lichtquellen 3 vollständig überspannender und sich zu beiden Gehäuseseiten hin erstreckender Reflektor eingesetzt werden.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.

Ferner ist anzumerken, dass alternativ zu den dargestellten Ausführungsbeispielen, bei denen die Reflektoren durch eigenständige bzw. vom Gehäuse 2 getrennte Bauteile gebildet sind, es auch denkbar wäre, zumindest teilweise die Innenwand des Leuchtengehäuses 2 als Reflektorfläche zu nutzen. Um auch in diesem Fall die bevorzugte konkav geformte Reflektorfläche zu erzielen, kann das Gehäuse beispielsweise in seinen Eckbereichen abgewinkelt sein bzw. entsprechende Einsätze aufweisen, um letztendlich eine durch mehrere Teilflächen gebildet konkave Form zu bilden.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 can be angled, for example, in its corner regions or have corresponding inserts to ultimately form a concave shape formed by a plurality of partial surfaces.

Generell soll die in Fig. 1 dargestellte erfindungsgemäße Leuchte 1 vergleichbare lichttechnische Eigenschaften aufweisen wie die aus der WO 01/59364 A1 bekannte Leuchte. Es soll also zum einen Licht gerichtet, also in bestimmten Winkelbereichen abgegeben werden. Zum anderen soll über eine größere Fläche hinweg Licht ungerichtet bzw. diffus abgegeben werden. Während dies bei der bekannten Leuchte durch die Nutzung nebeneinander angeordneter Diffusoren und Leuchtenraster erzielt wird, erfolgt diese Art der Lichtabgabe bei der erfindungsgemäßen Leuchte durch eine besondere Ausgestaltung des Lichtaustrittselements 5, das nunmehr näher erläutert werden soll.Generally, the in Fig. 1 illustrated lamp 1 according to the invention have comparable photometric properties as that of the WO 01/59364 A1 known light. 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.

Eine Besonderheit des erfindungsgemäßen Lichtaustrittselements 5 besteht darin, dass sich dieses über die gesamte Lichtaustrittsöffnung des Leuchtengehäuses 2 erstreckt und dieses dementsprechend vollständig abschließt. Dabei kann entsprechend der Darstellung in Fig. 1 insbesondere vorgesehen sein, dass das Lichtaustrittselement 5 eben ausgebildet und derart angeordnet ist, dass es bündig mit der Unterseite des Gehäuses 2 und dementsprechend mit der umgebenden Decke, an der die Leuchte 1 montiert ist, abschließt. In diesem Fall wird ein besonders einfaches Reinigen der Leuchte 1 ermöglicht.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 be provided in particular that the light exit element 5 is flat and arranged such that it is flush with the bottom of the housing 2 and accordingly with the surrounding ceiling to which the lamp 1 is mounted, completes. In this case, a particularly simple cleaning of the lamp 1 is made possible.

Trotz dieser besonderen Ausgestaltung des Lichtaustrittselements 5 ist nunmehr allerdings gewährleistet, dass Licht in der zuvor beschriebenen Weise abgegeben wird.Despite this particular embodiment of the light exit element 5, however, it is now ensured that light is emitted in the manner described above.

Das Lichtaustrittselement 5 ist nämlich derart ausgestaltet, dass dieses in unterschiedlichen Bereichen unterschiedliche Lichtabstrahlcharakteristiken aufweist.Namely, the light exit element 5 is designed such that it has different light emission characteristics in different areas.

So wird zunächst in einem ersten Abstrahlbereich A, der im wesentlichen unterhalb der beiden Leuchtstofflampen 3 gebildet ist, Licht gerichtet abgestrahlt. Über diesen Austrittsbereich A abgegebenes Licht verlässt also das Lichtaustrittselement 5 derart, dass die Lichtstrahlen einen vorgegebenen maximalen Austrittswinkel gegenüber dem Lot auf die Oberfläche des Lichtaustrittselements 5 nicht überschreiten. Typischerweise liegt dieser maximale Lichtaustrittswinkel in einem Bereich von etwa 60°, wodurch erreicht wird, dass das auf diese Weise abgegebene Licht blendfrei ist. Eine die erfindungsgemäße Leuchte 1 betrachtende Person wird also nicht geblendet. Ferner werden Reflektionen an senkrecht stehenden Oberflächen, insbesondere Bildschirmen und dgl. weitestgehend vermieden.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 such 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 exit angle is in a range of about 60 °, which ensures 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.

Neben diesem ersten Abstrahlbereich A, über den eine gerichtete Lichtabgabe erfolgt, werden zu beiden Seiten davon zweite Abstrahlbereiche B gebildet, über welche Licht ungerichtet, also diffus abgegeben wird. Ebenso wie bei der bekannten Leuchte wird also der zur direkten Lichtabgabe vorgesehene erste Abstrahlbereich A in seiner Umgebung aufgehellt, was aus lichttechnischer Sicht besondere Vorteil mit sich bringt. Für eine die Leuchte betrachtende Person ist nämlich aufgrund der Lichtabgabe über den ersten Abstrahlbereich A nicht immer erkennbar, ob die Leuchte in Betrieb ist oder nicht, was oftmals als unangenehm empfunden wird. Die zusätzliche, diffuse Lichtabgabe in alle Richtungen über die zweiten Abstrahlbereiche B allerdings vermeidet diese Problematik. Beim Betrachten der Leuchte 1 ist also ohne weiteres und unmittelbar erkennbar, ob diese eingeschaltet ist oder nicht.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.

Der obigen Erläuterung kann also entnommen werden, dass das Lichtaustrittselement 5 in verschiedenen Bereich unterschiedlichste lichttechnische Eigenschaften aufweist. Im ersten Abstrahlbereich A erfolgt eine gerichtete Lichtabgabe, während das Lichtaustrittselement 5 in den zweiten Abstrahlbereichen B als Diffusor wirkt. Da im dargestellten Ausführungsbeispiel das Lichtaustrittselement 5 eine sich über die gesamte Öffnung des Gehäuses 2 erstreckende Fläche bildet, müssen also besondere Maßnahme getroffen werden, durch welche diese unterschiedlichen Lichtabstrahlcharakteristiken erzielt werden. Hierfür bestehen unterschiedliche Möglichkeiten, welche nachfolgend noch näher erläutert werden.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.

Bei dem in Fig. 1 dargestellten Ausführungsbeispiels ist beispielsweise vorgesehen, dass das Lichtaustrittselement 5 durch eine lichtdurchlässige Scheibe 50 - beispielsweise aus PMMA - gebildet ist, welche im ersten Lichtabstrahlbereich A glasklar ausgebildet ist. Lichtstrahlen, welche die Scheibe 50 in diesem ersten Lichtabstrahlbereich A verlassen, werden also durch diese wenig bzw. gar nicht beeinflusst. Um trotz allem eine gerichtete Lichtabgabe zu erzielen, ist nunmehr vorgesehen, dass im ersten Abstrahlbereich A an der Oberseite der Scheibe 50 ein ergänzendes Lichtbeeinflussungselement 6 angeordnet ist, welches die entsprechende Lichtlenkung bewirkt. Bei diesem ergänzenden Lichtbeeinflussungselement 6 kann es sich bspw. um eine Mikroprismenstruktur, ein Rasterelement oder ein Gitterelement handeln. Derartige Elemente sind aus dem Stand der Technik, bspw. der DE 103 15 268 A1 und DE 10 2004 039 676 A1 bekannt und weisen mehrere parallel zueinander angeordnete Prismen, Gitter- oder Lamellenteile auf, welche derart gestaltet sind, dass sie das Licht in einer Richtung gesehen derart ablenken bzw. reflektieren, dass dieses lediglich in bestimmten Winkelbereichen abgegeben wird. Derartige Prismen-, Gitter- oder Rasterelemente können mit Bauhöhen von lediglich wenigen Millimetern realisiert werden, so dass sie ohne weiteres bei der erfindungsgemäßen Leuchte 1 eingesetzt werden können.At the in Fig. 1 For example, it is provided that the light exit element 5 is formed by a translucent disk 50, for example of PMMA, which projects in the first light emission area 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. The DE 103 15 268 A1 and DE 10 2004 039 676 A1 are known and have a plurality of mutually parallel prisms, lattice or lamella parts, which are designed such that they deflect the light seen in one direction or reflect that this is emitted 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.

Die Anordnung dieses ergänzenden Lichtbeeinflussungselement 6 erfolgt nun im dargestellten Beispiel dadurch, dass an der Oberseite des Lichtaustrittselements 5 zwei parallel zu den Lichtquellen 3 verlaufende Stege 51 vorgesehen sind, welche einen Aufnahmebereich definieren, in den das ergänzende Lichtbeeinflussungselement 6 einfach eingelegt wird. Eine zusätzliche Befestigung ist bei dieser Variante nicht zwingend erforderlich, kann aber selbstverständlich vorgesehen sein.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.

Durch die Verwendung des Lichtbeeinflussungselements 6 wird also erreicht, dass über den ersten Lichtabstrahlbereich A abgegebenes Licht in besonderer Weise gerichtet bzw. gebündelt wird. Die die zweiten Lichtabstrahlbereiche B bildenden Bereiche der Scheibe 50 sind hingegen derart behandelt, dass durch sie hindurchtretendes Licht gestreut und dementsprechend diffus abgegeben wird. Dies kann durch eine entsprechende Behandlung der Oberfläche der Scheibe 50 erzielt werden, alternativ hierzu könnte in diesen Bereichen dem Material allerdings auch Streukörper beigefügt werden, welche die gewünschte diffuse Lichtabgabe begünstigen. Hierdurch wird die gewünschte zweite, von der Abstrahlcharakterisitk des ersten Abstrahlbereichs A verschiedene Abstrahlcharakteristik erzielt.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.

Auch bei der erfindungsgemäßen Leuchte 1 ist gewünscht, dass das über die zweiten Lichtabstrahlbereiche B abgegebene Licht eine möglichst gleichmäßige Leuchtstärke aufweist. Dementsprechend werden wiederum durch die Reflektoren 4 und das davor angeordnete Lichtaustrittselement 5 zwei seitlich von den Lichtquellen 3 befindliche sog. Lichtkammern 10 gebildet, in welche ein Teil des von den Lichtquellen 3 abgegebenen Lichts eingestrahlt und durch den Reflektor 4 derart auf das Lichtaustrittselement 5 reflektiert wird, dass eine möglichst homogene Lichtabgabe erzielt wird. Das Konzept derartiger sog. Lichtkammern ist bereits aus der zuvor erwähnten WO 01/59364 A1 bekannt.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 from the aforementioned WO 01/59364 A1 known.

Insgesamt gesehen wird somit eine Leuchte gebildet, welche hinsichtlich ihrer lichttechnischen Eigenschaften vergleichbar zu der eingangs besprochenen bekannten Leuchte ist. Ein Vorteil gegenüber der bekannten Leuchte besteht allerdings in dem höheren Wartungsfaktor, da ein Reinigen der in Fig. 1 dargestellten Leuchte aufgrund der geschlossenen und bündigen Unterseite deutlich einfacher durchzuführen ist.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 in Fig. 1 shown light due to the closed and flush bottom is much easier to perform.

Fig. 2 zeigt nunmehr eine Variante bzw. Weiterbildung der Leuchte gemäß Fig. 1. Die Weiterbildung besteht darin, dass nunmehr das Lichtaustrittselement 5 gegenüber dem Leuchtengehäuse 2 in Lichtabstrahlrichtung verstellbar ist. Insbesondere besteht nunmehr die Möglichkeit, dass Lichtaustrittselement 5 derart anzuordnen, dass dieses leicht gegenüber dem Leuchtengehäuse 2 hervorsteht, wie dies in Fig. 2 gezeigt ist. Fig. 2 now shows a variant or development of the lamp according to Fig. 1 , The development consists in that now the light exit element 5 relative to the lamp housing 2 in the light emission direction is adjustable. 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 Fig. 2 is shown.

Bei dieser Konfiguration wird zunächst über die ersten und zweiten Abstrahlbereiche A und B Licht in der zuvor beschriebenen Weise abgegeben. Aufgrund der vortretenden Anordnung des Lichtaustrittselements 5 erfolgt nunmehr allerdings auch noch eine zusätzliche Lichtabgabe über Seitenwände 50a des Lichtaustrittselements 5, was in Fig. 2 durch die Pfeile angedeutet ist. Auch die Seitenwände 50a des Lichtaustrittselements 5 sind bevorzugt derart ausgestaltet, dass sie Licht streuen bzw. diffus abgeben, weshalb über diese Seitenwände 50a austretendes Licht in verschiedenste Richtungen abgegeben wird. Insbesondere werden allerdings auch die die Leuchte 1 umgebenden Deckenbereiche 100 aufgehellt. Hierdurch ergeben sich besonders vorteilhafte lichttechnische Eigenschaften, da letztendlich ausgehend von dem ersten Lichtabstrahlbereich A, über den die gerichtete Lichtabgabe erfolgt, und die zweiten Lichtabstrahlbereiche B, über welche diffus Licht abgestrahlt wird, ein kontinuierlicher Übergang auf die umgebenden Deckenbereiche 100 erzielt wird. Die Helligkeit nimmt dann nach außen hin immer weiter ab.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, however, now also takes place an additional light output via side walls 50a of the light exit element 5, which in Fig. 2 indicated 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.

Anzumerken ist, dass im Ausführungsbeispiel gemäß Fig. 2 das Lichtaustrittselement 5 nicht allein gegenüber dem Leuchtengehäuse 2 verstellt wird. Stattdessen bilden die Lichtquellen 3, die Reflektoren 4 und das Lichtaustrittselement 5 eine Baueinheit, welche in ihrer Gesamtheit gegenüber dem Gehäuse 2 verstellt wird. Der Vorteil bei dieser Variante besteht darin, dass die Anordnung der Lichtquellen 3, der Reflektoren 4 und des Lichtaustrittselements 5 zueinander nicht verändert wird, so dass nach wie vor die homogene Lichtabgabe über die Lichtkammern 10 und die zweiten Abstrahlbereiche B sowie die gerichtete Abstrahlung über den ersten Abstrahlbereich A beibehalten wird. Selbstverständlich wäre es allerdings auch denkbar, das Lichtaustrittselement 5 allein zu verstellen. Hierfür wären unterschiedlichste Möglichkeiten zur Realisierung der Verstellbarkeit denkbar, wobei bspw. ein entsprechendes Verrasten mit den Seitenwänden des Gehäuses 2 oder ein entsprechendes Anschrauben durch die Nutzung von Langlöchern oder mehreren Schraubbohrungen denkbar wäre. Auch die in Fig. 2 dargestellte Leuchte weist einen hohen Wartungsfaktor auf, da das Lichtaustrittselement 5 nach wie vor das Leuchtengehäuse 2 zur Vorderseite hin abschließt.It should be noted that in the embodiment according to Fig. 2 the light exit element 5 is not adjusted alone with respect 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 in Fig. 2 shown lamp has a high maintenance factor, since the light exit element 5 still closes the lamp housing 2 to the front.

Nachfolgend sollen weitere Möglichkeiten zur Realisierung des erfindungsgemäßen Lichtaustrittselements 5 erläutert werden. Bei allen der nachfolgend beschriebenen Varianten ist vorgesehen, dass mittig ein erster Bereich gebildet ist, über den eine Lichtabgabe gerichtet erfolgt, während hingegen seitlich hiervon eine diffuse Lichtabgabe erzielt wird. Die verschiedenen Varianten beziehen sich dabei insbesondere auf unterschiedliche Maßnahmen zur Bildung des mittleren Bereichs für die gerichtete Lichtabgabe, wobei sich diese Maßnahmen primär auf das Befestigen eines ergänzenden Lichtbeeinflussungselements 6 an der Scheibe 50 des Lichtaustrittselements beziehen. Grundsätzlich kann allerdings als Lichtbeeinflussungselement 6 wahlweise eine Prismenstruktur, eine Gitterstruktur oder ein (Mikro-)Raster verwendet werden.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 directional light emission, these measures primarily relating to the attachment of a supplementary light influencing element 6 on the pane 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.

Während bei dem Ausführungsbeispiel gemäß den Fig. 1 und 2 vorgesehen war, dass ein Prismen-, Gitter- oder Rasterelement mehr oder weniger lose an der Oberseite der lichtdurchlässigen Scheibe 50 des Lichtaustrittselements 5 angeordnet war, ist bei dem Ausführungsbeispiel der Fig. 3a und 3b vorgesehen, dass dieses ergänzende Lichtbeeinflussungselement 6 nunmehr an der Unterseite der Scheibe 50 angeordnet ist. Hierzu weist die Scheibe 50 eine Vertiefung bzw. Ausnehmung 52 auf, in welche das ergänzende Lichtbeeinflussungselement 6 eingelegt wird. Ein Befestigen des Lichtbeeinflussungselements 6 kann dann bspw. mittels Verkleben oder durch eine zwei Komponenten-Spritztechnik erfolgen. Wiederum ist allerdings vorgesehen, dass die Scheibe 50 des Lichtaustrittselements 5 im Bereich des ergänzenden Lichtbeeinflussungselements 6 glasklar ausgestaltet ist, während hingegen die umgebenden Bereiche und die Seitenwände 50a lichtstreuend sind und dementsprechend als Diffusor wirken. Für den Fall, dass das Lichtaustrittselement 5 gegenüber der Gehäuseöffnung vorstehend angeordnet ist, wird also wiederum eine seitliche Lichtabgabe erzielt, wie dies schematisch in Fig. 3b dargestellt ist.While in the embodiment according to the Fig. 1 and 2 was provided that a prism, grid or grid element was arranged more or less loosely on the upper side of the translucent plate 50 of the light exit element 5 is in the embodiment of Fig. 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 Fig. 3b is shown.

Eine weitere Variante zur Bildung des erfindungsgemäßen Lichtaustrittselement 5 ist in Fig. 4 dargestellt. Wiederum ist das ergänzende Lichtbeeinflussungselement 6 an der Unterseite der Scheibe 50 angeordnet, wobei die Scheibe 50 nunmehr eine Ausnehmung 52 aufweist, welche seitliche Nuten oder Rillen 53 bildet. In diese Rillen 53 greifen seitlich hervorstehende Stege 60 des Lichtbeeinflussungselements 6 ein, so dass dieses ohne zusätzliches Verkleben in der Ausnehmung 52 gehalten wird. Zur Montage kann hierbei das Lichtbeeinflussungselement 6 stirnseitig in die Ausnehmung 52 eingefädelt werden.A further variant for the formation of the light exit element 5 according to the invention is shown in FIG Fig. 4 shown. 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.

Eine sehr ähnliche Lösung ist in Fig. 5 dargestellt, bei welcher das Lichtbeeinflussungselement 6 an seinen Seiten schräge Schnittkanten 61 aufweist. Durch diese wird ein Einklemmen des Lichtbeeinflussungselements 6 in die Ausnehmung 52 des Lichtaustrittselements 5 ermöglicht.A very similar solution is 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.

Auch bei dem in Fig. 6 dargestellten Ausführungsbeispiel wird das Lichtbeeinflussungselement 6 mit dem Lichtaustrittselement 5 verklemmt. Hierzu ist die Ausnehmung 52 nun allerdings etwas tiefer ausgestaltet, wobei seitliche Arme 62 des Lichtbeeinflussungselements 6 eine gewisse Flexibilität aufweisen und mit dem Lichtaustrittselement 5 verklemmt werden, so dass das Beeinflussungselement 6 einfach in das Lichtaustrittselement 5 eingeschnappt werden kann.Also at the in Fig. 6 illustrated embodiment, 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.

Weitere Varianten sind in den Fig. 7 und 8 dargestellt. In beiden Fällen ist die Ausnehmung 52 zur Aufnahme des Lichtbeeinflussungselement 6 in ihren Randbereichen abgestuft ausgestaltet, wobei bei dem Beispiel gemäß Fig. 7 ein lichtdichter Streifen 63 teilweise mit der Scheibe 50 sowie dem Lichtbeeinflussungselement 6 verklebt wird. Hierdurch wird zusätzlich auch eine optische Abtrennung von dem ersten Abstrahlbereich A zur gerichteten Lichtabgabe und dem zweiten Abstrahlbereich B zur diffusen Lichtabgabe erzielt. Bei der Variante gemäß Fig. 8 wird vollflächig eine glasklare Scheibe oder Folie auf die Unterseite des Lichtbeeinflussungselements 6 aufgeklebt, so dass dieses mit der Scheibe 50 verbunden wird.Other variants are in the FIGS. 7 and 8 shown. In both cases, the recess 52 is designed to receive the light-influencing element 6 stepped in their edge regions, wherein in the example according to FIG 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 disc or film is glued over the entire surface of the underside of the light influencing element 6, so that it is connected to the disc 50.

Alle beschriebenen Varianten zeichnen sich dadurch aus, dass eine im wesentlichen plane Oberfläche für das Lichtaustrittselement 5 gebildet wird, was ein einfaches Reinigen der Leuchte ermöglicht. Ferner kann in allen Fällen eine Verstellbarkeit des Lichtaustrittselements 5 gegenüber dem Leuchtengehäuse 2 erzielt werden, da seitlich nach oben vorstehende Seitenwände 50a vorgesehen sind.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, an adjustability of the light exit element 5 with respect to the luminaire housing 2 can be achieved in all cases, since laterally upwardly projecting side walls 50a are provided.

Bei der Variante gemäß Fig. 9 hingegen ist eine Verstellbarkeit des Lichtbeeinflussungselements 5 nicht möglich. Bei diesem Ausführungsbeispiel ist das Lichtaustrittselement durch eine Sandwich-Struktur gebildet, welche an Ihrer Unterseite eine glasklare Scheibe, bspw. aus PMMA, und an ihrer Oberseite eine diffus streuende Folie 56 aufweist. Zwischen beiden Elementen 55 und 56 sind einerseits eine Diffusorscheibe 57 sowie andererseits ein Lichtbeeinflussungselement 6 angeordnet. Diese Sandwich-Struktur wird an ihren Stirnseiten durch Klammern 58 zusammengehalten, so dass sich ein besonders einfacher Aufbau für das Lichtaustrittselement 5 ergibt.In the variant according to Fig. 9 however, 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.

Bei allen zuvor beschriebenen Ausführungsbeispielen wurde das Lichtaustrittselement 5 durch ein Element gebildet, welches als einzelnes Bauteil das Leuchtengehäuse zur Vorderseite hin vollständig abschloss und - sofern vorgesehen - gegenüber dem Gehäuse verstellt werden konnte. Die Fig. 10 bis 12 zeigen nunmehr eine alternative Ausführungsform einer erfindungsgemäßen Leuchte, bei der weitere Möglichkeiten zur Verstellbarkeit des Lichtaustrittselements bestehen, durch welche eine Aufhellung des umgebenden Deckenbereichs ermöglicht ist.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. The 10 to 12 now show an alternative embodiment of a lamp according to the invention, in which there are further possibilities for adjustability of the light exit element, by which a brightening of the surrounding ceiling area is made possible.

Zunächst ist die in Fig. 10 dargestellte Leuchte 1 in vergleichbarer Weise wie die Leuchte gemäß Fig. 1 aufgebaut, sie besteht also aus einem kastenförmigen Leuchtengehäuse 2, einer oder mehreren stabförmigen Lichtquellen 3, flügelartigen Reflektoren 4 sowie einem Lichtaustrittselement 5, welches die Vorderseite des Gehäuses 2 verschließt. Ein Unterschied besteht nunmehr allerdings darin, dass das Lichtaustrittselement 5 durch mehrere Teilelemente gebildet ist, welche jeweils in bestimmter Weise eine Lichtabgabe hervorrufen und - wie später noch näher erläutert wird - in Lichtabstrahlrichtung verstellbar sind. Ein erstes Teilelement ist dabei mit dem Bezugszeichen 20 versehen und bildet den für die gerichtete Abstrahlung vorgesehenen ersten Abstrahlbereich A. Dementsprechend befindet sich das Teilelement 20 unterhalb der Lichtquellen 3. Weitere zweite Teilelemente 25 sind zu beiden Seiten des ersten Teilelements 20 angeordnet und bilden jeweils die zweiten Lichtabstrahlbereiche B, über welche eine diffuse Lichtabgabe erfolgt. Alle drei nebeneinander angeordneten Teilelemente 20 und 25 bilden in ihrer Gesamtheit das Lichtaustrittselement 5, welches das Leuchtengehäuse 2 zur Vorderseite hin abschließt.First, the in Fig. 10 illustrated lamp 1 in a comparable manner as the lamp according to Fig. 1 So 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 closes the front of the housing 2. 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.

Das erste Teilelement 20 weist eine untere Lichtaustrittsfläche 21 sowie Seitenwände 22 auf. Die Lichtaustrittsfläche 21 ist dabei derart gestaltet, dass durch sie hindurch tretendes Licht gerichtet abgegeben wird. Dementsprechend können wiederum die zuvor beschriebenen Maßnahmen zum Erzielen einer gerichteten Lichtabgabe genutzt werden. Insbesondere könnte - wie dargestellt - zwischen die Seitenwände 22 ein Mikroraster, ein Gitter- oder Prismenelement als Lichtbeeinflussungselement 6 eingelegt werden. Die Lichtaustrittsfläche 21 ist in diesem Fall wiederum vorzugsweise glasklar ausgestaltet. Auch die anhand der Fig. 3 bis 8 beschriebenen Varianten wären zur Bildung eines Lichtaustrittselements zur gerichteten Lichtabgabe denkbar. Die Seitenwände 22 des ersten Teilelements 20 hingegen sind vorzugsweise diffus abstrahlend ausgestaltet, da über diese Seitenwände abgegebenes Licht möglichst in verschiedenste Richtungen gestreut werden sollte.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. Also the basis of the Fig. 3 to 8 variants described would be conceivable for the formation of a light exit element for the directed 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.

Die zweiten Teilelemente 25 sind ebenso wie das erste Teilelement 20 topfartig ausgestaltet, weisen also eine untere Lichtaustrittsfläche 26 sowie Seitenwände 27 auf. Da die zweiten Teilelemente 25 die zweite Abstrahlfläche B definieren, ist nunmehr allerdings vorgesehen, dass sämtliche Wände der zweiten Teilelemente 25 lichtstreuend ausgebildet sind, so dass diese Elemente also vollständig als Diffusoren wirken.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.

Eine Besonderheit dieser Leuchte 1 besteht nunmehr darin, dass zumindest eines der beiden Teilelemente 20, 25, vorzugsweise beide in Lichtabstrahlrichtung verstellbar sind. So besteht zunächst die Möglichkeit, alle Elemente 20, 25 derart anzuordnen, dass sie bündig mit dem Leuchtengehäuse 2 und damit mit dem umgebenden Deckenbereich abschließen. Wie in Fig. 11 gezeigt ist, könnten allerdings auch die beiden seitlichen zweiten Teilelemente 25 überstehend angeordnet werden. Wie auch bei dem Ausführungsbeispiel gemäß Fig. 2 wird hierdurch erzielt, dass über die Seitenwände 27 der zweiten Teilelemente 25 Licht diffus abgestrahlt wird, so dass umgebende Deckenbereiche aufgehellt werden. Nach wie vor erfolgt allerdings über das erste Teilelement 20 die bevorzugte gerichtete Lichtabgabe zur Unterseite hin. Ferner werden die das erste Teilelement 20 umgebenden Bereich über die Unterseiten 26 der zweiten Teilelemente 25 aufgehellt.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 in Fig. 11 is shown, however, the two lateral second sub-elements 25 could be arranged protruding. As in the embodiment according to Fig. 2 As a result, light is emitted diffusely via the side walls 27 of the second partial 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.

Alternativ zu der Konfiguration in Fig. 11 könnte ferner auch vorgesehen sein, dass das erste Teilelement 20 vorstehend angeordnet ist, während hingegen die zweiten Teilelemente 25 bündig mit dem Leuchtengehäuse 2 abschließen. Auch bei dieser in Fig. 12 dargestellten Variante erfolgt eine seitliche diffuse Lichtabgabe über die Seitenwände 22 des ersten Teilelements 20. Der Effekt zur Aufhellung umgebender Deckenbereiche ist hierbei allerdings deutlich geringer, da diese Seitenwände 22 weiter entfernt von den Randbereichen des Leuchtengehäuses angeordnet sind. Trotz allem werden auch in dieser Variante positive lichttechnische Eigenschaften erzielt.Alternative to the configuration in Fig. 11 could also be provided that the first sub-element 20 is arranged above, while on the other hand, the second sub-elements 25 terminate flush with the lamp housing 2. Also at this in Fig. 12 The effect for 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.

Die Möglichkeit zur Verstellung der Teilelemente in Lichtabstrahlrichtung kann wiederum dadurch eröffnet werden, dass diese in geeigneter Weise mit den Seitenwänden des Leuchtengehäuses 2 verrastbar sind. Auch ein entsprechendes Anschrauben in gewünschter Position kann vorgesehen sein.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.

Zusammenfassend wird also durch die vorliegende Erfindung eine Leuchte geschaffen, welche einerseits einfach zu reinigen ist und dementsprechend einen hohen Wartungsfaktor aufweist. Andererseits werden zumindest vergleichbare positive lichttechnische Eigenschaften wie bei bereits bekannten Leuchten erzielt. Wird ferner eine Konfiguration gewählt, in welcher das Lichtaustrittselement bzw. Teile davon gegenüber dem Leuchtengehäuse hervorstehen, kann zusätzlich auch der die Leuchte umgebende Deckenbereich aufgehellt werden. Die lichttechnischen Eigenschaften der erfindungsgemäßen Leuchte werden hierdurch sogar zusätzlich verbessert.In summary, therefore, a luminaire is created by the present invention, which on the one hand is easy to clean and accordingly has a high maintenance factor. 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 (13)

  1. A lamp (1) with a box-like lamp housing (2) for accommodating at least one light source (3) as well as at least one reflector surface (4) arranged next to the light source (3) - seen from the region to be illuminated -,
    wherein the lamp housing (2) forms a light outlet opening, which is closed by a light outlet element (5),
    wherein the light outlet element (5) has a first light emission characteristic in an emission region (A) located 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), wherein the lower side of the light outlet element (5) is flat,
    characterized in
    that the light leaving the lamp (1) via the first emission region (A) is only emitted in a specific angle range,
    wherein the light leaving the lamp (1) via the second emission region (B) is dispersed diffusely,
    wherein the light outlet element (5) has a light influence element (6) in the first emission region (A), which causes a directed light output,
    wherein the light outlet element (5) has a light outlet disc (50), which is clear as glass in the first emission region (A),
    wherein the light influence element (6) is arranged on the upper- and/or lower side of the first emission region (A).
  2. A lamp according to Claim 1,
    characterized in
    that the light influence element (6) has a prism-, lattice- or raster structure.
  3. A lamp according to Claim 1 or 2,
    characterized in
    that the light influence element (6) is connected in one piece with the light outlet disc (50).
  4. A lamp according to Claim 3,
    characterized in
    that the light influence element (6) is latched with the light outlet disc (50) or rests on the upper side of the light outlet disc (50).
  5. A lamp according to one of the preceding claims,
    characterized in
    that the light outlet element (5) lies in the plane of the light outlet opening of the lamp housing (2).
  6. A lamp according to any one of Claims 1 to 4,
    characterized in
    that the light outlet element (5) is adjustable in the light emission direction.
  7. A lamp according to any one of Claims 1 to 4,
    characterized in
    that the light outlet element (5) consists of several sub-elements (20, 25),
    wherein a first sub-element (20) is arranged essentially in front of the light source (3) and a second sub-element (25) is arranged essentially in front of the reflector surface (4) and
    wherein the first and/or the second sub-element (20, 25) is adjustable in the light emission direction.
  8. A lamp according to Claim 7,
    characterized in
    that the first sub-element (20) forms the first emission region (A) and the second sub-element (25) forms the second emission region (B).
  9. A lamp according to Claim 7,
    characterized in
    that both sub-elements (20, 25) have side walls (22, 27) directed in the edge region towards the housing (2), which act in a light-diffusing manner.
  10. A lamp according to any one of the preceding claims,
    characterized in
    that the reflector surface (4) is designed wing-like.
  11. A lamp according to one of the preceding claims,
    characterized in
    that the reflector surface (4) is formed at least partially by an inner wall of the lamp housing (2).
  12. A lamp according to any one of Claims 1 to 10,
    characterized in
    that the reflector surface (4) is formed by an independent reflector.
  13. A lamp according to one of the preceding claims,
    characterized in
    that this is designed symmetrically and a reflector surface (4) extends to both sides of the light source (3).
EP07711419.7A 2006-02-01 2007-01-31 Lamp with a box-like lamp housing an a light outlet element Active EP1979668B1 (en)

Priority Applications (2)

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EP12164054A EP2476949A2 (en) 2006-02-01 2007-01-31 Lamp with a box-shaped lamp housing and transparent light emission element
EP12164020A EP2476948A2 (en) 2006-02-01 2007-01-31 Lamp with a box-shaped lamp housing and transparent light emission element

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DE102006004579 2006-02-01
DE102006017539 2006-04-13
DE102006027207A DE102006027207A1 (en) 2006-02-01 2006-06-12 Ceiling mounted light, has housing forming light discharge opening enclosed by light discharge unit, which has different light radiating characteristic that is opposite to other light radiating characteristic in one of radiation areas
PCT/EP2007/000822 WO2007088036A2 (en) 2006-02-01 2007-01-31 Lamp with a box-like lamp housing an a light outlet element

Related Child Applications (2)

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EP12164054A Division-Into EP2476949A2 (en) 2006-02-01 2007-01-31 Lamp with a box-shaped lamp housing and transparent light emission element

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EP1979668B1 true EP1979668B1 (en) 2017-03-15

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EP12164054A Withdrawn EP2476949A2 (en) 2006-02-01 2007-01-31 Lamp with a box-shaped lamp housing and transparent light emission element
EP07711419.7A Active EP1979668B1 (en) 2006-02-01 2007-01-31 Lamp with a box-like lamp housing an a light outlet element

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US (1) US8201978B2 (en)
EP (3) EP2476948A2 (en)
CN (1) CN101371071B (en)
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Also Published As

Publication number Publication date
CN101371071A (en) 2009-02-18
EP2476949A2 (en) 2012-07-18
EP2476948A2 (en) 2012-07-18
EP1979668A2 (en) 2008-10-15
CN101371071B (en) 2014-08-13
WO2007088036A2 (en) 2007-08-09
US8201978B2 (en) 2012-06-19
WO2007088036A3 (en) 2007-12-21
US20090303737A1 (en) 2009-12-10
DE102006027207A1 (en) 2007-08-02

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