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EP1155257A1 - Lamp - Google Patents

Lamp

Info

Publication number
EP1155257A1
EP1155257A1 EP00909047A EP00909047A EP1155257A1 EP 1155257 A1 EP1155257 A1 EP 1155257A1 EP 00909047 A EP00909047 A EP 00909047A EP 00909047 A EP00909047 A EP 00909047A EP 1155257 A1 EP1155257 A1 EP 1155257A1
Authority
EP
European Patent Office
Prior art keywords
light distribution
light
distribution device
luminaire
luminaire according
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.)
Withdrawn
Application number
EP00909047A
Other languages
German (de)
French (fr)
Inventor
Manfred Grimm
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.)
Trilux GmbH and Co KG
Original Assignee
Trilux Lenze GmbH and Co KG
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 Trilux Lenze GmbH and Co KG filed Critical Trilux Lenze GmbH and Co KG
Publication of EP1155257A1 publication Critical patent/EP1155257A1/en
Withdrawn legal-status Critical Current

Links

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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/10—Combinations of only two kinds of elements the elements being reflectors and screens
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/08—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures
    • F21V11/14—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using diaphragms containing one or more apertures with many small apertures
    • 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • 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
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/40—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of hollow light guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40—Lighting for industrial, commercial, recreational or military use
    • F21W2131/402—Lighting for industrial, commercial, recreational or military use for working places

Definitions

  • the invention relates to a luminaire with a flat, elongated luminaire housing and at least one longitudinal fluorescent lamp, from which a first light distribution device extends laterally, at which light emerges downwards.
  • the light distribution device consists of a plate-shaped light guide which extends between two fluorescent lamps arranged on the outside, so that its lateral end faces lie opposite the fluorescent lamps. At these end faces, light is coupled into the light guide, which is reflected inside the light guide at the top and bottom thereof.
  • a microprism structure to the underside of the plate-shaped light guide, the light is coupled out of it and directed downward with a directed and glare-free distribution.
  • the known luminaire Because of the fluorescent lamps arranged to the side of the light distribution device, they cannot be viewed directly from below. In addition to glare control of the fluorescent lamp even at shallow angles, the known luminaire also has a reduced luminance even at steep angles when the luminaire is viewed directly from below. This is intended to enable the use of such a luminaire, in particular in the case of flat reflection surfaces, such as, for example, flat screens. Despite its reduction, the luminance below the luminaire is still relatively high, so that disturbing reflections on flat surfaces cannot be ruled out. Another disadvantage of the known luminaire is the low efficiency of the known luminaire, since only part of the light emitted by the fluorescent lamps is coupled into the light guide. A considerable amount of light is lost for illuminating the usable area.
  • the object of the present invention is to develop a luminaire of the type mentioned at the outset in such a way that the light is emitted onto the usable area with improved efficiency and undesired light boundaries are avoided.
  • the first light distribution device has a hollow chamber extending transversely to the longitudinal direction, the underside of which is formed by at least one plate-shaped light distribution element, at which light emerges downwards through a housing opening, and a second light distribution device is provided below the fluorescent lamp, with which light is directed downward through a housing opening with a directed and glare-free distribution.
  • the second of which is arranged directly below the fluorescent lamp or lamps, light with an anti-glare distribution and directed at least below the fluorescent lamp or lamps is directed efficiently onto the usable area. At the same time, direct light radiation is avoided, so that no disturbing reflections and light limits occur.
  • the lamp is therefore particularly suitable for VDU workstations.
  • the light distribution element forming the underside of the first light distribution device is designed in such a way that the light emitted into the hollow chamber emerges diffusely through the plate-shaped light distribution element.
  • the first light distribution device has on both sides of the fluorescent lamp or a plurality of adjacent fluorescent lamps a hollow chamber which extends transversely to the longitudinal direction and has at least one light distribution element.
  • the fluorescent lamps are arranged approximately centrally with respect to the horizontal extension of the lamp housing, a hollow chamber extending laterally from the lamp or lamps and the second light distribution device centrally with respect to the lamp housing below the lamp or lamps is arranged.
  • the luminaire housing is expediently open at the top in the region of the first and / or second light distribution device, so that when the luminaire is used as a pendant luminaire light is radiated against the ceiling and indirectly directed onto the usable area.
  • the top of the hollow chamber or chambers can also be formed by at least one plate-shaped light distribution element, at which light emerges upwards through a housing opening.
  • the light distribution element can have a geometric scattering structure.
  • the light distribution element can be provided on its underside with a suitable scattering structure, for example a groove or prism structure, so that the light can spread diffusely.
  • a suitable scattering structure for example a groove or prism structure
  • it can also be designed as a profile structure with a large number of refractive surfaces through which the light is also diffusely scattered.
  • the light distribution element can consist of a scatterable material, for example in the form of a plate, or can be coated with a scatterable material.
  • the second light distribution device is produced from a luminaire grid made up of longitudinally extending reflectors and transversely running reflective lamellae.
  • any system can be considered with which light can be directed downwards with a specifically directed and glare-free distribution.
  • the second light distribution device can also have a suitable groove or prism structure that generates a directed and glare-free light distribution.
  • the second light distribution device can furthermore have an essentially horizontally arranged light guide plate which is provided with a plurality of openings and is directly adjacent to the fluorescent lamp or the fluorescent lamps. With the help of the light guide plate, the luminance below the second light distribution device is reduced, so that light can still be directed efficiently and optimally without reflection onto the usable area.
  • FIG. 1 is a bottom view of a first embodiment
  • Fig. 2 shows a section through the lamp shown in Fig. 1 along the line II-II and
  • Fig. 3 shows a section corresponding to FIG. 2 through another embodiment of a lamp.
  • the luminaires have a flat, elongated luminaire housing 1 and two longitudinal fluorescent lamps 2, from which a first light distribution device 3 extends to the side, at which the light emerges downwards .
  • the first light distribution device 3 consists of two hollow chambers 4 and 5 extending transversely to the longitudinal direction on both sides of the fluorescent lamps 2, the underside of which is formed by a plate-shaped light distribution element 6 and 7, respectively. At the light distribution elements 6 and 7, light emerges downwards through a housing opening 8 and 9, respectively.
  • a second light distribution device 10 is provided below the fluorescent lamps 2, with which light is directed downward through a housing opening 11 with a specifically directed and glare-free distribution.
  • the upper sides of the chambers 4 and 5 are likewise formed by plate-shaped light distribution elements 12 and 13, respectively, on which light emerges upwards through a housing opening 14.
  • the luminaire shown is used as a pendant luminaire, which indirectly directs light onto the usable surface via reflection from the ceiling.
  • the light distribution elements 6, 7 and 12, 13 are formed from plastic plates with a plurality of hollow chambers running in the longitudinal direction, as are commercially available.
  • the light emitted into the hollow chambers 4 and 5 is scattered on the surfaces of the hollow chamber system of the plastic plates and diffusely directed in all directions, in particular also in flat angular ranges with respect to the horizontal.
  • the light distribution elements 6, 7 and 12, 13 are inserted into longitudinal profiles 15 which are open on the inside and which are formed on the luminaire housing 1 at the edge of the housing openings 8, 9 and 14.
  • the second light distribution device 10 has a luminaire grid made up of longitudinally extending reflectors 16 and transversely running reflective slats 17. The luminaire grid is suspended in a downwardly projecting housing part of the luminaire housing 1 with the aid of spring clips 18 which can be pivoted laterally.
  • Fig. 1 shows the lamp described above from below.
  • the second light distribution device 10 extends in the longitudinal direction, which is designed as a luminaire grid with longitudinal reflectors 16 and transverse reflecting slats 17.
  • the spaces between the lamellae 17 are covered by the visor parts 19 shown in FIG. 1, so that a direct view of the fluorescent lamps from below is avoided.
  • the first light distribution device with the light distribution elements 6 and 7, which is designed as a hollow chamber, extends in flat housing areas.
  • the luminaire shown thus combines a broad light emission that extends over the entire length of the luminaire, in particular light that is diffusely scattered at flat angles Proven luminaire grid through which light is directed onto the usable area with targeted, glare-free distribution.
  • an essentially horizontally arranged light guide plate 20, provided with a plurality of openings, is provided between the fluorescent lamps 2 and the luminaire grid in the embodiment shown in FIG. 3.
  • the walls of the luminaire housing 1 consist of profile parts which are manufactured, for example, by extrusion and have a constant cross section over the entire length.
  • the box-shaped flat lamp housing 1 is arranged between two hollow profile rods 21 and 22 which serve as a carrying device for the lamp.
  • the profile rods 21 and 22 are enclosed by connecting elements 23 and 24 arranged on the longitudinal end faces of the lamp housing 1, which have the same height as the lamp housing 1 and can contain the operating devices necessary for the operation of the lamp.
  • the lamp housing 1 is fastened on the end face to the connecting elements 23 with the aid of longitudinally extending profile grooves 25, in which the threaded shafts engage in screws, not shown in the drawing.
  • the connecting elements 23 and 24 can have fastening devices for hanging the lamp on a ceiling.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

The invention relates to a lamp with a flat and longitudinal lamp housing (1) and at least one fluorescent lamp (2) which extends in the longitudinal direction. A first light distribution device (3) extends from the side of said fluorescent lamp (2). Light exits downwards from said light distribution device (3). The aim of the invention is to improve said lamp in such a way that the light is emitted onto a useful area with improved effectiveness. To this end, the first light distribution device (3) is provided with a hollow chamber (4, 5) that extends crosswise in relation to the longitudinal direction. The underside of said chamber (4, 5) is formed by at least one plate-like light distribution element (6, 7). Light emerges from said light distribution element (6, 7) through an opening of the housing (8, 9) in a downward direction. A second light distribution device (10) is provided underneath the fluorescent lamp (2). Light is directed in a downward direction through an opening of the housing (11) by means of said second light distribution device (10). The light is distributed in a directed and non-dazzling manner.

Description

Leuchte lamp

Die Erfindung betrifft eine Leuchte mit einem flach ausgebildeten und lang gestreckten Leuchtengehäuse und mindestens einer längs verlaufenden Leuchtstofflampe, von der aus sich seitlich eine erste Lichtverteilungseinrichtung erstreckt, an der Licht nach unten austritt.The invention relates to a luminaire with a flat, elongated luminaire housing and at least one longitudinal fluorescent lamp, from which a first light distribution device extends laterally, at which light emerges downwards.

Bei einer bekannten Leuchte der genannten Art besteht die Lichtverteilungseinrichtung aus einem plattenförmigen Lichtleiter, der sich zwischen zwei außen angeordneten Leuchtstofflampen erstreckt, so dass dessen seitliche Stirnseiten den Leuchtstofflampen gegenüberliegen. An diesen Stirnseiten wird Licht in den Lichtleiter eingekoppelt, das im Inneren des Lichtleiters an dessen Ober- und Unterseite reflektiert wird. Durch Aufbringen einer Mikroprismenstruktur an der Unterseite des plattenförmigen Lichtleiters wird das Licht aus diesem ausgekoppelt und mit einer gerichteten und entblendeten Verteilung nach unten gelenkt.In a known luminaire of the type mentioned, the light distribution device consists of a plate-shaped light guide which extends between two fluorescent lamps arranged on the outside, so that its lateral end faces lie opposite the fluorescent lamps. At these end faces, light is coupled into the light guide, which is reflected inside the light guide at the top and bottom thereof. By applying a microprism structure to the underside of the plate-shaped light guide, the light is coupled out of it and directed downward with a directed and glare-free distribution.

Aufgrund der seitlich zur Lichtverteilungseinrichtung angeordneten Leuchtstofflampen können diese von unten nicht direkt eingesehen werden. Neben der Entblendung der Leuchtstofflampe selbst unter flachen Winkeln ergibt sich bei der bekannten Leuchte eine reduzierte Leuchtdichte auch unter steilen Winkeln bei Einblick in die Leuchte direkt von unten. Dies soll die Verwendung einer derartigen Leuchte insbesondere bei flach liegenden Reflexionsflächen, wie zum Beispiel flach liegenden Bildschirmen, ermöglichen. Trotz ihrer Reduktion ist die Leuchtdichte unterhalb der Leuchte noch relativ hoch, so dass störende Reflexionen an flach liegenden Flächen nicht ausgeschlossen sind. Nachteilig bei der bekannten Leuchte ist weiterhin die geringe Effizienz der bekannten Leuchte, da nur ein Teil des von den Leuchtstofflampen abgestrahlten Lichtes in den Lichtleiter eingekoppelt wird. Ein erheblicher Lichtanteil geht für die Beleuchtung der Nutzfläche verloren.Because of the fluorescent lamps arranged to the side of the light distribution device, they cannot be viewed directly from below. In addition to glare control of the fluorescent lamp even at shallow angles, the known luminaire also has a reduced luminance even at steep angles when the luminaire is viewed directly from below. This is intended to enable the use of such a luminaire, in particular in the case of flat reflection surfaces, such as, for example, flat screens. Despite its reduction, the luminance below the luminaire is still relatively high, so that disturbing reflections on flat surfaces cannot be ruled out. Another disadvantage of the known luminaire is the low efficiency of the known luminaire, since only part of the light emitted by the fluorescent lamps is coupled into the light guide. A considerable amount of light is lost for illuminating the usable area.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine Leuchte der eingangs genannten Art so weiterzubilden, dass das Licht mit verbesserter Effizienz auf die Nutzfläche abge- strahlt wird und unerwünschte Lichtgrenzen vermieden werden.The object of the present invention is to develop a luminaire of the type mentioned at the outset in such a way that the light is emitted onto the usable area with improved efficiency and undesired light boundaries are avoided.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, dass bei der eingangs genannten Leuchte die erste Lichtverteilungseinrichtung eine sich quer zur Längsrichtung erstreckende hohle Kam- mer aufweist, deren Unterseite durch mindestens ein platten- förmiges Lichtverteilungselement gebildet wird, an dem Licht durch eine Gehäuseöffnung nach unten austritt, und unterhalb der Leuchtstofflampe eine zweite Lichtverteilungseinrichtung vorgesehen ist, mit der Licht mit einer gerichteten und ent- blendeten Verteilung durch eine Gehäuseöffnung nach unten gelenkt wird.The object is achieved according to the invention in that, in the luminaire mentioned at the outset, the first light distribution device has a hollow chamber extending transversely to the longitudinal direction, the underside of which is formed by at least one plate-shaped light distribution element, at which light emerges downwards through a housing opening, and a second light distribution device is provided below the fluorescent lamp, with which light is directed downward through a housing opening with a directed and glare-free distribution.

Aufgrund der erfindungsgemäßen Kombination der beiden Lichtverteilungseinrichtungen, von denen die zweite direkt unter- halb der Leuchtstofflampe oder -lampen angeordnet ist, wird Licht mit einer entblendeten und zumindest unterhalb der Leuchtstofflampe bzw. -lampen gerichteten Verteilung effizient auf die Nutzfläche gelenkt. Gleichzeitig wird eine direkte Lichtstrahlung vermieden, so dass keine störenden Reflexionen und Lichtgrenzen auftreten. Die Leuchte ist deshalb besonders für Bildschirmarbeitsplätze geeignet.Due to the combination according to the invention of the two light distribution devices, the second of which is arranged directly below the fluorescent lamp or lamps, light with an anti-glare distribution and directed at least below the fluorescent lamp or lamps is directed efficiently onto the usable area. At the same time, direct light radiation is avoided, so that no disturbing reflections and light limits occur. The lamp is therefore particularly suitable for VDU workstations.

In einer bevorzugten Ausführung ist das die Unterseite der ersten Lichtverteilungseinrichtung bildende Lichtverteilungs- element so beschaffen, dass das in die hohle Kammer abgestrahlte Licht durch das plattenförmige Lichtverteilungselement gerichtet diffus austritt. In einer vorteilhaften Weiterentwicklung der Erfindung weist die erste Lichtverteilungseinrichtung an beiden Seiten der Leuchtstofflampe oder mehrerer benachbarter Leuchtstofflampen jeweils eine sich quer zur Längsrichtung erstreckende hohle Kammer mit mindestens einem Lichtverteilungselement auf. Bei dieser Ausführung ist die bzw. sind die Leuchtstofflampen etwa mittig bezüglich der horizontalen Erstreckung des Leuchtengehäuses angeordnet, wobei sich jeweils eine hohle Kammer seitlich von der Lampe bzw. den Lampen ausgehend erstreckt und die zweite Lichtverteilungseinrichtung mittig bezüglich des Leuchtengehäuses unterhalb der Lampe bzw. Lampen angeordnet ist.In a preferred embodiment, the light distribution element forming the underside of the first light distribution device is designed in such a way that the light emitted into the hollow chamber emerges diffusely through the plate-shaped light distribution element. In an advantageous further development of the invention, the first light distribution device has on both sides of the fluorescent lamp or a plurality of adjacent fluorescent lamps a hollow chamber which extends transversely to the longitudinal direction and has at least one light distribution element. In this embodiment, the fluorescent lamps are arranged approximately centrally with respect to the horizontal extension of the lamp housing, a hollow chamber extending laterally from the lamp or lamps and the second light distribution device centrally with respect to the lamp housing below the lamp or lamps is arranged.

Zweckmäßigerweise ist das Leuchtengehäuse im Bereich der ersten und/oder zweiten Lichtverteilungseinrichtung nach oben offen, so dass bei Verwendung der Leuchte als Pendelleuchte Licht gegen die Decke abgestrahlt und indirekt auf die Nutzfläche gelenkt wird.The luminaire housing is expediently open at the top in the region of the first and / or second light distribution device, so that when the luminaire is used as a pendant luminaire light is radiated against the ceiling and indirectly directed onto the usable area.

Dazu kann die Oberseite der hohlen Kammer bzw. Kammern eben- falls durch mindestens ein plattenförmiges Lichtverteilungselement gebildet sein, an der Licht durch eine Gehäuseöffnung nach oben austritt.For this purpose, the top of the hollow chamber or chambers can also be formed by at least one plate-shaped light distribution element, at which light emerges upwards through a housing opening.

Zur Erzeugung einer diffusen Lichtstreuung kann das Lichtver- teilungselement eine geometrische Streustruktur aufweisen.To generate diffuse light scattering, the light distribution element can have a geometric scattering structure.

Zu diesem Zweck kann das Lichtverteilungselement an seiner Unterseite mit einer geeigneten Streustruktur, zum Beispiel einer Rillen- oder Prismenstruktur, versehen sein, so dass sich das Licht diffus ausbreiten kann. Andererseits kann es auch als eine Profilstruktur mit einer Vielzahl von lichtbrechenden Oberflächen ausgebildet sein, durch die das Licht ebenfalls diffus gestreut wird.For this purpose, the light distribution element can be provided on its underside with a suitable scattering structure, for example a groove or prism structure, so that the light can spread diffusely. On the other hand, it can also be designed as a profile structure with a large number of refractive surfaces through which the light is also diffusely scattered.

Als besonders vorteilhaft hat sich eine Kunststoffplatte mit mehreren in Längsrichtung verlaufenden Hohlkammern zur Verwendung als Lichtverteilungselement herausgestellt. Andererseits kann das Lichtverteilungselement aus streufähigem Material, zum Beispiel in Plattenform, bestehen oder mit einem streufähigen Material beschichtet sein.A plastic plate with a plurality of hollow chambers running in the longitudinal direction has been found to be particularly advantageous for use as a light distribution element. On the other hand, the light distribution element can consist of a scatterable material, for example in the form of a plate, or can be coated with a scatterable material.

In einer bevorzugten Weiterbildung der Erfindung ist die zweite Lichtverteilungseinrichtung als bekanntes System aus einem Leuchtenraster aus längs verlaufenden Reflektoren und quer verlaufenden reflektierenden Lamellen hergestellt. Darüber hinaus kommt jedes System in Betracht, mit dem Licht mit einer gezielt gerichteten und entblendeten Verteilung nach unten gelenkt werden kann.In a preferred development of the invention, the second light distribution device, as a known system, is produced from a luminaire grid made up of longitudinally extending reflectors and transversely running reflective lamellae. In addition, any system can be considered with which light can be directed downwards with a specifically directed and glare-free distribution.

So kann die zweite Lichtverteilungseinrichtung zum Beispiel auch eine geeignete Rillen- oder Prismenstruktur, die eine gerichtete und entblendete Lichtverteilung erzeugt, aufweisen.For example, the second light distribution device can also have a suitable groove or prism structure that generates a directed and glare-free light distribution.

Die zweite Lichtverteilungseinrichtung kann weiterhin ein mit einer Vielzahl von Durchbrüchen versehenes, unmittelbar zu der Leuchtstofflampe bzw. den Leuchtstofflampen benachbartes, im wesentlichen horizontal angeordnetes Lichtleitblech aufweisen. Mit Hilfe des Lichtleitblechs wird die Leuchtdichte unterhalb der zweiten Lichtverteilungseinrichtung reduziert, so dass Licht immer noch effizient und optimal reflexfrei auf die Nutzfläche gelenkt werden kann.The second light distribution device can furthermore have an essentially horizontally arranged light guide plate which is provided with a plurality of openings and is directly adjacent to the fluorescent lamp or the fluorescent lamps. With the help of the light guide plate, the luminance below the second light distribution device is reduced, so that light can still be directed efficiently and optimally without reflection onto the usable area.

Zwei Ausführungsbeispiele der Erfindung werden im Folgenden anhand der Zeichnung näher beschrieben.Two embodiments of the invention are described below with reference to the drawing.

In der Zeichnung zeigen:The drawing shows:

Fig. 1 eine Ansicht von unten eines ersten Ausführungsbeispiels ,1 is a bottom view of a first embodiment,

Fig. 2 einen Schnitt durch die in Fig. 1 gezeigte Leuchte längs der Linie II-II undFig. 2 shows a section through the lamp shown in Fig. 1 along the line II-II and

Fig. 3 einen Schnitt entsprechend Fig. 2 durch ein anderes Ausführungsbeispiel einer Leuchte. Wie am besten aus den Figuren 2 und 3 hervorgeht, weisen die Leuchten ein flach ausgebildetes und lang gestrecktes Leuchtengehäuse 1 und zwei längs laufende Leuchtstofflampen 2 auf, von denen aus sich seitlich eine erste Lichtverteilungsein- richtung 3 erstreckt, an der das Licht nach unten austritt.Fig. 3 shows a section corresponding to FIG. 2 through another embodiment of a lamp. As can best be seen from FIGS. 2 and 3, the luminaires have a flat, elongated luminaire housing 1 and two longitudinal fluorescent lamps 2, from which a first light distribution device 3 extends to the side, at which the light emerges downwards .

Die erste Lichtverteilungseinrichtung 3 besteht aus zwei sich quer zur Längsrichtung beidseitig der Leuchtstofflampen 2 erstreckenden hohlen Kammern 4 und 5, deren Unterseite durch je- weils ein plattenförmiges Lichtverteilungselement 6 bzw. 7 gebildet wird. An den Lichtverteilungselementen 6 und 7 tritt Licht nach unten durch eine Gehäuseöffnung 8 bzw. 9 aus.The first light distribution device 3 consists of two hollow chambers 4 and 5 extending transversely to the longitudinal direction on both sides of the fluorescent lamps 2, the underside of which is formed by a plate-shaped light distribution element 6 and 7, respectively. At the light distribution elements 6 and 7, light emerges downwards through a housing opening 8 and 9, respectively.

Unterhalb der Leuchtstofflampen 2 ist eine zweite Lichtver- teilungseinrichtung 10 vorgesehen, mit der Licht mit einer gezielt gerichteten und entblendeten Verteilung durch eine Gehäuseöffnung 11 nach unten gelenkt wird.A second light distribution device 10 is provided below the fluorescent lamps 2, with which light is directed downward through a housing opening 11 with a specifically directed and glare-free distribution.

Die Oberseiten der Kammern 4 und 5 werden ebenfalls durch plattenförmige Lichtverteilungselemente 12 bzw. 13 gebildet, an denen Licht durch eine Gehäuseöffnung 14 nach oben austritt. Die dargestellte Leuchte wird als Pendelleuchte verwendet, die indirekt Licht über Reflexion an der Decke auf die Nutzfläche lenkt.The upper sides of the chambers 4 and 5 are likewise formed by plate-shaped light distribution elements 12 and 13, respectively, on which light emerges upwards through a housing opening 14. The luminaire shown is used as a pendant luminaire, which indirectly directs light onto the usable surface via reflection from the ceiling.

Die Lichtverteilungselemente 6, 7 und 12, 13 sind aus Kunststoffplatten mit mehreren in Längsrichtung verlaufenden Hohlkammern, wie sie im Handel erhältlich sind, ausgebildet. Das in die hohlen Kammern 4 und 5 abgestrahlte Licht wird an den Oberflächen des Hohlkammersystems der Kunststoffplatten gestreut und diffus in alle Richtungen, insbesondere auch in flachen Winkelbereichen gegenüber der Horizontalen gelenkt.The light distribution elements 6, 7 and 12, 13 are formed from plastic plates with a plurality of hollow chambers running in the longitudinal direction, as are commercially available. The light emitted into the hollow chambers 4 and 5 is scattered on the surfaces of the hollow chamber system of the plastic plates and diffusely directed in all directions, in particular also in flat angular ranges with respect to the horizontal.

Wie aus den Figuren 2 und 3 weiterhin hervorgeht, sind die Lichtverteilungselemente 6, 7 und 12, 13 in längs gerichtete, an der Innenseite offene Profile 15, die am Rand der Gehäuseöffnungen 8, 9 und 14 an das Leuchtengehäuse 1 angeformt sind, eingeschoben. Wie ebenfalls in den Figuren 2 und 3 dargestellt ist, weist die zweite Lichtverteilungseinrichtung 10 ein Leuchtenraster aus längs verlaufenden Reflektoren 16 und quer verlaufenden reflektierenden Lamellen 17 auf. Das Leuchtenraster ist mit Hilfe seitlich verschwenkbarer Federbügel 18 in ein nach unten vorstehendes Gehäuseteil des Leuchtengehäuses 1 eingehängt.As can further be seen from FIGS. 2 and 3, the light distribution elements 6, 7 and 12, 13 are inserted into longitudinal profiles 15 which are open on the inside and which are formed on the luminaire housing 1 at the edge of the housing openings 8, 9 and 14. As is also shown in FIGS. 2 and 3, the second light distribution device 10 has a luminaire grid made up of longitudinally extending reflectors 16 and transversely running reflective slats 17. The luminaire grid is suspended in a downwardly projecting housing part of the luminaire housing 1 with the aid of spring clips 18 which can be pivoted laterally.

Fig. 1 zeigt die vorstehend beschriebene Leuchte von unten. In der Mitte des flach ausgebildeten und lang gestreckten Leuch- tengehäuses 1 erstreckt sich in Längsrichtung die zweite Lichtverteilungseinrichtung 10, die als Leuchtenraster mit längs verlaufenden Reflektoren 16 und quer verlaufenden reflektierenden Lamellen 17 ausgebildet ist. Die Zwischenräume zwischen den Lamellen 17 werden durch in Fig. 1 gezeigte Blen- denteile 19 abgedeckt, so dass ein direkter Einblick in die Leuchtstofflampen von unten vermieden wird.Fig. 1 shows the lamp described above from below. In the middle of the flat and elongated luminaire housing 1, the second light distribution device 10 extends in the longitudinal direction, which is designed as a luminaire grid with longitudinal reflectors 16 and transverse reflecting slats 17. The spaces between the lamellae 17 are covered by the visor parts 19 shown in FIG. 1, so that a direct view of the fluorescent lamps from below is avoided.

Beiderseitig des Leuchtenrasters erstreckt sich in flachen Gehäusebereichen die als Hohlkammern ausgebildete erste Licht- Verteilungseinrichtung mit den Lichtverteilungselementen 6 und 7. Die dargestellte Leuchte kombiniert somit einen breiten sich über die gesamte Länge der Leuchte erstreckenden Lichtaustritt, insbesondere auch unter flachen Winkeln diffus gestreuten Lichts mit einem bewährten Leuchtenraster, durch das Licht mit gezielt gerichteter und entblendeter Verteilung auf die Nutzfläche gelenkt wird.On both sides of the luminaire grid, the first light distribution device with the light distribution elements 6 and 7, which is designed as a hollow chamber, extends in flat housing areas. The luminaire shown thus combines a broad light emission that extends over the entire length of the luminaire, in particular light that is diffusely scattered at flat angles Proven luminaire grid through which light is directed onto the usable area with targeted, glare-free distribution.

Um die durch das Leuchtenraster erzeugte Leuchtdichte zu verringern, ist in dem in Fig. 3 dargestellten Ausführungsbei-- spiel ein mit einer Vielzahl von Durchbrüchen versehenes, im wesentlichen horizontal angeordnetes Lichtleitblech 20 zwischen den Leuchtstofflampen 2 und dem Leuchtenraster vorgesehen.In order to reduce the luminance generated by the luminaire grid, an essentially horizontally arranged light guide plate 20, provided with a plurality of openings, is provided between the fluorescent lamps 2 and the luminaire grid in the embodiment shown in FIG. 3.

Die Wände des Leuchtengehäuses 1 bestehen aus Profilteilen, die zum Beispiel im Strangpressverfahren hergestellt sind und über die gesamte Länge konstanten Querschnitt haben. Das kastenförmige flache Leuchtengehäuse- 1 ist zwischen zwei als Tragevorrichtung der Leuchte dienenden hohlen Profilstangen 21 und 22 angeordnet. Die Profilstangen 21 und 22 werden durch an den längsseitigen Stirnenden des Leuchtengehäuses 1 angeordnete Verbindungselemente 23 und 24 umschlossen, die die gleiche Höhe wie das Leuchtengehäuse 1 aufweisen und die für den Betrieb der Leuchte notwendigen Betriebsgeräte enthalten können. Das Leuchtengehäuse 1 ist stirnseitig an den Verbindungselementen 23 mit Hilfe von sich längs erstreckenden Pro- filnuten 25 befestigt, in die die Gewindeschäfte in der Zeichnung nicht dargestellter Schrauben eingreifen.The walls of the luminaire housing 1 consist of profile parts which are manufactured, for example, by extrusion and have a constant cross section over the entire length. The box-shaped flat lamp housing 1 is arranged between two hollow profile rods 21 and 22 which serve as a carrying device for the lamp. The profile rods 21 and 22 are enclosed by connecting elements 23 and 24 arranged on the longitudinal end faces of the lamp housing 1, which have the same height as the lamp housing 1 and can contain the operating devices necessary for the operation of the lamp. The lamp housing 1 is fastened on the end face to the connecting elements 23 with the aid of longitudinally extending profile grooves 25, in which the threaded shafts engage in screws, not shown in the drawing.

Die Verbindungselemente 23 und 24 können Befestigungsvorrichtungen zum Aufhängen der Leuchte an einer Decke aufweisen. The connecting elements 23 and 24 can have fastening devices for hanging the lamp on a ceiling.

BezugszeichenlisteReference list

Leuchtengehäuse Leuchtstofflampe erste Lichtverteilungseinrichtung hohle Kammer hohle Kammer Lichtverteilungselement Lichtverteilungselement Gehäuseöffnung Gehäuseöffnung zweite Lichtverteilungseinrichtung Gehäuseöffnung Lichtverteilungselement Lichtverteilungselement Gehäuseöffnung Profil Reflektor Lamelle Federbügel Blendenteil Lichtleitblech Profilstange Profilstange Verbindungselement Verbindungselement Profilnut Luminaire housing fluorescent lamp first light distribution device hollow chamber hollow chamber light distribution element light distribution element housing opening housing opening second light distribution device housing opening light distribution element light distribution element housing opening profile reflector lamella spring clip cover part light guide plate profile rod profile rod connecting element connecting element profile groove

Claims

Ansprüche Expectations 1. Leuchte mit einem flach ausgebildeten und lang gestreckten Leuchtengehäuse ( 1 ) und mindestens einer längs verlaufenden Leuchtstofflampe (2), von der aus sich seitlich eine erste Lichtverteilungseinrichtung (3) erstreckt, an der Licht nach unten austritt, d a d u r c h g e k e n n z e i c h n e t, dass die erste Lichtverteilungseinrich- tung (3) eine sich quer zur Längsrichtung erstreckende hohle Kammer (4, 5) aufweist, deren Unterseite durch mindestens ein plattenförmiges Lichtverteilungselement (6, 7) gebildet wird, an dem Licht durch eine Gehäuseöffnung (8, 9) nach unten austritt, und unterhalb der Leuchtstofflampe (2) eine zweite Lichtverteilungseinrichtung (10) vorgesehen ist, mit der Licht mit einer gerichteten und entblendeten Verteilung durch eine Gehäuseöffnung (11) nach unten gelenkt wird.1. Luminaire with a flat and elongated luminaire housing (1) and at least one longitudinal fluorescent lamp (2), from which a first light distribution device (3) extends laterally, at which light emerges downwards, characterized in that the first light distribution device - device (3) has a hollow chamber (4, 5) extending transversely to the longitudinal direction, the underside of which is formed by at least one plate-shaped light distribution element (6, 7), at which light emerges downwards through a housing opening (8, 9), and below the fluorescent lamp (2) a second light distribution device (10) is provided, with which light with a directed and glare-free distribution is directed downwards through a housing opening (11). 2. Leuchte nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, dass das in die hohle Kammer (4, 5) abgestrahlte Licht durch das plattenförmige Lichtverteilungselement (6, 7) gerichtet diffus austritt.2. Luminaire according to claim 1, so that the light emitted into the hollow chamber (4, 5) emerges diffusely through the plate-shaped light distribution element (6, 7). 3. Leuchte nach Anspruch 1 oder 2, d a d u r c h g e k e n n z e i c h n e t, dass die erste Lichtverteilungseinrichtung (3) an beiden Seiten der Leuchtstofflampe oder mehrerer benachbarter Leuchtstofflampen (2) jeweils eine sich quer zur Längsrichtung erstreckende hohle Kammer (4 und 5) mit mindestens einem Lichtverteilungselement (6 bzw. 7) aufweist.3. Luminaire according to claim 1 or 2, characterized in that the first light distribution device (3) on both sides of the fluorescent lamp or a plurality of adjacent fluorescent lamps (2) each have a hollow chamber (4 and 5) extending transversely to the longitudinal direction with at least one light distribution element (6 or 7). 4. Leuchte nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t, dass die Oberseite der hohlen Kammer bzw. Kammern (4 und 5) ebenfalls durch mindestens ein plattenförmiges Lichtverteilungselement (12 bzw. 13) gebildet wird, an dem Licht durch eine Gehäuseöffnung (14) nach oben austritt. 4. Luminaire according to one of claims 1 to 3, characterized in that the top of the hollow chamber or chambers (4 and 5) is also formed by at least one plate-shaped light distribution element (12 or 13) on the light through a housing opening (14 ) emerges upwards. 5. Leuchte nach einem der Ansprüche 2 bis 4, d a d u r c h g e k e n n z e i c h n e t, dass das Lichtverteilungselement (6, 7, 12, 13) eine geometrische Streustruktur aufweist.5. Luminaire according to one of claims 2 to 4, so that the light distribution element (6, 7, 12, 13) has a geometric scattering structure. 6. Leuchte nach Anspruch 5, d a d u r c h g e k e n n z e i c h n e t, dass das Lichtverteilungselement (6, 7, 12, 13) aus einer Kunststoffplatte mit mehreren in Längsrichtung verlaufenden Hohlkammern besteht.6. Luminaire according to claim 5, so that the light distribution element (6, 7, 12, 13) consists of a plastic plate with a plurality of hollow chambers running in the longitudinal direction. 7. Leuchte nach einem der Ansprüche 2 bis 6, d a d u r c h g e k e n n z e i c h n e t, dass das Lichtverteilungselement aus streufähigem Material besteht oder mit diesem beschichtet ist.7. Luminaire according to one of claims 2 to 6, d a d u r c h g e k e n n z e i c h n e t that the light distribution element consists of scatterable material or is coated with this. 8. Leuchte nach einem der Ansprüche 1 bis 7, d a d u r c h g e k e n n z e i c h n e t, dass die zweite Lichtverteilungseinrichtung (10) ein Leuchtenraster aus längs verlaufenden Reflektoren (16) und quer verlaufenden re- flektierenden Lamellen (17) aufweist.8. Luminaire according to one of claims 1 to 7, so that the second light distribution device (10) has a luminaire grid of longitudinal reflectors (16) and transverse reflecting slats (17). 9. Leuchte nach einem der Ansprüche 1 bis 7, d a d u r c h g e k e n n z e i c h n e t, dass die zweite Lichtverteilungseinrichtung eine Prismenstruktur für eine gezielte und entblendete Lichtverteilung aufweist.9. Luminaire according to one of claims 1 to 7, so that the second light distribution device has a prism structure for a targeted and glare-free light distribution. 10. Leuchte nach einem der Ansprüche 1 bis 9, d a d u r c h g e k e n n z e i c h n e t, dass die zweite Lichtverteilungseinrichtung ein mit einer Vielzahl von Durchbrü- chen versehenes, unmittelbar zu der Leuchtstofflampe bzw. den Leuchtstofflampen (2) benachbartes, im wesentlichen horizontal angeordnetes Lichtleitblech (20) aufweist. 10. Luminaire according to one of claims 1 to 9, so that the second light distribution device has an essentially horizontally arranged light guide plate (20), which is provided with a plurality of openings and is directly adjacent to the fluorescent lamp or the fluorescent lamps (2).
EP00909047A 1999-02-24 2000-02-22 Lamp Withdrawn EP1155257A1 (en)

Applications Claiming Priority (3)

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DE29903298U DE29903298U1 (en) 1999-02-24 1999-02-24 lamp
DE29903298U 1999-02-24
PCT/DE2000/000481 WO2000050806A1 (en) 1999-02-24 2000-02-22 Lamp

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EP1155257A1 true EP1155257A1 (en) 2001-11-21

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AU (1) AU3146700A (en)
DE (1) DE29903298U1 (en)
WO (1) WO2000050806A1 (en)

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WO2000050806A1 (en) 2000-08-31
DE29903298U1 (en) 1999-05-12

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