EP0159534B1 - Elongated light fitting - Google Patents

Elongated light fitting Download PDF

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Publication number
EP0159534B1
EP0159534B1 EP85103159A EP85103159A EP0159534B1 EP 0159534 B1 EP0159534 B1 EP 0159534B1 EP 85103159 A EP85103159 A EP 85103159A EP 85103159 A EP85103159 A EP 85103159A EP 0159534 B1 EP0159534 B1 EP 0159534B1
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EP
European Patent Office
Prior art keywords
cross
lamp
lamella
light
section
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.)
Expired
Application number
EP85103159A
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German (de)
French (fr)
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EP0159534A1 (en
Inventor
Franz Eugen Dipl.-Phys. Ing. Grawe
Manfred Grimm
Richard Dr.-Ing. Schneppendahl
Fred Dr.-Ing. Hasemann
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Trilux GmbH and Co KG
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Trilux Lenze GmbH and Co KG
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Application filed by Trilux Lenze GmbH and Co KG filed Critical Trilux Lenze GmbH and Co KG
Priority to AT85103159T priority Critical patent/ATE27350T1/en
Publication of EP0159534A1 publication Critical patent/EP0159534A1/en
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    • 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
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/06—Optical design with parabolic curvature
    • 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 invention relates to a luminaire with at least one elongated fluorescent lamp and a grid of longitudinal reflectors arranged parallel to a plane through the lamp axis and cross-arranged, cross-sectionally approximately V-shaped, reflecting transverse lamellae whose lamellae legs converge in the direction from said plane and, preferably are parabolic in cross section.
  • Luminaires according to the preamble of claim 1 are known from DE-PS 30 05 762. Their grids are formed by longitudinal reflectors which are parallel to the lamp and are arranged at right angles to it and have cross-sectionally approximately V-shaped reflecting transverse lamellae, the lamella legs of which are parabolic in cross-section. With these grids, however, only a part of the luminous flux is directed. The vertically emerging luminous flux component of the lamp passes unhindered through the grids and can therefore lead to strong brightening in the areas below it, for example to reflective glare if appropriately arranged at a work station.
  • the aim of the grid is also to direct the luminous flux of the elongated fluorescent lamp in the desired directions. This is easily accomplished in the transverse direction of the lamp, since the fluorescent lamp, which is tubular in cross-section, has a relatively small dimension in comparison to the cross-sectional area of the grid and thus approximately represents a point-shaped light source.
  • the lamp In the longitudinal direction, the lamp is very large compared to the space between two lamellae. Each slat segment is illuminated by a lamp section that is significantly longer than the slat segment. The directional angle of such a frame is therefore only very small in the longitudinal direction.
  • each prism causes a beam splitting by refraction.
  • the prism as an optical system is very small compared to the light source.
  • considerable scatter and total reflection occurs for the remaining large solid angle range, so that a very large scattering component is superimposed on the desired light control.
  • the unavoidable light conduction in such plastic prism covers also leads to such a high overall brightening of the cover, which creates glare effects at the work station located below.
  • the object of the invention is to direct the majority of the downward emerging luminous flux portion of the lamp in the longitudinal direction with the grid in the lower half-space in a luminaire of the type mentioned, so that only a very low luminous flux portion seen directly and unguided from the lamp in the lamp longitudinal direction passes through the grid.
  • This object of the invention is achieved on a lamp of the type mentioned at the outset, which is characterized in that a light guide plate which is directed obliquely to the lamp and extends almost to the lamp is arranged on one leg of each transverse lamella, and the space between this leg and the next adjacent transverse lamella is arranged covered.
  • the elongated lamp is subdivided into sections by the light guide plates reaching close to the lamp, each lamella or lamella segment being illuminated only by a certain short lamp section.
  • the light-directing "optical system” thus only receives light from a limited solid angle range.
  • the position of the "luminous" solid angle range can be changed in relation to the light-directing optics.
  • the desired main direction of emission can thus be predetermined in accordance with the desired light distribution of the luminaire, with no or no significant luminous flux component emerging directly from the grid. With the appropriate position of the transverse slats and their light guide plates, these lights are therefore particularly suitable for use as workstation lights in connection with display devices in which there are increased demands on glare-free properties.
  • FIG. 1 Under the lamp 3, which is not shown in the housing, a grid is placed below it, which is formed from longitudinal reflectors 2 parallel to the lamp and transverse cross-sections 3 which are V-shaped in cross section.
  • the legs 34 and 32 of these transverse slats forming reflectors are parabolic in cross section.
  • the slats are preferably made of high-gloss or satin-structured mirror material.
  • In each case on one leg 31 of the transverse lamellae 3 are arranged obliquely upwards at an angle a to the horizontal light guide plates 4, which extend almost to the lamp 1.
  • the light guide plates 4 are dimensioned such that they cover the space between adjacent transverse lamellae 3 in the vertical projection.
  • the rays 5 show, light mainly reflected on the lamella leg 31 emerges from the grid in the longitudinal direction of the lamp 1 in the illustrated luminaire. Due to the parallel arrangement of the light guide plates 4 to each other, a strong rectification of the reflected luminous flux is achieved.
  • two grid sections can be formed on a grid according to FIG. 2.
  • the light guide plates 4 B on the transverse lamellae 3 B diagonally towards the top right, so that a direction of luminous flux arises approximately corresponding to the beam 5 B.
  • the light guide plates 4 A on the transverse fins 3 A are directed obliquely to the left up to the lamp 1. The direction of luminous flux corresponds to the beam 5 A.
  • Asymmetrical luminous flux control is achieved with a grid light according to FIG. 3. All light guide plates 4 C are directed parallel to each other obliquely to the right up to the lamp 1. There is a directivity corresponding to the rays 5 C. The light distribution corresponds to the light distribution curve according to FIG. 3a.
  • a grid light according to FIG. 4 can be used in particular as a workplace light.
  • the grid of this light with the lamp 1 is again divided into two sections.
  • the light guide plates 4 E are formed on the transverse lamellae 3 E at an angle to the left up to the lamp 1.
  • To the left of the axis of symmetry are formed on the transverse lamellae 3 D obliquely to the top right, almost reaching to the lamp 1.
  • the indicated rays 5 D and 5 E show the pronounced preferred directions of the light distribution curve according to FIG. 4a.
  • Such a light distribution is particularly desirable for workplace lighting.
  • the spacing of the transverse slats can be constant or different.

Abstract

An elongated luminaire is provided having at least one fluorescent lamp and a louver arranged therebelow. The louver consists of lamp-parallel longitudinal reflectors and reflecting cross-oriented lamellae arranged transversely thereto and subsequently of V-shape in cross section. The lamella legs have a parabolic shape in cross section. A light guiding plate is provided extending from one leg of each cross-oriented lamella, extending diagonally upwardly towards and almost adjacent to the lamp. Each light guiding plate substantially overlaps the interspace between neighboring cross-oriented lamella in the vertical projection. Thus, the entire light flux, emerging downwards, is directed, depending on the position of the cross-oriented lamellae and of the light guiding plates, in the desired direction into the lower hemisphere so that it is possible to obtain different light distribution curves of symmetrical or asymmetrical shape with characteristic preferred directions.

Description

Die Erfindung betrifft eine Leuchte mit mindestens einer langgestreckten Leuchtstofflampe und einem parallel zu einer Ebene durch die Lampenachse angeordneten Raster aus lampenachsparallelen Längsreflektoren und dazu kreuzend angeordneten, im Querschnitt etwa V-förmigen, reflektierenden Querlamellen deren Lamellenschenkel in Richtung von der genannten Ebene ab konvergieren und vorzusgweise im Querschnitt parabelförmig ausgebildet sind.The invention relates to a luminaire with at least one elongated fluorescent lamp and a grid of longitudinal reflectors arranged parallel to a plane through the lamp axis and cross-arranged, cross-sectionally approximately V-shaped, reflecting transverse lamellae whose lamellae legs converge in the direction from said plane and, preferably are parabolic in cross section.

Diese Leuchtenraster bilden einen Blendschutz, mit dem insbesondere erreicht werden soll, daß unter bestimmtem Sichtwinkel eine Raumbeleuchtung im wesentlichen blendungsfrei ist. Leuchten nach dem Oberbegriff des Anspruches 1 sind bekannt aus der DE-PS 30 05 762. Ihre Raster werden dabei gebildet von lampenachsparallelen Längsreflektoren und dazu rechtwinklig angeordneten, im Querschnitt etwa V-förmigen reflektierenden Querlamellen, deren Lamellenschenkel im Querschnitt parabelförmig sind. Mit diesen Rastern wird jedoch nur ein Teil des Lichtstromes gelenkt. Der senkrecht austretende Lichtstromanteil der Lampe geht ungehindert durch die Raster hindurch und kann daher zu starken Aufhellungen in darunter angeordneten Bereichen führen, beispielsweise zu Reflexblendungen bei entsprechender Anordnung an einem Arbeitsplatz.These luminaire grids form a glare protection, with which it is to be achieved in particular that, under a certain viewing angle, room lighting is essentially glare-free. Luminaires according to the preamble of claim 1 are known from DE-PS 30 05 762. Their grids are formed by longitudinal reflectors which are parallel to the lamp and are arranged at right angles to it and have cross-sectionally approximately V-shaped reflecting transverse lamellae, the lamella legs of which are parabolic in cross-section. With these grids, however, only a part of the luminous flux is directed. The vertically emerging luminous flux component of the lamp passes unhindered through the grids and can therefore lead to strong brightening in the areas below it, for example to reflective glare if appropriately arranged at a work station.

Ziel der Raster ist es ebenfalls den Lichtstrom der langgestreckten Leuchtstofflampe in gewünschte Richtungen zu lenken. In Lampenquerrichtung gelinge dies einfach, da die im Querschnitt rohrförmige Leuchtstofflampe eine relativ kleine Abmessung im Vergleich zum Rasterquerschnitt besitzt und damit annähernd eine punktförmige Lichtquelle darstellt. In Langsrichtung ist die Lampe im Vergleich zu dem Zwischenraum zwischen zwei Lamellen seht groß. Jedes Lamellensegment wird von einem Lampenabschnitt beleuchtet der wesentlich länger als das Lamellensegment ist. Die Richtwinkung eines solchen Rahmers ist daher in Längsrichtung nur sehr gering.The aim of the grid is also to direct the luminous flux of the elongated fluorescent lamp in the desired directions. This is easily accomplished in the transverse direction of the lamp, since the fluorescent lamp, which is tubular in cross-section, has a relatively small dimension in comparison to the cross-sectional area of the grid and thus approximately represents a point-shaped light source. In the longitudinal direction, the lamp is very large compared to the space between two lamellae. Each slat segment is illuminated by a lamp section that is significantly longer than the slat segment. The directional angle of such a frame is therefore only very small in the longitudinal direction.

Bei einer Arbeitsplatzleuchte nach der DE-OS 30 30 080 ist bereits vorgeschlagen worden, durch Schrägstellung der Rasterlamellen den Lichstrom in Lampenlängsrichtung in wirkungsvollerer Weise zu lenken. Der Lichtstrom der Lampe parallel oder nahezu parallel zur schrägstehenden Lamellenebene tritt zwischen den Lamellen ungehindert hindurch. Da sich diese Lamellen überlagern, tritt zwar kein Licht ungehindert in senkrechter Richtung aus es kommt jedoch durch Mehrfachreflexionen zu Aufhellung der Lamellen und damit zu Lichtstromanteilen in ungewünschter Richtung. Um diesen ungewünschten Anteil zu verringern, ist vorgeschlagen worden, entweder nicht reflektierende, d.h. schwarze Hilfslamellen anzubringen oder die Unterseite der schräg stehenden Lamellen nicht reflektierend auszubilden. Beides führt zu hohen Lichtverlusten. Insbesondere treten bei diesen Leuchten in relativ großen Endbereichen Aufhellungen aufgrund des direkten Lichtaustrittes und durch Mehrfachreflektionen auf, so daß darunter angeordnete Arbeitsplätze einen hohen Lichtstromanteil aus ungünstigen Winkeln erhalten, der zu Reflexblendungen führt. Diese Aufhellungen können nicht durch bereits vorgeschlagene geschwäzte Hilfslamellen verhindert werden, die darüberhinaus die Fertigungskosten eines solchen Rasters erhöhen und zu hohen Lichtverlusten führen.In a workplace lamp according to DE-OS 30 30 080, it has already been proposed to steer the luminous flux in the longitudinal direction of the lamp in a more effective manner by inclining the louvres. The luminous flux of the lamp parallel or almost parallel to the sloping lamella plane passes freely between the lamellae. Since these slats overlap, no light emerges unhindered in the vertical direction, but multiple reflections lighten the slats and thus lead to luminous flux components in the undesired direction. In order to reduce this undesirable proportion, it has been proposed to use either non-reflective, i.e. attach black auxiliary slats or make the underside of the sloping slats reflective. Both lead to high light losses. In particular, brightening occurs in these luminaires in relatively large end areas due to the direct light emission and multiple reflections, so that workplaces arranged below receive a high luminous flux component from unfavorable angles, which leads to reflected glare. These brightenings cannot be prevented by previously proposed blackened auxiliary slats, which furthermore increase the production costs of such a grid and lead to high light losses.

Mit Prismenabdeckungen an langgestreckten Leuchten ist bereits nach der DE-PS 26 30 556 vorgeschlagen werden den Lichtstrom in Lampenlängsrichtung zu lenken, um weitgehend gerichtetes Licht zu erhalten. In der Praxis zeigt sich jedoch, daß jedes Prisma eine Strahlenteilung durch Brechung bewirkt. Das Prisma als optisches System ist sehr klein im Vergleich zur Lichtquelle. Neben der Lichtlenkung die nur für einen kleinen Raumwinkelbereich in gewünschter Richtung erfolgt, tritt für den übrigen großen Raumwinkelbereich erhebliche Streuung und Totalreflektion auf, so daß sich der gewünschten Lichtlenkung ein sehr großen Streuanteil überlagert. Die nicht zu vermeidende Lichtleitung in solchen Kunststoffprismenabdeckungen führt außerdem zu einer so hohen Gesamtaufhellung der Abdeckung, die Blendwirkungen am darunter angeordneten Arbeitsplatz entstehen lassen.With prismatic covers on elongated lights it has already been proposed according to DE-PS 26 30 556 to steer the luminous flux in the longitudinal direction of the lamp in order to obtain largely directed light. In practice, however, it turns out that each prism causes a beam splitting by refraction. The prism as an optical system is very small compared to the light source. In addition to directing the light, which occurs only in the desired direction for a small solid angle range, considerable scatter and total reflection occurs for the remaining large solid angle range, so that a very large scattering component is superimposed on the desired light control. The unavoidable light conduction in such plastic prism covers also leads to such a high overall brightening of the cover, which creates glare effects at the work station located below.

Die Aufgabe der Erfindung besteht darin bei einer Leuchte der eingangs genannten Art den überwiegenden des nach unten austretenden Lichtstromanteils der Lampe in Längsrichtung mit dem Raster in den unteren Halbraum zu lenken, so daß nur ein sehr deringer Lichtstromanteil direkt und ungelenkt von der Lampe in Lampenlängsrichtung gesehen durch das Raster hindurchtritt.The object of the invention is to direct the majority of the downward emerging luminous flux portion of the lamp in the longitudinal direction with the grid in the lower half-space in a luminaire of the type mentioned, so that only a very low luminous flux portion seen directly and unguided from the lamp in the lamp longitudinal direction passes through the grid.

Gelöst wird diese Erfindungsaufgabe an einer Leuchte der eingangs genannten Art, die dadurch gekennzeichnet ist daß jeweils an einem Schenkel jeder Querlamelle ein schräg zur Lampe gerichtetes, sich nahezu bis an die Lampe erstreckendes Lichtleitblech angeordnet ist, welches den Zwischenraum von diesem Schenkel zur nächst benachbarten Querlamelle überdeckt.This object of the invention is achieved on a lamp of the type mentioned at the outset, which is characterized in that a light guide plate which is directed obliquely to the lamp and extends almost to the lamp is arranged on one leg of each transverse lamella, and the space between this leg and the next adjacent transverse lamella is arranged covered.

Erfindungsgemäß wird die langgestreckte Lampe durch die bis nahe an die Lampe reichenden Lichtleitbleche in Abschnitte unterteilt wobei jede Lamelle bzw. jedes Lamellensegment nur von einem bestimmten kurzen Lampenabschnitt beleuchtet wird. Das lichtlenkende "optische System" erhält damit nur Lichtstrom aus einem begrenzten Raumwinkelbereich. Je nach Neigung der Lichtleitbleche kann der "leuchtende" Raumwinkelbereich in seiner Lage in Bezug auf die lichtlenkende Optik verändert werden. Somit kann die gewünschte Hauptabstahlrichtung entsprechend der gewünschten Lichtverteilung der Leuchte vorausbestimmt werden, wobei kein oder kein nennenswerter Lichtstromanteil direkt aus dem Raster austritt. Diese Leuchten sind daher bei entsprechender Stellung der Querlamellen mit ihren Lichtleitblechen besonders geeignet für die Verwendung als Arbeitsplatzleuchten in Verbindung mit Bildschirmgeräten, bei denen erhöhte Anforderungen an die Blendungsfreiheit gestellt werden.According to the invention, the elongated lamp is subdivided into sections by the light guide plates reaching close to the lamp, each lamella or lamella segment being illuminated only by a certain short lamp section. The light-directing "optical system" thus only receives light from a limited solid angle range. Depending on the inclination of the light guide plates, the position of the "luminous" solid angle range can be changed in relation to the light-directing optics. The desired main direction of emission can thus be predetermined in accordance with the desired light distribution of the luminaire, with no or no significant luminous flux component emerging directly from the grid. With the appropriate position of the transverse slats and their light guide plates, these lights are therefore particularly suitable for use as workstation lights in connection with display devices in which there are increased demands on glare-free properties.

Anhand schematischer Längsschnitte durch Rasterleuchten wird die Erfindung im folgenden näher erläutert. Es zeigt:

  • Figur 1 einen Teillängsschnitt durch eine Rasterleuchte an deren Querlamellen zueinander parallele lichtleitbleche angeformt sind.
  • Figur 2 einen Längsschnitt durch eine Rasterleuchte mit nach außen gerichteter Lichtstromverteilung.
  • Figur 2a die zugehörige Lichtverteilungskurve,
  • Figur 3 einen Längsschnitt durch eine Rasterleuchte mit asymmetrischer Lichtstromverteilung
  • Figur 3a die zugehörige Lichtverteilungskurve,
  • Figur 4 einen Längsschnitt durch eine Rasterleuchte mit nach innen gerichteter Lichtstromverteilung.
  • Figur 4a die zugehörige Lichtverteilungskurve.
The invention is explained in more detail below with the aid of schematic longitudinal sections through grid lights. It shows:
  • 1 shows a partial longitudinal section through a louvre lamp on the transverse lamellae parallel to each other light guide plates are formed.
  • Figure 2 shows a longitudinal section through a louvre with outward light flux distribution.
  • FIG. 2a the associated light distribution curve,
  • Figure 3 shows a longitudinal section through a louvre with asymmetrical luminous flux distribution
  • FIG. 3a the associated light distribution curve,
  • Figure 4 shows a longitudinal section through a louvre with inward light flux distribution.
  • Figure 4a the associated light distribution curve.

Zunächst wird auf Fig. 1 Bezug genommen. Unter der im nicht gezeigten Gehäuse gehaltenen Lampe 3 ist ein Raster untergesetzt, welches aus lampenachsparallelen Längsreflektoren 2 und dazu rechtwinklig angeordneten, im Querschnitt V-förmigen Querlamellen 3 gebildet wird. Die Schenkel 34 und 32 dieser Reflektoren bildenden Querlamellen sind im Querschnitt parabelförmig ausgebildet. Vorzugsweise bestehen die Lamellen aus hochglänzendem oder seidenmatt strukturiertem Spiegelmaterial. Jeweils an einem Schenkel 31 der Querlamellen 3 sind schräg nach oben unter einem Winkel a zur Horizontalen Lichtleitbleche 4 angeordnet, die nahezu bis zur Lampe 1 reichen.First, reference is made to FIG. 1. Under the lamp 3, which is not shown in the housing, a grid is placed below it, which is formed from longitudinal reflectors 2 parallel to the lamp and transverse cross-sections 3 which are V-shaped in cross section. The legs 34 and 32 of these transverse slats forming reflectors are parabolic in cross section. The slats are preferably made of high-gloss or satin-structured mirror material. In each case on one leg 31 of the transverse lamellae 3 are arranged obliquely upwards at an angle a to the horizontal light guide plates 4, which extend almost to the lamp 1.

Um zu verhindern, daß direktes Licht von der Lampe 1 durch den Zwischenraum zweier benachbarter Querlamellen 3 nach außen tritt, sind die Lichtleitbleche 4 so bemessen, daß sie den Zwischenraum zwischen benachbarten Querlamellen 3 in der senkrechten Projektion überdecken. Wie die Strahlen 5 zeigen, tritt bei der dargestellten Leuchte verwiegend am Lamellenschenkel 31 reflektiertes Licht aus dem Raster in Längsrichtung der Lampe 1 aus. Durch die parallele Anordnung der Lichtleitbleche 4 zueinander wird eine starke Gleichrichtung des reflektiert austretenden Lichtstromes erreicht.In order to prevent direct light from the lamp 1 from passing through the space between two adjacent transverse lamellae 3, the light guide plates 4 are dimensioned such that they cover the space between adjacent transverse lamellae 3 in the vertical projection. As the rays 5 show, light mainly reflected on the lamella leg 31 emerges from the grid in the longitudinal direction of the lamp 1 in the illustrated luminaire. Due to the parallel arrangement of the light guide plates 4 to each other, a strong rectification of the reflected luminous flux is achieved.

Um eine von einer Quersymmetrieachse ausgehende nach außen gerichtete Lichstromverteilung erhalten, können entsprechend Fig. 2 an einem Raster zwei Rasterabschnitte ausgebildet werden. Rechts von der Symmetrieachse weisen die Lichtleitbleche 4 B an den Querlamellen 3 B schräg nach rechts oben, so daß sich eine Lichtstromrichtung etwa entsprechend dem Strahl 5 B ergibt. Links von der Symmetrieachse sind die Lichtleitbleche 4 A an den Querlamellen 3 A schräg nach links oben bis zur Lampe 1 gerichtet. Es ergibt sich die Lichtstromrichtung entsprechend dem Strahl 5 A.In order to obtain an outward-directed luminous flux distribution starting from a transverse symmetry axis, two grid sections can be formed on a grid according to FIG. 2. To the right of the axis of symmetry, the light guide plates 4 B on the transverse lamellae 3 B diagonally towards the top right, so that a direction of luminous flux arises approximately corresponding to the beam 5 B. To the left of the axis of symmetry, the light guide plates 4 A on the transverse fins 3 A are directed obliquely to the left up to the lamp 1. The direction of luminous flux corresponds to the beam 5 A.

Eine asymmetrische Lichtstromlenkung wird mit einer Rasterleuchte nach Fig. 3 erreicht. Sämtliche Lichtleitbleche 4 C sind parallel zueinander schräg nach rechts oben bis zur Lampe 1 reichend gerichtet. Es ergibt sich eine Richtwirkung entsprechend den Strahlen 5 C. Die Lichtverteilung entspricht der Lichtverteilungskurve entsprechend Fig. 3a.Asymmetrical luminous flux control is achieved with a grid light according to FIG. 3. All light guide plates 4 C are directed parallel to each other obliquely to the right up to the lamp 1. There is a directivity corresponding to the rays 5 C. The light distribution corresponds to the light distribution curve according to FIG. 3a.

Insbesondere als Arbeitsplatzleuchte ist eine Rasterleuchte nach Fig. 4 einsetzbar. Das Raster dieser Leichte mit der Lampe 1 ist wiederum in zwei Abschnitte eingeteilt. Rechts von der Symmetrieachse sind an den Querlamellen 3 E die Lichtleitbleche 4 E schräg nach links oben bis zur Lampe 1 reichend ausgebildet. Links von der Symmetrieachse sind dagegen an den Querlamellen 3 D schräg nach rechts oben nahezu bis zur Lampe 1 reichend aus gebildet. Die angedeuteten Strahlen 5 D und 5 E zeigen die ausgeprägten Vorzugsrichtungen der Lichtverteilungskurve gemäß Fig. 4a. Eine solche Lichtverteilung wird insbesondere für Arbeitsplatzbeleuchtungen gewünscht. Grundsätzlich besteht auch die Möglichkeit, die erfindungsgemäßen Raster in mehrere Bereiche mit zueinander parallelen bzw. gegeneinander gerichteten Lichtleitblechen aufzuteilen. Die Abstände der Querlamellen können dabei konstant oder unterschiedlich sein.A grid light according to FIG. 4 can be used in particular as a workplace light. The grid of this light with the lamp 1 is again divided into two sections. To the right of the axis of symmetry, the light guide plates 4 E are formed on the transverse lamellae 3 E at an angle to the left up to the lamp 1. To the left of the axis of symmetry, on the other hand, are formed on the transverse lamellae 3 D obliquely to the top right, almost reaching to the lamp 1. The indicated rays 5 D and 5 E show the pronounced preferred directions of the light distribution curve according to FIG. 4a. Such a light distribution is particularly desirable for workplace lighting. In principle, there is also the possibility of dividing the grids according to the invention into a plurality of areas with light guide plates which are parallel to one another or directed towards one another. The spacing of the transverse slats can be constant or different.

Es besteht auch die Möglichkeit, die Querlamellen des Rasters zur Längsrichtung der Lampe nicht rechtwinklig anzuordnen, um dadurch diagonal zum Leuchtengrundriß eine asymmetrische Lichtstärkeverteilung zu erreichen.There is also the option of not arranging the cross lamellae of the grid at right angles to the longitudinal direction of the lamp, in order to achieve an asymmetrical light distribution diagonally to the luminaire floor plan.

Claims (4)

1. Luminaires with at least one elongated fluorescent lamp below which is arranged a louvre, parallel to a plane through the axis of the lamp and consisting of longitudinal reflectors which are parallel to the axis of the lamp, and transversely arranged reflecting cross-lamella which are approximately V-shaped in cross section, the sides of which are convergent in the direction away from the referred to plain and in cross section, preferably parabolic shaped, which are further characterized by the arrangement of a ligth controlling vane (4) at one side (31) of each cross-lamella (3), this being inclined to the lamp (1) and extending almost to the lamp, covering the space between the lamella side and the neighbouring cross-lamella (3).
2. Luminaires according to claim 1 are characterized by all controling vanes (4, 4C) being arranged in parallel to each other.
3. Luminaires according to claim 1 are characterized by the controlling vanes (4A, 4D as well as 4B, 4E) in certain areas being directed towards each other.
4. Luminaires according to claim 1 are characterized by the controlling vanes (4) forming part of the side (31) ot the associated-cross-lamella (3).
EP85103159A 1984-03-31 1985-03-19 Elongated light fitting Expired EP0159534B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85103159T ATE27350T1 (en) 1984-03-31 1985-03-19 EXTENDED LUMINAIRE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3412162A DE3412162C1 (en) 1984-03-31 1984-03-31 Elongated lamp
DE3412162 1984-03-31

Publications (2)

Publication Number Publication Date
EP0159534A1 EP0159534A1 (en) 1985-10-30
EP0159534B1 true EP0159534B1 (en) 1987-05-20

Family

ID=6232313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85103159A Expired EP0159534B1 (en) 1984-03-31 1985-03-19 Elongated light fitting

Country Status (14)

Country Link
US (1) US4621309A (en)
EP (1) EP0159534B1 (en)
JP (1) JPS60246503A (en)
KR (1) KR850006472A (en)
AT (1) ATE27350T1 (en)
AU (1) AU4070585A (en)
BR (1) BR8501487A (en)
CA (1) CA1248929A (en)
DD (1) DD231839A5 (en)
DE (1) DE3412162C1 (en)
DK (1) DK143685A (en)
FI (1) FI851284L (en)
NO (1) NO851176L (en)
ZA (1) ZA851681B (en)

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DE3834492A1 (en) * 1988-10-11 1990-04-12 Langmatz Lic Gmbh LIGHT INDICATOR
NO167944C (en) * 1989-04-07 1991-12-27 Ifa Electric As DEVICE FOR LIGHT RANGE LIGHT
US5008791A (en) * 1990-07-19 1991-04-16 Caferro Ronald N Low direct glare and wall wash parabolic lighting grid
JPH07161217A (en) * 1993-12-07 1995-06-23 Shinjiyu Kagaku Kenkyusho:Kk Luminaire for color evaluation
NZ300261A (en) * 1995-02-14 1997-11-24 Philips Electronics Nv Luminaire with lamellae having concave outer edges for providing more uniform illumination
US5958326A (en) * 1997-09-05 1999-09-28 Caferro; Ronald N. Process for producing a lighting louver
DE29903298U1 (en) 1999-02-24 1999-05-12 Trilux Lenze Gmbh & Co Kg lamp
US6139169A (en) * 1999-04-01 2000-10-31 Caferro; Ronald N. Encased louvers for outdoor lighting
US6626560B1 (en) 2000-11-22 2003-09-30 Ronald N. Caferro Lighting louver
US6702453B2 (en) 2001-10-26 2004-03-09 Birchwood Lighting, Inc. Flexible light fixture
GB2411947B (en) * 2004-03-11 2007-07-11 Sortex Ltd Light guide assembly
DE102004017686A1 (en) 2004-04-10 2005-11-03 Trilux-Lenze Gmbh + Co Kg Ergonomic ceiling light
US7246924B2 (en) * 2004-11-22 2007-07-24 Sylvan R. Shemitz Designs, Inc. High performance lighting louvers and luminaires
US7360929B2 (en) * 2005-04-15 2008-04-22 Sylvan R. Shemitz Designs, Inc. Luminaire with multi-purpose mounting feature
US20100238661A1 (en) * 2009-03-20 2010-09-23 Sylvan R. Shemitz Designs Incorporated Asymmetrical light producing baffle and luminaire inclusive thereof

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Also Published As

Publication number Publication date
US4621309A (en) 1986-11-04
BR8501487A (en) 1985-11-26
DK143685A (en) 1985-10-01
JPS60246503A (en) 1985-12-06
CA1248929A (en) 1989-01-17
DK143685D0 (en) 1985-03-29
ATE27350T1 (en) 1987-06-15
EP0159534A1 (en) 1985-10-30
DD231839A5 (en) 1986-01-08
NO851176L (en) 1985-10-01
FI851284L (en) 1985-10-01
DE3412162C1 (en) 1985-08-29
KR850006472A (en) 1985-10-05
AU4070585A (en) 1985-10-03
ZA851681B (en) 1985-10-30
FI851284A0 (en) 1985-03-29

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