EP0535416B1 - Work lighting fixture with at least one fluorescent lamp - Google Patents

Work lighting fixture with at least one fluorescent lamp Download PDF

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Publication number
EP0535416B1
EP0535416B1 EP92115462A EP92115462A EP0535416B1 EP 0535416 B1 EP0535416 B1 EP 0535416B1 EP 92115462 A EP92115462 A EP 92115462A EP 92115462 A EP92115462 A EP 92115462A EP 0535416 B1 EP0535416 B1 EP 0535416B1
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EP
European Patent Office
Prior art keywords
lighting fixture
reflector
light
fixture
glass
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 - Lifetime
Application number
EP92115462A
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German (de)
French (fr)
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EP0535416A1 (en
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.)
Thorn Licht GmbH
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Thorn Licht GmbH
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Classifications

    • 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
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F21S8/06—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures by suspension
    • 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
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • 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
    • 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
    • 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
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/37—U-shaped
    • 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
    • F21Y2113/00—Combination of light sources

Definitions

  • the present invention relates to a workplace lamp.
  • DE-OS 33 01 277 describes a workplace lamp in which an exit opening is provided in the central region of the housing, from which light rays emerge towards the top and are thrown onto the ceiling, so that these light rays cause indirect diffuse illumination which brightens the surroundings .
  • this luminaire two light exit openings spaced apart from one another in the longitudinal direction of the housing are also provided, which are open toward the underside of the luminaire.
  • These light exit openings on the underside of the luminaire have light-guiding elements, for example in the form of a grid, which essentially direct light from the two spaced-apart light exit openings in the end regions of the luminaire downward and towards one another Let it come out so that the workplace is illuminated by light coming in at an angle from the sides.
  • a workplace lamp with the features of the preamble of claim 1 is known from GB-A-2 149 079.
  • the present invention has for its object to provide a luminaire of the type mentioned, in which the workplace is illuminated glare-free by indirect light, the lighting at the workplace producing good shadows and good contrasts (comparatively high CRF values).
  • the glass reflector is slightly concave and parabolic or curved in a circular shape and exceeds its width to the right and to the left towards the width of the lamp housing arranged below it, so that the light reflected by the glass reflector directed on both long sides past the lamp housing down to two Working areas of two frontally adjacent workplaces fall where two people can sit opposite each other.
  • the proportion of light that passes through the glass reflector upwards and is radiated towards the ceiling and the proportion of light that goes down from the glass reflector reflected, can be varied by selecting the glass used.
  • Glass types are known which, for example, have a surface reflection of the order of about 10%.
  • the proportion of surface reflection can, however, be chosen to be lower or significantly higher by choosing other glasses.
  • Polarized glass can also be used.
  • the indirect light which is reflected downwards by the glass reflector, comes from a left outer luminaire section and a right outer luminaire section and thus falls predominantly from oblique lateral directions onto the illuminated work area or areas, while no light is generated in a central luminaire section.
  • This middle luminaire section merely forms the mechanical connection between the two outer luminaire sections.
  • light generated by the lamps in the two outer lamp sections falls on the glass reflector, which preferably extends over the entire length of the lamp and the portion of this light reflected on the glass reflector also emerges downwards in the middle section of the lamp and contributes to illuminating the lamp or the fields of work at.
  • the light portion reflected by the glass reflector produces good shading and good contrast in the area of the work area or areas, so that the luminaire has relatively high CRF values, while at the same time glare-free illumination of the work area or areas.
  • the luminaire thus meets the high requirements of workplace lighting for certain professional groups such as graphic designers.
  • a direct light emission downwards is not provided.
  • Light rays 37, 38 emerge from the fluorescent lamps 30, 31 directly upwards and strike the upper reflector 11, which is curved with a relatively large radius of curvature. That part of the light which passes through the glass reflector 11 (see beam 37a shown in dashed lines) is emitted towards the ceiling and reflected from there, so that this light component contributes to the diffuse ambient light. A portion of the light that strikes the glass reflector 11 is reflected due to the reflection on its shiny surface and is thus emitted downwards in the direction of the work table. This is illustrated by way of example using the reflected rays 37, 37b and 38, 38b.
  • connection of the two outer lamp halves 14, 16 can, for example, via the in the corners of the housing 12th
  • tubes 32, 33 are arranged, which can extend in the longitudinal direction through the housing 12 of the left lamp part 14 and into the housing of the other lamp part 16 (see also reference number 15 in FIG. 1 ).
  • the glass reflector can be fixed with adjusting rings 35, 36, with the tubes 39, 40 which continue in the tubes 17 above the glass reflector 11 also suspending the lamp as a whole from the ceiling can be.
  • the lamp is designed in such a way that a diffuse light component that is emitted towards the ceiling is combined with a light component that is reflected on the glass reflector 11 and directed light, whereby the latter light component produces better shade and thus better contrasts, that is to say higher CRF values at the workplace.
  • the working area 29 is illuminated only with indirect light, which mainly falls from the lateral lighting parts 14, 16 onto the working area from a lateral direction.
  • the lamp 10 according to the invention has a relatively wide beam due to the glass reflector 11 lying above the housing 12, 13. The beams 24a, 27a and 25a, 26a reflected by the latter (see FIG.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

The present invention relates to a work lighting fixture (10) with at least one fluorescent lamp which can be suspended at a distance from the ceiling above the workplace, with which fixture at least a part of the light emerges at the top of the lighting fixture and in which light emerges from two fixture portions which are spaced from one another in the longitudinal direction of the housing. The fixture is, according to the invention, characterised in that the emergence of direct light takes place exclusively towards the top of the fixture and a glass reflector (11) is disposed at a spacing above the housing (12, 13) of the fixture, by means of which reflector a part of the light flux emerging in an upward direction from the fixture is reflected downwards in a direction towards the workplace (28). With the work lighting fixture according to the invention, a glare-free illumination of the workplace or workplaces is achieved, good shading characteristics and good contrast levels being attained at the same time. <IMAGE>

Description

Die vorliegende Erfindung betrifft eine Arbeitsplatzleuchte.The present invention relates to a workplace lamp.

In der DE-OS 33 01 277 wird eine Arbeitsplatzleuchte beschrieben, bei der im Mittelbereich des Gehäuses eine Austrittsöffnung vorgesehen ist, aus der Lichtstrahlen zur Oberseite hin austreten und an die Raumdecke geworfen werden, so daß diese Lichtstrahlen eine die Umgebung aufhellende indirekte diffuse Beleuchtung bewirken. Bei dieser Leuchte sind weiterhin zwei voneinander in Längsrichtung des Gehäuses distanzierte Lichtaustrittsöffnungen vorgesehen, die zur Unterseite der Leuchte hin geöffnet sind. Diese Lichtaustrittsöffnungen an der Unterseite der Leuchte weisen Lichtleitelemente, zum Beispiel in Form eines Rasters auf, die im wesentlichen direktes Licht aus den beiden mit Abstand voneinander angeordneten Lichtaustrittsöffnungen in den endseitigen Bereichen der Leuchte nach unten und gegeneinander gerichtet austreten lassen, so daß der Arbeitsplatz durch schräg von den Seiten her einfallendes Licht beleuchtet wird.DE-OS 33 01 277 describes a workplace lamp in which an exit opening is provided in the central region of the housing, from which light rays emerge towards the top and are thrown onto the ceiling, so that these light rays cause indirect diffuse illumination which brightens the surroundings . In this luminaire, two light exit openings spaced apart from one another in the longitudinal direction of the housing are also provided, which are open toward the underside of the luminaire. These light exit openings on the underside of the luminaire have light-guiding elements, for example in the form of a grid, which essentially direct light from the two spaced-apart light exit openings in the end regions of the luminaire downward and towards one another Let it come out so that the workplace is illuminated by light coming in at an angle from the sides.

Eine Arbeitsplatzleuchte mit den Merkmalen des Oberbegriffs des Anspruches 1 ist aus GB-A-2 149 079 bekannt.A workplace lamp with the features of the preamble of claim 1 is known from GB-A-2 149 079.

Der vorliegenden, Erfindung liegt die Aufgabe zugrunde, eine Leuchte der eingangs genannten Gattung zu schaffen, bei der der Arbeitsplatz blendfrei durch indirektes Licht beleuchtet wird, wobei die Beleuchtung am Arbeitsplatz eine gute Schattigkeit und gute Kontraste (vergleichsweise hohe CRF-Werte) erzeugt.The present invention has for its object to provide a luminaire of the type mentioned, in which the workplace is illuminated glare-free by indirect light, the lighting at the workplace producing good shadows and good contrasts (comparatively high CRF values).

Zur Lösung dieser Aufgabe dienen die in Anspruch 1 genannten Merkmale. Bei dieser erfindungsgemäßen Arbeitsplatzleuchte tritt Licht direkt ausschließlich zur Oberseite der Leuchte hin aus, wobei neben dem an die Raumdecke geworfenen Lichtanteil, der die die Umgebung aufhellende indirekte diffuse Beleuchtung bewirkt, ein weiterer indirekter Lichtanteil dadurch erzeugt wird, daß Licht, das aus den Lichtaustrittsöffnungen nach oben austritt, an einem mit Abstand über dem Leuchtengehäuse angeordneten Glasreflektor nach unten reflektiert wird, der breiter ist, als das unter diesem angeordnete Leuchtengehäuse und der das Licht so lenkt, daß es überwiegend auf ein etwa in Schreibtischmitte liegendes, vor der am Schreibtisch sitzenden Person angeordnetes Arbeitsfeld fällt. Vorzugsweise ist der Glasreflektor schwach konkav und zwar parabolisch oder kreisbogenförmig gekrümmt ausgebildet und übersteigt seine Breite nach rechts und nach links hin die Breite des unter diesem angeordneten Leuchtengehäuses, so daß das von dem Glasreflektor reflektierte Licht gerichtet an beiden Längsseiten am Leuchtengehäuse vorbei nach unten auf zwei Arbeitsfelder zweier frontal aneinandergrenzender Arbeitsplätze fällt, an denen zwei Personen sich gegenüber sitzen können.The features mentioned in claim 1 serve to achieve this object. In this workplace luminaire according to the invention, light emerges directly only towards the top of the luminaire, and in addition to the light component thrown onto the ceiling, which causes the indirect diffuse lighting that brightens the surroundings, a further indirect light component is generated by the fact that light emerging from the light exit openings emerges at the top, is reflected downwards by a glass reflector arranged at a distance above the lamp housing, which is wider than the lamp housing arranged below it and which directs the light so that it predominantly points to a person lying in the middle of the desk in front of the person sitting at the desk arranged work area falls. Preferably, the glass reflector is slightly concave and parabolic or curved in a circular shape and exceeds its width to the right and to the left towards the width of the lamp housing arranged below it, so that the light reflected by the glass reflector directed on both long sides past the lamp housing down to two Working areas of two frontally adjacent workplaces fall where two people can sit opposite each other.

Der Anteil des Lichts, das durch den Glasreflektor nach oben hin hindurchtritt und zur Raumdecke hin abgestrahlt wird und der Anteil des Lichts, der vom Glasreflektor nach unten hin reflektiert wird, kann durch Auswahl des verwendeten Glases variiert werden. Es sind Glassorten bekannt, die beispielsweise eine Oberflächenreflexion in der Größenordnung von etwa 10 % haben. Der Anteil der Oberflächenreflexion kann aber durch Wahl anderer Gläser niedriger oder auch wesentlich höher gewählt werden. Ebensogut kann man auch polarisiertes Glas einsetzen.The proportion of light that passes through the glass reflector upwards and is radiated towards the ceiling and the proportion of light that goes down from the glass reflector reflected, can be varied by selecting the glass used. Glass types are known which, for example, have a surface reflection of the order of about 10%. The proportion of surface reflection can, however, be chosen to be lower or significantly higher by choosing other glasses. Polarized glass can also be used.

Das indirekte Licht, das von dem Glasreflektor nach unten reflektiert wird, kommt aus einem linken äußeren Leuchtenabschnitt und einem rechten äußeren Leuchtenabschnitt und fällt dadurch überwiegend aus schrägen seitlichen Richtungen auf das oder die beleuchteten Arbeitsfelder, während in einem mittleren Leuchtenabschnitt kein Licht erzeugt wird. Dieser mittlere Leuchtenabschnitt bildet lediglich die mechanische Verbindung der beiden äußeren Leuchtenabschnitte. Jedoch fällt von den Lampen in den beiden äußeren Leuchtenabschnitten erzeugtes Licht auf den Glasreflektor, der sich vorzugsweise über die gesamte Länge der Leuchte erstreckt und der am Glasreflektor reflektierte Anteil dieses Lichts tritt auch im mittleren Abschnitt der Leuchte nach unten hin aus und trägt zur Beleuchtung des oder der Arbeitsfelder bei. Der von dem Glasreflektor gespiegelte Lichtanteil erzeugt im Bereich des oder der Arbeitsfelder eine gute Schattigkeit und gute Kontraste, so daß die Leuchte relativ hohe CRF-Werte aufweist, bei gleichzeitig blendfreier Ausleuchtung des oder der Arbeitsplätze. Die Leuchte wird somit den hohen Anforderungen der Arbeitsplatzbeleuchtung für bestimmte Berufsgruppen wie zum Beispiel Grafiker gerecht.The indirect light, which is reflected downwards by the glass reflector, comes from a left outer luminaire section and a right outer luminaire section and thus falls predominantly from oblique lateral directions onto the illuminated work area or areas, while no light is generated in a central luminaire section. This middle luminaire section merely forms the mechanical connection between the two outer luminaire sections. However, light generated by the lamps in the two outer lamp sections falls on the glass reflector, which preferably extends over the entire length of the lamp and the portion of this light reflected on the glass reflector also emerges downwards in the middle section of the lamp and contributes to illuminating the lamp or the fields of work at. The light portion reflected by the glass reflector produces good shading and good contrast in the area of the work area or areas, so that the luminaire has relatively high CRF values, while at the same time glare-free illumination of the work area or areas. The luminaire thus meets the high requirements of workplace lighting for certain professional groups such as graphic designers.

Im folgenden wird die vorliegende Erfindung anhand eines Ausführungsbeispiels unter Bezugnahme auf die beiliegenden Zeichnungen näher beschrieben. Dabei zeigen

Fig. 1
eine schematisch vereinfachte Seitenansicht einer erfindungsgemäßen Leuchte
Fig. 2
eine schematisch vereinfachte Ansicht der Leuchte in Richtung des Pfeils II von Fig. 1 gesehen
Fig. 3
einen vergrößerten Querschnitt durch eine erfindungsgemäße Leuchte

Zunächst wird auf Fig. 1 und 2 Bezug genommen. Die Darstellung zeigt eine langgestreckte erfindungsgemäße Leuchte 10, die an einer Decke mittels Aufhängungen 17 über einem Arbeitstisch 28 in Längsrichtung aufgehängt ist. Die Leuchte 10 ist in Längsrichtung gesehen im Prinzip 3-teilig aufgebaut. Sie besteht aus einem linken Leuchtenteil 14, in dem Leuchtstofflampen angeordnet sind (in der Zeichnung nicht dargestellt), einem rechten Leuchtenteil 16, in dem ebenfalls Leuchtstofflampen in Längsrichtung angeordnet sind (nicht dargestellt) und einem Mittelteil 15, der den linken Leuchtenteil 14 und den rechten Leuchtenteil 16 mechanisch miteinander verbindet. In dem Mittelteil 15 sind keine Lampen angeordnet. Dieser kann beispielsweise aus ein oder mehreren Verbindungsstangen oder Rohren bestehen. Wie aus Fig. 1 ersichtlich ist, ist die Leuchte in Längsrichtung über dem Arbeitstisch 28 so aufgehängt, daß sich der Mittelteil 15 in Höhe des auszuleuchtenden Arbeitsfeldes 29 befindet. Die beiden äußeren Leuchtenteile 14 und 16 weisen jeweils ein langgestrecktes zur Unterseite hin geschlossenes und in der Seitenansicht in den äußeren Bereichen etwa schalenförmiges Gehäuse 12 auf, das an der Unterseite in seinem mittleren Bereich 13 spitzwinklig ausgeformt ist. Die Form des Gehäuses 12, 13 ist aus Fig. 3 etwas deutlicher erkennbar. Durch die spitze winkelförmige Ausbuchtung 13 des Gehäuses in der Mitte wird im Gehäuse ein Raum geschaffen, der geeignet ist, ein Vorschaltgerät 34 für den Betrieb der Leuchtstofflampen 30, 31 aufzunehmen. Wie aus Fig. 3 weiterhin erkennbar ist, nimmt das Gehäuse 12, 13 des jeweiligen äußeren Leuchtenteils 14, 16 neben dem Vorschaltgerät jeweils zwei nebeneinanderliegende Reflektoren 18, 19 auf, in denen in Längsrichtung die Leuchtstofflampen 30, 31 angeordnet sind.The present invention is described in more detail below using an exemplary embodiment and with reference to the accompanying drawings. Show
Fig. 1
a schematically simplified side view of a lamp according to the invention
Fig. 2
seen a schematically simplified view of the lamp in the direction of arrow II of FIG. 1
Fig. 3
an enlarged cross section through a lamp according to the invention

First, reference is made to FIGS. 1 and 2. The illustration shows an elongated lamp 10 according to the invention, which is suspended from a ceiling in the longitudinal direction by means of suspensions 17 above a work table 28. The lamp 10 is constructed in principle in three parts when viewed in the longitudinal direction. It consists of a left-hand lamp part 14, in which fluorescent lamps are arranged (not shown in the drawing), a right-hand lamp part 16, in which fluorescent lamps are also arranged in the longitudinal direction (not shown), and a middle part 15, which is the left-hand lamp part 14 and right lamp part 16 mechanically connects. No lamps are arranged in the middle part 15. This can consist, for example, of one or more connecting rods or tubes. As can be seen from Fig. 1, the lamp is suspended in the longitudinal direction above the work table 28 so that the central part 15 is at the level of the work area 29 to be illuminated. The two outer lamp parts 14 and 16 each have an elongated housing 12 which is closed towards the underside and, in the side view, approximately shell-shaped in the outer regions and which is formed at an acute angle on the underside in its central region 13. The shape of the housing 12, 13 is from FIG. 3 somewhat more clearly recognizable. The pointed angular bulge 13 of the housing in the middle creates a space in the housing which is suitable for accommodating a ballast 34 for operating the fluorescent lamps 30, 31. As can also be seen from FIG. 3, the housing 12, 13 of the respective outer lighting part 14, 16 accommodates two adjacent reflectors 18, 19 in addition to the ballast, in which the fluorescent lamps 30, 31 are arranged in the longitudinal direction.

Ein direkter Lichtaustritt nach unten hin ist nicht vorgesehen. Von den Leuchtstofflampen 30, 31 treten Lichtstrahlen 37, 38 direkt nach oben hin aus und treffen auf den oberen Reflektor 11 auf, der gekrümmt ist mit einem relativ großen Krümmungsradius. Derjenige Teil des Lichts, der durch den Glasreflektor 11 hindurchtritt (siehe gestrichelt dargestellter Strahl 37a) wird zur Raumdecke hin abgestrahlt und von dort reflektiert, so daß dieser Lichtanteil zum diffusen Raumlicht beiträgt. Ein Teil des Lichts, das auf den Glasreflektor 11 auftrifft, wird aufgrund der Spiegelung an dessen glänzender Oberfläche reflektiert und damit nach unten in Richtung auf den Arbeitstisch abgestrahlt. Exemplarisch ist dies anhand der reflektierten Strahlen 37, 37b bzw. 38, 38b dargestellt. Bei Strahlen, die unter einem Winkel auf den Glasreflektor 11 auftreffen, der flacher ist, ist der durch Oberflächenreflexion gespiegelte Lichtanteil etwas höher und der zur Decke abgestrahlte Anteil etwas geringer. Ein Teil des von den Leuchtstofflampen 30, 31 abgestrahlten Lichts trifft zunächst auf den Reflektor 18, 19, wird von diesem nach oben reflektiert und dann wiederum von dem Glasreflektor 11 teils durchgelassen und teils reflektiert, in analoger Weise wie dies zuvor für den Lichtanteil beschrieben wurde, der direkt von der Leuchtstofflampe auf den Glasreflektor 11 fällt.A direct light emission downwards is not provided. Light rays 37, 38 emerge from the fluorescent lamps 30, 31 directly upwards and strike the upper reflector 11, which is curved with a relatively large radius of curvature. That part of the light which passes through the glass reflector 11 (see beam 37a shown in dashed lines) is emitted towards the ceiling and reflected from there, so that this light component contributes to the diffuse ambient light. A portion of the light that strikes the glass reflector 11 is reflected due to the reflection on its shiny surface and is thus emitted downwards in the direction of the work table. This is illustrated by way of example using the reflected rays 37, 37b and 38, 38b. In the case of rays which strike the glass reflector 11 at an angle which is flatter, the proportion of light reflected by surface reflection is somewhat higher and the proportion emitted to the ceiling is somewhat lower. A portion of the light emitted by the fluorescent lamps 30, 31 first strikes the reflector 18, 19, is reflected upward by this and then again partially transmitted and partially reflected by the glass reflector 11, in an analogous manner to that described above for the light portion that falls directly from the fluorescent lamp onto the glass reflector 11.

Die Verbindung der beiden äußeren Leuchtenhälften 14, 16 kann zum Beispiel über die in den Ecken des Gehäuses 12 neben der Wand des Reflektors 18, 19 jeweils angeordneten Rohre 32, 33 vorgenommen werden, die sich in Längsrichtung jeweils durch das Gehäuse 12 des linken Leuchtenteils 14 und bis in das Gehäuse des anderen Leuchtenteils 16 erstrecken können (siehe auch Bezugszeichen 15 in Fig. 1).The connection of the two outer lamp halves 14, 16 can, for example, via the in the corners of the housing 12th In addition to the wall of the reflector 18, 19, tubes 32, 33 are arranged, which can extend in the longitudinal direction through the housing 12 of the left lamp part 14 and into the housing of the other lamp part 16 (see also reference number 15 in FIG. 1 ).

An der Aufhängung 39, 40 die das Gehäuse 12 trägt, kann mit Stellringen 35, 36 der Glasreflektor festgelegt sein, wobei über die Rohre 39, 40, die sich in den Rohren 17 oberhalb des Glasreflektors 11 fortsetzen auch die Leuchte insgesamt an der Decke aufgehängt werden kann.On the suspension 39, 40 which supports the housing 12, the glass reflector can be fixed with adjusting rings 35, 36, with the tubes 39, 40 which continue in the tubes 17 above the glass reflector 11 also suspending the lamp as a whole from the ceiling can be.

Die Leuchte ist so konzipiert, daß ein zur Decke hin abgestrahlter diffuser Lichtanteil mit einem Lichtanteil am Glasreflektor 11 reflektierten gelenkten Lichts kombiniert wird, wobei durch letzteren Lichtanteil bessere Schattigkeit und damit bessere Kontraste, das heißt höhere CRF-Werte am Arbeitsplatz erzeugt werden. Wie aus Fig. 1 ersichtlich ist, wird das Arbeitsfeld 29 nur mit indirektem Licht beleuchtet, das von den äußeren Leuchtenteilen 14, 16 überwiegend aus seitlicher Richtung auf das Arbeitsfeld fällt. Die erfindungsgemäße Leuchte 10 ist relativ breitstrahlend aufgrund des über dem Gehäuse 12, 13 liegenden Glasreflektors 11. Die von diesem reflektierten Strahlen 24a, 27a bzw. 25a, 26a (siehe Fig. 2) werden so gelenkt, daß zwei Zonen höherer Leuchtdichte auf dem Arbeitstisch 28 erzeugt werden, die sich seitlich neben dieser parallel zur Leuchte in Längsrichtung erstrecken, während direkt unter dem Leuchtengehäuse 12 sich eine Zone geringerer Leuchtdichte befindet. Im mittleren Abschnitt 15 kann Licht, das in den beiden äußeren Abschnitten 14, 16 erzeugt und vom Glasreflektor 11 reflektiert wird, ebenfalls nach unten hin austreten, wobei dieses Licht jedoch keine senkrechten Anteile enthält. Mittels dieser Anordnung können zwei Arbeitsplätze zweier sich gegenübersitzender Personen mit aneinandergrenzenden Arbeitstischen kontrastreich ausgeleuchtet werden.The lamp is designed in such a way that a diffuse light component that is emitted towards the ceiling is combined with a light component that is reflected on the glass reflector 11 and directed light, whereby the latter light component produces better shade and thus better contrasts, that is to say higher CRF values at the workplace. As can be seen from FIG. 1, the working area 29 is illuminated only with indirect light, which mainly falls from the lateral lighting parts 14, 16 onto the working area from a lateral direction. The lamp 10 according to the invention has a relatively wide beam due to the glass reflector 11 lying above the housing 12, 13. The beams 24a, 27a and 25a, 26a reflected by the latter (see FIG. 2) are directed such that two zones of higher luminance are located on the work table 28 are generated, which extend laterally next to this parallel to the lamp in the longitudinal direction, while directly below the lamp housing 12 is a zone of lower luminance. In the central section 15, light which is generated in the two outer sections 14, 16 and is reflected by the glass reflector 11 can also exit downwards, but this light does not contain any vertical components. With this arrangement, two workplaces of two people sitting opposite each other can be illuminated with contrasting work tables.

Claims (5)

  1. Work lighting fixture with at least one fluorescent lamp which is suspendable with a distance from the ceiling above the working site and in which the emission of direct light exclusively takes place towards the upper side of the lighting fixture,
    with an elongated housing (12) open towards the top and cup-shaped in cross section and with a reflector arranged with a distance above the housing (12, 13) by means of which the light emerging upwardly from the lighting fixture is reflected downwardly in the direction towards the working site (28),
    the reflector (11) projects beyond both sides of the housing (12, 13) in the width
    and the reflector comprises a curvature transversely to the longitudinal axis of the lighting fixture,
    characterised in that the work lighting fixture consists of a left lighting fixture part (14) in which the fluorescent lamps are arranged, a right lighting fixture part (16) in which likewise fluorescent lamps are arranged, and a central part (15) mechanically connecting the left lighting fixture part (14) and the right lighting fixture part (16) in which no fluorescent lamps are arranged,
    and that the reflector (11) is a glass reflector through which a part of the light emerges so that it shines towards the ceiling of the room, whereas a part of the light striking the glass reflector (11) is reflected due to the reflexions at its surface and is turned downwardly towards the working site.
  2. Work lighting fixture as claimed in claim 1, characterised in that the two outer lighting fixture parts (14, 16) arranged at a distance from one another are mechanically connected by means of rods or pipes (20) forming the central lighting fixture part (15).
  3. Work lighting fixture as claimed in claim 1 or 2, characterised in that the glass reflector (11) extends in the longitudinal direction over all three lighting fixture parts (14, 15, 16).
  4. Work lighting fixture as claimed in any one of claims 1 to 3, characterised in that the glass reflector (11) comprises, transversely to the longitudinal axis of the lighting fixture, a slightly concave, preferably parabolic or circular curvature directed upwardly.
  5. Work lighting fixture as claimed in any one of claims 1 to 4, characterised in that the glass reflector (11) consists of a kind of glass with a surface reflexion in the amount of about 10 % or of a polarized glass.
EP92115462A 1991-10-01 1992-09-10 Work lighting fixture with at least one fluorescent lamp Expired - Lifetime EP0535416B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4132678A DE4132678A1 (en) 1991-10-01 1991-10-01 WORKPLACE LAMP WITH AT LEAST ONE FLUORESCENT LAMP
DE4132678 1991-10-01

Publications (2)

Publication Number Publication Date
EP0535416A1 EP0535416A1 (en) 1993-04-07
EP0535416B1 true EP0535416B1 (en) 1995-03-15

Family

ID=6441908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92115462A Expired - Lifetime EP0535416B1 (en) 1991-10-01 1992-09-10 Work lighting fixture with at least one fluorescent lamp

Country Status (5)

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US (1) US5272607A (en)
EP (1) EP0535416B1 (en)
JP (1) JPH05205508A (en)
AT (1) ATE119983T1 (en)
DE (2) DE4132678A1 (en)

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DE4429888C3 (en) * 1994-08-24 2003-11-27 Helmut Koester Lamps reflector ceiling unit
CA2175554C (en) * 1996-05-01 2000-07-11 Dean Grierson Indirect asymmetric luminaire assembly
IT1315564B1 (en) 2000-12-12 2003-02-18 Marvon Srl INTUMESCENT GASKET REINFORCED
US7387408B2 (en) 2002-04-18 2008-06-17 Koninklijke Philips Electronics, N.V. Luminaire featuring light-transmitting counter reflector cover
US6871993B2 (en) * 2002-07-01 2005-03-29 Accu-Sort Systems, Inc. Integrating LED illumination system for machine vision systems
US8522494B2 (en) * 2004-03-11 2013-09-03 Barco, Inc. System for creating a tensioned wall composed of individual LED tiles
US8523389B2 (en) * 2007-12-18 2013-09-03 Koninklijke Philips N.V. Illumination system with inclined light source
US8002446B1 (en) 2008-06-09 2011-08-23 Koninklijke Philips Electronics N.V. Virtual direct and indirect suspended lighting fixture
US7950833B1 (en) 2008-06-17 2011-05-31 Genlyte Thomas Group Llc Splay frame luminaire
US8282248B1 (en) 2008-12-03 2012-10-09 Koninklijke Philips Electronics N.V. Luminaire including upper and lower dome-shaped optical elements
CN103185263A (en) * 2011-12-30 2013-07-03 北京谊安医疗系统股份有限公司 Environment lighting lamp device for medical suspension bridge
CN103591508B (en) * 2013-10-23 2016-04-27 中国中元国际工程有限公司 Have the station lighting of ambient lighting concurrently
WO2016019288A1 (en) * 2014-08-01 2016-02-04 Smart Billiard Lighting LLC Billiard table lighting and game play monitor
US9827483B2 (en) 2014-08-01 2017-11-28 Smart Billiard Lighting LLC Billiard table lighting and game play monitor
USD835652S1 (en) 2015-12-10 2018-12-11 Smart Billiard Lighting LLC Display screen with transitional graphical user interface of a billiard game
JP6873730B2 (en) * 2016-02-17 2021-05-19 スマート ビリヤード ライティング エルエルシー Billiard table lighting and gameplay monitor

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Also Published As

Publication number Publication date
JPH05205508A (en) 1993-08-13
DE4132678A1 (en) 1993-04-08
ATE119983T1 (en) 1995-04-15
US5272607A (en) 1993-12-21
DE59201657D1 (en) 1995-04-20
EP0535416A1 (en) 1993-04-07

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