EP0768492B1 - Indirect wide beam luminaire - Google Patents

Indirect wide beam luminaire Download PDF

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Publication number
EP0768492B1
EP0768492B1 EP96114285A EP96114285A EP0768492B1 EP 0768492 B1 EP0768492 B1 EP 0768492B1 EP 96114285 A EP96114285 A EP 96114285A EP 96114285 A EP96114285 A EP 96114285A EP 0768492 B1 EP0768492 B1 EP 0768492B1
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EP
European Patent Office
Prior art keywords
luminaire
centre plane
indirect
housing
luminaire housing
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
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EP96114285A
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German (de)
French (fr)
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EP0768492A1 (en
Inventor
Gerhard Waldmann
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Herbert Waldmann GmbH and Co KG
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Herbert Waldmann GmbH and Co KG
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Publication of EP0768492A1 publication Critical patent/EP0768492A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S6/00—Lighting devices intended to be free-standing
    • F21S6/005—Lighting devices intended to be free-standing with a lamp housing maintained at a distance from the floor or ground via a support, e.g. standing lamp for ambient lighting
    • 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
    • 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
    • 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
    • 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 wide-beam indirect light according to the preamble of claim 1.
  • the invention is a luminaire of the aforementioned Art be improved so that on the one hand too strong Luminance on the ceiling immediately above the luminaire on the other hand, the greater part of the radiated light sideways and obliquely upward is radiated to a good and uniform illumination to achieve the space.
  • additional reflector becomes a part of the inside directed light emission of the fluorescent tubes upwards deflected, resulting in a more uniform illumination of the located directly above the luminaire housing Ceiling area is reached.
  • Luminaire housing 14 Since the distance A from the ceiling 10 to the lower edge 12 of Luminaire housing 14 according to Figure 1 from the above The reasons should be as small as possible, this is proportionate flat luminaire housing 14 by means of a short lamp shaft 16 and an approximately conical ceiling rosette 18 in short distance from the ceiling 10 attached.
  • the lower part 20 the lamp housing 14 is curved slightly convex downward and is made of opaque material, however e.g. in the form of a perforated plate or by means of other breakthroughs Optionally let more or less light down can.
  • each in upwardly bent portions 22nd At the upper ends of the obliquely upwards and inwards Sections 22 may be a well-translucent top Connect 24 of the light housing 14 in an advantageous manner.
  • the luminaire housing 14 is symmetrical to one in the direction the longitudinal extension of the lamp housing 14 extending vertical center plane 26 is formed. At equal intervals from the median plane 26 and at the same height above the Lower part 20, i. approximately at the height of the bent sections 22 of the lamp housing 14, one is parallel to the Midplane 26 extending arc tube 28 is arranged. Above each arc tube is each a substantially strip-shaped, flat down concave curved reflector 30 attached, the lower edge at a location 32 at the top Half of the luminous tube circumference approximately rests or in low Distance from the same is arranged. In the illustrated Embodiment is this point 32 from the apex line 34th each arc tube 28 shifted to the center plane 26 out.
  • each reflector 30 On his remote from the respective associated arc tube 28 At the end, each reflector 30 has a stiffener in it Serving in the longitudinal direction, pointing obliquely outwards and downwards Bend 36 on.
  • the relatively flat reflectors 30 are upwardly and inwardly, i. towards the median plane 26, slightly convex and slightly concave curved outwards and downwards.
  • each inclined obliquely upwards and inwards level reflector surface 40 forms, with the respective opposite reflector 30 an upwardly flared includes acute angle. This angle goes here from the mean inclination of the vertical section of the reflector 30 regardless of its curvature. Every level Reflector surface 40 has at its lower edge to the Center plane 26 pointing towards bending 42.
  • Each reflector 30 serves essentially to that of the Incandescent tube 28 outgoing light for the most part in one indicated by dashed lines, obliquely laterally to direct the above-pointing angle range B.
  • the lower limit 44 of the angular range B is thereby through the upper edge of the bent portion 22 determines while the upper limit 46 is determined by the outer edge of the bend 36.
  • the outer boundary 48 of the angular range C is determined by the convexly curved inner side of the reflector 30, while the outer limit 50 is determined by the reflection surface 40 of the reflector 38.
  • the remaining light of the fluorescent tubes 28 goes down the inner surface of the lower part 20 of the lamp housing 14. Es is reflected from here also partly upwards and on the other hand, to a small extent, down, e.g. through holes in a perforated plate or the like, from.
  • the bends 42 of the central auxiliary reflector 38 are used for more uniform lightening of the lower part 20 to one to achieve uniform brightness effect, if one uses the Luminaire viewed from below.
  • the lamp shown in Figure 1 is in its short Suspension on the ceiling 10 in approximate relation to Room height shown, while in Figure 3 in their arrangement on a standing on the floor 13 high stand 17 with Stand 15 is shown.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Luminescent Compositions (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Laser Surgery Devices (AREA)
  • Colloid Chemistry (AREA)

Abstract

The lamp unit has an elongate lamp housing (14) which is symmetrical to its vertical longitudinal centre plane (26), which screens the greater part of the downwards directed light. A pair of light tubes (28) lie on either side of the vertical longitudinal centre plane, with associated reflectors (30) angled upwards relative to the centre plane from a point (32) in the upper half of the light tube periphery. Pref. each reflector has a convex curvature on the side facing the vertical centre plane and a concave curvature on the side facing the light tube, with a lipped top edge (36) bent in the direction of the light tube.

Description

Die Erfindung betrifft eine breitstrahlende Indirektleuchte nach dem Oberbegriff des Anspruchs 1.The invention relates to a wide-beam indirect light according to the preamble of claim 1.

Bei einer sogenannten kurz abgehängten Leuchte muß der Abstand zwischen Decke und Unterkante der Leuchte möglichst klein sein. Solche Leuchten werden in Räumen mit einer Bauhöhe von weniger als 2,5 m benötigt. Es besteht hierbei das Problem, dass unter der Leuchte eine freie Durchgangshöhe von etwa 2,2m erforderlich ist. Wenn man nun die Leuchte entsprechend kurz abhängt, ist eine hohe Leuchtdichte an der Decke zu erwarten, was für die Beleuchtung unzweckmäßig ist. Auch bei Ständerleuchten mit sehr hohem Ständer tritt dieses Problem auf, wenn sich die Leuchte selbst nahe der Decke befindet.In a so-called short-hanging lamp, the distance as small as possible between the ceiling and the lower edge of the luminaire his. Such luminaires are used in rooms with a height of less than 2.5 m needed. There is the problem here that under the lamp a free passage height of about 2.2m is required. If you now the lamp accordingly short depends on a high luminance on the ceiling, which is inconvenient for the lighting. Also at Stand lights with a very high stand occurs this problem when the light itself is near the ceiling.

Obwohl zahlreiche Leuchten dieser Art, auch mit unterschiedlich geformten Reflektoren, bekannt sind, z.B. aus den DE-GM 74 14 939 und 89 08 742 sowie der CH-PS 193 757, ist das erwähnte Problem noch nicht zufriedenstellend gelöst worden. Dies gilt auch für die aus DE-GM 7 414 939 bekannte Leuchte der eingangs genannten Art, bei der unterhalb jeder Leuchtstoffröhre ein das Licht derselben nach oben abstrahlender Reflektor vorgesehen ist. Although numerous lights of this kind, even with different shaped reflectors, are known, e.g. from the DE-GM 74 14 939 and 89 08 742 and CH-PS 193 757, is the mentioned problem has not been solved satisfactorily. This also applies to the known from DE-GM 7 414 939 lamp of the type mentioned above, below each Fluorescent tube, the light of the same upward radiating Reflector is provided.

Aus US 5 075 827 ist eine Indirektleuchte bekannt, deren Reflektor die Leuchtstoffröhre nach oben und unten sowie zur Mittelebene der Leuchte hin geschlossen umfaßt, wobei sie einen Abstand von der Leuchtstoffröhre im mehrfachen Abstand dieser Röhre einhält.From US 5,075,827 an indirect light is known, the Reflector the fluorescent tube up and down and to The center plane of the lamp is closed towards, wherein it a distance from the fluorescent tube at multiple intervals this tube complies.

Aus US 4 866 584 ist eine Indirektleuchte bekannt, bei der der Reflektor zwar nach oben und von der Mittelebene der Leuchte weg geneigt verläuft, jedoch ebenfalls einen erheblichen Abstand von etwa dem halben Leuchtstoffröhrendurchmesser vom Umfang derselben einhält.From US 4 866 584 an indirect light is known in which the Although reflector up and from the center plane of the lamp away inclined, but also a considerable Distance of about half the fluorescent tube diameter of Scope of the same complies.

Durch die Erfindung soll eine Leuchte der eingangs genannten Art so verbessert werden, dass einerseits eine zu starke Leuchtdichte an der Decke unmittelbar oberhalb der Leuchte vermieden wird, andererseits der größere Teil des abgestrahlten Lichtes seitlich und schräg nach oben abgestrahlt wird, um eine gute und gleichmäßige Ausleuchtung des Raumes zu erzielen.The invention is a luminaire of the aforementioned Art be improved so that on the one hand too strong Luminance on the ceiling immediately above the luminaire on the other hand, the greater part of the radiated light sideways and obliquely upward is radiated to a good and uniform illumination to achieve the space.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst.This object is achieved by the features of Claim 1 solved.

Durch den gemäß der Erfindung zwischen den beiden Reflektoren angeordneten Zusatzreflektor wird ein Teil der nach innen gerichteten Lichtabstrahlung der Leuchtröhren nach oben abgelenkt, wodurch eine gleichmäßigere Ausleuchtung des unmittelbar oberhalb des Leuchtengehäuses befindlichen Deckenbereichs erreicht wird. By according to the invention between the two reflectors arranged additional reflector becomes a part of the inside directed light emission of the fluorescent tubes upwards deflected, resulting in a more uniform illumination of the located directly above the luminaire housing Ceiling area is reached.

In den Unteransprüchen sind vorteilhafte Ausgestaltungen der Erfindung unter Schutz gestellt.In the dependent claims are advantageous embodiments of Invention under protection.

Anhand der Figuren werden bevorzugte Ausführungsbeispiele der Erfindung näher erläutert. Es zeigt:

Fig.1
einen schematischen Schnitt senkrecht zur Längserstreckung der an einer Raumdecke kurz abgehängten Indirektleuchte gemäß der Erfindung,
Fig.2
eine verkleinerte Darstellung der Leuchte gemäß Fig.1, und
Fig.3
die auf einem hohen Ständer nahe der Raumdecke angebrachte Leuchte gemäß Fig.1 ohne die der Aufhängung dienenden Teile.
Reference to the figures, preferred embodiments of the invention are explained in detail. It shows:
Fig.1
a schematic section perpendicular to the longitudinal extent of the ceiling on a ceiling briefly suspended indirect light according to the invention,
Fig.2
a reduced view of the lamp according to Fig.1, and
Figure 3
the mounted on a high stand near the ceiling lamp according to Figure 1 without the suspension serving parts.

Da der Abstand A von der Raumdecke 10 zur Unterkante 12 des Leuchtengehäuses 14 gemäß Fig.1 aus den oben erläuterten Gründen möglichst klein sein soll, ist das verhältnismäßig flache Leuchtengehäuse 14 mittels eines kurzen Leuchtenschaftes 16 und einer etwa kegelförmigen Deckenrosette 18 in kurzem Abstand von der Decke 10 befestigt. Der Unterteil 20 des Leuchtengehäuses 14 ist nach unten leicht konvex gekrümmt und besteht aus lichtundurchlässigem Material, das jedoch z.B. in Form eines Lochbleches oder mittels anderer Durchbrüche wahlweise mehr oder weniger Licht nach unten durchlassen kann. An den Seitenkanten des Leuchtengehäuses 14 endet der Unterteil 20 jeweils in nach oben umgebogenen Abschnitten 22. An die oberen Enden der schräg nach oben und innen stehenden Abschnitte 22 kann sich ein gut lichtdurchlässiger Oberteil 24 des Leuchtengehäuses 14 in vorteilhafter Weise anschliessen.Since the distance A from the ceiling 10 to the lower edge 12 of Luminaire housing 14 according to Figure 1 from the above The reasons should be as small as possible, this is proportionate flat luminaire housing 14 by means of a short lamp shaft 16 and an approximately conical ceiling rosette 18 in short distance from the ceiling 10 attached. The lower part 20 the lamp housing 14 is curved slightly convex downward and is made of opaque material, however e.g. in the form of a perforated plate or by means of other breakthroughs Optionally let more or less light down can. At the side edges of the lamp housing 14 of the ends Lower part 20 each in upwardly bent portions 22nd At the upper ends of the obliquely upwards and inwards Sections 22 may be a well-translucent top Connect 24 of the light housing 14 in an advantageous manner.

Das Leuchtengehäuse 14 ist symmetrisch zu einer in Richtung der Längserstreckung des Leuchtengehäuses 14 verlaufenden vertikalen Mittelebene 26 ausgebildet. In gleichen Abständen von der Mittelebene 26 sowie in gleicher Höhe oberhalb des Unterteils 20, d.h. etwa in der Höhe der umgebogenen Abschnitte 22 des Leuchtengehäuses 14, ist je eine parallel zur Mittelebene 26 verlaufende Leuchtröhre 28 angeordnet. Oberhalb jeder Leuchtröhre ist je ein im wesentlichen leistenförmiger, flach nach unten konkav gekrümmter Reflektor 30 angebracht, dessen Unterkante an einer Stelle 32 an der oberen Hälfte des Leuchtröhrenumfangs etwa anliegt oder in geringem Abstand von demselben angeordnet ist. Bei der dargestellten Ausführungsform ist diese Stelle 32 von der Scheitellinie 34 jeder Leuchtröhre 28 zur Mittelebene 26 hin verschoben. An seinem von der jeweils zugehörigen Leuchtröhre 28 abgelegenen Ende weist jeder Reflektor 30 eine zu seiner Versteifung in Längsrichtung dienende, nach schräg außen und unten weisende Abwinkelung 36 auf. Die verhältnismäßig flachen Reflektoren 30 sind nach oben und innen, d.h. zur Mittelebene 26 hin, leicht konvex und nach außen und unten leicht konkav gekrümmt.The luminaire housing 14 is symmetrical to one in the direction the longitudinal extension of the lamp housing 14 extending vertical center plane 26 is formed. At equal intervals from the median plane 26 and at the same height above the Lower part 20, i. approximately at the height of the bent sections 22 of the lamp housing 14, one is parallel to the Midplane 26 extending arc tube 28 is arranged. Above each arc tube is each a substantially strip-shaped, flat down concave curved reflector 30 attached, the lower edge at a location 32 at the top Half of the luminous tube circumference approximately rests or in low Distance from the same is arranged. In the illustrated Embodiment is this point 32 from the apex line 34th each arc tube 28 shifted to the center plane 26 out. On his remote from the respective associated arc tube 28 At the end, each reflector 30 has a stiffener in it Serving in the longitudinal direction, pointing obliquely outwards and downwards Bend 36 on. The relatively flat reflectors 30 are upwardly and inwardly, i. towards the median plane 26, slightly convex and slightly concave curved outwards and downwards.

Im Bereich zwischen den beiden Reflektoren 30 und den beiden Leuchtröhren 28 ist ein symmetrisch zur Mittelebene 26 angeordneter Zusatzreflektor 38 vorgesehen, der zu beiden Seiten der Mittelebene 26 je eine schräg nach oben und innen geneigte ebene Reflektorfläche 40 bildet, die mit dem jeweils gegenüberliegenden Reflektor 30 einen nach oben sich erweiternden spitzen Winkel einschließt. Dieser Winkel geht dabei von der mittleren Neigung des Vertikalschnitts des Reflektors 30 ohne Berücksichtigung von dessen Krümmung aus. Jede ebene Reflektorfläche 40 weist an ihrem unteren Rand eine zur Mittelebene 26 hin weisende Abwinkelung 42 auf.In the area between the two reflectors 30 and the two Light tubes 28 is arranged symmetrically to the center plane 26 Additional reflector 38 is provided, on both sides the median plane 26 each inclined obliquely upwards and inwards level reflector surface 40 forms, with the respective opposite reflector 30 an upwardly flared includes acute angle. This angle goes here from the mean inclination of the vertical section of the reflector 30 regardless of its curvature. Every level Reflector surface 40 has at its lower edge to the Center plane 26 pointing towards bending 42.

Jeder Reflektor 30 dient im wesentlichen dazu, das von der Leuchtröhre 28 ausgehende Licht zum größten Teil in einen durch gestrichelte Linien angedeuteten, schräg seitlich nach oben weisenden Winkelbereich B zu lenken. Die untere Grenze 44 des Winkelbereiches B wird dabei durch den oberen Rand des abgebogenen Abschnitts 22 bestimmt, während die obere Grenze 46 durch den äußeren Rand der Abwinkelung 36 festgelegt wird. Durch Änderung der Breite des Abschnitts 22 und der Abwinkelung 36 sowie der Krümmung des Reflektors 30 und der Lage der Stelle 32 kann die Öffnung des Winkelbereiches B in gewissen Grenzen verändert werden.Each reflector 30 serves essentially to that of the Incandescent tube 28 outgoing light for the most part in one indicated by dashed lines, obliquely laterally to direct the above-pointing angle range B. The lower limit 44 of the angular range B is thereby through the upper edge of the bent portion 22 determines while the upper limit 46 is determined by the outer edge of the bend 36. By changing the width of section 22 and the bend 36 and the curvature of the reflector 30 and the position of the Point 32 may be the opening of the angular range B in certain Borders are changed.

Das von der Leuchtröhre 28 nach oben und innen, d.h. in Richtung zur Decke und zur Mittelebene 26 hin abgestrahlte Licht tritt in einen Winkelbereich C aus, der im wesentlichen direkt nach oben zur Decke 10 gerichtet ist. Durch Wahl der Lage der Stelle 32 kann der, Anteil dieses Lichts an der Gesamtabstrahlung der Leuchtröhre 28 eingestellt werden. Die äußere Grenze 48 des Winkelbereichs C wird durch die konvex gekrümmte Innenseite des Reflektors 30 bestimmt, während die äußere Grenze 50 durch die Reflexionsfläche 40 des Reflektors 38 festgelegt wird.The light emitted by the arc tube 28 upwards and inwards, ie towards the ceiling and the center plane 26, exits into an angle range C which is directed essentially directly upwards to the ceiling 10. By choosing the position of the point 32, the proportion of this light in the total emission of the arc tube 28 can be adjusted. The outer boundary 48 of the angular range C is determined by the convexly curved inner side of the reflector 30, while the outer limit 50 is determined by the reflection surface 40 of the reflector 38.

Das restliche Licht der Leuchtröhren 28 geht nach unten auf die Innenfläche des Unterteils 20 des Leuchtengehäuses 14. Es wird von hier ebenfalls teilweise nach oben reflektiert und tritt andererseits zu einem kleinen Teil nach unten, z.B. durch Löcher eines Lochblechs oder dergl., aus. Die Abwinkelungen 42 des mittleren Zusatzreflektors 38 dienen zur gleichmäßigeren Aufhellung des Unterteils 20, um einen gleichmäßigen Helligkeitseffekt zu erreichen, wenn man die Leuchte von unten betrachtet.The remaining light of the fluorescent tubes 28 goes down the inner surface of the lower part 20 of the lamp housing 14. Es is reflected from here also partly upwards and on the other hand, to a small extent, down, e.g. through holes in a perforated plate or the like, from. The bends 42 of the central auxiliary reflector 38 are used for more uniform lightening of the lower part 20 to one to achieve uniform brightness effect, if one uses the Luminaire viewed from below.

Um eine zu starke Leuchtdichte im Reflektor 30 (konkave Seite) zu vermeiden, kann ein Bereich 52 der Innenfläche des Leuchtengehäuses 14 (sichtbarer Reflexionsbereich des Reflektors 30 in Betrachtungsrichtung D) reflexionsärmer ausgebildet werden.Too much luminance in the reflector 30 (concave Page), an area 52 of the inner surface of the Luminaire housing 14 (visible reflection range of the reflector 30 in viewing direction D) formed less reflective become.

Dies verhindert, daß eine zu starke Blendung bei etwa waagrechter seitlicher Betrachtung der Leuchte in Richtung des Pfeils D eintritt.This prevents that too much glare at about horizontal lateral view of the light in the direction of the Arrow D enters.

In Fig.2 ist die in Fig.1 gezeigte Leuchte in ihrer kurzen Abhängung an der Raumdecke 10 im ungefähren Verhältnis zur Raumhöhe dargestellt, während sie in Fig.3 in ihrer Anordnung auf einem auf dem Fußboden 13 stehenden hohen Ständer 17 mit Standfuß 15 dargestellt ist.In Figure 2, the lamp shown in Figure 1 is in its short Suspension on the ceiling 10 in approximate relation to Room height shown, while in Figure 3 in their arrangement on a standing on the floor 13 high stand 17 with Stand 15 is shown.

Claims (9)

  1. An indirect wide-beam luminaire having an elongate luminaire housing (14) which runs symmetrically to a vertical centre plane (26) and at least mainly screens the emergence of light downwards, two fluorescent lamps (28) disposed in said housing at an equal distance on either side of the centre plane (26) and at least one reflector (30) disposed in the luminaire housing (14) between the centre plane (26) and the fluorescent lamp (2) parallel thereto,
    characterised in that in the region between the two reflectors (30) and the two fluorescent lamps (28) there is provided an additional reflector (38) disposed symmetrically to the centre plane (26) of the luminaire housing (14), which comprises at least two flat reflection surfaces (40) which in each case with one of the reflectors (30) encloses an upwardly widening acute angle (C).
  2. An indirect luminaire according to Claim 1,
    characterised in that at its lower end each reflection surface (40) has a bent portion (42) pointing to the centre plane (26) of the luminaire housing (14).
  3. An indirect luminaire according to Claim 1 or 2,
    characterised in that the luminaire housing (14) comprises a lower part (20) which is curved slightly convexly downwards and is made from perforated, partially transparent material,
    in that the reflectors (30) are curved convexly towards the centre plane (26) of the luminaire housing and on the opposite side are curved correspondingly concavely and in each case from a location (32) on the upper half of the perimeter of the associated fluorescent lamp (27) extend slightly inclined upwards away from the centre plane (26), while the light of the fluorescent lamps (28) strikes downwards directly onto the inner face of the lower part (20) of the luminaire housing (14).
  4. An indirect luminaire according to Claim 3,
    characterised in that the location (32) at the upper half of the perimeter of the fluorescent lamp (28) is shifted from the apex line (34) thereof towards the centre plane (26) of the luminaire housing (14).
  5. An indirect luminaire according to Claim 3 or 4,
    characterised in that each reflector (30), at its end farther from the associated florescent lamp (28), comprises a bent portion (36) pointing away from the centre plane (26) of the luminaire housing (14).
  6. An indirect luminaire according to one of the preceding Claims,
    characterised in that the inner side of the luminaire housing (14) has a low-reflection construction in the reflection region (52) of each reflector (30).
  7. An indirect luminaire according to one of the preceding Claims,
    characterised in that the luminaire housing (14) comprises a transparent upper part (24).
  8. An indirect luminaire according to one of the preceding Claims,
    characterised by an upwardly extending luminaire shaft (16) for suspension on a ceiling (10) of a room.
  9. An indirect luminaire according to one of Claims 1 - 7,
    characterised by a standard (17) bearing the luminaire housing (14) with a support foot (15) lying on the floor:
EP96114285A 1995-10-10 1996-09-06 Indirect wide beam luminaire Expired - Lifetime EP0768492B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19537685 1995-10-10
DE19537685A DE19537685C1 (en) 1995-10-10 1995-10-10 Wide beam indirect light

Publications (2)

Publication Number Publication Date
EP0768492A1 EP0768492A1 (en) 1997-04-16
EP0768492B1 true EP0768492B1 (en) 2003-01-08

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EP96114285A Expired - Lifetime EP0768492B1 (en) 1995-10-10 1996-09-06 Indirect wide beam luminaire

Country Status (10)

Country Link
US (1) US5823656A (en)
EP (1) EP0768492B1 (en)
JP (1) JPH09115319A (en)
AT (1) ATE230839T1 (en)
CZ (1) CZ289619B6 (en)
DE (2) DE19537685C1 (en)
DK (1) DK0768492T3 (en)
NO (1) NO317321B1 (en)
PL (1) PL180394B1 (en)
ZA (1) ZA968394B (en)

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DE19822305C1 (en) * 1998-05-18 1999-12-02 Waldmann Gmbh & Co Herbert Wide beam indirect light
US6186642B1 (en) * 1999-03-12 2001-02-13 Steelcase Inc. On-site fabricated linear ambient lighting system
US6305816B1 (en) 1999-03-12 2001-10-23 Steelcase Development Corporation On-site fabricated linear ambient lighting system
WO2000070264A1 (en) * 1999-05-13 2000-11-23 Energy Management Limited Improvements in light fittings
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DE19537685C1 (en) 1997-03-13
PL180394B1 (en) 2001-01-31
PL316474A1 (en) 1997-04-14
DE59610039D1 (en) 2003-02-13
ZA968394B (en) 1997-05-13
EP0768492A1 (en) 1997-04-16
CZ289496A3 (en) 1997-09-17
NO964270D0 (en) 1996-10-08
ATE230839T1 (en) 2003-01-15
CZ289619B6 (en) 2002-03-13
US5823656A (en) 1998-10-20
NO317321B1 (en) 2004-10-11
JPH09115319A (en) 1997-05-02
DK0768492T3 (en) 2003-04-22
NO964270L (en) 1997-04-11

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