EP1586818B1 - Luminaire - Google Patents
Luminaire Download PDFInfo
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- EP1586818B1 EP1586818B1 EP05008108A EP05008108A EP1586818B1 EP 1586818 B1 EP1586818 B1 EP 1586818B1 EP 05008108 A EP05008108 A EP 05008108A EP 05008108 A EP05008108 A EP 05008108A EP 1586818 B1 EP1586818 B1 EP 1586818B1
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- EP
- European Patent Office
- Prior art keywords
- prism
- cover
- luminaire
- luminaire according
- prism cover
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Classifications
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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
- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
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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
- 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
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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
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
Definitions
- the present invention relates to a luminaire with a light component radiated directly toward the underside and an indirect light component radiated toward the upper side, comprising at least one luminous means aligned in the longitudinal direction of the housing and at least one prism cover below the luminous means.
- Luminaires in which prism covers are used which are arranged below the luminous means have been known for some time from the prior art.
- the use of a kind of prism cover for the downwardly radiated light component in a so-called direct / indirect light is also known and is for example in the utility model DE 299 03 298 U1 described.
- This is a comparatively flat luminaire, which radiates an indirect light component, which contributes to the general brightening of the room, as a suspension lamp suspended from the ceiling. With the light component radiated directly from the luminaire to the underside, it is important in the case of such a suspended luminaire that good glare reduction be provided.
- a standard luminaire for illuminating, for example, office space should have a glare of those light components that emerge at angles from the luminaire, which are shallower than 65 ° to the vertical, since such flat emitted light components can dazzle people working on computer screens.
- the fluorescent lamps immediately downwards exiting light component is directed by a light grid.
- a prism structure for a targeted and glare-free light distribution.
- plate-shaped light distribution elements with hollow chambers which scatter the light. These light distribution elements with scattering structure are used in the areas adjacent to the area in which the fluorescent lamps are located.
- the US 4,233,651 describes a work lamp, with a first, the fluorescent tube in the longitudinal direction covering prism plate with downward prisms, and a second, arranged underneath prism plate with upwardly and transversely to the longitudinal direction arranged priming plate only half the length.
- the lower prism plate does not limit the angle of the downwardly emitted light.
- the object of the present invention is to provide a luminaire of the type mentioned, which has a further improved Entblendungs characterizing at the same time high luminous efficacy with respect to the downwardly emerging from the lamp light component.
- At least one first prism cover is provided with a prism structure oriented essentially in the longitudinal direction of the luminous means, and at least one second prism cover with a prism structure aligned substantially transversely to the longitudinal direction of the luminous means, wherein the second prism cover covers the first prism cover at least in regions.
- the first prism cover effects effective glare suppression in a main viewing direction
- the second prism cover achieves an effective glare reduction also in directions which are substantially transverse to the aforementioned main viewing direction.
- the two prismatic covers can cover or overlap predominantly or preferably almost completely. Accordingly, the first prism cover is preferably arranged at a suitable distance below the luminous means and the second prism cover can be arranged at a greater or lesser distance again below this first prism cover. If a flat construction of the luminaire is desired, the second lower prism cover is preferably arranged comparatively close to the first upper prism cover.
- the first prism cover preferably has prism structures extending on the underside and preferably in the longitudinal direction of the luminous means. These prism structures are preferably designed such that a tooth profile results in the cross section of the prism cover, that is to say thus transversely to the longitudinal direction of the prism structures. Preferably, it is a sawtooth or triangular tooth profile, wherein a symmetrical tooth profile shape is particularly preferred. Preferably, the prism edges span an angle ⁇ (see Fig.
- the downwardly facing priming surfaces are inclined by 40 to 50 ° to the horizontal central plane of the lamp, so that substantially orthogonal to the Reflected light is deflected by two reflections on the prism surfaces in the upper half-space prism cover, so that the luminance of the prism plate is reduced immediately below the light source.
- prism edges are flattened, so that a trapezoidal structure results in cross-section transverse to the prism structure, so that the orthogonally incident light is not completely deflected into the upper half-space. Due to the extent of the flattening, the proportion of the light not deflected into the upper half-space can be adjusted.
- the flattening is rounded, preferably in the form of a circular arc (in the cross-sectional view, radius R in FIG Fig. 2 ) so that the passing light is fanned out.
- the prism structure may have a more or less strong tread depth. It is essential that the tread depth is not too large, otherwise a stripe structure can form below the luminaire. With a tread depth of 0.5 to 2 mm (H in Fig. 2 ), preferably less than 1.5 mm, it comes at a distance of not more than 10 cm from the lamp base no longer to form such strip structures.
- the first, preferably upper prism cover may preferably have a substantially flat plate shape.
- the lower, preferably second prismatic cover may preferably have a convexly arched basic shape as seen from the underside of the luminaire, preferably viewed convexly in the transverse direction of the luminaire, that is transversely to the longitudinal orientation of the luminous means, wherein elongated fluorescent lamps are generally used as the luminous means.
- the radius of curvature of the convexly curved base body may be 6 to 10 times the diameter of the fluorescent tube, wherein the distance between the longitudinal central axis of the fluorescent tube from the longitudinal center line of the curved base body preferably about 1.7 to 2.5 times the diameter of the fluorescent tube corresponds.
- the side longitudinal edges of the first and second priming cover touch or have only a small distance.
- the prism structure of the second prism cover preferably has a larger prism angle.
- the angle between the prism surfaces 110 to 130 ° (angle ⁇ in Fig. 3 ), particularly preferably 115 to 125 °, be, preferably without flattening or rounding of the prism edges.
- the prism covers are made of highly transparent material such as glass or plastics, such as acrylic glass.
- the longitudinal extent of the luminaire corresponds to the length of the fluorescent tube plus the extension of the terminating elements required at both ends.
- the horizontal transverse extent can be 5 to 12 times the lamp diameter.
- the luminaire according to the invention is preferably a pendant luminaire, but in principle a combination of the prism covers according to the present invention is also suitable, for example, in the case of a floor lamp.
- the inventively preferred pendant lamp is open above the bulb, so that a part of the light emitted by the bulb, including the upwardly deflected by the first prism cover light shines against the ceiling and from there contributes as an indirect diffused light for room illumination.
- the lamp according to the invention can also be a surface or recessed luminaire with lateral Lichtverteilhuntn, the lateral vertical, the fluorescent tube facing transparent, diffusely scattering light entry surfaces, an upper designed as a reflector cover and lower, converging towards the reflector converging transparent, diffusely scattering . have curved light emitting surfaces.
- the second prism cover in the basic form of a flat plate. This results in that the two prism covers can be close to each other, a particularly low height of the lamp.
- both prismatic covers may be formed with a curved basic structure, in particular with a curvature in the same direction. If the first prism cover is formed with a planar upper side and a convexly curved underside, the prism structure being rotated with the radius of curvature, a particularly good emission angle limitation of the light emitted by the illuminant with a flat emission angle can be achieved.
- fluorescent lamps are preferably used in a luminaire according to the invention fluorescent lamps, wherein one, two or more fluorescent lamps can be used, preferably in the longitudinal direction of the luminaire extending and arranged parallel to each other.
- asymmetrically radiating luminaires by asymmetrical design of the prism structure, for example to equip luminaires which are installed in the vicinity of room walls with an asymmetrically directed downward and to the room wall lighting profile, since it does not depend on glare-free wall if there are no people here.
- the luminaire 1 consists essentially of a fluorescent lamp 2, a luminaire housing 3, a first primer cover 4 and a second prism cover 5.
- the fluorescent lamp 2 mounted on a suspension, not shown below the ceiling lamp 1 radiates on the one hand directly upwards against the ceiling for indirect diffuse room lighting.
- the radiated down at a large opening angle to the first prism cover 4 light is deflected by the prism diffraction on the one hand to a narrower angle, preferably preferably less than 65 ° to the vertical central plane and partially deflected upward, with this first prism cover 4 substantially no constriction the emission angle in the longitudinal direction of the lamp 1 takes place.
- a second, preferably convexly curved, prismatic cover 5 is provided below the first priming cover 4, the prism structure of which is formed transversely to the prismatic structure of the first cover 4 and which therefore causes a narrowing of the emission angle in the longitudinal direction of the luminaire.
- the first prism cover 4 has a flat top and a bottom with a prismatic structure.
- the prism structure consists of parallel to the light bulb elongated prism surfaces which together form an angle ⁇ of 40 to 50 ° and the prime edges are flattened by a rounding with the radius R, which may be, for example, 0.2 to 0.7 mm.
- the profile depth H of the prisms can be 0.5 to 1.5 mm, for example, the extent L of the flat flank surfaces of the prisms can be 0.2 to 1.2 mm.
- the second prism cover according to Fig. 3 an angle ⁇ between the inwardly directed prism flanks of 110 to 125 °.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Optical Elements Other Than Lenses (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Illuminated Signs And Luminous Advertising (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Leuchte mit einem direkt zur Unterseite hin abgestrahlten Lichtanteil und einem zur Oberseite hin abgestrahlten indirekten Lichtanteil, umfassend mindestens ein in Längsrichtung des Gehäuses ausgerichtetes Leuchtmittel, sowie mindestens eine Prismenabdeckung unterhalb des Leuchtmittels.The present invention relates to a luminaire with a light component radiated directly toward the underside and an indirect light component radiated toward the upper side, comprising at least one luminous means aligned in the longitudinal direction of the housing and at least one prism cover below the luminous means.
Leuchten, bei denen Prismenabdeckungen verwendet werden, die unterhalb des Leuchtmittels angeordnet sind, sind seit längerer Zeit aus dem Stand der Technik bekannt. Die Verwendung einer Art Prismenabdeckung für den nach unten hin abgestrahlten Lichtanteil bei einer sogenannten direkt/indirekt Leuchte ist ebenfalls bekannt und wird beispielsweise in dem Gebrauchsmuster
Es ist bekannt, bei Leuchten mit Leuchtmitteln in Form von Leuchtstofflampen zur Lichtlenkung "Prismenabdeckungen" mit in einer Richtung verlaufenden parallelen beabstandeten Rippen zu verwenden, die eine Art Sägezahnprofil oder Dreiecksprofil an der dem Leuchtmittel abgewandten Seite aufweisen. Durch Verwendung einer solchen Prismenabdeckung kann man durch gezielte Brechung der von dem Leuchtmittel abgestrahlten Lichtstrahlen eine verbesserte Entblendungscharakteristik erzielen. Durch den Verlauf der Rippen oder des Sägezahnprofils oder Dreiecksprofils bedingt wird die Entblendung jedoch nur in bestimmten Betrachtungsrichtungen erzielt. Schaut man aus Richtungen quer zur Hauptrichtung, in der die Entblendung erfolgt, in die Leuchte, ist die Entblendung noch nicht ausreichend.It is known to use in luminaires with bulbs in the form of fluorescent lamps for light guidance "prism covers" with extending in a direction parallel spaced ribs having a kind of sawtooth or triangular profile on the side facing away from the light source. By using such a prism cover can be achieved by targeted refraction of the emitted light rays from the lamp an improved anti-glare characteristic. Due to the course of the ribs or the sawtooth profile or triangular profile due to the glare is achieved only in certain viewing directions. Looking from directions transverse to the main direction, in which the glare takes place, in the lamp, the glare is not sufficient.
Die
Aus der
Ausgehend von diesem Stand der Technik besteht die Aufgabe der vorliegenden Erfindung darin, eine Leuchte der eingangs genannten Art zu schaffen, die eine weiter verbesserte Entblendungscharakteristik aufweist bei gleichzeitig hoher Lichtausbeute bezüglich des nach unten hin aus der Leuchte austretenden Lichtanteils.Based on this prior art, the object of the present invention is to provide a luminaire of the type mentioned, which has a further improved Entblendungscharakteristik at the same time high luminous efficacy with respect to the downwardly emerging from the lamp light component.
Die Lösung dieser Aufgabe liefert eine erfindungsgemäße Leuchte der eingangs genannten Art mit den kennzeichnenden Merkmalen des Hauptanspruchs.The solution to this problem provides a lamp according to the invention of the type mentioned above with the characterizing features of the main claim.
Erfindungsgemäß ist vorgesehen, dass mindestens eine erste Prismenabdeckung mit einer im Wesentlichen in Längsrichtung des Leuchtmittels ausgerichteten Prismenstruktur vorgesehen ist, sowie mindestens eine zweite Prismenabdeckung mit einer im Wesentlichen quer zur Längsrichtung des Leuchtmittels ausgerichteten Prismenstruktur, wobei die zweite Prismenabdeckung die erste Prismenabdeckung mindestens bereichsweise überdeckt.According to the invention, it is provided that at least one first prism cover is provided with a prism structure oriented essentially in the longitudinal direction of the luminous means, and at least one second prism cover with a prism structure aligned substantially transversely to the longitudinal direction of the luminous means, wherein the second prism cover covers the first prism cover at least in regions.
Durch die Verwendung zweier Prismenabdeckungen kann man erreichen, dass die erste Prismenabdeckung in einer Hauptbetrachtungsrichtung eine effektive Entblendung bewirkt und durch die zweite Prismenabdeckung dann auch in Richtungen, die im Wesentlichen quer zu der vorgenannten Hauptbetrachtungsrichtung verlaufen eine ebenfalls effektive Entblendung erzielt wird.Through the use of two prism covers it can be achieved that the first prism cover effects effective glare suppression in a main viewing direction, and that the second prism cover achieves an effective glare reduction also in directions which are substantially transverse to the aforementioned main viewing direction.
In dem für den Lichtaustritt nach unten relevanten Bereich können sich die beiden Prismenabdeckungen überwiegend oder vorzugsweise nahezu vollständig überdecken oder überlappen. Die erste Prismenabdeckung wird demnach vorzugsweise in angemessenem Abstand unterhalb des oder der Leuchtmittel angeordnet und die zweite Prismenabdeckung kann mit mehr oder weniger großem Abstand wiederum unterhalb dieser ersten Prismenabdeckung angeordnet werden. Wird eine möglichst flache Bauweise der Leuchte angestrebt, ist vorzugsweise die zweite untere Prismenabdeckung vergleichsweise nahe unter der ersten oberen Prismenabdeckung angeordnet.In the area that is relevant for the light emission downwards, the two prismatic covers can cover or overlap predominantly or preferably almost completely. Accordingly, the first prism cover is preferably arranged at a suitable distance below the luminous means and the second prism cover can be arranged at a greater or lesser distance again below this first prism cover. If a flat construction of the luminaire is desired, the second lower prism cover is preferably arranged comparatively close to the first upper prism cover.
Die erste Prismenabdeckung weist vorzugsweise unterseitig und vorzugsweise in Längsrichtung des Leuchtmittels sich erstreckende Prismenstrukturen auf. Diese Prismenstrukturen sind vorzugsweise derart ausgebildet, dass sich im Querschnitt der Prismenabdeckung, das heißt also quer zur Längsrichtung der Prismenstrukturen ein Zahnprofil ergibt. Vorzugsweise handelt es sich um ein Sägezahnprofil oder Dreieckszahnprofil, wobei eine symmetrische Zahnprofilform besonders bevorzugt ist. Vorzugsweise spannen die Prismenflanken einen Winkel α (siehe
Weiter bevorzugt sind Prismenkanten abgeflacht, so dass sich im Querschnitt quer zur Prismenstruktur eine trapezartige Struktur ergibt, so dass das orthogonal auftreffende Licht nicht vollständig in den oberen Halbraum umgelenkt wird. Durch das Ausmaß der Abflachung lässt sich der Anteil des nicht in den oberen Halbraum umgelenkten Lichtes einstellen.More preferably prism edges are flattened, so that a trapezoidal structure results in cross-section transverse to the prism structure, so that the orthogonally incident light is not completely deflected into the upper half-space. Due to the extent of the flattening, the proportion of the light not deflected into the upper half-space can be adjusted.
Weiterhin bevorzugt ist die Abflachung gerundet, vorzugsweise in Form eines Kreisbogens (in der Querschnittsansicht, Radius R in
Die erste, vorzugsweise obere Prismenabdeckung kann vorzugsweise eine im Wesentlichen ebene Plattenform aufweisen.The first, preferably upper prism cover may preferably have a substantially flat plate shape.
Die untere, vorzugsweise zweite Prismenabdeckung kann vorzugsweise eine von der Leuchtenunterseite her gesehen konvex gewölbte Grundform aufweisen, vorzugsweise konvex gewölbt in Querrichtung der Leuchte gesehen, das heißt quer zur Längsausrichtung des Leuchtmittels, wobei als Leuchtmittel in der Regel langgestreckte Leuchtstofflampen dienen. Der Wölbungsradius des konvex gewölbten Grundkörpers kann das 6- bis 10-fache des Durchmessers der Leuchtstoffröhre betragen, wobei der Abstand der Längsmittelachse der Leuchtstoffröhre von der Längsmittellinie des gewölbten Grundkörpers vorzugsweise etwa dem 1,7- bis 2,5-fachen Durchmesser der Leuchtstoffröhre entspricht.The lower, preferably second prismatic cover may preferably have a convexly arched basic shape as seen from the underside of the luminaire, preferably viewed convexly in the transverse direction of the luminaire, that is transversely to the longitudinal orientation of the luminous means, wherein elongated fluorescent lamps are generally used as the luminous means. The radius of curvature of the convexly curved base body may be 6 to 10 times the diameter of the fluorescent tube, wherein the distance between the longitudinal central axis of the fluorescent tube from the longitudinal center line of the curved base body preferably about 1.7 to 2.5 times the diameter of the fluorescent tube corresponds.
Vorzugsweise berühren sich die Seitenlängskanten der ersten und zweiten Primenabdeckung oder weisen nur einen geringen Abstand auf.Preferably, the side longitudinal edges of the first and second priming cover touch or have only a small distance.
Die Prismenstruktur der zweiten Prismenabdeckung weist vorzugsweise einen größeren Prismenwinkel auf. Vorzugsweise kann der Winkel zwischen den Prismenflächen 110 bis 130° (Winkel β in
Die Prismenabdeckungen bestehen aus hochtransparentem Material wie Glas oder Kunststoffen, wie zum Beispiel Acrylglas.The prism covers are made of highly transparent material such as glass or plastics, such as acrylic glass.
Die Längsausdehnung der Leuchte entspricht der Länge der Leuchtstoffröhre zuzüglich der Ausdehnung der an beiden Enden notwendigen Abschlusselemente. Die horizontale Querausdehnung kann das 5- bis 12-fache des Leuchtmitteldurchmessers betragen.The longitudinal extent of the luminaire corresponds to the length of the fluorescent tube plus the extension of the terminating elements required at both ends. The horizontal transverse extent can be 5 to 12 times the lamp diameter.
Die erfindungsgemäße Leuchte ist vorzugsweise eine Pendelleuchte, grundsätzlich kommt aber eine Kombination der Prismenabdeckungen gemäß der vorliegenden Erfindung auch beispielsweise bei einer Stehleuchte in Betracht. Die erfindungsgemäß bevorzugte Pendelleuchte ist oberhalb des Leuchtmittels offen, so dass ein Teil des vom Leuchtmittel abgestrahlten Lichtes einschließlich das von der ersten Prismenabdeckung nach oben umlenkte Licht gegen die Raumdecke strahlt und von dort als indirektes diffuses Licht zur Raumerhellung beiträgt.The luminaire according to the invention is preferably a pendant luminaire, but in principle a combination of the prism covers according to the present invention is also suitable, for example, in the case of a floor lamp. The inventively preferred pendant lamp is open above the bulb, so that a part of the light emitted by the bulb, including the upwardly deflected by the first prism cover light shines against the ceiling and from there contributes as an indirect diffused light for room illumination.
Die erfindungsgemäße Leuchte kann aber auch eine Anbau- oder Einbauleuchte mit seitlichen Lichtverteilkammern, die seitliche vertikale, der Leuchtstoffröhre zugewandte, transparente, diffus streuende Lichteintrittsflächen, eine obere als Reflektor ausgebildete Abdeckung und untere, sich zur Seite hin konvergent dem Reflektor annähernde transparente, diffus streuende, gewölbte Lichtabstrahlflächen aufweisen. Insbesondere bei Einsatz der Erfindung bei derartigen Einbau- oder Anbauleuchten ist es aus ästhetischen Gründen vorteilhaft, auch die zweite Prismenabdeckung in der Grundform einer ebenen Platte einzusetzen. Dabei ergibt sich, da die beiden Prismenabdeckungen dicht aufeinander liegen können, eine besonders niedrige Bauhöhe der Leuchte.The lamp according to the invention can also be a surface or recessed luminaire with lateral Lichtverteilkammern, the lateral vertical, the fluorescent tube facing transparent, diffusely scattering light entry surfaces, an upper designed as a reflector cover and lower, converging towards the reflector converging transparent, diffusely scattering . have curved light emitting surfaces. In particular, when using the invention in such recessed or surface mounted lights, it is advantageous for aesthetic reasons to use the second prism cover in the basic form of a flat plate. This results in that the two prism covers can be close to each other, a particularly low height of the lamp.
Ferner kann es vorteilhaft sein, beide Prismenabdeckung mit gewölbter Grundstruktur auszubilden, insbesondere mit Wölbung in derselben Richtung. Wird die erste Prismenabdeckung mit ebener Oberseite und konvex gewölbter Unterseite ausgebildet, wobei die Prismenstruktur mit dem Wölbungsradius gedreht wird, kann eine besonders gute Abstrahlwinkelbegrenzung des vom Leuchtmittel mit flachem Abstrahlwinkel abgestrahlten Lichtes erreicht werden.Furthermore, it may be advantageous to form both prismatic covers with a curved basic structure, in particular with a curvature in the same direction. If the first prism cover is formed with a planar upper side and a convexly curved underside, the prism structure being rotated with the radius of curvature, a particularly good emission angle limitation of the light emitted by the illuminant with a flat emission angle can be achieved.
Als Leuchtmittel dienen bei einer erfindungsgemäßen Leuchte vorzugsweise Leuchtstofflampen, wobei eine, zwei oder mehrere Leuchtstofflampen verwendet werden können, vorzugsweise in Längsrichtung der Leuchte verlaufend und zueinander parallel angeordnet. Insbesondere bei Leuchten mit zwei oder mehr Leuchtstofflampen kann es vorteilhaft sein, das nach unten in Richtung der Prismenabdeckungen abgestrahlte Licht durch eine oberhalb der ersten Prismenabdeckung angeordnete teilverspiegelte Folie abzuschwächen.As illuminants are preferably used in a luminaire according to the invention fluorescent lamps, wherein one, two or more fluorescent lamps can be used, preferably in the longitudinal direction of the luminaire extending and arranged parallel to each other. In particular, in the case of luminaires having two or more fluorescent lamps, it may be advantageous to attenuate the light radiated downward in the direction of the prismatic covers by a partially-mirrored film arranged above the first prismatic cover.
Ferner ist es möglich, durch asymmetrische Gestaltung der Prismenstruktur asymmetrisch abstrahlende Leuchten zur Verfügung zu stellen, beispielsweise Leuchten, die in der Nähe von Raumwänden angebracht werden, mit einem asymmetrisch nach unten und zur Raumwand gerichteten Beleuchtungsprofil auszustatten, da es in Wandnähe nicht auf Blendfreiheit ankommt, wenn sich hier keine Personen aufhalten.Furthermore, it is possible to provide asymmetrically radiating luminaires by asymmetrical design of the prism structure, for example to equip luminaires which are installed in the vicinity of room walls with an asymmetrically directed downward and to the room wall lighting profile, since it does not depend on glare-free wall if there are no people here.
Die Erfindung wird nachfolgend anhand der schematischen Figuren näher erläutert. In diesen zeigen:
- Fig.1
- einen senkrechten Querschnitt zur Längsachse des Leuchtmittels einer erfindungsgemäßen Pendelleuchte;
- Fig. 2
- eine Vergrößerung des Ausschnitts A aus
Fig. 1 zur Darstellung einer besonders bevorzugten Prismenstruktur der ersten Prismenabdeckung; und - Fig. 3
- eine Vergrößerung des Querschnitts B-B der
Fig. 1 zur Verdeutlichung der Prismenstruktur der zweiten Prismenabdeckung.
- Fig.1
- a vertical cross section to the longitudinal axis of the luminous means of a pendant lamp according to the invention;
- Fig. 2
- an enlargement of the section A from
Fig. 1 to illustrate a particularly preferred prism structure of the first prism cover; and - Fig. 3
- an enlargement of the cross section BB of
Fig. 1 to clarify the prism structure of the second prism cover.
Die Leuchte 1 besteht im Wesentlichen aus einer Leuchtstofflampe 2, einem Leuchtengehäuse 3, einer ersten Primenabdeckung 4 und einer zweiten Prismenabdeckung 5.The luminaire 1 consists essentially of a
Die Leuchtstofflampe 2 der an einer nicht dargestellten Aufhängung unterhalb der Raumdecke angebrachten Leuchte 1 strahlt einerseits direkt nach oben gegen die Decke zur indirekten diffusen Raumbeleuchtung.The
Das nach unten unter großen Öffnungswinkel auf die ersten Prismenabdeckung 4 abgestrahlte Licht wird durch die Prismenbeugung einerseits auf einen engeren Winkel, überwiegend vorzugsweise unter 65° zur vertikalen Leuchtenmittelebene abgelenkt und zum Teil nach oben umgelenkt, wobei an dieser ersten Prismenabdeckung 4 im Wesentlichen noch keine Einengung des Abstrahlwinkels in Längsrichtung der Leuchte 1 erfolgt.The radiated down at a large opening angle to the
Erfindungsgemäß ist unter der ersten Primenabdeckung 4 eine zweite, vorzugsweise vom Raum aus gesehen konvex gekrümmte, Prismenabdeckung 5 vorgesehen, deren Prismenstruktur quer zur Prismenstruktur der ersten Abdeckung 4 ausgebildet ist und die daher eine Einengung des Abstrahlwinkels in Längsrichtung der Leuchte bewirkt.According to the invention, a second, preferably convexly curved,
Wie aus
- 11
- Leuchtelamp
- 22
- LeuchtstofflampeFluorescent Lamp
- 33
- Leuchtengehäuseluminaire housing
- 44
- erste Prismenabdeckungfirst prism cover
- 55
- zweite Prismenabdeckungsecond prism cover
Claims (12)
- Luminaire having a light portion which is radiated directly towards the lower side,
comprising at least one fluorescent tube (2) and at least a first prism cover (4)
which is arranged below the fluorescent tube and which has a prism structure which is orientated at the lower side substantially in the longitudinal direction of the fluorescent tube,
and at least a second prism cover (5),
with the second prism cover being arranged below the first prism cover with a prism structure which is orientated transversely relative to the longitudinal axis of the fluorescent tube,
characterised in that the prism sides of the prism structure of the first cover have an angle (α) of from 80 to 100° and in that the at least second prism cover covers the first prism cover,
the prism sides of the prism structure of the second cover having an angle (β) which is greater than the prism side angle of the first prism cover. - Luminaire according to claim 1, wherein the prism sides of the second prism cover form an angle (β) of from 110 to 130°.
- Luminaire according to claim 1 or claim 2, wherein the first prism cover (4) has a substantially planar plate shape.
- Luminaire according to any one of claims 1 to 3, wherein the prism structure of the first prism cover (4) is constructed in cross-section as a triangular profile with rounded edges.
- Luminaire according to any one of claims 1 to 4, wherein the second prism cover (5), when viewed in the transverse direction of the luminaire from the lower side of the luminaire, has a basic shape which is curved in a convex manner.
- Luminaire according to any one of claims 1 to 5, wherein the prism structure of the second prism cover (5) is in the form of a tooth profile which extends in the direction which is transverse relative to the longitudinal axis of the fluorescent tube.
- Luminaire according to any one of claims 1 to 6, wherein the prism structure of the second prism cover (5) is a triangular tooth profile.
- Luminaire according to any one of claims 1 to 7, wherein the prism structure of the first prism cover (4) and/or the prism structure of the second prism cover (5) is a symmetrical triangular profile.
- Luminaire according to any one of claims 1 to 8, wherein it is a suspended luminaire having an upwardly radiating light portion.
- Luminaire according to any one of claims 1 to 7, wherein it is constructed with fluorescent lamps so as to have one or two lamps.
- Luminaire according to any one of claims 1 to 10, characterised in that the luminaire housing (3) is substantially open towards the upper side of the luminaire.
- Luminaire according to any one of claims 1 to 11, wherein the first prism cover (4) is located, in the region of the longitudinal edges thereof, on the longitudinal edge regions of the second lower prism cover (5) which is curved in a convex manner or is arranged thereabove with only very little spacing.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004018231 | 2004-04-15 | ||
DE102004018231A DE102004018231A1 (en) | 2004-04-15 | 2004-04-15 | lamp |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1586818A2 EP1586818A2 (en) | 2005-10-19 |
EP1586818A3 EP1586818A3 (en) | 2006-01-11 |
EP1586818B1 true EP1586818B1 (en) | 2010-03-31 |
Family
ID=34935134
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05008108A Not-in-force EP1586818B1 (en) | 2004-04-15 | 2005-04-13 | Luminaire |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1586818B1 (en) |
AT (1) | ATE462926T1 (en) |
DE (2) | DE102004018231A1 (en) |
ES (1) | ES2341551T3 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011012653B4 (en) * | 2011-02-28 | 2013-07-25 | Frensch Gmbh | recessed light |
DE102014004472B4 (en) * | 2014-03-28 | 2015-11-05 | Nordeon Gmbh | Luminous module having an optical element |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19961493A1 (en) * | 1999-05-25 | 2000-11-30 | Siteco Beleuchtungstech Gmbh | Pendant lamp with indirect light radiation |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1941079A (en) * | 1931-09-05 | 1933-12-26 | Holophane Co Inc | Lighting apparatus employing rectilinear light sources |
US2050429A (en) * | 1932-07-01 | 1936-08-11 | Holophane Co Inc | Light mixing apparatus |
US2269554A (en) * | 1938-03-01 | 1942-01-13 | Holophane Co Inc | Luminaire |
US2258354A (en) * | 1940-08-03 | 1941-10-07 | Doane Products Corp | Luminaire |
US2818500A (en) * | 1953-07-03 | 1957-12-31 | Holophane Co Inc | Prismatic reflectors |
DE1995588U (en) * | 1968-06-10 | 1968-10-31 | Boehmer & Co Gmbh Elektrotechn | FLUORESCENT TUBE LAMP |
US4233651A (en) * | 1978-03-30 | 1980-11-11 | Keene Corporation | Work area lighting system |
CH664817A5 (en) * | 1984-10-17 | 1988-03-31 | Peter A Balla | LIGHTING FOR CLOSED RURAL SPACES. |
US5056892A (en) * | 1985-11-21 | 1991-10-15 | Minnesota Mining And Manufacturing Company | Totally internally reflecting thin, flexible film |
US5493481A (en) * | 1990-01-26 | 1996-02-20 | Wiegand; Gregory P. | Banklight and method of gradated diffuse lighting |
US5040104A (en) * | 1990-03-19 | 1991-08-13 | Herman Miller, Inc. | Task light panel |
-
2004
- 2004-04-15 DE DE102004018231A patent/DE102004018231A1/en not_active Withdrawn
-
2005
- 2005-04-13 AT AT05008108T patent/ATE462926T1/en active
- 2005-04-13 EP EP05008108A patent/EP1586818B1/en not_active Not-in-force
- 2005-04-13 ES ES05008108T patent/ES2341551T3/en active Active
- 2005-04-13 DE DE502005009296T patent/DE502005009296D1/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19961493A1 (en) * | 1999-05-25 | 2000-11-30 | Siteco Beleuchtungstech Gmbh | Pendant lamp with indirect light radiation |
Also Published As
Publication number | Publication date |
---|---|
ES2341551T3 (en) | 2010-06-22 |
DE102004018231A1 (en) | 2005-12-08 |
ATE462926T1 (en) | 2010-04-15 |
EP1586818A2 (en) | 2005-10-19 |
DE502005009296D1 (en) | 2010-05-12 |
EP1586818A3 (en) | 2006-01-11 |
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