EP1672274B1 - Luminaire with a plurality of reflecting louvre slats - Google Patents

Luminaire with a plurality of reflecting louvre slats Download PDF

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Publication number
EP1672274B1
EP1672274B1 EP04300920A EP04300920A EP1672274B1 EP 1672274 B1 EP1672274 B1 EP 1672274B1 EP 04300920 A EP04300920 A EP 04300920A EP 04300920 A EP04300920 A EP 04300920A EP 1672274 B1 EP1672274 B1 EP 1672274B1
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EP
European Patent Office
Prior art keywords
blades
faces
luminaire
lamp
lamellae
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Not-in-force
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EP04300920A
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German (de)
French (fr)
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EP1672274A1 (en
Inventor
Dominique Jean-Marie Cherouge
Aurélien Hervé Dousson
Laurent Dubien
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SLI France
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SLI France
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Priority to DE602004012584T priority Critical patent/DE602004012584T2/en
Priority to AT04300920T priority patent/ATE389848T1/en
Priority to EP04300920A priority patent/EP1672274B1/en
Publication of EP1672274A1 publication Critical patent/EP1672274A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/02—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using parallel laminae or strips, e.g. of Venetian-blind type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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 the technical sector of luminaires in general.
  • a luminaire consists of several elements, namely, essentially of one or more lamps, of components necessary for the lighting and operation of said lamp, a support, generally metallic, in combination with an optical assembly which serves to direct the light outside the luminaire and to control the luminances.
  • the invention relates to a luminaire equipped with at least one fluorescent light source of elongated tubular shape.
  • the optical assembly used is of the type of those comprising longitudinal reflectors arranged along the fluorescent light source.
  • a plurality of planar lamellae arranged in the transverse direction of the luminaire.
  • the efficiency of a luminaire corresponds to the ratio between the luminous flux of the luminaire and the luminous flux of the lamps.
  • each point of a primary light source for example a lamp, or a secondary light source, such as a reflecting surface, transmits to a physical receiver (eye or sensor), radii luminous.
  • the sum of these rays constitutes a light beam which forms, in the receiver, an image of the source. This image is even brighter as the intensities reaching the receiver are important and the emission area is low. This image is the luminance.
  • luminance distributions of indoor lighting fixtures for fluorescent lamps in particular is very important.
  • These luminances which represent, as indicated, substantially the glare of the luminaire, are represented on abacuses which make it possible to measure the glare of the apparatus considered.
  • These charts also define the limits of the luminances acceptable by an observer, depending on the level of illumination and visual work performed for example.
  • the reflective lamellae in combination with the longitudinal reflectors, have the precise function of correctly distributing the light in the space. If the luminance in the transverse plane is well controlled by the aperture of the optic and the position in height of the lamp, the luminance in the longitudinal plane and the other intermediate planes is more difficult to control. Indeed, for the control of the luminance between the gamma angles 45 ° and 85 ° according to the charts of Bodmann and Söllner, the height of the flat slats and the pitch between them, are not sufficient considering the performances more and more elevated new lamps. It therefore appears that the flat shape of the slats is not the most appropriate.
  • a luminaire having a reflection grid composed of a plurality of blades defining at least one row of cells is known.
  • the reflection surfaces of blades extend with concave bending transversely to the row of reflection cells.
  • an element masks the space between the two juxtaposed blades of two successive reflection cells. As a result, closing the space between two blades adversely affects the performance of the optics.
  • the lamellae which constitute the optical assembly with lateral reflectors, are folded along the longitudinal axis of the parabola-shaped lamp.
  • the lamellae are united in pairs forming, at the junction, substantially a V, so that the convex faces will reflect the beam in gamma angles greater than those on the concave side, so that this convex face will be more dazzling than the concave face.
  • the object of the invention is to remedy these disadvantages in a simple, safe, effective and rational manner.
  • the problem to be solved by the invention is to create a luminaire optics capable of associating luminance control, as defined for example according to the Bodmann and Söllner charts, between the gamma angles 45 ° and 85 °, in the two main planes, transverse C0-C180 and longitudinal C90-C270, as required by the old regulations, while aiming to control these luminances in all the intermediate planes, as can be seen on the conical diagram of luminance of the figure 1 , in order to maintain a good distribution of light without reducing the efficiency of the luminaire.
  • a luminaire of the type comprising, in a known manner, a housing support receiving at least one linear tubular light source in combination with an optical assembly longitudinally delimiting lateral reflectors transversely receiving a plurality of reflection lamellae.
  • Another problem that the invention proposes to solve is to distribute the luminous flux so as to approach a distribution of revolution around the vertical axis of the luminaire, being reminded that the distribution of the luminous flux, in the case where the light source is constituted by a tubular fluorescent lamp, is likened to a torus, the axis of this revolution corresponding to that of said lamp, that is to say horizontal in the case of a luminaire installed on a ceiling .
  • the profile of the cross section delimited by the two faces is constituted by a circular arc to define a concave shape face and a convex shape face.
  • the cross-sectional profile of each lamella can evolve from a simple arc of a circle, from another curve, from non-aligned lines or from a combination of these different geometrical shapes. , in particular according to the transverse opening of the optical and the desired longitudinal scrolling and the desired conical distribution.
  • the upper edge of the slats and / or the lower edge of the slats may not be flat.
  • the luminaire comprises a support housing receiving at least one light source in the form of, for example, a linear fluorescent lamp, in combination with an optical assembly.
  • optical assembly is illustrated.
  • the latter is of the type having, in known manner, two lateral reflectors (R1) and (R2) transversely receiving a plurality of lamellae (1).
  • the lamellae and the reflectors are advantageously made of glossy or satin-finished aluminum of very small thickness, or of alumina plastic, or of painted thin sheet metal.
  • each lamella (1) has two faces (1a) and (1b) with identical and, at the very least, similar reflective characteristics and properties.
  • One of the faces (1a) is of concave shape, while the other face (1b) is of convex shape by presenting vertical generatrices parallel to each other arranged orthogonally to the longitudinal axis of the lamp, generally arranged in a horizontal plane.
  • the two faces (1a) and (1b) have a cross section in the horizontal plane, of constant thickness and whose profile is capable of distributing the luminous flux and decreasing the luminance of the vertical plane considered according to the longitudinal axis in favor of the luminance in the transverse plane, as well as in the intermediate planes.
  • the lamellae (1) have a curvature in the shape of an arc or other curve ( figures 4 , 6 , 7 and 8 ), or each lamella may consist of at least two planes (1c) and (1d) arranged angularly with respect to each other ( figures 9 and 9a ).
  • the strip (1) is composed of two profiles (1e) and (1f) offset in height and of opposite radius of curvature, being diametrically joined by means of arrangements (1g) suitable for mounting the strips by relative to the lateral reflectors (R1) and (R2).
  • arrangements (1g) which can be of any known and appropriate type, for example in the form of lugs, suitable to be engaged in corresponding openings formed in the thickness of the side reflectors.
  • the different lamellae (1) are arranged facing each other, to form a succession of bi-convex and bi-concave cells ( figure 11 ).
  • Each cell is composed of contiguous lamellae or not, or cross lamellae.
  • the different slats (1) can also be arranged in a parallel manner and oriented in the same direction.
  • the different lamellae (1) are arranged in a manner parallel to one another forming subgroups that are symmetrical with respect to the center of the optics ( figures 10 and 12 ).
  • the figure 13 shows an optical assembly whose lateral reflectors are equipped with slats conforming to those illustrated figure 8 forming two groups symmetrical with respect to the center of the optics.
  • the figures 14 and 15 show an optical assembly whose lateral reflectors are equipped with lamella respectively according to the illustrated embodiments figures 9 and 9a .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

The luminaire has a support case receiving a linear fluorescent lamp, and lateral reflectors (R1, R2) transversely receiving multiple reflection plates (1). Each plate has concave and convex faces with a transversal section in a horizontal plane, where section`s profile distributes luminous flux, decreases brightness of a vertical plane along a longitudinal axis, and increases brightness in transverse and intermediate planes. The plates have upper and lower edges that are rectilinear or that present a radius of curvature. The plates are not touched between them in a vertical longitudinal section of the lamp.

Description

L'invention se rattache au secteur technique des luminaires en général.The invention relates to the technical sector of luminaires in general.

On rappelle, d'une manière parfaitement connue pour un homme du métier, qu'un luminaire est constitué de plusieurs éléments, à savoir, essentiellement d'une ou plusieurs lampes, de composants nécessaires à l'allumage et au fonctionnement de ladite lampe, d'un support, généralement métallique, en combinaison avec un ensemble optique qui sert à diriger la lumière en dehors du luminaire et à contrôler les luminances.It will be recalled, in a manner perfectly known to a person skilled in the art, that a luminaire consists of several elements, namely, essentially of one or more lamps, of components necessary for the lighting and operation of said lamp, a support, generally metallic, in combination with an optical assembly which serves to direct the light outside the luminaire and to control the luminances.

Plus particulièrement, l'invention concerne un luminaire équipé d'au moins une source de lumière fluorescente de forme tubulaire allongée. L'ensemble optique utilisé est du type de ceux comprenant des réflecteurs longitudinaux disposés le long de la source de lumière fluorescent. Selon l'état antérieur de la technique, entre les deux réflecteurs longitudinaux, est montée une pluralité de lamelles planes disposées dans le sens transversal du luminaire. Ces ensembles optiques ont pour but de répartir et de contrôler la lumière dans l'espace.More particularly, the invention relates to a luminaire equipped with at least one fluorescent light source of elongated tubular shape. The optical assembly used is of the type of those comprising longitudinal reflectors arranged along the fluorescent light source. According to the prior art, between the two longitudinal reflectors is mounted a plurality of planar lamellae arranged in the transverse direction of the luminaire. These optical assemblies aim to distribute and control light in space.

Enfin, on rappelle, pour une meilleure compréhension de la suite de la description, que le rendement d'un luminaire correspond au rapport entre le flux lumineux du luminaire et le flux lumineux des lampes. Il convient de rappeler également que chaque point d'une source lumineuse primaire, d'une lampe par exemple, ou d'une source lumineuse secondaire, telle qu'une surface réfléchissante, émet vers un récepteur physique (oeil ou capteur), des rayons lumineux. La somme de ces rayons constitue un faisceau lumineux qui forme, dans le récepteur, une image de la source. Cette image est d'autant plus lumineuse que les intensités atteignant le récepteur sont importantes et que la surface d'émission est faible. Cette image constitue la luminance.Finally, it will be recalled, for a better understanding of the rest of the description, that the efficiency of a luminaire corresponds to the ratio between the luminous flux of the luminaire and the luminous flux of the lamps. It should also be recalled that each point of a primary light source, for example a lamp, or a secondary light source, such as a reflecting surface, transmits to a physical receiver (eye or sensor), radii luminous. The sum of these rays constitutes a light beam which forms, in the receiver, an image of the source. This image is even brighter as the intensities reaching the receiver are important and the emission area is low. This image is the luminance.

Or, la caractérisation des distributions des luminances des luminaires d'éclairage intérieur pour lampes fluorescentes notamment, s'avère très importante. Ces luminances qui représentent, comme indiqué, sensiblement l'éblouissement du luminaire, sont représentés sur des abaques qui permettent de mesurer l'éblouissement de l'appareil considéré. Ces abaques définissent par ailleurs les limites des luminances acceptables par un observateur, en fonction du niveau d'éclairement et du travail visuel effectué par exemple.However, the characterization of luminance distributions of indoor lighting fixtures for fluorescent lamps in particular is very important. These luminances, which represent, as indicated, substantially the glare of the luminaire, are represented on abacuses which make it possible to measure the glare of the apparatus considered. These charts also define the limits of the luminances acceptable by an observer, depending on the level of illumination and visual work performed for example.

On peut citer, comme il ressort de la figure 1, les abaques de Bodmann et Söllner.As can be seen from the figure 1 , the charts of Bodmann and Söllner.

Dans un ensemble optique, les lamelles réfléchissantes, en combinaison avec les réflecteurs longitudinaux, ont justement pour fonction de répartir correctement la lumière dans l'espace. Si la luminance, dans le plan transversal, est bien contrôlée, par l'ouverture de l'optique et la position en hauteur de la lampe, la luminance dans le plan longitudinal et les autres plans intermédiaires, est plus difficile à contrôler. En effet, pour le contrôle de la luminance entre les angles gamma 45° et 85° selon les abaques de Bodmann et Söllner, la hauteur des lamelles planes et le pas entre elles, ne sont pas suffisants compte tenu des performances de plus en plus élevées des nouvelles lampes. Il apparaît donc que la forme plane des lamelles n'est pas la mieux appropriée.In an optical assembly, the reflective lamellae, in combination with the longitudinal reflectors, have the precise function of correctly distributing the light in the space. If the luminance in the transverse plane is well controlled by the aperture of the optic and the position in height of the lamp, the luminance in the longitudinal plane and the other intermediate planes is more difficult to control. Indeed, for the control of the luminance between the gamma angles 45 ° and 85 ° according to the charts of Bodmann and Söllner, the height of the flat slats and the pitch between them, are not sufficient considering the performances more and more elevated new lamps. It therefore appears that the flat shape of the slats is not the most appropriate.

Par l'enseignement du brevet FR 2.734.044 , on connaît un luminaire présentant une grille de réflexion composée d'une pluralité de lames définissant au moins une rangée de cellules. Les surfaces de réflexion des lames s'étendent avec un cintrage concave transversalement par rapport à la rangée de cellules de réflexion. A la base de ce brevet, un élément masque l'espace entre les deux lames juxtaposées de deux cellules de réflexion successives. Il en résulte que le fait de fermer l'espace entre deux lames nuit au rendement de l'optique.By the teaching of the patent FR 2.734.044 a luminaire having a reflection grid composed of a plurality of blades defining at least one row of cells is known. The reflection surfaces of blades extend with concave bending transversely to the row of reflection cells. On the basis of this patent, an element masks the space between the two juxtaposed blades of two successive reflection cells. As a result, closing the space between two blades adversely affects the performance of the optics.

Selon le brevet DE 41 09 492 , qui représente l'état de la technique le plus proche, les lamelles, qui constituent l'ensemble optique avec des réflecteurs latéraux, sont pliées selon l'axe longitudinal de la lampe en forme de parabole. Selon un mode de réalisation les lamelles sont réunies deux à deux en formant, au niveau de la jonction, sensiblement un V, de sorte que les faces convexes, vont réfléchir le faisceau dans des angles gamma supérieurs à ceux du côté concave, de sorte que cette face convexe sera plus éblouissante que la face concave.According to the patent DE 41 09 492 , which represents the closest state of the art, the lamellae, which constitute the optical assembly with lateral reflectors, are folded along the longitudinal axis of the parabola-shaped lamp. According to one embodiment, the lamellae are united in pairs forming, at the junction, substantially a V, so that the convex faces will reflect the beam in gamma angles greater than those on the concave side, so that this convex face will be more dazzling than the concave face.

L'invention s'est fixée pour but de remédier à ces inconvénients, de manière simple, sûre, efficace et rationnelle.The object of the invention is to remedy these disadvantages in a simple, safe, effective and rational manner.

Le problème que se propose de résoudre l'invention est de créer un optique de luminaire capable d'associer le contrôle des luminances, telles que définies par exemple selon les abaques de Bodmann et Söllner, entre les angles gamma 45° et 85°, dans les deux plans principaux, transversal C0-C180 et longitudinal C90-C270, comme exigé par les anciennes réglementations, tout en ayant pour objectif de contrôler ces luminances dans tous les plans intermédiaires, comme on peut le voir sur le diagramme conique de luminance de la figure 1, afin de conserver une bonne répartition de la lumière sans réduire le rendement du luminaire.The problem to be solved by the invention is to create a luminaire optics capable of associating luminance control, as defined for example according to the Bodmann and Söllner charts, between the gamma angles 45 ° and 85 °, in the two main planes, transverse C0-C180 and longitudinal C90-C270, as required by the old regulations, while aiming to control these luminances in all the intermediate planes, as can be seen on the conical diagram of luminance of the figure 1 , in order to maintain a good distribution of light without reducing the efficiency of the luminaire.

Pour résoudre un tel problème, il a été conçu et mis au point un luminaire du type de ceux comprenant, d'une manière connue, un boîtier support recevant au moins une source de lumière tubulaire linéaire en combinaison avec un ensemble optique délimitant longitudinalement des réflecteurs latéraux recevant transversalement une pluralité de lamelles de réflexion.To solve such a problem, it has been designed and developed a luminaire of the type comprising, in a known manner, a housing support receiving at least one linear tubular light source in combination with an optical assembly longitudinally delimiting lateral reflectors transversely receiving a plurality of reflection lamellae.

Selon l'invention :

  • chaque lamelle présente deux faces ayant des caractéristiques optiques similaires ;
  • les deux faces sont parallèles entre elles et leurs génératrice sont orthogonales à l'axe longitudinal de la source lumineuse ;
  • le profil de la section transversale d'une épaisseur constante délimité par les deux faces (1a) et (1b), est constitué par une courbure pour définir une face de forme concave et une face de forme convexe, afin de répartir le flux lumineux et de diminuer la luminance du plan vertical considéré selon l'axe longitudinal, au profit de la luminance dans le plan transversal ainsi que dans les plans intermédiaires
  • les différentes lamelles (1) consécutives au moins d'un sous-groupe sont espacées d'une valeur constante, fonction de la hauteur desdités lamelles et
  • que les différentes lamelles (1) consécutives au moins dudit sous-groupe sont disposées d'une manière parallèle entre elles et orientées selon une même direction.
According to the invention:
  • each lamella has two faces having similar optical characteristics;
  • the two faces are parallel to each other and their generatrix is orthogonal to the longitudinal axis of the light source;
  • the profile of the cross section of a constant thickness delimited by the two faces (1a) and (1b), is constituted by a curvature to define a concave-shaped face and a convex-shaped face, in order to distribute the luminous flux and to reduce the luminance of the vertical plane considered along the longitudinal axis, in favor of the luminance in the transverse plane as well as in the intermediate planes
  • the consecutive lamellae (1) of at least one subgroup are spaced by a constant value, a function of the height of said lamellae and
  • that the successive lamellae (1) consecutive at least of said subgroup are arranged in a manner parallel to each other and oriented in the same direction.

Un autre problème que se propose de résoudre l'invention est de répartir le flux lumineux de manière à se rapprocher d'une répartition de révolution autour de l'axe vertical du luminaire, étant rappelé que la répartition du flux lumineux, dans le cas où la source lumineuse est constituée par une lampe tubulaire à fluorescence, est assimilée à un tore, l'axe de cette révolution correspondant à celui de ladite lampe, c'est-à-dire horizontal dans le cas d'un luminaire installé sur un plafond.Another problem that the invention proposes to solve is to distribute the luminous flux so as to approach a distribution of revolution around the vertical axis of the luminaire, being reminded that the distribution of the luminous flux, in the case where the light source is constituted by a tubular fluorescent lamp, is likened to a torus, the axis of this revolution corresponding to that of said lamp, that is to say horizontal in the case of a luminaire installed on a ceiling .

Pour résoudre un tel problème, le profil de la section transversale délimité par les deux faces, est constitué par un arc de cercle pour définir une face de forme concave et une face de forme convexe.To solve such a problem, the profile of the cross section delimited by the two faces is constituted by a circular arc to define a concave shape face and a convex shape face.

Compte tenu des caractéristiques à la base de l'invention, le profil en section transversale de chaque lamelle peut évoluer d'un simple arc de cercle, d'une courbe autre, de droites non alignées ou d'une combinaison de ces différentes formes géométriques, en fonction notamment de l'ouverture transversale de l'optique et du défilement longitudinal souhaité et la répartition conique souhaitée.Given the basic characteristics of the invention, the cross-sectional profile of each lamella can evolve from a simple arc of a circle, from another curve, from non-aligned lines or from a combination of these different geometrical shapes. , in particular according to the transverse opening of the optical and the desired longitudinal scrolling and the desired conical distribution.

Pour optimiser le contrôle de la luminance dans tous les plans verticaux, le bord supérieur des lamelles et/ou le bord inférieur des lamelles, peut ne pas être plan.To optimize the luminance control in all vertical planes, the upper edge of the slats and / or the lower edge of the slats, may not be flat.

Les lamelles selon les caractéristiques de l'invention, sont montées en combinaison avec les réflecteurs latéraux selon différentes solutions techniques possibles :

  • soit les différentes lamelles sont espacées d'une valeur constante, fonction de la hauteur desdites lamelles ;
  • soit les différentes lamelles sont disposées en face à face pour former une succession de cellules biconvexes et biconcaves ;
  • soit les différentes lamelles sont disposées d'une manière parallèle entre elles et orientées selon une même direction ;
  • soit les différentes lamelles sont disposées d'une manière parallèle entre elles en formant des sous-groupes symétriques par rapport au centre de l'optique.
The slats according to the characteristics of the invention are mounted in combination with the lateral reflectors according to various possible technical solutions:
  • the different lamellae are spaced apart by a constant value, a function of the height of said lamellae;
  • either the different lamellae are arranged face to face to form a succession of biconvex and biconcave cells;
  • either the different slats are arranged in a parallel manner with each other and oriented in the same direction;
  • either the different lamellae are arranged in a manner parallel to one another forming subgroups that are symmetrical with respect to the center of the optics.

L'invention est exposée ci-après plus en détail à l'aide des figures des dessins annexés dans lesquels :

  • la figure 1 montre les abaques de Bodmann et Söllner entre les angles gamma 45° et 85° et le diagramme conique de luminance ;
  • les figures 2 et 3 sont des vues à caractère purement schématique montrant le principe du cintrage des lamelles selon l'invention, montées selon deux formes de réalisation possibles par rapport aux réflecteurs latéraux ;
  • les figures 4, 5, 6, 7, 8, 9 et 9bis sont des vues en perspectives des différentes formes de réalisation des lamelles mettant en oeuvre le principe à la base de l'invention ;
  • les figures 10, 11, 12, 13, 14 et 15 montrent le montage des différentes formes de réalisation possibles des lamelles en combinaison avec les réflecteurs latéraux des luminaires ;
  • la figure 16 montre une découpe concave du bord supérieur de la lamelle.
The invention is described below in more detail with reference to the figures of the accompanying drawings, in which:
  • the figure 1 shows the Bodmann and Söllner charts between the 45 ° and 85 ° gamma angles and the conical luminance diagram;
  • the Figures 2 and 3 are purely schematic views showing the principle of bending lamellae according to the invention, mounted in two possible embodiments relative to the side reflectors;
  • the figures 4 , 5 , 6 , 7 , 8 , 9 and 9a are perspective views of the various embodiments of the slats implementing the principle underlying the invention;
  • the figures 10 , 11 , 12 , 13 , 14 and 15 show the mounting of the different possible embodiments of the lamellae in combination with the lateral reflectors of the luminaires;
  • the figure 16 shows a concave cut of the upper edge of the lamella.

D'une manière parfaitement connue pour un homme du métier, le luminaire comprend un boîtier support recevant au moins une source de lumière sous forme par exemple d'une lampe fluorescente linéaire, en combinaison avec un ensemble optique.In a manner perfectly known to those skilled in the art, the luminaire comprises a support housing receiving at least one light source in the form of, for example, a linear fluorescent lamp, in combination with an optical assembly.

Selon les figures des dessins, seul l'ensemble optique est illustré. Ce dernier est du type de ceux présentant, de manière connue, deux réflecteurs latéraux (R1) et (R2) recevant transversalement une pluralité de lamelles (1). Les lamelles et les réflecteurs sont avantageusement réalisés en aluminium brillant ou satiné de très faible épaisseur, ou en plastique aluminé, ou en tôle de faible épaisseur peinte.According to the figures of the drawings, only the optical assembly is illustrated. The latter is of the type having, in known manner, two lateral reflectors (R1) and (R2) transversely receiving a plurality of lamellae (1). The lamellae and the reflectors are advantageously made of glossy or satin-finished aluminum of very small thickness, or of alumina plastic, or of painted thin sheet metal.

Selon l'invention, chaque lamelle (1) présente deux faces (1a) et (1b) avec des caractéristiques et des propriétés optiques de réflexion identiques ou, à tout le moins, similaires. L'une des faces (1a) est de forme concave, tandis que l'autre face (1b) est de forme convexe en présentant des génératrices verticales parallèles entre elles disposées orthogonalement à l'axe longitudinal de la lampe, généralement disposée dans un plan horizontal. Plus généralement, les deux faces (1a) et (1b) présentent une section transversale dans le plan horizontal, d'une épaisseur constante et dont le profil est apte à répartir le flux lumineux et à diminuer la luminance du plan vertical considéré selon l'axe longitudinal au profit de la luminance dans le plan transversal, ainsi que dans les plans intermédiaires.According to the invention, each lamella (1) has two faces (1a) and (1b) with identical and, at the very least, similar reflective characteristics and properties. One of the faces (1a) is of concave shape, while the other face (1b) is of convex shape by presenting vertical generatrices parallel to each other arranged orthogonally to the longitudinal axis of the lamp, generally arranged in a horizontal plane. More generally, the two faces (1a) and (1b) have a cross section in the horizontal plane, of constant thickness and whose profile is capable of distributing the luminous flux and decreasing the luminance of the vertical plane considered according to the longitudinal axis in favor of the luminance in the transverse plane, as well as in the intermediate planes.

Les lamelles (1) présentent une courbure en forme d'arc de cercle ou autre courbe (figures 4, 6, 7 et 8), ou bien chaque lamelle peut être constituée d'au moins deux plans (1c) et (1d) disposés angulairement l'un par rapport à l'autre (figures 9 et 9bis).The lamellae (1) have a curvature in the shape of an arc or other curve ( figures 4 , 6 , 7 and 8 ), or each lamella may consist of at least two planes (1c) and (1d) arranged angularly with respect to each other ( figures 9 and 9a ).

A la figure 8, la lamelle (1) est composé de deux profils (1e) et (1f) décalés en hauteur et de rayon de courbure opposé, en étant réunis de manière diamétrale au moyen d'agencements (1g) apte à assurer le montage des lamelles par rapport aux réflecteurs latéraux (R1) et (R2). Bien évidemment, chaque lamelle (1), quelle que soit sa forme de réalisation, présente, au niveau de ses bords verticaux, des agencements (1g) qui peuvent être de tout type connu et approprié, par exemple sous forme d'ergots, aptes à être engagés dans des ouvertures correspondantes formées dans l'épaisseur des réflecteurs latéraux.To the figure 8 , the strip (1) is composed of two profiles (1e) and (1f) offset in height and of opposite radius of curvature, being diametrically joined by means of arrangements (1g) suitable for mounting the strips by relative to the lateral reflectors (R1) and (R2). Of course, each strip (1), whatever its embodiment, has, at its vertical edges, arrangements (1g) which can be of any known and appropriate type, for example in the form of lugs, suitable to be engaged in corresponding openings formed in the thickness of the side reflectors.

A partir de cette conception de base des lamelles (1), ces dernières peuvent être montées en combinaison avec les réflecteurs (R1) et (R2) selon différents agencements, en observant toutefois que les différentes lamelles, quelle que soit leur orientation, sont espacées selon une distance constante (x) en fonction de la hauteur desdites lamelles qui est déterminée pour réduire les valeurs de luminance dans le plan vertical longitudinal de l'optique conformément aux limites souhaitées, afin d'ajuster les valeurs de luminance dans les autres plans verticaux et jusqu'au plan transversal comme indiqué. On renvoie aux figures 2 et 3.From this basic design slats (1), they can be mounted in combination with the reflectors (R1) and (R2) in different arrangements, observing however that the different slats, whatever their orientation, are spaced apart at a constant distance (x) as a function of the height of said lamellae which is determined to reduce the luminance values in the vertical longitudinal plane of the optics according to the desired limits, in order to adjust the luminance values in the other vertical planes and up to the transverse plane as indicated. We refer to Figures 2 and 3 .

Par exemple, les différentes lamelles (1) sont disposées en vis à vis, pour former une succession de cellules bi-convexes et bi-concaves (figure 11). Chaque cellule est composée de lamelles jointives ou non, ou de lamelles croisées. Les différentes lamelles (1) peuvent également être disposées d'une manière parallèle entre elles et orientées selon une même direction.
Ou bien les différentes lamelles (1) sont disposées d'une manière parallèle entre elles en formant des sous-groupes symétriques par rapport au centre de l'optique (figures 10 et 12).For example, the different lamellae (1) are arranged facing each other, to form a succession of bi-convex and bi-concave cells ( figure 11 ). Each cell is composed of contiguous lamellae or not, or cross lamellae. The different slats (1) can also be arranged in a parallel manner and oriented in the same direction.
Or the different lamellae (1) are arranged in a manner parallel to one another forming subgroups that are symmetrical with respect to the center of the optics ( figures 10 and 12 ).

La figure 13 montre un ensemble optique dont les réflecteurs latéraux sont équipés de lamelles conformes à celles illustrées figure 8 formant deux groupes symétriques par rapport au centre de l'optique.The figure 13 shows an optical assembly whose lateral reflectors are equipped with slats conforming to those illustrated figure 8 forming two groups symmetrical with respect to the center of the optics.

Les figures 14 et 15 montrent un ensemble optique dont les réflecteurs latéraux sont équipés de lamelles respectivement conformes au modes d'exécution illustrés figures 9 et 9bis.The figures 14 and 15 show an optical assembly whose lateral reflectors are equipped with lamella respectively according to the illustrated embodiments figures 9 and 9a .

Les bords supérieur et/ou inférieur des lamelles sont rectilignes ou peuvent présenter un rayon de courbure (concave par exemple, figure 16).
Les avantages ressortent bien de la description, en particulier on souligne et on rappelle :

  • les lamelles ne se touchent pas entre elles dans la section longitudinale verticale de la lampe assurant un défilement régulier dans ce plan ;
  • les faces concaves et convexes des lamelles assurent des réflexions identiques par rapport à la verticale sur les deux faces ;
  • la maîtrise de l'éblouissement en maintenant la luminance dans des valeurs inférieures aux limites des abaques de Bodmann et Söllner dans les plans verticaux.
The upper and / or lower edges of the lamellae are rectilinear or may have a radius of curvature (concave for example, figure 16 ).
The advantages stand out well from the description, in particular one underlines and recalls:
  • the slats do not touch each other in the vertical longitudinal section of the lamp ensuring a smooth scrolling in this plane;
  • the concave and convex faces of the lamellae provide identical reflections with respect to the vertical on both sides;
  • the control of glare by keeping the luminance in values below the limits of the Bodmann and Söllner charts in the vertical planes.

Claims (4)

  1. Lamp comprising a support housing receiving at least one tubular, linear source of light in combination with an optical assembly longitudinally delimiting lateral reflectors transversally receiving a plurality of reflecting blades (1),
    - of which each blade (1) has two parallel faces (1a) and (1b) between them and having similar optical characteristics;
    - the generators of the two faces (1a) and (1b) being orthogonal to the longitudinal axis of the source of light and
    - the profile of the transversal section of a constant thickness delimited by the two faces (1a) and (1b) is constituted by a curve in order to define a face of a concave shape and a face of a convex shape for the purpose of distributing the luminous flux and reducing the brilliance of the vertical plane considered according to the longitudinal axis, for the benefit of the brilliance in the transversal plane as well as in the intermediary planes,
    characterised in that
    the different consecutive blades (1) at least of one sub-group are spaced out by a constant value, as a function of the height of said blades and that the different consecutive blades (1) at least of said sub-group are arranged in a parallel manner between them and oriented according to a same direction.
  2. Lamp according to claim 1, characterised in that the different blades (1) are arranged in a parallel manner between them by forming sub-groups which are symmetrical relative to the optical centre.
  3. Lamp according to claim 1 or 2, characterised in that the profile of the transversal section delimited by the two faces (1a) and (1b) is constituted by a circular arc.
  4. Lamp according to one of the preceding claims, characterised in that the blades (1) are advantageously produced from brilliant or satin-finish aluminium of a very small thickness or from aluminised plastic or from painted sheet metal of a small thickness.
EP04300920A 2004-12-20 2004-12-20 Luminaire with a plurality of reflecting louvre slats Not-in-force EP1672274B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE602004012584T DE602004012584T2 (en) 2004-12-20 2004-12-20 Luminaire with a plurality of reflective slats
AT04300920T ATE389848T1 (en) 2004-12-20 2004-12-20 LUMINAIRE WITH A MULTIPLE REFLECTIVE SLATS
EP04300920A EP1672274B1 (en) 2004-12-20 2004-12-20 Luminaire with a plurality of reflecting louvre slats

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04300920A EP1672274B1 (en) 2004-12-20 2004-12-20 Luminaire with a plurality of reflecting louvre slats

Publications (2)

Publication Number Publication Date
EP1672274A1 EP1672274A1 (en) 2006-06-21
EP1672274B1 true EP1672274B1 (en) 2008-03-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04300920A Not-in-force EP1672274B1 (en) 2004-12-20 2004-12-20 Luminaire with a plurality of reflecting louvre slats

Country Status (3)

Country Link
EP (1) EP1672274B1 (en)
AT (1) ATE389848T1 (en)
DE (1) DE602004012584T2 (en)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2411952A (en) * 1944-09-09 1946-12-03 Day Brite Lighting Inc Overhead electric lighting fixture
GB892536A (en) * 1958-08-08 1962-03-28 A E I Lamp And Lighting Compan Improvements relating to lighting fittings
FR2831649B1 (en) * 2001-10-26 2004-02-13 Sli France LUMINAIRE COMPRISING THREE-DIMENSIONAL SLATS FOR LUMINANCE CONTROL
FR2554549B1 (en) * 1983-11-03 1988-03-11 Sabir ANTI-GLARE DEVICE FOR LUMINAIRES WITH LINEAR SOURCES
DE4109492C2 (en) * 1991-03-22 2000-06-08 Parol Leuchtenkomponenten Gmbh Luminaire louvre for louvre luminaires equipped with discharge lamps
FR2734044B1 (en) * 1995-05-11 1997-08-01 Vial Henri Noel SCREEN GRID FOR FLUORESCENT LIGHTING
DE69933410T2 (en) * 1998-05-19 2007-08-02 Koninklijke Philips Electronics N.V. lamp
US6558023B2 (en) * 2001-01-05 2003-05-06 Stefano Casciani Luminaire which provides an evenly distributed lighting pattern
DE20205722U1 (en) * 2002-04-11 2002-07-04 Graf, Ekkehard, 42499 Hückeswagen Reflector for an elongated light source and a lamp with an elongated lamp

Also Published As

Publication number Publication date
EP1672274A1 (en) 2006-06-21
DE602004012584T2 (en) 2009-04-16
DE602004012584D1 (en) 2008-04-30
ATE389848T1 (en) 2008-04-15

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