EP3220044A1 - Linear lighting device with linear lens and side flanges for light diffusion - Google Patents

Linear lighting device with linear lens and side flanges for light diffusion Download PDF

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Publication number
EP3220044A1
EP3220044A1 EP17305287.9A EP17305287A EP3220044A1 EP 3220044 A1 EP3220044 A1 EP 3220044A1 EP 17305287 A EP17305287 A EP 17305287A EP 3220044 A1 EP3220044 A1 EP 3220044A1
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EP
European Patent Office
Prior art keywords
linear
face
lighting device
light
flat
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Granted
Application number
EP17305287.9A
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German (de)
French (fr)
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EP3220044B1 (en
Inventor
Jérome Fourot
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Europhane SA
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Novaday
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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
    • F21V5/04—Refractors for light sources of lens shape
    • F21V5/043—Refractors for light sources of lens shape the lens having cylindrical faces, e.g. rod lenses, toric lenses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S4/00—Lighting devices or systems using a string or strip of light sources
    • F21S4/20—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports
    • F21S4/28—Lighting devices or systems using a string or strip of light sources with light sources held by or within elongate supports rigid, e.g. LED bars
    • 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
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to the technical field of lighting using light emitting diode (LED) light-emitting diode (LED) sources.
  • the invention relates more particularly to so-called linear LED lighting devices intended to be a substitute for lighting systems using fluorescent linear tubes with mercury vapor or other.
  • Fluorescent tube lighting such as, for example, used inside industrial buildings, especially in storage warehouses, production halls or supermarkets, uses luminaires fixed in height and aligned to illuminate spans. Each luminaire then comprises one, two or three parallel linear fluorescent tubes. These inexpensive luminaires effectively produce light, but do not provide satisfactory illumination at ground level or in a volume between the ground and a height of several meters given the height at which the luminaires are typically located from 4m to a dozen meters and how the tubes emit light on their entire periphery. Moreover, these luminaires do not make it possible to obtain an optimized electrical energy consumption and induce disturbances of the power supply networks to which they are connected because of their mode of operation and the systems used when they are switched on.
  • each diode with an individual optical system, said secondary lens which focuses and focuses the light, for example in a cone having an apex angle of about 20 ° to 30 ° or 80 to 90 °, so as to obtain the desired floor lighting.
  • each diode greatly increases the manufacturing cost of the luminaire which can be prohibitive for lighting in industrial environment in particular.
  • it is not always necessary to illuminate the ground just below and in the axis of the luminaire, but it may be desirable to illuminate an area located on the side, offset laterally in relation to the area above and in line with the luminaire.
  • the eye having a significant resolution ability even at long distance, a lens per diode is visible as a discrete light point and negatively impacts the perception of glare.
  • the central part of the linear lens makes it possible to obtain a concentration of light capable of producing lighting in accordance with the standards in force, in particular for the lighting of storage magazines, production halls, supermarkets, circulations and office spaces in buildings. tertiary.
  • the presence of the lateral wings, which border the linear lens incorporated in the cover substantially attenuates the glare of an observer of the lighting device by increasing the width of the "perceived light source" or seen by the observer.
  • the lateral wings form light guides which, on the one hand, recover and diffuse the light emitted laterally by the diodes constituting the light source in the sense of the invention and which, on the other hand, diffuses the light having undergone one or more reflections inside the hood.
  • the lighting device according to the invention may comprise several linear light sources distant from each other and comprise a linear lens in relation to each linear light source.
  • Each linear lens is then bordered by two lateral wings and two adjacent linear lenses are then connected by at least one lateral wing.
  • the outer face or emission hood is symmetrical with respect to a sagittal plane.
  • the internal face or the receiving face of the cover is symmetrical with respect to the sagittal plane.
  • the outer face may be symmetrical with respect to the invention while the inner face is not and vice versa.
  • the inner and outer faces may not be symmetrical with respect to the sagittal plane, neither one nor the other.
  • the planes of the flat lateral parts of the cover form a flat angle.
  • the wings have a thickness of between 1 mm and 10 mm.
  • This range of values advantageously makes it possible to achieve different aesthetic effects on the wings. Indeed, when the thickness of the wings tends to 1 mm, we favor a plane aspect of said wings. Conversely, when the thickness of the wings tends to 10 mm, one favors an aspect of depth at the level of each wing.
  • a greater thickness allows the integration of elements and / or the formation of asperities in the wings to create other aesthetic effects.
  • the concave central region of the receiving face has a depth less than the thickness of the wings. This particular embodiment allows a better transmission of light from the central region to the wings.
  • the wings extend away from the central part or region by a lateral segment forming an obtuse angle, preferably greater than or equal to 130 °, with the corresponding wing so that the segments converge towards the receiving face of the linear lens.
  • the implementation of these side segments can further reduce the glare effect by extending the side portions.
  • the lateral segments contribute to reflect light from the protruding central portion.
  • the obtuse angle, formed by a lateral segment with a wing thus promotes a greater light emission by the lighting device, towards an observer facing said device. Therefore, for the same given power, a transmission device according to the invention is perceived as a wider and more intense light source by an observer, without dazzling said observer.
  • the width of the concave region of the reception face, measured at the connection with the flat lateral parts is less than or equal to, preferably less than, the width of the protuberant convex portion of the the emission face measured at the connection with the flat lateral parts.
  • the central part of the emission face has a height measured from the flat lateral parts of the emission face greater than 4 times the thickness of the lateral wings.
  • a height measured from the flat lateral parts of the emission face greater than 4 times the thickness of the lateral wings.
  • Such a height makes it possible to better condition the light resulting from the light-emitting diodes by making it possible to promote a greater diffusion of light in the central part than in the lateral wings. More specifically, if one tends to increase the value of this ratio, it promotes a greater amount of light emission at the central portion. Conversely, when we move towards a value of 4, a larger amount of light to diffuse into the side portions, which promotes a wider and homogeneous appearance of the light emitted by the lighting device.
  • the concave central region of the receiving face has a radius of curvature greater than or equal to twice the thickness of the lateral wings.
  • the convex central convex region of the emission face has, in transverse cross section, an elliptical shape with the major axis substantially orthogonal to the flat lateral parts.
  • Such a shape of the protruding portion allows a concentration of at least 75% of the light from the diodes in an angular sector of a value between 20 ° and 120 °.
  • the protruding central region of the emission face comprises, in transverse cross-section, two circular parts connecting at a concave central groove of depth less than the thickness of the region.
  • Such a shape of the protruding portion allows a concentration of at least 75% of the light from the diodes two lighting sectors each having in a plane transverse to the axis of alignment of the diodes an acute apex angle and, by example, between 10 ° and 30 ° and whose axis or bisector forms an acute angle with the sagittal plane S.
  • the radius of curvature of each circular portion is between 2 times and 6 times the thickness of the lateral wings.
  • the linear source of light comprises several longitudinal rows of parallel light-emitting diodes.
  • a lighting device according to the invention may be qualified linear lighting device insofar as it has a linear light source E comprising one or more rows R of light emitting diodes and / or wired.
  • a linear lighting device according to the invention generally has a length very much greater than the width of the lighting device without the invention excluding an embodiment of the lighting device in which it has a width very close to its width. length by the implementation of a sufficient amount of row of light emitting diodes.
  • the linear qualifier is nonetheless relevant insofar as it relates to the alignment direction of the rows of light-emitting diodes.
  • the linear lighting device 1 comprises an elongate body 2 which extends along a longitudinal axis L.
  • the elongated body 2 defines at least one receiving surface 3 of at least one substrate 4 carrying at least one row R of light-emitting diodes 5 according to the illustrated example, the elongate body 2 comprises a single receiving surface 3 which is substantially centered with respect to the elongate body 2 and on which is fitted a single substrate 4 carrying a single row R
  • the substrate 4 may, for example, comprise a printed circuit board, in which the light-emitting diodes 5 are soldered. Of course, the substrate 4 may be made in any other suitable manner to ensure the mechanical strength of the light emitting diodes 5 and their power supply.
  • each light-emitting diode 5 is associated, as is more particularly apparent from the figure 2 to a primary lens 6 which has a convex transmitting face 7, it being understood that the transmitting face 7 could also to be flat.
  • each light emitting diode 5 is devoid of individual secondary lens. It should be noted that according to the invention the diodes 5 do not necessarily include a primary lens.
  • the elongate body 2 comprises two planar reflectors 10 located on either side of the receiving face 3.
  • the two planar reflectors 10 extend parallel to the longitudinal axis L and form one with the other and according to the example shown, a flat angle or 180 °.
  • the elongated body 2 defines with the receiving surface 3 and the planar reflectors 10 a lighting chamber 11 in which the array of light-emitting diodes R, constituting the linear source E, is intended to be partly at least enclosed.
  • the lighting device according to the invention also comprises an elongated linear hood 20 which at least partly closes the lighting chamber 11.
  • the hood 20 is also intended to let in or diffuse the light emitted by each linear source E.
  • the cover 20 is made of an at least translucent and preferably transparent material such as for example a plastic material such as polymethyl methacrylate (PMMA), polyethylene terephthalate (PET) or polypropylene (PP) without this list being neither exhaustive nor exhaustive.
  • PMMA polymethyl methacrylate
  • PET polyethylene terephthalate
  • PP polypropylene
  • the cover 20 is also adapted to ensure a conditioning of the light emitted by the linear source E so as to direct and concentrate it, in this case, according to a lobe or lighting sector symmetrical with respect to a sagittal plane S.
  • the cover 20 forms, in relation to each linear light source E, a linear lens 21 parallel to the longitudinal axis L of the body 2.
  • the cover 2 comprises a single linear lens 21.
  • each linear lens 21 comprises an external light emitting face 22 which is, according to the illustrated example, symmetrical with respect to the sagittal plane S substantially parallel to the longitudinal axis L.
  • the sagittal plane S forms a plane of symmetry of the illumination chamber 11, the reflectors 10 then being the image of one another with respect to the sagittal plane S.
  • the linear lens 21 also has an inner face 23 for receiving the light of the light-emitting diodes 5 located opposite the external light-emitting face 22 of the light-emitting diodes 5.
  • the linear lens 21 as a whole provides a transmission light emitted by said diodes 5.
  • the outer face 22 of light emission could also be designated simply as the front face or outer face of the hood while the receiving face 23 could be described simply as rear face or internal face.
  • the outer face 22 has, in cross section, a central portion 24 of generally convex and protuberant, preferably smooth, bordered by two flat lateral portions 25, preferably smooth.
  • the planes of the flat lateral portions 25 form an obtuse angle.
  • the planar portions 25 form a flat angle.
  • the receiving face 23 is, for its part, shaped so as to comprise a central region 30 at least partially concave located facing the protruding central region 24 of the outer face 22 to form, according to the illustrated example, a system optical providing a concentration of a light portion emitted by the diodes in an angular sector symmetrical with respect to the sagittal plane S of a value between 20 ° and 120 °.
  • the central parts of the receiving and transmitting faces together define the linear lens 21.
  • the receiving face 23 also comprises two flat lateral portions 31 substantially parallel to the flat lateral parts 25 of the emission face 23 to form two lateral wings 32 of light scattering.
  • the lateral wings 32 form two light guides which have a thickness e of between 1 mm and 10 mm.
  • the wings extend away from the central portion or region 21 by a lateral segment 33 forming an obtuse angle, preferably greater than or equal to 130 °, with the corresponding wing so that the segments 33 converge towards the receiving face 23 of the linear lens.
  • the flat lateral faces 31 of the reception face 23 may be associated with reflectors, receive a reflective coating or may comprise texturing or micro-primes or micro-conformation inducing reflection. light. It is the same for the internal faces of the lateral segments 33.
  • the central region 30 of the receiving face defines a cavity 50 for receiving the diodes forming the light source.
  • each edge of the central region 30 forms with the corresponding flat part 31 an angle, measured inside the linear lens, greater than or equal to 100 ° and preferably greater than 110 °.
  • the concave central region 30 of the receiving face 23 has a depth less than the thickness of the wings and a radius of curvature greater than or equal to twice the thickness of the lateral wings.
  • the width L 'of the concave region of the receiving face, measured at the connection with the flat lateral portions 31, is less than or equal to, preferably less than, the width L "of the protruding convex portion 24 of the emission face measured at the connection with the plane lateral parts 25.
  • each edge of the protruding central portion 24 forms with the corresponding flat part an angle, measured outside the linear lens, less than or equal to 95 °.
  • the protruding central portion 24 of the emission face 22 has a height H measured from the flat lateral parts of the emission face greater than 4 times the thickness e of the lateral wings 32.
  • the protruding central region 24 of the emission face has, in cross section, an elliptical general shape with a major axis A substantially orthogonal to the flat lateral portions 25. The width L "of the part protuberant is then smaller than the length of the minor axis A. It should be noted that the ellipse forming the protruding central portion is truncated at the level of its connection with the wings.
  • a linear lighting device makes it possible to redirect a large part of the light emitted by the diodes in a preferred direction parallel to the sagittal plane S in an angular sector of between 20 ° and 120 °. °.
  • the lighting device described above in connection with the Figures 1 to 3 comprises a linear light source E formed of a single row R of light-emitting diodes.
  • the linear light source E could comprise several rows of juxtaposed point or wire electrodes R.
  • the figure 4 illustrates a variant of the lighting device, according to the invention, which differs from that described in relation to the Figures 1 to 3 in that the protruding central region of the emission face comprises, in transverse cross-section, two circular portions 40 connected at a central groove concave 41 of lower depth and preferably much lower than the height of the central region 24 so that the general shape of the protruding central region can always be described as convex.
  • the radius of curvature of each circular portion 40 is between 2 times and 6 times the thickness e of the lateral wings 32.
  • Such a conformation of the linear lens makes it possible to direct the light issuing from the light-emitting diodes according to two main lobes or illumination sectors arranged symmetrically with respect to the sagittal plane S.
  • linear lighting devices can be associated in various combinations to form a luminaire.

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Abstract

L'invention concerne un dispositif d'éclairage linéaire à diodes électroluminescentes comprenant une lentille linéaire (21), au moins translucide, d'axe longitudinal parallèle à l'axe longitudinal (L) du corps (2), avec une face externe d'émission (22) de la lumière et une face interne de réception (23) de la lumière des diodes (5), dont €• la face d'émission (22), vue en section droite transversale, possède une partie centrale (24) de forme générale convexe et protubérante bordée par deux parties latérales planes, chaque bord de la partie centrale formant avec la partie plane correspondante un angle, mesuré à l'extérieur de la lentille linéaire, inférieur ou égal à 95°, et €• la face de réception (23), vue en section droite transversale, comprend : €• une région centrale (30) en partie au moins concave située en regard de la région centrale de la face d'émission pour former une cavité d'accueil des diodes, deux parties latérales planes sensiblement parallèles aux parties latérales planes de la face d'émission pour former deux ailes (32) latérales de diffusion de la lumière qui bordent la lentille linéaire (21), chaque bord de la région centrale formant avec la partie plane correspondante un angle, mesuré à l'intérieur de la lentille linéaire, supérieur ou égal à 100° et de préférence supérieur à 110°.The invention relates to a linear light-emitting diode lighting device comprising a linear lens (21), at least translucent, with a longitudinal axis parallel to the longitudinal axis (L) of the body (2), with an outer face of. emission (22) of the light and an internal face (23) for receiving the light of the diodes (5), of which € • the emission face (22), seen in transverse cross section, has a central part (24) of generally convex and protruding shape bordered by two flat lateral parts, each edge of the central part forming with the corresponding flat part a angle, measured outside the linear lens, less than or equal to 95 °, and € • the receiving face (23), seen in cross section, includes: € • a central region (30) at least partly concave located opposite the central region of the emission face to form a receiving cavity for the diodes, two flat lateral parts substantially parallel to the flat lateral parts of the emitting face to form two lateral light diffusing wings (32) which border the linear lens (21), each edge of the central region forming with the corresponding flat part an angle, measured inside the linear lens, greater than or equal to 100 ° and preferably greater than 110 °.

Description

La présente invention concerne le domaine technique de l'éclairage au moyen de sources lumineuses à diodes électroluminescentes en abrégé LED pour en anglais « Light-Emitting Diode ». L'invention se rapporte plus particulièrement aux dispositifs d'éclairage à LED dit linéaires destinés à venir se substituer aux systèmes d'éclairage mettant en oeuvre des tubes fluorescents linéaires à vapeur de mercure ou autre.The present invention relates to the technical field of lighting using light emitting diode (LED) light-emitting diode (LED) sources. The invention relates more particularly to so-called linear LED lighting devices intended to be a substitute for lighting systems using fluorescent linear tubes with mercury vapor or other.

Un éclairage à tubes fluorescents tel que, par exemple, utilisé à l'intérieur des bâtiments industriels notamment dans les entrepôts de stockage, dans des halls de production ou supermarchés, met en oeuvre des luminaires fixés en hauteur, et alignés pour éclairer des travées. Chaque luminaire comprend alors un, deux voire trois tubes fluorescents linéaires parallèles. Ces luminaires peu chers permettent effectivement de produire de la lumière, mais de permettent pas d'obtenir un éclairage satisfaisant au niveau du sol ou dans un volume compris entre le sol et une hauteur de plusieurs mètres compte tenu de la hauteur à laquelle les luminaires sont généralement situés, de 4 m à une douzaine de mètres et de la façon dont les tubes émettent de la lumière sur toute leur périphérie. De plus, ces luminaires ne permettent pas d'obtenir une consommation d'énergie électrique optimisée et induisent des perturbations des réseaux d'alimentation électrique auxquels ils sont raccordés en raison de leur mode de fonctionnement et des systèmes mis en oeuvre à leur allumage.Fluorescent tube lighting such as, for example, used inside industrial buildings, especially in storage warehouses, production halls or supermarkets, uses luminaires fixed in height and aligned to illuminate spans. Each luminaire then comprises one, two or three parallel linear fluorescent tubes. These inexpensive luminaires effectively produce light, but do not provide satisfactory illumination at ground level or in a volume between the ground and a height of several meters given the height at which the luminaires are typically located from 4m to a dozen meters and how the tubes emit light on their entire periphery. Moreover, these luminaires do not make it possible to obtain an optimized electrical energy consumption and induce disturbances of the power supply networks to which they are connected because of their mode of operation and the systems used when they are switched on.

Avec le développement des diodes électroluminescentes, les luminaires à tubes fluorescents linéaires sont remplacés par des luminaires linéaires à diodes électroluminescentes. Afin d'assurer un éclairage au sol de qualité, lorsque le luminaire est situé à une grande hauteur, il est proposé d'associer chaque diode à un système optique individuel, dit lentille secondaire qui concentre et focalise la lumière, par exemple dans un cône ayant un angle au sommet d'environ 20° à 30° ou 80 à 90°, de manière à obtenir l'éclairage au sol recherché.With the development of light-emitting diodes, luminaires with linear fluorescent tubes are replaced by linear luminaires with light-emitting diodes. In order to ensure quality ground lighting, when the luminaire is located at a great height, it is proposed to associate each diode with an individual optical system, said secondary lens which focuses and focuses the light, for example in a cone having an apex angle of about 20 ° to 30 ° or 80 to 90 °, so as to obtain the desired floor lighting.

Cependant, la mise en oeuvre des systèmes optiques individuels associés à chaque diode renchérit fortement le coût de fabrication du luminaire ce qui peut être rédhibitoire pour les éclairages en milieu industriel notamment. Par ailleurs, dans certaines configurations de mise en oeuvre, il n'est pas toujours besoin d'éclairer le sol juste en dessous et dans l'axe du luminaire, mais il peut être souhaitable d'éclairer une zone située sur le côté, décalée latéralement par rapport à la zone située à l'aplomb et dans l'axe du luminaire. De plus, l'oeil ayant une capacité de résolution importante même à grande distance, une lentille par diode est visible comme un point lumineux discret et impacte négativement la perception d'éblouissement.However, the implementation of individual optical systems associated with each diode greatly increases the manufacturing cost of the luminaire which can be prohibitive for lighting in industrial environment in particular. Moreover, in some implementation configurations, it is not always necessary to illuminate the ground just below and in the axis of the luminaire, but it may be desirable to illuminate an area located on the side, offset laterally in relation to the area above and in line with the luminaire. In addition, the eye having a significant resolution ability even at long distance, a lens per diode is visible as a discrete light point and negatively impacts the perception of glare.

Il est donc apparu le besoin, d'un nouveau type de dispositif d'éclairage linéaire adapté pour assurer un éclairage satisfaisant, notamment à partir d'une grande hauteur dans l'axe du luminaire ou de manière décalée par rapport à cet axe, en offrant un rendu esthétique satisfaisant et limitant l'éblouissement d'un observateur cela tout en présentant un coût de fabrication très nettement inférieur à celui des luminaires comprenant un système optique de concentration de la lumière associé à chaque diode électroluminescente.It has therefore appeared the need for a new type of linear lighting device adapted to ensure satisfactory illumination, especially from a great height in the axis of the luminaire or offset from this axis, in providing a satisfactory aesthetic rendering and limiting the glare of an observer while having a manufacturing cost very much lower than that of the luminaires comprising an optical system of concentration of the light associated with each light emitting diode.

Afin d'atteindre cet objectif, l'invention concerne un dispositif d'éclairage linéaire à diodes électroluminescentes comprenant au moins :

  • un corps allongé comprenant au moins une surface de réception d'au moins un substrat portant une source linéaire de lumière comprenant au moins une rangée de diodes électroluminescentes alignées selon un axe longitudinal du corps et délimitant, en partie au moins, au moins une chambre d'éclairage linéaire allongée dans laquelle les diodes sont situées,
  • un capot linéaire allongé fermant la chambre d'éclairage,
caractérisé en ce que le capot forme, en relation avec la source linéaire, une lentille linéaire, au moins translucide, d'axe longitudinal parallèle à l'axe longitudinal du corps, avec une face externe d'émission de la lumière et une face interne de réception de la lumière des diodes, dont
  • la face d'émission, vue en section droite transversale, possède une partie centrale de forme générale convexe et protubérante bordée par deux parties latérales planes, chaque bord de la partie centrale formant avec la partie plane correspondante un angle, mesuré à l'extérieur de la lentille linéaire, inférieur ou égal à 95°, et
  • la face de réception, vue en section droite transversale, comprend :
    • une région centrale en partie au moins concave située en regard de la région centrale de la face d'émission pour former une cavité d'accueil des diodes,
    • deux parties latérales planes sensiblement parallèles aux parties latérales planes de la face d'émission pour former deux ailes latérales de diffusion de la lumière qui bordent la lentille linéaire, chaque bord de la région centrale formant avec la partie plane correspondante un angle, mesuré à l'intérieur de la lentille linéaire, supérieur ou égal à 100° et de préférence supérieur à 110°.
In order to achieve this objective, the invention relates to a linear lighting device with light-emitting diodes comprising at least:
  • an elongated body comprising at least one receiving surface of at least one substrate carrying a linear light source comprising at least one row of light-emitting diodes aligned along a longitudinal axis of the body and delimiting, in part at least, at least one chamber of elongated linear illumination in which the diodes are located,
  • an elongated linear hood closing the lighting chamber,
characterized in that the hood forms, in relation to the linear source, a linear lens, at least translucent, having a longitudinal axis parallel to the longitudinal axis of the body, with an external light emitting face and an inner face receiving light from the diodes, of which
  • the emission face, seen in transverse cross section, has a central portion of generally convex and protruding shape bordered by two flat lateral parts, each edge of the central part forming with the corresponding flat part an angle, measured outside the the linear lens, less than or equal to 95 °, and
  • the receiving face, seen in cross section, comprises:
    • a central region at least partially concave located opposite the central region of the emission face to form a cavity for receiving the diodes,
    • two flat lateral portions substantially parallel to the flat lateral portions of the emission face to form two lateral light diffusion wings which border the linear lens, each edge of the central region forming with the corresponding flat part an angle, measured inside the linear lens, greater than or equal to 100 ° and preferably greater than 110 °.

La partie centrale de la lentille linéaire permet d'obtenir une concentration de la lumière susceptible de produire un éclairage conforme aux normes en vigueur notamment pour les éclairages des magasins de stockage, halls de production, supermarchés, circulations et des espaces de bureau dans les bâtiments tertiaires. Par ailleurs, la présence des ailes latérales, qui bordent la lentille linéaire incorporée au capot, permet d'atténuer substantiellement l'éblouissement d'un observateur du dispositif d'éclairage en augmentant la largeur de la « source de lumière perçue » ou vue par l'observateur. En effet, les ailes latérales forment des guides de lumière qui, d'une part, récupèrent et diffusent la lumière émise latéralement par les diodes constitutives de la source de lumière au sens de l'invention et qui, d'autre part diffuse la lumière ayant subi une ou plusieurs réflexions à l'intérieur du capot. Il doit être remarqué que le dispositif d'éclairage selon l'invention peut comporter plusieurs sources de lumière linéaire distantes les unes des autres et comprendre une lentille linéaire en relation avec chaque source de lumière linéaire. Chaque lentille linéaire est alors bordée par deux ailes latérales et deux lentilles linéaires adjacentes sont alors reliées par au moins une aile latérale.The central part of the linear lens makes it possible to obtain a concentration of light capable of producing lighting in accordance with the standards in force, in particular for the lighting of storage magazines, production halls, supermarkets, circulations and office spaces in buildings. tertiary. Furthermore, the presence of the lateral wings, which border the linear lens incorporated in the cover, substantially attenuates the glare of an observer of the lighting device by increasing the width of the "perceived light source" or seen by the observer. Indeed, the lateral wings form light guides which, on the one hand, recover and diffuse the light emitted laterally by the diodes constituting the light source in the sense of the invention and which, on the other hand, diffuses the light having undergone one or more reflections inside the hood. It should be noted that the lighting device according to the invention may comprise several linear light sources distant from each other and comprise a linear lens in relation to each linear light source. Each linear lens is then bordered by two lateral wings and two adjacent linear lenses are then connected by at least one lateral wing.

Selon une caractéristique non strictement nécessaire de l'invention, la face externe ou d'émission du capot est symétrique par rapport à un plan sagittal.According to a non-strictly necessary characteristic of the invention, the outer face or emission hood is symmetrical with respect to a sagittal plane.

Selon une autre caractéristique non strictement nécessaire de l'invention, la face interne ou de réception du capot est symétrique par rapport au plan sagittal. Il doit être remarqué que selon l'invention la face externe peut être symétrique par rapport à l'invention tandis que la face interne ne l'est pas et réciproquement. De même, les faces interne et externe peuvent ne pas être symétriques par rapport au plan sagittal, ni l'une ni l'autre.According to another non-strictly necessary feature of the invention, the internal face or the receiving face of the cover is symmetrical with respect to the sagittal plane. It should be noted that according to the invention the outer face may be symmetrical with respect to the invention while the inner face is not and vice versa. Similarly, the inner and outer faces may not be symmetrical with respect to the sagittal plane, neither one nor the other.

Selon une caractéristique de l'invention, les plans des parties latérales planes du capot forment un angle plat.According to one characteristic of the invention, the planes of the flat lateral parts of the cover form a flat angle.

Selon une autre caractéristique de l'invention, les ailes possèdent une épaisseur comprise entre 1 mm et 10 mm. Cette plage de valeurs permet avantageusement de réaliser des effets esthétiques différents au niveau des ailes. En effet, lorsque l'épaisseur des ailes tend vers 1 mm, on privilégie un aspect plan desdites ailes. À l'inverse, lorsque l'épaisseur des ailes tend vers 10 mm, on favorise un aspect de profondeur au niveau de chaque aile. De plus, selon un autre avantage, une plus grande épaisseur permet l'intégration d'éléments et/ou la formation d'aspérités dans les ailes afin de créer d'autres effets esthétiques.According to another characteristic of the invention, the wings have a thickness of between 1 mm and 10 mm. This range of values advantageously makes it possible to achieve different aesthetic effects on the wings. Indeed, when the thickness of the wings tends to 1 mm, we favor a plane aspect of said wings. Conversely, when the thickness of the wings tends to 10 mm, one favors an aspect of depth at the level of each wing. In addition, according to another advantage, a greater thickness allows the integration of elements and / or the formation of asperities in the wings to create other aesthetic effects.

Selon une caractéristique de l'invention, la région centrale concave de la face de réception présente une profondeur inférieure à l'épaisseur des ailes. Ce mode de réalisation particulier permet une meilleure transmission de la lumière de la région centrale vers les ailes.According to a feature of the invention, the concave central region of the receiving face has a depth less than the thickness of the wings. This particular embodiment allows a better transmission of light from the central region to the wings.

Selon une autre caractéristique de l'invention, les ailes se prolongent à l'opposé de la partie ou région centrale par un segment latéral formant un angle obtus, de préférence supérieur ou égal à 130°, avec l'aile correspondante de sorte que les segments convergent vers la face de réception de la lentille linéaire. La mise en oeuvre de ces segments latéraux permet de réduire plus encore l'effet d'éblouissement en prolongeant les parties latérales. De plus, les segments latéraux contribuent à réfléchir la lumière issue de la partie centrale protubérante. L'angle obtus, formé par un segment latéral avec une aile, favorise ainsi une plus grande émission de lumière par le dispositif d'éclairage, en direction d'un observateur faisant face audit dispositif. De ce fait, pour une même puissance donnée, un dispositif d'émission selon l'invention est perçu comme une source de lumière plus large et plus intense par un observateur, sans toutefois éblouir ledit observateur.According to another characteristic of the invention, the wings extend away from the central part or region by a lateral segment forming an obtuse angle, preferably greater than or equal to 130 °, with the corresponding wing so that the segments converge towards the receiving face of the linear lens. The implementation of these side segments can further reduce the glare effect by extending the side portions. In addition, the lateral segments contribute to reflect light from the protruding central portion. The obtuse angle, formed by a lateral segment with a wing, thus promotes a greater light emission by the lighting device, towards an observer facing said device. Therefore, for the same given power, a transmission device according to the invention is perceived as a wider and more intense light source by an observer, without dazzling said observer.

Selon une caractéristique de l'invention, la largeur de la région concave de la face de réception, mesurée au niveau du raccordement avec les parties latérales planes, est inférieure ou égale, de préférence strictement inférieure, à la largeur de la partie convexe protubérante de la face d'émission mesurée au niveau du raccordement avec les parties latérales planes.According to one characteristic of the invention, the width of the concave region of the reception face, measured at the connection with the flat lateral parts, is less than or equal to, preferably less than, the width of the protuberant convex portion of the the emission face measured at the connection with the flat lateral parts.

Selon une autre caractéristique de l'invention, la partie centrale de la face d'émission présente une hauteur mesurée à partir des parties latérales plane de la face d'émission supérieure à 4 fois l'épaisseur des ailes latérales. Une telle hauteur permet de mieux conditionner la lumière issue des diodes électroluminescentes en permettant de favoriser une diffusion plus importante de la lumière dans la partie centrale que dans les ailes latérales. Plus précisément, si on tend à augmenter la valeur de ce rapport, on favorise une plus grande quantité d'émission de la lumière au niveau de la partie centrale. À l'inverse, lorsqu'on tend vers une valeur de 4, on permet à une plus grande quantité de lumière de se diffuser dans les parties latérales, ce qui favorise un aspect plus large et homogène de la lumière émise par le dispositif d'éclairage.According to another characteristic of the invention, the central part of the emission face has a height measured from the flat lateral parts of the emission face greater than 4 times the thickness of the lateral wings. Such a height makes it possible to better condition the light resulting from the light-emitting diodes by making it possible to promote a greater diffusion of light in the central part than in the lateral wings. More specifically, if one tends to increase the value of this ratio, it promotes a greater amount of light emission at the central portion. Conversely, when we move towards a value of 4, a larger amount of light to diffuse into the side portions, which promotes a wider and homogeneous appearance of the light emitted by the lighting device.

Selon une caractéristique de l'invention, la région centrale concave de la face de réception présente un rayon de courbure supérieur ou égal à deux fois l'épaisseur des ailes latérales.According to one characteristic of the invention, the concave central region of the receiving face has a radius of curvature greater than or equal to twice the thickness of the lateral wings.

Selon une autre caractéristique de l'invention, la région centrale convexe protubérante de la face d'émission présente, en section droite transversale, une forme elliptique avec le grand axe sensiblement orthogonal aux parties latérales planes. Une telle forme de la partie protubérante permet une concentration d'au moins 75% de la lumière issue des diodes dans un secteur angulaire d'une valeur comprise entre 20° et 120°.According to another characteristic of the invention, the convex central convex region of the emission face has, in transverse cross section, an elliptical shape with the major axis substantially orthogonal to the flat lateral parts. Such a shape of the protruding portion allows a concentration of at least 75% of the light from the diodes in an angular sector of a value between 20 ° and 120 °.

Selon encore une autre caractéristique de l'invention, la région centrale protubérante de la face d'émission comprend, en section droite transversale, deux parties circulaires se raccordant au niveau d'un sillon central concave de profondeur inférieure à l'épaisseur de la région centrale. Une telle forme de la partie protubérante permet une concentration d'au moins 75% de la lumière issue des diodes deux secteurs d'éclairage présentant chacun dans un plan transversal à l'axe d'alignement des diodes un angle au sommet aigu et, par exemple, compris entre 10° et 30° et dont l'axe ou bissectrice forme un angle aigu avec le plan sagittal S.According to yet another characteristic of the invention, the protruding central region of the emission face comprises, in transverse cross-section, two circular parts connecting at a concave central groove of depth less than the thickness of the region. Central. Such a shape of the protruding portion allows a concentration of at least 75% of the light from the diodes two lighting sectors each having in a plane transverse to the axis of alignment of the diodes an acute apex angle and, by example, between 10 ° and 30 ° and whose axis or bisector forms an acute angle with the sagittal plane S.

Selon une variante de cette caractéristique, le rayon de courbure de chaque partie circulaire est compris entre 2 fois et 6 fois l'épaisseur des ailes latérales.According to a variant of this characteristic, the radius of curvature of each circular portion is between 2 times and 6 times the thickness of the lateral wings.

Selon une autre caractéristique de l'invention, la source linéaire de lumière comprend plusieurs rangées longitudinales de diodes électroluminescentes parallèles.According to another characteristic of the invention, the linear source of light comprises several longitudinal rows of parallel light-emitting diodes.

Bien entendu, les différentes caractéristiques, variantes et formes de réalisation du dispositif d'éclairage selon l'invention peuvent être associées les unes avec les autres selon diverses combinaisons dans la mesure où elles ne sont pas incompatibles ou exclusives les unes des autres.Of course, the different features, variants and embodiments of the lighting device according to the invention can be associated with each other in various combinations to the extent that they are not incompatible or exclusive of each other.

Par ailleurs, diverses autres caractéristiques de l'invention ressortent de la description annexée effectuée en référence aux dessins qui illustrent des formes non limitatives de réalisation d'un dispositif d'éclairage selon l'invention.

  • La figure 1 est une perspective schématique en vue partiellement éclatée d'un dispositif d'éclairage selon l'invention.
  • La figure 2 est une coupe transversale du dispositif d'éclairage assemblé illustré à la figure 1.
  • La figure 3 est une coupe transversale du capot formant au moins la lentille linéaire du dispositif d'éclairage illustré aux figures 1 et 2.
  • La figure 4 est une coupe transversale schématique, analogue à la figure 2, montrant une autre forme de réalisation du dispositif d'éclairage selon l'invention.
Il est à noter que sur ces figures les éléments structurels et/ou fonctionnels communs aux différentes variantes peuvent présenter les mêmes références.Furthermore, various other features of the invention appear from the attached description with reference to the drawings which illustrate non-limiting embodiments of a lighting device according to the invention.
  • The figure 1 is a schematic perspective view partially exploded of a lighting device according to the invention.
  • The figure 2 is a cross-section of the assembled lighting device shown in FIG. figure 1 .
  • The figure 3 is a cross-section of the cover forming at least the linear lens of the illumination device illustrated in FIGS. Figures 1 and 2 .
  • The figure 4 is a schematic cross section similar to the figure 2 , showing another embodiment of the lighting device according to the invention.
It should be noted that in these figures the structural and / or functional elements common to the different variants may have the same references.

Un dispositif d'éclairage selon l'invention, désigné dans son ensemble par la référence 1 aux figures 1 et 2, peut être qualifié de dispositif d'éclairage linéaire dans la mesure où il présente une source linéaire d'éclairage E comprenant une ou plusieurs rangées R de diodes électroluminescentes ponctuelles et/ou filaires. Un dispositif d'éclairage linéaire selon l'invention présente généralement une longueur très nettement supérieure à la largeur du dispositif d'éclairage sans que l'invention exclue une forme de réalisation du dispositif d'éclairage dans laquelle il présente une largeur très proche de sa longueur par la mise en oeuvre d'une quantité suffisante de rang de diodes électroluminescentes. Le qualificatif linéaire n'en reste pas moins pertinent dans la mesure où il se rapporte à la direction d'alignement des rangées de diodes électroluminescentes.A lighting device according to the invention, designated as a whole by reference 1 to Figures 1 and 2 , may be qualified linear lighting device insofar as it has a linear light source E comprising one or more rows R of light emitting diodes and / or wired. A linear lighting device according to the invention generally has a length very much greater than the width of the lighting device without the invention excluding an embodiment of the lighting device in which it has a width very close to its width. length by the implementation of a sufficient amount of row of light emitting diodes. The linear qualifier is nonetheless relevant insofar as it relates to the alignment direction of the rows of light-emitting diodes.

Le dispositif d'éclairage linéaire 1 comprend un corps allongé 2 qui s'étend selon un axe longitudinal L. Le corps allongé 2 définit au moins une surface 3 de réception d'au moins un substrat 4 portant au moins une rangée R de diodes électroluminescentes 5 alignées selon l'axe longitudinal L. Selon l'exemple illustré, le corps allongé 2 comprend une unique surface de réception 3 qui est sensiblement centrée par rapport au corps allongé 2 et sur laquelle est adapté un unique substrat 4 portant une seule rangée R de diodes 5. Le substrat 4 peut, par exemple, comprendre une carte de circuit imprimé, en abrégé PCB pour en anglais "printed circuit board", sur laquelle les diodes électroluminescentes 5 sont soudées. Bien entendu, le substrat 4 peut être réalisé de toute autre manière appropriée pour assurer la tenue mécanique des diodes électroluminescentes 5 ainsi que leur alimentation électrique.The linear lighting device 1 comprises an elongate body 2 which extends along a longitudinal axis L. The elongated body 2 defines at least one receiving surface 3 of at least one substrate 4 carrying at least one row R of light-emitting diodes 5 according to the illustrated example, the elongate body 2 comprises a single receiving surface 3 which is substantially centered with respect to the elongate body 2 and on which is fitted a single substrate 4 carrying a single row R The substrate 4 may, for example, comprise a printed circuit board, in which the light-emitting diodes 5 are soldered. Of course, the substrate 4 may be made in any other suitable manner to ensure the mechanical strength of the light emitting diodes 5 and their power supply.

Selon l'exemple illustré, chaque diode électroluminescente 5 est associée, comme cela ressort plus particulièrement de la figure 2, à une lentille primaire 6 qui possède une face d'émission 7 convexe étant entendu que la face d'émission 7 pourrait également être plane. De plus, dans le cas présent chaque diode électroluminescente 5 est dépourvue de lentille secondaire individuelle. Il doit être noté, selon l'invention les diodes 5 ne comprennent pas nécessairement de lentille primaire.According to the illustrated example, each light-emitting diode 5 is associated, as is more particularly apparent from the figure 2 to a primary lens 6 which has a convex transmitting face 7, it being understood that the transmitting face 7 could also to be flat. In addition, in this case each light emitting diode 5 is devoid of individual secondary lens. It should be noted that according to the invention the diodes 5 do not necessarily include a primary lens.

Selon l'exemple illustré, le corps allongé 2 comprend deux réflecteurs plans 10 situés de part et d'autre de la face de réception 3. Les deux réflecteurs plans 10 s'étendent parallèlement à l'axe longitudinal L et forment, l'un avec l'autre et selon l'exemple illustré, un angle plat ou de 180°.According to the illustrated example, the elongate body 2 comprises two planar reflectors 10 located on either side of the receiving face 3. The two planar reflectors 10 extend parallel to the longitudinal axis L and form one with the other and according to the example shown, a flat angle or 180 °.

Le corps allongé 2 délimite avec la surface de réception 3 et les réflecteurs plans 10 une chambre d'éclairage 11 dans laquelle la rangée de diodes électroluminescentes R, constitutive de la source linéaire E, est destinée à se retrouver en partie au moins enfermée.The elongated body 2 defines with the receiving surface 3 and the planar reflectors 10 a lighting chamber 11 in which the array of light-emitting diodes R, constituting the linear source E, is intended to be partly at least enclosed.

Le dispositif d'éclairage selon l'invention comprend également un capot linéaire allongé 20 qui ferme en partie au moins la chambre d'éclairage 11. Selon l'invention, le capot 20 est également destiné à laisser passer ou diffuser la lumière émise par chaque source linéaire E. À cet effet, le capot 20 est réalisé dans un matériau au moins translucide et de préférence transparent tel que par exemple une matière plastique comme du polyméthacrylate de méthyle (PMMA), du polytéréphtalate d'éthylène (PET) ou encore du polypropylène (PP) sans que cette liste ne soit ni limitative ni exhaustive.The lighting device according to the invention also comprises an elongated linear hood 20 which at least partly closes the lighting chamber 11. According to the invention, the hood 20 is also intended to let in or diffuse the light emitted by each linear source E. For this purpose, the cover 20 is made of an at least translucent and preferably transparent material such as for example a plastic material such as polymethyl methacrylate (PMMA), polyethylene terephthalate (PET) or polypropylene (PP) without this list being neither exhaustive nor exhaustive.

Le capot 20 est également adapté pour assurer un conditionnement de la lumière émise par la source linéaire E de manière à la diriger et la concentrer, dans le cas présent, selon un lobe ou secteur d'éclairage symétrique par rapport à un plan sagittal S. À cet effet, le capot 20 forme, en relation avec chaque source linaire de lumière E, une lentille linéaire 21 parallèle à l'axe longitudinal L du corps 2. Selon l'exemple illustré figures 1 et 2, le capot 2 comprend une seule lentille linéaire 21.The cover 20 is also adapted to ensure a conditioning of the light emitted by the linear source E so as to direct and concentrate it, in this case, according to a lobe or lighting sector symmetrical with respect to a sagittal plane S. For this purpose, the cover 20 forms, in relation to each linear light source E, a linear lens 21 parallel to the longitudinal axis L of the body 2. According to the illustrated example Figures 1 and 2 , the cover 2 comprises a single linear lens 21.

Selon l'invention, chaque lentille linéaire 21 comprend une face externe 22 d'émission de la lumière qui est, selon l'exemple illustré, symétrique par rapport au plan sagittal S sensiblement parallèle à l'axe longitudinal L. Lorsque le capot 20 est adapté sur le corps 2, le plan sagittal S forme un plan de symétrie de la chambre d'éclairage 11, les réflecteurs 10 étant alors l'image l'un de l'autre par rapport au plan sagittal S.According to the invention, each linear lens 21 comprises an external light emitting face 22 which is, according to the illustrated example, symmetrical with respect to the sagittal plane S substantially parallel to the longitudinal axis L. When the hood 20 is adapted to the body 2, the sagittal plane S forms a plane of symmetry of the illumination chamber 11, the reflectors 10 then being the image of one another with respect to the sagittal plane S.

La lentille linéaire 21 possède également une face interne 23 de réception de la lumière des diodes électroluminescentes 5 située à l'opposé de la face externe 22 d'émission de la lumière des diodes électroluminescentes 5. La lentille linéaire 21 assure dans son ensemble une transmission de la lumière émise par lesdites diodes électroluminescentes 5. Dans le cadre de l'invention, la face externe 22 d'émission de la lumière pourrait également être désignée simplement en tant que face avant ou face externe du capot tandis que la face de réception 23 pourrait être qualifiée simplement de face arrière ou face interne.The linear lens 21 also has an inner face 23 for receiving the light of the light-emitting diodes 5 located opposite the external light-emitting face 22 of the light-emitting diodes 5. The linear lens 21 as a whole provides a transmission light emitted by said diodes 5. In the context of the invention, the outer face 22 of light emission could also be designated simply as the front face or outer face of the hood while the receiving face 23 could be described simply as rear face or internal face.

Comme cela ressort de la figure 3, la face externe 22 possède, en section droite transversale, une partie centrale 24 de forme générale convexe et protubérante, de préférence lisse, bordée par deux parties latérales planes 25 également de préférence lisses. Les plans des parties latérales planes 25 forment un angle obtus. Selon l'exemple illustré, les parties planes 25 forment un angle plat.As is apparent from the figure 3 , the outer face 22 has, in cross section, a central portion 24 of generally convex and protuberant, preferably smooth, bordered by two flat lateral portions 25, preferably smooth. The planes of the flat lateral portions 25 form an obtuse angle. According to the illustrated example, the planar portions 25 form a flat angle.

La face de réception 23 est, quant à elle, conformée de manière à comprendre une région centrale 30 en partie au moins concave située en regard de la région centrale protubérante 24 de la face externe 22 pour former, selon l'exemple illustré, un système optique assurant une concentration d'une partie lumière émise par les diodes dans un secteur angulaire symétrique par rapport au plan sagittal S d'une valeur comprise entre 20° et 120°. Les parties centrales des faces de réception et d'émission définissent ensemble la lentille linéaire 21. La face de réception 23 comprend également deux parties latérales planes 31 sensiblement parallèles aux parties latérales planes 25 de la face d'émission 23 pour former deux ailes latérales 32 de diffusion de la lumière. Les ailes latérales 32 forment deux guides de lumière qui possèdent une épaisseur e comprise entre 1 mm et 10 mm.The receiving face 23 is, for its part, shaped so as to comprise a central region 30 at least partially concave located facing the protruding central region 24 of the outer face 22 to form, according to the illustrated example, a system optical providing a concentration of a light portion emitted by the diodes in an angular sector symmetrical with respect to the sagittal plane S of a value between 20 ° and 120 °. The central parts of the receiving and transmitting faces together define the linear lens 21. The receiving face 23 also comprises two flat lateral portions 31 substantially parallel to the flat lateral parts 25 of the emission face 23 to form two lateral wings 32 of light scattering. The lateral wings 32 form two light guides which have a thickness e of between 1 mm and 10 mm.

Selon l'exemple illustré, les ailes se prolongent à l'opposé de la partie ou région centrale 21 par un segment latéral 33 formant un angle obtus, de préférence supérieur ou égal à 130°, avec l'aile correspondante de sorte que les segments 33 convergent vers la face de réception 23 de la lentille linéaire.According to the illustrated example, the wings extend away from the central portion or region 21 by a lateral segment 33 forming an obtuse angle, preferably greater than or equal to 130 °, with the corresponding wing so that the segments 33 converge towards the receiving face 23 of the linear lens.

Afin de bien réfléchir la lumière en direction des faces 25 les faces latérales planes 31 de la face de réception 23 peuvent être associées à des réflecteurs, recevoir un revêtement réfléchissant ou encore comprendre une texturation ou des micro-primes ou micro-conformation induisant une réflexion de la lumière. Il en est de même pour les faces internes des segments latéraux 33.In order to reflect the light in the direction of the faces 25, the flat lateral faces 31 of the reception face 23 may be associated with reflectors, receive a reflective coating or may comprise texturing or micro-primes or micro-conformation inducing reflection. light. It is the same for the internal faces of the lateral segments 33.

La région centrale 30 de la face de réception définit une cavité 50 de réception des diodes formant la source lumineuse. De plus, chaque bord de la région centrale 30 forme avec la partie plane 31 correspondante un angle, mesuré à l'intérieur de la lentille linéaire, supérieur ou égal à 100° et de préférence supérieur à 110°. Dans le cas présent, la région centrale concave 30 de la face de réception 23 présente une profondeur inférieure à l'épaisseur des ailes et un rayon de courbure supérieur ou égal à deux fois l'épaisseur des ailes latérales. De plus, la largeur L' de la région concave de la face de réception, mesurée au niveau du raccordement avec les parties latérales planes 31, est inférieure ou égale, de préférence strictement inférieure, à la largeur L" de la partie convexe protubérante 24 de la face d'émission mesurée au niveau du raccordement avec les parties latérales planes 25.The central region 30 of the receiving face defines a cavity 50 for receiving the diodes forming the light source. In addition, each edge of the central region 30 forms with the corresponding flat part 31 an angle, measured inside the linear lens, greater than or equal to 100 ° and preferably greater than 110 °. In the present case, the concave central region 30 of the receiving face 23 has a depth less than the thickness of the wings and a radius of curvature greater than or equal to twice the thickness of the lateral wings. In addition, the width L 'of the concave region of the receiving face, measured at the connection with the flat lateral portions 31, is less than or equal to, preferably less than, the width L "of the protruding convex portion 24 of the emission face measured at the connection with the plane lateral parts 25.

Par ailleurs, chaque bord de la partie centrale protubérante 24 forme avec la partie plane correspondante un angle, mesuré à l'extérieur de la lentille linéaire, inférieur ou égal à 95°. De plus, dans le cas présent, la partie centrale protubérante 24 de la face d'émission 22 présente une hauteur H mesurée à partir des parties latérales planes de la face d'émission supérieure à 4 fois l'épaisseur e des ailes latérales 32. Toujours, selon l'exemple illustré, la région centrale protubérante 24 de la face d'émission présente, en section droite transversale, une forme générale elliptique avec un grand axe A sensiblement orthogonal aux parties latérales planes 25. La largeur L" de la partie protubérante est alors inférieure à la longueur du petit axe a. Il doit être noté que l'ellipse formant la partie centrale protubérante est tronquée au niveau au niveau de son raccordement avec les ailes.Furthermore, each edge of the protruding central portion 24 forms with the corresponding flat part an angle, measured outside the linear lens, less than or equal to 95 °. Moreover, in the present case, the protruding central portion 24 of the emission face 22 has a height H measured from the flat lateral parts of the emission face greater than 4 times the thickness e of the lateral wings 32. Still, according to the illustrated example, the protruding central region 24 of the emission face has, in cross section, an elliptical general shape with a major axis A substantially orthogonal to the flat lateral portions 25. The width L "of the part protuberant is then smaller than the length of the minor axis A. It should be noted that the ellipse forming the protruding central portion is truncated at the level of its connection with the wings.

Un dispositif d'éclairage linéaire, selon l'invention et tel qu'ainsi réalisé, permet de rediriger une grande partie de la lumière émise par les diodes dans une direction privilégiée parallèle au plan sagittal S selon un secteur angulaire compris entre 20° et 120°.A linear lighting device, according to the invention and as thus produced, makes it possible to redirect a large part of the light emitted by the diodes in a preferred direction parallel to the sagittal plane S in an angular sector of between 20 ° and 120 °. °.

Le dispositif d'éclairage décrit précédemment en relation avec les figures 1 à 3, comprend une source linéaire de lumière E formée d'une seule rangée R de diodes électroluminescentes. Toutefois, selon l'invention, la source linéaire de lumière E pourrait comprendre plusieurs rangées de diodes électroluminescentes ponctuelles ou filaires R juxtaposées.The lighting device described above in connection with the Figures 1 to 3 , comprises a linear light source E formed of a single row R of light-emitting diodes. However, according to the invention, the linear light source E could comprise several rows of juxtaposed point or wire electrodes R.

Bien entendu, différentes autres variantes du dispositif d'éclairage selon l'invention peuvent être envisagées dans le cadre des revendications annexées.Of course, various other variants of the lighting device according to the invention can be envisaged within the scope of the appended claims.

Ainsi, la figure 4 illustre une variante du dispositif d'éclairage, conforme à l'invention, qui diffère de celle décrite en relation avec les figures 1 à 3 en ce que la région centrale protubérante de la face d'émission comprend, en section droite transversale, deux parties circulaires 40 se raccordant au niveau d'un sillon central concave 41 de profondeur inférieure et de préférence très inférieure à la hauteur de la région centrale 24 de sorte que la forme générale de la région centrale protubérante peut toujours être qualifiée de convexe. Dans le cas présent, le rayon de courbure de chaque partie circulaire 40 est compris entre 2 fois et 6 fois l'épaisseur e des ailes latérales 32.So, the figure 4 illustrates a variant of the lighting device, according to the invention, which differs from that described in relation to the Figures 1 to 3 in that the protruding central region of the emission face comprises, in transverse cross-section, two circular portions 40 connected at a central groove concave 41 of lower depth and preferably much lower than the height of the central region 24 so that the general shape of the protruding central region can always be described as convex. In this case, the radius of curvature of each circular portion 40 is between 2 times and 6 times the thickness e of the lateral wings 32.

Une telle conformation de la lentille linéaire permet de diriger la lumière issue des diodes électroluminescentes selon deux lobes principaux ou secteurs d'éclairage disposés de façon symétrique par rapport au plan sagittal S.Such a conformation of the linear lens makes it possible to direct the light issuing from the light-emitting diodes according to two main lobes or illumination sectors arranged symmetrically with respect to the sagittal plane S.

Par ailleurs, il doit être compris que selon l'invention plusieurs dispositifs d'éclairage linéaire peuvent être associés selon diverses combinaisons pour former un luminaire.Furthermore, it should be understood that according to the invention several linear lighting devices can be associated in various combinations to form a luminaire.

Claims (12)

Dispositif d'éclairage linéaire à diodes électroluminescentes comprenant au moins : - un corps (2) allongé comprenant au moins une surface de réception (3) d'au moins un substrat (4) portant une source linéaire (E) de lumière comprenant au moins une rangée (R) de diodes électroluminescentes (5) alignées selon un axe longitudinal (L) du corps et délimitant, en partie au moins, au moins une chambre d'éclairage (11) linéaire allongée dans laquelle les diodes (5) sont situées, - un capot linéaire allongé (20) fermant la chambre d'éclairage (11), caractérisé en ce que le capot (20) forme, en relation avec la source linéaire, une lentille linéaire (21), au moins translucide, d'axe longitudinal parallèle à l'axe longitudinal (L) du corps (2), avec une face externe d'émission (22) de la lumière et une face interne de réception (23) de la lumière des diodes (5), dont - la face d'émission (22), vue en section droite transversale, possède une partie centrale (24) de forme générale convexe et protubérante bordée par deux parties latérales planes, chaque bord de la partie centrale formant avec la partie plane correspondante un angle, mesuré à l'extérieur de la lentille linéaire, inférieur ou égal à 95°, et - la face de réception (23), vue en section droite transversale, comprend : - une région centrale (30) en partie au moins concave située en regard de la région centrale de la face d'émission pour former une cavité d'accueil des diodes, - deux parties latérales planes sensiblement parallèles aux parties latérales planes de la face d'émission pour former deux ailes (32) latérales de diffusion de la lumière qui bordent la lentille linéaire (21), chaque bord de la région centrale formant avec la partie plane correspondante un angle, mesuré à l'intérieur de la lentille linéaire, supérieur ou égal à 100° et de préférence supérieur à 110°. Linear light-emitting diode lighting device comprising at least: an elongate body (2) comprising at least one receiving surface (3) of at least one substrate (4) carrying a linear light source (E) comprising at least one row (R) of aligned light-emitting diodes (5) along a longitudinal axis (L) of the body and delimiting, at least in part, at least one elongate linear lighting chamber (11) in which the diodes (5) are located, an elongated linear hood (20) closing the lighting chamber (11), characterized in that the cover (20) forms, in relation to the linear source, a linear lens (21), at least translucent, having a longitudinal axis parallel to the longitudinal axis (L) of the body (2), with a external emission face (22) of the light and an internal receiving face (23) of the light of the diodes (5), of which - The transmitting face (22), seen in transverse cross section, has a central portion (24) of generally convex and protruding form bordered by two flat lateral parts, each edge of the central part forming with the corresponding flat part an angle , measured outside the linear lens, less than or equal to 95 °, and the reception face (23), seen in cross section, comprises: a central region (30) partially at least concave located facing the central region of the emission face to form a cavity for receiving the diodes, two flat lateral parts substantially parallel to the flat lateral parts of the emission face to form two lateral light diffusion wings (32) bordering the linear lens (21), each edge of the central region forming with the flat part corresponding angle, measured inside the linear lens, greater than or equal to 100 ° and preferably greater than 110 °. Dispositif d'éclairage linéaire selon la revendication précédente, caractérisé en ce que les plans des parties latérales planes (25, 31) du capot forment un angle plat.Linear lighting device according to the preceding claim, characterized in that the planes of the flat lateral parts (25, 31) of the cover form a flat angle. Dispositif d'éclairage linéaire selon l'une des revendications précédentes, caractérisé en ce que, la face externe ou d'émission (22) du capot est symétrique par rapport à un plan sagittal (S).Linear lighting device according to one of the preceding claims, characterized in that the outer or emission face (22) of the cover is symmetrical with respect to a sagittal plane (S). Dispositif d'éclairage linéaire selon l'une des revendications précédentes, caractérisé en ce que les ailes (32) possèdent une épaisseur comprise entre 1 mm et 10 mm.Linear lighting device according to one of the preceding claims, characterized in that the wings (32) have a thickness of between 1 mm and 10 mm. Dispositif d'éclairage linéaire selon l'une des revendications précédentes, caractérisé en ce que la région centrale concave (30) de la face de réception (23) présente une profondeur inférieure à l'épaisseur (e) des ailes (32).Linear lighting device according to one of the preceding claims, characterized in that the concave central region (30) of the receiving face (23) has a depth less than the thickness (e) of the wings (32). Dispositif d'éclairage selon l'une des revendications précédentes caractérisé en ce que les ailes se prolongent à l'opposé de la partie ou région centrale par un segment latéral formant un angle obtus, de préférence supérieur ou égal à 130°, avec l'aile correspondante de sorte que les segments (33) convergent vers la face de réception de la lentille linéaire (21).Lighting device according to one of the preceding claims characterized in that the wings extend away from the central part or region by a lateral segment forming an obtuse angle, preferably greater than or equal to 130 °, with the corresponding wing so that the segments (33) converge towards the receiving face of the linear lens (21). Dispositif d'éclairage selon l'une des revendications précédentes, caractérisé en ce que la largeur (L') de la région concave (30) de la face de réception, mesurée au niveau du raccordement avec les parties latérales planes, est inférieure ou égale, de préférence strictement inférieure, à la largeur (L") de la partie convexe (24) de la face d'émission mesurée au niveau du raccordement avec les parties latérales planes.Lighting device according to one of the preceding claims, characterized in that the width (L ') of the concave region (30) of the receiving face, measured at the connection with the flat lateral parts, is less than or equal to , preferably strictly less than the width (L ") of the convex portion (24) of the emission face measured at the connection with the flat side portions. Dispositif d'éclairage selon l'une des revendications précédentes, caractérisé en ce que la partie centrale protubérante (24) de la face d'émission (22) présente une hauteur (H) mesurée à partir des parties latérales planes de la face d'émission supérieure à 4 fois l'épaisseur (e) des ailes latérales (32).Lighting device according to one of the preceding claims, characterized in that the protruding central portion (24) of the emission face (22) has a height (H) measured from the flat lateral parts of the face of emission greater than 4 times the thickness (e) of the lateral wings (32). Dispositif d'éclairage selon l'une des revendications précédentes, caractérisé en ce que la région centrale (30) concave de la face de réception présente un rayon de courbure supérieur ou égal à deux fois l'épaisseur (e) des ailes latérales.Lighting device according to one of the preceding claims, characterized in that the concave central region (30) of the receiving face has a radius of curvature greater than or equal to twice the thickness (e) of the lateral wings. Dispositif d'éclairage selon l'une des revendications précédentes, caractérisé en ce que la région centrale protubérante (24) de la face d'émission présente, en section droite transversale, une forme générale elliptique avec un grand axe (A) sensiblement orthogonal aux parties latérales planes.Lighting device according to one of the preceding claims, characterized in that the protruding central region (24) of the emission face has, in cross section, an elliptical general shape with a major axis (A) substantially orthogonal to the flat side parts. Dispositif d'éclairage selon l'une des revendications 1 à 8, caractérisé en ce que la région centrale protubérante de la face d'émission comprend, en section droite transversale, deux parties circulaires (40) se raccordant au niveau d'un sillon central concave (41) de profondeur inférieure à l'épaisseur (e) de la région centrale.Lighting device according to one of claims 1 to 8, characterized in that the protruding central region of the emission face comprises, in cross section, two circular parts (40) connected at a central groove concave (41) of depth less than the thickness (e) of the central region. Dispositif d'éclairage selon la revendication 10, caractérisé en ce que le rayon de courbure de chaque partie circulaire est compris entre 2 fois et 6 fois l'épaisseur (e) des ailes latérales.Lighting device according to claim 10, characterized in that the radius of curvature of each circular portion is between 2 times and 6 times the thickness (e) of the lateral wings.
EP17305287.9A 2016-03-19 2017-03-16 Linear lighting device with linear lens and side flanges for light diffusion Active EP3220044B1 (en)

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FR1652363A FR3049042B1 (en) 2016-03-19 2016-03-19 LINEAR LIGHTING DEVICE WITH LINEAR LENS AND SIDE LAMPS FOR LIGHT DIFFUSION

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US11796141B2 (en) * 2019-09-17 2023-10-24 Signify Holding B.V. Lighting device comprising an LED strip

Citations (3)

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Publication number Priority date Publication date Assignee Title
US20060164833A1 (en) * 2005-01-26 2006-07-27 Pelka & Associates Cylindrical irradiance-mapping lens and its applications to LED shelf-lighting
US20100128474A1 (en) * 2008-11-25 2010-05-27 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led lamp
US20120281416A1 (en) * 2011-05-05 2012-11-08 Everlight Electronics Co., Ltd. Optical Lenses and Lamps Containing Said Optical Lenses

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060164833A1 (en) * 2005-01-26 2006-07-27 Pelka & Associates Cylindrical irradiance-mapping lens and its applications to LED shelf-lighting
US20100128474A1 (en) * 2008-11-25 2010-05-27 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led lamp
US20120281416A1 (en) * 2011-05-05 2012-11-08 Everlight Electronics Co., Ltd. Optical Lenses and Lamps Containing Said Optical Lenses

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