EP2769145A1 - Illuminating device comprising light-emitting diodes - Google Patents

Illuminating device comprising light-emitting diodes

Info

Publication number
EP2769145A1
EP2769145A1 EP12790597.4A EP12790597A EP2769145A1 EP 2769145 A1 EP2769145 A1 EP 2769145A1 EP 12790597 A EP12790597 A EP 12790597A EP 2769145 A1 EP2769145 A1 EP 2769145A1
Authority
EP
European Patent Office
Prior art keywords
face
radiator
plate
base body
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP12790597.4A
Other languages
German (de)
French (fr)
Other versions
EP2769145B1 (en
Inventor
Philippe SHAKESHAFT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
COOLIGHT TECHNOLOGY FRANCE
Original Assignee
EPLED France
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EPLED France filed Critical EPLED France
Publication of EP2769145A1 publication Critical patent/EP2769145A1/en
Application granted granted Critical
Publication of EP2769145B1 publication Critical patent/EP2769145B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/69—Details of refractors forming part of the light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/007—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing
    • F21V23/009—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array enclosed in a casing the casing being inside the housing of the lighting device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • F21V23/023—Power supplies in a casing
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
    • F21V29/713—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements in direct thermal and mechanical contact of each other to form a single system
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/75—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with fins or blades having different shapes, thicknesses or spacing
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
    • F21V29/773—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional 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 invention relates to a lighting device with light emitting diodes equipped with a heat sink, and will find a particular application as a lighting head for street lamp.
  • the field of the invention is that of public lighting devices, such as street lights or the like.
  • lighting heads comprising a lampshade, equipped with light-emitting diode arrays and a heat sink for evacuating the heat generated by said diodes.
  • document EP2189 709A1 discloses a lighting device with light-emitting diodes, more particularly a lamp post, comprising a heat sink.
  • This shade comprises an upper plate and a lower plate shaped and assembled together so as to form a hollow body internally receiving light emitting diode rails.
  • the sheets are provided with perforations so as to form a blind, breathable, constituting a heat sink.
  • This lampshade makes it possible to create, by convention phenomena, a flow of air ensuring the cooling of the light-emitting diodes.
  • the object of the present invention is to provide a lighting device with light emitting diodes equipped with a heat sink, and whose cooling performance is improved.
  • Another object of the present invention is to provide such a lighting device integrating the electronic part necessary for power supply, see the driving of the light emitting diodes.
  • Another object of the present invention is to propose such a lighting device of simplified design, minimizing the number of parts required for its manufacturing.
  • Another object of the present invention is to provide such a lighting device requiring little maintenance.
  • the invention relates to a light-emitting diode lighting device equipped with a heat dissipator comprising a radiator.
  • the heat dissipator comprises:
  • a base body one of the faces of the base body, said lighting face supporting said light-emitting diodes, said lighting face being intended to be directed downwards, the other face of the base body, so-called heat transfer face being in contact with the radiator,
  • the radiator constituted by a monobloc element comprising:
  • fins extending around said plate, said fins being oriented substantially perpendicular to said plate, so as to allow the cooling of the light-emitting diodes by natural convection.
  • the base body has a chamfer on its circumference between said transmission face and the edge of the basic body
  • the face of the radiator plate in contact with said heat-transmitting face has a cavity of complementary shape to that of the base body, with a flat surface in contact with the heat-transmitting face and a bevelled part in contact with the chamfer.
  • said face of the radiator plate in contact with the heat transmission face is called the lower face, walls of said one-piece element projecting from the other side of the plate, said upper face, said walls being oriented substantially perpendicular to said plate, said fins being secured by their inner edge of said walls;
  • the device has a feed group, said walls of said monobloc member forming a housing, in particular of rectangular shape, inside which is received the feed group;
  • the power pack is received in a housing positioned in said housing so as to create a blade of air between the interior of the housing and the housing of the power pack, said plate of said radiator having vents orifices in such a way as to allow the circulation of said air gap by natural convection;
  • said radiator is said first radiator
  • the power unit comprising a second radiator, distinct from said first radiator, said second radiator being constituted by a monobloc element provided with fins, in particular provided in the extension of the fins of said first radiator;
  • the device has an optical arranged in line with said light emitting diodes and wherein the face of the dissipator plate in contact with the heat transmission face has a shoulder dimensioned for the reception of the optics;
  • the optics is maintained in shoulder by means of a removable ring, an eyelash seal allowing the flow of rain water on the surface of the optics;
  • the lighting face of the base body supporting said light-emitting diodes comprises a middle part and, on either side, two projecting lateral parts, said middle part supporting blue-light-emitting diodes embedded in a phosphorized gel, the gel being received in the cavity formed between said two lateral parts, the lateral parts receiving other light-emitting diodes;
  • the base body is in a copper-based metal and said monoblock element of the aluminum dissipator, a silver-based coating, of thickness less than 100 microns, facilitating the transfer of heat between the base body and said monobloc element;
  • the invention also relates to a lamp post equipped with a lighting device according to the invention, said lighting face being directed downwards.
  • FIG. 1 is a perspective view of a lighting device according to the invention according to one embodiment.
  • FIG. 2 is a sectional view of the device as illustrated in FIG.
  • Figure 3 is an exploded view of the device as shown in Figure 1.
  • FIG. 4 is a sectional view of the device as illustrated in FIG.
  • FIG. 5 is a detailed view of the diode matrix supported by the base body.
  • FIG. 6 is a sectional view of the matrix as illustrated in FIG. 5;
  • FIG. 7 is a view illustrating the particular relief of the illumination face of the base body.
  • FIG. 8 is a perspective view from above of a lighting device, according to a second embodiment of the invention, of rectangular shape
  • FIG. 9 is a view from below of the device of FIG. 8.
  • the invention relates to a lighting device 1 with light-emitting diodes 2 equipped with a heat dissipator comprising a heat sink 3 and whose function is to ensure the cooling of said light-emitting diodes 2.
  • said heat dissipator comprises:
  • a base body 4 one of the faces of the base body 4, said lighting face 6 supporting said light-emitting diodes 2, said lighting face 6 being intended to be directed downwards, the other face of the base body 4, said face 7 of heat transmission being in contact with the radiator 3,
  • said radiator 3 constituted by a monoblock element 30 comprising:
  • the base body 4 is in a copper-based metal and said monobloc element 30 of the aluminum radiator 3.
  • a coating based on silver of thickness less than 100 microns, especially between 10 and 70 microns (ie 30 microns) may be provided between the radiator 3 and the base body to facilitate heat transfer between these two elements.
  • the light-emitting diodes may be secured (ie soldered) to the illumination face 6 of the disc 5 by means of a silver-based coating, less than 100 microns thick, in particular between 10 and 70 microns (ie 30 microns).
  • the heat generated by the light-emitting diodes is transmitted to the base body 4, then to the radiator 3.
  • the heating of the radiator 3 creates a temperature gradient promoting the air circulation between the fins 32, by natural convection.
  • the basic body 4 takes the general shape of a disc 5.
  • the base body 4 such as for example a thin body of square shape, in star or other ...
  • the fins 32 are, according to the examples illustrated in the figures, directed along their length strictly perpendicular to the plane of the plate 31.
  • These fins may however not be strictly perpendicular to the plane of the plate 31, but have a slight inclination with the perpendicular, and in particular an inclination relative to the perpendicular between 0 ° and 15 °.
  • the fins 32 are angularly distributed regularly around the axis ⁇ of the disk 5, directed in radial directions.
  • FIGS. 4 and 6 illustrate more particularly in FIGS. 4 and 6:
  • the base body 4 (in particular the disk 5) has a chamfer 50 on its circumference between said heat transfer face 7 and the edge of the base body 4,
  • the face of the plate 31 of the radiator 3 in contact with the heat transfer face 7 has a cavity 33 of complementary shape to that of the base body 4, in particular the disc 5, with a flat surface 34 in contact with the face 7 and a beveled portion 35 in contact with the surface of the bevel 50.
  • this beveled portion 35 is frustoconical. In the case of a square base body, this beveled portion would affect a truncated pyramid shape.
  • Such an assembly makes it possible in particular to increase the exchange surfaces between the base body 4 and the radiator 3, and generally to improve the performance of the heat sink.
  • the inventor has found good cooling performance when the length of the fins 32 in said direction substantially perpendicular to the plate 31 is greater than one-third of the smallest dimension of the base body 4, in a direction parallel to said plate 31 .
  • the monobloc element 30 of the radiator 3 constitutes an air-permeable shade.
  • said face of the radiator plate 3 in contact with the heat transfer face 7 is said lower face, walls 36 of said one-piece element 30 extending from the other face of the plate 31, so-called upper face, said walls 36 being oriented perpendicular to the plane of said plate 31, said fins 32 being integral by their inner edge of said walls 36.
  • the lighting device comprises a power supply unit 8 comprising the electronics necessary for powering or even driving the diodes.
  • said walls 36 of said one-piece element 30 form a housing 9, in particular of rectangular shape (seen from above); inside which feed group 8 is received.
  • the feed group 8 is received in a housing 80, complementary in shape to the housing, positioned in said housing 9 so as to create an air gap 10 between the interior of the housing 9 and the housing 80 of the housing.
  • feed group 8 and more particularly an air gap between the underside of the housing 80 and the upper face of the plate 31, and an air gap between each of the four side walls of the housing 80 and the wall 36 corresponding forming the housing 9.
  • said plate 31 of said radiator 3 has vent holes 37 so as to allow the circulation of said air knife by natural convection.
  • This circulation of the air space illustrated by the arrows in FIG. 4, ensures the cooling of the supply unit, but also that of the radiator 3.
  • said radiator is said first radiator 3, the power unit 8 comprising a second radiator 11, separate from said first radiator 3, said second radiator 11 being constituted by a monobloc element 110 provided with 111.
  • the function of second radiator is to ensure the cooling of the feed group 8; and in particular of its constituent electronic components.
  • the monobloc element 110 of the radiator 11 also accumulates a cover function to close the upper opening of the housing 80 of said power supply unit 8.
  • a seal 81 makes it possible to seal between the housing 80 and this cover.
  • the fins 111 of the second radiator 11 may be provided in the extension of the fins 32 of said first radiator 3.
  • the one-piece element 110 may be made of aluminum and, in particular is obtained by molding.
  • the one-piece body 110 has a housing, receiving a connection device 22 between a power supply cable 21 and the power supply unit 8, and capable of providing a class II protection according to FIG. standard NF C 15-100.
  • This connection device 22 comprises a housing 23 in an electrically insulating material (ie plastic) whose upper opening is closed by a cover 24, sealingly via a gasket 25.
  • the bare parts of the electric cables are connected in the internal volume of the housing 23, through an electrical connector.
  • the lighting device has an optic 12 arranged in line with said light-emitting diodes 2.
  • the light-emitting diodes 2 are concentrated on the illumination face of the base body so that the end user only distinguishes one light source, and not a plurality of light spots.
  • the surface density of the diodes can be from 12 to 20 light-emitting diodes per cm.
  • the average diameter of this optic 12 is greater than four times the average diameter of the emission surface of said illumination face 6 of the base body.
  • emission surface of the illumination face 6 is meant the smallest area carrying all the light-emitting diodes 2 of the base body 4.
  • the average diameter of the emission surface is about 28 mm and the average diameter of the optics is 127 mm.
  • the face of the plate 31 of the radiator 3 in contact with the heat transmission face may have a shoulder 13, in particular circular, sized for the reception of the optical 12, circular shape corresponding to the interlocking game near.
  • the circular shape advantageously makes it possible to adjust the orientation of the optics and thus the illumination when the optics 12 is asymmetrical optics.
  • the optic 12 is held in the shoulder 13 by means of a ring 14, removable, and a typical system, cooperating with said monobloc element 30.
  • the system is thus scalable and interchangeable.
  • an eyelash seal 15 allows the flow of rainwater on the surface of the optics 12 to ensure self-cleaning of the optics 12.
  • This eyelash seal 15 is made of an elastomeric material by a integral element having a circular portion 150 intended to be clamped between the optic 12 and said ring 14, and a plurality of eyelashes 151, salient, regularly distributed over said circular portion 151, resting on the optic 12 of to facilitate the flow of water on the optics 12.
  • the illumination face 6 of the base body 4, in particular of the disc 5 supporting said light-emitting diodes 2 comprises a median part 16 and, on either side, two lateral parts 17 , 18, projecting.
  • Said middle portion 16 is intended to support light-emitting diodes of blue color embedded in a phosphorized gel 19 received in the cavity formed between said two lateral parts 17, 18.
  • the lateral parts receive other light-emitting diodes and in particular light-emitting diodes emitting in the visible range (i.e red or amber color) or in the field of non-visible (i.e UV or I.R.).
  • the middle parts 17, 18 are surrounded by a groove 40, generally circular, receiving the interlocking game near a printed circuit 20, allowing in particular the control of the diodes of the array, row by row.
  • a retaining ring 41 is fixed in particular by means of screws on the lighting face 6 of the disk 5 and makes it possible to keep the printed circuit 20 in the groove 40.
  • the inner edge 42 (of smaller diameter) of this retaining ring 41 has a shoulder 43 whose inclination makes it possible to retain a layer of gel 46 (silicone) covering the diode matrix 2 and in particular said middle and lateral portions 16, 17, 18, or even a portion of the printed circuit 20.
  • an electrical harness 44 extends from inside the housing 80 of the power supply unit 8 to an electrical plug 45 of the printed circuit 20 via a through-hole 38 of the plate 31 of said monoblock element 30.
  • the invention also relates to a lamp post equipped with a lighting device according to the invention, said lighting face being directed downwards.
  • the present application concerns, in addition to the invention, the matrix of diodes, as such, and more particularly, the base body 4, the support face of the light-emitting diodes 2 comprises a middle portion 16, and on both sides , two lateral parts 17, 18, projecting.
  • the middle part 16 is intended to support light-emitting diodes of blue-colored contours embedded in a phosphor gel 19.
  • This gel is received (strictly) in the cavity formed between the two lateral parts 17, 18 and makes it possible to modify the emission of the blue diodes in order to obtain light perceived as white.
  • the middle portions 17, 18 receive on their surface other diodes and in particular light-emitting diodes emitting the visible range (i.e. red or other color) or in the visible range (ie UV or I.R).
  • the diodes of the middle part 16 and that of the lateral parts can advantageously be controlled independently, row by row, by pulse width modulation (PWM). All of these parts 16,17,18,19 is covered with a layer of gel 46.
  • the concentration of the diodes of the medial and lateral parts is such that a user perceives only one light source, and not a plurality of points.
  • the surface density of the diodes can be 12 to 20 light emitting diodes per cm 2 .
  • the present applicant reserves the right to file a divisional application for this matrix of diodes.
  • Second heat sink 11 One-piece element (second heat sink 11) 111 fins (second heat sink 11).

Abstract

The invention relates to an illuminating device (1) comprising light-emitting diodes, said device being equipped with a heat dissipator comprising a radiator, characterized in that said heat dissipator comprises: a base (4), one of the sides of the base (4), called the illuminating side, bearing said light-emitting diodes, said illuminating side being intended to be directed downwards, and the other side of the base (4), called the heat transmitting side (7), making contact with the radiator (3); the radiator (3), consisting of a single-part element, comprising: a plate (31), one of the sides of the plate making contact with said heat transmitting side (7) of the base (4); and fins (32) extending around said plate (31), said fins (32) being oriented substantially perpendicular to said plate (31) in such a way as to allow the light-emitting diodes to be cooled by natural convection.

Description

Dispositif d'éclairage à diodes électroluminescentes  Light-emitting diode lighting device
L'invention est relative à un dispositif d'éclairage à diodes électroluminescentes équipé d'un dissipateur d'énergie thermique, et trouvera une application particulière comme tête d'éclairage pour lampadaire. The invention relates to a lighting device with light emitting diodes equipped with a heat sink, and will find a particular application as a lighting head for street lamp.
Le domaine de l'invention est celui des dispositifs d'éclairage publics, tels que lampadaires ou similaires.  The field of the invention is that of public lighting devices, such as street lights or the like.
Dans le domaine de l'éclairage public, on connaît des têtes d'éclairage comprenant un abat-jour, équipé de matrices de diodes électroluminescentes et d'un dissipateur de chaleur pour évacuer la chaleur engendrée par lesdites diodes.  In the field of public lighting, there are known lighting heads comprising a lampshade, equipped with light-emitting diode arrays and a heat sink for evacuating the heat generated by said diodes.
Par exemple le document EP2189 709A1 divulgue un dispositif d'éclairage à diodes électroluminescentes, plus particulièrement un lampadaire, comprenant un dissipateur de chaleur.  For example, document EP2189 709A1 discloses a lighting device with light-emitting diodes, more particularly a lamp post, comprising a heat sink.
Cet abat-jour comprend une tôle supérieure et une tôle inférieure conformées et assemblées entre elles de manière à former un corps creux recevant intérieurement des rails de diodes électroluminescentes. Les tôles sont pourvues de perforations de manière à constituer un abat-jour, perméable à l'air, constituant un dissipateur de chaleur.  This shade comprises an upper plate and a lower plate shaped and assembled together so as to form a hollow body internally receiving light emitting diode rails. The sheets are provided with perforations so as to form a blind, breathable, constituting a heat sink.
La mise en température de cet abat-jour permet de créer, par les phénomènes de convention, un flux d'air assurant le refroidissement des diodes électroluminescentes .  The heating of this lampshade makes it possible to create, by convention phenomena, a flow of air ensuring the cooling of the light-emitting diodes.
D'autres dispositifs d'éclairage à diodes électroluminescentes, chacun équipé d'un dissipateur de chaleur, sont connus de l'état de la technique, tels que par exemple, ceux des documents W02010/119146A1 ou encore WO2009/157662A2.  Other lighting devices with light-emitting diodes, each equipped with a heat sink, are known from the state of the art, such as for example those of documents WO2010 / 119146A1 or WO2009 / 157662A2.
Le but de la présente invention est de proposer un dispositif d'éclairage à diodes électroluminescentes équipé d'un dissipateur d'énergie thermique, et dont les performances de refroidissement sont améliorées.  The object of the present invention is to provide a lighting device with light emitting diodes equipped with a heat sink, and whose cooling performance is improved.
Un autre but de la présente invention est de proposer un tel dispositif d'éclairage intégrant la partie d'électronique nécessaire à l'alimentation, voir au pilotage des diodes électroluminescentes.  Another object of the present invention is to provide such a lighting device integrating the electronic part necessary for power supply, see the driving of the light emitting diodes.
Un autre but de la présente invention est de proposer un tel dispositif d'éclairage de conception simplifiée, minimisant le nombre de pièces requises à sa fabrication. Another object of the present invention is to propose such a lighting device of simplified design, minimizing the number of parts required for its manufacturing.
Un autre but de la présente invention est de proposer un tel dispositif d'éclairage ne nécessitant que peu d'entretien.  Another object of the present invention is to provide such a lighting device requiring little maintenance.
D'autre buts et avantages apparaîtront au cours de la description qui va suivre qui n'est donnée qu'à titre indicatif et qui n'a pas pour but de la limiter.  Other goals and advantages will become apparent from the following description which is given for information only and which is not intended to limit it.
L'invention concerne un dispositif d'éclairage à diodes électroluminescentes équipé d'un dissipateur d'énergie thermique comprenant un radiateur.  The invention relates to a light-emitting diode lighting device equipped with a heat dissipator comprising a radiator.
Selon l'invention, le dissipateur d'énergie thermique comprend :  According to the invention, the heat dissipator comprises:
- un corps de base, l'une des faces du corps de base, dite face d'éclairage supportant lesdites diodes électroluminescentes, ladite face d'éclairage étant destinée à être dirigée vers le bas, l'autre face du corps de base, dite face de transmission de chaleur étant en contact avec le radiateur,  a base body, one of the faces of the base body, said lighting face supporting said light-emitting diodes, said lighting face being intended to be directed downwards, the other face of the base body, so-called heat transfer face being in contact with the radiator,
- le radiateur constitué par un élément monobloc comprenant :  the radiator constituted by a monobloc element comprising:
- une plaque, l'une des faces de la plaque étant en contact avec ladite face de transmission de chaleur du disque,  a plate, one of the faces of the plate being in contact with said heat transfer face of the disk,
- des ailettes s 'étendant autour de ladite plaque, lesdites ailettes étant orientées sensiblement perpendiculaires à ladite plaque, de telle façon à permettre le refroidissement des diodes électroluminescentes par convection naturelle.  fins extending around said plate, said fins being oriented substantially perpendicular to said plate, so as to allow the cooling of the light-emitting diodes by natural convection.
Selon un mode de réalisation de l'invention :  According to one embodiment of the invention:
- le corps de base présente un chanfrein sur sa circonférence entre ladite face de transmission et la tranche du corps de base,  the base body has a chamfer on its circumference between said transmission face and the edge of the basic body,
- la face de la plaque du radiateur en contact avec ladite face de transmission de chaleur présente une cavité de forme complémentaire à celle du corps de base, avec une surface plane en contact avec la face de transmission de chaleur et une partie biseautée en contact avec le chanfrein.  the face of the radiator plate in contact with said heat-transmitting face has a cavity of complementary shape to that of the base body, with a flat surface in contact with the heat-transmitting face and a bevelled part in contact with the chamfer.
Selon des caractéristiques optionnelles de l'invention, prises seules ou en combinaison :  According to optional features of the invention, taken alone or in combination:
- ladite face de la plaque du radiateur en contact avec la face de transmission de chaleur est dite face inférieure, des parois dudit élément monobloc s'étendant en saillie depuis l'autre face de la plaque, dite face supérieure, lesdites parois étant orientées sensiblement perpendiculaires à ladite plaque, lesdites ailettes étant solidaires par leur bord intérieur desdites parois ; said face of the radiator plate in contact with the heat transmission face is called the lower face, walls of said one-piece element projecting from the other side of the plate, said upper face, said walls being oriented substantially perpendicular to said plate, said fins being secured by their inner edge of said walls;
- le dispositif présente un groupe d'alimentation, lesdites parois dudit élément monobloc formant un logement, notamment de forme rectangulaire, à l'intérieur duquel est reçu le groupe d'alimentation ;  - The device has a feed group, said walls of said monobloc member forming a housing, in particular of rectangular shape, inside which is received the feed group;
- le groupe d'alimentation est reçu dans un boîtier positionné dans ledit logement de telle façon à créer une lame d'air entre l'intérieur du logement et le boîtier du groupe d'alimentation, ladite plaque dudit radiateur présentant des orifices d'évents de telle façon à autoriser la circulation de ladite lame d'air par convection naturelle ;  - The power pack is received in a housing positioned in said housing so as to create a blade of air between the interior of the housing and the housing of the power pack, said plate of said radiator having vents orifices in such a way as to allow the circulation of said air gap by natural convection;
- ledit radiateur est dit premier radiateur, le groupe d'alimentation comprenant un deuxième radiateur, distinct dudit premier radiateur, ledit deuxième radiateur étant constitué par un élément monobloc pourvu d'ailettes, notamment prévues dans le prolongement des ailettes dudit premier radiateur;  said radiator is said first radiator, the power unit comprising a second radiator, distinct from said first radiator, said second radiator being constituted by a monobloc element provided with fins, in particular provided in the extension of the fins of said first radiator;
- le dispositif présente une optique disposée au droit desdites diodes électroluminescentes et dans lequel la face de la plaque du dissipateur en contact avec la face de transmission de chaleur présente un épaulement dimensionné pour la réception de l'optique ;  - The device has an optical arranged in line with said light emitting diodes and wherein the face of the dissipator plate in contact with the heat transmission face has a shoulder dimensioned for the reception of the optics;
- l'optique est maintenue dans épaulement par l'intermédiaire d'une bague amovible, un joint à cils permettant l'écoulement de l'eau de pluie sur la surface de l'optique ;  - The optics is maintained in shoulder by means of a removable ring, an eyelash seal allowing the flow of rain water on the surface of the optics;
- la face d'éclairage du corps de base supportant lesdites diodes électroluminescentes comprend une partie médiane et, de part et d'autre, deux parties latérales en saillie, ladite partie médiane supportant des diodes électroluminescentes de couleur bleue noyées dans un gel phosphoré, le gel étant reçu dans la cavité formée entre lesdites deux parties latérales, les parties latérales recevant d'autres diodes électroluminescentes ;  the lighting face of the base body supporting said light-emitting diodes comprises a middle part and, on either side, two projecting lateral parts, said middle part supporting blue-light-emitting diodes embedded in a phosphorized gel, the gel being received in the cavity formed between said two lateral parts, the lateral parts receiving other light-emitting diodes;
- le corps de base est dans un métal à base de cuivre et ledit élément monobloc du dissipateur en aluminium, un revêtement à base d'argent, d'épaisseur inférieure à 100 microns, facilitant le transfert de chaleur entre le corps de base et ledit élément monobloc ;  the base body is in a copper-based metal and said monoblock element of the aluminum dissipator, a silver-based coating, of thickness less than 100 microns, facilitating the transfer of heat between the base body and said monobloc element;
- la longueur des ailettes selon ladite direction sensiblement perpendiculaire à la plaque est supérieure au tiers de la plus petite dimension du corps de base, selon une direction parallèle à ladite plaque. L'invention concerne également un lampadaire équipé d'un dispositif d'éclairage conforme à l'invention, ladite face d'éclairage étant dirigée vers le bas. - The length of the fins in said direction substantially perpendicular to the plate is greater than one-third of the smallest dimension of the base body, in a direction parallel to said plate. The invention also relates to a lamp post equipped with a lighting device according to the invention, said lighting face being directed downwards.
L'invention sera mieux comprise à la lecture de la description suivante accompagnée des figures en annexe parmi lesquelles :  The invention will be better understood on reading the following description accompanied by the appended figures, among which:
- La figure 1 est une vue en perspective d'un dispositif d'éclairage conforme à l'invention selon un mode de réalisation.  - Figure 1 is a perspective view of a lighting device according to the invention according to one embodiment.
- La figure 2 est une vue de coupe du dispositif tel qu'illustré à la figure FIG. 2 is a sectional view of the device as illustrated in FIG.
1. 1.
- La figure 3 est une vue en éclaté du dispositif tel qu'illustré à la figure 1.  - Figure 3 is an exploded view of the device as shown in Figure 1.
- La figure 4 est une vue de coupe du dispositif tel qu'illustré à la figure FIG. 4 is a sectional view of the device as illustrated in FIG.
1. 1.
- La figure 5 est une vue de détail de la matrice de diode supportée par le corps de base.  FIG. 5 is a detailed view of the diode matrix supported by the base body.
- La figure 6 est une vue de coupe de la matrice telle qu'illustrée à la figure 5,  FIG. 6 is a sectional view of the matrix as illustrated in FIG. 5;
- La figure 7 est une vue illustrant le relief particulier de la face d'éclairage du corps de base.  - Figure 7 is a view illustrating the particular relief of the illumination face of the base body.
- La figure 8 est une vue en perspective de dessus d'un dispositif d'éclairage, selon un second mode de réalisation de l'invention, de forme rectangulaire,  FIG. 8 is a perspective view from above of a lighting device, according to a second embodiment of the invention, of rectangular shape,
- La figure 9 est une vue de dessous du dispositif de la figure 8.  FIG. 9 is a view from below of the device of FIG. 8.
Aussi l'invention concerne un dispositif d'éclairage 1 à diodes électroluminescentes 2 équipé d'un dissipateur d'énergie thermique comprenant un radiateur 3 et dont la fonction est d'assurer le refroidissement desdites diodes électroluminescentes 2.  Also, the invention relates to a lighting device 1 with light-emitting diodes 2 equipped with a heat dissipator comprising a heat sink 3 and whose function is to ensure the cooling of said light-emitting diodes 2.
Selon l'invention ledit dissipateur d'énergie thermique comprend :  According to the invention, said heat dissipator comprises:
- un corps de base 4, l'une des faces du corps de base 4, dite face d'éclairage 6 supportant lesdites diodes électroluminescentes 2, ladite face d'éclairage 6 étant destinée à être dirigée vers le bas, l'autre face du corps de base 4, dite face 7 de transmission de chaleur étant en contact avec le radiateur 3,  a base body 4, one of the faces of the base body 4, said lighting face 6 supporting said light-emitting diodes 2, said lighting face 6 being intended to be directed downwards, the other face of the base body 4, said face 7 of heat transmission being in contact with the radiator 3,
- ledit radiateur 3 constitué par un élément monobloc 30 comprenant :  said radiator 3 constituted by a monoblock element 30 comprising:
- une plaque 31, l'une des faces de la plaque étant en contact avec ladite face 7 de transmission de chaleur du disque 5, a plate 31, one of the faces of the plate being in contact with said heat transfer face 7 of the disk 5,
- des ailettes 32 s 'étendant autour de ladite plaque 31, le cas échéant, radialement et régulièrement réparties autour de l'axe Δ du corps de base 4, lesdites ailettes 31 étant orientées sensiblement perpendiculairement à ladite plaque 31 de telle façon à permettre le refroidissement des diodes électroluminescentes 2 par convection naturelle.  - fins 32 extending around said plate 31, where appropriate, radially and evenly distributed about the axis Δ of the base body 4, said fins 31 being oriented substantially perpendicular to said plate 31 so as to allow the cooling of the light-emitting diodes 2 by natural convection.
De préférence, le corps de base 4 est dans un métal à base de cuivre et ledit élément monobloc 30 du radiateur 3 en aluminium.  Preferably, the base body 4 is in a copper-based metal and said monobloc element 30 of the aluminum radiator 3.
Avantageusement un revêtement à base d'argent, d'épaisseur inférieure à 100 microns, notamment compris entre 10 et 70 microns (i.e 30 microns) peut être prévu entre le radiateur 3 et le corps de base afin de faciliter le transfert de chaleur entre ces deux éléments.  Advantageously, a coating based on silver, of thickness less than 100 microns, especially between 10 and 70 microns (ie 30 microns) may be provided between the radiator 3 and the base body to facilitate heat transfer between these two elements.
De même, les diodes électroluminescentes peuvent être assujetties (i.e soudées) sur la face d'éclairage 6 du disque 5 par l'intermédiaire d'un revêtement à base d'argent, d'épaisseur inférieure à 100 microns, notamment compris entre 10 et 70 microns (i.e. 30 microns).  Similarly, the light-emitting diodes may be secured (ie soldered) to the illumination face 6 of the disc 5 by means of a silver-based coating, less than 100 microns thick, in particular between 10 and 70 microns (ie 30 microns).
Dans un tel système, la chaleur engendrée par les diodes électroluminescentes est transmise au corps de base 4, puis au radiateur 3.  In such a system, the heat generated by the light-emitting diodes is transmitted to the base body 4, then to the radiator 3.
La mise en température du radiateur 3 crée un gradient de température favorisant la circulation d'air entre les ailettes 32, par convection naturelle.  The heating of the radiator 3 creates a temperature gradient promoting the air circulation between the fins 32, by natural convection.
Selon l'exemple des figures 1 à 7, le corps de base 4 prend la forme générale d'un disque 5. Toutefois de nombreuses autres formes sont envisageables pour le corps de base 4 tel que par exemple un corps mince de forme carrée, en étoile ou autre...  According to the example of Figures 1 to 7, the basic body 4 takes the general shape of a disc 5. However, many other forms are possible for the base body 4 such as for example a thin body of square shape, in star or other ...
Par ailleurs, les ailettes 32 sont, selon les exemples illustrés aux figures, dirigées suivant leur longueur strictement perpendiculairement au plan de la plaque 31.  Moreover, the fins 32 are, according to the examples illustrated in the figures, directed along their length strictly perpendicular to the plane of the plate 31.
Ces ailettes peuvent toutefois n'être pas strictement perpendiculaires au plan de la plaque 31, mais présenter une légère inclinaison avec la perpendiculaire, et notamment une inclinaison par rapport à la perpendiculaire comprise entre 0° et 15°.  These fins may however not be strictly perpendicular to the plane of the plate 31, but have a slight inclination with the perpendicular, and in particular an inclination relative to the perpendicular between 0 ° and 15 °.
Par ailleurs, selon l'exemple des figures 1 à 6, les ailettes 32 sont réparties angulairement, régulièrement autour de l'axe Δ du disque 5, dirigées selon des directions radiales.  Furthermore, according to the example of Figures 1 to 6, the fins 32 are angularly distributed regularly around the axis Δ of the disk 5, directed in radial directions.
D'autres agencements des ailettes 32 sont toutefois possibles les ailettes pouvant être parallèles entre elles, par sections, autour de ladite plaque 31. Other arrangements of the fins 32 are however possible the fins being able to be parallel to one another in sections around said plate 31.
Selon un mode de réalisation avantageux, illustré plus particulièrement aux figures 4 et 6 :  According to an advantageous embodiment, illustrated more particularly in FIGS. 4 and 6:
- le corps de base 4 (notamment le disque 5) présente un chanfrein 50 sur sa circonférence entre ladite face 7 de transmission de chaleur et la tranche du corps de base 4,  the base body 4 (in particular the disk 5) has a chamfer 50 on its circumference between said heat transfer face 7 and the edge of the base body 4,
- la face de la plaque 31 du radiateur 3 en contact avec la face 7 de transmission de chaleur présente une cavité 33 de forme complémentaire à celle du corps de base 4, notamment du disque 5, avec une surface plane 34 en contact avec la face 7 de transmission de chaleur et une partie biseautée 35 en contact avec la surface du chanfrein 50.  - The face of the plate 31 of the radiator 3 in contact with the heat transfer face 7 has a cavity 33 of complementary shape to that of the base body 4, in particular the disc 5, with a flat surface 34 in contact with the face 7 and a beveled portion 35 in contact with the surface of the bevel 50.
Telle qu'illustrée dans l'exemple des figures 1 à 6 pour lequel le corps de base 4 est un disque 5, cette partie biseautée 35 est tronconique. Dans le cas d'un corps de base de forme carrée, cette partie biseautée affecterait une forme en tronc de pyramide.  As illustrated in the example of Figures 1 to 6 for which the base body 4 is a disk 5, this beveled portion 35 is frustoconical. In the case of a square base body, this beveled portion would affect a truncated pyramid shape.
Un tel assemblage permet notamment d'augmenter les surfaces d'échanges entre le corps de base 4 et le radiateur 3, et d'une manière générale d'améliorer les performances du dissipateur d'énergie thermique.  Such an assembly makes it possible in particular to increase the exchange surfaces between the base body 4 and the radiator 3, and generally to improve the performance of the heat sink.
Par ailleurs l'inventeur a constaté de bonnes performances de refroidissement lorsque la longueur des ailettes 32 selon ladite direction sensiblement perpendiculaire à la plaque 31 est supérieure au tiers de la plus petite dimension du corps de base 4, selon une direction parallèle à ladite plaque 31.  Moreover, the inventor has found good cooling performance when the length of the fins 32 in said direction substantially perpendicular to the plate 31 is greater than one-third of the smallest dimension of the base body 4, in a direction parallel to said plate 31 .
Par exemple dans l'exemple illustré aux figures 1 à 6, cela se traduit par une longueur d'ailette 32, suivant le sens de la hauteur, supérieure au tiers (1/3) du diamètre du disque 5.  For example in the example illustrated in Figures 1 to 6, this results in a fin length 32, in the direction of height, greater than one third (1/3) of the diameter of the disc 5.
Suivant les exemples illustrés, l'élément monobloc 30 du radiateur 3 constitue un abat-jour perméable à l'air.  According to the illustrated examples, the monobloc element 30 of the radiator 3 constitutes an air-permeable shade.
Selon un mode de réalisation, ladite face de la plaque du radiateur 3 en contact avec la face 7 de transmission de chaleur est dite face inférieure, des parois 36 dudit élément monobloc 30 s'étendant depuis l'autre face de la plaque 31, dite face supérieure, lesdites parois 36 étant orientées perpendiculairement au plan de ladite plaque 31, lesdites ailettes 32 étant solidaires par leur bord intérieur desdites parois 36.  According to one embodiment, said face of the radiator plate 3 in contact with the heat transfer face 7 is said lower face, walls 36 of said one-piece element 30 extending from the other face of the plate 31, so-called upper face, said walls 36 being oriented perpendicular to the plane of said plate 31, said fins 32 being integral by their inner edge of said walls 36.
Selon un mode de réalisation, le dispositif d'éclairage comprend un groupe d'alimentation 8 comprenant l'électronique nécessaire pour l'alimentation, voire le pilotage des diodes. According to one embodiment, the lighting device comprises a power supply unit 8 comprising the electronics necessary for powering or even driving the diodes.
Selon le mode de réalisation de la figure 4, lesdites parois 36 dudit élément monobloc 30 forment un logement 9, notamment de forme rectangulaire (vue de dessus) ; à l'intérieur duquel est reçu le groupe d'alimentation 8.  According to the embodiment of FIG. 4, said walls 36 of said one-piece element 30 form a housing 9, in particular of rectangular shape (seen from above); inside which feed group 8 is received.
De préférence, le groupe d'alimentation 8 est reçu dans un boîtier 80, de forme complémentaire au logement, positionné dans ledit logement 9 de telle façon à créer une lame d'air 10 entre l'intérieur du logement 9 et le boîtier 80 du groupe d'alimentation 8, et plus particulièrement une lame d'air entre la face inférieure du boîtier 80 et la face supérieure de la plaque 31, ainsi qu'une lame d'air entre chacune des quatre parois latérales du boîtier 80 et la paroi 36 correspondante formant le logement 9.  Preferably, the feed group 8 is received in a housing 80, complementary in shape to the housing, positioned in said housing 9 so as to create an air gap 10 between the interior of the housing 9 and the housing 80 of the housing. feed group 8, and more particularly an air gap between the underside of the housing 80 and the upper face of the plate 31, and an air gap between each of the four side walls of the housing 80 and the wall 36 corresponding forming the housing 9.
Avantageusement, ladite plaque 31 dudit radiateur 3 présente des orifices d'évents 37 de telle façon à autoriser la circulation de ladite lame d'air par convection naturelle. Cette circulation de la lame d'air, illustrée par les flèches à la figure 4, assure le refroidissement du groupe d'alimentation, mais également celui du radiateur 3.  Advantageously, said plate 31 of said radiator 3 has vent holes 37 so as to allow the circulation of said air knife by natural convection. This circulation of the air space, illustrated by the arrows in FIG. 4, ensures the cooling of the supply unit, but also that of the radiator 3.
Selon un mode de réalisation illustré à la figure 4, ledit radiateur est dit premier radiateur 3, le groupe d'alimentation 8 comprenant un deuxième radiateur 11, distinct dudit premier radiateur 3, ledit deuxième radiateur 11 étant constitué par un élément monobloc 110 pourvu d'ailettes 111. La fonction de deuxième radiateur est d'assurer le refroidissement du groupe d'alimentation 8 ; et notamment de ses composants électroniques constitutifs.  According to an embodiment illustrated in Figure 4, said radiator is said first radiator 3, the power unit 8 comprising a second radiator 11, separate from said first radiator 3, said second radiator 11 being constituted by a monobloc element 110 provided with 111. The function of second radiator is to ensure the cooling of the feed group 8; and in particular of its constituent electronic components.
Selon le mode de réalisation illustré aux figures, l'élément monobloc 110 du radiateur 11 cumule également une fonction de couvercle pour fermer l'ouverture supérieure du boîtier 80 dudit groupe d'alimentation 8. Un joint 81 permet de réaliser l'étanchéité entre le boîtier 80 et ce couvercle.  According to the embodiment illustrated in the figures, the monobloc element 110 of the radiator 11 also accumulates a cover function to close the upper opening of the housing 80 of said power supply unit 8. A seal 81 makes it possible to seal between the housing 80 and this cover.
Telles qu'illustrées, les ailettes 111 du deuxième radiateur 11 peuvent être prévues dans le prolongement des ailettes 32 dudit premier radiateur 3. L'élément monobloc 110 peut être constitué en aluminium et, est notamment obtenu par moulage.  As illustrated, the fins 111 of the second radiator 11 may be provided in the extension of the fins 32 of said first radiator 3. The one-piece element 110 may be made of aluminum and, in particular is obtained by molding.
Selon l'exemple illustré à la figure 4, le corps monobloc 110 présente un logement, recevant un dispositif de connexion 22 entre un câble d'alimentation 21 et le groupe d'alimentation 8, et apte à réaliser une protection de classe II selon la norme NF C 15-100. Ce dispositif de connexion 22 comprend un boîtier 23 dans une matière électriquement isolante (i.e plastique) dont l'ouverture supérieure est fermée par un couvercle 24, de manière étanche par l'intermédiaire d'un joint 25. Les parties à nues des câbles électriques sont reliées dans le volume interne du boîtier 23, grâce à un connecteur électrique. According to the example illustrated in FIG. 4, the one-piece body 110 has a housing, receiving a connection device 22 between a power supply cable 21 and the power supply unit 8, and capable of providing a class II protection according to FIG. standard NF C 15-100. This connection device 22 comprises a housing 23 in an electrically insulating material (ie plastic) whose upper opening is closed by a cover 24, sealingly via a gasket 25. The bare parts of the electric cables are connected in the internal volume of the housing 23, through an electrical connector.
Selon un mode de réalisation, le dispositif d'éclairage présente une optique 12 disposée au droit desdites diodes électroluminescentes 2.  According to one embodiment, the lighting device has an optic 12 arranged in line with said light-emitting diodes 2.
De préférence, les diodes électroluminescentes 2 sont concentrées sur la face d'éclairage du corps de base de telle façon à ce que l'utilisateur final ne distingue qu'une source de lumière, et non une pluralité de points lumineux.  Preferably, the light-emitting diodes 2 are concentrated on the illumination face of the base body so that the end user only distinguishes one light source, and not a plurality of light spots.
A cet effet la densité surfacique des diodes peut être de 12 à 20 diodes électroluminescentes par cm .  For this purpose the surface density of the diodes can be from 12 to 20 light-emitting diodes per cm.
Avantageusement et afin de limiter l'éblouis sèment, le diamètre moyen de cette optique 12 est supérieure à quatre fois le diamètre moyen de la surface d'émission de ladite face d'éclairage 6 du corps de base.  Advantageously and in order to limit glare, the average diameter of this optic 12 is greater than four times the average diameter of the emission surface of said illumination face 6 of the base body.
On entend par surface d'émission de la face d'éclairage 6, la plus petite surface portant toutes les diodes électroluminescentes 2 du corps de base 4.  By emission surface of the illumination face 6 is meant the smallest area carrying all the light-emitting diodes 2 of the base body 4.
Selon l'exemple des figures, le diamètre moyen de la surface d'émission est d'environ 28mm et le diamètre moyen de l'optique est de 127mm.  According to the example of the figures, the average diameter of the emission surface is about 28 mm and the average diameter of the optics is 127 mm.
La face de la plaque 31 du radiateur 3 en contact avec la face de transmission de chaleur peut présenter un épaulement 13, notamment circulaire, dimensionné pour la réception de l'optique 12, de forme circulaire correspondant au jeu d'emboîtement près. The face of the plate 31 of the radiator 3 in contact with the heat transmission face may have a shoulder 13, in particular circular, sized for the reception of the optical 12, circular shape corresponding to the interlocking game near.
La forme circulaire permet avantageusement de régler l'orientation de l'optique et ainsi l'éclairage lorsque l'optique 12 est une optique asymétrique.  The circular shape advantageously makes it possible to adjust the orientation of the optics and thus the illumination when the optics 12 is asymmetrical optics.
L'optique 12 est maintenue dans l'épaulement 13 par l'intermédiaire d'une bague 14, amovible, et par un système type, coopérant avec ledit élément monobloc 30. Le système est ainsi évolutif et interchangeable.  The optic 12 is held in the shoulder 13 by means of a ring 14, removable, and a typical system, cooperating with said monobloc element 30. The system is thus scalable and interchangeable.
Avantageusement, un joint à cils 15 permet l'écoulement de l'eau de pluie sur la surface de l'optique 12 afin d'assurer auto-nettoyage de l'optique 12.  Advantageously, an eyelash seal 15 allows the flow of rainwater on the surface of the optics 12 to ensure self-cleaning of the optics 12.
Ce joint à cils 15 est constitué dans une matière élastomère par un élément d'un seul tenant présentant une partie circulaire 150 destiné à être pincée entre l'optique 12 et ladite bague 14, et un pluralité de cils 151, saillant, régulièrement répartis sur ladite partie circulaire 151, en appui sur l'optique 12 de façon à faciliter l'écoulement de l'eau sur l'optique 12. This eyelash seal 15 is made of an elastomeric material by a integral element having a circular portion 150 intended to be clamped between the optic 12 and said ring 14, and a plurality of eyelashes 151, salient, regularly distributed over said circular portion 151, resting on the optic 12 of to facilitate the flow of water on the optics 12.
Selon un mode de réalisation illustré à la figure 7, la face d'éclairage 6 du corps de base 4, notamment du disque 5 supportant lesdites diodes électroluminescentes 2 comprend une partie médiane 16 et, de part et d'autre, deux parties latérales 17,18, en saillie. Ladite partie médiane 16 a pour objet de supporter des diodes électroluminescentes de couleur bleu noyées dans un gel phosphoré 19 reçu dans la cavité formée entre lesdites deux parties latérales 17, 18.  According to an embodiment illustrated in FIG. 7, the illumination face 6 of the base body 4, in particular of the disc 5 supporting said light-emitting diodes 2, comprises a median part 16 and, on either side, two lateral parts 17 , 18, projecting. Said middle portion 16 is intended to support light-emitting diodes of blue color embedded in a phosphorized gel 19 received in the cavity formed between said two lateral parts 17, 18.
Les parties latérales reçoivent d'autres diodes électroluminescentes et notamment des diodes électroluminescentes émettant dans le domaine du visible (i.e couleur rouge ou ambre) ou encore dans le domaine du non visible (i.e UV ou I.R.).  The lateral parts receive other light-emitting diodes and in particular light-emitting diodes emitting in the visible range (i.e red or amber color) or in the field of non-visible (i.e UV or I.R.).
Les parties médianes 17, 18 sont entourées par une gorge 40, globalement circulaire, recevant au jeu d'emboîtement près un circuit imprimé 20, permettant notamment le contrôle des diodes de la matrice, rangée par rangée.  The middle parts 17, 18 are surrounded by a groove 40, generally circular, receiving the interlocking game near a printed circuit 20, allowing in particular the control of the diodes of the array, row by row.
Une bague de maintien 41 est fixée notamment au moyen de vis sur la face d'éclairage 6 du disque 5 et permet de maintenir le circuit imprimé 20 dans la gorge 40.  A retaining ring 41 is fixed in particular by means of screws on the lighting face 6 of the disk 5 and makes it possible to keep the printed circuit 20 in the groove 40.
Le bord intérieur 42 (de plus petit diamètre) de cette bague de maintien 41 présente un épaulement 43 dont l'inclinaison permet de retenir une couche de gel 46 (silicone) recouvrant la matrice de diode 2 et notamment lesdites parties médiane et latérales 16, 17, 18, voire une partie du circuit imprimé 20.  The inner edge 42 (of smaller diameter) of this retaining ring 41 has a shoulder 43 whose inclination makes it possible to retain a layer of gel 46 (silicone) covering the diode matrix 2 and in particular said middle and lateral portions 16, 17, 18, or even a portion of the printed circuit 20.
On notera qu'un faisceau électrique 44 s'étend depuis l'intérieur du boîtier 80 du groupe d'alimentation 8 jusqu'à une fiche électrique 45 du circuit imprimé 20 par l'intermédiaire d'un trou traversant 38 de la plaque 31 dudit élément monobloc 30.  It will be noted that an electrical harness 44 extends from inside the housing 80 of the power supply unit 8 to an electrical plug 45 of the printed circuit 20 via a through-hole 38 of the plate 31 of said monoblock element 30.
L'invention concerne également un lampadaire équipé d'un dispositif d'éclairage conforme à l'invention, ladite face d'éclairage étant dirigée vers le bas.  The invention also relates to a lamp post equipped with a lighting device according to the invention, said lighting face being directed downwards.
La présente demande concerne, outre l'invention, la matrice de diodes, en tant que telle, et plus particulièrement, le corps de base 4 dont la face support des diodes électroluminescentes 2 comprend une partie médiane 16, et de part et d'autre, deux parties latérales 17, 18, en saillie.  The present application concerns, in addition to the invention, the matrix of diodes, as such, and more particularly, the base body 4, the support face of the light-emitting diodes 2 comprises a middle portion 16, and on both sides , two lateral parts 17, 18, projecting.
Telle que développée, la partie médiane 16 a pour objet de supporter des diodes électroluminescentes de contours de couleur bleue noyées dans un gel phosphoré 19. Ce gel est reçu (strictement) dans la cavité formée entre les deux parties latérales 17, 18 et permet de modifier l'émission des diodes bleues afin d'obtenir de la lumière perçue comme blanche. As developed, the middle part 16 is intended to support light-emitting diodes of blue-colored contours embedded in a phosphor gel 19. This gel is received (strictly) in the cavity formed between the two lateral parts 17, 18 and makes it possible to modify the emission of the blue diodes in order to obtain light perceived as white.
Les parties médianes 17, 18 reçoivent sur leur surface d'autres diodes et notamment des diodes électroluminescentes émettant le domaine du visible (i.e. couleur rouge ou autre) ou encore dans le domaine du visible (i.e. UV ou I.R). Les diodes de la partie médiane 16 et celle des parties latérales peuvent être avantageusement contrôlées de manière indépendante, rangée par rangée, par modulation de largeur d'impulsion (PWM). L'ensemble de ces parties 16,17,18,19 est recouvert d'une couche de gel 46.  The middle portions 17, 18 receive on their surface other diodes and in particular light-emitting diodes emitting the visible range (i.e. red or other color) or in the visible range (ie UV or I.R). The diodes of the middle part 16 and that of the lateral parts can advantageously be controlled independently, row by row, by pulse width modulation (PWM). All of these parts 16,17,18,19 is covered with a layer of gel 46.
La concentration des diodes des parties médianes et latérales est telle qu'un utilisateur ne perçoit qu'une source lumineuse, et non une pluralité de points. A cet effet la densité surfacique des diodes peut être de 12 à 20 diodes électroluminescentes par cm2. The concentration of the diodes of the medial and lateral parts is such that a user perceives only one light source, and not a plurality of points. For this purpose the surface density of the diodes can be 12 to 20 light emitting diodes per cm 2 .
Le présent demandeur se réserve le droit de déposer une demande divisionnaire pour cette matrice de diodes.  The present applicant reserves the right to file a divisional application for this matrix of diodes.
Naturellement d'autres modes de réalisation de l'invention auraient pu être envisagés sans pour autant sortir du cadre de l'invention défini par les revendications ci-après. Naturally other embodiments of the invention could have been envisaged without departing from the scope of the invention defined by the claims below.
NOMENCLATURE NOMENCLATURE
1 Dispositif d'éclairage,  1 lighting device,
2 Diodes électroluminescentes,  2 light-emitting diodes,
3 Radiateur 3 Radiator
4 Corps de base,  4 Basic body,
5 Disque (corps de base 4),  5 Disc (basic body 4),
6 Face d'éclairage (Corps de base 4),  6 Lighting Face (Base Body 4),
7 Face de transmission de chaleur (Corps de base 4),  7 Heat Transmission Face (Base Body 4),
8 Groupe alimentation, 8 Food group,
9 Logement de l'élément monobloc (pour groupe d'alimentation), 9 Monobloc element housing (for power supply unit),
10 Lame d'air, 10 Blade of air,
11 Deuxième radiateur (groupe d'alimentation),  11 Second radiator (power group),
12 Optique,  12 Optics,
13 Epaulement, 13 Shoulders,
14 Bague,  14 Ring,
15 Joint à cils,  15 Eyelash seal,
16 Partie médiane (face d'éclairage 6),  16 Middle part (lighting face 6),
17,18 Parties latérales (face d'éclairage 6), 17,18 Side parts (lighting face 6),
19 Gel phosphoré, 19 Phosphorus gel,
20 Circuit imprimé,  20 Circuit board,
21 Câble électrique d'alimentation,  21 Power supply cable,
22 Dispositif de connexion,  22 Connection device,
23 Boîtier (dispositif de connexion 22),  23 housing (connection device 22),
24 Couvercle (dispositif de connexion 22), 24 cover (connection device 22),
25 Joint,  25 Joint,
30 Elément monobloc (radiateur 3),  Monobloc element (radiator 3),
31 Plaque (élément monobloc 30),  31 Plate (monoblock element 30),
32 Ailettes (élément monobloc 30),  32 fins (monoblock element 30),
33 Cavité de forme complémentaire (plaque), 33 Cavity of complementary shape (plate),
34 Surface plane (cavité 33),  34 Flat surface (cavity 33),
35 Partie biseautée (cavité 33), 36 Parois élément (élément monobloc 30),Tapered portion (cavity 33), 36 Wall element (monobloc element 30),
37 Orifices d'évents, 37 vent holes,
38 Trou traversant,  38 through hole,
40 Circuit imprimé, 40 Circuit board,
41 Bague de maintien, 41 Retaining ring,
42 Bord intérieur,  42 Inner edge,
43 Epaulement,  43 Shoulder,
44 Faisceau électrique,  44 Harness,
45 Fiche électrique  45 Power plug
46 Couche de gel, 46 Gel layer,
50 Chanfrein (corps de base 4),  50 Chamfer (basic body 4),
80 Boîtier (groupe alimentation 8),  80 Enclosure (power supply group 8),
81 Joint,  81 Joint,
110 Elément monobloc (deuxième dissipateur 11) 111 Ailettes (deuxième dissipateur 11).  110 One-piece element (second heat sink 11) 111 fins (second heat sink 11).

Claims

REVENDICATIONS
1. Dispositif d'éclairage (1) à diodes électroluminescentes (2) équipé d'un dissipateur d'énergie thermique comprenant un radiateur (3) caractérisé en ce que ledit dissipateur d'énergie thermique comprend : Light-emitting diode lighting device (1) (2) equipped with a heat-dissipating heat sink comprising a radiator (3), characterized in that said heat dissipator comprises:
- un corps de base (4), l'une des faces du corps de base (4), dite face d'éclairage (6) supportant lesdites diodes électroluminescentes (2), ladite face d'éclairage (6) étant destinée à être dirigée vers le bas, l'autre face du corps de base (4), dite face de transmission (7) de chaleur étant en contact avec le radiateur (3),  a base body (4), one of the faces of the base body (4), said lighting face (6) supporting said light-emitting diodes (2), said lighting face (6) being intended to be directed downwards, the other face of the base body (4), said heat transmission face (7) being in contact with the radiator (3),
- le radiateur (3) constitué par un élément monobloc (30) comprenant :  the radiator (3) constituted by a monobloc element (30) comprising:
- une plaque (31), l'une des faces de la plaque étant en contact avec ladite face (7) de transmission de chaleur du corps de base (4)  a plate (31), one of the faces of the plate being in contact with said heat transfer face (7) of the base body (4)
- des ailettes (32) s'étendant autour de ladite plaque (31), lesdites ailettes (32) étant orientées sensiblement perpendiculaires à ladite plaque (31) de telle façon à permettre le refroidissement des diodes électroluminescentes (2) par convection naturelle.  - fins (32) extending around said plate (31), said fins (32) being oriented substantially perpendicular to said plate (31) so as to allow the cooling of the light emitting diodes (2) by natural convection.
2. Dispositif selon la revendication 1, dans lequel :  2. Device according to claim 1, wherein:
- le corps de base (4) présente un chanfrein (50) sur sa circonférence entre ladite face (7) de transmission de chaleur et la tranche du corps de base (4),  the base body (4) has a chamfer (50) on its circumference between said heat transfer face (7) and the edge of the base body (4),
- la face de la plaque (31) du radiateur (3) en contact avec la face (7) de transmission de chaleur présente une cavité (33) de forme complémentaire à celle du corps de base(4), avec une surface plane (34) en contact avec la face (7) de transmission de chaleur et une partie biseautée (35) en contact avec le chanfrein (50).  the face of the plate (31) of the radiator (3) in contact with the heat transfer face (7) has a cavity (33) of a shape complementary to that of the base body (4), with a flat surface ( 34) in contact with the heat transfer face (7) and a beveled portion (35) in contact with the chamfer (50).
3. Dispositif selon la revendication 1 ou 2, dans lequel ladite face de la plaque du radiateur en contact avec la face (7) de transmission de chaleur est dite face inférieure, des parois (36) dudit élément monobloc (30) s'étendant depuis l'autre face de la plaque (31), dite face supérieure, lesdites parois (36) étant orientées perpendiculairement à ladite plaque (31), lesdites ailettes (32) étant solidaires par le bord intérieur desdites parois (36).  3. Device according to claim 1 or 2, wherein said face of the radiator plate in contact with the face (7) of heat transmission is said lower face, walls (36) of said monobloc element (30) extending from the other side of the plate (31), said upper face, said walls (36) being oriented perpendicularly to said plate (31), said fins (32) being secured by the inner edge of said walls (36).
4. Dispositif selon la revendication 3, présentant un groupe d'alimentation (8) et dans lequel lesdites parois (36) dudit élément monobloc (30) forment un logement (9), notamment de forme rectangulaire à l'intérieur duquel est reçu le groupe d'alimentation (8). 4. Device according to claim 3, having a feed group (8) and wherein said walls (36) of said monobloc element (30) form a housing (9), in particular of rectangular shape inside which is received the group feeding (8).
5. Dispositif selon la revendication 4, dans lequel le groupe d'alimentation (8) est reçu dans un boîtier positionné dans ledit logement (9) de telle façon à créer une lame d'air (10) entre l'intérieur du logement (9) et le boîtier du groupe d'alimentation (8), ladite plaque (31) dudit radiateur (3) présentant des orifices d'évents (37) de telle façon à autoriser la circulation de ladite lame d'air (10) par convection naturelle.  5. Device according to claim 4, wherein the feed group (8) is received in a housing positioned in said housing (9) so as to create an air gap (10) between the interior of the housing (9). 9) and the housing of the supply unit (8), said plate (31) of said radiator (3) having vent holes (37) so as to allow the circulation of said air gap (10) by natural convection.
6. Dispositif selon la revendication 5, dans lequel ledit radiateur est dit premier radiateur (3), le groupe d'alimentation (8) comprenant un deuxième radiateur (11), distinct dudit premier radiateur (3), ledit deuxième radiateur (11) étant constitué par un élément monobloc (110) pourvu d'ailettes (111), notamment prévues dans le prolongement des ailettes (32) dudit premier radiateur (3).  6. Device according to claim 5, wherein said radiator is said first radiator (3), the power unit (8) comprising a second radiator (11), distinct from said first radiator (3), said second radiator (11) being constituted by a monobloc element (110) provided with fins (111), in particular provided in the extension of the fins (32) of said first radiator (3).
7. Dispositif selon l'une des revendications 1 à 6, présentant une optique disposée au droit desdites diodes électroluminescentes (2) et dans lequel la face de la plaque (31) du dissipateur (3) en contact avec la face de transmission de chaleur présente un épaulement (13) dimensionné pour la réception de l'optique (12).  7. Device according to one of claims 1 to 6, having an optics arranged in line with said light-emitting diodes (2) and wherein the face of the plate (31) of the dissipator (3) in contact with the heat-transmitting face has a shoulder (13) sized for receiving the optics (12).
8. Dispositif selon la revendication 7, dans lequel l'optique (12) est maintenue dans l'épaulement (13) par l'intermédiaire d'une bague (14) amovible, un joint à cils (15) permettant l'écoulement de l'eau de pluie sur la surface de l'optique (12).  8. Device according to claim 7, wherein the optic (12) is held in the shoulder (13) by means of a ring (14) removable, an eyelash seal (15) allowing the flow of rain water on the surface of the optics (12).
9. Dispositif selon l'une des revendications 1 à 8, dans lequel la face d'éclairage (6) du corps de base (4) supportant lesdites diodes électroluminescentes (2) comprend une partie médiane (16) et, de part et d'autre, deux parties latérales (17, 18) en saillie, ladite partie médiane (16) supportant des diodes électroluminescentes de couleur bleue noyées dans un gel phosphoré (19) reçu dans la cavité formée entre lesdites deux parties latérales (17, 18), les parties latérales recevant d'autres diodes électroluminescentes.  9. Device according to one of claims 1 to 8, wherein the illumination face (6) of the base body (4) supporting said light emitting diodes (2) comprises a middle portion (16) and, on the other hand, another, two projecting side portions (17, 18), said middle portion (16) supporting blue-colored light-emitting diodes embedded in a phosphor gel (19) received in the cavity formed between said two side portions (17, 18) , the lateral parts receiving other light-emitting diodes.
10. Dispositif selon l'une des revendications 1 à 9, dans lequel le corps de base (4) est dans un métal à base de cuivre et ledit élément monobloc (30) du dissipateur (3) en aluminium, un revêtement à base d'argent, d'épaisseur inférieure à 100 microns, facilitant le transfert de chaleur entre le corps de base (4) et ledit élément monobloc (30).  10. Device according to one of claims 1 to 9, wherein the base body (4) is in a copper-based metal and said monobloc element (30) of the dissipator (3) aluminum, a coating based on silver, less than 100 microns thick, facilitating the transfer of heat between the base body (4) and said monobloc element (30).
11. Dispositif selon l'une des revendications 1 à 10, dans lequel la longueur des ailettes (32) selon ladite direction sensiblement perpendiculaire à la plaque (31) est supérieure au tiers de la plus petite dimension du corps de base (4), selon une direction parallèle à ladite plaque (31). 11. Device according to one of claims 1 to 10, wherein the length of the fins (32) in said direction substantially perpendicular to the plate (31) is greater than one-third of the smallest dimension of the base body (4), according to one direction parallel to said plate (31).
12. Lampadaire équipé d'un dispositif d'éclairage selon l'une des revendications 1 à 11, ladite face d'éclairage étant dirigée vers le bas.  12. Floor lamp equipped with a lighting device according to one of claims 1 to 11, said lighting face being directed downwards.
EP12790597.4A 2011-10-20 2012-10-18 Illuminating device comprising light-emitting diodes Not-in-force EP2769145B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1159532A FR2981731B1 (en) 2011-10-20 2011-10-20 LIGHT EMITTING DEVICE LIGHTING DEVICE
PCT/FR2012/052375 WO2013057433A1 (en) 2011-10-20 2012-10-18 Illuminating device comprising light-emitting diodes

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EP2769145A1 true EP2769145A1 (en) 2014-08-27
EP2769145B1 EP2769145B1 (en) 2016-12-14

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NL1040746B1 (en) * 2014-03-28 2016-01-18 Rubitech Luctron B V LED lighting fixture and the method for manufacturing it.
EP3290790B1 (en) * 2016-08-30 2019-04-10 ZG Lighting Benelux Heatsink
WO2022008737A1 (en) * 2020-07-09 2022-01-13 Schreder S.A. Modular luminaire head and gear module for a luminaire head
NL2026193B1 (en) * 2020-07-09 2022-03-15 Schreder Sa Modular luminaire head and gear module for a luminaire head

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KR100916113B1 (en) 2008-06-26 2009-09-08 화우테크놀러지 주식회사 Led lighting fitting for street-lamp
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WO2013057433A1 (en) 2013-04-25
FR2981731B1 (en) 2016-03-25
FR2981731A1 (en) 2013-04-26

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