WO2010076435A1 - Lighting system with electroluminescent diodes - Google Patents

Lighting system with electroluminescent diodes Download PDF

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Publication number
WO2010076435A1
WO2010076435A1 PCT/FR2009/001488 FR2009001488W WO2010076435A1 WO 2010076435 A1 WO2010076435 A1 WO 2010076435A1 FR 2009001488 W FR2009001488 W FR 2009001488W WO 2010076435 A1 WO2010076435 A1 WO 2010076435A1
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WO
WIPO (PCT)
Prior art keywords
lighting system
radiator
led
leds
lighting
Prior art date
Application number
PCT/FR2009/001488
Other languages
French (fr)
Inventor
Hervé FINAN
Dominique Navarro
Michel Ben Sadoun
Original Assignee
Finan Trading Company
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 Finan Trading Company filed Critical Finan Trading Company
Publication of WO2010076435A1 publication Critical patent/WO2010076435A1/en

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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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/08—Lighting devices intended for fixed installation with a standard
    • F21S8/085—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light
    • F21S8/086—Lighting devices intended for fixed installation with a standard of high-built type, e.g. street light with lighting device attached sideways of the standard, e.g. for roads and highways
    • 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
    • F21V29/56—Cooling arrangements using liquid coolants
    • F21V29/58—Cooling arrangements using liquid coolants characterised by the coolants
    • 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
    • F21V29/56—Cooling arrangements using liquid coolants
    • F21V29/59—Cooling arrangements using liquid coolants with forced flow of the coolant
    • 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
    • F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
    • F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
    • 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
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • F21W2111/06—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for aircraft runways or the like
    • 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
    • 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/64—Heat extraction or cooling elements
    • H01L33/648—Heat extraction or cooling elements the elements comprising fluids, e.g. heat-pipes

Definitions

  • the present invention relates to light-emitting diode (LED, or LED) lighting systems, and in particular to high power lighting systems using LED matrix assemblies.
  • the invention particularly relates to lighting devices comprising such assemblies of LEDs and integrating means for evacuation, heat and advantageously recovery of the heat emitted by the LEDs.
  • Luminaires using LED matrix assemblies are known.
  • the major problems that have arisen with these devices are the difficulty to achieve lighting as close as possible to white light or sunlight, the too small diameter of the illuminating area, especially for high-bay luminaires. , and warming of the LEDs and their power circuits, as well as their support, with consequent loss of radiated power and reduced service life.
  • LEDs are a very popular alternative to conventional lighting, including incandescent lamps, but also to fluorescent lamps and especially to discharge lamps.
  • LED arrays to extend the spectrum of the emitted light and to better distribute it on the illuminated surface (see WO 2007/032619, EP 0 921 568, US 5,191,174). It has also been proposed to dissipate the heat emitted by LEDs (see US Pat. No. 7,331,691, WO 2006/123911, WO 2006/099741, WO 02/097884, US 4,729,076 and DE G 93 16 106.9).
  • the lighting power and the reliability of these luminaires are, however, limited on the one hand by the overall power actually emitted by this matrix assembly and, on the other hand, by the need to evacuate the heat emitted by each of the LEDs.
  • Currently known systems are thus limited in their power of illumination, so that they can not be used for example in applications in which the emitted light by the device must be tapping and must provide a beam of illumination as homogeneous as possible and as wide as possible.
  • the lighting module is constituted by a set of matrix LEDs, preferably placed and / or glued in unit cells directly arranged in the support matrix;
  • the spectrum and the lighting power of the LEDs are optimized by the use of white-light LEDs, advantageously by mixing LEDs emitting in different colors, or preferably by conversion to phosphorus, especially blue phosphor and / or yellow phosphor , an LED emitting in the blue (see US Patent 7,267,787); • the cooling of the LEDs and / or their support is provided by an original device; and
  • the cooling device further comprises means for collecting and recovering the heat thus removed from the lighting system.
  • the skilled person thus achieves the realization of customized lighting systems, such as high-bay luminaires, especially for highways, hypermarkets and their vicinity, airports, etc. , which have previously unknown advantages, and in the alternative that provide an exceptional return on investment, particularly in allowing to valorize the heat a priori harmful, emitted by the lighting modules.
  • An object of the invention is thus to provide a powerful and reliable lighting system, using at least one LED matrix to replace conventional bulbs, including incandescent, fluorescent or discharge.
  • Another object of the invention is to provide a powerful lighting system using LED arrays having a high power of distribution, while ensuring the cooling of the system and, optionally, the recovery of the heat thus collected.
  • LED light-emitting diode
  • the LEDs are arranged in a matrix, preferably square or rectangular, but also circular, oval or any other shape, directly on a support machined to define on one of the main faces, cavities intended to receive each at least an LED and whose spacings are advantageously such that frequent interference is avoided or substantially avoided in this type of assembly, while said support is itself made of metal, such as for example copper;
  • the LEDs are fixed on the bottom and / or the wall of the said cavities in places adjusted to be able to optionally orient the beam of the concerned LED, while the geometry of the cavity can be adapted to provide the beam of the concerned LED a greater or lesser concentration, as needed;
  • Said machined metal support itself acts as a cooling element or radiator, said radiator constituting a cooling system of passive or active type with coolant circulation;
  • the system is equipped with means of heat evacuation, in particular of the radiator type, themselves coupled with means forming a collector with fluid passage and / or, optionally, with means of cooling with phase change, advantageously in close thermal relationship with said radiator; and
  • the cooling module may comprise a thermosiphon, in addition to or instead of the micropump-radiator assembly.
  • the LED lighting system according to the invention is arranged to constitute a bulb substitutable for incandescent or fluorescent bulbs, and especially conventional discharge lamps.
  • the cooling system advantageously comprises, optionally, a micropump connected on the one hand to the rear face of the LED support, against which said micropump or any equivalent device, active or passive, is able to circulate a suitable heat transfer fluid, and secondly to a radiator for the evacuation of the heat thus collected.
  • Said micropump-radiator or said thermosiphon assembly can be integrated at the rear of the support or platen supporting the LEDs, or alternatively it can be placed on or in the vicinity of the mast of a lamp with at least one lighting system.
  • LED according to the invention preferably in a vertical position ascending or assimilated.
  • the LED lighting system thus comprises an LED support provided with cavities intended to receive each at least one LED, while the bottom of said cavities is provided, on the inner face on which the LEDs are fixed, a reflective coating, including metal Ag, with protection against oxidation, and / or Ni / Cr.
  • the unitary cavity in which one or more LEDs are introduced into selected positions according to the invention provides in effect an original means for avoiding or attenuating interference phenomena between adjacent LEDs, to allow orientation with respect to each other, if desired, and / or to concentrate / disperse the beams of several LEDs close, with the effect of an optimal distribution of the overall beam, with less shadow effects and / or over-lighting in the overlapping areas of the individual beams, and with optimal management of the radiated light power.
  • the invention also relates to complete lighting devices comprising such LED assemblies and incorporating means for heat dissipation and advantageously for recovering the heat emitted by the LEDs, as well as a support structure, such as a mast.
  • the system according to the invention as described above makes it possible to achieve on all occasions lighting meeting the criteria of quality and reliability required, while providing savings at the various levels mentioned above.
  • Fig. 1 represents a perspective view of an outdoor lamp post pole head, provided with a reflector incorporating an LED matrix, itself connected to an external radiator.
  • Fig. 2a is a partial schematic cross sectional view of an LED wafer, showing three LEDs fixed in respective cavities machined according to asymmetric profiles.
  • Fig. 2b illustrates the contours of the three lighting zones obtained in a plane perpendicular to the mean plane of the LEDs, and about 6 m away from them.
  • Fig. 3a illustrates, in perspective, a device constituting a radiator of the heat transfer fluid type, in the open position.
  • Fig. 3b shows the same system on the active side of which is directly applied and fixed a LED plate., Whose illuminating face is directed outwards.
  • Fig. 4 is a diagrammatic representation in elevation of a set of LED modules connected to an external radiator.
  • Fig. 5 is a diagram illustrating the integration of a heat recovery system collected on an LED module in a domestic or industrial heating circuit.
  • Fig. 6 illustrates in side view and partial longitudinal section a plate of an LED module combined with a pump. and provided at one end with a base for its integration in a screw socket, in particular E27 or E40, a luminaire.
  • the invention aims at a high power LED lighting system, in particular but not exclusively for a vertical or substantially vertical mast luminaire.
  • the mast 1 of a straight street lamp comprises a head 2 in which can be housed a matrix of LED 3 or the plate provided with a cap E40 or E27 ( Figure 6).
  • the rear face thereof is connected by a pipe or pipe, flexible and / or rigid, to a heat evaporator having the configuration of a radiator 4.
  • the LED module consists of a square or rectangular matrix of a large number of LEDs arranged in a conventional manner for LEDs "chip".
  • this LED module may further comprise a cover optics and / or a collimator, and at least a portion of the LEDs are integrated into recesses machined in the support module.
  • the assembly is naturally complemented by wiring, connections and connections, as well as insulators, and optionally at least a phosphorus salt and a resin, traditional for this type of product.
  • the arrangement of the LEDs 5 in the cavities 6 may be asymmetrical.
  • Such a system can give (see Fig. 2b) illumination along zones 7, 7 ', 7 "in partial overlap on a surface perpendicular to the mean plane of the LED module and at a distance from it.
  • the LED module may also include an optical covering device, comprising a plastic element (especially PMMA) forming collimator, designed to absorb at best only about 9% of the light, while said collimator is essentially to reduce glare and / or control the angle of diffusion of lighting.
  • the cavities 6 may, if desired, be coated by means of a suitable reflective surface treatment (for example for depositing Cr, Ag, etc.).
  • a suitable reflective surface treatment for example for depositing Cr, Ag, etc.
  • the cavities of the LED support in which at least a portion of the LEDs constituting the module are placed are suitably machined to have a symmetrical or asymmetrical transverse profile, so as to thereby provide a respectively symmetrical or asymmetric illumination beam , depending on what you want.
  • only a portion of said cavities may optionally have such an asymmetric cross section.
  • the support 8 comprising at least one die 9 of cavities lined with LEDs can be applied directly to the active face 10, of metal such as for example copper, of a conventional heat sink device 11, also called a system cooler, active type (fluid circulation such as: air, water, oil, etc.), or advantageously passive.
  • the collector system (Cu, Al, etc.) captures by its outer face most of the heat generated by the LED module 9 in operation. According to the variant embodiment shown in FIG.
  • the collecting device 11 is advantageously coupled to at least one radiator 13, by means of one or more suitable flexible or rigid conduits.
  • Such a system with collector and radiator allows a very precise control of the temperatures and an excellent control of the functioning of the LED modules connected to it. It can then operate in the range of ambient or low temperatures. However, such heat transfer has a positive impact on the illumination of the LEDs and on the lifetime of the latter.
  • the LED modules with at least one transfer / heat collection system operating by thermosiphon or phase change, which then allows operation at temperatures below zero, if desired in particular applications.
  • the device as shown in FIG. 4 opens out, not on a radiator 13, but on a thermal energy recovery system, including the conventional heat pump type 14. Such a system can thus feed a residential heating circuit, or industrial premises or offices, instead of allowing the heat collected to disperse into the environment,
  • an LED lighting module 15 constituting a bulb 16 with a base 17, and provided on its rear face with a radiator 18 radiating in a micropump 19 to discharge or a thermosiphon by circulation of water or a another cooling fluid, or in fluid communication with a larger external radiator, advantageously located on or around the upper end of the pole of the lamp concerned.
  • the bulb 16 has a screw base, or even a rotating base to allow to screw the base 17 on the supply bushing without rotating the bulb and / or the luminaire head, which can thus maintain their preferred orientation relative to the chosen plane, in practice a substantially horizontal plane, for optimized lighting.
  • the power supply and / or the electronics of the system according to the invention are reported in the lower part of the lamppost, that is to say in practice at ground level or at man's height, in order to facilitate the interventions, including control, adjustment and troubleshooting;
  • the system uses phosphorus (according to a technique known to those skilled in the art and preferably as described in US Pat. No.
  • the heat dissipation of the LED module can be effected by thermosiphon, without pump;
  • the geometry of the reflector of the luminaire is such that the evacuation of the heat received by it, for example under the effect of sunshine, is facilitated;
  • the reflector of the luminaire is configured to release passive ventilation on its underside, between the latter and the LED module, in order to optimize the evacuation of the heat emitted by the LEDs as well as that resulting from the heating of the reflector of the luminaire due to sunshine;
  • the heat collector means may be in close thermal relationship with at least one fan, preferably fixed to a tall lamp structure, particularly for public, industrial and / or storage buildings;
  • the LED matrix comprises a set of approximately 30 to 400 LEDs according to the desired power, advantageously around 100 LEDs, arranged in a substantially rectangular matrix comprising 3-20 lines and 10-20 columns;
  • the LED lighting system according to the invention can be applied to the production of high-rise and / or high-power luminaires operating at voltages that can be practically 12-24 volts to 240 volts, and providing a luminous flux of approximately 10,000-19,000 lumens, ie more than 100 Im / W.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

The invention relates to a high-power lighting system that uses at least one LED matrix (3) in which the LEDs are arranged into a matrix directly on a substrate machined so as to comprise, on one of the main surfaces thereof, cavities, each of which receiving at least one LED, the substrate proper serving as a cooling element or radiator. The system advantageously includes heat-discharging means and preferably heat-recovering means. The invention can be used for tall lampposts.

Description

SYSTÈME D'ÉCLAIRAGE À DIODES ÉLECTROLUMINESCENTES LIGHT EMITTING DIODE LIGHTING SYSTEM
DOMAINE DE L'INVENTION La présente invention concerne les systèmes d'éclairage à diodes électroluminescentes (LED, ou DEL), et en particulier les systèmes d'éclairage de forte puissance utilisant des assemblages en matrices de LED. L'invention concerne tout spécialement des dispositifs d'éclairage comportant de tels assemblages de LED et intégrant des moyens d'évacuation, de la chaleur et avantageusement de récupération de la chaleur émise par les LED.FIELD OF THE INVENTION The present invention relates to light-emitting diode (LED, or LED) lighting systems, and in particular to high power lighting systems using LED matrix assemblies. The invention particularly relates to lighting devices comprising such assemblies of LEDs and integrating means for evacuation, heat and advantageously recovery of the heat emitted by the LEDs.
ARRIÈRE-PLAN TECHNOLOGIQUETECHNOLOGICAL BACKGROUND
On connaît des luminaires utilisant des ensembles matriciels de LED. Les problèmes majeurs qui se sont présentés avec ces appareils sont la difficulté à réaliser un éclairage le plus proche possible de la lumière blanche ou de la lumière solaire, le diamètre trop faible de la zone d'éclairement, en particulier pour des luminaires de grande hauteur, et réchauffement des LED et de leurs circuits d'alimentation, ainsi que de leur support, avec pour corollaire une perte de puissance rayonnée et une durée de vie réduite.Luminaires using LED matrix assemblies are known. The major problems that have arisen with these devices are the difficulty to achieve lighting as close as possible to white light or sunlight, the too small diameter of the illuminating area, especially for high-bay luminaires. , and warming of the LEDs and their power circuits, as well as their support, with consequent loss of radiated power and reduced service life.
Il est connu que les LED sont une alternative très recherchée aux éclairages classiques, notamment aux lampes à incandescence, mais également aux lampes à fluorescence et surtout aux lampes à décharge.It is known that LEDs are a very popular alternative to conventional lighting, including incandescent lamps, but also to fluorescent lamps and especially to discharge lamps.
Dans ce contexte, il a déjà été proposé pour des dispositifs d'éclairage de proximité, des matrices de LED visant à étendre le spectre de la lumière émise et à mieux répartir celle-ci sur la surface éclairée (voir WO 2007/032619, EP 0 921 568, US 5.119.174). Il a également été proposé de dissiper la chaleur émise par les LED (voir US 7.331.691, WO 2006/ 123911, WO 2006/099741, WO 02/097884, US 4.729.076, et DE G 93 16 106.9). La puissance d'éclairement et la fiabilité de ces luminaires sont cependant limitées d'une part par la puissance globale réellement émise par cet ensemble matriciel et d'autre part par la nécessité d'évacuer la chaleur émise par chacune des LED. Les systèmes actuellement connus sont ainsi limités dans leur puissance d'éclairement, si bien qu'ils ne peuvent pas être utilisés par exemple dans des applications dans lesquelles l'éclairage émis par le dispositif doit être puisant et doit procurer un faisceau d'éclairage le plus homogène possible et le plus large possible.In this context, it has already been proposed for proximity lighting devices, LED arrays to extend the spectrum of the emitted light and to better distribute it on the illuminated surface (see WO 2007/032619, EP 0 921 568, US 5,191,174). It has also been proposed to dissipate the heat emitted by LEDs (see US Pat. No. 7,331,691, WO 2006/123911, WO 2006/099741, WO 02/097884, US 4,729,076 and DE G 93 16 106.9). The lighting power and the reliability of these luminaires are, however, limited on the one hand by the overall power actually emitted by this matrix assembly and, on the other hand, by the need to evacuate the heat emitted by each of the LEDs. Currently known systems are thus limited in their power of illumination, so that they can not be used for example in applications in which the emitted light by the device must be tapping and must provide a beam of illumination as homogeneous as possible and as wide as possible.
Or, on recherche de nos jours à remplacer également les luminaires classiques de forte puissance par des luminaires à LED, pour faire face à un double défi, constitué par le besoin d'économies d'énergie et de la réduction des coûts de maintenance. Les LED doivent alors procurer un éclairage le plus homogène et le plus large possible, tandis que les lampadaires équipés doivent pouvoir être de grande hauteur, en particulier pour des éclairages publics, tels que des éclairages d'autoroutes, d'aires de repos d'autoroutes, d'aéroports, de stades, de terrains de sports, etc., tandis que les ensembles deHowever, today we seek to replace conventional high power luminaires with LED luminaires, to face a double challenge, consisting of the need for energy savings and the reduction of maintenance costs. The LEDs must then provide the most uniform and widest possible illumination, while the street lamps equipped must be able to be of great height, in particular for public lighting, such as highway lights, rest areas, etc. highways, airports, stadiums, sports fields, etc., while
LED utilisés doivent avoir la plus longue durée de vie possible.LEDs used must have the longest possible life.
RÉSUMÉ DE L'INVENTIONSUMMARY OF THE INVENTION
On a maintenant trouvé que ces objectifs, ainsi que d'autres, peuvent être atteints avec des systèmes d'éclairage selon l'invention dans lesquels, séparément ou en combinaison:It has now been found that these and other objectives can be achieved with lighting systems according to the invention in which, separately or in combination:
• le module d'éclairage est constitué par un ensemble de LED en matrice, de préférence placées et/ ou collées dans des alvéoles unitaires directement agencées dans la matrice-support; • le spectre et la puissance d'éclairage des LED sont optimisés par le recours à des LED à lumière blanche, avantageusement par mélange de LED émettant dans des couleurs différentes, ou de préférence par conversion au phosphore, notamment au phosphore bleu et/ ou jaune, d'une LED émettant dans le bleu (voir brevet US 7.267.787); • le refroidissement des LED et/ ou de leur support est assuré par un dispositif original; etThe lighting module is constituted by a set of matrix LEDs, preferably placed and / or glued in unit cells directly arranged in the support matrix; The spectrum and the lighting power of the LEDs are optimized by the use of white-light LEDs, advantageously by mixing LEDs emitting in different colors, or preferably by conversion to phosphorus, especially blue phosphor and / or yellow phosphor , an LED emitting in the blue (see US Patent 7,267,787); • the cooling of the LEDs and / or their support is provided by an original device; and
• dans une forme de réalisation avantageuse, le dispositif de refroidissement comporte en outre des moyens pour la collecte et la récupération de la chaleur ainsi évacuée du système d'éclairage. En ajustant à convenance ces divers paramètres, l'homme du métier parvient ainsi à la réalisation de systèmes d'éclairage personnalisés, comme par exemple des luminaires de grande hauteur, notamment pour les autoroutes, les hypermarchés et leurs abords, les aéroports, etc., qui présentent des avantages inconnus jusqu'alors, et subsidiairement qui procurent un retour exceptionnel sur investissement, notamment en permettant de valoriser la chaleur a priori nuisible, émise par les modules d'éclairage.In an advantageous embodiment, the cooling device further comprises means for collecting and recovering the heat thus removed from the lighting system. By suitably adjusting these various parameters, the skilled person thus achieves the realization of customized lighting systems, such as high-bay luminaires, especially for highways, hypermarkets and their vicinity, airports, etc. , which have previously unknown advantages, and in the alternative that provide an exceptional return on investment, particularly in allowing to valorize the heat a priori harmful, emitted by the lighting modules.
Un objectif de l'invention est ainsi de procurer un système d'éclairage puissant et fiable, utilisant au moins une matrice de LED en remplacement des ampoules classiques, notamment à incandescence, à fluorescence ou à décharge.An object of the invention is thus to provide a powerful and reliable lighting system, using at least one LED matrix to replace conventional bulbs, including incandescent, fluorescent or discharge.
Un autre objectif de l'invention est de proposer un système d'éclairage puissant utilisant des matrices de LED ayant un fort pouvoir d'édairement, tout en assurant le refroidissement du système et, en option, la récupération de la chaleur ainsi recueillie.Another object of the invention is to provide a powerful lighting system using LED arrays having a high power of distribution, while ensuring the cooling of the system and, optionally, the recovery of the heat thus collected.
Ces objectifs sont atteints au moyen d'un système d'éclairage à diodes électroluminescentes (LED) dans lequel, isolément ou en combinaison:These objectives are achieved by means of a light-emitting diode (LED) lighting system in which, alone or in combination:
• les LED sont agencées selon une matrice, de préférence carrée ou rectangulaire, mais également circulaire, ovale ou de toute autre forme, directement sur un support usiné pour y définir sur l'une des faces principales, des cavités destinées à recevoir chacune au moins une LED et dont les espacements sont avantageusement tels que soient évitées ou substantiellement évitées les interférences fréquentes dans ce type d'assemblage, tandis que ledit support est lui-même en métal, tel que par exemple du cuivre;The LEDs are arranged in a matrix, preferably square or rectangular, but also circular, oval or any other shape, directly on a support machined to define on one of the main faces, cavities intended to receive each at least an LED and whose spacings are advantageously such that frequent interference is avoided or substantially avoided in this type of assembly, while said support is itself made of metal, such as for example copper;
• les LED sont fixées sur le fond et/ ou la paroi des dites cavités en des endroits ajustés pour pouvoir en option orienter le faisceau de la LED concernée, tandis que la géométrie de la cavité peut être adaptée pour procurer au faisceau de la LED concernée une concentration plus ou moins grande, selon les besoins;• the LEDs are fixed on the bottom and / or the wall of the said cavities in places adjusted to be able to optionally orient the beam of the concerned LED, while the geometry of the cavity can be adapted to provide the beam of the concerned LED a greater or lesser concentration, as needed;
• ledit support métallique usiné fait lui-même office d'élément de refroidissement ou radiateur, ledit radiateur constituant un système de refroidissement de type passif ou actif à circulation de fluide caloporteur;Said machined metal support itself acts as a cooling element or radiator, said radiator constituting a cooling system of passive or active type with coolant circulation;
• le système est équipé de moyens d'évacuation de la chaleur, notamment de type radiateur, eux-mêmes couplés avec des moyens formant collecteur à passage de fluide et/ ou, en option, avec des moyens de refroidissement à changement de phase, avantageusement en relation thermique étroite avec ledit radiateur; etThe system is equipped with means of heat evacuation, in particular of the radiator type, themselves coupled with means forming a collector with fluid passage and / or, optionally, with means of cooling with phase change, advantageously in close thermal relationship with said radiator; and
• en option, un dispositif de type pompe à chaleur pour la récupération de tout ou partie des calories émises par ledit système d'éclairage. En variante, le module de refroidissement peut comporter un thermosiphon, en sus ou à la place de l'ensemble micropompe-radiateur.• optionally, a heat pump type device for recovering all or part of the calories emitted by said lighting system. Alternatively, the cooling module may comprise a thermosiphon, in addition to or instead of the micropump-radiator assembly.
Dans une forme de réalisation préférée, le système d'éclairage à LED selon l'invention est agencé pour constituer une ampoule substituable aux ampoules à incandescence ou à fluorescence, et surtout aux lampes à décharge classiques. Dans cette forme de réalisation, le système de refroidissement comporte avantageusement, en option, une micropompe reliée d'une part à la face arrière du support des LED, contre laquelle ladite micropompe ou tout dispositif équivalent, actif ou passif, est apte à faire circuler un fluide caloporteur approprié, et d'autre part à un radiateur pour l'évacuation de la chaleur ainsi recueillie.In a preferred embodiment, the LED lighting system according to the invention is arranged to constitute a bulb substitutable for incandescent or fluorescent bulbs, and especially conventional discharge lamps. In this embodiment, the cooling system advantageously comprises, optionally, a micropump connected on the one hand to the rear face of the LED support, against which said micropump or any equivalent device, active or passive, is able to circulate a suitable heat transfer fluid, and secondly to a radiator for the evacuation of the heat thus collected.
Ledit ensemble micropompe-radiateur ou ledit thermosiphon peut être intégré à l'arrière du support ou platine supportant les LED, ou en variante il peut être placé sur ou au voisinage du mat d'un lampadaire doté d'au moins un système d'éclairage à LED selon l'invention, de préférence dans une position verticale ascendante ou assimilée.Said micropump-radiator or said thermosiphon assembly can be integrated at the rear of the support or platen supporting the LEDs, or alternatively it can be placed on or in the vicinity of the mast of a lamp with at least one lighting system. LED according to the invention, preferably in a vertical position ascending or assimilated.
Sous un aspect, le système d'éclairage à LED selon l'invention comporte ainsi un support de LED pourvu de cavités destinées à recevoir chacune au moins une LED, tandis que le fond des dites cavités est pourvu, sur la face intérieure sur laquelle les LED sont fixées, d'un revêtement réfléchissant, notamment en Ag métal, doté d'une protection contre l'oxydation, et/ ou en Ni /Cr.In one aspect, the LED lighting system according to the invention thus comprises an LED support provided with cavities intended to receive each at least one LED, while the bottom of said cavities is provided, on the inner face on which the LEDs are fixed, a reflective coating, including metal Ag, with protection against oxidation, and / or Ni / Cr.
Dans la pratique, l'homme du métier adapte alors la dimension et la forme des cavités aux besoins auxquels il est confronté. Cela permet d'obtenir un système d'éclairage à LED approprié à un cas ponctuel, ou encore d'obtenir une panoplie de systèmes d'éclairage à LED dans laquelle on peut choisir, au cas par cas, un système parfaitement approprié, notamment par la géométrie de son faisceau, la puissance rayonnée, avantageusement avec concentration, de manière à procurer un système d'éclairage convenant pour des éclairages de grande hauteur.In practice, the skilled person then adapts the size and shape of the cavities to the needs he is confronted with. This makes it possible to obtain an LED lighting system suitable for a specific case, or to obtain a variety of LED lighting systems in which one can choose, on a case-by-case basis, a perfectly appropriate system, in particular by the geometry of its beam, the radiated power, advantageously with concentration, so as to provide a lighting system suitable for high lighting.
La cavité unitaire dans laquelle une ou plusieurs LED sont introduites dans des positions choisies selon l'invention procure en effet un moyen original pour éviter ou atténuer les phénomènes d'interférences entre LED voisines, pour permettre d'orienter les uns par rapport aux autres, si on le souhaite, et/ ou de concentrer/ disperser les faisceaux de plusieurs LED proches, avec pour effet une distribution optimale du faisceau d'ensemble, avec moins d'effets d'ombre et/ ou de suréclairement dans les zones de recouvrement des faisceaux individuels, et avec une gestion optimale de la puissance lumineuse rayonnée. L'invention concerne également des dispositifs complets d'éclairage comportant de tels assemblages de LED et intégrant des moyens d'évacuation de la chaleur et avantageusement de récupération de la chaleur émise par les LED, ainsi qu'une ossature support, telle qu'un mât.The unitary cavity in which one or more LEDs are introduced into selected positions according to the invention provides in effect an original means for avoiding or attenuating interference phenomena between adjacent LEDs, to allow orientation with respect to each other, if desired, and / or to concentrate / disperse the beams of several LEDs close, with the effect of an optimal distribution of the overall beam, with less shadow effects and / or over-lighting in the overlapping areas of the individual beams, and with optimal management of the radiated light power. The invention also relates to complete lighting devices comprising such LED assemblies and incorporating means for heat dissipation and advantageously for recovering the heat emitted by the LEDs, as well as a support structure, such as a mast.
Le système selon l'invention tel que décrit plus haut permet de réaliser en toutes occasions un éclairage répondant aux critères de qualité et de fiabilité requis, tout en procurant des économies aux différents niveaux évoqués plus haut.The system according to the invention as described above makes it possible to achieve on all occasions lighting meeting the criteria of quality and reliability required, while providing savings at the various levels mentioned above.
D'autres objets de l'invention apparaîtront à la lecture de la description qui suit et des dessins annexés, où les formes de réalisation décrites sont fournies uniquement à des fins illustratives, et ne limitent en aucune manière la portée de l'invention.Other objects of the invention will become apparent on reading the following description and the accompanying drawings, in which the embodiments described are provided solely for illustrative purposes, and in no way limit the scope of the invention.
BRÈVE DESCRIPTION DES DESSINSBRIEF DESCRIPTION OF THE DRAWINGS
L'invention sera mieux comprise en référence aux planches de dessin annexées, dans lesquelles:The invention will be better understood with reference to the appended drawing plates, in which:
Fig. 1 représente une vue en perspective d'une tête de mât de lampadaire d'extérieur, munie d'un réflecteur intégrant une matrice de LED, elle-même reliée à un radiateur extérieur.Fig. 1 represents a perspective view of an outdoor lamp post pole head, provided with a reflector incorporating an LED matrix, itself connected to an external radiator.
Fig. 2a représente une vue en coupe transversale schématique partielle d'une plaquette de LED, montrant trois LED fixées dans des cavités respectives usinées selon des profils asymétriques. Fig. 2b illustre les contours des trois zones d'éclairage obtenues dans un plan perpendiculaire au plan moyen des LED, et éloigné d'environ 6 m de celles-ci.Fig. 2a is a partial schematic cross sectional view of an LED wafer, showing three LEDs fixed in respective cavities machined according to asymmetric profiles. Fig. 2b illustrates the contours of the three lighting zones obtained in a plane perpendicular to the mean plane of the LEDs, and about 6 m away from them.
Fig. 3a illustre, en perspective, un dispositif constituant un radiateur du type à fluide caloporteur, en position ouverte. Fig. 3b montre le même système sur la face active duquel est directement appliquée et fixée une plaquette de LED., dont la face éclairante est dirigée vers l'extérieur.Fig. 3a illustrates, in perspective, a device constituting a radiator of the heat transfer fluid type, in the open position. Fig. 3b shows the same system on the active side of which is directly applied and fixed a LED plate., Whose illuminating face is directed outwards.
Fig. 4 est une représentation schématique en élévation d'un ensemble de modules de LED reliés à un radiateur extérieur. Fig. 5 est un schéma illustrant l'intégration d'un système de récupération de la chaleur recueillie sur un module de LED dans un circuit de chauffage domestique ou industriel.Fig. 4 is a diagrammatic representation in elevation of a set of LED modules connected to an external radiator. Fig. 5 is a diagram illustrating the integration of a heat recovery system collected on an LED module in a domestic or industrial heating circuit.
Fig. 6 illustre en vue de côté et coupe longitudinale partielle une platine d'un module de LED combinée avec une pompe. et munie à une extrémité d'un culot pour son intégration dans une douille à vis, notamment E27 ou E40, d'un luminaire.Fig. 6 illustrates in side view and partial longitudinal section a plate of an LED module combined with a pump. and provided at one end with a base for its integration in a screw socket, in particular E27 or E40, a luminaire.
DESCRIPTION DÉTAILLÉE DE L'INVENTION L'invention vise un système d'éclairage à LED de forte puissance, notamment mais non exclusivement pour luminaire à mât vertical ou sensiblement vertical.DETAILED DESCRIPTION OF THE INVENTION The invention aims at a high power LED lighting system, in particular but not exclusively for a vertical or substantially vertical mast luminaire.
Pour simplifier, l'invention est décrite ci-après en référence à un tel mât, mais sans que cela soit limitatif. L'homme du métier est apte, sur la base de ses connaissances et des présentes indications, à transposer les indications fournies ici à d'autres applications mettant en oeuvre des matrices de LED.For simplicity, the invention is described below with reference to such a mast, but without this being limiting. The skilled person is able, on the basis of his knowledge and the present indications, to transpose the indications provided here to other applications using LED matrices.
Comme le montre la Fig. 1, le mât 1 d'un lampadaire droit comporte une tête 2 dans laquelle peut être logée une matrice de LED 3 ou la platine munie d'un culot E40 ou E27 (Fig. 6). La face arrière de celle-ci est raccordée par une conduite ou tuyau, souple et/ ou rigide, à un évaporateur de chaleur ayant la configuration d'un radiateur 4.As shown in FIG. 1, the mast 1 of a straight street lamp comprises a head 2 in which can be housed a matrix of LED 3 or the plate provided with a cap E40 or E27 (Figure 6). The rear face thereof is connected by a pipe or pipe, flexible and / or rigid, to a heat evaporator having the configuration of a radiator 4.
Avantageusement, le module de LED est constitué d'une matrice carrée ou rectangulaire d'un grand nombre de LED agencées de manière classique pour les LED en "chip". Selon une variante avantageuse, ce module de LED peut en outre comporter une optique de couverture et/ ou un collimateur, et au moins une partie des LED sont intégrées dans des cavités usinées dans le module support. L'ensemble est naturellement complété par les câblages, les connexions et les raccordements, ainsi que les isolants, et en option au moins un sel de phosphore et une résine, traditionnels pour ce type de produit.Advantageously, the LED module consists of a square or rectangular matrix of a large number of LEDs arranged in a conventional manner for LEDs "chip". According to an advantageous variant, this LED module may further comprise a cover optics and / or a collimator, and at least a portion of the LEDs are integrated into recesses machined in the support module. The assembly is naturally complemented by wiring, connections and connections, as well as insulators, and optionally at least a phosphorus salt and a resin, traditional for this type of product.
Comme le montre la Fig. 2a, la disposition des LED 5 dans les cavités 6 peut être dissymétrique. Un tel système peut donner (voir Fig. 2b) un éclairement selon des zones 7, 7', 7" en recouvrement partiel sur une surface perpendiculaire au plan moyen du module de LED et à une certaine distance de celui-ci. Sous un autre aspect, le module de LED peut également comporter un dispositif optique de recouvrement, comportant un élément en matière plastique (notamment en PMMA) formant collimateur, conçu pour n'absorber au mieux que 9% environ de la lumière, tandis que ledit collimateur vise essentiellement à réduire l'éblouissement et/ ou à contrôler l'angle de diffusion de l'éclairage.As shown in FIG. 2a, the arrangement of the LEDs 5 in the cavities 6 may be asymmetrical. Such a system can give (see Fig. 2b) illumination along zones 7, 7 ', 7 "in partial overlap on a surface perpendicular to the mean plane of the LED module and at a distance from it. In another aspect, the LED module may also include an optical covering device, comprising a plastic element (especially PMMA) forming collimator, designed to absorb at best only about 9% of the light, while said collimator is essentially to reduce glare and / or control the angle of diffusion of lighting.
La totalité ou une partie des cavités 6 peuvent, si on le souhaite, être revêtues au moyen d'un traitement de surface réfléchissant approprié (par exemple pour un dépôt de Cr, Ag, etc.). Dans la forme de réalisation représentée sur la Fig. 2a, les cavités du support pour LED dans lesquelles sont placées au moins une partie des LED constituant le module considéré sont usinées de manière adéquate pour avoir un profil transversal symétrique ou asymétrique, de manière à procurer ainsi un faisceau d'éclairement respectivement symétrique ou asymétrique, selon ce que l'on souhaite. En pratique, une partie seulement des dites cavités peut avoir, en option, un tel profil transversal asymétrique. Ainsi, le simple échange d'un module de LED par un autre ayant une configuration différente permet de modifier très facilement et à moindres frais les caractéristiques d'éclairement d'un lampadaire, dont les éléments constitutifs et les autres éléments fonctionnels peuvent alors rester inchangés, ce qui constitue un avantage économique indéniable.All or part of the cavities 6 may, if desired, be coated by means of a suitable reflective surface treatment (for example for depositing Cr, Ag, etc.). In the embodiment shown in FIG. 2a, the cavities of the LED support in which at least a portion of the LEDs constituting the module are placed are suitably machined to have a symmetrical or asymmetrical transverse profile, so as to thereby provide a respectively symmetrical or asymmetric illumination beam , depending on what you want. In practice, only a portion of said cavities may optionally have such an asymmetric cross section. Thus, the simple exchange of one LED module by another having a different configuration makes it possible to very easily and cheaply modify the lighting characteristics of a lamp, whose constituent elements and the other functional elements can then remain unchanged. which is an undeniable economic advantage.
Comme l'illustrent les Figs. 3a et 3b, le support 8 comportant au moins une matrice 9 de cavités garnies de LED peut être appliqué directement sur la face active 10, en métal tel que par exemple du cuivre, d'un dispositif collecteur de chaleur classique 11, encore dénommé système refroidisseur, de type actif (à circulation de fluide tel que: air, eau, huile, etc), ou avantageusement passif. Le système collecteur (Cu, Al, etc.) capte par sa face externe la majeure partie de la chaleur générée par le module de LED 9 en fonctionnement. Conformément à la variante de mise en oeuvre représentée sur la Fig.As illustrated in Figs. 3a and 3b, the support 8 comprising at least one die 9 of cavities lined with LEDs can be applied directly to the active face 10, of metal such as for example copper, of a conventional heat sink device 11, also called a system cooler, active type (fluid circulation such as: air, water, oil, etc.), or advantageously passive. The collector system (Cu, Al, etc.) captures by its outer face most of the heat generated by the LED module 9 in operation. According to the variant embodiment shown in FIG.
4, le dispositif collecteur 11 est avantageusement couplé à au moins un radiateur 13, au moyen d'une ou plusieurs conduites souples ou rigides appropriées.4, the collecting device 11 is advantageously coupled to at least one radiator 13, by means of one or more suitable flexible or rigid conduits.
Un tel système avec collecteur et radiateur permet un contrôle très précis des températures et une excellente maîtrise du fonctionnement des modules de LED qui y sont raccordés. On peut alors opérer dans la gamme des températures ambiantes ou basses. Or, un tel transfert thermique a un impact positif sur l'éclairement des LED et sur la durée de vie de celles-ci.Such a system with collector and radiator allows a very precise control of the temperatures and an excellent control of the functioning of the LED modules connected to it. It can then operate in the range of ambient or low temperatures. However, such heat transfer has a positive impact on the illumination of the LEDs and on the lifetime of the latter.
En variante, en particulier pour les applications à un éclairage de haute puissance, on peut également envisager de munir les modules de LED d'au moins un système de transfert /collecte de chaleur opérant par thermosiphon ou changement de phase, qui permet alors un fonctionnement à des températures inférieures à zéro, si on le souhaite dans des applications particulières. Si l'on se réfère maintenant à la variante de mise en oeuvre représentée sur la Fig. 5, le dispositif tel que représenté sur la Fig. 4 débouche, non pas sur un radiateur 13, mais sur un système de récupération d'énergie thermique, notamment du type pompe à chaleur classique 14. Un tel système peut ainsi alimenter un circuit de chauffage d'habitation, ou de locaux industriels ou de bureaux, au lieu de laisser la chaleur recueillie se disperser dans l'environnement,Alternatively, particularly for applications with high power lighting, it is also conceivable to provide the LED modules with at least one transfer / heat collection system operating by thermosiphon or phase change, which then allows operation at temperatures below zero, if desired in particular applications. Referring now to the alternative embodiment shown in FIG. 5, the device as shown in FIG. 4 opens out, not on a radiator 13, but on a thermal energy recovery system, including the conventional heat pump type 14. Such a system can thus feed a residential heating circuit, or industrial premises or offices, instead of allowing the heat collected to disperse into the environment,
Dans la variante du système d'éclairage par LED selon l'invention illustrée sur la Fig. 6, on procure un module d'éclairage à LED 15 constituant une ampoule 16 avec culot 17, et muni sur sa face arrière d'un radiateur 18 rayonnant dans une micropompe 19 à évacuation ou un thermosiphon par circulation d'eau ou d'un autre fluide de refroidissement, ou en communication fluidique avec un radiateur extérieur de plus grandes dimensions, avantageusement implanté sur ou aux alentours de l'extrémité supérieure du mât du lampadaire concerné. Pour faciliter la fixation et le remplacement d'une telle ampoule avec matrice de LED dans ladite tête de luminaire, il est avantageux que l'ampoule 16 comporte un culot à vis, ou même un culot tournant pour permettre de visser le culot 17 sur la douille d'alimentation sans faire tourner l'ampoule et/ ou la tête de luminaire, qui peuvent ainsi conserver leur orientation privilégiée par rapport au plan choisi, en pratique un plan sensiblement horizontal, en vue d'un éclairage optimisé.In the variant of the LED lighting system according to the invention illustrated in FIG. 6, there is provided an LED lighting module 15 constituting a bulb 16 with a base 17, and provided on its rear face with a radiator 18 radiating in a micropump 19 to discharge or a thermosiphon by circulation of water or a another cooling fluid, or in fluid communication with a larger external radiator, advantageously located on or around the upper end of the pole of the lamp concerned. To facilitate the attachment and replacement of such an LED matrix bulb in said luminaire head, it is advantageous that the bulb 16 has a screw base, or even a rotating base to allow to screw the base 17 on the supply bushing without rotating the bulb and / or the luminaire head, which can thus maintain their preferred orientation relative to the chosen plane, in practice a substantially horizontal plane, for optimized lighting.
Dans des formes de mise en œuvre avantageuses des différents aspects de l'invention tels que décrits ci-dessus, l'une ou l'autre des dispositions /modalités suivantes peut être utilisée, séparément ou en combinaison: l'alimentation et/ ou l'électronique du système selon l'invention sont reportées dans la partie basse du lampadaire, c'est-à-dire en pratique au niveau du sol ou à hauteur d'homme, afin de faciliter les interventions, notamment de contrôle, de réglage et de dépannage éventuels; le système utilise du phosphore (selon une technique connue de l'homme du métier et de préférence telle que décrite dans le brevet US 7.267.787), mais intégré, en pratique sous forme de phosphore sur base silicate et/ ou aluminate, dans le collimateur et/ ou sur la face interne de celui-ci ; l'évacuation de chaleur du module de LED peut s'effectuer par thermosiphon, sans pompe; la géométrie du réflecteur du luminaire est telle que l'évacuation de la chaleur reçue par celui-ci, par exemple sous l'effet de l'ensoleillement, soit facilitée; le réflecteur du luminaire est configuré de manière à libérer une ventilation passive sur sa face inférieure, entre celle-ci et le module de LED, afin d'optimiser l'évacuation de la chaleur émise par les LED ainsi que de celle résultant de réchauffement du réflecteur du luminaire du fait de l'ensoleillement; les moyens formant collecteur de chaleur peuvent être en relation thermique étroite avec au moins un ventilateur, de préférence fixé sur une structure formant lampadaire de grande hauteur, notamment pour bâtiments publics, industriels et/ ou de stockage; - la matrice de LED comporte un ensemble d'environ 30 à 400 LED selon la puissance désirée, avantageusement d'environ 100 LED, agencées en une matrice sensiblement rectangulaire comportant 3-20 lignes et 10-20 colonnes; le support des LED comporte les câblages et connexions requis, avantageusement sous forme de circuits imprimés, hybrides ou nanométriques.In advantageous embodiments of the various aspects of the invention as described above, one or other of the following provisions / terms may be used, separately or in combination: the power supply and / or the electronics of the system according to the invention are reported in the lower part of the lamppost, that is to say in practice at ground level or at man's height, in order to facilitate the interventions, including control, adjustment and troubleshooting; the system uses phosphorus (according to a technique known to those skilled in the art and preferably as described in US Pat. No. 7,267,787), but integrated, in practice in the form of phosphorus on a silicate base and / or aluminate, in the collimator and / or on the inner face thereof; the heat dissipation of the LED module can be effected by thermosiphon, without pump; the geometry of the reflector of the luminaire is such that the evacuation of the heat received by it, for example under the effect of sunshine, is facilitated; the reflector of the luminaire is configured to release passive ventilation on its underside, between the latter and the LED module, in order to optimize the evacuation of the heat emitted by the LEDs as well as that resulting from the heating of the reflector of the luminaire due to sunshine; the heat collector means may be in close thermal relationship with at least one fan, preferably fixed to a tall lamp structure, particularly for public, industrial and / or storage buildings; the LED matrix comprises a set of approximately 30 to 400 LEDs according to the desired power, advantageously around 100 LEDs, arranged in a substantially rectangular matrix comprising 3-20 lines and 10-20 columns; the support of the LEDs comprises the wiring and connections required, advantageously in the form of printed circuit boards, hybrid or nanometric.
L'homme du métier comprendra aisément que la mise en oeuvre de la présente invention procure des avantages indéniables et des progrès significatifs par rapport aux techniques actuellement connues et pratiquées. Ainsi, il est possible de réaliser des économies substantielles et de simplifier les modalités d'intervention sur site avec la technique selon l'invention.Those skilled in the art will readily understand that the practice of the present invention provides undeniable advantages and significant progress over currently known and practiced techniques. Thus, it is possible to achieve substantial savings and simplify the on-site intervention procedures with the technique according to the invention.
En particulier, le système d'éclairage à LED selon l'invention peut être appliqué à la réalisation de luminaires de grande hauteur et/ ou de forte puissance, opérant sous des tensions pouvant aller en pratique de 12-24 volts à 240 volts, et procurant un flux lumineux d'environ 10.000-19.000 lumens, soit plus de 100 Im/ W. In particular, the LED lighting system according to the invention can be applied to the production of high-rise and / or high-power luminaires operating at voltages that can be practically 12-24 volts to 240 volts, and providing a luminous flux of approximately 10,000-19,000 lumens, ie more than 100 Im / W.

Claims

REVENDICATIONS
1. Système d'éclairage de forte puissance utilisant au moins une matrice de LED, caractérisé en ce que les LED (5) sont agencées en matrice directement sur un support (8) usiné pour comporter, sur l'une des faces principales de celui-ci, des cavités (6) destinées à recevoir chacune au moins une LED (5), tandis que la disposition des LED (5) dans deux cavités (6) voisines est dissymétrique, et/ ou au moins une partie des dites cavités présente un profil transversal asymétrique, et tandis que ledit support fait lui-même office d'élément de refroidissement ou radiateur (13).1. High power lighting system using at least one LED matrix, characterized in that the LEDs (5) are arranged in a matrix directly on a support (8) machined to comprise, on one of the main faces of the cavities (6) intended to each receive at least one LED (5), while the arrangement of the LEDs (5) in two adjacent cavities (6) is asymmetrical, and / or at least a part of said cavities present an asymmetric transverse profile, and while said support itself serves as a cooling element or radiator (13).
2. Système d'éclairage selon la revendication 1, caractérisé en ce qu'il comporte un collimateur dans lequel et/ ou sur la face interne duquel est intégré du phosphore.2. Lighting system according to claim 1, characterized in that it comprises a collimator in which and / or on the inner face of which is integrated phosphorus.
3. Système d'éclairage selon la revendication 1, caractérisé en ce que ledit radiateur constitue un système de refroidissement de type passif ou actif à circulation de fluide caloporteur.3. Lighting system according to claim 1, characterized in that said radiator constitutes a cooling system of passive or active type circulating heat transfer fluid.
4. Système d'éclairage selon la revendication 1, caractérisé en ce que ledit radiateur est couplé avec des moyens formant collecteur de chaleur à passage de fluide et/ ou, en option, avec des moyens de refroidissement à changement de phase.4. Lighting system according to claim 1, characterized in that said radiator is coupled with fluid passage heat collector means and / or, optionally, with phase change cooling means.
5. Système d'éclairage selon la revendication 4, caractérisé en ce que les moyens formant collecteur de chaleur sont en relation thermique étroite avec ledit radiateur.5. Lighting system according to claim 4, characterized in that the heat collector means are in close thermal relationship with said radiator.
6. Système d'éclairage selon la revendication 5, caractérisé en ce qu'il comporte en outre un dispositif de type pompe à chaleur.6. Lighting system according to claim 5, characterized in that it further comprises a heat pump type device.
7. Système d'éclairage selon l'une des revendications 5 ou 6, caractérisé en ce qu'il comporte en outre un thermosiphon. 7. Lighting system according to one of claims 5 or 6, characterized in that it further comprises a thermosiphon.
8. Système d'éclairage selon la revendication 1, caractérisé en ce qu'il est agencé en une ampoule avec culot (16) intégrant au moins une matrice de LED (3), ladite ampoule comprenant un système de refroidissement comportant un thermosiphon, relié à un radiateur.8. Lighting system according to claim 1, characterized in that it is arranged in a bulb with base (16) incorporating at least one LED matrix (3), said bulb comprising a cooling system comprising a thermosiphon, connected to a radiator.
9. Système d'éclairage selon la revendication 1, caractérisé en ce qu'il est agencé en une ampoule avec culot (16) intégrant au moins une matrice de LED (3), ladite ampoule comprenant un système de refroidissement comportant une micropompe, reliée à un radiateur.9. Lighting system according to claim 1, characterized in that it is arranged in a bulb with base (16) incorporating at least one LED matrix (3), said bulb comprising a cooling system comprising a micropump, connected to a radiator.
10. Système d'éclairage selon l'une quelconque des revendications 1 à 9, caractérisé en ce qu'il est combiné avec un mât de lampadaire (1), de préférence un mât de lampadaire de grande hauteur.10. Lighting system according to any one of claims 1 to 9, characterized in that it is combined with a pole lamp post (1), preferably a mast of high street lamp.
11. Système d'éclairage selon la revendication 10, caractérisé en ce que l'ensemble micropompe-radiateur et/ ou le thermosiphon est fixé sur le mât du dit lampadaire.11. Lighting system according to claim 10, characterized in that the micropump-radiator assembly and / or the thermosiphon is fixed on the mast of said lamp post.
12. Système d'éclairage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que les moyens formant collecteur de chaleur sont en relation thermique étroite avec au moins un ventilateur, de préférence fixé sur une structure formant lampadaire de grande hauteur, notamment pour bâtiments publics, industriels et/ ou de stockage. 12. Lighting system according to any one of claims 1 to 4, characterized in that the heat collector means are in close thermal relationship with at least one fan, preferably fixed on a structure forming a high street lamp, especially for public, industrial and / or storage buildings.
PCT/FR2009/001488 2008-12-31 2009-12-31 Lighting system with electroluminescent diodes WO2010076435A1 (en)

Applications Claiming Priority (2)

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FR0807511A FR2940679B1 (en) 2008-12-31 2008-12-31 ELECTROLUMINESCENT DIODE LIGHTING SYSTEM.
FR0807511 2008-12-31

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