EP1821030B1 - Unité d'éclairage à DEL - Google Patents

Unité d'éclairage à DEL Download PDF

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Publication number
EP1821030B1
EP1821030B1 EP07002908A EP07002908A EP1821030B1 EP 1821030 B1 EP1821030 B1 EP 1821030B1 EP 07002908 A EP07002908 A EP 07002908A EP 07002908 A EP07002908 A EP 07002908A EP 1821030 B1 EP1821030 B1 EP 1821030B1
Authority
EP
European Patent Office
Prior art keywords
led
light unit
unit
polymer material
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.)
Not-in-force
Application number
EP07002908A
Other languages
German (de)
English (en)
Other versions
EP1821030A1 (fr
Inventor
Antonio Zancan
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.)
Idealedit Srl
Original Assignee
Idealedit Srl
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 Idealedit Srl filed Critical Idealedit Srl
Publication of EP1821030A1 publication Critical patent/EP1821030A1/fr
Application granted granted Critical
Publication of EP1821030B1 publication Critical patent/EP1821030B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/06—Controlling the distribution of the light emitted by adjustment of elements by movement of refractors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/02—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages with provision for adjustment
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/14—Adjustable mountings
    • F21V21/30—Pivoted housings or frames
    • 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
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
    • 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
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-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
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/87—Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
    • 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
    • F21V31/00—Gas-tight or water-tight arrangements
    • 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
    • F21V21/00—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips
    • F21V21/005—Supporting, suspending, or attaching arrangements for lighting devices; Hand grips for several lighting devices in an end-to-end arrangement, i.e. light tracks
    • 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
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention finds application in the field of both indoor and outdoor artificial lighting and particularly relates to a highly watertight light emitting module.
  • LEDs are known in the art, which use as a light source one or more light emitting diodes, commonly known as LEDs.
  • a LED is an electronic module adapted to generate electromagnetic radiations of various wavelengths, and particularly also in the visible light spectrum.
  • the European Patent publication EP1443567A2 disclosed a light emitting module comprising all the features as defined in the preamble of claim 1.
  • this prior art module comprises a support structure for one or more LED sources embedded in a protection and cover element, made of a polymer material which is mounted to the metal structure by screw or snap fit means, with a gasket interposed therebetween. Light sources are powered by electric means.
  • a well-known drawback of this prior art solution is that the metal structure does not ensure optimal dissipation of the heat generated by LED sources.
  • the screw or snap fit does not ensure watertightness, thereby involving the risk that both power supply connections and LEDs may be irremediably damaged.
  • US-A-5632551 discloses all the features of the preamble of the present claim 1.
  • the object of this invention is to overcome the above drawbacks, by providing a light unit that is highly efficient and relatively coat-effective.
  • a particular object is to provide a light unit that allows dissipation of large amounts of heat.
  • Yet another object is to provide a highly watertight light unit, which can be used underwater with no risk of liquid ingress.
  • the unit of the invention allows dissipation of large amounts of heat, while ensuring watertightness.
  • the housing element By making the housing element from polymer material, any oxidation problems will be avoided.
  • the invention relates to a LED lighting apparatus as defined in claim 16.
  • the lighting unit of the invention generally designated by numeral 1, will be particularly but not exclusively suitable for residential or industrial lighting.
  • FIGS. 1 and 2 it comprises a housing element 2 for three LED sources 4, preferably mounted on a support element 3.
  • the support element 3 may also be omitted, and the LEDs, with the electric contacts associated thereto, may also be directly embedded in the housing element 2.
  • the latter may be made from an electrically insulating material.
  • the support element 3 typically a metal plate, may have sockets for connection to the LEDs 4, which are typically microsoldered thereto, and tracks for series or parallel connection therebetween.
  • the LED sources may be provided in any number, without departure from the scope of the attached claims. These will preferably be of the high power type, for assuring optimal lighting.
  • a cover element 5, mounted over the LEDs 4, will be further provided.
  • the housing element 2 is made of a first thermally conductive polymer material, which may consist of a base plastic material with particles of highly thermally conductive materials, preferably but without limitation metal particles, dispersed therein.
  • This base plastic material may be selected from the group comprising polypropylene, polyamide, polysulfone or an elastomer, preferably EPDM.
  • the LEDs 4 and the cover element 5 are integrally associated to the housing element 2. Therefore, the LEDs are embedded in the cover element 5 and/or the housing element 2, to form a unitary, watertight unit 1, specially suitable for underwater use. Likewise, if the LEDs lie on the support element 3, the latter will be wholly embedded in the cover element 5 and/or the housing element 2. It will be understood that the LEDs 4 may be covered by a lens, itself embedded in the cover element 5, which is designed to change the optical path of the light beam emitted therefrom, without departure from the scope as defined by the annexed claims. This will avoid any lens fouling problem.
  • the cover element 5 is made of a second optically transparent polymer material, preferably a silicone resin, a polyamide, a polycarbonate or PMMA, which is chemically compatible with the first polymer material that forms the housing element 2.
  • the second material is chemically bonded to the first material, thereby providing a substantially watertight coupling, which makes the light unit of the invention specially suitable for underwater use.
  • the housing element 2 may comprise a substantially flat main body 6 having a seat 7 for the support element 3 with the LEDs 4 associated thereto and a plurality of outwardly extending heat-dissipating fins 8, as clearly shown in FIG. 3 .
  • the fins 8 shall be appropriately sized and configured according to the power of the LEDs used, hence of the heat to be dissipated, especially when high power LEDs are used.
  • the cover element 5 may be housed within the whole seat 7 to cover and incorporate the support 3 and the LEDs 4, as shown in FIG. 1
  • the light unit of the invention may comprise power supply means 9 for powering the LEDs 4, to be connected to a normal power supply mains.
  • the power supply means 9 may have wiping contacts 10, as shown in FIGS. 1 and 2 , known as IP55, for domestic use, or bayonet locking contacts, as shown in FIG. 3 , known as IP68, for underwater use. It shall be understood that any other type of power supply means may be used without departure from the scope of the annexed claims.
  • the power supply means 9 may include voltage transformer means, not shown but well known per se, which are incorporated in the housing element 2.
  • the invention relates to a LED lighting apparatus, comprising a support plate 12 for the unit 1 and for a sheet 13 which in turn supports three lenses 14 coincident with the LEDs 4 for changing the shape and the optical path of the light beam emitted therefrom.
  • the apparatus may have modular interconnection means 15 for coupling two or more units 1.
  • the means 15 are a pair of complementary U-shaped plates 16, 16', which are adapted to connect two plates 12, 12' for supporting two units 1, 1' with their respective sheets 13, 13' and lenses 14 and 14'.
  • the units that form the assembly may be provided in any number, and that such units may be assembled in any configuration without departure from the scope as defined in the annexed claims.
  • a single plate 12 may be even provided, for supporting a plurality of units 1, one next to or above the other.
  • the lenses 14 are associated to the unit 1 through suitable adjustment means 17.
  • the adjustment means 17 may comprise pivot means 18 adapted to selectively change the tilt angle ⁇ of the lenses 14 relative to the plate 12.
  • the pivot means 18 include a pair of pins 19 insertable in corresponding elongated holes 20 of the plate 12 for pivoting the unit 1, as well as the plate 13 and the lenses 14 to which it is rigidly connected, about the axis X, in the direction of arrows F 1 and F 2 .
  • the adjustment means 17 may further comprise spacer means 21 for selectively adjusting the distance d of the lenses 14 from the unit 1.
  • the spacer means 21 may comprise a pair of teeth 22, 22' formed on the unit 1, insertable in a pair of locknuts 23, 23' formed on elongate extensions 24, 24' of the sheet 13, for radial displacement of the lenses 14 relative to the unit 1, in the direction of arrow F 3 and adjust the relative distance from d' to d".
  • the light beam emitted from the LEDs may be conformed and modeled as desired.
  • the plate 12 may be made of a plastic material and be subjected to a suitable conductive treatment next to the electric contacts 9 of the unit, e.g. by providing a nickel-plated surface portion, so that no exposed wire is required.
  • a mains voltage transformer may be further embedded in the plate 12.
  • the unit and apparatus of the invention fulfill the intended objects and particularly meet the requirement of allowing dissipation of large amounts of heat, while ensuring safe watertightness.
  • the housing element 2 By forming the housing element 2 from a thermally conductive polymer material, the large amounts of heat generated by the LEDs may be effectively dissipated, and any deformation and/or mechanical failure of the whole unit may be avoided.

Claims (17)

  1. Unité à LED, comprenant :
    au moins une LED (4),
    - un élément formant logement (2) ayant un corps principal (6) présentant un siège (7) pour le logement de ladite au moins une LED (4) ;
    - un élément formant couvercle (5) monté au-dessus de ladite au moins une LED (4),
    ledit corps principal (6) étant constitué d'un premier matériau polymère conducteur de la chaleur,
    caractérisée en ce que ladite au moins une LED (4) et ledit élément formant couvercle (5) sont associés d'un seul tenant audit élément formant logement (2) afin de former une Unité lumineuse monobloc, étanche à l'eau,
    et en ce que ledit élément formant couvercle (5) est constitué d'un deuxième matériau polymère optiquement transparent, ledit premier matériau polymère étant chimiquement compatible avec ledit deuxième matériau polymère et ledit premier matériau polymère étant chimiquement lié audit deuxième matériau polymère, réalisant ainsi un couplage essentiellement étanche à l'eau.
  2. Unité lumineuse selon la revendication 1, caractérisée en ce que ledit premier matériau polymère conducteur de la chaleur est un isolant électrique.
  3. Unité lumineuse selon la revendication 1, caractérisée en ce que ledit deuxième matériau polymère est choisi dans le groupe comprenant les résines de silicone, les polyamides, le polycarbonate, le PMMA.
  4. Unité lumineuse selon la revendication 1, caractérisée en ce que ledit premier matériau polymère conducteur de la chaleur comprend un matériau plastique de base dans lequel sont dispersées des particules de matériaux hautement conducteurs de la chaleur.
  5. Unité lumineuse selon la revendication 4, caractérisée en ce que ledit matériau plastique de base est sélectionné dans le groupe comprenant le polypropylène, le polyamide, la polysulfone, les élastomères.
  6. Unité lumineuse selon la revendication 4 ou 5, caractérisée en ce que lesdites particules hautement conductrices de la chaleur sont des matériaux métalliques.
  7. Unité lumineuse selon la revendication 1, caractérisée en ce qu'elle comprend un élément de support (3) pour ladite au moins une LED (4).
  8. Unité lumineuse selon la revendication 1, caractérisée en ce que ledit corps principal (6) est essentiellement plan et a une pluralité d'ailettes de dissipation de la chaleur (8), s'étendant vers l'extérieur à partir dudit corps principal (6).
  9. Unité lumineuse selon la revendication 1, caractérisée en ce que ledit élément formant couvercle (5) est logé dans la globalité de ladite cavité (7) de façon à recouvrir et à incorporer ladite au moins une LED (4).
  10. Unité lumineuse selon la revendication 1, caractérisée en ce qu'elle comprend des moyens d'alimentation électrique (9) pour alimenter ladite au moins une LED (4), destinés à être connectés à un réseau d'alimentation électrique externe.
  11. Unité lumineuse selon la revendication 10, caractérisée en ce que lesdits moyens d'alimentation électrique (9) comprennent des moyens transformateurs de tension incorporés dans ledit élément formant logement (2).
  12. Unité lumineuse selon la revendication 11, caractérisée en ce que ladite au moins une LED et les contacts électriques qui y sont associés sont directement intégrés dans ledit élément formant logement (2).
  13. Appareil d'éclairage à LED comprenant au moins une platine de support (12) pour au moins une source lumineuse conçue pour émettre un faisceau lumineux, et au moins une lentille (14) associée à ladite source lumineuse, qui est conçue pour changer la conformation et le trajet optique dudit faisceau, caractérisé en ce que ladite source lumineuse comprend au moins une source à LED (I) telle que revendiquée dans une ou plusieurs des revendications précédentes.
  14. Appareil selon la revendication 13, caractérisé en ce que ladite au moins une lentille (14) est associée à ladite unité à LED (1) par l'intermédiaire de moyens de réglage (17) appropriés.
  15. Appareil selon la revendication 13, caractérisé en ce que lesdits moyens de réglage (17) comprennent des moyens formant pivot (18) adaptés pour changer sélectivement l'angle d'inclinaison (α) de ladite au moins une lentille (14) par rapport à ladite platine (12).
  16. Appareil selon la revendication 13, caractérisé en ce que lesdits moyens de réglage (17) comprennent des moyens d'écartement (21) pour l'ajustement sélectif de la distance entre ladite au moins une lentille (14) et ladite unité à LED (1).
  17. Appareil selon la revendication 13, caractérisé en ce que ladite au moins une lentille (14) comprend une pluralité de lentilles associées à chacune des LED (4) de ladite unité à LED (1).
EP07002908A 2006-02-15 2007-02-12 Unité d'éclairage à DEL Not-in-force EP1821030B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SM200600005A SM200600005A (it) 2006-02-15 2006-02-15 Unita' luminosa led ad alta potenza, nonche' apparato di illuminazione comprendente tale unita'

Publications (2)

Publication Number Publication Date
EP1821030A1 EP1821030A1 (fr) 2007-08-22
EP1821030B1 true EP1821030B1 (fr) 2012-04-18

Family

ID=37969816

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07002908A Not-in-force EP1821030B1 (fr) 2006-02-15 2007-02-12 Unité d'éclairage à DEL

Country Status (4)

Country Link
EP (1) EP1821030B1 (fr)
AT (1) ATE554335T1 (fr)
ES (1) ES2386153T3 (fr)
SM (1) SM200600005A (fr)

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Also Published As

Publication number Publication date
EP1821030A1 (fr) 2007-08-22
ES2386153T3 (es) 2012-08-10
ATE554335T1 (de) 2012-05-15
SM200600005B (it) 2007-08-22
SM200600005A (it) 2007-08-22

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