EP2260232B1 - Structure de support pour dispositifs d'éclairage à del - Google Patents

Structure de support pour dispositifs d'éclairage à del Download PDF

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Publication number
EP2260232B1
EP2260232B1 EP09721050.4A EP09721050A EP2260232B1 EP 2260232 B1 EP2260232 B1 EP 2260232B1 EP 09721050 A EP09721050 A EP 09721050A EP 2260232 B1 EP2260232 B1 EP 2260232B1
Authority
EP
European Patent Office
Prior art keywords
rod
led
support surface
support
plate
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.)
Active
Application number
EP09721050.4A
Other languages
German (de)
English (en)
Other versions
EP2260232A2 (fr
Inventor
Enzo Catellani
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.)
Individual
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Individual
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Publication date
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Publication of EP2260232A2 publication Critical patent/EP2260232A2/fr
Application granted granted Critical
Publication of EP2260232B1 publication Critical patent/EP2260232B1/fr
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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
    • 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
    • F21V29/85—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
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a LED lighting device of the type described in the preamble of Claim 1.
  • LEDs (acronym for light emitting diode) recently used to light various spaces, such as: domestic spaces, offices, open spaces such as squares and gardens and the like.
  • LED lighting devices have various advantages with respect to more conventional lighting devices, such as incandescent lamps and fluorescent lamps.
  • LEDs have a very small volume, even less than one cm 3 , very high efficiency, produce a light that can obtain a desired colour, switch on very quickly when energized by electrical current and so forth.
  • LED lighting devices also have some considerable drawbacks.
  • LED lighting devices can become very hot due to their small volume.
  • This heating can cause rapid deterioration of the chip associated with this LED and thus deterioration of the LED, which decreases in efficiency and other features.
  • the technical aim of the present invention is to devise a LED lighting device capable of substantially overcoming the aforesaid drawbacks.
  • an important object of the invention is to achieve a support structure for LED lighting devices which allows optimum heat dissipation.
  • Another important object of the invention is to produce a simple and inexpensive LED lighting device.
  • the support structure according to the invention is indicated as a whole with the number 1.
  • It comprises a rod 2 and support means 3 , suitable to support at least one LED 4 .
  • LEDs 4 can also be provided for a single rod 2.
  • the rod 2 is circular and hollow and has an outer surface with a normal section preferably substantially circular. It is made a metal material with high thermal conductivity, such as in particular: copper, aluminium, silver, gold or their alloys and more preferably copper alloy nickel plated on the surface.
  • a metal material with high thermal conductivity such as in particular: copper, aluminium, silver, gold or their alloys and more preferably copper alloy nickel plated on the surface.
  • the rod 2 then comprises an internal hollow 2a also circular and conveniently coaxial with the outer surface ( Fig. 3 ).
  • the hollow rod 2 also preferably has an external diameter of between 2 mm and 6 mm, and preferably between 2 mm and 4 mm, and a diameter of the internal hollow 2a preferably of between 1 mm and 3 mm. Moreover, it conveniently has a length exceeding 5 cm and more preferably exceeding 10 cm and a maximum length variable to even more than 2 m.
  • the support means 3 is also at least partly integral and in one piece with the rod 2.
  • It comprises support surface 3a , suitable to support, preferably through interposing of a further element better defined below, at least one LED 4 and preferably only one LED 4.
  • the support surface 3a is realized by a flattened portion of the rod 2.
  • it can be at least partly produced by partial flattening of the rod 2. In this way any discontinuity of the material, which would realize a thermal resistance, is avoided.
  • a flattening along only one portion of the rod 2 is preferred.
  • This flattening therefore defines a substantially flat support surface 3 which, in the normal section ( Fig. 4 ), essentially realizes a chord of the circumference defined by the outer surface of the rod 2.
  • said flattening will achieve a reduction of section, visible in Fig. 2 , preferably of between 10% and 50%.
  • the support structure 3a preferably has a base with a width close to the diameter of the rod 2 and conveniently of between 2 mm and 6 mm, and a length preferably of between 1 cm and 5 cm and more preferably between 2 cm and 3 cm.
  • an opening 3b is provided in proximity of an end of the support surface 3a, to place the inner hollow 2a of the rod 2 in communication with the outer surface. It is conveniently substantially circular with a diameter close to the diameter of the rod 2.
  • the support means 3 is preferably not produced at an end 2b of the rod 2, but at a distance of over 5 mm from this end 2b, as shown in Fig. 1 .
  • the end 2b of the rod 2, close to the support means 3, therefore conveniently has an annular circular and open shape and, conveniently, also the end 2c further from the support means 3 has an annular circular and open shape so as to allow the passage of air inside the hollow 2a.
  • the support means 3 also comprises a plate 8 made of a material with high thermal conductivity, as specified above and more in particular of aluminium alloy.
  • the plate 8 is fixed directly to the support surface 3a and preferably has base dimensions similar to those of this support surface 3a, or between 3 and 5 mm and between 2 and 3 cm, and a height preferably between 0.5 and 2 mm.
  • elements such as conductive pastes and the like can be present between plate 8 and support surface 3a or alternatively a conductive weld or double-sided adhesive tape could be provided.
  • the plate 8 is therefore conveniently the portion of the support means 3 suitable to support the LED 4.
  • the LED 4 is realized by a printed circuit 4a and a bulb, or primary lens, 4b .
  • the printed circuit 4a is conveniently substantially rectangular and has base dimensions of between 1 mm and 5 mm.
  • the bulb 4b is made of polymer or silicone material or glass and preferably has an external diameter of between 0.3 mm and 3 mm and more preferably between 1.5 mm and 2 mm. Moreover, it has a substantially semi-spherical shape.
  • the LED 4 has a power of between 0.1 W and 50 W and more preferably between 0.5 W and 30 W.
  • the LED 4 is also connected to an electrical power source through electrical connections 5 suitable to supply power to this LED 4.
  • It comprises at least one conductor wire 6 , and preferably two, covered with a sheath, or braid, 7 made of polymer material and preferably polyester, or alternatively, not covered.
  • the conductor wires 6 are disposed at least partly inside the rod 2 and, in proximity of the opening 3b, have no sheath 7.
  • clamping elements 9 are present, one for each wire 6, disposed on the plate 8 and realized by welds suitable to support and clamp these wires 6.
  • the clamping elements 9 also connect the wires 6 of at least one connection element 10 .
  • connection elements 10 are connected directly to the LED 4 and preferably realized by two electrical connections in conductive material realized by two flat elements, as shown in Fig. 1 .
  • the support structure 1 according to the invention achieves important advantages.
  • this structure 1 allows optimum heat dispersion through the rod 2, which allows the LED 4 always to be maintained at optimum temperatures so as to prevent deterioration or overheating thereof.
  • the heat is dispersed in particular by the hollow and annular shape of the rod 2 and by the material with high thermal conductivity.
  • the heat is diffused on both sides of the rod 2, due to the fact that the support means 3 are positioned at one end of the rod 2.
  • the structure of the rod 2 allows air to circulate inside the hollow 2a, as the ends 2b and 2c are not closed, and the creation of convective move.
  • the structure of the rod 2 allows air to circulate inside the hollow 2a, as the ends 2b and 2c are not closed, and the creation of convective movements which allow superior cooling of the LED 2.
  • the structure 1 is easily deformable in an axial direction and therefore allows the rod 2 to be shaped as required.

Landscapes

  • 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)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Claims (9)

  1. Dispositif d'éclairage à DEL comprenant une DEL (4) et une structure de support (1)
    - ladite DEL (4) étant réalisée au moyen d'un circuit imprimé (4a) et d'une lentille primaire (4b)
    - ladite structure de support (1) comprenant une tige (2)
    - ladite tige (2) ayant une forme creuse et annulaire, une extrémité (2b) et des moyens de support (3) ayant une surface de support (3a) intégrale, formant une seule pièce avec la tige (2) et supportant ladite DEL (4)
    - ladite surface de support étant réalisée par une partie aplatie de ladite tige (2), ladite tige (2) étant en matériau métallique à haute conductivité thermique et ayant
    - un diamètre extérieur compris entre 2 mm et 6 mm,
    - un diamètre intérieur compris entre 1 mm et 3 mm,
    - une longueur supérieure à 10 cm,
    et caractérisée en ce que
    ladite surface de support (3a) est placée à une distance supérieure à 5 mm de ladite extrémité (2b), lesdits moyens de support (3) comprenant en outre une plaque fixée directement sur ladite surface de support (3a) et supportant ladite DEL (4), ladite plaque (8) ayant des dimensions de base similaires à celles de la surface de support (3a) et étant en matériau métallique à haute conductivité thermique, sélectionné de préférence parmi cuivre, aluminium, argent, or ou autres alliages.
  2. Dispositif selon la revendication 1, dans lequel ledit matériau métallique est réalisé en alliage de cuivre plaqué au nickel.
  3. Dispositif selon une ou plusieurs des revendications précédentes, dans lequel ladite tige (2) comprend des extrémités ouvertes.
  4. Dispositif selon une ou plusieurs des revendications précédentes, dans lequel ladite plaque (8) est fixée à ladite surface de support (3a) au moyen de liens mécaniques (11).
  5. Dispositif selon la revendication 4, dans lequel ladite plaque (8) est réalisée en alliage d'aluminium.
  6. Dispositif selon une ou plusieurs des revendications précédentes, dans lequel ladite DEL (4) a une puissance comprise entre 10 W et 30 W.
  7. Dispositif selon une ou plusieurs des revendications précédentes, comprenant des connexions électriques (5) aptes à alimenter ladite DEL (4) et au moins partiellement placées à l'intérieur de ladite tige (2).
  8. Dispositif selon la revendication 7, dans lequel ladite tige (2) comprend une ouverture (3b) apte à mettre l'intérieur de ladite tige (2) en communication avec la surface extérieure et dans lequel lesdites connexions électriques (5) passent à travers ladite ouverture (3b).
  9. Dispositif selon une ou plusieurs des revendications précédentes, dans lequel ladite tige (2) a un diamètre extérieur compris entre 2 mm et 4 mm.
EP09721050.4A 2008-03-13 2009-03-10 Structure de support pour dispositifs d'éclairage à del Active EP2260232B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000428A ITMI20080428A1 (it) 2008-03-13 2008-03-13 Struttura di sostegno di led per illuminazione
PCT/IB2009/000474 WO2009112927A2 (fr) 2008-03-13 2009-03-10 Structure de support pour dispositifs d'éclairage à del

Publications (2)

Publication Number Publication Date
EP2260232A2 EP2260232A2 (fr) 2010-12-15
EP2260232B1 true EP2260232B1 (fr) 2014-05-07

Family

ID=40292887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09721050.4A Active EP2260232B1 (fr) 2008-03-13 2009-03-10 Structure de support pour dispositifs d'éclairage à del

Country Status (3)

Country Link
EP (1) EP2260232B1 (fr)
IT (1) ITMI20080428A1 (fr)
WO (1) WO2009112927A2 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108488694B (zh) * 2018-03-29 2021-03-12 东莞市闻誉实业有限公司 过道射灯

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050104059A1 (en) * 2003-11-14 2005-05-19 Friedman Marc D. Flexible array
US7434964B1 (en) * 2007-07-12 2008-10-14 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. LED lamp with a heat sink assembly
US20090040776A1 (en) * 2007-08-09 2009-02-12 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led lamp with a heat dissipation device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6857924B2 (en) * 2002-06-03 2005-02-22 Ta-Hao Fu Method of producing an LED hose light
US7114834B2 (en) * 2002-09-23 2006-10-03 Matrix Railway Corporation LED lighting apparatus
JP2004296245A (ja) * 2003-03-26 2004-10-21 Matsushita Electric Works Ltd Ｌｅｄランプ
DK176593B1 (da) * 2006-06-12 2008-10-13 Akj Inv S V Allan Krogh Jensen Intelligent LED baseret lyskilde til erstatning af lysstofrör

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050104059A1 (en) * 2003-11-14 2005-05-19 Friedman Marc D. Flexible array
US7434964B1 (en) * 2007-07-12 2008-10-14 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. LED lamp with a heat sink assembly
US20090040776A1 (en) * 2007-08-09 2009-02-12 Fu Zhun Precision Industry (Shen Zhen) Co., Ltd. Led lamp with a heat dissipation device

Also Published As

Publication number Publication date
WO2009112927A3 (fr) 2009-11-05
WO2009112927A2 (fr) 2009-09-17
ITMI20080428A1 (it) 2009-09-14
EP2260232A2 (fr) 2010-12-15

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