EP2260232A2 - Support structure for led lighting devices - Google Patents

Support structure for led lighting devices

Info

Publication number
EP2260232A2
EP2260232A2 EP09721050A EP09721050A EP2260232A2 EP 2260232 A2 EP2260232 A2 EP 2260232A2 EP 09721050 A EP09721050 A EP 09721050A EP 09721050 A EP09721050 A EP 09721050A EP 2260232 A2 EP2260232 A2 EP 2260232A2
Authority
EP
European Patent Office
Prior art keywords
rod
structure according
support
led
support surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09721050A
Other languages
German (de)
French (fr)
Other versions
EP2260232B1 (en
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
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP2260232A2 publication Critical patent/EP2260232A2/en
Application granted granted Critical
Publication of EP2260232B1 publication Critical patent/EP2260232B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • 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
    • 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
    • F21V29/85—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]

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)

Abstract

There is described a support structure (1) for at least one LED lighting device (4), comprising a rod (2) substantially circular and hollow comprising support means (3) including a support surface (3a), defined by a flattened portion of the rod (2), and a plate (8) fixed to the support surface (3a) and suitable to support the LED (4), the support structure (1) allowing optimal dispersion of the heat coming from the LED (4).

Description

DESCRIPTION SUPPORT STRUCTURE FOR LED LIGHTING DEVICES
The present invention relates to a support structure for LED lighting devices of the type described in the preamble of Claim 1. There are currently known 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. In particular, LEDs have a very small volume, even less than one cm3, very high efficiency, produce a light that can obtain a desired colour, switch on very quickly when energized by electrical current and so forth. As well as said advantages, LED lighting devices also have some considerable drawbacks. In fact, having powers of over one Watt, 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. In this situation the technical aim of the present invention is to devise a support structure for LED lighting devices capable of substantially overcoming the aforesaid drawbacks.
Within said technical aim an important object of the invention is to achieve a support structure for LED lighting devices which allows optimum heat dissipa- tion. Another important object of the invention is to produce a simple and inexpensive support structure for LED lighting devices.
The technical aim and the objects specified are achieved by a support structure for LED lighting devices as claimed in the appended claim 1. Preferred embodiments are highlighted in the dependent claims.
Other characteristics and advantages of the invention are further elucidated in the following detailed description of a preferred embodiment of the invention, with reference to the accompanying drawings, wherein:
Fig. 1 shows a overall top view of the support structure according to the invention and an enlargement of a detail;
Fig. 2 shows a side view of a detail of the support structure; Fig. 3 shows the normal section Ill-Ill, indicated in Fig. 1 , of the support structure; and
Fig. 4 shows the normal section IV-IV, indicated in Fig. 1 , of the support structure.
With reference to the Figures, the support structure according to the invention is indicated as a whole with the number 1.
It comprises a rod 2 and, preferably, support means 3, suitable to support at least one LED 4. Several 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 of metal material, preferably 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 1 mm and 30 mm, more preferably between 2 mm and 6 mm, and even more prefera- bly between 2 mm and 4 mm, and a diameter of the internal hollow 2a preferably of between 0.3 mm and 20 mm, more preferably between 1 mm and 5 mm and even more preferably 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 preferably 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 preferably realized by a flattened portion of the rod 2. For example, 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. In particular, 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.
Moreover, as this is a plastic deformation, the entire portion of rod 2 corresponding to the support surface 3a will be deformed by said flattening, as shown in a simplified manner in Fig. 4. Finally, 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.
Moreover, 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.
Moreover, 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. This solution allows dissipation of heat along both sides in the direction of extension of the rod 2. 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 preferably 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. It is conveniently fixed to the support surface 3a by means of releasable me- chanical connections, such as two screws 11 disposed in proximity of the ends of the plate 8.
This solution makes it possible to avoid the presence of glues, which could reduce heat transmission between the plate 8 and the rod 2. Moreover, 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 be- tween 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. It is known per se and realized, for example, by the LED known with the trade name PHILIPS LUMILED LUXEON Rebel.
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 alter- natively, 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.
These conductor wires 6 without the sheath 7 then pass through the opening 3b and connect, mechanically and electrically, to at least one clamping element 9. Preferably, two 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. The connection elements 10, also preferably two in number, 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 plate 8, including the connection elements 10 conveniently disposed on the surface, is finally preferably coated with white paint along the outer surface. The support structure 1 according to the invention achieves important advantages.
In fact, due to the particular shape, 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.
In particular, 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. Moreover, 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- ments which allow superior cooling of the LED 2.
Furthermore, the structure 1 is easily deformable in an axial direction and therefore allows the rod 2 to be shaped as required.
Yet another advantage is given by the fact that the structure 1 does not have exposed cables which can give the structure an unsightly appearance.
The invention is susceptible to modifications and variants falling within the inventive concept.
All the details can be replaced by equivalent elements and the materials, the shapes and dimensions can be any.

Claims

1) A support structure (1) for at least one LED lighting device (4), characterized in that it comprises a substantially tubular and hollow rod (2) suitable to support said LED (4). 2) A structure according to claim 1, wherein said rod (2) is substantially circular and has an external diameter of between 2 mm and 6 mm, and an internal diameter of between 1 mm and 3 mm.
3) A structure according to one or more of the preceding claims, wherein said rod is made of metal material with high conductivity. 4) A structure according to claim 3, wherein said metal material is a nickel plated copper alloy.
5) A structure according to one or more of the preceding claims, wherein said rod (2) comprises open ends.
6) A structure according to one or more of the preceding claims, compris- ing support means (3) having a support surface (3a) suitable to support said
LED (4).
7) A structure according to one or more of the preceding claims, wherein said support surface (3a) is defined by a flattened portion of said rod (2).
8) A structure according to claim 6 or 7, wherein said rod comprises an end (2b) and wherein said support surface (3a) is disposed at a distance of over 5 mm from said end (2b).
9) A structure according to claim 8, wherein said distance between said end (2b) and said support surface (3a) is greater than 5 mm.
10) A structure according to one or more of claims 5-7, comprising a plate (8) fixed to said support surface (3a) and suitable to support said LED (4). 11) A structure according to claim 7, wherein said plate (8) is fixed to said support surface (3a) by means of mechanical connections (11).
12) A structure according to claim 8 or 9, wherein said plate (8) is made of aluminium alloy. 13) A structure according to one or more of the preceding claims, wherein said LED (4) has a power of between 10 W and 30 W.
14) A structure according to one or more of the preceding claims, comprising electrical connections (5) suitable to supply power to said LED (4) and at least partly disposed inside said rod (2). 15) A structure according to claim 12, wherein said rod (2) comprises an opening (3b) suitable to place the inside of said rod (2) in communication with the outer surface and wherein said electrical connections (5) pass through said opening (3b).
EP09721050.4A 2008-03-13 2009-03-10 Support structure for led lighting devices Active EP2260232B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000428A ITMI20080428A1 (en) 2008-03-13 2008-03-13 LED SUPPORT STRUCTURE FOR LIGHTING
PCT/IB2009/000474 WO2009112927A2 (en) 2008-03-13 2009-03-10 Support structure for led lighting devices

Publications (2)

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

Family

ID=40292887

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09721050.4A Active EP2260232B1 (en) 2008-03-13 2009-03-10 Support structure for led lighting devices

Country Status (3)

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

Families Citing this family (1)

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

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 (en) * 2003-03-26 2004-10-21 Matsushita Electric Works Ltd Led lamp
DK176593B1 (en) * 2006-06-12 2008-10-13 Akj Inv S V Allan Krogh Jensen Intelligent LED based light source to replace fluorescent lamps

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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2009112927A2 *

Also Published As

Publication number Publication date
WO2009112927A3 (en) 2009-11-05
EP2260232B1 (en) 2014-05-07
WO2009112927A2 (en) 2009-09-17
ITMI20080428A1 (en) 2009-09-14

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