EP2534414A1 - Led lighting apparatus with improved thermal dissipation - Google Patents

Led lighting apparatus with improved thermal dissipation

Info

Publication number
EP2534414A1
EP2534414A1 EP11701400A EP11701400A EP2534414A1 EP 2534414 A1 EP2534414 A1 EP 2534414A1 EP 11701400 A EP11701400 A EP 11701400A EP 11701400 A EP11701400 A EP 11701400A EP 2534414 A1 EP2534414 A1 EP 2534414A1
Authority
EP
European Patent Office
Prior art keywords
lighting apparatus
leds
supporting plate
led lighting
thermal dissipation
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.)
Pending
Application number
EP11701400A
Other languages
German (de)
English (en)
French (fr)
Inventor
Carlotta De Bevilacqua
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 EP2534414A1 publication Critical patent/EP2534414A1/en
Pending legal-status Critical Current

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
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to an LED lighting apparatus with improved thermal dissipation.
  • LED lighting apparatuses which have the advantage of enabling a considerable energy saving, together with a considerable lifetime of the LEDs, are becoming increasingly common.
  • LEDs are particularly sensitive to heat levels, since at temperatures higher than 100°C the LEDs can be damaged, to the point where they fail permanently when a threshold of around 140°C is exceeded.
  • an object of the invention is to provide a lighting apparatus in which it is possible to use, for the LEDs, optical collimation systems that provide light beams with an aperture angle comparable with that of halogen light sources constituted by low-voltage lamps associated with aluminum reflectors for collimating the light beam.
  • Another object of the present invention is to provide a lighting apparatus that, thanks to its distinctive implementation characteristics, is capable of offering the widest guarantees of reliability and safety in use.
  • a further object of the present invention is to provide an LED lighting apparatus with improved thermal dissipation that can be easily made from elements and materials that are easily sourced on the market.
  • an LED lighting apparatus with improved thermal dissipation comprising a plate for supporting a plurality of LEDs which can be connected to an electric power source, characterized in that it comprises a heat sink constituted by a flat sheet made of thermally conducting material which is intimately associated with said supporting plate and protrudes beyond said supporting plate.
  • Figure 1 is a schematic perspective view of the lighting apparatus, according to the invention.
  • Figure 2 is a plan view of the lighting apparatus, seen from the side with the light sources;
  • Figure 3 is a side elevation view of the lighting apparatus.
  • the lighting apparatus generally indicated with the reference numeral 1, comprises a plate 2 for supporting a plurality of LEDs 3, which are provided with a conventional collimator, which are distributed on a relatively wide surface, according to a scheme which is basically determined by the dimensions of the lenses of the collimators which, typically, have a diameter of 20 mm or more.
  • the plate 2 is made of thermally conducting material which, advantageously, is constituted by an aluminum dissipation sheet that has a thermal conductibility that is measurable as 237 W/mK and, at the same time, is lower in cost than materials with higher thermal conductibility, such as, for example, copper or silver.
  • a heat sink which is constituted by a flat sheet 10, also made of thermally conducting material, such as aluminum, which is intimately connected to the supporting plate 2 by means of interposing a thermally conducting paste for minimizing thermal resistance between the two elements.
  • the experimental test was carried out with the apparatus arranged horizontally and in a clear area.
EP11701400A 2010-02-08 2011-01-28 Led lighting apparatus with improved thermal dissipation Pending EP2534414A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2010A000185A IT1398066B1 (it) 2010-02-08 2010-02-08 Apparecchio di illuminazione a led con dissipazione termica migliorata.
PCT/EP2011/051207 WO2011095438A1 (en) 2010-02-08 2011-01-28 Led lighting apparatus with improved thermal dissipation

Publications (1)

Publication Number Publication Date
EP2534414A1 true EP2534414A1 (en) 2012-12-19

Family

ID=42313955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11701400A Pending EP2534414A1 (en) 2010-02-08 2011-01-28 Led lighting apparatus with improved thermal dissipation

Country Status (3)

Country Link
EP (1) EP2534414A1 (it)
IT (1) IT1398066B1 (it)
WO (1) WO2011095438A1 (it)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201284961Y (zh) * 2008-10-24 2009-08-05 河北沐天太阳能科技发展有限公司 一种照射面积大的led路灯
CN101566329A (zh) * 2008-11-17 2009-10-28 常州雷德半导体科技有限公司 超真空散热装置在模块化大功率led路灯中的应用方法
CN201382290Y (zh) * 2009-04-10 2010-01-13 南京汉德森科技股份有限公司 具有防眩光结构的led筒灯

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7204615B2 (en) * 2003-03-31 2007-04-17 Lumination Llc LED light with active cooling
TWI303302B (en) * 2005-10-18 2008-11-21 Nat Univ Tsing Hua Heat dissipation devices for led lamps
TWI281363B (en) * 2005-12-14 2007-05-11 Jarrer Co Ltd Light-emitting diode work lamp
US20070165405A1 (en) * 2006-01-19 2007-07-19 Chuen-Shing Chen Water-resistant illumination apparatus
CN201050705Y (zh) * 2007-02-02 2008-04-23 深圳市光伏能源科技有限公司 高亮度led照明装置
CA2658679A1 (en) * 2006-11-13 2008-05-22 Hong-Yuan Technology Co., Ltd. Light emitting system
CN101567341A (zh) * 2008-04-23 2009-10-28 富准精密工业(深圳)有限公司 均热板散热装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201284961Y (zh) * 2008-10-24 2009-08-05 河北沐天太阳能科技发展有限公司 一种照射面积大的led路灯
CN101566329A (zh) * 2008-11-17 2009-10-28 常州雷德半导体科技有限公司 超真空散热装置在模块化大功率led路灯中的应用方法
CN201382290Y (zh) * 2009-04-10 2010-01-13 南京汉德森科技股份有限公司 具有防眩光结构的led筒灯

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2011095438A1 *

Also Published As

Publication number Publication date
ITMI20100185A1 (it) 2011-08-09
WO2011095438A1 (en) 2011-08-11
IT1398066B1 (it) 2013-02-07

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