EP1754936A1 - Cooling device for light emitting element - Google Patents

Cooling device for light emitting element Download PDF

Info

Publication number
EP1754936A1
EP1754936A1 EP05017833A EP05017833A EP1754936A1 EP 1754936 A1 EP1754936 A1 EP 1754936A1 EP 05017833 A EP05017833 A EP 05017833A EP 05017833 A EP05017833 A EP 05017833A EP 1754936 A1 EP1754936 A1 EP 1754936A1
Authority
EP
European Patent Office
Prior art keywords
light emitting
seat body
seat
diode
circuit board
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
EP05017833A
Other languages
German (de)
French (fr)
Other versions
EP1754936B1 (en
Inventor
An-Si Chen
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.)
Excel Cell Electronic Co Ltd
Original Assignee
Excel Cell Electronic Co Ltd
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 Excel Cell Electronic Co Ltd filed Critical Excel Cell Electronic Co Ltd
Priority to EP05017833A priority Critical patent/EP1754936B1/en
Priority to DE602005011277T priority patent/DE602005011277D1/en
Priority to AT05017833T priority patent/ATE415596T1/en
Publication of EP1754936A1 publication Critical patent/EP1754936A1/en
Priority to HK07105033.1A priority patent/HK1100298A1/en
Application granted granted Critical
Publication of EP1754936B1 publication Critical patent/EP1754936B1/en
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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • 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
    • F21V29/745—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades the fins or blades being planar and inclined with respect to the joining surface from which the fins or blades extend
    • 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
    • F21V29/80—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with pins or wires
    • 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)
  • Led Device Packages (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

A light emitting assembly includes at least one light emitting device (20) having a thermally conductive diode seat (22) and a light emitting diode (21) mounted on the diode seat (22), and a thermally conductive heat-dissipating device (10) having a seat body (100) that has an upper surface (101) on which the diode seat (22) is mounted. The seat body (100) is provided with a plurality of fins (103) that project therefrom and that are spaced apart from each other.

Description

  • This invention relates to a light emitting assembly, more particularly to a light emitting assembly including a thermally conductive heat-dissipating device provided with a plurality of fins, and at least one light emitting device mounted on the thermally conductive heat-dissipating device.
  • Lighting devices that include a light emitting diode, such as automotive lighting devices and indoor lighting devices, are known in the art. However, when light is emitted from the light emitting diode, heat will be simultaneously generated by the light emitting diode, and the generated heat will increase with an increase in the intensity of the emitted light. The heat generated has to be sufficiently dissipated. Otherwise, it will accumulate in the light emitting diode and result in an increase in the temperature of the light emitting diode and those of components in the vicinity of the light emitting diode. The light emitting diode and the nearby components are easily damaged due to the elevated temperature.
  • Therefore, there is a need in the art to provide a light emitting assembly that includes a highly efficient heat-dissipating device.
  • Therefore, the object of the present invention is to provide a light emitting assembly that can overcome the aforesaid drawback of the prior art.
  • According to this invention, a light emitting assembly includes at least one light emitting device including a thermally conductive diode seat and a light emitting diode mounted on the diode seat, and a thermally conductive heat-dissipating device including a seat body that has an upper surface. The diode seat is mounted on the upper surface of the seat body. The seat body is provided with a plurality of fins that project therefrom and that are spaced apart from each other.
  • Other features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments of this invention, with reference to the accompanying drawings, in which:
    • Fig. 1 is a perspective view of the first preferred embodiment of a light emitting assembly according to this invention;
    • Fig. 2 is a schematic cross-sectional view of the first preferred embodiment, illustrating connection between a circuit board and a light emitting device;
    • Fig. 3 is a perspective view of the second preferred embodiment of the light emitting assembly according to this invention; and
    • Fig. 4 is a perspective view of the third preferred embodiment of the light emitting assembly according to this invention.
  • Referring to Figs. 1 and 2, the first preferred embodiment of a light emitting assembly according to the present invention is shown to include a light emitting device 20 and a thermally conductive heat-dissipating device 10. The light emitting device 20 includes a thermally conductive diode seat 22 and a light emitting diode 21 mounted on the diode seat 22. The thermally conductive heat-dissipating device 10 includes a seat body 100 that has an upper surface 101 on which the diode seat 22 is mounted, and that is provided with a plurality of fins 103 projecting therefrom and spaced apart from each other.
  • Preferably, the seat body 100 of the heat-dissipating device 10 is formed with a recess 104 indented inwardly from the upper surface 101 of the seat body 100. The diode seat 22 has a cylindrical body 222 that is fitted into the recess 104, and an annular flange 221 that is enlarged in cross-section from the cylindrical body 222 and that contacts the upper surface 101 of the seat body 100 at a periphery of the recess 104.
  • The diode seat 22 further has an annular wall 224 that extends upwardly, and that is reduced in cross-section from the annular flange 221. The light emitting diode 21 is received in the annular wall 224, and has a pair of conductive terminals 223 extending downwardly through the annular flange 221 and the cylindrical body 222.
  • Referring to Fig. 2, the light emitting assembly may further include a circuit board 40, and a plurality of fasteners 30. The circuit board 40 is disposed below and is spaced apart from the seat body 100, and the fins 103 extend between the seat body 100 and the circuit board 40. The circuit board 40 has a plurality of first through-holes 401 and a plurality of second through-holes 402. Each of the fasteners 30 extends through a respective fastening hole 105 in the seat body 100 and a respective first through hole 401 in the circuit board 40, so as to secure the circuit board 40 to the seat body 100. In addition, each of the conductive terminals 223, which extend downwardly from the light emitting diode 21, extends through a respective one of the second through-holes 402 so as to couple electrically the light emitting diode 21 to the circuit board 40.
  • Preferably, each of the fasteners 30 includes a screw rod 301 extending through the respective fastening hole 105 and the respective first through-hole 401, and a pair of screw nuts 302 that engage threadedly and respectively two opposite ends of the screw rod 301.
  • Fig. 3 illustrates the second preferred embodiment of the light emitting assembly according to this invention. In this preferred embodiment, the seat body 100 has a peripheral edge. The fins 103 are distributed along and extend downwardly from the peripheral edge of the seat body 100.
  • Fig. 4 illustrates the third preferred embodiment of the light emitting assembly according to this invention. In this preferred embodiment, two adjacent ones of the fins 103 extend downwardly from the seat body 100 in a first direction (X) and a second direction (Y), respectively. The first direction (X) and the second direction (Y) form an acute angle θ therebetween.
  • According to the present invention, the heat generated by the light emittingdiode 21 canbe efficientlydissipated by the thermally conductive heat-dissipating device 10 by virtue of the fins 103 of a specific design. Therefore, heat damage to the light emitting diode 20 and the nearby components can be avoided.

Claims (6)

  1. A light emitting assembly characterized by:
    at least one light emitting device (20) including a thermally conductive diode seat (22) and a light emitting diode (21) mounted on said diode seat (22); and
    a thermally conductive heat-dissipating device (10) including a seat body (100) that has an upper surface (101);
    wherein said diode seat (22) is mounted on said upper surface (101) of said seat body (100); and
    wherein said seat body (100) is provided with a plurality of fins (103) that project therefrom and that are spaced apart from each other.
  2. The light emitting assembly of claim 1,
    characterized in that said seat body (100) of said heat-dissipating device (10) is formed with a recess (104) indented inwardly from said upper surface (101) of said seat body (100), said diode seat (22) having a cylindrical body (222) that is fitted into said recess (104), and an annular flange (221) that is enlarged in cross-section from said cylindrical body (222) and that contacts said upper surface (101) of said seat body (100) at a periphery of said recess (104).
  3. The light emitting assembly of claim 2,
    characterized in that said diode seat (22) further has an annular wall (224) that extends upwardly and that is reduced in cross-section from said annular flange (221), said light emitting diode (21) being received in said annularwall (224) andhavingapairof conductive terminals (223) extending downwardly through said annular flange (221) and said cylindrical body (222).
  4. The light emitting assembly of claim 1,
    characterized in that said seat body (100) has a peripheral edge, said fins (103) being distributed along and extending downwardly from said peripheral edge of said seat body (100).
  5. The light emitting assembly of claim 4,
    characterized in that two adjacent ones of said fins (103) extend downwardly from said seat body (100) in a first direction (X) and a second direction (Y), respectively, the first direction (X) and the second direction (Y) forming an acute angle (θ) therebetween.
  6. The light emitting assembly of claim 1, further
    characterized by a circuit board (40) that is disposed below said seat body (100) and that is spaced apart from said seat body (100), and a plurality of fasteners (30) extending through said seat body (100) and said circuit board (40) for securing said circuit board (40) to said seat body (100), said fins (103) extending between said seat body (100) and said circuit board (40), said light emitting diode (21) being electrically coupled to said circuit board (40).
EP05017833A 2005-08-17 2005-08-17 Cooling device for light emitting element Not-in-force EP1754936B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP05017833A EP1754936B1 (en) 2005-08-17 2005-08-17 Cooling device for light emitting element
DE602005011277T DE602005011277D1 (en) 2005-08-17 2005-08-17 Cooling device for light-emitting elements
AT05017833T ATE415596T1 (en) 2005-08-17 2005-08-17 COOLING DEVICE FOR LIGHT EMITTING ELEMENTS
HK07105033.1A HK1100298A1 (en) 2005-08-17 2007-05-11 Cooling device for light emitting element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05017833A EP1754936B1 (en) 2005-08-17 2005-08-17 Cooling device for light emitting element

Publications (2)

Publication Number Publication Date
EP1754936A1 true EP1754936A1 (en) 2007-02-21
EP1754936B1 EP1754936B1 (en) 2008-11-26

Family

ID=35517333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05017833A Not-in-force EP1754936B1 (en) 2005-08-17 2005-08-17 Cooling device for light emitting element

Country Status (4)

Country Link
EP (1) EP1754936B1 (en)
AT (1) ATE415596T1 (en)
DE (1) DE602005011277D1 (en)
HK (1) HK1100298A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101363603B (en) * 2007-08-08 2010-09-15 威菖股份有限公司 LED lamp group
FR2943761A1 (en) * 2009-03-31 2010-10-01 Mafelec LED light source for light signaling device in railway traffic field, has passage holes filled by electrical insulation and heat-conducting filling product so as to drown metallic fixation tabs to ensure electric insulation

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0559124A1 (en) * 1992-03-04 1993-09-08 K.C.C. Shokai Limited Illuminating display device for use with a mosaic panel
US6254262B1 (en) * 1998-11-27 2001-07-03 Crunk Paul D Signaling lamp having led light array with removable plastic lens
US20040057252A1 (en) * 2001-09-28 2004-03-25 Coushaine Charles M. Replaceable LED bulb with interchageable lens optic
DE10251955A1 (en) * 2002-11-08 2004-05-19 Hella Kg Hueck & Co. High-power LED insert module for motor vehicle, has dielectric in flat contact with heat sink and conductive track structure
WO2004079256A1 (en) * 2003-03-06 2004-09-16 Space Cannon Vh S.P.A. Led light projector
EP1467414A1 (en) * 2001-12-29 2004-10-13 Hangzhou Fuyang Xinying Dianzi Ltd. A led and led lamp
US20050122018A1 (en) * 2003-12-05 2005-06-09 Morris Thomas M. Light emitting assembly with heat dissipating support

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0559124A1 (en) * 1992-03-04 1993-09-08 K.C.C. Shokai Limited Illuminating display device for use with a mosaic panel
US6254262B1 (en) * 1998-11-27 2001-07-03 Crunk Paul D Signaling lamp having led light array with removable plastic lens
US20040057252A1 (en) * 2001-09-28 2004-03-25 Coushaine Charles M. Replaceable LED bulb with interchageable lens optic
EP1467414A1 (en) * 2001-12-29 2004-10-13 Hangzhou Fuyang Xinying Dianzi Ltd. A led and led lamp
DE10251955A1 (en) * 2002-11-08 2004-05-19 Hella Kg Hueck & Co. High-power LED insert module for motor vehicle, has dielectric in flat contact with heat sink and conductive track structure
WO2004079256A1 (en) * 2003-03-06 2004-09-16 Space Cannon Vh S.P.A. Led light projector
US20050122018A1 (en) * 2003-12-05 2005-06-09 Morris Thomas M. Light emitting assembly with heat dissipating support

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101363603B (en) * 2007-08-08 2010-09-15 威菖股份有限公司 LED lamp group
FR2943761A1 (en) * 2009-03-31 2010-10-01 Mafelec LED light source for light signaling device in railway traffic field, has passage holes filled by electrical insulation and heat-conducting filling product so as to drown metallic fixation tabs to ensure electric insulation

Also Published As

Publication number Publication date
EP1754936B1 (en) 2008-11-26
DE602005011277D1 (en) 2009-01-08
ATE415596T1 (en) 2008-12-15
HK1100298A1 (en) 2007-09-14

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