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EP1754936B1 - Dispositif de refroidissement d'un émetteur de lumière - Google Patents

Dispositif de refroidissement d'un émetteur de lumière Download PDF

Info

Publication number
EP1754936B1
EP1754936B1 EP05017833A EP05017833A EP1754936B1 EP 1754936 B1 EP1754936 B1 EP 1754936B1 EP 05017833 A EP05017833 A EP 05017833A EP 05017833 A EP05017833 A EP 05017833A EP 1754936 B1 EP1754936 B1 EP 1754936B1
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.)
Expired - Lifetime
Application number
EP05017833A
Other languages
German (de)
English (en)
Other versions
EP1754936A1 (fr
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/fr
Priority to DE602005011277T priority patent/DE602005011277D1/de
Priority to AT05017833T priority patent/ATE415596T1/de
Publication of EP1754936A1 publication Critical patent/EP1754936A1/fr
Priority to HK07105033.1A priority patent/HK1100298B/en
Application granted granted Critical
Publication of EP1754936B1 publication Critical patent/EP1754936B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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]

Definitions

  • 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.
  • this invention relates to a light emitting assembly including at least one light emitting device including a thermally conductive diode seat and a light emitting diode mounted on said diode seat; and a thermally conductive heat-dissipating device including a seat body that has an upper surface; wherein said diode seat is mounted on said upper surface of said seat body; and wherein said seat body is provided with a plurality of fins that project therefrom and that are spaced apart from each other; and wherein said seat body has a peripheral edge, said fins being distributed along and extending downwardly from said peripheral edge of said seat body.
  • a light emitting assembly of this type is known from the European Patent Application EP 0 559 124 A1 .
  • the European Patent Application EP 1 467 414 A1 discloses a light emitting diode (LED) and a LED lamp consisted of LEDs.
  • the LED comprises at least one LED chip.
  • the LED is mounted on a high heat conductivity base and is connected to an applied power supply through a circuit board.
  • the LED chip also has a transparent medium layer on it.
  • the base top surface acts as a light reflective surface, or a light reflective surface is provided around the base, the LED comprises a screw extended downwards from the base bottom or a screw hole in the base bottom to connect the LED to a heat sink mechanically.
  • the LED is electrically connected to a driving circuit through its outgoing wires.
  • the driving circuit is in turn electrically connected to an electrical connector through its housing.
  • a LED lamp can be fabricated after the LED is enclosed in a transparent bulb housing.
  • Lighting devices that include a light emitting diode, such as automotive lighting devices and indoor lighting devices, are known in the art.
  • 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.
  • the object of the present invention is to provide a light emitting assembly that can overcome the aforesaid drawback of the prior art.
  • a light emitting assembly of the aforementioned kind is characterized in that two adjacent ones of said fins extend downwardly from said seat body in a first direction (X) and a second direction (Y), respectively, the first direction (X) and the second direction (Y) forming an acute angle ( ⁇ ) therebetween.
  • a light emitting assembly according to prior art 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.
  • 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.
  • 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.
  • 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.
  • Each of the fasteners 30 may include 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 an embodiment of the light emitting assembly according to prior art.
  • 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 an embodiment of the light emitting assembly according to this invention.
  • 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 ⁇ therebetween.
  • 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.
  • 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.
  • 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.
  • 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.
  • the heat generated by the light emitting diode 21 can be efficiently dissipated 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.

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)

Claims (4)

  1. Assemblage émettant de la lumière comprenant
    au moins un dispositif émettant de la lumière (20) comprenant un support de diode thermoconducteur (22) et une diode électroluminescente (21) montée sur ledit support de diode (22) ; et un dispositif de dissipation thermique thermoconducteur (10) comprenant un corps de support (100) ayant une surface supérieure (101) ; ledit support de diode (22) étant monté sur ladite surface supérieure (101) dudit corps de support (100) ; et ledit corps de support (100) étant pourvu d'une pluralité d'ailettes (103) qui font saillie depuis celui-ci et qui sont espacées les unes des autres ; et ledit corps de support (100) ayant un bord périphérique, lesdites ailettes (103) étant réparties le long dudit bord périphérique et s'étendant vers le bas à partir dudit bord périphérique dudit corps de support (100) ;
    caractérisé en ce que
    deux ailettes adjacentes desdites ailettes (103) s'étendent vers le bas à partir dudit corps de support (100) dans une première direction (X) et une deuxième direction (Y), respectivement, la première direction (X) et la deuxième direction (Y) formant un angle aigu (θ) entre elles,
  2. Assemblage émettant de la lumière selon la revendication 1, caractérisé en ce que ledit corps de support (100) dudit dispositif de dissipation thermique (10) est formé d'un évidement (104) entaillé vers l'intérieur à partir de ladite surface supérieure (101) dudit corps de support (100), ledit support de diode (22) ayant un corps cylindrique (222) s'adaptant dans ledit évidement (104), et une bride annulaire (221) dont la section transversale est agrandie à partir dudit corps cylindrique (222) et qui est en contact avec ladite surface supérieure (101) dudit corps de support (100) au niveau d'une périphérie dudit évidement (104).
  3. Assemblage émettant de la lumière selon la revendication 2, caractérisé en ce que ledit support de diode (22) présente en outre une paroi annulaire (224) qui s'étend vers le haut et dont la section transversale est réduite à partir de ladite bride annulaire (221), ladite diode électroluminescente (21) étant accueillie dans ladite paroi annulaire (224) et ayant une paire de terminaux conducteurs (223) s'étendant vers le bas au travers de ladite bride annulaire (221) et dudit corps cylindrique (222),
  4. Assemblage émettant de la lumière selon la revendication 1, caractérisé en outre par un circuit imprimé (40) qui est disposé au-dessous dudit corps de support (100) et qui est espacé dudit corps de support (100), et une pluralité de fixations (30) s'étendant au travers dudit corps de support (100) et dudit circuit imprimé (40) pour fixer ledit circuit imprimé (40) audit corps de support (100), lesdites ailettes (103) s'étendant entre ledit corps de support (100) et ledit circuit imprimé (40), ladite diode électroluminescente (21) étant couplée électriquement audit circuit imprimé (40).
EP05017833A 2005-08-17 2005-08-17 Dispositif de refroidissement d'un émetteur de lumière Expired - Lifetime EP1754936B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP05017833A EP1754936B1 (fr) 2005-08-17 2005-08-17 Dispositif de refroidissement d'un émetteur de lumière
DE602005011277T DE602005011277D1 (de) 2005-08-17 2005-08-17 Kühlvorrichtung für lichtemittierende Elemente
AT05017833T ATE415596T1 (de) 2005-08-17 2005-08-17 Kühlvorrichtung für lichtemittierende elemente
HK07105033.1A HK1100298B (en) 2007-05-11 Cooling device for light emitting element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05017833A EP1754936B1 (fr) 2005-08-17 2005-08-17 Dispositif de refroidissement d'un émetteur de lumière

Publications (2)

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

Family

ID=35517333

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05017833A Expired - Lifetime EP1754936B1 (fr) 2005-08-17 2005-08-17 Dispositif de refroidissement d'un émetteur de lumière

Country Status (3)

Country Link
EP (1) EP1754936B1 (fr)
AT (1) ATE415596T1 (fr)
DE (1) DE602005011277D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101363603B (zh) * 2007-08-08 2010-09-15 威菖股份有限公司 发光二极管灯组
FR2943761B1 (fr) * 2009-03-31 2013-04-19 Mafelec Source lumineuse a diodes electroluminescentes en particulier pour dispositif de signalisation lumineuse et dispositif equipe d'une telle source lumineuse

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2818984B2 (ja) * 1992-03-04 1998-10-30 株式会社 ケー・シー・シー・商会 モザイク式パネル用照光表示装置
US6254262B1 (en) * 1998-11-27 2001-07-03 Crunk Paul D Signaling lamp having led light array with removable plastic lens
US6637921B2 (en) * 2001-09-28 2003-10-28 Osram Sylvania Inc. Replaceable LED bulb with interchangeable lens optic
US7497596B2 (en) * 2001-12-29 2009-03-03 Mane Lou LED and LED lamp
DE10251955A1 (de) * 2002-11-08 2004-05-19 Hella Kg Hueck & Co. Einbaumodul mit leistungsstarker LED, insbesondere für ein Kraftfahrzeug
ITTO20030165A1 (it) * 2003-03-06 2004-09-07 Space Cannon Vh S P A Proiettore di luce a led
US7196459B2 (en) * 2003-12-05 2007-03-27 International Resistive Co. Of Texas, L.P. Light emitting assembly with heat dissipating support

Also Published As

Publication number Publication date
ATE415596T1 (de) 2008-12-15
EP1754936A1 (fr) 2007-02-21
DE602005011277D1 (de) 2009-01-08
HK1100298A1 (en) 2007-09-14

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