EP1754936B1 - Cooling device for light emitting element - Google Patents
Cooling device for light emitting element Download PDFInfo
- 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.)
- Not-in-force
Links
Images
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)
Abstract
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. In particular, 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 . - Furthermore, 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. 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 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 (θ) therebetween.
- 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 an embodiment of a light emitting assembly according to prior art; -
Fig. 2 is a schematic cross-sectional view of an embodiment according to prior art, illustrating connection between a circuit board and a light emitting device; -
Fig. 3 is a perspective view of an embodiment of the light emitting assembly according to prior art; and -
Fig. 4 is a perspective view of an embodiment of the light emitting assembly according to this invention. - Referring to
Figs. 1 and2 , an embodiment of a light emitting assembly according to prior art is shown to include alight emitting device 20 and a thermally conductive heat-dissipating device 10. Thelight emitting device 20 includes a thermallyconductive diode seat 22 and alight emitting diode 21 mounted on thediode seat 22. The thermally conductive heat-dissipating device 10 includes aseat body 100 that has anupper surface 101 on which thediode seat 22 is mounted, and that is provided with a plurality offins 103 projecting therefrom and spaced apart from each other. - The
seat body 100 of the heat-dissipating device 10 is formed with arecess 104 indented inwardly from theupper surface 101 of theseat body 100. Thediode seat 22 has acylindrical body 222 that is fitted into therecess 104, and anannular flange 221 that is enlarged in cross-section from thecylindrical body 222 and that contacts theupper surface 101 of theseat body 100 at a periphery of therecess 104. - The
diode seat 22 further has anannular wall 224 that extends upwardly, and that is reduced in cross-section from theannular flange 221. Thelight emitting diode 21 is received in theannular wall 224, and has a pair ofconductive terminals 223 extending downwardly through theannular flange 221 and thecylindrical body 222. - Referring to
Fig. 2 , the light emitting assembly may further include acircuit board 40, and a plurality offasteners 30. Thecircuit board 40 is disposed below and is spaced apart from theseat body 100, and thefins 103 extend between theseat body 100 and thecircuit board 40. Thecircuit board 40 has a plurality of first through-holes 401 and a plurality of second through-holes 402. Each of thefasteners 30 extends through arespective fastening hole 105 in theseat body 100 and a respective first throughhole 401 in thecircuit board 40, so as to secure thecircuit board 40 to theseat body 100. In addition, each of theconductive terminals 223, which extend downwardly from thelight emitting diode 21, extends through a respective one of the second through-holes 402 so as to couple electrically thelight emitting diode 21 to thecircuit board 40. - Each of the
fasteners 30 may include ascrew rod 301 extending through therespective fastening hole 105 and the respective first through-hole 401, and a pair ofscrew nuts 302 that engage threadedly and respectively two opposite ends of thescrew rod 301. -
Fig. 3 illustrates an embodiment of the light emitting assembly according to prior art. In this embodiment, theseat body 100 has a peripheral edge. Thefins 103 are distributed along and extend downwardly from the peripheral edge of theseat body 100. -
Fig. 4 illustrates an embodiment of the light emitting assembly according to this invention. In this embodiment, two adjacent ones of thefins 103 extend downwardly from theseat 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. - Preferably, the
seat body 100 of the heat-dissipating device 10 is formed with arecess 104 indented inwardly from theupper surface 101 of theseat body 100. Thediode seat 22 has acylindrical body 222 that is fitted into therecess 104, and anannular flange 221 that is enlarged in cross-section from thecylindrical body 222 and that contacts theupper surface 101 of theseat body 100 at a periphery of therecess 104. - Preferably, the
diode seat 22 further has anannular wall 224 that extends upwardly, and that is reduced in cross-section from theannular flange 221. Thelight emitting diode 21 is received in theannular wall 224, and has a pair ofconductive terminals 223 extending downwardly through theannular flange 221 and thecylindrical body 222. - Preferably, the light emitting assembly may further include a
circuit board 40, and a plurality offasteners 30. Thecircuit board 40 is disposed below and is spaced apart from theseat body 100, and thefins 103 extend between theseat body 100 and thecircuit board 40. Thecircuit board 40 has a plurality of first through-holes 401 and a plurality of second through-holes 402. Each of thefasteners 30 extends through arespective fastening hole 105 in theseat body 100 and a respective first throughhole 401 in thecircuit board 40, so as to secure thecircuit board 40 to theseat body 100. In addition, each of theconductive terminals 223, which extend downwardly from thelight emitting diode 21, extends through a respective one of the second through-holes 402 so as to couple electrically thelight emitting diode 21 to thecircuit board 40. - Preferably, each of the
fasteners 30 includes ascrew rod 301 extending through therespective fastening hole 105 and the respective first through-hole 401, and a pair ofscrew nuts 302 that engage threadedly and respectively two opposite ends of thescrew rod 301. - According to the present invention, the heat generated by the
light emitting diode 21 can be efficiently dissipated by the thermally conductive heat-dissipatingdevice 10 by virtue of thefins 103 of a specific design. Therefore, heat damage to thelight emitting diode 20 and the nearby components can be avoided.
Claims (4)
- A light emitting assembly including
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; and wherein 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);
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. - The light emitting assembly of claim 1, characterized in that said seat body (100) of said heat-dlsslpatlng 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).
- 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 annular wall (224) and having a pair of conductive terminals (223) extending downwardly through said annular flange (221) and said cylindrical body (222).
- 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).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
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 |
EP05017833A EP1754936B1 (en) | 2005-08-17 | 2005-08-17 | Cooling device for light emitting element |
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 EP1754936A1 (en) | 2007-02-21 |
EP1754936B1 true 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) |
Families Citing this family (2)
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 |
FR2943761B1 (en) * | 2009-03-31 | 2013-04-19 | Mafelec | LIGHT EMITTING DIODE, ESPECIALLY FOR LIGHT SIGNALING DEVICE AND DEVICE EQUIPPED WITH SUCH A LIGHT SOURCE |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2818984B2 (en) * | 1992-03-04 | 1998-10-30 | 株式会社 ケー・シー・シー・商会 | Illuminated display for mosaic panels |
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 |
JP2005513815A (en) * | 2001-12-29 | 2005-05-12 | 杭州富陽新穎電子有限公司 | Light emitting diode and light emitting diode 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 |
ITTO20030165A1 (en) * | 2003-03-06 | 2004-09-07 | Space Cannon Vh S P A | LED LIGHT PROJECTOR |
US7196459B2 (en) * | 2003-12-05 | 2007-03-27 | International Resistive Co. Of Texas, L.P. | Light emitting assembly with heat dissipating support |
-
2005
- 2005-08-17 DE DE602005011277T patent/DE602005011277D1/en active Active
- 2005-08-17 EP EP05017833A patent/EP1754936B1/en not_active Not-in-force
- 2005-08-17 AT AT05017833T patent/ATE415596T1/en not_active IP Right Cessation
-
2007
- 2007-05-11 HK HK07105033.1A patent/HK1100298A1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
HK1100298A1 (en) | 2007-09-14 |
ATE415596T1 (en) | 2008-12-15 |
DE602005011277D1 (en) | 2009-01-08 |
EP1754936A1 (en) | 2007-02-21 |
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