<19)United States
`<12)Patent Application
`Sun et al.
`
`Publication
`
`00>Pub.N0.:US 2006/0193139A1
`(43)Pub. Date:
`Aug. 31, 2006
`
`US 20060l93l39A1
`
`(54)
`
`(75)
`
`HEAT DISSIPATING APPARATUS FOR
`LIGHTING UTILITY
`
`Inventors: Tsung-'l‘lng Sun. Chung-Ho City (TW):
`Chang-Hung Tsai. Chtuig-Ho City
`(TW)
`
`Publication Classification
`
`(51)
`
`[nt.(3l.
`(2000.01)
`F21!’ 29/00
`(52) u.s.c|.
`
`.............................ss2/m;sc»2/9o;sc»2/294
`
`Correspondence Address:
`HDSL
`4331 STEVENS BATTLE LANE
`FAIRFAX, VA 22033 (US)
`
`(73)
`
`Assigiiee: Edison Opto Corporation
`
`(21)
`
`Appl. N0;
`
`ll/066,149
`
`(22)
`
`Filed:
`
`Feb. 25. 2005
`
`(57)
`
`ABSTRACT
`
`A heat dissipating zipparatiis for lighting iitility includes a
`casing zt light focusing unit a light reflecting unit a heat
`dissipating unit a light generator a wind gcncrator a cover
`and :1circn it board The heat dissipating unit ahsorhs 2|heat
`generated from the light geiiemtor
`the wind genemtor
`CIFCLIIZIILSair outsidc
`the casing and llhldk.
`the casing
`whereby the heat absorbed by the lieat-dissipating niiit is
`dissipated outside the casing
`
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`Patent Application Publication Aug. 31, 2006 Sheet 1 of 5
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`FIG 2
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`Patent Application Publication Aug. 31, 2006 Sheet 3 of 5
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`Patent Application Publication Aug. 31, 2006 Sheet 4 of 5
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`US 2006/0193139 A1
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`Patent Application Publication Aug. 31, 2006 Sheet 5 of 5
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`US 2006/0 I93 I39 A 1
`
`Aug. 31, 2006
`
`I-IEATDISSIPATING APPARATUS FOR LIGHTING
`UTILITY
`
`BACKGROUND OF TIIE INVENTION
`
`[0001]
`
`1. Field of the Invention
`
`[0002] The present invention relates to a heat dissipating
`apparatus for a li@ting utility, and more particularly to a
`heat dissipating apparatus for a lighting utility, Which has
`versatile operation modes and efiicient heat dissipation,
`whereby the lifetime of the lighting utility employing the
`same is enhanced.
`
`[0003]
`
`2. Description of Prior Art
`
`[0004] The light-emitting diodes (LEDs) are extensively
`applied to various applications including lighting utility.
`Therefore, the I,EDs are developed to provide high eflicient
`and
`power ability. However, considerable heal is also
`generated in lighting application, especially when the LEDs
`are sealed in a closed casing. The performance and lifetime
`of LEDs are degraded when excessive heal cannot be
`dissipated.
`
`[0005] To overcome above drawbacks, means for heat
`dissipation is provided on package or stage of the LEDs for
`removing heat from the LEDs. However, the heat removed
`from the I.F.Ds still exists in the closed casing. The heat
`dissipation result is not satisfactory a11dthe lifetime of LEDs
`is also degraded.
`
`[0006] Taiwan patent publication No. 568983 discloses a
`heat-dissipating defiexion cap for a lamp and a fan behind
`the heat-dissipating cap. The fan drives air to flow through
`the defiexion cap for heat dissipation. However, the heat
`dissipation is not satisfactory and there is only one heat
`dissipation mode.
`
`SUMMARY OF T1-11:‘lNVl:'NTlON
`
`[0007] The present invention provides a heat dissipating
`apparatus for lighting utility. which has versatile operation
`modes and efficient heat dissipation, whereby the lifetime of
`the lighting utility employing the same is enhanced.
`
`[0003] The present invention provides a heat dissipating
`apparatus for lighting utility. The heat dissipating apparatus
`comprises a casing With a bulge portion at front side thereof
`and the bulge portion comprising at least one vent hole
`communicated with a hollow of the casing; a light-reflecting
`u11itarranged in the casing; a heat-dissipating u11itarranged
`on the light-retlecting unit and comprising at least one
`contact section in contact With the casing; a light generator
`arranged on the heat-dissipating unit and corresponding to
`the light-reflecting unit; a wind generator arranged on the
`heat-dissipating unit; a cover arranged o11the casing and a
`circuit board arranged in the casing. The heat-dissipating
`unit absorbs a heat generated from the light generator, the
`wi11dgenerator circulates air outside the casing a11dinside
`the casing, whereby the heat absorbed by the heat-dissipat­
`ing u11itis dissipated outside the casi11g.
`
`BRIEF DESCRIPTION OF DRAWING
`
`[0009] The features of the invention believed to be novel
`are set forth with particularity in the appended claims. The
`invention itself however may be best understood by refer­
`ence to the following detailed description of the invention,
`
`which describes certain exemplary embodiments of the
`invention,
`taken i11 conjunction with the accompanying
`drawings in which:
`
`[0010] FIG. I is an exploded view ofa lighting utility with
`the heat dissipating apparatus according to the present
`invention.
`
`[0011] FIG. 2 is a perspective view of a lighting utility
`with the heat dissipating apparatus according to the present
`invention.
`
`[0012] FIG. 3 shows the heat-dissipating operation ofthe
`heat dissipating apparatus for lighting utility according to
`the present invention.
`
`[0013] FIG. 4 shows another heat-dissipating operation of
`the heat dissipating apparatus for lighting utility according
`to the present invention.
`
`[0014] FIG. 5 shows still another heat-dissipating opera­
`tion of the heat dissipating apparatus for lighting utility
`according to the present invention.
`
`DETAILED DESCRIPTION OF TIIE
`INVENTION
`
`[0015] The heat dissipating apparatus for lighting utility
`according to the present invention comprises a casi11g1, a
`light-focusing unit 2, a light-reflecting unit 3, a heat-dissi­
`pati11gu11it4, a light generator 5. a wind generator 6. a cover
`7 and a circuit board 8.
`
`[0016] The casing 1 is made of thermally conductive
`material and is of hollow shape. The casing 1 comprises a
`bulge portion 11 located at front side thereof and having at
`least one vent hole 12 communicating with hollow of the
`casing 1. The bulge portion 11 comprises an inner wall 13 to
`define an entrance 14 for assembling the light-reflecting unit
`3. At least one cla111pinghole 15 is defined 011the imier Wall
`13 for assembling the light-reflecting unit 3. A plurality of
`through holes 16 are defined on peripheral of the casing and
`a thermal radiating material is coated or sprayed on outer
`face of t_hecasi11g1 to enhance heat dissipating for the casing
`1.
`
`[0017] The light-focusing unit 2 is arranged on an opening
`31 of the light-reflecting unit 3 and comprises a lens to focus
`the light from the light generator 5 to a place for illumina­
`lion.
`
`[0018] The light-reflecting un.it 3 is placed on the inner
`wall 13 and the opening 31 is defined on one end of the
`light-reflecting u11it3 With a light-reflecting face 32 therein.
`The light-reflecting face 32 reflects light generated from the
`light generator 5 such that
`the light
`is reflected to the
`light-focusing unit 2. Moreover. an inlet 33 is defined at
`another end of the light-reflecting unit 3 and used for
`receiving the light generator 5. Moreover, a convex 34 is
`arranged on peripheral of the opening 31 and corresponding
`to the clamping hole 15.
`
`[0019] The l1eat-dissipating unit 4 is made of thermally
`conductive metal and arranged on the inlet 33. The heat­
`dissipating unit 4 absorbs heat from the light generator 5 and
`conveys the heat to a plurality of fins 41 thereof for heat
`dissipation. At
`least one contact section 42 is arranged
`between the fins 41 and has close contact Withthe inner Wall
`of the casing 1 to convey hear to the casing 1.
`
`

`

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`
`US 2006/0 I93 I39 A 1
`
`Aug. 31, 2006
`
`[0020] The light generator 5 is arranged on the heat­
`dissipating unit 4 and corresponding to tl1einlet 33. The light
`generator 5 is LED or light bulb.
`
`hole 12 on another side. ln this arrangement, the air flows in
`from front portion and then llows out from front portion of
`the heat dissipating apparatus.
`
`[0021] The wind generator 6 is arranged on the same side
`of the heat-dissipating unit 4 and can be one of radial fan and
`axial fan to produce a wind to expel the heat out of the casing
`1.
`
`[0022] The cover 7 is arranged on bottom of the casing 1
`a11dcomprises a flange 71 witl1a plurality of slots 72 through
`which the heat is expelled out of casing I or external air
`enters the casing 1.
`
`[0023] The circuit board 8 is placed in the casing 1 to
`provide electrical power to the light generator 5 and the wind
`generator 6.
`
`[0024] FIG. 3 shows the heat-dissipating operation of the
`heat dissipating apparatus for lighting utility according to
`the present invention. When the light generator 5 is tumed
`on, the light
`is projected,
`through the reflection of the
`light-rellecting face 32, to the light-focusing unit 2. After tl1e
`light is focused by the light-focusing unit 2, the focused light
`is projected to a place for illumi11atio11.The heat generated
`by the light generator 5 is conveyed to the heat-dissipating
`unit 4 and then conveyed to the casing 1 through the contact
`section 42. The wind generator 6 is operated to draw exteni
`air to t_heheat-dissipating un_it4 through the through l1ole 16
`and the slot 72. The heat is conveyed to top portion of the
`casing 1 a11d expelled through the vent hole 12.
`l11this
`arrangement, the air flows from rear portion to front portion
`of the heat dissipating apparatus for lighting utility accord­
`ing to the present invention.
`
`t_hewind generator 6 car1 be reversely
`[0025] Moreover,
`operated to draw external air to the heat-dissipating unit 4
`through the vent l1ole 12. The heat of the heat-dissipating
`unit 4 is conveyed out of the casing I through the through
`holes 16 and the slots 72. In this arrangement, the air flows
`fro111front portion to rear portion of the heat dissipating
`apparatus for lighting utility according to the present inven­
`tion.
`
`[0026] FIG. 4 shows another heat-dissipating operation of
`the heat dissipating apparatus for lighting utility according
`to the present invention. l11this example. the through holes
`16 and the slots 72 are not provided. The heat-dissipating
`unit 4' is not in contact With the inner wall of the casing 1
`a11da passageway 17 is provided in the casing 1. When the
`wind generator 6 is operated, an extenial air is drawn into the
`passageway 17 through the vent hole 12 on one side and then
`flows to the l1eat-dissipati11gu11it4‘.Afterward the air flows
`out ofthe casing l through the passageway 13 and the vent
`hole 12 on another side. In this arrangement, the air fiows in
`fro111front portion a11dthen fiows out from front portion of
`the heat dissipating apparatus.
`
`[0027] FIG. 5 shows still another heat-dissipating opera­
`tion of the heat dissipating apparatus for lighting utility
`according to the present invention. In this example, the heat
`dissipating apparatus has similar elements as those shown in
`FIG. 4 except that the wind generator 6 is placed on one
`lateral side of the heat-dissipating unit 4'. When the wind
`generator 6 is operated, an extemal air is draw11 i11tothe
`passageway 17 through the vent hole 12 on one side and then
`flows to the heat-dissipating tmit 4‘.Afterward, the air flows
`out of the casing 1 through the passageway 18 and the vent
`
`[0028] Moreover, a power input 73 is arranged on one face
`of the cover 7, which can be plugged to a power socket.
`
`[0029] Moreover, the heat-dissipating u11it4 ca11be one of
`thermal conductive plate,
`isothermal plate and heat pipe
`besides the fins.
`
`[0030] Although the present invention has been described
`with reference to the preferred embodiment thereof, it will
`be understood that the invention is not limited to the details
`thereof. Various substitutions and modifications l1ave sug­
`gested in the foregoing description, and other will occur to
`those of ordinary skill in the art. Therefore, all such substi­
`tutions and modifications are intended to be embraced
`within the scope of the invention as defned in the appended
`claims.
`
`1. A heat dissipating apparatus for lighting utility, coin­
`prising
`
`a casing comprising a bulge portion at front side thereof
`and the bulge portion comprising at least one vent l1ole
`comrnunicating with a hollow of the casing;
`
`a light-reflecting unit arranged in the casing;
`
`a heat-dissipating unit arranged on the light-reflecting u11it
`and comprising at least one contact section in contact
`with the casing;
`
`a light generator arranged on the heat-dissipating unit and
`corresponding to the light-retlecting unit; and
`
`a wind generator arranged on the heat-dissipating unit,
`
`wherein the heat-dissipating unit absorbs a heat generated
`from the light generator, the wind generator circulates
`air outside the casing and inside the casing, whereby
`the heat absorbed by the heat-dissipating unit is dissi­
`pated outside the casing.
`2. The heat dissipating apparatus as in claim l, wherein
`the casing is made of thermally conductive material and
`comprises of a plurality of vent holes on the bulge portion
`positioned at an ripper portion.
`3. The heat dissipating apparatus as in claim l, wherein
`the bulge portion comprises an inner wall to define an
`entrance.
`4. The heat dissipating apparatus as i11claim 3, wherein
`the inner wall comprises at least one clamping hole.
`5. The heat dissipating apparatus as in claim l, wherein
`the casing comprising a passageway therein.
`6. The heat dissipating apparatus as i11claim 1, wherein
`the light-rellecting unit comprises an opening defined on one
`side thereof and a light-reflecting face therein, an inlet is
`defined at another side ofthe light-reflecting unit a11dat least
`one convex is arranged on peripheral of the opening.
`7. The heat dissipating apparatus as in claim 6, wherein a
`light-focusing unit is assembled to the opening.
`8. The heat dissipating apparatus as in claim 7, wherein
`the light-focusing unit is a lens.
`9. The heat dissipating apparatus as in claim l, wherein
`the heat-dissipating unit is made of thermally conductive
`metal and composed of a plurality of fins.
`
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`US 2006/0 I93 I39 A 1
`
`Aug. 31, 2006
`
`10. The heat dissipating apparatus as in claim l, Wherein
`the heat-dissipating u11itis o11eof thermal conductive plate,
`isothermal plate and heat pipe.
`11. The heat dissipating apparatus as in claim 1, Wherein
`the ligl1t generator is one of LED and light bulb.
`12. The heat dissipating apparatus as in claim 1, further
`comprising a cover 011a bottom of tl1e casing.
`13. The heat dissipating apparatus as i11claim 12, wherein
`the cower comprises a flange in contact with the bottom of
`the casing, and comprising a plurality of slots therein.
`14. The heat dissipating apparatus as in claim l. further
`comprising a power input arranged on one face of the cover.
`15. The heat dissipating apparatus as in claim 1, wherein
`the Wind gencrator is a fan.
`
`16. The heat dissipating apparatus as in elaim l5, Whercin
`the Wind generator is arranged on one sidc ot' the hcat­
`dissipating unit.
`17. The heat dissipating apparatus as in elaim l, turther
`comprising a circuit board.
`IS. The hcat dissipating apparatus as in elaim 1, Whercin
`a thermal radiating material is coated or sprayed on outer
`face of the casing to enhance heat dissipating for the easing.
`19. (eaneeled)
`20. (canceled)
`
`