EP2341275A1 - LED lamp having higher efficiency - Google Patents
LED lamp having higher efficiency Download PDFInfo
- Publication number
- EP2341275A1 EP2341275A1 EP09016067A EP09016067A EP2341275A1 EP 2341275 A1 EP2341275 A1 EP 2341275A1 EP 09016067 A EP09016067 A EP 09016067A EP 09016067 A EP09016067 A EP 09016067A EP 2341275 A1 EP2341275 A1 EP 2341275A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- alternating current
- heatsink
- led module
- housing
- heatsink housing
- 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.)
- Withdrawn
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Classifications
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- 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
- F21V3/00—Globes; Bowls; Cover glasses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/20—Light sources comprising attachment means
- F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
- F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
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- 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
- F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
- F21V29/507—Cooling arrangements characterised by the adaptation for cooling of specific components of means for protecting lighting devices from damage, e.g. housings
-
- 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
- F21V29/50—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
- F21V29/77—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section
- F21V29/773—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical diverging planar fins or blades, e.g. with fan-like or star-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
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- 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 a lamp and, more particularly, to an LED (light emitting diode) lamp to provide a lighting function.
- a conventional LED (light emitting diode) lamp comprises an LED to emit light outwardly so as to provide a lighting function.
- the LED is a heat source and easily produces a high temperature during operation, so that it is necessary to provide a heat sink to carry away the heat produced by the LED to prevent the LED from being inoperative due to an overheat.
- a conventional heat sink generally comprises a heatsink element, such as a metallic heatsink fin, a heat conductive tube, a chill enabling chip, a heat dissipation board, a cooling fan and the like, so as to provide a heat dissipation effect to the LED.
- the conventional heat sink cannot dissipate the heat from the heat source exactly and quickly, thereby greatly decreasing the heat dissipation efficiency.
- the conventional heat sink has a very complicated construction, thereby increasing the costs of fabrication. Further, the conventional heat sink does not have an electrically insulating feature, thereby causing danger during operation. Further, the conventional heat sink is not a standardized product so that it cannot be mounted on a traditional lamp.
- an LED (light emitting diode) lamp comprising a heatsink housing and an alternating current LED module mounted in the heatsink housing.
- the alternating current LED module includes a heat conducting portion and two electrical connections.
- the heat conducting portion of the alternating current LED module is combined with the heatsink housing.
- the electrical connections of the alternating current LED module are electrically connected with an external power supply.
- the heatsink housing forms a nonmetallic porous structure with a great heat dissipation feature.
- the heatsink housing is formed to have the profile of a common lamp housing.
- the heatsink housing has a hollow inside provided with a receiving chamber to receive the alternating current LED module.
- an LED (light emitting diode) lamp comprising a heatsink housing, at least one alternating current LED module mounted in the heatsink housing, and a heat conducting member mounted on the heatsink housing.
- the alternating current LED module includes a heat conducting portion and two electrical connections. The heat conducting portion of the alternating current LED module is combined with the heat conducting member. The electrical connections of the alternating current LED module are electrically connected with an external power supply.
- the heatsink housing forms a nonmetallic porous structure with a great heat dissipation feature.
- the heatsink housing is formed to have the profile of a common lamp housing.
- the primary objective of the present invention is to provide an LED lamp having a higher efficiency.
- Another objective of the present invention is to provide an LED lamp having a greater heatsink effect.
- a further objective of the present invention is to provide an LED lamp, wherein the heatsink housing forms a porous structure with a great heat dissipation feature and a high specific surface area to provide a greater heatsink effect and to quickly carry away the heat produced by the alternating current LED module so as to enhance the heat dissipation efficiency of the alternating current LED module.
- a further objective of the present invention is to provide an LED lamp, wherein the heatsink housing is directly formed to have the profile of a common lamp housing and is provided with a metallic screw base, an insulating gasket and a power contact plate so that the heatsink housing can be mounted on a traditional receptacle to replace the conventional electric bulb.
- an LED (light emitting diode) lamp in accordance with the preferred embodiment of the present invention comprises a heatsink housing 2, an alternating current LED module 1 mounted in the heatsink housing 2, and a shade 24 mounted on the heatsink housing 2 to encompass the alternating current LED module 1.
- the alternating current LED module 1 is a modularized product.
- the alternating current LED module 1 includes a heat conducting portion 10 and two electrical connections 11.
- the heat conducting portion 10 of the alternating current LED module 1 is combined with the heatsink housing 2.
- the electrical connections 11 of the alternating current LED module 1 are electrically connected with an external power supply (not shown) to electrically connect the alternating current LED module 1 to the external power supply.
- the heatsink housing 2 forms a porous structure with a great heat dissipation feature and a high specific surface area.
- the porous structure formed by the heatsink housing 2 is made of a nonmetallic powder (formed by an injection molding process) having a great heat conductivity, such as Al 2 O 3 , Zr 2 O, AIN, SiN, BN, WC, C, SiC, crystalline SiC, Recrystalline SiC (ReSiC) and the like.
- the nonmetallic powder making the porous structure is AIN and SiC.
- the heatsink housing 2 has a hollow inside provided with a receiving chamber 20 to receive the alternating current LED module 1.
- the heat conducting portion 10 of the alternating current LED module 1 is received in the receiving chamber 20 of the heatsink housing 2.
- the heatsink housing 2 is formed to have the profile of a common lamp housing (or socket).
- the heatsink housing 2 has a substantially semi-spherical profile.
- the heatsink housing 2 has an end portion provided with a threaded stud 28 for mounting a metallic screw base 21, an insulating gasket 22 and a power contact plate 23.
- each of the metallic screw base 21, the insulating gasket 22 and the power contact plate 23 has an international specification of E-27, E-14 and the like.
- the metallic screw base 21 and the power contact plate 23 are electrically connected to the electrical connections 11 of the alternating current LED module 1.
- the heatsink housing 2 has a surface provided with a plurality of heatsink grooves 27 to increase a heatsink surface area of the heatsink housing 2 so as to enhance the heat dissipation efficiency of the heatsink housing 2.
- the heatsink housing 2 has an electrically insulating feature.
- the heat produced by the alternating current LED module 1 is transferred by the heat conduction of the heatsink housing 2, so that the heat produced by the alternating current LED module 1 is carried away exactly and quickly so as to enhance the heat dissipation efficiency of the alternating current LED module 1.
- the heatsink housing 2 forms a porous structure with a great heat dissipation feature and a high specific surface area to provide a greater heatsink effect and to quickly carry away the heat produced by the alternating current LED module 1 so as to enhance the heat dissipation efficiency of the alternating current LED module 1.
- the heatsink housing 2 is directly formed to have the profile of a common lamp housing and is provided with a metallic screw base 21, an insulating gasket 22 and a power contact plate 23 so that the heatsink housing 2 can be mounted on a traditional receptacle to replace the conventional electric bulb.
- the LED lamp further comprises a heat conducting plate 3 mounted between the heat conducting portion 10 of the alternating current LED module 1 and the heatsink housing 2 to carry away the heat produced by the alternating current LED module 1 so as to enhance the heat dissipation efficiency of the alternating current LED module 1.
- the heat conducting plate 3 is made of a metal having a great heat conductivity, such as gold, silver, copper, iron, aluminum, cobalt, nickel, zinc, titanium, manganese and the like.
- the heat produced by the alternating current LED module 1 is transferred by the heat conduction and the heat convection between the heat conducting plate 3 and the heatsink housing 2, so that the heat produced by the alternating current LED module 1 is carried away exactly and quickly so as to enhance the heat dissipation efficiency of the alternating current LED module 1.
- the heatsink housing 2 co-operates with the heat conducting plate 3 to provide a greater heatsink effect and to quickly carry away the heat produced by the alternating current LED module 1 so as to enhance the heat dissipation efficiency of the alternating current LED module 1.
- the LED lamp further comprises a conduction board 30 mounted between the heat conducting plate 3 and the heatsink housing 2 to carry away the heat produced by the alternating current LED module 1 so as to enhance the heat dissipation efficiency of the alternating current LED module 1.
- the conduction board 30 is made of a metal having a great heat conductivity, such as gold, silver, copper, iron, aluminum, cobalt, nickel, zinc, titanium, manganese and the like.
- the heat of the heat conducting plate 3 is transmitted through the conduction board 30 to the heatsink housing 2 quickly so as to enhance the heat dissipation efficiency of the alternating current LED module 1.
- the LED lamp further comprises two connecting pins 25 (with an international specification of MR16 and the like) electrically connected with the electrical connections 11 of the alternating current LED module 1 and protruding outwardly from the heatsink housing 2 to electrically connect the alternating current LED module 1 to an external power supply (not shown).
- the LED lamp further comprises a reflective shade 26 mounted on the heatsink housing 2 to encompass the alternating current LED module 1.
- the LED lamp functions as a projection lamp to replace the traditional projection lamp.
- an LED (light emitting diode) lamp in accordance with another preferred embodiment of the present invention comprises a heatsink housing 5, at least one alternating current LED module 1 mounted in the heatsink housing 5, a heat conducting member 4 mounted on the heatsink housing 5 and a shade 54 mounted on the heatsink housing 5 to encompass the alternating current LED module 1 and the heat conducting member 4.
- the alternating current LED module 1 includes a heat conducting portion 10 and two electrical connections 11.
- the heat conducting portion 10 of the alternating current LED module 1 is combined with the heat conducting member 4.
- the electrical connections 11 of the alternating current LED module 1 are electrically connected with an external power supply (not shown) to electrically connect the alternating current LED module 1 to the external power supply.
- the heatsink housing 5 forms a porous structure with a great heat dissipation feature and a high specific surface area.
- the porous structure formed by the heatsink housing 5 is made of a nonmetallic powder (formed by an injection molding process) having a great heat conductivity, such as Al 2 O 3 , Zr 2 O, AIN, SiN, BN, WC, C, SiC, crystalline SiC, Recrystalline SiC (ReSiC) and the like.
- the nonmetallic powder making the porous structure is AIN and SiC.
- the heatsink housing 5 is formed to have the profile of a common lamp housing (or socket).
- the heatsink housing 5 has a substantially semi-spherical profile.
- the heatsink housing 5 has an end portion provided with a threaded stud 58 for mounting a metallic screw base 51, an insulating gasket 52 and a power contact plate 53.
- a metallic screw base 51, the insulating gasket 52 and the power contact plate 53 has an international specification of E-27, E-14 and the like.
- the metallic screw base 51 and the power contact plate 53 are electrically connected to the electrical connections 11 of the alternating current LED module 1.
- the heat conducting member 4 is preferably made of a metal having a great heat conductivity, such as gold, silver, copper, iron, aluminum, cobalt, nickel, zinc, titanium, manganese and the like.
- the heat conducting member 4 is preferably made of a nonmetallic material having a great heat conductivity, such as A1 2 O 3; Zr 2 O, AIN, SiN, BN, WC, C, SiC, crystalline SiC, Recrystalline SiC (ReSiC) and the like.
- the nonmetallic powder making the porous structure is AIN and SiC.
- the heat produced by the alternating current LED module 1 is transferred by the heat conduction and the heat convection between the heat conducting member 4 and the heatsink housing 5, so that the heat produced by the alternating current LED module 1 is carried away exactly and quickly so as to enhance the heat dissipation efficiency of the alternating current LED module 1.
- the alternating current LED module 1 is combined with the heat conducting member 4 after assembly.
- the heat conducting member 4 is directly integrally formed with the alternating current LED module 1.
- the heat conducting member 4 is directly integrally formed on the heatsink housing 5 to form a metallic heat conducting layer 40 on the heatsink housing 5.
- the heatsink housing 5 has a hollow inside provided with a receiving chamber 50 to receive the alternating current LED module 1 and the heat conducting member 4.
- the LED lamp further comprises two connecting pins 55 (with an international specification of MR16 and the like) electrically connected with the electrical connections 11 of the alternating current LED module 1 and protruding outwardly from the heatsink housing 5 to electrically connect the alternating current LED module 1 to an external power supply (not shown).
- the LED lamp further comprises a mounting board 58 mounted on the heatsink housing 5, and at least one reflective shade 56 mounted on the mounting board 58 to encompass the at least one alternating current LED module 1.
- the LED lamp functions as a projection lamp to replace the traditional projection lamp.
- the mounting board 58 has a plurality of ventilating holes 59 connected to the receiving chamber 50 the heatsink housing 5 to provide a heat convection effect so as to enhance the heat dissipation efficiency of the alternating current LED module 1.
- the heatsink housing 5 has a surface provided with a plurality of heatsink grooves 57 to increase a heatsink surface area of the heatsink housing 5 so as to enhance the heat dissipation efficiency of the heatsink housing 5.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
An LED lamp includes a heatsink housing (2) and an alternating current LED module (1). The alternating current LED module includes a heat conducting portion (10) combined with the heatsink housing and two electrical connections (11) electrically connected with an external power supply. Thus, the heatsink housing forms a porous structure to provide a greater heatsink effect and to quickly carry away the heat produced by the alternating current LED module to enhance the heat dissipation efficiency of the alternating current LED module. In addition, the heatsink housing is directly formed to have the profile of a common lamp housing and is provided with a metallic screw base (21), an insulating gasket (22) and a power contact plate (23) so that the heatsink housing can be mounted on a traditional receptacle to replace the conventional electric bulb.
Description
- The present invention relates to a lamp and, more particularly, to an LED (light emitting diode) lamp to provide a lighting function.
- A conventional LED (light emitting diode) lamp comprises an LED to emit light outwardly so as to provide a lighting function. However, the LED is a heat source and easily produces a high temperature during operation, so that it is necessary to provide a heat sink to carry away the heat produced by the LED to prevent the LED from being inoperative due to an overheat. A conventional heat sink generally comprises a heatsink element, such as a metallic heatsink fin, a heat conductive tube, a chill enabling chip, a heat dissipation board, a cooling fan and the like, so as to provide a heat dissipation effect to the LED. However, the conventional heat sink cannot dissipate the heat from the heat source exactly and quickly, thereby greatly decreasing the heat dissipation efficiency. In addition, the conventional heat sink has a very complicated construction, thereby increasing the costs of fabrication. Further, the conventional heat sink does not have an electrically insulating feature, thereby causing danger during operation. Further, the conventional heat sink is not a standardized product so that it cannot be mounted on a traditional lamp.
- In accordance with one embodiment of the present invention, there is provided an LED (light emitting diode) lamp, comprising a heatsink housing and an alternating current LED module mounted in the heatsink housing. The alternating current LED module includes a heat conducting portion and two electrical connections. The heat conducting portion of the alternating current LED module is combined with the heatsink housing. The electrical connections of the alternating current LED module are electrically connected with an external power supply. The heatsink housing forms a nonmetallic porous structure with a great heat dissipation feature. The heatsink housing is formed to have the profile of a common lamp housing. The heatsink housing has a hollow inside provided with a receiving chamber to receive the alternating current LED module.
- In accordance with another embodiment of the present invention, there is provided an LED (light emitting diode) lamp, comprising a heatsink housing, at least one alternating current LED module mounted in the heatsink housing, and a heat conducting member mounted on the heatsink housing. The alternating current LED module includes a heat conducting portion and two electrical connections. The heat conducting portion of the alternating current LED module is combined with the heat conducting member. The electrical connections of the alternating current LED module are electrically connected with an external power supply. The heatsink housing forms a nonmetallic porous structure with a great heat dissipation feature. The heatsink housing is formed to have the profile of a common lamp housing.
- The primary objective of the present invention is to provide an LED lamp having a higher efficiency.
- Another objective of the present invention is to provide an LED lamp having a greater heatsink effect.
- A further objective of the present invention is to provide an LED lamp, wherein the heatsink housing forms a porous structure with a great heat dissipation feature and a high specific surface area to provide a greater heatsink effect and to quickly carry away the heat produced by the alternating current LED module so as to enhance the heat dissipation efficiency of the alternating current LED module.
- A further objective of the present invention is to provide an LED lamp, wherein the heatsink housing is directly formed to have the profile of a common lamp housing and is provided with a metallic screw base, an insulating gasket and a power contact plate so that the heatsink housing can be mounted on a traditional receptacle to replace the conventional electric bulb.
- Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
- In the drawings:
-
Fig. 1 is a perspective view of an LED lamp in accordance with the preferred embodiment of the present invention. -
Fig. 2 is an exploded perspective view of the LED lamp as shown inFig. 1 . -
Fig. 3 is a front cross-sectional view of the LED lamp as shown inFig. 1 . -
Fig. 4 is an exploded perspective view of an LED lamp in accordance with another preferred embodiment of the present invention. -
Fig. 5 is a front cross-sectional assembly view of the LED lamp as shown inFig. 4 . -
Fig. 6 is an exploded perspective view of an LED lamp in accordance with another preferred embodiment of the present invention. -
Fig. 7 is a front cross-sectional assembly view of the LED lamp as shown inFig. 6 . -
Fig. 8 is a perspective view of an LED lamp in accordance with another preferred embodiment of the present invention. -
Fig. 9 is an exploded perspective view of the LED lamp as shown inFig. 8 . -
Fig. 10 is a front cross-sectional view of the LED lamp as shown inFig. 8 . -
Fig. 11 is an exploded perspective view of an LED lamp in accordance with another preferred embodiment of the present invention. -
Fig. 12 is a front cross-sectional assembly view of the LED lamp as shown inFig. 11 . -
Fig. 13 is an exploded perspective view of an LED lamp in accordance with another preferred embodiment of the present invention. -
Fig. 14 is a front cross-sectional assembly view of the LED lamp as shown inFig. 13 . -
Fig. 15 is an exploded perspective view of an LED lamp in accordance with another preferred embodiment of the present invention. -
Fig. 16 is a front cross-sectional view of an LED lamp in accordance with another preferred embodiment of the present invention. -
Fig. 17 is an exploded perspective view of an LED lamp in accordance with another preferred embodiment of the present invention. -
Fig. 18 is a front cross-sectional assembly view of the LED lamp as shown inFig. 17 . -
Fig. 19 is a perspective view of an LED lamp in accordance with another preferred embodiment of the present invention. -
Fig. 20 is an exploded perspective view of the LED lamp as shown inFig. 19 . -
Fig. 21 is a front cross-sectional view of the LED lamp as shown inFig. 19 . - Referring to the drawings and initially to
Figs. 1-3 , an LED (light emitting diode) lamp in accordance with the preferred embodiment of the present invention comprises aheatsink housing 2, an alternatingcurrent LED module 1 mounted in theheatsink housing 2, and ashade 24 mounted on theheatsink housing 2 to encompass the alternatingcurrent LED module 1. - The alternating
current LED module 1 is a modularized product. The alternatingcurrent LED module 1 includes aheat conducting portion 10 and twoelectrical connections 11. Theheat conducting portion 10 of the alternatingcurrent LED module 1 is combined with theheatsink housing 2. Theelectrical connections 11 of the alternatingcurrent LED module 1 are electrically connected with an external power supply (not shown) to electrically connect the alternatingcurrent LED module 1 to the external power supply. - The
heatsink housing 2 forms a porous structure with a great heat dissipation feature and a high specific surface area. The porous structure formed by theheatsink housing 2 is made of a nonmetallic powder (formed by an injection molding process) having a great heat conductivity, such as Al2O3, Zr2O, AIN, SiN, BN, WC, C, SiC, crystalline SiC, Recrystalline SiC (ReSiC) and the like. Preferably, the nonmetallic powder making the porous structure is AIN and SiC. Theheatsink housing 2 has a hollow inside provided with areceiving chamber 20 to receive the alternatingcurrent LED module 1. Preferably, theheat conducting portion 10 of the alternatingcurrent LED module 1 is received in thereceiving chamber 20 of theheatsink housing 2. Theheatsink housing 2 is formed to have the profile of a common lamp housing (or socket). Preferably, theheatsink housing 2 has a substantially semi-spherical profile. Theheatsink housing 2 has an end portion provided with a threadedstud 28 for mounting ametallic screw base 21, aninsulating gasket 22 and apower contact plate 23. Preferably, each of themetallic screw base 21, theinsulating gasket 22 and thepower contact plate 23 has an international specification of E-27, E-14 and the like. Themetallic screw base 21 and thepower contact plate 23 are electrically connected to theelectrical connections 11 of the alternatingcurrent LED module 1. Theheatsink housing 2 has a surface provided with a plurality ofheatsink grooves 27 to increase a heatsink surface area of theheatsink housing 2 so as to enhance the heat dissipation efficiency of theheatsink housing 2. Theheatsink housing 2 has an electrically insulating feature. - In operation, when the alternating
current LED module 1 is operated, the heat produced by the alternatingcurrent LED module 1 is transferred by the heat conduction of theheatsink housing 2, so that the heat produced by the alternatingcurrent LED module 1 is carried away exactly and quickly so as to enhance the heat dissipation efficiency of the alternatingcurrent LED module 1. - In such a manner, the
heatsink housing 2 forms a porous structure with a great heat dissipation feature and a high specific surface area to provide a greater heatsink effect and to quickly carry away the heat produced by the alternatingcurrent LED module 1 so as to enhance the heat dissipation efficiency of the alternatingcurrent LED module 1. In addition, theheatsink housing 2 is directly formed to have the profile of a common lamp housing and is provided with ametallic screw base 21, an insulatinggasket 22 and apower contact plate 23 so that theheatsink housing 2 can be mounted on a traditional receptacle to replace the conventional electric bulb. - Referring to
Figs. 4 and5 , the LED lamp further comprises aheat conducting plate 3 mounted between theheat conducting portion 10 of the alternatingcurrent LED module 1 and theheatsink housing 2 to carry away the heat produced by the alternatingcurrent LED module 1 so as to enhance the heat dissipation efficiency of the alternatingcurrent LED module 1. Theheat conducting plate 3 is made of a metal having a great heat conductivity, such as gold, silver, copper, iron, aluminum, cobalt, nickel, zinc, titanium, manganese and the like. - In operation, when the alternating
current LED module 1 is operated, the heat produced by the alternatingcurrent LED module 1 is transferred by the heat conduction and the heat convection between theheat conducting plate 3 and theheatsink housing 2, so that the heat produced by the alternatingcurrent LED module 1 is carried away exactly and quickly so as to enhance the heat dissipation efficiency of the alternatingcurrent LED module 1. - In such a manner, the
heatsink housing 2 co-operates with theheat conducting plate 3 to provide a greater heatsink effect and to quickly carry away the heat produced by the alternatingcurrent LED module 1 so as to enhance the heat dissipation efficiency of the alternatingcurrent LED module 1. - Referring to
Figs. 6 and7 , the LED lamp further comprises aconduction board 30 mounted between theheat conducting plate 3 and theheatsink housing 2 to carry away the heat produced by the alternatingcurrent LED module 1 so as to enhance the heat dissipation efficiency of the alternatingcurrent LED module 1. Theconduction board 30 is made of a metal having a great heat conductivity, such as gold, silver, copper, iron, aluminum, cobalt, nickel, zinc, titanium, manganese and the like. - In such a manner, the heat of the
heat conducting plate 3 is transmitted through theconduction board 30 to theheatsink housing 2 quickly so as to enhance the heat dissipation efficiency of the alternatingcurrent LED module 1. - Referring to
Figs. 8-12 , the LED lamp further comprises two connecting pins 25 (with an international specification of MR16 and the like) electrically connected with theelectrical connections 11 of the alternatingcurrent LED module 1 and protruding outwardly from theheatsink housing 2 to electrically connect the alternatingcurrent LED module 1 to an external power supply (not shown). The LED lamp further comprises areflective shade 26 mounted on theheatsink housing 2 to encompass the alternatingcurrent LED module 1. Thus, the LED lamp functions as a projection lamp to replace the traditional projection lamp. - Referring to
Figs. 13 and14 , an LED (light emitting diode) lamp in accordance with another preferred embodiment of the present invention comprises aheatsink housing 5, at least one alternatingcurrent LED module 1 mounted in theheatsink housing 5, aheat conducting member 4 mounted on theheatsink housing 5 and ashade 54 mounted on theheatsink housing 5 to encompass the alternatingcurrent LED module 1 and theheat conducting member 4. - The alternating
current LED module 1 includes aheat conducting portion 10 and twoelectrical connections 11. Theheat conducting portion 10 of the alternatingcurrent LED module 1 is combined with theheat conducting member 4. Theelectrical connections 11 of the alternatingcurrent LED module 1 are electrically connected with an external power supply (not shown) to electrically connect the alternatingcurrent LED module 1 to the external power supply. - The
heatsink housing 5 forms a porous structure with a great heat dissipation feature and a high specific surface area. The porous structure formed by theheatsink housing 5 is made of a nonmetallic powder (formed by an injection molding process) having a great heat conductivity, such as Al2O3, Zr2O, AIN, SiN, BN, WC, C, SiC, crystalline SiC, Recrystalline SiC (ReSiC) and the like. Preferably, the nonmetallic powder making the porous structure is AIN and SiC. Theheatsink housing 5 is formed to have the profile of a common lamp housing (or socket). Preferably, theheatsink housing 5 has a substantially semi-spherical profile. Theheatsink housing 5 has an end portion provided with a threadedstud 58 for mounting ametallic screw base 51, an insulatinggasket 52 and apower contact plate 53. Preferably, each of themetallic screw base 51, the insulatinggasket 52 and thepower contact plate 53 has an international specification of E-27, E-14 and the like. Themetallic screw base 51 and thepower contact plate 53 are electrically connected to theelectrical connections 11 of the alternatingcurrent LED module 1. - The
heat conducting member 4 is preferably made of a metal having a great heat conductivity, such as gold, silver, copper, iron, aluminum, cobalt, nickel, zinc, titanium, manganese and the like. Alternatively, theheat conducting member 4 is preferably made of a nonmetallic material having a great heat conductivity, such as A12O3; Zr2O, AIN, SiN, BN, WC, C, SiC, crystalline SiC, Recrystalline SiC (ReSiC) and the like. Preferably, the nonmetallic powder making the porous structure is AIN and SiC. - In operation, when the alternating
current LED module 1 is operated, the heat produced by the alternatingcurrent LED module 1 is transferred by the heat conduction and the heat convection between theheat conducting member 4 and theheatsink housing 5, so that the heat produced by the alternatingcurrent LED module 1 is carried away exactly and quickly so as to enhance the heat dissipation efficiency of the alternatingcurrent LED module 1. - As shown
Fig. 13 , the alternatingcurrent LED module 1 is combined with theheat conducting member 4 after assembly. - As shown
Fig. 15 , theheat conducting member 4 is directly integrally formed with the alternatingcurrent LED module 1. - As shown
Fig. 16 , theheat conducting member 4 is directly integrally formed on theheatsink housing 5 to form a metallicheat conducting layer 40 on theheatsink housing 5. - Referring to
Figs. 17 and18 , theheatsink housing 5 has a hollow inside provided with a receivingchamber 50 to receive the alternatingcurrent LED module 1 and theheat conducting member 4. - Referring to
Figs. 19-21 , the LED lamp further comprises two connecting pins 55 (with an international specification of MR16 and the like) electrically connected with theelectrical connections 11 of the alternatingcurrent LED module 1 and protruding outwardly from theheatsink housing 5 to electrically connect the alternatingcurrent LED module 1 to an external power supply (not shown). The LED lamp further comprises a mountingboard 58 mounted on theheatsink housing 5, and at least onereflective shade 56 mounted on the mountingboard 58 to encompass the at least one alternatingcurrent LED module 1. Thus, the LED lamp functions as a projection lamp to replace the traditional projection lamp. The mountingboard 58 has a plurality of ventilatingholes 59 connected to the receivingchamber 50 theheatsink housing 5 to provide a heat convection effect so as to enhance the heat dissipation efficiency of the alternatingcurrent LED module 1. Theheatsink housing 5 has a surface provided with a plurality ofheatsink grooves 57 to increase a heatsink surface area of theheatsink housing 5 so as to enhance the heat dissipation efficiency of theheatsink housing 5. - Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.
Claims (15)
- An LED (light emitting diode) lamp, comprising:a heatsink housing (2);an alternating current LED module (1) mounted in the heatsink housing;wherein the alternating current LED module includes a heat conducting portion (10) and two electrical connections (11);the heat conducting portion of the alternating current LED module is combined with the heatsink housing;the electrical connections of the alternating current LED module are electrically connected with an external power supply;the heatsink housing forms a nonmetallic porous structure with a great heat dissipation feature;the heatsink housing is formed to have the profile of a common lamp housing;the heatsink housing has a hollow inside provided with a receiving chamber (20) to receive the alternating current LED module.
- The LED lamp in accordance with claim 1, further comprising:a heat conducting plate (3) mounted between the heat conducting portion of the alternating current LED module and the heatsink housing;wherein the heat conducting plate is made of a metal having a great heat conductivity.
- The LED lamp in accordance with claim 2, further comprising:a conduction board (30) mounted between the heat conducting plate and the heatsink housing;wherein the conduction board is made of a metal having a great heat conductivity.
- The LED lamp in accordance with claim 1, wherein
the heatsink housing has an end portion provided with a threaded stud (28) for mounting a metallic screw base (21), an insulating gasket (22) and a power contact plate (23);
the metallic screw base and the power contact plate are electrically connected to the electrical connections of the alternating current LED module. - The LED lamp in accordance with claim 1, wherein the heatsink housing has a surface provided with a plurality of heatsink grooves (27) to increase a heatsink surface area of the heatsink housing.
- The LED lamp in accordance with claim 1, further comprising:two connecting pins (25) electrically connected with the electrical connections of the alternating current LED module and protruding outwardly from the heatsink housing;a reflective shade (26) mounted on the heatsink housing to encompass the alternating current LED module.
- An LED (light emitting diode) lamp, comprising:a heatsink housing (5);at least one alternating current LED module mounted in the heatsink housing;a heat conducting member (4) mounted on the heatsink housing;wherein the alternating current LED module includes a heat conducting portion and two electrical connections;the heat conducting portion of the alternating current LED module is combined with the heat conducting member;the electrical connections of the alternating current LED module are electrically connected with an external power supply;the heatsink housing forms a nonmetallic porous structure with a great heat dissipation feature;the heatsink housing is formed to have the profile of a common lamp housing.
- The LED lamp in accordance with claim 7, wherein the heat conducting member is directly integrally formed with the alternating current LED module.
- The LED lamp in accordance with claim 7, wherein the heat conducting member is directly integrally formed on the heatsink housing to form a metallic heat conducting layer on the heatsink housing.
- The LED lamp in accordance with claim 7, wherein the heatsink housing has a hollow inside provided with a receiving chamber to receive the alternating current LED module and the heat conducting member.
- The LED lamp in accordance with claim 7, wherein
the heatsink housing has an end portion provided with a threaded stud (5 8) for mounting a metallic screw base (51), an insulating gasket (52) and a power contact plate (53);
the metallic screw base and the power contact plate are electrically connected to the electrical connections of the alternating current LED module. - The LED lamp in accordance with claim 7, wherein the heatsink housing has a surface provided with a plurality of heatsink grooves (57) to increase a heatsink surface area of the heatsink housing.
- The LED lamp in accordance with claim 10, further comprising:two connecting pins (55) electrically connected with the electrical connections of the alternating current LED module and protruding outwardly from the heatsink housing.
- The LED lamp in accordance with claim 13, further comprising:a mounting board (58) mounted on the heatsink housing;at least one reflective shade (56) mounted on the mounting board to encompass the at least one alternating current LED module.
- The LED lamp in accordance with claim 14, wherein the mounting board has a plurality of ventilating holes (59) connected to the receiving chamber of the heatsink housing to provide a heat convection effect.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP09016067A EP2341275A1 (en) | 2009-12-29 | 2009-12-29 | LED lamp having higher efficiency |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP09016067A EP2341275A1 (en) | 2009-12-29 | 2009-12-29 | LED lamp having higher efficiency |
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Publication Number | Publication Date |
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EP2341275A1 true EP2341275A1 (en) | 2011-07-06 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP09016067A Withdrawn EP2341275A1 (en) | 2009-12-29 | 2009-12-29 | LED lamp having higher efficiency |
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EP2584246A1 (en) * | 2011-10-20 | 2013-04-24 | Chih-Shen Chou | High-efficiency light-emitting diode lamp |
CN106969297A (en) * | 2017-03-24 | 2017-07-21 | 成都佰思汇信科技有限责任公司 | A kind of LED Ceiling lights |
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US20060098440A1 (en) * | 2004-11-05 | 2006-05-11 | David Allen | Solid state lighting device with improved thermal management, improved power management, adjustable intensity, and interchangable lenses |
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