EP1995510A1 - LED lamp - Google Patents
LED lamp Download PDFInfo
- Publication number
- EP1995510A1 EP1995510A1 EP07252176A EP07252176A EP1995510A1 EP 1995510 A1 EP1995510 A1 EP 1995510A1 EP 07252176 A EP07252176 A EP 07252176A EP 07252176 A EP07252176 A EP 07252176A EP 1995510 A1 EP1995510 A1 EP 1995510A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- thermally
- heat sinks
- led
- conductive sleeve
- 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.)
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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
- 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
- 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
- F21K9/233—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 a spot light distribution, e.g. for substitution of reflector lamps
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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
- F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
- F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
- F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
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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 LED (light emitting diode) lamp, and more particularly to a LED lamp having a LED unit and a plurality of heat sinks surrounding the LED unit for efficiently dissipating the heat generated by the LED unit.
- projection lamps have a considerable market share among all of commercially available lamps. Especially, when various power-saving electronic lamps are used to replace traditional fluorescent lamps, the projection lamps still play an important role due to the fact that the projection lamps further providing a particular illuminating effect. For example, when decorating various house environments, exhibition places, showrooms, or restaurants, the projection lamps are inevitably used to create a mood for focusing on exhibited trade articles or decorations. Because the projection lamps have the considerable market share, various specifications of the projection lamps have been standardized. However, traditional projection lamps are generally halide projection lamps with a specification of 110 Volt, which results in increasing power consumption and generation of heat, so that the life span thereof is shortened relatively (only about several months). With the trend of higher and higher power rate, the traditional halide projection lamps are uneconomical and may cause an environmental issue; while the generated heat easily causes accidents such as cable fires.
- the traditional LED projection lamp designated by numeral 1 comprises an outer casing 11, a voltage conversion unit 12, and a LED unit 13.
- the LED unit 13 and the voltage conversion unit 12 are mounted in the outer casing 11.
- the voltage conversion unit 12 is used to convert an AC power of 110V into a DC power applied to the LED unit 13, so that the LED unit 13 can illuminate for a projection purpose.
- the traditional LED projection lamp 1 provides a power-saving advantage relative to the traditional halide projection lamp
- the traditional LED projection lamp 1 still has the foregoing problem of heat dissipation.
- the LED unit 13 must have a predetermined illumination in order to provide an effect of focusing on a spot target.
- the illumination of the LED unit 13 is continuously increasing with the advance of lamp technology, the heat-dissipation problem of the LED unit 13 is more and more serious.
- the LED unit 13 only has a lower heat-resistant property. Once an operation temperature is greater than a predetermined heat-resistant temperature of the LED unit 13, the illumination of the LED unit 13 will be gradually decreased, so that the LED unit 13 can no longer provide the predetermined illumination and the life span thereof will be shortened.
- the traditional LED projection lamp 1 has the heat-dissipation problem, the traditional LED projection lamp 1 is still not provided with any heat-dissipation structure for dissipating heat.
- the heat generated by the LED unit 13 can only be dissipated to the atmosphere by the outer casing 11 made of metal, so that the traditional LED projection lamp 1 only provides a relatively lower heat-dissipation efficiency.
- the traditional LED projection lamp 1 can only use the LED unit 13 with a maximum power specification up to 1 Watt due to the heat-dissipation problem, so that the total illumination of the traditional LED projection lamp 1 is limited and the traditional LED projection lamp 1 cannot be used to completely replace the traditional halide projection lamp.
- the traditional halide projection lamp with the higher power consumption and the more heat generation still has a considerable market share, which leads to unnecessary waste of the limited energy resources in the world.
- a primary object of the present invention is to provide a LED lamp, which is provided with a heat-dissipating module to substantially increase total heat-dissipating area, so as to improve and enhance the overall heat-dissipating efficiency.
- a secondary object of the present invention is to provide a LED lamp, which is provided with a heat-dissipating module having a plurality of heat sinks and a sheath for surrounding and positioning the heat sinks, so that the heat sinks are confined to ensure the operation safety and increase the structural strength of the heat-dissipating module.
- a third object of the present invention is to provide a LED lamp, which is provided with at least one LED unit for generating a light source and a cover member for evenly projecting the light source and providing a dust-proof effect.
- a fourth object of the present invention is to provide a LED lamp, which is provided with at least one LED unit for generating a light source, a metal base, and a light reflection member for reflecting and concentrating the light source, so as to prevent the loss of the light source and to cover the metal base for the purpose of decoration.
- LED lamp which comprises:
- the LED lamp further comprises at least one light reflection member received in the step portion formed on the central portion of the heat sinks of the heat-dissipating module and mounted on the base, wherein the light reflection member is provided with a curved focusing portion and a through hole formed on a central portion of the curved focusing portion, so that the LED unit mounted on the base is received in the through hole; and wherein the light reflection member is further provided with an engaging flange on an outer edge of the curved focusing portion for engaging with the cover member.
- the LED lamp designated by numeral 20 comprises at least one LED unit 21, a thermally-conductive sleeve 22, a heat-dissipating module 23, at least one metal base 24, at least one cover member 25, at least one light reflection member 26, a sheath 27, a foundation 28, and a printed circuit board (PCB) 29.
- the heat-dissipating module 23 is provided with a plurality of heat sinks 231.
- the thermally-conductive sleeve 22 is a hollow column having an upper end 221 and a lower end 222, wherein the upper end 221 is provided with at least one through hole 2211.
- the thermally-conductive sleeve 22 is preferably made of metal or alloy with a high thermal conductivity, such as iron, copper, aluminum, silver, gold, and their alloy.
- Each of the heat sinks 231 of the heat-dissipating module 23 has one end serially connected to each other and radially arranged on an outer periphery of the thermally-conductive sleeve 22, and the other end apart from each other, so as to constitute a circular structure of the heat-dissipating module 23. Furthermore, the heat sinks 231 are extended outward about a predetermined length in relation to the upper end 221 of the thermally-conductive sleeve 22. Each of the heat sinks 231 is formed with a step portion 232, while all of the step portions 232 are arranged coaxial to the thermally-conductive sleeve 22 and surrounding the upper end 221 thereof.
- the heat sinks 231 of the heat-dissipating module 23 are preferably made of metal or alloy with a high thermal conductivity, such as iron, copper, aluminum, silver, gold, and their alloy.
- the metal base 24 is used to mount the LED unit 21 thereon, while the metal base 24 is mounted in the step portions 232 formed on a central portion of the heat sinks 231. Moreover, the metal base 24 is further used to mount a plurality of electronic elements (not shown), such as ICs and capacitors, for adjusting the power of the LED unit 21. Especially, the metal base 24 is further used to dissipate heat generated by the LED unit 21 via the heat sinks 231 to the atmosphere during illuminating. Preferably, the metal base 24 is further provided with epoxy resin to prevent the electronic elements (ICs and capacitors) and the LED unit 21 from contacting with each other and leading to short circuit. In an alternative preferred embodiment of the present invention, the metal base 24 can be replaced by a plastic base made of a high heat-resistant plastic material.
- the cover member 25 is mounted in the step portion 232 formed on the central portion of the heat sink 231 of the heat-dissipating module 23, while the cover member 25 is above a light source projected by the LED unit 21, so as to evenly distribute the light source and to prevent from scattering.
- the cover member 25 is typically transparent or semitransparent member and can be selected from the group consisting of: a convex lens, a concave lens, a planar lens, and a light diffusion plate.
- the cover member 25 also seals the LED unit 21 into a hermetical compartment such that the LED unit 21 will not be damaged by rains or moistures of outside environment.
- the light reflection member 26 is received in the step portion 232 formed on the central portion of the heat sink 231 of the heat-dissipating module 23, and mounted on the metal base 24.
- the light reflection member 26 is provided with a curved focusing portion 261 and a through hole 2611 formed on a central portion of the curved focusing portion 261, so that the LED unit 21 mounted on the metal base 24 can be received in the through hole 2611.
- the light reflection member 26 covers the metal base 24, so as to provide a dust-proof effect and a decoration effect.
- the LED unit 21 is received in the through hole 2611 of the light reflection member 26 and mounted on the metal base 24, the light source projected by the LED unit 21 will not be scattered from a slit defined between any two of the heat sinks 231 of the heat-dissipating module 23, so as to improve and enhance the illuminating efficiency.
- the light reflection member 26 is provided with an engaging flange 2612 on an outer edge of the curved focusing portion 261 for engaging with the cover member 25.
- the sheath 27 is used to surround and position the upper outer rim of heat sinks 231, so that the heat sinks 231 are confined to ensure operation safety.
- the sheath 27 can be used to prevent from being cut by the sharp outer edge of the heat sinks 231.
- the user can easily exert a force upon the sheath 27 surrounding the heat sinks 231, and the sheath 27 can increase the structural strength of the heat-dissipating module 23 to protect the heat sinks 231 from being deformed or shifted by an external impact.
- the sheath 27 has a width of around 2mm ⁇ 10mm on both its upper and side surfaces and covers only the sharp outer edge of heat sinks 231. Therefore, most parts of heat sinks 231 remain exposed to the atmosphere such that the efficiency of heat dissipation won't be influenced by the sheath 27.
- the foundation 28 is a hollow housing provided with a curved opening 281 on an upper end thereof, wherein the curved opening 281 is used to position the heat sinks 231 surrounding the lower end 222 of the thermally-conductive sleeve 22.
- the PCB 29 comprises a circuit (not shown) therein, and is mounted in the foundation 28.
- the circuit of the PCB 29 is electrically connected to the LED unit 21 mounted on the metal base 24 via the through hole 2211 of the thermally-conductive sleeve 22.
- the PCB 29 is further provided with at least one terminal 291 and a voltage conversion unit 292.
- the terminal 291 is extended through the foundation 28 for being electrically connected an external power source (not shown) to the PCB 29 mounted in the foundation 28, while the voltage conversion unit 292 is used to convert an AC power of 110V or 220V from the external power source into a DC power applied to the LED unit 21, so that the LED unit 13 can illuminate for a projection purpose.
- the specification of the foundation 28 and the PCB 29 can be the same as that of traditional projection lamps for a projection purpose.
- the voltage conversion unit 292 is received inside the interior hollow portion of thermally-conductive sleeve 22 from the lower end 222 thereof.
- FIG. 4 an exploded perspective view of a LED lamp according to a second preferred embodiment of the present invention is illustrated and similar to the first preferred embodiment shown in Fig. 2 , so that some elements of the second preferred embodiment similar to that of the first preferred embodiment will be designated by the same numerals and the detailed description thereof will be omitted.
- the LED lamp of the second preferred embodiment of the present invention designated by numeral 20a further comprises a terminal housing 30 connected to another end (i.e. a lower end) of the foundation 28 opposite to the curved opening 281, wherein the terminal housing 30 is provided with an electrically conductive thread 31 formed on an outer periphery thereof for being electrically connected to the PCB 29, so that the electrically conductive thread 31 of the terminal housing 30 can be used to replace the terminal 291 of the PCB 29 of the first preferred embodiment shown in Fig. 2 .
- the specification of the foundation 28 and the terminal housing 30 can be corresponding to that of various metal screwing adapters of traditional tungsten lamps, such as adapter specifications of E10, E12, E 14, E 17, E27, or E40, wherein the number behind the letter "E” means the diameter of the metal screwing adapters.
- the specification of traditional household tungsten lamps is generally the E27 specification, i.e. the diameter of the metal screwing adapters thereof is 27 mm (or 2.7 cm).
- FIG. 5 an exploded perspective view of a LED lamp according to a third preferred embodiment of the present invention is illustrated and similar to the second preferred embodiment shown in Fig. 4 , so that similar elements will be designated by the same numerals and the detailed description thereof will be omitted.
- the LED lamp of the third preferred embodiment of the present invention designated by numeral 20b comprises a plurality of the LED units 21, and further comprises a thermally-conductive base 40 mounted in the step portion 232 of the heat-dissipating module 23.
- the thermally-conductive base 40 is provided with a plurality of positioning portions 41 corresponding to a plurality of the metal bases 24, so that each of the metal bases 24 respectively receives each of the LED units 21, while each of the metal bases 24 is respectively positioned in the positioning portions 41.
- the thermally-conductive base 40 is provided with a through hole 42 on a central portion thereof, so that the plurality of the metal bases 24 can be electrically connected to the PCB 29 in the foundation 28 via wires (not shown) extended through the through hole 42.
- the thermally-conductive base 40 has a lower surface attached to an upper edge of each of the heat sinks 231 located at the step portion 232 of the heat-dissipating module 23.
- the thermally-conductive base 40 can be used to increase a contact area between the metal bases 24 and the step portion 232 of the heat-dissipating module 23, and the heat sinks 231 can be used to improve the heat-dissipating efficiency of the metal bases 24 by speedily dissipating the heat thereof.
- the LED lamp 20b of the third preferred embodiment of the present invention omits the light reflection member 26, and only the thermally-conductive base 40 mounted in the step portion 232 of the heat-dissipating module 23 is used to support the plurality of the LED units 21 and the plurality of the metal bases 24.
- the common cover member 25 is used to evenly distribute the light source projected by all of the LED units 21 during the light source penetrates through the cover member 25, so that the LED lamp 20b will output an evenly distributed light source with a higher illumination.
- FIG. 6 an exploded perspective view of a LED lamp according to a fourth preferred embodiment of the present invention is illustrated and similar to the third preferred embodiment shown in Fig. 5 , so that similar elements will be designated by the same numerals and the detailed description thereof will be omitted.
- the LED lamp of the fourth preferred embodiment of the present invention designated by numeral 20c further comprises a plurality of the light reflection members 26 mounted on the plurality of the metal bases 24, respectively, wherein the LED units 21 are received in the through holes 2611 formed on the central portion of the curved focusing portion 261 of the light reflection members 26, respectively. Meanwhile, the plurality of the cover members 25 are engaged with the engaging flanges 2612 of the light reflection members 26, respectively.
- each of the LED units 21 is surrounded by the curved focusing portion 261 of the light reflection members 26, so that the light source projected by each of the LED units 21 in each of the curved focusing portion 261 can be focused by the curved focusing portion 261 of the light reflection member 26.
- each of the cover members 25 is used to respectively and evenly distribute the light sources projected by each of the LED units 21 during each of the light source penetrates through the corresponding cover member 25, so that the LED lamp 20c will focus and output a plurality of independently evenly distributed light sources projected by the plurality of the LED units 21.
- the LED lamp 20c of the fourth preferred embodiment of the present invention further comprises a protecting plate 50 provided with a plurality of positioning holes 51 thereon.
- the positioning holes 51 of the protecting plate 50 are used to position the cover members 25 and the light reflection members 26 therein. Meanwhile, a combination of the protecting plate 50, the cover members 25, and the light reflection members 26 is received in the step portions 232 of the heat-dissipating module 23, so that the step portions 232 of the heat-dissipating module 23 will be sealed by the combination thereof.
- the protecting plate 50 can precisely position the cover members 25 and the light reflection members 26, while providing a dust-proof effect for preventing the lamp from dusts or foreign matters, and a decoration effect for covering all electronic elements (not shown) in the LED lamp 20c.
- the protecting plate 50 can be made of a transparent material, and integrated with the plurality of the cover members 25 into one piece.
- FIG. 7 an exploded perspective view of a LED lamp according to a fifth preferred embodiment of the present invention is illustrated and similar to the third preferred embodiment shown in Fig. 5 , so that similar elements will be designated by the same numerals and the detailed description thereof will be omitted.
- the LED lamp of the fifth preferred embodiment of the present invention designated by numeral 20d has the following differences in design.
- the thermally-conductive base 401 shown in Fig. 7 is a metallic plate such as aluminum plate and is furnished with circuitries on the top surface thereof.
- the LED units 211 are bare LED integrated circuit (IC) chips which are directly mounted on and yet coupled with the circuitries of the thermally-conductive base 401. Because the LED units 211 in the form of bare LED IC chips are much smaller in size than the LED units 21 shown in Fig. 5 , therefore, it is possible to accommodate much more LED units 211 on a single thermally-conductive base 401.
- IC integrated circuit
- the LED units 211 are arranged in an array format and the amount thereof can be as many as eighty-four bare LED IC chips. Not only the illumination thereof is greatly improved, but also the heat generated by the LED units 211 can be dissipated efficiently by the combination of metallic thermally-conductive base 401, thermally-conductive sleeve 22 and heat-dissipating module 23.
- the voltage conversion unit 292 is received inside the interior hollow portion of thermally-conductive sleeve 22 from the lower end 222 thereof.
- the cover member 25 seals the LED unit 21 into a hermetical compartment formed between the cover member 25 and thermally-conductive base 401, such that the LED units 211 will not be damaged by rains or moistures coming from outside environment.
- Figs. 8A and 8B are respectively an exploded perspective view and an assembled perspective view of a LED lamp according to a sixth preferred embodiment of the present invention. Because most elements shown in Figs. 8A and 8B are similar to the fifth preferred embodiment shown in Fig. 7 , so that similar elements will be designated by the same numerals and the detailed description thereof will be omitted.
- the LED lamp of the sixth preferred embodiment of the present invention designated by numeral 20e has the following differences in design. Firstly, the foundation 28 shown in Figs. 8A and 8B has a larger and wider inner compartment than the one shown in Fig. 7 . Therefore, in the sixth preferred embodiment of Figs. 8A and 8B , the voltage conversion unit 292 is furnished on the bottom surface of PCB 29 and is received inside the foundation 28. Because the voltage conversion unit 292 in this sixth preferred embodiment is now received inside the foundation 28 instead of thermally-conductive sleeve 22, therefore the size and height of thermally-conductive sleeve 22 in this sixth preferred embodiment can be decreased vastly.
- the LED lamp 20e of this sixth preferred embodiment further comprises a heat dissipating plate 293 and a positioning plate 294.
- the heat dissipating plate 293 is made of metal such like aluminum, steel or copper and is in contact with the upper surface of the PCB 29, such that the heat generated by the voltage conversion unit 292 can be absorbed and dissipated by the heat dissipating plate 293.
- the outer rim of the heat dissipating plate 293 is formed with at least one recess 2931 which can mate with the vertical ribs 281 formed on the inner surface of foundation 28 in such a manner that the PCB 29 and voltage conversion unit 292 can be sandwiched between the heat dissipating plate 293 and the bottom of inner compartment of foundation 28.
- the positioning plate 294 is made of metal and is in contact with the upper surface of the heat dissipating plate 293.
- the outer rim of positioning plate 294 is also formed with a plurality of screw holes 2941 which are corresponding to the screw holes 282 formed on the inner surface of foundation 28.
- the outer rim of lower end 222 of thermally-conductive sleeve 22 is further formed with at least one locking pin 223 which can be mated with the locking slots 280 formed on the upper end of inner surface of foundation 28 in such a manner that the thermally-conductive sleeve 22 can be fixed to the upper end of foundation 28 by means of the mating of locking pin 223 and locking slots 280.
- each of the LED lamps 20, 20a, 20b, and 20c of the present invention is provided with the heat-dissipating module 23 constructed from the plurality of the heat sinks 231, wherein each of the heat sinks 231 has one end serially connected to each other and radially arranged on an outer periphery of the thermally-conductive sleeve 22, and the other end apart from each other, so as to constitute a circular and yet radiative structure of the heat-dissipating module 23.
- the sheath 27 is used to surround and position the heat sinks 231, so that the heat sinks 231 are confined to ensure the operation convenience and safety for being easily held by the user and preventing the user from being cut or injured by the sharp ends of heat sinks 231.
- the LED unit 21 is mounted on the metal base 24, while the metal base 24 is mounted in the step portions 232 formed on the central portion of the heat sinks 231.
- the light source projected by the LED unit 21 can be focused by the curved focusing portion 261 of the light reflection member 26, and followed by outputting the light source via the cover member 25.
- the heat generated by the LED unit 21 can be dissipated to the thermally-conductive sleeve 22 via the metal base 24, and then the heat will be dissipated from the thermally-conductive sleeve 22 to the heat sinks 231 of heat-dissipating module 23, so as to dissipate the heat to the atmosphere.
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- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
A LED lamp (20) includes at least one LED unit (21), a thermally-conductive sleeve (22), a heat-dissipating module (23), at least one metal base (24), at least one cover member (25), at least one light reflection member (26), a sheath (27), a foundation (28), and a printed circuit board (PCB) (29). The heat-dissipating module (23) is provided with a plurality of heat sinks (231), each of which has one end serially connected to each other and radially arranged on an outer periphery of the thermally-conductive sleeve (22), and the other end apart from each other, so as to constitute the heat-dissipating module (23). The sheath (27) is used to surround and position the heat sinks (231), so that the heat sinks are confined. The LED unit (21) is mounted on the metal base (24), which is received in a step portion (232) formed on a central portion of each of the heat sinks (231). The light reflection member (26) is provided with a curved focusing portion (261) for focusing a light source projected by the LED unit (21) following by outputting the light source via the cover member (25). The heat generated by the LED unit (21) can be dissipated to the thermally-conductive sleeve (22) via the metal base, and then the heat will be dissipated from the thermally-conductive sleeve (22) to the heat-dissipating module (23) constructed from the heat sinks (231) that are in contact with the thermally-conductive sleeve (22), so as to dissipate the heat to the atmosphere.
Description
- The present invention relates to a LED (light emitting diode) lamp, and more particularly to a LED lamp having a LED unit and a plurality of heat sinks surrounding the LED unit for efficiently dissipating the heat generated by the LED unit.
- Presently, projection lamps have a considerable market share among all of commercially available lamps. Especially, when various power-saving electronic lamps are used to replace traditional fluorescent lamps, the projection lamps still play an important role due to the fact that the projection lamps further providing a particular illuminating effect. For example, when decorating various house environments, exhibition places, showrooms, or restaurants, the projection lamps are inevitably used to create a mood for focusing on exhibited trade articles or decorations. Because the projection lamps have the considerable market share, various specifications of the projection lamps have been standardized. However, traditional projection lamps are generally halide projection lamps with a specification of 110 Volt, which results in increasing power consumption and generation of heat, so that the life span thereof is shortened relatively (only about several months). With the trend of higher and higher power rate, the traditional halide projection lamps are uneconomical and may cause an environmental issue; while the generated heat easily causes accidents such as cable fires.
- To solve the foregoing problems, related manufacturers further developed projection lamps having LEDs (light emitting diodes) as a power-saving light source, so as to replace the traditional halide projection lamps. Referring now to
Fig.1 , a schematic view of a traditional LED projection lamp is illustrated. The traditional LED projection lamp designated bynumeral 1 comprises anouter casing 11, avoltage conversion unit 12, and aLED unit 13. TheLED unit 13 and thevoltage conversion unit 12 are mounted in theouter casing 11. Thevoltage conversion unit 12 is used to convert an AC power of 110V into a DC power applied to theLED unit 13, so that theLED unit 13 can illuminate for a projection purpose. - However, although the traditional
LED projection lamp 1 provides a power-saving advantage relative to the traditional halide projection lamp, the traditionalLED projection lamp 1 still has the foregoing problem of heat dissipation. In other words, theLED unit 13 must have a predetermined illumination in order to provide an effect of focusing on a spot target. Although the illumination of theLED unit 13 is continuously increasing with the advance of lamp technology, the heat-dissipation problem of theLED unit 13 is more and more serious. Especially, in comparison with the traditional halide projection lamp, theLED unit 13 only has a lower heat-resistant property. Once an operation temperature is greater than a predetermined heat-resistant temperature of theLED unit 13, the illumination of theLED unit 13 will be gradually decreased, so that theLED unit 13 can no longer provide the predetermined illumination and the life span thereof will be shortened. - Even though the traditional
LED projection lamp 1 has the heat-dissipation problem, the traditionalLED projection lamp 1 is still not provided with any heat-dissipation structure for dissipating heat. The heat generated by theLED unit 13 can only be dissipated to the atmosphere by theouter casing 11 made of metal, so that the traditionalLED projection lamp 1 only provides a relatively lower heat-dissipation efficiency. Hence, the traditionalLED projection lamp 1 can only use theLED unit 13 with a maximum power specification up to 1 Watt due to the heat-dissipation problem, so that the total illumination of the traditionalLED projection lamp 1 is limited and the traditionalLED projection lamp 1 cannot be used to completely replace the traditional halide projection lamp. As a result, the traditional halide projection lamp with the higher power consumption and the more heat generation still has a considerable market share, which leads to unnecessary waste of the limited energy resources in the world. - It is therefore tried by the inventor to develop a LED lamp to solve the problems existing in the traditional LED projection lamp as described above.
- A primary object of the present invention is to provide a LED lamp, which is provided with a heat-dissipating module to substantially increase total heat-dissipating area, so as to improve and enhance the overall heat-dissipating efficiency.
- A secondary object of the present invention is to provide a LED lamp, which is provided with a heat-dissipating module having a plurality of heat sinks and a sheath for surrounding and positioning the heat sinks, so that the heat sinks are confined to ensure the operation safety and increase the structural strength of the heat-dissipating module.
- A third object of the present invention is to provide a LED lamp, which is provided with at least one LED unit for generating a light source and a cover member for evenly projecting the light source and providing a dust-proof effect.
- A fourth object of the present invention is to provide a LED lamp, which is provided with at least one LED unit for generating a light source, a metal base, and a light reflection member for reflecting and concentrating the light source, so as to prevent the loss of the light source and to cover the metal base for the purpose of decoration.
- In order to achieve the above mentioned objects, the present invention discloses an embodiment of light emitting diode (LED) lamp which comprises:
- at least one LED unit;
- a thermally-conductive sleeve being a column having an upper end and a lower end, wherein the upper end is provided with at least one through hole;
- a heat-dissipating module provided with a plurality of heat sinks, wherein each of the heat sinks has one end serially connected to each other and radially arranged on an outer periphery of the thermally-conductive sleeve, and the other end apart from each other, so as to constitute the heat-dissipating module; and wherein the heat sinks are extended outward about a predetermined length in relation to the upper end of the thermally-conductive sleeve, such that each of the heat sinks is formed with a step portion and all of the step portions are arranged coaxial to the thermally-conductive sleeve and surrounding the upper end thereof;
- at least one base for mounting the LED unit thereon, wherein the base is mounted in the step portions formed on a central portion of the heat sinks of the heat-dissipating module;
- at least one cover member mounted in the step portions formed on the central portion of the heat sinks of the heat-dissipating module for covering the LED unit;
- a sheath for surrounding and positioning the heat sinks of the heat-dissipating module, so that the heat sinks are confined by the sheath;
- a foundation being a hollow housing provided with an opening on an upper end thereof, wherein the opening positions the heat sinks surrounding the lower end of the thermally-conductive sleeve; and
- a printed circuit board (PCB) provided with a circuit, and mounted in the foundation, wherein the circuit of the PCB is electrically connected to the LED unit mounted on the base via the through hole of the thermally-conductive sleeve.
- In a preferred embodiment, the LED lamp further comprises at least one light reflection member received in the step portion formed on the central portion of the heat sinks of the heat-dissipating module and mounted on the base, wherein the light reflection member is provided with a curved focusing portion and a through hole formed on a central portion of the curved focusing portion, so that the LED unit mounted on the base is received in the through hole; and wherein the light reflection member is further provided with an engaging flange on an outer edge of the curved focusing portion for engaging with the cover member.
- The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein
-
Fig. 1 is a schematic view of a traditional LED projection lamp; -
Fig. 2 is an exploded perspective view of a LED lamp according to a first preferred embodiment of the present invention; -
Fig. 3 is an assembled perspective view of the LED lamp according to the first preferred embodiment of the present invention; -
Fig. 4 is an exploded perspective view of a LED lamp according to a second preferred embodiment of the present invention; -
Fig. 5 is an exploded perspective view of a LED lamp according to a third preferred embodiment of the present invention; and -
Fig. 6 is an exploded perspective view of a LED lamp according to a fourth preferred embodiment of the present invention. -
Fig. 7 is an exploded perspective view of a LED lamp according to a fifth preferred embodiment of the present invention. -
Fig. 8A is an exploded perspective view of a LED lamp according to a sixth preferred embodiment of the present invention. -
Fig. 8B is an assembled perspective view of a LED lamp according to the sixth preferred embodiment of the present invention. - Referring now to
Figs. 2 and3 , an exploded perspective view and an assembled perspective view of a LED (light emitting diode) lamp according to a first preferred embodiment of the present invention are illustrated. As shown, the LED lamp designated bynumeral 20 comprises at least oneLED unit 21, a thermally-conductive sleeve 22, a heat-dissipating module 23, at least onemetal base 24, at least onecover member 25, at least onelight reflection member 26, asheath 27, afoundation 28, and a printed circuit board (PCB) 29. The heat-dissipating module 23 is provided with a plurality ofheat sinks 231. - Referring still to
Figs. 2 and3 , in the first preferred embodiment of the present invention, the thermally-conductive sleeve 22 is a hollow column having anupper end 221 and alower end 222, wherein theupper end 221 is provided with at least one throughhole 2211. The thermally-conductive sleeve 22 is preferably made of metal or alloy with a high thermal conductivity, such as iron, copper, aluminum, silver, gold, and their alloy. Each of the heat sinks 231 of the heat-dissipatingmodule 23 has one end serially connected to each other and radially arranged on an outer periphery of the thermally-conductive sleeve 22, and the other end apart from each other, so as to constitute a circular structure of the heat-dissipatingmodule 23. Furthermore, theheat sinks 231 are extended outward about a predetermined length in relation to theupper end 221 of the thermally-conductive sleeve 22. Each of theheat sinks 231 is formed with astep portion 232, while all of thestep portions 232 are arranged coaxial to the thermally-conductive sleeve 22 and surrounding theupper end 221 thereof. The heat sinks 231 of the heat-dissipatingmodule 23 are preferably made of metal or alloy with a high thermal conductivity, such as iron, copper, aluminum, silver, gold, and their alloy. - Referring still to
Figs. 2 and3 , in the first preferred embodiment of the present invention, themetal base 24 is used to mount theLED unit 21 thereon, while themetal base 24 is mounted in thestep portions 232 formed on a central portion of theheat sinks 231. Moreover, themetal base 24 is further used to mount a plurality of electronic elements (not shown), such as ICs and capacitors, for adjusting the power of theLED unit 21. Especially, themetal base 24 is further used to dissipate heat generated by theLED unit 21 via theheat sinks 231 to the atmosphere during illuminating. Preferably, themetal base 24 is further provided with epoxy resin to prevent the electronic elements (ICs and capacitors) and theLED unit 21 from contacting with each other and leading to short circuit. In an alternative preferred embodiment of the present invention, themetal base 24 can be replaced by a plastic base made of a high heat-resistant plastic material. - Referring still to
Figs. 2 and3 again, in the first preferred embodiment of the present invention, thecover member 25 is mounted in thestep portion 232 formed on the central portion of theheat sink 231 of the heat-dissipatingmodule 23, while thecover member 25 is above a light source projected by theLED unit 21, so as to evenly distribute the light source and to prevent from scattering. Thecover member 25 is typically transparent or semitransparent member and can be selected from the group consisting of: a convex lens, a concave lens, a planar lens, and a light diffusion plate. In addition, thecover member 25 also seals theLED unit 21 into a hermetical compartment such that theLED unit 21 will not be damaged by rains or moistures of outside environment. - Referring still to
Figs. 2 and3 , in the first preferred embodiment of the present invention, thelight reflection member 26 is received in thestep portion 232 formed on the central portion of theheat sink 231 of the heat-dissipatingmodule 23, and mounted on themetal base 24. Thelight reflection member 26 is provided with a curved focusingportion 261 and a throughhole 2611 formed on a central portion of the curved focusingportion 261, so that theLED unit 21 mounted on themetal base 24 can be received in the throughhole 2611. As a result, the light source projected by theLED unit 21 can be focused by the curved focusingportion 261 of thelight reflection member 26. Furthermore, thelight reflection member 26 covers themetal base 24, so as to provide a dust-proof effect and a decoration effect. - Referring still to
Figs. 2 and3 , in the first preferred embodiment of the present invention, because theLED unit 21 is received in the throughhole 2611 of thelight reflection member 26 and mounted on themetal base 24, the light source projected by theLED unit 21 will not be scattered from a slit defined between any two of theheat sinks 231 of the heat-dissipatingmodule 23, so as to improve and enhance the illuminating efficiency. Furthermore, thelight reflection member 26 is provided with an engagingflange 2612 on an outer edge of the curved focusingportion 261 for engaging with thecover member 25. - Referring still to
Figs. 2 and3 , in the first preferred embodiment of the present invention, thesheath 27 is used to surround and position the upper outer rim ofheat sinks 231, so that theheat sinks 231 are confined to ensure operation safety. For example, when a user assembles (or detaches) theLED lamp 20, the user can hold thesheath 27 to prevent from being cut by the sharp outer edge of the heat sinks 231. Moreover, the user can easily exert a force upon thesheath 27 surrounding theheat sinks 231, and thesheath 27 can increase the structural strength of the heat-dissipatingmodule 23 to protect theheat sinks 231 from being deformed or shifted by an external impact. Thesheath 27 has a width of around 2mm~10mm on both its upper and side surfaces and covers only the sharp outer edge of heat sinks 231. Therefore, most parts ofheat sinks 231 remain exposed to the atmosphere such that the efficiency of heat dissipation won't be influenced by thesheath 27. - Referring still to
Figs. 2 and3 , in the first preferred embodiment of the present invention, thefoundation 28 is a hollow housing provided with acurved opening 281 on an upper end thereof, wherein thecurved opening 281 is used to position theheat sinks 231 surrounding thelower end 222 of the thermally-conductive sleeve 22. Furthermore, thePCB 29 comprises a circuit (not shown) therein, and is mounted in thefoundation 28. The circuit of thePCB 29 is electrically connected to theLED unit 21 mounted on themetal base 24 via the throughhole 2211 of the thermally-conductive sleeve 22. ThePCB 29 is further provided with at least oneterminal 291 and avoltage conversion unit 292. The terminal 291 is extended through thefoundation 28 for being electrically connected an external power source (not shown) to thePCB 29 mounted in thefoundation 28, while thevoltage conversion unit 292 is used to convert an AC power of 110V or 220V from the external power source into a DC power applied to theLED unit 21, so that theLED unit 13 can illuminate for a projection purpose. In the first preferred embodiment of the present invention, the specification of thefoundation 28 and thePCB 29 can be the same as that of traditional projection lamps for a projection purpose. In this embodiment, thevoltage conversion unit 292 is received inside the interior hollow portion of thermally-conductive sleeve 22 from thelower end 222 thereof. - Referring now to
Fig. 4 , an exploded perspective view of a LED lamp according to a second preferred embodiment of the present invention is illustrated and similar to the first preferred embodiment shown inFig. 2 , so that some elements of the second preferred embodiment similar to that of the first preferred embodiment will be designated by the same numerals and the detailed description thereof will be omitted. - Referring still to
Fig. 4 , in comparison with the first preferred embodiment, the LED lamp of the second preferred embodiment of the present invention designated by numeral 20a further comprises aterminal housing 30 connected to another end (i.e. a lower end) of thefoundation 28 opposite to thecurved opening 281, wherein theterminal housing 30 is provided with an electricallyconductive thread 31 formed on an outer periphery thereof for being electrically connected to thePCB 29, so that the electricallyconductive thread 31 of theterminal housing 30 can be used to replace theterminal 291 of thePCB 29 of the first preferred embodiment shown inFig. 2 . - Referring still to
Fig. 4 , in the second preferred embodiment of the present invention, the specification of thefoundation 28 and theterminal housing 30 can be corresponding to that of various metal screwing adapters of traditional tungsten lamps, such as adapter specifications of E10, E12, E 14, E 17, E27, or E40, wherein the number behind the letter "E" means the diameter of the metal screwing adapters. For example, the specification of traditional household tungsten lamps is generally the E27 specification, i.e. the diameter of the metal screwing adapters thereof is 27 mm (or 2.7 cm). - Referring now to
Fig. 5 , an exploded perspective view of a LED lamp according to a third preferred embodiment of the present invention is illustrated and similar to the second preferred embodiment shown inFig. 4 , so that similar elements will be designated by the same numerals and the detailed description thereof will be omitted. - Referring still to
Fig. 5 , in comparison with the second preferred embodiment, the LED lamp of the third preferred embodiment of the present invention designated by numeral 20b comprises a plurality of theLED units 21, and further comprises a thermally-conductive base 40 mounted in thestep portion 232 of the heat-dissipatingmodule 23. The thermally-conductive base 40 is provided with a plurality ofpositioning portions 41 corresponding to a plurality of themetal bases 24, so that each of themetal bases 24 respectively receives each of theLED units 21, while each of the metal bases 24 is respectively positioned in thepositioning portions 41. Furthermore, the thermally-conductive base 40 is provided with a throughhole 42 on a central portion thereof, so that the plurality of themetal bases 24 can be electrically connected to thePCB 29 in thefoundation 28 via wires (not shown) extended through the throughhole 42. Moreover, the thermally-conductive base 40 has a lower surface attached to an upper edge of each of theheat sinks 231 located at thestep portion 232 of the heat-dissipatingmodule 23. Because heat generated by theLED units 21 mounted on themetal bases 24 can be dissipated to the heat-dissipatingmodule 23 via the thermally-conductive base 40, the thermally-conductive base 40 can be used to increase a contact area between themetal bases 24 and thestep portion 232 of the heat-dissipatingmodule 23, and theheat sinks 231 can be used to improve the heat-dissipating efficiency of themetal bases 24 by speedily dissipating the heat thereof. - Referring still to
Fig. 5 , in comparison with the second preferred embodiment which thelight reflection member 26 is mounted on themetal base 24, theLED lamp 20b of the third preferred embodiment of the present invention omits thelight reflection member 26, and only the thermally-conductive base 40 mounted in thestep portion 232 of the heat-dissipatingmodule 23 is used to support the plurality of theLED units 21 and the plurality of the metal bases 24. Meanwhile, thecommon cover member 25 is used to evenly distribute the light source projected by all of theLED units 21 during the light source penetrates through thecover member 25, so that theLED lamp 20b will output an evenly distributed light source with a higher illumination. - Referring now to
Fig. 6 , an exploded perspective view of a LED lamp according to a fourth preferred embodiment of the present invention is illustrated and similar to the third preferred embodiment shown inFig. 5 , so that similar elements will be designated by the same numerals and the detailed description thereof will be omitted. - Referring still to
Fig. 6 , in comparison with the third preferred embodiment, the LED lamp of the fourth preferred embodiment of the present invention designated by numeral 20c further comprises a plurality of thelight reflection members 26 mounted on the plurality of themetal bases 24, respectively, wherein theLED units 21 are received in the throughholes 2611 formed on the central portion of the curved focusingportion 261 of thelight reflection members 26, respectively. Meanwhile, the plurality of thecover members 25 are engaged with the engagingflanges 2612 of thelight reflection members 26, respectively. As a result, each of theLED units 21 is surrounded by the curved focusingportion 261 of thelight reflection members 26, so that the light source projected by each of theLED units 21 in each of the curved focusingportion 261 can be focused by the curved focusingportion 261 of thelight reflection member 26. Meanwhile, each of thecover members 25 is used to respectively and evenly distribute the light sources projected by each of theLED units 21 during each of the light source penetrates through thecorresponding cover member 25, so that the LED lamp 20c will focus and output a plurality of independently evenly distributed light sources projected by the plurality of theLED units 21. - Referring still to
Fig. 6 , the LED lamp 20c of the fourth preferred embodiment of the present invention further comprises a protectingplate 50 provided with a plurality of positioning holes 51 thereon. The positioning holes 51 of the protectingplate 50 are used to position thecover members 25 and thelight reflection members 26 therein. Meanwhile, a combination of the protectingplate 50, thecover members 25, and thelight reflection members 26 is received in thestep portions 232 of the heat-dissipatingmodule 23, so that thestep portions 232 of the heat-dissipatingmodule 23 will be sealed by the combination thereof. As a result, the protectingplate 50 can precisely position thecover members 25 and thelight reflection members 26, while providing a dust-proof effect for preventing the lamp from dusts or foreign matters, and a decoration effect for covering all electronic elements (not shown) in the LED lamp 20c. In an alternative preferred embodiment of the present invention, the protectingplate 50 can be made of a transparent material, and integrated with the plurality of thecover members 25 into one piece. - Referring now to
Fig. 7 , an exploded perspective view of a LED lamp according to a fifth preferred embodiment of the present invention is illustrated and similar to the third preferred embodiment shown inFig. 5 , so that similar elements will be designated by the same numerals and the detailed description thereof will be omitted. - Referring still to
Fig. 7 , in comparison with the third preferred embodiment, the LED lamp of the fifth preferred embodiment of the present invention designated by numeral 20d has the following differences in design. Firstly, the thermally-conductive base 401 shown inFig. 7 is a metallic plate such as aluminum plate and is furnished with circuitries on the top surface thereof. Secondly, theLED units 211 are bare LED integrated circuit (IC) chips which are directly mounted on and yet coupled with the circuitries of the thermally-conductive base 401. Because theLED units 211 in the form of bare LED IC chips are much smaller in size than theLED units 21 shown inFig. 5 , therefore, it is possible to accommodate muchmore LED units 211 on a single thermally-conductive base 401. In this fifth embodiment as shown inFig. 7 , theLED units 211 are arranged in an array format and the amount thereof can be as many as eighty-four bare LED IC chips. Not only the illumination thereof is greatly improved, but also the heat generated by theLED units 211 can be dissipated efficiently by the combination of metallic thermally-conductive base 401, thermally-conductive sleeve 22 and heat-dissipatingmodule 23. In this embodiment, thevoltage conversion unit 292 is received inside the interior hollow portion of thermally-conductive sleeve 22 from thelower end 222 thereof. In addition, thecover member 25 seals theLED unit 21 into a hermetical compartment formed between thecover member 25 and thermally-conductive base 401, such that theLED units 211 will not be damaged by rains or moistures coming from outside environment. - Referring now to
Figs. 8A and8B , which are respectively an exploded perspective view and an assembled perspective view of a LED lamp according to a sixth preferred embodiment of the present invention. Because most elements shown inFigs. 8A and8B are similar to the fifth preferred embodiment shown inFig. 7 , so that similar elements will be designated by the same numerals and the detailed description thereof will be omitted. - Referring still to
Figs. 8A and8B , in comparison with the fifth preferred embodiment, the LED lamp of the sixth preferred embodiment of the present invention designated by numeral 20e has the following differences in design. Firstly, thefoundation 28 shown inFigs. 8A and8B has a larger and wider inner compartment than the one shown inFig. 7 . Therefore, in the sixth preferred embodiment ofFigs. 8A and8B , thevoltage conversion unit 292 is furnished on the bottom surface ofPCB 29 and is received inside thefoundation 28. Because thevoltage conversion unit 292 in this sixth preferred embodiment is now received inside thefoundation 28 instead of thermally-conductive sleeve 22, therefore the size and height of thermally-conductive sleeve 22 in this sixth preferred embodiment can be decreased vastly. Moreover, theLED lamp 20e of this sixth preferred embodiment further comprises aheat dissipating plate 293 and apositioning plate 294. Theheat dissipating plate 293 is made of metal such like aluminum, steel or copper and is in contact with the upper surface of thePCB 29, such that the heat generated by thevoltage conversion unit 292 can be absorbed and dissipated by theheat dissipating plate 293. The outer rim of theheat dissipating plate 293 is formed with at least onerecess 2931 which can mate with thevertical ribs 281 formed on the inner surface offoundation 28 in such a manner that thePCB 29 andvoltage conversion unit 292 can be sandwiched between theheat dissipating plate 293 and the bottom of inner compartment offoundation 28. Thepositioning plate 294 is made of metal and is in contact with the upper surface of theheat dissipating plate 293. The outer rim ofpositioning plate 294 is also formed with a plurality ofscrew holes 2941 which are corresponding to the screw holes 282 formed on the inner surface offoundation 28. By using screws to screw over the screw holes 2941 and screwholes 282, theheat dissipating plate 293 andPCB 29 can be fixed firmly within the inner compartment offoundation 28. The outer rim oflower end 222 of thermally-conductive sleeve 22 is further formed with at least onelocking pin 223 which can be mated with the lockingslots 280 formed on the upper end of inner surface offoundation 28 in such a manner that the thermally-conductive sleeve 22 can be fixed to the upper end offoundation 28 by means of the mating of lockingpin 223 and lockingslots 280. - As described above, each of the
LED lamps module 23 constructed from the plurality of theheat sinks 231, wherein each of the heat sinks 231 has one end serially connected to each other and radially arranged on an outer periphery of the thermally-conductive sleeve 22, and the other end apart from each other, so as to constitute a circular and yet radiative structure of the heat-dissipatingmodule 23. Moreover, thesheath 27 is used to surround and position theheat sinks 231, so that theheat sinks 231 are confined to ensure the operation convenience and safety for being easily held by the user and preventing the user from being cut or injured by the sharp ends of heat sinks 231. Moreover, theLED unit 21 is mounted on themetal base 24, while themetal base 24 is mounted in thestep portions 232 formed on the central portion of the heat sinks 231. As a result, the light source projected by theLED unit 21 can be focused by the curved focusingportion 261 of thelight reflection member 26, and followed by outputting the light source via thecover member 25. Furthermore, the heat generated by theLED unit 21 can be dissipated to the thermally-conductive sleeve 22 via themetal base 24, and then the heat will be dissipated from the thermally-conductive sleeve 22 to theheat sinks 231 of heat-dissipatingmodule 23, so as to dissipate the heat to the atmosphere. - The present invention has been described with a preferred embodiment thereof and it is understood that many changes and modifications to the described embodiment can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.
Claims (10)
- A light emitting diode (LED) lamp, comprising:at least one LED unit;a thermally-conductive sleeve having an upper end and a lower end, wherein the upper end is provided with at least one through hole;a heat-dissipating module provided with a plurality of heat sinks, wherein each of the heat sinks has one end serially connected to each other and radially arranged on an outer periphery of the thermally-conductive sleeve, and the other end apart from each other, so as to constitute the heat-dissipating module; and wherein the heat sinks are extended outward about a predetermined length in relation to the upper end of the thermally-conductive sleeve, such that each of the heat sinks is formed with a step portion and all of the step portions are arranged coaxial to the thermally-conductive sleeve and surrounding the upper end thereof;at least one base for mounting the LED unit thereon, wherein the base is mounted in the step portions formed on a central portion of the heat sinks of the heat-dissipating module;at least one cover member mounted in the step portions formed on the central portion of the heat sinks of the heat-dissipating module for covering the LED unit;a sheath for surrounding and positioning the heat sinks of the heat-dissipating module, so that the heat sinks are confined by the sheath;a foundation being a hollow housing provided with an opening on an upper end thereof, wherein lower ends of the heat sinks and lower end of the thermally-conductive sleeve are positioned on the upper end of foundation; anda printed circuit board (PCB) provided with a circuit, and mounted in the foundation, wherein the circuit of the PCB is electrically connected to the LED unit mounted on the base via the through hole of the thermally-conductive sleeve.
- The LED lamp of claim 1, further comprising at least one light reflection member received in the step portion formed on the central portion of the heat sinks of the heat-dissipating module and mounted on the base, wherein the light reflection member is provided with a curved focusing portion and a through hole formed on a central portion of the curved focusing portion, so that the LED unit mounted on the base is received in the through hole; and wherein the light reflection member is further provided with an engaging flange on an outer edge of the curved focusing portion for engaging with the cover member.
- The LED lamp of claim 1, wherein the cover member is selected from the group consisting of a convex lens, a concave lens, a planar lens, and a light diffusion plate.
- The LED lamp of claim 1, further comprising a thermally-conductive base mounted in the step portion of the heat-dissipating module, wherein the thermally-conductive base is provided with at least one positioning portion corresponding to the at least one bases, so that the bases is positioned in the positioning portion.
- The LED lamp of claim 1, wherein the PCB further comprises at least one terminal extended through the foundation for being electrically connected to the PCB mounted in the foundation.
- The LED lamp of claim 1, further comprising a terminal housing connected to an end of the foundation opposite to the opening of the foundation, wherein the terminal housing is provided with an electrically conductive thread formed on an outer periphery thereof for being electrically connected to the PCB.
- The LED lamp of claim 1, wherein the PCB further comprises a voltage conversion unit for converting an AC power into a DC power.
- The LED lamp of claim 2, further comprising a protecting plate provided with at least one positioning hole thereon for positioning the at least one light reflection member therein, and a combination of the protecting plate and the light reflection member is received in the step portions of the heat-dissipating module, so that the step portions is sealed.
- A light emitting diode (LED) lamp, comprising:at least one LED unit;a thermally-conductive sleeve having an upper end and a lower end, wherein the upper end is provided with at least one through hole;a heat-dissipating module provided with a plurality of heat sinks, wherein each of the heat sinks has one end serially connected to each other and radially arranged on an outer periphery of the thermally-conductive sleeve, and the other end apart from each other, so as to constitute the heat-dissipating module; and wherein the heat sinks are extended outward about a predetermined length in relation to the upper end of the thermally-conductive sleeve, such that each of the heat sinks is formed with a step portion and all of the step portions are arranged coaxial to the thermally-conductive sleeve and surrounding the upper end thereof;at least one thermally-conductive base for mounting the at least one LED unit thereon, wherein the thermally-conductive base is mounted in the step portions of the heat sinks of the heat-dissipating module;at least one cover member mounted on the step portions of the heat sinks for covering the at least one LED unit;a foundation being a hollow housing provided with an opening on an upper end thereof, wherein lower ends of the heat sinks and lower end of the thermally-conductive sleeve are positioned on the upper end of foundation; anda printed circuit board (PCB) located between the foundation and thermally-conductive sleeve, wherein the PCB is electrically connected to the at least one LED unit via the through hole of the thermally-conductive sleeve.
- The LED lamp of claim 9, wherein the thermally-conductive base is a metallic plate and is furnished with circuitries on a top surface thereof; the at least one LED unit includes a plurality of bare LED IC chips which are directly mounted on and yet coupled with the circuitries of the thermally-conductive base.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07252176A EP1995510A1 (en) | 2007-05-25 | 2007-05-25 | LED lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP07252176A EP1995510A1 (en) | 2007-05-25 | 2007-05-25 | LED lamp |
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EP1995510A1 true EP1995510A1 (en) | 2008-11-26 |
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EP07252176A Withdrawn EP1995510A1 (en) | 2007-05-25 | 2007-05-25 | LED lamp |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011085146A3 (en) * | 2010-01-11 | 2011-11-10 | General Electric Company | Compact light-mixing led light engine and white led lamp with narrow beam and high cri using same |
DE102011113653A1 (en) * | 2011-09-19 | 2013-03-21 | Rüdiger Lanz | High power LED spot light for illuminating e.g. ceiling of building, has connection body formed on reflector body unit and causing sealing of spot light, and seals arranged between base cooling body and reflector body unit |
KR101407687B1 (en) * | 2013-07-02 | 2014-06-13 | 주식회사 이디엠아이 | Large LED lamp with excellent heat dissipation effect |
US9182110B2 (en) | 2011-09-23 | 2015-11-10 | Koninklijke Philips N.V. | Lighting device with a circuit board mounting |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030137838A1 (en) * | 2000-05-08 | 2003-07-24 | Alexander Rizkin | Highly efficient LED lamp |
DE202004004570U1 (en) * | 2004-03-10 | 2004-05-27 | Conrad Electronic Gmbh | Light source for lamp for replacing e.g. halogen lamps etc. with housing containing at least one light emitting diode (LED), which is fitted on cooling member for waste heat connection, coupled to housing |
DE202006009553U1 (en) * | 2006-06-16 | 2006-08-31 | Chien, Chen-Chun, Sansia | Light-emitting diode module for vehicle headlamps, includes heat sink surrounding and dissipating heat from main body, with radial fins shaped to fit inside headlamp housing |
WO2006128327A1 (en) * | 2005-06-03 | 2006-12-07 | Neobulb Technologies, Inc. | A semiconductor light-emitting apparatus provided with a heat conducting/dissipating module |
-
2007
- 2007-05-25 EP EP07252176A patent/EP1995510A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030137838A1 (en) * | 2000-05-08 | 2003-07-24 | Alexander Rizkin | Highly efficient LED lamp |
DE202004004570U1 (en) * | 2004-03-10 | 2004-05-27 | Conrad Electronic Gmbh | Light source for lamp for replacing e.g. halogen lamps etc. with housing containing at least one light emitting diode (LED), which is fitted on cooling member for waste heat connection, coupled to housing |
WO2006128327A1 (en) * | 2005-06-03 | 2006-12-07 | Neobulb Technologies, Inc. | A semiconductor light-emitting apparatus provided with a heat conducting/dissipating module |
DE202006009553U1 (en) * | 2006-06-16 | 2006-08-31 | Chien, Chen-Chun, Sansia | Light-emitting diode module for vehicle headlamps, includes heat sink surrounding and dissipating heat from main body, with radial fins shaped to fit inside headlamp housing |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011085146A3 (en) * | 2010-01-11 | 2011-11-10 | General Electric Company | Compact light-mixing led light engine and white led lamp with narrow beam and high cri using same |
US8613530B2 (en) | 2010-01-11 | 2013-12-24 | General Electric Company | Compact light-mixing LED light engine and white LED lamp with narrow beam and high CRI using same |
US9534743B2 (en) | 2010-01-11 | 2017-01-03 | GE Lighting Solutions, LLC | Directional lamp with beam forming optical system including a lens and collecting reflector |
DE102011113653A1 (en) * | 2011-09-19 | 2013-03-21 | Rüdiger Lanz | High power LED spot light for illuminating e.g. ceiling of building, has connection body formed on reflector body unit and causing sealing of spot light, and seals arranged between base cooling body and reflector body unit |
DE102011113653B4 (en) * | 2011-09-19 | 2016-02-18 | Rüdiger Lanz | LED high-power spotlight |
US9182110B2 (en) | 2011-09-23 | 2015-11-10 | Koninklijke Philips N.V. | Lighting device with a circuit board mounting |
RU2608566C2 (en) * | 2011-09-23 | 2017-01-23 | Филипс Лайтинг Холдинг Б.В. | Lighting device with printed circuit board holder |
KR101407687B1 (en) * | 2013-07-02 | 2014-06-13 | 주식회사 이디엠아이 | Large LED lamp with excellent heat dissipation effect |
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