WO2009005314A2 - Shade exchangeable led bulb - Google Patents

Shade exchangeable led bulb Download PDF

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Publication number
WO2009005314A2
WO2009005314A2 PCT/KR2008/003925 KR2008003925W WO2009005314A2 WO 2009005314 A2 WO2009005314 A2 WO 2009005314A2 KR 2008003925 W KR2008003925 W KR 2008003925W WO 2009005314 A2 WO2009005314 A2 WO 2009005314A2
Authority
WO
WIPO (PCT)
Prior art keywords
emitting
shade
light
diode
led
Prior art date
Application number
PCT/KR2008/003925
Other languages
French (fr)
Other versions
WO2009005314A3 (en
Inventor
Sam-Pyo Hong
Original Assignee
Sam-Pyo Hong
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sam-Pyo Hong filed Critical Sam-Pyo Hong
Publication of WO2009005314A2 publication Critical patent/WO2009005314A2/en
Publication of WO2009005314A3 publication Critical patent/WO2009005314A3/en

Links

Classifications

    • 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
    • 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
    • F21V1/00—Shades for light sources, i.e. lampshades for table, floor, wall or ceiling lamps
    • 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
    • F21K9/238—Arrangement or mounting of circuit elements integrated in the light source
    • 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
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/16—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting
    • F21V17/164—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening by deformation of parts; Snap action mounting the parts being subjected to bending, e.g. snap joints
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/001—Arrangement of electric circuit elements in or on lighting devices the elements being electrical wires or cables
    • F21V23/002—Arrangements of cables or conductors inside a lighting device, e.g. means for guiding along parts of the housing or in a pivoting arm
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F21V23/004—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board
    • F21V23/006—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array arranged on a substrate, e.g. a printed circuit board the substrate being distinct from the light source holder
    • 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
    • F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
    • F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
    • 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
    • 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
    • F21V29/83—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks the elements having apertures, ducts or channels, e.g. heat radiation holes
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/06—Arrangement of electric circuit elements in or on lighting devices the elements being coupling devices, e.g. connectors
    • 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, in general, to a light emitting diode (LED) bulb, and more particularly, to an LED bulb capable of efficiently radiating heat generated from an LED.
  • LED light emitting diode
  • LED lighting apparatuses adopt an LED light source unlike conventional lighting apparatuses which do not.
  • conventional lighting apparatuses such as incandescent bulbs, tungsten bulbs, halogen bulbs, and so on are weeded out, the LED bulbs are becoming much more widely used.
  • the LED lighting apparatuses have various advantages such as low power consumption, an inexpensive cost of operation, inexpensive maintenance expenses, a long lifespan, and high light efficiency. Further, the LED lighting apparatuses have other advantages such as stable operation, easy installation, and excellent reliability.
  • FIG. 5 is a front view illustrating a conventional LED bulb
  • FIG. 6 is a cross- sectional view illustrating an interior of the conventional LED bulb of FIG. 5.
  • the conventional LED bulb 200 includes a lens or cover
  • the metal LED board 9 is spaced apart from the power board 206 by a predetermined distance 205 so as to be less influenced by the heat.
  • the power LED is mounted on the metal PCB.
  • the bulb body is made of aluminum having good thermal conductivity, and is coupled with a heat sink having a comb shape so as to increase the contact area with the air and so to dissipate heat.
  • the board of a circuit for supplying current or voltage to the LED is spaced apart by a predetermined distance, thereby reducing malfunction and the temperature influence on a semiconductor device as caused by the heat generated from the metal PCB.
  • the PCB in order to radiate the heat generated from the power LED, and the comb-shaped heat sink for dissipating the heat is located outside the LED bulb.
  • the heat sink becomes bulky, degrading the geometrical beauty of the LED bulb. Furthermore, the heat sink is made of aluminum or die cast aluminum in order to obtain high heat radiation efficiency, thereby considerably increasing production costs.
  • the volume of the LED bulb is also increased to lessen mechanical incompatibility with an existing incandescent bulb or an existing compact fluorescent lamp (CFL)
  • the spacing distance 205 caused by the heat is dependent on characteristics of the power LED such as consumption power.
  • the power LED is not standardized. This is responsible for very low applicability.
  • the LED bulb may be designed to have the spacing distance of 1 cm or more, and then a different standard of power LED may be applied to the LED bulb. In this case, the power LEDs have different temperature characteristics, and the LED bulb must be again designed to change the spacing distance of 1 cm or more.
  • LED bulb is degraded, and dust easily becomes deposited in gaps between the fins.
  • the amount of dust is gradually increased, the geometrical beauty of the LED bulb becomes spoiled. In the worst case, there is a possibility of fire.
  • the present invention has been made in an effort to solve the problems occurring in the related art, and an embodiment of the present invention provides a light emitting diode (LED) bulb, capable of eliminating the problem of a heat sink occupying a wide area due to the high-temperature heat present in a conventional LED bulb, and capable of reducing the volume and size of the heat radiating metal as well as reducing the overall volume and size of plastic bulb material, thus reducing production costs.
  • LED light emitting diode
  • Another embodiment of the present invention provides an LED bulb, capable of solving the problem of the geometrical beauty thereof being degraded due to the heat sink having protruding fins, dust becoming easily deposited in gaps between the fins, and the amount of the dust gradually increasing and leading to a possibility of fire.
  • Another embodiment of the present invention provides an LED bulb, capable of solving a problem whereby an infrared receiver mounted on the LED bulb is influenced by an infrared ray component included in heat generated from an LED, thereby causing malfunctioning of the infrared receiver.
  • an exchangeable shade for a light-emitting-diode bulb which comprises: a metal light-emitting-diode board having at least one light emitting diode and thermal conductivity; a transparent or translucent shade collecting and diffusing light emitted from the light emitting diode; a metal structure having the same shape as the metal light-emitting-diode board, and including a coupling recess for close coupling with the metal light-emitting-diode board, and a primary fastening step fastened to the shade in order to couple with or decouple from the shade, and provided on an outer circumference of the exchangeable shade light-emitting-diode bulb; a body coupled with the metal structure and provided on the outer circumference of the exchangeable shade light-emitting-diode bulb; and a control board connected with the metal light-emitting-diode board through a wire in
  • the metal structure includes at least one heat sink on a side opposite the coupling recess in a comb shape.
  • control board includes a primary hole providing a hot air channel to the body.
  • control board includes elements for controlling the driving of the light emitting diode on a side which is opposite a lower side of the metal structure.
  • the metal structure includes a secondary fastening step fastened to the body in order to couple and decouple the body.
  • the metal structure includes a wire passage through which a wire connecting the metal light-emitting-diode board with the control board passes.
  • the exchangeable shade light- emitting-diode bulb further comprises a power supply board receiving alternate current voltage from outside, converting alternate current voltage into direct current voltage, and supplying the direct current voltage to the control board.
  • the power supply board includes a secondary hole providing the hot air channel to the body.
  • the power supply board includes a transformer that converts alternate current voltage into direct current voltage and is located on a side opposite a lower side of the metal structure.
  • the metal structure is made of aluminum or die cast aluminum.
  • the body includes an infrared receiving hole, which receives infrared control signals for controlling the on/off state and color and brightness of the LED, on one side of the body at a lower end of the metal structure.
  • the body includes at least one ventilation hole below the control board.
  • the LED bulb has a remarkably excellent heat radiative ability by virtue of the complex configuration thereof, as compared to a conventional LED bulb.
  • the influence which the heat generated from the LED of the LED bulb exerts on the control board, the power supply board, etc. can be reduced to further improve lifespan, stability, etc. of the LED electrodes.
  • the LED bulb eliminates the problem of the conventional LED bulb wherein the heat sink occupies a wide area due to the presence of high-temperature heat.
  • the LED bulb can have a small size to provide aesthetic excellence, have a reduced cost of production, and offer mechanical compatibility with an existing incandescent bulb, an existing three-wavelength bulb, or the like.
  • the LED bulb can solve problems of degradation in the geometrical beauty in conventional LED bulbs due to a heat sink having protuding fins, wherein further, dust becomes deposited in gaps between the fins, the amount of dust deposited gradually increasing and leading to a possibility of fire.
  • the LED bulb can solve a problem in that when an infrared receiver is mounted on the LED bulb, an infrared ray component of the heat generated from an LED exerts an influence on the infrared receiver, causing it to malfunction.
  • the LED bulb can easily couple or decouple to a separate shade, and thus produce various visual effects suitable to the tastes of a user.
  • FIG. 1 is a front view illustrating an exchangeable shade light emitting diode (LED) bulb according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view illustrating an exchangeable shade LED bulb according to an embodiment of the present invention
  • FIG. 3 is an exploded view illustrating an exchangeable shade LED bulb according to an embodiment of the present invention
  • FIG. 4 is a cross-sectional view illustrating a metal structure according to an embodiment of the present invention
  • FIG. 5 is a front view illustrating a conventional LED bulb
  • FIG. 6 is a cross-sectional view illustrating an interior of the conventional LED bulb of FIG. 5.
  • FIG. 1 is a front view illustrating an exchangeable shade light emitting diode (LED) bulb according to an embodiment of the present invention.
  • the exchangeable shade LED bulb 100 according to an embodiment of the present invention includes a detachable shade 1, a metal structure 2, an infrared receiving hole 3, a body 4, a ventilation hole 5, a base 6, and a connecting electrode 7.
  • the detachable shade 1 can collect or diffuse light, particularly light emitted from an
  • LED and be formed of transparent or translucent material.
  • the metal structure 2 is provided on an outer circumference of the LED bulb 100, and serves to radiate heat generated from the LED.
  • the metal structure 2 can be made of an arbitrary metal having good thermal conductivity, for instance aluminum or die cast aluminum.
  • the infrared receiving hole 3 receives infrared rays, and particularly infrared control signals for controlling the on/off state, color and brightness of the LED.
  • the body 4 is coupled with the metal structure 2, and is provided on the outer circumference of the LED bulb 100.
  • the ventilation hole 5 is installed under the body 4, and can further improve heat radiating ability in addition to the metal structure 2 having the main heat radiating function.
  • the base 6 and the connecting electrode 7 are parts which are coupled to a bulb socket and to which alternate current voltage is applied.
  • FIG. 2 is a cross-sectional view illustrating an exchangeable shade LED bulb according to an embodiment of the present invention
  • FIG. 3 is an exploded view illustrating an exchangeable shade LED bulb according to an embodiment of the present invention.
  • At least one LED 8 is installed on a metal LED board 9 made of thermal conductive material.
  • the LED 8 is soldered to the thermal conductive metal LED board 9, so that the heat can be transmitted and radiated to the metal LED board 9.
  • FIG. 4 is a cross-sectional view illustrating a metal structure according to an embodiment of the present invention.
  • the metal structure 2 includes a coupling recess 25, a primary fastening step 26, a secondary fastening step 12, and a heat sink 13.
  • the coupling recess 25 of the metal structure 2 has the same shape as the metal LED board 9, so that it can be coupled closely with the metal LED board 9. This coupling can be performed on a rear surface of the metal LED board 9, for instance, by an adhering means.
  • the metal LED board 9 is accurately placed in the coupling recess, so that a contact area thereof can be increased to more efficiently transmit and diffuse heat.
  • the high-temperature heat generated from the LED 8 is more rapidly transmitted to and absorbed by the metal structure 2, resulting in increased diffusion and radiation of the heat.
  • heat transfer efficiency is increased to increase the heat radiation area.
  • at least one heat sink 13 is formed at a lower end of the metal structure 2, for instance, in a comb shape, and an outer surface of the metal structure 2 is in direct contact with air, so that the heat radiation effect is compounded. As such, a size of the metal structure 2 can be further reduced, and thus the overall size of the LED bulb 100 can be reduced.
  • the metal structure 2 has the primary fastening step 26 and the secondary fastening step 12, so that it can be easily coupled to and decoupled from the detachable shade 1 and the body 4, respectively.
  • the primary fastening step 26 is fastened to the shade 1 in order to couple and decouple the shade 1
  • the secondary fastening step 12 is fastened to the body 4 in order to couple and decouple the body 4.
  • the shade 1 is pushed toward the primary fastening step 26, and is thus hooked on the primary fastening step 26 formed in the metal structure 2. Thereby, the shade 1 can be easily coupled. In this manner, a user can interchange various shades so as to make them suitable according to purpose and taste. Alternately, in the case in which the shade 1 is to be decoupled, the shade 1 is pulled weakly, and is easily decoupled.
  • the body 4 can be easily decoupled from the metal structure 2 by the secondary fastening step 12. Thereby, the LED bulb 100 may easily be cleaned and repaired.
  • the infrared receiver 14 receives infrared control signals for controlling the on/off state, color and brightness of the LED 8 through the infrared receiving hole 3.
  • the control board 15 controls the on/off state, the color and the brightness of at least one LED 8 on the basis of the received infrared control signals.
  • a wire 10 is connected to a connector hole 21 of the metal LED board 9 by soldering.
  • the wire 10 is connected to the control board 15 through a wire passage 11 formed in the metal structure 2.
  • control board 15 Since the control board 15 receives a considerable amount of heat from the metal structure 2, the control board 15 is formed with a primary hole 22 in the center thereof which reduces the influence of the heat and forms a separate channel for high- temperature air to flow through. Thereby, the flow of air becomes smooth, increasing the radiative effect.
  • the infrared receiver 14 for operating the control board 15 from a remote distance is attached to the lower end of the metal structure 2. Thereby, when the LED 8 is operated, the infrared receiver is influenced only slightly by infrared radiation components caused by high-temperature heat, thus reducing malfunction.
  • elements, which are installed on the control board 15 and control operation of the LED 8, are preferably located on the side opposite the metal structure 2.
  • control board 15 In the case in which the control board 15 is configured to have a circuit that is directly supplied with alternate current voltage, the control board 15 requires a lot of parts, and thus becomes larger. Accordingly, as a means for coping with this problem, a separate power supply board 17 including a transformer 20 converting alternate current voltage into direct current voltage is installed on the lower end of the LED bulb. The control board 15 is connected with the power supply board 17 through a connector 16.
  • the power supply board 17 is hooked on a guide structure 18 of the body 4.
  • the power supply board 17 is configured to convert alternate current voltage into direct current voltage, thereby outputting direct current voltage of, for instance, 30V or less.
  • direct current voltage for instance, 30V or less.
  • the base 6 and the electrode 7 are connected with a connecting hole 23 of the power supply board 17 via a wire 19, and thus the alternate current voltage is supplied through the wire.
  • the power supply board 17 further includes a secondary hole 24 so as to reduce accumulation of the heat in the body 4, and to make the flow of air smooth, so that the heat radiation can be improved more effectively.
  • the elements, including the transformer 20 that is installed on the power supply board 17 and converts the alternate current voltage into direct current voltage are preferably located on the side opposite the metal structure 2.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

An exchangeable shade light emitting diode (LED) bulb including a metal LED board having at least one LED and thermal conductivity, a transparent or translucent shade for collecting or diffusing light emitted from the LED, a metal structure having the same shape as the metal LED board, and including a coupling recess for close coupling with the metal LED board, and a primary fastening step fastened to the shade in order to couple with or decouple from the shade, and the metal structure forming an outer circumference of the exchangeable shade LED bulb, a body coupled with the metal structure and forming the outer circumference of the exchangeable shade LED bulb, and a control board connected with the metal LED board through a wire in order to drive the LED bulb, spaced apart from the metal LED board, and controlling color and brightness of the LED.

Description

Description SHADE EXCHANGEABLE LED BULB
Technical Field
[1] The present invention relates, in general, to a light emitting diode (LED) bulb, and more particularly, to an LED bulb capable of efficiently radiating heat generated from an LED. Background Art
[2] Light emitting diode (LED) lighting apparatuses adopt an LED light source unlike conventional lighting apparatuses which do not. As the conventional lighting apparatuses such as incandescent bulbs, tungsten bulbs, halogen bulbs, and so on are weeded out, the LED bulbs are becoming much more widely used.
[3] In comparison with the conventional lighting apparatuses, the LED lighting apparatuses have various advantages such as low power consumption, an inexpensive cost of operation, inexpensive maintenance expenses, a long lifespan, and high light efficiency. Further, the LED lighting apparatuses have other advantages such as stable operation, easy installation, and excellent reliability.
[4] However, in terms of the commercialization of the LED bulb, the heat generated from the LED becomes an issue. Many studies for solving this problem are being conducted.
[5] FIG. 5 is a front view illustrating a conventional LED bulb, and FIG. 6 is a cross- sectional view illustrating an interior of the conventional LED bulb of FIG. 5.
[6] Referring to FIGS. 5 and 6, the conventional LED bulb 200 includes a lens or cover
201 for diffusing light, a body fastener 202, a body 203 having a metal radiator, a coupling step 204 on which a metal LED board 9 is placed, and a power board 206. The metal LED board 9 is spaced apart from the power board 206 by a predetermined distance 205 so as to be less influenced by the heat.
[7] In detail, in orto deal with the heat generated from the power LED, as illustrated in
FIG. 6, the power LED is mounted on the metal PCB. In order to deal with the high temperature of the metal PCB, the bulb body is made of aluminum having good thermal conductivity, and is coupled with a heat sink having a comb shape so as to increase the contact area with the air and so to dissipate heat. Further, the board of a circuit for supplying current or voltage to the LED is spaced apart by a predetermined distance, thereby reducing malfunction and the temperature influence on a semiconductor device as caused by the heat generated from the metal PCB.
[8] In the conventional LED bulb, however, the power LED is mounted on the metal
PCB in order to radiate the heat generated from the power LED, and the comb-shaped heat sink for dissipating the heat is located outside the LED bulb.
[9] As a result, the conduction and diffusion of heat are weak, and thus heat dissipation is low. As such, the heat sink becomes bulky, degrading the geometrical beauty of the LED bulb. Furthermore, the heat sink is made of aluminum or die cast aluminum in order to obtain high heat radiation efficiency, thereby considerably increasing production costs.
[10] The volume of the LED bulb is also increased to lessen mechanical incompatibility with an existing incandescent bulb or an existing compact fluorescent lamp (CFL) Moreover, in the conventional LED bulb, the spacing distance 205 caused by the heat is dependent on characteristics of the power LED such as consumption power. In other words, the power LED is not standardized. This is responsible for very low applicability. For example, the LED bulb may be designed to have the spacing distance of 1 cm or more, and then a different standard of power LED may be applied to the LED bulb. In this case, the power LEDs have different temperature characteristics, and the LED bulb must be again designed to change the spacing distance of 1 cm or more.
[11] Further, since the heat sink has many protruding fins, the geometrical beauty of the
LED bulb is degraded, and dust easily becomes deposited in gaps between the fins. When the amount of dust is gradually increased, the geometrical beauty of the LED bulb becomes spoiled. In the worst case, there is a possibility of fire.
[12] Further, in the case in which an infrared receiver is mounted on the LED bulb, an infrared ray component of the high-temperature heat generated from the heat sink exerts an influence on the infrared receiver, thereby causing malfunction of the infrared receiver.
[13] In addition, a separate shade is not detachably installed on the conventional LED bulb. If possible, a user cannot easily replace the shade so as to suit his/her own taste. Disclosure of Invention Technical Problem
[14] Accordingly, the present invention has been made in an effort to solve the problems occurring in the related art, and an embodiment of the present invention provides a light emitting diode (LED) bulb, capable of eliminating the problem of a heat sink occupying a wide area due to the high-temperature heat present in a conventional LED bulb, and capable of reducing the volume and size of the heat radiating metal as well as reducing the overall volume and size of plastic bulb material, thus reducing production costs.
[15] Another embodiment of the present invention provides an LED bulb, capable of solving the problem of the geometrical beauty thereof being degraded due to the heat sink having protruding fins, dust becoming easily deposited in gaps between the fins, and the amount of the dust gradually increasing and leading to a possibility of fire.
[16] Another embodiment of the present invention provides an LED bulb, capable of solving a problem whereby an infrared receiver mounted on the LED bulb is influenced by an infrared ray component included in heat generated from an LED, thereby causing malfunctioning of the infrared receiver. Technical Solution
[17] In order to achieve the above objects, according to one aspect of the present invention, there is provided an exchangeable shade for a light-emitting-diode bulb, which comprises: a metal light-emitting-diode board having at least one light emitting diode and thermal conductivity; a transparent or translucent shade collecting and diffusing light emitted from the light emitting diode; a metal structure having the same shape as the metal light-emitting-diode board, and including a coupling recess for close coupling with the metal light-emitting-diode board, and a primary fastening step fastened to the shade in order to couple with or decouple from the shade, and provided on an outer circumference of the exchangeable shade light-emitting-diode bulb; a body coupled with the metal structure and provided on the outer circumference of the exchangeable shade light-emitting-diode bulb; and a control board connected with the metal light-emitting-diode board through a wire in order to drive the light emitting diode bulb, spaced apart from the metal light-emitting-diode board, and controlling color and brightness of the light emitting diode.
[18] According to another aspect of the present invention, the metal structure includes at least one heat sink on a side opposite the coupling recess in a comb shape.
[19] According to another aspect of the present invention, the control board includes a primary hole providing a hot air channel to the body.
[20] According to another aspect of the present invention, the control board includes elements for controlling the driving of the light emitting diode on a side which is opposite a lower side of the metal structure.
[21] According to another aspect of the present invention, the metal structure includes a secondary fastening step fastened to the body in order to couple and decouple the body.
[22] According to another aspect of the present invention, the metal structure includes a wire passage through which a wire connecting the metal light-emitting-diode board with the control board passes.
[23] According to another aspect of the present invention, the exchangeable shade light- emitting-diode bulb further comprises a power supply board receiving alternate current voltage from outside, converting alternate current voltage into direct current voltage, and supplying the direct current voltage to the control board. [24] According to another aspect of the present invention, the power supply board includes a secondary hole providing the hot air channel to the body.
[25] According to another aspect of the present invention, the power supply board includes a transformer that converts alternate current voltage into direct current voltage and is located on a side opposite a lower side of the metal structure.
[26] According to another aspect of the present invention, the metal structure is made of aluminum or die cast aluminum.
[27] According to another aspect of the present invention, the body includes an infrared receiving hole, which receives infrared control signals for controlling the on/off state and color and brightness of the LED, on one side of the body at a lower end of the metal structure.
[28] According to another aspect of the present invention, the body includes at least one ventilation hole below the control board.
Advantageous Effects
[29] The embodiments of the present invention having the aforementioned configuration have the following effects.
[30] First, the LED bulb has a remarkably excellent heat radiative ability by virtue of the complex configuration thereof, as compared to a conventional LED bulb. Thus, the influence which the heat generated from the LED of the LED bulb exerts on the control board, the power supply board, etc. can be reduced to further improve lifespan, stability, etc. of the LED electrodes.
[31] Secondly, the LED bulb eliminates the problem of the conventional LED bulb wherein the heat sink occupies a wide area due to the presence of high-temperature heat. Thus, the LED bulb can have a small size to provide aesthetic excellence, have a reduced cost of production, and offer mechanical compatibility with an existing incandescent bulb, an existing three-wavelength bulb, or the like.
[32] Thirdly, the LED bulb can solve problems of degradation in the geometrical beauty in conventional LED bulbs due to a heat sink having protuding fins, wherein further, dust becomes deposited in gaps between the fins, the amount of dust deposited gradually increasing and leading to a possibility of fire.
[33] Fourthly, the LED bulb can solve a problem in that when an infrared receiver is mounted on the LED bulb, an infrared ray component of the heat generated from an LED exerts an influence on the infrared receiver, causing it to malfunction.
[34] Fifthly, the LED bulb can easily couple or decouple to a separate shade, and thus produce various visual effects suitable to the tastes of a user. Brief Description of the Drawings
[35] FIG. 1 is a front view illustrating an exchangeable shade light emitting diode (LED) bulb according to an embodiment of the present invention; [36] FIG. 2 is a cross-sectional view illustrating an exchangeable shade LED bulb according to an embodiment of the present invention; [37] FIG. 3 is an exploded view illustrating an exchangeable shade LED bulb according to an embodiment of the present invention; [38] FIG. 4 is a cross-sectional view illustrating a metal structure according to an embodiment of the present invention;
[39] FIG. 5 is a front view illustrating a conventional LED bulb; and
[40] FIG. 6 is a cross-sectional view illustrating an interior of the conventional LED bulb of FIG. 5.
[41] <Description of symbols of the main parts of the drawings>
[42] 100: LED bulb 1: detachable shade
[43] 2: metal structure 3: infrared receiving hole
[44] 4: body 5: ventilation hole
[45] 6: base 7: connecting electrode
[46] 8: LED 9: metal LED board
[47] 10: connecting wire 11: wire passage
[48] 12: secondary fastening step
[49] 13: heat sink 14: infrared receiver
[50] 15: control board 16: connector
[51] 17: power supply board 18: guide structure
[52] 19: wire 20: transformer
[53] 21: connector hole
[54] 22: primary hole of control board
[55] 23: connecting hole for alternate current power
[56] 24: secondary hole of power supply board
[57] 25: coupling recess
[58] 26: primary fastening step
[59]
Best Mode for Carrying Out the Invention [60] Reference will now be made in greater detail to an exemplary embodiment of the invention, an example of which is illustrated in the accompanying drawings. [61] FIG. 1 is a front view illustrating an exchangeable shade light emitting diode (LED) bulb according to an embodiment of the present invention. [62] Referring to FIG. 1, the exchangeable shade LED bulb 100 according to an embodiment of the present invention includes a detachable shade 1, a metal structure 2, an infrared receiving hole 3, a body 4, a ventilation hole 5, a base 6, and a connecting electrode 7.
[63] The detachable shade 1 can collect or diffuse light, particularly light emitted from an
LED, and be formed of transparent or translucent material.
[64] The metal structure 2 is provided on an outer circumference of the LED bulb 100, and serves to radiate heat generated from the LED. The metal structure 2 can be made of an arbitrary metal having good thermal conductivity, for instance aluminum or die cast aluminum.
[65] The infrared receiving hole 3 receives infrared rays, and particularly infrared control signals for controlling the on/off state, color and brightness of the LED.
[66] The body 4 is coupled with the metal structure 2, and is provided on the outer circumference of the LED bulb 100.
[67] The ventilation hole 5 is installed under the body 4, and can further improve heat radiating ability in addition to the metal structure 2 having the main heat radiating function.
[68] The base 6 and the connecting electrode 7 are parts which are coupled to a bulb socket and to which alternate current voltage is applied.
[69] FIG. 2 is a cross-sectional view illustrating an exchangeable shade LED bulb according to an embodiment of the present invention, and FIG. 3 is an exploded view illustrating an exchangeable shade LED bulb according to an embodiment of the present invention.
[70] Referring to FIGS. 2 and 3, at least one LED 8 is installed on a metal LED board 9 made of thermal conductive material. In order to deal with high-temperature heat generated from the LED 8, the LED 8 is soldered to the thermal conductive metal LED board 9, so that the heat can be transmitted and radiated to the metal LED board 9.
[71] FIG. 4 is a cross-sectional view illustrating a metal structure according to an embodiment of the present invention.
[72] Referring to FIG. 4, the metal structure 2 includes a coupling recess 25, a primary fastening step 26, a secondary fastening step 12, and a heat sink 13.
[73] Referring to FIGS. 2 through 4, the coupling recess 25 of the metal structure 2 has the same shape as the metal LED board 9, so that it can be coupled closely with the metal LED board 9. This coupling can be performed on a rear surface of the metal LED board 9, for instance, by an adhering means. Thus, the metal LED board 9 is accurately placed in the coupling recess, so that a contact area thereof can be increased to more efficiently transmit and diffuse heat.
[74] Thus, the high-temperature heat generated from the LED 8 is more rapidly transmitted to and absorbed by the metal structure 2, resulting in increased diffusion and radiation of the heat. As a result, heat transfer efficiency is increased to increase the heat radiation area. [75] Further, in order to make the heat radiation area wider, at least one heat sink 13 is formed at a lower end of the metal structure 2, for instance, in a comb shape, and an outer surface of the metal structure 2 is in direct contact with air, so that the heat radiation effect is compounded. As such, a size of the metal structure 2 can be further reduced, and thus the overall size of the LED bulb 100 can be reduced.
[76] The metal structure 2 has the primary fastening step 26 and the secondary fastening step 12, so that it can be easily coupled to and decoupled from the detachable shade 1 and the body 4, respectively. In detail, the primary fastening step 26 is fastened to the shade 1 in order to couple and decouple the shade 1, and the secondary fastening step 12 is fastened to the body 4 in order to couple and decouple the body 4.
[77] To couple the shade 1, the shade 1 is pushed toward the primary fastening step 26, and is thus hooked on the primary fastening step 26 formed in the metal structure 2. Thereby, the shade 1 can be easily coupled. In this manner, a user can interchange various shades so as to make them suitable according to purpose and taste. Alternately, in the case in which the shade 1 is to be decoupled, the shade 1 is pulled weakly, and is easily decoupled.
[78] This is possible because of the use of the metal structure 2. This configuration provides reduced wear and deformation which prolongs lifespan, thus ensuring more reliable, long-term use, compared with the configuration based on a board made of plastic.
[79] Similarly, the body 4 can be easily decoupled from the metal structure 2 by the secondary fastening step 12. Thereby, the LED bulb 100 may easily be cleaned and repaired.
[80] The infrared receiver 14 receives infrared control signals for controlling the on/off state, color and brightness of the LED 8 through the infrared receiving hole 3.
[81] The control board 15 controls the on/off state, the color and the brightness of at least one LED 8 on the basis of the received infrared control signals.
[82] In order to connect the LED 8 with the control board 15, a wire 10 is connected to a connector hole 21 of the metal LED board 9 by soldering. The wire 10 is connected to the control board 15 through a wire passage 11 formed in the metal structure 2.
[83] Since the control board 15 receives a considerable amount of heat from the metal structure 2, the control board 15 is formed with a primary hole 22 in the center thereof which reduces the influence of the heat and forms a separate channel for high- temperature air to flow through. Thereby, the flow of air becomes smooth, increasing the radiative effect.
[84] The infrared receiver 14 for operating the control board 15 from a remote distance is attached to the lower end of the metal structure 2. Thereby, when the LED 8 is operated, the infrared receiver is influenced only slightly by infrared radiation components caused by high-temperature heat, thus reducing malfunction.
[85] Further, elements, which are installed on the control board 15 and control operation of the LED 8, are preferably located on the side opposite the metal structure 2.
[86] In the case in which the control board 15 is configured to have a circuit that is directly supplied with alternate current voltage, the control board 15 requires a lot of parts, and thus becomes larger. Accordingly, as a means for coping with this problem, a separate power supply board 17 including a transformer 20 converting alternate current voltage into direct current voltage is installed on the lower end of the LED bulb. The control board 15 is connected with the power supply board 17 through a connector 16.
[87] The power supply board 17 is hooked on a guide structure 18 of the body 4. The power supply board 17 is configured to convert alternate current voltage into direct current voltage, thereby outputting direct current voltage of, for instance, 30V or less. Thereby, the heat generated from the control board 15 and the ordinary power supply is remarkably reduced. Further, overall size of the LED bulb is reduced, and the LED bulb is less influenced by the heat in spite of long-term use, and thus can have a longer lifespan.
[88] The base 6 and the electrode 7 are connected with a connecting hole 23 of the power supply board 17 via a wire 19, and thus the alternate current voltage is supplied through the wire.
[89] The power supply board 17 further includes a secondary hole 24 so as to reduce accumulation of the heat in the body 4, and to make the flow of air smooth, so that the heat radiation can be improved more effectively. Further, the elements, including the transformer 20 that is installed on the power supply board 17 and converts the alternate current voltage into direct current voltage, are preferably located on the side opposite the metal structure 2.
[90] In the drawings and specification, typical exemplary embodiments of the invention have been disclosed, and although specific terms are employed, they are used in a generic and descriptive sense only and are not for the purposes of limitation, the scope of the invention being set forth in the following claims.
[91]

Claims

Claims
[1] An exchangeable shade light-emitting-diode bulb, comprising: a metal light-emitting-diode board having at least one light emitting diode and thermal conductivity; a transparent or translucent shade for collecting or diffusing light emitted from the light emitting diode; a metal structure having a shape identical to that of the metal light- emitting-diode board, and including a coupling recess closely coupled with the metal light-emitting-diode board, and a primary fastening step fastened to the shade in order to couple with or decouple from the shade, and provided on an outer circumference of the exchangeable shade light-emitting-diode bulb; a body coupled with the metal structure and provided on the outer circumference of the exchangeable shade light-emitting-diode bulb; and a control board connected with the metal light-emitting-diode board through a wire in order to drive the light emitting diode bulb, spaced apart from the metal light-emitting-diode board, and controlling color and brightness of the light emitting diode, wherein the metal structure includes at least one heat sink on a side opposite the coupling recess, having a comb shape, the control board includes a primary hole providing a hot air channel to the body; and the control board includes elements for controlling the driving of the light emitting diode on a side opposite a lower side of the metal structure.
[2] The exchangeable shade light-emitting-diode bulb as set forth in claim 1, wherein the metal structure includes a secondary fastening step fastened to the body in order to couple with and decouple from the body.
[3] The exchangeable shade light-emitting-diode bulb as set forth in claim 1, wherein the metal structure includes a wire passage through which a wire connecting the metal light-emitting-diode board with the control board passes.
[4] The exchangeable shade light-emitting-diode bulb as set forth in claim 1, further comprising a power supply board receiving alternate current voltage from an outside, converting the alternate current voltage into direct current voltage, and supplying the direct current voltage to the control board.
[5] The exchangeable shade light-emitting-diode bulb as set forth in claim 1, wherein the power supply board includes a secondary hole providing the hot air channel to the body.
[6] The exchangeable shade light-emitting-diode bulb as set forth in claim 4, wherein the power supply board includes a transformer that converts the alternate current voltage into the direct current voltage and is located on a side opposite a lower side of the metal structure. [7] The exchangeable shade light-emitting-diode bulb as set forth in claim 1, wherein the metal structure is made of aluminum or die cast aluminum. [8] The exchangeable shade light-emitting-diode bulb as set forth in claim 1, wherein the body includes an infrared receiving hole, which receives infrared control signals for controlling an on/off state, color and brightness of the LED, on one side thereof at a lower end of the metal structure. [9] The exchangeable shade light-emitting-diode bulb as set forth in claim 1, wherein the body includes at least one ventilation hole below the control board.
PCT/KR2008/003925 2007-07-04 2008-07-03 Shade exchangeable led bulb WO2009005314A2 (en)

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KR10-2007-0067170 2007-07-04

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KR100897072B1 (en) 2008-08-13 2009-05-14 이금용 Led lighting assembly
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