US20160341394A1 - Lighting device - Google Patents
Lighting device Download PDFInfo
- Publication number
- US20160341394A1 US20160341394A1 US15/230,082 US201615230082A US2016341394A1 US 20160341394 A1 US20160341394 A1 US 20160341394A1 US 201615230082 A US201615230082 A US 201615230082A US 2016341394 A1 US2016341394 A1 US 2016341394A1
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- US
- United States
- Prior art keywords
- light emitting
- lighting device
- protrusion
- inclined surfaces
- emitting diodes
- 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.)
- Abandoned
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Classifications
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- F21V3/0409—
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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
- F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- 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
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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
- 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
- F21V23/005—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 is supporting also the light source
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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
- F21V23/00—Arrangement of electric circuit elements in or on lighting devices
- F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
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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
- 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
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
- F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
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- H05B33/0815—
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- H05B37/029—
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/345—Current stabilisation; Maintaining constant current
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/40—Details of LED load circuits
- H05B45/44—Details of LED load circuits with an active control inside an LED matrix
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
- H05B47/155—Coordinated control of two or more light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
- F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
- F21V3/061—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being glass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
- F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
- F21V3/062—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material the material being plastics
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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
- F21Y2107/00—Light sources with three-dimensionally disposed light-generating elements
- F21Y2107/40—Light sources with three-dimensionally disposed light-generating elements on the sides of polyhedrons, e.g. cubes or pyramids
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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]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Definitions
- the present invention relates to a lighting device. More particularly, the present invention relates to a lighting device capable of enhancing light-distribution characteristics and luminous efficacy.
- Light-emitting devices are used in various lighting devices as well as display devices. However, since light-emitting devices are configured to emit light in one direction, lighting devices using such light-emitting devices do not satisfy light-distribution characteristics for general lighting devices.
- the present invention is aimed at providing a lighting device having wide light-distribution characteristics.
- the protrusion may have a gradually decreasing width from a bottom to a top thereof.
- the protrusion may include first inclined surfaces with different slopes.
- the light emitting diodes may be disposed at the tapered upper portion of the protrusion.
- the light emitting diodes may be disposed at the tapered upper portion and on side surfaces of the protrusion.
- the light emitting module may further include at least one flexible circuit board corresponding to the side surfaces of the protrusion.
- the base may have a heat-dissipation function.
- the lighting device may further include a diffusion section on an internal or external surface of the cover to diffuse light.
- the lighting device may further include a plurality of connection changing units connected between adjacent light emitting diodes to control connection between the light emitting diodes.
- the plurality of light emitting diodes may be composed of a plurality of light emitting diode groups, and the light emitting diode groups may be sequentially operated depending upon magnitude of AC voltage.
- the lighting device includes a light emitting module having light emitting diodes inclined inwards with respect to a vertical center line of a main body, thereby providing wide light-distribution characteristics.
- the light emitting diodes 133 are disposed on the first inclined surfaces 137 , thereby providing excellent light distribution characteristics.
- the light emitting diodes 133 may include an AC driving LED and a DC driving LED.
- the DC driving LED may be, for example, a red LED.
- the AC driving LED and the DC driving LED may be included in one light emitting diode 133 or may be separate from each other.
- the light emitting diodes 133 may be composed of the AC driving LED and the DC driving LED (Red LED) to control color temperature while improving optical characteristics.
- the base 151 further includes a protrusion 155 protruding upward from the base.
- the protrusion 155 may be integrally formed with the base 151 , or may be assembled to the base 151 as a separate component.
- FIG. 3 is a plan view of a light emitting module according to one embodiment of the present invention.
- the flexible circuit board 135 includes a plurality of first side surfaces 136 and a plurality of first inclined surfaces 137 .
- the first side surfaces 136 adjoin each other in a lateral direction and boundaries between the first side surfaces 136 are defined as first boundaries 138 .
- the flexible circuit board 135 is provided on one surface thereof with the light emitting diodes 133 and the drive circuit 134 .
- the light emitting diodes 133 are mounted on the first inclined surfaces 137 and disposed close to the second boundaries 139 .
- the flexible circuit board 135 is provided on the other surface thereof with first metal patterns 146 and second metal patterns 147 .
- the first and second metal patterns 146 , 147 transfer heat generated from the light emitting diodes 133 to a protrusion 155 . That is, the first and second metal patterns 146 , 147 are exposed to the outside through the other surface of the flexible circuit board 135 to make surface-to-surface contact with second side surfaces 156 of the protrusion 155 .
- the first and second metal patterns 146 , 147 are coupled to a dielectric layer of the flexible circuit board 135 and separated from the first and second boundaries 138 , 139 .
- the light emitting module 130 includes the light emitting diodes 133 inclined inward with respect to a vertical center line of a main body 150 , thereby providing wide light-distribution characteristics.
- the lighting device 100 is provided with the flexible circuit board 135 and the protrusion 155 in which the first side surfaces 136 and the first inclined surfaces 137 make surface-to-surface contact with the second side surfaces 156 and the second inclined surfaces 157 , respectively, thereby securing excellent heat-dissipation characteristics.
- the light emitting module 230 has the same configuration as that of the light emitting module 130 shown in FIG. 3 . Accordingly, the same components are denoted by the same reference numerals and detailed descriptions thereof will be omitted.
- the first and second light emitting diodes 233 a , 233 b are disposed adjacent second boundaries between the first inclined surfaces 137 and the first side surfaces 136 to maximize light-distribution characteristics and the intensity of light of a lighting device.
- FIG. 5 is a plan view of a light emitting module according to a further embodiment of the present invention.
- the light emitting diodes 333 include a plurality of first light emitting diodes 333 a mounted on first inclined surfaces 137 and a plurality of second light emitting diodes 233 b mounted on first side surfaces 136 .
- the first and second light emitting diodes 333 a , 333 b are alternately arranged in a lateral direction.
- the first light emitting diodes 333 a may be mounted only on the odd-numbered first inclined surfaces 137 .
- the second light emitting diodes 333 b may be mounted only on the even-numbered first side surfaces 136 .
- the first light emitting diodes 333 a may also be mounted only on the even-numbered first inclined surfaces 137
- the second light emitting diodes 333 b may also be mounted only on the odd-numbered first side surfaces 136 .
- first and second light emitting diodes 333 a and 333 b may be disposed close to second boundaries 139 between the first inclined surfaces 137 and the first side surfaces 136 .
- the first and second light emitting diodes 333 a and 333 b are alternately arranged on the first inclined surfaces 137 and the first side surfaces 136 in the lateral direction, which makes it possible to solve a problem of hot spots that can happen at a lateral side of the lighting device.
- FIG. 6 is a circuit diagram of a drive unit for a lighting device of the present invention.
- the drive unit for the lighting device of the present invention includes a plurality of LEDs L 1 to L 4 , a rectifier 1100 , a switching control signal generator 1200 , a plurality of connection changing units 1310 , 1320 , 1330 , and a plurality of constant current controllers 1410 , 1420 , 1430 , 1440 .
- the rectifier 1100 rectifies input AC voltage (V AC ) to generate driving voltage (V in ).
- the rectifier 1100 may be a bridge diode.
- the switching control signal generator 1200 generates switching control signals using the driving voltage and dimming signals, and the switching control signals include a plurality of connection control signals CN 1 to CN 3 and a plurality of current control signals CS 1 to CS 4 .
- the first connection changing unit 1310 includes a switch 1310 a , a diode D 1 , and a resistor R 1 .
- the switch 1310 a configures a first connector for connecting the first and second LEDs L 1 and L 2 in parallel
- the diode D 1 and the resistor R 1 configure a second connector for connecting the first and second LEDs L 1 and L 2 in series.
- the switch 1310 a is connected between an anode terminal of the first LED L 1 and a cathode terminal of the second LED L 2 and is selectively turned on according to the connection control signal CN 1 .
- the switch 1310 a is turned on when the connection control signal CN 1 is activated and turned off when the connection control signal CN 1 is deactivated.
- the diode D 1 is connected between a cathode terminal of the first LED L 1 and one end of the resistor R 1 .
- the other end of the resistor R 1 is connected to an anode terminal of the second LED L 2 .
- the second connection changing unit 1320 includes a switch 1320 a , a diode D 2 , and a resistor R 3 .
- the third connection changing unit 1330 includes a switch 1330 a , a diode D 3 , and a resistor R 3 .
- the second and third connection changing units 1320 , 1330 are similar to the first connection changing unit 1310 , and therefore detailed descriptions thereof will be omitted.
- the drive unit of the lighting device according to the present invention may provide uniform light by changing the connections depending upon change in AC power.
Abstract
Disclosed is a lighting device having wide light-distribution characteristics. The lighting device includes a base; a protrusion disposed on the base; and a light emitting module disposed on the protrusion; wherein the light emitting module comprises a plurality of light emitting diodes inclined inward with respect to the a protruding direction of the protrusion. Accordingly, the lighting device can provide wide light-distribution characteristics.
Description
- This application is a continuation of U.S. patent application Ser. No. 14/319,954, filed on Jun. 30, 2014, which claims priority from and the benefit of Korean Patent Application No. 10-2013-0075717, filed on Jun. 28, 2013, and Korean Patent Application No. 10-2014-0079456, filed on Jun. 27, 2014, all of which are hereby incorporated by reference for all purposes as if fully set forth herein.
- The present invention relates to a lighting device. More particularly, the present invention relates to a lighting device capable of enhancing light-distribution characteristics and luminous efficacy.
- General light-emitting devices emit light through recombination of electrons and holes between n- and p-type semiconductor layers.
- Light-emitting devices are used in various lighting devices as well as display devices. However, since light-emitting devices are configured to emit light in one direction, lighting devices using such light-emitting devices do not satisfy light-distribution characteristics for general lighting devices.
- The present invention is aimed at providing a lighting device having wide light-distribution characteristics.
- In addition, the present invention is aimed at providing a lighting device that has excellent heat-dissipation characteristics and can improve assembly and luminous efficiency.
- In accordance with one aspect of the present invention, a lighting device includes: a base; a protrusion disposed on the base; and a light emitting module disposed on the protrusion, wherein the light emitting module includes a plurality of light emitting diodes inclined inward with respect to the a protruding direction of the protrusion.
- The protrusion may have a tapered upper portion.
- The protrusion may have a gradually decreasing width from a bottom to a top thereof.
- The protrusion may include first inclined surfaces with different slopes.
- The first inclined surfaces may include a plane perpendicular to the base.
- The light emitting diodes may be disposed at the tapered upper portion of the protrusion.
- The light emitting diodes may be disposed at the tapered upper portion and on side surfaces of the protrusion.
- The light emitting diodes may be alternately disposed along the tapered upper portion and the side surfaces of the protrusion.
- The light emitting module may further include at least one flexible circuit board corresponding to the side surfaces of the protrusion.
- The flexible circuit board includes side surfaces adjacent to each other in a circumferential direction and inclined surfaces extending from the side surfaces.
- The base may have a heat-dissipation function.
- The protrusion may be integrally formed with the base.
- The lighting device may further include a cover coupled to the base to cover the light emitting module.
- The lighting device may further include a diffusion section on an internal or external surface of the cover to diffuse light.
- The light emitting diodes may be connected to each other in series or parallel depending upon magnitude of input AC power.
- The light emitting diodes may be connected to each other in series or parallel depending upon a change in input AC power.
- The lighting device may further include a plurality of connection changing units connected between adjacent light emitting diodes to control connection between the light emitting diodes.
- The plurality of light emitting diodes may include an AC driving LED and a DC driving LED.
- The plurality of light emitting diodes may be composed of a plurality of light emitting diode groups, and the light emitting diode groups may be sequentially operated depending upon magnitude of AC voltage.
- The plurality of light emitting diodes may have a multi-cell structure, the multi-cell structure may be composed of a plurality of multi-cell groups, and the multi-cell groups may be sequentially operated depending upon magnitude of AC voltage.
- According to embodiments of the invention, the lighting device includes a light emitting module having light emitting diodes inclined inwards with respect to a vertical center line of a main body, thereby providing wide light-distribution characteristics.
- In addition, according to the embodiments of the invention, the lighting device includes a flexible circuit board and a protrusion in which first side surfaces and first inclined surfaces make surface-to-surface contact with second side surfaces and second inclined surfaces, respectively, thereby securing excellent heat-dissipation characteristics. Further, in the lighting device according to the embodiments of the invention, the light emitting module includes the flexible circuit board in which the first side surfaces and the first inclined surfaces are assembled through bending, thereby providing excellent assembly efficiency.
- Furthermore, in the lighting device according to the embodiments of the invention, first and second light emitting diodes are alternately arranged on the first inclined surfaces and the first side surfaces in a lateral direction, thereby solving a problem of hot spots that can occur at a lateral side of the lighting device.
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FIG. 1 is an exploded perspective view of a lighting device according to one embodiment of the present invention. -
FIG. 2 is a combined perspective view of the lighting device shown inFIG. 1 . -
FIG. 3 is a plan view of a light emitting module according to one embodiment of the present invention. -
FIG. 4 is a plan view of a light emitting module according to another embodiment of the present invention. -
FIG. 5 is a plan view of a light emitting module according to a further embodiment of the present invention. -
FIG. 6 is a circuit diagram of a drive unit for a lighting device of the present invention. - Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided as examples so as to fully convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention is not limited to the embodiments disclosed herein and may also be implemented in different forms. In the drawings, width, length, thickness, and the like of components may be exaggerated for convenience. Throughout the present specification, like reference numerals denote like components having the same or similar functions.
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FIG. 1 is an exploded perspective view of a lighting device according to an embodiment of the present invention, andFIG. 2 is a combined perspective view of the lighting device shown inFIG. 1 . - Referring to
FIGS. 1 and 2 , alighting device 100 according to one embodiment of the invention includes amain body 150, acover 110, and alight emitting module 130. - The
light emitting module 130 includes aflexible circuit board 135 and a plurality oflight emitting diodes 133. - The
flexible circuit board 135 includes a plurality offirst side surfaces 136 and a plurality of firstinclined surfaces 137. Thefirst side surfaces 136 are adjacent to each other in a circumferential direction and may be bent with respect to boundaries therebetween to form a hexagonal prism. - The
first side surfaces 136 have a rectangular shape on a two-dimensional plane, and although not shown, include conductive wire patterns (not shown) for driving thelight emitting diodes 133. - The first
inclined surfaces 137 extend from the top of thefirst side surfaces 136. The firstinclined surfaces 137 become closer to each other from the bottom to the top thereof. The firstinclined surfaces 137 adjoin each other in the circumferential direction. Thelight emitting diodes 133 are mounted on the firstinclined surfaces 137, respectively. Here, although it is illustrated in the present embodiment that onelight emitting diode 133 is mounted on the corresponding firstinclined surface 137, the number oflight emitting diodes 133 mounted on each of the firstinclined surfaces 137 may vary. - The plural
light emitting diodes 133 are mounted on lower sides of the firstinclined surfaces 137 adjacent thefirst side surfaces 136. Although not limited to particular positions, thelight emitting diodes 133 are disposed near boundaries between the firstinclined surfaces 137 and thefirst side surfaces 136 to maximize uniform distribution of emitted-light and light distribution characteristics of the lighting device. - A
drive circuit 134 for driving thelight emitting diodes 133 is mounted on one of thefirst side surfaces 136. Thedrive circuit 134 may be an AC drive circuit for driving thelight emitting diodes 133 using AC power. Thedrive circuit 134 is directly mounted on theflexible circuit board 135, whereby thelight emitting module 130 according to the present invention can simplify circuit configuration of the lighting device. - Furthermore, in the
light emitting module 130, thelight emitting diodes 133 are disposed on the firstinclined surfaces 137, thereby providing excellent light distribution characteristics. Here, thelight emitting diodes 133 may include an AC driving LED and a DC driving LED. The DC driving LED may be, for example, a red LED. The AC driving LED and the DC driving LED may be included in onelight emitting diode 133 or may be separate from each other. Thelight emitting diodes 133 may be composed of the AC driving LED and the DC driving LED (Red LED) to control color temperature while improving optical characteristics. - The
light emitting diodes 133 may be sequentially brought into operation depending upon the magnitude of input AC power. More specifically, thelight emitting diodes 133 may be composed of, for example, first to third groups of light emitting diodes, and the first to third groups of light emitting diodes may be sequentially operated depending upon the magnitude of the AC power. That is, the first group may be operated in a first zone between a first forward voltage level and a second forward voltage level, the first and second groups may be operated in a second zone between the second forward voltage level and a third forward voltage level, and the first to third groups may be operated in a third zone between the third forward voltage level and a fourth forward voltage level. - Furthermore, the
light emitting diodes 133 may be multi-cell LEDs. The multi-cell LEDs mean that a plurality of cells is arranged to form a plurality of cell groups. In the multi-cell LEDs, the plurality of cell groups may be sequentially operated depending upon the magnitude of input AC power so as to correspond to sequential operation of the plurality of light emitting diode groups. - The
main body 150 includes abase 151 and asocket 153 connected to an external power source. - The
base 151 is partially exposed to the surroundings and an exposed portion of thebase 151 has a concave-convex structure to improve heat dissipation efficiency. Thebase 151 has a heat dissipation function. - The base 151 further includes a
protrusion 155 protruding upward from the base. Theprotrusion 155 may be integrally formed with thebase 151, or may be assembled to the base 151 as a separate component. - The
protrusion 155 includes a plurality of second side surfaces 156, a plurality of secondinclined surfaces 157, and an upper surface. The second side surfaces 156 adjoin each other in a circumferential direction to form a vertical prism. Although a hexagonal prism having six second side surfaces 156 is exemplified in the present embodiment, the number of second side surfaces 156 may be changed in various ways. - The second side surfaces 156 have a rectangular shape on a two-dimensional plane and correspond to the first side surfaces 136. That is, the first and second side surfaces 136 and 156 make surface-to-surface contact with each other.
- The second
inclined surfaces 157 extend from upper sides of the second side surfaces 156. The secondinclined surfaces 157 correspond to the firstinclined surfaces 137. That is, the first and secondinclined surfaces - The
cover 110 is disposed on themain body 150 and coupled to themain body 150 to cover thelight emitting module 130. Thecover 110 may further include a diffusion section formed on or provided to an internal or external surface thereof. - The
cover 110 is not limited to a particular material and may be formed of, for example, transparent glass, plastic, polypropylene (PP), polyethylene (PE), polycarbonate (PC), or the like. - As such, in the
lighting device 100 according to the embodiment of the invention, thelight emitting module 130 includes thelight emitting diodes 133 inclined inward with respect to the a vertical center line of themain body 150, thereby providing wide light-distribution characteristics. - In addition, according to the embodiment of the invention, the
lighting device 100 is provided with theflexible circuit board 135 and theprotrusion 155 in which the first side surfaces 136 and the firstinclined surfaces 137 make surface-to-surface contact with the second side surfaces 156 and the secondinclined surfaces 157, respectively, thereby securing excellent heat-dissipation characteristics. Furthermore, in thelighting device 100 the embodiment of the invention, thelight emitting module 130 includes theflexible circuit board 135 in which the first side surfaces and the first inclined surfaces are assembled through bending, thereby providing excellent assembly efficiency. -
FIG. 3 is a plan view of a light emitting module according to one embodiment of the present invention. - Referring to
FIGS. 1 to 3 , thelight emitting module 130 according to the embodiment of the invention includes aflexible circuit board 135, a plurality oflight emitting diodes 133, and adrive circuit 134. - The
flexible circuit board 135 includes a plurality of first side surfaces 136 and a plurality of firstinclined surfaces 137. - The first side surfaces 136 adjoin each other in a lateral direction and boundaries between the first side surfaces 136 are defined as
first boundaries 138. - The plural first
inclined surfaces 137 are separated from each other in the lateral direction and adjoin each other when thelight emitting module 130 is assembled. Boundaries between the firstinclined surfaces 137 and the first side surfaces 136 are defined assecond boundaries 139. - The
flexible circuit board 135 is provided on one surface thereof with thelight emitting diodes 133 and thedrive circuit 134. Thelight emitting diodes 133 are mounted on the firstinclined surfaces 137 and disposed close to thesecond boundaries 139. - The
flexible circuit board 135 is provided on the other surface thereof withfirst metal patterns 146 andsecond metal patterns 147. The first andsecond metal patterns light emitting diodes 133 to aprotrusion 155. That is, the first andsecond metal patterns flexible circuit board 135 to make surface-to-surface contact with second side surfaces 156 of theprotrusion 155. The first andsecond metal patterns flexible circuit board 135 and separated from the first andsecond boundaries - In assembly of the
light emitting module 130, the plural first side surfaces 136 are bent with respect to thefirst boundaries 138 to form a hexagonal prism, and the plural firstinclined surfaces 137 are bent with respect to thesecond boundaries 139 to adjoin each other. - As such, in the
lighting device 100 according to the embodiment of the invention, thelight emitting module 130 includes thelight emitting diodes 133 inclined inward with respect to a vertical center line of amain body 150, thereby providing wide light-distribution characteristics. - Furthermore, the
lighting device 100 is provided with theflexible circuit board 135 and theprotrusion 155 in which the first side surfaces 136 and the firstinclined surfaces 137 make surface-to-surface contact with the second side surfaces 156 and the secondinclined surfaces 157, respectively, thereby securing excellent heat-dissipation characteristics. -
FIG. 4 is a plan view of a light emitting module according to another embodiment of the present invention. - Referring to
FIG. 4 , except forlight emitting diodes 233, thelight emitting module 230 according to this embodiment of the invention has the same configuration as that of thelight emitting module 130 shown inFIG. 3 . Accordingly, the same components are denoted by the same reference numerals and detailed descriptions thereof will be omitted. - The
light emitting diodes 233 include a plurality of firstlight emitting diodes 233 a mounted on firstinclined surfaces 137 and a plurality of secondlight emitting diodes 233 b mounted on first side surfaces 136. - The first and second
light emitting diodes inclined surfaces 137 and the first side surfaces 136 to maximize light-distribution characteristics and the intensity of light of a lighting device. -
FIG. 5 is a plan view of a light emitting module according to a further embodiment of the present invention. - Referring to
FIG. 5 , except forlight emitting diodes 333, thelight emitting module 330 according to this embodiment of the invention has the same configuration as that of thelight emitting module 130 shown inFIG. 3 . Accordingly, the same components are denoted by the same reference numerals and detailed descriptions thereof will be omitted. - The
light emitting diodes 333 include a plurality of firstlight emitting diodes 333 a mounted on firstinclined surfaces 137 and a plurality of secondlight emitting diodes 233 b mounted on first side surfaces 136. - The first and second
light emitting diodes light emitting diodes 333 a may be mounted only on the odd-numbered first inclined surfaces 137. The secondlight emitting diodes 333 b may be mounted only on the even-numbered first side surfaces 136. In contrast, the firstlight emitting diodes 333 a may also be mounted only on the even-numbered firstinclined surfaces 137, and the secondlight emitting diodes 333 b may also be mounted only on the odd-numbered first side surfaces 136. - In addition, the first and second
light emitting diodes second boundaries 139 between the firstinclined surfaces 137 and the first side surfaces 136. - In the
light emitting module 330 according to the embodiment of the invention, the first and secondlight emitting diodes inclined surfaces 137 and the first side surfaces 136 in the lateral direction, which makes it possible to solve a problem of hot spots that can happen at a lateral side of the lighting device. -
FIG. 6 is a circuit diagram of a drive unit for a lighting device of the present invention. - Referring to
FIG. 6 , the drive unit for the lighting device of the present invention includes a plurality of LEDs L1 to L4, arectifier 1100, a switchingcontrol signal generator 1200, a plurality ofconnection changing units current controllers - The
rectifier 1100 rectifies input AC voltage (VAC) to generate driving voltage (Vin). For example, therectifier 1100 may be a bridge diode. - The switching
control signal generator 1200 generates switching control signals using the driving voltage and dimming signals, and the switching control signals include a plurality of connection control signals CN1 to CN3 and a plurality of current control signals CS1 to CS4. - The
connection changing units connection changing units - To achieve this, the first
connection changing unit 1310 includes aswitch 1310 a, a diode D1, and a resistor R1. Here, theswitch 1310 a configures a first connector for connecting the first and second LEDs L1 and L2 in parallel, and the diode D1 and the resistor R1 configure a second connector for connecting the first and second LEDs L1 and L2 in series. Theswitch 1310 a is connected between an anode terminal of the first LED L1 and a cathode terminal of the second LED L2 and is selectively turned on according to the connection control signal CN1. Theswitch 1310 a according to the embodiment of the invention is turned on when the connection control signal CN1 is activated and turned off when the connection control signal CN1 is deactivated. The diode D1 is connected between a cathode terminal of the first LED L1 and one end of the resistor R1. The other end of the resistor R1 is connected to an anode terminal of the second LED L2. - The second
connection changing unit 1320 includes aswitch 1320 a, a diode D2, and a resistor R3. The thirdconnection changing unit 1330 includes aswitch 1330 a, a diode D3, and a resistor R3. The second and thirdconnection changing units connection changing unit 1310, and therefore detailed descriptions thereof will be omitted. - The drive unit of the lighting device may control the
switches control signal generator 1200 to connect the first to fourth LEDs L1 to L4 in series and parallel. - That is, the drive unit of the lighting device according to the present invention may provide uniform light by changing the connections depending upon change in AC power.
- While various embodiments of the present invention have been described, the present invention is not limited to a particular embodiment. In addition, the components described in the specific embodiment may be used for other embodiments in the same or similar ways, without departing from the spirit and the scope of the present invention.
Claims (17)
1-20. (canceled)
21. A lighting device, comprising:
a main body comprising a socket for connection to an external power source and a protrusion protruding upwards from the socket;
a light emitting module supported by the protrusion; and
a cover coupled to the main body and covering the light emitting module,
wherein the light emitting module is disposed around the protrusion, the light emitting module comprising at least a light emitting diode, a substrate comprising an inclined surface on which the light emitting diode is mounted, and a conductive wire connected to the light emitting diode, and
wherein the inclined surface is inclined with respect to a protruding direction of the protrusion.
22. The lighting device of claim 21 , wherein the inclined surface is inclined towards the protrusion in the protruding direction of the protrusion.
23. The lighting device of claim 21 , wherein a plurality of light emitting diodes are disposed on the inclined surface.
24. The lighting device of claim 23 , wherein the plurality of light emitting diodes are disposed on one plane of the inclined surface.
25. The lighting device of claim 21 , wherein the light emitting module provides a plurality of inclined surfaces inclined with respect to the protruding direction of the protrusion, and at least one light emitting diode is disposed on each of the inclined surfaces.
26. The lighting device of claim 25 , wherein the plurality of inclined surfaces are symmetrically disposed around the protrusion.
27. The lighting device of claim 26 , wherein the plurality of inclined surfaces approach the protrusion with increasing distance from the socket.
28. The lighting device of claim 25 , wherein the plurality of inclined surfaces are separated from each other.
29. The lighting device of claim 25 , wherein the light emitting diodes are connected to each other in series or in parallel.
30. The lighting device of claim 21 , wherein the cover is formed of a transparent material selected from the group consisting of glass, polypropylene (PP), polyethylene (PE), and polycarbonate (PC).
31. The lighting device of claim 21 , wherein the substrate comprises a flexible printed circuit board.
32. The lighting device of claim 21 , wherein the main body further comprises a base disposed at an upper portion of the socket, and the protrusion protrudes from an upper surface of the base.
33. The lighting device of claim 32 , wherein the base comprises a thermally conductive material configured to dissipate heat.
34. The lighting device of claim 21 , wherein the light emitting module comprises a plurality of light emitting diodes arranged along the substrate disposed around the protrusion in an upward direction from the socket.
35. The lighting device of claim 21 , wherein the light emitting module provides a plurality of inclined surfaces inclined with respect to the protruding direction of the protrusion, and the light emitting diode is disposed on each of inclined surfaces separated from each other among the inclined surfaces.
36. The lighting device of claim 21 , further comprising:
a drive circuit,
the drive circuit being electrically connected to an external power source through the socket and to the light emitting diode through the conductive wire.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/230,082 US20160341394A1 (en) | 2013-06-28 | 2016-08-05 | Lighting device |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR20130075717 | 2013-06-28 | ||
KR10-2013-0075717 | 2013-06-28 | ||
KR10-2014-0079456 | 2014-06-27 | ||
KR1020140079456A KR102325502B1 (en) | 2013-06-28 | 2014-06-27 | Lightting device |
US14/319,954 US9447928B2 (en) | 2013-06-28 | 2014-06-30 | Lighting device |
US15/230,082 US20160341394A1 (en) | 2013-06-28 | 2016-08-05 | Lighting device |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/319,954 Continuation US9447928B2 (en) | 2013-06-28 | 2014-06-30 | Lighting device |
Publications (1)
Publication Number | Publication Date |
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US20160341394A1 true US20160341394A1 (en) | 2016-11-24 |
Family
ID=52142299
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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US14/319,954 Active US9447928B2 (en) | 2013-06-28 | 2014-06-30 | Lighting device |
US15/230,082 Abandoned US20160341394A1 (en) | 2013-06-28 | 2016-08-05 | Lighting device |
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Application Number | Title | Priority Date | Filing Date |
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US14/319,954 Active US9447928B2 (en) | 2013-06-28 | 2014-06-30 | Lighting device |
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US (2) | US9447928B2 (en) |
WO (1) | WO2014209055A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITUB20159895A1 (en) * | 2015-12-22 | 2017-06-22 | Sozzi Arredamenti S R L | SOURCE OF MODULAR LIGHTING |
DE102019102056A1 (en) * | 2019-01-28 | 2020-07-30 | Ledvance Gmbh | Reflector lamp with three-dimensional light engine |
WO2021162579A1 (en) * | 2020-02-11 | 2021-08-19 | Юрий Борисович СОКОЛОВ | Led lamp with molded housing/heatsink |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2000017569A1 (en) * | 1998-09-17 | 2000-03-30 | Koninklijke Philips Electronics N.V. | Led lamp |
US7728345B2 (en) * | 2001-08-24 | 2010-06-01 | Cao Group, Inc. | Semiconductor light source for illuminating a physical space including a 3-dimensional lead frame |
JP2005243396A (en) * | 2004-02-26 | 2005-09-08 | Matsushita Electric Ind Co Ltd | Led lighting device |
JP2006244725A (en) * | 2005-02-28 | 2006-09-14 | Atex Co Ltd | Led lighting system |
KR100967941B1 (en) * | 2008-08-13 | 2010-07-06 | 주식회사 자화라이텍 | Structure for light distribution of street lamp |
US8324840B2 (en) * | 2009-06-04 | 2012-12-04 | Point Somee Limited Liability Company | Apparatus, method and system for providing AC line power to lighting devices |
AT508013B1 (en) * | 2009-06-26 | 2010-10-15 | Rosenitsch Harald Ing | LAMP |
KR101106273B1 (en) * | 2010-02-03 | 2012-01-18 | 주식회사 아모럭스 | LED Lighting Apparatus Having Block Assembly Structure |
KR101194760B1 (en) * | 2012-02-20 | 2012-10-25 | 창조에너콘주식회사 | A multi-lateral dome type flood light with improved distribution and intensity of illumination |
US20140268697A1 (en) * | 2013-03-14 | 2014-09-18 | C-M Glo, Llc | Dual AC-LED/DC-LED Lamp With Alternating Power Sources |
-
2014
- 2014-06-27 WO PCT/KR2014/005736 patent/WO2014209055A1/en active Application Filing
- 2014-06-30 US US14/319,954 patent/US9447928B2/en active Active
-
2016
- 2016-08-05 US US15/230,082 patent/US20160341394A1/en not_active Abandoned
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US9447928B2 (en) | 2016-09-20 |
US20150016110A1 (en) | 2015-01-15 |
WO2014209055A1 (en) | 2014-12-31 |
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