WO2014181996A1 - 발광 소자 - Google Patents
발광 소자 Download PDFInfo
- Publication number
- WO2014181996A1 WO2014181996A1 PCT/KR2014/003781 KR2014003781W WO2014181996A1 WO 2014181996 A1 WO2014181996 A1 WO 2014181996A1 KR 2014003781 W KR2014003781 W KR 2014003781W WO 2014181996 A1 WO2014181996 A1 WO 2014181996A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light emitting
- straight line
- wire
- disposed
- metal layer
- Prior art date
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- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls
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- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L24/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
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- H01L25/03—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes
- H01L25/04—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers
- H01L25/075—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00
- H01L25/0753—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof all the devices being of a type provided for in the same subgroup of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. assemblies of rectifier diodes the devices not having separate containers the devices being of a type provided for in group H01L33/00 the devices being arranged next to each other
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/44—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the coatings, e.g. passivation layer or anti-reflective coating
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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- H01L2224/481—Disposition
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- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48225—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
- H01L2224/48227—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item
- H01L2224/48229—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation connecting the wire to a bond pad of the item the bond pad protruding from the surface of the item
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
- H01L2224/491—Disposition
- H01L2224/4912—Layout
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L24/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
Definitions
- This embodiment relates to a light emitting device.
- a light emitting device such as a light emitting device, is a kind of semiconductor device that converts electrical energy into light, and has been spotlighted as a next-generation light source by replacing a conventional fluorescent lamp and an incandescent lamp.
- light emitting diodes Since light emitting diodes generate light using semiconductor devices, they consume much less power than incandescent lamps that generate light by heating tungsten or fluorescent lamps that generate light by colliding ultraviolet light generated through high-pressure discharge with phosphors. .
- the light emitting diode since the light emitting diode generates light using the potential gap of the semiconductor device, the light emitting diode has a longer life, a faster response characteristic, and an environment-friendly characteristic than a conventional light source.
- the light emitting diodes are increasingly used as light sources of lighting devices such as various lamps, liquid crystal displays, electronic displays, and street lamps that are used indoors and outdoors. have.
- the embodiment provides a light emitting device in which a plurality of wires are arranged in a radial direction.
- the embodiment provides a light emitting device in which a plurality of wires connected to different light emitting chips are arranged in a radial direction.
- the embodiment provides a light emitting device in which a plurality of wires protruding through different regions of a spherical surface of a molding member are arranged in a radial direction.
- the embodiment provides a light emitting device in which a plurality of wires passing through an outer line of a heat dissipation plate on which a plurality of light emitting chips are arranged are arranged in a radial direction.
- the embodiment provides a light emitting device in which wires passing through an outline of a circular heat dissipation plate are arranged in a normal direction with respect to a tangent passing through a point of an outline of the heat dissipation plate.
- the embodiment provides a light emitting device in which a straight line connecting both ends of a wire connected to a metal layer and a light emitting chip disposed on a heat sink is arranged in a radial direction from the center of the heat sink.
- the embodiment can provide a light emitting device in which a plurality of wires coupled to a molding member and the reflective member are arranged in a radial direction from the center of the heat dissipation plate.
- the embodiment can improve heat radiation efficiency of a light emitting device having a plurality of light emitting chips.
- the embodiment can improve electrical reliability of a light emitting device having a plurality of light emitting chips.
- the light emitting device the body; First and second metal layers disposed on an upper surface of the body; A heat dissipation plate disposed between the first and second metal layers and having a circular outline; A plurality of light emitting parts disposed on the heat dissipation plate; A plurality of first and second bonding regions disposed on the first and second metal layers and electrically connected to the plurality of light emitting units, and a molding member disposed on the heat dissipation plate and covering the plurality of light emitting units.
- Each of the light emitting units may include a plurality of light emitting chips connected to each other; And a plurality of wires electrically connecting the plurality of light emitting chips to the first and second bonding regions, wherein the plurality of wires of each light emitting unit are arranged in a radial direction from the center of the heat dissipation plate.
- the embodiment can improve the reliability of a light emitting device having a plurality of light emitting chips.
- the embodiment can improve heat radiation efficiency of a light emitting device having a plurality of light emitting chips.
- the embodiment can improve the reliability of the light emitting device and the lighting system having the same.
- FIG. 1 is a plan view of a light emitting device according to a first embodiment.
- FIG. 2 is a plan view illustrating in detail the heat sink and the first and second metal layers in the light emitting device of FIG. 1.
- FIG. 3 is a cross-sectional view along the A-A side of the light emitting device of FIG.
- FIG. 4 is a view illustrating a connection state of a first wire of a first light emitting unit in the light emitting device of FIG. 1.
- FIG. 5 is a view illustrating a connection state of a first wire of a first light emitting unit in the light emitting device of FIG. 1.
- FIG. 6 is a diagram illustrating an example of compressive deformation of a circuit board of the light emitting device of FIG. 1.
- FIG. 7 is a diagram illustrating an example of tensile deformation of a circuit board of the light emitting device of FIG. 1.
- FIG. 8 is a graph illustrating a moving distance according to vertical deformation due to compression and tensile deformation of the circuit boards of FIGS. 6 and 7.
- FIG. 9 is a graph illustrating an equivalent stress for each temperature at a boundary area between a molding member and a reflective member of a circuit board according to an exemplary embodiment.
- FIG. 10 is a diagram illustrating a maximum deformation for each temperature at a boundary area between a molding member and a reflective member of a circuit board according to an exemplary embodiment.
- FIG. 11 is a diagram illustrating another example of the light emitting device of FIG. 3.
- FIG. 12 is a diagram illustrating still another example of the light emitting device of FIG. 3.
- FIG. 13 is a diagram illustrating another example of the light emitting device of FIG. 1.
- FIG. 14 is a plan view illustrating a light emitting device according to a second embodiment.
- FIG. 15 is a partially enlarged view of the light emitting device of FIG. 14.
- 16 is a view showing an example of a light emitting chip of a light emitting device according to the embodiment.
- 17 is a diagram illustrating a display device having a light emitting device according to an exemplary embodiment.
- FIG. 18 is a diagram illustrating another example of a display device having a light emitting device according to an exemplary embodiment.
- 19 is a perspective view of a lighting device having a light emitting device according to the embodiment.
- FIGS. 1 to 5 a light emitting device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
- FIG. 1 is a plan view of a light emitting device according to the first embodiment
- FIG. 2 is a plan view showing in detail the heat dissipation plate and the first and second metal layers in the light emitting device of FIG. 4 is a side cross-sectional view
- FIG. 4 is a view showing a connection state of the first light emitting unit of the first light emitting unit in FIG. 1, and FIG. to be.
- the light emitting device includes a body 11 and a plurality of metal layers 13 and 15 disposed on an upper surface of the body 11; A heat sink 17 disposed between the plurality of metal layers 13 and 15; A plurality of light emitting parts 30 and 30A having light emitting chips 31, 32, 33, 41, 42, and 43 on the heat sink 17; A reflection member 23 disposed around the heat sink 17; And a molding member 25 disposed on the heat sink 17. And a plurality of wires 71, 73, 81, and 83 connected to the light emitting parts 30 and 30A and the metal layers 13 and 15, respectively.
- the light emitting device includes a plurality of metal layers 45 and 47 on a lower surface of the body 11; And a plurality of connection electrodes 14 and 16 disposed in the body 11.
- the light emitting device is a package or unit having a plurality of light emitting chips 31, 32, 33, 41, 42, 43, and may be applied to lighting devices such as lighting lamps, indoor lamps, outdoor lamps, indicator lamps, and conducting lamps.
- the body 11 of the light emitting device may include an insulating material, for example, a resin material such as silicon, epoxy, or plastic material.
- the body 11 may be formed of a resin material such as polyphthalamide (PPA).
- PPA polyphthalamide
- the silicon includes a white resin.
- the body 11 may be selectively added among an acid anhydride, an antioxidant, a release material, a light reflector, an inorganic filler, a curing catalyst, a light stabilizer, a lubricant, and titanium dioxide. It contains.
- the body 11 may be molded by at least one selected from the group consisting of a modified epoxy resin, a modified silicone resin, an acrylic resin, and a urethane resin.
- an epoxy resin composed of triglycidyl isocyanurate, hydrogenated bisphenol A diglycidyl ether, or the like, an acid composed of hexahydro phthalic anhydride, 3-methylhexahydro phthalic anhydride 4-methylhexahydrophthalic anhydride, or the like.
- the anhydride was added to the epoxy resin by adding DBU (1,8-Diazabicyclo (5,4,0) undecene-7) as a curing accelerator, ethylene glycol, titanium oxide pigment and glass fiber as a promoter, and partially by heating.
- DBU 1,8-Diazabicyclo (5,4,0) undecene-7
- the solid epoxy resin composition hardened by reaction and B staged can be used, It does not limit to this.
- the body 11 includes an insulating material, for example, a ceramic material.
- the ceramic material includes a low temperature co-fired ceramic (LTCC) or a high temperature co-fired ceramic (HTCC) which is co-fired.
- the body 11 may include a metal oxide, for example, SiO 2 , Si x O y , Si 3 N 4 , Si x N y , SiO x N y , Al 2 O 3 .
- the body 11 is adjacent to the first side 1 and the second side 2 opposite to each other, and the third side and the third side 3 adjacent to the first side 1 and the second side 2 and opposite to each other. And 4).
- the lengths of the first and second side surfaces 1 and 2 may be longer than or equal to the lengths of the third and fourth side surfaces 3 and 4.
- the top view shape of the body 11 may have a polygonal shape, for example, a rectangular shape, but may include a shape having a curved surface.
- the upper surface of the body 11 includes a plurality of metal layers 13 and 15, for example, first and second metal layers 13 and 15 separated from each other.
- the first metal layer 13 may be disposed in a first region of the upper surface of the body 11 and adjacent to the first, second, and third side surfaces 1, 2, and 3 of the body 11.
- the second metal layer 15 may be disposed in a second region of the upper surface of the body 11 and may be disposed adjacent to the first, second and fourth side surfaces 1, 2, and 4 of the body 11.
- the body 11 and the first and second metal layers 13 and 15 may be defined as a circuit board 10.
- the lower surface of the body 11 includes a plurality of metal layers, for example, third and fourth metal layers 45 and 47.
- the circuit board 10 may further include the third and fourth metal layers 45 and 47.
- the third metal layer 45 may be disposed to overlap the first metal layer 13 in the vertical direction.
- the third metal layer 45 may be disposed to overlap the heat sink 17 in the vertical direction.
- the third metal layer 45 may be disposed in an area larger than the area of the first metal layer 13.
- the fourth metal layer 47 may be disposed to overlap the second metal layer 15 in the vertical direction.
- the fourth metal layer 47 may be disposed to overlap the heat sink 17 in the vertical direction.
- the fourth metal layer 47 may be formed with an area larger than the area of the second metal layer 15.
- the heat dissipation efficiency of the light emitting device may be improved by the third and fourth metal layers 45 and 47.
- the third and fourth metal layers 45 and 47 may be mounted on
- the body 11 includes a plurality of connection electrodes 14 and 16, for example, a first connection electrode 14 and a second connection electrode 16 spaced apart from each other.
- the circuit board 10 may include a first connection electrode 14 and a second connection electrode 16.
- the first connection electrode 14 may overlap with the regions of the first and third metal layers 13 and 45 in the vertical direction.
- the first connection electrode 14 is electrically connected to the first and third metal layers 13 and 45.
- the first connection electrode 14 may be disposed in the body 11 or one or more, but is not limited thereto.
- the second connection electrode 16 may overlap with the regions of the second and fourth metal layers 15 and 47 in a vertical direction.
- the second connection electrode 16 is electrically connected to the second and fourth metal layers 15 and 47.
- the second connection electrode 16 may be disposed in the body 11 or one or more, but is not limited thereto.
- the distance between the first and second connection electrodes 14 and 16 may be wider than the width of the heat sink 17. Accordingly, the power path of the light emitting device can be dispersed, and the heat dissipation efficiency can be improved.
- the heat sink 17 is disposed on the upper surface of the body (11).
- the heat sink 17 may be disposed between the first and second metal layers 13 and 15 and overlap the third and fourth metal layers 45 and 47 in a vertical direction.
- the first and second metal layers 13 and 15 may face each other on the outer side surface of the heat sink 17.
- the first metal layer 13 covers 45 to 49% of the outer side of the heat sink 17, and the second metal layer 15 covers 45 to 49% of the outer side of the heat sink 17. Done.
- the first and second metal layers 13 and 15 are disposed along an outline of the heat sink 17.
- a region corresponding to the outer side surface of the heat sink 17 among the inner regions of the first metal layer 13 may be formed in a semicircular shape.
- a region corresponding to the outer side surface of the heat sink 17 among the inner regions of the second metal layer 15 may be formed in a semicircular shape.
- the heat sink 17 includes a shape having a curved top view shape, for example, a circular shape.
- the outline of the heat sink 17 may be formed in a circular shape.
- the diameter E1 of the heat sink 17 may be 50% or more, for example, 70% or more of the width of the body 11.
- Diameter E1 of the heat sink 17 may be formed in the range of 70 ⁇ 95% of the width of the body (11).
- the width of the body 11 may represent the length in the X-axis direction, the length represents the length in the Y-axis direction.
- the width of the body 11 may be a gap between the first and second side surfaces (1, 2), but is not limited thereto.
- the heat sink 17 may be formed to have the same thickness as that of the first and second metal layers 13 and 15, or may be formed to a thicker thickness.
- the protective layer 21 may be disposed on upper surfaces of the first and second metal layers 13 and 15.
- the protective layer 21 may be disposed on the boundary region and the outer side surface of the first and second metal layers 13 and 15.
- the protective layer 21 may be formed on edges of the first, second, and fourth side surfaces 1, 2, and 4 of the body 11. Accordingly, the first metal layer 13 is spaced apart from edges of the first, second, and third side surfaces 1, 2, and 3 of the body 11, and the second metal layer 15 is separated from the edge. It is spaced apart from the edges of the first, second and fourth sides 1, 2, 4 of the body 11.
- the protective layer 21 prevents the surfaces of the first and second metal layers 13 and 15 from being exposed.
- the protective layer 21 may protect the first and second metal layers 13 and 15 from corrosion or electrical reliability.
- the protective layer 21 may be formed of an insulating material, for example, a material such as a photoresist, but is not limited thereto.
- the first metal layer 13 includes a first open region 13A, a first support protrusion 13B, and a first bonding region 12A.
- the first open region 13A may be a region where the protective layer 21 is removed from the upper surface of the second metal layer 15, and wires may be contacted or bonded.
- the first supporting protrusion 13B extends from the first metal layer 13 in at least one side surface of the body 11, for example, in the direction of the third side surface 3.
- the first support protrusion 13B may be a lead terminal for plating or support the first metal layer 13 during injection.
- the first bonding region 12A is disposed along a circumference of the heat sink 17, and is, for example, a region recessed in a hemispherical shape along an outer contour of the heat sink 17.
- the first bonding region 12A is an open region in which the protective layer 21 is removed, is connected to the light emitting units 30 and 30A, and supplies the first polarity power.
- the second metal layer 15 includes a second open region 15A, a second support protrusion 15B, and a second bonding region 12B.
- the second open region 13A may be a region where the protective layer 21 is removed from the upper surface of the second metal layer 15.
- a separate wire may be bonded or contacted to the second open area 13A.
- the second supporting protrusion 15B includes at least one, and extends from the second metal layer 15 to the outer side of the body 11.
- the second support protrusion 15B may be a lead terminal for plating or support the second metal layer 15 during injection. For example, when there are a plurality of second supporting protrusions 15B, the second supporting protrusions 15B may extend in the first and second side surfaces 1 and 2 of the body 11.
- the second bonding region 12B is disposed along a circumference of the heat sink 17, and is, for example, a region recessed in a hemispherical shape along an outer contour of the heat sink 17.
- the second bonding region 12B is an open region in which the protective layer 21 is removed and is connected to the light emitting units 30 and 30A to supply the second polarity power.
- first and second bonding regions 12A and 12B are disposed along the outer circumference of the heat sink 17, the lengths and positions of the wires 71, 73, 81, and 83, and the light emitting chips 31, 32, and 33
- the arrangement of (41, 42, 43) is easy.
- the first to fourth metal layers 13, 15, 45, and 47 may include titanium (Ti), copper (Cu), nickel (Ni), gold (Au), chromium (Cr), tantalum (Ta), and platinum ( It may include at least one metal of Pt, tin (Sn), silver (Ag), phosphorus (P), aluminum (Al), and palladium (Pd).
- the first to fourth metal layers 13, 15, 45, and 47 may be formed in multiple layers of, for example, different metals.
- a plating layer may be formed on the surfaces of the first to fourth metal layers 13, 15, 45, and 47, but is not limited thereto. The plating layer may be exposed on the first and second bonding regions 12A and 12B.
- the first gap portion 18 is disposed along the circumference of the heat sink 17, and is disposed between the first and second metal layers 13 and 15 and the heat sink 17.
- the first gap portion 18 may be formed in a ring shape, and blocks contact between the heat sink 17 and the first and second metal layers 13 and 15.
- a portion of the molding member 25 or a portion of the reflective member 23 may be disposed in the first gap portion 18.
- the second gap portion 19 is disposed between the first and second metal layers 13 and 15 and is connected to the first gap portion 18.
- the second gap portion 19 may be a gap between the first and second metal layers 13 and 15 in a region except for the heat sink 17.
- the second gap portion 19 may be disposed to be wider than the width of the first gap portion 18. Accordingly, the gap between the first and second metal layers 13 and 15 may be wider than the gap between the heat sink 17 and the first metal layer 13 or the second metal layer 15.
- the heat sink 17 includes a third support protrusion 17A, and the third support protrusion 17A is a side surface of the body 11 along the second gap portion 19, for example, the first and the second support protrusions 17A. It can extend to the side (1, 2).
- the third support protrusion 17A may extend from the heat sink 17 in opposite directions to each other, but is not limited thereto.
- the third support protrusion 17A may be spaced apart from the first and second metal layers 13 and 15 in the second gap portion 19.
- the reflective member 23 is disposed around the heat sink 17.
- the reflective member 23 may be formed in a ring shape.
- the inner diameter of the ring may be equal to or smaller than the diameter of the heat sink 17.
- the reflective member 23 corresponds to the outer surface of the molding member 25.
- the reflective member 23 may be in contact with an outer side surface of the molding member 25.
- the reflective member 23 may be disposed between the protective layer 21 and the molding member 25.
- the reflective member 23 may include the first and second metal layers 13 and 15 and the protective member. Layer 21. Since the reflective member 23 reflects the light emitted through the molding member 25, the light extraction efficiency and the brightness of the light emitting device can be improved.
- the reflective member 23 may be formed to be the same or thicker than the thickness of the protective layer 21. Accordingly, the light loss can be reduced by the reflective member 23.
- the reflective member 23 may be in contact with, for example, the first and second bonding regions 12A and 12B on the first and second bonding regions 12A and 12B.
- the reflective member 23 may be disposed in the first gap portion 18.
- the reflective member 23 may include a resin material such as silicon or epoxy, and a metal oxide may be added therein.
- the reflective member 23 may be formed of an insulating material.
- the reflective member 23 is a material having a refractive index higher than that of the molding member, and the metal oxide includes, for example, TIO 2 , Al 2 O 3 , or SiO 2 .
- the metal oxide may be added at 5wt% or more in the half-water member 23.
- the reflective member 23 exhibits a reflectance of 50% or more, for example, 78% or more with respect to the light emitted from the light emitting chips 31, 32, and 33.
- the height or thickness of the reflective member 23 is 600 ⁇ 20 ⁇ m, the width may be formed in the range of 1000 ⁇ 100 ⁇ m. When the height of the reflective member 23 is too low or high, the light reflection efficiency may be lowered. In addition, when the width of the reflective member 23 is too narrow, it is difficult to form, and when too wide, the heat radiation efficiency may be
- the plurality of light emitting parts 30 and 30A are disposed on the heat sink 17.
- the plurality of light emitting parts 30 and 30A may be electrically connected to the first and second metal layers 13 and 15 and may be connected to each other in parallel.
- Each of the light emitting parts 30 and 30A may pass through the plurality of light emitting chips 31, 32, 33, 41, 42, and 43 and the outer side surface of the molding member 25 to pass through the first and second metal layers 13.
- a plurality of wires 71, 73, 81, 83 optionally connected to.
- the wires 71, 73, 81, and 83 may be connected to the first and second metal layers 13 and 15 passing through the reflective member 23.
- the wires 71, 73, 81, and 83 may be in contact with the reflective member 23 and the molding member 25.
- An arrangement direction of at least one of the plurality of light emitting parts 30 and 30A may be arranged so as not to be parallel to straight lines passing through both ends of each of the plurality of wires 71, 73, 81, and 83.
- the plurality of light emitting units 30 and 30A include, for example, first and second light emitting units 30 and 30A.
- first light emitting unit 30 a plurality of light emitting chips 31, 32, and 33 are connected in series.
- the second light emitting unit 30A is spaced apart from the first light emitting unit 30, and a plurality of light emitting chips 41, 42, and 43 are connected in series.
- Each of the first and second light emitting units 30 and 30A may be defined as a light emitting chip array, but is not limited thereto.
- any one of the first and second light emitting parts 30 and 30A may not be disposed or may be disposed in the center area of the heat sink 17.
- Each of the light emitting units 30 and 30A may have five or more light emitting chips connected in series.
- Each of the light emitting chips is a light source, and selectively emits light in a wavelength band from ultraviolet rays to visible rays.
- the light emitting chips 31, 32, 33, 41, 42, and 43 may include any one of an ultraviolet (Ultraviolet) LED chip, a green LED chip, a block LED chip, and a red LED chip. Phosphors may be applied to the light emitting regions of the light emitting chips 31, 32, 33, 41, 42, and 43, but embodiments are not limited thereto.
- the molding member 25 is disposed on the heat sink 17.
- the molding member 25 covers the plurality of light emitting parts 30 and 30A.
- the molding member 25 may be formed of a transparent or transparent material such as silicon or epoxy.
- the molding member 25 may include at least one of a hard silicone resin, a soft silicone resin, and a silicone rubber.
- the molding member 25 may have a side cross section formed in a hemispherical shape, but is not limited thereto.
- the outer side surface of the molding member 25 may be formed in a ring shape and may be in contact with the reflective member 23.
- the molding member 25 covers the light emitting chips 31, 32, 33, 41, 42, and 43 disposed on the heat sink 17.
- the molding member 25 covers the wires 71, 73, 75, 81, 83, 85.
- the molding member 25 may be disposed in the first gap portion 18.
- a phosphor may be added in the molding member 25, and the phosphor may include at least one of a yellow phosphor, a green phosphor, a blue phosphor, and a red phosphor.
- a lanthanoid system such as Eu or Ce may be used.
- Rare earth aluminate mainly activated by phosphor, alkaline earth metal aluminate phosphor, alkaline earth silicate, alkaline earth sulfide, alkaline earth thigallate, alkaline earth silicon nitride, germanium acid salt, or lanthanoid element such as Ce, Organic and organic complexes mainly activated by rare earth silicates or lanthanoids such as Eu At least one selected from sieves and the like.
- the molding member 25 may include a filler therein, but is not limited thereto.
- the outer contour of the molding member 25 may be formed in a circular shape.
- the outer spherical surface of the molding member 25 may be in contact with the reflective member 23.
- the molding member 25 and the reflective member 23 may be formed of different kinds of silicon materials. Accordingly, the adhesive force between the molding member 25 and the reflective member 23 may be improved.
- the reflective member 23 may serve as a dam for suppressing the expansion of the molding member 25.
- the reflective member 25 may prevent the molding member 25 from overflowing.
- a protection chip (not shown) may be disposed on at least one of the heat dissipation plate 17 and the first and second metal layers 13 and 15, but is not limited thereto.
- the first light emitting part 30 may include a first light emitting chip 31 adjacent to the first metal layer 13, a second light emitting chip 32 adjacent to the second metal layer 15, and the first light emitting chip 32. And a plurality of third light emitting chips 33 connected between the second light emitting chips 31 and 32, and a first wire 71 connected between the first light emitting chip 31 and the first metal layer 13. And a second wire 73 connected between the second light emitting chip 32 and the second metal layer 15.
- the first light emitting part 30 may include a connection member 75 connecting the plurality of third light emitting chips 33, and the connection member 75 may include a wire.
- both ends P1 and P2 of the first wire 71 are connected to the first light emitting chip 31 and the first metal layer 13. Both ends P3 and P4 of the second wire 73 are connected to the second light emitting chip 32 and the second metal layer 15.
- the second end P2 of the first wire 71 is bonded to the first bonding region 12A of the first metal layer 13, and the second end P4 of the second wire 73 is connected to the first wire 71. It is bonded to the second bonding region 12B of the second metal layer 15.
- a plurality of light emitting chips may be connected in series.
- the plurality of third light emitting chips 33 may be arranged in one row, or may be arranged in two rows or three rows or more.
- the plurality of third light emitting chips 33 are connected to each other by the connecting member 75.
- the first and second light emitting chips 31 and 32 are chips disposed on the input and output sides of the first light emitting unit 30. At least one of the plurality of third light emitting chips 33 may be disposed in parallel or on the same line as a straight line passing through the centers of the first and second light emitting chips 31 and 32.
- the second light emitting part 30A includes a fourth light emitting chip 41 adjacent to the first metal layer 13, a fifth light emitting chip 42 adjacent to the second metal layer 15, and the fourth and fifth light emitting chips 42.
- a plurality of sixth light emitting chips 43 connected between the five light emitting chips 41 and 42, a third wire 81 connected between the fourth light emitting chip 41 and the first metal layer 13, and And a fourth wire 83 connected between the fifth light emitting chip 42 and the second metal layer 15.
- the second light emitting part 30A may include a connection member 85 connecting the plurality of sixth light emitting chips 43, and the connection member 85 may include a wire.
- Both ends of the third wire 81 are connected to the fourth light emitting chip 41 and the first metal layer 13. Both ends of the fourth wire 83 are connected to the fifth light emitting chip 42 and the second metal layer 15.
- the third wire 81 is bonded to the first bonding region 12A of the first metal layer 13, and the fourth wire 83 is the second bonding region 12B of the second metal layer 15. Is bonded to.
- a plurality of light emitting chips for example, may be connected in series.
- the plurality of sixth light emitting chips 43 may be arranged in one row, or arranged in two rows or three rows or more.
- the plurality of sixth light emitting chips 43 may be connected to each other by a connection member 85.
- the fourth and fifth light emitting chips 41 and 42 are chips disposed on the input and output sides of the second light emitting unit 30A. At least one of the plurality of sixth light emitting chips 43 may be disposed in parallel or on the same line as a straight line passing through the centers of the fourth and fifth light emitting chips 41 and 42.
- Each of the first to fourth wires 71, 73, 81, and 83 contacts the molding member 25 and the reflective member 23.
- Each of the first to fourth wires 71, 73, 81, and 83 is coupled to the molding member 25 and the reflective member 23.
- Each of the first to fourth wires 71, 73, 81, and 83 may protrude through the outer spherical surface of the molding member 25 and extend into the reflective member 23.
- the distance E2 between the second end P2 of the first wire 71 and the fourth end P4 of the second wire 73 may be equal to or smaller than the diameter E1 of the heat sink 17. But it is not limited thereto.
- the first wire 71 may extend in the radial direction from the first light emitting chip 31 with respect to the center of the heat sink 17.
- the second wire 73 may extend in a radial direction from the second light emitting chip 32 with respect to the center of the heat sink 17.
- the third wire 81 may extend in a radial direction from the fourth light emitting chip 41 with respect to the center of the heat sink 17.
- the fourth wire 83 may extend in a radial direction from the sixth light emitting chip 43 with respect to the center of the heat sink 17.
- the first to fourth wires 71, 73, 81, and 83 may extend in a radial direction with respect to the center of the heat sink 17.
- the first to fourth wires 71, 73, 81, and 83 extend in a radial direction from the center of the molding member 25.
- the first straight line passing through both ends P1 and P2 of the first wire 71 may extend in a radial direction with respect to the center of the heat sink 17 or the molding member 25.
- a second straight line passing through both ends P3 and P4 of the second wire 73 may extend in a radial direction with respect to the center of the heat sink 17 or the molding member 25.
- a third straight line passing through both ends of the third wire 81 may extend in a radial direction with respect to the center of the heat sink 17 or the molding member 25.
- a fourth straight line passing through both ends of the fourth wire 83 may extend in a radial direction with respect to the center of the heat sink 17 or the molding member 25.
- An angle R1 between a first straight line connecting both ends of the first wire 71 and a second straight line connecting both ends of the second wire 73 may be formed at an obtuse angle.
- An angle between a third straight line connecting both ends of the third wire 81 and a fourth straight line connecting both ends of the fourth wire 83 may be formed at an obtuse angle.
- An angle R2 between the first straight line and the third straight line may be formed at an acute angle.
- An angle between the second straight line and the fourth straight line may be formed at an acute angle.
- the height of the high point of the first wire 71 and the second wire 73 may be higher than the height of the high point of the connection member 75.
- An interval T1 between the high points of the first and second wires 71 and 73 and the top surfaces of the first and second light emitting chips 31 and 32 may be in a range of 180 ⁇ m to 200 ⁇ m.
- High points of the first and second wires 71 and 73 are located higher in the range of 30 ⁇ m to 50 ⁇ m than the high point of the connecting member 75.
- the heights of the high points of the third and fourth wires 81 and 83 may be higher than the heights of the high points of the connecting member 85, for example, higher than 30 ⁇ m to 50 ⁇ m.
- the first to fourth wires 71, 73, 81, 83 By placing the height of the high point of the first to fourth wires (71, 73, 81, 83) higher than the high point of the other connecting member (75, 85), according to the expansion and contraction of the molding member 25, the first The impact transmitted to the fourth wires 71, 73, 81, and 83 may be reduced.
- both ends of each of the first to fourth wires 71, 73, 81, and 83 are arranged in the same direction as the expansion direction and the contraction direction of the molding member 25, thereby preventing thermal deformation of the molding member 25.
- the impact transmitted to the first and second wires 71 and 73 can be reduced. That is, the first to fourth wires 71, 73, 81, and 83 are connected in a radial bonding manner to minimize the tensile force transmitted from the molding member 25.
- the first ends P1 and P3 of the first and second wires 71 and 73 are bonded to the first and second light emitting chips 31 and 32. And is disposed in the molding member 25.
- the second end P2 of the first wire 71 is bonded to the first bonding region 12A of the first metal layer 13, and the second end P4 of the second wire 73 is It is bonded to the second bonding region 12B of the second metal layer 15.
- the second ends P2 and P4 of the first and second wires 71 and 73 are disposed in the reflective member 23.
- First ends P1 and P3 of the first and second wires 71 and 73 are disposed in the molding member 25.
- the first and second wires 71 and 73 are disposed in the reflective member 23 and the molding member 25, so that the first and second wires 71, 73 may differ due to thermal expansion differences between different resin members. 73) can reduce the tensile force transmitted to.
- the first wire 71 among the first to fourth wires 71, 73, 81, and 83 according to the embodiment will be described in detail with reference to FIGS. 4 and 5.
- the second to fourth wires 73, 81, and 83 will be referred to the description of the first wire 71 below.
- the first wire 71 extends in the direction of the first angle ⁇ 1 with respect to the first tangent B1 passing through a point of the circular contour of the heat sink 17. do.
- the first angle ⁇ 1 may be in a range of 85 degrees to 95 degrees, and the closer to 90 degrees the first angle ⁇ 1 is to the molding member 25 transmitted to the first wire 71. The impact caused by this can be minimized. That is, the first wire 71 has a first tangential line through which a first straight line connecting the first end P1 and the second end P2 passes through an outer contour line or an outline line of the heat dissipation plate 17 in a circle shape.
- first wire 71 may be formed at an angle perpendicular to or close to the normal to B1), for example at an angle in the range from 85 degrees to 95 degrees.
- the linear distance D3 between the first end P1 and the second end P2 of the first wire 71 may be shorter than the linear distance D2 of the wire 71a of the comparative example connected in the other direction.
- a straight line passing through both ends P1 and P2 of the first wire 71 may be tilted at an angle ⁇ 11 of 5 degrees or more from a straight line passing through both ends of the wire 71a of the comparative example.
- the straight line passing through both ends of the wire 71a of the comparative example may be defined as a straight line passing through the centers of the first and second light emitting chips 31 and 32 in FIG. 1.
- the width D1 of the first bonding region 12A or the second bonding region 12B may be in the range of 280 ⁇ m to 320 ⁇ m, and the width D1 may be defined by the width of the first wire 71. It may be formed to a width for securing the space of the second end (P2).
- the second to fourth wires 73, 81, and 83 are connected to a second tangent line passing through an arbitrary point of an outline of the heat sink 17, like the first wire 71. It may be arranged at an angle of, for example, 85 degrees to 95 degrees at a normal or close to normal. External impact transmitted to the second to fourth wires 73, 81 and 83 when a straight line passing through both ends of the second to fourth wires 73, 81 and 83 is normal or perpendicular to the second tangent line. This can be minimized.
- Detailed descriptions of the second to fourth wires 73, 81, and 83 will be described with reference to the description of the first wire 71.
- Each of the first to fourth wires 71, 73, 81, and 83 may be formed in a normal direction, for example, 90 degrees with respect to a tangent passing through a point of the contour of the heat sink 17.
- the first straight line X2 through which both ends of the first wire 71 pass may have an angle ⁇ 3 with a straight line X1 of less than 90 degrees, for example, between 10 degrees and 80 degrees.
- the straight line X1 extends in a straight line along the first side surface S1 of the first light emitting chip 31, and the straight line Y1 is the first side surface S1 of the first light emitting chip 31. It extends in a straight line along the second side (S2) adjacent to.
- the first straight line X2 and the angle ⁇ 3 passing through both ends of the first wire 71 may vary depending on the position of the first light emitting chip 31.
- the second side surface S2 may be formed to have a length equal to or longer than the length of the first side surface S1.
- the first straight line X2 passing through both ends of the first wire 71 may be arranged to be shifted more than 5 degrees from a straight line passing through the centers of the first and second light emitting chips 31 and 32.
- the first straight line X2 passing through both ends of the first wire 71 is 5 degrees or more with respect to the straight line Y1 passing through the second side surfaces S2 of the first and second light emitting chips 31 and 32. It may be displaced.
- the first to fourth wires 71, 73, 81, and 83 may be formed from the first, second, fourth, and fifth light emitting chips 31, 32, 41, and 42 disposed on the heat sink 17. It extends in the radial direction with respect to the center of the heat sink 17. Accordingly, the first to fourth wires 71, 73, 81, and 83 may have improved tensile strength in the molding member 25.
- the circuit board 10 is bent from the center to the downward direction as a dotted line 10A.
- the circuit board 10 is restored upward as shown by a dotted line 10B.
- the first to fourth wires 71, 73, 81, and 83 may be disposed in the same direction as the expansion or contraction direction of the molding member 25, thereby minimizing external impact.
- the circuit board 10 when the molding member 25 is expanded, the circuit board 10 is bent in a difference Z1 of 50 ⁇ m or more in the Z-axis direction, and is bent in a difference Z2 of 70 ⁇ m or more in the Z-axis direction when it is contracted. All.
- the difference between the expansion and contraction of the molding member 25 may vary depending on the material of the body 11, but is not limited thereto.
- the bonding member of the wire 71a may be separated from the contracting and expanding direction of the molding member 25. Can be.
- the bonding portion of the wire falls, the light emitting chips do not drive, and the reliability of the light emitting device may be degraded.
- FIG. 8 is an example illustrating a maximum displacement and a minimum displacement distance in the vertical direction Z in the circuit board 10 shown in FIGS. 6 and 7.
- 9 is a graph comparing equivalent stresses (Vonmises stress) at temperatures in a boundary region between a reflective member and a molding member on a circuit board according to an embodiment, and FIG. It is a graph showing the maximum deformation by temperature in the boundary region between them.
- the equivalent stress represents Vonmises stress and represents the magnitude of the torsional energy by the stress components at one point of the boundary region. Even when such a circuit board is deformed by the molding member, the wires 71, 73, 81, and 83 passing through the outer spherical surface of the molding member may be prevented from boiling.
- the temperature is taken as an example of -40 ° C or 100 ° C.
- the first to fourth wires 71, 73, 81, and 83 may extend in a radial direction from the center of the molding member 25.
- the first to fourth wires 71, 73, 81, and 83 may reduce the tensile force transmitted from the molding member 25, and prevent the bonding portion from falling off from an external impact.
- the first to fourth wires 71, 73, 81, and 83 may be protected from the molding member 25.
- the comparative example is a case in which the wire is bonded together with the dotted wire of FIG. Or a second wire).
- the high point height of the wire of an Example shall be the height of 180 micrometers-220 micrometers, and the high point height of the wire of a comparative example shall be 150 micrometers-170 micrometers.
- the cycle is one cycle of one repetition at a predetermined temperature (-40oC to 100 oC) among reliability items, and the failure of the comparative example and the embodiment is checked at 100 cycles, 200 cycles, 300 cycles, 400 cycles, and 500 cycles. It is.
- the wire defect gradually increases from 100 cycles to 500 cycles. For example, six wire failures occur at 400 cycles out of 23 wires, and ten wire failures occur at 500 cycles. Is generated.
- the embodiment does not have a defective wire regardless of the period. Therefore, it is possible to prevent the defect of the wire in the bonding method of the wire of the embodiment compared to the bonding method of the wire of the comparative example. That is, the wires connected to the bonding region of the light emitting chip and the first and second metal layers may withstand the external impact well.
- the reflective member 23A may be in contact with the heat dissipation plate 17. Therefore, since the reflective member 23A is filled in the first gap portion 18 and extends to the upper surface of the heat dissipation plate 17, the adhesive force may be enhanced.
- the inner surface of the reflective member 23A for example, the surface in which the molding member 25 is in contact, may be a curved surface or an inclined surface.
- the molding member 25 includes an extension 25A extending on the first and second bonding regions 12A and 12B around the periphery. This does not form the reflective member separately, but covers the second ends of the first and second wires 71 and 73 with the extension portion 25A of the molding member 25. In this case, the wires may be covered with the same material.
- FIG. 13 is another example of FIG. 1, wherein the plurality of light emitting parts 30, 30A, 30B includes at least three first to third light emitting parts 30, 30A, and 30B, for example.
- the first and second light emitting units 30 and 30A will be described with reference to FIG. 1.
- the third light emitting part 30B is disposed between a center area of the heat sink 17, for example, the first light emitting part 30 and the second light emitting part 30A.
- the third light emitting part 30B includes a seventh light emitting chip 51 adjacent to the first metal layer 13, an eighth light emitting chip 52 adjacent to the second metal layer 15, and the seventh and fifth elements.
- a plurality of ninth light emitting chips 53 connected between the eight light emitting chips 51 and 52, a fifth wire 77 connected between the seventh light emitting chip 51 and the first metal layer 13, and And a sixth wire 78 connected between the eighth light emitting chip 52 and the second metal layer 15.
- the third light emitting part 30B may include a connection member connecting the plurality of ninth light emitting chips 53, and the connection member may include a wire.
- Both ends of the fifth wire 77 are connected to the seventh light emitting chip 51 and the first metal layer 13. Both ends of the sixth wire 78 are connected to the eighth light emitting chip 52 and the second metal layer 15.
- the fifth wire 77 is bonded to the first bonding region 12A of the first metal layer 13, and the sixth wire 78 is the second bonding region 12B of the second metal layer 15. Is bonded to.
- a plurality of light emitting chips 53 may be connected in series.
- the plurality of ninth light emitting chips 53 may be arranged in one row, or may be arranged in two rows or three rows or more.
- the plurality of ninth light emitting chips 53 are connected to each other by a connecting member.
- the seventh and eighth light emitting chips 51 and 52 are chips disposed on the input and output sides of the third light emitting unit 30B.
- Each of the first to sixth wires 71, 73, 81, 83, 77, and 78 is in contact with the molding member 25 and the reflective member 23.
- Each of the first to sixth wires 71, 73, 81, 83, 77, and 78 is coupled to the molding member 25 and the reflective member 23.
- Each of the first to sixth wires 71, 73, 81, 83, 77, and 78 may protrude through an outer spherical surface of the molding member 25 and may extend into the reflective member 23.
- the fifth wire 77 may extend in the radial direction from the seventh light emitting chip 51 with respect to the center of the heat sink 17.
- the eighth wire 78 may extend in a radial direction from the eighth light emitting chip 52 with respect to the center of the heat sink 17.
- the first to sixth wires 71, 73, 81, 83, 77, and 78 may extend in a radial direction with respect to the center of the heat sink 17.
- the first to sixth wires 71, 73, 81, 83, 77, and 78 extend in a radial direction from the center of the molding member 25.
- a straight line passing through both ends of the fifth wire 77 may extend in a radial direction with respect to the center of the heat sink 17 or the molding member 25.
- a straight line passing through both ends of the eighth wire 78 may extend in a radial direction with respect to the center of the heat sink 17 or the molding member 25.
- An angle between a straight line connecting both ends of the first wire 71 or the third wire 81 and a straight line connecting both ends of the fifth wire 77 may be formed at an acute angle, for example, 45 degrees or less.
- An angle between a straight line connecting both ends of the first wire 71 or the third wire 81 and a straight line connecting both ends of the sixth wire 78 may be formed to be less than an acute angle, for example, 45 degrees or less.
- an angle R1 between a first straight line connecting both ends of the first wire 71 and a second straight line connecting both ends of the second wire 73 may be formed at an obtuse angle.
- An angle between a third straight line connecting both ends of the third wire 81 and a fourth straight line connecting both ends of the fourth wire 83 may be formed at an obtuse angle.
- An angle R2 between the first straight line and the third straight line may be formed at an acute angle.
- An angle between the second straight line and the fourth straight line may be formed at an acute angle.
- Each of the fifth and sixth wires 77 and 78 may extend in a range of 85 degrees to 95 degrees, for example, in a normal direction, with respect to a tangent passing through a point of the contour of the heat sink 17.
- FIG. 14 is a plan view illustrating a light emitting device according to the second embodiment
- FIG. 15 is a partially enlarged view of the light emitting device of FIG. 14.
- the same parts as the first embodiment will be described with reference to the description of the first embodiment.
- the light emitting device includes a body 11, a first metal layer 13 and a second metal layer 15 disposed on an upper surface of the body 11; A heat sink 17 disposed between the first and second metal layers 13 and 15 on an upper surface of the body 11; A plurality of light emitting parts 30, 30A, and 30B disposed on the heat sink 17; A reflection member 23 disposed around the heat sink 17; And a molding member 25 on the heat sink 17. Wires 71, 73, 81, and 83 connected to the first and second metal layers 13 and 15 and disposed radially around the heat sink 17 are included.
- the plurality of light emitting parts 30, 30A, and 30B may include at least three, and for example, the first light emitting part 30 and the heat sink 17 are disposed in a first area of the heat sink 17.
- the second light emitting unit 30A disposed in the second region, and the third light emitting unit 30, 30A, 30B disposed in the region between the first and second light emitting units 30 and 30A are included.
- the first light emitting unit 30 is connected to a first light emitting chip 31A, a second light emitting chip 32A, a plurality of third light emitting chips 33, a first wire 71, and a second wire 73. And a member 75.
- the second light emitting part 30A is connected to the fourth light emitting chip 41A, the fifth light emitting chip 42A, the plurality of sixth light emitting chips 43, the third wire 81, the fourth wire 83, and the like. And a member 85.
- Two side surfaces of the first light emitting chip 31A may be disposed in parallel with a first straight line passing through both ends of the first wire 71.
- the two side surfaces of the first light emitting chip 31A may be disposed in the same direction as the extending direction of the first straight line.
- Two of the side surfaces of the second light emitting chip 32A are disposed in parallel with a second straight line passing through both ends of the second wire 73.
- Two side surfaces of the second light emitting chip 32A are disposed in the same direction as an extension direction of a second straight line of the second wire 73.
- At least one side surface of the first and second light emitting chips 31A and 32A may be tilted with the direction in which the plurality of third light emitting chips 33 are arranged, or the first and second light emitting chips 31A and 32A may be disposed.
- Tilt is arranged from a straight line passing through the center of.
- Third and fourth straight lines connected to both ends of the third and fourth wires 81 and 83 extend in the same direction as an extension direction of at least one side of each of the fourth and fifth light emitting chips 41A and 42A. .
- the angle between the straight line X1 horizontal to the first side surface S1 and the straight line Y1 horizontal to the second side surface S2 may be perpendicular to the first light emitting chip 31A.
- the planar direction of the second side surface S2 of the first light emitting chip 31A is disposed in the same direction as the extension direction of the first straight line X3 passing through both ends of the first wire 71.
- an angle ⁇ 4 between the first straight line X3 and the straight line X1 from which the first wire 71 extends may be formed in a range of 30 degrees to 70 degrees.
- the first straight line X3 may be a straight line through which the first end P5 of the third wire 75 connected to the first light emitting chip 31A passes.
- the first straight line X3 passing through both ends of the first wire 71 is disposed in parallel with a straight line parallel to the second side surface S2 of the first light emitting chip 31A, and with respect to the tangent B1. It may be formed in an angle close to the normal, for example, in the range from 85 degrees to 95 degrees.
- a first straight line X3 passing through both ends of the first wire 71 may be disposed in a normal line with respect to the tangent B1. When the first straight line X3 passing through both ends of the first wire 71 is disposed in the normal direction with respect to the tangent B1, the impact transmitted from the outside may be minimized.
- At least one of the first, second, fourth, and fifth light emitting chips 31A, 32A, 41A, and 42A of the first and second light emitting parts 30 and 30A may be formed by the third and sixth light emitting chips 33 and 43. It can be arranged tilted from the direction in which it is arranged.
- 16 is a view illustrating an example of a light emitting chip of a light emitting device according to the embodiment.
- the light emitting device may include a substrate 111, a buffer layer 113, a first conductive semiconductor layer 115, an active layer 117, a second conductive semiconductor layer 119, an electrode layer 131, and a second light emitting device.
- the first electrode pad 141 and the second electrode pad 151 are included.
- the substrate 111 may be a light transmissive, insulating or conductive substrate, for example, sapphire (Al 2 O 3 ), SiC, Si, GaAs, GaN, ZnO, Si, GaP, InP, Ge, Ga 2 O 3 , At least one of LiGaO 3 may be used.
- a plurality of protrusions may be formed on an upper surface of the substrate 111, and the plurality of protrusions may be formed by etching the substrate 111 or may be formed of a light extraction structure such as a separate roughness.
- the protrusion may include a stripe shape, a hemispherical shape, or a dome shape.
- the thickness of the substrate 111 may be formed in the range of 30 ⁇ m ⁇ 300 ⁇ m, but is not limited thereto.
- a buffer layer 113 is formed on the substrate 111, and the buffer layer 113 may be formed of at least one layer using group 2 to group 6 compound semiconductors.
- the buffer layer 113 includes a semiconductor layer using a group III-V group compound semiconductor, for example, In x Al y Ga 1-xy N (0 ⁇ x ⁇ 1, 0 ⁇ y ⁇ 1, 0 ⁇ x + y
- a semiconductor having a compositional formula of ⁇ 1) includes at least one of compound semiconductors such as GaN, InN, AlN, InGaN, AlGaN, InAlGaN, AlInN and the like.
- the buffer layer 113 may be formed in a super lattice structure by alternately arranging different semiconductor layers.
- the buffer layer 113 may be formed to alleviate the difference in lattice constant between the substrate 111 and the nitride-based semiconductor layer, and may be defined as a defect control layer.
- the buffer layer 113 may have a value between lattice constants between the substrate 111 and the nitride-based semiconductor layer.
- the buffer layer 113 may be formed of an oxide such as a ZnO layer, but is not limited thereto.
- the buffer layer 113 may be formed in the range of 30 to 500 nm, but is not limited thereto.
- a low conductive layer is formed on the buffer layer 113, and the low conductive layer is an undoped semiconductor layer, and has a lower conductivity than that of the first conductive semiconductor layer.
- the low conductive layer may be implemented as a GaN-based semiconductor using a group III-V compound semiconductor, and the undoped semiconductor layer may have a first conductivity type even without intentionally doping a conductive dopant.
- the undoped semiconductor layer may not be formed, but is not limited thereto.
- the first conductive semiconductor layer 115 may be formed on the buffer layer 113.
- the first conductive semiconductor layer 115 is implemented as a Group III-V compound semiconductor doped with a first conductive dopant, and is, for example, In x Al y Ga 1-xy N (0 ⁇ x ⁇ 1, 0 ⁇ y It can be formed from a semiconductor material having a composition formula of ⁇ 1, 0 ⁇ x + y ⁇ 1).
- the first conductive dopant is an N-type dopant and includes Si, Ge, Sn, Se, and Te.
- a semiconductor layer may be formed between the buffer layer 113 and the first conductive semiconductor layer 115, and the semiconductor layer may have a superlattice structure in which different first and second layers are alternately arranged.
- the thickness of the first layer and the second layer may be formed to a number A or more.
- a first conductive clad layer (not shown) may be formed between the first conductive semiconductor layer 115 and the active layer 117.
- the first conductive clad layer may be formed of a GaN-based semiconductor, and the band gap may be formed to be greater than or equal to the band gap of the barrier layer of the active layer 117.
- the first conductive clad layer serves to constrain the carrier.
- An active layer 117 is formed on the first conductive semiconductor layer 115.
- the active layer 117 may be formed of at least one of a single quantum well, a multiple quantum well (MQW), a quantum line, and a quantum dot structure.
- a well layer / barrier layer is alternately arranged, and the period of the well layer / barrier layer is 2 using a stacked structure of InGaN / GaN, AlGaN / GaN, InGaN / AlGaN, InGaN / InGaN. It may be formed in ⁇ 30 cycles.
- a second conductive cladding layer is formed on the active layer 117, and the second conductive cladding layer has a higher band gap than the band gap of the barrier layer of the active layer 117, and is a group III-V compound semiconductor.
- the second conductive cladding layer may be formed of a GaN-based semiconductor.
- a second conductive semiconductor layer 119 is formed on the second conductive cladding layer, and the second conductive semiconductor layer 119 includes a second conductive dopant.
- the second conductive semiconductor layer 119 may be formed of any one of compound semiconductors such as GaN, InN, AlN, InGaN, AlGaN, InAlGaN, AlInN, and the like.
- the second conductive dopant may include Mg, Zn, Ca, Sr, and Ba as a P-type dopant.
- the conductive type of the first conductive type and the second conductive type may be formed to be opposite to the above structure.
- the second conductive type semiconductor layer 119 may be an N type semiconductor layer
- the first conductive semiconductor layer 115 may be implemented as a P-type semiconductor layer.
- an N-type semiconductor layer which is a third conductive semiconductor layer having a polarity opposite to that of the second conductive type, may be further formed on the second conductive semiconductor layer 119.
- the light emitting device may define the first conductive semiconductor layer 115, the active layer 117, and the second conductive semiconductor layer 119 as a light emitting structure 120, and the light emitting structure 120 may be an NP junction.
- the structure, the PN junction structure, the NPN junction structure, or the PNP junction structure can be implemented with any of the structures.
- the N-P and P-N junctions have an active layer disposed between the two layers, and the N-P-N junction or P-N-P junction includes at least one active layer between the three layers.
- a first electrode pad 141 is formed on the first conductive semiconductor layer 115, and an electrode layer 131 and a second electrode pad 151 are formed on the second conductive semiconductor layer 119.
- the electrode layer 131 is a current spreading layer and may be formed of a material having transparency and electrical conductivity.
- the electrode layer 131 may be formed at a refractive index lower than that of the compound semiconductor layer.
- the electrode layer 131 is formed on the upper surface of the second conductive semiconductor layer 119, and the material may be indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (IZTO), or indium aluminum zinc oxide (IGZO), indium gallium zinc oxide (IGZO), indium gallium tin oxide (IGTO), aluminum zinc oxide (AZO), antimony tin oxide (ATO), gallium zinc oxide (GZO), ZnO, IrOx, RuOx, NiO, etc. It may be selected from, and may be formed of at least one layer. As another example, the electrode layer 131 may be formed of a reflective electrode layer, and the material may be selectively formed from a metal material such as, for example, Al, Ag, Pd, Rh, Pt, and Ir.
- a metal material such as, for example, Al, Ag, Pd, Rh, Pt, and Ir.
- the first electrode pad 141 and the second electrode pad 151 may be formed of Ti, Ru, Rh, Ir, Mg, Zn, Al, In, Ta, Pd, Co, Ni, Si, Ge, Ag, and Au. May be selected from among these optional alloys.
- An insulating layer may be further formed on the surface of the light emitting device, and the insulating layer may prevent an interlayer short of the light emitting structure 120 and prevent moisture penetration.
- the second electrode pad 151 may be formed on the second conductive semiconductor layer 119 and / or the electrode layer 131, and may include a second electrode pattern 153.
- the second electrode pattern 153 may have an arm structure or a finger structure branched from the second electrode pad 151.
- the second electrode pad 151 may include metal layers having characteristics of ohmic contact, an adhesive layer, and a bonding layer, and may be made of non-transmissive material, but is not limited thereto.
- the second electrode pad 151 When viewed from the top of the light emitting chip, the second electrode pad 151 is spaced apart from the width of one side of the first electrode pad 141 by one side of the light emitting chip, and the second electrode pattern 153 is disposed on the electrode layer.
- the light emitting chip may have a length greater than or equal to 1/2 of the width of one side of the light emitting chip.
- a portion of at least one of the second electrode pad 151 and the second electrode pattern 153 may be in ohmic contact with an upper surface of the second conductive semiconductor layer 119, but is not limited thereto.
- the first electrode pad 141 is formed in a first region A1 of an upper surface of the first conductive semiconductor layer 115, and the first region A1 is formed in the first conductive semiconductor layer 115.
- a portion of the second conductive semiconductor layer 119 and a portion of the active layer 117 is etched and a portion of the upper surface of the first conductive semiconductor layer 115 is exposed.
- an upper surface of the first conductive semiconductor layer 115 is a stepped area from the side surface of the active layer 117, and is formed at a position lower than the lower surface of the active layer 117.
- Grooves 125 are formed in the light emitting structure 120, and the grooves 125 are formed to have a depth at which the first conductive semiconductor layer 115 is exposed from an upper surface of the light emitting structure 120. Depths of the first region A1 and the groove 125 of the first conductive semiconductor layer 115 may be the same depth or different depths from the top surface of the light emitting structure 120.
- the first electrode pad 141 may be connected to a first electrode pattern disposed in the groove 125.
- wires are bonded to the first electrode pad 141 and the second electrode pad 151.
- the light emitting device or the light emitting device according to the embodiment may be applied to a lighting system.
- the lighting system includes a structure in which a plurality of light emitting elements are arranged, and includes a display device as shown in FIGS. 17 and 18 and a lighting device as shown in FIG. 19. have.
- 17 is an exploded perspective view of a display device having a light emitting device according to the embodiment.
- the display apparatus 1000 includes a light guide plate 1041, a light source module 1031 providing light to the light guide plate 1041, and a reflective member 1022 under the light guide plate 1041. ), An optical sheet 1051 on the light guide plate 1041, a display panel 1061, a light guide plate 1041, a light source module 1031, and a reflective member 1022 on the optical sheet 1051.
- the bottom cover 1011 may be included, but is not limited thereto.
- the bottom cover 1011, the reflective sheet 1022, the light guide plate 1041, and the optical sheet 1051 may be defined as a light unit 1050.
- the light guide plate 1041 diffuses light to serve as a surface light source.
- the light guide plate 1041 is made of a transparent material, for example, acrylic resin-based such as polymethyl metaacrylate (PMMA), polyethylene terephthlate (PET), polycarbonate (PC), cycloolefin copolymer (COC), and polyethylene naphthalate (PEN). It may include one of the resins.
- PMMA polymethyl metaacrylate
- PET polyethylene terephthlate
- PC polycarbonate
- COC cycloolefin copolymer
- PEN polyethylene naphthalate
- the light source module 1031 provides light to at least one side of the light guide plate 1041, and ultimately serves as a light source of the display device.
- the light source module 1031 may include at least one, and may provide light directly or indirectly at one side of the light guide plate 1041.
- the light source module 1031 includes a substrate 1033 and a light emitting device or a light emitting device 1035 according to the above-described embodiment, and the light emitting device or the light emitting device 1035 is disposed on the substrate 1033 at a predetermined interval. Can be arrayed.
- the substrate 1033 may be a printed circuit board (PCB) including a circuit pattern (not shown).
- the substrate 1033 may include not only a general PCB but also a metal core PCB (MCPCB, Metal Core PCB), a flexible PCB (FPCB, Flexible PCB) and the like, but is not limited thereto.
- MCPCB Metal Core PCB
- FPCB Flexible PCB
- the substrate 1033 may be removed.
- a part of the heat dissipation plate may contact the upper surface of the bottom cover 1011.
- the light emitting devices 1035 may be mounted on the substrate 1033 such that an emission surface from which light is emitted is spaced apart from the light guide plate 1041 by a predetermined distance, but is not limited thereto.
- the light emitting device 1035 may directly or indirectly provide light to a light incident part, which is one side of the light guide plate 1041, but is not limited thereto.
- the reflective member 1022 may be disposed under the light guide plate 1041.
- the reflective member 1022 may improve the brightness of the light unit 1050 by reflecting light incident to the lower surface of the light guide plate 1041 and pointing upward.
- the reflective member 1022 may be formed of, for example, PET, PC, or PVC resin, but is not limited thereto.
- the reflective member 1022 may be an upper surface of the bottom cover 1011, but is not limited thereto.
- the bottom cover 1011 may accommodate the light guide plate 1041, the light source module 1031, the reflective member 1022, and the like. To this end, the bottom cover 1011 may be provided with an accommodating part 1012 having a box shape having an upper surface opened thereto, but is not limited thereto. The bottom cover 1011 may be combined with the top cover, but is not limited thereto.
- the bottom cover 1011 may be formed of a metal material or a resin material, and may be manufactured using a process such as press molding or extrusion molding.
- the bottom cover 1011 may include a metal or non-metal material having good thermal conductivity, but is not limited thereto.
- the display panel 1061 is, for example, an LCD panel, and includes a first and second substrates of transparent materials facing each other, and a liquid crystal layer interposed between the first and second substrates.
- a polarizer may be attached to at least one surface of the display panel 1061, but the polarizer is not limited thereto.
- the display panel 1061 displays information by light passing through the optical sheet 1051.
- the display device 1000 may be applied to various portable terminals, monitors of notebook computers, monitors of laptop computers, televisions, and the like.
- the optical sheet 1051 is disposed between the display panel 1061 and the light guide plate 1041 and includes at least one light transmissive sheet.
- the optical sheet 1051 may include at least one of a sheet such as, for example, a diffusion sheet, a horizontal and vertical prism sheet, and a brightness enhancement sheet.
- the diffusion sheet diffuses the incident light
- the horizontal and / or vertical prism sheet focuses the incident light into the display area
- the brightness enhancement sheet reuses the lost light to improve the brightness.
- a protective sheet may be disposed on the display panel 1061, but is not limited thereto.
- the light guide plate 1041 and the optical sheet 1051 may be included as an optical member on the optical path of the light source module 1031, but are not limited thereto.
- FIG. 18 is a diagram illustrating a display device having a light emitting device according to an exemplary embodiment.
- the display device 1100 includes a bottom cover 1152, a substrate 1020 on which the light emitting device 1124 disclosed above is arranged, an optical member 1154, and a display panel 1155.
- the substrate 1020 and the light emitting device 1124 may be defined as a light source module 1160.
- the bottom cover 1152, the at least one light source module 1160, and the optical member 1154 may be defined as a light unit 1150.
- the bottom cover 1152 may include an accommodating part 1153, but is not limited thereto.
- the light source module 1160 includes a substrate 1020 and a plurality of light emitting devices 1124 arranged on the substrate 1020.
- the optical member 1154 may include at least one of a lens, a light guide plate, a diffusion sheet, horizontal and vertical prism sheets, and a brightness enhancement sheet.
- the light guide plate may be made of a PC material or a poly methyl methacrylate (PMMA) material, and the light guide plate may be removed.
- the diffusion sheet diffuses the incident light
- the horizontal and vertical prism sheets focus the incident light onto the display area
- the brightness enhancement sheet reuses the lost light to improve the brightness.
- the optical member 1154 is disposed on the light source module 1060 and performs surface light, or diffuses, condenses, or the like the light emitted from the light source module 1060.
- FIG. 19 is an exploded perspective view of a lighting apparatus having a light emitting device according to the embodiment.
- the lighting apparatus may include a cover 2100, a light source module 2200, a heat radiator 2400, a power supply unit 2600, an inner case 2700, and a socket 2800. Can be.
- the lighting apparatus according to the embodiment may further include any one or more of the member 2300 and the holder 2500.
- the light source module 2200 may include a light emitting device according to an embodiment.
- the cover 2100 may have a shape of a bulb or hemisphere, may be hollow, and may be provided in an open shape.
- the cover 2100 may be optically coupled to the light source module 2200 and coupled to the radiator 2400.
- the cover 2100 may have a coupling part coupled to the heat sink 2400.
- An inner surface of the cover 2100 may be coated with a milky paint having a diffusion material. Using the milky white material, light from the light source module 2200 may be scattered and diffused to be emitted to the outside.
- the cover 2100 may be made of glass, plastic, polypropylene (PP), polyethylene (PE), polycarbonate (PC), or the like.
- polycarbonate is excellent in light resistance, heat resistance, and strength.
- the cover 2100 may be transparent and opaque so that the light source module 2200 is visible from the outside.
- the cover 2100 may be formed through blow molding.
- the light source module 2200 may be disposed on one surface of the heat sink 2400. Thus, heat from the light source module 2200 is conducted to the heat sink 2400.
- the light source module 2200 may include a light emitting element 2210, a connection plate 2230, and a connector 2250.
- the member 2300 is disposed on an upper surface of the heat dissipator 2400, and includes a plurality of lighting elements 2210 and guide grooves 2310 into which the connector 2250 is inserted.
- the guide groove 2310 corresponds to the board and the connector 2250 of the lighting device 2210.
- the surface of the member 2300 may be coated or coated with a white paint.
- the member 2300 is reflected on the inner surface of the cover 2100 to reflect the light returned to the light source module 2200 side again toward the cover 2100. Therefore, it is possible to improve the light efficiency of the lighting apparatus according to the embodiment.
- the member 2300 may be made of an insulating material, for example.
- the connection plate 2230 of the light source module 2200 may include an electrically conductive material. Therefore, electrical contact may be made between the radiator 2400 and the connection plate 2230.
- the member 2300 may be formed of an insulating material to block an electrical short between the connection plate 2230 and the radiator 2400.
- the radiator 2400 receives heat from the light source module 2200 and heat from the power supply unit 2600 to radiate heat.
- the holder 2500 may block the accommodating groove 2719 of the insulating portion 2710 of the inner case 2700. Therefore, the power supply unit 2600 accommodated in the insulating unit 2710 of the inner case 2700 is sealed.
- the holder 2500 has a guide protrusion 2510.
- the guide protrusion 2510 may include a hole through which the protrusion 2610 of the power supply unit 2600 passes.
- the power supply unit 2600 processes or converts an electrical signal provided from the outside to provide the light source module 2200.
- the power supply unit 2600 is accommodated in the accommodating groove 2725 of the inner case 2700, and is sealed in the inner case 2700 by the holder 2500.
- the power supply unit 2600 may include a protrusion 2610, a guide unit 2630, a base 2650, and an extension unit 2670.
- the guide part 2630 has a shape protruding outward from one side of the base 2650.
- the guide part 2630 may be inserted into the holder 2500.
- a plurality of parts may be disposed on one surface of the base 2650.
- the plurality of components may include, for example, a DC converter, a driving chip for controlling the driving of the light source module 2200, an electrostatic discharge (ESD) protection element for protecting the light source module 2200, and the like. It is not limited to.
- the extension part 2670 has a shape protruding outward from the other side of the base 2650.
- the extension part 2670 is inserted into the connection part 2750 of the inner case 2700 and receives an electrical signal from the outside.
- the extension part 2670 may be provided to be equal to or smaller than the width of the connection part 2750 of the inner case 2700.
- the extension 2670 may be electrically connected to the socket 2800 through a wire.
- the inner case 2700 may include a molding unit together with the power supply unit 2600 therein.
- the molding part is a part where the molding liquid is hardened, so that the power supply part 2600 can be fixed inside the inner case 2700.
- the embodiment can improve the reliability of the light emitting device.
- the light emitting device of the embodiment may be applied to lighting devices such as a lighting lamp, an indoor lamp, an outdoor lamp, an indicator lamp, and a conductive lamp using the LED.
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
주기 | 0 | 100 | 200 | 300 | 400 | 500 |
비교 예(불량/수량) | 0/23 | 1/23 | 1/23 | 3/23 | 6/23 | 10/23 |
실시 예(불량/수량) | 0/22 | 0/22 | 0/22 | 0/22 | 0/22 | 0/22 |
Claims (16)
- 몸체;상기 몸체의 상면에 배치된 제1 및 제2금속층;상기 제1 및 제2금속층 사이에 배치되며 원 형상의 외곽선을 갖는 방열 판;상기 방열 판 상에 배치된 복수의 발광부;상기 제1 및 제2금속층 상에 배치되며 상기 복수의 발광부와 전기적으로 연결된 제1 및 제2본딩 영역; 및상기 방열 판 상에 배치되고 상기 복수의 발광부를 덮는 몰딩 부재를 포함하며,상기 복수의 발광부의 각각은 서로 연결된 복수의 발광 칩; 및 상기 복수의 발광 칩을 상기 제1 및 제2본딩 영역에 전기적으로 연결하는 복수의 와이어를 포함하며,상기 각 발광부의 복수의 와이어는 상기 방열 판의 중심으로부터 방사 방향으로 배열되는 발광 소자.
- 제1항에 있어서,상기 몰딩 부재의 외측 둘레에 배치된 반사 부재를 포함하며,상기 복수의 와이어는 상기 반사 부재의 영역 아래에 배치된 상기 제 1 및 제2금속층의 제1 및 제2본딩 영역에 연결되는 발광 소자.
- 제1항 또는 제2항에 있어서,상기 복수의 발광부 중 적어도 하나는 상기 복수의 와이어 각각의 양단을 지나는 직선들이 서로 평행하지 않게 배열된 발광 소자.
- 제1항 또는 제2항에 있어서,상기 복수의 발광부는 상기 방열부의 제1영역에 배치된 제1발광부; 및 상기 방열판의 제2영역에 배치된 제2발광부를 포함하며,상기 제1발광부는 상기 제1금속층에 인접한 제1발광 칩; 상기 제2금속층에 인접한 제2발광 칩; 상기 제1발광 칩과 제2발광 칩 사이에 연결된 복수의 제3발광 칩; 상기 제1발광 칩과 상기 제1금속층의 제1본딩 영역에 연결된 제1와이어; 및 상기 제2발광 칩과 상기 제2금속층의 제2본딩 영역에 연결된 제2와이어를 포함하며,상기 제1와이어의 양단을 지나는 제1직선과 상기 제2와이어의 양단을 지나는 제2직선은 서로 팽행하지 않는 발광 소자.
- 제4항에 있어서,상기 제1와이어의 양단을 지나는 제1직선과 상기 제2와이어의 양단을 지나는 제2직선 사이의 각도는 둔각인 발광 소자.
- 제4항에 있어서,상기 제1와이어의 양단을 연결한 제1직선은 상기 방열 판의 외곽선의 한 점을 지나는 제1접선에 대해 법선에 가까운 방향으로 연장되며,상기 제2와이어의 양단을 연결한 제2직선은 상기 방열 판의 외곽선의 한 점을 지나는 제2접선에 대해 법선에 가까운 방향으로 연장되는 발광 소자.
- 제6항에 있어서,상기 제1직선은 상기 제1접선에 대해 85도 내지 95도의 범위의 각도로 배열되며,상기 제2직선은 상기 제2접선에 대해 85도 내지 95도의 범위의 각도로 배열되는 발광 소자.
- 제7항에 있어서,상기 제1직선은 상기 제1접선에 대해 90도의 각도로 배열되며,상기 제2직선은 상기 제2접선에 대해 90도의 각도로 배열되는 발광 소자.
- 제4항에 있어서,상기 제2발광부는 상기 제1금속층에 인접한 제4발광 칩; 상기 제2금속층에 인접한 제5발광 칩; 상기 제4발광 칩과 제5발광 칩 사이에 연결된 복수의 제6발광 칩; 상기 제4발광 칩과 상기 제1금속층의 제1본딩 영역에 연결된 제3와이어; 및 상기 제5발광 칩과 상기 제2금속층의 제2본딩 영역에 연결된 제4와이어를 포함하며,상기 제3와이어의 양단을 지나는 제3직선과 상기 제4와이어의 양단을 지나는 제4직선은 서로 팽행하지 않는 발광 소자.
- 제8항에 있어서,상기 제1와이어의 양단을 지나는 제1직선과 상기 제3와이어의 양단을 지나는 제3직선 사이의 각도는 예각인 발광 소자.
- 제4항에 있어서,상기 제1직선 및 제2직선 중 적어도 하나는 상기 제1발광 칩의 중심과 상기 제2발광 칩을 중심을 지나는 직선에 대해 5도 이상 어긋나게 배치되는 발광 소자.
- 제4항에 있어서,상기 제1금속층 및 제2금속층 상에 보호층이 배치되며,상기 제1 및 제2본딩 영역은 상기 보호층과 상기 몰딩 부재 사이에배치되며,상기 반사부재는 상기 제1 및 제2본딩 영역에 접촉되는 발광 소자.
- 제4항에 있어서,상기 복수의 제3발광 칩은 상기 제1 및 제2발광 칩 사이에 직렬로 연결된 적어도 3개의 발광 칩을 포함하며,상기 복수의 발광 칩 중 적어도 하나는 상기 제1 및 제2발광 칩의 중심을 지나는 직선과 평행하게 배열되는 발광 소자.
- 제13항에 있어서,상기 복수의 와이어 중 적어도 하나의 고점은 상기 복수의 제3발광 칩에 연결된 와이어의 고점의 높이보다 높게 위치되는 발광 소자.
- 제4항에 있어서,상기 제1 및 제2발광 칩 중 적어도 하나의 측면은 상기 제1직선 및 제2직선 중 적어도 하나와 평행하고 상기 제1 및 제2발광 칩의 중심을 지나는 직선에 대해 틸트된 발광 소자.
- 제1항 또는 제2항에 있어서,상기 복수의 발광부 중 어느 하나는 상기 복수의 발광 칩이 상기 복수의 와이어 각각의 양단을 연결하는 직선과 서로 평행하거나 동일 선상에 배열되는 발광 소자.
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US14/890,095 US9543489B2 (en) | 2013-05-08 | 2014-04-29 | Light emitting device |
JP2016512822A JP2016524322A (ja) | 2013-05-08 | 2014-04-29 | 発光素子 |
EP14795411.9A EP2996164B1 (en) | 2013-05-08 | 2014-04-29 | Light emitting device |
CN201480026275.0A CN105210201B (zh) | 2013-05-08 | 2014-04-29 | 发光器件 |
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KR1020130051766A KR102085888B1 (ko) | 2013-05-08 | 2013-05-08 | 발광 소자 |
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- 2014-04-29 US US14/890,095 patent/US9543489B2/en active Active
- 2014-04-29 WO PCT/KR2014/003781 patent/WO2014181996A1/ko active Application Filing
- 2014-04-29 EP EP14795411.9A patent/EP2996164B1/en active Active
- 2014-04-29 CN CN201480026275.0A patent/CN105210201B/zh active Active
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Also Published As
Publication number | Publication date |
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CN105210201B (zh) | 2019-06-04 |
US9543489B2 (en) | 2017-01-10 |
KR20140132517A (ko) | 2014-11-18 |
US20160087178A1 (en) | 2016-03-24 |
KR102085888B1 (ko) | 2020-03-06 |
EP2996164A4 (en) | 2016-11-30 |
CN105210201A (zh) | 2015-12-30 |
EP2996164A1 (en) | 2016-03-16 |
EP2996164B1 (en) | 2021-06-16 |
JP2016524322A (ja) | 2016-08-12 |
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