KR101997249B1 - Light emitting device - Google Patents

Abstract

The light emitting device according to the embodiment includes first and second side surfaces corresponding to each other; Third and fourth sides longer than the first and second sides and corresponding to each other; A body having a cavity; A first lead frame extending below the first side of the body from the bottom of the cavity; A second leadframe extending from a bottom of the cavity beneath a second side of the body; A first light emitting chip disposed on the first lead frame disposed in the cavity; A gap portion disposed between the first and second lead frames in the cavity; A second light emitting chip disposed on the second lead frame disposed in the cavity; And a molding member inside the cavity, wherein the first and second lead frames are disposed lower than the bottom of the cavity, and the first lead frame includes a first lead frame extending between the second lead frame and a third side of the body, 1 rib, wherein an end of the first rib is exposed on a third side of the body and is disposed closer to the second side than the first side of the body.

Description

[0001] LIGHT EMITTING DEVICE [0002]

The present invention relates to a light emitting device.

BACKGROUND ART A light emitting device, for example, a light emitting device (Light Emitting Device) is a type of semiconductor device that converts electrical energy into light, and has been widely recognized as a next generation light source in place of existing fluorescent lamps and incandescent lamps.

Since the light emitting diode generates light by using a semiconductor element, the light emitting diode consumes very low power as compared with an incandescent lamp that generates light by heating tungsten, or a fluorescent lamp that generates ultraviolet light by impinging ultraviolet rays generated through high-pressure discharge on a phosphor .

In addition, since the light emitting diode generates light using the potential gap of the semiconductor device, it has a longer lifetime, faster response characteristics, and an environment-friendly characteristic as compared with the conventional light source. Accordingly, much research has been conducted to replace an existing light source with a light emitting diode. The light emitting diode has been increasingly used as a light source for various lamps used in indoor and outdoor, lighting devices such as a liquid crystal display, have.

Embodiments provide a light emitting device having a rib in a body.

Embodiments provide a light emitting device having a rib of a lead frame protruding in different directions in a body.

Embodiments provide a light emitting device having a rib of a lead frame protruding in the same direction in a body.

Embodiments provide a light emitting device having ribs of a lead frame extending in opposite directions of a body and exposed to side surfaces of the body.

The light emitting device according to the embodiment includes first and second side surfaces corresponding to each other; Third and fourth sides longer than the first and second sides and corresponding to each other; A body having a cavity; A first lead frame extending below the first side of the body from the bottom of the cavity; A second leadframe extending from a bottom of the cavity beneath a second side of the body; A first light emitting chip disposed on the first lead frame disposed in the cavity; A gap portion disposed between the first and second lead frames in the cavity; A second light emitting chip disposed on the second lead frame disposed in the cavity; And a molding member inside the cavity, wherein the first and second lead frames are disposed lower than the bottom of the cavity, and the first lead frame includes a first lead frame extending between the second lead frame and a third side of the body, 1 rib, wherein an end of the first rib is exposed on a third side of the body and is disposed closer to the second side than the first side of the body.

The embodiment can improve the rigidity of the body of the light emitting device.

The embodiment can improve the reliability of the light emitting device.

The embodiment can improve the reliability of the light emitting device and the lighting device having the same.

1 is a perspective view of a light emitting device according to a first embodiment.
2 is a plan view of the light emitting device of FIG.
FIG. 3 is a rear view of the light emitting device of FIG. 2; FIG.
4 is a cross-sectional view of the light emitting device of FIG. 2 taken along the line AA.
5 is a cross-sectional view of the light-emitting device of Fig. 2 on the BB side.
6 is a cross-sectional view of the light-emitting device of Fig. 2 on the CC side.
7 is a cross-sectional view of the light emitting device of Fig. 2 on the DD side.
8 is a sectional view of the light emitting device of Fig. 2 on the EE side.
9 to 12 are first to fourth side views of the light emitting device of Fig.
13 is a plan view of a light emitting device according to the second embodiment.
14 is a rear view of the light emitting element of Fig.
Figs. 15 and 16 are third and fourth side views of the light emitting device of Fig. 13. Fig.
17 is a perspective view of a display device having a light emitting element according to an embodiment.
18 is a side sectional view showing another example of a display device having a light emitting element according to the embodiment.
19 is an exploded perspective view of a lighting apparatus having a light emitting element according to an embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. In the drawings, dimensions are exaggerated, omitted, or schematically illustrated for convenience and clarity of illustration. Also, the size of each component does not entirely reflect the actual size. The same reference numerals denote the same elements throughout the description of the drawings.

Hereinafter, a light emitting device according to an embodiment will be described with reference to the accompanying drawings.

1 is a plan view of the light emitting device of FIG. 1, FIG. 3 is a rear view of the light emitting device of FIG. 2, and FIG. 4 is a cross- 6 is a cross-sectional view of the light-emitting device of FIG. 2 taken along the line CC, FIG. 7 is a cross-sectional view of the light-emitting device of FIG. 2 taken along the DD line, 8 is a sectional view of the light emitting device of FIG. 2 on the EE side, and FIGS. 9 to 12 are first to fourth side views of the light emitting device of FIG.

1 to 12, a light emitting device 100 includes a body 111 having a cavity 112, a first rib 125, and a second rib 125. The cavity 111 has a first rib 125, A first lead frame 121 extending to the side 11 and a second lead 135 extending from the bottom of the cavity 112 to the second side 12 of the body 111, Light emitting chips 151 and 153, and wires 155 and 157 on the first and second lead frames 121 and 131, respectively.

The body 111 may include at least one of a light transmitting material, a reflective material, and an insulating material. The body 111 may be formed of a material having a reflectivity higher than that of the light emitted from the light emitting chips 151 and 153, for example, a material having a reflectance of 70% or more. When the reflectance of the body 111 is 70% or more, the body 111 may be defined as a non-transparent material. The body 111 of insulating material, for example, polyphthalamide resin series (PPA: Polyphthalamide), a resin material, a silicon (Si), metallic material, PSG (photo sensitive glass), such as epoxy or silicon material, sapphire (Al ₂ O ₃ , and a printed circuit board (PCB).

The body 111 may be formed of a thermosetting resin including silicon, an epoxy resin, or a plastic material, or a material having high heat resistance and high light resistance. The above-mentioned silicon includes a white-based resin. In the body 111, an acid anhydride, an antioxidant, a release agent, a light reflector, an inorganic filler, a curing catalyst, a light stabilizer, a lubricant, and titanium dioxide may be selectively added. . The body 111 may be formed of at least one member selected from the group consisting of an epoxy resin, a modified epoxy resin, a silicone resin, a modified silicone resin, an acrylic resin, and a urethane resin. For example, an epoxy resin comprising triglycidylisocyanurate, hydrogenated bisphenol A diglycidyl ether and the like and an acid comprising hexahydrophthalic anhydride, 3-methylhexahydrophthalic anhydride, 4-methylhexahydrophthalic anhydride and the like DBU (1,8-Diazabicyclo (5,4,0) undecene-7) as a curing accelerator in an epoxy resin, ethylene glycol, titanium oxide pigment and glass fiber as a cocatalyst were added, A solid epoxy resin composition that has been cured and B-staged can be used. However, the present invention is not limited thereto.

In addition, a light shielding material or a diffusing agent may be mixed in the body 111 to reduce light transmitted through the body 111. In order to provide the body 111 with a predetermined function, at least one member selected from the group consisting of a diffusing agent, a pigment, a fluorescent substance, a reflective substance, a light shielding substance, a light stabilizer and a lubricant is suitably mixed with the thermosetting resin .

The body 111 may include a metal oxide such as epoxy or silicon, and the metal oxide may include at least one of TiO ₂ , SiO ₂ and Al ₂ O _3. The body 111 may contain 5 wt% % ≪ / RTI >

The body 111 may be formed of a conductor having conductivity. If the body 111 is made of an electrically conductive material, an insulating layer (not shown) may be formed on the surface of the body 111, and a metal layer serving as a lead frame may be formed on the insulating layer.

The body 111 includes a plurality of side surfaces 11-14, an upper surface 15 and a lower surface. One or two or more side surfaces of the plurality of side surfaces 11-14 may be disposed perpendicular or inclined to the lower surface of the body 110 or the lower surface of the first and second lead frames 121 and 131. [ The first side 11 and the second side 12 of the side surface 11-14 of the body 111 correspond to each other and may be formed to have the same width Y1, And the width of the second lead frame 121, 131 or the width of the light emitting element. The third side surface 13 and the fourth side surface 14 may correspond to each other and may have the same length X1 and the length X1 may be the length of the light emitting device. The length X1 of the third side face 13 or the fourth side face 14 may be formed to be 1.5 times wider than the width Y1 of the first side face 11 or the second side face 12 .

The body 111 may have a polygonal shape, a circular shape, and a partially curved shape when viewed from above, but the present invention is not limited thereto.

The cavity 112 of the body 111 has a lower depth than the top surface 15 in the center region and is a region where light is emitted. The cavity 112 may include a recessed cup structure or a recessed structure from the upper surface 15 of the body 111, but the present invention is not limited thereto. The side surface 113 of the cavity 112 may be inclined or perpendicular to the upper surfaces of the first and second lead frames 121 and 131.

The first and second lead frames 121 and 131 may be disposed on the bottom of the cavity 112. For example, the first and second lead frames 121 and 131 may be disposed. The lead frames 121 and 131 may be made of a metal material such as titanium, copper, nickel, gold, chromium, tantalum, platinum, And may include at least one of tin (Sn), silver (Ag), phosphorous (P), iron (Fe), tin (Sn), zinc (Zn) . The first and second lead frames 121 and 131 may have a thickness T1 of 0.25 mm or more, for example, 0.25 to 0.35 mm, but the present invention is not limited thereto.

The first lead frame 121 extends from the gap 115 at the bottom of the cavity 112 to below the first side 11 of the body 111 and the first lead portion 122 is exposed do. The second lead frame 131 extends below the second side surface 12 of the body 111 from the gap portion 115 at the bottom of the cavity 112 and the second lead portion 132 is exposed do. The first lead frame 121 and the second lead frame 131 may be mounted on a PCB, but the present invention is not limited thereto.

The gap portion 115 is disposed between the first lead frame 121 and the second lead frame 131 and may be formed of an insulating material. The material of the gap portion 115 may be the same as or different from that of the body 111. The gap portion 116 can prevent moisture penetration at the interface between the first lead frame 121 and the second lead frame 131. [ For this, the gap portion 115 may protrude to the upper surfaces of the first and second lead frames 121 and 131, but the present invention is not limited thereto.

The lower surface of the first lead frame 121 and the lower surface of the second lead frame 131 and the lower surface of the body 111 may be disposed on the same plane. The present invention is not limited thereto. That is, in the light emitting device of the embodiment, the first and second lead frames 121 and 131 have a metal frame shape that is lower than the bottom of the cavity 112, so that the thickness of the light emitting device using the lead frame It can be provided in a thin thickness. Further, since the first and second lead frames 121 and 131 are provided with a flat bottom surface, the heat radiation efficiency can be improved. The first and second lead frames 121 and 131 may have a larger top surface area than a bottom surface area.

The gap portion 115 disposed at the bottom of the cavity 112 is disposed at the bottom center of the cavity 112 or disposed close to either one of the first and second sides 11 and 12 of the body 111 . The gap portion 115 disposed at the bottom of the cavity 112 has a portion closer to the third side surface 13 closer to the second side surface 12 than the first side surface 11, May be disposed closer to the first side 11 than the second side 12.

A plurality of light emitting chips 151 and 153 may be disposed in the cavity 112 and the plurality of light emitting chips 151 and 153 may be disposed on different lead frames or the same lead frame.

The first light emitting chip 151 is bonded to the first lead frame 121 with an adhesive member (not shown), and is connected to the second lead frame 131 through a wire 155. The second light emitting chip 153 is bonded to the second lead frame 131 with an adhesive material and is connected to the first lead frame 121 by a wire 157. The adhesive member includes an insulating or conductive adhesive. The first and second light emitting chips 151 and 153 may be electrically connected directly to the respective lead frames by providing electrodes at the lower portion thereof, but the present invention is not limited thereto.

The light emitting chips 151 and 153 can selectively emit light in a visible light band to an ultraviolet light band. For example, a red LED chip, a blue LED chip, a green LED chip, a yellow green LED chip, an ultraviolet LED Chip, and a white LED chip. The light emitting chips 151 and 153 include a light emitting device made of a compound semiconductor of Group II-VI or / or Group III-V elements.

4, a molding member 161 is disposed in the cavity 112 of the body 111, and the molding member 161 includes a light transmitting resin material such as silicone or epoxy. The molding member 161 may be formed as a single layer or multiple layers. The molding member 161 may include a phosphor for changing the wavelength of the emitted light on the light emitting chips 151 and 153, and may include another diffusing agent or scattering agent.

The phosphor excites a part of the light emitted from the light emitting chips 151 and 153 to emit light of a different wavelength. The phosphor may include at least one of a yellow phosphor, a green phosphor, a blue phosphor, and a red phosphor. For example, the phosphor may be a nitride-based phosphor, an oxynitride-based phosphor, or the like, which is mainly activated by lanthanoid- Alkaline earth metal borate halogen phosphors, alkaline earth metal aluminate phosphors, alkaline earth silicate, alkaline earth metal silicate phosphors, alkaline earth metal silicate phosphors, alkaline earth metal silicate phosphors, alkaline earth metal silicate phosphors, A rare earth aluminate, a rare earth silicate or a lanthanoid-based element such as Eu, which is mainly activated by a lanthanoid element such as Ce, etc., which is mainly activated by a rare earth aluminate, a rare earth aluminate, Organic and organic complexes, and the like. The. As a specific example, the above-mentioned phosphors can be used, but the present invention is not limited thereto.

The upper surface of the molding member 161 may be formed in a flat shape, a concave shape, a convex shape, or the like, but is not limited thereto. An optical lens (not shown) may be formed on the molding member 161. The optical lens may include a concave or convex lens structure. The light emitted from the light emitting device 100 (light distribution).

A protection element (not shown) may be disposed in the light emitting element 100, and the protection element electrically protects the light emitting chips 151 and 153. The protection device may be implemented with a thyristor, a zener diode, or a TVS (Transient Voltage Suppression), and the zener diode protects the light emitting chip from electrostatic discharge (ESD).

Referring to FIG. 2, the first lead frame 121 includes a first rib 125. The first rib 125 extends between the first lead frame 121 and the third side surface 13. For example, the first rib 125 extends in the X-axis direction in the cavity 112 Extending between the second lead frame 131 and the third side surface 13 of the body 111 with respect to the center line Y0 perpendicular to the first lead frame 131 and the third side surface 13 . The end 123 of the first rib 125 is exposed to the third side 13 of the body 111 and is disposed closer to the second side 12 than to the first side 11. Accordingly, the rigidity between the cavity 112 and the third side face 13 can be reinforced.

The second lead frame 131 includes a second rib 135. The second ribs 135 extend between the second lead frame 131 and the fourth side surface 14 and extend from the center line Y0 perpendicular to the center of the X axis direction in the cavity 112 Extends between the first lead frame 121 and the fourth side 14 of the body 111 and is spaced from the first lead frame 121 and the fourth side 14 by reference. The end 133 of the second rib 135 is exposed to the fourth side 14 of the body 111 and is disposed closer to the first side 11 than to the second side 12. Accordingly, the rigidity between the cavity 112 and the fourth side face 14 can be reinforced.

The length D1 of the first rib 125 protrudes from the length X1 of the third side 13 of the body 111 in the range of 1 / 3.3 to 1 / 2.8, The length D2 of the body 111 protrudes in the range of 1 / 3.3 to 1 / 2.8 of the body 111. [ When the lengths D1 and D2 of the first ribs 125 and the second ribs 135 are shorter than the above ranges, the gap portions 115 adjacent to the bottom of the cavity 112 are adjacent to each other, 111) is difficult to secure. If the lengths D1 and D2 of the first rib 125 and the second rib 135 are longer than the above ranges, the bonding problems of the first and second lead frames 121 and 131 and the lowering of the heat radiation efficiency Problems can arise.

3, 7 and 8, the first rib 125 is spaced apart from the third side 13 of the body 111 by a predetermined distance B1. The interval B1 may be in the range of 10% ± 0.5% of the width Y1 of the first and second lead frames 121 and 131, for example, 200 μm ± 10 μm. The second ribs 135 are spaced from the fourth side 14 of the body 111 by a predetermined distance C1 and the interval C1 may be formed within the range of the interval B1. Accordingly, by arranging the portions 116 and 117 of the body 111 between the third and fourth sides 13 and 14 of the body 111 and the first and second ribs 125 and 135, It is possible to minimize the exposure of the surfaces of the frames 121 and 131 and to reinforce the rigidity with respect to the outer frame portion of the body 111. [

3 and 4, the body 111 includes coupling portions 118 and 119 coupled to holes 129 and 139 formed in the first and second lead frames 121 and 131, and the coupling portions 118 and 119, And may be exposed on the lower surfaces of the first and second lead frames 121 and 131.

5 to 8, the first lead frame 121 includes a first recess portion 124 and a second recess portion 126, and the first recess portion 124 includes a first recess portion 124 and a second recess portion 126, Is recessed from the third side face (13) of the body (111) to a predetermined depth (B2) inward of the first lead frame (121). The depth B2 may be in the range of 100 mu m or more, for example, in the range of 100 mu m-200 mu m. If the depth B2 is too deep, the heat dissipation efficiency is lowered. If the depth B2 is too small, the coupling strength with the body 111 may be lowered. The first protrusion 125A is formed by the first recess portion 124 and the first protrusion 125A is connected to the first rib 125. [

The second recess portion 126 is recessed from the fourth side surface 14 of the body 111 to a predetermined depth B3 inward of the first lead frame 121, May be formed in a range of 100 占 퐉 or more, for example, 100 占 퐉 to 200 占 퐉, but the invention is not limited thereto.

The second lead frame 131 includes a third recess portion 134 and a fourth recess portion 136. The third recess portion 134 includes a fourth side surface 15 to the inside of the second lead frame 131 at a predetermined depth C2. The depth C2 may be in the range of 100 mu m or more, for example, 100 mu m-200 mu m. If the depth C2 is too deep, the heat dissipation efficiency may be lowered. If the depth C2 is too small, the coupling strength with the body 111 may be deteriorated. A second projection 135A is formed by the third recess 134 and the second projection 135A is connected to the second rib 135. [

The fourth recess portion 136 is recessed from the third side surface 13 of the body 111 to a predetermined depth C3 in the inner direction of the second lead frame 131, May be formed in a range of 100 占 퐉 or more, for example, 100 占 퐉 to 200 占 퐉, but the invention is not limited thereto.

Here, the corner portions of the first through fourth recesses 124, 126, 134, and 136 may have a predetermined curvature, and the curvature may be a radius ranging from 100 μm to 200 μm. However, the present invention is not limited thereto.

The thickness T2 of the first protrusion 125A, the first rib 125, the second protrusion 135A and the second rib 135 is equal to the thickness T1 of the first and second lead frames 121 and 131, For example, 30% to 50% of the total thickness of the substrate. If the thickness T2 is too thin, it can not support the support. If the thickness T2 is too large, the coupling strength with the body 111 may be deteriorated.

 5 and 6, the length D3 of the first recess 124 in the first lead frame 121 is smaller than the length D3 of the first protrusion 125A and the first rib 125 And may be formed in a range of 40% or more, for example, 1.6 mm ± 0.5 mm, of the length X1 of the body 111.

The length D5 of the third recess 134 in the second lead frame 131 is a length extending downward from the second protrusion 135A and the second rib 135, 111) of 40% or more, for example, 1.6 mm +/- 0.5 mm, of the length X1.

A first separating portion 115B of the gap portion 115 extends between the first rib 125 and the second projection 135A and extends between the second rib 135 and the first projection 125A. The second separation portion 115A of the gap portion 1150 is extended.

Here, the first and second ribs 125 and 135 extend in opposite directions to each other with reference to the center axis Zo of the light emitting element as a reference or a gap.

9-12, a first lead portion 122 of the first lead frame 121 is disposed on the first side 11 of the body 111 and a second lead portion 122 of the second lead 12 is disposed on the second side 12, And the second lead portion 132 of the frame 131 is disposed.

The end 123 of the first rib 125 is narrower than the gap G2 between the second lead frame 131 and the first lead frame 121 in the third side face 13 of the body 111, The end 133 of the second rib 135 on the fourth side 14 of the body 111 is spaced from the gap G4 between the first lead frame 131 and the second lead frame 131, And has a narrower gap G3 than the gap 121. The end portions 123 and 133 of the first and second lead portions 125 and 135 are spaced apart from the lower surface of the body 111, thereby preventing deterioration of electrical reliability and suppressing moisture penetration.

[Second Embodiment]

FIG. 13 is a plan view of the light emitting device according to the second embodiment, FIG. 14 is a rear view of the light emitting device of FIG. 13, and FIGS. 15 and 16 are third and fourth side views of the light emitting device of FIG.

13 and 14, the light emitting device includes a body 211 having a cavity 212, a first cavity 211 extending from the bottom of the first cavity 212 to a first side 11 of the body 211, A second lead frame 231 extending from the bottom of the cavity 212 to the second side 12 of the body 211 and a second lead frame 231 extending from the bottom of the cavity 212 to the first and second lead frames 221, Chips 251, 253, and wires 255, 257.

Light emitting chips 251 and 253 are disposed on the first and second lead frames 221 and 231 in the cavity 212 and electrically connected to the wires 2555 and 257. The number of the light emitting chips 221 and 251 is not limited. A portion of the gap 215 between the first and second lead frames 221 and 231 may be disposed close to or at the center of either side 11,13 of the bottom of the cavity 212, It is not limited. In addition, the peripheral side surface 213 of the cavity 212 may be formed as a curved surface, but the present invention is not limited thereto.

The first lead frame 221 includes first and second ribs 224 and 225 and the first rib 224 is connected to the third side surface 13 of the body 211 through the second lead frame 231. [ And the second rib 225 extends between the second lead frame 231 and the fourth side 14 of the body 211. The first and second ribs 224 and 225 may extend in the same direction with respect to the gap 215 disposed at the bottom of the cavity 212 and may be arranged in parallel with each other.

The end 236 of the first rib 224 is exposed to the third side 13 of the body 211 and the second side 23 of the first rib 224 is exposed to the second side And an end portion 227 of the second rib 225 is exposed to the fourth side surface 14 of the body 211 and is disposed closer to the second side surface 12 than the first side surface 11, ). ≪ / RTI >

14, the lower surface of the first lead frame 221 is spaced apart from the third and fourth side surfaces 13 and 14 of the body 211 by a predetermined distance E1 on the back surface of the body 211, The lower surface of the second lead frame 2310 is spaced from the third and fourth side surfaces 13 and 14 of the body 211 by an interval E3 which is further spaced from the interval E1.

The coupling portions 229 and 239 of the body 211 may be coupled to the holes 229 and 239 of the first and second lead frames 221 and 233, but the present invention is not limited thereto.

The embodiment can secure the rigidity of the body by extending to both sides of the other lead frame 131 using one lead frame 121. [

<Lighting system>

The light emitting device according to the embodiment can be applied to an illumination system. The lighting system includes a structure in which a plurality of light emitting elements are arrayed and includes a display device shown in Figs. 17 and 18, a lighting device shown in Fig. 19, and may include a lighting lamp, a traffic light, a vehicle headlight, have.

17 is an exploded perspective view of a display device having a light emitting element according to an embodiment.

17, a display device 1000 according to an embodiment includes a light guide plate 1041, a light source module 1031 for providing light to the light guide plate 1041, and a reflection member 1022 An optical sheet 1051 on the light guide plate 1041 and a display panel 1061 on the optical sheet 1051 and the light guide plate 1041 and the light source module 1031 and the reflection member 1022 But is not limited to, a bottom cover 1011.

The bottom cover 1011, the reflective sheet 1022, the light guide plate 1041, and the optical sheet 1051 can be defined as a light unit 1050.

The light guide plate 1041 serves to diffuse light into a surface light source. The light guide plate 1041 may be formed of a transparent material such as acrylic resin such as PMMA (polymethyl methacrylate), polyethylene terephthalate (PET), polycarbonate (PC), cycloolefin copolymer (COC), and polyethylene naphtha late ) &Lt; / RTI &gt; resin.

The light source module 1031 provides light to at least one side of the light guide plate 1041, and ultimately acts as a light source of the display device.

The light source module 1031 includes at least one light source module 1031 and may directly or indirectly provide light from one side of the light guide plate 1041. The light source module 1031 includes a substrate 1033 and a light emitting device 1035 according to the embodiment described above and the light emitting devices 1035 may be arrayed at a predetermined interval on the substrate 1033 .

The substrate 1033 may be a printed circuit board (PCB) including a circuit pattern (not shown). However, the substrate 1033 may include not only a general PCB, but also a metal core PCB (MCPCB), a flexible PCB (FPCB), and the like. When the light emitting element 1035 is mounted on the side surface of the bottom cover 1011 or on the heat radiation plate, the substrate 1033 can be removed. Here, a part of the heat radiating plate may be in contact with the upper surface of the bottom cover 1011.

The plurality of light emitting devices 1035 may be mounted on the substrate 1033 such that the light emitting surface is spaced apart from the light guiding plate 1041 by a predetermined distance. However, the present invention is not limited thereto. The light emitting device 1035 may directly or indirectly provide light to the light-incident portion, which is one surface of the light guide plate 1041, but the present invention is not limited thereto.

The reflective member 1022 may be disposed under the light guide plate 1041. The reflection member 1022 reflects the light incident on the lower surface of the light guide plate 1041 so as to face upward, thereby improving the brightness of the light unit 1050. 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 house 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 a housing portion 1012 having a box-like shape with an opened upper surface, but the present invention is not limited thereto. The bottom cover 1011 may be coupled to 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. In addition, the bottom cover 1011 may include a metal or a non-metal material having good thermal conductivity, but the present invention is not limited thereto.

The display panel 1061 is, for example, an LCD panel, including first and second transparent substrates facing each other, and a liquid crystal layer interposed between the first and second substrates. A polarizing plate may be attached to at least one surface of the display panel 1061, but the present invention is not limited thereto. The display panel 1061 displays information by light passing through the optical sheet 1051. Such a display device 1000 can be applied to various types of 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-transmitting sheet. The optical sheet 1051 may include at least one of a sheet such as a diffusion sheet, a horizontal and vertical prism sheet, and a brightness enhancement sheet. The diffusion sheet diffuses incident light, and the horizontal and / or vertical prism sheet condenses incident light into a display area. The brightness enhancing sheet improves the brightness by reusing the lost light. A protective sheet may be disposed on the display panel 1061, but the present invention is not limited thereto.

Here, the optical path of the light source module 1031 may include the light guide plate 1041 and the optical sheet 1051 as an optical member, but the invention is not limited thereto.

18 is a view showing a display device having a light emitting element according to the embodiment.

18, the display device 1100 includes a bottom cover 1152, a substrate 1120 on which the above-described light emitting device 1124 is arrayed, an optical member 1154, and a display panel 1155.

The substrate 1120 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 a receiving portion 1153, but the present invention is not limited thereto. The light source module 1160 includes a substrate 1120 and a plurality of light emitting devices 1124 arranged on the substrate 1120.

Here, the optical member 1154 may include at least one of a lens, a light guide plate, a diffusion sheet, a horizontal and vertical prism sheet, and a brightness enhancement sheet. The light guide plate may be made of PC material or PMMA (poly methyl methacrylate), and the light guide plate may be removed. The diffusion sheet diffuses incident light, and the horizontal and vertical prism sheets condense incident light into a display area. The brightness enhancing sheet enhances brightness by reusing the lost light.

The optical member 1154 is disposed on the light source module 1160 and performs surface light source, diffusion, and light condensation of light emitted from the light source module 1160.

19 is an exploded perspective view of a lighting device having a light emitting device according to an embodiment.

19, the lighting apparatus according to the embodiment includes a cover 2100, a light source module 2200, a heat discharger 2400, a power supply unit 2600, an inner case 2700, and a socket 2800 . Further, the illumination device according to the embodiment may further include at least one of the member 2300 and the holder 2500. The light source module 2200 may include a light emitting device according to an embodiment of the present invention.

For example, the cover 2100 may have a shape of a bulb or a hemisphere, and may be provided in a shape in which the hollow is hollow and a part is opened. The cover 2100 may be optically coupled to the light source module 2200. For example, the cover 2100 may diffuse, scatter, or excite light provided from the light source module 2200. The cover 2100 may be a kind of optical member. The cover 2100 may be coupled to the heat discharging body 2400. The cover 2100 may have an engaging portion that engages with the heat discharging body 2400.

The inner surface of the cover 2100 may be coated with a milky white paint. Milky white paints may contain a diffusing agent to diffuse light. The surface roughness of the inner surface of the cover 2100 may be larger than the surface roughness of the outer surface of the cover 2100. This is for sufficiently diffusing and diffusing the light from the light source module 2200 and emitting it to the outside.

The cover 2100 may be made of glass, plastic, polypropylene (PP), polyethylene (PE), polycarbonate (PC), or the like. Here, polycarbonate is excellent in light resistance, heat resistance and strength. The cover 2100 may be transparent so that the light source module 2200 is visible from the outside, and may be opaque. The cover 2100 may be formed by blow molding.

The light source module 2200 may be disposed on one side of the heat discharging body 2400. Accordingly, heat from the light source module 2200 is conducted to the heat discharger 2400. The light source module 2200 may include a light source unit 2210, a connection plate 2230, and a connector 2250.

The member 2300 is disposed on the upper surface of the heat discharging body 2400 and has guide grooves 2310 through which the plurality of light source portions 2210 and the connector 2250 are inserted. The guide groove 2310 corresponds to the substrate of the light source unit 2210 and the connector 2250.

The surface of the member 2300 may be coated or coated with a light reflecting material. For example, the surface of the member 2300 may be coated or coated with a white paint. The member 2300 reflects the light reflected by the inner surface of the cover 2100 toward the cover 2100 in the direction toward the light source module 2200. Therefore, the light efficiency of the illumination device according to the embodiment can be improved.

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 can be made between the heat discharging body 2400 and the connecting plate 2230. The member 2300 may be formed of an insulating material to prevent an electrical short circuit between the connection plate 2230 and the heat discharging body 2400. The heat discharger 2400 receives heat from the light source module 2200 and heat from the power supply unit 2600 to dissipate heat.

The holder 2500 blocks the receiving groove 2719 of the insulating portion 2710 of the inner case 2700. Therefore, the power supply unit 2600 housed in the insulating portion 2710 of the inner case 2700 is sealed. The holder 2500 has a guide protrusion 2510. The guide protrusion 2510 may have 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 and provides the electrical signal to the light source module 2200. The power supply unit 2600 is housed in the receiving groove 2719 of the inner case 2700 and is sealed inside 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 a protrusion 2670.

The guide portion 2630 has a shape protruding outward from one side of the base 2650. The guide portion 2630 may be inserted into the holder 2500. A plurality of components may be disposed on one side of the base 2650. The plurality of components include, for example, a DC converter for converting AC power supplied from an external power source into DC power, a driving chip for controlling driving of the light source module 2200, an ESD (ElectroStatic discharge) protective device, and the like, but the present invention is not limited thereto.

The protrusion 2670 has a shape protruding outward from the other side of the base 2650. The protrusion 2670 is inserted into the connection portion 2750 of the inner case 2700 and receives an external electrical signal. For example, the protrusion 2670 may be equal to or smaller than the width of the connection portion 2750 of the inner case 2700. One end of each of the positive wire and the negative wire is electrically connected to the protrusion 2670 and the other end of the positive wire and the negative wire are electrically connected to the socket 2800.

The inner case 2700 may include a molding part together with the power supply part 2600. The molding part is a hardened portion of the molding liquid so that the power supply unit 2600 can be fixed inside the inner case 2700.

The features, structures, effects and the like described in the embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. Furthermore, the features, structures, effects and the like illustrated in the embodiments can be combined and modified by other persons skilled in the art to which the embodiments belong. Therefore, it should be understood that the present invention is not limited to these combinations and modifications.

100: light emitting element 111, 211: body
112, 212: cavity 121, 131, 221, 231: lead frame
125, 135, 224, and 225: ribs 151, 153, 251, and 253:
161: Molding member

Claims (11)

A body having a first side and a second side corresponding to each other and a third side and a fourth side which are longer than the first side and the second side and correspond to each other and have a cavity;
A first lead frame extending below the first side of the body from the bottom of the cavity;
A second leadframe extending from a bottom of the cavity beneath a second side of the body;
A first light emitting chip on the first lead frame disposed in the cavity and a second light emitting chip on the second lead frame disposed in the cavity; And
And a gap portion disposed between the first lead frame and the second lead frame in the cavity,
Wherein the first lead frame includes a first rib extending between the second lead frame and a third side of the body,
The second leadframe includes a second rib extending between the first leadframe and a fourth side of the body,
Wherein the first lead frame is disposed closer to the first side than the second lead frame,
The second lead frame being disposed adjacent to the second side than the first lead frame,
Wherein a portion of the first rib is surrounded by the body between the second leadframe and a third side of the body,
And a portion of the second rib is surrounded by the body between the first lead frame and the fourth side of the body. The method according to claim 1,
The first ribs are spaced a predetermined distance from the third side of the body and the second ribs are spaced apart from the fourth side of the body by a predetermined distance,
Wherein an end of the first rib and an interval between the second lead frames are narrower than an end of the first rib and an interval between the end of the first rib and the first lead frame,
Wherein an end of the second rib and an interval between the first lead frames are narrower than an end of the second rib and an interval between the end of the second rib and the second lead frame. The method according to claim 1,
The distance between the lower surface of the second lead frame and the third side surface and the fourth side surface of the body is larger than the distance between the lower surface of the first lead frame and the third side surface and the fourth side surface of the body Light emitting element. The method of claim 3,
Wherein the first lead frame and the second lead frame include holes,
Wherein the body includes an engaging portion engaging with the hole,
And a lower surface of the coupling portion is exposed on a lower surface of the first lead frame and the second lead frame. The method of claim 3,
Wherein an end of the first rib is exposed to a third side of the body and is disposed closer to a second side of the body than a first side of the body,
And an end of the second rib is exposed to a fourth side of the body and disposed closer to the first side of the body than a second side of the body. 5. The method of claim 4,
The first lead frame includes a first recess portion that is recessed from the third side of the body in an inward direction of the first lead frame and a second recess portion that is recessed from the fourth side of the body inward of the first lead frame And a second recessed portion. The method according to claim 6,
The second leadframe includes a third recessed portion recessed from the fourth side of the body in the inward direction of the second leadframe and a second recessed portion recessed from the third side of the body inward of the second leadframe And a fourth recessed portion. delete delete delete delete

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