WO2022108302A1 - 발광 장치 - Google Patents
발광 장치 Download PDFInfo
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- WO2022108302A1 WO2022108302A1 PCT/KR2021/016798 KR2021016798W WO2022108302A1 WO 2022108302 A1 WO2022108302 A1 WO 2022108302A1 KR 2021016798 W KR2021016798 W KR 2021016798W WO 2022108302 A1 WO2022108302 A1 WO 2022108302A1
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- WIPO (PCT)
- Prior art keywords
- light
- groove
- wall portion
- light emitting
- emitting diode
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Images
Classifications
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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
- H01L33/48—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
- H01L33/58—Optical field-shaping elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- 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
-
- 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
- H01L33/48—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
- H01L33/483—Containers
- H01L33/486—Containers adapted for surface mounting
-
- 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
- H01L33/48—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
- H01L33/50—Wavelength conversion elements
- H01L33/501—Wavelength conversion elements characterised by the materials, e.g. binder
- H01L33/502—Wavelength conversion materials
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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
- H01L33/48—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
- H01L33/52—Encapsulations
- H01L33/54—Encapsulations having a particular shape
-
- 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
- H01L33/48—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
- H01L33/52—Encapsulations
- H01L33/56—Materials, e.g. epoxy or silicone resin
-
- 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
- H01L33/48—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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- 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
- H01L33/48—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
- H01L33/50—Wavelength conversion elements
Definitions
- the present invention relates to a light emitting device.
- a light emitting chip is a semiconductor device that emits light generated by recombination of electrons and holes, and is recently used in various fields such as displays, automobile lamps, and general lighting. Since the light emitting chip has a long lifespan, low power consumption, and fast response speed, it is being applied to various fields such as automobile lamps and display devices.
- a light emitting device applied to a vehicle lamp or a backlight of a display it may be required to control the light scattering phenomenon to the side of the light emitting device.
- a light scattering phenomenon occurs on the side of the light emitting device
- when light emitted from a car lamp is irradiated to the front of the car it is not possible to clearly distinguish a cutoff line, which is a boundary between the bright part and the dark part. Due to this, light may be irradiated to an unnecessary area, thereby obstructing the view of another driver.
- a cutoff line which is a boundary between the bright part and the dark part. Due to this, light may be irradiated to an unnecessary area, thereby obstructing the view of another driver.
- a display when light bleeding occurs on the side of the light emitting device, it is difficult to achieve a uniform backlight.
- a light emitting device capable of preventing light from spreading to the side is required.
- An object of the present invention is to provide a light emitting device capable of preventing the light scattering phenomenon of the light emitting device.
- Another object to be solved by the present invention is to provide a light emitting device capable of preventing light from spreading in a local area between the light emitting diode chips in a light emitting device including at least two or more light emitting diode chips.
- a light emitting device includes: a plurality of light emitting diode chips positioned on the substrate; a plurality of light transmitting layers positioned on top surfaces of the plurality of light emitting diode chips; a sidewall portion surrounding the plurality of light emitting diode chips and the plurality of light transmitting layers; and a first groove and a second groove positioned on an upper surface of at least a portion of the sidewall portion, wherein the first groove has a width narrower than the shortest width from the at least one light transmitting layer closest to the first groove. and may have a depth smaller than a thickness of a lower surface in an upper surface of at least one of the most adjacent light transmitting layers.
- the substrate may have pattern electrodes on upper and lower surfaces, and a circuit pattern including vias electrically connecting the pattern electrodes on the upper and lower surfaces.
- the plurality of light transmitting layers may include a wavelength conversion material.
- the width of the upper surface and the width of the lower surface of the plurality of light transmitting layers may be the same.
- a width of a lower surface of the plurality of light transmitting layers may be wider than a width of the plurality of light emitting diode chips.
- the width of the upper surface of the plurality of light transmitting layers is wider than the width of the lower surface.
- the side wall portion may include an outer wall portion surrounding outer surfaces of the plurality of light emitting diode chips and the plurality of light transmitting layers, and an inner wall portion formed between the plurality of light emitting diode chips and side surfaces of the plurality of light transmitting layers facing each other.
- the outer wall portion may have an inclined surface whose thickness from the substrate becomes thinner as it moves away from a surface adjacent to the side surface of the light transmitting layer.
- the first groove and the second groove may be formed in a straight line extending along side surfaces of the plurality of light transmitting layers.
- the shortest distance from the substrate to the first groove may be farther than the shortest distance from the substrate to the second groove.
- the substrate may include a first side surface and a second side surface positioned opposite to the first side surface, and may have a first groove extension portion extending to the first side surface and a second groove extension portion extending toward the second side surface. have.
- the length of the first groove extension portion may be longer than the length of the second groove extension portion.
- the side wall portion may include an outer wall portion and an inner wall portion, and the first groove extension portion and the second groove extension portion may be positioned on the outer wall portion.
- a distance between the first side surface and the end of the first groove extension may be shorter than a distance between the second side surface and the end of the second groove extension.
- It may further include third and fourth grooves orthogonal to the first and second grooves and positioned on side surfaces of the plurality of light transmitting layers.
- Distances from side surfaces of the plurality of light transmitting layers to the first, second, third, and fourth grooves may be similar.
- the first groove and the second groove may have extension portions positioned on the outer wall portion through the fourth groove, and the third groove and the fourth groove may have extension portions positioned on the outer wall portion past the second groove portion. have.
- the first groove and the third groove may cross at right angles in a region where at least four corners of the plurality of light transmitting layers are adjacent to each other.
- the light emitting device may prevent light from passing through the sidewall portion using the groove, thereby preventing light from spreading to an adjacent light emitting diode chip.
- the light emitting device can prevent light from spreading from the side of the light emitting device by adjusting the width of the outer wall portion.
- FIG. 1A is a schematic perspective view for explaining a light emitting device according to an embodiment of the present invention.
- Fig. 1B is a schematic plan view taken along the cut-away line A-A' of Fig. 1A;
- Fig. 1C is a schematic cross-sectional view taken along the line A-A' of Fig. 1A;
- 1D is a schematic cross-sectional view taken along line B-B' of FIG. 1A;
- FIG. 1E is a schematic cross-sectional view taken along line C-C′ of FIG. 1A ;
- FIG. 2 is a schematic cross-sectional view for explaining a light emitting device according to another embodiment of the present invention.
- FIG 3 is a schematic cross-sectional view for explaining a light emitting device according to another embodiment of the present invention.
- 4A is a schematic plan view for explaining a light emitting device according to another embodiment of the present invention.
- Fig. 4b is a schematic cross-sectional view taken along line D-D' of Fig. 4a;
- FIG. 5 is a graph showing the luminance of a light emitting device according to an embodiment of the present invention.
- 6A is a schematic plan view for explaining a light emitting device according to another embodiment of the present invention.
- FIG. 6B is a schematic cross-sectional view taken along line E-E′ of FIG. 6A .
- FIG. 7A is a schematic plan view for explaining a light emitting device according to another embodiment of the present invention.
- FIG. 7B is a schematic cross-sectional view taken along line F-F′ of FIG. 7A .
- FIG. 8 is a schematic cross-sectional view for explaining a light emitting device according to another embodiment of the present invention.
- FIG. 9 is a schematic cross-sectional view for explaining a light emitting device according to another embodiment of the present invention.
- 1A to 1E are a perspective view, a plan view, and a cross-sectional view for explaining a light emitting device according to an embodiment of the present invention.
- the light emitting device 10 may include a substrate 200 and two or more light emitting diode chips 110 disposed on the substrate 200 .
- the light emitting device 10 includes a light emitting diode chip 110 and light emitting devices 100 including a light transmitting layer 120 positioned on an upper surface of the light emitting diode chip 110 , respectively, and between the light emitting devices 100 .
- the side wall portion 140 including the inner wall portion 141 positioned therein and the outer wall portion 143 surrounding the light emitting devices 100 , and the first groove 131 and the outer wall positioned in the inner wall portion 141 . It may include a second groove 133 located in the portion 143 .
- the substrate 200 may be an insulating or conductive substrate.
- the substrate 200 may include a ceramic material having excellent thermal conductivity, such as AlN.
- the substrate 200 may include a circuit pattern 210 on an upper surface and/or a lower surface.
- An insulating material may be included to insulate the circuit patterns 210 from each other.
- the insulating layer may be formed of an insulating material such as an epoxy resin or prepreg.
- the upper circuit pattern 210a and the lower circuit pattern 210b of the substrate 200 may be connected through a via 210c penetrating the substrate 200 .
- the via 210c may be formed by forming a through hole in the substrate 200 and then filling in a conductive material.
- the via 210c may have a structure having a constant width from the upper surface to the lower surface of the substrate 200 , but the present invention is not limited thereto.
- the via 210c may have a structure in which the width becomes narrower from the top and bottom surfaces of the substrate 200 toward the inside of the substrate.
- the vias 210c passing through the insulating layer may be staggered from each other.
- the circuit patterns 210 may be electrically connected to the plurality of light emitting diode chips 110 positioned on the substrate 200 , and may be electrically connected to an external power source through a portion exposed under the substrate 200 . It may be connected to supply power to the plurality of light emitting diode chips 110 .
- Each of the plurality of light emitting diode chips 110 may be electrically connected to separate electrodes by the circuit pattern 210 .
- the plurality of light emitting diode chips 110 may be individually driven by separately connecting power supplied to the electrodes.
- the present invention is not limited thereto, and the electrodes may be electrically interconnected to each other.
- the light emitting device 10 may further include a separate control unit, and the control unit may control driving of the plurality of light emitting diode chips 110 .
- the upper and lower circuit patterns may be connected through a connection pattern (not shown) formed along the side surface of the substrate 200 instead of the via 210c.
- the plurality of light emitting diode chips 110 may be bonded to the substrate 200 .
- the electrodes 111 of the plurality of light emitting diode chips 110 may be respectively connected to the circuit patterns 210 formed on the substrate 200 by eutectic bonding, but are not limited thereto, and solder bonding, epoxy bonding, etc. It can be connected by In order to bond the plurality of light emitting diode chips 110 to the substrate 200 , a conductive material 160 for mechanically and electrically bonding to the circuit pattern 210a of the upper surface of the substrate 200 may be disposed.
- Each of the plurality of light emitting diode chips 110 includes a growth substrate 110a, an n-type semiconductor layer, a p-type semiconductor layer, and a semiconductor layer 110b including an active layer interposed between the n-type semiconductor layer and the p-type semiconductor layer. may include In addition, each of the plurality of light emitting diode chips 110 may include an electrode 111 disposed on a lower surface of the semiconductor layer 110b. Accordingly, the light emitting diode chip 110 may emit light when power is supplied.
- the light transmitting layer 120 may transmit the light emitted from the light emitting diode chip 110 , and if necessary, by converting the wavelength of the light emitted from the light emitting diode chip 110 , light of a specific color is emitted can make it happen.
- the light transmitting layers 120 may emit light of different colors from each other.
- the light transmitting layer 120 may be made of a transparent resin such as silicon or epoxy, glass, ceramic, or the like, and if necessary, a wavelength conversion material for converting the wavelength of light may be mixed with these materials.
- the transparent resin may be transparent silicone.
- the wavelength conversion material may include at least one of a quantum dot phosphor, an inorganic or organic phosphor, and a yellow phosphor, a red phosphor, and a green phosphor may be used.
- yellow phosphor examples include YAG:Ce(T 3 Al 3 O 12 :Ce)-based phosphor or silicate (Yttrium (Y) aluminum (Al) garnet doped with cerium (Ce) having a wavelength of 530 to 570 nm as the main wavelength. Silicate)-based phosphors.
- red phosphor examples include a UOX (Y 2 O 3 :EU)-based phosphor, nitride (Nitride) consisting of a compound of yttrium oxide (Y 2 O 3 ) and europium (EU) having a wavelength of 600 to 700 nm as the main wavelength.
- UOX Y 2 O 3 :EU
- nitride consisting of a compound of yttrium oxide (Y 2 O 3 ) and europium (EU) having a wavelength of 600 to 700 nm as the main wavelength.
- ) may be a phosphor or a fluoride-based phosphor.
- the fluoride compound KSF phosphor (K 2 SiF 6 ) which is an Mn 4+ activator phosphor advantageous for high color reproduction.
- the red phosphor may be a Mn(IV)-activated phosphor based on an oxidohalide host lattice.
- Mn(IV)-activated phosphors based on an oxidohalide host lattice can have an emission maximum in the range between 610 nm and 640 nm, high quantum yield, high color rendering and stability, and have the following general formula (I) or It can be expressed by general formula (II):
- A is selected from the group consisting of H and D and mixtures thereof, wherein D is deuterium;
- B is selected from the group consisting of Li, Na, K, Rb, Cs, NH 4 , ND 4 , NR 4 and mixtures of two or more thereof, wherein R is an alkyl or aryl radical;
- X is selected from the group consisting of F and Cl and mixtures thereof;
- M is selected from the group consisting of Cr, Mo, W, Re and mixtures of two or more thereof; 0 ⁇ a ⁇ 4; 0 ⁇ m ⁇ 10; and 1 ⁇ n ⁇ 10;
- A is selected from the group consisting of H and D and mixtures thereof, wherein D is deuterium;
- B is selected from the group consisting of Li, Na, K, Rb, Cs, Cu, Ag, Ti, NH 4 , ND 4 , NR 4 and mixtures of two or more thereof, wherein R is an alkyl or aryl radical;
- M is selected from the group consisting of Cr, Mo, W, Re and mixtures of two or more thereof;
- T is selected from the group consisting of Si, Ge, Sn, Ti, Pb, Ce, Zr, Hf and mixtures of two or more thereof; 0 ⁇ x ⁇ 1.
- green phosphor examples include LAP (LaPO 4 :Ce, Tb)-based phosphor or SiAlON-based phosphor, which is a compound of phosphoric acid (PO 4 ), lanthanum (La), and terbium (Tb) having a wavelength of 500 to 590 nm as the main wavelength.
- LAP LaPO 4 :Ce, Tb
- SiAlON-based phosphor which is a compound of phosphoric acid (PO 4 ), lanthanum (La), and terbium (Tb) having a wavelength of 500 to 590 nm as the main wavelength.
- blue phosphor examples include barium (Ba) and magnesium (Mg), aluminum oxide-based materials having a wavelength of 420 to 480 nm as the main wavelength, and BAM (BaMgAl 10 O 17 :EU), which is a compound of europium (EU). It may be a phosphor.
- the light transmitting layer 120 may have an upper surface and a lower surface having the same width, and the upper and lower surfaces may be perpendicular to a side surface of the light transmitting layer 120 .
- a width of the light transmitting layer 120 may be greater than a width of the light emitting diode chip 110 , and may be disposed to cover an upper surface of the light emitting diode chip 110 . Accordingly, the light-emitting area of the light-transmitting layer 120 may be relatively larger than that of the light-emitting diode chip 110 .
- the light transmitting layer 120 may have a rectangular shape, but is not limited thereto.
- the width of the upper surface of the light transmitting layer 120 may be greater than the width of the lower surface, and the side surface of the light transmitting layer 120 is reversed from the upper surface to the lower surface. slope can be formed.
- the structure may reduce absorption of light extracted from the light emitting diode chip 110 and improve extraction efficiency of light extracted laterally.
- the width of the upper surface of the light transmitting layer 120 may be greater than the width of the lower surface, and the side surface of the light transmitting layer 120 moves from the upper surface to the lower surface. It can form a reverse slope.
- the lower surface of the light transmitting layer 120 may be smaller than the width of the light emitting diode chip 110 .
- the width of the light emitting diode chip 110 may be smaller than the width of the upper surface of the light transmitting layer 120 and larger than the width of the lower surface of the light transmitting layer 120 .
- the light transmitting layer 120 becomes wider than the width of the light emitting diode chip 110 , an area absorbed by the light transmitting layer 120 may increase, so that the luminance of extracted light may be reduced. Accordingly, the light transmitting layer 120 preferably has a width similar to that of the light emitting diode chip 110 .
- the thickness of the light transmitting layer 120 may be formed to be greater than the thickness of the light emitting diode chip 110 , but is not limited thereto, and may be formed to be smaller than the thickness of the light emitting diode chip 110 .
- the thickness of the light transmitting layer 120 may be 50 ⁇ 300um thick. Since the light extracted from the light emitting diode chip 110 may be absorbed by the light transmitting layer 120 , it may be disposed to an appropriate thickness as needed.
- the light transmitting layer 120 may be a phosphor in glass (PIG) in which a phosphor is mixed with glass.
- PIG phosphor in glass
- the light transmitting layer 120 may be PIG, and the PIG is effective in preventing external substances such as moisture and dust from penetrating into the light emitting device 10 .
- the present invention is not limited thereto, and the light transmitting layer 120 may be disposed by mixing a phosphor with a ceramic such as polymer resin or glass.
- the light transmitting layer 120 is formed of a resin such as an epoxy resin or an acrylic resin
- the light transmitting layer 120 is formed by coating and curing a resin including a phosphor on the light emitting diode chip 110 . can be formed.
- the phosphor may be formed of particles of various sizes. Some of the phosphor particles mixed in the light transmitting layer 120 may have a diameter of 20 ⁇ m or more, and some may have a diameter of 7 ⁇ m or less. In addition, the phosphor emitting the same color gamut may include particles having a diameter of 20 ⁇ m or more and particles having a diameter of 7 ⁇ m or less, and may have various particle sizes therebetween.
- the light transmitting layer 120 may further include a diffusing agent.
- the diffusing agent should have a melting point that does not melt when the wavelength conversion material is plastically processed, and may be, for example, SiO 2 , TiO 2 and Al 2 O 3 .
- a light-transmitting adhesive layer 150 may be disposed between the light-transmitting layer 120 and the light-emitting diode chip 110 .
- the light-transmitting adhesive layer 150 may have light transmittance, and an organic adhesive such as a silicone resin or an epoxy resin, or an inorganic adhesive such as a low-melting-point glass may be used.
- the light-transmitting adhesive layer 150 may cover at least a portion of a side surface of the growth substrate of the light emitting diode chip 110 .
- the light-transmitting adhesive layer 150 may use a bonding method such as a direct bonding method such as compression, sintering, a hydroxyl bonding method, a surface activated aggregation method, an atomic diffusion bonding method, or the like.
- the sidewall 140 may be formed to surround the light emitting device 100 including the light emitting diode chip 110 and the light transmitting layer 120 .
- the side wall portion 140 may include an inner wall portion 141 positioned between the light emitting devices 100 and an outer wall portion 143 surrounding the outer surfaces of the light emitting devices 100 .
- a top surface of the inner wall portion 141 may be formed at the same level as a top surface of the light transmitting layer 120 .
- the upper surface of the inner wall portion 141 may be flat, but is not limited thereto, and may be concave or convex.
- the outer wall portion 143 may have an inner wall thickness t1 that is thicker than an outer wall thickness t2.
- the difference between the thickness t1 of the inner wall and the thickness t2 of the outer wall may be 100 ⁇ m or less, specifically, 60 ⁇ m or less.
- the inner wall may be formed to have a substantially similar height to an upper surface in contact with a side surface of the light transmitting layer 120 .
- the outer wall is a region in which the outer wall portion 143 is adjacent to the side surface of the substrate 200 , and may have an inclined surface in which the thickness of the outer wall portion 143 gradually decreases from the inner wall to the outer wall.
- the sidewall of the sidewall 140 may be formed on the same plane as the side of the substrate 200 below, but is not limited thereto.
- a side surface of the side wall part 140 may be formed inside rather than a side surface of the substrate 200 , or a side surface of the side wall part 140 may be in the form of an oblique line from the edge of the substrate 200 . and the like.
- the side wall portion 140 may be formed of a material having permeability and non-conductivity, and in this case, it is preferable to further include elasticity.
- the side wall portion 140 may be formed of an epoxy resin, a silicone resin, and an acrylic resin.
- the sidewall 140 may be formed by including at least one of the resin and a reflective material.
- the reflective material may include TiO2, SiO2, ZrO2, F6K2Ti, Al2O3, AlN and BN.
- the first groove 131 may be located in the sidewall 140 .
- at least a portion 131c of the first groove 131 may be positioned along side surfaces of the plurality of light transmitting layers 120 facing each other from the center of the upper surface of the inner wall portion 141 .
- a second groove 133 may be located in the outer wall portion 143 of the side wall portion of the present invention. In this case, the respective distances from the side surfaces of the plurality of light transmitting layers 120 to the first and second grooves 131 and 133 may be substantially the same.
- the first groove 131 may be located on an upper surface of the inner wall portion 141 formed at the same level as the upper surface of the light transmitting layer 120
- the second groove 133 may be formed on the outer wall portion 143 .
- the first groove 131 and the second groove 133 may include extension portions that extend longer than a width of the light transmitting layer 120 .
- the first groove 131 faces the first groove extension 131a and the second side 140b extending from the side surface of the light transmitting layer 120 facing the first side surface 140a. and may have a second groove extension 131b extending from a side surface of the light transmitting layer 120 .
- the shortest distance from the first side surface 140a to the end of the first groove extension 131a may be smaller than the shortest distance from the second side surface 140b to the end of the second groove extension part 131b.
- the distance from the first side surface 140a to the plurality of light transmitting layers 120 may be smaller than the distance from the second side surface 140b to the plurality of light transmitting layers 120, so that the first side surface ( 140a), a light blur phenomenon may occur. Accordingly, by forming the length of the first groove extension part 131a to be greater than the length of the second groove extension part 131b, the light scattering phenomenon to the first side surface 140a can be alleviated.
- the first and second groove extension portions 131a and 131b may also be formed in a second groove located on an inclined surface of the outer wall portion 143 .
- the outer wall portion 143 has a shape in which the thickness t2 of the outer wall from the substrate 200 is smaller than the thickness t1 of the inner wall. That is, the upper surface of the outer wall part 143 may have an inclined surface, and the first and second groove extension parts 131a and 131b may be positioned on the inclined surface.
- the distance d4 from the substrate 200 to the first groove extension 131a and the distance d5 to the second groove extension 131b are the distances d5 from the substrate 200 to the light transmitting layers ( 120) may be formed to be smaller than the distance d3 to the grooves 131c disposed between them.
- the width w1 of the groove 131 may be smaller than the first width w2 and the second width w3 of the inner wall portion 141 , and the first width w2 and the second width w3 ) can be largely similar.
- the width w1 of the groove 131 may be 5 ⁇ m to 70 ⁇ m. Preferably it may be 5um ⁇ 50um, more preferably 5um ⁇ 30um.
- the first width w2 and the second width w3 may be 10 ⁇ m to 110 ⁇ m. Preferably it may be 10um ⁇ 90um, more preferably 10um ⁇ 70um.
- the grooves 131 and 133 may be formed in a straight shape along the side surface of the light transmitting layer 120 , but are not limited thereto, and may be formed in other shapes.
- the grooves 131 and 133 may be positioned at intervals as indicated by dotted lines.
- the interval between the dotted lines may be narrower or wider than in the present embodiment.
- the dotted line may reduce light lost by the grooves 131 and 133 and improve light extraction efficiency.
- the depth of the grooves 131 and 133 may be formed not to exceed 1/2 in the depth direction from the upper surface to the lower surface of the light transmitting layer 120, but is not limited thereto.
- the grooves 131 and 133 may be formed by at least partially sintering the sidewall 140 by irradiating a laser, but is not limited thereto. It is possible to fill the part with a light-blocking material.
- the light emitting device can prevent light from being emitted through the sidewall 140 by the grooves 131 and 133 . Accordingly, the light emitting device of the present invention can prevent light blur from occurring near the edges of the plurality of light emitting diode chips 110 .
- 6A and 6B are a plan view and a cross-sectional view illustrating a light emitting device according to another embodiment of the present invention.
- the light emitting device 50 includes a substrate 200 , a plurality of light emitting diode chips 110 positioned on the substrate 200 , and a plurality of light emitting diode chips 110 positioned on an upper surface of the plurality of light emitting diode chips 110 .
- the first groove 131 , the second groove 133 , the third groove 135 , and the fourth groove 137 are disposed to surround the light transmitting layer 120 of the light transmitting layer 120 and the side surfaces of the plurality of light transmitting layers 120 .
- the first groove 131 and the third groove 135 may be located in the inner wall portion 141 of the plurality of sidewall portions 140
- the second groove 133 and the fourth groove 137 may be located on the outer wall portion 143 of the plurality of sidewall portions 140 .
- the first groove 131 and the second groove 133 may be disposed perpendicular to the third groove 135 and the fourth groove 137 .
- the first groove 131 and the second groove 133 may have extension portions passing through the fourth groove 137 .
- the third groove 135 and the fourth groove 137 may have extension portions passing through the second groove 133 .
- the extension parts may be located on the outer wall part 143 .
- first groove 131 and the third groove 135 may have an intersecting region in the inner wall portion 141 . Specifically, at least four corners of the plurality of light transmitting layers 120 may cross at right angles in an adjacent region.
- Each distance from the side surfaces of the plurality of light transmitting layers 120 to the first, second, third, and fourth grooves 131 , 133 , 135 , and 137 may be substantially the same.
- 7A and 7B are a plan view and a cross-sectional view of a light emitting device according to another embodiment of the present invention.
- the light emitting device 60 includes a substrate 200 , a plurality of light emitting diode chips 110 positioned on the substrate 200 , and a plurality of light emitting diode chips 110 positioned on an upper surface of the plurality of light emitting diode chips 110 .
- a light-emitting device 100 including a light-transmitting layer 120 of (120) may include grooves (131, 133, 137) and a dam (139) positioned to surround the side.
- the dam 139 is formed to be lower than the height of the light transmission layer 120 , but is not limited thereto, and may be disposed higher than the height of the light transmission layer 120 .
- the dam 139 may be formed in a rectangular ring shape to surround the light emitting diode chip 110 and at least a portion of the light transmitting layer 120 . Also, the dam 139 may be disposed inward from the side surface of the substrate 200 .
- the sidewall 140 may be disposed between the dam 139 and the light emitting device 100 .
- the dam 139 may be used as a frame to block the uncured liquid resin material when forming the sidewall 140 , and may be formed in close contact with the sidewall 140 .
- the side wall portion 140 may have an inclined surface whose thickness decreases from the upper surface of the light transmitting layer 120 toward the upper surface of the dam 139 .
- the dam 139 may be formed on the upper surface of the substrate 200 using a resin containing a reflective material.
- the dam 139 may be formed of the epoxy resin, the silicone resin, and the acrylic resin exemplified in the sidewall 140 .
- a white resin containing a light reflective material or a black resin containing a light absorbing material such as a black pigment may be used.
- FIG. 8 is a schematic cross-sectional view for explaining a light emitting device 70 according to another embodiment of the present invention.
- the light emitting device 70 according to the present embodiment is substantially similar to the light emitting device 10 described with reference to FIGS. 1A to 1E , but there is a difference in the structure of the sidewall portion.
- the first groove 131 may be disposed on the upper surface of the inner wall portion 141 .
- the first groove 131 may be filled with a light blocking material as described above.
- the first groove 131 is disposed between the light-transmitting layers 120 to block light emitted from the light-transmitting layer 120 from being emitted through the inner wall portion 141 , and accordingly, light scattering of the light-emitting device phenomenon can be prevented.
- the outer wall portion 143 may include a plurality of outer wall portions 143a, 143b, and 143c.
- the first outer wall portion 143a surrounds outer surfaces of the light emitting diode chips 110 .
- An upper end of the first outer wall portion 143a may be in contact with the light transmitting layer 120 .
- the upper end of the first outer wall portion 143a may be positioned higher than the upper surface of the light emitting diode chip 110 , and may be positioned below 1/2 of the thickness of the light transmitting layer 120 .
- the upper end of the first outer wall portion 143a may be positioned at the same height as the upper surface of the light-transmitting adhesive layer 150 , that is, the lower surface of the light-transmitting layer 120 .
- the second outer wall portion 143b surrounds the first outer wall portion 143a and further surrounds outer surfaces of the light transmitting layers 120 .
- the second outer wall portion 143b may be in contact with side surfaces of the light transmitting layers 120 .
- the second outer wall portion 143b may have a greater width than the first and third outer wall portions 143a and 143c.
- a bottom surface of the second outer wall portion 143b may be in contact with the substrate 200 , and an inner surface of the second outer wall portion 143b may be in contact with the first outer wall portion 143a and the transmission layer 120 , and the second outer wall portion
- the outer surface of the (143b) may be in contact with the third outer wall portion (143c).
- the upper surface of the second outer wall portion 143b extends from the upper surface of the third outer wall portion 143c and the upper surface of the light transmitting layer 120, and the upper surface of the second outer wall portion 143b has a curved shape in at least some regions.
- the width of the second outer wall portion 143b in a region in contact with the bottom surface of the transmission layer may be greater than the width of the bottom surface, and a width in an area in contact with the bottom surface of the transmission layer may be smaller than the width of the top surface.
- the width of the bottom surface of the second outer wall portion 143b may be less than 1/2 of the width of the upper surface.
- the third outer wall portion 143c surrounds the second outer wall portion 143b.
- the third outer wall portion 143c forms an outer sidewall of the light emitting device 70 .
- the third outer wall portion 143c may have a shape that becomes wider as it approaches the substrate 200 .
- the inner surface of the third outer wall portion 143c may be formed as a curved surface, and the outer surface may be formed as a flat surface parallel to the side surface of the substrate 200 .
- the outer surface of the third outer wall portion 143c may be parallel to the side surface of the substrate 200 .
- the bottom surface of the third outer wall portion 143c may be in contact with the substrate 200 , and the lower end of the inner surface may have an inclination angle of 70 degrees or more and less than 100 degrees with respect to the substrate 200 and is spherical. As a result, it may have an inclination angle of 80 degrees or more and less than 90 degrees.
- the first to third outer wall portions 143a , 143b , and 143c may be formed of a silicone resin, an epoxy resin, or an acrylic resin, and may include at least one type of the resin and a reflective material together.
- the reflective material may include TiO2, SiO2, ZrO2, F6K2Ti, Al2O3, AlN and BN.
- the second outer wall portion 143b may be formed of a material different from that of the first and third outer wall portions 143a and 143c.
- the first outer wall portion 143a and the third outer wall portion 143c may be formed of the same type of resin including a reflective material
- the second outer wall portion 143b may be formed of the first and third outer wall portions.
- (143a, 143c) is formed of the same or different type of resin, and may include a material for preventing cracks, for example, a material containing calcium.
- the width of the second outer wall portion 143b may be controlled to reduce light loss.
- the maximum width of the second outer wall portion 143b may be 1500 ⁇ m or less, and specifically, the maximum width may be 300 ⁇ m to 1000 ⁇ m.
- the maximum width of the second outer wall portion 143b is 600 ⁇ 1000um, it is possible to effectively prevent cracks and reduce light loss.
- the inner wall portion 141 may be formed of the same material as the first outer wall portion 143a, but is not limited thereto, and may be formed of the same material as the second outer wall portion 143b.
- the light transmitting adhesive layer 150 may include a region disposed between the light emitting diode chip 110 and the light transmitting layer 120 and a region surrounding the side surface of the light emitting diode chip 110 .
- a region of the light-transmitting adhesive layer 150 surrounding the side surface of the light emitting diode chip 110 may be in contact with the inner wall portion 141 and the first outer wall portion 143a.
- the thickness of the light-transmitting adhesive layer 150 disposed on the upper surface of the light emitting diode chip 110 may be different from the thickness of a region surrounding the side surface of the light emitting diode chip 110 .
- the light-transmitting adhesive layer 150 disposed on the upper surface of the light emitting diode chip 110 may have a thickness of 2 ⁇ m or more and 10 ⁇ m or less. Meanwhile, the light-transmitting adhesive layer 150 formed on the side surface of the light emitting diode chip 110 may have a smaller width as it approaches the substrate 200 . The light-transmitting adhesive layer 150 may cover a portion of the side surface of the light emitting diode chip 110 or may cover the entire side surface.
- the outer wall portion 143 may have a different width depending on the location. As shown in FIG. 8 , the right outer wall portion 143 may have a greater width than the left outer wall portion 143 . In particular, the width of the third outer wall portion 143c may be different depending on the location. However, the difference in the width of the outer wall portion 143 according to the location is controlled so as not to affect the optical profile, for example, may be 100 um or less, further, 50 um or less.
- the outer wall portion 143 since the outer wall portion 143 includes the plurality of outer wall portions 143a, 143b, and 143c, it is possible to prevent light from spreading through the outer wall portion 143. Accordingly, the second groove formed on the outer wall portion 143 in the previous embodiments may be omitted.
- FIG. 9 is a schematic cross-sectional view for explaining a light emitting device 80 according to another embodiment of the present invention.
- the light emitting device 80 is substantially similar to the light emitting device 70 described with reference to FIG. 8 , but a single light transmitting layer 120 includes a plurality of light emitting diode chips 110 . There is a difference in covering
- one light transmitting layer 120 covers the plurality of light emitting diode chips 110 disposed on the substrate 200 . Light emitted from the light emitting diode chips 110 is emitted to the outside through the same light transmitting layer 120 . Accordingly, the inner wall portion 141 is disposed between the light emitting diode chips 110 under the light transmitting layer 120 , and the aforementioned first groove is omitted.
- the outer wall portion 143 includes a plurality of outer wall portions 143a , 143b , and 143c to prevent light scattering, thus preventing light interference between light emitting devices. can do.
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Abstract
Description
Claims (20)
- 기판;상기 기판 상부에 위치하는 복수의 발광다이오드 칩;상기 복수의 발광다이오드 칩의 상면에 위치하는 복수의 광 투과층;상기 복수의 발광다이오드 칩 및 상기 복수의 광 투과층을 둘러싸는 측벽부; 및상기 광 투과층들 사이에 위치하는 상기 측벽부의 적어도 일부의 상면에 위치하는 제1 홈;을 포함하며,상기 제1 홈은 가장 인접한 광 투과층에서 상기 제1 홈까지의 최단 폭보다 작은 폭을 가지고, 가장 인접한 상기 광 투과층의 두께보다 작은 깊이를 갖는 발광 장치.
- 청구항 1에 있어서,상기 기판은 상면 및 하면에 패턴 전극을 갖고, 상기 상면 및 하면의 패턴 전극을 전기적으로 연결하는 비아를 포함하는 회로 패턴을 갖는 발광 장치.
- 청구항 1에 있어서,상기 복수의 광 투과층은 파장변환물질을 포함하는 발광 장치.
- 청구항 3에 있어서,상기 복수의 광 투과층의 상면의 폭과 하면의 폭이 동일한 것을 특징으로 하는 발광 장치.
- 청구항 4에 있어서,상기 복수의 광 투과층의 하면의 폭은 각각 상기 복수의 발광다이오드 칩의 폭보다 큰 발광 장치.
- 청구항 3에 있어서,상기 복수의 광 투과층의 상면의 폭이 하면의 폭보다 큰 발광 장치.
- 청구항 1에 있어서,상기 측벽부는,상기 복수의 발광다이오드 칩 및 상기 복수의 광 투과층의 외측면을 둘러싸는 외벽부; 및상기 복수의 발광다이오드 칩 및 상기 복수의 광 투과층이 마주보는 측면 사이에 형성되는 내벽부를 포함하는 발광 장치.
- 청구항 7에 있어서,상기 외벽부는 상기 광 투과층의 측면과 인접한 면에서 멀어질수록 상기 기판으로부터의 두께가 얇아지는 경사면을 갖는 발광 장치.
- 청구항 1에 있어서,상기 복수의 광 투과층들의 외측면을 둘러싸는 측벽부의 상면에 형성된 제2 홈을 더 포함하고,상기 제1 홈 및 제2 홈은 상기 복수의 광 투과층의 측면을 따라 길게 늘어진 형상을 갖는 발광 장치.
- 청구항 9에 있어서,상기 기판으로부터 상기 제1 홈까지의 최단 거리는 상기 기판으로부터 상기 제2 홈까지의 최단 거리보다 큰 발광 장치.
- 청구항 9에 있어서,상기 기판은 제1 측면 및 상기 제1 측면과 반대에 위치하는 제2 측면을 포함하고,상기 제1 측면으로 연장된 제1 홈연장부 및 상기 제2 측면으로 연장된 제2 홈연장부를 갖는 발광 장치.
- 청구항 11에 있어서,상기 제1 홈연장부의 길이는 제2 홈연장부의 길이보다 큰 발광 장치.
- 청구항 11에 있어서,상기 측벽부는 외벽부 및 내벽부를 포함하고,상기 제1 홈연장부 및 상기 제2 홈연장부는 상기 외벽부에 위치하는 발광 장치.
- 청구항 13에 있어서,상기 제1 측면과 상기 제1 홈연장부 끝단까지의 거리는 상기 제2 측면과 상기 제2 홈연장부 끝단까지의 거리보다 작은 발광 장치.
- 청구항 9에 있어서,상기 제1 홈 및 제2 홈과 직교하며, 상기 복수의 광 투과층 측면에 위치하는 제3 홈 및 제4 홈을 더 포함하는 발광 장치.
- 청구항 15에 있어서,상기 복수의 광 투과층의 측면으로부터 상기 제1, 제2, 제3 및 제4 홈까지의 각각의 거리가 실질적으로 동일한 발광 장치.
- 청구항 15에 있어서,상기 제1 홈 및 제2 홈은 상기 제4 홈을 지나 상기 외벽부에 위치하는 연장부를 갖고,상기 제3 홈 및 제 4홈은 상기 제2 홈을 지나 상기 외벽부에 위치하는 연장부를 갖는 발광 장치.
- 청구항 17에 있어서,상기 제1 홈과 상기 제 3홈은 상기 복수의 광 투과층의 적어도 4개의 모서리가 인접하는 영역에서 수직으로 교차하는 발광 장치.
- 기판;상기 기판 상부에 위치하는 복수의 발광다이오드 칩;상기 복수의 발광다이오드 칩의 상면에 위치하는 광 투과층; 및상기 복수의 발광다이오드 칩 및 상기 광 투과층을 둘러싸는 측벽부를 포함하며,상기 측벽부는 상기 복수의 발광 다이오드 칩의 외측면을 둘러싸는 제1 외벽부, 상기 제1 외벽부를 둘러싸는 제2 외벽부, 및 상기 제2 외벽부를 둘러싸는 제3 외벽부를 포함하고,상기 제2 외벽부는 상기 광 투과층의 측면에 접하는 발광 장치.
- 청구항 19에 있어서,상기 제2 외벽부는 칼슘을 함유하는 크랙 방지 물질을 포함하는 발광 장치.
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CN202180090493.0A CN116745910A (zh) | 2020-11-20 | 2021-11-16 | 发光装置 |
KR1020237020648A KR20230107870A (ko) | 2020-11-20 | 2021-11-16 | 발광 장치 |
EP21895070.7A EP4231346A1 (en) | 2020-11-20 | 2021-11-16 | Light-emitting device |
US18/200,329 US20240079537A1 (en) | 2020-11-20 | 2023-05-22 | Light emitting device |
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Citations (5)
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JP2004172443A (ja) * | 2002-11-21 | 2004-06-17 | Sumitomo Bakelite Co Ltd | ダイアタッチペースト及び半導体装置 |
US20160372528A1 (en) * | 2013-12-06 | 2016-12-22 | Sharp Kabushiki Kaisha | Light-emitting substrate, photovoltaic cell, display device, lighting device, electronic device, organic light-emitting diode, and method of manufacturing light-emitting substrate |
KR20190085479A (ko) * | 2018-01-10 | 2019-07-18 | 서울반도체 주식회사 | 발광 장치 |
KR20200012604A (ko) * | 2018-07-27 | 2020-02-05 | 엘지디스플레이 주식회사 | 표시장치 |
JP6733646B2 (ja) * | 2017-11-30 | 2020-08-05 | 日亜化学工業株式会社 | 発光装置とその製造方法 |
-
2021
- 2021-11-16 CN CN202180090493.0A patent/CN116745910A/zh active Pending
- 2021-11-16 EP EP21895070.7A patent/EP4231346A1/en active Pending
- 2021-11-16 KR KR1020237020648A patent/KR20230107870A/ko unknown
- 2021-11-16 WO PCT/KR2021/016798 patent/WO2022108302A1/ko active Application Filing
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2023
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Patent Citations (5)
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JP2004172443A (ja) * | 2002-11-21 | 2004-06-17 | Sumitomo Bakelite Co Ltd | ダイアタッチペースト及び半導体装置 |
US20160372528A1 (en) * | 2013-12-06 | 2016-12-22 | Sharp Kabushiki Kaisha | Light-emitting substrate, photovoltaic cell, display device, lighting device, electronic device, organic light-emitting diode, and method of manufacturing light-emitting substrate |
JP6733646B2 (ja) * | 2017-11-30 | 2020-08-05 | 日亜化学工業株式会社 | 発光装置とその製造方法 |
KR20190085479A (ko) * | 2018-01-10 | 2019-07-18 | 서울반도체 주식회사 | 발광 장치 |
KR20200012604A (ko) * | 2018-07-27 | 2020-02-05 | 엘지디스플레이 주식회사 | 표시장치 |
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EP4231346A1 (en) | 2023-08-23 |
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