Illumination module and lighting device including the same

Abstract

To provide a lighting module that applies light emitted from a plurality of light emitting devices as a line-shaped light source or a surface light source.SOLUTION: A lighting module 200 comprises: a substrate 210; a plurality of light emitting devices 105 disposed on the substrate; a first reflective layer 230 disposed on the substrate; a resin layer 220 disposed on the first reflective layer and the light emitting devices; and a second reflective layer 240 disposed on the resin layer. The resin layer comprises: a front surface S1 on which light generated from the plurality of light emitting devices is emitted; a rear surface S2 facing the front surface; and a first side surface S3 and a second side surface S4 that are opposite to each other and connect the front surface and the rear surface with each other. A distance between the first reflective layer and the second reflective layer is smaller than a distance between the front surface and the rear surface of the resin layer, and the front surface of the resin layer has a plurality of convex portions P0 convex toward the front surface from the light emitting devices and a plurality of concave portions C1, C2 recessed toward the rear surface between the plurality of convex portions.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] An embodiment of the invention relates to a lighting module having a plurality of light emitting elements.

[0002] An embodiment of the invention relates to a lighting module that provides a line-shaped surface light source. be.

[0003] The embodiment relates to a lighting device having a lighting module.

[0004] The embodiments relate to a light unit having a lighting module, a liquid crystal display device, and a vehicle lamp. This is what we do. [Background technology]

[0005] The application of general lighting is not only vehicle lighting but also display and signboard backlighting. Includes lights.

[0006] Light-emitting elements, such as light-emitting diodes (LEDs), are more efficient than existing light sources such as fluorescent lamps and incandescent lamps. It has advantages such as low power consumption, semi-permanent life, fast response speed, safety, and environmental friendliness. Such a light-emitting element is suitable for various display devices and various lighting devices such as indoor or outdoor lights. It is used.

[0007] Recently, lamps that use light-emitting elements have been proposed as vehicle light sources. In comparison, light-emitting elements have the advantage of low power consumption. Since the angle of light emitted from the light emitting element is small, when the light emitting element is used as a vehicle lamp, Therefore, there is a demand for increasing the light emitting area of ​​a lamp using a light emitting element.

[0008] The light emitting element is small in size, which allows for greater freedom in lamp design and is semi-permanent. It is also economical due to its longevity. Summary of the Invention [Problem to be solved by the invention]

[0009] In an embodiment of the present invention, light emitted from a plurality of light emitting elements is converted into a line-shaped light source or a surface light source. The present invention provides a lighting module that provides illumination.

[0010] An embodiment of the invention is a lighting module in which a resin layer having a light emitting element is disposed between a plurality of reflective layers. Provide the rules.

[0011] An embodiment of the invention is a lighting module for illuminating a line-shaped side light source or a surface light source, and A lighting device having the same is provided.

[0012] The embodiments of the invention include a light unit having a lighting module, a liquid crystal display device, a vehicle lamp, Provide a pool. [Means for solving the problem]

[0013] The lighting module according to an embodiment of the invention comprises a substrate, a light emitting element disposed on the substrate, a first reflective layer disposed on the substrate; and a resin layer disposed on the first reflective layer; a second reflective layer disposed on the resin layer, the resin layer being configured to reflect light emitted from the light-emitting element; The front surface of the resin layer includes a plurality of protrusions and a plurality of recesses. This can be done.

[0014] According to an embodiment of the present invention, a plurality of the light emitting elements are arranged on the substrate, and the resin a layer disposed to surround the light-emitting element, the resin layer having a rear surface facing the front surface; and a first side surface and a second side surface opposite each other, connecting the front surface and the rear surface, The distance between the reflective layer and the second reflective layer is the distance between the front surface and the rear surface of the resin layer. The convex portion on the front surface is formed in a convex shape in a direction from the light emitting element to the front surface, The recessed portion on the front surface is formed between the plurality of protruding portions so as to be recessed toward the rear surface.

[0015] According to an embodiment of the invention, the first reflective layer has holes through which the plurality of light emitting elements pass. It is possible.

[0016] According to an embodiment of the invention, the distance between the first and second side surfaces of the resin layer is and the rear surface.

[0017] According to an embodiment of the invention, the front and rear first and second sides of the resin layer are and the second reflective layer, and the resin layer is a surface between the first reflective layer ... It can emit light.

[0018] According to an embodiment of the invention, the convex portion has a curved surface protruding from the resin layer toward the front surface. The lens portion may include a lens portion.

[0019] According to an embodiment of the present invention, the lens portion is a region facing the center of the light emitting element. For example, the distance to the light emitting element can be the maximum distance.

[0020] According to an embodiment of the invention, the thickness of the lens portion is the distance between the first and second reflective layers. or the thickness thereof is the same as that of the resin layer.

[0021] According to an embodiment of the invention, the thickness of the resin layer is less than or equal to twice the thickness of the light emitting element. It can have.

[0022] According to an embodiment of the invention, each of the plurality of protrusions is the recessed portion faces the area between the plurality of light-emitting elements, and the light-emitting surface of the light-emitting element is disposed so as to face the protrusion.

[0023] According to an embodiment of the invention, the plurality of convex portions include first and second convex portions, and the plurality of light emitting The element includes first and second light emitting elements arranged in a first direction, and the resin layer has a rear surface and a front surface. In a second direction toward the front, the first convex portion overlaps with the first light emitting element, and the second convex portion overlaps with the front It overlaps with the second light-emitting element.

[0024] According to an embodiment of the invention, the recessed portion is recessed toward the rear surface between the first and second protruding portions. The light emitting element may have a curved surface corresponding to the area between the first and second light emitting elements.

[0025] According to an embodiment of the invention, the light emitted from the plurality of light emitting elements is The light is totally reflected by the reflective layer and emitted through the front surface.

[0026] According to an embodiment of the invention, the first and second reflective layers are disposed in front of the resin layer. The convex portion and the concave portion may have shapes corresponding to each other.

[0027] According to an embodiment of the invention, the substrate has the protrusions and the It may have a shape corresponding to the shape of the recess.

[0028] According to an embodiment of the invention, the rear surface of the resin layer, the first side surface and the second side surface are arranged 3. It may contain a reflective layer.

[0029] According to an embodiment of the invention, the number of the convex portions of the resin layer is the same as the number of the light-emitting elements. That's fine.

[0030] According to an embodiment of the invention, the first reflective layer is in contact with the lower surface of the resin layer, and the second reflective layer is in contact with the lower surface of the resin layer. The layer can contact the top surface of the resin layer.

[0031] The lighting module according to an embodiment of the invention comprises a substrate and a plurality of light emitting elements disposed on the substrate. an optical element; a first reflective layer disposed on the substrate; and a resin layer disposed on the first reflective layer. a resin layer and a second reflective layer disposed on the resin layer, the resin layer The front surface of the resin layer includes a plurality of protrusions and a complex surface from which light generated from the light emitting element is emitted. The plurality of protrusions and the plurality of recesses have the same height, and the plurality of projections and the plurality of recesses have the same height. The optical element includes a first light emitting element, a second light emitting element, and a light emitting element between the first light emitting element and the second light emitting element. the plurality of protrusions are arranged on a first light emitting element facing the first light emitting element; a second convex portion corresponding to the second light emitting element and a third convex portion facing the third light emitting element; It can include. [Effects of the Invention]

[0032] According to embodiments of the invention, the luminous intensity of the light source can be improved.

[0033] According to an embodiment of the invention, a line-shaped surface light source can be provided.

[0034] According to embodiments of the invention, the process steps for manufacturing a lighting module can be reduced.

[0035] According to embodiments of the invention, light loss can be reduced and light efficiency can be improved.

[0036] According to an embodiment of the invention, a thin lighting module is provided in the form of a line light source, so that the device This allows for increased design freedom.

[0037] According to the embodiments of the invention, the light uniformity of the surface light source can be improved.

[0038] Improved optical reliability of the lighting module and the lighting device having the same according to the embodiment of the invention It can be done.

[0039] Improving the reliability of a vehicle lighting device having a lighting module according to an embodiment of the invention can be done.

[0040] The embodiments of the invention include a light unit having a lighting module, various display devices, and surface light source lighting. The present invention can be applied to devices and vehicle lamps. [Brief explanation of the drawings]

[0041] [Figure 1] 1 is a perspective view of a lighting module according to an embodiment of the invention; [Figure 2] 2 is a cross-sectional side view of the lighting module of FIG. 1 taken along line B-B. [Figure 3] 2 is a cross-sectional side view of the lighting module of FIG. 1 taken along the line CC. [Figure 4] 2 is an example of a partial plan view of the lighting module of FIG. 1. [Figure 5] 2 is an example of light extraction from the lighting module of FIG. 1. [Figure 6] This is an example in which the length of the lighting module in FIG. 1 is modified. [Figure 7] FIG. 2 is an exploded perspective view of the lighting module of FIG. 1. [Figure 8] 2 is a diagram illustrating a manufacturing process of the lighting module of FIG. 1. [Figure 9] 2 is a diagram illustrating a manufacturing process of the lighting module of FIG. 1. [Figure 10]2 is a diagram illustrating a manufacturing process of the lighting module of FIG. 1. [Figure 11] 2 is a diagram illustrating a manufacturing process of the lighting module of FIG. 1. [Figure 12] 2 is a diagram illustrating a manufacturing process of the lighting module of FIG. 1. [Figure 13] 2 is a diagram illustrating a manufacturing process of the lighting module of FIG. 1. [Figure 14] 3 is another example of the lighting module of FIG. 2. [Figure 15] 1 is an example of a lighting module according to an embodiment of the invention, with a flat front surface. [Figure 16] 10 is an example in which the curvature of the convex portion is changed in the lighting module according to the embodiment of the invention. [Figure 17] 10 is an example in which the curvature of the convex portion is changed in the lighting module according to the embodiment of the invention. [Figure 18] 10 is an example in which the curvature of the convex portion is changed in the lighting module according to the embodiment of the invention. [Figure 19] 10 is an example in which the curvature of the convex portion is changed in the lighting module according to the embodiment of the invention. [Figure 20] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 21] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 22] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 23] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 24] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 25] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 26] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 27]10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 28] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 29] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 30] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 31] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 32] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 33] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 34] 10 shows modified examples of the convex portion and the concave portion in the lighting module according to the embodiment of the invention. [Figure 35] 10 is an example of a lighting module according to an embodiment of the present invention, in which the distance between the light emitting element and the front surface is modified. [Figure 36] 10 is an example of a lighting module according to an embodiment of the present invention, in which the distance between the light emitting element and the front surface is modified. [Figure 37] 2 is a diagram showing a lighting image and its distribution by the lighting module of FIG. 1. [Figure 38] 16 is a diagram showing a lighting image and light distribution of the lighting module of FIG. 15. [Figure 39] 1 is an example of a lamp to which a lighting module according to an embodiment of the invention is applied. [Figure 40] 1 is a front view of a light-emitting element applied to a lighting module according to an embodiment of the present invention; [Figure 41] This is an example of a module in which the light emitting element of FIG. 40 is arranged on a circuit board. [Figure 42] 42 is a diagram of the module of FIG. 41 viewed from the other side. DETAILED DESCRIPTION OF THE INVENTION

[0042]

[0023] The following description, taken in conjunction with the accompanying drawings, is provided to those skilled in the art to which the present invention pertains. A detailed description of a preferred embodiment of the present invention will now be given. The embodiment and the configuration shown in the drawings are merely preferred embodiments of the present invention and are not intended to be limiting unless otherwise specified. It should be understood that there are numerous equivalents and alternatives that may be substituted therefor.

[0043] In detailing the principles of operation for the preferred embodiment of the present invention, When it is determined that a detailed description of the intellectual function or configuration unnecessarily distracts from the gist of the present invention The terms used below are defined in consideration of the functions in the present invention. As terms defined above, the meaning of each term shall be interpreted based on the overall content of this specification. For parts with similar functions and actions throughout the drawings, the same drawings should be used. Use the sign.

[0044] The lighting device according to the present invention can be used in a variety of lamp devices that require lighting, such as vehicle lamps, It can be applied to home lighting devices and industrial lighting devices. For example, it can be applied to vehicle lamps. In this case, headlights, width lights, side mirror lights, fog lights, tail lights, braking Lights, daytime running lights, vehicle interior lighting, door scarves, rear combination lights The lighting device of the present invention can be applied to indoor and outdoor advertising, It can also be applied to devices, display devices, and various train fields. It is currently being implemented, and will be realized in the future with technological development in all lighting-related fields and advertising-related fields. What kind of application is possible?

[0045] The following embodiments will become clearer from the accompanying drawings and the description of the embodiments. In the description of the embodiments, each layer, region, pattern or structure may be referred to as a substrate, each layer, region, pad or When a material or pattern is described as being formed "on" or "under," the term "on" or "under" the material or pattern is used. "On" and "under" mean "directly" or "indirectly through another layer." In addition, the reference to the top or bottom of each layer is explained based on the drawings. do.

[0046] [Lighting module] FIG. 1 is a perspective view showing a lighting module according to an embodiment of the present invention, and FIG. 2 is a perspective view showing the lighting module of FIG. 3 is a cross-sectional view of the lighting module of FIG. 1 taken along line B-B; FIG. 4 is a cross-sectional view of the lighting module of FIG. 1 taken along line C-C; 4 is an example of a partial plan view of the lighting module of FIG. 1, and FIG. 5 is an example of a partial plan view of the lighting module of FIG. 6 shows an example of light extraction, in which the length of the lighting module in FIG. 1 is modified, and FIG. 7 shows an example of the same module in FIG. FIG. 2 is an exploded perspective view of the lighting module.

[0047] 1 to 6, a lighting module 200 according to an embodiment of the invention may include one or more The light emitted from the light emitting elements 105 is converted into a linear surface light source. The light emitted from the light emitting element 105 is emitted at a constant height in the vertical direction. The light is emitted as a light source having a certain brightness.

[0048] The lighting module 200 includes a substrate 210 and a resin layer 22 disposed on the substrate 210. The second reflective layer 240 may be disposed on the resin layer 220. The lighting module 200 includes a first reflective layer 230 between the substrate 210 and the resin layer 220. It can include.

[0049] As shown in FIGS. 2 and 3, the lighting module 200 has a length X1 in a first direction X and a length X2 in a second direction X. The length in the first and second directions X and Y is greater than the thickness in the perpendicular direction Z. The length X1 in the first direction is greater than the number of light emitting elements 105. The width Y1 in the second direction can be varied depending on the number of the first and second electrodes, and can be, for example, 30 mm or more. The width Y1 of the lighting module 200 in the second direction Y may be 6 mm or more. The area where the light emitted from the light element 105 is diffused and the area that protects the rear of the light emitting element 105 are defined. The lighting module 200 may be a flexible module or The lighting module 200 may be a rigid module. The first and second directions X and Y are formed flat or flexible. Good too.

[0050] The lighting module 200 may include a front surface S1 facing the light emitting device 105, a rear surface S2 opposite the front surface S1, and a plurality of side surfaces S3 and S4 extending in a second direction from both ends of the front surface S1 and the rear surface S2. The rear surface S2 extends in a first direction X, and the front surface S1 may face the rear surface S1 and may have a curved surface. The lengths of the front surface S1 and the rear surface S2 in the first direction X are greater than their heights or thicknesses in the vertical direction. The maximum lengths of the front surface S1 and the rear surface S2 in the first direction X may be the same or different. The heights or thicknesses of the front surface S1 and the rear surface S2 in the vertical direction may be the same. The plurality of side surfaces S3 and S4 include a first side surface S3 and a second side surface S4 facing each other. The front surface S1 and the rear surface S2 may have a long length in the first direction X. The first side surface S3 and the second side surface S4 may face each other in a second direction Y perpendicular to the first direction X. The front surface S1 faces the light emitting surface 111 of the light emitting element 105 or faces the first side surface S3 and the second side S 4 The rear surface S2 may be a surface exposed in the second direction from the first end of the light emitting element 105. 3 and the second side S 4 The first and second side surfaces S3 and S4 may be surfaces exposed in the second direction from the second end of the light emitting element 105. The first and second side surfaces S3 and S4 may be different from the front surface S1 and rear surface S2. The rear surface of the light emitting element 105 may be the surface opposite to the light emitting surface 111.

[0051] The respective sides S1, S2, S3, and S4 of the lighting module 200 are 00, may be the side of the resin layer 220 that has the greatest thickness.

[0052] In the lighting module 200, a plurality of light emitting elements 105 are arranged in a first direction. The light emitting elements 105 are arranged in two or more in the first direction, for example, n (n=2 or more). The plurality of light emitting elements 105 may be arranged on a straight line extending in the first direction X. The plurality of light emitting elements 105 are arranged in a row. The light emitting elements 105 may be arranged in two rows, and the elements in the two rows may be arranged in a zigzag pattern. The front surface or the light emitting surface may be exposed in the second direction Y. The side and rear surfaces may be non-light-emitting surfaces.

[0053] The plurality of light emitting elements 105 may face the front surface S1. The light emitting element 105 may have an exit surface 111 facing the front surface S1. The light emitted from the first side S5 is emitted through the front surface S1, and a part of the light is emitted through the rear surface S2 and the first side surface S The light is emitted from at least one of the light emitting element 105 and the second side surface S4. Most of the light emitted from the front surface S1 is emitted through the front surface S1.

[0054] As shown in FIG. 4, the light emitting element 105 is used as a reference, and the distance between the light emitting element 105 and the front surface S1 is The distance D2 between the light emitting element 105 and the rear surface S2 is different from the distance D3 between the light emitting element 105 and the rear surface S2. The distance D3 between 105 and the rear surface S2 may be 2 mm or more, for example, 2 mm to 20 mm. The distance D3 between the light emitting element 105 and the rear surface S2 may be in the range of mm. If the thickness is smaller than this range, moisture may penetrate and the area where the circuit pattern can be formed may become small. If the distance is greater than this range, the size of the lighting module 200 will be large. D2 is the maximum distance and can be 5 mm or more, and can range from 5 mm to 20 mm. If the distance D2 is smaller than the above range, hot spots may occur. If it is greater than the above range, the module size will be large.

[0055] 1 to 3, the lighting module 200 includes a plurality of protrusions P0 (P1, P2 , P3) and at least one recess C1, C2. P1, P2, P3) may be at least two or more, or may be n (n=2 or more). The plurality of protrusions P0 (P1, P2, P3) are arranged in a first direction in which the plurality of light emitting elements 105 are arranged. The plurality of electrodes may be arranged in a direction perpendicular to the first direction and may protrude in a convex shape in a second direction perpendicular to the first direction. The convex portions P0 (P1, P2, P3) can face the plurality of light emitting elements 105. Each of the plurality of protrusions P0 (P1, P2, P3) is connected to the light emitting element 105 (101, 102, 103). That is, the protrusion P 0 (P1, P2, P3) are closer to the center of the light emitting element 105, The distance to the optical element 105 increases.

[0056] The protrusions P0 (P1, P2, P3) are provided for the light emitting elements 105. The recesses C1 and C2 can protrude in the direction of the front surface S1. The protrusions P1, P2, and P3 have convex curved surfaces. The recesses C1 and C2 may include a concave curved surface. The first recesses C1, C2 have a radius of curvature larger than the radius of the first curvature. The second curvature may have a smaller radius.

[0057] In the convex portion P0 (P1, P2, P3), the front surface S1 has a constant height, and the upper and lower surfaces are The front surface S1 is provided in a horizontal plane. The front surface S1 is provided in a plane perpendicular to the third direction Z. The surface S2, the first side surface S3, and the second side surface S4 are provided as surfaces perpendicular to the third direction. S2 is disposed in a direction perpendicular to the first side surface S3 and the second side surface S4. The direction Z may be perpendicular to the first and second directions X and Y. The front surface S1 may include a surface inclined with respect to the third direction Z. The surface S2, the first side surface S3, and the second side surface S4 have the same thickness or height in the third direction Z. It can have.

[0058] The resin layer 220 is disposed between the substrate 210 and the second reflective layer 240. The resin layer 220 is disposed between the upper surface of the substrate 210 and the lower surface of the second reflective layer 240. The resin layer 220 has the front surface S1, the rear surface S2, the first side surface S3, and the second side surface S4. The resin layer 220 includes a plurality of light emitting elements 105 arranged on the substrate 210. You can bury it.

[0059] The lighting module 200 includes a first reflective layer 2 between the resin layer 220 and the substrate 210. The resin layer 220 may include a light-transmitting layer. 0 may include glass as another material.

[0060] The plurality of light emitting elements 105 (101, 102, 103) are adjacent to the first side surface S3, for example. a first light emitting element 101 adjacent to the second side surface S4; a third light emitting element 103 adjacent to the first side surface S5; and at least one or more second light emitting elements disposed between the third light emitting elements 101 and 103. The light emitting element 102 may include n light emitting elements (n is 2 or more), as described below. For convenience of explanation, the following description will be given using three light emitting elements as an example. .

[0061] The protrusions P1, P2, and P3 are a first protrusion P1 corresponding to the first light emitting element 101, A second protrusion P2 corresponding to the second light emitting element 102 and a third protrusion P3 corresponding to the third light emitting element 103 are provided. The recesses C1 and C2 may include the first and second protrusions P1 and P3. 2, and the first recess C1 disposed between the second and third protrusions P2 and P3. Each of the first to third protrusions P1, P2, and P3 may include a second recess C2. The light emitting surfaces 111 of the first to third light emitting elements 101, 102, and 103 face each other. This can be done.

[0062] The first protrusion P1 overlaps the first light emitting element 101 in the second direction Y, and the second protrusion P The third protrusion P2 overlaps the second light emitting element 102 in the second direction Y, and the third protrusion P3 overlaps the second light emitting element 102 in the second direction Y. The first to third protrusions P1, P2, and P3 can overlap with the optical element 103 in the second direction Y. are arranged in the second direction with respect to the first to third light emitting elements 101, 102, and 103, respectively. The first to third light emitting elements 101, 102, and 103 are arranged to overlap each other, and the light emitting surfaces 111 For this purpose, the first to third protrusions P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, P11, P12, P13, P14, P15, P16, P17, P18, P19, P20, P21, P22, P23, P24, P25, P26, P27, P28, P29, P30, P31, P 2 and P3 are the light emitting surfaces 111 of the first to third light emitting elements 101, 102, and 103 and the second direction It can overlap in the Y direction.

[0063] The first to third protrusions P1, P2, and P3 overlap in the first direction, and the first and second recesses C The front of the protrusions P0 (P1, P2, P3) can be overlapped with the front of the protrusions P0 (P1, P2, P3) in the first direction. The area overlapping the light emitting element 105 (101, 102, 103) in the second direction is the recess C1. , C2, it can be adjacent to the apex of the convex portion P0.

[0064] The first recess C1 is formed in a region between the first and second light emitting elements 101 and 102 and in a second direction. The second recess C2 overlaps with the region between the second and third light emitting elements 102 and 103. The first and second recesses C1 and C2 may overlap in the second direction Y. The first and second recesses C1 and C2 can transmit or reflect light. The occurrence of dark areas in the areas between the three light emitting elements 101, 102, and 103 can be suppressed. can.

[0065] The substrate 210 includes a printed circuit board (PCB), for example, a resin System printed circuit boards, metal core PCBs, flexible PCBs, The substrate 210 may include a flex PCB, or an FR-4 substrate. The substrate 210 may be made of a flexible or inflexible material. The circuit pattern on the substrate 210 corresponds to the light emitting element 105. A given area may have multiple pads.

[0066] The rear region of the substrate 210 with respect to the light emitting element 105 as a reference is a region where light is emitted. A circuit pattern for connecting the light emitting elements 105 is disposed on the opposite side of the region where the light emitting elements 105 are disposed. The rear region is arranged depending on the number of the light emitting elements 105 or the connection of the light emitting elements 105. The width of the rear region is determined by the distance between the light emitting element 105 and the rear surface S2. The distance D3 between the light emitting element 105 and the rear light emitting element 105 is set to 2 mm or more. and forming a circuit pattern for connecting a plurality of light emitting elements 105. It is possible.

[0067] The light emitting elements 105 have bonding portions disposed at the bottom thereof, and the pads of the substrate 210 are The light emitting elements 105 are electrically connected to the circuit pattern of the substrate 210. In another example, the plurality of light emitting elements 105 are connected in series by a A group of 10 circuit patterns connected in parallel or two or more connected in series are connected in parallel.

[0068] The light emitting device 105 is a device having a light emitting chip or a LED chip packaged in a package. The light emitting chip can include a package that emits blue, red, green, and ultraviolet (U) light. The light emitting element 105 can emit at least one of white, blue, red, and V. The light emitting element 105 can emit at least one of green and blue. The light emitting element 105 emits light and its bottom is disposed on the substrate 210. As another example, the light emitting device 10 may be a side view type package. 5 may be an LED chip, one side of the LED chip is open and the other side is a reflector. The material is placed.

[0069] The light emitting surface 111 of the light emitting element 105 is adjacent to the substrate 210, for example, the substrate The light emitting surface 111 is disposed on a side surface adjacent to the top surface of the light emitting element 105. The light emitting element is disposed on a side surface between the bottom surface and the top surface, and emits light in the second direction Y. The exit surface 111 of the element 105 is adjacent to the first reflective layer 230 and is in contact with the top surface of the substrate 210. The surface may be perpendicular to the top surface of the first reflective layer 230.

[0070] The thickness of the light emitting device 105 may be smaller than the length of the light emitting device 105 in the first direction X. The thickness of the light emitting element 105 may be 3 mm or less, for example, 2 mm or less. The thickness of 105 may be in the range of 1 mm to 2 mm, for example, in the range of 1.2 mm to 1.8 mm. It is possible.

[0071] The length of the light emitting element 105 in the first direction X may be greater than the thickness of the light emitting element 105. For example, it may be 1.5 times or more the thickness of the light emitting element 105. The element 105 has a small thickness and a long length in the first direction, so that the light emitting element 1 It is possible to provide a wide light output angle in the first direction X, which is the left and right direction based on the center of the optical fiber 05. Here, the light emission angle of the light emitting element 105 in the first direction X is 1 / 3 the vertical direction. The light output angle of the light emitting element 105 in the first direction is 110 degrees to 1 The length of the light emitting element 105 in the first direction X may be in the range of 60 degrees. It is larger than the width of the optical element 105 in the second direction.

[0072] Here, as shown in FIG. 2, the thickness Za of the substrate 210 is larger than the thickness of the light emitting element 105. The thickness of the light emitting element 105 is at least twice the thickness Za of the substrate 210. The thickness Z of the substrate 210 may be in the range of, for example, 2 to 4 times. Since the thickness of the light source 200 is thin, the light source 200 can be provided as a flexible plate. can be.

[0073] As shown in FIGS. 2 to 4, the resin layer 220 is disposed on the substrate 210. The reflective layer 230 is disposed between the resin layer 220 and the substrate 210. The resin layer 220 can cover the light emitting element 105. The resin layer 220 may contact the top and side surfaces of the first reflective layer 230. A portion of the resin layer 220 may be in contact with the upper surface of the first reflective layer 230. The resin layer 220 can be in contact with the substrate 210 by forming a resin layer 220 on the light emitting element 105. The resin layer 220 can contact the light emitting surface 111 of the resin layer 220. The side surface S3 and the second side surface S4 are the side surfaces between the first and second reflective layers 230 and 240. The front surface S1, the rear surface S2, the first side surface S3, and the second side surface S4 are arranged around the light emitting element 105. It may be a surface facing the light emitting element 105 or a surface corresponding to the side surface of the light emitting element 105 .

[0074] The upper surface area of ​​the resin layer 220 may be the same as the upper surface area of ​​the substrate 210. The upper surface area of ​​the resin layer 220 may be the same as the upper surface area of ​​the first reflective layer 230 . The upper surface area of ​​the resin layer 220 may be the same as the upper surface area of ​​the second reflective layer 240. The length X1 of the resin layer 220 in the first direction may be the same as the length of the substrate 210. In the first direction, the length X1 of the resin layer 220 is the same as the length of the first reflective layer 230. The length X1 of the resin layer 220 in the first direction may be The maximum width Y1 of the resin layer 220 in the second direction may be equal to the length of the substrate 2. In the second direction, the maximum width Y1 of the resin layer 220 may be equal to the maximum width of the front The maximum width of the resin layer 220 in the second direction may be the same as the maximum width of the first reflective layer 230. The width Y1 may be the same as the maximum width of the second reflective layer 240. The minimum width of the adhesive layer 220 may be the same as the minimum width of the substrate 210. The minimum width of the resin layer 220 may be the same as the minimum width of the first reflective layer 230. In the direction, the minimum width of the resin layer 220 may be the same as the minimum width of the second reflective layer 240. The maximum width in the second direction is the distance between the apexes of the protrusions P1, P2, and P3 of the lighting module and the rear surface S2 The minimum width is the length between the bottom of the recesses C1 and C2 of the lighting module and the rear surface S2. It is the length of time.

[0075] The resin layer 220 is disposed between the first and second reflective layers 230 and 240. The second reflective layers 230 and 240 have the same area and are aligned with each other on the upper and lower surfaces of the resin layer 220. This allows the resin layer 220 to be oriented in a direction opposite to the light emitting element 105. The light reflected by the first and second reflective layers 230 and 240 is diffused and guided laterally. It is possible.

[0076] The resin layer 220 is formed to a thickness Zb that is thicker than the thickness of the light emitting element 105. Therefore, the resin layer 220 protects the upper part of the light emitting element 105 and prevents moisture from penetrating. The light emitting element 105 has a substrate 210 disposed at the bottom and a resin layer 212 disposed at the top. 220 is arranged, the light emitting element 105 can be protected. The distance between the upper surface of the oil layer 220 and the light emitting element 105 is 0.6 mm or less, for example, 0.5 mm to 0. The upper part of the resin layer 220 is arranged to have the same thickness as the interval. , the upper part of the light emitting element 105 can be protected.

[0077] The thickness Zb of the resin layer 220 is the distance between the upper and lower surfaces of the resin layer 220. The thickness Zb of the resin layer 220 is the distance between the first and second reflective layers 230 and 240. The thickness Zb can be determined by the distance between the first and second reflective layers 230 and 240 (for example, The thickness Zb may be equal to the distance between the front surface S1 and the rear surface S2. For example, the distance between the front surface S1 and the rear surface S2 may be smaller than the maximum width or The maximum width is the distance between the apex of the convex portions P1, P2, and P3 and the rear surface S The first and second sides S3, S2 of the resin layer 220 may have a linear distance between them. 4 is the distance between the apex of the convex portions P1, P2, P3 and the rear surface S2. The minimum width is the linear distance between the bottom of the recesses C1 and C2 and the rear surface S2. The distance or spacing between the first reflective layer 230 and the second reflective layer 240 can be , may be smaller than the distance or interval between the front surface S1 and the rear surface S2 of the resin layer 220. The distance between the first and second reflective layers 230 and 240 is set to the second direction of the lighting module 200. By arranging the width Y1 or smaller than the minimum width, a line-shaped surface light source is provided, and the luminous intensity is This improves the lighting and prevents hot spots. It is provided with flexible properties that allow it to protrude or recess.

[0078] The thickness Zb of the resin layer 220 may be equal to or less than twice the thickness of the light emitting element 105. The thickness Zb of the resin layer 220 may be, for example, 1 to 2 times the thickness of the resin layer 220. The thickness of the resin may be in the range of 5 mm to 1.9 mm or in the range of 1.6 mm to 1.8 mm. The thickness Zb of the layer 220 may be 0.8 times or less than the thickness Z1 of the lighting module 200. For example, the thickness Z1 of the lighting module 200 may be in the range of 0.4 to 0.8 times. The resin layer 220 may have a thickness Z1 of the lighting module 200 of 1.2 mm or less. Since the light sources are arranged with a difference of 1 / 2, the reduction in light efficiency in the lighting module 200 can be prevented. It can strengthen the sible properties.

[0079] The resin layer 220 may be made of silicone, silicone molding compound (SMC), or epoxy. May contain resinous materials such as epoxy or epoxy molding compound (EMC) The resin layer 220 can be made of a UV (ultraviolet) curable resin or a thermosetting resin material. For example, PC, OPS, PMMA, PVC, etc. may be selectively included. For example, the main material of the resin layer 220 is a urethane acrylate oligomer. For example, a synthetic oligomer such as urethane acrylate can be used. It is possible to use a mixture of a cellulose oligomer with a polyacrylic polymer type. Of course, IBOA (isobornyl acrylate), a low-boiling point dilution type reactive monomer, A mixture of HPA (Hydroxylpropyl acrylate, 2-HEA2-hydroxyethyl acrylate) etc. The polymer may further contain a photoinitiator (e.g., 1-hydroxycyclohexyl phe- nyl-ketone, etc.) or antioxidants, etc. may be mixed.

[0080] The resin layer 220 may include beads (not shown). The resin layer 220 can diffuse and reflect incident light, thereby increasing the amount of light. The phosphor may include a yellow phosphor, a green phosphor, a blue phosphor, a red phosphor, or a It may contain at least one phosphor.

[0081] In the resin layer 220, the regions where the convex portions P1, P2, and P3 are formed are lens portions. The lens portion of the resin layer 220 is provided in a lens shape having a convex curved surface. The lens portion is formed in a semi-spherical shape when viewed from the top. The closer to the center of the light emitting element 105, the farther the distance from the light emitting element 105. The thickness of the lens portion in the third direction may be the thickness Zb of the resin layer 220. The lens part has flat upper and lower surfaces and is curved in the front surface S1 direction. The lens portion can diffuse the light incident in the direction of the front surface S1. The first and second reflective layers 230 and 240 are arranged between the first and second reflective layers 230 and 240, respectively, and refract light to the front surface S1. The lens portion can emit light in a region deviated from the optical axis. The light incident on the surface can be refracted at an exit angle greater than the incident angle.

[0082] In the resin layer 220, the recesses C1, C2, and C3 are arranged between the protrusions P1, P2, and P3. 2 is provided as a recess recessed in the direction of the rear surface S2, and the recess The recess of the resin layer 220 may include a curved surface or a curved surface having an inflection point. It is formed as a curved surface recessed from the surface of the resin layer 220 and can refract incident light. The recesses C1 and C2 are formed in the regions between the lens portions so as to prevent the light emitting element 105 from being exposed. It can refract the emitted light and suppress the occurrence of dark areas.

[0083] Here, the convex portions P1, P2, and P3 and the concave portions C1 and C2 are arranged on the resin layer 220. In this case, the substrate 210 and the first and second reflective layers 230 and 240 are The convex portions P1, P2, P3 or lens portions of the resin layer 220 are formed in the corresponding shapes. , may be the same as the number of the light emitting elements 105.

[0084] The first reflective layer 230 can reflect light emitted from the light emitting device 105. The first reflective layer 230 is formed on the upper surface of the substrate 210. 30 may be formed as an upper layer of the substrate 210 or as a separate layer. The first reflective layer 230 is attached to the upper surface of the substrate 210 with an adhesive. The resin layer 220 is adhered to the upper surface of the substrate.

[0085] The first reflective layer 230 has a plurality of holes 232 in an area corresponding to the bottom surface of the light emitting element 105. The light emitting device 105 is connected to the substrate 210 through the hole 232. A portion of the resin layer 220 can contact the substrate 210 through the hole 232 . The hole 232 is the area where the light emitting element 105 is bonded to the substrate 210. That's fine.

[0086] The first reflective layer 230 may be formed as a single layer or a multi-layer structure. The first reflective layer may include a material that reflects light, such as a metal or a non-metal material. When 230 is a metal, it includes a metal layer such as stainless steel, aluminum (Al), or silver (Ag). If it is a non-metallic material, it can include white resin material or plastic material. The first reflective layer 230 may include a white resin material or a polyester (PET) material. The first reflective layer 230 may be a low-reflection film, a high-reflection film, a diffused-reflection film, or The first reflective layer 230 may include at least one of a specular reflective film, for example. For example, it is provided with a specular reflection film for reflecting incident light to the front surface S1.

[0087] The thickness Zc of the first reflective layer 230 may be smaller than the thickness Za of the substrate 210 . The thickness Zc of the first reflective layer 230 is 0.5 times or more the thickness Za of the substrate 210. Therefore, the transmission loss of the incident light can be reduced. The thickness may be in the range of 0.2 mm to 0.4 mm, and if it is smaller than this range, light transmission loss occurs. If the thickness is greater than the above range, the thickness Z1 of the lighting module 200 may increase. This becomes the case.

[0088] The second reflective layer 240 is disposed on the resin layer 220. The second reflective layer 240 The second reflective layer 240 is adhered to the upper surface of the resin layer 220. The light source is disposed over the entire upper surface of the device, thereby reducing light loss.

[0089] The second reflective layer 240 may be made of the same material as the first reflective layer 230. The reflective layer 240 is made of the same material as the first reflective layer 230 to reflect light and reduce light transmission loss. The second reflective layer 2 may be made of a material with higher light reflectivity or may have a larger thickness. 40 may have the same or a greater thickness than the first reflective layer 230. The first and second reflective layers 230 and 240 are made of the same material and have the same thickness.

[0090] The thickness Zd of the second reflective layer 240 may be smaller than the thickness Za of the substrate 210 . The thickness Zd of the second reflective layer 240 is 0.5 times or more the thickness Za of the substrate 210. Therefore, the transmission loss of the incident light can be reduced. The thickness may be in the range of 0.2 mm to 0.4 mm, and if it is smaller than this range, light transmission loss occurs. If the thickness is greater than the above range, the thickness Z1 of the lighting module 200 may increase. This becomes the case.

[0091] The second reflective layer 240 may be formed as a single layer or a multi-layer structure. The second reflective layer may include a material that reflects light, such as a metal or a non-metal material. When 240 is a metal, it includes a metal layer such as stainless steel, aluminum (Al), or silver (Ag). If it is a non-metallic material, it can include white resin material or plastic material. The second reflective layer 240 may include a white resin material or a polyester (PET) material. The second reflective layer 240 may be a low-reflection film, a high-reflection film, a diffused-reflection film, or The second reflective layer 240 may include at least one of a specular reflective film, for example. For example, a specular reflection film is provided so that incident light travels in the direction of the front surface S1.

[0092] The substrate 210, the first reflective layer 230, the resin layer 220, and the second reflective layer 240 The laminated structure may include the protrusions P1, P2, and P3 and the recesses C1 and C2. The convex portions P1, P2, and P3 have flat upper and lower surfaces and curved or hemispherical surfaces in the first direction. The recesses C1 and C2 may include a curved surface recessed toward the rear surface S2. This can be done.

[0093] The protruding and recessed curved surfaces of the resin layer 220 become haze surfaces. The haze surface is formed by treating the resin layer 220 in such a manner that the haze surface can diffuse light. The surface can be treated to give it a rougher surface, which can diffuse the light that is emitted.

[0094] The lighting module 200 according to the embodiment of the invention provides a thickness Z1 in the third direction in the form of a line. In this way, it is possible to provide a flexible, linear surface light source. The thickness Z1 of the lighting module 200 may be 3 mm or less. In another example, the lighting module may be provided as a linear surface light source having a length of 3 mm or less. 200 is arranged to be 3 mm or more and 6 mm or less, in this case, the thickness of the lighting module 200 increases However, by providing a thicker resin layer 220, the line width is increased and the light distribution area is increased. It can be done.

[0095] Referring to FIG. 2, the thickness of each component in the lighting module 200 is as follows: The thickness of the substrate 210 is Za, the thickness of the resin layer 220 is Zb, and the thickness of the first reflective layer 230 is When the thickness is Zc and the thickness of the second reflective layer 240 is Zd, Zb>Za>Zd≧Zc The relationship between the lower surface of the substrate 210 and the upper surface of the second reflective layer 240 may be: The distance between the light source 200 and the light source 201 is the thickness Z1 of the lighting module 200. The thickness Zb is 0.4 to 0. The ratio of thickness Za to Z1 is 0.14 to 0.18, and the ratio of thickness Zd Alternatively, Zc may have a ratio of 0.08 to 0.12. Zb is 3.5 times that of Za. The Zb can have a ratio of Zc or Zd of 5.8 to 6.4. The thickness Zb of the resin layer 220 can be set to be greater than the thickness Za of the substrate 210. The light emitting element 105 can be protected and the light can be diffused and guided. It can strengthen bull characteristics.

[0096] Referring to FIG. 4, the maximum width W1 of the protrusions P1, P2, and P3 in the first direction is The distance between the recesses C1 and C2 is equal to or greater than the pitch G1 of the light emitting element 105. The maximum width W1 of the protrusions P1, P2, and P3 may be smaller than the maximum width W1 of the protrusions P1, P2, and P3. If the peach size is larger than G1, two or more light emitting elements 10 are disposed in the regions of the protrusions P1, P2, and P3. 5 can be arranged to increase the luminous intensity. When the maximum width W1 of the light emitting element 105 is smaller than the pitch G1 between the light emitting elements 105, the protrusions P1, P2, The small size of P3 can provide a uniform distribution of light, but the luminous intensity may be reduced. This becomes the case.

[0097] The maximum width W1 of the protrusions P1, P2, and P3 is 15 mm or more, for example, in the range of 15 mm to 20 mm. The maximum width W1 of the protrusions P1, P2, and P3 can be The maximum width W of the protrusions P1, P2, and P3 and the depths C1 and C2 are larger than the depth D4. The ratio of the recess C1 to the depth D4 may be in the range of 1:0.4 to 1:0.7. If the depth of C2 is smaller than the above range, a dark area will appear between the adjacent convex portions P1, P2, and P3. When the depth of the recesses C1 and C2 is greater than the above range, the light emitting element The light travels to the area adjacent to the light emitting element 105, increasing the optical interference between the light emitting elements 105. The depth D4 of the recesses C1 and C2 is a distance from a straight line connecting the vertices of the protrusions P1, P2, and P3. The distance between the bottoms of the recesses C1 and C2 can be defined as a straight-line distance.

[0098] The curved surfaces of the convex portions P1, P2, and P3 and the curved surfaces of the concave portions C1 and C2 may have a curvature. The curvature radius of the convex portions P1, P2, and P3 is 8 mm or more, for example, in the range of 8 mm to 14 mm. The curvature radii of the convex portions P1, P2, and P3 may be in the range of 9 mm to 11 mm. If the value is smaller than the range, the improvement in luminosity will be minimal, and if the value is larger than the range, the dark area will occur.

[0099] The radius of curvature of the recessed portions C1 and C2 is 1 / 8 times the radius of curvature of the protruding portions P1, P2, and P3. The radii of curvature of the recesses C1 and C2 and the radii of curvature of the protrusions P1, P2, and P3 may be small. The ratio of the curvature radii of the recesses C1 and C2 may be in the range of 1:8 to 1:28. If the diameter is smaller than the above range, the amount of light emitted through the recesses C1 and C2 decreases, resulting in a dark area. When the amount of the increase is larger than the above range, the size of the protrusions P1, P2, and P3 becomes smaller. There is a risk that optical interference occurs between the light emitting elements 105. The depth D4 and the radius of curvature of C1 and C2 depend on the position of the light emitting element 105 and the position of the light emitting element 10 5, the light passing through the convex portions P1, P2, P3 and the concave portions C1, C2 is It has scope for improving uniformity and suppressing dark areas in the recesses C1 and C2. The curvature radius of the recesses C1 and C2 may be in the range of 0.5 to 1 mm. The recesses C1 and C2 have a predetermined curvature and are provided in a curved shape, so that the incident light is refracted. This allows light to pass through the recesses C1 and C2, thereby reducing the occurrence of dark areas in the recesses C1 and C2. It is possible.

[0100] The areas between the apexes of the convex portions P1, P2, and P3 and the light emitting element 105 diffuse light. The area for emitting light with a uniform distribution can be defined as a light diffusion area or a light guide area. The distance between the apex of each of the convex portions P1, P2, and P3 and the light emitting element 105 is 13 mm or more. The protrusions P1, P2, and P3 may have a diameter in the range of, for example, 13 mm to 20 mm. When the distance between the apex of the light emitting element 105 and the light emitting element 105 is within the above range, uniform distribution can be achieved through light diffusion. The distance between the protrusions P1, P2, P3 and the light emitting element 105 is less than the above range. If it is smaller than this range, hot spots may occur, and if it is larger than this range, the luminous intensity may become too low. The protrusions P1, P2, and P3 and the emitting portion P4 are connected to each other, and the size of the module is increased. The spacing between the optical elements 105 may be greater than the radius of curvature of the convex portions P1, P2, and P3. For example, 1.3 times or more or 1.3 to 2.0 times the curvature radius of the convex portions P1, P2, and P3. The range may be:

[0101] The recesses C1 and C2 are such that the distance D1 between the straight lines connecting the light emitting elements 105 is The distance D1 may be smaller than the depth D4 of C1 and C2. If the distance D1 is smaller than the depth D of the recesses C1 and C2, the distance D may be in the range of 2 mm. 4 becomes deeper, and the distance D2 between the light emitting element 105 and the protrusions P1, P2, and P3 becomes narrower. The occurrence of dark areas in the recessed portions C1 and C2 or hot spots in the protruding portions P1, P2, and P3 This will occur.

[0102] Referring to FIG. 5, light L1 emitted from the light emitting element 105 travels in the optical axis direction. is transmitted through the centers of the convex portions P1, P2, and P3, and the light L emitted around the optical axis 2 emits light at an exit angle greater than the incident angle, allowing the light to be diffused. 1, Light L3 incident on C2 is refracted and transmitted or reflected by the convex portions P1, P2, and P3. The light is then emitted in a darkened state, thereby reducing the occurrence of dark areas in the recesses C1 and C2. As shown in FIG. 37, the lighting module according to the embodiment of the invention has an emitted luminous intensity as shown in (a). In the distribution, the dark region Rb appears smaller than the bright region Ra, and the iso-luminosity curves are as shown in (b). FIG. 38 shows a lighting module according to an embodiment of the invention, in which a convex portion It is provided as a module as shown in Figure 15, with a structure that has a flat front surface without any recesses. In the luminosity distribution, the dark region Rb becomes larger than the bright region Ra, as shown in (b). It has an iso-luminosity curve distribution.

[0103] Referring to FIG. 6, the line passing through the center of the light emitting element 105 and the center of the protrusion P0 is used as a reference. The angle R0 between the center of the light emitting element 105 and the bottom of the recess C0 is 50 degrees or more, for example For example, the recess C0 may have an angle R in the range of 50 degrees to 80 degrees. 0, the light incident from the light emitting element 105 is refracted and emitted to the outside. The convex portion P0 and the concave portion C0 can be the convex portions P1, P2, and P3 shown in FIGS. 3 and recesses C1, C2.

[0104] FIG. 7 is an exploded perspective view of a lighting module according to an embodiment of the present invention, and FIGS. 8 to 13 are views of the lighting module according to an embodiment of the present invention. 1 is a diagram illustrating a manufacturing process of a lighting module according to an embodiment. In this regard, for the same parts as those in the configuration described above, reference will be made to the above description.

[0105] 7 and 8, two or more light emitting elements 105 are arranged on a substrate 210 in a first direction. The light emitting elements 105 disposed on the substrate 210 are arranged in a front or front-facing direction. As another example, the light emitting element 105 may be disposed on the substrate 210. However, they may be arranged in two rows, and the present invention is not limited to this.

[0106] Referring to FIGS. 7 and 9, a first reflective layer 230 is formed on the substrate 210. The first reflective layer 230 has holes 2 into which the light emitting devices 105 are inserted. The first reflective layer 230 is disposed around the light emitting element 105 and The light emitting element 105 is attached to the substrate 210 and can reflect the light emitted from the light emitting element 105. The first reflective layer 230 is formed by disposing a reflective resist material on the substrate 210. In this case, the first reflective layer 230 may not be formed, and is not limited thereto. The thickness of the light emitting element 105 is thinner than that of the light emitting element 105, and the light emitting element 105 is disposed below the light emitting surface. The first reflective layer 230 may be made of a plastic material, a metal material, or a non-metal material. That's fine.

[0107] Referring to FIGS. 7 and 10, a resin layer 220 is formed on the first reflective layer 230. The resin layer 220 is molded on the first reflective layer 230 and the light emitting element 105. The resin layer 220 is formed to a thickness that can cover the light emitting element 105. The resin layer 220 is made of a transparent resin material, such as silicone or silicone molybdenum. Molding Compound, Epoxy or Epoxy Molding Compound, UV It may be made of a material such as a hardening resin or a thermosetting resin.

[0108] The resin layer 220 is provided to a thickness greater than that of the light emitting element 105. The resin layer 220 is disposed at a thickness equal to or less than two times, for example, equal to or less than 1.5 times, the thickness of the substrate 105. It may be formed by a fencing process.

[0109] 7 and 11, the resin layer 220 is not cured before the resin layer 220 is hardened. The second reflective layer 240 is formed on the upper surface of the resin layer 220. The second reflective layer 240 can cover the entire surface of the resin layer 220. After curing, it can be attached using an adhesive.

[0110] 7 and 12, after the second reflective layer 240 is formed, the substrate 210 1, 12 and 13, the structure from the first reflective layer 240 to the second reflective layer 240 is cut using a cutting device. 13. Here, the cutting equipment is The cutting can be performed by a router, and the protrusion P of the lighting module can be cut by the cutting. 0 and recess P0 are formed.

[0111] As a result, the lighting module has a front surface S1 of the resin layer 220 and a substrate 21 The front surface S1 of the resin layer 220 is disposed on the same vertical plane as the front surface S1. The first reflective layer 230 and the second reflective layer 240 are disposed on the same vertical plane. The rear surface S2, the first side surface S3 and the second side surface S4 of the substrate 220 are the same as those of the rear surface S2 of the substrate 210. The first and second side surfaces are disposed on the same vertical plane as the resin layer 220. The surface S2, the first side surface S3 and the second side surface S4 are formed by the first and second reflective layers 230, The rear surface of 240 is disposed on the same vertical plane as the first and second sides.

[0112] 7, 12 and 13, the lighting module The light emitted from the element 105 is emitted through the front surface S1 of the resin layer 220. A portion of the light reflected internally is emitted to the rear surface S2, the first side surface S3, and the second side surface S4 of the layer 220. It is served.

[0113] 14 is another example of a lighting module of the invention. As shown in FIG. 14, the first reflective layer 230 The resin layer 220 is spaced from the edge of the substrate 210, and a portion 222 of the resin layer 220 is located on the substrate 210. The resin layer 220 can contact the upper surface of the edge side of the substrate 210. When it comes into contact with the edge, it can suppress the penetration of moisture.

[0114] As another example, in the lighting module shown in FIGS. 2 and 14, A third reflective layer 245 is further disposed on the surfaces (S2, S3, S4) of the side surfaces excluding the front surface S1. The third reflective layer 245 prevents light leakage and increases the amount of light extracted from the front surface S1. The third reflective layer 245 can be formed by the first and second reflective layers 23 disclosed above. The third reflective layer 245 may be formed on the side surface of the resin layer 220. They can be in contact or separated.

[0115] In the following description, a lighting module having a stacked structure as shown in FIGS. 3 and 7 will be described. The above disclosed configuration was modified to account for the variable luminous intensity falloff in Joules. In the following explanation, we will focus on the changed parts of each configuration. The described configurations can be selectively applied.

[0116] FIG. 15 shows the lighting module disclosed above, which has a flat front surface S1 without any protrusions or recesses. This lighting module is stacked in the structure shown in FIG. 7. The luminous intensity of such a lighting module is low in the horizontal and vertical directions, and there are no protrusions or recesses. As a result, the dark areas are larger than the light areas as shown in Figure 38. In this case, Diffusion agents can be added to prevent hot spots and provide longer light transmission distances. .

[0117] 16 to 19 show lighting modules according to embodiments of the present invention in which the curvature of the convex portion is changed. The lighting module 201a in FIG. 16 has a light emitting element 105 and a corresponding protrusion Pa1. The radius of curvature is 5±0.5 mm, and in this case the luminous intensity in the horizontal and vertical directions is 7.5 cd or more. In this case, the area Pb2 between the protrusions Pa1 and Pa1 is a flat surface facing each other. However, there is a limit to the improvement in brightness.

[0118] 17 to 19 show the light emitting element 105 in the lighting module 201b of the present invention. The curvature radius of the protrusions Pb1, Pc1, and Pd1 is gradually increased. The radius of curvature of the protrusion Pc1 is in the range of 8 mm to 11 mm, and FIG. 18 shows the radius of curvature of the protrusion Pc2 is in the range of 11 mm to 14 mm. In FIG. 19, the curvature radius of the convex portion Pd1 is in the range of 15 mm to 21 mm. In the structure shown in Figures 17 and 18, the luminous intensity in the horizontal and vertical directions is 8.5c d or more, and in Figure 19, the luminous intensity in the horizontal and vertical directions is 7.5cd or more and 8. Therefore, the illumination of the lighting module of the present invention is 7.5 cd or more. When providing the light intensity, the above curvature radius can be selectively applied to provide the highest light intensity. In this case, the curvature radii of the convex portions Pb1, Pc1, and Pd1 are set in the range of 8 mm to 14 mm. At this time, the curvature radii of the convex portions Pb1, Pc1, and Pd1 are In the area between c1 and Pd1, recesses Pb2, Pc2, and Pd2 are provided without curves or 0. The convex portion Pb1 of such a lighting module may have a curvature radius of 5 mm to 1 mm. Pc1, Pd1 and recesses Pb2, Pc2, Pd2 are alternately arranged, and the protrusions P are The concave portions Pb2 and Pb3 are formed by diffusing and extracting the incident light overlapping with the element 105 in the second direction. c2, Pd2 refract the incident light and improve the luminous intensity of the line-shaped surface light source. This allows hot spots to be prevented. The distance between the lighting module and the inner lens is 13 mm. The measurement was performed under the condition that the air gap between the lens was 11 mm.

[0119] 20 to 34 show examples of lighting modules according to the present invention in which the shape of the front surface S1 is modified. In such a modification, when the convex and concave portions disclosed above have curvature, the horizontal and vertical It may have a lower luminous intensity than the luminous intensity in the perpendicular direction.

[0120] As shown in FIG. 20, the front surface S1 of the lighting module 202a has a protrusion Pa3 and a recess Pa4. The protrusions Pa3 are arranged so as to overlap the light emitting elements 105, and the protrusions The recessed portions Pa4 are arranged between the protruding portions Pa3 so as to have a predetermined curvature. The light emitting element 105 is provided with a recess having a curved surface that is recessed to correspond to the center of the light emitting element 105. It is served.

[0121] As shown in FIG. 21, the front surface S1 of the lighting module 202b has a protrusion Pb3 and a recess Pb4. The protrusions Pb3 are arranged so as to overlap the light emitting elements 105, and the protrusions Pb4 are arranged so as to overlap the light emitting elements 105. The recesses Pb4 are provided between the protrusions Pb3 with flat surfaces. The light emitting element 105 is provided with a recess having a curved surface that is recessed to correspond to the center of the light emitting element 105. The flat surface (or bottom point) of the recess Pb4 is disposed in the region between the light emitting elements 105. will be done.

[0122] As shown in FIG. 22, the front surface S1 of the lighting module 202c has a protrusion Pc3 and a recess Pc4. The maximum width of the protrusions Pc3 is greater than the length of the light emitting element 105 in the first direction. Therefore, two or more protrusions Pc3 that overlap the light emitting elements 105 are arranged. The recessed portions Pc4 are arranged between the protruding portions Pc3, and the recessed portions Pc4 have a negative curvature. The protrusion Pc3 is disposed on a curved surface having a certain ratio, or a structure having an inflection point or an interface. In this case, the size of the protrusion Pc3 is smaller than that of the light emitting element 105. Since it is arranged as a microlens, it can provide a uniform distribution of light but the luminous intensity is reduced. will occur.

[0123] 23 to 25, the front surface S1 of the lighting module 202d has protrusions Pd3, Pe3, and Pf 3 and recesses Pd4, Pe4, Pf4 are alternately arranged, and the protrusions Pd3, Pe3, Pf3 are , protruding from the bottom of the recesses Pd4, Pe4, Pf4 in a triangular shape, for example, a right-angled triangle shape. The bottoms of the recesses Pd4, Pe4, and Pf4 are located at the light emitting surface of the light emitting element 105. The protrusions Pd3, Pe3, and Pf3 correspond to the outer edge portions. The recesses Pd4, Pe4, Pf can be provided with an inclined surface between the light emitting elements 105. The portion corresponding to the bottom point of the projection Pd 4 is provided by a plane perpendicular to the bottom point. the inclined surface of the protrusion Pd3 is a flat surface, and the apex of the protrusion Pd3 is an angular surface, FIG. 24 shows that the apex of the convex portion Pe3 has a curved surface, and FIG. 25 shows that the apex of the convex portion Pf3 has an inclined surface. 23 to 25, the convex portion Pd3, Since light is transmitted along the inclined directions of Pe3 and Pf3, the light is The distribution of the iso-luminosity curves is formed long in the inclined direction.

[0124] 26 to 28 show other examples of lighting modules.

[0125] Referring to FIG. 26, the lighting module 202g has a protrusion Pg3 and a recess Pg4 on the front surface S1. are alternately arranged, and the protrusion Pg3 has a curved surface that protrudes and overlaps with the light emitting element 105, The bottom of the recess Pg4 is located between the light emitting elements 105. In this structure, a wide distribution of iso-luminosity curves can be provided.

[0126] Referring to FIG. 27, the lighting module 202h has a protrusion Ph3 and a recess Ph4 on the front surface S1. The recesses Ph4 have polygonal shapes and correspond to the light emitting elements 105. The protrusions Ph3 are arranged so as to protrude into the regions between the light emitting elements 105. In such a structure, a wide distribution of iso-luminosity curves can be provided.

[0127] Referring to FIG. 28, the lighting module 202i has a protrusion Pi3 and a recess Pi4 on the front surface S1. are alternately arranged, the convex portions Pi3 correspond to the light emitting elements 105, and the concave portions Pi3 correspond to the light emitting elements 105. , can correspond to the area between the light emitting elements 105. i4 has a curved surface and is provided in a sinusoidal shape. In such a structure, the iso-luminosity curve A wide distribution of lines can be provided.

[0128] Referring to FIG. 29, the lighting module 202j has a protrusion Pj3 and a recess Pj4 on the front surface S1. are alternately arranged, the protrusions Pj3 have convex curved surfaces, and the recesses Pj4 have concave curved surfaces. The width and radius of curvature of such a recess Pj4 may be smaller than that of one or more of the light-emitting elements. 105, and is provided in the form of a concave microlens. It can provide a wide distribution.

[0129] Referring to FIG. 30, the lighting module 202k has a protrusion Pk3 and a recess Pk4 on the front surface S1. are alternately arranged, and the protrusion Pk3 is provided with a flat surface, and faces the light emitting element 105. Accordingly, the recess Pk4 has a trapezoidal shape corresponding to the area between the light emitting elements 105. The recess Pk4 has a width that gradually decreases as it becomes deeper. The surfaces are provided with inclined surfaces, so that incident light can be refracted.

[0130] Referring to FIG. 31, a lighting module 202l is provided that is different from the structure of FIG. The lighting module 202l has a structure in which the depth of the recesses P14 between the protrusions P13 is deeper. The bottom of the recess P14 is positioned deeper than the rear surface of the light emitting element 105. In this case, a part of the light traveling backward from the light emitting element 105 is refracted and extracted to the front surface S1. It is possible.

[0131] In FIGS. 32 to 34, the lighting modules 202m, 202n, and 202o are triangular. The convex portions Pm3, Pn3, and Po3 and the concave portions Pm4, Pn4, and Po4 are arranged, and FIG. Pm4 is located between the light emitting elements 105, and the apex of the protrusion Pm3 is The apex of the protrusion Pn4 in FIG. 32 is formed into an angular surface corresponding to the center. The curved surface is formed to correspond to the center of the light emitting element 105, and in FIG. 34, the bottom point of the recess Po4 is It is arranged to correspond to the center of the optical element 105 and may be an angular or curved surface. The vertex of the protrusion Po3 corresponds to the region between the light emitting elements 105, and is an angular or curved surface. In the structures shown in Figures 32 and 34, the iso-luminosity curve distribution is wide, and In this case, the luminosity is improved.

[0132] 35 and 36 show the light emitting element 105 and the apex of the convex portion in the lighting module of the invention. In this case, the distances D11 and D12 between the convex portion P0 and the concave portion P1 are different from those in FIG. The portion C0 may have the curvature of FIG.

[0133] In the lighting module 203 of FIG. 35, the distance D11 between the light emitting element 105 and the apex of the protrusion P0 is 36 shows the case where the distance D between the light emitting element 105 and the apex of the protrusion P0 is 4 to 6 mm. 12 is in the range of 13mm to 21mm, and the luminous intensity in the horizontal and vertical directions is higher than that of the structure in FIG. In the structure of Figure 35, the light guide distance is short, so Hot spots may occur.

[0134] In addition, in the embodiment of the present invention, when the thickness of the resin layer 220 is provided to be thick, for example, 3 mm to 6 mm. In this case, the thickness of the resin layer 220 is increased, so that the light emitting area is increased and the light distribution is improved. do.

[0135] The lighting module according to the embodiment of the invention can be applied to a lamp as shown in FIG. Examples of the lamps include headlights, width lamps, side mirror lamps, front and rear lamps, and rear lamps. fog lamps, tail lamps, brake lights, daytime running lights, vehicle interior lighting, door scarves Scarf), rear combination lamps or backup lamps.

[0136] Referring to FIG. 39, the lamp is housed in a housing having an inner lens 502. The lighting module 200 disclosed above is coupled inside the housing 503. The thickness of the motor 200 is such that it can be inserted into the inner width of the housing 503. The width Z3 of the light exit portion 515 of the inner lens 502 is the same as the thickness of the lighting module 200. The difference may be equal to or less than two times the normal value, so that a decrease in luminous intensity can be prevented.

[0137] The inner lens 502 is positioned at a predetermined distance from the front surface of the lighting module 200, e.g. The outer lens 501 is spaced apart from the inner lens 502 by 10 mm or more. The lamp having such a lighting module 200 is an example, and other lamps may be used. The hose may be applied in a flexible structure, e.g., a curved or contoured structure when viewed from the side. stomach.

[0138] FIG. 40 is a plan view showing an example of a light emitting device applied to a lighting module according to an embodiment of the invention. 41 is an example of a module in which the light emitting element of FIG. 40 is arranged on a circuit board; 42 is a view of the module from the other side of FIG.

[0139] Referring to FIG. 40, the light emitting device 100 includes a body 10 having a cavity 20, a plurality of lead frames 30, 40 in the cavity 20; 40. The light emitting device 100 is an example of the light emitting device disclosed in the above embodiment, and is a side light emitting type package. It is embodied as a cage.

[0140] The light emitting device 100 has a length in the first direction that is three times or more, for example, four times or more, the width in the second direction. The length in the first direction may be 2.5 mm or more, for example, in the range of 2.7 mm to 4.5 mm. The light emitting device 100 can have a long length in the first direction. The number of the light emitting devices 100 can be reduced in the first direction. The thickness of the lighting module having the light emitting device 100 can be relatively thin. The thickness of the light emitting device 100 may be 2 mm or less. The body 10 has a cavity 20, and the length in the first direction is 3 times shorter than the thickness T1 of the body 10. The angle may be equal to or greater than 100 times, thereby widening the directivity angle of light in the first direction.

[0141] The lead frames 30 and 40 are disposed at the bottom of the cavity 20 of the body 10. The main body 10 is connected to, for example, a first lead frame 30 and a second lead frame 40. are combined.

[0142] The body 10 may be made of an insulating material. The body 10 may be made of a reflective material. The body 10 has a reflectance higher than a transmittance for the wavelength emitted from the light emitting chip. The main body 10 may be made of a material having a low reflectivity, for example, a material having a reflectivity of 70% or more. If the reflectance is 70% or more, it can be defined as a non-transparent material or a reflective material. The main body 10 is made of a resin-based insulating material, for example, a resin material such as PPA (Polyphthalamide). The body 10 may be made of a silicone-based, epoxy-based or plastic material. The light-transmitting layer 12 may be formed of a thermosetting resin containing a hard material or a material having high heat resistance and high light resistance. The main body 10 contains a white resin. The main body 10 contains an acid anhydride, an antioxidant, a mold release agent, Selective addition of light reflecting materials, inorganic charging materials, curing catalysts, light stabilizers, lubricants, and titanium dioxide. The body 10 is made of epoxy resin, modified epoxy resin, silicone resin, modified silicone resin, etc. At least one resin selected from the group consisting of styrene resin, acrylic resin, and urethane resin For example, TGIC (triglycidylisocyanurate), hydrogenated bisphenol A Epoxy resin consisting of diglycidyl ether, hexahydro-indeoxyphthalic acid, 3-methyl- 4-methylhexahydrophthalic anhydride, 4-methylhexahydrophthalic anhydride, etc. The water is added to epoxy resin as a hardening accelerator, DBU (1,8-Diazabicyclo(5,4,0)undecene-7). Ethylene glycol, titanium dioxide pigment, and glass fiber were added as co-catalysts, and the mixture was heated. It is possible to use a solid epoxy resin composition that has been partially cured and brought to a B-stage. The body 10 may be made of a thermosetting resin, a diffusing agent, selected from the group consisting of pigments, fluorescent materials, reflective materials, light-shielding materials, light stabilizers, and lubricants At least one of them may be mixed appropriately.

[0143] The body 10 may include a reflective material, for example, a resin material to which metal oxide is added. The metal oxide includes at least one of TiO2, SiO2, and Al2O3. Such a body 10 can effectively reflect incident light. For example, the body 10 is made of a transparent resin material or a phosphor material that converts the wavelength of incident light. The insulating layer 12 may be formed from a resin material having the following properties:

[0144] The front surface 15 of the body 10 may be the surface on which the cavity 20 is disposed, and The rear surface of the main body 10 may be the surface opposite to the front surface 15. It's okay to have one.

[0145] The first lead frame 30 has a first lead portion 3 disposed at the bottom of the cavity 20. 1. A first bonnet disposed in the first outer region 11A, 11C of the first side portion 11 of the body 10. a first heat dissipation portion 33 disposed on the third side portion 13 of the body 10; The first bonding portion 32 is bent from the first lead portion 31 within the main body 10. The first heat dissipation portion 33 is connected to the first bonding portion 3 and protrudes from the first side surface portion 11. The first outer regions 11A and 11C of the first side portion 11 are bent from the main body 2. It may be a region adjacent to the third side surface portion 13 of the first side surface portion 10 .

[0146] The second lead frame 40 has a second lead portion 4 disposed at the bottom of the cavity 20. 1. A second bonnet disposed in the second outer region 11B, 11D of the first side portion 11 of the main body 10. a second heat dissipation portion 43 disposed on the fourth side surface portion 14 of the main body 10. The second bonding portion 42 is bent from the second lead portion 41 within the main body 10. The second heat dissipation portion 43 is bent from the second bonding portion 42. The second outer regions 11B and 11D of the face portion 11 are adjacent to the fourth side portion 14 of the main body 10. It may be a region.

[0147] The gap 17 between the first and second lead portions 31 and 41 is made of the same material as the main body 10. The cavity 20 may be flush with the bottom of the cavity 20 or may protrude from the bottom of the cavity 20. The first outer regions 11A and 11C and the second outer regions 11B and 11C are not limited to the above. D may have sloped regions 11A, 11B and flat regions 11C, 11D), The first and second lead frames 30 and 40 are inclined through the inclined regions 11A and 11B. The first and second bonding portions 32 and 42 protrude, but are not limited to this.

[0148] Here, the light emitting chip 71 is, for example, a light emitting chip provided on the first lead portion 31 of the first lead frame 30. and connected to the first and second lead portions 31 and 41 by wires 72 and 73, respectively. It is connected to the first lead portion 31 with adhesive and to the second lead portion 41 with a wire. Such light emitting chips 71 include horizontal chips, vertical chips, and chips with via structures. The light emitting chip 71 may be mounted by a flip chip method. The optical chip 71 can selectively emit light within the ultraviolet to visible wavelength range. The light emitting chip 71 can emit, for example, ultraviolet or blue peak wavelengths. The light emitting chip 71 is made of at least one of a II-VI group compound and a III-V group compound. The light emitting chip 71 may include, for example, GaN, AlGaN, InGaN, AlInGaN, GaP , AlN, GaAs, AlGaAs, InP, and mixtures thereof. This may be done.

[0149] When looking at the inner surface of the cavity 20, first and second electrodes are arranged around the cavity 20. The second, third, and fourth inner surfaces 21, 22, 23, and 24 are the same as the upper surfaces of the lead frames 30 and 40. The first inner surface 21 adjacent to the first side surface 11 may be inclined relative to a flat straight line. The second inner surface 22 adjacent to the second side surface 12 is in contact with the bottom of the cavity 20. The third inner surface 23 adjacent to the third side surface 13 and the fourth side surface 14 are inclined at a fixed angle. The adjacent fourth inner surface 14 is inclined, and the inclination angle of the first and second inner surfaces 21, 22 is As a result, the first and second inner surfaces 21 and 22 are inclined at an angle smaller than 100°. The third and fourth inner surfaces 23 and 24 reflect the incident light in the first axis direction. The light can be diffused in the second axis X direction.

[0150] The inner surfaces 21, 22, 23, and 24 of the cavity 20 are perpendicular to the front surface 15 of the body 10. The stepped area may be formed so as to form a straight line between the front portion 15 of the body 10 and the front portion 16 of the body 10. The inner surfaces 21, 22, 23, and 24 are arranged to have steps between them. The directional characteristics of the light emitted through the cavity 20 can be controlled.

[0151] The light emitting chip 71 disposed in the cavity 20 of the light emitting device 100 according to the embodiment is one The light emitting chip 71 may be, for example, a red LED chip, a blue LED chip, or the like. You can choose from LED chips, green LED chips, and yellow green LED chips. This can be done.

[0152] A molding member 81 is disposed in the cavity 20 of the main body 11 as shown in FIG. The molding member 81 contains a light-transmitting resin such as silicone or epoxy. The molding member 81 or the light emitting chip 7 may be formed in a single layer or multiple layers. The light emitting element 1 may include a phosphor for changing the wavelength of the emitted light, and the phosphor This is achieved by exciting a part of the light emitted from the light emitting chip 71 and emitting light of a different wavelength. The phosphor may be a quantum dot, YAG, TAG, silicate, or nitride. The phosphor is selectively formed from an oxygen-nitride-based material. The phosphor may include, but is not limited to, at least one of a yellow phosphor and a green phosphor. The surface of the molding member 81 may be formed in a flat, concave, or convex shape. As another example, a fluorescent light source may be provided on the cavity 20, but is not limited to this. A light-transmitting film having a body is disposed, but is not limited thereto.

[0153] A lens is further formed on the top of the body 10, and the lens may be a concave lens or a concave lens. and a convex lens structure, and the light distribution of the light emitted by the light emitting device 100 The inclusion can be adjusted.

[0154] The main body 10 or any one of the lead frames is provided with a light receiving element, a protection element, etc. The semiconductor element is mounted, and the protection element is a thyristor, a Zener diode or a TV S (Transient voltage suppression), and the Zener diode , and protects the light emitting chip from ESD (electro static discharge).

[0155] Referring to FIGS. 41 and 42, at least one or more light-emitting The element 100 is disposed, and a first reflective layer 230 is disposed around the bottom of the light emitting element 100. The light emitting device 100 is an example of the light emitting device disclosed in the embodiment. It can be applied to lighting modules.

[0156] The first and second lead portions 33 and 43 of the light emitting device 100 are connected to the electrode pattern of the substrate 210. Conductive adhesive members 217, 219 are solder or conductive tape attached to the wires 213, 215. and bonded.

[0157] The features, structures, effects, etc. described in the above embodiments are applicable to at least one embodiment of the present invention. The present invention is not limited to any one embodiment, and the specific features exemplified in each embodiment are included in the present invention. The features, structures, effects, etc. of the present invention may be easily understood by a person having ordinary skill in the art to which the present invention pertains. The examples can be combined or modified in various ways. The contents of the present invention should be construed as being included in the scope of the present invention.

[0158] Although the above description has focused on the examples, these are merely examples and do not limit the present invention. It is understood that those skilled in the art will be able to understand the essence of the present invention. Various modifications and applications not exemplified above are possible within the scope of the basic characteristics. For example, each component specifically presented in the embodiments can be modified and implemented. The differences relating to such modifications and applications are the subject of the present invention as defined in the appended claims. should be interpreted as being within the scope of

Claims

1. A substrate; a plurality of light-emitting elements disposed on the substrate; a resin layer disposed on the substrate; a first reflective layer disposed on an upper surface of the resin layer; the resin layer is disposed between the substrate and the first reflective layer; the plurality of light-emitting elements are disposed between the substrate and the upper surface of the resin layer; the resin layer includes a first side surface and a second side surface disposed opposite to each other, the plurality of light-emitting elements are disposed between a first side surface and a second side surface of the resin layer; each of the plurality of light-emitting elements has an emission surface facing the first side surface of the resin layer; the first side surface of the resin layer includes a plurality of protrusions and a plurality of recesses, a first side surface and a second side surface of the resin layer having the same thickness in a vertical direction from the substrate toward the first reflective layer;

2. A substrate; a plurality of light-emitting elements disposed on the substrate; a resin layer disposed on the substrate; a first reflective layer disposed on an upper surface of the resin layer; the resin layer is disposed between the substrate and the first reflective layer; the plurality of light-emitting elements are disposed between the substrate and the upper surface of the resin layer; the resin layer includes a first side surface and a second side surface disposed opposite to each other, the plurality of light-emitting elements are disposed between a first side surface and a second side surface of the resin layer; each of the plurality of light-emitting elements has an emission surface facing the first side surface of the resin layer; the first side surface of the resin layer includes a plurality of protrusions and a plurality of recesses, the plurality of protrusions have the same thickness in a vertical direction from the substrate toward the first reflective layer.

3. The lighting device according to claim 1 , wherein the plurality of protrusions and the plurality of recesses have the same thickness.

4. The lighting device according to claim 1 , wherein the protrusions and the recesses are alternately arranged on the first side surface.

5. The lighting device according to claim 1 , wherein each of the plurality of protrusions has an area facing each of the plurality of light-emitting elements.

6. The substrate has a length in a first direction greater than a width in a second direction, the first direction is a direction perpendicular to the second direction, the first side surface and the second side surface of the resin layer are disposed on opposite sides of each other in the first direction, The lighting device according to claim 1 , wherein the plurality of light-emitting elements are arranged in the first direction.

7. The lighting device according to claim 1 , wherein the plurality of light-emitting elements are arranged so as to be closer to the second side surface than to the first side surface.

8. The lighting device according to claim 1 , wherein each of the plurality of light-emitting elements is a side-view type package that emits light from the light-emitting surface to the first side surface.

9. a second reflective layer disposed between the substrate and the resin layer; The lighting device according to claim 1 , wherein the second reflective layer has a plurality of holes into which a part of each of the plurality of light-emitting elements is inserted.

10. The lighting device according to claim 1 , wherein a radius of curvature of each of the plurality of convex portions is larger than a radius of curvature of each of the plurality of concave portions.

11. The lighting device according to claim 1 , wherein each of the plurality of protrusions has a curved surface that bulges from the second side surface toward the first side surface.

12. The lighting device according to claim 1 , wherein the first reflective layer has a convex portion disposed on an upper surface of each of the plurality of convex portions.

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