Illumination module and lighting device including the same

Abstract

To provide a lighting module for irradiating a line-shaped surface light source in one side direction, and a lighting device including the same.SOLUTION: A lighting device 200 includes: a substrate 210; a plurality of light emitting elements 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 including a first surface from which light emitted from the plurality of light emitting elements is extracted; a second reflective layer 240 disposed on the resin layer; and a light extraction layer 260 disposed on the first surface of the resin layer, wherein the first surface S1 of the resin layer includes: a convex portion having a convex emission surface corresponding to each of the plurality of light emitting devices; and a plurality of concave surfaces between the convex portions, and wherein the light extraction layer may include a first emission portion having a plurality of protrusions on each of the emission surfaces, and a plurality of concave second emission portions between the plurality of protrusions.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a lighting module having a plurality of light sources and a lighting device having the same. The present disclosure relates to a lighting module that provides a line-shaped surface light source. The present disclosure relates to a lighting device having a lighting module, a light unit, a liquid crystal display device, or relates to vehicle lamps. [Background technology]

[0002] Lighting includes not only vehicle lighting but also backlighting for displays and signs. Light-emitting diodes (LEDs) consume less power than existing light sources such as fluorescent lamps and incandescent lamps, and are semi-permanent. Such light-emitting devices have advantages such as long life, fast response speed, safety, and environmental friendliness. are applied to various display devices and various lighting devices such as indoor and outdoor lights. In the past, a lamp using a light emitting element such as a light emitting diode as a light source for a vehicle has been proposed. Light-emitting elements have the advantage of consuming less power than incandescent lamps. Since the angle of light emitted from the element is small, when the light emitting element is used as a vehicle lamp, In this case, there is a demand for an increase in the light-emitting area of ​​a lamp using a light-emitting element. The small size allows for greater freedom in lamp design and a semi-permanent lifespan. It is also more economical. Summary of the Invention [Problem to be solved by the invention]

[0003] The present disclosure relates to a lighting module for illuminating a line-shaped surface light source in one direction and a lighting device having the same. The present disclosure provides a lighting device that converts light emitted from a plurality of light-emitting elements into a line-shaped light source. The present disclosure provides a lighting module that emits light as a surface light source, and a device having the same. A lighting device is provided in which a resin layer is disposed between a substrate and a reflective layer, and light is emitted in a direction toward one side of the resin layer. The present disclosure provides a lighting device in which a resin layer having a light-emitting element is disposed between a plurality of reflective layers. The present disclosure provides a light extraction layer on the light-emitting surface of a resin layer having a light-emitting element between a plurality of reflective layers. The present disclosure provides a lighting device including a light unit having a lighting module, A liquid crystal display device and a vehicle lamp can be provided. [Means for solving the problem]

[0004] The lighting device according to the present disclosure includes a substrate, a plurality of light-emitting elements disposed on the substrate, and the a first reflective layer disposed on a substrate; and a plurality of light-emitting elements disposed on the first reflective layer. a resin layer including a first surface through which light emitted from the molecule is extracted; and a second surface disposed on the resin layer. a light extraction layer disposed on the first surface of the resin layer; and a light extraction layer disposed on the first surface of the resin layer. the first surface includes convex portions having convex emission surfaces corresponding to the plurality of light-emitting elements, and The light extraction layer includes a plurality of concave surfaces between the convex portions, and the light extraction layer is disposed on the first surface of the resin layer. and a second light emitting section in which the first light emitting section is disposed. It can be done.

[0005] According to the present disclosure, the light extraction layer is formed by forming a light extraction layer on one of the substrate, the first reflective layer, and the second reflective layer. The first surface of the resin layer is disposed on the side between the first reflective layer and the second reflective layer. The first light exit portion may be an outer surface, and the vertical height of the first light exit portion may be greater than the thickness of the resin layer. The resin layer includes a recess portion recessed in a second surface direction corresponding to the first surface of the resin layer. The resin layer has a third surface and a fourth surface on both sides of the first surface and the second surface, the third surface and the fourth surface corresponding to each other. The light extraction layer is disposed on the concave surface. The light extraction layer is disposed on the third surface of the resin layer. The first extraction portion extends to the first surface and the fourth surface. The maximum width of the first extraction portion is smaller than the vertical height. The side cross-sectional shape of the first extraction portion may include a hemispherical shape or a triangular shape. The light extraction layer may include any one of PTN, PET, and PEN. The light-emitting surface of the resin layer overlaps with each of the plurality of light-emitting elements in the first direction, and the concave surface is , does not overlap with the plurality of light emitting elements in the first direction, and the first emission portion is The inner surface of the light extraction layer is formed by the resin layer. A part of each of the plurality of light emitting elements is bonded along the first surface of the plurality of protrusions. They are arranged in an imaginary circle that passes through each of them. [Effects of the Invention]

[0006] According to the present disclosure, a lighting device having a line shape with a small height and a long length is According to the present disclosure, the luminous intensity of the emitted light can be improved. A line-shaped surface light source can be provided between the plurality of reflective layers. By forming a resin layer that covers the light-emitting element, the manufacturing process of the lighting module can be simplified. According to the present disclosure, the thin illumination model can reduce light loss and improve light efficiency. Since the modules are provided in the form of a line light source, the degree of freedom in design is increased. The uniformity of the light emitted from the surface light source between the reflective layers can be improved. The optical reliability of the module and the lighting device including the module can be improved.

[0007] The reliability of a vehicle lighting device having a lighting module according to the present disclosure is improved, and the light unit The present invention can be applied to various display devices, surface light source lighting devices, and vehicle lamps. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing an illumination device according to the present disclosure. [Figure 2] FIG. 2 is a plan view of the lighting device of FIG. [Figure 3] FIG. 3 is a diagram showing a detailed structure of a light extraction layer provided on the first surface of the lighting device of FIG. [Figure 4] FIG. 4 is an example of a front view of the lighting device of FIG. [Figure 5] 5 is a cross-sectional view of the illumination device of FIG. 2 taken along the line BB. [Figure 6] 6 is a cross-sectional view of the illumination device of FIG. 2 taken along the line CC. [Figure 7] FIG. 7 is a diagram showing a detailed structure of a light extraction layer provided on the first surface of the resin layer in the lighting device of FIG. [Figure 8] FIG. 8 is a diagram showing another example of the light extraction layer disclosed in FIGS. [Figure 9] FIG. 9 shows another example of the lighting device of FIG. [Figure 10] FIG. 10 is a diagram illustrating an example of light extraction in a lighting device according to the present disclosure. [Figure 11] FIG. 11 shows a modified example of the lighting device according to the present disclosure. [Figure 12] FIG. 12 is an example of a flexible lighting device according to the present disclosure. [Figure 13] FIG. 13 is an example of a flexible lighting device according to the present disclosure. [Figure 14] FIG. 14 shows an example of a lamp to which the lighting device according to the present disclosure is applied. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, with reference to the accompanying drawings, a person skilled in the art to which the present disclosure pertains will A preferred embodiment that can readily be put into practice of the present disclosure will now be described in detail. The embodiment and the configuration illustrated in the drawings are merely preferred embodiments of the present disclosure 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 for these in the present disclosure. In detailing the principles of operation for the preferred embodiment shown, the known functions involved will be Or if it is determined that a specific description of the configuration would unnecessarily obscure the gist of the present disclosure. In such cases, detailed explanations will be omitted. Terms described below are used in consideration of their functions in this disclosure. As defined terms, the meaning of each term is to be interpreted based on the overall content of this specification. Parts with similar functions and actions throughout the drawings should be labeled with the same drawing. The lighting device according to the present disclosure can be used in a variety of lamp devices that require lighting, such as a vehicle It can be applied to dual-use lamps, home lighting devices, and industrial lighting devices. For example, it can be used in vehicle lamps. Where applicable, headlamps, width lights, side mirror lights, fog lights, tail lights mp), brake lights, auxiliary brake lights, turn signals, position lights, daytime running lights, vehicle interior lighting , door scuffs, rear combination lamps, backup lamps, room lamps, The lighting device of the present disclosure can be applied to indoor and outdoor advertising devices, display lighting, etc. It can also be applied to various electric vehicles and other applications that are currently being developed and commercialized. It is currently being considered as a lighting solution for all lighting-related fields and advertising that can be realized through future technological developments. It can be said that it can be applied to various fields.

[0010] 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" are used in the "directly" or "indirectly" forms. In addition, the reference to the top or bottom of each layer is explained based on the drawing. Reveal.

[0011] <Lighting equipment> FIG. 1 is a perspective view showing an illumination device according to the present disclosure, and FIG. 2 is a plan view of the illumination device of FIG. 3 is a diagram showing a detailed structure of a light extraction layer provided on the first surface of the lighting device of FIG. 4 is an example of a front view of the lighting device of FIG. 1, and FIG. 5 is an example of a BB view of the lighting device of FIG. 2. 6 is a side cross-sectional view of the lighting device of FIG. 2 taken along line CC; FIG. 7 is a side cross-sectional view of the lighting device of FIG. 2 taken along line CC; 1 is a diagram showing a detailed structure of a light extraction layer provided on a first surface of a resin layer in a device.

[0012] 1 to 7, a lighting device 200 according to the present disclosure includes a plurality of light-emitting elements 105. The light emitted from the light emitting element 105 is irradiated as a line-shaped surface light source. The light emitted from the light emitting element 105 has a certain height in the vertical direction and a long length. The lighting device 200 includes a substrate 210, a light emitting element disposed on the substrate 210, and a light emitting element. a light source having a light emitting element 105 disposed on the substrate 210 and the light emitting element 105; and a second reflective layer 240 disposed on the resin layer 220. The lighting device 200 includes a first insulating film between the substrate 210 and the resin layer 220. The insulating layer 230 may include a protective layer 230 .

[0013] The light emitting devices 105 are arranged in a plurality in the second direction X. The light emitting elements 105 are arranged in two rows. As another example, the light emitting elements 105 may be arranged in two or more rows in different columns. The intervals G1 between adjacent light emitting elements 105 may be the same. The distance G1 is the thickness of the lighting device 200, for example, the distance from the bottom surface of the substrate 210 to the top surface of the second reflective layer 240. It may be larger than the vertical distance (e.g., Z1) to the upper surface. For example, if the vertical distance is Z1, In this case, the gap G1 can be three times or more the gap Z1. The range of the distance G1 can be, for example, 10 mm to 20 mm. If the value is larger than this range, the luminous intensity may decrease. If the value is smaller than this range, the light emitting element 105 The number of

[0014] 2, 6 and 10, the lighting device 200 has a maximum length X1 in the second direction X. The length in the first direction Y and the length in the second direction Y, X may be greater than the maximum length Y1 in the first direction Y. The maximum length in the second direction may be greater than the thickness Z1 or height in the vertical direction Z. X1 can be varied depending on the number of light emitting elements 105 arranged, and is set to, for example, 30 mm or more. The maximum length Y1 in the first direction is 13 mm or more, for example, 13 mm to 25 mm. The maximum length Y1 of the lighting device 200 in the first direction Y may be in the range of an area in which light emitted from the element 105 is diffused; an area that protects the rear of the light emitting element 105; and pattern area is provided taking into consideration the maximum length Y1 in the first direction Y. The length at the third surface (e.g., S3) of the device is the same as the length at the fourth surface (e.g., S4) For example, the length of the fourth surface S4 in the first direction may be equal to or greater than the length of the third surface S3. The lighting device 200 may be a flexible module or a rigid module. The lighting device 200 may be a rigid module. The lighting device 20 may be flat or curved in at least one of Y and X. 0 includes both sides corresponding to each other in the first direction Y and both sides corresponding to each other in the second direction X. The light emitting element 105 is disposed between vertically opposed layers of reflective material. or adjacent to one of the layers in the area between the layers of vertically opposing reflective material. The light emitting element 105 may be disposed opposite to the supporting member that faces the light emitting element 105 in the vertical direction. The light emitting element 105 may be disposed between a member or layer that reflects light in at least one direction. The lighting device 200 can emit light in a single direction or in multiple directions. The side surfaces may have the same thickness or height. 05 is sealed by a layer of transparent resin material, which is between layers of reflective material. The reflecting layer or member may be disposed between the supporting member and the reflective layer or member.

[0015] As shown in FIGS. 1, 5 and 6, the lighting device 200 includes a substrate 210, a substrate 210a, a substrate 210b, a substrate 210c, a substrate 210d, a substrate 210e, a substrate 210f ... a light emitting element 105 on the substrate 210; a resin layer 220 on the substrate 210 and the light emitting element 105; The lighting device 200 may include a second reflective layer 240 on the resin layer 220. A first reflective layer 230 may be included between the substrate 210 and the resin layer 220. The resin layer 220 is disposed on the light emitting element 105. The light emitting elements 105 may be arranged on the sides of the light emitting elements 105, or may be arranged between adjacent light emitting elements 105. It is disposed above the optical element 105 .

[0016] The substrate 210 includes a printed circuit board (PCB), for example, a resin Printed circuit boards (PCBs), metal core PCBs, flexible PCBs, and The substrate 210 may include a flexible PCB or FR-4 substrate. The substrate 210 may be a substrate made of a rigid material. The circuit pattern of the substrate 210 has a plurality of light emitting elements 105 in the area corresponding to the light emitting element 105. The circuit pattern on the substrate 210 may be disposed on the upper surface. The resin layer 220 is disposed on the substrate 210 or on the upper and lower parts thereof. 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 is formed on the substrate 210 so as to cover the plurality of light emitting elements 105. The resin layer 220 may be a light-transmitting layer. The resin layer 220 may include a glass material as another material. The light emitting elements 105 (101, 102, 103) are arranged in a first row or line in a number n (n ≧2) are arranged on the outer surfaces of the lighting devices 200. The outermost surface of the resin layer 220 may be the outermost surface of the resin layer 220. The surfaces S1, S2, S3, and S4 are the substrate 210, the first reflective layer 230, and the second reflective layer 240. The outer surfaces S1, S2, S3, and S4 of the resin layer 220 are arranged perpendicular to each other. , which are disposed flush with the respective side surfaces of the substrate 210, the first reflective layer 230 and the second reflective layer 240. The resin layer 220 has a first surface S1 and a second surface S2 that correspond to each other in the first direction Y. 2. It may include a third surface S3 and a fourth surface S4 that correspond to each other in the second direction X. The first and second surfaces S1 and S2 are arranged in a second direction from both ends of the third and fourth surfaces S3 and S4. The first surface S1 faces the second surface S2 and may include a curved surface. In the resin layer 220, the lengths of the first surface S1 and the second surface S2 in the second direction X are The height or thickness of the first surface S1 and the second surface S2 in the second direction X may be greater than the height or thickness of the first surface S1 and the second surface S2 in the second direction X. The maximum lengths may be the same or different. The vertical height or thickness of the third surface S3 and the fourth surface S4 may be the same. The height or thickness in the perpendicular direction is the height or thickness in the perpendicular direction of the first surface S1 and the second surface S2. In the resin layer 220, the first surface S1 and the second surface S2 may be the same as the second surface S1. The third surface S3 and the fourth surface S4 may be side surfaces having a long length in the direction X. The first surface S1 may be a side surface having a long length in the first direction Y. or from the first end of the third surface S3 and the fourth surface S4 in the second direction X. The second surface S2 may be an exposed surface. Alternatively, the third surface S3 and the fourth surface S4 may be exposed from second ends of the third surface S3 and the fourth surface S4 in the second direction X. The third and fourth surfaces S3 and S4 are different from the first and second surfaces S1 and S2. The rear surface of the light emitting element 105 may be the surface opposite to the light emitting portion 111.

[0017] The light emitting portion 111 of each of the plurality of light emitting elements 105 corresponds to the first surface S1. The light emitted from the light emitting element 105 is emitted through the first surface S1. The light is emitted through at least one of the second surface S2, the third surface S3, and the fourth surface S4. That is, most of the light emitted from the light emitting element 105 passes through the first surface S1. In the lighting device 200, the maximum lengths Y1 and X1 in the first and second directions are The first surface of the resin layer 220 may be the maximum length in the first and second directions. A line-shaped light source is emitted through S1.

[0018] The first surface S1 of the resin layer 220 is a surface through which light emitted from the light emitting element 105 exits. The first surface S1 may be a front surface or an exit surface, and the The second surface S2 may be a rear surface or a non-light-emitting surface. As another example, the first surface S1 is It is a curved surface that bulges outward in the vertical direction, or a sloped structure that protrudes from the top to the bottom. Alternatively, the first surface S1 may have an inclined structure that protrudes from the lower end toward the upper end. The first surface S1 may be a side surface on which a regular uneven shape or uneven structure is arranged. The first surface S1 may be a region having a surface area larger than the surface area of ​​the second side surface S2. a plurality of light emitting surfaces S11 corresponding to the light emitting elements 101, 102, and 103; The resin layer 22 may include a plurality of concave surfaces S13 disposed between the respective concave surfaces S11. 0 includes a plurality of protrusions P1, P2, and P3 that protrude from the first surface S1 and have an exit surface S11. The protrusions P1, P2, and P3 extend from the first surface S1 to the light exit surface S11. The resin layer 220 has the protrusions P1, P2 on the first surface S1. A concave surface S13 is disposed in the region between P2 and P3. The concave surface S13 is a concave surface or The resin layer 220 or the lighting device 200 may include a flat surface. The area between P2 and P3 may include recesses C1 and C2 recessed in the direction of the second surface S2. The recessed portions C1 and C2 can overlap with the region of the concave surface S13 in the second direction X. The recessed portions C1 and C2 are respectively disposed between the protruding portions P1, P2, and P3. The recesses C1 and C2 may be spaced apart from the third and fourth surfaces S3 and S4. The exit surface S11 and the concave surface S13 are arranged alternately. The first surface S1 is located at the outermost edge in the first direction. The outermost surface S11 may be the third surface S3. Each of the plurality of exit surfaces S11 extends from the fourth surface S4 or from the fourth surface S4. The centers of the light emitting elements 101, 102, and 103 are located at positions corresponding to the centers of the light emitting elements 101, 102, and 103. Each of the plurality of light emitting elements 101, 102, and 103 is disposed on each of the convex portions. The light emitting elements 101, 102, 103 may overlap with the portions P1, P2, and P3 in the first direction Y. The concave surface S13 and the concave surface S14 overlap in the first direction Y. Each of the plurality of light emitting elements 101, 102, and 103 may not overlap with the The recessed portions C1 and C2 may not overlap with each other in the first direction Y. The height may be the same as the vertical thickness of the resin layer 220. The vertical height may be the same as the vertical thickness of the resin layer 220 .

[0019] The resin layer 220 covers or molds the light emitting elements 101, 102, and 103. Each of the light emitting elements 101, 102, and 103 may include a light emitting chip. The light emitting elements 101, 102, and 103 are formed on a reflective surface surrounding the outside of the light emitting chip. The reflective sidewall may include a wall, for example, a body. The reflective sidewall may include a first surface S1 of the resin layer 220 and a second surface S2 of the resin layer 220. The opposing area is open and is provided as a structure surrounding the light emitting chip. The sidewalls are either part of the light emitting elements 101, 102, and 103 or are made of a separate reflective material. The side surfaces of the light emitting elements 101, 102, and 103 excluding the light emitting portion 111 may be , can be made of a reflective material, or can be made of a transparent or opaque material.

[0020] Each of the light emitting elements 101, 102, and 103 has a bonding portion disposed at the bottom thereof. The light emitting elements 101, 102, and 103 are electrically connected to the pads of the plate 210. The circuit patterns on the substrate 210 are connected in series, in series-parallel, parallel-series, or parallel. In another example, the light emitting elements 101, 102, and 103 may be connected in a row. The light emitting elements 1 may be connected in various groups by the circuit pattern 210. 01, 102, 103 are elements having a light emitting chip or LED chips packaged The light emitting chip can include a package that emits blue, red, green, and ultraviolet (U) light. V) can emit light. The light emitting element can emit at least one of white, blue, red, and green light. The elements 101, 102, and 103 emit light in the lateral direction and have their bottoms disposed on the substrate 210. The light emitting elements 101, 102, and 103 are side view type packages. As another example, the light emitting elements 101, 102, and 103 may be LEDs. The LED chip may be a chip, and one side of the LED chip is open and the other side is provided with a reflective member. That's fine.

[0021] As shown in FIG. 2, the light emitting element 105 is used as a reference, and the distance between the light emitting element 105 and the first surface S1 is The maximum distance D2 between the light emitting element 105 and the second surface S2 may be different from the distance D3 between the light emitting element 105 and the second surface S2. The distance D3 between the light emitting element 105 and the second surface S2 may be 2 mm or more. The distance between the light emitting element 105 and the light emitting device 106 can be set to, for example, 2 mm to 20 mm. If the distance D3 between the second surface S2 and the substrate is smaller than the above range, moisture may penetrate the substrate and damage the circuit pattern. If the area that can be formed is larger than the above range, the size of the lighting device 200 becomes large. The maximum distance D2 is the maximum distance between the light emitting surface S11 and the light emitting element 105. The maximum distance may be the linear distance between the light emitting element 105 and the apex of the protrusions P1, P2, and P3. The distance D2 can be 5 mm or more, for example, in the range of 5 mm to 20 mm or 8 mm. If the maximum distance D2 is smaller than the above range, Hot spots may occur, and if the temperature is higher than the above range, the module size may become large. The distance between the line connecting the concave surfaces S13 and each of the light emitting elements 101, 102, and 103 is The distance D1 can be 5 mm or more, for example, in the range of 5 mm to 12 mm, and the distance D If 1 is smaller than the range, the depth D4 of the recessed portions C1 and C2 becomes deep or the maximum distance The distance D2 becomes narrower, and dark areas may occur in the recessed portions C1 and C2. 1 is variable depending on the light directivity angle of each of the light emitting elements 101, 102, and 103. Between the line connecting both ends of P1, P2, and P3 and each of the light emitting elements 101, 102, and 103 If the spacing is too close, the light will be focused on the center area of ​​the exit surface S11, and if the spacing is too far, the light will be focused on the concave surface S12. When light is irradiated onto the projection P1 in the first direction, the luminous intensity through the light exit surface S11 decreases. The maximum length W1 of the recesses P2 and P3 is the distance between the adjacent recesses C1 and C2. The intervals G1 between the light emitting elements 105 may be equal to or smaller than the interval G1 between the light emitting elements 105. When the maximum length W1 is greater than the interval G1 between the light emitting elements 105, the protrusions P1 and P2 , two or more light emitting elements 105 are arranged in the area P3 to increase the luminous intensity, but to control the light distribution. It becomes difficult to make the maximum length W1 of the protrusions P1, P2, and P3 If the interval between the projections P1, P2, and P3 is smaller than G1, the size of the projections P1, P2, and P3 is small, and the uniformity of the light is poor. However, the maximum length of the convex portions P1, P2, and P3 is The length W1 can be 15 mm or more, for example, in the range of 15 mm to 20 mm. The maximum length W1 of the protrusions P1, P2, and P3 is greater than the depth D4 of the recesses C1 and C2. The maximum length W1 of the protrusions P1, P2, and P3 and the depths of the recesses C1 and C2 are The ratio of the recessed portion C1 to the recessed portion 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 is formed between adjacent convex portions P1, P2, and P3. When the depth of the recessed portions C1 and C2 is greater than the above range, the light emitting device 10 The recessed portion C extends to the area adjacent to the light emitting element 105, increasing the optical interference between the light emitting element 105. The depth D4 of the recesses C1 and C2 is determined by the distance from the straight line connecting the vertices of the protrusions P1, P2, and P3 to the recesses C1 and C2. It may be the straight-line distance between the bottom points of the sections C1 and C2.

[0022] As shown in FIGS. 3 to 6, the resin layer 220 and the light emitting element 105 are formed on the substrate 210. The first reflective layer 230 is disposed between the resin layer 220 and the substrate 210. The resin layer 220 is in contact with the top and side surfaces of the light emitting elements 101, 102, and 103. The resin layer 220 may be in contact with the upper surface of the first reflective layer 230. A portion of the resin layer 220 is in contact with the substrate 210 through the hole in the first reflective layer 230. The resin layer 220 can contact the light emitting elements 101, 102, and 103. The first surface S1, the second surface S2, and the second surface S3 of the resin layer 220 can contact the light emitting portion 111 of the resin layer 220. The third surface S3 and the fourth surface S4 are outer surfaces between the first and second reflective layers 230 and 240. The upper surface of the resin layer 220 may be in contact with the second reflective layer 240, and the lower surface may be The resin layer 220 may be in contact with the first reflective layer 230. The upper and lower surfaces of the resin layer 220 may be The first reflective layer 230 may be a flat surface or a curved surface. The bottom surface of the resin layer 220 may be in contact with the substrate 210. The surface area of ​​the resin layer 220 may be the same as the surface area of ​​the upper surface of the substrate 210. The area of ​​the upper surface of the resin layer 220 may be the same as the area of ​​the upper surface of the first reflective layer 230. The area may be the same as the area of ​​the top surface of the second reflective layer 240. The length of the layer 220 may be the same as the length (e.g., X1) of the substrate 210. The maximum length of the resin layer 220 is the maximum length of the first reflective layer 230 or the second reflective layer 240. The maximum length (e.g., Y1) of the resin layer 220 in the first direction Y may be the same as the maximum length. The maximum length of the resin layer 220 in the first direction Y may be the same as the maximum length of the substrate 210. The maximum length (for example, Y1) may be the same as the maximum length of the first reflective layer 230. The maximum length (for example, Y1) of the resin layer 220 in the Y direction is equal to the maximum length of the second reflective layer 240. The minimum length of the resin layer 220 in the first direction Y may be the same as the maximum length of the substrate 210. The minimum length of the resin layer 220 in the first direction Y may be equal to the first reverse length. The minimum length in the first direction Y may be the same as the minimum length of the reflective layer 230 or the second reflective layer 240. The major length Y1 is the distance between the apex (or high point) of the convex portions P1, P2, and P3 of the lighting device and the second surface S2. The minimum length is the length between the bottom point of the concave surface S13 of the lighting device and the second surface S2. The resin layer 220 may be disposed between the first and second reflective layers 230 and 240. The first and second reflective layers 230 and 240 have the same area, and the resin layer 220 Therefore, the resin layer 220 can face the upper and lower surfaces of the light emitting element 1. Diffuses light emitted from the first reflective layer 230 and the light reflected by the second reflective layer 240. The light can be guided in the direction of the first surface S1 and emitted.

[0023] As shown in FIG. 5, the resin layer 220 has a thickness Zb that is thicker than the thickness of the light emitting element 105. Here, the thickness of the light emitting element 105 may be determined by the length of the light emitting element 105 in the vertical direction. The thickness of the light emitting element 105 may be less than the length in the first direction Y. The thickness of the light emitting element 105 may be, for example, 1 mm to 2 mm. For example, it can be in the range of 1.2 mm to 1.8 mm. A part of the resin layer 220 is formed between the light emitting elements 101, 102, and 103 and the second reflective layer 2. 40. As a result, the resin layer 220 is disposed between the light emitting elements 101, 1 The light emitting element 105 can protect the upper portions of the light emitting elements 102 and 103 and prevent moisture from penetrating. In the case of the light-emitting element 200, the substrate 210 is disposed on the bottom and the resin layer 220 is disposed on the top. Therefore, the upper surface of the resin layer 220 and the The distance between the upper surfaces of the light emitting elements 101, 102, and 103 is 0.6 mm or less, for example 0. The upper part of the resin layer 220 may be arranged in a range of 5 mm to 0.6 mm. 101, 102, and 103, and the upper portions of the light emitting elements 101, 102, and 103 As shown in Figs. 2 and 3, the convex surfaces of the convex portions P1, P2, and P3 can be protected. The exit surface S11 may have a first curvature. The concave surface S13 may be flat or The convex portions P1, P2, and P3 may have a curvature greater than the first curvature. The radius of curvature is 7.5 mm or more, for example, in the range of 7.5 mm to 14 mm or 8 mm to 11 mm. The curvature radius of each of the convex portions P1, P2, and P3 can be in the range of m. If it is smaller, the improvement in luminous intensity will be slight, and if it is larger than the range, dark areas may occur. When the concave surface S13 has a curvature, the radius of curvature of the concave surface S13 is The radius of curvature of the concave surface S13 may be 0.12 times or less than the radius of curvature of the concave surface S14. The ratio of the curvature radii of the convex portions P1, P2, and P3 is in the range of 1:8 to 1:28. When the curvature radius of the concave surface S13 is smaller than the above range, the concave surface S13 When the amount of light emitted is reduced and the dark area increases, and the amount of light emitted is larger than the above range, the convex portions P1, P2, The size of P3 becomes small, and optical interference between the light emitting elements 105 may occur. Therefore, the depth D4 and the radius of curvature of the concave surface S13 are determined based on the position of the light emitting element 105 and the Taking into consideration the directivity angle of the optical element 105, the protrusions P1, P2, and P3 and the recesses C1 and C 2 and suppressing the dark areas in the recessed portions C1 and C2. The radius of curvature of the concave surface S13 is in the range of 0.5 to 1 mm. The concave surface S13 is provided in a curved shape with a predetermined curvature, so that the incident light can be The recessed portions C1 and C2 can refract and transmit light incident thereto. can reduce the occurrence.

[0024] As shown in FIG. 5, the thickness Zb of the resin layer 220 is The thickness Zb of the resin layer 220 may be the distance between the first and second reflective layers. The thickness Zb may be the vertical distance between the first and second reflective layers 230 and 240. The thickness Zb may be equal to the distance between the first surface S1 and the second surface S2. For example, the distance between the first surface S1 and the second surface S2 may be smaller than the distance between the first surface S1 and the second surface S2. The distance between the first direction Y and the surface S2 may include a maximum length Y1 and a minimum length Y2. The maximum length Y1 may be the linear distance between the apex of the protrusion P1 and the second surface S2. The distance or interval between the third surface S3 and the fourth surface S4 of the resin layer 220 is The minimum length in the first direction Y may be greater than the distance between the vertex of the first surface S1 and the second surface S2. It may be the linear distance between the concave surface S13 and the second surface S2. The distance or spacing between the first surface S1 and the second surface S2 of the resin layer 220 is The distance or interval between the first reflective layer and the second reflective layer may be smaller than the distance or interval between the first reflective layer and the second reflective layer. The distance between the layers 230 and 240 is set to be smaller than the length or minimum width of the lighting device 200 in the first direction Y. By arranging the light sources in a line shape in the first direction Y, the light source can be provided with improved luminance and In addition, the lighting device has a certain thickness and can be The resin layer 220 may be provided with a flexible property that can be uneven in thickness Z. The thickness Zb of the resin layer 220 is The thickness may be equal to or less than twice the thickness of the light emitting element 105. For example, the thickness of the light emitting element 105 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 2 mm or less, for example, For example, it can have a range of 1.5mm to 1.9mm or a range of 1.6mm to 1.8mm. The thickness Zb of the resin layer 220 is 0.8 times or less the thickness Z1 of the lighting device 200. For example, the thickness Z1 of the lighting device 200 may be in the range of 0.4 to 0.8 times. The difference between the thickness Z1 of the resin layer 220 and the thickness Z1 of the lighting device 200 is 1.2 mm or less. Since the light source 200 is disposed in a flexible manner, it is possible to prevent a decrease in the light efficiency of the lighting device 200. The thickness Zb of the resin layer 220 is The length or maximum length of the resin layer 220 may be smaller than the length or maximum length of the resin layer 220 in the second direction X. The thickness Zb may be smaller than the maximum length W1 of the light exit surface S11 in the second direction X. That is, By providing a slim resin layer 220 with a thickness Zb, a line-shaped The resin layer 220 can provide a surface light source. Molding compound (SMC), epoxy or epoxy molding compound (EMC) The resin layer 220 may include a UV (ultraviolet) curable resin. Alternatively, it may contain a thermosetting resin material, such as PC, OPS, PMMA, PVC, etc. For example, the main material of the resin layer 220 may be urethane acrylate oligomer. For example, a resin material made primarily of urethane, a synthetic oligomer, can be used. A mixture of acrylate oligomer and polyacrylic polymer type is used. Of course, the low boiling point dilutable reactive monomer IBOA (isobornyl acrylamide) is also used. ylate), HPA (Hydroxylpropyl acrylate), 2-HEA (2-hydroxyethyl acrylate), etc. The monomer may further contain a photoinitiator (e.g., 1-hydroxycyclohexyl) It is possible to mix in additives such as methyl phenyl-ketone or antioxidants.

[0025] 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 be a yellow, green, blue or red phosphor. The resin layer 220 may include at least one of the protrusions P1, P2, The area where P3 is formed may be provided as a lens portion. is provided in a lens shape having a convex surface, and when viewed from the top, it has a hemispherical or semicircular shape. The lens may have a semi-elliptical or aspherical shape. The lens portion may include a lens corresponding to the center of the light emitting element 105. The closer the vertex is to the light emitting element 101, the farther the distance is from the light emitting element 101. The thickness in the Z direction may be the thickness of the resin layer 220. The upper and lower surfaces are flat, and the surface is curved in the direction of the first surface S1. The lens portion has a first flat reflective layer and a second flat reflective layer on the top and bottom. It is disposed between the second reflective layers 230 and 240 and refracts light to the first surface S1. The lens portion can receive light that is incident on a region that is off the optical axis. The lighting device 200 can refract light to an exit angle larger than the entrance angle. When the resin layer 220, the first reflective layer 230, and the second reflective layer 230 have a curved shape due to their characteristics, The resin layer 220 has an output surface S11, which is formed of a non-flat curved region. Each of the light emitting elements 101, 102, and 103 emits light. In the resin layer 220, the protrusions P1, P2, and P3 are disposed between the protrusions P1, P2, and P3. The recessed portions C1 and C2 are provided as recesses recessed in the direction of the second surface S2. The recesses C1 and C2 of the resin layer 220 are formed on the concave surface S13 of the resin layer 220. Through these recesses C1 and C2, the area between the protrusions P1, P2, and P3 is Since the light emitted from each of the light emitting elements 101, 102, and 103 is emitted, the recessed portions C1 and C The occurrence of dark areas in the resin layer 220 can be reduced. When the recesses C1 and C2 are disposed, the substrate 210 and the first reflector 210 are The second reflective layer 230 and the second reflective layer 240 are formed such that one side of the first reflective layer 230 is provided with the protrusions P1, P2, P3 and the recess C. The resin layer 220 is provided with a shape corresponding to the convex portions P1, P2, P3 or C2. The number of lens portions may be the same as the number of the light emitting elements 101, 102, and 103.

[0026] 5 and 6, the first reflective layer 230 is formed on the light emitting device 105. The first reflective layer 230 is an upper layer of the substrate 210. The first reflective layer 230 may be formed on the substrate 2 or may be formed as a separate layer. The upper surface of the first reflective layer 230 is adhered to the upper surface of the resin layer 220. The first reflective layer 230 is formed by adhering a plurality of layers in an area corresponding to the bottom surface of the light emitting element 105. The light emitting element 105 is connected to the substrate 210 through the hole 232. A part of the resin layer 220 contacts the substrate 210 through the hole 232. The hole 232 is formed through a hole through which the light emitting element 105 is bonded to the substrate 210. The first reflective layer 230 may be formed as a single layer or a multi-layer structure. The first reflective layer 230 may include a material that reflects light, such as a metal or a non-metal material. When the first reflective layer 230 is made of a metal, it is possible to use stainless steel, aluminum (Al), silver (Ag), or the like. It can contain a metal layer such as Ag, and if it is a non-metallic material, it can be made of white resin material or plastic. The first reflective layer 230 may be made of a white resin material or polyester (P The first reflective layer 230 may include a low-reflection film, a high-reflection film, a reflective ... The reflecting film may include at least one of a diffuse reflection film and a regular reflection film. The first reflective layer 230 is, for example, a specular reflective film for reflecting incident light to the first surface S1. It may be provided as.

[0027] As shown in FIG. 4, the thickness Zc of the first reflective layer 230 is smaller than the thickness Za of the substrate 210. The thickness Zc of the first reflective layer 230 may be 0.5 times the thickness Za of the substrate 210. The first and second optical fibers are arranged at a ratio of 1:1 or more and 1:1 or less, so that the transmission loss of incident light can be reduced. The thickness Zc of the reflective layer 230 may be in the range of 0.2 mm to 0.4 mm. If the thickness is smaller than this range, a loss in light transmission occurs. If the thickness is larger than this range, the thickness Z of the lighting device 200 The second reflective layer 240 is disposed on the entire upper surface of the resin layer 220, The second reflective layer 240 has the same thickness as the first reflective layer 230. The second reflective layer 240 may be made of a material that reflects light and reduces light transmission loss. The first reflective layer 230 has a higher light reflectivity or a greater thickness than the first reflective layer 230. The second reflective layer 240 may have a thickness Zc equal to or greater than the thickness Zc of the first reflective layer 230. For example, the first and second reflective layers 230 and 240 may be The second reflective layer 240 may be made of the same material and have the same thickness. The thickness Zd of the second reflective layer 240 may be equal to or smaller than the thickness Za of the substrate 210. , the thickness Za of the substrate 210 is 0.5 times or more, for example, in the range of 0.5 to 1 times, The thickness Zd of the second reflective layer 240 is 0.2 If the thickness is smaller than this range, light transmission loss occurs. If the thickness of the second reflective layer 2 is greater than the above range, the thickness Z1 of the lighting device 200 increases. The second reflective layer 240 may be formed as a single layer or a multi-layer structure. The second reflective layer 240 may include a metal or a non-metallic material. In this case, it may include a metal layer such as stainless steel, aluminum (Al), or silver (Ag), In the case of the non-metallic material, it may include a white resin material or a plastic material. The reflective layer 240 may include a white resin material or a polyester (PET) material. The reflective layer 240 may be a low-reflection film, a high-reflection film, a diffuse reflection film, or a regular reflection film. The second reflective layer 240 may include, for example, The first surface S1 may be provided as a specular reflection film so that light travels in the direction of the first surface S1. The substrate 2 and the second reflective layers 230 and 240 may be made of the same or different materials. 10. The laminated structure of the first reflective layer 230, the resin layer 220, and the second reflective layer 240 is In one direction, the structure of the protrusions P1, P2, and P3 and the recesses C1 and C2 may be included. The convex portions P1, P2, and P3 have flat upper and lower surfaces and curved or The recessed portions C1 and C2 may have a flat or semi-spherical shape in the direction of the second surface S2. The light emitting surface S11 and the concave surface S12 in the resin layer 220 may include a concave curved surface. At least one or both of the 13 are treated with a haze surface to diffuse light. The haze surface is processed to be rougher than the inner surface of the resin layer 220. It can diffuse the light that is emitted.

[0028] The lighting device 200 according to the present disclosure provides a thickness Z1 in the third direction Z in the form of a line. The thickness of the lighting device 200 is 1 / 2 mm. Z1 is 3 mm or less, for example, 3 mm or less, or has a range of 2.4 mm to 3 mm. That is, the lighting device 200 can be provided as a surface light source in a line shape of 3 mm or less. As another example, the lighting device 200 may be arranged in a range of 2 mm to 6 mm. In this case, the thickness of the lighting device 200 increases, but the thickness of the resin layer 220 can be increased. By providing a larger width, the line width can be increased, thereby increasing the light distribution area.

[0029] As shown in FIGS. 1 to 3, the lighting device 200 according to the present disclosure includes a light extraction element disposed on the first surface S1. The light extraction layer 260 may include a layer 260 on the first surface S1 of the resin layer 220. The light extraction layer 260 is disposed on the first surface S1 from the side of the substrate 210 to the second reflective layer 260. 9, the light extraction layer 260 extends to the side of the first On the first surface S1, the first reflective layer 230 extends from the side of the first reflective layer 230 to the side of the second reflective layer 240. The vertical height of the light extraction layer 260 is the distance from the bottom surface of the substrate 210 to the second reflective layer 240. or a height (for example, Z1) from the bottom surface of the first reflective layer 230 to the top surface of the second reflective layer 2 The light extraction layer 260 may be formed on the first surface of the resin layer 220. The light extraction layer 260 may be attached or bonded to the side surface S1 of the substrate 210. It may be attached or bonded to at least one of the sides of the first and second reflective layers 230 and 240. An adhesive layer (not shown) is disposed between the inner surface of the light extraction layer 260 and the first surface S1. The adhesive layer may include a transparent resin material such as silicone or epoxy. The light extraction layer 260 may be a light-transmitting member, such as a diffusion layer or an optical layer. The material of the light extraction layer 260 may include a synthetic resin or a photo-curable resin. polyesters, epoxy resins, polyester (meth)acrylates, epoxy (meth)acrylates (Meth)acrylate resins such as acrylate, urethane (meth)acrylate, and mixtures thereof The light extraction layer 260 may be made of, for example, polyethylene terephthalate (PET). terephtalate), PTT (polytrimethyleneterephtalate), PBT (polybutyleneterephtalate) , PEN (polyethylene naphthalate), PTN (polytrimethylene naphthalate), PBN (polybuty lene naphthalate), PCT (polycyclohexadimethylene terephthalate), PCN (polycyclohexa dimethylene naphthalate), PCC(polycyclohexadimethylene cyclohexadimethylcar Among these, PET, PEN, PCT, and PCN are preferred. In particular, any one of PTN, PET, and PEN can be used. The refractive index of the glass may be 1.5 or less, for example, in the range of 1.41 to 1.59, and the brightness The light extraction layer 260 is formed along the first surface S1 of the resin layer 220. By arranging the first surface S1 in such a manner, the brightness of the light emitted through the light exit surface S11 of the first surface S1 is improved. The light extraction layer 260 may have a concave-convex pattern or a prism pattern on its outer surface. The light extraction layer 26 can diffuse the incident light and improve the uniformity of the light. 0 is disposed along the light exit surface S11 and the concave surface S13 of the resin layer 220.

[0030] The light extraction layer 260 includes a first light extraction portion F1 and a second light extraction portion F2 arranged in one direction. The first extraction portion F1 includes a plurality of protrusions, and the second extraction portion F2 includes a plurality of protrusions. The first extraction portion F1 may include a plurality of grooves arranged on the light extraction layer 260. The second extraction portion F2 may protrude from the body or base portion of the light extraction layer 2. 60 may be the outer surface. The grooves are respectively disposed between the plurality of protrusions. The protrusions and grooves may be arranged alternately, and the spacing between the protrusions may be constant. The spacing between the protrusions on the surface may be constant. a first region having a convex curvature along the projection surface S11, and a second region having a concave or recessed curvature along the concave surface S13; The first area may include a second area having a flat surface. Alternatively, the second region may be a surface corresponding to the outer surface of the protrusions P1, P2, and P3. The first extraction portion F1 may be a region corresponding to the concave surface S13. The outer surface of the first extraction portion F1 may be a curved surface. For example, the first extraction portion F1 may have a triangular shape as shown in FIG. The second extraction portion F2 may be an outer surface connecting the protrusions. The surface may include a curved surface.

[0031] As shown in FIG. 1, the height of the first extracted portion F1, i.e., the length in the third direction Z, is 20 (for example, Zb), and the thickness of the second reflective layer 240 from the side of the substrate 210 The height of the first extraction portion F1 in the third direction Z is As shown in FIGS. 3 and 5, the maximum width B1 of the first extraction portion F1 is The maximum width B1 of the first extracted portion F1 may be greater than the thickness B3 of the first extracted portion F1. The width of the bottom end of the protrusion is 50 μm or more, for example, in the range of 50 to 150 μm. The thickness B3 of the first extracted portion F1 is the maximum thickness of the protrusion, and is The maximum thickness B3 of the first extracted portion F1 may be 20 μm or more. The maximum width B1 of the first extracted portion F1 may be in the range of, for example, 20 to 50 μm. is at least twice the maximum thickness B3, for example, in the range of 2 to 4 times the maximum thickness B3. The width B2 of the second extracted portion F2 is equal to or greater than the thickness B3 of the first extracted portion F1. It may be small, 15 μm or more, for example, in the range of 15 to 30 μm. The maximum width of the first extraction portion F1 may be smaller than the vertical height.

[0032] When the maximum width B1 of the first extraction portion F1 is smaller than the above range, the amount of incident light is reduced. If the range is exceeded, the uniformity of the light emitted from the light emitting surface S11 may be reduced. The thickness B3 of the first extraction portion F1 is set to reduce the refraction of light and increase the optical loss. If the guide efficiency is less than the above range, the diffusion efficiency may decrease. If the distance is greater than the above range, the uniformity of the light may be reduced. Five or more protrusions are arranged along the light exit surface S11, and light incident through the light exit surface S11 is The protrusions of the first extraction portions F1 can diffuse the light emitted from the light emitting elements 101 and 102. 2, 103 can correspond to two or more. As a result, the uniformity of the emitted light is improved. The resulting dark areas are improved by the light extraction layer 260. The maximum thickness of the light extraction layer 260 is The width B1 of the first extraction portion F1 may be smaller than the maximum width B1 of the first extraction portion F1. Since the resin layer 220 is provided with a thickness that does not reduce the flexibility, the first surface S1 of the resin layer 220, i.e. The light emitting surface S11 and the concave surface S13 are closely attached to each other, preventing the problem of separation from the first surface S1. Here, the concave surface S13 is provided with the first extraction portion F1 or the second extraction portion F 2 is arranged, but is not limited to this.

[0033] As shown in FIG. 2, the first end Fa of the light extraction layer 260 is bonded to the third side surface S3. The second end Fb is disposed on the fourth side surface S4. The light may be positioned so as to overlap with the second light emitting element 101 in the second direction X. The second end Fb of the extraction layer 260 overlaps the last-placed third light-emitting element 103 in the second direction X. The first end and the second end Fa, Fb of the light extraction layer 260 may be positioned as above. overlaps with the light emitting element 105 in the second direction X, The first and second ends of the light extraction layer 260 can reduce the loss of light emitted from the first and second ends. The portions Fa and Fb are located in the direction of the second side surface S2 from the straight line Xc passing through the light emitting portion 111 of the light emitting element 105. As a result, the light at the third side surface S3 and the fourth side surface S4 of the resin layer 220 is The light loss due to the extraction layer 260 can be reduced. The two ends Fa and Fb are located closer to the light emitting element 1 than the imaginary straight line Xb connecting the plurality of concave surfaces S13. 105 are arranged adjacent to the virtual line Xc connecting the exit portions 111 of the resin layer This can reduce the loss of light traveling in the directions of the third and fourth sides S3 and S4 of the 220. The disclosure is that the imaginary straight line Xb extending from the multiple concave surfaces S13 is located on a horizontal line. The imaginary line Xa connecting the plurality of light exit surfaces S11 is , are arranged on a horizontal straight line or in an inclined oblique line. The distance between Xa and Xb (for example, D4) is the same or becomes smaller toward the fourth side. It is also possible.

[0034] 1 and 7, the convex portions P1, P2, and P3 of the resin layer 220 or the light-emitting surface S The shape of 11 can include a hemispherical shape, a semicircular shape, a semi-elliptical shape, or an aspherical shape. Here, the convex portions P1, P2, P3 or the points along the exit surface S11 that contact the concave surface S13 The imaginary circle Q4 passing through at least two of the center points includes one of the light emitting elements 105. The center axis Ya passing through the center Pr of the virtual circle Q4 and the center of the light emitting element 105 is is perpendicular to the imaginary straight line Xc passing through the light emitting portion 111 of the light emitting element 105, or In this case, the central axes on the respective convex portions P1, P2, and P3 are The concave surfaces S adjacent to each other with respect to the center of the light emitting element 105 may be parallel to each other. The angle W1 between the point where the light is incident and the point where the light is incident can be considered as the light directivity angle, for example, 115 degrees to 135 degrees. The convex portions P1, P2, P3 and the light exit surface S11 may have a hemispherical shape. In this case, the distance Rr from the center Pr of the virtual circle to the exit surface S11 is determined along the radius of curvature. can be in contact with the curved surface.

[0035] Here, as shown in FIGS. 7 and 11, the angle between Ya and Xc is , and P3 are placed on the same focal length target and irradiated with light. The light emitting elements 101, 101A, and 101B and the respective central axes Yb thereof are oriented in the direction of the target. As a result, at any of the convex portions P1, P2, and P3, the The angle between Ya and Xc is set to be equal to or greater than 90 degrees, for example, in the range of 90 degrees to 150 degrees. That is, a line passing through the center of each of the light emitting elements 101, 102, and 103 and the center of the virtual circle can be The central axes Ya, Ya1, and Ya2 are extended to fit into one of the points (targets). That is, the central axes Ya, Ya1, Ya2 on the respective convex portions P1, P1a, P1b are The two may not be parallel to each other.

[0036] At this time, the imaginary line Xa passing through the adjacent convex portions P1, P1a, P1b or the exit surface S1 is , can be inclined at a predetermined angle Q5 from the horizontal line X0. The angle Q5 is 0.1 The angle may be 60 degrees or more, and may be variable depending on the number of light-emitting elements. .

[0037] 8 and 5, the first extraction portion F3 of the light extraction layer 260 has a side cross-sectional shape The outer surface of the first extraction portion F3 may have a prism pattern. The structure has a shape in which the vertex is an angular surface or a curved surface. The second extraction portion F4 may include a curved surface as an outer surface connecting the projections. The height of the first extracted portion F3 in the third direction Z is equal to the thickness (Zb, 5) and extends from the side of the substrate 210 to the side of the second reflective layer 240. The height of the first extraction portion F3 in the third direction Z is the same as the height of the light extraction layer 260. The maximum width B1 of the first extracted portion F3 may be less than the maximum thickness B3 of the first extracted portion F3. The maximum width B1 of the first extracted portion F3 may be equal to or smaller than the width of the bottom end of the protrusion. The first extraction part F3 may have a thickness of 4 μm or more, for example, in the range of 4 to 15 μm. The thickness B3 may be the maximum thickness of the protrusion and the maximum length of the protrusion protruding in the first direction. The thickness B3 of the first extracted portion F3 is 4 μm or more, for example, in the range of 4 to 20 μm. The width B2 of the second extracted portion F4 is equal to or greater than the thickness B3 of the first extracted portion F3. It may be small, and may be 4 μm or more, for example, in the range of 4 to 10 μm. If the maximum width of the extraction portion F3 is smaller than the above range, the amount of incident light may decrease or the uniformity of the light may decrease. If the thickness is greater than the above range, the adhesive strength between the output surface S11 and the curved surface may decrease. The thickness B3 of the first extraction portion F3 is set to a value that is smaller than the thickness B3 of the first extraction portion F3 due to the prism pattern shape. When the refractive index is smaller than the above range, the diffusion efficiency is reduced. If the value is greater than the above range, the uniformity of the light may be reduced. The maximum width of the first extraction portion F3 may be smaller than the vertical height. Five or more of them are arranged along the light exit surface S11, and the light incident through the light exit surface S11 is The protrusions of the first extraction portions F3 are arranged to diffuse the light emitted from the light emitting elements 101, 102, 103, 104, 105, 106, 107, 108, 109, 110A, 110B, 111C, 111D, 111E, 111F, 111G, 111H, 111I, 111 Therefore, the light emitted through the light extraction layer 260 can be The uniformity of the incident light is improved. At this time, the dark portion that may occur on the recessed portions C1 and C2 is The section is improved by the light extraction layer 260 .

[0038] Referring to FIG. 10, 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 point of the recess C0 is 50 degrees or more. The recessed portion C0 may have an angle in the range of, for example, 50 degrees to 80 degrees. By separating the light emitting element 105 at the angle R0, the light emitting element 105 is refracted and directed to the outside. The protrusions P0 and recesses C0 are the same as those of the protrusions disclosed in FIGS. It may include P1, P2, P3 and recesses C1 and C2.

[0039] As shown in FIG. 12, the illumination device according to the present disclosure has a structure in which the third and fourth surfaces S3 and S4 are used as reference surfaces. As it approaches the center area, it bends convexly downward or toward the substrate, or conversely, it bends convexly upward or As shown in FIG. 13, the illumination device according to the present disclosure can be curved in a convex shape toward the first reflective layer. The position is bulged upward from the third surface S3 to the fourth surface S4 or toward the second reflective layer. and a region between the bulged region or a region adjacent to the bulged region in a downward direction or The protruding region may include at least one recessed region recessed toward the substrate. The recessed and recessed areas are arranged alternately.

[0040] The above disclosed embodiments, variations or alternatives may be selectively mixed with each other or with the alternatives. The structure can be replaced, and the above-disclosed embodiments can be selectively applied to each embodiment. In addition, the second, third and fourth surfaces S2, S3 of the resin layer 220, excluding the first surface, , S4 may be attached with a reflective layer or reflective film made of a resin material. The layer or reflective film can block light leakage in the non-emitting areas.

[0041] The present disclosure provides a lighting device having a resin layer 220 thickness of 3 mm or less or thicker, For example, when the resin layer 220 is provided with a thickness of 3 mm to 6 mm, the light emitting area increases as the thickness of the resin layer 220 increases. The lighting device according to the present disclosure can be applied to a lamp as shown in FIG. The lamps can be, for example, headlamps, width lamps, side mirrors, etc. indicator lights, fog lights, tail lights, brake lights, daytime running lights, vehicle interior lighting, door stop lights It can be applied to cuffs, rear combination lamps or backup lamps.

[0042] Referring to FIG. 14, the lamp is housed in a housing having an inner lens 502. The first light emitting element and the second light emitting element 101 and 103 disclosed above are disposed inside the housing 503. The thickness of the lighting device 200 may be less than that of the housing 50. The width Z3 of the light emitting portion 515 of the inner lens 502 is large enough to be inserted into the inner width Z3 of the inner lens 502. may be equal to or less than twice the thickness of the lighting device 200, to prevent a decrease in luminous intensity. The inner lens 502 can be positioned at a predetermined distance from the front surface of the lighting device 200. The inner lens 502 may be spaced apart from the light emitting surface by, for example, 10 mm or more. An outer lens 501 is disposed on the outer surface of the lamp. For example, other lamps may have flexible structures, such as curved or curved structures when viewed from the side. It can be applied as a structure.

[0043] The features, structures, effects, etc. described in the above embodiments may be incorporated into at least one embodiment of the present disclosure. The present invention is not limited to any one embodiment. 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 disclosure should be construed as included within the scope of the present disclosure.

Claims

1. A substrate; a plurality of light-emitting elements disposed on the substrate; a first reflective layer disposed on the substrate; a resin layer disposed on the first reflective layer and including a first surface through which light emitted from the light emitting element is extracted; a second reflective layer disposed on the resin layer; and a light extraction layer disposed along the first surface of the resin layer; the plurality of light emitting elements are in contact with the resin layer and electrically connected to the substrate; the resin layer is disposed between the first reflective layer and the second reflective layer; the first surface of the resin layer has a convex light-emitting surface corresponding to each of the plurality of light-emitting elements, the resin layer includes a plurality of convex portions each having the convex light exit surface, the plurality of convex portions are disposed between the first reflective layer and the second reflective layer, the light extraction layer disposed on the outer side of the first surface of the resin layer includes a plurality of protrusions; Each of the plurality of protrusions has a curved surface that is convex from the inside to the outside of the light extraction layer, The number of the plurality of protrusions is greater than the number of the plurality of convex portions.

2. The lighting device of claim 1 , wherein the light extraction layer extends outside the substrate and the first and second reflective layers.

3. the light extraction layer is bonded to the first surface of the resin layer with an adhesive; The lighting device of claim 1 , wherein the light extraction layer is further adhered to at least one of the first and second reflective layers.

4. The lighting device according to claim 1 , wherein the vertical height of the light extraction layer is greater than the thickness of the resin layer.

5. The lighting device according to claim 1 , wherein a vertical height of the plurality of protrusions is greater than a thickness of the resin layer.

6. the light extraction layer includes an inner surface disposed on the first surface of the resin layer and an outer surface having the plurality of protrusions; The lighting device according to claim 1 , wherein the plurality of protrusions extend outside the first reflective layer and the second reflective layer.

7. The plurality of light-emitting elements are arranged in a second direction, each of the plurality of light-emitting elements overlaps with each of the plurality of protrusions in a first direction perpendicular to the second direction; The lighting device according to claim 1 , wherein at least one of the plurality of protrusions arranged outside the light extraction layer overlaps with each of the plurality of light-emitting elements in the first direction.

8. Each of the plurality of light-emitting elements includes an emission portion that emits light toward each of the plurality of convex portions.

8. The lighting device according to claim 1.

9. the resin layer includes a second surface opposite to the first surface of the resin layer, and third and fourth surfaces disposed on both sides of the first and second surfaces, the resin layer includes concave surfaces respectively disposed in regions between the plurality of convex portions, The lighting device according to claim 1 , wherein the light extraction layer is further disposed on the concave surface.

10. The lighting device of claim 9 , wherein the light extraction layer extends to a portion of the third surface adjacent to one side of the first surface of the resin layer.

11. The lighting device of claim 10 , wherein the light extraction layer extends to a portion of the fourth surface adjacent to the other side of the first surface of the resin layer.

12. The lighting device according to claim 1 , wherein the light extraction layer and the resin layer are made of different materials.

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