Illumination module and lighting device including the same

Abstract

To provide a lighting module for radiating surface light in a line form in one direction, and to provide a luminaire including the same.SOLUTION: A luminaire includes: a substrate; a plurality of light sources arranged on the substrate; a resin layer arranged on the substrate and the plurality of light sources; and a first reflection layer arranged on the resin layer. The resin layer includes an emission surface opposed to the light source. The emission surface of the resin layer includes: a plurality of protrusion parts opposed to each of the light sources; and a plurality of recess parts arranged between the plurality of protrusion parts respectively. A recessed surface arranged at each of the plurality of recess parts has a curvature, and the curvature radius of the recessed surface increases as it goes in one direction.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] Embodiments of the invention relate to a lighting module having multiple light sources and a lighting device having the same. An embodiment of the invention is a lighting module that provides a line-shaped surface light source. An embodiment of the invention relates to a lighting device having a lighting module, a light unit , and relates to a liquid crystal display device or a vehicle lamp. [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 embodiment of the present invention is a lighting module that irradiates a linear surface light in one direction and a lighting device having the same. In an embodiment of the invention, a lighting device is provided that converts light emitted from a plurality of light sources into a line-shaped light. The present invention provides a lighting module that emits light as a light source or a surface light source, and a device having the same. In the embodiment, a light source and a resin layer are disposed between a substrate and a reflective layer, and light is irradiated in one direction on the resin layer. In an embodiment of the invention, a resin layer having a light source between a plurality of reflective layers is provided. An embodiment of the invention provides a lighting device in which a light source and a resin layer are disposed between a plurality of reflective layers. The resin layer is then arranged to provide a lighting device having a light extraction structure on one side thereof. A light source and a resin layer are disposed between a plurality of reflective layers, and a convex portion is formed on one surface of the reflective layer and the resin layer. and a recessed portion disposed in the recessed portion. It is possible to provide a light unit, a liquid crystal display device, and a vehicle lamp. [Means for solving the problem]

[0004] An illumination device according to an embodiment of the invention includes a substrate, a plurality of light sources disposed on the substrate, a resin layer disposed on the substrate and the plurality of light sources; and a resin layer disposed on the resin layer. a first reflective layer, the resin layer including an emission surface facing the light source, The light exit surface has a plurality of protrusions facing the light sources, and a plurality of protrusions between the plurality of protrusions. a plurality of recessed portions disposed in the recessed portions, The concave surface has a curvature, and the radius of curvature of the concave surface increases in one direction.

[0005] According to an embodiment of the invention, the light exit surface of the resin layer is a first surface, and the resin layer is a second surface facing the first surface; a third surface and a second surface extending from both ends of the first and second surfaces; The resin layer may include four sides, and the length of the third side may be greater than the length of the fourth side. The thickness of the light exit surface may be the same as the thickness of the second to fourth surfaces. , the diameter of the imaginary circle formed by the convex portion becomes larger as it goes toward the fourth surface. The radius of curvature of the largest concave surface may be the same as or may have a difference of 10% or less. Among the convex portions, a first convex portion adjacent to the third surface is formed so as to have a circumference of a virtual circle formed by the first convex portions. The contact area of ​​the protrusion is 1 / 3 or more of the length of the circumference, and the protrusion adjacent to the fourth surface The second protrusion has a contact area with the circumference of a virtual circle formed by the second protrusion, which is 1 / 2 the length of the circumference. The straight line connecting the first convex portion and the convex portion adjacent to the first convex portion may be less than 1 / 3. The interior angle between the second convex portion and the straight line connecting the convex portion adjacent to the second convex portion is an obtuse angle. That's fine.

[0006] According to an embodiment of the present invention, the virtual line connecting the plurality of light sources is formed on the front of the convex portion. The first convex portion adjacent to the third surface and the second convex portion adjacent to the fourth surface are swollen relative to a straight line connecting the first convex portion adjacent to the third surface and the second convex portion adjacent to the fourth surface. The first straight line connecting the centers of the adjacent light sources and the centers of the light sources and the respective convex portions The angle between the adjacent second lines passing through the centers of the imaginary circles may be an obtuse angle. The angle between the first and second lines connecting the light sources increases as it moves toward the fourth surface. The resin layer may include a second reflective layer disposed between the resin layer and the substrate, and the convex portion of the resin layer may include a second reflective layer disposed between the resin layer and the substrate. The substrate and the first and second reflective layers are disposed on the substrate. [Effects of the Invention]

[0007] According to an embodiment of the invention, a lighting module or lighting device having a small thickness and a long length in one direction is provided. The luminous intensity of the emitted light of a line shape having a long length can be improved. According to the method, a resin layer and a light source are disposed between a plurality of reflective layers to provide a linear surface light source. By forming a resin layer covering the light source between the plurality of reflective layers, it is possible to This simplifies the module process, reduces light loss, and improves light efficiency. In addition, the thin lighting module is provided in the form of a line light source, allowing for greater freedom of design. The degree increases.

[0008] According to an embodiment of the invention, the uniformity of the light emitted from the surface light source among the multiple reflective layers is improved. The centers of the light sources and the centers of the imaginary circles forming the convex portions of the resin layer are By being aligned, the uniformity of light along the light emission direction can be improved. According to an embodiment of the invention, the light source and the resin layer are arranged along a virtual curve or diagonal line. By aligning the convex portions in a corresponding manner, the uniformity of light can be improved. The optical reliability of the lighting module according to the embodiment and the lighting device having the same can be improved. A vehicle lighting device, a light unit, and each of the lighting modules according to the embodiments of the present invention can be used. The present invention can be applied to various display devices, surface light source lighting devices, and vehicle lamps. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing a lighting device according to a first embodiment of the invention. [Figure 2] FIG. 2 is a cross-sectional view of the illumination device of FIG. 1 taken along the line BB. [Figure 3] 3 is a cross-sectional view of the illumination device of FIG. 1 taken along the line CC. [Figure 4] FIG. 4 is an example of a plan view of the lighting device of FIG. [Figure 5] FIG. 5 is an example of a plan view of an illumination device according to a second embodiment of the invention. [Figure 6] FIG. 6 is an enlarged view of the first region A1 of the lighting device of FIG. [Figure 7] FIG. 7 is a partial enlarged view of the second region A2 of the lighting device of FIG. [Figure 8] FIG. 8 is an enlarged view of the third area A3 of the lighting device of FIG. [Figure 9] FIG. 9 is a diagram illustrating a recessed portion in the third area A3 of the lighting device of FIG. [Figure 10] FIG. 10 is a diagram illustrating an example in which the light source and the convex portion of the resin layer are aligned in the target direction in the lighting device according to the embodiment of the invention. [Figure 11] 11A and 11B are diagrams illustrating the light output angle at the convex portion according to the position of the light source having a first size in an embodiment of the invention. [Figure 12] 12A and 12B are diagrams illustrating the light output angle at the convex portion according to the position of the light source having the second size in an embodiment of the invention. [Figure 13] FIGS. 13A and 13B are diagrams comparing the output angle according to the position of the light source on an elliptical convex portion that is long in the second direction in an example of the invention. [Figure 14] FIGS. 14A and 14B are diagrams comparing the output angle according to the position of the light source on an elliptical convex portion that is long in the first direction in an embodiment of the invention. [Figure 15] FIGS. 15A and 15B show examples of the embodiment of the present invention in which the position of the light source on the convex portion having an aspherical lens shape is changed. [Figure 16] FIG. 16 is a diagram showing an example in which the protrusions are gradually spaced apart from each other in the second direction in an embodiment of the present invention. [Figure 17] FIG. 17 is a view showing an example in which the protrusions are gradually spaced apart from each other in the second direction in an embodiment of the present invention. [Figure 18] FIG. 18 is a diagram showing an example in which light sources are arranged in a triangular shape in an embodiment of the invention. [Figure 19] FIG. 19 is a diagram showing an example in which light sources are arranged in a triangular shape in an embodiment of the invention. [Figure 20] FIGS. 20A to 20E are diagrams illustrating the path of light depending on the difference in distance between the position of the light source and the center of the convex portion in an embodiment of the invention. [Figure 21] FIG. 21 is a diagram for explaining the light emission angle depending on the position of the convex portion of the resin layer and the light source in an embodiment of the invention. [Figure 22] FIG. 22 is an example of a flexible lighting device in accordance with an embodiment of the invention. [Figure 23] FIG. 23 is an example of a flexible lighting device according to an embodiment of the invention. [Figure 24] FIG. 24 shows an example of a lamp to which the lighting device according to the embodiment of the invention is applied. DETAILED DESCRIPTION OF THE INVENTION

[0010]

[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 for these in the present invention. In detailing the principles of operation for the presently preferred embodiment, the known functions involved will be Or, if it is determined that the detailed explanation of the configuration makes the gist of the present invention more unclear than necessary. In such cases, detailed explanations will be omitted. The terms used below are used in consideration of their functions in the present invention. 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 invention can be used in a variety of lamp devices that require lighting, such as vehicles. 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 invention can be applied to indoor and outdoor advertising devices, displays, 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.

[0011] 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.

[0012] <Lighting equipment> FIG. 1 is a perspective view showing a lighting device according to a first embodiment of the invention, and FIG. 2 is a perspective view showing the lighting device of FIG. 3 is a cross-sectional view of the illumination device of FIG. 1 taken along line CC; and FIG. 4 is a cross-sectional view of the illumination device of FIG. 1 taken along line CC. 2 is an example of a plan view of the lighting device of FIG. 1.

[0013] 1 to 4, a lighting device 200 according to an embodiment of the invention includes a plurality of light sources 100. The light emitted from the plurality of light sources 100 is irradiated by a light source having a line width. The light emitted from the light source 100 is emitted as a surface light source having a line width or a thin height. The lighting device 200 may be a flexible module or a rigid module. The lighting device 200 may be configured to be oriented in at least one of the first and second directions Y and X. The lighting devices 200 can be flat or curved relative to each other in the first direction Y. and two side surfaces that correspond to each other in the second direction X. The line width at 200 is the vertical height and is 3 mm or less, e.g., 3 mm or less. The thickness of the illumination device 200 can be in the range of 2.4 mm to 3 mm. The lighting is provided in modules such as straight, curved or wavy shapes, allowing for freedom in lighting design. The lighting is improved and the lamp is effectively installed in the bracket or housing. The device 200 includes a substrate 210, a light source 100 disposed on the substrate 210, and a light source 100 disposed on the substrate 210. 0 and a resin layer 220 disposed on the light source 100, and a resin layer 220 disposed on the resin layer 220 The lighting device 200 may include a first reflective layer 240 formed on the substrate 210. A second reflective layer 230 may be included between the resin layers 220 .

[0014] The light source 100 is a light source that is oriented in the second direction X or the direction from the third surface S3 to the fourth surface S4. The light sources 100 are arranged in a row. The plurality of light sources 100 may be arranged in two or more rows and in different columns. The light sources 100 are arranged on an elongated straight line or curve. Here, as shown in FIG. 4, the interval G1 between adjacent light sources 100 is the same as The gap G1 may be set to 1 for uniform distribution of light emitted from the light source 100. The gap G1 may be equal to the thickness of the lighting device 200, e.g., the thickness of the substrate 210 may be greater than the vertical distance (e.g., Z1) from the lower surface of the first reflective layer 240 to the upper surface of the first reflective layer 240. For example, if the vertical distance is Z1, the gap G1 may be three times or more the thickness Z1. The gap G1 may be 10 mm or more, for example, in the range of 10 mm to 20 mm. If the distance G1 is greater than the above range, the luminous intensity may decrease. If the area is smaller than the perimeter, the number of light sources 100 increases. The light sources 100 are not arranged on the same straight line, and two adjacent light sources 100 are connected to each other. The line is provided as a virtual curve or a curve with an inflection point. When this is done, the uniformity of the light is improved.

[0015] The illumination device 200 has a maximum length X1 in the second direction X that is longer than a maximum length Y1 in the first direction Y. The lengths in the first and second directions Y and X may be greater than the thickness Z1 or height Z2 in the vertical direction Z. The maximum length X1 in the second direction X may be greater than the number of the light sources 100. The maximum length in the first direction Y can be varied by, for example, 30 mm or more. The length Y1 can be 13 mm or more, for example, in the range of 13 mm to 25 mm. The maximum length Y1 of the lighting device 200 in the first direction Y is the maximum length Y1 of the light source 100 that is diffused. The area is provided taking into consideration the area for protecting the light source 100 from the rear, the area for protecting the rear of the light source 100, and the pattern area. With respect to the maximum length Y1 in the first direction Y, the length of the lighting device on the third surface (for example, S3) and the The lengths on the four sides (for example, S4) may be the same or different from each other.

[0016] The light source 100 is disposed between layers of reflective material that are vertically opposed to each other. The source 100 is located adjacent to one of the vertically opposing layers of reflective material in the region between them. The light source 100 may be arranged so as to be in contact with the supporting members that are vertically opposed to each other. The light source 100 may be disposed between reflective members or layers. The lighting device 200 can emit light in multiple directions. The sides may have the same thickness or height. , sealed by a layer of transparent resin material, the layer of resin material being disposed between layers of reflective material; The reflecting layer or member may be disposed between the supporting member and the reflective layer or member.

[0017] 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 has a plurality of pads in an area corresponding to the light source 100. The circuit pattern on the substrate 210 can be disposed on the top or on both the top and bottom. will be placed in.

[0018] The resin layer 220 is disposed on the light source 100. The resin layer 220 The light sources 100 may be arranged at the sides of the light sources 100, or may be arranged between adjacent light sources 100. The resin layer 220 is disposed on the substrate 210. The resin layer 220 is disposed between the substrate 210 and the first reflective layer 240. The resin layer 220 is disposed between the upper surface of the substrate 210 and the lower surface of the first reflective layer 240. The resin layer 220 surrounds the plurality of light sources 100 arranged on the substrate 210. The resin layer 220 can be a light-transmitting layer. The resin layer 220 may include a glass material as another material. The light sources 100 are arranged in a first row or along an imaginary line in a number of n (n≧2) rows. The thickness of the layer 220 is smaller than the thickness of the lighting device 200, so that the width of the line light That is, the width of the line light source can be made smaller than the thickness of the resin layer 220. The resin layer 220 may have a first surface S1 and a second surface S2, which are arranged opposite to each other. and a third surface S3 and a fourth surface S4 disposed opposite to each other. The first and second surfaces S1 and S2 are arranged to correspond to each other in the first direction Y. The third and fourth surfaces S3 and S4 may correspond to each other in the second direction X. The first and second surfaces S1 and S2 are arranged based on an imaginary line connecting the plurality of light sources 100. The third and fourth surfaces S3 and S4 are arranged to correspond to each other. 00. As another example, as shown in FIG. The first and second surfaces S1 and S2 are extended along an imaginary line, and are arranged with the plurality of light sources 100 as a reference. are arranged opposite each other.

[0019] Each outer surface of the lighting device 200 has the largest thickness within the lighting device 200. The outer surfaces S1, S2, and S3 of the resin layer 220 may be the same. , S4 are perpendicular to the side surfaces of the substrate 210, the second reflective layer 230, and the first reflective layer 240. As another example, the outer surface S1 of the resin layer 220 may be , S2, S3, and S4, at least one of the substrate 210, the second reflective layer 230, and The first reflective layer 240 may be flush with each side of the first reflective layer 240 or may be provided with an inclined surface. The second surfaces S1 and S2 extend in the second direction X from both ends of the third and fourth surfaces S3 and S4. The first surface S1 may include a curved surface facing the second surface S1. The first surface S1 is a surface in the direction in which light is emitted from the plurality of light sources 100, and the second surface S2 is The third surface may be a surface on the opposite side to the direction in which light is emitted from the plurality of light sources 200. S3 may be the outer surface adjacent to the first light source, and the fourth surface S4 may be the outer surface adjacent to the last light source. The plurality of light sources 100 may be arranged between the first surface S1 and the second surface S2. The plurality of light sources 100 are disposed between the third surface S3 and the fourth surface S4. In the resin layer 220, the lengths of the first surface S1 and the second surface S2 in the second direction X are The maximum value of the first surface S1 and the second surface S2 in the second direction X may be greater than the height or thickness. The lengths of the first surface S1 and the second surface S2 may be the same or different. The height or thickness of the third surface S3 and the fourth surface S4 may be the same. The height or thickness in the vertical direction is the same as the height or thickness in the vertical direction of the first surface S1 and the second surface S2. The first surface S1 and the second surface S2 of the resin layer 220 may be aligned in a second direction. 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 direction Y. 111 or exposed in the second direction X from the first end of the third surface S3 and the fourth surface S4. The second surface S2 may be opposite to the rear surfaces of the light sources 100 or opposite to the third surface S3. The third surface may be a surface exposed in the second direction X from the second end of the surface S1 and the fourth surface S4. The fourth surfaces S3 and S4 may be side surfaces different from the first surface S1 and the second surface S2. The rear surface of the light source 100 is the surface opposite to the light emitting portion 111 or the surface corresponding to the second surface S2. It is also possible.

[0020] The light emitting portion 111 of each of the plurality of light sources 100 may correspond to the first surface S1. The light emitted from the light source 100 is emitted through the first surface S1, and a part of the light is The air 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 source 100 is emitted through the first surface S1. In the lighting device 200, the maximum lengths Y1 and X1 in the first and second directions are , may be the maximum length in the two directions Y and X. In this way, the first surface S1 of the resin layer 220 The thickness of the first surface S1 of the resin layer 220 is The thickness of the resin layer 220 may be less than 3 mm. The first surface S1 may be an exit surface through which light emitted from the light source 100 exits. , may be a front surface or an exit surface, and the second surface S2 may be a rear surface or a non-exit surface. The first surface S1 has a vertical plane that is formed along the second direction X with a protrusion P0 and a recess C0. As another example, the first surface S1 is extended in a structure having a bulge in the vertical direction. It may be a curved surface, a sloped structure that protrudes from the top to the bottom, or a slope that protrudes from the bottom to the top. The first surface S1 may have a regular uneven shape or an uneven structure. The first surface S1 may be a side surface on which the structures are arranged. The first surface S1 may be a region having a large surface area. a plurality of convex surfaces S11 and a plurality of concave surfaces S12 respectively arranged between the plurality of convex surfaces S11; The resin layer 220 may include a protruding portion having a convex surface S11 protruding from the first surface S1. The protrusions P0 may be oriented in the direction of the first surface S1 or the direction of emission. The convex surface S11 may be a convex lens surface. The resin layer 220 may be provided as the protrusion P0 on the first surface S1. The concave surface S12 is disposed in the area between the two surfaces. The concave surface S12 may be a concave surface or a flat surface. The resin layer 220 or the lighting device 200 may include a region between the protrusions P0. The recessed portion C0 may include a recessed portion C0 recessed in the direction of the second surface S2 in the region. The recessed portion C0 may overlap the area of ​​the concave surface S12 in the second direction X. The recessed portions C0 are respectively disposed between the third and fourth surfaces S3 and S4. The recessed portion C0 may be a concave surface disposed in an area between the protruding portions P0. The first surface S1 can emit light from the entire area. Therefore, it can be defined as an exit surface. The convex surface S11 and the concave surface S12 are arranged alternately. The protrusions P0 and the recesses C0 are arranged alternately. The surface disposed at the outermost edge in the second direction X may be a part of the convex surface S11. The convex surface S11 extends from the third surface S3 or from the fourth surface S4. The centers of the convex surfaces S11 are located in the first direction Y. The centers of the plurality of protrusions P0 are arranged at positions corresponding to the first centers. The light sources 100 are arranged at positions corresponding to the centers of the light sources 100 in the direction Y. Each of the light sources 100 can overlap with each of the protrusions P0 in the first direction Y. Each of the light sources 100 overlaps with the convex surface S11 in the first direction Y and with the concave surface S12 in the first direction Y. Each of the plurality of light sources 100 is aligned with the recess C0 in the first direction. The height of the convex surface S11 in the vertical direction is equal to the height of the resin layer 220 in the vertical direction. The vertical height of the concave surface S12 may be the same as the thickness of the resin layer 220. The resin layer 220 may cover the light source 100 or may be formed in a mold. Each of the light sources 100 may include a light emitting chip. The light source 100 may include a reflective sidewall, e.g., a body, surrounding the outside of the light-emitting chip. The reflective sidewall has an open area facing the first surface S1 of the resin layer 220. The reflective sidewall is provided as a structure surrounding the light emitting chip. The light source 100 may be provided with a separate reflective material. The other side surfaces may be made of a reflective material or a transparent or opaque material. The resin layer 220 may have a refractive index of 1.70 or less, for example, in the range of 1.25 to 1.70. If the refractive index of the resin layer 220 is outside the above range, the light extraction efficiency may decrease. There is.

[0021] Each of the light sources 100 has a bonding portion disposed at the bottom thereof, and is connected to a pad of the substrate 210 and an electric field. The light sources 100 are electrically connected in series by the circuit pattern on the substrate 210. Alternatively, the optical fibers may be connected in series-parallel, parallel-series, or parallel. The sources 100 are arranged in various interconnected groups according to the circuit pattern on the substrate 210 . The light source 100 is a device having a light emitting chip or a packaged LED chip. The light emitting chip may include a package. The light source 100 can emit at least one of the following colors: white, blue, red, and green. The light source 100 emits light in a lateral direction. The bottom of the light source 100 is disposed on the substrate 210. ) type package. As another example, the light source 100 may be an LED chip. One side of the LED chip may be open and the other side may be provided with a reflective member. The light source 100 may include a phosphor. The light source 100 may include a light emitting chip. The phosphor layer may include a covering phosphor layer or a molding member. The molding member may be a transparent resin portion containing a phosphor. It may be a transparent resin material that does not contain impurities such as phosphors.

[0022] As shown in FIG. 4, the maximum distance between the light source 100 and the first surface S1 is The distance D2 and the distance D3 between the light source 100 and the second surface S2 may be different. The distance D3 between the second surface S2 and the first surface S2 may be 2 mm or more, for example, 2 mm to 2 0 mm. The distance D3 between the light source 100 and the second surface S2 can be If the thickness is smaller than the above range, moisture will penetrate and the area in which a circuit pattern can be formed will become smaller. If the distance is greater than the above range, the size of the lighting device 200 will be large. The maximum distance between the convex surface S11 and the light source 100, or the distance between the light source 100 and the apex of the convex portion P0 The maximum distance D2 may be 5 mm or more, for example, 5 m. The maximum distance may be in the range of 8 mm to 20 mm or in the range of 8 mm to 20 mm. If D2 is smaller than the above range, hot spots may occur. If the number of light sources 100 is small, the module size will be large. The distance D1 between the line connecting the adjacent concave surfaces S12 and each light source 100 is 5 mm. For example, the distance D1 can be in the range of 5 mm to 12 mm. If it is small, the depth D4 of the recess C0 becomes deep or the maximum distance D2 becomes narrow, A dark area may occur in the recessed portion C0. That is, the distance between the line connecting both ends of the convex portion P0 and each light source 100 is If the distance is too close, the light is focused on the center area of ​​the convex surface S11. The light is irradiated onto the reticle 12, and the luminous intensity through the convex surface S11 is reduced. The distance W1 between the recesses C0 or the concave surfaces S12 is the linear distance between the adjacent recesses C0. and may be equal to or smaller than the interval G1 between the light sources 100. If the spacing between the light sources 100 is greater than G1, two or more light sources 100 are provided in the area of ​​the convex portion P0. Although the luminous intensity increases when the distance W1 is If the spacing between the light sources 100 is smaller than G1, the size of the convex portion P0 is small, and therefore the light is not uniform. distribution can be provided, but the luminosity will be reduced.

[0023] The interval W1 between the recessed portions C0 is 15 mm or more, for example, in the range of 15 mm to 20 mm. The interval W1 between the recessed portions CO may be greater than the depth D4 of the recessed portions CO. The ratio of the interval W1 of the recessed portion C0 to the depth D4 of the recessed portion CO may be The depth of the recess C0 may be in the range of 1:0.4 to 1:0.7. If the depth of the recess C0 is smaller than the predetermined range, the dark area between the adjacent protrusions P0 increases. If the distance is greater than the range, the light source 100 advances to the area adjacent to the light source 100. The depth D4 of the recessed portion C0 is set to a value that connects the vertices of the protruding portion P0. The second reflective layer 23 may be a straight line distance between the line and the bottom point of the recessed portion C0. 0 is disposed between the resin layer 220 and the substrate 210. The resin layer 220 is The resin layer 220 may contact the top and side surfaces of the light sources 100. A part of the resin layer 220 may contact the upper surface of the second reflective layer 230. The resin layer 220 can contact the substrate 210 through the holes 30. The first surface S1 of the resin layer 220 can contact the light emitting portion 111 of the light source 100. The second surface S2, the third surface S3, and the fourth surface S4 are located between the first and second reflective layers 240 and 230. The upper surface of the resin layer 220 may be in contact with the first reflective layer 240. The upper and lower surfaces of the resin layer 220 may be in contact with the second reflective layer 230. The lower surface may be a horizontal plane or a curved surface. If not, the bottom surface of the resin layer 220 may be in contact with the substrate 210 .

[0024] The area of ​​the bottom surface of the resin layer 220 may be the same as the area of ​​the top surface of the substrate 210. The area of ​​the lower surface of the resin layer 220 may be the same as the area of ​​the upper surface of the second reflective layer 230 . The upper surface area of ​​the resin layer 220 may be the same as the upper surface area of ​​the first reflective layer 240. The length of the resin layer 220 in the second direction X is the same as the length (for example, X1) of the substrate 210. The maximum length of the resin layer 220 in the second direction X may be The length of the resin layer 220 in the first direction Y may be equal to the maximum length of the first reflective layer 240. The maximum length (for example, Y1) may be the same as the maximum length of the substrate 210. The maximum length (for example, Y1) of the resin layer 220 is the same as the maximum length of the second reflective layer 230. The maximum length (for example, Y1) of the resin layer 220 in the first direction Y may be The minimum length of the resin layer 220 in the first direction Y may be the same as the maximum length of the resin layer 240. The length of the resin layer 220 in the first direction Y may be equal to the minimum length of the substrate 210. The minimum length may be the same as the minimum length of the second reflective layer 230 or the first reflective layer 240. The maximum length Y1 in the first direction Y is the distance between the apex (or highest point) of the convex portion P0 of the lighting device and the second surface The minimum length may be the maximum distance between the bottom point of the concave surface S12 of the lighting device and the It may be the minimum distance between the two surfaces S2.

[0025] A resin layer 220 is disposed in the region between the first and second reflective layers 240 and 230. The first and second reflective layers 240 and 230 have the same area and are formed on the resin layer 220. The upper and lower surfaces of the resin layer 220 can be opposed to each other. The emitted light and the light reflected by the first and second reflective layers 240 and 230 are diffused to form a first surface S The second reflective layer 230 can guide the light from the light source 100 in one direction. The second reflective layer 230 can reflect light emitted from the substrate 210. The second reflective layer 230 may be formed as an upper layer or as a separate layer. The upper surface of the second reflective layer 230 is bonded to the upper surface of the substrate 210 with an adhesive. The second reflective layer 230 is attached to the bottom surface of the light source 100. The light source 100 is connected to the substrate 210 through the holes 232. A portion of the resin layer 220 contacts the substrate 210 through the hole 232. The hole 232 is a hole through which the light source 100 is bonded to the substrate 210. The second reflective layer 230 may be formed as a single layer or a multi-layer structure. The second reflective layer 230 may include a material that reflects light, such as a metal or a non-metal material. When the second 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 second reflective layer 230 may be made of a white resin material or polyester (P The second reflective layer 230 may include a low-reflection film, a high-reflection film, or a reflective film. The reflecting film may include at least one of a diffuse reflection film and a regular reflection film. The second reflective layer 230 is, for example, a specular reflective film for reflecting incident light to the first surface S1. It may be provided as.

[0026] As shown in FIG. 2, the thickness Zc of the second reflective layer 230 is smaller than the thickness Za of the substrate 210. The thickness Zc of the second reflective layer 230 may be 0.5 times the thickness Za of the substrate 210. The second arrangement can reduce the transmission loss of incident light. 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 first reflective layer 240 is disposed on the entire upper surface of the resin layer 220, The resin layer 220 has a thickness greater than that of the light source 100. The thickness of the light source 100 may be Zb. The length may be shorter than the length K1 (FIG. 4) in the second direction X. The thickness of the light source 100 may be 1 mm to 2 mm. The range may be in the range of mm, for example, 1.2 mm to 1.8 mm. A part of the resin layer 220 is disposed between each of the light sources 100 and the first reflective layer 240. As a result, the resin layer 220 protects the upper part of each light source 100 and prevents moisture from penetrating. The light source 100 has a substrate 210 disposed at the bottom and a resin layer 212 disposed at the top. The oil layer 220 can protect the upper and lower parts of each light source 100. Therefore, the distance between the upper surface of the resin layer 220 and the upper surface of each light source 100 is 0.6 mm. The upper part of the resin layer 220 may be arranged in a range of 0.5 mm to 0.6 mm. The light source 100 is extended to the upper part of each light source 100 to protect the upper part of the light source 100. The thickness Zb of the resin layer 220 may be the distance between the upper and lower surfaces of the resin layer 220. The thickness Zb of the resin layer 220 is determined by the vertical distance between the first and second reflective layers 240 and 230. The thickness Zb may be the same as the distance between the first and second reflective layers 240 and 230. The thickness Zb may be smaller than 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 set to a maximum length Y1 and The maximum length Y1 in the first direction Y may include the apex of the protrusion P0. and the second surface S2. The distance or interval between the apex of the protrusion P0 and the second surface S4 is greater than the distance between the apex of the protrusion P0 and the second surface S2. The minimum length in the first direction Y is the linear distance between the concave surface S12 and the second surface S2. The distance or spacing between the second reflective layer 230 and the first reflective layer 240 may be , may be smaller than the distance or interval between the first surface S1 and the second surface S2 of the resin layer 220. The distance between the first and second reflective layers 240 and 230 is set to the first direction of the lighting device 200. By arranging it smaller than the length or minimum width of Y, it can create a line-shaped surface light in the first direction Y. The lighting device can provide a source of illumination, improve luminosity, and prevent hot spots. Alternatively, the flexible member may have a certain thickness and be flexible in the third direction Z. The thickness Zb of the resin layer 220 may be equal to or less than twice the thickness of the light source 100, for example. The thickness Z of the resin layer 220 may be more than 1 time to 2 times the thickness of the light source 100. b is 2 mm or less, for example, in the range of 1.5 mm to 1.9 mm or 1.6 mm to 1.8 mm The thickness Zb of the resin layer 220 can be set to a value smaller than the thickness Z of the lighting device 200. It may be 0.8 times or less of the thickness Z1 of the lighting device 200, for example, 0.4 to 0. The resin layer 220 may have a thickness Z1 of the lighting device 200 and a thickness Z2 of the lighting device 200. Since they are arranged with a difference of 1.2 mm or less, a decrease in the light efficiency of the lighting device 200 can be prevented. 4, the second light source 100 can be made to have a flexible property. The length K1 in the direction X can be 2 mm or more, for example, in the range of 2 mm to 7 mm. The length K1 of each light source 100 is the length of the long side, and is shorter than the width of each convex portion 100. and may be greater than the thickness of the light source.

[0027] The thickness Zb of the resin layer 220 is the length or maximum length of each light source 100 in the second direction X. The thickness Zb of the resin layer 220 is the maximum thickness of the convex surface S11 in the second direction X. That is, the thickness Zb of the resin layer 220 may be smaller than the maximum length. The first surface S1 provides a surface light source having a line shape, for example, a line width of 3 mm or less. The convex surface or the convex surface S11 of the convex portion P0 may have a first curvature. The concave surface S12 may be flat or may have a curvature greater than the first curvature. Here, the curvature radius of the convex portion P0 is 5 mm or more, for example, in the range of 5 mm to 15 mm. In other words, the imaginary circle formed by the convex portion P0 may have a width in the range of 8 mm to 11 mm. The radius of curvature is 5 mm or more, for example, in the range of 5 mm to 15 mm or in the range of 8 mm to 11 mm. When the curvature radius of each of the convex portions P0 is smaller than the above range, the luminous intensity The improvement is slight, and if it is greater than the range, dark areas may occur.

[0028] At least one or more radii of curvature of the concave surface S12 are equal to or greater than the curvature of the convex portion P0. The radius of curvature of the concave surface S12 and the radius of curvature of the convex portion P0 may be 0.12 times or less. The ratio of the curvature radius of the concave surface S12 may be in the range of 1:8 to 1:28. If the radius is smaller than the range, the amount of light emitted through the concave surface S12 decreases and the dark area increases. If the value is larger than the range, the size of the convex portion P0 becomes small, and the size of the light source 100 Therefore, the depth D4 and the radius of curvature of the concave surface S12 are , taking into consideration the position of the light source 100 and the directivity angle of the light source 100, the convex portion P0 and the To improve the uniformity of light through the recessed portion C0 and to suppress dark areas in the recessed portion C0 The radius of curvature of the concave surface S12 can be in the range of 1.2 mm or less, for example, 0. The concave surface S12 may have a predetermined curvature in the range of 5 mm to 1.2 mm. By providing the device in a curved shape, it is possible to refract and transmit incident light, and the This can reduce the occurrence of dark areas in the C0 region of the black matrix.

[0029] Meanwhile, the resin layer 220 is made of silicone, silicone molding compound (SMC) ), 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. The main material of the resin layer 220 is a resin material whose main ingredient is urethane acrylate oligomer. For example, a synthetic oligomer, such as a urethane acrylate oligomer, can be used. It is possible to use a mixture of polyacrylic and polyacrylic polymers. Here, IBOA (isobornyl acrylate), HPA (Hydroxypropyl acrylate), which are low-boiling point dilutable reactive monomers, are used. It also contains mixed monomers such as 2-hydroxyethyl acrylate and 2-HEA (2-hydroxyethyl acrylate). It can be used with a photoinitiator (e.g., 1-hydroxycyclohexyl phenyl-ketone) or The resin layer 220 may contain beads (not shown). The beads may include a diffusing and reflecting element (not shown), which diffuses and reflects incident light to reduce the amount of light. The resin layer 220 may include a phosphor. may include at least one of yellow, green, blue, and red phosphors. The region of the resin layer 220 where the convex portion P0 is formed may be provided as a lens portion. The lens portion of the resin layer 220 is provided in a lens shape having a convex surface, and is In some cases, the shape may include a hemispherical, semicircular, semi-elliptical, or aspherical shape. The lens may include a collimator lens. The closer the vertex is to the center of the light source 100, the farther the distance from the light source 100 is. The thickness of the lens portion in the third direction Z may be the thickness of the resin layer 220. Such a lens portion has flat upper and lower surfaces and is formed by a curved surface in the direction of the first surface S1. The lens portion can diffuse light incident in the direction of the first surface S1. The first and second reflective layers 240 and 230 are disposed between the first and second reflective layers 240 and 230, respectively, and refract light to the first surface S1. The lens portion can emit light in a region deviated from the optical axis. The illumination device 20 can refract incident light to an exit angle greater than the incident angle. When the resin layer 220 has a bend due to its flexible property, the first and second reflective layers 240, 230 may include uneven curved regions.

[0030] Therefore, each of the convex surfaces S11 of the resin layer 220 is The resin layer 220 can emit light emitted from the protrusions P0. The recess C0 is provided as a recess recessed in the direction of the second surface S2. The recessed portion C0 of the resin layer 220 is formed on the concave surface S12 of the resin layer 220. The light emitted from each light source 100 through the recessed portion C0 from the region between the protruding portions P0 is Since the light emitted from the recessed portion C0 is reflected by the recessed portion C0, the occurrence of dark areas can be reduced. When the convex portion P0 and the recess portion C0 are arranged in the resin layer 220, the substrate 210 The first and second reflective layers 240 and 230 are formed such that one side of the reflective layer faces the convex portion P0 and the concave portion C0. The convex portion P0 or the lens portion of the resin layer 220 is provided in a corresponding shape. The number of the first reflective layer 240 may be the same as the number of the second reflective layer 230. The first reflective layer 240 may be made of the same material as the first reflective layer 240. The second reflective layer 230 has a higher light reflectivity or a greater thickness than the second reflective layer 230. The first reflective layer 240 may have a thickness Zc equal to or greater than the thickness Zc of the second reflective layer 230. For example, the first and second reflective layers 240 and 230 may be of the same thickness. The thickness Zd of the first reflective layer 240 may be the same as that of the substrate. The thickness Zd of the first reflective layer 240 may be equal to or smaller than the thickness Za of the first reflective layer 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, and incident light is The thickness Zd of the first reflective layer 240 is 0.2 mm. If the thickness is smaller than this range, light transmission loss occurs. If the thickness is greater than this range, the thickness Z1 of the lighting device 200 increases. The first reflective layer 240 may be formed as a single layer or a multi-layer structure. The first reflective layer 240 may be made of a metal or a non-metallic material. If the coating is made of a material, it may contain a metallic layer such as stainless steel, aluminum (Al), or silver (Ag), and may be made of a non-metallic material. In the case of the metallic material, the first reflective layer may include a white resin material or a plastic material. The layer 240 may include a white resin material or a polyester (PET) material. The layer 240 may be a low reflection film, a high reflection film, a diffuse reflection film, or a specular reflection film. The first reflective layer 240 may include at least one of the following: The first and second surfaces may be provided as specular reflective films so as to travel in the direction of the first surface S1. The reflective layers 240 and 230 may be made of the same or different materials. The first and second reflective layers 240 and 230 include the convex portions and the recessed portions of the resin layer 220. That is, the substrate 210 and the first and second electrodes are formed on the upper and lower surfaces of the protrusion P0 of the resin layer 220. The protrusions of the second reflective layers 240 and 230 are disposed on the recesses of the substrate 210 and the The recessed portions of the first and second reflective layers 240 and 230 are disposed on the substrate 210. The laminated structure of the second reflective layer 230, the resin layer 220, and the first reflective layer 240 is The protrusion P0 can have the same structure as the recess C0. The upper and lower surfaces may be flat, and may have a curved or hemispherical shape in the first direction Y. The recessed portion C0 may include a flat or concave curved surface in the direction of the second surface S2. At least one or both of the convex surface S11 and the concave surface S12 in the layer 220 are It can be processed into a haze surface or prism shape to diffuse light. The surface of the resin layer 220 is rougher than the inner surface of the resin layer 220, and the light emitted from the surface of the resin layer 220 is diffused. This can be done.

[0031] Here, as shown in FIG. 4, in the area of ​​the imaginary circle Vc formed by each of the convex portions P0, That is, the maximum distance D between the convex portion P0 and the light source 100 is The diameter r2 may be smaller than the diameter r0 of the virtual circle Vc. The directivity angle distribution of light through each convex part P0 arranged on an imaginary circle satisfying the maximum distance D2 is This allows more light to be focused on the target area or in the direction of light travel. The lighting device 200 according to the embodiment of the invention provides a thickness Z1 in the third direction Z in the form of a line. This allows for greater freedom in the design of the line light source and provides stable illumination. The thickness Z1 of the lighting device 200 can be improved by 300 times. mm or less, for example, 3 mm or less, or may range from 2.4 mm to 3 mm. In addition, the thickness of the resin layer 220 is provided to be less than 3 mm, for example, in the range of 1.5 mm to 1.9 mm. In other words, the width of the line-shaped surface light source can be narrower. The device 200 may be arranged in the range of 2 mm to 6 mm, in which case the thickness of the resin layer 220 By providing a thicker thickness, the line width can be increased, and the light distribution area can be increased. The lighting device 200 having an in-light source is applied to a vehicle lamp, for example, a side lamp, a parking lamp, a side lamp, a Mirror lights, fog lights, tail lights, brake lights, auxiliary brake lights, turn signals, position lights Daytime running lights, vehicle interior lighting, door scuffs, rear combination lamps (R CL), backup lamps, room lamps, and dashboard lighting can be selectively applied. The rear combination lamp may include a brake light, a tail light, a turn signal light, and a backup light. It can include an up ramp. Turn from the ramp according to the car line. It can be provided as a linear lamp.

[0032] The lighting device disclosed in the first embodiment has a plurality of light sources 100 arranged on the same straight line, The line-shaped surface light source emitted through each of the protrusions P0 is irradiated forward. In this case, when the virtual line connecting each convex portion P0 faces the target area, The target area at this time is arranged at equal intervals from each of the convex portions P0. For example, the target area may be a linear structure, such as a lens, e.g., an inner The number of light sources 100 is determined by the number of convex portions P0. They may be the same, and may be two or more, for example, 2 to 100 or 3 to 100, in the second direction X. In other words, two or three may be arranged between the third surface S3 and the fourth surface S4. The number of light sources 100 arranged is determined depending on the installation environment and the target. It can be changed by lighting.

[0033] On the other hand, the object to be illuminated by the lighting device, i.e., the run of the target area (e.g., car line) If the spline is provided as a curved or bent line, it is The virtual line or the virtual line connecting multiple light sources is connected to the lamp line of the target area. The second embodiment is a modification of the first embodiment. This is an example in which the positions of the light source and the convex portions are modified. For the same configuration as the first embodiment, please refer to the description of the first embodiment.

[0034] FIG. 5 is a plan view of an example of an illumination device according to a second embodiment, and FIG. 6 is a plan view of the illumination device of FIG. 5. FIG. 7 is an enlarged view of a first area A1 of the lighting device of FIG. 5. FIG. 8 is an enlarged view of a second area A2 of the lighting device of FIG. 5. 8 is an enlarged view of the third region A3 of the lighting device of FIG. 5. The lighting device shown in FIGS. 1 is a plan view seen from above the resin layer 220 or the first reflective layer 240.

[0035] 5 to 8, the lighting device 200 includes a substrate 210, a light source 100, and a , the first reflective layer 240 and the resin layer 220. The second reflective layer 230 is disposed between the substrate 210 and the second reflective layer 230. The first and second reflectors can reflect light traveling toward the substrate, and may be removed. The layers 240 and 230 reflect the light emitted through the plurality of light sources 100 in the resin layer 220. The resin layer 220 guides the light and emits it through the first surface S1. In the device 200, the plurality of light sources 100 are connected in a direction from the third surface S3 to the fourth surface S4. The lines are arranged along a virtual curve Vc0. The virtual curve Vc0 is a line that is arranged along the virtual curve Vc0. 00. The virtual curve Vc0 passes through the center of each light source 100. The virtual curve Vc0 is a curve of the first light source 101 ( 109 (hereinafter referred to as the ninth light source) and the center of the last light source 109 (hereinafter referred to as the ninth light source) are connected. The first surface may be bulged or have a positive curvature with respect to the straight line L9. The imaginary line passing through the source 100 corresponds to the straight line connecting the first light source 101 and the ninth light source 109. The light source 100 has a curved line that bulges outward and bulges in the direction of the first surface S1. A part of the imaginary line passing through the second plane S2 is disposed behind the second plane S2.

[0036] The third surface S3 is provided to the plurality of convex portions P0 along the arrangement direction of the plurality of light sources 100. The line connecting the fourth surface S4 is arranged along the virtual curve Vc0. The first surface S1 of the resin layer 220 may include a plurality of protrusions P0 and a plurality of recesses C0. The first surface S1 having the protrusion P0 and the recess C0 may be an emission surface. That is, the first surface S1 of the resin layer 220 may be an emission surface. The first surface S1 or the exit surface can include a convex surface S11 and a concave surface S12. The concave surface S12 is the outer surface of the convex portion P0, from which most of the light is emitted. 1 and 2, the substrate 210, the first reflective layer 212, and the concave surface 214 are arranged in a plane parallel to each other. 240, the second reflective layer 230 has the same shape as the convex portion P0 and the recessed portion C0 of the resin layer 220. Such a configuration can include the same structure of convex portions and recessed portions as that described with reference to FIGS. I will refer to it.

[0037] Here, the first convex portion P1 corresponding to the first light source 101 is used as a reference, and two adjacent convex portions are A straight line L1 passing through the ninth light source 109 and a straight line L2 passing through two adjacent convex portions are used as a reference. The interior angle Q2 between the center region A and the center region B may be an obtuse angle. The angle Q1 with the line L3 passing through two adjacent convex portions arranged on the Here, the straight line L2 connecting the outermost convex portions is in the second direction X The interior angle Q2 may be set at an angle of 70 degrees or less based on the line. It can have a range of 50 degrees, depending on the line of the applicable lamp housing or bracket. It can be changed.

[0038] Here, the plurality of light sources 100 are located on the imaginary curve Vc0. The centers of the two adjacent light sources 10 are located on the imaginary curve Vc0. The distances G1 and G2 between the two straight lines perpendicular to 0 may be the same. Each straight line perpendicular to the light source 100 is perpendicular to the long side of the light source 100. The line perpendicular to the light source 100 passes through the center of the light source 100. On the other hand, it may be extended in the optical axis direction or the normal direction. The intervals G1 and G2 are arranged identically for uniform light distribution, but they can be arranged at different intervals. For example, the interval G2 between light sources (such as 109) that are relatively far from the straight line L3 in the center region can be arranged narrower than the interval G1. That is, for the uniformity of light, the intervals G1 and G2 of the light sources can be the same as each other or can be made narrower in a partial region (such as A3) based on the center region (such as A2), or can be made wider in a specific region (such as A1). For example, the difference in the intervals between two light sources adjacent to the third and fourth surfaces S3 and S4 can have a difference within 10%. When the difference in such intervals exceeds 10%, the difference in the uniformity of light between the light sources adjacent to the third and fourth surfaces S3 and S4 becomes large, and there is a problem of an increase in the number of light sources. In the lighting device, each of the plurality of light sources 100 is arranged with an inclination or tilt with respect to the first or second direction Y, X. That is, the central axis direction of each light source 100 is arranged to be inclined with respect to the first direction Y. As a result, the intervals G3 and G4 between the straight lines extending the long sides of two adjacent light sources can be horizontal intervals, being the smallest in the direction of the third surface S3 and gradually increasing in the direction of the fourth surface S4. That is, the intervals can satisfy G3 < G4. The long side of the light source 100 may be the side surface where the light emitting portion 111 (see FIG. 2) is arranged or the opposite rear surface Sb (see FIG. 6). That is, the light source 100 is such that the horizontal interval G3 between two adjacent light sources 100 gradually increases from the first light source 101 towards the fourth surface S4. The interval Gd between the vertical straight lines between two adjacent light sources 100 is the same as each other

[0039] In the lighting device, each of the plurality of light sources 100 is arranged with an inclination or tilt with respect to the first or second direction Y, X. That is, the central axis direction of each light source 100 is arranged to be inclined with respect to the first direction Y. As a result, the intervals G3 and G4 between the straight lines extending the long sides of two adjacent light sources can be horizontal intervals, being the smallest in the direction of the third surface S3 and gradually increasing in the direction of the fourth surface S4. That is, the intervals can satisfy G3 < G4. The long side of the light source 100 may be the side surface where the light emitting portion 111 (see FIG. 2) is arranged or the opposite rear surface Sb (see FIG. 6). That is, the light source 100 is such that the horizontal interval G3 between two adjacent light sources 100 gradually increases from the first light source 101 towards the fourth surface S4. The interval Gd between the vertical straight lines between two adjacent light sources 100 is the same as each other and can satisfy G3 < G4. The long side of the light source 100 may be the side surface where the light emitting portion 111 (see FIG. 2) is arranged or the opposite rear surface Sb (see FIG. 6). That is, the light source 100 is such that the horizontal interval G3 between two adjacent light sources 100 gradually increases from the first light source 101 towards the fourth surface S4. The interval Gd between the vertical straight lines between two adjacent light sources 100 is the same as each other and can satisfy G3 < G4. The long side of the light source 100 may be the side surface where the light emitting portion 111 (see FIG. 2) is arranged or the opposite rear surface Sb (see FIG. 6). That is, the light source 100 is such that the horizontal interval G3 between two adjacent light sources 100 gradually increases from the first light source 101 towards the fourth surface S4. The interval Gd between the vertical straight lines between two adjacent light sources 100 is the same as each other and can satisfy G3 < G4. The long side of the light source 100 may be the side surface where the light emitting portion 111 (see FIG. 2) is arranged or the opposite rear surface Sb (see FIG. 6). That is, the light source 100 is such that the horizontal interval G3 between two adjacent light sources can gradually increase from the first light source 101 or have a spacing difference of less than 10%. This allows for a line of vehicle lamps When lighting devices are installed along the line, it is possible to have a uniform distribution of surface light sources on each line. The lighting device is provided as a line light source with a thickness of 3 mm or less, and is flexible or is provided as a non-flexible line light source.

[0040] The light source 100 is placed on a virtual curve Vc0. The light sources 100 are arranged on a line connecting the centers of the light sources 100. The line connecting two adjacent light sources has an inclination with respect to the first or second direction Y or X. In the illumination device 200, in the regions close to the edges (e.g., A1, A3), The straight line connecting two adjacent light sources in the plurality of light sources 100 is in the first and second directions. The inclinations may be different from each other based on Y and X. The slope of the line connecting the two light sources adjacent to the third surface S3 is As another example, the two adjacent light sources 100 may be connected. At least two of the lines may have the same slope. At least one or more of the lines connecting the two adjacent light sources 100 are mutually Therefore, two adjacent light sources in the lighting device 200 can have different inclinations. The slope of the line connecting the light sources differs depending on the areas A1, A2, and A3 of the light source 100. That is, adjacent light sources 10 in each of the areas A1, A2, and A3 of the lighting device can be The slopes of the lines connecting the zeros can be different from each other. For example, the first The area A1 is an area where the light sources of the first group are arranged adjacent to the third surface S3, and The second area A2 is an area where the second group of light sources on the center side are arranged, and the third area A The area 3 may be an area adjacent to the fourth surface S4 where the light sources of the third group are arranged. The slopes of the lines connecting the light sources of the first to third groups may be different. The number of light sources may be the same or different. The slope becomes larger as you move towards the first area A1, and becomes larger as you move towards the third area A3. The increase rate is third greater than the increase rate of the slope of the straight line extending from the second area A2 to the first area A1. The slope of the line extending into the first region A1 may increase. For example, when the lighting device is applied to a lamp of a vehicle, the lamp closest to the center of the front or rear of the vehicle The third area A3 is the area closest to the front or rear corners of the vehicle. good.

[0041] The convex portion P0 has at least one of a hemispherical shape, a semi-elliptical shape, and a shape having an aspherical surface. The imaginary circle Vc formed by the convex portion P0 may have a circular shape, an elliptical shape, an aspherical shape, or the like. The concave surface between the protrusions P0 may include at least one of a ring shape having a concave surface between the protrusions P0. The radius or degree of curvature of S12 may be different for each of the regions A1, A2, and A3. The radius of curvature of the concave surface S12 in A1, A2, and A3 is gradually increasing in one direction or toward the fourth surface S4. The curvature of the concave surface S12 may become smaller in one direction or toward the fourth surface S4. The curvature or the difference in the radius of curvature between the convex portion P0 or the convex surface S11 and the concave surface S12 may be may be maximum in a region close to the third surface S3 and minimum in a region close to the fourth surface S4. In the lighting device, the maximum length Y1 of the third surface S3 is greater than the length Y2 of the fourth surface S4. This is because the circuit patterns and connectors are located behind the first and second areas A1 and A2 in the lighting device. By placing a component such as a fin, the length Y4 of the fourth surface S4 can be further reduced. A through hole H1 is provided in the lighting device 200, and a mounting member such as a screw can be attached. The second surface S2 of the lighting device 200 has a portion protruding rearward along a predetermined curve, For example, a connector may be provided to connect the parts.

[0042] 6 and 5, in the illumination device 200, the plurality of protrusions P0 are arranged on the first light source 10. a first convex portion P1 facing the second light source 102; a second convex portion P2 facing the second light source 102; The light source 100 may include a third protrusion P3 facing the light source 103. It may include first to third light sources 101, 102, 103 or first to third light emitting elements. The first to third light sources 101, 102, and 103 are arranged on a virtual curve VcO. The point where the virtual curve Vc0 touches or intersects with the first light source 101 is the first ground. The point Pa is the point where the light source 102 contacts or intersects with the second light source 102, and the point Pb is the second point. The point where the light source 103 contacts or intersects with the third light source 103 may be a third point Pc. The first to third convex portions P1, P2, and P3 are formed according to the curvatures of the third convex portions P1, P2, and P3. At this time, a virtual circle Vc is formed by the first point Pa and the first convex portion P1. A virtual first straight line Ya passing through the center Px of the circle Vc, the second point Pb, and the second convex portion P2 The second imaginary straight lines Yb passing through the center Px of the imaginary circle Vc may be parallel to each other. The line Yb is a virtual third line Y passing through the third point Pc and the center Px of the virtual circle of the third convex portion P3. c may be parallel to each other. That is, the straight lines passing through the centers of each of the light sources 100 and the centers Px of the virtual circles Vc having the curvature of the convex portions may be parallel to each other. The first point Pa may be the point where the center of the first light source 101 intersects the virtual curve Vc0. The second point Pb may be the point where the center of the second light source 102 intersects the virtual curve Vc0. The first tangent Vt1 intersecting the virtual curve Vc0 at the first point Pa and the first straight line Ya may form a first angle V1, which may be a first obtuse angle. The second tangent Vt2 intersecting the virtual curve Vc0 at the second point Pb and the second straight line Yb may form a second angle V2, which may be a second obtuse angle. The third tangent Vt3 intersecting the virtual curve Vc0 at the third point Pc and the third straight line Yc may form a third angle V3, which may be a third obtuse angle. The first to third angles V1, V2, V3 may be obtuse angles and may be different from each other. For example, the magnitudes of the first to third angles V1, V2, V3 may satisfy the relationship V1 < V2 < V3. That is, each of the straight lines passing through the centers of each of the light sources 100 and each convex portion P0 (for example, Px) and each of the tangents formed by the tangents at the points where each of the plurality of light sources contact the virtual curve may increase as going in one direction or the fourth surface direction, or may include a region where the angle increases. The increasing region may be at least one or all of the first to third regions A1, A2, A3. The first to third tangents Vt1, Vt2, Vt3 may be tangents to the virtual curve Vc0 at the centers of the first to third light sources 103, or may be a straight line connecting the adjacent first and second light sources 101, 102, a straight line connecting the second and third light sources 102, 103, or a straight line connecting the third light source 103 and an adjacent light source. That is, the first to third ​​ Three tangent lines Vt1, Vt2, and Vt3 connect the two adjacent light sources 101, 102, and 103. The line may be extended in the same direction as the connecting line.

[0043] A part of the light source 100 is located on the imaginary circle Vc or circumference forming each of the convex portions P1, P2, and P3. For example, at least a part of the first light source 101 passes through the first convex portion P1. At least a part of the second light source 102 is arranged within the imaginary circle Vc. At least a part of the third light source 103 is disposed within the third convex portion P The convex portions P1, P2, and P3 are arranged within an imaginary circle Vc passing through the imaginary circle Vc. can pass through each of the light sources 100 facing the respective convex portions P1, P2, and P3. The circumference of the imaginary circle Vc forming the respective convex portions P1, P2, and P3 and the respective light sources 100 or light emitters The light sources 100 or light emitting elements are arranged so as to overlap or pass through each other. At least one of them overlaps the circumference of the imaginary circle Vc that forms each of the protrusions P1, P2, and P3. The curvature of each of the protrusions P1, P2, and P3 is set to the curvature of the virtual circle Vc. The maximum width of each of the protrusions P1, P2, and P3 may be the same as the ratio of the imaginary circle Vc. The diameter of each of the protrusions P1, P2, and P3 and the light source 10 may be equal to or larger than the diameter r0. The maximum distance D2 between the first region A and the second region A may be smaller than the diameter r0 of the imaginary circle Vc. 1, the maximum distance D2 between each of the convex portions P1, P2, and P3 and the light source 100 is , P2, P3. Here, the circle formed by the convex portions P1, P2, P3 The diameter r0 of Vc may be greater than the thickness Zb of the resin layer 220 disclosed in FIG. The first to third straight lines (Ya, Yb, Yc) passing through the vertices Pp of the first to third convex portions P1, P2, P3 are The first to third convex portions P1, P2, and P3 are arranged in the normal direction with respect to the tangent line Lt at the vertices Pp thereof. The light beam may extend in the direction of the arrow B and have an angle Q3 of 90 degrees. The light source 10 can be set in consideration of the directional characteristics and the target area. 0 is arranged at a tilted or oblique angle with respect to the first direction Y or the second direction X, e.g. For example, the angle Q4 is set to be less than 90 degrees with respect to the first direction Y. The angle Q4 is set to be 45 degrees or more. Each of the plurality of light sources 100 may be tilted at the angle Q4. However, they may be arranged so as to be gradually shifted in the second surface direction. The bottom of the concave surface S12 disposed between the convex surfaces S11 can be changed depending on the surface of the bracket. The bottom point of the concave surface S12 can be spaced apart from the imaginary curve Vc0. The apex of the convex portion S11 may be the point closest to the second surface S2 within the concave surface. It may be the most protruding point or the point farthest from each light source 100. When the distance between the first light source 101 and the bottom point of the concave surface S12 is considered, The bottom point (or center) of the recessed portion C0 is closer to the first light source 101 than to the second light source 102. The bottom point of the concave surface S12 between the second light source 102 and the third light source 103 may be (or center) may be arranged so as to be closer to the third light source 103 than to the second light source 102. That is, the concave surface disposed between the two light sources 100 on the third surface S3 facing the fourth surface S4. The bottom point or center of S12 is closer to the fourth surface S4 direction than the light source 100 adjacent to the third surface S3 direction. 100. The light source 100 may be adjacent to the light source 100.

[0044] 5 and 7, the convex portion P0 in the second region A2 is, for example, the fourth to sixth convex portions. P4, P5, P6, the light source 100 is, for example, the fourth to sixth light sources 104, 105, 106. The height D4 of the protrusions P4, P5, and P6 in the second region A2 is defined as Between the line L3 connecting the two adjacent convex portions and the two adjacent light sources 104, 105, and 106 The protrusions P4, P5, The height D4 of P6 is smaller than the diameter r0 of the imaginary circle Vc that forms the respective convex portions P4, P5, and P6. The depth D2 of the recess C0 or the depth of the concave surface S12 may be smaller than the depth D2 of the convex portions P4 and P5. , the distance from the apex of P6 to the bottom of the concave surface S12, and the depth in the second area A2 is the deepest. The maximum depth of the recessed portion C0 may be large and the depth in the third region A3 may be smallest. is the distance D2 between the apex of the fourth to sixth convex portions P4, P5, and P6 and the bottom point of the recess portion C0. The depth of the recess C0 may be greater than the diameter r0 of the imaginary circle Vc. The depth in the third region A3 may be the smallest and the depth in the second region A2 may be the largest. The depth of the recess C0 is determined by the slope of the line connecting two adjacent light sources 100. The concave surface S12 disposed in the recessed portion C0 is inversely proportional to the fourth and fifth optical elements. The light sources 104 and 105 are disposed between the fifth light source 105 and the sixth light source 106, respectively. The third surface S3 may be disposed between the two light sources 104, 105, and 106 facing the fourth surface S4. The bottom point or center of the concave surface S12 is located at a distance from the fourth light source 104 adjacent to the third surface S3. The convex surface S11 may be adjacent to the fifth light source 105 adjacent to the fourth surface S4. The extension Sc arranged in the direction of the fourth surface S4 with respect to the fourth light source 104 is 104 and is disposed in the direction of the fourth surface S4 with respect to the fifth light source 105. The extension Sc of the convex surface S11 can correspond to the fifth light source 105. Since the extension portion Sc is further extended in the direction of the second surface S2, the adjacent light sources 104, 105, 106, The fourth to sixth light sources 104, 105 can be arranged adjacent to each other. The imaginary curve Vc0 or straight line Vt5 connecting the centers of the 106 and 106 has a line tangent to the concave surface S12. This allows the fourth to sixth light sources 104, 105, and 106 to be in contact with each other. The light emitted from the light source can be blocked from being emitted through the convex portion of another light source. The extension portion Sc is a region of the convex surface S11 that is outside the region of the imaginary circle, and is located on the concave surface S The fourth to sixth convex portions P4, P5, and P6 are provided as straight or flat sections. The line Vx1 connecting the center Px of the imaginary circle Vc is the line Vt5 connecting the light sources. The protrusions P4, P5, and P6 are located between the straight line L3 connecting the vertices of the protrusions P4, P5, and P6. The line L3 may be parallel to the line Vx1 and the line Vt5. A straight line Vx1 connecting the center Px of the virtual circle Vc in the areas A1 and A2 is As shown in FIG. 8, in the third area A3, the virtual The straight line Vx2 connecting the centers Px of the circles Vc is closer to the second surface than the straight line connecting the concave surfaces S14. It is placed close to the direction.

[0045] As shown in FIG. 7, the distance D between the concave surface S12 and the line connecting the center Px of the virtual circle Vc The distance D5 may be smaller than the radius r1 of the virtual circle Vc. The structure takes into consideration the directivity angle distribution of the light sources 104, 105, and 106, and the half of the virtual circle Vc If the diameter is larger than r1, the rigidity of the module will decrease due to the increased depth of the recess C0. The light blocking effect between adjacent light sources is minimal. A line Y1a passing through the center Px and the center of the fourth light source 104, and a virtual circle V passing through the fifth convex portion P5 The center Px of the fifth light source 105 and the line Y1b passing through the center of the fifth light source 105 may be parallel to each other. At this time, the distance D6 between two adjacent imaginary circles Vc is greater than the minimum width of the recess C0. Here, the minimum width of the recess C0 is the minimum distance between two adjacent surfaces S11. The light source 100 (104, 105, 106) may be the minimum width of the concave surface S12. The distance r2 between the center Px of the virtual circle Vc and the point 06) is smaller than the radius r1 of the virtual circle Vc. The distance r2 may be smaller than the distance r1 between each light source and the circle at each convex portion P0. The distance between the centers Px can be set to the same value to ensure uniformity of light. The radius r1 of the imaginary circle Vc formed by the convex portion P0 is 5 mm or more, for example, 5 mm to 15 mm. The adjacent light sources 104, 105 may have a range of 8 mm to 11 mm. , 106, the angle V4 between the lines Y1a and Y1b is obtuse. The angle V4 may be larger than the angles V1, V2, and V3 in FIG. good.

[0046] Referring to FIG. 8 and FIG. 5, in the third area A3 adjacent to the fourth surface S4, a virtual convex portion is formed. The lines Y2a, Y2b, and Y2c passing through the center of the circle Vc and the center of each light source 108 are parallel to each other. Here, the imaginary line Vt6 connecting the adjacent light sources 108 is the line Y2a Angle V5 between Y2b and Y2c may be an obtuse angle. Here, the angle between the seventh to the convex portion C0 adjacent to the fourth surface S4 may be larger than the angle V4. The ninth protrusions are called P7, P8, and P9, and the recess C0 is called the seventh and eighth recesses C7 and C8. The center Px of the imaginary circle VcX passing through the ninth convex portion P9 and the ninth light source 10 A straight line Y9a passing through the center of the lens 9 may be parallel to the straight lines Y2a, Y2b, and Y2c. The straight line Vx2 connecting the center Px of the imaginary circle VcX is the recessed portion C0 or the concave surface S14. Here, two adjacent protrusions adjacent to the fourth surface S4 can be gradually separated from each other. The eighth recessed portion C8 between the portions P8 and P9 may form an imaginary circle Vs2. The diameter of the imaginary circle Vs2 is equal to or smaller than the diameter of the imaginary circle VcX that forms each of the protrusions P8 and P9. For example, the imaginary circle Vs2 formed by the concave surface S14 of the recessed portion C8 is The imaginary circle VcX formed by 9 is provided with a curvature whose difference from the diameter of Vc is 10% or less. That is, the curvature of the ninth protrusion P9 and the curvature of the eighth recess V8 are the same or different. The difference between the ninth convex portion P9 and the ninth light source 109 may be 10% or less. The distance D21 may be smaller than the diameter of the virtual circles Vs2 and VcX. The source 109 is arranged within the circumference of the imaginary circle VcX, and the curvature of the concave surface S14 of the eighth recess C8 is When the diameter is maximum, the distance D21 is the diameter of two adjacent imaginary circles Vs2 and VcX. The radius of curvature of the concave surface S14 in the region adjacent to the ninth convex portion P9 may be smaller than the radius of curvature of the concave surface S14 in the region adjacent to the ninth convex portion P9. By providing a larger amount of light, the light emitted from the light sources 108 and 109 arranged in the third area A3 can be reduced. In an embodiment of the invention, the light is emitted from the third surface S3 to the third surface S4. The curvature of the concave surface S14 or the curvature of the recessed portions C7 and C8 gradually decreases in the direction of the fourth surface S4. or the curvature of the concave surface S14 or the recessed portion C8 adjacent to the fourth surface S4 becomes larger than the concave surface or recessed portion C8. The curvature of the recessed portion may be the largest. This is because the area of ​​the convex portion decreases as it approaches the third region. The third region A3 may be the largest or the largest in the second direction X. By gradually moving in the second surface direction as a convex portion, the curvature of the connecting section of the convex portion gradually becomes smaller. That is, the radius of curvature of each concave surface S14 or recessed portion C0 (C7, C8) is equal to that of the fourth surface S It gradually gets larger as it gets closer to 4.

[0047] 8 and 9, the final ninth protrusion P9 and the seventh and eighth protrusions P Looking at P7 and P8, the center Px of an imaginary circle passing through the seventh to ninth convex portions P7, P8, and P9, The lines Y9a, Y9b, and Y9c passing through the centers of the light sources are the same as the lines Y2a, Y2b, and Y2c. At this time, the circumference of the imaginary circle Vc that forms each of the convex portions P0 (P7, P8, P9) The contact area can be gradually reduced toward the ninth convex portion P9. The contact area between the imaginary circle VcX passing through the ninth convex portion P9 and the outer edge of the ninth convex portion P9 is It may be 1 / 3 or less or 1 / 4 of the circumference of the circle VcX. The contact area between the imaginary circle Vc passing through the first protrusion P1 and the outer edge of the first protrusion P1 is The length of the circumference of the circle Vc can be 1 / 3 or more or 1 / 2 or more. The diameter of the circle Vc is the same, and the area of ​​the convex surface S13 gradually decreases toward the ninth convex portion P9. The area of ​​the concave surface S14 gradually increases as the surface area decreases. The difference in curvature between the convex surface S13 and the concave surface S13 is gradually reduced, and the surfaces are connected to each other. Each light source 100 in the third area A3 arranged on the curve Vc0 of the first area A1 In addition, the third area A3 can emit light in the same direction as each of the light sources 100. The depth D41 of the recesses C7 and C8 (see FIG. 9) gradually decreases toward the fourth surface S4. In the third region A3, the height of the convex portions P7, P8, and P9 increases as the distance increases toward the fourth surface S4. As shown in FIG. 9, the imaginary circles Vs2 and Vs3 formed by the concave surface S14 The magnitude of s3 becomes smaller as it moves away from the fourth surface S4 or the ninth convex portion P9. That is, the diameter of the imaginary circle Vs3 formed by the concave surface S14 adjacent to the seventh convex portion P7 may be may be smaller than the diameter of the imaginary circle Vs2 formed by the concave surface S14 adjacent to the ninth convex portion P9. As shown in FIGS. 5 and 9, the size of the imaginary circle formed by the concave surface decreases toward the fourth surface S4. gradually increases, or the size of the imaginary circle formed by the concave surface increases as it moves toward the third surface S3. The thickness may gradually decrease.

[0048] FIG. 10 shows another example of the invention in which the light exit surface of the lighting device 200A does not have a curved structure. The light sources 100, 101A, and 101D of the lighting device 200A are aligned at the target point Ta. In order to allow light to be collected, the centers of the light sources 100, 101A, and 101D and the convex portion P21 are aligned with the target. That is, each of the light sources 100, 101A, and 101D is aligned toward the point Ta. The light sources 101A and 101D are spaced apart from the light source 100 perpendicular to the target point Ta. The angle of inclination increases as the protrusion P2 corresponding to each of the light sources 100, 101A, and 101D increases. The straight line passing through the center of the convex surface S15 and the center of each light source 100, 101A, and 101D is The intersection between the target point Ta and each of the protrusions P21 can be achieved. The distance can vary depending on the type of lamp.

[0049] 11A and 11B show the arrangement of the light source 102A with the center Dx of the imaginary circle Vc forming the convex portion Pk1. The center Px is aligned, and (A) is the center Dx of the light source 102A is aligned with the line of the virtual circle Vc or (B) The light source center Dx is located on the line or circumference of the imaginary circle Vc. This is done according to the angle of emission from each light source 102A and the radius of curvature of each convex portion Pk1. The position of each light source 102A and the size K1 of each light source 102A can be adjusted.

[0050] In (A) and (B) of FIG. 12, the light source 102B is a large-sized light source similar to the light source 102A disclosed in FIG. The light source can have a size K2 that is smaller than the size K1. That is, the length K2 of the long side may be less than 5 mm, for example, in the range of 2 mm to 4 mm. In FIG. 11, the length K1 of the long side of the light source 102A is 5 mm or more, for example, 5 mm to This can be achieved by adjusting the size of each light source 102A, 102B. Since the exit angle at the convex surface S31 changes due to this, the radius of curvature of the convex portion Pk1 changes.

[0051] 13A and 13B, the protrusions Pk2 are arranged in an elliptical shape having a long length in the second direction X. In this case, the maximum width of the protrusion Pk2 may be greater than the height. The distance between k2 or the apex of the convex surface S32 and the light source 103A can be smaller. In this case, the elliptical shape has a length in the direction perpendicular to the emission direction of the light source 103A equal to the length of the emission direction of the light source 103A. It may be longer than the length in the projection direction.

[0052] 14A and 14B, the protrusions Pk3 are arranged in an elliptical shape having a long length in the first direction Y. In this case, the maximum width of the protrusion Pk3 may be smaller than the height. k3 or the distance between the convex surface S33 and the light source 103A can be larger. The elliptical shape at this time is such that the length in the direction perpendicular to the emission direction of light source 103A is equal to the length in the direction perpendicular to the emission direction of light source 103A. It may be smaller than the length of the direction.

[0053] In (A) and (B) of FIG. 15, the curve of the convex portion Pk4 includes an aspherical shape, and the center Dx of the light source is an aspherical shape. The surface may lie on the line of a circle or may be located inside the line of a circle. The aspheric convex surface S34 diffuses light to prevent hot spots at the center. , the light extraction efficiency at the edge side can be further increased.

[0054] 16 to 18, examples in which the light direction is changed by a convex portion and a light source will be described. Referring to FIG. 16, the straight line L11 connecting the convex portions P41 of the resin layer is horizontal. The angle Q5 is set at a predetermined angle Q5 relative to the straight line X0, and the angle Q5 has a range of 1 degree to 65 degrees. At this time, the reference light source 104 adjacent to the edge or center of the lighting device A does not need to be tilted relative to the horizontal line X0, and the other light source 104C may be tilted. The tilt angle Q6 can be in the range of 1 degree to 65 degrees. The bolt angle Q6 should be selected within the above range according to the lamp housing and bracket line. The straight lines Y3a and Y3b passing through the centers of the convex portions P41 and the light sources 104A and 104C can be The reference light source 10 may be parallel to each other or may be within the target area. Using the tangent to the protrusion P41 facing 4A as a reference, the other protrusions are further protruded in the emission direction. It can be put out.

[0055] Referring to FIG. 17, a straight line L13 connecting the convex portions P51 of the resin layer is aligned with a horizontal straight line X0. The angle Q5 may be in the range of 1 to 65 degrees. At this time, the reference light source 105A adjacent to the edge or center of the lighting device is horizontally The other light source 105C may not be tilted relative to the straight line X0. The tilt angle Q6 can be in the range of 1 degree to 65 degrees. Q6 can be selected within the above range according to the lamp housing and bracket line. The straight lines Y4a, Y4b, and Y4c passing through the centers of the convex portions P51 and the light sources 105A and 105C are The reference light source 105A and the reference light source 105C may be parallel to each other or may be within the target area. Using a tangent to the protrusion P51 facing in the rear direction as a reference, the other protrusions may be arranged in the rear direction.

[0056] FIG. 18 shows the arrangement of the reference light source 106A at the center of the lighting device, the outer light sources 106B, 6C is positioned in the rear direction, and the reference light source 106A and the outer light sources 106B and 106C are The convex portions P61 are arranged in a triangular structure. The shape obtained by connecting the vertices of the convex portions P61 is also presented as a triangular shape. A straight line Y5a passing through the centers of the convex portions P61 and the light sources 106A, 106B, and 106C, Y5b and Y5c may be parallel to each other or may fall within the target area.

[0057] FIG. 19 shows a configuration of a lighting device with a reference light source 107A at the center and outer light sources 107B and 10 7C is positioned in the front direction, and the reference light source 107A and the outer light sources 107B and 107C are The convex portions P71 are arranged in an inverted triangular structure. The shape obtained by connecting the vertices of the convex portions P71 is an inverted triangular shape. A straight line Y6 passing through the centers of the convex portions P71 and the light sources 107A, 107B, and 107C is provided. Y6a, Y6b, and Y6c may be parallel to each other or may fit within the target area. At least one or more of the lighting devices in FIG. 19 may be the lighting device in FIG. 1 or the lighting device in FIG. 5. For example, in the illumination device of FIG. The lighting device shown in FIGS. 16 to 19 is selected for at least one of the first to third areas A1, A2, and A3. It may be selectively arranged.

[0058] 20A to 20E show the center Px of the imaginary circle Vc forming the convex portion and the center Dx of the light source 100. 1 is a graph comparing the distribution of emitted light depending on the difference in the distance between the resin layer and the resin layer. The refractive index of the resin layer can be in the range of 1.2 to 1.7, and the higher the refractive index of the resin layer, the higher the light concentration. In addition, the greater the distance between the center Dx of the light source 100 and the center Px of the virtual circle Vc, the greater the amount of condensed light. That is, the distance between the center Dx of the light source 100 and the center Px of the virtual circle Vc is If the center of the imaginary circle V70 or the convex part P71 is 0, then (A) is 5 mm, (B) is 2 mm, (C) is the same position, (D) is -2 mm, and (E) is -5 mm. Here, the center Dx of the light source at (D) and (E) is within the virtual circle Vc. By irradiating the light at a position further away from the center Px, the light distribution can be further increased. do.

[0059] FIG. 21 is a diagram showing the output angle according to the center position of the light source and the convex portion in an embodiment of the invention. Referring to FIG. 21, the light source is calculated by Snell's law for each convex portion or convex surface S11. the position of the virtual circle Vc, the center Px of the virtual circle Vc, the distance between the center Px of the virtual circle Vc and the light source, The angle of incidence and the angle of exit at the convex surface S11 are calculated using parameters such as the refractive index and the external refractive index. The angle of incidence can be calculated. Here, N1 is the refractive index of air, and N2 is the refractive index of the resin layer. The coefficient of friction is θ1, which can range from 1.2 to 1.7. is the angle of incidence based on the normal to the tangent line passing through the circle, and θ2 is the angle of exit based on the normal Here, the relationship is N1×sinθ1=N2×sinθ2, and N1=sinθ2 Here, the output angle θ1 can be calculated by the trigonometric function θ2 can be calculated by the distance a between the light source and the center Px of the virtual circle Vc, Calculate from each parameter h, α, β, b, r2 and then apply Snell's law The light distribution changes depending on the angle of emission, so the position of the light source and the center of the convex part The distance a between the two can be adjusted according to the light distribution.

[0060] As shown in FIG. 22, the illumination device according to the embodiment has the following configuration, based on the third and fourth surfaces S3 and S4: 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. 23, the illumination device according to the embodiment can be bent in a convex shape toward the second reflective layer. The position is an area that bulges upward from the third surface S3 to the fourth surface S4 or toward the second reflective layer. and a downward or downward direction between the bulging region or an area adjacent to the bulging region. The protruding region and the protruding region may include at least one recessed region recessed toward the substrate. The recessed regions are arranged alternately.

[0061] 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 and S4 of the resin layer 220, excluding the first surface, A reflective layer or reflective film made of a resin material may be attached to the The reflective film can block light leakage from non-emitting areas. In the device, the thickness of the resin layer 220 is provided to be 3 mm or less, or thicker, for example, 3 mm to 6 mm. When provided in mm, the thickness of the resin layer 220 increases, resulting in an increased light emitting area and improved light distribution. The lighting device according to the embodiment of the invention can be applied to a lamp as shown in FIG. Examples of the lamps include headlamps, 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 scuffs, rear lights It can be applied to a combination lamp or a backup lamp.

[0062] Referring to FIG. 24, the lamp is housed in a housing having an inner lens 502. The lighting device 200 includes the first and second light sources 101 and 103 disclosed above. The thickness of the lighting device 200 is 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 thickness of the light source 200 may be equal to or less than twice the thickness of the light source 200, and the reduction in luminous intensity can be prevented. The inner lens 502 is positioned at a predetermined distance, for example, 10 mm, from the front surface of the lighting device 200. The outer lens 502 is disposed on the light-emitting side thereof and is spaced apart from the inner lens 502 by at least 1 mm. The lamp having such a lighting device 200 is an example, and other The lamp may be applied as a flexible structure, for example, a curved surface or a curved structure when viewed from the side. It is possible.

[0063] The features, structures, effects, etc. described in the above embodiments may be used in at least one embodiment of the present invention. 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 invention should be construed as being included in the scope of the present invention.

Claims

1. A substrate; a first reflective layer disposed above the substrate; a plurality of light sources disposed on the substrate, the light emission surfaces of which are orthogonal to the substrate; a resin layer disposed between the substrate and the first reflective layer and covering the plurality of light sources, an exit surface of the resin layer through which the light emitted from the light source passes is disposed outside between the substrate and the first reflective layer, the light exit surface of the resin layer includes a plurality of convex portions, each of the plurality of protrusions faces a corresponding one of the light source emission surfaces, and light emitted from the light source emission surfaces is emitted toward the resin layer emission surface; a part of at least one of the plurality of light sources is disposed within an imaginary circular area formed along the convex portion facing the light output surface of the at least one light source, The substrate includes a plurality of protrusions provided below the plurality of protrusions of the resin layer in shapes corresponding to the protrusions of the resin layer.

2. The plurality of light sources are arranged in a first direction, The lighting device according to claim 1 , wherein the light exit surface of the resin layer is arranged in a second direction perpendicular to the first direction.

3. the resin layer has first and second surfaces on both sides in the second direction and third and fourth surfaces on both sides in the first direction; The lighting device according to claim 2 , wherein the resin layer has a length in the first direction longer than a length in the second direction.

4. 4. The lighting device according to claim 3, wherein a virtual line connecting the plurality of light sources bulges relative to a straight line connecting a first convex portion adjacent to the third surface and a second convex portion adjacent to the fourth surface among the convex portions.

5. the resin layer includes a plurality of recesses, The lighting device according to claim 1 , wherein the plurality of recessed portions are respectively disposed between the plurality of protruding portions.

6. Each of the concave surfaces disposed in each of the plurality of recessed portions has a curvature, The lighting device according to claim 5 , wherein the concave surface of each of the plurality of recessed portions includes a region in which the radius of curvature of the concave surface increases in one direction along the light-emitting surface of the resin layer.

7. The lighting device according to claim 1 , wherein the first reflective layer includes a plurality of convex portions provided above the plurality of convex portions of the resin layer in shapes corresponding to the convex portions of the resin layer.

8. The lighting device according to claim 1 , wherein a diameter of the imaginary circle formed along each of the convex portions of the resin layer is greater than a thickness of the resin layer.

9. 9. The lighting device according to claim 1, wherein the thickness of the light exit surface of the resin layer is a distance from the top surface of the substrate toward the top surface of the first reflective layer, and is equal to or less than twice the thickness of the light source.

10. further comprising a second reflective layer disposed between the substrate and the resin layer; The lighting device according to claim 1 , wherein the second reflective layer includes a plurality of convex portions provided below the convex portions of the resin layer in shapes corresponding to the convex portions of the resin layer.

11. The lighting device according to claim 1 , wherein a maximum distance between the light source and the protrusions facing each other is greater than a thickness of the resin layer.

12. 12. The lighting device according to claim 1, wherein an angle between a first line connecting the centers of adjacent light sources and a second line passing through the center of an imaginary circle formed by the centers of the light sources and the convex portions is an obtuse angle.

13. The lighting device of claim 12 , wherein an angle between the first line and the second line increases along a direction in which the plurality of light sources are arranged.

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