Lighting module and lighting device having the same

Abstract

To provide a lighting module to emit line-shaped surface light in one direction, and a lighting device having the same.SOLUTION: A lighting device 200 includes: a plurality of light sources 100 disposed on a substrate; a resin layer 220 disposed on the substrate and the plurality of light sources 100; and a first reflective layer 240 disposed on the resin layer 220. The resin layer 220 includes an exit surface S1 facing the light sources 100. The exit surface S1 of the resin layer 220 includes a plurality of convex portions P0. The light sources 100 are disposed on a virtual curve VcO. Straight lines passing through respective centers of the first and second light sources adjacent to each other and respective centers of the convex portions P0 are disposed at obtuse angles with respect to a straight line connecting the adjacent first and second light sources.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] An embodiment of the invention relates to a lighting module having a plurality of light sources and a lighting device having the same. The embodiment of the invention is a lighting module that provides a surface light source in the form of a line. The embodiment relates to a lighting device having a lighting module. The embodiments relate to a light unit having a lighting module, a liquid crystal display device, and a vehicle lamp. It is something. [Background technology]

[0002] Lighting includes not only vehicle lighting but also backlighting for displays and signs. Light-emitting diodes (LEDs) consume less power and last longer than existing light sources such as fluorescent and incandescent lamps. Such light emitting devices have the advantages of long life, fast response speed, safety, and environmental friendliness. The LEDs are applied to various display devices and various lighting devices such as indoor and outdoor lights. In the past, a lamp was proposed that uses a light emitting element such as a light emitting diode as a light source for a vehicle. 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 increasing the light emitting area of ​​a lamp using a light emitting element. The small size allows greater freedom in lamp design and ensures 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 line-shaped surface light in one direction and a lighting device having the same. In one embodiment of the invention, the light emitted from a plurality of light sources is converted into a line-shaped light. The present invention provides a lighting module that provides a light source or a surface light source, and a device having the same. For example, 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 one embodiment of the invention, a resin layer having a light source is disposed between a plurality of reflective layers. In one embodiment of the invention, a light source and a resin layer are disposed between a plurality of reflective layers. In accordance with the present invention, a lighting device is provided having a light extraction structure on one side of the resin layer. A light source and a resin layer are disposed between a number of reflective layers, and a convex portion and a convex portion are formed on one surface of the reflective layer and the resin layer. The present invention provides a lighting device having a recessed portion. It is possible to provide a lighting unit, a liquid crystal display device, and a vehicle lamp. [Means for solving the problem]

[0004] The illumination device according to an embodiment of the invention includes a substrate, a plurality of light sources disposed on the substrate, and a front a resin layer disposed on the substrate and the plurality of light sources; and a first a reflective layer, the resin layer including an exit surface facing the light source, the exit surface of the resin layer being The surface includes a plurality of convex portions, and the plurality of light sources are arranged on an imaginary curve and adjacent to each other. The plurality of protrusions include a first protrusion facing the first light source, and a second convex portion facing the second light source, and a second convex portion where the first light source and the virtual curve are in contact with each other. A virtual first straight line passing through the center of the circle formed by the first convex portion at one point, the virtual The imaginary second straight line passing through the center of the circle formed by the second convex portion at the second point where the curves are tangent to each other is The angle between a first tangent line that is parallel to the imaginary curve at the first point and the first straight line is: It may include a first obtuse angle.

[0005] The illumination device according to an embodiment of the invention includes a substrate, a light source disposed on the substrate, and a light source disposed on the substrate. and a resin layer disposed on the light source, and a first reflective layer disposed on the resin layer. the resin layer includes an emission surface facing the light source, the light source including a plurality of light emitting elements the light emitting surface of the resin layer includes a plurality of protrusions corresponding to the plurality of light emitting elements, Each of the plurality of light-emitting elements is disposed on a virtual curve, and each of the plurality of protrusions is disposed on a virtual curve. The difference in the diameters of the imaginary circles they form is within 10%.

[0006] The illumination device according to an embodiment of the invention includes a substrate, a light source disposed on the substrate, and a light source disposed on the substrate. and a resin layer disposed on the light source, and a first reflective layer disposed on the resin layer. the resin layer includes an emission surface facing the light source, the light source including a plurality of light emitting elements the light emitting surface of the resin layer includes a plurality of protrusions corresponding to the plurality of light emitting elements, Each of the plurality of light-emitting elements is disposed on an imaginary curve, and a plurality of straight lines passing through the centers of imaginary circles formed by each of the plurality of protrusions, The points where each of the plurality of straight lines and each of the plurality of light emitting elements are tangent to the imaginary curve. The first angle between the tangents at a point can include an area that increases in one direction. .

[0007] According to an embodiment of the invention, a second tangent line that is tangent to the imaginary curve at the second point and the second straight line are The angle between the lines may include a second obtuse angle, said second obtuse angle being greater than said first obtuse angle. The plurality of light sources includes a third light source disposed on the virtual curve, and the plurality of convex portions include a third convex portion facing the third light source, and a third ground where the third light source and the virtual curve are in contact with each other; A virtual third straight line passing through the center of a circle formed by the third convex portion at a point is parallel to the second straight line, The angle between the third tangent line that is in contact with the imaginary curve at the third point and the third straight line includes a third obtuse angle. The virtual curve may be formed by dividing the first light beam by the second light beam, and the third obtuse angle may be greater than the second obtuse angle. The plurality of light sources may pass through a center of the light source, a center of the second light source, and a center of the third light source. The curvatures of the imaginary circles formed by the respective protrusions may be the same. The diameter of the light source may be greater than the thickness of the resin layer. The plurality of protrusions may be arranged in a virtual circle formed by the protrusions facing the source. a second reflective layer disposed between the resin layer and the substrate, The thickness of the resin layer may be smaller than the distance from the rear surface to the exit surface. The maximum distance from the center of each of the light-emitting elements to each of the protrusions may be the same. The plurality of light-emitting elements are preferably arranged on a circumference of the imaginary circle, A plurality of straight lines passing through the centers of the respective light-emitting elements and the respective centers of the imaginary circles are mutually The plurality of light emitting elements may be arranged in parallel to each other. The portion includes first to third convex portions, the plurality of straight lines include first to third straight lines, and the plurality of tangents The line includes first to third tangents, and the first angle between the first straight line and the first tangent is a first angle the first angle formed by the second straight line and the second tangent line is a second obtuse angle, The first angle formed by the third straight line and the third tangent is a third obtuse angle, and the second obtuse angle is The angle may be greater than the first obtuse angle and less than the third obtuse angle. The lines may have a slope relative to a horizontal line. Effect of the Invention

[0008] According to an embodiment of the invention, a resin layer and a light source are disposed between a plurality of reflective layers to form a line-shaped According to an embodiment of the invention, the lighting module has a small thickness and It is provided in a line shape with a long length in each direction, improving the luminosity and allowing freedom of design. According to an embodiment of the invention, a resin layer covering the light source is disposed between the multiple reflective layers. By forming the light source 100, the manufacturing process of the lighting module can be simplified. According to the embodiment of the invention, the optical loss can be reduced and the optical efficiency can be improved. The uniformity of the light emitted from the surface light source between the multiple reflective layers can be improved. According to the method, the centers of the light sources are aligned with the centers of the virtual circles forming the convex portions of the resin layer. By adjusting the angle of the light guide plate 110, the uniformity of the light can be improved along the light emission direction. According to the embodiment, the light source and the convex portion of the resin layer arranged along the imaginary curve or oblique line direction are By aligning the corresponding light sources, the uniformity of the light can be improved. The lighting module according to the present invention and the lighting device having the same have improved optical reliability. Vehicle lighting devices, light units, and various display devices having lighting modules according to the embodiments; The present invention can be applied to a surface light source lighting device. [Brief description of the drawings]

[0009] [Figure 1]FIG. 1 is a perspective view showing a lighting device according to a first embodiment of the invention. [Diagram 2] FIG. 2 is a cross-sectional view of the illumination device of FIG. 1 taken along the line BB. [Diagram 3] 3 is a cross-sectional view of the illumination device of FIG. 1 taken along line CC. [Figure 4] FIG. 4 is an example of a plan view of the lighting device of FIG. [Diagram 5] FIG. 5 is an example of a plan view of a lighting 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 an example in which a light source and a convex portion of a resin layer are aligned in a target direction in a lighting device according to an embodiment of the invention. [Figure 10] 10A and 10B are diagrams illustrating the light emission angle at a convex portion according to the position of a light source having a first size in an 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 second size in an embodiment of the invention. [Figure 12] 12A and 12B show examples of the embodiment of the invention in which the position of the light source on the elliptical convex portion that is long in the second direction X is changed. [Figure 13] 13A and 13B show examples of the embodiment of the invention in which the position of the light source on the elliptical convex portion that is long in the first direction Y is changed. [Figure 14] FIGS. 14A and 14B show examples of the embodiment of the present invention in which the position of the light source on the convex portion having an aspheric lens shape is changed. [Figure 15] FIGS. 15(A) to 15(E) are diagrams illustrating the path of light according to 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 16] FIG. 16 is a diagram for explaining the emission angle of light according to the positions of the convex parts of the resin layer and the light source in an embodiment of the invention. [Figure 17] FIG. 17 is an example of a flexible lighting device in accordance with an embodiment of the invention. [Figure 18] FIG. 18 is an example of a flexible lighting device in accordance with an embodiment of the invention. [Figure 19] FIG. 19 shows an example of a lamp to which the lighting device according to the embodiment of the invention is applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010]

[0023] Hereinafter, referring to the accompanying drawings, a person having ordinary skill in the art to which the present invention pertains will understand A detailed description of the 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 of the present invention. It should be understood that there are numerous equivalents and alternatives that may be substituted in the present invention. In explaining the principles of operation for the present preferred embodiment in detail, the known functions involved are Or, if it is determined that the detailed description of the configuration unnecessarily obscures the gist of the present invention. In some cases, detailed explanations will be omitted. The terms described below are used in consideration of their functions in the present invention. As defined terms, the meaning of each term shall be interpreted based on the overall content of this specification. For parts having similar functions and actions throughout the drawings, the same drawings should be used. The lighting device according to the present invention can be used in a variety of lamp devices requiring illumination, such as a vehicle It can be applied to dual-use lamps, home lighting devices, and industrial lighting devices. For example, it can be used in vehicle lamps. Where applicable, headlamps, width lights, side mirror lights, fog lights, tail lights mp), brake lights, auxiliary brake lights, turn signals, position lights, daytime running lights, vehicle interior lighting , door scuffs, rear combination lamps, backup lamps, room lamps, The lighting device of the present invention can be applied to indoor and outdoor advertising devices, displays, etc. It can also be applied to various electric vehicles and other fields, and is currently being developed and commercialized. It is currently being considered as a lighting-related product, and is being applied to all lighting-related fields and advertising that can be realized through future technological developments. It can be said that the present invention can be applied to various fields.

[0011] The following embodiments will become more apparent 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" a material or pattern, 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. FIG. 3 is a cross-sectional view of the illumination device of FIG. 1 taken along line CC; and FIG. 2 is 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 may be arranged in a first direction Y such that the lighting devices 200 face each other in the first direction Y. and two side surfaces corresponding 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. The illumination device 200 can have a range of 2.4 mm to 3 mm. The lighting is provided in modules that can be linear, curved or wavy, allowing freedom in the design of the lighting. The lighting is improved and the lamp is efficiently placed 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 214 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. The light source 100 may include a plurality of are arranged in the second direction X or in a direction from the third surface S3 to the fourth surface S4. 0 is arranged in one row. As another example, the light source 100 may have two or more rows arranged in different columns. The light sources 100 may be arranged in a straight or curved line extending in the second direction X. Each of the light sources 100 may be a light-emitting element. Thus, the spacing G1 between adjacent light sources 100 may be the same. G1 may be identical to one another for uniform distribution of light emitted from light source 100. The distance G1 is the thickness of the lighting device 200, for example, the distance from the lower surface of the substrate 210 to the first reflective layer 240. For example, the vertical distance to the top surface of the In this case, the gap G1 may be three times or more as large as the thickness Z1. The gap G1 may be 0 mm or more, for example, in the range of 10 mm to 20 mm. If the value is larger than the above range, the luminous intensity may decrease. If the value is smaller than the above range, the light source 10 As another example, as shown in FIG. 5, adjacent light sources 100 are arranged on the same straight line. In this case, the line connecting two adjacent light sources 100 is a virtual curve or a variable line. The illumination device 200 has a maximum length X1 in the second direction X. The length in the first and second directions Y and X may be greater than the maximum length Y1 in the first direction Y. The maximum length X1 in the second direction X may be greater than the thickness Z1 or height in the vertical direction Z. can be varied depending on the number of light sources 100 arranged, and can have a value of, for example, 30 mm or more. The maximum length Y1 in the first direction Y is 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 0, an area for protecting the rear of the light source 100, and a pattern The third surface of the lighting device is provided with respect to the maximum length Y1 in the first direction Y. The length at the fourth surface (e.g. S3) and the length at the fourth surface (e.g. S4) may be the same or different. For example, the length of the fourth surface S4 in the first direction Y may be shorter than the length of the third surface S3. The light source 100 is disposed between layers of reflective material that are vertically opposed to each other. The light source 100 is a light source that is formed by absorbing light from one of the layers of reflective material in the area between the layers of reflective material that are vertically opposed to each other. The light source 100 may be disposed adjacent to a vertically opposed supporting member. The light source 100 may be disposed between the light source and a reflective material or layer. The lighting device 200 can emit light in one direction or in multiple directions. The light source 10 may have the same thickness or height as each other. 0 is sealed with a layer of transparent plastic material, which is sandwiched between layers of reflective material. The reflecting layer or member may be disposed between the supporting member and the reflective layer or member.

[0014] The substrate 210 includes a printed circuit board (PCB), and is made of, for example, a resin PCBs, Metal Core PCBs, Flexible PCBs, The substrate 210 may include a laminated PCB or a FR-4 substrate. The substrate 210 may be a substrate made of a flexible material or 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.

[0015] The resin layer 220 is disposed on the light source 100. The resin layer 220 The light sources 100 may be arranged on either side of the light sources 100, between adjacent light sources 100, or may be arranged such that each light source 100 has a 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 light source 100 can be embedded in the resin layer 220. The resin layer 220 may include a glass material as another material. The light sources 100 are arranged in a first row or along a virtual line, with n (n≧2) pieces of the light sources 100 being arranged in the first row or along a virtual line. The thickness of the layer 220 is smaller than the thickness of the lighting device 200, so that the width of the line light is That is, the width of the line light source can be smaller than the thickness of the resin layer 220. The resin layer 220 may have a first surface S1 and a second surface S2 disposed on opposite sides to each other. 4, and a third surface S3 and a fourth surface S4 disposed opposite each other. In this manner, 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 are arranged to correspond to each other in the second direction X. The first and second surfaces S1 and S2 are arranged on the basis of an imaginary line connecting the plurality of light sources 100. The third and fourth surfaces S3 and S4 are disposed so as to correspond to each other. As another example, as shown in FIG. The first and second surfaces S1 and S2 are extended along an imaginary line and are aligned with the plurality of light sources 100 as a reference. The two are arranged opposite each other.

[0016] Each of the outer surfaces 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 as each other. , S4 is a direction perpendicular to each side surface 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 disposed on the same plane. At least one of S2, S3, and S4 is the substrate 210, the second reflective layer 230, and The first reflective layer 240 may be disposed 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 a direction in which light is emitted from the multiple 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 light sources 100 may be disposed 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 length of the first surface S1 and the second surface S2 in the second direction X is The maximum length 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 in the vertical direction 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. In the resin layer 220, the first surface S1 and the second surface S2 are arranged in a second direction. The third surface S3 and the fourth surface S4 may be a side surface 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 ends of the third surface S3 and the fourth surface S4. The second surface S2 may be a surface facing the rear surface of the plurality of light sources 100 or a surface facing the third surface S3. The third surface may be a surface exposed in the second direction X from the second end of the surface S3 and the fourth surface S4. The fourth surface S3 and the fourth surface S4 may be 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 corresponds to the second surface S2. It is also possible.

[0017] 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 light is emitted through at least one of the second surface S2, the third surface S3, and the fourth surface S4. That is, most of the light emitted from the light source 100 is emitted through the first surface S1. In the illumination device 200, the maximum lengths Y1 and X1 in the first and second directions are the first length of the resin layer 220. , 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 first surface S1 of the resin layer 220 has a thickness of about 1 mm. The thickness of the resin layer 220 may be less than 3 mm. The first surface S1 may be an emission surface through which light emitted from the light source 100 exits. may be a front or exit surface, and the second surface S2 may be a rear or non-exit surface. The first surface S1 may have a vertical plane that is formed along the second direction X with a protrusion P0 and a recess C As another example, the first surface S1 is extended in a structure having a bulge in the vertical direction. It is a curved surface that protrudes from the top to the bottom, or a slanted structure that protrudes from the bottom to the top. The first surface S1 may have a regular uneven shape or an uneven shape. The first surface S1 may be a side surface on which structures are arranged. The first surface S1 may be a region having a larger surface area than the light source 100. A plurality of convex surfaces S11 and a plurality of concave surfaces S12 respectively disposed 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 arranged in a direction toward the first surface S1 or the exit direction. The convex surface S11 may include a convex lens surface. The resin layer 220 may be provided as a projection P on the first surface S1. 0, the concave surface S12 is disposed in the region between the first and second electrodes. 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 surface between the protrusions P0. The recessed portion C0 may be recessed toward the second surface S2 in the region. , the recessed portion C0 may overlap with the region of the concave surface S12 in the second direction X. The recessed portions C0 are disposed between the protruding portions P0 and the third and fourth surfaces S3 and S4. The recessed portion C0 may be a concave portion disposed in an area between the protruding portions P0. The first surface S1 may include a surface S12. Here, the first surface S1 may 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 arranged on the outermost edge in the second direction X may be a part of the convex surface S11. The convex surface S11 of the edge extends from the third surface S3 or from the fourth surface S4. The centers of the respective convex surfaces S11 are aligned in the first direction Y with respect to the respective light sources 100. The centers of the plurality of protrusions P0 are arranged at positions corresponding to the centers of the first and second protrusions P1 and P2. The light sources 100 are arranged at positions corresponding to the centers of the light sources 100 in the Y direction. Each of the light sources 100 may 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 overlaps with the concave surface S12 in the first direction Y. Each of the plurality of light sources 100 is disposed in a first direction relative to the recessed portion C0. 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 Y. The vertical height of the concave surface S12 may be equal to the thickness of the resin layer 220. The resin layer 220 may cover the light source 100 or may have a thickness equal to the vertical thickness of the light source 100. Each of the light sources 100 may include a light emitting chip. The light source 100 includes a reflective sidewall, e.g., a body, surrounding the outside of the light emitting chip. The reflective side wall 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 reflecting material as a part of the light emitting portion 11 or a separate reflecting material. The sides except for 1 can be made of reflective material or transparent or opaque material. The resin layer 220 has 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 a saying.

[0018] 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. The light sources 100 are electrically connected in series by the circuit pattern of the substrate 210. Alternatively, the optical fibers may be connected in series-parallel, parallel-series, or parallel. The sources 100 are arranged in various interconnection groups according to the circuit pattern on the substrate 210 . The light source 100 may be 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, green. The light source 100 emits light in a lateral direction. The bottom of the light source 100 is disposed on the substrate 210. As another example, the light source 100 may be an LED chip. One surface of the LED chip may be open, and the other surface 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 having a surface that is The phosphor layer may include a covering phosphor layer or a molding member. The molding member may be a transparent resin portion having a phosphor. Alternatively, it may be a transparent resin material that does not contain impurities such as phosphors.

[0019] 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 may be in the range of 0 mm. If the thickness is smaller than the above range, the area where moisture can penetrate and the circuit pattern can be formed becomes small. If the distance is greater than the range, the size of the lighting device 200 becomes large. The maximum distance between the convex surface S11 and the light source 100, or the straight line 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 light sources 100 are arranged in the same straight line, the module size becomes large. In this case, the distance D1 between the line connecting the adjacent concave surfaces S12 and each of the light sources 100 is 5 mm or more, for example, in the range of 5 mm to 12 mm, and the distance D1 is within the range If it is smaller, the depth D4 of the recess C0 becomes deeper or the maximum distance D2 becomes narrower. The distance D1 is the distance between the light sources 100 and the recessed portion C0. That is, the light directivity angle can be changed by the line connecting both ends of the convex portion P0 and each of the light sources 100. If the spacing between the convex and concave surfaces S11 is too close, the light will be focused on the center area of ​​the convex surface S11. The light is irradiated onto the surface S12, and the luminous intensity through the convex surface S11 is reduced. The interval W1 between the recesses C0 or the concave surfaces S12 is the interval W1 between the adjacent recesses C0. The distance W1 is a straight line distance and may be equal to or smaller than the interval G1 between the light sources 100. is greater than the interval G1 between the light sources 100, two or more light sources are provided in the region of the protrusion P0. 100 is placed to increase the luminous intensity, but it becomes difficult to control the light distribution. When the distance G1 between the light sources 100 is smaller than the distance G1 between the light sources 100, the size of the convex portion P0 is small, so that the light However, the luminous intensity will be reduced.

[0020] The interval W1 between the recesses C0 is 15 mm or more, for example, in the range of 15 mm to 20 mm. The interval W1 of the recessed portion CO may be greater than the depth D4 of the recessed portion C0. 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 recessed portion 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 range, the dark area between the adjacent protrusions P0 increases. If the distance is greater than the range, the light source 100 advances to an area adjacent to the light source 100. The depth D4 of the recess C0 is set to a value that connects the apexes of the protrusions P0. The second reflective layer 23 may be a straight line distance between the bottom point of the recessed portion C0 and the straight line. 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 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. 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 bottom surface of the resin layer 20 may be the same as the area of ​​the top surface of the second reflective layer 230. The area of ​​the top surface of the first reflective layer 240 may be the same as the area of ​​the top surface of the first reflective layer 240. In addition, the length of the resin layer 220 may be the same as the length (e.g., X1) of the substrate 210. The maximum length of the resin layer 220 in the second direction X is equal to or larger than the length of the second reflective layer 230 or the length of the first reflective layer 240. The maximum length of the resin layer 220 in the first direction Y (e.g., For example, Y1) may be the same as the maximum length of the substrate 210. The maximum length (e.g., Y1) of the layer 220 may be 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 is preferably equal to or larger than the first reflective layer 240. The minimum length of the resin layer 220 in the first direction Y may be equal to the maximum length of the substrate. The minimum length of the resin layer 220 in the first direction Y may be equal to the minimum length of the plate 210. , 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 direction Y is the distance between the apex (or high point) of the convex portion P0 of the lighting device and the second surface S2. The maximum distance may be the distance between the bottom point of the concave surface S12 of the lighting device and the second surface S2. It may be the minimum distance between

[0021] 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 disposed on the resin layer 220. Thus, the resin layer 220 can be prevented from being damaged by the light source 100. 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 a top 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 by an adhesive. The second reflective layer 230 is formed on the light source 100 so as to have a region corresponding to the lower surface of the light source 100. A plurality of holes 232 are provided in the substrate 210, and 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 a white resin material or a plastic. The second reflective layer 230 may include a white resin material or a polyester (P The second reflective layer 230 may include a low reflection film, a high reflection film, or a reflective (ET) material. 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 regular reflection film for reflecting incident light to the first surface S1. It may be provided as.

[0022] 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 is such that the transmission loss of the incident light can be reduced. The thickness Zc of the reflective layer 230 may be in the range of 0.2 mm to 0.4 mm. If the thickness is smaller than this range, a loss in light transmission occurs. If the thickness is larger than this range, the thickness Z of the lighting device 200 The 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. Here, the thickness of the light source 100 may be Zb. The length may be smaller than the length K1 (FIG. 4) in the second direction X. The thickness of the light source 100 is 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 entering. The light source 100 has a substrate 210 disposed at the bottom and a glass substrate 220 disposed at the top. The oil layer 220 is disposed to 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 the 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, 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 a maximum length Y1 and The maximum length Y1 in the first direction Y may include the apex of the protrusion P0 and the minimum length. 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 in the first direction of the lighting device 200 is By arranging the length of Y or the minimum width, the light is formed in a line shape in the first direction Y. The lighting device can provide a source of illumination, improve luminosity and prevent hot spots. Alternatively, the insulating layer 11 may be provided with a certain thickness and a flexible property that can be curved 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 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 may be smaller than the thickness Z of the lighting device 200. It may be 0.8 times or less than the thickness Z1 of the lighting device 200, for example, 0.4 times to 0. The resin layer 220 may have a thickness Z1 of the lighting device 200 and a thickness of 8 times the thickness Z2 of the lighting device 200. Since the gap between the light sources is less than 1.2 mm, the light source efficiency of the lighting device 200 can be prevented from decreasing. As shown in FIG. 4, the second light source 100 is 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 protrusion 100. The thickness Zb of the resin layer 220 may be greater than the thickness of each of the light sources 10. The thickness Zb of the resin layer 220 may be smaller than the length or maximum length of the second direction X of may be smaller than the maximum length of the convex surface S11 in the second direction X. That is, 220 thickness Zb, and a line shape, for example, 3 mm or less, is formed through the first surface S1 in one direction. A surface light source having the line width as shown in FIG. The concave surface S12 may be flat or may have a first curvature. Here, the radius of curvature of the protruding portion P0 can be 5 mm or less. For example, it can have a range of 5mm to 15mm or a range of 8mm to 11mm. When the radius of curvature of each of the convex portions P0 is smaller than the above range, the improvement in luminous intensity becomes small, and If the range is larger than the range, a dark area may occur. Alternatively, the two or more radii of curvature may be smaller than the radius of curvature of the protruding portion P0 by 0.12 times or less. The ratio of the radius of curvature of the concave surface S12 to the radius of curvature of the convex portion P0 is in the range of 1:8 to 1:28. When the radius of curvature of the concave surface S12 is smaller than the above range, If the amount of light emitted through the surface S12 decreases and the dark area increases, the convex portion The size of the portion P0 becomes small, and optical interference between the light sources 100 may occur. Therefore, the depth D4 and the radius of curvature of the concave surface S12 are determined based on the position of the light source 100 and the position of the light source 100. 00, the uniformity of light through the convex portion P0 and the recessed portion C0 is improved. and a range for suppressing a dark area in the recessed portion C0. The radius of curvature of S12 is 1.2 mm or less, for example, in the range of 0.5 mm to 1.2 mm. The concave surface S12 is provided in a curved shape with a predetermined curvature, so that the incident light The light can be refracted and transmitted, and the occurrence of dark areas in the recessed portion C0 region is reduced. It is possible.

[0023] Meanwhile, the resin layer 220 is made of silicone, silicone molding compound (SMC), etc. ), may contain resinous materials such as epoxy or epoxy molding compound (EMC). The resin layer 220 is made of a UV (ultra violet) curable resin or a thermosetting resin material. For example, PC, OPS, PMMA, PVC, etc. may be selectively included. For example, The main material of the resin layer 220 is a resin material whose main ingredient is urethane acrylate oligomer. For example, a synthetic oligomer, urethane acrylate oligomer, can be used. It is possible to use a mixture of the polymer type, which is polyacrylic. Here, IBOA (isobornyl acrylate), HPA (hydroxylpropyl acrylate), which are low-boiling point dilutable reactive monomers, are used. It also includes mixed monomers such as 2-hydroxyethyl acrylate and 2-HEA (2-HEA). It is possible to use a photoinitiator (e.g., 1-hydroxycyclohexyl phenyl-ketone) or In the resin layer 220, beads (not shown) may be mixed. The beads may include a diffusing and reflecting element that diffuses and reflects the incoming light, thereby increasing the amount of light. The resin layer 220 may include a phosphor. contains at least one of a yellow phosphor, a green phosphor, a blue phosphor, and a red phosphor. The region of the resin layer 220 where the convex portion P0 is formed serves as a lens portion. The lens portion of the resin layer 220 may be provided in a lens shape having a convex surface. In top view, the shape may include a hemispherical shape, a semicircular shape, a semi-elliptical shape, or an aspherical shape. The lens may include a collimator lens. The closer the apex of the lens portion is to the center of the light source 100, the closer the distance to the light source 100 becomes. The thickness of the lens portion in the third direction Z is the thickness of the resin layer 220. Such a lens portion may have flat upper and lower surfaces and a curved surface in the direction of the first surface S1. Since the lens portion is formed in the first surface S1, the light incident in the direction of the first surface S1 can be diffused. , disposed between first and second reflective layers 240, 230 that are flat on the top and bottom, and a first surface S The lens portion can refract the light in a direction perpendicular to the optical axis and emit the light in a direction perpendicular to the optical axis. The light incident on the area outside the range can be refracted to an exit angle larger than the incident angle. When the lighting device 200 has a bend due to its flexible property, the resin layer 220 and the first And the second reflective layer 240, 230 may include uneven curved regions. The convex surfaces S11 of the resin layer 220 are arranged to receive the light emitted from each of the light sources 100. In the resin layer 220, the light emitted from the protrusions P0 is The recessed portion C0 is provided as a recess recessed toward the second surface S2. The recessed portion C0 of the layer 220 is formed on the concave surface S12 of the resin layer 220. The light emitted from each light source 100 exits from the area between the protrusions P0 through the recessed portion C0. Since the resin is irradiated with the light, the occurrence of dark areas in the recessed portion C0 can be reduced. When the protrusion P0 and the recess C0 are disposed in the layer 220, the substrate 210 and the first The second reflective layers 240 and 230 have a shape corresponding to the convex portion P0 and the recessed portion C0 in one direction. The convex portions P0 or lens portions of the resin layer 220 are provided in the shape of a square. may be the same as

[0024] The first reflective layer 240 may be made of the same material as the second reflective layer 230. The reflective layer 240 is made of the same material as the second reflective layer 230 in order to reflect light and reduce light transmission loss. The first reflective layer may be made of a material having a higher light reflectance or may have a larger thickness. 240 may have a thickness 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 are provided with the same material and thickness. The thickness Zd of the first reflective layer 240 may be equal to or smaller than the thickness Za of the substrate 210. The thickness Zd of the first reflective layer 240 may be 0.5 times the thickness Za of the substrate 210. 1x or more, for example, in the range of 0.5x to 1x, which can reduce the transmission loss of incident light. The thickness Zd of the first reflective layer 240 is in the range of 0.2 mm to 0.4 mm. If the thickness is smaller than the above range, a loss in light transmission occurs, and if the thickness is larger than the above range, the lighting device The thickness Z1 of the 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 material that reflects light, such as a metal or a non-metal material. When the first reflective layer 240 is made of a metal, it may include stainless steel, aluminum, or the like. It can contain metal layers such as aluminum (Al) and silver (Ag), and if it is a non-metallic material, it is a white resin material. The first reflective layer 240 may include a white resin material or a plastic material. The first reflective layer 240 may include a low reflection film, a high reflection film, and a PET material. At least one of a reflective film, a diffuse reflective film, or a regular reflective film may be included. The first reflective layer 240 may be configured to reflect light in a direction toward the first surface S1. The first and second reflective layers 240 and 230 may be the same or may be provided as a reflective film. The substrate 210 and the first and second reflective layers 240, 23 may be made of different materials. 0 may include the convex portion P0 and the recessed portion C0 of the resin layer 220. That is, the resin layer The substrate 210 and the first and second reflective layers 240, 220 are disposed on the upper and lower surfaces of the convex portion P0. The protrusion P0 of 30 is disposed on the recess C0, and the substrate 210 and the first and second reflectors are disposed on the recess C0. The recessed portion C0 of the layers 240 and 230 is thus disposed. The laminated structure of the layer 230, the resin layer 220 and the first reflective layer 240 is such that the convex portion The protrusion P0 may have the same structure as the recess C0. The recessed portion C may have a flat shape and may have a curved or hemispherical shape in the first direction Y. The resin layer 220 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 e) The haze surface can be treated into a surface or prism shape to diffuse light. The inner surface of the resin layer 220 is treated to have a rougher surface, so that the emitted light can be diffused. Here, as shown in FIG. 4, in the region of the imaginary circle Vc formed by each of the convex parts P0, That is, the maximum distance D between the convex portion P0 and the light source 100 may be 2 may be smaller than the diameter r0 of the virtual circle Vc. The directional angle distribution of light through each convex part P0 arranged on a virtual 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 designing the line light source and provides stable illumination. The uniformity of the entire line light source can be improved. 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 set to less than 3 mm, for example, in the range of 1.5 mm to 1.9 mm. In this case, the width of the line-shaped surface light source may 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 is 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 vehicle lamps, for example, as a side light, a parking light, a side ... Mirror lights, fog lights, tail lights, brake lights, auxiliary brake lights, turn signals, position lights Headlights, daytime running lights, vehicle interior lighting, door scuffs, rear combination lamps (R CL), backup lamps, room lamps, and dashboard lighting can be selected. The rear combination lamp may include a brake light, a tail light, a turn signal light, and a backup light. Up lamps may be included. Among the above lamps, depending on the car line It can be provided as a curved lamp.

[0025] 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 a virtual straight line connecting each convex portion P0 faces the target area, the target area The target area is arranged at equal intervals from each of the protrusions P0. For example, the target area may be a lens, e.g., an inner The number of light sources 100 in the first embodiment may be the same as the number of the protrusions P0, and may be two or more, for example, 2 to 1, along the second direction X. 00 or in the range of 3 to 40. That is, the third surface S3 and the fourth surface S4 Two or more light sources 100 are arranged between the light sources 100. The number of such light sources 100 arranged is It can be changed according to the installation environment and target lighting. That is, the lamp line of the target area (e.g., car line) is a curved line or a bent line. When provided in the image, virtual lines connecting multiple convex parts or virtual lines connecting multiple light sources are The in is a curved structure or an inclined line according to the lamp line of the target area. The second embodiment includes the configuration of the first embodiment, and changes the position of the light source and the position of the convex portion. In the description of the second embodiment, the same configuration as in the first embodiment will be described in the same manner as in the first embodiment. I will refer to the following.

[0026] FIG. 5 is a plan view of an example of a lighting device according to a second embodiment, and FIG. 6 is a schematic diagram of the lighting device of FIG. FIG. 7 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. 8 is a plan view of the resin layer 220 or the first reflective layer 240. As shown in FIG. 2, the lighting device 200 includes a substrate 210, a light source 100, a first reflective layer 240, and a The second reflective layer 220 may be disposed between the substrate 210 and the resin layer 220. The second reflective layer 230 reflects light traveling toward the substrate 210. The first and second reflective layers 240, 230 can be made reflective or removed. The resin layer 220 reflects light emitted from the light sources 100. The light guide 20 guides the light and emits the light through the first surface S1. The light sources 100 are connected in a direction from the third surface S3 to the fourth surface S4 in a virtual curve Vc0. The virtual curve Vc0 is arranged along the The virtual curve Vc0 can pass through the center of each light source 100. The imaginary curve Vc0 is the first light source 101 (hereinafter referred to as the first light source) among the multiple light sources 100. and the center of the last light source 109 (hereinafter referred to as the ninth light source) are connected to the line L9. It can have a bulge or positive curvature. Or, it can have a virtual The line has a curved line that bulges out from the straight line that connects the first light source 101 and the ninth light source 109. , and can expand in the first surface direction. A part of the virtual line passing through the plurality of light sources 100 is The light sources 100 are arranged in a direction parallel to the first surface S1 and the second surface S2. The line connecting the protrusion P0 from the third surface S3 to the fourth surface S4 is along the imaginary curve Vc0. In FIG. 2, the first surface S1 of the resin layer 220 has a plurality of protrusions P0 and The first surface having the protrusion P0 and the recessed portion C0 may include a plurality of recessed portions C0. S1 may be the exit surface. That is, the first surface S1 of the resin layer 220 may be the exit surface. In the resin layer 220, the first surface S1 or the light exit surface includes a convex surface S11 and a concave surface S12. The convex surface S11 is the outer surface of the convex portion P0, and most of the light is emitted from the convex surface S11. The concave surface S12 is a recessed surface between the protruding portions P0, and light is emitted from the concave surface S12. In this way, the substrate 210, the first reflective layer 240, and the second reflective layer 240 are formed on the convex portion of the resin layer 220. The shape of the protrusions and recesses P0 and C0 may include the same structure as the protrusions and recesses. For such a configuration, please refer to the explanation of FIGS. 1 to 4. Using the first convex portion P1 as a reference, a straight line L1 passing through two adjacent convex portions and the last ninth light source 1 The interior angle Q2 between the straight line L2 passing through two adjacent convex parts is an obtuse angle. With respect to the straight line L1, two adjacent convex portions arranged in the center region A2 may be The angle Q1 with the straight line L3 passing through the line L1 may be greater than the angle Q2 and may be an acute angle. The straight line L2 connecting the outermost convex parts is at an angle of 70 degrees or less with respect to the straight line in the second direction X. The interior angle Q2 may be in the range of 91 degrees to 150 degrees, The lines can be changed according to the housing and bracket of the applied lamp. The light source 100 is located on the imaginary curve Vc0. The light source 100 is placed on the imaginary curve Vc0. The intervals G1 and G2 between the straight lines may be the same. Each of the intersecting straight lines extends in a direction perpendicular to the long side of the light source 100. A straight line perpendicular to the light source 100 is aligned in the direction of the optical axis or the center of the light source 100. The distances G1 and G2 are arranged to be equal to each other for uniform distribution of light. However, they can be arranged at different intervals. For example, the distances from the straight line L3 in the center region are relatively large. The distance G2 between the separated light sources (e.g., 109) can be smaller than the distance G1. For the purpose of uniformity of light, the light source intervals G1 and G2 are the same or are different from each other in the center area ( For example, A2) can be made narrower in a certain area (e.g., A3) or a specific For example, the area (e.g., A1) adjacent to the third and fourth faces S3 and S4 may be wider. The difference in the spacing between two adjacent light sources may be within 10%. If the difference in spacing exceeds 10%, the light uniformity between the light sources adjacent to the third and fourth faces S3 and S4 will be There is a problem where a one-time difference can become a big one.

[0027] In the lighting device, each of the plurality of light sources 100 is That is, the central axis direction of each light source 100 is inclined or tilted with respect to the first direction Y. They are arranged to be inclined. Thereby, the straight lines extending the long sides of two adjacent light sources The intervals G3 and G4 therebetween may be horizontal intervals, the smallest in the direction of the third surface S3, and gradually increasing in the direction of the fourth surface S4. That is, it is possible to satisfy G3 < G4 for the said intervals. The long side of the said light source 100 may be the side surface where the light emitting part 111 (refer to FIG. 2) is arranged or the rear surface Sb (refer to FIG. 6) on the opposite side thereof. That is, the said light source 100 is such that the horizontal interval G3 between two adjacent light sources 100 gradually increases in the direction from the first light source 101 to the fourth surface S4. The interval Gd between the vertical straight lines between two adjacent light sources 100 may be the same as each other or may have an interval difference within 10%. Thereby, when the lighting device is installed along the line of the vehicle lamp, it is possible to have a uniform surface light source distribution on each line. Further, the lighting device is provided by a line light source with a thickness of 3 mm or less, and may be provided by a flexible or non - flexible line light source. The said light source 100 is arranged on the virtual curve Vc0. The said virtual curve Vc0 is arranged on the straight line connecting the centers of the plurality of light sources 100. The straight line connecting two adjacent light sources among the plurality of light sources 100 may have an inclination with respect to the first or the second directions Y and X. In the region (for example, A1, A3) close to the edge in the lighting device 200, the straight line connecting two adjacent light sources among the plurality of light sources 100 may have different inclinations with respect to the first and second directions Y and X. Here, the inclination of the straight line connecting two light sources adjacent to the fourth surface S4 may be larger than the inclination of the straight line connecting two light sources adjacent to the third surface S3. As another example When the lighting device is installed along the line of the vehicle lamp, it is possible to have a uniform surface light source distribution on each line. Further, the lighting device is provided by a line light source with a thickness of 3 mm or less, and may be provided by a flexible or non - flexible line light source. The said light source 100 is arranged on the virtual curve Vc0. The said virtual curve Vc0 is arranged on the straight line connecting the centers of the plurality of light sources 100. The straight line connecting two adjacent light sources among the plurality of light sources 100 may have an inclination with respect to the first or the second directions Y and X. In the region (for example, A1, A3) close to the edge in the lighting device 200, the straight line connecting two adjacent light sources among the plurality of light sources 100 may have different inclinations with respect to the first and second directions Y and X. Here, the inclination of the straight line connecting two light sources adjacent to the fourth surface S4 may be larger than the inclination of the straight line connecting two light sources adjacent to the third surface S3. As another example or the second directions Y and X. In the region (for example, A1, A3) close to the edge in the lighting device 200, the straight line connecting two adjacent light sources among the plurality of light sources 100 may have different inclinations with respect to the first and second directions Y and X. Here, the inclination of the straight line connecting two light sources adjacent to the fourth surface S4 may be larger than the inclination of the straight line connecting two light sources adjacent to the third surface S3. As another example light sources among the plurality of light sources 100 may have different inclinations with respect to the first and second directions Y and X. Here, the inclination of the straight line connecting two light sources adjacent to the fourth surface S4 may be larger than the inclination of the straight line connecting two light sources adjacent to the third surface S3. As another example light sources among the plurality of light sources 100 may have different inclinations with respect to the first and second directions Y and X. Here, the inclination of the straight line connecting two light sources adjacent to the fourth surface S4 may be larger than the inclination of the straight line connecting two light sources adjacent to the third surface S3. As another example light sources among the plurality of light sources 100 may have different inclinations with respect to the first and second directions Y and X. Here, the inclination of the straight line connecting two light sources adjacent to the fourth surface S4 may be larger than the inclination of the straight line connecting two light sources adjacent to the third surface S3. As another example At least two of the straight lines connecting two adjacent light sources 100 have the same inclination. As another example, a straight line connecting the two adjacent light sources 100 may be provided. At least one or more of the above may have different inclinations. The slope of the line connecting two adjacent light sources in the lighting device is the area A1 of the light source. , A2, and A3 of the lighting device. 2. The slopes of the lines connecting adjacent light sources 100 in A3 are different from each other. For example, the first area A1 may include a first group of light sources adjacent to the third surface S3. The second region A2 is an area in which the light sources of the second group on the center side are arranged. The third area A3 is an area in which the light sources of the third group adjacent to the fourth surface S4 are arranged. The number of light sources in each group may be the same or different from each other. That is, the inclination increases from the second area A2 to the first area A1, and decreases in the third area A3. The increase rate of the slope at this time increases as the slope extends from the second region A2 to the first region A1. The increase rate of the slope of the straight line extended to the third region A3 is greater than the increase rate of the slope of the straight line extended to the third region A4. It's okay if it gets bigger.

[0028] For example, when the lighting device is applied to a lamp of a vehicle, the first area A1 is a The third area A3 is the area closest to the center of the vehicle front or rear. The convex portion P0 may have a hemispherical shape, a semi-elliptical shape, or an aspherical surface. The imaginary circle Vc formed by the protruding portion P0 may include at least one of the following shapes: The shape may include at least one of a circle, an ellipse, and a ring shape having an aspheric surface. The radius of curvature or the curvature of the concave surface S12 between the convex portions P0 is determined by the areas A1, A2, and A3. The radius of curvature of the concave surface S12 in each of the regions A1, A2, and A3 may be different in one direction. The curvature of the concave surface S12 may be in one direction or in the other direction toward the fourth surface S4. The convex portion P0 or the convex surface S11 and the concave surface S12 may be smaller toward the fourth surface S4. The difference in the curvature or radius of curvature is largest in the area close to the third surface S3 and is largest in the area close to the fourth surface S4. In the illumination device, the maximum length Y1 of the third surface S3 is This is because the length Y2 of the first and second areas A1 and A2 in the lighting device may be longer than the length Y2 of the first and second areas A1 and A2 in the lighting device. Components such as circuit patterns and connectors will be placed at the rear, so the length of the fourth surface S4 The through hole H1 is disposed in the lighting device 200, so that the thickness Y4 can be further reduced. The second surface S2 of the lighting device 200 is provided with a mounting member such as a screw. A rearwardly projecting portion may be provided above, for example a portion to which a connector is connected.

[0029] 6 and 5, in the illumination device 200, the plurality of protrusions P0 are arranged on the first light source 10. 1, a second convex portion P2 facing the second light source 102, and a third light source The light source 100 may include a third protrusion P3 facing the light source 103. The first to third light sources 101, 102, and 103 or the first to third light emitting elements may be included. 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 a point where the second light source 102 is in contact with or intersects with the second point Pb. The point in contact with or intersecting the third light source 103 may be the third point Pc. The first to Virtual circles Vc formed according to the respective curvatures of the first to third convex portions P1, P2, P3 are provided for the first to third convex portions P1, P2, P3. At this time, a virtual first straight line Ya passing through the center Px of the virtual circle Vc of the first point Pa and the first convex portion P1, and a virtual second straight line Yb passing through the center Px of the virtual circle Vc of the second point Pb and the second convex portion P2 may be parallel to each other. The second straight line Yb and a virtual third straight line Yc passing through the center Px of the virtual circle of the third point Pc and the third convex portion P3 may be parallel to each other. That is, the straight lines passing through the centers of the respective light sources 100 and the centers Px of the virtual circles Vc having the respective curvatures of the convex portions may be parallel to each other. The first point Pa may be a point where the center of the first light source 101 intersects the virtual curve Vc0. The second point Pb may be a point where the center of the second light source 102 intersects the virtual curve Vc0. A first angle V1 formed by a first tangent Vt1 intersecting the virtual curve Vc0 at the first point Pa and the first straight line Ya may be a first obtuse angle. A second angle V2 formed by a second tangent Vt2 intersecting the virtual curve Vc0 at the second point Pb and the second straight line Yb may be a second obtuse angle. A third angle V3 formed by a third tangent Vt3 intersecting the virtual curve Vc0 at the third point Pc and the third straight line Yc may be a third obtuse angle. The first to third angles V1, V2, V3 may be obtuse angles and different from each other. For example, the first to third angles may satisfy the relationship V1 < V2 < V3. That is, the angles formed by the respective straight lines passing through the centers of the respective light sources 100 and the centers (for example, Px) of the respective convex portions P0 and the respective tangents at the points where the respective light sources are tangent to the virtual curve are in one direction or the fourth plane direction. ​​​​​​​​​​ The region where the angle increases may include a region where the angle increases. It may be at least one or all of the first to third regions A1, A2, and A3. The first to third tangent lines Vt1, Vt2, and Vt3 are located at the centers of the first to third light sources 103, respectively. tangent to a virtual curve Vc0 in the first and second light sources 101 and 102 adjacent to each other. a line connecting the second and third light sources 102 and 103; a line connecting the third light source 103 and its neighbor In other words, the first to third tangent lines Vt1, Vt2, Vt3 is in the same direction as the line connecting the two adjacent light sources 101, 102, and 103. It may be extended.

[0030] A part of the light source 100 is located on a virtual circle Vc or a circumference that forms 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 disposed within a virtual circle Vc. At least a part of the third light source 103 is disposed within a virtual circle Vc passing through 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 protrusions P1, P2, and P3. The circumference of the imaginary circle Vc forming each of the protrusions P1, P2, and P3 and each of the light sources 100 or 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 with the circumference of the imaginary circle Vc that constitutes each of the protrusions P1, P2, and P3. The curvature of each of the protrusions P1, P2, and P3 is set to be equal 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 B 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 may be smaller than the maximum width of 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, and Yc passing through the vertices Pp of the first to third convex portions P1, P2, and P3 are The first to third protrusions P1, P2, and P3 are each formed by taking a normal line Lt at a vertex Pp. The light sources 1 may extend in a linear direction and have an angle Q3 of 90 degrees. 00 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 first direction Y is arranged at an angle Q4 of less than 90 degrees. The angle Q4 is 45 degrees or more. Each of the light sources 100 may be tilted at the angle Q4. The lamp housing may be arranged so as to be gradually shifted in the direction of the second surface. The concave surface S12 disposed between the convex surfaces S11 can be changed according to the surface of the bracket. The bottom point of the concave surface S12 can be separated from the imaginary curve Vc0. The apex of the protrusion P0 may be the point closest to the second surface S2 within the concave surface S12. It may be the most protruding point in the convex portion P0 or the point farthest from each light source 100. When the distance between the plurality of light sources 100 and the bottom point of the concave surface S12 is considered, the distance between the first light source 101 and the second light source 102 is The bottom point (or center) of the recessed portion C0 between the light sources 102 is closer to the first light source 102 than to the second light source 102. 1. The concave surface between the second light source 102 and the third light source 103 The bottom point (or center) of S12 is closer to the third light source 103 than to the second light source 102. That is, the light source 100 may be disposed between the two light sources 100 on the third surface S3 toward the fourth surface S4. The bottom point or center of the concave surface S12 is located at a position slightly away from the light source 100 adjacent in the direction of the third surface S3. The fourth surface can be adjacent to the adjacent light source 100 in the S4 direction.

[0031] 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, 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 straight line L3 connecting the two adjacent convex parts 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 each of the protrusions 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 protrusions 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 of the recessed portion C1 may be smallest in the third region A2. is the distance D2 between the apex of the fourth to sixth protrusions P4, P5, and P6 and the bottom point of the recess C0. The depth of the recessed portion 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. between the sources 104 and 105 or between the fifth light source 105 and the sixth light source 106, respectively. A light source 104, 105, and 106 is disposed between the light sources 104, 105, and 106 on the third surface S3 and facing the fourth surface S4. The bottom point or center of the concave surface S12 is located at a position closer to the fourth surface S1 than the fourth light source 104 adjacent to the third surface S3. The fourth light source 105 may be adjacent to the fifth light source 105 in the S4 direction. The extension portion Sc arranged in the direction of the fourth surface S4 with respect to the light source 104 as a reference is The convex surface S11 corresponds to the side surface of the fifth light source 105 and is disposed in the direction of the fourth surface S4. The extension Sc can correspond to the fifth light source 105. Such an extension of the convex surface S11 Since Sc is further extended in the direction of the second surface S2, the adjacent light sources 104, 105, and 106 The fourth to sixth light sources 104, 105, and 106 adjacent to each other can reduce the interference of light between them. The imaginary curve Vc0 or straight line Vt5 connecting the centers of the 6 is in contact with the concave surface S12. This allows the adjacent fourth to sixth light sources 104, 105, and 106 to emit The light emitted from the light source can be blocked from being emitted through the protrusions of other light sources. The extension portion Sc is a region of the convex surface S11 that is outside the region of the imaginary circle and extends to the concave surface S12. The fourth to sixth protrusions P4, P5, and P6 are provided as straight or flat sections. The straight line Vx1 connecting the center Px of the imaginary circle Vc is connected to the straight line Vt5 connecting the light source and the convex part P The line Vx1 and the line L3 connect the vertices of P4, P5, and P6. The straight lines Vx1 and Vt5 may be parallel to each other. The first and second regions A 1, A2, a straight line Vx1 connecting the center Px of the virtual circle Vc connects the concave surface S12 As shown in FIG. 8, the imaginary circle Vc The straight line Vx2 connecting the centers Px of the recessed surfaces S14 is located in the second surface direction from the straight line connecting the recessed surfaces S14. will be placed nearby.

[0032] As shown in FIG. 7, the distance D between the straight line connecting the concave surface S12 and the center Px of the imaginary circle Vc is The distance D5 may be smaller than the radius r1 of the virtual circle Vc. This structure takes into consideration the directivity angle distribution of the light sources 104, 105, and 106, and is a 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 straight line Y1a passing through the center Px and the center of the fourth light source 104, and a virtual circle V A straight line Y1b passing through the center Px of c and 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, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 06) and the center Px of the virtual circle Vc, the distance r2 is greater than the radius r1 of the virtual circle Vc. The distance r2 may be smaller than the distance between each light source and 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 protruding portion P0 is 5 mm or more, for example, 5 mm to 15 mm. In this case, the adjacent light sources 104 may have a range of 8 mm to 11 mm. , 105, 106, a virtual straight line Vt5 is formed by connecting the straight lines Y1a and Y1b. The angle V4 may be an obtuse angle. The angle V4 is larger than the angles V1, V2, and V3 in FIG. It's okay to listen.

[0033] 8 and 5, in the third region A3 adjacent to the fourth surface S4, a hypothetical convex portion P0 is formed. The straight lines Y2a, Y2b, and Y2c passing through the center of the imaginary circle Vc and the center of each light source 108 are parallel to each other. Here, a virtual line Vt6 connecting adjacent light sources 108 is aligned with the line Y Angle V5 between Y2a, Y2b, and Y2c may be an obtuse angle. Here, the angle between the first surface S4 and the protrusion P0 adjacent to the fourth surface S4 may be larger than the angle V4 between the first surface S4 and the protrusion P0 adjacent to the fourth surface S4. The seventh to ninth protrusions P7, P8, and P9 are referred to as the seventh to eighth recesses C7 and C The center Px of the imaginary circle VcX passing through the ninth convex portion P9 and the ninth light source A straight line Yx passing through the center of 109 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 S1. 4 can be gradually separated.

[0034] Here, the eighth recess portion C8 between the two protrusions P8 and P9 adjacent to the fourth surface S4 is A virtual circle Vs2 can be formed. The virtual circle Vs2 is formed by the projections P8 and P9. For example, the eighth recess C8 may have a diameter equal to or smaller than the diameter of the imaginary circle VcX. The imaginary circle Vs2 formed by the surface S14 is a circle having a diameter VcX, Vc formed by the ninth convex portion P9. The curvature of the ninth convex portion P9 and the curvature of the last convex portion P10 are provided such that the difference between them is 10% or less. The curvatures of the eighth recessed portions C8 may be the same or may have a difference of 10% or less. At this time, the distance D21 between the ninth convex portion P9 and the ninth light source 109 is the virtual circle Vs2 , may be smaller than the diameter of VcX. That is, when the ninth light source 109 is within the circumference of the imaginary circle VcX, When the radius of curvature of the concave surface S14 of the eighth recess portion C8 is maximum, the distance D21 may be smaller than the diameter of the two adjacent imaginary circles Vs2 and VcX. By providing a larger radius of curvature for the concave surface S14 in the area adjacent to the 9th convex portion P9, Light emitted from the light sources 108 and 109 arranged in the area A3 is emitted through the concave surface S14. will be done.

[0035] In the embodiment of the invention, the concave surface S14 is gradually decreased in the direction from the third surface S3 to the fourth surface S4. The curvature or curvature of the seventh and eighth recesses C7, C8 gradually increases or the fourth surface S4 The curvature of the adjacent concave surface S14 or the eighth recessed portion C8 is the largest among the curvatures of the concave surfaces or recessed portions. This is because the area of ​​the convex portion becomes smaller toward the third region A3 or the area of ​​the convex portion becomes smaller toward the third region A4. This is because the convex portion gradually increases in the second surface direction with respect to the second direction X. By moving the convex portion, the curvature of the connecting section of the convex portion can be gradually reduced. The radius of curvature of S14 or the recessed portion C0 (C7, C8) gradually increases as it approaches the fourth surface S4. When we look at the last ninth convex part P9 and the seventh convex part P7 separated from it, we can see that the imaginary circle Vc The contact area with the circumference of the ninth convex portion P9 can be gradually decreased. For example, the contact area between a virtual circle VcX passing through the ninth convex portion P9 and the outer edge of the ninth convex portion P9 is It may be less than 1 / 3 or 1 / 4 of the circumference of the virtual circle VcX. In FIG. 6, the contact area between a virtual circle Vc passing through the first protrusion P1 and the outer edge of the first protrusion P1 is , may have a length equal to or greater than 1 / 2 or 1 / 3 of the circumference of the imaginary circle Vc. This is because the diameter of the imaginary circle Vc is the same, and the surface of the convex surface S13 becomes smaller as it approaches the ninth convex portion P9. The area of ​​the concave surface S14 can be gradually increased. The difference in curvature between the convex surface S13 and the concave surface S13 is gradually reduced as the surface moves in the direction of the arrow. Thus, each light source 100 in the third area A3 arranged on the virtual curve Vc0 is A1 can irradiate light in the same direction as each of the light sources 100 in the third region. The depth of the seventh and eighth recesses C7 and C8 at A3 gradually decreases in the direction toward the fourth surface S4. As shown in FIG. 5 and FIG. 8, the concave surface may be formed so that the concave surface is gradually decreased in the direction of the fourth surface S4. The size of the circle of the image gradually increases, or the concave surface of the image gradually decreases as the image moves toward the third surface S3. The size of the imaginary circle may gradually decrease.

[0036] FIG. 9 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 focused on a target point Ta. The centers of the light sources 100, 101A, and 101D and the protrusion P21 are aligned with the target surface. 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 light sources 100, 101A, and 101D are inclined. A straight line passing through the center of the convex surface S15 and the center of each of the light sources 100, 101A, and 101D is a target The distance between the target point Ta and each of the convex portions P21 can be set to 1. The distance can vary depending on the type of lamp.

[0037] 10A and 10B show the arrangement of a virtual circle Vc having a convex portion Pk1 at the center Dx of each light source 102A. The center Px is aligned, and (A) is the center Dx of the light source 102A aligned with the line of the imaginary circle Vc or In (B), the light source center Dx is placed on the line or circumference of an imaginary circle Vc. This is done according to the emission angle of each light source 102A and the curvature radius of each convex portion Pk1. The position of each light source 102A and the size K1 of each light source 102A can be adjusted.

[0038] In (A) and (B) of FIG. 11, the light source 102B is a large-sized light source similar to the light source 102A disclosed in FIG. The light source may have a size K2 smaller than the size K1. In FIG. 11, the size of the light source is 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. 10, the size K1 of the long side of the light source 102A is 5 mm or more, for example, 5 mm to 7 mm range, which depends on 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.

[0039] In (A) and (B) of FIG. 12, 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 narrower. In this case, the elliptical shape is such that the length in the direction perpendicular to the emission direction of the light source 103A is equal to the emission direction of the light source 103A. It may be greater than the length in the projection direction.

[0040] In (A) and (B) of FIG. 13, 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 its height. k3 or the distance between the convex surface S33 and the light source 103A can be larger. The elliptical shape at this time has a length in the direction perpendicular to the emission direction of light source 103A that is longer than the emission direction of light source 103A. It may be smaller than the length of the direction.

[0041] In (A) and (B) of FIG. 14, the curve of the convex portion Pk4 includes an aspheric shape, and the center Dx of the light source is an aspheric 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 the light to prevent hot spots at the center. , the light extraction efficiency at the edge side can be further increased.

[0042] 15A to 15E 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 according to the difference in the distance between the resin layer and the substrate. 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 collection.

[0043] 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. The distribution is higher. That is, the distance between the center Dx of the light source 100 and the center Px of the virtual circle Vc If the center of the imaginary circle V70 or the convex part P71 is 0, then in (A) the distance r2 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 in (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.

[0044] FIG. 16 is a diagram showing the output angle according to the central position of the light source and the convex portion in an embodiment of the invention. Referring to FIG. 16, the light source according to Snell's law for each convex portion or convex surface S11 is 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 exit angle at the convex surface S11 are calculated using parameters such as the refractive index, the external refractive index, etc. The angle of incidence can be calculated.

[0045] Here, N1 is the refractive index of air, N2 is the refractive index of the resin layer, and N2 is the refractive index of the resin layer, which is 1.2 to 1.7. According to Snell's law, θ1 is the angle of the tangent line passing through an imaginary circle. N1×sinθ is the angle of incidence based on the normal, and θ2 is the angle of emergence based on the normal. 1=N2×sinθ2, and N1 is calculated using the formula N1=sinθ2 / sinθ1. Here, the emission angle θ1 can be calculated by a trigonometric function, and θ2 can be calculated by the above θ1, the distance a between the light source and the center Px of the virtual circle Vc, and each parameter h, α, β, b, It can be calculated by first calculating r2 and then applying Snell's law. Since the light distribution changes depending on the focal length, the distance a between the light source position and the center of the convex part is adjusted according to the focal length distribution. It is possible to save money.

[0046] As shown in FIG. 17, 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 downward or toward the substrate, or conversely, it bends upward or As shown in FIG. 18, the illumination device according to the embodiment can be bent in a convex shape toward the first reflective layer. The position of the reflector 1 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 adjacent to the bulging region. The substrate may include at least one recessed region recessed toward the substrate. The recessed regions are arranged in alternating fashion.

[0047] The above disclosed embodiments, modifications or alternative examples may be selectively mixed with each other or with the alternative examples. The structure may be changed, and the above-disclosed embodiments may be selectively applied to each embodiment. In addition, the second, third and fourth surfaces S2, S3 and S4 of the resin layer 220 except for the first surface are A reflective layer or reflective film made of a resin material may be attached to the light source. The reflective film can block light leakage from the non-emission area.

[0048] An embodiment of the invention provides a lighting device having a resin layer 220 thickness of 3 mm or less. When the resin layer 220 is provided to be thick, for example, 3 mm to 6 mm, the light emitting area increases due to the increase in thickness of the resin layer 220. The illumination device according to the embodiment of the invention has a lamp as shown in FIG. The lamps can be applied to a vehicle, for example, a head lamp, a vehicle width lamp, a vehicle rear ... Lights, side mirror lights, fog lights, tail lights, brake lights, daytime running lights, vehicle interior Applicable to lighting, door scuffs, rear combination lamps or backup lamps It is.

[0049] Referring to FIG. 19, the lamp is a housing having an inner lens 502. The lighting device 200 has the first and second light sources 101 and 103 disclosed above in the housing 503. 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 set to a value that can be inserted into the light exit portion 515 of the lighting device. The thickness of the light emitting device 200 may be equal to or less than twice the thickness of the light emitting device 200, and the decrease in the luminous intensity can be prevented. The inner lens 502 is disposed at a predetermined distance, for example, 10 mm, from the front surface of the lighting device 200. The inner lens 502 is provided on the light-emitting side thereof with an outer lens 503. The lamp having such a lighting device 200 is an example. The lamp is applied to a flexible structure, for example, a curved surface or a curved structure when viewed from the side. It is possible.

[0050] 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 those skilled in the art to which the present invention pertains. The present invention can be implemented in combination or modification with the above examples. should be construed as being within the scope of the present invention.

Claims

1. A substrate; A plurality of light sources disposed on the substrate; a resin layer disposed on the substrate and the plurality of light sources; a first reflective layer disposed on the resin layer; the resin layer includes an exit surface facing the light source, the emission surface of the resin layer includes a plurality of convex portions, The plurality of light sources are arranged on an imaginary curve, and a first light source and a second light source adjacent to each other are arranged on the imaginary curve. Including, The plurality of protrusions include a first protrusion facing the first light source and a second protrusion facing the second light source. Includes two protruding portions, The first point where the first light source and the imaginary curve are in contact passes through the center of the circle formed by the first convex portion. The second convex portion does not exist at a second point where a virtual first straight line, the second light source and the virtual curved line are in contact with each other. Imaginary second straight lines passing through the centers of the cones are parallel to each other, The angle between the first tangent line that is tangent to the imaginary curve at the first point and the first straight line is a first obtuse angle. Lighting devices, including horns.

2. A substrate; a light source disposed above the substrate; a resin layer disposed on the substrate and the light source; a first reflective layer disposed on the resin layer; the resin layer includes an exit surface facing the light source, The light source includes a plurality of light emitting elements, the light emitting surface of the resin layer includes a plurality of convex portions corresponding to the plurality of light emitting elements, Each of the plurality of light-emitting elements is disposed on an imaginary curve, The difference in diameter between the imaginary circles formed by the plurality of protrusions is within 10%. , lighting equipment.

3. A substrate; a light source disposed above the substrate; a resin layer disposed on the substrate and the light source; a first reflective layer disposed on the resin layer; the resin layer includes an exit surface facing the light source, The light source includes a plurality of light emitting elements, the light emitting surface of the resin layer includes a plurality of convex portions corresponding to the plurality of light emitting elements, Each of the plurality of light-emitting elements is disposed on an imaginary curve, A circle passing through the center of an imaginary circle formed by each of the plurality of light emitting elements and each of the plurality of protrusions is A plurality of straight lines are included, Each of the plurality of straight lines and each of the plurality of light emitting elements are tangent to the imaginary curve. The first angle between the tangents at the points includes an area that increases in one direction. 。

4. The angle between the second tangent line that is tangent to the imaginary curve at the second point and the second straight line is a second obtuse angle. Including the corners, The lighting device of claim 1 , wherein the second obtuse angle is greater than the first obtuse angle.

5. the plurality of light sources includes a third light source disposed on the imaginary curve; the plurality of protrusions includes a third protrusion facing the third light source, A third point where the third light source and the virtual curve are in contact passes through the center of a circle formed by the third convex portion. The imaginary third straight line and the second straight line are parallel to each other, The angle between the third tangent line that is tangent to the imaginary curve at the third point and the third straight line is a third obtuse angle. Including the corners, The lighting device of claim 4 , wherein the third obtuse angle is greater than the second obtuse angle.

6. The imaginary curve is a curve including a center of the first light source, a center of the second light source, and a center of the third light source. The lighting device according to claim 5 .

7. the curvatures of the imaginary circles formed by the plurality of protrusions are identical to each other; 7. The method according to claim 1, wherein the plurality of convex portions include a hemispherical, elliptical, or aspherical shape. Item 2. A lighting device according to item 1.

8. 7. The method according to claim 1, wherein the diameter of a circle formed by the convex portion is greater than the thickness of the resin layer.

13. The lighting device according to claim 1 .

9. Each of the plurality of light sources is disposed within a virtual circle formed by the convex portion facing the light source. The lighting device according to claim 1 , 4 to 6 .

10. a second reflective layer disposed between the resin layer and the substrate; 7. The method according to claim 1, wherein the thickness of the resin layer is smaller than the distance from the rear surface to the light exit surface.

3. The lighting device according to claim 1 .

11. The maximum distance from the center of each of the light-emitting elements to each of the protrusions is the same, each of the plurality of light-emitting elements is disposed on a circumference of the imaginary circle; A plurality of straight lines passing through the centers of the respective light emitting elements and the respective centers of the imaginary circles are arranged.

4. An illumination device according to claim 2 or 3, wherein the lines are parallel to one another.

12. The plurality of light-emitting elements include first to third light-emitting elements, the plurality of protruding portions include first to third protruding portions, The plurality of straight lines include first to third straight lines, the plurality of tangents include first to third tangents, the first angle formed by the first straight line and the first tangent is a first obtuse angle, the first angle formed by the second straight line and the second tangent is a second obtuse angle; the first angle formed by the third straight line and the third tangent is a third obtuse angle, 3. The method according to claim 2, wherein the second obtuse angle is greater than the first obtuse angle and less than the third obtuse angle.

4. The lighting device according to claim 3.

13. The straight line connecting the adjacent light emitting elements has an inclination with respect to a horizontal line.

3. The lighting device according to claim 3.

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