Lighting device and lamp including same

Abstract

The lighting device disclosed in the examples includes a substrate, a light source unit arranged on the substrate, a resin layer arranged on the substrate and covering the light source unit, a light-shielding layer arranged on the resin layer and having an opening, and an optical layer arranged on the light-shielding layer, wherein the light source unit includes a plurality of first light sources arranged in a first region of the resin layer and a plurality of second light sources arranged in a second region of the resin layer, and the resin layer includes a groove arranged between the first and second regions.

Description

[Technical Field]

[0001] The embodiments relate to a lighting device capable of providing a stereoscopic image and a lamp including the same. [Background technology]

[0002] Lighting devices, which provide light and adjust the amount of light, are used in a variety of fields. For example, lighting devices are applied to various fields, such as vehicles and buildings, to brighten the interior or exterior of a room. Recently, light-emitting devices have been used as lighting sources. Compared to existing light sources such as fluorescent lamps and incandescent lamps, light-emitting diodes (LEDs) have advantages such as low power consumption, a semi-permanent lifespan, fast response time, safety, and environmental friendliness. Light-emitting diodes are applied to various optical assemblies, such as various display devices and interior and exterior lights. Vehicles generally use lamps of various colors and shapes, and recently, lamps using light-emitting diodes as vehicle light sources have been proposed. For example, light-emitting diodes are applied to vehicle headlights, taillights, turn signals, and the like. However, light-emitting diodes have a problem in that the angle of light emitted from the light is relatively small. Therefore, when light-emitting diodes are used as vehicle lamps, there is a demand for an increased luminous area.

[0003] When a lamp includes such light-emitting diodes, heat generated when the light-emitting diodes emit light can degrade the performance of the light-emitting diodes or reduce the uniformity of the light emitted. Furthermore, hot spots can be formed due to the light emitted from the light-emitting diodes. In this case, when a surface light source is realized using the lamp, the uniformity of the light-emitting surface can be reduced. Generally, when light-emitting diodes are used in vehicle lamps, the light-emitting diodes are visible from the outside. For example, when the vehicle lamp is turned on, the light emitted from the light source makes the light invisible. However, when the lamp is turned off, the light-emitting diodes are visible from the outside, reducing the aesthetic appeal and design freedom of the lamp. Therefore, a new lighting device and lamp that can solve the above problems are needed. Light-emitting diodes emit light in the form of a point light source, and one light-emitting diode is required for each individual image of a three-dimensional lighting system. Therefore, multiple light-emitting diodes are required to realize multiple individual images. Furthermore, when the same light-emitting diodes are used, the width of each individual image of the three-dimensional lighting system is the same, which limits the diversity of images. Therefore, when light emitting diodes are used as vehicle lamps, there is a limit to how many light emitting diodes can be reduced to realize various images. Therefore, a new lighting device and lamp that can solve the above problems is required. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments aim to provide a lighting device and a lamp that can provide a uniform point light source through an opening. The embodiments aim to provide a lighting device and a lamp that can provide one or more stereoscopic images. The embodiments aim to provide a lighting device and a lamp that can provide stereoscopic images having various shapes. [Means for solving the problem]

[0005] An illumination device according to an embodiment includes a substrate, a light source unit arranged on the substrate, a resin layer arranged on the substrate and covering the light source unit, a light-shielding layer arranged on the resin layer and having an opening, and an optical layer arranged on the light-shielding layer, wherein the light source unit includes a plurality of first light sources arranged in a first region of the resin layer and a plurality of second light sources arranged in a second region of the resin layer, and the resin layer includes a groove arranged between the first and second regions.

[0006] According to an embodiment of the invention, the resin layer may include first and second side surfaces facing a second direction and third and fourth side surfaces facing the first direction, the first direction being perpendicular to the second direction, an emitting surface of each of the plurality of first light sources facing the first side surface of the resin layer, and an emitting surface of each of the plurality of second light sources facing the second side surface of the resin layer. The plurality of first light sources are disposed between the first side surface of the resin layer and the groove, and the plurality of second light sources are disposed between the second side surface of the resin layer and the groove.

[0007] According to an embodiment of the invention, the resin layer may include a connecting portion disposed between the first and second regions and connecting the first and second regions, and the length of the connecting portion in the first direction may be 2 mm.

[0008] According to an embodiment of the invention, the plurality of first light sources are spaced apart from one another in a first direction, the plurality of second light sources are spaced apart from one another in the first direction, the plurality of first light sources are arranged in a row, and the plurality of second light sources are arranged in a row.

[0009] According to an embodiment of the invention, the length of the groove in the first direction may be longer than the length of the region in which the plurality of first light sources are arranged, and the length of the region in which the plurality of first light sources are arranged in the first direction may be the length in the first direction from one end of an initially arranged light source among the plurality of first light sources to the other end of a last arranged light source. The opening may include a plurality of first openings arranged with regularity and a plurality of second openings spaced apart from the plurality of first openings with regularity. Each of the plurality of second openings is arranged in a region corresponding to the plurality of first openings in the second direction. Each of the plurality of second openings is arranged in a region corresponding to a region between the plurality of first openings spaced apart in the first direction and a region corresponding to the second direction. The opening may further include a plurality of third openings arranged in a central region of the light-shielding layer, and the plurality of third openings may overlap the groove in a vertical direction, and the vertical direction may be orthogonal to the first and second directions.

[0010] An illumination device according to an embodiment includes a substrate, a light source unit arranged on the substrate, a resin layer arranged on the substrate and covering the light source unit, a light-shielding layer arranged on the resin layer and having openings, and an optical layer arranged on the light-shielding layer, wherein the openings include a plurality of first openings arranged with a regularity, and light emitted from the light source unit is transmitted to the optical layer through the plurality of first openings, passes through the optical layer and is emitted to the outside.

[0011] According to an embodiment of the invention, the light source unit may include a plurality of first light sources arranged in a first region of the resin layer, and the number of the plurality of first openings may be greater than the number of the plurality of first light sources.

[0012] According to an embodiment of the invention, at least one of the plurality of first openings includes a first unit opening, a third unit opening spaced apart from the first unit opening in a first direction, and a second unit opening arranged between the first and third unit openings and connecting the first and third unit openings, wherein the lengths of the first to third unit openings in the first direction are the same, the length of the second unit opening in the second direction is greater than the length of the first unit opening, and the length of the third unit opening is greater than the length of the second unit opening, and the second direction is perpendicular to the first direction.

[0013] According to an embodiment of the invention, the resin layer may include a second region separated from the first region, a groove disposed between the first and second regions, and a connecting portion disposed between the first and second regions and connecting the first and second regions.

[0014] According to an embodiment of the invention, the opening includes a plurality of second openings arranged with a regularity, the plurality of second openings being disposed in regions between the plurality of first openings spaced apart in a first direction and in regions corresponding to the second direction, the second direction being perpendicular to the first direction. A virtual line may be included connecting centers of the plurality of first openings, and the length in the second direction between each of the plurality of second openings and the virtual line may be different. The length in the second direction between each of the plurality of second openings and the virtual line may decrease from the first light source to the last light source among the plurality of second light sources. The opening may further include a third opening disposed in a central region of the light-blocking layer. Light emitted from the light source unit is transmitted to the optical layer through the opening, and a light pattern formed by passing through the optical layer may have a linear shape.

[0015] According to an embodiment of the invention, the display device may further include a reflective layer disposed between the substrate and the resin layer, and the reflective layer may overlap the opening in a vertical direction.

[0016] According to an embodiment of the invention, the opening does not overlap the light source unit in the vertical direction. The opening may partially overlap the light source unit in the vertical direction. According to an embodiment of the invention, the light-shielding layer and the optical layer may be spaced apart.

[0017] An illumination device according to an embodiment includes a substrate, a light source unit disposed on the substrate, a resin layer disposed on the substrate and covering the light source unit, a light-shielding layer disposed on the resin layer and including an opening, and an optical layer disposed on the light-shielding layer, wherein the optical layer includes a plurality of optical patterns having a major axis in the direction of the light-emitting surface of the light source unit, the opening including a plurality of openings, light emitted from the light source unit enters the optical layer through the openings, and the light pattern formed by passing through the optical layer includes a linear shape, and the number of the linear shapes may be smaller than or equal to the number of the plurality of openings.

[0018] According to an embodiment of the invention, the linear shape may include a curve, and a width of the light pattern having the linear shape may vary depending on the width of the opening. According to an embodiment of the invention, the opening may include a plurality of first openings regularly arranged in a first direction and a plurality of second openings regularly arranged in the first direction. The plurality of second openings are arranged in a region corresponding to the plurality of first openings and the second direction, and the second direction is a direction perpendicular to the first direction. The plurality of second openings are arranged in a region corresponding to the second direction and a region between the plurality of first openings spaced apart in the first direction, and the second direction is a direction perpendicular to the first direction. The length in the first direction of at least one first opening of the plurality of first openings may be greater than the length in the first direction of at least one second opening of the plurality of second openings.

[0019] According to an embodiment of the invention, light emitted from the light source unit is transmitted to the optical layer through the first opening, and the light pattern formed by passing through the optical layer has a shape extending from one side of the resin layer adjacent to the first opening toward the other side opposite to the one side, and in the light pattern, the width in the first direction of the region adjacent to one side of the resin layer may be larger than the width in the first direction of the region adjacent to the other side of the resin layer.

[0020] According to an embodiment of the invention, the opening portion may include at least one third opening disposed in a region between the first and second openings and in a central region of the light-shielding layer, and a portion of the light emitted from the light source portion may be transmitted to the optical layer through the third opening, and a light pattern formed by passing through the optical layer may have a shape symmetrical with respect to the central region of the light-shielding layer. The third openings are disposed in regions corresponding to regions between the plurality of first openings spaced apart in the first direction and in a second direction, and the second direction is perpendicular to the first direction. [Effects of the Invention]

[0021] The lighting device and lamp according to the embodiments can provide one or more stereoscopic images. Specifically, the lighting device can include the lighting module and an optical layer disposed on the lighting module. The lighting module can include one or more openings, and light emitted through the openings is provided as one or more linear stereoscopic images via the optical layer. The lighting device and lamp according to the embodiments can provide stereoscopic images having various shapes. Specifically, the lighting device according to the embodiments can control the number, shape, size, position, etc. of the openings. As a result, the stereoscopic images passing through the optical layer can have various widths, lengths, luminous intensities, and shapes.

[0022] The lighting device and lamp according to the embodiments may have improved light characteristics. Specifically, the lighting device and lamp include a lighting module including a light source unit and a resin layer sealing the light source unit, and the resin layer can effectively guide the light emitted from the light source unit. As a result, the lighting module can provide light with uniform intensity. In particular, the lighting device according to the embodiments can provide a uniform surface light source in the upper direction of the lighting module. Therefore, the lighting module can emit a point light source with uniform intensity through the openings regardless of the number, position, etc. of the openings.

[0023] The resin layer of the lighting device according to the embodiment may include a groove extending in one direction between the plurality of light sources. In this case, the groove may be longer than the length of the one direction in which the plurality of light sources are arranged. That is, the groove may divide the regions of the resin layer and prevent or minimize light guided in each region of the resin layer from moving to another region. As a result, the lighting device may prevent light from mixing in the plurality of regions and provide a clearer three-dimensional image.

[0024] The lighting device according to the embodiment may have a thickness that is set depending on the included structure, so that the lighting device can be provided in a flexible form and can be applied to lamp housings, brackets, etc. having various curved shapes. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 is a top view of a lighting device according to an embodiment. [Figure 2] FIG. 10 is a top view of a resin layer of the lighting device according to the example. [Figure 3] FIG. 1 is a cross-sectional view of a lighting device according to an embodiment. [Figure 4] FIG. 4 is an enlarged cross-sectional view of an area of ​​FIG. 3. [Figure 5] 3 is a cross-sectional view of an optical layer of the lighting device according to the embodiment. FIG. [Figure 6]FIG. 10 is another cross-sectional view of the lighting device according to the embodiment. [Figure 7] FIG. 10 is another cross-sectional view of the lighting device according to the embodiment. [Figure 8] FIG. 10 is another cross-sectional view of the lighting device according to the embodiment. [Figure 9] FIG. 10 is another cross-sectional view of the lighting device according to the embodiment. [Figure 10] FIG. 10 is another cross-sectional view of the lighting device according to the embodiment. [Figure 11] FIG. 10 is another cross-sectional view of the lighting device according to the embodiment. [Figure 12] 10 is a diagram illustrating various openings in a light-blocking layer in a lighting device according to an embodiment; [Figure 13] 10 is a diagram illustrating various openings in a light-blocking layer in a lighting device according to an embodiment; [Figure 14] 10 is a diagram illustrating various openings in a light-blocking layer in a lighting device according to an embodiment; [Figure 15] 10 is a diagram illustrating various openings in a light-blocking layer in a lighting device according to an embodiment; [Figure 16] 10 is a diagram illustrating various openings in a light-blocking layer in a lighting device according to an embodiment; [Figure 17a] 10A and 10B are diagrams illustrating three-dimensional images formed according to various opening shapes in the lighting device according to the embodiment; [Figure 17b] 10A and 10B are diagrams illustrating three-dimensional images formed according to various opening shapes in the lighting device according to the embodiment; [Figure 18a] 10A and 10B are diagrams illustrating three-dimensional images formed according to various opening shapes in the lighting device according to the embodiment; [Figure 18b] 10A and 10B are diagrams illustrating three-dimensional images formed according to various opening shapes in the lighting device according to the embodiment; [Figure 19a] 10A and 10B are diagrams illustrating three-dimensional images formed according to various opening shapes in the lighting device according to the embodiment; [Figure 19b] 10A and 10B are diagrams illustrating three-dimensional images formed according to various opening shapes in the lighting device according to the embodiment; [Figure 20a] 10A and 10B are diagrams illustrating three-dimensional images formed according to various opening shapes in the lighting device according to the embodiment; [Figure 20b] 10A and 10B are diagrams illustrating three-dimensional images formed according to various opening shapes in the lighting device according to the embodiment; [Figure 21] 1 is a diagram illustrating an example in which a lamp including a lighting device according to an embodiment is applied to a vehicle. [Figure 22] 1 is a diagram illustrating an example in which a lamp including a lighting device according to an embodiment is applied to a vehicle. [Figure 23] 1 is a diagram illustrating an example in which a lamp including a lighting device according to an embodiment is applied to a vehicle. DETAILED DESCRIPTION OF THE INVENTION

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0027] The technical concept of the present invention is not limited to some of the described embodiments and may be embodied in various forms. Elements of the embodiments may be selectively combined or substituted within the scope of the technical concept of the present invention. Furthermore, terms (including technical and scientific terms) used in the embodiments of the present invention, unless expressly specified, shall be interpreted as having meanings commonly understood by those skilled in the art to which the present invention pertains. Commonly used terms, such as dictionary-defined terms, shall be interpreted in light of the context of the relevant technology. Furthermore, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention. In this specification, the singular form "a," "an," or "an" may also include the plural form unless otherwise specified. For example, "at least one (or more) of A and B and C" refers to one or more of all possible combinations of A, B, and C. Furthermore, when describing elements of the embodiments of the present invention, terms such as "first," "second," "A," "B," "(a)," and "(b)" may be used. These terms are used to distinguish elements from other elements, and do not limit the nature or order of the elements. Furthermore, when a component is described as being "coupled," "coupled," or "connected" to another component, this includes both cases where the component is directly coupled or connected to the other component, and cases where further components are "coupled," "coupled," or "connected" between the components. Furthermore, when a component is described as being formed or located "above or below" another component, "above or below" does not only include cases where the two components are in direct contact, but also cases where one or more further components are formed or located between the two components. Furthermore, when the term "above or below" is used, it can mean not only the upper direction but also the lower direction based on one component.

[0028] The lighting device of the present invention can be applied to various lamp devices requiring illumination, such as vehicle lamps, household optical assemblies, and industrial optical assemblies. For example, when applied to vehicle lamps, it can be used for headlamps, side mirror lights, side marker lights, fog lamps, tail lamps, brake lights, daytime running lights, vehicle interior lighting, door scuffs, rear combination lamps, and backup lamps. When applied to vehicle lamps, it can also be used for rear side support systems (BSDs) located on side mirrors or A-pillars. The optical assembly of the present invention can also be used in indoor and outdoor advertising devices, display devices, and various train applications.

[0029] Before describing the embodiments of the present invention, the first direction may refer to the x-axis direction in the drawings, the second direction may refer to the y-axis direction in the drawings, and the third direction may refer to the z-axis direction in the drawings. Furthermore, the horizontal direction may refer to the first and second directions, and the vertical direction may refer to the third direction as a direction perpendicular to at least one of the first and second directions. For example, the horizontal direction may refer to the x-axis and y-axis directions in the drawings, and the vertical direction is the z-axis direction in the drawings, a direction perpendicular to the x-axis and y-axis directions.

[0030] Fig. 1 is a top view of a lighting device according to an embodiment, Fig. 2 is a top view of a resin layer of the lighting device according to an embodiment, Fig. 3 is a cross-sectional view of the lighting device according to an embodiment, Fig. 4 is an enlarged cross-sectional view of a region of Fig. 3, and Fig. 5 is a cross-sectional view of an optical layer of the lighting device according to an embodiment.

[0031] 1 to 5, a lighting device 1000 according to an embodiment may include an illumination module including a substrate 100, a light source unit 200, a resin layer 410, and a light-shielding layer 500, and an optical layer 700 disposed on the illumination module. The illumination module may provide point light having uniform point intensity. For example, light emitted from the light source unit 200 and passing through the resin layer 410 may be emitted in the form of a surface light source having uniform intensity. The light-shielding layer 500, which includes one or more openings, is disposed on the resin layer 410. As a result, light passing through the resin layer 410 and the light-shielding layer 500 may be emitted in the form of a point light source having uniform intensity corresponding to the openings. The point light source is then transmitted to the optical layer 700 disposed on the illumination module, and the light passing through the optical layer 700 is emitted in the form of a three-dimensional image. In this case, the three-dimensional image is an image that is perceived by a human being when viewed from outside the lighting device 1000, and is realized as a contrast of light and dark having a difference between the brightest and darkest areas, or a three-dimensional effect can be given using the depth or difference in luminance.

[0032] The lighting module may have a predetermined thickness. The thickness of the lighting module may be about 5 mm or less in the third direction (z-axis direction) from the lower surface of the substrate 100 to the upper surface of the light-blocking layer 500. More specifically, the thickness of the lighting module may be about 2 mm to about 5 mm. If the thickness of the lighting module is less than about 2 mm, the reliability of the lighting module may be reduced. Also, if the thickness of the lighting module exceeds about 5 mm, it may be difficult to provide the lighting module in a flexible form, and therefore difficult to apply to lamp housings, brackets, etc. having various curved shapes.

[0033] The configuration of the lighting device 1000 will now be described in more detail.

[0034] The substrate 100 may include a printed circuit board (PCB) having wiring. The substrate 100 may include, for example, a resin-based printed circuit board (PCB), a metal-core PCB, a flexible PCB, a non-flexible PCB, a ceramic PCB, or an FR-4 substrate. A wiring layer (not shown) is disposed on the substrate 100. The wiring layer is electrically connected to the light source unit 200. For example, when the light source unit 200 includes multiple light sources, the multiple light sources may be connected in series, parallel, or series-parallel by the wiring layer. The substrate 100 is disposed below the light source unit 200 and the resin layer 410 and may function as a base member or a support member. The substrate 100 may have a thickness of about 100 μm to about 2 mm. Specifically, the substrate 100 may have a thickness of about 150 μm to about 1.8 mm. More specifically, the substrate 100 may have a thickness of about 200 μm to about 1.6 mm. If the substrate 100 has a thickness of less than about 100 μm, it may be difficult to effectively support components disposed on the substrate 100, such as the light source unit 200 and the resin layer 410. Furthermore, the substrate 100 may be too thin, resulting in reduced reliability. Furthermore, if the thickness of the substrate 100 exceeds about 2 mm, the overall thickness of the lighting device 1000 increases and the flexibility of the substrate 100 decreases. Therefore, it is preferable that the substrate 100 satisfies the above range.

[0035] The substrate 100 may further include a connector (not shown) disposed on a portion thereof. The substrate 100 may provide power to the light source unit 200 via the connector. The connector is formed on at least one region of the upper surface or the lower surface of the substrate 100. For example, when the connector is disposed on the upper surface where the light source unit 200 and the resin layer 410 are disposed, the connector is disposed on an area of ​​the substrate 100 where the resin layer 410 is not disposed. On the other hand, when the connector is disposed on the lower surface of the substrate 100, the resin layer 410 is disposed on the entire upper surface or 80% or more of the upper surface of the substrate 100.

[0036] The light source unit 200 is disposed on the substrate 100. For example, the light source unit 200 is disposed on an upper surface of the substrate 100 facing the light-shielding layer 500. The light source unit 200 may emit light in at least one direction. The light source unit 200 may emit light toward a side of the resin layer 410. The light source unit 200 may include an LED chip and be provided in a side-view package, and the light-emitting surface of the light source unit 200 may face the side of the resin layer 410. In this case, the LED chip may include at least one of a blue LED chip, a red LED chip, and a green LED chip. Each of the packages may include an LED chip of one color, multiple LED chips of the same color, or multiple LED chips of different colors.

[0037] The light source unit 200 may include a first light source 210 and a second light source 220. The first light source 210 is disposed in a first region A1 of the resin layer 410. The first light source 210 is disposed facing a first side surface S1 of the resin layer 410. More specifically, the first light source 210 is disposed such that a light emitting surface of the first light source 210 faces the first side surface S1 of the resin layer 410. The first light source 210 may emit light toward the first side surface S1. A plurality of the first light sources 210 are provided on the substrate 100. The plurality of first light sources 210 are spaced apart from each other and arranged in a row on the substrate 100. For example, the plurality of first light sources 210 may include a 1-1 light source 210a, a 1-2 light source 210b, a 1-3 light source 210c, and a 1-4 light source 210d spaced apart from each other in a first direction (x-axis direction) and arranged in a row as shown in the drawing. In this case, the 1-1 light source 210a is the first light source 210 arranged among the first light sources 210, and the 1-4 light source 210d is the last light source 210 arranged among the first light sources 210. The second light source 220 is arranged in a second region A2 separated from the first region A1 of the resin layer 410. The second region A2 is a region separated from the first region A1 in the second direction (y-axis direction). The second light source 220 is arranged so that the other side of the second light source 220 faces the first side surface S1 of the resin layer 410. The second light source 220 is arranged so that the second side surface S2 of the resin layer 410 faces the first side surface S1 in the second direction (y-axis direction). More specifically, the second light source 220 is arranged so that the light emitting surface of the second light source 220 faces the second side surface S2 of the resin layer 410. The second light source 220 can emit light toward the second side surface S2.

[0038] A plurality of second light sources 220 are provided on the substrate 100. The number of second light sources 220 may be the same as the number of first light sources 210. The second light sources 220 may be spaced apart from one another and arranged in a row on the substrate 100. For example, the plurality of second light sources 220 may include a 2-1 light source 220a, a 2-2 light source 220b, a 2-3 light source 220c, and a 2-4 light source 220d spaced apart from one another in a first direction and arranged in a row as shown in the drawing. In this case, the 2-1 light source 220a is the first of the second light sources 220, and the 2-4 light source 220d is the last of the second light sources 220. However, the embodiment is not limited thereto, and the number of the plurality of second light sources 220 may be more or less than the number of first light sources 210. The second light sources 220 are arranged in areas corresponding to the first light sources 210. For example, the second light sources 220 are arranged in areas corresponding to the first light sources 210 in the second direction (y-axis direction). Alternatively, the second light sources 220 are arranged in areas corresponding to the second direction and between the first light sources 210 spaced apart in the first direction. That is, when viewed from above, the first light sources 210 and the second light sources 220 are arranged in a zigzag pattern.

[0039] The plurality of first light sources 210 and the plurality of second light sources 220 may emit light simultaneously. For example, when power is applied to the light source unit 200, the plurality of first light sources 210 may emit light toward the first side surface S1, and the plurality of second light sources 220 may emit light toward the second side surface S2. Alternatively, the first light source 210 and the second light source 220 may emit light independently. For example, when power is applied to the light source unit 200, one selected from the first light source 210 or the second light source 220 may emit light toward a corresponding side surface of the resin layer 410. Alternatively, the light sources included in each of the plurality of first light sources 210 and the plurality of second light sources 220 may emit light independently. For example, when power is applied to the light source unit 200, each of the plurality of first light sources 210 and each of the plurality of second light sources 220 may emit light independently. As a result, the lighting device 1000 according to the embodiment can control all or selectively the plurality of light sources included in the light source unit 200, and can provide a stereoscopic image that can provide various shapes and various motions.

[0040] The resin layer 410 is disposed on the substrate 100. The resin layer 410 is disposed on the upper surface of the substrate 100. The resin layer 410 may be disposed on the entire upper surface of the substrate 100 or on a partial region thereof. The resin layer 410 may be made of a transparent material. The resin layer 410 may include a resin material such as silicone or epoxy. The resin layer 410 may include a thermosetting resin material, such as PC, OPS, PMMA, or PVC. The resin layer 410 may be made of glass, but is not limited thereto. For example, the resin layer 410 may be primarily made of a resin material containing urethane acrylate oligomer as its main raw material. For example, a mixture of urethane acrylate oligomer, which is a synthetic oligomer, and a polymer type such as polyacrylic may be used. Of course, a monomer containing low-boiling point dilution type reactive monomers such as IBOA (isobornyl acrylate), HPA (hydroxylpropyl acrylate), and 2-HEA (2-hydroxyethyl acrylate) may be further included, and a photoinitiator (e.g., 1-hydroxycyclohexyl phenyl-ketone) or an antioxidant may be added as an additive.

[0041] The resin layer 410 is provided as a resin layer for guiding light, and therefore can be provided with a thinner thickness than glass and as a flexible plate. The resin layer 410 can emit point light emitted from the light source unit 200 in the form of a line light source or a surface light source. The upper surface of the resin layer 410 can diffuse and emit light emitted from the light source unit 200. For example, beads (not shown) can be included in the resin layer 410, and the beads can diffuse and reflect incident light to increase the amount of light. The beads may be disposed in a range of 0.01 to 0.3% by weight of the resin layer 410. The beads may be made of any one selected from the group consisting of silicone, silica, glass bubbles, PMMA (Polymethyl methacrylate), urethane, Zn, Zr, Al2O3, and acrylic, and the particle size of the beads may be in the range of about 1 μm to about 20 μm, but is not limited thereto.

[0042] The resin layer 410 may have lengths W1 and W2 in the first and second directions (x-axis and y-axis directions). For example, the length W1 of the resin layer 410 in the first direction may be greater than or equal to the length W2 of the resin layer 410 in the second direction. For example, when the first and second light sources 210 and 220 are arranged in a row in the first direction, the length W1 of the resin layer 410 in the first direction may be greater than the length W2 of the resin layer 410 in the second direction. The resin layer 410 may have a predetermined thickness (in the third direction or z-axis direction). The resin layer 410 may have a thickness of about 4 mm or less. When the thickness h2 of the resin layer 410 is less than about 0.5 mm, the light source may be exposed on the upper surface of the resin layer 410. Specifically, the thickness h2 of the resin layer 410 may be about 0.5 mm to about 4 mm. More specifically, the thickness h2 of the resin layer 410 may be about 1 mm to about 4 mm. More specifically, the thickness h2 of the resin layer 410 is provided to be about 1.4 mm to 4 mm, which makes it difficult to effectively guide the light emitted from the light source unit 200. Also, if the thickness h2 of the resin layer 410 exceeds about 4 mm, the overall light path increases. As a result, light loss may occur during the process of emitting light from the light source unit 200. Therefore, it is preferable that the thickness h2 of the resin layer 410 satisfies the above range.

[0043] The resin layer 410 is disposed to cover the light source unit 200. The resin layer 410 may seal the light source unit 200. The resin layer 410 may protect the light source unit 200 and prevent or minimize loss of light emitted from the light source unit 200. The resin layer 410 may be in contact with a surface of the light source unit 200 and may be in contact with a light emitting surface of the light source unit 200. The resin layer 410 may also be in contact with an upper surface of the substrate 100. That is, the resin layer 410 may support the substrate 100 and the light source unit 200, and may support the light source unit 200 so that it is positioned at a predetermined position.

[0044] The resin layer 410 may include a plurality of side surfaces. For example, the resin layer 410 may include a first side surface S1 and a second side surface S2. The first side surface S1 may be disposed adjacent to the first light source 210 from the second light source 220. The first side surface S1 may face a light emitting surface of the first light source 210. The second side surface S2 is a side facing the first side surface S1. For example, the second side surface S2 may face the first side surface S1 in a second direction (y-axis direction). The second side surface S2 may be disposed adjacent to the second light source 220 from the first light source 210. The second side surface S2 may face a light emitting surface of the second light source 220. The first side surface S1 and the second side surface S2 may be flat or curved. The first side surface S1 and the second side surface S2 may be spaced apart at a predetermined interval. For example, the interval between the first side surface S1 and the second side surface S2 in the second direction (y-axis direction) may be constant. That is, the first side surface S1 and the second side surface S2 may be parallel to each other. The distance between the first side surface S1 and the second side surface S2 in the second direction may vary. For example, the distance between the first side surface S1 and the second side surface S2 in the second direction may gradually increase or decrease, or may increase and decrease in a wave pattern, as the distance increases in the first direction. The resin layer 410 may include a third side surface S3 and a fourth side surface S4. The third side surface S3 may be disposed between the first side surface S1 and the second side surface S2 to connect the two sides S1 and S2. For example, one end of the third side surface S3 may be connected to one end of the first side surface S1, and the other end of the third side surface S3 may be connected to one end of the second side surface S2. The fourth side surface S4 may be disposed opposite the third side surface S3 in the first direction (x-axis direction). The fourth side surface S4 may be disposed between the first side surface S1 and the second side surface S2 to connect the two sides S1 and S2. For example, one end of the fourth side surface S4 is connected to the other end of the first side surface S1, and the other end of the fourth side surface S4 is connected to the other end of the second side surface S2. The third side surface S3 and the fourth side surface S4 may be flat or curved. Also, the third side surface S3 and the fourth side surface S4 may be spaced apart by a predetermined distance.For example, the distance in the first direction (x-axis direction) between the third side surface S3 and the fourth side surface S4 may be constant. That is, the third side surface S3 and the fourth side surface S4 may be parallel. Also, the distance in the first direction between the third side surface S3 and the fourth side surface S4 may vary. For example, the distance in the first direction between the third side surface S3 and the fourth side surface S4 may gradually increase or decrease in the second direction, or may increase and decrease in a wave pattern.

[0045] The resin layer 410 may include a plurality of regions in which the light source unit 200 is disposed. For example, the resin layer 410 may include a first region A1 in which the first light source 210 is disposed and a second region A2 in which the second light source 220 is disposed. The first region A1 and the second region A2 may be disposed opposite each other in a second direction (y-axis direction) and spaced apart from each other. The first region A1 and the second region A2 may have corresponding shapes and areas. The resin layer 410 may include a groove 450 formed between the first region A1 and the second region A2. The groove 450 is disposed between the first light source 210 and the second light source 220. That is, the first light source 210 is disposed between the first side surface S1 and the groove 450, and the second light source 220 is disposed between the second side surface S2 and the groove 450. The groove 450 may be filled with air and thus may be a vacuum.

[0046] The groove 450 is provided to penetrate the upper and lower surfaces of the resin layer 410. The substrate 100 also has a through-hole formed in a region corresponding to the groove 450. The through-hole of the substrate 100 may have a shape and size corresponding to the groove 450. The groove 450 may be extended in one direction. Specifically, the groove 450 extends in a direction corresponding to the direction in which the first light source 210 and the second light source 220 are arranged. For example, when the first light source 210 and the second light source 220 are arranged to extend in the first direction (x-axis direction), the groove 450 may be extended in the first direction (x-axis direction). In this case, the length W3 of the groove 450 in the first direction may be longer than the length W1 of the light source unit 200 in the first direction. The length W3 of the groove 450 in the first direction may be 50% or more of the length W1 of the resin layer 410 in the first direction. For example, the length W3 of the groove 450 in the first direction may be longer than the length d1 of the area in which the plurality of first light sources 210 are arranged. Here, the length d1 of the area in which the plurality of first light sources 210 are arranged in the first direction may be defined as the length d1 in the first direction from one end of the first light source 1-1 210a arranged first among the plurality of first light sources 210 to the other end of the last light source 1-n 210d arranged last, where n is 4 or greater.

[0047] The length W3 of the groove 450 in the first direction may be longer than the length d2 of the region in which the plurality of second light sources 220 are arranged. Here, the length d2 of the region in which the plurality of second light sources 220 are arranged in the first direction may be defined as the length d2 in the first direction from one end of the first 2-1 light source 220a of the plurality of second light sources 220 to the other end of the last 2-n light source 220d. Here, n is 4 or greater. The groove 450 may have a length W4 in the second direction (y-axis direction). The lengths d1 and d2 in the first direction are lengths of both ends of the first and second light sources 210 and 220. The length W4 of the groove 450 in the second direction may be approximately 1 mm or greater. Specifically, the length W4 of the groove 450 in the second direction may be 1.5 mm or greater. More specifically, the length W4 of the groove 450 in the second direction may be approximately 2 mm to approximately 5 mm. If the length W4 of the groove 450 in the second direction is less than about 1 mm, it is difficult to block the light emitted from the first light source 210 or the second light source 220 from being transmitted to the second region A2 or the first region A1. If the length W4 of the groove 450 in the second direction is more than about 5 mm, the area occupied by the groove 450 in the resin layer 410 increases excessively, thereby reducing the light guide distance of the light source unit 200.

[0048] The resin layer 410 may include a connecting portion 470. The connecting portion 470 is disposed between the first region A1 and the second region A2. The connecting portion 470 may connect the first region A1 and the second region A2, which are spaced apart from each other. The connecting portion 470 is a region between the first and second regions A1 and A2 of the resin layer 410 where the groove 450 is not formed. The connecting portion 470 may have lengths d3 and d4 in a first direction. For example, the length d3 in the first direction between one end of the groove 450 and the third side surface S3 and the length d4 in the first direction between the other end of the groove 450 and the fourth side surface S4 may each be approximately 2 mm or more. The lengths d3 and d4 in the first direction of the connecting portion 470 are determined in consideration of the reliability of the resin layer 410 and the substrate 100. The length in the second direction of the connecting portion 470 may be the same as the length W4 in the second direction of the groove 450.

[0049] The resin layer 410 may include grooves 450 disposed between the plurality of first light sources 210 and the plurality of second light sources 220. A length W3 of the groove 450 in a first direction may be greater than a length d2 connecting both ends of the first light source 210 and / or a length d2 connecting both ends of the second light source 220. A length W4 of the groove 450 in a second direction may be smaller than the length W3 in the first direction and may be smaller than the distance between the first and second light sources 210 and 220. Thus, the groove 450 may prevent or minimize the movement of light emitted from the first light source 210 toward the second region A2 and the movement of light emitted from the second light source 220 toward the first region A1. Therefore, the lighting device 1000 may provide light with uniform intensity and clearly present a predetermined three-dimensional image. Since the resin layer 410 has a connecting portion 470 having lengths d3, d4, and W4 in the first and second directions between the first region A1 and the second region A2, the resin layer 410 can prevent the optical reliability from being reduced by the groove 450.

[0050] As shown in FIGS. 3 and 4, the light-shielding layer 500 is disposed on the resin layer 410. The light-shielding layer 500 is disposed on the uppermost part of the resin layer 410. The light-shielding layer 500 is disposed closest to the optical layer 700 among the layers included in the lighting module. The light-shielding layer 500 may include a metal or non-metallic material. The light-shielding layer 500 may include an absorbing material or a reflective material. The light-shielding layer 500 may absorb or reflect visible light, infrared light, or some ultraviolet light. For example, the light-shielding layer 500 may absorb or reflect wavelengths in the range of 380 nm to 800 nm. For example, the light-shielding layer 500 may be a black ink or black printed layer. The light-shielding layer 500 may be an absorbing material including carbon or carbon nanotubes, a black resist material, or a black matrix material. As another example, the light-shielding layer 500 may be a reflective layer, for example, a layer including aluminum (Al) or silver (Ag), or a layer of an alloy including at least one of the above metals. The light-blocking layer 500 may be a single layer or a multi-layer. For example, if it is a multi-layer, it may include a first layer made of a black material and a second layer made of a reflective material, in which case the first layer is disposed on top of the second layer. The light-blocking layer 500 may be implemented using a masking film.

[0051] The thickness h3 of the light-shielding layer 500 may be about 0.1 mm to about 5 mm. If the thickness h3 of the light-shielding layer 500 is about 0.1 mm or less, the light-shielding layer 500 may not be able to effectively block light that has passed through the resin layer 410, resulting in high light transmittance. If the thickness h3 of the light-shielding layer 500 exceeds about 5 mm, the light-shielding properties may be improved, but the overall weight of the lighting module may increase. Furthermore, the overall thickness of the lighting module may increase, making it difficult to provide the lighting module in a flexible form, which may make it difficult to apply the lighting module to lamp housings, brackets, etc. having various curved shapes.

[0052] The light-shielding layer 500 may include an opening 510. The opening 510 may be a hole penetrating the upper and lower surfaces of the light-shielding layer 500. The opening 510 may include a plurality of openings (n, where n is a natural number greater than or equal to 3). The openings may have various shapes depending on the three-dimensional image to be realized. For example, the upper shapes of the openings may be polygonal, such as a square, rectangle, triangle, or pentagon, or may be circular, elliptical, or irregular. The openings may have the same or different shapes. Also, the openings may have partially the same or partially different shapes. The number of openings may be greater than or equal to the number of light sources included in the light source unit 200. For example, the total number of the openings may be greater than the total number of the first and second light sources 210 and 220.

[0053] Each of the plurality of openings may have a length W5 in a first direction (x-axis direction) and a length W6 in a second direction (y-axis direction). The length W5 of the opening in the first direction is a factor that can control the width (length in the first direction) of the formed three-dimensional image (linear light pattern). Furthermore, the length W6 of the opening in the second direction is a factor that can control the luminous intensity and length (length in the second direction) of the formed three-dimensional image (linear light pattern). For example, the lengths W5 and W6 of each of the plurality of openings in the first and second directions may be approximately 3 mm or more. More specifically, the lengths W5 and W6 of each of the plurality of openings in the first and second directions may be approximately 3 mm to approximately 10 mm. If the lengths W5 and W6 of the openings in the first and second directions are each less than approximately 3 mm, the size of the formed light pattern will be too small, making it difficult to visually recognize the three-dimensional image from the outside. Furthermore, if the lengths W5 and W6 of the openings in the first and second directions exceed approximately 10 mm, the size of the formed light pattern will be too large and the light pattern will not be perceived three-dimensionally from the outside. Therefore, it is preferable that the lengths W5 and W6 of the openings in the first and second directions satisfy the above-mentioned ranges. Furthermore, the lengths W5 and W6 of the openings in the first and second directions may be the same or different within the above-mentioned ranges.

[0054] 1, the plurality of openings of the opening portion 510 may include first openings 511 and second openings 512. A plurality of the first openings 511 are provided and are regularly arranged. Also, a plurality of the second openings 512 are provided and are regularly arranged.

[0055] For example, the first openings 511 are spaced apart from one another and disposed in a region corresponding to the first region A1 of the resin layer 410. The first openings 511 are disposed on an emission path of light emitted from the light source unit 200. For example, when viewed from above, the first openings 511 are disposed between the first light source 210 and the first side surface S1 of the resin layer 410. In this case, the first openings 511 do not overlap with the first light source 210 in the vertical direction (z-axis direction). This prevents hot spots from being formed on the first openings 511 due to the first light source 210. Alternatively, the first openings 511 may partially overlap with the light source unit 200 in the vertical direction. This allows the lighting device 1000 to intentionally form hot spots and provide a three-dimensional image with various luminance intensities. The first openings 511 may have a predetermined shape and size. For example, the first openings 511 may have the same shape and the same lengths W5 and W6 in the first and second directions. Also, the number of the first openings 511 may be greater than the number of the first light sources 210. The shape, size, number, etc. of the first openings 511 may be changed depending on the stereoscopic image to be realized.

[0056] The second openings 512 are spaced apart from one another and disposed in a region corresponding to the second region A2 of the resin layer 410. The second openings 512 are disposed on an emission path of light emitted from the light source unit 200. For example, the second openings 512 are disposed between the second light source 220 and the second side surface S2 of the resin layer 410. At this time, the second openings 512 do not overlap with the second light source 220 in the vertical direction (z-axis direction). This prevents hot spots from being formed on the second openings 512 due to the second light source 220. Alternatively, the second openings 512 may partially overlap with the light source unit 200 in the vertical direction. This allows the lighting device 1000 to intentionally form hot spots and provide a three-dimensional image with various luminance intensities.

[0057] The second openings 512 may be spaced apart from the first openings 511. For example, the second openings 512 may be spaced apart from the first openings 511 in the second direction (y-axis direction). The second openings 512 may have a predetermined shape and size. For example, the second openings 512 may have the same shape and the same lengths W5 and W6 in the first and second directions. The second openings 512 may have the same shape and the same lengths W5 and W6 in the first and second directions as the first openings 511. The number of the second openings 512 may be greater than the number of the second light sources 220. The number of the second openings 512 may be the same as or different from the number of the first light sources 210. The shape, size, and number of the second openings 512 may be variable depending on the stereoscopic image to be realized.

[0058] Light emitted from the light source unit 200, for example, light emitted from the plurality of first light sources 210, is transmitted to the optical layer 700 through the plurality of first openings 511, and light emitted from the plurality of second light sources 220 is transmitted to the optical layer 700 through the plurality of second openings 512. The light transmitted to the optical layer 700 then passes through the optical layer 700 and is emitted to the outside of the lighting device 1000, and is viewed as a linear three-dimensional image. The shape, size, position, etc. of the opening 510 will be described in more detail with reference to FIGS. 12 to 20 below.

[0059] The optical layer 700 is disposed on the lighting module. The optical layer 700 is disposed on the light-blocking layer 500. The optical layer 700 may reflect and / or refract light incident from the lighting module to form a three-dimensional image. The optical layer 700 may have the same plane area as the top surface of the lighting module or may have a plane area larger than the top surface of the lighting module. The optical layer 700 may have a distance h4 from the light-blocking layer 500 in the vertical direction (z-axis direction). The distance h4 between the optical layer 700 and the light-blocking layer 500 may be constant. Thus, a first air layer 800 is formed between the optical layer 700 and the light-blocking layer 500. The distance h4 is a distance that allows light emitted through the openings 510 of the light-blocking layer 500 to be diffused. The distance h4 is a distance that allows the size of the three-dimensional image formed by passing through the optical layer 700 to be adjusted. The distance h4 may be approximately 5 mm or more. Specifically, the distance h4 may be about 5 mm to about 50 mm. More specifically, the distance h4 may be about 5 mm to about 20 mm. If the distance h4 is less than about 5 mm, the size of the three-dimensional image formed through the optical layer 700 is small, making it difficult to achieve a three-dimensional effect due to the difference in luminance. Also, if the distance h4 exceeds about 50 mm, the size of the three-dimensional image formed through the optical layer 700 increases, reducing the three-dimensional effect. Therefore, it is preferable that the distance h4 between the optical layer 700 and the light-shielding layer 500 satisfy the above range.

[0060] The optical layer 700 may include a transmissive portion 710 and a plurality of optical patterns 720. The transmissive portion 710 may be a support member supporting the plurality of optical patterns 720. The transmissive portion 710 may be provided in the form of a plate or film and may emit light incident thereon in an outgoing direction. The transmissive portion 710 may include a light-transmitting material. For example, the transmissive portion 710 may be made of resin or glass, and the resin may include a thermoplastic polymer or a photo-curable polymer. The transmissive portion 710 may be made of polymethylmethacrylate (PMMA), polycarbonate, polystyrene, or polyethylene terephthalate. The transmissive portion 710 may be made of a UV-curable resin containing an oligomer, more specifically, a resin whose main material is urethane acrylate oligomer. That is, a resin that is a mixture of a synthetic oligomer, urethane acrylate oligomer, and a polymer type that is polyacrylic can be used.

[0061] The transmissive portion 710 may have a predetermined thickness h52. For example, the thickness h52 of the transmissive portion 710 may be about 0.1 mm or more. More specifically, the thickness h52 of the transmissive portion 710 may be about 0.1 mm to about 10 mm. Preferably, the thickness h52 of the transmissive portion 710 may be about 0.1 mm to about 0.25 mm, taking into consideration the implementation of a three-dimensional effect and the overall thickness of the lighting device 1000.

[0062] The optical patterns 720 are disposed on one surface of the transmissive portion 710. Specifically, the optical patterns 720 are disposed on at least one of a lower surface of the transmissive portion 710 facing the light-blocking layer 500 and an upper surface opposite the lower surface of the transmissive portion 710. The optical patterns 720 may have a lenticular lens shape or a semi-cylindrical microlens shape. The optical patterns 720 may be integrally formed with the transmissive portion 710. Alternatively, the optical patterns 720 may be attached to the upper or lower surface of the transmissive portion 710 using an adhesive or the like. The optical patterns 720 may include a light-transmitting material. For example, the optical patterns 720 may be formed of a thermoplastic polymer or a photo-curable polymer, or may be made of the same material as the transmissive portion 710. The optical patterns 720 may be formed on the upper or lower surface of the transmissive portion 710 using a photomask process. The optical pattern 720 may have no refractive index difference or a refractive index difference of 0.2 or less with respect to the transmissive unit 710, thereby minimizing light loss due to the refractive index difference. The optical pattern 720 may have a shape capable of refracting incident light. The optical pattern 720 may have a major axis in the direction of the light emitting surfaces 215 and 225 of the light source unit 200. Specifically, the optical pattern 720 may have a shape extending with its major axis in a direction perpendicular to the light emission direction of the light source unit 200. For example, the optical patterns 720 may be arranged in a second direction (y-axis direction) on the top surface of the transmissive unit 710 as shown in the drawing, and have their major axes in a first direction (x-axis direction). Specifically, the optical patterns 720 may be arranged in a second direction according to a three-dimensional image of the lighting device 1000, and have their major axes in the first direction.

[0063] The optical patterns 720 may have a stripe or bar shape, a sinusoidal shape, or a sawtooth shape having a major axis in the first direction. The optical patterns 720 are arranged as a combination of lens units or unit patterns disposed on one or the other surface of the transmission unit 710. The optical patterns 720 may have at least one of a hemispherical shape, a semi-elliptical shape, and a polygonal shape as a side cross section in the second direction. The optical patterns 720 are provided in a predetermined size. For example, the length W7 of the optical patterns 720 in the second direction (y-axis direction) may be about 5 μm or more. More specifically, the length W7 of the optical patterns 720 in the second direction may be about 5 μm to about 100 μm. More specifically, the length W7 of the optical patterns 720 in the second direction may be about 10 μm to about 80 μm. The length W7 of the optical patterns 720 in the second direction preferably satisfies the above-described range in consideration of the clarity of the stereoscopic image to be formed.

[0064] The height (z-axis direction) h51 of the optical pattern 720 may be smaller than the length W7 of the optical pattern 720 in the second direction (y-axis direction). The height h51 of the optical pattern 720 may be about 0.5 times or less the length W7 of the optical pattern 720 in the second direction. Specifically, the height h51 of the optical pattern 720 may be about 0.1 to 0.48 times the length W7 of the optical pattern 720 in the second direction. If the height h51 of the optical pattern 720 is larger than the above-mentioned range, the size of the optical pattern 720 increases, resulting in a weak three-dimensional effect. Furthermore, if the height h51 of the optical pattern 720 is smaller than the above-mentioned range, the clarity of the three-dimensional image decreases. The interval P1 between the optical patterns 720 may be about 1 μm to about 100 μm. Specifically, the interval P1 between the optical patterns 720 may be about 1 μm to about 10 μm. It is preferable that the interval P1 between the optical patterns 720 satisfies the above range in consideration of the clarity characteristics of the stereoscopic image.

[0065] As a result, the optical layer 700 can provide a three-dimensional image. Specifically, light emitted from the light source unit 200 may be emitted as a point light source having uniform intensity through the opening 510 and then incident on the optical layer 700. The light incident on the optical layer 700 may then be reflected and / or refracted by the optical pattern 720 and pass through the optical layer 700, thereby providing a linear light pattern. The light pattern passing through the optical layer 700 may form a three-dimensional image in a direction perpendicular to the major axis of the optical pattern 720. The linear shape of the light pattern may include a curve having a curvature, and may be equal to or smaller than the total number of the first and second openings 511 and 512 included in the opening 510. The width of the linear light pattern may vary depending on the width of the first and second openings 511 and 512. For example, the greater the width of the first and second openings 511 and 512, the greater the width of the light pattern may be, and the smaller the width of the first and second openings 511 and 512, the smaller the width of the light pattern may be.

[0066] The light emitted from the optical layer 700 may have the highest luminous intensity in a central region Img1 perpendicular to the opening 510. Furthermore, side regions Img2 and Img3 adjacent to the central region Img1 may have lower luminous intensity than the central region Img1. The lighting device 1000 can form a three-dimensional image due to this difference in luminous intensity. The optical layer 700 can control the position, size, and shape of the three-dimensional image formed by the distance h4 between the optical layer 700 and the light-blocking layer 500. For example, the three-dimensional image is formed in the region Img_a adjacent to the light-blocking layer 500 or the region Img_b far from the light-blocking layer 500 depending on the distance h4 between the optical layer 700 and the light-blocking layer 500. Therefore, the lighting device 1000 according to the embodiment can provide various three-dimensional images by controlling the distance h4 between the light-blocking layer 500 and the optical layer 700, the size and shape of the optical pattern 720, and the positions and shapes of the plurality of openings.

[0067] 6 and 7 are cross-sectional views of a lighting device according to an embodiment. In the description using Fig. 6 and Fig. 7, the description of the same or similar components as those in the lighting device described above will be omitted, and the same or similar components will be denoted by the same reference numerals.

[0068] 6, the lighting device 1000 may include a reflective layer 300. The reflective layer 300 is disposed between the substrate 100 and the resin layer 410. The reflective layer 300 may have an area smaller than the area of ​​the top surface of the substrate 100. The reflective layer 300 is disposed on most of the top surface of the substrate 100. For example, the reflective layer 300 may be disposed in an area corresponding to the opening 510 in the vertical direction, and also in an area not corresponding to the opening 510. The reflective layer 300 may be spaced apart from the edge of the substrate 100, and the resin layer 410 may be attached to the substrate 100 in the spaced apart area. This may prevent the edge portion of the reflective layer 300 from peeling off.

[0069] The reflective layer 300 may include an opening 301 in which the lower portion of the light source unit 200 is disposed. The upper surface of the substrate 100 is exposed through the opening 301 of the reflective layer 300, and a portion where the lower portion of the light source unit 200 is bonded is disposed. The size of the opening 301 may be the same as or larger than the first light source 210 and the second light source 220 included in the light source unit 200, but is not limited thereto. The reflective layer 300 may be thinner than the substrate 100. For example, the reflective layer 300 may be provided with a thickness of about 0.5 to about 1 times the thickness of the substrate 100 to reduce transmission loss of incident light. The reflective layer 300 may be formed with a thickness thinner than the light source unit 200. The reflective layer 300 may have a thickness of about 0.2 to about 0.4 mm. A lower portion of the light source unit 200 may be inserted into the reflective layer 300 and an upper portion of the light source unit 200 may protrude through the opening 301 of the reflective layer 300. The light emitting surfaces 215 and 225 of the first light source 210 and the second light source 220, respectively, are provided in a direction perpendicular to the upper surface of the reflective layer 300.

[0070] The reflective layer 300 may include a metallic material or a non-metallic material. The metallic material may include metals such as aluminum, silver, and gold. The non-metallic material may include a plastic material or a resin material. The plastic material may be any one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polychlorinated biphenyl, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polybutylene terephthalate, polyethylene naphthalate, polyamide, polyacetal, polyphenylene ether, polyamide-imide, polyether-imide, polyether-ether-ketone, polyimide, polytetrafluoroethylene, liquid crystal polymer, fluororesin, copolymers thereof, and mixtures thereof. The resin material may be silicone or epoxy with a reflective material, for example, a metal oxide such as TiO2, Al2O3, or SiO2 added thereto. The reflective layer 300 may be implemented as a single layer or multiple layers, and such a layer structure may improve light reflection efficiency. The first reflective layer 300 according to the embodiment reflects incident light, thereby increasing the amount of light so that the light is emitted with a uniform distribution. Here, the reflective layer 300 may be omitted if a highly reflective material is coated on the upper surface of the substrate 100. The reflective layer 300 may include a plurality of reflective materials (not shown). The reflective materials may be bubbles such as air or a medium having the same refractive index as air. The reflective layer 300 may reflect incident light or refract it in another direction using the plurality of reflective materials.

[0071] The reflective layer 300 may include a reflective pattern (not shown). The reflective pattern may have a plurality of dot shapes. The reflective patterns may be disposed on the upper surface of the reflective layer 300. For example, the reflective patterns may be disposed in a form protruding from the upper surface of the reflective layer 300. The reflective patterns may be spaced apart from the light emitting element 200 and disposed in the direction of light emitted from the light emitting element 200. The reflective patterns may be formed by printing on the reflective layer 300. The reflective patterns may include reflective ink. The reflective patterns may be printed using a material including any one of TiO2, CaCO3, BaSO4, Al2O3, silicon, and PS. The planar shape of each of the reflective patterns may be one selected from the group consisting of a circle, an ellipse, and a polygon. Furthermore, the side cross section of each of the reflective patterns may be hemispherical or polygonal. The material of the reflective patterns may be white. The density of the dot patterns of the plurality of reflection patterns may increase with increasing distance from the light emitting surface 215, 225 of the first light source 210 and the second light source 220. Specifically, the density of the reflection patterns per unit area may increase with increasing distance from the light emitting surface 215, 225 of the first light source 210 and the second light source 220. For example, the density of the reflection patterns per unit area may increase from the light emitting surface 215 of the first light source 210 toward the first side surface S1, and may increase from the light emitting surface 225 of the second light source 220 toward the second side surface S2. The size of the plurality of reflection patterns may vary with increasing distance from the light emitting surfaces 215, 225 of the first and second light sources 210, 220. Specifically, the horizontal width of the plurality of reflection patterns may increase with increasing distance from the light emitting surfaces 215, 225 of the light source unit 200. For example, the size of the reflective pattern may increase from the light emitting surface 215 of the first light source 210 toward the first side surface S1 and from the light emitting surface 225 of the second light source 220 toward the second side surface S2. The plurality of reflective patterns may also be disposed between the light source unit 200 and the groove 450 of the resin layer 410.In more detail, the reflective patterns are further disposed between the first light source 210 and the groove 450 and between the second light source 220 and the groove 450. As a result, the lighting device 1000 can re-reflect light provided between the light source unit 200 and the groove 450, thereby minimizing light loss. That is, the reflective patterns are disposed on the traveling path of light emitted from the light source unit 200 and / or the traveling path of light emitted from the light source unit 200 and reflected by other components, thereby improving light reflectivity, reducing light loss, and improving the brightness of the point light source emitted through the opening 510.

[0072] 7, the reflective layer 300 is disposed on a portion of the substrate 100. For example, the reflective layer 300 is disposed on an emission path of the light source unit 200. More specifically, the reflective layer 300 is disposed between the first side surface S1 and the light-emitting surface 215 of the first light source 210, and between the second side surface S2 and the light-emitting surface 225 of the second light source 220. Furthermore, the reflective layer 300 is disposed in an area corresponding to the opening 510 in the vertical direction. In this case, the reflective layer 300 is provided with a predetermined horizontal width. For example, the horizontal width of the reflective layer 300 may be about 1 to about 1.5 times the lengths W5 and W6 of the opening 510 in the first and second directions. Therefore, the reflective layer 300 is disposed on a path of light emitted from the light source unit 200 with a minimum area, thereby improving light reflectivity and preventing light loss. Therefore, the brightness of the point light source emitted through the opening 510 can be improved, and hot spots caused by the light source unit 200 on the opening 510 can be prevented.

[0073] 8 and 9 are other cross-sectional views of the lighting device according to the embodiment. In the description using Fig. 8 and Fig. 9, the description of the same or similar components as those of the lighting device described above will be omitted, and the same or similar components will be denoted by the same reference numerals.

[0074] Referring to FIG. 8 , the lighting device 1000 according to the embodiment may further include a transparent layer 550. The transparent layer 550 is disposed between the resin layer 410 and the light-shielding layer 500. The transparent layer 550 is disposed in contact with an upper surface of the resin layer 410. The transparent layer 550 is also disposed in contact with a lower surface of the light-shielding layer 500. The transparent layer 550 serves as a wavelength conversion layer and may include a wavelength conversion material. For example, the transparent layer 550 may include at least one wavelength conversion material selected from the group consisting of phosphor and quantum dots. For example, the transparent layer 550 may include a phosphor and emit light of white, blue, yellow, green, red, etc. The phosphor may include at least one or two of a green phosphor, a red phosphor, an amber phosphor, a yellow phosphor, a white phosphor, and a blue phosphor. The phosphor may include at least one of a YAG system, a TAG system, a silicate system, a sulfide system, and a nitride system.

[0075] The transparent layer 550 may absorb a portion of the first light emitted from the light source unit 200 and convert it into a second light having a wavelength band different from the first light. Specifically, the transparent layer 550 may absorb the first light emitted from the light source unit 200 and emitted through the upper surface of the resin layer 410 and convert it into the second light.

[0076] The transparent layer 550 may have a predetermined thickness. Specifically, the transparent layer 550 may have a thickness thinner than that of the resin layer 410. For example, the transparent layer 550 may have a thickness of about 50 μm to about 500 μm. Specifically, the transparent layer 550 may have a thickness of about 80 μm to about 400 μm. More specifically, the transparent layer 550 may have a thickness of about 100 μm to about 300 μm. If the transparent layer 550 has a thickness of less than about 50 μm, it may be difficult to convert the first light emitted from the light source unit 200 into the second light. Furthermore, if the transparent layer 550 has a thickness of less than about 50 μm, the color of the transparent layer 550 may not be clearly visible when the lighting device 1000 is turned off, and the internal configuration of the lighting device 1000 may be visible from the outside. Furthermore, if the thickness of the light-transmitting layer 550 exceeds approximately 500 μm, the first light emitted from the light source unit 200 can be effectively converted into the second light, but the thickness of the light-transmitting layer 550 becomes relatively thick. As a result, the overall thickness of the lighting device 1000 increases, reducing flexibility. Furthermore, the light emitted from the light source unit 200 is lost while passing through the light-transmitting layer 550, reducing overall brightness. As a result, the luminance and clarity of the three-dimensional image formed through the optical layer 700 decrease. Alternatively, the light-transmitting layer 550 can function as a blind sheet. Specifically, the light-transmitting layer 550 can prevent the light emitted from the light source unit 200 from concentrating, for example, preventing hot spots.

[0077] In this case, the transparent layer 550 may include a transparent material. For example, the transparent layer 550 may include at least one of PET (Polyethylene terephthalate), PS (Polystyrene), PI (Polyimide), PEN (Polyethylene naphthalate), and PC (Polycarbonate). The transparent layer 550 may include a light-transmitting layer in a region other than where a transmission control pattern (not shown), which will be described later, is formed.

[0078] The transparent layer 550 may have a predetermined thickness. For example, the thickness of the transparent layer 550 may be about 50 μm to about 300 μm. Specifically, the thickness of the transparent layer 550 may be about 80 μm to about 250 μm. More specifically, the thickness of the transparent layer 550 may be about 100 μm to about 200 μm. If the thickness of the transparent layer 550 is less than about 50 μm, the transparent layer 550 may not be able to effectively block light incident from below. That is, the transparent layer 550 may not have a sufficient thickness to prevent hot spots, resulting in the formation of hot spots. Also, if the thickness of the transparent layer 550 exceeds about 300 μm, the formation of hot spots due to light emitted from the light source unit 200 may be effectively prevented, but the light emitted from the light source unit 200 may be lost as it passes through the transparent layer 550, resulting in a reduction in overall brightness. Therefore, it is preferable that the thickness of the transparent layer 550 satisfies the above range.

[0079] The transparent layer 550 may include a plurality of transmission control patterns (not shown) spaced apart from each other in the first and second directions. The transmission control patterns are formed on at least one of the upper and lower surfaces of the transparent layer 550. The transmission control patterns may block all or part of the light emitted through the resin layer 410. The transmission control patterns may include ink. For example, the transmission control patterns may be printed using a material including any one of TiO2, CaCO3, BaSO4, Al2O3, silicon, and PS. The transmission control patterns may be white, which has excellent reflective properties. The transmission control patterns may also be provided as recessed grooves on the upper or lower surface of the optical layer 700. For example, when the transmission control patterns are formed on the upper surface of the light-blocking layer 500, the transmission control patterns may be provided as grooves recessed from the upper surface to the lower surface of the optical layer 700. The transmission control patterns are arranged in regions corresponding to the openings 510. The plurality of transmission control patterns are formed to a predetermined thickness, and can control the transmittance of light by blocking or partially transmitting light incident on the transmission control patterns.

[0080] The lighting device 1000 according to the embodiment may include a light-transmitting layer 550 that performs at least one of wavelength conversion and blind functions. Thus, the lighting device 1000 can change the light emitted from the light source unit 200 to a set color and improve the luminance uniformity of the light emitted through the opening 510.

[0081] 9, the transparent layer 550 is disposed between the resin layer 410 and the light-shielding layer 500. In this case, the transparent layer 550 may be in direct contact with the light-shielding layer 500. In addition, the transparent layer 550 may be spaced apart from the resin layer 410 in the vertical direction (z-axis direction). Accordingly, a second air layer 820 is formed between the resin layer 410 and the transparent layer 550. In the lighting device 1000 according to the embodiment, the second air layer 820 is disposed between the resin layer 410 and the transparent layer 550, thereby more effectively controlling hot spots of light. In addition, the second air layer 820 can control the refraction angle and movement path of light, thereby more effectively forming a three-dimensional image.

[0082] 10 is another cross-sectional view of the lighting device according to the embodiment. In the description using FIG. 10, the description of the same or similar components as those in the lighting device described above will be omitted, and the same or similar components will be denoted by the same reference numerals.

[0083] 10, the optical layer 700 is disposed on the lighting module. The optical layer 700 is disposed on the light-blocking layer 500. The optical layer 700 may reflect and / or refract light incident from the lighting module to form a three-dimensional image. The optical layer 700 may be spaced apart from the light-blocking layer 500 by a predetermined distance h4 in the vertical direction (z-axis direction). The distance h4 is a distance at which light emitted through the openings 510 of the light-blocking layer 500 can be diffused. The distance h4 is also a distance at which the size of the three-dimensional image formed by passing through the optical layer 700 can be adjusted.

[0084] In the lighting device 1000 according to the embodiment, the distance h4 between the optical layer 700 and the light-blocking layer 500 may vary. For example, the optical layer 700 is disposed in a tilted form at a predetermined tilt angle (θ) with respect to the upper surface of the resin layer 410. In this case, the tilt angle (θ) may be an acute angle less than 90 degrees. As a result, the distance h4 between the optical layer 700 and the light-blocking layer 500 gradually increases or decreases in the horizontal direction, and the vertical height of the first air layer 800 disposed between the optical layer 700 and the light-blocking layer 500 may vary depending on the tilt angle of the optical layer 700. Therefore, the lighting device 1000 according to the embodiment may realize various three-dimensional effects by varying the distance h4.

[0085] 11 is another cross-sectional view of the lighting device according to the embodiment. In the description using FIG. 11, the description of the same or similar components as those in the lighting device described above will be omitted, and the same or similar components will be denoted by the same reference numerals.

[0086] 11, the light source unit 200 according to the embodiment is disposed on the substrate 100. The light source unit 200 is disposed on an upper surface of the substrate 100 facing the light-shielding layer 500. The light source unit 200 may include a package in which a light-emitting chip is packaged as an element having an LED. The light-emitting chip may emit at least one of visible light (e.g., blue, red, green, yellow), ultraviolet light (UV), and infrared light, and the light source unit 200 may emit at least one of visible light (e.g., white, blue, red, yellow, green), ultraviolet light, and infrared light. The light source unit 200 may be a top-view type in which light-emitting surfaces 215 and 225 face upward. That is, the optical axis (OA) of the light source unit 200 may be perpendicular to the upper surface of the substrate 100.

[0087] The light source unit 200 is a five-sided LED chip that is disposed on the substrate 100 in a flip chip configuration. The light source unit 200 may emit at least one of visible light (e.g., blue, red, green, yellow), ultraviolet light (UV), and infrared light. The light source unit 200 includes a plurality of light-emitting surfaces, and the strongest light is emitted toward top surfaces 215 and 225 facing the light-shielding layer 500. The light source unit 200 may be a horizontal chip or a vertical chip. In the horizontal chip, two different electrodes are arranged horizontally, while in the vertical chip, two different electrodes are arranged vertically. When the light source unit 200 is a horizontal chip or a vertical chip, it is connected to other chips or wiring patterns via wires. Therefore, the thickness of the module increases depending on the height of the wires, and pad space for wire bonding is required.

[0088] The light source unit 200 may include a plurality of light sources. For example, the light source unit 200 may include a plurality of first light sources 210 disposed in a first region A1 of the resin layer 410 and a plurality of second light sources 220 disposed in a second region A2 of the resin layer 410. The plurality of first light sources 210 are spaced apart in a first and / or second direction in the first region A1, and the plurality of second light sources 220 are spaced apart in the first and / or second direction in the second region A2.

[0089] The light source unit 200 may emit light toward an upper surface of the resin layer 410. For example, the first light sources 210 may emit light toward an upper surface of the first region A1 of the resin layer 410, and the second light sources 220 may emit light toward an upper surface of the second region A2 of the resin layer 410. Then, light emitted from the first light sources 210 is guided by the resin layer 410 and emitted through the first opening 511, and light emitted from the second light source 220 is guided by the resin layer 410 and emitted through the second opening 512. Although not shown in the drawings, a reflective layer 300 (see FIG. 6) may be further disposed between the substrate 100 and the resin layer 410. The reflective layer 300 is disposed on most of the upper surface of the substrate 100. The reflective layer 300 may include openings in which the lower portions of the light source units 200 are disposed. The opening of the reflective layer exposes the upper surface of the substrate 100 and is provided with a portion to which the lower portion of the light source unit 200 is bonded. The size of the opening in the reflective layer 300 is set to be equal to or larger than the size of the first light source 210 and the second light source 220 included in the light source unit 200, but is not limited thereto.

[0090] As a result, light emitted from the light source unit 200 is emitted in the form of a point light source having uniform intensity through the opening 510. In addition, the light is incident on the optical layer 700 to form a linear light pattern, for example, a three-dimensional image.

[0091] 12 to 16 are diagrams illustrating various openings in the light-shielding layer of the lighting device according to the embodiment.

[0092] 12, the light-shielding layer 500 according to the embodiment may include openings 510 penetrating the upper and lower surfaces of the light-shielding layer 500. The openings 510 may include a plurality of openings (n, where n is a natural number greater than or equal to 3). The openings 510 may include a first opening 511 and a second opening 512. The first openings 511 are disposed in a region corresponding to the first region A1 of the resin layer 410. A plurality of the first openings 511 are provided in the first region A1. The first openings 511 are regularly arranged. For example, the first openings 511 are spaced apart from one another in a first direction (x-axis direction). The first openings 511 may be spaced apart at equal intervals. The first openings 511 may have the same shape and the same lengths in the first and second directions (x-axis and y-axis directions). That is, the first openings 511 may have a regularity of having the same shape and the same length in the first and second directions.

[0093] The plurality of first openings 511 are arranged in a region between the first side surface S1 and the first light source 210. The plurality of first openings 511 are arranged in a region corresponding to the first side surface S1. The plurality of first openings 511 are arranged in a region that does not overlap with the first light source 210 in the vertical direction. The number of the plurality of first openings 511 may be greater than the number of the plurality of first light sources 210.

[0094] The second openings 512 are disposed in a region corresponding to the second region A2 of the resin layer 410. A plurality of the second openings 512 are provided in the second region A2. The second openings 512 are arranged with regularity. For example, the second openings 512 are spaced apart from one another in a first direction (x-axis direction). The second openings 512 may be spaced apart at equal intervals. The second openings 512 may have the same shape and the same lengths in the first and second directions (x-axis and y-axis directions). That is, the second openings 512 may have the same shape and the same lengths in the first and second directions. The second openings 512 may have the same shape as the first opening 511. The second openings 512 may have the same lengths in the first and second directions (x-axis and y-axis directions) as the first openings 511. That is, the second opening 512 is provided to have the same shape and size as the first opening 511 .

[0095] The plurality of second openings 512 are arranged in a region between the second side surface S2 and the second light source 220. The plurality of second openings 512 are arranged in a region corresponding to the second side surface S2. The plurality of second openings 512 are arranged in a region that does not overlap with the second light source 220 in the vertical direction. The number of the plurality of second openings 512 may be greater than the number of the plurality of second light sources 220.

[0096] The second openings 512 are arranged in regions corresponding to the first openings 511. For example, the second openings 512 are arranged in regions corresponding to the first openings 511 in the second direction (y-axis direction). That is, the first openings 511 and the second openings 512 arranged in corresponding regions are arranged opposite each other in the second direction. The number of the second openings 512 may be the same as the number of the first openings 511. However, the embodiment is not limited thereto, and the number of the second openings 512 may be more or less than the number of the first openings 511 depending on the shape of a three-dimensional image to be realized.

[0097] As a result, the pattern of light emitted through the first opening 511 and the second opening 512 and passing through the optical layer 700 can form a three-dimensional image. More specifically, the light is provided in a linear pattern corresponding to the shape, size, and position of the first opening 511 and the second opening 512. The linear pattern may include a curve. Here, since the first opening 511 and the second opening 512 have the same shape and size (lengths in the first and second directions), the linear shapes of the light patterns formed through the first opening 511 and the second opening 512 can have the same length or width in the first direction.

[0098] The first opening 511 and the second opening 512 are disposed opposite to each other in the second direction, so that linear light patterns formed through the first opening 511 and the second opening 512, respectively, can provide a three-dimensional image that meets at the center region of the light-blocking layer 500.

[0099] 13, the first openings 511 are arranged in a region corresponding to the first region A1 of the resin layer 410, and the second openings 512 are arranged in a region corresponding to the second region A2 of the resin layer 410. At this time, the first openings 511 and the second openings 512 are arranged with a regularity. For example, the first openings 511 may have the same shape and lengths in the first and second directions. Also, the second openings 512 may have the same shape and lengths in the first and second directions. The second openings 512 may have the same shape and size as the first openings 511.

[0100] The second openings 512 are arranged in regions corresponding to the regions between the first openings 511. Specifically, the second openings 512 are arranged in regions corresponding to the regions between the first openings 511 spaced apart in the first direction (x-axis direction) and the regions corresponding to the regions in the second direction (y-axis direction). That is, the first openings 511 and the second openings 512 are arranged in a zigzag pattern without facing each other in the second direction. In this case, the number of the second openings 512 may be less than the number of the first openings 511. However, the embodiment is not limited thereto, and the number of the second openings 512 may be the same as the number of the first openings 511 depending on the shape of a three-dimensional image to be realized.

[0101] As a result, the light pattern emitted through the first opening 511 and the second opening 512 and passing through the optical layer 700 can form a three-dimensional image. More specifically, the light is provided in a linear pattern corresponding to the shape, size, and position of the first opening 511 and the second opening 512. The linear pattern can include a curve. In this case, the first opening 511 and the second opening 512 can have the same shape and size (lengths in the first and second directions). Therefore, the linear shapes of the light patterns formed through the first opening 511 and the second opening 512 can have the same length or width in the first direction. The first opening 511 and the second opening 512 are arranged in a zigzag pattern and do not face each other in the second direction. As a result, the light patterns formed through the first opening 511 and the second opening 512 can provide a three-dimensional image in a zigzag crossing pattern.

[0102] 14, the first openings 511 are arranged in a region corresponding to the first region A1 of the resin layer 410, and the second openings 512 are arranged in a region corresponding to the second region A2 of the resin layer 410. At this time, the first openings 511 and the second openings 512 are arranged with a regularity. For example, the first openings 511 may have a regularity such that they have the same shape and lengths in the first and second directions. Furthermore, the second openings 512 may have a regularity such that they have the same shape and lengths in the first and second directions.

[0103] The second openings 512 are arranged in regions corresponding to the first openings 511. For example, the second openings 512 are arranged in regions corresponding to the first openings 511 in the second direction (y-axis direction). That is, the first openings 511 and the second openings 512 arranged in corresponding regions are arranged opposite each other in the second direction. The number of the second openings 512 may be the same as the number of the first openings 511. However, the embodiment is not limited thereto, and the number of the second openings 512 may be more or less than the number of the first openings 511 depending on the shape of a three-dimensional image to be realized.

[0104] The second opening 512 may have a different shape from the first opening 511. For example, as shown in Fig. 14, the first opening 511 may have a rectangular shape, and the second opening 512 may have a circular shape. Also, the second opening 512 may have a smaller size than the first opening 511. For example, the second opening 512 may have lengths W5 and W6 in the first and second directions (x-axis and y-axis directions) that are smaller than those of the first opening 511.

[0105] As a result, the pattern of light emitted through the first opening 511 and the second opening 512 and passing through the optical layer 700 can form a three-dimensional image. More specifically, the light is provided in a linear pattern corresponding to the shape, size, and position of the first opening 511 and the second opening 512. The linear pattern may include a curve. Here, since the first opening 511 and the second opening 512 have different shapes and sizes (lengths in the first and second directions), the linear shapes of the light patterns formed through the first opening 511 and the second opening 512 can have different lengths or widths in the first direction.

[0106] The first opening 511 and the second opening 512 are disposed opposite to each other in the second direction, so that linear light patterns formed through the first opening 511 and the second opening 512, respectively, can provide a three-dimensional image that meets at the center region of the light-blocking layer 500.

[0107] 15, the first openings 511 are arranged in a region corresponding to the first region A1 of the resin layer 410, and the second openings 512 are arranged in a region corresponding to the second region A2 of the resin layer 410. At this time, the first openings 511 and the second openings 512 are arranged with a regularity. For example, the first openings 511 may have a regularity such that they have the same shape and the same lengths in the first and second directions. Furthermore, the second openings 512 may have a regularity such that they have the same shape and the same lengths in the first and second directions.

[0108] The second openings 512 are arranged in areas corresponding to the areas between the first openings 511. Specifically, the second openings 512 are arranged in areas corresponding to the areas between the first openings 511 spaced apart in the first direction (x-axis direction) and the areas corresponding to the areas in the second direction (y-axis direction). That is, the first openings 511 and the second openings 512 are arranged in a zigzag pattern without facing each other in the second direction. In this case, the number of the second openings 512 may be less than the number of the first openings 511. However, the embodiment is not limited thereto, and the number of the second openings 512 may be the same as the number of the first openings 511 depending on the shape of the three-dimensional image to be realized. The second openings 512 may have a different shape from the first openings 511. For example, as shown in FIG. 15, the first openings 511 may have a rectangular shape, and the second openings 512 may have a circular shape. Furthermore, the second opening 512 may have a smaller size than the first opening 511. For example, the second opening 512 may have lengths W5 and W6 in the first and second directions (x-axis and y-axis directions) smaller than those of the first opening 511.

[0109] As a result, the pattern of light emitted through the first opening 511 and the second opening 512 and passing through the optical layer 700 can form a three-dimensional image. More specifically, the light is provided in a linear pattern corresponding to the shape, size, and position of the first opening 511 and the second opening 512. The linear pattern may include a curve. Here, since the first opening 511 and the second opening 512 have different shapes and sizes (lengths in the first and second directions), the linear shapes of the light patterns formed through the first opening 511 and the second opening 512 can have different lengths or widths in the first direction.

[0110] The first opening 511 and the second opening 512 are arranged in a zigzag pattern and do not face each other in the second direction, so that the light patterns formed through the first opening 511 and the second opening 512 can provide a three-dimensional image in a zigzag pattern.

[0111] 16, the first openings 511 are disposed in a region corresponding to the first region A1 of the resin layer 410, and the second openings 512 are disposed in a region corresponding to the second region A2 of the resin layer 410. The first openings 511 and the second openings 512 are arranged with a regularity. Specifically, the first openings 511 may have the same shape. The first openings 511 may have a regularity in which the lengths W5 of the first openings 511 in the first direction vary. For example, the lengths W5 of the first openings 511 in the first direction may gradually increase from the first light source (leftmost in the drawing) arranged first among the first light sources 210 to the last light source (rightmost in the drawing).

[0112] The second openings 512 may have the same shape. The second openings 512 may have a regularity in which the length W6 in the second direction varies. For example, the length W6 in the second direction of the second openings 512 may gradually increase from the first second light source (leftmost in the drawing) to the last second light source (rightmost in the drawing) among the second light sources 220.

[0113] The length of at least one of the plurality of first openings 511 in the first direction (x-axis direction) may be greater than the length of at least one of the plurality of second openings 512 in the first direction. The length of at least one of the plurality of second openings 512 in the second direction (y-axis direction) may be greater than the length of at least one of the plurality of first openings 511 in the second direction. The plurality of second openings 512 are arranged in regions corresponding to the plurality of first openings 511. For example, the plurality of second openings 512 are arranged in regions corresponding to the plurality of first openings 511 in the second direction (y-axis direction). That is, the first openings 511 and the second openings 512 arranged in corresponding regions are arranged opposite each other in the second direction. Although not shown in the drawings, the plurality of second openings 512 are arranged in regions between the plurality of first openings 511 spaced apart in the first direction and in regions corresponding to the second direction. That is, the plurality of first openings 511 and the plurality of second openings 512 are arranged in a zigzag pattern.

[0114] The number of the second openings 512 may be the same as the number of the first openings 511. However, the embodiment is not limited thereto, and the number of the second openings 512 may be more or less than the number of the first openings 511 depending on the shape of a three-dimensional image to be realized.

[0115] As a result, the pattern of light emitted through the first opening 511 and the second opening 512 and passing through the optical layer 700 may form a three-dimensional image. More specifically, the light is provided in a linear pattern corresponding to the shape, size, and position of the first opening 511 and the second opening 512. The linear pattern may include a curve. In this case, the first openings 511 may have different lengths W5 in the first direction, and the second openings 512 may have different lengths W6 in the second direction. Therefore, the linear shapes of the light patterns formed through the first opening 511 and the second opening 512 may have different luminous intensities, lengths or widths in the first direction, etc.

[0116] The lighting device 1000 according to the embodiment may form a linear three-dimensional image using point light sources of uniform intensity emitted through each of the first and second openings 511 and 512. The linear light pattern may include a curve and have a shape corresponding to the shape, size, and position of the first opening 511 and the second opening 512. The number of linear shapes may be equal to or smaller than the total number of the first openings 511 and the second openings 512. More specifically, the light emitted from each of the first opening 511 and the second opening 512 may pass through the optical layer 700 and form a linear shape. The linear light patterns formed according to the shape, size, and position of the first opening 511 and the second opening 512 may overlap each other in one region. As a result, when a human visually perceives the linear light pattern from outside the lighting device 1000, the number of linear shapes appears to be less than the number of the openings.

[0117] The resin layer 410 according to the embodiment may include a groove 450 formed between the first region A1 and the second region A2. Therefore, when the first and second light sources 210 and 220 emit light simultaneously, the light emitted from the first and second light sources 210 and 220 can be prevented or minimized from moving to the second and first regions A2 and A1, respectively. Furthermore, when one light source selected from the first and second light sources 210 and 220 emits light, the light can be prevented or minimized from moving to a region of the resin layer 410 that does not correspond to the emitting light source. Therefore, the lighting device 1000 according to the embodiment can prevent the light emitted from the first and second light sources 210 and 220 from mixing, thereby providing a clearly defined three-dimensional image, for example, a three-dimensional image having a curved shape.

[0118] 17a and 17b to 20a and 20b are diagrams illustrating three-dimensional images formed according to various opening shapes in the lighting device according to the embodiment.

[0119] 17a and 17b, the light-shielding layer 500 may include an opening 510 including a plurality of openings. The plurality of openings may include a plurality of first openings 511 arranged in a region corresponding to the first region A1 of the resin layer 410 and a plurality of second openings 512 arranged in a region corresponding to the second region A2 of the resin layer 410. The plurality of first openings 511 may include 1-1 to 1-6 openings 511a to 511f spaced apart in a first direction. The 1-1 to 1-6 openings 511a to 511f may have a regular arrangement having the same shape and lengths in the first and second directions. The plurality of second openings 512 may include 2-1 to 2-5 openings 512a to 512e spaced apart in the first direction. The 2-1 to 2-5 openings 512a to 512e may have a regular arrangement having the same shape and lengths in the first and second directions.

[0120] The second openings 512 are arranged in areas corresponding to the spaces between the first openings 511. Specifically, the second openings 512 are arranged in areas corresponding to the spaces between the first openings 511 spaced apart in the first direction (x-axis direction) and the spaces in the second direction (y-axis direction). That is, the first openings 511 and the second openings 512 are arranged in a zigzag pattern without facing each other in the second direction. As a result, the light pattern emitted through the first openings 511 and the second openings 512 and passing through the optical layer 700 may have a shape in which linear three-dimensional images intersect in a zigzag pattern. In this case, the linear shape of the light pattern may include a curve. Specifically, the light emitted through the first opening 511 may have a linear shape extending from a first side surface S1 adjacent to the first opening 511 toward the second side surface S2. In this case, the width of the light pattern in the first direction in the area adjacent to the first side surface S1 may be greater than the width of the area adjacent to the second side surface S2. That is, the luminous intensity of the light pattern decreases as it moves away from the first opening 511. Therefore, when the light pattern is viewed from the outside, the width of the light pattern in the first direction appears to gradually decrease from the first side surface S1 to the second side surface S2.

[0121] The light emitted through the second opening 512 may have a linear shape extending from the second side S2 adjacent to the second opening 512 toward the first side S1. In this case, the width of the light pattern in the first direction in the region adjacent to the second side S2 may be greater than the width of the region adjacent to the first side S1. That is, the luminous intensity of the light pattern decreases as it moves away from the second opening 512. Therefore, when the light pattern is viewed from the outside, the width in the first direction appears to gradually decrease from the second side S2 toward the first side S1.

[0122] 18a and 18b, the light-shielding layer 500 may include an opening 510 including a plurality of openings. The plurality of openings may include a plurality of first openings 511 arranged in a region corresponding to the first region A1 of the resin layer 410, and a plurality of second openings 512 arranged in a region corresponding to the first or second region A1 or A2 of the resin layer 410. The plurality of first openings 511 may include 1-1 to 1-6 openings 511a to 511f spaced apart in a first direction. The 1-1 to 1-6 openings 511a to 511f may have a regularity of having the same shape and the same length in the first and second directions. The plurality of second openings 512 may include 2-1 to 2-5 openings 512a to 512e spaced apart in a direction (diagonal direction) between the first and second directions. As a result, some of the plurality of second openings 512 are arranged in an area corresponding to the first area A1, and the rest are arranged in an area corresponding to the second area A2. The 2-1 to 2-5 openings 512a to 512e may have a regularity of having the same shape and the same length in the first and second directions.

[0123] The second openings 512 are arranged in areas corresponding to the areas between the first openings 511. Specifically, the second openings 512 are arranged in areas corresponding to the areas between the first openings 511 spaced apart in the first direction (x-axis direction) and the areas corresponding to the areas in the second direction (y-axis direction). That is, the first openings 511 and the second openings 512 are arranged in a zigzag pattern without facing each other in the second direction. The interval between the second openings 512 and the first side surface S1 may vary. Specifically, a virtual line L1 may be included that connects the centers of the first openings 511. The virtual line L1 extends in the first direction. In this case, the interval between each of the second openings 512 and the virtual line L1, for example, the length in the second direction, may vary. For example, the length in the second direction between the virtual straight line L1 and the second opening 512 may become smaller from the first arranged 2-1 opening 512a to the last arranged 2-5 opening 512e among the plurality of second openings 512.

[0124] As a result, the light pattern emitted through each of the first opening 511 and the second opening 512 and passing through the optical layer 700 may have a shape in which linear three-dimensional images intersect in a zigzag pattern. In this case, the linear shape of the light pattern may include a curve. Specifically, the light emitted through the first opening 511 may have a linear shape extending from a first side surface S1 adjacent to the first opening 511 toward the second side surface S2. In addition, since the second opening 512 is formed such that the distance between it and the virtual straight line L1 varies, the light emitted through the second opening 512 may have a linear shape with a different curvature and curved shape. In this case, since the size of the second opening 512 is smaller than the first opening 511, the light pattern formed by passing through the second opening 512 may have a smaller width (length in the first direction) than the light pattern formed by passing through the first opening 511.

[0125] 19a and 19b, the light-shielding layer 500 may include an opening 510 including a plurality of openings. The plurality of openings may include a plurality of first openings 511 arranged in a region corresponding to the first region A1 of the resin layer 410 and a plurality of second openings 512 arranged in a region corresponding to the second region A2 of the resin layer 410. The plurality of first openings 511 are arranged with regularity in the first region A1, and the plurality of second openings 512 are arranged with regularity in the second region A2. The plurality of openings may further include a plurality of third openings 513 arranged in regions between the first openings 511 and the second openings 512. The third openings 513 are arranged in a central region (based on the second direction) of the light-shielding layer 500. A portion of the third openings 513 is arranged in a region corresponding to at least one of the first region A1 and the second region A2. The third openings 513 are arranged in a region that overlaps the grooves 450 of the resin layer 410 in the vertical direction (z-axis direction). The plurality of first openings 511 and the plurality of second openings 512 are arranged in a region corresponding to the second direction (y-axis direction). That is, the first openings 511 and the second openings 512 are arranged opposite each other in the second direction. The plurality of third openings 513 are arranged in regions that respectively correspond to the regions between the plurality of first openings 511 that are spaced apart and the regions between the plurality of second openings 512 that are spaced apart. Specifically, the plurality of third openings 513 are arranged in a region that corresponds in the second direction (y-axis direction) to the regions between the plurality of first openings 511 that are spaced apart in the first direction (x-axis direction) and the regions between the plurality of second openings 512. That is, the first opening 511 and the third opening 513, and the second opening 512 and the third opening 513 are arranged in a zigzag pattern in the second direction without facing each other.

[0126] As a result, the light pattern emitted through each of the first opening 511 and the second opening 512 and passing through the optical layer 700 may form a linear three-dimensional image including a curve. In this case, the first opening 511 and the second opening 512 are disposed opposite to each other in the second direction. Therefore, the linear light patterns formed through each of the first opening 511 and the second opening 512 may provide a three-dimensional image that meets in the central region of the light-shielding layer 500. More specifically, the three-dimensional image may have a concave shape toward the central region of the light-shielding layer 500. In addition, the three-dimensional image may have a shape in which the luminous intensity decreases toward the central region of the light-shielding layer 500.

[0127] A portion of the light emitted from the light source unit 200 is transmitted to the optical layer 700 through the third opening 513. The light then passes through the optical layer 700 to form a linear three-dimensional image including a curve. In this case, the linear light pattern formed through the third opening 513 may have a shape extending from the central region of the light-shielding layer 500 toward the first and second side surfaces S1 and S2 of the resin layer 410. In addition, the light pattern may have a shape symmetrical with respect to the central region of the light-shielding layer 500, forming a three-dimensional image with a bulging central region. In addition, the three-dimensional image may have a shape in which the luminous intensity decreases with increasing distance from the central region of the light-shielding layer 500.

[0128] 20, the light-shielding layer 500 may include an opening 510 including a plurality of openings. The plurality of openings may include a plurality of first openings 511 arranged in a region corresponding to the first region A1 of the resin layer 410. The plurality of first openings 511 are arranged with regularity in the first region A1. At least one of the plurality of first openings 511 may include a plurality of unit openings. For example, the first opening 511 may include a first unit opening 5111, a second unit opening 5112, and a third unit opening 5113. The first unit opening 5111 may be spaced apart from the third unit opening 5113 in the first direction. The second unit opening 5112 may be arranged between the first and third unit openings 5111 and 5113 to connect the unit openings 5111 and 5113. As a result, the first to third unit openings 5111, 5112, and 5113 are connected to each other.

[0129] The first to third unit openings 5111, 5112, and 5113 may have set sizes. For example, the first to third unit openings 5111, 5112, and 5113 may have the same length in the first direction. Furthermore, the first to third unit openings 5111, 5112, and 5113 may have different lengths in the second direction. In particular, the second unit opening 5112 may have a longer length in the second direction than the first unit opening 5111, and the third unit opening 5113 may have a longer length in the second direction than the second unit opening 5112.

[0130] As a result, the light pattern emitted through each of the first to third unit openings 5111, 5112, and 5113 and passing through the optical layer 700 may form a linear three-dimensional image. The linear shape of the light pattern may include a curve. Specifically, the light emitted through each of the first to third unit openings 5111, 5112, and 5113 may have a linear shape extending from a first side surface S1 adjacent to the first opening 511 toward the second side surface S2. The light pattern has a reduced luminous intensity as it moves away from the first opening 511. Therefore, when viewed from the outside, the width of the light pattern in the first direction appears to gradually decrease from the first side surface S1 toward the second side surface S2. Furthermore, the lengths of the first to third unit openings 5111, 5112, and 5113 in the second direction may be different in the lighting device 1000. As a result, the first unit opening 5111, which is relatively short in the second direction, has a shorter length in the second direction of the light pattern formed by the third unit opening 5113, which is relatively long in the second direction.

[0131] 20a and 20b, the opening 510 is disposed only in the area corresponding to the first area A1. That is, no additional opening is formed in the second area A2 or the central area of ​​the light-blocking layer 500. In this case, the second light source 220 disposed in the second area A2 does not emit light. Alternatively, although not shown in the drawings, the second light source 220 may be omitted.

[0132] The lighting device 1000 according to the embodiment may provide a linear three-dimensional image by using a point light source with uniform intensity emitted through the opening 510 formed in the light-blocking layer 500. In particular, the lighting device 1000 may provide various three-dimensional images by controlling the shape, size, and position of the plurality of openings included in the opening 510. The lighting device 1000 may include a resin layer 410 for guiding light emitted from the light source unit 200, and the resin layer 410 may include grooves 450 extending in one direction from between the plurality of light sources. As a result, the lighting device 1000 may minimize light loss and prevent or minimize light emitted from a predetermined region from moving to other regions, thereby providing a clearer three-dimensional image.

[0133] 21 to 23 are diagrams illustrating examples in which a lamp including an illumination device according to an embodiment is applied to a vehicle. Specifically, Fig. 21 is a top view of a vehicle to which a lamp having the illumination device is applied, Fig. 22 is an example in which an illumination device according to an embodiment is disposed at the front of a vehicle, and Fig. 23 is an example in which an illumination device according to an embodiment is disposed at the rear of a vehicle.

[0134] 21 to 23, a lighting device 1000 according to the embodiment may be applied to a vehicle 2000. One or more of the lamps may be disposed at at least one of the front, rear, and side of the vehicle 2000. For example, referring to FIG. 22, a lamp including the lighting device 1000 may be applied to a front lamp 2100 of a vehicle. The front lamp 2100 may include a first cover member 2110 and at least one first lamp module 2120 including the lamp. The first cover member 2110 accommodates the first lamp module 2120 and may be made of a light-transmitting material. The first cover member 2110 may have a curve depending on the design of the vehicle 2000, and may be provided with a flat or curved surface depending on the shape of the first lamp module 2120. The front lamp 2100 may provide multiple functions by controlling the driving timing of the lighting device 1000 included in the first lamp module 2120. For example, the front lamp 2100 may provide at least one function of a headlight, a turn signal light, a daytime running light, a high beam, a low beam, and a fog lamp by emitting light from the lighting device 1000. In addition, the front lamp 2100 may provide additional functions such as a welcome light or a celebration effect when a driver opens a vehicle door, and may provide information to vehicles or people located in front or to the side by forming a signal. At this time, light emitted from the front lamp 2100 is emitted in the form of a three-dimensional image.

[0135] 23, a lamp including the lighting device 1000 may be applied to a vehicle rear lamp 2200. The rear lamp 2200 may include a second cover member 2210 and at least one second lamp module 2220 including the lamp.

[0136] The second cover member 2210 accommodates the second lamp module 2220 and may be made of a light-transmitting material. The second cover member 2210 may be curved depending on the design of the vehicle 2000 and may be flat or curved depending on the shape of the second lamp module 2220. The rear lamp 2200 may provide multiple functions by controlling the driving timing of the lighting device 1000 included in the second lamp module 2220. For example, the rear lamp 2200 may provide at least one of a side light, a brake light, and a turn signal by emitting light from the lighting device 1000, and may provide information to vehicles or people located behind or to the side by forming a signal. At this time, light emitted from the rear lamp 2200 is emitted in the form of a three-dimensional image. Here, the three-dimensional image is an image visually recognized when a person outside the vehicle 2000 looks at the front lamp 2100 and / or the rear lamp 2200. The three-dimensional image can be realized by the contrast of light and dark having a difference between the brightest and darkest areas by the opening 510 and the optical layer 700, or by using the depth or difference in luminance to give a three-dimensional effect.

[0137] The features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment can be combined or modified in other embodiments by a person skilled in the art to which the embodiment belongs. Therefore, the contents related to such combinations and modifications should be interpreted as being included within the scope of the present invention.

[0138] Furthermore, although the above description has focused on the embodiments, these are merely examples and are not intended to limit the present invention. A person skilled in the art to which the present invention pertains may make various modifications and applications not exemplified above within the scope of the essential characteristics of the present embodiments. For example, each component specifically presented in the embodiments may be modified and implemented. Differences related to such modifications and applications should be construed as being included within the scope of the present invention as defined by the appended claims.

Claims

1. A substrate; a light source unit disposed on the substrate; a resin layer disposed on the substrate and covering the light source unit; a light-shielding layer disposed on the resin layer and having an opening; an optical layer disposed on the light-shielding layer, the light source unit includes a plurality of first light sources arranged in a first region of the resin layer and a plurality of second light sources arranged in a second region of the resin layer; the resin layer includes a groove disposed between the first and second regions; the resin layer includes first and second side surfaces facing in a second direction and third and fourth side surfaces facing in a first direction; the first direction is perpendicular to the second direction, the plurality of first light sources are disposed between the first side surface of the resin layer and the groove; the plurality of second light sources are disposed between the second side surface of the resin layer and the groove; a light-emitting surface of each of the plurality of first light sources faces a first side surface of the resin layer; a light-emitting surface of each of the second light sources faces a second side surface of the resin layer; The opening includes a plurality of first openings arranged with regularity and a plurality of second openings spaced apart from the plurality of first openings with regularity.

2. the resin layer is disposed between the first and second regions and includes a connecting portion connecting the first and second regions; The lighting device according to claim 1 , wherein the length of the connecting portion in the first direction is 2 mm or more.

3. the plurality of first light sources are spaced apart from one another in a first direction; The lighting device according to claim 1 , wherein the second light sources are spaced apart from one another in the first direction.

4. a length of the groove in the first direction is longer than a length of the first region in which the plurality of first light sources are arranged, 4. The lighting device according to claim 3, wherein a length in the first direction of the first region in which the plurality of first light sources are arranged is a length in the first direction from one end of a firstly arranged light source among the plurality of first light sources to the other end of a lastly arranged light source.

5. The lighting device according to claim 1 , wherein each of the second openings is disposed in a region corresponding to the first openings in the second direction or a region corresponding to a region between the first openings.

6. the opening portion further includes a plurality of third openings disposed in a central region of the light-shielding layer; the plurality of third openings overlap the grooves in a vertical direction; The lighting device according to claim 1 , wherein the vertical direction is orthogonal to the first and second directions.

7. A substrate; a light source unit disposed on the substrate; a resin layer disposed on the substrate and covering the light source unit; a light-shielding layer disposed on the resin layer and having an opening; an optical layer disposed on the light-shielding layer, the openings include a plurality of first openings arranged with regularity and a plurality of second openings arranged with regularity; light emitted from the light source unit is transmitted to the optical layer through the plurality of first openings and the second openings, the light source unit includes a plurality of first light sources arranged in a first region of the resin layer and a plurality of second light sources arranged in a second region of the resin layer; the resin layer includes a groove disposed between the first and second regions; the resin layer includes first and second side surfaces facing in a second direction and third and fourth side surfaces facing in a first direction; the first direction is perpendicular to the second direction, the plurality of first light sources are disposed between the first side surface of the resin layer and the groove; the plurality of second light sources are disposed between the second side surface of the resin layer and the groove; The pattern of light emitted to the outside through the optical layer includes a line shape.

8. The lighting device according to claim 7 , wherein the number of the plurality of first openings is greater than the number of the plurality of first light sources.

9. At least one of the plurality of first openings is a first unit opening; a third unit opening spaced apart from the first unit opening in a first direction; a second unit opening disposed between the first and third unit openings and connecting the first and third unit openings, The first to third unit openings have the same length in the first direction, a length of the second unit opening in a second direction is greater than a length of the first unit opening, and a length of the third unit opening is greater than a length of the second unit opening; The lighting device according to claim 8 , wherein the second direction is a direction perpendicular to the first direction.

10. The lighting device according to claim 7 , wherein the resin layer includes a connecting portion disposed between the first and second regions and connecting the first and second regions.

11. the second openings are arranged in a region between the first openings spaced apart in a first direction and a region corresponding to the first openings in a second direction; The lighting device according to claim 10 , wherein the second direction is perpendicular to the first direction.

12. a virtual straight line connecting the centers of the plurality of first openings; The lighting device according to claim 11 , wherein lengths in the second direction between each of the second openings and the virtual straight line are different.

13. 13. The lighting device according to claim 12, wherein a length in the second direction between each of the plurality of second openings and the virtual straight line decreases from an initially arranged light source to a last arranged light source among the plurality of second light sources.

14. the opening portion further includes a plurality of third openings disposed in a central region of the light-shielding layer; The lighting device according to claim 11 , wherein the third openings overlap the grooves in a vertical direction.

15. further comprising a reflective layer disposed between the substrate and the resin layer; The lighting device of claim 1 , wherein the reflective layer vertically overlaps the opening.

16. The illumination device according to claim 1 , wherein the opening does not overlap the light source portion in the vertical direction.

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