Lighting device

Abstract

The lighting device disclosed in the embodiment includes: a substrate; a light source portion disposed on the substrate; a resin layer disposed on the substrate and covering the light source portion; a light-shielding layer disposed on the resin layer and having an opening; and an optical layer disposed on the light-shielding layer, wherein the light source portion includes a plurality of first light sources disposed in a first region of the resin layer and a plurality of second light sources disposed in a second region of the resin layer, wherein the resin layer includes a groove disposed between the first region and the second region.

Description

Technical Field

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

[0002] A lighting device is a device that supplies or controls the amount of light and is used in various fields. For example, lighting devices can be applied to various fields such as vehicles and buildings to illuminate the interior or exterior. Recently, light-emitting devices have been used as light sources for lighting. Compared with traditional light sources such as fluorescent lamps and incandescent lamps, light-emitting devices such as light-emitting diodes (LEDs) have advantages such as low power consumption, semi-permanent lifespan, fast response speed, safety, and environmental friendliness. These LEDs are used in various optical components such as various display devices, indoor lights, or outdoor lights. Typically, lights of various colors and shapes are used in vehicles, and recently, the use of LED-based lights as vehicle light sources has been proposed. For example, LEDs are used in vehicle headlights, taillights, turn signals, etc. However, such LEDs have the problem of a relatively small emission angle of the emitted light. Therefore, when LEDs are used as vehicle lights, there is a need to increase the light-emitting area of ​​the lamp.

[0003] When a lamp includes a light-emitting diode (LED), there are problems such as LED performance degradation or reduced uniformity of emitted light due to heat generated when the LED emits light, and the formation of hot spots by the emitted light. In this case, when using the lamp to achieve a surface light source, there is a problem of deterioration in the uniformity of the emitting surface. Typically, when LEDs are used in automotive lights, there is a problem with the LEDs being visually identifiable from the outside. For example, when the headlights are on, the light emitted by the light source may not be visually identifiable. There is a problem of performance degradation. Since LEDs emit light as point sources and are matched with one LED for each individual image of three-dimensional lighting, multiple LEDs are needed to realize all the multiple individual images. Furthermore, when using the same LEDs, the width of each image in the stereoscopic lighting is the same, making it impossible to express the diversity of the images. Therefore, when LEDs are used as automotive lights, there are limitations in reducing the number of LEDs and realizing various images. Therefore, a new type of lighting device and lamp that can solve the above problems is needed. Summary of the Invention

[0004] Technical issues

[0005] The embodiments aim to provide an illumination device and lamp capable of providing a uniform point light source through an opening. The embodiments also provide an illumination device and lamp capable of providing one or more stereoscopic images. Furthermore, the embodiments provide an illumination device and lamp capable of providing stereoscopic images with various shapes.

[0006] Technical solution

[0007] The lighting device according to an embodiment includes: a substrate; a light source portion disposed on the substrate; a resin layer disposed on the substrate and covering the light source portion; a light-shielding layer disposed on the resin layer and having an opening; and an optical layer disposed on the light-shielding layer, wherein the light source portion includes a plurality of first light sources disposed in a first region of the resin layer and a plurality of second light sources disposed in a second region of the resin layer, wherein the resin layer includes a groove disposed between the first region and the second region.

[0008] According to an embodiment of the present invention, the resin layer may include a first side surface and a second side surface facing in a second direction, as well as a third side surface and a fourth side surface facing in the first direction, wherein the first direction is orthogonal to the second direction, and wherein the light-emitting surface of each of the plurality of first light sources may face the first side surface of the resin layer. The plurality of first light sources may be disposed between the first side surface of the resin layer and a groove, and the plurality of second light sources may be disposed between the second side surface of the resin layer and the groove.

[0009] According to an embodiment of the present invention, the resin layer includes a connecting portion disposed between the first region and the second region and connecting the first region and the second region, and the length of the connecting portion in a first direction is 2 mm or more.

[0010] According to an embodiment of the present invention, a plurality of first light sources are spaced apart from each other in a first direction, and a plurality of second light sources are spaced apart from each other in the first direction. The plurality of first light sources can be arranged in a row, and the plurality of second light sources can be arranged in a row.

[0011] According to an embodiment of the present invention, the length of the groove in the first direction is longer than the length of the region in the first direction where the plurality of first light sources are disposed, and the length of the region in the first direction where the plurality of first light sources are disposed can be defined as the length in the first direction from one end of the first light source disposed at the first position to the other end of the last light source disposed at the last position. The opening portion may include a plurality of first openings arranged regularly and a plurality of second openings arranged regularly spaced apart from the plurality of first openings. Each of the plurality of second openings may be disposed in a region corresponding to the plurality of first openings in the second direction. Each of the plurality of second openings may be disposed in a region corresponding to the region between the plurality of first openings spaced apart from each other in the first and second directions. The opening portion may include a plurality of third openings disposed in the central region of the light-shielding layer, and the plurality of third openings may overlap with the groove in the vertical direction, wherein the vertical direction may be orthogonal to the first and second directions.

[0012] The lighting device according to an embodiment includes a substrate; a light source portion disposed on the substrate; a resin layer disposed on the substrate and covering the light source portion; a light-shielding layer disposed on the resin layer and having an opening portion; and an optical layer disposed on the light-shielding layer, wherein the opening portion includes a plurality of regularly arranged first openings, and light emitted from the light source portion is transmitted to the optical layer through the plurality of first openings and can pass through the optical layer and be emitted to the outside.

[0013] According to an embodiment of the present invention, the light source portion may include a plurality of first light sources disposed 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.

[0014] According to an embodiment of the present 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 disposed between the first unit opening and the third unit opening and connecting the first unit opening and the third unit opening, wherein the lengths of each of the first unit opening to the third unit opening are the same in the first direction, and wherein, in the second direction, the length of the second unit opening 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 may be a direction perpendicular to the first direction.

[0015] According to an embodiment of the present invention, the resin layer may include a second region spaced apart from the first region, a groove disposed between the first region and the second region, and a connecting portion disposed between the first region and the second region and connecting the first region and the second region.

[0016] According to an embodiment of the present invention, the opening portion includes a plurality of regularly arranged second openings, and the plurality of second openings are disposed in a region corresponding to a plurality of first openings spaced apart from each other along a first direction in a second direction, and the second direction may be a direction perpendicular to the first direction. A virtual straight line connecting the centers of the plurality of first openings may be included, and the length of each of the plurality of second openings in the second direction relative to the virtual straight line may be different from each other. The length of each of the plurality of second openings in the second direction relative to the virtual straight line may decrease from a 2-1 light source disposed at the first of the plurality of second light sources to a 2-n light source disposed adjacent to the last. The opening portion may also include a third opening disposed in the central region of the light-shielding layer. Light emitted from the light source portion can be transmitted to the optical layer through the opening portion, and the light pattern formed through the optical layer may include a linear shape.

[0017] According to embodiments of the present invention, a reflective layer disposed between the substrate and the resin layer may be included, and the reflective layer may overlap with the opening portion in the vertical direction.

[0018] According to an embodiment of the present invention, the opening portion may not overlap with the light source portion in the vertical direction. Alternatively, the opening portion may partially overlap with the light source portion in the vertical direction. According to an embodiment of the present invention, the light-shielding layer and the optical layer may be spaced apart.

[0019] The lighting device according to an embodiment includes: a substrate; a light source portion disposed on the substrate; a resin layer disposed on the substrate and covering the light source portion; 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 long axis along the direction of the light-emitting surface of the light source portion, the opening includes a plurality of openings, and light emitted from the light source portion is incident on the optical layer through the openings, and the light pattern formed by passing through the optical layer may include a linear shape, and the number of linear shapes may be less than or equal to the number of the plurality of openings.

[0020] According to embodiments of the present invention, the linear shape may include a curve, and the width of the light pattern having the linear shape may vary depending on the width of the opening portion. According to embodiments of the present invention, the opening portion 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 may be disposed in regions corresponding to the plurality of first openings in a second direction, and the second direction may be perpendicular to the first direction. The plurality of second openings may be disposed in regions corresponding to the regions of the plurality of first openings spaced apart along the first direction in a second direction, and the second direction may be perpendicular to the first direction. The length of at least one of the plurality of first openings in the first direction may be greater than the length of at least one of the plurality of second openings in the first direction.

[0021] According to an embodiment of the present invention, light emitted from the light source portion is transmitted to the optical layer through a first opening, and the light pattern formed through the optical layer has the form of extending from one side of the resin layer adjacent to the first opening to the other side opposite to that side, and in the optical pattern, the width of the region adjacent to one side of the resin layer in a first direction may be greater than the width of the region adjacent to the other side of the resin layer in a first direction.

[0022] According to an embodiment of the present invention, the opening portion includes at least one third opening disposed in the region between the first opening and the second opening and in the central region of the light-shielding layer. A portion of the light emitted from the light source portion can be transmitted to the optical layer through the third opening, and the light pattern formed through the optical layer can have a shape symmetrical with respect to the central region of the light-shielding layer. The third opening can be disposed in the region between a plurality of first openings spaced apart along a first direction and in a corresponding region in a second direction, and the second direction can be a direction perpendicular to the first direction.

[0023] Beneficial effects

[0024] The lighting device and lamp according to the embodiments can provide one or more stereoscopic images. Specifically, the lighting device may include a lighting module and an optical layer disposed on the lighting module. Furthermore, the lighting module may include one or more openings, and light emitted through the openings can be provided by the optical layer as a stereoscopic image having one or more lines. Moreover, the lighting device and lamp according to the embodiments can provide stereoscopic images with various shapes. Specifically, the lighting device according to the embodiments can control the number, shape, size, position, etc., of the openings. Therefore, the stereoscopic image passing through the optical layer can have various widths, lengths, brightness, and shapes.

[0025] The lighting device and lamp according to the embodiments can have improved light characteristics. Specifically, the lighting device and lamp can include a lighting module comprising a light source portion and a resin layer sealing the light source portion, and the resin layer can effectively guide light emitted from the light source portion. Therefore, the lighting module can provide light with uniform intensity. Specifically, the lighting device according to the embodiments can provide a uniform surface light source in the direction of the upper surface of the lighting module. Therefore, regardless of the number and position of the openings, the lighting module can emit a point light source with uniform intensity through the openings.

[0026] According to an embodiment, the resin layer of the illumination device may include grooves extending in one direction between multiple light sources. In this case, the grooves may be longer than the length in one direction in which the multiple light sources are disposed. That is, the grooves can separate areas of the resin layer and can prevent or minimize the movement of light directed in each area of ​​the resin layer to another area. Therefore, the illumination device can prevent light from multiple areas from being mixed, thereby providing a clearer stereoscopic image.

[0027] The components included in the lighting device according to the embodiment may have a set thickness. Therefore, the lighting device can be provided in a flexible form, and the lighting device can be applied to lamp housings, brackets, etc., having various curved shapes. Attached Figure Description

[0028] Figure 1 This is a top view of the lighting device according to an embodiment.

[0029] Figure 2 This is a top view of the resin layer of the lighting device according to an embodiment.

[0030] Figure 3 This is a cross-sectional view of a lighting device according to an embodiment.

[0031] Figure 4 yes Figure 3 An enlarged cross-sectional view of the area.

[0032] Figure 5 This is a cross-sectional view of the optical layer of the lighting device according to an embodiment.

[0033] Figures 6 to 11 This is another cross-sectional view of the lighting device according to the embodiment.

[0034] Figures 12 to 16 This is a diagram used to explain the various openings in the light-shielding layer of the lighting device according to an embodiment.

[0035] Figure 17a and Figures 17b to 20a and Figure 20b It is a diagram used to explain a three-dimensional image formed based on various opening shapes in a lighting device according to an embodiment.

[0036] Figures 21 to 23 This is a diagram illustrating an example of a lamp, including a lighting device according to an embodiment, applied to a vehicle. Detailed Implementation

[0037] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] The technical spirit of this invention is not limited to the embodiments described herein, and can be implemented in various other forms. One or more components may be selectively combined and substituted within the scope of the technical spirit of this invention. Furthermore, the terminology (including technical and scientific terms) used in the embodiments of this invention, unless specifically defined and explicitly described, may be interpreted in a meaning that is generally understood by one of ordinary skill in the art to which this invention pertains, and general terms such as those defined in dictionaries should be able to interpret their meaning in the context of the relevant art. Moreover, the terminology used in the embodiments of this invention is for explaining the embodiments and is not intended to limit the invention. In this specification, unless otherwise specifically stated in the wording, the singular form may also include the plural form, and in the case of statements of at least one (or more) of A and / or B, C, it may include one or more of all combinations that can be combined with A, B, and C. In describing components of embodiments of this invention, terms such as first, second, A, B, (a), and (b) may be used. Such terms are used only to distinguish that component from other components and may not be determined by terms describing the nature, order, or sequence of the corresponding constituent elements. Furthermore, when describing a component as being "connected," "joined," or "engaged" to another component, this description can include not only the component being directly connected, joined, or engaged to the other component, but also the component being "connected," "joined," or "engaged" through another component between the two components. Additionally, when described as being formed or disposed "above" or "below" each component, this description includes not only cases where the two components are in direct contact with each other, but also cases where one or more other components are formed or disposed between the two components. Moreover, when expressed as "above" or "below," it can indicate a downward direction relative to an element and an upward direction relative to an element.

[0039] The lighting device according to the present invention can be applied to various lighting devices requiring illumination, such as automotive lights, household optical components, and industrial optical components. For example, when applied to automotive lights, it can be used for headlights, side mirror lights, side marker lights, fog lights, taillights, brake lights, daytime running lights, vehicle interior lighting, door lights, rear combination lights, reversing lights, etc. Furthermore, when applied to automotive lights, it is suitable for rear side assist systems (BSD) mounted on side mirrors or A-pillars. In addition, the optical components of the present invention can be applied to indoor and outdoor advertising devices, display devices, and various electric vehicle applications.

[0040] In the description of embodiments of the present invention, the first direction may represent the x-axis direction shown in the figures, the second direction may represent the y-axis direction shown in the figures, and the third direction may represent the z-axis direction shown in the figures. Furthermore, the horizontal direction may represent the first direction and the second direction, and the vertical direction may represent a third direction perpendicular to at least one of the first and second directions. For example, the horizontal direction may represent the x-axis and y-axis directions in the figures, and the vertical direction may be the z-axis direction in the figures and a direction perpendicular to the x-axis and y-axis directions.

[0041] Figure 1 This is a top view of the lighting device according to an embodiment, and Figure 2 This is a top view of the resin layer of the lighting device according to an embodiment. Figure 3 This is a cross-sectional view of the lighting device according to an embodiment. Figure 4 yes Figure 3 An enlarged sectional view of the area, and Figure 5 This is a cross-sectional view of the optical layer of the lighting device according to an embodiment.

[0042] Reference Figures 1 to 5 The lighting device 1000 according to an embodiment may include a lighting module and an optical layer 700 disposed on the lighting module. The lighting module includes a substrate 100, a light source portion 200, a resin layer 410, and a light-shielding layer 500. The lighting module can provide light from a point light source having uniform point intensity. For example, light emitted from the light source portion 200 and passing through the resin layer 410 can be emitted as a surface light source having uniform intensity. In this case, a light-shielding layer 500 including one or more openings can be disposed on the resin layer 410. Therefore, light passing through the resin layer 410 and the light-shielding layer 500 can be emitted as a point light source corresponding to the opening portion and having uniform intensity. Subsequently, the point light source can be transmitted to the optical layer 700 disposed on the lighting module, and the light passing through the optical layer 700 can be emitted in the form of a stereoscopic image or a three-dimensional image. In this case, the stereoscopic image is an image recognized when a person views the lighting device 1000 from the outside, and is realized as the contrast between the brightest and darkest areas, or a three-dimensional effect in a three-dimensional form can be given by using differences in depth or luminous intensity.

[0043] The lighting module can have a set thickness. In the third direction (z-axis direction) from the lower surface of the substrate 100 to the upper surface of the light-shielding layer 500, the thickness of the lighting module can be approximately 5 mm or less. Specifically, the thickness of the lighting module can be from approximately 2 mm to approximately 5 mm. When the thickness of the lighting module is less than approximately 2 mm, the reliability of the lighting module may deteriorate. Furthermore, when the thickness of the lighting module exceeds approximately 5 mm, it may be difficult to provide a flexible form of lighting module, thus making it difficult to apply the lighting module to housings, brackets, etc., of lamps with various curved shapes.

[0044] The configuration of the lighting device 1000 will be described in more detail below.

[0045] Substrate 100 may include a printed circuit board (PCB) with wiring. For example, substrate 100 may include a resin-based 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) may be disposed on substrate 100. The wiring layer may be electrically connected to light source portion 200. For example, when light source portion 200 includes multiple light sources, the multiple light sources may be connected in series, in parallel, or in a series-parallel connection via the wiring layer. Substrate 100 may be disposed below light source portion 200 and resin layer 410 to perform the functions of a substrate member and a support member. Substrate 100 may have a thickness of about 100 μm to about 2 mm. More specifically, substrate 100 may have a thickness of about 150 μm to about 1.8 mm. More specifically, substrate 100 may have a thickness of about 200 μm to about 1.6 mm. When substrate 100 has a thickness of less than about 100 μm, it may be difficult to effectively support the configuration disposed on substrate 100, such as light source portion 200, resin layer 410, etc. Furthermore, if the substrate 100 is too thin, reliability issues may arise. Additionally, when the thickness of the substrate 100 exceeds approximately 2 mm, the overall thickness of the lighting device 1000 may increase, and the flexibility of the substrate 100 may decrease. Therefore, the substrate 100 preferably meets the aforementioned requirements.

[0046] The substrate 100 may further include a connector (not shown) disposed on a portion thereof. The substrate 100 can provide power applied to the light source portion 200 via the connector. The connector may be formed in at least one of the upper and lower surfaces of the substrate 100. For example, when the connector is disposed on the upper surface (on which the light source portion 200 and the resin layer 410 are disposed), the connector may be disposed on a region of the substrate 100 where the resin layer 410 is not disposed. Alternatively, when the connector is disposed on the lower surface of the substrate 100, the resin layer 410 may be disposed over the entire area or more than 80% of the area of ​​the upper surface of the substrate 100.

[0047] The light source portion 200 can be disposed on the substrate 100. For example, the light source portion 200 can be disposed on the upper surface of the substrate 100 facing the light-shielding layer 500. The light source portion 200 can emit light in at least one direction. The light source portion 200 can emit light laterally in the resin layer 410. The light source portion 200 includes an LED chip and is disposed in a side-view package, and the light-emitting surface of the light source portion 200 can face the side surface of the resin layer 410. In this case, the LED chip can include at least one of a blue LED chip, a red LED chip, and a green LED chip. Each package can include an LED chip of one color, multiple LED chips of the same color, or multiple LED chips of different colors.

[0048] The light source portion 200 may include a first light source 210 and a second light source 220. The first light source 210 may be disposed in a first region A1 of the resin layer 410. The first light source 210 may be configured to face a first side surface S1 of the resin layer 410. Specifically, the first light source 210 may be configured such that the 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 first light sources 210 may be disposed on the substrate 100. The plurality of first light sources 210 may be spaced apart from each other and arranged in a row on the substrate 100. For example, the plurality of first light sources 210 may be spaced apart from each other in a first direction (x-axis direction), arranged in a row as shown in the figure, and may include light source 210a 1-1, light source 210b 1-2, light source 210c 1-3, and light source 210d 1-4. In this configuration, light source 210a (1-1) can be the first light source 210 disposed first among the first light sources 210, and light source 210d (1-4) can be the last first light source 210 disposed last among the first light sources 210. The second light source 220 can be disposed in a second region A2 of the resin layer 410, spaced apart from the first region A1. The second region A2 can be a region spaced apart from the first region A1 in a second direction (y-axis direction). The second light source 220 can be configured to face a side surface of the resin layer 410 that is different from the first side surface S1. The second light source 220 can be configured to face both the first side surface S1 and the second side surface S2 of the resin layer 410 in the second direction (y-axis direction). Specifically, the second light source 220 can be configured such that the 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.

[0049] Multiple second light sources 220 can be disposed on the substrate 100. The number of second light sources 220 can be the same as the number of first light sources 210. The second light sources 220 can be spaced apart from each other and arranged in a row on the substrate 100. For example, the multiple second light sources 220 are spaced apart from each other in a first direction and may include 2-1 light sources 220a, 2-2 light sources 220b, 2-3 light sources 220c, and 2-4 light sources 220d arranged in a row as shown in the figure. In this case, 2-1 light source 220a may be the first second light source 220 disposed among the second light sources 220, and 2-4 light source 220d may be the last second light source 220 disposed among the second light sources 220. However, the embodiment is not limited to this, and the number of multiple second light sources 220 may be greater than or less than the number of first light sources 210. The multiple second light sources 220 can be disposed in regions corresponding to the multiple first light sources 210. For example, the multiple second light sources 220 can be disposed in regions corresponding to the multiple first light sources 210 along a second direction (y-axis direction). Alternatively, the plurality of second light sources 220 can be disposed in the region between the plurality of first light sources 210 spaced apart from each other along the first direction, in the corresponding region along the second direction. That is, when viewed from above, the first light sources 210 and the second light sources 220 can be arranged in a sawtooth pattern.

[0050] Multiple first light sources 210 and multiple second light sources 220 can emit light simultaneously. For example, when power is applied to the light source portion 200, the multiple first light sources 210 can emit light toward the first side surface S1, and the multiple second light sources 220 can emit light toward the second side surface S2. Alternatively, the first light sources 210 and the second light sources 220 can emit light independently. For example, when power is applied to the light source portion 200, only one light source selected from either the first light source 210 or the second light source 220 can emit light toward the corresponding side surface of the resin layer 410. Alternatively, each of the multiple first light sources 210 and the multiple second light sources 220 can emit light independently. For example, when power is applied to the light source portion 200, each of the multiple first light sources 210 and each of the multiple second light sources 220 can emit light independently. Therefore, the lighting device 1000 according to the embodiment can completely or selectively control the multiple light sources included in the light source portion 200, thereby providing stereoscopic images capable of providing various shapes and various movements.

[0051] Resin layer 410 can be disposed on substrate 100. Resin layer 410 can be disposed on the upper surface of substrate 100. Resin layer 410 can be disposed on the entire upper surface or a portion thereof of substrate 100. Resin layer 410 can be formed of a transparent material. Resin layer 410 can contain resin materials such as silicone resin or epoxy resin. Resin layer 410 can contain thermosetting resin materials, for example, selectively including PC, OPS, PMMA, PVC, etc. Resin layer 410 can be formed of glass, but is not limited thereto. For example, the main material of resin layer 410 can be a resin material having a polyurethane acrylate oligomer as the main material. For example, a mixture of a polyurethane acrylate oligomer as the synthetic oligomer and a polymer as polyacrylic acid can be used. Of course, low-boiling-point dilution reactive monomers such as IBOA (isobornyl acrylate), HPA (hydroxypropyl acrylate), and 2-HEA (hydroxyethyl 2-acrylate) can also be included as additives, and photoinitiators (such as 1-hydroxycyclohexylphenyl ketone) or antioxidants can be mixed in.

[0052] Since the resin layer 410 is configured as a light-guiding layer of resin, it can be configured to have a thickness thinner than that of glass and can be configured as a flexible plate. The resin layer 410 can emit a point light source emitted from the light source portion 200 in the form of a line light source or a surface light source. The upper surface of the resin layer 410 can emit light by diffusing the light emitted from the light source portion 200. For example, beads (not shown) can be included in the resin layer 410, and the beads can diffuse and reflect the incident light to increase the light intensity. The beads can be configured in an amount of 0.01% to 0.3% based on the weight of the resin layer 410. The beads can be composed of any of silicon, silica, glass bulb, polymethyl methacrylate (PMMA), urethane, Zn, Zr, Al2O3, and acrylic acid, and the particle size of the beads can be in the range of about 1 μm to about 20 μm, but is not limited thereto.

[0053] The resin layer 410 may have lengths W1 and W2 in a first direction and a second direction (x-axis and y-axis). For example, the length W1 of the resin layer 410 in the first direction may be greater than or equal to the length W2 in the second direction. For example, when the first light source 210 and the second light source 220 are arranged in a row along the first direction, the length W1 of the resin layer 410 in the first direction may be greater than the length W2 in the second direction. The resin layer 410 may have a set thickness (third direction or z-axis direction). The resin layer 410 may be less than 4 mm. When the thickness h2 of the resin layer 410 is less than about 0.5 mm, the light source is exposed on the upper surface of the resin layer 410. Specifically, the thickness h2 of the resin layer 410 may be from about 0.5 mm to about 4 mm. More specifically, the thickness h2 of the resin layer 410 may be from about 1 mm to about 4 mm. More specifically, the thickness h2 of the resin layer 410 may be from about 1.4 mm to 4 mm, and can effectively guide the light to be emitted from the light source portion 200. Furthermore, when the thickness h2 of the resin layer 410 exceeds approximately 4 mm, the overall optical path may increase. Therefore, when light emitted from the light source portion 200 is emitted, light loss may occur. Therefore, the thickness h2 of the resin layer 410 preferably meets the aforementioned range.

[0054] The resin layer 410 can be configured to surround the light source portion 200. The resin layer 410 can seal the light source portion 200. The resin layer 410 can protect the light source portion 200 and prevent or minimize the loss of light emitted from the light source portion 200. The resin layer 410 can contact the surface of the light source portion 200 and the light-emitting surface of the light source portion 200. Furthermore, the resin layer 410 can contact the upper surface of the substrate 100. That is, the resin layer 410 can support the substrate 100 and the light source portion 200, and can support the light source portion 200 to be positioned at a designated location.

[0055] The resin layer 410 may include multiple 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 configured to be closer to the first light source 210 than the second light source 220. The first side surface S1 may face the light-emitting surface of the first light source 210. The second side surface S2 may be the side facing the first side surface S1. For example, the second side surface S2 may face the first side surface S1 in the second direction (y-axis direction). The second side surface S2 may be configured to be closer to the second light source 220 than the first light source 210. The second side surface S2 may face the light-emitting surface of the second light source 220. The first side surface S1 and the second side surface S2 may be planar or curved. Furthermore, the first side surface S1 and the second side surface S2 may be spaced apart from each other at a set 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. Furthermore, the interval between the first side surface S1 and the second side surface S2 in the second direction may be changed. For example, the spacing between the first side surface S1 and the second side surface S2 in the second direction can gradually increase or decrease along the first direction, or it can increase or decrease in a wave-like manner. The multiple side surfaces of 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 side surfaces 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. Furthermore, the fourth side surface S4 may be disposed facing 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 side surfaces S1 and S2. For example, one end of the fourth side surface S4 may be connected to the other end of the first side surface S1, and the other end of the fourth side surface S4 may be connected to the other end of the second side surface S2. The third side surface S3 and the fourth side surface S4 may be planar or curved surfaces. Furthermore, the third side surface S3 and the fourth side surface S4 can be spaced apart from each other at a predetermined interval. For example, the interval between the third side surface S3 and the fourth side surface S4 in the first direction (x-axis direction) can be constant. That is, the third side surface S3 and the fourth side surface S4 can be parallel. Moreover, the interval between the third side surface S3 and the fourth side surface S4 in the first direction can be changed. For example, the distance between the third side surface S3 and the fourth side surface S4 in the first direction can gradually increase or decrease along the second direction, or it can increase or decrease in a wave-like manner.

[0056] The resin layer 410 may include multiple regions where the light source portion 200 is disposed. For example, the resin layer 410 may include a first region A1 where a first light source 210 is disposed, and may include a second region A2 where a second light source 220 is disposed. The first region A1 and the second region A2 may be positioned facing each other in a second direction (y-axis direction) and may be spaced apart from each other. Furthermore, the first region A1 and the second region A2 may have corresponding shapes and corresponding areas. The resin layer 410 may include a groove 450 formed between the first region A1 and the second region A2. The groove 450 may be disposed between the first light source 210 and the second light source 220. That is, the first light source 210 may be disposed between the first side surface S1 and the groove 450, and the second light source 220 may be disposed between the second side surface S2 and the groove 450. The groove 450 may be filled with air or a vacuum.

[0057] The groove 450 can be provided in a form that penetrates both the upper and lower surfaces of the resin layer 410. Furthermore, a through-hole formed in the region corresponding to the groove 450 can be formed in the substrate 100. The through-hole of the substrate 100 can have a shape and size corresponding to the groove 450. The groove 450 can have a shape that extends in one direction. Specifically, the groove 450 can extend in a direction corresponding to the direction in which the first light source 210 and the second light source 220 are provided. For example, when the first light source 210 and the second light source 220 are configured to extend along a first direction (x-axis direction), the groove 450 can have a form that extends along the first direction (x-axis direction). In this case, the length W3 of the groove 450 in the first direction can be longer than the length of the light source portion 200 in the first direction. The length W3 of the groove 450 in the first direction can be more than 50% 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 can be longer than the length d1 of the region where the plurality of first light sources 210 are provided. Here, the length d1 of the first direction of the region where multiple first light sources 210 are provided can be defined as the length d1 of the first direction from one end of the first 1-1 light source 210a provided among the multiple first light sources 210 to the other end of the last 1-n light source 210d provided among the multiple first light sources 210. Here, n is 4 or greater.

[0058] The length W3 of the groove 450 in the first direction can be longer than the length d2 of the region where the plurality of second light sources 220 are disposed. Here, the length d2 of the region where the plurality of second light sources 220 are disposed can be defined as the length d2 of the first direction from one end of the first 2-1 light source 220a disposed among the plurality of second light sources 220 to the other end of the last 2-n light source 220d disposed among the plurality of second light sources 220. Here, n is 4 or greater. The groove 450 can have a length W4 in the second direction (y-axis direction). The lengths d1 and d2 in the first direction are the lengths of the two ends of the first light source 210 and the second light source 220, respectively. The length W4 of the groove 450 in the second direction can be about 1 mm or more. More specifically, the length W4 of the groove 450 in the second direction can be 1.5 mm or more. More specifically, the length W4 of the groove 450 in the second direction can be about 2 mm to about 5 mm. When the length W4 of the groove 450 in the second direction is less than about 1 mm, it may be difficult to block the light emitted from the first light source 210 or the second light source 220 from transmitting to the second region A2 or the first region A1. Furthermore, when the length W4 of the groove 450 in the second direction exceeds about 5 mm, the area occupied by the groove 450 in the resin layer 410 increases excessively, which may reduce the light guiding distance of the light source portion 200.

[0059] The resin layer 410 may include a connecting portion 470. The connecting portion 470 may be 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 may be a region of the resin layer 410 where no groove 450 is formed between the first region A1 and the second region A2. 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 be approximately 2 mm or more. The lengths d3 and d4 in the first direction of the connecting portion 470 may be lengths that take into account the reliability of the resin layer 410 and the substrate 100. Furthermore, the length of the connecting portion 470 in a second direction may be the same as the length W4 in the second direction of the groove 450.

[0060] The resin layer 410 may include grooves 450 disposed between a plurality of first light sources 210 and a plurality of second light sources 220. In this case, the length W3 of the groove 450 in the first direction may be greater than the length d1 connecting the two ends of the first light source 210 and / or the length d2 connecting the two ends of the second light source 220. The length W4 of the groove 450 in the second direction may be less than the length W3 in the first direction and may be less than the interval between the first light source 210 and the second light source 220. Therefore, the groove 450 may prevent or minimize the movement of light emitted from the first light source 210 to the second region A2 and the movement of light emitted from the second light source 220 to the first region A1, respectively. Therefore, the illumination device 1000 can provide light with uniform intensity and can clearly provide the set stereoscopic image. Since the resin layer 410 has a connecting portion 470 between the first region A1 and the second region A2 with a first length d3 and a second length d4 and W4, the resin layer 410 can prevent the degradation of optical reliability caused by the groove 450.

[0061] like Figure 3 and Figure 4 As shown, the light-shielding layer 500 can be disposed on the resin layer 410. The light-shielding layer 500 can be disposed at the top of the resin layer 410. The light-shielding layer 500 can be positioned closest to the optical layer 700 among the layers included in the illumination module. The light-shielding layer 500 can contain metallic or non-metallic materials. The light-shielding layer 500 can contain absorbing or reflective materials. The light-shielding layer 500 can absorb or reflect visible light, infrared light, or some ultraviolet light. For example, the light-shielding layer 500 can absorb or reflect wavelengths in the range of 380 nm to 800 nm. For example, the light-shielding layer 500 can be black ink or a black printing layer. The light-shielding layer 500 can be an absorbing material containing carbon or carbon nanotubes, a black resist material, or a black matrix material. As another example, the light-shielding layer 500 can be a reflective layer, for example, it can be formed from a layer containing aluminum (Al) or silver (Ag) or an alloy layer containing at least one of the aforementioned metals. The light-shielding layer 500 can be a single layer or multiple layers. For example, in the case of multiple layers, the multiple layers may include a first layer of black material and a second layer of reflective material, and in this case, the first layer may be disposed on the second layer. A mask can be used to implement the light-shielding layer 500.

[0062] The thickness h3 of the light-shielding layer 500 can be from about 0.1 mm to about 5 mm. When the thickness h3 of the light-shielding layer 500 is less than about 0.1 mm, the light-shielding layer 500 is less effective at blocking light passing through the resin layer 410 and may increase light transmittance. Furthermore, when the thickness h3 of the light-shielding layer 500 exceeds about 5 mm, the light-shielding characteristics can be improved, but the overall weight of the lighting module may increase. In addition, due to the increased overall thickness of the lighting module, it may be difficult to provide a flexible form of lighting module, making it difficult to apply the lighting module to housings, brackets, etc., of lamps with various curved shapes.

[0063] The light-shielding layer 500 may include an opening portion 510. The opening portion 510 may be a hole passing through the upper and lower surfaces of the light-shielding layer 500. The opening portion 510 may include multiple openings (n, where n is a natural number equal to or greater than 3). The multiple openings may have various shapes depending on the stereoscopic image to be achieved. For example, the upper shape of the multiple openings may be a polygonal shape, such as a square, rectangle, triangle, or pentagon, a circle, an ellipse, or an irregular shape. The multiple openings may have the same or different shapes. Furthermore, the multiple openings may have partially identical or partially different shapes. The number of multiple openings may be greater than or equal to the number of light sources included in the light source portion 200. For example, the total number of multiple openings may be greater than the total number of the first light source 210 and the second light source 220.

[0064] 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 in the first direction of the opening can be a factor that controls the width (length in the first direction) of the formed stereoscopic image (linear light pattern). Furthermore, the length W6 in the second direction of the opening can be a factor that controls the brightness and length (length in the second direction) of the formed stereoscopic image (linear light pattern). For example, the lengths W5 in the first direction and W6 in the second direction of each of the plurality of openings may be approximately 3 mm or more. More specifically, the lengths W5 in the first direction and W6 in the second direction of each of the plurality of openings may be approximately 3 mm to approximately 10 mm. When each of the lengths W5 in the first direction and W6 in the second direction of the opening is less than approximately 3 mm, the size of the formed light pattern is too small, making it difficult to visually identify the stereoscopic image from the outside. Furthermore, when each of the lengths W5 in the first direction and W6 in the second direction of the opening exceeds approximately 10 mm, the size of the formed light pattern is too large, making the light pattern potentially not a stereoscopic image viewed from the outside. Therefore, each of the lengths W5 in the first direction and W6 in the second direction of the opening preferably satisfies the above-described range. Furthermore, the length W5 in the first direction and the length W6 in the second direction of each of the multiple openings can be the same as or different from each other within the range described above.

[0065] like Figure 1 As shown, the plurality of openings in the opening portion 510 may include a first opening 511 and a second opening 512. Multiple first openings 511 may be provided and can be arranged regularly. Similarly, multiple second openings 512 may be provided and can be arranged regularly.

[0066] For example, a plurality of first openings 511 may be spaced apart from each other and disposed in a region corresponding to the first region A1 of the resin layer 410. The plurality of first openings 511 may be disposed in the emission path of light emitted from the light source portion 200. For example, when viewed from a top view, the plurality of first openings 511 may be disposed between the first light source 210 and the first side surface S1 of the resin layer 410. In this case, the plurality of first openings 511 may not overlap with the first light source 210 in the vertical direction (z-axis direction). Therefore, it is possible to prevent the formation of hot spots on the first openings 511 by the first light source 210. Alternatively, the first openings 511 may partially overlap with the light source portion 200 in the vertical direction. Therefore, the illumination device 1000 can provide a stereoscopic image with various luminous intensities by intentionally forming hot spots. The plurality of first openings 511 may have a defined shape and size. For example, the plurality of first openings 511 may have the same shape and the same length W5 in the first direction and length W6 in the second direction. Furthermore, the number of the plurality of first openings 511 may be greater than the number of the plurality of first light sources 210. The shape, size, number, etc. of the multiple first openings 511 can be changed according to the stereoscopic image to be achieved.

[0067] Multiple second openings 512 may be spaced apart from each other and disposed in the region corresponding to the second region A2 of the resin layer 410. The multiple second openings 512 may be disposed in the emission path of light emitted from the light source portion 200. For example, when viewed from a top view, the multiple second openings 512 may be disposed between the second light source 220 and the second side surface S2 of the resin layer 410. In this case, the multiple second openings 512 may not overlap with the second light source 220 in the vertical direction (z-axis direction). Therefore, it is possible to prevent the formation of hot spots on the second openings 512 by the second light source 220. Alternatively, the second openings 512 may partially overlap with the light source portion 200 in the vertical direction. Therefore, the illumination device 1000 can provide a stereoscopic image with various luminous intensities by intentionally forming hot spots.

[0068] Multiple second openings 512 may be spaced apart from multiple first openings 511. For example, the second openings 512 may be spaced apart from the first openings 511 in a second direction (y-axis direction). The multiple second openings 512 may have a defined shape and size. For example, the multiple second openings 512 may have the same shape and the same length W5 in the first direction and length W6 in the second direction. The multiple second openings 512 may have the same shape as the multiple first openings 511, as well as the same length W5 in the first direction and length W6 in the second direction. Furthermore, the number of multiple second openings 512 may be greater than the number of multiple second light sources 220. The number of multiple second openings 512 may be different from or equal to the number of multiple second light sources 220. The shape, size, number, etc., of the multiple second openings 512 may be changed according to the stereoscopic image to be achieved.

[0069] Light emitted from the light source portion 200 (e.g., light emitted from a plurality of first light sources 210) can be transmitted to the optical layer 700 through a plurality of first openings 511, and light emitted from a plurality of second light sources 220 can be transmitted to the optical layer 700 through a plurality of second openings 512. The light transmitted to the optical layer 700 can then pass through the optical layer 700 and be emitted to the outside of the illumination device 1000, and can be observed as a linear stereoscopic image. (Refer to the description to be followed later.) Figures 12 to 2 0. Describe in more detail the shape, size, location, etc. of the opening portion 510.

[0070] An optical layer 700 can be disposed on the illumination module. An optical layer 700 can also be disposed on the light-shielding layer 500. The optical layer 700 can form a stereoscopic image by reflecting and / or refracting light incident from the illumination module. The optical layer 700 can have the same planar area as the upper surface of the illumination module, or it can have a larger planar area than the upper surface of the illumination module. The optical layer 700 can be spaced apart from the light-shielding layer 500 by a distance h4 in the vertical direction (z-axis direction). The distance h4 between the optical layer 700 and the light-shielding layer 500 can be constant. Therefore, a first air layer 800 can be formed between the optical layer 700 and the light-shielding layer 500. The distance h4 can be the distance at which light emitted through the opening portion 510 of the light-shielding layer 500 can be diffused. Furthermore, the distance h4 can be a distance at which the size of the stereoscopic image formed by the optical layer 700 can be adjusted. The distance h4 can be approximately 5 mm or more. More specifically, the distance h4 can be approximately 5 mm to approximately 50 mm. More specifically, the distance h4 can be approximately 5 mm to approximately 20 mm. When the interval h4 is less than approximately 5 mm, the size of the stereoscopic image formed by the optical layer 700 is small, and therefore the three-dimensional effect may be difficult to see due to differences in brightness. Furthermore, when the interval h4 exceeds approximately 50 mm, the size of the stereoscopic image formed by the optical layer 700 may increase, potentially degrading the three-dimensional effect. Therefore, the interval h4 between the optical layer 700 and the light-shielding layer 500 preferably satisfies the above-mentioned range.

[0071] 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 incident light from the inside in the emission direction. The transmissive portion 710 may contain a transmissive material. For example, the material of the transmissive portion 710 may be resin or glass, and the resin may contain a thermoplastic polymer or a photocurable polymer. In addition, the material of the transmissive portion 710 may contain polymethyl methacrylate, polycarbonate or polystyrene, and polyethylene terephthalate. Furthermore, the material of the transmissive portion 710 may be made of a UV-curable resin containing oligomers, more specifically, it may be made of a resin containing polyurethane acrylate oligomers as the main raw material. That is, a resin that mixes urethane acrylate oligomers as synthetic oligomers and polymers as polyacrylates can be used.

[0072] The transmissive portion 710 may have a set 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 from about 0.1 mm to about 10 mm. Preferably, taking into account the realization of the three-dimensional effect and the overall thickness of the lighting device 1000, the thickness h52 of the transmissive portion 710 may be from about 0.1 mm to about 0.25 mm.

[0073] Multiple optical patterns 720 may be disposed on one surface of the transmission portion 710. Specifically, the multiple optical patterns 720 may be disposed on at least one of the lower surface of the transmission portion 710 facing the light-shielding layer 500 and the upper surface opposite the lower surface of the transmission portion 710. The multiple optical patterns 720 may include a biconvex lens shape or a microlens shape having a semi-cylindrical shape. The multiple optical patterns 720 may be integrally formed with the transmission portion 710. Alternatively, the multiple optical patterns 720 may be adhered to the upper or lower surface of the transmission portion 710 by means of an adhesive member 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 photocurable polymer, or may be formed of the same material as the transmission portion 710. The optical patterns 720 may be formed on the upper or lower surface of the transmission portion 710 by a photomask process. The optical patterns 720 may have no difference in refractive index with the transmission portion 710, or may have a refractive index difference of less than 0.2, thereby minimizing light loss due to the refractive index difference. The optical pattern 720 can have a shape capable of refracting incident light. The optical pattern 720 can have a long axis in the direction of the light-emitting surfaces 215 and 225 of the light source portion 200. More specifically, the optical pattern 720 can have a shape extending along a long axis in a direction perpendicular to the light emission direction of the light source portion 200. For example, as shown in the figures, multiple optical patterns 720 can be arranged along a second direction (y-axis direction) on the upper surface of the transmission portion 710 and can have a long axis in a first direction (x-axis direction). More specifically, the optical pattern 720 can be arranged along the second direction according to a stereoscopic image of the illumination device 1000 and can have a long axis in the first direction.

[0074] Multiple optical patterns 720 may have a striped or bar-shaped, sinusoidal, or sawtooth shape with a major axis in the first direction. Multiple optical patterns 720 may be arranged as a combination of lens portions or unit patterns disposed on one or another surface of the transmission portion 710. Furthermore, the transverse cross-sectional shape of the optical pattern 720 in the second direction may have at least one of a hemispherical, semi-elliptical, and polygonal shape. The optical pattern 720 may be set to a predetermined size. For example, the length W7 of the optical pattern 720 in the second direction (y-axis direction) may be about 5 μm or more. More specifically, the length W7 of the optical pattern 720 in the second direction may be from about 5 μm to about 100 μm. More specifically, the length W7 of the optical pattern 720 in the second direction may be from about 10 μm to about 80 μm. Considering the sharpness characteristics of the formed stereoscopic image, the length W7 of the optical pattern 720 in the second direction preferably meets the above-mentioned range.

[0075] The height (z-axis direction) h51 of the optical pattern 720 can be less than the length W7 of the optical pattern 720 in the second direction (y-axis direction). The height h51 of the optical pattern 720 can be less than or equal to approximately 0.5 times the length W7 of the optical pattern 720 in the second direction. More specifically, the height h51 of the optical pattern 720 can be approximately 0.1 to 0.48 times the length W7 of the optical pattern 720 in the second direction. When the height h51 of the optical pattern 720 is greater than the above range, the size of the optical pattern 720 may increase, and the stereoscopic effect may be less pronounced. Furthermore, when the height h51 of the optical pattern 720 is less than the above range, the sharpness characteristics of the stereoscopic image may deteriorate. The spacing P1 between the plurality of optical patterns 720 can be approximately 1 μm to approximately 100 μm. More specifically, the spacing P1 between the plurality of optical patterns 720 can be approximately 1 μm to approximately 10 μm. Considering the sharpness characteristics of the stereoscopic image, the spacing P1 between the plurality of optical patterns 720 preferably meets the above range.

[0076] Therefore, the optical layer 700 can provide a stereoscopic image. Specifically, light emitted from the light source portion 200 can be emitted through the opening portion 510 as a point light source with uniform intensity and incident on the optical layer 700. Subsequently, the light incident on the optical layer 700 can be reflected and / or refracted by the optical pattern 720 to pass through the optical layer 700, and can be configured to have a linear light pattern. The pattern of light passing through the optical layer 700 can form a stereoscopic image in a direction orthogonal to the major axis of the optical pattern 720. Furthermore, the linearity of the light pattern can include a curve with curvature and can be less than or equal to the total number of the first opening 511 and the second opening 512 included in the opening portion 510. The width of the linear light pattern can vary depending on the width of the first opening 511 and the second opening 512. For example, as the width of the first opening 511 and the second opening 512 increases, the width of the light pattern can increase, and as the width of the first opening 511 and the second opening 512 decreases, the width of the light pattern can decrease.

[0077] The light emitted from the optical layer 700 can have the highest luminous intensity in the central region Img1, which corresponds to the opening portion 510 in the vertical direction. Furthermore, the side regions Img2 and Img3, located adjacent to the central region Img1, can have a lower luminous intensity than the central region Img1. The illumination device 1000 can form a stereoscopic image through brightness differences. The optical layer 700 can control the position, size, and shape of the formed stereoscopic image according to the interval h4 between the optical layer 700 and the light-shielding layer 500. For example, a stereoscopic image can be formed in the region Img_a adjacent to the light-shielding layer 500 or in the far region Img_b, depending on the interval h4 between the optical layer 700 and the light-shielding layer 500. Therefore, the illumination device 1000 according to the embodiment can provide various stereoscopic images by controlling the interval h4 between the light-shielding layer 500 and the optical layer 700, the size and shape of the optical pattern 720, and the position and shape of the multiple opening portions.

[0078] Figure 6 and Figure 7 This is another cross-sectional view of the lighting device according to an embodiment. In use Figure 6 and Figure 7 In the description, the description of parts that are the same as or similar to the parts of the above-mentioned lighting device is omitted, and the same reference numerals are assigned to the same and similar parts.

[0079] Reference Figure 6 The lighting device 1000 may include a reflective layer 300. The reflective layer 300 may be disposed between the substrate 100 and the resin layer 410. The reflective layer 300 may have an area smaller than the area of ​​the upper surface of the substrate 100. The reflective layer 300 may be disposed on most of the upper surface of the substrate 100. For example, in the vertical direction, the reflective layer 300 may be disposed in a region corresponding to the opening portion 510, or it may be disposed in a region not corresponding to the opening portion 510. Furthermore, 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 region. Therefore, it is possible to prevent the edge portion of the reflective layer 300 from peeling off.

[0080] The reflective layer 300 may include an opening 301 in which the lower portion of the light source portion 200 is disposed. In the opening 301 of the reflective layer 300, the upper surface of the substrate 100 is exposed, and a portion that engages with the lower portion of the light source portion 200 may be provided. The size of the opening 301 may be the same as or larger than the size of the first light source 210 and the second light source 220 included in the light source portion 200, but is not limited thereto. The thickness of the reflective layer 300 may be less than the thickness of the substrate 100. For example, the thickness of the reflective layer 300 may be set to about 0.5 to about 1 times the thickness of the substrate 100 to reduce transmission loss of incident light. Furthermore, the reflective layer 300 may be formed to have a thickness smaller than that of the light source portion 200. The reflective layer 300 may have a thickness of about 0.2 mm to about 0.4 mm. Through the opening 301 of the reflective layer 300, the lower part of the light source part 200 can be inserted into the reflective layer 300, and the upper part of the light source part 200 can protrude. Each of the light-emitting surface 215 of the first light source 210 and the light-emitting surface 225 of the second light source 220 can be arranged in a direction perpendicular to the upper surface of the reflective layer 300.

[0081] The reflective layer 300 may comprise a metallic or non-metallic material. The metallic material may comprise a metal such as aluminum, silver, or gold. The non-metallic material may comprise a plastic or resin material. The plastic material may be any one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polybiphenyl chloride, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polybutylene terephthalate, polyethylene naphthalate, polyamide, polyacetal, polystyrene, polyamide-imide, polyether-imide, polyetheretherketone, polyimide, polytetrafluoroethylene, liquid crystal polymers, fluoropolymers, copolymers thereof, and mixtures thereof. As a resin material, a reflective material such as a metal oxide (such as TiO2, Al2O3, or SiO2) may be added to a silicon or epoxy resin. The reflective layer 300 may be implemented as a single layer or multiple layers, and such a layered structure can improve light reflection efficiency. According to the embodiment, the reflective layer 300 reflects incident light, thereby increasing the amount of light and causing the light to be emitted in a uniform distribution. Here, when a highly reflective material is coated on the upper surface of the substrate 100, the reflective layer 300 can be omitted. The reflective layer 300 may include multiple reflectors (not shown). The reflectors may be air bubbles or a medium having the same refractive index as air. The reflective layer 300 may reflect light incident from the multiple reflectors or refract light in different directions.

[0082] The reflective layer 300 may include a reflective pattern (not shown). The reflective pattern may have a shape with multiple dots. Multiple reflective patterns may be disposed on the upper surface of the reflective layer 300. For example, the multiple reflective patterns may be configured to protrude from the upper surface of the reflective layer 300. The multiple reflective patterns may be spaced apart from the light source portion 200 and positioned in the emission direction of light emitted from the light source portion 200. The multiple reflective patterns may be formed on the reflective layer 300 by printing. The multiple reflective patterns may include reflective ink. The multiple reflective patterns may be printed on a material containing any one of TiO2, CaCO3, BaSO4, Al2O3, silicon, and PS. The planar shape of each of the multiple reflective patterns may be selected from circles, ellipses, and polygons. Furthermore, each of the multiple reflective patterns may have a hemispherical or polygonal lateral cross-section. The material of the multiple reflective patterns may be white. The dot pattern density of the multiple reflective patterns may increase with increasing distance from the light source portion 200. Specifically, the density of the reflective pattern per unit area can increase with increasing distance from each of the luminescent surfaces 215 of the first light source 210 and 225 of the second light source 220. For example, the density of the reflective pattern per unit area can increase from the luminescent surface 215 of the first light source 210 toward the first side surface S1, and can increase from the luminescent surface 225 of the second light source 220 toward the second side surface S2. The size of the multiple reflective patterns can change with increasing distance from each of the luminescent surfaces 215 of the first light source 210 and 225 of the second light source 220. Specifically, the horizontal width of the multiple reflective patterns can increase with increasing distance from the luminescent surfaces 215 and 225 of the light source portion 200. For example, the size of the reflective pattern increases from the luminescent surface 215 of the first light source 210 toward the first side surface S1 along the direction of the luminescent surface 225 of the second light source 220. It can increase in the direction of the second side surface S2. The multiple reflective patterns can also be disposed between the light source portion 200 and the groove 450 of the resin layer 410. In detail, the reflective patterns can also be disposed between the first light source 210 and the recess 450, and between the second light source 220 and the recess 450. Therefore, the lighting device 1000 can minimize light loss by re-reflecting the light provided by reflection between the light source portion 200 and the recess 450. That is, since multiple reflective patterns are disposed on the path of light emitted from the light source portion 200 and / or on the path of light emitted from the light source portion 200 and reflected in other components, light reflectivity can be increased, light loss can be reduced, and the brightness of the point light source emitted through the opening portion 510 can be increased.

[0083] Reference Figure 7The reflective layer 300 can be disposed on a portion of the substrate 100. For example, the reflective layer 300 can be disposed on the emission path of the light source portion 200. Specifically, the reflective layer 300 can be 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 can be disposed in a region corresponding to the opening portion 510 in the vertical direction. In this case, the reflective layer 300 can be provided with a predetermined horizontal width. For example, the horizontal width of the reflective layer 300 can be approximately 1 to approximately 1.5 times the first length W5 and the second length W6 of the opening portion 510. Therefore, the reflective layer 300 is disposed in the smallest region on the path of light emitted from the light source portion 200 to improve light reflection and prevent light loss. Therefore, the brightness of the point light source emitted through the opening portion 510 can be improved, and hot spots can be prevented from forming on the opening portion 510 by the light source portion 200.

[0084] Figure 8 and Figure 9 This is another cross-sectional view of the lighting device according to an embodiment. In use Figure 8 and Figure 9 In the description, the description of parts that are the same as or similar to the parts of the above-mentioned lighting device is omitted, and the same reference numerals are assigned to the same and similar parts.

[0085] Reference Figure 8 The lighting device 1000 according to this embodiment may further include a light-transmitting layer 550. The light-transmitting layer 550 may be disposed between the resin layer 410 and the light-shielding layer 500. The light-transmitting layer 550 may be configured to contact the upper surface of the resin layer 410. Furthermore, the light-transmitting layer 550 may be configured to contact the lower surface of the light-shielding layer 500. The light-transmitting layer 550 is configured as a wavelength conversion layer and may contain a wavelength conversion material. For example, the light-transmitting layer 550 may contain at least one wavelength conversion material selected from phosphors and quantum dots. For example, the light-transmitting layer 550 may contain a phosphor and may emit light such as white, blue, yellow, green, or red. The phosphor may contain at least one or two types selected from green phosphors, red phosphors, amber phosphors, yellow phosphors, white phosphors, and blue phosphors. The phosphor may contain at least one type selected from YAG-based, TAG-based, silicate-based, sulfide-based, and nitride-based phosphors.

[0086] The light-transmitting layer 550 can absorb a portion of the first light emitted from the light source portion 200 and convert it into second light having a wavelength band different from that of the first light. Specifically, the light-transmitting layer 550 can absorb a portion of the first light emitted from the light source portion 200 and emitted through the upper surface of the resin layer 410, so that it can be converted into second light.

[0087] The light-transmitting layer 550 can have a set thickness. Specifically, the light-transmitting layer 550 can have a thickness smaller than that of the resin layer 410. For example, the thickness of the light-transmitting layer 550 can be from about 50 μm to about 500 μm. More specifically, the thickness of the light-transmitting layer 550 can be from about 80 μm to about 400 μm. More specifically, the thickness of the light-transmitting layer 550 can be from about 100 μm to about 300 μm. When the thickness of the light-transmitting layer 550 is less than about 50 μm, it may be difficult to convert the first light emitted from the light source portion 200 into second light. Furthermore, when the thickness of the light-transmitting layer 550 is less than about 50 μm, it may be difficult to clearly identify the color of the light-transmitting layer 550 when the lighting device 1000 is turned off, and the internal configuration of the lighting device 1000 may not be visually identifiable from the outside. Conversely, when the thickness of the light-transmitting layer 550 exceeds about 500 μm, the first light emitted from the light source portion 200 can be effectively converted into second light, but the thickness of the light-transmitting layer 550 may be relatively thick. Therefore, the overall thickness of the lighting device 1000 may increase, potentially reducing its flexibility, and light emitted from the light source portion 200 may be lost as it passes through the light-transmitting layer 550, thus reducing overall brightness. Consequently, the brightness and sharpness of the stereoscopic image formed through the optical layer 700 may decrease. Alternatively, the light-transmitting layer 550 may function as a blind sheet. Specifically, the light-transmitting layer 550 may prevent light emitted from the light source portion 200 from being concentrated, for example, it may perform a hotspot prevention function.

[0088] In this case, the light-transmitting layer 550 may comprise a light-transmitting material. For example, the light-transmitting layer 550 may comprise at least one of polyethylene terephthalate (PET), polystyrene (PS), polyimide (PI), polyethylene naphthalate (PEN), and polycarbonate (PC). The area of ​​the light-transmitting layer 550 other than the area where the transmission control pattern (not shown), which will be described later, is formed may be a light-transmitting layer.

[0089] The light-transmitting layer 550 can have a set thickness. For example, the thickness of the light-transmitting layer 550 can be from about 50 μm to about 300 μm. More specifically, the thickness of the light-transmitting layer 550 can be from about 80 μm to about 250 μm. More specifically, the thickness of the light-transmitting layer 550 can be from about 100 μm to about 200 μm. When the thickness of the light-transmitting layer 550 is less than about 50 μm, the light-transmitting layer 550 may have difficulty effectively blocking light incident from the bottom. That is, since the light-transmitting layer 550 does not have sufficient thickness for hot spot control, hot spots may form. Furthermore, when the thickness of the light-transmitting layer 550 exceeds about 300 μm, it is possible to effectively control the formation of hot spots from the light source portion 200, but when the light emitted from the light source portion 200 passes through the light-transmitting layer 550, it is lost, and the overall brightness may decrease. Therefore, the thickness of the light-transmitting layer 550 preferably meets the above-mentioned range.

[0090] The light-transmitting layer 550 may include a plurality of transmission control patterns (not shown), which are spaced apart from each other in a first direction and a second direction. The plurality of transmission control patterns may be formed on at least one of the upper and lower surfaces of the light-transmitting 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 contain ink. For example, the transmission control patterns may be printed with a material containing any one of TiO2, CaCO3, BaSO4, Al2O3, silicon, and PS. The transmission control patterns may be white with excellent reflective properties. Furthermore, the transmission control patterns may be provided in the form of 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-shielding layer 500, the transmission control patterns may be provided in the form of grooves in the direction from the upper surface to the lower surface of the optical layer 700. The plurality of transmission control patterns may be provided in the region corresponding to the opening portion 510. The plurality of transmission control patterns may be formed to have a set thickness, and the transmission of light can be controlled by blocking or partially transmitting light incident on the transmission control patterns.

[0091] The lighting device 1000 according to the embodiment may include a light-transmitting layer 550 that performs at least one of wavelength conversion and a blind function. Therefore, the lighting device 1000 can change the light emitted from the light source portion 200 to a set color and can improve the brightness uniformity characteristics of the light emitted through the opening portion 510.

[0092] Reference Figure 9 A light-transmitting layer 550 can be disposed between the resin layer 410 and the light-shielding layer 500. In this case, the light-transmitting layer 550 can directly contact the light-shielding layer 500. Furthermore, the light-transmitting layer 550 can be spaced apart from the resin layer 410 in the vertical direction (z-axis direction). Therefore, a second air layer 820 can be formed between the resin layer 410 and the light-transmitting layer 550. The lighting device 1000 according to the embodiment can more effectively control the light hotspot by disposing the second air layer 820 between the resin layer 410 and the light-transmitting layer 550. Furthermore, the refraction angle and travel path of light can be controlled by the second air layer 820, thereby enabling more effective formation of a stereoscopic image.

[0093] Figure 10 This is another cross-sectional view of the lighting device according to an embodiment. In use Figure 10 In the description, the description of parts that are the same as or similar to the parts of the above-mentioned lighting device is omitted, and the same reference numerals are assigned to the same and similar parts.

[0094] Reference Figure 10An optical layer 700 can be disposed on the illumination module. The optical layer 700 can also be disposed on the light-shielding layer 500. The optical layer 700 can form a stereoscopic image by reflecting and / or refracting light incident from the illumination module. The optical layer 700 can be spaced from the light-shielding layer 500 by a predetermined distance h4 in the vertical direction (z-axis direction). The distance h4 can be a distance from which light emitted through the opening portion 510 of the light-shielding layer 500 can be diffused. Furthermore, the distance h4 can be a distance from which the size of the stereoscopic image formed by the optical layer 700 can be adjusted.

[0095] In the lighting device 1000 according to the embodiment, the interval h4 between the optical layer 700 and the light-shielding layer 500 can be varied. For example, the optical layer 700 can be configured to be tilted relative to the upper surface of the resin layer 410 at a predetermined tilt angle θ. In this case, the tilt angle θ can be an acute angle less than 90 degrees. Therefore, the interval h4 between the optical layer 700 and the light-shielding layer 500 can gradually increase or decrease in the horizontal direction, and the first air layer 800 disposed between the two components 500 and 700 can have a vertical height variation depending on the tilt angle of the optical layer 700. Therefore, the lighting device 1000 according to the embodiment can achieve various three-dimensional effects as the interval h4 changes.

[0096] Figure 11 This is another cross-sectional view of the lighting device according to an embodiment. In use Figure 11 In the description, the description of parts that are the same as or similar to the parts of the above-mentioned lighting device is omitted, and the same reference numerals are assigned to the same and similar parts.

[0097] Reference Figure 11 According to the embodiment, the light source portion 200 can be disposed on the substrate 100. The light source portion 200 can be disposed on the upper surface of the substrate 100 facing the light-shielding layer 500. The light source portion 200 is a device having an LED and may include a package encapsulating a light-emitting chip. The light-emitting chip can emit at least one of visible light such as blue, red, green, and yellow, ultraviolet (UV) light, and infrared light, and the light source portion 200 can emit at least one of ultraviolet or infrared light, such as white light, blue light, red light, yellow light, and green light. The light source portion 200 can be a top-view type with the light-emitting surfaces 215 and 225 facing upwards. That is, the optical axis OA of the light source portion 200 can be perpendicular to the upper surface of the substrate 100.

[0098] The light source section 200 is an LED chip that emits light from five sides and can be disposed on the substrate 100 in a flip-chip configuration. The light source section 200 can emit at least one of visible light, such as blue, red, green, and yellow, ultraviolet (UV) light, and infrared light. The light source section 200 may include multiple light-emitting surfaces and can emit the strongest light towards the upper surfaces 215 and 225 facing the light-shielding layer 500. The light source section 200 can be a horizontal chip or a vertical chip. In a horizontal chip, two different electrodes can be disposed in the horizontal direction, and in a vertical chip, two different electrodes can be disposed in the vertical direction. Since, in the case of a horizontal or vertical chip, the light source section 200 is connected to another chip or wiring pattern using wires, the thickness of the module may increase due to the height of the wires, and pad space may be required for bonding the wires.

[0099] The light source portion 200 may include a plurality of light sources. For example, the light source portion 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 may be configured to be spaced apart from each other in the first region A1 along a first direction and / or a second direction, and the plurality of second light sources 220 may be configured to be spaced apart from each other in the second region A2 along the first direction and / or a second direction.

[0100] The light source portion 200 can emit light toward the upper surface of the resin layer 410. For example, a plurality of first light sources 210 can emit light toward the upper surface of a first region A1 of the resin layer 410, and a plurality of second light sources 220 can emit light toward the upper surface of a second region A2 of the resin layer 410. Thereafter, light emitted from the plurality of first light sources 210 can be guided by the resin layer 410 and emitted through a first opening 511, and light emitted from the plurality of second light sources 220 can be guided by the resin layer 410 and emitted through a second opening 512. Furthermore, although not shown in the figures, the reflective layer 300 (see...) Figure 6 The reflective layer 300 can also be disposed between the substrate 100 and the resin layer 410. The reflective layer 300 can be disposed on most of the upper surface of the substrate 100. The reflective layer 300 may include an opening in which the lower portion of the light source portion 200 is disposed. The upper surface of the substrate 100 can be exposed in the opening of the reflective layer, and a portion that engages with the lower portion of the light source portion 200 can be provided. The size of the opening in the reflective layer 300 may be the same as or larger than the size of the first light source 210 and the second light source 220 included in the light source portion 200, but is not limited thereto.

[0101] Therefore, light emitted from the light source portion 200 can be emitted as a point light source with uniform intensity through the opening portion 510. Furthermore, light can be incident on the optical layer 700 to form a linear light pattern, such as a stereoscopic image.

[0102] Figures 12 to 16 This is a diagram used to explain the various openings in the light-shielding layer of the lighting device according to an embodiment.

[0103] Reference Figure 12 According to an embodiment, the light-shielding layer 500 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 equal to or greater than 3). The openings 510 may include a first opening 511 and a second opening 512. The first opening 511 may be disposed in a region corresponding to a first region A1 of the resin layer 410. A plurality of first openings 511 may be disposed in the first region A1. The plurality of first openings 511 may be arranged regularly. For example, the plurality of first openings 511 may be spaced apart from each other in a first direction (x-axis direction). The plurality of first openings 511 may be spaced apart from each other at equal intervals. Furthermore, the plurality of first openings 511 may have the same shape and the same length in the first and second directions (x-axis and y-axis directions). That is, the plurality of first openings 511 may regularly have the same shape and the same length in the first and second directions.

[0104] Multiple first openings 511 can be disposed in the region between the first side surface S1 and the first light source 210. Multiple first openings 511 can be disposed in the region corresponding to the first side surface S1. Multiple first openings 511 can be disposed in the region that does not perpendicularly overlap with the first light source 210. The number of multiple first openings 511 can be greater than the number of multiple first light sources 210.

[0105] The second opening 512 can be disposed in the region corresponding to the second region A2 of the resin layer 410. A plurality of second openings 512 can be disposed in the second region A2. The plurality of second openings 512 can be arranged regularly. For example, the plurality of second openings 512 can be spaced apart from each other in the first direction (x-axis direction). The plurality of second openings 512 can be spaced apart from each other at equal intervals. Furthermore, the plurality of second openings 512 can have the same shape and the same length in the first and second directions (x-axis and y-axis directions). That is, the plurality of second openings 512 can regularly have the same shape and the same length in the first and second directions. The second opening 512 can have the same shape as the first opening 511. The second opening 512 can have the same length as the first opening 511 in the first and second directions (x-axis and y-axis directions). That is, the second opening 512 can be configured to have the same shape and size as the first opening 511.

[0106] Multiple second openings 512 can be disposed in the region between the second side surface S2 and the second light source 220. Multiple second openings 512 can be disposed in the region corresponding to the second side surface S2. Multiple second openings 512 can be disposed in the region that does not perpendicularly overlap with the second light source 220. The number of multiple second openings 512 can be greater than the number of multiple second light sources 220.

[0107] A plurality of second openings 512 can be disposed in regions corresponding to a plurality of first openings 511. For example, a plurality of second openings 512 can be disposed in regions corresponding to a plurality of first openings 511 in a second direction (y-axis direction). That is, the first openings 511 and second openings 512 disposed in regions corresponding to each other can be disposed facing each other in a second direction. The number of the plurality of second openings 512 can be the same as the number of the plurality of first openings 511. However, the embodiments are not limited thereto, and the number of second openings 512 can be greater than or less than the number of first openings 511 depending on the shape of the stereoscopic image to be achieved.

[0108] Therefore, 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 stereoscopic image. Specifically, light can be 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 curves. In this case, since the first opening 511 and the second opening 512 have the same shape and size (length in both the first and second directions), the linear shape of the light pattern formed through each of the first opening 511 and the second opening 512 can have the same length or width in the first direction.

[0109] The first opening 511 and the second opening 512 can be configured to face each other in a second direction. Therefore, the linear light pattern formed by each of the first opening 511 and the second opening 512 can provide a stereoscopic image that meets each other in the central region of the light-shielding layer 500.

[0110] Reference Figure 13 A plurality of first openings 511 can be disposed in the region corresponding to the first region A1 of the resin layer 410, and a plurality of second openings 512 can be formed in the region corresponding to the second region A2 of the resin layer 410. In this case, each of the plurality of first openings 511 and the plurality of second openings 512 can be arranged regularly. For example, the plurality of first openings 511 can regularly have the same shape and the same length in the first and second directions. Furthermore, the plurality of second openings 512 can regularly have the same shape and the same length in the first and second directions. The second openings 512 can have the same shape and size as the first openings 511.

[0111] A plurality of second openings 512 can be disposed in regions corresponding to areas spaced apart from each other by a plurality of first openings 511. More specifically, the plurality of second openings 512 can be disposed in regions corresponding to areas between a plurality of first openings 511 spaced apart in a first direction (x-axis direction) and regions corresponding in a second direction (y-axis direction). That is, the first openings 511 and the second openings 512 may not face each other in the second direction and may be configured as a sawtooth shape. In this case, the number of the plurality of second openings 512 may be less than the number of the plurality of first openings 511. However, the embodiments are not limited thereto, and the number of second openings 512 may be the same as the number of first openings 511, depending on the shape of the stereoscopic image to be achieved.

[0112] Therefore, 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 stereoscopic image. Specifically, light can be 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 curves. In this case, the first opening 511 and the second opening 512 can have the same shape and size (length in both the first and second directions). Therefore, the linear shape of the light pattern formed through each of 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 can be configured as a zigzag shape, not facing each other in the second direction. Therefore, the light pattern formed through each of the first opening 511 and the second opening 512 can provide a zigzag stereoscopic image.

[0113] Reference Figure 14A plurality of first openings 511 can be disposed in the region corresponding to the first region A1 of the resin layer 410, and a plurality of second openings 512 can be formed in the region corresponding to the second region A2 of the resin layer 410. In this case, each of the plurality of first openings 511 and the plurality of second openings 512 can be arranged regularly. For example, the plurality of first openings 511 can regularly have the same shape and the same length in the first and second directions. Furthermore, the plurality of second openings 512 can regularly have the same shape and the same length in the first and second directions.

[0114] A plurality of second openings 512 can be disposed in regions corresponding to a plurality of first openings 511. For example, a plurality of second openings 512 can be disposed in regions corresponding to a plurality of first openings 511 in a second direction (y-axis direction). That is, the first openings 511 and second openings 512 disposed in regions corresponding to each other can be disposed facing each other in a second direction. The number of the plurality of second openings 512 can be the same as the number of the plurality of first openings 511. However, the embodiments are not limited thereto, and the number of second openings 512 can be greater than or less than the number of first openings 511 depending on the shape of the stereoscopic image to be achieved.

[0115] The second opening 512 can have a shape different from that of the first opening 511. For example, as Figure 14 As shown, the first opening 511 can have a rectangular shape, and the second opening 512 can have a circular shape. Furthermore, the second opening 512 can have a smaller size than the first opening 511. For example, the second opening 512 can have smaller lengths W5 and W6 in the first and second directions (x-axis and y-axis) than the first opening 511.

[0116] Therefore, 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 stereoscopic image. Specifically, light can be 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 curves. In this case, since the first opening 511 and the second opening 512 have different shapes and sizes (lengths in the first and second directions), the linear shape of the light pattern formed through each of the first opening 511 and the second opening 512 can have different lengths or widths in the first direction.

[0117] The first opening 511 and the second opening 512 can be configured to face each other in a second direction. Therefore, the linear light pattern formed by each of the first opening 511 and the second opening 512 can provide a stereoscopic image that meets each other in the central region of the light-shielding layer 500.

[0118] Reference Figure 15 A plurality of first openings 511 can be disposed in the region corresponding to the first region A1 of the resin layer 410, and a plurality of second openings 512 can be disposed in the region corresponding to the second region A2 of the resin layer 410. In this case, each of the plurality of first openings 511 and the plurality of second openings 512 can be arranged regularly. For example, the plurality of first openings 511 can regularly have the same shape and the same length in the first and second directions. Furthermore, the plurality of second openings 512 can regularly have the same shape and the same length in the first and second directions.

[0119] A plurality of second openings 512 can be disposed in regions corresponding to areas between a plurality of first openings 511 spaced apart from each other. Specifically, the plurality of second openings 512 can be disposed in regions corresponding to areas between a plurality of first openings 511 spaced apart along a first direction (x-axis direction) and a second direction (y-axis direction). That is, the first openings 511 and the second openings 512 may not face each other in the second direction and may be configured as a sawtooth shape. In this case, the number of the plurality of second openings 512 may be less than the number of the plurality of first openings 511. However, the embodiments are not limited thereto, and the number of second openings 512 may be the same as the number of first openings 511 depending on the shape of the stereoscopic image to be achieved. The second openings 512 may have a shape different from the shape of the first openings 511. For example, as Figure 15 As shown, the first opening 511 can be rectangular, and the second opening 512 can be circular. Furthermore, the second opening 512 can have a smaller size than the first opening 511. For example, the second opening 512 can have smaller lengths W5 and W6 in the first and second directions (x-axis and y-axis) than the first opening 511.

[0120] Therefore, 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 stereoscopic image. Specifically, light can be 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 curves. In this case, since the first opening 511 and the second opening 512 have different shapes and sizes (lengths in the first and second directions), the linear shape of the light pattern formed through each of the first opening 511 and the second opening 512 can have different lengths or widths in the first direction.

[0121] The first opening 511 and the second opening 512 can be configured to be serrated, rather than facing each other in the second direction. Therefore, the light pattern formed by each of the first opening 511 and the second opening 512 can provide a serrated stereoscopic image.

[0122] Reference Figure 16 Multiple first openings 511 can be disposed in the region corresponding to the first region A1 of the resin layer 410, and multiple second openings 512 can be disposed in the region corresponding to the second region A2 of the resin layer 410. In this case, each of the multiple first openings 511 and multiple second openings 512 can be arranged regularly. Specifically, the multiple first openings 511 can have the same shape as each other. The length W5 of the multiple first openings 511 in the first direction can be changed regularly. For example, the length W5 of the first opening 511 in the first direction can gradually increase from the first light source 210 disposed at the first one (leftmost in the figure) to the first light source disposed at the last one (rightmost in the figure).

[0123] Multiple second openings 512 may have the same shape. The length W6 of the multiple second openings 512 in the second direction may vary regularly. For example, the length W6 of the second openings 512 in the second direction may gradually increase from the first second light source (leftmost in the figure) to the last second light source (rightmost in the figure) among the multiple second light sources 220.

[0124] At least one of the plurality of first openings 511 may have a length in the first direction (x-axis direction) greater than the length in the first direction of at least one of the plurality of second openings 512. Furthermore, at least one of the plurality of second openings 512 may have a length in the second direction (y-axis direction) greater than the length in the second direction (y-axis direction) of at least one of the plurality of first openings 511. The plurality of second openings 512 may be disposed in regions corresponding to the plurality of first openings 511. For example, the plurality of second openings 512 may be disposed in regions corresponding to the plurality of first openings 511 in the second direction (y-axis direction). That is, the first openings 511 and second openings 512 disposed in corresponding regions may be disposed facing each other in the second direction. Furthermore, although not shown in the figures, the plurality of second openings 512 may be disposed in regions corresponding to regions between the plurality of first openings 511 spaced apart in the first and second directions. That is, the plurality of first openings 511 and the plurality of second openings 512 may be arranged in a zigzag pattern.

[0125] The number of the plurality of second openings 512 can be the same as the number of the plurality of first openings 511. However, the embodiments are not limited thereto, and the number of second openings 512 may be greater than or less than the number of first openings 511, depending on the shape of the stereoscopic image to be achieved.

[0126] Therefore, 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 stereoscopic image. Specifically, light can be 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 curves. In this case, the plurality of first openings 511 may have different lengths W5 in a first direction, and the plurality of second openings 512 may have different lengths W6 in a second direction. Therefore, the linear shape of the light pattern formed through each of the first openings 511 and the second opening 512 can have different luminous intensities, lengths or widths in the first direction, etc.

[0127] The illumination device 1000 according to an embodiment can form a linear stereoscopic image by using a point light source of uniform intensity emitted via each of the first opening 511 and the second opening 512. In this case, the linear light pattern can include curves and can have a shape corresponding to the shape, size, and position of the first opening 511 and the second opening 512. The number of lines can be less than or equal to the sum of the number of the first opening 511 and the second opening 512. Specifically, light emitted from each of the first opening 511 and the second opening 512 can pass through the optical layer 700 to form a line. In this case, the linear light patterns formed according to the shape, size, and position of the first opening 511 and the second opening 512 can overlap each other in a region. Therefore, when a person visually recognizes the linear light pattern from the outside of the illumination device 1000, the number of lines can be less than the number of openings.

[0128] According to the embodiment, the resin layer 410 may include a groove 450 formed between the first region A1 and the second region A2. Therefore, when the first light source 210 and the second light source 220 emit light simultaneously, light emitted from each of the first light source 210 and the second light source 220 can be prevented or minimized from propagating to the second region A2 and the first region A1, respectively. Furthermore, when light is emitted from one of the first light source 210 and the second light source 220, light propagation to areas of the resin layer 410 that do not correspond to the light source can be prevented or minimized. Therefore, the illumination device 1000 according to the embodiment can prevent the mixing of light emitted from each of the first light source 210 and the second light source 220, allowing the defined stereoscopic image (e.g., a curved stereoscopic image) to provide a clearer definition.

[0129] Figure 17a and Figures 17b to 20a and Figure 20b This is a diagram used to explain a three-dimensional image formed based on the various opening shapes in the lighting device according to the embodiment.

[0130] Reference Figure 17a and Figure 17bThe light-shielding layer 500 may include an opening portion 510, which includes a plurality of openings. The plurality of openings may include a plurality of first openings 511 disposed in a region corresponding to a first region A1 of the resin layer 410 and a plurality of second openings 512 disposed in a region corresponding to a second region A2 of the resin layer 410. The plurality of first openings 511 may include 1-1 openings 511a to 1-6 openings 511f spaced apart from each other in a first direction. The 1-1 openings 511a to 1-6 openings 511f may regularly have the same shape and the same length in both the first and second directions. The plurality of second openings 512 may include 2-1 openings 512a to 2-5 openings 512e spaced apart from each other in the first direction. The 2-1 openings 512a to 2-5 openings 512e may regularly have the same shape and the same length in both the first and second directions.

[0131] Multiple second openings 512 can be disposed in regions corresponding to areas between multiple first openings 511 spaced apart from each other. Specifically, the multiple second openings 512 can be disposed in regions corresponding to areas between multiple first openings 511 spaced apart in a first direction (x-axis direction) and a second direction (y-axis direction). That is, the first openings 511 and second openings 512 may not face each other in the second direction and can be configured as a sawtooth shape. Therefore, the pattern of light emitted through each of the first openings 511 and second openings 512 and passing through the optical layer 700 can have a shape where linear stereoscopic images intersect in a sawtooth manner. In this case, the linearity of the light pattern can include curves. Specifically, the light emitted through the first opening 511 can have a linearity extending from a first side surface S1 adjacent to the first opening 511 towards a second side surface S2. In this case, the width of the region adjacent to the first side surface S1 in the first direction in the light pattern can be greater than the width of the region adjacent to the second side surface S2 in the first direction. That is, the luminous intensity of the light pattern can decrease as it moves away from the first opening 511. Therefore, when the light pattern is observed from the outside, it can be identified that the width in the first direction gradually decreases from the first side surface S1 to the second side surface S2.

[0132] The light emitted through the second opening 512 can have a linear shape extending from the second side surface S2 adjacent to the second opening 512 along the direction of the first side surface S1. In this case, in the light pattern, the width in the first direction of the region adjacent to the second side surface S2 can be greater than the width in the first direction of the region adjacent to the first side surface S1. That is, the light intensity of the light pattern can decrease as it moves away from the second opening 512. Therefore, when the light pattern is observed from the outside, it can be discerned that the width in the first direction gradually decreases from the second side surface S2 to the first side surface S1.

[0133] Reference Figure 18a and Figure 18b The light-shielding layer 500 may include an opening portion 510, which includes a plurality of openings. The plurality of openings may include a plurality of first openings 511 disposed in a region corresponding to a first region A1 of the resin layer 410, and a plurality of second openings 512 disposed in a region corresponding to a second region A2 of the resin layer 420. The plurality of first openings 511 may include 1-1 openings 511a to 1-6 openings 511f spaced apart from each other in a first direction. The 1-1 openings 511a to 1-6 openings 511f may regularly have the same shape and the same length in both the first and second directions. The plurality of second openings 512 may include 2-1 openings 512a to 2-5 openings 512e spaced apart from each other in a direction (diagonal direction) between the first and second directions. Therefore, a portion of the plurality of second openings 512 may be disposed in the region corresponding to the first region A1, and the remainder may be disposed in the region corresponding to the second region A2. The 2-1 openings 512a to 2-5 openings 512e may regularly have the same shape and the same length in both the first and second directions.

[0134] A plurality of second openings 512 can be disposed in regions corresponding to areas between a plurality of first openings 511 spaced apart from each other. Specifically, the plurality of second openings 512 can be disposed in regions corresponding to areas between a plurality of first openings 511 spaced apart along a first direction (x-axis direction) and a second direction (y-axis direction). That is, the first openings 511 and second openings 512 may not face each other in the second direction and may be configured as a sawtooth shape. The distance between the plurality of second openings 512 and the first side surface S1 can vary. Specifically, a virtual straight line L1 connecting the centers of the plurality of first openings 511 may be included. The virtual straight line L1 may extend in the first direction. In this case, the interval (e.g., length in the second direction) between each of the plurality of second openings 512 and the virtual straight line L1 can be different from each other. For example, the length in the second direction between the virtual straight line L1 and the second openings 512 can decrease from the first 2-1 opening 512a to the last 2-5 opening 512e.

[0135] Therefore, the pattern of light emitted through each of the first opening 511 and the second opening 512 and passing through the optical layer 700 can have a shape in which linear stereoscopic images intersect in a zigzag manner. In this case, the line shape of the light pattern can include a curve. Specifically, the light emitted through the first opening 511 can have a line shape extending from the first side surface S1 adjacent to the first opening 511 towards the second side surface S2. Furthermore, since the second opening 512 is formed at a different distance from the virtual straight line L1, the light emitted through the second opening 512 can have a line shape with different curvature and bending shape. At this time, since the size of the second opening 512 is smaller than the size of the first opening 511, the width (length in the first direction) of the light pattern formed through the second opening 512 can be smaller than the width (length in the first direction) of the light pattern formed through the first opening 511.

[0136] Reference Figure 19a and Figure 19b The light-shielding layer 500 may include openings 510, which may include a plurality of openings. The plurality of openings may include a plurality of first openings 511 disposed in a region corresponding to a first region A1 of the resin layer 410 and a plurality of second openings 512 disposed in a region corresponding to a second region A2 of the resin layer 410. The plurality of first openings 511 may be regularly arranged in the first region A1, and the plurality of second openings 512 may be regularly arranged in the second region A2. The plurality of openings may also include a plurality of third openings 513 disposed in a region between the first openings 511 and the second openings 512. The third openings 513 may be disposed in a central region (based on a second direction) of the light-shielding layer 500. A portion of the third opening 513 may be disposed in a region corresponding to at least one of the first region A1 and the second region A2. The third opening 513 may be disposed in a region overlapping with a groove 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 may be disposed in regions corresponding to each other along the second direction (y-axis direction). That is, the first opening 511 and the second opening 512 can be arranged to face each other in the second direction. A plurality of third openings 513 can be arranged in regions corresponding to the areas between the plurality of spaced-apart first openings 511 and the areas between the plurality of second openings 512, respectively. More specifically, the plurality of third openings 513 can be arranged in the areas between the plurality of spaced-apart first openings 511 along the first direction (x-axis direction) and in the areas corresponding to the areas between the plurality of second openings 512 along the second direction (y-axis direction). In other words, the first openings 511 and third openings 513, and the second openings 512 and third openings 513 can be arranged in a zigzag pattern, rather than facing each other in the second direction.

[0137] Therefore, the pattern of light emitted through each of the first opening 511 and the second opening 512 and passing through the optical layer 700 can form a linear stereoscopic image including curves. In this case, the first opening 511 and the second opening 512 can be configured to face each other in a second direction. Thus, the linear light pattern formed through each of the first opening 511 and the second opening 512 can provide a stereoscopic image that meets each other in the central region of the light-shielding layer 500. Specifically, the stereoscopic image can have a concave shape toward the central region of the light-shielding layer 500. Furthermore, the stereoscopic image can have a shape in which the luminous intensity decreases toward the central region of the light-shielding layer 500.

[0138] A portion of the light emitted from the light source portion 200 can be transmitted to the optical layer 700 through the third opening 513. Thereafter, the light can pass through the optical layer 700 to form a linear stereoscopic image including curves. In this case, the linear light pattern formed through the third opening 513 can have a shape extending along the direction of the first side surface S1 and the second side surface S2 of the resin layer 410 in the central region of the light-shielding layer 500. Furthermore, the light pattern can have a shape symmetrical with respect to the central region of the light-shielding layer 500, forming a stereoscopic image with a raised shape in the central region. Additionally, the stereoscopic image can have a form in which the luminous intensity decreases with increasing distance from the central region of the light-shielding layer 500.

[0139] Reference Figure 20a and Figure 20b The light-shielding layer 500 may include an opening portion 510, which includes a plurality of openings. The plurality of openings may include a plurality of first openings 511 disposed in a region corresponding to a first region A1 of the resin layer 410. The plurality of first openings 511 may be regularly arranged in the first region A1. At least one of the plurality of first openings 511 may include a plurality of unit openings. For example, a 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 a first direction. The second unit opening 5112 may be disposed between the first unit opening 5111 and the third unit opening 5113, and may connect the two unit openings 5111 and 5113. Therefore, the first unit opening 5111, the second unit opening 5112, and the third unit opening 5113 may be connected to each other.

[0140] The first unit opening 5111, the second unit opening 5112, and the third unit opening 5113 can have predetermined dimensions. For example, each of the first unit opening 5111, the second unit opening 5112, and the third unit opening 5113 can have the same length in a first direction. Furthermore, the lengths of each of the first unit opening 5111, the second unit opening 5112, and the third unit opening 5113 in a second direction can be different from each other. Specifically, the second unit opening 5112 can have a larger length in the second direction than the first unit opening 5111, and the third unit opening 5113 can have a longer length in the second direction than the second unit opening 5112.

[0141] Therefore, the pattern of light emitted through each of the first unit opening 5111, the second unit opening 5112, and the third unit opening 5113 and passing through the optical layer 700 can form a three-dimensional image with a linear shape. In this case, the linear shape of the light pattern can include a curve. Specifically, the light emitted through each of the first unit opening 5111, the second unit opening 5112, and the third unit opening 5113 can have a linear shape extending from the first side surface S1 adjacent to the first opening 511 towards the second side surface S2. Furthermore, the luminous intensity of the light pattern can decrease as it moves away from the first opening 511. Therefore, when the light pattern is observed from the outside, it can be recognized that the width in the first direction gradually decreases from the first side surface S1 to the second side surface S2. In addition, in the illumination device 1000, the lengths of the first unit opening 5111, the second unit opening 5112, and the third unit opening 5113 in the second direction can be different. Therefore, the light pattern of the first unit opening 5111, which has a relatively short length in the second direction, can be shorter than the length of the third unit opening 5113, which has a relatively long length in the second direction.

[0142] Reference Figure 20a and Figure 20b The opening portion 510 may be provided only in the region corresponding to the first region A1. That is, the individual opening portion may not be formed in the central region of the second region A2 and the light-shielding layer 500. In this case, the second light source 220 provided in the second region A2 may not emit light. Alternatively, although not shown in the figures, the second light source 220 may be omitted.

[0143] The illumination device 1000 according to an embodiment can provide a stereoscopic image with a linear shape using a point light source of uniform intensity emitted through an opening 510 formed in a light-shielding layer 500. Specifically, the illumination device 1000 can provide stereoscopic images with various shapes by controlling the shape, size, position, etc., of the plurality of openings included in the opening 510. The illumination device 1000 includes a resin layer 410 for guiding light emitted from the light source portion 200, and the resin layer 410 may include a groove 450 extending in one direction between the plurality of light sources. Therefore, the illumination device 1000 can minimize light loss and prevent or minimize the movement of light emitted from a set area to another area, thereby providing a clearer stereoscopic image.

[0144] Figures 21 to 23 This is a diagram illustrating an example of a lamp, including a lighting device according to an embodiment, applied to a vehicle. Specifically, Figure 21 This is a top view of a vehicle equipped with lights. Figure 22 This is an example of a lighting device installed at the front of a vehicle according to an embodiment, and Figure 23 This is an example of a lighting device installed at the rear of a vehicle according to an embodiment.

[0145] Reference Figures 21 to 23 The lighting device 1000 according to the embodiment can be applied to a vehicle 2000. One or more lights can be disposed in at least one of the front, rear, and side portions of the vehicle 2000. For example, refer to... Figure 22 The lamp, including the lighting device 1000, can be applied to the headlight 2100 of a vehicle. The headlight 2100 may include a first cover member 2110 and at least one first lamp module 2120 including the lamp. The first cover member 2110 houses 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 configured as a flat or curved surface depending on the shape of the first lamp module 2120. The headlight 2100 can provide various functions by controlling the driving timing of the lighting device 1000 included in the first lamp module 2120. For example, the headlight 2100 can provide at least one function of headlight, turn signal, daytime running light, high beam, low beam, and fog light through the light emission of the lighting device 1000. Furthermore, the headlight 2100 can provide additional functions such as welcome lights or celebratory effects when the driver opens the vehicle door, and it can provide information to vehicles or people located in front or to the side by forming signals, etc. In this case, light emitted from the headlight 2100 can be emitted in the form of a stereoscopic image.

[0146] Reference Figure 23The lamp, including the lighting device 1000, can be applied to the rear light 2200 of a vehicle. The rear light 2200 may include a second cover member 2210 and at least one second lamp module 2220 including the lamp.

[0147] 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 according to the design of the vehicle 2000 and may be configured as a flat or curved surface depending on the shape of the second lamp module 2220. The rear lamp 2200 can provide various 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 the functions of a side lamp, brake light, and turn signal indicator by emitting light from the lighting device 1000, and it may provide information to vehicles or people located in front or to the side by forming signals, etc. In this case, the light emitted from the rear lamp 2200 may be emitted in the form of a stereoscopic image. Here, the stereoscopic image may be an image recognized when a person sees the front lamp 2100 and / or the rear lamp 2200 from outside the vehicle 2000. The stereoscopic image is achieved through the opening portion 510 and the optical layer 700 as a contrast between the brightest and darkest areas, or by providing a three-dimensional effect in a three-dimensional form through the use of differences in depth or luminous intensity.

[0148] The features, structures, effects, etc., described in the above embodiments are included in at least one embodiment of the present invention, but are not necessarily limited to one embodiment. Furthermore, the features, structures, effects, etc., shown in the various embodiments can be combined or modified by those skilled in the art for other embodiments. Therefore, content related to these combinations and modifications should be interpreted as being included within the scope of the present invention.

[0149] Furthermore, although embodiments have been described above, they are merely examples and do not limit the invention. Those skilled in the art to which this invention pertains will exemplify the above without departing from the essential characteristics of these embodiments. It will be apparent that various modifications and applications are possible. For example, each component specifically shown in the embodiments can be implemented by modification. Moreover, differences associated with these modifications and applications should be interpreted as being included within the scope of the invention as defined in the appended claims.

Claims

1. A lighting device, comprising: substrate; The light source portion is disposed on the substrate; A resin layer is disposed on the substrate and covers the light source portion; A light-shielding layer disposed on the resin layer and having an opening portion; as well as An optical layer is disposed on the light-shielding layer. The opening portion includes a plurality of regularly arranged first openings. Light emitted from the light source portion is transmitted to the optical layer through the plurality of first openings, and then emitted to the outside through the optical layer. The light source portion includes a plurality of first light sources disposed in a first region of the resin layer and a plurality of second light sources disposed in a second region of the resin layer. The resin layer includes a groove disposed between the first region and the second region. The resin layer includes a first side surface and a second side surface facing in the second direction, as well as a third side surface and a fourth side surface facing in the first direction, wherein the first direction is orthogonal to the second direction, and The plurality of first light sources are disposed between the first side surface of the resin layer and the groove. Wherein, at least one of the plurality of first openings includes: The first unit is open; The third unit opening is spaced apart from the first unit opening in a first direction; The second unit opening is disposed between the first unit opening and the third unit opening and connects the first unit opening and the third unit opening; Wherein, the length of each of the openings of the first unit to the third unit is the same in the first direction. In the second direction, the length of the second unit opening 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. The second direction is a direction orthogonal to the first direction.

2. The lighting device according to claim 1, wherein, The number of the plurality of first openings is greater than the number of the plurality of first light sources.

3. The lighting device according to claim 1, wherein, The resin layer includes a connecting portion disposed between the first region and the second region and connecting the first region and the second region.

Images