Lighting device and lighting module comprising same

Abstract

The lighting device according to an embodiment may comprise: a substrate on which a plurality of light sources are disposed; a resin layer disposed on the substrate; a diffuser layer disposed on the resin layer; and a coating layer covering the diffuser layer and the resin layer, wherein the diffuser layer is disposed between the resin layer and the coating layer.

Description

Lighting device and lighting module including the same

[0001] An embodiment of the invention relates to a lighting device and a lighting module including the same.

[0002] Recently, lighting devices consisting of hundreds or thousands of small LEDs are being applied to automotive lighting modules.

[0003] These lighting devices utilize pixel lighting technology, allowing each LED to be controlled independently; this enables adjustment of lighting according to the surrounding environment or the creation of various lighting effects. For example, based on pixel lighting or surface lighting technology, it is possible to create various unique signature lights, such as those that exhibit distinctive design characteristics.

[0004] However, lighting modules according to conventional technology require an inner lens for light diffusion, and there was a problem in that the thickness and weight of the lighting device increased due to the inner lens.

[0005] One of the technical problems of the present invention is to provide a lighting device with the inner lens removed.

[0006] In addition, one of the other technical objectives of the present invention is to provide a lighting device in which the bonding strength between the silicone material resin layer, diffuser layer, and coating layer is improved.

[0007] In addition, one of the other technical objectives of the present invention is to provide a lighting device in which the light source is not visible when not illuminated and the aesthetic appeal is enhanced.

[0008] A lighting device according to an embodiment comprises a substrate having a plurality of light sources, a resin layer disposed on the substrate, a diffuser layer disposed on the resin layer, and a coating layer covering the diffuser layer and the resin layer, wherein an adhesive layer disposed between the coating layer and the resin layer is disposed, and the coating layer comprises a plurality of coating layers.

[0009] Additionally, the plurality of coating layers includes a first coating layer disposed on the adhesive layer and a second coating layer disposed on the first coating layer, and the first coating layer may include either a colored material or a metallic material.

[0010] Additionally, the first coating layer may include a first-1 coating layer comprising a light-blocking material and a first-2 coating layer disposed on the first-1 coating layer, comprising either the colored material or the metal material.

[0011] In addition, the above-mentioned 1-1 coating layer may include pattern holes.

[0012] In addition, the above pattern hole may include a pixel pattern.

[0013] In addition, the pattern hole may include a line pattern.

[0014] In addition, the second coating layer may include either a matte or a glossy material.

[0015] In addition, the thickness of the coating layer may be 0.01 mm or less.

[0016] In addition, the transmittance of the coating layer may have a range of 15% to 20%.

[0017] In addition, the thickness of the coating layer may be smaller than the thickness of the diffuser layer.

[0018] The lighting device of the embodiment of the invention does not have an inner lens, so the overall thickness and weight of the lighting device can be reduced.

[0019] In addition, by placing an adhesive layer on the resin layer and the diffuser layer, the bonding strength with the metal deposition layer and the coating layer including the colored material can be improved.

[0020] In addition, the coating layer is formed thinly to 0.01 mm or less, which can reduce light loss of the lighting device.

[0021] In addition, by including metallic and / or colored materials, the aesthetic appeal of the lighting device when not illuminated can be enhanced.

[0022] FIG. 1 is a perspective view of a lighting device according to an embodiment of the present invention.

[0023] Figure 2 is a cross-sectional view of A-A' in Figure 1.

[0024] Figure 3 is a cross-sectional view of B-B' in Figure 1.

[0025] FIG. 4 shows a cross-section of a lighting device according to a second embodiment.

[0026] FIG. 5 is a manufacturing flowchart of a lighting device according to a first embodiment.

[0027] FIG. 6 is a manufacturing flowchart of a lighting device according to a second embodiment.

[0028] FIGS. 7a to 7f show examples of lighting devices according to embodiments.

[0029] Hereinafter, preferred embodiments of the invention will be described in detail with reference to the attached drawings.

[0030] The technical concept of the present invention is not limited to the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted. Furthermore, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a meaning generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms used generally, such as those defined in advance, may be interpreted by considering their meaning in the context of the relevant technology. Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention. In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as "at least one of A and B and C (or more than one)," it may include one or more of all combinations that can be formed from A, B, and C. In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended merely to distinguish the component from other components and do not determine the essence, order, or sequence of the component. Furthermore, where it is stated that a component is 'connected,' 'combined,' or 'connected' to another component, this may include not only cases where the component is directly connected, combined, or connected to the other component, but also cases where it is 'connected,' 'combined,' or 'connected' due to another component located between the component and the other component.Furthermore, when described as being formed or placed "above or below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as "above or below," it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0031] FIG. 1 is a perspective view of a lighting device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view along A-A' of FIG. 1, and FIG. 3 is a cross-sectional view along B-B' of FIG. 1.

[0032] A lighting device (10) according to an embodiment may include a substrate (100), a plurality of light sources (150), a resin layer (200), a diffuser layer (300), and a coating layer (400). Additionally, although not illustrated, if the lighting device (10) according to an embodiment has a pixel lighting device, a partition may be provided between the plurality of light sources (150) and on the side forming the perimeter of the lighting device. For example, the partition may include a partition placed around each of the plurality of light sources (150). The partition may partition the plurality of light sources (150) to form a pixel area. The partition may block light interference between the plurality of light sources (150) and prevent the problem of light penetrating into adjacent pixel areas.

[0033] The substrate (100) may include a printed circuit board (PCB). The substrate (100) may include, for example, at least one of a resin-based printed circuit board (PCB), a metal core PCB, a flexible PCB, a ceramic PCB, or an FR-4 substrate. If the substrate (100) is a flexible PCB, the lighting device (10) may have flexible characteristics. The substrate (100) may be electrically connected to the plurality of light sources (150). The substrate (100) may be a single-layer substrate having a single wiring layer or a multi-layer substrate having a plurality of wiring layers.

[0034] The plurality of light sources (150) may be disposed on the substrate (100) and emit light in a direction toward the diffuser layer (300). The plurality of light sources (150) may be arranged in parallel along a first direction (x-axis). Additionally, the plurality of light sources (150) may be arranged in parallel along the first direction and a second direction (x, y-axis). The distance between the plurality of light sources (150) may be smaller than the thickness of the resin layer (200).

[0035] The light source (150) is a light-emitting device having a light-emitting diode chip (LED Chip), and may include various forms such as a package in which the light-emitting diode chip is packaged, a flip-chip, or a CSP (Chip scale package). The light-emitting diode chip may emit at least one of blue, red, green, ultraviolet (UV), or infrared light, and the light source (150) may emit at least one of white, blue, red, green, or infrared light, and may emit light in a colored light such as white, blue, or green. The light-emitting device of the light source (150) includes a mini LED chip or a micro LED chip.

[0036] The resin layer (200) may be disposed on the substrate (100) to seal and protect the plurality of light sources (150). The resin layer (200) may be disposed with an area equal to or smaller than the area of ​​the substrate (100). The resin layer (200) may be a resin material such as silicone or epoxy, or may include at least one of a plastic resin material such as polyester (PET) film, PMMA (Poly Methyl Methacrylate) material, or PC (Poly Carbonate). Preferably, the resin layer (200) may be silicone or PMMA.

[0037] The diffuser layer (300) may be disposed on the resin layer (200). For example, the diffuser layer (300) may be disposed on the upper surface of the resin layer (200). As another example, the diffuser layer (300) may be formed to cover not only the upper surface but also the side of the resin layer (200). The diffuser layer (300) diffuses the light emitted from the plurality of light sources (150) into a uniform light distribution, so that the lighting device (10) can form a surface light source.

[0038] The coating layer (400) may be arranged to cover the diffuser layer (300) and the resin layer (200). To strengthen the bonding strength between the diffuser layer (300), the resin layer (200), and the coating layer (300), an adhesive layer (50) may be applied between the diffuser layer (300), the resin layer (200), and the coating layer (400). The adhesive layer (50) may include a silane-based compound, urethane, acrylic, epoxy-based material, etc., as a primer.

[0039] The coating layer (400) may be deposited on the adhesive layer (50). The coating layer (400) may include at least one of a first coating layer (400a) and a second coating layer (400b).

[0040] Referring to FIG. 3, the lighting device according to the embodiment may include both a first coating layer (400a) and a second coating layer (400b).

[0041] The first coating layer (400a) may include either a metallic material or a colored material.

[0042] The metal material may include various metal materials. For example, the metal material may include tin. The metal material may express a chrome or metallic atmosphere in the lighting device. If the first coating layer (400a) includes the metal material, the metal material may be deposited on the adhesive layer (50). The colored material may include a colored urethane paint. For example, the colored material may have various colors such as red, green, gray, and black. If the first coating layer (400a) includes the colored material, the colored material may be coated on the adhesive (50).

[0043] The first coating layer (400a) is deposited or coated in the form of a thin film and may have a thickness (d1) of 0.01 mm or less. If the first coating layer (400a) has a colored urethane paint, the transmittance of the coating layer (400) may be less than 20%. For example, the transmittance of the first coating layer (400a) may be in the range of 15% to 20%.

[0044] The second coating layer (400b) may be disposed on the first coating layer (400a). The second coating layer (400b) may include a urethane paint and may include a glossy or matte material on the lighting device. The second coating layer (400b) may be a protective layer that protects the first coating layer (400a).

[0045]

[0046] The lighting device (10) according to the embodiment does not have an inner lens, so the overall thickness and weight of the lighting device (10) can be reduced.

[0047]

[0048] FIG. 4 shows a cross-section of a lighting device according to a second embodiment.

[0049] The coating layer (400) of the lighting device according to the second embodiment includes a first coating layer (400a) and a second coating layer (400b), and the first coating layer (400a) may include a first-1 coating layer (400a1) containing a light-blocking material and a first-2 coating layer (400a2) disposed on the first layer. At this time, the first-1 coating layer (400a1) may be referred to as a light-blocking layer, a black layer, etc. The first-1 coating layer (400a1) may be disposed on the adhesive layer (50). The light-blocking material may include black silicone that blocks light or has a low transmittance.

[0050] The first layer (400a1) may have at least one pattern hole (H). The pattern hole (H) may be formed by laser etching the first layer (400a1). The pattern hole (H) may be formed at a position that overlaps perpendicularly with the light source (150). The pattern hole (H) may have various shapes. For example, the pattern hole (H) may have a polygonal shape. Additionally, the pattern hole (H) may have a line-shaped gap extending in the longitudinal direction. The width (L) of the pattern hole (H) may range from 0.05 mm to 1 mm. Light emitted from the light source (150) may be emitted to the outside through the pattern hole (H). The first-second coating layer (400a2) and the second coating layer (400b) may be stacked sequentially on the pattern hole (H). Since the first-second coating layer (400a2) and the second coating layer (400b) are formed with a thin thickness, light passing through the pattern hole (H) can penetrate the first-second coating layer (400a2) and the second coating layer (400b) and be visible. The lighting device (10) can have a signature light by the light emitted through the pattern hole (H).

[0051] The first-second coating layer (400a2) may include either the metal material or the colored material. The first-second coating layer (400a2) may be referred to as a metal layer, a metal layer, a colored layer, or a color layer. The first-second coating layer (400a2) may be disposed on the first-first coating layer (400a1). The first-second coating layer (400a2) may be deposited or coated on the first-first coating layer (400a1).

[0052] When the first-second coating layer (400a2) comprises a metal material, the lighting device (10) according to the embodiment may have a metallic texture. The metal material may have a transmittance of 15% to less than 20%. If the transmittance is less than 15%, the light loss of the lighting device becomes too large and appears dark, and if the transmittance exceeds the 20% range, the pattern shape of the lighting device may not be visible.

[0053]

[0054] The second coating layer (400b) may include a urethane paint having a glossy or matte finish. The second coating layer (400b) may be deposited on the first coating layer (400a). The second coating layer (400b) may cover the first coating layer (400a). The second coating layer (400b) may include a protective material. The second coating layer (400b) may be filled into the pattern hole (H) formed in the first coating layer (400a). The second coating layer (400b) not only protects the first coating layer (400a) but can also provide a luxurious aesthetic to the lighting device (10).

[0055] The thickness (d1) of the coating layer (400) may be formed to be 0.01 mm or less. The transmittance of the coating layer (400) may be less than 20%. The thickness (d1) of the coating layer (400) may be smaller than the thickness of the diffuser layer (300). By forming the thickness of the coating layer (400) thinly, light loss can be reduced. The lighting device (10) has a metallic feel when not lit, and when lit, it transmits light to emit signature lighting such as pixel lighting or line lighting.

[0056] FIG. 5 is a manufacturing flowchart of a lighting device according to a first embodiment, and FIG. 6 is a manufacturing flowchart of a lighting device according to a second embodiment.

[0057] Referring to FIG. 5, a method for manufacturing a lighting device according to a first embodiment may include the step (S1) of manufacturing a lighting module by forming the resin layer (200) and the diffuser layer (300) on the substrate (100) which is provided with a plurality of light sources (150).

[0058] Subsequently, a step (S2) of coating an adhesive layer (50) on the lighting module may be performed. Next, a step (S3) of forming a first coating layer (400a) containing a colored material or a metallic material on the adhesive layer (50) may be performed. The colored material may include various colors such as red and gray, such as urethane paint. The metallic material may include tin. Next, a step (S4) of forming a protective layer (400b) containing a protective material on the surface of the first coating layer (400a) may be performed. The protective layer (400b) may include a glossy or matte material.

[0059] Referring to FIG. 6, a method for manufacturing a lighting device according to a second embodiment may include the step (S1) of manufacturing a lighting module by forming the resin layer (200) and the diffuser layer (300) on the substrate (100) which is equipped with a plurality of light sources (150).

[0060] Subsequently, a step (S2) of forming an adhesive layer (50) on the lighting module may be performed. Next, in the method for manufacturing a lighting device according to the second embodiment, a step (S31) of forming a light-blocking layer (400a1), which is a first-1 coating layer (400a1), on the adhesive layer (50) may be performed. Subsequently, a step (S32) of forming a pattern on the light-blocking layer (400a1) through laser etching may be performed. At this time, a plurality of pattern holes (H) may be formed in the light-blocking layer (400a1). Next, a step (S33) of forming a first-2 coating layer (400a2) containing a metal material or a colored material on the light-blocking layer (400a1) on which the pattern is formed is performed.

[0061] Finally, a step (S4) of forming a second coating layer (400b), which is a protective layer, on the first-second coating layer (400a2) may be performed.

[0062]

[0063] FIGS. 7a to 7f show examples of lighting devices according to embodiments.

[0064] Referring to FIG. 7a, the coating layer (400) of the lighting device according to the embodiment may be coated with a metal material deposition and a protective material. At this time, the metal material may include tin. When the lighting device (10) is turned on, light emitted from a light source can pass through a thin metal layer to emit a surface light source of metal material, and may have a metallic texture even when not turned on.

[0065] Referring to FIG. 7b, the coating layer (400) of the lighting device according to the embodiment may have a plurality of pattern holes (H) by performing laser etching on the light-blocking layer. Since each of the plurality of pattern holes (H) has a pixel, pixel lighting can be expressed when the lighting device (10) is turned on. In addition, the lighting device (10) may have a metallic feel by depositing a metal layer on the light-blocking layer on which the plurality of pattern holes are formed.

[0066] Referring to FIG. 7c, the coating layer (400) of the lighting device according to the embodiment can form a plurality of fine line (AL) patterns by laser etching the light-blocking layer. That is, the holes formed by laser etching in the light-blocking layer can have a plurality of fine line (AL) patterns. The thickness of the fine line (AL) can be 0.05 mm to 0.1 mm. When the lighting device (10) is turned on, light is emitted through the fine line (AL), and as the light diffracts through the fine line (AL), a unique signature lighting can be formed. In addition, the lighting device (10) has a metal material deposited on it, so that the lighting device can have a metallic feel when not turned on.

[0067] Referring to FIG. 7d, the coating layer (400) of the lighting device according to the embodiment may include a red colored material and a glossy or matte protective material. The lighting device (10) may form a red surface light source when lit by the colored material, and the light source (150) inside the lighting device (10) may not be visible when not lit.

[0068] Referring to FIG. 7e, the coating layer (400) of the lighting device according to the embodiment may include a gray colored material and a glossy or matte protective material. The lighting device (10) may form a gray surface light source when lit and may express a matte texture when not lit.

[0069] Referring to FIG. 7f, the coating layer (400) of the lighting device according to the embodiment may form a plurality of thick line (BL) patterns by laser etching the light-blocking layer. The thickness of the thick lines (BL) may be 0.5 mm to 1 mm. When the lighting device (10) is turned on, light is emitted through the thick lines (BL) to form a straight or curved appearance. Additionally, the lighting device (10) may have a metallic material deposited thereon so that it may have a metallic appearance when the lighting device is not turned on.

[0070]

[0071] Although the above description has focused on the embodiments, this is merely an example and does not limit the embodiments. A person skilled in the art will understand that various modifications and applications not exemplified above are possible within the scope of the essential characteristics of the embodiments. For instance, each component specifically shown in the embodiments may be modified. Furthermore, differences related to such modifications and applications should be interpreted as being included within the scope of the embodiments set forth in the appended claims.

[0072] The lighting device according to the present invention and the lighting module including the same can satisfy various lighting modes and design requirements to provide aesthetic appeal to the user. These characteristics can be usefully applied not only to functional lighting devices such as headlights, taillights, and turn signals, but also to emotional lighting devices such as interior ambient lights and welcome lights.

Claims

1. A substrate on which a plurality of light sources are arranged; A resin layer disposed on the above substrate; A diffuser layer disposed on the resin layer above; and It includes a coating layer covering the diffuser layer and the resin layer, and An adhesive layer is disposed between the coating layer and the resin layer, and A lighting device comprising a plurality of coating layers, wherein the above coating layer comprises 2. In Paragraph 1, The above plurality of coating layers, A first coating layer disposed on the adhesive layer and It includes a second coating layer disposed on the first coating layer, and The lighting device comprising either a colored material or a metallic material in the first coating layer.

3. In Paragraph 2, The first coating layer above A first-1 coating layer including a light-blocking material and A lighting device comprising a first-2 coating layer disposed on the first-1 coating layer and including either the colored material or the metallic material.

4. In Paragraph 3, The above-mentioned first-1 coating layer is a lighting device comprising a plurality of pattern holes.

5. In Paragraph 4, The above pattern hole is a lighting device including a pixel pattern.

6. In Paragraph 4, The above pattern hole is a lighting device including a line pattern.

7. In Paragraph 4, The second coating layer comprises either a matte or a glossy material. Lighting device.

8. In any one of paragraphs 1 through 7, A lighting device having a coating layer thickness of 0.01 mm or less.

9. In any one of paragraphs 1 through 7, A lighting device having a transmittance of the coating layer in the range of 15% to 20%.

10. In any one of paragraphs 1 through 7, A lighting device in which the thickness of the coating layer is smaller than the thickness of the diffuser layer.

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