Lighting apparatus and lamp including the same

Abstract

A lighting device according to an embodiment comprises: a substrate; a light-emitting element disposed on the substrate; a resin layer disposed on the substrate to cover the light-emitting element; and a diffusion layer disposed on the resin layer; wherein the resin layer includes a first recess, and a light-blocking pattern may be disposed within the first recess.

Description

Technology Field

[0001] The embodiments relate to a lighting device having enhanced performance and a lamp including the same. Background Technology

[0002] Lighting is a device that can supply light or control the amount of light, and it is used in various fields. For example, lighting devices are applied in various fields such as vehicles and buildings to illuminate the interior or exterior.

[0003] In particular, light-emitting devices are being used as lighting sources in recent years. These light-emitting devices, such as light-emitting diodes (LEDs), have advantages over conventional light sources like fluorescent and incandescent lamps, including lower power consumption, a semi-permanent lifespan, fast response speed, safety, and environmental friendliness. These LEDs are being applied to various optical assemblies, such as display devices, indoor lighting, and outdoor lighting.

[0004] Generally, vehicles utilize lamps of various colors and shapes, and recently, lamps employing light-emitting diodes (LEDs) as automotive light sources have been proposed. For example, LEDs are applied to vehicle headlights, taillights, and turn signals. However, these LEDs have a problem in that the emission angle of the light is relatively small. Consequently, when using LEDs for automotive lamps, there is a need to increase the light-emitting surface area of ​​the lamp.

[0005] Furthermore, logos or emblems featuring shapes or text symbolizing the manufacturer or brand are generally placed on the front of vehicles, and research on applying lamps to these logos or emblems has recently been underway. These logos or emblems are located on the front of the vehicle, such as the bonnet, radiator grille, and front bumper, or on the rear, such as the trunk and rear bumper. However, if lamps are applied behind the logo or emblem, the logo or emblem may protrude significantly from the vehicle's surface due to the lamps. Additionally, most of the light emitted from the lamps is released through the border area of ​​the logo or emblem, making it difficult for light to be emitted through the surface of the logo or emblem.

[0006] Furthermore, if the lamp includes a light-emitting diode, there is a problem in that a hot spot phenomenon occurs where light is concentrated on the light emitted from the light-emitting diode. In this case, when implementing a linear light source or a surface light source using the lamp, there is a problem in that the uniformity characteristics of the light-emitting surface are degraded.

[0007] Furthermore, when a light-emitting diode is applied to the aforementioned lamp, there is a problem in that the light-emitting diode is visible from the outside. For example, while the vehicle lamp may not be visible due to the light emitted from the light source when it is in the "On" state, the light-emitting diode is visible from the outside when the lamp is in the "Off" state, which leads to a problem of degraded aesthetic appeal and design freedom characteristics regarding the lamp.

[0008] Therefore, a new lighting device and lamp capable of solving the aforementioned problem are required. The problem to be solved

[0009] The embodiment aims to provide a lighting device and a lamp having enhanced light intensity.

[0010] In addition, the embodiment aims to provide a lighting device and a lamp capable of implementing a uniform linear light source or a surface light source.

[0011] In addition, the embodiments aim to provide a lighting device and a lamp having enhanced aesthetics. means of solving the problem

[0012] A lighting device according to an embodiment comprises: a substrate; a light-emitting element disposed on the substrate; a resin layer disposed on the substrate to cover the light-emitting element; and a diffusion layer disposed on the resin layer; wherein the resin layer includes a first recess, and a light-blocking pattern may be disposed within the first recess.

[0013] The first recess can be formed on the upper surface of the resin layer.

[0014] The first recess may be greater than or equal to the number of light-emitting elements.

[0015] The horizontal width of the first recess may be larger than the horizontal width of the light-emitting element.

[0016] The first recess can be superimposed vertically with the light-emitting element.

[0017] The above light-blocking pattern may include a plurality of patterns having different sizes.

[0018] The uppermost surface of the light-blocking pattern may be positioned at the same level as or lower than the uppermost surface of the resin layer.

[0019] The thickness of the light-blocking pattern above may be smaller than the depth of the first recess.

[0020] The resin layer further includes a second recess spaced apart from the first recess,

[0021] A reflective layer may be disposed within the second recess.

[0022] The second recess may not overlap vertically with the first recess.

[0023] The second recess can be formed at the same height as the first recess.

[0024] It further includes a printing layer disposed on the above diffusion layer, and

[0025] The above-mentioned printing layer may have at least one shape among a logo, an emblem, text, and an icon.

[0026] The second recess can be vertically overlapped with the printed layer.

[0027] The above reflective layer may have the same shape as the above printed layer.

[0028] The horizontal width of the second recess may be 80% to 100% of the horizontal width of the printed layer. Effects of the invention

[0029] The lighting device and lamp according to the embodiment may have enhanced optical characteristics. Specifically, the lighting device and lamp include a substrate, a reflective layer, a resin layer, a diffusion layer, and a light transmission control layer, and the above components may have a set thickness in a set area. Accordingly, the embodiment can control the transmittance of light emitted from the light-emitting element and emitted to the outside of the lighting device, and the emitted light may have uniform brightness. Therefore, the lighting device and lamp may provide a linear light source or a planar light source having enhanced optical characteristics.

[0030] In addition, the lighting device and lamp according to the embodiment can prevent or minimize the occurrence of a hot spot phenomenon in which light emitted from a light-emitting element is concentrated. Specifically, the lighting device and lamp include a light-blocking layer disposed in an area corresponding to the light-emitting element, and the concentration of light emitted from the light-emitting element can be controlled by the light-blocking layer. Accordingly, the lighting device and lamp can provide light having uniform brightness.

[0031] In addition, the lighting device and lamp according to the embodiment may have a hidden effect. Specifically, the lighting device and lamp may include a light transmission control layer having a color identical or similar to the color of the surrounding area. Accordingly, when the lighting device and lamp are not emitting light (Off state), their surface may have a color corresponding to the surrounding area and provide a metallic surface. In addition, when the lighting device and lamp emit light, they may provide light with excellent brightness and uniformity to the outside.

[0032] For example, the lighting device and lamp described above may be applied to a vehicle and have a shape corresponding to the shape of an emblem. In this case, when the lighting device and lamp emit light, the lamp may emit light in the shape of an emblem with excellent brightness and uniformity. Additionally, when the lighting device and lamp do not emit light, only the printed layer area of ​​the lighting device may be visible from the outside of the vehicle, and the area other than the printed layer may provide a metallic surface feel having a color corresponding to the vehicle. Accordingly, the lighting device and lamp according to the embodiment may have enhanced aesthetics and design freedom characteristics. Brief explanation of the drawing

[0033] FIG. 1 is a cross-sectional view of a lighting device according to an embodiment. FIG. 2 is a top view of a lighting device according to an embodiment with some components omitted. FIG. 3 is a cross-sectional view of a light transmission control layer according to an embodiment. Figure 4 is a bottom view of a light transmission control layer according to an embodiment. FIGS. 5 to 9 are different cross-sectional views of a lighting device according to an embodiment. FIG. 10 is a diagram illustrating the light transmittance according to the area of ​​the transmitting region and the non-transmitting region of the light transmission control layer in a lighting device according to an example and a comparative example. FIG. 11 is data on the luminance uniformity of a lighting device according to an embodiment. FIGS. 12 and FIGS. 13 are drawings illustrating an example in which a lamp including a lighting device according to an embodiment is applied to a vehicle. Specific details for implementing the invention

[0034] Hereinafter, preferred embodiments of the invention will be described in detail with reference to the attached drawings.

[0035] The technical concept of the present invention is not limited to some of 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. Furthermore, 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 a component from other components and are not determined by the nature, order, or sequence of the said component. Furthermore, where it is stated that a component is 'connected,' 'combined,' or 'joined' to another component, this may include not only cases where the component is directly connected, combined, or joined to the other component, but also cases where it is 'connected,' 'combined,' or 'joined' 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.

[0036] In addition, the lighting device according to the embodiment can be applied to various lamp devices requiring lighting, such as vehicle lamps, household optical assemblies, and industrial optical assemblies. For example, when applied to vehicle lamps, it can be applied to headlamps, side mirrors, side maker lights, fog lights, tail lamps, brake lights, daytime running lights, vehicle interior lighting, door scars, rear combination lamps, backup lamps, emblem lamps, logo lamps, etc. Additionally, when applied to vehicle lamps, it can be applied to blind spot detection (BSD) systems placed on side mirrors or A-pillars, etc. Furthermore, the lighting device can be applied to indoor and outdoor advertising devices, display devices, and various electric vehicle fields, and it can also be applied to all lighting-related fields or advertising-related fields that are currently developed and commercialized or that can be implemented through future technological advancements.

[0037] Additionally, prior to describing the embodiments, the first direction may refer to the x-axis direction shown in the drawing, the second direction may refer to the y-axis direction shown in the drawing, and the third direction may refer to the z-axis direction shown in the drawing. Furthermore, the horizontal direction may refer to the first and second directions, and the vertical direction may refer to the third direction as a direction perpendicular to at least one of the first and second directions. For example, the horizontal direction may refer to the x-axis and y-axis directions of the drawing, and the vertical direction may be the z-axis direction of the drawing, which is a direction perpendicular to the x-axis and y-axis directions.

[0039] FIG. 1 is a cross-sectional view of a lighting device according to an embodiment, and FIG. 2 is a top view of a lighting device according to an embodiment with some components omitted. In addition, FIG. 3 is a cross-sectional view of a light transmission control layer according to an embodiment, and FIG. 4 is a bottom view of a light transmission control layer according to an embodiment.

[0040] Referring to FIGS. 1 to 4, a lighting device (1000) according to an embodiment can emit light emitted from at least one light-emitting element (200) as a linear light source or a planar light source. For example, the lighting device (1000) can emit light emitted from the lighting device (1000) in the form of a linear light source or a planar light source, including a region that reflects the light emitted from the light-emitting element (200) and a region that diffuses the light.

[0041] The lighting device (1000) may be provided rigidly or as a module having flexibility. For example, it may be flat or flexible with respect to at least one of the first to third directions (x, y, z axis directions).

[0042] The lighting device (1000) may have a length in a first direction (x-axis direction) and a length in a second direction (y-axis direction). The lengths in the first and second directions of the lighting device (1000) may vary depending on the number of light-emitting elements (200) arranged in the first and second directions within the lighting device (1000). Additionally, the total height (z-axis direction) of the lighting device (1000) may be about 4 mm or less. Specifically, the height of the lighting device (1000) may be about 3.5 mm or less. Accordingly, the lighting device (1000) according to the embodiment may have a thin thickness and be provided in various lengths, and may provide light with excellent uniformity in the upward direction.

[0044] The above lighting device (1000) is described in more detail below.

[0045] A lighting device (1000) according to an embodiment may include a substrate (100), a light-emitting element (200), a first reflective layer (300), a resin layer (400), a light-blocking layer (500), a diffusion layer (600), and a light transmission control layer (700).

[0046] The substrate (100) may include a printed circuit board (PCB) having wiring. The substrate (100) may include, for example, a resin-based printed circuit board (PCB), a metal core PCB, a flexible PCB, a non-flexible PCB, a ceramic PCB, or an FR-4 substrate.

[0047] A wiring layer (not shown) may be disposed on the substrate (100). The wiring layer may be electrically connected to the light-emitting element (200). For example, if a plurality of light-emitting elements (200) are provided, the plurality of light-emitting elements (200) may be connected in series, parallel, or series-parallel by the wiring layer. The substrate (100) may be disposed below the light-emitting element (200) and the resin layer (400) to perform the functions of a base member and a support member.

[0048] The substrate (100) may have a thickness of approximately 50 μm to approximately 2 mm. Specifically, the substrate (100) may have a thickness of approximately 100 μm to approximately 1.8 mm. More specifically, the substrate (100) may have a thickness of approximately 200 μm to approximately 1.6 mm. If the substrate (100) has a thickness of less than approximately 100 μm, it may be difficult to effectively support components disposed on the substrate (100), such as the light-emitting element (200) and the resin layer (400). Additionally, if the thickness of the substrate (100) is excessively thin, a problem of reduced reliability may occur. Furthermore, if 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, it is desirable for the substrate (100) to satisfy the above-described range.

[0049] The substrate (100) may further include a connector (not shown) disposed in a portion thereof. The substrate (100) may provide power applied through the connector to the light-emitting element (200). The connector may be formed in at least one of the upper and lower surfaces of the substrate (100). For example, if the connector is disposed on the upper surface where the light-emitting element (200) and the resin layer (400) are disposed, the connector may be disposed on a portion of the substrate (100) where the resin layer (400) is not disposed. Alternatively, if the connector is disposed on the lower surface of the substrate (100), the resin layer (400) may be disposed on the entire upper surface of the substrate (100), and the portion where the resin layer (400) is not disposed may be omitted.

[0051] The light-emitting element (200) may be disposed on the substrate (100). For example, the light-emitting element (200) may be disposed on the upper surface of the substrate (100) facing the resin layer (400). The light-emitting element (200) may be connected to the substrate (100). For example, the light-emitting element (200) may be electrically connected to an electrode layer (not shown) disposed on the upper surface of the substrate (100).

[0052] The light-emitting element (200) may include an LED chip. The LED chip may include at least one of a blue LED chip, a red LED chip, and a green LED chip. Each of the light-emitting elements (200) may have an LED chip having a single color, a plurality of LED chips having the same color, or a plurality of LED chips having different colors.

[0053] One or more of the light-emitting elements (200) may be arranged on the substrate (100). For example, a plurality of light-emitting elements (200) spaced apart from each other may be arranged on the substrate (100), and the plurality of light-emitting elements (200) may be spaced apart in a second direction (y-axis direction) as shown in FIG. 1. Also, although not shown in the drawing, the plurality of light-emitting elements (200) may be arranged on the substrate (100) in a row (x-axis direction) * column (y-axis direction) (where a and b are equal or different natural numbers). Also, although not shown in the drawing, the plurality of light-emitting elements (200) may be arranged in a predetermined order or disorderly according to the shape of the light to be realized through the lighting device (1000).

[0054] The light-emitting element (200) may include a light-emitting surface (205) from which light is emitted. The light-emitting surface (205) of the light-emitting element (200) may face the side of the resin layer (400). That is, the light-emitting element (200) may be provided as a side-view type package including the LED chip. The light-emitting element (200) may emit light toward the side of the resin layer (400). The light-emitting element (200) may emit light of the highest intensity toward the side of the resin layer (400). The light emitted through the light-emitting surface (205) of the light-emitting element (200) may be provided to the first reflective layer (300). Light provided to the first reflective layer (300) can be reflected by the first reflective layer (300) and emitted in the direction of the upper surface of the resin layer (400), and the light emitted through the upper surface of the resin layer (400) can have the form of a linear light source or a planar light source. Additionally, the light-emitting surface (205) may be a plane perpendicular to the upper surface of the substrate (100), or may include a concave or convex surface with respect to the side of the resin layer (400). The optical axis of the light-emitting element (200) may be parallel to the upper surface of the substrate (100). Additionally, the optical axis of the light-emitting element (200) may be parallel to the upper surface of the resin layer (400).

[0056] The lighting device (1000) may include a first reflective layer (300). The first reflective layer (300) may be disposed on the upper surface of the substrate (100). The first reflective layer (300) may be disposed between the substrate (100) and the resin layer (400).

[0057] The first reflective layer (300) may have an area smaller than the upper surface area of ​​the substrate (100). The first reflective layer (300) may be placed over most of the upper surface area of ​​the substrate (100). Additionally, the first reflective layer (300) may be spaced apart from the edge of the substrate (100), and the resin layer (400) may be placed in the spaced-away area to adhere to the substrate (100). Accordingly, the edge portion of the first reflective layer (300) may be prevented from peeling off.

[0058] The first reflective layer (300) may include an opening (301) in which the lower portion of the light-emitting element (200) is disposed. In the opening (301) of the first reflective layer (300), the upper surface of the substrate (100) is exposed, and a portion to which the lower portion of the light-emitting element (200) is bonded may be disposed. The size of the opening (301) may be larger than or equal to the size of the light-emitting element (200) as shown in FIG. 1, but is not limited thereto.

[0059] Additionally, the first reflective layer (300) may be thinner than the thickness of the substrate (100). For example, the thickness of the first reflective layer (300) may be about 0.5 to about 1 time the thickness of the substrate (100) to reduce the transmission loss of incident light. Additionally, the first reflective layer (300) may be formed with a thickness thinner than the height of the light-emitting element (200). Accordingly, the lower part of the light-emitting element (200) may be inserted into the first reflective layer (300) through the opening (301) of the first reflective layer (300), and the upper part of the light-emitting element (200) may protrude. The light-emitting surface (205) of the light-emitting element (200) may be provided in a direction perpendicular to the upper surface of the first reflective layer (300).

[0060] The first reflective layer (300) may include a metallic material or a non-metallic material. The metallic material may include metals such as aluminum, silver, and gold. The non-metallic material may include a plastic material or a resin material. The plastic material may be any one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polychlorinated biphenyl, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polybutylene terephthalate, polyethylene naphthalate, polyamide, polyacetal, polyphenylene ether, polyamideimide, polyetherimide, polyetheretherketone, polyimide, polytetrafluoroethylene, liquid crystal polymer, fluoropolymer, copolymers thereof, and mixtures thereof. The resin material may have a reflective material, such as a metal oxide such as TiO2, Al2O3, or SiO2, added to silicone or epoxy. The first reflective layer (300) can be implemented as a single layer or multiple layers, and the light reflection efficiency can be improved by such a layer structure. The first reflective layer (300) according to the embodiment can increase the amount of light so that the light is emitted with a uniform distribution by reflecting incident light. Here, the first reflective layer (300) may be omitted if a high-reflection material is coated on the upper surface of the substrate (100).

[0061] The first reflective layer (300) may include a plurality of reflective materials (not shown). The reflective materials may be bubbles such as air, or a medium having the same refractive index as air. The first reflective layer (300) may reflect incident light or refract it in a different direction by the plurality of reflective materials.

[0062] The first reflective layer (300) may include a reflective pattern (310). The reflective pattern (310) may have a plurality of dot shapes. The plurality of reflective patterns (310) may be disposed on the upper surface of the first reflective layer (300). For example, the plurality of reflective patterns (310) may be disposed in a form protruding from the upper surface of the first reflective layer (300). The plurality of reflective patterns (310) may be spaced apart from the light-emitting element (200) and may be disposed in the direction of light emission from the light-emitting element (200).

[0063] The plurality of reflection patterns (310) may be formed on the first reflection layer (300) through a printing process. The plurality of reflection patterns (310) may include reflective ink. The plurality of reflection patterns (310) may be printed using a material including any one of TiO2, CaCO3, BaSO4, Al2O3, Silicon, and PS. The planar shape of each of the plurality of reflection patterns (310) may be one selected from a circle, an ellipse, or a polygon. Additionally, each of the plurality of reflection patterns (310) may have a side cross-section that is hemispherical or polygonal. The material of the plurality of reflection patterns (310) may be white.

[0064] The density of the plurality of reflection patterns (310), such as the dot pattern density, may increase as it moves further away from the light-emitting element (200). Specifically, the density of the reflection patterns (310) per unit area may increase as it moves further away from the light-emitting surface (205) of the light-emitting element (200). For example, the density of the reflection patterns (310) per unit area may increase as it moves from the light-emitting surface (205) toward the lateral direction of the resin layer (400) facing the light-emitting surface (205).

[0065] Additionally, the size of the plurality of reflection patterns (310) may change as it moves away from the light-emitting surface of the light-emitting element (200). Specifically, the horizontal width of the plurality of reflection patterns (310) may increase as it moves away from the light-emitting surface (205) of the light-emitting element (200). For example, the size of the reflection pattern (310) may increase as it moves from the light-emitting surface (205) of the light-emitting element (200) toward the lateral direction of the resin layer (400) facing the light-emitting surface (205).

[0066] Additionally, the plurality of reflection patterns (310) may also be disposed on the substrate (100) facing the rear and side surfaces of the light-emitting element (200). Here, the rear surface of the light-emitting element (200) may be a surface opposite to the light-emitting surface (205) of the light-emitting element (200), and the side surfaces may be sides connecting the light-emitting surface (205) of the light-emitting element (200) and the rear surface.

[0067] That is, the plurality of reflection patterns (310) may be placed on the path of light emitted from the light-emitting element (200) and / or the path of light emitted from the light-emitting element (200) and reflected to another configuration. Accordingly, the embodiment can improve light reflectivity to reduce light loss and improve the brightness of a line light source or a surface light source emitted through the upper surface of the resin layer (400).

[0069] The resin layer (400) may be disposed on the substrate (100). The resin layer (400) may be disposed on the upper surface of the substrate (100). The resin layer (400) may be disposed on the first reflective layer (300). The resin layer (400) may be disposed on the entire or a portion of the upper surface of the substrate (100).

[0070] The resin layer (400) may be formed from a transparent material. The resin layer (400) may include a resin material such as silicone or epoxy. The resin layer (400) may include a thermosetting resin material, and may optionally include, for example, PC, OPS, PMMA, PVC, etc. The resin layer (400) may be formed from glass, but is not limited thereto. For example, the main material of the resin layer (400) may use a resin material with urethane acrylate oligomer as the main raw material. For instance, a synthetic oligomer, such as urethane acrylate oligomer, may be mixed with a polymer type such as polyacrylate. Of course, the mixture may further include monomers such as IBOA (isobornyl acrylate), HPA (Hydroxylpropyl acrylate), 2-HEA (2-hydroxyethyl acrylate), which are low-boiling point diluted reactive monomers, and may also include photoinitiators (such as 1-hydroxycyclohexyl phenyl-ketone) or antioxidants as additives.

[0071] The resin layer (400) is provided as a layer that guides light with resin, so it can be provided with a thin thickness compared to glass and can be provided as a flexible plate. The resin layer (400) can emit a point light source emitted from the light-emitting element (200) in the form of a line light source or a surface light source.

[0072] The upper surface of the resin layer (400) can emit light by diffusing the light emitted from the light-emitting element (200). For example, the resin layer (400) may contain beads (not shown), and the beads can increase the amount of light by diffusing and reflecting the incident light. The beads may be arranged in a range of 0.01 to 0.3% relative to the weight of the resin layer (400). The beads may be composed of any one selected from silicon, silica, glass bubble, PMMA (Polymethyl methacrylate), urethane, Zn, Zr, Al2O3, and acrylic, and the particle size of the beads may be in the range of about 1 μm to about 20 μm, but is not limited thereto.

[0074] The resin layer (400) may have a thickness greater than that of the light-emitting element (200). For example, the resin layer (400) may have a thickness of about 4 mm or less. Specifically, the resin layer (400) may have a thickness of about 0.5 mm to about 4 mm or less. More specifically, the resin layer (400) may have a thickness of about 1 mm to about 3 mm. If the thickness of the resin layer (400) is less than about 0.5 mm, it may be difficult to effectively guide the light to be emitted from the light-emitting element (200). That is, the gap between the light-emitting element (200) and the first reflective layer (300) is too small, making it difficult for the lighting device (1000) to implement a point or surface light source. Additionally, if the thickness of the resin layer (400) exceeds about 4 mm, the overall light path may increase. Accordingly, light loss may occur during the process of light being emitted from the light-emitting element (200). Therefore, it is desirable for the thickness of the resin layer (400) to satisfy the range described above.

[0075] The resin layer (400) can be positioned to surround the light-emitting element (200). The resin layer (400) can seal the light-emitting element (200). The resin layer (400) can protect the light-emitting element (200) and reduce the loss of light emitted from the light-emitting element (200).

[0076] Additionally, the resin layer (400) may come into contact with the surface of the light-emitting element (200) and may come into contact with the light-emitting surface (205) of the light-emitting element (200). Additionally, the resin layer (400) may come into contact with the upper surface of the substrate (100) and the upper surface of the first reflective layer (300). Additionally, the resin layer (400) may come into contact with the side of the first reflective layer (300) exposed by the opening (301) of the first reflective layer (300) and the upper surface of the substrate (100). That is, the resin layer (400) may support the substrate (100), the light-emitting element (200), and the first reflective layer (300), and may be provided with a set thickness to effectively guide the light emitted from the light-emitting element (200).

[0078] The light-blocking layer (500) may be disposed on the resin layer (400). Specifically, the light-blocking layer (500) may be disposed on the upper surface of the resin layer (400). The light-blocking layer (500) may be disposed on the entire or a portion of the upper surface of the resin layer (400). The light-blocking layer (500) may be provided in a planar manner corresponding to the upper surface of the resin layer (400).

[0079] The light-blocking layer (500) may include a light-transmitting substrate (510) and a light-blocking pattern (520).

[0080] The light-transmitting substrate (510) may be disposed on the upper surface of the resin layer (400). The light-transmitting substrate (510) may be disposed on the entire or a portion of the upper surface of the resin layer (400). For example, the light-transmitting substrate (510) may have the same planar area as the upper surface of the resin layer (400) and may be disposed on the entire area.

[0081] The light-transmitting substrate (510) may include a light-transmitting material capable of transmitting light emitted from the light-emitting element (200). For example, the light-transmitting substrate (510) may include at least one of PET (Polyethylene terephthalate), PS (Polystyrene), PI (Polyimide), PEN (Polyethylene naphthalate), and PC (Poly carbonate). The light-transmitting substrate (510) may be transparent.

[0082] The light-transmitting substrate (510) may have a set thickness. For example, the thickness of the light-transmitting substrate (510) may be about 150 μm or less. In detail, the thickness of the light-transmitting substrate (510) may be about 100 μm or less. More specifically, the thickness of the light-transmitting substrate (510) may be about 20 μm to about 100 μm. The light-transmitting substrate (510) may be provided in the form of a light-transmitting film having a set thickness.

[0084] The light-blocking pattern (520) may be placed on the light-transmitting substrate (510). The light-blocking pattern (520) may be placed on at least one of the lower surface of the light-transmitting substrate (510) facing the resin layer (400) and the upper surface opposite to the lower surface. For example, the light-blocking pattern (520) may be placed on the lower surface of the light-transmitting substrate (510).

[0085] The light-blocking pattern (520) may be placed on the entire surface or a portion of the light-transmitting substrate (510). For example, the light-blocking pattern (520) may be placed on a portion of the surface of the light-transmitting substrate (510) corresponding to the light-emitting element (200). The light-blocking pattern (520) may be printed by overlapping a plurality of layers on the lower surface of the light-transmitting substrate (510). Additionally, the light-blocking pattern (520) may have a structure including a plurality of patterns having different sizes. The light-blocking pattern (520) may have a protruding shape on the lower surface of the light-transmitting substrate (510).

[0086] The light-blocking pattern (520) may be provided in a number greater than or equal to the number of light-emitting elements (200). Additionally, the light-blocking pattern (520) may be placed in an area corresponding to the light-emitting element (200). Specifically, a portion of the light-blocking pattern (520) may overlap with the light-emitting element (200) in a vertical direction (z-axis direction).

[0087] The light-blocking pattern (520) can block light emitted from the light-emitting element (200). For example, the light-blocking pattern (520) can block light emitted through the upper surface of the resin layer (400). The light-blocking pattern (520) may include ink. For example, the light-blocking pattern (520) may be printed with a material including any one of TiO2, CaCO3, BaSO4, Al2O3, Silicon, and PS. The light-blocking pattern (520) may be white with excellent reflective properties.

[0088] When the light-blocking pattern (520) is viewed from above, the planar shape of the light-blocking pattern (520) may have various shapes such as a circle, an ellipse, or a polygon. For example, the planar shape of the light-blocking pattern (520) may have a shape that includes a curve, taking into account the emission direction and directional angle of the light-emitting element (200), and may have a shape that extends along the emission direction of the light-emitting element (200).

[0089] Additionally, when the light-blocking pattern (520) is viewed from above, the horizontal width of the light-blocking pattern (520) may be greater than the horizontal width of the light-emitting element (200). For example, the light-emitting surface of the light-emitting element (200) may face a first direction, and the length of the second direction (y-axis direction) of the element may be longer than the length of the first direction (x-axis direction). In this case, the width of the light-blocking pattern (520) in the first direction may be greater than the length of the light-emitting element (200) in the first direction. Additionally, the width of the light-blocking pattern (520) in the second direction may be greater than the length of the light-emitting element (200) in the second direction.

[0090] The light-blocking layer (500) may further include a first adhesive layer (520). The first adhesive layer (520) may be placed around the perimeter of the light-blocking pattern (520). The first adhesive layer (520) may be placed between the resin layer (400) and the light-transmitting substrate (510). The first adhesive layer (520) may be placed in an area on the lower surface of the light-transmitting substrate (510) where the light-blocking pattern (520) is not placed. The first adhesive layer (520) may include a light-transmitting adhesive material. The first adhesive layer (520) may bond the resin layer (400) and the light-blocking layer (500).

[0091] That is, the lighting device (1000) according to the embodiment can improve brightness uniformity characteristics by including the light-blocking layer (500). Specifically, the light-blocking layer (500) includes a light-blocking pattern (520), and the light-blocking pattern (520) can be placed in an area where light emitted from the light-emitting element (200) can be concentrated. Accordingly, the lighting device (1000) according to the embodiment can prevent a hot spot from being formed by the light emitted from the light-emitting element (200).

[0093] The above diffusion layer (600) may be disposed on the light-blocking layer (500). The above diffusion layer (600) may be disposed on the entire or a portion of the upper surface of the light-blocking layer (500). The above diffusion layer (600) may be provided in a planar shape corresponding to the light-blocking layer (500).

[0094] The material of the above diffusion layer (600) may be a transparent material. The above diffusion layer (600) may include at least one of PET (Polyethylene terephthalate), PMMA (Poly Methyl Methacrylate), or PC (Poly Carbonate). The above diffusion layer (600) may be provided as a film made of a resin material such as silicone or epoxy. The above diffusion layer (600) may include a single layer or multiple layers.

[0095] The above diffusion layer (600) can diffuse light emitted through the resin layer (400). Additionally, since a specific color may not be mixed when the light intensity is high, the above diffusion layer (600) can diffuse the lights to mix them.

[0096] The thickness of the above-mentioned diffusion layer (600) may be about 25 μm or more. For example, the thickness of the above-mentioned diffusion layer (600) may be about 25 μm to about 250 μm. Specifically, the thickness of the above-mentioned diffusion layer (600) may be about 100 μm to about 250 μm. Such a diffusion layer (600) has the thickness range described above and can provide incident light as a uniform surface light source.

[0097] The above diffusion layer (600) may include at least one or more of a diffusing agent such as beads, a phosphor, and ink particles. The phosphor may include, for example, at least one of a red phosphor, an amber phosphor, a yellow phosphor, a green phosphor, or a white phosphor. The ink particles may include at least one of a metallic ink, a UV ink, or a curing ink. The size of the ink particles may be smaller than the size of the phosphor. The surface color of the ink particles may be any one of green, red, yellow, or blue. The type of ink may be selectively applied from among PVC (Poly vinyl chloride) ink, PC (Polycarbonate) ink, ABS (acrylonitrile butadiene styrene copolymer) ink, UV resin ink, epoxy ink, silicone ink, PP (polypropylene) ink, water-based ink, plastic ink, PMMA (poly methyl methacrylate) ink, and PS (Polystyrene) ink. The ink particles may include at least one of a metallic ink, a UV ink, or a curing ink.

[0099] The light transmission control layer (700) may be disposed on the diffusion layer (600). The light transmission control layer (700) may be disposed on the entire or partial upper surface of the diffusion layer (600). The light transmission control layer (700) may be provided in a planar shape corresponding to the upper surface of the diffusion layer (600).

[0100] The light transmission control layer (700) may include a first substrate (710) and a pattern layer (720).

[0101] The first substrate (710) may be placed on the diffusion layer (600). The first substrate (710) may transmit light emitted through the diffusion layer (600), such as light emitted from the light-emitting element (200). That is, the first substrate (710) may include a light-transmitting material. For example, the first substrate (710) may include at least one of PET (Polyethylene terephthalate), PS (Polystyrene), PI (Polyimide), PEN (Polyethylene naphthalate), and PC (Poly carbonate). The first substrate (710) may be colorless or colored and transparent, and may be provided in the form of a light-transmitting film.

[0102] The first substrate (710) may have a set thickness. For example, the thickness of the first substrate (710) may be about 10 µm to about 40 µm. Specifically, the thickness of the first substrate (710) may be about 10 µm to about 30 µm. If the thickness of the first substrate (710) is less than about 10 µm, it may be difficult for the first substrate (710) to effectively support the pattern layer (720). Additionally, if the thickness of the first substrate (710) exceeds about 40 µm, the total thickness of the light transmission control layer (700) may increase, and as a result, it may be difficult to provide the lighting device (1000) slimly.

[0104] The pattern layer (720) may be disposed on the first substrate (710). The pattern layer (720) may be disposed on at least one surface of the first substrate (710) facing the upper surface of the resin layer (400) and the other surface opposite to the upper surface. For example, the pattern layer (720) may be disposed on the lower surface of the first substrate (710), which is one surface of the first substrate (710).

[0105] The pattern layer (720) may include one or more pattern particles (721) that have an irregular shape and are arranged in a random area. At this time, when viewed from above, the pattern particles (721) may have a particle size of several micrometers (μm) to several tens of millimeters (mm). Here, having one pattern particle (721) may mean that a plurality of sub-pattern particles are partially and / or wholly connected to adjacent sub-pattern particles to form a single irregular shape. Additionally, having multiple pattern particles (721) may mean that some of the plurality of sub-pattern particles are partially and / or wholly connected to adjacent sub-pattern particles to form a single unit pattern particle having an irregular shape, and that there are multiple such unit pattern particles. At this time, the plurality of unit pattern particles may be spaced apart from each other.

[0106] The pattern particles (721) may be formed on the first substrate (710) through processes such as deposition or printing. The pattern particles (721) may include a material capable of blocking or reflecting light emitted from the light-emitting element (200). The pattern particles (721) may include a metallic material or a non-metallic material. For example, the pattern particles (721) may include at least one of metals such as aluminum (Al), chromium (Cr), titanium (Ti), copper (Cu), silver (Ag), gold (Au), platinum (Pt), stainless steel (SUS), tungsten (W), nickel (Ni), molybdenum (Mo), titanium (Ti), manganese (Mn), tin (Sn), zinc (Zn), and iron (Fe), and alloys containing the same. Preferably, the pattern particles (721) may include at least one of aluminum (Al), chromium (Cr), and stainless steel (SUS) among the metals and alloys containing the same.

[0107] The pattern particle (721) may have a shape protruding from the surface of the first substrate (710). For example, the pattern particle (721) may have a shape protruding from the lower surface of the first substrate (710) toward the resin layer (400). At this time, the thickness (height) of the pattern particle (721) may be about 12 μm or less. Specifically, the thickness of the pattern particle (721) may be about 1.5 μm to about 12 μm. Preferably, the thickness of the pattern particle (721) may be about 2 μm to about 10 μm, taking into account light loss, brightness uniformity, etc.

[0108] If the thickness of the pattern particle (721) is less than about 1.5 μm, it may be difficult to control the transmittance of light passing through the diffusion layer (600) through the pattern particle (721). That is, most of the light passing through the diffusion layer (600) may pass through the pattern particle (721). In addition, if the thickness of the pattern particle (721) is less than 1.5 μm, when the lighting device (1000) is viewed from the outside without power applied, it may be difficult to get a metallic feel from the surface of the lighting device (1000).

[0109] Additionally, if the thickness of the pattern particles (721) exceeds approximately 12 μm, when the lighting device (1000) is viewed from the outside without power applied, a metallic feel can be clearly obtained from the surface of the lighting device (1000). However, if the thickness of the pattern particles (721) exceeds approximately 12 μm, it may be difficult to control the area of ​​the pattern particles (721) placed on the first substrate (710). Also, due to the relatively thick thickness, light emitted from the light-emitting element (200) may not be transmitted. Accordingly, the light transmission control layer (700) may find it difficult to control the light transmittance using the pattern particles (721), and the overall brightness of the lighting device (1000) and the uniformity of the brightness of the emitted light may be reduced by the pattern particles (721).

[0110] That is, it is desirable that the thickness of the pattern particle (721) satisfies the thickness range described above. Accordingly, the pattern particle (721) controls the transmittance of light emitted from the light-emitting element (200), minimizes loss of brightness and uniformity, functions as a semi-transparent layer, and can provide a non-operational metallic feel of the lighting device (1000).

[0112] Additionally, the light transmission control layer (700) may include a second substrate (730).

[0113] The second substrate (730) may be placed on the first substrate (710). The second substrate (730) may be placed on at least one of the first and other surfaces of the first substrate (710). For example, the second substrate (730) may be placed in an area opposite to the pattern layer (720). That is, if the pattern layer (720) is placed on one surface of the first substrate (710), the second substrate (730) may be placed on the other surface of the first substrate (710).

[0114] The second substrate (730) can transmit light emitted through the first substrate (710), such as light emitted from the light-emitting element (200). The second substrate (730) may include a light-transmitting material. For example, the second substrate (730) may include at least one of PMMA (Poly(methyl methacrylate)), PET (Polyethylene terephthalate), PS (Polystyrene), PI (Polyimide), PEN (Polyethylene naphthalate), and PC (Poly carbonate). The second substrate (730) may be colorless or colored and transparent, and may be provided in the form of a light-transmitting film.

[0115] The second substrate (730) may have a set thickness. The second substrate (730) may have a thicker thickness than the first substrate (710). For example, the thickness of the second substrate (730) may be about 50 µm to about 100 µm. Specifically, the thickness of the second substrate (730) may be about 60 µm to about 90 µm. If the thickness of the second substrate (730) is less than about 50 µm, it may be difficult to effectively protect the light transmission control layer (700). Also, if the thickness of the second substrate (730) exceeds about 100 µm, the total thickness of the light transmission control layer (700) may increase, and as a result, it may be difficult to provide the lighting device (1000) slimly. That is, the second material (730) is a layer placed on the outermost side of the light transmission control layer (700) and can perform the function of a protective layer by satisfying the thickness range described above.

[0116] Additionally, the light transmission control layer (700) may further include a second adhesive layer (740). The second adhesive layer (740) may be disposed between the first substrate (710) and the second substrate (730). The second adhesive layer (740) may include a light-transmitting adhesive material. The second adhesive layer (740) may bond the first substrate (710) and the second substrate (730).

[0118] The light transmission control layer (700) may include a transmission region (TA) and a non-transmission region (UA). The transmission region (TA) may be an area where the pattern particles (721) are not placed and may be an area capable of transmitting light emitted from the light-emitting element (200). Additionally, the non-transmission region (UA) may be an area where the pattern particles (721) are placed and may be an area where light emitted from the light-emitting element (200) cannot be transmitted.

[0119] At this time, the above-mentioned non-transmitting area (UA) may be provided as an area set to control the transmittance of emitted light and to provide a metallic feel when the lighting device (1000) is off.

[0120] For example, in the light transmission control layer (700), the area of ​​the non-transmitting region (UA) may be larger than the area of ​​the transmitting region (TA). That is, the planar area of ​​the pattern particle (721) placed on the first substrate (710) may be larger than the planar area of ​​the region where the pattern particle (721) is not placed. Here, the planar area refers to the planar area occupied when viewed from a plane or from the top in a vertical direction (z-axis direction).

[0121] The planar area of ​​the above non-transmitting region (UA) may be about 85% to about 95% of the total planar area of ​​the light transmission control layer (700). Specifically, the planar area of ​​the above non-transmitting region (UA) may be about 90% to about 95% of the total planar area of ​​the light transmission control layer (700).

[0122] If the planar area of ​​the non-transmitting region (UA) is less than about 85%, the area of ​​the transmitting region (TA) increases, and the overall brightness of the lighting device (1000) may increase. However, when the lighting device (1000) is viewed from the outside when power is not applied (not emitting light, Off state), it may be difficult to provide a continuous and natural metallic feel on the surface of the lighting device (1000). Additionally, if the planar area of ​​the non-transmitting region (UA) exceeds about 95%, a metallic feel can be effectively provided when the lighting device (1000) is not emitting light. However, if the area of ​​the transmitting region (TA) is too small, the overall brightness of the lighting device (1000) and the uniformity characteristics of the emitted light may be degraded.

[0124] That is, the total thickness of the light transmission control layer (700) according to the embodiment may be about 300 μm or less. Specifically, the total thickness of the light transmission control layer (700) may be about 100 μm to about 250 μm. More specifically, the total thickness of the light transmission control layer (700) including the first substrate (710), the pattern layer (720), the second substrate (730), and the second adhesive layer (740) may be about 120 μm to about 250 μm, taking into account the brightness and uniformity of the light emitted through the light transmission control layer (700), as well as the reliability and slim characteristics of the light transmission control layer (700).

[0125] Additionally, the lighting device (1000) according to the embodiment may include a light transmission control layer (700) comprising a non-transmitting area (UA) in which pattern particles (721) are placed and a transmitting area (TA) in which the pattern particles (721) are not placed. At this time, the pattern particles (721) may have a thickness within a set range, and the non-transmitting area (UA) and the transmitting area (TA) may have a set planar shape.

[0126] Accordingly, when the lighting device (1000) emits light (On state), the light emitted from the light-emitting element (200) is emitted through the transmission area (TA) and the non-transmission area (UA), and can provide light with excellent brightness and uniformity to the outside. In addition, when the lighting device (1000) does not emit light (Off state), the surface of the lighting device (1000) can provide a metallic feel, for example, a feel of the material of the pattern particle (721).

[0127] Accordingly, the lighting device (1000) according to the embodiment can control the transmittance of emitted light while minimizing loss of brightness and uniformity, and can provide a surface that has a natural metallic feel when not emitting light.

[0129] The lighting device (1000) according to the embodiment may further include a printed layer (800). The printed layer (800) may be disposed on the diffusion layer (600). The printed layer (800) may be disposed on the light transmission control layer (700). The printed layer (800) may be disposed on the top of the lighting device (1000).

[0130] The printed layer (800) may include a metallic or non-metallic material. The printed layer (800) may include a light-absorbing material or a light-reflecting material. The printed layer (800) may absorb or reflect visible light, infrared light, or some ultraviolet light. For example, the printed layer (800) may absorb or reflect light in the wavelength range of about 380 nm to about 800 nm.

[0131] The above-mentioned printing layer (800) can be implemented using colored ink. For example, the above-mentioned printing layer (800) may be black ink or a black printing layer. Additionally, the above-mentioned printing layer (800) may be a light-absorbing material containing carbon or carbon nanotubes, or a black resist material or a black matrix material. The above-mentioned printing layer (800) can block light emitted from the light-emitting element (200), such as light emitted through the light transmission control layer (700).

[0132] The above-mentioned printing layer (800) can be placed at a set position. For example, when viewed from above, the printing layer (800) has a set shape such as a logo, emblem, text, or icon, and can be placed at a position for implementing such shape. Accordingly, the printing layer (800) can control the shape of the light emitted through the diffusion layer (600).

[0133] For example, when the lighting device (1000) emits light, the light emitted from the light-emitting element (200) can be emitted in an upward direction through the light transmission control layer (700). At this time, the light emitted through the light transmission control layer (700) can be emitted through an area where the printing layer (800) is not placed, and may not be emitted into an area that overlaps vertically with the printing layer (800). Therefore, the shape of the light emitted from an area other than the printing layer (800) can be seen from the outside. In addition, when the lighting device (1000) does not emit light, the shape of the printing layer (800) can be seen from the outside, and the surface of the area of ​​the lighting device (1000) where the printing layer (800) is not placed can provide a metallic feel, for example, a feel of the material of the pattern particle (721). Therefore, the lighting device (1000) according to the embodiment can have enhanced aesthetic and design freedom characteristics.

[0135] FIG. 5 is another cross-sectional view of a lighting device according to an embodiment. In the description using FIG. 5, descriptions of configurations identical or similar to the lighting device described above are omitted, and identical or similar configurations are given the same reference numerals.

[0136] Referring to FIG. 5, a lighting device (1000) according to an embodiment may include a light-blocking layer (500) disposed on the resin layer (400). The light-blocking layer (500) may be disposed on the upper surface of the resin layer (400). The light-blocking layer (500) may be disposed on the entire or a portion of the upper surface of the resin layer (400).

[0137] In the lighting device (1000) according to FIG. 5, the light-transmitting substrate (510) of the light-blocking layer (500) may be omitted compared to the lighting device (1000) of FIG. 1 to FIG. 4 described above. Specifically, in the case of the lighting device (1000) described above, the light-blocking pattern (520) is formed on one surface of the light-transmitting substrate (510). Additionally, the light-blocking layer (500) is bonded to the resin layer (400) via the first adhesive layer (520) disposed around the light-blocking pattern (520).

[0138] However, in the lighting device (1000) according to FIG. 5, the light-blocking pattern (520) may be formed on the upper surface of the resin layer (400). The light-blocking pattern (520) may be formed directly on the upper surface of the resin layer (400). The light-blocking pattern (520) may be placed between the resin layer (400) and the diffusion layer (600).

[0139] The light-blocking pattern (520) may be placed on a portion of the upper surface of the resin layer (400). The light-blocking pattern (520) may be printed by overlapping a plurality of layers on the upper surface of the resin layer (400). Additionally, the light-blocking pattern (520) may have a structure including a plurality of patterns having different sizes. The light-blocking pattern (520) may have a protruding shape on the upper surface of the resin layer (400). The upper surface of the light-blocking pattern (520) may be placed above the upper surface of the resin layer (400).

[0140] The light-blocking pattern (520) may be provided in a number greater than or equal to the number of light-emitting elements (200). Additionally, the light-blocking pattern (520) may be placed in an area corresponding to the light-emitting element (200). Specifically, a portion of the light-blocking pattern (520) may overlap with the light-emitting element (200) in a vertical direction (z-axis direction).

[0141] The first adhesive layer (520) may be placed around the perimeter of the light-blocking pattern (520). The first adhesive layer (520) may be placed between the resin layer (400) and the diffusion layer (600). The first adhesive layer (520) may be placed in an area of ​​the upper surface of the resin layer (400) where the light-blocking pattern (520) is not placed. The first adhesive layer (520) may include a light-transmitting adhesive material. The first adhesive layer (520) may bond the resin layer (400) and the diffusion layer (600).

[0142] Accordingly, the lighting device (1000) according to the embodiment may have a slimmer structure by omitting some components. In addition, the brightness uniformity characteristics can be improved by the light-blocking pattern (520), and the formation of a hot spot by the light emitted from the light-emitting element (200) can be prevented.

[0144] FIG. 6 is another cross-sectional view of a lighting device according to an embodiment. In the description using FIG. 6, descriptions of configurations identical or similar to the lighting device described above are omitted, and identical or similar configurations are given the same reference numerals.

[0145] Referring to FIG. 6, the resin layer (400) may include a first recess (R1). The first recess (R1) may be formed on the upper surface of the resin layer (400). The first recess (R1) may have a concave shape in the direction of the lower surface from the upper surface of the resin layer (400). The first recess (R1) may be provided in a number greater than or equal to that of the light-emitting element (200). Additionally, the first recess (R1) may be placed in an area corresponding to the light-emitting element (200). Specifically, a portion of the first recess (R1) may overlap with the light-emitting element (200) in a vertical direction (z-axis direction).

[0146] When the first recess (R1) is viewed from above, the planar shape of the first recess (R1) may have various shapes such as a circle, an ellipse, or a polygon. For example, the planar shape of the first recess (R1) may have a shape that includes a curve, taking into account the emission direction and directional angle of the light-emitting element (200), and may have a shape that extends along the emission direction of the light-emitting element (200).

[0147] Additionally, when the first recess (R1) is viewed from above, the horizontal width of the first recess (R1) may be greater than the horizontal width of the light-emitting element (200). For example, the light-emitting surface of the light-emitting element (200) may face the first direction, and the length of the second direction (y-axis direction) of the element may be longer than the length of the first direction (x-axis direction). In this case, the width of the first direction of the first recess (R1) may be greater than the length of the first direction of the light-emitting element (200). Additionally, the width of the second direction of the first recess (R1) may be greater than the length of the second direction of the light-emitting element (200).

[0149] A light-blocking layer (500) including a light-blocking pattern (520) may be disposed on the resin layer (400). The light-blocking pattern (520) may be formed on the upper surface of the resin layer (400). The light-blocking pattern (520) may be in direct contact with the upper surface of the resin layer (400). The light-blocking pattern (520) may be disposed within the first recess (R1). The light-blocking pattern (520) may be disposed between the resin layer (400) and the diffusion layer (600). The light-blocking pattern (520) may be printed by overlapping a plurality of layers on the first recess (R1). Additionally, the light-blocking pattern (520) may have a structure including a plurality of patterns having different sizes.

[0150] When the light-blocking pattern (520) is viewed from above, the planar shape of the light-blocking pattern (520) may have a shape corresponding to the first recess (R1). For example, the planar shape of the light-blocking pattern (520) may have various shapes such as a circle, ellipse, or polygon, identical to the first recess (R1). The planar shape of the light-blocking pattern (520) may have a shape that includes a curve, taking into account the emission direction and directional angle of the light-emitting element (200), and may have a shape that extends along the emission direction of the light-emitting element (200).

[0151] Additionally, when the light-blocking pattern (520) is viewed from above, the horizontal width of the light-blocking pattern (520) may correspond to the horizontal width of the first recess (R1). Accordingly, the horizontal width of the light-blocking pattern (520) may be greater than the horizontal width of the light-emitting element (200). For example, the light-emitting surface of the light-emitting element (200) may face the first direction, and the length of the second direction (y-axis direction) of the element may be longer than the length of the first direction (x-axis direction). In this case, the width of the first direction of the light-blocking pattern (520) may be greater than the length of the first direction of the light-emitting element (200). Additionally, the width of the second direction of the light-blocking pattern (520) may be greater than the length of the second direction of the light-emitting element (200).

[0152] Additionally, the light-blocking pattern (520) may not protrude from the uppermost surface of the resin layer (400). That is, the height (z-axis direction) of the light-blocking pattern (520) may be greater or lower than the depth (z-axis direction) of the first recess (R1). Accordingly, the uppermost surface of the light-blocking pattern (520) may be positioned below the uppermost surface of the resin layer (400) or positioned on the same plane as the uppermost surface of the resin layer (400).

[0153] Accordingly, the lighting device (1000) according to FIG. 6 may omit the first adhesive layer (520). Specifically, the lighting device (1000) according to FIG. 6 may have the light-blocking pattern (520) disposed within the first recess (R1) of the resin layer (400) so as not to protrude above the uppermost surface of the resin layer (400). As a result, the resin layer (400) may adhere to a configuration disposed on top thereof, such as the diffusion layer (600), without a separate adhesive layer.

[0154] Accordingly, the lighting device (1000) according to the embodiment may have a slimmer structure by omitting some components. In addition, the brightness uniformity characteristics can be improved by the light-blocking pattern (520), and the formation of a hot spot by the light emitted from the light-emitting element (200) can be prevented.

[0156] FIG. 7 is another cross-sectional view of a lighting device according to an embodiment. In the description using FIG. 7, descriptions of configurations identical or similar to the lighting device described above are omitted, and identical or similar configurations are given the same reference numerals.

[0157] Referring to FIG. 7, a lighting device (1000) according to an embodiment may include a second reflective layer (900). The second reflective layer (900) may be disposed between the light-blocking layer (500) and the diffusion layer (600).

[0158] The second reflective layer (900) may be disposed on an area corresponding to a portion of the upper surface of the light-blocking layer (500). The second reflective layer (900) may be provided as a flat surface smaller than the upper surface of the light-blocking layer (500).

[0159] The second reflective layer (900) may include a metallic material or a non-metallic material. The metallic material may include metals such as aluminum, silver, and gold. The non-metallic material may include a plastic material or a resin material. The plastic material may be any one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polychlorinated biphenyl, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polybutylene terephthalate, polyethylene naphthalate, polyamide, polyacetal, polyphenylene ether, polyamideimide, polyetherimide, polyetheretherketone, polyimide, polytetrafluoroethylene, liquid crystal polymer, fluoropolymer, copolymers thereof, and mixtures thereof. The resin material may have a reflective material, such as a metal oxide such as TiO2, Al2O3, or SiO2, added to silicone or epoxy. The second reflective layer (900) can be implemented as a single layer or multiple layers, and the light reflection efficiency can be improved by such a layer structure.

[0160] Additionally, the second reflective layer (900) may include a plurality of reflectors (not shown). The reflectors may be bubbles such as air, or a medium having the same refractive index as air. The second reflective layer (900) may reflect incident light or refract it in a different direction by the plurality of reflectors.

[0161] The second reflective layer (900) may be placed in a set area. The second reflective layer (900) may be placed in an area that does not correspond to the light-blocking pattern (520). For example, the second reflective layer (900) may be placed in an area that does not overlap with the light-blocking pattern (520) in a vertical direction. Additionally, the second reflective layer (900) may be placed in an area corresponding to the printing layer (800). Specifically, the second reflective layer (900) may be placed in an area that overlaps with the printing layer (800) in a vertical direction.

[0162] The second reflective layer (900) may have a shape corresponding to the printed layer (800). For example, the second reflective layer (900) may have an upper shape corresponding to the printed layer (800). That is, the second reflective layer (900) may have a set shape such as a logo, emblem, text, or icon identical to that of the printed layer (800).

[0163] Additionally, when the second reflective layer (900) is viewed from above, the horizontal width of the second reflective layer (900) may be smaller than or equal to the horizontal width of the printing layer (800). Specifically, the horizontal width of the second reflective layer (900) may be approximately 80% or more and 100% or less of the horizontal width of the printing layer (800). If the horizontal width of the second reflective layer (900) is less than approximately 80% of the horizontal width of the printing layer (800), the amount of light provided to the printing layer (800) may increase, and the amount of light provided to the non-transmitting area (UA) may decrease. Additionally, if the horizontal width of the second reflective layer (900) is greater than the horizontal width of the printing layer (800) (exceeding 100%), the amount of light provided to the non-transmitting area adjacent to the edge of the printing layer (800) may decrease. Accordingly, the uniformity characteristics of light emitted from the border area of ​​the printed layer (800) and the area spaced apart from the printed layer (800) may be degraded. Therefore, it is desirable that the horizontal width of the second reflective layer (900) satisfies the range described above.

[0164] A second adhesive layer (740) may be disposed around the second reflective layer (900). The second adhesive layer (740) may be disposed around the second reflective layer (900). The second adhesive layer (740) may be disposed between the light-blocking layer (500) and the diffusion layer (600). The second adhesive layer (740) may be disposed in an area between the light-blocking layer (500) and the diffusion layer (600) where the second reflective layer (900) is not disposed. The second adhesive layer (740) may include a light-transmitting adhesive material. The second adhesive layer (740) may bond the light-blocking layer (500) and the diffusion layer (600).

[0165] That is, the lighting device (1000) according to the embodiment may include a second reflective layer (900) disposed in the upper region of the resin layer (400) corresponding to the printing layer (800). At this time, the second reflective layer (900) can reflect light incident in the direction of the printing layer (800) in the direction of the resin layer (400), thereby preventing or minimizing the reduction of the amount of light provided to the non-transmitting region (UA) by the printing layer (800). In addition, the amount of light can be increased so that the light emitted through the lighting device (1000) has a uniform distribution.

[0167] FIG. 8 is another cross-sectional view of a lighting device according to an embodiment. In the description using FIG. 8, descriptions of configurations identical or similar to the lighting device described above are omitted, and identical or similar configurations are given the same reference numerals.

[0168] Referring to FIG. 8, a lighting device (1000) according to an embodiment may include a light-blocking pattern (520) formed on the upper surface of the resin layer (400). The light-blocking pattern (520) may be formed directly on the upper surface of the resin layer (400). The light-blocking pattern (520) may be disposed between the resin layer (400) and the diffusion layer (600).

[0169] The light-blocking pattern (520) may be placed on a portion of the upper surface of the resin layer (400). The light-blocking pattern (520) may be printed by overlapping a plurality of layers on the upper surface of the resin layer (400). Additionally, the light-blocking pattern (520) may have a structure including a plurality of patterns having different sizes. The light-blocking pattern (520) may have a protruding shape on the upper surface of the resin layer (400). The upper surface of the light-blocking pattern (520) may be placed above the upper surface of the resin layer (400).

[0170] The light-blocking pattern (520) may be provided in a number greater than or equal to the number of light-emitting elements (200). Additionally, the light-blocking pattern (520) may be placed in an area corresponding to the light-emitting element (200). Specifically, a portion of the light-blocking pattern (520) may overlap with the light-emitting element (200) in a vertical direction (z-axis direction).

[0172] The lighting device (1000) may include a second reflective layer (900) disposed on the upper surface of the resin layer (400). The second reflective layer (900) may be disposed between the resin layer (400) and the diffusion layer (600).

[0173] The second reflective layer (900) may be placed in an area that does not correspond to the light-blocking pattern (520). For example, the second reflective layer (900) may be placed in an area that does not overlap with the light-blocking pattern (520) in a vertical direction. Additionally, the second reflective layer (900) may be placed in an area corresponding to the printing layer (800). Specifically, the second reflective layer (900) may be placed in an area that overlaps with the printing layer (800) in a vertical direction.

[0174] Additionally, the second reflective layer (900) may have a shape corresponding to the printed layer (800). For example, the second reflective layer (900) may have an upper shape corresponding to the printed layer (800). That is, the second reflective layer (900) may have a set shape, such as a logo, emblem, text, or icon, identical to that of the printed layer (800).

[0175] Additionally, when the second reflective layer (900) is viewed from above, the horizontal width of the second reflective layer (900) may be smaller than or equal to the horizontal width of the printing layer (800). Specifically, the horizontal width of the second reflective layer (900) may be approximately 80% or more and 100% or less of the horizontal width of the printing layer (800).

[0177] A first adhesive layer (520) may be disposed around the light-blocking pattern (520) and the second reflective layer (900). The first adhesive layer (520) may be disposed around the light-blocking pattern (520) and the second reflective layer (900). The first adhesive layer (520) may be disposed between the resin layer (400) and the diffusion layer (600). The first adhesive layer (520) may be disposed in an area between the resin layer (400) and the diffusion layer (600) where the light-blocking pattern (520) and the second reflective layer (900) are not disposed. The first adhesive layer (520) may include a light-transmitting adhesive material. The first adhesive layer (520) may bond the resin layer (400) and the diffusion layer (600).

[0179] That is, the lighting device (1000) according to the embodiment may have a slimmer structure by omitting some components. In addition, the brightness uniformity characteristics can be improved by the light-blocking pattern (520), and the formation of a hot spot by the light emitted from the light-emitting element (200) can be prevented.

[0180] Additionally, the lighting device (1000) may include a second reflective layer (900) disposed in an area corresponding to the printing layer (800). In this case, the second reflective layer (900) can reflect light incident in the direction of the printing layer (800) toward the direction of the resin layer (400), thereby preventing or minimizing a reduction in the amount of light provided to the non-transmitting area (UA) by the printing layer (800). Furthermore, the placement of the second reflective layer (900) can increase the amount of light so that the light emitted through the lighting device (1000) has a uniform distribution.

[0182] FIG. 9 is another cross-sectional view of a lighting device according to an embodiment. In the description using FIG. 9, descriptions of configurations identical or similar to the lighting device described above are omitted, and identical or similar configurations are given the same reference numerals.

[0183] Referring to FIG. 9, the resin layer (400) may include a plurality of recesses. The plurality of recesses may include a first recess (R1) and a second recess (R2) formed on the upper surface of the resin layer (400). The first recess (R1) and the second recess (R2) may have a concave shape in the direction of the lower surface from the upper surface of the resin layer (400).

[0184] The first recess (R1) may be provided in a number greater than or equal to the number of light-emitting elements (200). Additionally, the first recess (R1) may be placed in an area corresponding to the light-emitting element (200). Specifically, a portion of the first recess (R1) may overlap with the light-emitting element (200) in a vertical direction (z-axis direction).

[0185] When the first recess (R1) is viewed from above, the planar shape of the first recess (R1) may have various shapes such as a circle, an ellipse, or a polygon. For example, the planar shape of the first recess (R1) may have a shape that includes a curve, taking into account the emission direction and directional angle of the light-emitting element (200), and may have a shape that extends along the emission direction of the light-emitting element (200).

[0186] Additionally, when the first recess (R1) is viewed from above, the horizontal width of the first recess (R1) may be greater than the horizontal width of the light-emitting element (200). For example, the light-emitting surface of the light-emitting element (200) may face the first direction, and the length of the second direction (y-axis direction) of the element may be longer than the length of the first direction (x-axis direction). In this case, the width of the first direction of the first recess (R1) may be greater than the length of the first direction of the light-emitting element (200). Additionally, the width of the second direction of the first recess (R1) may be greater than the length of the second direction of the light-emitting element (200).

[0188] The second recess (R2) may be spaced apart from the first recess (R1). The second recess (R2) may be placed in an area that does not overlap with the first recess (R1) in a vertical direction. Additionally, the second recess (R2) may be placed in an area corresponding to the printing layer (800). Specifically, the second recess (R2) may be placed in an area that overlaps with the printing layer (800) in a vertical direction.

[0189] The second recess (R2) may have a shape corresponding to the printed layer (800). For example, the second recess (R2) may have an upper shape corresponding to the printed layer (800). That is, the second recess (R2) may have a set shape such as a logo, emblem, text, or icon identical to the printed layer (800).

[0190] Additionally, when the second recess (R2) is viewed from above, the horizontal width of the second recess (R2) may be smaller than or equal to the horizontal width of the printed layer (800). Specifically, the horizontal width of the second recess (R2) may be approximately 80% or more and 100% or less of the horizontal width of the printed layer (800).

[0191] If the horizontal width of the second recess (R2) is less than about 80% of the horizontal width of the printing layer (800), the horizontal width of the second reflective layer (900) placed within the second recess (R2) is small, and as a result, the amount of light provided to the printing layer (800) increases, and the amount of light provided to the non-transmitting area (UA) may decrease.

[0192] Additionally, if the horizontal width of the second recess (R2) is greater than the horizontal width of the printing layer (800) (exceeding 100%), the horizontal width of the second reflective layer (900) placed within the second recess (R2) may be excessively large. As a result, the amount of light provided to the non-transmitting area adjacent to the edge of the printing layer (800) may be reduced. Consequently, the uniformity characteristics of the light emitted from the edge area of ​​the printing layer (800) and the area spaced apart from the printing layer (800) may be degraded. Therefore, it is desirable for the horizontal width of the second recess (R2) to satisfy the aforementioned range by taking into account the width of the second reflective layer (900) placed inside.

[0194] A light-blocking layer (500) including a light-blocking pattern (520) may be disposed on the resin layer (400). The light-blocking pattern (520) may be formed on the upper surface of the resin layer (400). The light-blocking pattern (520) may be in direct contact with the upper surface of the resin layer (400). The light-blocking pattern (520) may be disposed within the first recess (R1). The light-blocking pattern (520) may be disposed between the resin layer (400) and the diffusion layer (600).

[0195] The light-blocking pattern (520) may have a shape and size corresponding to the first recess (R1). For example, when viewed from above, the light-blocking pattern (520) may have the same planar shape as the first recess (R1). Additionally, the light-blocking pattern (520) may have a horizontal width corresponding to the first recess (R1). Specifically, the horizontal width of the light-blocking pattern (520) may be the same as that of the first recess (R1). Accordingly, the light-blocking pattern (520) may come into direct contact with the inner surface of the first recess (R1).

[0196] The light-blocking pattern (520) may not protrude from the uppermost surface of the resin layer (400). That is, the height (z-axis direction) of the light-blocking pattern (520) may be greater or lower than the depth (z-axis direction) of the first recess (R1). Accordingly, the uppermost surface of the light-blocking pattern (520) may be positioned below the uppermost surface of the resin layer (400) or positioned on the same plane as the uppermost surface of the resin layer (400).

[0198] The second reflective layer (900) may be disposed on the resin layer (400). The second reflective layer (900) may be disposed on the upper surface of the resin layer (400). The second reflective layer (900) may be in direct contact with the upper surface of the resin layer (400). The second reflective layer (900) may be disposed within the second recess (R2). The second reflective layer (900) may be disposed between the resin layer (400) and the diffusion layer (600).

[0199] The second reflective layer (900) may be placed in an area that does not correspond to the light-blocking pattern (520). For example, the second reflective layer (900) may be placed in an area that does not overlap with the light-blocking pattern (520) in a vertical direction. Additionally, the second reflective layer (900) may be placed in an area corresponding to the printing layer (800). Specifically, the second reflective layer (900) may be placed in an area that overlaps with the printing layer (800) in a vertical direction.

[0200] The second reflective layer (900) may have a shape and size corresponding to the second recess (R2). Accordingly, the second reflective layer (900) may have a shape corresponding to the printed layer (800). For example, the second reflective layer (900) may have an upper shape corresponding to the printed layer (800). That is, the second reflective layer (900) may have a set shape such as a logo, emblem, text, or icon identical to that of the printed layer (800).

[0201] The second reflective layer (900) may have a horizontal width corresponding to the second recess (R2). Specifically, the horizontal width of the second reflective layer (900) may be the same as that of the second recess (R2). Accordingly, the second reflective layer (900) may come into direct contact with the inner surface of the second recess (R2).

[0202] The second reflective layer (900) may not protrude from the uppermost surface of the resin layer (400). That is, the height (z-axis direction) of the second reflective layer (900) may be greater or lower than the depth (z-axis direction) of the second recess (R2). Accordingly, the uppermost surface of the second reflective layer (900) may be positioned below the uppermost surface of the resin layer (400) or positioned on the same plane as the uppermost surface of the resin layer (400).

[0203] That is, the lighting device (1000) according to the embodiment may have a slimmer structure by omitting some components. In addition, the brightness uniformity characteristics can be improved by the light-blocking pattern (520), and the formation of a hot spot by the light emitted from the light-emitting element (200) can be prevented.

[0204] Additionally, the lighting device (1000) may include a second reflective layer (900) disposed in an area corresponding to the printing layer (800). In this case, the second reflective layer (900) can reflect light incident in the direction of the printing layer (800) toward the direction of the resin layer (400), thereby preventing or minimizing a reduction in the amount of light provided to the non-transmitting area (UA) by the printing layer (800). Furthermore, the placement of the second reflective layer (900) can increase the amount of light so that the light emitted through the lighting device (1000) has a uniform distribution.

[0206] FIG. 10 is a diagram illustrating the light transmittance according to the area of ​​the transmitting region and the non-transmitting region of the light transmission control layer in a lighting device according to an example and a comparative example, and FIG. 11 is data on the brightness uniformity of the lighting device according to an example.

[0207] The operation and effects of the present invention will be explained in more detail below through comparative examples and embodiments.

[0209] Comparative Example 1

[0210] A lighting device was manufactured by arranging a light-emitting element, a resin layer, a light-blocking layer, and a diffusion layer on a substrate, and arranging a light transmission control layer on the diffusion layer.

[0211] The light transmission control layer comprises a first substrate, pattern particles disposed on one side of the first substrate, a second substrate disposed on the other side of the first substrate, and an adhesive layer disposed between the first and second substrates. At this time, the first substrate is provided as a PET material with a thickness of about 25 μm, and the second substrate is provided as a PMMA material with a thickness of about 75 μm. Additionally, the pattern particles include at least one metal among Al, Cr, and SUS, and are formed on the first substrate with a thickness of about 2 μm to 10 μm.

[0212] The light transmission control layer includes a transmission area where the pattern particles are not placed and a non-transmission area where the pattern particles are placed. The lighting device according to Comparative Example 1 formed the light transmission control layer such that the planar area of ​​the transmission area satisfies at least 10% of the total planar area of ​​the light transmission control layer, as shown in FIG. 10(a). More specifically, the light transmission control layer was formed such that the planar area of ​​the transmission area satisfies at least about 15% of the total planar area of ​​the light transmission control layer.

[0214] Comparative Example 2

[0215] A lighting device was manufactured by arranging a light-emitting element, a resin layer, a light-blocking layer, and a diffusion layer on a substrate in the same manner as Comparative Example 1, and arranging a light transmission control layer on the diffusion layer.

[0216] At this time, the light transmission control layer is formed such that the planar area of ​​the transmission area is less than about 5% of the total planar area of ​​the light transmission control layer, as shown in FIG. 10(c).

[0218] Examples

[0219] A lighting device was manufactured by arranging a light-emitting element, a resin layer, a light-blocking layer, and a diffusion layer on a substrate in the same manner as Comparative Example 1 and Comparative Example 2, and arranging a light transmission control layer on the diffusion layer.

[0220] At this time, the light transmission control layer is formed such that the planar area of ​​the transmission area is about 5% to about 10% of the total planar area of ​​the light transmission control layer, as shown in FIG. 10(b).

[0222] Referring to FIG. 10, the lighting device according to Comparative Example 1 has a relatively larger area of ​​the transmission region (TA) compared to the lighting device (1000) according to the embodiment, so the overall brightness increased. However, when power is not applied to the lighting device, there was a problem in that it was difficult to provide a continuous and natural metallic feel on the surface of the lighting device. In addition, the lighting device according to Comparative Example 2 could provide a continuous and natural metallic feel on the surface of the lighting device when power is not applied, but there was a problem in that it was difficult to provide overall brightness and uniform light because the area of ​​the transmission region (TA) was relatively small.

[0223] However, referring to FIG. 10 and FIG. 11, the lighting device (1000) according to the embodiment may satisfy a planar area of ​​the transparent region (TA) of about 5% to about 10%, and a planar area of ​​the non-transparent region (UA) of about 90% to about 95%. In this case, the light transmission control layer (700) may have a light transmittance of about 7.04% and a haze characteristic of about 24.2%.

[0224] Additionally, referring to FIG. 11, it can be seen that the light emitted from the lighting device (1000) according to the embodiment has excellent uniformity characteristics. In this case, the X-axis of FIG. 11 represents distance in terms of the number of pixels of a measuring instrument that measures the uniformity of light, and the Y-axis represents luminance (cd / m²). 2 ...represents. Specifically, the lighting device (1000) according to the embodiment includes a plurality of light-emitting elements (200) that emit light in the lateral direction of the resin layer (400), and it can be seen that the light emitted through the upper surface of the light transmission control layer (700) has a uniformity of about 60% or more depending on the position.

[0225] Accordingly, when the lighting device (1000) according to the embodiment emits light (On state), it is emitted through the light transmission control layer (700) and can provide light with excellent brightness and uniformity to the outside. In addition, when the lighting device (1000) does not emit light (Off state), the surface of the lighting device (1000) can provide a metallic feel.

[0226] Accordingly, the lighting device (1000) according to the embodiment can control the transmittance of emitted light while minimizing loss of brightness and uniformity, and can provide a surface that has a natural metallic feel when not emitting light.

[0228] FIGS. 12 and FIGS. 13 are drawings illustrating an example in which a lamp including a lighting device according to an embodiment is applied to a vehicle.

[0229] FIG. 12 is a front view of a vehicle having a lamp having a lighting device according to an embodiment, and FIG. 13 is a drawing illustrating an example in which the lamp having the lighting device is applied to a logo, such as an emblem, located on the exterior of the vehicle.

[0230] Referring to FIGS. 12 and 13, a lighting device (1000) according to an embodiment can be applied to a vehicle (2000). One or more lamps may be placed at least in the front, rear, side, and top of the vehicle (2000).

[0231] For example, the lamp may be applied to the front lamp of the vehicle (2000). In this case, the lighting device (1000) may provide at least one function among a headlight, turn signal, daytime running light, high beam, low beam, and fog light through the light emission of the lighting device (1000). Additionally, the front lamp may provide additional functions such as a welcome light or a celebration effect when the driver opens the vehicle door.

[0232] Additionally, the lamp may be applied to the rear lamp of the vehicle (2000). In this case, the lighting device (1000) may provide at least one function among a parking light, a brake light, and a turn signal by the light emitted by the lighting device (1000).

[0233] Additionally, the lamp may be applied to the emblem lamp (2100) of the vehicle (2000). The emblem lamp (2100) may be provided in at least one area among the front (2010), side, and rear of the vehicle (2000). For example, the emblem lamp (2100) may be provided in the front (2010) of the vehicle (2000). The emblem lamp (2100) may be placed in the central area of ​​the front (2010) of the vehicle (2000), such as the radiator grille, bonnet, etc. of the vehicle (2000). In the embodiment, the emblem lamp (2100) is described as being located at the front (2010) of the vehicle (2000), but is not limited thereto, and the emblem lamp (2100) may be placed on various exteriors of the vehicle (2000) or inside the vehicle (2000).

[0234] The above emblem lamp (2100) can control the operation of the above lighting device (1000) to provide light of a shape corresponding to the emblem.

[0235] For example, as shown in FIG. 13(a), the lighting device (1000) may not emit light (Off state). In this case, the printed layer (800) of the lighting device (1000) may be visible from the outer front (2010) of the vehicle (2000). At this time, the printed layer (800) may be arranged in the shape of an emblem symbolizing the manufacturer, brand, logo, etc. of the vehicle (2000). In addition, in the above case (Off state), the area of ​​the lighting device (1000) other than the printed layer (800) may be provided with a metallic-feeling surface having a color corresponding to the front (2010) of the vehicle (2000). Accordingly, the emblem lamp (2100) may be minimized or prevented from being visible from the outside, thereby having a hidden effect.

[0236] Additionally, as shown in FIG. 13(b), the lighting device (1000) can emit light (On state). In this case, the light emitted through the transmission area (TA) of the lighting device (1000) and the printed layer (800) can be seen at the outer front (2010) of the vehicle (2000). At this time, the lighting device (1000) can emit light having the shape of the emblem as it has a shape corresponding to the emblem, and can provide light with excellent brightness and uniformity to the outside.

[0238] The features, structures, effects, etc. described in the embodiments above are included in at least one embodiment of the present invention and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. exemplified in each embodiment may be combined or modified and implemented in other embodiments by a person skilled in the art to which the embodiments belong. Therefore, details regarding such combinations and modifications should be interpreted as being included within the scope of the present invention.

[0239] Furthermore, although the invention has been described above with reference to embodiments, this is merely illustrative and does not limit the invention. Those 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 example, each component specifically shown in the embodiments may be modified and implemented. Differences related to such modifications and applications should be interpreted as being included within the scope of the invention as defined in the appended claims. Explanation of the symbols

[0240] Lighting device: 1000 Substrate: 110 Light-emitting element: 200 First reflective layer: 300 Resin layer: 400 Shade layer: 500 Diffusion layer: 600 Light transmission control layer: 700

Claims

Claim 1 A lighting device comprising: a substrate; a light-emitting element disposed on the substrate; a resin layer disposed on the substrate to cover the light-emitting element; and a diffusion layer disposed on the resin layer, wherein the resin layer includes a first recess and a light-blocking pattern disposed within the first recess. Claim 2 In claim 1, the lighting device, wherein the first recess is formed on the upper surface of the resin layer. Claim 3 A lighting device according to claim 1, wherein the first recess is greater than or equal to the number of light-emitting elements. Claim 4 A lighting device according to claim 1, wherein the horizontal width of the first recess is greater than the horizontal width of the light-emitting element. Claim 5 A lighting device according to claim 1, wherein the first recess overlaps vertically with the light-emitting element. Claim 6 A lighting device according to claim 1, wherein the light-blocking pattern comprises a plurality of patterns having different sizes. Claim 7 A lighting device according to paragraph 2, wherein the uppermost surface of the light-blocking pattern is positioned at the same level as or lower than the uppermost surface of the resin layer. Claim 8 In claim 7, a lighting device in which the thickness of the light-blocking pattern is smaller than the depth of the first recess. Claim 9 A lighting device according to claim 1, wherein the resin layer further comprises a second recess spaced apart from the first recess, and a reflective layer disposed within the second recess. Claim 10 In claim 9, the lighting device wherein the second recess does not overlap perpendicularly with the first recess. Claim 11 In item 10, the lighting device, wherein the second recess is formed at the same height as the first recess. Claim 12 A lighting device according to claim 9, further comprising a printing layer disposed on the diffusion layer, wherein the printing layer has the shape of at least one of a logo, an emblem, a phrase, or an icon. Claim 13 In paragraph 12, the lighting device, wherein the second recess is vertically superimposed with the printed layer. Claim 14 In paragraph 13, the lighting device, wherein the reflective layer has the same shape as the printed layer. Claim 15 A lighting device according to claim 12, wherein the horizontal width of the second recess is 80% to 100% of the horizontal width of the printed layer.

Images