Lighting device and lamp comprising a lighting device

Abstract

Disclosed according to an embodiment is a lighting device, comprising: a substrate; a plurality of light emitting devices disposed on the substrate; a first reflective layer arranged on the substrate; a resin layer located on the first reflective layer; and a second reflective layer located on the resin layer, wherein the resin layer comprises a first side surface facing a light emitting surface of the plurality of light emitting devices, and a second side surface opposite to the first side surface, the first side surface comprises a plurality of first reflective surfaces having a convex shape relative to the light emitting surface of the light emitting devices, and a second reflective surface having a concave shape relative to the light emitting surface of the light emitting devices, the plurality of first reflective surfaces correspond to the plurality of light emitting devices respectively in an optical axis direction, the second reflective surface is disposed between the plurality of first reflective surfaces, and light emitted through the light emitting surface of the light emitting devices can be reflected from the first side surface and emitted through the second side surface.

Description

Technical Field

[0001] This embodiment relates to a lighting device and a lamp including the lighting device. Background Technology

[0002] Lighting equipment is a device that provides or controls the amount of light and is used in various fields. For example, lighting equipment can be applied to various fields, such as vehicles and buildings, to illuminate the interior or exterior. In particular, in recent years, light emitting devices have been used as light sources for lighting. Compared with conventional light sources, such as fluorescent lamps and incandescent lamps, such light emitting devices, such as light-emitting diodes (LEDs), have advantages such as low power consumption, semi-permanent lifespan, fast response speed, safety, and environmental friendliness. Such LEDs are being used in various optical components, such as various display devices, indoor or outdoor lights. Generally speaking, lights of various colors and shapes are used in vehicles, and recently, the use of LEDs as light sources for vehicles has been proposed. For example, LEDs are used in vehicle headlights, taillights, turn signals, etc. However, LEDs have the problem of a relatively small emission angle of the emitted light. For this reason, when using LEDs as vehicle lights, it is necessary to increase the light-emitting area of ​​the lamp. When a lamp includes an LED, there is a problem that the performance of the LED may be degraded or the uniformity of the emitted light may be reduced due to the heat generated when the LED emits light. When a lamp includes a light-emitting diode (LED), there is a problem of hot spots formed by the light emitted from the LED. In this case, when such a lamp is used to implement a linear light source or a surface light source, the uniformity characteristics of the light-emitting surface are degraded. Therefore, there is a need for new lighting devices and lamps that can solve the above problems. Summary of the Invention

[0003] Technical issues

[0004] Embodiments of the present invention provide lighting devices and lamps with improved brightness. Embodiments of the present invention also provide lighting devices and lamps capable of achieving uniform linear light sources or surface light sources.

[0005] Technical solution

[0006] The lighting device according to the embodiment includes: a substrate; a plurality of light emitting devices disposed on the substrate; a first reflective layer disposed on the substrate; a resin layer disposed on the first reflective layer; and a second reflective layer disposed on the resin layer, wherein the resin layer includes a first side surface facing the light emitting surfaces of the plurality of light emitting devices and a second side surface opposite to the first side surface, the first side surface including a plurality of first reflective surfaces having a convex shape relative to the light emitting surfaces of the light emitting devices and at least one second reflective surface having a concave shape relative to the light emitting surfaces of the light emitting devices, wherein the plurality of first reflective surfaces are disposed in a region corresponding to each of the plurality of light emitting devices in the optical axis direction, and the second reflective surface is disposed between the plurality of first reflective surfaces, and light emitted through the light emitting surfaces of the light emitting devices can be reflected from the first side surface and emitted through the second side surface.

[0007] According to an embodiment of the present invention, the second reflective surface may be disposed in a region corresponding to the region between a plurality of light emitting devices in the optical axis direction. The first and second reflective surfaces may include curved surfaces. The radius of curvature of the second reflective surface may be smaller than the radius of curvature of the first reflective surface. The first and second reflective surfaces may have a horizontal width, defined as the width in a direction perpendicular to the optical axis direction, and the horizontal width of the first reflective surface may be greater than the horizontal width of the second reflective surface. The horizontal width of the first reflective surface may be greater than the horizontal width of the light emitting device. The distance from the light emitting device to the first reflective surface in the optical axis direction may be longer than the distance from the light emitting device to the second reflective surface in the optical axis direction.

[0008] The lighting device according to the embodiment includes: a substrate; a plurality of light emitting devices disposed on the substrate; a first reflective layer disposed on the substrate; a resin layer disposed on the first reflective layer; and a second reflective layer disposed on the resin layer, wherein the resin layer includes a plurality of protruding portions protruding from a first side surface facing the emitting surface of the light emitting device, each of the plurality of protruding portions being disposed in a region corresponding to the plurality of light emitting devices in the optical axis direction, each of the protruding portions including a convex portion having a convex shape relative to the emitting surface of the light emitting device, and an extension portion disposed between the convex portion and the light emitting device, and light emitted through the emitting surface can be reflected by the protruding portions and emitted through a second side surface facing the first side surface.

[0009] According to embodiments of the present invention, the convex portion and the extended portion may have a horizontal width, defined as the width in a direction perpendicular to the optical axis. The horizontal width of the extended portion may be constant, and the horizontal width of the convex portion may decrease with increasing distance from the light emitting device. The length of the extended portion in the optical axis direction may be shorter than the length of the convex portion in the optical axis direction. The convex portion may include a first reflective surface disposed in a region corresponding to the light emitting surface of the light emitting device in the optical axis direction and having a convex shape, and the first reflective surface may include a curved surface. The resin layer may include at least one concave portion disposed between the plurality of protruding portions, and the concave portion may be disposed in a region corresponding to the region between the plurality of light emitting devices in the optical axis direction. The concave portion may include a second reflective surface having a concave shape relative to the light emitting surface of the light emitting device, and the second reflective surface may include a curved surface. The horizontal width of the concave portion may be smaller than the horizontal width of the convex portion. The radius of curvature of the first reflective surface may be larger than the radius of curvature of the second reflective surface.

[0010] The lamp according to the embodiment may include: a housing, one side of which is open and the housing has a receiving space located within the housing; and a lighting device disposed in the receiving space of the housing, the lighting device including the lighting device described above, and a second side surface that may be configured to face the open side of the housing.

[0011] According to an embodiment of the present invention, the distance of the receiving space in the optical axis direction can be 1 to 1.2 times the distance of the lighting device in the optical axis direction. The distance of the receiving space in the optical axis direction can be 4 mm or less shorter than the distance of the lighting device in the optical axis direction.

[0012] Beneficial effects

[0013] The lighting device and lamp according to the embodiment can have improved brightness characteristics. Specifically, the lighting device and lamp may include a protruding portion and a concave portion formed on a first side surface, and light emitted from the light emitting device can be reflected by the protruding portion and the concave portion and emitted towards the second side surface. In this case, the protruding portion and the concave portion may have a predetermined first direction length and second direction length, radius of curvature, etc. Therefore, the lighting device can minimize light loss within the equipment and can provide a line light source or planar light source with high brightness to the second side surface.

[0014] The lighting device and lamp according to the embodiment can have improved uniformity. Specifically, this embodiment can emit light in an indirect manner, wherein the light emission direction of the lighting device is opposite to the light emission direction of the light emitting device. Therefore, the light emitted from the light emitting device can ensure sufficient light guiding distance within the lighting device. Thus, the light emitted to the second side surface can have uniform brightness according to the area of ​​the second side surface, thereby preventing the formation of hot spots or dark areas of concentrated light on the second side surface. In other words, the lighting device and lamp according to the embodiment can provide a linear light source or a surface light source with uniform brightness.

[0015] The lighting device according to the embodiment can be provided in a rigid or flexible form. Therefore, the lighting device and lamp can be provided in various designs and can simultaneously provide uniform and high-brightness light. Attached Figure Description

[0016] Figure 1 This is a top view of a lighting device according to an embodiment.

[0017] Figure 2 For along according to Figure 1 A cross-sectional view of the lighting equipment taken along line A-A'.

[0018] Figure 3 For along according to Figure 1 A cross-sectional view of the lighting equipment taken from line B-B'.

[0019] Figure 4 For illustration Figure 1 A magnified view of the magnified area A1.

[0020] Figure 5 and Figure 6 This is a view showing a lighting device according to an embodiment having a shape that is curved in multiple directions.

[0021] Figure 7 and Figure 8 This is a view illustrating the lamp used in the lighting device according to an embodiment.

[0022] Figure 9 This diagram illustrates the shape of light emitted from a lamp according to an embodiment.

[0023] Figure 10 This is a front view of a light emitting device applied to a lighting apparatus according to an embodiment.

[0024] Figure 11 This is a side view of a light emitting device applied to a lighting device according to an embodiment.

[0025] Figures 12 to 14This is a view illustrating an example of a lamp, including a lighting device according to an embodiment, applied to a vehicle. Detailed Implementation

[0026] Preferred embodiments of the invention will be described in detail below with reference to the accompanying drawings. The inventive concept is not limited to some of the embodiments described, but can be implemented in various different forms, and one or more components may be selectively combined and substituted between embodiments when within the scope of the inventive concept. Furthermore, unless explicitly and specifically defined and described, the terminology (including technical and scientific terms) used in the embodiments of the invention is to be interpreted as having a meaning generally understood by one of ordinary skill in the art to which this invention pertains, and general terms, such as those defined in dictionaries, may be interpreted in light of the context of the relevant art. Additionally, the terminology used in the embodiments of the invention is for describing embodiments and is not intended to limit the invention. In this specification, the singular form may include the plural form unless specifically described in a phrase, and when described as “at least one (or more than one) of A and / or B and C,” it may include at least one combination of all combinations that can be formed from A, B, and C. Furthermore, terms such as first, second, A, B, (a), (b) may be used to describe components of embodiments of the invention. These terms are intended only to distinguish said component from other components and are not determined by the nature, order, or sequence of these components. Furthermore, when a component is described as "connected," "linked," or "connected" to another component, this refers not only to the direct connection, linking, or being connected to another component, but also to the presence of another component between that component and the other component. Additionally, when each component is described as being formed or positioned "upwards" or "downwards," "upwards" or "downwards" includes not only the case where two components are in direct contact with each other, but also the case where one or more components are formed or positioned between the two components. Furthermore, when expressed as "upwards" or "downwards," this can include not only the upward direction relative to a component, but also the downward direction.

[0027] The lighting device according to the embodiments can be applied to various lighting devices requiring illumination, such as automotive lights, household optical components, and industrial optical components. For example, when applied to automotive lights, the lighting device according to the embodiments can be applied to headlights, side mirror lights, side marker lights, fog lights, taillights, brake lights, daytime running lights, vehicle interior lighting, door scarf, rear combination lights, backup lights, etc. Additionally, when applied to automotive lights, the lighting device according to the embodiments can be applied to rear side assist systems (BSD) installed in side mirrors or A-pillars. Furthermore, the optical components of the present invention can be applied to indoor and outdoor advertising devices, display devices, and various electric vehicles, as well as all lighting and advertising fields currently developed and commercialized, or all lighting and advertising fields that may be realized due to future technological advancements.

[0028] Furthermore, before describing the embodiments, the first direction may refer to the x-axis direction shown in the figures, and the second direction may be a direction different from the first direction. For example, the second direction may refer to the y-axis direction shown in the figures as perpendicular to the first direction, and may refer to the optical axis direction of the light emitting device. Additionally, the horizontal direction may refer to both the first and second directions, and the vertical direction may refer to a direction perpendicular to at least one of the first and second directions. For example, the horizontal direction may refer to both the x-axis and y-axis directions in the figures, and the vertical direction may refer to the z-axis direction in the figures as perpendicular to both the x-axis and y-axis directions.

[0029] Figure 1 This is a top view of the lighting device according to the embodiment, and Figure 2 For along according to Figure 1 A cross-sectional view of the lighting equipment taken along line A-A'. Additionally, Figure 3 For along according to Figure 1 A cross-sectional view of the lighting equipment taken along line B-B', and Figure 4 For illustration Figure 1 A magnified view of the magnified area A1.

[0030] Reference Figures 1 to 4 The lighting device 1000 according to the embodiment can emit light emitted from a plurality of light emitting devices 200 as a linear light source or a surface light source. For example, the lighting device 1000 may include an area in which light emitted from the light emitting devices 200 is reflected, a diffused area, and an area in which light emitted from the light emitting devices 200 can be emitted as a linear light source or a surface light source.

[0031] The lighting device 1000 can be provided as a rigid or flexible module. For example, the lighting device can be flat or flexible in at least one of a first direction (x-axis direction) and a second direction (y-axis direction). The lighting device 1000 emits light to one side of the device and can have a length X1 in the first direction (x-axis direction) and a length Y1 in the second direction (y-axis direction). The length X1 of the lighting device 1000 in the first direction can vary depending on the number of light emitting devices 200 arranged within the lighting device 1000 along the first direction. For example, the lighting device 1000 can include multiple light emitting devices 200, and the length X1 of the lighting device 1000 in the first direction can be about 30 mm or more. Furthermore, the length Y1 of the lighting device 1000 in the second direction can vary depending on the number of rows of light emitting devices 200 arranged in the lighting device 1000. For example, multiple light emitting devices 200 arranged in the lighting device 1000 can be arranged in one or more rows, and the length Y1 of the lighting device 1000 in the second direction can be about 16 mm or more. Specifically, the length Y1 in the second direction can be approximately 20 mm or greater. The length Y1 of the lighting device 1000 in the second direction can be shorter than the length X1 in the first direction. The lighting device 1000 can be defined as a light emitting unit, a lighting module, or a light source module. The lighting device 1000 may include one or more light emitting units disposed on a main substrate (not shown) or a substrate 100 described later. Here, when multiple light emitting units are disposed on a single substrate 100, the main substrate can be omitted.

[0032] The lighting device 1000 may include a substrate 100, a light emitting device 200, a first reflective layer 300, and a resin layer 400. The substrate 100 may include a printed circuit board (PCB). The substrate 100 may include at least one of, for example, a resin-based PCB, a metal-core PCB, a flexible PCB, a ceramic PCB, or an FR-4 substrate. When the substrate 100 is configured as a metal-core PCB with a metal layer disposed on its bottom, the heat dissipation efficiency of the light emitting device 200 can be improved. Additionally, the substrate 100 may include a light-transmitting material. Specifically, the substrate 100 may include a material that allows light to be transmitted through its upper and lower surfaces. The substrate 100 may include at least one of PET (polyethylene terephthalate), PS (polystyrene), PI (polyimide), PEN (polyethylene naphthalate), and PC (polycarbonate). The substrate 100 may be electrically connected to the light emitting device 200. The substrate 100 includes a wiring layer (not shown) on the substrate 100, and the wiring layer may be electrically connected to the light emitting device 200. When multiple light emitting devices 200 are arranged on the substrate 100, the multiple light emitting devices 200 can be connected in series, parallel, or series-parallel through wiring layers. The substrate 100 can be used as a base member or support member disposed below the light emitting devices 200 and the resin layer 400.

[0033] A light emitting device 200 may be disposed on a substrate 100. The light emitting device 200 is a device having a light-emitting diode (LED) and may include a package encapsulating a light-emitting chip. The light-emitting chip 271 may emit at least one of visible light, such as blue, red, green, and yellow, ultraviolet (UV), and infrared light, and the light emitting device 200 may emit at least one of visible light, such as white, blue, red, yellow, and green. It may emit at least one of visible light, ultraviolet light, and infrared light. The light emitting device 200 may be a side-view type having a light-emitting surface 201 facing one side of the lighting device 1000. For example, the light-emitting surface 201 of the light emitting device 200 may face the side surface of the resin layer 400. The optical axis of the light emitting device 200 may be parallel to the upper surface of the substrate 100.

[0034] The plurality of light emitting devices 200 can be disposed on the substrate 100. For example, a plurality of light emitting devices 200 spaced apart in a first direction (x-axis direction) and extending along the first direction can be disposed on the substrate 100. The plurality of light emitting devices 200 can emit linear light. The plurality of light emitting devices 200 can be arranged in at least one row. For example, the plurality of light emitting devices 200 can be arranged as follows: Figure 1The light emitters are arranged in a row as shown. In this case, the plurality of light emitting devices 200 may include a first light emitting device 200a and a second light emitting device 200b spaced apart in a first direction. The first light emitting device 200a and the second light emitting device 200b may be spaced apart by a first spacing P1 defined as the spacing in the first direction. Here, the first spacing P1 may refer to the distance between the center of the first light emitting device 200a and the center of the second light emitting device 200b in the first direction. The first spacing P1 may be about 10 mm or greater. Specifically, the first spacing P1 may be about 10 mm to about 20 mm. When the first spacing P1 is less than about 10 mm, the number of light emitting devices 200 required may increase, and the uniformity of the emitted light may deteriorate. In addition, when the first spacing P1 exceeds about 20 mm, the brightness of the emitted light may decrease. Therefore, it is preferable that the first spacing P1 meets the above-described range.

[0035] Additionally, although not shown in the figures, the plurality of light emitting devices 200 can be arranged in multiple rows, such as two rows, spaced apart in the second direction (y-axis direction). In this case, the plurality of light emitting devices arranged in the second row can be positioned at locations corresponding to the regions between the plurality of light emitting devices 200 arranged in the first row. For example, the plurality of light emitting devices in the second row can be positioned in the region in the second direction corresponding to the concave portion 430, which will be described later. Specifically, the optical axes of the plurality of light emitting devices in the second row can overlap with the apex of the concave portion 430 in the optical axis direction. The plurality of light emitting devices arranged in the second row can be spaced apart by a second spacing (not shown), defined as a spacing in the first direction. Here, the second spacing can refer to the spacing between the centers of the plurality of light emitting devices arranged in the second row in the first direction. The second spacing can be the same as the first spacing P1. Furthermore, the plurality of light emitting devices 200 spaced apart in the first direction (x-axis direction) in the first row can be arranged so that they do not overlap (in the y-axis direction) with the plurality of light emitting devices 200 spaced apart in the first direction in the second row. In other words, the multiple light emitting devices 200 arranged in the first row and the multiple light emitting devices 200 arranged in the second row can be arranged in a zigzag pattern.

[0036] The plurality of light emitting devices 200 can emit light of the same color as each other. For example, the plurality of light emitting devices 200 can emit light of the same wavelength toward the side surface of the resin layer 400. Alternatively, the plurality of light emitting devices 200 can emit light of different wavelengths. For example, some of the plurality of light emitting devices 200 can emit light of a first wavelength, and the remainder or other parts can emit light of a second wavelength different from the first wavelength. Therefore, the lighting device 1000 can use a single device to selectively provide one wavelength of light or multiple wavelengths of light.

[0037] The light emitting device 200 may include a light emitting surface 201 from which light is emitted. For example, when the light emitting device 200 is a side-light type, the light emitting surface 201 of the light emitting device 200 may face a side of the lighting device 1000. Specifically, the light emitting surface 201 may face a side surface (first side surface S1) of the resin layer 400, which will be described later. The light emitting surface 201 may refer to the surface that emits the highest intensity of light toward a side of the lighting device 1000. The light emitting surface 201 may be formed as a plane and may include a concave or convex surface. The light L emitted from the light emitting device 200 may be emitted in a direction toward a side of the lighting device 1000, specifically toward a side of the resin layer 400 (first side surface S1). In addition, the emitted light L can be reflected on one side surface of the resin layer 400 to travel toward the other side surface (the second side surface (S2) of the resin layer 400), and can be emitted through the other side surface (the second side surface (S2) of the resin layer 400) to the outside of the resin layer 400.

[0038] A first reflective layer 300 may be disposed on the substrate 100. The first reflective layer 300 may be disposed between the substrate 100 and the resin layer 400. The first reflective layer 300 may be provided in the form of a film having a metallic or non-metallic material. The first reflective layer 300 may be adhered to the upper surface of the substrate 100. Alternatively, the first reflective layer 300 may be bonded between the resin layer 400 and the substrate 100, but is not limited thereto. The area of ​​the first reflective layer 300 may be smaller than the area of ​​the upper surface of the substrate 100. The first reflective layer 300 may be spaced apart from the edge of the substrate 100, and the resin layer 400 may be attached to the substrate 100 in the spaced areas of the first reflective layer 300. Therefore, peeling of the edge portion of the first reflective layer 300 can be prevented. The first reflective layer 300 may include an opening 301 in which the lower portion of the light emitting device 200 is disposed. A portion that exposes the upper surface of the substrate 100 and allows the lower portion of the light emitting device 200 to be bonded may be disposed in the opening 301 of the first reflective layer 300. The size of the opening 301 can be the same as or larger than the size of the light emitting device 200, but is not limited thereto. The thickness of the first reflective layer 300 can be less than the thickness of the substrate 100. For example, the first reflective layer 300 can be configured to have a thickness of about 0.5 to about 1 times the thickness of the first substrate 100 to reduce transmission loss of incident light. Alternatively, the first reflective layer 300 can be formed to have a thickness less than that of the light emitting device 200. The thickness of the first reflective layer 300 can be about 0.2 mm to about 0.4 mm. Through the opening 301 of the first reflective layer 300, the lower portion of the light emitting device 200 can be inserted into the first reflective layer 300, and the upper portion of the light emitting device 200 can protrude through the opening 301. The light emitting surface 201 of the light emitting device 200 can be disposed in a direction perpendicular to the upper surface of the first reflective layer 300.

[0039] The first reflective layer 300 may include a metallic or non-metallic material. The metallic material may include metals such as aluminum, silver, or gold. The non-metallic material may include a plastic or resin material. The plastic material may be selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, biphenyl chloride, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polybutylene terephthalate, polyethylene naphthalate, polyamide, polyacetal, polyphenylene ether, polyamide-imide, polyether-imide, polycarbonate, polyetheretherketone, polyimide, polytetrafluoroethylene, liquid crystal polymers, fluorinated resins, copolymers thereof, and mixtures thereof. As a resin material, reflective materials such as TiO2, Al2O3, or SiO2 may be added to silicone resin or epoxy resin. The first reflective layer 300 may be implemented as a single layer or multiple layers, and such a layered structure can improve light reflection efficiency. The first reflective layer 300 according to the embodiment can increase the amount of light, such that light is emitted in a uniformly distributed manner by reflecting incident light. Here, when a highly reflective material is coated on the upper surface of the substrate 100, the first reflective layer 300 can be omitted.

[0040] The first reflective layer 300 may include a plurality of reflective portions (not shown). The reflective portions may be bubbles, such as air or a medium having the same refractive index as air. The first reflective layer 300 may reflect light incident from the plurality of reflective portions or refract light incident from the plurality of reflective portions in different directions. The first reflective layer 300 may include reflective patterns (not shown). The reflective patterns may have a plurality of dot-like shapes. The plurality of reflective patterns may be disposed on the upper surface of the first reflective layer 300. For example, the plurality of reflective patterns may be disposed in a manner protruding from the upper surface of the first reflective layer 300. The plurality of reflective patterns may be spaced apart from the light emitting device 200 and disposed along the emission direction of light emitted from the light emitting device 200. The plurality of reflective patterns may be formed on the first reflective layer 300 by printing. The plurality of reflective patterns may contain reflective ink. The plurality of reflective patterns may be printed using a material containing any one of TiO2, CaCO3, BaSO4, Al2O3, silicon, and PS. The planar shape of each of the plurality of reflective patterns may be selected from a circular shape, an elliptical shape, or a polygonal shape. Furthermore, each of the plurality of reflective patterns may have a hemispherical cross-section or a polygonal shape. The material of the plurality of reflective patterns may be white. The density of the dot pattern of the plurality of reflective patterns may increase with increasing distance from the light emitting device 200. Specifically, the reflective pattern density per unit area may increase with increasing distance from the light emitting surface 201 of the light emitting device 200. For example, the reflective pattern density per unit area may increase from the light emitting surface 201 toward the protrusion 410, which will be described later. Additionally, the size of the plurality of reflective patterns may vary with increasing distance from the light emitting surface 201 of the light emitting device 200. Specifically, the width of the plurality of reflective patterns in the horizontal direction may increase with increasing distance from the light emitting surface 201 of the light emitting device 200. For example, the size of the reflective patterns may increase from the light emitting surface 201 toward the protrusion 410.

[0041] The plurality of reflective patterns can also be disposed on the rear surface of the light emitting device 200 opposite to the front surface and on the front surface of the light emitting device 200 facing the protruding portion 410. Specifically, the reflective patterns can also be disposed between the light emitting device 200 and the second side surface S2 of the resin layer 400. Therefore, light can be reflected on the first side surface S1 and delivered more effectively towards the second side surface S2. The plurality of reflective patterns can be disposed on the path of light emitted from the light emitting device 200 and / or on the path of light emitted from the light emitting device 200 and reflected by other components, thereby improving light reflectivity and reducing light loss.

[0042] Resin layer 400 can be disposed on substrate 100. Resin layer 400 can face substrate 100. Resin layer 400 can be disposed on the entire upper surface or a portion thereof of substrate 100. The area of ​​the lower surface S5 of resin layer 400 can be equal to or greater than the area of ​​the upper surface of substrate 100. Resin layer 400 can be formed of a transparent material. Resin layer 400 can contain resin materials, such as silicone resin or epoxy resin. Resin layer 400 can contain thermosetting resin materials, such as, optionally, PC, OPS, PMMA, PVC, etc. Resin layer 400 can be formed of glass, but is not limited thereto. For example, a resin material containing polyurethane acrylate oligomers as the main material can be used as the main material of resin layer 400. For example, a mixture of synthetic oligomers, polyurethane acrylate oligomers, and polyacrylate polymers can be used. Of course, it may also contain monomers such as IBOA (isoborneol acrylate), HPA (hydroxypropyl acrylate), 2-HEA (hydroxyethyl acrylate), etc., which are low-boiling-point dilution reactive monomers, and may be mixed with photoinitiators (e.g., 1-hydroxycyclohexylphenyl ketone) or antioxidants as additives.

[0043] Since the resin layer 400 is configured as a layer that guides light using resin, it can be configured to have a thinner thickness than in the case of glass, and can be configured as a flexible sheet. The resin layer 400 can emit point light sources emitted from the light emitting device 200 in the form of line light sources or surface light sources. The resin layer 400 can emit light by diffusing the light emitted from the light emitting device 200. For example, the resin layer 400 may include protrusions (not shown) that diffuse and reflect incident light to increase the light intensity. The protrusions may be provided in the range of 0.01% to 0.3% based on the weight of the resin layer 400. The protrusions may be formed from any of silicon, silica, glass bulbs, PMMA (polymethyl methacrylate), polyurethane, Zn, Zr, Al2O3, and acrylates, and the particle diameter of the protrusions may be in the range of about 1 μm to about 20 μm, but is not limited thereto.

[0044] Since the resin layer 400 is disposed on the light emitting device 200, the light emitting device 200 can be protected and the loss of light emitted from the light emitting device 200 can be reduced. The light emitting device 200 can be concealed beneath the resin layer 400.

[0045] The resin layer 400 can contact the surface of the light emitting device 200 and the emitting surface of the light emitting device 200. A portion of the resin layer 400 can be disposed in the opening 301 of the first reflective layer 300. A portion of the resin layer 400 can contact the upper surface of the substrate 100 through the opening 301 of the first reflective layer 300. Therefore, since a portion of the resin layer 400 is in contact with the substrate 100, the first reflective layer 300 can be fixed between the resin layer 400 and the substrate 100.

[0046] The thickness h1 of the resin layer 400 can be the distance from the upper surface of the substrate 100 to the lower surface of the second reflective layer 500. The thickness h1 of the resin layer 400 can also be the distance from the upper surface of the first reflective layer 300 to the lower surface of the second reflective layer 500. A portion of the resin layer 400 can extend through the opening 301 of the first reflective layer 300. The thickness h1 of the resin layer 400 can be less than twice the thickness of the light emitting device 200. The resin layer 400 can be formed with a thickness greater than the thickness of the light emitting device 200. The thickness h1 of the resin layer 400 can be less than twice the thickness of the light emitting device 200. Furthermore, the thickness h1 of the resin layer 400 can be approximately 0.8 times or less than the total thickness of the lighting device 1000. Specifically, the thickness of the resin layer 400 can be approximately 0.4 to 0.8 times the total thickness of the lighting device 1000. For example, the thickness h1 of the resin layer 400 can be approximately 1 mm or greater. Specifically, the thickness h1 of the resin layer 400 can be from about 1 mm to about 10 mm. More specifically, the thickness h1 of the resin layer 400 can be from about 1 mm to about 2 mm. When the thickness h1 of the resin layer 400 is less than about 1 mm, the light emitted from the light emitting device 200 may not be effectively guided. Therefore, the light source module 1000 may find it difficult to achieve a uniform surface light source. In addition, when the thickness h1 of the resin layer 400 is less than about 1 mm, it may be difficult to effectively protect the light emitting device 200, and the adhesion between the substrate 100 and the first reflective layer 300 may decrease. Furthermore, when the thickness h1 of the resin layer 400 exceeds about 10 mm, light loss may occur due to the increased travel path of the light emitted from the light emitting device 200, and the brightness of the surface light source may decrease. Therefore, the thickness h1 of the resin layer 400 preferably meets the above-mentioned range, and considering the luminous efficiency and ductility characteristics of the lighting device 1000, it can be from about 1.5 mm to about 3 mm. The height h2 from the lower surface of the substrate 100 to the upper surface of the light emitting device 200 can be about 2.5 mm or less. More specifically, the height h2 from the lower surface of the substrate 100 to the upper surface of the light emitting device 200 can be about 2 mm or less. More specifically, the height h2 can be from about 1.5 mm to about 2 mm. Preferably, when providing a line light source or a surface light source, the height h2 from the lower surface of the substrate 100 to the upper surface of the light emitting device 200 satisfies the above range to reduce the overall height of the lighting device 1000. The resin layer 400 may include a plurality of side surfaces S1, S2, S3 and S4, a protruding portion 410, and a concave portion 430, which will be described in more detail in the paragraphs described later.

[0047] The lighting device 1000 may further include a second reflective layer 500. The second reflective layer 500 may be disposed on the resin layer 400. The second reflective layer 500 may be disposed in the form of a film having a metallic or non-metallic material. The second reflective layer 500 may be adhered to the upper surface of the resin layer 400. The second reflective layer 500 may have a shape corresponding to the upper surface S6 of the resin layer 400. Furthermore, the second reflective layer 500 may have an area corresponding to the upper surface S6 of the resin layer 400. For example, the length of the second reflective layer 500 in the first and second directions may be the same as the length of the upper surface S6 of the resin layer 400 in the first and second directions.

[0048] The thickness of the second reflective layer 500 can be less than the thickness of the substrate 100. For example, the second reflective layer 500 can be configured to have a thickness of about 0.5 to about 1 times the thickness of the substrate 100 to reduce transmission loss of incident light. Alternatively, the second reflective layer 500 can be formed to have a thickness less than that of the light emitting device 200. The second reflective layer 500 can have a thickness of about 0.2 mm to about 0.4 mm. The second reflective layer 500 can also have the same thickness as the first reflective layer 300.

[0049] The second reflective layer 500 may comprise a metallic or non-metallic material. The metallic material may comprise metals, such as aluminum, silver, or gold. The non-metallic material may comprise a plastic or resin material. The plastic material may be selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, biphenyl chloride, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polybutylene terephthalate, polyethylene naphthalate, polyamide, polyacetal, polyphenylene ether, polyamide-imide, polyether-imide, polycarbonate, polyetheretherketone, polyimide, polytetrafluoroethylene, liquid crystal polymers, fluorinated resins, copolymers thereof, and mixtures thereof. As a resin material, reflective materials such as TiO2, Al2O3, or SiO2 may be added to silicone resin or epoxy resin. The first reflective layer 300 may be implemented as a single layer or multiple layers, and such a layer structure can improve light reflection efficiency. The second reflective layer 500 according to the embodiment can increase the amount of light, thereby making the light uniformly distributed by reflecting the incident light. Here, when the housing 600, which will be described later, contains a light-reflective material, the second reflective layer 500 may be omitted.

[0050] The second reflective layer 500 may include a plurality of reflective elements (not shown). The reflective elements may be bubbles, such as air or a medium having the same refractive index as air. The second reflective layer 500 may reflect light incident from the plurality of reflective elements or refract light incident from the plurality of reflective elements in different directions.

[0051] The light emitting device 200 can be disposed between vertically facing reflective layers, such as between the first reflective layer 300 and the second reflective layer 500, and can be sealed by the resin layer 400. Therefore, the light L emitted from the light emitting device 200 toward one side surface (first side surface S1) of the lighting device 1000 will not be emitted to the lower surface S5 and upper surface S6 of the resin layer 400, and can be reflected and / or guided to the resin layer 400, the first reflective layer 300, the second reflective layer 500, etc., to be emitted toward the other side surface S2 of the lighting device 1000.

[0052] The resin layer 400 may include multiple outer surfaces. For example, the resin layer 400 may include a first side surface S1, a second side surface S2, a third side surface S3, and a fourth side surface S4 disposed between the lower surface S5 and the upper surface S6. The first side surface S1 may be a surface facing the light emitting device 200. Specifically, the first side surface S1 may be a surface facing the light emitting surface 201 of the light emitting device 200 in the optical axis direction (second direction (y-axis direction)). That is, light L emitted through the light emitting surface 201 of the light emitting device 200 can be provided to the first side surface S1. The second side surface S2 may be a surface of the resin layer 400 opposite to the first side surface S1, based on the lower surface S5 and the upper surface S6. The second side surface S2 is a surface facing the first side surface S1 in the second direction, and may be a surface facing the rear surface of the light emitting device 200. The second side surface S2 is the light emitting surface of the lighting device 1000 and may extend along the first direction (x-axis direction). The second side surface S2 can be flat in the vertical direction (Z-axis direction). Alternatively, the second side surface S2 can include a curved surface that protrudes or recedes relative to the vertical direction, and can have a shape inclined at a predetermined angle relative to the lower surface S5 and upper surface S6 of the resin layer 400. A third side surface S3 can be disposed between the first side surface S1 and the second side surface S2. Specifically, the third side surface S3 can be a side surface connecting one end of the first side surface S1 and one end of the second side surface S2. A fourth side surface S4 can be disposed between the first side surface S1 and the second side surface S2. Specifically, the fourth side surface S4 can be a side surface connecting the other end of the first side surface S1 opposite to the first end and the other end of the second side surface S2 opposite to the first end. The fourth side surface S4 can be a surface opposite to the third side surface S3 relative to the lower surface S5 and upper surface S6 of the resin layer 400, and can face the third side surface S3 in a first direction.

[0053] The first side surface S1 may have a length in the first direction (x-axis direction) corresponding to the length of the second side surface S2. For example, the length of the first side surface S1 in the first direction may be the same as the length of the second side surface S2 in the first direction. The lengths of the first side surface S1 and the second side surface S2 in the first direction may correspond to the length X1 of the lighting device 1000 in the first direction. Furthermore, the length of the first side surface S1 in the vertical direction (z-axis direction) may be the same as the length of the second side surface S2 in the vertical direction. Additionally, the planar region of the first side surface S1 may be different from the planar region of the second side surface S2. For example, the planar region of the first side surface S1 may be larger than the planar region of the second side surface S2. The third side surface S3 may correspond to the fourth side surface S4. For example, the third side surface S3 and the fourth side surface S4 may have the same length in the second direction (y-axis direction) and the same length in the vertical direction. The lengths of the third side surface S3 and the fourth side surface S4 in the second direction may correspond to the length Y1 of the lighting device 1000 in the second direction. Furthermore, the lengths of the third side surface S3 and the fourth side surface S4 in the second direction can be longer than their lengths in the vertical direction. Additionally, the third side surface S3 and the fourth side surface S4 can have corresponding planar shapes and can be disposed on the same plane. The lengths of the first side surface S1 and the second side surface S2 in the first direction can differ from the lengths of the third side surface S3 and the fourth side surface S4 in the second direction. For example, the lengths of the first side surface S1 and the second side surface S2 in the first direction can be longer than their lengths in the second direction. Furthermore, the lengths of the first to fourth side surfaces S1, S2, S3, and S4 in the vertical direction can be equal. Here, the lengths of the first side surface S1 and the second side surface S2 in the first direction can correspond to the length X1 of the lighting device 1000 in the first direction, and the lengths of the third side surface S3 and the fourth side surface S4 in the second direction can correspond to the length Y1 of the lighting device 1000 in the second direction.

[0054] The first side surface S1 is a surface facing the light-emitting surface 201 of the light-emitting device 200 and can reflect light emitted through the light-emitting surface 201. That is, the first side surface S1 can be a side surface with a shape or uneven structure for reflecting light emitted from the light-emitting device 200 along a predetermined direction. Specifically, the resin layer 400 may include a plurality of protruding portions 410 protruding from the first side surface S1. The protruding portions 410 may have a shape extending along the optical axis direction of the light-emitting device 200. The plurality of protruding portions 410 can reflect light emitted from the light-emitting surface 201 and, compared to an imaginary first straight line (not shown) connecting the ends of the third side surface S3 and the fourth side surface S4, may have a shape protruding along a second direction.

[0055] The plurality of protrusions 410 can be disposed in regions corresponding to the plurality of light emitting devices 200. Specifically, the protrusions 410 can be disposed in regions corresponding to the light emitting devices 200 in the direction of the optical axis (second direction (y-axis direction)). More specifically, the vertices of the protrusions 410 can overlap with the optical axis of each light emitting device 200 in the second direction. The plurality of protrusions 410 can be provided in a number corresponding to the number of light emitting devices 200. Specifically, the protrusions 410 can be provided in the same number as the light emitting devices 200. That is, the protrusions 410 can be matched and arranged one-to-one in the regions corresponding to the light emitting devices 200. The plurality of protrusions 410 can be spaced apart in a first direction and can have corresponding shapes. For example, the spacing between adjacent protrusions 410 can correspond to the spacing of the light emitting devices 200. Specifically, the spacing between the vertices of the plurality of adjacent protrusions 410 in the first direction can correspond to a first spacing P1. The plurality of protruding portions 410 may have the same length X2 in a first direction and the same length Y2 in a second direction. Here, the length X2 of the protruding portion 410 in the first direction may refer to the maximum length of the protruding portion 410 in the first direction. The length X2 of the protruding portion 410 in the first direction may be longer than the length of the light emitting device 200 in the first direction. In addition, the length X2 of the protruding portion 410 in the first direction may be greater than the thickness h1 of the resin layer 400.

[0056] For example, the length X2 of the protruding portion 410 in the first direction can be from about 7 mm to about 20 mm. More specifically, the length X2 of the protruding portion 410 in the first direction can be from about 10 mm to about 18 mm. When the length X2 of the protruding portion 410 in the first direction is less than about 7 mm, light emitted from one light emitting device 200 may not be effectively provided to the protruding portion 410 disposed in the corresponding area. Therefore, the overall brightness of the lighting device 1000 may decrease, and the brightness of the light L emitted to the second side surface S2 may be uneven depending on the area. Conversely, when the length X2 of the protruding portion 410 in the first direction exceeds about 20 mm, the light L emitted from the light emitting device 200 can be effectively provided to the protruding portion 410, but the first spacing P1 between the multiple light emitting devices 200 may increase, and thus the overall brightness of the lighting device 1000 may decrease. Therefore, considering the beam angle, brightness characteristics, and reflection characteristics of the light emitting device 200, it is preferable that the length X2 of the protruding portion 410 in the first direction meets the above-mentioned range. The length Y2 of the protruding portion 410 in the second direction can be shorter than the length X2 of the protruding portion 410 in the first direction. For example, the length Y2 of the protruding portion 410 in the second direction can be from about 3 mm to about 12 mm. More specifically, the length Y2 of the protruding portion 410 in the second direction can be from about 5 mm to about 10 mm. Here, the length Y2 of the protruding portion 410 in the second direction can refer to the distance from the imaginary first straight line to the vertex of the protruding portion 410 in the second direction. When the length Y2 of the protruding portion 410 in the second direction is less than about 3 mm, the overall brightness of the lighting device 1000 may increase, but the brightness of the light L emitted to the second side surface S2 may be uneven depending on the region. Conversely, when the length Y2 of the protruding portion 410 in the second direction exceeds about 12 mm, the light L emitted by the lighting device 1000 can have uniform brightness regardless of the region, but the overall brightness may decrease due to the increased light travel path. Therefore, considering the brightness characteristics and preventing the formation of dark areas on the second side surface S2 due to uneven light, it is preferable that the length Y2 of the protruding portion 410 in the second direction meets the above-described range.

[0057] Each of the plurality of protrusions 410 may include a convex portion 411 and an extension portion 413. The convex portion 411 may be a region in the protrusion 410 that has a convex shape relative to the light emitting surface 201 of the light emitting device 200. Specifically, the convex portion 411 may have a downward convex shape relative to an imaginary first straight line (see reference). Figure 4For example, when viewed from above, the convex portion 411 may have at least one of the following shapes relative to the light-emitting surface 201: a convex semi-circular shape, a semi-elliptical shape, and an aspherical shape. The convex portion 411 may have a length Y3 in a first direction and a length Y3 in a second direction. Specifically, the maximum length of the convex portion 411 in the first direction may correspond to the length X2 of the protrusion 410 in the first direction. In addition, the length Y3 of the convex portion 411 in the second direction may be shorter than the maximum length of the convex portion 411 in the first direction. For example, the length Y3 of the convex portion 411 in the second direction may be about 2 mm to about 8 mm. Specifically, the length Y3 of the convex portion 411 in the second direction may be about 3 mm to about 6 mm. The convex portion 411 may include a first reflective surface S11 defined as an outer surface. The first reflective surface S11 is the outer surface of the protrusion 410 and may be the surface constituting the first side surface S1. The first reflective surface S11 may be disposed in a region corresponding to the light-emitting device 200 in the second direction, which is the direction of the optical axis. For example, the vertex of the first reflective surface S11 may overlap with the optical axis of the light emitting device 200 in the second direction.

[0058] Because the convex portion 411 has the aforementioned shape, the first reflective surface S11 can include a curved surface. The first reflective surface S11 can be configured as a curved surface having a predetermined radius of curvature over the entire area. For example, the radius of curvature of the first reflective surface S11 can be from approximately 4 mm to approximately 15 mm. Specifically, the radius of curvature of the first reflective surface S11 can be from approximately 5 mm to approximately 10 mm. When the radius of curvature of the first reflective surface S11 is less than approximately 4 mm, it may be difficult to effectively reflect light incident on the protrusion 410 toward the second side surface S2. Furthermore, when the radius of curvature of the first reflective surface S11 exceeds approximately 15 mm, the angle of light reflected by the first reflective surface S11 is relatively small, and therefore the brightness of the light emitted to the second side surface S2 may be uneven depending on the area. Therefore, it is preferable that the radius of curvature of the first reflective surface S11 satisfies the aforementioned range. In other words, the convex portion 411 includes a first reflective surface S11 with a curved surface, and the horizontal width, defined as the length of the convex portion 411 in the first direction (x-axis direction), can vary depending on the distance from the light emitting device 200 in the optical axis direction. For example, the horizontal width of the convex portion 411 can decrease as the distance from the light emitting device 200 increases. Specifically, the horizontal width of the convex portion 411 can decrease as the distance from the light emitting device 200 in the optical axis direction (second direction (y-axis direction)) increases. That is, the horizontal width, defined as the length of the first reflective surface S11 in the first direction, can decrease as the distance from the light emitting device 200 in the optical axis direction increases.

[0059] An extension portion 413 may be disposed between the light emitting device 200 and the convex portion 411. When viewed from above, the extension portion 413 may have a polygonal shape, such as a quadrilateral shape. The extension portion 413 may have a length in a first direction and a length Y4 in a second direction. The length of the extension portion 413 in the first direction may correspond to the length of the convex portion 411 in the first direction. That is, the length of the extension portion 413 in the first direction may correspond to the length X2 of the protrusion 410 in the first direction. The length of the extension portion 413 in the first direction may be constant. Specifically, regardless of the distance between the optical axis directions (second direction) of the light emitting device 200, the horizontal width defined as the length of the extension portion 413 in the first direction may be constant. The length Y4 of the extension portion 413 in the second direction may be shorter than the length Y3 of the convex portion 411 in the second direction. The length Y4 of the extension portion 413 in the second direction may be shorter than the length of the extension portion 413 in the first direction. For example, the length Y4 of the extension portion 413 in the second direction may be from about 1 mm to about 4 mm. Specifically, the length Y4 of the extension portion 413 in the second direction can be approximately 2 mm to approximately 4 mm. Here, the length Y4 of the extension portion 413 in the second direction can refer to the distance in the second direction from the imaginary first straight line to the boundary between the convex portion 411 and the extension portion 413. In addition, the sum of the second direction length Y4 of the extension portion 413 and the second direction length Y3 of the convex portion 411 can satisfy the second direction length Y2 of the convex portion 410.

[0060] The light emitting device 200 may be spaced apart from the protrusion 410, such as the extension 413, in the second direction. In this case, the length Y5 from the light emitting device 200 to the extension 413 in the second direction may be longer than the length Y2 of the protrusion 410 in the second direction. Specifically, the length Y5 from the light emitting device 200 to the extension 413 in the second direction may be about 1.05 to about 1.5 times the length Y2 of the protrusion 410 in the second direction. More specifically, the length Y5 from the light emitting device 200 to the extension 413 in the second direction may be about 1.1 to about 1.3 times the length Y2 of the protrusion 410 in the second direction. Here, the second direction length Y5 from the light emitting device 200 to the extension 413 may refer to the second direction length from the center of the light emitting device 200 to the extension 413.

[0061] For example, the length Y5 from the light emitting device 200 to the extension portion 413 in the second direction can be approximately 5 mm to approximately 14 mm. More specifically, the length Y5 from the light emitting device 200 to the extension portion 413 in the second direction can be approximately 6 mm to approximately 12 mm. When the length Y5 is less than approximately 5 mm, the light emitted from the light emitting device 200 may not be effectively delivered to the first reflective surface S11 of the convex portion 411. More specifically, due to the relatively short length Y5, the amount of light incident on the extension portion 413 may increase, and the number of reflections of the light emitted from the light emitting device 200 may increase. That is, the overall brightness of the lighting device 1000 may decrease due to frequent reflections in the lighting device 1000. Additionally, when the length Y5 exceeds approximately 14 mm, the light emitted from the light emitting device 200 may not be effectively delivered to the protrusion 410 corresponding to the light emitting device 200 in the second direction. Therefore, the overall brightness of the lighting device 1000 may decrease, and the brightness of the light L emitted to the second side surface S2 may be uneven depending on the region.

[0062] Therefore, considering the brightness and uniformity of the emitted light, it is preferable that the second directional length Y5 from the light emitting device 200 to the extension 413 satisfies the aforementioned range, and preferably satisfies the aforementioned ratio to the second directional length Y2 of the protruding portion 410. The extension 413 may include multiple outer surfaces. The outer surfaces of the extension 413 can reflect light emitted from the light emitting device 200 toward the first reflective surface S11. In addition, the outer surfaces of the extension 413 can reflect light reflected by the first reflective surface S11 toward the second side surface S2. In this case, the outer surface of the extension 413 closest to the third side surface S3 may be provided on the same plane as the third side surface S3. In addition, the outer surface of the extension 413 closest to the fourth side surface S4 may be provided on the same plane as the fourth side surface S4.

[0063] The resin layer 400 may include at least one concave portion 430 having a concave shape on the first side surface S1. The concave portion 430 may reflect light emitted from the light emitting surface 201 of the light emitting device 200, and may have a concave shape in a second direction, rather than along an imaginary first straight line. For example, the concave portion 430 may have a concave shape in the direction from the first straight line toward the second side surface S2, i.e., an upward concave shape (see reference). Figure 4 The concave portion 430 may be disposed between a plurality of protrusions 410. The concave portion 430 may be disposed between two adjacent protrusions 410 along a first direction (x-axis direction) to connect the two protrusions 410. When viewed from above, the concave portion 430 may have at least one of the following shapes: a semi-circular shape, a semi-elliptical shape, and an aspherical shape that is recessed relative to the light emitting surface 201.

[0064] The concave portion 430 can be disposed in a region that does not correspond to the light emitting device 200. For example, the concave portion 430 can be disposed in a region that does not correspond to the light emitting device 200 in the optical axis direction (second direction (y-axis direction)). More specifically, the concave portion 430 can be disposed in a region in the optical axis direction that corresponds to the region between the plurality of light emitting devices 200. The vertex of the concave portion 430 can overlap with the center of the region in the optical axis direction that corresponds to the region between the plurality of light emitting devices 200. The number of concave portions 430 can be different from the number of protruding portions 410. The number of concave portions 430 can be less than the number of protruding portions 410. More specifically, the number of concave portions 430 can be one less than the number of protruding portions 410 and the number of light emitting devices 200.

[0065] When three or more of the plurality of protruding portions 410 are provided, two or more concave portions 430 can be provided. In this case, the plurality of concave portions 430 can have shapes that are spaced apart and correspond to each other in a first direction. For example, the plurality of concave portions 430 can have the same length X3 in the first direction and the same length in the second direction. The length X3 of the concave portion 430 in the first direction can be shorter than the length X2 of the protruding portion 410 in the first direction. The length X3 of the concave portion 430 in the first direction can be shorter than the first spacing P1. That is, the length X3 of the concave portion 430 in the first direction can be shorter than the lengths of the convex portion 411 and the concave portion 430 in the first direction. In addition, the length X3 of the concave portion 430 in the first direction can be shorter than the length Y2 of the protruding portion 410 in the second direction. In addition, the length X3 of the concave portion 430 in the first direction can be shorter than the length Y3 of the convex portion 411 in the second direction and the length Y4 of the extension portion 413 in the second direction. The length X3 of the concave portion 430 in the first direction can be the shortest distance between the protruding portions 410 spaced apart in the first direction.

[0066] For example, the length X3 of the concave portion 430 in the first direction can be from about 0.5 mm to about 5 mm. More specifically, the length X3 of the concave portion 430 in the first direction can be from about 1 mm to about 3 mm. When the length X3 of each concave portion in the first direction is less than about 0.5 mm, the distance between the protruding portions 410 may be narrower, and therefore the light emitted from the light emitting device 200 may not be effectively delivered to the protruding portion 410 corresponding to the light emitting device 200 in the second direction. Therefore, the brightness of the light L emitted to the second side surface S2 may be uneven depending on the region. Furthermore, when the length X3 of each concave portion in the first direction exceeds about 5 mm, the first spacing P1 between the multiple light emitting devices 200 may increase, and the overall brightness of the lighting device 1000 may decrease, and uneven dark areas may form on the second side surface S2. Therefore, the length X3 of the concave portion 430 in the first direction preferably satisfies the above-described range.

[0067] The length of the concave portion 430 in the second direction can be shorter than the length X3 of the concave portion 430 in the first direction. Specifically, the length of the concave portion 430 in the second direction can be approximately 0.3 to approximately 0.7 times the length X3 of the concave portion 430 in the first direction. For example, the length of the concave portion 430 in the second direction can be approximately 0.5 mm to approximately 3 mm. Specifically, the length of the concave portion 430 in the second direction can be approximately 0.5 mm to approximately 2 mm. Here, the length of the concave portion 430 in the second direction can refer to the distance from the imaginary first straight line to the vertex of the concave portion 430 in the second direction. When the length of the concave portion 430 in the second direction does not satisfy the above-mentioned range or the above-mentioned ratio to the length X3 in the first direction, the brightness of the light L emitted to the second side surface S2 may be uneven depending on the region. That is, dark areas with relatively low brightness may be formed on the second side surface S2. Therefore, it is preferable that the second direction of the concave portion 430 satisfies the above-mentioned range and the above-mentioned ratio to the length X3 in the first direction.

[0068] The concave portion 430 may be spaced apart from the light emitting device 200 in the second direction, and in this case, the second direction length Y6 from the light emitting device 200 to the concave portion 430 may be longer than the second direction length Y2 of the protruding portion 410. Specifically, the second direction length Y6 from the light emitting device 200 to the concave portion 430 may be approximately 1.01 to 1.2 times the second direction length Y2 of the protruding portion 410. Here, the second direction length Y6 from the light emitting device 200 to the concave portion 430 may refer to the second direction length from the center of the light emitting device 200 to the apex of the concave portion 430.

[0069] For example, the length Y6 from the light emitting device 200 to the concave portion 430 in the second direction can be from about 3.5 mm to about 13 mm. More specifically, the length Y6 from the light emitting device 200 to the concave portion 430 in the second direction can be from about 5.5 mm to about 11 mm. When the length Y6 from the light emitting device 200 to the concave portion 430 in the second direction is less than about 3.5 mm, the reflection effect of the concave portion 430 on the light emitted from the light emitting device 200 may not be significant. Furthermore, when the length Y6 from the light emitting device 200 to the concave portion 430 in the second direction exceeds about 13 mm, the light emitted from the light emitting device 200 may not be effectively delivered to the protrusion 410 corresponding to the light emitting device 200 in the second direction. Therefore, the overall brightness of the lighting device 1000 may decrease, and the brightness of the light L emitted to the second side surface S2 may be uneven depending on the region. Therefore, considering both the brightness and uniformity of the emitted light, it is preferable that the length Y6 from the light emitting device 200 to the concave portion 430 in the second direction meets the aforementioned range. Preferably, the ratio is satisfied with the above-mentioned ratio to the length Y2 in the second direction.

[0070] The concave portion 430 may include a second reflective surface S12 defined as an outer surface. The second reflective surface S12 may be disposed between the first reflective surfaces S11. The second reflective surface S12 is the outer surface of the concave portion 430 and may be a surface constituting the first side surface S1. The second reflective surface S12 may be a surface connecting the outer surfaces of adjacent extension portions 413. The second reflective surface S12 may be disposed in a region corresponding to the region between the plurality of light emitting devices 200 in the optical axis direction (second direction (y-axis direction)). For example, the vertex of the second reflective surface S12 may overlap with the center of the region between the light emitting devices 200 in the optical axis direction. Since the concave portion 430 has the above-described shape, the second reflective surface S12 may include a curved surface. The second reflective surface S12 may be configured as a curved surface having a defined radius of curvature over the entire region. The radius of curvature of the second reflective surface S12 may be smaller than the radius of curvature of the first reflective surface S11. For example, the radius of curvature of the second reflective surface S12 may be from about 0.5 mm to about 5 mm. Specifically, the radius of curvature of the second reflective surface S12 can be from about 0.5 mm to about 3 mm. When the radius of curvature of the second reflective surface S12 is less than about 0.5 mm, light incident on the concave portion 430 can be effectively reflected, but the first direction length X3 of the concave portion 430 may be excessively shortened. Therefore, the brightness of the light L emitted to the second side surface S2 may be uneven depending on the region. In addition, when the radius of curvature of the second reflective surface S12 exceeds about 5 mm, the second reflective surface S12 may have difficulty effectively reflecting the light emitted from the light emitting device 200 along the set direction. Preferably, the radius of curvature of the second reflective surface S12, the length of the concave portion 430 in the second direction, and the length X3 of the concave portion 430 in the first direction can satisfy a ratio of 1:1:2 to prevent affecting the light reflection of the concave portion 430 and the brightness of the light emitted to the second side surface S2 and to prevent the formation of dark areas.

[0071] In other words, the concave portion 430 includes a second reflective surface S12 with a curved surface, and the horizontal width, defined as the length in the first direction (x-axis direction) of the concave portion 430, can vary depending on the distance from the light emitting device 200 along the optical axis. For example, the horizontal width of the concave portion 430 can increase with increasing distance from the light emitting device 200. Specifically, the horizontal width of the concave portion 430 can increase with increasing distance from the light emitting device 200 in the optical axis direction (second direction (y-axis direction)). That is, the horizontal width, defined as the length of the second reflective surface S12 in the first direction, can increase with increasing distance from the light emitting device 200 in the optical axis direction.

[0072] The lighting device 1000 according to the embodiment may include a plurality of protruding portions 410 facing the light emitting surface 201 of the light emitting device 200, and at least one concave portion 430 disposed between the plurality of protruding portions 410. In this case, the protruding portions 410 and the concave portions 430 may have a predetermined first directional length and a predetermined second directional length, and the light L emitted from the light emitting device 200 may be reflected on the protruding portions 410 and provided in the direction of the second side surface S2. For example, the light L emitted from the light emitting device 200 may be emitted in the direction of the first side surface S1, and the light L may be reflected on the first side surface S1 and provided in the direction of the second side surface S2. Specifically, the light L emitted from the light emitting device 200 may be reflected on the first reflective surface S11 of the protruding portion 410, which includes a curved surface, and the second reflective surface S12 of the concave portion 430, and emitted outward through the second side surface S2. That is, the lighting device 1000 may emit light in an indirect light manner, wherein the light emission direction of the device is opposite to the light emission direction of the light emitting device 200.

[0073] In this case, the lighting device 1000 may have a length in a second direction set for the uniformity of light emitted through the second side surface S2. For example, the second direction distance Y7 between the light emitting device 200 and the vertex of the protrusion 410 may be different from the second direction distance Y8 between the light emitting device 200 and the second side surface S2. Specifically, the second direction distance Y7 between the light emitting device 200 and the vertex of the first reflective surface S11 may be longer than the second direction distance Y8 between the light emitting device 200 and the second side surface S2. Here, the second direction distance Y7 between the light emitting device 200 and the vertex of the protrusion 410 refers to the second direction distance between the vertex of the protrusion 410 and the center of the light emitting device 200, and this second direction distance Y7 may be the same as the sum of the second direction distance Y2 of the protrusion 410 and the second direction length Y5 from the light emitting device 200 to the extension 413.

[0074] Furthermore, the second directional distance Y8 between the light emitting device 200 and the second side surface S2 can refer to the second directional distance from the center of the light emitting device 200 to the second side surface S2. The second directional distance Y8 between the light emitting device 200 and the second side surface S2 can be approximately 0.3 to 0.9 times the second directional distance Y7 between the light emitting device 200 and the vertex of the first reflecting surface S11. More specifically, the distance Y8 in the second direction can be approximately 0.5 to 0.8 times the distance Y7 in the second direction.

[0075] For example, the distance Y8 between the light emitting device 200 and the second side surface S2 in the second direction can be from about 7 mm to about 15 mm. More specifically, the distance Y8 between the light emitting device 200 and the second side surface S2 in the second direction can be from about 8 mm to about 12 mm. When the distance Y8 between the light emitting device 200 and the second side surface S2 in the second direction is less than about 7 mm, the light reflected from the first side surface S1 and provided towards the second side surface S2 may not ensure a sufficient light guiding distance. Therefore, the brightness of the light L emitted to the second side surface S2 may be uneven depending on the region. Furthermore, when the distance Y8 between the light emitting device 200 and the second side surface S2 in the second direction exceeds about 15 mm, the light L provided towards the second side surface S2 can ensure a light guiding distance, but the overall brightness of the lighting device 1000 may decrease due to the increased light travel path. Therefore, it is preferable that the distance Y8 between the light emitting device 200 and the second side surface S2 satisfies the aforementioned range and ratio.

[0076] Figure 5 and Figure 6 This view illustrates a lighting device according to an embodiment having a shape curved in multiple directions. The lighting device 1000 according to an embodiment may be configured to be curved in at least one of a first direction to a third direction (x, y, and z-axis directions). For example, at least one of the major and minor axes of the resin layer 400 may include curvature.

[0077] Reference Figure 5 The long axis (first direction) of the resin layer 400 may include curvature. Specifically, the lower surface S5 and upper surface S6 of the resin layer 400 may include curved surfaces with predetermined curvature. Accordingly, the lighting device 1000 may be arranged in a meandering shape in the first direction. (See reference...) Figure 6 The minor axis (second direction) of the resin layer 400 may include curvature. Specifically, the lower surface S5 and upper surface S6 of the resin layer 400 may include curved surfaces with predetermined curvature. Accordingly, the lighting device 1000 may be arranged in a meandering shape in the second direction. That is, the lighting device 1000 according to the embodiment may be arranged in a form in which at least one of the major and minor axes includes a straight line or a curve. Therefore, the lighting device 1000 can provide a line light source or surface light source with uniformity and high brightness by being arranged in a straight or curved shape on a substrate having various shapes.

[0078] The lighting device 1000 according to the embodiment can be applied to lamps, taking vehicle lamps as an example, such as headlights, side mirror lights, fog lights, taillights, brake lights, daytime running lights, vehicle interior lighting, door curtain lights, rear combination lights, or spare lights.

[0079] Figure 7 and Figure 8 This is a view illustrating the lamp used in the lighting device according to an embodiment. Figure 9 This diagram illustrates the shape of light emitted from a lamp according to an embodiment.

[0080] Reference Figures 7 to 9 The lamp may include the aforementioned lighting device 1000 and a housing 600 housing the lighting device 1000. One side of the housing 600 is open and may include a receiving space 650 located within the housing 600. The lighting device 1000 may be disposed within the receiving space 650. In this case, the lighting device 1000 may be configured to face the open side of the housing 600 with a second side surface S2, and a first side surface S1 may be configured to face the opposite side surface. That is, the open side of the housing 600 may be the light-emitting surface of the lamp. The receiving space 650 may have a shape corresponding to the shape of the lighting device 1000. Specifically, the height (z-axis direction) of the receiving space 650 may correspond to the height of the lighting device 1000. The inner surface of the receiving space 650 may be in direct contact with the upper and lower surfaces of the lighting device 1000. The other side of the receiving space 650 may have a shape corresponding to the shape of the lighting device 1000. Specifically, the other side surface of the receiving space 650 may have a shape corresponding to the shape of the first side surface S1. That is, the other side surface of the receiving space 650 may have a shape corresponding to the convex portion 411 or may have a concave-convex structure. The other side surface of the receiving space 650 may be in direct contact with the first side surface S1 of the lighting device 1000. Specifically, the other side surface of the receiving space 650 may be in direct contact with the first reflective surface S11.

[0081] The receiving space 650 may have a length in a first direction and a length in a second direction. The length of the receiving space 650 in the first direction may be greater than or equal to the length X1 of the lighting device 1000 in the first direction. For example, the length of the receiving space 650 in the first direction may be the same as the length X1 of the lighting device 1000 in the first direction. The length Y9 of the receiving space 650 in the second direction may be greater than or equal to the length Y1 of the lighting device 1000 in the second direction. More specifically, the length Y9 of the receiving space 650 in the second direction may be 1 to about 1.2 times the length Y1 of the lighting device 1000 in the second direction. More specifically, the length Y9 of the receiving space 650 in the second direction may be 1 to about 1.15 times the length Y1 of the lighting device 1000 in the second direction. For example, the length Y9 of the receiving space 650 in the second direction may be about 4 mm shorter than the length Y1 of the lighting device 1000 in the second direction. More specifically, the length Y9 of the receiving space 650 in the second direction may be about 3 mm shorter than the length Y1 of the lighting device 1000 in the second direction. More specifically, the difference between the length Y9 of the receiving space 650 in the second direction and the length Y1 of the lighting device 1000 in the second direction can be from 0 mm to approximately 2 mm. In this case, when the length difference Y9-Y1 is 0 mm, one end of the housing 600 can be disposed on the same plane as a side surface of the lighting device 1000, such as the second side surface S2, and the light emitting surface of the lamp can be disposed on the same plane as one end of the housing 600. Therefore, as Figure 9 As shown, the lamp can provide uniform light L, such as a uniform line light source or surface light source, to the area of ​​the open side of the housing 600. Furthermore, since the housing 600 is configured to surround the lighting device 1000, the lighting device 1000 can be concealed from the outside or minimized. Therefore, the lamp can have improved reliability.

[0082] Furthermore, the lamp according to the embodiment can minimize the length difference in the second direction between the lighting device 1000 and the receiving space 650. Therefore, the loss of light emitted from the lighting device 1000 due to reflection on the housing 600 can be minimized, and the lamp can be provided in a slimmer form. The housing 600 can contain a material with predetermined reliability. For example, the housing 600 can contain metallic materials and non-metallic materials such as resin or ceramic. The housing 600 can contain a material with excellent reflective properties, or can be provided in a color with excellent light reflective properties. Alternatively, a color with excellent reflective properties or excellent light reflective properties can be coated or deposited on the inner surface of the receiving space 650. Therefore, the housing 600 can prevent light loss by reflecting light emitted through at least one of the side surfaces of the resin layer 400 of the lighting device 1000—such as the first side surface S1, the third side surface S3, and the fourth side surface S4. Light loss can be prevented by reflecting light emitted through the side surfaces. In addition, the housing 600 can maximize the amount of light emitted through the light-emitting surface of the lamp by reflecting the light emitted through the side surface of the resin layer 400 toward the second side surface S2.

[0083] When the inner surface of the housing 600 exposed through the receiving space 650 has a light reflectivity higher than a set value, the second reflective layer 500 can be omitted, such as... Figure 8 As shown in the diagram. In this case, the upper surface S6 of the resin layer 400 can be configured to directly contact the inner surface of the housing 600. Furthermore, the light L emitted from the light emitting device 200 can be reflected on the inner surface of the housing 600 facing the upper surface S6 of the resin layer 400 and provided towards the second side S2. Therefore, the overall thickness of the lighting device 1000 can be reduced, and the lamp including the lighting device 1000 can be provided in a slimmer manner.

[0084] The lamp may also include a lens 700. The lens 700 may be disposed on the open side of the housing 600. The lens 700 may face the second side surface S2. The lens 700 may be a transparent lens that transmits light emitted from the lighting device 1000. The lens 700 may have a predetermined thickness and block the open side of the housing 600. For this purpose, the height of the lens 700 may be greater than or equal to the height of the receiving space 650. Additionally, the length of the lens 700 may be equal to or longer than the length of the receiving space 650 in the first direction. Therefore, the lens 700 may contact or separate from the lighting device 1000. For example, the lens 700 may be spaced apart from the second side surface S2 of the lighting device 1000 within a range of approximately 4 mm or less, or it may be in direct contact with the second side surface S2. Therefore, the lens 700 can effectively protect the lighting device 1000 disposed in the housing 600, and the light L emitted from the lighting device 1000 can pass through the lens 700 and be provided as a uniform line light source or surface light source.

[0085] Figure 10 This is a front view of the light emitting device applied to the lighting apparatus according to the embodiment, and Figure 11 This is a side view of a light emitting device applied to a lighting device according to an embodiment.

[0086] Reference Figure 10 and Figure 11 The light emitting device 200 includes a body 210 having a cavity 220, a plurality of lead frames 230 and 240 located in the cavity 220, and a light emitting chip 271 disposed on at least one of the plurality of lead frames 230 and 240. The light emitting device 200 can be implemented as a side-emitting package. The body 210 may include the cavity 220, and the lead frames 230 and 240 are exposed at the bottom of the cavity 220. The plurality of lead frames 230 and 240 are divided into, for example, a first lead frame 230 and a second lead frame 240 and connected to the body 210.

[0087] Body 210 may be formed of an insulating material. Body 210 may be formed of a reflective material. Body 210 may be formed of a material having a reflectivity higher than its transmittance relative to the wavelength emitted from the light-emitting chip—for example, having a reflectivity of 70% or higher. When the reflectivity is 70% or greater, body 210 may be defined as a non-transmissive or reflective material. Body 210 may be formed of a resin material, such as a resin-based insulating material, such as polyphthalamide (PPA). Body 210 may be formed of a silicone-based resin, an epoxy-based resin, or a thermosetting resin—including plastic materials or materials with high heat resistance and high light resistance. Body 210 comprises a white type of resin. Body 210 may be molded from at least one selected from the group consisting of epoxy resins, modified epoxy resins, silicone resins, modified silicone resins, acrylic resins, and urethane resins. For example, epoxy resins made from triglycidyl isocyanurate, hydrogenated bisphenol A diglycidyl ether, etc., and anhydrides made from hexahydroanhydrous phthalic acid, 3-methylhexahydroanhydrous phthalic acid, 4-methylhexahydroanhydrous phthalic acid, etc., can be used as epoxy resins by adding DBU (1,8-diazabicyclo(5,4,0)undecene-7) as a curing accelerator and adding ethylene glycol, titanium dioxide pigment, and glass fiber as co-catalysts, and partially curing by means of heating. The body 210 may suitably mix at least one selected from the group consisting of dispersants, pigments, fluorescent materials, reflective materials, light-blocking materials, light stabilizers, and lubricants with the thermosetting resin.

[0088] The body 210 may include a reflective material, such as a resin material with added metal oxides, and the metal oxides may include at least one of TiO2, SiO2, and Al2O3. The body 210 can effectively reflect incident light. As another example, the body 210 may be formed of a light-transmitting resin material or a resin material having a phosphor that converts the wavelength of the incident light. The bottom of the body 210 may be a side surface corresponding to the substrate 200.

[0089] The first lead frame 230 includes a first lead portion 231 disposed on the bottom of the cavity 220, a first connecting portion 232 extending to the outside of the body 210, and a first heat dissipation portion 233. The first connecting portion 232 can be bent from the first lead portion 231 within the body 210 and protrude to the outside of the body, and the first heat dissipation portion 233 can be bent from the first connecting portion 232.

[0090] The second lead frame 240 includes a second lead portion 241 disposed on the bottom of the cavity 220, a second connecting portion 242 disposed on the outer region of the body 210, and a second heat dissipation portion 243. The second connecting portion 242 can be bent from the second lead portion 241 within the body 210, and the second heat dissipation portion 243 can be bent from the second connecting portion 242.

[0091] Here, the light-emitting chip 271 can be disposed on the first lead portion 231 of the first lead frame 230, and can be connected to the first lead portion 231 and the second lead portion 241 by wires, or by adhesive. The light-emitting chip 271 can be a horizontal chip, a vertical chip, or a chip with a via structure. The light-emitting chip 271 can be mounted in a flip-chip manner. The light-emitting chip 271 can selectively emit light in the wavelength range from ultraviolet to visible light. The light-emitting chip 271 can be selected from, for example, ultraviolet LED chips, red LED chips, blue LED chips, green LED chips, and yellow-green LED chips. The light-emitting chip 271 can include at least one of group II-VI compounds and group III-V compounds. The light-emitting chip 271 can be formed from, for example, compounds selected from the group consisting of GaN, AlGaN, InGaN, AlInGaN, GaP, AlN, GaAs, AlGaAs, InP, and mixtures thereof.

[0092] One or more light-emitting chips 271 can be disposed in cavity 220, and can emit light of maximum intensity along the direction of the central axis Y0. Furthermore, one or more light-emitting chips of the light-emitting chips 271 can be disposed within the cavity.

[0093] A sealing member 280 is disposed in the cavity 220 of the body 210, and the sealing member 280 comprises a light-transmitting resin such as silicone resin or epoxy resin, and can be formed as a single layer or multiple layers. A phosphor for changing the wavelength of light emitted from the light-emitting chip 271 can be included on the sealing member 280 or the light-emitting chip 271, and the phosphor excites a portion of the light emitted from the light-emitting chip 271 to emit light of different wavelengths. The phosphor can optionally be formed of quantum dots, YAG, TAG, silicates, nitrides, and oxygen-nitrogen-based materials. The phosphor can include, but is not limited to, at least one of red phosphors, yellow phosphors, and green phosphors.

[0094] The emitting surface of the sealing member 280 is the light emitting surface 201 of the light emitting device 200, and can be formed in a flat shape, a concave shape, a convex shape, etc., but is not limited thereto. As another example, a light-transmitting film with a phosphor can be provided on the cavity 220, but is not limited thereto. A lens can also be formed on the upper portion of the body 210, and the lens can include a concave lens structure and / or a convex lens structure, and can adjust the light distribution of the light emitted by the light emitting device 200. Semiconductor devices such as light receiving devices or protection devices can be mounted on the body 210 or any of the lead frames, and the protection device can be implemented as a thyristor, a Zener diode, or a TVS (transient voltage suppressor), and the Zener diode protects the light emitting chip from ESD (electrostatic discharge).

[0095] At least one or more light emitting devices in the light emitting device 200 may be disposed on the substrate 200, and the first reflective layer 300 may be disposed around the lower portion of the light emitting device 200. The first lead portion 233 and the second lead portion 243 of the light emitting device 200 may be bonded to the pads 103 and 105 of the substrate 200 using solder or conductive tape as conductive bonding members 203 and 205.

[0096] Figures 12 to 14 This is a view illustrating an example of a lamp, including a lighting device according to an embodiment, applied to a vehicle. In detail, Figure 12 A top view of a vehicle equipped with lights. Figure 13 This is an example of a lighting device installed at the front of a vehicle according to an embodiment, and Figure 14 This is an example of a lighting device installed at the rear of a vehicle according to an embodiment.

[0097] Reference Figures 12 to 14 The lighting device 1000 according to the embodiment can be applied to a vehicle 2000. One or more lights can be provided on at least one of the front, rear, and side portions of the vehicle 2000. For example, see reference... Figure 13 The lamp, including the lighting device 1000, can be applied to the headlight 2100 of a vehicle. The headlight 2100 may include a first cover member 2110 and at least one first lamp module 2120 including the lamp. The first cover member 2110 accommodates the first lamp module 2120 and may be made of a light-transmitting material. The first cover member 2110 may be curved according to the design of the vehicle 2000 and may be configured to be flat or curved depending on the shape of the first lamp module 2120.

[0098] The headlight 2100 can provide a variety of functions by controlling the driving time of the lighting device 1000 included in the first lamp module 2120. For example, the headlight 2100 can provide at least one of the following functions: headlights, turn signals, daytime running lights, high-mounted lights, low-mounted lights, and fog lights, by using the light emitted from the lighting device 1000. In addition, the headlight 2100 can provide additional functions, such as welcome lights or celebratory effects when the driver opens the door.

[0099] Reference Figure 14 The lamp, including the lighting device 1000, can be applied to the rear light 2200 of a vehicle. The rear light 2200 may include a second cover member 2210 and at least one second lamp module 2220 including the lamp. The second cover member 2210 accommodates the second lamp module 2220 and may be made of a light-transmitting material. The second cover member 2210 may be curved depending on the design of the vehicle 2000 and may be configured to be flat or curved depending on the shape of the second lamp module 2220. The rear light 2200 can provide various functions by controlling the driving time of the lighting device 1000 included in the second lamp module 2220. For example, the rear light 2200 can provide at least one of the functions of a side light, brake light, and turn signal indicator by the light emitted from the lighting device 1000.

[0100] The features, structures, effects, etc., described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to one embodiment. Furthermore, the features, structures, effects, etc., illustrated in each embodiment can be combined or modified by those skilled in the art relative to other embodiments. Therefore, content related to these combinations and variations should be understood as being included within the scope of the present invention. Additionally, although described based on the above embodiments, these are merely examples and do not limit the present invention. It will be apparent to those skilled in the art that various modifications and applications, not shown, can be made without departing from the basic characteristics of this embodiment. For example, each component specifically shown in the embodiments can be modified and implemented. And differences related to these modifications and applications should be interpreted as being included within the scope of the present invention as defined by the appended claims.

Claims

1. A lighting device, comprising: substrate; A plurality of light emitting devices are arranged on the substrate along a first direction; A first reflective layer is disposed on the substrate; A resin layer, wherein the resin layer is disposed on the first reflective layer; as well as A second reflective layer is disposed on the resin layer. The resin layer includes a first side surface facing the light-emitting surfaces of the plurality of light-emitting devices, and a second side surface opposite to the first side surface. The first side surface includes a plurality of first reflective surfaces having a convex shape relative to the light emitting surface of each of the plurality of light emitting devices, and at least one second reflective surface having a concave shape relative to the light emitting surface of each of the plurality of light emitting devices. The plurality of first reflective surfaces are disposed on the region corresponding to each of the plurality of light emitting devices in the optical axis direction. The second reflective surface is disposed between the plurality of first reflective surfaces. The resin layer includes a plurality of protruding portions and at least one concave portion. The plurality of protruding portions protrude from the first side surface facing the light emitting surface of the light emitting device, and the concave portion has a concave shape on the first side surface. Each of the plurality of protruding portions is respectively disposed in a region corresponding to the plurality of light emitting devices along the optical axis. The concave portion is disposed between the plurality of protruding portions. Each of the plurality of protruding portions includes a convex portion having a convex shape relative to the light emitting surface of each light emitting device in the light emitting device, and an extension portion disposed between the convex portion and each light emitting device in the light emitting device. Wherein, each of the plurality of first reflective surfaces and the second reflective surface includes a curved surface. Wherein, the radius of curvature of the second reflective surface is smaller than the radius of curvature of each of the curved surfaces of the first reflective surface. Wherein, the vertex of each of the first reflective surfaces overlaps with the optical axis of each of the light emitting devices in a second direction perpendicular to the first direction. The extended portion extends in a straight line from both ends of the convex portion toward the second side surface in the second direction, and has a constant horizontal width, which is defined as the width in the first direction. Wherein, the length of the extended portion in the second direction is shorter than the maximum length of the convex portion in the second direction, and In this process, light emitted through the light emitting surface of each of the light emitting devices is guided through the resin layer and reflected by the first and second reflective surfaces of the first side surface, and the reflected light is guided through the resin layer and emitted through the second side surface of the resin layer.

2. The lighting device according to claim 1, wherein, The second reflective surface is disposed in the region corresponding to the region between the plurality of light emitting devices along the optical axis. Wherein, the length of the concave portion in the first direction is shorter than the maximum length of the convex portion in the second direction and the length of the extended portion in the second direction, and Wherein, the length of the extended portion along a straight line in the second direction is longer than the minimum distance between adjacent convex portions in the first direction.

3. The lighting device according to claim 2, wherein, The straight length of the extension in the second direction is in the range of 1 mm to 4 mm.

4. The lighting device according to claim 3, wherein, The radius of curvature of the first reflective surface is in the range of 4 mm to 15 mm.

5. The lighting device according to claim 3, wherein, The first reflective surface and the second reflective surface have a horizontal width, which is defined as the width in the first direction perpendicular to the optical axis. Wherein, the maximum horizontal width of the first reflective surface is greater than the horizontal width of the second reflective surface, and Wherein, the maximum horizontal width of the first reflective surface is greater than the horizontal width of each of the light emitting devices in the light emitting device.

6. The lighting device according to claim 3, wherein, The resin layer includes a third side surface and a fourth side surface disposed between the first side surface and the second side surface. The third side surface and the fourth side surface face each other. The plurality of protruding portions have a shape that protrudes along the second direction rather than along an imaginary first straight line, the imaginary first straight line connecting one end of the third side surface and one end of the fourth side surface, and... The concave portion has a concave shape in the second direction rather than in the imaginary first straight line.

7. The lighting device according to any one of claims 1 to 6, wherein, The distance from each of the light emitting devices to each of the first reflective surfaces in the optical axis direction is longer than the distance from each of the light emitting devices to the second side surface in the optical axis direction.

8. A lighting device, comprising: substrate; Multiple light emitting devices are disposed on the substrate; A first reflective layer is disposed on the substrate; A resin layer, wherein the resin layer is disposed on the first reflective layer; as well as A second reflective layer is disposed on the resin layer. The resin layer includes a first side surface facing the light-emitting surfaces of the plurality of light-emitting devices, and a second side surface opposite to the first side surface. The resin layer includes a plurality of protruding portions and a concave portion disposed between the plurality of protruding portions. The plurality of protruding portions protrude from the first side surface. Each of the plurality of protruding portions is disposed in a region corresponding to the plurality of light emitting devices along the optical axis. The first side surface includes a plurality of first reflective surfaces with convex shapes and at least one second reflective surface with concave shapes. Each of the protruding portions includes a convex portion having a convex shape relative to the light emitting surface of each light emitting device in the light emitting device, and an extension portion disposed between the convex portion and each light emitting device in the light emitting device. The second side surface is a light-emitting surface and extends along the first direction. The first side surface and the second side surface face each other in a second direction orthogonal to the first direction. The resin layer includes a third side surface and a fourth side surface disposed between the first side surface and the second side surface. The third side surface is a side surface that connects one end of the first side surface and one end of the second side surface. The fourth side surface is the side surface that connects the other end of the first side surface and the other end of the second side surface. Each of the plurality of protruding portions has a shape that protrudes along the second direction rather than along an imaginary first straight line, the imaginary first straight line connecting one end of the third side surface and one end of the fourth side surface. Each of the plurality of protruding portions has a convex curved surface. The concave portion has a concave curved surface. The concave portion has a concave shape in the second direction, rather than in the imaginary first straight line. The extended portion extends in a straight line from both ends of the convex curved surface toward the second side surface in the second direction, and has a constant horizontal width, which is defined as the width in the first direction. In this process, light emitted through the light emitting surface of each of the light emitting devices is guided through the resin layer and reflected by the first and second reflective surfaces of the first side surface, and the reflected light is guided through the resin layer and emitted through the second side surface of the resin layer.

9. The lighting device according to claim 8, wherein, The convex portion has a horizontal width, defined as the width in the first direction perpendicular to the optical axis direction or the second direction, and The horizontal width of the convex portion decreases as the distance from the light emitting device increases.

10. The lighting device according to claim 9, wherein, The length of the extended portion along the straight line in the second direction is shorter than the maximum length of the convex portion in the optical axis direction. Wherein, the length of the extended portion along a straight line in the second direction is longer than the minimum distance between adjacent convex portions in the first direction, and The length of the extended portion along a straight line in the second direction is in the range of 1 mm to 4 mm.

11. A lamp, comprising: A housing, one side of which is open and has a receiving space located within the housing; A lens, the lens being disposed on the open side of the housing; as well as A lighting device, wherein the lighting device is disposed in the receiving space of the housing. The lighting device includes the lighting device selected from claim 1 or claim 10. The second side surface of the lighting device is configured as an open side facing the housing, and provides a linear light source or a surface light source. The height of the lens is equal to or greater than the height of the receiving space.

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