Lighting device

Abstract

The lighting device disclosed in the embodiment of the present application includes a substrate, a light emitting device disposed on the substrate, a reflective layer disposed on the substrate, a resin layer disposed on the reflective layer, and a light control member disposed on the resin layer, wherein the light control member includes a first base material disposed on the resin layer, a second base material disposed on the first base material, and a first adhesive member disposed between the first base material and the second base material, and includes a first air gap formed in a region between the first base material and the second base material where the first adhesive member is not disposed, and the number of the first air gap can be greater than or equal to the number of the light emitting device.

Description

Technical Field

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

[0002] Lighting devices are instruments that provide or control the amount of light and are used in a variety of fields. For example, lighting devices can be applied to various areas 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. 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 compared to conventional light sources such as fluorescent lamps and incandescent lamps. Such LEDs are being used in various optical components, such as various display devices, indoor lamps, or outdoor lamps. Typically, lamps of various colors and shapes are used in vehicles, and recently, lamps using LEDs have been proposed as light sources for vehicles. For example, LEDs are being used in vehicle headlights, taillights, turn signals, signs, etc. However, such LEDs have the problem of a relatively small emission angle. For this reason, when LEDs are used as vehicle lamps, there is a need to increase the luminous area of ​​the lamp. Furthermore, when a lamp includes an LED, there is a problem of hot spots formed by the light emitted from the LED. When such lamps are used to achieve a surface light source, there is a problem of deterioration in the uniformity of the luminous surface. Therefore, a new lighting device and lamp that can solve the above problems is needed. Summary of the Invention

[0003] Technical issues

[0004] Embodiments of the present invention provide a lighting device and lamp with improved illuminance. Embodiments of the present invention also provide a lighting device and lamp capable of achieving a uniform line light source or area light source.

[0005] Technical solution

[0006] The lighting device according to an embodiment of the present invention includes a substrate, a light-emitting device disposed on the substrate, a reflective layer disposed on the substrate, a resin layer disposed on the reflective layer, and a light control member disposed on the resin layer. The light control member includes a first substrate disposed on the resin layer, a second substrate disposed on the first substrate, and a first adhesive member disposed between the first substrate and the second substrate. The region between the first substrate and the second substrate includes a first air gap formed in a region where the first adhesive member is not disposed, and the number of first air gaps may be greater than or equal to the number of light-emitting devices.

[0007] According to embodiments of the present invention, the number of first air gaps is set to be multiple, the number of first air gaps being greater than the number of light-emitting devices, and the width of each of the multiple first air gaps in the horizontal direction may be smaller than the width of the light-emitting device in the horizontal direction. A portion of the multiple first air gaps may be disposed in a region overlapping with the light-emitting devices in the vertical direction. The light control component may further include a third substrate disposed on a second substrate, and a second adhesive component disposed between the second substrate and the third substrate, and the region between the second substrate and the third substrate includes second air gaps formed in a region where the second adhesive component is not disposed, and the number of each of the first air gaps and the second air gaps may be equal to the number of light-emitting devices. The first air gaps and the second air gaps may have the same shape and width in the horizontal direction.

[0008] According to an embodiment of the present invention, a light-shielding member is disposed between a third substrate and a second air gap, and the width of the light-shielding member in the horizontal direction may be smaller than the widths of the first air gap and the second air gap in the horizontal direction. The centers of the first air gap and the second air gap may overlap with the optical axis of the light-emitting device in the vertical direction. The center of the first air gap may be spaced apart from the optical axis of the light-emitting device in the horizontal direction, and the center of the second air gap may overlap with the optical axis of the light-emitting device in the vertical direction. According to an embodiment of the present invention, a light-shielding member is disposed between a second substrate and a first air gap, and the width of the light-shielding member in the horizontal direction may be greater than the width of the first air gap in the horizontal direction.

[0009] The lighting device according to an embodiment of the present invention includes a substrate, a light-emitting device disposed on the substrate, a reflective layer disposed on the substrate, a resin layer disposed on the reflective layer, and a light control component disposed on the resin layer. The light control component may include a first substrate disposed on the resin layer, a second substrate disposed on the first substrate, and a first adhesive component disposed between the first substrate and the second substrate. The region between the first substrate and the second substrate includes a first air gap formed in the region where the first adhesive component is not disposed. The light-emitting surface of the light-emitting device faces the side surface of the resin layer, and the number of first air gaps may be greater than or equal to the number of light-emitting devices.

[0010] According to embodiments of the present invention, a plurality of first air gaps are provided, the number of first air gaps being greater than the number of light-emitting devices, and the width of each of the plurality of first air gaps in the horizontal direction may be smaller than the width of the light-emitting device in the horizontal direction. A portion of the plurality of first air gaps may be disposed in a region overlapping with the light-emitting device in the vertical direction. The width of the plurality of first air gaps in the horizontal direction may decrease as the distance from the light-emitting device increases. The width of each of the plurality of first air gaps in the horizontal direction may vary from the first substrate toward the second substrate.

[0011] Beneficial effects

[0012] The lighting device and lamp according to embodiments of the present invention can have improved light characteristics. Specifically, the lighting device and lamp may include a light control member in which at least one air gap corresponding to a light-emitting device is formed in a single layer or multiple layers. Therefore, the light control member can control the path of light incident on it, and in this process, can prevent the formation of hot spots where light from the light-emitting device is concentrated. Thus, the lighting device and lamp according to the embodiments can minimize light loss during the emission of light from the light-emitting device to the outside, and can be implemented as a uniform line light source or a surface light source.

[0013] The lighting device and lamp according to embodiments of the present invention have improved brightness and can more effectively prevent hot spot formation. Specifically, the embodiments include a light-shielding sheet disposed in an area corresponding to the light-emitting device to prevent concentration of emitted light. In this case, the embodiments can minimize the area and size of the light-shielding member formed by a light control member including at least one air gap. Therefore, the lighting device and lamp according to the embodiments can minimize light loss due to the light-shielding member, thereby having improved brightness. Attached Figure Description

[0014] Figure 1 This is a side sectional view of a lighting device according to a first embodiment of the present invention.

[0015] Figure 2 yes Figure 1 A plan view of the reflective layer of the lighting device.

[0016] Figure 3 It is based on Figure 1 A top view of the lighting fixture.

[0017] Figure 4 This is a side sectional view of a lighting device according to a second embodiment of the present invention.

[0018] Figure 5 yes Figure 4 A top view of the lighting fixture.

[0019] Figure 6 , Figure 7 , Figure 8 and Figure 9 This is a side sectional view showing another example of a lighting device according to a second embodiment of the present invention.

[0020] Figure 10 This is a side sectional view of a lighting device according to a third embodiment of the present invention.

[0021] Figure 11 This is the invention Figure 10 A top view of the lighting fixture.

[0022] Figure 12 This is a side sectional view of a lighting device according to a fourth embodiment of the present invention.

[0023] Figure 13 yes Figure 12 A top view of the lighting fixture.

[0024] Figure 14 and Figure 15 This is a side sectional view showing another example of a lighting device according to a fourth embodiment of the present invention.

[0025] Figure 16 This is a top view of a vehicle having lamps including a lighting device according to an embodiment of the present invention.

[0026] Figure 17 yes Figure 16 An example of a vehicle's front lighting system.

[0027] Figure 18 yes Figure 16 Example of a vehicle's rear lighting device. Detailed Implementation

[0028] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] The technical spirit of this invention is not limited to the embodiments described herein, and it can be implemented in various other forms. Furthermore, one or more components may be selectively combined and substituted among embodiments if within the scope of the technical spirit of this invention. In addition, the terminology (including technical and scientific terms) used in the embodiments of this invention, unless specifically defined and explicitly described, may be interpreted in the sense that is generally understood by one of ordinary skill in the art to which this invention pertains, and general terms, such as those defined in a dictionary, should be interpretable in the context of the relevant art. Furthermore, the terminology used in the embodiments of this invention is for describing embodiments and not for limiting the invention. In this specification, singular forms may also include plural forms unless otherwise specifically stated in the phrase, and where at least one (or more) of A and / or B, C is stated, it may include one of all combinations that can be combined with A, B, and C. Components of embodiments of this invention may be described using terms such as first, second, A, B, (a), and (b). Such terms are used only to distinguish components from other components and are not determined by their nature, order, or sequence. Furthermore, when a component is described as being "connected," "joined," or "engaged" to another component, this description can include not only cases where the component is directly connected, joined, or engaged to another component, but also cases where the component is "connected," "joined," or "engaged" through another component between the two components. Additionally, when each component is described as being formed or positioned "above" or "below," "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or positioned between the two components. Furthermore, when expressed as "above" or "below," it can include not only a downward direction relative to a component, but also an upward direction relative to a component.

[0030] The lighting device according to the present invention can be applied to various lighting devices requiring illumination, such as automotive lights, household optical components, and industrial optical components. For example, when applied to automotive lights, it can be used for headlights, side mirror lights, side marker lights, fog lights, taillights, brake lights, daytime running lights, vehicle interior lights, door lights, rear combination lights, backup lights, etc. Furthermore, when applied to automotive lights, it is suitable for rear side assist systems (BSD) installed in rearview mirrors or A-pillars, etc. Additionally, the optical components of the present invention can be applied to indoor and outdoor advertising devices, display devices, and various electric vehicle fields. Moreover, it can be applied to all lighting-related or advertising-related fields currently being developed and commercialized, or those that can be implemented according to future technological developments.

[0031] Furthermore, prior to the description of embodiments of the present invention, the first direction may refer to the x-axis direction shown in the accompanying drawings, and the second direction may be a direction different from the first direction. For example, the second direction may refer to the v-axis direction shown in the accompanying drawings, which is perpendicular to the first direction. 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 v-axis directions in the accompanying drawings, and the vertical direction may be the z-axis direction in the accompanying drawings and may be a direction perpendicular to both the x-axis and v-axis directions.

[0032] <First Embodiment>

[0033] Figure 1 This is a side sectional view of a lighting device according to a first embodiment of the present invention. Figure 2 yes Figure 1 A plan view of the reflective layer of the lighting device. Figure 3 yes Figure 1 A top view of the lighting fixture.

[0034] Reference Figures 1 to 3 According to an embodiment of the present invention, the lighting device 1000 may include a substrate 100, a light-emitting device 200, a reflective layer 300, a resin layer 400, and a light control component 500. The lighting device 1000 can emit light emitted from the light-emitting device 200 as a surface light source. 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 on the substrate 100.

[0035] Substrate 100 may include a printed circuit board (PCB). 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 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. Furthermore, substrate 100 may include a light-transmitting material. Specifically, substrate 100 may include a material through which light transmits through its upper and lower surfaces. Substrate 100 may include at least one of polyethylene terephthalate (PET), polystyrene (PS), polyimide (PI), polyethylene naphthalate (PEN), and polycarbonate (PC). Substrate 100 may be electrically connected to the light-emitting device 200. Substrate 100 includes a wiring layer (not shown) thereon, and the wiring layer may be electrically connected to the light-emitting device 200. When multiple light-emitting devices 200 are disposed on substrate 100, the multiple light-emitting devices 200 may be connected in series, parallel, or series-parallel via the wiring layer. The substrate 100 can function as a substrate or support member disposed below the light-emitting device 200 and the resin layer 400.

[0036] The light-emitting device 200 can be disposed on the substrate 100. The light-emitting device 200 is an LED chip that emits light from at least five sides and can be disposed on the substrate 100 in a flip-chip configuration. The light-emitting device 200 can emit at least one of visible light, such as blue, red, green, and yellow, ultraviolet (UV) light, and infrared light. As described above, the light-emitting device 200 includes multiple light-emitting surfaces, and the strongest light can be emitted towards the upper surface facing the light control member 500, which will be described later.

[0037] The light-emitting device 200 can be a horizontal chip or a vertical chip. In a horizontal chip, two different electrodes can be arranged in the horizontal direction, and in a vertical chip, two different electrodes can be arranged in the vertical direction. Since the light-emitting device 200 is connected to another chip or wiring pattern by wires in the case of a horizontal or vertical chip, the thickness of the module may increase due to the height of the wires, and pad space may be required for bonding the wires. The light-emitting device 200 is a device having a light-emitting diode (LED) and can be included in a package in which the light-emitting chip is encapsulated. The light-emitting chip can emit at least one of visible light, ultraviolet (UV) light, such as blue light, red light, green light, and yellow light, and the light-emitting device 200 can emit at least one of visible light, ultraviolet light, and infrared light, such as white light, blue light, red light, yellow light, and green light. The light-emitting device 200 can be a top-view type with the light-emitting surface 201 facing upwards. That is, the optical axis OA of the light-emitting device 200 can be perpendicular to the upper surface of the substrate 100. Multiple 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) can be disposed on the substrate 100. Furthermore, a plurality of light-emitting devices 200 spaced apart in a second direction (y-axis direction) can be disposed on the substrate 100. In this case, the plurality of light-emitting devices 200 can be spaced apart from each other in the horizontal direction by a first spacing P1. Here, the first spacing P1 can refer to the spacing between the centers of the plurality of light-emitting devices 200. 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 band toward the light control member 500. Alternatively, the plurality of light-emitting devices 200 can emit light of different wavelength bands. For example, some of the plurality of light-emitting devices 200 can emit light of the first wavelength band, while the remainder or other portions can emit light of a second wavelength band different from the first wavelength band. Therefore, the lighting device 1000 can provide light of various wavelength bands using a single device.

[0038] 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 emits light from five surfaces, the light-emitting surface 201 may be the upper surface (the surface facing the light control member 500), which is the surface from which the relatively strongest light is emitted. Additionally, when the light-emitting device 200 is in a top-view configuration, the light-emitting surface 201 may be the upper surface of the light-emitting device 200 facing the light control member 500. That is, the light-emitting surface 201 may refer to the surface that emits the highest intensity light toward the light control member 500. The light-emitting surface 201 may be formed in a plane parallel to the reflective layer 300 and may include concave or convex surfaces. Light emitted from the light-emitting device 200 may travel toward the upper surface of the resin layer 400. Furthermore, a portion of the emitted light may be reflected by the reflective layer 300 and travel toward the upper surface of the resin layer 400.

[0039] A reflective layer 300 may be disposed on the substrate 100. The reflective layer 300 may be disposed between the substrate 100 and the resin layer 400. The reflective layer 300 may be provided in the form of a film having a metallic or non-metallic material. The reflective layer 300 may be adhered to the upper surface of the substrate 100. The reflective layer 300 may be adhered between the resin layer 400 and the substrate 100, but is not limited thereto. The reflective layer 300 may have an area smaller than the area of ​​the upper surface of the substrate 100. The reflective layer 300 may be spaced apart from the edge of the substrate 100. The resin layer 400 may be disposed in the region between the reflective layer 300 and the edge of the substrate 100 and adhered to the substrate 100. Therefore, peeling of the edge portion of the reflective layer 300 can be prevented.

[0040] The reflective layer 300 may include an opening 301 in which the lower portion of the light-emitting device 200 is disposed. A portion of the upper surface of the substrate 100 that is exposed and the lower portion of the light-emitting device 200 that is bonded may be disposed within the opening 301 of the reflective layer 300. The size of the opening 301 may be equal to or larger than the size of the light-emitting device 200, but is not limited thereto. The reflective layer 300 may be formed with a thickness less than that of the light-emitting device 200. The thickness of the reflective layer 300 may include a range of 0.2 mm ± 0.02 mm. The lower portion of the light-emitting device 200 may be disposed on the substrate 100 through the opening 301 of the reflective layer 300, and the upper portion of the light-emitting device 200 may protrude beyond the upper surface of the opening 301. The emitting surface of the light-emitting device 200 may be disposed in a direction perpendicular to the upper surface of the reflective layer 300.

[0041] The reflective layer 300 may comprise a metallic or non-metallic material. The metallic material may include metals such as aluminum, silver, or gold. The non-metallic material may comprise a plastic or resin material. The plastic material may be any one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polybiphenyl chloride, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polybutylene terephthalate, polyethylene naphthalate, polyamide, polyacetal, polyphthalic acid, polyimide, polyetherimide, polyetherketone, polyimide, polytetrafluoroethylene, liquid crystal polymers, fluororesins, copolymers thereof, and mixtures thereof. Reflective materials such as TiO2, Al2O3, or SiO2 may be added to silicon or epoxy resin as resin materials. The reflective layer 300 may be implemented as a single layer or multiple layers, and such a layer structure can improve light reflection efficiency. According to embodiments of the present invention, the reflective layer 300 can increase the amount of light by reflecting incident light to achieve uniform light distribution. Here, the reflective layer 300 can be omitted when a highly reflective material is coated on the upper surface of the substrate 100. As another example, the reflective layer 300 may include multiple reflectors (not shown). The reflectors may be air bubbles or a medium with a refractive index equal to that of air. The reflective layer 300 may reflect light incident through the multiple reflectors or refract it in different directions.

[0042] The reflective layer 300 may include a reflective pattern 310. The reflective pattern 310 may have multiple dot shapes. Multiple reflective patterns 310 may be disposed on the upper surface of the reflective layer 300. For example, the multiple reflective patterns 310 may be disposed in a manner that protrudes from the upper surface of the reflective layer 300. The multiple reflective patterns 310 may be spaced apart from the light-emitting device 200 and may be arranged to surround the lower part of the light-emitting device 200.

[0043] Multiple reflective patterns 310 can be formed on the reflective layer 300 by printing. The multiple reflective patterns 310 may include reflective ink. The multiple reflective patterns 310 can be printed using any of the following materials: TiO2, CaCO3, BaSO4, Al2O3, silicon, and PS. Each of the multiple reflective patterns 310 may have a planar shape selected from circular, elliptical, and polygonal shapes. Each of the multiple reflective patterns 310 may have a hemispherical or polygonal shape in its side profile. The material of the multiple reflective patterns 310 may be white. The dot pattern density of the reflective patterns 310 may increase with increasing distance from the light-emitting device 200. For example, the dot pattern density per unit area of ​​the reflective patterns 310 may increase with increasing distance in the horizontal direction from the optical axis OA of the light-emitting device 200. The size of the multiple reflective patterns 310 may change with increasing distance from the light-emitting device 200. For example, the width of the multiple reflective patterns 310 in the horizontal direction may increase with increasing distance in the horizontal direction from the optical axis OA of the light-emitting device 200. In other words, multiple reflective patterns 310 are arranged 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 to other components, so as to improve light reflectivity, reduce light loss and improve the brightness of the surface light source.

[0044] A resin layer 400 may be disposed on a substrate 100. The resin layer 400 may face the substrate 100. The resin layer 400 may be disposed on the entire upper surface or a portion thereof of the substrate 100. The resin layer 400 may seal the light-emitting device 200 onto the upper surface of the substrate 100. The resin layer 400 may contact the side and upper surfaces of each of the light-emitting devices 200. The lower surface area of ​​the resin layer 400 may be equal to or greater than the upper surface area of ​​the substrate 100. The resin layer 400 may be formed of a transparent material. The resin layer 400 may include resin materials such as silicone resin or epoxy resin. The resin layer 400 may include thermosetting resin materials, such as, optionally, PC, OPS, PMMA, PVC, etc. The resin layer 400 may be formed of glass, but is not limited thereto. For example, a resin material containing urethane acrylate oligomers as the main material may be used as the main material of the resin layer 400. For example, a mixture of synthetic oligomers, urethane acrylate oligomers, and polyacrylic acid polymers may be used. Of course, it can further include monomers mixed with low-boiling-point dilute reactive monomers such as IBOA (isobornyl acrylate), HPA (hydroxypropyl acrylate, 2-HEA (2-hydroxyethyl acrylate)), and can also be mixed with photoinitiators (such as 1-hydroxycyclohexylphenyl ketone) or antioxidants.

[0045] Since the resin layer 400 is configured as a layer for guiding light with resin, it can be thinner than glass and can be configured as a flexible sheet. The resin layer 400 can emit point light emitted from the light-emitting device 200 in the form of a line light source or a surface light source. The upper surface of 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 beads (not shown), and the beads diffuse and reflect the incident light to increase the light intensity. The beads can be set in the range of 0.01 to 0.3% based on the weight of the resin layer 400. The beads can be composed of any one selected from silicon, silica, glass bulb, PMMA (polymethyl methacrylate), urethane, Zn, Zr, Al2O3, and acrylic acid, and the particle size of the beads can be in the range of about 1 μm to about 20 μm, but is not limited thereto. A line light source is a type of light in which light emitted from one or more light-emitting devices is emitted through at least one side surface of a resin layer 400, and the height or thickness of the at least one side surface from which the light is emitted can be less than 3 times or less than 2.5 times the thickness of the light-emitting device. A surface light source is a type of light in which light emitted from light-emitting devices arranged in a horizontal direction and at least one light-emitting device arranged in a vertical direction is emitted over an area tens or hundreds of times larger than the area of ​​the upper surface of the light-emitting device.

[0046] Since the resin layer 400 is disposed on the light-emitting device 200, it can protect the light-emitting device 200 and reduce the loss of light emitted from the light-emitting device 200. The light-emitting device 200 can be embedded under the resin layer 400. 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 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 reflective layer 300. Therefore, since a portion of the resin layer 400 is in contact with the substrate 100, the reflective layer 300 can be fixed between the resin layer 400 and the substrate 100.

[0047] The resin layer 400 can be formed with a thickness greater than that of the light-emitting device 200. For example, the thickness h1 of the resin layer 400 can be about 1 mm or more. Specifically, the thickness h1 of the resin layer 400 can be from about 1 mm to about 10 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, it may be difficult for the light source module 1000 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 reflective layer 300 may be reduced. Furthermore, when the thickness of the resin layer 400 exceeds about 10 mm, light loss may occur due to the increased movement path of the light emitted from the light-emitting device 200, and the brightness of the surface light may be reduced. Therefore, the thickness of the resin layer 400 can be within the above range to provide uniform surface light. The vertical height from the upper surface of the resin layer 400 to the upper surface of the light-emitting device 200 can be greater than the thickness of the light-emitting device 200. For example, the height from the upper surface of the resin layer 400 to the upper surface of the light-emitting device 200 can be approximately 3 to approximately 15 times the thickness of the light-emitting device 200. The thicknesses of the resin layer 400 and the light-emitting device 200 can satisfy the above range in order to effectively guide the point light emitted from the light-emitting device 200 and emit it in the form of a line light source or a surface light source.

[0048] A light control component 500 may be disposed on the resin layer 400. The light control component 500 may be disposed on the upper surface of the resin layer 400. The light control component 500 may include a first substrate 511, a second substrate 512, and a first adhesive component 531. The first substrate 511 may be disposed on the upper surface of the resin layer 400. The first substrate 511 may be disposed on the entire upper surface of the resin layer 400. The lower surface area of ​​the first substrate 511 may be the same as the upper surface area of ​​the resin layer 400. The lower surface of the first substrate 511 may be in contact with the upper surface of the resin layer 400. The first substrate 511 may include a light-transmitting material. For example, the first substrate 511 may include at least one of polyethylene terephthalate (PET), polystyrene (PS), polyimide (PT), polyethylene naphthalate (PEN), and polycarbonate (PC). The first substrate 511 may have a predetermined thickness. For example, the thickness of the first substrate 511 may be less than about 150 μm. Specifically, the thickness of the first substrate 511 can be about 100 μm or less. More specifically, the thickness of the first substrate 511 can be about 20 μm to about 100 μm. The first substrate 511 can be provided in the form of a light-transmitting film having a set thickness. The first substrate 511 can be a first light-transmitting film disposed on the upper surface of the resin layer 400.

[0049] The second substrate 512 may be disposed on the upper surface of the first substrate 511. The second substrate 512 may include a light-transmitting material. For example, the second substrate 512 may include at least one of polyethylene terephthalate (PET), polystyrene (PS), polyimide (PI), polyethylene naphthalate (PEN), and polycarbonate (PC). The second substrate 512 may be a second light-transmitting film disposed on the first substrate 511 or the first light-transmitting film. The second substrate 512 may be provided with the same material as the first substrate 511. For example, the first light-transmitting film and the second light-transmitting film may be formed of the same material. The second substrate 512 may have a predetermined thickness. For example, the second substrate 512 may have a thickness of about 150 μm or less. More specifically, the second substrate 512 may have a thickness of about 100 μm or less. More specifically, the second substrate 512 may have a thickness of about 20 μm to about 100 μm. The second substrate 512 may be provided in the form of a light-transmitting film having a predetermined thickness. The second substrate 512 can be configured to have the same thickness as the first substrate 511. For example, the first light-transmitting film and the second light-transmitting film can have the same thickness.

[0050] A first adhesive member 531 may be disposed between a first substrate 511 and a second substrate 512. The first adhesive member 531 may be an adhesive layer for bonding the first substrate 511 and the second substrate 512. The first adhesive member 531 may be formed of a light-transmitting material. For example, the first adhesive member 531 may include adhesive materials such as thermosetting PSA, thermosetting adhesive, UV-curable PSA, UV adhesive, silicone resin, or epoxy resin. The first adhesive member 531 may be disposed in a designated area. For example, the first adhesive member 531 may be disposed in a portion of the area between the first substrate 511 and the second substrate 512, and a first air gap 551 may be formed in the remaining area where the first adhesive member 531 is not disposed. The first air gap 551 may be a region between the first substrate 511 and the second substrate 512 surrounded by the first adhesive member 531. The first air gap 551 may have a hole shape extending between the first substrate 511 and the second substrate 512. The first air gap 551 is formed as an air layer or a vacuum layer, and at least one or more first air gaps 551 may be disposed in the region between the first substrate 511 and the second substrate 512.

[0051] The first air gap 551 can form a first reflective surface 531S, which can be a side surface of the first adhesive member 531. Specifically, the first reflective surface 531S can be a side surface of the first adhesive member 531 exposed by the first air gap 551. The first reflective surface 531S can be perpendicular to the upper surface of the first substrate 511. Alternatively, the first reflective surface 531S can be tilted to have a predetermined tilt angle with the upper surface of the first substrate 511. The first reflective surface 531S can reflect light incident on the surface formed by the refractive index difference between the first air gap 551 and the first adhesive member 531. Therefore, the light control member 500 refracts and reflects light emitted from the light-emitting device 200 in a predetermined direction, thereby preventing hotspot phenomena caused by light concentration.

[0052] The number of first air gaps 551 can be greater than the number of light-emitting devices 200. That is, one light-emitting device 200 can correspond to multiple first air gaps 551. The multiple first air gaps 551 can be spaced apart from each other in the region between the first substrate 511 and the second substrate 512. In this case, the multiple first air gaps 551 can be spaced at regular intervals, and the distance between the multiple first air gaps 551 can be from about 0.1 mm to about 1 mm. The multiple first air gaps 551 can have a defined shape. For example, when viewed from above, the first air gaps 551 can have various shapes, such as polygons, circles, and ellipses. The multiple first air gaps 551 can have the same shape as each other. For example, the top shape of the multiple first air gaps 551 can be as follows: Figure 3The diagram shows a circle. Multiple first air gaps 551 can have a defined width. For example, the width of the first air gap 551 in the horizontal direction (x-axis or v-axis direction) can be less than the width d1 of the light-emitting device 200 in the horizontal direction. For example, the horizontal width of the first air gap 551 can be from about 0.1 mm to about 1 mm. Multiple first air gaps 551 can have the same horizontal width as each other. Additionally, each of the multiple first air gaps 551 can have a constant width. For example, the width of the multiple first air gaps 551 can be a constant width that does not change from the first substrate 511 towards the second substrate 512. That is, the cross-sectional shape of the first air gap 551 can be a rectangular shape with a constant width. Multiple first air gaps 551 can be positioned at defined locations. Specifically, the multiple first air gaps 551 can be positioned in a region corresponding to the light-emitting device 200. For example, a portion of the multiple first air gaps 551 in the vertical direction (z-axis direction) can be positioned in a region overlapping with the light-emitting device 200. Furthermore, the remaining areas of the plurality of first air gaps 551 can be disposed in areas that do not overlap with the light-emitting device 200. The area where the plurality of first air gaps 551 are disposed can be defined as a first region R1. Here, the first region R1 can be a region where a plurality of first air gaps 551 are disposed to match a light-emitting device 200. As an example, the first region R1 can refer to a region located at... Figure 3 The outermost part of the region where the outer sides of the multiple first air gaps 551 are connected by a straight line.

[0053] The first region R1 can have a predetermined size. For example, when the light-emitting device 200 includes LED chips that emit light from five sides or is a top-view type with the light-emitting surface 201 facing upwards, the second width d2, defined as the width of the first region R1 in the first direction, can be approximately 2 to approximately 10 times the width of the light-emitting device 200 in the first direction. Specifically, the second width d2 can be approximately 3 to approximately 6 times the width of the light-emitting device 200 in the first direction. Furthermore, the third width d3, defined as the width of the first region R1 in the second direction, can be approximately 2 to approximately 10 times the width of the light-emitting device 200 in the second direction. Specifically, the third width d3 can be approximately 3 to approximately 6 times the width of the light-emitting device 200 in the second direction. The first regions R1 can be spaced apart by a second spacing P2 in the horizontal direction. Here, the second spacing P2 can be the shortest spacing between horizontally adjacent first regions R1. The second spacing P2 can be smaller than the first spacing P1 of the light-emitting device 200.

[0054] When the width of the first air gap 551, the spacing between the first air gaps 551, the position of the first region R1, and the size of the first region R1 do not meet the aforementioned ranges compared to the light-emitting device 200, it may be difficult to prevent the light emitted by the light-emitting device 200 from forming hot spots. Specifically, when the size of the first region R1 is smaller than the described range, hot spots may form because the area used to prevent hot spot formation is relatively small. Furthermore, when the size of the first region R1 exceeds the aforementioned range, the area occupied by the first adhesive member 531 and the first air gaps 551 is relatively large, and therefore the light transmittance may decrease due to these components. Therefore, it is desirable to meet the size of the first region R1 formed by the plurality of first air gaps 551 in order to effectively prevent hot spot formation and minimize the degradation of light transmittance caused by the first air gaps 551.

[0055] The lighting device 1000 may include a light-shielding member 570. The light-shielding member 570 may be disposed on the light control member 500. The light-shielding member 570 may be disposed between a first substrate 511 and a second substrate 512. The light-shielding member 570 may be disposed on the lower surface of the second substrate 512 facing the first substrate 511. The light-shielding member 570 may be disposed between the second substrate 512 and a first adhesive member 531. Additionally, the light-shielding member 570 may be disposed between the second substrate 512 and a plurality of first air gaps 551. The light-shielding member 570 may be overlaid and printed in multiple layers on the lower surface of the second substrate 512. Furthermore, the light-shielding member 570 may have a structure including multiple patterns of different sizes. When viewed from above, the planar shape of the light-shielding member 570 may have various shapes such as circular, elliptical, and polygonal. For example, considering the viewing angle of the light-emitting device 200, the planar shape of the light-shielding member 570 may include a curved shape. The light-shielding members 570 are provided in the same number as the light-emitting devices 200 and can be disposed in the region overlapping with the light-emitting devices 200 in the third direction (z-axis direction). Additionally, a portion of the light-shielding members 570 can be disposed in the region overlapping with portions of a plurality of first air gaps 551 in the third direction. The light-shielding members 570 can have a shape extending in the horizontal direction. The light-shielding members 570 can have a fourth width d4 defined as the width in the first direction, and the fourth width d4 can be greater than the first direction width d1 of the light-emitting device 200 and the horizontal width of the first air gaps 551, and can be less than the second width d2 of the first region R1. Furthermore, the light-shielding members 570 have a fifth width d5 ​​defined as the width in the second direction, and the fifth width d5 ​​can be greater than the second direction width of the light-emitting device 200 and less than the third width d3 of the first region R1.

[0056] The lighting device 1000 according to an embodiment of the present invention may include a plurality of first air gaps 551 matched with a light-emitting device 200, and the width of each of the plurality of first air gaps 551 may be smaller than the width of the light-emitting device 200. Therefore, according to the embodiment, it is possible to prevent the formation of hot spots due to light concentration from the light-emitting device 200. Specifically, light incident on the light control member 500 can be reflected and refracted by the first adhesive member 531, the first air gaps 551, and the first reflective surface 531S to change the emission direction, thereby preventing light concentration from the light-emitting device 200. The lighting device 1000 according to an embodiment of the present invention also includes a light-shielding member 570 to more effectively prevent the formation of hot spots due to light concentration. The lighting device 1000 can minimize the area and / or size of the light-shielding member 570 formed by the first air gaps 551, thereby minimizing light loss due to the light-shielding member 570. Therefore, the lighting device 1000 according to the embodiment can implement a uniform line light source or surface light source with improved brightness. In addition, since the lighting device 1000 forms a plurality of first air gaps 551 on an adhesive member, the light control member 500 can have a smaller thickness.

[0057] <Second Embodiment>

[0058] Figure 4 This is a side sectional view of a lighting device according to a second embodiment of the present invention. Figure 5 yes Figure 4 A top view of the lighting fixture. (In use) Figure 4 and Figure 5 In the description, the description of components that are the same as or similar to the components of the above-described lighting device is omitted and the same reference numerals are assigned, and these can be selectively applied to this embodiment.

[0059] Reference Figure 4 and Figure 5 According to a second embodiment of the present invention, the lighting device 1000 may include a light-emitting device 200 and a light control member 500 disposed on a resin layer 400. The light-emitting device 200 may include an LED chip emitting light from five sides, or may include a top-view type with the light-emitting surface 201 facing upwards. The light control member 500 is disposed on the upper surface of the resin layer 400 and may include a first substrate 511, a second substrate 512, a first adhesive member 531, a third substrate 513, and a second adhesive member 532. The first adhesive member 531 may be disposed between the first substrate 511 and the second substrate 512. The first adhesive member 531 may be an adhesive layer that bonds the first substrate 511 and the second substrate 512 together.

[0060] The first adhesive member 531 may be disposed in a designated area. For example, the first adhesive member 531 may be disposed in a portion of the area between the first substrate 511 and the second substrate 512, and the first air gap 551 may be formed in the remaining area where the first adhesive member 531 is not disposed. The first air gap 551 may be a region surrounded by the first adhesive member 531 in the area between the first substrate 511 and the second substrate 512.

[0061] The first air gap 551 may have a hole shape extending between the first substrate 511 and the second substrate 512. The first air gap 551 is formed as an air layer or a vacuum layer, and at least one may be disposed in the region between the first substrate 511 and the second substrate 512. The first air gap 551 may form a first reflective surface 531S. The first reflective surface 531S may be a side surface of the first adhesive member 531. Specifically, the first reflective surface 531S may be a side surface of the first adhesive member 531 exposed by the first air gap 551. The first reflective surface 531S may be perpendicular to the upper surface of the first substrate 511. Alternatively, the first reflective surface 531S may be obliquely disposed to have a predetermined oblique angle with the upper surface of the first substrate 511. The first reflective surface 531S may reflect light incident on the surface formed by the refractive index difference between the first air gap 551 and the first adhesive member 531. Therefore, the light control member 500 refracts and reflects light emitted from the light-emitting device 200 in a set direction, thereby preventing the phenomenon of light concentration hotspots.

[0062] The number of first air gaps 551 can be set to be equal to the number of multiple light-emitting devices 200. That is, multiple first air gaps 551 can be matched one-to-one with multiple light-emitting devices 200. Multiple first air gaps 551 can be spaced apart from each other in the region between the first substrate 511 and the second substrate 512. In this case, multiple first air gaps 551 can be spaced apart from each other at equal intervals. For example, the distance between multiple first air gaps 551 can be from about 0.1 mm to about 1 mm. First air gaps 551 can be set in a predetermined position. For example, first air gaps 551 can be set in a region corresponding to a light-emitting device 200. Specifically, first air gaps 551 can be set in a region that overlaps with the optical axis OA of the light-emitting device 200 that matches the center of the first air gap 551 in the vertical direction. Multiple first air gaps 551 can have a predetermined shape. For example, when viewed from above, first air gaps 551 can have various shapes such as polygons, circles, and ellipses. Multiple first air gaps 551 can have the same shape as each other. For example, the top shape of the plurality of first air gaps 551 can be as follows: Figure 5The diagram shows a circle. Multiple first air gaps 551 can have a defined width. For example, the width of the first air gap 551 in the horizontal direction (x-axis or y-axis direction) can be greater than the width d1 of the light-emitting device 200 in the horizontal direction. The multiple first air gaps 551 can have the same horizontal width as each other. Additionally, each of the multiple first air gaps 551 can have a constant width. For example, the width of the multiple first air gaps 551 can be constant and not change from the first substrate 511 towards the second substrate 512. That is, the cross-sectional shape of the first air gap 551 can be as shown... Figure 4 The shape shown is a rectangle with a constant width.

[0063] The first air gap 551 may have widths in a first direction and a second direction. For example, a second width d2, defined as the width of the first air gap 551 in the first direction, may be approximately 2 to approximately 10 times the width d1 of the light-emitting device 200 in the first direction. Specifically, the second width d2 may be approximately 3 to approximately 6 times the width d1 of the light-emitting device 200 in the first direction. Furthermore, a third width d3, defined as the width of the first air gap 551 in the second direction, may be approximately 2 to approximately 10 times the width of the light-emitting device 200 in the second direction. Specifically, the third width d3 may be approximately 3 to approximately 6 times the width of the light-emitting device 200 in the second direction. The first air gaps 551 may be spaced apart by a second spacing P2 in the horizontal direction. Here, the second spacing P2 may be the shortest interval between horizontally adjacent first air gaps 551. The second spacing P2 may be smaller than the first spacing P1 of the light-emitting device 200.

[0064] The third substrate 513 may be disposed on the second substrate 512. The third substrate 513 may be disposed on the upper surface of the second substrate 512. The third substrate 513 may include a light-transmitting material. For example, the third substrate 513 may include at least one of polyethylene terephthalate (PET), polystyrene (PS), polyimide (PI), polyethylene naphthalate (PEN), and polycarbonate (PC). The third substrate 513 may be provided with the same material as the first substrate 511 and the second substrate 512. The third substrate 513 may be a third light-transmitting film disposed on the second light-transmitting film. The first light-transmitting film, the second light-transmitting film, and the third light-transmitting film may be made of the same material. The first light-transmitting film, the second light-transmitting film, and the third light-transmitting film may have the same area as each other. The third substrate 513 may have a predetermined thickness. For example, the thickness of the third substrate 513 may be about 150 μm or less. Specifically, the thickness of the third substrate 513 may be about 100 μm or less. More specifically, the third substrate 513 may have a thickness of approximately 20 μm to approximately 100 μm. The third substrate 513 may be provided in the form of a light-transmitting film having a set thickness. Furthermore, the third substrate 513 may have the same thickness as the first substrate 511 and the second substrate 512. The first light-transmitting film, the second light-transmitting film, and the third light-transmitting film may have the same thickness as each other.

[0065] The second adhesive member 532 may be disposed between the second substrate 512 and the third substrate 513. The second adhesive member 532 may be an adhesive layer that bonds the second substrate 512 and the third substrate 513 together. The second adhesive member 532 may be formed of a light-transmitting material. For example, the second adhesive member 532 may include adhesive materials such as thermosetting PSA, thermosetting adhesive, UV-curable PSA, UV adhesive, silicone resin, or epoxy resin. The second adhesive member 532 may be disposed in a designated area. For example, the second adhesive member 532 may be disposed in a portion of the area between the second substrate 512 and the third substrate 513, and a second air gap 552 may be formed in the remaining area where the second adhesive member 532 is not disposed. The second air gap 552 may be a region surrounded by the second adhesive member 532 in the area between the second substrate 512 and the third substrate 513. The second air gap 552 may have a hole shape extending between the second substrate 512 and the third substrate 513. The second air gap 552 is formed as an air layer or a vacuum layer, and at least one of the second air gaps 552 can be disposed in the region between the second substrate 512 and the third substrate 513. The second air gap 552 can form a second reflective surface 532S, which can be a side surface of the second adhesive member 532. Specifically, the second reflective surface 532S can be a side surface of the second adhesive member 532 exposed by the second air gap 552. The second reflective surface 532S can be perpendicular to the upper surface of the second substrate 512. Alternatively, the second reflective surface 532S can be obliquely disposed at a predetermined angle to the upper surface of the second substrate 512. The second reflective surface 532S can reflect light incident on the surface formed by the refractive index difference between the second air gap 552 and the second adhesive member 532. The second reflective surface 532S can be parallel to the first reflective surface 531S. Specifically, the second reflective surface 532S can be disposed on the same plane as the first reflective surface 531S. Therefore, the light control component 500 refracts and reflects the light emitted from the light-emitting device 200 in a set direction, thereby preventing the phenomenon of concentrated light hotspots.

[0066] The second air gap 552 can be configured in a plurality equal to the number of the plurality of light-emitting devices 200 and the plurality of first air gaps 551. That is, the plurality of second air gaps 552 can be configured in a one-to-one match with the plurality of light-emitting devices 200 and the plurality of first air gaps 551. The plurality of second air gaps 552 can be spaced apart from each other in the region between the second substrate 512 and the third substrate 513. In this case, the plurality of second air gaps 552 can be spaced apart from each other at equal intervals. For example, the distance between the plurality of second air gaps 552 can be from about 0.1 mm to about 1 mm. The second air gap 552 can be positioned at a specific location. For example, the second air gap 552 can be positioned in a region corresponding to the light-emitting devices 200 and the first air gaps 551. Specifically, the second air gap 552 can be positioned in a region where the center of the first air gap 551 and the optical axis OA of the light-emitting device 200 matching the center of the second air gap 552 overlap in the vertical direction. The second air gap 552 can have a specific shape. For example, when viewed from above, the second air gap 552 can have various shapes, such as polygonal, circular, and elliptical. Multiple second air gaps 552 can have the same shape as each other. Additionally, the second air gap 552 can have the same shape as the first air gap 551. For example, the top shape of the multiple second air gaps 552 can be as follows: Figure 5 The circle shown.

[0067] The plurality of second air gaps 552 can have a set width. For example, the width of the second air gap 552 in the horizontal direction (x-axis or y-axis direction) can be greater than the width d1 of the light-emitting device 200 in the horizontal direction. The plurality of second air gaps 552 can have the same horizontal width as each other. In addition, each of the plurality of second air gaps 552 can have a constant width. For example, the width of the plurality of second air gaps 552 can have a constant width and does not change from the second substrate 512 toward the third substrate 513. That is, the cross-sectional shape of the second air gap 552 can be as follows: Figure 4The second air gap 552 is a rectangular shape with a constant width. It can have widths in both a first and a second direction. For example, the second air gap 552 can have the same width as the first air gap 551 in both directions. Specifically, the second width d2, defined as the width of the second air gap 552 in the first direction, can be the same as the second width d2 of the first air gap 551, and can be approximately 2 to approximately 10 times the width of the light-emitting device 200 in the first direction. More specifically, the second width d2 of the second air gap 552 can be approximately 3 to approximately 6 times the width of the light-emitting device 200 in the first direction. Furthermore, the third width d3, defined as the width of the second air gap 552 in the second direction, can be the same as the third width d3 of the first air gap 551, and can be approximately 2 to approximately 10 times the width of the light-emitting device 200 in the second direction. More specifically, the third width d3 of the second air gap 552 can be approximately 3 to approximately 6 times the width of the light-emitting device 200 in the second direction. The second air gap 552 can be spaced apart by a second spacing P2 in the horizontal direction. Here, the second spacing P2 can be the shortest interval between horizontally adjacent second air gaps 552. The second spacing P2 of the second air gap 552 can be the same as the second spacing P2 of the first air gap 551, and can be smaller than the first spacing P1 of the light-emitting device 200.

[0068] The lighting device 1000 may include a light-shielding member 570. The light-shielding member 570 may be disposed on the light control member 500. The light-shielding member 570 may be disposed on the outermost substrate among a plurality of substrates 511, 512, and 513. That is, the light-shielding member 570 may be disposed on a third substrate 513. The light-shielding member 570 may be disposed on the lower surface of the third substrate 513 facing the second substrate 512. The light-shielding member 570 may be disposed between the third substrate 513 and the second air gap 552. The light-shielding member 570 may be overlapped and printed in multiple layers. Additionally, the light-shielding member 570 may have a structure including multiple patterns of different sizes. When viewed from above, the planar shape of the light-shielding member 570 may have various shapes such as circular, elliptical, and polygonal. For example, considering the viewing angle of the light-emitting device 200, the planar shape of the light-shielding member 570 may include a curved shape.

[0069] The light-shielding members 570 are provided in the same number as the light-emitting devices 200 and can be disposed in the region overlapping with the light-emitting devices 200 in the third direction. Furthermore, the light-shielding members 570 can be provided in the same number as the first air gap 551 and the second air gap 552, and can be disposed in the region overlapping with the first air gap 551 and the second air gap 552 in the third direction. The center of the light-shielding member 570 can overlap with the center of the first air gap 551 and the center of the second air gap 552 in the third direction, and can overlap with the optical axis OA of the light-emitting device 200. The light-shielding member 570 can have a shape extending in the horizontal direction. The light-shielding member 570 can have a fourth width d4 defined as a first direction width, and the fourth width d4 can be greater than the first direction width d1 of the light-emitting device 200 and less than the second width d2 of the first air gap 551 and the second air gap 552. Furthermore, the light-shielding member 570 has a fifth width d5 ​​defined as the second direction width, and the fifth width d5 ​​can be greater than the second direction width of the light-emitting device 200, and can be less than the third width d3 of the first air gap 551 and the second air gap 552.

[0070] In the lighting device 1000 according to the second embodiment of the present invention, a plurality of matching air gaps, such as a first air gap 551 and a second air gap 552, can be formed in a multilayer structure on a light-emitting device 200. In this case, the first air gap 551 and the second air gap 552 are provided with a width greater than that of the light-emitting device 200, and can have the same shape and horizontal width. Furthermore, the first air gap 551 and the second air gap 552 are provided in an overlapping area, and their centers can overlap with the optical axis OA of the light-emitting device 200. Thus, it is possible to prevent the light emitted from the light-emitting device 200 from forming hot spots. In detail, the light control member 500 can control the emission direction by refracting and reflecting the incident light, and can prevent the light from the light-emitting device 200 from concentrating. The light control member 500 can minimize the area and size of the formed light-shielding member 570, thereby minimizing the light loss caused by the light-shielding member 570. Therefore, the lighting device 1000 according to the embodiment can realize a uniform line light source or surface light source with improved brightness. Furthermore, the lighting device 1000 can have a thin thickness, can be flexible, and can be provided in various shapes such as straight lines or curves.

[0071] Figure 6 This is another cross-sectional view of the lighting device according to the second embodiment. In use... Figure 6 In the description, the description of components that are the same as or similar to the components of the above-described lighting device is omitted and the same reference numerals are assigned, and these can be selectively applied to this embodiment.

[0072] Reference Figure 6The light control component 500 may include a first substrate 511, a second substrate 512, a first adhesive component 531, a first air gap 551, a third substrate 513, a second adhesive component 532, and a light-shielding component 570. Each of the first air gaps 551 and the second air gaps 552 may be configured in a plurality equal to the number of the plurality of light-emitting devices 200. That is, each of the plurality of first air gaps 551 and the plurality of second air gaps 552 may be arranged in a one-to-one match with the plurality of light-emitting devices 200. The first air gaps 551 and the second air gaps 552 may have the same shape. For example, the first air gaps 551 and the second air gaps 552 may have various of the aforementioned shapes, such as polygonal shapes, circular shapes, and elliptical shapes. The first air gaps 551 and the second air gaps 552 may have the same horizontal width. Specifically, the second width d2 of each of the first air gaps 551 and the second air gaps 552 may be approximately 2 to approximately 10 times the first directional width d1 of the light-emitting device 200. Furthermore, the third width d3 of each of the first air gap 551 and the second air gap 552 can be approximately 2 to approximately 10 times the width of the light-emitting device 200 in the second direction. Additionally, the widths of the first air gap 551 and the second air gap 552 can remain constant from bottom to top. That is, the cross-sectional shapes of the first air gap 551 and the second air gap 552 can have the following characteristics: Figure 6 The rectangular shape shown has a constant width. Multiple first air gaps 551 can be spaced apart from each other by a second distance P2 in the horizontal direction, and multiple second air gaps 552 can be spaced apart from each other by a second distance P2. The first air gaps 551 and second air gaps 552 can be positioned at predetermined locations. For example, the first air gaps 551 and second air gaps 552 can be positioned in a region corresponding to the light-emitting device 200. In this case, the first air gaps 551 and second air gaps 552 can be arranged in a sawtooth shape. The first air gaps 551 and second air gaps 552 can partially overlap each other. Specifically, the first air gap 551 can be positioned in a region where its center does not overlap with the optical axis of the light-emitting device 200 within the range overlapping with the light-emitting device 200 in the vertical direction. That is, the center of the first air gap 551 can be positioned in a region horizontally spaced from the optical axis OA of the light-emitting device 200. Additionally, the center of the second air gap 552 can be positioned in a region overlapping with the optical axis OA of the light-emitting device 200. Therefore, the first reflecting surface 531S and the second reflecting surface 532S do not have to be set on the same plane, but can be set in a stepped manner.

[0073] The light-shielding member 570 can be disposed on the outermost substrate among the plurality of substrates 511, 512, and 513. The light-shielding member 570 can be disposed on the lower surface of the third substrate 513. The light-shielding members 570 can be disposed in the same number as the light-emitting device 200, the first air gap 551, and the second air gap 552. Furthermore, the center of the light-shielding member 570 can be disposed in a region that overlaps with the optical axis OA of the light-emitting device 200 and the center of the second air gap 552 in a third-dimensional direction, and may not overlap with the center of the first air gap 551.

[0074] In another example of the lighting device 1000 according to a second embodiment of the present invention, a plurality of air gaps, such as a first air gap 551 and a second air gap 552, can be formed on a light-emitting device 200. In this case, the second air gap 552, which is disposed on the outermost side of the multi-layer air gaps, can be configured such that its center coincides with the optical axis of the light-emitting device 200, and the center of the first air gap 551 disposed below the second air gap 552 can be configured such that the optical axis OA and the center of the second air gap 552 do not overlap. Therefore, it is possible to more effectively prevent the light emitted from the light-emitting device 200 from forming hot spots. In detail, according to the embodiment, the first air gap 551 and the second air gap 552 are arranged in a sawtooth pattern, and the positions of the first reflecting surface 531S and the second reflecting surface 532S can be controlled by controlling the degree to which the center of the first air gap 551 is spaced apart from the optical axis OA. Therefore, the reflection angle of the light incident on the light control member 500 can be controlled, thereby allowing the emission direction to be controlled in more ways. Therefore, the lighting device 1000 according to the embodiment can have improved brightness and effectively control the formation of hot spots to implement a uniform line light source or a surface light source.

[0075] Figure 7 This is another cross-sectional view of the lighting device according to the second embodiment. In use... Figure 7 In the description, the description of components that are the same as or similar to the components of the above-described lighting device is omitted and the same reference numerals are assigned, and these can be selectively applied to this embodiment.

[0076] Reference Figure 7 Compared to Figure 4The lighting device 1000, according to an embodiment, may have multiple air gaps. Specifically, the light control member 500 may further include a fourth substrate 514 and a third adhesive member 533. The fourth substrate 514 may be disposed on the third substrate 513. The fourth substrate 514 may be disposed on the upper surface of the third substrate 513. The fourth substrate 514 may include a light-transmitting material. For example, the fourth substrate 514 may include at least one of polyethylene terephthalate (PET), polystyrene (PS), polyimide (PI), polyethylene naphthalate (PEN), and polycarbonate (PC). The fourth substrate 514 may be provided with the same material as the first substrate 511, the second substrate 512, and the third substrate 513. The fourth substrate 514 may be a fourth light-transmitting film disposed on the third light-transmitting film. The first to fourth light-transmitting films used as the first to fourth substrates 511, 512, 513, and 514 may be made of the same material. The upper or lower surfaces of the first to fourth light-transmitting films may have the same area as each other. The fourth substrate 514 may have a predetermined thickness. For example, the thickness of the fourth substrate 514 may be about 150 μm or less. More specifically, the thickness of the fourth substrate 514 may be about 100 μm or less. More specifically, the fourth substrate 514 may have a thickness of about 20 μm to about 100 μm. The fourth substrate 514 may be provided in the form of a light-transmitting film having a predetermined thickness. Furthermore, the fourth substrate 514 may be provided with the same thickness as the first substrate 511, the second substrate 512, and the third substrate 513. The first to fourth light-transmitting films may have the same thickness as each other.

[0077] The third adhesive member 533 may be disposed between the third substrate 513 and the fourth substrate 514. The third adhesive member 533 may be an adhesive layer that bonds the third substrate 513 and the fourth substrate 514 together. The third adhesive member 533 may be formed of a light-transmitting material. For example, the third adhesive member 533 may include adhesive materials such as thermosetting PSA, thermosetting adhesive, UV-curable PSA, UV adhesive, silicone resin, or epoxy resin. The third adhesive member 533 may be disposed in a defined area. For example, the third adhesive member 533 may be disposed in some areas between the third substrate 513 and the fourth substrate 514, and a third air gap 553 may be formed in the remaining areas where the third adhesive member 533 is not disposed. The third air gap 553 may be a region between the third substrate 513 and the fourth substrate 514 and surrounded by the third adhesive member 533. The third air gap 553 may have a hole shape extending between the third substrate 513 and the fourth substrate 514. The third air gap 553 is formed as an air layer or a vacuum layer, and at least one of the third air gaps 553 can be disposed in the region between the third substrate 513 and the fourth substrate 514. The third air gap 553 can form a third reflective surface 533S. The third reflective surface 533S can be a side surface of the third adhesive member 533. Specifically, the third reflective surface 533S can be a side surface of the third adhesive member 533 exposed by the third air gap 553. The third reflective surface 533S can be perpendicular to the upper surface of the third substrate 513. Alternatively, the third reflective surface 533S can be obliquely disposed to have a predetermined oblique angle with the upper surface of the third substrate 513. The third reflective surface 533S can reflect light incident on the surface formed by the refractive index difference between the third air gap 553 and the third adhesive member 533. Therefore, the light control member 500 refracts and reflects light emitted from the light-emitting device 200 in a set direction, thereby preventing the phenomenon of light concentration hotspots.

[0078] The third air gap 553 can be configured in a number equal to the number of the plurality of light-emitting devices 200, the plurality of first air gaps 551, and the plurality of second air gaps 552. That is, the plurality of third air gaps 553 can be configured in a one-to-one matching manner with the plurality of light-emitting devices 200, the plurality of first air gaps 551, and the plurality of second air gaps 552. The plurality of third air gaps 553 can be spaced apart from each other in the region between the third substrate 513 and the fourth substrate 514. In this case, the plurality of third air gaps 553 can be spaced apart from each other at equal intervals. For example, the interval between the plurality of third air gaps 553 can be from about 0.1 mm to about 1 mm. For example, the third air gap 553 can be disposed in the region corresponding to the light-emitting devices 200, the first air gaps 551, and the first air gaps 552. Specifically, the third air gap 553 can be disposed in a region that vertically overlaps with the optical axis OA of the light-emitting device 200, which matches the center of the third air gap 553 and the centers of the first air gaps 551 and the second air gaps 552. The third air gap 553 can have a defined shape. For example, when viewed from above, the third air gap 553 can have various shapes such as polygons, circles, and ellipses. Multiple third air gaps 553 can have the same shape as each other. Additionally, the third air gap 553 can have the same shape as the first air gap 551 and the second air gap 552. Multiple third air gaps 553 can have a defined width. For example, the width of the third air gap 553 in the horizontal direction (x-axis or y-axis direction) can be greater than the width d1 of the light-emitting device 200 in the horizontal direction. Multiple third air gaps 553 can have the same horizontal width as each other. Furthermore, each of the multiple third air gaps 553 can have a constant width. For example, the width of the multiple third air gaps 553 can have a constant width that does not change from the third substrate 513 toward the fourth substrate 514. That is, the cross-sectional shape of the third air gap 553 can be as follows: Figure 7The third air gap 553 has a rectangular shape with a constant width. It can have a width in both the first and second directions. For example, the third air gap 553 can have the same width in both the first and second directions as the first air gap 551 and the second air gap 552. Specifically, the second width d2, defined as the width of the third air gap 553 in the first direction, can be the same as the second width d2 of the first air gap 551 and the second air gap 552, and can be approximately 2 to approximately 10 times the width of the light-emitting device 200 in the first direction. Specifically, the second width d2 of the third air gap 553 can be approximately 3 to approximately 6 times the width of the light-emitting device 200 in the first direction. Furthermore, the third width d3, defined as the width of the third air gap 553 in the second direction, can be the same as the third width d3 of the first air gap 551 and the second air gap 552, and can be approximately 2 to approximately 10 times the width of the light-emitting device 200 in the second direction. Specifically, the third width d3 of the third air gap 553 can be approximately 3 to approximately 6 times the width of the light-emitting device 200 in the second direction. The third air gap 553 can be spaced apart from each other by a second distance P2 in the horizontal direction. Here, the second distance P2 can be the shortest distance between horizontally adjacent third air gaps 553. The second distance P2 of the third air gap 553 can be the same as the second distance P2 of the first air gap 551 and the second air gap 552, and can be smaller than the first distance P1 of the light-emitting device 200.

[0079] The lighting device 1000 may include a light-shielding member 570. The light-shielding member 570 may be disposed on the outermost substrate among a plurality of substrates 511, 512, 513, and 514. The light-shielding member 570 may be disposed on the lower surface of the fourth substrate 514. The light-shielding member 570 may be disposed between the fourth substrate 514 and the third air gap 553. The light-shielding member 570 may be disposed in the same number as the light-emitting device 200, the first air gap 551, the second air gap 552, and the third air gap 553. Furthermore, the center of the light-shielding member 570 may be disposed in a region overlapping, in a third-dimensional direction, the optical axis OA of the light-emitting device 200, the center of the first air gap 551, the center of the second air gap 552, and the center of the third air gap 553. In the lighting device 1000 according to the embodiment, a plurality of air gaps (three or more) matching them, such as the first air gap 551, the second air gap 552, and the third air gap 553, may be formed in a multilayer structure on a single light-emitting device 200. The first to third air gaps 551, 552, and 553 have a horizontal width larger than the horizontal width of the light-emitting device 200 and can have the same shape and horizontal width. Furthermore, the first to third air gaps 551, 552, and 553 are located in the overlapping area, and their centers can overlap with the optical axis OA of the light-emitting device 200. This prevents the light emitted from the light-emitting device 200 from forming hot spots. Specifically, the light control member 500 can control the emission direction by refracting and reflecting the incident light. Therefore, the light control member 500 can prevent the light from the light-emitting device 200 from concentrating. When the air gaps of the lighting device 1000 are formed in three or more layers as described above, the area and size of the light-shielding member 570 can be minimized, thereby minimizing light loss caused by the light-shielding member 570. Furthermore, although not shown in the figures, when the air gaps of the lighting device 1000 are formed in three or more layers as described above, the formation of hot spots can be effectively controlled by the multiple air gaps 551, 552, and 553. Therefore, the lighting device 1000 can omit the aforementioned light-shielding member 570 and thus improve the overall brightness of the output light.

[0080] Figure 8 This is another cross-sectional view of the lighting device according to the second embodiment. In use... Figure 8 In the description, the description of components that are the same as or similar to the components of the above-described lighting device is omitted and the same reference numerals are assigned, and these can be selectively applied to this embodiment.

[0081] Reference Figure 8The first air gap 551, the second air gap 552, and the third air gap 553 can be disposed at predetermined positions. The first air gap 551, the second air gap 552, and the third air gap 553 can be disposed in regions corresponding to the light-emitting device 200. For example, at least one center of the first air gap 551, the second air gap 552, and the third air gap 553 can be horizontally spaced from the optical axis OA of the light-emitting device 200. Specifically, the centers of the first air gap 551 and the third air gap 553 in the vertical direction can be disposed in regions overlapping with the optical axis OA of the light-emitting device 200. Furthermore, the second air gap 552 can be disposed in a region where its center does not overlap with the optical axis OA of the light-emitting device 200 within the vertical direction overlap with the light-emitting device 200. The center of the second air gap 552 can be disposed in a region horizontally spaced from the optical axis OA of the light-emitting device 200. That is, the first air gap 551 and the third air gap 553 can be disposed overlappingly, and the second air gap 552 can partially overlap with the other two air gaps 551 and 553. Therefore, the first reflecting surface 531S and the third reflecting surface 533S can be disposed on the same plane, and the second reflecting surface 532S can be disposed on a different plane from the first reflecting surface 531S and the third reflecting surface 533S.

[0082] In another example of the lighting device 1000 according to a second embodiment of the present invention, a plurality of matching air gaps, such as a first air gap 551, a second air gap 552, and a third air gap 553, can be formed in a multilayer structure. In this case, at least one air gap selected from the first air gap 551, the second air gap 552, and the third air gap 553 is placed in a region whose center does not overlap with the optical axis OA, allowing for more effective control of the emission direction of light incident on the light control member 500. Therefore, the lighting device 1000 according to the embodiment can effectively prevent hotspot formation and can achieve a uniform line light source or surface light source.

[0083] Figure 9 This is another cross-sectional view of the lighting device according to the second embodiment. In use... Figure 9 In the description, the description of components that are the same as or similar to the components of the above-described lighting device is omitted and the same reference numerals are assigned, and these can be selectively applied to this embodiment.

[0084] Reference Figure 9The first air gap 551, the second air gap 552, and the third air gap 553 can be positioned at predetermined locations. The first air gap 551, the second air gap 552, and the third air gap 553 can be positioned in regions corresponding to the light-emitting device 200. For example, at least one center of the first air gap 551, the second air gap 552, and the third air gap 553 can be horizontally spaced from the optical axis OA of the light-emitting device 200. The first air gap 551, the second air gap 552, and the third air gap 553 can be stepped. Specifically, based on the vertical direction, the first air gap 551 can be positioned in a region where its center does not overlap with the optical axis OA of the light-emitting device 200. Based on the vertical direction, the second air gap 552 can be positioned in a region where its center does not overlap with the optical axis OA of the light-emitting device 200 within the area overlapping with the light-emitting device 200. Based on the vertical direction, the third air gap 553 can be positioned in a region where its center overlaps with the optical axis OA of the light-emitting device 200. In this case, the horizontal distance between the center of the first air gap 551 and the optical axis OA can be greater than the horizontal distance between the center of the second air gap 552 and the optical axis OA. Therefore, the first reflecting surface 531S, the second reflecting surface 532S, and the third reflecting surface 533S do not need to be set on the same plane, but can be set in a stepped shape.

[0085] In another example of the lighting device 1000 according to a second embodiment of the present invention, a plurality of matching air gaps, such as a first air gap 551, a second air gap 552, and a third air gap 553, can be formed in a multi-layer structure. In this case, when the first air gap 551, the second air gap 552, and the third air gap 553 are arranged in a stepped manner, the emission direction of light incident on the light control member 500 can be controlled more effectively. Therefore, the lighting device 1000 according to the embodiment can effectively prevent the formation of hot spots and can achieve a uniform line light source or surface light source.

[0086] <Third Embodiment>

[0087] Figure 10 This is a cross-sectional view of a lighting device according to a third embodiment of the present invention. Figure 11 This is a top view of the lighting device according to the third embodiment. In use... Figure 10 and Figure 11 In the description, the description of components that are the same as or similar to the components of the above-described lighting device is omitted and the same reference numerals are assigned, and these can be selectively applied to this embodiment.

[0088] Reference Figure 10 and Figure 11 The lighting device 1000 may include a substrate 100, a light-emitting device 200, a reflective layer 300, a resin layer 400, and a light control component 500.

[0089] A light-emitting device 200 is disposed on a substrate 100 and can be electrically connected to the substrate 100. The light-emitting device 200 according to the third embodiment may have an emitting surface different from that of the light-emitting device 200 according to the first and second embodiments described above. For example, the light-emitting device 200 according to the third embodiment may be a side-view type with the emitting surface 201 facing the side. Specifically, the light-emitting device 200 may be configured such that the emitting surface 201 faces the side surface of the resin layer 400. That is, the emission direction of the light-emitting device 200 may be set to the transverse direction of the device, and the optical axis OA of the light-emitting device 200 may be parallel to the upper surface of the substrate 100. A reflective layer 300 may be disposed on the substrate 100. The reflective layer 300 may include a plurality of reflective patterns having a dot shape. The plurality of reflective patterns 310 may be arranged in a form that protrudes from the upper surface of the reflective layer 300. Specifically, the reflective patterns 310 may be arranged in the emission direction of the light-emitting device 200. The dot pattern density of the plurality of reflective patterns 310 may increase with increasing distance from the light-emitting device 200. For example, the density of the reflective pattern 310 per unit area can increase with increasing distance from the optical axis OA of the light-emitting device 200 in the horizontal direction. Furthermore, the size of the plurality of reflective patterns 310 can change with increasing distance from the light-emitting device 200. For example, the width of the plurality of reflective patterns 310 in the horizontal direction can increase with increasing distance from the optical axis OA of the light-emitting device 200 in the horizontal direction.

[0090] A light control component 500 may be disposed on a resin layer 400. The light control component 500 may include a first substrate 511, a second substrate 512, a first adhesive component 531, a third substrate 513, and a second adhesive component 532. The first adhesive component 531 may be disposed between the first substrate 511 and the second substrate 512. The first adhesive component 531 may be an adhesive layer that bonds the first substrate 511 and the second substrate 512 together. The first adhesive component 531 may be disposed in a designated area. For example, the first adhesive component 531 may be disposed in a portion of the area between the first substrate 511 and the second substrate 512, and a first air gap 551 may be formed in the remaining area where the first adhesive component 531 is not disposed. The first air gap 551 may be a region surrounded by the first adhesive component 531 in the area between the first substrate 511 and the second substrate 512. The first air gap 551 may have a hole shape extending between the first substrate 511 and the second substrate 512. The first air gap 551 is formed as an air layer or a vacuum layer, and at least one may be disposed in the area between the first substrate 511 and the second substrate 512.

[0091] The first air gap 551 can form a first reflective surface 531S. The first reflective surface 531S can be a side surface of the first adhesive member 531. Specifically, the first reflective surface 531S can be a side surface of the first adhesive member 531 exposed by the first air gap 551. The first reflective surface 531S can be perpendicular to the upper surface of the first substrate 511. Alternatively, the first reflective surface 531S can be inclined to have a predetermined tilt angle with the upper surface of the first substrate 511. The first reflective surface 531S can reflect light incident on the surface formed by the refractive index difference between the first air gap 551 and the first adhesive member 531. Therefore, the light control member 500 refracts and reflects light emitted from the light-emitting device 200 in a set direction, thereby preventing the phenomenon of light concentration hotspots. For this purpose, the first air gap 551 is provided in the region corresponding to the light-emitting device 200 in the vertical direction and can be provided in a plurality equal to the number of multiple light-emitting devices 200. That is, multiple first air gaps 551 can be arranged in a one-to-one configuration with multiple light-emitting devices 200. Multiple first air gaps 551 may be spaced apart from each other in the region between the first substrate 511 and the second substrate 512. In this case, the multiple first air gaps 551 may be spaced apart from each other at equal intervals. For example, the distance between the multiple first air gaps 551 may be from about 0.1 mm to about 1 mm. The multiple first air gaps 551 may have a defined shape. For example, the first air gap 551 may have a shape that extends along the emission direction of light emitted from the light-emitting device 200 when viewed from above. Considering the viewing angle of the light-emitting device 200, the upper shape of the first air gap 551 may have a shape including a curve. The multiple first air gaps 551 may have a defined width. For example, the width of the first air gap 551 in the horizontal direction (x-axis or y-axis direction) may be greater than the width of the light-emitting device 200 in the horizontal direction. In addition, each of the multiple first air gaps 551 may have a constant width. For example, the width of the first air gap 551 may be constant and does not change from the first substrate 511 toward the second substrate 512. That is, the cross-sectional shape of the first air gap 551 may be as follows: Figure 10 The shape shown is a rectangle with a constant width.

[0092] The first air gap 551 can have widths in both a first direction and a second direction. For example, a second width d2, defined as the width of the first air gap 551 in the first direction, can be approximately 4 to approximately 25 times the width of the light-emitting device 200 in the first direction. Specifically, the second width d2 can be approximately 4 to approximately 20 times the width of the light-emitting device 200 in the first direction. Furthermore, a third width d3, defined as the width of the first air gap 551 in the second direction, can be approximately 1.5 to approximately 5 times the width of the light-emitting device 200 in the second direction. Specifically, the third width d3 can be approximately 1.5 to approximately 4 times the width of the light-emitting device 200 in the second direction. That is, the second width d2 of the first air gap 551 corresponding to the light-emitting direction of the light-emitting device 200 can be greater than the third width d3. The first air gaps 551 can be spaced apart by a second spacing P2 in the horizontal direction. Here, the second spacing P2 can be the shortest interval between horizontally adjacent first air gaps 551. The second spacing P2 can be smaller than the first spacing P1 of the light-emitting devices 200. Here, the first spacing P1 can refer to the spacing between the light-emitting surfaces 201 of the light-emitting device 200.

[0093] The second adhesive member 532 may be disposed between the second substrate 512 and the third substrate 513. The second adhesive member 532 may be an adhesive layer that bonds the second substrate 512 and the third substrate 513 together. The second adhesive member 532 may be disposed in a designated area. For example, the second adhesive member 532 may be disposed in a portion of the area between the second substrate 512 and the third substrate 513, and a second air gap 552 may be formed in the remaining area where the second adhesive member 532 is not disposed. The second air gap 552 may be a region between the second substrate 512 and the third substrate 513 surrounded by the second adhesive member 532. The second air gap 552 may have a hole shape extending between the second substrate 512 and the third substrate 513. The second air gap 552 may be formed as an air layer or a vacuum layer, and at least one of the second air gaps 552 may be disposed in the area between the second substrate 512 and the third substrate 513. The second air gap 552 may form a second reflective surface 532S. The second reflective surface 532S may be a side surface of the second adhesive member 532. Specifically, the second reflective surface 532S can be a side surface of the second adhesive member 532 exposed by the second air gap 552. The second reflective surface 532S can be perpendicular to the upper surface of the second substrate 512. Alternatively, the second reflective surface 532S can be inclined to have a predetermined tilt angle with the upper surface of the second substrate 512. The second reflective surface 532S can reflect light incident on the surface formed by the refractive index difference between the second air gap 552 and the second adhesive member 532. The second reflective surface 532S can be parallel to the first reflective surface 531S. Specifically, the second reflective surface 532S can be disposed on the same plane as the first reflective surface 531S. Therefore, the light control member 500 refracts and reflects light emitted from the light-emitting device 200 in a predetermined direction, thereby preventing the phenomenon of light concentration hotspots. For this purpose, the second air gap 552 can be disposed in a region corresponding to the light-emitting device 200 and the first air gap 551 in the vertical direction. That is, the center of the second air gap 552 can overlap with the center of the first air gap 551 in the vertical direction. Furthermore, the number of second air gaps 552 can be equal to the number of the plurality of light-emitting devices 200 and the plurality of first air gaps 551. That is, the plurality of second air gaps 552 can be arranged in a one-to-one matching manner with the plurality of light-emitting devices 200 and the plurality of first air gaps. The plurality of second air gaps 552 can be spaced apart from each other in the region between the second substrate 512 and the third substrate 513. In this case, the plurality of second air gaps 552 can be spaced apart from each other at equal intervals. For example, the distance between the plurality of second air gaps 552 can be from about 0.1 mm to about 1 mm.

[0094] The plurality of second air gaps 552 can have a defined shape. For example, the second air gap 552 can have a shape that extends along the emission direction of light emitted from the light-emitting device 200 when viewed from above. Considering the viewing angle of the light-emitting device 200, the upper shape of the second air gap 552 can have a shape including a curve. The second air gap 552 can have the same top shape as the first air gap 551. The plurality of second air gaps 552 can have a defined width. For example, the width of the second air gap 552 in the horizontal direction (x-axis or y-axis direction) can be greater than the width of the light-emitting device 200 in the horizontal direction. In addition, each of the plurality of second air gaps 552 can have a constant width. For example, the width of the second air gap 552 can have a constant width without changing from the second substrate 512 toward the third substrate 513. That is, the cross-sectional shape of the second air gap 552 can be as follows: Figure 10 The second air gap 552 has a rectangular shape with a constant width. It can have widths in both a first and second direction. For example, the second width d2, defined as the width of the second air gap 552 in the first direction, can be the same as the second width d2 of the first air gap 551, and can be approximately 4 to 25 times the width of the light-emitting device 200 in the first direction. More specifically, the second width d2 of the second air gap 552 can be approximately 4 to approximately 20 times the width of the light-emitting device 200 in the first direction. Furthermore, the third width d3, defined as the width of the first air gap 551 in the second direction, can be the same as the third width d3 of the first air gap 551, and can be approximately 1.5 to 5 times the width of the light-emitting device 200 in the second direction. More specifically, the third width d3 of the second air gap 552 can be approximately 1.5 to approximately 4 times the width of the light-emitting device 200 in the second direction. In other words, in the second air gap 552, the second width d2 corresponding to the light-emitting direction of the light-emitting device 200 can be greater than the third width d3, and the same as the width of the first air gap 551.

[0095] The second air gap 552 can be spaced apart by a second spacing P2 in the horizontal direction. Here, the second spacing P2 can be the shortest interval between horizontally adjacent second air gaps 552. The second spacing P2 of the second air gaps 552 can be smaller than the first spacing P1 of the light-emitting device 200, and can be the same as the second spacing P2 of the first air gap 551.

[0096] The lighting device 1000 may include a light-shielding member 570. The light-shielding member 570 may be disposed on the light control member 500. The light-shielding member 570 may be disposed on the outermost substrate among a plurality of substrates 511, 512, and 513. The light-shielding member 570 may be disposed on the lower surface of the third substrate 513 facing the second substrate 512. The light-shielding member 570 may be disposed between the third substrate 513 and the second air gap 552. When viewed from above, the planar shape of the light-shielding member 570 may have various shapes such as circular, elliptical, and polygonal. For example, considering the emission direction and beam angle of the light-emitting device 200, the planar shape of the light-shielding member 570 may include a curved shape. The light-shielding members 570 are provided in the same number as the light-emitting devices 200 and may be disposed in the region overlapping with the light-emitting devices 200 in a third-order upward direction. Furthermore, the light-shielding member 570 may be configured to extend along the emission direction of the light emitted from the light-emitting device 200. The light-shielding member 570 may have a fourth width d4 defined as the width in the first direction and a fifth width d5 ​​defined as the width in the second direction. In this case, the fourth width d4 corresponding to the direction of the optical axis OA of the light-emitting device 200 may be greater than the fifth width d5.

[0097] In another example of the lighting device 1000 according to a third embodiment of the present invention, a plurality of matching air gaps 550, such as a first air gap 551 and a second air gap 552, can be formed in a multilayer structure on a light-emitting device 200. In this case, the first air gap 551 and the second air gap 552 extend along the emission direction of the light-emitting device 200 and can have different widths in the first and second directions. This prevents the light emitted from the light-emitting device 200 from forming hot spots. Specifically, the light control member 500 can control the emission direction by refracting and reflecting light emitted from the light-emitting device 200 in a lateral direction and incident on the light control member 500. Therefore, the light control member 500 can prevent light from concentrating in the area corresponding to the emission direction of the light-emitting device 200 and can provide a uniform line light source or surface light source. Since the light control member 500 includes a plurality of air gaps, the area and size of the formed light-shielding member 570 can be minimized, thereby minimizing light loss caused by the light-shielding member 570. Therefore, the lighting device 1000 can achieve a uniform line light source or surface light source with improved brightness.

[0098] <Fourth Embodiment>

[0099] Figure 12 This is a cross-sectional view of the lighting device according to the fourth embodiment. Figure 13 This is a top view of the lighting device according to the fourth embodiment. In use... Figure 12 and Figure 13In the description, the description of components that are the same as or similar to the components of the above-described lighting device is omitted and the same reference numerals are assigned, and these can be selectively applied to this embodiment.

[0100] Reference Figure 12 and Figure 13 The lighting device 1000 may include a substrate 100, a light-emitting device 200, a reflective layer 300, a resin layer 400, and a light control component 500. The light-emitting device 200 may be a side-view type similar to the third embodiment described above. That is, the light-emitting surface 201 of the light-emitting device 200 may face the side. Specifically, the light-emitting device 200 may be configured such that the light-emitting surface 201 faces the side surface of the resin layer 400, and the optical axis OA of the light-emitting device 200 may be parallel to the upper surface of the substrate 100. The reflective layer 300 may be disposed on the substrate 100. The reflective layer 300 may include a plurality of reflective patterns having a dot shape. The plurality of reflective patterns 310 may be arranged in a form that protrudes from the upper surface of the reflective layer 300. The reflective patterns 310 may be arranged in the emission direction of the light-emitting device 200. The dot pattern density of the plurality of reflective patterns 310 may increase with increasing distance from the light-emitting device 200. For example, the density of reflective patterns 310 per unit area may increase with increasing distance from the optical axis OA of the light-emitting device 200 in the horizontal direction. The size of the plurality of reflective patterns 310 can change as the distance from the light-emitting device 200 increases. For example, the width of the plurality of reflective patterns 310 in the horizontal direction can increase as the distance from the optical axis OA of the light-emitting device 200 in the horizontal direction increases.

[0101] A light control component 500 may be disposed on a resin layer 400. The light control component 500 may include a first substrate 511, a second substrate 512, and a first adhesive component 531. The first adhesive component 531 may be disposed between the first substrate 511 and the second substrate 512. The first adhesive component 531 may be an adhesive layer that bonds the first substrate 511 and the second substrate 512 together. The first adhesive component 531 may be disposed in a designated area. For example, the first adhesive component 531 may be disposed in a portion of the area between the first substrate 511 and the second substrate 512, and a first air gap 551 may be formed in the remaining area where the first adhesive component 531 is not disposed. The first air gap 551 may be a region surrounded by the first adhesive component 531 in the area between the first substrate 511 and the second substrate 512. The first air gap 551 may have a hole shape extending between the first substrate 511 and the second substrate 512. The first air gap 551 may be formed as an air layer or a vacuum layer, and at least one may be disposed in the area between the first substrate 511 and the second substrate 512.

[0102] The first air gap 551 can form a first reflective surface 531S. The first reflective surface 531S can be a side surface of the first adhesive member 531. Specifically, the first reflective surface 531S can be a side surface of the first adhesive member 531 exposed by the first air gap 551. The first reflective surface 531S can be perpendicular to the upper surface of the first substrate 511. Alternatively, the first reflective surface 531S can be tilted to have a predetermined tilt angle with the upper surface of the first substrate 511. The first reflective surface 531S can reflect light incident on the surface formed by the refractive index difference between the first air gap 551 and the first adhesive member 531. Therefore, the light control member 500 refracts and reflects light emitted from the light-emitting device 200 in a set direction, thereby preventing the phenomenon of light concentration hotspots. The number of first air gaps 551 can be greater than the number of light-emitting devices 200. That is, one light-emitting device 200 can correspond to multiple first air gaps 551. The multiple first air gaps 551 can be spaced apart from each other in the region between the first substrate 511 and the second substrate 512. In this configuration, the plurality of first air gaps 551 can be spaced apart at regular intervals, and the distance between the plurality of first air gaps 551 can be from about 0.1 mm to about 1 mm. The plurality of first air gaps 551 can have a defined shape. For example, when viewed from above, the first air gaps 551 can have various shapes such as polygons, circles, and ellipses. The plurality of first air gaps 551 can have the same shape as each other. For example, the top shape of the plurality of first air gaps 551 can be as follows: Figure 13 The circle shown.

[0103] Multiple first air gaps 551 can have a defined width. For example, the width of the first air gap 551 in the horizontal direction (x-axis or y-axis direction) can be smaller than the width d1 of the light-emitting device 200 in the horizontal direction. For example, the horizontal width of the first air gap 551 can be from about 0.1 mm to about 1 mm. Multiple first air gaps 551 can have the same horizontal width as each other. In addition, each of the multiple first air gaps 551 can have a constant width. For example, the width of the multiple first air gaps 551 can have a constant width and will not change from the first substrate 511 toward the second substrate 512. That is, the cross-sectional shape of the first air gap 551 can be a rectangular shape with a constant width. Multiple first air gaps 551 can be disposed in a defined position. Specifically, the multiple first air gaps 551 can be disposed in a region corresponding to the light-emitting device 200. For example, a portion of the multiple first air gaps 551 in the vertical direction (z-axis direction) can be disposed in a region overlapping with the light-emitting device 200. Furthermore, the remaining portions of the plurality of first air gaps 551 can be disposed in regions that do not overlap with the light-emitting device 200, for example, in regions corresponding to the emission direction of the light-emitting device 200.

[0104] The region having multiple first air gaps 551 can be defined as a first region R1. Here, the first region R1 can be a region having multiple first air gaps 551 that match a light-emitting device 200. For example, Figure 13 The first region R1 can refer to the region located on the outermost edge of a plurality of first air gaps 551 connected in a straight line. The first region R1 can have a shape corresponding to the emission direction of light emitted from the light-emitting device 200 and can have a set size. For example, the second width d2, defined as the width of the first region R1 in the first direction, can be approximately 4 to approximately 25 times the width of the light-emitting device 200 in the first direction. Specifically, the second width d2 can be approximately 4 to approximately 20 times the width of the light-emitting device 200 in the first direction. Furthermore, the third width d3, defined as the width of the first region R1 in the second direction, can be approximately 1.5 to approximately 5 times the width of the light-emitting device 200 in the second direction. Specifically, the third width d3 can be approximately 1.5 to approximately 4 times the width of the light-emitting device 200 in the second direction. That is, the second width d2 of the first region R1 corresponding to the emission direction of the light-emitting device 200 can be greater than the third width d3. The first regions R1 can be spaced apart by a second spacing P2 in the horizontal direction. Here, the second spacing P2 can be the shortest interval between horizontally adjacent first regions R1. The second spacing P2 can be smaller than the first spacing P1 of the light-emitting device 200.

[0105] The lighting device 1000 may include a light-shielding member 570. The light-shielding member 570 may be disposed between a first substrate 511 and a second substrate 512. The light-shielding member 570 may be disposed on the lower surface of the second substrate 512. The light-shielding member 570 may be disposed between the second substrate 512 and a first adhesive member 531. Additionally, the light-shielding member 570 may be disposed between the second substrate 512 and a plurality of first air gaps 551. When viewed from above, the planar shape of the light-shielding member 570 may have various shapes such as circular, elliptical, and polygonal. For example, considering the emission direction and beam angle of the light-emitting device 200, the planar shape of the light-shielding member 570 may include a curved shape. The light-shielding members 570 are provided in the same number as the light-emitting devices 200 and may be disposed in areas overlapping with the light-emitting devices 200 in the third direction (z-axis direction). Furthermore, a portion of the light-shielding member 570 may be disposed in areas overlapping with a portion of the plurality of first air gaps 551 in the third direction. The light-shielding member 570 may have a fourth width d4 defined as the width in a first direction and a fifth width d5 ​​defined as the width in a second direction. In this case, the fourth width d4 corresponding to the direction of the optical axis OA of the light-emitting device 200 may be greater than the fifth width d5. In addition, the fourth width d4 and the fifth width d5 ​​of the light-shielding member 570 may be greater than the horizontal width of the first air gap 551.

[0106] The lighting device 1000 according to a fourth embodiment of the present invention may include a plurality of first air gaps 551 corresponding to a light-emitting device 200, and each of the plurality of first air gaps 551 may have a width smaller than the width of the light-emitting device 200. Furthermore, the plurality of first air gaps 551 may extend along the emission direction of the light-emitting device 200 and may have different widths in a first direction and a second direction. This prevents light emitted from the light-emitting device 200 from forming hot spots. Specifically, the light control member 500 can control the emission direction by refracting and reflecting light emitted from the light-emitting device 200 in a lateral direction and incident on the light control member 500. Therefore, the light control member 500 can prevent light from concentrating in the area corresponding to the emission direction of the light-emitting device 200 and can provide a uniform line light source or area light source. Additionally, since the lighting device 1000 forms a plurality of first air gaps 551 on an adhesive member, the light control member 500 can have a smaller thickness.

[0107] Figure 14 This is another cross-sectional view of the lighting device according to the fourth embodiment. In use Figure 14 In the description, the description of components that are the same as or similar to the components of the above-described lighting device is omitted and the same reference numerals are assigned, and these can be selectively applied to this embodiment.

[0108] Reference Figure 14The number of first air gaps 551 can be greater than the number of light-emitting devices 200. That is, one light-emitting device 200 can correspond to multiple first air gaps 551. The multiple first air gaps 551 can have a defined shape. For example, when viewed from above, the first air gap 551 can have various shapes such as polygons, circles, and ellipses. The multiple first air gaps 551 can have the same shape as each other. The multiple first air gaps 551 can have a defined width. The horizontal width (x-axis or y-axis direction) d11 of the first air gap 551 can be smaller than the horizontal width d1 of the light-emitting device 200. For example, the horizontal width d11 of the first air gap 551 can be from about 0.1 mm to about 1 mm. Furthermore, the horizontal width d11 of each of the multiple first air gaps 551 can be constant. Specifically, the horizontal width d11 of each of the multiple first air gaps 551 can have a constant width and will not change in the direction from the first substrate 511 to the second substrate 512. In other words, the cross-sectional shape of each of the plurality of first air gaps 551 can be a rectangular shape with a constant width. The width d11 of the plurality of first air gaps 551 in the horizontal direction can vary within the aforementioned range. For example, the width of the plurality of first air gaps 551 in the horizontal direction can decrease as the distance from the light-emitting device 200 increases. That is, the first air gap 551 located at the farthest distance from the light-emitting device 200 can have the smallest horizontal width among the plurality of first air gaps 551. The density of the plurality of first air gaps 551 can vary according to the distance from the light-emitting device 200. For example, the density of first air gaps 551 per unit area can increase as the distance from the light-emitting device 200 increases.

[0109] Therefore, the fourth embodiment of the present invention can prevent the formation of hot spots due to light concentration caused by light emitted from the light-emitting device 200. Specifically, the lighting device 1000 according to the embodiment can control the formation of hot spots by controlling the position, width, and density of the first air gap 551, and can minimize light loss caused by the light control member 500. Therefore, the lighting device 1000 according to the embodiment can realize a uniform line light source or surface light source with improved brightness.

[0110] Figure 15 This is another cross-sectional view of the lighting device according to the fourth embodiment. In use Figure 15 In the description, the description of components that are the same as or similar to the components of the above-described lighting device is omitted and the same reference numerals are assigned, and these can be selectively applied to this embodiment.

[0111] Reference Figure 15The number of first air gaps 551 can be greater than the number of light-emitting devices 200. That is, one light-emitting device 200 can correspond to multiple first air gaps 551. The multiple first air gaps 551 can have a defined shape. For example, when viewed from above, the first air gap 551 can have various shapes such as polygons, circles, and ellipses. The multiple first air gaps 551 can have the same shape as each other. The multiple first air gaps 551 can have a defined width. The width of the first air gap 551 in the horizontal direction (x-axis or y-axis direction) can be less than the width d1 of the light-emitting device 200 in the horizontal direction. The horizontal width of each of the multiple first air gaps 551 can vary. Specifically, the horizontal width of each of the multiple first air gaps 551 can vary from the first substrate 511 to the second substrate 512. For example, the horizontal width of each of the multiple first air gaps 551 can increase from the first substrate 511 to the second substrate 512. That is, the cross-sectional shape of each of the plurality of first air gaps 551 can be a trapezoidal shape with an increased width, and the first reflective surface 531S can be configured to be inclined at a predetermined angle relative to the upper surface of the first substrate 511. The horizontal width of the first air gap 551 can be from about 0.1 mm to about 1 mm. The horizontal width of the plurality of first air gaps 551 can vary within the above range. For example, the horizontal width of the plurality of first air gaps 551 can decrease as the distance from the light-emitting device 200 increases. That is, the first air gap 551 located at the farthest distance from the light-emitting device 200 can have the smallest horizontal width among the plurality of first air gaps 551.

[0112] The density of the plurality of first air gaps 551 can vary depending on the distance from the light-emitting device 200. For example, the density of the first air gaps 551 per unit area can increase with increasing distance from the light-emitting device 200. Therefore, the fourth embodiment can prevent the formation of hot spots due to light concentration caused by light emitted from the light-emitting device 200. In detail, the lighting device 1000 according to the embodiment can control the formation of hot spots by controlling the position, width, density, and tilt angle of the first reflective surface 531S, and can minimize light loss caused by the light control member 500. Therefore, the lighting device 1000 according to the embodiment can realize a uniform line light source or surface light source with improved brightness.

[0113] Figures 16 to 18 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 16 This is a top view of a vehicle equipped with lights. Figure 17 This is an example of a lighting device according to an embodiment being placed on the front side of a vehicle. Figure 18 This is an example of a lighting device placed at the rear of a vehicle according to an embodiment.

[0114] Reference Figures 16 to 18 The lighting device 1000 according to the embodiment can be applied to a vehicle 2000. One or more lights can be disposed in at least one of the front, rear, and side portions of the vehicle 2000. For example, refer to... Figure 17 The lamp 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 a lighting device 1000. The first cover member 2110 houses the first lamp module 2120 and may be made of a light-transmitting material. The first cover member 2110 may be curved depending on the design of the vehicle 2000 and may be set to a flat or curved shape depending on the shape of the first lamp module 2120. The headlight 2100 can provide multiple functions by controlling the actuation timing of the lighting device 1000 included in the first lamp module 2120. For example, the headlight 2100 may provide at least one of the functions of a headlight, turn signal, daytime running light, high-mounted lamp, low-mounted lamp, and fog light through the light emission of the lighting device 1000. Furthermore, the headlight 2100 may provide additional functions such as welcome lights or celebratory effects when the driver opens a vehicle door.

[0115] Reference Figure 18 The lamp 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 an illumination device 1000. 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 have a curved shape 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 multiple functions by controlling the actuation timing of the illumination device 1000 included in the second lamp module 2220. For example, the rear light 2200 may provide at least one of the functions of a side light, brake light, and turn signal indicator by light emitted from the illumination device 1000.

Claims

1. A lighting device, comprising: substrate; A light-emitting device, wherein the light-emitting device is disposed on the substrate; A reflective layer disposed on the substrate; A resin layer disposed on the reflective layer; as well as A light control component, wherein the light control component is disposed on the resin layer. The light control component includes: A first substrate, wherein the first substrate is disposed on the resin layer; A second substrate, wherein the second substrate is disposed on the first substrate; and A first adhesive component is disposed between the first substrate and the second substrate. The region between the first substrate and the second substrate includes a plurality of first air gaps formed in the region where the first adhesive member is not disposed. The number of the plurality of first air gaps is greater than the number of the light-emitting devices. The plurality of first air gaps have a hole shape extending from the first substrate toward the second substrate. The region containing the plurality of first air gaps is designated as the first region. The first region is a region in which the plurality of first air gaps corresponding to one light-emitting device are provided. A portion of the plurality of first air gaps is disposed in a region that overlaps with the light-emitting device in the vertical direction. The reflective layer includes an opening, the lower part of the light-emitting device is disposed in the opening, and the opening exposes a portion of the upper surface of the substrate. A portion of the resin layer is disposed in the opening of the reflective layer and is configured to contact the portion of the upper surface of the substrate that is not provided with the light-emitting device through the opening.

2. The lighting device according to claim 1, wherein, The width of each of the plurality of first air gaps in the horizontal direction is smaller than the width of the light-emitting device in the horizontal direction. The lighting device includes a light-shielding member disposed between the second substrate and the first air gap. The width of the light-shielding member in the horizontal direction is greater than the width of each of the plurality of first air gaps in the horizontal direction.

3. The lighting device according to claim 2, wherein, The remaining portions of the plurality of first air gaps are disposed in a region that does not overlap with the light-emitting device in the vertical direction, and The width of each of the first air gaps in the horizontal direction is in the range of 0.1 mm to 1 mm.

4. A lighting device, comprising: substrate; A light-emitting device, wherein the light-emitting device is disposed on the substrate; A reflective layer disposed on the substrate; A resin layer disposed on the reflective layer; as well as A light control component, wherein the light control component is disposed on the resin layer. The light control component includes: A first substrate, wherein the first substrate is disposed on the resin layer; A second substrate, wherein the second substrate is disposed on the first substrate; and A first adhesive component is disposed between the first substrate and the second substrate. The region between the first substrate and the second substrate includes a plurality of first air gaps formed in the region where the first adhesive member is not disposed. Wherein, the number of the plurality of first air gaps is greater than or equal to the number of the light-emitting devices. The light control component further includes: A third substrate, wherein the third substrate is disposed on the second substrate; and A second adhesive component is disposed between the second substrate and the third substrate. The region between the second substrate and the third substrate includes a second air gap formed in the region where the second adhesive member is not disposed. Wherein, the number of each of the first air gap and the second air gap is equal to the number of the light-emitting devices, and The reflective layer includes a plurality of reflective patterns arranged in a manner that protrudes from the upper surface of the reflective layer. The reflective patterns have a dot shape, and the density of the dot pattern of the plurality of reflective patterns increases with the distance from the optical axis of the light-emitting device in the horizontal direction.

5. The lighting device according to claim 4, wherein, The first air gap and the second air gap have the same shape and the same width in the horizontal direction.

6. The lighting device according to claim 4, comprising a light-shielding member disposed between the third substrate and the second air gap. in, The width of the light-shielding member in the horizontal direction is smaller than the width of the first air gap and the second air gap in the horizontal direction.

7. The lighting device according to any one of claims 4 to 6, wherein, The centers of the first air gap and the second air gap overlap with the optical axis of the light-emitting device in the vertical direction.

8. The lighting device according to any one of claims 4 to 6, wherein, The center of the first air gap is horizontally spaced from the optical axis of the light-emitting device, and The center of the second air gap overlaps with the optical axis of the light-emitting device in the vertical direction.

9. The lighting device according to any one of claims 4 to 6, comprising a light-shielding member disposed between the second substrate and the first air gap, wherein the width of the light-shielding member in the horizontal direction is greater than the width of the first air gap in the horizontal direction.

10. A lighting device, comprising: substrate; A light-emitting device, wherein the light-emitting device is disposed on the substrate; A reflective layer disposed on the substrate; A resin layer disposed on the reflective layer; as well as A light control component, wherein the light control component is disposed on the resin layer. The light control component includes: A first substrate, wherein the first substrate is disposed on the resin layer; A second substrate, wherein the second substrate is disposed on the first substrate; and A first adhesive component is disposed between the first substrate and the second substrate. The region between the first substrate and the second substrate includes a plurality of first air gaps formed in the region where the first adhesive member is not disposed. The light-emitting surface of the light-emitting device faces the side surface of the resin layer. The number of the plurality of first air gaps is greater than the number of the light-emitting devices. The plurality of first air gaps have a hole shape extending from the first substrate toward the second substrate. The plurality of first air gaps are disposed in a region corresponding to a light-emitting device, and the plurality of first air gaps overlap with a light-emitting device in the vertical direction. The reflective layer includes an opening, the lower part of the light-emitting device is disposed in the opening, and the opening exposes a portion of the upper surface of the substrate. A portion of the resin layer is disposed in the opening of the reflective layer and is configured to contact the portion of the upper surface of the substrate that is not provided with the light-emitting device through the opening.

11. The lighting device according to claim 10, in, The width of each of the plurality of first air gaps in the horizontal direction is smaller than the width of the light-emitting device in the horizontal direction.

12. The lighting device according to claim 11, wherein, The remaining portions of the plurality of first air gaps are disposed in a region that overlaps with the light-emitting device in the vertical direction, and The width of each of the first air gaps in the horizontal direction is in the range of 0.1 mm to 1 mm.

13. The lighting device according to claim 11 or 12, wherein, The width of the plurality of first air gaps in the horizontal direction decreases as the distance from the light-emitting device increases.

14. The lighting device according to claim 11 or 12, wherein, The width of each of the plurality of first air gaps varies in the horizontal direction from the first substrate toward the second substrate.

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