Optical device and vehicle lamp

Abstract

A lighting device disclosed in an embodiment of the present invention comprises: a substrate; a resin layer disposed on the substrate; a plurality of light emitting devices sealed in the resin layer and electrically connected to the substrate; an optical film disposed on the resin layer; an adhesive layer provided between the optical film and the resin layer; and a plurality of light-shielding members including a light-shielding pattern disposed on a lower surface of the optical film and at least partially overlapping the plurality of light-emitting devices in a vertical direction, in which each of the plurality of light-emitting devices includes a light-emitting surface emitting light to one side, an upper surface area of each of the plurality of light shielding members is in a range of 6 to 10 times an upper surface area of each of the plurality of light emitting devices, and light uniformity on the optical film may be 80% or more.

Description

Technical Field

[0001] Embodiments of the present invention relate to a lighting device and a vehicle lamp. Background Art

[0002] Lighting applications include vehicle lamps and backlights for displays and signs. Compared with conventional light sources such as fluorescent lamps and incandescent lamps, light-emitting devices such as light-emitting diodes (LEDs) have advantages such as low power consumption, semi-permanent service life, fast response speed, safety, and environmental friendliness. These light-emitting diodes are applied to various display devices and various lighting devices such as indoor or outdoor lamps.

[0003] Recently, a lamp using a light-emitting diode has been proposed as a vehicle light source. Compared with an incandescent lamp, the light-emitting diode has the advantage of low power consumption. However, since the emission angle of the light emitted from the light-emitting diode is small, when the light-emitting diode is used as a vehicle lamp, it is necessary to increase the light-emitting area of the lamp using the light-emitting diode. Since the light-emitting diode is small, the degree of freedom in the design of the lamp can be increased, and it is economical due to its semi-permanent service life. Summary of the Invention

[0004] Technical Problem

[0005] Embodiments of the present invention may provide a lighting device for providing a uniform surface light distribution.

[0006] Embodiments of the present invention may provide a lighting device having a uniform surface light distribution by optimizing the area of the light-emitting device and the area of the light-shielding member.

[0007] Technical Solution

[0008] A lighting device according to an embodiment of the present invention includes: a substrate; a resin layer disposed on the substrate; a plurality of light-emitting devices sealed in the resin layer and electrically connected to the substrate; an optical film disposed on the resin layer; an adhesive layer disposed between the optical film and the resin layer; and a plurality of light-shielding members including light-shielding patterns disposed on a lower surface of the optical film, and at least a part of the plurality of light-shielding members overlaps with each of the plurality of light-emitting devices in a vertical direction, wherein each of the plurality of light-emitting devices includes a light-emitting surface that emits light to one side, an upper surface area of each of the plurality of light-shielding members is in a range of 6 to 10 times an upper surface area of each of the plurality of light-emitting devices, and a light uniformity on the optical film may be 80% or more.

[0009] According to an embodiment of the present invention, the lighting device includes an air gap portion disposed between each of the plurality of light-shielding members and the resin layer, and a lower surface area of the air gap portion may be in a range of 6 to 10 times an upper surface area of each of the plurality of light-emitting devices.

[0010] According to an embodiment of the present invention, the distance between adjacent light-shielding members and light-emitting devices may be in the range of 0.15 times to 0.55 times the pitch between the light-emitting devices.

[0011] According to an embodiment of the present invention, the pitch between the light-emitting devices may be in the range of 17 mm to 23 mm.

[0012] According to an embodiment of the present invention, when the upper surface area of each light-shielding member is 8 times the upper surface area of the light-emitting device, the light uniformity may be the highest.

[0013] According to an embodiment of the present invention, the pitch between the light-emitting devices may be 18 mm ± 1 mm.

[0014] According to an embodiment of the present invention, the upper surface area of each of the plurality of light-shielding members may be in the range of 6 times to 10 times the light-emitting surface area of each of the plurality of light-emitting devices.

[0015] According to an embodiment of the present invention, each light-emitting device emits light in a first direction, the length of each light-emitting device in a second direction is greater than the length in the first direction, the length of each light-emitting device in the second direction is D1, and when the length of each light-shielding member in the second direction is C3, the following condition may be satisfied: 2 < C3 / D1 < 3.

[0016] A vehicle lamp according to an embodiment of the present invention includes a lamp having the lighting device disclosed above, and the lamp may include at least one of a side mirror lamp, a contour lamp, a fog lamp, a tail lamp, a brake lamp, a daytime running lamp, an interior lamp, a door surround lamp, a rear combination lamp, and a reverse lamp.

[0017] Advantageous Effects

[0018] According to an embodiment of the present invention, the lighting device and the lamp may have improved light characteristics. Specifically, a hot spot caused by light emitted from the light-emitting device may be prevented by the light-shielding member provided on the resin layer, and a uniform light distribution may be provided.

[0019] According to an embodiment of the present invention, a uniform surface light distribution may be achieved by optimizing the pitch between the light-emitting devices and the area of the light-shielding member, thereby improving the light uniformity and the light-shielding effect.

[0020] According to an embodiment of the present invention, the reliability of the lighting device or the vehicle lamp may be improved, and the lighting device or the vehicle lamp has a resin layer covering the light-emitting device and a light-shielding pattern on the resin layer, wherein the light-emitting chip is molded in the light-emitting device. Description of the Drawings

[0021] Figure 1An example of a plan view of a lighting device according to an embodiment of the present invention.

[0022] Figure 2 is Figure 1 An example of a partially enlarged view of the lighting device.

[0023] Figure 3 is Figure 1 An example of a cross-sectional view taken along the line A-A of the lighting device.

[0024] Figure 4 is Figure 3 A partially enlarged view of the lighting device.

[0025] Figure 5 A graph comparing the ratio of the area of a light-shielding member to the area of a light-emitting device and the light uniformity according to the spacing between light-emitting devices in a lighting device according to an embodiment of the present invention.

[0026] Figure 6 A view showing a lamp having a lighting device according to an embodiment of the present invention.

[0027] Figure 7 is an application of Figure 6 A plan view of a vehicle with a vehicle headlamp. Detailed Description of the Invention

[0028] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0029] The technical spirit of the present invention is not limited to the embodiments to be described, but can be implemented in various other forms, and within the scope of the technical spirit of the present invention, one or more components can be selectively combined and used interchangeably. Additionally, unless specifically defined and clearly described, the terms (including technical terms and scientific terms) used in the embodiments of the present invention can be interpreted as the meanings commonly understood by those of ordinary skill in the art to which the present invention pertains, and the terms commonly used (such as those defined in a dictionary) should be able to be interpreted in light of the context of the relevant technology. Furthermore, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention. In this specification, unless specifically stated otherwise in the wording, the singular form may also include the plural form, and in the case of describing at least one (or more than one) of A and (as well as) B, C, it may include more than one of all combinations that can be formed by A, B, and C. When describing the components of the embodiments of the present invention, terms such as first, second, A, B, (a), and (b) may be used. Such terms are only used to distinguish the components from other components and do not determine these terms by the nature, order, or process of the corresponding components. When describing that a component is "connected", "coupled", or "joined" to another component, such description may include not only directly connecting, coupling, or joining to the other component, but also "connecting", "coupling", or "joining" through another component between the component and the other component. Additionally, in the case of being described as formed or provided "above (on)" or "below (under)" each component, such description includes not only the case where the two components are in direct contact with each other, but also the case where one or more other components are formed or provided between the two components. Furthermore, when expressed as "above (on)..." or "below (under)...", it may refer to the downward direction and upward direction with respect to one element.

[0030] The lighting device according to the present invention can be applied to various lamp devices that require lighting, such as vehicle lamps, home lighting devices, or industrial lighting devices. For example, when applied to vehicle lamps, it can be applied to headlamps, sidelights, side rearview mirror lamps, fog lamps, taillights, brake lights, daytime running lights, vehicle interior lights, door scar lights, rear combination lights, reverse lights, etc. The lighting device of the present invention can be applied to indoor and outdoor advertising devices, display devices, and various electric vehicle fields. In addition, it can be applied to all lighting-related fields or advertising-related fields that are currently being developed and commercialized or can be realized according to future technological developments.

[0031] Figure 1 is an example of a plan view of a lighting device according to an embodiment of the present invention, Figure 2 is Figure 1An example of a partial enlarged view of the lighting device, Figure 3 is Figure 1 An example of a cross-sectional view taken along line A-A of the lighting device, Figure 4 is Figure 3 A partial enlarged view of the lighting device, Figure 5 In the lighting device according to an embodiment of the present invention, it is a graph comparing the ratio of the area of the light-shielding member to the area of the light-emitting device and the light uniformity according to the spacing between the light-emitting devices.

[0032] Referring to Figures 1 to 4 , the lighting device 400 according to an embodiment of the present invention may include a substrate 401, a plurality of light-emitting devices 100, a resin layer 420, a plurality of light-shielding members 450, and an optical film 430. The optical plate may include the optical film 430 and a plurality of light-shielding members 450, and the light-shielding members 450 may be formed on the upper surface or the lower surface of the optical film 430. The lighting device 400 may be defined as a lighting module or a light-emitting module.

[0033] The lighting device 400 may include a reflective member 410 disposed between the substrate 401 and the resin layer 420. The lighting device 400 may emit the light emitted from the plurality of light-emitting devices 100 as surface light. The lighting device 400 may be defined as a light-emitting unit or a light source module. The lighting device 400 may include one light-emitting unit or a plurality of light-emitting units on the substrate 401. Here, the lighting device 400 may include a first side surface S1 and a second side surface S2 located on opposite sides in the second direction Y, and a third side surface S3 and a fourth side surface S4 located on opposite sides in the first direction X. The first side surface S1 and the second side surface S2 may face each other and may be on the opposite sides of the substrate 401 and the resin layer 420. The third side surface S3 and the fourth side surface S4 may face each other and may be on different sides of the substrate 401 and the resin layer 420. The resin layer 420 covers the plurality of light-emitting devices 100, guides the light emitted from each light-emitting device 100, and emits the guided light in the form of surface light through the upper surface. The resin layer 420 may eliminate a light guide plate made of a transparent acrylic (e.g., PMMA) material and use a resin material with a thin thickness (such as silicone resin or epoxy resin) as the light guide member.

[0034] The substrate 401 may include a printed circuit board (PCB). The substrate 410 may include at least one of, for example, a resin-based PCB, a metal core PCB, a flexible material PCB, a ceramic material PCB, or an FR-4 substrate. When the substrate 401 is a metal core PCB with a metal layer disposed at the bottom, the heat dissipation efficiency of the light-emitting device 100 can be improved. The substrate 401 may be electrically connected to a plurality of light-emitting devices 100. The substrate 401 includes a wiring layer (not shown) on the upper side, and the wiring layer may be electrically connected to a plurality of light-emitting devices 100. The plurality of light-emitting devices 100 may be connected in series, parallel, or series-parallel through the wiring layer. The substrate 401 may be used as a base member or a support member disposed below the plurality of light-emitting devices 100 and the resin layer 420. The substrate 401 may be provided as a transparent material or an opaque material. When the substrate 401 is a transparent material, the light emitted from the light-emitting device 100 can be extracted to the lower side of the substrate 401. The substrate 401 may include an insulating layer (not shown) covering the wiring layer, and the insulating layer may be implemented in white. In this case, the reflection function can be achieved without the reflection member 410.

[0035] The upper surface of the substrate 401 may be a flat surface or a curved surface. The thickness of the substrate 401 may be the height in the vertical direction or the Z direction. According to the shape of the lamp or the lighting device 400, the substrate 401 may have a long strip shape, a polygonal shape, or a curved shape in one direction. The substrate 401 may have a longer length in the first direction X in which light is emitted, or a longer length in the second direction Y orthogonal to the direction in which light is emitted. In the drawings, the X direction may be the first direction, the Y direction may be the second direction, and the Z direction may be the direction orthogonal to the first direction and the second direction. The length of the substrate 401 in the first direction X may be greater than or less than the width in the second direction Y. Additionally, the side surfaces (e.g., S1, S2) in the longitudinal direction of the substrate 401 may be a flat surface or a curved surface. For example, the substrate 401 may include a reflection member 410. The reflection member 410 may be an insulating layer that protects a circuit pattern (having pads disposed on the substrate 401), or a reflective material layer.

[0036] A plurality of light-emitting devices 100 are arranged on a substrate 401 and emit light in a first direction X. The plurality of light-emitting devices 100 may be arranged in one row or two rows. The light-emitting devices 100 may be arranged in an M×N matrix on the substrate 401, and M and N may be integers greater than or equal to 2. The plurality of light-emitting devices 100 may emit light in one direction or in directions facing each other. As another example, each of the plurality of light-emitting devices 100 may emit light in a second direction Y. Additionally, at least one of the plurality of light-emitting devices 100 may emit light in a direction between the first direction and the second direction. As another example, the plurality of light-emitting devices 100 may be arranged along two side surfaces S3 and S4 of the substrate 401 and may emit light toward the opposite side surfaces S3 and S4. Here, the plurality of light-emitting devices 100 may be arranged to be non-facing but staggered on the two side surfaces S3 and S4 of the substrate 401.

[0037] The light-emitting device 100 may have a light-emitting surface 81 that emits light with the highest light intensity on one side (e.g., S4), and the light-emitting surface 81 may extend, for example, in a third direction Z or in a vertical direction with respect to the horizontal upper surface of the substrate 401. The light-emitting surface 81 may be a vertical plane or may include a concave surface or a convex surface.

[0038] Each light-emitting device 100 may include a package having a plurality of light-emitting chips 71 and 72 or a package in which at least one light-emitting chip is encapsulated. The light-emitting chips 71 and 72 may be molded by a molding member 80. The light-emitting chips 71 and 72 may be arranged in a plurality in a direction Y orthogonal to the first direction X, and for example, may include a first light-emitting chip 71 and a second light-emitting chip 72 spaced apart from each other. The light-emitting surface 81 of each light-emitting device 100 may be the outer surface of the molding member 80. The molding member 80 may be a transparent resin material such as silicone resin or epoxy resin. The light-emitting chips 71 and 72 may emit at least one of blue, red, green, ultraviolet (UV), and infrared, and each light-emitting device 100 may emit at least one of white, blue, red, green, and infrared. Each of the first light-emitting chip 71 and the second light-emitting chip 72 may emit the same color or different colors. The material of the molding member 80 may be the same as or different from the material of the resin layer 420.

[0039] The light-emitting device 100 may be a side view type bottom electrically connected to the substrate 401, but is not limited thereto. As another example, the light-emitting device 100 may be an LED chip or a top-emitting package. The light-emitting surface 81 of the light-emitting device 100 may be provided on at least one side other than the upper surface of the light-emitting device 100. The light-emitting surface 81 may be a side of the light-emitting device 100 adjacent to the substrate 401 or a side perpendicular to the upper surface of the substrate 401. The light-emitting surface 81 is provided on one side between the lower surface and the upper surface of the light-emitting device 100 and emits the highest intensity of light in the first direction. The light-emitting surface 81 of the light-emitting device 100 may be a surface adjacent to the reflection member 410 or a surface perpendicular to the upper surface of the substrate 401 or the upper surface of the reflection member 410. The area of the light-emitting surface 81 of each light-emitting device 100 may be 120% or less of the upper surface area of the light-emitting device 100, for example, 80% to 120% or 80% to 100%. The area of the light-emitting surface 81 of each light-emitting device 100 may be 90% ± 10% of the upper surface area of the light-emitting device 100.

[0040] A part of the light emitted through the light-emitting surface 81 of the light-emitting device 100 may travel in a direction parallel to the upper surface of the substrate 401, be reflected by the reflection member 410, or may travel toward the upper surface of the resin layer 420. The thickness of the light-emitting device 100 may be, for example, 3 mm or less, for example, in the range of 0.4 mm to 3 mm. The length ( Figure 2 D1) of the light-emitting device 100 in the second direction may be 1.5 times or more the thickness of the light-emitting device 100. The light direction angle of the light emitted by the light-emitting device 100 in the first direction X in the ±Y direction may be wider than the light direction angle in the ±Z direction. The light direction angle of the light-emitting device 100 in the second direction may be 110 degrees or more, for example, 120 degrees to 160 degrees or 140 degrees or more. The light direction angle of the light-emitting device 100 in the third direction may be 110 degrees or more, for example, in the range of 120 degrees to 140 degrees.

[0041] The reflective member 410 may be a layer that is separately joined to the upper portion of the substrate 401 or a layer that protects the upper portion of the substrate 401. For example, the reflective member 410 may be disposed between the substrate 401 and the resin layer 420. The reflective member 410 may be provided in the form of a film. The reflective member 410 may be joined to the upper surface of the substrate 401. The area of the reflective member 410 may be smaller than the area of the upper surface of the substrate 401. The reflective member 410 may be spaced apart from the edge of the substrate 401, and the resin layer 420 may be attached to the substrate 401 in the spaced-apart region. At this time, peeling of the edge portion of the reflective member 410 can be prevented. The reflective member 410 may include a plurality of openings 417, in which the lower portion of each light-emitting device 100 is disposed. The upper surface of the substrate 401 is exposed through the openings 417 of the reflective member 410, and the lower portions of each light-emitting device 100 may be electrically joined. The size of each opening 417 may be set to be equal to or greater than the size of each light-emitting device 100. The reflective member 410 may be in contact with the upper surface of the substrate 401 or may be adhered between the resin layer 420 and the substrate 401. Here, when a highly reflective material is coated on the upper surface of the substrate 401, the reflective member 410 may be removed.

[0042] The reflective member 410 may be formed with a thickness thinner than the thickness of the light-emitting device 100. The thickness of the reflective member 410 may include a range of 0.2 mm ± 0.02 mm. The lower portion of the light-emitting device 100 may penetrate through the opening 417 of the reflective member 410, and the upper portion of the light-emitting device 100 may protrude. The light-emitting surface 81 of each light-emitting device 100 may be disposed in a direction perpendicular to the upper surface of the reflective member 410.

[0043] The reflective member 410 may contain a metal material or a non-metal material. The metal material may include metals such as aluminum, silver, or gold. The non-metal material may include a plastic material or a resin material. The resin material may be a reflective material such as a metal oxide (such as, TiO 2 、Al 2 O 3 、), SiO 2 added to silicone resin or epoxy resin. The reflective member 410 may be implemented as a single layer or a multi-layer, and the light reflection efficiency may be improved through such a layer structure. The reflective member 410 according to an embodiment of the present invention may increase the amount of light by reflecting incident light to make the light evenly distributed.

[0044] The resin layer 420 may be disposed on the substrate 401. The resin layer 420 may face or adhere to the substrate 401. The resin layer 420 may be disposed on the entire upper surface of the substrate 401 or on a part of the upper surface. The lower surface area of the resin layer 420 may be equal to or smaller than the upper surface area of the substrate 401. The resin layer 420 may be formed of a transparent material and may guide or diffuse light. The resin layer 420 may comprise a UV curable resin material, may be used to replace a light guide plate, and may have the effect of facilitating control of the refractive index and thickness. Since the resin layer 420 is provided as a layer for guiding light with resin, it may be provided with a thinner thickness than in the case of glass and may be provided as a flexible plate. The resin layer 420 may emit the point light source emitted from each light emitting device 100 in the form of linear light or surface light. The resin layer 420 may include beads (not shown), and the beads may diffuse and reflect incident light, thereby increasing the amount of light. The beads may be provided in the range of 0.01% to 0.3% with respect to the weight of the resin layer 420. The beads may be composed of any one selected from silicon, silica, glass bubbles, PMMA (polymethyl methacrylate), urethane, Zn, Zr, Al 2 O 3 and acrylic, and the particle size of the beads may be in the range of about 1 μm to about 20 μm, but is not limited thereto.

[0045] The thickness of the resin layer 420 may be 1.8 mm or more, for example, in the range of 1.8 mm to 2.5 mm. If the thickness of the resin layer 420 is thicker than the above range, the brightness may be reduced, and it may be difficult to provide a flexible module due to an increase in the module thickness. If the thickness of the resin layer 420 is less than the above range, it may be difficult to provide a surface light source with uniform brightness. The resin layer 420 seals the periphery of each of the plurality of light emitting devices 100 to protect each light emitting device 100 and may reduce the loss of light emitted from each light emitting device 100. The upper part of each light emitting device 100 may be buried in the lower part of the resin layer 420. The resin layer 420 may contact the surface (e.g., a plurality of side surfaces and the upper surface) of each light emitting device 100 so that it may contact the light emitting surface 81 of each light emitting device 100. A part of the resin layer 420 may be disposed in the opening 417 of the reflection member 410.

[0046] The adhesive layer 415 can be an adhesive material such as silicone or epoxy resin, or can include a diffusive material. The diffusive material can include at least one of polyester (PET), polymethyl methacrylate (PMMA), or polycarbonate (PC). The adhesive layer 415 can be a transparent resin material. The adhesive layer 415 can be adhered to the upper surface of the resin layer 420. The adhesive layer 415 can adhere the optical film 430 to the upper surface of the resin layer 420. The interior of the adhesive layer 415 can include a plurality of light-shielding members 450 and a plurality of air-gap portions 427. The adhesive layer 415 can be adhered to the outer periphery of each light-shielding member 450, the lower surface of the optical film 430, and the upper surface of the resin layer 420. The upper surface area of the adhesive layer 415 within the upper surface of the resin layer 420 can be larger than the upper surface area of the light-shielding member 450.

[0047] The plurality of light-shielding members 450 can face the upper surface of the resin layer 420. The plurality of light-shielding members 450 can overlap the light-emitting device 100 in the vertical direction or the third direction. A part of each of the plurality of light-shielding members 450 can overlap each of the plurality of light-emitting devices 100 in the vertical direction. The plurality of light-shielding members 450 can be disposed between the resin layer 420 and the optical film 430. The light-shielding member 450 can have a light-shielding pattern P1 and can be formed on the lower surface of the optical film 430. The optical film 430 can include a plurality of light-shielding members 450 printed on the lower surface. As another example, the light-shielding member 450 can have a light-shielding pattern and can be printed on the upper surface of the optical film 430. The light-shielding member 450 has a light-shielding pattern and can be formed on the upper surface of the resin layer 430. As another example, when the optical films 430 are arranged in plurality, the light-shielding members 450 can be disposed between the plurality of optical films and can be formed on the upper surface of the lower optical film or the lower surface of the upper optical film.

[0048] The light-shielding member 450 can be disposed within the adhesive layer 415. The light-shielding member 450 can penetrate the adhesive layer 415 and can be in contact with at least one of the resin layer 420 and the optical film 430. The light-shielding member 450 can not be in contact with the adhesive layer 415. A region spaced apart from the interior of the adhesive layer 415 and / or the upper surface of the resin layer 420 can be defined as the air-gap portion 427. The air-gap portion 427 can provide a refractive index different from that of the light-shielding member 450 and the adhesive layer 415, thereby improving the light diffusion efficiency. The lowermost surface of the light-shielding member 450 can be spaced apart from or not in contact with the upper surface of the underlying layer (e.g., the upper surface of the resin layer 420). The air-gap portion 427 can be a vacuum region.

[0049] The interval B1 between adjacent light-shielding members 450 may be smaller than the interval X1 between adjacent light-emitting devices 100. The interval B1 between adjacent light-shielding members 450 may be larger than the interval X2 between an adjacent light-shielding member 450 and a light-emitting device 100. The interval X2 between an adjacent light-shielding member 450 and a light-emitting device 100 may be 1 mm or more and may be smaller than the central length of the light-shielding member 450 in the first direction X. The ratio of the interval X1 between adjacent light-emitting devices 100 and the interval X2 between an adjacent light-shielding member 450 and a light-emitting device 100 may be in the range of 2.5:1 to 3.5:1. By setting each of the items X1, X2, and B1 to this ratio, the light uniformity of the shadow area can be improved. Each light-shielding member 450 may be spaced apart from the upper surface of the resin layer 420. Each light-shielding member 450 may be spaced apart from the outer surface of the adhesive layer 415. The plurality of light-shielding members 450 may have the same shape and may be provided on each light-emitting device 100. Each light-shielding member 450 may be provided in a region perpendicular to each light-emitting device 100, in the emission side region of each light-emitting device 100, and in two emission side regions.

[0050] The light-shielding member 450 may be a region printed with a white material. The light-shielding member 450 may be formed of a light-shielding material having at least one of diffusing agents such as TiO 2 , Al 2 O 3 , CaCO 3 , BaSO 4 and silicon in a resin material. The light-shielding member 450 may reflect the light emitted through the light-emitting surface 81 of the light-emitting device 100, thereby reducing the occurrence of hot spots on the optical film 430 overlapping the light-emitting device 100 in the vertical direction. The light-shielding member 450 may print a light-shielding pattern P1 using a light-shielding material. The light-shielding member 450 may be formed in such a manner as to be printed on the lower surface of the optical film 430. The light-shielding member 450 is a material that does not block 100% of the incident light, may have a transmittance lower than the reflectance, and may perform the functions of light-shielding and diffusion. The transmittance of the light-shielding member 450 may be less than 12%, for example, in the range of 6% to 11%. If the transmittance of the light-shielding member 450 is lower than the above range, dark portions may appear, and if it is higher than the above range, the light uniformity may deteriorate.

[0051] The light-shielding member 450 may be formed as a single layer or multiple layers and may have different pattern shapes according to regions. The thickness of the light-shielding member 450 may have different thicknesses or heights according to regions. The light-shielding member 450 may have the thickest thickness in the region overlapping with the light-emitting surface 81 of each light-emitting device 100 and the thinnest thickness in the edge region. In the light-shielding member 450, based on the region overlapping with the light-emitting surface 81 of the light-emitting device 100, the thickness of the region closer to the light-emitting surface 81 may be thicker, and the thickness of the region farther from the light-emitting surface 81 may be thinner. The minimum pattern in the pattern P1 of the light-shielding member 450 may have a polygonal shape, such as a square, a circle, or an ellipse. The maximum pattern in the pattern P1 of the light-shielding member 450 may have a shape with an area larger than the upper surface area of the light-emitting device 100. Here, the maximum pattern may be the pattern layer with the thickest thickness in each light-shielding member 450. The light-shielding member 450 may be provided to be higher than the upper surface of the resin layer 420. The lowermost surface of the light-shielding member 450 may be provided to be higher than the upper surface of the resin layer 420. Depending on the thickness or height of the optical film 430, the light-shielding member 450 may include at least two layers, such as at least three layers.

[0052] The thickness of the light-shielding member 450 may be 35 μm or more, for example, in the range of 35 μm to 200 μm. When the thickness of the light-shielding member 450 is less than 35 μm, it may be difficult to effectively shield the light incident from below the light-shielding member 450, or the transmittance may increase, resulting in non-uniform light distribution on the light-shielding member 450. In addition, when the thickness of the light-shielding member 450 exceeds 200 μm, although the light emitted from each light-emitting device 100 can be effectively controlled to form hot spots, the light emitted from each light-emitting device 100 may be lost during passing through the light-shielding member 450, resulting in a decrease in overall brightness. Therefore, preferably, the thickness of the light-shielding member 450 satisfies the above range. The minimum thickness of the light-shielding member 450 is 35 μm or more and may satisfy, for example, 35 μm to 50 μm, and preferably may satisfy the range of 35 μm to 45 μm. If the minimum thickness of the light-shielding member 450 is less than the above range, the transmittance range disclosed above may be exceeded and the light uniformity may decrease. If it is greater than the above range, the transmittance range disclosed above may decrease and dark portions may appear.

[0053] The maximum thickness of the light-shielding member 450 is 100 μm or more, which can satisfy, for example, the range of 100 μm to 200 μm. Preferably, it can satisfy the range of 110 μm to 150 μm or 110 μm to 130 μm. If the maximum thickness of the light-shielding member 450 is less than the above range, the light transmittance may exceed the transmittance range disclosed above, and the light uniformity may deteriorate. If the maximum thickness of the light-shielding member 450 is greater than the above range, the light transmittance may be lower than the transmittance range disclosed above, and dark portions may appear. The light-shielding member 450 may include a region having an intermediate thickness (i.e., an intermediate layer). The thickness of the intermediate region is 70 μm or more, which can satisfy, for example, the range of 70 μm to 140 μm, and preferably satisfies the range of 70 μm to 110 μm or 75 μm to 100 μm. If the intermediate thickness of the light-shielding member 450 is less than the above range, the light transmittance may exceed the transmittance range disclosed above, and the light uniformity may deteriorate. If the intermediate thickness of the light-shielding member 450 is greater than the above range, the light transmittance may be lower than the transmittance range disclosed above, and dark portions may appear. The maximum thickness may be greater than the sum of the minimum thickness and the intermediate thickness.

[0054] As Figure 4 shown, the light-shielding member 450 may include a first light-shielding portion 451, a second light-shielding portion 452, and a third light-shielding portion 453. At least one or all of the first light-shielding portion 451, the second light-shielding portion 452, and the third light-shielding portion 453 may contain a light-shielding material. The first light-shielding portion 451 may have a minimum thickness, the second light-shielding portion 452 may have a medium thickness, and the third light-shielding portion 453 may have a maximum thickness. The upper surface area of the first light-shielding portion 451 may be greater than the upper surface area of each of the first light-shielding portion 451 and the second light-shielding portion 452. Preferably, it may be greater than the sum of the upper surface area of the first light-shielding portion 451 and the upper surface area of the second light-shielding portion 452. The light uniformity caused by light shielding can be improved by the upper surface areas of these light-shielding portions 451, 452, and 453. Each of the first light-shielding portion 451, the second light-shielding portion 452, and the third light-shielding portion 453 may not overlap with each other in the vertical direction. The pattern of each of the first light-shielding portion 451, the second light-shielding portion 452, and the third light-shielding portion 453 may form an upper corner or an upper circumference without rounding. The uniformity of the pattern of each light-shielding member is improved by these light-shielding portions, and the brightness and luminous flux can be increased. The light-shielding member 450 may include light-shielding portions having different thicknesses for each region. The light-shielding member 450 may be formed of the same material, and the light-shielding portions 451, 452, and 453 have different thicknesses.

[0055] In the light-shielding member 450, the first light-shielding portion 451 may include a first region having a dense pattern on the light-emitting surface 81 of the light-emitting device 100 and a second region having a pattern with a lower density than the density of the pattern of the first region. The pattern of the first light-shielding portion 451 may be provided around the second light-shielding portion 452 and the third light-shielding portion 453. The first region having the dense pattern covers the upper portion of the light-emitting surface 81 of the light-emitting device 100, thereby improving the distribution of light reaching the optical film 430 through the first light-shielding portion 451. The gap between the patterns of the first region and the second region of the first light-shielding portion 451 may gradually increase as the distance from the light-emitting surface 81 of the light-emitting device 100 increases. The size of each pattern of the first region may gradually decrease as the distance from the light-emitting surface 81 of the light-emitting device 100 increases. Both sides of the third light-shielding portion 453 may be in contact with or separated from the first light-shielding portion 451, and one side and the other side may be in contact with or separated from the second light-shielding portion 452. The outer surface of the second light-shielding portion 452 may be in contact with or separated from the first light-shielding portion 451 and the third light-shielding portion 453. The light-emitting surface 81 of the light-emitting device 100 may vertically overlap the second light-shielding portion 452 and the third light-shielding portion 453. The light-emitting surface 81 of the light-emitting device 100 may vertically overlap the light-shielding pattern P1. Since the light intensity of the light traveling bidirectionally in the second direction Y based on the light-emitting device 100 is at least 50% less than the light intensity in the first direction X, even if the lengths of the second light-shielding portion 452 and the third light-shielding portion 453 in the second direction Y are set to be the same, a decrease in light-shielding efficiency can be prevented.

[0056] As Figure 1 and Figure 2 shown, when viewed from a top view of the light-shielding member 450, the upper surface area of the region formed by the virtual line R1 connecting the outer edges of the upper pattern P1 may be more than 5 times, for example, 5 to 12 times or 6 to 10 times the upper surface area of the light-emitting device 100. The maximum area of the region formed by the virtual line R1 connecting the outer patterns of the light-shielding member 450 may be the upper surface area of the light-shielding member 450. The upper surface area of the light-shielding member 450 may be the area of the region connecting the outer edges of the uppermost pattern. At this time, the pitch between the light-emitting devices may be 15 mm or more, for example, 15 mm to 25 mm.

[0057] The lower surface area of the light-shielding member 450 may be the area of the region connecting the outer edges of the patterns of the third light-shielding portion 453 and may be the minimum area. The lower surface area of each light-shielding member 450 may be at least 1 time, for example, in the range of 1 to 2.5 times or 1.5 to 2.5 times the upper surface area of each light-emitting device 100. Therefore, the problem of the light-emitting device 100 being visible from the outside can be reduced, and hot spots on the region of the light-emitting device 100 can be reduced, thereby providing a uniform light distribution over the entire region.

[0058] According to the outer surface area of the pattern P1, each of the plurality of light-shielding members 450 may include a first edge 461, a second edge 462, and a third edge 463. The first edge 461 is a region that is at least partially adjacent to or vertically overlaps each light-emitting device 100. The third edge 463 is a region opposite to the first edge 461. The second edge 462 is a line on both sides of each light-shielding member 450 in the second direction Y and may have a double-convex shape. The first edge 461 has a virtual straight-line shape, and the third edge 463 has a virtual straight-line shape and may have a straight-line length longer than the straight-line length of the first edge 461. The front portion of the third edge 463 includes protruding patterns 465 and 466 that protrude forward, and the protruding patterns 465 and 466 may face the light-emitting chips 71 and 72 of the light-emitting device 100 on a horizontal plane so that the intensity of the light emitted from each of the light-emitting chips 71 and 72 can be reduced.

[0059] The convex shape of the second edge 462 of the light-shielding member 430 may protrude toward the outside or the second side surface S2 in a region between one end of the first edge 461 and one end of the third edge 463, and may protrude toward the outside or the first side surface S1 in a region between the other end of the first edge 461 and the other end of the third edge 463. The length of the first edge 461 of the light-shielding member 450 in the second direction is set to be more than 0.8 mm longer than the length D1 of the light-emitting device 100 to cover both sides of the light-emitting surface of the light-emitting device 100 and prevent hot spots caused by the light emitted from the light-emitting device 100. The ratio of the length D1 of the light-emitting device 100 to the length C3 of the light-shielding member 450 may satisfy the following condition.

[0060] Condition: 2 < C3 / D1 < 3

[0061] If the above condition is satisfied, the light uniformity of the light-shielding member 450 and its surrounding environment can be improved. If it is less than the above range, hot spots may occur or the light uniformity may deteriorate, and if it is greater than the above range, light loss may occur or dark portions may appear.

[0062] The maximum length C3 of the light-shielding member 450 in the second direction Y may vary according to the length D1 of the light-emitting device 100 in the second direction Y. The maximum length C3 may be 9 mm or more, for example, in the range of 9 mm to 20 mm or 10 mm to 18 mm. The maximum length B3 of the light-shielding member 450 in the first direction X may be equal to or less than the maximum length C3 in the second direction Y. The maximum length B3 of the light-shielding member 450 in the first direction X may be 7 mm or more, for example, in the range of 7 mm to 13 mm. The length of the light-shielding member 450 may cover the upper side, front side, and both sides of the light-emitting surface 81 of the light-emitting device 100, prevent hot spots from being generated by the light emitted from the light-emitting device 100, and improve the light uniformity.

[0063] The adhesive layer 415 may be in contact with the outer side of the light-shielding member 450 or spaced apart by a distance of less than 1 mm. A straight line K1 perpendicular to the rear surface of the light-emitting device 100 may not overlap with the light-shielding member 450. A straight line K2 perpendicular to the front surface (or light-emitting surface) of the light-emitting device 100 may overlap with the light-shielding member 450 or may overlap with the region having the maximum thickness of the light-shielding member 450. The ratio of the length D2 of the light-emitting device 100 in the first direction X to the maximum length B3 of the light-shielding member 450 in the first direction X may satisfy the following conditions.

[0064] Condition: 3 < B3 / D2 < 7 or 4 ≤ B3 / D2 ≤ 6

[0065] If the above conditions are satisfied, the light uniformity of the light-shielding member 450 and its surrounding environment can be improved. If it is less than the above range, hot spots may occur or the light uniformity may deteriorate, and if it is greater than the above range, light loss may occur or dark portions may appear.

[0066] In Figure 5 and Table 1, the X-axis represents the configuration in which the upper surface area of the light-shielding member is 6 to 10 times the upper surface area of the light-emitting device, and the Y-axis represents the light uniformity. In this structure, when the upper surface area of the light-shielding member 450 is 6 to 10 times the upper surface area of the light-emitting device 100, it can be seen that the light uniformity of the lighting device 400 reaches 80% or more. In addition, when the upper surface area of the light-shielding member 450 is 8 times the upper surface area of the light-emitting device 100, it can be seen that the light uniformity of the lighting device 400 is higher than when the upper surface area of the light-shielding member 450 is 6 times or 10 times the upper surface area of the light-emitting device 100. The distance between the light-emitting devices may be 15 mm or more. For example, in the range of 15 mm to 25 mm or in the range of 17 mm to 23 mm. For example, the distance A is measured as 18 mm ± 1 mm, the distance B is measured as 20 mm ± 1 mm, and the distance C is measured as 22 mm ± 1 mm. When the distance between the light-emitting devices is A, B, C and the upper surface area of the light-shielding member is 6 to 10 times the upper surface area of the light-emitting device, it can be seen that the light-emitting devices have a light uniformity of 80% or more. At this time, when the area of the light-shielding member is the same, it can be seen that the light uniformity at the distance A is higher than the light uniformity at the distance B, and the light uniformity at the distance B is higher than the light uniformity at the distance C.

[0067] Therefore, when the light uniformity recognized as a uniform surface light source of the lighting device is 80% or more, the upper surface area of each light-shielding member relative to the area of each light-emitting device may be in the range of 6 to 10 times.

[0068] [Table 1]

[0069]

[0070] In addition, for a light uniformity of 80% or more, the ratio of the pitch X1 between the light-emitting devices to the interval X2 between the adjacent light-shielding member 450 and the light-emitting device 100 can be set as follows. The interval X2 between the adjacent light-shielding member 450 and the light-emitting device 100 can be in the range of 0.15 times to 0.55 times the pitch X1 between the light-emitting devices. For example, when the upper surface area of the light-shielding member 450 is 6 times the upper surface area of the light-emitting device 100, the interval X2 between the adjacent light-shielding member 450 and the light-emitting device 100 can be 0.45 times or more the pitch X1 between the light-emitting devices, for example, in the range of 0.45 times to 0.55 times the pitch X1 between the light-emitting devices.

[0071] When the upper surface area of the light-shielding member is 8 times the upper surface area of the light-emitting device, the interval X2 between the adjacent light-shielding member 450 and the light-emitting device 100 can be 0.3 times or more the pitch X1 between the light-emitting devices 100, for example, in the range of 0.3 times to 0.45 times. When the upper surface area of the light-shielding member is 10 times the upper surface area of the light-emitting device, the interval X2 between the adjacent light-shielding member 450 and the light-emitting device 100 can be 0.35 times or less the pitch X1 between the light-emitting devices 100, for example, in the range of 0.15 times to 0.35 times.

[0072] Table 2 shows the light uniformity that can be obtained according to the ratio of the upper surface area of the light-emitting device to the upper surface area of the light-shielding member, the pitch X1 of the light-emitting devices, and the interval X2 (e.g., horizontal distance) between the adjacent light-emitting device and the light-shielding member as follows.

[0073] [Table 2]

[0074]

[0075] In addition, the lower surface area of the air gap portion 427 can be the same as the upper surface area of the light-shielding member 450, or can differ from the upper surface area of the light-shielding member 450 by 5% or less, and can have a range of 6 times to 10 times the upper surface area of the light-emitting device. As shown in Table 3, the light uniformity according to the pitch of the light-emitting devices can be obtained.

[0076] [Table 3]

[0077]

[0078] In addition, the upper surface area of the light-shielding member can be 6 times to 10 times the area of the light-emitting surface of the light-emitting device. As shown in Table 4, the light uniformity according to the pitch of the light-emitting devices can be obtained.

[0079] [Table 4]

[0080]

[0081] Through these Tables 1 to 4, these items can be optimized: such as the upper surface area of the light-shielding member, the lower surface area of the air gap portion, the spacing between the light-emitting devices, the upper surface area of the light-emitting devices, or the area of the light-emitting surface, so that the light uniformity is 80% or more.

[0082] Table 5 shows the values of the light uniformity measured in the embodiments of the present invention when the spacing between the light-emitting devices is 10 mm, 15 mm, 20 mm, or 25 mm and the upper surface area of the light-shielding member is 2 to 20 times the upper surface area of the light-emitting devices. Based on the measured values in Table 5, when the area of the light-shielding member is 2 to 10 times the upper surface area of the light-emitting devices, a light uniformity of 70% or more can be obtained.

[0083] [Table 5]

[0084]

[0085]

[0086] In addition, it can be seen that: even if the upper surface area of the light-shielding member is more than twice the upper surface area of the light-emitting devices, when the spacing between the light-emitting devices is 25 mm, the light uniformity will be reduced to 50% or less. In addition, when the upper surface area of the light-shielding member is more than 10 times the upper surface area of the light-emitting devices, it can be seen that: when the spacing between the light-emitting devices is 10 mm, 15 mm, 20 mm, or 25 mm, most of the light uniformity is reduced to 50% or less.

[0087] The optical film 430 can be disposed on the resin layer 420. An adhesive layer 415 and a light-shielding member 450 can be arranged on the lower surface of the optical film 430. The optical film 430 can have a light-shielding member 450 printed on the lower surface and can be fixed to the resin layer 420 through the adhesive layer 415. The optical film 430 can include at least one of a polyester (PET) film, a PMMA (polymethyl methacrylate) material, or a PC (polycarbonate). The optical film 430 can be provided as a film made of a resin material such as silicone resin or epoxy resin. The optical film 430 can include a single layer or multiple layers. As another example, when a lower optical film (not shown) is provided between the adhesive layer 415 and the resin layer 420, the lower optical film can adhere to the resin layer 420. For example, the upper surface of the resin layer 420 can adhere to the lower optical film through a first adhesive force having fine cilia. At this time, the optical film 430 and / or the lower optical film can be attached to the resin layer 420 by applying a predetermined pressure or pressure / heat.

[0088] The thickness of the optical film 430 is 25 μm or more, and can be, for example, in the range of 25 μm to 250 μm or in the range of 100 μm to 250 μm. The optical film 430 can provide incident light as a uniform surface light source within the thickness range. The optical film 430 and / or the lower optical film may include at least one or two or more of dispersants such as beads, phosphors, and ink particles. The phosphor may include at least one of, for example, a red phosphor, an amber phosphor, a yellow phosphor, a green phosphor, or a white phosphor. The ink particles may include at least one of metal ink, UV ink, and curable ink. The size of the ink particles may be smaller than the size of the phosphor. The surface color of the ink particles may be any one of green, red, yellow, and blue. The above ink types may be selectively applied from PVC (polyvinyl chloride) ink, PC (polycarbonate) ink, ABS (acrylonitrile butadiene styrene copolymer) ink, UV resin ink, epoxy resin ink, silicone resin ink, PP (polypropylene) ink, water-based ink, plastic ink, PMMA (polymethyl methacrylate) ink, and PS (polystyrene) ink. The ink particles may include at least one of metal ink, UV ink, or curable ink.

[0089] In an embodiment of the present invention, the light diffused by the resin layer 420 can pass through the adhesive layer 415 and be emitted as uniform surface light through the optical film 430. At this time, the light-shielding member 450 can prevent hot spots caused by incident light. In another example of the present invention, a reflective material layer or an upper substrate may be provided on the resin layer 420. The reflective material layer or the upper substrate may face the upper surface of the resin layer 420, the light-emitting devices 100 are arranged in at least one row or at least one column, and each light-emitting surface 81 of the light-emitting devices 100 is provided at the same interval as one side of the resin layer 420, and the light can be emitted through one side of the resin layer 420.

[0090] Meanwhile, the light-shielding member 450 according to an embodiment of the present invention can be printed on the surface of the optical film 430. By the printing method, a light-shielding pattern is formed, and more precise and smaller-sized patterns and larger-sized patterns can be manufactured without loss or caking. In addition, since a desired light-shielding pattern is formed according to the design, a decrease in the uniformity of the image of each product can be prevented, the density of the pattern can be easily controlled, and a decrease in the reliability of the lamp image can be prevented. The upper surface area of the first light-shielding portion 451 can be 5 times or more, for example, 5 to 12 times or 6 to 10 times the upper surface area of the light-emitting device 100. The upper surface area of the first light-shielding portion 451 is the upper surface area of the region formed by a virtual line connecting the outer edges of the patterns of the first light-shielding portion 451. The upper surface area or the lower surface area of the second light-shielding portion 452 can be 5 times or less, 2 to 5 times, or 2 to 3 times the upper surface area of the light-emitting device 100. The upper surface area or the lower surface area of the second light-shielding portion 452 is the upper surface area or the lower surface area of the region within a virtual line connecting the outer edges of the patterns of the second light-shielding portion 452. Here, the lower surface area or the upper surface area of the second light-shielding portion 452 further includes a region overlapping with the third light-shielding portion 453.

[0091] The lower surface area of the third light-shielding portion 453 can be 3 times or less, 1.2 to 3 times, or 1.2 to 2.5 times the upper surface area of the light-emitting device 100. The upper surface area or the lower surface area of the third light-shielding portion 453 is the area of the upper surface or the lower surface of the region within a virtual line connecting the outer edges of the patterns of the third light-shielding portion 453. The upper surface area of the third light-shielding portion 453 further includes a region vertically overlapping with the second light-shielding portion 452. The lower surface area of the second light-shielding portion 452 can be smaller than the upper surface area of the first light-shielding portion 451 and larger than the lower surface area of the third light-shielding portion 453. The first light-shielding portion 451, the second light-shielding portion 452, and the third light-shielding portion 453 can provide a uniform light transmittance, for example, a uniformity of 80% or more, through each pattern or light-shielding region.

[0092] Figure 6 is a plan view of a vehicle to which vehicle lamps 800 and 850 applying a lighting module according to an embodiment are applied, and Figure 7 is a view showing a vehicle lamp having a lighting module or a lighting device disclosed in the embodiment.

[0093] Refer to Figure 6 and Figure 7, the tail lamp 800 in the vehicle 900 may include a first lamp unit 812, a second lamp unit 814, a third lamp unit 816, and a housing 810. Here, the first lamp unit 812 may be a light source for a turn signal, the second lamp unit 814 may be a light source for a clearance lamp, and the third lamp unit 816 may be a light source for a brake lamp, but is not limited thereto. At least one or all of the first lamp unit 812, the second lamp unit 814, and the third lamp unit 816 may include the lighting module disclosed in the embodiments. The housing 810 houses the first lamp unit 812, the second lamp unit 814, and the third lamp unit 816, and may be made of a light-transmitting material. At this time, the housing 810 may be curved according to the design of the vehicle body, and the first lamp unit 812, the second lamp unit 814, and the third lamp unit 816 may implement a surface light source having a curved surface according to the shape of the housing 810. When the lamp unit is applied to the tail lamp, brake lamp, or turn signal lamp of a vehicle, such a vehicle lamp may be applied to the turn signal lamp of the vehicle.

[0094] The features, structures, effects, etc. described in the above embodiments are included in at least one embodiment of the present invention and are not necessarily limited to one embodiment. In addition, the features, structures, effects, etc. shown in each embodiment may be combined or modified by those of ordinary skill in the art to which the embodiments belong for other embodiments. Therefore, the content related to such combinations and modifications should be construed as being included within the scope of the present invention. In addition, although examples have been described above, these are only examples and do not limit the present invention, and those of ordinary skill in the art to which the present invention belongs have been described above without departing from the basic features of this embodiment. It can be seen that various modifications and applications that have not been made are possible. For example, each component specifically shown in the embodiments may be modified and implemented. The differences related to these modifications and applications should be construed as being included within the scope of the present invention defined in the appended claims.

Claims

1. A lighting device, comprising: a substrate; a resin layer disposed on the substrate; a plurality of light-emitting devices sealed in the resin layer and electrically connected to the substrate; an optical film disposed on the resin layer; an adhesive layer disposed between the optical film and the resin layer; and a plurality of light-shielding members including light-shielding patterns disposed on the lower surface of the optical film, and at least a part of the plurality of light-shielding members overlaps with each of the plurality of light-emitting devices in the vertical direction, wherein each of the plurality of light-emitting devices includes a light-emitting surface that emits light toward one side, wherein the upper surface area of each of the plurality of light-shielding members is in the range of 6 to 10 times the upper surface area of each of the plurality of light-emitting devices, and wherein the light uniformity on the optical film is 80% or more.

2. The lighting device according to claim 1, comprising: an air gap portion disposed between each of the plurality of light-shielding members and the resin layer, wherein the lower surface area of the air gap portion is in the range of 6 to 10 times the upper surface area of each of the plurality of light-emitting devices.

3. The lighting device according to claim 1, wherein the distance between adjacent light-shielding members and the light-emitting devices is in the range of 0.15 to 0.55 times the pitch between the light-emitting devices.

4. The lighting device according to any one of claims 1 to 3, wherein the pitch between the light-emitting devices is in the range of 17 mm to 23 mm.

5. The lighting device according to any one of claims 1 to 3, wherein when the upper surface area of each light-shielding member is 8 times the upper surface area of each light-emitting device, the light uniformity is the highest.

6. The lighting device according to claim 4, wherein the pitch between the light-emitting devices is 18 mm ± 1 mm.

7. The lighting device according to any one of claims 1 to 3, wherein the upper surface area of each of the plurality of light-shielding members is 6 to 10 times the area of the light-emitting surface of each of the plurality of light-emitting devices.

8. The lighting device according to any one of claims 1 to 3, wherein each light-emitting device emits light toward a first direction, the length of each light-emitting device in a second direction is greater than the length in the first direction, when the length of each light-emitting device in the second direction is D1 and the length of each light-shielding member in the second direction is C3, the following condition is satisfied: 2 < C3 / D1 < 3.

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