Optical plates, lighting devices, and vehicle lamps

Abstract

The lighting device disclosed in the embodiment includes a substrate, a plurality of light-emitting elements on the substrate, a resin layer covering the light-emitting elements on the substrate, an optical film on the resin layer, and a plurality of light-shielding members disposed on the upper or lower surface of the optical film and overlapping each of the light-emitting elements in a perpendicular direction. The light-shielding members include a first light-shielding portion having a first pattern of a first thickness, a second light-shielding portion having a second pattern of a second thickness greater than the first thickness, and a third light-shielding portion having a third pattern of a third thickness greater than the second thickness, and the first, second, and third light-shielding portions overlap in a perpendicular direction with the upper surface of each of the light-emitting elements. The first pattern of the first light-shielding portion has a larger size around the second and third light-shielding portions than other areas, the second pattern of the second light-shielding portion has a larger size on both sides of the third light-shielding portion than other areas, and the third pattern of the third light-shielding portion may have a single size.

Description

Technical Field

[0001] Embodiments of the invention relate to an optical plate having a light-shielding pattern, a lighting device having the same, and a vehicle lamp. Embodiments of the invention relate to a method of manufacturing a lighting device having a light-shielding pattern.

Background Art

[0002] Applications of lighting include not only vehicle lighting but also backlights for displays and signs. Light-emitting elements, 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 existing light sources such as fluorescent lamps and incandescent lamps. The light-emitting diodes are applied to various lighting devices such as various display devices, interior lights, or exterior lights. Recently, lamps employing light-emitting diodes have been proposed as vehicle light sources. Compared with incandescent lamps, light-emitting diodes are advantageous in that they consume less power. However, since the emission angle of light emitted from the light-emitting diode is small, when using the light-emitting diode as a vehicle lamp, there is a requirement for increasing the light-emitting area of the lamp using the light-emitting diode. Since the light-emitting diode is small in size, the degree of freedom in lamp design can be increased, and there is also economy due to its semi-permanent lifespan.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Embodiments of the invention can provide an optical plate having a light-shielding pattern that shields part of the light emitted from a light-emitting element and a lighting device having the same. Embodiments of the invention can provide an optical plate having a light-shielding pattern formed such that the thicknesses of different regions of the light-shielding pattern are different by an inkjet printing process and a method of manufacturing a lighting device. Embodiments of the invention can provide a lighting device and a vehicle lamp that can improve the uniformity of the pattern of a light-shielding member disposed on a light-emitting element.

Means for Solving the Problems

[0004] The optical plate according to an embodiment of the invention includes an optical film having a diffusing agent and a light-shielding member disposed on the upper surface or the lower surface of the optical film. The light-shielding member includes a first light-shielding portion having a first pattern with a first thickness in a vertical direction, a second light-shielding portion having a second pattern with a second thickness greater than the first thickness, and a third light-shielding portion having a third pattern with a third thickness greater than the second thickness. The first to third light-shielding portions do not overlap with each other in the vertical direction. The first light-shielding portion has the largest pattern among the first patterns arranged around the second and third light-shielding portions. The second light-shielding portion has the largest pattern among the second patterns arranged on both sides in the first direction of the third light-shielding portion. The third light-shielding portion is adjacent to one side of the light-shielding member and has a single-sized third pattern. The upper surface area of the region connecting the outer contour lines of the first pattern of the first light-shielding portion is A1, the upper or lower surface area of the region connecting the outer contour lines of the second pattern of the second light-shielding portion is A2, and the lower surface area of the third light-shielding portion is A3. It can satisfy condition 1: A3 < A2 < A1 and condition 2: 1 < A2 / A3 < 1.7. According to an embodiment of the invention, it can satisfy condition 3: 2 < A1 / A3 < 6. Also, it can satisfy condition 4: 2 < A1 / A2 < 4.5.

[0005] According to an embodiment of the invention, the light-shielding member can include a first edge having a length long in a second direction orthogonal to the first direction, a third edge located on the opposite side of the first edge and having a plurality of first patterns arranged in the second direction, and a second edge having a shape protruding convexly from both ends of the first edge and both ends of the third edge to both sides in the second direction and having the first pattern arranged. According to an embodiment of the invention, it includes a first protrusion and a second protrusion protruding on the second edge and spaced apart from each other, and each of the first protrusion and the second protrusion has the first pattern arranged in the second direction.

[0006] According to an embodiment of the invention, each of the first and second protrusions has six or fewer first patterns arranged in the second direction. According to an embodiment of the invention, the second light-shielding portion includes a rear region located between the first edge of the first light-shielding portion and the third light-shielding portion, corner regions located at both front corners of the third light-shielding portion, and a front region located in front of the third light-shielding portion, wherein the rear region is elongated along one side or rear surface of the third light-shielding portion, and the front region is elongated along the other side or front surface of the third light-shielding portion.

[0007] According to an embodiment of the invention, the outer surface of the second light-shielding portion can be in contact with the first light-shielding portion, and the outer surface of the third light-shielding portion can be in contact with the first and second light-shielding portions. The third thickness is in the range of 2.5 to 5 times the first thickness, and the third thickness can be in the range of 100 μm to 200 μm.

[0008] The lighting device according to an embodiment of the invention includes a substrate, a plurality of light-emitting elements disposed on the substrate and electrically connected to the substrate, a resin layer covering the plurality of light-emitting elements on the substrate, an optical film disposed on the resin layer, and a plurality of light-shielding members disposed on the upper or lower surface of the optical film and at least partially overlapping with each of the plurality of light-emitting elements in the vertical direction. Each of the plurality of light-emitting elements includes a light-emitting surface that emits light in a first direction on one side. Each of the plurality of light-shielding members includes a first light-shielding portion having a first pattern with a first thickness, a second light-shielding portion having a second pattern with a second thickness greater than the first thickness, and a third light-shielding portion having a third pattern with a third thickness greater than the second thickness. The first to third light-shielding portions overlap with the upper surface of the light-emitting element in the vertical direction. The first light-shielding portion has the largest pattern of the first pattern arranged around the second and third light-shielding portions. The second light-shielding portion has the largest pattern of the second pattern arranged on both sides of the third light-shielding portion in the first direction. The third light-shielding portion has a single large-sized third pattern with a length longer than the length in the second direction of each light-emitting element. The upper surface area of each light-emitting element is AO0, the lower surface area of the first light-shielding portion overlapping with the upper surface of each light-emitting element in the vertical direction is AO1, the lower surface area of the second light-shielding portion overlapping with the upper surface of each light-emitting element in the vertical direction is AO2, and the lower surface area of the third light-shielding portion overlapping with the upper surface of each light-emitting element in the vertical direction is AO3. Conditions 1: AO3 < AO2 < AO1 < AO0, Condition 2: 0.1 < A03 / AO0 ≤ 0.2, and Condition 3: 0.2 < A02 / AO0 < 0.3 can be satisfied.

[0009] The lighting device of the invention can satisfy Condition 4: 0.6 < A03 / AO0 < 0.9. The lighting device of the invention can satisfy Condition 5: 5 < A03 / A01 < 9. The lighting device of the invention can satisfy Condition 6: 2 < A03 / A02 < 4.

[0010] According to an embodiment of the invention, the upper surface area of the region connecting the outer contour lines of the first pattern of the first light-shielding portion is A1, and the upper or lower surface area of the region connecting the outer contour lines of the second pattern of the second light-shielding portion is A2, and the conditions 7: 1 < A2 / A03 < 1.7 and condition 8: 2 < A1 / A03 < 6 can be satisfied. The lighting device of the invention can satisfy the condition 9: 2 < A1 / A2 < 4.5.

[0011] According to an embodiment of the invention, the light-shielding member may include a first edge having a length long in a second direction orthogonal to the first direction, a third edge located on the opposite side of the first edge and having a plurality of first patterns arranged in the second direction, and a second edge having the first patterns arranged in a convex shape protruding from both ends of the first edge and both ends of the third edge to both sides in the second direction. According to an embodiment of the invention, the second edge protrudes and includes a first protrusion and a second protrusion spaced apart from each other, and each of the first protrusion and the second protrusion has the first patterns arranged in the second direction.

[0012] According to an embodiment of the invention, each light-emitting element includes first and second light-emitting chips. The optical axis of the first light-emitting chip vertically overlaps with the first protrusion, and the optical axis of the second light-emitting chip vertically overlaps with the second protrusion. Each of the first and second protrusions has six or fewer first patterns arranged in the second direction. According to an embodiment of the invention, the distance from the straight line perpendicular to the light-emitting surface of each light-emitting element in the first direction to the end of the first light-shielding portion is E1, the distance to the end of the second light-shielding portion is E2, and the distance to the end of the third light-shielding portion is E3. The conditions 10: E3 < E2 < E1, condition 11: 1.6 mm < E3 < 2.6 mm, and condition 12: 1 < E2 / E3 < 2 can be satisfied.

[0013] The vehicle lamp according to an embodiment of the invention includes a lamp having the optical plate or lighting device disclosed above, and the lamp may include at least one of a side mirror lamp, a width lamp, a fog lamp, a tail lamp, a brake lamp, a daytime running light, a vehicle interior lighting, a door scuff, a rear combination lamp, and a backup lamp. [Effects of the Invention]

[0014] According to embodiments of the invention, lighting devices and lamps can have improved optical characteristics. Specifically, a light-shielding pattern arranged on a resin layer can prevent hot spots emitted from light-emitting elements, resulting in a uniform light distribution. According to embodiments of the invention, for inkjet printing, a light-shielding material with adjustable density or thickness can be printed according to each nozzle to adjust transmittance, thereby improving the lighting image through increased brightness.

[0015] According to embodiments of the invention, problems such as partial disappearance of light-shielding patterns or aggregation of adjacent patterns can be prevented, thereby improving light uniformity and light-shielding effect. According to embodiments of the invention, the reliability of a lighting device or vehicle lamp having a resin layer covering a light-emitting element molded with a light-emitting chip and a light-shielding pattern on the resin layer can be improved. [Brief explanation of the drawing]

[0016] [Figure 1a] Figure 1a is an example of a plan view of a lighting device according to an embodiment of the invention. [Figure 1b] Figure 1b is an example of a plan view of another lighting device according to an embodiment of the invention. [Figure 2] Figure 2 is a partially enlarged view showing the patterns of the light-shielding members in Figures 1a and 1b. [Figure 3] Figure 3 is a partially enlarged view showing the light-shielding member and light-emitting element shown in Figures 1a and 1b. [Figure 4] Figure 4 is a detailed drawing of the pattern of the light-shielding member shown in Figure 3. [Figure 5] Figure 5 is an example of a cross-sectional view of the lighting device on side AA shown in Figure 1. [Figure 6] Figure 6 is a magnified view of a portion of the lighting device shown in Figure 5. [Figure 7] Figure 7 is an example of a cross-sectional view of the lighting device on the BB side of Figure 1. [Figure 8]FIG. 8 is an example of a C-C side sectional view of the lighting device of FIG. 1. [Figure 9a] (A) of FIG. 9a is an example of forming a pattern of the light shielding member of the invention, and (B) is another example. [Figure 9b] FIG. 9b is an example of forming a pattern of the light shielding member of the comparative example. [Figure 10a] FIG. 10a is an example of a partial plan view of a pattern of a light shielding member according to an embodiment of the invention. [Figure 10b] (A) and (B) of FIG. 10b are drawings showing a mask and a pattern collapse phenomenon for a silk screen process according to a comparative example. [Figure 11] FIG. 11 is an example of a printing system for a light shielding member according to an embodiment of the invention. [Figure 12] FIG. 12 is a drawing showing a pattern of a light shielding member formed using a number of nozzles of the inkjet head of FIG. 11. [Figure 13] FIG. 13 is a flowchart showing a process of forming a light shielding pattern according to an embodiment of the invention. [Figure 14] FIG. 14 is a drawing comparing the luminance distributions of the light shielding patterns of the embodiment and the comparative example of the invention. [Figure 15] FIG. 15 is a drawing showing a substrate on which a light emitting element according to an embodiment of the invention is mounted. [Figure 16] FIG. 16 is a drawing showing a lamp having a lighting device according to an embodiment of the invention. [Figure 17] FIG. 17 is a plan view of a vehicle to which the vehicle lamp of FIG. 16 is applied.

MODE FOR CARRYING OUT THE INVENTION

[0017] Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings.

[0018] The technical concept of the present invention is not limited to the embodiments described herein, but can be embodied in a variety of different forms, and within the scope of the technical concept of the present invention, one or more components between embodiments can be selectively combined and substituted. Furthermore, terms used in the embodiments of the present invention (including technical and scientific terms) can be interpreted as generally understood by a person with ordinary skill in the art to which the present invention belongs, unless they are clearly specifically defined and described, and commonly used terms, such as dictionary-defined terms, can be interpreted considering their meaning in the context of the technology to which they pertain. In addition, the terms used in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the present invention. In this specification, singular forms can also include plural forms unless specifically limited in the description, and when it is written as "at least one (or more) of A and B, C", it can include one or more of all possible combinations of A, B, and C. Furthermore, terms such as first, second, A, B, (a), (b), etc. can be used in the description of the components of the embodiments of the present invention. Such terminology is used to distinguish one component from another, and does not determine the nature or order of the component. When it is stated that a component is "connected," "joined," or "linked" to another component, this can include not only cases where the component is directly connected, joined, or linked to the other component, but also cases where it is "connected," "joined," or "linked" by another component between it and the other component. Furthermore, when it is stated that a component is formed or positioned "above or below" each component, "above" or "below" can include 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. Also, when expressed as "above or below," it can include not only the upward direction but also the downward direction relative to one component.

[0019] The lighting device according to the present invention is applicable to a variety of lamp devices requiring illumination, such as vehicle lamps, household lighting devices, and industrial lighting devices. For example, when applied to vehicle lamps, it can be used for headlamps, side mirror lights, side maker lights, fog lamps, taillights, brake lights, daytime running lights, vehicle interior lighting, door scuffs, rear combination lamps, backup lamps, etc. The lighting device according to the present invention is also applicable to indoor and outdoor advertising devices, display devices, and various electric vehicle fields, and can be said to be applicable to all fields related to lighting that are currently under development and commercialized, or that can be realized through future technological advancements, as well as fields related to advertising.

[0020] Figures 1a and 1b are examples of plan views of a lighting device according to an embodiment of the invention; Figure 2 is a partially enlarged view showing the pattern of the light-shielding member in Figures 1a and 1b; Figure 3 is a partially enlarged view showing the light-shielding member and light-emitting element in Figures 1a and 1b; Figure 4 is a detailed drawing of the pattern of the light-shielding member in Figure 3; Figure 5 is an example of a cross-sectional view of the lighting device in Figure 1 on the AA side; Figure 6 is a partially enlarged view of the lighting device in Figure 5; Figure 7 is an example of a cross-sectional view of the lighting device in Figure 1 on the BB side; and Figure 8 is an example of a cross-sectional view of the lighting device in Figure 1 on the CC side.

[0021] Referring to Figures 1a to 8, the lighting device 400 according to an embodiment of the invention includes a substrate 401, a light-emitting element 100, a resin layer 420, a light-shielding member 450, and an optical film 430. The optical plate includes the optical film 430 and the light-shielding member 450, the light-shielding member 450 being positioned on at least one of the upper and lower surfaces of the optical film 430, for example, on the lower surface of the optical film 430. The lighting device 400 may include a reflective member 410 positioned between the substrate 401 and the resin layer 420. The lighting device 400 can emit light from the light-emitting element 100 as surface light. Alternatively, the lighting device 400 can emit light from the light-emitting element 100 as line light. The lighting device 400 can be defined as a light-emitting cell or a light source module. The lighting device 400 may include one or more light-emitting cells on the substrate 401. The lighting device 400 or the resin layer 420 may include first and second sides S1 and S2 which are on both sides in the second direction Y, and third and fourth sides S3 and S4 which are on both sides in the first direction X. The first and second sides S1 and S2 may face each other and may be on both sides of the substrate 401 and the resin layer 420 in the second direction Y. The third and fourth sides S3 and S4 may face each other and may be on both sides of the substrate 401 and the resin layer 420 in the first direction X. The first direction X may be the optical axis direction of the light-emitting element 100 or the direction in which the plurality of light-emitting elements 100 are arranged. The second direction Y is a direction perpendicular to the first direction X.

[0022] The resin layer 420 can cover the light-emitting element 100. The resin layer 420 can seal the light-emitting element 100. The resin layer 420 can guide the light emitted from each of the multiple light-emitting elements 100 and emit the guided light in a surface light form through the upper surface. The resin layer 420 may be laminated in single or multilayer form using a transparent resin. At least one of the multiple resin layers 420 may contain at least one or all of a diffusing agent, a phosphor, or ink particles. The resin layer 420 can be used as a thin-thickness light guide member by removing a light guide plate made of transparent acrylic (e.g., PMMA) material.

[0023] <Substrate 401> Referring to Figures 1a to 4, the substrate 401 may include a printed circuit board (PCB). The substrate 401 may include at least one of the following: a resin-based printed circuit board (PCB), a PCB with a metal core, a flexible material PCB, a ceramic material PCB, or an FR-4 substrate. If the substrate 401 is a metal core PCB with a metal layer on its bottom surface, the heat dissipation efficiency of the light-emitting element 100 can be improved. The substrate 401 is electrically connected to the light-emitting element 100. The substrate 401 includes a wiring layer (not shown) on top, and the wiring layer is electrically connected to the light-emitting element 100. If multiple light-emitting elements 100 are arranged on the substrate 401, the multiple light-emitting elements 100 may be connected in series, parallel, or series-parallel by the wiring layer. The substrate 401 can function as a base member or support member located below the light-emitting element 100 and the resin layer 420.

[0024] The upper surface of the substrate 401 may be a flat plane or a curved surface. The thickness of the substrate 401 may be the height in the vertical direction or the Z direction. Depending on the shape of the lamp or lighting device 400, the substrate 401 may be a bar shape that is long in one direction, a polygon shape, or a curved shape. The substrate 401 may have a longer length in the first direction X from which light is emitted, or a longer length in the second direction Y perpendicular to the direction from which light is emitted. In the drawing, the X direction may be the first direction, the Y direction may be the second direction, and the Z direction may be perpendicular to the first and second directions. 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. The substrate 401 may include, for example, a reflective layer (not shown). The reflective layer may be an insulating layer protecting a circuit pattern having pads arranged on the substrate 401, or a layer of reflective material.

[0025] <light-emitting element 100> The plurality of light-emitting elements 100 are arranged on the substrate 401 and emit light with the highest luminous intensity in the first direction X. Each of the plurality of light-emitting elements 100 can emit light in the first direction X. Each of the plurality of light-emitting elements 100 is arranged in one or two rows and can emit light from a region adjacent to the third surface S3 toward the fourth surface S4, or emit light from regions adjacent to the third surface S3 and the fourth surface S4 toward each other in opposing directions. As another example, each of the plurality of light-emitting elements 100 can emit light in the second direction Y. As yet another example, as shown in Figure 1b, the plurality of light-emitting elements 100 are arranged along the third and fourth sides S3 and S4 of the substrate 401 and can emit light toward the third and fourth surfaces S3 and S4. Here, the plurality of light-emitting elements 100 may be arranged offset from each other along the third and fourth sides S3 and S4 of the substrate 401 without facing each other.

[0026] The emission surface 81 of the light-emitting element 100 can emit the light with the highest luminous intensity from one side, and the emission surface 81 extends, for example, in a third direction Z or perpendicular to the horizontal upper surface of the substrate 401. The long axis direction of the emission surface 81 may be a second direction Y, and the short axis direction may be a third direction. The emission surface 81 may be a vertical plane, or it may include a concave or convex surface.

[0027] As shown in Figure 15, the light-emitting element 100 is arranged, for example, on the substrate 401 and electrically connected to the pads 403 and 405 of the substrate 401 by conductive bonding members 203 and 205. The conductive bonding members 203 and 205 may be made of solder material or metal material. The light-emitting element 100 is arranged on the substrate 401 in an M × N matrix, where M and N are integers of 2 or more. Each of the light-emitting elements 100 may be an element having a plurality of light-emitting chips 71 and 72, or may include a package in which at least one light-emitting chip is packaged. The light-emitting chips 71 and 72 are molded by a molding member 80. The light-emitting chips 71 and 72 may be arranged in a plurality in a direction orthogonal to the first direction X, and may include, for example, a first light-emitting chip 71 and a second light-emitting chip 72 spaced apart from each other. The emission surface 81 of the light-emitting element 100 may be the surface of the molding member 80. The molding member 80 may be made of a transparent resin material such as silicone or epoxy. The light-emitting chips 71 and 72 can emit at least one of blue, red, green, ultraviolet (UV), and infrared light, and the light-emitting element 100 can emit at least one of white, blue, red, green, and infrared light. Each of the first and second light-emitting chips 71 and 72 can emit the same color or different colors from each other.

[0028] The light-emitting element 100 may be a side-view type in which its bottom portion is electrically connected to the substrate 401, but is not limited thereto. As another example, the light-emitting element 100 may be an LED chip or a top-view package. The emission surface 81 of the light-emitting element 100 may be located on at least one side surface other than the top surface of the light-emitting element 100. The emission surface 81 may be the side surface of the light-emitting element 100 adjacent to the substrate 401, or the side surface perpendicular to the top surface of the substrate 401. The emission surface 81 is located on the side surface between the bottom surface and the top surface of the light-emitting element 100. The emission surface 81 of the light-emitting element 100 may be the surface adjacent to the reflective member 410, or the surface perpendicular to the top surface of the substrate 401 or the top surface of the reflective member 410.

[0029] A portion of the light emitted through the emission surface 81 of the light-emitting element 100 can travel in a direction parallel to the upper surface of the substrate 401, be reflected by the reflective member 410, or travel towards the upper surface of the resin layer 420. The thickness of the light-emitting element 100 can be, for example, 3 mm or less, and in the range of 0.4 mm to 3 mm. Referring to Figure 3, the length D1 of the light-emitting element 100 in the second direction Y is 1.5 times or more greater than the width D2 in the first direction X, and can be 1.5 times or more greater than the thickness of the light-emitting element 100. The light distribution emitted from the light-emitting element 100 in the first direction X has a greater optical directional angle in the ±Y direction than the optical directional angle in the ±Z direction. The optical directional angle of the light-emitting element 100 in the second direction Y can be 110 degrees or more, for example, 120 to 160 degrees or 140 degrees or more. The optical directional angle of the light-emitting element 100 in the third direction Z can be 110 degrees or more, for example, in the range of 120 to 140 degrees.

[0030] <Reflective material 410> The reflective member 410 may be a layer separately bonded to the upper part of the substrate 401, or a layer protecting the upper part of the substrate 401. The reflective member 410 is positioned, for example, between the substrate 401 and the resin layer 420. The reflective member 410 may be provided in the form of a film having a metallic or non-metallic material. The reflective member 410 may be bonded to the upper surface of the substrate 401. The reflective member 410 may have an area smaller than the upper surface area of ​​the substrate 401. The reflective member 410 can be separated from the edge of the substrate 401, and the resin layer 420 is attached to the substrate 401 in the separated area. In this case, it is possible to prevent the edge portion of the reflective member 410 from peeling off. The reflective member 410 may include an opening 417 in which the lower part of the light-emitting element 100 is positioned. The opening 417 of the reflective member 410 has an exposed upper surface of the substrate 401 and a portion in which the lower part of the light-emitting element 100 is bonded. The size of the opening 417 is the same as or larger than the size of the light-emitting element 100, but is not limited thereto. The reflective member 410 may be in contact with the upper surface of the substrate 401 or bonded between the resin layer 420 and the substrate 401, but is not limited thereto. Here, the reflective member 410 may be removed if a highly reflective material is coated on the upper surface of the substrate 401.

[0031] The reflective member 410 may be formed with a thickness thinner than the thickness of the light-emitting element 100. The thickness of the reflective member 410 can be in the range of 0.2 mm ± 0.02 mm. The lower part of the light-emitting element 100 can pass through the opening 417 of such a reflective member 410, and the upper part of the light-emitting element 100 can protrude. The emission surface 81 of the light-emitting element 100 may be provided in a direction perpendicular to the upper surface of the reflective member 410.

[0032] The reflective member 410 may be made of a metallic or non-metallic material. The metallic material may be a metal such as aluminum, silver, or gold. The non-metallic material may be a plastic or resin material. The resin material may have a reflective material, such as a metal oxide such as TiO2, Al2O3, or SiO2, added to silicone or epoxy. The reflective member 410 may be embodied in a single layer or a multilayer structure, and such a layer structure can improve the light reflection efficiency. The reflective member 410 according to the embodiment of the invention can increase the amount of light by reflecting incident light so that the light is emitted with a uniform distribution.

[0033] <Resin layer 420> The resin layer 420 is disposed on the substrate 401. The resin layer 420 may be disposed on the entire upper surface of the substrate 401. As an alternative example, the resin layer 420 may be disposed on a portion of the upper surface of the substrate 401. The resin layer 420 may have a region facing the substrate 401 or bonded to the upper surface of the substrate 401. The lower surface area of ​​the resin layer 420 may be the same as or smaller than the upper surface area of ​​the substrate 401. The resin layer 420 is made of a transparent material and can guide or diffuse light. The resin layer 420 includes a UV (Ultraviolet) curable resin material and can be used in place of a light guide plate, with the convenient effect of adjusting the refractive index and thickness. Since the resin layer 420 is provided as a layer that guides light with resin, it may be provided in a thinner thickness than in the case of glass and may be provided as a flexible plate. The resin layer 420 can emit a point light source emitted from the light-emitting element 100 in the form of line light or surface light.

[0034] The resin layer 420 may contain beads (not shown), which can increase the amount of light by diffusing and reflecting incident light. The beads may be arranged in an amount of 0.01 to 0.3% by weight of the resin layer 420. The beads can be made of any one of the following: silicone, silica, glass bubble, PMMA (polymethyl methacrylate), urethane, Zn, Zr, Al2O3, or 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.

[0035] The thickness of the resin layer 420 can 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 greater than the range, the luminous intensity decreases, and it becomes difficult to provide it as a flexible module due to the increased module thickness. If the thickness of the resin layer 420 is less than the range, it becomes difficult to provide a surface light source with uniform luminous intensity.

[0036] The resin layer 420 seals the plurality of light-emitting elements 100, thereby protecting each of the light-emitting elements 100 and reducing the loss of light emitted from each of them. The upper part of each light-emitting element 100 may be embedded in the lower part of the resin layer 420. The resin layer 420 can contact the surface of the light-emitting elements 100 and can contact the emission surface 81 of the light-emitting elements 100. The resin layer 420 can contact the upper and side surfaces of the light-emitting elements 100, or the emission surface 81 and the non-emission surface. A portion of the resin layer 420 may be placed in the opening 417 of the reflective member 410.

[0037] <Transparent layer 415> The light-transmitting layer 415 may be an adhesive material such as silicone or epoxy, or it may include a diffusion material. The diffusion material may include at least one of polyester (PET), PMMA (Poly Methyl Methacrylate), or PC (Poly Carbonate). The light-transmitting layer 415 may be bonded to the upper surface of the resin layer 420. The light-transmitting layer 415 can allow the optical film 430 to adhere closely to the upper surface of the resin layer 420. The inner region of the light-transmitting layer 415 may include the light-shielding member 450 and the air gap portion 427. The thickness of the light-transmitting layer 415 may be the same as the maximum thickness of the light-shielding member 450, or it may be thicker than the thickness of the light-shielding member 450. The air gap portion 427 is positioned between the light-transmitting layer 415 and the light-shielding member 450, respectively. The air gap portion 427 may extend further between the light-shielding member 450 and the resin layer 420. Therefore, the lower surface area of ​​the air gap portion 427 can be larger than the upper surface area of ​​the light-shielding member 450. The air gap portion 427 can perform a light-shielding function below and around the light-shielding member 450.

[0038] <Light-shielding material 450> Multiple light-shielding members 450 may be arranged in a first direction X. Each of the multiple light-shielding members 450 may face a portion of the upper surface of the resin layer 420. A portion of each light-shielding member 450 may overlap each of the multiple light-emitting elements 100 in a perpendicular direction or in a third direction Z. Each of the multiple light-shielding members 450 may overlap each of the emission surfaces 81 of the multiple light-emitting elements 100 in a perpendicular direction. The light-shielding members 450 are positioned between the resin layer 420 and the optical film 430. The light-shielding members 450 may have a light-shielding pattern and be formed on the lower surface of the optical film 430. That is, the light-shielding members 450 may be integrally formed on the lower surface of the optical film 430. The optical film 430 may include the light-shielding members 450. As another example, the light-shielding members 450 may have a light-shielding pattern and be formed on the upper surface of the optical film 430. The light-shielding member 450 may have a light-shielding pattern and be formed on the upper surface of the resin layer 420. In another example, if a plurality of optical films 430 are arranged, the light-shielding member 450 may be placed between the plurality of optical films and formed on the upper surface of the lower optical film or the lower surface of the upper optical film.

[0039] The light-shielding member 450 may be placed within the light-transmitting layer 415. The light-shielding member 450 may penetrate the light-transmitting layer 415 and be in contact with at least one of the resin layer 420 and the optical film 430. The light-shielding member 450 may not be in contact with the light-transmitting layer 415. The area inside the light-transmitting layer 415 and / or separated from the upper surface of the resin layer 420 may be defined as an air gap 427. The air gap 427 can provide a refractive index different from that of the light-shielding member 450 and the light-transmitting layer 415, thereby improving light diffusion efficiency. The lower surface of the light-shielding member 450 may be separated from or not in contact with the upper surface of a lower layer, for example, the upper surface of the resin layer 420. The air gap 427 may be a vacuum region. The spacing B1 between adjacent light-shielding members 450 may be smaller than the spacing X1 between adjacent light-emitting elements 100. Each light-shielding member 450 can be separated from the outer surface of the resin layer 420. Multiple light-shielding members 450 have the same shape as each other and are arranged on each light-emitting element 100. Each light-shielding member 450 may be arranged in a region perpendicular to each light-emitting element 100 and in its surrounding region.

[0040] The light-shielding member 450 may be an area printed with a white material. The light-shielding member 450 may consist of a light-shielding material having at least one diffusing agent, such as TiO2, Al2O3, CaCO3, BaSO4, or Silicon, within the resin material. The light-shielding member 450 can reflect light emitted through the emission surface 81 of the light-emitting element 100, thereby reducing the occurrence of hot spots on the light-emitting element 100. The light-shielding member 450 can have a light-shielding pattern printed using the light-shielding material. The light-shielding member 450 may be formed in such a way that it is printed on the lower surface of the optical film 430. The light-shielding member 450 is made of a material that does not block 100% of incident light, has a transmittance lower than its reflectance, and can function to shield and diffuse light. The light-shielding member 450 may have a transmittance of less than 12%, for example, in the range of 6% to 11%. If the transmittance of the light-shielding member 450 is less than the range, dark areas may occur, and if it is greater than the range, the light uniformity may decrease.

[0041] The light-shielding member 450 may be formed in a single layer or multiple layers, and the pattern of the light-shielding member 450 may have different shapes depending on the region. The thickness of the light-shielding member 450 may have different thicknesses depending on the region. The thickness of the light-shielding member 450 may be thickest in the region overlapping with the emission surface 81 of each light-emitting element 100, and thinnest in the edge region. In terms of the thickness of the light-shielding member 450, the region closer to the emission surface 81 of the light-emitting element 100 may be thicker, and the region closer to the edge than the emission surface 81 may be thinner. Of the regions of the light-shielding member 450, the region closer to the emission surface 81 is the inner region, and the region closer to the edge is the outer region. The smallest pattern of the light-shielding member 450 may be a polygonal shape such as a square, a circle, or an ellipse. The largest pattern of the light-shielding member 450 may have a shape that has a lower surface area larger than the upper surface area of ​​the light-emitting element 100.

[0042] The light-shielding member 450 may be positioned higher than the upper surface of the resin layer 420. The light-shielding member 450 may consist of at least two layers in thickness or height relative to the optical film 430, and may consist of, for example, at least three layers.

[0043] As shown in Figures 5 to 8, the maximum thickness of the light-shielding member 450 can be 35 μm or more, for example, in the range of 35 μm to 200 μm. If the maximum thickness of the light-shielding member 450 is less than 35 μm, the light incident from the bottom of the light-shielding member 450 cannot be effectively blocked or the transmittance increases, resulting in an uneven light distribution on the light-shielding member 450. Also, if the maximum thickness of the light-shielding member 450 exceeds 200 μm, although the formation of hot spots by light emitted from the light-emitting element 100 can be effectively controlled, the light emitted from the light-emitting element 100 may be lost in the process of passing through the light-shielding member 450, resulting in a decrease in overall brightness. Therefore, it is preferable that the thickness of the light-shielding member 450 satisfies the above range.

[0044] Referring to Figure 6, the minimum thickness T1 of the light-shielding member 450 is 35 μm or more, and can satisfy, for example, 35 μm ≤ T1 ≤ 50 μm, preferably 35 μm ≤ T1 ≤ 45 μm. If the first thickness T1 of the light-shielding member 450 is smaller than the above range, the light uniformity will decrease, falling outside the range of transmittance disclosed above, and if it is larger than the above range, the transmittance will fall below the range of transmittance disclosed above, and dark areas may occur. The maximum thickness T3 of the light-shielding member 450 is 100 μm or more, and can satisfy, for example, 100 μm ≤ T3 ≤ 200 μm, preferably 110 μm ≤ T3 ≤ 150 μm or 110 μm ≤ T3 ≤ 130 μm. If the third thickness T3 of the light-shielding member 450 is smaller than the range, the light uniformity will decrease, falling outside the range of transmittance disclosed above. If it is larger than the range, the transmittance may fall below the range of transmittance disclosed above, potentially causing dark areas. The light-shielding member 450 may include a region having a second thickness T2. The second thickness T2 is greater than the first thickness T1 and less than the third thickness T3. The second thickness T2 is a thickness between the first thickness T1 and the third thickness T3, and is 70 μm or more, and can satisfy, for example, 70 μm ≤ T2 ≤ 140 μm, preferably 70 μm ≤ T2 ≤ 110 μm or 75 μm ≤ T2 ≤ 100 μm. If the second thickness T2 of the light-shielding member 450 is smaller than the range, the light uniformity will decrease, falling outside the range of transmittance disclosed above. If it is larger than the range, the transmittance may fall below the range of transmittance disclosed above, potentially causing dark areas. The third thickness T3 is greater than the sum of the first thickness T1 and the second thickness T2, and can be in the range of 130% to 170% of the sum of the first thickness T1 and the second thickness T2.

[0045] The light-shielding member 450 can 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 to third light-shielding portions 451, 452, 453 can include the light-shielding material. The first light-shielding portion 451 has a first thickness T1 or a first height, the second light-shielding portion 452 has a second thickness T2 or a second height, and the third light-shielding portion 453 can have a third thickness T3 or a third height. The first to third thicknesses T1, T2, T3 can satisfy the condition: T1 < T2 < T3 when based on the optical film 430.

[0046] As shown in Figure 9a(A), the light-shielding member 450 can be formed on the optical film 430 with different thicknesses for each layer by an inkjet printing process. For example, the first light-shielding portion 451 of the light-shielding member 450 may have a first thickness T1, the second light-shielding portion 452 may be formed with a second thickness T2 which is thicker than the first thickness T1, and the third light-shielding portion 453 may be formed with a third thickness T3 which is thicker than the second thickness T2. Here, the first to third light-shielding portions 451, 452, and 453 may be formed in any order, for example, in the order of first to third light-shielding portions 451, 452, and 453. As another example, the light-shielding member 450 may be formed in the order of third light-shielding portion 453, second light-shielding portion 452 and first light-shielding portion 451, or in the order of second light-shielding portion 452, third light-shielding portion 453 and first light-shielding portion 451, or in the order of third light-shielding portion 453, first light-shielding portion 451 and second light-shielding portion 452. Such a process allows for the formation of different thicknesses according to each light-shielding portion 451, 452, and 453, and the curing time can be reduced. Furthermore, by forming each layer with a different thickness, problems such as collapse of interlayer boundaries and uneven spacing between patterns in each region can be prevented. For example, the method for forming the light-shielding member 450 is as shown in Figures 12(A) and (B): a first light-shielding portion 451 having a first thickness T1 is formed on the optical film 430 by inkjet printing; a second light-shielding portion 452 having a second thickness T2 is formed by inkjet printing; and a third light-shielding portion 453 having a third thickness T3 is formed by inkjet printing. The second light-shielding portion 452 may be formed within the area of ​​the first light-shielding portion 451. The third light-shielding portion 453 may be arranged within the areas of the first and second light-shielding portions 451 and 452. In this method, nozzles 601, 602, and 603 corresponding to the first to third light-shielding portions 451, 452, and 453 are used, respectively, to form each portion through a dispensing process in an amount corresponding to the thickness of each light-shielding portion 451, 452, and 453, and then cured using an ultraviolet curing machine 610. The first to third light-shielding portions 451, 452, and 453 do not necessarily have to overlap each other in the vertical direction. The patterns of the first to third light-shielding portions 451, 452, and 453 may be formed without rounding at the upper edge or upper peripheral portion.Such a light-shielding member can improve the uniformity of the patterns of each light-shielding portion and improve the luminance and luminous flux.

[0047] As shown in (B) of FIG. 9a, the light-shielding member 450 can be formed with the same or similar thickness for each layer by an inkjet printing process. For example, the first, second, and third light-shielding portions 451A, 452A, and 453A of the light-shielding member 450 can have the same thickness as each other or a thickness having a difference of 10% or less from each other. At this time, the first light-shielding portion 451A is formed on the surface of the optical film 430, the second light-shielding portion 452A is formed on the first light-shielding portion 451A, and the third light-shielding portion 453A is formed on the second light-shielding portion 452A. To explain again, after printing and curing the first light-shielding portion 451A having the first thickness h1 or the first height by an inkjet method, the second light-shielding portion 452A is formed on a partial region of the first light-shielding portion 451A and cured. At this time, the thickness of the second light-shielding portion 452A is formed to be the same as the thickness of the first light-shielding portion 451A or to have a difference of 10% or less. Such a method is to use the nozzles corresponding to the first light-shielding portion 451A to form it primarily, and then reuse the nozzles to form the second light-shielding portion 452A in a partial region of the first light-shielding portion 451A and cure it with an ultraviolet curing machine, and then reuse the nozzles to form the third light-shielding portion 453A in a partial region of the second light-shielding portion 452A and cure it with an ultraviolet curing machine. That is, the nozzles are repeatedly moved and printed by an inkjet method so that the thicknesses of each light-shielding portion are formed. Such a structure can satisfy the condition that the first light-shielding portion 451A, the second light-shielding portion 452A, and the third light-shielding portion 453A are formed in respective layers, and the thicknesses h1, h2, h3 or the upper surface heights of each layer are different from each other, and h1 < h2 < h3. Here, h1 may be in the same range as T1, h2 may be in the same range as T2, and h3 may be in the same range as T3. Such a method for forming the light-shielding member can be selected from the above two methods by adjusting the nozzles.

[0048] The light-shielding member 450 according to an embodiment of the invention may include light-shielding portions having different thicknesses in different regions. The light-shielding portions 451, 452, and 453 of the light-shielding member 450, having different thicknesses, may be made of the same material. In the light-shielding member 450, the third thickness T3 of the third pattern P3 may be 2.5 times or more the first thickness T1 of the first pattern P1, for example, in the range of 2.5 to 5 times, preferably in the range of 2.5 to 3.5 times or 2.8 to 3.2 times. If the difference in thickness between the first and third patterns P1 and P3 of the light-shielding member 450 is smaller than the above range, the light-shielding effect on light with high luminosity will be minimal, and if it is larger than the above range, the light loss will be large. By arranging a thicker pattern in the region where the luminosity of the incident light is high and a thinner pattern in the region where the luminosity of the incident light is low, the light-shielding effect and light uniformity can be improved.

[0049] The maximum area of ​​the region formed by the virtual lines connecting the outer patterns of the light-shielding member 450 can be five times or more the upper surface area of ​​the light-emitting element 100, for example, in the range of 5 to 12 times or 6 to 10 times. The maximum area of ​​the region formed by the virtual lines connecting the outer patterns of the light-shielding member 450 may also be the upper surface area of ​​the light-shielding member 450. The upper surface area of ​​the light-shielding member 450 may also be the area of ​​the region connecting the outer outlines of the first pattern of the first layer. The lower surface area of ​​the light-shielding member 450 may be the area of ​​the region connecting the outer outlines of the third pattern P3 of the third light-shielding part 453, or it may be the minimum area. The lower surface area of ​​each light-shielding member 450 can be one time or more the upper surface area of ​​the light-emitting element 100, for example, in the range of 1 to 2.5 times or 1.5 to 2.5 times. This reduces the problem of the light-emitting element 100 being visible from the outside, reduces hot spots on the area of ​​the light-emitting element 100, and provides a uniform light distribution across the entire area.

[0050] Each of the plurality of light-shielding members 450 may include a first edge 461, a second edge 462, and a third edge 463 along the outer outline of the pattern. The first edge 461 is at least a portion of a region adjacent to or perpendicularly overlapping the light-emitting element 100, the third edge 463 is the region opposite to the first edge 461, and the second edge 462 may have a biconvex shape as both sides of the second direction Y of each light-shielding member 450. The first edge 461 has a virtual linear shape, and the third edge 463 has a virtual linear shape and may have a linear length longer than the linear length of the first edge 461.

[0051] The convex shape of the second edge 462 of the light-shielding member 450 may protrude outward or toward the second side surface S3 in the region between one end of the first edge 461 and one end of the third edge 463, and may protrude outward or toward the first side surface S1 in the region between the other end of the first edge 461 and the other end of the third edge 463. The length C1 of the first edge 461 of the light-shielding member 450 in the second direction Y is smaller than the length C2 of the third edge 463 in the second direction Y, and the maximum length C3 between both second edges 462 may be longer than the length C2 of the third edge 463. Here, the length of both second edges 462 in the second direction Y may gradually increase from both ends of the first edge 461 toward the center of the second edge 462, and gradually decrease from the center of the second edge 462 toward both ends of the third edge 463.

[0052] The length C1 of the first edge 461 of the light-shielding member 450 is set to be 0.8 mm or more greater than the length D1 of the light-emitting element 100, so that both sides of the light-emitting element 100's emission surface can be covered, and hot spots caused by light emitted from the light-emitting element 100 can be prevented. The ratio of the length D1 of the light-emitting element 100 to the length of the light-shielding member 450 is as follows.

[0053] Condition 1:1 <C1 / D1<1.5 Condition 2:1.3 <C2 / D1<1.8 Condition 3:2 <C3 / D1<3 Under Conditions 1 and 2, the condition C1 / D1 < D2 / D1 is satisfied. When at least one of Conditions 1 to 3 is satisfied, the light uniformity in the light shielding member 450 and its periphery can be improved. When it is smaller than the said range, hot spots may occur or the light uniformity may decrease. When it is larger than the said range, there may be light loss or dark parts.

[0054] The maximum length C3 of the light shielding member 450 in the second direction Y varies depending on the length D1 of the light emitting element 100 in the second direction Y. The maximum length C3 can be 9 mm or more, for example, in the range of 9 mm to 20 mm or in the range of 10 mm to 18 mm. The maximum length B3 of the light shielding member 450 in the first direction X may be the same as or smaller 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 can be 7 mm or more, for example, in the range of 7 mm to 13 mm. With such a length of the light shielding member 450, the upper part, front, and both sides of the light emitting surface 81 of the light emitting element 100 can be covered, preventing hot spots caused by the light emitted from the light emitting element 100 and improving the light uniformity.

[0055] The length of the light emitting element 100 in the first direction X is D2, and the ratio with the maximum length B3 of the light shielding member 450 in the first direction X can satisfy the following conditions.

[0056] Condition: 3 < B3 / D2 < 7 or 4 ≤ B3 / D2 ≤ 6 When the above conditions are satisfied, the light uniformity in the light shielding member 450 and its periphery can be improved. When it is smaller than the said range, hot spots may occur or the light uniformity may decrease. When it is larger than the said range, there may be light loss or dark parts.

[0057] The third edge 463 of the light-shielding member 450 may include protrusions 465 and 466 that protrude beyond a virtual straight line. The protrusions 465 and 466 may include a first protrusion 465 and a second protrusion 466 that are spaced apart in the second direction Y. The first protrusion 465 may include six or fewer patterns, for example, two to six, arranged parallel to the long axis direction of the emission surface 81 of the light-emitting element 100, and may be a region that overlaps perpendicularly with the optical axis of the first light-emitting chip 71. Here, the optical axis of the first light-emitting chip 71 is the emission-side axis direction perpendicular to the center of the first light-emitting chip 71. The first protrusion 465 can shield light with high luminous intensity emitted from the center of the first light-emitting chip 71. The long axis direction of the emission surface 81 is the second direction Y.

[0058] The second protrusion 466 includes two or more patterns, for example, two to six, arranged parallel to the emission surface 81 of the light-emitting element 100, and may be a region that overlaps perpendicularly with the optical axis of the second light-emitting chip 72. Here, the optical axis of the second light-emitting chip 72 is the emission-side axis direction perpendicular to the center of the second light-emitting chip 72. The second protrusion 466 can block light with high intensity emitted from the center of the second light-emitting chip 72. As a result, the first and second protrusions 465 and 466 are positioned on a region perpendicular to the optical axes of the first and second light-emitting chips 71 and 72, and can block high-intensity light depending on the directional angle of the first and second light-emitting chips 71 and 72, thereby preventing hot spots on the third edge 463 of the light-shielding portion 450.

[0059] <Optical film 430> The optical film 430 is disposed on the resin layer 420. The light-transmitting layer 415 and the light-shielding member 450 are disposed on the lower surface of the optical film 430. The light-shielding member 450 may be printed on the lower part of the optical film 430 and fixed on the resin layer 420 via the light-transmitting layer 415. The optical film 430 may include at least one of polyester (PET) film, PMMA (Poly Methyl Methacrylate) material, or PC (Poly Carbonate). The optical film 430 may be provided as a film of a resin material such as silicone or epoxy. The optical film 430 may include a single layer or a multilayer. As another example, if a lower optical film (not shown) is disposed between the light-transmitting layer 415 and the resin layer 420, the lower optical film may be bonded to the resin layer 420 by a first adhesive force having fine cilia on the upper surface of the resin layer 420. 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.

[0060] The thickness of the optical film 430 is 25 μm or more, and can be in the range of 25 μm to 250 μm or 100 μm to 250 μm. Such an optical film 430 has the aforementioned thickness range and can provide incident light as a uniform surface light source. The optical film 430 and / or the lower optical film may contain at least one or more of the following: a diffusing agent such as beads, a phosphor, and ink particles. The phosphor may include at least one of the following: 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 the following: a metallic ink, a UV ink, or a curing ink. The size of the ink particles may be smaller than the size of the phosphor. The surface color of the ink particles may be any one of green, red, yellow, or blue. The ink type can be selectively applied from PVC (Poly vinyl chloride) ink, PC (Polycarbonate) ink, ABS (acrylonitrile butadiene styrene copolymer) ink, UV resin ink, epoxy ink, silicone ink, PP (polypropylene) ink, water-based ink, plastic ink, PMMA (poly methyl methacrylate) ink, and PS (Polystyrene) ink. The ink particles may contain at least one of metal ink, UV ink, or curing ink.

[0061] In one embodiment of the invention, light diffused by the resin layer 420 is transmitted through the light-transmitting layer 415 and emitted as uniform surface light through the optical film 430. In this case, the light-shielding member 450 can prevent hot spots caused by incident light. In another embodiment of the invention, a layer of reflective material or an upper substrate is placed on top of the resin layer 420. The layer of reflective material or upper substrate can face the upper surface of the resin layer 420, the light-emitting element 100 is arranged in at least one row or column, and each emission surface 81 of the light-emitting element 100 is spaced such that it is on one side of the resin layer 420, and light can be emitted through one side of the resin layer 420.

[0062] The light-shielding member 450 according to the embodiment of the invention may be formed, for example, on the surface of an optical film 430 having a diffusing agent by an inkjet printing method. Unlike the silkscreen method which uses a separate mask mesh, the inkjet printing method allows for the formation of different thicknesses in different areas through nozzles. When the light-shielding pattern of the light-shielding member is formed by the existing silkscreen method, the required shape of the light-shielding pattern, for example, the shape of some patterns, may not be able to maintain a rectangular shape and may be formed in an irregular shape. Such differences in shape can lead to differences in the uniformity of the image from product to product, potentially reducing the optical reliability of the lighting device. In addition, in existing methods, if the size of some patterns is small, the emulsion film applied on the mask mesh may clog, causing the printed pattern to disappear. Also, in existing methods, if the size of some patterns is large, the emulsion collapses on the mask mesh, causing aggregation between patterns (see (B) in Figure 10b). This aggregation makes it difficult to adjust the density of the light-shielding pattern, limiting the improvement of the lamp image. Furthermore, as shown in Figure 9b, in the comparative example, when the light-shielding patterns are laminated in multilayers L1, L2, and L3, they are repeatedly formed using different masks. In this case, the edges of the upper side surfaces of the patterns in each layer L1, L2, and L3 are treated as curved surfaces L1R1, L2R1, and L3R1, respectively. This can lead to a decrease in the area of ​​each pattern when forming the second and third layers L2 and L3. As a result, the lower pattern area of ​​each layer L1, L2, and L3 may become larger, or the light-shielding effect may decrease on the outer curved surfaces L1R1, L2R1, and L3R1 of the light-shielding patterns. In addition, because the comparative example uses masks, the thickness within each layer is the same, making it difficult to provide diverse pattern thicknesses for each layer, and also making it difficult to adjust the density in different regions.

[0063] In this embodiment of the invention, a light-shielding pattern is formed using an inkjet printing method, thereby eliminating the need for the mask and emulsion previously used. This allows for the production of more precise, smaller, and larger patterns without loss or aggregation. Furthermore, since the desired light-shielding pattern is formed according to the design, a decrease in image uniformity between products can be prevented, the pattern density can be easily adjusted, and a decrease in the reliability of the lamp image can be prevented. In this embodiment of the invention, when forming a light-shielding pattern using an inkjet printing method, the density of each light-shielding area can be adjusted using a nozzle, providing a pattern optimized for the shape of the lighting lamp. In addition, the pattern size and density of the light-shielding area can be adjusted using an inkjet printing method to maximize the control of hot spots on the light-emitting surface of the light-emitting element and the light diffusion (light guiding) effect to the next light-emitting element.

[0064] As shown in Figures 3 to 5, in the light-shielding member 450, the first light-shielding portion 451 may include a first region R1 having a dense first pattern P1 on the light-emitting surface 81 of the light-emitting element 100, and a second region R2 having a sparser first pattern P1 than the pattern of the first region R1. Here, the gaps G1 and G2 between the first patterns P1 in the first region R1 may be 1 mm or less, and the gaps G1 and G2 between the first patterns P1 in the second region R2 may exceed 1 mm. The first light-shielding portion 451 has the largest pattern of the first patterns P1 arranged around the second and third light-shielding portions 452 and 453. That is, the first pattern P1 of the first light-shielding portion 451 may have the largest pattern in size or area around the second and third light-shielding portions 452 and 453. In the light-shielding member 450, the first light-shielding portion 451 is provided as a dot-shaped pattern in Figures 3 and 4. The length C6 of the first region R1 of the first light-shielding portion 451 in the second direction Y can be 1.2 times or more the length D1 of the second direction Y of the light-emitting element 100, for example, in the range of 1.2 to 2 times or 1.4 to 1.8 times. That is, the first region R1 having a dense pattern covers the upper part of the light-emitting surface 81 of the light-emitting element 100, so that the distribution of light traveling to the optical film 430 through the first light-shielding portion 451 can be improved.

[0065] Since the first region R1 of the first light-shielding portion 451 is further positioned on both sides of the second light-shielding portion 452 or the third light-shielding portion 453 in the first direction X and on both sides of the second direction Y, the difference in luminosity due to the difference in thickness of the light-shielding portions 451, 452, and 453 can be reduced.

[0066] The first region R1 may include a first rear region R11 having a dense pattern, side regions R12 and R13, and first front regions R14 and R15. Here, the references for front, side, and rear may be the third light-shielding portion 453. The first rear region R11 is positioned rearward or on one side with respect to the region overlapping with the emission surface 81 of the light-emitting element 100, and the first front regions R14 and R15 are positioned in front or on the other side with respect to the region overlapping with the emission surface 81 of the light-emitting element 100. Thus, the first rear region R11 may be one side region of the third light-shielding portion 453 or one side region with respect to the region overlapping with the emission surface 81. Thus, the first rear region R11 may be one side region of the third light-shielding portion 453, and the first front regions R14 and R15 may be the other side region of the third light-shielding portion 453. The first forward regions R14 and R15 can be divided into a narrow region and a wide region as one of the gaps G1 and G2 in the first and second directions increases from the second light-shielding portion 452 toward the third edge 463. Here, the narrow region is the region adjacent to the third light-shielding portion 453 and can have narrower gaps G1 and G2 than the gaps G1 and G2 of the wide region.

[0067] The size of each first pattern P1 in the first region R1 of the first light-shielding portion 451 may be larger than the size or area of ​​each first pattern P1 in the second region R2. The gaps G1 and G2 between the first patterns P1 in the first region R1 may be larger than the gaps G1 and G2 between the first patterns P1 in the second region R2. The gaps G1 and G2 may include a gap G1 that separates in the second direction Y and a gap G2 that separates in the first direction X. The gaps G1 and G2 between the first patterns P1 in the first and second regions R1 and R2 of the first light-shielding portion 451 can gradually increase as the distance from the light-emitting surface 81 of the light-emitting element 100 increases. The size or area of ​​each first pattern P1 in the first region R1 can gradually decrease as the distance from the light-emitting surface 81 of the light-emitting element 100 increases. The aforementioned shape that gradually decreases in size or gradually increases in size may include a pattern in which M rows or / or N columns (where M and N are 1 to 4) are of the same size, and the pattern beyond that is either decreasing in size or increasing in size.

[0068] In the light-shielding member 450, the second light-shielding portion 452 is provided as a region in the form of a thin solid line (see Figures 3 and 4) and is positioned on both sides of the third light-shielding portion 453 in the first direction X. The length B4 of the second light-shielding portion 452 in the first direction X may be greater than the length B5 of the third light-shielding portion 453. The length B4 of the second light-shielding portion 452 is the distance between the two ends of the second light-shielding portion 452 in the first direction X, and since the second light-shielding portion 452 is positioned between the first region R1 having a dense pattern and the third light-shielding portion 453, the light-shielding effect can be gradually reduced. The length of the second light-shielding portion 452 in the second direction Y may be the same as, or greater than, the maximum length C4 of the third light-shielding portion 453, for example, they may be the same. In the second direction Y, the length of the second light-shielding portion 452 (e.g., C4) can be 1.1 times or more the length D1 of the light-emitting element 100, for example, in the range of 1.1 to 1.5 times or 1.1 to 1.4 times. The length C4 of the second light-shielding portion 452 in the second direction Y is formed to be large enough to cover the large directional angle of the light-emitting element 100 in the second direction Y.

[0069] Furthermore, since the luminous intensity of light traveling on both sides in the second direction Y with respect to the light-emitting element 100 is 50% or more less than the luminous intensity in the first direction X, even if the length C4 of the second light-shielding portion 452 and the third light-shielding portion 453 in the second direction Y is set to be the same, a decrease in light-shielding efficiency can be prevented.

[0070] The second light-shielding portion 452 has the largest size or area of ​​the second pattern P2 arranged on both sides of the third light-shielding portion 453 in the first direction. The second pattern P2 of the second light-shielding portion 452 can have a larger size or area on both sides of the third light-shielding portion 453 than other areas. The second light-shielding portion 452 may include a second rear region R50, both corner regions R51 and R52, and second front regions R53 and R54. The second rear region R50 is arranged rearward or on one side with respect to the region overlapping with the emission surface 81 of the light-emitting element 100, and the second front regions R53 and R54 are arranged in front or on the other side with respect to the region overlapping with the emission surface 81 of the light-emitting element 100. Thus, the second rear region R50 may be one side region of the third light-shielding portion 453 or one side region with respect to the region overlapping with the emission surface 81. As a result, the first rear region R50 is located in one side region of the third light-shielding portion 453, and the second front regions R53 and R54 are located in the other side region of the third light-shielding portion 453. The second rear region R50 is positioned between the first rear region R11 and one side of the third light-shielding portion 453, and the two corner regions R51 and R52 are positioned at the front corners of the third light-shielding portion 453, respectively. The second front regions R53 and R54 are positioned between the other side of the third light-shielding portion 453 and the first front regions R14 and R15. The second front regions R53 and R54 can be divided into a narrow region and a wide region as you move from the second light-shielding portion 452 toward the third edge 463, with at least one of the gaps G1 and G2 in the first and second directions being narrower. Here, the narrow region is the region adjacent to the third light-shielding portion 453, and can have narrower gaps G1 and G2 than the gaps G1 and G2 of the wider region.

[0071] The length C5 in the second direction Y of the second front regions R53 and R54 may be the same as the length of the third light-shielding portion 453. The second rear region R50 is long along one side or rear surface of the third light-shielding portion 453, and the second front regions R53 and R54 are long along the other side or front surface of the third light-shielding portion 453. The second pattern P2 of the second light-shielding portion 452 may be arranged one or more times depending on the region. For example, the second pattern P2 inside the second rear region R50 and the second front region (R53) may be single or formed to be the largest size within the second light-shielding portion 452, and the second pattern P2 outside the second front region (R54) may be formed multiple times along the second direction Y. As shown in Figure 6, Figures 3, 4, and 8, the length of the second light-shielding portion 452 in the second direction Y may be the length outside the second front region (R54), and can be 80% or more of the length of the second direction Y of the second rear region R50, for example, in the range of 80% to 99%.

[0072] The second rear region R50 can come into contact with the first light-shielding portion 451. The second rear region R50 can come into contact with the first rear region R11 of the first light-shielding portion 451. Both sides of the third light-shielding portion 453 can come into contact with the first light-shielding portion 451, and one side and the other side can come into contact with the second light-shielding portion 452. The outer surface of the second light-shielding portion 452 can come into contact with the first and third light-shielding portions 451 and 453.

[0073] The third light-shielding portion 453 may have the largest of the first to third patterns P1, P2, and P3, namely the third pattern P3. The third pattern P3 may be formed as a single pattern. The third light-shielding portion 453 may include side-projecting regions R32, R33 and a front-projecting region R31. The side-projecting regions R32, R33 and the front-projecting region R31 are connected to each other. As shown in Figures 3, 4, and 7, the length C4 of the third light-shielding portion 453 in the second direction Y may be the distance between the side-projecting regions R32, R33, which is the same as the length of the second rear region R50, or the maximum distance between the two corner regions R51, R52, or may be greater than the length of the front-projecting region R31 (e.g., C5). That is, the length of the third light-shielding portion 453 in the second direction may be greater on the inside adjacent to the light-emitting surface 81 of the light-emitting element 100 than on the outside. Here, the inner and outer reference points may be the light-emitting surface 81 of the light-emitting element 100. The light-emitting surface 81 of the light-emitting element 100 can overlap perpendicularly with the second and third light-shielding portions 452 and 453. The light-emitting surface 81 of the light-emitting element 100 can overlap perpendicularly with a light-shielding pattern having a third thickness T3.

[0074] The upper surface area of ​​the first light-shielding portion 451 can be five times or more the upper surface area of ​​the light-emitting element 100, for example, in the range of 5 to 12 times or 6 to 10 times. 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 first pattern P1. The upper or lower surface area of ​​the second light-shielding portion 452 can be five times or less the upper surface area of ​​the light-emitting element 100, in the range of 2 to 5 times or 2 to 3 times. The upper or lower surface area of ​​the second light-shielding portion 452 is the upper or lower surface area of ​​the region within the virtual line connecting the outer edges of the second pattern P2. Here, the lower or upper surface area of ​​the second light-shielding portion 452 also includes the region overlapping with the third light-shielding portion 453.

[0075] The bottom surface area of the third light-shielding portion 453 can be 3 times or less, in the range of 1.2 to 3 times, or in the range of 1.2 to 2.5 times the top surface area of the light-emitting element 100. The top or bottom surface area of the second light-shielding portion 452 is the top or bottom surface area of the region within the virtual line connecting the outlines of the second pattern P2. The top surface area of the third light-shielding portion 453 includes the region that perpendicularly overlaps the second light-shielding portion 452. The bottom surface area of the second light-shielding portion 452 may be smaller than the top surface area of the first light-shielding portion 451 and larger than the bottom surface area of the third light-shielding portion 453. The top surface area of the first light-shielding portion 451 is the top surface area of the region connecting the outer outline lines of the first pattern P1, which is A1, and the top or bottom surface area of the second light-shielding portion 452 is the top or bottom surface area of the region connecting the outer outline lines of the second pattern P1, which is A2. When the bottom surface area of the third light-shielding portion 453 is A3, the following conditions can be satisfied.

[0076] Condition 1: A3 < A2 < A1 Condition 2: 1 < A2 / A3 < 1.7 Preferably, the condition of 1 < A2 / A3 ≤ 1.5 can be satisfied.

[0077] Condition 3: 2 < A1 / A3 < 6 Preferably, the condition of 3.5 < A1 / A3 < 5.5 can be satisfied.

[0078] Condition 4: 2 < A1 / A2 < 4.5 Preferably, the condition of 2.2 < A1 / A2 < 3.2 can be satisfied.

[0079] According to the above Conditions 1-4, the first to third light-shielding portions 451, 452, and 453 can prevent hot spots caused by the light emitted through the light-emitting surface 81 of the light-emitting element 100 and improve the light uniformity. Also, the first to third light-shielding portions 451, 452, and 453 can be provided with a uniform light transmittance according to the region according to Conditions 1-4, for example, a transmittance of 11% or less.

[0080] In order to improve the light-shielding effect of the light-shielding member 450, the overlapping area of ​​the upper surface region of the light-emitting element 100 and the first to third light-shielding portions 451, 452, and 453 can satisfy the following conditions. If the upper surface area of ​​the light-emitting element 100 is AO0, and the area of ​​the first light-shielding portion 451 that overlaps perpendicularly with the upper surface of the light-emitting element 100 (i.e., the lower surface area) is AO1, the area of ​​the second light-shielding portion 452 that overlaps perpendicularly with the upper surface of the light-emitting element 100 (i.e., the lower surface area) is AO2, and the area of ​​the third light-shielding portion 453 that overlaps perpendicularly with the upper surface of the light-emitting element 100 (i.e., the lower surface area) is AO3, then the following conditions can be satisfied.

[0081] Condition 1: AO3 <AO2<AO1<AO0 Condition 2:0.1 <A03 / AO0≦0.2 Condition 3:0.2 <A02 / AO0<0.3 Condition 4:0.6 <A03 / AO0<0.9 Condition 5:5 <A03 / A01<9 Condition 6:2 <A03 / A02<4 The areas where the first to third light-shielding portions 451, 452, and 453 and the light-emitting element 100 overlap vertically are the areas of the region that overlaps from the light-emitting surface 81 toward the rear surface of the light-emitting element 100. Since a certain area from the light-emitting surface 81 of the light-emitting element 100 is covered in this way, the upper part of the light-emitting surface 81 can be covered, and the light-shielding effect can be improved by the different thicknesses of the light-shielding portions 451, 452, and 453.

[0082] Referring to Figure 6, the distances E1, E2, and E3 from a straight line K2 perpendicular to the emission surface 81 of the light-emitting element 100 to the ends of the first to third light-shielding parts 451, 452, and 453 in the first direction X can satisfy the following conditions. The distance from the straight line K2 to the end of the first light-shielding part 451, i.e., the third edge 463, is E1, the distance from the straight line K2 to the end of the second light-shielding part 452 is E2, and the distance from the straight line K2 to the end of the third light-shielding part 453 is E3, and the distances E1, E2, and E3 can satisfy the following conditions. Here, the ends of the first to third light-shielding parts 451, 452, and 453 are the ends of each light-shielding part 451, 452, and 453 that are separated from each light-emitting element 100 in the emission direction or the first direction X.

[0083] Condition 1: E3 <E2<E1 Condition 2: 1.6mm <E3<2.6mm Condition 3: 2.4mm <E2<3.4mm Condition 4: 8.9mm <E1<10mm<B3 Condition 5:2 <E1 / E2<4 Condition 6:1 <E2 / E3<2 Condition 7:3 <E1 / E3<5.5 Under these conditions 1-7, the first, second, and third light-shielding portions 451, 452, and 453 have the above-mentioned distances on the light-emitting surface 81 of the light-emitting element 100 and cover it with the set thickness, thereby preventing hot spots on the upper and front regions of the light-emitting surface 81 of the light-emitting element 100 and improving light uniformity. Furthermore, under conditions 1-7, hot spots on the light-emitting surface 81 of the light-emitting element 100 can be controlled, and the thickness, pattern density, and area of ​​the light-shielding pattern can be optimized for each region, taking into account light diffusion in the separated region between two adjacent light-emitting elements 100. The straight line K1 perpendicular to the rear surface of the light-emitting element 100 overlaps perpendicularly with the light-transmitting layer 415 and can be separated from the light-shielding member 450. The rear surface of the light-emitting element 100 is the opposite side of the emission surface 81 and is a surface from which light does not emit. Light does not emit from the side of the light-emitting element 100 excluding the emission surface 81.

[0084] As shown in Figure 14, the example is an optical film having a light-shielding member printed by the inkjet printing method described above, while the comparative example is a film having a light-shielding member formed using a mask. Comparing the luminance of the comparative example and the example, it can be seen that the luminance distribution of the example can be improved by more than 4% compared to the comparative example. Table 1 below compares the luminance, color coordinate distribution CIEx, CIEy, color uniformity, and luminance change rate of the comparative example and the example. [Table 1]

[0085] Table 2 is a diagram comparing the luminous flux (Lumen) emitted from the light-shielding member according to the uniformity of the pattern of the light-shielding member produced by the silkscreen method in the comparative example and the inkjet printing method in the example. It can be seen that the example shows an improvement of 3% or more in luminous flux compared to the comparative example. [Table 2]

[0086] As shown in Figures 11 and 12, when an inkjet printer is supplied with a film such as an optical film 430, the optical film 430 is pressed by the roller section 650 and slides inward. At this time, the inkjet head section 600 is operated to dispense liquid light-shielding ink through nozzles 601, 602, and 603 in the head section 600, forming a pattern of the light-shielding member 450 disclosed above on one surface of the optical film 430. At this time, UV curing is performed by the first ultraviolet curing machine 610. Here, the nozzles 601, 602, and 603 may be nozzles that dispense different amounts to form patterns of different thicknesses in different regions of the light-shielding member 450, as shown in Figure 9a(A). As another example, the nozzles 601, 602, and 603 may be nozzles that dispense the same amount so that each layer of the light-shielding member 450 is formed to the same thickness, as shown in Figure 9a(B). Subsequently, the optical film 430 having the cured light-shielding member 450 is moved along the roller section 650 and then fully cured using the second ultraviolet curing machine 620. The light-shielding member 450 formed by this cured inkjet printing is provided as a pattern of white material having different thicknesses or heights in different regions, as shown in Figure 10a.

[0087] As shown in Figure 13, the optical film is pressurized and a servo motor is driven to supply the film into the roller section (S101). The film is adsorbed to fix its position before printing (S102), and after purging the ink before printing, nozzle cleaning is performed (S103). When the printer is ready to print, the inkjet head prints a light-shielding pattern onto the film surface and performs primary curing (S104). Depending on the nozzle type or the pattern formation method at this time, a light-shielding member can be selected from those shown in Figure 9a (A) and (B). After the printing of the light-shielding pattern is complete, secondary curing is performed on the pattern (S105). Here, a UV curing machine can be used for both primary and secondary curing. After that, the film with the printed light-shielding pattern is discharged (S106) to provide an optical film with the light-shielding member formed on it.

[0088] Figure 15 is a front view showing a light-emitting element on a substrate in a lighting module according to an embodiment. Referring to Figure 15, the light-emitting element 100 includes a body 10 having a cavity 20, a plurality of lead frames 30, 40 within the cavity 20, and a light-emitting chip 71 disposed on at least one of the plurality of lead frames 30, 40. Such a light-emitting element 100 can be embodied as a side-emitting package. The body 10 may include a cavity 20 with the lead frames 30, 40 exposed on its bottom surface. The plurality of lead frames 30, 40 may be separated, for example, into a first lead frame 30 and a second lead frame 40, and coupled to the body 10. The body 10 may be made of an insulating material. The body 10 may be made of a reflective material. The side of the body 10 where the cavity 20 is located may be an emission area, while the top and other sides may be non-emission surfaces.

[0089] The first lead frame 30 includes a first lead portion 31 located on the bottom surface of the cavity 20, a first bonding portion 32 extending to the outside of the main body 10, and a first heat dissipation portion 33. The second lead frame 40 includes a second lead portion 41 located on the bottom surface of the cavity 20, a second bonding portion 42, and a second heat dissipation portion 43 located in the outer region of the main body 10. Here, the light-emitting chips 71 and 72 may be, for example, located on the first lead portion 31 of the first lead frame 30 and connected to the first and second lead portions 31 and 41 by wire, or connected to the first lead portion 31 with adhesive and connected to the second lead portion 41 by wire.

[0090] The light-emitting chips 71 and 72 are arranged one or more times within the cavity 20 and emit light of the greatest intensity in the direction of the central axis. The light-emitting chips can be selected from, for example, red LED chips, blue LED chips, green LED chips, and yellow-green LED chips. A molding member 80 is placed in the cavity 20 of the main body 10, and the molding member 80 contains a translucent resin such as silicone or epoxy and may be formed in a single layer or multiple layers. A phosphor may be included on the molding member 80 or the light-emitting chip 71 to convert the wavelength of the emitted light, and the phosphor will excite a portion of the light emitted from the light-emitting chips 71 and 72 and emit it as light of a different wavelength. At least one or more light-emitting elements 100 are placed on the substrate 401, and a reflective member 410 is placed around the bottom of the light-emitting elements 100. The first and second lead portions 33 and 43 of the light-emitting element 100 are bonded to the pads 403 and 405 of the substrate 401 with conductive adhesive members 203 and 205, which are solder or conductive tape.

[0091] Figure 16 is a plan view of a vehicle to which a vehicle lamp to which a lighting module according to an embodiment is applied is applied, and Figure 17 is a drawing showing a vehicle lamp having a lighting module or lighting device disclosed in the embodiment. Referring to Figures 16 and 17, in vehicle 900, the taillight 800 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 the role of an indicator light, the second lamp unit 814 may be a light source for the role of a side marker light, and the third lamp unit 816 may be a light source for the role of a brake light, but is not limited to these. At least one or all of the first to third lamp units 812, 814, and 816 may include a lighting module disclosed in the embodiment. The housing 810 houses the first to third lamp units 812, 814, and 816 and may be made of a translucent material. In this case, the housing 810 can have a curve according to the design of the vehicle body, and the first to third lamp units 812, 814, and 816 can embody a surface light source having a curved surface according to the shape of the housing 810. Such vehicle lamps can be applied to vehicle turn signal lamps when the lamp units are applied to the vehicle's taillights, brake lights, or turn signal lamps.

[0092] The features, structures, and effects described in the above embodiments are included in at least one embodiment of the present invention, but are not necessarily limited to one embodiment. Furthermore, the features, structures, and effects exemplified in each embodiment can be combined or modified and implemented in other embodiments by a person with ordinary skill in the art to which the embodiment belongs. Therefore, such combinations and modifications should be interpreted as being included within the scope of the present invention. The above description has focused on embodiments, but these are merely examples and do not limit the present invention. A person with ordinary skill in the art to which the present invention belongs can make various modifications and applications not exemplified above, as long as they do not deviate from the essential characteristics of these embodiments. For example, each component specifically presented in the embodiments can be modified and implemented. And the differences related to such modifications and applications should be interpreted as being included within the scope of the present invention as defined in the appended claims.

Claims

1. An optical film having a diffusing agent, and a light-shielding member disposed on the upper surface or the lower surface of the optical film, wherein the light-shielding member includes a first light-shielding portion having a first pattern with a first thickness in a vertical direction, a second light-shielding portion having a second pattern with a second thickness greater than the first thickness, and a third light-shielding portion having a third pattern with a third thickness greater than the second thickness, the first to third light-shielding portions do not overlap with each other in the vertical direction, the first light-shielding portion has the largest pattern among the first patterns disposed around the second and third light-shielding portions, the second light-shielding portion has the largest pattern among the second patterns disposed on both sides of the third light-shielding portion in a first direction, the third light-shielding portion is adjacent to one side of the light-shielding member and has a single-sized third pattern, the upper surface area of the region connecting the outer contour lines of the first pattern of the first light-shielding portion is A1, the upper or lower surface area of the region connecting the outer contour lines of the second pattern of the second light-shielding portion is A2, the lower surface area of the third light-shielding portion is A3, Condition 1: A3 < A2 < A1 Condition 2: An optical plate satisfying 1 < A2 / A3 < 1.

7.

2. The optical plate according to Claim 1, satisfying Condition 3: 2 < A1 / A3 < 6.

3. The optical plate according to Claim 1, satisfying Condition 4: 2 < A1 / A2 < 4.

5.

4. The light-shielding member includes a first edge having a length long in a second direction orthogonal to the first direction, a third edge located on the opposite side of the first edge and having a plurality of first patterns arranged in the second direction, and a second edge having a first pattern arranged in a convex shape protruding from both ends of the first edge and both ends of the third edge to both sides in the second direction, and is the optical plate according to any one of Claims 1 to 3.

5. The second light-shielding portion includes a rear region disposed between the first edge of the first light-shielding portion and the third light-shielding portion, a corner region disposed at both front corners of the third light-shielding portion, and a front region disposed in front of the third light-shielding portion, the rear region is disposed long along one side surface or the rear surface of the third light-shielding portion, the front region is disposed long along the other side surface or the front surface of the third light-shielding portion, and is the optical plate according to Claim 4.

6. The outer surface of the second light-shielding portion contacts the first light-shielding portion, the outer surface of the third light-shielding portion contacts the first and second light-shielding portions, The third thickness is in the range of 2.5 times to 5 times the first thickness, The third thickness is in the range of 100 μm to 200 μm, the optical plate according to claim 4. **Claim 7** A substrate, A plurality of light-emitting elements disposed on the substrate and electrically connected to the substrate, A resin layer covering the plurality of light-emitting elements on the substrate, An optical film disposed on the resin layer, A plurality of light-shielding members disposed on the upper surface or the lower surface of the optical film, at least a part of which overlaps with each of the plurality of light-emitting elements in a vertical direction, Each of the plurality of light-emitting elements includes a light-emitting surface that emits light in a first direction on one side, Each of the plurality of light-shielding members includes a first light-shielding portion having a first pattern of a first thickness, a second light-shielding portion having a second pattern of a second thickness greater than the first thickness, and a third light-shielding portion having a third pattern of a third thickness greater than the second thickness, The first to third light-shielding portions overlap with the upper surface of the light-emitting element in a vertical direction, The first light-shielding portion has the largest pattern among the first patterns disposed around the second and third light-shielding portions, The second light-shielding portion has the largest pattern among the second patterns disposed on both sides in the first direction of the third light-shielding portion, The third light-shielding portion has a single large-sized third pattern having a length longer than the length in the second direction of each light-emitting element, The upper surface area of each light-emitting element is AO0, The lower surface area of the first light-shielding portion that overlaps perpendicularly with the upper surface of each light-emitting element is AO1, The lower surface area of the second light-shielding portion that overlaps perpendicularly with the upper surface of each light-emitting element is AO2, The lower surface area of the third light-shielding portion that overlaps perpendicularly with the upper surface of each light-emitting element is AO3, Condition 1: AO3 < AO2 < AO1 < AO0 Condition 2: 0.1 < A03 / AO0 ≤ 0.2 Condition 3: 0.2 < A02 / AO0 < 0.3, a lighting device that satisfies this. **Claim 8** Condition 4: 0.6 < A03 / AO0 < 0.9, the lighting device according to claim 7 that satisfies this. **Claim 9** Condition 5: 5 < A03 / A01 < 9, the lighting device according to claim 7 that satisfies this. **Claim 10** Condition 6: 2 < A03 / A02 < 4, the lighting device according to claim 7 that satisfies this. **Claim 11** The upper surface area of the region connecting the outer contour lines of the first pattern of the first light-shielding portion is A1, The upper or lower surface area of the region connecting the outer contour lines of the second pattern of the second light-shielding portion is A2, Condition 7: 1 < A2 / A03 < 1.7 Condition 8: The lighting device according to any one of claims 7 to 10, which satisfies 2 < A1 / A03 < 6.

12. The distance from the straight line perpendicular to the light emitting surface of each light emitting element in the first direction to the end of the first light shielding portion is E1, the distance to the end of the second light shielding portion is E2, and the distance to the end of the third light shielding portion is E3. Condition 10: E3 < E2 < E1 Condition 11: 1.6 mm < E3 < 2.6 mm Condition 12: The lighting device according to any one of claims 7 to 10, which satisfies 1 < E2 / E3 < 2.

13. A lamp including the lighting device, The lighting device is the lighting device according to any one of claims 7 to 10, The lamp is a vehicle lamp including at least one of a side mirror lamp, a width lamp, a fog lamp, a tail lamp, a brake lamp, a daytime running light, an interior vehicle lighting, a door scuff, a rear combination lamp, or a backup lamp.

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