Lighting modules, lighting devices, and taillights

Abstract

The present invention provides a lighting module and lighting device having a light source sealed within a resin layer and an optical pattern portion on the surface of the resin layer. [Solution] The lighting device 1000 may include a substrate 100, a reflective member disposed on the substrate 100, a plurality of light-emitting elements 300 disposed on the substrate 100, a resin layer 500 disposed on the reflective member, and an optical pattern portion 600 having a plurality of recesses formed concavely on the upper surface of the resin layer 500. The plurality of light-emitting elements 300 are spaced apart in a first direction from which light is emitted, and the optical pattern portion 600 may include a pattern portion in which the width of the recesses decreases in the first direction from a position overlapping the center of each of the plurality of light-emitting elements 300, and a pattern portion on both sides in a second direction from the center of the optical pattern portion 600 in which the width of the recesses decreases.

Description

Technical Field

[0001] Embodiments of the invention relate to a lighting module, a lighting device, and a taillight having a plurality of light sources and are as follows.

Background Art

[0002] Applications of lighting include not only vehicle lighting but also backlights for displays and signs A light-emitting element, such as a light-emitting diode (LED), has advantages such as low power consumption, semi-permanent life, fast response speed, safety, and environmental friendliness compared to existing light sources such as fluorescent lamps and incandescent lamps The light-emitting diode is applied to various lighting devices such as various display devices, indoor lights, or outdoor lights As a vehicle light source, a lamp employing a light-emitting diode has been proposed Compared with an incandescent lamp, the light-emitting diode is advantageous in that it has low power consumption, and because of its small size, it can increase the degree of freedom in lamp design and is more economical in terms of its semi-permanent life However, since the emission angle of the 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

Summary of the Invention

Problems to be Solved by the Invention

[0003] Embodiments of the invention can provide a lighting module and a lighting device having a light source sealed in a resin layer and an optical pattern portion on the surface of the resin layer Embodiments of the invention can provide a lighting module and a lighting device having a light source sealed in a resin layer and an optical pattern portion in which recesses recessed toward a substrate are arranged on the surface of the resin layer and are as follows.

[0004] In an embodiment of the invention, recesses are arranged from the upper periphery of each light source toward the lower surface of the resin layer. We can provide installed lighting modules and lighting devices. [Means for solving the problem]

[0005] An embodiment of the invention includes a substrate, a reflective member disposed on the substrate, and A plurality of light-emitting elements arranged on a substrate, a resin layer arranged on the reflective member, and The optical pattern portion includes having a plurality of recesses formed concavely on the upper surface of the resin layer, The number of light-emitting elements are spaced apart in a first direction from which light is emitted, and the optical pattern portion is the plurality A pattern in which the width of the recess decreases in the first direction from a position that coincides with the center of each light-emitting element. The optical pattern portion includes the optical pattern portion and the optical pattern portion has the optical pattern portion extending in a second direction on both sides from the center of the optical pattern portion. The pattern may include a section in which the width of the recess is reduced.

[0006] According to an embodiment of the invention, the pattern portion of the optical pattern portion comprises two or more pattern portions. Including, each of the two or more pattern portions comprises a plurality of recesses arranged in the first and second directions. It may have parts. Each of the two or more pattern parts is between the plurality of recesses It may include a protrusion. The adjacent first pattern portion may have a recessed portion with a width greater than the convex portion. In the turn portion, the second pattern portion, which is furthest from the center of the light-emitting element, has a convex width in the concave portion. The width of the part may be the same as or smaller than the width of the part. According to an embodiment of the invention, the optical pattern part is The multiple recesses placed therein can have the same depth as each other. The multiple recesses placed thereon have different depths from each other, and the depth of the recesses is above the light-emitting element. The recess in the first pattern section located in the section is the largest, and the outer casing of the optical pattern section is located in the section. The depth of the recess in the second patterned section may be the smallest. The recess is a polygonal prism or lower It can have a columnar shape with a curved surface. The optical pattern portion is the most in the first direction The longest length may be smaller than the maximum length in the second direction. The optical pattern portion is the light emission portion. The optical pattern portion is located on the upper part of each element, and the area of ​​the light-emitting element is The area can be in the range of 6 to 18 times the area of ​​the recess. The width of each of the recesses is 0.2 The recess can have a depth in the range of 5 mm to 0.5 mm. The depth of the recess is 0.25 mm to 0. It can have a range of 65 mm. The taillight according to the embodiment of the invention is flexible. The aforementioned lighting device may be provided. [Effects of the Invention]

[0007] According to embodiments of the invention, the light distribution characteristics of a vehicle lighting device can be improved. This increases the light distribution efficiency because the reflected light from the optical pattern on the surface of the resin layer is reduced. The lighting device emits light by refracting it with an optical pattern on the surface of the resin layer. The amount of light increases. The lighting device can provide directionality for the light distribution. The design involves placing the optical pattern portion on the resin layer, thereby providing a thinner lighting module. This is possible. The lighting device can improve the reliability of lighting having an optical pattern section. . [Brief explanation of the drawing]

[0008] [Figure 1] This is an example of a plan view of a lighting device according to an embodiment of the invention. [Figure 2] It is a partially enlarged view of the resin layer in FIG. 1. [Figure 3] It is a drawing showing an example of a concave portion of an optical pattern portion according to an embodiment of the invention. [Figure 4] It is a drawing showing a modified example of a concave portion of an optical pattern portion according to an embodiment of the invention. [Figure 5] It is an example of a side sectional view in the first direction of the lighting device in FIG. 1. [Figure 6] It is an enlarged view of region A1 in FIG. 5. [Figure 7] As a first example of the optical pattern portion of the invention, it is an example of viewing region A2 in FIGS. 2 and 5 on a plane. [Figure 8] As region A2 in FIG. 5, it is a side sectional view of A - A' in FIG. 7. [Figure 9] It is an example of a side sectional view of B - B' in FIG. 7. [Figure 10] It is a drawing showing an example of a lighting module provided with a resin layer having a second example of the optical pattern portion of the invention. [Figure 11] It is a side sectional view of C - C' in FIG. 10. [Figure 12] It is a side sectional view of D - D' in FIG. 10. [Figure 13] It is a drawing showing an example of a lighting module provided with a resin layer having a third example of the optical pattern portion of the invention. [Figure 14] It is a side sectional view of E - E' in FIG. 13. [Figure 15] It is a side sectional view of F - F' in FIG. 13. [Figure 16] As a fourth example of the optical pattern portion of the invention, it is an example of a side sectional view of A - A' in FIG. 5. [Figure 17] As a fourth example of the optical pattern portion of the invention, it is an example of a side sectional view of B - B' in FIG. 5. [Figure 18] (a), (b), (c) are the light distribution distributions in Examples 1, 2, and 3 of the optical pattern portion according to the embodiment of the invention, and (d) is a drawing showing the light distribution distribution of the comparative example. [Figure 19] It is a drawing showing an example of a plan view of a vehicle having the lighting device of the invention. [Figure 20] Figure 19 shows an example of a vehicle's taillights with the lighting device applied. [Modes for carrying out the invention]

[0009] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. The technical concept is not limited to the specific examples described, but rather encompasses a diverse range of forms that differ from one another. It can be embodied in a certain manner, and within the scope of the technical concept of the present invention, the components between embodiments One or more of these can be selectively combined or substituted for each other and used. Terms used in examples (including technical and scientific terms) are subject to explicit designation unless otherwise specified. This is interpreted as meaning that can be generally understood by a person with ordinary skill in the art to which this invention belongs. Terms that are commonly used, like those defined in dictionaries, have meaning within the context of the technology they relate to. The meaning can be interpreted by considering the taste. Furthermore, the terminology used in the embodiments of this invention is: This specification is for illustrative purposes only and is not intended to limit the present invention. In this context, the singular form can also include the plural form unless otherwise specified in the description, such as "A and B If it says "at least one of C (or more than one)", then combine A, B, and C. It may include one or more of all possible combinations. In describing the constituent elements, terms such as 1st, 2nd, A, B, (a), (b), etc., can be used. Such terminology is used to distinguish one component from another, and The terminology does not limit the nature or order of the constituent elements. If it is stated that a component is “linked,” “joined,” or “connected” to another component, The components may be directly connected or linked to other components, or between each component Furthermore, this includes all cases where other components are "linked," "joined," or "connected." When it is stated that a component is formed or positioned "above or below", the term "above or below" is used. This applies not only when two components are in direct contact, but also when one or more other components are in direct contact. This also includes cases where it is formed or positioned between two constituent elements. It can also be expressed as "above or below". In this case, one component is used as a reference point, and the meaning includes not only the upward direction but also the downward direction. It is possible.

[0010] The lighting device according to the present invention is suitable for a variety of lamp devices that require lighting, such as vehicle lamps. Applicable to household lighting fixtures or industrial lighting fixtures. For example, applicable to vehicle lamps. In this case, headlights, side marker lights, turn signals, side mirror lights, fog lights, taillights (Tai (l lamp), brake lights, daytime running lights, interior lighting, door scuffs, rear combination lights Applicable to lamps, backup lamps, etc. The lighting device of the present invention is for indoor and outdoor advertising It can be applied to devices, display devices, and various types of trains, and is also currently being developed for commercial use. Whether it has been implemented or is feasible in the future due to technological advancements, this applies to all lighting-related fields, advertising-related fields, etc. It can be said that it is applicable.

[0011] Figure 1 is an example of a plan view of a lighting device according to an embodiment of the invention, and Figure 2 shows the resin layer part of Figure 1. Figure 3 is a magnified view showing an example of a recess in the optical pattern portion according to an embodiment of the invention. Figure 4 is a diagram showing a modified example of the recess in the optical pattern portion according to an embodiment of the invention. Figure 5 is an example of a side cross-sectional view of the lighting device in Figure 1 in the first direction, and Figure 6 is an example of the A1 region in Figure 5. This is an enlarged view, and Figure 7 shows a first example of the optical pattern portion of the invention, compared to the optical patterns in Figures 2 and 5. This is an example of the n-section viewed in a plane, and Figure 8 is a cross section of A-A' in Figure 7, which is region A2 in Figure 5. This is a top view, and Figure 9 is an example of a side section view of section B-B' in Figure 7.

[0012] Referring to Figures 1 to 6, the lighting device 1000 according to an embodiment of the invention has a light-emitting element 300 and The light-emitting element 300 is sealed and includes a resin layer 500 having an optical pattern portion 600. This is possible. The lighting device 1000 is located below the light-emitting element 300 and the resin layer 500. The lighting device 1000 may include the arranged substrate 100 and The lighting device 1 may include a reflective member 400 disposed between the resin layers 500. 000 can emit the light emitted from the light-emitting element 300 as surface light. The optical element 300 is a package having an LED chip, or a light source having an LED chip, or It can be defined as a light source that emits visible light. The illumination device 1000 is a light-emitting cell or This can be defined as a light source module. The lighting device 1000 is the substrate 100 It may contain one or more light-emitting cells on top.

[0013] <Substrate 100> Referring to Figures 1 to 6, the substrate 100 is a printed circuit board (PCB). The substrate 100 may include, for example, a resin-based printed circuit board (PCB). ), PCBs with metal cores, PCBs made of flexible material, ceramic The substrate 1 may include at least one of the following: a PCB made of kus material or an FR-4 substrate. When 00 is placed on a metal core PCB with a metal layer at the bottom, heat dissipation of the light-emitting element 300 Efficiency can be improved. The substrate 100 is electrically connected to the light-emitting element 300. The substrate 100 includes a wiring layer (not shown) on its upper surface, and the wiring layer is a light-emitting element. It is electrically connected to 300. Multiple light-emitting elements 300 are arranged on the substrate 100. In this case, the multiple light-emitting elements 300 are connected in series, parallel, or series-parallel by the wiring layer. The substrate 100 is positioned below the light-emitting element 300 and the resin layer 500. It can function as a support member or a mounting member. The upper surface of the substrate 100 is X-Y It may have a flat surface. The upper surface of the substrate 100 may have a flat surface or a curved surface. The thickness of the substrate 100 may be the height in the vertical or Z direction. Here, in the X-Y plane, the X direction may be the first direction, and the Y direction may be the second direction. It may be present. The Z direction may be a direction perpendicular to the first and second directions. The number of light-emitting elements 300 are arranged on the substrate 100 at predetermined intervals X1 in a first direction X. The substrate 100 may be provided in a straight or curved bar shape in the longer direction. The substrate 100 may include a light-transmitting material that allows light to pass through its upper and lower surfaces. The aforementioned translucent material is PET (Polyethylene terephthalate), PS (Polystyrene), PI (Polystyrene It can contain at least one of the following: (mide)

[0014] The substrate 100 is an insulating layer that protects the pads and circuit patterns located on top of it. Alternatively, it may include a layer of reflective material.

[0015] <light-emitting element 300> Referring to Figures 1 to 6, the light-emitting element 300 is mounted on the substrate 100, with at least one element The light-emitting element 300 is arranged along one direction X and emits light in the first direction X. These may be arranged in N rows and / or M columns on the substrate 100, where N and M are 2 or more. This may also be the case. The plurality of light-emitting elements 300 are arranged on the substrate 100 at regular intervals. They may be arranged in a matrix or in a form with irregular spacing. The light-emitting element 30 0 means that the light with the highest intensity is emitted in one direction. The light-emitting element 300 emits light. It may have an ejection surface 381 to which the injection is directed, and the ejection surface 381 may be, for example, the substrate 100 The horizontal upper surface may be positioned in a third direction or perpendicularly. The ejection surface 381 is The surface may be a vertical plane, or it may include a concave or convex surface. As shown in Figure 6, the light-emitting element Child 300 has one or more conductive frames 103 positioned at its lower part, and the conductive frame Frame 103 is a lead frame, facing the substrate 100, and conductive bonding member 153 The conductive bonding member 103 is electrically connected to the pads of the substrate 100. It may be made of a dur material or a metallic material. As another example, the light-emitting element 300 is made of a substrate A first light-emitting element and a second light-emitting element are arranged from one end of 100 in the direction of emission from the first light-emitting element. The first and second light-emitting elements are located in the direction of the other end of the substrate 100 or in the first direction. Light will be irradiated. That is, the first light-emitting element irradiates light in the direction of the second light-emitting element, The second light-emitting element emits light in the direction of the other end of the substrate 100 or in the direction opposite to where the first light-emitting element is located. It will be irradiated.

[0016] As shown in Figure 6, the light-emitting element 300 is an element having a light-emitting chip 371 inside its main body. Alternatively, the package may include the light-emitting chip 371 in which it is packaged. Chip 371 is an LED chip, and is molded within the main body by a molding material. The injection surface 381 may be the surface of the molding member. The binding material may be made of a transparent resin material such as silicone or epoxy. The light-emitting chip 371 emits at least one of the following colors: blue, red, green, ultraviolet (UV), or infrared. The LED chip is provided to emit light, and the light-emitting element 300 emits white, blue, red, green, and red It can emit light from at least one of the external rays. The light-emitting element 300 has a bottom portion facing forward It may also be a side-view type that is electrically connected to the circuit board 100. This is not limited to the above. As another example, the light-emitting element 300 is an LED chip. Or a top-view package would also be acceptable.

[0017] The emission surface 381 of the light-emitting element 300 is at least one side other than the upper surface of the light-emitting element 300. It is arranged on the surface. The emission surface 381 is one of the side surfaces of the light-emitting element 300 adjacent to the substrate 100. It may be a side surface that is in contact with the substrate 100, or a side surface perpendicular to the upper surface of the substrate 100. It is positioned on the side surface between the bottom and top surfaces of the light-emitting element 300, and is the highest in the first direction X. This will result in the emission of intense light.

[0018] Some of the light emitted through the emission surface 381 of the light-emitting element 300 is directed onto the substrate 100. It either propagates in a direction parallel to the surface, or is reflected by the reflective member 400, or the resin layer 50 It progresses in the upward direction of 0. The thickness of the light-emitting element 300 is, for example, 3 mm or less, for example, 0. The length k1 in the second direction of the light-emitting element 300 can be in the range of 8 mm to 2 mm. The thickness of the light-emitting element 300 may be 1.5 times or more. When observing the light distribution at 0, the light directivity angle in the ±Z direction is wider than the light directivity angle in the ±Y direction. The optical beam angle of the 300's second direction Y is 110 degrees or more, for example, 120 to 160 degrees or 14 The range can be 0 to 170 degrees. The optical direction of the third direction Z of the light-emitting element 300. The angle can be greater than 110 degrees, for example, in the range of 120 to 140 degrees.

[0019] <Reflective material 400> Referring to Figures 1 to 6, the reflective member 400 is separately positioned on the upper part of the substrate 100. The reflective member 4 may be a layer that has been applied or a layer that protects the upper part of the substrate 100. 00 may be placed, for example, between the substrate 100 and the resin layer 500. The reflective portion The material 400 may be provided in the form of a film having a metallic or non-metallic material. The reflective member 400 may be bonded to the upper surface of the substrate 100. The reflective member 400 is The reflective member 400 can have an area smaller than the upper surface area of ​​the substrate 100. The resin layer 500 is separated from the edge of the substrate 100, and the separated region is the substrate It is attached to 100. At this time, to prevent the edge portion of the reflective member 400 from peeling off. This is possible. The reflective member 400 may have a dot-shaped reflective pattern arranged on its upper surface. However, it is not limited to this. As shown in Figure 6, the reflective member 400 is the light emitter The lower part of the element 300 may be included in the opening 410. The top surface of the substrate 100 is exposed in the opening 410, and the frame of the light-emitting element 300 is The part to be bound is positioned. The size of the opening 410 is the same as the light-emitting element 300 The size may be the same as or larger than the aforementioned, but is not limited to this. The reflective member 400 is in contact with the upper surface of the substrate 100, or the resin layer 500 and the substrate 1 It is bonded between 00. Here, the reflective member 400 is on the upper surface of the substrate 100 If a highly reflective material is coated, it is removed. The reflective member 400 is the light-emitting element. It may be formed with a thickness less than 300. The thickness of the reflective member 400 is 0.2 m The opening 41 of such a reflective member 400 can have a range of m ± 0.02 mm. The lower part of the light-emitting element 300 can pass through 0, and the upper part of the light-emitting element 300 protrudes. The emission surface 381 of the light-emitting element 300 is perpendicular to the upper surface of the reflective member 400. It will be provided to.

[0020] The reflective member 400 may be made of a metallic material or a non-metallic material. The nonmetallic material may include metals such as aluminum, silver, and gold. This may include plastic or resin materials. The resin material may be silicone. Alternatively, a reflective material, such as a metal oxide like TiO2, Al2O3, or SiO2, is added to the epoxy. The reflective member 400 is embodied in a single layer or multiple layers, and such a layered structure reflects light. Efficiency can be improved. The reflective member 400 according to the embodiment of the invention reflects incident light. By doing so, the amount of light can be increased so that the light is emitted in a uniform distribution. Another example Therefore, the reflective member 400 may be removed from the substrate 100.

[0021] <Resin layer 500> The resin layer 500 is placed on the substrate 100. The resin layer 500 is either facing or bonded to the plate 100. The resin layer 500 covers the entire upper surface of the substrate 100. It is placed on a portion of the area. The lower surface area of ​​the resin layer 500 is equal to the upper surface area of ​​the substrate 100. It may be the same as, or 80% or more of the upper surface area of ​​the substrate 100. The resin layer 5 00 can be made of a transparent material and can guide or diffuse light. The resin layer 500 contains a UV-curing resin material and can be used in place of the light guide plate. UV-curing resin material offers the convenient advantage of adjustable refractive index and thickness. Furthermore, the resin layer... 500 uses oligomers as the main material, and mixes IBOA, diluent monomers and GMA. Hardness, heat resistance, and transmittance can be adjusted, and adhesion and oxidation prevention can be suppressed. The resin layer 500 contains a photoinitiator and a photostabilizer to control curing and suppress discoloration. This is possible. The resin layer 500 is provided as a layer that guides light with resin, so glass It can be supplied at a thinner thickness compared to the previous method, and can be supplied as a flexible plate. The resin layer 500 emits point light from the light-emitting element 300 in the form of line light or surface light. It can be released. The resin layer 500 contains beads (not shown). This allows light to be diffused. The upper part of the resin layer 500 is the light-emitting element 300 Since it is placed on top of the above, the light-emitting element 300 can be protected, and the light-emitting element 300 The loss of light emitted from can be reduced. The light-emitting element 300 is the resin layer 50 It is embedded in the lower part of 0. The resin layer 500 is in contact with the surface of the light-emitting element 300. This allows the light-emitting surface 381 of the light-emitting element 300 to come into contact with the resin layer 50 A portion of the 0 is placed in the opening 410 of the reflective member 400. A portion of the resin layer 500 The reflective member 400 can contact the upper surface of the substrate 100 through the opening 410. Yes, it is possible. As a result, a portion of the resin layer 500 comes into contact with the substrate 100, The injection member 400 can be fixed between the resin layer 500 and the substrate 100.

[0022] The thickness of the resin layer 500 is 5 mm or less, for example, in the range of 2 mm to 5 mm. Yes, if the thickness of the resin layer 500 is greater than the range, the luminosity or light-shielding properties will decrease. The increased module thickness makes it difficult to provide it as a flexible module. When the thickness of the resin layer 500 is smaller than the range, it provides a surface light with uniform luminous intensity. There are difficulties in this regard. The length of the resin layer 500 in the first direction X is in the first direction of the substrate 100. The substrate 100 is arranged along the second direction Y, and the length of the second direction Y is arranged along the second direction. The resin layer 500 is 80% or more of the length of the substrate 100 in the first and second directions, for example, 8 They are arranged in the range of 0% to 100%. Each side surface of the resin layer 500 is each of the substrate 100 It is positioned on the same plane as the side surface or adjacent to it. The resin layer 500 has multiple light-emitting elements. The resin layer 50 may be provided in a size that covers the element 300 or may be connected to one another. 0 is separated to a size that covers each light-emitting element 300, and each light-emitting element 300 and each resin layer It is separated into a light-emitting cell having 500. The resin layer 500 includes an optical pattern portion 600. The optical pattern section 600 reflects or refracts the incident light, It can suppress spotting.

[0023] <Optical pattern section 600> As shown in Figures 1, 2, and 5, the optical pattern portion 600 is on the upper surface of the resin layer 500. It is formed in a concave pattern. The concave pattern is formed on the upper surface of the resin layer 500 to a predetermined depth. The optical pattern portion 600 may include recesses 60 arranged with They are positioned on top of the optical element 300, and the substrate 100 is positioned from the upper surface of the resin layer 500. It may include recesses 60 formed in a certain direction. Protrusions 70 are arranged between the recesses 60. Each of the multiple optical pattern sections 600 is arranged in the direction in which the light-emitting element 300 is positioned. For example, they are spaced apart along X). For example, the spacing X2 between the optical pattern portions 600 is The spacing X1 between the light-emitting elements 300 may be smaller than the optical pattern portion 600. Each of them is separated from the outer surface or edge of the resin layer 500.

[0024] The first part of the optical pattern section 600 is perpendicular to the light-emitting element 300 or in a third direction. It may be a region that overlaps with Z. The second part of the optical pattern portion 600 is the periphery of the first part. It may be an edge region, and may also be an upper region from which light is emitted with respect to the first part. The optical pattern portion 600 receives light from the upper part of each of the plurality of light-emitting elements 300. By refracting or reflecting light, hot spots are suppressed on each of the upper parts of the light-emitting element 300. This is possible. As shown in Figures 2 and 7, each of the optical pattern sections 600 is a second The maximum length b2 in the direction Y may be greater than the maximum length b1 in the first direction X. Each of the parts 600 has a radius of 10 mm or less in the direction of the long axis (for example, the second direction) from the center. The first of the optical pattern section 600 is located within a region where the radius in the short axis direction is 6 mm or less. The maximum length b1 in direction X can be 8 mm or more, for example, in the range of 8 mm to 12 mm. The maximum length b2 of the optical pattern portion 600 in the second direction Y is 10 mm or more, for example. It can have a range of 10 mm to 20 mm or a range of 12 mm to 20 mm. Each of the optical pattern sections 600 is based on the directional angle characteristics of the light-emitting element 300, that is, the optical axis. It has a size that corresponds to the characteristic where the angle of direction in the second direction Y is greater than the angle of direction in the third direction Z. This allows the optical pattern portion 600 to be positioned in front of the light-emitting element 300 along the optical axis. It can effectively refract or reflect light traveling in the third direction Z with respect to the second Light traveling in direction Y can be effectively refracted or reflected. The patterned section 600 can reduce the straight-line propagation of incident light and improve the light diffusion efficiency. .

[0025] As shown in Figure 2, the optical pattern portion 600 overlaps the upper part of the light-emitting element 300. The width k2 of the first part may be greater than the length k1 of the light-emitting element 300. This results in light emission. The light traveling towards the top of element 300 can be effectively refracted and diffused in other directions. Here, if the light-emitting element 300 is arranged in the first direction X, the first light-emitting element and the second It can be defined as a light-emitting element. The optical pattern portion 600 is arranged in the first direction X. In this case, the first optical pattern section and the second optical pattern section can be defined. The optical element irradiates light either forward or backward from the second light-emitting element, and the second light-emitting element The child shines light forward. The first optical pattern portion is on the upper surface of the resin layer 500. The upper surface and front upper part of the first light-emitting element are covered by the second optical pattern section, The upper surface of the lipid layer 500 can cover the upper surface and the front upper part of the second light-emitting element. The first and second optical pattern sections receive light incident from the first and second light-emitting elements, respectively. It can be diffused by refracting or reflecting light.

[0026] The lighting device 1000 according to an embodiment of the invention has an uneven pattern on the surface of the resin layer 500. By arranging the optical pattern section 600, a light-shielding member is formed separately on top of the resin layer 500. A structure comprising a layer for this purpose, or an adhesive layer for bonding a layer having a light-shielding member to a resin layer. It can be removed. For light diffusion, a diffusion plate is further placed on the resin layer 500. The lighting device can be equipped with or further provided with internal or external lenses. It can provide a thickness of 1000, and the refracted light travels in the direction of the light's orientation, finger The direction distribution can be improved.

[0027] As shown in Figures 1 to 4, the optical pattern portion 600 includes a plurality of recesses 60, and the recesses The top view shape of 60 is a polygon (e.g., triangle, quadrilateral, or pentagon). Alternatively, it may have a circular or elliptical shape. The upper surface area of ​​each of the recesses 60 is They may be provided in the same size or different sizes. Each of the recesses 60 The top surface area is arranged to be the same size in each region, and different sizes in different regions. It may be provided in a form. The recesses 60 are spaced apart at predetermined intervals, and the interval is the The lengths of the first and second directions X and Y may be smaller. The spacing between the recesses 60 is They may be the same. The spacing between the recesses 60 is such that there is a region with a constant spacing and the spacing is greater than the distance between the recesses 60. The recess 60 may include areas with small or large gaps. The spacing between the two points and the second direction Y may be the same or different.

[0028] As shown in Figures 2 and 3, the optical pattern portion 600 has a recess 60 and a protrusion 7 in the first direction X. The zeros are arranged alternately. The optical pattern portion 600 has a recess 60 and a convex portion 70 in the second direction Y. These are arranged alternately. The side cross-section of each of the recesses 60 can have a polygonal shape. The recess 60 can be made even if the width in the first direction X or / and the second direction Y is less than the depth h1. Good. The recess 60 may have a columnar shape with a depth h1. The recess 60 is The upper width and lower width may be the same. The bottom 6 of the recess 60 may include a flat surface. The upper surface 7 of the protrusion 70 between the recesses 60 has a constant width or a different width depending on the region. The protrusions 70 are connected to each other, and the recesses 60 are located inside the protrusions 70. It may be provided in a form that is recessed downwards in the region. The recess 60 reflects incident light. Alternatively, it can be refracted and diffused. The convex portion 70 reflects or It can be refracted or guided upwards to diffuse the light.

[0029] As shown in Figures 2 and 4, the side cross-sections of the recesses 60A of the optical pattern portion 600 are The columnar shape may be formed. The lower part of the recess 60A may be hemispherical in shape. The bottom 6A may include a concave curved surface. The recess 60A may be in a first direction and / or a second direction. The width in the direction may be less than the depth h1. The upper width of the recess 60A is greater than the minimum lower width. It is not necessary. The upper surface 7A of the protrusion 70A between the recesses 60A has a constant width or in a region The protrusions 70A are connected to each other, and the recesses 60 A may be provided in a form that is recessed downwards within the area of ​​the protrusion 70A. The curvature of the 60A surface can be 0.08 or greater, for example, in the range of 0.08 to 0.12. It is possible. By using a curved surface with such curvature, the emission efficiency of incident light can be improved. Here, the curvature of the recess 60A is the curvature between the bottom 6A and the side surface, and the curvature within the recess 60A. It may also be the curvature of the corner portion between the sides. The width of the recess 60A is 0.25 mm or more. It is also possible to have a range of, for example, 0.25 mm to 0.45 mm.

[0030] Referring to Figure 4, the light incident on the concave curved surface of the recess 60A is refracted for light extraction. The angle at which it enters and the angle at which it exits are as shown in equations 1-3.

[0031] 90 - θ4 = asin(1.47sin(90 - θ3))...Equation 1 47.1°<90°-θ3<90°...Equation 2 0°<90 - θ3<47.1°...Equation 3 Here, 1.47 is the refractive index of the resin layer 500. The angle θ3 is the recess 60A. The angle of light incident on a tangent line passing through the curved surface of the recess 60A is the angle of light incident on the tangent line passing through the curved surface of the recess 60A. The angle at which light is refracted with respect to a tangent line passing through the recess 60A, where angle θ5 is the angle at which light is transmitted through the recess 60A. This is the angle between the light and the horizontal upper surface of the resin layer 500. The angle θ5 is 35 ± 15 degrees. It can have a range. The condition in formula 2 is that the light incident on the recess 60A is totally reflected. This angle can reduce the light transmittance. Here, the curvature of the bottom of the recess 60A is The design takes into account the critical angle of the material of the resin layer 500. The condition in equation 3 above is the recess 6 This is the angle at which light incident on 0A is transmitted, and the light is refracted and emitted to the outside. The angle θ5 between the light that is transmitted and the horizontal upper surface of the resin layer 500 determines whether the light-emitting element 300 is... The efficiency of light emitted forward is increased, and the lighting device has a directional light distribution. This is possible. That is, when a lighting device is positioned on the side behind the vehicle lamp, the light-emitting element 3 Light emitted from 00 is emitted at the angle θ5. Therefore, it is positioned on the rear side of the vehicle lamp. The installed lighting device can provide a directional light distribution that moves in a backward direction. .

[0032] As shown in Figures 3 and 4, the depth h1 of the recesses 60 and 60A of the optical pattern portion 600 is It may be 0.25 mm or more, for example, it may be in the range of 0.25 mm to 0.8 mm. Yes, it is possible. The depth h1 of the recesses 60 and 60A of the optical pattern portion 600 is constant or The depth may vary depending on the region. For example, the depth may differ depending on the region of the recesses 60 and 60A. If the depth h1 is such that the first region adjacent to the light-emitting element 300 is deep, the light-emitting element 3 The second region, which is farther from 00, can have a smaller depth than the first region. Such a concave Sections 60 and 60A are formed by etching or molding of the resin layer 500. It may be formed by the degree.

[0033] Figures 7 to 9 show the configuration of the optical pattern section according to the first example of the invention.

[0034] Referring to Figures 7 to 9, the optical pattern portion 600 has a maximum length b2 in the second direction Y. It may be greater than the maximum length b1 in the first direction X, for example, the maximum length b2 in the second direction Y is The maximum length b1 in the first direction X is 120% or more, for example, in the range of 120% to 180%. It is possible. The area of ​​the region formed by connecting the outermost patterns of the optical pattern section 600 is The upper surface area of ​​the light-emitting element 300 is six times or more, for example, in the range of 6 to 18 times. Yes, it is possible. As a result, the optical pattern section 600 is located above and in front of the light-emitting element 300. It covers the area and can reflect or refract incident light. The optical pattern section 6 00 is the width of the multiple pattern sections 610, 620, 630, 640 arranged in the first direction X. w1, w2, w3, and w4 may be different. The plurality of pattern sections 610, 620, 63 0, 640 are extended in the second direction Y. For example, the plurality of pattern portions 610, 620 630 and 640 are arranged at the same depth h1 and are adjacent in the first and second directions X and Y. Are the pitches P1, P2, P3, and P4 between the recesses 61, 62, 63, and 64 the same, or The pattern portion 6 may become wider as it moves away from the emission surface 381 of the optical element 300. 10, 620, 630, and 640 each have recesses 61, 62, 63, and 64 and protrusions 71, respectively. , including 72, 73, 74, the recesses 61, 62, 63, 64 and the protrusions 71, 72, 73, 74 is arranged alternately between the multiple pattern sections 610, 620, 630, 640. The intermediate protrusions 77, 78, and 79 have widths w1, w2, and w of the adjacent recesses 61, 62, 63, and 64. 3. The width of the adjacent protrusions 71, 72, 73, 74 is greater than at least two of the w4. At least one of these widths may be the same as or greater than the other width.

[0035] The optical pattern portion 600 extends in a first direction X from the center of the position where the light-emitting element 300 is placed. First pattern section 610, second pattern section 620, third pattern section 630 and fourth pattern The parts 640 may be arranged in that order. The optical pattern part 600 is where the light-emitting element 300 is placed. The first pattern portion 6 is located at a position or on both sides in the second direction Y from the center of the optical pattern portion 600. 10. The second pattern section 620, the third pattern section 630, and the fourth pattern section 640 are arranged in that order. They may be placed. Each of the first to fourth pattern sections 610, 620, 630, and 640 Intermediate protrusions 77, 78, and 79 are positioned between them. The first to fourth pattern sections 610, 62 0, 630, and 640 respectively have recesses 61, 62, 63, and 64 and protrusions 71, 72, and 73. , 74 are arranged alternately. The first pattern portion 610 consists of a plurality of first recesses 61 and a plurality The first recess 61 includes a first protrusion 71, and the width w1 of the first recess 61 is positioned between the first recess 61. The width of the protrusion 71 may be greater than the width of the second pattern portion 620. The second pattern portion 620 has a plurality of second recesses 62 It includes a plurality of second protrusions 72, and the width w2 of the second recess 62 is arranged between the second recesses 62. The width may be greater than that of the second protrusion 72.

[0036] The third pattern portion 630 includes a plurality of third recesses 63 and a plurality of fourth protrusions 73, The width w3 of the third recess 63 is smaller than the width of the third protrusion 73 located between the third recesses 63. The fourth pattern portion 640 may be a plurality of fourth recesses 64 and at least one fourth protrusion. The fourth protrusion 74 includes a portion 74, the width of which is the width of the fourth recess 64 and is located between the fourth recess 64. It can be smaller than the width.

[0037] With reference to the position that coincides with the center of the light-emitting element 300, the first recess ~ front in the first direction X The widths w1, w2, w3, and w4 of the fourth recesses 61, 62, 63, and 64 gradually decrease. From a position overlapping with the center of sub-300 or from the center of the optical pattern portion 600, on both sides in the second direction Y. The widths w1, w2, w3, w4 of the first to fourth recesses 61, 62, 63, 64 are gradually Reduce. For example, the width of each of the first to fourth recesses 61, 62, 63, and 64 is w1> The condition w2 > w3 > w4 can be satisfied. The width w1 is 0.4 mm or more, for example 0.4 The range is mm to 0.6 mm, and the width w2 is less than 0.4 mm, for example, 0.32 mm to 0. The range is 39 mm, and the width w3 is 0.3 mm or less, for example, 0.29 mm to 0.38 mm. The range is m, and the width w4 is 0.2 mm or more, for example, in the range of 0.2 mm to 0.28 mm. It may also be the case that the width w1 of the first recess 61 is at least twice the width w4 of the fourth recess 64. It may be present. The widths d1, d2, and d3 of the intermediate protrusions 77, 78, and 79 are, width d1 <d2< It can satisfy d3, with a minimum of 0.01 mm and a maximum of 0.5 mm or less. Good. That is, the maximum width d3 is in the range of 0.4 mm to 0.5 mm, and the minimum width d1 is 0.0 It can have a range of 1 to 0.2 mm. Such a minimum width d1 is between the protrusions 77. The recessed area is the area that can be etched or molded.

[0038] The depth h1 of the first to fourth recesses 61, 62, 63, and 64 is 0.25 mm or more. The optical pattern can also have a range of, for example, 0.25 mm to 0.35 mm. When the upper surface area of ​​section 600 is 100%, the upper surface area of ​​the first pattern section 610 is The upper surface area of ​​the optical pattern portion 600 may be in the range of 40% ± 5%, and the second The upper surface area of ​​the pattern portion 620 is 25% ± 4% of the upper surface area of ​​the optical pattern portion 600. It may be within the range of %, and the upper surface area of ​​the third pattern portion 630 is the optical pattern portion The upper surface area of ​​600 may be in the range of 20% ± 3%, and the fourth pattern portion 640 The upper surface area has a range of 15% ± 3% of the upper surface area of ​​the optical pattern portion 600. It is possible.

[0039] The first example is an optical pattern having a plurality of pattern sections 610, 620, 630, 640. The depth h1 of the n section 600 is made the same, and the position that overlaps with the center of the light-emitting element 300 is used as a reference point. Even if the pattern portion has recesses 61, 62, 63, and 64, it is provided with a width that gradually decreases. Good. As a result, the area adjacent to the light-emitting element 300 has the surface of the recess of the first pattern portion 610. The product is largest, and the area of ​​the concave decreases as the region is farther away, diffusing light in proportion to the light intensity. You can arrange the possible patterns.

[0040] Figures 10 to 12 are diagrams showing the optical pattern section according to the second example.

[0041] Referring to Figures 10 to 12, the optical pattern section 600 is located on top of the resin layer 500. A is such that the maximum length b4 in the second direction Y is greater than the maximum length b3 in the first direction X, for example. For example, the maximum length b4 in the second direction Y is 200% or more greater than the maximum length b3 in the first direction X. For example, it can have a range of 200% to 330%. The maximum length b3 in the first direction X is The length of the light-emitting element 300 may be the same as or greater than k1 (Figure 2). For example, the first method The maximum length b3 of direction X is 3.5 mm or less, for example, even if it is in the range of 2.5 mm to 3.5 mm. Often, the maximum length b4 in the second direction Y is 7 mm or more, for example, in the range of 7 mm to 9 mm. It is possible. The area of ​​the region formed by connecting the outermost patterns of the optical pattern section 600 is The upper surface area of ​​the light-emitting element 300 can be at least one times, for example, in the range of 1 to 3 times. This allows the optical pattern section 600A to be positioned above and in front of the light-emitting element 300. It can cover a wide area and reflect or refract incident light.

[0042] The optical pattern section 600A comprises a plurality of pattern sections 610, 6 arranged in the first direction X. The widths w1 and w2 of 20 may be different. The plurality of pattern sections 610 and 620 are second It is extended in the direction Y. For example, the plurality of pattern portions 610, 620 are all the same depth h. The pitches p1 and p2 between the recesses 62 adjacent to each other in the first and second directions X and Y are the same. It may be one or gradually increasing. Each of the plurality of pattern portions 610, 620 is a recess. The recesses 61, 62 and the protrusions 71, 72 are arranged alternately. The intermediate protrusions 77 between the multiple patterns have a width w1 between them. It is larger than w2 and may be the same width as or larger than at least one of the adjacent protrusions 71. i. The optical pattern section 600A has a first pattern section 610 and a second pattern in the first direction. Section 620 is positioned between the first and second pattern sections 610 and 620, respectively. A protrusion 77 is positioned. Each of the first and second pattern portions 61 and 620 is a recess 6 1, 62 and the protrusions 71, 72 are arranged alternately.

[0043] The first pattern portion 610 includes a plurality of first recesses 61 and a plurality of first protrusions 71, The width w1 of the first recess 61 is greater than the width of the first protrusion 71 located between the first recesses 61. The second pattern portion 620 includes a plurality of second recesses 62 and a plurality of second protrusions 72. The width w2 of the second recess 62 is equal to the width of the second protrusion 72 positioned between the second recesses 62. It's okay if it's quite large.

[0044] With respect to a position that coincides with the center of the light-emitting element 300, the first recess 61 is in the first direction X. And the widths w1 and w2 of the second recess 62 gradually decrease. The first recesses are arranged on both sides in the second direction Y at the center of the optical pattern portion 600A. The widths w1 > w2 of 61 and the second recess 62 gradually decrease. For example, the first and second recesses 6 The widths of 1 and 62 can satisfy the condition w1 > w2. The width w1 is 0.4 The width w2 is less than 0.4 mm, for example, in the range of 0.4 mm to 0.6 mm. For example, it may be in the range of 0.25 mm to 0.39 mm. The width w1 of the first recess 61 is The width w2 of the second recess 62 may be twice or less. The width d1 of the intermediate protrusion 77 is 0 It may be in the range of 0.01 mm to 0.5 mm, and is greater than the width of the first and second protrusions 71 and 72. It may be large. The depth h2 of the first and second recesses 61 and 62 is 0.4 mm or more. It may also have a range of, for example, 0.4 mm to 0.5 mm. The optical pattern When the upper surface area of ​​section 600A is 100%, the upper surface area of ​​the first pattern section 610 is The upper surface area of ​​the optical pattern portion 600A may be in the range of 80% ± 5%, The upper surface area of ​​the second pattern section 620 is 20 times the upper surface area of ​​the optical pattern section 600A. It can have a range of %±4%.

[0045] The second example is an optical pattern section 600A having a plurality of pattern sections 610, 620. The depth h2 is made deeper than the depth h1 of the first example and is the same as the center of the light-emitting element 300. The width may be provided such that it gradually decreases as the distance increases, based on the overlapping position. This causes light emission. In the region adjacent to element 300, the area of ​​the first recess 61 of the pattern portions 610 and 620 is the largest. The larger and farther the region, the smaller the area of ​​the second recess 62 becomes, and the light is diffused in proportion to the light intensity. You can arrange the possible patterns.

[0046] Figures 13 to 15 are diagrams showing the optical pattern section according to the third example.

[0047] Referring to Figures 13 to 15, the optical pattern section 600 is located on top of the resin layer 500. B is such that the maximum length b6 in the second direction Y is greater than the maximum length b5 in the first direction X, for example. For example, the maximum length b6 in the second direction Y is 100% or more greater than the maximum length b5 in the first direction X. For example, it can have a range of 100% to 150%. The maximum length b5 in the first direction X is The length k1 (Figure 2) of the light-emitting element 300 is 80% or more, for example, in the range of 80% to 110%. This is possible. For example, the maximum length b5 in the first direction X is 2.5 mm or less, for example, 1.8 The range may be from mm to 2.5 mm, and the maximum length b6 in the second direction Y is 7 mm or more. For example, it can have a range of 7 mm to 9 mm. The area of ​​the region formed by connecting the outer patterns is 0.5 times or more the upper surface area of ​​the light-emitting element 300. For example, it can have a range of 0.5x to 1.5x. This allows the optical pattern section 600 B covers the upper and front regions of the light-emitting element 300 and reflects the incident light or It can be refracted.

[0048] The optical pattern section 600B comprises a plurality of pattern sections 610, 6 arranged in the first direction X. The widths w1 and w2 of 20 may be different. The plurality of pattern sections 610 and 620 are second It is extended in the direction Y. For example, the plurality of pattern portions 610, 620 are all the same depth h. The 3 is arranged such that the pitch p1 between the recesses 62 adjacent to each other in the first and second directions X and Y is the same. It is also permissible. Each of the plurality of pattern portions 610, 620 consists of recesses 61, 62 and protrusions. The complex includes parts 71 and 72, and the recesses 61 and 62 and the protrusions 71 and 72 are arranged alternately. The intermediate protrusion 77 between the number pattern sections 610 and 620 is one of the adjacent recesses 61 and 62. It is not necessary to have a width w1, but it may be smaller than the width of an adjacent protrusion 71, 72. The optical pattern section 600B has a first pattern section 610 and a second pattern section 6 in the first direction. 20 is positioned, and intermediate protrusions are located between the first and second pattern portions 610 and 620, respectively. 77 is positioned. Each of the first and second pattern sections 610 and 620 is the first and In the second direction, recesses 61, 62 and protrusions 71, 72 are arranged alternately. The first pattern portion 6 10 includes a plurality of first recesses 61 and a plurality of first protrusions 71, wherein the width w1 of the first recess 61 is The width of the first protrusion 71, which is positioned between the first recesses 61, may be greater than the width of the second pattern The n-section 620 includes a plurality of second recesses 62 and a plurality of second protrusions 72, and the second recesses 62 The width w2 may be the same as or different from the width of the second protrusion 72 positioned between the second recesses 62. i. Using the position that coincides with the center of the light-emitting element 300 as a reference, the first recess 6 in the first direction X The widths w1 and w2 of the first and second recesses 62 gradually decrease. They coincide with the center of the light-emitting element 300. The first recesses are arranged on both sides in the second direction Y at the center of the position or optical pattern portion 600B. The widths w1 > w2 of section 61 and the second recess 62 gradually decrease. For example, the first and second recesses. The widths of 61 and 62 can satisfy the condition w1 > w2. The width w1 is 0. The width w2 is 4 mm or more, for example, in the range of 0.4 mm to 0.6 mm, and the width w2 is less than 0.4 mm. For example, it may be in the range of 0.25 mm to 0.39 mm. The width w1 of the first recess 61 is The width w2 of the second recess 62 may be twice or less. The width d1 of the intermediate protrusion 77 is The width may be in the range of 0.01 mm to 0.5 mm, and the width of the first and second protrusions 71 and 72 The size can be large.

[0049] The depth h3 of the first and second recesses 61 and 62 may be 0.55 mm or more, for example. For example, it can have a range of 0.55 mm to 0.65 mm. The optical pattern portion 600 When the upper surface area of ​​B is 100%, the upper surface area of ​​the first pattern portion 610 is the optical pattern portion The upper surface area of ​​the turn section 600B may be in the range of 85% ± 5%, and the second pattern The upper surface area of ​​section 620 is 15% ± 4% of the upper surface area of ​​the optical pattern section 600B. It can have a range.

[0050] The third example is an optical pattern section 600B having a plurality of pattern sections 610, 620. The depth h3 is made deeper than the depth h2 of the second example and the same as the center of the light-emitting element 300. The width may be provided such that it gradually decreases as the distance increases, based on the overlapping position. This causes light emission. In the region adjacent to element 300, the area of ​​the first recess 61 of the pattern portions 610 and 620 is the largest. The area of ​​the second recess 62, which is located in a large, distant region, decreases in proportion to the light intensity. A pattern that can diffuse can be arranged.

[0051] Figures 16 and 17 are diagrams showing the optical pattern section according to the fourth example.

[0052] Referring to Figures 2, 16, and 17, the optical pattern section 600C is the maximum in the second direction Y. Length b2 may be greater than the maximum length b1 in the first direction X, for example, the maximum length in the second direction Y The length b2 is 120% or more of the maximum length b1 in the first direction X, for example, 120% to 180%. It can have a range of the outermost pattern of the optical pattern section 600C connected The area of ​​the region is six times or more the upper surface area of ​​the light-emitting element 300, for example, in the range of 6 to 18 times. It can have. As a result, the optical pattern portion 600C is the upper part of the light-emitting element 300 It can also cover the area in front of it and reflect or refract incident light.

[0053] The optical pattern section 600C comprises a plurality of pattern sections 610, 6 arranged in the first direction X. The widths w1, w2, w3, and w4 of 20, 630, and 640 may be different. The parts 610, 620, 630, and 640 are extended in a second direction. For example, the multiple parts The turning sections 610, 620, 630, and 640 have different depths h1, h2, h3, and h4. The recesses 62 are arranged in such a way that the pitches P1, P2, P3, and P4 are between adjacent recesses 62 in the first and second directions. They may be different from each other.

[0054] Each of the aforementioned multiple pattern portions 610, 620, 630, and 640 is a recess 61, 62 , 63, 64 and protrusions 71, 72, 73, 74, the recesses 61, 62, 63, 64 The convex portions 71, 72, 73, and 74 are arranged alternately. The plurality of pattern portions 610, 62 The intermediate protrusions 77, 78, and 79 between 0, 630, and 640 are adjacent to the first and second recesses 61 , having widths d1, d2, and d3 smaller than widths w1 and w2 of 62, adjacent third and fourth recesses Parts 63 and 64 may have widths d1, d2, and d3 that are larger than the widths w3 and w4. The widths d1, d2, d3 of the intermediate protrusions 77, 78, 79 are the first and second pattern sections 610. The width d1 of the first intermediate protrusion 77 between 620 is smallest, and the third and fourth pattern sections 630, The width d3 of the third intermediate protrusion 79 between 640 may be the largest. Such a configuration is a recess. The widths w1, w2, w3, w4 and pitches P1, P2, P3, P4 of 61, 62, 63, 64 are Taking this into consideration, the widths d1, d2, and d3 of the intermediate protrusions 77, 78, and 79 can be set.

[0055] The optical pattern section 600C has a first pattern section 610 and a second pattern section in the first direction X. The third pattern section 630 and the fourth pattern section 640 are arranged in that order, and the second direction Y On both sides are the first pattern section 610, the second pattern section 620, the third pattern section 630 and the fourth pattern section The turn section 640 is arranged in that order. The first to fourth pattern sections 610, 620, 630, Intermediate protrusions 77, 78, and 79 are positioned between each of the 640. The first to fourth putters Each of the n section 610, 620, 630, and 640 has a recess 61 in the first and second directions X and Y. , 62, 63, 64 and the convex portions 71, 72, 73, 74 are arranged alternately. The first putter The n portion 610 includes a plurality of first recesses 61 and a plurality of first protrusions 71, and the width of the first recess 61 w1 may be greater than the width of the first protrusion 71 positioned between the first recesses 61. The second pattern section 620 includes a plurality of second recesses 62 and a plurality of second protrusions 72, and the second recess The width w2 of the second recess 62 may be larger than the width of the second protrusion 72 disposed between the second recesses 62. .

[0056] The third pattern portion 630 includes a plurality of third recesses 63 and a plurality of third protrusions 73, and the width w3 of the third recess 63 may be smaller than the width of the third protrusion 73 disposed between the third recesses 63. The fourth pattern portion 640 includes a plurality of fourth recesses 64 and at least one fourth protrusion 74, and the width w4 of the fourth recess 64 may be smaller than the width of the fourth protrusion 74 disposed between the fourth recesses 64.

[0057] Based on the position overlapping the center of the light-emitting element 300, the widths w1, w2, w3, w4 of the first recess to the fourth recesses 61, 62, 63, 64 gradually decrease as they move farther in the first direction X. Based on the position overlapping the center of the light-emitting element 300 or the center of the optical pattern portion 600C, the widths w1, w2, w3, w4 of the first recess to the fourth recesses 61, 62, 63, 64 gradually decrease as they move farther away from both sides in the second direction Y. For example, the respective widths of the first to fourth recesses 61, 62, 63, 6 4 can satisfy w1>w2>w3>w4. The width w1 is 0.4 mm or more, for example, in the range of 0.4 mm to 0.6 mm, and the width w2 is less than 0.4 mm, for example, in the range of 0.32 mm to 0.39 mm, the width w3 is 0.3 mm or less, for example in the range of 0.29 mm to 0.38 mm, and the width w4 may be 0.2 mm or more, for example 0. 2 mm to 0.28 mm. The width w1 of the first recess may be at least twice the width w4 of the fourth recess. The widths d1, d2, d3 of the intermediate protrusions 77, 78, 79 can satisfy d1<d2<d3, and are at least 0.01 mm and at most 0.5 mm. It may be less than or equal to mm. That is, the maximum width d3 is in the range of 0.4 mm to 0.5 mm, and The small width d1 may be in the range of 0.01 to 0.2 mm. Such a minimum width d1 is the protrusion. The area between 77 is the range in which recesses can be etched or formed. The first to fourth recesses 61, Depths h1, h2, h3 of 62, 63, 64 are the third or fourth recess depth h1 of 63, 64 These are either identical to each other, or the third recess 63 may be deeper. Third or fourth recess 63, 6 The depth h1 of 4 may be smaller than the depths h3 and h2 of the first and second recesses 61 and 62. The depth h3 of the first recess 61 may be greater than the depth h2 of the second recess 62.

[0058] Using the position that coincides with the center of the light-emitting element 300 as a reference, the further away it is in the first direction X, the greater the The depths h3, h2, h1 of the first to fourth recesses 61, 62, 63, and 64 gradually decrease. From a position that coincides with the center of the optical element 300 or from the center of the optical pattern portion 600C, in the second direction Y The depths h3, h2 of the first to fourth recesses 61, 62, 63, and 64 increase as they move further away from the sides. h1 gradually decreases. The depth h1 of the third and fourth recesses 63 and 64 is 0.25 mm or more. It may be present, for example, it can be in the range of 0.25 mm to 0.35 mm. The second The depth h2 of the recess 62 may be 0.4 mm or more, for example, 0.4 mm to 0.5 mm. It can have a range. The depth h3 of the first recess 61 is 0.55 mm or more. The optical pattern can also have a range of, for example, 0.55 mm to 0.65 mm. When the upper surface area of ​​section 600 is 100%, the upper surface area of ​​the first pattern section 610 is The upper surface area of ​​the recording optical pattern section 600C may be in the range of 40% ± 5%, and the above The upper surface area of ​​the second pattern section 620 is 25% of the upper surface area of ​​the optical pattern section 600C. The range may be ±4%, and the upper surface area of ​​the third pattern portion 630 is the optical pattern The upper surface area of ​​the n portion 600C may be in the range of 20% ± 3%, and the fourth pattern portion The upper surface area of ​​640 is within a range of 15% ± 3% of the upper surface area of ​​the optical pattern section 600C. It can have.

[0059] The fourth example is an optical pattern having a plurality of pattern sections 610, 620, 630, 640. The deepest point of section 600C is where depths h1, h2, and h3 coincide with the center of the light-emitting element 300. The depth is provided, gradually decreasing as the distance increases, and the position overlapping with the center of the light-emitting element 300 is used as a reference. The width may be provided such that it gradually decreases as it gets further away. This allows adjacent to the light-emitting element 300 In this region, the area and depth of the recess 61 of the first pattern portion 610 are the largest, and the furthest recess is The area and depth decrease as the light intensity increases, and a pattern is arranged that diffuses light in proportion to the light intensity. It is possible.

[0060] Here, we have a structure without an optical pattern (comparative example) and a structure with an optical pattern as in the first to third examples of the invention. Table 1 shows an example of an experiment comparing the brightness of modules with a luminance section. [Table 1]

[0061] As shown in the experimental example above, the brightness of the comparative example without an optical pattern was lowest at the maximum value, and then intermediate. Since the value is the lowest, the incident light undergoes total internal reflection and propagates into the resin layer. In one example, the brightness increases as the maximum and intermediate values ​​increase, representing the amount of total internal reflection by the optical pattern. It can be seen that this has the effect of reducing and the light extraction efficiency is also improved. The brightness of the second example is that the maximum value is The amount of light emitted increases across the entire region. In the third example, the maximum brightness increases across the entire region. The amount of light emitted increases. This causes a separate shielding to be applied to the resin layer having the optical pattern. Even without arranging optical components, the uniformity of light is improved, and the transmission of light refracted on the optical pattern is improved. It is possible to increase the amount of excess.

[0062] Figures 18(a), (b), and (c) show the directional distribution of light for the first to third examples, and (d) shows the optical pattern This diagram shows the light directional distribution of a comparative example without a light source. Here, water passing through the center of the light-emitting element... The luminous intensity (flux) distribution was measured at an angle of 35 degrees relative to the horizontal direction. Looking at the luminous intensity, Figures 18(a), (b), and (c) show that detection is possible at 24 cd or higher, and (d) shows 20. Assuming a reading of approximately 5 cd, it can be seen that the detection level is lower than that of the example in the invention.

[0063] Figure 19 is a plan view of a vehicle to which the lighting device according to an embodiment of the invention is applied, and Figure 20 This is a diagram showing an example of the taillights of the vehicle in Figure 19.

[0064] Referring to Figures 19 and 20, in the moving body or vehicle 900, the front ramp 850 It may include one or more lighting modules, and the drive timing of these lighting modules may be set individually It is controlled separately, and in addition to functioning as a normal headlight, the driver can open the vehicle door. If opened, it will have effects such as welcome lights or celebration effects. It can even provide additional functions. The lamp can function as a daytime running light, high beam, and - Can be applied to beams, fog lamps or turn signals. The taillight 800 consists of multiple lamp units 810, 81 supported by a housing. 2, 814, and 816 are arranged. For example, the lamp units 810, 812, and 814 ,816 is the first lamp unit 810 located on the outside, the first lamp unit 81 A second lamp unit 814 is arranged around the inside of 0, the second lamp unit 814 It may include third and fourth lamp units 814, 816, respectively, located on the inside. The first to fourth lamp units 810, 812, 814, and 816 are disclosed in the embodiments. The lighting device can be selectively applied, and the lamp unit can be placed outside the lighting device. Red lens cover or white lens for the illumination characteristics of 810, 812, 814, and 816. A cover may be placed. Such lamp units 810, 812, 814, 8 The lighting device disclosed in the embodiment applied to 16 can emit surface light with a uniform distribution. The first and second lamp units 810 and 812 have curved shapes, straight shapes, and angular shapes. A structure having at least one of the following shapes: a flat shape, an inclined shape, or a planar shape, or a combination thereof. The first and second lamp units 810 and 812 may be provided one for each taillight. Or multiple units may be arranged. The first lamp unit 810 is provided as a taillight, and The second lamp unit 812 is provided as a brake light, and the third lamp unit 814 is a Provided as a pickup lamp, the fourth lamp unit 816 is a turn signal lamp It may be provided as a lamp. Such lighting lamps emit more light in the rear direction than in the side direction. It can provide a suitable degree of illumination and complies with regulations regarding the light distribution of stop lamps or taillights.

[0065] The features, structures, and effects described in the above embodiments are described in at least one embodiment of the present invention. The following are included and are not necessarily limited to a single embodiment. Furthermore, the specifics illustrated in each embodiment are not limited to a single embodiment. Characteristics, structure, effects, etc., are described by a person with ordinary skill in the art to which the examples belong, as described in other examples. It can be implemented by combining or modifying the following. Therefore, regarding such combinations and modifications The contents should be interpreted as being within the scope of the present invention. Furthermore, the above examples are described in part. As explained in mind, this is merely an example and does not limit the present invention. Anyone with ordinary knowledge in the relevant field can understand this within the scope of the essential characteristics of this embodiment. Within this framework, a wide variety of modifications and applications not exemplified above are possible. For example, see the examples below. Each component presented can be modified and implemented. And such modifications and Any differences relating to applications shall be construed as being within the scope of the present invention as defined in the attached claims. It should be done.

Claims

1. circuit board and A reflective member placed on the substrate, A plurality of light-emitting elements arranged on the substrate, A resin layer placed on the reflective member, The optical pattern portion includes a plurality of recesses formed in a concave shape on the upper surface of the resin layer, The plurality of light-emitting elements are spaced apart in the first direction from which light is emitted. The optical pattern portion is positioned from a position overlapping with the center of each of the plurality of light-emitting elements in the first direction. It includes a pattern portion in which the width of the recess decreases in that direction, The optical pattern portion has widths of the recesses on both sides in the second direction from the center of the optical pattern portion. A lighting device including a pattern section where the light decreases.

2. The pattern portion of the optical pattern portion includes two or more pattern portions, Each of the two or more pattern portions comprises a plurality of recesses arranged in the first and second directions. The lighting device according to claim 1, having the following features.

3. Each of the two or more pattern portions includes a protrusion between the plurality of recesses, claim 2 The lighting device described above.

4. Of the two or more pattern portions, the first pattern portion adjacent to each of the light-emitting elements is The lighting device according to claim 3, wherein the width of the recess is greater than the width of the protrusion.

5. Of the two or more pattern portions, the second pattern is the one that is furthest from the center of the light-emitting element. The lighting device according to claim 3, wherein the width of the recess is the same as or smaller than the width of the protrusion.

6. The plurality of recesses arranged in the optical pattern portion have the same depth as each other, according to the claim. A lighting device as described in any one of items 1 to 5.

7. The plurality of recesses arranged in the optical pattern portion have different depths from each other. The depth of the recess is greatest in the recess of the first pattern portion located at the top of the light-emitting element. The depth of the recess in the second pattern portion, which is arranged on the outer casing of the optical pattern portion, is smallest. The lighting device according to any one of claims 1 to 5.

8. The recess is a polygonal prism or a prism with a curved surface at the bottom, as per any of claims 1 to 5. A lighting device as described in item 1.

9. The optical pattern portion has a maximum length in the first direction that is smaller than the maximum length in the second direction. or the lighting device according to any one of claims 1 to 5.

10. The optical pattern section is positioned above each of the light-emitting elements, The area of ​​the optical pattern portion is in the range of 6 to 18 times the area of ​​the light-emitting element, claim. A lighting device as described in any one of items 1 to 5.

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