Lighting devices and lamps including them

Abstract

An illumination device according to an embodiment includes a sensor, a substrate disposed on the sensor and including an electrode pattern, a light source disposed on the substrate and electrically connected to the electrode pattern, a resin layer disposed on the substrate, and a reflective layer disposed between the substrate and the resin layer and having a plurality of reflective pattern groups, wherein the substrate includes a first region overlapping the sensor in a first direction perpendicular to the top surface of the substrate and a second region surrounding the first region, the light source is disposed on the second region, the plurality of reflective pattern groups are disposed on the first region, and the sensor does not overlap the light source and the electrode pattern in the first direction.

Description

Technical Field

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

Background Art

[0002] Lighting is used in various fields as a device that can supply light or adjust the amount of light. For example, lighting devices can be applied to various fields such as vehicles and buildings to brighten the inside or outside. In particular, recently, light-emitting elements are used as light sources for lighting. Such light-emitting elements, for example, 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. Such light-emitting diodes are applied to various optical assemblies such as various display devices, indoor lights, or outdoor lights.

[0003] Generally, various colors and shapes of lamps are applied to vehicles, and recently, lamps adopting light-emitting diodes as vehicle light sources have been proposed. As an example, light-emitting diodes are applied to vehicle headlights, taillights, direction indicator lights, etc. However, such light-emitting diodes have a problem that the emission angle of the emitted light is relatively small. Thus, when using a light-emitting diode as a vehicle lamp, there is a requirement regarding an increase in the light-emitting area of the lamp.

[0004] A logo or emblem, which has a phrase or shape symbolizing the vehicle's manufacturer or brand, is placed at the front of the vehicle, and recently, research has been conducted on applying lamps to such logos and emblems. Such logos and emblems are generally located at the front of the vehicle, for example, on the radiator grille. However, when lamps are applied to such logos, there is a problem of interference with the sensing sensors located at the front of the vehicle. Specifically, sensing sensors, including radar or lidar, are placed at the front of the vehicle to detect objects located in front. In this case, if the logo lamp is placed adjacent to or overlapping with the sensing sensor, the signal emitted from the sensing sensor may be interfered with by the components included in the lamp. This makes it difficult to effectively detect objects located in front, and thus prevents effective information from being provided to the occupants of the vehicle.

[0005] When a lamp includes a light-emitting diode, a problem arises where a hot spot phenomenon occurs, where light is concentrated in the area emitted from the light-emitting diode. In this case, when a linear or surface light source is realized using the lamp, a problem arises where the uniformity characteristics of the light-emitting surface are reduced. Therefore, a new lighting device and lamp that can solve the above-mentioned problems are required. [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] The embodiments aim to provide lighting devices and lamps having improved luminous intensity. The embodiments aim to provide lighting devices and lamps that can embody a uniform linear or surface light source. The embodiments aim to provide lighting devices and lamps that can prevent interference with sensors. [Means for solving the problem]

[0007] The lighting device according to the embodiment includes a sensor, a substrate disposed on the sensor and including an electrode pattern, a light source disposed on the substrate and electrically connected to the electrode pattern, a resin layer disposed on the substrate, and a reflective layer disposed between the substrate and the resin layer and having a plurality of reflective pattern groups, wherein the substrate includes a first region overlapping the sensor in a first direction perpendicular to the upper surface of the substrate and a second region surrounding the first region, the light source is disposed on the second region, the plurality of reflective pattern groups are disposed on the first region, and the sensor does not overlap the light source and the electrode pattern in the first direction.

[0008] According to embodiments of the invention, each of the plurality of reflection pattern groups may include a plurality of unit reflection patterns. The second region includes a 2-1 region on which the light source is located and a 2-2 region located between the first region and the 2-1 region, and the plurality of unit reflection patterns are further arranged on the 2-2 region. The maximum spacing between the plurality of unit reflection patterns arranged on the first region may be smaller than the maximum spacing between the plurality of unit reflection patterns arranged on the 2-2 region. The size of the plurality of unit reflection patterns arranged on the first region may be larger than the size of the plurality of unit reflection patterns arranged on the 2-2 region.

[0009] According to an embodiment of the invention, the plurality of unit reflection patterns do not overlap with the 2-1 region and the first direction.

[0010] The lighting device according to the embodiment includes a sensor, a substrate disposed on the sensor and including an electrode pattern, a light source disposed on the substrate and electrically connected to the electrode pattern, a resin layer disposed on the substrate, and a reflective layer disposed between the substrate and the resin layer and having a plurality of unit reflection patterns, wherein the substrate includes a first region including the center of the substrate and a second region including the edge of the substrate, the light source includes first and second light-emitting elements disposed on the second region and arranged correspondingly to each other with respect to the center of the substrate, and emitting light toward the center of the substrate, a portion of the plurality of unit reflection patterns overlapping with the first and second light-emitting elements in a second direction defined as horizontal, the plurality of unit reflection patterns being disposed on the first region, the sensor overlapping with the first region in a first direction perpendicular to the second direction and not overlapping with the electrode pattern in the first direction.

[0011] According to an embodiment of the invention, the light source may include a plurality of light-emitting elements arranged at regular intervals along the edge of the substrate. The light source includes a light-emitting group defined by a pair of light-emitting elements whose light-emitting surfaces face each other, and at least one light-emitting group is arranged on the substrate. The plurality of light-emitting elements are arranged along a virtual line forming a polygon, a circle, or an ellipse.

[0012] The lighting device according to the embodiment includes a sensor, a substrate disposed on the sensor and including an electrode pattern, a light source disposed on the substrate and electrically connected to the electrode pattern, a resin layer disposed on the substrate, and a reflective layer disposed between the substrate and the resin layer, wherein the reflective layer includes first to third reflective pattern groups arranged along virtual first to third lines having a polygonal, circular, or elliptical shape, the second line being located inside the first line, the third line being located inside the second line, the minimum distance between the first and second reflective pattern groups being greater than the minimum distance between the second and third reflective pattern groups, and the sensor not overlapping perpendicularly with the electrode pattern and the light source.

[0013] According to embodiments of the invention, the first reflection pattern group may include a plurality of first unit reflection patterns arranged along the first line, the second reflection pattern group may include a plurality of second unit reflection patterns arranged along the second line, and the third reflection pattern group may include a plurality of third unit reflection patterns arranged along the third line.

[0014] According to embodiments of the invention, the size of the first unit reflection pattern may be smaller than the size of the second unit reflection pattern, and the size of the second unit reflection pattern may be smaller than the size of the third unit reflection pattern. The density of the third unit reflection pattern included in the third reflection pattern group may be greater than the density of the second unit reflection pattern included in the second reflection pattern group, and the density of the second unit reflection pattern included in the second reflection pattern group may be greater than the density of the second unit reflection pattern included in the first reflection pattern group. The distance between the plurality of first reflection patterns from the center of the substrate may be constant or vary along the clockwise direction. The light source may not be placed in the first region. The reflective layer includes an optical sheet, and the plurality of unit reflection patterns may not be placed on the optical sheet. The optical member is placed on the resin layer and includes a transparent region and an opaque region, and the optical member is separated from the resin layer.

[0015] According to an embodiment of the invention, the separation distance between the substrate and the sensor may be greater than the separation distance between the resin layer and the optical member. The invention includes a light-shielding layer disposed on the resin layer, the light-shielding layer includes a first substrate and a light-shielding pattern disposed on the first substrate, and a portion of the light-shielding pattern may overlap perpendicularly with the light source.

[0016] The lighting device according to the embodiment includes a sensor, a substrate spaced apart from the sensor and including an electrode pattern, a light source disposed on the substrate and electrically connected to the electrode pattern, a resin layer disposed on the substrate, and a light-shielding layer disposed on the resin layer and including a light-shielding pattern, wherein, with reference to a first direction perpendicular to the upper surface of the substrate, the sensor overlaps with the substrate and the resin layer, but does not overlap with the electrode pattern, the light source, and the light-shielding pattern.

[0017] According to an embodiment of the invention, the light source includes a plurality of light-emitting elements arranged in the edge region of the substrate, and includes a light-emitting group defined by a pair of light-emitting elements whose light-emitting surfaces face each other, and the plurality of light-emitting groups are arranged on the substrate. A pair of light-emitting elements included in one light-emitting group selected from the plurality of light-emitting groups are separated by a first distance, and a single light-emitting element included in a different light-emitting group from one of the light-emitting elements is separated by a second distance, the first distance may be greater than the second distance.

[0018] According to an embodiment of the invention, the invention includes a housing disposed between the sensor and the substrate, and a reflective layer disposed between the housing and the resin layer, having a plurality of unit reflection patterns, wherein the substrate includes an opening penetrating its upper and lower surfaces, the opening being formed in a central region of the substrate overlapping the sensor in the first direction, and the reflective layer being disposed on the housing corresponding to the opening. The upper surface of the reflective layer is located below the upper surface of the substrate. [Effects of the Invention]

[0019] The lighting device and lamp according to the embodiment can effectively detect objects using a sensor while simultaneously providing uniform light. Specifically, the lighting device includes a light source module positioned to overlap with the sensor, and the light source module can be positioned so as not to overlap with the sensor, thereby preventing interference with the sensor from occurring. This allows the lighting device to simultaneously emit light and detect objects using the sensor, and prevents the sensor from being interfered with by the light source module, which would reduce the accuracy of the detection.

[0020] The lighting device and lamp can have improved optical characteristics. Specifically, the lighting device and lamp include a reflective layer comprising a plurality of unit reflection patterns, the plurality of unit reflection patterns being arranged with set characteristics such as position, width, spacing, pitch spacing and density. As a result, the reflective layer can effectively reflect light emitted from the light source, minimizing light loss and providing a linear or surface light source with uniform brightness in the upward direction.

[0021] The aforementioned lighting device and lamp can improve the uniformity characteristics of the brightness of the emitted light. Specifically, the lighting device includes a light-shielding layer, and the light-shielding layer may include a light-shielding pattern that is placed in a region where light emitted from the light source is concentrated. In this case, the light-shielding pattern is placed in a set shape at a set position, and the light-shielding layer can prevent the occurrence of a hot spot phenomenon. Therefore, the lighting device and lamp according to the embodiment can provide a linear or surface light source with uniform brightness of emitted light. [Brief explanation of the drawing]

[0022] [Figure 1] This is a cross-sectional view of the lighting device according to the embodiment. [Figure 2] This is a plan view of the light source module of the lighting device according to the embodiment. [Figure 3]It is a cross-sectional view for explaining the arrangement relationship of unit reflection patterns in the light source module according to the embodiment. [Figure 4] It is another cross-sectional view for explaining the arrangement relationship of unit reflection patterns in the light source module according to the embodiment. [Figure 5] It is another cross-sectional view for explaining the arrangement relationship of unit reflection patterns in the light source module according to the embodiment. [Figure 6] It is another cross-sectional view for explaining the arrangement relationship of unit reflection patterns in the light source module according to the embodiment. [Figure 7] It is a drawing for explaining various forms of the light source module according to the embodiment. [Figure 8] It is a drawing for explaining various forms of the light source module according to the embodiment. [Figure 9] It is a drawing for explaining various forms of the light source module according to the embodiment. [Figure 10] It is a plan view for explaining another arrangement relationship of unit reflection patterns in the light source module according to the embodiment. [Figure 11] It is a plan view for explaining another arrangement relationship of light sources in the light source module according to the embodiment. [Figure 12] It is another cross-sectional view of the lighting device according to the embodiment. [Figure 13] It is another cross-sectional view of the lighting device according to the embodiment. [Figure 14] It is a drawing illustrating an example in which a lamp including the lighting device according to the embodiment is applied to a vehicle. [Figure 15] It is a drawing illustrating an example in which a lamp including the lighting device according to the embodiment is applied to a vehicle. [Figure 16] It is a drawing illustrating an example in which a lamp including the lighting device according to the embodiment is applied to a vehicle. [Figure 17] It is a drawing illustrating an example in which a lamp including the lighting device according to the embodiment is applied to a vehicle.

Modes for Carrying Out the Invention

[0023] Preferred embodiments of the invention will be described in detail below with reference to the attached drawings.

[0024] The technical concept of the present invention is not limited to the embodiments described, but can be embodied in a variety of forms, and within the scope of the technical concept of the present invention, components between embodiments can be selectively combined or substituted. Furthermore, unless explicitly specified, terms used in the embodiments of the present invention (including technical and scientific terms) shall be interpreted as having a meaning generally understood by a person with ordinary skill in the art to which the present invention belongs, and commonly used terms, such as those defined in dictionaries, may be interpreted considering their meaning in the context of the technology concerned. In addition, the terms used in the embodiments of the present invention are for the purpose of describing the embodiments and are not intended to limit the present invention. In this specification, singular forms may 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 may include one or more of all possible combinations of A, B, and C. Furthermore, terms such as 1st, 2nd, A, B, (a), (b), etc., may be used in the description of the components of the embodiments of the present invention. Such terms are for the purpose of distinguishing a component from other components, and the terms do not limit the nature or order of the component. Furthermore, when it is stated that one component is “connected,” “joined,” or “connected” to another component, this includes both cases where the component is directly connected or connected to the other component, and cases where other components are “connected,” “joined,” or “connected” between each component. Also, when it is stated that a component is formed or positioned “above or below” each component, “above or below” includes not only cases where two components are in direct contact, but also cases where one or more other components are formed or positioned between the two components. Moreover, when expressed as “above or below,” it can mean not only the upward direction but also the downward direction, with respect to one component.

[0025] The lighting device according to the invention can be applied to a variety of lamp devices requiring illumination, such as vehicle lamps, household optical assemblies, and industrial optical assemblies. For example, when applied to vehicle lamps, it can be applied to 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, logo lamps, emblem lamps, etc. Also, when applied to vehicle lamps, it can be applied to rear-side auxiliary systems (BSDs) positioned on side mirrors or A-pillars. Furthermore, the optical assemblies of the present invention can be applied to indoor and outdoor advertising devices, display devices, and various railway fields, and can also be applied to all lighting-related fields and advertising-related fields that are currently under development and commercialized, or that can be realized through future technological advancements. Before describing embodiments of the invention, the first direction can mean the direction perpendicular to the z-axis direction shown in the drawings. Furthermore, the second direction can mean the horizontal direction including the x and y axes, as it is perpendicular to the z-axis as shown in the drawing.

[0026] Figure 1 is a cross-sectional view of the lighting device according to the embodiment, and Figure 2 is a plan view of the light source module of the lighting device according to the embodiment. Figure 3 is a cross-sectional view illustrating the arrangement relationship of the unit reflection patterns in the light source module according to the embodiment.

[0027] Referring to Figures 1 to 3, the lighting device 1000 according to the embodiment may include a sensor 10 and a light source module. The sensor 10 can sense objects. For example, the sensor 10 may include radar or lidar. The sensor 10 can emit a signal of a set angle and intensity toward the front of the sensor 10. The sensor 10 can also receive the emitted signal. That is, the sensor 10 is a sensing sensor that can acquire information toward the front of the sensor 10 based on the sensed signal. Such a sensor 10 is provided in the lighting device 1000 as at least one sensor and is provided in at least one module including the sensor 10. The light source module is arranged on the sensor 10. More specifically, the light source module is arranged in a region that overlaps the sensor 10 and the upper surface of the substrate 100 in a first direction which is perpendicular to the direction. The light source module is arranged on the path through which the signal emitted from the sensor 10 travels.

[0028] The light source module can be separated from the sensor 10. For example, the light source module can be separated from the sensor 10 in a first direction (vertical direction; z-axis direction). The separation of the sensor 10 and the light source module creates a first gap B1 between the two components. The first gap B1 may be air or a vacuum. The light source module can be separated from the sensor 10 by a first height h1. Here, the first height h1 may be the distance between the upper surface of the sensor 10 facing the light source module and the lower surface of the substrate 100 of the light source module. The first height h1 may be approximately 60 mm or more. More specifically, the first height h1 may be approximately 80 mm or more. If the first height h1 is less than approximately 60 mm, the signal emitted from the sensor 10 may be interfered with by the light source module during the process of being provided to the outside. In other words, if the height of the first gap B1 formed between the sensor 10 and the light source module is too small, the light source module may induce interference with the signal of the sensor 10, thereby significantly reducing the reliability of the sensor 10. Preferably, to prevent interference with the signal of the sensor 10 and to allow for effective light emission from the light source module, the first height h1 may be approximately 100 mm or more.

[0029] The light source module may include a substrate 100, a light source 200, a reflective layer 300, and a resin layer 400. The light source module can emit light from the light source 200 as a line light source or a surface light source. The substrate 100 may include a material that allows the signal emitted from the sensor 10 to pass through. More specifically, the substrate 100 may include a material that allows electromagnetic waves emitted from the sensor 10 to pass through and prevents or minimizes attenuation, distortion, etc., of the electromagnetic waves. As an example, the substrate 100 may include at least one of PET (Polyethylene terephthalate), PS (Polystyrene), PI (Polyimide), PEN (Polyethylene naphthalate), PC (Poly carbonate), PMI (Polymethacrylimide), PP (Polypropylene), PVC (Polyvinyl chloride), PDMS (Polydimethylsiloxane), and PTFE (Polytetrafluoroethylene).

[0030] The substrate 100 can have a thickness of approximately 30 μm to approximately 300 μm. If the substrate 100 has a thickness of less than approximately 30 μm, it becomes difficult to effectively support the components placed on the substrate 100, such as the light-emitting element 200, and the weight of the light-emitting element 200 may cause a region of the substrate 100 on which the light-emitting element 200 is placed to sag. This reduces the reliability of the substrate 100 and may cause alignment problems of the light-emitting element 200 placed on the substrate 100. Also, if the thickness of the substrate 100 exceeds approximately 300 μm, the overall thickness of the lighting device 1000 increases, and the flexibility of the substrate 100 decreases. The substrate 100 can have a variety of shapes. For example, the substrate 100 can have a variety of shapes such as polygons, circles, and ellipses. The substrate 100 can have a shape that corresponds to the lighting device 1000. Also, the substrate 100 can have a shape that corresponds to the optical member 700, which will be described later.

[0031] The substrate 100 may include multiple regions. For example, the substrate 100 may include a first region R1 and a second region R2. The first region R1 is the region containing the center CP of the substrate 100. The first region R1 is the central region of the substrate 100. The sensor 10 may overlap the first region R1 of the substrate 100 in a first direction (vertical direction; z-axis direction). The second region R2 is the region arranged around the first region R1. The second region R2 is the edge region of the substrate 100. The second region R2 is the region surrounding the first region R1, excluding the first region R1 of the substrate 100. The second region R2 is the region that does not overlap the sensor 10 in a first direction. The second region R2 may include multiple sub-regions. For example, the second region R2 may include a second-first region R2-1 and a second-second region R2-2 as sub-regions. The 2-1 region R2-1 is the edge region of the substrate 100. The 2-1 region R2-1 is the outermost region of the 2 region R2. The 2-1 region R2-1 is the region where the light source 200 is located. The 2-2 region R2-2 is the region located between the 1 region R1 and the 2-1 region R2-1. The 2-2 region R2-2 is the region more adjacent to the center CP of the substrate 100 than the 2-1 region R2-1. The 2-2 region R2-2 surrounds the 1 region R1, and the 2-1 region R2-1 surrounds the 2-2 region R2-2.

[0032] The substrate 100 may include an electrode pattern 150. The electrode pattern 150 is positioned on the upper surface of the substrate 100. More specifically, the electrode pattern 150 is positioned on the upper surface of the substrate 100 facing the resin layer 400.

[0033] The electrode pattern 150 may include a conductive material. For example, the electrode pattern 150 may include at least one of aluminum (Al), copper (Cu), silver (Ag), gold (Au), chromium (Cr), nickel (Ni), molybdenum (Mo), titanium (Ti) and their alloys, carbon, or conductive polymers. The electrode pattern 150 may include at least one of transparent conductive materials, such as ITO (indium tin oxide), IZO (indium zinc oxide), IZTO (indium zinc tin oxide), IAZO (indium aluminum zinc oxide), IGZO (indium gallium zinc oxide), IGTO (indium gallium tin oxide), AZO (aluminum zinc oxide), ATO (antimony tin oxide), or GZO (gallium zinc oxide). The electrode pattern 150 is placed on the second region R2 of the substrate 100. More specifically, the electrode pattern 150 is provided in a region that overlaps with the second region R2 of the substrate 100 in a first direction, and can supply power to the light source 200 which is placed on the second region R2. Furthermore, the electrode pattern 150 does not overlap with the first region R1 of the substrate 100 in a first direction. That is, the electrode pattern 150 is placed only on the second region R2 and does not overlap with the sensor 10 in a first direction.

[0034] The light source 200 is placed on the substrate 100. The light source 200 is placed on the upper surface of the substrate 100. The light source 200 is placed on the substrate 100 above the second region R2. More specifically, the light source 200 is placed on the second-first region R2-1 of the substrate 100. The light source 200 is placed on the electrode pattern 150 placed above the second region R2 and is electrically connected to the electrode pattern 150. The light source 200 does not overlap with the first region R1 in the first direction. That is, the light source 200 is not placed above the first region R1 and does not overlap with the sensor 10 in the first direction.

[0035] The light source 200 may include a plurality of light-emitting elements. The light-emitting elements may include a package in which light-emitting chips are packaged as elements having light-emitting diodes (LEDs). The light-emitting chips may emit at least one of blue, red, green, ultraviolet (UV), and infrared light, and the light-emitting elements may emit at least one of blue, red, green, and infrared light. The light-emitting elements may be of a side-view type in which the bottom portion is connected to the electrode pattern 150. That is, the light-emitting surface 205 of the light-emitting element may face the side of the lighting device 1000. Also, the optical axis of the light-emitting element may be parallel to the top surface of the substrate 100. The plurality of light-emitting elements are arranged along the edge of the substrate 100. As an example, the plurality of light-emitting elements are arranged on a virtual line that forms a polygon, circle, or ellipse with the center CP of the substrate 100 as the center point. The plurality of light-emitting elements may be spaced apart from each other on the virtual line. The plurality of light-emitting elements are arranged at regular intervals, for example, equal intervals, depending on the shape of the virtual line. Furthermore, some of the multiple light-emitting elements are arranged at a first equal interval with respect to adjacent light-emitting elements, while the remaining light-emitting elements are arranged at a second equal interval with respect to adjacent light-emitting elements that differs from the first equal interval.

[0036] The plurality of light-emitting elements are arranged in 2n (where n is a natural number) in number on the substrate 100. In this case, the plurality of light-emitting elements are arranged in correspondence with respect to the center CP of the substrate 100. For example, if two light-emitting elements are provided, including a first light-emitting element 200a and a second light-emitting element 200b, the first light-emitting element 200a and the second light-emitting element 200b are arranged in correspondence with respect to the center CP of the substrate 100. More specifically, the light-emitting surfaces 205a and 205b of the first light-emitting element 200a and the second light-emitting element 200b are arranged facing each other. More specifically, the optical axes of the first light-emitting element 200a and the optical axis of the second light-emitting element 200b are arranged on the same line and can coincide with the center CP of the substrate 100.

[0037] In this case, the light source 200 may include at least one light-emitting group. The light-emitting group can be defined as a pair (2) of light-emitting elements from the plurality of light-emitting elements that are arranged in correspondence with each other. Specifically, the first light-emitting element 200a and the second light-emitting element 200b, whose light-emitting surfaces 205a and 205b are arranged facing each other, can be defined as one light-emitting group. The one light-emitting group can emit light toward the first region R1. Specifically, the light-emitting group can emit light toward the center CP of the substrate 100. As yet another example, the light-emitting elements are provided as four, as shown in Figure 2, and may include a first light-emitting element 200a, a second light-emitting element 200b, a third light-emitting element 200c, and a fourth light-emitting element 200d. In this case, the first light-emitting element 200a and the second light-emitting element 200b are arranged in correspondence with each other with respect to the center CP of the substrate 100. Also, the third light-emitting element 200c and the fourth light-emitting element 200d are arranged in correspondence with each other with respect to the center CP of the substrate 100. More specifically, the first light-emitting element 200a and the second light-emitting element 200b are arranged with their respective light-emitting surfaces 205a and 205b facing each other, and the third light-emitting element 200c and the fourth light-emitting element 200d are arranged with their respective light-emitting surfaces 205c and 205d facing each other. More specifically, the optical axes of the first light-emitting element 200a and the second light-emitting element 200b are arranged on the same line and can coincide with the center CP of the substrate 100. Also, the optical axes of the third light-emitting element 200c and the fourth light-emitting element 200d are arranged on the same line and can coincide with the center of the substrate 100. At this time, a virtual line connecting the centers of the first light-emitting element 200a and the second light-emitting element 200b can be perpendicular to a virtual line connecting the centers of the third light-emitting element 200c and the fourth light-emitting element 200d. As a result, the first to fourth light-emitting elements 200a, 200b, 200c, and 200d can emit light toward the center CP of the substrate 100.

[0038] The light source 200 may include at least one of the light-emitting groups. More specifically, the light source 200 may include multiple light-emitting groups. For example, a first light-emitting element 200a and a second light-emitting element 200b, whose light-emitting surfaces 205a and 205b are arranged facing each other, can be defined as a first light-emitting group, and a third light-emitting element 200c and a fourth light-emitting element 200d, whose light-emitting surfaces 205c and 205d are arranged facing each other, can be defined as a second light-emitting group. Each of the first and second light-emitting groups can emit light toward the first region R1. More specifically, the light-emitting group can emit light toward the center CP of the substrate 100. A pair of light-emitting elements included in each of the multiple light-emitting groups can be separated in a second direction (horizontal direction). For example, the first light-emitting element 200a and the second light-emitting element 200b included in the first light-emitting group can be separated in a second direction (horizontal direction), and the third light-emitting element 200c and the fourth light-emitting element 200d included in the second light-emitting group can be separated in a second direction (horizontal direction) different from the first light-emitting group. In this case, the distance between a pair of light-emitting elements included in one light-emitting group (first or second light-emitting group) may be greater than the distance between one light-emitting element included in one light-emitting group and one light-emitting element included in a different light-emitting group. For example, with respect to the second direction (horizontal direction), the first and second light-emitting elements 200a and 200b of the first light-emitting group can be separated by a first separation distance d1, and the first light-emitting element 200a can be separated from the third light-emitting element 200c or the fourth light-emitting element 200d of the second light-emitting group by a second separation distance d2 which is smaller than the first separation distance d1. In other words, if the light source 200 includes multiple light-emitting groups, they are separated in such a way that the above-described characteristics are satisfied, taking into consideration the light reflection characteristics of the reflective layer 300 and the uniformity characteristics of the emitted brightness.

[0039] The reflective layer 300 is placed on the substrate 100. The reflective layer 300 is placed between the substrate 100 and the resin layer 400. The reflective layer 300 is provided in film form and is bonded to the upper surface of the substrate 100. The reflective layer 300 may also be bonded between the substrate 100 and the resin layer 400, but is not limited to this. The reflective layer 300 may have an area smaller than the upper surface area of ​​the substrate 100. For example, the reflective layer 300 may be separated from the edge of the substrate 100, and the resin layer 400 may be attached to the substrate 100 in the separated area. This prevents the edge portion of the reflective layer 300 from peeling off. The reflective layer 300 may include an opening 301 in which the lower part of the light-emitting element is placed. The upper surface of the substrate 100 can be exposed through the opening 301 of the reflective layer 300. The opening 301 in the reflective layer 300 can expose part or all of the electrode pattern 150 to which the lower part of the light-emitting element is bonded. The size of the opening 301 may be the same as the size of the light-emitting element, or it may be provided to be larger than the light-emitting element.

[0040] The reflective layer 300 may be provided with a thickness thinner than the thickness of the light-emitting element. The reflective layer 300 may be formed with a thickness thinner than the thickness of the light-emitting element. The thickness of the reflective layer 300 can be in the range of 0.2 mm ± 0.02 mm. The lower part of the light-emitting element 200 may be partially inserted through the opening 301 of such a reflective layer 300, and the remaining area of ​​the light-emitting element, for example, the upper part, may protrude from the upper surface of the reflective layer 300. The light-emitting surface 205 of the light-emitting element may be parallel to the upper surface of the reflective layer 300.

[0041] The reflective layer 300 may include a metallic or non-metallic material. The metallic material may include metals such as aluminum, silver, and gold. The non-metallic material may include a plastic or resin material. The plastic material may be any one selected from the group consisting of polyethylene, polypropylene, polystyrene, polyvinyl chloride, polychlorinated biphenyl, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polybutylene terephthalate, polyethylene naphthalate, polyamide, polyacetal, polyphenylene ether, polyamide-imide, polyether-imide, polyether-ether-ketone, polyimide, polytetrafluoroethylene, liquid crystal polymer, fluororesin, copolymers thereof, and mixtures thereof. 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 layer 300 may be embodied as a single layer or a multilayer, and such a layer structure can improve the light reflection efficiency. The reflective layer 300 can reflect incident light and increase the amount of light so that the light is emitted with a uniform distribution. Here, the reflective layer 300 may be omitted if a highly reflective material is coated on the upper surface of the substrate 100.

[0042] The reflective layer 300 may contain a number of reflective agents (not shown). The reflective agents may be bubbles such as air, or a medium having the same refractive index as air. The reflective layer 300 can reflect or refract incident light in other directions using the number of reflective agents.

[0043] The reflective layer 300 may include an optical sheet 310 and a plurality of unit reflection patterns 320. The optical sheet 310 is placed on the upper surface of the substrate 100. The optical sheet 310 may be made of a material with excellent light reflection properties, such as the metal or non-metal material described above. The plurality of unit reflection patterns 320 are placed on the optical sheet 310. More specifically, the plurality of unit reflection patterns 320 are placed on the upper surface of the optical sheet 310 facing the resin layer 400.

[0044] The plurality of unit reflection patterns 320 may have a dot shape. The plurality of unit reflection patterns 320 are arranged in a form that protrudes from the upper surface of the optical sheet 310. The planar shape of each of the plurality of unit reflection patterns 320 may include one selected from circular, elliptical, and polygonal shapes. The plurality of unit reflection patterns 320 may contain reflective ink. As an example, the plurality of unit reflection patterns 320 may be formed by printing on the optical sheet 310. The plurality of unit reflection patterns 320 can be formed by printing with a material containing one of TiO2, CaCO3, BaSO4, Al2O3, Silicon, or PS. The plurality of unit reflection patterns 320 are arranged on the travel path of light emitted from the light-emitting element and / or the travel path of light emitted from the light-emitting element and reflected by other components. This allows the reflective layer 300 to improve light reflectivity and reduce light loss, and when a line light source or surface light source is realized, it can have improved brightness.

[0045] The reflective layer 300 includes a plurality of reflective pattern groups, each of which is positioned at a set location. The plurality of reflective pattern groups are positioned on a first region R1 of the substrate 100. More specifically, the reflective pattern groups are positioned in a region that overlaps with the first region R1 of the substrate 100 in a first direction (vertical direction; z-axis direction). A portion of the plurality of unit reflective patterns 320 is positioned on the first region R1. A portion of the plurality of unit reflective patterns 320 can overlap with the sensor 10 in a first direction. A portion of the reflective pattern groups is positioned on a second region R2 of the substrate 100. More specifically, a portion of the reflective pattern groups is positioned on a second-second region R2-2 of the substrate 100. The remainder of the plurality of unit reflective patterns 320 is positioned on the second-second region R2-2.

[0046] A portion of the plurality of unit reflection patterns 320 is arranged between the first light-emitting element 200a and the second light-emitting element 200b, overlapping with both light-emitting elements 200a and 200b in the second direction (horizontal direction). Another portion of the plurality of unit reflection patterns 320 is arranged between the third light-emitting element 200c and the fourth light-emitting element 200d, overlapping with both light-emitting elements 200c and 200d in the second direction (horizontal direction). In other words, the plurality of unit reflection patterns 320 are arranged on the light-emitting paths of the plurality of light-emitting elements.

[0047] The reflection pattern group does not have to be placed on the 2-1 region R2-1 of the substrate 100. That is, the unit reflection pattern 320 can not overlap the 2-1 region R2-1 on which the light-emitting element is placed in the first direction, and can be separated from the light-emitting element in the second direction (horizontal direction). More than n (n is a natural number of 3 or more) of the plurality of reflection pattern groups are provided, and each of the plurality of reflection pattern groups can include a plurality of unit reflection patterns 320. For example, the plurality of reflection pattern groups can include a first reflection pattern group G1, a second reflection pattern group G2, and a third reflection pattern group G3. The first reflection pattern group G1 can be the most adjacent to the light-emitting element among the plurality of reflection pattern groups. The first reflection pattern group G1 can include a plurality of unit reflection patterns 320 placed along a virtual first line L1 that forms a polygon, a circle, or an ellipse. Here, the center of the figure formed by the first line L1 can coincide with the center CP of the substrate 100.

[0048] The unit reflection patterns included in the first reflection pattern group G1 may be referred to as first reflection patterns 321. The plurality of first reflection patterns 321 may have a first width w1. Furthermore, a plurality of adjacent first reflection patterns 321 on the first line L1 may be spaced apart by a first pitch interval. For example, if the figure formed by the first line L1 is a circle or a regular n-gon (where n is a natural number greater than or equal to 3), the first pitch interval between a plurality of adjacent first reflection patterns 321 may be the same. Also, if the figure formed by the first line L1 is an ellipse or has a form that is a mixture of curves and straight lines, the first pitch interval may be partially the same or different. The second reflection pattern group G2 may be located at a greater distance from the light-emitting element than the first reflection pattern group G1. The second reflection pattern group G2 may include a plurality of unit reflection patterns 320 arranged along a virtual second line L2 that forms a polygon, a circle, or an ellipse. Here, the center of the figure formed by the second line L2 can coincide with the center of the substrate 100. Furthermore, the unit reflection pattern included in the second reflection pattern group G2 can be referred to as the second reflection pattern 322.

[0049] The second line L2 may have the same or different form as the first line L1. For example, the second line L2 may have the same form as the first line L1, taking into consideration its light reflection characteristics. The second line L2 is spaced apart from the first line L1. The second line L2 may be spaced apart from the first line L1 by a first distance a1. The second line L2 is positioned inside the first line L1. The second line L2 may be closer to the center of the substrate 100 than the first line L1.

[0050] The second reflection pattern 322 is spaced apart from the first reflection pattern 321. For example, the second reflection pattern 322 can be spaced apart from the first reflection pattern 321 by a first interval P1 in a second direction. Also, the shortest interval in the second direction between the second reflection pattern 322 and the center CP of the substrate 100 may be shorter than the shortest interval in the second direction between the first reflection pattern 321 and the center CP of the substrate 100. The plurality of second reflection patterns 322 may have a second width w2. The second width w2 may be larger than the first width w1. That is, the size (planar area) of the second reflection pattern 322 may be larger than the size (planar area) of the first reflection pattern 321. Multiple adjacent second reflection patterns 322 on the second line L2 can be spaced apart by a second pitch interval smaller than the first pitch interval. For example, if the figure formed by the second line L2 is a circle or a regular n-gon (where n is a natural number greater than or equal to 3), the second pitch intervals between adjacent second reflection patterns 322 may be the same. Also, if the figure formed by the second line L2 is elliptical or has a form that combines curves and straight lines, the second pitch intervals may be partially the same or different.

[0051] The second reflection pattern group G2 may include a set number of second reflection patterns 322. For example, the number of second reflection patterns 322 placed on the second line L2 may be less than or equal to the number of first reflection patterns 321 in the first reflection pattern group G1. Preferably, the number of second reflection patterns 322 may be less than the number of first reflection patterns 321. The multiple second reflection patterns 322 included in the second reflection pattern group G2 may have a set density per unit area. More specifically, the density of the multiple second reflection patterns 322 may be higher than the density of the multiple first reflection patterns 321 included in the first reflection pattern group G1.

[0052] The third reflection pattern group G3 may be located at a greater distance from the light-emitting element than the second reflection pattern group G2. The third reflection pattern group G3 may include a plurality of unit reflection patterns 320 arranged along a virtual third line L3 that forms a polygon, circle, or ellipse. Here, the center of the figure formed by the third line L3 may coincide with the center of the substrate 100. Furthermore, the unit reflection patterns included in the third reflection pattern group G3 may be referred to as third reflection patterns 323.

[0053] The third line L3 may have the same or different form as the second line L2. For example, the third line L3 may have the same form as the second line L2, taking into consideration its light reflection characteristics. The third line L3 is spaced apart from the second line L2. The third line L3 may be spaced apart from the second line L2 by a second distance a2 which is smaller than the first distance a1. The third line L3 is positioned inside the second line L2. The third line L3 may be closer to the center of the substrate 100 than the second line L2. The third reflection pattern 323 is spaced apart from the second reflection pattern 322. For example, the third reflection pattern 323 may be spaced apart from the second reflection pattern 322 by a second interval P2 in the second direction. The second interval P2 may be smaller than the first interval P1. Furthermore, the shortest distance in the second direction between the third reflection pattern 323 and the center CP of the substrate 100 may be shorter than the shortest distance in the second direction between the second reflection pattern 322 and the center CP of the substrate 100.

[0054] The plurality of third reflection patterns 323 may have a third width w3. The third width w3 may be larger than the second width w2. That is, the size (planar area) of the third reflection pattern 323 may be larger than the size (planar area) of the second reflection pattern 322. Multiple adjacent third reflection patterns 323 on the third line L3 can be separated by a third pitch interval smaller than the second pitch interval. For example, if the figure formed by the third line L3 is a circle or a regular n-gon (n is a natural number of 3 or more), the third pitch intervals between multiple adjacent third reflection patterns 323 may be the same. Also, if the figure formed by the third line L3 is an ellipse or has a form that is a mixture of curves and straight lines, the third pitch intervals may be partially the same or different.

[0055] The multiple third reflection patterns 323 included in the third reflection pattern group G3 may have a set density per unit area. More specifically, the density of the multiple third reflection patterns 323 may be higher than the density of the multiple second reflection patterns 322 included in the second reflection pattern group G2. The third reflection pattern group G3 may contain a set number of third reflection patterns 323. For example, the number of third reflection patterns 323 placed on the third line L3 may be less than or equal to the number of second reflection patterns 322 in the second reflection pattern group G2. Preferably, the number of third reflection patterns 323 may be less than the number of second reflection patterns 322.

[0056] The plurality of reflection pattern groups may further include a fourth reflection pattern group G4 and a fifth reflection pattern group G5, as shown in Figure 2. The fourth reflection pattern group G4 may be located at a greater distance from the light-emitting element than the third reflection pattern group G3. The fourth reflection pattern group G4 may include a plurality of unit reflection patterns 320 arranged along a hypothetical fourth line L4 that forms a polygon, circle, or ellipse. Here, the center of the figure formed by the fourth line L4 may coincide with the center of the substrate 100. The unit reflection patterns included in the fourth reflection pattern group G4 may be referred to as fourth reflection patterns 324. The fourth line L4 may have the same or different form as the third line L3. For example, the fourth line L4 may have the same form as the third line L3, taking into account its light reflection characteristics. The fourth line L4 is separated from the third line L3. The fourth line L4 may be separated from the third line L3 by a third distance a3 that is smaller than the second distance a2. The fourth line L4 is positioned inside the third line L3. The fourth line L4 can be closer to the center of the substrate 100 than the third line L3. The fourth reflection pattern 324 is spaced apart from the third reflection pattern 323. For example, the fourth reflection pattern 324 can be spaced apart from the third reflection pattern 323 by a third spacing P3 in the second direction. The third spacing P3 may be smaller than the second spacing P2. Also, the shortest spacing in the second direction between the fourth reflection pattern 324 and the center CP of the substrate 100 may be shorter than the shortest spacing in the second direction between the third reflection pattern 323 and the center CP of the substrate 100. The plurality of fourth reflection patterns 324 may have a fourth width w4. The fourth width w4 may be larger than the third width w3. That is, the size (planar area) of the fourth reflection pattern 324 may be larger than the size (planar area) of the third reflection pattern 323. Multiple adjacent fourth reflection patterns 324 on the fourth line L4 can be spaced apart by a fourth pitch interval smaller than the third pitch interval.For example, if the figure formed by the fourth line L4 is a circle or a regular n-gon (where n is a natural number greater than or equal to 3), the fourth pitch intervals between adjacent fourth reflection patterns 324 may be the same. Also, if the figure formed by the fourth line L4 is elliptical or has a form that combines curves and straight lines, the fourth pitch intervals may be partially the same or different.

[0057] The multiple fourth reflection patterns 324 included in the fourth reflection pattern group G4 may have a set density per unit area. Specifically, the density of the multiple fourth reflection patterns 324 may be higher than the density of the multiple third reflection patterns 323 included in the third reflection pattern group G3. The fourth reflection pattern group G4 may contain a set number of fourth reflection patterns 324. For example, the number of fourth reflection patterns 324 placed on the fourth line L4 may be less than or equal to the number of third reflection patterns 323 in the third reflection pattern group G3. Preferably, the number of fourth reflection patterns 324 may be less than the number of third reflection patterns 323.

[0058] The fifth reflection pattern group G5 can be located at a greater distance from the light-emitting element than the fourth reflection pattern group G4. The fifth reflection pattern group G5 can include a plurality of unit reflection patterns 320 arranged along a hypothetical fifth line L5 that forms a polygon, circle, or ellipse. Here, the center of the figure formed by the fifth line L5 can coincide with the center of the substrate 100. The unit reflection patterns included in the fifth reflection pattern group G5 can also be referred to as fifth reflection patterns 325. The fifth line L5 can have the same or different form as the fourth line L4. For example, the fifth line L5 can have the same form as the fourth line L4, taking into account its light reflection characteristics. The fifth line L5 is separated from the fourth line L4. The fifth line L5 can be separated from the fourth line L4 by a fourth distance a4 that is smaller than the third distance a3. The fifth line L5 is located inside the fourth line L4. The fifth line L5 can be closer to the center of the substrate 100 than the fourth line L4. The fifth reflection pattern 325 is spaced apart from the fourth reflection pattern 324. For example, the fifth reflection pattern 325 can be spaced apart from the fourth reflection pattern 324 by a fourth interval in the second direction. The fourth interval may be smaller than the third interval P3. Also, the shortest distance in the second direction between the fifth reflection pattern 325 and the center CP of the substrate 100 may be shorter than the shortest distance in the second direction between the fourth reflection pattern 324 and the center CP of the substrate 100.

[0059] The plurality of fifth reflection patterns 325 may have a fifth width. The fifth width may be larger than the fourth width w4. That is, the size (planar area) of the fifth reflection pattern 325 may be larger than the size (planar area) of the fourth reflection pattern 324. Multiple adjacent fifth reflection patterns 325 on the fifth line L5 can be separated by a fifth pitch interval smaller than the fourth pitch interval. For example, if the figure formed by the fifth line L5 is a circle or a regular n-gon (n is a natural number of 3 or more), the fifth pitch interval between multiple adjacent fifth reflection patterns 325 may be the same. Also, if the figure formed by the fifth line L5 is an ellipse or has a form in which curves and straight lines are mixed, the fifth pitch interval may be partially the same or different.

[0060] The multiple fifth reflection patterns 325 included in the fifth reflection pattern group G5 may have a set density per unit area. Specifically, the density of the multiple fifth reflection patterns 325 may be higher than the density of the multiple fourth reflection patterns 324 included in the fourth reflection pattern group G4. The fifth reflection pattern group G5 may contain a set number of fifth reflection patterns 325. For example, the number of fifth reflection patterns 325 placed on the fifth line L5 may be less than or equal to the number of fourth reflection patterns 324 in the fourth reflection pattern group G4. Preferably, the number of fifth reflection patterns 325 may be less than the number of fourth reflection patterns 324.

[0061] The reflective layer 300 according to the embodiment includes a plurality of reflective pattern groups, each containing a plurality of unit reflective patterns 320. The plurality of unit reflective patterns 320 are arranged on the first region R1 and the second-second region R2-2 with characteristics such as width, spacing, pitch spacing, and density set to improve light reflection characteristics. In particular, the maximum spacing between the plurality of unit reflective patterns 320 arranged on the first region R1 may be smaller than the maximum spacing between the plurality of unit reflective patterns 320 arranged on the second-second region R2-2. For example, the reflective pattern group closest to the light-emitting element, for example, the first reflective pattern group G1, is arranged on the second-second region R2-2, and the reflective pattern group closest to the center CP of the substrate 100, for example, the fifth reflective pattern group G5, is arranged on the first region R1. In this case, the maximum spacing between adjacent fifth reflection patterns 325 in the fifth reflection pattern group G5 (fifth pitch spacing) may be smaller than the maximum spacing between adjacent first reflection patterns 321 in the first reflection pattern group G1 (first pitch spacing). The size of the plurality of unit reflection patterns 320 arranged on the first region R1 may be larger than the size of the plurality of unit reflection patterns 320 arranged on the second-second region R2-2. For example, the size of the fifth reflection pattern 325 in the fifth reflection pattern group G5 may be larger than the size of the first reflection pattern 321 in the first reflection pattern group G1.

[0062] In other words, in the embodiment, the spacing between multiple reflection pattern groups, for example, the spacing between unit reflection patterns 320 included in each reflection pattern group, can decrease as you move from the second-second region R2-2 towards the first region R1, and more specifically, from the second-second region R2-2 towards the center CP of the substrate 100. Also, as you move from the second-second region R2-2 towards the center CP of the substrate 100, the size of the unit reflection patterns 320 increases, and the density of the unit reflection patterns 320 also increases. As a result, the reflection layer 300 can effectively reflect the light emitted from the light source 200 and provide uniform light.

[0063] The resin layer 400 is placed on the substrate 100. The resin layer 400 can face the substrate 100. The resin layer 400 is placed on the entire upper surface or a portion of the upper surface of the substrate 100. The lower surface area of ​​the resin layer 400 may be the same as or larger than the upper surface area of ​​the substrate 100. A portion of the resin layer 400 can overlap the sensor 10 in a first direction (vertical direction; z-axis direction). The resin layer 400 may be formed of a transparent material. The resin layer 400 may include a resin material such as silicone or epoxy. The resin layer 400 may include a thermosetting resin material, and may selectively include, for example, PC, OPS, PMMA, PVC, etc. The resin layer 400 may be formed of glass, but is not limited thereto. For example, the main material of the resin layer 400 can be a resin material mainly composed of urethane acrylate oligomer. For example, a mixture of a synthetic oligomer, such as urethane acrylate oligomer, with a polymer type such as polyacrylic can be used. Of course, this can further include monomers mixed with low-boiling point dilutable reactive monomers such as IBOA (isobornyl acrylate), HPA (Hydroxylpropyl acrylate), 2-HEA (2-hydroxyethyl acrylate), etc., and can also be mixed with photoinitiators (e.g., 1-hydroxycyclohexyl phenyl-ketone) or antioxidants as additives.

[0064] The resin layer 400 is provided as a layer that guides light with resin, and is therefore provided with a thinner thickness than glass, and is provided as a flexible plate. The resin layer 400 can emit the point light emitted from the light-emitting element 200 in the form of a line light source or a surface light source. The upper surface of the resin layer 400 can diffuse the light emitted from the light-emitting element 200 and emit light. For example, the resin layer 400 may contain beads (not shown), which can diffuse and reflect incident light to increase the amount of light. The beads may be arranged in a range of 0.01 to 0.3% of the weight of the resin layer 400. The beads are composed of one of the following materials: silicone, silica, glass bubble, PMMA (polymethyl methacrylate), urethane, Zn, Zr, Al2O3, and acrylic. The bead size can be, but is not limited to, approximately 1 μm to approximately 20 μm. The resin layer 400 is placed on the light-emitting element 200, so that it can protect the light-emitting element 200 and reduce the loss of light emitted from the light-emitting element 200. The light-emitting element 200 may be embedded beneath the resin layer 400. The resin layer 400 can contact the surface of the light-emitting element 200 and can contact the light-emitting surface 205 of the light-emitting element 200. A portion of the resin layer 400 is placed in the opening 301 of the reflective layer 300. A portion of the resin layer 400 can contact the upper surface of the substrate 100 through the opening 301 of the reflective layer 300. As a result, a portion of the resin layer 400 comes into contact with the substrate 100, thereby fixing the reflective layer 300 between the resin layer 400 and the substrate 100.

[0065] The resin layer 400 may be formed with a thickness greater than the thickness of the light-emitting element 200. For example, the thickness of the resin layer 400 may be approximately 1 mm or more. More specifically, the thickness of the resin layer 400 may be approximately 1 mm to approximately 10 mm. If the thickness of the resin layer 400 is less than approximately 1 mm, it will not be able to effectively guide the light emitted from the light-emitting element 200. This makes it difficult for the light source module 1000 to realize a uniform surface light source. Also, if the thickness of the resin layer 400 is less than approximately 1 mm, it will be difficult to effectively protect the light-emitting element 200, and the adhesion between the substrate 100 and the reflective layer 300 will decrease. Furthermore, if the thickness of the resin layer 400 exceeds approximately 10 mm, light loss will occur due to the increased light path for the light emitted from the light-emitting element 200, and the brightness of the surface light source will decrease. Therefore, it is preferable that the thickness of the resin layer 400 satisfies the above range.

[0066] The light source module may further include a protective layer 500. The protective layer 500 is disposed on top of the resin layer 400. The protective layer 500 may be located at the uppermost end of the light source module. The protective layer 500 can protect the components located below it. The protective layer 500 may include a light-transmitting material. The protective layer 500 may also include a material that allows signals emitted from the sensor 10 to pass through without interference. The protective layer 500 may include at least one of PET (Polyethylene terephthalate), PS (Polystyrene), PI (Polyimide), PEN (Polyethylene naphthalate), and PC (Polycarbonate). The protective layer 500 may have a thickness of approximately 50 μm to approximately 2 mm. More specifically, the protective layer 500 may have a thickness of approximately 50 μm to approximately 1.5 mm. If the thickness of the protective layer 500 is less than approximately 50 μm, it becomes difficult to effectively protect the components located below it due to its relatively thin thickness. Furthermore, if the thickness of the protective layer 500 exceeds approximately 2 mm, the overall thickness of the light source module increases, resulting in a decrease in brightness. Also, if the thickness of the protective layer 500 exceeds approximately 2 mm, the flexibility of the light source module decreases due to its thickness. In this case, the structures and forms to which the light source module can be applied become limited. Therefore, it is preferable that the thickness of the protective layer 500 satisfies the above-mentioned range.

[0067] The light source module may further include a housing 30. The housing 30 is positioned on the lower surface of the substrate 100 facing the sensor 10. That is, the housing 30 is positioned between the substrate 100 and the sensor 10. The housing 30 is bonded to the lower surface of the substrate 100. In this case, the first gap B1 is positioned between the housing 30 and the sensor 10. The housing 30 may include a material that has a predetermined reliability and through which the signal emitted from the sensor 10 can pass. As an example, the housing 30 may include at least one of polypropylene (PP), polyethylene (PE), polycarbonate (PC), PBT (Polybutylene Terephthalate), POM (Poly Oxy Methylene, Polyacetal), PPO (Polyphenylene Oxide) resin, or modified PPO resin.

[0068] The housing 30 may be provided with a thickness of approximately 1 mm or more. More specifically, the housing 30 may be provided with a thickness of approximately 1 mm to approximately 10 mm. Preferably, the housing 30 may be provided with a thickness of approximately 1 mm to approximately 5 mm, taking into consideration reliability and the overall thickness of the lighting device 1000. The housing 30 can support a configuration that is placed on top of the lower surface of the substrate 100, for example, the substrate 100, the reflective layer 300, and the resin layer 400. The housing 30 can also be provided so that sufficient space is formed between the substrate 100 and the sensor 10. That is, the housing 30 is provided within the thickness range described above so that the first gap B1 can secure the set separation distance (first height h1), and can support the substrate 100 and the configuration placed on top of the substrate 100.

[0069] The lighting device 1000 may include an optical member 700. The optical member 700 is positioned on the light source module. The optical member 700 is positioned on top of the protective layer 500. The optical member 700 can have a variety of shapes. For example, the optical member 700 can have a variety of shapes such as polygons, circles, or ellipses. The optical member 700 may have a shape that corresponds to the light source module. The optical member 700 may have a shape that corresponds to the lighting device 1000. The optical member 700 may include a transmissive region 710 and an opaque region 720. The transmissive region 710 is a region through which light emitted from the light source module is transmitted. The transmissive region 710 may overlap with the light source module in a first direction (vertical direction; z-axis direction). Specifically, the transmissive region 710 is positioned in a region that overlaps with a portion of the plurality of unit reflection patterns 320 in a first direction. The transparent area 710 may be provided in various shapes such as figures, numbers, letters, characters, symbols, icons, etc. Light emitted from the light source module passes through the transparent area 710 and is emitted to the outside, and the output light corresponding to the shape of the transparent area 710 can be seen outside the lighting device 1000. The non-transparent area 720 is an area other than the transparent area 710 that does not allow light emitted from the light source module to pass through. As an example, the non-transparent area 720 can be realized using colored ink such as black.

[0070] The optical member 700 is separated from the light source module. The optical member 700 can be separated from the light source module in a first direction (vertical direction; z-axis direction). Separation of the optical member 700 from the light source module forms a second gap B2 between the two components. The second gap B2 may be air or a vacuum. The optical member 700 is separated from the resin layer 400. Specifically, the optical member 700 can be separated from the light source module in a first direction. The optical member 700 can be separated from the light source module by a second height h2. Here, the second height h2 may be the distance between the upper surface of the protective layer 500 facing the optical member 700 and the lower surface of the optical member 700. The second height h2 may be smaller than the first height h1. For example, the second height h2 may be approximately 10 mm or less. Specifically, the second height h2 may be approximately 1 mm to approximately 10 mm. If the second height h2 is less than approximately 1 mm, the light emitted from the light source module will have difficulty diffusing uniformly within the second gap B2, which has a different refractive index. Also, if the second height h2 exceeds approximately 10 mm, the light guide distance of the light emitted from the light source module increases, causing light loss and increasing the overall thickness of the lighting device 1000. It is preferable that the second height h2 satisfies the above range in order to prevent light loss in the lighting device 1000 and to realize uniform brightness. The optical member 700 has a set transmittance and reflectance and can have improved aesthetics. For example, the shape of the transparent region 710 can correspond to the shape of a vehicle's logo or emblem, and the light that has passed through the light source module is emitted from a surface light source and provided to the outside through the transparent region 710. This can increase the uniformity of the light of the vehicle's logo or emblem provided to the outside through the transparent region 710.

[0071] The lighting device 1000 according to the embodiment can effectively sense objects in front of it and provide uniform light in front by arranging the light source module so as to overlap with the sensor 10. At this time, the lighting device 1000 can prevent interference with the signal emitted from the sensor 10 by arranging the light source 200 and the electrode pattern 150 in an area that does not overlap with the sensor 10 in the first direction. This prevents the reliability and sensing accuracy of the sensor 10 from being reduced by the light source module. The light emitted from the light source 200 is uniformly reflected in the direction set by the reflective layer 300 and the plurality of unit reflection patterns 320 arranged in the reflective layer 300. As a result, the lighting device 1000 can provide light in a shape corresponding to the shape of the transmitted area 710 in the direction of the light, and the brightness uniformity of the provided light is excellent.

[0072] Figures 4 to 6 are further cross-sectional views illustrating the arrangement of unit reflection patterns in the light source module according to the embodiment. In the explanation using Figures 4 to 6, the explanation of identical or similar configurations to the previously described light source module is omitted, and identical or similar configurations are assigned the same reference numerals.

[0073] Referring to Figures 4 to 6, the reflective layer 300 can include a plurality of reflective pattern groups. More specifically, the reflective layer can include three or more reflective pattern groups, and each of the plurality of reflective pattern groups can include a plurality of unit reflective patterns 320. For example, the plurality of reflective pattern groups can include a first reflective pattern group G1, a second reflective pattern group G2, a third reflective pattern group G3, and a fourth reflective pattern group G4. Referring to Figure 4, the first reflective pattern group G1 is positioned on a virtual first line L1 and can include a plurality of unit reflective patterns 320 defined as a first reflective pattern 321. Each of the plurality of first reflective patterns 321 can have a first width w1. The second reflective pattern group G2 is positioned on a virtual second line L2 and can include a plurality of unit reflective patterns 320 defined as a second reflective pattern 322. The plurality of second reflection patterns 322 are arranged adjacent to the center CP of the substrate 100, more so than the plurality of first reflection patterns 321, and can be separated from the plurality of first reflection patterns 321 by the first interval P1 in the second direction.

[0074] Each of the second reflection patterns 322 may have a second width w2 that is greater than the first width w1. That is, the size (planar area) of the second reflection pattern 322 may be greater than the size (planar area) of the first reflection pattern 321. The third reflection pattern group G3 is arranged on a virtual third line L3 and may include a plurality of unit reflection patterns 320 defined as third reflection patterns 323. The plurality of third reflection patterns 323 are arranged more adjacent to the center CP of the substrate 100 than the plurality of second reflection patterns 322 and can be separated from the plurality of second reflection patterns 322 by a second interval P2 in the second direction. In this case, the second interval P2 may be the same as the first interval P1. Each of the third reflection patterns 323 may have a third width w3 that is greater than the second width w2. That is, the size (planar area) of the third reflection pattern 323 may be greater than the size (planar area) of the second reflection pattern 322.

[0075] The fourth reflection pattern group G4 is arranged on a virtual fourth line L4 and may include a plurality of unit reflection patterns 320 defined as the fourth reflection pattern 324. The plurality of fourth reflection patterns 324 are arranged more adjacent to the center CP of the substrate 100 than the plurality of third reflection patterns 323 and can be separated from the plurality of third reflection patterns 323 by the third interval P3 in the second direction. In this case, the third interval P3 may be the same as the second interval P2. Each of the fourth reflection patterns 324 may have a fourth width w4 that is larger than the third width w3. That is, the size (planar area) of the fourth reflection pattern 324 may be larger than the size (planar area) of the third reflection pattern 323. In other words, in the light source module according to Figure 4, the spacing between the plurality of reflection pattern groups, for example, the spacing between the unit reflection patterns 320 included in each reflection pattern group, may decrease as you move from the 2-2 region R2-2 toward the center CP of the substrate 100, or it may remain constant without increasing. That is, the first interval P1, the second interval P2, and the third interval P3 may be the same.

[0076] The size of the unit reflection pattern 320 can be increased as you move from the second-second region R2-2 toward the center CP of the substrate 100. Also, the density of the unit reflection pattern 320 can be increased as you move from the second-second region R2-2 toward the center CP of the substrate 100. Specifically, the density of the pattern can be controlled by controlling the size (planar area) of the unit reflection pattern 320 included in each reflection pattern group. As a result, the reflective layer 300 can effectively reflect the light emitted from the light source 200 and provide uniform light.

[0077] Referring to Figure 5, the first reflection pattern group G1 is arranged on a virtual first line L1 and may include a plurality of unit reflection patterns 320 defined as first reflection patterns 321. Each of the plurality of first reflection patterns 321 may have a first width w1. The second reflection pattern group G2 is arranged on a virtual second line L2 and may include a plurality of second reflection patterns 322 positioned more adjacent to the center CP of the substrate 100 than the plurality of first reflection patterns 321. The plurality of second reflection patterns 322 may be separated from the plurality of first reflection patterns 321 by the first spacing P1 in a second direction. Each of the second reflection patterns 322 may also have a second width w2, and the second width w2 may be the same as the first width w1. That is, the size (planar area) of the second reflection pattern 322 may be the same as the size (planar area) of the first reflection pattern 321.

[0078] The third reflection pattern group G3 may include a plurality of third reflection patterns 323 arranged on a virtual third line L3 and positioned more adjacent to the center CP of the substrate 100 than the plurality of second reflection patterns 322. The plurality of third reflection patterns 323 may be separated from the plurality of second reflection patterns 322 by a second interval P2 in a second direction. In this case, the second interval P2 may be smaller than the first interval P1. Each of the third reflection patterns 323 may have a third width w3, and the third width w3 may be the same as the first width w1 and the second width w2. That is, the size (planar area) of the third reflection pattern 323 may be the same as the size (planar area) of the first reflection pattern 321 and the second reflection pattern 322. The fourth reflection pattern group G4 may include a plurality of fourth reflection patterns 324 arranged on a virtual fourth line L4 and positioned more adjacent to the center CP of the substrate 100 than the plurality of third reflection patterns 323. The plurality of fourth reflection patterns 324 can be separated from the plurality of third reflection patterns 323 by the third interval P3 in the second direction. In this case, the third interval P3 may be smaller than the second interval P2.

[0079] Each of the fourth reflection patterns 324 may have a fourth width w4, and the fourth width w4 may be the same as the first width w1, the second width w2, and the third width w3. That is, the size (planar area) of the fourth reflection pattern 324 may be the same as the size (planar area) of the first reflection pattern 321, the second reflection pattern 322, and the third reflection pattern 323. In other words, in the light source module shown in Figure 5, the spacing between multiple reflection pattern groups, for example, the spacing between unit reflection patterns 320 included in each reflection pattern group, can decrease as you move from the 2-2 region R2-2 toward the center CP of the substrate 100. As you move from the 2-2 region R2-2 toward the center CP of the substrate 100, the size of the unit reflection pattern 320 may increase or remain constant without decreasing. Also, as you move from the 2-2 region R2-2 toward the center CP of the substrate 100, the density of the unit reflection pattern 320 can increase. More specifically, the density of the patterns can be controlled by controlling the pitch interval of the unit reflection patterns 320 included in each reflection pattern group or the intervals P1, P2, and P3 between each reflection pattern group. This allows the reflection layer 300 to effectively reflect the light emitted from the light source 200 and provide uniform light.

[0080] Referring to Figure 6, the first reflection pattern group G1 is arranged on a virtual first line L1 and may include a plurality of unit reflection patterns 320 defined as first reflection patterns 321. Each of the plurality of first reflection patterns 321 may have a first width w1. The second reflection pattern group G2 is arranged on a virtual second line L2 and may include a plurality of second reflection patterns 322 positioned more adjacent to the center CP of the substrate 100 than the plurality of first reflection patterns 321. The plurality of second reflection patterns 322 may be separated from the plurality of first reflection patterns 321 by the first distance P1 in a second direction. Each of the second reflection patterns 322 may have a second width w2, and the second width w2 may be the same as the first width w1. That is, the size (planar area) of the second reflection pattern 322 may be the same as the size (planar area) of the first reflection pattern 321.

[0081] The third reflection pattern group G3 may include a plurality of third reflection patterns 323 arranged on a virtual third line L3 and positioned adjacent to the center CP of the substrate 100 more than the plurality of second reflection patterns 322. The plurality of third reflection patterns 323 may be separated from the plurality of second reflection patterns 322 by a second interval P2 in a second direction. In this case, the second interval P2 may be the same as the first interval P1. Each of the third reflection patterns 323 may have a third width w3, and the third width w3 may be the same as the first width w1 and the second width w2. That is, the size (planar area) of the third reflection pattern 323 may be the same as the size (planar area) of the first reflection pattern 321 and the second reflection pattern 322.

[0082] The fourth reflection pattern group G4 may include a plurality of fourth reflection patterns 324 arranged on a virtual fourth line L4 and positioned more adjacent to the center CP of the substrate 100 than the plurality of third reflection patterns 323. The plurality of fourth reflection patterns 324 may be separated from the plurality of third reflection patterns 323 by a third interval P3 in a second direction. In this case, the third interval P3 may be the same as the first interval P1 and the second interval P2. Each of the fourth reflection patterns 324 may have a fourth width w4, and the fourth width w4 may be the same as the first width w1, the second width w2 and the third width w3. That is, the size (planar area) of the fourth reflection pattern 324 may be the same as the size (planar area) of the first reflection pattern 321, the second reflection pattern 322 and the third reflection pattern 323.

[0083] That is, in the light source module shown in Figure 6, the spacing between multiple reflection pattern groups, for example, the shortest spacing between unit reflection patterns 320 included in each reflection pattern group, may decrease as you move from the 2-2 region R2-2 toward the center CP of the substrate 100, or it may remain constant without increasing. That is, the first spacing P1, the second spacing P2, and the third spacing P3 may be the same. As you move from the 2-2 region R2-2 toward the center CP of the substrate 100, the size of the unit reflection pattern 320 may increase, or it may remain constant without decreasing. Also, as you move from the 2-2 region R2-2 toward the center CP of the substrate 100, the density of the unit reflection pattern 320 can increase. Specifically, the density of the patterns can be controlled by controlling the pitch spacing of the unit reflection patterns 320 included in each reflection pattern group. As a result, the reflective layer 300 can effectively reflect the light emitted from the light source 200 and provide uniform light.

[0084] Figures 7 to 9 are diagrams illustrating various forms of the light source module according to the embodiment. In the explanation using Figures 7 to 9, the explanation will be omitted for configurations identical or similar to the light source module described above, and the same reference numerals will be assigned to identical or similar configurations. The reflective layer 300 according to the embodiment may include a plurality of reflective pattern groups. There may be n or more of these reflective pattern groups (where n is a natural number of 3 or more), and each of the plurality of reflective pattern groups may include a plurality of unit reflective patterns 320. Each of the plurality of reflective pattern groups includes a plurality of unit reflective patterns 320 arranged along a virtual line forming a polygon, circle, or ellipse, and the shape of the virtual line formed by each of the plurality of reflective pattern groups, and the distance characteristics between the unit reflective patterns 320 arranged on the virtual line and the center CP of the substrate 100 can correspond to each other. Accordingly, in the explanation of Figures 7 to 9, for the sake of convenience, the first reflective pattern group G1 will be explained first.

[0085] Referring to Figure 7, the upper shape of the optical module according to the embodiment may be circular. In this case, the substrate 100 and the resin layer 400 may be circular, and the spacing between pairs of light-emitting elements included in each of the plurality of light-emitting groups may be the same. For example, the first and second light-emitting elements 200a and 200b of the first light-emitting group can be separated by the first separation distance d1, and the third and fourth light-emitting elements 200c and 200d of the second light-emitting group can also be separated by the first separation distance d1. The first reflection pattern group G1 may include a plurality of unit reflection patterns 320, for example, a plurality of first reflection patterns 321, arranged along a virtual first line L1 that forms a circle. The plurality of first reflection patterns 321 can be spaced equally apart on the first line L1. As an example, the plurality of adjacent first reflection patterns 321 can be spaced by a first pitch interval.

[0086] The distance S1 between each of the plurality of first reflection patterns 321 from the center CP of the substrate 100 may be constant. More specifically, the distance S1 between the center CP of the substrate 100 and each of the plurality of first reflection patterns 321 may be constant without changing along the clockwise direction. That is, the plurality of first reflection patterns 321 are arranged at a constant distance from the center of the substrate 100 and are arranged at equal intervals with adjacent patterns. As a result, the reflection layer 300 can uniformly reflect the light emitted from the light source 200 in a circular light source module in a set direction, for example, upward. Therefore, the lighting device 1000 can improve brightness and improve brightness uniformity characteristics.

[0087] Referring to Figure 8, the upper shape of the optical module according to the embodiment may be elliptical. In this case, the substrate 100 and the resin layer 400 may be elliptical, and the spacing between pairs of light-emitting elements included in each of the plurality of light-emitting groups may differ. For example, the first and second light-emitting elements 200a and 200b of the first light-emitting group can be separated by the first separation distance d1, and the third and fourth light-emitting elements 200c and 200d of the second light-emitting group can be separated by a third separation distance shorter than the first separation distance d1. The first reflection pattern group G1 may include a plurality of unit reflection patterns 320, for example, a plurality of first reflection patterns 321, arranged along a virtual first line L1 that forms an ellipse. In this case, the shape of the first line L1 can correspond to the upper shape of the substrate 100 or the resin layer 400.

[0088] The plurality of first reflection patterns 321 can be spaced equally apart on the first line L1. For example, the plurality of adjacent first reflection patterns 321 can be spaced at a first pitch interval. The distance S1 between each of the plurality of first reflection patterns 321 from the center CP of the substrate 100 can be varied. Specifically, because the first line L1 has an elliptical shape, the distance S1 between the center CP of the substrate 100 and each of the first reflection patterns 321 can be increased or decreased along the clockwise direction. That is, the plurality of first reflection patterns 321 are arranged equally apart from adjacent patterns, and the distance from the center of the substrate 100 can be varied. As a result, the reflection layer 300 can uniformly reflect the light emitted from the light source 200 in an elliptical light source module in a set direction, for example, upward. Therefore, the lighting device 1000 can improve brightness and improve brightness uniformity characteristics.

[0089] Referring to Figure 9, the upper shape of the optical module according to the embodiment may be polygonal. In this case, the substrate 100 and the resin layer 400 may be polygonal, and the spacing between pairs of light-emitting elements included in each of the plurality of light-emitting groups may be the same or different. Specifically, if the polygon is a regular n-gon, the spacing between pairs of light-emitting elements included in each of the plurality of light-emitting groups may be the same, and if it is not a regular n-gon, the spacing may be different. If the polygon is a regular n-gon, the first and second light-emitting elements 200a and 200b of the first light-emitting group can be separated by the first separation distance d1, and the third and fourth light-emitting elements 200c and 200d of the second light-emitting group can also be separated by the first separation distance d1.

[0090] The first reflection pattern group G1 may include a plurality of unit reflection patterns 320, for example, a plurality of first reflection patterns 321, arranged along a virtual first line L1 that forms a regular n-gon. In this case, the shape of the first line L1 may correspond to the upper shape of the substrate 100 or the resin layer 400. The plurality of first reflection patterns 321 may be spaced at equal intervals on the first line L1. For example, the plurality of adjacent first reflection patterns 321 may be spaced at a first pitch interval. The distance between each of the plurality of first reflection patterns 321 from the center CP of the substrate 100 may vary. Specifically, because the first line L1 has a regular n-gon shape, the distance between each of the center CP of the substrate 100 and the first reflection pattern 321 may increase or decrease along the clockwise direction. For example, the closer a first reflection pattern 321 is to a vertex of the regular n-gon of the first line L1, the larger the distance S1 from the center of the substrate 100 may be.

[0091] If the polygon is not a regular n-gon, the first and second light-emitting elements 200a and 200b of the first light-emitting group can be separated by the first separation distance d1, and the third and fourth light-emitting elements 200c and 200d of the second light-emitting group can be separated by a third separation distance shorter than the first separation distance d1. The distance S1 between each of the plurality of first reflection patterns 321 from the center CP of the substrate 100 can be varied. Specifically, because the first line L1 has a polygonal shape, the distance S1 between each of the center CP of the substrate 100 and the first reflection pattern 321 can be increased or decreased along the clockwise direction. That is, the plurality of first reflection patterns 321 are arranged at equal intervals with adjacent patterns, and the distance with respect to the center of the substrate 100 can be varied. As a result, the reflection layer 300 can uniformly reflect the light emitted from the light source 200 in a polygonal light source module in a set direction, for example, upward. Therefore, the lighting device 1000 can improve brightness and improve brightness uniformity characteristics.

[0092] Figure 10 is a plan view illustrating an alternative arrangement of the unit reflection pattern in the light source module according to the embodiment. In the explanation using Figure 10, the explanation of the same or similar configuration as the previously described light source module will be omitted, and the same reference numerals will be assigned to the same or similar configurations.

[0093] Referring to Figure 10, the light source 200 may include a plurality of light-emitting elements. The plurality of light-emitting elements are arranged along the edge of the substrate 100. For example, the plurality of light-emitting elements are arranged on a virtual line forming a polygon, circle, or ellipse with the center CP of the substrate 100 as the center point. The plurality of light-emitting elements can be spaced apart from each other on the virtual line. The reflective layer 300 may include a plurality of unit reflection patterns 320 arranged on the optical sheet 310. The plurality of unit reflection patterns 320 are arranged on the travel paths of light emitted from the light-emitting elements and / or the travel paths of light emitted from the light-emitting elements and reflected by other components. The plurality of unit reflection patterns 320 are arranged on a portion of the area compared to the light source module in Figure 2. For example, the plurality of unit reflection patterns 320 are arranged in areas corresponding to the emission path and directional angle of light emitted from the light-emitting elements. Specifically, a relatively small amount of light is provided to areas located at a distance relatively far from the emission surface of the light-emitting elements or not located within the directional angle of the light-emitting elements. For example, a relatively small amount of light is supplied to the region between adjacent light-emitting elements and the corresponding region. In this case, the effect of light reflection by the unit reflection pattern 320 arranged in the region becomes minute.

[0094] As a result, in the light source module shown in Figure 10, the unit reflection pattern 320 is arranged in a region corresponding to the emission path and directional angle of the light emitted from the light-emitting element, and does not need to be arranged in a region where a relatively small amount of light is provided, as described above.

[0095] For example, if the light source 200 emits light toward the center of the substrate 100 and includes a plurality of light-emitting elements spaced apart from each other, the plurality of unit reflection patterns 320 can have a configuration that extends from the center CP of the substrate 100 toward each of the plurality of light-emitting elements. As an example, if the light source 200 includes first to fourth light-emitting elements 200a, 200b, 200c, and 200d spaced apart from each other as shown in Figure 10 and emitting light toward the center CP of the substrate 100, the plurality of unit reflection patterns 320 can have a configuration that extends from the center CP of the substrate 100 toward each of the first to fourth light-emitting elements 200a, 200b, 200c, and 200d. That is, when the region where the plurality of unit reflection patterns 320 are arranged is viewed from above, the region can have a "+" shape. As a result, the light emitted from the light source 200 is uniformly reflected in the direction set by the reflective layer 300 and the plurality of unit reflection patterns 320. In this case, the number of unit reflection patterns 320 formed by arranging the plurality of unit reflection patterns 320 at positions that take into account the emission direction and directional angle of the light source 200 can be minimized, and light with uniform brightness in the upward direction can be provided.

[0096] Figure 11 is a plan view illustrating an alternative arrangement of light sources in a light source module according to an embodiment. In the explanation using Figure 11, the explanation of configurations identical or similar to those of the previously described light source module will be omitted, and identical or similar configurations will be assigned the same reference numerals.

[0097] Referring to Figure 11, the light source 200 may include a plurality of light-emitting elements. The plurality of light-emitting elements are arranged along the edge of the substrate 100. For example, the plurality of light-emitting elements are arranged on a virtual line that forms a polygon, circle, or ellipse with the center CP of the substrate 100 as its center point. The plurality of light-emitting elements can be spaced apart from each other on the virtual line. The plurality of light-emitting elements are arranged at regular intervals, for example, equal intervals, depending on the shape of the virtual line. 2n+1 (where n is a natural number) of the plurality of light-emitting elements are arranged. In this case, the plurality of light-emitting elements are arranged so as not to correspond to each other with respect to the center CP of the substrate 100. For example, if three light-emitting elements are provided, including a first light-emitting element 200a, a second light-emitting element 200b, and a third light-emitting element 200c, each of the first to third light-emitting elements 200a, 200b, and 200c is arranged corresponding to the center CP of the substrate 100. More specifically, the light-emitting surfaces 205a, 205b, and 205c of the first to third light-emitting elements 200a, 200b, and 200c are arranged to face the center CP of the substrate 100, but the light-emitting surfaces 205a, 205b, and 205c do not face each other in the second direction (horizontal direction). More specifically, the first to third light-emitting elements 200a, 200b, and 200c are arranged to intersect at the point where their respective optical axes coincide with the center CP of the substrate 100. As a result, the light emitted from the light source 200 is uniformly reflected in the direction set by the reflective layer 300 and the plurality of unit reflection patterns 320. Therefore, the lighting device 1000 can minimize light loss and provide light with uniform brightness in the upward direction.

[0098] Figure 12 is another cross-sectional view of the lighting device according to the embodiment. In the explanation using Figure 12, the explanation of components identical or similar to those of the lighting device described above will be omitted, and the same reference numerals will be assigned to identical or similar components.

[0099] Referring to Figure 12, the lighting device 1000 may include a light-shielding layer 600. The light-shielding layer 600 is placed on the resin layer 400. More specifically, the light-shielding layer 600 is placed on the upper surface of the resin layer 400 and between the resin layer 400 and the protective layer 500. The light-shielding layer 600 may include a first substrate 610 and a light-shielding pattern 630. The first substrate 610 is placed on the upper surface of the resin layer 400. The first substrate 610 may include a light-transmitting material. For example, the first substrate 610 may include at least one of PET (Polyethylene terephthalate), PS (Polystyrene), PI (Polyimide), PEN (Polyethylene naphthalate), and PC (Polycarbonate). The first substrate 610 may have a set thickness. For example, the thickness of the first substrate 610 may be approximately 150 μm or less. More specifically, the thickness of the first substrate 610 may be approximately 100 μm or less. More specifically, the thickness of the first substrate 610 may be approximately 20 μm to approximately 100 μm. The first substrate 610 may be provided in the form of a translucent film having a set thickness.

[0100] The light-shielding pattern 630 is placed on the first substrate 610. The light-shielding pattern 630 is placed on at least one of the surfaces of the first substrate 610 that is opposite to the resin layer 400, the lower surface and the upper surface opposite to the lower surface. For example, the light-shielding pattern 630 is placed on the lower surface of the first substrate 610. The light-shielding pattern 630 is printed in multiple layers on the lower surface of the first substrate 610. The light-shielding pattern 630 may also have a structure that includes multiple patterns having different sizes. When the light-shielding pattern 630 is viewed from above, the planar shape of the light-shielding pattern 630 can have various shapes such as circles, ellipses, and polygons. As an example, the planar shape of the light-shielding pattern 630 may have a curved shape considering the emission direction and directional angle of the light-emitting element, and may have a shape that extends along the emission direction of the light-emitting element.

[0101] The number of light-shielding patterns 630 may be greater than or equal to the number of light-emitting elements. The light-shielding patterns 630 are arranged in a region corresponding to the light source 200. Specifically, a portion of the light-shielding patterns 630 may overlap with the light source 200 in a first direction (vertical direction; z-axis direction). The light-shielding patterns 630 are also arranged in a region that does not overlap with the sensor 10 in a first direction. An adhesive layer 650 is arranged around the light-shielding patterns 630. The adhesive layer 650 is arranged between the resin layer 400 and the first substrate 610. The adhesive layer 650 is arranged on the lower surface of the first substrate 610 in a region where the light-shielding patterns 630 are not arranged. The adhesive layer 650 may include a light-transmitting adhesive material. The adhesive layer 650 can bond the resin layer 400 and the light-shielding layer 600. That is, the lighting device 1000 according to the embodiment includes the light-shielding layer 600, so that the uniformity characteristics of brightness can be improved. More specifically, the light-shielding layer 600 includes a light-shielding pattern 630, and the light-shielding pattern 630 is positioned in a region where light emitted from the light-emitting element is concentrated. As a result, the lighting device 1000 according to the embodiment can prevent the formation of a hot spot due to the light emitted from the light source 200.

[0102] Figure 13 is yet another cross-sectional view of the lighting device according to the embodiment. In the explanation using Figure 13, the explanation of components identical or similar to those of the lighting device described above will be omitted, and the same reference numerals will be assigned to identical or similar components.

[0103] Referring to Figure 13, an opening 105 is formed in the substrate 100. The opening 105 of the substrate 100 may be a hole that penetrates the upper surface facing the resin layer 400 and the lower surface facing the housing 30. The opening 105 can expose a portion of the upper surface of the housing 30. The opening 105 is formed in the central region of the substrate 100. The opening 105 is formed in the first region R1 of the substrate 100. The sensor 10 can overlap the opening 105 in a first direction. The opening 105 is also formed in the second region R2 of the substrate 100. Specifically, the opening 105 is not formed in the second-first region R2-1 where the light source 200 is located, but is formed in the second-second region R2-2 where the light source 200 is not located. The substrate 100 may have a donut shape with its central region penetrated by the opening 105. If the substrate 100 includes the opening 105 as described above, the position of the reflective layer 300 may differ from that of the embodiment described above. For example, the reflective layer 300 is not placed on the upper surface of the substrate 100, but on the housing 30 corresponding to the opening 105. More specifically, the reflective layer 300 is placed on the upper surface of the housing 30 exposed by the opening 105. The reflective layer 300 may have a planar shape corresponding to the opening 105 and may be provided with a corresponding width. That is, the reflective layer 300 is placed to cover the entire exposed upper surface of the housing 30. In this case, the lower surface of the reflective layer 300 is placed on the same plane as the lower surface of the substrate 100. Also, the upper surface of the reflective layer 300 is placed below the upper surface of the substrate 100. As a result, the light emitted from the light source 200 is effectively provided by the reflective layer 300. More specifically, by positioning the upper surface of the reflective layer 300 below the upper surface of the substrate 100, the light emitted from the light source 200 is effectively directed to the upper surface of the reflective layer 300, preventing it from entering the side surface of the reflective layer 300. Furthermore, since the substrate 100 includes an opening 105, the contact area between the resin layer 400 and the substrate 100 is increased.As a result, the substrate 100 and the resin layer 400 are more firmly bonded, and improved reliability can be achieved.

[0104] Figures 14 to 17 illustrate examples of how a lamp including the lighting device according to the embodiment is applied to a vehicle. Figure 14 is a top view of a vehicle to which the lamp with the lighting device according to the embodiment is applied, Figure 15 is an example in which the lamp with the lighting device is positioned at the front of the vehicle, and Figure 16 is an example in which the lighting device is positioned at the rear of the vehicle. Figure 17 is a drawing illustrating an example in which the lamp with the lighting device is applied to a logo, such as an emblem, located on the exterior of the vehicle.

[0105] Referring to Figures 14 to 17, the lighting device 1000 according to the embodiment can be applied to a vehicle 2000. The lamp is positioned at least one at one of the front, rear, and side of the vehicle 2000. For example, referring to Figure 15, the lamp can be applied to a front lamp 2100 of the vehicle. The front lamp 2100 may include at least one first lamp module 2120, which includes a first cover member 2110 and the lighting device 1000. The first cover member 2110 houses the first lamp module 2120 and may be made of a translucent material. The first cover member 2110 may have a curve depending on the design of the vehicle 2000 and may be provided as a flat or curved surface depending on the shape of the first lamp module 2120. The front lamp 2100 can provide multiple functions by controlling the timing of the operation of the lighting device 1000 included in the first lamp module 2120. For example, the front lamp 2100 can provide at least one of the following functions through the illumination of the lighting device 1000: headlight, turn signal, daytime running light, high beam, low beam, and fog lamp. Furthermore, the front lamp 2100 can provide additional functions such as a welcome light or celebration effect when the driver opens the vehicle door.

[0106] The forward lamp 2100 can detect objects located in front of it. Specifically, the forward lamp 2100 provides the light-emitting function described above and can also detect objects located in front of it using the sensor 10 of the lighting device 1000. Based on this, the forward lamp 2100 can provide functions such as FCA (Forward Collision-Avoidance Assist), SCC (Smart Cruise Control), and ACC (Adaptive Cruise Control).

[0107] Referring to Figure 16, the lamp can be applied to a vehicle's rear lamp 2200. The rear lamp 2200 may include at least one second lamp module 2220, which includes a second cover member 2210 and the lighting device 1000. The second cover member 2210 houses the second lamp module 2220 and may be made of a translucent material. The second cover member 2210 may have a curve depending on the design of the vehicle 2000 and may be provided as a flat or curved surface depending on the shape of the second lamp module 2220. The rear lamp 2200 can provide multiple functions by controlling the timing of the operation of the lighting device 1000 included in the second lamp module 2220. For example, the rear lamp 2200 can provide at least one of the functions of a side marker light, a brake light, and a turn signal light by the illumination of the lighting device 1000. The rear lamp 2200 can also detect objects located behind or to the rear side. More specifically, the rear lamp 2200 provides the light-emitting function described above, and at the same time, it can detect objects located behind or to the rear side using the sensor 10 of the lighting device 1000. Based on this, the rear lamp 2200 can provide functions such as BSD (Blind Spot Detection system) and rear side collision warning.

[0108] Referring to Figures 14 and 17, the lamp can be applied to a vehicle emblem lamp 2300. The emblem lamp 2300 is provided in at least one area of ​​the front, side, and rear of the vehicle 2000. The emblem lamp 2300 is provided at the front of the vehicle. For example, the emblem lamp 2300 is positioned in a central area at the front of the vehicle 2000, such as the radiator grille or bonnet. The emblem lamp 2300 can provide a variety of functions by controlling the timing of the operation of the lighting device 1000. As an example, the emblem lamp 2300 can emit light as shown in Figure 17(a). In this case, the emblem lamp 2300 can emit light in a shape corresponding to the shape of the transparent area 710 of the optical member 700. More specifically, the emblem lamp 2300 can emit light in the shape of an emblem symbolizing the manufacturer or brand of the vehicle 2000. Furthermore, when the emblem lamp 2300 is not emitting light as shown in Figure 17(b), the shape of the transparent area 710 and other parts of the interior of the emblem lamp 2300 are not visible from the outside of the vehicle 2000. Also, when the optical member 700 corresponds to the color of the vehicle 2000, the emblem lamp 2300 can be minimized or prevented from being visible from the outside, thus having a hidden effect.

[0109] The emblem lamp 2300 can detect objects located in front of it. More specifically, the emblem lamp 2300 provides the above-described light-emitting function and, at the same time, is positioned in the central area of ​​the front of the vehicle 2000 to more effectively detect objects located in front of it. Based on this, the emblem lamp 2300 can provide functions such as FCA (Forward Collision-Avoidance Assist), SCC (Smart Cruise Control), and ACC (Adaptive Cruise Control). That is, the lighting device 1000 and lamp according to the embodiment can effectively detect objects in front of it and provide uniform light in front of it by arranging the light source module so as to overlap with the sensor 10. More specifically, the lighting device 1000 can be configured so as not to overlap with the sensor 10, for example, the electrode pattern 150 and the light source 200. As a result, the lighting device 1000 can provide light with excellent brightness uniformity toward the front and prevent a decrease in detection accuracy.

[0110] The features, structures, and effects described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to a single embodiment. Furthermore, the features, structures, and effects exemplified in each embodiment can be combined or modified for implementation 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.

[0111] Furthermore, although the above description has focused on embodiments, these are merely illustrative examples and do not limit the present invention. Anyone with ordinary skill in the art to which the present invention belongs can make various modifications and applications not exemplified above, within the bounds of the essential characteristics of these embodiments. For example, each component specifically presented in the embodiments can be modified and implemented. Such differences in modifications and applications should be interpreted as being within the scope of the present invention as defined in the appended claims.

Claims

1. Sensors and A substrate placed on the aforementioned sensor, including an electrode pattern and an opening that penetrates the upper and lower surfaces, A housing disposed between the sensor and the substrate, A light source is placed on the substrate and electrically connected to the electrode pattern, A resin layer placed on the substrate, A reflective layer is placed on the upper surface of the housing corresponding to the opening and has a plurality of reflective pattern groups, The substrate includes a first region that overlaps with the sensor in a first direction perpendicular to the upper surface of the substrate, and a second region that surrounds the first region. The light source is placed on the second region, The plurality of reflection pattern groups are arranged on the first region, The opening is formed in the central region of the substrate that overlaps with the sensor in the first direction, The upper surface of the reflective layer is located below the upper surface of the substrate. The sensor does not overlap the light source and the electrode pattern in the first direction. The light source includes a plurality of light-emitting elements having light-emitting diodes, Each of the plurality of light-emitting elements includes a light-emitting surface parallel to the first direction, The plurality of light-emitting elements are embedded in the lower part of the resin layer in a lighting device.

2. The lighting device according to claim 1, wherein each of the plurality of reflection pattern groups includes a plurality of unit reflection patterns.

3. The second region includes a second-first region where the light source is located, and a second-second region located between the first region and the second-first region. The lighting device according to claim 2, wherein the plurality of unit reflection patterns are further arranged on the 2-2 region.

4. The lighting device according to claim 3, wherein the maximum spacing between the plurality of unit reflection patterns arranged on the first region is smaller than the maximum spacing between the plurality of unit reflection patterns arranged on the second-2 region.

5. The lighting device according to claim 3, wherein the size of the plurality of unit reflection patterns arranged on the first region is greater than the size of the plurality of unit reflection patterns arranged on the second-2 region.

6. The lighting device according to claim 3, wherein the plurality of unit reflection patterns do not overlap with the 2-1 region in the first direction.

7. The lighting device according to claim 1, wherein the plurality of light-emitting elements emit light toward the center of the substrate.

8. The light source includes a light-emitting group defined by a pair of light-emitting elements whose light-emitting surfaces face each other, among the plurality of light-emitting elements. The lighting device according to claim 7, wherein at least one light-emitting group is arranged on the substrate.

9. The lighting device according to claim 7, wherein the plurality of light-emitting elements are arranged along a virtual line that forms a polygon, a circle, or an ellipse.

10. The lighting device according to claim 9, wherein the plurality of light-emitting elements are arranged spaced apart along the virtual line.

11. The reflective layer includes n reflective pattern groups arranged along n (where n is an integer greater than 1) imaginary lines that form polygons, circles, or ellipses. Each of the n reflection pattern groups includes a plurality of unit reflection patterns arranged along the virtual line, The lighting device according to claim 1, wherein of the n virtual lines, the first line is defined as the outermost line and the nth line is defined as the innermost line.

12. As you move from the outermost line to the innermost line, the spacing between adjacent reflection pattern groups decreases. The lighting device according to claim 11, wherein the sensor does not overlap perpendicularly with the electrode pattern and the light source.

13. The lighting device according to claim 11, wherein the size of the unit reflection pattern forming the reflection pattern group increases from the outermost line to the innermost line.

14. The lighting device according to claim 11, wherein the density of the unit reflection pattern increases from the outermost line to the innermost line.

15. The lighting device according to claim 11, wherein the distance from the center of the substrate to each of the plurality of first reflection patterns forming the first reflection pattern group is constant or varies along the clockwise direction.

16. The lighting device according to claim 1, wherein the light source is not arranged in the first region.

17. The reflective layer includes an optical sheet, The illumination device according to claim 2, wherein the plurality of unit reflection patterns are arranged on the optical sheet.

18. The optical member, which is disposed on the resin layer and includes a transparent region and an opaque region, The optical component is separated from the resin layer, The lighting device according to claim 1, wherein the separation distance between the substrate and the sensor is greater than the separation distance between the resin layer and the optical member.

19. The material further includes a light-shielding layer disposed between the resin layer and the optical member, The light-shielding layer includes a first substrate and a light-shielding pattern disposed on the first substrate. The lighting device according to claim 18, wherein a portion of the light-shielding pattern overlaps perpendicularly with the light source.

20. The lighting device according to claim 18, wherein the width of the transparent region is greater than the width of the first region.

Images