Lighting fixtures and lamps including lighting fixtures

Abstract

The lighting device according to the embodiment includes: a substrate, a light-emitting element disposed on the substrate, a first reflective member disposed on the substrate, a resin layer disposed on the first reflective member, and a wavelength conversion layer disposed on the resin layer, wherein the resin layer includes a first resin layer, a second resin layer spaced apart from the first resin layer, and a third resin layer disposed between the first resin layer and the second resin layer; the wavelength conversion layer includes a first wavelength conversion layer disposed on the first resin layer and a second wavelength conversion layer disposed on the second resin layer, and the height of the second resin layer is different from the height of the first resin layer; and the light-emitting element can be disposed in a region that does not overlap perpendicularly with the second resin layer and the third resin layer but overlaps perpendicularly with the first layer.

Description

Technical Field

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

[0002] Lighting is a device that provides or controls the amount of light and is used in various fields. For example, lighting devices can be used in various fields, such as vehicles and buildings, to illuminate the interior or exterior.

[0003] In particular, in recent years, light-emitting devices have been used as lighting sources. Such devices, such as light-emitting diodes (LEDs), offer advantages over traditional light sources like fluorescent and incandescent lamps, including lower power consumption, longer lifespan, faster response times, greater safety, and environmental friendliness. LEDs are being used in various optical components, such as displays, indoor lighting, and outdoor lighting.

[0004] Generally, lights of various colors and shapes are used in vehicles, and recently, lights using light-emitting diodes (LEDs) as vehicle light sources have been proposed. For example, LEDs are being used in car headlights, taillights, turn signals, and emblems. However, such LEDs have a problem: the exit angle of the emitted light is relatively small. For this reason, when LEDs are used as vehicle lights, there is a need to increase the light-emitting area of ​​the lamp.

[0005] Furthermore, when the lamp includes a light-emitting diode (LED), there is a problem where the light emitted by the LED forms hot spots. In this case, when using this lamp to implement a surface light source, there is a problem of deterioration in the uniformity characteristics of the light-emitting surface.

[0006] Furthermore, when LEDs are used in automotive lights, there is generally a problem with their visual recognition from the outside. For example, when the lights are on, they may not be recognizable by the light emitted from the source, but when the lights are off, the LEDs are visible from the outside. This degrades the aesthetics and design freedom of the automotive lights.

[0007] Furthermore, light-emitting diodes (LEDs) can be used as lights, such as for emblems or signs located on the front or rear of a vehicle. In this case, the emblem or sign can be visually identified from the outside by the light emitted by the LED. However, since emblems or signs located on the exterior of a vehicle are placed in a limited space, there is a problem that it is difficult to achieve various colors. In addition, when increasing the size of the emblem or sign to achieve various colors, there is a potential problem of interference with radar located on the front or rear.

[0008] Therefore, new lighting devices and lamps are needed to solve the above problems. Summary of the Invention

[0009] [Technical Issues]

[0010] The embodiments provide lighting devices and lamps with improved luminous intensity.

[0011] Furthermore, this embodiment provides an illumination device and lamp that can realize uniform line light sources and surface light sources.

[0012] Furthermore, this embodiment provides a lighting device and a lamp that can emit light of various wavelength bands using a light-emitting device that emits light of a single wavelength band.

[0013] Furthermore, this embodiment provides lighting devices and lamps that can improve design freedom and aesthetics.

[0014] [Technical Solutions]

[0015] The lighting device according to the embodiment includes a substrate, a light-emitting device disposed on the substrate, a first reflective member disposed on the substrate, a resin layer disposed on the first reflective member, and a wavelength conversion layer disposed on the resin layer. The resin layer includes a first resin layer, a second resin layer spaced apart from the first resin layer, and a third resin layer disposed between the first resin layer and the second resin layer. The wavelength conversion layer includes a first wavelength conversion layer disposed on the first resin layer and a second wavelength conversion layer disposed on the second resin layer. The height of the second resin layer is different from the height of the first resin layer. The light-emitting device can be disposed in a region that does not overlap with the second resin layer and the third resin layer in the vertical direction but overlaps with the first resin layer in the vertical direction.

[0016] Furthermore, the height of the second resin layer can be lower than the height of the first resin layer.

[0017] In addition, the height of the third resin layer may include a region that increases from the first resin layer to the second resin layer.

[0018] In addition, the upper surface of the third resin layer may include at least one of a flat surface and a curved surface.

[0019] In addition, a first diffusion layer may be included between the first resin layer and the first wavelength conversion layer.

[0020] In addition, the second wavelength conversion layer may include at least one of phosphors and quantum dots for converting light into wavelength bands that are different from those of the first wavelength conversion layer.

[0021] In addition, the lighting device includes a second reflective member disposed on the outer surface of the resin layer, wherein the second reflective member may be disposed on at least one of the side surface of the first resin layer, the side surface of the second resin layer, and the upper surface of the third resin layer.

[0022] Furthermore, when the second reflective member is disposed on the side surface of the first resin layer, the second reflective member facing the upper surface of the third resin layer may include an open area that exposes a portion of the side surface of the first resin layer.

[0023] The light-emitting device may include sub-light-emitting devices spaced apart from the light-emitting device, wherein the sub-light-emitting devices may be disposed in a region that does not overlap with the second resin layer and the third resin layer in the vertical direction but overlaps with the first resin layer in the vertical direction.

[0024] Furthermore, the light-emitting surface of the sub-light-emitting device can have a different orientation than the light-emitting surface of the light-emitting device.

[0025] [Beneficial Effects]

[0026] The lighting device and lamp according to this embodiment can have improved light characteristics. Specifically, the lighting device and lamp may include a light-emitting device, a reflective member, and a resin layer to minimize light loss during its outward emission. Therefore, the lighting device according to this embodiment can achieve both uniform line light sources and uniform surface light sources.

[0027] Furthermore, the lighting device and lamp according to this embodiment can emit a first light corresponding to a shape with relatively high brightness by realizing a first region in the shape of a shape such as a Hangul, letter, number, graphic, or character. Additionally, the lighting device can emit a second and a third light by using a second and a third region with lower brightness than the first region, the brightness of the second and third light decreasing with increasing distance from the light-emitting device. Therefore, the lighting device can emit light of various wavelength bands using a light-emitting device that emits light of a single wavelength band. Furthermore, the brightness of the second and third light can decrease in a gradual manner, thereby allowing the lighting device to have improved aesthetics.

[0028] Furthermore, the lighting device and lamp according to this embodiment can emit light of various wavelength bands using a single-wavelength light-emitting device, and can be configured as a slender structure with a simple structure. Therefore, even when the lighting device is applied as a lamp in a limited area, such as an emblem or sign set on the exterior of a vehicle, interference with other components (such as radar) can be prevented, thereby allowing for improved design freedom. Attached Figure Description

[0029] Figure 1 and Figure 2 This is a cross-sectional view of the lighting device according to the embodiment.

[0030] Figure 3 This is a top view of the reflective member according to the embodiment.

[0031] Figure 4 and Figure 5 This is a cross-sectional view used to illustrate a modified example of the first resin layer according to the embodiment.

[0032] Figures 6 to 8 These are other cross-sectional views of the lighting device according to the embodiment.

[0033] Figure 9 It shows the basis Figures 1 to 8 An example diagram of the luminous pattern of a lighting device.

[0034] Figure 10 This is another cross-sectional view of the lighting device according to the embodiment.

[0035] Figure 11 It shows the basis Figure 10 An example diagram of the luminous pattern of a lighting device.

[0036] Figure 12 This is a diagram illustrating an example of a lamp, including a lighting device according to an embodiment, being applied to a vehicle. Detailed Implementation

[0037] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0038] The technical spirit of this invention is not limited to the embodiments described, but can be implemented in various other forms, and one or more components can be selectively combined and substituted within the scope of the technical spirit of this invention. Furthermore, the terminology used in the embodiments of this invention (including technical and scientific terms), unless specifically defined and explicitly described, can be interpreted in the sense that is generally understood by one of ordinary skill in the art to which this invention pertains. Commonly used terms, such as those defined in dictionaries, should be interpreted in the context of the relevant art. Moreover, the terminology used in the embodiments of this invention is for explaining the embodiments, not for limiting the invention. In this specification, the singular form may also include the plural form, and unless otherwise specifically stated in the phrase, when referring to at least one (or more) of A and / or B, C, it may include one or more of all combinations that can be combined with A, B, and C. When describing components of embodiments of this invention, terms such as first, second, A, B, (a), and (b) may be used. Such terms are only for distinguishing components from other components and should not determine the nature, order, or process of the corresponding constituent elements. Furthermore, when describing a component as "connected," "coupled," or "joined" to another component, this description can include not only direct connection, coupling, or joining to another component, but also connection, coupling, or joining between the component and another component via another component. Additionally, when described as being formed or disposed "above" or "below" each component, this description includes not only when the two components are in direct contact with each other, but also when one or more other components are formed or disposed between the two components. Furthermore, when indicated as "above" or "below," it can refer to both a downward and upward direction relative to a single element.

[0039] The lighting device according to the present invention can be applied to various lighting devices requiring illumination, such as vehicle lights, household lighting devices, or industrial lighting devices. For example, when applied to vehicle lights, it is suitable for headlights, side lights, side mirrors, fog lights, taillights, brake lights, daytime running lights, vehicle interior lights, door panels, rear combination lights, backup lights, etc. The lighting device of the present invention can be applied to indoor and outdoor advertising devices, display devices, and various electric vehicle fields. Furthermore, it can be applied to all lighting-related or advertising-related fields that are currently developed and commercialized or that may be realized according to future technological developments.

[0040] Furthermore, in the description of the embodiments of the present invention, the first direction may refer to the X-axis direction shown in the figure, and the second direction may be a direction different from the first direction. For example, the second direction may refer to the Y-axis direction perpendicular to the first direction shown in the figure. In addition, the horizontal direction may refer to the first direction and the second direction, while the vertical direction may refer to a direction perpendicular to at least one of the first direction and the second direction. For example, the horizontal direction may refer to the X-axis and Y-axis directions in the figure, while the vertical direction may be the Z-axis direction in the figure and a direction perpendicular to the X-axis and Y-axis directions.

[0041] Figure 1 and Figure 2 This is a cross-sectional view of the lighting device according to the embodiment, and Figure 3 This is a top view of the reflective member according to this embodiment.

[0042] Reference Figures 1 to 3 The lighting device 1000 according to the embodiment may include a substrate 100, a light-emitting device 200, a first reflective member 300, a resin layer 400, and a wavelength conversion layer 600.

[0043] The lighting device 1000 can emit light emitted from the light-emitting device 200 as a surface light source. The lighting device 1000 can be defined as a light-emitting unit, a lighting module, or a light source module. The lighting device 1000 may include one or more light-emitting units on the substrate 100.

[0044] Substrate 100 may include a printed circuit board (PCB). Substrate 100 may include at least one of, for example, a resin-based printed circuit board (PCB), a metal-core PCB, a flexible PCB, a ceramic PCB, and an FR-4 substrate. When substrate 100 is configured as a metal-core PCB having a metal layer disposed on its bottom, the heat dissipation efficiency of the light-emitting device 200 can be improved. Additionally, substrate 100 may include a light-transmitting material. Specifically, substrate 100 may include a material that transmits light through its upper and lower surfaces. Substrate 100 may include at least one of polyethylene terephthalate (PET), polystyrene (PS), polyimide (PI), polyethylene naphthalate (PEN), and polycarbonate (PC).

[0045] The substrate 100 can be electrically connected to the light-emitting device 200. The substrate 100 includes a wiring layer (not shown) thereon, and the wiring layer can be electrically connected to the light-emitting device 200. When multiple light-emitting devices 200 are arranged on the substrate 100, the multiple light-emitting devices 200 can be connected in series, in parallel, or in a series-parallel connection through the wiring layer. The substrate 100 can be used as a base member or support member disposed under the light-emitting device 200 and the resin layer 400.

[0046] The light-emitting device 200 can be disposed on the substrate 100. The light-emitting device 200 is a device including a light-emitting diode (LED) and may include a package encapsulating the light-emitting chip. The light-emitting chip can emit at least one type of visible light, such as blue light, red light, green light, yellow light, ultraviolet (UV) light, and infrared light, while the light-emitting device 200 can emit at least one type of visible light, such as white light, blue light, red light, yellow light, green light, ultraviolet light, and infrared light. The light-emitting device 200 can be a top-view type with the light-emitting surface facing upwards. That is, the optical axis of the light-emitting device 200 can be perpendicular to the upper surface of the substrate 100.

[0047] Furthermore, the light-emitting device 200 is an LED chip that emits light from at least five surfaces and can be disposed on the substrate 100 in a flip-chip configuration. Alternatively, the light-emitting device 200 can be a horizontal chip or a vertical chip. In a horizontal chip, two different electrodes can be arranged horizontally, while in a vertical chip, two different electrodes can be arranged vertically. Since the light-emitting device 200 is connected to another chip or wiring pattern by wiring in the case of horizontal or vertical chips, the thickness of the module may increase due to the height of the wiring, and pad space may be required for bonding the wiring.

[0048] The light-emitting device 200 can be electrically connected to the substrate 100. For example, the light-emitting device 200 can be electrically connected to the pads (not shown) of the substrate 100 via a conductive bonding member (not shown) to the substrate 100. The conductive bonding member can be a soldering material or a metallic material.

[0049] The thickness of the light-emitting device 200 can be about 3 mm or less. Specifically, the thickness of the light-emitting device 200 can be from about 0.1 mm to about 2.5 mm. Furthermore, the length of the light-emitting device 200 in the first direction can be different from or equal to the length in the second direction.

[0050] At least one light-emitting device 200 may be disposed on the substrate 100. For example, one or more light-emitting devices 200 may be disposed in a region perpendicularly overlapping with the first resin layer 410, which will be described later. When there are multiple light-emitting devices 200, the light-emitting devices 200 may be spaced apart from each other in a first direction or a second direction. Furthermore, the multiple light-emitting devices 200 may emit light of the same wavelength band.

[0051] The light-emitting device 200 may include a light-emitting surface (not shown) from which light is emitted. The light-emitting surface is the surface on which the strongest light is emitted, and the light-emitting surface may be disposed on the upper surface of the light-emitting device 200. Here, the upper surface of the light-emitting device 200 may be the surface facing the upper surface of the resin layer 400. That is, the light-emitting device 200 may emit the highest intensity light in a third direction (e.g., the vertical direction or the Z-axis direction). The light-emitting surface may be a vertical plane, or may include a concave or convex surface. Furthermore, the light-emitting device 200 may have a defined directional angle. For example, the light-emitting device 200 may have a directional angle of approximately 100 degrees or greater. Specifically, the directional angle of the light-emitting device 200 may be approximately 120 degrees to approximately 140 degrees.

[0052] Light emitted from the light-emitting device 200 can travel towards the upper surface of the resin layer 400. Furthermore, a portion of the emitted light can be reflected by the first reflective member 300 and travel towards the upper surface of the resin layer 400. Additionally, another portion of the emitted light can be emitted through the side surface of the resin layer 400 to the outside of the resin layer 400.

[0053] The first reflective member 300 may be disposed on the substrate 100. Specifically, the first reflective member 300 may be disposed between the substrate 100 and the resin layer 400.

[0054] The first reflective member 300 can be provided in the form of a film made of metallic or non-metallic material. The first reflective member 300 can be adhered to the upper surface of the substrate 100. The first reflective member 300 can have an area smaller than the area of ​​the upper surface of the substrate 100. The first reflective member 300 can be spaced apart from the edge of the substrate 100, and the resin layer 400 can be attached to the substrate 100 within the spaced area. Therefore, peeling off the edge portion of the first reflective member 300 can be prevented.

[0055] The first reflective member 300 may include an opening 301 in which the lower portion of the light-emitting device 200 is disposed. The portion of the upper surface of the substrate 100 to which the lower portion of the light-emitting device 200 is joined may be disposed within the opening 301 of the first reflective member 300. The size of the opening 301 may be the same as or larger than the size of the light-emitting device 200, but is not limited thereto. The first reflective member 300 may contact the upper surface of the substrate 100, or may adhere between the resin layer 400 and the substrate 100, but is not limited thereto. Here, when a highly reflective material is coated on the upper surface of the substrate 100, the first reflective member 300 may be omitted.

[0056] The first reflective member 300 may be formed to have a thickness smaller than that of the light-emitting device 200. The thickness of the first reflective member 300 may include a range of 0.2 mm ± 0.02 mm. The lower part of the light-emitting device 200 may pass through the opening 301 of the first reflective member 300, and the upper part of the light-emitting device 200 may protrude. The emitting surface of the light-emitting device 200 may be provided in a direction perpendicular to the upper surface of the first reflective member 300.

[0057] The first reflective member 300 may include a metallic or non-metallic material. The metallic material may include metals such as aluminum, silver, or gold. The non-metallic material may include a plastic or resin material. The plastic material may be selected from polyethylene, polypropylene, polystyrene, polyvinyl chloride, polychlorinated biphenyl, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polybutylene terephthalate, polynaphthalene ester, polyamide, polyacetal, polyphenylene ether, polyamide-imide, polyether-imide, polyetheretherketone, polyimide, polytetrafluoroethylene, liquid crystal polymers, fluorine, copolymers thereof, and mixtures thereof. The resin material may include a reflective material, such as a metal oxide in silicon or epoxy resin, such as TiO2, Al2O3, or SiO2. The first reflective member 300 may be implemented as a single layer or multiple layers, and the light reflection efficiency can be improved through such a layered structure. According to this embodiment, the first reflective member 300 reflects incident light, thereby increasing the light intensity and causing the light to be emitted in a uniformly distributed manner.

[0058] The first reflective member 300 may include an adhesive layer (not shown), a reflective layer (not shown), and a plurality of points 305.

[0059] An adhesive layer can attach the first reflective member 300 to the upper surface of the substrate 100. The adhesive layer is a transparent material and can be an adhesive such as a UV adhesive, silicone resin, or epoxy resin.

[0060] The reflective layer may include multiple reflectors (not shown) within a resin material. The reflectors may be air bubbles, such as air, or a medium having the same refractive index as air. The resin material of the reflective layer may be a material such as silicone or epoxy resin, and the reflective agent may be formed by injecting air bubbles into the resin material. The reflective layer may reflect light incident from the multiple reflectors or refract it in different directions. The thickness of the reflective layer may be 80% or more of the thickness of the first reflective member 300.

[0061] Multiple points 305 can be configured to protrude from the upper surface of the first reflective member 300. For example, multiple points 305 can be configured to protrude from the upper surface of the reflective layer. Multiple points 305 can be spaced apart from the light-emitting device 200 and can be configured to surround the periphery of the light-emitting device 200.

[0062] Multiple dots 305 can be formed on the reflective layer by printing. The multiple dots 305 may include reflective ink. The multiple dots 305 can be printed using any of the following materials: TiO2, CaCO3, BaSO4, Al2O3, silicon, and PS. The planar shape of each of the multiple dots 305 can be selected from circles, ellipses, and polygons. Furthermore, each of the multiple dots 305 can have a hemispherical or polygonal cross-section. The material of the multiple dots 305 can be white.

[0063] The dot pattern density of the plurality of dots 305 can increase with increasing distance from the light-emitting device 200. For example, the dot pattern density per unit area can increase with increasing distance from the optical axis of the light-emitting device 200 in the horizontal direction. Furthermore, the size of the plurality of dots 305 can change with increasing distance from the light-emitting device 200. For example, the horizontal width of the plurality of dots 305 can increase with increasing distance from the optical axis of the light-emitting device 200 in the horizontal direction.

[0064] In other words, since multiple points 305 are set on the path of light emitted from the light-emitting device 200 and / or light emitted from the light-emitting device 200 and reflected in other components, light reflectivity can be improved, light loss can be reduced, and the brightness of the surface light source can be improved.

[0065] The resin layer 400 may be disposed on the substrate 100. The resin layer 400 may face the substrate 100. The resin layer 400 may be disposed on all or part of the upper surface of the substrate 100. The area of ​​the lower surface of the resin layer 400 may be the same as or larger than the area of ​​the upper surface of the substrate 100.

[0066] The resin layer 400 can be formed of a transparent material. The resin layer 400 can include resin materials such as silicone or epoxy resin. The resin layer 400 can include thermosetting resin materials, such as, optionally, PC, OPS, PMMA, PVC, etc. The resin layer 400 can be formed of glass, but is not limited thereto. For example, the main material of the resin layer 400 can be a resin material having a polyurethane acrylate oligomer as the main material. For example, a mixture of a polyurethane acrylate oligomer as the synthetic oligomer and a polymer type as a polyacrylate can be used. Of course, it can also include monomers mixed with low-boiling-point diluent reactive monomers such as IBOA (isobutylene acrylate), HPA (hydroxypropyl acrylate, 2-HEA (hydroxyethyl acrylate)), etc., and can be mixed with photoinitiators (such as 1-hydroxycyclohexylphenyl ketone, etc.) or antioxidants as additives.

[0067] The resin layer 400 can have a set refractive index. For example, the refractive index of the resin layer 400 can be from about 1.4 to about 1.8. Since the resin layer 400 is configured as a resin layer for guiding light, it can be configured to be thinner than in the case of glass, and can be configured as a flexible plate. The resin layer 400 can emit a point light source emitted from the light-emitting device 200 in the form of a line light source or a surface light source.

[0068] The upper surface of the resin layer 400 can emit light by diffusing light emitted from the light-emitting device 200. For example, beads (not shown) may be included in the resin layer 400, and the beads can diffuse and reflect incident light to increase the light intensity. The beads may be arranged in an amount from 0.01% to 0.3% based on the weight of the resin layer 400. The beads may be composed of any material selected from silicon, silica, glass bulbs, polymethyl methacrylate (PMMA), polyurethane, Zn, Zr, Al2O3, and acrylic acid, and the particle diameter of the beads may be in the range of about 1 μm to about 20 μm, but is not limited thereto.

[0069] Since the resin layer 400 is disposed on the light-emitting device 200, the light-emitting device 200 can be protected and the loss of light emitted from the light-emitting device 200 can be reduced. The light-emitting device 200 can be embedded in the lower part of the resin layer 400.

[0070] The resin layer 400 can contact the surface of the light-emitting device 200 and the emitting surface of the light-emitting device 200. A portion of the resin layer 400 can be disposed in the opening 301 of the first reflective member 300. A portion of the resin layer 400 can contact the upper surface of the substrate 100 through the opening 301 of the first reflective member 300. Therefore, a portion of the resin layer 400 contacts the substrate 100, thereby fixing the first reflective member 300 between the resin layer 400 and the substrate 100.

[0071] The resin layer 400 can be formed to have a thickness greater than that of the light-emitting device 200. For example, the thickness of the resin layer 400 can be about 1 mm or more. Specifically, the resin layer 400 can have a thickness of about 1 mm to about 10 mm. When the thickness of the resin layer 400 is less than about 1 mm, the light emitted from the light-emitting device 200 may not be effectively guided. Therefore, it may be difficult for the uniform illumination device 1000 to achieve a uniform surface light source. Furthermore, when the thickness of the resin layer 400 is less than about 1 mm, it may be difficult to effectively protect the light-emitting device 200, and the adhesion between the substrate 100 and the first reflective member 300 may be very low. In addition, when the thickness of the resin layer 400 exceeds about 10 mm, light loss may occur due to the increased travel path of the light emitted from the light-emitting device 200, and the brightness of the surface light source may decrease. Therefore, the thickness of the resin layer 400 preferably meets the above-described range.

[0072] Furthermore, the vertical height from the upper surface of the resin layer 400 to the upper surface of the light-emitting device 200 can be greater than the thickness of the light-emitting device 200. For example, the height from the upper surface of the resin layer 400 to the upper surface of the light-emitting device 200 can be approximately 3 to approximately 15 times the thickness of the light-emitting device 200. The thicknesses of the resin layer 400 and the light-emitting device 200 satisfy the aforementioned ranges to effectively guide the point light source emitted from the light-emitting device 200, emitting it in the form of a line light source or a surface light source.

[0073] The resin layer 400 may include multiple resin layers. Specifically, the resin layer 400 may include a first resin layer 410, a second resin layer 420, and a third resin layer 430.

[0074] The first resin layer 410 may be disposed in a region corresponding to the light-emitting device 200. Specifically, the first resin layer 410 may be disposed in a region that overlaps with the light-emitting device 200 in the vertical direction.

[0075] The first resin layer 410 may have a predetermined horizontal width. For example, the horizontal width of the first resin layer 410 may be greater than the horizontal width of the light-emitting device 200.

[0076] Furthermore, the first resin layer 410 may have a predetermined height. The first resin layer 410 may have a constant height. The height of the first resin layer 410 may be higher than the height of the light-emitting device 200. Therefore, the first resin layer 410 may be configured to cover the light-emitting device 200.

[0077] The second resin layer 420 may be spaced apart from the first resin layer 410. For example, the second resin layer 420 may be spaced apart from the first resin layer 410 in the horizontal direction. The second resin layer 420 may comprise the same material as the first resin layer 410.

[0078] The second resin layer 420 may be spaced apart from the light-emitting device 200. Specifically, the second resin layer 420 may be spaced apart from the light-emitting device 200 in the horizontal direction but not overlap in the vertical direction.

[0079] The second resin layer 420 may have a predetermined height. The second resin layer 420 may have a constant height. Specifically, the second resin layer 420 may have a different height than the first resin layer 410. For example, the height h2 of the second resin layer 420 may be lower than the height of the first resin layer 410. The height h2 of the second resin layer 420 may be less than or equal to approximately 80% of the height of the first resin layer 410. When the height h2 of the second resin layer 420 exceeds approximately 80% of the height of the first resin layer 410, the path of light emitted from the light-emitting device 200 increases, and light may have difficulty reaching the upper surface of the second resin layer 420. Therefore, the height h2 of the second resin layer 420 can preferably satisfy the above-mentioned range.

[0080] The third resin layer 430 may be disposed between the first resin layer 410 and the second resin layer 420. The third resin layer 430 may comprise the same material as the first resin layer 410. Furthermore, the third resin layer 430 may comprise the same material as the second resin layer 420.

[0081] The third resin layer 430 may be spaced apart from the light-emitting device 200. Specifically, the third resin layer 430 may be spaced apart from the light-emitting device 200 in the horizontal direction but not overlap in the vertical direction.

[0082] The third resin layer 430 can be physically connected to the first resin layer 410 and the second resin layer 420. That is, the first resin layer 410, the second resin layer 420 and the third resin layer 430 can be formed as a single unit.

[0083] The third resin layer 430 may have a predetermined height. Specifically, the height of the third resin layer 430 may increase from the first resin layer 410 towards the second resin layer 420. Therefore, the spacing between the upper surface 431 and the lower surface of the third resin layer 430 increases from the first resin layer 410 towards the second resin layer 420. The upper surface 431 of the third resin layer 430 may be flat. The upper surface 431 of the third resin layer 430 may be inclined relative to the lower surface of the third resin layer 430. For example, the inclination angle formed by the upper and lower surfaces of the third resin layer 430 may be from approximately 20 degrees to approximately 70 degrees.

[0084] The third resin layer 430 may have a first height h1 in the region connected to the first resin layer 410 and a second height h2 in the region connected to the second resin layer 420. Here, the first height h1 may be the minimum height of the third resin layer 430, and the second height h2 may be the maximum height of the third resin layer 430. Furthermore, the second height h2 may correspond to the height of the second resin layer 420.

[0085] Furthermore, the first height h1 can be changed according to the refractive index of the resin layer 400 and the directional angle of the light-emitting device 200. For example, the first height h1 can satisfy the following equation 1.

[0086] [Formula 1]

[0087]

[0088] In Equation 1, θ refers to the directional angle of the light-emitting device 200, and d1 refers to the distance from the optical axis of the light-emitting device 200 to the third resin layer 430. Furthermore, in Equation 1, Na is the refractive index of the medium located outside the lighting device 1000, specifically the refractive index of air, and Nr refers to the refractive index of the resin layer 400.

[0089] In other words, the third resin layer 430 may have a first height h1 that satisfies the aforementioned range in the region in contact with the first resin layer 410. Therefore, light emitted from the light-emitting device 200 can be provided to the first resin layer 410, the second resin layer 420, and the third resin layer 430 for emission to the outside.

[0090] Wavelength conversion layer 600 can be disposed on resin layer 400. Wavelength conversion layer 600 may include multiple layers.

[0091] For example, the wavelength conversion layer 600 may include a first wavelength conversion layer 610 disposed on the first resin layer 410. The first wavelength conversion layer 610 may be disposed in the region corresponding to the first resin layer 410 and the light-emitting device 200.

[0092] The first wavelength conversion layer 610 may include a wavelength conversion material. For example, the first wavelength conversion layer 610 may include at least one wavelength conversion material selected from phosphors and quantum dots. For example, the first wavelength conversion layer 610 may include a phosphor and may emit white, blue, yellow, green, and red light. The phosphor may include at least one or two selected from green phosphors, red phosphors, amber phosphors, yellow phosphors, white phosphors, and blue phosphors. The phosphor may include at least one selected from YAG-based phosphors, TAG-based phosphors, silicate-based phosphors, sulfide-based phosphors, and nitride-based phosphors.

[0093] The first wavelength conversion layer 610 can absorb light emitted from the light-emitting device 200 and convert it into first light L1 of a first wavelength band. Specifically, the first wavelength conversion layer 610 can absorb light incident through the first resin layer 410 from the light emitted from the light-emitting device 200 and convert it into first light L1. Furthermore, the first wavelength conversion layer 610 can absorb light reflected by the first reflective member 300 from the light emitted from the light-emitting device 200 and convert it into first light L1.

[0094] In addition, the wavelength conversion layer 600 may include a second wavelength conversion layer 620 disposed on the second resin layer 420.

[0095] The second wavelength conversion layer 620 may include a wavelength conversion material. For example, the second wavelength conversion layer 620 may include at least one wavelength conversion material selected from phosphors and quantum dots. For example, the second wavelength conversion layer 620 may include a phosphor and may emit white, blue, yellow, green, and red light. The phosphor may include at least one or two selected from green phosphors, red phosphors, amber phosphors, yellow phosphors, white phosphors, and blue phosphors. The phosphor may include at least one selected from YAG-based phosphors, TAG-based phosphors, silicate-based phosphors, sulfide-based phosphors, and nitride-based phosphors. The second wavelength conversion layer 620 may include a material different from the material of the first wavelength conversion layer 610. The second wavelength conversion layer 620 may include a material for converting light in a wavelength band different from the wavelength band of the first wavelength conversion layer 610.

[0096] The second wavelength conversion layer 620 can absorb light emitted from the light-emitting device 200 and convert it into a second light L2 of a second wavelength band. Specifically, the second wavelength conversion layer 620 can absorb light incident through the third resin layer 430 and the second resin layer 420 from the light emitted from the light-emitting device 200 and convert it into the second light L2. Furthermore, the second wavelength conversion layer 620 can absorb light reflected by the first reflective member 300 disposed in the region corresponding to the third resin layer 430 and the second resin layer 420 and convert it into the second light L2. Here, the second light L2 of the second wavelength band can have a different color than the first light L1 of the first wavelength band.

[0097] The lighting device 1000 may further include a first diffusion layer 510. The first diffusion layer 510 may be disposed between the first resin layer 410 and the first wavelength conversion layer 610. The first diffusion layer 510 can uniformly diffuse light emitted through the first resin layer 410. Furthermore, since certain colors may not be mixed when the light intensity is high, the first diffusion layer 510 can diffuse and mix light.

[0098] The first diffusion layer 510 may include beads (not shown). The beads can diffuse and reflect incident light, thereby increasing the amount of light. The beads may be composed of any material selected from silicon, silica, glass bulb, polymethyl methacrylate (PMMA), polyurethane, Zn, Zr, Al2O3, and acrylic acid, and the particle diameter of the beads may be in the range of about 1 μm to about 20 μm, but is not limited thereto.

[0099] The lighting device 1000 according to this embodiment may include multiple regions. For example, the lighting device 1000 may include a first region R1 corresponding to the first resin layer 410, a second region R2 corresponding to the second resin layer 420, and a third region R3 corresponding to the third resin layer 430.

[0100] The lighting device 1000 can emit light of various wavelength bands depending on the region. For example, a first light L1 emitted by the first wavelength conversion layer 610 can be emitted from the first region R1, while a second light L2 emitted by the second wavelength conversion layer 620 can be emitted from the second region R2. Here, the first light L1 and the second light L2 can be light of wavelength bands different from the light emitted from the light-emitting device 200.

[0101] Furthermore, for example, the third region R3 can emit a third light L3 that is different from the first light L1 and the second light L2, and can emit light with the same wavelength band as the light emitted from the light-emitting device 200. Specifically, since the first height h1 of the third resin layer 430 satisfies the aforementioned range, a portion of the light emitted from the light-emitting device 200 can be emitted to the outside through the side surface 411 of the first resin layer 410 facing the upper surface 431 of the third resin layer 430. In this case, the light emitted through the side surface 411 of the first resin layer 410 can be defined as the third light L3, and a portion of the third light L3 can be reflected onto the upper surface 431 of the third resin layer 430.

[0102] In this configuration, the first reflective member 300 disposed in the regions corresponding to the second region R2 and the third region R3 may include a plurality of dots 305. In this configuration, the pattern density of the plurality of dots 305 may increase with increasing distance from the first resin layer 410. Furthermore, the size of the plurality of dots 305 may increase with increasing distance from the first resin layer 410. Therefore, the lighting device 1000 according to this embodiment effectively emits light to the second resin layer 420 and the third resin layer 430 using only the light-emitting device 200 disposed in the first region R1, and can emit light of various colors outwards.

[0103] Therefore, the lighting device 1000 according to this embodiment can emit light of various wavelength bands by providing a light-emitting device 200 that emits light of a set wavelength band in a single region (i.e., the first region R1). Furthermore, the lighting device 1000 can adjust the width and / or height of the second resin layer 420 and the third resin layer 430 on the second region R2 and the third region R3, and can adjust the brightness of the light emitted from the second region R2 and the third region R3.

[0104] For example, the brightness emitted by the first region R1 is higher than that emitted by the second region R2 and the third region R3, and is implemented in the form of Korean letters, English letters, numbers, graphics, characters, etc., and can emit a first light L1 corresponding to that form. In addition, the second region R2 and the third region R3 can emit a second light L2 and a third light L3, the brightness of which gradually decreases as the distance from the light-emitting device 200 increases, and the lighting device 1000 can have an improved aesthetic.

[0105] Figure 4 and Figure 5 This is a cross-sectional view used to illustrate a modified example of the first resin layer according to this embodiment. In use Figure 4 and Figure 5 In the description, descriptions of parts that are the same as or similar to the above-described lighting device are omitted, and the same reference numerals are assigned to the same and similar parts.

[0106] First, refer to Figure 4 The upper surface of the first resin layer 410 may have an upwardly projecting shape. The upper surface of the first resin layer 410 may have at least one inclined surface, and this inclined surface may have a flat or curved shape. For example, the upper surface of the first resin layer 410 may have, for example, a... Figure 4 The "reverse V" shape shown.

[0107] In this case, the tilt angle formed by the upper surface of the first resin layer 410 can be from about 120 degrees to about 170 degrees. When the tilt angle is less than about 120 degrees, the first light L1 can mix with the second light L2 and the third light L3 emitted from the adjacent area. Therefore, the degree to which the third light L3 and the second light L2 are visually recognizable from the outside may be not obvious. Furthermore, when the tilt angle exceeds about 170 degrees, the effect of controlling the light emission direction may be less noticeable compared to the shape of the upper surface of the first resin layer 410.

[0108] Furthermore, the first diffusion layer 510 and the first wavelength conversion layer 610 can be disposed on the upper surface of the first resin layer 410. In this case, the first diffusion layer 510 and the first wavelength conversion layer 610 can have a shape corresponding to the upper surface of the first resin layer 410. That is, the cross-section of the first diffusion layer 510 and the first wavelength conversion layer 610 can have a "reverse V" shape, which has an inclination angle corresponding to the upper surface of the first resin layer 410.

[0109] Therefore, the first resin layer 410 can emit a point light source emitted from the light-emitting device 200 in the form of a line light source or a surface light source. Furthermore, since the upper surface of the first resin layer 410 has the protruding shape described above, it is compatible with the aforementioned first resin layer 410 (…). Figures 1 to 3Compared to the first resin layer 410, the first diffusion layer 510 can uniformly diffuse the light emitted through the upper surface of the first resin layer 410, and the first wavelength conversion layer 610 can convert the incident light into the first light L1 to emit the first light L1 at a wider angle.

[0110] Therefore, the lighting device 1000 according to this embodiment can emit light by mixing a portion of the first light L1 and a portion of the third light L3 emitted from a region adjacent to the first light L1. For this reason, this embodiment can achieve a wider variety of colors by using a light-emitting device 200 having a defined wavelength band.

[0111] Reference Figure 5 The lighting device 1000 may also include a first sub-resin layer 415 and a second diffusion layer 520.

[0112] The first sub-resin layer 415 can be disposed on the first resin layer 410. Specifically, the first sub-resin layer 415 can be disposed between the first diffusion layer 510 and the first wavelength conversion layer 610.

[0113] The first sub-resin layer 415 may be formed of a transparent material. The first sub-resin layer 415 may include resin materials such as silicone or epoxy resin. The first sub-resin layer 415 may include thermosetting resin materials, such as, optionally, PC, OPS, PMMA, PVC, etc. The first sub-resin layer 415 may be formed of glass, but is not limited thereto. For example, the main material of the first sub-resin layer 415 may be a resin material having a polyurethane acrylate oligomer as the main material. For example, a mixture of a polyurethane acrylate oligomer as the synthetic oligomer and a polymer type as a polyacrylate may be used. Of course, monomers mixed with low-boiling-point diluent reactive monomers such as IBOA (isobutylene acrylate), HPA (hydroxypropyl acrylate, 2-HEA (hydroxyethyl acrylate)), etc., may also be included, and it may be mixed with a photoinitiator (e.g., 1-hydroxycyclohexylphenyl ketone) or an antioxidant as an additive.

[0114] The first sub-resin layer 415 may have a smaller height than the first resin layer 410. For example, the first sub-resin layer 415 may be about 1 / 30 to about 3 / 4 of the height of the first resin layer 410. In detail, the first sub-resin layer 415 preferably satisfies the above range to ensure the light guiding distance between the first diffusion layer 510 and the second diffusion layer 520, which will be described later.

[0115] The first sub-resin layer 415 may have a set refractive index. For example, the refractive index of the first sub-resin layer 415 may be from about 1.4 to about 1.8. Since the first sub-resin layer 415 is configured as a resin layer for guiding light, it can be configured to have a thinner thickness than in the case of glass, and can be configured as a flexible plate. The first sub-resin layer 415 can guide light emitted from the first diffusion layer 510.

[0116] The second diffusion layer 520 can be disposed on the first resin layer 415. For example, the second diffusion layer 520 can be disposed between the first sub-resin layer 415 and the first wavelength conversion layer 610. The second diffusion layer 520 can diffuse the light emitted through the first sub-resin layer 415.

[0117] The second diffusion layer 520 may include beads (not shown). The beads can diffuse and reflect incident light, thereby increasing the amount of light. The beads may be composed of any material selected from silicon, silica, glass bulbs, polymethyl methacrylate (PMMA), polyurethane, Zn, Zr, Al2O3, and acrylic acid, and the particle diameter of the beads may be in the range of about 1 μm to about 20 μm, but is not limited thereto.

[0118] Therefore, the light emitted from the lighting device 1000 according to this embodiment can have a three-dimensional effect. Specifically, the first diffusion layer 510 and the second diffusion layer 520 can be spaced apart from each other by a predetermined interval via the first sub-resin layer 415. Therefore, when the light emitted from the lighting device 1000 is observed from the outside, the emitted light can be identified as multiple layers depending on the viewing angle. Thus, the lighting device 1000 according to this embodiment can emit light with a three-dimensional effect and improved aesthetics.

[0119] Figures 6 to 8 These are other cross-sectional views of the lighting device according to this embodiment. In use... Figures 6 to 8 In the description, descriptions of parts that are the same as or similar to the above-described lighting device are omitted, and the same reference numerals are assigned to the same and similar parts.

[0120] First, refer to Figure 6 The third resin layer 430 may have a set height. The height of the third resin layer 430 may increase from the first resin layer 410 to the second resin layer 420. Therefore, the spacing between the upper surface 431 and the lower surface of the third resin layer 430 increases from the first resin layer 410 to the second resin layer 420.

[0121] In other words, the third resin layer 430 may have a first height h1 in the region connected to the first resin layer 410, and a second height h2 in the region connected to the second resin layer 420. Here, the first height h1 may be the minimum height of the third resin layer 430, and the second height h2 may be the maximum height of the third resin layer 430. Furthermore, the second height h2 may correspond to the height of the second resin layer 420.

[0122] The upper surface 431 of the third resin layer 430 may be curved. For example, the upper surface 431 of the third resin layer 430 may have a concave shape in the direction from the upper surface 431 to the lower surface of the third resin layer 430.

[0123] Additionally, although not shown in the figures, the upper surface 431 of the third resin layer 430 may have a convex shape extending from the lower surface of the third resin layer 430 towards the upper surface. Furthermore, although not shown in the figures, the upper surface 431 of the third resin layer 430 may have both a flat surface and a curved surface. For example, the upper surface of the third resin layer 430 may be configured as a plane extending from the side surface 411 of the first resin layer 410 to a first point (not shown), and may be configured as a curved surface extending from the first point to the second resin layer 420. Here, the first point may be positioned according to the directional angle of the light-emitting device 200. For example, when the directional angle of the light-emitting device 200 is approximately 120 degrees to approximately 140 degrees, the first point may be located in a region satisfying approximately 40% to 60% of the interval between the first resin layer 410 and the second resin layer 420.

[0124] In other words, the lighting device 1000 according to this embodiment can control the brightness of the emitted third light L3 by controlling the shape of the upper surface 431 of the third resin layer 430.

[0125] Additionally, refer to Figure 7 Alternatively, a sub-light-emitting device 210 can be disposed on the substrate 100. The sub-light-emitting device 210 can be electrically connected to the substrate 100 and disposed in a region corresponding to the first resin layer 410. Specifically, one or more sub-light-emitting devices 210 can be disposed in a region that overlaps with the first resin layer 410 in the vertical direction. That is, the sub-light-emitting device 210 is disposed in the first resin layer 410, does not overlap with the second resin layer 420 and the third resin layer 430 in the vertical direction, and can be spaced apart from the light-emitting device 200 in the horizontal direction.

[0126] Sub-light-emitting device 210 is a device that includes a light-emitting diode (LED) and may include a package in which the light-emitting chip is encapsulated. The light-emitting chip can emit at least one type of visible light, such as blue light, red light, green light, yellow light, ultraviolet (UV) light, and infrared light, and light-emitting device 200 can emit at least one type of visible light, such as white light, blue light, red light, yellow light, green light, ultraviolet light, and infrared light. Specifically, sub-light-emitting device 210 can emit light in the same wavelength band as light-emitting device 200.

[0127] The sub-light-emitting device 210 can be of a different type than the light-emitting device 200. For example, the sub-light-emitting device 210 can have an orientation different from that of the light-emitting device 200. The sub-light-emitting device 210 can be a side-view type in which the light-emitting surface faces the side portion. Specifically, the sub-light-emitting device 210 can be configured such that the light-emitting surface faces the second resin layer 420 and the third resin layer 430. The optical axis of the sub-light-emitting device 210 can be parallel to the upper surface of the substrate 100.

[0128] The sub-light-emitting device 210 can be positioned closer to the third resin layer 430 than the light-emitting device 200. Therefore, the sub-light-emitting device 210 emits light towards the second resin layer 420 and the third resin layer 430, and can selectively improve the brightness of the light emitted through the second region R2 and the third region R3. For example, the lighting device 1000 according to this embodiment can emit a first light L1 with relatively high brightness using only the light-emitting device 200, and can emit a second light L2 and a third light L3 with relatively low brightness. Furthermore, the lighting device 1000 can selectively increase the brightness of the second light L2 and the third light L3 with relatively low brightness by using the light-emitting device 200 and the sub-light-emitting device 210. Therefore, the lighting device 1000 according to this embodiment can emit light of various colors using a light-emitting device with a single wavelength, and can control the brightness of the emitted light, thereby providing improved aesthetics.

[0129] Additionally, refer to Figure 8 The lighting device 1000 may also include a second reflective member 320. The second reflective member 320 may be disposed on the resin layer 400. For example, the second reflective member 320 may be disposed on the outer surface of the resin layer 400.

[0130] The second reflective member 320 can be provided in the form of a film made of metallic or non-metallic material. Alternatively, the second reflective member 320 can be provided by being deposited on the outer surface of the resin layer 400.

[0131] The second reflective member 320 may include a metallic or non-metallic material. The metallic material may include metals such as aluminum, silver, or gold. The non-metallic material may include a plastic or resin material. The plastic material may be selected from polyethylene, polypropylene, polystyrene, polyvinyl chloride, polychlorinated biphenyl, polyethylene terephthalate, polyvinyl alcohol, polycarbonate, polybutylene terephthalate, polynaphthalene ester, polyamide, polyacetal, polyphenylene ether, polyamide-imide, polyether-imide, polyetheretherketone, polyimide, polytetrafluoroethylene, liquid crystal polymers, fluorine, copolymers thereof, and mixtures thereof. The resin material may include a reflective material, such as a metal oxide in silicon or epoxy resin, such as TiO2, Al2O3, or SiO2. The second reflective member 320 may be implemented as a single layer or multiple layers, and the light reflection efficiency can be improved through such a layered structure. According to this embodiment, the second reflective member 320 reflects light incident on the resin layer 400, thereby increasing the amount of light and making the light emitted uniformly.

[0132] The second reflective member 320 may be disposed on at least one of the side surface 411 of the first resin layer 410, the side surface of the second resin layer 420, and the upper surface 431 of the third resin layer 430.

[0133] For example, the second reflective member 320 can be disposed on the side surface of the second resin layer 420. In this case, the second reflective member 320 can be disposed over the entire area of ​​the side surface of the second resin layer 420. Therefore, light incident on the second resin layer 420 can be prevented from being emitted to the outside through the side surface of the second resin layer 420, and light can be effectively guided toward the second wavelength conversion layer 620.

[0134] Furthermore, the second reflective member 320 can be disposed on the upper surface 431 of the third resin layer 430. In this case, the second reflective member 320 can be disposed over the entire area of ​​the upper surface 431 of the third resin layer 430. Therefore, light incident on the second resin layer 420 can be prevented from being emitted to the outside through the upper surface 431 of the third resin layer 430, and light can be effectively guided toward the second resin layer 420.

[0135] Furthermore, the second reflective member 320 may be disposed on the side surface 411 of the first resin layer 410. For example, the first resin layer 410 may include a side surface facing the third resin layer 430 and other side surfaces besides that one side surface. In this case, the second reflective member 320 may be disposed over the entire area of ​​the other side surfaces, or it may be disposed over a portion of one side surface.

[0136] That is, the second reflective member 320 may be partially disposed on a side surface of the first resin layer 410 facing the third resin layer 430. Specifically, the second reflective member 320 may include an open region O1 that exposes a portion of a side surface of the first resin layer 410. The open region O1 may be an open region O1 in which the third light L3 is emitted through the side surface 411 of the first resin layer 410 due to the absence of the second reflective member 320.

[0137] The open region O1 can be configured to be adjacent to the upper surface 431 of the third resin layer 430. Furthermore, the open region O1 can have a predetermined height (Z-axis direction) from the junction of the first resin layer 410 and the third resin layer 430. For example, the height of the open region O1 can be greater than or equal to a first height h1 and less than a second height h2. When the height of the open region O1 does not meet the above range, it may be difficult to control the brightness of the light emitted through the side surface of the first resin layer 410. For example, when the height of the open region O1 is less than the first height h1, the brightness value of the first light L1 may increase, but the light emitted through the open region O1 may also increase. The amount of the third light L3 may decrease significantly. Furthermore, when the height of the open region O1 is greater than the second height h2, the effect of controlling the brightness of the third light L3 by the second reflective member 320 may not be significant. Therefore, the second reflective member 320 disposed on the side surface of the first resin layer 410 can preferably include the open region O1 having the aforementioned height.

[0138] Preferably, the second reflective member 320 can be disposed on all side surfaces of the first resin layer 410, the side surfaces of the second resin layer 420, and the upper surface of the third resin layer 430, such as... Figure 8 As shown. Therefore, the light loss in the first region R1 and the second region R2 can be minimized, and the first light L1 and the second light L2 can be effectively emitted upwards, and the brightness of the third light L3 can be effectively controlled.

[0139] Figure 9 It shows the basis Figures 1 to 8 An example diagram of the luminous pattern of a lighting device. In detail, Figure 9 This is a view showing an example of the luminous pattern when the lighting device is viewed from above, and Figure 9 Section A-A' in the diagram can be based on Figures 1 to 8 Lighting devices.

[0140] Reference Figure 9The lighting device 1000 according to this embodiment can be arranged in various forms. Specifically, when viewed from above, the lighting device 1000 can have various shapes, such as numbers, characters, and emojis. For example, the lighting device 1000 can have the shape of the letter "L" and can emit light of various wavelength bands within the letter "L" shape.

[0141] In detail, the lighting device 1000 may include a first region R1, a second region R2, and a third region R3, defined by a first resin layer 410, a second resin layer 420, and a third resin layer 430. In this case, light of different wavelength bands can be emitted from the first region R1, the second region R2, and the third region R3. For example, a first light L1 can be emitted from the first region R1, a second light L2 can be emitted from the second region R2, and a third light L3 can be emitted from the third region R3.

[0142] In other words, the lighting device 1000 according to this embodiment can emit light of various wavelength bands using one or more light-emitting devices 200 that emit light of a single wavelength band. Furthermore, by controlling the shape of the resin layer 400, the brightness of the emitted light of various colors can be controlled individually. Therefore, the lighting device 1000 can have a simple structure, can be arranged in a slim form, and can have improved aesthetics.

[0143] Figure 10 This is another cross-sectional view of the lighting device according to this embodiment, and Figure 11 It shows the basis Figure 10 A view of an example of the luminous pattern of a lighting device. In detail, Figure 11 It shows the basis Figure 10 An example view of the luminous pattern of a lighting device when viewed from a top view, and Figure 11 The cross section B-B' can be based on Figure 10 Lighting devices.

[0144] In use Figure 10 and Figure 11 In the description, descriptions of parts that are the same as or similar to the above-described lighting device are omitted, and the same reference numerals are assigned to the same as or similar parts.

[0145] Reference Figure 10 The resin layer 400 may include multiple resin layers. Specifically, the resin layer 400 may include not only the first resin layer 410, the second resin layer 420, and the third resin layer 430, but also the fourth resin layer 440 and the fifth resin layer 450.

[0146] The fourth resin layer 440 may be spaced apart from the second resin layer 420. For example, the fourth resin layer 440 may be spaced apart from the second resin layer 420 in the horizontal direction. The fourth resin layer 440 may comprise the same material as the first resin layer 410, the second resin layer 420, and the third resin layer 430.

[0147] The fourth resin layer 440 may have a set height. The fourth resin layer 440 may have a constant height. The fourth resin layer 440 may have the same height as the first resin layer 410, and may be higher than the height of the second resin layer 420. The fourth resin layer 440 may have a shape, height, and width corresponding to the shape, height, and width of the first resin layer 410.

[0148] The fifth resin layer 450 may be disposed between the second resin layer 420 and the fourth resin layer 440. The fifth resin layer 450 may comprise the same material as the first resin layer 410, second resin layer 420, third resin layer 430, and fourth resin layer 440. The fifth resin layer 450 may physically connect the second resin layer 420 and the fourth resin layer 440. That is, the first resin layer 410, second resin layer 420, third resin layer 430, fourth resin layer 440, and fifth resin layer 450 may be formed integrally.

[0149] The fifth resin layer 450 may have a predetermined height. Specifically, the height of the fifth resin layer 450 may increase from the fourth resin layer 440 to the second resin layer 420. Therefore, the spacing between the upper surface 451 and the lower surface of the fifth resin layer 450 increases from the fourth resin layer 440 to the second resin layer 420. The upper surface 451 of the fifth resin layer 450 may be flat. The upper surface 451 of the third resin layer 430 may be inclined relative to the lower surface of the fifth resin layer 450. For example, the inclination angle formed by the upper surface 451 and the lower surface of the fifth resin layer 450 may be from approximately 20 degrees to approximately 70 degrees.

[0150] Additionally, although not shown in the figures, the upper surface 451 of the fifth resin layer 450 may have a curved surface. For example, the upper surface 451 of the fifth resin layer 450 may have a concave shape extending from the upper surface 451 towards the lower surface, and conversely, it may have a convex shape extending from the lower surface of the fifth resin layer 450 towards the upper surface. Furthermore, the upper surface 451 of the fifth resin layer 450 may have a shape that combines flat and curved surfaces. The fifth resin layer 450 may have a shape, height, and width corresponding to those of the third resin layer 430.

[0151] The lighting device 1000 may include a plurality of light-emitting devices 200. For example, the light-emitting device 200 may include a first light-emitting device 200A disposed in a region that overlaps with the first resin layer 410 in the vertical direction. The first light-emitting device 200A may be disposed in and sealed by the first resin layer 410. Furthermore, the light-emitting device 200 may include a second light-emitting device 200B disposed in a region that overlaps with the fourth resin layer 440 in the vertical direction. The second light-emitting device 200B may be disposed in and sealed by the fourth resin layer 440.

[0152] Each of the first light-emitting device 200A and the second light-emitting device 200B can be a top-view type with the light-emitting surface facing upward, and can emit the highest intensity light through the upper surface of each of the first resin layer 410 and the fourth resin layer 440.

[0153] One or more of each of the first light-emitting device 200A and the second light-emitting device 200B can be provided. In addition, the first light-emitting device 200A and the second light-emitting device 200B can emit light of the same wavelength band.

[0154] The lighting device 1000 may include a third wavelength conversion layer 630. The third wavelength conversion layer 630 may be disposed on a fourth resin layer 440.

[0155] The third wavelength conversion layer 630 may include a wavelength conversion material. For example, the third wavelength conversion layer 630 may include at least one wavelength conversion material selected from phosphors and quantum dots. For example, the third wavelength conversion layer 630 may include a phosphor and may emit white, blue, yellow, green, and red light. The phosphor may include at least one or two selected from green phosphors, red phosphors, amber phosphors, yellow phosphors, white phosphors, and blue phosphors. The phosphor may include at least one selected from YAG-based phosphors, TAG-based phosphors, silicate-based phosphors, sulfide-based phosphors, and nitride-based phosphors. The third wavelength conversion layer 630 may include the same material as the first wavelength conversion layer 610, and may include materials different from those in the second wavelength conversion layer 620. The third wavelength conversion layer 630 may include a material that converts light in the same wavelength band as the first wavelength conversion layer 610.

[0156] The third wavelength conversion layer 630 can absorb light emitted from the second light-emitting device 200B and convert it into first light L1 of the first wavelength band. Specifically, the third wavelength conversion layer 630 can absorb light incident through the fourth resin layer 440 and convert it into first light L1. Furthermore, the third wavelength conversion layer 630 absorbs light reflected by the first reflective member 300 from the light emitted from the first light-emitting device 200A and the second light-emitting device 200B, and converts it into first light L1.

[0157] The lighting device 1000 may also include a third diffusion layer 530. The third diffusion layer 530 may be disposed between the fourth resin layer 440 and the third wavelength conversion layer 630. The third diffusion layer 530 can uniformly diffuse the light emitted through the fourth resin layer 440. Furthermore, since certain colors may not be mixed when the light intensity is high, the third diffusion layer 530 can diffuse and mix the light.

[0158] The third diffusion layer 530 may include beads (not shown). The beads can diffuse and reflect incident light, thereby increasing the amount of light. The beads may be composed of any one selected from silicon, silica, glass bulb, polymethyl methacrylate (PMMA), polyurethane, Zn, Zr, Al2O3, and acrylic acid, and the particle diameter of the beads may be in the range of about 1 μm to about 20 μm, but is not limited thereto.

[0159] The lighting device 1000 may include multiple regions. For example, the lighting device 1000 may include a first region R1 corresponding to the first resin layer 410, a second region R2 corresponding to the second resin layer 420, and a third region R3 corresponding to the third resin layer 430. In addition, the lighting device 1000 may include a fourth region R4 corresponding to the fourth resin layer 440 and a fifth region R5 corresponding to the fifth resin layer 450.

[0160] The lighting device 1000 can emit light of various wavelength bands depending on the region. For example, a first light L1 passing through the first wavelength conversion layer 610 can be emitted from the first region R1, while a second light L2 passing through the second wavelength conversion layer 620 can be emitted from the second region R2.

[0161] Furthermore, a third light L3, unlike the first light L1 and the second light L2, can be emitted from the third region R3. Specifically, the third light L3 emitted through the side surface 411 of the first resin layer 410 can be emitted from the third region R3.

[0162] Furthermore, the first light L1 emitted through the third wavelength conversion layer 630 can be emitted from the fourth region R4, and the third light L3 can be emitted from the fifth region R5. Specifically, the third light L3 emitted through the side surface 441 of the fourth resin layer 440 can be emitted from the fifth region R5.

[0163] Here, the first light L1 and the second light L2 can be light with a wavelength band different from the light emitted from the light-emitting device 200, and the third light L3 can be light with the same wavelength band as the light emitted from the first light-emitting device 200A and the second light-emitting device 200B.

[0164] Furthermore, the brightness of the light emitted from the second region R2, the third region R3, and the fifth region R5 can be lower than the brightness of the first region R1 and the fourth region R4. Additionally, the second light L2 and the third light L3 emitted from the second region R2, the third region R3, and the fifth region R5 can emit light whose brightness decreases in a gradient form as the distance from the first light-emitting device 200A and the second light-emitting device 200B increases.

[0165] Additionally, refer to Figure 11 The lighting device 1000 can be arranged in various forms to provide various types of light. Specifically, when viewed from a top view, the lighting device 1000 can have various shapes, such as numbers, characters, emojis, etc. For example, the lighting device 1000 can have shapes like... Figure 11 It has a rectangular shape as shown, and can emit light of various wavelength bands in either a rectangular or circular shape.

[0166] In detail, the lighting device 1000 may include first to fifth regions R1, R2, R3, R4, and R5, separated by first to fifth resin layers 410, 420, 430, 440, and 450. In this case, the first to fifth regions R1, R2, R3, R4, and R5 may emit light of different or the same wavelength bands. For example, a first light L1 may be emitted from the first region R1, a second light L2 may be emitted from the second region R2, and a third light L3 may be emitted from the third region R3. Alternatively, the first light L1 may be emitted from the fourth region R4, and the third light L3 may be emitted from the fifth region R5.

[0167] In other words, the lighting device 1000 according to this embodiment can emit light of various wavelength bands using a light-emitting device 200 that emits light of a set wavelength band, such as a single wavelength band. Furthermore, the lighting device 1000 can adjust the brightness of the first to third lights L1, L2, and L3 emitted from the first to fifth regions R1, R2, R3, R4, and R5 respectively by adjusting the width and / or height of the first to fifth resin layers 410, 420, 430, 440, and 450. Therefore, the lighting device 1000 according to this embodiment can have a simple structure, can be installed in a slim form, and can have improved aesthetics.

[0168] Figure 12 This is a diagram illustrating an example of a lamp, including a lighting device according to an embodiment of the present invention, being applied to a vehicle.

[0169] Reference Figure 12 The lighting device 1000 according to this embodiment can be applied to a vehicle 2000. The lamp includes the lighting device 1000, and one or more lamps can be disposed on at least one of the front 2100, rear 2200 and side 2300 of the vehicle 2000.

[0170] For example, the lamp can be positioned in an area corresponding to a badge or sign located in at least one of the front 2100, rear 2200, and side 2300 of the vehicle 2000. That is, the lamp can be used as a badge or sign light for the vehicle 2000. Specifically, a first area R1 with relatively high brightness in the lighting device 1000 can be formed in a shape corresponding to the badge or sign of the vehicle 2000. Therefore, when the lamp is turned on, the first light L1 can be visually identified from the outside in the shape of the vehicle's badge or sign.

[0171] Furthermore, light of various wavelength bands can be emitted around the emblem or logo shape. For example, near the emblem or logo shape, the brightness of the second light L2 and the third light L3 is lower than that of the first light L1, and they can emit wavelength bands different from the wavelength band of the first light L1. In this case, the second light L2 and the third light L3 can have shapes corresponding to the emblem or logo shape, and their brightness can decrease in a gradient form as the distance from the first region R1 where the first light L1 is emitted increases.

[0172] In this case, when the lighting device 1000 is as follows Figure 4 When applied as shown, the first light L1 can be emitted at a wider angle. Therefore, when the light is turned on, the emblem or logo shape can be visually recognized from the outside at a wider angle.

[0173] In addition, when the lighting device 1000 such Figure 5 When applied as shown, the first light L1 can have a three-dimensional effect due to the multiple diffusion layers 510 and 520. Therefore, when the light is turned on, the emblem or logo shape can be visually identified as having multiple layers. Thus, when viewed from the outside, the emblem or logo can be visually recognized as three-dimensional.

[0174] In other words, the lamp according to this embodiment can emit light of various wavelength bands using a light-emitting device with a single wavelength band. Furthermore, the lamp can be configured with a simple and slim structure and can emit light to correspond to the shapes of various emblems and logos. Therefore, the lamp according to this embodiment can improve aesthetics and design freedom.

[0175] The features, structures, effects, etc., described in the above embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc., described in each embodiment can be combined or modified by those skilled in the art for other embodiments. Therefore, content related to such combinations and modifications should be interpreted as being included within the scope of the present invention.

[0176] Furthermore, although this embodiment has been described above, it is merely an example and does not limit the invention. Those skilled in the art will understand that various modifications and applications not illustrated are possible without departing from the essential characteristics of this embodiment. For example, each component specifically shown in the embodiment can be implemented by modification. Differences relating to such modifications and applications should be understood to be included within the scope of the invention as defined in the appended claims.

Claims

1. A lighting device, comprising: substrate; Light-emitting device disposed on the substrate; A first reflective member disposed on the substrate; A resin layer disposed on the first reflective member; as well as A wavelength conversion layer disposed on the resin layer; The resin layer includes: First resin layer; A second resin layer spaced apart from the first resin layer; and A third resin layer is disposed between the first resin layer and the second resin layer, wherein the wavelength conversion layer includes: A first wavelength conversion layer disposed on the first resin layer; and A second wavelength conversion layer disposed on the second resin layer. The height of the second resin layer is lower than the height of the first resin layer. The light-emitting device is disposed in the following region, which does not overlap with the second resin layer and the third resin layer in the vertical direction, but overlaps with the first resin layer in the vertical direction. The light-emitting device is embedded in the lower part of the resin layer. The first wavelength conversion layer absorbs light emitted from the light-emitting device and converts the light into first light with a first wavelength band. The second wavelength conversion layer absorbs light incident through the second and third resin layers and converts the light into a second type of light. The second light has a different color than the first light, and A portion of the light emitted from the light-emitting device is emitted as third light through the side surface of the first resin layer facing the upper surface of the third resin layer.

2. The lighting device according to claim 1, in, The height of the upper surface of the second resin layer is lower than the height of the upper surface of the first resin layer, and The upper surface of the third resin layer faces one side surface of the first resin layer.

3. The lighting device according to claim 2, in, The third resin layer includes a region where the height of the third resin layer increases from the first resin layer to the second resin layer, and The upper surface of the third resin layer has the lowest height in the region connected to the first resin layer and the highest height in the region connected to the second resin layer.

4. The lighting device according to claim 3, in, The upper surface of the third resin layer includes at least one of a flat surface and a curved surface, and A portion of the third light is reflected by the upper surface of the third resin layer.

5. The lighting device according to any one of claims 1 to 4, comprising: A first diffusion layer is disposed between the first resin layer and the first wavelength conversion layer. The upper surface of the light-emitting device faces the upper surface of the first resin layer and emits light with the highest intensity.

6. The lighting device according to any one of claims 1 to 4, in, The second wavelength conversion layer includes at least one of phosphor and quantum dots, for converting light in a wavelength band different from that of the first wavelength conversion layer, and The height of the upper surface of the second wavelength conversion layer is lower than the height of the upper surface of the first wavelength conversion layer.

7. The lighting device according to any one of claims 1 to 4, comprising: The second reflective member is disposed on the outer surface of the resin layer. The second reflective member is disposed on at least one of the side surface of the first resin layer, the side surface of the second resin layer, and the upper surface of the third resin layer.

8. The lighting device according to claim 7, in, The second reflective member is disposed on a portion of the upper surface of the side surface of the first resin layer facing the third resin layer, and The second reflective member facing the upper surface of the third resin layer includes an open area that exposes a portion of the side surface of the first resin layer.

9. The lighting device according to any one of claims 1 to 4, comprising: Sub-light-emitting devices spaced apart from the light-emitting device The sub-light-emitting device is disposed in the region that does not overlap with the second resin layer and the third resin layer in the vertical direction, but overlaps with the first resin layer in the vertical direction.

10. The lighting device according to claim 9, in, The light-emitting surface of the sub-light-emitting device is configured to face the second resin layer and the third resin layer, and its orientation differs from that of the light-emitting surface of the main light-emitting device. The light-emitting surface of the light-emitting device is a top-view type that emits light upwards.

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