Lighting device

Abstract

To provide a surface-emitting lighting device for improving aesthetic sense.SOLUTION: A lighting device 1000 includes: a plurality of light sources 200 disposed on a substrate 100; a resin layer 400 disposed on the substrate and the plurality of light sources; a phosphor layer 500 disposed on the resin layer; and an ink layer 600 disposed on the phosphor layer. The ink layer has a height greater than that of a first ink layer 610 with the top surfaces of the first ink layer and the phosphor layer as a reference and can three-dimensionally provide a surface image.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] An embodiment of the invention relates to a surface emitting lighting device for enhancing aesthetics. [Background technology]

[0002] Generally, light-emitting elements, such as light-emitting diodes (LEDs), are used in existing light sources such as fluorescent lamps and incandescent lamps. Compared to conventional lasers, it has advantages such as low power consumption, semi-permanent lifespan, fast response speed, safety, and environmental friendliness. Such light emitting diodes are used in a variety of display devices and various lighting applications such as indoor and outdoor lighting. Recently, lamps that use light-emitting elements have been proposed as vehicle light sources. Compared to incandescent lamps, light-emitting elements have the advantage of consuming less power. The light-emitting element is small in size, which allows for greater freedom in lamp design, and It is also economical due to its permanent lifespan. This type of vehicle lighting device uses a surface light source. This allows the vehicle lamp to have a three-dimensional effect and a unique aesthetic feel. Conventional vehicle lighting devices have an exterior appearance made of rubber or plastic when not lit. The texture and feel of the car is strong, which reduces the aesthetic appeal of the exterior. Dual-use lighting devices are simply distinguished by the degree of color shading in the off and on states. This is the extent to which the driver is aware of the situation, and this can lead to accidents for drivers who are unable to recognize this. Summary of the Invention [Problem to be solved by the invention]

[0003] An embodiment of the invention provides a lighting device for a vehicle to improve the aesthetic appearance of the product. In an embodiment of the invention, a predetermined shape is formed on the surface of at least one of the phosphor layer and the ink layer. It is possible to provide a lighting device having a pattern in which shapes are repeatedly arranged. An example may provide a lighting device for a vehicle to enhance safety features. For example, a lighting device capable of realizing various lighting images can be provided. [Means for solving the problem]

[0004] The lighting device according to an embodiment of the invention includes a substrate, a plurality of light sources disposed on the substrate, and a front a resin layer disposed on the substrate and the plurality of light sources; and a phosphor disposed on the resin layer. a first ink layer disposed on the phosphor layer; and an ink layer disposed on the phosphor layer, the ink layer comprising a first ink and a height greater than the first ink layer based on the top surface of the phosphor layer. can.

[0005] The lighting device according to an embodiment of the invention includes a substrate, a plurality of light sources disposed on the substrate, and a front a resin layer disposed on the substrate and the plurality of light sources; and a phosphor layer disposed on the resin layer. an ink layer disposed on the phosphor layer, the ink layer having a plurality of protrusions; The recessed portions are disposed between adjacent protruding portions, and the upper surfaces of the protruding portions are The height of the bottom of the casing may be greater than the height of the bottom of the casing.

[0006] The lighting device according to an embodiment of the invention includes a substrate, a plurality of light sources disposed on the substrate, and a front a resin layer disposed on the substrate and the plurality of light sources; and a phosphor layer disposed on the resin layer. a plurality of phosphor layers disposed on at least one of the upper surface and the side surfaces of the phosphor layer; and an ink layer, the ink layers including a first ink layer on the phosphor layer and the a second ink layer having a plurality of convex portions on the first ink layer, wherein the plurality of ink layers are The second ink layer includes a plurality of concave recesses between the plurality of convex portions, and the height of the upper surface of the second ink layer is It may be disposed higher than the height of the upper surface of the first ink layer.

[0007] According to an embodiment of the invention, the height of the first ink layer is 1 / 5 of the height of the second ink layer. The upper surface of the first ink layer may be parallel to the upper surface of the second ink layer. The first ink layer may include a plurality of ink layers having different heights. The upper surface of the first ink layer is inclined with respect to the upper surface of the second ink layer. The upper surface of the first ink layer may include a curved surface. The height of the ink layer can correspond to the thickness of the phosphor layer. The upper surface of the 1-1 ink layer and the phosphor layer is used as a reference, and the upper surface of the 1-1 ink layer is smaller than the 1-1 ink layer. The first ink layer may include a first-second ink layer having a height. The widths of the second ink layer and the second ink layer may be different from each other. The first ink layer embodies a first pattern of light by the emitted light, and the second ink layer The layer embodies light of a second pattern different in shape from the first pattern, and the brightness of the light is 10 In candela or less, the brightness of the area of ​​the first pattern is When the brightness of the light is 60 candela or more, the area of ​​the first pattern is brighter than the brightness of the light. The brightness of the second pattern may correspond to the brightness of the second pattern area. [Effects of the Invention]

[0008] An embodiment of the invention provides a method for forming the exposed upper surface of the ink layer at different heights, thereby preventing the formation of unexposed areas. When lit, the product's appearance can be visualized. The difference in height of the exposed top surface of the layer provides a three-dimensional image when unlit and a light when lit. The intensity of the stereoscopic effect can be varied depending on the brightness level of the In the stop mode, a 3D image can be realized. By making the message invisible, it is possible to guide the driver to drive safely. In the embodiment, a plurality of ink layers are formed so that the upper surfaces have different heights, thereby forming three The above colors can be used to realize an image. By forming an inclined surface, a gradation effect can be realized in the image. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view showing a lighting device according to an embodiment of the invention; [Figure 2] 2 is a cross-sectional view taken along the line AA in FIG. 1. [Figure 3] FIG. 2 is an enlarged view showing a part of an ink layer according to an embodiment of the present invention. [Figure 4] 1A and 1B are a plan view and a side cross-sectional view of a pattern according to an embodiment of the invention; [Figure 5] 1A and 1B are a plan view and a side cross-sectional view of a pattern according to an embodiment of the invention; [Figure 6] FIG. 10 is a cross-sectional view showing a modified example of the ink layer according to the embodiment of the invention. [Figure 7] FIG. 10 is a cross-sectional view showing a modified example of the ink layer according to the embodiment of the invention. [Figure 8] FIG. 10 is a cross-sectional view showing a modified example of the ink layer according to the embodiment of the invention. [Figure 9]1 is a schematic perspective view showing a vehicle rear lamp equipped with a lighting device according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The technical concept of the invention is not limited to the embodiments described, but may be embodied in various forms. Within the scope of the technical concept of the present invention, the components of the embodiments may be selectively connected. In addition, the terms (technical and scientific terms) are not intended to be used in the art to which the present invention pertains unless expressly specified otherwise. The meaning of the term is interpreted as being generally understood by a person of ordinary skill in the art and is defined in a dictionary. The meaning of commonly used terms should be interpreted in light of the context of the technology involved. In addition, the terms used in the embodiments of the present invention are intended to explain the embodiments. The singular forms "a," "an," and "the" are used herein to denote the same or similar parts, and are not intended to limit the scope of the present invention. Unless otherwise specified, plural forms can be included, and "at least one of A, B, and C ( When "one or more" is stated, it means all possible combinations of A, B, and C. In addition, in the description of the components of the embodiment of the present invention, Terms such as first, second, A, B, (a), (b) etc. may be used. The term is used to distinguish the component from other components. There is no limitation on the nature or order of the components. When described as being "coupled" or "connected," an element refers to another element directly connected to it. When the components are directly connected or connected, or when other components are "connected" or "connected" between the components This includes all cases where the components are "coupled" or "connected" to each other. When described as being or being positioned on, "above or below" means that the two components are in direct contact. Not only when one or more other components are formed or arranged between the two components, but also when one or more other components are formed or arranged between the two components. Also, when it is expressed as "above or below," it means that one component is used as the reference. Therefore, it can mean not only the upward direction but also the downward direction.

[0011] FIG. 1 is a perspective view showing an illumination device according to an embodiment, and FIG. 2 is a cross-sectional view taken along line A-A of FIG. FIG. 3 is an enlarged view showing a part of the ink layer according to the embodiment, and FIGS. 4 and 5 1 is a diagram showing how a pattern according to an embodiment is implemented.

[0012] Referring to FIG. 1, a lighting device 1000 according to an embodiment of the invention may have a three-dimensional shape, e.g., at least The lighting device 1000 has a structure capable of emitting light from multiple sides. For example, the lighting device 1000 may be formed so that light is emitted from the four side surfaces and the top surface. The lighting device 1000 can also emit light through the bottom. The substrate 100 may be made of a transparent material. Although both sides are shown as having a rectangular shape, the shape is not limited to this. The top surface of the device 100 can be formed in a variety of shapes, such as a polygonal or circular shape. The surface of the lighting device 1000 may be flat or have one or more curved surfaces. The lighting device 1000 may include a plurality of patterns P on the top or on the top surface. The pattern P may include a first pattern P1 and a second pattern P2. The patterns P are different from each other and embody the image of the product appearance. Such a pattern P can be formed on the side of the lighting device 1000, for example, on one side, The first pattern P1 and the second pattern P2 may be formed on one side or all sides. The second pattern P2 may be arranged in a manner such that the first pattern P1 is arranged alternately. The first pattern may be arranged alternately or repeatedly between the first pattern and the second pattern. The patterns P1 may be alternately arranged between the areas where the second patterns P2 are arranged, and may be repeatedly The second pattern P2 may be a polygonal shape, a circular shape, an elliptical shape, a curved surface, or a corner shape. At least one of the following symbol shapes: a shape with a surface, an irregular shape, a line shape, and a cross shape The outer frame of the pattern P may include the first pattern P1 and / or the second pattern P2. The outer frame may be formed in a continuous pattern. The first pattern P may be formed as a continuous line pattern or a discontinuous line pattern. 1 and the second pattern P2.

[0013] Referring to FIG. 2, the lighting device 1000 according to the embodiment includes a substrate 100 and a substrate 100. a plurality of light sources 200 arranged on the light source layer 200; and a resin layer 400 arranged on the light sources 200. , a phosphor layer 500 disposed on the resin layer 400, and a The substrate 100 may include an ink layer 600 having recesses and protrusions. The substrate 100 may be rigid or flexible. The substrate 100 may be made of a transparent or opaque material. On one surface of the substrate 100, electrode pads of a conductive pattern may be formed.

[0014] The light sources 200 are arranged in a row (longitudinal direction) of the substrate 100, and N light sources 200 are arranged in a row (longitudinal direction) of the substrate 100. Alternatively, M light sources 200 may be arranged in the short axis (row) direction of the substrate 100. The N light sources 200 are formed to have the same or different separation distances from each other. Similarly, the M light sources 200 arranged in the minor axis direction of the substrate 100 may be The light sources 200 may be formed to have the same or different separation distances. The distance between the N and the N-th light sources can be appropriately designed to effectively realize a surface light source. The number of N and M may be two or more, and may be the same or different.

[0015] The light source 200 can include a light emitting element. The light source 200 can emit blue, green, red, and white light. The light source 200 can emit light in the range of 420 nm to 420 nm, for example, 420 nm to 420 nm ... The light source 200 can emit blue light in the range of 100 to 470 nm. The light source 200 may be provided, for example, from a II-VI or III-V compound semiconductor. For example, the light source 200 may be made of aluminum (Al), gallium (G), or a), indium (In), phosphorus (P), arsenic (As), nitrogen (N) The light source 200 may be provided containing at least two or more elements. The first and second conductive type semiconductor layers may include an active layer and a second conductive type semiconductor layer. , and can be realized with at least one of group 3-5 or group 2-6 compound semiconductors. The first and second conductive type semiconductor layers can be, for example, In x Al y Ga 1‐x‐y N(0 ≦x≦1, 0≦y≦1, 0≦x+y≦1). For example, the first and second conductive type semiconductor layers may be made of GaN, AlN, AlGaN, or I nGaN, InN, InAlGaN, AlInN, AlGaAs, GaP, GaAs, G It may contain at least one selected from the group including aAsP, AlGaInP, etc. The first conductive type semiconductor layer is doped with an n-type dopant such as Si, Ge, Sn, Se, or Te. The second conductive type semiconductor layer may be a doped n-type semiconductor layer. It may also be a p-type semiconductor layer doped with a p-type dopant such as Al, Sr, or Ba. The active layer may be implemented with a compound semiconductor. The active layer may be made of at least one of group 2-6 compound semiconductors. When embodied in a multiple well structure, the active layer comprises a plurality of well layers and a plurality of well layers alternately arranged. A barrier layer may be included, x Al y Ga 1‐x‐y N(0≦x≦1, 0≦y≦1, 0 ≦x+y≦1). For example, the active layer may be , InGaN / GaN, GaN / AlGaN, AlGaN / AlGaN, InGaN / A lGaN, InGaN / InGaN, AlGaAs / GaAs, InGaAs / GaAs , InGaP / GaP, AlInGaP / InGaP, InP / GaAs It may include at least one selected from the above.

[0016] A reflective layer 300 is further formed on the substrate 100. The reflective layer 300 is The reflective layer 300 serves to guide the light generated from the reflective layer 300 upward. The reflective layer 300 may include a resin material. The reflective layer 300 may include a silicone material. The reflective layer 300 may include a reflective material, such as TiO2. This may also be done.

[0017] The resin layer 400 is disposed on the substrate 100 and the light source 200. The resin layer 400 is made of a plurality of The resin layer 400 is formed to cover the upper and side surfaces of the light source 200. The resin layer 400 is made of a transparent resin material. For example, UV (Ultra violet) resin, silicone or epoxy resin materials. The resin layer 400 may have a thickness of 1 mm to 4 mm. For example, the main material is a resin (oligomer) whose main ingredient is urethane acrylate oligomer. For example, synthetic oligomers such as urethane acrylates can be used. The main material may be a low-boiling point dilution type reactive monomer. IBOA (isobornyl acrylate), HBA (hydroxybutyric acid) Hydroxybutyl Acrylate), HEMA (Hydroxymethyl Acrylate) It may further contain a mixed monomer such as hydroxymethyl acrylate. As an additive, a photoinitiator (e.g., 1-hydroxycyclohexylphenyl ketone) may be used. ,Diphenyl(1‐hydroxycyclohexyl phenyl‐ketone,Diphenyl)), Diphenyl(2, 4,6-trimethylbenzoylphosphine oxide (Diphwnyl(2,4,6-trimethylbenzoyl The UV resin may be mixed with an antioxidant such as phosphine oxide. It is composed of 10-21% oligomer, 30-63% monomer, and 1.5-6% additive. In this case, the monomer may be IBOA (isobornyl acrylate). e)10~21%, HBA (Hydroxybutyl Acrylate)10~21%, HEMA (Hydroxy Meta The additive may be a mixture of 10 to 21% of a photoinitiator. It can be added at 1-5% to initiate photoreactivity, and antioxidant 0% The above composition can be added in an amount of 0.5 to 1% to improve yellowing. The resin layer 300 is formed by using a material such as a UV resin instead of a light guide plate. By using the above composition, it is possible to adjust the refractive index and thickness, and also to improve the adhesive properties and reliability. The resin layer 400 can be formed to satisfy both reliability and mass production speed. The dispersion medium may further include beads or a dispersing agent. The size of the diffusing agent may be in the range of 4 μm to 6 μm. The shape and size of the resin layer 400 in the lighting device are not limited to these. The resin layer 400 may be formed of one layer or may include two or more layers. The resin layer includes a first resin layer that does not contain impurities and a second resin layer that contains a diffusing agent on the first resin layer. Alternatively, the second resin layer can be formed under the first resin layer. .

[0018] The phosphor layer 500 is formed on the resin layer 400. The phosphor layer 500 is disposed so as to cover the upper surface and / or side surface of the resin layer 40. The phosphor layer 500 may be in contact with the surface of the substrate 500. The phosphor layer 500 may include a transparent material. The phosphor layer 500 may include a transparent insulating material. Silicon materials may be used, and silicon materials may have different chemical bonds. Silicon is an inorganic polymer made up of silicon, an inorganic substance, and carbon, an organic substance. Thermal stability, chemical stability, abrasion resistance, glossiness, etc. of materials and reactivity and solubility, which are characteristics of organic materials It has physical properties such as toughness, elasticity, and workability. Silicon is made of general silicon with a high fluorine ratio. Increasing the fluorine ratio of fluorine silicon improves moisture resistance. The phosphor layer 500 has an effect of improving the light emitted from the light source 200. For example, the phosphor may include a wavelength conversion means for providing wavelength-converted light. The layer 500 may include at least one selected from the group including phosphors, quantum dots, etc. The phosphor or quantum dot can emit blue, green, or red light. The phosphor is uniformly distributed inside the phosphor layer 500. The phosphor is a fluoride. The phosphor may include a phosphor of a compound of the MGF system, a KSF system, or a KT system. The phosphors may include at least one of a F-based phosphor and a phosphor having different peaks. The light emitted from the light source 200 can be divided into different yellow and red wavelengths. The phosphor may emit light at different red peak wavelengths. In this case, the red phosphor has a wavelength range of 610 nm to 650 nm. The wavelength can have a width of less than 10 nm. The fluoride-based phosphor may include a KSF-based red K2S iF6:Mn 4+ , K2TiF6:Mn 4+ , NaYF4:Mn 4+ , NaGdF4:M n 4+ , K3SiF7:Mn 4+ The KSF may include at least one of the following: K-based phosphors, for example a Si 1‐c F b :Mn 4+ c, wherein a The above b satisfies 1=a≦2.5, the above b satisfies 5=b≦6.5, and the above c satisfies 0.001=c≦0.1. Furthermore, the fluoride-based red phosphor can improve reliability under high temperature / high humidity conditions. To achieve this, they are coated with Mn-free fluorides or the phosphor surface or The Mn-free fluoride coating may further include an organic coating on the surface. Unlike other phosphors, the fluoride-based red phosphors mentioned above have a size of 10 nm or less. Since the width of the bottom can be realized, it can be used in a high-resolution device. The composition must basically conform to stoichiometry, and each element must conform to the periodic law. Substitutions for other elements within each group on the table are possible. For example, Sr is a B element in the alkaline earth (II) group. Y can be substituted with lanthanides such as Tb, Lu, Sc, and Gd. In addition, the activator Eu etc. can be replaced with Ce, Tb, Pr, E etc. depending on the desired energy level. It can be substituted with r, Yb, etc., and the activator alone or inactive agent etc. can be added to modify the properties. The quantum dots may include a II-IV compound or a III-V compound semiconductor. The quantum dots can emit red light. e, ZnTe, CdS, CdSe, CdTe, GaN, GaP, GaAs, GaSb, I nP, InAs, In, Sb, AlS, AlP, AlAs, PbS, PbSe, Ge, S The alloy may be composed of CuInS2, CuInSe2, etc., and combinations thereof.

[0019] The ink layer 600 is disposed on the phosphor layer 500. The ink layer 600 is a red ink. The ink layer 600 can contain ink, i.e., ink powder. When the light source 200 is turned on or off, the outer surface of the lighting device 1000 appears red. When the light is on, it appears red. The ink layer 600 is made of a resin material and has a red color inside. The ink is contained in a certain weight percentage. For example, red ink is contained in the ink layer 600 in a percentage of 2 wt % to 10 wt %. The ink layer 600 may contain, for example, red ink. However, other colors, such as yellow or blue, may be used. Ink powders having such colors can be used to display the surface color when lit or unlit. Provides ink color or reduces surface color difference when lit or unlit .

[0020] The ink layer 600 has a plurality of ink droplets with different heights on the upper surface thereof to realize the pattern P. The ink layer 600 may include multiple ink layers 600. The ink layer 600 may include recesses and protrusions. The ink layer 600 can include a first ink layer 610 and a second ink layer 620. The first ink layer 610 is disposed on top of the phosphor layer 500 or is disposed between the phosphor layer 500 and the first ink layer 610. The second ink layer 620 can contact the surface of the first ink layer 610. The second ink layer 620 is disposed on the first ink layer 610 in a predetermined shape. The upper surface area of ​​the second ink layer 620 may include a pattern having a shape. The area of ​​the bottom surface of the first ink layer 610 may be smaller than the area of ​​the bottom surface of the first ink layer 610. The first ink layer 610 has a recess. The recessed portion may be a groove or a recess formed between the protruding portions. The second ink layer 620 may be an area where a convex portion is formed. The convex portion may be The recesses may be connected to each other or may be arranged outside the recesses. The recessed portions may be disposed inside the plurality of protruding portions. The convex portion is a structure that protrudes toward the upper surface of the ink layer 600, and the concave portion is a structure that protrudes toward the upper surface of the ink layer 600. The first insulating layer 600 may have a recessed structure from the upper surface to the lower surface. The ink layer 610 may be a layer for realizing the first pattern P1. The first pattern P1 may include a plurality of recesses. The second ink layer 620 may include a number of recesses. The second pattern P2 may be a layer for forming a plurality of projections. The second pattern P2 may include a protrusion that is connected to the first pattern P1. The first ink layer 610 and the second ink layer 611 may be disposed between the protrusions. The layer 620 may be made of the same material or a different material. The second insulating layer 400 may be disposed on the upper surface of the resin layer 400, but may not be formed on the side surfaces. The pattern P2 or second ink layer 620 is disposed on the top surface of the phosphor layer 500 and The second pattern P2 or the second ink layer 620 may not be formed on the phosphor layer. The ink layer 600 may not be formed on the side of the ink layer 500 or the resin layer 400. Alternatively, the phosphor layer 500 may be formed on a flat surface without the protrusions. The three-dimensional image on the side of the fat layer 400 does not have a significant effect when viewed from the outside. is.

[0021] As shown in FIG. 3, the height h1 of the top surface of the first ink layer 610 is The height h1 of the upper surface of the first ink layer 610 may be lower than the height h2 of the upper surface of the second ink layer 610. The height may be equal to or greater than 1 / 5 of the height h2 of the upper surface of the first ink layer 620, but may be smaller than the height h2. The height h1 of the layer 610 can be at least 0.2 mm. The height h2 of the first inner wall may be 1 mm or less, for example, 0.5 mm to 1 mm. When the height h1 of the first ink layer 610 is less than 1 / 5 of the height h2 of the second ink layer 620, Since the height h1 of the layer 610 is very low, it is difficult to express the color red when viewed from the outside. The height h1 of the first ink layer 610 is the height from the lower surface of the ink layer 600 to the upper surface of the recess. The height h2 of the upper surface of the second ink layer 620 is The height h1 of the first ink layer 610 may be the height from the top surface of the concave portion to the top surface of the convex portion. The height h2 of the second ink layer 620 may be the height of the bottom of the convex portion. The height h1 may be the minimum thickness of the ink layer 600. The thickness h2 may be the maximum thickness of the ink layer 600.

[0022] The height h2 of the upper surface of the second ink layer 620 corresponds to the height h3 of the phosphor layer 500. The height h3 of the phosphor layer 500 is 0.5 mm or more, for example, in the range of 0.5 mm to 1 mm. Therefore, the height h1 of the first ink layer 610 is equal to the height h1 of the phosphor layer 500. In the drawing, the width of the first ink layer 610 may be set to 1 / 5 or more of the width of the second ink layer 610. The width of the layer 620 is smaller than that of the layer 620, which is necessary to realize the pattern P according to the embodiment. This is merely an example, and the width may be varied depending on the shape of the pattern P. The width of the recess in the direction may be larger than the width of the protrusion, or conversely, the width of the recess may be smaller than the width of the protrusion. The upper surface 610a of the first ink layer 610 may be the lower surface or ink layer of the first ink layer 610. The upper surface 61 of the first ink layer 610 may be arranged parallel to the lower surface of the ink layer 600. The recess 620a may be disposed parallel to the upper surface 620a of the second ink layer 620. The upper surface of the first ink layer 610 may be parallel to the upper surface of the convex portion. By forming 610a in a flat structure, the light emitted through the first ink layer 610 The upper surface of the phosphor layer 500 can have the same brightness as the lower surface of the ink layer 600. The upper surface of the phosphor layer 500 may be parallel to the lower surface of the ink layer 600. The heights of the exposed upper surfaces of the ink layers 610 and 620 can be varied. It provides a stereoscopic image when unlit, and changes color depending on the brightness level of the light when lit. The strength of the effect can be adjusted.

[0023] Referring to FIGS. 4 and 5, the first ink layer 610 is formed by The second ink layer 620 may include a region for forming the second pattern P2. When the light source 200 is turned on, the first pattern P1 and the second pattern P The first ink layer 610 has a height equal to that of the second ink layer 620. 20, the amount of light emitted from the phosphor layer 500 that is blocked is small. That is, the higher the height of the ink layer 600, the more light is blocked. The thicker the area of ​​600, the more light is blocked. The brightness of the light emitted through the recesses of the layer 610 is reduced by the brightness of the light emitted through the second ink layer 620, i.e., the protrusions. That is, the brightness of the light emitted from the recesses of the first ink layer 610 is higher than that of the light emitted from the recesses of the first ink layer 610. The brightness of the second ink layer 620 is provided in a bright red pattern, and the brightness of the first ink layer The first pattern P1 and the second pattern P2 are provided as red patterns that are darker than the brightness of 610. The red image is provided with a difference in brightness when lit. When the intensity is low, for example, below 10 candelas, the first pattern P1 and the second pattern P2 The boundary is clearly visible or distinct. Here, 10 candela is emitted in the tail mode. The brightness range of the light emitted from the light source 200 is also high, for example, 60 In the case of candela or higher, the boundary between the first pattern P1 and the second pattern P2 is invisible or indistinguishable. Here, 60 candela is the brightness range of the light emitted in stop mode. At the low level, the difference in brightness between the light emitted through the recesses and the second ink layer 620 is At the high level, the brightness of the light emitted through the recesses and the second ink layer 620 The first driving mode is a mode in which the boundary between the first pattern P1 and the second pattern P2 is The difference in brightness is large in the area between the first pattern P1 and the second pattern P2. In other words, in the tail mode, the difference in brightness between the first pattern P1 and the second pattern P2 may be small. The boundary between the two patterns P2 is clearly defined, so the lighting image is In stop mode, the lighting image is not displayed, so the driver Only the red color can be displayed without any image, guiding drivers to drive safely.

[0024] 6 to 8 are cross-sectional views showing modified examples of the ink layer of the present invention. A description of the illustrated embodiment may optionally be included.

[0025] Referring to FIG. 6, an ink layer 600 according to a modified example of the embodiment has a structure including recesses and protrusions. The ink layer 600 may include a first ink layer 610 and a second ink layer 620. The height h1 of the lowest region of the first ink layer 610 is The height h2 of the upper surface of the first ink layer 610 may be smaller than the height h2 of the upper surface of the first ink layer 620. The height h1 of the lower region is 1 / 5 or more of the height h2 of the upper surface of the second ink layer 620. The height h1 of the first ink layer 610 can be at least 0.2 mm. The height h1 of the first ink layer 610 may be increased toward the second ink layer 620. The height h1 of the first ink layer 610 is the highest in the area adjacent to the convex portion and the highest in the area far from the convex portion. The area may be as small as one end or edge of the recess in the first ink layer 610. The first ink layer 620 may have the same height as the upper surface of the second ink layer 620. The upper surface 610a of the ink layer 610, i.e., the bottom of the recess, is inclined with the upper surface 620a of the second ink layer 620. The upper surface 610a of the first ink layer 610 may have at least one or more inclined The upper surface 610a of the first ink layer 610 has two inclined surfaces at a certain angle. The inclined surface may be formed symmetrically about the center of the recess. The upper surface 620a of the first ink layer 610 can be inclined at a certain angle. 10a, that is, the bottom of the recess, is deeper toward the center of the first ink layer 610 or the center of the recess. In the above, the upper surface 610a of the first ink layer 610 or each Although the bottom of the recess is illustrated as having two inclined surfaces, it may have one inclined surface or three or more inclined surfaces. The upper surface 610a of the first ink layer 610 may be formed as an inclined surface. This allows for a gradation effect to be achieved in the lighting image. This allows the overall image to be softer and improves the aesthetic impression. The height h2 of the upper surface of the second ink layer 620 is 1 mm or less, for example, 0.5 mm to 1 mm. The height h1 of the first ink layer 610 is the height of the upper surface of the second ink layer 620. If it is less than 1 / 5 of h2, the height of the first ink layer 610 becomes very low and the In this case, it becomes difficult to express red. The height h3 of the phosphor layer 500 may be equal to or greater than 0.5 mm. For example, the height h of the first ink layer 610 can be 0.5 mm to 1 mm. The first ink 1 may be formed at a height equal to or greater than one-fifth of the height h3 of the phosphor layer 500. The width of the layer 610 is made smaller than the width of the second ink layer 620. This is because the width of the layer 610 is smaller than the width of the second ink layer 620. This is just one example of how to create a turn, and it can be set to various widths depending on the shape of the pattern. can be done.

[0026] As shown in FIG. 7, the ink layer 600 according to the modified example of the invention has a structure including recesses and protrusions. The ink layer 600 may have a first ink layer 610 and a second ink layer 620. The height h1 of the upper surface of the first ink layer 610 is greater than the height h1 of the upper surface of the second ink layer 620. The height h1 of the lowest region of the first ink layer 610 may be lower than the height h2 of the second ink layer 610. The height h2 of the upper surface of the first ink layer 610 can be 1 / 5 or more. The height h1 of the first ink layer 610 can be at least 0.2 mm. The height of the first ink layer 610 may be increased toward the second ink layer 620. The height h1 is highest in the area adjacent to the convex portion, and may be smaller in areas farther from the convex portion. One end or edge of the first ink layer 610 is at the same height as the top surface of the second ink layer 620. The upper surface 610a of the first ink layer 610 may have the same height as the second ink layer 62. The upper surface 620a of the ink jet head 10 may include an inclined surface or a curved surface having a curvature. The upper surface 610a of the layer 610 may include at least one curved surface. The line connecting the highest point to the lowest point of the layer 600 may be inclined at a certain angle. The top surface 610a of the first ink layer 610 or the bottom of the recess is located at the center of the first ink layer 610, i.e., the bottom of the recess. The upper surface 610a may have a concave curved surface. The curved surface may have a hemispherical shape. The upper surface 610a of the light source 600 is curved, which gives a gradation effect to the lighting image. This allows the overall image to be realized in a softer way, improving the aesthetic sense. It can be done.

[0027] The height h2 of the second ink layer 620 is 1 mm or less, for example, 0.5 mm to 1 mm. The height h1 of the first ink layer 610 is 1 / 2 the height h2 of the second ink layer 620. If the thickness is less than 5, the height of the first ink layer 610 becomes very low and the color becomes red when viewed from the outside. The height h2 of the second ink layer 620 corresponds to the height h3 of the phosphor layer 500. The height h3 of the phosphor layer 500 is 0.5 mm or more, for example, 0.5 mm to 1. Therefore, the height h1 of the first ink layer 610 can be In the drawing, the width of the first ink layer 610 is set to be equal to or greater than 1 / 5 of the height h3. The width of the insulating layer 620 is smaller than that of the insulating layer 620, which is necessary to realize the pattern according to the embodiment. This is merely an example, and the width range can be set in various ways depending on the shape of the pattern.

[0028] As shown in FIG. 8, the ink layer 600 according to the modified example of the embodiment has a structure including recesses and protrusions. The ink layer 600 may have a structure including a first ink layer 610 and a second ink layer 620. The first ink layer 610 may include a plurality of layers having different heights. For example, the first ink layer 610 can be formed by a first ink layer 611 and a second ink layer 612. The first ink layer 611 may include a second ink layer 620. The ink layer 620 is disposed between the first and second ink layers 612 and 623, or between the second ink layer 620 and the first and second ink layers 623 and 624. The first ink layer 6 may be disposed adjacent to at least one of the first ink layer 6 and the second ink layer 12. 12 is disposed between the first ink layer 611 and the second ink layer 620, or The ink layer 620 and the first-second ink layer 612 are disposed adjacent to each other. The first ink layer 610 may include a plurality of recesses. The layer 610 may include recesses with a stepped structure. The height h11 of the upper surface of the first-first ink layer 611 may be The height h12 of the upper surface of the first-2 ink layer 612 may be higher than the height h12 of the upper surface of the first-1 ink layer 6 The height h11 of the upper surface of the second ink layer 620 may be lower than the height h2 of the upper surface of the second ink layer 620. The height h12 of the upper surface of the first-second ink layer 612 is set to a minimum of 0.2 mm or more. As a result, the ink layer 600 may be divided into three layers, for example, a first ink layer 611, The first and second ink layers 612 and 620 are included, and an image is formed by three colors. The width of the 1-1 ink layer 611 and the width of the 1-2 ink layer 620 are The widths of the first ink layer 611 in the horizontal direction may be the same or different. The width of the first and second ink layers 612 may be varied depending on the shape of the pattern. The first ink layer 611 and the first ink layer 612 may be disposed in the recesses.

[0029] The upper surface of the 1-1 ink layer 611 is formed parallel to the upper surface of the second ink layer 612. The upper surface of the 1-1 ink layer 611 may be flat with the upper surface of the 1-2 ink layer 612. The first-first ink layer 611 may be a first recess, and the When the 1-2 ink layer 612 is the second recess, the upper surface of the first recess is parallel to the upper surface of the second recess. The upper surface of the first recess and the upper surface of the second recess may be parallel to the upper surface of the protrusion. The recessed portion may include a plurality of bottom surfaces having different heights.

[0030] The upper surface of the 1-1 ink layer 611 is located at a higher position than the upper surface of the 1-2 ink layer 612. The upper surface of the 1-1 ink layer 611 may be located lower than the upper surface of the second ink layer 620. The height h2 of the upper surface of the second ink layer 620 is 1 mm or less, for example, 0 The height h12 of the upper surface of the first-second ink layer 612 can be 0.5 mm to 1 mm. When the height h2 of the upper surface of the second ink layer 620 is less than 1 / 5, the upper surface of the first-second ink layer 612 The surface height becomes very low, making it difficult to express the color red when viewed from the outside. The height h2 of the upper surface of 620 may be the same as the height h3 of the phosphor layer 500. The height h3 or thickness of 500 is 0.5 mm or more, for example, 0.5 mm to 1 mm. Therefore, the height h12 of the upper surface of the first-second ink layer 612 is equal to the height h12 of the phosphor layer 500. In the drawing, the width of the first ink layer 610 may be set to be equal to or greater than 1 / 5 of the width h3 of the second ink layer. The width of the insulating layer 620 is smaller than that of the insulating layer 620, which is necessary to realize the pattern according to the embodiment. This is just an example, and various widths can be set depending on the shape of the pattern. It is possible to effectively realize more diverse patterns, such as realizing two or more different colors. Or, two or more layers with different inks are alternately printed in the vertical direction. By placing them at different heights, it is possible to create a three-dimensional effect of an image with a given shape. Here, the ink powders of the first and second ink layers may be the same or different, The image of the outer frame can be presented as a three-dimensional image by using the step structure or depth difference. The ink powders in the first and second layers of the first ink layer may be the same or different. It is possible to provide a three-dimensional image by utilizing the step structure or depth difference of the surface image. When the ink powder in the first and second ink layers is made of the same material, the ink layers are and a protrusion having a convex shape on the outside of the recess.

[0031] FIG. 9 is a schematic perspective view showing a vehicle rear lamp equipped with a lighting device according to an embodiment of the invention. As shown in FIG. 9, the vehicle lamp includes a rear panel 2000 and the rear panel 2 1000. The lighting device 1000 may include a plurality of lighting devices 1000 coupled to each other. The lighting device 1000 may be a module as disclosed above. They are installed in the rake lamp area and turn signal lamp area. The lighting device 1000 arranged in the area is a tail light that notifies the vehicle behind of the vehicle's location when driving at night. In addition, the lighting device 1000 can notify the vehicles behind that the vehicle is approaching. It can also function as a stop light to let you know you are speeding. The lighting device 1000 arranged in the area is intended to function as a signal, and indicates the direction in which the vehicle is going to proceed. The rear panel 2000 is connected to a lighting device 1000. The connection portion may be formed so that the rear panel can be connected to the connector. The connection portion may be configured separately from the rear panel. Alternatively, it may be formed integrally with the rear panel 2000. The lighting device 1000 to be combined is coupled to the rear panel or connector in a sliding manner. For example, the lighting device 1000 may have exposed terminals on the board and a corresponding rear panel. The panel 2000 or the connection section has contact terminals formed thereon that are electrically connected to the terminals of the substrate. In the above, the vehicle lamp has been described as an example of a rear lamp of a vehicle. It is not limited to the front lamps or mood lamps of vehicles and other lamp structures. It may include a structure.

Claims

1. A substrate; a plurality of light sources disposed on the substrate; a resin layer disposed on the substrate and the plurality of light sources; a phosphor layer disposed on the resin layer; an ink layer disposed on the phosphor layer; The ink layer is formed by dividing the first ink layer and the upper surface of the phosphor layer into two layers. A lighting device having a greater height.

2. 2. The ink jet recording method according to claim 1, wherein the height of the first ink layer is equal to or greater than 1 / 5 of the height of the second ink layer. The described lighting device.

3. 3. The ink jet recording method according to claim 2, wherein the upper surface of the first ink layer is parallel to the upper surface of the second ink layer. Lighting equipment.

4. 4. The method according to claim 3, wherein the first ink layer includes a plurality of ink layers having different heights. On-board lighting device.

5. The upper surface of the first ink layer is formed at an incline with respect to the upper surface of the second ink layer.

3. The lighting device according to claim 2.

6. The lighting device of claim 5 , wherein the top surface of the first ink layer includes a curved surface.

7. 2. The lighting device according to claim 1, wherein the height of the second ink layer corresponds to the thickness of the phosphor layer. Place.

8. The first ink layer is formed by dividing the first ink layer by the first ink layer and the upper surface of the phosphor layer.

5. The lighting device of claim 4, further comprising a first-second ink layer having a height smaller than that of the first ink layer. Place.

9. The widths of the 1-1 ink layer, the 1-2 ink layer and the 2nd ink layer are 9. The lighting device of claim 8, wherein the first and second electrodes are different.

10. The first ink layer is illuminated with a first pattern of light by the light emitted from the plurality of light sources. The second ink layer embodies a second pattern of light having a shape different from that of the first pattern. 、 When the luminance of the light is 10 candela or less, the brightness of the region of the first pattern is Brighter than the brightness of the second pattern area, When the luminance of the light is 60 candela or more, the brightness of the region of the first pattern is The lighting device of claim 1 , wherein the brightness corresponds to the brightness of the region of the second pattern.

Images