Lighting device and lamp comprising same
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-02-05
- Publication Date
- 2026-08-13
Smart Images
Figure KR2026002184_13082026_PF_FP_ABST
Abstract
Description
Lighting device and lamp including the same
[0001] The present invention relates to a lighting device and a lamp including the same.
[0002] Generally, the main components of a lamp include a lighting device, housing, bezel, and bracket. Here, the housing, bezel, and bracket serve as components for securing the lighting device inside the vehicle; they occupy a significant amount of space and have a complex structure. Furthermore, to secure the lighting device, the housing, bezel, and bracket are formed from materials with high rigidity.
[0003] However, in the event of a collision between a vehicle and a pedestrian, even a minor collision can result in serious injuries due to high-rigidity components. In this regard, some countries are implementing regulations regarding the rigidity of vehicle interior components.
[0004] One of the technical problems of the present invention is to provide a lighting device having a back cover portion that absorbs light around a lighting area where light is emitted, and a lamp including the same.
[0005] In addition, it provides lighting devices and lamps with improved waterproof and dustproof functions in the joint area between the lighting device configuration and vehicle parts.
[0006] In addition, it provides lighting devices and lamps that are structurally simplified to secure space inside the vehicle.
[0007] A lighting device according to an embodiment comprises a substrate, a plurality of light sources disposed on the substrate, a resin layer disposed on the substrate and sealing the plurality of light sources, a diffusion layer disposed on the resin layer, a light-transmitting layer covering the upper surface and side of the diffusion layer, and a back cover portion covering the lower surface and side of the substrate, wherein the back cover portion extends to the lower surface of the substrate and the outer lower surface of the light-transmitting layer, and the light-transmitting layer can be coupled to the back cover portion.
[0008] Additionally, the light-transmitting layer may include a side portion covering the side of the diffusion layer and a connecting portion extending from the side portion and coupled to the back cover portion.
[0009] Additionally, the coupling portion further includes an extension portion extending in a direction parallel to the extension direction of the substrate and a protrusion portion protruding from the extension portion toward the back cover portion, and one surface of the extension portion may contact the back cover portion.
[0010] In addition, the back cover portion includes a recess portion formed concavely, and the protrusion portion can be coupled to the recess portion.
[0011] In addition, the above protrusion includes a plurality of first coupling protrusions, and the coupling protrusions can be fused to the back cover part.
[0012] Additionally, the recess portion includes a plurality of second coupling protrusions, the second coupling protrusions are arranged to intersect with the first coupling protrusions, and the first and second coupling protrusions can be fused to the protrusion and the recess portion.
[0013] A lamp according to an embodiment comprises a substrate, a plurality of light sources disposed on the substrate, a resin layer disposed on the substrate and sealing the plurality of light sources, a diffusion layer disposed on the resin layer, a back cover portion covering the lower and side portions of the substrate, and a cover plate having a seating portion on which the diffusion layer is seated, and the cover plate may have a transparent portion through which light emitted from the plurality of light sources is transmitted.
[0014] Additionally, the cover plate further includes a fixing portion formed on the inner side of the vehicle, and the back cover portion includes a cover coupling portion protruding in a direction perpendicular to the extension direction of the substrate, and the fixing portion has a concave groove in the direction toward the resin layer from the back cover portion, and the cover coupling portion can be inserted into the groove of the fixing portion.
[0015] In addition, the upper surface of the cover coupling portion may be positioned lower than the upper surface of the diffusion layer.
[0016] In addition, the cover coupling portion has a plurality of third coupling protrusions, and the third coupling protrusions can be coupled to the grooves of the fixing portion.
[0017] In addition, the back cover portion includes a vent portion having a vent hole, and the vent portion may not overlap in a vertical direction with the resin layer and the diffusion layer.
[0018] In addition, the back cover portion includes a vent portion having a vent hole, and the vent portion may not overlap with the substrate in a vertical direction.
[0019] According to the lighting device and lamp including the same of an embodiment of the invention, absorption performance can be improved by placing a back cover portion including silicone at the bottom of the lighting device.
[0020] In addition, by placing the back cover on the lower surface of the substrate, waterproof and dustproof performance can be improved.
[0021] In addition, since the back cover is coupled to the cover plate, rigid brackets, bezels, housings, etc. are unnecessary, thereby securing space inside the vehicle.
[0022] In addition, a vent hole is formed in the back cover so that moisture from the lighting device can be removed.
[0023] FIG. 1 illustrates a lamp including a lighting device according to a first embodiment of the present invention.
[0024] Figure 2 is an enlarged view of area A in Figure 1.
[0025] FIGS. 3a and FIGS. 3b respectively show variations of the first embodiment.
[0026] FIG. 4 illustrates a lamp including a lighting device according to a second embodiment of the present invention.
[0027] Figure 5 shows a cross-section of region B in Figure 4.
[0028] FIGS. 6a and FIGS. 6b respectively show variations of the second embodiment.
[0029] FIG. 7 shows an example of a cross-sectional view of a lighting device according to a second embodiment.
[0030] FIG. 8 is a first variation of a lighting device according to a second embodiment.
[0031] FIG. 9 is a second modified example of a lighting device according to a second embodiment.
[0032] FIG. 10 is a third variation of a lighting device according to a second embodiment.
[0033] FIG. 11 is a cross-sectional view of a lighting device according to a third embodiment.
[0034] FIG. 12 is a modified example of the lighting device of the third embodiment.
[0035] FIG. 13 shows a method for manufacturing a lighting device of the first embodiment.
[0036] FIG. 14 shows a method for manufacturing a lighting device of the second embodiment.
[0037] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. The suffixes 'module' and 'part' for components used in the following description are assigned or used interchangeably for the sake of ease of drafting the specification and do not inherently possess distinct meanings or roles. Furthermore, the attached drawings are intended to facilitate an easy understanding of the embodiments disclosed in this specification, and the technical concepts disclosed in this specification are not limited by the attached drawings. Additionally, when an element such as a layer, region, or substrate is referred to as existing 'on' another component, this includes existing directly on the other element or having other intermediate elements existing between them.
[0038]
[0039] FIG. 1 illustrates a lamp including a lighting device according to a first embodiment of the present invention, FIG. 2 is an enlarged view of area A of FIG. 1, and FIG. 3a and FIG. 3b respectively show variations of the first embodiment.
[0040] Referring to FIGS. 1 to 3, in the first embodiment, the lamp (1000) may be a lamp of a movable means, such as a vehicle lamp. The lamp (1000) may include a lighting device (10) and a cover plate (900). The cover plate (900) may be a bumper or a grille. The lighting device (10) may be coupled to a coupling hole (900a) disposed in the cover plate (900). A part of the lighting device (10) may protrude through the coupling hole (900a). A part of the lighting device (10) may emit light through the coupling hole (900a). At least a part of the cover plate (900) may have an area facing the lighting device (10).
[0041] A lighting device (10) according to a first embodiment may include a substrate (100), a plurality of light sources (150) disposed on the substrate (100), a resin layer (200) that seals the plurality of light sources (150), a diffusion layer (300) that covers the resin layer (200), a light-transmitting layer (400) that covers the diffusion layer (300) and the substrate (100), and a back cover portion (500) disposed on the other side of the substrate (100) and on the outside of the light-transmitting layer (400) and coupled with the light-transmitting layer (400). The light-transmitting layer (400) may be a lens portion or an inner lens. The light-transmitting layer (400) may be a transparent lens or a lens having red or white color.
[0042] A portion of the light-transmitting layer (400) of the lighting device (10) may protrude into the coupling hole (900a). At least 30% of the height of the light-transmitting layer (400) of the lighting device (10) may protrude into the coupling hole (900a). The light-transmitting layer (400) may be a lighting area on the cover plate (900). The light sources (150) are arranged on one side of the substrate (100), and the other side is the opposite side of the one side.
[0043]
[0044] The substrate (100) may include a printed circuit board (PCB). The substrate (100) may include, for example, at least one of a resin-based printed circuit board (PCB), a metal core PCB, a flexible PCB, a ceramic PCB, or an FR-4 substrate. If the substrate (100) is a flexible PCB, the lighting device (10) may have flexible characteristics. The substrate (100) may be electrically connected to the plurality of light sources (150). The substrate (100) may be a single-layer substrate having a single wiring layer or a multi-layer substrate having a plurality of wiring layers.
[0045] The plurality of light sources (150) may be disposed on the substrate (100) and emit light in a direction (Z-axis direction) toward the diffusion layer (300). The plurality of light sources (150) may be arranged in parallel in a first direction (X-axis). Additionally, the plurality of light sources (150) may be arranged in parallel along the first direction and the second direction (Y-axis). For example, the plurality of light sources (150) may be arranged in n rows (where n is an integer greater than or equal to 1) and m columns (where m is an integer greater than or equal to 1). The plurality of light sources may have a first pitch in the first direction (X-axis direction) and a second pitch in the second direction (Y-axis direction). The first pitch and the second pitch may be the same or different.
[0046] The plurality of light sources (150) are light-emitting devices having light-emitting diode chips (LED Chips), and may include various forms such as packages in which the light-emitting diode chips are packaged, flip-chips, and CSPs (Chip scale packages). The light-emitting diode chips may emit at least one of blue, red, green, ultraviolet (UV), or infrared light, and the light sources (150) may emit at least one of white, blue, red, green, or infrared light, and may emit light in a colored light such as white, blue, or green. The light-emitting devices of the light sources (150) include mini LED chips or micro LED chips. The plurality of light sources (150) may include phosphors placed on the light-emitting chips. The phosphors may be selectively formed from quantum dots, YAG, TAG, silicate, nitride, and oxy-nitride-based materials. The phosphors may include at least one of red phosphors, yellow phosphors, and green phosphors, but are not limited thereto.
[0047] The resin layer (200) may be disposed on the substrate (100) to seal and protect the plurality of light sources (150). As another example, the substrate (100) may further include a reflective layer (not shown) having through holes through which the plurality of light sources pass. In this case, the resin layer (200) may be disposed on the reflective layer (not shown) and may seal the plurality of light sources (150).
[0048] The resin layer (200) may be disposed with an area equal to or smaller than the area of the substrate (100). The resin layer (200) may be a resin material such as silicone or epoxy, or may include at least one of a plastic resin material such as polyester (PET) film, PMMA (Poly Methyl Methacrylate) material, or PC (Poly Carbonate). Preferably, the resin layer (200) may be silicone or PMMA. Alternatively, the resin layer (200) may use a resin material with urethane acrylate oligomer as the main raw material.
[0049] The above diffusion layer (300) is disposed on the resin layer (200), and the diffusion layer (300) can cover the upper surface and side surface of the resin layer (200).
[0050] The above diffusion layer (300) diffuses light emitted from the plurality of light sources (150) into a uniform light distribution, so that the lighting device (10) can form a surface light source. The above diffusion layer (300) may be formed of a resin material such as silicone or epoxy. The above diffusion layer (300) may be a transparent resin material. The above diffusion layer (300) may contain a diffusing agent inside, and the diffusing agent may include at least one of Al2O3, TiO2, SiO2, ZnO, and ZrO2. The above diffusion layer (300) may be formed of a transparent resin or a translucent resin material. As another example, in the lighting device (10) according to the embodiment, a phosphor layer (not shown) may be disposed in place of the above diffusion layer (300). The phosphor layer may include materials such as silicone, epoxy, glass, polyimide, PMMA, etc. The above phosphor layer may optionally include phosphor particles of YAG, TAG, Silicate, Nitride, and Oxy-nitride-based materials.
[0051] The light-transmitting layer (400) may be disposed on the diffusion layer (300). An air gap may be formed between the light-transmitting layer (400) and the diffusion layer (300). As another example, the light-transmitting layer (400) and the diffusion layer (300) may be in contact, and there may be no air gap between the light-transmitting layer (400) and the diffusion layer (300). The upper surface thickness (d1) of the light-transmitting layer (400) may be equal to or smaller than the thickness (d2) of the back cover portion. The thickness (d1) of the light-transmitting layer (400) may have a range of 3 mm to 5 mm. If the thickness (d1) of the light-transmitting layer (400) is less than 3 mm, it may be vulnerable to impact and its optical performance may be degraded. On the other hand, if the thickness (d1) of the light-transmitting layer (400) exceeds 5mm, the total weight of the lighting device increases and the light loss may increase.
[0052] The light-transmitting layer (400) may be mounted in the coupling hole (900a) of the cover plate (900). The light-transmitting layer (400) may include a side portion (410) that is seated in the coupling hole (900a) and a coupling portion (420) that extends in a direction parallel to the substrate from the end of the side portion (410). The coupling portion (420) may include an extension portion (421) that extends in a direction parallel to the substrate (100) and a protrusion portion (422) that protrudes from the extension portion (421) toward the back cover portion (500).
[0053] One side of the extension (421) of the light-transmitting layer (400) may be in contact with the cover plate (900), and the other side of the extension (421) may be in contact with the back cover portion (500). The extension (421) may be joined to the cover plate (900) by screw fastening, welding, adhesive, etc.
[0054] The back cover portion (500) may be disposed on the lower part of the substrate (100). The back cover portion (500) may seal the lower surface and the side surface of the substrate (100). The back cover portion (500) may include silicone. The back cover portion (500) may include black silicone. For example, the back cover portion (500) may include carbon black. The shock absorption function may be improved by having a material with lower rigidity than metal for the back cover portion (500).
[0055] The thickness (d2) of the back cover portion may range from 1 mm to 5 mm. If the thickness (d2) of the back cover portion (500) is less than 1 mm, the light shielding performance is reduced and the mechanical rigidity is reduced, so it may be easily deformed by impact and pressure. On the other hand, if the thickness (d2) of the back cover portion (500) exceeds 5 mm, a problem may arise where the weight of the lighting device increases.
[0056] The back cover portion (500) may include a recess (510) that is coupled to a protrusion (422) of the light-transmitting layer (400). The recess (510) may have an internal space (S) into which the protrusion (422) is inserted. The internal space (S) of the recess (510) may have a shape corresponding to the shape of the protrusion (422). The inner surface (511) of the recess (510) forming the internal space (S) may come into contact with the protrusion (422). The recess (510) is formed concavely in the direction toward the back cover portion (500) from the cover plate (900) and may be arranged in a continuous or discontinuous shape along the outer upper surface of the back cover portion (500). The depth of the recess (510) may be greater than or equal to the protrusion length of the protrusion (422) of the light-transmitting layer (500). The inner surface (511) of the recess (510) and the protrusion (422) can be joined by a hot melting process. Here, the back cover portion (500) and the light-transmitting layer (400) may be thermoplastic resin.
[0057] A portion of the back cover portion (500) and a portion of the light-transmitting layer (400) may be joined together. At least one or both of the back cover portion (500) and the light-transmitting layer (400) may be joined by melting and bonding them together through the hot melting process or by extrusion. The inner surface of the recess (510) and the protrusion (422) may be bonded with an adhesive.
[0058] Referring to FIG. 3a, the protrusion (422) may have a plurality of first connecting protrusions (422a) protruding from the protrusion (422). The first connecting protrusions (422a) may come into contact with the inner surface (511) of the recess (510). The first connecting protrusions (422a) may be coupled with the inner surface (511) of the recess to improve adhesion.
[0059] In the second direction (Y), the width of the substrate (100) may be greater than the maximum width of the resin layer (200). In the second direction (Y), the width of the substrate (100) may be greater than the width of the diffusion layer (300). That is, the outer side of the upper surface of the substrate (100) may be positioned further outward than the edge of the diffusion layer (300).
[0060] The maximum width (W2) of the light-transmitting layer (400) may be greater than the width (W1) of the coupling hole (900a). In the second direction, the maximum width (W2) of the light-transmitting layer (400) may be equal to or smaller than the width of the back cover portion (500). In the second direction (Y), the width of the back cover portion (500) may be greater than the width of the substrate (100).
[0061] The back cover portion (500) has a storage portion (500a) on its upper side, and the bottom surface area of the storage portion (500a) may be equal to the bottom surface area of the substrate (100). That is, the substrate (100) may be in close contact with the storage portion (500a). The depth of the storage portion (500a) may be equal to the thickness of the substrate (100).
[0062] The outer upper surface of the back cover portion (500) may come into contact with the outer lower surface of the light-transmitting layer (400). The outer upper surface of the back cover portion (500) may come into contact with different areas of the outer lower surface of the light-transmitting layer (400) in different areas.
[0063] As another example, as shown in FIG. 3b, the recess (510) may include a second coupling projection (511a) protruding from the inner surface (511) of the recess (510). The second coupling projection (511a) may come into contact with the protrusion (422). The protrusion (422) may have a fastening groove (422b) into which the second coupling projection (511a) is coupled. As yet another example, the first coupling projection (422a) and the second coupling projection (511a) may be arranged to intersect each other. The first coupling projection (422a) and the second coupling projection (511a) may be coupled.
[0064] The outer surface of the back cover portion (500) may be placed in the same plane as the outer surface of the extension portion (421) of the light-transmitting layer (400) or may be extended further. As a result, the back cover portion (500) covers the light-transmitting layer (400), thereby improving the waterproof / dustproof function. The invention may have at least one or all of the coupling structures between the back cover portion (500) and the light-transmitting layer (400) of FIG. 3a and FIG. 3b.
[0065]
[0066] FIG. 4 illustrates a lamp including a lighting device according to a second embodiment of the present invention, FIG. 5 shows a cross-section of region B of FIG. 4, and FIG. 6a and FIG. 6b respectively show variations of the second embodiment.
[0067] Referring to FIGS. 4 through 6, a lamp (1000A) according to a second embodiment includes a cover plate (900) and a lighting device (10A). The lamp (1000A) according to the second embodiment may not expose the lighting device (10A) to the outside. The cover plate (900) may have a transparent portion (901) through which light from the lighting device (10A) is emitted. The transparent portion (901) may be laser-etched to have a fine gap. Light emitted from the lighting device (10A) may pass through the transparent portion (901). As another example, the transparent portion (901) may include a light-transmitting material so that light emitted from the lighting device (10A) may be transmitted.
[0068] The lighting device (10A) may include the substrate (100), a plurality of light sources (150) disposed on the substrate (100), a resin layer (200) that seals the plurality of light sources (150), a diffusion layer (300) that covers the resin layer (200), and a back cover portion (500) disposed on the lower part of the substrate (100).
[0069] The back cover portion (500) of the lighting device (10A) may have a cover coupling portion (550) that is coupled to the cover plate (900). The cover coupling portion (550) may protrude in a direction perpendicular to the extension direction of the substrate (100) (Z-axis direction). The thickness of the back cover portion (500) may be equal to or smaller than the thickness of the transparent portion (901) of the cover plate (900).
[0070] The above cover plate (900) may include a seating portion (950) coupled to the back cover portion (500) and a fixing portion (13) coupled to the back cover portion (500). The lighting device (10A) may be seated on the seating portion (950). The seating portion (950) may correspond to the shape of the diffusion layer (300) of the lighting device.
[0071] The fixed portion (13) may have a groove (G) into which the cover coupling portion (550) of the back cover portion (500) is inserted. The groove (G) and the cover coupling portion (550) may have corresponding shapes. The cover coupling portion (550) may be inserted into the groove (G) and fused with the inner surface of the fixed portion (13). The fusion may be achieved by a hot melting process, in which the inner surface of the fixed portion (13) and a portion of the cover coupling portion (550) are joined in multiple areas. The upper surface of the cover coupling portion (550) may be positioned lower than the upper surface of the diffusion layer (300).
[0072] Referring to FIG. 6a, for example, the cover coupling portion (550) according to the embodiment may have a plurality of third coupling protrusions (550a). The third coupling protrusions (550a) may be fused with the inner surface of the groove (G) to improve the fastening force. As another example, as shown in FIG. 6b, the fixing portion (13) according to the embodiment may have a plurality of fourth coupling protrusions (13a) formed on the inner side of the groove (G). The fourth coupling protrusions (13a) may be fused with the cover coupling portion (550). As yet another example, the third coupling protrusions (550a) and the fourth coupling protrusions (13a) may be arranged to intersect each other on the inner side of the groove (G). As a result, the fastening force between the fixing portion (13) and the back cover portion (500) can be further improved and sealed more airtightly. The invention may have at least one or all of the coupling structures between the back cover part (500) and the fixing part (13) of FIG. 6a and FIG. 6b.
[0073] The groove (G) of the fixing part (13) is formed concavely in the direction toward the substrate (100) from the back cover part (500), and can be arranged in a continuous or discontinuous shape along the outer upper surface of the back cover part (500). The depth of the groove (G) of the fixing part (13) may be greater than the protruding length of the cover coupling part (550) of the back cover part (500).
[0074] FIG. 7 shows a cross-sectional example of a lighting device according to a second embodiment, FIG. 8 shows a first modified example of a lighting device according to a second embodiment, FIG. 9 shows a second modified example of a lighting device according to a second embodiment, and FIG. 10 shows a third modified example of a lighting device according to a second embodiment.
[0075] Referring to FIG. 7, the diffusion layer (300) of the lighting device according to the embodiment may be placed only on the upper surface of the resin layer (200) and not on the side of the resin layer (200). By not placing the diffusion layer (300) on the side of the resin layer (200), the total weight of the lighting device may be reduced.
[0076] Referring to FIG. 8, the lighting device (10A) according to the embodiment may further include the substrate (100), a plurality of light sources (150) disposed on the substrate (100), a resin layer (200) that seals the plurality of light sources (150), a diffusion layer (300) that covers the resin layer (200), and a light-blocking layer (50) disposed between the resin layer (200) and the diffusion layer (300).
[0077] The light-blocking layer (50) may be arranged to overlap in a direction perpendicular to the plurality of light sources (150). The light-blocking layer (50) may block or partially transmit light emitted from the plurality of light sources (150). The light-blocking layer (50) may be a silicon containing a black dye, a black ink layer, or a metal pattern layer. The light-blocking layer (50) may prevent hot spot phenomena.
[0078] Referring to FIG. 9, a lighting device according to an embodiment may have a substrate (100), a plurality of light sources (150) disposed on the substrate (100), and a resin layer (200) that seals the plurality of light sources (150). Since the lighting device does not have a diffusion layer, a light-transmitting layer, etc., it may be lighter.
[0079] Referring to FIG. 10, a lighting device according to an embodiment includes a resin layer (200) and a diffusion layer (300) disposed on the resin layer, and the diffusion layer (300) may have a curved portion (301) that has curvature and extends in the direction of the substrate (100). The curved portion (301) may be formed by a molding process at the interface between the substrate (100) and the mold.
[0080] FIG. 11 is a cross-sectional view of a lighting device according to a third embodiment, and FIG. 12 is a modified example of the lighting device of the third embodiment.
[0081] Referring to FIG. 11(a) and (b), a lighting device according to the third embodiment may include a vent portion (501) having at least one vent hole (H) in a back cover portion (500). The vent portion (501) may be formed more concavely than the back cover portion (500).
[0082] The above vent hole (H) may be formed at a location that does not overlap in a vertical direction with the substrate (100). As another example, the vent hole (H) may overlap with a dummy area of the substrate (100). In other words, the vent hole (H) may not overlap in a vertical direction with the area where the resin layer (200) and the diffusion layer (300) are placed. Internal moisture of the lighting device may be removed through the vent portion (501). A vent wrap (60) may be attached to the vent portion (501).
[0083] Referring to FIG. 12, the vent portion (501) of the lighting device may have a vent projection (502) protruding from the back cover portion (500). The vent projection (502) may have a vent hole (H). The thickness of the vent projection (502) may be less than or equal to the thickness of the back cover portion (500). A vent cap (70) may be placed over the vent projection (502). The vent cap (70) may cover the vent projection (502).
[0084] The vent protrusion (502) may not overlap in a vertical direction with the substrate (100). As another example, the vent protrusion (502) may overlap in a vertical direction with the substrate (100) but may not overlap in a vertical direction with the resin layer or / and the diffusion layer (300). That is, it may overlap with the dummy region of the substrate (100) and may not overlap with the light-emitting region.
[0085] In FIGS. 11 and 12 above, the size of the vent portion (501) and the vent hole (H) is shown as large, but the size of the vent portion (501) and the vent hole (H) may differ from that shown.
[0086] FIG. 13 shows a method for manufacturing a lighting device of the first embodiment, and FIG. 14 shows a method for manufacturing a lighting device of the second embodiment.
[0087] Referring to FIG. 13, the resin layer (200) and the diffusion layer (300) can be formed on the substrate (100) on which the plurality of light sources (150) are arranged using a compression / injection method. Subsequently, a step of forming the back cover portion (500) on the lower part of the substrate (100) may be performed. For example, the back cover portion (500) can be manufactured in a mold having a shape corresponding to the back cover portion (500) and then bonded to the lower part of the substrate (100). As another example, the diffusion layer, the resin layer (200), and the substrate (100) can be cured sequentially through a compression / injection method in a mold having a shape corresponding to the outer surface of the back cover portion (500), the substrate (100), and the diffusion layer (300), and then the back cover portion (500) can be molded and cured to form an integral structure. In the step of forming the back cover portion (500), the back cover portion (500) may have a recess (510).
[0088] Next, a step of joining the connecting portion (420) of the light-transmitting layer (400) to a plurality of recesses (510) of the back cover portion (500) may be performed. At this time, the light-transmitting layer (400) may be manufactured in a separate mold, and then the extension portion (421) and protrusion portion (422) of the connecting portion (420) and the recesses (510) of the back cover portion (500) may be fused using a hot melting method. As another example, the light-transmitting layer (400) may be formed by applying it onto the back cover portion (500) and the diffusion layer (300) through a dispensing molding process.
[0089] Although not shown in the illustration, a lamp can be manufactured by combining the extension (421) of the light-transmitting layer (400) of the lighting device and the cover plate (900).
[0090] Referring to FIG. 14, the resin layer (200) and the diffusion layer (300) can be formed on the substrate (100) on which the plurality of light sources (150) are arranged using a compression / injection method. Subsequently, a step of forming the back cover portion (500) on the lower part of the substrate (100) may be performed. For example, the back cover portion (500) can be manufactured in a mold having a shape corresponding to the back cover portion (500) and then attached to the lower part of the substrate (100). As another example, the diffusion layer, the resin layer (200), and the substrate (100) can be cured sequentially through a compression / injection method in a mold having a shape corresponding to the outer surface of the back cover portion (500), the substrate (100), and the diffusion layer (300), and then the back cover portion (500) can be molded and cured to form an integral structure. In the step of forming the back cover portion (500), the back cover portion (500) may have the plurality of cover coupling portions (550).
[0091] Next, a step of joining the back cover portion (500) to the cover plate (900) may be performed. The cover joining portion (550) of the back cover portion (500) may be inserted into the fixing portion (130) of the cover plate (900) and joined by a hot melting process. As a result, the manufacturing process may be simplified.
[0092]
[0093] The lighting device according to the embodiment can reduce light leakage by placing a back cover portion that absorbs light around the perimeter of the lighting area, and can improve waterproof and dustproof performance in the coupling area between the lighting device and a vehicle component (e.g., cover plate). In addition, shock absorption performance can be improved by forming the back cover portion with a material of relatively low rigidity, such as silicone, and the structure can be simplified by reducing the need for rigid components such as brackets, bezels, and housings, thereby contributing to securing interior space in the vehicle. Therefore, in the field of automotive lamps and lighting modules, it can be applied to various products such as lighting devices coupled to bumpers / grills / cover plates, exterior / interior decorative lighting, and signature lighting. Furthermore, by configuring a vent portion including a vent hole, moisture can be removed from inside the lighting device, which can be usefully utilized to improve the reliability of vehicle components.
[0094]
[0095] Although the above description has focused on the embodiments, this is merely an example and is not intended to limit the embodiments. A person skilled in the art will understand that various modifications and applications not exemplified above are possible within the scope of the essential characteristics of the embodiments. For instance, each component specifically shown in the embodiments may be modified and implemented. Furthermore, differences related to such modifications and applications should be interpreted as being included within the scope of the embodiments set forth in the appended claims.
Claims
1. Substrate; A plurality of light sources disposed on the above substrate; A resin layer disposed on the substrate and sealing the plurality of light sources; A diffusion layer disposed on the above resin layer; A light-transmitting layer covering the upper and side surfaces of the above-mentioned diffusion layer and It includes a back cover portion that covers the lower and side portions of the substrate, and The above back cover portion extends to the lower surface of the substrate and the outer lower surface of the light-transmitting layer, and The light-transmitting layer is a lighting device combined with the back cover portion.
2. In Paragraph 1, The light-transmitting layer above includes a side portion covering the side of the diffusion layer; and A lighting device comprising a coupling portion extending from the above-mentioned side portion and coupled to the above-mentioned back cover portion.
3. In Paragraph 2, The above-mentioned coupling portion is an extension portion extending in a direction parallel to the extension direction of the substrate and It further includes a protrusion that protrudes from the extension portion toward the back cover portion, and One side of the above extension is a lighting device that contacts the above back cover.
4. In Paragraph 3, The above back cover portion includes a recess portion formed in a concave shape, and The above protrusion is a lighting device coupled to the above recess.
5. In any one of paragraphs 3 to 4, The above protrusion includes a plurality of first connecting protrusions, and The above-mentioned coupling projection is a lighting device that is fused to the above-mentioned back cover part.
6. In Paragraph 5, The above recess portion includes a plurality of second connecting protrusions, and The second coupling projection is arranged to intersect with the first coupling projection, and The first and second connecting protrusions are a lighting device that is fused to the protrusion and the recess.
7. Substrate; A plurality of light sources disposed on the above substrate; A resin layer disposed on the substrate and sealing the plurality of light sources; A diffusion layer disposed on the above resin layer; A back cover portion covering the lower and side of the substrate; and It includes a cover plate having a seating portion on which the above-mentioned diffusion layer is seated, and The above cover plate is a lamp having a transparent portion through which light emitted from the plurality of light sources is transmitted.
8. In Paragraph 7, The above cover plate further includes a fixing part formed on the inner side of the vehicle, and The above back cover portion includes a cover coupling portion that protrudes in a direction perpendicular to the extension direction of the substrate, and The above fixing part has a concave groove in the direction toward the resin layer from the back cover part, and The above cover coupling part is a lamp inserted into the groove of the above fixing part.
9. In Paragraph 8, The above cover coupling portion has a plurality of third coupling protrusions, The above third connecting projection is a lamp that is coupled to the groove of the above fixing part.
10. In Paragraph 8, The above back cover portion includes a vent portion having a vent hole, and The above vent portion is a lamp that does not overlap in a vertical direction with the resin layer and the diffusion layer.