Lighting device and vehicular lamp

Abstract

A lighting device, disclosed in an embodiment of the invention, comprises: a bracket having a bottom part and a side wall part; a first lighting module and a second lighting module disposed on the bracket; a partition wall part disposed between the first lighting module and the second lighting module; and a diffusion sheet disposed on the first lighting module, the partition wall part, and the second lighting module to cover the first and second modules, wherein the first and second lighting modules may each have a length in a second direction greater than a width in a first direction, and the partition wall part may have a plurality of supporting protrusions and a plurality of recesses along a region facing the diffusion sheet.

Description

Lighting devices and vehicle lamps

[0001] An embodiment of the invention relates to a lighting device. An embodiment of the invention relates to a light unit or a vehicle lamp having a lighting device.

[0002] Light-emitting diodes (LEDs) offer advantages over conventional light sources, such as fluorescent and incandescent lamps, including low power consumption, a semi-permanent lifespan, fast response speed, safety, and environmental friendliness. These LEDs are applied in various lighting devices, such as display systems, interior lights, and exterior lights. Recently, lamps employing LEDs have been proposed as automotive lighting sources. Compared to incandescent lamps, LEDs are advantageous due to their lower power consumption. Furthermore, their small size allows for greater design freedom, and their semi-permanent lifespan provides economic benefits.

[0003] An embodiment of the invention may provide a lighting device having lighting modules spaced apart from each other and a diffusion sheet covering said lighting modules. An embodiment of the invention may provide a lighting device having a uniform light distribution by arranging a diffusion sheet covering a plurality of lighting modules arranged on both sides of a partition wall. An embodiment of the invention may provide a lighting device and a vehicle lamp with improved light uniformity on a bracket having a plurality of lighting modules.

[0004] A lighting device according to an embodiment of the invention comprises: a bracket having a bottom portion and a side wall portion; a plurality of lighting modules disposed on the bracket; a partition portion disposed between the plurality of lighting modules; and a diffusion sheet disposed on the plurality of lighting modules and the partition portion and covering the upper portion of the plurality of lighting modules, wherein each of the plurality of lighting modules has a length in a second direction longer than the width in a first direction, and the partition portion may have a plurality of support protrusions and a plurality of recesses along an area facing the diffusion sheet.

[0005] According to an embodiment of the invention, the length of at least one of the plurality of recesses in a second direction may be longer than the length of the support projection in a second direction. The depth of at least one of the plurality of recesses may be at least twice the thickness of the diffusion sheet. The upper surface of the support projection may have a convex curved surface. At least one of the plurality of recesses may have inclined surfaces or convex curved surfaces on both sides in a second direction. The bottom of at least one of the plurality of recesses may have inclined surfaces or convex curved surfaces. An adhesive may be included between the support projections and the diffusion sheet.

[0006] According to an embodiment of the invention, the plurality of lighting modules includes adjacent first and second lighting modules, the first lighting module includes a first substrate, a plurality of first light sources disposed on the first substrate, and a first resin layer covering the plurality of first light sources, and the second lighting module includes a second substrate, a plurality of second light sources disposed on the second substrate, and a second resin layer covering the plurality of second light sources, and the plurality of support protrusions may overlap with a straight line in a first direction connecting the first and second light sources.

[0007] According to an embodiment of the invention, the length of the recess may be longer than the pitch of the first and second light sources. The diffusion sheet may have a convex lens portion that overlaps in a vertical direction with the first and second light sources. The diffusion sheet may have a convex portion on the partition portion. The diffusion sheet may have a through hole corresponding to at least a portion of each of the support protrusions, and a portion of the plurality of support protrusions may be inserted into the through hole. The diffusion sheet may have a concave portion corresponding to at least a portion of each of the support protrusions, and a portion of the plurality of support protrusions may be disposed in the concave portion.

[0008] According to an embodiment of the invention, the support projection has a two-stage support structure, and the upper end of the two-stage support structure may be positioned on the lower surface of the diffusion sheet or at a position higher than the lower surface. The edge of the diffusion sheet is coupled to the upper end of the side wall of the bracket with a fastening member.

[0009] A lighting device according to an embodiment of the invention comprises: a bracket; a plurality of lighting modules disposed on the bracket and spaced apart in a first direction; a partition portion disposed between the first lighting module and the second lighting module; and a diffusion sheet disposed on the first lighting module and the second lighting module and covering the upper portions of the first and second modules, wherein each of the plurality of lighting modules has a length in the second direction longer than the width in the first direction, and the partition portion has a plurality of recesses facing the diffusion sheet, and the plurality of recesses can be penetrated in the first direction and arranged along the second direction.

[0010] According to an embodiment of the invention, the partition wall includes a support projection disposed between adjacent recesses, and at least one of the plurality of recesses may have a length different from the length in the second direction of the support projection. The depth of at least one of the plurality of recesses may be at least twice the thickness of the diffusion sheet. The upper surface of the support projection may have a convex curved surface. At least one of the plurality of recesses may have a slanted surface or a convex curved surface on both sides in the second direction, and at least one of the plurality of recesses may have a slanted surface or a convex curved surface on its bottom.

[0011] According to an embodiment of the invention, a plurality of storage spaces are provided by a partition within a bracket, a lighting module is placed in each of the plurality of storage spaces, and a diffusion sheet covering the plurality of lighting modules is placed. Accordingly, the uniformity of light on the plurality of lighting modules can be improved. In addition, a plurality of recesses are provided within the partition to prevent a decrease in the light intensity of the diffusion sheet on the partition.

[0012] A lighting device according to an embodiment of the invention can be provided as a lamp for a vehicle to maximize the lighting effect for a divided area. By improving the light uniformity of the lighting device having a divided area, the optical reliability of the lighting device is improved, and it can be applied to a light unit, various display devices, or a vehicle lamp having the same.

[0013] FIG. 1 is an exploded perspective view of a lighting device according to an embodiment of the invention.

[0014] FIG. 2 is a combined plan view of a lighting device according to an embodiment of the invention.

[0015] Figure 3 is a cross-sectional view of the lighting device of Figure 2 on the AA side.

[0016] Figure 4 is a cross-sectional view of the BB side of the lighting device of Figure 2.

[0017] Figure 5 is a cross-sectional view of the CC side of the lighting device of Figure 2.

[0018] Figure 6 is a partial enlarged view showing the recess of the bulkhead section of Figure 5.

[0019] Figure 7 is a drawing showing an example of adhesion between the partition wall and the diffusion sheet of Figure 5.

[0020] Figure 8 is a drawing illustrating the recess between the partition wall and the diffusion sheet of Figure 4.

[0021] Figure 9 is an example of a deformation of the upper part of the bulkhead section of Figure 4.

[0022] Figure 10 is an example of a modified support projection of the bulkhead portion of Figure 2.

[0023] Figure 11 is a modified example of the recess of Figure 6.

[0024] Fig. 12 is another example of the recess of Fig. 6.

[0025] Figure 13 is an example of a size variation of the recess of Figure 5.

[0026] Figure 14 is an example of a modified diffusion sheet of Figure 3.

[0027] FIG. 15 is a first modified example showing the combination of the support projection of the partition section of FIG. 4 and the diffusion sheet.

[0028] FIG. 16 is a second modified example showing the combination of the support projection of the partition section of FIG. 4 and the diffusion sheet.

[0029] FIG. 17 is a third modified example showing the combination of the support projection of the partition section of FIG. 4 and the diffusion sheet.

[0030] (A) of FIG. 18 is a diffusion sheet according to another example of the invention, and (B) is a fourth modified example showing the connection between the diffusion sheet of FIG. 18(A) and the support projection of the partition wall.

[0031] FIG. 19 is a fifth modified example showing the combination of the support projection of the partition section of FIG. 4 and the diffusion sheet.

[0032] FIG. 20 is a sixth modified example showing the combination of the support projection of the partition section of FIG. 4 and the diffusion sheet.

[0033] FIG. 21 is a first variation example of the lighting device of FIG. 3.

[0034] FIG. 22 is a second variation example of the lighting device of FIG. 3.

[0035] Fig. 23 is another example of the lighting device of Fig. 22.

[0036] Figure 24 is another example of the lighting device of the invention.

[0037] FIG. 25 is an example of a vehicle having the lighting device of the invention.

[0038] FIG. 26 is an enlarged view of the lighting device or lamp of the vehicle in FIG. 25.

[0039] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to some of the described embodiments but can be implemented in various different forms, and within the scope of the technical concept of the present invention, one or more of the components among the embodiments may be selectively combined or substituted. Furthermore, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a meaning generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms used generally, such as those defined in advance, may be interpreted by considering their meaning in the context of the relevant technology. Additionally, the terms used in the embodiments of the present invention are intended to describe the embodiments and are not intended to limit the present invention. In this specification, the singular form may include the plural form unless specifically stated otherwise in the text, and when described as "at least one of A and B and C (or more than one)," it may include one or more of all combinations that can be formed from A, B, and C. In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended merely to distinguish the component from other components and do not determine the essence, order, or sequence of the component. Furthermore, where it is stated that a component is 'connected,' 'combined,' or 'connected' to another component, this may include not only cases where the component is directly connected, combined, or connected to the other component, but also cases where it is 'connected,' 'combined,' or 'connected' due to another component located between the component and the other component.Furthermore, when described as being formed or placed "above or below" each component, "above" or "below" includes not only cases where two components are in direct contact with each other, but also cases where one or more other components are formed or placed between the two components. Additionally, when expressed as "above or below," it may include the meaning of a downward direction as well as an upward direction relative to a single component.

[0040]

[0041] Hereinafter, a lighting device will be described with reference to the attached drawings. FIG. 1 is an exploded perspective view of a lighting device according to an embodiment of the invention, FIG. 2 is a combined plan view of a lighting device according to an embodiment of the invention, FIG. 3 is a cross-sectional view of the lighting device of FIG. 2 on the AA side, FIG. 4 is a cross-sectional view of the lighting device of FIG. 2 on the BB side, FIG. 5 is a cross-sectional view of the lighting device of FIG. 2 on the CC side, FIG. 6 is a partial enlarged view showing a recess of the partition wall portion of FIG. 5, FIG. 7 is a drawing showing an example of adhesion between the partition wall portion of FIG. 5 and a diffusion sheet, and FIG. 8 is a drawing explaining the recess between the partition wall portion and the diffusion sheet of FIG. 4.

[0042] Referring to FIGS. 1 through 8, a lighting device according to an embodiment of the invention may include a plurality of lighting modules (110, 120), a bracket (400) having the plurality of lighting modules (110, 120) inside, a partition (450) disposed between the plurality of lighting modules (110, 120), and a diffusion sheet (500) disposed on the bracket (400). The partition (450) may be provided as a single unit, or as another example, a plurality of partitions may be provided parallel to each other or arranged to intersect each other. The diffusion sheet (500) may be an optical sheet capable of affecting optical properties. As another example, a prism sheet may be further disposed on the diffusion sheet (500). The plurality of lighting modules (110, 120) may be spaced apart in a first direction (X).

[0043] The bracket (400) includes a bottom portion (410) and a side wall portion (420). The partition portion (450) may protrude from the bottom portion (410) of the bracket (400) and be connected to the inside of the side wall portion (420). That is, the partition portion (450) may be formed integrally with the bracket (400). As another example, the partition portion (450) may be attached to the bottom portion (410) of the bracket (400) as a separate structure. The bracket (400) may be formed of resin or plastic material. The material of the bracket (400) may be formed of a light-reflective material or an opaque material. The above bracket (400) may include at least one of, for example, PC (Polycarbonate), PETG (Polyethylene Terephthalate Glycol), PE (polyethylene), PSP (Polystyrene Paper), PP (polypropylene), and PVC (polyvinyl chloride). The inner surface of the above bracket (400) may be coated with a reflective material.

[0044] The bottom portion (410) is positioned on the lower surface of the plurality of lighting modules (110, 120) and can support the plurality of lighting modules (110, 120). A power cable for supplying power to the plurality of lighting modules (110, 120) may pass through the bottom portion (410) or the side wall portion (420). The side wall portion (420) may be positioned around the upper surface of the bottom portion (410). The side wall portion (420) may be positioned on both sides of the first direction (X) and both sides of the second direction (Y) around the bottom portion (410).

[0045] The bracket (400) may have a plurality of storage spaces (401, 402) inside. The lighting module (110, 120) may be stored in the plurality of storage spaces (401, 402) and may come into contact with the bottom of each storage space (401, 402). The plurality of storage spaces (401, 402) may be equal to the number of lighting modules (110, 120). The bottom surface area of ​​each of the plurality of storage spaces (401, 402) may be larger than the bottom surface area of ​​each lighting module (110, 120). The bottom of the storage space (401, 402) on which the lighting module (110, 120) is seated may be the upper surface of the bottom portion (410), and the lighting module (110, 120) may be bonded or fastened to be fixed on the bottom portion (410).

[0046] Additionally, the bottom portion (410) may have heat dissipation fins (not shown) in the area where each of the lighting modules (110, 120) is seated to improve the heat dissipation efficiency of the lighting modules (110, 120) inside. As another example, a heat sink (not shown) is attached to the lower surface of the bottom portion (410), and the heat sink can dissipate heat generated from the lighting modules (110, 120). As another example, a heat sink (not shown) may be placed between the lighting modules (110, 120) and the bottom portion (410). Accordingly, a lighting device equipped with a heat dissipation member (heat sink or heat dissipation fin) can prevent a decrease in the optical reliability of the lighting modules (110, 120).

[0047]

[0048] The lighting modules (110, 120) have a shape in which the length in the second direction (Y) is longer than the width in the first direction (X), and may be extended in a straight line or a curved shape in the second direction (Y). At least some of the plurality of lighting modules (110, 120) may be arranged parallel to each other. The upper surface areas of the plurality of lighting modules (110, 120) may be the same or different from each other. The plurality of lighting modules (110, 120) may each be placed in an area divided by the partition wall (450). The plurality of lighting modules (110, 120) may be placed in an area or storage space (401, 402) divided in the first direction (X) by the partition wall (450). As another example, the plurality of lighting modules (110, 120) may be placed in an area or storage space divided in the second direction (Y) by the partition wall (450). As another example, the plurality of lighting modules (110, 120) may be placed in an area or storage space divided into first and second directions (X, Y) by the partition (450). In this case, the partition (450) may have a partition structure that is orthogonal or intersecting to one another.

[0049] Each of the plurality of lighting modules (110, 120) can emit surface light. The plurality of lighting modules (110, 120) may emit light of the same color or light of different colors. When the plurality of lighting modules (110, 120) emit the same color, the lighting modules (110, 120) may be red, yellow, or white. When the plurality of lighting modules (110, 120) emit different colors, the lighting modules (110, 120) may selectively emit light from red and white, red and yellow, or yellow and white. The plurality of lighting modules (110, 120) include first and second lighting modules (110, 120) spaced apart in a first direction (X), and each of the first and second lighting modules (110, 120) may include a substrate (112, 122), a plurality of light sources (111, 121), and a resin layer (113, 123). Each of the first and second lighting modules (110, 120) may include a light-transmitting layer (114, 124) on the resin layer (113, 123).

[0050] The number of light sources of the plurality of lighting modules (110, 120) may be the same or different from one another. The surface area of ​​the plurality of lighting modules (110, 120) may be the same or different from one another. If the number of light sources or surface areas of the plurality of lighting modules (110, 120) are different, the optical area covered by each lighting module (110, 120) may differ. For example, the first lighting module (110) may cover a smaller optical area than the second lighting module (120).

[0051] The substrate (112, 122) may include a printed circuit board (PCB). The substrate (112, 122) 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 (112, 122) is a flexible PCB, the lighting device may have flexible characteristics. The substrate (112, 122) may be electrically connected to the plurality of light sources (111, 121). The substrate (112, 122) may be a single-layer substrate having a single wiring layer or a multi-layer substrate having a plurality of wiring layers. The above substrates (112, 122) can be defined as a first substrate (112) disposed within a first lighting module (110) and a second substrate (122) disposed within a second lighting module (120).

[0052] The plurality of light sources (111, 121) are disposed on the substrate (112, 122) and may be electrically connected to the substrate (112, 122). The plurality of light sources (111, 121) may include a plurality of first light sources (111) disposed on the first substrate (112) and a plurality of second light sources (121) on the second substrate (122). The light sources (111, 121) may emit light toward the diffusion sheet (500) through the resin layer (113, 123). The light sources (111, 121) may emit light having the highest intensity in the third direction (Z). One or more of the plurality of light sources (111, 121) may be disposed in the first direction (X), and a plurality may be arranged in the second direction (Y). For example, multiple light sources (111, 121) can be arranged in n rows (n is an integer greater than or equal to 1) and m columns (m is an integer greater than or equal to 2).

[0053] The light source (111, 121) is a light-emitting device having a light-emitting diode chip (LED Chip), and may include various forms such as a package in which the light-emitting diode chip is packaged, a flip-chip, or a CSP (Chip scale package). The light-emitting diode chip may emit at least one of blue, red, green, ultraviolet (UV), or infrared light. The light source (111, 121) may emit at least one of white, blue, red, green, or infrared light. The light source (111, 121) may emit light in a colored light, such as white, blue, or green. A phosphor layer may be coated on the surface of the light source (111, 121). The light-emitting device of the light source (111, 121) includes a mini LED chip or a micro LED chip. The first and second light sources (111, 121) may emit light of the same color or light of different colors. The pitch of each of the first and second light sources (111, 121) is 5 mm or more, and can be arranged, for example, in a range of 5 mm to 20 mm or in a range of 5 mm to 15 mm. The pitch of each of the first and second light sources (111, 121) can be greater than the thickness of the lighting module (110, 120), so that the number of light sources (111, 121) mounted can be reduced.

[0054]

[0055] The resin layer (113, 123) may be a layer made of a transparent resin material. The resin layer (113, 123) may seal the light sources (111, 121). The resin layer (113, 123) may include a first resin layer (113) of the first lighting module (110) and a second resin layer (123) of the second lighting module (120). The first resin layer (113) may be placed on the first substrate (112) and may cover the plurality of first light sources (111). The first resin layer (113) may be in contact with the surface of the plurality of first light sources (111). The first resin layer (113) may be in contact with a part or the entire upper surface of the first substrate (112). For example, if a first reflective layer (not shown) is disposed between the first substrate (112) and the first resin layer (113), the first resin layer (113) may come into contact with the first reflective layer, and the first light sources (111) may protrude through the first reflective layer. The second resin layer (123) may be disposed on the second substrate (122) and may cover the plurality of second light sources (121). The second resin layer (123) may come into contact with the surface of the plurality of second light sources (121). The second resin layer (123) may come into contact with a part or the entire upper surface of the second substrate (122). For example, if a second reflective layer (not shown) is disposed between the second substrate (122) and the second resin layer (123), the second resin layer (123) may come into contact with the second reflective layer, and the second light sources (121) may protrude through the second reflective layer.

[0056]

[0057] The lower surface area of ​​the resin layer (113, 123) may be equal to or smaller than the upper surface area of ​​the substrate (112, 122). The resin layer (113, 123) 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 (113, 123) may be silicone or PMMA. Alternatively, the resin layer (113, 123) may use a resin material with urethane acrylate oligomer as the main raw material. The resin layer (113, 123) may be a layer without a diffusion agent inside, or a layer without particulate impurities that may affect optical properties. As another example, the resin layer (113, 123) may contain a diffusion agent inside, and the diffusion agent may include at least one of Al2O3, TiO2, SiO2, ZnO, and ZrO2.

[0058]

[0059] The light-transmitting layer (114, 124) is an upper layer of the first and second lighting modules (110, 120) and may contain at least one of a diffuser, a phosphor, and ink particles. The light-transmitting layer (114, 124) may be arranged as a single layer or a multilayer. The light-transmitting layer (114, 124) may be a diffusion layer having a diffuser and / or a light-blocking layer, a phosphor layer having a phosphor, or a layer having ink particles. The diffusion layer may be placed over the entire upper surface of the first and second resin layers (113, 123) to improve light uniformity. The light-blocking layer may include a light-blocking pattern placed on an area that overlaps perpendicularly with each of the light sources (111, 121). The light-transmitting layer (114, 124) may be laminated in a layer structure having a light-blocking layer having a light-blocking pattern and a diffusion layer on the light-blocking layer. The light-blocking pattern can be placed in different regions between the diffusion layer and the resin layer, respectively.

[0060] The light-transmitting layers (114, 124) may include a first light-transmitting layer (114) disposed on the first resin layer (113) and a second light-transmitting layer (124) disposed on the second resin layer (123). The first and second light-transmitting layers (114, 124) may convert the wavelength of light generated from the light source (111, 121) on the first and second resin layers (113, 123) and emit it as target light. At this time, the first and second light-transmitting layers (114, 124) may have the same phosphor or different phosphors. As another example, the first and second light-transmitting layers (114, 124) may have a pattern that blocks light to have a uniform distribution of the intensity of light generated from the light source (111, 121) on the first and second resin layers (113, 123).

[0061] The lighting module (110, 120) can emit uniform surface light. The thickness of the lighting module (110, 120) may be 5 mm or less, for example, in the range of 1.5 mm to 5 mm or in the range of 1.8 mm to 3 mm. The lighting module (110, 120) may be provided as a flexible module with a thin thickness, and if the bottom of the storage space (401, 402) has a curved surface, it may be placed along the curved surface of the bottom of the storage space (401, 402).

[0062]

[0063] The first lighting module (110) is placed on the bottom of the first storage space (401) of the bracket (400), and the second lighting module (120) is placed on the bottom of the second storage space (402) of the bracket (400). The diffusion sheet (500) can cover the upper surface of the bracket (400). The diffusion sheet (500) can cover the storage spaces (401, 402) of the bracket (400). That is, the lower surface area of ​​the diffusion sheet (500) can be larger than the sum of the upper surface areas of the storage spaces (401, 402). The diffusion sheet (500) can diffuse light incident through different storage spaces (401, 402) and emit light of a uniform distribution.

[0064] The above diffusion sheet (500) may be formed from a resin material having a diffusion agent. The resin material may include a transparent material such as silicone or epoxy. The diffusion sheet (500) may be manufactured into a diffusion sheet having a predetermined thickness by injecting a resin liquid having a diffusion agent into a mold (not shown) and then heat-curing it. As another example, the diffusion sheet (500) may include at least one of polymethyl methacrylate (PMMA), polypropylene (PP), polyethylene (PE), and polystyrene (PS). The diffusion sheet (500) may include a plurality of layers, for example, a diffusion film and a diffusion plate disposed on the diffusion film. The diffusion sheet (500) may include a transparent film and a diffusion plate on the transparent film. The diffusion sheet (500) may include a first polarizing film and a second polarizing film or / and a diffusion plate on the first polarizing film. The above diffusion film may include at least one of PET (polyethylene terephthalate), PS, or PC. The above diffusion plate may include at least one of PC, PS, or PMMA. The above diffusion film diffuses incident light, and the above diffusion plate has a thickness greater than the thickness of the above diffusion film and diffuses the light that has passed through the above diffusion film, and prevents sagging.

[0065] The above-mentioned diffusion sheet (500) has an inner surface and an outer surface, and the roughness of the inner surface may be smaller than that of the outer surface. The roughness of the inner surface is lower than that of the outer surface, which can increase the incidence efficiency, and the roughness of the outer surface can improve the diffusion efficiency of the transmitted light. That is, the diffusion sheet (500) can be formed by thermoforming to provide different roughnesses for the inner surface and the outer surface.

[0066]

[0067] The thickness (T1) of the diffusion sheet (500) may be 0.5 mm or less, for example, in the range of 0.1 mm to 0.5 mm or in the range of 0.15 mm to 0.3 mm. The diffusion sheet (500) may be provided as a flexible sheet due to its thin thickness. Since the diffusion sheet (500) is provided as a flexible sheet, the partition (450) is placed between the first and second storage spaces (401, 402) and supports the diffusion sheet (500). The diffusion sheet (500) may be spaced 15 mm or more from the bottom of the bracket (400), for example, in the range of 15 mm to 50 mm or in the range of 15 mm to 30 mm. Accordingly, the first and second storage spaces (401, 402) can secure a light guiding distance for light generated on the first and second lighting modules (110, 120) due to the vertical distance between the diffusion sheet (500) and the bracket (400). A portion of the diffusion sheet (500) may be attached to the partition (450) with an adhesive.

[0068]

[0069] The above partition (450) may protrude from the bottom of the bracket (400) toward the lower surface of the diffusion sheet (500). The above partition (450) may be formed integrally with the bracket (400) or may be separately connected. The above partition (450) may physically separate the first and second storage spaces (401, 402). Accordingly, each lighting module (110, 120) may emit uniform surface light through each of the first storage space (401) and the second storage space (402).

[0070] The cross-sectional shape in the first direction (X) of the above partition (450) may be provided as a square shape in which the upper width and lower width are equal, or as a trapezoidal shape in which the upper width is narrower than the lower width. Both sides of the above partition (450) may have inclined sides and may reflect light emitted from the lighting modules (110, 120). The above partition (450) may support the diffusion sheet (500). The upper width of the above partition (450) may be 2mm or more, for example, in the range of 2mm to 20mm or in the range of 2mm to 15mm. If the width of the above partition (450) is smaller than the above range, the rigidity of the end of the above partition (450) may be reduced, and if it is larger than the above range, the improvement in strength and support force may be minimal.

[0071]

[0072] As shown in FIGS. 5 and 6, the upper portion of the partition (450) may have a plurality of recesses (452). The plurality of recesses (452) may each be placed between the support protrusions (451) of the partition (450). The plurality of recesses (452) may be arranged in a second direction (Y). The support protrusions (451) may each be placed between adjacent recesses (452). The recesses (452) and the support protrusions (451) may be arranged alternately. The recesses (452) are areas through which light emitted from either or both of the first storage space (401) and the second storage space (402) can be transmitted. The recesses (452) may reduce the area where a dark area occurs within the diffusion sheet (500) on the partition (450). The upper end of the above partition (450) is a portion adjacent to the discharge side or a portion adjacent to the diffusion sheet (500). At least one of the plurality of recesses (452) may have both sides of the first direction (X) open. That is, the plurality of recesses (452) may be penetrated in the first direction (X). Support protrusions (451) may be disposed on one side or both sides of the second direction (Y) of the plurality of recesses (452).

[0073] The depths (T2) of the plurality of recesses (452) may be the same or different from each other. For example, at least one of the plurality of recesses (452) may have a different depth. The depth (T2) of the recess (452) may be greater than the thickness (T1) of the diffusion sheet (500), for example, more than twice the thickness (T1) of the diffusion sheet (500). The depth (T2) of the recess (452) is the depth from the upper surface of the partition (450) to the bottom of the recess (452), and may be greater than 2mm, for example, in the range of 2mm to 10mm or in the range of 2mm to 5mm. If the depth (T2) of the recess (452) is smaller than the above range, a dark area may occur, and if it is larger than the above range, the improvement of the dark area may be minimal.

[0074] The lengths (D1) of the plurality of recesses (452) may be the same or different from each other. For example, at least one of the plurality of recesses (452) may have a different length. The length is a length in the second direction (Y). The length (D1) of the recess (452) may be different from the depth (T2) of the recess (452) as a length in the second direction (Y). The length (D1) of the recess (452) may be greater than the depth (T2) of the recess (452) as a length in the second direction (Y). As another example, the maximum length among the lengths of the plurality of recesses (452) may be greater than the maximum depth among the depths of the plurality of recesses (452). The length (D1) of the recess (452) may be different from the length (D2) of the support projection (451) between adjacent recesses (452). The length (D1) of the recess (452) may be greater than the length (D2) of the support projection (451) between adjacent recesses (452). Here, the upper surface area of ​​the recess (452) may differ from the upper surface area of ​​the support projection (451). When viewed from the upper surface of the partition (450), the upper surface area of ​​the recess (452) may be greater than the upper surface area of ​​the support projection (451). Here, the spacing between adjacent support projections (451) may be 10 mm or more, for example, in the range of 10 mm to 50 mm or in the range of 20 mm to 40 mm. Accordingly, the length (D1) of the recess (452) can be secured to a length of at least 10 mm. Therefore, the occurrence of a dark area on the partition (450) can be reduced.

[0075] In the above partition section (450), the length (D3) of the outer support projection (451) connected to the side wall section (420) of the bracket (400) may be equal to or smaller than the length (D2) of the inner support projection (451). Accordingly, the occurrence of a dark area in the space between the partition section (450) and the side wall section (420) can be suppressed. The outer side of the support projection (451) is an area closer to the side wall section (420) than the inner side.

[0076]

[0077] As shown in FIGS. 2 and 5, when the light sources (111, 121) of the first and second lighting modules (110, 120) are aligned on a straight line (X1) in the first direction (X), the straight line (X1) may overlap with the support protrusions (451) and may not overlap with the recesses (452). Here, the straight line (X1) may be the AA line of FIG. 2. Accordingly, light emitted from the first and second light sources (111, 121) arranged in the second direction (Y) of the first and second lighting modules (110, 120) may be incident on the recesses (452).

[0078] The upper surface of the bracket (400) has a stepped portion (405), and the edge of the diffusion sheet (500) can be placed on the stepped portion (405). The edge of the diffusion sheet (500) placed on the stepped portion (405) can be fastened by a fastening member (not shown). The fastening member may include a screw or a hook, and the screw may be fastened to the stepped portion (405) through a fastening hole of the diffusion sheet (500), and the hook may be coupled to the edge of the diffusion sheet (500) or the fastening hole of the hook structure of the stepped portion (405). Accordingly, the edge of the diffusion sheet (500) can be fixed on the bracket (400). As another example, the diffusion sheet (500) may be adhered to the stepped portion (405).

[0079]

[0080] As shown in FIG. 7, the diffusion sheet (500) and the support projection (451) of the partition (450) can be bonded with an adhesive (550). The adhesive (550) can fix the diffusion sheet (500) to the upper surface of the support projection (451). A portion of the adhesive (550) may be exposed to the recess (452) or protrude into the recess (452). The adhesive (550) may be made of transparent silicone or epoxy material.

[0081] As shown in FIG. 8, the recess (452) connects the first and second storage spaces (401, 402) and allows light within the first and second storage spaces (401, 402) to enter. Accordingly, the dark portion of the diffusion sheet (500) on the recess (452) can be removed. The lower surface of the recess (452) may be a flat surface facing the upper surface of the diffusion sheet (500).

[0082] As shown in FIG. 9 and FIG. 6, the lower surface of the recess (452) may have an inclined surface or a curved surface (R1). The inclined surface or curved surface (R1) may reflect light incident on the first and second storage spaces (401, 402) toward the diffusion sheet (500). Accordingly, the occurrence of dark areas on the diffusion sheet (500) on the recess (452) and the support projection (451) adjacent to the recess (452) may be reduced.

[0083] As shown in FIGS. 10 and FIGS. 6, both sides of the support projection (451) face the recess (452) and may be a convex curved surface (R2) or an inclined surface. The convex curved surface (R2) or the inclined surface can improve the incidence efficiency of light present in the first and second storage spaces (401, 402) into the recess (452).

[0084] As shown in FIG. 11 and FIG. 6, both sides of the recess (452) may be inclined surfaces (S2) or curved surfaces. Both sides of the recess (452) may be inclined surfaces (S2) with respect to the bottom of the recess (452) or concave or convex curved surfaces. The angle of inclination of the inclined surface (S2) with respect to the bottom of the recess (452) may be 60 degrees or less, for example, in the range of 30 to 60 degrees.

[0085] As shown in FIGS. 12 and 6, the outermost recess (452) can be connected to the side wall portion (420) of the bracket (400). Accordingly, light reflected from the inner surface (S4) of the side wall portion (420) of the bracket (400) can be incident on the outermost recess (452), and the occurrence of dark areas in the outer region of the diffusion sheet (500) placed on the outermost recess (452) can be reduced.

[0086] As shown in FIG. 13, the inner recess (452A) along the straight line (X1) extending in the first direction (X) may overlap with the first and second light sources (111, 121) of the first and second lighting modules (110, 120). Additionally, the length of the inner recess (452A) may be greater than the pitch of each of the first and second light sources (111, 121). Accordingly, the occurrence of dark areas on the diffusion sheet (500) on the inner recess (452A) can be suppressed.

[0087] As shown in FIGS. 14 and 6, the partition portion (450) is provided with a recess (452) and a support projection (451), and the diffusion sheet (500) may be provided with a convex portion (510) on an area that overlaps vertically with the partition portion (450). The convex portion (510) may be extended in a long length in the second direction (Y). As another example, the convex portion (510) may be placed on an area corresponding to each of the support projections (451). As another example, the convex portion (510) may be placed on an area corresponding to each of the recesses (452). The upper end of the partition portion (450) may be placed higher than the lower end of the diffusion sheet (500) so that light reflected by both sides of the partition portion (450) within the convex portion (510) can be incident into the interior of the convex portion (510). Accordingly, the occurrence of dark areas on the convex portion (510) can be reduced.

[0088]

[0089] As shown in FIG. 15 and FIG. 2, the support projection (451) of the partition (450) may have a convex curved surface (R3). The support projection (451) may have a hemispherical shape. That is, the support projection (451) has a convex curved surface on the surface facing the recess (452) and the surface facing the first and second storage spaces (401, 402), and can reflect incident light toward the recess (452) or the diffusion sheet (500). Thus, the occurrence of dark areas on the diffusion sheet (500) on the partition (450) can be reduced.

[0090] As shown in FIG. 16 and FIG. 2, the support projection (451) of the partition (450) may have a convex curved surface (R3). The support projection (451) may have a hemispherical shape. That is, the support projection (451) may have a convex curved surface on the surface facing the recess (452) and the surface facing the first and second storage spaces (401, 402), and may reflect incident light toward the recess (452) or the diffusion sheet (500). The diffusion sheet (500) may have concave portions (C1) into which the support projection (451) is inserted. A portion of the upper end of the support projection (451) may be inserted into the concave portion (C1). The concave portion (C1) may be a concave curved surface. Therefore, the occurrence of dark areas of the diffusion sheet (500) on the partition wall (450) can be reduced.

[0091]

[0092] As shown in FIG. 17 and FIG. 2, the support projection (451B) of the partition (450) may protrude into the diffusion sheet (500). The diffusion sheet (500) has a through hole (C2) inside, into which each of the support projections (451B) may be inserted. The support projection (451B) may have a square shape or a hemispherical shape. At this time, the lower surface of the diffusion sheet (500) is positioned lower than the upper surface of the support projection (451B) and may be in close contact with the recess (452B). An adhesive may be further placed between the support projection (451B) and the diffusion sheet (500), and between the upper surface of the recess (452B) and the diffusion sheet (500). The occurrence of a dark area of ​​the diffusion sheet (500) on the partition (450) may be suppressed.

[0093] As shown in FIG. 18 and FIG. 2, the support projection (451C) of the partition (450) may protrude into the diffusion sheet (500). The diffusion sheet (500) has a through hole (C3) inside, into which each of the support projections (451C) may be inserted. The support projection (451C) or the through hole (C3) may have a trapezoidal shape. The support projection (451C) and the through hole (C3) may have a shape in which the upper surface area is smaller than the lower surface area. The lower surface of the diffusion sheet (500) is positioned lower than the top of the support projection (451C) and may be spaced apart from the bottom of the recess (452). An adhesive may be further disposed between the support projection (451C) and the diffusion sheet (500), and between the upper surface of the recess (452) and the diffusion sheet (500). The gap between the upper surface of the recess (452) and the diffusion sheet (500) may be at least 1 mm. The occurrence of dark areas of the diffusion sheet (500) on the partition (450) may be suppressed.

[0094]

[0095] As shown in FIG. 19 and FIG. 2, the support projection (451) of the partition (450) may have a two-stage support structure, and the upper portion (451) may be inserted into each of the through holes (C2) of the diffusion sheet (500). The recess (452) may be placed between the two-stage support structures of the support projection (451) and may allow incident light to pass through. The upper portion (451D) of the support projection (451) may be placed with an area or length smaller than the area or length of the lower support projection. The diffusion sheet (500) may be in close contact with the support projection (451). Here, the length of the recess (452) may be 10 mm or more, for example, in the range of 10 mm to 40 mm.

[0096] As shown in FIG. 20 and FIG. 2, the support projection (451) of the partition (450) may have a two-stage support structure, and the upper portion (451D) may support the diffusion sheet (500). The recess (452) is positioned between the two-stage support structures of the support projection (451) and may allow incident light to pass through. Since the support projection (451) is spaced apart from the diffusion sheet (500), the area of ​​the recess (452) may be increased. Accordingly, the occurrence of dark areas on the diffusion sheet (500) on the partition (450) may be reduced.

[0097] As shown in FIG. 21 and FIG. 2, the partition (450) has a support projection (451) and a recess (452), and the diffusion sheet (500) may be provided as a sheet with a convex curved shape. The apex position of the diffusion sheet (500) may be located on the partition (450). Accordingly, the upper end of the partition (450) may be positioned higher than the upper end of the side wall (420) of the bracket (400). Accordingly, light from the first and second storage spaces (401, 402) may be guided onto the partition (450), and the occurrence of dark areas on the diffusion sheet (500) on the partition (450) may be reduced. The edge portion (505) of the diffusion sheet (500) may be fastened by a fastening member at the upper end of the side wall (420).

[0098] As shown in FIG. 22 and FIG. 2, the diffusion sheet (500) may be provided with a plurality of lens portions (520). The plurality of lens portions (520) may be arranged in an area that overlaps vertically with each of the first and second light sources (111, 121) of the first and second lighting modules (110, 120). The plurality of lens portions (520) may protrude from the upper surface of the diffusion sheet (500).

[0099] The plurality of lens portions (520) may be formed in a dot shape or have a bar shape that is long in the second direction (Y). The plurality of lens portions (520) may have a light blocking portion (521) with a flat top and may have a plurality of convex patterns (522) around the periphery. The light blocking portion (521) is a structure for preventing hot spots and may be 80% or more of the upper surface area of ​​each light source (111, 121), for example, in the range of 80% to 120%. Accordingly, hot spots on the lens portion (520) can be prevented. The pattern (522) may have a dot shape or a ring shape on the surface of the lens portion (520) and may refract incident light.

[0100] As shown in FIG. 23 and FIG. 2, the diffusion sheet (500) may be provided with a plurality of lens portions (520A). The plurality of lens portions (520A) may be placed in an area that overlaps perpendicularly with each of the first and second light sources (111, 121) of the first and second lighting modules (110, 120). The plurality of lens portions (520A) may protrude toward the light sources (111, 121) from the lower surface of the diffusion sheet (500). The plurality of lens portions (520A) may be formed in a dot shape or have a bar shape that is long in the second direction (Y). The plurality of lens portions (520A) may have a light blocking portion (521) with a flat top and a plurality of convex patterns (522) around the periphery. The light blocking portion (521) is a structure for preventing hot spots and may be at least 80% of the upper surface area of ​​each light source (111, 121), for example, in the range of 80% to 120%. Accordingly, hot spots on the lens portion (520A) can be prevented. The pattern (522) may have a dot shape or a ring shape on the surface of the lens portion (520A) and may refract incident light. The recess (452) of the partition portion (450) may be placed between adjacent lens portions (520A). The recess (452) of the partition portion (450) may overlap with adjacent lens portions (520A) in a horizontal direction.

[0101] In FIGS. 22 and 23, the density of the diffuser in the diffusion sheet (500) may be lower than the density of the diffuser added in the lens portion (520, 520A). The density of the diffuser added in the lens portion (520, 520A) may be at least 1.5 times the density of the diffuser in the diffusion sheet (500), for example, in the range of 1.5 to 2 times. Accordingly, hot spots on the lens portion (520, 520A) can be removed.

[0102]

[0103] As shown in FIG. 24, the bracket (400) has a structure that does not have a side wall. The bracket (400) of the lighting device is positioned at the bottom of the lighting module (110, 120), and the partition (460) may be formed integrally with the bracket (400) or fixed separately. Below the side (502, 503) of the diffusion sheet (500), if the diffusion sheet (500) is long in the longitudinal direction, an intermediate side wall may be provided. The diffusion sheet (500) has an upper portion (501) and side portions (502, 503), and the side portions (502, 503) may be folded from the upper portion (501) toward the outside of the lighting module (110, 120). The above side portions (502, 503) may be positioned at an angle (R0) of 50 degrees or more, for example, in the range of 50 to 70 degrees, relative to the upper surface of the bracket (400). Accordingly, the diffusion sheet (500) can emit light with a uniform light distribution across the entire area. The above partition portion (460) may have the support protrusions and recesses disclosed above. The edge portion (505) of the diffusion sheet (500) may be positioned on the bracket (400) and may be positioned lower than the upper surface of the lighting module (110, 120).

[0104]

[0105] A lighting device according to an embodiment of the invention may enclose an area excluding the lighting area with a bracket. The bracket may be placed around the lower, side wall, and upper perimeter of the lighting device. The lighting device may emit light emitted from the lighting module (110, 120) in a specific direction. The lighting device can be applied to various lamp devices requiring lighting, such as vehicle lamps, household lighting devices, and industrial lighting devices. For example, in the case of a lighting module applied to a vehicle lamp, it can be applied to a headlamp, parking light, side mirror light, fog light, tail lamp, turn signal lamp, back up lamp, stop lamp, daytime running right, vehicle interior lighting, door scarf, rear combination lamp, backup lamp, etc.

[0106] FIG. 25 is a plan view of a vehicle with a vehicle lamp having a lighting device according to an embodiment, and FIG. 26 is a drawing showing an example of a taillight of a vehicle having a lighting device disclosed in an embodiment. Referring to FIG. 25 and FIG. 26, the front lamp (2100) and the rear lamp (2200) of a moving body or vehicle (2000) may include one or more lighting devices, and by individually controlling the driving timing of these lighting devices, they may provide not only the function of a normal headlight but also additional functions such as a welcome light or a celebration effect when the driver opens the vehicle door. The lamps may be applied as daytime running lights, high beams, low beams, fog lights, or turn signals.

[0107] In a vehicle (2000), the taillight (800) may have a plurality of lamp units (810, 812, 814, 816, 818) supported by a housing. For example, the lamp units (810, 812, 814, 816, 818) may include a first lamp unit (810) disposed on one side, a second lamp unit (812) disposed around the outer perimeter of the first lamp unit (810), and third to fifth lamp units (814, 816, 818) each disposed inside the second lamp unit (812). The taillight (800) may include a lighting device disclosed in an embodiment disposed inside the third, fourth, and fifth lamp units (814, 816, 818), and the lighting device may function as a composite hidden lamp that improves lighting and surface image. The first to fifth lamp units (810, 812, 814, 816, 818) may optionally apply the lighting device disclosed in the embodiment, and a red lens cover or a white lens cover may be disposed on the outside of the lighting device to improve the lighting characteristics of the lamp units (810, 812, 814, 816, 818). The lighting device disclosed in the embodiment applied to the lamp units (810, 812, 814, 816, 818) can irradiate surface light with a higher light intensity in a specific direction.

[0108] The first and second lamp units (810, 812) may be provided with at least one of a curved shape, a straight shape, an angular shape, an inclined shape, or a planar shape, or a structure mixed thereof. The first and second lamp units (810, 812) may be arranged in one or multiple units in each taillight. The first lamp unit (810) may be provided as a taillight, the second lamp unit (812) may be provided as a brake light, the third lamp unit (814) may be provided as a reverse light, and the fourth and fifth lamp units (816, 818) may be provided as turn signal lamps. The taillight (800) may provide at least one function among a side marker light, a brake light, and a turn signal light using the lighting device disclosed in the embodiment of the invention.

[0109]

[0110] The features, structures, effects, etc. described in the embodiments above 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. exemplified in each embodiment may be combined or modified and implemented in other embodiments by those skilled in the art to which the embodiments belong. Therefore, details regarding such combinations and modifications should be interpreted as being included within the scope of the present invention. In addition, although the above description has focused on embodiments, this is merely illustrative and does not limit the present invention; those skilled in the art to which the present invention belongs will understand that various modifications and applications not exemplified above are possible within the scope that does not deviate from the essential characteristics of the embodiments. For example, 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 present invention as defined in the appended claims.

Claims

1. A bracket having a bottom portion and a side wall portion; A plurality of lighting modules disposed on the above bracket; A partition section disposed between the plurality of lighting modules above; and It includes the plurality of lighting modules and a diffusion sheet disposed on the partition wall and covering the upper portion of the plurality of lighting modules, Each of the above plurality of lighting modules has a length in a second direction orthogonal to the first direction that is longer than the width in the first direction, and A lighting device having a plurality of support protrusions and a plurality of recesses along the area facing the diffusion sheet, the above partition section.

2. In Paragraph 1, A lighting device in which the length of at least one of the plurality of recesses in a second direction is longer than the length of the second direction of the support projection.

3. In Paragraph 2, A lighting device in which the depth of at least one of the plurality of recesses is at least twice the thickness of the diffusion sheet.

4. In any one of paragraphs 1 through 3, A lighting device having an upper surface of the support projection having a convex curved surface.

5. In any one of paragraphs 1 through 3, A lighting device in which both sides of the second direction of the plurality of recesses have inclined surfaces or convex curved surfaces.

6. In any one of paragraphs 1 through 3, A lighting device in which the bottom of each of the above plurality of recesses has an inclined surface or a convex curved surface.

7. In any one of paragraphs 1 through 3, A lighting device comprising an adhesive disposed between the support protrusions and the diffusion sheet.

8. In any one of paragraphs 1 through 3, The plurality of lighting modules above include adjacent first and second lighting modules, and The first lighting module comprises a first substrate, a plurality of first light sources disposed on the first substrate, and a first resin layer covering the plurality of first light sources. The second lighting module comprises a second substrate, a plurality of second light sources disposed on the second substrate, and a second resin layer covering the plurality of second light sources. The above plurality of support protrusions are a lighting device that overlaps with a straight line in the first direction connecting the first and second light sources.

9. In Paragraph 8, The length of at least one of the plurality of recesses in the first direction is longer than the pitch between the first and second light sources, and The above-mentioned diffusion sheet is a lighting device having a convex lens portion that overlaps in a vertical direction with the first and second light sources.

10. In any one of paragraphs 1 through 3, The above diffusion sheet is a lighting device having a convex portion on the above partition.

11. In any one of paragraphs 1 to 3, The above diffusion sheet has a through hole corresponding to at least a portion of each of the support protrusions, and A lighting device in which a portion of the above plurality of support protrusions is inserted into the above through hole.

12. In any one of paragraphs 1 through 3, The above diffusion sheet has a concave portion corresponding to at least a portion of each of the support protrusions, and A lighting device in which a portion of the above plurality of support protrusions is disposed in the above concave portion.

13. In any one of paragraphs 1 through 3, Each of the above support protrusions has a two-stage support structure, and the upper end of the two-stage support structure is positioned at the lower surface of the diffusion sheet or at a position higher than the lower surface, and A lighting device in which the edge of the above-mentioned diffusion sheet is connected to the upper side wall portion of the above-mentioned bracket by a fastening member.

14. Bracket; A plurality of lighting modules disposed on the above bracket and spaced apart in a first direction; A partition section disposed between the plurality of lighting modules above; and It includes a diffusion sheet disposed on the plurality of lighting modules and covering the upper portion of the plurality of lighting modules, Each of the above plurality of lighting modules has a length in a second direction orthogonal to the first direction that is longer than the width in the first direction, and The above partition section has a plurality of recesses facing the diffusion sheet, and A lighting device in which the plurality of recesses are penetrated by the bulkhead in the first direction and arranged along the second direction.

15. In Paragraph 14, The above bulkhead includes a support projection disposed between adjacent recesses, and At least one of the plurality of recesses has a length different from the length in the second direction of the support projection, A lighting device in which the depth of at least one of the plurality of recesses is at least twice the thickness of the diffusion sheet.

Images