Lighting device

Abstract

A lighting device according to an embodiment comprises: a substrate having a plurality of pixel regions; a plurality of light sources, one or more disposed in each of the plurality of pixel regions; a partition surrounding each pixel region; a pattern mask disposed on the partitions; and a diffusion layer disposed on the pattern mask, wherein the diffusion layer may comprise a plurality of diffusion parts corresponding to the respective pixel regions, frames overlapping the partitions in the perpendicular direction, and a plurality of connection parts connecting the plurality of diffusion parts.

Description

lighting device

[0001] The example relates to a lighting device.

[0002] Recently, lighting devices composed of hundreds or thousands of small LEDs are being applied to automotive lighting modules, and various pixel lighting technologies are being proposed, particularly for automotive lighting modules.

[0003] For example, since pixel lighting technology is applied to lighting devices to allow each LED to be controlled independently, it is possible to adjust the lighting according to the surrounding environment or create various lighting effects to produce unique signature lighting.

[0004] Meanwhile, a diffusion layer is placed in each pixel area of ​​the lighting device, but forming the diffusion layer at each individual pixel unit has the disadvantage of slow process speed.

[0005] Accordingly, when forming a diffusion layer at the pixel array level, the process speed increases, but there is a problem in that it is difficult to implement pixel lighting due to optical interference between adjacent pixels.

[0006] Therefore, there is a need for technology that can form a diffusion layer at the pixel array level while blocking light between adjacent pixels.

[0007] One of the technical challenges of the embodiment is to improve the manufacturing process speed of the lighting device.

[0008] In addition, one of the technical challenges of the embodiment is to manufacture the diffusion layer at the cell array level rather than at the individual cell level.

[0009] In addition, one of the technical challenges of the embodiment is to block optical interference between adjacent pixel regions.

[0010] In addition, one of the technical challenges of the embodiment is to improve the ease of assembly and alignment accuracy of the partition, pattern mask, and diffusion layer.

[0011] The technical problems of the embodiments are not limited to those described in this section and include those that can be identified through the description of the invention.

[0012] A lighting device according to an embodiment comprises: a substrate having a plurality of pixel regions; a plurality of light sources, at least one of which is disposed in each of the plurality of pixel regions; a partition wall surrounding each of the plurality of pixel regions; a pattern mask disposed on the partition wall; and a diffusion layer disposed on the pattern mask; wherein the diffusion layer may include a plurality of diffusion portions corresponding to the plurality of pixel regions; a frame that overlaps in a vertical direction with respect to the partition wall; and a plurality of connecting portions connecting the plurality of diffusion portions.

[0013] In addition, in the embodiment, the plurality of connecting parts may be arranged so as to be staggered from each other in a horizontal direction on opposite sides in a corresponding pixel area among the plurality of pixel areas.

[0014] In addition, in the embodiment, the plurality of connecting parts can overlap vertically with the bulkhead.

[0015] In addition, in the embodiment, the vertical thickness of the plurality of connecting parts may decrease as it approaches the center of each of the plurality of connecting parts.

[0016] Additionally, in an embodiment, the frame includes a light blocking portion and a gate on which the plurality of connecting portions are disposed, and the light blocking portion includes a first region and a second region disposed below the first region, and the horizontal width of the second region may be smaller than the horizontal width of the first region.

[0017] Additionally, in the embodiment, the thickness of the second region in the vertical direction may increase from both ends toward the center.

[0018] Additionally, in the embodiment, the pattern mask may include a recess disposed below the plurality of connecting parts.

[0019] Additionally, in the embodiment, the second region may be disposed within the recess.

[0020] Additionally, in the embodiment, the partition wall includes a concave portion and the pattern mask includes a protrusion, the concave portion and the protrusion interlock with each other, and the recess can overlap perpendicularly with the concave portion of the partition wall.

[0021] In addition, in the embodiment, the vertical thickness of the plurality of connecting parts may be thinner than the vertical thickness of the diffusion part.

[0022] In addition, in the embodiment, the vertical thickness of the plurality of connecting parts may be thinner than the vertical thickness of the frame.

[0023] The lighting device according to the embodiment has the technical effect of improving process speed by manufacturing an integrated diffusion layer in multiple pixel areas through a double injection molding process.

[0024] For example, in the embodiment, a diffusion layer can be manufactured using a double injection molding method without separate dispensing, with a frame having a resin-flowing gate and a light-blocking part and a diffusion part.

[0025] In addition, the embodiment has the technical effect of blocking optical interference between adjacent pixel regions.

[0026] For example, an embodiment may have a light blocking member having a first region and a second region, and may prevent light leakage by blocking the light path as a recess is disposed below the light blocking member.

[0027] In addition, the embodiment has the technical effect of improving the alignment accuracy of the barrier, pattern mask, and diffusion layer in a lighting device.

[0028] For example, the embodiment can improve alignment accuracy by forming concave parts, protrusions, recesses, etc. in the partition, pattern mask, and diffusion layer.

[0029] The technical effects of the embodiments are not limited to those described in this section and include those that can be understood through the description of the invention.

[0030] FIG. 1 is a conceptual diagram of a lighting device according to an embodiment.

[0031] Figure 2 is a diagram showing a diffusion layer according to an embodiment.

[0032] FIG. 3 is a conceptual diagram of a lighting device according to a first embodiment.

[0033] FIG. 4 is a conceptual diagram of a lighting device according to a second embodiment.

[0034] FIG. 5 is a conceptual diagram of a lighting device according to a third embodiment.

[0035] FIG. 6 is a conceptual diagram of a lighting device according to a fourth embodiment.

[0036] FIG. 7 is a plan view of a vehicle with a lighting device applied according to an embodiment of the invention.

[0037] Figure 8 is an example of a display device combined with the vehicle of Figure 7.

[0038] Figures 9 (a) and (b) are examples of symbols or characters displayed by the display device of Figure 8.

[0039] Hereinafter, preferred embodiments of the invention will be described in detail with reference to the attached drawings.

[0040] 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.

[0041] In addition, terms used in the embodiments of the present invention (including technical and scientific terms) may be interpreted in a sense that is generally understood by those skilled in the art to which the present invention belongs, unless explicitly and specifically defined otherwise. Terms that are commonly used, such as terms defined in advance, may be interpreted in consideration of their meaning in the context of the relevant technology.

[0042] Furthermore, the terms used in the examples are for the purpose of describing the examples and are not intended to limit the invention.

[0043] 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. Additionally, 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 used merely to distinguish the components from other components and do not determine the essence, order, or sequence of the corresponding components.

[0044] And, where it is stated that a component is 'connected', 'combined', or 'joined' to another component, this may include not only cases where the component is directly connected, combined, or joined to the other component, but also cases where it is 'connected', 'combined', or 'joined' due to another component located between the component and the other component.

[0045] 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.

[0046] The lighting device according to the invention can be applied to various lamp devices that require lighting, such as vehicle lamps, household lighting devices, and industrial lighting devices. For example, when applied to vehicle lamps, it can be applied to headlamps, side mirrors, side marker lights, fog lights, tail lamps, brake lights, daytime running lights, vehicle interior lighting, door scuffs, rear combination lamps, backup lamps, etc.

[0047] The lighting device of the present invention is applicable to indoor and outdoor advertising devices, display devices, and various types of electric vehicles. Furthermore, it is applicable to all lighting-related or advertising-related fields that are currently developed and commercialized or that can be implemented through future technological advancements.

[0048]

[0049] (Example)

[0050] FIG. 1 is a conceptual diagram of a lighting device (100) according to an embodiment. Referring to FIG. 1, the lighting device (100) according to an embodiment may have a plurality of pixel areas (110) arranged in a first horizontal direction and a second horizontal direction perpendicular to the first horizontal direction, and at least one light source (120) may be disposed within each pixel area (110). For example, the pixel area (110) may include a first pixel area (111), a second pixel area (112), and a third pixel area (113) disposed adjacently. The lighting device displays images or information such as symbols, logos, symbols, or characters by means of the light source (120) disposed within each of the pixel areas (110), and may be defined as a lighting module or a display lamp. Additionally, the lighting device (100) may be implemented as pixel lighting using the pixel areas (110).

[0051] The lighting device (100) controls the operation of a light source unit (120) within a pixel area (110) through a control unit (not shown) according to the image or information to be displayed, and displays the image or information by the light extracted through the pixel area (110) by the turn-on or turn-off of the light source unit (120). The light source unit (120) placed within the pixel area (110) is turned on or turned off depending on whether power is supplied. The pixel area (110) can be implemented as a grid type or a unit cell type and can function as a pixel, which is the smallest unit constituting the image or information. The pixel area (110) can be defined as a unit pixel or a unit light-emitting unit.

[0052] The top view shape of the multiple pixel areas (110) may be a polygonal shape such as a square shape or a triangular shape, or may be provided as a circle or an ellipse shape.

[0053] Next, referring to FIG. 1, the lighting device (100) may include a substrate (105), a light source (120), a partition (115), a pattern mask (170), and a diffusion layer (130).

[0054] The substrate (105) may include a printed circuit board (PCB). The substrate (105) 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 (105) is a flexible PCB, the lighting device (10) may have flexible characteristics. The substrate (105) may be electrically connected to the plurality of light sources (120). The substrate (105) may be a single-layer substrate having a single wiring layer or a multi-layer substrate having a plurality of wiring layers.

[0055] The plurality of light sources (120) can be placed on the substrate (105) and emit light in a direction (Z-axis direction) toward the diffusion layer (130). The plurality of light sources (120) can be arranged in parallel in a first direction (X-axis). Additionally, the plurality of light sources (120) can be arranged in parallel along the first direction and the second direction (Y-axis). For example, the plurality of light sources (120) 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 1).

[0056] The light source (120) 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, and the light source (120) 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 device of the light source (120) includes a mini LED chip or a micro LED chip.

[0057] Additionally, the partition (115) can prevent interference between adjacent pixel regions (110). The spacing of the partition (115) may define the width of the pixel region (110), but is not limited thereto. The plurality of pixel regions (110) partitioned by the partition (115) may be implemented as a grid type or a unit cell type and may function as pixels, which are the smallest units constituting an image or information. Each of the plurality of pixel regions (110) may be defined as a unit pixel or a unit light-emitting part.

[0058] The top-view shape of each of the plurality of pixel areas (110) may have a polygonal shape such as a square or a triangular shape, or may be implemented as a circle or an ellipse. The shapes and number of pixels disclosed in the drawings are exemplary and are not limited thereto.

[0059] The above partition (115) may include, but is not limited to, silicone or epoxy materials, and may include metal materials. For example, the above partition (115) may include PDMS (Polydimethylsiloxane), TPU (Thermoplastic Polyurethane), etc. Additionally, the above partition (115) may be implemented in a black color by including a light-absorbing material such as carbon black. As another example, the above partition (115) may include a reflective material such as TiO2, SiO2, Al2O3.

[0060] Additionally, a pattern mask (170) may be placed on the light source (120). The pattern mask (170) can control the path of light by partially blocking or reflecting the light emitted from the light source (120), and can also prevent hot spots occurring in areas adjacent to the light source (120). The pattern mask (170) may include a plurality of optical patterns.

[0061] The pattern mask (170) may include a pattern area and a non-pattern area. The pattern area may overlap with the light source (120) in a third direction (z-axis). The non-pattern area may be placed around the pattern area. The non-pattern area (NPA) may overlap with the partition wall (115) in a third direction.

[0062] The pattern mask (170) may include a material with high reflectivity so that the surface facing the light source (120) can reflect light. For example, the pattern mask (170) may include a metal, for example, one of Cu, Ag, or Al, or an alloy containing at least one of these. As another example, the pattern mask (170) may include a polymer such as PC, silicon, or other materials having reflectivity.

[0063] The pattern mask (170) may be formed in the shape of a thin plate. The pattern mask (170) may be bendable.

[0064] A pattern formed with a plurality of through holes (not shown) may be formed in the pattern area of ​​the pattern mask (170). Specifically, a pattern formed with through holes penetrating the upper and lower surfaces of the pattern mask (170) may be formed in the pattern area of ​​the pattern mask (170).

[0065] Light emitted from the light source (120) can be emitted to the outside through the through hole. In the part where the through hole is not formed, the light from the light source (120) can be reflected.

[0066] Additionally, light reflected from the portion where the through hole is not formed may be reflected back toward the pattern mask (170) from the substrate (105) or partition (115). The shape of the upper or lower surface of the through hole may have various shapes such as a circle, polygon, or ellipse, and depending on the embodiment, the size of each upper or lower surface of the through hole may be the same or different from one another.

[0067] The pattern located in the center of the pattern area may differ from the pattern located in the outer part of the pattern area. For example, the number of patterns located in the center may be greater than the number of patterns located in the outer part. As another example, the placement ratio per unit area of ​​the patterns located in the center may be higher than the placement ratio per unit area of ​​the patterns located in the outer part. Accordingly, the light uniformity and light efficiency of the lighting module may be improved.

[0068] Additionally, an air gap may be disposed between the light source (120) and the pattern mask (170). However, the present disclosure is not limited thereto, and according to an embodiment, a resin layer (not shown) containing silicone or epoxy may be included between the light source (120) and the pattern mask (170).

[0069] In addition, a diffusion layer (130) may be placed on the pattern mask (170).

[0070] The above-mentioned diffusion layer (130) can form a uniform surface light source by scattering light emitted from a light source (120). The above-mentioned diffusion layer (130) may be formed from a resin material such as silicone or epoxy. The above-mentioned diffusion layer (130) may be a transparent resin material. The above-mentioned diffusion layer (130) may contain a diffusing agent (not shown) inside, and the diffusing agent may include at least one of Al2O3, TiO2, SiO2, ZnO, and ZrO2. The above-mentioned diffusion layer (130) may be formed from a transparent resin or a translucent resin material.

[0071] Meanwhile, in the embodiment, the diffusion layer (130) may include a plurality of diffusion sections (160), a plurality of connecting sections (165), and a frame (140).

[0072] A plurality of diffusion units (160) may be positioned to correspond to each of a plurality of pixel regions (110). For example, each of the plurality of diffusion units (160) may be positioned to overlap with the corresponding plurality of pixel regions (110) in a third direction. Accordingly, the number of the plurality of diffusion units (160) may be equal to the number of the plurality of pixel regions (110).

[0073] The frame (140) may be positioned to correspond to the partition wall (115) surrounding each pixel area (110). For example, the frame (140) may be positioned so that at least a portion overlaps the partition wall (115) in a third direction.

[0074] The above frame (140) may include a light blocking section (150) and a gate (155). The light blocking section (150) may be placed between adjacent pixel regions (110) to prevent light leakage between pixel regions (110). For example, the light blocking section (150) may prevent light within the first pixel region (111) from interfering with the second pixel region (112). In the area of ​​the light blocking section (150) where the gate (155) described later is not placed, it may extend from the upper surface of the diffusion layer (130) toward the pattern mask (170) and come into contact with the upper surface of the pattern mask (170). Meanwhile, in the area of ​​the light blocking section (150) where the gate (155) described later is placed, it may extend from the upper surface of the diffusion layer (130) toward the pattern mask (170) and come into contact with the upper surface of the connection section (165) described later.

[0075] The gate (155) is an open area placed on a part of the lower surface of the light blocking part (150). When manufacturing the diffusion layer (130), a frame (140) including the light blocking part (150) and the gate (155) is first injected, and then a plurality of diffusion parts (160) can be injected simultaneously by inducing the resin to flow through the gate (155). The resin layer placed in the area of ​​the gate (155) can correspond to a plurality of connecting parts (165). That is, a plurality of connecting parts (165) can be placed in the area of ​​the gate (155) to connect adjacent diffusion parts (160).

[0076] The gate (155) and the plurality of connecting parts (165) may be disposed between the light blocking part (150) and the pattern mask (170). The thickness of the gate (155) and the plurality of connecting parts (165) in the third direction may be thinner than the thickness of the light blocking part (150). For example, the thickness of the gate (155) and the plurality of connecting parts (165) in the third direction may be greater than 0 mm and less than or equal to 0.1 mm. For example, the thickness of the gate (155) and the plurality of connecting parts (165) in the third direction may be 0.05 mm.

[0077] And the gate (155) and the plurality of connecting parts (165) may overlap with the light blocking part (150) in a third direction. Additionally, the gate (155) and the plurality of connecting parts (165) may also overlap with the partition wall (115) in a third direction. Meanwhile, according to an embodiment, the gate (155) and the plurality of connecting parts (165) may be disposed on the upper surface of the light blocking part (150).

[0078] The gate (155) and the plurality of connecting parts (165) may not overlap with the pattern area of ​​the pattern mask (170) in the third direction.

[0079] Accordingly, the embodiment has the technical effect of being able to improve the process speed by manufacturing an integrated diffusion layer (130) in multiple pixel areas through a double injection molding process.

[0080] FIG. 2 is a drawing showing a diffusion layer according to an embodiment. FIG. 2 is a drawing showing the appearance of the diffusion layer (130) as viewed from the bottom surface of the diffusion layer (130) of FIG. 1. Referring to FIG. 2, the frame (140) may include a gate (155) and a light blocking part (150). Specifically, a gate (155) may be disposed between adjacent pixel regions (110) in a plurality of pixel regions (110). And a connection part (165) may be disposed in the region of the gate (155).

[0081] The gate (155) (or connecting portion (165)) may be placed on each of the two sides facing each other in each pixel area (110). The secondary injected resin may flow through the gate (155) and form multiple diffusion portions (160) by filling all of the multiple pixel areas without additional dispensing, and the resin placed in the gate (155) may form multiple connecting portions (165). Afterward, the injected resin may be cured to manufacture a diffusion layer (130).

[0082] The gate (155) may be positioned in an area corresponding to the side of a plurality of pixel regions (110) along the first direction (or second direction) for a plurality of pixel regions (110) arranged side by side in a first direction (or second direction).

[0083] Specifically, when the first pixel area (111), the second pixel area (112), and the third pixel area (113) are arranged side by side in a first direction (or a second direction), the gate (155) may include a first gate (155-1) located on one side of the first pixel area (111), a second gate (155-2) located between the first pixel area (111) and the second pixel area (112), and a third gate (155-3) located between the second pixel area (112) and the third pixel area (113), and the first gate (155-1), the second gate (155-2), and the third gate (155-3) may be arranged along the first direction (or a second direction).

[0084] A first gate (155-1) and a second gate (155-2) may be disposed on both sides of the first pixel area (111), and a second gate (155-2) and a third gate (155-3) may be disposed on both sides of the second pixel area (112).

[0085] At this time, a pair of gates (155) adjacent to each pixel area (110) can be arranged diagonally.

[0086] For example, adjacent first gates (155-1) and second gates (155-2) may be arranged so as to be staggered from each other in a first direction (or a second direction). Specifically, adjacent first gates (155-1) and second gates (155-2) may be arranged so as not to overlap from each other in a first direction (or a second direction).

[0087] Meanwhile, the first gate (155-1) and the third gate (155-3), which are not adjacent to each other, may be arranged so that at least a portion overlaps in the first direction (or the second direction). Additionally, a light blocking section (150) may be arranged on the line connecting the first gate (155-1) and the third gate (155-3).

[0088] The above connecting portion (165) may be placed in the same area where the gate (150) is placed. That is, for a plurality of pixel areas (110) arranged side by side in a first direction (or second direction), the connecting portion (165) may be placed in an area corresponding to the side of the plurality of pixel areas (110) along the first direction (or second direction).

[0089] Specifically, when the first pixel area (111), the second pixel area (112), and the third pixel area (113) are arranged side by side in a first direction (or a second direction), the connecting part (165) may include a first connecting part (165-1) located on one side of the first pixel area (111), a second connecting part (165-2) located between the first pixel area (111) and the second pixel area (112), and a third connecting part (165-3) located between the second pixel area (112) and the third pixel area (113), and the first connecting part (165-1), the second connecting part (165-2), and the third connecting part (165-3) may be arranged along the first direction (or a second direction).

[0090] A first connecting part (165-1) and a second connecting part (165-2) may be disposed on both sides of the first pixel area (111), and a second connecting part (165-2) and a third connecting part (165-3) may be disposed on both sides of the second pixel area (112).

[0091] At this time, a pair of connecting parts (165) adjacent to each pixel area (110) can be arranged diagonally.

[0092] For example, the first connecting part (165-1) and the second connecting part (165-2) adjacent to each other may be arranged so as to be staggered from each other in the first direction (or the second direction). Specifically, the first connecting part (165-1) and the second connecting part (165-2) adjacent to each other may be arranged so as not to overlap from each other in the first direction (or the second direction).

[0093] Meanwhile, the first connecting part (165-1) and the third connecting part (165-3), which are not adjacent to each other, may be arranged so that at least a portion overlaps in the first direction (or the second direction). Additionally, a light blocking part (150) may be arranged on the line connecting the first connecting part (165-1) and the third connecting part (165-3).

[0094] Additionally, a group of multiple pixel regions (110) arranged side by side in a first direction (or a second direction) may be arranged in multiple ways in a second direction (or a first direction), and such multiple groups may form a single diffusion layer (130).

[0095] Accordingly, the embodiment has the technical effect of allowing the diffusion layer to be uniformly formed within the pixel area during secondary injection by arranging the gates so that they are staggered on both sides of each pixel area.

[0096] In addition, the embodiment has the technical effect of preventing light leakage through multiple gates by arranging the gates so that they are staggered on both sides of each pixel area.

[0097]

[0098] FIG. 3 is a conceptual diagram of a lighting device according to a first embodiment. FIG. 3 is a cross-sectional view of FIG. 2, AA, showing a pixel area in FIG. 1. Referring to FIG. 3, the lighting device according to the embodiment may include a substrate (105), a light source (120), a partition (115), a pattern mask (170), and a diffusion layer (130).

[0099] A light source (120) and a partition wall (115) may be disposed on the substrate (105). Additionally, the pattern mask (170) may be disposed on the partition wall (115), and the diffusion layer (130) may be disposed on the pattern mask (170).

[0100] The lighting device may further include a reflective layer (119). In one embodiment, the reflective layer (119) may be a separate component disposed on the substrate (105) or may be formed integrally with the partition (115). According to an embodiment, the reflective layer (119) may include at least one of Al2O3, TiO2, SiO2, ZnO, and ZrO2.

[0101] The above partition (115) may include a concave portion (117). Additionally, the pattern mask (170) may include a protrusion (175). The protrusion (175) may engage with the concave portion (117).

[0102] Accordingly, in the embodiment, the partition wall (115) and the pattern mask (170) can be joined without a separate adhesive layer as they include a concave portion (117) and a protruding portion (175).

[0103] The above diffusion layer (130) may include a frame portion (140) disposed in an area overlapping with the partition wall (115) and a diffusion portion (160) disposed in an area overlapping with the light source (120).

[0104] At this time, the frame portion (140) may include a gate (155) and a light blocking portion (150).

[0105] The gate (155) and the light blocking part (150) can be overlapped vertically (third direction). The gate (155) can be placed below the light blocking part (150).

[0106] Additionally, a connecting portion (165) is disposed in the area of ​​the gate (155) to connect adjacent diffusion portions (160). The connecting portion (165) and the diffusion portion (160) may each contain the same material.

[0107] Multiple connecting parts (165) may have a thickness in the third direction that is thinner than the light blocking part (150) that overlaps each other vertically (third direction).

[0108] Additionally, the plurality of connecting portions (165) may have a thickness in a third direction that is thinner than the plurality of diffusion portions (160). The width in the first or second direction of the plurality of connecting portions (165) may be the same as the width in the first or second direction of the lower surface of the light blocking portion (150) that overlaps each other vertically (in the third direction).

[0109] Accordingly, the embodiment has the technical effect of enabling double injection when forming the diffusion layer (130) through the gate (155), while also reducing light emitted from the light source (120) to adjacent pixels through the light blocking part (150).

[0110]

[0111] FIG. 4 is a conceptual diagram of a lighting device according to a second embodiment.

[0112] A second embodiment may include the technical features of a first embodiment. For example, in a second embodiment, the diffusion layer (130) includes a diffusion section (160), a connection section (165), and a frame section (140), and the frame section (140) may include a gate (155) and a light blocking section (150).

[0113] Next, referring to FIG. 4, the light blocking portion (150) may include a first area (150-1) and a second area (150-2) disposed below the first area (150-1). The width of the first area (150-1) may be constant along the vertical direction (third direction) without changing in the horizontal direction (first direction or second direction). The second area (150-2) may have a shape protruding from the first area (150-1).

[0114] Additionally, the width of the second region (150-2) can vary along the vertical direction.

[0115] Additionally, the height of the gate (155) or the height of the connection part (165) or the distance between the lower surface of the second region (150-2) and the upper surface of the pattern mask (170) may vary along the horizontal direction.

[0116] In detail, the thickness of the second region (150-2) may increase from both ends toward the center. Additionally, the first thickness (D1) of the gate (155) (or connection part (165)) overlapping with the center of the second region (150-2) may be smaller than the second thickness (D2) of the gate (155) (or connection part (165)) overlapping with both ends of the second region (150-2).

[0117] Therefore, the thickness of the gate (155) (or connection part (165)) leading from one pixel area to an adjacent area may decrease as it approaches the center.

[0118] Accordingly, the embodiment has the technical effect of being able to manufacture the diffusion layer (130) through the gate (155) using a double injection molding method, and at the same time, by providing a light blocking part (150) having a first region (150-1) and a second region (150-2), the thickness of the gate (155) or the connecting part (165) decreases as it moves toward adjacent pixel regions, thereby minimizing light escaping through the gate (155) or the connecting part (165).

[0119]

[0120] FIG. 5 is a conceptual diagram of a lighting device according to a third embodiment.

[0121] A third embodiment may include the technical features of a first embodiment. For example, in a third embodiment, the diffusion layer (130) includes a diffusion section (160), a connection section (165), and a frame section (140), and the frame section (140) may include a gate (155) and a light blocking section (150).

[0122] Next, referring to FIG. 5, the light blocking portion (150) may include a first area (150-1) and a second area (150-2) disposed below the first area (150-1). The first area (150-1) may have a constant width in the horizontal direction (first direction or second direction) without changing along the vertical direction (third direction). The second area (150-2) may have a shape protruding from the first area (150-1).

[0123] The thickness of the second region (150-2) above may increase in the vertical direction from both ends toward the center.

[0124] At this time, the pattern mask (170) may include a first recess (170-1). The first recess (170-1) may be placed on the upper surface of the pattern mask (170) in an area that overlaps vertically with the light blocking portion (150).

[0125] In FIG. 5, the side of the first recess (170-1) is shown to have a constant slope, but it may include a case where it has a curved surface.

[0126] Additionally, the light blocking member (150) may be disposed on the first recess (170-1). The second region (150-2) of the light blocking member (150) may overlap vertically with the first recess (170-1).

[0127] Additionally, a gate (155) may be formed between the second region (150-2) and the first recess (170-1). A connecting portion (165) may be disposed in the region of the gate (155) to connect adjacent diffusion portions (160).

[0128] At least a portion of the gate (155) or the connection part (165) may overlap with the pattern mask (170) in the horizontal direction.

[0129] Meanwhile, the third thickness (D3) in the vertical direction of the gate (155) or connection part (165) that overlaps with the central part of the second region (150-2) may be smaller than or equal to the fourth thickness (D4) in the vertical direction of the gate (155) (or connection part (165)) that overlaps with both ends of the second region (150-2).

[0130] Accordingly, the vertical thickness of the gate (155) (or connection part (165)) may decrease or remain the same from both ends toward the center.

[0131] Accordingly, the embodiment has the technical effect of being able to manufacture a diffusion layer (130) through a double injection molding process through a gate (155) and simultaneously prevent light leakage in adjacent pixel areas, as the pattern mask (170) is provided with a first recess (170-1) and a light blocking portion (150) is disposed on the first recess (170-1).

[0132] Additionally, the first recess (170-1) can be superimposed in a vertical direction with the protrusion (175) of the pattern mask (170). Also, the bottom surface of the first recess (170-1) and the bottom surface of the second region (150-2) can be superimposed in a vertical direction. The center of the first recess (170-1) and the center of the light blocking portion (150) can be superimposed in a vertical direction.

[0133] Accordingly, the pattern mask (170) can be aligned with the partition wall (115) at the bottom and with the diffusion layer (130) at the top.

[0134] Accordingly, the embodiment has the technical effect of improving the alignment accuracy of the partition wall (115), pattern mask (170), and diffusion layer (130).

[0135]

[0136] FIG. 6 is a conceptual diagram of a lighting device according to a fourth embodiment.

[0137] The fourth embodiment may include the technical features of the first embodiment. For example, in the fourth embodiment, the diffusion layer (130) includes a diffusion section (160), a connection section (165), and a frame section (140), and the frame section (140) may include a gate (155) and a light blocking section (150).

[0138] Next, referring to FIG. 6, the light blocking portion (150) may include a first area (150-1) and a second area (150-2) disposed below the first area (150-1). The first area (150-1) may have a constant width in the horizontal direction (first direction or second direction) without changing along the vertical direction (third direction). The second area (150-2) may have a shape protruding from the first area (150-1).

[0139] Meanwhile, the pattern mask (170) may include a second recess (170-2). The second recess (170-2) may be positioned in an area that overlaps vertically with the light blocking portion (150) on the upper surface of the pattern mask (170).

[0140] Additionally, the second region (150-2) of the light blocking portion (150) may be placed within the second recess (170-2). The second region (150-2) may overlap with the pattern mask (170) in a horizontal direction.

[0141] Additionally, the bottom surface of the second region (150-2) and the bottom surface of the second recess (170-2) can be arranged parallel to each other.

[0142] Additionally, a gate (155) may be formed by the second recess (170-2) and the second region (150-2). A connecting portion (165) may be disposed in the region of the gate (155) to connect adjacent diffusion portions (160).

[0143] At least a portion of the gate (155) or the connection part (165) may overlap with the pattern mask (170) in the horizontal direction.

[0144] Additionally, the fifth thickness (D5) in the vertical direction of the gate (155) (or connection part (165)) may be smaller than the horizontal length (D6) of the gate (155) (or connection part (165)) within the second recess (170-2). Additionally, the horizontal length (D6) of the gate (155) (or connection part (165)) may be smaller than the horizontal length of the lower surface of the first region (150-1).

[0145] Accordingly, the embodiment has a technical effect in that the pattern mask (170) is provided with a second recess (170-2), and a light blocking part (150) is disposed within the second recess (170-2), thereby enabling the diffusion layer (130) to be manufactured by a double injection molding method through a gate (155) and simultaneously preventing light leakage in adjacent pixel areas.

[0146] Additionally, the second recess (170-2) can be vertically overlapped with the protrusion (175) of the pattern mask (170). Additionally, the center of the second recess (170-2) and the center of the light blocking portion (150) can be vertically overlapped.

[0147] Accordingly, the pattern mask (170) can be aligned with the partition wall (115) at the bottom and with the diffusion layer (130) at the top.

[0148] Accordingly, the embodiment has the technical effect of improving the alignment accuracy of the partition wall (115), pattern mask (170), and diffusion layer (130).

[0149]

[0150] FIG. 7 is a plan view of a vehicle with a lighting device according to an embodiment, FIG. 8 is a drawing showing an example of a taillight and indicator lamp of the vehicle of FIG. 7, and FIG. 9 is an example showing a symbol or character of an indicator lamp displayed by the lighting device of FIG. 8.

[0151] Referring to FIGS. 7 and 8, the front lamp (2) of the moving body or vehicle (1) may include one or more lighting modules, and by individually controlling the driving timing of these lighting modules, it 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 lamp may be applied as a daytime running light, high beam, low beam, fog light, or turn signal. The taillight (2) of the vehicle (1) may have a plurality of lamp units, and the lamp units may be provided as taillights, brake lights, reverse lights, and turn signal lamps.

[0152] The lighting device (1000) may be positioned on one side or the other side relative to the taillight (2) of the vehicle (1), positioned on the upper or lower side, or installed in a part of the rear of the vehicle. The lighting device (1000) may be installed on the side of the vehicle or inside the vehicle. This lighting device (1000) displays images or information such as symbols, logos, symbols, or characters through a plurality of pixel areas (111) and is provided as a lighting module or a display lamp. That is, as shown in (a) and (b) of FIG. 10, it may be displayed as an exclamation mark such as ! or as a character such as STOP that can be seen by other drivers. This lighting device (1000) may have pixel areas (111) with a double partition structure, and the double partition structure may prevent light interference or light leakage between adjacent pixel areas (111). Accordingly, it may prevent a decrease in the brightness of the pixels and provide a lighting device with a clearer contrast ratio. In addition, by providing the lighting device (1000) with a thickness of less than 4mm or 3mm or less, rigid or flexible, the lighting device (1000) can be closely coupled to the surface of the housing or bracket of the vehicle. The lighting device (1000) can be applied to a headlight or taillight to function as a headlight or taillight, or display an image or information in the headlight or taillight.

[0153]

[0154] 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 a person skilled in the art to which the embodiments belong.

[0155] Therefore, details regarding such combinations and variations should be interpreted as being included within the scope of the present invention. Furthermore, although the above description has focused on embodiments, this is merely illustrative and does not limit the present invention. Those 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.

[0156] For example, each component specifically shown in the embodiments may be implemented with modifications. Furthermore, differences related to such modifications and applications should be interpreted as being included within the scope of the invention as defined in the appended claims.

[0157] The lighting device according to the invention can be applied to various lamp devices requiring lighting, such as vehicle lamps, household lighting devices, and industrial lighting devices.

[0158] For example, when applied to vehicle lamps, it can be applied to headlamps, side mirrors, side marker lights, fog lights, tail lamps, brake lights, daytime running lights, vehicle interior lighting, door scuffs, rear combination lamps, backup lamps, etc.

[0159] The lighting device of the present invention is applicable to indoor and outdoor advertising devices, display devices, and various types of electric vehicles. Furthermore, it is applicable to all lighting-related or advertising-related fields that are currently developed and commercialized or that can be implemented through future technological advancements.

Claims

1. A substrate having a plurality of pixel regions; A plurality of light sources, at least one of which is disposed in each of the plurality of pixel regions; A partition wall surrounding each of the above plurality of pixel regions; A pattern mask disposed on the above bulkhead; and A diffusion layer disposed on the above pattern mask; comprising, The above diffusion layer is, A plurality of diffusion sections corresponding to the above plurality of pixel regions; A frame that overlaps the above bulkhead in a vertical direction; and A lighting device comprising a plurality of connecting parts connecting the plurality of diffusion parts.

2. In Paragraph 1, A lighting device in which the plurality of connecting parts are arranged to be staggered from each other in a horizontal direction on opposite sides in a corresponding pixel area among the plurality of pixel areas.

3. In Paragraph 1, A lighting device in which the above plurality of connecting parts overlap vertically with the above bulkhead.

4. In Paragraph 1, A lighting device in which the vertical thickness of the plurality of connecting parts decreases toward the center of each of the plurality of connecting parts.

5. In Paragraph 1, The above frame is, It includes a light blocking part and a gate in which the plurality of connection parts are arranged, The light blocking unit includes a first region and a second region disposed below the first region, and A lighting device in which the horizontal width of the second region is smaller than the horizontal width of the first region.

6. In Paragraph 5, The above second region is a lighting device in which the thickness in the vertical direction increases from both ends toward the center.

7. In Paragraph 5, A lighting device comprising a pattern mask including a recess disposed below the plurality of connecting parts.

8. In Paragraph 7, A lighting device in which the second region is disposed within the above recess.

9. In Paragraph 7, The above partition includes a concave portion, and The above pattern mask includes protrusions, The above-mentioned concave portion and the above-mentioned protrusion interlock with each other, and The above recess is a lighting device that overlaps vertically with the concave portion of the above bulkhead.

10. In Paragraph 1, The vertical thickness of the above plurality of connecting parts is, A lighting device thinner than the vertical thickness of the above-mentioned diffusion section.

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