Lighting device and lighting module comprising same

Abstract

A lighting device according to an embodiment comprises: a substrate; a light source disposed on the substrate; a partition wall; and a pattern mask disposed on the light source, wherein the pattern mask includes a mask substrate and a pattern layer, which is disposed on the mask substrate and has a plurality of patterns, the pattern layer not being able to overlap the mask substrate in the horizontal direction.

Description

Lighting device and lighting module including the same

[0001] The embodiments relate to a lighting device and a lighting module including the same.

[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 pattern mask is placed on a light source to control the path of light emitted from the lighting device or to prevent hotspot phenomena in areas adjacent to the light source. The pattern mask for lighting devices currently under internal research was manufactured using a molding method via a die. However, pattern masks produced by this molding method are formed with a thin thickness, leading to reliability issues where the mask breaks or bends during lighting module assembly. Furthermore, since the pattern is implemented by forming holes in the mask, there is a problem of reduced design freedom, such as regarding the thickness of the pattern.

[0005] Accordingly, there is a need for research to improve reliability during module assembly by securing the thickness of the pattern mask and to realize diversification of optical design by enhancing the design freedom of the pattern.

[0006] One of the technical challenges of the embodiment is to prevent damage to the pattern mask during lighting module assembly and to reduce the difficulty of the assembly process.

[0007] In addition, one of the technical challenges of the embodiment is to improve the degree of freedom of optical design.

[0008] In addition, one of the technical challenges of the embodiment is to reduce the thickness of the lighting device.

[0009] In addition, one of the technical challenges of the embodiment is to prevent hot spots in the area adjacent to the light source.

[0010] 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.

[0011] A lighting device according to an embodiment comprises a substrate; a light source disposed on the substrate; and a partition; and a pattern mask disposed on the light source, wherein the pattern mask comprises a mask substrate; and a pattern layer disposed on the mask substrate and having a plurality of patterns; and wherein the pattern layer may not overlap with the mask substrate in a horizontal direction.

[0012] In addition, in the embodiment, the plurality of patterns may include different thicknesses.

[0013] In addition, in the embodiment, the horizontal widths of the plurality of patterns may differ from each other.

[0014] Additionally, in the embodiment, the pattern layer includes a central portion that overlaps vertically with the light source and an outer portion that surrounds the central portion, and the number of patterns placed in the central portion may be greater than the number of patterns placed in the outer portion.

[0015] In addition, in the embodiment, the plurality of patterns may include a first pattern and a second pattern disposed on the first pattern.

[0016] Additionally, in the embodiment, the horizontal width of the second pattern may be equal to or smaller than the horizontal width of the first pattern.

[0017] In addition, in the embodiment, a step difference may be included between the first pattern and the second pattern.

[0018] In addition, in the embodiment, the thickness of the first pattern and the thickness of the second pattern may be different from each other.

[0019] In addition, in the embodiment, the first pattern and the second pattern may include different materials.

[0020] In addition, in the embodiments, the mask substrate may include a light scattering agent.

[0021]

[0022] Additionally, a lighting device including a pattern mask for a lighting device according to another embodiment comprises a substrate; a light source disposed on the substrate; and a partition; and a pattern mask disposed on the light source, wherein the pattern mask may include any one of the pattern masks of claims 1 to 10.

[0023] Additionally, a lighting device including a pattern mask for a lighting device according to another embodiment comprises a substrate; a light source disposed on the substrate; and a partition; and a pattern mask disposed on the light source, wherein the pattern mask comprises a mask substrate and a pattern layer disposed on the mask substrate and having a plurality of patterns, and the plurality of patterns may have a shape protruding upward from the upper surface of the mask substrate.

[0024] The lighting device according to the embodiment has the technical effect of preventing hot spots.

[0025] For example, referring to FIG. 6, the embodiment can prevent hot spots by forming a pattern located in the central part of the pattern mask that overlaps vertically with the light source to have a larger horizontal width or a larger thickness than a pattern located in the outer part.

[0026] In addition, the lighting device according to the embodiment has the technical effect of improving the degree of freedom of optical design.

[0027] For example, referring to FIG. 7, the embodiment can implement a pattern in multiple layers by manufacturing a pattern mask using a silk printing method, and can improve the degree of freedom of optical design by providing different widths for each of the multiple layers.

[0028] In addition, for example, referring to FIG. 7, the embodiment can improve the degree of freedom of optical design as a plurality of patterns are provided to include different materials.

[0029] In addition, for example, referring to FIG. 7, the embodiment can achieve diversification of optical design by implementing patterns having different heights.

[0030] In addition, the lighting device according to the embodiment has the technical effect of preventing damage to the pattern mask during the assembly of the lighting module, thereby improving reliability and reducing the difficulty of the assembly process.

[0031] For example, referring to FIG. 3, the embodiment can increase the thickness compared to the molding method by manufacturing the pattern mask using a silk printing method, thereby preventing damage to the pattern mask during lighting module assembly and improving workability.

[0032] In addition, the lighting device according to the embodiment has the technical effect of reducing the thickness of the lighting device.

[0033] For example, referring to FIG. 5, the thickness of the lighting device can be reduced by forming a light conversion layer integrally by adding a light scattering material to a mask substrate to form a diffusion layer and then forming a pattern layer.

[0034] 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.

[0035] FIG. 1 is a process diagram showing the manufacturing process of a pattern mask for a lighting device according to an embodiment.

[0036] FIG. 2 is a conceptual diagram showing the pattern mask (145) of FIG. 1.

[0037] FIG. 3 is a conceptual diagram showing a lighting device according to a first embodiment.

[0038] FIG. 4 is a conceptual diagram showing a lighting device according to a second embodiment.

[0039] FIG. 5 is a conceptual diagram showing a lighting device according to a third embodiment.

[0040] FIG. 6 is a drawing showing a pattern mask for a lighting device according to a fourth embodiment.

[0041] FIG. 7 is a drawing showing a pattern mask for a lighting device according to the fifth embodiment.

[0042] FIG. 8 is a plan view of a vehicle with a lighting device applied according to an embodiment of the invention.

[0043] Figure 9 is an example of a display device coupled to the vehicle of Figure 8.

[0044] Figures 10 (a) and (b) are examples of symbols or characters displayed by the display device of Figure 8.

[0045] Hereinafter, preferred embodiments of the invention will be described in detail with reference to the attached drawings.

[0046] 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.

[0047] 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.

[0048] Furthermore, the terms used in the examples are for the purpose of describing the examples and are not intended to limit the invention.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054]

[0055] (Example)

[0056] FIG. 1 is a process diagram showing the manufacturing process of a pattern mask for a vehicle lighting device according to an embodiment. First, a mask substrate (150) can be prepared in FIG. 1 (a). The mask substrate (150) may be made of a transparent material and, for example, may be silicon that does not contain impurities, but is not limited thereto.

[0057] Next, referring to FIG. 1(b), a pattern layer (160) can be formed on the mask substrate (150). At this time, the pattern layer (160) can be formed by a silk printing or screen printing method. Specifically, in the embodiment, a method may be used in which a screen mask having an opening corresponding to an optical pattern is attached to the mask substrate (150), and then the pattern layer (160) is thinly applied by a method such as rolling or blading, and then the screen mask is detached.

[0058] After the pattern layer (160) is formed, the pattern layer (160) can be fixed onto the mask substrate (150) through heat curing.

[0059] In addition, to improve the adhesion between the mask substrate (150) and the pattern layer (160), an adhesive layer may be formed on the mask substrate (150) before the pattern layer (160) is formed, but is not limited thereto.

[0060] Next, referring to (c) of FIG. 1, a mask substrate (150) and a pattern layer (160) formed over a large area can be cut into pixel sizes to create a plurality of pattern masks (145).

[0061]

[0062] FIG. 2 is a conceptual diagram showing the pattern mask (145) of FIG. 1. Referring to FIG. 2, the pattern mask (145) may include a mask substrate (150) cut to pixel size and a pattern layer (160) disposed on the mask substrate (150). The shape of the pattern layer (160) may vary by a screen mask having an opening according to the optical design by a silk printing method. The pattern layer (160) may have a shape protruding from one side of the mask substrate (150) and may have a predetermined height. Accordingly, unlike a pattern mask manufactured by a molding method using a mold, the pattern layer (160) according to the embodiment is provided with a protruding pattern rather than a hole shape, and the distance from a light source (not shown) can be controlled by the shape of the protruding pattern, and there is a technical effect of diversifying the optical design.

[0063]

[0064] FIG. 3 is a conceptual diagram showing a lighting device (1000) according to a first embodiment. FIG. 3 illustrates one pixel area (111) of the lighting device (1000), but the embodiment may include multiple pixel areas (111). The lighting device (1000) may have multiple pixel areas (111) 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 (111). The lighting device (1000) displays images or information such as symbols, logos, symbols, or characters by means of the light source unit (120) disposed within each pixel area (111), and may be defined as a lighting module or a display lamp. Additionally, the lighting device (1000) may be implemented as pixel lighting using the pixel areas (111).

[0065] The lighting device (1000) controls the operation of a light source unit (120) within a pixel area (111) 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 (111) by the turn-on or turn-off of the light source unit (120). The light source unit (120) placed within the pixel area (111) is turned on or turned off depending on whether power is supplied. The pixel area (111) 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 (111) can be defined as a unit pixel or a unit light-emitting unit.

[0066] The top view shape of the multiple pixel areas (111) 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.

[0067] Next, referring to FIG. 3, the lighting device (1000) may include a substrate (100), a light source (120), a partition (130), a pattern mask (145), and a diffusion layer (140).

[0068] The substrate (100) may include a printed circuit board (PCB). For example, the substrate (100) may include 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. The substrate (100) may be a single-layer substrate having a single wiring layer or a multi-layer substrate having multiple wiring layers. The substrate (100) may include at least one of a wiring layer, an insulating layer, and vias. Additionally, the wiring layer may be electrically connected to a light source (120). A reflective layer (not shown) may be additionally disposed on the substrate (100) to reflect light emitted from the light source (120) upward to improve light efficiency. The color of the reflective layer (not shown) may be white, but is not limited thereto. In addition, if the substrate (100) is a flexible PCB, the lighting device (1000) may have flexible characteristics.

[0069]

[0070] Additionally, a partition (130) may be disposed on the substrate (100) to define a pixel area (111), and a light source (120) may be disposed on the substrate (100) within the pixel area (111). The light source (120) may emit light through the upward direction and the side.

[0071] Additionally, a light conversion layer (138) may be disposed on the light source (120) so as to be spaced apart from the light source (120). The light conversion layer (138) may be disposed in a groove provided in the partition wall (130). Additionally, the light conversion layer (138) may be disposed on the partition wall (130) and adhered to the partition wall (130).

[0072] Additionally, the light conversion layer (138) may include a pattern mask (145) and a diffusion layer (140). The pattern mask (145) can control the path of light by partially blocking or reflecting light emitted from the light source (120), and can also prevent hot spots occurring in areas adjacent to the light source (120). Additionally, the diffusion layer (140) can achieve surface light emission by uniformly emitting incident light through scattering.

[0073] Additionally, the pattern mask (145) may include a mask substrate (150) and a pattern layer (160). The pattern layer (160) may be positioned to face the light source (120). Additionally, the mask substrate (150) may be placed on the pattern layer (160). Additionally, a diffusion layer (140) may be placed on the pattern mask (145).

[0074] Meanwhile, the pattern layer (160) may have a shape protruding from one side of the mask substrate (150) as it is formed through a silk printing method. The pattern layer (160) may not overlap with the mask substrate (150) in a horizontal direction. The pattern layer (160) may include a plurality of patterns (170), and the plurality of patterns (170) may be arranged along a horizontal direction below the mask substrate (150), and the arrangement may be controlled according to an optical design. The shape of the upper or lower surface of the plurality of patterns (170) may have various shapes such as a circle, a polygon, or an ellipse, and depending on the embodiment, the size of the upper or lower surface of each of the plurality of patterns (170) may be the same or different from one another.

[0075] For example, the pattern layer (160) may include a central portion (160a) that overlaps vertically with the light source (120) and an outer portion (160b) that surrounds the central portion (160a).

[0076] At this time, the pattern (170) located in the central part (160a) may be different from the pattern (170) located in the outer part (160b). For example, the number of patterns (170) located in the central part (160a) may be greater than the number of patterns (170) located in the outer part (160b). As another example, the arrangement ratio per unit area of ​​the patterns (170) located in the central part (160a) may be higher than the arrangement ratio per unit area of ​​the patterns (170) located in the outer part (160b). Accordingly, there is a technical effect of preventing hot spots on the light source (120) by reflecting light concentrated in the area that overlaps vertically with the light source (120).

[0077] In addition, in the embodiment, the thickness of the mask substrate (150) can be secured as the pattern mask (145) is formed by a silk printing method. Accordingly, the embodiment has the technical effect of reducing the difficulty of the process during module assembly and preventing damage, thereby improving reliability, as the mask substrate is formed thicker compared to one formed by a molding method.

[0078]

[0079] FIG. 4 is a conceptual diagram showing a lighting device (1001) according to a second embodiment. Referring to FIG. 4, a light conversion layer (138) may be disposed on a light source (120) so as to be spaced apart from the light source (120). The light conversion layer (138) may include a diffusion layer (140) and a pattern mask (145). Additionally, the pattern mask (145) may include a mask substrate (150) and a pattern layer (160).

[0080] At this time, the diffusion layer (140) may be positioned to face the light source (120). Additionally, a mask substrate (150) may be placed on the diffusion layer (140). Additionally, a pattern layer (160) may be placed on the mask substrate (150).

[0081] The pattern layer (160) may have a shape that protrudes on the mask substrate (150). Additionally, the pattern layer (160) may not overlap with the mask substrate (150) in a horizontal direction. Accordingly, the second embodiment has the technical effect of designing a light path through the pattern layer (160) after the light emitted from the light source (120) is surface-emitting through the diffusion layer (140).

[0082] Meanwhile, the present disclosure is not limited thereto, and may be configured such that a pattern layer (160) is disposed on the upper surface of a mask substrate (150), and a diffusion layer (140) is disposed in a manner that buries the upper surface of the mask substrate (150) and the upper surface of the pattern layer (160). In this case, the pattern layer (160) may overlap with the diffusion layer (140) in a horizontal direction.

[0083]

[0084] FIG. 5 is a conceptual diagram showing a lighting device (1002) according to a third embodiment. Referring to FIG. 5, a pattern mask (145) may be placed on a light source (120) so as to be spaced apart from the light source (120). At this time, the pattern mask (145) may include a diffusion substrate (152) and a pattern layer (160). The diffusion substrate (152) may be referred to as a diffusion layer. The diffusion substrate (152) may be a substrate formed by adding a light scattering material to the mask substrate (150) in FIG. 1. Subsequently, a pattern layer (160) may be formed on the diffusion substrate (152) through a silk printing method. Referring again to FIG. 5, the diffusion substrate (152) is placed on the light source (120), and a pattern layer (160) may be placed below the diffusion substrate (152) so as to face the light source (120). The pattern layer (160) may not overlap with the diffusion substrate (152) in the horizontal direction.

[0085] Additionally, although FIG. 5 is illustrated as having a pattern layer (160) placed between a diffusion substrate (152) and a light source (120), it may include an embodiment in which the diffusion substrate (152) is placed between a pattern layer (160) and a light source (120) as in FIG. 4.

[0086] Accordingly, the embodiment has the technical effect of reducing the thickness of the lighting device by directly placing a pattern layer (160) on the diffusion substrate (152).

[0087]

[0088] FIG. 6 is a drawing showing a pattern mask (145) for a lighting device according to a fourth embodiment. Referring to FIG. 6, the pattern mask (145) may include a mask substrate (150) and a pattern layer (160) having a plurality of patterns (170). The pattern layer (160) may include a central portion (160a) that overlaps vertically with a light source (not shown) and an outer portion (160b) that surrounds the central portion (160a).

[0089] In an embodiment, a plurality of patterns (170) may be disposed on a mask substrate (150). The plurality of patterns (170) may not overlap with the mask substrate (150) in a horizontal direction. The plurality of patterns (170) may have a shape protruding from one side of the mask substrate (150). The plurality of patterns (170) may include a plurality of first patterns (171) disposed spaced apart from each other. The plurality of first patterns (171) may include a first-1 pattern (171-1) and a first-2 pattern (171-2). In this case, the horizontal width of the first-1 pattern (171-1) and the horizontal width of the first-2 pattern (171-2) may be different. For example, the horizontal width of the first-1 pattern (171-1) placed in the central part (160a) of the pattern layer (160) may be greater than the horizontal width of the first-2 pattern (171-2) located in the outer part (160b). Accordingly, the fourth embodiment has the technical effect of preventing hot spots in the area adjacent to the light source.

[0090] In addition, in the fourth embodiment, as the pattern layer (160) is formed through a silk printing method, a second pattern (172) can be formed on at least one of the plurality of first patterns (171). Specifically, referring to FIG. 1 (b), a pattern layer (160) is formed first on a mask substrate (150) through a silk printing method, heat curing is performed, and an additional pattern layer (not shown) can be formed secondarily through a silk printing method.

[0091] Referring again to FIG. 6, a second pattern (172) may be placed on at least one of the plurality of first patterns (171). For example, the second pattern (172) may be placed on the first-1 pattern (171-1). The second pattern (172) may have the same thickness or a different thickness as the first-1 pattern (171-1). Accordingly, the embodiment has the technical effect of enabling the implementation of patterns (170) having different heights depending on the region of the pattern layer (160), and enabling diversification of optical design by utilizing the thickness of the plurality of patterns (170).

[0092] FIG. 6 illustrates a first pattern (171) and a second pattern (172) placed on the first pattern (171), but additional patterns can be formed on the second pattern (172) by further performing the silk printing process.

[0093]

[0094] FIG. 7 is a drawing showing a pattern mask for a lighting device according to a fifth embodiment. Referring to FIG. 7, a pattern layer (160) having a plurality of patterns (170) may be disposed on a mask substrate (150). The plurality of patterns (170) may include a first pattern (171) and a second pattern (172) disposed on the first pattern (171). Additionally, the first pattern (171) may include a first-1 pattern (171-1) and a first-2 pattern (171-2). In this case, the vertical thickness of the first-1 pattern (171-1) and the vertical thickness of the first-2 pattern (171-2) may be different. For example, the thickness of the first-second pattern (171-2) located in the central part (160a) of the pattern layer (160) may be greater than the thickness of the first-first pattern (171-1) located in the outer part (160b) of the pattern layer (160).

[0095] For a moment, referring to FIG. 1 (b), when forming a pattern layer (160) on a mask substrate (150), a screen mask having an opening is placed on the mask substrate (150), and then silk printing is performed. By forming the thickness of each opening differently according to the optical design, the thicknesses of the first-1 pattern (171-1) and the first-2 pattern (171-2) of FIG. 7 can be formed differently.

[0096] Referring again to FIG. 7, accordingly, the fifth embodiment can implement an optical design pattern according to the area of ​​the pattern layer (160) as the thickness of each of the plurality of patterns is different, and has the technical effect of controlling the optical path.

[0097] In addition, the first-1 pattern (171-1) and the first-2 pattern (171-2) may contain different materials. This allows for the formation of multiple patterns containing different materials by performing a silk printing process on the same plane.

[0098] Additionally, a second pattern (172) may be placed on the first pattern (171). In this case, the horizontal width of the first pattern (171) and the horizontal width of the second pattern (172) may be different. For example, the horizontal width of the second pattern (172) may be smaller than the horizontal width of the first pattern (171).

[0099] Additionally, a plurality of second patterns (172) may be arranged on the first pattern (171).

[0100] Additionally, the first pattern (171) and the second pattern (172) may be patterns formed sequentially, and may also be patterns formed integrally according to the shape of the opening of the screen mask during silk printing.

[0101] In addition, the second pattern (172) may include the same material as the first pattern (171).

[0102] Additionally, the second pattern (172) may include a material different from the first pattern (171). Specifically, by performing the silk printing process two or more times in the same area, the materials applied in each process may be different, thereby providing different materials for the first pattern (171) and the second pattern (172).

[0103] Accordingly, the fifth embodiment can be formed to include different materials depending on the height for a single pattern, and thus has a special technical effect of improving the degree of freedom in optical design.

[0104]

[0105] FIG. 8 is a plan view of a vehicle with a lighting device applied according to an embodiment, FIG. 9 is a drawing showing an example of a tail light and indicator lamp of the vehicle of FIG. 8, and FIG. 10 is an example of a symbol or character of an indicator lamp being displayed by the lighting device of FIG. 9.

[0106] Referring to FIGS. 8 and 9, 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.

[0107] 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.

[0108]

[0109] 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 an example 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.

[0110] 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.

[0111] 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.

[0112] 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. Substrate; A light source disposed on the above substrate; and a partition wall; It includes a pattern mask disposed on the light source, and The above pattern mask is, Mask substrate; and A pattern layer disposed on the above mask substrate and having a plurality of patterns; and A lighting device in which the above pattern layer does not overlap with the mask substrate in a horizontal direction.

2. In Paragraph 1, A lighting device in which the above plurality of patterns include different thicknesses.

3. In Paragraph 1, A lighting device having different horizontal widths for the above multiple patterns.

4. In Paragraph 1, The above pattern layer includes a central portion that overlaps vertically with the light source and an outer portion that surrounds the central portion, and A lighting device in which the number of patterns arranged in the central part is greater than the number of patterns arranged in the outer part.

5. In Paragraph 1, The above plurality of patterns are, A lighting device comprising a first pattern and a second pattern disposed on the first pattern.

6. In Paragraph 5, A lighting device in which the horizontal width of the second pattern is equal to or smaller than the horizontal width of the first pattern.

7. In Paragraph 5, A lighting device in which the thickness of the first pattern and the thickness of the second pattern are different.

8. In Paragraph 5, A lighting device comprising the first pattern and the second pattern having different materials.

9. In Paragraph 1, The above mask substrate is a lighting device comprising a light scattering agent.

10. In Paragraph 1, A lighting device having a plurality of patterns protruding upward from the upper surface of the mask substrate.

Images