Light source module

Abstract

The utility model discloses a light source module and a display device, and aims at reducing the brightness uneven or chromaticity uneven caused by the thermal contraction of the dividing component in the light source module with the dividing component. The light source module has: a substrate; a plurality of light sources arranged on the substrate and arranged on the lattice points of a rectangular lattice on the substrate respectively; a dividing component arranged on the substrate and divided according to each light-emitting area containing each of the plurality of light sources, and having a wall part with an edge line. In the rectangular area with the four lattice points constituting the smallest rectangle as the corner part containing four light-emitting areas, the intersection point of the edge line of the wall part is away from the center of the rectangular area.

Description

Technical Field

[0001] This disclosure relates to a light source module. Background Technology

[0002] Conventionally, there are known lighting devices that have a substrate with multiple light-emitting elements arranged thereon and a reflective member disposed on the substrate. In such lighting devices, light-emitting elements are disposed in each opening provided in the reflective member.

[0003] In this lighting device, uneven brightness sometimes occurs due to thermal shrinkage of the reflective component under high temperature conditions. Therefore, countermeasures have been implemented to reduce the impact of thermal shrinkage of the reflective component (for example, see Japanese Patent Application Publication No. 2019-185921). Utility Model Content

[0004] Technical problem to be solved by the utility model

[0005] The purpose of this disclosure is to reduce brightness or color unevenness caused by thermal shrinkage of the dividing components in a light source module having dividing components.

[0006] Technical solutions for solving technical problems

[0007] A light source module according to one embodiment of the present disclosure includes: a substrate; a plurality of light sources disposed on the substrate and respectively disposed on grid points of a rectangular grid on the substrate; a dividing member disposed on the substrate and divided according to a light-emitting area comprising each of the plurality of light sources, and having a wall portion having ridges, wherein four light-emitting areas are contained in a rectangular area where the four grid points constituting the minimum rectangle are corners, and the intersection of the ridges of the wall portion is away from the center of the rectangular area.

[0008] Utility Model Effect

[0009] According to one embodiment of the present disclosure, in a light source module having dividing components, it is possible to reduce brightness or color unevenness caused by thermal shrinkage of the dividing components. Attached Figure Description

[0010] Figure 1 This is a schematic top view showing a portion of the light source module in the first embodiment.

[0011] Figure 2 yes Figure 1 End face view of line II-II.

[0012] Figure 3 This is a top view showing the division of components.

[0013] Figure 4 Viewed from the X direction Figure 3 A diagram showing the division of components.

[0014] Figure 5 This is a top view showing a modified example of the light source module.

[0015] Figure 6 This is a top view showing a variation of the division of components.

[0016] Figure 7 This is a cross-sectional view showing a modified example of a light-emitting element.

[0017] Figure 8 This is a cross-sectional view showing a modified example of a light-emitting element.

[0018] Figure 9 This is a schematic top view showing a portion of the light source module in the second embodiment.

[0019] Figure 10 It is an exploded perspective view showing a part of a liquid crystal display device. Detailed Implementation

[0020] Hereinafter, the embodiments for implementing the utility model will be described with reference to the accompanying drawings. In the following description, terms indicating specific directions or positions (e.g., "upper," "lower," and other terms including these terms) will be used as needed. The use of these terms is to facilitate understanding of the utility model with reference to the accompanying drawings, and the technical scope of the utility model is not limited by these terms. Parts represented by the same symbols in the various drawings represent the same or equivalent parts or components. The following examples of embodiments are used to embody the technical concept of the utility model, such as light source modules, and do not limit the utility model to the following. Furthermore, the dimensions, materials, shapes, and relative arrangements of the constituent components described below are not intended to limit the scope of the utility model unless specifically stated otherwise, but are intended as examples. The content described in one embodiment can also be applied to other embodiments or variations. The size or positional relationships of the components shown in the drawings are sometimes exaggerated for clarity. To avoid making the drawings overly complex, sometimes schematic diagrams with some elements omitted are used, or end views showing only cross-sections are used as sectional views.

[0021] First Implementation Method

[0022] like Figure 1 and Figure 2 As shown, the light source module 10 of this embodiment has a substrate 1, a plurality of light sources 2 disposed on the substrate 1, and a dividing member 3 disposed on the substrate 1.

[0023] Multiple light sources 2 are respectively disposed on the grid points of a rectangular grid on the substrate 1. The rectangular grid is, for example, formed by points on the substrate 1 along a first direction (in... Figure 1 The middle direction is the X direction) and the second direction orthogonal to the first direction (in ... Figure 1 It consists of the first line X1 and the second line Y2 extending in the Y direction.

[0024] The dividing component 3 is divided into light-emitting areas 30, each of which contains one of a plurality of light sources 2, and has a wall portion 60 having ridges 41 and 51.

[0025] The four grid points that form the smallest rectangle become the rectangular region M at the corner, which contains four luminous regions 30.

[0026] In the dividing component 3, the intersection point Q of the edges 41 and 51 of the wall portion 60 is far from the center of the rectangular region M. In other words, in the dividing component 3, the intersection point Q of the edges 41 and 51 of the wall portion 60 is not aligned with the center of the rectangular region M and does not overlap. Furthermore, the edges 41 and 51 that are continuous with the two adjacent light-emitting regions 30 are arranged in a zigzag shape. By configuring the light source module in this way, even if thermal shrinkage occurs in the dividing component due to high temperatures, the zigzag or curved shape of the wall portion and edges can interrupt the deformation caused by thermal shrinkage, thereby mitigating the positional shift of the wall portion relative to the light source and reducing the occurrence of uneven brightness or color.

[0027] (Substrate 1)

[0028] The substrate 1 is a component for mounting a plurality of light sources 2. The substrate 1 includes a substrate 11, conductor wiring 12 disposed on its upper surface for supplying power to the light sources 2, and a cover member 13. The cover member 13 covers at least a portion of the conductor wiring 12 that is not electrically connected to the light sources 2, etc.

[0029] The material for the substrate 11 can be anything that can insulate and separate at least one pair of conductor wires 12; examples include ceramics, resins, and composite materials. Examples of resins include phenolic resins, epoxy resins, polyimide resins, BT resins, polyphthalamide (PPA), and polyethylene terephthalate (PET). Examples of composite materials include materials obtained by mixing inorganic fillers such as glass fiber, SiO2, TiO2, and Al2O3 into the aforementioned resins, and metal substrates with an insulating layer covering metal parts.

[0030] The thickness of the substrate 11 can be appropriately set. The substrate 11 can be either a flexible substrate or a rigid substrate that can be manufactured in a roll-to-roll manner. The rigid substrate can also be a thin rigid substrate that can be bent. The conductor wiring 12 can be any conductive component, and the material is not particularly limited. The material commonly used as wiring layers in circuit boards can be formed at any thickness.

[0031] The cover component 13 is made of an insulating material. The same materials used as those used as the substrate 11 can be cited as materials for the cover component 13. The cover component 13 may also be light-reflective. For example, by using a component containing light-reflective filler or multiple air bubbles in the resin described above as the cover component 13, the light emitted from the light source 2 is reflected, thereby improving the light extraction efficiency of the light source module.

[0032] (Light source 2)

[0033] Light source 2 is disposed on substrate 1, such as Figure 1 As shown, from a top view taken in the Z direction, the light sources are respectively arranged on the grid points of a rectangular grid. Here, a rectangular grid refers to a grid whose four sides intersect at right angles, and opposite sides are of equal length. The shape of the rectangular grid can include squares and rectangles. The length between grid points can be, for example, more than 3 times and less than 10 times the diameter of the light source 2 or the length of one side, preferably more than 3 times and less than 5 times. Specifically, it can be more than 1 mm and less than 50 mm, preferably more than 5 mm and less than 20 mm, more preferably more than 6 mm and less than 15 mm. The center or centroid of the light source 2 is preferably arranged to coincide with the grid points of the rectangular grid. Preferably, all the light sources 2 in a light source module are arranged on the grid points of the rectangular grid. However, some of the light sources constituting a light source module may not be arranged on the grid points, or some of the grid points in a light source module may not have light sources arranged on them.

[0034] The region comprising the four grid points that form the smallest rectangle, which are then the corners, is called the rectangular region M. The rectangular region M spans the four luminous regions 30. In other words, the rectangular region M includes a portion of each of the four luminous regions 30. Further, the rectangular region M includes the points where the four luminous regions 30 overlap.

[0035] The light source 2 is a component that emits light, and can be appropriately selected from devices known in the field, such as the self-emitting light-emitting element 21 itself, or a light-emitting device (also known as an LED) equipped with the light-emitting element 21.

[0036] For example, as light source 2, such as Figure 2 As shown, a light source can be provided that includes a lead wire 24, a light-emitting element 21, a first light-transmitting component 22, and a light-shielding component 23. The periphery of the light-emitting element 21 can also be covered by a second light-transmitting component 25. The light source 2 can have one light-emitting element 21 or multiple light-emitting elements 21. Furthermore, as the light source 2, it can also be configured to cover the exposed portion of the substrate, i.e., the opening of the dividing component, around the light-emitting element 21. The second light-transmitting component 25 can also include a wavelength conversion component. The wavelength conversion component can use a phosphor known in the art, such as the phosphor described in International Publication No. 2022 / 196300.

[0037] The thickness of the light source 2 relative to the upper surface of the substrate 1 can be set to 0.5 mm or more and 2.0 mm or less. In addition, when viewed from above in the Z direction, the thickness of one side of the light source 2 can be set to 0.25 mm or more and 5.0 mm or less.

[0038] To reduce brightness unevenness in each light-emitting region 30 of the dividing component 3, the light source 2 is preferably equipped with a wide light distribution. It is particularly preferable that each light source 2 has a batwing light distribution characteristic. This reduces the amount of light emitted directly above the light source 2, expands the light distribution of each light source 2, and directs the expanded light onto the first sidewall 42, second sidewall 43, third sidewall 52, fourth sidewall 53, and bottom 31 of the dividing component (described later), thereby reducing brightness or color unevenness in each light-emitting region 30. Here, the batwing light distribution characteristic is defined as: with the optical axis OA set to 0 degrees, a light intensity distribution stronger than 0 degrees at angles where the absolute value of the light distribution angle is greater than 0 degrees. Figure 2 As shown, the optical axis OA is defined by a line passing through the center of the light source 2 and intersecting perpendicularly with the upper surface of the substrate 1. Specifically, the light source 2, as having batwing-wing light distribution characteristics, is, for example, as... Figure 2 As shown, a light source with a light-shielding component 23 on its upper surface can be cited as an example. Because the light source 2 has a light-shielding component 23, most of the upward-directed light from the light source 2 is reflected by the light-shielding component 23, reducing the amount of light directly above the light-emitting element 21, thus achieving batwing light distribution characteristics. The light source 2 can also be combined with a lens to achieve batwing light distribution.

[0039] The light-shielding component 23 can be made of metal films such as silver and copper, materials containing light-diffusing fillers in the resin, dielectric multilayer films (DBR films), or combinations thereof. The reflectivity of the light-shielding component 23 can also be set to be lower for oblique incidence than for perpendicular incidence.

[0040] In a light source module, preferably multiple light sources 2 can be driven independently of each other and are wired on the substrate 1 in a manner that allows for dimming control of each light source 2 (e.g., local dimming or high dynamic range).

[0041] (Light-emitting element 21)

[0042] As the light-emitting element 21, known light-emitting elements can be used. For example, a light-emitting diode (LED) is preferably used as the light-emitting element 21. The light-emitting element 21 can be selected from elements capable of emitting light of any wavelength. For example, light-emitting elements using nitride-based semiconductors such as GaN, InGaN, AlGaN, and AlInGaN can be used as light-emitting elements capable of emitting blue or green light. Light-emitting elements using GaAlAs, AlInGaP, etc., can be used as light-emitting elements capable of emitting red light. Semiconductor light-emitting elements made of materials other than these can also be used. The composition, emission wavelength, emission color, shape, size, and number of the light-emitting elements used can be appropriately selected according to the purpose.

[0043] The light-emitting element 21 can be exemplified by a flip-chip mounting structure on the lead 24 via a bonding member. However, the light-emitting element 21 may also have a surface mounted opposite to the electrode. The bonding member is a component used to bond the light-emitting element 21 to a substrate or conductor wiring, and examples include insulating resins or conductive components. Figure 2 In the case of flip-chip mounting, conductive components are used. Specifically, examples include alloys containing Au, Ag, Pd, In, Pb-Pd, Au-Ga, Au-Sn, Sn, Sn-Cu, Sn-Cu-Ag, Au-Ge, Au-Si, Al, Cu-In, and mixtures of metals and flux.

[0044] (First light-transmitting component 22, second light-transmitting component 25)

[0045] The first light-transmitting component 22 and the second light-transmitting component 25 (hereinafter, in the context of the common description, sometimes referred to as light-transmitting components 22 and 25) both protect the light-emitting element 21 from the influence of the external environment and optically control the light emitted from the light-emitting element 21. For example, they cover the light-emitting element 21 for purposes such as obtaining the light distribution characteristics of bat wings. The light-transmitting components 22 and 25 are made of light-transmitting materials. As materials for the light-transmitting components 22 and 25, light-transmitting resins such as epoxy resin, silicone resin, or resins mixed from them, and glass can be used. Among these, silicone resin is preferred considering light resistance and ease of molding. The light-transmitting components 22 and 25 may also contain a diffusing agent for diffusing light from the light-emitting element 21. The second light-transmitting component 25 preferably includes a wavelength conversion component, etc.

[0046] The light-transmitting components 22 and 25 are adjusted to a viscosity suitable for printing, dispensing, coating, etc., and can be cured by heat treatment or light irradiation.

[0047] (Light-shielding component 23)

[0048] The light-shielding member 23 covers the upper surface of the light-emitting element 21, preferably only a portion of the upper surface of the light-emitting element 21. The light-shielding member 23 has an upper surface, which may be larger or smaller than the upper surface of the light-emitting element 21. The light-shielding member 23 can be formed from resin or glass, as exemplified in the first light-transmitting member 22, or from light-reflective materials. Materials known in the art can be used as light-reflective materials. Examples of resins include those exemplified by the sealing member. Alternatively, the light-shielding member 23 may not be provided.

[0049] (Divided into 3 parts)

[0050] like Figure 2 , Figure 3 as well as Figure 4 As shown, the dividing component 3 has a wall portion 60 divided into light-emitting areas 30, each containing a plurality of light sources 2.

[0051] The wall portion 60 has a plurality of first wall portions 40 and a plurality of second wall portions 50 intersecting the first wall portions. These first wall portions 40 and second wall portions 50 define a plurality of light-emitting regions 30 for respectively arranging a plurality of light sources 2. In other words, each of the plurality of light sources 2 is arranged in a region surrounded by a pair of first wall portions 40 and a pair of second wall portions 50. Each light-emitting region 30 is surrounded by a pair of first wall portions 40 and a pair of second wall portions 50.

[0052] The dividing member 3 has a wall portion 60, and each light-emitting area 30 has a bottom portion 31, etc. The bottom portion 31 is arranged continuously from the wall portion 60. That is, the bottom portion 31 is connected to the first wall portion 40 and the second wall portion 50. The bottom portion 31 has an opening 32 for arranging the light source 2 at its center or center of gravity.

[0053] The plurality of first wall portions 40 are preferably arranged in a non-intersecting manner, and some of them may be arranged parallel to each other or not parallel to each other. The plurality of second wall portions 50 are preferably arranged in a non-intersecting manner, and some of them may be arranged parallel to each other or not parallel to each other.

[0054] The plurality of first wall portions 40 and the plurality of second wall portions 50 can be formed from straight lines, curves, and combinations thereof when viewed from above. In this case, the first wall portions 40 and / or the second wall portions 50 may also be formed, for each luminous area 30, from straight lines (i.e., broken lines) and curves different from those of the straight lines and curves of the designated adjacent luminous areas (see reference). Figure 3 as well as Figure 6 ).

[0055] The first wall portion 40 extends in a direction offset from the first direction within a range of ±45° in the first direction (X direction). A portion of the first wall portion 40 may be aligned with the first direction (X direction), but preferably the other portion or all of it extends in a direction offset from the first direction.

[0056] The first wall portion 40 has a first ridge line 41, a first sidewall 42, and a second sidewall 43. The first sidewall 42 and the second sidewall 43 are positioned across the first ridge line 41 when viewed from above. The first sidewall 42 and the second sidewall 43 are respectively arranged to divide adjacent light-emitting areas 30. The first ridge line 41 is the line connecting the highest point of the first wall portion 40. When viewed in cross-section in a direction orthogonal to the first ridge line 41, the first ridge line 41 can be either sharp or rounded. The first ridge line 41 can also be a rectangular shape extending from a flat portion with an extremely narrow width. The width of this flat portion can be, for example, less than 1 mm. The first ridge line 41 can have a widened portion, but it is preferably substantially a constant width.

[0057] The second wall portion 50 extends in a direction intersecting the first wall portion 40, i.e., the first ridge line 41. In other words, the second wall portion 50 extends in a direction offset from the second direction (Y direction) within a range of ±45°. A portion of the second wall portion 50 may be aligned with the second direction (Y direction), but preferably, the remaining portion or all of it extends in a direction offset from the second direction. The second wall portion 50 has a second ridge line 51, a third sidewall 52, and a fourth sidewall 53. The third sidewall 52 and the fourth sidewall 53 are arranged across the second ridge line 51 when viewed from above. The third sidewall 52 and the fourth sidewall 53 are arranged to divide adjacent light-emitting areas 30. The second ridge line 51 is the line connecting the highest point of the second wall portion 50. When viewed in cross-section in a direction orthogonal to the second ridge line 51, the second ridge line 51 can be either a sharp shape or a shape with rounded corners. The second ridge line 51 can also be a shape in which a flat portion with a very narrow width extends in a rectangular shape. The width of the flat portion here can be, for example, less than 1 mm. The second ridge 51 may have a widened portion, but it is preferred to have a substantially constant width.

[0058] exist Figure 3In the dividing component 3, the direction in which the first ridge line 41 extends is not the same as the X direction. For each light-emitting area 30, it extends in a direction offset from the X direction within a range of ±45° in the X direction. The extension direction of the first ridge line 41 may be consistent with a portion of the multiple light-emitting areas 30, preferably partially or completely different. Similarly, the direction in which the second ridge line 51 extends is not the same as the Y direction. For each light-emitting area 30, it extends in a direction offset from the Y direction within a range of ±45° in the Y direction. The extension direction of the second ridge line 51 may be consistent with a portion of the multiple light-emitting areas 30, preferably partially or completely different. Examples of such offset directions include the angle at which the first ridge line 41 intersects with the first line X1 and / or the angle at which the second ridge line 51 intersects with the second line Y2, which is greater than 0° and less than 45°, preferably 0.2° or more and 20° or less, more preferably 0.3° or more and 15° or less, and even more preferably 0.4° or more and 12° or less.

[0059] In other words, in a rectangular region M where four grid points form corners, the total length of the first edge 41 extending in a direction offset from the X direction within a range of ±45° in the X direction is longer than the length of the first line X1, i.e., the length between adjacent grid points in the X direction. Similarly, in a rectangular region, the total length of the second edge 51 extending in a direction offset from the Y direction within a range of ±45° in the Y direction is longer than the length of the second line Y2, i.e., the length between adjacent grid points in the Y direction.

[0060] In other words, the total length of the walls of a predetermined number n adjacent luminous regions in the first direction is longer than a predetermined number n times the distance between grid points in the first direction. Similarly, the total length of the walls of a predetermined number m adjacent luminous regions in the second direction is longer than a predetermined number m times the distance between grid points in the second direction.

[0061] Regarding the difference in length, examples can be made where, within a rectangular region, the total length of the first edge 41 is greater than 1 times the length of the first line X1, preferably 1.003 times or more, more preferably 1.0035 times or more, and even more preferably 1.005 times or more. Examples of such length differences include less than 1.1 times, preferably less than 1.05 times, and even more preferably less than 1.035 times. Similarly, within a rectangular region, examples can be made where the total length of the second edge 51 is greater than 1 times the length of the second line Y2, preferably 1.003 times or more, more preferably 1.0035 times or more, and even more preferably more than 1.005 times. Examples of such length differences include less than 1.1 times, preferably less than 1.05 times, and even more preferably less than 1.035 times.

[0062] When viewed from above, the luminescent area 30 is the area surrounded by the wall portion 60. That is, the luminescent area 30 is the area surrounded by a pair of first wall portions 40 and a pair of second wall portions 50. In other words, the luminescent area 30 is the area surrounded by the first ridge line 41 and the second ridge line 51.

[0063] exist Figure 1 In this configuration, multiple light-emitting regions 30 are arranged in a first direction and a second direction. The number of light-emitting regions 30 can be the same or different in the first and second directions. Furthermore, the number of light-emitting regions 30 can be the same or different in each of the first and second directions.

[0064] Each light-emitting region 30 includes two opposing first walls 40, two opposing second walls 50, and a bottom 31. The shape and size of the bottom 31 of a light-emitting region can be appropriately set according to the light-emitting element used, the desired size of the light source module, etc. The shape of the bottom 31, for example, is a quadrilateral, a rhombus, or a shape similar to them when viewed from above. The shape of the bottom 31 of each light-emitting region 30 can be partially or entirely the same, or partially or entirely different. In each light-emitting region 30, the outer edge of the bottom 31 is surrounded clockwise by the second sidewall 43, the fourth sidewall 53, the first sidewall 42, and the third sidewall 52. In other words, the outer edge of the bottom 31 is connected to the lower ends of the second sidewall 43, the fourth sidewall 53, the first sidewall 42, and the third sidewall 52. In other words, the second sidewall 43, the fourth sidewall 53, the first sidewall 42, and the third sidewall 52 surround the bottom 31 in a frame-like configuration when viewed from above, thereby dividing the light-emitting region.

[0065] As described above, the intersection point Q of the wall portions 60 dividing the four adjacent light-emitting areas 30 is arranged within a rectangular area M. The intersection point Q of the wall portions 60 refers to the point where the two first wall portions 40 intersect with the two second wall portions 50. Specifically, it is the point where the two first ridge lines 41 intersect with the two second ridge lines 51. In this case, the first ridge lines 41 and the second ridge lines 51, as described above, can have a point-like intersection point as long as they are sharp, have rounded corners, or have a flat portion with a width of less than 1 mm that extends in a rectangular shape. A point-like intersection point is, for example, any area where the intersection point Q is less than 1 mm², preferably less than 0.5 mm². This intersection point Q is far from the center of the rectangular area M, that is, it is not aligned with the center of the rectangular area M. Therefore, even if thermal shrinkage occurs in the dividing component due to high temperature conditions, the wall portions 60, i.e., the broken lines or curves of the ridge lines, can interrupt the deformation caused by thermal shrinkage, thereby mitigating the positional shift of the wall portions 60 relative to the light source. As a result, it can reduce the occurrence of uneven brightness or uneven color.

[0066] The first sidewall 42, the second sidewall 43, the third sidewall 52, and the fourth sidewall 53 are inclined relative to the bottom 31. In each light-emitting region 30, the distance in the second direction Y between the regions sandwiched by the opposing first sidewall 42 and second sidewall 43 is narrower towards the bottom 31 and wider towards the top. Similarly, as... Figure 4 As shown, in each light-emitting region 30, in the region sandwiched between the opposing third sidewall 52 and fourth sidewall 53, the distance S in the first direction on the bottom 31 side is narrower than the distance T in the first direction on the upper side.

[0067] In other words, the wall portion 60 is inclined such that the distance between the first sidewall 42 and the second sidewall 43, which are opposite each other in the light-emitting area, increases as it moves away from the substrate 1. Furthermore, the light source module has a space surrounded by two sidewalls opposite each other across an edge and the upper surface of the substrate. Specifically, as... Figure 2 As shown, a space K is provided between the first sidewall 42, the second sidewall 43, and the upper surface of the substrate 1. The angle α formed by the first sidewall 42 and the second sidewall 43 can be 15 degrees or more and 45 degrees or less. The smaller of the angles β1 and β2 between the first sidewall 42 or the second sidewall 43 and the upper surface of the substrate 1 is... Figure 2 (In the middle) can be less than 90 degrees and greater than 50 degrees. β1 and β2 can be different or the same. Similar to the first sidewall 42 and the second sidewall 43, there is a space K between the third sidewall 52, the fourth sidewall 53 and the upper surface of the substrate 1. The angles formed by the third sidewall 52 and the fourth sidewall 53, and the smaller of the angles between the third sidewall 52 and the fourth sidewall 53 and the upper surface of the substrate 1, can be listed as follows: Figure 2 The angles α, β1, and β2 are the same. By setting the angles α, β1, and β2 within this range, the space and area occupied by the dividing component can be reduced. By reducing the height of the dividing component 3, the light source module can be made thinner. In addition, the height H of the dividing component 3 itself ( Figure 2 (middle), that is, the length in the Z direction from the lower surface of each bottom 31 of the dividing component 3 to the first ridge 41 or the second ridge 51 ( Figure 2 The thickness of H is preferably 8mm or less, and when the light source module is made thinner, it is preferably 1mm or more and 4mm or less.

[0068] The bottom 31 has an opening 32. The opening 32 is an area used to configure the light source when the dividing member 3 is used in the light source module. The size of the opening 32 can be appropriately set according to the light-emitting element used, the desired size of the light source module, etc. The opening 32 is, for example, located in the center of the bottom 31, and preferably does not reach the lower ends of the first sidewall 42, the second sidewall 43, the third sidewall 52, and the fourth sidewall 53. When viewed from above, the area of ​​the opening 32 is smaller than the area of ​​the bottom 31. The opening 32 is, for example, circular when viewed from above.

[0069] When viewed in cross-section through the center of the bottom 31 in the second direction Y, the shape of the first wall portion 40, including the first ridge 41, the first sidewall 42, and the second sidewall 43, is preferably a V-shape that opens downwards. Similarly, as Figure 2 As shown, when viewed in cross-section through the center of the bottom 31 in the first direction X, the shape of the second wall portion 50, including the second ridge 51, the third sidewall 52, and the fourth sidewall 53, is preferably a V-shape that opens downwards.

[0070] The shape of the dividing component can be set to various shapes, such as a rectangle, when viewed from above, or it can be an irregular shape other than a rectangle when viewed from above. Irregular shapes can be, for example, shapes that are partially or entirely deformed from a complete rectangle to match a specific product shape. The outer perimeter of the dividing component can be composed of only multiple straight lines, or it can include curves.

[0071] The first wall portion 40 located at the outer edge of the dividing member 3 may or may not have a second sidewall 43. In this case, the first ridge line 41 located at the outer edge of the dividing member 3 is located at the upper end of the first sidewall 42. Similarly, the first wall portion 40 located at the outer edge of the dividing member 3 may or may not have a first sidewall 42. In this case, the first ridge line 41 located at the outer edge of the dividing member 3 is located at the upper end of the second sidewall 43.

[0072] The second wall portion 50 located at the outer edge of the dividing member 3 may or may not have a fourth side wall 53. In this case, the second ridge line 51 located at the outer edge of the dividing member 3 is located at the upper end of the third side wall 52. Similarly, the second wall portion 50 located at the outer edge of the dividing member 3 may or may not have a third side wall 52. In this case, the second ridge line 51 located at the outer edge of the dividing member 3 is located at the upper end of the fourth side wall 53.

[0073] exist Figure 3 In the example shown, the first ridge 41 and / or the second ridge 51 are continuous without any cuts. However, the dividing member 3 may also have a cut at the intersection of the first ridge 41 and the second ridge 51 when viewed from above, as disclosed in Japanese Patent Application Publication No. 2022-191132, on a portion of the first ridge 41 and / or the second ridge 51. Therefore, when the dividing member 3 is used in the light source module described later, it is possible to further reduce the occurrence of uneven brightness or uneven color due to thermal shrinkage of the dividing member.

[0074] In a light source module where the dividing component 3 is disposed on the substrate 1 and the light source 2 is disposed on the substrate 1 exposed in each opening 32, the dividing component 3 may be subjected to thermal load during storage in a high-temperature environment or during the driving of the light source, which may cause thermal shrinkage in the dividing component 3.

[0075] In this case, when the intersection of the first wall portion 40 and the second wall portion 50 in the dividing component 3 is shaped to be offset from the center of the rectangular area, in other words, when the first ridge line 41 and the second ridge line 51 are respectively shaped to be not arranged in a straight line, the heat load on the parts that are subjected to the maximum load due to heat shrinkage and forming, namely the first ridge line 41, the second ridge line 51 and their intersection, can be mitigated, thereby reducing undesirable deformation of the dividing component and reducing the occurrence of uneven brightness or uneven color.

[0076] In other words, if a thermal load is applied to the dividing component 3, the dividing component 3 will shrink towards the center. The larger the size of the dividing component when viewed from above, the greater the shrinkage of the dividing component. When the dividing component shrinks due to the thermal load, the distances from the light source to the first sidewall 42, the second sidewall 43, the third sidewall 52, and the fourth sidewall 53 in each light-emitting region 30 sometimes change. As a result, the direction of light reflection changes, causing uneven brightness or uneven color in the light source module.

[0077] As described above, in the dividing component, by shaping the intersection of the walls away from the center of the rectangular area, the deformation caused by thermal shrinkage of the wall portion 60, including the first wall portion 42 and the second wall portion 43, between each light-emitting area is substantially interrupted, thus allowing the wall portion to shrink under thermal load in each light-emitting area. Therefore, when observing the dividing component 3 as a whole, the shrinkage of the dividing component 3 towards the center can be reduced. As a result, in each light-emitting area 30, the variation in distance from the light source to the first side wall 42, the second side wall 43, the third side wall 52, and the fourth side wall 53 can be reduced. Consequently, the change in the direction of light reflection in the dividing component 3 can be reduced, and the occurrence of brightness or color unevenness in the light source module can be reduced.

[0078] The dividing component 3 is disposed on the substrate 1 directly or indirectly using adhesive components, thereby forming a light source module. The adhesive components can be, for example, double-sided tape with acrylic resin adhesive applied to both sides of a PET substrate, hot-melt adhesive sheets, or resin-based adhesives such as thermosetting resins or thermoplastic resins. These adhesive components preferably have high flame retardancy.

[0079] The dividing member 3 preferably uses a light-reflective adhesive member to join the periphery of each opening 32 so that the emitted light from the light source 2 does not enter between the substrate 1 and the dividing member 3. For example, it is more preferable to arrange the light-reflective adhesive member in a ring shape along the outer edge of each opening 32.

[0080] The dividing component 3 can be formed using molding methods such as die molding or light-based molding. For example, by stamping a resin sheet with a thickness of 0.2 mm or more and 0.3 mm or less using a die, it can be formed into a shape having a first wall portion 40, a second wall portion 50, and a bottom portion 31. Furthermore, as molding methods using a die, injection molding, extrusion molding, compression molding, vacuum molding, and other molding methods can be applied. Thus, a dividing component 3 in which the first wall portion 40, the second wall portion 50, and the bottom portion 31 are integrally formed can be obtained.

[0081] The dividing component 3 can be formed from thermoplastic resins such as acrylic resin, polycarbonate resin, cyclic polyolefin resin, polyethylene terephthalate, polyethylene naphthalate, or polyester, or thermosetting resins such as epoxy resin or silicone resin. The dividing component 3 uses a light-reflective component. Therefore, the dividing component 3 can be formed using a resin containing reflective materials such as titanium dioxide, aluminum oxide, or silicon dioxide particles, or it can be formed using a resin without reflective materials and then have a reflective film applied to its surface. Alternatively, a resin containing multiple microbubbles can be used. In this case, light is reflected at the interface between the bubbles and the resin. The dividing component 3 is preferably configured to have a reflectivity of 70% or higher for light emitted from the light source 2. Thus, the light emitted from the light source 2 can be efficiently reflected upwards using the first sidewall 42, second sidewall 43, third sidewall 52, fourth sidewall 53, and bottom 31. That is, the dividing component 3 can be used as a reflector for the light source module.

[0082] Variation Example 1

[0083] Figure 1 The light source module 10 shown has the light source 2 arranged within the opening 32 of the dividing member 3, with one side of the light source 2 parallel to the first line X1 and / or the second line Y2 in the rectangular grid. On the other hand, as... Figure 5 As shown, in the light source module 10A, the light source 2 can also be arranged in the opening 32 of the dividing member 3 in such a way that one side of the light-emitting element in the light source 2 is inclined relative to the first line X1 and / or the second line Y2 in the rectangular grid, for example, in a 45-degree intersection.

[0084] Variation Example 2

[0085] exist Figure 1In the light source module 10 shown, the first wall portion 40 and the second wall portion 50 in the dividing member 3 are respectively straight lines in each light-emitting region 30, and are arranged in a broken line shape in the ridge line continuous with two adjacent light-emitting regions 30. On the other hand, as Figure 6 As shown, the first wall portion 40A and the second wall portion 50A in the dividing component 3A are curved in one light-emitting area 30A, and can also be configured to be curved in adjacent light-emitting areas 30. That is, the first ridge line 41A and the second ridge line 51A are curved in one light-emitting area 30A, and can also be configured to be curved in adjacent light-emitting areas 30.

[0086] Variation Example 3

[0087] As Figure 1 The light source in the light source module 10 shown can, for example, also use... Figure 7 The light source 2B shown is a light-emitting element 73; a light-transmitting component 74 covering the side and upper surface of the light-emitting element 73; a light-reflective wiring substrate 72 covering the lower surface of the light-emitting element 73 and the lower surface of the light-transmitting component 74; a light-adjusting component 75 covering the upper surface of the light-transmitting component 74, allowing a portion of the light from the light-emitting element 73 to pass through and a portion to be reflected; and a wiring 71 located on the lower surface of the light source 2B and electrically connected to the light-emitting element 73. It has a structure in which most of the light emitted from the light-emitting element 73 is emitted to the side. The light-transmitting component 74 may also include a wavelength conversion component and / or a light-diffusing component.

[0088] Variation Example 4

[0089] As Figure 1 The light source in the light source module 10 shown can, for example, also use... Figure 8 The light source 2C is shown. The light source 2C has positive and negative electrodes 82 on the lower surface of the light-emitting element 81, and a light-adjusting member 83 on the upper surface of the light-emitting element 81 that allows a portion of the light from the light-emitting element 81 to pass through and a portion to be reflected. The side surfaces of the light-emitting element 81, the side surfaces of the light-transmitting member 83, and the upper surface are covered by a light-transmitting sealing member 84. The sealing member 84 may also cover the lower surface of the light-emitting element 81 other than the lower surface of the electrodes 82. The sealing member 84 may also include a wavelength conversion member and / or a light diffusion member.

[0090] Second Implementation Method

[0091] like Figure 9 As shown, the light source module 10B of this embodiment has a substrate 1, a plurality of light sources 2 disposed on the substrate 1, and a dividing member 3B disposed on the substrate and having a wall portion 60B.

[0092] Multiple light sources 2 are respectively disposed on the grid points of a rectangular grid on the substrate 1. That is, the multiple light sources 2 are respectively disposed along the first direction (in Figure 9 Multiple first lines X1 extending from the X direction and along a second direction orthogonal to the first direction (in the middle) and the second direction orthogonal to the first direction (in the middle) Figure 9 On multiple grid points of a grid formed by multiple second lines Y2 extending from the middle (Y direction).

[0093] The dividing component 3B is divided into light-emitting areas 30B, each containing multiple light sources 2, and has a wall portion 60B, which has ridges 41B and 51B.

[0094] The four grid points that form the smallest rectangle become the rectangular region M at the corner, which includes four luminous regions 30B.

[0095] Substrate 1 and light source 2 are examples of the same substrate and light source as described above.

[0096] (Divided into component 3B)

[0097] The dividing component 3B is defined by the wall portion 60B as multiple light-emitting areas 30B, each equipped with multiple light sources 2.

[0098] It is stipulated that the total length of the walls of a specified number n adjacent luminous regions 30B in the first direction is longer than a specified number n times the distance between grid points in the first direction. Similarly, it is stipulated that the total length of the walls of a specified number m adjacent luminous regions 30B in the second direction is longer than a specified number m times the distance between grid points in the second direction.

[0099] The wall portion 60B has a plurality of first wall portions 40B and a plurality of second wall portions 50B intersecting with the first wall portions 40B. These first wall portions 40B and second wall portions 50B define a plurality of light-emitting regions 30B for respectively arranging a plurality of light sources 2.

[0100] The first wall portion 40B has a first ridge line 41B, a first sidewall 42B, and a second sidewall 43B. The first sidewall 42B and the second sidewall 43B are positioned across the first ridge line 41B when viewed from above. The first sidewall 42B and the second sidewall 43B are respectively configured to divide adjacent light-emitting areas 30B. The first ridge line 41B is a line connecting the highest point of the first wall portion 40B.

[0101] The second wall portion 50B has a second ridge line 51B, a third side wall 52B, and a fourth side wall 53B. The third side wall 52B and the fourth side wall 53B are positioned across the second ridge line 51B when viewed from above. The third side wall 52B and the fourth side wall 53B are arranged to divide adjacent light-emitting areas 30B. The second ridge line 51B is the line connecting the highest point of the second wall portion 50B.

[0102] The plurality of first wall portions 40B and the plurality of second wall portions 50B can each be configured into a shape formed by combining curves when viewed from above. Specifically, the first ridge line 41B and the second ridge line 51B can each be formed by combining curves when viewed from above.

[0103] The wall portion 60B, such as multiple first wall portions 40B and multiple second wall portions 50B, specifically the first edge line 41B and the second edge line 51B, preferably have the following characteristics: in a rectangular region M where four grid points form corners, the total length of the first edge line 41B is longer than the length of the first line X1, i.e., the length between adjacent grid points in the X direction, and the total length of the second edge line 51B is longer than the length of the second line Y2, i.e., the length between adjacent grid points in the Y direction. This difference in length can be illustrated by examples similar to those described above.

[0104] Each of the light-emitting areas 30B has a bottom 31B. The bottom 31B is arranged continuously from the wall portion, and has an opening 32B at or near the center or centroid of the bottom 31B. The shape of the bottom 31B can also be curved, depending on the shape of the wall portion.

[0105] When viewed from above, the center of the dividing member 3B with such a wall portion 60B coincides with the intersection of the wall portion of the dividing member 3B in the rectangular region M containing the four light-emitting areas 30B.

[0106] By arranging the wall portion 60B of the dividing component 3B in a curved shape when viewed from above, even if thermal shrinkage occurs in the dividing component due to high temperatures, the curve of the wall portion, i.e., the ridge line, can interrupt the deformation caused by thermal shrinkage, thereby mitigating the positional shift of the wall relative to the light source. This reduces the occurrence of uneven brightness or color.

[0107] Third Implementation Method

[0108] In this embodiment, such as Figure 10 As shown, a liquid crystal display device 90 having a backlight source utilizing a light source module is shown.

[0109] The liquid crystal display device 90 includes, from top to bottom, a liquid crystal panel 91, an optical sheet 92, and a light source module 10. The optical sheet 92 is, for example, a light diffuser. The light diffuser may include a light diffuser component. The light diffuser may also be plate-shaped.

[0110] Above the light source 2 in the light source module 10, a wavelength conversion plate, a prism sheet, or a polarizer may be provided instead of an optical sheet, or either above or below the optical sheet. Alternatively, an outer substrate with a reflective wall surrounding the outer periphery of the substrate 1, or a cover substrate with a reflective wall surrounding the outer periphery of the reflective component may be provided at either above or below the light source module 10. These can be laminated onto the light source module 10 via an adhesive layer and / or a reflective layer. These optical sheets, diffuser plates and / or diffusers, wavelength conversion plates, prism sheets, polarizers, outer substrates, cover substrates, adhesive layers, and / or reflective layers can utilize materials known in the art.

[0111] The liquid crystal display device 90 with this structure uses the light source module 10 as a surface-emitting direct-lit backlight source.

[0112] In this embodiment, the light source module can be used as a backlight for a liquid crystal display device. The light source module can also be used as a light source for general lighting, emergency lights and / or linear lighting, various types of lighting, and for vehicle mounting, etc.

[0113] This specification discloses the following technical matters.

[0114] (Note 1)

[0115] A light source module includes: a substrate; a plurality of light sources disposed on the substrate and respectively disposed on grid points of a rectangular grid; a dividing member disposed on the substrate and dividing the light-emitting area of ​​each of the plurality of light sources, and having a wall portion having ridges, wherein four light-emitting areas are contained in a rectangular area where the four grid points forming the corners of the smallest rectangle, and the intersection of the ridges of the wall portion is away from the center of the rectangular area.

[0116] (Note 2)

[0117] According to the light source module described in Appendix 1, the wall portion has a plurality of first wall portions and a plurality of second wall portions intersecting the first wall portions, each of the plurality of light sources being configured in an area surrounded by a pair of first wall portions and a pair of second wall portions.

[0118] (Note 3)

[0119] According to Appendix 1 or 2, the light source module has a bottom surface that is continuous from the wall and has an opening in which a light source is disposed.

[0120] (Note 4)

[0121] According to any one of Appendices 1 to 3, the light source module wherein the wall portion is inclined such that the area surrounding the light source increases in size as it moves away from the substrate.

[0122] (Note 5)

[0123] According to any one of Appendices 1 to 4, the light source module has a ridge and two sidewalls opposite each other across the ridge.

[0124] (Note 6)

[0125] According to any one of Appendices 1 to 5, the light source module has a space surrounded by the two sidewalls opposite each other across the ridge and the upper surface of the substrate.

[0126] (Note 7)

[0127] According to any one of Appendices 1 to 6, the light source module wherein the dividing component is light reflective.

[0128] (Note 8)

[0129] According to any one of Appendices 1 to 7, the light source module further comprises a light diffuser above the dividing component.

[0130] (Note 9)

[0131] A light source module includes: a substrate; a plurality of light sources disposed on the substrate; and a dividing member disposed on the substrate, having a wall portion. The plurality of light sources are respectively disposed on a plurality of grid points of a grid formed by a plurality of first lines extending in a first direction and a plurality of second lines extending in a second direction perpendicular to the first direction. The dividing member is defined by the wall portion as a plurality of light-emitting regions of the plurality of light sources respectively disposed thereon. The total length of the wall portion of a predetermined number n of adjacent light-emitting regions in the first direction is longer than a predetermined number n times the distance between grid points in the first direction.

[0132] (Postscript 10)

[0133] According to the light source module described in Appendix 9, the total length of the wall portion of a specified number m adjacent light-emitting areas in the second direction is longer than the specified number m times the distance between grid points in the second direction.

[0134] (Postscript 11)

[0135] According to the light source module described in Appendix 9 or 10, the wall portion has a second ridge between adjacent light-emitting areas in the first direction and a first ridge between adjacent dividing areas in the second direction.

[0136] (Postscript 12)

[0137] According to the light source module described in Appendix 11, when viewed from above, in a rectangular area surrounded by four adjacent grid points in the first or second direction, the intersection of the first edge and the second edge is far from the midpoint of the rectangular area.

[0138] Explanation of reference numerals in the attached figures

[0139] 1: Substrate

[0140] 2, 2B, 2C: Light source

[0141] 3, 3A, 3B: Component division

[0142] 10, 10A, 10B: Light source modules

[0143] 11: Substrate

[0144] 12: Conductor wiring

[0145] 13: Covering components

[0146] 21: Light-emitting element

[0147] 22: First light-transmitting component

[0148] 23: Light-shielding components

[0149] 24: Lead wire

[0150] 25: Second light-transmitting component

[0151] 30, 30A, 30B: Emitting areas

[0152] 31: Bottom

[0153] 32: Opening

[0154] 40, 40A, 40B: First wall section

[0155] 41, 41A, 41B: First edge line

[0156] 42, 42B: First sidewall

[0157] 43, 43B: Second sidewall

[0158] 50, 50A, 50B: Second wall section

[0159] 51, 51A, 51B: Second ridge line

[0160] 52, 52B: Third sidewall

[0161] 53, 53B: Fourth sidewall

[0162] 60, 60B: Wall section

[0163] 71: Wiring

[0164] 72: Wiring board

[0165] 73: Light-emitting element

[0166] 74: Transparent components

[0167] 75: Light adjustment component

[0168] 81: Light-emitting element

[0169] 82: Electrode

[0170] 83: Light adjustment component

[0171] 84: Sealing components

[0172] 90: Liquid crystal display device

[0173] 91: LCD panel

[0174] 92: Optical film

[0175] H: Height

[0176] K: Space

[0177] M: Rectangular area

[0178] OA: Optical Axis

[0179] Q: Intersection

[0180] S, T: Distance

[0181] X: First direction

[0182] X1: First Line

[0183] Y: Second direction

[0184] Y2: Second Line

[0185] α, β1, β2: Angles

Claims

1. A light source module, characterized in that, have: substrate; Multiple light sources are disposed on the substrate and respectively disposed on the grid points of a rectangular grid on the substrate; A dividing component, disposed on the substrate, is divided according to the light-emitting area of ​​each of the plurality of light sources, and has a wall portion having ridges. The rectangular region formed by the four grid points constituting the smallest rectangle, which become the corners, contains four luminous areas. The intersection of the edges of the wall portion is far from the center of the rectangular region.

2. The light source module according to claim 1, characterized in that, The wall portion has a plurality of first wall portions and a plurality of second wall portions intersecting the first wall portions, each of the plurality of light sources being configured in a region surrounded by a pair of first wall portions and a pair of second wall portions.

3. The light source module according to claim 1, characterized in that, The dividing component has a bottom surface that is continuous from the wall and has an opening, in which a light source is disposed.

4. The light source module according to claim 1, characterized in that, The wall is inclined such that the area surrounding the light source increases in size as it moves away from the substrate.

5. The light source module according to claim 1, characterized in that, The wall portion has a ridge and two sidewalls opposite each other across the ridge.

6. The light source module according to claim 1, characterized in that, The wall portion has a space surrounded by the two sidewalls opposite each other across the ridge and the upper surface of the substrate.

7. The light source module according to claim 1, characterized in that, The dividing component is light reflective.

8. The light source module according to claim 1, characterized in that, A light diffuser is also provided on the dividing component.

9. A light source module, characterized in that, have: substrate; Multiple light sources are disposed on the substrate; Dividing components, disposed on the substrate, have walls. The plurality of light sources are respectively disposed on a plurality of grid points of a grid formed by a plurality of first lines extending in a first direction and a plurality of second lines extending in a second direction perpendicular to the first direction. The dividing component is defined by the wall portion as multiple light-emitting areas respectively equipped with the plurality of light sources. The total length of the wall portion of a specified number n adjacent luminous regions in the first direction is longer than the specified number n times the distance between grid points in the first direction.

10. The light source module according to claim 9, characterized in that, The total length of the wall portion of the specified number m adjacent light-emitting areas in the second direction is longer than the specified number m times the distance between grid points in the second direction.

11. The light source module according to claim 9 or 10, characterized in that, The wall portion has a second ridge between adjacent light-emitting areas in the first direction and a first ridge between adjacent partitioned areas in the second direction.

12. The light source module according to claim 11, characterized in that, When viewed from above, in a rectangular region surrounded by four adjacent grid points in the first or second direction, the intersection of the first edge and the second edge is far from the midpoint of the rectangular region.

13. A light source module, characterized in that, have: substrate; Multiple light sources are disposed on the substrate and respectively disposed on the grid points of a rectangular grid on the substrate; A dividing component, disposed on the substrate, is divided according to the light-emitting area of ​​each of the plurality of light sources, and has a wall portion having ridges. The rectangular region formed by the four grid points constituting the smallest rectangle, which become the corners, contains four luminous areas. The intersection of the edges of the wall portion is far from the center of the rectangular region. The wall portion has a plurality of first wall portions and a plurality of second wall portions intersecting the first wall portions, each of the plurality of light sources being configured in a region surrounded by a pair of first wall portions and a pair of second wall portions. The dividing component has a bottom surface that is continuous from the wall portion and has an opening, within which a light source is disposed. The wall is inclined in such a way that the area surrounding the light source increases in size as it moves away from the substrate. The wall portion has a ridge and two sidewalls opposite each other across the ridge.

14. The light source module according to claim 13, characterized in that, The dividing component is light reflective.

15. The light source module according to claim 14, characterized in that, A light diffuser is also provided on the dividing component.

16. A light source module, characterized in that, have: substrate; Multiple light sources are disposed on the substrate; Dividing components, disposed on the substrate, have walls. The plurality of light sources are respectively disposed on a plurality of grid points of a grid formed by a plurality of first lines extending in a first direction and a plurality of second lines extending in a second direction perpendicular to the first direction. The dividing component is defined by the wall portion as multiple light-emitting areas respectively equipped with the plurality of light sources. The total length of the wall portions of a specified number n adjacent light-emitting regions in the first direction is longer than a specified number n times the distance between grid points in the first direction. The total length of the wall portion of a specified number m adjacent luminous areas in the second direction is longer than the specified number m times the distance between grid points in the second direction. The wall portion has a second ridge between adjacent light-emitting areas in the first direction and a first ridge between adjacent dividing areas in the second direction.

17. The light source module according to claim 16, characterized in that, When viewed from above, in a rectangular region surrounded by four adjacent grid points in the first or second direction, the intersection of the first edge and the second edge is far from the midpoint of the rectangular region.

18. A light source module, characterized in that, have: substrate; Multiple light sources are disposed on the substrate; Dividing components, disposed on the substrate, have walls. The plurality of light sources are respectively disposed on a plurality of grid points of a grid formed by a plurality of first lines extending in a first direction and a plurality of second lines extending in a second direction perpendicular to the first direction. The dividing component is defined by the wall portion as multiple light-emitting areas respectively equipped with the plurality of light sources. The total length of the wall portions of a specified number n adjacent light-emitting regions in the first direction is longer than a specified number n times the distance between grid points in the first direction. The wall portion has a second ridge line between adjacent light-emitting areas in the first direction, and a first ridge line between adjacent dividing areas in the second direction. When viewed from above, in a rectangular region surrounded by four adjacent grid points in the first or second direction, the intersection of the first edge and the second edge is far from the midpoint of the rectangular region.

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