Light-emitting device and display device

Abstract

To provide a light-emitting device that prevents water from accumulating on the lens surface. [Solution] A light-emitting device comprising a support having a first surface and a second surface located opposite the first surface, a first light-emitting element and a second light-emitting element located on the first surface side of the support and arranged in this order in a first direction, and a covering member covering the first light-emitting element and the second light-emitting element, wherein the covering member has a base portion that overlaps the first light-emitting element and the second light-emitting element in a plan view from the first surface side, a first lens portion located on the base portion and overlapping the first light-emitting element in a plan view, a second lens portion located on the base portion and overlapping the second light-emitting element in a plan view, and a convex portion located on the base portion and lower than the height of the first lens portion and the second lens portion respectively, and having a height of 10 μm or more, wherein part or all of the convex portion is located between the first lens portion and the second lens portion in a plan view.

Description

Technical Field

[0001] This disclosure relates to a light-emitting device and a display device.

Background Art

[0002] As a light-emitting device having a semiconductor light-emitting element, such as a light-emitting diode (LED) light-emitting device, a bullet-type (lamp-type) light-emitting device, a surface-mount type (SMD-type) light-emitting device, etc. are known. A light-emitting device having high light distribution in the front direction is used, for example, in a large display device in which light-emitting devices are arranged in a matrix as pixels, such as an LED display. For example, Patent Document 1 discloses an example of a surface-mount type light-emitting device having a plurality of lenses on the light-emitting surface side. This light-emitting device can be used for a display device installed outdoors.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Depending on the usage environment, such as outdoors where it rains, water may adhere to the surface of the light-emitting device. When water adheres to the surface of the lens, the light distribution characteristics of the light-emitting device may change due to the influence of the water. Therefore, a light-emitting device in which water hardly accumulates on the surface of the lens is required.

Means for Solving the Problems

[0005] A light-emitting device according to one embodiment of the present disclosure comprises a support having a first surface and a second surface located opposite to the first surface; a first light-emitting element and a second light-emitting element located on the first surface side of the support and arranged in this order in a first direction; and a covering member covering the first light-emitting element and the second light-emitting element, wherein the covering member has a base portion that overlaps the first light-emitting element and the second light-emitting element in a plan view as seen from the first surface side; a first lens portion located on the base portion and overlapping the first light-emitting element in a plan view; a second lens portion located on the base portion and overlapping the second light-emitting element in a plan view; and a convex portion located on the base portion and lower than the height of the first lens portion and the second lens portion, and having a height of 10 μm or more, wherein part or all of the convex portion is located between the first lens portion and the second lens portion in a plan view.

[0006] A display device according to one embodiment of the present disclosure comprises a mounting substrate having a mounting surface and at least one of the above-mentioned light-emitting devices mounted on the mounting surface, wherein, when in use, the first lens portion is located below the second lens portion with the vertical direction downward. [Effects of the Invention]

[0007] The embodiments of this disclosure aim to provide a light-emitting device in which water is less likely to accumulate on the surface of the lens. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a schematic plan view taken from the +Z direction showing the configuration of a display device according to an exemplary embodiment 1 of the present disclosure. [Figure 2A] Figure 2A is a schematic perspective view showing the configuration of a light-emitting device according to an exemplary embodiment 1 of the present disclosure. [Figure 2B] Figure 2B is a schematic plan view taken from the +Z direction showing the configuration of a light-emitting device according to an exemplary embodiment 1 of the present disclosure. [Figure 2C] Figure 2C is a schematic side view taken from the -Y direction, showing the configuration of a light-emitting device according to an exemplary embodiment 1 of the present disclosure. [Figure 2D] Figure 2D is a schematic side view taken from the +X direction showing the configuration of a light-emitting device according to an exemplary embodiment 1 of the present disclosure. [Figure 3A] Figure 3A is a schematic plan view taken from the +Z direction showing the configuration of a light-emitting device according to an exemplary embodiment 2 of the present disclosure. [Figure 3B] Figure 3B is a schematic side view taken from the -Y direction, showing the configuration of a light-emitting device according to an exemplary embodiment 2 of the present disclosure. [Figure 3C] Figure 3C is a schematic side view taken from the +X direction showing the configuration of a light-emitting device according to an exemplary embodiment 2 of the present disclosure. [Figure 4A] Figure 4A is a schematic plan view taken from the +Z direction showing the configuration of a light-emitting device according to exemplary embodiment 3 of the present disclosure. [Figure 4B] Figure 4B is a schematic side view taken from the -Y direction, showing the configuration of a light-emitting device according to exemplary embodiment 3 of the present disclosure. [Figure 4C] Figure 4C is a schematic side view taken from the +X direction showing the configuration of a light-emitting device according to exemplary embodiment 3 of the present disclosure. [Figure 5A] Figure 5A is a schematic plan view taken from the +Z direction showing the configuration of a light-emitting device according to exemplary embodiment 4 of the present disclosure. [Figure 5B] Figure 5B is a schematic side view taken from the -Y direction showing the configuration of a light-emitting device according to exemplary embodiment 4 of the present disclosure. [Figure 5C] Figure 5C is a schematic side view taken from the +X direction showing the configuration of a light-emitting device according to exemplary embodiment 4 of the present disclosure. [Figure 6A] Figure 6A is a schematic plan view taken from the +Z direction showing the configuration of a light-emitting device according to exemplary embodiment 5 of the present disclosure. [Figure 6B] Figure 6B is a schematic side view taken from the -Y direction, showing the configuration of a light-emitting device according to exemplary embodiment 5 of the present disclosure. [Figure 6C] Figure 6C is a schematic side view taken from the +X direction showing the configuration of a light-emitting device according to exemplary embodiment 5 of the present disclosure. [Figure 7A]FIG. 7A is a plan view schematically showing the configuration of a light-emitting device according to Exemplary Embodiment 6 of the present disclosure, as viewed from the +Z direction. [Figure 7B] FIG. 7B is a side view schematically showing the configuration of a light-emitting device according to Exemplary Embodiment 6 of the present disclosure, as viewed from the -Y direction. [Figure 7C] FIG. 7C is a side view schematically showing the configuration of a light-emitting device according to Exemplary Embodiment 6 of the present disclosure, as viewed from the +X direction. [Figure 8A] FIG. 8A is a plan view schematically showing the configuration of a light-emitting device according to Embodiment 1, with the base omitted, as viewed from the +Z direction. [Figure 8B] FIG. 8B is a plan view schematically showing the configuration of a resin package in a state where a plurality of light-emitting elements are accommodated, as viewed from the +Z direction. [Figure 8C] FIG. 8C is a cross-sectional view taken along line VIIIC-VIIIC of the resin package shown in FIG. 8B. [Figure 8D] FIG. 8D is a cross-sectional view taken along line VIIID-VIIID of the resin package shown in FIG. 8B. [Figure 9A] FIG. 9A is a side view schematically showing the configuration of a light-emitting device 1000A according to Embodiment 1, as viewed from the -Y direction, for explaining the shapes of the resin package and the base. [Figure 9B] FIG. 9B is a side view schematically showing the configuration of a light-emitting device 1000A according to Embodiment 1, as viewed from the +X direction, for explaining the shapes of the resin package and the base.

MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings as appropriate. However, the light-emitting device and the display device described below are for embodying the technical idea of the present invention, and unless otherwise specified, the present invention is not limited to the following. Also, the content described in one embodiment is applicable to other embodiments and modifications. Furthermore, the sizes and positional relationships of the components shown in the drawings may be exaggerated for clarity of explanation. Also, as a cross-sectional view, there may be a case where an end view showing only the cut surface is shown.

[0010] In the following descriptions, components having substantially the same function are indicated by a common reference numeral, and their descriptions may be omitted. Alternatively, components not referenced in the descriptions may not be given a reference numeral. In the following descriptions, terms indicating specific directions or positions (e.g., "up," "down," "right," "left," and other terms including these terms) may be used. However, these terms are used only for clarity to indicate the relative direction or position in the referenced drawings. If the relative direction or position relationship using terms such as "up" and "down" in the referenced drawings is the same, the arrangement in drawings other than those disclosed, actual products, manufacturing equipment, etc., does not have to be the same as in the referenced drawings. In this disclosure, "substantially parallel" includes cases where two lines, edges, planes, etc., are within a range of approximately 0° to ±5°, unless otherwise specified. Also, in this disclosure, "substantially perpendicular" or "substantially orthogonal" includes cases where two lines, edges, planes, etc., are within a range of approximately 90° to ±5°, unless otherwise specified.

[0011] In this specification and in the claims, with respect to polygons such as triangles and quadrilaterals, the term "polygon" includes shapes that have been processed by rounding, chamfering, or rounding the corners of the polygon. Furthermore, shapes that have been processed not only at the corners (ends of the sides) but also in the middle of the sides are also referred to as polygons. In other words, shapes that retain the shape of a polygon but have been partially processed are included in the interpretation of "polygon" as described in this specification and in the claims.

[0012] The attached diagram schematically shows the mutually orthogonal X, Y, and Z axes for reference. The direction of the arrow on the X axis is referred to as the +X direction, and the opposite direction is referred to as the -X direction. When the ±X directions are not distinguished, they are simply referred to as the X direction. The same applies to the Y and Z directions.

[0013] Embodiments 1 to 6 are provided as examples of the embodiments of this disclosure.

[0014] (Embodiment 1) In the following, a display device according to Embodiment 1 of the present disclosure will be described with reference to Figure 1, and then a light-emitting device according to Embodiment 1 of the present disclosure, which is a component thereof, will be described with reference to Figures 2A to 2D. However, the light-emitting device according to Embodiment 1 may be used for purposes other than a display device.

[0015] When a display device is used outdoors, for example, water such as rainwater may adhere to the surface of the display device. If the display device is implemented using a light-emitting device with multiple lenses on its surface, if water accumulates between the lenses of the light-emitting device, the light distribution characteristics of the light-emitting device may change due to the influence of the water covering part of the lenses. To solve this problem, the light-emitting device according to Embodiment 1 has a structure that makes it difficult for water to accumulate between the lenses.

[0016] [Display device] Figure 1 is a schematic plan view taken from the +Z direction showing the configuration of a display device according to an exemplary embodiment 1 of the present disclosure. The display device 2000 shown in Figure 1 may be installed outdoors, for example, where rainwater may adhere to it. Alternatively, the display device 2000 may be installed indoors where water may adhere to it, such as in an indoor swimming pool where water splashes. Furthermore, the display device 2000 may be used in environments where there is no water nearby. For example, the display device 2000 may be installed in an environment where condensation occurs due to the condensation of water vapor in the air.

[0017] The display device 2000 may be installed, for example, so that its display surface is substantially parallel to the vertical direction. In the following description, the X direction is defined as the horizontal direction and the -Y direction as the vertical direction. However, the display device 2000 may be positioned at an angle to the vertical direction.

[0018] As shown in Figure 1, the display device 2000 comprises a mounting substrate 1 having a mounting surface 1a and a plurality of light-emitting devices 1000A mounted on the mounting surface 1a. The mounting substrate 1 may be, for example, a printed circuit board having wiring for supplying power to the plurality of light-emitting devices 1000A. Each light-emitting device 1000A functions as one pixel in the display device 2000.

[0019] Multiple light-emitting devices 1000A are arranged in a matrix with rows and columns in the X and Y directions, respectively. When each light-emitting device 1000A individually turns on or off red, green, and blue light, the display device 2000 can display in full color using the three primary colors of light.

[0020] In Embodiment 1, multiple light-emitting devices 1000A are mounted on the mounting substrate 1, but the invention is not limited to this example. A single light-emitting device 1000A may be mounted on the mounting substrate 1. That is, at least one light-emitting device 1000A is mounted on the mounting substrate 1. The at least one light-emitting device 1000A may be a single light-emitting device 1000A, or it may include multiple light-emitting devices 1000A arranged in a line or matrix.

[0021] The display device 2000 further includes a waterproof resin 3 positioned between the multiple light-emitting devices 1000A and covering the sides of each light-emitting device 1000A. The waterproof resin 3 reduces the intrusion of water from rain or condensation into the interior of each light-emitting device 1000A from its sides. The waterproof resin 3 may be, for example, a silicone resin. Furthermore, if the light-emitting devices 1000A are mounted on the mounting substrate 1 by known bonding members such as solder, the waterproof resin 3 covering the sides of each light-emitting device 1000A can protect the bonding members. Note that the display device 2000 does not necessarily require the provision of the waterproof resin 3.

[0022] [Light-emitting device] Figure 2A is a schematic perspective view showing the configuration of the light-emitting device 1000A according to exemplary embodiment 1 of the present disclosure. Figures 2B to 2D are a plan view from the +Z direction, a side view from the -Y direction, and a side view from the +X direction, respectively, showing the configuration of the light-emitting device 1000A according to exemplary embodiment 1 of the present disclosure. In this specification, the +Y direction is also referred to as the "first direction," and the +X direction is also referred to as the "second direction." The second direction is perpendicular to the first direction.

[0023] As shown in Figure 2A, the light-emitting device 1000A comprises a plurality of light-emitting elements 50, a resin package 100 that supports the plurality of light-emitting elements 50 as a support, and a molded resin part 60 that covers the plurality of light-emitting elements 50 as a covering member. The support is not limited to a resin member, but may be, for example, a ceramic member or a conductive member. The covering member is not limited to a resin member, but may be, for example, a glass member. In Figures 2A and 2B, the plurality of light-emitting elements 50 among the components within the resin package 100 are shown by dashed lines.

[0024] The external shape of the light-emitting device 1000A in plan view is generally rectangular. Each side of the rectangular external shape is substantially parallel to the X or Y direction. The external shape of the light-emitting device 1000A in plan view does not have to be rectangular. A rectangle is a quadrilateral with all interior angles being 90°.

[0025] The following is an overview of the multiple light-emitting elements 50, the resin package 100, and the molded resin part 60.

[0026] <50 light-emitting elements> The multiple light-emitting elements 50 are arranged in the Y direction, as shown in Figures 2A and 2B. Each light-emitting element 50 emits light in the +Z direction. The multiple light-emitting elements 50 may, for example, emit light of different wavelengths. Alternatively, at least two of the multiple light-emitting elements 50 may emit light of the same wavelength, or all of the light-emitting elements 50 may emit light of the same wavelength. The light-emitting elements 50 may be, for example, LEDs.

[0027] The multiple light-emitting elements 50 include a first light-emitting element 51, a second light-emitting element 52, and a third light-emitting element 53 arranged in this order in the +Y direction. In the light-emitting device 1000A, the first light-emitting element 51 emits red light, the second light-emitting element 52 emits green light, and the third light-emitting element 53 emits blue light. The light emitted from the first light-emitting element 51, the second light-emitting element 52, and the third light-emitting element 53 is not particularly limited. Also, one light-emitting element may emit light of different wavelengths. For example, the semiconductor structure of one light-emitting element may include multiple light-emitting sections, each of which includes an n-side semiconductor layer, an active layer, and a p-side semiconductor layer. When the semiconductor structure includes multiple light-emitting sections, each light-emitting section may include well layers with different emission peak wavelengths, or well layers with the same emission peak wavelength. Note that "same emission peak wavelength" includes cases where there is a variation of a few nanometers. The combination of emission peak wavelengths of the multiple light-emitting sections can be selected as appropriate.

[0028] In Embodiment 1, the number of light-emitting elements 50 is 3, but this is not the only example. The number of light-emitting elements 50 may be 2, or 4 or more.

[0029] In Embodiment 1, each light-emitting element 50 has a square shape in plan view, and one side is arranged at an angle of 45° with respect to the X direction, but the invention is not limited to this example. At least one light-emitting element 50 may be arranged such that, for example, two opposing sides of the square are substantially parallel to the X direction, and the other two opposing sides are substantially parallel to the Y direction.

[0030] <100 Resin Packages> As shown in Figure 2A, the resin package 100 comprises a dark-colored resin member 40 that houses a plurality of light-emitting elements 50, and a plurality of pairs of leads 10 fixed to the resin member 40. As shown in Figures 2C and 2D, the resin package 100 has a main surface 100a, a back surface 100b located on the opposite side of the main surface 100a, and an outer portion 100c located between the main surface 100a and the back surface 100b. The main surface 100a is the surface of the resin member 40 on the +Z direction side. The hatched areas shown in Figures 2C and 2D represent the resin member 40. In this specification, the main surface 100a of the resin package 100 is also referred to as the "first surface," and the back surface 100b of the resin package 100 is also referred to as the "second surface." "Plan view from the +Z direction" may be rephrased as "plan view from the main surface 100a side."

[0031] The resin member 40 has a large recess in its main surface 100a, and multiple light-emitting elements 50 are housed inside this recess. Therefore, it can also be said that the multiple light-emitting elements 50 are located on the side of the main surface 100a.

[0032] The multiple pairs of leads 10 are arranged in the Y direction, as shown in Figure 2B, similar to the multiple light-emitting elements 50. Each pair of leads 10 supplies power to a light-emitting element 50. The multiple pairs of leads 10 include a pair of first leads 11, a pair of second leads 12, and a pair of third leads 13, all arranged in this order along the +Y direction. The pair of first leads 11 supply power to the first light-emitting element 51, the pair of second leads 12 supply power to the second light-emitting element 52, and the pair of third leads 13 supply power to the third light-emitting element 53. Thus, the first light-emitting element 51, the second light-emitting element 52, and the third light-emitting element 53 can be individually turned on or off.

[0033] In Embodiment 1, the number of lead pairs 10 is three, but this is not the only example. The number of lead pairs 10 may be more than, less than, or the same as the number of light-emitting elements 50.

[0034] <Molded resin part 60> As shown in Figure 2B, the molded resin portion 60 comprises a base portion 61 that overlaps the plurality of light-emitting elements 50 in a plan view, and a plurality of lens portions 70 located on the base portion 61.

[0035] As shown in Figures 2A to 2D, the base portion 61 has a surface 61a located on each lens portion 70 side. The surface 61a includes the starting point where each lens portion 70 is formed. As shown in Figures 2C and 2D, the surface 61a is located above the main surface 100a of the resin package 100.

[0036] As shown in Figures 2A, 2C, and 2D, the base portion 61 surrounds the resin package 100 and has an extended portion 64 that extends outward from the base portion 61. The extended portion 64 is useful when manufacturing the display device 2000 shown in Figure 1. When providing waterproof resin 3 between multiple light-emitting devices 1000A on a horizontally arranged mounting substrate 1 during the manufacturing of the display device 2000, the extended portion 64 reduces the likelihood of the waterproof resin 3 creeping up the outer portion of the base portion 61 and reaching the surface 61a of the base portion 61.

[0037] Of the side surfaces of the light-emitting device 1000A, the boundary 1000u between the molded resin part 60 and the resin package 100 is a part from which water can enter the light-emitting device 1000A from the outside. The waterproof resin 3 is provided to contact the boundary 1000u and protect the boundary 1000u.

[0038] If it is not necessary to provide waterproof resin 3 between multiple light-emitting devices 1000A, the base 61 does not need to have an extended portion 64. Even if waterproof resin 3 is provided between multiple light-emitting devices 1000A, the base 61 does not need to have an extended portion 64 if the waterproof resin 3 is provided in a way that prevents it from creeping up onto the surface 61a of the base 61.

[0039] The multiple lens portions 70 are located on the base portion 61, as shown in Figures 2A and 2B. The multiple lens portions 70 are arranged in the Y direction, similar to the multiple light-emitting elements 50. Each lens portion 70 has a convex shape extending in the +Z direction from the surface 61a of the base portion 61. The surface of each lens portion 70 is not included in the surface 61a of the base portion 61. Each lens portion 70 has a light distribution function that controls the direction and distribution of light emitted from the corresponding light-emitting element 50.

[0040] The multiple lens sections 70 include a first lens section 71, a second lens section 72, and a third lens section 73, arranged in this order along the +Y direction, as shown in Figures 2A and 2B. As shown in Figure 2B, in a plan view, the first lens section 71 overlaps the first light-emitting element 51, the second lens section 72 overlaps the second light-emitting element 52, and the third lens section 73 overlaps the third light-emitting element 53. When the display device 2000 is in use, with the vertical direction downwards, the first lens section 71 is located below the second lens section 72, and the second lens section 72 is located below the third lens section 73.

[0041] In Embodiment 1, the number of lens units 70 is three, but this is not the only example. The number of lens units 70 may be more than, less than, or the same as the number of light-emitting elements 50.

[0042] Details of the multiple light-emitting elements 50 and the resin package 100 will be described later. Details of the molded resin part 60 will also be described later, except for the matters described below.

[0043] <Convex part 80> In the light-emitting device 1000A according to Embodiment 1, the molded resin portion 60 has a plurality of protrusions 80 located on the base portion 61, as shown in Figures 2A and 2B. The plurality of protrusions 80 are spaced apart from each other on the surface 61a of the base portion 61. The portion of the surface 61a of the base portion 61 other than the plurality of protrusions 80 may be parallel to the XY plane or may be inclined with respect to the XY plane. As will be explained in detail later, the plurality of protrusions 80 make it difficult for water to accumulate between the plurality of lens portions 70 even if water adheres to the surface. Therefore, it is possible to reduce the change in the light distribution characteristics of the light-emitting device 1000A due to water accumulated between the lens portions 70.

[0044] In this specification, the protrusion 80 has a height of 10 μm or more relative to the periphery of the protrusion 80 on the surface 61a. As shown in Figure 2D, the height of the protrusion 80 differs depending on whether the periphery on the -Y direction side or the +Y direction side is used as the reference. If the heights of the protrusion 80 differ, the smaller value is used as the height of the protrusion 80.

[0045] The above-mentioned protrusions 80 are different from the protrusions of irregularities that may be provided to roughen at least a portion of the surface 61a. When at least a portion of the surface 61a is roughened, the arithmetic mean roughness Ra of at least a portion may be, for example, 0.4 μm or more and 5 μm or less. Ra can be measured in accordance with the surface roughness measurement method of JIS B 0601-2001. For measuring Ra, a contact-type surface roughness measuring instrument, a laser microscope, etc., can be used. For example, a Keyence VK-250 laser microscope can be used.

[0046] The multiple protrusions 80 include a first protrusion 81, a second protrusion 82, and a pair of third protrusions 83, arranged in this order in the +Y direction, as shown in Figures 2A and 2B. The second protrusion 82 is located away from the first protrusion 81. The pair of third protrusions 83 are located away from the second protrusion 82. The first protrusion 81 is located away from the pair of third protrusions 83.

[0047] The surface of the first protrusion 81 has two slopes on the ±Y direction side and an upper surface located between the two slopes. The same applies to the surface of the second protrusion 82 and each of the third protrusions 83. The surfaces of the first protrusion 81, the second protrusion 82, and each of the third protrusions 83 may have smooth curved surfaces.

[0048] It is not necessary to provide all of the first protrusion 81, the second protrusion 82, and the pair of third protrusions 83. For example, at least one of the protrusions 81 to 83 may be provided.

[0049] <First protrusion 81> As shown in Figure 2B, a portion of the first protrusion 81 is located between the first lens portion 71 and the second lens portion 72 in a plan view. In a plan view, a portion of the first protrusion 81 overlaps with at least one of a plurality of imaginary line segments connecting a portion of the first lens portion 71 and a portion of the second lens portion 72. In the first embodiment, the first protrusion 81 overlaps with both the first lens portion 71 and the second lens portion 72 in the Y direction. In the X direction, the first protrusion 81 has a portion that overlaps with the first lens portion 71, but does not have a portion that overlaps with the second lens portion 72 in the X direction.

[0050] As shown in Figures 2C and 2D, the first protrusion 81 is lower than the height of the first lens portion 71 and the second lens portion 72, respectively. Therefore, the light emitted from each of the first lens portion 71 and the second lens portion 72 is not easily blocked by the first protrusion 81. The height of the first protrusion 81 may be, for example, 1 / 2, 1 / 3, or 1 / 4 of the height of each of the first lens portion 71 and the second lens portion 72.

[0051] The first protrusion 81 does not extend as far in the +Z direction from the base 61 as the first lens portion 71 and the second lens portion 72. In other words, the portion of the first lens portion 71 and the portion of the second lens portion 72 that are furthest to the +Z direction are located further to the +Z direction than the portion of the first protrusion 81 that are furthest to the +Z direction.

[0052] As shown in Figure 2B, the first protrusion 81 has a first region 80a, a second region 80b, a third region 80c, a fourth region 80d, and a fifth region 80e.

[0053] The first region 80a is located between the first lens portion 71 and the second lens portion 72 in a plan view. The first region 80a is a part of the first convex portion 81 that overlaps with at least one of a plurality of imaginary line segments connecting a part of the first lens portion 71 and a part of the second lens portion 72 in a plan view. The first region 80a overlaps with both the first lens portion 71 and the second lens portion 72 in the Y direction. The first region 80a overlaps with the straight line connecting the center of the first lens portion 71 and the center of the second lens portion 72 in a plan view.

[0054] The second region 80b is connected to the first region 80a. In a plan view, the second region 80b is not located between the first lens portion 71 and the second lens portion 72. In a plan view, the second region 80b is a part of the first convex portion 81 that does not overlap with any of the multiple imaginary line segments connecting at least a part of the first lens portion 71 and at least a part of the second lens portion 72. The second region 80b may or may not have a portion that overlaps with the first lens portion 71 in the X direction.

[0055] The third region 80c is connected to the second region 80b. Furthermore, in a plan view, the third region 80c is located on the +X side with respect to the first lens portion 71. The third region 80c overlaps with the first lens portion 71 in the second direction (X direction).

[0056] The fourth region 80d is connected to the first region 80a. Furthermore, in a plan view, the fourth region 80d is located on the opposite side of the second region 80b with respect to the first region 80a. In a plan view, the fourth region 80d is not located between the first lens portion 71 and the second lens portion 72. The fourth region 80d may or may not have a portion that overlaps with the first lens portion 71 in the X direction.

[0057] The fifth region 80e is connected to the fourth region 80d. Furthermore, in a plan view, the fifth region 80e is located on the opposite side from the third region 80c, i.e., on the -X direction side, with respect to the first lens portion 71. The fifth region 80e overlaps with the first lens portion 71 in the X direction.

[0058] Water adhering to the surface 61a of the base 61 between the first lens portion 71 and the second lens portion 72, and near the first lens portion 71, moves along the surface of the first lens portion 71 and the slope on the -Y direction side of the first convex portion 81, moving in the order of the first region 80a and the second region 80b, and is discharged to the outside of the surface 61a of the base 61. Alternatively, water adhering to the surface 61a of the base 61 between the first lens portion 71 and the second lens portion 72, and near the first lens portion 71, moves along the surface of the first lens portion 71 and the slope on the -Y direction side of the first convex portion 81, moving in the order of the first region 80a and the fourth region 80d, and is discharged to the outside of the surface 61a of the base 61.

[0059] Of the surface 61a of the base 61, water adhering to the area between the first lens portion 71 and the second lens portion 72, near the second lens portion 72, moves along the slope on the +Y direction side of the first convex portion 81 in the order of the first region 80a, the second region 80b, and the third region 80c. Alternatively, of the surface 61a of the base 61, water adhering to the area between the first lens portion 71 and the second lens portion 72, near the second lens portion 72, moves along the slope on the +Y direction side of the first convex portion 81 in the order of the first region 80a, the fourth region 80d, and the fifth region 80e.

[0060] As a result, even if water adheres between the first lens portion 71 and the second lens portion 72, it becomes less likely for water to accumulate between them. The fact that a portion of the first region 80a coincides with a straight line connecting the center of the first lens portion 71 and the center of the second lens portion 72 in a plan view is effective in preventing water from accumulating between the first lens portion 71 and the second lens portion 72.

[0061] The dimension of the first protrusion 81 in the first direction (Y direction) increases as it moves away from the center of the first lens portion 71 in the second direction (X direction). In this case, it becomes easier to design the first protrusion 81 such that the area of ​​the slope on the +Y direction side of the first protrusion 81 increases as it moves away from the center of the first lens portion 71 in the X direction. As the area of ​​the slope of the first protrusion 81 increases as it moves away from the center of the first lens portion 71, the slope of the first protrusion 81 makes it easier to control the water adhering to the slope as it moves away from the center of the second lens portion 72. As a result, water adhering to the first region 80a is more easily moved to the third region 80c via the second region 80b, or to the fifth region 80e via the fourth region 80d.

[0062] As shown in Figures 2C and 2D, the height of the first protrusion 81 increases as it moves away from the center of the first lens portion 71 in the X direction. In this case as well, similar to the above, water adhering to the slopes on the +Y direction side of the pair of first protrusions 81 tends to move in the direction where the area of ​​the slopes increases.

[0063] As shown in Figure 2B, the outer edge of the first protrusion 81 on the -Y direction side has a portion that extends away from the center of the first lens portion 71 in the X direction as it moves away from the center of the second lens portion 72 in the Y direction. Therefore, water adhering to the surface 61a of the base portion 61, between the first lens portion 71 and the second lens portion 72, and near the first lens portion 71, is easily moved downward along the surface of the first lens portion 71 and the slope of the first protrusion 81 on the -Y direction side.

[0064] The outer edge of the first protrusion 81 on the +Y direction side also has a portion that extends away from the center of the first lens portion 71 in the X direction as it moves away from the center of the second lens portion 72 in the Y direction. Therefore, water adhering to the surface 61a of the base portion 61, between the first lens portion 71 and the second lens portion 72, and near the second lens portion 72, is easily moved downward along the first protrusion 81.

[0065] The third region 80c is preferably in contact with at least a portion of the outer edge of the base 61 in a plan view. In Embodiment 1, the third region 80c is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the third region 80c is easily discharged to the outside of the surface 61a of the base 61. Similarly, the fifth region 80e is preferably in contact with at least a portion of the outer edge of the base 61 in a plan view. In Embodiment 1, the fifth region 80e is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the fifth region 80e is easily discharged to the outside of the surface 61a of the base 61.

[0066] The water-repellent properties of the surface of the first protrusion 81 may be higher than those of the peripheral portion of the surface 61a of the base 61. In this case, the surface of the first protrusion 81 repels water more easily than the peripheral portion of the surface 61a of the base 61. Therefore, water adhering to the slope on the +Y direction side of the first protrusion 81 tends to move downward along the first protrusion 81.

[0067] The higher the water-repellent properties of a surface, the larger the contact angle of water adhering to the surface, making the surface more water-repellent. The water contact angle is the angle between the surface to which water adheres and the outer surface of the water at the point of contact. The contact angle can be measured, for example, by a method conforming to JIS R 3257. Here, water-repellent properties refer to a contact angle of 90° or greater.

[0068] <Second protrusion 82> As shown in Figure 2B, a portion of the second protrusion 82 is located between the second lens portion 72 and the third lens portion 73 in a plan view. In the first embodiment, the second protrusion 82 overlaps both the second lens portion 72 and the third lens portion 73 in the Y direction. The second protrusion 82 has a portion that overlaps with the second lens portion 72 in the X direction, but does not have a portion that overlaps with the first lens portion 71 and the third lens portion 73 in the X direction.

[0069] As shown in Figure 2D, the second protrusion 82 is lower than the heights of the second lens portion 72 and the third lens portion 73, respectively. Therefore, the light emitted from the second lens portion 72 and the third lens portion 73 is not easily blocked by the second protrusion 82. The height of the second protrusion 82 may be, for example, 1 / 2, 1 / 3, or 1 / 4 of the heights of the second lens portion 72 and the third lens portion 73, respectively.

[0070] The second protrusion 82 does not extend as far in the +Z direction from the base 61 as the second lens portion 72 and the third lens portion 73. In other words, the portion of the second lens portion 72 and the portion of the third lens portion 73 that are furthest to the +Z direction are located further to the +Z direction than the portion of the second protrusion 82 that are furthest to the +Z direction.

[0071] As shown in Figure 2B, the second protrusion 82 has a sixth region 80f, a seventh region 80g, an eighth region 80h, a ninth region 80i, and a tenth region 80j.

[0072] The sixth region 80f is located between the second lens portion 72 and the third lens portion 73 in a plan view. The sixth region 80f overlaps both the second lens portion 72 and the third lens portion 73 in the Y direction. Furthermore, in a plan view, the sixth region 80f is located on the opposite side from the first region 80a with respect to the second lens portion 72. In a plan view, the sixth region 80f coincides with the straight line connecting the center of the second lens portion 72 and the center of the third lens portion 73.

[0073] The seventh region 80g is connected to the sixth region 80f. In a plan view, the seventh region 80g is not located between the second lens portion 72 and the third lens portion 73. The seventh region 80g may or may not have a portion that overlaps with the second lens portion 72 in the X direction.

[0074] The eighth region 80h connects to the seventh region 80g. Furthermore, in a plan view, the eighth region 80h is located on the +X side with respect to the second lens section 72. The eighth region 80h overlaps with the second lens section 72 in the X direction. The eighth region 80h does not connect to the second region 80b or the third region 80c.

[0075] The ninth region 80i is connected to the sixth region 80f. Furthermore, in a plan view, the ninth region 80i is located on the opposite side of the seventh region 80g with respect to the sixth region 80f. In a plan view, the ninth region 80i is not located between the second lens portion 72 and the third lens portion 73. The ninth region 80i may or may not have a portion that overlaps with the second lens portion 72 in the X direction.

[0076] The 10th region 80j connects to the 9th region 80i. Furthermore, in a plan view, the 10th region 80j is located on the opposite side of the 8th region 80h, i.e., on the -X direction side, with respect to the second lens section 72. The 10th region 80j overlaps with the second lens section 72 in the X direction. The 10th region 80j does not connect to the 4th region 80d and the 5th region 80e.

[0077] Of the surface 61a of the base 61, water adhering to the area between the second lens portion 72 and the third lens portion 73, near the second lens portion 72, moves along the surface of the second lens portion 72 and the slope on the -Y direction side of the second convex portion 82, through the sixth region 80f and the seventh region 80g in that order, and then moves to the first convex portion 81 below. Alternatively, of the surface 61a of the base 61, water adhering to the area between the second lens portion 72 and the third lens portion 73, near the second lens portion 72, moves along the surface of the second lens portion 72 and the slope on the -Y direction side of the second convex portion 82, through the sixth region 80f and the ninth region 80i in that order, and then moves to the first convex portion 81 below.

[0078] Of the surface 61a of the base 61, water adhering to the area between the second lens portion 72 and the third lens portion 73, near the third lens portion 73, moves along the slope on the +Y direction side of the second convex portion 82 through the sixth region 80f, the seventh region 80g, and the eighth region 80h in that order. Alternatively, of the surface 61a of the base 61, water adhering to the area between the second lens portion 72 and the third lens portion 73, near the third lens portion 73, moves along the slope on the +Y direction side of the second convex portion 82 through the sixth region 80f, the ninth region 80i, and the tenth region 80j in that order.

[0079] As a result, even if water adheres between the second lens portion 72 and the third lens portion 73, it becomes less likely for water to accumulate between them. The fact that a portion of the sixth region 80f coincides with the straight line connecting the center of the second lens portion 72 and the center of the third lens portion 73 in a plan view is effective in preventing water from accumulating between the second lens portion 72 and the third lens portion 73.

[0080] The dimension of the second protrusion 82 in the first direction (Y direction) increases as it moves away from the center of the second lens portion 72 in the second direction (X direction). In this case, it becomes easier to design the second protrusion 82 such that the area of ​​the slope on the +Y direction side of the second protrusion 82 increases as it moves away from the center of the second lens portion 72 in the X direction. As the area of ​​the slope of the second protrusion 82 increases as it moves away from the center of the second lens portion 72, the slope of the second protrusion 82 makes it easier to control the water adhering to the slope as it moves away from the center of the second lens portion 72. As a result, water adhering to the sixth region 80f is more easily moved to the eighth region 80h via the seventh region 80g, or to the tenth region 80j via the ninth region 80i.

[0081] As shown in Figure 2D, the height of the second protrusion 82 increases as it moves away from the center of the second lens portion 72 in the X direction. In this case as well, similar to the above, water adhering to the slopes on the +Y direction side of the pair of second protrusions 82 tends to move in the direction where the area of ​​the slopes increases.

[0082] As shown in Figure 2B, the outer edge of the second protrusion 82 on the -Y direction side has a portion that extends further away from the center of the second lens portion 72 in the X direction as it moves away from the center of the third lens portion 73 in the Y direction. Therefore, water adhering to the surface 61a of the base portion 61, between the second lens portion 72 and the third lens portion 73, and near the second lens portion 72, is easily moved downward along the surface of the second lens portion 72 and the slope of the second protrusion 82 on the -Y direction side.

[0083] The outer edge of the second protrusion 82 on the +Y direction side also has a portion that extends away from the center of the second lens portion 72 in the X direction as it moves away from the center of the third lens portion 73 in the Y direction. Therefore, water adhering to the surface 61a of the base portion 61, between the second lens portion 72 and the third lens portion 73, and near the third lens portion 73, is easily moved downward along the second protrusion 82.

[0084] It is preferable that the eighth region 80h is in contact with at least a portion of the outer edge of the base 61 in a plan view. In Embodiment 1, the eighth region 80h is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the eighth region 80h is easily discharged to the outside of the surface 61a of the base 61. Similarly, it is preferable that the tenth region 80j is in contact with at least a portion of the outer edge of the base 61 in a plan view. In Embodiment 1, the tenth region 80j is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the tenth region 80j is easily discharged to the outside of the surface 61a of the base 61.

[0085] The water-repellent properties of the surface of the second protrusion 82 may be higher than those of the peripheral portion of the surface 61a of the base 61. In this case, the surface of the second protrusion 82 repels water more easily than the peripheral portion of the surface 61a of the base 61. Therefore, water adhering to the slope on the +Y direction side of the second protrusion 82 tends to move downward along the second protrusion 82.

[0086] <Pair of third protrusions 83> As shown in Figure 2B, a portion of each third protrusion 83 overlaps with the third lens portion 73 in the first direction (Y direction). Each third protrusion 83 has a portion that overlaps with the third lens portion 73 in the second direction (X direction), but does not have a portion that overlaps with the second lens portion 72 in the second direction (X direction).

[0087] As shown in Figure 2D, the pair of third protrusions 83 are lower than the height of the third lens portion 73. Therefore, the light emitted from the third lens portion 73 is not easily blocked by the pair of third protrusions 83. The height of each third protrusion 83 may be, for example, 1 / 2, 1 / 3, or 1 / 4 of the height of the third lens portion 73.

[0088] The pair of third protrusions 83 do not extend as far from the base 61 in the +Z direction as the third lens portion 73. In other words, the portion of the third lens portion 73 that is furthest to the +Z direction is located further to the +Z direction than the portion of each third protrusion 83 that is furthest to the +Z direction.

[0089] As shown in Figure 2B, the pair of third protrusions 83 have 11th regions 80k1 and 80k2, 12th region 80l, 13th region 80m, 14th region 80n, and 15th region 80o. The third protrusion 83 on the +X direction side has 11th region 80k1, 12th region 80l, and 13th region 80m. The third protrusion 83 on the -X direction side has 11th region 80k2, 14th region 80n, and 15th region 80o.

[0090] In a plan view, the 11th regions 80k1 and 80k2 are located on the opposite side of the 6th region 80f with respect to the 3rd lens portion 73. The 11th regions 80k1 and 80k2 are located apart from each other and overlap the 3rd lens portion 73 in the Y direction.

[0091] The 12th region 80l connects to the 11th region 80k1 in a plan view. The 12th region 80l does not overlap with the third lens portion 73 in the Y direction. The 12th region 80l may or may not have a portion that overlaps with the third lens portion 73 in the X direction.

[0092] The 13th region 80m connects to the 12th region 80l. In a plan view, the 13th region 80m is located on the +X side with respect to the third lens section 73. The 13th region 80m overlaps with the third lens section 73 in the X direction. The 13th region 80m does not connect to the 7th region 80g and the 8th region 80h.

[0093] The 14th region 80n is connected to the 11th region 80k2. In a plan view, the 14th region 80n is located on the opposite side from the 12th region 80l with respect to the 11th regions 80k1 and 80k2. The 14th region 80n does not overlap with the third lens portion 73 in the Y direction. The 14th region 80n may or may not have a portion that overlaps with the third lens portion 73 in the X direction.

[0094] The 15th region 80o connects to the 14th region 80n. Furthermore, in a plan view, the 15th region 80o is located on the opposite side of the 13th region 80m from the 3rd lens section 73, i.e., on the -X direction side. The 15th region 80o overlaps with the 3rd lens section 73 in the X direction. The 15th region 80o does not connect to the 9th region 80i and the 10th region 80j.

[0095] Water adhering to the +Y direction side of the surface 61a of the base 61 with respect to the third lens portion 73 moves along the surface of the third lens portion 73 and the slope on the -Y direction side of each third convex portion 83, moving in the order of the 11th region 80k1 and the 12th region 80l, and then to the lower second convex portion 82. Alternatively, water adhering to the +Y direction side of the surface 61a of the base 61 with respect to the third lens portion 73 moves along the surface of the third lens portion 73 and the slope on the -Y direction side of the third convex portion 83, moving in the order of the 11th region 80k2 and the 14th region 80n, and then to the lower second convex portion 82.

[0096] Of the surface 61a of the base 61, water adhering to the +Y side with respect to the third protrusion 83 on the +X side moves along the slope on the +Y side of the third protrusion 83 in the 11th region 80k1, the 12th region 80l, and the 13th region 80m in that order. Also, of the surface 61a of the base 61, water adhering to the +Y side with respect to the third protrusion 83 on the -X side moves along the slope on the +Y side of the third protrusion 83 in the 11th region 80k2, the 12th region 80l, and the 13th region 80m in that order.

[0097] Of the surface 61a of the base portion 61, water adhering to the +Y direction side with respect to the third protrusion 83 on the -X direction side moves along the slope of the third protrusion 83 on the +Y direction side, in the order of the 11th region 80k2, the 14th region 80n, and the 15th region 80o, or in the order of the 14th region 80n and the 15th region 80o.

[0098] The dimensions of the pair of third protrusions 83 in the Y direction increase as they move away from the center of the third lens portion 73 in the X direction. In this case, it becomes easier to design the pair of third protrusions 83 such that the area of ​​the slope on the +Y direction side of the pair of third protrusions 83 increases as they move away from the center of the third lens portion 73 in the X direction. As the area of ​​the slope of the third protrusion 83 increases as it moves away from the center of the third lens portion 73, the slope of the third protrusion 83 makes it easier to control the water adhering to the slope as it moves away from the center of the third lens portion 73. As a result, water adhering to the 11th region 80k1 is more easily moved to the 13th region 80m via the 12th region 80l. Also, water adhering to the 11th region 80k2 is more easily moved to the 15th region 80o via the 14th region 80n.

[0099] As shown in Figure 2D, the height of the pair of third protrusions 83 increases as it moves away from the center of the third lens portion 73 in the X direction. In this case as well, similar to the above, water adhering to the slopes on the +Y direction side of the pair of third protrusions 83 tends to move in the direction where the area of ​​the slopes increases.

[0100] The outer edges of the pair of third protrusions 83 on the -Y direction side have portions that extend away from the center of the third lens portion 73 in the X direction as they move away from the outer edge located on the +Y direction side of the surface 61a of the base portion 61 in the Y direction. Therefore, water adhering to the +Y direction side of the surface 61a of the base portion 61 with respect to the third lens portion 73 is easily moved to the second protrusion 82 below along the surface of the third lens portion 73 and the slope on the -Y direction side of the pair of third protrusions 83.

[0101] The outer edges of the pair of third protrusions 83 on the +Y direction side also have portions that extend away from the center of the third lens portion 73 in the X direction as they move away from the outer edge located on the +Y direction side of the surface 61a of the base portion 61 in the Y direction. Therefore, water adhering to the +Y direction side of the surface 61a of the base portion 61 with respect to the pair of third lens portions 73 is easily moved downward along the slope of the pair of third protrusions 83 on the +Y direction side.

[0102] The 13th region 80m is preferably in contact with at least a portion of the outer edge of the base 61 in a plan view. In Embodiment 1, the 13th region 80m is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the 13th region 80m is easily discharged to the outside of the surface 61a of the base 61. Similarly, the 15th region 80o is preferably in contact with at least a portion of the outer edge of the base 61 in a plan view. In Embodiment 1, the 15th region 80o is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the 15th region 80o is easily discharged to the outside of the surface 61a of the base 61.

[0103] The water-repellent properties of the surface of the pair of third protrusions 83 may be higher than those of the peripheral portion of the surface 61a of the base 61 that surrounds the pair of third protrusions 83. In this case, the surface of the pair of third protrusions 83 repels water more easily than the peripheral portion of the surface 61a of the base 61 that surrounds the pair of third protrusions 83. Therefore, water adhering to the slope on the +Y direction side of the protrusions 83 tends to move downward along the protrusions 83.

[0104] The pair of third protrusions 83 do not drain water between the multiple lens portions 70, so they are not necessarily required. On the other hand, if the pair of third protrusions 83 are provided, it is possible to reduce the movement of water adhering to the +Y direction side of the surface 61a of the base portion 61 with respect to the pair of third protrusions 83 to the second protrusion 82. As a result, water is less likely to adhere to the second protrusion 82.

[0105] <Example of modification> In Embodiment 1, the first protrusion 81, the second protrusion, and the pair of third protrusions are symmetric with respect to a reference plane parallel to the YZ plane, but the embodiment is not limited to this example. The first protrusion 81, the second protrusion, and the pair of third protrusions may be asymmetric with respect to this reference plane. For example, the first protrusion 81 may not have a second region 80b and a third region 80c, or a fourth region 80d and a fifth region 80e. The second protrusion 82 may not have a seventh region 80g and an eighth region 80h, or a ninth region 80i and a tenth region 80j. The pair of third protrusions 83 may have only one protrusion 83.

[0106] In Embodiment 1, the width of each protrusion 80 increases as it approaches the outer edge of the surface 61a of the base 61, but the invention is not limited to this example. The width of each protrusion 80 may be constant, or it may become narrower as it approaches the outer edge of the surface 61a of the base 61.

[0107] In Embodiment 1, the height of each protrusion 80 increases as it moves away from the center of the lens portion 70 located near each protrusion 80 in the X direction, but the embodiment is not limited to this example. The height of each protrusion 80 may be constant, or it may decrease as it moves away from the center of the lens portion 70 located near each protrusion 80 in the X direction.

[0108] In Embodiment 1, the outer edge of each protrusion 80 is curved, but the invention is not limited to this example. The outer edge of each protrusion 80 may be formed by at least one straight line.

[0109] In Embodiment 1, the surface of each protrusion 80 is in contact with the outer edge of the surface 61a of the base 61, but the invention is not limited to this example. The surfaces of some or all of the protrusions 80 do not need to be in contact with the outer edge of the surface 61a of the base 61.

[0110] From the above, in the light-emitting device 1000A according to Embodiment 1, even if water adheres to the surface, water is less likely to accumulate between the multiple lens parts 70. Therefore, it is possible to reduce the change in the light distribution characteristics of the light-emitting device 1000A due to water accumulated between the lens parts 70.

[0111] To prevent water from accumulating between the multiple lens sections 70, a water-repellent coating could be applied to the surface 61a of the base 61. However, the coating may peel off due to deterioration over time.

[0112] In contrast, in the light-emitting device 1000A according to Embodiment 1, a plurality of protrusions 80 are provided on the surface 61a of the base 61. The structure of the protrusions 80 itself does not change significantly due to aging, which is advantageous for long-term use.

[0113] (Embodiment 2) In the following, a light-emitting device according to Embodiment 2 of the present disclosure will be described with reference to Figures 3A to 3C. Figures 3A to 3C are a plan view from the +Z direction, a side view from the -Y direction, and a side view from the +X direction, respectively, schematically showing the configuration of a light-emitting device according to exemplary Embodiment 2 of the present disclosure. The difference between the light-emitting device 1000B shown in Figures 3A to 3C and the light-emitting device 1000A shown in Figures 2A to 2D is the shape of the protrusion 80.

[0114] The multiple protrusions 80 include a pair of first protrusions 81, a pair of second protrusions 82, and a pair of third protrusions 83, arranged in this order in the +Y direction, as shown in Figure 3A. The pair of second protrusions 82 are located away from the pair of first protrusions 81. The pair of third protrusions 83 are located away from the pair of second protrusions 82. The pair of first protrusions 81 are located away from the pair of third protrusions 83.

[0115] Each first protrusion 81 has two slopes on the ±Y direction side and an upper surface located between the two slopes. The same applies to the surfaces of each second protrusion 82 and each third protrusion 83. The surfaces of each first protrusion 81, each second protrusion 82, and each third protrusion 83 may have smooth curved surfaces.

[0116] It is not necessary to provide all three pairs of protrusions 81-83. For example, at least one pair of protrusions from the three pairs of protrusions 81-83 may be provided. Alternatively, one pair of protrusions from the three pairs of protrusions 81-83 may be provided, but the other protrusion may be omitted. For example, only the protrusions 81-83 located on the same side of the three pairs of protrusions 81-83 may be provided.

[0117] <Pair of first protrusions 81> As shown in Figure 3A, a portion of each first protrusion 81 is located between the first lens portion 71 and the second lens portion 72 in a plan view. In the Y direction, each first protrusion 81 overlaps with both the first lens portion 71 and the second lens portion 72. Each first protrusion 81 has a portion that overlaps with the first lens portion 71 in the X direction, but does not have a portion that overlaps with the second lens portion 72 in the X direction.

[0118] As shown in Figures 3B and 3C, the pair of first protrusions 81 are lower than the heights of the first lens portion 71 and the second lens portion 72, respectively. Therefore, the light emitted from each of the first lens portion 71 and the second lens portion 72 is not easily blocked by the pair of first protrusions 81. The height of each first protrusion 81 may be, for example, 1 / 2, 1 / 3, or 1 / 4 of the height of each of the first lens portion 71 and the second lens portion 72, respectively.

[0119] The pair of first protrusions 81 do not extend as far to the +Z direction from the base 61 as the first lens portion 71 and the second lens portion 72. In other words, the portion of the first lens portion 71 and the portion of the second lens portion 72 that are furthest to the +Z direction are located further to the +Z direction than the portion of the first protrusion 81 that are furthest to the +Z direction.

[0120] The pair of first protrusions 81, as shown in Figure 3A, have a first region 80a1 and 80a2, a second region 80b, a third region 80c, a fourth region 80d, and a fifth region 80e. The pair of first protrusions 81 shown in Figure 3A differ from the first protrusions 81 shown in Figure 2B in that they have first regions 80a1 and 80a2 instead of the first region 80a.

[0121] The first regions 80a1 and 80a2 are located apart from each other between the first lens portion 71 and the second lens portion 72 in a plan view. The first regions 80a1 and 80a2 overlap both the first lens portion 71 and the second lens portion 72 in the Y direction. The first convex portion 81 on the +X direction side has the first region 80a1, the second region 80b, and the third region 80c. The first convex portion 81 on the -X direction side has the eleventh region 80k2, the fourteenth region 80n, and the fifteenth region 80o. The second region 80b, the third region 80c, the fourth region 80d, and the fifth region 80e are described with reference to Figure 2B.

[0122] In Embodiment 2, unlike Embodiment 1, neither of the first regions 80a1 and 80a2 included in the pair of first protrusions 81 coincides with the straight line connecting the center of the first lens portion 71 and the center of the second lens portion 72 in a plan view. Even in this case, in the pair of first protrusions 81, water adhering to the slope on the +Y direction side of the first region 80a1 moves to the third region 80c via the second region 80b, and water adhering to the +Y direction side of the first region 80a2 moves to the fifth region 80e via the fourth region 80d. In the first protrusion 81, water adhering to the slope on the +Y direction side of the second region 80b moves to the third region 80c, and water adhering to the +Y direction side of the fourth region 80d moves to the fifth region 80e.

[0123] As a result, it is possible to reduce the movement of water adhering to the slopes on the +Y direction side of the pair of first protrusions 81 between the first lens portion 71 and the second lens portion 72. In this regard, it is effective to provide first regions 80a1 and 80a2 between the first lens portion 71 and the second lens portion 72.

[0124] The dimensions of the pair of first protrusions 81 in the Y direction increase as they move away from the center of the first lens portion 71 in the X direction. In this case, it becomes easier to design the pair of first protrusions 81 such that the area of ​​the slope on the +Y direction side of the pair of first protrusions 81 increases as they move away from the center of the first lens portion 71 in the X direction. As the area of ​​the slope of the first protrusion 81 increases as it moves away from the center of the first lens portion 71, the slope of the first protrusion 81 makes it easier to control the water adhering to the slope as it moves away from the center of the second lens portion 72. As a result, it becomes easier to move the water adhering to the first protrusion 81 away from the center of the first lens portion 71.

[0125] As shown in Figures 3B and 3C, the height of the pair of first protrusions 81 increases as it moves away from the center of the first lens portion 71 in the X direction. In this case as well, similar to the above, water adhering to the slopes on the +Y direction side of the pair of first protrusions 81 tends to move in the direction where the area of ​​the slopes increases.

[0126] As shown in Figure 3A, the outer edges of the pair of first protrusions 81 on the +Y direction side have portions that extend further away from the center of the first lens portion 71 in the X direction as they move away from the center of the second lens portion 72 in the Y direction. Therefore, water adhering to the slopes on the +Y direction side of the pair of first protrusions 81 is easily moved along these slopes.

[0127] The outer edges of the pair of first protrusions 81 on the -Y direction side also have portions that extend so that they move away from the center of the first lens portion 71 in the X direction as they move away from the center of the second lens portion 72 in the Y direction. This is to ensure that the pair of first protrusions 81 are spaced apart from the first lens portion 71.

[0128] The third region 80c is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the third region 80c is easily discharged to the outside of the surface 61a of the base 61. Similarly, the fifth region 80e is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the fifth region 80e is easily discharged to the outside of the surface 61a of the base 61.

[0129] The water-repellent properties of the surface of the pair of first protrusions 81 may be higher than those of the peripheral portion of the surface 61a of the base 61 that surrounds the pair of first protrusions 81. In this case, water adhering to the slope on the +Y direction side of the first protrusions 81 will be more likely to move downward along the first protrusions 81.

[0130] <Pair of second protrusions 82> As shown in Figure 3A, a portion of each second protrusion 82 is located between the second lens portion 72 and the third lens portion 73 in a plan view. In the Y direction, each second protrusion 82 overlaps with both the second lens portion 72 and the third lens portion 73. Each second protrusion 82 has a portion that overlaps with the second lens portion 72 in the X direction, but does not have a portion that overlaps with the first lens portion 71 and the third lens portion 73 in the X direction.

[0131] As shown in Figure 3C, the pair of second protrusions 82 are lower than the heights of the second lens portion 72 and the third lens portion 73, respectively. Therefore, the light emitted from each of the second lens portion 72 and the third lens portion 73 is not easily blocked by the pair of second protrusions 82. The height of each second protrusion 82 may be, for example, 1 / 2, 1 / 3, or 1 / 4 of the height of each of the second lens portion 72 and the third lens portion 73, respectively.

[0132] The pair of second protrusions 82 do not extend as far in the Z direction from the base 61 as the second lens portion 72 and the third lens portion 73. In other words, the portion of the second lens portion 72 and the portion of the third lens portion 73 that are furthest to the +Z direction are located further to the +Z direction than the portion of the second protrusion 82 that are furthest to the +Z direction.

[0133] The pair of second protrusions 82 have a sixth region 80f1 and 80f2, a seventh region 80g, an eighth region 80h, a ninth region 80i, and a tenth region 80j, as shown in Figure 3A. The pair of second protrusions 82 shown in Figure 3A differ from the second protrusions 82 shown in Figure 2B in that they have a sixth region 80f1 and 80f2 instead of a sixth region 80f.

[0134] The sixth regions 80f1 and 80f2 are located apart from each other between the second lens portion 72 and the third lens portion 73 in a plan view. The sixth regions 80f1 and 80f2 overlap both the second lens portion 72 and the third lens portion 73 in the Y direction. The second convex portion 82 on the +X direction side has the sixth region 80f1, the seventh region 80g, and the eighth region 80h. The second convex portion 82 on the -X direction side has the sixth region 80f2, the ninth region 80i, and the tenth region 80j. The seventh region 80g, the eighth region 80h, the ninth region 80i, and the tenth region 80j are described with reference to Figure 2B.

[0135] In Embodiment 2, unlike Embodiment 1, neither of the sixth regions 80f1 and 80f2 included in the pair of second protrusions 82 coincides with the straight line connecting the center of the second lens portion 72 and the center of the third lens portion 73 in a plan view. Even in this case, in the pair of second protrusions 82, water adhering to the slope on the +Y direction side of the sixth region 80f1 moves to the eighth region 80h via the seventh region 80g, and water adhering to the +Y direction side of the sixth region 80f2 moves to the tenth region 80j via the ninth region 80i. In the second protrusion 82, water adhering to the slope on the +Y direction side of the seventh region 80g moves to the eighth region 80h, and water adhering to the +Y direction side of the ninth region 80i moves to the tenth region 80j.

[0136] As a result, it is possible to reduce the movement of water adhering to the slopes on the +Y direction side of the pair of second protrusions 82 between the second lens portion 72 and the third lens portion 73. In this regard, it is effective to provide sixth regions 80f1 and 80f2 between the second lens portion 72 and the third lens portion 73.

[0137] The dimensions of the pair of second protrusions 82 in the Y direction increase as they move away from the center of the second lens portion 72 in the X direction. In this case, it becomes easier to design the pair of second protrusions 82 such that the area of ​​the slope on the +Y direction side of the pair of second protrusions 82 increases as they move away from the center of the second lens portion 72 in the X direction. As the area of ​​the slope of the second protrusion 82 increases as it moves away from the center of the second lens portion 72, the slope of the second protrusion 82 makes it easier to control the water adhering to the slope as it moves away from the center of the second lens portion 72. As a result, it becomes easier to move the water adhering to the second protrusion 82 away from the center of the second lens portion 72.

[0138] As shown in Figure 3C, the height of the pair of second protrusions 82 increases as it moves away from the center of the second lens portion 72 in the X direction. In this case as well, similar to the above, water adhering to the slopes on the +Y direction side of the pair of second protrusions 82 tends to move in the direction where the area of ​​the slopes increases.

[0139] As shown in Figure 3A, the outer edges of the pair of second protrusions 82 on the +Y direction side have portions that extend further away from the center of the third lens portion 73 in the Y direction and further away from the center of the second lens portion 72 in the X direction. Therefore, water adhering to the slopes on the +Y direction side of the pair of second protrusions 82 is easily moved along the pair of second protrusions 82.

[0140] The outer edges of the pair of second protrusions 82 on the -Y direction side also have portions that extend so that they move away from the center of the second lens portion 72 in the X direction as they move away from the center of the third lens portion 73 in the Y direction. This is to ensure that the pair of second protrusions 82 are provided at a distance from the second lens portion 72.

[0141] The eighth region 80h is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the eighth region 80h is easily discharged to the outside of the surface 61a of the base 61. Similarly, the tenth region 80j is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the tenth region 80j is easily discharged to the outside of the surface 61a of the base 61.

[0142] The water-repellent properties of the surface of the pair of second protrusions 82 may be higher than those of the peripheral portion of the surface 61a of the base 61 that surrounds the pair of second protrusions 82. In this case, water adhering to the slope on the +Y direction side of the second protrusions 82 will be more likely to move downward along the second protrusions 82.

[0143] <Pair of third protrusions 83> Each third protrusion 83 overlaps with the third lens portion 73 in the Y direction, as shown in Figure 3A. However, the overlapping portion is small. Each third protrusion 83 has a portion that overlaps with the third lens portion 73 in the X direction, but does not have a portion that overlaps with the second lens portion 72 in the X direction.

[0144] As shown in Figure 3C, the pair of third protrusions 83 are lower than the height of the third lens portion 73. Therefore, the light emitted from the third lens portion 73 is not easily blocked by the pair of third protrusions 83. The height of each third protrusion 83 may be, for example, 1 / 2, 1 / 3, or 1 / 4 of the respective heights of the second lens portion 72 and the third lens portion 73.

[0145] The pair of third protrusions 83 do not extend as far in the Z direction from the base 61 as the third lens portion 73. In other words, the portion of the third lens portion 73 that is furthest towards the +Z direction is located further towards the +Z direction than the portion of each third protrusion 83 that is furthest towards the +Z direction.

[0146] The pair of third protrusions 83 have a 12th region 80l, a 13th region 80m, a 14th region 80n, and a 15th region 80o, as shown in Figure 3A. The third protrusion 83 on the +X side has a 12th region 80l and a 13th region 80m. The third protrusion 83 on the -X side has a 14th region 80n and a 15th region 80o. The 12th region 80l, the 13th region 80m, the 14th region 80n, and the 15th region 80o are described with reference to Figure 2B.

[0147] Of the surface 61a of the base 61, water adhering to the +Y direction side with respect to the third protrusion 83 on the +X direction side moves along the slope of the third protrusion 83 on the +Y direction side, through the 12th region 80l and the 13th region 80m in that order.

[0148] Of the surface 61a of the base portion 61, water adhering to the +Y direction side with respect to the third protrusion 83 on the -X direction side moves along the slope of the third protrusion 83 on the +Y direction side, through the 14th region 80n and the 15th region 80o in that order.

[0149] The dimensions of the pair of third protrusions 83 in the Y direction increase as they move away from the center of the third lens portion 73 in the X direction. In this case, it becomes easier to design the pair of third protrusions 83 such that the area of ​​the slope on the +Y direction side of the pair of third protrusions 83 increases as they move away from the center of the third lens portion 73 in the X direction. As the area of ​​the slope of the third protrusion 83 increases as it moves away from the center of the third lens portion 73, the slope of the third protrusion 83 makes it easier to control the water adhering to the slope as it moves away from the center of the third lens portion 73. As a result, it becomes easier to move the water adhering to the third protrusion 83 away from the center of the third lens portion 73.

[0150] As shown in Figure 3C, the height of the pair of third protrusions 83 increases as it moves away from the center of the third lens portion 73 in the X direction. In this case as well, similar to the above, water adhering to the slopes on the +Y direction side of the pair of third protrusions 83 tends to move in the direction where the area of ​​the slopes increases.

[0151] As shown in Figure 3A, the outer edges of the pair of third protrusions 83 on the +Y direction side have portions that extend away from the center of the third lens portion 73 in the X direction as they move away from the outer edge located on the +Y direction side of the surface 61a of the base portion 61 in the Y direction. Therefore, water adhering to the +Y direction side of the surface 61a of the base portion 61 with respect to the pair of third lens portions 73 is easily moved downward along the slope on the +Y direction side of the pair of third protrusions 83.

[0152] The outer edges of the pair of third protrusions 83 on the -Y direction also have portions that extend away from the center of the third lens portion 73 in the X direction as they move away from the outer edge located on the +Y direction side of the surface 61a of the base portion 61 in the Y direction. This is to provide the pair of third protrusions 83 at a distance from the third lens portion 73.

[0153] The 13th region 80m is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the 13th region 80m is easily discharged to the outside of the surface 61a of the base 61. Similarly, the 15th region 80o is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the 15th region 80o is easily discharged to the outside of the surface 61a of the base 61.

[0154] The water-repellent properties of the surface of the pair of third protrusions 83 may be higher than those of the peripheral portion of the surface 61a of the base 61 that surrounds the pair of third protrusions 83. In this case, water adhering to the slope on the +Y direction side of the third protrusions 83 will be more likely to move downward along the third protrusions 83.

[0155] The pair of third protrusions 83 do not drain water between the multiple lens portions 70, so they are not necessarily required. On the other hand, if the pair of third protrusions 83 are provided, it is possible to reduce the movement of water adhering to the +Y direction side of the surface 61a of the base portion 61 with respect to the pair of third protrusions 83 to the second protrusion 82. As a result, water is less likely to adhere to the second protrusion 82.

[0156] <Example of modification> In Embodiment 2, the width of each protrusion 80 increases as it approaches the outer edge of the surface 61a of the base 61, but the invention is not limited to this example. The width of each protrusion 80 may be constant, or it may become narrower as it approaches the outer edge of the surface 61a of the base 61.

[0157] In Embodiment 2, the height of each protrusion 80 increases as it moves away from the center of the lens portion 70 located near each protrusion 80 in the X direction, but this is not the only example. The height of each protrusion 80 may be constant, or it may decrease as it moves away from the center of the lens portion 70 located near each protrusion 80 in the X direction.

[0158] In Embodiment 2, the outer edge of each protrusion 80 is curved, but the invention is not limited to this example. The outer edge of each protrusion 80 may be formed by at least one straight line.

[0159] In Embodiment 2, the surface of each protrusion 80 is in contact with the outer edge of the surface 61a of the base 61, but the embodiment is not limited to this example. The surfaces of some or all of the protrusions 80 do not need to be in contact with the outer edge of the surface 61a of the base 61.

[0160] Based on the above, in the light-emitting device 1000B according to Embodiment 2, similar to the light-emitting device 1000A according to Embodiment 1, even if water adheres to the surface, water is less likely to accumulate between the multiple lens portions 70. Therefore, it is possible to reduce the change in the light distribution characteristics of the light-emitting device 1000B due to water accumulated between the lens portions 70.

[0161] (Embodiment 3) In the following, a light-emitting device according to Embodiment 3 of the present disclosure will be described with reference to Figures 4A to 4C. Figures 4A to 4C are a plan view from the +Z direction, a side view from the -Y direction, and a side view from the +X direction, respectively, schematically showing the configuration of a light-emitting device according to exemplary Embodiment 3 of the present disclosure.

[0162] In the light-emitting device 1000C shown in Figures 4A to 4C, a pair of protrusions 80 extending along the Y direction are provided on the surface 61a of the base 61. Each lens portion 70 is located between the pair of protrusions 80 in a plan view, as shown in Figure 4A.

[0163] As shown in Figure 4B, the pair of protrusions 80 are lower than the height of each lens portion 70. Therefore, the light emitted from each lens portion 70 is not easily blocked by the pair of protrusions 80. The height of each protrusion 80 may be, for example, 1 / 2, 1 / 3, or 1 / 4 of the height of each lens portion 70.

[0164] The pair of protrusions 80 do not extend as far in the +Z direction from the base 61 as each lens portion 70. In other words, the part of each lens portion 70 that is closest to the +Z direction is located further towards the +Z direction than the part of the pair of protrusions 80 that is closest to the +Z direction.

[0165] The cross-sectional shape of each protrusion 80 in the XZ plane is triangular. Of the pair of protrusions 80, the apex of the protrusion 80 located on one side coincides with the outer edge of the surface 61a of the base 61.

[0166] It is not necessary to provide both of the pair of protrusions 80. Only one of the pair of protrusions 80 may be provided.

[0167] As shown in Figure 4A, the protrusion 80 on the +X direction side has a second region 80b that does not overlap with the first lens portion 71 and the second lens portion 72 in the X direction, and a third region 80c that is connected to the second region 80b and overlaps with the first lens portion 71 in the X direction. The protrusion 80 on the +X direction side further has a seventh region 80g that does not overlap with the second lens portion 72 and the third lens portion 73 in the X direction, and an eighth region 80h that is connected to the seventh region 80g and the second region 80b and overlaps with the second lens portion 72 in the X direction. The protrusion 80 on the +X direction side further has a thirteenth region 80m that is connected to the seventh region 80g and overlaps with the third lens portion 73 in the X direction.

[0168] - The protrusion 80 on the X-direction side has a fourth region 80d that does not overlap with the first lens portion 71 and the second lens portion 72 in the X-direction, and a fifth region 80e that is connected to the fourth region 80d and overlaps with the first lens portion 71 in the X-direction. - The protrusion 80 on the X-direction side further has a ninth region 80i that does not overlap with the second lens portion 72 and the third lens portion 73 in the X-direction, and a tenth region 80j that is connected to the ninth region 80i and the fourth region 80d and overlaps with the second lens portion 72 in the X-direction. - The protrusion 80 on the X-direction side further has a fifteenth region 80o that is connected to the ninth region 80i and overlaps with the third lens portion 73 in the X-direction.

[0169] The third region 80c and the fifth region 80e are located on the +X and -X sides, respectively, with respect to the first lens section 71 in a plan view. The eighth region 80h and the tenth region 80j are located on the +X and -X sides, respectively, with respect to the second lens section 72 in a plan view. The thirteenth region 80m and the fifteenth region 80o are located on the +X and -X sides, respectively, with respect to the third lens section 73 in a plan view.

[0170] Water adhering to the surface 61a of the base 61 near the protrusion 80 on the +X or -X side is moved to the surface of the protrusion 80 due to the surface tension on the same side as the water, and then, for example, moves downward and is discharged to the outside of the surface 61a of the base 61. Therefore, it is possible to reduce the movement of water adhering to the surface 61a of the base 61 near the protrusion 80 on the +X or -X side between the multiple lens portions 70.

[0171] The surface of each protrusion 80 is in contact with the outer edge of the surface 61a of the base 61. Therefore, water adhering to the surface of each protrusion 80 is easily discharged to the outside of the surface 61a of the base 61.

[0172] The hydrophilicity of the surface of the pair of protrusions 80 may be higher than that of the peripheral portion of the surface 61a of the base 61 that surrounds the pair of protrusions 80. In this case, the surface of the pair of protrusions 80 is more easily wetted by water than the surface 61a of the base 61. Therefore, water adhering to the surface 61a of the base 61 near the protrusions 80 on the +X or -X side is more likely to move to the surface of the protrusions 80 on the same side.

[0173] The higher the hydrophilicity of a surface, the smaller the contact angle of water adhering to the surface, making the surface less water-repellent. In this context, hydrophilicity means that the contact angle is less than 90°.

[0174] The hydrophilicity of the side surface of the base 61 may be higher than that of the surface of each protrusion 80. In this case, the side surface of the base 61 is more easily wetted by water than each protrusion 80. Therefore, water in contact with the surface of each protrusion 80 is more easily moved to the side surface of the base 61 and discharged to the outside of the surface 61a of the base 61.

[0175] Based on the above, in the light-emitting device 1000C according to Embodiment 3, similar to the light-emitting device 1000A according to Embodiment 1, even if water adheres to the surface, water is less likely to accumulate between the multiple lens portions 70. Therefore, it is possible to reduce the change in the light distribution characteristics of the light-emitting device 1000C due to water accumulated between the lens portions 70.

[0176] (Embodiment 4) The following describes the light-emitting device according to Embodiment 4 of the present disclosure with reference to Figures 5A to 5C. Figures 5A to 5C are a plan view from the +Z direction, a side view from the -Y direction, and a side view from the +X direction, respectively, schematically showing the configuration of the light-emitting device according to exemplary Embodiment 4 of the present disclosure. The light-emitting device 1000D shown in Figures 5A to 5C differs from the light-emitting device 1000C shown in Figures 4A to 4C in the following respects.

[0177] Each pair of protrusions 80 has multiple portions located between the multiple lens portions 70 in a plan view. The cross-sectional shape of each protrusion 80 in the XZ plane is trapezoidal.

[0178] As shown in Figure 5A, the protrusion 80 on the +X direction side has a second region 80b, a third region 80c, a seventh region 80g, an eighth region 80h, and a thirteenth region 80m, in addition to a first region 80a1 and a sixth region 80f1.

[0179] The first region 80a1 is located between the first lens portion 71 and the second lens portion 72 in a plan view. The first region 80a1 overlaps both the first lens portion 71 and the second lens portion 72 in the Y direction. The first region 80a1 does not overlap with the straight line connecting the center of the first lens portion 71 and the center of the second lens portion 72 in a plan view. The second region 80b is connected to the first region 80a1.

[0180] The sixth region 80f1 is located between the second lens section 72 and the third lens section 73 in a plan view. The sixth region 80f1 is located between the second lens section 72 and the third lens section 73 in a plan view. The sixth region 80f1 overlaps both the second lens section 72 and the third lens section 73 in the Y direction. The sixth region 80f1 does not overlap with the straight line connecting the center of the second lens section 72 and the center of the third lens section 73 in a plan view. The seventh region 80g is connected to the sixth region 80f1.

[0181] As shown in Figure 5A, the protrusion 80 on the X-direction side has a fourth region 80d, a fifth region 80e, a ninth region 80i, a tenth region 80j, and a fifteenth region 80o, in addition to a first region 80a2 and a sixth region 80f2.

[0182] The first region 80a2 is located between the first lens portion 71 and the second lens portion 72 in a plan view. The first region 80a2 overlaps both the first lens portion 71 and the second lens portion 72 in the Y direction. In a plan view, the first region 80a2 does not overlap with the straight line connecting the center of the first lens portion 71 and the center of the second lens portion 72. The fourth region 80d is connected to the first region 80a2.

[0183] The sixth region 80f2 is located between the second lens section 72 and the third lens section 73 in a plan view. In the Y direction, the sixth region 80f2 overlaps with both the second lens section 72 and the third lens section 73. In a plan view, the sixth region 80f2 does not overlap with the straight line connecting the center of the second lens section 72 and the center of the third lens section 73. The ninth region 80i is connected to the sixth region 80f2.

[0184] It is not necessary to provide both of the pair of protrusions 80. Only one of the pair of protrusions 80 may be provided. Alternatively, one of the pair of protrusions 80 may have a shape that extends along the Y direction, as shown in Figure 4A.

[0185] Water adhering to the surface 61a of the base 61 near the protrusion 80 on the +X or -X side is moved to the surface of the protrusion 80 due to the surface tension on the same side as the water, and then, for example, moves downward and is discharged to the outside of the surface 61a of the base 61. Therefore, it is possible to reduce the movement of water adhering to the surface 61a of the base 61 near the protrusion 80 on the +X or -X side between the multiple lens portions 70.

[0186] The surface tension of the portion of the pair of protrusions 80 located between the multiple lens portions 70 is stronger than the surface tension of the portion of the base portion 61a located between the multiple lens portions 70. Therefore, water adhering to the portion of the base portion 61a located between the multiple lens portions 70 is more likely to move to the surface of the portion of the pair of protrusions 80 located between the multiple lens portions 70.

[0187] The hydrophilicity of the surface of the pair of protrusions 80 may be higher than that of the peripheral portion of the surface 61a of the base 61 that surrounds the pair of protrusions 80. In this case, the surface of the pair of protrusions 80 is more easily wetted by water than the surface 61a of the base 61. Therefore, water adhering to the surface 61a of the base 61 near the protrusions 80 on the +X or -X side is more likely to move to the surface of the protrusions 80 on the same side as the water.

[0188] The hydrophilicity of the portion of the base 61's side surface that contacts the surface of each protrusion 80 may be higher than the hydrophilicity of the surface of each protrusion 80. In this case, the portion of the base 61's side surface that contacts the surface of each protrusion 80 is more easily wetted by water than the surface of each protrusion 80. Therefore, water adhering to the surface of each protrusion 80 is more likely to move to the portion of the base 61's side surface that contacts the surface of each protrusion 80. As a result, less water remains on the surface of each protrusion 80 compared to the side surface of the base 61.

[0189] Based on the above, in the light-emitting device 1000D according to Embodiment 4, similar to the light-emitting device 1000A according to Embodiment 1, even if water adheres to the surface, water is less likely to accumulate between the multiple lens portions 70. Therefore, it is possible to reduce the change in the light distribution characteristics of the light-emitting device 1000D due to water accumulated between the lens portions 70.

[0190] (Embodiment 5) In the following, a light-emitting device according to Embodiment 5 of the present disclosure will be described with reference to Figures 6A to 6C. Figures 6A to 6C are a plan view from the +Z direction, a side view from the -Y direction, and a side view from the +X direction, respectively, schematically showing the configuration of a light-emitting device according to exemplary Embodiment 5 of the present disclosure.

[0191] In the light-emitting device 1000E shown in Figures 6A to 6C, a plurality of protrusions 80 are provided on the surface 61a of the base 61. The plurality of protrusions 80 are located apart from each other around the plurality of lens portions 70.

[0192] Each protrusion 80 is lower than the height of each lens portion 70, as shown in Figures 6B and 6C. Therefore, the light emitted from each lens portion 70 is not easily blocked by each protrusion 80. The height of each protrusion 80 may be, for example, 1 / 2, 1 / 3, or 1 / 4 of the height of each lens portion 70.

[0193] Each protrusion 80 does not extend as far in the +Z direction from the base 61 as each lens portion 70. In other words, the part of each lens portion 70 that is closest to the +Z direction is located even further towards the +Z direction than the part of each protrusion 80 that is closest to the +Z direction.

[0194] The multiple protrusions 80 include multiple first protrusions 81 and multiple second protrusions 82, as shown in Figure 6A. The area of ​​each second protrusion 82 in plan view is smaller than the area of ​​each first protrusion 81 in plan view. Thus, the multiple protrusions 80 include multiple types of protrusions 80 with different areas in plan view. The maximum length of the protrusions 80 in the X or Y direction may be, for example, 100 μm or more and 1000 μm or less.

[0195] In Embodiment 5, there are two types of protrusions 80, but the invention is not limited to this example. There may be three or more types of protrusions 80.

[0196] As shown in Figure 6A, the multiple first protrusions 81 each include two first protrusions 81a, the portion of which is located between the first lens portion 71 and the second lens portion 72 in a plan view. In a plan view, the two first protrusions 81a are located on opposite sides of each other with respect to a straight line connecting the center of the first lens portion 71 and the center of the second lens portion. The two first protrusions 81a may or may not be located symmetrically with respect to a straight line connecting the center of the first lens portion 71 and the center of the second lens portion in a plan view.

[0197] The multiple first protrusions 81 further include two first protrusions 81b, each of which a portion is located between the second lens portion 72 and the third lens portion 73 in a plan view. In a plan view, the two first protrusions 81b are located on opposite sides of each other with respect to a straight line connecting the centers of the second lens portion 72 and the third lens portion 73.

[0198] The plurality of second protrusions 82 include two second protrusions 82a located in the vicinity of the first lens portion 71. In a plan view, the first lens portion 71 is located between the two second protrusions 82a. The plurality of second protrusions 82 further include two second protrusions 82b located in the vicinity of the second lens portion 72. In a plan view, the second lens portion 72 is located between the two second protrusions 82b. The plurality of second protrusions 82 further include two second protrusions 82c located in the vicinity of the third lens portion 73. In a plan view, the third lens portion 73 is located between the two second protrusions 82c. The plurality of second protrusions 82 may further include one or more second protrusions 82 that are not located between two adjacent lens portions 70 in a plan view.

[0199] It is not necessary to provide all of the above-mentioned multiple first protrusions 81 and multiple second protrusions 82. For example, at least one of the multiple first protrusions 81 may be provided, or at least one of the multiple second protrusions 82 may be provided.

[0200] Water adhering to the surface 61a of the base 61, between the multiple lens portions 70 and near the multiple first protrusions 81, moves downward along the surface of the multiple first protrusions 81 and is discharged to the outside of the surface 61a of the base 61. The multiple second protrusions 82 help to move the downward-moving water further downward. Therefore, water is less likely to accumulate between the multiple lens portions 70.

[0201] The water-repellent properties of the surfaces of the multiple protrusions 80 may be higher than those of the peripheral portions of the surface 61a of the base 61. In this case, water adhering to the vicinity of the multiple protrusions 80 on the surface 61a of the base 61 is more easily moved downward along the surface of the multiple protrusions 80.

[0202] Based on the above, in the light-emitting device 1000E according to Embodiment 5, similar to the light-emitting device 1000A according to Embodiment 1, even if water adheres to the surface, water is less likely to accumulate between the multiple lens portions 70. Therefore, it is possible to reduce the change in the light distribution characteristics of the light-emitting device 1000E due to water accumulated between the lens portions 70.

[0203] (Embodiment 6) In the following, a light-emitting device according to Embodiment 6 of the present disclosure will be described with reference to Figures 7A to 7C. Figures 7A to 7C are a plan view from the +Z direction, a side view from the -Y direction, and a side view from the +X direction, respectively, schematically showing the configuration of a light-emitting device according to exemplary Embodiment 6 of the present disclosure.

[0204] In the light-emitting device 1000F shown in Figures 7A to 7C, a plurality of protrusions 80 are provided on the surface 61a of the base 61. As shown in Figure 7A, the plurality of protrusions 80 are located apart from each other around the plurality of lens portions 70. The area of ​​the plurality of protrusions 80 in a plan view is the same. The maximum length of the protrusions 80 in the X or Y direction may be, for example, 100 μm or more and 1000 μm or less.

[0205] Each protrusion 80 is lower than the height of each lens portion 70, as shown in Figures 7B and 7C. Therefore, the light emitted from each lens portion 70 is not easily blocked by each protrusion 80. The height of each protrusion 80 may be, for example, 1 / 2, 1 / 3, or 1 / 4 of the height of each lens portion 70.

[0206] Each protrusion 80 does not extend as far in the +Z direction from the base 61 as each lens portion 70. In other words, the part of each lens portion 70 that is closest to the +Z direction is located even further towards the +Z direction than the part of each protrusion 80 that is closest to the +Z direction.

[0207] The multiple protrusions 80 include one or more first protrusions 81 that overlap with any of the multiple lens portions 70 in the Y direction, and one or more second protrusions 82 that do not overlap with any of the multiple lens portions 70 in the Y direction. As shown in Figures 7B and 7C, the height of the first protrusions 81 is smaller than the height of the second protrusions 82. Therefore, the light emitted from each lens portion 70 is not easily blocked by each first protrusion 81.

[0208] One or more first protrusions 81 include two first protrusions 81a, each of which is positioned between the first lens portion 71 and the second lens portion 72 in a plan view, and four first protrusions 81b, each of which is positioned between the first lens portion 71 and the second lens portion 72 in a plan view. The presence of these first protrusions 81a and 81b makes it difficult for water to accumulate between the first lens portion 71 and the second lens portion 72.

[0209] One or more first protrusions 81 further include two first protrusions 81c, each of which is entirely located between the second lens portion 72 and the third lens portion 73 in a plan view, and four first protrusions 81d, each of which is partially located between the second lens portion 72 and the third lens portion 73 in a plan view. The presence of these first protrusions 81c and 81d makes it difficult for water to accumulate between the second lens portion 72 and the third lens portion 73.

[0210] The remaining first protrusions 81 and one or more second protrusions 82 help to move water downwards, away from between the multiple lens portions 70.

[0211] The water-repellent properties of the surfaces of the multiple protrusions 80 may be higher than those of the peripheral portions of the surface 61a of the base 61. In this case, water between the multiple lens portions 70 is easily repelled by the multiple protrusions 80 and moves downward. As a result, water is less likely to accumulate between the multiple lens portions 70.

[0212] Based on the above, in the light-emitting device 1000F according to Embodiment 6, similar to the light-emitting device 1000A according to Embodiment 1, even if water adheres to the surface, water is less likely to accumulate between the multiple lens portions 70. Therefore, it is possible to reduce the change in the light distribution characteristics of the light-emitting device 1000F due to water accumulated between the lens portions 70.

[0213] (Method for manufacturing the molded resin part 60) In the light-emitting devices 1000A to 1000F according to Embodiments 1 to 6, the molded resin portion 60 can be formed, for example, by the following method.

[0214] In the first step, a resin package 100 is prepared containing the components of the light-emitting devices 1000A to 1000F, excluding the molded resin portion 60, i.e., the multiple light-emitting elements 50. The resin package 100 containing the light-emitting elements 50 may be prepared by acquisition or by performing a step of housing the light-emitting elements 50 in the resin package 100. The resin package 100 is immersed in the uncured molded resin portion 60 located in the recess of the casting case. Subsequently, the uncured molded resin portion 60 is cured to form the molded resin portion 60 that covers the resin package 100. Depending on the shape of the recess of the casting case, multiple lens portions 70 and / or convex portions 80 can be formed on the molded resin portion 60.

[0215] (Details of the configuration of the light-emitting device 1000A other than the protruding part 80) The details of the configuration of the light-emitting device 1000A according to Embodiment 1, other than the protrusion 80, will be described below with reference to Figures 8A to 8D. The configuration of the light-emitting device 1000A according to Embodiment 1, other than the protrusion 80, is also disclosed in Patent Document 1. All of the contents of that disclosure are incorporated herein by reference.

[0216] Figure 8A is a schematic plan view taken from the +Z direction showing the configuration of the light-emitting device 1000A according to Embodiment 1 with the base portion 61 omitted. Figure 8B is a schematic plan view taken from the +Z direction showing the configuration of the resin package 100 with multiple light-emitting elements 50 housed inside. Figures 8C and 8D are cross-sectional views taken along the lines VIIIC-VIIIC and VIIID-VIIID of the resin package 100 shown in Figure 8B, respectively. Figures 9A and 9B are schematic side views taken from the -Y direction and +X direction showing the configuration of the light-emitting device 1000A according to Embodiment 1, for illustrating the shapes of the resin package 100 and the base portion 61, respectively.

[0217] The light-emitting device 1000A includes a plurality of light-emitting elements 50, a resin package 100, and a molded resin part 60, as shown in Figure 8A, a reflective member 150 and light-absorbing members 160 and 190.

[0218] The components of the light-emitting device 1000A are described below.

[0219] <100 Resin Packages> As shown in Figure 8A, the shape of the main surface 100a of the resin package 100 in plan view is quadrilateral. Each side of the quadrilateral of the main surface 100a is substantially parallel to the X or Y direction. However, the shape of the main surface 100a in plan view may be other than quadrilateral, for example, it may be a roughly triangular, roughly quadrilateral, roughly pentagonal, roughly hexagonal, or other polygonal shape, or a curved shape such as a circular or elliptical shape. If the shape of the main surface 100a in plan view is polygonal, some or all of the corners of the polygon may be rounded.

[0220] As shown in Figures 8B to 8D, the main surface 100a of the resin package 100 has a plurality of mounting areas 20 defined by a resin member 40 and a plurality of pairs of leads 10. The mounting area 20 is an area for mounting at least one light-emitting element 50, as shown in Figure 8B. The mounting area 20 is a recess having a bottom surface 20A and an inner surface 20B surrounding the bottom surface, as shown in Figure 8C. The bottom surface 20A includes an exposed area 30 for at least one lead. As shown in Figure 8C, the inner surface 20B of the mounting area 20 is integrally formed with the resin member 40 that constitutes part of the bottom surface 20A. Alternatively, the inner surface of the mounting area 20 may be made of a different material from the resin member 40 that constitutes part of the bottom surface 20A. The mounting area 20 may be an area on which a reflective member 150 or a light-absorbing member 190, as shown in Figure 8A, is placed. Wires may be connected within the mounting area 20.

[0221] As shown in Figure 8B, the multiple mounting regions 20 include a first mounting region 21 on which the first light-emitting element 51 is placed, and a second mounting region 22 on which the second light-emitting element 52 and the third light-emitting element are placed.

[0222] In a plan view, the main surface 100a has a resin member 40 between the first mounting area 21 and the second mounting area 22, as shown in Figure 8B. By placing a resin member 40 with a low coefficient of thermal expansion between the light-emitting elements 50, it is possible to reduce the stress on the light-emitting elements 50 that occurs during the manufacturing of the molded resin part 60, etc.

[0223] The main surface 100a of the resin package 100 further has a plurality of wire connection areas 26 defined by the resin member 40 and a plurality of pairs of leads 10. The wire connection areas 26 are areas for connecting wires. As shown in Figure 8C, the wire connection areas 26 are recesses having a bottom surface 20C and an inner surface 20D surrounding the bottom surface 20C. Within the wire connection areas 26 are exposed areas 30 in which the leads are exposed. The wire connection areas 26 can be any area in which the light absorbing member 160 is placed. Because the main surface 100a of the resin package 100 has wire connection areas 26, different members can be placed in the mounting area 20.

[0224] As shown in Figure 8C, the inner surface 20D has a first inner surface 20D1, a second inner surface 20D2, and a stepped surface 20DS. The first inner surface 20D1 is continuous with the bottom surface 20C. The second inner surface 20D2 is continuous with the main surface 100a. The stepped surface 20DS connects the first inner surface 20D1 and the second inner surface 20D2. Similar to the mounting area 20, it may have an inner surface made of a material other than the resin member 40. As shown in Figure 8B, in plan view, the wire connection area 26 is arranged adjacent to and separated from the mounting area 20. The second mounting area 22 is arranged between the two wire connection areas 26.

[0225] As shown in Figure 9A, the outer portion 100c of the resin package 100 has a first stepped surface st1. The first stepped surface st1 faces the same direction as the main surface 100a. The first stepped surface st1 is located on the back surface 100b side of the outermost part of the extended portion 64 of the base portion 61. The outer portion 100c of the resin package 100 further has a second stepped surface st2. In a plan view, the second stepped surface st2 is located further out than the first stepped surface st1. The outer portion 100c of the resin package 100 has a second surface p2 that connects the first stepped surface st1 and the second stepped surface st2. The outer portion 100c of the resin package 100 has a third surface p3 that connects the second stepped surface st2 and the back surface 100b. A recess may be located at the position where the second stepped surface st2 and the second surface p2 intersect.

[0226] <Resin component 40> The resin member 40 has insulating properties to electrically isolate the light-emitting element 50 from the outside. Preferably, the color of at least the portion of the resin member 40 located on the main surface 100a side of the resin package 100, i.e., the light emission observation surface side, is a dark color such as black or gray. For example, the resin member 40 may be colored in a dark color.

[0227] The resin member 40 only needs to have a shape capable of holding at least a portion of the multiple pairs of leads 10, and is not limited to the shape shown. Preferably, the resin member 40 integrally fixes the multiple pairs of leads (in this case, three pairs of leads).

[0228] <Lead 10> Each pair of leads 10 is conductive and functions as an electrode for supplying power to the corresponding light-emitting element 50. Multiple pairs of leads 10 have exposed regions 30 that are exposed from the resin member 40.

[0229] In the light-emitting device 1000A, as shown in Figure 8C, the lead 10 is bent to have a first portion 10a located on the main surface 100a side of the resin package 100, a second portion 10b located on the back surface 100b side of the resin package 100, and a third portion 10c located between the first portion 10a and the second portion 10b and extending along the outer portion 100c of the resin package 100. At least a portion of the second portion 10b of the lead 10 is exposed on the back surface 100b of the resin package 100, and serves as the mounting surface when fixing the light-emitting device 1000A to the mounting substrate 1 in the display device 2000 shown in Figure 1. Preferably, the mounting surface of the lead 10 is flush with the lower surface of the resin member 40.

[0230] As shown in Figure 8A, on the main surface 100a, the ends of the two leads constituting the pair of leads 10 are spaced apart from each other and facing each other. The arrangement, shape, and number of leads used in the light-emitting device 1000A are not particularly limited.

[0231] <50 light-emitting elements> Each light-emitting element 50 is positioned in the exposed area 30 of the mounting area 20, as shown in Figure 8B. The first light-emitting element 51 is positioned in the exposed area 30 of the pair of first leads 11 in the first mounting area 21. The first light-emitting element 51 is electrically connected to the pair of first leads 11 using wires 31, as shown in Figure 8A.

[0232] As shown in Figure 8B, the second light-emitting element 52 is positioned in the second mounting region 22, within the exposed region 30 of the pair of second leads 12. As shown in Figure 8A, the second light-emitting element 52 is electrically connected to the pair of second leads 12 using wires 32.

[0233] As shown in Figure 8B, the third light-emitting element 53 is positioned in the second mounting area 22 within the exposed area 30 of the pair of third leads 13. As shown in Figure 8A, the third light-emitting element 53 is electrically connected to the pair of third leads 13 using wires 33.

[0234] The shape of the light-emitting element 50 in plan view is, for example, rectangular. There are no particular restrictions on the size of the light-emitting element 50. The length and width of the light-emitting element 50 are, for example, 100 μm or more and 1000 μm or less. For example, in plan view, the light-emitting element 50 has a square shape with sides of 320 μm.

[0235] For example, the first light-emitting element 51 is a light-emitting element that emits light substantially only from its top surface, while the second light-emitting element 52 and the third light-emitting element 53 are light-emitting elements that emit light from both their top and side surfaces. It should be noted that all of the multiple light-emitting elements 50 may emit light not only from their top surfaces but also from their side surfaces.

[0236] As shown in Figure 8B, the first light-emitting element 51 is positioned at the center of the first mounting area 21 in a plan view. The first light-emitting element 51 is a red light-emitting element that emits red light. The second light-emitting element 52 is positioned offset to the -Y direction away from the center of the second mounting area 22 in a plan view. The second light-emitting element 52 is a green light-emitting element that emits green light. The third light-emitting element 53 is positioned offset to the +Y direction away from the center of the second mounting area 22 in a plan view. The third light-emitting element 53 is a blue light-emitting element that emits blue light.

[0237] The second light-emitting element 52 may be a blue light-emitting element, and the third light-emitting element 53 may be a green light-emitting element. For example, the red light-emitting element emits light with an emission wavelength in the range of 610 nm to 700 nm, the blue light-emitting element emits light with an emission wavelength in the range of 430 nm to 490 nm, and the green light-emitting element emits light with an emission wavelength in the range of 495 nm to 565 nm. The emission wavelength refers to the peak emission wavelength of the light emitted from each light-emitting element.

[0238] The emission wavelengths of the multiple light-emitting elements 50 can be selected, for example, so that white light is obtained when all of the multiple light-emitting elements 50 are lit. Furthermore, by using multiple light-emitting elements 50 that emit red light, blue light, and green light, full-color display becomes possible. The number of multiple light-emitting elements 50 and the combination of emission colors are just examples and are not limited to these examples. The emission wavelengths of the multiple light-emitting elements 50 may all be different, or some of the light-emitting elements 50 may have the same emission wavelength.

[0239] When the light-emitting device 1000A is used in the display device 2000 shown in Figure 1, the first light-emitting element 51 emits red light, the second light-emitting element 52 emits green light, and the third light-emitting element 53 emits blue light.

[0240] For blue and green light-emitting elements, light-emitting elements using ZnSe or nitride-based semiconductors (InXAlYGa1-X-YN, 0≦X, 0≦Y, X+Y≦1) can be used. For example, a light-emitting element in which a semiconductor layer containing GaN is formed on a support substrate such as sapphire may be used. For red light-emitting elements, semiconductors such as GaAs, AlInGaP, and AlGaAs can be used. For example, a light-emitting element in which a semiconductor layer containing AlInGaP is formed on a support substrate such as silicon, aluminum nitride, or sapphire may be used. Furthermore, light-emitting elements made of other materials can also be used. The composition, emission color, size, and number of light-emitting elements can be appropriately selected according to the purpose.

[0241] Furthermore, a phosphor that converts the wavelength of light emitted by the light-emitting element may be placed around the light-emitting element, which is made of a nitride-based semiconductor or the like. This makes it possible to obtain any desired light emission. In this specification, "light-emitting element 50" includes not only a light-emitting element made of a nitride-based semiconductor or the like, but also an element made of a light-emitting element and a phosphor. For example, the first light-emitting element 51, the second light-emitting element 52, and the third light-emitting element 53 may all have a semiconductor chip that emits blue light. In this case, by placing a phosphor around the semiconductor chip in at least two of these light-emitting elements, the light emission colors of the first light-emitting element 51, the second light-emitting element 52, and the third light-emitting element 53 can be made to differ from each other.

[0242] As shown in Figure 8B, the first light-emitting element 51, the second light-emitting element 52, and the third light-emitting element 53 are positioned in the exposed areas 30 of the pair of first leads 11, the pair of second leads 12, and the pair of third leads 13, respectively. This separates the heat dissipation paths of the first light-emitting element 51, the second light-emitting element 52, and the third light-emitting element 53, allowing for efficient heat dissipation from each light-emitting element 50.

[0243] The wire 31 shown in Figure 8A, which electrically connects the first light-emitting element 51 to a pair of first leads 11, is located within the first mounting area 21 shown in Figure 8B. The wire 32 shown in Figure 8A, which electrically connects the second light-emitting element 52 to a pair of second leads 12, is connected to the wire connection area 26 shown in Figure 8B. The same applies to the wire 33 shown in Figure 8A, which electrically connects the third light-emitting element 53 to a pair of third leads 13.

[0244] <Reflective material 150> As shown in Figure 8A, in a plan view, the reflective member 150 is positioned around the second light-emitting element 52 and the third light-emitting element 53. The reflective member 150 reflects the light emitted from the sides of the second light-emitting element 52 and the third light-emitting element 53 and directs it in the +Z direction. This improves the utilization efficiency of the light emitted from the second light-emitting element 52 and the third light-emitting element 53.

[0245] The light-emitting device 1000A may further include a translucent resin member between the reflective member 150 and the light-emitting element 50 and the molded resin part 60 shown in Figures 9A and 9B. For example, the translucent resin member is positioned between the inner surfaces 20D shown in Figure 8C, which face each other in a cross-sectional view. It is preferable that the translucent resin member covers the second inner surface 20D2 exposed from the light-absorbing member 190. The same material as that used for the molded resin part 60 can be used as the material for the translucent resin member.

[0246] <Lens section 70> The lens portion 70 is part of the molded resin portion 60, which is a covering member. The lens portion 70, which has a light distribution function, makes it possible to create a light-emitting device 1000A with a high light distribution in the +Z direction. The planar shape of each lens portion 70 is, for example, elliptical or circular. As shown in Figure 8A, the planar shape of each lens portion 70 is elliptical, with the major axis of the ellipse extending in the X direction and the minor axis extending in the Y direction. Therefore, a light distribution that is wide in the X direction and narrow in the Y direction is obtained. A light-emitting device 1000A having such a light distribution can be particularly suitably used in a display device 2000 shown in Figure 1, such as an LED display. In a side view seen from the X or Y direction, the outer edge of the lens portion 70 may consist only of a curved portion such as an elliptical arc or arc, or it may have a straight portion in addition to a curved portion such as an elliptical arc or arc. The straight portion may be located between the curved portion and the surface 61a of the base portion 61 shown in Figures 9A and 9B. For example, the lens portion 70 may have a shape in which a part of a sphere (e.g., a hemisphere) is placed on a frustum of a cone, or a shape in which a part of an ellipsoid is placed on a frustum of an ellipse. The shape and arrangement of each lens portion 70 in plan view can be appropriately selected considering the light distribution and focusing properties of light.

[0247] The first light emitted by the first light-emitting element 51 passes through the first lens section 71 and is emitted in the +Z direction of the light-emitting device 1000A. The direction and distribution of the emitted first light are controlled by the first lens section 71. Similarly, the second light emitted by the second light-emitting element 52 passes through the second lens section 72, and the third light emitted by the third light-emitting element 53 passes through the third lens section 73. The second lens section 72 and the third lens section 73 control the light distribution of the second and third light, respectively.

[0248] In a plan view, the centers of the first lens portion 71, the second lens portion 72, and the third lens portion 73, which are arranged in the Y direction, may be located on a line substantially parallel to the Y direction. Note that the arrangement of the lens portion 70 is not limited to this example. For example, the center of the lens portion located in the center in the X or Y direction among the first lens portion 71, the second lens portion 72, and the third lens portion 73 does not have to be located on a line connecting the centers of the other two lens portions.

[0249] <Base 61> The base portion 61 is part of the molded resin portion 60, which is a covering member. As shown in Figures 9A and 9B, the base portion 61 has a surface 61a in addition to a side portion 61b. The side portion 61b covers a portion of the outer portion 100c of the resin package 100 in the direction from the surface 61a of the base portion 61 toward the back surface 100b of the resin package 100. The side portion 61b continuously covers from the surface 61a of the base portion 61 toward a portion of the outer portion 100c of the resin package 100. The lens portion 70 and the base portion 61 can be made of the same material.

[0250] The surface roughness of the base portion 61 in the portion that does not include the protrusion 80 is not particularly limited, but it is preferable that it be greater from the viewpoint of reducing glare on the surface 61a of the base portion 61. Of the surface 61a of the base portion 61, it is preferable that the surface roughness of at least the portion that overlaps with the reflective member 150 in a plan view is greater than the surface roughness of the lens portion 70. This makes it possible to further improve the contrast ratio of the light-emitting device 1000A.

[0251] <Light absorbing members 160, 190> It is preferable to arrange a light-absorbing member 190 around the first light-emitting element 51. By arranging the light-absorbing member 190, reflection by the pair of first leads can be reduced, thereby reducing the decrease in contrast ratio.

[0252] As shown in Figures 8A and 8B, a light-absorbing member 160 is placed in the wire connection area 26. By placing the light-absorbing member 160, reflections from the pair of second leads 12 and the pair of third leads 13 can be reduced. The light-absorbing member 160 can be made of the same material as the light-absorbing member 190.

[0253] <Convex part 47> As shown in Figure 8B, the light-emitting device 1000A has a plurality of protrusions 47 arranged within the wire connection area 26 in a plan view. In a plan view, it is preferable that a portion of each protrusion 47 is arranged to overlap the corresponding lead 10. This increases the contact area between the pair of second leads 12 and the pair of third leads 13 in the resin package 100 and the resin member 40. In the light-emitting device 1000A, the protrusions 47 may be omitted. Omitting the protrusions 47 makes it easier to arrange the light-absorbing member within the wire connection area 26.

[0254] This disclosure includes light-emitting devices and display devices described in the following items. [Item 1] A support having a first surface and a second surface located opposite the first surface, A first light-emitting element and a second light-emitting element are located on the first surface side of the support and are arranged in this order in the first direction, A covering member that covers the first light-emitting element and the second light-emitting element, Equipped with, The covering member is In a plan view from the first surface, the base portion overlaps the first light-emitting element and the second light-emitting element, A first lens portion located on the base and overlapping the first light-emitting element in a plan view, A second lens portion is located on the base and overlaps the second light-emitting element in a plan view, A second convex portion is located on the base portion, is lower than the height of each of the first and second lens portions, and has a height of 10 μm or more, It has, A light-emitting device in which part or all of the convex portion is located between the first lens portion and the second lens portion in the plan view. [Item 2] The aforementioned protrusion is, In the plan view, a first region located between the first lens portion and the second lens portion, A second region connected to the first region, the second region not located between the first lens portion and the second lens portion in the plan view, A third region connected to the second region, the third region overlapping the first lens portion in a second direction perpendicular to the first direction, A light-emitting device as described in item 1, having the following characteristics. [Item 3] The third region is in contact with at least a portion of the outer edge of the base in the plan view, as described in item 2. [Item 4] The light-emitting device according to item 2 or 3, wherein in the plan view, a portion of the first region coincides with a straight line connecting the center of the first lens portion and the center of the second lens portion. [Item 5] The light-emitting device according to any one of items 1 to 4, wherein the outer edge of the convex portion has a portion that extends away from the center of the second lens portion in a second direction perpendicular to the first direction as it moves away from the center of the first lens portion in the first direction. [Item 6] The light-emitting device according to any one of items 1 to 5, wherein the dimension of the convex portion in the first direction increases as it moves away from the center of the first lens portion in a second direction perpendicular to the first direction. [Item 7] The light-emitting device according to any one of items 1 to 6, wherein the height of the convex portion increases as it moves away from the center of the first lens portion in a second direction orthogonal to the first direction. [Item 8] The light-emitting device according to any one of items 1 to 7, wherein the water repellency of the surface of the convex portion is higher than the water repellency of the peripheral portion of the surface of the base portion around the convex portion. [Item 9] The convex portion is a fourth region connected to the first region, located on the side opposite to the second region with respect to the first region, and not located between the first lens portion and the second lens portion in the plan view, and a fifth region connected to the fourth region, located on the side opposite to the third region with respect to the first lens portion, The light-emitting device according to item 2, further comprising [Item 10] The covering member is located away from the first convex portion which is the convex portion on the base portion, has a second convex portion lower than the height of the second lens portion and having a height of 10 μm or more, The second convex portion is a sixth region located on the side opposite to the first region with respect to the second lens portion in the plan view, a seventh region connected to the sixth region, and an eighth region connected to the seventh region, the eighth region overlapping the second lens portion in a second direction orthogonal to the first direction, The light-emitting device according to any one of items 2 to 4, having [Item 11] a mounting substrate having a mounting surface, at least one light-emitting device mounted on the mounting surface, the at least one light-emitting device according to any one of items 1 to 10, comprising A display device, in which, during use, with the vertical direction being downward, the first lens portion is located below the second lens portion.

Industrial Applicability

[0255] The light-emitting and display devices of this disclosure can be used, for example, in environments where water adheres to the surface. Even if water adheres to the surface, water is less likely to accumulate on the lens surface. Therefore, it is possible to reduce the change in the light distribution characteristics of the light-emitting device due to water accumulated on the lens surface. [Explanation of Symbols]

[0256] 1: Mounting substrate 1a: Mounting surface 3: Waterproof resin 10: Pair of leads 10a~10c: First to third parts of leads 11~13: Pair of first to third leads 20: Mounting area 21~22: First to second mounting areas 20A: Bottom surface 20B: Inner surface 20C: Bottom surface 20D: Inner surface 20D1: First inner surface 20D2: Second inner surface 20DS: Stepped surface 26: Wire connection area 30: Exposed area 31~33: Wire 40: Resin component 47: Protrusion 50: Light-emitting element 51~53: First to third light-emitting elements 60: Molded resin part 61: Base part 61a: Surface 61b: Side part 64: Extended part 70: Lens part 71~73: First to third lens part 80: Protrusion 80a~80o: Regions 1 to 15 80a1, 80a2: Region 1 80f1, 80f2: Region 6 80k1, 80k2: Region 11 81~83: Regions 1 to 3 81a~81d: Region 1 82a~82c: Region 2 100: Resin package 100a: Main surface 100a: Main surface 100b: Back surface 100c: Outer surface 150: Reflective material 160: Light absorbing material 190: Light absorbing material 900, 1000A~1000F: Light-emitting device 1000u: Boundary 2000: Display device

Claims

1. A support having a first surface and a second surface located opposite the first surface, A first light-emitting element and a second light-emitting element are located on the first surface side of the support and are arranged in this order in the first direction, A covering member that covers the first light-emitting element and the second light-emitting element, Equipped with, The covering member is In a plan view from the first surface, the base portion overlaps the first light-emitting element and the second light-emitting element, A first lens portion is located on the base and overlaps the first light-emitting element in a plan view, A second lens portion is located on the base and overlaps the second light-emitting element in a plan view, A convex portion located on the base, lower than the height of the first lens portion and the second lens portion, and having a height of 10 μm or more, It has, A light-emitting device in which part or all of the convex portion is located between the first lens portion and the second lens portion in the plan view.

2. The aforementioned protrusion is, In the plan view, a first region located between the first lens portion and the second lens portion, A second region connected to the first region, the second region not located between the first lens portion and the second lens portion in the plan view, A third region connected to the second region, the third region overlapping the first lens portion in a second direction perpendicular to the first direction, The light-emitting device according to claim 1, having the following features.

3. The light-emitting device according to claim 2, wherein the third region is in contact with at least a portion of the outer edge of the base in the plan view.

4. The light-emitting device according to claim 2 or 3, wherein in the plan view, a part of the first region coincides with a straight line connecting the center of the first lens portion and the center of the second lens portion.

5. The light-emitting device according to any one of claims 1 to 3, wherein the outer edge of the convex portion has a portion that extends away from the center of the second lens portion in a second direction perpendicular to the first direction as it moves away from the center of the first lens portion in the first direction.

6. The light-emitting device according to any one of claims 1 to 3, wherein the dimension of the convex portion in the first direction increases as it moves away from the center of the first lens portion in a second direction perpendicular to the first direction.

7. The light-emitting device according to any one of claims 1 to 3, wherein the height of the protrusion increases as it moves away from the center of the first lens portion in a second direction perpendicular to the first direction.

8. The light-emitting device according to any one of claims 1 to 3, wherein the water repellency of the surface of the protrusion is higher than that of the peripheral portion of the surface of the base of the protrusion.

9. The aforementioned protrusion is, A fourth region connected to the first region, which is located on the opposite side from the second region with respect to the first region, and which is not located between the first lens portion and the second lens portion in the plan view, A fifth region connected to the fourth region, the fifth region located on the opposite side from the third region with respect to the first lens portion, The light-emitting device according to claim 2, further comprising the above.

10. The covering member has a second protrusion located on the base, away from the first protrusion which is the convex portion, and is lower than the height of the second lens portion and has a height of 10 μm or more. The second protrusion is, In the plan view, a sixth region is located on the opposite side from the first region with respect to the second lens portion, A seventh region connected to the sixth region, An eighth region connected to the seventh region, the eighth region overlapping the second lens portion in a second direction perpendicular to the first direction, A light-emitting device according to claim 2 or 3, having the following features.

11. A mounting board having a mounting surface, At least one light-emitting device mounted on the aforementioned mounting surface, comprising the at least one light-emitting device according to any one of claims 1 to 3, Equipped with, A display device in which, when in use, the first lens portion is positioned below the second lens portion, with the vertical direction being downward.

Images