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, first and second light-emitting elements 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 and second light-emitting elements, wherein the covering member has a base that overlaps the first and second light-emitting elements in a plan view from the first surface side, surrounds the support and has an extended portion extending outward from the base, a first lens portion located on the base and overlapping the first light-emitting element in a plan view, a second lens portion located on the base and overlapping the second light-emitting element in a plan view, and a recess provided in the base, wherein the recess has a first region located between the first and second lens portions in a plan view, and a second region connected to the first region and not located between the first and second lens portions in a plan view.

Description

Technical Field

[0001] The present 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 directivity 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 water. Therefore, there is a need for a light-emitting device in which water is unlikely to accumulate on the surface of the lens.

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 that overlaps the first light-emitting element and the second light-emitting element in a plan view as seen from the first surface side, surrounds the support, and has an extension portion extending outward from the base; a first lens portion located on the base and overlapping the first light-emitting element in a plan view; a second lens portion located on the base and overlapping the second light-emitting element in a plan view; and a recess provided in the base, wherein the recess has a first region located between the first lens portion and the second lens portion in a plan view; and a second region connected to the first region and not 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]FIG. 6C is a side view schematically showing the configuration of the light-emitting device according to Exemplary Embodiment 5 of the present disclosure, as viewed from the +X direction. [Figure 7A] FIG. 7A is a plan view schematically showing the configuration of the 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 the 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 the 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 the light-emitting device according to Exemplary Embodiment 7 of the present disclosure, as viewed from the +Z direction. [Figure 8B] FIG. 8B is a side view schematically showing the configuration of the light-emitting device according to Exemplary Embodiment 7 of the present disclosure, as viewed from the -Y direction. [Figure 8C] FIG. 8C is a side view schematically showing the configuration of the light-emitting device according to Exemplary Embodiment 7 of the present disclosure, as viewed from the +X direction. [Figure 9A] FIG. 9A is a plan view schematically showing the configuration of the light-emitting device according to Embodiment 1, with the base omitted, as viewed from the +Z direction. [Figure 9B] FIG. 9B is a plan view schematically showing the configuration of the resin package in a state where a plurality of light-emitting elements are accommodated, as viewed from the +Z direction. [Figure 9C] FIG. 9C is a cross-sectional view taken along the IXC-IXC line of the resin package shown in FIG. 9B. [Figure 9D] FIG. 9D is a cross-sectional view taken along the IXD-IXD line of the resin package shown in FIG. 9B. [Figure 10A] FIG. 10A is a side view schematically showing the configuration of the light-emitting device 1000A according to Embodiment 1, for explaining the shapes of the resin package and the base, as viewed from the -Y direction. [Figure 10B] FIG. 10B is a side view schematically showing the configuration of the light-emitting device 1000A according to Embodiment 1, for explaining the shapes of the resin package and the base, as viewed from the +X direction. [Modes for carrying out the invention]

[0009] Embodiments of this disclosure will be described below with reference to the drawings as appropriate. However, the light-emitting devices and display devices described below are intended to embody the technical concept of the present invention, and unless otherwise specified, the present invention is not limited to these. Furthermore, the content described in one embodiment is applicable to other embodiments and modifications. In addition, the size and positional relationships of the components shown in the drawings may be exaggerated for clarity of explanation. Also, in some cases, end views showing only the cross-section may be shown as cross-sectional views.

[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. Embodiments 1 to 7 are provided as examples of the embodiments of this disclosure.

[0013] (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.

[0014] 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.

[0015] [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.

[0016] 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.

[0017] 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.

[0018] 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.

[0019] 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.

[0020] 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.

[0021] [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.

[0022] 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.

[0023] 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°.

[0024] The following is an overview of the multiple light-emitting elements 50, the resin package 100, and the molded resin part 60.

[0025] <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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] <Resin package 100> 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."

[0030] 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.

[0031] 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.

[0032] 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.

[0033] <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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] <Recessed 80> In the light-emitting device 1000A according to Embodiment 1, the molded resin portion 60 has a plurality of recesses 80 provided on the base portion 61, as shown in Figures 2A and 2B. The plurality of recesses 80 are located 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 recesses 80 may be parallel to the XY plane or may be inclined with respect to the XY plane. Each recess 80 is provided so as not to contact the main surface 100a and the outer portion 100c of the resin package 100, as shown in Figures 2C and 2D. As will be explained in detail later, the plurality of recesses 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.

[0043] In this specification, a recess 80 means a continuous region having a minimum width of 100 μm or more and a maximum depth of 10 μm or more relative to the periphery of the recess 80 on the surface 61a. This recess 80 is different from a recess of unevenness 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. A contact-type surface roughness measuring instrument, a laser microscope, etc., can be used to measure Ra. For example, a Keyence VK-250 laser microscope may be used.

[0044] The multiple recesses 80 include a first recess 81, a second recess 82, and a third recess 83, arranged in this order in the +Y direction, as shown in Figures 2A and 2B. The second recess 82 is located away from the first recess 81. The third recess 83 is located away from the second recess 82. The first recess 81 is located away from the third recess 83.

[0045] The inner surface of the first recess 81 has two inclined surfaces on the ±Y direction side and a bottom surface located between the two inclined surfaces. The same applies to the inner surface of the second recess 82. The inner surface of the third recess 83 has one inclined surface on the -Y direction side and a bottom surface tangent to this inclined surface. The bottom surface may be parallel to the XY plane or inclined with respect to the XY plane. The inner surfaces of the first recess 81, the second recess 82, and the third recess 83 may have smooth curved surfaces.

[0046] It is not necessary to provide all three recesses: the first recess 81, the second recess 82, and the third recess 83. For example, any one or two of the three recesses 81 to 83 may be provided.

[0047] <First recess 81> As shown in Figure 2B, the first recess 81 has a first region 80a, a second region 80b, a third region 80c, a fourth region 80d, and a fifth region 80e.

[0048] 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 recess 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. In the first embodiment, the first region 80a overlaps 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. The second region 80b is connected to the first region 80a. 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 recess 81 that does not overlap with any of the plurality of 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 in a plan view. The third region 80c is connected to the second region 80b. The third region 80c is further located in the second direction (+X direction) relative to the first lens portion 71 in a plan view. In a plan view, the third region 80c is a part of the first recess 81 that overlaps with at least one of a plurality of imaginary line segments extending in the second direction from at least a part of the first lens portion 71. The fourth region 80d is connected to the first region 80a. The fourth region 80d is further located on the opposite side of the second region 80b relative 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 fifth region 80e is connected to the fourth region 80d. In a plan view, the fifth region 80e is further located on the opposite side of the third region 80c relative to the first lens portion 71, i.e., on the -X direction side.

[0049] In the first recess 81, water adhering to the first region 80a moves by gravity to the third region 80c via the second region 80b, or to the fifth region 80e via the fourth region 80d. As a result, water is less likely to accumulate in the first region 80a.

[0050] The dimensions of the first recess 81 in the Y direction increase as it moves away from the center of the first lens portion 71 in the X direction. Therefore, it is easier to increase the amount of water that can flow through the first recess 81 as it moves away from the center of the first lens portion 71 in the X direction. As a result, water adhering to the first region 80a can easily move to the third region 80c via the second region 80b, or to the fifth region 80e via the fourth region 80d.

[0051] The outer edge of the first recess 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 first region 80a is easily moved downward along the outer edge of the first recess 81 on the -Y direction side due to gravity.

[0052] The outer edge of the first recess 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. This is to ensure that the first recess 81 is provided at a distance from the second recess 82.

[0053] 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.

[0054] Preferably, the depth of the first recess 81 increases as it moves away from the center of the first lens portion 71 in the X direction. In this case, water adhering to the inner surface of the first recess 81 tends to move toward the outer edge of the surface 61a of the base portion 61.

[0055] If the third region 80c of the inner surface of the first recess 81, which is in contact with the outer edge of the surface 61a of the base 61, has the depth described above, then water adhering to the third region 80c can be effectively discharged to the outside of the surface 61a of the base 61. The same applies to the fifth region 80e of the inner surface of the first recess 81, which is in contact with the outer edge of the surface 61a of the base 61.

[0056] It is preferable that the hydrophilicity of the inner surface of the first recess 81 is higher than that of the surface of the first lens portion 71. In this case, the inner surface of the first recess 81 is more easily wetted by water than the surface of the first lens portion 71.

[0057] The higher the hydrophilicity of a surface, the smaller the contact angle of water adhering to the surface, making the surface less 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. In this context, hydrophilicity means that the contact angle is less than 90°.

[0058] One example of a method for adjusting the hydrophilicity of a surface is to adjust the surface roughness of a hydrophilic surface. Roughening a hydrophilic surface tends to improve its hydrophilicity. For example, if surfaces A and B are part of the same hydrophilic surface, the surface roughness of surface A may be made greater than that of surface B in order to make surface A more hydrophilic than surface B. In this case, only surface A may be roughened, or the degree of roughening may be different when roughening surfaces A and B. Roughening can be performed by known methods such as sandblasting. Alternatively, a part of the surface of a covering member can be roughened by molding the covering member using a mold in which a part of the inner surface has been roughened.

[0059] Another example of a method for adjusting the hydrophilicity of a surface is to apply a hydrophilic coating to the surface. To make surface A more hydrophilic than surface B, a hydrophilic coating may be applied to surface A, while surface B does not need such a coating. Alternatively, a coating with relatively high hydrophilicity may be applied to surface A, and a coating with relatively low hydrophilicity may be applied to surface B.

[0060] In order to satisfy the above-mentioned relationship of hydrophilicity for the inner surface of the first recess 81 and the surface of the first lens portion 71, if the surface of the molded resin portion 60 is hydrophilic, the surface roughness of the inner surface of the first recess 81 may be greater than the surface roughness of the surface of the first lens portion 71.

[0061] Alternatively, a hydrophilic coating may be applied to the inner surface of the first recess 81, while such a coating may not be applied to the surface of the first lens portion 71. Or, a coating with relatively high hydrophilicity may be applied to the inner surface of the first recess 81, while a coating with relatively low hydrophilicity may be applied to the surface of the first lens portion 71. However, for long-term use, adjusting the surface roughness is more advantageous in terms of durability than applying a coating that may peel off due to aging.

[0062] The hydrophilicity of the portion of the base 61's side surface that is in contact with the third region 80c may be higher than that of the third region 80c. In this case, the portion of the base 61's side surface that is in contact with the third region 80c is more easily wetted by water than the third region 80c itself.

[0063] Similarly, the hydrophilicity of the portion of the base 61's side surface that is in contact with the fifth region 80e may be higher than that of the fifth region 80e. In this case, the portion of the base 61's side surface that is in contact with the fifth region 80e is more easily wetted by water than the fifth region 80e itself.

[0064] The hydrophilicity of at least a portion of the side surface of the base 61 may be higher than that of the surface of the first lens portion 71. In this case, at least a portion of the side surface of the base 61 is more easily wetted by water than the surface of the first lens portion 71.

[0065] Due to the hydrophilic relationship described above, water is less likely to remain on the surface of the first lens portion 71 and the inner surface of the first recess 81 compared to the side surface of the base portion 61. Even if water remains on the inner surface of the first recess 81, the high hydrophilicity of the inner surface of the first recess 81 causes the water to spread and dry easily.

[0066] <Second recess 82> As shown in Figure 2B, the second recess 82 has a sixth region 80f, a seventh region 80g, an eighth region 80h, a ninth region 80i, and a tenth region 80j.

[0067] 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 is further located on the opposite side from the first region 80a with respect to the second lens portion 72. In the first embodiment, 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. The seventh region 80g connects to the sixth region 80f. The seventh region 80g is not located between the second lens portion 72 and the third lens portion 73 in a plan view. The eighth region 80h connects to the seventh region 80g. The eighth region 80h is further located on the second direction (+X direction) side with respect to the second lens portion 72 in a plan view. The eighth region 80h does not connect to the second region 80b and the third region 80c. The ninth region 80i connects to the sixth region 80f. The ninth region 80i is located on the opposite side of the seventh region 80g from the sixth region 80f in a plan view. The ninth region 80i is not located between the second lens section 72 and the third lens section 73 in a plan view. The tenth region 80j is connected to the ninth region 80i. The tenth region 80j is located on the opposite side of the eighth region 80h from the second lens section 72 in a plan view, i.e., on the -X direction side. The tenth region 80j is not connected to the fourth region 80d and the fifth region 80e.

[0068] In the second recess 82, water adhering to the sixth region 80f moves by gravity to the eighth region 80h via the seventh region 80g, or to the tenth region 80j via the ninth region 80i. As a result, water is less likely to accumulate in the sixth region 80f.

[0069] The dimensions of the second recess 82 in the Y direction increase as it moves away from the center of the second lens portion 72 in the X direction. Therefore, it is easier to increase the amount of water that can flow through the second recess 82 as it moves away from the center of the second lens portion 72 in the X direction. As a result, water adhering to the sixth region 80f is more likely to move to the eighth region 80h via the seventh region 80g, or to the tenth region 80j via the ninth region 80i.

[0070] The outer edge of the second recess 82 on the -Y direction side 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 sixth region 80f is easily moved downward by gravity along the outer edge of the second recess 82 on the -Y direction side.

[0071] The outer edge of the second recess 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. This is to provide the second recess 82 at a distance from the third recess 83.

[0072] 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.

[0073] Preferably, the depth of the second recess 82 increases as it moves away from the center of the second lens portion 72 in the X direction. In this case, water adhering to the inner surface of the second recess 82 tends to move toward the outer edge of the surface 61a of the base portion 61.

[0074] If the eighth region 80h of the inner surface of the second recess 82, which is in contact with the outer edge of the surface 61a of the base 61, has the depth described above, then water adhering to the eighth region 80h can be effectively discharged to the outside of the surface 61a of the base 61. The same applies to the tenth region 80j of the inner surface of the first recess 81, which is in contact with the outer edge of the surface 61a of the base 61.

[0075] It is preferable that the hydrophilicity of the inner surface of the second recess 82 is higher than that of the surface of the second lens portion 72. In this case, the inner surface of the second recess 82 is more easily wetted by water than the surface of the second lens portion 72.

[0076] The hydrophilicity of the portion of the base 61's side surface that is in contact with the eighth region 80h may be higher than that of the eighth region 80h. In this case, the portion of the base 61's side surface that is in contact with the eighth region 80h is more easily wetted by water than the eighth region 80h.

[0077] Similarly, the hydrophilicity of the portion of the base 61's side surface that is in contact with the 10th region 80j may be higher than that of the 10th region 80j. In this case, the portion of the base 61's side surface that is in contact with the 10th region 80j is more easily wetted by water than the 10th region 80j.

[0078] The hydrophilicity of at least a portion of the side surface of the base 61 may be higher than that of the surface of the second lens portion 72. In this case, at least a portion of the side surface of the base 61 is more easily wetted by water than the surface of the second lens portion 72.

[0079] Due to the hydrophilic relationship described above, water is less likely to remain on the surface of the second lens portion 72 and the inner surface of the second recess 82 compared to the side surface of the base portion 61. Even if water remains on the inner surface of the second recess 82, the high hydrophilicity of the inner surface of the second recess 82 causes the water to spread and dry easily.

[0080] <Third recess 83> As shown in Figure 2B, the third recess 83 has an eleventh region 80k, a twelfth region 80l, a thirteenth region 80m, a fourteenth region 80n, and a fifteenth region 80o.

[0081] The 11th region 80k is located on the opposite side of the 6th region 80f with respect to the 3rd lens section 73. The 12th region 80l connects to the 11th region 80k in a plan view. The 13th region 80m connects to the 12th region 80l. The 13th region 80m is located in the +X direction with respect to the 3rd lens section 73 in a plan view. The 13th region 80m does not connect to the 7th region 80g and the 8th region 80h. The 14th region 80n connects to the 11th region 80k. The 14th region 80n is located on the opposite side of the 12th region 80l with respect to the 11th region 80k in a plan view. The 15th region 80o connects to the 14th region 80n. The 15th region 80o is further located on the opposite side of the 13th region 80m with respect to the 3rd lens section 73 in a plan view, i.e., on the -X direction side. Region 15 80o is not connected to region 9 80i and region 10 80j.

[0082] In the third recess 83, water adhering to the 11th region 80k moves by gravity to the 13th region 80m via the 12th region 80l, or to the 15th region 80o via the 14th region 80n. As a result, water is less likely to accumulate in the 11th region 80k.

[0083] The dimensions of the third recess 83 in the Y direction increase as it moves away from the center of the third lens portion 73 in the X direction. Therefore, it is easier to increase the amount of water that can flow within the third recess 83 as it moves away from the center of the third lens portion 73 in the X direction. As a result, water adhering to the 11th region 80k is easily moved to the 13th region 80m via the 12th region 80l, or to the 15th region 80o via the 14th region 80n.

[0084] The outer edge of the third recess 83 on the -Y direction side has a portion that extends away from the center of the third lens portion 73 in the X direction as it moves 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 11th region 80k is easily moved downward by gravity along the outer edge of the third recess 83 on the -Y direction side. The outer edge of the third recess 83 on the +Y direction side coincides with the outer edge located on the +Y direction side of the surface 61a of the base portion 61.

[0085] 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.

[0086] Preferably, the depth of the third recess 83 increases as it moves away from the center of the third lens portion 73 in the X direction. In this case, water adhering to the inner surface of the third recess 83 tends to move toward the outer edge of the surface 61a of the base portion 61.

[0087] If the 13th region 80m of the inner surface of the 3rd recess 83, which is in contact with the outer edge of the surface 61a of the base 61, has the depth described above, then water adhering to the 13th region 80m can be effectively discharged to the outside of the surface 61a of the base 61. The same applies to the 15th region 80o of the inner surface of the 1st recess 81, which is in contact with the outer edge of the surface 61a of the base 61.

[0088] It is preferable that the hydrophilicity of the inner surface of the third recess 83 is higher than that of the surface of the third lens portion 73. In this case, the inner surface of the third recess 83 is more easily wetted by water than the surface of the third lens portion 73.

[0089] The hydrophilicity of the portion of the base 61's side surface that is in contact with the 13th region 80m may be higher than that of the 13th region 80m. In this case, the portion of the base 61's side surface that is in contact with the 13th region 80m is more easily wetted by water than the 13th region 80m.

[0090] Similarly, the hydrophilicity of the portion of the base 61's side surface that is in contact with the 15th region 80o may be higher than the hydrophilicity of the 15th region 80o. In this case, the portion of the base 61's side surface that is in contact with the 15th region 80o is more easily wetted by water than the 15th region 80o.

[0091] The hydrophilicity of at least a portion of the side surface of the base 61 may be higher than that of the surface of the third lens portion 73. In this case, at least a portion of the side surface of the base 61 is more easily wetted by water than the surface of the third lens portion 73.

[0092] Due to the hydrophilic relationship described above, water is less likely to remain on the surface of the third lens portion 73 and the inner surface of the third recess 83 compared to the side surface of the base portion 61. Even if water remains on the inner surface of the third recess 83, the high hydrophilicity of the inner surface of the third recess 83 causes the water to spread and dry easily.

[0093] The third recess 83 does not drain water between the multiple lens portions 70, so it is not necessarily required to be provided. On the other hand, providing the third recess 83 reduces the movement of water adhering to the third recess 83 to the second recess 82. As a result, water is less likely to adhere to the second recess 82.

[0094] <Example of modification> In Embodiment 1, each recess 80 is symmetrical with respect to a reference plane parallel to the YZ plane, but the invention is not limited to this example. Each recess 80 may be asymmetrical with respect to this reference plane. For example, the first recess 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 recess 82 may not have a seventh region 80g and an eighth region 80h, or a ninth region 80i and a tenth region 80j. The third recess 83 may not have a twelfth region 80l and a thirteenth region 80m, or a fourteenth region 80n and a fifteenth region 80o.

[0095] In Embodiment 1, the first recess 81 has a first region 80a, but the invention is not limited to this example. The first recess 81 does not have to have a first region 80a. Even in that case, in the first recess 81, water adhering to the second region 80b moves to the third region 80c, and water adhering to the fourth region 80d moves to the fifth region 80e. As a result, it is possible to reduce the movement of water adhering to the second region 80b or the fourth region 80d between the first lens portion 71 and the second lens portion 72.

[0096] Similarly, the second recess 82 does not have to have a sixth region 80f. Even in that case, it is possible to reduce the movement of water adhering to the seventh region 80g or the fourth region 80d between the second lens portion 72 and the third lens portion 73.

[0097] Furthermore, the third recess 83 does not necessarily have to have the 11th region 80k. Even in that case, it is possible to reduce the movement of water adhering to the 12th region 80l, the 13th region 80m, the 14th region 80n, or the 15th region 80o to the second recess 82.

[0098] In Embodiment 1, 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, but is not limited to this example. The first region 80a does not have to coincide 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. The first region 80a may have, for example, two regions located on opposite sides of this straight line. Alternatively, the first region 80a may be, for example, a region located on only one side of this straight line.

[0099] In Embodiment 1, the sixth region 80f coincides with a straight line connecting the center of the second lens portion 72 and the center of the third lens portion 73 in a plan view, but is not limited to this example. The sixth region 80f does not have to coincide with a straight line connecting the center of the second lens portion 72 and the center of the third lens portion 73 in a plan view. The sixth region 80f may have, for example, two regions located on opposite sides of this straight line. Alternatively, the sixth region 80f may have, for example, a region located on only one side of this straight line.

[0100] In Embodiment 1, the width of each recess 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 recess 80 may be constant, or it may become narrower as it approaches the outer edge of the surface 61a of the base 61.

[0101] In Embodiment 1, the inner surface of each recess 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 inner surfaces of some or all of the recesses 80 do not need to be in contact with the outer edge of the surface 61a of the base 61.

[0102] In Embodiment 1, the outer edge of each recess 80 is curved, but the example is not limited to this. The outer edge of each recess 80 may be formed by combining multiple straight lines, as shown below.

[0103] Regarding the two outer edges of the first recess 81 on the ±Y side, the two outer edges of the first region 80a on the ±Y side may be substantially parallel to the X direction. The second region 80b and the third region 80c are considered as one region, and the two outer edges of this region on the ±Y side may be substantially parallel to each other and inclined linearly with respect to the X direction. Similarly, the fourth region 80d and the fifth region 80e are considered as one region, and the two outer edges of this region on the ±Y side may be substantially parallel to each other and inclined linearly with respect to the X direction.

[0104] The two outer edges on the ±Y direction sides of the second recess 82 may have the same shape as the two outer edges on the ±Y direction sides of the first recess 81. For the two outer edges on the ±Y direction sides of the third recess 83, the 11th region 80k may not be provided, and the 12th region 80l and the 13th region 80m may be treated as a single region, with the two outer edges on the ±Y direction sides of this region being substantially parallel to each other and inclined linearly with respect to the X direction. Similarly, the 14th region 80n and the 15th region 80o may be treated as a single region, with the two outer edges on the ±Y direction sides of this region being substantially parallel to each other and inclined linearly with respect to the X direction.

[0105] In the above example in which multiple straight lines are combined to form the outer edge of each recess 80, one of the multiple recesses 80 may partially overlap or not overlap at all with the other recesses 80 when viewed from the X direction. The inclination angle of the portion of the two outer edges on the ±Y direction side of each recess 80 that is inclined with respect to the X direction may be, for example, 10° or more and 50° or less.

[0106] 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.

[0107] 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.

[0108] In contrast, in the light-emitting device 1000A according to Embodiment 1, a plurality of recesses 80 are provided on the surface 61a of the base 61. The structure of the recesses 80 themselves does not change significantly due to aging, which is advantageous for long-term use.

[0109] (Embodiment 2) Hereinafter, 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 number and shape of the recesses 80.

[0110] As shown in Figure 3A, the multiple recesses 80 are positioned apart from each other on the surface 61a of the base 61. Each recess 80 is provided so as not to contact the main surface 100a and the outer portion 100c of the resin package 100, as shown in Figures 3B and 3C.

[0111] The multiple recesses 80 include a first recess 81 and a second recess 82, which are arranged in this order in the +Y direction, as shown in Figure 3A. The second recess 82 is located away from the first recess 81.

[0112] The inner surfaces of the first recess 81 and the second recess 82 have smooth curved surfaces. The inner surface of the first recess 81 may have two inclined surfaces and a bottom surface located between the two inclined surfaces. The same applies to the inner surface of the second recess 82.

[0113] It is not necessary to provide both the first recess 81 and the second recess 82. For example, only one of the first recess 81 or the second recess 82 may be provided.

[0114] <First recess 81> As shown in Figure 3A, the first recess 81 has a first region 80a, a second region 80b, and a fourth region 80d.

[0115] The first region 80a is located between the first lens portion 71 and the second lens portion 72 in a plan view. In Embodiment 2, the first region 80a 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. The second region 80b is connected to the first region 80a. The second region 80b is not located between the first lens portion 71 and the second lens portion 72 in a plan view. The fourth region 80d is connected to the first region 80a. The fourth region 80d is further located on the opposite side of the second region 80b from 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 in a plan view.

[0116] The dimensions of the first recess 81 in the Y direction increase gradually as you move away from the centers of the first lens portion 71 and / or the second lens portion 72 in the X direction. Therefore, it is easier to increase the amount of water that can flow through the first recess 81 as you move away from the center of the first lens portion 71 in the X direction. As a result, water adhering to the first region 80a is more likely to move to the second region 80b or the fourth region 80d.

[0117] The second region 80b is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the second region 80b is easily discharged to the outside of the surface 61a of the base 61. Similarly, the fourth region 80d is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the fourth region 80d is easily discharged to the outside of the surface 61a of the base 61.

[0118] The depth of the first recess 81 may increase as it moves away from the center of the first lens portion 71 and / or the second lens portion 72 in the X direction. In this case, water adhering to the inner surface of the first recess 81 is more likely to move toward the outer edge of the surface 61a of the base portion 61.

[0119] If the second region 80b of the inner surface of the first recess 81, which is in contact with the outer edge of the surface 61a of the base 61, has the depth described above, then water adhering to the second region 80b can be effectively discharged to the outside of the surface 61a of the base 61. The same applies to the fourth region 80d of the inner surface of the first recess 81, which is in contact with the outer edge of the surface 61a of the base 61.

[0120] The hydrophilicity of the inner surface of the first recess 81 may be higher than the hydrophilicity of the surface of the first lens portion 71 and / or the second lens portion 72. The hydrophilicity of the portion of the side surface of the base portion 61 that is in contact with the second region 80b may be higher than the hydrophilicity of the second region 80b. The hydrophilicity of the portion of the side surface of the base portion 61 that is in contact with the fourth region 80d may be higher than the hydrophilicity of the fourth region 80d. The hydrophilicity of at least a portion of the side surface of the base portion 61 may be higher than the hydrophilicity of the surface of the first lens portion 71 and / or the second lens portion 72.

[0121] Due to the hydrophilic relationship described above, water is less likely to remain on the surface of the first lens portion 71 and / or the second lens portion 72, as well as on the inner surface of the first recess 81, compared to the side surface of the base portion 61. Even if water remains on the inner surface of the first recess 81, the high hydrophilicity of the inner surface of the first recess 81 causes the water to spread and dry easily.

[0122] <Second recess 82> As shown in Figure 3A, the second recess 82 has a sixth region 80f, a seventh region 80g, and a ninth region 80i.

[0123] 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 is further located on the opposite side of the second lens portion 72 from the first region 80a. In Embodiment 2, 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. The seventh region 80g connects to the sixth region 80f. The seventh region 80g is not located between the second lens portion 72 and the third lens portion 73 in a plan view. The seventh region 80g is not connected to the second region 80b. The ninth region 80i connects to the sixth region 80f. The ninth region 80i is further located on the opposite side of the sixth region 80f from the seventh region 80g in a plan view. The ninth region 80i is not located between the second lens portion 72 and the third lens portion 73 in a plan view. Region 9, 80i, is not connected to region 4, 80d.

[0124] The dimensions of the second recess 82 in the Y direction increase gradually as it moves away from the center of the second lens portion 72 and / or the third lens portion 73 in the X direction. Therefore, it is easier to increase the amount of water that can flow within the second recess 82 as it moves away from the center of the second lens portion 72 and / or the third lens portion 73 in the X direction. As a result, water adhering to the sixth region 80f is more likely to move to the seventh region 80g or the ninth region 80i.

[0125] The seventh region 80g is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the seventh region 80g is easily discharged to the outside of the surface 61a of the base 61. Similarly, the ninth region 80i is in contact with the outer edge of the surface 61a of the base 61. Therefore, water that moves to the ninth region 80i is easily discharged to the outside of the surface 61a of the base 61.

[0126] The depth of the second recess 82 may increase as it moves away from the center of the second lens portion 72 and / or the third lens portion 73 in the X direction. In this case, water adhering to the inner surface of the second recess 82 is more likely to move toward the outer edge of the surface 61a of the base portion 61.

[0127] If the seventh region 80g of the inner surface of the first recess 81, which is in contact with the outer edge of the surface 61a of the base 61, has the depth described above, then water adhering to the seventh region 80g can be effectively discharged to the outside of the surface 61a of the base 61. The same applies to the ninth region 80i of the inner surface of the first recess 81, which is in contact with the outer edge of the surface 61a of the base 61.

[0128] The hydrophilicity of the inner surface of the second recess 82 may be higher than the hydrophilicity of the surface of the second lens portion 72 and / or the third lens portion 73. The hydrophilicity of the portion of the side surface of the base portion 61 that is in contact with the seventh region 80g may be higher than the hydrophilicity of the seventh region 80g. The hydrophilicity of the portion of the side surface of the base portion 61 that is in contact with the ninth region 80i may be higher than the hydrophilicity of the ninth region 80i. The hydrophilicity of at least a portion of the side surface of the base portion 61 may be higher than the hydrophilicity of the surface of the second lens portion 72 and / or the third lens portion 73.

[0129] Due to the hydrophilic relationship described above, water is less likely to remain on the surface of the second lens portion 72 and / or the third lens portion 73, as well as on the inner surface of the second recess 82, compared to the side surface of the base portion 61. Even if water remains on the inner surface of the second recess 82, the high hydrophilicity of the inner surface of the second recess 82 causes the water to spread and dry easily.

[0130] <Example of modification> In Embodiment 2, each recess 80 is symmetrical with respect to a reference plane parallel to the YZ plane, but the embodiment is not limited to this example. Each recess 80 may be asymmetrical with respect to this reference plane. For example, the first recess 81 does not have to have a second region 80b or a fourth region 80d. The second recess 82 does not have to have a seventh region 80g or a ninth region 80i.

[0131] In Embodiment 2, the first recess 81 has a first region 80a, but the invention is not limited to this example. The first recess 81 does not have to have a first region 80a. Even in that case, water adhering to the second region 80b or the fourth region 80d in the first recess 81 is discharged to the outside of the surface 61a of the base 61. As a result, it is possible to reduce the movement of water adhering to the second region 80b or the fourth region 80d between the first lens portion 71 and the second lens portion 72.

[0132] Similarly, the second recess 82 does not necessarily have a sixth region 80f. Even without the sixth region 80f in the second recess 82, it is possible to reduce the movement of water adhering to the seventh region 80g or the ninth region 80i between the second lens portion 72 and the third lens portion 73.

[0133] In Embodiment 2, 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, but is not limited to this example. The first region 80a does not have to coincide 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. The first region 80a may have, for example, two regions located on opposite sides of this straight line. Alternatively, the first region 80a may be, for example, a region located on only one side of this straight line.

[0134] In Embodiment 2, the sixth region 80f coincides with a straight line connecting the center of the second lens portion 72 and the center of the third lens portion 73 in a plan view, but is not limited to this example. The sixth region 80f does not have to coincide with a straight line connecting the center of the second lens portion 72 and the center of the third lens portion 73 in a plan view. The sixth region 80f may have, for example, two regions located on opposite sides of this straight line. Alternatively, the sixth region 80f may have, for example, a region located on only one side of this straight line.

[0135] In Embodiment 2, the width of each recess 80 gradually widens as it approaches the outer edge of the surface 61a of the base 61, but the embodiment is not limited to this example. The width of each recess 80 may widen smoothly as it approaches the outer edge of the surface 61a of the base 61. Alternatively, the width of each recess 80 may be constant, or it may narrow gradually as it approaches the outer edge of the surface 61a of the base 61.

[0136] In Embodiment 2, the inner surface of each recess 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 inner surfaces of some or all of the recesses 80 do not need to be in contact with the outer edge of the surface 61a of the base 61.

[0137] 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.

[0138] (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.

[0139] In the light-emitting device 1000C shown in Figures 4A to 4C, a grid-shaped recess 80 is provided on the surface 61a of the base 61. As shown in Figures 4B and 4C, the recess 80 is provided so as not to come into contact with the main surface 100a and the outer part 100c of the resin package 100.

[0140] The recess 80 includes two first grooves 84a extending along the Y direction and two second grooves 84b extending along the X direction, as shown in Figure 4A. In plan view, the two first grooves 84a are located on the +X and -X sides with respect to each lens portion 70. In plan view, a portion of one of the two second grooves 84b is located between the first lens portion 71 and the second lens portion 72 in plan view, and a portion of the other is located between the second lens portion 72 and the third lens portion 73 in plan view. Each second groove 84b is connected to both of the two first grooves 84a. Each second groove 84b also intersects with both of the two first grooves 84a. In plan view, the second lens portion 72 is surrounded by the two first grooves 84a and the two second grooves 84b.

[0141] The widths of the first groove 84a and the second groove 84b may be, for example, 100 μm or more and 700 μm or less. The depths of the first groove 84a and the second groove 84b may be, for example, 10 μm or more and 100 μm or less.

[0142] As shown in Figure 4A, the recess 80 has a first region 80a, a second region 80b, a third region 80c, a fourth region 80d, and a fifth region 80e. The arrangement of these regions is as explained with reference to Figure 2B.

[0143] The recess 80 further includes a sixth region 80f, a seventh region 80g, an eighth region 80h, a ninth region 80i, and a tenth region 80j. The arrangement of these regions is as described with reference to Figure 2B. However, unlike the example shown in Figure 2B, the eighth region 80h is further connected to the second region 80b, and the tenth region 80j is further connected to the fourth region 80d.

[0144] The recess 80 further has a 13th region 80m and a 15th region 80o. The 13th region 80m is located on the +X side with respect to the third lens portion 73. The 13th region 80m is further connected to the 7th region 80g. The 15th region 80o is located on the opposite side from the 13th region 80m with respect to the third lens portion 73, i.e., on the -X side. The 15th region 80o is further connected to the 9th region i.

[0145] It is not necessary to provide all two first grooves 84a and two second grooves 84b. At least one of these four grooves may be provided.

[0146] Water adhering to the surface 61a of the base 61, excluding the recess 80, moves to one of the two first grooves 84a and the two second grooves 84b and is discharged to the outside of the surface 61a of the base 61.

[0147] The depth of the second groove 84b may increase as it moves away from the center of each lens 70 in the X direction. In this case, water adhering to the inner surface of the second groove 84b is likely to move toward the outer edge of the surface 61a of the base 61 on the ±X direction side.

[0148] If the portion of the inner surface of the second groove 84b that contacts the outer edge of the surface 61a of the base 61 has the depth described above, water adhering to this portion can be effectively discharged to the outside of the surface 61a of the base 61.

[0149] The hydrophilicity of the inner surface of the recess 80 may be higher than the hydrophilicity of the surface of each lens portion 70. The hydrophilicity of the portion of the side surface of the base portion 61 that is in contact with the inner surface of each recess 80 may be higher than the hydrophilicity of the inner surface of each recess 80. The hydrophilicity of at least a portion of the side surface of the base portion 61 may be higher than the hydrophilicity of the surface of each lens portion 70.

[0150] Due to the hydrophilic relationship described above, water is less likely to remain on the surface of each lens portion 70 and the inner surface of the recess 80 compared to the side surface of the base portion 61. Even if water remains on the inner surface of the recess 80, the high hydrophilicity of the inner surface of the recess 80 causes the water to spread and dry easily.

[0151] <Example of modification> In Embodiment 3, of the two first grooves 84a, the first groove 84a on the -X direction side is separated from the outer edge of the surface 61a of the base 61 on the -X direction side, but is not limited to this example. The first groove 84a on the -X direction side may be in contact with the outer edge of the surface 61a of the base 61 on the -X direction side. Similarly, in Embodiment 3, of the two first grooves 84a, the first groove 84a on the +X direction side is separated from the outer edge of the surface 61a of the base 61 on the +X direction side, but is not limited to this example. The first groove 84a on the +X direction side may be in contact with the outer edge of the surface 61a of the base 61 on the +X direction side.

[0152] 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.

[0153] (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 two points.

[0154] The first point is that each second groove 84b does not extend outward beyond the two first grooves 84a, as shown in Figure 5A. The second point is that the recess 80 further comprises a plurality of third grooves 84c connected to each first groove 84a. The plurality of third grooves 84c are located on the opposite side of each lens portion 70 with respect to each first groove 84a. The depth of each third groove 84c is greater than the depth of each first groove 84a. Each third groove 84c is provided so as not to contact the outer portion 100c of the resin package 100, as shown in Figure 5C.

[0155] The width of the third groove 84c may be, for example, 100 μm or more and 700 μm or less. The depth of the third groove 84c may be, for example, 10 μm or more and 100 μm or less.

[0156] It is not necessary to provide all of the multiple third grooves 84c. For example, of the two first grooves 84a, one or more third grooves 84c may be provided on the side opposite to each lens portion 70 with respect to one of them, but it is not necessary to provide a third groove 84c on the side opposite to each lens portion 70 with respect to the other groove.

[0157] In the X direction, the depth of the third groove 84c, which is farther from the center of the first lens portion 71, is greater than the depth of the first groove 84a, which is closer to the center of the first lens portion 71 in the X direction. Therefore, it is easier to increase the amount of water that can flow through the third groove 84c, which is farther from the center of the first lens portion 71. As a result, water adhering to the first region 80a can easily move through the first groove 84a to the third groove 84c.

[0158] The inner surface of the third groove 84c is in contact with the outer edge of the surface 61a of the base 61. Therefore, water adhering to the inner surface of the third groove 84c is easily discharged to the outside of the surface 61a of the base 61.

[0159] The hydrophilicity of the portion of the base 61's side surface that is in contact with the inner surface of the third groove 84c may be higher than that of the inner surface of the third groove 84c. Therefore, water is less likely to accumulate in the third groove 84c compared to the side surface of the base 61.

[0160] 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.

[0161] (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.

[0162] In the light-emitting device 1000E shown in Figures 6A to 6C, one recess 80 is provided on the surface 61a of the base 61. The recess 80 has a continuous region on the surface 61a of the base 61, excluding the portion located around each lens portion 70. As shown in Figures 6B and 6C, the recess 80 is provided so as not to contact the main surface 100a and the outer portion 100c of the resin package 100.

[0163] As shown in Figure 6A, the recess 80 has a first region 80a, a second region 80b, a third region 80c, a fourth region 80d, and a fifth region 80e. The recess 80 further has a sixth region 80f, a seventh region 80g, an eighth region 80h, a ninth region 80i, and a tenth region 80j. The recess 80 further has a thirteenth region 80m and a fifteenth region 80o. The arrangement of these regions is as described with reference to Figure 4A.

[0164] On the surface 61a of the base 61, a stepped surface is created by the recess 80 in the portion located around each lens portion 70. Due to gravity, water adhering to the portion located around each lens portion 70 moves to the recess 80 via the stepped surface. As a result, water is less likely to accumulate around each lens portion 70.

[0165] The depth of the recess 80 may increase as it moves away from the center of each lens portion 70 in the X direction. In this case, water adhering to the inner surface of the recess 80 is likely to move toward the outer edge of the surface 61a of the base portion 61 on the ±X direction side.

[0166] If the portion of the inner surface of the recess 80 that contacts the outer edge of the surface 61a of the base 61 on the ±X direction has the depth described above, then water adhering to this portion can be effectively discharged to the outside of the surface 61a of the base 61.

[0167] The hydrophilicity of the inner surface of the recess 80 may be higher than that of the surface of each lens portion 70. Since the inner surface of the recess 80 extends over a wide area, if the hydrophilicity of the inner surface of the recess 80 is high, water can be effectively moved to the inner surface of the recess 80. The hydrophilicity of the portion of the side surface of the base portion 61 that is in contact with the inner surface of the recess 80 may be higher than that of the inner surface of the recess 80. The hydrophilicity of at least a portion of the side surface of the base portion 61 may be higher than that of the surface of each lens portion 70.

[0168] Due to the hydrophilic relationship described above, water is less likely to remain on the surface of each lens portion 70 and the inner surface of the recess 80 compared to the side surface of the base portion 61. Even if water remains on the inner surface of the recess 80, the high hydrophilicity of the inner surface of the recess 80 causes the water to spread and dry easily.

[0169] 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.

[0170] (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.

[0171] In the light-emitting device 1000F shown in Figures 7A to 7C, multiple protrusions 90 are provided on the surface 61a of the base 61 in addition to multiple recesses 80. The multiple protrusions 90 are located apart from each other.

[0172] <Multiple recesses 80> The multiple recesses 80 include a first recess 81 and a second recess 82 arranged in this order in the +Y direction, as shown in Figure 7A. A portion of the first recess 81 is located between the first lens portion 71 and the second lens portion 72 in a plan view. A portion of the second recess 82 is located between the second lens portion 72 and the third lens portion 73 in a plan view. The second lens portion 72 is located between the first recess 81 and the second recess 82 in a plan view. The first recess 81 and the second recess 82 are, in general terms, grooves extending along the X direction.

[0173] The first recess 81 has a first region 80a, a second region 80b, and a fourth region 80d. The second recess 82 has a sixth region 80f, a seventh region 80g, and a ninth region 80i. The arrangement of these regions is as described with reference to Figure 3A.

[0174] It is not necessary to provide both the first recess 81 and the second recess 82. For example, only one of the first recess 81 or the second recess 82 may be provided.

[0175] Of the surface 61a of the base portion 61, water adhering to the area between the first lens portion 71 and the second lens portion 72, near the second lens portion 72, is moved by gravity to the first recess 81 and discharged to the outside of the surface 61a along the first recess 81.

[0176] The first recess 81 has a central portion extending along the X direction and two portions located on either side of the central portion. The dimensions of the two portions in the Y direction increase as they move away from the centers of the first lens portion 71 and / or the second lens portion 72 in the X direction. Therefore, it is easier to increase the amount of water that can flow within the first recess 81 as you move away from the centers of the first lens portion 71 and / or the second lens portion 72 in the X direction. As a result, water adhering to the first region 80a is more likely to move to the second region 80b.

[0177] Of the surface 61a of the base portion 61, water adhering to the area between the second lens portion 72 and the third lens portion 73, and near the third lens portion 73, moves to the second recess 82 by gravity and is discharged to the outside of the surface 61a along the second recess 82.

[0178] The second recess 82 has a central portion extending along the X direction and two portions located on either side of the central portion. The dimensions of the two portions in the Y direction increase as they move away from the center of the second lens portion 72 and / or the third lens portion 73 in the X direction. Therefore, the amount of water that can flow through the second recess 82 increases as it moves away from the center of the second lens portion 72 and / or the third lens portion 73 in the X direction. As a result, water adhering to the sixth region 80f is more likely to move to the seventh region 80g and / or the ninth region 80i.

[0179] The width of the central portion of each recess 80 may be, for example, 100 μm or more and 700 μm or less. The depth of the central portion of the first recess 81 and the second recess 82 may be, for example, 10 μm or more and 100 μm or less. The width of the two portions located on both sides of each recess 80 is smaller than the minimum dimension in the Y direction between the lens portion 70. The depth of the two portions located on both sides of each recess 80 may be the same as the depth of the central portion, or it may be greater than the depth of the central portion.

[0180] The depth of each recess 80 may increase as it moves away from the center of the lens portion 70 located near each recess 80 in the X direction. For example, the depth of the first recess 81 may increase as it moves away from the center of the first lens portion 71 in the X direction. Similarly, the depth of the second recess 82 may increase as it moves away from the center of the second lens portion 72 in the X direction. In this case, water adhering to the inner surface of each recess 80 is likely to move toward the outer edge of the surface 61a of the base portion 61 on the ±X direction side.

[0181] If the portion of the inner surface of each recess 80 that is in contact with the outer edge of the surface 61a of the base 61 on the ±X direction has the depth described above, then water adhering to this portion can be effectively discharged to the outside of the surface 61a of the base 61.

[0182] The hydrophilicity of the inner surface of each recess 80 may be higher than the hydrophilicity of the surface of the lens portion 70 located near each recess 80. For example, the hydrophilicity of the inner surface of the first recess 81 may be higher than the hydrophilicity of the surface of the first lens portion 71. The hydrophilicity of the portion of the side surface of the base portion 61 that is in contact with the inner surface of the recess 80 may be higher than the hydrophilicity of the inner surface of the recess 80. The hydrophilicity of at least a portion of the side surface of the base portion 61 may be higher than the hydrophilicity of the surface of each lens portion 70.

[0183] Due to the hydrophilic relationship described above, water is less likely to remain on the surface of each lens portion 70 and the inner surface of each recess 80 compared to the side surface of the base portion 61. Even if water remains on the inner surface of each recess 80, the high hydrophilicity of the inner surface of each recess 80 causes the water to spread and dry easily.

[0184] <Multiple protrusions 90> The multiple protrusions 90 include a pair of first protrusions 91, a pair of second protrusions 92, and a pair of third protrusions 93, arranged in this order in the +Y direction, as shown in Figure 7A. The cross-sectional shape of each protrusion 90 in the XZ plane is triangular.

[0185] The first lens portion 71 is located between a pair of first convex portions 91 in a plan view. The second lens portion 72 is located between a pair of second convex portions 92 in a plan view. The third lens portion 73 is located between a pair of third convex portions 93 in a plan view.

[0186] Of the three pairs of protrusions 91-93, the tops of the protrusions 91-93 located on the same side coincide with the outer edge on the same side of the surface 61a of the base 61 in a plan view.

[0187] It is not necessary to provide all three pairs of protrusions 91-93. For example, any one or two pairs of protrusions from the three pairs 91-93 may be provided. Alternatively, at least one pair of protrusions from the three pairs 91-93 may be provided, but the other pair may be omitted. For example, only the protrusions 91-93 located on the same side of the three pairs 91-93 may be provided.

[0188] Water adhering to the surface 61a of the base portion 61 on the +X or -X side with respect to the first lens portion 71 moves to the surface of the first protrusion 91 on the same side as the adhering water, due to the surface tension of the surface of the first protrusion 91, moves downward, and is then discharged to the outside of the surface 61a of the base portion 61.

[0189] Water adhering to the surface 61a of the base portion 61 on the +X or -X side with respect to the second lens portion 72 moves to the surface of the second protrusion 92 on the same side as the adhering water, due to the surface tension of the second protrusion 92, and moves downward, and is then discharged to the outside of the surface 61a of the base portion 61 via the first recess 81.

[0190] Water adhering to the surface 61a of the base portion 61 on the +X or -X side with respect to the third lens portion 73 moves to the surface of the third protrusion 93 on the same side as the adhering water due to the surface tension of the third protrusion 93, and moves downward, and is then discharged to the outside of the surface 61a of the base portion 61 via the second recess 82.

[0191] With respect to the portion of the surface 61a of the base 61 that does not have recesses 80 and protrusions 90, the height of each protrusion 90 may be, for example, 50 μm or more and 300 μm or less.

[0192] The hydrophilicity of the surface of each protrusion 90 may be higher than that of the surface of the lens portion 70 located near each protrusion 90. For example, the hydrophilicity of the surface of the first protrusion 91 may be higher than that of the surface of the first lens portion 71. The hydrophilicity of the portion of the side surface of the base portion 61 that is in contact with the surface of each protrusion 90 may be higher than that of the surface of each protrusion 90.

[0193] Due to the hydrophilic relationship described above, water is less likely to remain on the surface of each lens portion 70 and each protrusion 90 compared to the side surface of the base portion 61. Even if water remains on the surface of each protrusion 90, the surface of each protrusion 90 is highly hydrophilic, so the water spreads and dries easily.

[0194] 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.

[0195] (Embodiment 7) The following describes a light-emitting device according to Embodiment 7 of the present disclosure with reference to Figures 8A to 8C. Figures 8A to 8C are a schematic 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 a light-emitting device according to exemplary Embodiment 7 of the present disclosure. The difference between the light-emitting device 1000G shown in Figures 8A to 8C and the light-emitting device 1000F shown in Figures 7A to 7D is the number and shape of the recesses 80 and protrusions 90.

[0196] <Multiple recesses 80> The multiple recesses 80 include a first recess 81 and a second recess 82 arranged in this order in the +Y direction in Figure 8A. A portion of the first recess 81 is located between the first lens portion 71 and the second lens portion 72 in a plan view. A portion of the second recess 82 is located between the second lens portion 72 and the third lens portion 73 in a plan view. The second lens portion 72 is located between the first recess 81 and the second recess 82 in a plan view. The first recess 81 and the second recess 82 are grooves extending along the X direction.

[0197] The first recess 81 has a first region 80a, a second region 80b, and a fourth region 80d. The second recess 82 has a sixth region 80f, a seventh region 80g, and a ninth region 80i. The arrangement of these regions is as described with reference to Figure 3A.

[0198] The multiple recesses 80 further include a pair of third recesses 83, a pair of fourth recesses 84, and a pair of fifth recesses 85, arranged in this order in the +Y direction. The first lens portion 71 is located between the pair of third recesses 83 in a plan view. The second lens portion 72 is located between the pair of fourth recesses 84 in a plan view. The third lens portion 73 is located between the pair of fifth recesses 85 in a plan view.

[0199] It is not necessary to provide all of the recesses 81, 82 and the three pairs of recesses 83-85. For example, only one of the recesses 81 or 82 may be provided, or any one or two pairs of recesses from the three pairs of recesses 83-85 may be provided. One or both of the recesses 81 and 82 may be provided, but the three pairs of recesses 83-85 may not be provided. At least one pair of recesses from the three pairs of recesses 83-85 may be provided, but recesses 81-82 may not be provided. For at least one pair of recesses from the three pairs of recesses 83-85, one recess may be provided, but the other recess may not be provided. For example, only the recesses 83-85 located on the same side of the three pairs of recesses 83-85 may be provided.

[0200] Of the surface 61a of the base portion 61, water adhering to the area between the first lens portion 71 and the second lens portion 72, near the second lens portion 72, is moved by gravity to the first recess 81 and discharged to the outside of the surface 61a along the first recess 81.

[0201] Of the surface 61a of the base portion 61, water adhering to the area between the second lens portion 72 and the third lens portion 73, and near the third lens portion 73, moves to the second recess 82 by gravity and is discharged to the outside of the surface 61a along the second recess 82.

[0202] Water adhering to the surface 61a of the base portion 61 on the +X or -X side relative to the first lens portion 71 can move to the third recess 83 on the same side as the adhering water, and then be discharged to the outside of the surface 61a via the third recess 83.

[0203] Water adhering to the surface 61a of the base portion 61 on the +X or -X side with respect to the second lens portion 72 can move to the fourth recess 84 on the same side as the adhering water, and then be discharged to the outside of the surface 61a via the fourth recess 84.

[0204] Water adhering to the surface 61a of the base portion 61 on the +X or -X side with respect to the third lens portion 73 can move to the fifth recess 85 on the same side as the adhering water, and then be discharged to the outside of the surface 61a through the fifth recess 85.

[0205] The width of each recess 80 may be, for example, 100 μm to 700 μm. The depth of each recess 80 may be, for example, 10 μm to 100 μm.

[0206] The depth of each recess 80 may increase as it moves away from the center of the lens portion 70 located near each recess 80 in the X direction. For example, the depth of the first recess 81 may increase as it moves away from the center of the first lens portion 71 in the X direction. Similarly, the depth of the second recess 82 may increase as it moves away from the center of the second lens portion 72 in the X direction. In this case, water adhering to the inner surface of each recess 80 is likely to move toward the outer edge of the surface 61a of the base portion 61 on the ±X direction side.

[0207] If the portion of the inner surface of each recess 80 that is in contact with the outer edge of the surface 61a of the base 61 on the ±X direction has the depth described above, then water adhering to this portion can be effectively discharged to the outside of the surface 61a of the base 61.

[0208] The hydrophilicity of the inner surface of each recess 80 may be higher than the hydrophilicity of the surface of the lens portion 70 located near each recess 80. For example, the hydrophilicity of the inner surface of the first recess 81 may be higher than the hydrophilicity of the surface of the first lens portion 71. The hydrophilicity of the portion of the side surface of the base portion 61 that is in contact with the inner surface of the recess 80 may be higher than the hydrophilicity of the inner surface of the recess 80. The hydrophilicity of at least a portion of the side surface of the base portion 61 may be higher than the hydrophilicity of the surface of each lens portion 70.

[0209] Due to the hydrophilic relationship described above, water is less likely to remain on the surface of each lens portion 70 and the inner surface of each recess 80 compared to the side surface of the base portion 61. Even if water remains on the inner surface of each recess 80, the high hydrophilicity of the inner surface of each recess 80 causes the water to spread and dry easily.

[0210] <Multiple protrusions 90> The multiple protrusions 90 include a pair of first protrusions 91, a pair of second protrusions 92, a pair of third protrusions 93, a pair of fourth protrusions 94, a pair of fifth protrusions 95, and a pair of sixth protrusions 96, all arranged in this order in the +Y direction in Figure 8A. The cross-sectional shape of each protrusion 90 in the XZ plane is trapezoidal.

[0211] A portion of the first lens portion 71 on the -Y direction side is located between a pair of first convex portions 91 in a plan view. The pair of first convex portions 91 are positioned in the X direction so as to sandwich the portion of the first lens portion 71 on the -Y direction side. A portion of the first lens portion 71 on the +Y direction side is located between a pair of second convex portions 92 in a plan view. The pair of second convex portions 92 are positioned in the X direction so as to sandwich the portion of the first lens portion 71 on the +Y direction side.

[0212] A portion of the second lens portion 72 on the -Y direction side is located between a pair of third convex portions 93 in a plan view. The pair of third convex portions 93 are positioned in the X direction so as to sandwich a portion of the second lens portion 72 on the -Y direction side. A portion of the second lens portion 72 on the +Y direction side is located between a pair of fourth convex portions 94 in a plan view. The pair of fourth convex portions 94 are positioned in the X direction so as to sandwich a portion of the second lens portion 72 on the +Y direction side in a plan view.

[0213] A portion of the third lens portion 73 on the -Y direction side is located between a pair of fifth convex portions 95 in a plan view. The pair of fifth convex portions 95 are positioned in the X direction so as to sandwich a portion of the third lens portion 73 on the -Y direction side. A portion of the third lens portion 73 on the +Y direction side is located between a pair of sixth convex portions 96 in a plan view. The pair of sixth convex portions 96 are positioned in the X direction so as to sandwich a portion of the third lens portion 73 on the +Y direction side in a plan view.

[0214] Of the six pairs of protrusions 91-96, the outer edges of the six pairs of protrusions 91-96 located on the same side that are substantially parallel to the Y direction coincide with the outer edge of the surface 61a of the base 61 located on the same side in a plan view.

[0215] It is not necessary to provide all six pairs of protrusions 91-96. For example, any one to five pairs of protrusions from these six pairs 91-96 may be provided. Alternatively, of the six pairs of protrusions 91-96, at least one pair may be provided, but the other pair may be omitted. For example, of the six pairs of protrusions 91-96, only the protrusions 91-96 located on the same side may be provided.

[0216] Water adhering to the +X or -X side of the surface 61a of the base 61, relative to the first lens portion 71 on the -Y side, moves to the surface of the first protrusion 91 on the same side as the adhering water due to the surface tension of the surface of the first protrusion 91, moves downward, and is then discharged to the outside of surface 61a. Water adhering to the +X or -X side of the surface 61a of the base 61, relative to the first lens portion 71 on the +Y side, moves to the surface of the second protrusion 92 on the same side as the adhering water due to the surface tension of the surface of the second protrusion 92, moves downward, and is then discharged to the outside of surface 61a via the third recess 83 on the same side.

[0217] Water adhering to the +X or -X side of the surface 61a of the base 61, relative to the second lens portion 72 on the -Y side, moves to the surface of the third protrusion 93 on the same side as the adhering water due to the surface tension of the third protrusion 93, moves downward, and is then discharged to the outside of the surface 61a via the first recess 81. Water adhering to the +X or -X side of the surface 61a of the base 61, relative to the second lens portion 72 on the +Y side, moves to the surface of the fourth protrusion 94 on the same side as the adhering water due to the surface tension of the fourth protrusion 94, moves downward, and is then discharged to the outside of the surface 61a via the fourth recess 84 on the same side.

[0218] Water adhering to the surface 61a of the base 61 on the +X or -X side, relative to the third lens portion 73 on the -Y side, moves to the surface of the fifth protrusion 95 on the same side as the adhering water due to the surface tension of the surface of the fifth protrusion 95, moves downward, and is then discharged to the outside of the surface 61a via the second recess 82. Water adhering to the surface 61a of the base 61 on the +X or -X side, relative to the third lens portion 73 on the +Y side, moves to the surface of the sixth protrusion 96 on the same side as the adhering water due to the surface tension of the surface of the sixth protrusion 96, moves downward, and is then discharged to the outside of the surface 61a via the fifth recess 85 on the same side.

[0219] The surface tension of the pair of second protrusions 92 and the pair of third protrusions 93 is stronger than the surface tension of the portion of the base 61a surface 61a between the first lens portion 71 and the second lens portion 72. Therefore, water adhering between the first lens portion 71 and the second lens portion 72 is easily transferred to the surfaces of the pair of second protrusions 92 and the pair of third protrusions 93.

[0220] Similarly, the surface tension of the pair of fourth protrusions 94 and the pair of fifth protrusions 95 is stronger than the surface tension of the portion of the base 61a surface 61a between the second lens portion 72 and the third lens portion 73. Therefore, water adhering between the second lens portion 72 and the third lens portion 73 is more likely to move to the surfaces of the pair of fourth protrusions 94 and the pair of fifth protrusions 95.

[0221] With respect to the portion of the surface 61a of the base 61 that does not have recesses 80 and protrusions 90, the height of each protrusion 90 may be, for example, 50 μm or more and 300 μm or less.

[0222] The hydrophilicity of the surface of each protrusion 90 may be higher than that of the surface of the lens portion 70 located near each protrusion 90. For example, the hydrophilicity of the surface of the first protrusion 91 may be higher than that of the surface of the first lens portion 71. The hydrophilicity of the portion of the side surface of the base portion 61 that is in contact with the surface of each protrusion 90 may be higher than that of the surface of each protrusion 90.

[0223] Due to the hydrophilic relationship described above, water is less likely to remain on the surface of each lens portion 70 and each protrusion 90 compared to the side surface of the base portion 61. Even if water remains on the surface of each protrusion 90, the high hydrophilicity of the surface of each protrusion 90 causes the water to spread and dry quickly.

[0224] Based on the above, in the light-emitting device 1000G according to Embodiment 7, 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 1000G due to water accumulated between the lens portions 70.

[0225] (Method for manufacturing the molded resin part 60) In the light-emitting devices 1000A to 1000G according to Embodiments 1 to 7, the molded resin portion 60 can be formed, for example, by the following method.

[0226] In the first step, a resin package 100 is prepared containing the components of the light-emitting devices 1000A to 1000G, 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 process to house the light-emitting elements 50 in the resin package 100. In the next step, 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, recesses 80 and / or protrusions 90 can be formed in the molded resin portion 60. The recesses 80 may be formed by removing a part of the molded resin portion 60 with a blade or the like.

[0227] (Details of the configuration of the light-emitting device 1000A other than the recess 80) The details of the configuration of the light-emitting device 1000A according to Embodiment 1, other than the recess 80, will be described below with reference to Figures 9A to 9D. The configuration of the light-emitting device 1000A according to Embodiment 1, other than the recess 80, is also disclosed in Patent Document 1. All of the contents of that disclosure are incorporated herein by reference.

[0228] Figure 9A 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 9B 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 9C and 9D are cross-sectional views taken along the IXC-IXC line and the IXD-IXD line, respectively, of the resin package 100 shown in Figure 9B. Figures 10A and 10B are schematic side views taken from the -Y direction and the +X direction, respectively, 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.

[0229] 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 9A, a reflective member 150 and light-absorbing members 160 and 190.

[0230] The components of the light-emitting device 1000A are described below.

[0231] <Resin package 100> As shown in Figure 9A, 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.

[0232] As shown in Figures 9B to 9D, 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 9B. 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 9C. The bottom surface 20A includes an exposed area 30 for at least one lead. As shown in Figure 9C, the inner surface 20B of the mounting area 20 is integrally formed with the resin member 40 which 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 which constitutes part of the bottom surface 20A. The mounting area 20 may be an area on which the reflective member 150 or light-absorbing member 190 shown in Figure 9A is placed. Wires may be connected within the mounting area 20.

[0233] As shown in Figure 9B, 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.

[0234] 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 9B. 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.

[0235] 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 9C, 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.

[0236] As shown in Figure 9C, 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 9B, in a 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.

[0237] As shown in Figure 10A, 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.

[0238] <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.

[0239] 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).

[0240] <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.

[0241] In the light-emitting device 1000A, as shown in Figure 9C, 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.

[0242] As shown in Figure 9A, 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.

[0243] <50 light-emitting elements> Each light-emitting element 50 is placed in the exposed area 30 of the mounting area 20, as shown in Figure 9B. The first light-emitting element 51 is placed 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 9A.

[0244] As shown in Figure 9B, the second light-emitting element 52 is positioned in the exposed area 30 of the pair of second leads 12 in the second mounting area 22. As shown in Figure 9A, the second light-emitting element 52 is electrically connected to the pair of second leads 12 using wires 32.

[0245] As shown in Figure 9B, the third light-emitting element 53 is positioned in the exposed area 30 of the pair of third leads 13 in the second mounting area 22. As shown in Figure 9A, the third light-emitting element 53 is electrically connected to the pair of third leads 13 using wires 33.

[0246] 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.

[0247] 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.

[0248] As shown in Figure 9B, 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] 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.

[0253] 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.

[0254] As shown in Figure 9B, 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.

[0255] The wire 31 shown in Figure 9A, 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 9B. The wire 32 shown in Figure 9A, 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 9B. The same applies to the wire 33 shown in Figure 9A, which electrically connects the third light-emitting element 53 to a pair of third leads 13.

[0256] <Reflective material 150> As shown in Figure 9A, 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.

[0257] 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 10A and 10B. For example, the translucent resin member is positioned between the inner surfaces 20D shown in Figure 9C, which face each other in 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.

[0258] <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 9A, 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 taken 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 10A and 10B. 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.

[0259] The first light emitted by the first light-emitting element 51 passes through the first lens unit 71 and is emitted in the +Z direction of the light-emitting device 1000A. The emission direction and distribution of the first light are controlled by the first lens unit 71. Similarly, the second light emitted by the second light-emitting element 52 passes through the second lens unit 72, and the third light emitted by the third light-emitting element 53 passes through the third lens unit 73. The second lens unit 72 and the third lens unit 73 control the light distribution of the second light and the third light, respectively.

[0260] In plan view, the centers of the first lens unit 71, the second lens unit 72, and the third lens unit 73 arranged in the Y direction may be located in a straight line substantially parallel to the Y direction. Note that the arrangement of the lens units 70 is not limited to this example. For example, the center of the lens unit located at the center in the X direction or the Y direction among the first lens unit 71, the second lens unit 72, and the third lens unit 73 may not be located on the line connecting the centers of the other two lens units.

[0261] <Base 61> The base 61 is a part of the mold resin part 60 which is a covering member. As shown in FIGS. 10A and 10B, the base 61 has a side surface portion 61b in addition to the surface 61a. The side surface portion 61b covers a part of the outer portion 100c of the resin package 100 in the direction from the surface 61a of the base 61 toward the back surface 100b of the resin package 100. The side surface portion 61b continuously covers from the surface 61a of the base 61 to a part of the outer portion 100c of the resin package 100. The lens unit 70 and the base 61 can use the same material.

[0262] The surface roughness of the base 61 in the portion not including the concave portion 80 and the convex portion 90 is not particularly limited, but it is preferably larger from the viewpoint of reducing the glare on the surface 61a of the base 61. Among the surface 61a of the base 61, in plan view, the surface roughness of at least the portion overlapping with the reflective member 150 is preferably larger than the surface roughness of the lens unit 70. Thereby, the contrast ratio of the light-emitting device 1000A can be further improved.

[0263] <Light absorption members 160, 190> It is preferable to dispose a light absorption member 190 around the first light-emitting element 51. By disposing the light absorption member 190, reflection by the pair of first leads can be reduced, and thus a decrease in the contrast ratio can be reduced.

[0264] As shown in FIGS. 9A and 9B, a light absorption member 160 is disposed in the wire connection region 26. By disposing the light absorption member 160, reflection by the pair of second leads 12 and the pair of third leads 13 can be reduced. The light absorption member 160 can be made of the same material as the light absorption member 190.

[0265] <Convex portion 47> As shown in FIG. 9B, the light-emitting device 1000A has a plurality of convex portions 47 disposed in the wire connection region 26 in a plan view. In the plan view, it is preferable that a part of each convex portion 47 is disposed so as to overlap the corresponding lead 10. Thereby, the contact area between the pair of second leads 12 and the pair of third leads 13 and the resin member 40 in the resin package 100 can be increased. In the light-emitting device 1000A, the convex portions 47 may be omitted. When the convex portions 47 are omitted, it is easy to dispose a light absorption member in the wire connection region 26.

[0266] The present disclosure includes the light-emitting device and the display device described in the following items. [Item 1] A support having a first surface and a second surface located on the opposite side of 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, A covering member covering the first light-emitting element and the second light-emitting element, Comprising The covering member is A base portion overlapping the first light-emitting element and the second light-emitting element in a plan view as viewed from the first surface side, surrounding the support, and having an extending portion extending outside the base portion, A first lens portion located on the base portion and overlapping the first light-emitting element in the plan view, A second lens portion is located on the base and overlaps the second light-emitting element in a plan view, The recess provided in the base, It has, The aforementioned recess 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 light-emitting device having the following features. [Item 2] The light-emitting device according to item 1, wherein the recess is a third region connected to the second region, and further comprises the third region located in a second direction perpendicular to the first direction with respect to the first lens portion in a plan view. [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 recess includes two first grooves extending in the first direction and two second grooves extending in a second direction perpendicular to the first direction, each of which is connected to both of the two first grooves. The second lens portion is surrounded by the two first grooves and the two second grooves, A light-emitting device as described in any one of items 1 to 3. [Item 5] The light-emitting device according to any one of items 1 to 3, wherein the outer edge of the recess has a portion that extends away from the center of the second lens portion in the first direction as it moves away from the center of the first lens portion in the second direction perpendicular to the first direction. [Item 6] The light-emitting device according to any one of items 1 to 3 and 5, wherein the dimension of the recess 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 hydrophilicity of the inner surface of the recess is higher than the hydrophilicity of the surface of the first lens portion. [Item 8] The light-emitting device according to item 7, wherein the inner surface of the recess is rougher than the surface of the first lens portion. [Item 9] The light-emitting device according to item 3, wherein the hydrophilicity of at least a portion of the side surface of the base is higher than the hydrophilicity of the surface of the first lens portion. [Item 10] The light-emitting device according to any one of items 1 to 9, wherein the depth of the recess increases as it moves away from the center of the first lens portion in a second direction perpendicular to the first direction. [Item 11] The aforementioned recess 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, A light-emitting device according to item 2 or 3, further comprising: [Item 12] The covering member further has a second recess provided on the base and located away from the first recess which is the recess, The second recess is, In the plan view, the 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, A light-emitting device according to any one of items 1 to 11, having the following characteristics: [Item 13] The light-emitting device according to item 12, wherein the second recess is an eighth region connected to the seventh region, and further comprises the eighth region located in a second direction perpendicular to the first direction with respect to the second lens portion in a plan view. [Item 14] A mounting board 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 13, comprising A display device in which, in use, with the vertical direction being downward, the first lens part is located below the second lens part.

Industrial Applicability

[0267] The light-emitting device and display device of the present disclosure can be used, for example, in an environment where water adheres to the surface. Even when water adheres to the surface, it is difficult for water to accumulate on the surface of the lens. Therefore, it is possible to reduce the change in the light distribution characteristics of the light-emitting device due to the water accumulated on the surface of the lens.

Explanation of Reference Numerals

[0268] 1: Mounting substrate 1a: Mounting surface 3: Waterproof resin 10: Pair of leads 10a to 10c: First to third portions of the lead 11 to 13: Pair of first to third leads 20: Mounting region 21 to 22: First to second mounting regions 20A: Bottom surface 20B: Inner surface 20C: Bottom surface 20D: Inner surface 20D1: First inner surface 20D2: Second inner surface 20DS: Step surface 26: Wire connection region 30: Exposed region 31 to 33: Wires 40: Resin member 47: Protrusion 50: Light-emitting element 51 to 53: First to third light-emitting elements 60: Mold resin part 61: Base portion 61a: Surface 61b: Side surface portion 64: Extension portion 70: Lens part 71 to 73: First to third lens parts 80: Recess 80a to 80о: First to fifteenth regions 81 to 85: First to fifth recesses 84a to 84c: First to third grooves 90: Protrusion 91 to 96: First to sixth protrusions 100: Resin package 100a: Main surface 100a: Main surface 100b: Back surface 100c: Outer portion 150: Reflective member 160: Light absorption member 190: Light absorption member 900, 1000A to 1000G: 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 A base that overlaps the first light-emitting element and the second light-emitting element in a plan view from the first surface, the base having an extended portion that surrounds the support and extends outward from the base, 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, The recess provided in the base, It has, The aforementioned recess 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 light-emitting device having the following features.

2. The light-emitting device according to claim 1, wherein the recess is a third region connected to the second region, and further comprises the third region located in a second direction perpendicular to the first direction with respect to the first lens portion in a plan view.

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 recess includes two first grooves extending in the first direction and two second grooves extending in a second direction perpendicular to the first direction, each of which is connected to both of the two first grooves. The second lens portion is surrounded by the two first grooves and the two second grooves. A light-emitting device according to any one of claims 1 to 3.

5. The light-emitting device according to any one of claims 1 to 3, wherein the outer edge of the recess 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 recess 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 hydrophilicity of the inner surface of the recess is higher than the hydrophilicity of the surface of the first lens portion.

8. The light-emitting device according to claim 7, wherein the surface roughness of the inner surface of the recess is greater than the surface roughness of the surface of the first lens portion.

9. The light-emitting device according to claim 3, wherein the hydrophilicity of at least a portion of the side surface of the base is higher than that of the surface of the first lens portion.

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

11. The aforementioned recess 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 or 3, further comprising the above.

12. The covering member further has a second recess provided on the base and located away from the first recess which is the recess, The second recess 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, A light-emitting device according to any one of claims 1 to 3, having the following features.

13. The light-emitting device according to claim 12, wherein the second recess is an eighth region connected to the seventh region, and further comprises the eighth region located in a second direction perpendicular to the first direction with respect to the second lens portion in a plan view.

14. 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.

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