Light-emitting device

Abstract

To provide a light-emitting device capable of improving light extraction efficiency.SOLUTION: A light-emitting device includes a base including an outer surface, an upper surface intersecting the outer surface, and a recess provided on the upper surface, a light-emitting element arranged in the recess, a lens arranged on the upper surface and having a lens portion and a flange portion, and a reflective member arranged in contact with the upper surface and side surfaces of the flange portion.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present disclosure relates to a light-emitting device.

Background Art

[0002] Conventionally, a light-emitting device has been disclosed that has a lens disposed above a light-emitting element and an adhesive disposed on a side surface of the lens (see, for example, Patent Document 1).

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An embodiment of the present disclosure aims to provide a light-emitting device capable of improving light extraction efficiency.

Means for Solving the Problems

[0005] The light-emitting device according to an embodiment of the present disclosure includes a substrate including an outer surface, an upper surface intersecting the outer surface, and a recess provided on the upper surface side, a light-emitting element disposed in the recess, a lens disposed on the upper surface and including a lens portion and a flange portion, and a reflecting member disposed in contact with the upper surface and a side surface of the flange portion.

Effects of the Invention

[0006] According to an embodiment of the present disclosure, a light-emitting device capable of improving light extraction efficiency can be provided.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

[0008] The light-emitting device according to the embodiment of the present disclosure will be described in detail with reference to the drawings. However, the embodiments shown below are examples of light-emitting devices for embodying the technical idea of the present embodiment, and are not limited thereto. In addition, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments are not intended to limit the scope of the present disclosure only thereto, but are merely illustrative examples unless specifically described. Note that the sizes, positional relationships, etc. of the members shown in each drawing may be exaggerated for clarity of explanation. In the following description, the same names and reference numerals denote the same or similar members, and detailed descriptions thereof are appropriately omitted.

[0009] In addition, in the following description, terms indicating specific directions and positions (for example, "up", "down" and other terms including these terms) may be used. These terms are merely used for easy understanding of the relative positions, orientations, directions, etc. in the referenced drawings, and do not have to match the relationships during the use of the light-emitting device according to the embodiment. In addition, these directions are independent of the direction of gravity.

[0010] [First Embodiment] Referring to FIGS. 1 and 2, the configuration of the light-emitting device according to the first embodiment will be described. FIG. 1 is a schematic top view showing an example of the configuration of the light-emitting device 1 according to the first embodiment. FIG. 2 is a schematic end view taken along line II-II in FIG. 1.

[0011] As shown in FIGS. 1 and 2, the light-emitting device 1 includes a substrate 10 including an outer surface 11, an upper surface 12 intersecting the outer surface 11, and a recess 13 provided on the upper surface 12 side, and a light-emitting element 20 disposed in the recess 13. The light-emitting device 1 also includes a lens 30 disposed on the upper surface 12 and having a lens portion 31 and a flange portion 32, and a reflecting member 40 disposed in contact with the upper surface 12 and the side surface 321 of the flange portion 32.

[0012] In the example shown in FIG. 2, the light L1 indicated by the arrow represents a part of the light emitted from the light-emitting element 20 and directed toward the center of the lens portion 31 in the lens 30. Each of the lights L2 and L3 indicated by the arrows represents a part of the light emitted from the light-emitting element 20 and directed toward the side surface 321 of the flange portion 32 in the lens 30. The light L21 indicated by the arrow represents the light reflected by the reflecting member 40 from the light L2. The light L31 indicated by the arrow represents the light reflected by the reflecting member 40 from the light L3. In the light-emitting device 1, among the light from the light-emitting element 20, lights such as the lights L2 and L3 directed toward the side surface 321 of the flange portion 32 in the lens 30 are reflected by the reflecting member 40 so as to be extractable from the light-emitting device 1. Thereby, in the present embodiment, a light-emitting device 1 capable of improving the light extraction efficiency can be provided.

[0013] In the example shown in FIG. 1, the reflecting member 40 surrounds the flange portion 32 in a top view. Further, the reflecting member 40 is disposed in contact with the side surface 321 of the flange portion 32 so as to surround the flange portion 32. Thereby, since the light directed toward the side surface 321 of the flange portion 32 in the lens 30 can be extracted from the entire periphery of the lens 30 in a top view, the light extraction efficiency of the light-emitting device 1 can be increased.

[0014] In the examples shown in FIGS. 1 and 2, the flange portion 32 has a rectangular shape including a curved surface 34 at the corner portion 33 in a top view. Here, the corner portion refers to a region near the intersection where two sides meet. For example, in a top view, if the flange portion 32 has a shape where two sides are orthogonal at the corner portion 33, the distance between the intersection of the two sides and the optical axis C of the lens 30 becomes long, and light reflected by the reflecting member 40 provided at the intersection of the two sides may not be incident on the lens 30. As a result, the amount of light not incident on the lens 30 increases, and the light extraction efficiency from the light-emitting device 1 may decrease. On the other hand, since the flange portion 32 has a rectangular shape including the curved surface 34 at the corner portion 33 in a top view, the distance between the reflecting member 40 disposed on the curved surface 34 of the corner portion 33 and the optical axis C of the lens 30 can be shortened. Thereby, in the light-emitting device 1, it is possible to reduce the non-incidence of the light reflected by the reflecting member 40 on the lens 30 and increase the light extraction efficiency from the light-emitting device 1. Note that the shape of the lens 30 in a top view is not limited to a rectangle, and may be a circle, an ellipse, a substantially polygon, or the like.

[0015] Hereinafter, details of the configuration of the light-emitting device 1 according to the first embodiment will be described.

[0016] (Substrate 10) In the example shown in FIG. 1, in a top view, the outer shape of the substrate 10 is substantially rectangular. The substantially rectangular shape includes, in addition to a rectangle, a shape in which a part of the corner of the rectangle is removed, a shape in which the corner of the rectangle is rounded, or the like. However, the outer shape of the substrate 10 in a top view is not limited to a rectangle, and may be a circle, an ellipse, a polygon, or the like. In the example shown in FIG. 2, the upper surface 12 of the substrate 10 is the upper surface of the side wall portion 15. The concave portion 13 is defined by the inner surface 151 and the bottom surface 14 of the side wall portion 15. The bottom surface 14 is the bottom of the concave portion 13.

[0017] The substrate 10 is mainly composed of an insulating base material. The insulating base material includes, for example, ceramics. The ceramics are preferably those having high heat resistance and weather resistance. As the ceramics, for example, aluminum nitride, aluminum oxide, and mullite can be used.

[0018] (Light-emitting element 20) The light-emitting element 20 emits ultraviolet light. The peak wavelength of the ultraviolet light emitted by the light-emitting element 20 is, for example, 200 nm or more and 410 nm or less. The light-emitting element 20 is disposed on the bottom surface 14 of the substrate 10. When the light-emitting element 20 has a substantially rectangular shape in top view, the light-emitting element 20 is preferably arranged such that the sides of the light-emitting element 20 are substantially parallel to the sides of the substrate 10 in top view. With such an arrangement, absorption of the light emitted from the light-emitting element 20 by the inner surface 151 of the substrate 10 can be reduced. However, the light-emitting element 20 may be arranged such that the angle bisector of the angle with respect to the vertex of the light-emitting element 20 is substantially parallel to the side of the substrate 10 in top view. The light-emitting element 20 is located in the space within the recess 13. The space within the recess 13 is defined by the inner surface 151 of the side wall portion 15, the bottom surface 14, and the lower surface 35 of the lens 30. Note that the lower surface 323 of the flange portion 32 is also the lower surface 35 of the lens 30.

[0019] (Lens 30) The lens 30 transmits the light emitted from the light-emitting element 20. The lens 30 can transmit the light from the light-emitting element 20 and emit it after focusing or diverging it. Note that "focusing light" includes collimating light. The lens 30 is a plano-convex lens having a plane surface facing the light-emitting element 20 and a convex surface on the side opposite to the surface facing the light-emitting element 20. However, the lens 30 may be a plano-concave lens having a concave surface on the side opposite to the surface facing the light-emitting element 20. Further, the lens 30 may be a lens array including a plurality of convex or concave surfaces on the side opposite to the surface facing the light-emitting element 20. Also, the lens 30 may be a Fresnel lens, a diffractive lens, or the like.

[0020] In top view, in the direction perpendicular to one side of the substrate 10, the length of the lens 30 is shorter than the length of the substrate 10. Also, in top view, in both the direction perpendicular to and the direction parallel to one side of the substrate 10, the length of the lens 30 is shorter than the length of the substrate 10. With such a configuration, an area for arranging the reflecting member 40 can be secured on the side surface 321 of the flange portion 32 in the lens 30.

[0021] The lens 30 is composed of a light-transmissive glass (such as borosilicate glass, fused quartz) material or the like. The light transmittance of the lens 30 preferably has a transmittance of 60% or more with respect to the peak wavelength of the light emitted from the light-emitting element 20, and more preferably has a transmittance of 90% or more.

[0022] The lens portion 31 has a lens surface and is a portion that realizes the lens function. Among the lens 30, the portion overlapping the lens surface in a side view can also be defined as the lens portion 31. In a top view, a part of the outer edge of the lens portion 31 overlaps the upper surface 12 of the base 10. Also, in a top view, another part of the outer edge of the lens portion 31 overlaps the concave portion 13 of the base 10.

[0023] The flange portion 32 is a portion provided at the lower part of the lens portion 31. In other words, the lens 30 has a shape in which the lens portion 31 is provided on the flange portion 32. The flange portion 32 has a side surface 321, an upper surface 322 intersecting the side surface 321, and a lower surface 323 disposed on the opposite side of the upper surface 322. By having the flange portion 32, the lens 30 can be stably fixed to the base 10.

[0024] (Reflection member 40) For the reflection member 40, for example, a white resin or a resin containing metal powder, a white paint or a paint containing metal powder, a metal film, a metal foil, a metal plate, etc. can be used. Also, the reflection member 40 can be configured based on an inorganic material such as an inorganic polymer. Examples of the inorganic material include ceramic-based, cement-based, sodium silicate, aluminum phosphate, etc. Also, a mixture containing silica and an alkali metal may be used as the inorganic material. The reflection member 40 is a member in a state where the resin or paint is solidified.

[0025] When using a resin or paint as the reflective member 40, the resin or paint is arranged in a state having fluidity in contact with the upper surface 12 and the side surface 321 of the flange portion 32 in contact with the reflective member 40. Thereafter, by drying, the resin or paint is arranged in contact with the upper surface 12 and the side surface 321 of the flange portion 32. However, since the resin or paint as the reflective member 40 has fluidity when arranged in contact with the upper surface 12 and the side surface 321 of the flange portion 32, there is a possibility of leaking outside the base body 10. In the light-emitting device 1 shown in FIG. 1, since the lens 30 is smaller than the base body 10 in a top view, there is a space for retaining the resin or paint on the upper surface 12 of the base body 10. Thereby, even when the resin or paint as the reflective member 40 is in a state having fluidity, the possibility of the resin or the paint leaking outside the base body 10 can be reduced, and the reflective member 40 can be stably provided.

[0026] It is preferable that the ratio of the area covered by the reflective member 40 to the surface area of the side surface 321 of the flange portion 32 in the lens 30 is 95% or more and 100% or less. By setting it within this range, the light extraction efficiency of the light-emitting device 1 can be further enhanced. Further, it is preferable that the reflective member 40 is joined not only to the side surface 321 but also to the upper surface 12 of the base body 10. With this configuration, the joining strength between the lens 30 and the base body 10 can be increased via the reflective member 40.

[0027] In a top view, the width d1 of the reflecting member 40 on the diagonal line 191 of the base 10 is, for example, 0.1 mm or more and 0.37 mm or less. By setting it to 0.1 mm or more, the light directed toward the side surface 321 of the flange portion 32 of the lens 30 can be sufficiently reflected. Also, by setting it to 0.37 mm or less, the possibility that the reflecting member 40 protrudes from the outer edge of the base 10 and is applied can be reduced in a top view. Further, in a top view, the width d2 of the reflecting member 40 on the perpendicular bisector of the side of the base 10 is, for example, 0.05 mm or more and 0.1 mm or less. By setting it to 0.05 mm or more, the bonding strength between the reflecting member 40 and the base 10 can be increased. Also, by setting it to 0.1 mm or less, the possibility that the reflecting member 40 protrudes from the outer edge of the base 10 and is applied can be reduced in a top view.

[0028] Also, in the example shown in FIG. 1, the concave portion 13 has a rectangular shape including a curved surface 18 at the corner portion 17 in a top view. In a top view, the width d1 of the reflecting member 40 on the diagonal line 191 of the base 10 is larger than the width d2 of the reflecting member 40 on the perpendicular bisector 192 of the side of the base 10. By making the width d1 larger than the width d2, in a top view, the area of the reflecting member 40 provided at the corner portion 33 of the flange portion 32 is larger than the area of the reflecting member 40 provided at a portion other than the corner portion 33. Thereby, the bonding strength between the base 10 and the lens 30 can be increased.

[0029] Also, in the example shown in FIG. 1, in a top view, the width of the portion where the upper surface 12 of the lens 30 and the base 10 overlap is smaller than the width W2 of the corner portion 17 compared to the width W1 of the portion where the joining member 60 is disposed. At the corner portion 33 of the flange portion 32, the area where the base 10 and the flange portion 32 overlap in a top view is smaller compared to the portion other than the corner portion 33. Therefore, accordingly, the area joined by the reflecting member 40 becomes smaller, and the bonding strength between the base 10 and the lens 30 may become lower. By providing the joining member 60 at a portion other than the corner portion 33 of the flange portion 32, it is possible to reduce the decrease in the bonding strength between the base 10 and the lens 30.

[0030] [Second Embodiment] Next, the configuration of the light-emitting device according to the second embodiment will be described. Note that the same names and reference numerals as those in the already described embodiments indicate the same or similar members or configurations, and detailed descriptions thereof will be omitted as appropriate. This also applies to the embodiments described hereinafter.

[0031] FIG. 3 is a schematic top view showing an example of the light-emitting device 1 according to the second embodiment. FIG. 4 is a schematic end view taken along line IV-IV in FIG. 3.

[0032] As shown in FIGS. 3 and 4, the light-emitting device 1 according to the present embodiment has a translucent member 50 disposed between the lens 30 and the light-emitting element 20, and the reflecting member 40 is mainly different from the first embodiment in that it is disposed in contact with each of the side surface 321 of the flange portion 32 of the lens 30 and the side surface 51 of the translucent member 50.

[0033] In the present embodiment, the lens 30 is disposed on the base 10 via the translucent member 50. For example, when the lens 30 is directly joined to the base 10, the fixing of the lens 30 can be stabilized by interposing the translucent member 50 in a case where the joining becomes unstable due to the difference in the thermal expansion coefficients of the base 10 and the lens 30. In the example shown in FIGS. 3 and 4, the light L1a indicated by the arrow represents a part of the light emitted from the light-emitting element 20 that travels toward the center of the lens portion 31 of the lens 30. Each of the light L2a and the light L3a indicated by the arrow represents a part of the light emitted from the light-emitting element 20 that travels toward the side surface 321 of the flange portion 32 and the side surface 51 of the translucent member 50 of the lens 30, respectively. The light L21a indicated by the arrow represents the light obtained by reflecting the light L2a by the reflecting member 40. The light L31a indicated by the arrow represents the light obtained by reflecting the light L3a by the reflecting member 40. In the present embodiment, among the light from the light-emitting element 20, light such as the light L2a and the light L3a that travels toward the side surface 321 of the flange portion 32 and the side surface 51 of the translucent member 50 of the lens 30 can be taken out from the light-emitting device 1 by reflecting it with the reflecting member 40. As described above, in the present embodiment, it is possible to provide the light-emitting device 1 that can improve the light extraction efficiency while stabilizing the fixing of the lens 30.

[0034] The light-transmissive member 50 is disposed on the upper surface 12 of the base 10. The light-transmissive member 50 is a member having light-transmitting properties that allow at least the light emitted from the light-emitting element 20 to pass through. The light-transmissive member 50 transmits 60% or more of the light emitted from the light-emitting element 20, preferably 90% or more.

[0035] The light-transmissive member 50 is disposed on the base 10 so as to cover the space within the recess 13 in which the light-emitting element 20 is disposed. By covering the space within the recess 13 with the light-transmissive member 50, the light-emitting element 20 can be protected from moisture, organic substances, etc. contained in the outside air. The lower surface 52 of the light-transmissive member 50 includes a first region 521 disposed directly above the upper surface 12 of the base 10 and a second region 522 disposed directly above the bottom surface 14. The second region 522 faces the upper surface of the light-emitting element 20 with the space within the recess 13 therebetween.

[0036] The outer shape of the light-transmissive member 50 is plate-like. Also, in a top view, the light-transmissive member 50 has a rectangular shape. However, the corners of the light-transmissive member 50 may be chamfered or otherwise processed. Note that the shape of the light-transmissive member 50 can be appropriately selected according to the use of the light-emitting device 1 and the like. However, from the viewpoint of enhancing the airtightness of the space within the recess 13 by covering the space within the recess 13, at least the lower surface 52 of the light-transmissive member 50 is preferably flat.

[0037] In a top view, in a direction perpendicular to one side of the base 10, the length of the light-transmissive member 50 is shorter than the length of the base 10. Also, in a top view, in both a direction perpendicular and parallel to one side of the base 10, the length of the light-transmissive member 50 is shorter than the length of the base 10. By adopting such a configuration, a region for disposing the reflecting member 40 can be secured on each of the side surface 321 of the flange portion 32 of the lens 30 and the side surface 51 of the light-transmissive member 50.

[0038] In the examples shown in FIGS. 3 and 4, the light-transmissive member 50 may include sapphire. When the base material of the base 10 contains ceramic, the difference in the linear expansion coefficient between sapphire and ceramic is small. Therefore, by including sapphire in the light-transmissive member 50, even if there is a temperature change or the like around the light-emitting device 1, the expansion difference between the base 10 and the light-transmissive member 50 can be reduced, and the stress load corresponding to the expansion difference between the base 10 and the light-transmissive member 50 can be reduced. Further, a decrease in the bonding force between the base 10 and the light-transmissive member 50 using a bonding member can be reduced. However, the material of the light-transmissive member 50 is not limited to sapphire, and can be appropriately selected according to the use of the light-emitting device 1, the material of the base 10, and the like.

[0039] [Third Embodiment] With reference to FIGS. 5 and 6, the configuration of the light-emitting device according to the third embodiment will be described. FIG. 5 is a schematic top view showing an example of the light-emitting device 1 according to the third embodiment. FIG. 6 is a schematic end view showing an example of line VI-VI in FIG. 5.

[0040] As shown in FIGS. 5 and 6, the light-emitting device 1 according to the third embodiment further has a bonding member 60 that bonds the lens 30 to the upper surface 12 of the base 10, and the point where the reflecting member 40 contacts the bonding member 60 is mainly different from that in the first embodiment.

[0041] In the example shown in FIGS. 5 and 6, the bonding member 60 is disposed between the lower surface 35 of the lens 30 and the upper surface 12 of the base 10. The reflecting member 40 is disposed in contact with the side surface 61 of the bonding member 60.

[0042] The bonding member 60 bonds the lens 30 and the base 10. The bonding member 60 is, for example, an adhesive member configured based on a metal material such as gold-tin, solder alloy, or brazing material. Further, for example, the bonding member 60 may be an adhesive member configured based on an inorganic material such as an inorganic polymer. Examples of the inorganic material include ceramic-based, cement-based, sodium silicate, and aluminum phosphate. Further, a mixture containing silica and an alkali metal may be used as the inorganic material. The reflecting member 40 is a member in a state where a resin or a paint is solidified.

[0043] In this embodiment, a metal film may be provided on each of the base 10 and the lens 30, and the respective metal films may be joined by the joining member 60. By doing so, the space in the recess 13 can be sealed. By using the joining member 60 for joining the base 10 and the lens 30 and keeping the space in the recess 13 in an airtight state, deterioration of the light-emitting element 20 can be suppressed.

[0044] In the example shown in FIG. 6, the light L1b indicated by the arrow represents a part of the light emitted from the light-emitting element 20 that travels toward the center of the lens portion 31 in the lens 30. Each of the light L2b and the light L3b indicated by the arrow represents a part of the light emitted from the light-emitting element 20 that passes through the joining member 60 disposed between the lower surface 35 of the lens 30 and the upper surface 12 of the base 10 and travels toward the side surface 321 of the flange portion 32 in the lens 30. The light L21b represents the light obtained by reflecting the light L2b by the reflecting member 40. The light L31b represents the light obtained by reflecting the light L3b by the reflecting member 40. In the light-emitting device 1 according to the third embodiment, the reflecting member 40 is disposed in contact with the side surface 61 of the joining member 60. Thereby, among the light from the light-emitting element 20, light such as the light L2b and the light L3b that travels toward the side surface 321 of the flange portion 32 in the lens 30 is reflected by the reflecting member 40, making it possible to extract the light from the light-emitting device 1. As a result, the light extraction efficiency of the light-emitting device 1 can be increased.

[0045] [Fourth Embodiment] With reference to FIG. 7, the configuration of the light-emitting device according to the fourth embodiment will be described. FIG. 7 is a schematic top view showing an example of the light-emitting device 1 according to the fourth embodiment.

[0046] As shown in FIG. 7, the main difference between the first embodiment and the light-emitting device 1 according to the fourth embodiment is that in a top view, the outer edge shape of the reflecting member 40 is an irregular curved shape.

[0047] In the top view, since the outer edge shape of the reflecting member 40 is an irregular curved shape, the reflecting member 40 can be easily provided in contact with the upper surface 12 and the side surface 321 of the flange portion 32. Thereby, the manufacturing of the light-emitting device 1 can be facilitated.

[0048] As described above, the preferred embodiments have been described in detail. However, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope described in the claims.

[0049] The ordinal numbers, quantities, and other numbers used in the description of the embodiments are all exemplified for specifically explaining the technology of the present disclosure, and the present disclosure is not limited to the exemplified numbers. In addition, the connection relationship between the components is exemplified for specifically explaining the technology of the present disclosure, and the connection relationship for realizing the functions of the present disclosure is not limited thereto.

[0050] Since the light-emitting device of the present disclosure can improve the light extraction efficiency, it can be suitably used in applications such as printing and exposure in which an object is irradiated with ultraviolet light in order to cure the object. However, the light-emitting device of the present disclosure is not limited to these applications.

[0051] Aspects of the present disclosure are, for example, as follows. <Item 1> A light-emitting device having a substrate including an outer surface, an upper surface intersecting the outer surface, and a recess provided on the upper surface side, a light-emitting element disposed in the recess, a lens disposed on the upper surface and including a lens portion and a flange portion, and a reflecting member disposed in contact with the upper surface and the side surface of the flange portion. <Item 2> The light-emitting device according to <Item 1>, further comprising a light-transmissive member disposed between the lens and the light-emitting element, wherein the reflecting member is disposed in contact with side surfaces of the flange portion of the lens and the light-transmissive member, respectively. <Item 3> The light-emitting device according to <Item 1> or <Item 2>, wherein the reflecting member surrounds the flange portion in a top view. <Item 4> The lens is a light-emitting device according to any one of <Item 1> to <Item 3>, which is smaller than the base body in a top view. <Item 5> The flange portion is a light-emitting device according to any one of <Item 1> to <Item 4>, which has a rectangular shape including a curved surface at a corner portion in a top view. <Item 6> The light-emitting device further includes a joining member for joining the lens to the upper surface, and the reflecting member is in contact with the joining member, and is a light-emitting device according to any one of <Item 1> to <Item 5>. <Item 7> In a top view, the light-emitting device further includes a joining member provided at a portion other than the corner portion of the flange portion for joining the lens to the upper surface. The concave portion has a rectangular shape including a curved surface at a corner portion in a top view. In a top view, the width of the portion where the lens and the upper surface of the base body overlap is smaller at the corner portion than the portion where the joining member is disposed, and is a light-emitting device according to <Item 5>. <Item 8> In a top view, the width of the reflecting member on the diagonal line of the base body is larger than the width of the reflecting member on the perpendicular bisector of the side of the base body, and is a light-emitting device according to <Item 7>. <Item 9> In a top view, the outer edge shape of the reflecting member is an irregular curved shape, and is a light-emitting device according to any one of <Item 1> to <Item 8>.

Explanation of Reference Numerals

[0052] 1 Light-emitting device 10 Base body 11 Outer surface 12 Upper surface 13 Concave portion 14 Bottom surface 15 Side wall portion 151 Inner surface 17 Corner portion of the concave portion 18 Curved surface of the concave portion 191 Diagonal line 192 Perpendicular bisector 20 Light-emitting element 30 Lens 31 Lens portion 32 Flange portion 321 Side surface of the flange portion Upper surface of the flange portion 322 Lower surface of the flange portion 323 Corner portion of the flange portion 33 Curved surface of the flange portion 34 Lower surface of the lens 35 Reflective member 40 Light-transmissive member 50 Side surface of the light-transmissive member 51 Lower surface of the light-transmissive member 52 First region 521 Second region 522 Joining member 60 Side surface of the joining member 61 Optical axis of the lens C Width of the reflective member on the diagonal of the substrate d1 Width of the reflective member on the perpendicular bisector of the side of the substrate d2 L1, L2, L21, L3, L31 Light L1a, L2a, L21a, L3a, L31a Light L1b, L2b, L21b, L3b, L31b Light Width W1 of the overlapping portion of the lens and the upper surface of the substrate where the joining member is arranged Width W2 of the overlapping portion of the lens and the upper surface of the substrate at the corner portion

Claims

1. A substrate including an outer surface, an upper surface intersecting the outer surface, and a recess provided on the upper surface side; A light-emitting element disposed in the recess; A lens disposed on the upper surface and including a lens portion and a flange portion; A light-emitting device having a reflective member disposed in contact with the upper surface and the side surface of the flange portion.

2. Having a light-transmissive member disposed between the lens and the light-emitting element, The light-emitting device according to claim 1, wherein the reflective member is disposed in contact with side surfaces of the flange portion of the lens and the light-transmissive member, respectively.

3. The light-emitting device according to claim 1 or claim 2, wherein the reflective member surrounds the flange portion in a top view.

4. The light-emitting device according to claim 1 or claim 2, wherein the lens is smaller than the substrate in a top view.

5. The light-emitting device according to claim 1 or claim 2, wherein the flange portion has a rectangular shape including a curved surface at a corner in a top view.

6. Further having a joining member for joining the lens to the upper surface, The light-emitting device according to claim 1, wherein the reflective member is in contact with the joining member.

7. The light-emitting device according to claim 5, wherein a width of the reflective member on a diagonal line of the substrate in a top view is larger than a width of the reflective member on a perpendicular bisector of a side of the substrate.

8. Further having a joining member for joining the lens to the upper surface, The recess has a rectangular shape including a curved surface at a corner in a top view, The light-emitting device according to claim 5, wherein a width of a portion where the lens and the upper surface of the substrate overlap in a top view is smaller at the corner than a portion where the joining member is disposed.

9. The light-emitting device according to claim 1, wherein an outer edge shape of the reflective member is an irregular curved shape in a top view.

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