Light-emitting assembly and light-emitting device

Abstract

The invention discloses a light-emitting assembly and a light-emitting device. The light-emitting assembly comprises a substrate, a plurality of light-emitting elements and at least one retaining wall element. The light-emitting element is arranged on the substrate; the retaining wall element is located between two adjacent light-emitting elements, wherein the retaining wall element is made of a photocuring colloid material. Therefore, the light-emitting assembly and the light-emitting device provided by the invention can improve the assembly efficiency and the use stability.

Description

Technical Field

[0001] The present invention relates to a light-emitting component and a light-emitting device, and particularly to a light-emitting component and a light-emitting device capable of shielding light. Background Art

[0002] With the development of 3C products, relevant manufacturers have developed many light-emitting devices, and directly disposed light-emitting elements, such as LED light-emitting components, on a substrate and used them as the light source of the screen in electronic products or some indicator signals. However, when different-color light-emitting elements are simultaneously disposed on a substrate, the light rays of different light-emitting elements will interfere with each other, affecting the displayed color or brightness performance. To solve this problem, relevant manufacturers have attached a partition element made of foam or soft material to the substrate to separate the light-emitting elements and shield the light rays to avoid light interference. However, the foam material is a soft material, so it may fall off due to insufficient force during pasting, or a large area may be occupied for stable pasting. Moreover, the foam material must be attached manually, and there may be problems such as misalignment during pasting, difficulty in assembly, and residual glue during rework, thereby affecting the assembly efficiency and the stability in use of the light-emitting device.

[0003] In view of this, a light-emitting component and a light-emitting device that can improve the assembly efficiency and the stability in use are still the common goals of relevant manufacturers at present. Summary of the Invention

[0004] According to an embodiment of the present invention, a light-emitting component is provided, which includes a substrate, a plurality of light-emitting elements, and at least one partition element. The light-emitting elements are disposed on the substrate. The at least one partition element is located between two adjacent light-emitting elements, wherein the at least one partition element is made of a light-curing colloid material.

[0005] According to an embodiment of the present invention, a light-emitting component is provided, which includes a substrate, a plurality of light-emitting elements, and at least one partition element. The light-emitting elements are disposed on the substrate, and each light-emitting element is used to emit a light ray to an incident surface. The at least one partition element is located between two adjacent light-emitting elements. Wherein, a partition height of the at least one partition element is h1, an incident height between the incident surface corresponding to each light-emitting element and the substrate is h2, a height of each light-emitting element is h3, an incident distance between the position where one side of each incident surface close to the at least one partition element is projected on the substrate and the center point of the corresponding light-emitting element is a, a first distance between an incident surface and the at least one partition element is b, and a second distance between the other incident surface and the at least one partition element is c, and the following conditions are satisfied: h1≥{[(h2 - h3)(a + b)] / (a + b + c)} + h3.

[0006] According to an embodiment of the present invention, a light-emitting device is provided, which includes a substrate, a structural member, a plurality of light-emitting elements, a plurality of light guide elements, and at least one barrier element. The structural member is located above the substrate and has a spacing distance from the substrate. The light-emitting elements are disposed between the substrate and the structural member. Each light guide element is disposed between each light-emitting element and the structural member, and each light guide element has an incident surface. The at least one barrier element is disposed on at least one of the substrate and the structural member, and the at least one barrier element is located between two adjacent light-emitting elements.

[0007] Thus, through the configuration of the barrier element, the light of the light-emitting elements can be effectively prevented from interfering with each other, and the problem of space utilization caused by attaching known foam materials can be avoided, thereby improving the assembly efficiency of the light-emitting module and the light-emitting device and the stability in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A side view schematic diagram of a light-emitting module according to a first embodiment of the present invention;

[0009] Figure 2 Illustrating Figure 1 A top view schematic diagram of the light-emitting module according to the first embodiment;

[0010] Figure 3 A schematic diagram of a light-emitting module according to a second embodiment of the present invention;

[0011] Figure 4 A cross-sectional schematic diagram of a light-emitting device according to a third embodiment of the present invention; and

[0012] Figure 5 A cross-sectional schematic diagram of a light-emitting device according to a fourth embodiment of the present invention.

[0013] MAIN COMPONENT SYMBOL DESCRIPTION:

[0014] 100, 200 Light-emitting modules

[0015] 110, 210, 310, 410 Substrates

[0016] 120, 220, 320, 420 Light-emitting elements

[0017] 131, 231, 331, 431 Barrier elements

[0018] 1311 Tops

[0019] 1312 Support parts

[0020] 140, 340, 440 Light guide elements

[0021] 141, 341 Incident surfaces

[0022] 230 Retaining wall structure

[0023] 240 Electronic component

[0024] 300, 400 Light-emitting device

[0025] 350, 450 Structural member

[0026] 351 Plate member

[0027] a Incident distance

[0028] b First distance

[0029] c Second distance

[0030] d Immersion depth

[0031] d1 Spacing

[0032] h Spacing distance

[0033] h1 Retaining wall height

[0034] h2 Incident height

[0035] h3 Height of the light-emitting element

[0036] p1 Center point

[0037] p2, p4 Reference projection points

[0038] p3 Center of the retaining wall element

[0039] w1 Half of the width of the retaining wall element

[0040] w2 Width of the plate member

[0041] x Half of the length of the retaining wall element

[0042] X1 Projection line

[0043] y Half of the length of the incident surface Detailed implementation manner

[0044] Please refer to Figure 1 , which shows a side view schematic diagram of a light-emitting module 100 according to the first embodiment of the present invention. As Figure 1 shown, the light-emitting module 100 includes a substrate 110, a plurality of light-emitting elements 120, and at least one retaining wall element 131( Figure 1 only two light-emitting elements 120 and one retaining wall element 131 are shown, but the present invention is not limited to the above-mentioned quantities). The light-emitting elements 120 are disposed on the substrate 110. The retaining wall element 131 is located between two adjacent light-emitting elements 120, and the retaining wall element 131 is made of a light-curing colloid material.

[0045] The light-blocking element 131 made of a photocurable colloidal material is irradiated and solidified between adjacent light-emitting elements 120 to prevent the light emitted by the light-emitting elements 120 from interfering with each other. In this way, it is possible to avoid the problem that the space available for other components on the substrate 110 is reduced due to the excessive adhesive area of the light-blocking element made of a known foam material. Thereby, the assembly efficiency of the light-emitting module 100 can be improved and the stability of the light-emitting module 100 in use can be improved. The structural details of the light-emitting module 100 will be described in detail below.

[0046] During the assembly process of the light-emitting module 100, the light-emitting elements 120 can be first disposed on the substrate 110, then the light-blocking element 131 made of a photocurable colloidal material can be disposed between adjacent light-emitting elements 120, and finally the light-blocking element 131 can be irradiated with light so that the light-blocking element 131 is cured by light irradiation and fixed on the substrate 110, but the present invention is not limited to the above method.

[0047] The photocurable colloidal material may include an acrylic resin base, and the photocurable colloidal material can be used to block the light emitted by the light-emitting elements 120. The photocurable colloidal material containing an acrylic resin base has the characteristics of compressibility, rapid curing, and no residual glue when torn off. Further, the photocurable colloidal material is an ultraviolet colloidal material made of an acrylic resin base. In other words, the photocurable colloidal material can be cured by light irradiation, and the low transmittance of the photocurable colloidal material itself can block light. Thus, during the assembly process of the light-emitting module 100, an automatic arm can be used to hold an injection device filled with the photocurable colloidal material, and the photocurable colloidal material can be adhered between adjacent light-emitting elements 120 by dotting, and then irradiated with light to be quickly cured and solidified to form a dark or opaque light-blocking element 131. Thereby, the light-blocking element 131 can be stably and quickly disposed between the light-emitting elements 120 to avoid the risk that the light-blocking element made of a known foam falls off due to insufficient force during adhesion, thereby improving the stability in use. Moreover, the low transmittance of the photocurable colloidal material can have sufficient light-shielding efficiency to prevent the light of adjacent light-emitting elements 120 from interfering with each other.

[0048] Please refer to Figure 2 , which shows a top view schematic diagram of the light-emitting module 100 according to Figure 1 the first embodiment. As shown in Figure 1 and Figure 2As shown, the retaining wall element 131 may include a support portion 1312 and a top portion 1311. The support portion 1312 extends in a direction perpendicular to the substrate 110, and the top portion 1311 is integrally provided on the support portion 1312. The shape of the top portion 1311 is a semi-cylindrical shape. Viewed from a side view perspective, the overall shape of the retaining wall element 131 may generally be in the shape of a round bell. In other embodiments, the shape of the support portion may be in the shape of a pyramid or other shapes, and the present invention does not limit the shape of the retaining wall element. Viewed from a top view perspective, the shape of the retaining wall element 131 may be a long strip. Thereby, the material used for the retaining wall element 131 can be reduced to lower the manufacturing cost.

[0049] As Figure 1 shown, each light-emitting element 120 is used to emit a light ray to an incident surface 141. Each incident surface 141 may be a surface of the light guide element 140 closest to the light-emitting element 120 provided on the light-emitting module 100, so that the light ray emitted by the light-emitting element 120 can be introduced into the corresponding light guide element 140, but the present invention is not limited thereto. When a retaining wall height of the retaining wall element 131 is h1, an incident height between the incident surface 141 corresponding to each light-emitting element 120 and the substrate 110 is h2, a height of each light-emitting element 120 is h3, a distance between a position where one side of each incident surface 141 close to the retaining wall element 131 projects onto the substrate 110 and a center point p1 of the corresponding light-emitting element 120 is an incident distance a, a first distance between an incident surface 141 and the retaining wall element 131 is b, and a second distance between another incident surface 141 and the retaining wall element 131 is c. As Figure 1 and Figure 2As shown in the figure, the positions where the respective incident surfaces 141 are projected onto the substrate 110 can define reference projection points p2 and p4. Since the incident surface 141 is a rectangle, a projection line X1 is formed on the substrate 110 on the side of the incident surface 141 closest to the light-blocking element 131. The center of the projection line X1 is the reference projection point p2, and the incident distance from the center point p1 is a. The first distance b between the aforementioned incident surface 141 and the light-blocking element 131 is the distance between the reference projection point p2 and the center p3 of the light-blocking element 131. The second distance c between the aforementioned other incident surface 141 and the light-blocking element 131 is the distance between the reference projection point p4 and the center p3 of the light-blocking element 131, which satisfies the following condition: h1 ≥ {[(h2 - h3)(a + b)] / (a + b + c)} + h3. Furthermore, when h1 > {[(h2 - h3)(a + b)] / (a + b + c)} + h3, the light-blocking effect can be further enhanced. In this way, when the light-emitting element 120 emits light, the light-blocking height h1 of the light-blocking element 131 can block the light of the adjacent light-emitting element 120 that does not enter the corresponding incident surface 141. The light that is not blocked by the light-blocking element 131 can only enter the outer edge of the adjacent light guide element 140, thereby preventing the light of the light-emitting element 120 from entering other adjacent incident surfaces 141, so as to avoid the possibility of interference between the lights of the light-emitting elements 120 and reduce the material cost of the light-blocking element 131. As Figure 2 As shown in the figure, when half of the length of each incident surface 141 is y and half of the length of the light-blocking element 131 is x, the following condition can be satisfied: x ≥ y(a + b) / (a + b + c). Furthermore, when x > y(a + b) / (a + b + c), the light-blocking effect can be further enhanced.

[0050] Viewed from a top-down perspective, the light radiating and diverging from the center point p1 of the light-emitting element 120 will be blocked by the light-blocking element 131 within the incident range formed by connecting the center point p1 to the end points of the light-blocking element 131, and thus cannot enter the adjacent light-emitting element 120, further avoiding interference between the lights of the light-emitting elements 120.

[0051] As Figure 2 As shown in the figure, the area of the incident surface 141 is larger than the area of the light-emitting element 120; that is to say, the area of the incident surface 141 is larger than the light-emitting surface area of the light-emitting element 120 that emits light, so that most of the light emitted by the light-emitting element 120 can directly enter the incident surface 141. In other embodiments, the area of the incident surface can be smaller than the light-emitting surface area of the light-emitting element. The area of the incident surface of the present invention can be changed according to actual needs and is not limited to the above manner.

[0052] In the first embodiment, there is a gap between the retaining wall element 131 and the light-emitting element 120 to prevent interference between the light-emitting elements 120. In other embodiments, the retaining wall element can abut against the light-emitting element, and with the configuration that the area of the incident surface is smaller than the light-emitting surface of the light-emitting element, the retaining wall element can block light and avoid interfering with the light entering the incident surface from the light-emitting surface of the light-emitting element. The retaining wall element of the present invention can be set according to requirements and is not limited to the above manner.

[0053] Please refer to Figure 3 , which shows a three-dimensional schematic diagram of a light-emitting module 200 according to the second embodiment of the present invention. In the second embodiment, the light-emitting module 200 includes a substrate 210, a plurality of light-emitting elements 220, a plurality of retaining wall elements 231, and a plurality of electronic components 240. The structures and configurations of the substrate 210, the light-emitting elements 220, and the retaining wall elements 231 are similar to those of the substrate 110, the light-emitting elements 120, and the retaining wall elements 131 in the first embodiment and will not be described in detail herein. The electronic components 240 are disposed on the substrate 210, and the electronic components 240 can be a control module for controlling the light emission of the light-emitting elements 220 or a module for performing other functions of the light-emitting module 200, and the present invention is not limited thereto. In particular, the light-emitting module 200 may further include a retaining wall structure 230. The retaining wall structure 230 is integrally formed on the substrate 210 and surrounds the light-emitting elements 220, wherein the retaining wall elements 231 are part of the retaining wall structure 230. Furthermore, the retaining wall elements 231 can be made of a colloidal material, which is different from the retaining wall elements 131 in the first embodiment made of a photo-curable colloidal material. In other words, the retaining wall elements of the present invention do not necessarily have to be made of a photo-curable colloidal material and are not limited to the above materials. When the retaining wall height of the retaining wall elements 231 meets the conditions in the first embodiment, the retaining wall structure 230 can surround the light-emitting elements 220 to form individual light-emitting spaces and prevent the light of the light-emitting elements 220 from entering adjacent light-emitting spaces, thereby reducing the possibility of light interference.

[0054] In other embodiments, the light-emitting module may further include at least one plate member, a part of the plate member is immersed in the retaining wall element, the number of the plate members can be multiple and corresponding to the number of the retaining wall elements. Further, due to the compressibility of the retaining wall element made of the colloidal material, inserting the plate member into the retaining wall element can further block the light emitted by the light-emitting element toward other adjacent incident surfaces. Furthermore, the plate member can be disposed on a pair of members corresponding to the substrate, so that the pair of members can further fix the distance between the pair of members and the substrate by immersing the plate member in the retaining wall element, but the present invention is not limited thereto.

[0055] Please refer to Figure 4, which shows a cross-sectional schematic view of a light-emitting device 300 according to the third embodiment of the present invention. The light-emitting device 300 includes a substrate 310, a structural member 350, a plurality of light-emitting elements 320, a plurality of light-guiding elements 340, and a barrier element 331. The structural member 350 is located above the substrate 310 and has a spacing distance from the substrate 310. The light-emitting elements 320 are disposed between the substrate 310 and the structural member 350. Each light-guiding element 340 is disposed between each light-emitting element 320 and the structural member 350, and each light-guiding element 340 has an incident surface 341. The barrier element 331 is disposed on at least one of the substrate 310 and the structural member 350, and the barrier element 331 is located between two adjacent light-emitting elements 320. It should be noted that in the third embodiment, the barrier height h1 of the barrier element 331 can meet the relevant conditions of the barrier height h1 of the barrier element 131 in the first embodiment, which will not be elaborated here.

[0056] In the third embodiment, the barrier element 331 is disposed on the substrate 310 and is made of a light-curing colloidal material. The structural member 350 may include at least one plate member 351 that extends from the structural member 350 toward the substrate 310, and a part of the plate member 351 is immersed in the barrier element 331. The plate member 351 may be an opaque plastic part or a metal part, and the present invention is not limited thereto. When the barrier height of each barrier element 331 is h1, half of the width of each barrier element 331 is w1, the width of the plate member 351 is w2, and the immersion depth of the part of the plate member 351 immersed in the barrier element 331 is d, the following condition can be satisfied: w2×d≤h1×w1(2 - 0.5π). When the plate member 351 is immersed in the barrier element 331, the barrier element 331 deforms in the lateral direction due to its compressible property, and the above condition can avoid the problem that the barrier element 331 covers the adjacent light-emitting element 320 due to extrusion, resulting in the light incident on the corresponding incident surface 341 of the light-emitting element 320 being blocked or even the light-emitting element 320 being damaged. Furthermore, when w2×d < h1×w1(2 - 0.5π) is satisfied, the possibility of the barrier element 331 affecting the light-emitting element 320 can be further reduced. Therefore, through the configuration of the plate member 351 and the barrier element 331, the light-emitting elements 320 are separated from each other, and light interference between different light-emitting elements 320 can be avoided while maintaining the normal light emission of the light-emitting elements 320. As Figure 4 shown, the shape of the barrier element 331 is hemispherical, the barrier height h1 is equal to half of the width w1 of the barrier element 331 and is equal to the radius of the barrier element 331. In other embodiments, the barrier height of the barrier element may not be equal to half of the width of the barrier element, and the present invention is not limited to the above shape of the barrier element.

[0057] Please refer to Figure 5, which shows a cross-sectional schematic diagram of a light-emitting device 400 according to a fourth embodiment of the present invention. As can be seen from Figure 5 It can be seen that the structures of the substrate 410, the structural member 450, the light-emitting element 420, the light guide element 440, and the barrier element 431 of the light-emitting device 400 in the fourth embodiment are similar to those of the substrate 310, the structural member 350, the light-emitting element 320, the light guide element 340, and the barrier element 331 in the third embodiment, and will not be described in detail here.

[0058] Particularly, the barrier element 431 is disposed on the structural member 450 (or any counterpart of the substrate 410, such as a cover), and a top end of the barrier element 431 is in contact with the substrate 410. Further, the barrier element 431 is made of a light-curing colloidal material and is compressibly in contact with the substrate 410. In other words, the barrier height of the barrier element 431 before contacting the substrate 410 is greater than the spacing distance h between the structural member 450 and the substrate 410, and the barrier element 431 compresses after contacting the substrate 410, thereby completely separating the spaces of two adjacent light-emitting elements 320 to effectively shield and avoid light interference with each other.

[0059] Furthermore, there may be a spacing d1 between the barrier element 431 and each light guide element 440. When the top end of the barrier element 431 contacts the substrate 410, the barrier element 431 is compressed by force and deforms in its side direction. The spacing d1 between the barrier element 431 and the light guide element 440 can prevent the barrier element 431 from touching the light guide element 440 due to deformation, resulting in the possibility of displacement or damage of the light guide element 440.

[0060] The light-emitting device 400 may further include a barrier structure (not shown in the figure). The barrier structure is integrally formed on the structural member 450 and surrounds the light-emitting element 420, and the barrier element 431 is part of the barrier structure. In the fourth embodiment, the barrier structure may surround the light-emitting element 420 like the barrier structure 230 in the second embodiment. The difference is that the barrier structure 230 in the second embodiment is formed on the substrate 210; in the fourth embodiment, the barrier structure including the barrier element 431 is formed on the structural member 450. Thus, when the structural member 450 is not covered on the substrate 410, the barrier structure can be first formed on the structural member 450 by dispensing to serve as a grid space for accommodating the light-emitting element 420. And, after the light-emitting element 420 and the light guide element 440 are assembled on the substrate 410, the structural member 450 is then installed on the substrate 410, and the barrier structure surrounds the light-emitting element 420 and the light guide element 440 to avoid light interference with each other.

[0061] As can be seen from the above embodiments, the light-emitting component and the light-emitting device provided by the present invention have the following advantages: First, the efficiency of assembling the light-emitting component can be improved by the baffle element made of the photocurable colloidal material. Second, by satisfying specific conditions for the height of the baffle and the length of the baffle element, the light can be effectively blocked and the material cost can be reduced. Third, through the configuration of the plate member, the light interference between the light-emitting elements can be effectively avoided.

[0062] Although the present invention has been disclosed as above in the embodiments, it is not intended to limit the present invention. Any person skilled in the art should be able to make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be defined by the scope of the appended claims.

Claims

1. A light-emitting component, the light-emitting component comprising: A substrate; A plurality of light-emitting elements disposed on the substrate; And At least one barrier element located between two adjacent ones of the light-emitting elements, wherein the at least one barrier element is made of a photocurable colloidal material.

2. The light-emitting component according to claim 1, wherein the photocurable colloid material comprises an acrylic resin substrate.

3. The light-emitting component according to claim 1, wherein the photocurable colloid material is used to block a light ray emitted by each of the light-emitting elements.

4. The light-emitting component according to claim 1, wherein, A barrier height of the at least one barrier element is h1, each of the light-emitting elements emits a light ray to an incident surface, an incident height between the incident surface corresponding to each of the light-emitting elements and the substrate is h2, a height of each of the light-emitting elements is h3, a position of one side of each of the incident surfaces close to the at least one barrier element projected on the substrate and a center point of the corresponding light-emitting element thereof has an incident distance a, a first distance between one of the incident surfaces and the at least one barrier element is b, and a second distance between the other incident surface and the at least one barrier element is c, which satisfy the following conditions: h1≥{[(h2 - h3)(a + b)] / (a + b + c)} + h3.

5. The light-emitting component according to claim 4, wherein half of the length of each incident surface is y, and half of the length of the at least one retaining wall element is x, which satisfies the following condition: x≥y(a + b) / (a + b + c).

6. The light-emitting component according to claim 1, the light-emitting component further comprising: A barrier structure integrally formed on the substrate and surrounding the light-emitting elements, wherein the at least one barrier element is part of the barrier structure.

7. The light-emitting component according to claim 1, the light-emitting component further comprising: At least one plate member, a part of the at least one plate member is immersed in the at least one barrier element.

8. The light-emitting component according to claim 7, wherein a retaining wall height of the at least one retaining wall element is h1, half of the width of the at least one retaining wall element is w1, the width of the at least one plate member is w2, and an immersion depth of a part of the at least one plate member immersed in the at least one retaining wall element is d, which satisfies the following condition: w2×d≤h1×w1(2 - 0.5π).

9. A light-emitting component, the light-emitting component comprising: A substrate; A plurality of light-emitting elements disposed on the substrate, wherein each of the light-emitting elements emits a light ray to an incident surface; And At least one barrier element located between two adjacent ones of the light-emitting elements; Wherein, a barrier height of the at least one barrier element is h1, an incident height between the incident surface corresponding to each of the light-emitting elements and the substrate is h2, a height of each of the light-emitting elements is h3, a position of one side of each of the incident surfaces close to the at least one barrier element projected on the substrate and a center point of the corresponding light-emitting element thereof has an incident distance a, a first distance between one of the incident surfaces and the at least one barrier element is b, and a second distance between the other incident surface and the at least one barrier element is c, which satisfy the following conditions: h1≥{[(h2 - h3)(a + b)] / (a + b + c)} + h3.

10. The light-emitting component according to claim 9, wherein the at least one retaining wall element comprises a support portion and a top portion, the support portion extends in a direction perpendicular to the substrate, the top portion is integrally provided on the support portion, and the shape of the top portion is a semi-cylindrical body.

11. The light-emitting component according to claim 9, wherein the at least one retaining wall element is made of a colloid material.

12. A light-emitting device, the light-emitting device comprising: A substrate; A structural member located above the substrate and having a spacing distance from the substrate; A plurality of light-emitting elements disposed between the substrate and the structural member; A plurality of light guide elements, each of the light guide elements is disposed between each of the light-emitting elements and the structural member, and each of the light guide elements has an incident surface; and At least one barrier element disposed on at least one of the substrate and the structural member, wherein the at least one barrier element is located between two adjacent ones of the light-emitting elements.

13. The light-emitting device according to claim 12, wherein the at least one retaining wall element is disposed on the structural member, and a top end of the at least one retaining wall element contacts the substrate.

14. The light-emitting device according to claim 13, the light-emitting device further comprising: A barrier structure integrally formed on the structural member and surrounding the light-emitting elements, wherein the at least one barrier element is part of the barrier structure.

15. The light-emitting device according to claim 13, wherein there is a gap between the at least one retaining wall element and each of the light guiding elements.

16. The light-emitting device according to claim 13, wherein the at least one retaining wall element is made of a light-curing colloidal material.

17. The light-emitting device according to claim 16, wherein the at least one retaining wall element is compressibly in contact with the substrate.

18. The light-emitting device according to claim 12, wherein the at least one retaining wall element is disposed on the substrate, and the at least one retaining wall element is made of a light-curing colloidal material.

19. The light-emitting device according to claim 18, wherein the structural member includes at least one plate member, the at least one plate member extends from the structural member toward the substrate, and a part of the at least one plate member is immersed in the at least one retaining wall element.

20. The light-emitting device according to claim 19, wherein a retaining wall height of the at least one retaining wall element is h1, half of a width of the at least one retaining wall element is w1, a width of the at least one plate member is w2, and an immersion depth of a part of the at least one plate member immersed in the at least one retaining wall element is d, which satisfies the following condition: w2×d≤h1×w1(2 - 0.5π).

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