A light emitting device

Abstract

The application discloses a light-emitting device, comprising: a substrate, a first surface of the substrate is provided with a plurality of semispherical grooves, and a first self-locking structure is arranged in each semispherical groove; a light-emitting structure is correspondingly arranged in each semispherical groove, the light-emitting structure is provided with a semispherical protrusion adjacent to the surface of the substrate, the semispherical protrusion is embedded in the semispherical groove, and a second self-locking structure is arranged on the surface of the semispherical protrusion; and the first self-locking structure and the second self-locking structure are matched to lock the light-emitting structure in the semispherical groove. The embodiment of the application can improve the bonding stability and reliability between the light-emitting structure and the substrate after transfer.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a light-emitting device. Background Technology

[0002] MLED (Mini / Micro Light Emitting Diode) is a type of light-emitting diode with a size on the micrometer scale. Due to its small size, Micro LED can be used as pixels on a light-emitting panel, and a light-emitting panel made using Micro LED is called a Micro LED light-emitting panel. Compared with Organic Light-Emitting Diode (OLED) light-emitting panels, Micro LED light-emitting panels have better lifespan and viewing angles. Therefore, Micro LED display technology has become a key research focus in the field of display technology.

[0003] After micro LEDs are fabricated, they need to be transferred to a TFT backplane before they can be driven to emit light. However, in existing light-emitting devices, the bond between the transferred micro LEDs and the TFT backplane is not strong, and there is a risk of them detaching. Summary of the Invention

[0004] This invention provides a light-emitting device to improve the bonding stability and reliability between the transferred light-emitting structure and the substrate.

[0005] According to one aspect of the present invention, a light-emitting device is provided, comprising:

[0006] A substrate, wherein a plurality of hemispherical grooves are provided on the first surface of the substrate, and a first self-locking structure is provided in the hemispherical grooves;

[0007] Each of the hemispherical grooves is provided with a corresponding light-emitting structure. The surface of the light-emitting structure adjacent to the substrate has a hemispherical protrusion. The hemispherical protrusion is embedded in the hemispherical groove. The surface of the hemispherical protrusion is provided with a second self-locking structure.

[0008] The first self-locking structure and the second self-locking structure cooperate to lock the light-emitting structure within the hemispherical groove.

[0009] Optionally, the first self-locking structure includes at least one first columnar protrusion, and the second self-locking structure includes a plurality of first fixing grooves; or,

[0010] The second self-locking structure includes at least one second columnar protrusion, and the first self-locking structure includes a plurality of second fixing grooves.

[0011] Optionally, when the first self-locking structure includes at least one first columnar protrusion, the surface of the first columnar protrusion has a first spike structure protruding outward from the substrate direction;

[0012] When the second self-locking structure includes at least one second columnar protrusion, the surface of the second columnar protrusion has a second spike structure that protrudes outward from the direction of the light-emitting structure.

[0013] Optionally, when the first self-locking structure includes at least one first columnar protrusion, the first columnar protrusion includes a first main body and a first tip, the first main body is disposed on the side of the first tip adjacent to the hemispherical groove; the first tip is conical, the bottom surface of the cone is connected to the top surface of the first main body, and the bottom area of ​​the cone is larger than the area of ​​the top surface of the main body.

[0014] When the second self-locking structure includes at least one second columnar protrusion, the second columnar protrusion includes a second main body and a second tip. The second main body is disposed on the side of the second tip adjacent to the hemispherical protrusion. The second tip is conical, with the bottom surface of the cone connected to the top surface of the second main body, and the bottom area of ​​the cone is larger than the area of ​​the top surface of the second main body.

[0015] Optionally, when the second self-locking structure includes a first fixing groove, the area of ​​the inlet of the first fixing groove is smaller than the area of ​​the bottom surface;

[0016] When the first self-locking structure includes a second fixing groove, the area of ​​the inlet of the second fixing groove is smaller than the area of ​​the bottom surface.

[0017] Optionally, when the first self-locking structure includes at least one first columnar protrusion, the height of the first columnar protrusion is less than or equal to the depth of the first fixing groove.

[0018] When the second self-locking structure includes at least one second columnar protrusion, the height of the second columnar protrusion is less than or equal to the depth of the second fixing groove.

[0019] Optionally, the first self-locking structure includes a first latching structure, and the second self-locking structure includes a second latching structure;

[0020] The first and second snap-fit ​​structures engage to lock the light-emitting structure within the hemispherical groove.

[0021] Optionally, the surface of the hemispherical protrusion has a first conductive structure and a second conductive structure that are mutually insulated from each other;

[0022] The light-emitting structure includes a first electrode and a second electrode, wherein the first conductive structure is electrically connected to the first electrode and the second conductive structure is electrically connected to the second electrode;

[0023] The surface of the hemispherical groove has a third conductive structure corresponding to the first conductive structure and a fourth conductive structure corresponding to the second conductive structure; when the hemispherical protrusion is embedded in the hemispherical groove, the first conductive structure contacts the third conductive structure, and the second conductive structure contacts the fourth conductive structure.

[0024] The third conductive structure and the fourth conductive structure are used to transmit driving signals to the light-emitting structure.

[0025] Optionally, the surface of the hemispherical protrusion has a fifth conductive structure, and the surface or interior of the first self-locking structure is provided with a sixth conductive structure.

[0026] The light-emitting structure includes a first electrode and a second electrode, the fifth conductive structure is electrically connected to the first electrode, and the sixth conductive structure is electrically connected to the second electrode;

[0027] The surface of the hemispherical groove has a seventh conductive structure corresponding to the fifth conductive structure; the surface or interior of the second self-locking structure has an eighth conductive structure corresponding to the sixth conductive structure; when the hemispherical protrusion is embedded in the hemispherical groove, the fifth conductive structure is in contact with the seventh conductive structure, and the sixth conductive structure is in contact with the eighth conductive structure.

[0028] The seventh conductive structure and the eighth conductive structure are used to transmit driving signals to the light-emitting structure.

[0029] Optionally, the surface of the second electrode adjacent to the substrate is hemispherical, and the second electrode is the hemispherical protrusion; or, an insulating layer is provided on the side of the second electrode adjacent to the substrate, the surface of the insulating layer adjacent to the substrate is hemispherical, and the insulating layer is the hemispherical protrusion.

[0030] In the light-emitting device provided in this embodiment of the invention, a plurality of hemispherical grooves are provided on the first surface of the substrate, and a first self-locking structure is provided in each hemispherical groove. A light-emitting structure is correspondingly provided in each hemispherical groove. The surface of the light-emitting structure adjacent to the substrate has a hemispherical protrusion, and a second self-locking structure is provided on the surface of the hemispherical protrusion. The first self-locking structure and the second self-locking structure cooperate to lock the light-emitting structure in the hemispherical groove. The hemispherical groove has a locking function for the hemispherical protrusion, which can finely adjust the position of the light-emitting structure, so that the light-emitting structure can be accurately transferred to its corresponding hemispherical groove. Furthermore, the first self-locking structure and the second self-locking structure can lock the position of the light-emitting structure, so that the light-emitting structure is stably fixed on the substrate, thereby improving the bonding stability and reliability between the light-emitting structure and the substrate after transfer.

[0031] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of a light-emitting device provided in an embodiment of the present invention;

[0034] Figure 2 This is a schematic diagram of a light-emitting device provided in an embodiment of the present invention;

[0035] Figure 3 This is a schematic diagram of a substrate provided in an embodiment of the present invention;

[0036] Figure 4 This is a schematic diagram of a light-emitting structure provided in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of another substrate provided in an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of another light-emitting structure provided in an embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of another light-emitting structure provided in an embodiment of the present invention;

[0040] Figure 8 This is a schematic diagram of another substrate provided in an embodiment of the present invention;

[0041] Figure 9 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0042] Figure 10 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0043] Figure 11 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention;

[0044] Figure 12 This is a schematic diagram of another light-emitting structure provided in an embodiment of the present invention;

[0045] Figure 13 This is a schematic diagram of another light-emitting structure provided in an embodiment of the present invention. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0048] This invention provides a light-emitting device. Figure 1 This is a schematic diagram of a light-emitting device provided in an embodiment of the present invention, for reference. Figure 1 The light-emitting device includes:

[0049] The substrate 10 has a plurality of hemispherical grooves 11 on its first surface, and a first self-locking structure 12 is provided in the hemispherical grooves 11.

[0050] Each hemispherical groove 11 is provided with a corresponding light-emitting structure 20. The surface of the light-emitting structure 20 adjacent to the substrate 10 has a hemispherical protrusion 21. The hemispherical groove 11 is embedded in the hemispherical protrusion 21. A second self-locking structure 22 is provided on the surface of the hemispherical protrusion 21.

[0051] The first self-locking structure 12 and the second self-locking structure 22 work together to lock the light-emitting structure 20 in the hemispherical groove 11.

[0052] The substrate 10 can be a TFT backplane, and may include a substrate, a driving circuit, and an insulating layer covering the driving circuit. A hemispherical groove 11 can be disposed on the surface of the insulating layer. The hemispherical groove 11 can be configured according to the size of the light-emitting structure 20. The hemispherical groove 11 can be hemispherical or a structure similar to a hemispherical shape. The light-emitting structure 20 may include a Mini LED (Light Emitting Diode) or a Micro LED. The light-emitting structure 20 may include two semiconductor layers and a light-emitting layer disposed between the two semiconductor layers. The light-emitting structure 20 may also include a first electrode and a second electrode. The surface of the second electrode adjacent to the substrate 10 can be configured as hemispherical, forming a hemispherical protrusion 21. Alternatively, the surface of the light-emitting structure 20 adjacent to the substrate 10 can be an insulating layer, and the surface of the insulating layer adjacent to the substrate 10 can be configured as hemispherical, forming the hemispherical protrusion 21.

[0053] Specifically, the first self-locking structure 12 and the second self-locking structure 22 can be a snap-fit ​​structure or other structures that cooperate to lock the position; this embodiment does not impose specific limitations. The size of the hemispherical groove 11 can be the same as the size of the hemispherical protrusion 21, or it can be slightly larger than the size of the hemispherical protrusion 21. When the Micro LED is transferred to the surface of the substrate 10, since the surface of the substrate 10 has the hemispherical groove 11 and the surface of the light-emitting structure 20 adjacent to the substrate 10 has the hemispherical protrusion 21, when the Micro LED falls from the transfer substrate onto the surface of the substrate 10, the hemispherical groove 11 has a locking effect on the hemispherical protrusion 21, which can finely adjust the position of the light-emitting structure 20, so that the light-emitting structure 20 can be accurately transferred to its corresponding position. Furthermore, the first self-locking structure 12 and the second self-locking structure 22 can lock the position of the light-emitting structure 20, so that the light-emitting structure 20 is stably fixed on the substrate 10, improving the bonding stability and reliability between the light-emitting structure 20 and the substrate 10 after transfer.

[0054] In the light-emitting device provided in this embodiment of the invention, a plurality of hemispherical grooves 11 are provided on the first surface of the substrate 10. A first self-locking structure 12 is provided in each hemispherical groove 11. A light-emitting structure 20 is correspondingly provided in each hemispherical groove 11. The surface of the light-emitting structure 20 adjacent to the substrate 10 has a hemispherical protrusion 21. A second self-locking structure 22 is provided on the surface of the hemispherical protrusion 21. The first self-locking structure 12 and the second self-locking structure 22 cooperate to lock the light-emitting structure 20 in the hemispherical groove 11. The hemispherical groove 11 has a locking function for the hemispherical protrusion 21, which can finely adjust the position of the light-emitting structure 20, so that the light-emitting structure 20 can be accurately transferred to its corresponding hemispherical groove 11. Furthermore, the first self-locking structure 12 and the second self-locking structure 22 can lock the position of the light-emitting structure 20, so that the light-emitting structure 20 is stably fixed on the substrate 10, thereby improving the bonding stability and reliability between the light-emitting structure 20 and the substrate 10 after transfer.

[0055] Figure 2 This is a schematic diagram of a light-emitting device provided in an embodiment of the present invention. Optional, see reference. Figure 1 and Figure 2 The first self-locking structure 12 includes at least one first columnar protrusion, and the second self-locking structure 22 includes a plurality of first fixing grooves. Figure 1 );or,

[0056] The second self-locking structure 22 includes at least one second columnar protrusion, and the first self-locking structure 12 includes a plurality of second fixing grooves. Figure 2 ).

[0057] For details, please refer to Figure 1 The first self-locking structure 12 may include one, two or more first columnar protrusions. The first fixing groove may have the same shape as or different from the shape of the first columnar protrusion. For example, the first fixing groove may be a columnar groove. The first fixing groove has a locking function for the first columnar protrusion. After the light-emitting structure 20 is disposed in the hemispherical groove 11, the first columnar protrusion enters a first fixing groove. The first fixing groove and the first columnar protrusion cooperate to lock the position of the light-emitting structure 20 and the substrate 10.

[0058] refer to Figure 2 The second self-locking structure may include one, two, or more second columnar protrusions. The second fixing groove may have the same shape as the second columnar protrusion; for example, the second fixing groove may be a columnar groove. The second fixing groove has a locking function for the second columnar protrusion. After the light-emitting structure 20 is disposed in the hemispherical groove 11, the second columnar protrusion enters a second fixing groove, and the second fixing groove and the second columnar protrusion cooperate to lock the positions of the light-emitting structure 20 and the substrate 10.

[0059] Optionally, the height of the first columnar protrusion is less than or equal to the depth of the first fixing groove, and the height of the second columnar protrusion is less than or equal to the depth of the second fixing groove, which can prevent the first columnar protrusion and the second columnar protrusion from damaging the light-emitting structure 20.

[0060] Figure 3 This is a schematic diagram of a substrate provided in an embodiment of the present invention. Optional, refer to... Figure 1 and Figure 3 When the first self-locking structure 12 includes at least one first columnar protrusion, the surface of the first columnar protrusion has a first spike structure 121 that protrudes outward from the substrate 10.

[0061] Specifically, one, two, or more first protrusion structures 121 can be provided on the surface of the first columnar protrusion. Since the first protrusion structure 121 protrudes outward from the substrate 10, the first protrusion structure 121 will not block the first columnar protrusion from entering the first fixing groove. After the first columnar protrusion enters the first fixing groove, the first protrusion structure 121 contacts the side wall of the first fixing groove. When the first columnar protrusion moves away from the first fixing groove, the first protrusion structure 121 hinders the movement of the first columnar protrusion, which can lock the position of the first columnar protrusion and the first fixing groove, so that the first self-locking structure 12 and the second self-locking structure 22 are better locked.

[0062] Figure 4 This is a schematic diagram of a light-emitting structure provided in an embodiment of the present invention. Optional, see reference. Figure 2 and Figure 4 When the second self-locking structure 22 includes at least one second columnar protrusion, the surface of the second columnar protrusion has a second spike structure 221 that protrudes outward from the direction of the light-emitting structure 20. Figure 4 ).

[0063] Specifically, one, two, or more second protrusion structures 221 can be provided on the surface of the second columnar protrusion. Since the second protrusion structure 221 protrudes outward from the direction of the light-emitting structure 20, the second protrusion structure 221 will not block the second columnar protrusion from entering the second fixing groove. After the second columnar protrusion enters the second fixing groove, the second protrusion structure 221 contacts the side wall of the second fixing groove. When the second columnar protrusion moves away from the second fixing groove, the second protrusion structure 221 hinders the movement of the second columnar protrusion, which can lock the position of the second columnar protrusion and the second fixing groove, so that the first self-locking structure 12 and the second self-locking structure 22 are better locked.

[0064] Figure 5 This is a schematic diagram of another substrate provided in an embodiment of the present invention. Optional, refer to... Figure 1 and Figure 5When the first self-locking structure 12 includes at least one first columnar protrusion, the first columnar protrusion includes a first main body portion 31 and a first tip portion 32. The first main body portion 31 is disposed on one side of the first tip portion 32 adjacent to the hemispherical groove 11. The first tip portion 32 is conical, and the bottom surface of the conical shape is connected to the top surface of the first main body portion 31, and the bottom area of ​​the conical shape is larger than the area of ​​the top surface of the first main body portion.

[0065] Specifically, the apex of the cone points to the first fixing groove, and the conical surface of the cone is an inclined plane. When the first columnar protrusion moves into the first fixing groove, the first tip 32 of the cone provides minimal resistance. After the first columnar protrusion enters the first fixing groove, the edge of the bottom surface of the first tip 32 contacts the first fixing groove, acting as a locking mechanism to prevent the first columnar protrusion from detaching from the first fixing groove. This locks the positions of the first columnar protrusion and the first fixing groove, allowing the first self-locking structure 12 and the second self-locking structure to lock together more effectively. Preferably, the material of the first tip 32 can be at least one of PDMS, PET, PEN, PC, PETG, PMMA, and acrylic.

[0066] Figure 6 This is a schematic diagram of another light-emitting structure provided in an embodiment of the present invention, for reference. Figure 2 and Figure 6 When the second self-locking structure 22 includes at least one second columnar protrusion, the second columnar protrusion includes a second main body portion 41 and a second tip portion 42. The second main body portion 41 is disposed on one side of the second tip portion 42 adjacent to the hemispherical protrusion 21. The second tip portion 42 is conical, and the bottom surface of the conical shape is connected to the top surface of the second main body portion 41, and the bottom area of ​​the conical shape is larger than the area of ​​the top surface of the second main body portion 41.

[0067] Specifically, the apex of the cone points to the first fixing groove, and the cone surface is an inclined plane. When the second columnar protrusion moves into the second fixing groove, the second tip 42 of the cone has a small obstruction effect. After the second columnar protrusion enters the second fixing groove, the edge of the bottom surface of the second tip 42 contacts the first fixing groove, which plays a locking role on the second columnar protrusion, preventing the second columnar protrusion from coming out of the second fixing groove. This can lock the position of the second columnar protrusion and the second fixing groove, so that the first self-locking structure 12 and the second self-locking structure 22 can be locked better.

[0068] Figure 7 This is a schematic diagram of another light-emitting structure provided in an embodiment of the present invention. Optional, see reference. Figure 1 and Figure 7 When the second self-locking structure 22 includes the first fixing groove, the area of ​​the inlet of the first fixing groove is smaller than the area of ​​the bottom surface. This configuration allows the first fixing groove to better lock and fix the first columnar protrusion.

[0069] Figure 8 This is a schematic diagram of another substrate provided in an embodiment of the present invention. Optional, refer to... Figure 2 and Figure 8 When the first self-locking structure 12 includes a second fixing groove, the area of ​​the inlet of the second fixing groove is smaller than the area of ​​the bottom surface. This configuration allows the second fixing groove to better lock and fix the second columnar protrusion.

[0070] Figure 9 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Optional, see reference. Figure 9 The first self-locking structure 12 includes a first snap-fit ​​structure 71, and the second self-locking structure 22 includes a second snap-fit ​​structure 72; the first snap-fit ​​structure 71 and the second snap-fit ​​structure 72 engage to lock the light-emitting structure 20 in the hemispherical groove 11.

[0071] Specifically, the first self-locking structure 12 and the second self-locking structure 22 can adopt any type of snap-fit ​​structure, as long as they can cooperate to lock the positions of the light-emitting structure 20 and the substrate 10. By setting the first self-locking structure 12 to include a first snap-fit ​​structure and the second self-locking structure 22 to include a second snap-fit ​​structure, the positions of the light-emitting structure 20 and the substrate 10 can be locked better, resulting in higher stability and reliability of the connection between the light-emitting structure 20 and the substrate 10.

[0072] Optional, see reference Figure 9 The first snap-fit ​​structure 71 includes a slot disposed on the side of the hemispherical groove 11; the second snap-fit ​​structure 72 includes a slot disposed on the side of the hemispherical protrusion 21.

[0073] The first snap-fit ​​structure 71 and the second snap-fit ​​structure 72 are set as slots, which makes the structure simpler and easier to manufacture.

[0074] Figure 10 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Optional, see reference. Figure 10 The surface of the hemispherical protrusion 21 has a first conductive structure 61 and a second conductive structure 62 that are mutually insulated.

[0075] The light-emitting structure 20 includes a first electrode and a second electrode, a first conductive structure 61 is electrically connected to the first electrode, and a second conductive structure 62 is electrically connected to the second electrode.

[0076] The surface of the hemispherical groove 11 has a third conductive structure 63 corresponding to the first conductive structure 61 and a fourth conductive structure 64 corresponding to the second conductive structure 62; when the hemispherical protrusion 21 is embedded in the hemispherical groove 11, the first conductive structure 61 contacts the third conductive structure 63, and the second conductive structure 62 contacts the fourth conductive structure 64.

[0077] The third conductive structure 63 and the fourth conductive structure 64 are used to transmit driving signals to the light-emitting structure 20.

[0078] Specifically, by setting a first conductive structure 61 and a second conductive structure 62 on the surface of the hemispherical protrusion 21, and setting a third conductive structure 63 and a fourth conductive structure 64 on the surface of the hemispherical groove 11, the transmission of driving signals can be achieved without setting wires or other structures. This improves the stability of the combination between the substrate 10 and the light-emitting structure 20 while reducing the structural complexity of the light-emitting device.

[0079] Figure 11 This is a schematic diagram of another light-emitting device provided in an embodiment of the present invention. Optional, see reference. Figure 11 The surface of the hemispherical protrusion 21 has a fifth conductive structure 65, and the surface or interior of the second self-locking structure 22 is provided with a sixth conductive structure 66.

[0080] The light-emitting structure 20 includes a first electrode and a second electrode, a fifth conductive structure 65 electrically connected to the first electrode, and a sixth conductive structure 66 electrically connected to the second electrode.

[0081] The surface of the hemispherical groove 11 has a seventh conductive structure 67 corresponding to the fifth conductive structure 65; the surface or interior of the first self-locking structure 12 has an eighth conductive structure 68 corresponding to the sixth conductive structure 66; when the hemispherical protrusion 21 is embedded in the hemispherical groove 11, the fifth conductive structure 65 is in contact with the seventh conductive structure 67, and the sixth conductive structure 66 is in contact with the eighth conductive structure 68.

[0082] The seventh conductive structure 67 and the eighth conductive structure 68 are used to transmit driving signals to the light-emitting structure.

[0083] Specifically, the sixth conductive structure 66, which transmits signals to the second electrode, can be disposed on the surface or inside the second self-locking structure 22, and the eighth conductive structure 68 can be disposed on the surface or inside the first self-locking structure 12. When the first self-locking structure 12 and the second self-locking structure 22 cooperate to self-lock, the sixth conductive structure 66 and the eighth conductive structure 68 are in contact with each other. For example, when the first self-locking structure 12 is a groove and the second self-locking structure 22 is a protrusion, the eighth conductive structure 68 can be disposed on the surface of the groove, and the sixth conductive structure 66 can be disposed inside the protrusion and partially exposed, or it can be disposed on the surface of the protrusion.

[0084] Figure 12 This is a schematic diagram of another light-emitting structure provided in an embodiment of the present invention. Figure 13 This is a schematic diagram of another light-emitting structure provided in an embodiment of the present invention, for reference. Figure 12 and Figure 13 The surface of the second electrode 205 adjacent to the substrate is hemispherical, and the second electrode 205 has a hemispherical protrusion 21. Figure 12Alternatively, an insulating layer 80 is provided on the side of the second electrode 205 adjacent to the substrate, the surface of the insulating layer 80 away from the second semiconductor layer 203 is hemispherical, and the insulating layer 80 has hemispherical protrusions. Figure 13 ).

[0085] Specifically, the light-emitting structure 20 may include a first semiconductor layer 201, a light-emitting layer 202, a second semiconductor layer 203, a first electrode 204, and a second electrode 205. By fabricating the second electrode 205 into a hemispherical shape, the bonding stability between the light-emitting structure 20 and the substrate can be improved without adding other structures. Since the insulating layer 80 is relatively easy to pattern, setting the insulating layer 80 into a hemispherical shape can reduce the fabrication difficulty of the light-emitting structure 20.

[0086] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0087] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A light-emitting device, characterized in that, include: A substrate, wherein a plurality of hemispherical grooves are provided on the first surface of the substrate, and a first self-locking structure is provided in the hemispherical grooves; Each of the hemispherical grooves is provided with a corresponding light-emitting structure. The surface of the light-emitting structure adjacent to the substrate has a hemispherical protrusion. The hemispherical protrusion is embedded in the hemispherical groove. The surface of the hemispherical protrusion is provided with a second self-locking structure. The first self-locking structure and the second self-locking structure cooperate to lock the light-emitting structure within the hemispherical groove; The light-emitting structure further includes a first electrode and a second electrode, wherein the surface of the second electrode adjacent to the substrate is hemispherical and the second electrode is a hemispherical protrusion; or, an insulating layer is provided on the side of the second electrode adjacent to the substrate, wherein the surface of the insulating layer adjacent to the substrate is hemispherical and the insulating layer is a hemispherical protrusion. The first self-locking structure includes at least one first columnar protrusion, and the second self-locking structure includes a plurality of first fixing grooves; or, The second self-locking structure includes at least one second columnar protrusion, and the first self-locking structure includes a plurality of second fixing grooves; When the second self-locking structure includes a first fixing groove, the area of ​​the inlet of the first fixing groove is smaller than the area of ​​the bottom surface; when the first self-locking structure includes a second fixing groove, the area of ​​the inlet of the second fixing groove is smaller than the area of ​​the bottom surface.

2. The light-emitting device according to claim 1, characterized in that: When the first self-locking structure includes at least one first columnar protrusion, the surface of the first columnar protrusion has a first spike structure that protrudes outward from the substrate direction; When the second self-locking structure includes at least one second columnar protrusion, the surface of the second columnar protrusion has a second spike structure that protrudes outward from the direction of the light-emitting structure.

3. The light-emitting device according to claim 1, characterized in that: When the first self-locking structure includes at least one first columnar protrusion, the first columnar protrusion includes a first main body and a first tip, the first main body is disposed on the side of the first tip adjacent to the hemispherical groove; the first tip is conical, the bottom surface of the cone is connected to the top surface of the first main body, and the bottom area of ​​the cone is larger than the area of ​​the top surface of the main body. When the second self-locking structure includes at least one second columnar protrusion, the second columnar protrusion includes a second main body and a second tip. The second main body is disposed on the side of the second tip adjacent to the hemispherical protrusion. The second tip is conical, with the bottom surface of the cone connected to the top surface of the second main body, and the bottom area of ​​the cone is larger than the area of ​​the top surface of the second main body.

4. The light-emitting device according to any one of claims 2-3, characterized in that: When the first self-locking structure includes at least one first columnar protrusion, the height of the first columnar protrusion is less than or equal to the depth of the first fixing groove; When the second self-locking structure includes at least one second columnar protrusion, the height of the second columnar protrusion is less than or equal to the depth of the second fixing groove.

5. The light-emitting device according to claim 1, characterized in that: The first self-locking structure includes a first latching structure, and the second self-locking structure includes a second latching structure; The first and second snap-fit ​​structures engage to lock the light-emitting structure within the hemispherical groove.

6. The light-emitting device according to claim 1, characterized in that: The surface of the hemispherical protrusion has a first conductive structure and a second conductive structure that are mutually insulated. The light-emitting structure includes a first electrode and a second electrode, wherein the first conductive structure is electrically connected to the first electrode and the second conductive structure is electrically connected to the second electrode; The surface of the hemispherical groove has a third conductive structure corresponding to the first conductive structure and a fourth conductive structure corresponding to the second conductive structure; when the hemispherical protrusion is embedded in the hemispherical groove, the first conductive structure contacts the third conductive structure, and the second conductive structure contacts the fourth conductive structure. The third conductive structure and the fourth conductive structure are used to transmit driving signals to the light-emitting structure.

7. The light-emitting device according to claim 1, characterized in that: The surface of the hemispherical protrusion has a fifth conductive structure, and the surface or interior of the first self-locking structure is provided with a sixth conductive structure. The fifth conductive structure is electrically connected to the first electrode, and the sixth conductive structure is electrically connected to the second electrode; The surface of the hemispherical groove has a seventh conductive structure corresponding to the fifth conductive structure; The second self-locking structure has an eighth conductive structure on its surface or inside that corresponds to the sixth conductive structure; When the hemispherical protrusion is embedded in the hemispherical groove, the fifth conductive structure contacts the seventh conductive structure, and the sixth conductive structure contacts the eighth conductive structure; The seventh conductive structure and the eighth conductive structure are used to transmit driving signals to the light-emitting structure.

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