Display device

Abstract

The invention discloses a display device which comprises a driving back plate and a light-emitting element, the light-emitting element comprises an electrode, and the driving back plate comprises a base layer, a bonding pad, a clamping piece and a second elastic piece; the bonding pad is located on one side of the base layer, and an accommodating groove for accommodating at least part of the electrodes is formed in the bonding pad; the clamping piece is connected with the side wall of the containing groove through a first elastic piece. The second elastic piece is arranged in the containing groove, and the telescopic direction of the second elastic piece intersects with the telescopic direction of the first elastic piece. In the natural state of being not stressed, the second elastic piece abuts against the clamping piece, so that the first elastic piece is in a compressed state. And when the light-emitting element applies the acting force towards the base layer, the second elastic piece shrinks and is separated from the clamping piece, so that the first elastic piece releases the elastic potential energy, and the clamping piece is clamped with the electrode of the light-emitting element. According to the scheme, the reliability of connection between the light-emitting element and the driving backboard can be improved, and the preparation cost is reduced.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display device. Background Technology

[0002] Micro-LEDs (Micro Light Emitting Diodes) have advantages such as high brightness, high luminous efficiency, and low power consumption, and have broad application prospects in the display industry. In the fabrication process of Micro-LEDs, mass transfer technology is required to transfer LEDs located on a temporary substrate to a driving backplane.

[0003] However, the stability of existing mass transfer technologies and the reliability of Micro-LED display devices need to be improved. Summary of the Invention

[0004] The main technical problem addressed by this application is to provide a display device that improves the reliability of the connection between the light-emitting element and the driving backplane, and reduces the manufacturing cost.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: providing a display device, including a driving backplate and a light-emitting element, wherein the driving backplate includes a base layer, a pad, a snap-fit ​​member, and a second elastic member; the pad is located on one side of the base layer, and the pad is provided with a receiving groove for accommodating at least a portion of the electrodes; the snap-fit ​​member is connected to the side wall of the receiving groove through a first elastic member; the second elastic member is disposed in the receiving groove and its extension and contraction direction intersects with the extension and contraction direction of the first elastic member; wherein, in its natural state without force, the second elastic member abuts against the snap-fit ​​member, so that the first elastic member is in a compressed state; and when subjected to a force applied by the light-emitting element toward the base layer, the second elastic member contracts and separates from the snap-fit ​​member, thereby releasing the elastic potential energy of the first elastic member, so that the snap-fit ​​member snaps onto the electrodes of the light-emitting element.

[0006] Preferably, the second elastic member includes a sub-elastic member and a blocking member connected to the sub-elastic member. The sub-elastic member and the blocking member are arranged sequentially in a direction away from the base layer. The extension and contraction direction of the sub-elastic member intersects with the extension and contraction direction of the first elastic member. In the natural state where the second elastic member is not under force, the blocking member abuts against the snap-fit ​​member. When the second elastic member is subjected to a force applied by the light-emitting element toward the base layer, the sub-elastic member contracts, causing the blocking member to separate from the snap-fit ​​member.

[0007] Preferably, the first elastic element includes a spring, and / or the sub-elastic element includes a spring.

[0008] Preferably, the materials of the snap-fit ​​member and the first elastic member both include conductive materials, and / or the materials of the sub-elastic member and the blocking member both include conductive materials.

[0009] Preferably, the receiving groove includes a first sub-groove and a second sub-groove that are connected. In the direction away from the base layer, the first sub-groove and the second sub-groove are arranged sequentially, and the orthographic projection of the second sub-groove on the base layer covers the orthographic projection of the first sub-groove on the base layer.

[0010] The snap-fit ​​member is connected to the side wall of the second sub-groove via the first elastic member. At least a portion of the sub-elastic member is disposed within the first sub-groove. When the second elastic member is in its natural, unforced state, at least a portion of the blocking member is located within the second sub-groove and abuts against the snap-fit ​​member.

[0011] Preferably, the pad includes a second film layer and a first film layer disposed sequentially in a direction away from the substrate, wherein the second sub-groove penetrates the first film layer, and the first sub-groove is disposed at least in the second film layer.

[0012] Preferably, the pad further includes a third film layer located on the side of the second film layer opposite to the first film layer, and the first sub-groove penetrates the second film layer and extends into the third film layer.

[0013] Preferably, the materials of the first film layer and the third film layer both include titanium, and the material of the second film layer includes aluminum.

[0014] Preferably, the snap-fit ​​component includes a first snap-fit ​​surface that is opposite to the first elastic element and is used to snap the electrode, wherein, in the direction of the base layer pointing towards the pad, the first snap-fit ​​surface is an inclined surface that gradually moves away from the first elastic element.

[0015] Preferably, the first snap-fit ​​surface is a concave surface.

[0016] Preferably, the number of the snap-fit ​​components is at least two, the at least two snap-fit ​​components are arranged opposite to each other, and each snap-fit ​​component is connected to the side wall of the receiving groove through the first elastic member.

[0017] Preferably, the number of the second elastic element is at least two.

[0018] Preferably, the light-emitting element further includes an epitaxial layer, the electrode is connected to one side of the epitaxial layer, and the electrode is provided with a snap-fit ​​portion, which snaps into the snap-fit ​​component.

[0019] Preferably, the latching portion is located on the sidewall of the electrode, and the latching portion includes a second latching surface located on the side of the latching portion away from the sidewall; in the direction of the epitaxial layer pointing towards the electrode, the second latching surface is an inclined surface that gradually moves away from the sidewall.

[0020] Preferably, the second snap-fit ​​surface extends in the same direction as the first snap-fit ​​surface.

[0021] Preferably, the second snap-fit ​​surface is a convex surface.

[0022] The beneficial effects of this application are as follows: Unlike the prior art, the driving backplate of the display device provided in this application has a receiving groove at the pad for accommodating the electrodes of the light-emitting element, and a first elastic member and a second elastic member capable of elastic expansion and contraction are provided in the receiving groove. In its unforced natural state, the second elastic member releases elastic potential energy to abut against the latching member, causing the first elastic member to be in a compressed state. The latching member moves closer to the side wall of the receiving groove to allow space, without affecting the movement of the electrodes of the light-emitting element into the receiving groove, allowing the light-emitting element to be transferred to the driving backplate at any time. When the light-emitting element moves to the driving backplate, the electrodes of the light-emitting element move into the receiving groove, simultaneously applying a force towards the substrate to the second elastic member. The second elastic member is gradually compressed and abuts against the electrode. At this point, the second elastic member no longer abuts against the latching member. Driven by the first elastic member, the latching member moves towards the electrode and latches against it. Because the electrode is subjected to a force generated by the second elastic element while being snapped into the latching member, and the forces exerted on the electrode by the latching member and the second elastic element intersect, the connection between the electrode and the pad is more stable and tighter, thereby improving the reliability of the display device. This also eliminates the need for expensive anisotropic conductive adhesive (ACF) between the driver backplane and the light-emitting element, saving manufacturing costs. The light-emitting element provided in this application has a latching portion on the electrode that engages with the latching member, enabling the light-emitting element to be tightly connected to the pad, thus improving the reliability of the display device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of one embodiment of the drive backplate of this application in its natural state;

[0024] Figure 2 yes Figure 1 Top view;

[0025] Figure 3 This is a schematic diagram of another embodiment of the drive backplate of this application in its natural state.

[0026] Figure 4 yes Figure 3 Top view;

[0027] Figure 5This is a schematic diagram of one embodiment of the light-emitting element of this application;

[0028] Figure 6 This is a schematic diagram of the structure of the light-emitting element and driving backplate of this application before transfer;

[0029] Figure 7 This is a schematic diagram of the structure of the light-emitting element and driving backplate in this application during transfer;

[0030] Figure 8 This is a schematic diagram of the structure of the display device formed by the transfer of the light-emitting element and the driving backplate according to this application. Detailed Implementation

[0031] To make the objectives, technical solutions, and effects of this application clearer and more explicit, the following detailed description is provided with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] This application provides a display device, which includes a driving backplate and a light-emitting element. (See reference...) Figure 1 , Figure 1 This is a schematic diagram of the drive backplate 10 in its natural state according to one embodiment of the present application. The drive backplate 10 includes a base layer 11, pads 12, a snap-fit ​​member 13, and a second elastic member 15. The pads 12 are located on one side of the base layer 11. Specifically, there are at least two pads 12, which correspond to and are electrically connected to the first electrode and the second electrode of the light-emitting element (not shown). The first electrode and the second electrode can be P-electrode and N-electrode, respectively. Adjacent pads 12 are insulated from each other by an insulating portion 16 and are spaced apart. The pads 12 are provided with receiving grooves 124 for accommodating the electrodes of the light-emitting element. Each receiving groove 124 is used to accommodate one electrode. The snap-fit ​​member 13 is connected to the side wall of the receiving groove 124 through the first elastic member 14. The first elastic member 14 can be a compression spring or other elastic member, and the extension direction of the first elastic member 14 is parallel to the extension direction of the base layer 11. The second elastic member 15 is disposed in the receiving groove 124 and its extension direction intersects with the base layer 11. Preferably, the extension direction of the second elastic member 15 can be perpendicular to the base layer 11. In its unforced natural state, the second elastic member 15 abuts against the snap-fit ​​member 13, so that the first elastic member 14 is in a compressed state; when subjected to a force applied by the light-emitting element toward the base layer 11, the second elastic member 15 contracts and separates from the snap-fit ​​member 13, thereby releasing the elastic potential energy of the first elastic member 14, so that the snap-fit ​​member 13 snaps into the electrode of the light-emitting element.

[0033] The drive backplate 10 of the display device provided in this application has a receiving groove 124 at the pad 12 for accommodating the electrode of the light-emitting element, and a first elastic member 14 and a second elastic member 15 capable of elastic extension and retraction are provided in the receiving groove 124. In its unforced natural state, the second elastic member 15 releases elastic potential energy to abut against the latching member 13, compressing the first elastic member 14. The latching member 13 moves closer to the side wall of the receiving groove 124, without affecting the movement of the electrode of the light-emitting element into the receiving groove 124, allowing the light-emitting element to be transferred to the drive backplate 10 at any time. When the light-emitting element moves to the drive backplate 10, the electrode of the light-emitting element moves into the receiving groove 124, simultaneously applying a force towards the base layer 11 to the second elastic member 15. The second elastic member 15 is gradually compressed and abuts against the electrode. At this time, the second elastic member 15 no longer abuts against the latching member 13. Driven by the first elastic member 14, the latching member 13 moves towards the electrode and latches against it. Because the electrode is subjected to the force generated by the second elastic member 15 while it is snapped into the snap-fit ​​member 13, and the forces exerted on the electrode by the snap-fit ​​member 13 and the second elastic member 15 intersect, the connection between the electrode and the pad 12 is more stable and tight, thereby improving the reliability of the display device. As a result, it is possible to eliminate the need to place the relatively expensive heterogeneous conductive adhesive ACF between the driving backplate 10 and the light-emitting element, thus saving manufacturing costs.

[0034] Optionally, continue reading Figure 1 The second elastic element 15 includes a sub-elastic element 151 and a blocking element 152 connected to the sub-elastic element 151. The sub-elastic element 151 and the blocking element 152 are sequentially arranged in the direction away from the base layer 11. Specifically, the sub-elastic element 151 can be an elastic element such as a compression spring. The extension / retraction direction of the sub-elastic element 151 intersects with the extension / retraction direction of the first elastic element 14. In its unforced natural state, the blocking element 152 abuts against the snap-fit ​​element 13. When the second elastic element 15 is subjected to a force applied towards the base layer 11 by the light-emitting element, the sub-elastic element 151 contracts, causing the blocking element 152 to separate from the snap-fit ​​element 13. In this embodiment, the sub-elastic element 151 provides elastic potential energy to the blocking element 152. The blocking element 152 is used to block the snap-fit ​​element 13 in its natural state and abut against the electrode in the snap-fit ​​state.

[0035] Optionally, the materials of the snap-fit ​​member 13 and the first elastic member 14 both include conductive materials, and the materials of the sub-elastic member 151 and the blocking member 152 both include conductive materials. The conductive material can be a material with good conductivity, such as copper or titanium, to improve the conductivity between the electrode and the pad 12. In other embodiments, some or all of the snap-fit ​​member 13, the first elastic member 14, the sub-elastic member 151, and the blocking member 152 can be insulating materials, such as tetrafluoroethylene, as long as it ensures electrical connection between the electrode and other parts of the pad 12.

[0036] Optionally, continue reading Figure 1 The receiving groove 124 includes a first sub-groove 1241 and a second sub-groove 1242 that are connected. In the direction away from the base layer 11, the first sub-groove 1241 and the second sub-groove 1242 are arranged sequentially, and the orthographic projection of the second sub-groove 1242 on the base layer 11 covers the orthographic projection of the first sub-groove 1241 on the base layer 11. The snap-fit ​​member 13 is connected to the side wall of the second sub-groove 1242 through the first elastic member 14. At least a portion of the sub-elastic member 151 is disposed in the first sub-groove 1241, and when the second elastic member 15 is in its natural state without force, at least a portion of the blocking member 152 is located in the second sub-groove 1242 and abuts against the snap-fit ​​member 13. In this embodiment, the first sub-slot 1241 connects to the bottom wall of the second sub-slot 1242 and is used to accommodate the sub-elastic member 151 and the blocking member 152 in the retracted state. This allows the blocking member 152 to retract completely below the bottom wall of the second sub-slot 1242, while preventing the electrode from extending into the first sub-slot 1241. This ensures that the electrode is in close contact with the bottom wall of the second sub-slot 1242, improving the stability of the electrical connection. The first sub-slot 1241 only needs to be able to accommodate the electrode and the snap-fit ​​member 13, and the second sub-slot 1242 only needs to be able to accommodate the sub-elastic member 151 and the blocking member 152. The shapes of the two are not specifically limited in this application.

[0037] Optionally, continue reading Figure 1 In this embodiment, the pad 12 includes a third film layer 123, a second film layer 122, and a first film layer 121 sequentially stacked in a direction away from the substrate 11 (Z direction in the figure). A second sub-groove 1242 penetrates the first film layer 121, and the first sub-groove 1241 penetrates the second film layer 122 and extends into the third film layer 123. Specifically, the materials of the first film layer 121 and the third film layer 123 both include titanium, and the material of the second film layer 122 includes aluminum. The first sub-groove 1241 can be formed after the second film layer 122, and the second sub-groove 1242 can be formed after the first film layer 121.

[0038] Optionally, continue reading Figure 1 The latching member 13 includes a first latching surface 131 that is opposite to the first elastic member 14 and is used to latch the electrode. In the direction from the base layer 11 to the pad 12 (Z direction in the figure), the first latching surface 131 is an inclined surface that gradually moves away from the first elastic member 14. By latching the electrode with the first latching surface 131, since the first latching surface 131 gradually tilts towards the electrode in the direction opposite to the base layer 11, as the light-emitting element gradually approaches the base layer 11, the latching member 13 gradually approaches the electrode along the extension direction of the first latching surface 131, avoiding excessive impact on the electrode by the latching member 13. At the same time, the latching member 13 covers the side of the electrode opposite to the base layer 11 in the latched state, preventing the electrode from detaching from the second sub-slot 1242 and improving the reliability of the connection between the light-emitting element and the driving backplate 10.

[0039] Optionally, see Figure 2 , Figure 2 yes Figure 1 The top view shows the first contact surface 131, which is a concave surface. Specifically, the first contact surface 131 is an arc surface that is concave in the X direction. The first contact surface 131 limits the electrode in the Y direction, preventing the electrode from moving within the second sub-slot 1242 and improving the reliability of the connection between the light-emitting element and the driving backplate 10. In other embodiments, the first contact surface 131 may also be a plane.

[0040] Optionally, continue reading Figure 1 and Figure 2 The number of latching members 13 is two, and the two latching members 13 are arranged opposite each other in the X direction. Each latching member 13 is connected to the side wall of the receiving groove 124 through a first elastic member 14. The number of second elastic members 15 is at least two, and the second elastic members 15 are arranged in a one-to-one correspondence with the latching members 13. The two latching members 13 realize the limiting of the electrode in the X direction, prevent the electrode from moving within the second sub-groove 1242, and improve the reliability of the connection between the light-emitting element and the driving backplate 10. In other embodiments, the number of latching members 13 may also be four, with every two latching members 13 arranged opposite each other.

[0041] See Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of another embodiment of the drive backplate of this application in its natural state. Figure 4 yes Figure 3 A top view. Distinguished from... Figure 1 and Figure 2 In the illustrated embodiment, the second elastic element 15 is an integrated elastic structure. The second elastic element 15 is connected to the bottom wall of the receiving groove 124. Each pad 12 is provided with a corresponding second elastic element 15, and the snap-fit ​​element 13 abuts against both sides of the second elastic element 15. The pad 12 includes a second film layer 122 and a first film layer 121 sequentially stacked in the direction away from the base layer 11 (Z direction in the figure). The receiving groove 124 penetrates the first film layer 121. Specifically, the material of the first film layer 121 may include titanium, and the material of the second film layer 122 may include copper. In other embodiments, the pad 12 may also include only one film layer, which is not specifically limited in this application.

[0042] See Figure 5 , Figure 5This is a schematic diagram of one embodiment of the light-emitting element of this application. The light-emitting element 20 is used for electrical connection with the driving backplane 10 of any embodiment. The light-emitting element 20 includes an epitaxial layer 21 and an electrode 22 connected to one side of the epitaxial layer 21. The electrode 22 is provided with a snap-fit ​​portion 221 for snapping with a snap-fit ​​member 13. The snap-fit ​​portion 221 allows the electrode 22 to be more securely snapped with the snap-fit ​​member 13. Specifically, one epitaxial layer 21 can connect two electrodes 22, which are a P electrode 22 and an N electrode 22, respectively.

[0043] Optionally, the latching portion 221 is located on the sidewall of the electrode 22. The latching portion 221 includes a second latching surface 2211, which is located on the side of the latching portion 221 away from the sidewall. In the direction from the epitaxial layer 21 to the electrode 22, the second latching surface 2211 is an inclined surface that gradually moves away from the sidewall. Specifically, the second latching surface 2211 extends in the same direction as the first latching surface 131, and the second latching surface 2211 is a convex surface. The number and position of the latching portions 221 on each electrode 22 can correspond to the number of latching members 13. For example, when two oppositely arranged latching members 13 are provided on each pad 12, two latching portions 221 can also be provided on each electrode 22, with the two latching portions 221 oppositely arranged on both sides of the electrode 22. In other embodiments, the second latching surface 2211 can also be a plane.

[0044] See Figure 6-Figure 8 , Figure 6 This is a schematic diagram of the structure of the light-emitting element and driving backplate of this application before transfer. Figure 7 This is a schematic diagram of the structure of the light-emitting element and driving backplate in this application during transfer. Figure 8 This is a schematic diagram of the structure of the display device formed after the transfer of the light-emitting element and the driving backplate according to this application. The display device 100 includes a driving backplate 10 of any embodiment and a light-emitting element 20 of any embodiment; wherein at least a portion of the electrodes 22 are located within the receiving groove 124 and electrically connected to the pads 12, and the snap-fit ​​portion 221 snaps into the snap-fit ​​member 13. Figure 6 As shown, before the transfer, the second elastic element 15 or the sub-elastic element 151 is in a state of naturally releasing elastic potential energy. At this time, at least part of the second elastic element 15 or the blocking element 152 moves into the second sub-groove 1242, abutting against the side of the locking element 13 away from the first elastic element 14. At this time, the first elastic element 14 is in a contracted state, and the locking element 13 makes way, so that the electrode 22 can move into the second sub-groove 1242 without being blocked by the locking element 13. Figure 7As shown, during the transfer process, electrode 22 gradually approaches the base layer 11. As it extends into the second sub-groove 1242, electrode 22 presses down on the second elastic element 15, causing the second elastic element 15 or sub-elastic element 151 to be gradually compressed. As the second elastic element 15 or blocking element 152 gradually moves away from the locking element 13, the first elastic element 14 gradually releases its elastic potential energy. The first locking surface 131 and the second locking surface 2211 come into contact, and the locking element 13 gradually moves inward (as indicated by the arrow) until it is fully engaged with electrode 22, ultimately forming a... Figure 8 The display device 100 shown. Because the electrode 22 is subjected to the force generated by the second elastic member 15 while it is snapped into the snap-fit ​​member 13, the connection between the electrode 22 and the pad 12 is more stable and tight, thereby improving the reliability of the display device 100. As a result, it is not necessary to place the relatively expensive heterogeneous conductive adhesive ACF between the driving backplate 10 and the light-emitting element 20, thus saving manufacturing costs.

[0045] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A display device, characterized in that, The system includes a driving backplate and a light-emitting element, wherein the light-emitting element includes electrodes, and the driving backplate includes: grassroots level; A pad is located on one side of the base layer, and the pad is provided with a receiving groove for accommodating at least a portion of the electrode; The snap-fit ​​component is connected to the side wall of the receiving groove via a first elastic element; The second elastic element is disposed in the receiving groove and its extension and retraction direction intersects with the extension and retraction direction of the first elastic element; In its unforced natural state, the second elastic element abuts against the snap-fit ​​element, causing the first elastic element to be in a compressed state. When subjected to a force applied by the light-emitting element toward the substrate, the second elastic element contracts and separates from the snap-fit ​​element, thereby releasing the elastic potential energy of the first elastic element so that the snap-fit ​​element snaps onto the electrode of the light-emitting element.

2. The display device according to claim 1, characterized in that, The second elastic element includes a sub-elastic element and a blocking element connected to the sub-elastic element. The sub-elastic element and the blocking element are arranged sequentially in the direction away from the base layer. Wherein, the extension and retraction direction of the sub-elastic member intersects with the extension and retraction direction of the first elastic member; in the natural state of the second elastic member without force, the blocking member abuts against the snap-fit ​​member; and when the second elastic member is subjected to a force applied by the light-emitting element toward the base layer, the sub-elastic member contracts and the blocking member separates from the snap-fit ​​member. Preferably, the first elastic element includes a spring, and / or the sub-elastic element includes a spring; Preferably, the materials of the snap-fit ​​member and the first elastic member both include conductive materials, and / or the materials of the sub-elastic member and the blocking member both include conductive materials.

3. The display device according to claim 2, characterized in that, The receiving groove includes a first sub-groove and a second sub-groove that are connected. In the direction away from the base layer, the first sub-groove and the second sub-groove are arranged in sequence, and the orthographic projection of the second sub-groove on the base layer covers the orthographic projection of the first sub-groove on the base layer. The snap-fit ​​member is connected to the side wall of the second sub-groove via the first elastic member. At least a portion of the sub-elastic member is disposed within the first sub-groove. When the second elastic member is in its natural, unforced state, at least a portion of the blocking member is located within the second sub-groove and abuts against the snap-fit ​​member.

4. The display device according to claim 3, characterized in that, The pad includes a second film layer and a first film layer arranged sequentially in a direction away from the substrate, wherein the second sub-groove penetrates the first film layer, and the first sub-groove is at least disposed in the second film layer.

5. The display device according to claim 4, characterized in that, The pad further includes a third film layer, which is located on the side of the second film layer away from the first film layer, and the first sub-groove penetrates the second film layer and extends into the third film layer; Preferably, the materials of the first film layer and the third film layer both include titanium, and the material of the second film layer includes aluminum.

6. The display device according to claim 1, characterized in that, The snap-fit ​​component includes a first snap-fit ​​surface that is away from the first elastic member and is used to snap the electrode, wherein, in the direction of the base layer pointing towards the pad, the first snap-fit ​​surface is an inclined surface that gradually moves away from the first elastic member. Preferably, the first snap-fit ​​surface is a concave surface.

7. The display device according to claim 1, characterized in that, The number of the snap-fit ​​components is at least two, the at least two snap-fit ​​components are arranged opposite to each other, and each snap-fit ​​component is connected to the side wall of the receiving groove through the first elastic member; Preferably, the number of the second elastic element is at least two.

8. The display device according to any one of claims 1-7, characterized in that, The light-emitting element further includes an epitaxial layer, the electrode is connected to one side of the epitaxial layer, and the electrode is provided with a snap-fit ​​portion, which snaps into the snap-fit ​​component.

9. The display device according to claim 8, characterized in that, The latching portion is located on the sidewall of the electrode, and the latching portion includes a second latching surface, which is located on the side of the latching portion away from the sidewall; in the direction of the epitaxial layer pointing to the electrode, the second latching surface is an inclined surface that gradually moves away from the sidewall.

10. The display device according to claim 9, characterized in that, The second contact surface extends in the same direction as the first contact surface; Preferably, the second snap-fit ​​surface is a convex surface.

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