Display panel, display device and preparation method of display panel

Abstract

Embodiments of the present application provide a display panel, a display device and a preparation method of the display panel. The display panel comprises: a substrate; an electrode group arranged on the substrate; a blocking portion arranged on the substrate and arranged on the periphery of the electrode group, the thickness of the blocking portion is greater than the thickness of the electrode group in the thickness direction of the display panel, so that the blocking portion surrounds the electrode group to form a limiting groove; and a light emitting unit arranged on the side of the electrode group and the blocking portion away from the substrate, the light emitting unit comprises a contact electrode, the contact electrode is connected with the electrode group and is limited in the limiting groove. By arranging the blocking portion on the substrate to form the limiting groove, the limiting groove can provide limiting to the contact electrode of the light emitting unit, thereby improving the alignment accuracy of the light emitting unit and the electrode group.

Description

Technical Field

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

[0002] With the continuous development of display technology, people have increasingly higher requirements for the lifespan and display effect of display devices. Micro LED (Micro Light Emitting Diode) displays use inorganic materials as their light-emitting devices, offering advantages such as higher brightness and longer lifespan compared to organic light-emitting diode (OLED) displays. Therefore, Micro LED displays are gradually becoming the mainstream display technology.

[0003] Micro LED displays are made by forming Micro LED devices on sapphire, silicon, or other substrates, and then transferring these devices onto a thin-film transistor (TFT) array substrate. The TFT array substrate then drives the Micro LED devices to emit light. A set of electrodes is disposed on the TFT array substrate, and the Micro LED light-emitting units are connected to these electrodes to achieve light emission. Accurate alignment between the Micro LED light-emitting units and the electrode set significantly affects the yield of Micro LED display panels; therefore, it is crucial to improve the alignment precision of the Micro LED light-emitting units and the electrode set. Summary of the Invention

[0004] This application provides a display panel, a display device, and a method for manufacturing the display panel, aiming to improve the alignment accuracy of the light-emitting unit and the electrode assembly.

[0005] An embodiment of the first aspect of this application provides a display panel, including: a substrate; an electrode assembly disposed on the substrate; a blocking portion disposed on the substrate and around the electrode assembly, wherein the thickness of the blocking portion is greater than the thickness of the electrode assembly in the thickness direction of the display panel, so that the blocking portion surrounds the electrode assembly to form a limiting groove; and a light-emitting unit disposed on the side of the electrode assembly and the blocking portion away from the substrate, the light-emitting unit including a contact electrode connected to the electrode assembly, and at least a portion of the contact electrical limit is located in the limiting groove.

[0006] According to an embodiment of the first aspect of this application, the electrode assembly includes a first electrode and a second electrode, and the contact electrode includes a first contact electrode and a second contact electrode. The first electrode and the first contact electrode are electrically connected to each other, and the second electrode and the second contact electrode are electrically connected to each other. A blocking portion is disposed on the periphery of at least one of the first electrode and the second electrode. Several arrangements of the blocking portion are provided.

[0007] According to any of the foregoing embodiments of the first aspect of this application, the electrode assembly is provided with two blocking portions, one of which is disposed on the periphery of the first electrode and the other on the periphery of the second electrode, with the first contact electrode and the second contact electrode respectively located within two limiting grooves. This can further improve the alignment accuracy of the first contact electrode and the first electrode, as well as the alignment accuracy of the second contact electrode and the second electrode.

[0008] According to any of the foregoing embodiments of the first aspect of this application, it further includes: a conductive layer, wherein the contact electrode is electrically connected to the electrode group through the conductive layer; there are multiple electrode groups and multiple blocking portions, each blocking portion is arranged around each electrode group, there is a gap between two adjacent blocking portions, and a channel is formed on the blocking portion, the channel communicating with the limiting groove. By providing the channel, when the conductive layer is in a liquid state, it is convenient for the liquid conductive layer to flow out through the channel.

[0009] According to any of the foregoing embodiments of the first aspect of this application, the conductive layer includes a fusible adhesive and conductive particles located within the fusible adhesive, wherein the maximum size of the channel is smaller than the outer contour size of the conductive particles. This allows the conductive particles to be confined within the limiting groove, increasing the density of conductive particles within the limiting groove and improving the stability of the electrical connection between the contact electrode and the electrode assembly.

[0010] According to any of the foregoing embodiments of the first aspect of this application, multiple channels are spaced apart around the electrode assembly. By providing multiple channels, it is convenient for the fusible adhesive to flow out quickly from the limiting groove.

[0011] According to any of the foregoing embodiments of the first aspect of this application, the depth of the channel in the thickness direction of the display panel is greater than or equal to the difference between the thickness of the blocking portion and the thickness of the electrode assembly. That is, the channel extends at least to the side of the electrode assembly facing the substrate away from the upper surface of the substrate, and the channel is deep enough to facilitate the rapid flow of fusible adhesive from the limiting groove.

[0012] According to any of the foregoing embodiments of the first aspect of this application, in the thickness direction of the display panel, the thickness difference between the blocking portion and the electrode assembly is greater than the height of the conductive particles. This prevents conductive particles from flowing out from the top of the blocking portion away from the substrate, ensuring that there are a sufficient number of conductive particles in the limiting groove.

[0013] According to any of the foregoing embodiments of the first aspect of this application, the display panel further includes a conductive layer, and the contact electrodes are electrically connected to the electrode assembly through the conductive layer. The conductive layer includes a fusible adhesive and conductive particles located within the fusible adhesive. The blocking portion has an end face facing away from the substrate, and the blocking portion is inclined towards the limiting groove along the direction from the end face to the substrate to form a contact surface at least a portion of the inner surface of the electrode assembly. This allows the conductive particles to simultaneously contact the contact surface and the electrode assembly, improving stress concentration in the electrode assembly and increasing the service life of the electrode assembly.

[0014] According to any of the foregoing embodiments of the first aspect of this application, at least a portion of the contact surface is provided with a metal layer electrically connected to the electrode assembly. The metal layer can be electrically connected to the conductive particles, thereby increasing the flow rate between the electrode assembly and the conductive particles.

[0015] According to any of the foregoing embodiments of the first aspect of this application, the contact surface has a first end located on the end face and a second end connected to the electrode assembly, and the angle between the line connecting the first end and the second end and the surface of the electrode assembly is greater than or equal to 135°. This can better improve the stress concentration problem of the electrode assembly.

[0016] The second aspect of this application also provides a display device, including the display panel provided in any of the first aspect embodiments described above.

[0017] The third aspect of this application also provides a method for manufacturing a display panel, comprising:

[0018] An electrode assembly and a blocking portion are provided on the substrate. In the thickness direction of the display panel, the thickness of the blocking portion is greater than the thickness of the electrode assembly, so that the blocking portion forms a limiting groove around the electrode assembly.

[0019] The light-emitting unit is placed on the substrate, and the contact electrode of the light-emitting unit is located in the limiting groove and electrically connected to the electrode group.

[0020] According to the embodiment of the third aspect of this application, an electrode group and a blocking portion are provided on a substrate, wherein the thickness of the blocking portion is greater than the thickness of the electrode group in the thickness direction of the display panel, so that the blocking portion forms a limiting groove around the electrode group:

[0021] A conductive metal layer is coated on a substrate, and the conductive metal layer is patterned to form an electrode assembly.

[0022] A barrier material layer is then fabricated on the substrate, and the barrier material layer is patterned to form a limiting groove so that the electrode assembly is exposed from the limiting groove.

[0023] According to the embodiment of the third aspect of this application, an electrode group and a blocking portion are provided on a substrate, wherein the thickness of the blocking portion is greater than the thickness of the electrode group in the thickness direction of the display panel, so that the blocking portion forms a limiting groove around the electrode group:

[0024] A barrier material layer is coated on the substrate, and the barrier material layer is patterned to form a limiting groove;

[0025] Electrode groups are prepared within the limiting groove.

[0026] This application provides a display panel, a display device, and a method for manufacturing the display panel. The display panel provided in this application includes a substrate and an electrode assembly, a blocking portion, and a light-emitting unit disposed on the substrate. The blocking portion is disposed around the electrode assembly, and the contact electrode of the light-emitting unit is connected to the electrode assembly within a positioning groove. The positioning groove provides positioning for the contact electrode, thereby improving the alignment accuracy between the contact electrode and the electrode assembly. Therefore, by providing a blocking portion and forming a positioning groove on the substrate, this application can improve the alignment accuracy between the light-emitting unit and the electrode assembly by providing positioning for the contact electrode of the light-emitting unit. Attached Figure Description

[0027] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0028] Figure 1 This is a schematic diagram of the structure of a display panel provided in the first aspect embodiment of this application;

[0029] Figure 2 yes Figure 1 Sectional view at point AA;

[0030] Figure 3 This is provided by another embodiment of the first aspect of this application. Figure 1 Sectional view at point AA;

[0031] Figure 4 This is provided by yet another embodiment of the first aspect of this application. Figure 1 Sectional view at point AA;

[0032] Figure 5 This is a top view of a portion of the layer structure of the display panel in the first aspect embodiment of this application;

[0033] Figure 6 This application also provides an embodiment of the first aspect. Figure 1 Sectional view at point AA;

[0034] Figure 7 This is an embodiment of the first aspect of this application. Figure 5 Sectional view at point BB;

[0035] Figure 8 This is another embodiment of the first aspect of this application. Figure 5Sectional view at point BB;

[0036] Figure 9 This is provided in another embodiment of the first aspect of this application. Figure 1 Sectional view at point AA;

[0037] Figure 10 This is provided in another embodiment of the first aspect of this application. Figure 1 Sectional view at point AA;

[0038] Figure 11 This is a top view of a partial layer structure of a display panel provided in another embodiment of the first aspect of this application;

[0039] Figure 12 This is provided in another embodiment of the first aspect of this application. Figure 1 Sectional view at point AA;

[0040] Figure 13 This is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of the third aspect of this application;

[0041] Figure 14 This is a schematic flowchart of a method for manufacturing a display panel according to an embodiment of this application;

[0042] Figures 15 to 19 This is a schematic diagram of the process for manufacturing a display panel according to the third aspect embodiment of this application;

[0043] Figure 20 This is a schematic flowchart of a method for manufacturing a display panel according to another embodiment of this application;

[0044] Figures 21 to 25 This is a schematic diagram of a method for manufacturing a display panel according to another embodiment of the third aspect of this application.

[0045] Explanation of reference numerals in the attached figures:

[0046] 100. Display panel;

[0047] 10. Substrate;

[0048] 20. Electrode assembly; 21. First electrode; 22. Second electrode;

[0049] 30. Blocking part; 31. Limiting groove; 32. Channel; 33. Contact surface;

[0050] 40. Light-emitting unit; 41. Contact electrode; 411. First contact electrode; 412. Second contact electrode; 42. Light-emitting structure;

[0051] 50. Conductive layer; 51. Fusible adhesive; 52. Conductive particles. Detailed Implementation

[0052] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0053] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] To better understand this application, the following will be combined with... Figures 1 to 25 The display panel 100, display device, and method for manufacturing the display panel 100 according to embodiments of this application will be described in detail.

[0056] Figure 1 This is a schematic diagram of the structure of a display panel 100 provided in the first aspect of this application. Figure 2 for Figure 1 Sectional view at point AA.

[0057] like Figure 1 and Figure 2As shown, the display panel 100 provided in the first aspect embodiment of this application includes: a substrate 10; an electrode assembly 20 disposed on the substrate 10; and a blocking portion 30 disposed on the substrate 10 and on the periphery of the electrode assembly 20, in the thickness direction of the display panel 100. Figure 2 In the Z direction, the thickness of the blocking part 30 is greater than the thickness of the electrode group 20, so that the blocking part 30 surrounds the electrode group 20 to form a limiting groove 31; the light-emitting unit 40 is disposed on the side of the electrode group 20 and the blocking part 30 away from the substrate 10, the light-emitting unit 40 includes a contact electrode 41, the contact electrode 41 is connected to the electrode group 20, and at least a portion of the contact electrode 41 is limited in the limiting groove 31.

[0058] In the display panel 100 provided in this embodiment, the display panel 100 includes a substrate 10 and an electrode group 20, a blocking portion 30, and a light-emitting unit 40 disposed on the substrate 10. The blocking portion 30 forms a limiting groove 31 on the periphery of the electrode group 20, and the contact electrode 41 of the light-emitting unit 40 is connected to the electrode group 20 within the limiting groove 31. The limiting groove 31 can provide positioning for the contact electrode 41, thereby improving the alignment accuracy between the contact electrode 41 and the electrode group 20. Therefore, by providing the blocking portion 30 and forming the limiting groove 31 on the substrate 10, this application can provide limiting for the contact electrode 41 of the light-emitting unit 40, thereby improving the alignment accuracy between the light-emitting unit 40 and the electrode group 20.

[0059] The substrate 10 can be a TFT substrate. The substrate 10 includes a substrate and a driving circuit disposed on the substrate. The driving circuit includes, for example, a thin film transistor. The substrate 10 can drive the light-emitting unit 40 to emit light.

[0060] The electrode group 20 includes a first electrode 21 and a second electrode 22, one of which is a positive electrode and the other is a negative electrode.

[0061] The light-emitting unit 40 includes, for example, a light-emitting structure 42, with a contact electrode 41 disposed on the side of the light-emitting structure 42 facing the substrate 10. Optionally, the contact electrode 41 includes a first contact electrode 411 and a second contact electrode 412, with the first contact electrode 411 electrically connected to the first electrode 21, and the second contact electrode 412 electrically connected to the second electrode 22. The light-emitting structure 42 includes, for example, a first semiconductor region, a second semiconductor region, and a light-emitting region disposed between the first semiconductor region and the second semiconductor region, with the first semiconductor region and the first contact electrode 411 interconnected, and the second semiconductor region and the second contact electrode 412 interconnected.

[0062] Optionally, the display panel 100 includes a plurality of light-emitting units 40, each of which is correspondingly provided with an electrode group 20, and each of the electrode groups 20 is correspondingly provided with a blocking portion 30 on its periphery. Alternatively, at least some of the electrode groups 20 are correspondingly provided with blocking portions 30 on their periphery. When the contact electrodes 41 of some of the plurality of light-emitting units 40 are electrically connected to the electrode groups 20 through the limiting grooves 31 of the blocking portions 30, other light-emitting units 40 will also dock with the corresponding electrode groups 20.

[0063] Please continue reading. Figure 1 and Figure 2 In some optional embodiments, when the electrode group 20 includes a first electrode 21 and a second electrode 22, the blocking portion 30 is disposed on the periphery of at least one of the first electrode 21 and the second electrode 22. That is, the blocking portion 30 is disposed on the periphery of the first electrode 21, or on the periphery of the second electrode 22, or on the periphery of both the first electrode 21 and the second electrode 22. In these optional embodiments, only one limiting groove 31 needs to be provided for a set of light-emitting units 40 and electrode group 20, which simplifies the structure of the blocking portion 30 and simplifies the fabrication of the display panel 100.

[0064] Please see Figure 1 and Figure 3 , Figure 3 This is provided by yet another embodiment of the first aspect of this application. Figure 1 Sectional view at point AA.

[0065] like Figure 1 and Figure 3 As shown, optionally, the electrode group 20 is provided with two blocking parts 30. One of the two blocking parts 30 is disposed on the periphery of the first electrode 21, and the other is disposed on the periphery of the second electrode 22. The first contact electrode 411 and the second contact electrode 412 are respectively located in two limiting grooves. That is, the first contact electrode 411 and the second contact electrode 412 are respectively connected to the first electrode 21 and the second electrode 22 in the two limiting grooves 31.

[0066] In these optional embodiments, the limiting groove 31 provides a limiting position to the first contact electrode 411, which can improve the alignment accuracy of the first contact electrode 411 and the first electrode 21. Similarly, the limiting groove 31 provides a limiting position to the second contact electrode 412, which can improve the alignment accuracy of the second contact electrode 412 and the second electrode 22. This can further improve the alignment accuracy of the light-emitting unit 40 and the electrode group 20, and improve the yield of the display panel 100.

[0067] There are several ways to electrically connect the contact electrode 41 and the electrode group 20, such as direct contact connection between the contact electrode 41 and the electrode group 20.

[0068] Please see Figure 1 and Figure 4 , Figure 4 This is provided by yet another embodiment of the first aspect of this application. Figure 1 Sectional view at point AA.

[0069] like Figure 1 and Figure 4 As shown, in some alternative embodiments, the contact electrode 41 and the electrode group 20 are electrically connected to each other through the conductive layer 50.

[0070] Please see Figure 1 , Figure 5 and Figure 6 , Figure 5 This is a top view of a portion of the layer structure of the display panel 100 in the first aspect embodiment of this application. Figure 6 This application also provides an embodiment of the first aspect. Figure 1 Sectional view at point AA.

[0071] like Figure 1 , Figure 5 and Figure 6 As shown, each blocking portion 30 is arranged around each electrode group 20, with a gap between adjacent blocking portions 30. A channel 32 is formed on each blocking portion 30, and the channel 32 communicates with the limiting groove 31. In these optional embodiments, when the conductive layer 50 is squeezed during the transfer of the light-emitting unit 40, the conductive layer 50 can flow out through the channel 32, reducing the distance between the electrode group 20 and the contact electrode 41, and ensuring the stability of the contact between the electrode group 20 and the contact electrode 41.

[0072] The conductive layer 50 is, for example, an anisotropic conductive film (ACF), comprising a fusible adhesive 51 and conductive particles 52 located within the fusible adhesive 51. The conductive layer 50 has the characteristic of being fusible at high temperatures. During the transfer of the light-emitting unit 40, the conductive layer 50 can be first bonded or coated on the electrode assembly 20, for example, within the limiting groove 31, and then the conductive particles 52 in the conductive layer 50 can be crushed through this pressing process, so that the electrode assembly 20 and the contact electrode 41 are electrically connected to each other.

[0073] Optionally, the maximum size of the channel 32 is smaller than the outer contour size of the conductive particle 52. In these optional embodiments, when the light-emitting unit 40 extrudes the conductive layer 50, the fusible adhesive 51 of the conductive layer 50 can flow out from the limiting groove 31 through the channel 32. However, since the maximum size of the channel 32 is smaller than the outer contour size of the conductive particle 52, the conductive particle 52 cannot flow out from the channel 32. Therefore, the conductive particle 52 can be confined within the limiting groove 31, which can increase the density of the conductive particle 52 within the limiting groove 31 and improve the connection yield between the electrode assembly 20 and the contact electrode 41.

[0074] Optionally, in the thickness direction, the thickness difference between the blocking part 30 and the electrode group 20 is greater than the height of the conductive particles 52. That is, the depth of the limiting groove 31 is greater than the height of the conductive particles 52, which can prevent the conductive particles 52 from flowing out from the opening of the limiting groove 31 toward the contact electrode 41, increase the density of conductive particles 52 in the limiting groove 31, and improve the connection yield of the electrode group 20 and the contact electrode 41.

[0075] For the same electrode group 20, there can be one or more channels 32. Optionally, multiple channels 32 are distributed around the electrode group 20 at intervals. By setting multiple channels 32, it is beneficial for the conductive layer 50 to be quickly discharged from the limiting groove 31, which can improve the manufacturing efficiency of the display panel 100.

[0076] Please continue reading. Figure 1 , Figure 5 and Figure 6 In some alternative embodiments, the first electrode 21 and the second electrode 22 are respectively provided with limiting grooves 31, that is, the electrode group 20 is provided with two limiting grooves 31. The first electrode 21 and the second electrode 22 are both surrounded by blocking portions 30, and the blocking portions 30 are provided with multiple channels 32 surrounding the first electrode 21 or the second electrode 22, and the multiple channels 32 are distributed at intervals around the first electrode 21 and the second electrode 22 respectively.

[0077] Optionally, both the electrode assembly 20 and the blocking portion 30 are disposed on the surface of the substrate 10, and the depth of the channel 32 can be configured in various ways. Please refer to [link / reference]. Figure 7 and Figure 8 , Figure 7 This is an embodiment of the first aspect of this application. Figure 5 Sectional view at point BB. Figure 8 This is another embodiment of the first aspect of this application. Figure 5 Sectional view at point BB.

[0078] like Figure 7 As shown, the channel 32 can be provided to penetrate the blocking portion 30 along the thickness direction. Alternatively, as... Figure 8 As shown, the depth of the channel 32 is equal to the difference between the thickness of the blocking portion 30 and the thickness of the electrode group 20, that is, the channel 32 extends to the upper surface of the electrode group 20 away from the substrate 10.

[0079] Optionally, the depth of the channel 32 is greater than or equal to the difference between the thickness of the blocking portion 30 and the thickness of the electrode assembly 20. This allows the fusible adhesive 51 in the conductive layer 50 to flow out more effectively.

[0080] Please see Figure 1 and Figure 9 , Figure 9 This is provided in another embodiment of the first aspect of this application. Figure 1Sectional view at point AA.

[0081] like Figure 9 As shown, in some optional embodiments, when the contact electrode 41 is interconnected with the electrode assembly 20 through the conductive layer 50, the conductive layer 50 includes a fusible adhesive 51 and conductive particles 52 located within the fusible adhesive 51, the blocking portion 30 has an end face facing away from the substrate 10, and the blocking portion 30 is inclined toward the limiting groove 31 in the direction from the end face to the substrate 10 to form a contact surface 33.

[0082] The inventors discovered that the conductive particles 52 are typically spherical or ellipsoidal, while the surfaces of the first electrode 21 and the second electrode 22 in the electrode assembly 20 are typically planar. The point-to-surface contact between the conductive particles 52 and the first electrode 21 or the second electrode 22 leads to a smaller flow rate and stress concentration on the first electrode 21 or the second electrode 22. When the contact electrode 41 on the light-emitting unit 40 presses against the conductive particles 52, it may cause excessive stress on some surfaces of the first electrode 21 or the second electrode 22, resulting in cracks and other damage, thus reducing the service life of the first electrode 21 and the second electrode 22.

[0083] In this application, by providing an inclined contact surface 33 on the blocking part 30, the contact surface 33 can contact the conductive particles 52, so that the conductive particles 52 simultaneously contact the contact surface 33 and the plane on the first electrode 21 or the second electrode 22, thereby improving the stress concentration problem on the first electrode 21 or the second electrode 22.

[0084] Please see Figure 1 and Figure 10 , Figure 10 This is provided in another embodiment of the first aspect of this application. Figure 1 Sectional view at point AA.

[0085] like Figure 1 and Figure 10 As shown, optionally, at least a portion of the contact surface 33 is provided with a metal layer electrically connected to the electrode assembly 20. The conductive particles 52 can also be electrically connected to the electrode assembly 20 at the contact surface 33, increasing the current flow rate between the conductive particles 52 and the electrode assembly 20 when current flows through them. The metal layer is, for example, integrally formed with the first electrode 41 or the second electrode 42, and the material of the metal layer is the same as that of the first electrode 41 or the second electrode 42.

[0086] Optionally, the contact surface 33 can be an inclined surface, or the contact surface 33 can also be an arc-shaped surface. When the contact surface 33 is an arc-shaped surface, the contact surface 33 can be protruding into the limiting groove 31, or the contact surface 33 can be recessed into the blocking part 30.

[0087] Optionally, multiple blocking portions 30 are arranged separately from each other, with each electrode group 20 corresponding to a single blocking portion 30. Optionally, such as... Figure 10 As shown, each electrode group 20 is provided with a single blocking part 30. Due to the presence of the contact surface 33, the longitudinal section of the blocking part 30 can be triangular or trapezoidal, etc. In other embodiments, the blocking parts 30 corresponding to multiple electrode groups 20 can also be integrally provided.

[0088] Optionally, the contact surface 33 has a first end located on the end face and a second end connected to the electrode assembly 20, and the angle between the line connecting the first end and the second end and the surface of the electrode assembly 20 is greater than or equal to 135°. That is, the angle between the line connecting the first end and the second end and the surface of the first electrode 21 or the second electrode 22 is greater than or equal to 135°, which can better improve the stress concentration problem on the first electrode 21 or the second electrode 22. Optionally, the contact surface 33 is a plane, and the angle between the contact surface 33 and the surface of the first electrode 21 or the second electrode 22 is greater than or equal to 135°.

[0089] Please see Figure 1 , Figure 11 and Figure 12 , Figure 11 This is a partial layer structure top view of the display panel 100 provided in another embodiment of the first aspect of this application. Figure 12 This is provided in another embodiment of the first aspect of this application. Figure 1 Sectional view at point AA.

[0090] like Figure 1 , Figure 11 and Figure 12 Both the first electrode 21 and the second electrode 22 are provided with corresponding limiting grooves 31 for the blocking portion 30, and the surfaces of the blocking portion 30 facing the limiting groove 31 are all contact surfaces 33. In addition, the limiting groove 31 is formed by the recess of the blocking portion 30 away from the substrate 10.

[0091] like Figure 12 As shown, multiple electrode groups 20 are integrally provided with multiple blocking portions 30 corresponding to them. The limiting groove 31 is formed by the surface of the blocking portion 30 facing away from the substrate 10. Each electrode group 20 is located in each limiting groove 31. For example, when the electrode group 20 includes a first electrode 21 and a second electrode 22, each first electrode 21 is located in each limiting groove 31, and each second electrode 22 can also be located in each limiting groove 31.

[0092] Optionally, when the blocking part 30 is provided with a contact surface 33, the blocking part 30 may also be provided with a channel 32. Alternatively, the blocking part 30 may be provided with either a contact surface 33 or a channel 32.

[0093] The second aspect of this application also provides a display device, including the display panel 100 of any of the first aspect embodiments described above. Since the display device provided in the second aspect of this application includes the display panel 100 of any of the first aspect embodiments described above, it has the beneficial effects of the display panel 100 of any of the first aspect embodiments described above, which will not be elaborated further here.

[0094] The display devices in this application include, but are not limited to, mobile phones, personal digital assistants (PDAs), tablet computers, e-books, televisions, access control systems, smart landline phones, control consoles, and other devices with display functions.

[0095] Please see Figure 13 , Figure 13 This is a schematic flowchart illustrating a method for manufacturing a display panel 100 according to an embodiment of the third aspect of this application. The display panel 100 can be as described above. Figures 1 to 12 The display panel 100 of any of the first aspects of the embodiment.

[0096] like Figures 1 to 13 As shown, the method for manufacturing the display panel 100 includes:

[0097] Step S01: An electrode assembly 20 and a blocking portion 30 are provided on the substrate 10. In the thickness direction of the display panel 100, the thickness of the blocking portion 30 is greater than the thickness of the electrode assembly 20, so that the blocking portion 30 forms a limiting groove 31 around the electrode assembly 20.

[0098] Step S02: Place the light-emitting unit 40 on the substrate 10, and position the contact electrode 41 of the light-emitting unit 40 in the limiting groove 31 and electrically connect it to the electrode group 20.

[0099] The display panel 100 prepared by the manufacturing method provided in this application can form a limiting groove 31 in step S01, and provide positioning for the contact electrode 41 through the limiting groove 31 in step S02, so that the contact electrode 41 and the electrode group 20 are interconnected within the limiting groove 31. The limiting groove 31 can provide positioning for the contact electrode 41, thereby improving the alignment accuracy between the contact electrode 41 and the electrode group 20. Therefore, by providing a blocking portion 30 to form a limiting groove 31 on the substrate 10, the limiting groove 31 can provide positioning for the contact electrode 41 of the light-emitting unit 40, thereby improving the alignment accuracy between the light-emitting unit 40 and the electrode group 20.

[0100] Furthermore, when the contact electrode 41 and the electrode group 20 are interconnected through the conductive layer 50, and the conductive layer 50 includes conductive particles 52 located within the fusible adhesive 51, in step S02, the process of placing the light-emitting unit 40 on the substrate 10 specifically includes pressing the light-emitting unit 40, such that the contact electrode 41 of the light-emitting unit 40 and the electrode group 20 are pressed together through the conductive layer 50. During the pressing process, the conductive layer 50 is in a liquid state. When the light-emitting unit 40 can move relative to the substrate 10, the limiting groove 31 can provide a limiting effect on the contact electrode 41, preventing the contact electrode 41 and the electrode group 20 from misaligning.

[0101] There are multiple methods for preparing steps S01 and S02, which are optional. Please refer to [link / reference needed]. Figures 14 to 19 , Figure 14 This is a schematic flowchart of a method for manufacturing a display panel 100 according to an embodiment of this application. Figures 15 to 19 This is a schematic diagram of the manufacturing process of the display panel 100 provided in the third aspect embodiment of this application.

[0102] like Figures 14 to 19 As shown, step S01 includes:

[0103] Step S011: As Figure 15 As shown, a conductive metal layer is coated on the substrate 10, and the conductive metal layer is patterned to form an electrode group 20.

[0104] Step S012: As Figure 16 As shown, a barrier material layer is further prepared on the substrate 10, and the barrier material layer is patterned to form a limiting groove 31 so that the electrode assembly 20 is exposed from the limiting groove 31.

[0105] The order of steps S011 and S012 can be reversed, that is, step S012 can be prepared first and then step S011 can be prepared.

[0106] Optionally, the blocking portion 30 is provided with the aforementioned channel 32. The process may further include the following steps after step S012:

[0107] Step S013: As Figure 17 As shown, a conductive layer 50 is disposed on the substrate 10, and the conductive layer 50 is subjected to high temperature treatment to make the conductive layer 50 liquid.

[0108] Step S02 also includes:

[0109] Step S021: As Figure 18 As shown, the light-emitting unit 40 is disposed on the side of the electrode group 20 away from the substrate 10, so that the contact electrode 41 is located in the limiting groove 31.

[0110] Optionally, the thickness of the conductive layer 50 is greater than the thickness of the blocking portion 30, and the contact electrode 41 is immersed in the conductive layer 50 and located in the limiting groove 31.

[0111] Step S022: As Figure 19 As shown, pressure is applied to the light-emitting unit 40 toward the substrate 10, causing the fusible adhesive 51 of the conductive layer 50 in part of the limiting groove 31 to flow out from the channel 32, and the contact electrode 41 is electrically connected to the electrode group 20 through the conductive particles 52.

[0112] Please see Figures 20 to 25 , Figure 20 This is a schematic flowchart of a method for manufacturing a display panel 100 according to another embodiment of this application. Figures 21 to 25 This is a schematic diagram of the manufacturing process of a display panel 100 provided in another embodiment of the third aspect of this application.

[0113] like Figures 20 to 25 As shown, in some alternative embodiments, the blocking portion 30 may be prepared first, followed by the electrode assembly 20.

[0114] Optionally, step S01 includes:

[0115] Step S011': As Figure 21 As shown, a barrier material layer is coated on the substrate 10, and the barrier material layer is patterned to form a limiting groove 31.

[0116] Optionally, in step S011', the contact surface 33 described above may be formed on the blocking portion 30.

[0117] Step S012': As Figure 22 As shown, electrode assembly 20 is prepared within limiting groove 31.

[0118] Optionally, step S012' may include the following:

[0119] Step S013': As Figure 23 As shown, a conductive layer 50 is disposed on the substrate 10, and the conductive layer 50 is subjected to high temperature treatment to make the conductive layer 50 liquid.

[0120] Step S02 also includes:

[0121] Step S021': As Figure 24 As shown, the light-emitting unit 40 is disposed on the side of the electrode group 20 away from the substrate 10, so that the contact electrode 41 is located in the limiting groove 31.

[0122] Optionally, the thickness of the conductive layer 50 is greater than the thickness of the blocking portion 30, and the contact electrode 41 is immersed in the conductive layer 50 and located in the limiting groove 31.

[0123] Step S022': As Figure 25 As shown, pressure is applied to the light-emitting unit 40 toward the substrate 10, causing the fusible adhesive 51 of the conductive layer 50 in part of the limiting groove 31 to flow out from the channel 32, and the contact electrode 41 is electrically connected to the electrode group 20 through the conductive particles 52.

[0124] Optionally, when the contact surface 33 is formed in step S011', the electrode assembly 20 can also be formed on the contact surface 33 in step S012'. For example, in step S012', a metal layer can be formed on the blocking portion 30, and the metal layer can be patterned to form the electrode assembly 20. When patterning the metal layer, a portion of the metal layer located on the contact surface 33 can be retained to increase the area of ​​the electrode assembly 20 and improve the flow rate between the electrode assembly 20 and the contact electrode 41.

[0125] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that, include: substrate; Electrode groups are disposed on the substrate; A blocking portion is provided on the substrate and on the periphery of the electrode group. In the thickness direction of the display panel, the thickness of the blocking portion is greater than the thickness of the electrode group, so that the blocking portion forms a limiting groove around the electrode group. A light-emitting unit is disposed on the side of the electrode group and the blocking portion away from the substrate. The light-emitting unit includes a contact electrode connected to the electrode group, and at least a portion of the contact electrical limit is located in the limiting groove. A conductive layer is provided, through which the contact electrodes are electrically connected to the electrode assembly; The electrode group is multiple, the blocking part is multiple, each blocking part is arranged around each electrode group, there is a gap between two adjacent blocking parts, and a channel is formed on the blocking part, the channel is connected to the limiting groove; The conductive layer includes a fusible adhesive and conductive particles located within the fusible adhesive, wherein the maximum size of the channel is smaller than the outer contour size of the conductive particles.

2. The display panel according to claim 1, characterized in that, The electrode assembly includes a first electrode and a second electrode, and the contact electrode includes a first contact electrode and a second contact electrode. The first electrode and the first contact electrode are electrically connected to each other, and the second electrode and the second contact electrode are electrically connected to each other. The blocking portion is disposed on the periphery of at least one of the first electrode and the second electrode.

3. The display panel according to claim 2, characterized in that, The electrode group is provided with two blocking parts, one of which is located on the periphery of the first electrode and the other is located on the periphery of the second electrode. The first contact electrode and the second contact electrode are respectively located in the two limiting grooves.

4. The display panel according to claim 1, characterized in that, The multiple channels are spaced apart around the electrode group.

5. The display panel according to claim 1, characterized in that, The depth of the channel in the thickness direction of the display panel is greater than or equal to the difference between the thickness of the blocking portion and the thickness of the electrode assembly.

6. The display panel according to claim 1, characterized in that, In the thickness direction of the display panel, the difference in thickness between the blocking portion and the electrode group is greater than the height of the conductive particles.

7. The display panel according to claim 1, characterized in that, The blocking portion has an end face away from the substrate, and at least a portion of the inner surface of the blocking portion facing the electrode assembly is inclined toward the limiting groove along the direction from the end face to the substrate to form a contact surface.

8. The display panel according to claim 7, characterized in that, At least a portion of the contact surface is provided with a metal layer that is electrically connected to the electrode assembly.

9. The display panel according to claim 7, characterized in that, The contact surface has a first end located on the end face and a second end connected to the electrode group, and the angle between the line connecting the first end and the second end and the surface of the electrode group is greater than or equal to 135°.

10. A display device, characterized in that, Includes the display panel as described in any one of claims 1-9.

11. A method for manufacturing a display panel, characterized in that, include: An electrode group and a blocking part are disposed on a substrate. In the thickness direction of the display panel, the thickness of the blocking part is greater than the thickness of the electrode group, so that the blocking part forms a limiting groove around the electrode group. There are multiple electrode groups and multiple blocking parts. Each blocking part is disposed around each electrode group. There is a gap between two adjacent blocking parts. A channel is formed on the blocking part, and the channel communicates with the limiting groove. A conductive layer is disposed on the substrate and subjected to high-temperature treatment to bring the conductive layer to a liquid state. The conductive layer comprises a fusible adhesive and conductive particles located within the fusible adhesive. The maximum dimension of the channel is smaller than the outer contour dimension of the conductive particles. A light-emitting unit is disposed on a substrate, and pressure is applied to the light-emitting unit toward the substrate, causing a portion of the fusible adhesive of the conductive layer in the limiting groove to flow out from the channel, so that the contact electrode of the light-emitting unit is located in the limiting groove and electrically connected to the electrode group through the conductive particles of the conductive layer.

12. The method according to claim 11, characterized in that, In the step of setting an electrode assembly and a blocking portion on a substrate, wherein the thickness of the blocking portion is greater than the thickness of the electrode assembly in the thickness direction of the display panel, so that the blocking portion forms a limiting groove around the electrode assembly: A conductive metal layer is coated on the substrate, and the conductive metal layer is patterned to form an electrode assembly. A barrier material layer is further prepared on the substrate, and the barrier material layer is patterned to form a limiting groove so that the electrode assembly is exposed through the limiting groove.

13. The method according to claim 11, characterized in that, In the step of setting an electrode assembly and a blocking portion on a substrate, wherein the thickness of the blocking portion is greater than the thickness of the electrode assembly in the thickness direction of the display panel, so that the blocking portion forms a limiting groove around the electrode assembly: A barrier material layer is coated on the substrate, and the barrier material layer is patterned to form a limiting groove; An electrode assembly is prepared within the limiting groove.

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