Display panel and display device

Abstract

The invention provides a display panel and a display device.The display panel comprises a first retaining wall and at least one light-emitting public layer, the first retaining wall is located in a non-display area and extends along the edge of a display area, the light-emitting public layer is partially arranged on the first retaining wall, the first retaining wall comprises a heightening part and a partition part stacked on the heightening part, and the partition part is located in the non-display area and extends along the edge of the display area. According to the display panel, at least one side surface of the heightening part of the first retaining wall is shrunk inwards relative to at least one side surface of the same side of the partition part to form the first undercut opening, so that the light-emitting common layer is broken at the first undercut opening, the light-emitting common layer in the non-display area can be prevented from electrochemical corrosion, the packaging performance of the display panel can be improved, and the display effect of the display panel is improved. The condition of poor display is avoided, so that the reliability of the display panel can be improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] With the development of display technology, in order to ensure the front-facing camera effect of mobile phones, holes are usually made in the display panel. The encapsulation reliability of the hole area is affected by the side exposure of the organic vapor-deposited film layer. Under high temperature and high humidity, water vapor and oxygen permeation affect the reliability of the display screen.

[0003] To mitigate the effects of moisture penetration, several metal partition structures are typically placed between the opening area and the display area to separate the organic material from the cathode. However, due to incomplete cathode isolation in some locations, there is continuous overlap between the cathode and the metal partition structure, which can easily lead to electrochemical corrosion and worsen the effects of moisture penetration, resulting in display defects on the display panel.

[0004] Therefore, it is necessary to provide a display panel and display device to improve this deficiency. Summary of the Invention

[0005] This application provides a display panel and display device that can solve the problem of poor display.

[0006] To achieve the above objectives, according to a first aspect of this application, a display panel is provided, having a display area and a non-display area, the display panel comprising: A first retaining wall is located in the non-display area and extends along the edge of the display area; and At least one light-emitting common layer is partially disposed on the first retaining wall; The first barrier wall includes a raised portion and a partition portion stacked on the raised portion. At least one side of the raised portion is recessed inward relative to at least one side of the partition portion on the same side to form a first undercut opening. The light-emitting common layer is disconnected at the first barrier wall at the first undercut opening.

[0007] Optionally, the distance by which the bottom of at least one side of the raised portion is inwardly contracted relative to the bottom of the bottom of at least one side of the partition portion on the same side is greater than the thickness of the light-emitting common layer.

[0008] Optionally, the partition portion is provided with insulation from the adjacent light-emitting common layer.

[0009] Optionally, the thickness of the raised portion is greater than the thickness of the light-emitting common layer.

[0010] Optionally, the display panel includes a first flat layer, and the raised portion is disposed on the same layer as the first flat layer and is made of the same material.

[0011] Optionally, the thickness of the raised portion is less than the thickness of the portion of the first flat layer located in the display area.

[0012] Optionally, the ratio of the thickness of the raised portion to the thickness of the portion of the first flat layer located in the display area is greater than or equal to 3:25 and less than or equal to 2:3.

[0013] Optionally, the display panel includes at least one source / drain layer, and the at least one source / drain layer is disposed on the organic material layer.

[0014] Optionally, the angle between the tangent at any point on at least one side of the raised portion and the reference plane is greater than or equal to 50 degrees and less than or equal to 80 degrees, and the reference plane is parallel to the light-emitting surface of the display panel.

[0015] Optionally, the first retaining wall further includes a blocking portion, which is stacked on the partition portion, and the thickness of the blocking portion is greater than the thickness of the raised portion and the thickness of the partition portion.

[0016] Optionally, one side of the partition is provided with the first undercut opening, and a portion of the blocking portion is disposed on the raised portion and covers the other side of the partition.

[0017] Optionally, the display panel includes two first barrier walls, each of which includes a first sub-barrier wall and a second sub-barrier wall arranged adjacent to each other, with the second sub-barrier wall located on the side of the first sub-barrier wall away from the display area.

[0018] Optionally, the first undercut opening is provided on the side of the raised portion of the first sub-retaining wall near the second sub-retaining wall, and the first undercut opening is provided on the side of the raised portion of the second sub-retaining wall near the first sub-retaining wall.

[0019] Optionally, the display panel includes a plurality of partitions, the light-emitting common layer is interrupted at the partitions, at least one of the partitions is disposed on the side of the first sub-barrier wall near the display area, and a plurality of the partitions are disposed on the side of the second sub-barrier wall away from the display area; In the direction parallel to the light-emitting surface of the display panel, the distance between the partition portion of the first sub-block wall and the partition portion of the second sub-block wall is equal to the distance between two adjacent partition members.

[0020] Optionally, the display panel includes a substrate and a second barrier wall, the first barrier wall and the second barrier wall are disposed on the substrate, and the second barrier wall is located on the side of the first barrier wall away from the display area; The vertical distance between the top of the first barrier wall and the substrate is greater than the vertical distance between the top of the second barrier wall and the substrate.

[0021] Optionally, at least one side of the partition is provided with a second undercut opening, and the light-emitting common layer is broken at the second undercut opening.

[0022] Optionally, the distance by which the bottom of at least one side of the raised portion is inwardly recessed relative to the bottom of the bottom of at least one side of the partition portion on the same side is greater than the depth of the second bottom cut opening.

[0023] Optionally, the partition portion includes a first partition sub-part, a second partition sub-part, and a third partition sub-part stacked sequentially; In this configuration, at least one side of the second partition sub-part contracts inward relative to the side of the first partition sub-part and the third partition sub-part on the same side, to form the second undercut opening.

[0024] Optionally, the display panel includes a plurality of light-emitting common layers, wherein the plurality of light-emitting common layers include an organic common layer and a cathode layer disposed on the organic common layer.

[0025] According to a second aspect of this application, a display device is provided, including a display panel as described above.

[0026] In the display panel of this application embodiment, by shrinking at least one side of the raised portion of the first barrier inward relative to at least one side of the partition portion on the same side to form a first bottom cut opening, the light-emitting common layer is broken at the first bottom cut opening. This can prevent electrochemical corrosion of the light-emitting common layer in the non-display area, thereby improving the encapsulation performance of the display panel, avoiding display defects, and thus improving the reliability of the display panel.

[0027] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0029] Figure 1 A top view of a display panel provided for an embodiment of this application; Figure 2 The display panel provided for embodiments of this application is along Figure 1 The cross-sectional view along the A-A' direction shown; Figure 3 A schematic diagram of the structure of the first retaining wall in the display panel provided for an embodiment of this application; Figure 4 A schematic diagram of the film structure of the display panel located in the display area, provided for an embodiment of this application; Figure 5 A schematic diagram of another first retaining wall in a display panel provided for an embodiment of this application; Figure 6 Another display panel provided for embodiments of this application has an edge Figure 1 The cross-sectional view along the A-A' direction shown; Figure 7 A schematic diagram of the structure of a first retaining wall in another display panel provided for an embodiment of this application; Figures 8a to 8c A flowchart illustrating a method for providing a display panel according to an embodiment of this application; Figure 9 This is a schematic diagram of the structure of a display device according to an embodiment of this application. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0031] An embodiment of this application provides a display panel having a display area and a non-display area. The display panel includes a first barrier and at least one light-emitting common layer. The first barrier is located in the non-display area and extends along the edge of the display area. The light-emitting common layer is partially disposed on the first barrier. The first barrier includes a raised portion and a partition portion stacked on the raised portion. At least one side of the raised portion is recessed inward relative to at least one side of the partition portion on the same side to form a first bottom cut opening. The light-emitting common layer is broken at the first bottom cut opening.

[0032] In the embodiments of this application, by causing at least one side of the raised portion of the first barrier to contract inward relative to at least one side of the same side of the partition portion to form a first bottom cut opening, the continuous film formation of the light-emitting common layer on the side of the first barrier can be prevented, ensuring that the light-emitting common layer is broken at the first bottom cut opening. This can prevent electrochemical corrosion of the light-emitting common layer in the non-display area, thereby improving the encapsulation performance of the display panel, avoiding display defects, and thus improving the reliability of the display panel.

[0033] Combination Figure 1 As shown, Figure 1 The above view is a top view of a display panel provided in an embodiment of this application. The display panel 100 has a display area AA and a non-display area NA. The display area AA is the area used to display images, and the non-display area NA is the area used to place peripheral circuits or to transmit light.

[0034] In some embodiments, such as Figure 1 As shown, the non-display area NA includes a first non-display area NA1 and a second non-display area NA2. The display area AA is located around the first non-display area NA1, and the second non-display area NA is located around the display area AA.

[0035] In some embodiments, the first non-display area NA1 is an area for transmitting light, and the display panel 100 is provided with a light-transmitting hole H located in the first non-display area NA1. The light-transmitting hole H at least partially penetrates the display panel 100 in the thickness direction of the display panel to provide an optical path for penetrating the display panel.

[0036] In some embodiments, the second non-display area NA2 is an area for placing peripheral circuits and peripheral traces. For example, the display panel includes peripheral circuits and peripheral traces, which can be placed in the second non-display area NA2. The peripheral circuits may include, but are not limited to, gate drive circuits, electrostatic discharge protection circuits, multiplexing circuits, etc.

[0037] Combination Figure 1 and Figure 2 As shown, Figure 2 The display panel provided for embodiments of this application is along Figure 1 The cross-sectional view along the A-A' direction shown shows that the display panel 100 includes a first barrier 1 and at least one light-emitting common layer 2. The first barrier 1 is located in the first non-display area NA1 and extends along the edge of the display area AA. The light-emitting common layer 2 is partially disposed on the first barrier 1.

[0038] In some embodiments, the first non-display area NA1 may include an aperture sub-area and a transition sub-area (not shown in the figure), the transition sub-area being located between the aperture sub-area and the display area AA, and the first barrier 1 being disposed in the transition sub-area to separate the light-emitting common layer of the display area from the light-emitting common layer of the transition sub-area.

[0039] Combination Figure 2 and Figure 3 As shown, Figure 3 The first barrier wall in the display panel provided in the embodiment of this application is a structural schematic diagram. The first barrier wall 1 includes a raised part 11 and a partition part 12 stacked on the raised part 11. At least one side of the raised part 11 is recessed inward relative to at least one side of the partition part 12 on the same side to form a first bottom cut opening UC1. The light-emitting common layer 2 is broken at the first bottom cut opening UC.

[0040] In this embodiment, a first barrier 1 is disposed in a first non-display area NA1, which has a light-transmitting hole H that penetrates the display panel 100 in the thickness direction. By contracting at least one side of the raised portion 11 of the first barrier 1 inward relative to at least one side of the partition portion 12 on the same side to form a first undercut opening UC1, the light-emitting common layer 2 can be prevented from forming a film on the side of the raised portion 11, thereby causing the light-emitting common layer 2 to break at the raised portion 11 and severing the connection between the light-emitting common layer 2 of the display area AA and the light-emitting common layer 2 of the non-display area NA. This not only prevents electrochemical corrosion between the light-emitting common layer 2 of the non-display area NA and the overlapping metal film layer, but also cuts off the path for moisture to penetrate from the light-transmitting hole H through the light-emitting common layer 2 to the display area AA. Therefore, the encapsulation performance of the display panel can be improved, avoiding display defects and thus improving the reliability of the display panel.

[0041] In some embodiments, combined with Figure 2 and Figure 3 As shown, the raised portion 11 has a first side surface 11a and a second side surface 11b. The first side surface 11a is the side of the raised portion 11 that is away from the display area AA, and the second side surface 11b is the side of the raised portion 11 that is close to the display area AA. The partition portion 12 has a third side surface 12a and a fourth side surface 12b. The third side surface 12a is the side of the partition portion 12 that is away from the display area AA, and the fourth side surface 12b is the side of the partition portion 12 that is close to the display area AA.

[0042] The first side 11a and the third side 12a are located on the same side of the first barrier wall 1. The first side 11a and the third side 12a are not coplanar. The first side 11a is recessed inward relative to the third side 12a. The edge of the partition portion 12 away from the display area AA extends beyond the edge of the raised portion 11 away from the display area AA. The portion of the raised portion 11 and the portion of the partition portion 12 extending beyond the raised portion 11 define a first undercut opening UC1. The portion of the partition portion 12 extending beyond the raised portion 11 blocks the first side 11a of the raised portion 11, which can prevent the material of the light-emitting common layer 2 from being deposited on the first side 11a, so that the light-emitting common layer 2 is broken at the first undercut opening UC1.

[0043] Combination Figure 2 and Figure 3 As shown, the third side 12a of the partition portion 12 is tapered inward relative to the upper and lower portions in the middle portion in the thickness direction of the display panel to define the formation of the second undercut opening UC2. The second undercut opening UC2 can prevent the light-emitting common layer 2 from being continuously filmed on the third side 12a of the partition portion 12, so that the light-emitting common layer 2 is broken at the second undercut opening UC2.

[0044] In this embodiment, the second undercut opening UC2 and the first undercut opening UC1 are formed on the same side of the first baffle 1 and are spaced apart in the thickness direction of the display panel. The composite undercut opening structure formed by the first undercut opening UC1 and the second undercut opening UC2 can further ensure that the light-emitting common layer 2 is disconnected at the first undercut opening UC1 and the second undercut opening UC2, thereby improving the encapsulation performance of the display panel, avoiding display defects, and thus improving the reliability of the display panel.

[0045] In some embodiments, the distance by which the bottom of at least one side of the raised portion 11 is inwardly recessed relative to the bottom of at least one side of the partition portion 12 on the same side is greater than the thickness of the light-emitting common layer 2.

[0046] Combination Figure 2 and Figure 3 As shown, the distance by which the bottom of the first side 11a of the raised portion 11 contracts inward relative to the bottom of the third side 12a on the same side as the partition portion 12 is the first distance d1. The thickness of the portion of the light-emitting common layer 2 located on the first barrier wall 1 is the first thickness h1. The first distance d1 is greater than the first thickness h1. This can prevent the light-emitting common layer 2 from filling the space where the first side 11a of the raised portion 11 contracts inward relative to the third side 12a of the partition portion 12, so that a continuous film can be formed on the first side 11a and the third side 12a. This ensures that the light-emitting common layer 2 is broken at the first side 11a of the raised portion 11.

[0047] In some embodiments, the raised portion 11 is provided with insulation from the adjacent light-emitting common layer 2.

[0048] Combination Figure 2 and Figure 3The light-emitting common layer 2 is formed on the first barrier wall 1, and a portion of the light-emitting common layer 2 is formed on the substrate 10 on the side of the first barrier wall 1 away from the display area AA. The thickness of the portion of the light-emitting common layer 2 on the first barrier wall 1 is greater than or equal to the thickness of the portion of the light-emitting common layer 2 on the substrate 10. The portion of the light-emitting common layer 2 on the first barrier wall 1 and the portion on the substrate 10 are separated by the first undercut opening UC1 and the second undercut opening UC2. The raised portion 11 is insulated from the adjacent light-emitting common layer 2 on the substrate 10 on the right side to cut off the connection between the cathode of the non-display area NA and the cathode of the display area AA, preventing electrochemical corrosion of the light-emitting common layer in the non-display area. This improves the packaging performance of the display panel, avoids display defects, and enhances the reliability of the display panel.

[0049] In some embodiments, the thickness of the raised portion 11 is greater than the thickness of the light-emitting common layer 2.

[0050] Combination Figure 2 and Figure 3 As shown, the raised portion 11 and the adjacent light-emitting common layer 2 are formed on the same plane. Since the thickness of the raised portion 11 is greater than the thickness of the light-emitting common layer 2, the bottom height of the partition portion 12 is greater than the thickness of the light-emitting common layer 2, which prevents the light-emitting common layer 2 from overlapping with the partition portion 12, thereby ensuring that the raised portion 11 and the adjacent light-emitting common layer 2 are mutually insulated.

[0051] In some embodiments, the distance by which the bottom of at least one side of the raised portion 11 is inwardly recessed relative to the bottom of at least one side of the partition portion 12 on the same side is greater than the first depth d2 of the second bottom cut opening UC2.

[0052] Combination Figure 3 As shown, the partition portion 12 includes a first partition sub-part 121, a second partition sub-part 122, and a third partition sub-part 123 stacked sequentially. At least one side of the second partition sub-part 122 tapers inward relative to at least one side of the first partition sub-part 121 and the third partition sub-part 123 on the same side to form a second bottom-cut opening UC2. The depth of the second bottom-cut opening UC2 refers to the distance between the bottom of the side of the second partition sub-part 122 and the bottom of the side of the first partition sub-part 121. 2 has a first depth d2, and a first distance d1 is greater than the first depth d2. That is, the side of the first side 11a of the raised portion 11 is contracted inward relative to the side of the second partition portion 122 on the same side. This can prevent the light-emitting common layer 2 from filling the space where the first side 11a of the raised portion 11 is contracted inward relative to the third side 12a of the partition portion 12, so that a continuous film is formed on the first side 11a and the third side 12a. This ensures that the light-emitting common layer 2 is broken at the first side 11a of the raised portion 11.

[0053] In some embodiments, the first distance d1 inwardly contracted between the bottom of the first side 11a of the raised portion 11 and the bottom of the third side 12a on the same side as the partition portion 12 is greater than 0.3 micrometers and less than or equal to 1 micrometer. For example, the first distance d1 can be 0.32 micrometers, 0.35 micrometers, 0.4 micrometers, 0.5 micrometers, 0.7 micrometers, 0.9 micrometers, or 1 micrometer, etc.

[0054] In some embodiments, the first depth d2 of the second undercut opening UC2 is greater than or equal to 0.2 micrometers and less than or equal to 0.4 micrometers. For example, the first depth d2 can be 0.2 micrometers, 0.25 micrometers, 0.3 micrometers, 0.35 micrometers, or 0.4 micrometers, etc.

[0055] In some embodiments, the display panel includes an organic material layer, and the raised portion 11 is disposed in the same layer as the organic material layer and is made of the same material.

[0056] In the actual manufacturing process, the raised portion 11 and the organic material layer 108 can be fabricated simultaneously using the same process. The raised portion 11 can also be regarded as part of the organic material layer 108. By using the process of fabricating the raised portion 11 using the organic material layer 108, it is possible to ensure that the light-emitting common layer 2 is disconnected at the first bottom cut opening UC1 and the second bottom cut opening UC2 without increasing the film layer structure and process of the display panel. This improves the encapsulation performance of the display panel, avoids display defects, and thus improves the reliability of the display panel.

[0057] In some embodiments, the display panel includes at least one source-drain layer disposed on an organic material layer.

[0058] In some embodiments, combined with Figure 4 As shown, Figure 4 This is a schematic diagram of the film structure of the display panel located in the display area according to an embodiment of this application. The display panel includes a substrate 10, an active layer 101, a first gate insulating layer 102, a first gate layer 103, a second gate insulating layer 104, a second gate layer 105, an interlayer dielectric layer 106, a first source-drain layer 107, an organic material layer 108, a second source-drain layer 109, a planarization layer 110, an anode layer 111, a pixel definition layer 112, a support layer 113, a light-emitting common layer 2, and an encapsulation layer 114, which are stacked sequentially. The organic material layer 108 is disposed on the first source-drain layer 107 and the interlayer dielectric layer 106, and the second source-drain layer 109 is disposed on the organic material layer 108.

[0059] The organic material layer 108 is made of organic materials. Organic materials have fluidity, which can improve the flatness of the organic material layer 108 so as to facilitate the subsequent preparation of the source / drain layer and the light-emitting layer. The organic material layer 108 can also be regarded as the first planarization layer, and the planarization layer 110 can be regarded as the second planarization layer. The raised part 11 can be prepared simultaneously using the process of the first planarization layer.

[0060] It should be noted that, Figure 4 This illustration only shows the film layer structure of a display panel provided in one embodiment and does not represent the film layer structure of a display panel in actual applications. In other embodiments, the display panel may also have only one source / drain layer, which may be disposed above the organic material layer, and the organic material layer may be regarded as the planarization layer of the display panel.

[0061] In some embodiments, combined with Figure 2 and Figure 4 As shown, the light-emitting common layer 2 includes an organic common layer 21 and a cathode layer 22 disposed on the organic common layer 21. The organic common layer 21 may include, but is not limited to, a hole injection layer, a hole transport layer, an electron transport layer, and an electron injection layer. The display panel also includes an organic light-emitting material layer, which is disposed between the hole transport layer and the electron transport layer and located within the pixel opening defined by the pixel definition layer.

[0062] In some embodiments, the thickness of the raised portion 11 is less than the thickness of the portion of the organic material layer 108 located in the display area AA.

[0063] Combination Figure 3 and Figure 4 As shown, the raised portion 11 has a second thickness h2, and the portion of the organic material layer 108 located in the display area AA has a third thickness h3, where the second thickness h2 is less than the third thickness h3. It should be noted that if the thickness of the raised portion 11 is too small, the light-emitting common layer 2 will fill the first undercut opening UC1 defined between the first side surface 11a of the raised portion 11 and the partition portion 12, and will form a continuous film at the first side surface 11a of the raised portion 11 and the third side surface 12a of the partition portion 12, making it impossible for the light-emitting common layer 2 to break at the first undercut opening UC1. If the thickness of the raised portion 11 is too large, it will be detrimental to the continuous film formation of the encapsulation layer 114 at the second undercut opening UC2, increasing the risk of cracks in the encapsulation layer 114 and affecting the encapsulation performance of the display panel.

[0064] This embodiment reduces the thickness of the raised portion 11 so that its thickness is less than that of the organic material layer 108. This not only ensures that the light-emitting common layer 2 is disconnected at the first bottom cut opening UC1, but also facilitates the continuous film formation of the encapsulation layer 114 at the second bottom cut opening UC2, thereby improving the encapsulation performance of the display panel and enhancing its reliability.

[0065] In some embodiments, the ratio of the thickness of the raised portion 11 to the thickness of the portion of the organic material layer 108 located in the display area AA is greater than or equal to 3:25 and less than or equal to 2:3. For example, the ratio of the second thickness h2 to the third thickness h3 can be 3:25, 1:5, 2:5, 1:2, or 2:3, etc.

[0066] In some embodiments, the thickness of the raised portion 11 is greater than or equal to 0.3 micrometers and less than or equal to 1 micrometer. For example, the thickness of the raised portion 11 can be 0.3 micrometers, 0.5 micrometers, 0.7 micrometers, 0.9 micrometers, or 1 micrometer, etc.

[0067] In some embodiments, the thickness of the organic material layer 108 is greater than or equal to 1.5 micrometers and less than or equal to 2.5 micrometers. For example, the thickness of the organic material layer 108 can be 1.5 micrometers, 1.7 micrometers, 1.9 micrometers, 2 micrometers, 2.2 micrometers, 2.4 micrometers, or 2.5 micrometers, etc.

[0068] In some embodiments, such as Figure 3 As shown, the tangent at any point on the inwardly tapering side of the raised portion 11 forms a first angle α1 with the reference plane. This first angle α1 is greater than or equal to 50 degrees and less than or equal to 80 degrees, and the reference plane is parallel to the light-emitting surface of the display panel. For example, the first angle α1 can be 50 degrees, 55 degrees, 60 degrees, 65 degrees, 70 degrees, 75 degrees, or 80 degrees, etc. This ensures that the light-emitting common layer 2 is disconnected at the first bottom cut-out UC1, and also facilitates continuous film formation of the encapsulation layer 114 at the first bottom cut-out UC1, thereby improving the encapsulation performance and reliability of the display panel.

[0069] In some embodiments, combined with Figure 2 and Figure 3 As shown, the second side 11b of the raised portion 11 extends outward relative to the fourth side 12b of the partition portion 12. The fourth side 12b of the partition portion 12 is a continuously arranged vertical side or an inclined side, that is, neither the second side 11b of the raised portion 11 nor the fourth side 12b of the partition portion 12 has a bottom cut opening.

[0070] In some embodiments, such as Figure 4 As shown, the encapsulation layer 114 includes a first inorganic encapsulation layer 1141, an organic encapsulation layer 1142, and a second inorganic encapsulation layer 1143 stacked sequentially.

[0071] In some embodiments, combined with Figure 2 and Figure 3As shown, the first barrier 1 also includes a blocking portion 13, which is stacked on the partition portion 12. The thickness of the blocking portion 13 is greater than the thickness of the raised portion 11 and the thickness of the partition portion 12. By providing a blocking portion 13 with a larger thickness on the partition portion 12, the organic encapsulation material in the encapsulation layer 114 can be prevented from overflowing, thereby further improving the encapsulation effect of the display panel.

[0072] In some embodiments, a second undercut opening UC2 is provided on one side of the partition portion 12, and a portion of the blocking portion 13 is disposed on the raised portion 11 and covers the other side of the partition portion 12. By using the blocking portion 13 to cover the other side of the partition portion 12, the partition portion 12 can be insulated and separated from the light-emitting common layer 2, avoiding the partition portion 12 from overlapping with the light-emitting common layer 2, so as to prevent electrochemical corrosion of the light-emitting common layer 2 of the non-display area NA.

[0073] like Figure 3 As shown, the third side 12a of the partition portion 12 is provided with a second undercut opening UC2, the second side 11b of the raised portion 11 extends beyond the fourth side 12b of the partition portion 12, and a portion of the blocking portion 13 is disposed on the portion of the raised portion 11 that extends beyond the partition portion 12 and covers the fourth side 12b of the partition portion 12. In this way, the partition portion 12 can be insulated and separated from the light-emitting common layer 2, and the partition portion 12 and the light-emitting common layer 2 can be prevented from overlapping, so as to prevent electrochemical corrosion of the light-emitting common layer 2 of the non-display area NA.

[0074] In some embodiments, combined with Figure 3 and Figure 4 As shown, the blocking part 13 includes a first blocking sub-part 131, a second blocking sub-part 132 and a third blocking sub-part 133 stacked in sequence. The first blocking sub-part 131 is disposed on the same layer as the planarization layer 110 and has the same material. The second blocking sub-part 132 is disposed on the same layer as the pixel definition layer 112 and has the same material. The third blocking sub-part 133 is disposed on the same layer as the support layer 113 and has the same material.

[0075] In some embodiments, such as Figure 2 As shown, the display panel also includes a second barrier 4, which is disposed on the side of the first barrier 1 away from the display area AA. The second barrier 4 extends along the edge of the display area AA and can be used to prevent the organic encapsulation material in the encapsulation layer 114 from overflowing.

[0076] In some embodiments, the vertical distance between the top of the first barrier 1 and the substrate 10 is greater than the vertical distance between the top of the second barrier 4 and the substrate 10.

[0077] like Figure 2As shown, the vertical distance between the top of the first barrier 1 and the substrate 10 is the fifth distance d5, which is the height of the first barrier 1 itself. The vertical distance between the top of the second barrier 4 and the substrate 10 is the sixth distance d6, which is the height of the second barrier 4 itself. By adding a raised portion 11 and a partition portion 12 inside the first barrier 1, it is not only ensured that the light-emitting common layer 2 is disconnected at the first barrier 1, but also that the height of the first barrier 1 is greater than the height of the second barrier 4. In this way, the organic encapsulation material in the encapsulation layer 114 can be confined to the side of the first barrier 1 near the display area AA, preventing the organic packaging material from overflowing, thereby further improving the encapsulation effect of the display panel.

[0078] In some embodiments, combined with Figure 2 and Figure 3 As shown, the display panel includes multiple partitions 3. At least one partition 3 is disposed on the side of the first barrier 1 near the display area AA, and multiple partitions 3 are disposed on the side of the first barrier 1 away from the display area AA, and are located between the first barrier 1 and the second barrier 4. The side of the partition 3 near the display area AA and the side away from the display area AA are provided with a third bottom cut opening UC3. The light-emitting common layer 2 is broken at the third bottom cut opening UC3 of the partition 3. In this way, the light-emitting common layer 2 of the non-display area NA can be divided into multiple mutually disconnected parts. This not only prevents the electrical signal of the light-emitting common layer 2 of the display area AA from being transmitted to the light-emitting common layer 2 of the non-display area NA, and avoids the electrochemical corrosion between the light-emitting common layer 2 of the non-display area NA and the adjacent metal film layer, but also cuts off the path of moisture in the external environment to enter the display area AA through the light-emitting common layer 2 of the non-display area NA, thereby further improving the encapsulation effect of the display panel.

[0079] In some embodiments, such as Figure 3 As shown, the partition 3 includes a fourth partition sub-part 31, a fifth partition sub-part 32 and a sixth partition sub-part 33 stacked in sequence. The side of the fifth partition sub-part 32 is recessed inward relative to the fourth partition sub-part 31 and the partition sub-part 33 to define the formation of a third undercut opening UC3.

[0080] In some embodiments, the partition 12, the partition 3, and the second source-drain layer 109 are disposed in the same layer and are made of the same material. The partition 12, the partition 3, and the second source-drain layer 109 can be fabricated simultaneously using the same process. Therefore, without increasing the film layer structure and process of the display panel, it is possible to ensure that the light-emitting common layer 2 is disconnected at the first barrier 1 and the partition 3, thereby improving the encapsulation performance of the display panel, avoiding display defects, and thus improving the reliability of the display panel.

[0081] In some embodiments, the second source / drain layer 109 is a three-layer metal thin film structure formed by sequentially stacking at least two metal materials. The metal materials may include, but are not limited to, metals with good electrical conductivity such as titanium, aluminum, copper, molybdenum, and nickel. For example, the second source / drain layer 109 is a three-layer metal thin film structure formed by sequentially stacking titanium, aluminum, and titanium.

[0082] In some embodiments, combined with Figure 3 As shown, the distance between the top of the partition portion 12 and the substrate 10 is greater than the distance between the top of the partition member 3 and the substrate 10.

[0083] In some embodiments, the first barrier 1 may be disposed in the second non-display area NA2. Specifically, the substrate 10 of the second non-display area NA2 is provided with the first barrier 1, the second barrier 4 and a plurality of partitions 3. The second barrier 4 is located on the side of the first barrier 1 away from the display area AA, at least one partition 3 is located on the side of the first barrier 1 close to the display area AA, and the plurality of partitions 3 are located between the first barrier 1 and the second barrier 4. This allows the light-emitting common layer 2 of the second non-display area NA2 to be disconnected at the first undercut opening UC1 and the second undercut opening UC2 of the first barrier 1, thereby improving the encapsulation effect at the second non-display area NA2.

[0084] In some embodiments, the first non-display area NA1 and the second non-display area NA2 may be provided with a first barrier 1 at the same time, which can improve the encapsulation effect of the display panel at the first non-display area NA1 and the second non-display area NA2.

[0085] like Figure 5 As shown, Figure 5 This is a schematic diagram of another type of first retaining wall in a display panel provided as an embodiment of this application. Its structure is similar to... Figure 3 The structure of the first barrier in the display panel shown is roughly the same, except that the second side 11b of the raised portion 11 is recessed inward relative to the fourth side 12b of the partition portion 12 to form a first undercut opening UC1, and the fourth side 12b of the partition portion 12 is provided with a second undercut opening UC2. That is, the side of the raised portion 11 near the display area AA and the side away from the display area AA are both defined by the partition portion 12 to form the first undercut opening UC1, and the side of the partition portion 12 near the display area AA and the side away from the display area AA are both formed with the second undercut opening UC2. This ensures that the light-emitting common layer 2 is disconnected at both the side of the first barrier 1 near the display area AA and the side away from the display area AA, thereby further improving the encapsulation performance, avoiding display defects, and thus further improving the reliability of the display panel.

[0086] Combination Figure 6 and Figure 7 As shown, Figure 6Another display panel provided for embodiments of this application has an edge Figure 1 The cross-sectional view along the A-A' direction shown. Figure 7 A schematic diagram of the structure of the first barrier wall in another display panel provided in an embodiment of this application, the structure of which is similar to... Figures 2 to 4 The structures of the display panels shown are roughly the same, the difference being that the display panel includes two first barriers 1, the two first barriers 1 being a first sub-barrier 1a and a second sub-barrier 1b respectively. The first sub-barrier 1a and the second sub-barrier 1b are adjacent and spaced apart. The second sub-barrier 1b is located on the side of the first sub-barrier 1a away from the display area AA. Both the first sub-barrier 1a and the second sub-barrier 1b are arranged along the edge of the display area.

[0087] At least one side of the raised portion 11 of the first sub-wall 1a is recessed inward relative to at least one side of the partition portion 12 on the same side. At least one side of the partition portion 12 is provided with a second bottom cut opening UC2, and the light-emitting common layer 2 is disconnected at the second bottom cut opening UC2. At least one side of the raised portion 11 of the second sub-wall 1b is recessed inward relative to at least one side of the partition portion 12 on the same side. At least one side of the partition portion 12 is provided with a second bottom cut opening UC2, and the light-emitting common layer 2 is disconnected at the second bottom cut opening UC2. By setting two first barrier walls 1 in the non-display area NA, and making the two first barrier walls 1 adjacent and spaced apart, not only can the two first barrier walls 1 block the organic encapsulation material in the encapsulation layer 114 to further reduce the risk of organic encapsulation material spillage, but the light-emitting common layer 2 can also be divided into more disconnected parts to prevent electrochemical corrosion between the light-emitting common layer 2 of the non-display area NA and the overlapping metal film layer, and cut off the path of moisture in the external environment to enter the display area AA through the light-emitting common layer 2 of the non-display area NA, thereby further improving the encapsulation effect of the display panel.

[0088] In some embodiments, combined with Figure 6 and Figure 7As shown, the raised portion 11 of the first sub-retaining wall 1a has a first bottom cut opening UC1 on the side near the second sub-retaining wall 1b, and the raised portion 11 of the second sub-retaining wall 1b has a first bottom cut opening UC1 on the side near the first sub-retaining wall 1a. The first bottom cut opening UC1 of the raised portion 11 is disposed opposite to the first bottom cut opening UC1 of the raised portion 11 of the second sub-block 1b, so that the light-emitting common layer 2 between the first sub-block 1a and the second sub-block 1b is disconnected at the first bottom cut opening UC1 of the first sub-block 1a and the first bottom cut opening UC1 of the second sub-block 1b. A portion of the light-emitting common layer 2 is formed on the substrate 10 between the first sub-block 1a and the second sub-block 1b. The light-emitting common layer 2 between the first sub-block 1a and the second sub-block 1b is insulated from the partition portion 12 of the first sub-block 1a and the second sub-block 1b. In this way, the connection between the light-emitting common layer 2 of the non-display area NA and the light-emitting common layer of the display area AA can be cut off, preventing electrochemical corrosion of the light-emitting common layer of the non-display area NA and other film layers, thereby improving the encapsulation effect of the display panel.

[0089] In this embodiment, the first inorganic encapsulation layer and the second inorganic encapsulation layer are continuously disposed at the first sub-barrier 1a and the second sub-barrier 1b to ensure the encapsulation effect of the display panel.

[0090] In some embodiments, combined with Figure 6 As shown, the display panel includes multiple partitions 3. At least one partition 3 is disposed on the side of the first sub-wall 1a close to the display area AA, and multiple partitions 3 are disposed on the side of the second sub-wall 1b away from the display area AA, and are located between the second sub-wall 1b and the second sub-wall 4. No partition 3 is disposed between the first sub-wall 1a and the second sub-wall 1b. In some embodiments, in the direction from the display area AA to the non-display area NA, the distance between the partition portion 12 of the first sub-wall 1a and the partition portion 12 of the second sub-wall 1b is equal to the distance between two adjacent partition members 3.

[0091] Combination Figure 6 and Figure 7As shown, in the direction from the display area AA to the non-display area NA, there is a third distance d3 between the partition portion 12 of the first sub-block 1a and the partition portion 12 of the second sub-block 1b, and a fourth distance d4 between two adjacent partition members 3. The third distance d3 and the fourth distance d4 are equal. It should be noted that if the distance between the partition portion 12 of the first sub-block 1a and the partition portion 12 of the second sub-block 1b is too large, the width of the non-display area NA will increase, resulting in a decrease in the screen ratio; if the distance between the partition portion 12 of the first sub-block 1a and the partition portion 12 of the second sub-block 1b is too small, the light-emitting common layer 2 cannot be disconnected at the first sub-block 1a and the second sub-block 1b. By making the distance between the partition portion 12 of the first sub-block 1a and the partition portion 12 of the second sub-block 1b equal to the distance between two adjacent partition members 3, the light-emitting common layer 2 can be ensured to be disconnected at the first sub-block 1a and the second sub-block 1b without affecting the screen ratio, thereby improving the encapsulation effect of the display panel.

[0092] In practical applications, the third distance d3 and the fourth distance d4 can also be different, as long as the difference between the two is within the process error range, which can reduce the requirements for process accuracy.

[0093] In some embodiments, the vertical distance between the top of the first sub-wall 1a and the substrate 10 is equal to the vertical distance between the top of the second sub-wall 1b and the substrate 10, that is, the height of the first sub-wall 1a is equal to the height of the second sub-wall 1b.

[0094] Combination Figures 8a to 8c As shown, Figures 8a to 8c A flowchart illustrating a method for providing a display panel according to an embodiment of this application, to... Figure 6 Taking the display panel shown as an example, the manufacturing method of the display panel includes the following steps: Step S1, as follows Figure 8a As shown, an organic material layer is formed on the substrate 10, and the organic material is patterned to form an organic material layer (not shown in the figure) and a padding layer 1110. Step S2, as follows Figure 8a As shown, a conductive material is deposited on an organic material layer, and the conductive material is patterned to form a partition portion 12 located on a pad layer and a plurality of partition members 3 located on a substrate 10. Step S3, as follows Figure 8b As shown, the padding layer is patterned using an ashing process to remove part of the padding layer and form a padding part 11. The side of the padding part 11 is tapered inward relative to the side of the partition part 12 to form a first undercut opening UC1. Step S4, as follows Figure 8cAs shown, a blocking portion 13 is formed on the partition portion 12 to form a first barrier 1, and a second barrier 4 is formed on the substrate 10 on the side of the first barrier 1 away from the display area AA; the partition portion 12 and the partition member 3 are side-cut, and a second undercut opening UC2 is formed on the side of the partition portion 12, and a third undercut opening UC3 is formed on the side of the partition member 3. Step S5: A light-emitting common layer and an encapsulation layer (not shown in the figure) are sequentially formed on the substrate 10 and the blocking portion 13. The light-emitting common layer is broken at the first undercut opening UC1, the second undercut opening UC2 and the third undercut opening UC3. The encapsulation layer is continuously formed at the first undercut opening UC1, the second undercut opening UC2 and the third undercut opening UC3.

[0095] It should be noted that, Figures 8a to 8c This diagram mainly illustrates the fabrication process of the first barrier 1, and does not show the complete fabrication process of the display panel. Before step S1, an active layer, a first gate insulating layer, a first gate layer, a second gate insulating layer, a second gate layer, an interlayer dielectric layer, and a first source / drain layer should be formed on the substrate. Figures 8a to 8c The process of preparing the above-mentioned film layer can be referred to existing display panels, and will not be elaborated here.

[0096] According to the display panel provided in the embodiments of this application, the embodiments of this application also provide a display device, such as... Figure 9 As shown, Figure 9 This is a schematic diagram of the structure of a display device according to an embodiment of this application. The display device 1000 includes a display panel 100 and a housing 200. The display panel 100 is disposed on the housing 200. The display panel 100 can be any of the display panels provided in the above embodiments to achieve the same or similar functions in the display device provided in the embodiments of this application.

[0097] The beneficial effects of the embodiments of this application are as follows: This application provides a display panel and a display device. The display panel includes a first barrier wall and at least one light-emitting common layer. The first barrier wall is located in a non-display area and extends along the edge of the display area. The light-emitting common layer is partially disposed on the first barrier wall. The first barrier wall includes a raised portion and a partition portion stacked on the raised portion. By causing at least one side of the raised portion of the first barrier wall to contract inward relative to at least one side of the partition portion on the same side to form a first bottom cut opening, the continuous film formation of the light-emitting common layer on the side of the first barrier wall can be prevented, ensuring that the light-emitting common layer is broken at the first bottom cut opening. This can prevent electrochemical corrosion of the light-emitting common layer in the non-display area, thereby improving the encapsulation performance of the display panel, avoiding display defects, and thus improving the reliability of the display panel.

[0098] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0099] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0100] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0101] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A display panel, characterized in that, The display panel includes a display area and a non-display area. A first retaining wall is located in the non-display area and extends along the edge of the display area; and At least one light-emitting common layer is partially disposed on the first retaining wall; The first retaining wall includes a raised portion and a partition portion stacked on the raised portion. At least one side of the raised portion is recessed inward relative to at least one side of the partition portion on the same side to form a first undercut opening. The light-emitting common layer is broken at the first undercut opening.

2. The display panel as described in claim 1, characterized in that, The distance by which the bottom of at least one side of the raised portion is inwardly contracted relative to the bottom of the bottom of at least one side of the partition portion on the same side is greater than the thickness of the light-emitting common layer.

3. The display panel as described in claim 1, characterized in that, The partition portion is insulated from the adjacent light-emitting common layer.

4. The display panel as described in claim 1, characterized in that, The thickness of the raised portion is greater than the thickness of the light-emitting common layer.

5. The display panel as described in claim 1, characterized in that, The display panel includes an organic material layer, and the raised portion is disposed in the same layer as the organic material layer and is made of the same material.

6. The display panel as described in claim 5, characterized in that, The thickness of the raised portion is less than the thickness of the portion of the organic material layer located in the display area.

7. The display panel as described in claim 6, characterized in that, The ratio of the thickness of the raised portion to the thickness of the portion of the organic material layer located in the display area is greater than or equal to 3:25 and less than or equal to 2:

3.

8. The display panel as described in claim 5, characterized in that, The display panel includes at least one source-drain layer, and the at least one source-drain layer is disposed on the organic material layer.

9. The display panel as described in any one of claims 1 to 8, characterized in that, The angle between the tangent at any point on at least one side of the raised portion and the reference plane is greater than or equal to 50 degrees and less than or equal to 80 degrees, and the reference plane is parallel to the light-emitting surface of the display panel.

10. The display panel as claimed in any one of claims 1 to 8, characterized in that, The first retaining wall also includes a blocking part, which is stacked on the partition part, and the thickness of the blocking part is greater than the thickness of the raised part and the thickness of the partition part.

11. The display panel as claimed in claim 10, characterized in that, One side of the partition is provided with the first bottom cut opening, and a portion of the blocking portion is disposed on the raised portion and covers the other side of the partition.

12. The display panel as claimed in any one of claims 1 to 8, characterized in that, The display panel includes two first barrier walls, each of which includes a first sub-barrier wall and a second sub-barrier wall arranged adjacent to each other, with the second sub-barrier wall located on the side of the first sub-barrier wall away from the display area.

13. The display panel as claimed in claim 12, characterized in that, The first sub-retaining wall has a first bottom cut opening on the side of the raised portion near the second sub-retaining wall, and the second sub-retaining wall has a first bottom cut opening on the side of the raised portion near the first sub-retaining wall.

14. The display panel as claimed in claim 13, characterized in that, The display panel includes multiple partitions, the light-emitting common layer is interrupted at the partitions, at least one of the partitions is disposed on the side of the first sub-barrier wall near the display area, and multiple of the partitions are disposed on the side of the second sub-barrier wall away from the display area; In the direction parallel to the light-emitting surface of the display panel, the distance between the partition portion of the first sub-block wall and the partition portion of the second sub-block wall is equal to the distance between two adjacent partition members.

15. The display panel as claimed in any one of claims 1 to 8, characterized in that, The display panel includes a substrate and a second barrier wall, the first barrier wall and the second barrier wall are disposed on the substrate, and the second barrier wall is located on the side of the first barrier wall away from the display area; The vertical distance between the top of the first barrier wall and the substrate is greater than the vertical distance between the top of the second barrier wall and the substrate.

16. The display panel as claimed in any one of claims 1 to 8, characterized in that, The partition portion has a second undercut opening on at least one side, and the light-emitting common layer is broken at the second undercut opening.

17. The display panel as claimed in claim 16, characterized in that, The distance by which the bottom of at least one side of the raised portion is inwardly recessed relative to the bottom of at least one side of the partition portion on the same side is greater than the depth of the second bottom cut opening.

18. The display panel as claimed in claim 16, characterized in that, The partition section includes a first partition sub-section, a second partition sub-section, and a third partition sub-section stacked in sequence; In this configuration, at least one side of the second partition sub-part contracts inward relative to at least one side of the first partition sub-part and the third partition sub-part on the same side, to form the second undercut opening.

19. The display panel as claimed in any one of claims 1 to 8, characterized in that, The display panel includes a plurality of light-emitting common layers, the plurality of light-emitting common layers including an organic common layer and a cathode layer disposed on the organic common layer.

20. A display device, characterized in that, Includes the display panel as described in any one of claims 1 to 19.

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