Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device, and relates to the technical field of display. The display panel comprises a display area and a non-display area surrounding the display area, the non-display area comprises a near display area and a dam area, and the near display area and the dam area are sequentially arranged in the direction from the display area to the non-display area. The display panel further comprises a substrate, a packaging layer and a retaining wall, the packaging layer is located on one side of the substrate, the packaging layer comprises a first inorganic packaging layer and an organic packaging layer, the organic packaging layer is located on the side, away from the substrate, of the first inorganic packaging layer, and the organic packaging layer is located in the display area and the near display area. The retaining wall is located on one side, away from the substrate, of the first inorganic packaging layer and located in the dam area. The retaining wall of the display panel is arranged on the side, away from the substrate, of the first inorganic packaging layer, the influence of the lap joint metal wires on the substrate on the retaining wall can be avoided, the distance between the display area and the dam area is reduced, and therefore the frame of the display panel is reduced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a method for preparing the same, and a display device. Background Art

[0002] With the advancement of terminal display technology such as mobile phones, active-matrix organic light-emitting diode (AMOLED) displays have gradually become mainstream. People have also put forward requirements for AMOLED mobile phone displays such as flexibility, full screen, and ultra-narrow borders, so the borders of mobile phone display screens are required to be smaller and smaller.

[0003] However, the compression space of the frame of the current display panel is limited. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a display panel and a method for manufacturing the same, and a display device to solve the problem of limited compression space of a display panel frame in the prior art.

[0005] In a first aspect, the present application provides a display panel, the display panel includes a display area and a non-display area surrounding the display area, the non-display area includes a near-display area and a dam area, and in the direction from the display area to the non-display area, the near-display area and the dam area are arranged in sequence. The display panel also includes a substrate, an encapsulation layer and a retaining wall, the encapsulation layer is located on one side of the substrate, the encapsulation layer includes a first inorganic encapsulation layer and an organic encapsulation layer, the organic encapsulation layer is located on a side of the first inorganic encapsulation layer away from the substrate, and the organic encapsulation layer is located in the display area and the near-display area, and the retaining wall is located on a side of the first inorganic encapsulation layer away from the substrate and in the dam area.

[0006] In one embodiment, in a direction perpendicular to the substrate, a size of the retaining wall is greater than a size of the organic encapsulation layer; preferably, in a direction perpendicular to the substrate, a difference between a size of the retaining wall and a size of the organic encapsulation layer is greater than or equal to 1 micron; preferably, the organic encapsulation layer is flush on a side facing away from the substrate.

[0007] In one embodiment, the substrate includes a substrate and an inorganic layer, the inorganic layer is located between the substrate and the encapsulation layer, and the first inorganic encapsulation layer is in contact with the inorganic layer.

[0008] In one embodiment, the encapsulation layer also includes a second inorganic encapsulation layer, which is located on the side of the organic encapsulation layer and the retaining wall away from the first inorganic encapsulation layer; preferably, the non-display area also includes an encapsulation area, which is located on the side of the dam area away from the near display area, and in the encapsulation area, the first inorganic encapsulation layer and the second inorganic encapsulation layer are in contact.

[0009] In one embodiment, the non-display area also includes a packaging area, which is located on the side of the dam area away from the near display area, and the side of the substrate located in the packaging area close to the packaging layer is an uneven surface; preferably, the display panel is provided with a plurality of protruding structures, the plurality of protruding structures are located between the inorganic layer and the packaging layer, and the protruding structures are located in the packaging area; preferably, the inorganic layer located in the packaging area is provided with a plurality of grooves and / or protrusions on the side close to the packaging layer.

[0010] In one embodiment, the non-display area also includes a cutting area, and in the direction from the display area to the non-display area, the near-display area, the dam area, the packaging area and the cutting area are arranged in sequence; preferably, a partition structure is provided on the side of the substrate located in the cutting area close to the packaging layer.

[0011] In one embodiment, the display panel further includes a pixel definition layer, which is located between the substrate and the encapsulation layer and in the display area, and the pixel definition layer includes a pixel definition portion and a pixel opening formed by the pixel definition portion; preferably, the display panel further includes a light-emitting unit, which is located in the pixel opening.

[0012] In one embodiment, the display panel also includes an auxiliary retaining wall, which is arranged on the same layer as the retaining wall, and the auxiliary retaining wall is located in the display area; preferably, the orthographic projection of the auxiliary retaining wall on the substrate is located within the orthographic projection of the pixel definition portion on the substrate; preferably, the retaining wall is annular, and the retaining wall surrounds the display area; preferably, there are multiple auxiliary retaining walls, and the multiple auxiliary retaining walls are independently arranged.

[0013] The second aspect of the present application provides a method for preparing a display panel, wherein the display panel includes a display area and a non-display area surrounding the display area, wherein the non-display area includes a near-display area and a dam area, and the near-display area and the dam area are arranged in sequence in the direction from the display area to the non-display area. The method includes: preparing a first inorganic encapsulation layer on a substrate; preparing an organic material layer on the first inorganic encapsulation layer, and patterning the organic material layer to form a retaining wall, wherein the retaining wall is located in the dam area; preparing an organic encapsulation layer on the first inorganic encapsulation layer, wherein the organic encapsulation layer is located in the display area and the near-display area.

[0014] A third aspect of the present application provides a display device, comprising the above-mentioned display panel.

[0015] According to the display panel provided by the embodiment of the present application, by setting a retaining wall, the organic encapsulation layer can be prevented from overflowing to the outside of the display panel. Furthermore, compared with the solution of forming a retaining wall by a substrate in the prior art, the present application sets the retaining wall on the side of the first inorganic encapsulation layer away from the substrate. The present application can avoid the influence of the overlapping metal wire on the substrate on the retaining wall, reduce the distance between the display area and the dam area, thereby reducing the frame of the display panel, and can also break through the height limit of the retaining wall, without setting a buffer area of ​​the organic encapsulation layer, further reducing the frame of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of a display panel in the related art.

[0018] Figure 2 is a top view of the display panel provided in an embodiment of the present application.

[0019] Figure 3 It is a schematic diagram of the cross-sectional structure of the display panel provided in the first embodiment of the present application.

[0020] Figure 4 It is a schematic diagram of the cross-sectional structure of a display panel located in a packaging area provided in the second embodiment of the present application.

[0021] Figure 5 It is a schematic diagram of the cross-sectional structure of a display panel located in a packaging area provided in the third embodiment of the present application.

[0022] Figure 6 It is a schematic diagram of the cross-sectional structure of a display panel located in a packaging area provided in the fourth embodiment of the present application.

[0023] Figure 7 It is a schematic cross-sectional structure diagram of a display panel located in a packaging area provided in the fifth embodiment of the present application.

[0024] Figure 8 It is a top view of the display panel provided in the sixth embodiment of the present application.

[0025] Fig. 9 It is a top view of the display panel provided in the seventh embodiment of the present application.

[0026] Fig.10 yes Figure 8 A schematic cross-sectional structure diagram of a display area of ​​a display panel is shown.

[0027] Fig.11 It is a schematic diagram of the process of the method for preparing a display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] With the advancement of terminal display technology such as mobile phones, active-matrix organic light-emitting diode (AMOLED) displays have gradually become mainstream. People have also put forward requirements for AMOLED mobile phone displays such as flexibility, full screen, and ultra-narrow borders, so the borders of mobile phone display screens are required to be smaller and smaller.

[0029] "Full screen" technology has continued to develop in the past two years. In order to increase the proportion of display area of ​​consumer electronics, various designs have evolved, such as bangs screen, water drop screen, perforated screen, under-screen camera and other solutions. As of the under-screen camera technology, the display screen in mobile phones and tablets has been the most complete, and the screen-to-body ratio is currently the largest; if the display area ratio needs to be further increased, then compressing the screen frame is an effective direction. In this way, when the screen size remains unchanged, the smaller the frame, the larger the display area.

[0030] In the related art, the edge circuit or fan-out area of ​​the display panel is usually integrated into the display area to reduce the border of the display panel. Figure 1 As shown, Figure 1 Schematic diagram of the cross-sectional structure of a display panel in the related art. Figure 1 As shown, the display panel 100 includes a display area AA and a non-display area NA surrounding the display area AA, the non-display area NA includes a near display area 101, a dam area 102, a packaging area 103 and a cutting area 104, and in the direction X from the display area AA to the non-display area NA, the near display area 101, the dam area 102, the packaging area 103 and the cutting area 104 are arranged in sequence. The display panel 100 also includes a substrate 10 and a packaging layer 20, the packaging layer 20 includes at least a first inorganic packaging layer 21 and an organic packaging layer 22, and a dam structure 90 is formed inside the substrate 10 to prevent the organic packaging layer 22 from overflowing to the outside of the display panel 100. In the related art, the near display area 101 of the display panel 100 is mainly compressed, while the dam area 102, the packaging area 103 and the cutting area 104 still adopt a conventional design structure, so the related art has limited space for compressing the frame of the display panel 100, generally up to 30% of the frame width.

[0031] In view of this, the present application provides a display panel and a method for preparing the same, and a display device, which can prevent the organic encapsulation layer from overflowing outside the display panel by setting a retaining wall. Furthermore, compared with the solution of forming a retaining wall by a substrate in the prior art, the present application sets the retaining wall on the side of the first inorganic encapsulation layer away from the substrate, which can avoid the influence of the overlapping metal wire on the substrate on the retaining wall, reduce the distance between the display area and the dam area, thereby reducing the frame of the display panel, and can also break through the height limit of the retaining wall, without the need to set a buffer area for the organic encapsulation layer, further reducing the frame of the display panel.

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] In addition, in order to better illustrate the present application, numerous specific details are given in the following specific embodiments. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods and means well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0036] Figure 2 is a top view of a display panel provided in an embodiment of the present application, Figure 3 is a schematic cross-sectional structure diagram of a display panel provided in the first embodiment of the present application, and Figure 3 yes Figure 2 The cross-sectional structure diagram of the display panel along the AA' direction is shown in FIG. Figure 2 and Figure 3 The display panel 100 includes a display area AA and a non-display area NA surrounding the display area AA. The non-display area NA includes a near display area 101 and a dam area 102. In a direction X from the display area AA to the non-display area NA, the near display area 101 and the dam area 102 are arranged in sequence.

[0037] The display panel 100 further includes a substrate 10, an encapsulation layer 20 and a retaining wall 30, wherein the encapsulation layer 20 is located on one side of the substrate 10, and the encapsulation layer 20 includes a first inorganic encapsulation layer 21 and an organic encapsulation layer 22, wherein the organic encapsulation layer 22 is located on the side of the first inorganic encapsulation layer 21 away from the substrate 10, and the organic encapsulation layer 22 is located in the display area AA and the near-display area 101, and the retaining wall 30 is located on the side of the first inorganic encapsulation layer 21 away from the substrate 10, and the retaining wall 30 is located in the dam area 102. The display panel 100 is provided with the retaining wall 30, so as to prevent the organic encapsulation layer 22 from overflowing to the outside of the display panel 100. Furthermore, compared with the prior art in which the retaining wall 30 is formed by the substrate 10, the solution in which the retaining wall 30 is arranged on the side of the first inorganic encapsulation layer 21 away from the substrate 10 can avoid the influence of the overlapping metal wire on the substrate 10 on the retaining wall 30, reduce the distance between the display area AA and the dam area 102, thereby reducing the frame of the display panel 100, and can also break through the height limit of the retaining wall 30. There is no need to set a buffer area of ​​the organic encapsulation layer 22, thereby further reducing the frame of the display panel 100.

[0038] Optionally, in one embodiment, the substrate 10 may be a flexible substrate. The flexible substrate may be formed of a polymer material such as polyimide (PI), polycarbonate (PC), polyethersulfone (PES), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyarylate (PAR), or fiberglass reinforced plastic (FRP). The flexible substrate may be transparent, translucent, or opaque.

[0039] Furthermore, in one embodiment, the substrate 10 may have a driving circuit, which is used to drive multiple light-emitting devices 30 to emit light of corresponding colors. For example, the substrate 10 may include a substrate layer, a barrier layer (Barrier), a buffer layer (Buffer), a gate insulating layer (Gate Insulator, GI), a capacitor insulating layer (Capacitance Insulator, CI), a gate, a source and drain, an interlayer dielectric layer (Interlayer Dielectric, ILD), a planarization layer (Planarization Layer, PLN), etc.

[0040] Optionally, in one embodiment, the substrate 10 includes a substrate 13 and an inorganic layer 11 , the inorganic layer 11 is located between the substrate 13 and the encapsulation layer 20 , and the first inorganic encapsulation layer 21 is in contact with the inorganic layer 11 to play an encapsulation role.

[0041] Optionally, in one embodiment, the encapsulation layer 20 is used to encapsulate the display panel 100 , which can isolate water and oxygen, reduce the probability of partial film structure failure due to impurities such as water and oxygen entering the display panel 100 , and ensure the life and reliability of the display panel 100 .

[0042] Optionally, in one embodiment, the encapsulation layer 20 may further include a second inorganic encapsulation layer 23 , and the second inorganic encapsulation layer 23 is located on a side of the organic encapsulation layer 22 and the barrier wall 30 away from the first inorganic encapsulation layer 21 .

[0043] Optionally, in one embodiment, the material of the first inorganic encapsulation layer 21 and the second inorganic encapsulation layer 23 is silicon oxide, silicon oxynitride or silicon nitride, etc. The first inorganic encapsulation layer 21 and the second inorganic encapsulation layer 23 can be a single layer, a multi-layer, a composite layer, etc.

[0044] Optionally, in one embodiment, the material of the organic encapsulation layer 22 is a fiber material, a resin material, or a material for a laminated multilayer board, etc. The organic encapsulation layer 22 can be a single layer, a multilayer, a composite layer, etc.

[0045] Optionally, in one embodiment, the material of the retaining wall 30 may be an organic material.

[0046] Optionally, in one embodiment, in a direction Y perpendicular to the substrate 10 , a size L1 of the retaining wall 30 is larger than a size L2 of the organic encapsulation layer 22 , thereby effectively preventing the organic encapsulation layer 22 from overflowing to the outside of the display panel 100 .

[0047] Optionally, in one embodiment, in the direction Y perpendicular to the substrate 10, the difference between the size L1 of the retaining wall 30 and the size L2 of the organic encapsulation layer 22 is greater than or equal to 1 micron. For example, the difference between the size L1 of the retaining wall 30 and the size L2 of the organic encapsulation layer 22 is 1 micron, 2 microns, 3 microns, etc.

[0048] Optionally, in one embodiment, since the retaining wall 30 is arranged on the side of the first inorganic encapsulation layer 21 away from the substrate 10, the height limit of the retaining wall 30 can be broken, and there is no need to set a buffer area for the organic encapsulation layer 22. Therefore, the side of the organic encapsulation layer 22 away from the substrate 10 is flush, thereby improving the edge flatness of the organic encapsulation layer 22 and reducing the edge color deviation effect of the display panel 100.

[0049] Optionally, in one embodiment, the non-display area NA also includes an encapsulation area 103, which is located on a side of the dam area 102 away from the near display area 101. In the encapsulation area 103, the first inorganic encapsulation layer 21 and the second inorganic encapsulation layer 23 are in contact to perform an encapsulation function to prevent water vapor outside the display panel 100 from entering the display area AA.

[0050] Optionally, in one embodiment, the non-display area NA further includes a cutting area 104 , and in a direction X pointing from the display area AA to the non-display area NA, the near display area 101 , the dam area 102 , the encapsulation area 103 and the cutting area 104 are arranged in sequence.

[0051] Optionally, in one embodiment, a partition structure 12 is provided on a side of the substrate 10 located in the cutting area 104 close to the encapsulation layer 20 , and the partition structure 12 can prevent cutting cracks generated when the display panel 100 is cut from being transferred to the display area AA.

[0052] Optionally, in one embodiment, the partition structure 12 may be a groove structure.

[0053] The present application provides a display panel, which can prevent the organic encapsulation layer from overflowing to the outside of the display panel by setting a retaining wall. Furthermore, compared with the solution of forming a retaining wall by a substrate in the prior art, the present application sets the retaining wall on the side of the first inorganic encapsulation layer away from the substrate, which can avoid the influence of the overlapping metal wire on the substrate on the retaining wall, reduce the distance between the display area and the dam area, thereby reducing the frame of the display panel, and can also break through the height limit of the retaining wall, without setting a buffer area of ​​the organic encapsulation layer, further reducing the frame of the display panel.

[0054] Figure 4 is a schematic cross-sectional structure diagram of a display panel located in a packaging area provided in a second embodiment of the present application, Figure 5 is a schematic cross-sectional structure diagram of a display panel located in a packaging area provided in a third embodiment of the present application, Figure 6 is a schematic cross-sectional structure diagram of a display panel located in a packaging area provided in a fourth embodiment of the present application, Figure 7 FIG. 5 is a schematic diagram of a cross-sectional structure of a display panel located in a packaging area provided in the fifth embodiment of the present application. Figures 4 to 7 As shown, Figures 4 to 7 The display panel and Figure 3 The difference of the display panel shown is that the side of the substrate located at the encapsulation layer close to the encapsulation layer is provided with an uneven structure, or the side of the inorganic layer close to the encapsulation layer is an uneven structure, which can improve the encapsulation reliability of the display panel.

[0055] Optional, such as Figure 4 As shown, the display panel 10 is provided with a plurality of protruding structures 13, the plurality of protruding structures 13 are located between the inorganic layer 11 and the encapsulation layer 20, the plurality of protruding structures 13 are located in the encapsulation layer 103, and the plurality of protruding structures 13 can increase the contact area between the first inorganic encapsulation layer 21 and the second inorganic encapsulation layer 23, thereby improving the encapsulation reliability of the display panel 100.

[0056] Optional, such as Figures 5 to 7 As shown, the inorganic layer 11 located in the encapsulation area 103 is provided with a groove and / or a protrusion on one side close to the encapsulation layer 20 to increase the contact area between the first inorganic encapsulation layer 21 and the inorganic layer 11 , thereby improving the encapsulation reliability of the display panel 100 .

[0057] Further optional, such as Figure 5 As shown, a plurality of grooves 111 are provided on one side of the inorganic layer 11 located in the encapsulation area 103 close to the encapsulation layer 20 , and the first inorganic encapsulation layer 21 is filled into the plurality of grooves 111 . The plurality of grooves 111 can increase the contact area between the first inorganic encapsulation layer 21 and the inorganic layer 11 , thereby improving the encapsulation reliability of the display panel 100 .

[0058] Further optional, such as Figure 6 As shown, a plurality of protrusions 112 are provided on one side of the inorganic layer 11 located in the encapsulation area 103 close to the encapsulation layer 20. The plurality of protrusions 112 can increase the contact area between the first inorganic encapsulation layer 21 and the second inorganic encapsulation layer 23, and can increase the contact area between the first inorganic encapsulation layer 21 and the inorganic layer 11, thereby improving the encapsulation reliability of the display panel 100.

[0059] Further optional, such as Figure 7 As shown, the inorganic layer 11 located in the encapsulation area 103 is provided with a plurality of grooves 111 and a plurality of protrusions 112 on one side close to the encapsulation layer 20. The plurality of grooves 111 and the plurality of protrusions 112 can increase the contact area between the first inorganic encapsulation layer 21 and the second inorganic encapsulation layer 23, and can increase the contact area between the first inorganic encapsulation layer 21 and the inorganic layer 11, thereby improving the encapsulation reliability of the display panel 100.

[0060] The present application provides a display panel, which can prevent the organic encapsulation layer from overflowing to the outside of the display panel by setting a retaining wall. Furthermore, compared with the solution of forming a retaining wall by a substrate in the prior art, the present application sets the retaining wall on the side of the first inorganic encapsulation layer away from the substrate, which can avoid the influence of the overlapping metal wires on the substrate on the retaining wall, reduce the distance between the display area and the dam area, thereby reducing the frame of the display panel, and can also break through the height limit of the retaining wall. There is no need to set a buffer area for the organic encapsulation layer, further reducing the frame of the display panel. Furthermore, the side of the substrate located at the encapsulation layer close to the encapsulation layer is provided with an uneven structure, or the side of the inorganic layer close to the encapsulation layer is an uneven structure, which can improve the packaging reliability of the display panel.

[0061] Figure 8 is a top view of a display panel provided in a sixth embodiment of the present application, Fig. 9 is a top view of a display panel provided in the seventh embodiment of the present application, Fig.10 yes Figure 8 The cross-sectional structure diagram of the display area of ​​the display panel shown in FIG. Figures 8 to 10 As shown, Figures 8 to 10 The display panel and Figure 3 The difference of the display panel shown is that the display area is also provided with auxiliary retaining walls.

[0062] Optionally, in one embodiment, the display panel 100 further includes a pixel definition layer 40 , the pixel definition layer 40 is located between the substrate 10 and the encapsulation layer 30 , and the pixel definition layer 40 is located in the display area AA.

[0063] Optionally, in one embodiment, the pixel definition layer 40 includes a pixel definition portion 41 and a pixel opening 42 formed by the pixel definition portion 41 .

[0064] Optionally, in one embodiment, the display panel 100 further includes a light emitting unit 50 , and the light emitting unit 50 is located in the pixel opening 42 .

[0065] Optionally, in one embodiment, the display panel 100 further includes an auxiliary retaining wall 60, which is disposed in the same layer as the retaining wall 30, and is prepared simultaneously with the retaining wall 30. The auxiliary retaining wall 60 is located in the display area AA, and the auxiliary retaining wall 60 can block the organic encapsulation layer 22 in the display area AA, thereby improving the blocking effect of the retaining wall 30 on the organic encapsulation layer. Furthermore, the auxiliary retaining wall 60 can also be used to prevent the retaining wall 30 from being damaged during the patterning process due to its relatively thinness, thereby ensuring the uniformity of the patterning process.

[0066] Optionally, in one embodiment, the orthographic projection of the auxiliary blocking wall 60 on the substrate 10 is located within the orthographic projection of the pixel defining portion 41 on the substrate 10 , so as to prevent the auxiliary blocking wall 60 from affecting the light generated by the light-emitting unit 50 .

[0067] Optionally, in the direction Y perpendicular to the substrate 10 , the size L3 of the auxiliary retaining wall 60 is smaller than the size L2 of the organic encapsulation layer 22 , so as to avoid the size of the auxiliary retaining wall 60 affecting the flatness of the film layer of the display panel 100 and improve the display effect of the display panel 100 .

[0068] Optionally, the present application does not limit the specific shape of the auxiliary retaining wall 60. For example, the auxiliary retaining wall 60 may be a straight structure (eg Figure 7 As shown), bending structure (as Figure 8 shown) etc.

[0069] The present application provides a display panel, which can prevent the organic encapsulation layer from overflowing to the outside of the display panel by setting a retaining wall. Furthermore, compared with the solution of forming a retaining wall by a substrate in the prior art, the present application sets the retaining wall on the side of the first inorganic encapsulation layer away from the substrate, which can avoid the influence of the overlapping metal wire on the substrate on the retaining wall, reduce the distance between the display area and the dam area, thereby reducing the frame of the display panel, and can also break through the height limit of the retaining wall. There is no need to set a buffer area for the organic encapsulation layer, further reducing the frame of the display panel. Furthermore, the display area is also provided with an auxiliary retaining wall, which can improve the blocking effect of the retaining wall on the organic encapsulation layer and ensure the uniformity of the graphical process of the retaining wall.

[0070] An embodiment of the present application further provides a display module, which includes the display panel 100 provided in the above embodiment. Its technical principles and effects are similar and will not be described in detail here.

[0071] An embodiment of the present application further provides a display device, which includes the display panel 100 or the display module provided in the above embodiment. The display device is a product with an image display function. For example, the display device can be used to display static images, such as pictures or photos. The display device can also be used to display dynamic images, such as videos.

[0072] The display device can be a laptop computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted intelligent central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0073] In addition, the display device may also have functions such as taking photos, recording videos, fingerprint recognition, and face recognition. Accordingly, the display device also includes at least one functional module for realizing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, and the like.

[0074] The display device provided according to any embodiment of the present application and the display panel 100 provided in the embodiment of the present application belong to the same inventive concept, and have corresponding film layer structures and beneficial effects. Details not fully described in the embodiment of the display device can be found in the embodiment of the display panel 100, and will not be repeated here.

[0075] The present application also provides a method for manufacturing a display panel, which is used to manufacture the above-mentioned display panel 100 . Fig.11 FIG. 1 is a schematic diagram of a method for preparing a display panel provided in an embodiment of the present application. Fig.11 As shown, the display panel 100 includes a display area AA and a non-display area NA surrounding the display area AA, the non-display area NA includes a near display area 101 and a dam area 102, and in a direction X from the display area AA to the non-display area NA, the near display area 101 and the dam area 102 are arranged in sequence. The manufacturing method of the display panel 100 includes:

[0076] S100: preparing a first inorganic encapsulation layer on a substrate.

[0077] Optionally, in one embodiment, the material of the first inorganic encapsulation layer 21 is silicon oxide, silicon oxynitride or silicon nitride, etc. The first inorganic encapsulation layer 21 can be a single layer, a multi-layer, a composite layer, etc.

[0078] S200: preparing an organic material layer on the first inorganic encapsulation layer, and patterning the organic material layer to form a retaining wall.

[0079] Optionally, in one embodiment, the retaining wall 30 is located in the dam area 102 .

[0080] Optionally, in one embodiment, step S200 may include: preparing an organic material layer on the first inorganic encapsulation layer, and patterning the organic material layer to form a retaining wall and an auxiliary retaining wall.

[0081] Optionally, in one embodiment, the auxiliary retaining wall 60 is located in the display area AA.

[0082] S300: preparing an organic encapsulation layer on the first inorganic encapsulation layer.

[0083] Optionally, in one embodiment, the material of the organic encapsulation layer 22 is a fiber material, a resin material, or a material for a laminated multilayer board, etc. The organic encapsulation layer 22 can be a single layer, a multilayer, a composite layer, etc.

[0084] Optionally, in one embodiment, in a direction Y perpendicular to the substrate 10 , the size of the retaining wall 30 is larger than the size of the organic encapsulation layer 22 , thereby effectively preventing the organic encapsulation layer 22 from overflowing to the outside of the display panel 100 .

[0085] Optionally, in one embodiment, in the direction Y perpendicular to the substrate 10, the difference between the size L1 of the retaining wall 30 and the size L2 of the organic encapsulation layer 22 is greater than or equal to 1 micron. For example, the difference between the size L1 of the retaining wall 30 and the size L2 of the organic encapsulation layer 22 is 1 micron, 2 microns, 3 microns, etc.

[0086] Optionally, in one embodiment, after step S300, the method may further include: preparing a second inorganic encapsulation layer on the organic encapsulation layer and the retaining wall.

[0087] Optionally, in one embodiment, the material of the second inorganic encapsulation layer 23 is silicon oxide, silicon oxynitride or silicon nitride, etc. The second inorganic encapsulation layer 23 can be a single layer, a multi-layer, a composite layer, etc.

[0088] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0089] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a non-display area surrounding the display area, the non-display area comprises a near-display area and a dam area, and in a direction from the display area to the non-display area, the near-display area and the dam area are arranged in sequence; The display panel further includes: substrate; an encapsulation layer, located on one side of the substrate, the encapsulation layer comprising a first inorganic encapsulation layer and an organic encapsulation layer, the organic encapsulation layer being located on a side of the first inorganic encapsulation layer away from the substrate, and the organic encapsulation layer being located in the display area and the near-display area; and The retaining wall is located on a side of the first inorganic encapsulation layer away from the substrate and is located in the dam area.

2. The display panel according to claim 1, characterized in that: In a direction perpendicular to the substrate, the size of the retaining wall is larger than the size of the organic encapsulation layer; Preferably, in a direction perpendicular to the substrate, the difference between the size of the retaining wall and the size of the organic encapsulation layer is greater than or equal to 1 micron; Preferably, a side of the organic encapsulation layer facing away from the substrate is flush.

3. The display panel according to claim 1, characterized in that: The substrate includes a substrate and an inorganic layer, the inorganic layer is located between the substrate and the encapsulation layer, and the first inorganic encapsulation layer is in contact with the inorganic layer.

4. The display panel according to claim 1, characterized in that: The encapsulation layer further comprises a second inorganic encapsulation layer, wherein the second inorganic encapsulation layer is located on a side of the organic encapsulation layer and the retaining wall away from the first inorganic encapsulation layer; Preferably, the non-display area further includes an encapsulation area, the encapsulation area is located on a side of the dam area away from the near-display area, and in the encapsulation area, the first inorganic encapsulation layer is in contact with the second inorganic encapsulation layer.

5. The display panel according to claim 3, characterized in that: The non-display area further includes a packaging area, the packaging area is located at a side of the dam area away from the near-display area, and a side of the substrate located in the packaging area close to the packaging layer is an uneven surface; Preferably, the display panel is further provided with a plurality of protrusion structures, the plurality of protrusion structures are located between the inorganic layer and the encapsulation layer, and the protrusion structures are located in the encapsulation area; Preferably, a plurality of grooves and / or protrusions are provided on a side of the inorganic layer located in the encapsulation area close to the encapsulation layer.

6. The display panel according to claim 5, characterized in that: The non-display area further includes a cutting area, and in a direction from the display area to the non-display area, the near-display area, the dam area, the encapsulation area and the cutting area are arranged in sequence; Preferably, a partition structure is provided on a side of the substrate located in the cutting area close to the packaging layer.

7. The display panel according to claim 1, characterized in that: The display panel further comprises a pixel definition layer, the pixel definition layer is located between the substrate and the encapsulation layer and is located in the display area, the pixel definition layer comprises a pixel definition portion and a pixel opening formed by the pixel definition portion; Preferably, the display panel further comprises a light emitting unit, and the light emitting unit is located in the pixel opening.

8. The display panel according to claim 7, characterized in that: The display panel further comprises an auxiliary retaining wall, the auxiliary retaining wall and the retaining wall are arranged at the same layer, and the auxiliary retaining wall is located in the display area; Preferably, the orthographic projection of the auxiliary retaining wall on the substrate is located within the orthographic projection of the pixel defining portion on the substrate; Preferably, the retaining wall is annular and surrounds the display area; Preferably, there are multiple auxiliary retaining walls, and the multiple auxiliary retaining walls are independently arranged.

9. A method for preparing a display panel, characterized in that: The display panel comprises a display area and a non-display area surrounding the display area, the non-display area comprises a near-display area and a dam area, and in a direction from the display area to the non-display area, the near-display area and the dam area are sequentially arranged; the method comprises: preparing a first inorganic encapsulation layer on a substrate; Preparing an organic material layer on the first inorganic encapsulation layer, and patterning the organic material layer to form a retaining wall, wherein the retaining wall is located in the dam area; An organic encapsulation layer is prepared on the first inorganic encapsulation layer, and the organic encapsulation layer is located in the display area and the near-display area.

10. A display device, characterized in that: A display panel comprising any one of claims 1-8.

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