Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device, and the display panel comprises a substrate which comprises a plurality of substrates and a plurality of barrier layers; a plurality of light-emitting functional layers; and the packaging structure layer is positioned on one side, deviating from the substrate, of the light-emitting functional layer. Wherein the plurality of substrates comprise a first substrate, and the plurality of barrier layers comprise a first barrier layer; the substrate comprises a first groove located in the transition area. An opening of the first groove is formed in the side, facing the light-emitting functional layer, of the substrate, and the first groove at least penetrates through the first substrate and the first barrier layer; the packaging structure layer is continuous on the side wall and the bottom wall of the first groove. According to the technical scheme, the path of water and oxygen invading the display area can be blocked, the display device is prevented from being eroded, the packaging reliability of the display panel is improved, and the service life of the display panel can be prolonged.

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] Organic Light Emitting Diode (OLED) display devices are widely used due to their light weight, self-luminescence, wide viewing angle, low driving voltage, high luminous efficiency, low power consumption and fast response speed. At present, OLED display screens are constantly developing in the direction of full screen and narrow frame. In order to increase the screen-to-body ratio of OLED products, the technical solution of punching holes in the display area of ​​the display screen to embed the camera has become the mainstream solution. However, this solution reduces the packaging reliability of the display screen, and water vapor and oxygen in the air can easily enter the display area and diffuse, thus forming black spots. Summary of the invention

[0003] In view of this, the embodiments of the present application are directed to providing a display panel and a method for manufacturing the same, and a display device, so as to solve the problem of low reliability of display panel packaging.

[0004] In a first aspect, the present application provides a display panel, which includes a display area and a hole area, and a transition area between the display area and the hole area. The display panel includes: a substrate, including multiple substrates and multiple barrier layers; multiple light-emitting functional layers, sequentially stacked on one side of the substrate; and a packaging structure layer, located on the side of the light-emitting functional layer away from the substrate; wherein the multiple substrates include a first substrate, the multiple barrier layers include a first barrier layer, and the first barrier layer is located on the side of the first substrate away from the light-emitting functional layer; the substrate includes a first groove, located in the transition area; the opening of the first groove is set on the side of the substrate facing the light-emitting functional layer, and the first groove at least penetrates the first substrate; the packaging structure layer is continuous on the side wall and bottom wall of the first groove.

[0005] In one embodiment, the plurality of substrates further includes a second substrate located on a side of the first barrier layer away from the light-emitting functional layer, and the first groove partially penetrates the second substrate.

[0006] In one embodiment, the first groove includes a first hole area and a second hole area adjacent to each other along the thickness direction of the substrate, the first hole area is opened in the second substrate, the second hole area is opened in the first barrier layer, and the orthographic projection of the first hole area on the second substrate covers the second hole area.

[0007] In one embodiment, the multiple blocking layers also include a second blocking layer, which is located on the side of the first substrate close to the light-emitting functional layer, and the first groove penetrates the second blocking layer; preferably, the first groove includes a third hole area and a fourth hole area adjacent to each other along the thickness direction of the substrate, the third hole area is opened in the first substrate, and the fourth hole area is opened in the second blocking layer, and the orthographic projection of the third hole area on the second substrate covers the fourth hole area.

[0008] In one embodiment, the substrate further includes a second groove located in the transition area and on the side of the first groove close to the display area, and the depth of the second groove is less than the depth of the first groove; preferably, the first groove partially penetrates the first substrate.

[0009] In one embodiment, at least one light-emitting functional layer extends from the display area to the transition area, and the light-emitting functional layer in the transition area is disconnected at the opening of the first groove and the second groove; preferably, the display panel also includes a dam, which is located on the side of the second groove close to the display area and is located between the light-emitting functional layer and the substrate; preferably, the encapsulation structure layer includes an organic encapsulation layer, which is located in the display area and terminates at the side of the dam close to the display area.

[0010] In one embodiment, the substrate further includes a third groove located on a side of the dam close to the display area, and a depth of the third groove is less than or equal to a depth of the second groove.

[0011] In one embodiment, the encapsulation structure layer and the light-emitting functional layer in the transition region fill the third groove.

[0012] The second aspect of the present application provides a method for preparing a display panel, the display panel includes a display area and a hole area, and a transition area between the display area and the hole area. The preparation method includes: etching the substrate once to obtain a groove intermediate structure, the groove intermediate structure is located in the transition area; etching the substrate twice to obtain a second groove, and deepening the groove intermediate structure to obtain a first groove, the second groove is located in the transition area, and is located on the side of the first groove close to the display area; preparing multiple light-emitting functional layers on the substrate; preparing an encapsulation structure layer on the side of the light-emitting functional layer away from the substrate; wherein the substrate includes multiple substrates and multiple barrier layers; the multiple substrates include a first substrate, the multiple barrier layers include a first barrier layer, and the first barrier layer is located on the side of the first substrate away from the light-emitting functional layer; the first groove at least passes through the first substrate and the first barrier layer.

[0013] A third aspect of the present application provides a display device, comprising the display panel mentioned in any of the above embodiments.

[0014] The display panel provided by the present application has a first groove formed in the portion of the substrate located in the transition zone, so that the first groove at least penetrates the first substrate, thereby isolating the first substrate in the transition zone, and making the packaging structure layer continuous on the side wall and bottom wall of the first groove, thereby blocking the invasion path of water vapor from the edge of the hole area to the display area. In summary, the technical solution provided by the present application can block the invasion path of water and oxygen to the display area, avoid the corrosion of the display device, improve the reliability of the display panel packaging, and help to extend the service life of the display panel.

[0015] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 Shown is a schematic structural diagram of a display panel provided in one embodiment of the present application.

[0018] Figure 2 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided in an embodiment of the present application.

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

[0020] Figure 4 Shown is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0021] Figure 5 Shown is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0022] Figure 6 Shown is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0023] Figure 7 Shown is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0024] Figure 8 Shown is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0025] Fig. 9FIG. 1 is a schematic diagram of a process for preparing a display panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present application.

[0027] In the related art, in order to prevent water and oxygen from entering the OLED display panel, a groove is set on the substrate around the opening area of ​​the display panel and the inner wall of the groove is encapsulated to block water and oxygen. However, water vapor easily enters from the cutting edge of the substrate near the hole area, bypasses the groove and reaches the encapsulation layer near the display area, causing corrosion and peeling of the encapsulation layer, resulting in black spots in the hole area, affecting the display effect.

[0028] In view of this, the present application provides a display panel and a method for manufacturing the same, and a display device to solve the problem of low reliability of display panel packaging.

[0029] Figure 1 FIG. 1 is a schematic diagram of the structure of a display panel provided in an embodiment of the present application. Figure 2 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided by an embodiment of the present application. Figure 1 and Figure 2 The display panel 10 includes a display area 100 and a hole area 200, and a transition area 300 located between the display area 100 and the hole area 200. The display panel 10 includes: a substrate 101, including a plurality of substrates and a plurality of barrier layers; a plurality of light-emitting functional layers 102, which are sequentially stacked on one side of the substrate 101; and a packaging structure layer 103, which is located on the side of the light-emitting functional layer 102 away from the substrate 101; wherein the plurality of substrates include a first substrate 1011, the plurality of barrier layers include a first barrier layer 1012, and the first barrier layer 1012 is located on the side of the first substrate 1011 away from the light-emitting functional layer 102; the substrate 101 includes a first groove 104, which is located in the transition area 300; the opening of the first groove 104 is arranged on the side of the substrate 101 facing the light-emitting functional layer 102, and the first groove 104 at least penetrates the first substrate 1011; the packaging structure layer 103 is continuous on the side wall and the bottom wall of the first groove 104.

[0030] A schematic diagram of a cross-sectional structure of a display panel provided by an embodiment of the present application: The first groove 104 at least penetrates the first substrate 1011 and the first barrier layer 1012 ; the encapsulation structure layer 103 is continuous on the sidewall and bottom wall of the first groove 104 .

[0031] Specifically, the display area 100 is an area on the display panel 10 for displaying images, the hole area 200 is used to install components such as cameras, receivers or sensors, and the transition area 300 separates the boundary of the display area 100 from the boundary of the hole area 200, thereby preventing the display area 100 from being corroded by water and oxygen due to the hole area 200 being punched. In some embodiments, the display area 100 is arranged around the hole area 200. The position of the hole area 200 in the display panel 10 is not limited, and the shape is not limited, and can be other shapes such as round, oval or square.

[0032] The substrate 101 of the display panel 10 is formed by alternating a plurality of substrates and barrier layers to isolate water and oxygen. Exemplarily, the material of the first substrate 1011 may be polyimide (PI), which is an excellent flexible material that can achieve a certain degree of bending function. Exemplarily, the material of the first barrier layer 1012 includes inorganic materials such as silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SiON) or their stacks. The plurality of light-emitting functional layers 102 may include light-emitting layers of different light-emitting colors so that their combination can produce a full-color display screen. The encapsulation structure layer 103 is used to encapsulate the light-emitting functional layer 102 to prevent the organic light-emitting material therein from being destroyed. Exemplarily, the material of the encapsulation structure layer 103 includes inorganic materials such as silicon dioxide, silicon nitride, and silicon oxynitride. The method for forming the encapsulation structure layer 103 may be a chemical vapor deposition method.

[0033] Exemplarily, the cross section of the first groove 104 in a direction perpendicular to the substrate 101 is an inverted trapezoid, and the opening area of ​​the first groove 104 is larger than the bottom wall area. There is an angle between the side wall of the first groove 104 and its bottom wall, and the angle may be an obtuse angle. Exemplarily, the angle may be 120°, 130°, or 135°, etc. At the opening of the first groove 104, the encapsulation structure layer 103 covers the side wall and the bottom wall of the first groove 104. In the side wall region of the first groove 104, the encapsulation structure layer 103 contacts the first substrate 1011 and the first barrier layer 1012, isolating the portion of the first substrate 1011 and the first barrier layer 1012 near the hole area 200 from the portion of the first substrate 1011 and the first barrier layer 1012 near the display area 100.

[0034] The display panel 10 provided in this embodiment has a first groove 104 formed on the portion of the substrate 101 located in the transition area 300, so that the first groove 104 at least penetrates the first substrate 1011 and the first barrier layer 1012, thereby separating the first substrate 1011 and the first barrier layer 1012 in the transition area 300, and making the encapsulation structure layer 103 continuous on the side wall and the bottom wall of the first groove 104, thereby blocking the invasion path of water vapor at the edge of the hole area 200 through the first substrate 1011 toward the display area 100. In summary, the technical solution of this embodiment can block the invasion path of water and oxygen into the display area 100, prevent the display device from being corroded, improve the reliability of the encapsulation of the display panel 10, and help to extend the service life of the display panel 10.

[0035] Figure 3 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided by another embodiment of the present application, see Figure 3 The multiple substrates further include a second substrate 1013 located on a side of the first barrier layer 1012 away from the light-emitting functional layer 102 , and the first groove 104 partially penetrates the second substrate 1013 .

[0036] Specifically, the second substrate 1013 provides physical support for each structural layer stacked on one side thereof to ensure the structural stability of the display panel 10. The material of the second substrate 1013 may include a hard material or a flexible material, such as polyimide (PI). In some embodiments, the second substrate 1013 is made of a flexible material so that the display panel 10 can achieve a curved display or folding function. The first groove 104 partially penetrates the second substrate 1013, and the first groove 104 is encapsulated by the encapsulation structure layer 103, and further, a barrier is formed at the second substrate 1013 to isolate water and oxygen.

[0037] In this embodiment, a second substrate 1013 is provided, and the first groove 104 partially penetrates the second substrate 1013 to further isolate water and oxygen, thereby further improving the reliability of the display panel 10 packaging.

[0038] In one embodiment, see Figure 2 and Figure 3 The first groove 104 includes a first hole area and a second hole area adjacent to each other along the thickness direction of the substrate 101, the first hole area is opened in the second substrate 1013, the second hole area is opened in the first blocking layer 1012, and the orthographic projection of the first hole area on the first blocking layer 1012 covers the second hole area.

[0039] Specifically, the first hole area and the second hole area are arranged adjacent to each other, the size of the first hole area is larger than the size of the second hole area, and the orthographic projection of the first hole area on the first barrier layer 1012 covers the second hole area, so that the sidewall of the first groove 104 forms a first undercut structure. The first undercut structure in this embodiment is a convex isolation structure formed by the edge of the first barrier layer 1012 being recessed inwardly relative to the first substrate 1011 and the second substrate 1013.

[0040] In this embodiment, adjacent first hole areas and second hole areas are provided on the first groove 104, and a first undercut structure can be formed on the sidewall of the first groove 104, thereby isolating the light-emitting functional layer 102 of the transition area 300, ensuring the effect of blocking water and oxygen, and further improving the reliability of the display panel 10 packaging.

[0041] Figure 4 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided by another embodiment of the present application, see Figure 4 The multiple blocking layers also include a second blocking layer 1014, which is located on the side of the first substrate 1011 close to the light-emitting functional layer 102, and the first groove 104 runs through the second blocking layer 1014; preferably, the first groove 104 includes a third hole area and a fourth hole area adjacent to each other along the thickness direction of the substrate 101, the third hole area is opened in the first substrate 1011, and the fourth hole area is opened in the second blocking layer 1014, and the orthographic projection of the third hole area on the second blocking layer 1014 covers the fourth hole area.

[0042] Specifically, the second barrier layer 1014 isolates the first substrate 1011 from the light-emitting functional layer 102 to prevent water vapor from invading the light-emitting functional layer 102 through the first substrate 1011. Exemplarily, the material of the second barrier layer 1014 includes inorganic materials such as silicon oxide (SiOx), silicon nitride (SiNx), silicon oxynitride (SiON) or their stacks. The first groove 104 runs through the second barrier layer 1014, and the first groove 104 is encapsulated by the encapsulation structure layer 103. Further, a barrier is formed at the second barrier layer 1014 to isolate water and oxygen. The third hole area and the fourth hole area are arranged adjacent to each other, the size of the third hole area is larger than the size of the fourth hole area, and the orthographic projection of the third hole area on the second barrier layer 1014 covers the fourth hole area, so that the sidewall of the first groove 104 forms a second undercut structure. The second undercut structure in this embodiment is a convex isolation structure formed by the edge of the second barrier layer 1014 being recessed inward relative to the first substrate 1011 and the encapsulation structure layer 103.

[0043] In this embodiment, a second barrier layer 1014 is provided, and the first groove 104 penetrates the second barrier layer 1014 to further isolate water and oxygen. Adjacent third hole areas and fourth hole areas are provided on the first groove 104 to form a second bottom cut structure on the side wall of the first groove 104. The subsequent packaging structure further ensures the effect of blocking water and oxygen, thereby further improving the reliability of the display panel 10 packaging.

[0044] Figure 5 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided by another embodiment of the present application, see Figure 5 The substrate 101 also includes a second groove 105, which is located in the transition area 300 and on the side of the first groove 104 close to the display area 100. The depth of the second groove 105 is less than or equal to the depth of the first groove 104. Preferably, the first groove 104 partially penetrates the first substrate 1011.

[0045] Exemplarily, the cross section of the second groove 105 in the direction perpendicular to the substrate 101 is an inverted trapezoid, and the opening area of ​​the second groove 105 is larger than the bottom wall area. Similar to the first groove 104, there is also an angle between the side wall of the second groove 105 and its bottom wall, and the angle can be an obtuse angle. Exemplarily, the angle can be 120°, 130° or 135°, etc. Similarly, at the opening of the second groove 105, the encapsulation structure layer 103 is covered on the side wall and bottom wall of the second groove 105 to improve the reliability of the encapsulation. The second groove 105 partially penetrates the first substrate 1011, and the second groove 105 is encapsulated by the encapsulation structure layer 103, and further, a barrier is formed at the first substrate 1011 to isolate water and oxygen. In addition, on the side of the first groove 104 close to the display area 100, the number of grooves can be multiple (including the second groove 105), the depth of each groove can be the same or different, and multiple grooves are concentrically arranged around the hole area 200, thereby forming multiple barriers to block water and oxygen.

[0046] In this embodiment, a second groove 105 is disposed on a side of the first groove 104 close to the display area 100 to further block the path for water and oxygen to invade the display area 100 , thereby further improving the reliability of the display panel 10 packaging.

[0047] Figure 6 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided by another embodiment of the present application, see Figure 6At least one light-emitting functional layer 102 extends from the display area 100 to the transition area 300, and the light-emitting functional layer 102 in the transition area 300 is disconnected at the opening of the first groove 104 and the second groove 105. Preferably, the display panel 10 also includes a dam 106, which is located on the side of the second groove 105 close to the display area 100 and is located between the light-emitting functional layer 102 and the substrate 101; preferably, the encapsulation structure layer 103 includes an organic encapsulation layer 1031, which is located in the display area 100 and ends at the side of the dam 106 close to the display area 100.

[0048] Specifically, extending at least one layer of the light-emitting functional layer 102 from the display area 100 to the transition area 300 can ensure the continuity of the display and avoid uneven brightness, color distortion or local failure. The light-emitting functional layer 102 of the transition area 300 is disconnected at the opening of the first groove 104 and the second groove 105 to ensure the effect of blocking water and oxygen. The dam 106 is located between the light-emitting functional layer 102 and the substrate 101, and the light-emitting functional layer 102 can extend to the transition area 300 across the dam 106. The organic encapsulation layer 1031 contacts the side wall of the dam 106 close to the display area 100, and does not cover the top surface of the dam 106. The organic material used in the organic encapsulation layer 1031 is generally liquid and has fluidity. Therefore, the dam 106 is set in the display panel 10, so that the boundary of the organic encapsulation layer 1031 is easier to control and prevent the organic encapsulation layer 1031 from overflowing.

[0049] In this embodiment, the light-emitting functional layer 102 in the transition region 300 is completely disconnected at the openings of the first groove 104 and the second groove 105 to further ensure the effect of blocking water and oxygen. The dam 106 is provided to prevent the organic encapsulation layer 1031 from overflowing, further improving the reliability of the display panel 10 encapsulation.

[0050] Figure 7 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided by another embodiment of the present application, see Figure 7 The substrate 101 further includes a third groove 107 located on a side of the dam 106 close to the display area 100 , and a depth of the third groove 107 is less than or equal to a depth of the second groove 105 .

[0051] Specifically, a third groove 107 is provided on the side of the dam 106 close to the display area 100, for storing a certain amount of the organic encapsulation layer 1031 from the display area 100, so that the display area 100 can have a sufficient thickness of the organic encapsulation layer 1031 and make the thickness more uniform. Exemplarily, the cross-sectional shape of the third groove 107 in the direction perpendicular to the substrate 101 can be an inverted trapezoid. The embodiment of the present application does not limit the depth and width of the third groove 107.

[0052] In this embodiment, a third groove 107 is provided on the side of the dam 106 close to the display area 100 to accommodate the overflowed portion of the organic encapsulation layer 1031 of the display area 100 so that it will not overflow into the transition area 300 or even the hole area 200, thereby further improving the reliability of the display panel 10 encapsulation.

[0053] Figure 8 FIG. 1 is a schematic diagram of a cross-sectional structure of a display panel provided by another embodiment of the present application, see Figure 8 , the encapsulation structure layer 103 and the light-emitting functional layer 102 in the transition region 300 fill the third groove 107 .

[0054] Specifically, the encapsulation structure layer 103 further includes a first inorganic encapsulation layer 1032 and a second inorganic encapsulation layer 1033, wherein the first inorganic encapsulation layer 1032 is located between the organic encapsulation layer 1031 and the light-emitting functional layer 102, and the second inorganic encapsulation layer 1033 is located on the side of the organic encapsulation layer 1031 away from the first inorganic encapsulation layer 1032. The light-emitting functional layer 102 covers the bottom wall of the third groove 107, and the encapsulation structure layer 103 covers the side wall of the third groove 107 and the side surface of the light-emitting functional layer 102 away from the bottom wall of the third groove 107. By forming a height difference between the top and the bottom of the third groove 107, the light-emitting functional layer 102 is isolated, and the light-emitting functional layer 102 is effectively encapsulated by the encapsulation structure layer 103, which can further improve the reliability of the encapsulation of the display panel 10.

[0055] Fig. 9 The figure shows a flow chart of a method for preparing a display panel provided in an embodiment of the present application. The method is applicable to the case of preparing a display panel, wherein the display panel includes a display area and a hole area, and a transition area between the display area and the hole area. Fig. 9 As shown, the preparation method comprises:

[0056] S110, etching the substrate once to obtain a groove middle structure, where the groove middle structure is located in the transition zone.

[0057] Specifically, before etching the substrate, a protective film layer needs to be prepared on the substrate to protect the portion of the substrate other than the groove. A photoresist is coated on the protective film layer in the area corresponding to the groove, and the protective film layer is exposed to pattern the protective film layer. Exemplarily, the substrate is etched once by an inorganic dry etching method to obtain the groove intermediate structure.

[0058] S120, performing secondary etching on the substrate to obtain a second groove, and deepening the middle structure of the groove to obtain the first groove, wherein the second groove is located in the transition area and on a side of the first groove close to the display area.

[0059] Specifically, before the substrate is subjected to secondary etching, the photoresist needs to be removed. Exemplarily, the substrate is subjected to secondary etching by inorganic dry etching to obtain the second groove, and the intermediate structure of the groove is further deepened to obtain the first groove.

[0060] S130, preparing a plurality of light-emitting functional layers on the substrate.

[0061] Specifically, before preparing multiple light-emitting functional layers, it is necessary to remove the protective film layer on the substrate. Exemplarily, multiple light-emitting functional layers can be prepared by atomic layer deposition technology. At least one light-emitting functional layer can be extended from the display area to the transition area, and disconnected at the openings of the first groove and the second groove, respectively, to further ensure the effect of isolating water and oxygen. Atomic layer deposition technology is a precise thin film deposition technology that can control the growth of thin films at the atomic layer level. Of course, the embodiments of the present application do not limit the preparation method.

[0062] S140, preparing a packaging structure layer on the side of the light-emitting functional layer away from the substrate. The substrate includes a plurality of substrates and a plurality of barrier layers; the plurality of substrates includes a first substrate, the plurality of barrier layers includes a first barrier layer, and the first barrier layer is located on the side of the first substrate away from the light-emitting functional layer; and the first groove at least penetrates the first substrate and the first barrier layer.

[0063] Specifically, an encapsulation structure layer is prepared on the side of the light-emitting functional layer away from the substrate, and the encapsulation structure layer may include multiple layers to form an effective encapsulation for the light-emitting functional layer. Exemplarily, the encapsulation structure layer may include an organic encapsulation layer and an inorganic encapsulation layer. The organic encapsulation layer may be prepared by inkjet printing technology, and the inorganic encapsulation layer may be prepared by chemical vapor deposition technology.

[0064] The technical solution of this embodiment etches the substrate once to obtain a groove middle structure; etches the substrate a second time to obtain a second groove, and deepens the groove middle structure to obtain a first groove; prepares multiple light-emitting functional layers on the substrate; and prepares a packaging structure layer on the side of the light-emitting functional layer away from the substrate, which can block the path of water and oxygen invading the display area, avoid corrosion of the display device, improve the reliability of the display panel packaging, and help extend the service life of the display panel.

[0065] The embodiment of the present application also provides a display device, including the display panel mentioned in any of the above embodiments. The display device provided in the embodiment of the present application has the beneficial effects of the display panel mentioned in the above embodiments, and its technical principles and effects are similar, which will not be repeated here.

[0066] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution of this application can be achieved, and this document is not limited here.

[0067] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A display panel, characterized in that: The display panel comprises a display area and a hole area, and a transition area between the display area and the hole area; the display panel comprises: a substrate, comprising a plurality of substrates and a plurality of barrier layers; A plurality of light-emitting functional layers are sequentially stacked on one side of the substrate; and The packaging structure layer is located on the side of the light-emitting functional layer away from the substrate; Among them, the multiple substrates include a first substrate, the multiple barrier layers include a first barrier layer, and the first barrier layer is located on the side of the first substrate away from the light-emitting functional layer; the substrate includes a first groove, which is located in the transition zone; the opening of the first groove is arranged on the side of the substrate facing the light-emitting functional layer, and the first groove at least penetrates the first substrate; the packaging structure layer is continuous on the side wall and the bottom wall of the first groove.

2. The display panel according to claim 1, characterized in that: The first groove at least penetrates the first barrier layer, Preferably, the plurality of substrates further include a second substrate located on a side of the first barrier layer away from the light-emitting functional layer, and the first groove partially penetrates the second substrate.

3. The display panel according to claim 2, characterized in that: The first groove includes a first hole area and a second hole area adjacent to each other along the thickness direction of the substrate, the first hole area is opened in the second substrate, the second hole area is opened in the first barrier layer, and the orthographic projection of the first hole area on the second substrate covers the second hole area.

4. The display panel according to claim 1, characterized in that: The plurality of barrier layers further include a second barrier layer located on a side of the first substrate close to the light-emitting functional layer, and the first groove penetrates the second barrier layer; Preferably, the first groove includes a third hole area and a fourth hole area which are adjacently arranged along the thickness direction of the substrate, the third hole area is opened in the first substrate, the fourth hole area is opened in the second barrier layer, and the orthographic projection of the third hole area on the second substrate covers the fourth hole area.

5. The display panel according to claim 1, characterized in that: The substrate further includes a second groove located in the transition area and located on a side of the first groove close to the display area, and a depth of the second groove is less than or equal to a depth of the first groove; Preferably, the first groove partially penetrates the first substrate.

6. The display panel according to claim 5, characterized in that: At least one layer of the light-emitting functional layer extends from the display area to the transition area, and the light-emitting functional layer in the transition area is disconnected at the openings of the first groove and the second groove; Preferably, the display panel further comprises a dam, which is located on a side of the second groove close to the display area and between the light-emitting functional layer and the substrate; Preferably, the encapsulation structure layer comprises an organic encapsulation layer, and the organic encapsulation layer is located in the display area and terminates at a side of the dam close to the display area.

7. The display panel according to claim 6, characterized in that: The substrate further includes a third groove located on a side of the dam close to the display area, and a depth of the third groove is less than or equal to a depth of the second groove.

8. The display panel according to claim 7, characterized in that: The encapsulation structure layer and the light-emitting functional layer in the transition region fill the third groove.

9. A method for preparing a display panel, characterized in that: The display panel includes a display area and a hole area, and a transition area between the display area and the hole area; the preparation method includes: Etching the substrate once to obtain a groove intermediate structure, wherein the groove intermediate structure is located in the transition zone; Performing secondary etching on the substrate to obtain a second groove, and deepening the middle structure of the groove to obtain a first groove, wherein the second groove is located in the transition area and on a side of the first groove close to the display area; Preparing a plurality of light-emitting functional layers on the substrate; Preparing a packaging structure layer on the side of the light-emitting functional layer away from the substrate; The substrate includes multiple substrates and multiple barrier layers; the multiple substrates include a first substrate, the multiple barrier layers include a first barrier layer, and the first barrier layer is located on a side of the first substrate away from the light-emitting functional layer; the first groove at least penetrates the first substrate.

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

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