A display panel and a display device

Abstract

The present application relates to the technical field of display panels, and particularly to a display panel and a display device. The display panel includes a bending area and a non-bending area, and the display panel includes a first cover plate and a barrier coating, and the barrier coating is disposed on at least one side of the first cover plate. In a direction perpendicular to the plane where the display panel is located, the thickness of the barrier coating in the bending area is A, and the thickness of the barrier coating in the non-bending area is B, where A>0, B≥0, and A≠B. In the present application, the barrier coating has the ability to block water and oxygen. Disposing the barrier coating on one side of the first cover plate can prevent the local micro-cracks of the UTG product from expanding in a high-temperature and high-humidity environment, thereby improving the durability of the foldable UTG cover plate in a high-temperature and high-humidity environment. Due to the influence of the bending force on the bending area, there will be a problem of further expansion of cracks. Therefore, in the present application, A>0, B≥0, and A≠B. In this way, at least it is ensured that the bending area can be protected by the barrier coating, thereby avoiding the further expansion of micro-cracks.

Description

Technical Field

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

[0002] At present, the processing technology of folding UTG (Ultra-Thin Glass) cover plates mainly uses the protruding diamond grains on the CNC grinding wheel to grind the large glass to achieve slicing, and then uses the edge etching process to chemically polish the edges of the sliced ​​glass. The CNC wheel cutting method will inevitably produce microcracks on the edge of the UTG. The size and number of microcracks are related to the quality of the diamond grains on the wheel, and the wheel itself is also a consumable; subsequent chemical polishing cannot completely eliminate microcracks because the etching rate at the cracks and flat areas is similar. In this way, the edges of the UTG products prepared by the above processing technology will have a certain degree of microcracks, which are more serious on the cut surface. Summary of the invention

[0003] The present application provides a display panel and a display device to solve the problem of low durability of the existing UTG cover in a high temperature and high humidity environment.

[0004] According to a first aspect of the present application, the present application provides a display panel, including a bending area and a non-bending area, wherein the display panel includes a first cover plate and a barrier coating. The barrier coating is disposed on at least one side of the first cover plate. In a direction perpendicular to the plane where the display panel is located, the thickness of the barrier coating in the bending area is A, and the thickness of the barrier coating in the non-bending area is B, wherein A>0, B≥0, and A≠B.

[0005] According to a second aspect of the present application, the present application also provides a display device, comprising any one of the above-mentioned display panels.

[0006] Beneficial effects of this application:

[0007] In the display panel and display device provided by the present application, the barrier coating has the ability to block water and oxygen. The barrier coating is arranged on one side of the first cover plate, which can prevent the high temperature and high humidity environment from causing the local microcracks of the UTG product to expand, thereby improving the durability of the foldable UTG cover plate in a high temperature and high humidity environment. Since the bending area is affected by the bending force, there will be a problem of further expansion of the cracks. Therefore, in the present application, the thickness of the barrier coating in the bending area is A, and the thickness of the barrier coating in the non-bending area is B, wherein A>0, B≥0, and A≠B. In this way, at least it is ensured that the bending area can be protected by the barrier coating, thereby preventing further expansion of microcracks.

[0008] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic diagram of a three-dimensional structure of a display panel provided in this application;

[0010] Figure 2 A partial cross-sectional view of a bending area of ​​a display panel of the present application in a first embodiment;

[0011] Figure 3 A cross-sectional view of a first cover plate of a display panel of the present application provided with a barrier coating in a second embodiment;

[0012] Figure 4 A cross-sectional view of a first cover plate of a display panel of the present application having a barrier coating disposed thereon in a third embodiment;

[0013] Figure 5 A cross-sectional view of a first cover plate of a display panel of the present application having a barrier coating disposed thereon in a fourth embodiment;

[0014] Figure 6 A partial cross-sectional view of the bending area of ​​the display panel of the present application in the fifth embodiment;

[0015] Figure 7 A cross-sectional view of a first cover plate provided with a barrier coating in a sixth embodiment of the display panel of the present application;

[0016] Figure 8 A cross-sectional view of a first cover plate provided with a barrier coating in a seventh embodiment of the display panel of the present application;

[0017] Fig. 9 A partial cross-sectional view of a non-bending area of ​​the display panel of the present application in the eighth embodiment;

[0018] Fig.10 A partial cross-sectional view of a non-bending area of ​​a display panel in a ninth embodiment of the present application;

[0019] Fig.11 A partial cross-sectional view of a non-bending area of ​​a display panel in a tenth embodiment of the present application;

[0020] Fig.12 A schematic diagram of the structure of a display device provided in this application.

[0021] Reference numerals:

[0022] 1000-display device;

[0023] 100-display panel;

[0024] 1- first cover plate;

[0025] 101-bending area;

[0026] 101a-bending zone edge;

[0027] 102- non-bending area;

[0028] 102a- edge of non-bending area;

[0029] 102b-body area;

[0030] 102c-first transition zone;

[0031] 11-middle part;

[0032] 110- Transitional section;

[0033] 12-end;

[0034] 2- Barrier coating;

[0035] 21- a first inorganic layer;

[0036] 22-first organic layer;

[0037] 23-Second inorganic layer.

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0039] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0040] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0041] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0042] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0044] The folding performance of UTG is directly related to the number, size, and shape of microcracks. The essential reason why UTG breaks when bent is that the microcracks extend to the product breaking. Under ideal conditions, there is a stress threshold for microcracks of a certain size, number, and shape. When this threshold is exceeded, the microcracks quickly extend to the product breaking, and when it is less than this threshold, the microcracks cannot extend, and the folding performance of UTG is guaranteed. However, in actual situations, the local state (size, shape) of microcracks is not constant. In the presence of high temperature and water vapor, the local glass at the microcracks will react with water first, destroying the original Si-O tetrahedral structure of the glass, reducing the mechanical properties of the glass at the microcracks, and making the durability of the UTG cover low in high temperature and high humidity environments.

[0045] In response to the problem of low durability of existing UTG covers in high temperature and high humidity environments, the applicant has discovered that a barrier coating can be added to the outer surface of the UTG. The barrier coating has the ability to block water and oxygen, which can minimize the impact of high temperature and high humidity environments on further expansion of local microcracks in UTG products, thereby improving the durability of the foldable UTG cover in high temperature and high humidity environments.

[0046] Based on the above considerations, the applicant has designed a display panel 100 after in-depth research. Figure 1 The display panel 100 includes a bending region 101 and a non-bending region 102 , and the bending region 101 at least includes a bending region edge 101 a , and the non-bending region 102 at least includes a non-bending region edge 102 a .

[0047] like Figure 1 and Figure 2 As shown, the display panel 100 includes a first cover plate 1 , and the display panel 100 also includes a barrier coating 2 , which is disposed on at least one side of the first cover plate 1 .

[0048] like Figure 2 and 3 As shown, along the direction perpendicular to the plane of the display panel 100 (X direction), the thickness of the barrier coating 2 in the bending area 101 is A, and the thickness of the barrier coating 2 in the non-bending area 102 is B, wherein A>0, B≥0, A≠B.

[0049] exist Figure 3In the figure, the thickness of the barrier coating 2 in the bending area 101 is A, A>0. The thickness of the barrier coating 2 in the non-bending area 102 is B, B=0.

[0050] exist Figure 4 In the embodiment, the thickness of the barrier coating 2 in the bending area 101 is A, A>0. The thickness of the barrier coating 2 in the non-bending area 102 is B, B>0, A>B. In other embodiments, A<B is also acceptable.

[0051] In the present application, the barrier coating 2 has the ability to block water and oxygen. The barrier coating 2 is arranged on one side of the first cover plate 1, which can prevent the high temperature and high humidity environment from causing the local microcracks of the UTG product to expand, thereby improving the durability of the foldable UTG cover plate in a high temperature and high humidity environment. Since the bending area 101 is affected by the bending force, there will be a problem of further expansion of the cracks. Therefore, in the present application, the thickness of the barrier coating 2 in the bending area 101 is A, and the thickness of the barrier coating 2 in the non-bending area 102 is B, wherein A>0, B≥0, and A≠B. In this way, at least the bending area 101 is guaranteed to be protected by the barrier coating 2, thereby preventing further expansion of microcracks.

[0052] in, Figure 2 It is taken as an example that the barrier coating 2 is arranged on both sides of the first cover plate 1 .

[0053] In a possible implementation, the barrier coating 2 at least covers the bending zone edge 101a. Since the risk of crack propagation at the bending zone edge 101a is relatively high, the barrier coating 2 is provided at the bending zone edge 101a to prevent crack propagation.

[0054] According to some specific embodiments of the present application, the first cover plate 1 can be ultra-thin glass, which mainly refers to a glass sheet with a thickness of less than 30 μm, which has excellent performance indicators in terms of surface flatness, scratch resistance, high temperature resistance, etc., and has good optical properties, strong environmental stability, high surface hardness and scratch resistance. It is applied to the folding display panel and can play a good protective role on the display panel. Ultra-thin glass is made of silicate non-metallic materials formed by melting silicon dioxide and other chemical substances such as aluminum oxide. In some specific embodiments, ultra-thin glass is made of lithium aluminum silicate.

[0055] The barrier coating 2 is a coating structure having the ability to block water and oxygen, which may include one layer, two layers, three layers or more layers.

[0056] In a specific embodiment, the barrier coating 2 may include a first inorganic layer 21, which is formed of an inorganic material, such as silicon oxide, aluminum oxide, silicon nitride, etc. The first inorganic layer formed of an inorganic material has good density and can usually maintain a water vapor transmission rate of 10 -3 g / m 2·d or less, with good water and oxygen barrier effect.

[0057] like Figure 5 As shown, in a specific embodiment, the thickness of the first inorganic layer 21 in the bending area 101 is C, and the thickness of the first inorganic layer 21 in the non-bending area 102 is D, where C>D≥0. The thickness of the first inorganic layer 21 in the bending area 101 is relatively thick, which can better protect the bending area 101 and prevent further spread of microcracks.

[0058] like Figure 6 As shown, in a specific embodiment, along the first direction (Y direction), the first cover plate 1 includes an end portion 12 and a middle portion 11 that are connected to each other, and the middle portion 11 is located on the side of the end portion 12 close to the center of the first cover plate 1, and the thickness of the middle portion 11 is greater than the thickness of the end portion 12. Wherein, the first direction (Y direction) is parallel to the plane where the display panel 100 is located. Wherein, the barrier coating 2 includes a first inorganic layer 21, and the thickness of the first inorganic layer 21 at the end portion 12 is greater than the thickness of the first inorganic layer 21 at the middle portion 11. In this embodiment, the barrier coating 2 may also include other inorganic layers or organic layers. Since the force at the end portion 12 is greater when the display panel 100 is bent, the thickness of the first inorganic layer 21 arranged at the end portion 12 is greater than the thickness of the first inorganic layer 21 at the middle portion 11, so as to form better protection for the end portion 12.

[0059] exist Figure 2 and Figure 3 In the specific embodiment shown, the barrier coating 2 is disposed on both sides of the first cover plate 1 to protect both sides of the first cover plate 1 .

[0060] like Figure 5 and Figure 6 As shown, in a specific embodiment, the barrier coating 2 further includes a first organic layer 22, which is disposed on at least one side of the first inorganic layer 21 away from the first cover plate 1. The first organic layer 22 can be formed of an organic material, such as an acrylic material, an epoxy resin material, a silicone material, etc. The barrier coating 2 formed of an organic material has good step coverage ability, can effectively cover the cavity area of ​​the microcracks on the first cover plate 1, and has good elasticity, which is conducive to the release of bending stress.

[0061] In some specific embodiments, the barrier coating 2 may be a multilayer coating design using organic materials and inorganic materials alternately arranged. The barrier coating 2 may be fully wrapped around the outer surface of the first cover plate 1 or partially wrapped around the surface of the first cover plate 1.

[0062] Please continue to refer to Figure 5In a specific embodiment, the thickness of the first organic layer 22 in the bending region 101 is E, and the thickness of the first organic layer 22 in the non-bending region 102 is F, where F>E>0. In this embodiment, the thickness of the first organic layer 22 in the non-bending region 102 is greater than the thickness of the first organic layer 22 in the bending region 101. The barrier coating 2 can be formed together with the corresponding first inorganic layer 21 to ensure that the thickness of the barrier coating 2 is uniform.

[0063] like Figure 6 As shown, in a specific embodiment, the thickness of the first inorganic layer 21 at the end portion 12 is greater than the thickness of the first inorganic layer 21 at the middle portion 11. The barrier coating 2 may further include a first organic layer 22 and a second inorganic layer 23.

[0064] like Figure 7 As shown, in a specific embodiment, the barrier coating 2 further includes a second inorganic layer 23, the thickness of the second inorganic layer 23 in the bending area 101 is G, and the thickness of the second inorganic layer 23 in the non-bending area 102 is H, wherein H>G>0. In this embodiment, the thickness of the second inorganic layer 23 in the non-bending area 102 is greater than the thickness of the second inorganic layer 23 in the bending area 101. The barrier coating 2 can be formed together with the corresponding first inorganic layer 21 and / or the first organic layer 22 to ensure that the thickness of the barrier coating 2 is uniform.

[0065] like Figure 8 As shown, based on the above embodiment, the non-bending zone 102 includes a first transition zone 102c and a body zone 102b, and the first transition zone 102c is arranged close to the bending zone 101. The thickness of the first inorganic layer 21 in the first transition zone 102c is D1, and the thickness of the first inorganic layer 21 in the body zone 102b is D2, wherein D1>D2≥0. Such a design can ensure that the first inorganic layer 21 can completely cover the bending zone 101, thereby more effectively avoiding the risk of microcracks spreading in the bending zone 101.

[0066] In other embodiments, Fig. 9 As shown, the middle portion 11 has a transition portion 110 near the end portion 12, and the first inorganic layer 21 extends to the transition portion 110. This design can ensure that the first inorganic layer 21 can completely cover the end portion 12 of the bending zone 101, thereby more effectively avoiding the risk of microcrack diffusion at the end portion 12 of the bending zone 101, improving the durability under high temperature and high humidity, and enhancing the folding performance of the display panel.

[0067] According to some specific embodiments of the present application, Figure 4 As shown, the length L of the transition portion 110 is greater than or equal to 50 μm and less than or equal to 200 μm.

[0068] Optionally, the length of the transition portion 110 may be 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 or 200 μm, etc.

[0069] It can be understood that by designing the length of the transition portion 110 within the above range, while ensuring that the barrier coating 2 can completely cover the end 12 of the bending zone 101, the purpose of saving processing costs and simplifying the process flow can be more effectively achieved.

[0070] According to some specific embodiments of the present application, the first inorganic layer 21 is formed by a CVD (Chemical Vapor Evaporation) or ALD (atomic layer deposition) process; the first inorganic material includes SiN x 、SiO x 、SiO x N y and Al 2 O 3 One or more of .

[0071] In this embodiment, the first inorganic layer 21 is formed by a first inorganic material through a CVD or ALD process, which enables the first inorganic material to be uniformly and firmly deposited on the surface of the first cover plate 1, thereby improving the stability of the coating. x 、SiO x 、SiO x N y and Al 2 O 3 One or more of the above inorganic materials, such inorganic materials have the characteristic of good compactness, and can maintain the water vapor transmission rate of the formed first inorganic layer 21 at 10 -3 g / m 2 d or less, the ability of the first inorganic layer 21 to block water and oxygen is enhanced.

[0072] According to some specific embodiments of the present application, the thickness of the first inorganic layer 21 is greater than 0 and less than 200 nm.

[0073] Optionally, the thickness of the first inorganic layer 21 can be 1nm, 10nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100nm, 110nm, 120nm, 130nm, 140nm, 150nm, 160nm, 170nm, 180nm, 190nm or 200nm, etc., and of course it can also be other values ​​within the above range, which is not limited here.

[0074] It can be understood that by designing the thickness of the first inorganic layer 21 within the above range, the water and oxygen barrier capability of the first inorganic layer 21 can be ensured while reducing the impact of excessive film thickness on the overall performance of the first cover plate 1. If the thickness of the first inorganic layer is greater than 200 nm, the overall performance of the first cover plate 1 may be affected.

[0075] According to some specific embodiments of the present application, the first organic layer 22 is formed of an organic material by inkjet printing or coating process. The organic material includes one or more of acrylic material, epoxy resin material, and silicone material.

[0076] In this embodiment, the first organic layer 22 is formed by an organic material through inkjet printing or coating process, so that the first organic layer 22 can be evenly and firmly deposited on the surface of the first inorganic layer, thereby improving the stability of the coating. The organic material includes one or more of acrylic material, epoxy resin material, and silicone material. These organic materials have excellent step coverage ability, can effectively cover the cavity area of ​​microcracks, and have excellent elasticity. Stacking with the inorganic film layer helps to release the stress and bending stress of the inorganic film layer.

[0077] According to some specific embodiments of the present application, the thickness of the first organic layer 22 is greater than or equal to 1 μm and less than or equal to 3 μm.

[0078] Optionally, the thickness of the first organic layer 22 may be 1 μm, 1.2 μm, 1.4 μm, 1.6 μm, 1.8 μm, 2.0 μm, 2.2 μm, 2.4 μm, 2.6 μm, 2.8 μm or 3 μm.

[0079] It can be understood that by designing the thickness of the first organic layer 22 within the above range, the step coverage ability of the film layer can be better improved, the cavity area of ​​the microcracks can be more effectively covered, and it is more helpful to release the stress and bending stress of the inorganic film layer without affecting the optical properties of the first cover plate 1.

[0080] According to some specific embodiments of the present application, the transmittance of the first organic layer 22 is greater than 95%. The elastic modulus of the first organic layer 22 is 100 MPa-1000 MPa.

[0081] Optionally, the transmittance of the first organic layer 22 can be 96%, 97%, 98%, 99%, 100%, etc., and the elastic modulus of the first organic layer can be 100MPa, 200MPa, 300MPa, 400MPa, 500MPa, 600MPa, 700MPa, 800MPa, 900MPa or 1000MPa, etc.

[0082] It can be understood that by setting the transmittance and elastic modulus of the first organic layer 22 within the above-mentioned range, it can be ensured that the first organic layer 22 has excellent light transmittance and elasticity, so that it does not affect the optical properties of the first cover plate 1, and at the same time can effectively release the stress of the inorganic film layer and the bending stress of the display panel.

[0083] According to some specific embodiments of the present application, the second inorganic layer 23 is formed by a second inorganic material through a CVD or ALD process. The second inorganic material includes SiO x 、SiO x N y and Al 2 O 3 One or more of .

[0084] In this embodiment, the second inorganic layer 23 is formed by a second inorganic material through a CVD or ALD process, which enables the second inorganic material to be uniformly and firmly deposited on the surface of the first organic layer 22, thereby improving the stability of the coating. x 、SiO x N y and Al 2 O 3 One or more of the above inorganic materials, such inorganic materials have the characteristic of good compactness, and can maintain the water vapor transmission rate of the formed second inorganic layer 23 at 10 -3 g / m 2 ·d or less, the ability of the second inorganic layer 23 to block water and oxygen is improved. At the same time, this type of inorganic material is easy to form hydrogen bonds with the components of the adhesive (such as OCA), which can improve the interfacial adhesion with the adhesive (the adhesion can be greater than 5N / inch), which is beneficial to the connection between the display panel and other components in the display device.

[0085] According to some specific embodiments of the present application, the thickness of the second inorganic layer 23 is greater than or equal to 0.2 μm and less than or equal to 2 μm.

[0086] Optionally, the thickness of the second inorganic layer 23 may be 0.2 μm, 0.4 μm, 0.6 μm, 0.8 μm, 1.0 μm, 1.2 μm, 1.4 μm, 1.6 μm, 1.8 μm or 2 μm.

[0087] By designing the thickness of the second inorganic layer 23 within the above range, the performance of the barrier coating 2 can be improved without affecting the optical performance and folding performance of the first cover plate 1. If the thickness of the second inorganic layer 23 is less than 0.2 μm, the barrier coating 2's ability to block water and oxygen will not be significantly improved due to the thickness being too thin. If the thickness of the second inorganic layer 23 is greater than 2 μm, the optical performance and folding performance of the first cover plate 1 may be affected due to the thickness being too thick.

[0088] According to some specific embodiments of the present application, the water vapor transmission rate of the barrier coating 2 is less than or equal to 10 -4 g / m 2 ·d.

[0089] In this embodiment, the water vapor transmission rate of the barrier coating 2 is set to be less than or equal to 10 -4 g / m 2 ·d, it can ensure that the barrier coating 2 has excellent ability to block water and oxygen, can effectively avoid the influence of high temperature and high humidity environment on further expansion of local micro cracks of UTG products, and improve the durability of the foldable UTG cover in high temperature and high humidity environment.

[0090] like Fig.10 As shown, in another specific embodiment, in the non-bending area 102 of the first cover plate 1 , corresponding to the middle portion 11 , the barrier coating 2 may only include the first organic layer 22 and the second inorganic layer 23 .

[0091] like Fig.11 As shown, in another specific embodiment, in the non-bending area 102 of the first cover plate 1 , corresponding to the middle portion 11 and the end portion 12 , the barrier coating 2 may only include the first organic layer 22 and the second inorganic layer 23 .

[0092] Based on the display panel provided in the above embodiment, the present application also provides a display device, including the display panel provided in the present application. Fig.12 , Fig.12 It is a structural schematic diagram of a display device provided in an embodiment of the present application. Fig.12 The provided folding display device 1000 includes the display panel 10 provided by any of the above embodiments of the present application. Fig.12 The embodiment in the present application takes a mobile phone as an example to illustrate the display device 1000. It can be understood that the display device provided in the embodiment of the present application can also be a wearable product, a computer, a television, a car display device or other display devices with display functions, and the present application does not make specific restrictions on this. The display device provided in the embodiment of the present application has the beneficial effects of the display panel provided in the embodiment of the present application. For details, please refer to the specific description of the display panel in the above embodiments, and this embodiment will not be repeated here.

[0093] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that, it includes a bending area and a non-bending area, and the display panel includes: a first cover plate; a barrier coating disposed on at least one side of the first cover plate; in a direction perpendicular to the plane where the display panel is located, the thickness of the barrier coating in the bending area is A, and the thickness of the barrier coating in the non-bending area is B, where A>0, B≥0, and A≠B; the barrier coating includes: a first inorganic layer, the thickness of the first inorganic layer in the bending area is C, and the thickness of the first inorganic layer in the non-bending area is D, where C>D≥0; the non-bending area includes a first transition area and a body area, the first transition area is disposed close to the bending area, the thickness of the first inorganic layer in the first transition area is D1, and the thickness of the first inorganic layer in the body area is D2, where D1>D2≥0.

2. The display panel according to claim 1, characterized in that, along a first direction, the first cover plate includes a connected end portion and a middle portion, the middle portion is located on a side of the end portion close to the center of the first cover plate, and the thickness of the middle portion is greater than the thickness of the end portion; the first direction is parallel to the plane where the display panel is located; the barrier coating includes a first inorganic layer, and the thickness of the first inorganic layer at the end portion is greater than the thickness of the first inorganic layer at the middle portion.

3. The display panel according to claim 2, characterized in that, the barrier coating is disposed on both sides of the first cover plate.

4. The display panel according to claim 2, characterized in that, the barrier coating further includes a first organic layer disposed on at least one side of the first inorganic layer away from the first cover plate.

5. The display panel according to claim 4, characterized in that, the thickness of the first organic layer in the bending area is E, and the thickness of the first organic layer in the non-bending area is F, where F>E>0.

6. The display panel according to claim 4 or 5, characterized in that, the barrier coating further includes: a second inorganic layer, the thickness of the second inorganic layer in the bending area is G, and the thickness of the second inorganic layer in the non-bending area is H, where H>G>0.

7. The display panel according to claim 6, characterized in that, the thickness of the second inorganic layer is 0.2~2um.

8. The display panel according to claim 4, characterized in that, the thickness of the first organic layer is 1~3um.

9. The display panel according to claim 2, characterized in that, the thickness of the first inorganic layer is less than 200nm.

10. The display panel according to claim 1, characterized in that, the barrier coating at least covers the edge of the bending area.

11. A display device, characterized in that, the display device includes the display panel according to any one of claims 1~10.

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