Display panel, display device and preparation method of display panel

Abstract

The invention discloses a display panel, a display device and a preparation method of the display panel, the display panel comprises a screen body, a bonding device and an adhesive tape, one end of the bonding device is bonded with the screen body, and the adhesive tape is arranged at the bonding position of the screen body and the bonding device and is bonded with the screen body and the bonding device at the same time. The bonding device and the screen body are bonded together through the adhesive tape, the connection strength between the screen body and the bonding device is improved, and therefore the risk that under the condition that an adhesive layer in the display panel cracks due to external force, external water vapor enters a crack, and consequently the device in the display panel is short-circuited and fails is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of display equipment, and in particular to a display panel, a display device and a method for manufacturing the display panel. Background Art

[0002] With the development and popularization of display technology in recent years, display panels have been applied to various electronic devices, such as mobile phones, tablet computers or other portable electronic devices.

[0003] However, the inventors of the present application have discovered that the reliability of current display panels needs to be further improved. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a display panel, a display device and a method for manufacturing a display panel, which can improve product reliability.

[0005] In order to solve the above technical problems, the present application adopts a technical solution: providing a display panel, the display panel includes a screen body, a bonding device and a tape, one end of the bonding device is bonded to the screen body, the tape is arranged at the bonding position between the screen body and the bonding device, and is bonded to the screen body and the bonding device at the same time.

[0006] In order to solve the above technical problem, the present application also provides a technical solution: providing a display device, including the above-mentioned display panel.

[0007] To solve the above technical problems, the present application also provides a technical solution: a method for preparing a display panel is provided, the method comprising: bonding one end of a bonding device to a screen body; placing a tape at the bonding position between the screen body and the bonding device, and bonding the tape to the screen body and the bonding device at the same time.

[0008] Beneficial effect: The present application uses adhesive tape to bond the bonding device to the screen body, thereby increasing the connection strength between the screen body and the bonding device, thereby reducing the risk of external water vapor entering the cracks and causing short circuit failure of the device in the display panel when cracks appear in the adhesive layer inside the display panel due to external force. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. 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. Among them:

[0010] Figure 1 A schematic diagram of the structure of a display panel provided in one embodiment of the present application;

[0011] Figure 2 A schematic diagram of the structure of an adhesive tape provided in one embodiment of the present application;

[0012] Figure 3 for Figure 2 Schematic diagram of the exploded structure of the tape;

[0013] Figure 4 A schematic diagram of a tape structure provided in another embodiment of the present application;

[0014] Figure 5 A schematic diagram of a tape structure provided in another embodiment of the present application;

[0015] Figure 6 for Figure 1 Schematic diagram of the structure before the middle tape is bonded to the screen and the bonding device;

[0016] Figure 7 A schematic diagram of the structure of a display panel provided in another embodiment of the present application;

[0017] Figure 8 A schematic diagram of the structure of a display panel provided in another embodiment of the present application;

[0018] Fig. 9 A schematic diagram of the structure of a display panel provided in another embodiment of the present application;

[0019] Fig.10 A schematic diagram of the structure of a display panel provided in another embodiment of the present application;

[0020] Fig.11 for Figure 7 Schematic diagram of the structure before the middle tape is bonded to the screen and the bonding device;

[0021] Fig.12 A schematic diagram of the structure of a display device provided in one embodiment of the present application;

[0022] Fig.13 A flowchart of a method for preparing a display panel provided in one embodiment of the present application. DETAILED DESCRIPTION

[0023] 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.

[0024] The terms "first", "second", "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", "third" can expressly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. In the embodiments of this application, all directional indications (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the steps or units listed, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0025] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] See also Figure 1 In one embodiment of the present application, a display panel 100 is provided. The display panel 100 includes a screen body 10, a bonding device 20 and an adhesive tape 30. The screen body 10 has a display function and has a display surface 11 and a non-display surface 12 opposite to the display surface 11. The bonding device 20 is used for connecting and driving. The binding part is located on the non-display surface 12 of the screen body 10 and is bonded to the non-display surface 12 of the screen body 10 through the adhesive tape 30.

[0027] One end of the bonding device 20 is bonded to the screen body 10. Usually, the bonding device 20 is disposed on the non-display surface 12 of the screen body 10, one end of the bonding device 20 is bonded to the screen body 10, and the other end of the bonding device 20 protrudes from the screen body 10 and extends outward.

[0028] The adhesive tape 30 is disposed at the binding place between the screen body 10 and the bonding device 20, and is adhered to the screen body 10 and the bonding device 20 at the same time. Specifically, by adhering the bonding device 20 and the screen body 10 together with the adhesive tape 30, the connection between the screen body 10 and the bonding device 20 can be effectively protected, and the stability of the bonding device 20 when bonded to the screen body 10 can be enhanced, thereby reducing the risk of the bonding device 20 loosening or falling off due to external impact or vibration of the display panel 100. At the same time, the adhesive tape 30 can also provide additional protection for the screen body 10 and the bonding device 20, and prevent short circuits or other electrical faults caused by external contaminants entering the bonding area.

[0029] In the above-mentioned display panel 100, the bonding device 20 is bonded to the screen body 10 by using the tape 30 to increase the connection strength between the screen body 10 and the bonding device 20, thereby reducing the risk of external water vapor entering the cracks and causing short circuit failure of the devices in the display panel 100 when cracks appear in the adhesive layer of the display panel 100 due to external force.

[0030] Please continue reading Figure 1 In one embodiment, the bonding device 20 includes a chip on film (COF). In this embodiment, one end of the chip on film is bonded to the non-display surface 12 of the screen body 10, while the other end protrudes out of the screen body 10 and extends outward, so that the chip on film can be more conveniently connected to other components (such as a motherboard), providing flexibility for the subsequent assembly of the chip on film.

[0031] The adhesive tape 30 adheres the COF and the screen 10 . While fixing the position of the COF, the adhesive tape 30 can seal the gap between the screen 10 and the COF, preventing moisture from entering between the screen 10 and the COF, thereby protecting the electrical components on the COF.

[0032] In other embodiments, the bonding device 20 further includes a flexible circuit board, a driving circuit, or various sensors.

[0033] Please continue reading Figure 1 In one embodiment, the adhesive tape 30 includes an adhesive layer 31 and a protective layer 32 which are sequentially stacked in a direction away from the screen body 10 , and the adhesive layer 31 is bonded to the screen body 10 and the bonding device 20 at the same time.

[0034] Specifically, the adhesive layer 31 is used to bond the screen body 10 and the bonding device 20 of the display panel 100 to ensure a strong bond between the adhesive tape 30, the screen body 10, and the bonding device 20. The adhesive layer 31 can ensure a strong bonding force between the screen body 10 and the bonding device 20 to prevent the screen body 10 and the bonding device 20 from being separated, thereby ensuring the reliability of the display panel 100.

[0035] In one embodiment, the material of the adhesive layer 31 includes acrylic resin.

[0036] The protective layer 32 is disposed on the adhesive layer 31. After the adhesive tape 30 is adhered to the screen body 10 and the bonding device 20, the main function of the protective layer 32 is to provide additional protection for the display panel 100, such as preventing external pollutants such as moisture and dust from invading the bonding area, and preventing the bonding position of the screen body 10 and the bonding device 20 from being damaged by moisture corrosion, thereby reducing the risk of affecting the display effect of the display panel 100. In practical applications, the combined use of the adhesive layer 31 and the protective layer 32 not only improves the reliability of the bonding position, but also extends the service life of the display panel 100.

[0037] In one embodiment, the material of the protective layer 32 includes at least one of cycloolefin polymer and inorganic material, which is not limited here.

[0038] In one embodiment, the protection layer 32 also has a light shielding effect. The material of the protection layer 32 may be a light shielding material, such as graphite, so as to prevent light leakage from the edge of the display panel 100 .

[0039] Please continue reading Figure 1 In one embodiment, the adhesive tape 30 may include an adhesive layer 31 , thereby improving the convenience of the preparation process of the adhesive tape 30 .

[0040] In other embodiments, the adhesive tape 30 may include a plurality of adhesive layers 31, and the plurality of adhesive layers 31 are stacked in sequence, so that the adhesive layers 31 in the adhesive tape 30 have a high degree of stickiness. After long-term use or when used in a high temperature environment, the adhesive tape 30 will not break inside, thereby ensuring a high degree of bonding stability between the screen body 10 and the bonding device 20. The provision of a plurality of adhesive layers 31 can also reduce the deformation of the adhesive tape 30, ensure the distance between the screen body 10 and the bonding device 20, and thus reduce the degree of deformation of the display panel 100. The embodiment of the present application does not specifically limit the number of adhesive layers 31 in the adhesive tape 30. The following takes the adhesive tape 30 including one adhesive layer 31 as an example to illustrate the scheme of the embodiment of the present application. The scheme in which the adhesive tape 30 includes a plurality of adhesive layers 31 can be referred to the description below, and the embodiment of the present application will not be repeated.

[0041] Please continue reading Figure 1 In one embodiment, the thickness D1 of the adhesive layer 31 ranges from 0.5 μm to 2 μm to ensure that the adhesive layer 31 can effectively adhere the screen body 10 and the bonding device 20. For example, the thickness D1 of the adhesive layer 31 is 0.5 mm, 1.25 mm or 2 mm.

[0042] Please continue reading Figure 1In one embodiment, the thickness D2 of the protective layer 32 ranges from 0.5 μm to 1 μm to ensure that the protective layer 32 can effectively protect the screen body 10 and the bonding position of the bonding device 20. For example, the thickness D2 of the protective layer 32 is 0.5 mm, 0.75 mm or 1 mm.

[0043] Please also read Figure 1 and Figure 2 In one embodiment, at least a portion of the surface of the bonding layer 31 facing the protective layer 32 is formed with a first rough structure 311, and at least a portion of the surface of the protective layer 32 facing the bonding layer 31 is formed with a second rough structure 321 matching the first rough structure 311. By providing the matching first rough structure 311 and second rough structure 321, the contact area between the bonding layer 31 and the protective layer 32 can be increased, thereby further improving the structural strength between the bonding layer 31 and the protective layer 32.

[0044] It can be understood that in other embodiments, the contact surface between the adhesive layer 31 and the protective layer 32 can be a plane.

[0045] Please also read Figure 2 , Figure 3 and Figure 4 In one embodiment, one of the first rough structure 311 and the second rough structure 321 includes a protrusion 3111 , and the other includes a groove 3211 for receiving the protrusion 3111 .

[0046] Specifically, when the protrusions 3111 are disposed on the bonding layer 31 as the first roughness 311, the grooves 3211 are disposed on the protective layer 32 as the second roughness 321. Conversely, when the protrusions 3111 are disposed on the protective layer 32 as the second roughness 321, the grooves 3211 are disposed on the bonding layer 31 as the first roughness 311.

[0047] In one embodiment, the protrusion 3111 extends along the first direction Y, and there are a plurality of protrusions 3111, and the plurality of protrusions 3111 are arranged side by side in a second direction X intersecting the first direction Y. There are a plurality of grooves 3211, and the plurality of grooves 3211 are arranged in one-to-one correspondence with the plurality of protrusions 3111, and the protrusions 3111 are embedded in the corresponding grooves 3211. The above arrangement enables each protrusion 3111 to be accurately embedded in its corresponding groove 3211, which can not only improve the tightness of the connection, but also ensure that a consistent bonding force is formed on the contact surface between the adhesive layer 31 and the protective layer 32.

[0048] In one embodiment, the first direction Y is perpendicular to the second direction X. It is understood that the first direction Y may also be arranged to cross the second direction X in a state other than being perpendicular.

[0049] In one embodiment, the plurality of protrusions 3111 may be arranged at equal intervals, or may be arranged at preset intervals according to actual needs, which is not limited here.

[0050] In one embodiment, the cross sections of the plurality of protrusions 3111 are the same. The same cross-sectional structure can simplify the convenience of the manufacturing process of the protrusions 3111, and can also ensure that the connection between each protrusion 3111 and the groove 3211 has the same performance, which is conducive to maintaining the consistency and predictability of the overall structure of the tape 30.

[0051] Please also read Figure 4 and Figure 5 In one embodiment, the cross section of the protrusion 3111 is triangular. In other embodiments, the cross section of the protrusion 3111 also includes any one of a rectangular, semicircular or irregular polygonal shape, which is not limited here.

[0052] In one embodiment, the thickness of the adhesive layer 31 is uniform. Figure 6 The thickness of the adhesive layer 31 is uniform. When the adhesive tape 30 is pressed to the bonding position of the screen body 10 and the bonding device 20 by the pressure head, the adhesive layer 31 has fluidity before being cured, and can adapt to the thickness of the adhesive layer 31 required by the surface of the screen body 10, the surface of the bonding device 20, and the bonding position between the screen body 10 and the bonding device 20, thereby forming Figure 1 The adhesive layer 31 in the adhesive tape 30 is shown in a cured state. The uniform adhesive layer 31 can ensure uniform stress distribution at the bonding position of the bonding screen 10 and the bonding device 20, reduce the risk of stress concentration caused by the adhesive layer 31 being too thick or too thin locally, and thus improve the product reliability of the display panel 100.

[0053] In another embodiment, the thickness of the adhesive layer 31 may also be unevenly set according to the adhesion requirements of the bonding positions of the screen body 10 and the bonding device 20, which is not limited here.

[0054] Please continue reading Figure 1 In one embodiment, the thickness of the protective layer 32 is uniform. The uniform protective layer 32 can ensure that the bonding positions of the screen 10 and the bonding device 20 can be protected to the same extent after the adhesive tape 30 is attached to the bonding positions, thereby avoiding insufficient protection or waste of the protective force of the protective layer 32 due to local excessive thickness or thinness, thereby extending the service life of the product.

[0055] In another embodiment, the thickness of the protection layer 32 may also be unevenly set according to the protection requirements of the bonding positions of the screen body 10 and the bonding device 20, which is not limited here.

[0056] See also Figure 7In one embodiment, the adhesive tape 30 includes a first adhesive tape portion 33 and a second adhesive tape portion 34 connected to each other, the first adhesive tape portion 33 is located on the side of the screen body 10 away from the bonding device 20, and the second adhesive tape portion 34 is located on the side of the bonding device 20 facing the screen body 10. Alternatively, the first adhesive tape portion 33 is located on the side of the bonding device 20 away from the screen body 10, and the second adhesive tape portion 34 is located on the side of the screen body 10 facing the bonding device 20, wherein the thickness of the adhesive layer 31 in the second adhesive tape portion 34 is greater than the thickness of the adhesive layer 31 in the first adhesive tape portion 33. The above arrangement enables the adhesive tape 30 to adapt to the specific requirements of different parts of the bonding position of the screen body 10 and the bonding device 20, thereby optimizing the bonding performance of the entire adhesive tape 30.

[0057] Specifically, when the first tape portion 33 is located on the side of the screen body 10 away from the bonding device 20 and the second tape portion 34 is located on the side of the bonding device 20 facing the screen body 10, the bonding device 20 includes: Figure 7 and Figure 8 The two cases shown in Figure 2 are as follows. Figure 7 In the embodiment, the bonding device 20 is bonded to the non-display surface 12 side of the screen body 10. Figure 8 In the embodiment, the bonding device 20 is bonded to the display surface 11 side of the screen body 10. It can be seen that at this time Figure 7 and Figure 8 The thickness of the adhesive layer 31 in the second tape portion 34 is greater than the thickness of the adhesive layer 31 in the first tape portion 33 .

[0058] In the case where the first tape portion 33 is located on the side of the bonding device 20 away from the screen body 10 and the second tape portion 34 is located on the side of the screen body 10 facing the bonding device 20, the bonding device 20 includes: Fig. 9 and Fig.10 The two cases shown in Figure 2 are as follows. Fig. 9 In the embodiment, the bonding device 20 is bonded to the non-display surface 12 side of the screen body 10. Fig.10 In the embodiment, the bonding device 20 is bonded to the display surface 11 side of the screen body 10. It can be seen that at this time Fig. 9 and Fig.10 The thickness of the adhesive layer 31 in the second tape portion 34 is also greater than the thickness of the adhesive layer 31 in the first tape portion 33 .

[0059] Combination Figure 7 , Figure 8 , Fig. 9 and Fig.10It can be seen that by adjusting the thickness of the adhesive layer 31 in the first tape portion 33 and the second tape portion 34, different degrees of adhesion of the adhesive layer 31 can be achieved at different positions. For example, the second tape portion 34 may need to provide a stronger fixing effect, so its adhesive layer 31 is thicker, so that the thicker adhesive layer 31 can generally better absorb and disperse stress and reduce damage caused by temperature changes or mechanical impacts. The first tape portion 33 may focus more on removability or be set in a position that is not easily deformed. For another example, in practical applications, a thicker adhesive layer 31 (such as the second tape portion 34) helps to improve heat conduction and improve heat dissipation efficiency.

[0060] See also Fig.11 In one embodiment of the actual production of the adhesive tape 30, the adhesive tapes with adhesive layers 31 of different thicknesses can be pressed by a pressing head, that is, the adhesive tapes 30 with adhesive layers 31 of different thicknesses can be adhered to different areas in a continuous process.

[0061] In another embodiment of the actual production of the adhesive tape 30, the adhesive tape 30 having two adhesive layers 31 of different thicknesses may be first produced, and then they are combined together to form the final product.

[0062] Please continue reading Fig.11 In one embodiment, the protective layer 32 has a uniform thickness. In the case where the thickness of the adhesive layer 31 is inconsistent, the uniform protective layer 32 can ensure that the bonding positions of the screen 10 and the bonding device 20 can be protected to the same extent after the adhesive tape 30 is attached to the bonding positions, thereby avoiding insufficient protection or waste of the protective force of the protective layer 32 due to local excessive thickness or thinness, thereby extending the service life of the product.

[0063] In another embodiment, the thickness of the protection layer 32 may also be unevenly set according to the protection requirements of the bonding positions of the screen body 10 and the bonding device 20, which is not limited here.

[0064] Please continue reading Fig.11 In one embodiment, the surface of the tape 30 facing away from the screen body 10 is parallel to the screen body 10. By making the exposed surface of the tape 30 parallel to the screen body 10, it can be ensured that the entire display panel 100 remains smooth and has no protrusions after installation, thereby improving the aesthetics of the entire display panel 100.

[0065] Please refer again Figure 7 In one embodiment, the bonding device 20 is bonded to the non-display surface 12 side of the screen 10, and the adhesive tape 30 is located on the side of the bonding device 20 facing the screen 10. The adhesive tape 30 is located between the bonding device 20 and the screen 10, and is used to firmly fix the bonding device 20 on the screen 10, while providing buffering and protection for the bonding position of the screen 10 and the bonding device 20, to prevent the bonding device 20 from being damaged due to vibration or impact.

[0066] In one embodiment, the bonding device 20 includes a COF, one end of which is bonded to the non-display surface 12 of the display panel 100, and the other end of which protrudes out of the display panel 100 and extends outward, so that the COF can be more conveniently connected to other components (such as a motherboard), providing flexibility for subsequent assembly of the COF.

[0067] The adhesive tape 30 adheres the COF and the screen 10 . While fixing the position of the COF, the adhesive tape 30 can seal the gap between the screen 10 and the COF, preventing moisture from entering between the screen 10 and the COF, thereby protecting the electrical components on the COF.

[0068] In other embodiments, the bonding device 20 further includes a flexible circuit board, a driving circuit, or various sensors.

[0069] See also Fig.12 The present application also provides a display device 200 , comprising the above-mentioned display panel 100 .

[0070] The display device 200 may be embodied as any product or component having a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, or the like.

[0071] See also Fig.13 The present application also provides a method for preparing a display panel, the method comprising:

[0072] S1: Bond one end of the bonding device 20 to the screen body 10.

[0073] S2: placing an adhesive tape 30 at the bonding position between the screen body 10 and the bonding device 20, and bonding the adhesive tape 30 to the screen body 10 and the bonding device 20 at the same time.

[0074] The adhesive tape 30 in the method is the adhesive tape 30 in the above embodiment, which will not be described in detail here.

[0075] In the above method, the thickness of the adhesive layer 31 and the thickness of the protective layer 32 in the tape 30 can be prepared in advance according to the requirements, so that the thickness of the adhesive layer 31 and the thickness of the protective layer 32 can adapt to and match the bonding requirements at the bonding positions of the screen body 10 and the bonding device 20 to be bonded, thereby improving the subsequent bonding of the tape 30 to the screen body 10 and the bonding device 20, reducing the need to adjust the thickness of the colloid bonded to the screen body 10 and the bonding device 20 in the prior art, and further improving the preparation efficiency of the display panel 100.

[0076] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: Screen body; A bonding device, one end of which is bonded to the screen body; The adhesive tape is arranged at the bonding position between the screen body and the bonding device, and is bonded to the screen body and the bonding device at the same time.

2. The display panel according to claim 1, characterized in that: The adhesive tape includes an adhesive layer and a protective layer which are sequentially stacked in a direction away from the screen body, and the adhesive layer is bonded to the screen body and the bonding device at the same time; Preferably, the thickness of the bonding layer is in the range of 0.5 μm to 2 μm; Preferably, the thickness of the protective layer is in the range of 0.5 μm-1 μm.

3. The display panel according to claim 2, characterized in that: The material of the bonding layer includes acrylic resin; And / or, the material of the protective layer includes at least one of cycloolefin polymer and inorganic material.

4. The display panel according to claim 2, characterized in that: A first rough structure is formed on at least a portion of the surface of the bonding layer facing the protective layer, and a second rough structure matching the first rough structure is formed on at least a portion of the surface of the protective layer facing the bonding layer.

5. The display panel according to claim 4, characterized in that: One of the first rough structure and the second rough structure comprises a protrusion, and the other comprises a groove for receiving the protrusion; Preferably, the protrusion extends along the first direction, the number of the protrusion is multiple, the multiple protrusions are arranged side by side in a second direction intersecting the first direction, the number of the grooves is multiple, the multiple grooves are arranged in one-to-one correspondence with the multiple protrusions, and the protrusions are embedded in the corresponding grooves; Preferably, the first direction is perpendicular to the second direction; Preferably, the cross-sections of the plurality of protrusions are the same; Preferably, the cross section of the protrusion is triangular.

6. The display panel according to claim 2, characterized in that: The thickness of the bonding layer is uniform; Preferably, the protective layer has a uniform thickness.

7. The display panel according to claim 2, characterized in that: The adhesive tape comprises a first adhesive tape portion and a second adhesive tape portion connected to each other, the first adhesive tape portion is located on a side of the screen body away from the bonding device, and the second adhesive tape portion is located on a side of the bonding device facing the screen body, or the first adhesive tape portion is located on a side of the bonding device away from the screen body, and the second adhesive tape portion is located on a side of the screen body facing the bonding device, wherein the thickness of the adhesive layer in the second adhesive tape portion is greater than the thickness of the adhesive layer in the first adhesive tape portion; Preferably, the protective layer has a uniform thickness; Preferably, the surface of the adhesive tape facing away from the screen body is a surface parallel to the screen body.

8. The display panel according to claim 1, characterized in that: The bonding device is bonded to the non-display surface side of the screen body, and the adhesive tape is located on the side of the bonding device facing the screen body; Preferably, the bonding device comprises a chip on film.

9. A display device, characterized in that: The display panel comprises any one of claims 1 to 8.

10. A method for preparing a display panel, characterized in that: The method comprises: Bond one end of the bonding device to the screen; An adhesive tape is placed at the bonding position between the screen body and the bonding device, and the adhesive tape is bonded to the screen body and the bonding device at the same time.

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