Bending structure of display panel and manufacturing method thereof, and display panel

Abstract

This application relates to a bending structure for a display panel, a method for manufacturing the same, and the display panel itself. The bending structure of the display panel includes: a substrate; a wiring layer comprising multiple wirings located on one side of the substrate; and a protective layer located on the side of the wiring layer away from the substrate. The protective layer includes multiple spaced-apart protective structures, each corresponding to a wiring, with the projection of the protective structure toward the substrate at least partially overlapping the projection of the wiring toward the substrate. On one hand, each protective structure can protect one wiring, achieving good protection. On the other hand, no protective structure is needed where there are no wirings, making it easier for the bending structure of this display panel to bend, and reducing the stress experienced by the bending structure during bending. When this bending structure is used as the lower bezel of the display panel, the lower bezel area of ​​the display panel can be shortened.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a bending structure of a display panel and its manufacturing method, as well as the display panel itself. Background Technology

[0002] With the rapid development of mobile phone products and the increasing demands of users for visual experience, high screen-to-body ratio and narrow bezel displays are gradually becoming mainstream. Reducing the bezel width of the display panel is an important means to achieve a high screen-to-body ratio.

[0003] In traditional technology, the top, left, and right bezels of the display panel can be made very narrow, while the bottom bezel uses a bent wiring method.

[0004] However, with traditional techniques, the bottom border is routed in a bent manner, and due to the bending radius, it is difficult to narrow the width of the bottom border. Summary of the Invention

[0005] Therefore, it is necessary to address the aforementioned technical problems by providing a bending structure and manufacturing method for a display panel that can reduce the bending radius of the bezel area, as well as the display panel itself.

[0006] In a first aspect, this application provides a bending structure for a display panel, the bending structure of which includes:

[0007] Base;

[0008] A routing layer, comprising multiple traces located on one side of the substrate;

[0009] A protective layer is located on the side of the trace layer away from the substrate. The protective layer includes a plurality of spaced-apart protective structures, each of which is corresponding to the trace. The projection of the protective structure toward the substrate at least partially overlaps the projection of the trace toward the substrate.

[0010] In some embodiments, the cross-sectional area of ​​the protective structure decreases in a first direction from the substrate to the protective layer, and the cross-sectional plane is perpendicular to the first direction.

[0011] In some embodiments, the surface of the protective structure on the side away from the wiring layer is a cylindrical curved surface.

[0012] In some embodiments, the projection of the protective structure toward the substrate overlaps the projection of the trace toward the substrate.

[0013] In some embodiments, the bending structure of the display panel further includes a shrink adhesive layer located on the side of the substrate away from the wiring layer.

[0014] In some embodiments, the shrink adhesive layer includes a plurality of spaced-apart shrink adhesive structures, each shrink adhesive structure corresponding to the trace, and the projection of the shrink adhesive structure toward the substrate at least partially overlaps with the projection of the trace toward the substrate.

[0015] In some embodiments, the projection of the shrink adhesive structure toward the substrate overlaps the projection of the trace toward the substrate.

[0016] In some embodiments, the bending structure of the display panel further includes a first organic layer disposed between the protective layer and the wiring layer.

[0017] In some embodiments, the substrate includes: a polyimide layer; and a second organic layer disposed between the polyimide layer and the wiring layer.

[0018] In some embodiments, one end of the trace is located in the display area of ​​the display panel, and the other end of the trace is located in the bonding area of ​​the display panel; the thickness of the protective structure gradually decreases along the direction from close to the display area and the bonding area to far away from the display area and the bonding area.

[0019] Secondly, this application also provides a display panel, the display panel including a display area, a bending area and a binding area, the bending area being located between the display area and the binding area, the bending area including the aforementioned bending structure of the display panel.

[0020] Thirdly, this application also provides a method for manufacturing a bent structure of a display panel, the method comprising: providing a substrate; forming a wiring layer on one side of the substrate, the wiring layer comprising a plurality of wirings; forming a protective layer on the side of the wiring layer away from the substrate using an inkjet printing process, wherein the protective layer comprises a plurality of spaced-apart protective structures, each of the protective structures being disposed corresponding to the wirings, and the projection of the protective structure toward the substrate at least partially overlapping the projection of the wiring toward the substrate.

[0021] The aforementioned bending structure of the display panel includes a substrate, a wiring layer, and a protective layer. The wiring layer includes multiple traces capable of transmitting signals, located on one side of the substrate. The protective layer is located on the side of the wiring layer away from the substrate to protect the traces. The protective layer includes multiple spaced-apart protective structures, each corresponding to a trace. The projection of the protective structure toward the substrate at least partially overlaps with the projection of the trace toward the substrate. Furthermore, the protective structures are spaced apart and only positioned corresponding to the traces. This ensures that each protective structure protects one trace, achieving good protection. Additionally, protective structures are unnecessary where no traces are present, facilitating bending of the display panel and reducing stress during bending. This allows for smaller bending radii, enabling a shorter bottom bezel area when using this bending structure as the bottom bezel of the display panel. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a bent display panel in one embodiment;

[0024] Figure 2 This is a schematic diagram of the bending structure of the display panel in one embodiment;

[0025] Figure 3 This is a second schematic diagram of the bending structure of the display panel in one embodiment;

[0026] Figure 4 This is a third schematic diagram of the bending structure of the display panel in one embodiment;

[0027] Figure 5 This is a fourth schematic diagram of the bending structure of the display panel in one embodiment;

[0028] Figure 6 This is the fifth structural schematic diagram of the bending structure of the display panel in one embodiment;

[0029] Figure 7 This is a sixth schematic diagram of the bending structure of the display panel in one embodiment;

[0030] Figure 8This is the seventh structural schematic diagram of the bending structure of the display panel in one embodiment;

[0031] Figure 9 This is the eighth structural schematic diagram of the bending structure of the display panel in one embodiment;

[0032] Figure 10 This is a structural schematic diagram of the bent structure of the display panel in one embodiment;

[0033] Figure 11 This is a schematic diagram of the display panel structure in one embodiment;

[0034] Figure 12 This is a schematic diagram of the bending structure of the display panel in one embodiment;

[0035] Figure 13 This is eleventh of a schematic diagram of the bending structure of the display panel in one embodiment;

[0036] Figure 14 This is a schematic diagram of the display device in one embodiment;

[0037] Figure 15 This is a flowchart illustrating a method for manufacturing a bent structure for a display panel in one embodiment.

[0038] Explanation of reference numerals in the attached figures:

[0039] 110-Screen body, 120-Protective film layer, 10-Substrate, 20-Wire routing, 30-Protective structure, 40-Shrink adhesive layer, 41-Shrink adhesive structure, 50-First organic layer, 11-Polyimide layer, 12-Second organic layer, 200-Display area, 201-Bending area, 202-Bonding area, 300-Display device. Detailed Implementation

[0040] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0042] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.

[0043] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as “below,” “under,” or “below” will be oriented “above” the other element or feature. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0044] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. Furthermore, in the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if there is transmission of electrical signals or data between the connected objects.

[0045] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0046] The bending structure of the display panel provided in this application embodiment can be applied in the display panel to form the lower border area of ​​the display panel. Since the bending structure of the display panel can have a smaller bending radius, it can achieve the effect of shortening the lower border of the display panel.

[0047] The display panels in related technologies suffer from a problem of a large bottom bezel. The inventors discovered that this issue arises because the bottom bezel is routed with a bent wire, achieving a 180° bend. Due to the bending radius, the bottom bezel is relatively wide. For details, please refer to... Figure 1As shown, to protect the bending area of ​​the screen 110, a protective film layer 120 with water, gas, acid, and alkali resistance is applied to the bending area. During bending, the presence of the protective film layer 120 increases the bending radius R of the bending area, thus increasing the size of the bottom bezel of the display panel. In the prior art, a bending area protective liquid (BPL) is generally coated on the outside of the bending area of ​​the screen, and a protective film layer 120 is formed after curing. However, because the thickness of the formed protective film layer 120 is relatively large, the bending radius R of the bending area is large, and the size of the bottom bezel of the display panel is also large.

[0048] Based on the above-mentioned technical problems, the inventors have developed the technical solutions for the embodiments of the present invention.

[0049] In one embodiment, such as Figure 2 As shown, a bending structure for a display panel is provided. The bending structure includes: a substrate 10, a wiring layer, and a protective layer, wherein:

[0050] The routing layer includes multiple traces 20, which are located on one side of the substrate 10.

[0051] The substrate 10 can be made of a material with a supporting effect, such as polyimide (PI) as a substrate, on which metal traces 20 can be fabricated.

[0052] The protective layer is located on the side of the trace layer away from the substrate 10. The protective layer includes a plurality of spaced protective structures 30, each of which is correspondingly arranged with the trace 20. The projection of the protective structure 30 toward the substrate 10 at least partially overlaps with the projection of the trace 20 toward the substrate 10.

[0053] The protective structures 30 are spaced out and only located at positions corresponding to the traces 20. Since each protective structure 30 is a discrete design, not a single unit, the spaces between them are easier to bend because no protective structure exists there. Furthermore, each protective structure 30 is independent, so there is no tensile force between them during bending, resulting in lower bending stress. Additionally, no protective material is needed in the spaces between the protective structures 30, saving material.

[0054] For ease of subsequent description, the following is an example: Figure 2 The direction of the bending structure of the display panel shown is defined as follows: the direction from the base 10 to the protective layer is defined as the first direction F1, the direction extending along the trace is defined as the second direction F2, and the direction perpendicular to both the first direction F1 and the second direction F2 is defined as the third direction F3.

[0055] The projection of the protective structure 30 toward the base 10 and the projection of the trace 20 toward the base 10 can partially overlap or completely overlap. In the case of partial overlap, they can partially overlap in the first direction F1 or in the third direction F3. There is no limitation here, and it can be determined according to the actual needs.

[0056] The protective layer can be made using a protective colloid (BendingProtect Liquid, BPL), which is applied to create the protective layer. Alternatively, the protective layer can be made using inkjet printing (IJP), resulting in a thinner and more uniform layer that reduces bending stress and facilitates bending. Materials for the protective layer can include thermoplastic polyurethanes (TPU), polyethylene terephthalate (PET), and colorless polyimide (CPI), among others.

[0057] Inkjet printing (IJP) achieves precise coating of colloids by integrating thousands of micro-nozzles into the spray head. This process uses voltage to control the opening and closing of piezoelectric ceramics in each nozzle, extruding the colloid through a squeezing motion. IJP can produce very small droplets per stroke, ranging from 0.00003 to 0.00012 milligrams, thus enabling very thin BPL coatings and the application of arbitrary patterns.

[0058] The thickness of each protective structure 30 in the protective layer along the first direction F1 is not limited. For the same protective structure 30, the thickness of different portions extending along the second direction F2 along the first direction F1 may be the same or different, which is not limited here and can be determined according to actual needs.

[0059] In this embodiment, the bent structure of the display panel includes a substrate 10, a wiring layer, and a protective layer. The wiring layer includes multiple traces 20 capable of transmitting signals, and the multiple traces 20 are located on one side of the substrate 10. The protective layer is located on the side of the wiring layer away from the substrate 10 to protect the traces 20. The protective layer includes multiple spaced-apart protective structures 30, each corresponding to a trace 20. The projection of the protective structure 30 toward the substrate 10 at least partially overlaps with the projection of the trace 20 toward the substrate 10. Furthermore, the protective structures 30 are spaced apart and are only positioned at locations corresponding to the trace 20. On one hand, each protective structure 30 can protect one trace 20, achieving a good protective effect. On the other hand, where there is no trace 20, there is no need to design a protective structure 30, which facilitates bending of the display panel's bending structure and reduces the stress experienced during bending. This allows the bending structure to achieve a smaller bending radius, facilitating a shorter bottom bezel area when using this bending structure as the bottom bezel of the display panel.

[0060] In one embodiment, such as Figure 3 As shown, the cross-sectional area of ​​the protective structure 30 decreases along the first direction F1 from the base 10 toward the protective layer, and the cross-sectional plane is perpendicular to the first direction F1.

[0061] In this embodiment, the cross-sectional area of ​​the protective structure 30 decreases along the first direction F1. This design has two beneficial effects: Firstly, the cross-sectional area of ​​the contact surface between the protective structure 30 and the trace 20 is maximized, thus covering the trace 20 to the greatest extent possible. Secondly, the gradually decreasing cross-sectional area of ​​the protective structure 30 also facilitates its bending in the opposite direction of the first direction F1, achieving a smaller bending radius and saving costs.

[0062] In one embodiment, such as Figure 4 As shown, the surface of the protective structure 30 on the side away from the wiring layer is a cylindrical curved surface.

[0063] Among them, a portion of the cross-section of the protective structure 30 in the plane containing the first direction F1 and the third direction F3 is a curved surface, which can be an arc surface, specifically a circular arc surface or a semi-circular arc surface.

[0064] In this embodiment, a cylindrical curved surface is used as the surface of the protective structure 30 away from the wiring layer, so that the bending direction of this side of the protective structure 30 matches the bending direction, making it more adaptable to bending and reducing bending stress.

[0065] In one embodiment, see Figure 1-4The projection of the protective structure 30 toward the substrate 10 covers the projection of the trace 20 toward the substrate 10.

[0066] In this embodiment, the projection of the protective structure 30 toward the substrate 10 covers the projection of the trace 20 toward the substrate 10, so that the protective structure 30 can cover the trace 20 and completely isolate the trace 20 from the outside, thus better protecting the trace 20.

[0067] In one embodiment, such as Figure 5 As shown, the bending structure of the display panel also includes a shrink adhesive layer 40. The shrink adhesive layer 40 is located on the side of the substrate 10 away from the wiring layer.

[0068] The shrinkage adhesive layer 40 is made of a colloid with a high shrinkage rate, such as ultraviolet ray (UV) adhesive, which can reduce the yield stress on the substrate 10 when bent.

[0069] In this embodiment, by providing a shrinkage adhesive layer 40 on the underside of the substrate 10, shrinkage stress can be provided to the substrate 10, which helps the substrate 10 to bend and to some extent offsets the yield stress on the substrate 10 during bending, thereby reducing the bending radius.

[0070] In one embodiment, such as Figure 6 As shown, the shrink adhesive layer includes a plurality of spaced shrink adhesive structures 41, each shrink adhesive structure 41 corresponding to the trace 20, and the projection of the shrink adhesive structure 41 toward the substrate 10 at least partially overlaps with the projection of the trace 20 toward the substrate 10.

[0071] The projection of the shrink adhesive structure 41 toward the substrate 10 and the projection of the trace 20 toward the substrate 10 can partially overlap or completely overlap. In the case of partial overlap, they can partially overlap in the first direction F1 or in the third direction F3. There is no limitation here, and it can be determined according to the actual needs.

[0072] Optionally, the projection of the shrink adhesive structure 41 toward the substrate 10 covers the projection of the trace 20 toward the substrate 10, thereby providing greater shrinkage stress to the trace 20 and making it more conducive to bending of the trace 20.

[0073] In this embodiment, the shrink adhesive structure 41 is arranged at intervals. Since the shrink adhesive structure 41 is a discrete design and not a single piece, it is easier to bend. Furthermore, the shrink adhesive structure 41 is only arranged at the position corresponding to the trace 20. This is because the bending stress is greater at the position where the trace 20 is located, and the shrink adhesive offsets part of the bending stress, making it easier to bend.

[0074] In one embodiment, such as Figure 7As shown, the bent structure of the display panel also includes a first organic layer 50. The first organic layer 50 is disposed between the protective layer and the wiring layer.

[0075] In this embodiment, by setting the first organic layer 50, it can serve as an encapsulation layer for the trace 20, thereby achieving planarization and isolating the trace 20 from the external environment. Furthermore, by utilizing the better flexibility and plasticity of organic materials, it facilitates the bending of the display panel's bending structure.

[0076] In one embodiment, such as Figure 8 As shown, the substrate includes a polyimide layer 11 and a second organic layer 12. The second organic layer 12 is disposed between the polyimide layer 11 and the wiring layer.

[0077] For example, such as Figure 9 As shown, the bending structure of the display panel includes a polyimide layer 11, a first organic layer 50, a second organic layer 12, wiring 20, and a protective structure 30. Figure 10 As shown, the bending structure of the display panel includes a polyimide layer 11, a first organic layer 50, a second organic layer 12, a trace 20, a protective structure 30, and a shrink adhesive structure 41. Each film layer can be understood with reference to the explanation of the above embodiments, and will not be described again.

[0078] In this embodiment, the polyimide layer 11 serves as a substrate. The second organic layer 12 can serve as a planarization layer, utilizing the better flexibility and plasticity of organic materials to facilitate the bending of the display panel's bending structure.

[0079] Based on the same inventive concept, embodiments of the present invention also provide a display panel. For example... Figure 11 As shown, the display panel includes a display area 200, a bending area 201, and a bonding area 202. The bending area 201 is located between the display area 200 and the bonding area 202, and the bending area 201 includes the bending structure of the display panel provided in any of the above embodiments. Therefore, this display panel also has the beneficial effects of the bending structure of the display panel in the above embodiments. The similarities can be understood by referring to the explanation of the bending structure of the display panel above, and will not be repeated below.

[0080] In one embodiment, such as Figure 12 As shown, Figure 11 The diagram shows a partial enlarged view of the display area 200, bending area 201, and bonding area 202 of the display panel. Figure 12In the image, the display area 200, bending area 201, and bonding area 202 of the display panel are unfolded and not bent. It can be seen that the bending area 201 includes the wiring 20 of the bending structure of the display panel, and the protective structure 30 covering the wiring 20. Figure 11 From this perspective, only the protective structure 30 is visible, and the wiring 20 is covered by the protective structure 30.

[0081] A schematic diagram of the display area 200, bending area 201, and bonding area 202 of the display panel in the actual screen can be found here. Figure 1 As shown, the trace 20 within the bend area 201 is equivalent to Figure 1 The screen 110 in the middle is bent along the second direction F2, and the corresponding protective structure 20 is equivalent to Figure 1 The protective film layer 120 in the middle also bent.

[0082] In one embodiment, such as Figure 13 As shown, one end of the trace 20 is located in the display area 200 of the display panel, and the other end of the trace 20 is located in the bonding area 202 of the display panel.

[0083] The thickness of the protective structure 30 gradually decreases along the direction from near the display area 200 and the binding area 202 to far away from the display area 200 and the binding area 202.

[0084] The thickness of the protective structure is greater near the display and bonding areas and smaller further away from them. The direction from near the display and bonding areas to far away from them is defined as the fourth direction F4. The fourth direction F4 can be referenced... Figure 1 As shown.

[0085] In this embodiment, the closer the protective structure is to the display area and the bonding area, the smaller its bending amplitude; the farther away from the display area and the bonding area, the larger its bending amplitude. Therefore, the thickness of the protective structure is designed to gradually decrease along the second direction, so that the thickness of the protective structure with a larger bending amplitude is smaller, thus making it easier to bend, while the thickness of the protective structure with a smaller bending amplitude is larger, thus providing better protection.

[0086] Based on the same inventive concept, embodiments of the present invention also provide a display device 300. Figure 14 This is a schematic diagram of the structure of the display device 300 provided in an embodiment of the present invention, as shown below. Figure 14 As shown, the display device 300 includes any of the display panels provided in the above embodiments. Therefore, the display device 300 also has the beneficial effects of the display panels in the above embodiments. The similarities can be understood with reference to the explanation of the display panels above, and will not be repeated below.

[0087] In one embodiment, such as Figure 15 As shown, a method for manufacturing a bent structure for a display panel is provided, the method comprising:

[0088] Step S100: Provide a substrate.

[0089] Step S110: Form a wiring layer on one side of the substrate.

[0090] The wiring layer includes multiple wirings.

[0091] Step S120: A protective layer is formed on the side of the wiring layer away from the substrate using an inkjet printing process.

[0092] The protective layer includes multiple spaced protective structures, each corresponding to a trace, and the projection of the protective structure toward the substrate at least partially overlaps the projection of the trace toward the substrate.

[0093] In this embodiment, a substrate is first provided, and then a wiring layer is formed on one side of the substrate. This wiring layer enables signal transmission. A protective layer is then formed on the side of the wiring layer away from the substrate to protect the wiring. Since the protective layer is formed using inkjet printing, its thickness is thinner and more uniform, reducing bending stress. The protective layer includes multiple spaced-apart protective structures, each corresponding to a wiring. The projection of the protective structure toward the substrate at least partially overlaps the projection of the wiring toward the substrate. The protective structures are spaced apart and formed only at positions corresponding to the wiring. This ensures that each protective structure protects one wiring, achieving good protection. Furthermore, no protective structure is needed where there is no wiring, facilitating bending of the display panel's bending structure and reducing stress during bending. This allows for smaller bending radii, shortening the bottom bezel area when using this bending structure as the bottom bezel of the display panel.

[0094] In the description of this specification, references to terms such as "some embodiments," "other embodiments," and "ideal embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0095] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A bending structure for a display panel, characterized in that, The bending structure of the display panel includes: Base; A routing layer, comprising multiple traces located on one side of the substrate; A protective layer is located on the side of the trace layer away from the substrate. The protective layer includes a plurality of spaced-apart protective structures, each of which is corresponding to the trace. The projection of the protective structure toward the substrate at least partially overlaps the projection of the trace toward the substrate. A shrink adhesive layer is located on the side of the substrate away from the trace layer; the shrink adhesive layer includes a plurality of spaced-apart shrink adhesive structures, each shrink adhesive structure corresponding to the trace, and the projection of the shrink adhesive structure toward the substrate covers the projection of the trace toward the substrate.

2. The bending structure of the display panel according to claim 1, characterized in that, In a first direction from the substrate to the protective layer, the cross-sectional area of ​​the protective structure tends to be the same or decreasing, and the cross-sectional plane is perpendicular to the first direction.

3. The bending structure of the display panel according to claim 1 or 2, characterized in that, The surface of the protective structure on the side away from the wiring layer is a cylindrical curved surface.

4. The bending structure of the display panel according to claim 1 or 2, characterized in that, The projection of the protective structure toward the substrate covers the projection of the trace toward the substrate.

5. The bending structure of the display panel according to claim 1 or 2, characterized in that, The bending structure of the display panel further includes: a first organic layer disposed between the protective layer and the wiring layer. And / or, the substrate comprises: Polyimide layer; and A second organic layer is disposed between the polyimide layer and the wiring layer.

6. The bending structure of the display panel according to claim 1 or 2, characterized in that, One end of the trace is located in the display area of ​​the display panel, and the other end of the trace is located in the bonding area of ​​the display panel; The thickness of the protective structure gradually decreases along the direction from near the display area and the bonding area to away from the display area and the bonding area.

7. The bending structure of the display panel according to claim 1 or 2, characterized in that, The protective structure is manufactured using inkjet printing technology.

8. A display panel, characterized in that, The display panel includes a display area, a bending area, and a bonding area, wherein the bending area is located between the display area and the bonding area, and the bending area includes the bending structure of the display panel as described in any one of claims 1-7.

9. A method for manufacturing a bent structure for a display panel, characterized in that, The method is used to prepare a bent structure for the display panel according to any one of claims 1-7; the method includes: Provide a base; A routing layer is formed on one side of the substrate, the routing layer comprising multiple traces; A protective layer is formed on the side of the trace layer away from the substrate using an inkjet printing process. The protective layer includes a plurality of spaced-apart protective structures, each of which is corresponding to the trace. The projection of the protective structure toward the substrate at least partially overlaps the projection of the trace toward the substrate.

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