Display panel, preparation method of display panel and display terminal

Abstract

The embodiment of the invention provides a display panel, a preparation method of the display panel and a display terminal.The display panel comprises a display area and a non-display area, and the non-display area comprises a bending area used for bending; the bending area comprises a first flexible substrate and a functional layer which are stacked in sequence, and when the bending area is in a bending state, the functional layer is located on the side, away from the display area, of the first flexible substrate; the bending shape of the bending area is a rounded rectangle or an irregular arc, so that the overall bending radius of the bending area is small, and the frame of the display panel can be reduced. Furthermore, a groove is formed in the first flexible substrate in the bending area, so that the bending stress of the bending area can be reduced, and the risk of fracture of the functional layer is reduced.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of display technology, and in particular, to a display panel, a method for preparing a display panel, and a display terminal. Background Art

[0002] Organic Light Emitting Display (OLED) and flat-panel display devices based on technologies such as Light Emitting Diode (LED) have been widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc. due to their advantages such as high image quality, power saving, thin body and wide application range, becoming the mainstream in display devices.

[0003] However, the process performance of current OLED display products needs to be improved. Summary of the invention

[0004] In view of this, embodiments of the present application provide a display panel, a method for manufacturing a display panel, and a display terminal to at least partially solve the above problems.

[0005] According to a first aspect of an embodiment of the present application, a display panel is provided, comprising: a display area and a non-display area, the non-display area comprising a bending zone for bending; the bending zone comprises a first flexible substrate and a functional layer stacked in sequence, and when the bending zone is in a bent state, the functional layer is located on a side of the first flexible substrate away from the display area; the bending shape of the bending zone is a rounded rectangle or an irregular arc; a groove is arranged on the first flexible substrate.

[0006] In some optional embodiments, the bending shape of the bending area is a rounded rectangle, and the first flexible substrate is provided with a groove at a position corresponding to the rounded corner of the rounded rectangle.

[0007] In some optional embodiments, the bending shape of the bending zone is an irregular arc, the bending shape of the bending zone is an irregular arc, the first flexible substrate is provided with a groove at a target radius corresponding to the irregular arc, and the target radius is smaller than a preset threshold.

[0008] In some optional embodiments, the groove is located on a side of the first flexible substrate away from the functional layer.

[0009] In some optional embodiments, the groove runs through the first flexible substrate.

[0010] In some optional embodiments, the groove is filled with a waterproof material.

[0011] In some optional embodiments, the functional layer includes an insulating barrier layer and a metal wiring layer, the insulating barrier layer is stacked on the first flexible substrate, and the metal wiring layer is arranged on a side of the insulating barrier layer away from the first flexible substrate.

[0012] In some optional embodiments, the functional layer further includes a second flexible substrate, and the second flexible substrate is disposed between the insulating barrier layer and the metal wiring layer.

[0013] In some optional embodiments, the functional layer further includes a first planar layer, and the first planar layer is disposed between the second flexible substrate and the metal wiring layer.

[0014] In some optional embodiments, the functional layer further includes a second planar layer and an isolation layer, the isolation layer is stacked on a side of the metal wiring layer away from the first planar layer, and the second planar layer is stacked on a side of the isolation layer away from the metal wiring layer.

[0015] In some optional embodiments, the functional layer further includes a stress adjustment layer, and the stress adjustment layer is stacked on a side of the second planar layer away from the isolation layer.

[0016] According to a second aspect of an embodiment of the present application, a method for preparing a display panel is provided, comprising: providing a first flexible substrate, forming a functional layer on the first flexible substrate, the first flexible substrate and the functional layer being located in a bending zone in a non-display area of ​​the display panel, when the bending zone is in a bent state, the functional layer is located on a side of the first flexible substrate away from a display area of ​​the display panel; the bending shape of the bending zone is a rounded rectangle or an irregular arc; and a groove is opened on the first flexible substrate.

[0017] In some optional embodiments, opening a groove on the first flexible substrate includes: opening the groove on the first flexible substrate by a laser cutting process.

[0018] According to a third aspect of an embodiment of the present application, a display terminal is provided. The display terminal includes a terminal device body, and a display panel as described in the first aspect and arranged on the terminal device body.

[0019] According to the solution provided by the embodiment of the present application, the non-display area of ​​the display panel includes a bending area for bending; the bending area includes a first flexible substrate and a functional layer stacked in sequence, and when the bending area is in a bent state, the functional layer is located on the side of the first flexible substrate away from the display area of ​​the display panel; and the bending shape of the bending area is a rounded rectangle or an irregular arc, which can make the overall bending radius of the bending area smaller, thereby reducing the frame of the display panel. Furthermore, by providing a groove on the first flexible substrate in the bending area, the bending stress of the bending area can be reduced, and the risk of fracture of the functional layer can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0021] Figure 1 is a schematic diagram of a bending shape of a bending area of ​​a display panel according to an embodiment of the present application;

[0022] Figure 2 is a schematic diagram of a bending shape of a bending area of ​​a display panel according to another exemplary embodiment of the present application;

[0023] Figure 3 is a schematic structural diagram of a bending area of ​​a display panel according to an embodiment of the present application;

[0024] Figure 4 is a schematic structural diagram of a bending area of ​​a display panel according to another exemplary embodiment of the present application;

[0025] Figure 5 is a schematic structural diagram of a bending area of ​​a display panel according to another exemplary embodiment of the present application;

[0026] Figure 6 is a schematic structural diagram of a bending area of ​​a display panel according to another exemplary embodiment of the present application;

[0027] Figure 7 is a schematic structural diagram of a bending area of ​​a display panel according to another exemplary embodiment of the present application;

[0028] Figure 8 is a schematic structural diagram of a bending area of ​​a display panel according to another exemplary embodiment of the present application;

[0029] Fig. 9 is a schematic structural diagram of a bending area of ​​a display panel according to another exemplary embodiment of the present application;

[0030] Fig.10 is a flowchart of a method for preparing a display panel according to an exemplary embodiment of the present application;

[0031] Fig.11 is a schematic diagram of the structure of a display terminal according to another embodiment of the present application.

[0032] Description of reference numerals:

[0033] 1. Display panel;

[0034] 11. first flexible substrate; 111. groove

[0035] 12. Functional layer; 121. Insulating barrier layer; 122. Metal wiring layer; 123. Second flexible substrate; 124. First flat layer; 125. Isolation layer; 126. Second flat layer; 127. Stress adjustment layer. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the embodiments of the present application should fall within the scope of protection of the embodiments of the present application.

[0037] 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 of "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. It should also be understood that the term "and / or" used in the embodiments of the present application refers to and includes any or all possible combinations of one or more associated listed items.

[0038] It should be understood that in the description of the embodiments of the present application, the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the schemes of the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0039] In addition, when an element or layer is referred to as being “on,” “connected to,” or “coupled to” another element or layer, the element or layer may be directly on, directly connected to, or directly coupled to the other element or layer, or intervening elements or layers may be present. However, when an element or layer is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another element or layer, there are no intervening elements or layers present.

[0040] The terms first, second, etc. are used to describe various elements, components, regions, layers and / or parts, but these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, region, layer and / or part from another element, component, region, layer and / or part.

[0041] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0042] The specific implementation of the embodiment of the present application is further explained below in conjunction with the accompanying drawings of the embodiment of the present application.

[0043] Reference Figures 1 to 9 As shown, an embodiment of the present application provides a display panel 1, comprising: a display area and a non-display area, the non-display area comprising a bending zone for bending; the bending zone comprises a first flexible substrate 11 and a functional layer 12 stacked in sequence, and when the bending zone is in a bent state, the functional layer 12 is located on a side of the first flexible substrate 11 away from the display area; the bending shape of the bending zone is a rounded rectangle or an irregular arc; a groove 111 is provided on the first flexible substrate 11.

[0044] Exemplarily, the display panel 1 may be an organic light emitting display (OLED), which may generally include a display area and a non-display area, wherein the display area is used for displaying images, and the non-display area is the frame of the display panel 1, wherein the non-display area includes a bending zone for bending, and the non-display area can be partially folded to the back of the display panel 1 by bending the bending zone, thereby reducing the frame of the display panel 1.

[0045] The bending area of ​​the present embodiment includes a first flexible substrate 11 and a functional layer 12 which are stacked in sequence. The first flexible substrate 11 may be an organic material, such as a polyimide (PI) material, which has the characteristics of high temperature resistance, high insulation performance, and stable dielectric constant, and also has good bending performance. The functional layer 12 may include a metal wiring layer 122, etc. When the bending area is in a bent state, the functional layer 12 is located on a side of the first flexible substrate 11 away from the display area. It can be understood that when the bending area is in a bent state, the functional layer 12 is located on the periphery of the first flexible substrate 11, or the functional layer 12 surrounds the first flexible substrate 11.

[0046] Reference Figure 1The bending shape of the bending zone may be a rounded rectangle. Specifically, the bending shape of the bending zone may include one half of the rounded rectangle, that is, two adjacent rounded corners and a side between the two rounded corners. The radius of the rounded corner in the rounded rectangle is the bending radius of the bending zone. The use of the rounded rectangle bending shape can make the bending radius of the bending zone smaller, thereby further reducing the frame of the display panel 1; or, referring to Figure 2 The bending shape of the bending zone may also be an irregular arc. The irregular arc means that the radius at the first point is different from the radius at the second point on the arc. For example, the irregular arc may be an arc composed of a first arc with a radius of R1 and a second arc with a radius of R2, wherein the radius R1 is not equal to the radius R2. Similarly, the use of an irregular arc bending shape may make the bending radius (the smaller value of R1 and R2) of the bending zone smaller, thereby further reducing the frame of the display panel 1. Exemplarily, the bending radius of the present embodiment may be less than or equal to 0.2 mm.

[0047] The first flexible substrate 11 of this embodiment is provided with a groove 111, and the depth of the groove 111 may be less than or equal to the thickness of the first flexible substrate 11, and the thickness of the first flexible substrate 11 is usually 8um-10um. When the bending radius of the bending zone is reduced, the bending stress of the bending zone is likely to increase, thereby causing the risk of fracture of the functional layer 12. In this embodiment, by providing the groove 111 on the first flexible substrate 11, the bending stress of the bending zone can be reduced, and the risk of fracture of the functional layer 12 can be reduced.

[0048] In this embodiment, the non-display area of ​​the display panel 1 includes a bending area for bending; the bending area includes a first flexible substrate 11 and a functional layer 12 which are stacked in sequence, and when the bending area is in a bent state, the functional layer 12 is located on a side of the first flexible substrate 11 away from the display area of ​​the display panel 1; and the bending shape of the bending area is a rounded rectangle or an irregular arc, which can make the overall bending radius of the bending area smaller, thereby reducing the frame of the display panel 1. Furthermore, by providing a groove 111 on the first flexible substrate 11 in the bending area, the bending stress of the bending area can be reduced, and the risk of fracture of the functional layer 12 can be reduced.

[0049] In some optional embodiments, the bending shape of the bending area is a rounded rectangle, and the first flexible substrate 11 is provided with a groove 111 at a position corresponding to the rounded corner of the rounded rectangle.

[0050] For example, refer to Figure 3, the bending shape of the bending zone is a rounded rectangle, specifically including half of the rounded rectangle. When the bending shape of the bending zone is a rounded rectangle, the position where the bending stress in the bending zone is greater is the position where the rounded corner is located. The position where the rounded corner is located is usually the bending start position and the bending end position of the bending zone. As shown by the dotted lines in the figure, they are the bending start position and the bending end position of the bending zone respectively. The groove 111 is provided at the rounded position of the rounded rectangle corresponding to the first flexible substrate 11, which can reduce the bending stress of the bending zone. Preferably, the size of the groove 111 is determined according to the radius r of the rounded corner and the cutting accuracy. For example, the width of the groove 111 can be πr / 2+cutting accuracy, which is not limited in this embodiment.

[0051] In addition, in this embodiment, the groove 111 only needs to be provided at the rounded corner position of the first flexible substrate 11 corresponding to the rounded rectangle, which can reduce the bending stress and improve the processing efficiency.

[0052] In some optional embodiments, the bending shape of the bending zone is an irregular arc, the first flexible substrate 11 is provided with a groove 111 at a target radius corresponding to the irregular arc, and the target radius is less than a preset threshold.

[0053] For example, refer to Figure 4 If the bending shape of the bending zone is an irregular arc, the position with greater bending stress in the bending zone is the position corresponding to the target radius on the irregular arc. The target radius is less than the preset threshold value. The preset threshold value can be flexibly set by those skilled in the art according to actual conditions. For example, the preset threshold value can be 0.2 mm, which is not limited in this embodiment. The target radius can also be the minimum radius on the irregular arc. Usually, the position with the smallest radius on the irregular arc is located at the bending start position or the bending end position of the bending zone. As shown by the dotted lines in the figure, they are the bending start position and the bending end position of the bending zone, respectively. Then, a groove 111 can be set at the bending start position or the bending end position of the bending zone of the first flexible substrate 11. Preferably, the size of the groove 111 is determined according to the target radius r and the cutting accuracy. For example, the width of the groove 111 can be πr / 2+cutting accuracy, which is not limited in this embodiment.

[0054] In addition, in this embodiment, it is only necessary to provide the groove 111 at the position of the first flexible substrate 11 corresponding to the target radius of the irregular arc, so as to reduce the bending stress and improve the processing efficiency.

[0055] In some optional embodiments, the groove 111 is located on a side of the first flexible substrate 11 away from the functional layer 12 , and the groove 111 may penetrate the first flexible substrate 11 or may not penetrate the first flexible substrate 11 .

[0056] The groove 111 is filled with waterproof material.

[0057] The waterproof material may be a waterproof protective glue. Providing the groove 111 on the first flexible substrate 11 may reduce the mechanical and waterproof properties of the first flexible substrate 11. Filling the groove with the waterproof material may improve the mechanical and waterproof properties of the first flexible substrate 11.

[0058] In some optional embodiments, the functional layer 12 includes an insulating barrier layer 121 and a metal wiring layer 122 , the insulating barrier layer 121 is stacked on the first flexible substrate 11 , and the metal wiring layer 122 is arranged on a side of the insulating barrier layer 121 away from the first flexible substrate 11 .

[0059] For example, refer to Figure 5 The insulating barrier layer 121 can be made of inorganic materials, such as silicon oxide materials, which have good insulation properties and can play an anti-static role. The metal routing layer 122 is used to arrange metal routing and has good conductivity. The metal routing layer 122 can be made of aluminum Al or other metal alloys, which is not limited in this embodiment. The insulating barrier layer 121 is stacked on the first flexible substrate 11, and the metal routing layer 122 is arranged on the side of the insulating barrier layer 121 away from the first flexible substrate 11. In this embodiment, the insulating barrier layer 121 can prevent external static electricity from causing adverse effects on the circuit of the metal routing layer 122.

[0060] In some optional embodiments, the functional layer 12 further includes a second flexible substrate 123 , and the second flexible substrate 123 is disposed between the insulating barrier layer 121 and the metal wiring layer 122 .

[0061] For example, refer to Figure 6 The second flexible substrate 123 may be an organic material, such as PET (Polyethylene terephthalate), PI (Polyimide) or PEN (Polyethylene naphthalate diformic acid glycol ester). The second flexible substrate 123 is disposed between the insulating barrier layer 121 and the metal wiring layer 122, and may further protect the circuit of the metal wiring layer 122.

[0062] In some optional embodiments, the functional layer 12 further includes a first planar layer 124 , and the first planar layer 124 is disposed between the second flexible substrate 123 and the metal wiring layer 122 .

[0063] For example, refer to Figure 7The first planar layer 124 can be made of organic material with good insulation. The first planar layer 124 is arranged between the second flexible substrate 123 and the metal wiring layer 122 for interlayer planarization. At the same time, it can protect the circuit of the metal wiring layer 122.

[0064] In some optional embodiments, the functional layer 12 further includes a second planar layer 126 and an isolation layer 125 , wherein the isolation layer 125 is stacked on a side of the metal wiring layer 122 facing away from the first planar layer 124 , and the second planar layer 126 is stacked on a side of the isolation layer 125 facing away from the metal wiring layer 122 .

[0065] For example, refer to Figure 8 The second planar layer 126 may be an organic material with good insulation and is used for interlayer planarization. The isolation layer 125 may be an organic material, such as an organic glue material, a polyimide (PI) material, etc., and may play a supporting role. The isolation layer 125 is stacked on the side of the metal wiring layer 122 away from the first planar layer 124, so as to protect the circuit of the metal wiring layer 122.

[0066] In some optional embodiments, the functional layer 12 further includes a stress adjustment layer 127 , and the stress adjustment layer 127 is stacked on a side of the second planar layer 126 facing away from the isolation layer 125 .

[0067] For example, refer to Fig. 9 The stress adjustment layer 127 can be made of UV glue, which is also called photosensitive glue, ultraviolet light curing glue, shadowless glue, etc. It is a type of adhesive that can only be cured by ultraviolet light. The stress adjustment layer 127 is used to adjust the position of the stress center layer in the bending zone. When the bending zone is in a bending state, the stress center layer is a critical surface. The stress center layer will not be subjected to tensile stress or compressive stress during the bending process. The film layer located on the side of the stress center layer close to the convex side (i.e., the outer side of the bending zone) will be subjected to tensile stress, and the film layer located on the side of the stress center layer away from the convex side (i.e., the inner side of the bending zone) will be subjected to compressive stress. The closer the film layer is to the stress center layer, the smaller the stress it is subjected to.

[0068] In this embodiment, the stress adjustment layer 127 can be added to make the metal wiring layer 122 as close to the stress center layer as possible, thereby reducing the stress on the metal wiring layer 122 and reducing the risk of metal wiring breakage.

[0069] It should be understood that since the bending zone includes the first flexible substrate 11 and the functional layer 12, the functional layer 12 includes the insulating barrier layer 121, the second flexible substrate 123, the first flat layer 124, the metal wiring layer 122, the second flat layer 126, the isolation layer 125 and the stress adjustment layer 127, wherein the bending stress of the bending zone is proportional to the film thickness of the bending zone and inversely proportional to the bending radius. The embodiment of the present application can reduce the film thickness of the bending zone by providing the groove 111 on the first flexible substrate 11, thereby reducing the bending stress of the bending zone and reducing the risk of the metal wiring layer 122 wiring breakage.

[0070] Reference Fig.10 As shown, according to the second aspect of the embodiment of the present application, a method for preparing a display panel is provided. The method of this embodiment specifically includes the following steps:

[0071] S1001. Provide a first flexible substrate, and form a functional layer on the first flexible substrate.

[0072] Among them, the first flexible substrate and the functional layer are located in the bending zone in the non-display area of ​​the display panel. When the bending zone is in a bent state, the functional layer is located on the side of the first flexible substrate away from the display area of ​​the display panel; the bending shape of the bending zone is a rounded rectangle or an irregular arc.

[0073] Exemplarily, the display panel may be an organic light emitting display (OLED), which may generally include a display area and a non-display area, wherein the display area is used for displaying images, and the non-display area is the frame of the display panel, wherein the non-display area includes a bending zone for bending, and the non-display area can be partially folded to the back of the display panel by bending the bending zone, thereby reducing the frame of the display panel.

[0074] The bending area of ​​the present embodiment includes a first flexible substrate and a functional layer stacked in sequence. The first flexible substrate may be an organic material, such as a polyimide (PI) material, which has the characteristics of high temperature resistance, high insulation performance, and stable dielectric constant, and also has good bending performance. The functional layer may include a metal wiring layer, etc. When the bending area is in a bent state, the functional layer is located on a side of the first flexible substrate away from the display area. It can be understood that when the bending area is in a bent state, the functional layer is located on the periphery of the first flexible substrate, or the functional layer surrounds the first flexible substrate.

[0075] The bending shape of the bending zone can be a rounded rectangle. Specifically, the bending shape of the bending zone can include one half of the rounded rectangle, that is, two adjacent rounded corners and an edge between the two rounded corners. The radius of the rounded corner in the rounded rectangle is the bending radius of the bending zone. The use of a rounded rectangle bending shape can make the bending radius of the bending zone smaller, thereby further reducing the border of the display panel; or, the bending shape of the bending zone can also be an irregular arc. The irregular arc means that the radius at the first point and the radius at the second point on the arc are different. For example, the irregular arc can be an arc composed of a first arc with a radius of R1 and a second arc with a radius of R2, wherein the radius R1 is not equal to the radius R2. Similarly, the use of an irregular arc bending shape can make the bending radius of the bending zone (the smaller value of R1 and R2) smaller, thereby further reducing the border of the display panel. Exemplarily, the bending radius of this embodiment can be less than or equal to 0.2 mm.

[0076] S1002, opening a groove on the first flexible substrate.

[0077] Exemplarily, a groove is provided on the first flexible substrate, and the depth of the groove may be less than or equal to the thickness of the first flexible substrate, and the thickness of the first flexible substrate is usually 8um-10um. When the bending radius of the bending zone is reduced, the bending stress of the bending zone is easily increased, which in turn leads to the risk of fracture of the functional layer. In this embodiment, by providing a groove on the first flexible substrate, the bending stress of the bending zone can be reduced, and the risk of fracture of the functional layer can be reduced.

[0078] In this embodiment, the non-display area of ​​the display panel includes a bending area for bending; the bending area includes a first flexible substrate and a functional layer stacked in sequence, and when the bending area is in a bent state, the functional layer is located on a side of the first flexible substrate away from the display area of ​​the display panel; and the bending shape of the bending area is a rounded rectangle or an irregular arc, which can make the overall bending radius of the bending area smaller, thereby reducing the frame of the display panel. Furthermore, by providing a groove on the first flexible substrate in the bending area, the bending stress of the bending area can be reduced, and the risk of fracture of the functional layer can be reduced.

[0079] In some optional embodiments, opening a groove on the first flexible substrate includes: opening the groove on the first flexible substrate by a laser cutting process.

[0080] Exemplarily, laser cutting is one of the thermal cutting methods, which uses a focused high-power density laser beam to irradiate the workpiece, causing the irradiated material to melt, vaporize, ablate or reach the ignition point quickly, and at the same time, uses a high-speed airflow coaxial with the beam to blow away the molten material, thereby achieving the cutting of the workpiece. In this embodiment, the insulating barrier layer in the functional layer is stacked on the first flexible substrate, the first flexible substrate is an organic material, the insulating barrier layer is an inorganic material, and the melting points of the first flexible substrate and the insulating barrier layer are different. Therefore, the first flexible substrate can be cut by a laser cutting process to achieve the opening of a groove on the first flexible substrate.

[0081] In this embodiment, a groove is formed on the first flexible substrate by a laser cutting process. By utilizing the high precision of laser cutting, the range and size of the cut groove can be precisely controlled.

[0082] In some optional embodiments, the bending shape of the bending area is a rounded rectangle, and a groove is provided on the first flexible substrate, including: the groove is provided at a rounded position of the first flexible substrate corresponding to the rounded rectangle.

[0083] When the bending shape of the bending zone is a rounded rectangle, the position where the bending stress in the bending zone is greater is the position where the rounded corner is located. The bending stress of the bending zone can be reduced by providing a groove at the rounded corner position of the first flexible substrate corresponding to the rounded rectangle. Preferably, the size of the groove is determined according to the radius of the rounded corner and the cutting accuracy, which is not limited in this embodiment. In addition, in this embodiment, it is only necessary to provide a groove at the rounded corner position of the first flexible substrate corresponding to the rounded rectangle, which can reduce the bending stress and improve the processing efficiency.

[0084] In some optional embodiments, the bending shape of the bending zone is an irregular arc, and a groove is provided on the first flexible substrate, including: the first flexible substrate is provided with a groove at a target radius corresponding to the irregular arc, and the target radius is smaller than a preset threshold.

[0085] If the bending shape of the bending zone is an irregular arc, the position with greater bending stress in the bending zone is the position corresponding to the target radius on the irregular arc. The target radius is less than the preset threshold value. The preset threshold value can be flexibly set by those skilled in the art according to actual conditions. For example, the preset threshold value can be 0.2 mm, and this embodiment does not limit this. The target radius can also be the minimum radius on the irregular arc. Usually, the position with the smallest radius on the irregular arc is located at the bending starting position or the bending ending position of the bending zone. In this case, a groove can be set at the bending starting position or the bending ending position of the first flexible substrate corresponding to the bending zone. Preferably, the size of the groove is determined according to the target radius and the cutting accuracy, and this embodiment does not limit this. In addition, this embodiment only needs to set a groove at the target radius of the irregular arc corresponding to the first flexible substrate, which can reduce the bending stress while improving the processing efficiency.

[0086] In some optional embodiments, the groove is filled with a waterproof material.

[0087] The waterproof material may be a waterproof protective glue. Providing a groove on the first flexible substrate may reduce the mechanical and waterproof properties of the first flexible substrate. Filling the groove with the waterproof material may improve the mechanical and waterproof properties of the first flexible substrate.

[0088] In some optional embodiments, the functional layer includes an insulating barrier layer and a metal routing layer, and forming the functional layer on the first flexible substrate includes: stacking the insulating barrier layer on the first flexible substrate, and setting the metal routing layer on a side of the insulating barrier layer away from the first flexible substrate.

[0089] The insulating barrier layer can be made of inorganic materials, such as silicon oxide materials, which has good insulation and can play an anti-static role. The metal routing layer is used to arrange metal routing and has good conductivity. The metal routing layer can be made of aluminum Al or other metal alloys, which is not limited in this embodiment. The insulating barrier layer is stacked on the first flexible substrate, and the metal routing layer is arranged on the side of the insulating barrier layer away from the first flexible substrate. This embodiment can prevent external static electricity from causing adverse effects on the circuit of the metal routing layer through the insulating barrier layer.

[0090] In some optional embodiments, the functional layer further includes a second flexible substrate, and forming the functional layer on the first flexible substrate further includes: arranging the second flexible substrate between the insulating barrier layer and the metal wiring layer.

[0091] The second flexible substrate may be an organic material, for example, PET (Polyethylene terephthalate), PI (Polyimide) or PEN (Polyethylene naphthalatetwo formic acid glycol ester), etc. The second flexible substrate is disposed between the insulating barrier layer and the metal wiring layer, and can further protect the circuit of the metal wiring layer.

[0092] In some optional embodiments, the functional layer further includes a first planar layer, and forming the functional layer on the first flexible substrate further includes: arranging the first planar layer between the second flexible substrate and the metal wiring layer.

[0093] The first planar layer may be made of an organic material with good insulation properties. The first planar layer is disposed between the second flexible substrate and the metal wiring layer for interlayer planarization and can protect the circuit of the metal wiring layer.

[0094] In some optional embodiments, the functional layer also includes a second flat layer and an isolation layer. The functional layer is formed on the first flexible substrate, and also includes: stacking the isolation layer on the side of the metal routing layer away from the first flat layer, and stacking the second flat layer on the side of the isolation layer away from the metal routing.

[0095] The second planarization layer can be an organic material with good insulation properties and is used for interlayer planarization. The isolation layer can be an organic material, such as an organic gel material, a polyimide (PI) material, etc., and can play a supporting role. The isolation layer is stacked on the side of the metal wiring layer away from the first planarization layer to protect the circuit of the metal wiring layer.

[0096] In some optional embodiments, the functional layer further includes a stress adjustment layer, and forming the functional layer on the first flexible substrate further includes: stacking the stress adjustment layer on a side of the second planar layer away from the isolation layer.

[0097] The stress adjustment layer can be made of UV glue, which is also called photosensitive glue, ultraviolet light curing glue, shadowless glue, etc. It is a type of adhesive that can only be cured by ultraviolet light. By adding a stress adjustment layer, the metal wiring layer can be as close to the stress center layer as possible, thereby reducing the stress on the metal wiring layer and reducing the risk of metal wiring breakage.

[0098] An embodiment of the present application further provides a display terminal, which includes a terminal device body and a display panel arranged on the terminal device body. The display panel may be the display panel as described above.

[0099] An exemplary display terminal is as follows Fig.11 As shown, it includes a terminal device body 10 and a display panel 1. The display panel 1 is disposed on the terminal device body 10 and is electrically connected to the terminal device body 10. The display panel 1 is the display panel 1 described in the above embodiment, and is used to display static images or dynamic images.

[0100] Exemplarily, the above-mentioned display terminal can be implemented in the form of various electronic devices such as mobile phones, tablet computers, handheld computers, PADs, etc.

[0101] The above implementation methods are only used to illustrate the embodiments of the present application, and are not limitations on the embodiments of the present application. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the embodiments of the present application. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present application. The scope of patent protection of the embodiments of the present application should be limited by the claims.

Claims

1. A display panel, characterized in that: include: A display area and a non-display area, wherein the non-display area includes a bending area for bending; The bending area comprises a first flexible substrate and a functional layer which are stacked in sequence, and when the bending area is in a bent state, the functional layer is located on a side of the first flexible substrate away from the display area; the bending shape of the bending area is a rounded rectangle or an irregular arc; The first flexible substrate is provided with a groove.

2. The display panel according to claim 1, characterized in that: The bending shape of the bending area is a rounded rectangle, and the first flexible substrate is provided with the groove at a position corresponding to the rounded corner of the rounded rectangle.

3. The display panel according to claim 1, characterized in that: The bending shape of the bending area is an irregular arc, and the first flexible substrate is provided with the groove at a target radius corresponding to the irregular arc, and the target radius is smaller than a preset threshold.

4. The display panel according to any one of claims 1 to 3, characterized in that: The groove is located at a side of the first flexible substrate away from the functional layer; Preferably, the groove runs through the first flexible substrate; Preferably, the groove is filled with waterproof material.

5. The display panel according to any one of claims 1 to 3, characterized in that: The functional layer includes an insulating barrier layer and a metal wiring layer. The insulating barrier layer is stacked on the first flexible substrate, and the metal wiring layer is arranged on a side of the insulating barrier layer away from the first flexible substrate.

6. The display panel according to claim 5, characterized in that: The functional layer further includes a second flexible substrate, which is disposed between the insulating barrier layer and the metal wiring layer.

7. The display panel according to claim 6, characterized in that: The functional layer further includes a first planar layer, and the first planar layer is arranged between the second flexible substrate and the metal wiring layer.

8. The display panel according to claim 7, characterized in that: The functional layer further includes a second planar layer and an isolation layer. The isolation layer is stacked on a side of the metal wiring layer away from the first planar layer, and the second planar layer is stacked on a side of the isolation layer away from the metal wiring layer.

9. The display panel according to claim 8, characterized in that: The functional layer further includes a stress adjustment layer, which is stacked on a side of the second planar layer away from the isolation layer.

10. A method for preparing a display panel, characterized in that: include: A first flexible substrate is provided, and a functional layer is formed on the first flexible substrate, wherein the first flexible substrate and the functional layer are located in a bending area in a non-display area of ​​a display panel, and when the bending area is in a bent state, the functional layer is located on a side of the first flexible substrate away from a display area of ​​the display panel; the bending shape of the bending area is a rounded rectangle or an irregular arc, and the irregular arc means that the radius at a first point on the arc line is different from the radius at a second point; A groove is formed on the first flexible substrate.

11. The method for preparing a display panel according to claim 10, characterized in that: The step of forming a groove on the first flexible substrate comprises: A groove is formed on the first flexible substrate by a laser cutting process.

12. A display terminal, characterized in that: The display terminal comprises a terminal device body, and a display panel as claimed in any one of claims 1 to 9 arranged on the terminal device body.

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