Display panel, preparation method thereof and display device

Abstract

Embodiments of the present application provide a display panel, a preparation method thereof and a display device. The display panel comprises: a light-emitting functional layer comprising a plurality of light-emitting units distributed at intervals; an encapsulation layer located on one side of the light-emitting functional layer and used for encapsulating the plurality of light-emitting units; a touch substrate layer arranged on a side of the encapsulation layer away from the light-emitting functional layer; a touch functional layer arranged on a side of the touch substrate layer away from the encapsulation layer, the touch functional layer having a metal wiring area and a non-metal wiring area arranged adjacent to the metal wiring area, the touch functional layer comprising touch wires, the touch wires being located in the metal wiring area; and a protective layer arranged on a side of the touch functional layer away from the touch substrate layer and covering at least the touch wires in the metal wiring area. The protective layer is provided with a groove, the groove extending along the thickness direction of the display panel, the orthographic projection of the groove on the touch substrate layer being located within the orthographic projection of the touch functional layer on the touch substrate layer, and the number of the grooves being two or more.

Description

Technical Field

[0001] This application relates to the field of display device technology, and in particular to a display panel, a method for manufacturing the same, and a display device. Background Technology

[0002] The traditional TP (Touch Panel Layer) structure consists of an inorganic substrate, a first metal layer, an inorganic insulating layer, a second metal layer, and an OC (Optical Clear Protective Layer). Among these, the one or more metal layers in the TP structure serve as the primary carrier for signal transmission between the touchscreen and the integrated circuit (IC), making them particularly important. Therefore, ensuring the lifespan and stability of the metal traces corresponding to the metal layers is a primary goal for improving the performance of display panel products. The OC organic protective layer completely encapsulates the metal layers to isolate them from external water and oxygen, thereby improving the corrosion resistance of the metal layers. However, when products containing the above-mentioned TP structure, such as foldable, 2.5D, and 3D display panels, are subjected to external stress, excessive stress or prolonged stress can cause cracking of the corresponding metal layer traces in the display panel, and in severe cases, even open circuits, thus affecting the touch performance of the display panel. Currently, there is no satisfactory solution. Summary of the Invention

[0003] This application provides a display panel, a method for manufacturing the same, and a display device, which aims to improve the stress resistance of the protective layer and metal layer in the display panel, so as to effectively improve the cracking or even open circuit of the metal layer in the film layer of the touch panel.

[0004] An embodiment of the first aspect of this application provides a display panel, comprising: a light-emitting functional layer including a plurality of spaced light-emitting units; an encapsulation layer located on one side of the light-emitting functional layer and used to encapsulate the plurality of light-emitting units; a touch substrate layer disposed on the side of the encapsulation layer opposite to the light-emitting functional layer; a touch functional layer disposed on the side of the touch substrate layer opposite to the encapsulation layer, the touch functional layer having a metal trace area and a non-metal trace area disposed adjacent to the metal trace area, the touch functional layer including at least touch traces located in the metal trace area; and a protective layer disposed on the side of the touch functional layer opposite to the touch substrate layer and at least covering the touch traces in the metal trace area; wherein the protective layer is provided with grooves extending along the thickness direction of the display panel, the orthographic projection of the grooves on the touch substrate layer is located within the orthographic projection of the touch functional layer on the touch substrate layer, and the number of grooves is two or more.

[0005] According to an embodiment of the first aspect of this application, the protective layer includes an upper surface and a lower surface that are opposite to each other along its own thickness direction.

[0006] According to an embodiment of the first aspect of this application, at least one groove is recessed from the upper surface of the protective layer toward the touch substrate layer.

[0007] According to an embodiment of the first aspect of this application, at least one groove is recessed from the lower surface of the protective layer to the upper surface of the protective layer.

[0008] According to an embodiment of the first aspect of this application, at least one groove extends from the upper surface and the lower surface of the protective layer toward the middle of the thickness direction of the protective layer.

[0009] According to an embodiment of the first aspect of this application, at least one groove is located between the upper and lower surfaces of the protective layer.

[0010] According to an embodiment of the first aspect of this application, at least one groove is disposed in the middle between the upper and lower surfaces of the protective layer.

[0011] According to an embodiment of the first aspect of this application, at least one groove is located in the metal wiring area.

[0012] According to an embodiment of the first aspect of this application, at least one groove is located in a non-metallic wiring area.

[0013] According to an embodiment of the first aspect of this application, at least one tank is located in a metal trace area and a non-metal trace area, respectively.

[0014] According to an embodiment of the first aspect of this application, a plurality of slots are spaced apart along the extension direction of the touch trace.

[0015] According to the first aspect of this application, the groove extends along a preset path, and the preset path of the groove is parallel or perpendicular to the extension path of the touch wiring.

[0016] According to the embodiment of the first aspect of this application, two or more tanks are arranged at equal heights in the protective layer.

[0017] According to the first aspect of the present application, the orthographic projection of the groove onto the touch substrate layer is any one of the following shapes or a combination of two or more shapes: rectangle, rounded rectangle, circle, ellipse, waist-shaped hole, triangle, parallelogram.

[0018] According to an embodiment of the first aspect of this application, the protective layer includes two or more sub-layers, each of which has a groove.

[0019] According to an embodiment of the first aspect of this application, the cross-section of the tank gradually decreases along the thickness direction of the protective layer itself, from the side closest to the metal layer to the side away from the substrate layer.

[0020] According to an embodiment of the first aspect of this application, the groove is a through groove located in the non-metallic wiring area.

[0021] According to an embodiment of the first aspect of this application, multiple slots are spaced apart corresponding to the non-metallic trace area.

[0022] According to an embodiment of the first aspect of this application, corresponding to the non-metallic trace area, the orthogonal projection of multiple grooves on the touch substrate layer is distributed in a ring.

[0023] According to an embodiment of the first aspect of this application, corresponding to the non-metallic trace area, the orthogonal projections of multiple grooves on the touch substrate layer are distributed in an array.

[0024] According to the embodiment of the first aspect of this application, corresponding to the non-metallic trace area, two or more grooves are set at equal heights in the protective layer.

[0025] According to the first aspect of the present application, corresponding to the non-metallic trace area, the orthographic projection of the groove on the touch substrate layer is any one of the following shapes or a combination of two or more shapes: rectangle, rounded rectangle, circle, ellipse, waist-shaped hole, triangle, parallelogram.

[0026] According to the first aspect of this application, corresponding to the non-metallic trace area, the cross-section of the groove gradually decreases along the thickness direction of the protective layer itself, from the side closer to the touch function layer to the side away from the touch substrate layer.

[0027] According to an embodiment of the first aspect of this application, the touch trace includes: a first touch layer, the first touch layer including a bridge trace; an insulating layer located on the side of the first touch layer opposite to the touch substrate layer; and a second touch layer located on the side of the insulating layer opposite to the first touch layer, the second touch layer including two or more touch electrodes, at least two touch electrodes being connected to the bridge trace vias and electrically connected to each other through the bridge traces.

[0028] According to an embodiment of the first aspect of this application, the insulating layer is provided with a via recessed into the touch substrate layer, and the protective layer is connected to the touch substrate layer through the via.

[0029] An embodiment of the second aspect of this application provides a method for manufacturing a display panel, comprising: disposing an encapsulation layer on a light-emitting functional layer, the light-emitting functional layer including a plurality of spaced light-emitting units, the encapsulation layer being used to encapsulate the plurality of light-emitting units; preparing a touch substrate layer on the side of the encapsulation layer opposite to the light-emitting functional layer; preparing a touch functional layer on the side of the touch substrate layer opposite to the encapsulation layer, the touch functional layer having a metal trace area and a non-metal trace area disposed adjacent to the metal trace area, the touch functional layer including at least touch traces located in the metal trace area; disposing a protective layer on the side of the touch functional layer opposite to the touch substrate layer, the protective layer at least covering the touch traces in the metal trace area, wherein the protective layer is provided with grooves, the grooves extending along the thickness direction of the display panel, the orthographic projection of the grooves on the touch substrate layer being located within the orthographic projection of the touch functional layer on the touch substrate layer, and the number of grooves being two or more.

[0030] According to an embodiment of the second aspect of this application, before the step of setting a protective layer on the side of the touch functional layer away from the touch substrate layer, the method further includes: setting a protective material layer on one side of the carrier plate; and patterning the protective material layer to form a protective layer including a groove.

[0031] According to an embodiment of the second aspect of this application, in the step of setting a protective layer on the side of the touch functional layer away from the touch substrate layer, a protective layer having a groove is set on the side of the touch functional layer away from the touch substrate layer.

[0032] According to an embodiment of the second aspect of this application, in the step of setting a protective layer on the side of the touch functional layer away from the touch substrate layer, the side of the protective layer having a groove is set on the side of the touch functional layer away from the touch substrate layer.

[0033] According to an embodiment of the second aspect of this application, in the step of setting a protective layer on the side of the touch functional layer away from the touch substrate layer, the side of the protective layer away from the groove is attached to the touch functional layer.

[0034] According to an embodiment of the second aspect of this application, the depth of the groove is less than the thickness of the protective layer corresponding to the metal trace area.

[0035] According to an embodiment of the second aspect of this application, before the step of providing a protective layer on the side of the touch functional layer opposite to the touch substrate layer, the method further includes:

[0036] A protective material layer is provided on the side of the touch function layer away from the touch substrate layer, and the protective material layer is patterned to form a protective layer including the groove.

[0037] According to an embodiment of the second aspect of this application, in the step of providing a protective material layer on the side of the touch functional layer away from the touch substrate layer and patterning the protective material layer to form a protective layer including a groove: a first sub-protective material layer is provided on the side of the touch functional layer away from the touch substrate layer; the first sub-protective material layer is patterned to form a groove; a second sub-protective material layer is provided on the side of the first sub-protective material layer away from the touch functional layer to form a protective layer, wherein the groove opening of the protective layer faces the touch functional layer.

[0038] According to an embodiment of the second aspect of this application, the depth of the groove corresponding to the metal trace area is less than the thickness of the protective layer.

[0039] According to an embodiment of the second aspect of this application, before the step of setting a protective layer on the side of the touch functional layer away from the touch substrate layer, the method further includes: setting a first sub-protective material layer on one side of the carrier plate; and patterning one side of the first sub-protective material layer to form a first sub-protective material layer including a groove on one side.

[0040] According to an embodiment of the second aspect of this application, in the step of forming a protective layer including a groove by providing a protective material layer on the side of the touch functional layer away from the touch substrate layer and patterning the protective material layer: the side of the first sub-protective material layer away from the groove is attached to the side of the touch functional layer away from the touch substrate layer; a second sub-material layer is provided on the side of the first sub-protective material layer away from the touch functional layer to form a protective layer, and the groove is located between the upper surface and the lower surface of the protective layer.

[0041] According to an embodiment of the second aspect of this application, the depth of the groove corresponding to the metal trace area is less than the thickness of the protective layer.

[0042] According to an embodiment of the second aspect of this application, in the step of providing a protective material layer on the side of the touch functional layer away from the touch substrate layer and patterning the protective material layer to form a protective layer including a groove: providing a protective material layer on the side of the touch functional layer away from the touch substrate layer; patterning the protective material layer to form a protective layer including a groove, wherein the opening of the groove faces away from the touch functional layer.

[0043] According to an embodiment of the second aspect of this application, the depth of the trench is less than the thickness of the protective layer for the metal trace area; and the depth of the trench is less than or equal to the thickness of the protective layer for the non-metal trace area.

[0044] An embodiment of the third aspect of this application provides a display device, including a housing and a display panel provided by an embodiment of the first aspect of this application, mounted in the housing.

[0045] The display panel, its manufacturing method, and display device provided in this application embodiment include a protective layer for the touch traces that at least cover the touch functional layer corresponding to the metal trace area. Two or more grooves are provided on the protective layer corresponding to the metal trace area and on the side of the touch traces away from the touch substrate layer. This makes the protective layer at least partially become a mesh structure along the thickness direction of the display panel. The grooves provide deformation space for the protective layer when subjected to external stress, increasing the deformation range of the protective layer itself, thereby enhancing the buffering effect of the protective layer against stress and strengthening the buffering effect of the protective layer on the stress of the display panel itself when bent. Furthermore, by providing at least a partial release of the stress borne by the touch traces themselves when bent or subjected to external stress, the deformation range of the touch traces is increased, improving the stress resistance of the touch traces, thereby increasing the stress borne by the entire display panel. This effectively improves the phenomenon of cracks or even open circuits in the touch traces of the touch functional layer, improving the product stability and service life of the display panel including the touch functional layer and the protective layer. Attached Figure Description

[0046] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings, wherein the same or similar reference numerals denote the same or similar features.

[0047] Figure 1 This is an enlarged view of a partial area of ​​the display panel in one embodiment.

[0048] Figure 2 yes Figure 1 Enlarged view of the local structure of part B.

[0049] Figure 3 It is along Figure 2 A schematic diagram of a partial cross-sectional view of the structure along the mid-section line AA.

[0050] Figure 4 In another embodiment, the display panel along Figure 2 A schematic diagram of a partial cross-sectional view of the structure along the mid-section line AA.

[0051] Figure 5 In another embodiment, the display panel edge Figure 2 Partial sectional view of the structure along the mid-section line AA.

[0052] Figure 6 In another embodiment, the display panel edge Figure 2 Partial sectional view of the structure along the mid-section line AA.

[0053] Figure 7 This is a magnified view of a portion of the structure in another embodiment, specifically part B.

[0054] Figure 8This is a magnified view of a portion of the structure in another embodiment, specifically part B.

[0055] Figure 9 In another embodiment, the display panel along Figure 2 A schematic diagram of a partial cross-sectional view of the structure along the mid-section line AA.

[0056] Figure 10 In another embodiment, the display panel along Figure 2 A schematic diagram of a partial cross-sectional view of the structure along the mid-section line AA.

[0057] Figure 11 This is a partial enlarged view of part B in yet another embodiment.

[0058] Figure 12 A type of display panel edge Figure 11 A schematic diagram of a partial cross-sectional view of the structure along the mid-section line AA.

[0059] Figure 13 This is a schematic diagram of a partial cross-sectional structure of another display panel along section line AA.

[0060] Figure 14 This is a schematic flowchart of a method for manufacturing a display panel provided in one embodiment.

[0061] Figure 15 This is a flowchart illustrating the pre-step S4 process in a method for manufacturing a display panel.

[0062] Figure 16 This is a flowchart illustrating step S41 in a method for manufacturing a display panel.

[0063] Figure 17 This is a flowchart illustrating the preceding steps of step S4 in a method for manufacturing a display panel.

[0064] Figure 18 This is a flowchart illustrating step S41 in a method for manufacturing a display panel.

[0065] Figure 19 This is a flowchart illustrating the preceding steps of step S4 in a method for manufacturing a display panel.

[0066] Figure 20 This is a flowchart illustrating step S41 in a method for manufacturing a display panel.

[0067] Explanation of reference numerals in the attached figures:

[0068] 100. Display panel; 101. Metal wiring area; 102. Non-metal wiring area;

[0069] 110. Touch substrate layer; 111. Touch functional layer; 1111. Touch trace; 1111a. First touch layer; 1112. Insulating layer; 1112a. Via; 1111b. Second touch layer; 1111c. Bridge trace; 1111d. Touch electrode; 114. Protective layer; 114a. Upper surface; 114b. Lower surface; 1141. Tank;

[0070] 200. Encapsulation layer;

[0071] 3. Light-emitting functional layer; 300. Light-emitting unit;

[0072] X: Width direction of the protective layer; Y: Thickness direction of the protective layer; Z: Length direction of the protective layer. Detailed Implementation

[0073] The features and exemplary embodiments of various aspects of this application will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of this application by illustrating examples. In the accompanying drawings and the following description, at least some well-known structures and techniques are not shown to avoid unnecessarily obscuring the application; and, for clarity, the dimensions of some structures may be exaggerated. Furthermore, the features, structures, or characteristics described below can be combined in any suitable manner in one or more embodiments.

[0074] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicating orientation or positional relationships are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0075] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of the embodiments of this application. It should also be noted in the description of this application that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0076] The inventors of this application have discovered that when the metal film layer containing the circuitry in the touch functional layer is subjected to external stress, such as when the touch panel film layer is bent, the metal film layer, because it is covered by an OC organic protective layer, will develop cracks in the corresponding metal traces if the stress is too great or the stress lasts for too long. In severe cases, this can lead to open circuits. Specifically, when the metal film layer is in a horizontal state and subjected to external stress, cracks or even open circuits are prone to occur at the points of deformation, or at folds or bends due to external stress. Therefore, mitigating the impact of stress on the metal film layer is crucial for improving product stability and lifespan.

[0077] It should be noted that, in the appendices to the embodiments of this application... Figure 1-13 In the figure, the thickness direction of the display panel 100, the thickness direction of the touch substrate layer 110, and the thickness direction of the protective layer 114 are the same, and are all represented by the symbol Y; the width direction of the protective layer 114 is represented by the symbol X, and the length direction of the protective layer 114 is represented by the symbol Z.

[0078] Please see Figure 1 , Figure 2 and Figure 3 , Figure 1 This is an enlarged view of a partial area of ​​the display panel in one embodiment. It should be noted that the touch electrodes 1111d in the touch function layer 111 may have various shapes. Figure 1 The shape shown is merely illustrative of one of the proposed shapes to illustrate the scheme of this application and should not be construed as limiting the scope of this application. Figure 2 yes Figure 1 Enlarged view of a section of the structure in part B. Figure 3 It is along Figure 2 A partial structural sectional view of the mid-section line AA.

[0079] like Figure 1 , Figure 2 and Figure 3As shown, an embodiment of the first aspect of this application provides a display panel, including: a light-emitting functional layer 3, including a plurality of spaced light-emitting units 300; an encapsulation layer 200, located on one side of the light-emitting functional layer 3 and used to encapsulate the plurality of light-emitting units 300; a touch substrate layer 110, disposed on the side of the encapsulation layer 4 opposite to the light-emitting functional layer 3; and a touch functional layer 111, disposed on the side of the touch substrate layer 110 opposite to the encapsulation layer 4, the touch functional layer 111 having a metal trace area 101 and a non-metal trace area 102 disposed adjacent to the metal trace area 101, and a touch function. Layer 111 includes at least touch traces 1111, which are located in the metal trace area 101; a protective layer 114 is disposed on the side of the touch functional layer 111 away from the touch substrate layer 110 and at least covers the touch traces 1111 in the metal trace area 101; wherein, a groove 1141 is provided on the protective layer 114, the groove 1141 extends along the thickness direction of the display panel, the orthographic projection of the groove 1141 on the touch substrate layer 110 is located within the orthographic projection of the touch functional layer 111 on the touch substrate layer 110, and there are two or more grooves 1141.

[0080] In the display panel 100 provided in this application embodiment, a protective layer 114 is provided for the touch lines 1111 that at least cover the touch functional layer 111 corresponding to the metal trace area 101. Two or more grooves 1141 are provided on the protective layer 114 corresponding to the metal trace area 101 and on the side of the touch lines 1111 facing away from the touch substrate layer 110. This makes the protective layer 114 at least partially become a mesh structure along the thickness direction Y of the display panel 100. The grooves 1141 provide deformation space for the protective layer 114 when subjected to external stress, increasing the deformation range of the protective layer 114 itself, thereby improving the stress resistance of the protective layer 114. The protective layer 114 provides a buffering effect, enhancing the stress relief of the display panel 100 itself when bent. Furthermore, by providing a groove 1141, it at least partially releases the stress borne by the touch traces 1111 when bent or subjected to external stress, increasing the deformation range of the touch traces 1111 and improving their stress resistance. This, in turn, increases the overall stress borne by the display panel 100, effectively mitigating the phenomenon of cracks or even open circuits in the touch traces 1111 of the touch functional layer 111, and improving the product stability and lifespan of the display panel 100, including the touch functional layer 111 and the protective layer 114.

[0081] In the display panel provided in this application embodiment, two or more slots 1141 can form a honeycomb-like structure in the protective layer 114. This honeycomb structure has a good effect on reducing stress. Multiple slots 1141 can disperse the stress borne by the protective layer of the display panel and release at least part of the stress of the touch lines in the touch function layer 111, thereby reducing the stress intensity borne by the touch lines 1111 in the touch function layer 111 when the display panel is subjected to external stress, so as to improve the situation where the touch lines 1111 in the touch function layer 111 crack or even break.

[0082] In the display panel provided in the embodiments of this application, such as Figure 2 and Figure 3 As shown, the touch function layer 111 is located above the light-emitting unit 300 of the light-emitting function layer 3, and the touch traces 1111 of the metal trace area 101 are arranged around the light-emitting unit 300 in the orthogonal projection of the touch substrate layer 110. The non-metal trace area 102 and the metal trace area 101 are arranged adjacent to each other.

[0083] In some embodiments, such as Figure 3-6 As shown in 9-10 and 12-13, the protective layer 114 includes an upper surface 114a and a lower surface 114b that are opposite to each other along its own thickness direction Y.

[0084] In some embodiments, such as Figure 3 , Figure 4 , Figure 10 , Figure 13 As shown, at least one groove 1141 is recessed from the upper surface 114a of the protective layer 114 toward the touch substrate layer 110. That is, the groove 1141 extends from the upper surface 114a of the protective layer 114 to the lower surface 114b of the adjacent touch substrate layer 110. By configuring the groove 1141 in this way, the display panel 100 containing the protective layer 114 can be bent inward more easily.

[0085] In some embodiments, such as Figure 5 or Figure 9 As shown, at least one groove 1141 is recessed from the lower surface 114b of the protective layer 114 toward the upper surface 114a of the protective layer 114. That is, the groove 1141 extends from the lower surface 114b to the upper surface 114a of the protective layer 114. By configuring the groove 1141 in this way, the connection area between the protective layer 114 and the touch wiring 1111 layer made of metal in the touch functional layer 111 is reduced. This allows the groove 1141 to release some of the stress borne by the touch wiring 1111, making it easier for the touch panel film layer 400 containing the protective layer 114 to bend outwards.

[0086] It is understood that in some other embodiments, at least one groove 1141 extends from the upper surface 114a and the lower surface 114b of the protective layer 114 toward the middle of the thickness direction of the protective layer 114, so that the touch panel film layer 400 containing the protective layer 114 is easy to bend outward and inward.

[0087] In some embodiments, such as Figure 6 As shown, at least one groove 1141 is located between the upper surface 114a and the lower surface 114b of the protective layer 114. Exemplarily, the groove 1141 may extend along the thickness direction Y of the protective layer 114, starting from approximately 1 / 4 to 1 / 3 of the thickness of the protective layer 114 at the upper surface 114a and ending at approximately 1 / 5 to 1 / 4 of the thickness of the protective layer 114 at the lower surface 114b, to adapt to display panels 100 requiring different inward bending performance. It is understood that the groove 1141 may also extend along the thickness direction Y of the protective layer 114, starting from approximately 1 / 5 to 1 / 4 of the thickness of the protective layer 114 at the lower surface 114b and ending at approximately 1 / 4 to 1 / 3 of the thickness of the protective layer 114 at the upper surface 114a, to adapt to display panels 100 requiring different outward bending performance. Preferably, the groove 1141 is disposed in the middle between the upper surface 114a and the lower surface 114b of the protective layer 114 to obtain a touch panel film layer 400 with a certain ability to bend inward or outward at the same time.

[0088] In one of the above embodiments, optionally, two or more slots 1141 are set at equal heights in the protective layer 114 to make the protective layer 114 have consistent optical performance as much as possible, so as not to affect the display performance of the display panel 100.

[0089] In some embodiments, at least one groove 1141 is located in the metal wiring area 101. In the display panel 100 provided in this application embodiment, the groove 1141 is located in the metal wiring area 101, and the depth of the groove 1141 is less than the thickness of the protective layer 114. This allows the protective layer 114, which is located in the metal wiring area 101 and has the groove 1141, to retain a certain amount of space to completely enclose the protective layer 114 to isolate it from external water and oxygen. This, in turn, improves or even enhances the bending performance and buffering performance of the protective layer 114 and the touch functional layer 111 while maintaining the corrosion resistance of the touch functional layer 111.

[0090] In some embodiments, such as Figure 11 and Figure 12As shown, at least one groove 1141 is located in the non-metallic trace area 102. In the display panel 100 provided in this application embodiment, by providing a groove 1141 in the non-metallic trace area 102 and giving the groove 1141 a certain depth, the overall bending performance of the composite structure layer including the touch function layer 111 and the protective layer 114 can be further improved, the stress buffering performance of the display panel 100 can be improved, the open circuit caused by cracking or breaking of the touch traces made of metal materials or their alloys in the touch function layer 111 can be effectively improved, thereby improving the stress buffering performance of the display panel 100, as well as having better stability and a longer service life.

[0091] In some embodiments, such as Figure 13 As shown, at least one groove 1141 is located in the metal trace area 101 and at least one groove 1141 is located in the non-metal trace area 102.

[0092] In some embodiments, such as Figure 2 and Figure 7-8 As shown, multiple slots 1141 are spaced apart along the extension direction of the touch traces 1111, forming a mesh-like structure in the protective layer 114. This mesh-like structure disperses stress, enhances the stress buffering effect of the protective layer 114, and increases the deformation range of the touch traces 1111 in both the protective layer 114 and the touch functional layer 111. This reduces the stress directly borne by both the protective layer 114 and the touch functional layer 111, thereby improving the overall stress resistance of both the protective layer 114 and the touch functional layer 111. It should be noted that the width d1 of the slots 1141 along the width direction X, the length along the length direction Z, and the depth H2 of the slots can all be adjusted independently or in combination as needed. The spacing d2 between the slots 1141 can be set as required.

[0093] In some embodiments, the groove 1141 extends along a predetermined path, and the predetermined path of the groove 1141 is parallel or perpendicular to the extension path of the touch trace 1111. For example, as shown... Figure 7 As shown, the groove 1141 extends along a predetermined path in the protective layer 114, and its orthographic projection onto the touch substrate layer 110 is elliptical. The touch traces 1111 of the touch functional layer 111 are in a grid pattern. Figure 7 Along the width direction X of the protective layer 114, the groove 1141 extends along the major axis of the ellipse via a predetermined path parallel to the extension path of the touch trace 1111. Figure 7 Along the length Z of the protective layer 114, the preset path of the groove 1141 extending along the major axis of the ellipse is also parallel to the extension path of the touch trace 1111. For example... Figure 8As shown, the groove 1141 extends along a preset path in the protective layer 114, and its orthographic projection on the touch substrate layer 110 is an oblong hole shape. The touch traces 1111 of the touch functional layer 111 are in a grid pattern. Figure 8 Along the length Z of the protective layer 114, the groove 1141 extends along a predetermined path parallel to the extension path of the touch trace 1111; in Figure 8 Along the width direction X of the protective layer 114, the predetermined path of the groove 1141 extending along the length direction of the waist-shaped hole is also parallel to the extension path of the touch trace 1111. For example, the orthographic projection of the groove 1141 onto the touch substrate layer 110 can also be rectangular. It is understood that in... Figure 7 and Figure 8 In the case where the orthographic projection of the groove 1141 onto the touch substrate layer is elliptical, waist-shaped, or rectangular, its extended preset path can also be perpendicular to the extension path of the touch trace 1111.

[0094] In some embodiments, the orthographic projection of the groove 1141 onto the touch substrate layer 110 is any one or a combination of two or more shapes, such as rectangle, rounded rectangle, circle, ellipse, waist-shaped hole, triangle, parallelogram. For example... Figure 2 , Figure 7 , Figure 8 As shown, the orthographic projections of the groove 1141 onto the touch substrate 110 are circular, elliptical, and oblong. It can be understood that the projection of the groove 1141 onto the touch substrate 110 can also be independently a triangle or a parallelogram, or a combination of triangle and circle, or a combination of circle and ellipse, or a combination of oblong and elliptical. Furthermore, the projection of the groove 1141 onto the touch substrate 110 can also be a combination of two or more other shapes. This allows the protective layer 114 to form different mesh-like structures to adapt to different deformation requirements.

[0095] In some embodiments, the protective layer 114 includes two or more sub-layers, each of which has a groove. In adjacent sub-layers along the thickness direction Y of the protective layer 114, the grooves 1141 are stacked or staggered along the extension path of the touch trace 1111, as shown in the reference. Figure 6In the protective layer 114, only one sublayer is provided, and the groove 1141 is located in the middle of the thickness direction of the protective layer 114. It is understood that in other embodiments, the protective layer 114 may be configured to include two or more sublayers, each sublayer having a groove 1141. The two sublayers are stacked along the thickness direction Y of the protective layer 114, and in two adjacent sublayers along the thickness direction Y, the grooves 1141 are positioned at the same vertical position along the width direction X of the protective layer 114, separated by a portion of the sublayer. Alternatively, the two sublayers are stacked along the thickness direction Y of the protective layer 114, and in two adjacent sublayers along the thickness direction Y, the grooves 1141 are spaced apart at the same vertical position along the width direction X of the protective layer 114. This allows the protective layer 114 to form a more refined honeycomb-like structure, further weakening the buffering effect of the protective layer 114 against forces.

[0096] In some embodiments, the cross-section of the groove 1141 gradually decreases along the thickness direction Y of the protective layer 114, from the side near the touch functional layer 111 to the side away from the touch substrate layer 110. In the display panel 100 provided in this application embodiment, the cross-section of the groove 1141 can form a structure that is smaller at the top and larger at the bottom, further increasing the deformation space and deformation range of the protective layer 114, reducing the connection area between the protective layer 114 and the touch functional layer 111, further releasing the stress of the touch traces 1111, improving the deformation range and stress resistance of the touch traces 1111 of the protective layer 114 and the touch functional layer 111, improving the problem of cracking or even breakage of the touch traces 1111, and improving the stability and service life of the display panel 100. It should be noted that the cross-section of the groove 1141 refers to the surface of the groove 1141 parallel to the display surface, that is, the surface of the groove 1141 perpendicular to the thickness direction.

[0097] In some embodiments, such as Figure 12 As shown, the groove 1141 is a through groove, which is located in the non-metallic wiring area 102.

[0098] In the display panel 100 provided in this application embodiment, by setting the non-metallic trace area 102 as a through-groove structure of the groove 1141, the display panel containing the protective layer 114 and the touch function layer 111 can have a larger area of ​​mesh structure, a larger deformation range and stress bearing capacity, thereby improving the deformation capacity of the touch traces 1111 of the touch function layer 111, reducing the intensity of the stress borne by the touch traces 1111, improving the situation where the touch traces 1111 crack or even break, and improving the stability and service life of the display panel.

[0099] In some embodiments, such as Figure 11As shown, corresponding to the non-metallic trace area 102, multiple slots 1141 are spaced apart to form a porous mesh structure in the protective layer 114 above the non-metallic trace area 102. The width d5 ​​of the slots 1141 and the spacing d4 between the slots 1141 in the non-metallic trace area 102 can be set according to requirements. It should be noted that the multiple slots 1141 are spaced apart corresponding to the non-metallic trace area 102, including spaced apart along the width direction X of the protective layer 114, spaced apart along the length direction Z of the protective layer 114, or simultaneously spaced apart along both the width direction X and the length direction Z of the protective layer 114.

[0100] In some embodiments, the plurality of grooves 1141 are arranged in a ring shape when projected onto the touch substrate layer 110. Exemplarily, the plurality of grooves 1141 are arranged in a rectangular ring, an elliptical ring, or a circular ring shape when projected onto the touch substrate layer 110, so that the protective layer 114 above the non-metallic trace area 102 forms a porous mesh structure.

[0101] In some embodiments, the plurality of slots 1141 are arranged in an array when projected onto the touch substrate layer 110. Exemplarily, the plurality of slots 1141 are arranged in a triangular array, a semi-circular array, a circular array, an elliptical array, a square array, or a linear array when projected onto the touch substrate layer 110. Figure 11 As shown, multiple slots 1141 correspond to non-metallic trace areas 102 and are distributed in a rectangular array in the orthographic projection of the touch substrate layer 110.

[0102] In some embodiments, two or more slots 1141 are disposed at equal heights in the protective layer 114 to form a structure that makes the protective layer 114 have consistent optical performance as much as possible, so as not to affect the display performance of the display panel 100.

[0103] In some embodiments, corresponding to the non-metallic trace area 102, the orthographic projection of the groove 1141 onto the touch substrate layer 110 is any one or a combination of two or more shapes, including rectangle, rounded rectangle, circle, ellipse, waist-shaped hole, triangle, and parallelogram. (See reference) Figure 2 , Figure 7 , Figure 8 and Figure 11As shown, corresponding to the non-metallic trace area 102, the orthographic projection of the groove 1141 onto the touch substrate layer 110 can be circular, elliptical, or oblong. It can be understood that the projection of the groove 1141 onto the touch substrate layer 110 can also be independently a triangle or a parallelogram, or a combination of triangle and circle, or a combination of circle and ellipse, or a combination of oblong and elliptical. Furthermore, the projection of the groove 1141 onto the touch substrate layer 110 can also be a combination of two or more other shapes. This allows the protective layer 114 to form different mesh-like structures to adapt to different deformation requirements.

[0104] In some embodiments, corresponding to the non-metallic trace area 102, the cross-section of the groove 1141 gradually decreases along the thickness direction Y of the protective layer 114, from the side near the touch functional layer 111 to the side away from the touch substrate layer 110. In the display panel 100 provided in this application embodiment, corresponding to the non-metallic trace area 102, the width d1 of the groove 1141 along the width direction X can form a structure that is smaller at the top and larger at the bottom, further increasing the deformation space and deformation range of the protective layer, reducing the connection area between the protective layer 114 and the touch substrate layer 110, and further releasing the deformation range and stress bearing capacity of the protective layer 114. It should be noted that the cross-section of the groove 1141 refers to the surface of the groove 1141 parallel to the display surface, that is, the surface of the groove 1141 perpendicular to the thickness direction.

[0105] In some embodiments, such as Figure 3-6 As shown, the touch trace 1111 includes only the first touch layer 1111a to obtain a display panel suitable for wearable devices.

[0106] In some embodiments, such as Figure 2 , Figure 9-10As shown in Figure 13, the touch trace 1111 includes a first touch layer 1111a, which includes a bridge trace 1111c; an insulating layer 1112 located on the side of the first touch layer 1111a opposite to the touch substrate layer 110; and a second touch layer 1111b located on the side of the insulating layer 11 opposite to the first touch layer 1111a. The second touch layer 1111b includes two or more touch electrodes 1111d, at least two of which are connected to the bridge trace vias and electrically connected to each other through the bridge trace 1111c. The touch trace 1111 forms at least one of the bridge trace 1111c and the touch electrode 1111d. In some embodiments, the insulating layer 1112 is an inorganic insulating layer, and silicon nitride may be selected as the insulating layer 1112. Both the first touch layer 1111a and the second touch layer 1111b are made of a metal material or its alloy. For example, both the first touch layer 1111a and the second touch layer 1111b can be independently composed of an alloy or composite metal layer of one or two of silver, copper, aluminum, and nickel, or doped with indium tin oxide or titanium-based conductive film. This is suitable for display panels with complex structures.

[0107] In some embodiments, such as Figure 13 As shown, the insulating layer 1112 has a via 1112a recessed into the touch substrate layer 110, and the protective layer 114 is connected to the touch substrate layer 110 through the via 1112a. This structure allows the protective layer 114 of the non-metallic trace area 102 to also have a groove 1141. While improving the overall stress buffering performance of the display panel 100 through the non-metallic trace, it can also be connected to the insulating layer 1112 of the touch functional layer 111, so that the protective layer 114 and the touch functional layer 111 are well connected.

[0108] The display panel provided in the above embodiments of this application can be applied to touch panels, foldable touch panels, mobile phones, foldable mobile phones, tablets, foldable tablets, laptops, foldable laptops, and wearable devices.

[0109] like Figure 14 As shown, an embodiment of the third aspect of this application provides a method for manufacturing a display panel. The display panel can be any of the display panels described in the first aspect embodiment above. Please refer to the accompanying documentation. Figures 1 to 13 The manufacturing methods for the display panel include:

[0110] Step S1: An encapsulation layer 200 is provided on the light-emitting functional layer 3. The light-emitting functional layer 3 includes multiple light-emitting units 300 spaced apart. The encapsulation layer 200 is used to encapsulate the multiple light-emitting units 300.

[0111] Step S2: Prepare a touch substrate layer 110 on the side of the encapsulation layer 200 opposite to the light-emitting functional layer 3;

[0112] Step S3: A touch functional layer 111 is prepared on the side of the touch substrate layer 110 away from the packaging layer 200. The touch functional layer 111 has a metal trace area 101 and a non-metal trace area 102 disposed adjacent to the metal trace area 101. The touch functional layer 111 includes at least a touch trace 1111, which is located in the metal trace area 101.

[0113] Step S4: A protective layer 114 is provided on the side of the touch function layer 111 away from the touch substrate layer 110. The protective layer covers at least the touch traces 1111 in the metal trace area 101. The protective layer 114 is provided with a groove 1141. The groove 1141 extends along the thickness direction of the display panel 100. The orthographic projection of the groove 1141 on the touch substrate layer 110 is located within the orthographic projection of the touch function layer 111 on the touch substrate layer 110. There are two or more grooves 1141.

[0114] The method for manufacturing a display panel provided in this application embodiment can prepare a protective layer 114 with grooves 1141 along the thickness direction of the display panel 100. This allows the protective layer 114 of the display panel 100 to have a good buffering effect on stress, reducing the stress on the touch traces 1111 in the touch functional layer 111, increasing the deformation range of the protective layer 114 and the touch traces 1111, and improving the stress resistance of the protective layer 114 and the touch traces 1111 in the touch functional layer 111. This improves the situation where the touch traces 1111 in the touch functional layer 111 crack or even break, thereby improving the stability and service life of the display panel.

[0115] In some embodiments, such as Figure 15 As shown, the procedure before step S4 also includes:

[0116] Step S401: Provide a protective material layer on one side of the bearing plate;

[0117] Step S402: The protective material layer is patterned to form a protective layer 114 including the groove 1141. The support plate serves as a carrier for forming the protective material layer. Patterning the protective material layer involves removing a portion of the material used to form the groove 1141 to form the protective layer 114 including the groove 1141.

[0118] In some embodiments, in step S4, a protective layer 114 with groove 1141 is disposed on the side of the touch function layer 111 away from the touch substrate layer 110 to form a protective layer 114 with groove 1141, so that the display panel 100 can be bent toward the side with groove 1141.

[0119] It is understood that patterning the protective material layer includes patterning one side or both opposite sides of the protective material layer to form a protective layer 114 with a groove 1141 on one side or a protective layer 114 with a groove 1141 on both sides.

[0120] In some embodiments, in step S4, the side of the protective layer 114 with the groove 1141 is disposed on the side of the touch function layer 111 away from the touch substrate layer 110, so as to form a protective layer 114 with the groove 1141 opening facing the touch substrate layer 110, so that the display panel can be bent outward more easily.

[0121] In some embodiments, in step S4, the side of the protective layer 114 facing away from the groove 1141 is attached to the touch functional layer 111. This forms the protective layer 114 with the opening of the groove 1141 facing away from the touch substrate layer 110, making it easier for the display panel to bend inward.

[0122] In some embodiments, in step S4, one side of the protective layer 114, which includes grooves 1141 on both sides, is attached to the touch function layer 111 to form a protective layer 114 with the opening of the grooves 1141 facing away from the touch substrate layer 110, so that the display panel can be bent inward and outward.

[0123] In some embodiments, corresponding to the metal trace area 101, the depth H2 of the groove 1141 is less than the thickness H1 of the protective layer 114. This allows the protective layer to protect the touch functional layer below it while improving the stress buffering capacity and deformation performance of the protective layer and the touch functional layer below it, effectively improving the situation where the touch traces 1111 in the touch functional layer 111 crack or even break, causing an open circuit.

[0124] In some embodiments, the method further includes the following steps prior to step S4:

[0125] Step S41: A protective material layer is formed on the side of the touch functional layer 111 opposite to the touch substrate layer 110, and the protective material layer is patterned to form a protective layer 114 including a groove 1141. This method allows the protective layer 114 including the groove 1141 to be formed directly on the touch substrate layer 110 and the touch functional layer 111.

[0126] In some embodiments, such as Figure 16 As shown, step S41 includes:

[0127] Step S411: A first sub-protective material layer is provided on the side of the touch function layer 111 opposite to the touch substrate layer 110;

[0128] Step S412: Pattern the first sub-protective material layer to form the groove 1141;

[0129] Step S413: A second sub-protective material layer is formed on the side of the first sub-protective material layer away from the touch function layer 111 to create a protective layer 114, with the opening of the groove 1141 of the protective layer 114 facing the touch function layer 111. This solution obtains the groove 1141 by patterning the first sub-protective material layer, and forms a protective layer 114 with the opening of the groove 1141 facing the touch function layer 111 by forming a display panel.

[0130] In some embodiments, corresponding to the metal trace area 101, the depth H2 of the groove 1141 is less than the thickness H1 of the protective layer 114. This allows the protective layer to protect the touch functional layer below it while improving the stress buffering capacity and deformation performance of the protective layer and the touch functional layer below it, effectively improving the situation where the touch traces 1111 in the touch functional layer 111 crack or even break, causing an open circuit.

[0131] In some embodiments, such as Figure 17 As shown, the procedure before step S4 also includes:

[0132] Step S403: A second sub-protective material layer is provided on one side of the bearing plate;

[0133] Step S404: Pattern one side of the second sub-protective material layer to form a second sub-protective material layer including the groove 1141 on one side.

[0134] In the method for manufacturing the display panel in this application embodiment, the second sub-protective material layer can be patterned first to remove part of the protective material forming the groove 1141 in the second sub-protective material layer, thereby forming a second sub-protective material layer with the groove 1141 on one side.

[0135] In some embodiments, such as Figure 18 As shown, step S41 includes:

[0136] Step S414: A first sub-protective material layer is provided on the side of the touch function layer 111 opposite to the touch substrate layer 110;

[0137] Step S415: Attach one side of the second sub-protective material layer with the groove 1141 to the first sub-material layer to form a protective layer 114. The groove 1141 is located between the upper surface 114a and the lower surface 114b of the protective layer 114. Thus, based on the first sub-protective material layer, attaching one side of the second sub-protective material layer with the groove 1141 to the first sub-material layer results in a protective layer 114 with the groove 1141 located between the upper surface 114a and the lower surface 114b of the protective layer 114.

[0138] Of course, in other embodiments, such as Figure 19 As shown, the procedure before step S4 also includes:

[0139] Step S405: Set a first sub-protective material layer on one side of the bearing plate;

[0140] Step S406: Pattern one side of the first sub-protective material layer to form a first sub-protective material layer including a groove 1141 on one side. In the display panel manufacturing method of this application embodiment, the first sub-protective material layer can be patterned first to remove part of the protective material forming the groove 1141 in the first sub-protective material layer, thereby forming a first sub-protective material layer including a groove 1141 on one side.

[0141] In some embodiments, such as Figure 20 As shown, step S41 includes:

[0142] Step S416: Attach the side of the first sub-protective material layer away from the groove 1141 to the side of the touch function layer 111 away from the touch substrate layer 110.

[0143] Step S417: A second sub-material layer is formed on the side of the first sub-protective material layer facing away from the touch function layer 111 to form a protective layer 114, with a groove 1141 located between the upper surface 114a and the lower surface 114b of the protective layer 114. Thus, with the first sub-protective material layer having a groove 1141 and the side facing away from the groove 1141 attached to the touch function layer 111, the second sub-protective material layer is attached to the side of the first sub-material layer with the groove, resulting in a protective layer 114 with the groove 1141 located between the upper surface 114a and the lower surface 114b of the protective layer 114.

[0144] It is understood that the protective layer 114 includes multiple sub-layers, and each sub-layer is provided with a groove 1141. The structure layer with the groove 1141 located between two sub-protective material layers can be formed by the above two methods. Then, by attaching the side with the groove 1141 of the other sub-protective material layer to the side of the structure layer away from the touch function layer 111, the protective layer 114 is formed.

[0145] In some embodiments, corresponding to the metal trace area 101, the depth H2 of the groove 1141 is less than the thickness H1 of the protective layer 114. This allows the protective layer to protect the touch functional layer below it while improving the stress buffering capacity and deformation performance of the protective layer and the touch functional layer below it, so as to effectively improve the situation where the touch traces 1111 in the touch functional layer 111 crack or even break, causing an open circuit.

[0146] In the display panel fabrication method of this application embodiment, this method can form a groove 1141 with its opening facing away from the protective layer of the touch functional layer 111 in the metal wiring area 101, and simultaneously form a through groove 1141 in the non-metal wiring area 102, with the opening of the groove 1141 facing away from the touch substrate layer 110. The through groove corresponds to the non-metal wiring area 102, where the protective layer 114 forms a groove 1141 extending from the upper surface 114a to the lower surface 114b. The difference lies in the masks used for the metal wiring area 101 and the non-metal wiring area 102. In the mask for forming the groove 1141 in the metal wiring area 101, the length of the columnar structure forming the groove 1141 is less than the thickness of the protective layer 114; in the mask for forming the groove 1141 in the non-metal wiring area 102, the length of the columnar structure forming the groove 1141 is equal to the thickness of the protective layer 114.

[0147] In some embodiments, step S41 includes: depositing a protective material layer on the side of the touch functional layer 111 away from the touch substrate layer 110; and patterning the protective material layer to form a protective layer 114 including a groove 1141, wherein the opening of the groove 1141 faces away from the touch functional layer 111.

[0148] In the method for manufacturing the display panel in this application embodiment, a protective material layer is provided on the side of the touch function layer 111 away from the touch substrate layer 110; the protective material layer is patterned, that is, a portion of the protective material in the protective layer 114 corresponding to the formation of the groove 1141 is removed. Using this method, a protective layer with the opening of the groove 1141 away from the touch function layer 111 can be formed in the metal wiring area 101, and a groove 1141 forming a through groove can be formed in the non-metal wiring area 102.

[0149] In some embodiments, corresponding to the metal trace area 101, the depth H2 of the trench 1141 is less than the thickness H1 of the protective layer 114; corresponding to the non-metallic trace area 102, the depth H3 of the trench 1141 is less than or equal to the thickness H1 of the protective layer 114.

[0150] The method for manufacturing the display panel in this application embodiment does not change the sequential structure and layered overall architecture of the touch substrate layer 110, the touch functional layer 111 and the protective layer 114, and therefore does not increase material costs.

[0151] An embodiment of the third aspect of this application provides a display device, including a housing and a display panel 100 provided in the embodiment of the first aspect of this application, which is mounted in the housing.

[0152] The display device provided in this application embodiment includes the above-mentioned display panel, which has better bending performance and effectively improves the situation where the metal layer in the touch panel film layer cracks or even breaks.

[0153] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A display panel, characterized in that, include: The light-emitting functional layer includes multiple spaced-apart light-emitting units; An encapsulation layer is located on one side of the light-emitting functional layer and is used to encapsulate multiple light-emitting units; A touch substrate layer is disposed on the side of the encapsulation layer opposite to the light-emitting functional layer; A touch function layer is disposed on the side of the touch substrate layer away from the encapsulation layer. The touch function layer has a metal trace area and a non-metal trace area disposed adjacent to the metal trace area. The touch function layer includes at least touch traces, and the touch traces are located in the metal trace area. A protective layer is disposed on the side of the touch functional layer opposite to the touch substrate layer and at least covers the touch traces within the metal trace area; The protective layer is provided with grooves that extend along the thickness direction of the display panel. The orthographic projection of the grooves on the touch substrate layer is located within the orthographic projection of the touch functional layer on the touch substrate layer. There are two or more grooves.

2. The display panel according to claim 1, characterized in that, The protective layer includes an upper surface and a lower surface that are opposite to each other along its own thickness direction; Preferably, at least one of the grooves is recessed from the upper surface of the protective layer toward the touch substrate layer; Preferably, at least one of the grooves is recessed from the lower surface of the protective layer toward the upper surface of the protective layer; Preferably, at least one of the grooves may extend from the upper surface and the lower surface of the protective layer toward the middle of the thickness direction of the protective layer, respectively; Preferably, at least one of the grooves is located between the upper and lower surfaces of the protective layer.

3. The display panel according to claim 2, characterized in that, At least one of the grooves is located in the metal trace area, and / or at least one of the grooves is located in the non-metal trace area.

4. The display panel according to claim 3, characterized in that, The multiple slots are spaced apart along the extension direction of the touch trace; Preferably, the groove extends along a preset path, and the preset path of the groove is parallel or perpendicular to the extension path of the touch wiring. Preferably, two or more of the grooves are arranged at equal heights in the protective layer; Preferably, the orthographic projection of the groove onto the touch substrate layer is any one of the following shapes, or a combination of two or more shapes: rectangle, rounded rectangle, circle, ellipse, waist-shaped hole, triangle, parallelogram; Preferably, the protective layer comprises two or more sub-layers, and each sub-layer is provided with the groove. Preferably, the cross-section of the groove gradually decreases along the thickness direction of the protective layer, from the side closer to the touch function layer to the side away from the touch substrate layer.

5. The display panel according to claim 1, characterized in that, The groove is a through groove, and the through groove is located in the non-metallic wiring area; Preferably, the multiple slots are spaced apart corresponding to the non-metallic wiring area; Preferably, the orthographic projections of the plurality of grooves on the touch substrate layer are arranged in a ring, or the orthographic projections of the plurality of grooves on the touch substrate layer are arranged in an array; Preferably, two or more of the grooves are arranged at equal heights in the protective layer; Preferably, the orthographic projection of the groove onto the touch substrate layer is any one of the following shapes, or a combination of two or more shapes: rectangle, rounded rectangle, circle, ellipse, waist-shaped hole, triangle, parallelogram; Preferably, the cross-section of the groove gradually decreases along the thickness direction of the protective layer, from the side closer to the touch function layer to the side away from the touch substrate layer.

6. The display panel according to claim 1, characterized in that, The touch control wiring includes: The first touch layer includes bridge routing; An insulating layer is located on the side of the first touch layer that is away from the touch substrate layer; The second touch layer is located on the side of the insulating layer opposite to the first touch layer. The second touch layer includes two or more touch electrodes. At least two of the touch electrodes are connected to the bridge trace via and are electrically connected to each other through the bridge trace. Preferably, the insulating layer has a via recessed into the touch substrate layer, and the protective layer is connected to the touch substrate layer through the via.

7. A method for manufacturing a display panel, characterized in that, include: An encapsulation layer is disposed on the light-emitting functional layer, the light-emitting functional layer comprising a plurality of spaced light-emitting units, and the encapsulation layer being used to encapsulate the plurality of light-emitting units; A touch substrate layer is prepared on the side of the encapsulation layer opposite to the light-emitting functional layer; A touch functional layer is prepared on the side of the touch substrate layer opposite to the encapsulation layer. The touch functional layer has a metal trace area and a non-metal trace area disposed adjacent to the metal trace area. The touch functional layer includes at least touch traces, and the touch traces are located in the metal trace area. A protective layer is provided on the side of the touch function layer opposite to the touch substrate layer. The protective layer covers at least the touch traces in the metal trace area. A groove is provided on the protective layer. The groove extends along the thickness direction of the display panel. The orthographic projection of the groove on the touch substrate layer is located within the orthographic projection of the touch function layer on the touch substrate layer. There are two or more grooves.

8. The method for manufacturing a display panel according to claim 7, characterized in that, Before the step of setting a protective layer on the side of the touch functional layer opposite to the touch substrate layer, the method further includes: A protective material layer is installed on one side of the load-bearing plate; The protective material layer is patterned to form the protective layer including the groove. In the step of setting a protective layer on the side of the touch functional layer away from the touch substrate layer, the protective layer having the groove is set on the side of the touch functional layer away from the touch substrate layer; Preferably, in the step of setting a protective layer on the side of the touch functional layer away from the touch substrate layer, the side of the protective layer having the groove is set on the side of the touch functional layer away from the touch substrate layer. Preferably, in the step of setting a protective layer on the side of the touch function layer away from the touch substrate layer, the side of the protective layer away from the groove is attached to the touch function layer. Preferably, the depth of the groove is less than the thickness of the protective layer.

9. The method for manufacturing a display panel according to claim 7, characterized in that, Before the step of setting the protective layer on the side of the touch functional layer opposite to the touch substrate layer, the method further includes: A protective material layer is provided on the side of the touch function layer opposite to the touch substrate layer, and the protective material layer is patterned to form the protective layer including the groove. Preferably, in the step of forming the protective layer including the groove by providing a protective material layer on the side of the touch function layer opposite to the touch substrate layer and patterning the protective material layer: A first sub-protective material layer is provided on the side of the touch function layer opposite to the touch substrate layer; The first sub-protective material layer is patterned to form a groove; A second sub-protective material layer is provided on the side of the first sub-protective material layer away from the touch function layer to form a protective layer, wherein the groove opening of the protective layer faces the touch function layer; Alternatively, the step of providing the protective layer on the side of the touch functional layer opposite to the touch substrate layer may include: A second sub-protective material layer is provided on one side of the bearing plate; One side of the second sub-protective material layer is patterned to form a second sub-protective material layer with a groove on one side; In the step of setting a protective material layer on the side of the touch functional layer opposite to the touch substrate layer, and patterning the protective material layer to form the protective layer including the groove: A first sub-protective material layer is provided on the side of the touch function layer opposite to the touch substrate layer; The second sub-protective material layer having the groove is attached to the first sub-material layer to form the protective layer, and the groove is located between the upper and lower surfaces of the protective layer. Preferably, the step of providing the protective layer on the side of the touch functional layer opposite to the touch substrate layer further includes: A first sub-protective material layer is provided on one side of the bearing plate; One side of the first sub-protective material layer is patterned to form a first sub-protective material layer with a groove on one side; In the step of setting a protective material layer on the side of the touch functional layer opposite to the touch substrate layer, and patterning the protective material layer to form the protective layer including the groove: The side of the first sub-protective material layer facing away from the groove is attached to the side of the touch function layer facing away from the touch substrate layer; A second sub-material layer is provided on the side of the first sub-protective material layer away from the touch function layer to form the protective layer, and the groove is located between the upper and lower surfaces of the protective layer; Alternatively, in the step of forming the protective material layer by patterning the protective material layer on the side of the touch function layer opposite to the touch substrate layer, the following steps are taken: A protective material layer is provided on the side of the touch function layer that is opposite to the touch substrate layer; The protective material layer is patterned to form a protective layer including a groove, the opening of the groove facing away from the touch function layer; Preferably, the depth of the groove is less than the thickness of the protective layer for the metal trace area; and the depth of the groove is less than or equal to the thickness of the protective layer for the non-metal trace area.

10. A display device, characterized in that, The display device includes a housing and a display panel as described in any one of claims 1-6, which is assembled in the housing.

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