Display panel and display device

Abstract

The application discloses a display panel and a display device, and relates to the technical field of display, which can remove the protective glue additionally arranged in the bending area, simplify the production process, reduce the cost, thin the bending area, and improve the bending reliability. The display panel comprises a substrate layer, a driving electrode layer, a touch electrode layer, and a metal structure. The substrate layer comprises a planar area and a bending area. The driving electrode layer is arranged on the substrate layer. The touch electrode layer is arranged on the driving electrode layer. The touch electrode layer comprises a touch electrode and a touch signal line located in the planar area. The metal structure is at least partially arranged in the bending area. The metal structure is electrically insulated from the touch signal line and the driving electrode layer. An insulating cover layer is arranged on a side of the touch electrode layer away from the substrate layer. The orthographic projection of the insulating cover layer on the substrate layer covers the metal structure.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] Currently, flexible display products are being used more and more widely, especially for products with narrow bezels. Specifically, the non-display area, which is usually bonded to a driver chip or flexible circuit board, is bent to the back side of the display panel, thus reducing the bezel of the display product.

[0003] However, existing non-display bending areas are protected with adhesive. This adhesive protects the devices or circuitry in the bending area and also strengthens the film stress in the bending area. However, this protective adhesive requires additional processing steps, increasing production costs. Furthermore, the adhesive is usually applied by sealing or dispensing, resulting in a thicker layer that is not conducive to bending and affects the reliability of bending to some extent. Summary of the Invention

[0004] This application provides a display panel and display device that can remove the additional protective adhesive in the bending area, simplify the production process, reduce costs, and thin the bending area to improve bending reliability.

[0005] A first aspect of this application provides a display panel, including:

[0006] The substrate layer includes planar regions and bent regions;

[0007] A driving electrode layer is disposed on one side of the substrate layer;

[0008] A touch electrode layer is disposed on the side of the driving electrode layer away from the substrate layer, and the touch electrode layer includes touch electrodes and touch signal lines located in the planar region;

[0009] A metal structure, at least partially disposed in the bending region, is electrically insulated from the touch signal line and the driving electrode layer;

[0010] An insulating cover layer is disposed on the side of the touch electrode layer away from the substrate layer, and the orthographic projection of the insulating cover layer on the substrate layer covers the orthographic projection of the metal structure on the substrate layer.

[0011] In some embodiments, the metal structure and the touch electrode layer are disposed on the same layer and spaced apart from the touch signal line, and the orthographic projection of the metal structure on the substrate layer does not overlap with the orthographic projection of the touch signal line on the substrate layer.

[0012] In some embodiments, the planar region includes a first planar region and a second planar region, the bending region connects the first planar region and the second planar region, and the bending region is located between the first planar region and the second planar region;

[0013] The metal structure spans the first planar region, the bending region, and the second planar region;

[0014] The first planar area includes a display area and a non-display area, and the metal structure is disposed in the non-display area.

[0015] In some embodiments, the touch electrode layer includes a first touch electrode layer and a second touch electrode layer;

[0016] The metal structure is disposed in the same layer as the first touch electrode layer and / or the second touch electrode layer.

[0017] In some embodiments, the metal structure includes a plurality of first structures disposed in the same layer as the first touch electrode layer. The first structure is strip-shaped, and the length extension direction of the strip-shaped first structure is parallel to the direction from the planar region to the bending region, or the length extension direction of the strip-shaped first structure is perpendicular to the direction from the planar region to the bending region.

[0018] And / or,

[0019] The metal structure includes a plurality of second structures disposed on the same layer as the second touch electrode layer. The second structures are strip-shaped, and the length extension direction of the strip-shaped second structures is parallel to the direction from the planar region to the bending region, or the length extension direction of the strip-shaped second structures is perpendicular to the direction from the planar region to the bending region.

[0020] In some embodiments, a plurality of strip-shaped first structures are arranged at intervals; and / or,

[0021] Multiple strip-shaped second structures are arranged at intervals.

[0022] In some embodiments, the first structure includes a plurality of first openings; and / or,

[0023] The second structure includes multiple second cutouts.

[0024] In some embodiments, the first cutout is disposed in the bending region, and / or, the second cutout is disposed in the bending region; and / or,

[0025] Multiple first cutouts are arranged at intervals, and / or multiple second cutouts are arranged at intervals.

[0026] In some embodiments, the metal structure disposed in the same layer as the first touch electrode layer is mesh-like; and / or,

[0027] The metal structure disposed in the same layer as the second touch electrode layer is mesh-like.

[0028] In some embodiments, the display panel further includes:

[0029] A bridging signal line is provided on the same layer as the driving electrode layer. The touch signal line is electrically connected to the bridging signal line through a bridging via. The bridging via is located in the first planar area and the second planar area.

[0030] The bridging signal line crosses the first planar region, the bending region, and the second planar region.

[0031] In some embodiments, the orthographic projection of the bridging signal line onto the substrate overlaps with the orthographic projection of the metal structure onto the substrate.

[0032] In some embodiments, the display panel further includes:

[0033] A buffer insulating layer is disposed between the substrate layer and the metal structure;

[0034] The bending region includes a bending groove, the opening of which faces away from the metal structure, and the bending groove penetrates the substrate layer;

[0035] The difference in film thickness between the two sides of the driving electrode layer corresponding to the area where the bending groove is located is less than a set threshold.

[0036] In some embodiments, the display panel further includes:

[0037] Color filter film, including color filter insulating cover layer;

[0038] In the bending region, the color filter insulating cover layer covers the metal structure.

[0039] A second aspect of this application provides a display device, comprising:

[0040] The display panel as described in the first aspect.

[0041] The display panel provided in this application embodiment, by setting a metal structure and an insulating cover layer in the bending area, ensures that both the driving electrodes and touch signal lines are electrically insulated from the metal structure, thus avoiding signal interference and short circuits. Furthermore, the touch electrodes in the planar area have touch functionality, while the metal structure in the bending area is solely for enhanced stress protection. By setting a metal structure and an insulating cover layer in the bending area, the original protective adhesive on the surface of the bending area can be replaced, reducing the thickness of the bending area and facilitating a thinner display panel. Removing the protective adhesive reduces the additional sealing process required by the adhesive, thereby reducing production costs. Due to limitations in the protective adhesive's processing precision, sufficient space needs to be reserved between the planar area and the bending area, resulting in a wider bezel for the display panel where the bending area is located. The metal structure and insulating cover layer in the bending area, replacing the protective adhesive, can reduce the gap between the planar area and the bending area, effectively narrowing the bezel of the display panel where the bending area is located. Since the touch electrode layer and the insulating cover layer are internal film layers of the display panel, they have good stress properties. Replacing the protective adhesive can improve the bending reliability of the bending area, and the bending stress performance is high, thereby improving the yield of the display panel. Attached Figure Description

[0042] Figure 1 A schematic structural diagram of a display panel provided in an embodiment of this application;

[0043] Figure 2 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0044] Figure 3 This is a schematic diagram of the membrane structure of a bending region provided in an embodiment of this application;

[0045] Figure 4 This is a schematic diagram of the film layer structure of a display panel provided in an embodiment of this application;

[0046] Figure 5 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0047] Figure 6 This is a schematic diagram of the membrane structure of a bending region provided in an embodiment of this application;

[0048] Figure 7 A schematic partial structural diagram of a bending region provided in an embodiment of this application;

[0049] Figure 8 A schematic partial structural diagram of another bending region provided in an embodiment of this application;

[0050] Figure 9 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0051] Figure 10 A schematic structural diagram of a touch signal line and a bridging signal line provided in an embodiment of this application;

[0052] Figure 11 A schematic partial structural diagram of another bending region provided in the embodiments of this application;

[0053] Figure 12 A schematic partial structural diagram of another bending region provided in an embodiment of this application;

[0054] Figure 13 A schematic structural diagram of another display panel provided in an embodiment of this application;

[0055] Figure 14 This is a schematic structural diagram of a display device provided in an embodiment of this application. Detailed Implementation

[0056] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0057] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0058] Currently, flexible display products are being used more and more widely, especially for products with narrow bezels. Specifically, the non-display area, where the driver chip or flexible circuit board is bonded, is typically bent to the back side of the display panel, reducing the bezel size. However, existing non-display areas have protective adhesive applied to the bending region. This adhesive protects the components or circuitry in the bending area and strengthens the film stress. However, this protective adhesive requires additional processing steps, increasing production costs. Furthermore, the adhesive is usually applied through sealing or dispensing, resulting in a thicker layer that hinders bending and somewhat affects the reliability of the bending process.

[0059] In view of this, embodiments of this application provide a display panel and display device that can remove the additional protective adhesive provided in the bending area, simplify the production process, reduce costs, and thin the bending area to improve bending reliability.

[0060] A first aspect of this application provides a display panel. Figure 1 This is a schematic structural diagram of a display panel provided in an embodiment of this application. Figure 1 As shown, the display panel includes: a substrate 100, including a planar region 110 and a bent region 120; a driving electrode layer 200 disposed on one side of the substrate 100; a touch electrode layer 300 disposed on the side of the driving electrode layer 200 away from the substrate 100, the touch electrode layer 300 including a touch electrode 310 located in the planar region 110 and a touch signal line 320; a metal structure 330, at least partially disposed in the bent region 120, the metal structure 330 being electrically insulated from the touch signal line 320 and the driving electrode layer 200; and an insulating cover layer 400 disposed on the side of the touch electrode layer 300 away from the substrate 100, the orthographic projection of the insulating cover layer 400 on the substrate 100 covering the orthographic projection of the metal structure 330 on the substrate 100. The touch signal line 320 can be electrically connected to the touch electrode 310. For example, the insulating cover layer 400 can be a transparent optical adhesive, and can be an organic or inorganic material. A drive signal line can be provided on the drive electrode layer 200 within the bending region 120. The drive signal line can connect the circuit of the planar region 110 to the bonding pin of the drive chip.

[0061] It should be noted that, Figure 2 This is a schematic structural diagram of another display panel provided in an embodiment of this application. Figure 2 As shown, the planar region 110 remains flat, while the bent region 120 can bend one end of the display panel's bezel to the back side of the display panel, allowing for a narrow bezel design using a flexible substrate. It should be noted that... Figure 2 The bending of the bending area 120 is only shown in a simple diagram, and the entire film layer is not shown.

[0062] It should be noted that, Figure 3 This is a schematic diagram of the membrane structure of a bending region provided in an embodiment of this application; Figure 4 This is a schematic diagram of the film layer structure of a display panel provided in an embodiment of this application. Figure 3 As shown, the bending region 120 typically includes a first flexible layer PI1, a first buffer layer B1, a second flexible layer PI2, a second buffer layer B2, a third buffer layer B3, a first gate insulating layer GI1, a second gate insulating layer GI2, an inter-insulating layer ILD, a third flexible layer PI3, a source / drain electrode layer SD, a planarization layer PLN, a pixel defining layer PDL, a touch insulating layer TDL, and a touch protective film TOC. The source / drain electrode layer SD of the bending region 120 is used to set signal leads and other lines to electrically connect the circuitry of the planar region to the bonding pins. Figure 4 As shown, the planar region 110 is provided with a pixel limiting layer (PDL), a first electrode (TMA), a second electrode (TMB), a touch insulating layer (TLD), and a touch protective film (TOC), while the bent region 120 does not have touch electrodes. Therefore, as Figure 3 and Figure 4 The display panel shown requires a protective adhesive on the side of the bending area 120 away from the first flexible layer PI1. This protective adhesive is typically a UV-curable adhesive, requiring either a sealing or dispensing process, necessitating additional steps. Furthermore, due to precision limitations in sealing and dispensing processes, the protective adhesive is usually quite thick, which hinders the degreasing process during bending and can negatively impact reliability after bending. It should be noted that the source / drain electrode layer SD can be the same film as the driving electrode layer 200 provided in this embodiment, and the touch protection film TOC can be the same film as the insulating cover layer 400 provided in this embodiment.

[0063] To address the aforementioned issues, the display panel provided in this application, by providing a metal structure 330 and an insulating cover layer 400 in the bending region 120, ensures that the driving electrode 200 and touch signal line 320 are electrically insulated from the metal structure 330, thus avoiding signal interference and short circuits. Furthermore, the touch electrode 310 in the planar region 110 has touch functionality, while the metal structure 330 in the bending region 120 is solely for enhanced stress protection. By providing the metal structure 330 and insulating cover layer 400 in the bending region 120, the original protective adhesive on the surface of the bending region can be replaced, reducing the thickness of the bending region 120 and facilitating the thinning of the display panel. Removing the protective adhesive reduces the additional sealing process required due to its application, thereby lowering production costs. Due to limitations in the precision of the protective adhesive's manufacturing process, sufficient space needs to be reserved between the planar area 110 and the bending area 120. This results in a wider bezel for the display panel where the bending area 120 is located. The metal structure 330 and insulating cover layer 400 of the bending area 120 replace the protective adhesive, reducing the gap between the planar area 110 and the bending area 120, thus narrowing the bezel of the display panel where the bending area 120 is located. Since the touch electrode layer 300 and the insulating cover layer 400 are internal film layers of the display panel and possess good stress properties, replacing the protective adhesive improves the bending reliability of the bending area 120, resulting in higher bending stress performance and increased yield of the display panel.

[0064] In some implementations, reference Figure 1 The metal structure 330 and the touch electrode layer 300 are disposed on the same layer, which can be understood as the metal structure 330 and the touch electrode 310 being disposed on the same layer, and the metal structure 330 and the touch signal line 320 being disposed at intervals, and the orthographic projection of the metal structure 330 on the substrate layer 100 and the orthographic projection of the touch signal line 320 on the substrate layer do not overlap. The co-layering of the metal structure 330 and the touch electrode 310 does not increase the manufacturing process, does not change the production cycle, can share existing processes, and does not affect production costs.

[0065] In some implementations... Figure 5 This is a schematic structural diagram of yet another display panel provided in an embodiment of this application. (In conjunction with...) Figure 2 and Figure 5The planar region 110 includes a first planar region 111 and a second planar region 112. The bent region 120 connects the first planar region 111 and the second planar region 112 and is located between the first planar region 111 and the second planar region 112. The metal structure 330 spans the first planar region 111, the bent region 120, and the second planar region 112. The first planar region 111 includes a display area and a non-display area. The metal structure 330 is disposed in the non-display area. The display area can be used to set pixel structures, and the non-display area can be used to set driving circuits, driving signal lines, etc. This is only illustrative and is not intended to limit the specific implementation of this application.

[0066] In some embodiments, the display panel further includes a color filter film, which includes a color filter insulating cover layer; in the bending region, the color filter insulating cover layer covers a metal structure.

[0067] For example, refer to Figure 5 The color filter insulating cover layer 401 is disposed on the side of the insulating cover layer 400 away from the substrate layer 100. Alternatively, the color filter insulating cover layer 401 may also be disposed between the insulating cover layer 400 and the substrate layer 100, depending on the position of the color filter.

[0068] In some embodiments, the touch electrode layer includes a first touch electrode layer and a second touch electrode layer; the metal structure is disposed in the same layer as the first touch electrode layer and / or the second touch electrode layer.

[0069] For example, such as Figure 5 As shown, the touch electrode layer 300 includes a first touch electrode layer 301 and a second touch electrode layer 302. A touch insulating layer TLD is disposed between the first touch electrode layer 301 and the second touch electrode layer 302 in the planar region 110. A first touch electrode can be disposed on the first touch electrode layer 301 in the planar region 110, and a second touch electrode can be disposed on the second touch electrode layer 302. One of the first touch electrode and the second touch electrode can be used as a sensing electrode, and the other can be used as a signal electrode. Vias can be provided in the touch insulating layer TLD, and the first touch electrode and the second touch electrode can be electrically connected through the vias to realize the touch function.

[0070] For example, such as Figure 5 As shown, the metal structure 330 may include a first structure 331, which is disposed on the same layer as the first touch electrode layer 301. The metal structure 330 may also include a second structure 332, which may be disposed on the same layer as the second touch electrode layer 302. The metal structure shown can be either the first structure 331 or the second structure 332. Figure 5 This is merely illustrative and is not intended to limit the specific implementation of this application.

[0071] It should be noted that the bending area 120 may only have an insulating cover layer 400 or only a color film insulating cover layer 401. Figure 5 This is for illustrative purposes only. The insulating cover layer 400 and the touch protective film TOC can be the same film layer and material. The first touch electrode can be the first electrode TMA, and the second touch electrode can be the second electrode TMB.

[0072] For example, Figure 6 This is a schematic diagram of a membrane structure in a bending region provided in an embodiment of this application. Figure 6 As shown, the bending area 120 is provided with a first structure 331, a second structure 332 and an insulating covering layer 400.

[0073] For example, refer to Figure 5 and Figure 6 The pixel defining layer 500 can be used to define different pixels, that is, to separate the light-emitting materials of different light-emitting devices. The pixel defining layer 500 covers both the planar region 110 and the bent region 120. It should be noted that the pixel defining layer 500 can be the same film layer as the pixel limiting layer PDL.

[0074] In some embodiments, the first touch electrode layer 301 includes a plurality of first structures 331, the first structures 331 being strip-shaped, the orthographic projection of the first structures 331 on the substrate layer falling into the bending region 120, and the length extension direction of the strip-shaped first structures 331 being parallel to the direction of the planar region 110 pointing to the bending region 120; the first structures 331 can be fabricated simultaneously with the first touch electrode.

[0075] In some embodiments, the length extension direction of the strip-shaped first structure 331 is perpendicular to the direction from the planar region 110 to the bending region 120.

[0076] In some embodiments, the second touch electrode layer 302 includes a plurality of second structures 332, the orthographic projection of the second structures 332 on the substrate layer falling into the bending region 120, and the length extension direction of the strip-shaped second structures 332 being parallel to the direction from the planar region 110 to the bending region 120. The second structures 332 can be disposed in the same layer as the second touch electrode, and the second structures 332 can be fabricated simultaneously with the second touch electrode.

[0077] In some embodiments, the length extension direction of the strip-shaped second structure 332 is perpendicular to the direction from the planar region 110 to the bending region 120.

[0078] In some embodiments, the bending region 120 may be provided with both the first structure 331 and the second structure 332, or with only one of the first structure 331 or the second structure 332. This application does not make specific limitations.

[0079] For example, the plurality of strip-shaped first structures 331 can be arranged at equal intervals or have equal widths. The plurality of strip-shaped second structures 332 can also be arranged at equal intervals or have equal widths; this application embodiment does not specifically limit this. They can also be arranged at unequal intervals; this application embodiment does not specifically limit this.

[0080] In some embodiments, the metal structure disposed in the same layer as the first touch electrode layer is mesh-like; the metal structure disposed in the same layer as the second touch electrode layer is mesh-like. The mesh-like or strip-shaped touch electrode layer within the bending region 120 can reduce the film stress of the touch electrode layer, enhance the elastic modulus of the touch electrode layer in the bending region, facilitate bending in the bending region, and improve bending reliability.

[0081] It is understandable that the strip or mesh pattern can be interpreted as the touch electrode layer 300 in the bending area 120 having a patterned structure, which can enhance the elastic modulus of the touch electrode layer 300 in the bending area and improve bending reliability.

[0082] In some embodiments, the first structure includes multiple first hollow sections; the second structure includes multiple second hollow sections. Providing first hollow sections on the first structure can further improve the elastic modulus of the first structure and further improve its bending reliability; providing second hollow sections on the second structure can further improve the elastic modulus of the second structure and further improve its bending reliability. The first hollow sections are located in the bending region, and the second hollow sections are located in the bending region. The multiple first hollow sections are arranged at intervals, and the multiple second hollow sections are arranged at intervals.

[0083] For example, Figure 7 A schematic partial structural diagram of a bending region provided in an embodiment of this application; Figure 8 This is a schematic partial structural diagram of another bending region provided in an embodiment of this application. (See attached diagram.) Figure 7 As shown, the bending area is provided with a first structure 331 or a second structure 332; or the bending area 120 may be provided with a first structure 331 and a second structure 332, with the strips of the first structure 331 and the second structure 332 overlapping each other.

[0084] For example, such as Figure 8 As shown, the bending region 120 includes a mesh structure 333. The mesh structure 33 can be disposed on the same layer as the first touch electrode layer 301 or on the same layer as the second touch electrode layer 302. This application embodiment does not make specific limitations.

[0085] In some embodiments, the display panel further includes bridging signal lines, which are disposed on the same layer as the driving electrode layer. The touch signal lines are electrically connected to the bridging signal lines through bridging vias located in the first plane area and the second plane area. The bridging signal lines cross the first plane area, the bending area, and the second plane area. The bridging signal lines are provided to avoid metal structures or other signal lines, thereby increasing wiring space.

[0086] In some implementations, the orthographic projection of the bridging signal line onto the substrate overlaps with the orthographic projection of the metal structure onto the substrate. Since the bridging signal line and the metal structure belong to different conductive layers, their orthographic projections onto the substrate can overlap.

[0087] For example, Figure 9 This is a schematic structural diagram of another display panel provided in an embodiment of this application. Figure 9 As shown, the touch electrode layer 300 is arranged in a grid-like pattern within the planar region 110. The first structure 331 and the second structure 332 of the bending region 120 can also be patterned. The touch signal line 320 is disposed in the touch electrode layer 300, and the bridging signal line 210 is blocked by the first structure 331 and the second structure 332 of the bending region 120, that is, the orthogonal projection of the first structure 331 and / or the second structure 332 on the substrate layer covers the orthogonal projection of the bridging signal line 210 on the substrate layer. A display driver chip D-IC and a flexible circuit bonding pin FPC are disposed on the side of the bending region 120 away from the planar region 110. The touch signal line is disposed at both ends of the bending region 120. Passing through the bending region 120, the touch signal line 320 and the bridging signal line 210 are disposed on different layers to avoid the first structure 331 and the second structure 332 of the bending region 120. The touch signal line is used to connect the touch electrode and the touch driver chip. Figure 9 As shown, the length of the touch signal line extends along the plane region 110 towards the bend region 120.

[0088] For example, Figure 10 This is a schematic structural diagram of a touch signal line and a bridging signal line provided in an embodiment of this application. Figure 10 As shown, the bridging signal line 210 is disposed on the same layer as the driving electrode layer 200, and the touch signal line 320 is electrically connected to the bridging signal line 210 through the bridging via 220. The bridging via 220 is located in the first plane area 111 and the second plane area 112. The bridging signal line 210 crosses the first plane area 111, the bending area 120 and the second plane area 112.

[0089] In some embodiments, the distance between the first structure and the touch signal line is greater than 0, meaning there is a certain distance between the first structure and the touch signal line. Similarly, the distance between the second structure and the touch signal line is greater than 0, meaning there is a certain distance between the second structure and the touch signal line. Both the first and second structures are located in the bending region 120, and gaps are provided between both structures and the touch signal line to avoid altering the resistance of the touch signal line. Furthermore, during bending, space is provided for bending deformation, preventing short circuits between the first and second structures and the touch signal line after bending.

[0090] For example, Figure 11 This is a schematic partial structural diagram of another bending region provided in an embodiment of this application. For example... Figure 11 As shown, the first structure 331 is provided with a first cutout 334, the second structure 332 is provided with a second cutout 335, and a gap is provided between the first structure 331 and the second structure 332 and the touch signal line 320. Figure 11 The cutouts on the touch electrodes in the bending area shown are strip-shaped, and the length of the strip extends in a direction perpendicular to the direction of the bending area from the planar area.

[0091] For example, Figure 12 This is a schematic partial structural diagram of another bending region provided in an embodiment of this application. For example... Figure 12 As shown, the first structure 331 and the second structure 332 are strip-shaped, with the length of the strip extending from the planar region to the bending region. The first cutout 334 of the first structure 331 is circular, and the second cutout 335 of the second structure 332 is circular. Figure 12 The first structure 331 or the second structure 332 shown may have locally unequal widths; these are merely illustrative and not intended as specific limitations of this application.

[0092] In some implementations... Figure 13 This is a schematic structural diagram of another display panel provided in an embodiment of this application. Figure 13As shown, the display panel further includes: a buffer insulating layer 600 disposed between the substrate layer 100 and the metal structure 330; a buffer insulating layer 600 may also be disposed between the driving electrode 200 and the metal structure 330; the bending region includes a bending groove 700, the opening of which faces away from the touch electrode layer 300, and the bending groove 700 penetrates the substrate layer 100; the thickness difference of the film layers on both sides of the driving electrode layer 200 corresponding to the area where the bending groove 700 is located is less than a set threshold. The set threshold can be the thickness error of the film formation. In the bending region 120, the driving electrode layer 200 can be used as the central stress layer, which requires that the film layer thicknesses on both sides of the driving electrode layer 200 be the same or within a certain thickness error range. This can balance the stress and elastic modulus of the film layers on both sides of the driving electrode 200, which is beneficial for the bending of the bending region 120. In addition, a bending groove 700 is provided on one side of the substrate layer 100 in the bending region 120, which can provide deformation space for the bending of the bending region 120, avoid stress concentration in the bending region 120, and improve bending reliability.

[0093] A second aspect of this application provides a display device. Figure 14 This is a schematic structural diagram of a display device provided in an embodiment of this application. Figure 14 As shown, the display device includes a display panel 1000 as described in the first aspect.

[0094] The display device provided in this application embodiment may include displays such as smartphones, tablets, laptops, and televisions, and this application embodiment does not impose specific limitations.

[0095] The display device provided in this application embodiment, by providing a metal structure 330 and an insulating cover layer 400 in the bending region 120 of the display panel, ensures that the driving electrode 200 and the touch signal line 320 are electrically insulated from the metal structure 330, thus avoiding signal interference and short circuits. Furthermore, the touch electrode 310 in the planar region 110 has touch functionality, while the metal structure 330 in the bending region 120 is only used to enhance stress protection. By providing the metal structure 330 and the insulating cover layer 400 in the bending region 120, the original protective adhesive on the surface of the bending region can be replaced, reducing the thickness of the bending region 120 and facilitating the thinning of the display panel. Removing the protective adhesive reduces the sealing process required due to its application, thereby reducing production costs. Due to limitations in the precision of the protective adhesive's manufacturing process, sufficient space needs to be reserved between the planar area 110 and the bending area 120. This results in a wider bezel for the display panel where the bending area 120 is located. The metal structure 330 and insulating cover layer 400 of the bending area 120 replace the protective adhesive, reducing the gap between the planar area 110 and the bending area 120, thus narrowing the bezel of the display panel where the bending area 120 is located. Since the touch electrode layer 300 and the insulating cover layer 400 are internal film layers of the display panel and possess good stress properties, replacing the protective adhesive improves the bending reliability of the bending area 120, resulting in higher bending stress performance and increased yield of the display panel.

[0096] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0097] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0098] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0099] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A display panel, characterized in that, include: The substrate layer includes planar regions and bent regions; A driving electrode layer is disposed on one side of the substrate layer; A touch electrode layer is disposed on the side of the driving electrode layer away from the substrate layer, and the touch electrode layer includes touch electrodes and touch signal lines located in the planar region; A metal structure, at least partially disposed in the bending region, is electrically insulated from the touch signal line and the driving electrode layer; An insulating cover layer is disposed on the side of the touch electrode layer away from the substrate layer, and the orthographic projection of the insulating cover layer on the substrate layer covers the orthographic projection of the metal structure on the substrate layer; The metal structure and the touch electrode layer are disposed on the same layer and are spaced apart from the touch signal line, and the orthographic projection of the metal structure on the substrate layer does not overlap with the orthographic projection of the touch signal line on the substrate layer; The planar region includes a first planar region and a second planar region, the bending region connects the first planar region and the second planar region, and the bending region is located between the first planar region and the second planar region; A bridging signal line is provided on the same layer as the driving electrode layer, while the touch signal line is provided on a different layer. The metal structure is located on the side of the bridging signal line away from the substrate layer. The touch signal line and the bridging signal line are electrically connected through a bridging via. The bridging via is located in the first planar region and the second planar region. The bridging signal line crosses the first planar region, the bending region, and the second planar region.

2. The display panel according to claim 1, characterized in that, The metal structure spans the first planar region, the bending region, and the second planar region; The first planar area includes a display area and a non-display area, and the metal structure is disposed in the non-display area.

3. The display panel according to claim 1, characterized in that, The touch electrode layer includes a first touch electrode layer and a second touch electrode layer; The metal structure is disposed in the same layer as the first touch electrode layer and / or the second touch electrode layer.

4. The display panel according to claim 3, characterized in that, The metal structure includes a plurality of first structures disposed on the same layer as the first touch electrode layer. The first structure is strip-shaped, and the length extension direction of the strip-shaped first structure is parallel to the direction of the planar area pointing to the bending area, or the length extension direction of the strip-shaped first structure is perpendicular to the direction of the planar area pointing to the bending area. And / or, The metal structure includes a plurality of second structures disposed on the same layer as the second touch electrode layer. The second structures are strip-shaped, and the length extension direction of the strip-shaped second structures is parallel to the direction from the planar region to the bending region, or the length extension direction of the strip-shaped second structures is perpendicular to the direction from the planar region to the bending region.

5. The display panel according to claim 4, characterized in that, Multiple strip-shaped first structures are arranged at intervals; and / or, Multiple strip-shaped second structures are arranged at intervals.

6. The display panel according to claim 4, characterized in that, The first structure includes a plurality of first cutouts; and / or, The second structure includes multiple second cutouts.

7. The display panel according to claim 6, characterized in that, The first cutout is provided in the bending area, and / or, the second cutout is provided in the bending area; and / or, Multiple first cutouts are arranged at intervals, and / or multiple second cutouts are arranged at intervals.

8. The display panel according to claim 3, characterized in that, The metal structure disposed in the same layer as the first touch electrode layer is mesh-like; and / or, The metal structure disposed in the same layer as the second touch electrode layer is mesh-like.

9. The display panel according to claim 2, characterized in that, The orthographic projection of the bridging signal line onto the substrate overlaps with the orthographic projection of the metal structure onto the substrate.

10. The display panel according to claim 1, characterized in that, Also includes: A buffer insulating layer is disposed between the substrate layer and the metal structure; The bending region includes a bending groove, the opening of which faces away from the metal structure, and the bending groove penetrates the substrate layer; The difference in film thickness between the two sides of the driving electrode layer corresponding to the area where the bending groove is located is less than a set threshold.

11. The display panel according to claim 1, characterized in that, Also includes: Color filter film, including color filter insulating cover layer; In the bending region, the color filter insulating cover layer covers the metal structure.

12. A display device, characterized in that, include: The display panel as described in any one of claims 1-11.

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