Touch display panel and display device

Abstract

This application relates to a touch display panel and a display device. The touch display panel includes a display layer group, which includes an anode layer, a light-emitting material layer, and a cathode layer stacked together. The cathode layer includes a plurality of first cathodes, which are used to realize the display function. Among the plurality of first cathodes, a portion of the first cathodes serve as first touch electrodes, and another portion of the first cathodes serve as second touch electrodes. In the touch display panel of this application, since the first cathodes in the cathode layer are reused as both first and second touch electrodes, there is no need to set separate touch electrodes. Therefore, the thickness of the touch display panel can be reduced while still satisfying the touch function, thereby meeting the requirement for a thinner and lighter display device.

Description

Technical Field

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

[0002] AMOLED (Active Matrix Organic Light Emitting Diode) has advantages such as self-illumination, low power consumption, fast response speed, high contrast and wide viewing angle, and therefore has broad application prospects in the field of display technology.

[0003] For AMOLED display panels with touch functionality, a key challenge is how to further reduce their thickness to meet the demand for thinner and lighter display devices. Summary of the Invention

[0004] Therefore, it is necessary to provide a touch display panel and display device that reduces the thickness of the touch display panel while satisfying the touch function, so as to meet the demand for a thinner and lighter display device.

[0005] According to one aspect of this application, a touch display panel is provided. The touch display panel includes: a display layer group, the display layer group including an anode layer, a light-emitting material layer and a cathode layer stacked thereon, the cathode layer including a plurality of first cathodes, the first cathodes being used to realize a display function; wherein, among the plurality of first cathodes, a portion of the first cathodes are reused as first touch electrodes, and another portion of the first cathodes are reused as second touch electrodes.

[0006] The touch display panel in this embodiment includes a cathode layer comprising multiple first cathodes, which serve as the cathodes of OLED light-emitting elements to achieve display functionality. Simultaneously, among the multiple first cathodes in the cathode layer, some are reused as first touch electrodes, and others are reused as second touch electrodes. This constructs the touch layer group of the touch display panel to achieve touch functionality. Since the first cathodes in the cathode layer are reused as both first and second touch electrodes, there is no need to provide separate touch electrodes. Therefore, the thickness of the touch display panel can be reduced while still satisfying touch functionality, thereby meeting the requirement for a thinner and lighter display device.

[0007] In some embodiments, the first touch electrode and the second touch electrode are arranged in a row along a first direction and in a column along a second direction; the cathode layer further includes a plurality of second cathodes, which are used to realize the display function, and a second cathode is disposed between each pair of adjacent first touch electrodes and second touch electrodes. The placement of a second cathode between each pair of adjacent first touch electrodes and second touch electrodes prevents parasitic capacitance from forming between first touch electrodes and second touch electrodes in the same layer due to excessive distance, thereby improving touch sensitivity.

[0008] In some embodiments, both the first and second touch electrodes are block electrodes, and the second cathode is a strip electrode. The block shape of the first and second touch electrodes helps to increase the coupling capacitance between them, thereby improving touch sensitivity. Furthermore, the strip shape of the second cathode facilitates its distribution between the first and second touch electrodes, thus preventing the formation of parasitic capacitance.

[0009] In some embodiments, both the first and second touch electrodes are rhomboid block electrodes, and the second cathode is a linear strip electrode. This arrangement allows the first and second touch electrodes to be more compactly distributed, thereby improving the touch performance of the touch display panel.

[0010] In some embodiments, two adjacent second cathodes along the first direction are electrically connected to each other. This helps reduce the number of traces, thereby facilitating applications requiring narrow bezels on the display surface.

[0011] In some embodiments, the touch display panel has a display area and a bezel area outside the display area; the touch display panel further includes multiple first electrode traces and multiple second electrode traces disposed in the bezel area, wherein the first touch electrodes located in the same row are electrically connected to each other and connected to the same first electrode trace, and the second touch electrodes located in the same column are connected to the same corresponding second electrode trace. The second touch electrodes located in the same column are connected to the same corresponding second electrode trace; that is, each second touch electrode in a different row but the same column is connected to the same second electrode trace. This reduces the number of second electrode traces, thereby facilitating the fulfillment of the narrow bezel application requirements of the touch display panel.

[0012] In some embodiments, the bezel area includes a first wiring area, a second wiring area, a third wiring area, and a bonding area. The first wiring area and the second wiring area are located on opposite sides of the display area, the third wiring area is located on the other side of the display area, and the bonding area is located on the side of the third wiring area away from the display area. The first electrode wiring includes a first segment located in the first wiring area and a second segment located in the third wiring area, the first segment extending along the second direction. The second electrode wiring includes a third segment located in the second wiring area and a fourth segment located in the third wiring area, the third segment extending along the second direction. Because the first wiring area and the second wiring area are located on opposite sides of the display area, the first electrode wiring and the second electrode wiring are arranged separately, thereby avoiding an excessively large bezel size on one side of the display area due to an excessive number of wirings.

[0013] In some embodiments, each row of the first touch electrode has a first electrode lead extending to the first trace area and connected to a corresponding first electrode trace; each second touch electrode has a second electrode lead extending to the second trace area and connected to a second electrode trace. This configuration allows for the connection of the first electrode trace to the first touch electrode in the corresponding row, and the connection of the second electrode trace to the second touch electrode in the corresponding column of each row.

[0014] In some embodiments, the touch display panel further includes a driving circuit layer disposed on one side of the display layer group, wherein the first electrode trace and the second electrode trace are disposed on the driving circuit layer. The first electrode trace and the second electrode trace are disposed on the driving circuit layer such that they are on the same layer as the metal trace. This allows the first electrode trace, the second electrode trace, and the metal trace to be fabricated simultaneously in the same process during the manufacturing of the touch display panel, thereby simplifying the manufacturing process.

[0015] In some embodiments, the first electrode lead is connected to the first electrode trace through a first contact hole; the second electrode lead is connected to the second electrode trace through a second contact hole. The first and second electrode leads located in the cathode layer can be connected to the first and second electrode traces located in the drive circuit layer by providing contact holes. This achieves cross-layer connections between the first electrode leads and the first electrode traces, as well as between the second electrode leads and the second electrode traces.

[0016] In some embodiments, the touch layer group further includes a plurality of connecting electrodes, wherein two adjacent first touch electrodes along the first direction are connected through one of the connecting electrodes; and a portion of the plurality of first cathodes also serve as the connecting electrodes. This configuration enables electrical interconnection between the first touch electrodes in the same row.

[0017] According to another aspect of this application, a display device is provided. The display device includes the touch display panel of any of the above embodiments.

[0018] The display device in this embodiment includes a cathode layer in the display layer group of its touch display panel, comprising multiple first cathodes. These first cathodes serve as cathodes for OLED light-emitting elements, enabling display functionality. Simultaneously, among the multiple first cathodes in the cathode layer, some are reused as first touch electrodes, while others are reused as second touch electrodes. This constructs the touch layer group of the touch display panel to achieve touch functionality. Since the first cathodes in the cathode layer are reused as both first and second touch electrodes, separate touch electrodes are unnecessary. Therefore, the thickness of the touch display panel can be reduced while still satisfying touch functionality, thus meeting the requirement for a thinner and lighter display device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a touch display panel in one embodiment of this application;

[0020] Figure 2 This is a partial cross-sectional schematic diagram of the display area of ​​a touch display panel in one embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of a touch display panel in another embodiment of this application.

[0022] Figure label:

[0023] 10. Touch display panel; 110. First touch electrode; 111. First electrode lead; 120. Second touch electrode; 121. Second electrode lead; 130. Connecting electrode; 200. Display layer group; 210. Anode layer; 220. Light-emitting material layer; 230. Cathode layer; 231. First cathode; 232. Second cathode; 101. Display area; 102. First wiring area; 103. Second wiring area; 104. Third wiring area; 105. Bonding area; 300. First electrode wiring; 310. First segment; 320. Second segment; 400. Second electrode wiring; 410. Third segment; 420. Fourth segment; 500. Driving circuit layer; 600. First contact hole; 700. Second contact hole. Detailed Implementation

[0024] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] When describing positional relationships, unless otherwise specified, when an element such as a layer, film, or substrate is referred to as being "on" another element, it may be directly on the other element or there may be intermediate elements present. Furthermore, when a layer is referred to as being "below" another layer, it may be directly below it or there may be one or more light-emitting units present. It is also understood that when a layer is referred to as being "between" two layers, it may be the only layer between the two layers, or there may be one or more light-emitting units present.

[0027] When using the terms “including,” “having,” and “comprising” as described herein, another component may be added unless explicitly qualifying terms such as “only,” “consisting of,” etc. are used. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0028] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. For example, without departing from the scope of this application, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0029] It should also be understood that, in interpreting an element, although not explicitly described, the element is interpreted as including a range of error, which should be within the acceptable deviation range of a particular value as determined by a person skilled in the art. For example, "approximately," "about," or "substantially" can mean within one or more standard deviations, without limitation herein.

[0030] Furthermore, in the instruction manual, the phrase "planar distribution diagram" refers to the diagram when the target part is viewed from above, and the phrase "cross-sectional diagram" refers to the diagram when the target part is viewed from the side as a cross-section taken by vertically cutting the target part.

[0031] Furthermore, the accompanying drawings are not drawn to a 1:1 scale, and the relative dimensions of the components are shown in the drawings only as examples and not necessarily to actual scale.

[0032] AMOLED (Active Matrix Organic Light Emitting Diode) has advantages such as self-illumination, low power consumption, fast response speed, high contrast and wide viewing angle, and therefore has broad application prospects in the field of display technology.

[0033] AMOLED display panels in related technologies incorporate a touch function layer on the encapsulation layer to enable touch functionality. This touch function layer includes a first touch electrode and a second touch electrode that are insulated from each other. One of the first and second touch electrodes serves as a driving electrode, while the other serves as a sensing electrode. The presence of this touch function layer makes it difficult to further reduce the thickness of such display panels. Given the increasing demand for thinner and lighter display devices, how to further reduce the thickness of display panels to meet these requirements is a problem that needs to be solved.

[0034] To address the aforementioned issues, the embodiments of the first aspect of this application propose a touch display panel that aims to reduce the thickness of the touch display panel while satisfying the touch function, thereby meeting the demand for a thinner and lighter display device.

[0035] like Figure 1 , Figure 2 As shown, the touch display panel 10 in the first aspect embodiment of this application includes a display layer group 200. Specifically, the display layer group 200 includes an anode layer 210, a light-emitting material layer 220, and a cathode layer 230 stacked together. The cathode layer 230 includes a plurality of first cathodes 231, which are used to realize the display function. Among the plurality of first cathodes 231, a portion of the first cathodes 231 are reused as first touch electrodes 110, and another portion of the first cathodes 231 are reused as second touch electrodes 120.

[0036] The touch display panel 10 in this embodiment includes a cathode layer 230 in its display layer group 200, comprising multiple first cathodes 231. These first cathodes 231 serve as cathodes for OLED light-emitting elements, enabling display functionality. Simultaneously, some of the first cathodes 231 in the cathode layer 230 are reused as first touch electrodes 110, while others are reused as second touch electrodes 120. This constructs the touch layer group of the touch display panel 10 to achieve touch functionality. Since the first cathodes 231 in the cathode layer 230 are reused as both first touch electrodes 110 and second touch electrodes 120, separate touch electrodes are unnecessary. Therefore, the thickness of the touch display panel 10 can be reduced while still satisfying touch functionality, thus meeting the requirement for a thinner and lighter display device.

[0037] It is understood that one of the first touch electrode 110 and the second touch electrode 120 can serve as a touch driving electrode, and the other can serve as a touch sensing electrode. Furthermore, since the first cathode 231 is reused as either the first touch electrode 110 or the second touch electrode 120, the touch display panel 10 can operate in a time-division control manner, meaning the touch display panel 10 can alternate between display mode and touch mode.

[0038] In some embodiments, the first touch electrode 110 and the second touch electrode 120 are arranged in a row along a first direction and in a column along a second direction, wherein the first direction and the second direction intersect. The cathode layer 230 also includes a plurality of second cathodes 232, which are used to realize the display function, and a second cathode 232 is disposed between each pair of adjacent first touch electrodes 110 and second touch electrodes 120.

[0039] In this embodiment, the first touch electrode 110 and the second touch electrode 120 are arranged in a row along a first direction and in a column along a second direction, so that the first touch electrode 110 and the second touch electrode 120 are evenly distributed in the touch display panel 10, thereby making the effective range of the touch sensing area cover the entire display area 101 as much as possible. In addition, the cathode layer 230 also includes a plurality of second cathodes 232. The second cathodes 232 are used to realize the display function. That is, the second cathodes 232 cover at least one sub-pixel area, and the sub-pixel area is provided with a sub-pixel for display. In other words, the second cathodes 232 are only used to realize the display function and not to realize the touch function. On this basis, a second cathode 232 is provided between every two adjacent first touch electrodes 110 and second touch electrodes 120. This arrangement can prevent the generation of parasitic capacitance between the first touch electrodes 110 and second touch electrodes 120 in the same layer due to the small distance, thereby improving the touch sensitivity.

[0040] In some embodiments, both the first touch electrode 110 and the second touch electrode 120 are block electrodes, and the second cathode 232 is a strip electrode. In this embodiment, the block electrodes 110 and 120 are advantageous in increasing the coupling capacitance between them, thereby improving touch sensitivity. Furthermore, the strip electrode 232 facilitates distribution between the first and second touch electrodes 110 and 120, preventing the formation of parasitic capacitance.

[0041] In one specific example, both the first touch electrode 110 and the second touch electrode 120 are rhomboid block electrodes, and the second cathode 232 is a linear strip electrode. This arrangement allows the first touch electrode 110 and the second touch electrode 120 to be more compactly distributed, thereby improving the touch performance of the touch display panel 10. In other examples, the first touch electrode 110 and the second touch electrode 120 can also be block electrodes of other shapes, such as triangles, pentagons, or irregular shapes.

[0042] In some embodiments, two adjacent second cathodes 232 along a first direction are electrically connected to each other. For example, they can be connected by leads. This arrangement ensures that all second cathodes 232 in the same row are connected to each other. Based on this, only one trace 2321 is needed for multiple second cathodes 232 in each row, which helps to reduce the number of traces 2321. Since traces 2321 are usually located in the bezel area of ​​the touch display panel 10, reducing the number of traces 2321 helps to reduce the size of the bezel area of ​​the touch display panel 10, thereby helping to meet the application requirements of narrow bezels in touch display panels.

[0043] It is understandable that, based on the premise that multiple second cathodes 232 in each row are connected to a single trace 2321, since all the second cathodes 232 are at the same cathode voltage when the touch display panel 10 is in display mode, second cathodes 232 in different rows can also share the same trace 2321 (please refer to...). Figure 3 This allows for a further reduction in the number of traces 2321, resulting in a narrower bezel.

[0044] In some embodiments, the touch display panel 10 has a display area 101 and a border area located outside the display area 101. The touch display panel 10 also includes a plurality of first electrode traces 300 and a plurality of second electrode traces 400 disposed in the border area. First touch electrodes 110 located in the same row are electrically connected to each other and connected to the same first electrode trace 300, and second touch electrodes 120 located in the same column are connected to the same corresponding second electrode trace 400. It is understood that the border area includes a bonding area 105, and the first electrode traces 300 and the second electrode traces 400 are used to connect the first touch electrodes 110 and the second touch electrodes 120 to the bonding area 105. Thus, through the bonding area 105 and the flexible circuit board, the first touch electrodes 110 and the second touch electrodes 120 are connected to the touch driving circuit and the touch sensing circuit on the flexible circuit board. Furthermore, in this embodiment, the second touch electrodes 120 located in the same column are connected to the same corresponding second electrode trace 400. That is, each second touch electrode 120 in a different row but the same column is connected to the same second electrode trace 400. This reduces the number of second electrode traces 400, which is beneficial to meeting the application requirements of the narrow bezel of the touch display panel 10.

[0045] In some embodiments, the border area includes a first wiring area 102, a second wiring area 103, a third wiring area 104, and a bonding area 105. The first wiring area 102 and the second wiring area 103 are disposed on opposite sides of the display area 101, the third wiring area 104 is disposed on the other side of the display area 101, and the bonding area 105 is disposed on the side of the third wiring area 104 away from the display area 101. The first electrode wiring 300 includes a first segment 310 located in the first wiring area 102 and a second segment 320 located in the third wiring area 104, the first segment 310 extending along a second direction. The second electrode wiring 400 includes a third segment 410 located in the second wiring area 103 and a fourth segment 420 located in the third wiring area 104, the third segment 410 extending along a second direction.

[0046] In this embodiment, the first electrode trace 300 passes through the first trace area 102 and the third trace area 104, thereby connecting to the bonding area 105 located on one side of the third trace area 104. The second electrode trace 400 passes through the second trace area 103 and the third trace area 104, thereby connecting to the bonding area 105 located on one side of the third trace area 104. Since the first trace area 102 and the second trace area 103 are located on opposite sides of the display area 101, the first electrode trace 300 and the second electrode trace 400 are arranged separately, thereby avoiding an excessively large bezel size on one side of the display area 101 due to an excessive number of traces. In addition, the first segment 310 of the first electrode trace 300 extends along the second direction, thereby facilitating the connection of the end of the first segment 310 to the first touch electrode 110 of the corresponding row; the third segment 410 of the second electrode trace 400 extends along the second direction, thereby facilitating the connection of the third segment 410 to the corresponding second touch electrode 120 in each row.

[0047] In some embodiments, each row of first touch electrodes 110 has a first electrode lead 111 extending to a first trace area 102 and connected to a corresponding first electrode trace 300. Each second touch electrode 120 has a second electrode lead 121 extending to a second trace area 103 and connected to a corresponding second electrode trace 400. This configuration allows for the connection of the first electrode trace 300 to the first touch electrodes 110 in the corresponding row, and the connection of the second electrode trace 400 to the second touch electrodes 120 in the corresponding column of each row.

[0048] The first electrode lead 111 can be disposed in the same layer as the first touch electrode 110, and the second electrode lead 121 can be disposed in the same layer as the second touch electrode 120. In this case, since both the first touch electrode 110 and the second touch electrode 120 are first cathodes 231, the first electrode lead 111 and the second electrode lead 121 are disposed in the same layer as the first cathode 231.

[0049] In some embodiments, the touch display panel 10 further includes a driving circuit layer 500 disposed on one side of the display layer group 200, with the first electrode trace 300 and the second electrode trace 400 disposed on the driving circuit layer 500. It is understood that the driving circuit layer 500 includes not only driving circuitry for controlling the OLED light-emitting element, but also driving traces for connecting the driving circuitry to the bonding region 105. In this embodiment, the first electrode trace 300 and the second electrode trace 400 are disposed on the driving circuit layer 500, thus the driving circuit layer 500 contains both driving traces and the first electrode trace 300 and the second electrode trace 400, which helps to reduce the thickness of the bonding region 105. Furthermore, during the fabrication of the touch display panel 10, it is advantageous to fabricate the first electrode trace 300 and / or the second electrode trace 400 along with a portion of the driving traces in the same process, thereby simplifying the manufacturing process.

[0050] In some embodiments, the first electrode lead 111 is connected to the first electrode trace 300 through the first contact hole 600; the second electrode lead 121 is connected to the second electrode trace 400 through the second contact hole 700. That is, by providing contact holes, the first electrode lead 111 and the second electrode lead 121 located in the cathode layer 230 can be connected to the first electrode trace 300 and the second electrode trace 400 located in the drive circuit layer 500. This achieves cross-layer connections between the first electrode lead 111 and the first electrode trace 300, and between the second electrode lead 121 and the second electrode trace 400.

[0051] In some embodiments, the touch layer group further includes a plurality of connecting electrodes 130, wherein two adjacent first touch electrodes 110 along a first direction are connected through a connecting electrode 130. A portion of the plurality of first cathodes 231 also serve as connecting electrodes 130. This configuration enables electrical connection between the first touch electrodes 110 in the same row. It is understood that the connecting electrode 130 can also be used to implement a display function; that is, the connecting electrode 130 can cover at least one sub-pixel area, and this sub-pixel area is provided with a sub-pixel for display. Further, the connecting electrode 130 can be a strip electrode extending along the first direction, thereby enabling electrical connection between adjacent first touch electrodes 110.

[0052] In some embodiments, the first touch electrode 110 and the second touch electrode 120 are both block electrodes, with each first touch electrode 110 covering multiple sub-pixel regions and each second touch electrode 120 covering multiple sub-pixel regions. The connecting electrode 130 is a strip electrode and covers multiple first sub-pixel regions. In this embodiment, among the multiple first cathodes 231, a portion of the first cathodes 231 are reused as the first touch electrode 110, a portion of the first cathodes 231 are reused as the second touch electrode 120, and a portion of the first cathodes 231 are reused as the connecting electrode 130. The first touch electrode 110, the second touch electrode 120, and the connecting electrode 130 all cover multiple sub-pixel regions, thereby enabling the first touch electrode 110, the second touch electrode 120, and the connecting electrode 130 to not only effectively implement touch functionality but also serve as part of the display layer group 200, thus effectively fulfilling the display function.

[0053] The second aspect of this application provides a display device including the touch display panel 10 described in any of the embodiments of the first aspect. The display device can be, for example, any product or component with display functionality, such as a monitor, television, digital camera, mobile phone, tablet computer, or navigator.

[0054] In the display device of this application embodiment, the cathode layer 230 of the display layer group 200 of the touch display panel 10 includes a plurality of first cathodes 231. The first cathodes 231 serve as cathodes of OLED light-emitting elements to realize the display function. Simultaneously, among the plurality of first cathodes 231 in the cathode layer 230, some first cathodes 231 are reused as first touch electrodes 110, and others are reused as second touch electrodes 120. Thus, the touch layer group of the touch display panel 10 is constructed to realize the touch function. Since the first cathodes 231 in the cathode layer 230 are reused as first touch electrodes 110 and second touch electrodes 120, there is no need to set separate touch electrodes. Therefore, the thickness of the touch display panel 10 can be reduced while still satisfying the touch function, thereby meeting the requirement for a thinner and lighter display device.

[0055] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A touch display panel, characterized in that, The application relates to a touch display panel. The display layer group comprises an anode layer, a light-emitting material layer and a cathode layer arranged in a stack, and the cathode layer comprises a plurality of first cathodes for realizing a display function. Some of the first cathodes are multiplexed as first touch electrodes, and some of the first cathodes are multiplexed as second touch electrodes. The first touch electrodes and the second touch electrodes are arranged in rows along a first direction and arranged in columns along a second direction. The cathode layer further comprises a plurality of second cathodes for realizing a display function, and each of the second cathodes is arranged between two adjacent first touch electrodes and second touch electrodes. 2.The touch display panel of claim 1, wherein, The extension directions of at least some of the second cathodes are intersected. 3.The touch display panel of claim 1, wherein, The first touch electrodes and the second touch electrodes are block electrodes, and the second cathodes are strip electrodes. 4.The touch display panel of claim 2, wherein, The first touch electrodes and the second touch electrodes are rhombic block electrodes, and the second cathodes are straight strip electrodes. 5.The touch display panel according to any one of claims 1 to 4, characterized in that, Two adjacent second cathodes along the first direction are electrically connected to each other. The touch display panel has a display area and a frame area outside the display area. 6.The touch display panel of claim 5, wherein, The touch display panel further comprises a plurality of first electrode traces and a plurality of second electrode traces arranged in the frame area. The first touch electrodes in the same row are electrically connected to each other and connected to the same first electrode trace. The frame area comprises a first trace area, a second trace area, a third trace area and a binding area. 7.The touch display panel of claim 6, wherein, The first electrode traces comprise a first section in the first trace area and a second section in the third trace area. The second electrode traces comprise a third section in the second trace area and a fourth section in the third trace area. 8.The touch display panel of claim 7, wherein, Each row of first touch electrodes has a first electrode lead extending to the first trace area and connected to the corresponding first electrode trace. 9.The touch display panel of claim 8, wherein, Each second touch electrode has a second electrode lead extending to the second trace area and connected to the second electrode trace. The touch display panel further comprises a driving circuit layer arranged on one side of the display layer group. The first electrode lead is connected to the first electrode trace through a first contact hole. The second electrode lead is connected to the second electrode trace through a second contact hole. 10.The touch display panel of claim 5, wherein, The touch display panel further comprises a plurality of connection electrodes, two first touch electrodes adjacent in the first direction are connected by one connection electrode. Among the plurality of first cathodes, a part of the first cathodes serve as the connection electrodes.

11. A display device comprising: The touch display panel as claimed in any one of claims 1 to 10.

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