Touch display panel and manufacturing method thereof

Abstract

The present invention provides a touch display panel and a manufacturing method thereof. The touch display panel includes a substrate; a display area, which is arranged on the substrate; an opening area, which is arranged on the substrate, and the opening area is adjacent to the display area; a plurality of touch electrodes, which are arranged on the display area; a plurality of touch electrode lines, which are electrically connected to the touch electrodes; a common voltage ring, which surrounds the display area, and the common voltage ring has a first part and a second part, which are arranged at intervals adjacent to the opening area; a connection structure, which is arranged between the first part and the second part; and a plurality of first dummy touch electrode lines, which are electrically connected to the connection structure; wherein the first part is electrically connected to the second part through the connection structure.

Description

Technical Field

[0001] The present invention relates to a touch display panel and a manufacturing method thereof, and in particular to a touch display panel and a manufacturing method thereof capable of improving display quality and avoiding bright line defects. Background Art

[0002] With the development of technology, display devices are widely used in many electronic products, such as mobile phones, tablet computers, watches, cars, etc.

[0003] For the same series of display devices, their size and resolution are the same, and the only difference is often the size of the opening (bangs), such as IPHONE12 and IPHONE13. When manufacturing the same series of display devices with different openings, it is necessary to develop different masks accordingly, which increases the cost. If some masks are shared, such as the mask for forming touch electrodes, the common voltage ring (COM-Ring) in the display panel with a larger opening after cutting and grinding may be partially disconnected, causing some virtual touch electrode lines to be unable to connect to the common voltage ring. If the other end of this part of the virtual touch electrode line is also disconnected from other lines during use or testing, then this part of the virtual touch electrode line will be in a floating state, which is easily affected by the potential of other film layers (such as pixel electrode layers), and the common voltage cannot be maintained, resulting in bright lines.

[0004] Therefore, how to provide a touch display panel and a manufacturing method thereof that can prevent the floating of dummy touch electrode lines and improve display quality is one of the problems that need to be solved. Summary of the invention

[0005] The embodiments of the present invention provide a touch display panel and a manufacturing method thereof, which can avoid floating of dummy touch electrode lines and improve display quality.

[0006] A touch display panel according to one embodiment of the present invention comprises a substrate; a display area arranged on the substrate; an opening area arranged on the substrate, and the opening area is adjacent to the display area; a plurality of touch electrodes arranged in the display area; a plurality of touch electrode lines electrically connected to the touch electrodes; a common voltage ring surrounding the display area, and the common voltage ring having a first part and a second part arranged at intervals adjacent to the opening area; a connecting structure arranged between the first part and the second part; and a plurality of first dummy touch electrode lines electrically connected to the connecting structure; wherein the first part is electrically connected to the second part via the connecting structure.

[0007] In the above touch display panel, the vertical projection of the connection structure on the substrate is in a step shape.

[0008] In the above touch display panel, the touch electrode line, the first dummy touch electrode line and the connection structure are located in the same film layer.

[0009] In the above touch display panel, the film layer is a metal layer.

[0010] The above-mentioned touch display panel, wherein the common electrode ring is located in a transparent conductive layer, and the touch display panel further includes: a first insulating layer, arranged on the substrate, and the metal layer is arranged on the first insulating layer, and the connection structure is located in the metal layer; and a second insulating layer, arranged on the first insulating layer and covering the metal layer, the transparent conductive layer is arranged on the second insulating layer, the second insulating layer has an opening, the opening exposes part of the connection structure, and the transparent conductive layer where the common voltage ring is located extends into the opening and contacts the exposed part of the connection structure.

[0011] In the above touch display panel, each of the plurality of first dummy touch electrode lines has a first end and a second end opposite to each other, the first end is electrically connected to the connection structure, and the second end is electrically connected to the common voltage ring.

[0012] The above touch display panel, wherein the touch display panel further includes a plurality of second dummy touch electrode lines, and the plurality of second dummy touch electrode lines are electrically connected to the common voltage ring.

[0013] In the above touch display panel, the opening area includes a bottom edge and two opposite sides, the second portion is disposed adjacent to the bottom edge, and the first portion and the second portion are spaced apart from each other at the two opposite sides.

[0014] In the above touch display panel, the vertical projection of the connecting structure on the substrate is located between the vertical projections of the first portion and the second portion on the substrate.

[0015] In the above touch display panel, the plurality of first dummy touch electrode lines are spaced apart from some touch electrode lines, and the some touch electrode lines are adjacent to and do not contact the connection structure.

[0016] In the above touch display panel, the connection structure and the common voltage ring are located in different film layers.

[0017] A method for manufacturing a display panel according to one embodiment of the present invention includes providing a substrate having a display area and an opening area adjacent to each other; forming a plurality of touch electrode lines and a plurality of first dummy touch electrode lines in the display area; forming a plurality of touch electrodes in the display area, wherein the plurality of touch electrodes are electrically connected to the plurality of touch electrode lines; wherein the manufacturing method further includes forming a common voltage ring on the substrate, wherein the common voltage ring surrounds the display area, and wherein the common voltage ring has a first portion and a second portion spaced apart adjacent to the opening area; and forming a connection structure, wherein the connection structure electrically connects the first portion and the second portion, and wherein the plurality of first dummy touch electrode lines are electrically connected to the connection structure.

[0018] In the above method, the vertical projection of the connecting structure on the substrate is in a step shape.

[0019] In the above method, each of the plurality of first dummy touch electrode lines has a first end and a second end opposite to each other, the first end is electrically connected to the connection structure, and the second end is electrically connected to the common voltage ring.

[0020] In the above method, the touch electrode line, the first dummy touch electrode line and the connection structure are located in the same film layer.

[0021] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention.

[0023] Figure 2 yes Figure 1 A magnified schematic diagram of region Q is shown.

[0024] Figure 3 It is a connection diagram of a connection structure according to an embodiment of the present invention.

[0025] Figure 4 It is a connection diagram of a connection structure of another embodiment of the present invention.

[0026] Wherein, the reference numerals are:

[0027] 100: Touch display panel

[0028] 101: Substrate

[0029] 102: Opening area

[0030] 103: Touch electrode

[0031] 104: Touch electrode line

[0032] 105: Common voltage loop

[0033] 1051: Part 1

[0034] 1052: Part 2

[0035] 106: Connection structure

[0036] 107: First dummy touch electrode line

[0037] 1071: First End

[0038] 1072: Second end

[0039] 108A: second dummy touch electrode line

[0040] 1081: First End

[0041] 1082: Second end

[0042] 108B: second dummy touch electrode line

[0043] 1083: First End

[0044] 1084: Second End

[0045] 109: First insulation layer

[0046] 110: Second insulation layer

[0047] 111: First sub-insulating layer

[0048] 112: Opening

[0049] 113: Second sub-insulating layer

[0050] AA: Display area

[0051] Q: Region DETAILED DESCRIPTION

[0052] The structural principle and working principle of the present invention are described in detail below in conjunction with the accompanying drawings:

[0053] Figure 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention, Figure 2 yes Figure 1 An enlarged schematic diagram of the region Q is shown. Figure 3 FIG. 1 is a connection diagram of a connection structure according to an embodiment of the present invention. Figure 1-Figure 3As shown, the touch display panel 100 of the present invention includes a substrate 101, and the substrate 101 is provided with a display area AA and an opening area 102 corresponding to the display area AA. A plurality of pixel units (not shown in the figure) and a plurality of touch electrodes 103 are respectively arranged in an array in the display area AA, and a plurality of touch electrode lines 104 are respectively electrically connected to the corresponding touch electrodes 103. On the outside of the display area AA, a common voltage ring 105 is arranged around the display area AA, and the common voltage ring 105 is used to receive a common voltage (COM), and the common voltage ring 105 has a first portion 1051 and a second portion 1052 arranged at intervals adjacent to the opening area 102, that is, the first portion 1051 and the second portion 1052 are disconnected.

[0054] In the present invention, the opening area 102 includes a bottom edge and two opposite sides, the second portion 1052 is disposed adjacent to the bottom edge of the opening area 102, and the first portion 1051 and the second portion 1052 are spaced apart at the two sides, that is, the first portion 1051 and the second portion 1052 are not connected / disconnected at the two sides. Figure 1 As shown, in this embodiment, a portion of the first portion 1051 surrounds the remaining sides of the display area AA except the side where the opening area 102 is located, and another portion of the first portion 1051 surrounds the two sides adjacent to the opening area 102. Of course, there may be other arrangements, and the present invention is not limited thereto.

[0055] In the present invention, a connection structure 106 is further provided in the touch display panel 100, and the connection structure 106 is provided between the first portion 1051 and the second portion 1052 of the common voltage ring 105, and the first portion 1051 and the second portion 1052 are electrically connected through the connection structure 106. Thus, the first portion 1051, the second portion 1052 and the connection structure 106 cooperate with each other to form a complete ring structure, which has a common voltage (COM) to shield the interference of the signal in the surrounding area to the display area AA, and strengthen the protection of the circuit in the display area AA.

[0056] In the present invention, the vertical projection of the connection structure 106 on the substrate 101 is in a stepped shape, or may be in other shapes, such as an arc or a curve, but the present invention is not limited thereto. Figure 2 As shown, the two opposite sides of the opening area 102 are in a smooth arc shape, and the connection structure 106 is extended to correspond to the shape of the side edges, that is, the overall routing trend of the connection structure 106 matches the shape of the two side edges of the opening area 102 .

[0057] Furthermore, the touch display panel 100 further includes a plurality of first dummy touch electrode lines 107, and the plurality of first dummy touch electrode lines 107 may correspond to the connection structure 106, such as Figure 1 and Figure 2 As shown, the first dummy touch electrode line 107 is electrically connected to the connection structure 106, and further electrically connected to the common voltage ring 105. Therefore, the first dummy touch electrode line 107 in a floating state at one end adjacent to the opening area 102 can also be electrically connected to the common voltage ring 105, so that the first dummy touch electrode line 107 can be maintained at the common voltage (COM), which can avoid the occurrence of bright lines in the display area here and improve the display quality; and the first dummy touch electrode line 107 can receive the common voltage (COM) to enhance the restoring force of the common voltage in the display area AA, thereby improving the quality of the touch display panel 100 (for example, improving the display effect in the normal display stage).

[0058] In the present invention, the opening area 102 is disposed adjacent to the display area AA, and the display area AA at least partially surrounds the opening area 102. The shapes and relative positions of the display area AA and the opening area 102 can be configured as required, and the present invention is not limited thereto.

[0059] Specifically, Figure 2 As shown, in the touch display panel 100 of the present invention, the vertical projection of the connection structure 106 on the substrate 101 is in a stepped shape. The vertical projection of the connection structure 106 on the substrate 101 is located between the vertical projections of the first portion 1051 and the second portion 1052 on the substrate 101, and one end of the connection structure 106 is connected to the first portion 1051, and the other end is connected to the second portion 1052.

[0060] like Figure 1 and Figure 2 As shown, the first dummy touch electrode line 107 extends along the first direction F1, and the first dummy touch electrode line 107 has a first end 1071 and a second end 1072 opposite to each other. The first end 1071 is as shown in FIG. Figure 1 and Figure 2 The end connected to the connection structure 106 (ie, the first end 1071 is an end of the touch display panel 100 adjacent to the opening area 102, see Figure 1 The second end 1072 is an end away from the connection structure 106 (that is, the second end 1072 is an end of the touch display panel 100 adjacent to the side D opposite to the side where the opening area 102 is located, see Figure 1 ).

[0061] like Figure 1As shown, the common voltage ring 105 at the side D of the touch display panel 100 that is adjacent to the side opposite to the opening area 102 is a continuous structure, so that the second end 1072 of the first dummy touch electrode line 107 is directly electrically connected to the common voltage ring 105. That is to say, in the area corresponding to the connection structure 106, the upper end of the first dummy touch electrode line 107 is indirectly connected to the common voltage ring 105 by being directly electrically connected to the connection structure 106, and the lower end thereof can be directly electrically connected to the common voltage ring 105.

[0062] In the present invention, since the first end 1071 of the first dummy touch electrode line 107 adjacent to the opening area 102 is electrically connected to the connection structure 106, the electrical connection with the common electrode ring 105 is achieved through the connection structure 106 to receive the common voltage; the second end 1072 of the first dummy touch electrode line 107 can be electrically connected to the common electrode ring 105 at a side away from the opening area 102. In this way, even if the second end 1072 of the first dummy touch electrode line 107 is disconnected from the common electrode ring 105 at a side away from the opening area 102 during use or testing, the first dummy touch electrode line 107 can still maintain electrical connection with the common electrode ring 105 through the connection structure 106 to keep its own potential at the common potential, avoid being in a floating state and being affected by the potential of other film layers, resulting in the problem of bright lines, and ensure the display quality.

[0063] Recombination Figure 1 as well as Figure 2 As shown, in the touch display panel 100, the area corresponding to the first part 1051 of the common voltage ring 105 in the second direction F2 further includes a plurality of second dummy touch electrode lines 108A, and the area corresponding to the second part 1052 of the common voltage ring 105 further includes a plurality of third dummy touch electrode lines 108B, and in the second direction F2, the first dummy touch electrode line 107 is arranged between the second dummy touch electrode line 108A and the third dummy touch electrode line 108B. The first direction F1 intersects with the second direction F2. In this embodiment, the first direction F1 is perpendicular to the second direction F2, but is not limited thereto.

[0064] like Figure 1 and Figure 2As shown, the second dummy touch electrode line 108A extends along the first direction F1, and the second dummy touch electrode line 108A has an opposite first end 1081 and a second end 1082. Different from the first dummy touch electrode line 107, the first end 1081 and the second end 1082 of the second dummy touch electrode line 108A are both directly electrically connected to the common voltage ring 105. Specifically, the first end 1081 of the second dummy touch electrode line 108A is electrically connected to a portion of the first portion 1051 adjacent to the opening area 102, and the second end 1082 of the second dummy touch electrode line 108A is electrically connected to a portion of the first portion 1051 on a side opposite to the adjacent opening area 102.

[0065] Similarly, the third dummy touch electrode line 108B extends along the first direction F1, and has an opposite first end 1083 and a second end 1084. Different from the second dummy touch electrode line 108A, the first end 1083 of the third dummy touch electrode line 108B is electrically connected to the second portion 1052, and the second end 1084 is electrically connected to the portion of the first portion 1051 opposite to the side adjacent to the opening area 102.

[0066] In the present invention, in the area corresponding to the connection structure 106, the first virtual touch electrode line 107 in the touch display panel 100 is spaced apart from part of the touch electrode lines 104, and part of the touch electrode lines 104 are electrically connected to the corresponding touch electrodes 103 and then continue to extend adjacent to the connection structure 106, but do not contact / are not connected to the connection structure 106, that is, the touch electrode line 104 and the connection structure 106 are electrically separated.

[0067] In the present invention, the touch electrode line 104, the first dummy touch electrode line 107 and the connection structure 106 are located in the same film layer, such as a metal layer, and further, can be a third metal layer (M3) or a second metal layer (M2). Therefore, the touch electrode line 104, the first dummy touch electrode line 107 and the connection structure 106 can be formed in different areas of the touch display panel 100 through the same process. Figure 2 As shown, the connection structure 106 and the plurality of first dummy touch electrode lines 107 are formed in a comb shape through the same process. The common voltage ring 105 is formed by a transparent conductive layer, for example, a first transparent conductive film layer (ITO1) or a second transparent conductive film layer (ITO2), so that the common voltage ring 105 and the connection structure 106 are located in different film layers. In order to realize the electrical connection between the connection structure 106 and the common voltage ring 105, that is, the electrical connection between the two ends of the connection structure 106 and the first part 1051 and the second part 1052 respectively, the present invention can adopt a cross-layer connection method, for example Figure 3 Connection method shown.

[0068] like Figure 3 As shown, the touch display panel 100 further includes a first insulating layer 109 disposed on the substrate 101, the connection structure 106 is disposed on the first insulating layer 109; the second insulating layer 110 is disposed on the first insulating layer 109 and covers the connection structure 106, and the common voltage ring 105 is disposed on the second insulating layer 110. In this embodiment, the connection structure 106 is a metal layer, and the common voltage ring 105 is a transparent conductive layer (ITO), but it is not limited thereto. Figure 3 As shown, the second insulating layer 110 is provided with an opening 112, which exposes part of the connection structure 106. The transparent conductive layer where the common electrode ring 105 is located extends into the opening 112 and contacts the exposed part of the connection structure 106, thereby achieving electrical connection between the common voltage ring 105 and the connection structure 106.

[0069] In another embodiment, please refer to Figure 4 , Figure 4 FIG. 1 is a connection diagram of a connection structure of another embodiment of the present invention. Figure 3 The difference is that the second insulating layer 110 is not a single insulating layer, but includes a first sub-insulating layer 111 and a second sub-insulating layer 113. Figure 4 As shown, the touch display panel 100 includes a first insulating layer 109 disposed on a substrate 101, a connection structure 106 disposed on the first insulating layer 109; a first sub-insulating layer 111 disposed on the first insulating layer 109 and covering the connection structure 106, a touch electrode 103 disposed on the first sub-insulating layer 111; a second sub-insulating layer 113 disposed on the first sub-insulating layer 111 and covering the touch electrode 103, and a common voltage ring 105 disposed on the second sub-insulating layer 113. In the present invention, the touch electrode 103 may, for example, be a first transparent conductive film layer (ITO1), and the common voltage ring 105 may, for example, be a second transparent conductive film layer (ITO2), but is not limited thereto. Figure 4 As shown, openings 112 are provided in the first sub-insulating layer 111 and the second sub-insulating layer 113, and the openings 112 expose a portion of the connection structure 106. The second transparent conductive film layer (ITO2) where the common electrode ring 105 is located extends into the opening 112 and contacts the exposed portion of the connection structure 106, thereby achieving electrical connection between the common voltage ring 105 and the connection structure 106.

[0070] The present invention also provides a method for manufacturing a display panel, Figure 1-Figure 3 As shown, the manufacturing method of the present invention comprises the following steps:

[0071] S1. Provide a substrate 101 . The substrate 101 has a display area AA and an opening area 102 that are adjacent to each other. The display area AA is at least partially arranged around the opening area 102 .

[0072] S2 , forming a plurality of touch electrode lines 104 and a plurality of first dummy touch electrode lines 107 on the substrate 101 .

[0073] S3 , forming a plurality of touch electrodes 103 arranged in an array in the display area AA, and each touch electrode 103 is electrically connected to one of the touch electrode lines 104 .

[0074] Furthermore, the manufacturing method also includes step S4, forming a common voltage ring 105 on the substrate 101, the common voltage ring 105 is arranged around the display area AA, and the common voltage ring 105 has a first part 1051 and a second part 1052 arranged at intervals adjacent to the opening area 102, and the connecting structure 106 electrically connects the first part 1051 and the second part 1052 of the common voltage ring 105; and forming the connecting structure 106, the first virtual touch electrode line 107 is electrically connected to the connecting structure 106.

[0075] In one embodiment, the connection structure 106 is disposed in the same layer as the touch electrode line 104 and the first dummy touch electrode line 107, and the connection structure 106 is formed in step S2. In one embodiment, the layer where the common electrode ring 105 is located is located above the layer where the touch electrode 103 is located, and step S4 is performed after step S3, that is, the touch electrode 103 is formed first, and then the common voltage ring 105 is formed (the pixel electrode can also be formed in the same layer). In another embodiment, the layer where the common electrode ring 105 is located is located below the layer where the touch electrode 103 is located, and step S4 is performed after step S3, that is, the common electrode ring 105 is formed first (the pixel electrode can also be formed in the same layer), and then the touch electrode 103 is formed. In another embodiment, the common electrode ring 105 is disposed in the same layer as the touch electrode 103, and step S4 is performed simultaneously with step S3.

[0076] Each first dummy touch electrode line 107 extends along the first direction F1, and each first dummy touch electrode line 107 has a first end 1071 and a second end 1072 opposite to each other. The first end 1071 of the first dummy touch electrode line 107 is electrically connected to the connection structure 106, and the second end is electrically connected to the common voltage ring 105 (specifically, the common voltage ring 105 at the side opposite to the opening area 102).

[0077] In the present invention, the touch electrode line 104, the first dummy touch electrode line 107 and the connection structure 106 are located in the same film layer, such as a metal layer, and further, can be a second metal layer (M2) or a third metal layer (M3). In one embodiment, the touch electrode 103 can be, for example, a first transparent conductive film layer (ITO1), and the common voltage ring 105 can be, for example, a second transparent conductive film layer (ITO2), but it is not limited thereto. Figure 4As shown, the connection structure 106 is formed on the first insulating layer 109 on the substrate 101, the second insulating layer 110 includes a first sub-insulating layer 111 and a second sub-insulating layer 113, the first sub-insulating layer 111 is disposed on the first insulating layer 109 and covers the connection structure 106, the touch electrode 103 is disposed on the first sub-insulating layer 111; the second sub-insulating layer 113 is disposed on the first sub-insulating layer 111 and covers the touch electrode 103, and the common voltage ring 105 is disposed on the second sub-insulating layer 113. An opening 112 is disposed in the first sub-insulating layer 111 and the second sub-insulating layer 113, the opening 112 exposes a portion of the connection structure 106, and the second transparent conductive film layer (ITO2) where the common voltage ring 105 is located extends into the opening 112 and contacts the exposed portion of the connection structure 106, so as to realize electrical connection between the common voltage ring 105 and the connection structure 106.

[0078] According to an embodiment of the present invention, by electrically connecting the common voltage rings arranged at intervals through a connecting structure, it is possible to ensure that the common voltage ring forms a complete ring structure to protect the circuit in the display area AA, and at the same time, the floating virtual touch electrode line can be electrically connected to the common voltage ring through the connecting structure, so that the virtual touch electrode line can be maintained at the common voltage (COM), thereby avoiding the occurrence of bright lines in the display area and improving the display quality.

[0079] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A touch display panel, characterized in that: include: a substrate; A display area, disposed on the substrate; an opening area, disposed on the substrate, and the opening area is adjacent to the display area; A plurality of touch electrodes are arranged in the display area; A plurality of touch electrode lines electrically connected to the touch electrodes; A common voltage ring surrounds the display area, and the common voltage ring has a first portion and a second portion disposed at intervals adjacent to the opening area; a connecting structure disposed between the first portion and the second portion; as well as A plurality of first dummy touch electrode lines electrically connected to the connection structure; in The first portion is electrically connected to the second portion via the connection structure; The touch electrode lines and the first dummy touch electrode lines are located in the same film layer and are not in contact with each other.

2. The touch display panel according to claim 1, wherein: The vertical projection of the connection structure on the substrate is in a step shape.

3. The touch display panel according to claim 1, wherein: The touch electrode line, the first dummy touch electrode line and the connection structure are located in the same film layer.

4. The touch display panel according to claim 3, wherein: The film layer is a metal layer.

5. The touch display panel according to claim 4, wherein: The common electrode ring is located on a transparent conductive layer, and the touch display panel further comprises: a first insulating layer disposed on the substrate, the metal layer disposed on the first insulating layer, and the connection structure located on the metal layer; and A second insulating layer is arranged on the first insulating layer and covers the metal layer. The transparent conductive layer is arranged on the second insulating layer. The second insulating layer has an opening, which exposes part of the connecting structure. The transparent conductive layer at the location of the common voltage ring extends into the opening and contacts the exposed part of the connecting structure.

6. The touch display panel according to claim 1, wherein: Each of the plurality of first dummy touch electrode lines has a first end and a second end opposite to each other, the first end is electrically connected to the connection structure, and the second end is electrically connected to the common voltage ring.

7. The touch display panel according to claim 1, wherein: The touch display panel further includes a plurality of second dummy touch electrode lines, and the plurality of second dummy touch electrode lines are electrically connected to the common voltage ring.

8. The touch display panel according to claim 1, wherein: The opening area includes a bottom edge and two opposite sides. The second portion is disposed adjacent to the bottom edge. The first portion and the second portion are disposed at intervals on the two opposite sides.

9. The touch display panel according to claim 1, wherein: A vertical projection of the connecting structure on the substrate is located between vertical projections of the first portion and the second portion on the substrate.

10. The touch display panel according to claim 2, wherein: The plurality of first dummy touch electrode lines are spaced apart from some of the touch electrode lines, and the some of the touch electrode lines are adjacent to and do not contact the connection structure.

11. The touch display panel according to claim 1, wherein: The connection structure and the common voltage ring are located in different film layers.

12. A method for manufacturing a display panel, characterized in that: include: Providing a substrate, wherein the substrate has a display area and an opening area that are adjacently arranged; forming a plurality of touch electrode lines and a plurality of first dummy touch electrode lines in the display area; A plurality of touch electrodes are formed in the display area, and the plurality of touch electrodes are electrically connected to the plurality of touch electrode lines; wherein, The manufacturing method further includes forming a common voltage ring on the substrate, the common voltage ring surrounds the display area, and the common voltage ring has a first portion and a second portion disposed at intervals adjacent to the opening area; and forming a connection structure, the connection structure electrically connects the first portion and the second portion, and the plurality of first dummy touch electrode lines are electrically connected to the connection structure; The touch electrode lines and the first dummy touch electrode lines are located in the same film layer and are not in contact with each other.

13. The method according to claim 12, characterized in that The vertical projection of the connection structure on the substrate is in a step shape.

14. The method according to claim 12, characterized in that Each of the plurality of first dummy touch electrode lines has a first end and a second end opposite to each other, the first end is electrically connected to the connection structure, and the second end is electrically connected to the common voltage ring.

15. The method according to claim 12, characterized in that The touch electrode line, the first dummy touch electrode line and the connection structure are located in the same film layer.

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