Touch display panel and display device

Abstract

The invention provides a touch display panel and a display device. The touch display panel comprises a plurality of pixel units, wherein each pixel unit comprises at least two sub-pixels arranged along a first direction; the data lines extend in the second direction in the display area, are arranged between two columns of adjacent pixel units in the first direction and comprise data branch lines extending in the first direction, and the data lines are electrically connected with the sub-pixels in the corresponding pixel units through the data branch lines; each touch line group comprises at least two touch lines extending in the second direction in the display area, the touch lines are arranged between two columns of adjacent sub-pixels in the pixel units in the first direction, and the touch lines and the data branch lines are overlapped; in the first direction, two adjacent touch lines belong to different touch line groups. The touch display panel can effectively reduce the interference of stray capacitance on touch signals, improve the problem of non-uniform display and improve the uniformity of a display picture.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a touch display panel and a display device. BACKGROUND

[0002] At present, the Incell technology (integrated touch technology) has been widely used in the field of LCD (liquid crystal display), and its advantages of low cost and thinness make it an effective solution to improve the added value of display.

[0003] In order to reduce the cost, some Incell technology adopts dual gate structure, which reduces the amount of source IC (data line integrated circuit) by reducing the number of source (data) channels.

[0004] The dual gate structure usually adopts zigzag pixel arrangement and column inversion driving mode to improve display quality. However, in this design scheme, the touch line (TP line) and the data line (source line) in the display area will overlap, and the parasitic capacitance generated thereby will cause the touch signal or the common voltage signal to be coupled, affecting the liquid crystal pressure, causing display abnormalities (Mura phenomenon).

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information which does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0006] Based on this, the embodiments of the present application provide a touch display panel and a display device, which can effectively reduce the interference of parasitic capacitance on touch signal, improve the display unevenness problem, and improve the uniformity of display picture.

[0007] According to some embodiments, the present application provides a touch display panel, comprising:

[0008] a plurality of pixel units arranged in a first direction and a second direction in a display area of the touch display panel, each of the pixel units comprising at least two sub-pixels arranged in the first direction;

[0009] a plurality of data lines extending in the second direction in the display area and arranged between two adjacent pixel units in the first direction, the data lines comprising data branch lines extending in the first direction, and the data lines being electrically connected to the sub-pixels in the corresponding pixel units through the data branch lines;

[0010] a plurality of touch line groups, each of the touch line groups comprising at least two touch lines extending along the second direction within the display area, the touch lines being arranged between two columns of adjacent sub-pixels in the pixel units in the first direction, the touch lines overlapping the data branch lines;

[0011] In the first direction, two adjacent touch lines belong to different touch line groups.

[0012] In some embodiments, the sub-pixels are double-gate pixel structures, and each of the pixel units comprises two sub-pixels arranged along the first direction;

[0013] The touch display panel further comprises a plurality of gate lines, each of the gate lines extending along the first direction within the display area, and each row of the pixel units being electrically connected to two adjacent gate lines.

[0014] In some embodiments, in the first direction, each of the pixel units is electrically connected to one adjacent data line.

[0015] In the second direction, two adjacent pixel units in one column of the pixel units are electrically connected to different data lines.

[0016] In some embodiments, the touch display panel comprises a plurality of touch line sets arranged repeatedly along the first direction, each of the touch line sets comprising a first touch line group and a second touch line group arranged along the first direction;

[0017] Each of the first touch line groups comprises two first touch lines.

[0018] Each of the second touch line groups comprises two second touch lines.

[0019] The first touch lines and the second touch lines are arranged in sequence repeatedly along the first direction.

[0020] In some embodiments, the touch display panel further comprises a non-display area outside the display area, each of the first touch line groups and the second touch line groups corresponds to a pad, and the pads are arranged in the non-display area.

[0021] The first touch line group comprises a first connection line arranged in the non-display area and used for connecting the two first touch lines and the corresponding pad, and the second touch line group comprises a second connection line arranged in the non-display area and used for connecting the two second touch lines and the corresponding pad.

[0022] The first touch lines and the second touch lines are arranged in a first metal layer of the touch display panel.

[0023] At least one portion of the first connection line and / or at least one portion of the second connection line is disposed in a second metal layer different from the first metal layer, so that the first touch line group and the second touch line group are insulated at the overlapping position.

[0024] In some embodiments, the first connection line comprises a first connection line segment extending along the first direction and a second connection line segment extending along the second direction;

[0025] The second connection line comprises a third connection line segment extending along the first direction and a fourth connection line segment extending along the second direction;

[0026] The first connection line segment is parallel to the third connection line segment, and the first connection line segment and the third connection line segment are disposed in the second metal layer;

[0027] At least one portion of the second connection line is disposed in a second metal layer different from the first metal layer, so that the first touch line group and the second touch line group are insulated at the overlapping position.

[0028] In some embodiments, the touch display panel comprises a plurality of touch line sets arranged repeatedly along the first direction, each of the touch line sets comprising a first touch line group, a second touch line group and a third touch line group arranged along the first direction;

[0029] Each of the first touch line groups comprises two first touch lines;

[0030] Each of the second touch line groups comprises two second touch lines;

[0031] Each of the third touch line groups comprises two third touch lines;

[0032] The first touch lines, the second touch lines and the third touch lines are arranged in sequence repeatedly along the first direction.

[0033] In some embodiments, the touch display panel further comprises a non-display area outside the display area, each of the first touch line groups and the second touch line groups corresponds to a pad, and the pad is disposed in the non-display area;

[0034] The first touch line group comprises a first connection line disposed in the non-display area, for connecting the two first touch lines and the corresponding pad;

[0035] The second touch line group comprises a second connection line disposed in the non-display area, for connecting the two second touch lines and the corresponding pad;

[0036] The third touch control line group includes a third connection line arranged in the non-display area and used for connecting two third touch control lines and a corresponding pad;

[0037] The first touch control line, the second touch control line and the third touch control line are arranged in a first metal layer of the touch display panel.

[0038] The first connection line is arranged in the first metal layer.

[0039] At least a part of the second connection line and the third connection line is arranged in a second metal layer different from the first metal layer, so that the first touch control line group, the second touch control line group and the third touch control line group are insulatively arranged at an overlapping position.

[0040] In some embodiments, the first connection line includes a first connection line segment extending along the first direction and a second connection line segment extending along the second direction.

[0041] The second connection line includes a third connection line segment extending along the first direction and a fourth connection line segment extending along the second direction.

[0042] The third connection line includes a fifth connection line segment extending along the first direction and a sixth connection line segment extending along the second direction.

[0043] The first connection line segment, the third connection line segment and the fifth connection line segment are parallel to each other.

[0044] The fourth connection line segment and the second connection line segment are respectively arranged in different metal layers at the overlapping position.

[0045] The fourth connection line segment and the sixth connection line segment are respectively arranged in different metal layers at the overlapping position.

[0046] In some embodiments, the touch display panel further includes a non-display area outside the display area, each of the first touch control line group, the second touch control line group and the third touch control line group corresponds to a pad, and the pad is arranged in the non-display area.

[0047] The first touch control line group includes a first connection line arranged in the non-display area and used for connecting two first touch control lines and a corresponding pad.

[0048] The second touch control line group includes a second connection line arranged in the non-display area and used for connecting two second touch control lines and a corresponding pad.

[0049] The third touch control line group includes a third connection line arranged in the non-display area and used for connecting two third touch control lines and a corresponding pad.

[0050] The first touch control line, the second touch control line and the third touch control line are arranged in the first metal layer of the touch display panel.

[0051] The first connection line is arranged in the first metal layer.

[0052] At least a part of the second connection line is arranged in a second metal layer different from the first metal layer, and at least a part of the third connection line is arranged in a third metal layer different from the first metal layer and the second metal layer; or

[0053] At least a part of the second connection line is arranged in the third metal layer, and at least a part of the third connection line is arranged in the second metal layer, so that the first touch control line group, the second touch control line group and the third touch control line group are insulatively arranged at the overlapping position.

[0054] In some embodiments, the touch display panel comprises a plurality of touch control line sets arranged repeatedly along the first direction, each of the touch control line sets comprising a first touch control line group, a second touch control line group, a third touch control line group and a fourth touch control line group arranged along the first direction.

[0055] Each of the first touch control line groups comprises two first touch control lines.

[0056] Each of the second touch control line groups comprises two second touch control lines.

[0057] Each of the third touch control line groups comprises two third touch control lines.

[0058] Each of the fourth touch control line groups comprises two fourth touch control lines.

[0059] The first touch control line, the second touch control line, the third touch control line and the fourth touch control line are arranged repeatedly along the first direction.

[0060] In some embodiments, the touch display panel further comprises a non-display area outside the display area, each of the first touch control line group, the second touch control line group, the third touch control line group and the fourth touch control line group corresponds to a pad, and the pad is arranged in the non-display area.

[0061] The first touch control line group comprises a first connection line arranged in the non-display area, for connecting the two first touch control lines and the corresponding pad.

[0062] The second touch control line group comprises a second connection line arranged in the non-display area, for connecting the two second touch control lines and the corresponding pad.

[0063] The third touch line group includes a third connecting line arranged in the non-display area and used for connecting two third touch lines and a corresponding pad;

[0064] The fourth touch line group includes a fourth connecting line arranged in the non-display area and used for connecting two fourth touch lines and a corresponding pad;

[0065] The first touch line, the second touch line, the third touch line and the fourth touch line are arranged in a first metal layer of the touch display panel;

[0066] At least a part of the first connecting line, the second connecting line, the third connecting line and the fourth connecting line is arranged in a second metal layer different from the first metal layer, so that the first touch line group, the second touch line group, the third touch line group and the fourth touch line group are insulatively arranged at overlapping positions.

[0067] In some embodiments, the first connecting line includes a first connecting line segment extending along the first direction and a second connecting line segment extending along the second direction;

[0068] The second connecting line includes a third connecting line segment extending along the first direction and a fourth connecting line segment extending along the second direction;

[0069] The third connecting line includes a fifth connecting line segment extending along the first direction and a sixth connecting line segment extending along the second direction;

[0070] The fourth connecting line includes a seventh connecting line segment extending along the first direction and an eighth connecting line segment extending along the second direction;

[0071] The first connecting line segment, the third connecting line segment, the fifth connecting line segment and the seventh connecting line segment are parallel to each other;

[0072] The first connecting line segment, the third connecting line segment, the fifth connecting line segment and the seventh connecting line segment are in the second metal layer.

[0073] In some embodiments, the touch display panel further includes a non-display area outside the display area, each of the first touch line group, the second touch line group, the third touch line group and the fourth touch line group corresponds to a pad, and the pad is arranged in the non-display area;

[0074] The first touch line group includes a first connecting line arranged in the non-display area and used for connecting two first touch lines and a corresponding pad;

[0075] The second touch control line group includes a second connection line arranged in the non-display area and used for connecting two second touch control lines and corresponding pads;

[0076] The third touch control line group includes a third connection line arranged in the non-display area and used for connecting two third touch control lines and corresponding pads;

[0077] The fourth touch control line group includes a fourth connection line arranged in the non-display area and used for connecting two fourth touch control lines and corresponding pads;

[0078] The first touch control line, the second touch control line, the third touch control line and the fourth touch control line are arranged in a first metal layer of the touch display panel;

[0079] At least one of the first connection line, the second connection line, the third connection line and the fourth connection line is arranged in a second metal layer different from the first metal layer, and the others are arranged in a third metal layer different from the first metal layer and the second metal layer, so that the first touch control line group, the second touch control line group, the third touch control line group and the fourth touch control line group are insulatively arranged at the overlapping positions.

[0080] In some embodiments, the first connection line includes a first connection line segment extending along the first direction and a second connection line segment extending along the second direction;

[0081] The second connection line includes a third connection line segment extending along the first direction and a fourth connection line segment extending along the second direction;

[0082] The third connection line includes a fifth connection line segment extending along the first direction and a sixth connection line segment extending along the second direction;

[0083] The fourth connection line includes a seventh connection line segment extending along the first direction and an eighth connection line segment extending along the second direction;

[0084] The first connection line segment, the third connection line segment, the fifth connection line segment and the seventh connection line segment are parallel to each other;

[0085] At least one of the first connection line segment, the third connection line segment, the fifth connection line segment and the seventh connection line segment is in the second metal layer, and the others are in the third metal layer.

[0086] According to some embodiments, another aspect of the present application further provides a display device including the touch display panel provided in the foregoing embodiments.

[0087] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as claimed.

[0088] The embodiments of the present application can have / at least have the following advantages:

[0089] In the embodiments of the present application, the touch control lines are arranged between two adjacent sub-pixels in the pixel unit in the first direction, and the touch control lines and the data lines extend out data branches in the first direction and overlap. The embodiments of the present application attribute the two adjacent touch control lines in the first direction to different touch control line groups, optimize the arrangement mode of the touch control lines and the data lines, make the touch control lines realize mutual cancellation of the influence of the coupled signals at different positions caused by the parasitic capacitance, thereby effectively reduce the interference of the parasitic capacitance on the touch control signal, improve the display non-uniformity problem (such as vertical stripe phenomenon) caused by the interference of the data line signal on the touch control line, significantly improve the uniformity of the display picture, and further improve the display performance of the touch control display panel.

[0090] Additional advantages, objects, and features of the application will be set forth in part by the description that follows, and in part will become apparent to those skilled in the art upon examination of same, or can be learned from practice of the application. The objectives and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0091] Other features, objects, and advantages of the application will become apparent from the detailed description of non-limiting embodiments that follows, when read in connection with the accompanying drawings.

[0092] Figure 1 is a structural schematic diagram of a pixel unit, a data line, and a touch control line group in a touch control display panel provided by some embodiments of the present application;

[0093] Figure 2 is a schematic diagram of the voltage variation amount caused by the data line when the row display by different gate lines in the touch control display panel according to some embodiments of the present application;

[0094] Figure 3 is a structural schematic diagram of a touch control display panel containing a first touch control line group, a second touch control line group, and a bonding pad in some embodiments of the present application;

[0095] Figure 4 is a structural schematic diagram of a touch control display panel containing a first touch control line group and a second touch control line group in some embodiments of the present application;

[0096] Figure 5 is a structural schematic diagram of a touch control display panel containing a first touch control line group and a second touch control line group in some other embodiments of the present application;

[0097] Figure 6 is a structural schematic diagram of a touch display panel comprising a first touch line group, a second touch line group and a third touch line group in some embodiments of the present application;

[0098] Figure 7 is a structural schematic diagram of a touch display panel comprising a first touch line group, a second touch line group and a third touch line group in some embodiments of the present application;

[0099] Figure 8 is a structural schematic diagram of a touch display panel comprising a first touch line group, a second touch line group, a third touch line group and a fourth touch line group in some embodiments of the present application;

[0100] Figure 9 is a structural schematic diagram of a touch display panel comprising a first touch line group, a second touch line group, a third touch line group and a fourth touch line group in some embodiments of the present application;

[0101] Figure 10 is a structural schematic diagram of a sub-pixel in a touch display panel in some embodiments of the present application;

[0102] Figure 11 is a structural schematic diagram of a display device provided by some embodiments of the present application.

[0103] Legend of reference signs:

[0104] 1, display device; 10, display panel;

[0105] P, sub-pixel; S', data branch line;

[0106] TP, touch line; TP1, first touch line group; TP2, second touch line group; TP3, third touch line group; TP4, fourth touch line group;

[0107] 111, first touch line; 112, first connection line; 121, second touch line; 122, second connection line; 131, third touch line; 132, third connection line; 141, fourth touch line; 142, fourth connection line;

[0108] 112a, first connection line segment; 112b, second connection line segment; 122a, third connection line segment; 122b, fourth connection line segment; 132a, fifth connection line segment; 132b, sixth connection line segment; 142a, seventh connection line segment; 142b, eighth connection line segment;

[0109] 200, pad. DETAILED DESCRIPTION

[0110] For the purposes of understanding the present application, a more complete description of the application will be made with reference to the accompanying drawings. The drawings presented herein are of preferred embodiments of the application. However, the application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0111] 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 in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0112] It is to be understood that the terminology "connected" as used in the following description refers to a direct connection between circuitry, modules, units, etc. or an indirect connection through one or more other circuitry, modules, units, etc. between the connected circuitry, modules, units, etc. Also, in the following description, when a layer, region, or element is "connected" to another layer, region, or element, it can be interpreted that the layer, region, or element is not only directly connected to the other layer, region, or element, but also connected through another constituent element disposed therebetween. For example, when a layer, region, element, etc. is described as being connected or electrically connected, the layer, region, element, etc. can be directly connected or electrically connected, or can be connected or electrically connected through another layer, region, element, etc. disposed therebetween. In addition, the terms "vertical", "horizontal", "left", "right", and similar expressions used herein are for illustrative purposes only.

[0113] Hereinafter, although terms such as "first", "second", etc. can be used to describe various components, the components are not necessarily limited to the above terms. The above terms are used only to distinguish one component from another component. It will also be understood that an expression used in the singular encompasses an expression in the plural, unless the context clearly indicates otherwise.

[0114] When an expression such as "at least one of... " is used following a list of elements (elements), it is to be understood that the expression is intended to include only one of the elements in the list, and not a combination of the elements in the list. Also, the terms "include / including", "have / having" or the like specify the presence of the stated feature, integer, component, part, or combination thereof, but do not exclude the presence or addition of one or more other features, integers, components, parts, or combinations thereof. Meanwhile, the term "or / and" used in the specification includes any and all combinations of the associated listed items.

[0115] In order to reduce the cost, some Incell technology adopts a dual gate structure to reduce the amount of source IC (data line integrated circuit) by reducing the number of source (data) channels. The dual gate structure usually adopts zigzag pixel arrangement and column inversion driving mode to improve display quality. In this design scheme, the touch line (TP line) and the data line (source line) in the display area will overlap, and the parasitic capacitance generated thereby will cause the touch signal to be coupled, affect the liquid crystal pressure, and cause display abnormalities (Mura phenomenon).

[0116] In view of the above deficiencies, the present application provides a touch display panel and a display device, which can effectively reduce the interference of parasitic capacitance on the touch signal, improve the display unevenness problem, and improve the uniformity of the display picture. The detailed content will be described in the subsequent embodiments.

[0117] In one aspect, the present application provides a touch display panel. The touch display panel involved in the present application can include a liquid crystal display panel (LCD), an organic light emitting diode display panel (OLED), a quantum dot light emitting diode display panel (QL ED), a mini light emitting diode display (Mini LED), a micro light emitting diode display (Micro LED), and the like, but is not limited thereto. The embodiments of the present application take the LCD display panel as an example for illustration.

[0118] Specifically, please refer to Figure 1 The touch display panel provided by the present application includes a plurality of pixel units, a plurality of data lines S, and a plurality of touch line groups.

[0119] The plurality of pixel units are arranged in a first direction and a second direction in the display area of the touch display panel. In the embodiments of the present application, the first direction intersects the second direction. The first direction is, for example, the X direction as shown in Figure 1 , and the second direction is, for example, the Y direction as shown in Figure 1 , and the first direction X and the second direction Y are taken as examples for subsequent description.

[0120] Each pixel unit includes at least two sub-pixels arranged in the first direction X. As shown in Figure 1As shown, Figure 1 The dotted box P in FIG. 1 shows one of the sub-pixels in the touch display panel.

[0121] The data line S extends along the second direction Y within the display area and is arranged between two adjacent columns of pixel units in the first direction X. The data line S includes a data branch line S' extending in the first direction X, and the data line S is electrically connected to the sub-pixel P in the corresponding pixel unit through the data branch line S'.

[0122] It should be noted that, see Figure 1 It can be seen that not all sub-pixels P need to be electrically connected to the data line S through the data branch line S'. For example, some sub-pixels P can be directly electrically connected to the data line S, which is not specifically limited in this application.

[0123] Each touch line group includes at least two touch lines TP extending along the second direction Y in the display area. The touch lines TP are arranged between two adjacent sub-pixels P in the pixel unit in the first direction X, and the touch lines TP overlap with the data branch lines S'.

[0124] In the first direction X, two adjacent touch lines TP belong to different touch line groups.

[0125] In the touch display panel provided by the present application, a touch line TP is arranged between two adjacent columns of sub-pixels P in a pixel unit in a first direction X, and the touch line TP overlaps with a data branch line S' extending from a data line S in the first direction X. The touch display panel provided by the present application optimizes the arrangement of the touch lines TP and the data lines S by assigning two adjacent touch lines TP in the first direction X to different touch line TP groups. This allows the influence of coupled signals on the touch lines TP at different locations where parasitic capacitance is generated to be offset, thereby effectively reducing the interference of parasitic capacitance on the touch signal, improving the display unevenness problem (such as vertical streaks) caused by the interference of data line signals on the touch lines TP, significantly improving the uniformity of the displayed image, and thereby improving the display performance of the touch display panel.

[0126] by Figure 1 The first touch line group TP1 shown in FIG is taken as an example for further explanation. The first touch line group TP1 is affected by the parasitic capacitance of the adjacent data lines S1, S2, S4 and S5. Figure 2 It shows the voltage impact caused by the data line when the touch display panel displays a pure green picture.

[0127] Please combine Figure 1 and Figure 2It is understood that the touch display panel further includes gate lines L1, L3, L5, and L7 extending in the display area along the first direction X. When the gate line L1 controls the pixel units in its row to display, due to parasitic capacitance between the data lines S1, S2, S4, and S5 and the first touch line group TP1, the voltage of the first touch line group TP1 is affected by the data lines S1, S2, S4, and S5.

[0128] For ease of description, Vp*x is defined below as the unit voltage change in a single overlapping area, where Vp is the absolute value of the unit voltage change in a single overlapping area, and x represents the polarity change of the parasitic capacitance in a single overlapping area, which is determined by the voltage polarity of the data line S and can be +1, -1 or 0.

[0129] Taking the LCD panel as an example, combined with Figure 1 ,by Figure 2 As shown, when the gate lines are turned on sequentially, the pixel units in the corresponding row are controlled to display a pure color (such as green), and the data signal is provided in the form of column flipping for further explanation. It can be understood that in a pure green image, the corresponding green sub-pixel receives a larger data voltage (such as ±10V), causing the liquid crystal molecules to deflect, while the other sub-pixels receive a smaller data voltage (such as 0V), causing the liquid crystal molecules to not deflect, so that the overall display is green.

[0130] Combine Figure 1 、 Figure 2 At a certain moment, such as the moment when gate line L1 is turned on, the polarity given by data line S1 is positive, and data line S2 has no signal change when gate line L1 is displayed. Similarly, the polarities of data signals S3 to S6 are positive, negative, no signal change, and negative respectively.

[0131] There are two overlapping areas a1 and a2 between the data line S1 and the first touch line group TP1. The data line S1 is positively coupled in both overlapping areas. Therefore, the voltage change of the first touch line group TP1 caused by the data line S1 is 2Vp×(+1), that is, +2Vp.

[0132] There are two overlapping areas b1 and b2 between the data line S2 and the first touch line group TP1. However, since the data line S2 has no signal change when the gate line L1 is displayed, the voltage change of the first touch line group TP1 caused by the data line S2 is 2Vp×(0), that is, no voltage change occurs overall.

[0133] There are two overlapping areas c1 and c2 between the data line S4 and the first touch line group TP1. The data line S4 is negatively coupled in both overlapping areas. Therefore, the voltage change of the first touch line group TP1 caused by the data line S4 is 2Vp×(−1), ie, −2Vp.

[0134] There are two overlapping areas d1 and d2 between the data line S5 and the first touch line group TP1. However, since the data line S5 has no signal change when the gate line L1 is displayed, the voltage change of the first touch line group TP1 caused by the data line S5 is 2Vp×(0), that is, no voltage change occurs overall.

[0135] It can be seen that in the touch display panel provided in the embodiment of the present application, the voltage changes of the first touch line group TP1 caused by the data lines S1, S2, S4 and S5 can offset each other. Therefore, when the gate line L1 controls the pixel units in the row to display, the voltage of the first touch line group TP1 as a whole will not be affected.

[0136] Still taking the LCD panel as an example, combined with Figure 1 ,by Figure 2 As shown, at the moment when gate line L3 is turned on, the polarity given by data line S1 is positive, the polarity given by data line S2 is negative, and so on. The polarities of data signals S3 to S6 are no signal change, negative, positive, and no signal change respectively.

[0137] Similar to the moment when gate line L1 is turned on, the voltage change of the first touch line group TP1 caused by data line S1 is 2Vp×(+1), that is, +2Vp; the voltage change of the first touch line group TP1 caused by data line S2 is 2Vp×(-1), that is, -2Vp; the voltage change of the first touch line group TP1 caused by data line S4 is 2Vp×(-1), that is, -2Vp; and the voltage change of the first touch line group TP1 caused by data line S5 is 2Vp×(+1), that is, +2Vp.

[0138] By analogy, when the subsequent gate lines control the pixel units in the corresponding row to perform display, the parasitic capacitance effects received by the first touch line group TP1 can be offset at different positions.

[0139] As an example, the sub-pixel P may be a dual-gate pixel structure, and each pixel unit includes two sub-pixels P arranged along the first direction X.

[0140] In this example, the touch display panel may include a plurality of gate lines, wherein each gate line extends along a first direction X within the display area, and each row of pixel units is electrically connected to two adjacent gate lines.

[0141] In some embodiments, in the first direction X, each pixel unit is electrically connected to an adjacent data line S; in the second direction Y, two adjacent pixel units in a column of pixel units are electrically connected to different data lines S.

[0142] Optionally, the touch display panel can further include a non-display area outside the display area.

[0143] In some embodiments, the touch display panel can include a plurality of touch line sets arranged repeatedly along a first direction X.

[0144] For example, the touch display panel can further include a plurality of touch electrodes (not shown in the drawings), each touch line set being connected to a touch electrode.

[0145] The touch display panel will be described in more detail below Figures 3 to 5 For example, each touch line set includes a first touch line set TP1 and a second touch line set TP2 arranged along the first direction X.

[0146] For example, each first touch line set TP1 includes two first touch lines 111, and each second touch line set TP2 includes two second touch lines 121; the first touch lines 111 and the second touch lines 121 are arranged repeatedly in order along the first direction X.

[0147] The data lines S extend along a second direction Y in the display area and are arranged between two adjacent touch line sets in the first direction X.

[0148] In some embodiments, each first touch line set TP1 and second touch line set TP2 can correspond to a pad 200 respectively. For example, the pad 200 can be arranged in the non-display area.

[0149] For example, the pad 200 can be connected to a touch driving chip, the touch driving chip outputs a corresponding touch signal to the pad 200 according to a touch operation or a display requirement; after the pad 200 obtains the touch signal, the pad 200 transmits the touch signal to the corresponding touch line set.

[0150] In some embodiments, the first touch line set TP1 can include a first connecting line 112 arranged in the non-display area, for connecting the two first touch lines 111 and the corresponding pad 200; the second touch line set TP2 can include a second connecting line 122 arranged in the non-display area, for connecting the two second touch lines 121 and the corresponding pad 200. The first connecting line 112 and the second connecting line 122 respectively connect the corresponding touch line and the pad 200, ensuring the independence of the signal transmission path, avoiding signal interference between the touch line sets, and thus improving the stability and reliability of the signal transmission process in the touch display panel.

[0151] In the above embodiments, the first touch control lines 111 and the second touch control lines 121 can be arranged in the first metal layer of the touch display panel; at least a part of the first connection lines 112 or / and at least a part of the second connection lines 122 are arranged in the second metal layer different from the first metal layer, so that the first touch control line group TP1 and the second touch control line group TP2 are arranged in insulation at the overlapping position. For example Figure 4 As shown, the first connection lines 112 are arranged in the first metal layer, and part of the second connection lines 122 are arranged in the second metal layer.

[0152] By arranging at least a part of the first connection lines 112 or / and at least a part of the second connection lines 122 in the second metal layer different from the first metal layer, that is, at least one of the first connection lines 112 and the second connection lines 122 has a part arranged in the second metal layer, the insulation arrangement of the first touch control line group TP1 and the second touch control line group TP2 at the overlapping position is realized. By such design, not only the signal interference and short circuit failure between the first touch control line group TP1 and the second touch control line group TP2 due to line crossing can be avoided, the accuracy of signal transmission and the stability of touch response are improved, but also since the first connection lines 112 and the second connection lines 122 are arranged in the non-display area, the display effect can be further avoided, and the display quality of the touch display panel is improved.

[0153] It is worth noting that the arrangement of the bonding pads 200 is not related to the touch control line groups connected thereto. The bonding pads 200 can be located in the first metal layer or the second metal layer, and the present application does not make specific limitation thereto.

[0154] As an example, the bonding pads 200 corresponding to different touch control line groups can be arranged in the same metal layer, for example Figure 4 As shown in the touch display panel, the bonding pads 200 are arranged in the first metal layer. Arranging the bonding pads 200 in the same metal layer can reduce the requirement of alignment and insulation structure stacking between the metal layers in the manufacturing process, which is beneficial to simplify the production process, reduce the manufacturing complexity and cost. Arranging the bonding pads 200 in the same layer can also save the space in the vertical direction, thereby improving the design compactness of the touch display panel and leaving more space for other functional areas.

[0155] In some embodiments, the first connection lines 112 include first connection line segments 112a extending along the first direction X and second connection line segments 112b extending along the second direction Y; the second connection lines 122 include third connection line segments 122a extending along the first direction X and fourth connection line segments 122b extending along the second direction Y; and the first connection line segments 112a are parallel to the third connection line segments 122a.

[0156] In the above embodiments, as shown in Figure 5As shown, the first connection line segment 112a and the third connection line segment 122a can be disposed on the second metal layer, and at least a portion of the second connection line 122 is disposed on the second metal layer different from the first metal layer, so that the first touch control line group and the second touch control line group are insulated at the overlapping position. For example Figure 5 As shown, the third connection line segment 122a of the second connection line 122 is partially disposed on the second metal layer.

[0157] By disposing the first connection line segment 112a and the third connection line segment 122a on the second metal layer different from the first metal layer, and disposing at least a portion of the second connection line 122 on the second metal layer, the insulation of the first touch control line group and the second touch control line group at the overlapping position is achieved. In this way, signal interference and short circuit failure between the first touch control line group and the second touch control line group due to line crossing can be avoided, and the accuracy of signal transmission and the stability of touch response are improved.

[0158] In addition, by disposing the first connection line segment 112a and the third connection line segment 122a on the second metal layer, greater flexibility for the design of the pad 200 can be provided while ensuring the insulation between the first touch control line group and the second touch control line group, for example, facilitating the disposition of each pad 200 on the same metal layer, thereby further optimizing the circuit layout.

[0159] It is worth noting that in the present embodiment, the data line S is disposed on a metal layer different from the first metal layer and the second metal layer, i.e., the data line S is not disposed on the same metal layer as the touch control lines (including the first touch control line 111 and the second touch control line 121) and the connection lines (including the first connection line 112 and the second connection line 122). However, in some embodiments, the data line S can be disposed on the same metal layer as the touch control lines, and the specific disposition manner will be further described below.

[0160] The following will be described in more detail with reference to Figure 1 , Figure 6 and Figure 7 , taking each touch control line set including a first touch control line group TP1, a second touch control line group TP2 and a third touch control line group TP3 arranged along a first direction X as an example.

[0161] As an example, each first touch control line group TP1 includes two first touch control lines 111, each second touch control line group TP2 includes two second touch control lines 121, and each third touch control line group TP3 includes two third touch control lines 131; the first touch control lines 111, the second touch control lines 121 and the third touch control lines 131 are sequentially and repeatedly arranged along the first direction X.

[0162] Similar to the foregoing embodiments, each of the first touch control line group TP1, the second touch control line group TP2 and the third touch control line group TP3 can correspond to one pad 200 respectively. The first touch control line group TP1 can include a first connecting line 112 arranged in the non-display area and used to connect two first touch control lines 111 and the corresponding pad 200; the second touch control line group TP2 can include a second connecting line 122 arranged in the non-display area and used to connect two second touch control lines 121 and the corresponding pad 200; and the third touch control line group TP3 can include a third connecting line 132 arranged in the non-display area and used to connect two third touch control lines 131 and the corresponding pad 200, so as to ensure the independence of the signal transmission path, avoid signal interference between the touch control line groups, and improve the stability and reliability of the signal transmission process in the touch display panel.

[0163] Please refer to Figure 1 and Figure 6 for further description taken by way of example with the first touch control line 111, the second touch control line 121 and the third touch control line 131 arranged in the first metal layer of the touch display panel.

[0164] In some embodiments, as shown in Figure 1 , the first connecting line 112 is arranged in the first metal layer, and at least a part of the second connecting line 122 and the third connecting line 132 are arranged in a second metal layer different from the first metal layer, so that the first touch control line group TP1, the second touch control line group TP2 and the third touch control line group TP3 are arranged in insulation at the overlapping position.

[0165] In other embodiments, as shown in Figure 6 , at least a part of the second connecting line 122 is arranged in a second metal layer different from the first metal layer, and at least a part of the third connecting line 132 is arranged in a third metal layer different from the first metal layer and the second metal layer; or, at least a part of the second connecting line 122 can be arranged in the third metal layer, and at least a part of the third connecting line 132 can be arranged in the second metal layer, so that the first touch control line group TP1, the second touch control line group TP2 and the third touch control line group TP3 are arranged in insulation at the overlapping position. Both of them can be selected according to actual needs, and are both allowed.

[0166] In some embodiments, the first connecting line 112 includes a first connecting line segment 112a extending along the first direction X and a second connecting line segment 112b extending along the second direction Y; the second connecting line 122 includes a third connecting line segment 122a extending along the first direction X and a fourth connecting line segment 122b extending along the second direction Y; and the third connecting line 132 includes a fifth connecting line segment 132a extending along the first direction X and a sixth connecting line segment 132b extending along the second direction Y; wherein the first connecting line segment 112a, the third connecting line segment 122a and the fifth connecting line segment 132a are parallel to each other two by two.

[0167] In the above embodiments, the fourth connection line segment 122b and the second connection line segment 112b are respectively in different metal layers at the overlapping position, and the fourth connection line segment 122b and the sixth connection line segment 132b are respectively in different metal layers at the overlapping position, so that the first touch line group TP1, the second touch line group TP2 and the third touch line group TP3 are insulated at the overlapping position.

[0168] Please refer to Figure 7 It is understood that, in some embodiments, the data line S and the touch lines (e.g., the first touch line 111, the second touch line 121 and the third touch line 131) are arranged in the same layer. The first connection line 112 is arranged in the first metal layer, at least a part of the second connection line 122 is arranged in the second metal layer, and at least a part of the third connection line 132 is arranged in the third metal layer. Thus, the first touch line group TP1, the second touch line group TP2 and the third touch line group TP3 can still be insulated at the overlapping position. By arranging the data line S and the touch lines in the same layer, the manufacturing process is effectively simplified, the manufacturing process of the array substrate is avoided to be increased, and good signal transmission performance is maintained.

[0169] The following will be described in more detail with Figure 8 and Figure 9 as an example that each touch line set includes the first touch line group TP1, the second touch line group TP2, the third touch line group TP3 and the fourth touch line group TP4 arranged along the first direction X.

[0170] As an example, each first touch line group TP1 includes two first touch lines 111, each second touch line group TP2 includes two second touch lines 121, each third touch line group TP3 includes two third touch lines 131, and each fourth touch line group TP4 includes two fourth touch lines 141; the first touch line 111, the second touch line 121, the third touch line 131 and the fourth touch line 141 are sequentially and repeatedly arranged along the first direction X.

[0171] Similar to the previous embodiment, each of the first touch line group TP1, the second touch line group TP2, the third touch line group TP3, and the fourth touch line group TP4 may correspond to a pad 200. The first touch line group TP1 includes a first connecting line 112 disposed in the non-display area, for connecting two first touch lines 111 with corresponding pads 200. The second touch line group TP2 includes a second connecting line 122 disposed in the non-display area, for connecting two second touch lines 121 with corresponding pads 200. The third touch line group TP3 includes a third connecting line 132 disposed in the non-display area, for connecting two third touch lines 131 with corresponding pads 200. The fourth touch line group TP4 includes a fourth connecting line disposed in the non-display area, for connecting two fourth touch lines 141 with corresponding pads 200. This ensures the independence of signal transmission paths, avoids signal interference between touch line groups, and improves the stability and reliability of signal transmission in the touch display panel.

[0172] The following is further described by taking as an example that the first touch line 111 , the second touch line 121 , the third touch line 131 and the fourth touch line 141 are all disposed on the first metal layer of the touch display panel.

[0173] In some embodiments, as Figure 8 As shown, at least a portion of the first connection line 112, the second connection line 122, the third connection line 132, and the fourth connection line 142 are disposed in a second metal layer different from the first metal layer, so that the first touch line group TP1, the second touch line group TP2, the third touch line group TP3, and the fourth touch line group TP4 are insulated at the overlapping portions.

[0174] As an example, the first connecting line 112 includes a first connecting line segment 112a extending along the first direction X and a second connecting line segment 112b extending along the second direction Y; the second connecting line 122 includes a third connecting line segment 122a extending along the first direction X and a fourth connecting line segment 122b extending along the second direction Y; the third connecting line 132 includes a fifth connecting line segment 132a extending along the first direction X and a sixth connecting line segment 132b extending along the second direction Y; the fourth connecting line 142 includes a seventh connecting line segment 142a extending along the first direction X and an eighth connecting line segment 142b extending along the second direction; wherein, the first connecting line segment 112a, the third connecting line segment 122a, the fifth connecting line segment 132a and the seventh connecting line segment 142a are parallel to each other.

[0175] In the above embodiment, the first connecting line segment 112a, the third connecting line segment 122a, the fifth connecting line segment 132a, and the seventh connecting line segment 142a are located in the second metal layer. Since the parallel connecting line segments are arranged on the same metal layer, the complexity of the wiring structure is reduced, which helps to simplify the stacking and etching processes of the metal layers during the manufacturing process.

[0176] In some embodiments, as shown in FIG. 1, the first connection line 112, the second connection line 122, the third connection line 132 and the fourth connection line 142 are disposed in the same metal layer, e.g., the first metal layer. Figure 9 In other embodiments, as shown in FIG. 2, at least one of the first connection line 112, the second connection line 122, the third connection line 132 and the fourth connection line 142 is disposed in a second metal layer different from the first metal layer, and the others are disposed in a third metal layer different from the first metal layer and the second metal layer, so that the first touch line group TP1, the second touch line group TP2, the third touch line group TP3 and the fourth touch line group TP4 are insulated at the overlapping positions.

[0177] Please refer to Figure 9 for a better understanding that part of the first connection line 112, the second connection line 122 and the fourth connection line 142 is disposed in the second metal layer, part of the third connection line 132 is disposed in the third metal layer, and the first touch line group TP1, the second touch line group TP2, the third touch line group TP3 and the fourth touch line group TP4 are insulated at the overlapping positions.

[0178] Correspondingly, as an example, at least one of the first connection line segment 112a, the third connection line segment 122a, the fifth connection line segment 132a and the seventh connection line segment 142a is in the second metal layer, and the others are in the third metal layer. The first connection line segment 112a, the third connection line segment 122a and the seventh connection line segment 142a are in the second metal layer, and the fifth connection line segment 132a is in the third metal layer.

[0179] The above embodiments can be set according to the actual design requirements when implemented.

[0180] Figure 10 is a cross-sectional structure diagram of part of the sub-pixel. In order to clearly show the film layer structure of the touch display panel, Figure 10 only the cross-sectional structure of one thin film transistor TFT in the sub-pixel is marked. As shown in Figure 10 , the film layer structure of the touch display panel can include a first conductive layer M1, a second conductive layer M2 and a third conductive layer M3.

[0181] As an example, the gate of the thin film transistor TFT can be located in the first conductive layer M1, the source and the drain of the thin film transistor TFT can be located in the second conductive layer M2, one of the source and the drain of the thin film transistor TFT can be connected to the pixel electrode E1 through the interconnection structure, and the third conductive layer M3 can be electrically connected to the common electrode E2 of the touch display panel through the interconnection structure.

[0182] In some possible embodiments of the present application, the gate line is disposed on the first conductive layer M1 and connected to the gate of the thin film transistor TFT; the data line S is disposed on the second conductive layer M2 and connected to the source or the drain of the thin film transistor TFT, and the potential of the pixel electrode E1 is controlled through the thin film transistor TFT, so as to control the orientation of the liquid crystal molecules and further control the display state of the sub-pixel.

[0183] The first metal layer is disposed in the same layer as the third conductive layer M3 and used for arranging the touch lines, such as the first touch line 111 and the second touch line 121. When touch occurs, the touch signal can be transmitted to the third conductive layer M3 through the touch line for sensing the touch.

[0184] Correspondingly, the third metal layer is disposed in the same layer as the first conductive layer M1 and used for arranging the connection lines, such as the first connection line 112 and the second connection line 122.

[0185] Based on the same inventive concept, the present application also provides a display device. Please refer to Figure 11 The display device 1 comprises the touch display panel 10 provided by the foregoing embodiments. The display device 1 can achieve the technical effects that the foregoing touch display panel 10 can achieve, and details are not described herein.

[0186] It can be understood that the display device 1 in the embodiments of the present application can be an LCD display device, electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, a wearable device, an Internet of Things device, or any product or component with a touch display function, and the embodiments of the present application do not limit this.

[0187] In the description of the present specification, the description of the terms "some embodiments", "as an example", "exemplarily", and the like means that the specific features, structures, materials, or characteristics described in combination with the embodiments or examples are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example.

[0188] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description concise, all possible combinations of the technical features of the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that they are within the scope of the present specification.

[0189] The above embodiments only express several implementation ways of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation to the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A touch display panel, characterized in that: include: A plurality of pixel units are arranged in an array along a first direction and a second direction in a display area of ​​the touch display panel, each of the pixel units including at least two sub-pixels arranged along the first direction; a plurality of data lines, the data lines extending along the second direction within the display area and arranged between two adjacent columns of the pixel units in the first direction, the data lines including data branch lines extending in the first direction, and the data lines being electrically connected to the sub-pixels in the corresponding pixel units through the data branch lines; a plurality of touch line groups, each of the touch line groups comprising at least two touch lines extending along the second direction within the display area, the touch lines being arranged between two adjacent columns of sub-pixels in the pixel unit in the first direction, and the touch lines overlapping the data branch lines; In the first direction, two adjacent touch lines belong to different touch line groups.

2. The touch display panel according to claim 1, wherein: The sub-pixels are of a dual-gate pixel structure, and each of the pixel units includes two sub-pixels arranged along the first direction; The touch display panel further includes a plurality of gate lines, each of the gate lines extending along the first direction within the display area, and each row of pixel units being electrically connected to two adjacent gate lines.

3. The touch display panel according to claim 2, wherein: In the first direction, each of the pixel units is electrically connected to an adjacent data line; In the second direction, two adjacent pixel units in a column of pixel units are electrically connected to different data lines.

4. The touch display panel according to claim 3, wherein: comprising a plurality of touch line sets repeatedly arranged along the first direction, each of the touch line sets comprising a first touch line group and a second touch line group arranged along the first direction; Each of the first touch line groups includes two first touch lines; Each of the second touch line groups includes two second touch lines; The first touch lines and the second touch lines are repeatedly arranged in sequence along the first direction.

5. The touch display panel according to claim 4, wherein: It also includes a non-display area located outside the display area, each of the first touch line group and the second touch line group corresponds to a pad, and the pad is provided in the non-display area; The first touch line group includes a first connecting line provided in the non-display area, for connecting two of the first touch lines with the corresponding pads; the second touch line group includes a second connecting line provided in the non-display area, for connecting two of the second touch lines with the corresponding pads; The first touch line and the second touch line are both provided on the first metal layer of the touch display panel; At least a portion of the first connection line and / or at least a portion of the second connection line is disposed on a second metal layer different from the first metal layer, so that the first touch line group and the second touch line group are insulated at the overlapped portion.

6. The touch display panel according to claim 5, wherein: The first connecting line includes a first connecting line segment extending along the first direction and a second connecting line segment extending along the second direction; The second connecting line includes a third connecting line segment extending along the first direction and a fourth connecting line segment extending along the second direction; The first connecting line segment is parallel to the third connecting line segment, and the first connecting line segment and the third connecting line segment are disposed in the second metal layer; At least a portion of the second connecting line is disposed on a second metal layer different from the first metal layer, so that the first touch line group and the second touch line group are insulated from each other at an overlapping portion.

7. The touch display panel according to claim 3, wherein: comprising a plurality of touch line sets repeatedly arranged along the first direction, each of the touch line sets comprising a first touch line group, a second touch line group and a third touch line group arranged along the first direction; Each of the first touch line groups includes two first touch lines; Each of the second touch line groups includes two second touch lines; Each of the third touch line groups includes two third touch lines; The first touch lines, the second touch lines and the third touch lines are repeatedly arranged in sequence along the first direction.

8. The touch display panel according to claim 7, wherein: It also includes a non-display area located outside the display area, each of the first touch line group and the second touch line group corresponds to a pad, and the pad is provided in the non-display area; The first touch line group includes a first connecting line provided in the non-display area, and configured to connect two first touch lines to the corresponding pads; The second touch line group includes a second connecting line provided in the non-display area, and configured to connect two second touch lines to the corresponding pads; The third touch line group includes a third connecting line provided in the non-display area, and configured to connect two of the third touch lines to the corresponding pads; The first touch line, the second touch line and the third touch line are all provided on the first metal layer of the touch display panel; The first connecting line is provided on the first metal layer; At least a portion of the second connection line and the third connection line is disposed in a second metal layer different from the first metal layer, so that the first touch line group, the second touch line group, and the third touch line group are insulated at their overlapping locations.

9. The touch display panel according to claim 8, wherein: The first connecting line includes a first connecting line segment extending along the first direction and a second connecting line segment extending along the second direction; The second connecting line includes a third connecting line segment extending along the first direction and a fourth connecting line segment extending along the second direction; The third connecting line includes a fifth connecting line segment extending along the first direction and a sixth connecting line segment extending along the second direction; The first connecting line segment, the third connecting line segment and the fifth connecting line segment are parallel to each other; The fourth connecting line segment and the second connecting line segment are respectively located in different metal layers at the overlapping portion; The overlapping parts of the fourth connecting line segment and the sixth connecting line segment are respectively located in different metal layers.

10. The touch display panel according to claim 7, wherein: It also includes a non-display area located outside the display area, each of the first touch line group, the second touch line group, and the third touch line group corresponds to a pad, and the pad is provided in the non-display area; The first touch line group includes a first connecting line provided in the non-display area, and configured to connect two first touch lines to the corresponding pads; The second touch line group includes a second connecting line provided in the non-display area, and configured to connect two second touch lines to the corresponding pads; The third touch line group includes a third connecting line provided in the non-display area, and configured to connect two of the third touch lines to the corresponding pads; The first touch line, the second touch line and the third touch line are all provided on the first metal layer of the touch display panel; The first connecting line is provided on the first metal layer; At least a portion of the second connecting line is disposed in a second metal layer different from the first metal layer, and at least a portion of the third connecting line is disposed in a third metal layer different from the first metal layer and the second metal layer; or At least a portion of the second connection line is disposed on the third metal layer, and at least a portion of the third connection line is disposed on the second metal layer, so that the first touch line group, the second touch line group, and the third touch line group are insulated at their overlapping locations.

11. The touch display panel according to claim 3, wherein: comprising a plurality of touch line sets repeatedly arranged along the first direction, each of the touch line sets comprising a first touch line group, a second touch line group, a third touch line group, and a fourth touch line group arranged along the first direction; Each of the first touch line groups includes two first touch lines; Each of the second touch line groups includes two second touch lines; Each of the third touch line groups includes two third touch lines; Each of the fourth touch line groups includes two fourth touch lines; The first touch line, the second touch line, the third touch line and the fourth touch line are repeatedly arranged in sequence along the first direction.

12. The touch display panel according to claim 11, wherein: It also includes a non-display area located outside the display area, wherein each of the first touch line group, the second touch line group, the third touch line group, and the fourth touch line group corresponds to a pad, and the pad is provided in the non-display area; The first touch line group includes a first connecting line provided in the non-display area, and used for connecting two first touch lines with corresponding pads; The second touch line group includes a second connecting line provided in the non-display area, and configured to connect two second touch lines to corresponding pads; The third touch line group includes a third connecting line provided in the non-display area, and used for connecting two third touch lines to corresponding pads; The fourth touch line group includes a fourth connecting line provided in the non-display area, and configured to connect two of the fourth touch lines to corresponding pads; The first touch line, the second touch line, the third touch line and the fourth touch line are all arranged on the first metal layer of the touch display panel; at least a portion of the first connecting line, the second connecting line, the third connecting line and the fourth connecting line are arranged on a second metal layer different from the first metal layer, so that the first touch line group, the second touch line group, the third touch line group and the fourth touch line group are insulated at the overlapping parts.

13. The touch display panel according to claim 12, wherein: The first connecting line includes a first connecting line segment extending along the first direction and a second connecting line segment extending along the second direction; The second connecting line includes a third connecting line segment extending along the first direction and a fourth connecting line segment extending along the second direction; The third connecting line includes a fifth connecting line segment extending along the first direction and a sixth connecting line segment extending along the second direction; The fourth connecting line includes a seventh connecting line segment extending along the first direction and an eighth connecting line segment extending along the second direction; The first connecting line segment, the third connecting line segment, the fifth connecting line segment and the seventh connecting line segment are parallel to each other; The first connecting line segment, the third connecting line segment, the fifth connecting line segment, and the seventh connecting line segment are located in the second metal layer.

14. The touch display panel according to claim 11, wherein: It also includes a non-display area located outside the display area, wherein each of the first touch line group, the second touch line group, the third touch line group, and the fourth touch line group corresponds to a pad, and the pad is provided in the non-display area; The first touch line group includes a first connecting line provided in the non-display area, and used for connecting two first touch lines with corresponding pads; The second touch line group includes a second connecting line provided in the non-display area, and configured to connect two second touch lines to corresponding pads; The third touch line group includes a third connecting line provided in the non-display area, and used for connecting two third touch lines to corresponding pads; The fourth touch line group includes a fourth connecting line provided in the non-display area, and configured to connect two of the fourth touch lines to corresponding pads; The first touch line, the second touch line, the third touch line and the fourth touch line are all provided on the first metal layer of the touch display panel; At least one of the first connecting line, the second connecting line, the third connecting line, and the fourth connecting line is arranged in a second metal layer different from the first metal layer, and the others are arranged in a third metal layer different from the first metal layer and the second metal layer, so that the first touch line group, the second touch line group, the third touch line group, and the fourth touch line group are insulated at the overlapping parts.

15. The touch display panel according to claim 14, wherein: The first connecting line includes a first connecting line segment extending along the first direction and a second connecting line segment extending along the second direction; The second connecting line includes a third connecting line segment extending along the first direction and a fourth connecting line segment extending along the second direction; The third connecting line includes a fifth connecting line segment extending along the first direction and a sixth connecting line segment extending along the second direction; The fourth connecting line includes a seventh connecting line segment extending along the first direction and an eighth connecting line segment extending along the second direction; The first connecting line segment, the third connecting line segment, the fifth connecting line segment and the seventh connecting line segment are parallel to each other; At least one of the first connecting line segment, the third connecting line segment, the fifth connecting line segment, and the seventh connecting line segment is located in the second metal layer, and the others are located in the third metal layer.

16. A display device, characterized in that: The touch display panel comprises the touch display panel according to any one of claims 1 to 15.

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