Patent Publication Number: US-2023147415-A1

Title: Touch display panel and display device

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority of Chinese Patent Application No. 202111308501.2, filed on Nov. 5, 2021, the entire content of which is hereby incorporated by reference. 
     FIELD OF THE DISCLOSURE 
     The present disclosure generally relates to the field of display technology and, more particularly, relates to a touch display panel and a display device. 
     BACKGROUND 
     In existing technologies, a touch layer is usually disposed on a light-exiting surface of a display panel, such that the display panel may have a touch function. In an existing self-capacitive touch display panel, a touch layer may include touch electrodes and touch leads disposed on different metal layers. To improve conductivity and reduce production cost, the touch electrodes and the touch leads may be made of metal materials. 
     However, when metal materials are used to make touch electrodes and touch leads, display effect of a display device may be affected. 
     SUMMARY 
     One aspect of the present disclosure includes a touch display panel. The touch display panel includes a substrate, and a touch layer located on a side of the substrate. The touch layer comprises a first metal layer, an insulation layer, and a second metal layer stacked in sequence. The touch display panel also includes a plurality of touch electrodes located in the second metal layer. A touch electrode of the plurality of touch electrodes comprises a first electrode line extending along a first direction and a second electrode line extending along the second direction, and the first direction intersects the second direction. The touch display panel also includes a plurality of touch leads. The touch electrode is electrically connected to a corresponding touch lead of the plurality of touch leads. The touch lead comprises a first wiring portion extending along the first direction. Along a direction perpendicular to a plane where the substrate is located, the first wiring portion and the first electrode line at least partially overlap. The first wiring portion is at least partially located in the first metal layer. 
     Another aspect of the present disclosure includes a display device. The display device includes a touch display panel. The touch display panel includes a substrate, and a touch layer located on a side of the substrate. The touch layer comprises a first metal layer, an insulation layer, and a second metal layer stacked in sequence. The touch display panel also includes a plurality of touch electrodes located in the second metal layer. A touch electrode of the plurality of touch electrodes comprises a first electrode line extending along a first direction and a second electrode line extending along the second direction, and the first direction intersects the second direction. The touch display panel also includes a plurality of touch leads. The touch electrode is electrically connected to a corresponding touch lead of the plurality of touch leads. The touch lead comprises a first wiring portion extending along the first direction. Along a direction perpendicular to a plane where the substrate is located, the first wiring portion and the first electrode line at least partially overlap. The first wiring portion is at least partially located in the first metal layer. 
     Other aspects of the present disclosure may be understood by those skilled in the art in light of the description, the claims, and the drawings of the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The following drawings are merely examples for illustrative purposes according to various disclosed embodiments and are not intended to limit the scope of the present disclosure. 
         FIG.  1    illustrates a schematic top view of a touch display panel consistent with the disclosed embodiments of the present disclosure; 
         FIG.  2    illustrates an enlarged schematic diagram of part A in the touch display panel shown in  FIG.  1   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  3    illustrates a cross-sectional view along B-B′ direction of the touch display panel shown in  FIG.  2   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  4    illustrates a cross-sectional view along C-C′ direction of the touch display panel shown in  FIG.  2   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  5    illustrates another enlarged schematic diagram of part A in the touch display panel shown in  FIG.  1   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  6    illustrates a cross-sectional view along W-W′ direction of the touch display panel shown in  FIG.  5   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  7    illustrates a partial cross-sectional view of a touch layer in a touch display panel, consistent with the disclosed embodiments of the present disclosure; 
         FIG.  8    illustrates another enlarged schematic diagram of part A in the touch display panel shown in  FIG.  1   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  9    illustrates a cross-sectional view along D-D′ direction of the touch display panel shown in  FIG.  8   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  10    illustrates another enlarged schematic diagram of part A in the touch display panel shown in  FIG.  1   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  11    illustrates another enlarged schematic diagram of part A in the touch display panel shown in  FIG.  1   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  12    illustrates a cross-sectional view along E-E′ direction of the touch display panel shown in  FIG.  11   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  13    illustrates a cross-sectional view along F-F′ direction of the touch display panel shown in  FIG.  11   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  14    illustrates a partial schematic diagram of a touch layer in a touch display panel consistent with the disclosed embodiments of the present disclosure; 
         FIG.  15    illustrates a cross-sectional view along G-G′ direction of the touch display panel shown in  FIG.  11   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  16    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure; 
         FIG.  17    illustrates an enlarged schematic diagram of part J in the touch display panel shown in  FIG.  16   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  18    illustrates another enlarged schematic diagram of part A in the touch display panel shown in  FIG.  1   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  19    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure; 
         FIG.  20    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure; 
         FIG.  21    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure; 
         FIG.  22    illustrates an enlarged schematic diagram of part K in the touch display panel shown in  FIG.  21   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  23    illustrates another enlarged schematic diagram of part K in the touch display panel shown in  FIG.  21   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  24    illustrates a cross-sectional view along L-L′ direction of the touch display panel shown in  FIG.  23   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  25    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure; 
         FIG.  26    illustrates an enlarged schematic diagram of part M in the touch display panel shown in  FIG.  25   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  27    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure; 
         FIG.  28    illustrates an enlarged schematic diagram of part N in the touch display panel shown in  FIG.  27   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  29    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure; 
         FIG.  30    illustrates an enlarged schematic diagram of part R in the touch display panel shown in  FIG.  29   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  31    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure; 
         FIG.  32    illustrates an enlarged schematic diagram of part S in the touch display panel shown in  FIG.  31   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  33    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure; 
         FIG.  34    illustrates an enlarged schematic diagram of part T in the touch display panel shown in  FIG.  33   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  35    illustrates another enlarged schematic diagram of part R in the touch display panel shown in  FIG.  29   , consistent with the disclosed embodiments of the present disclosure; 
         FIG.  36    illustrates a cross-sectional view along U-U′ direction of the touch display panel shown in  FIG.  35   , consistent with the disclosed embodiments of the present disclosure; and 
         FIG.  37    illustrates a schematic top view of a display device consistent with the disclosed embodiments of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     To make the objectives, technical solutions and advantages of the present disclosure clearer and more explicit, the present disclosure is described in further detail with accompanying drawings and embodiments. It should be understood that the specific exemplary embodiments described herein are only for explaining the present disclosure and are not intended to limit the present disclosure. 
     Technologies, methods, and equipment known to those of ordinary skill in relevant fields may not be discussed in detail, but where appropriate, these technologies, methods, and equipment should be regarded as part of the specification. 
     In an example of an embodiment shown and discussed herein, a specific value is exemplary only, not a limitation. Accordingly, another example of the embodiment may have a different value. 
     Reference will now be made in detail to embodiments of the present disclosure, which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. 
       FIG.  1    illustrates a schematic top view of a touch display panel consistent with the disclosed embodiments of the present disclosure.  FIG.  2    illustrates an enlarged schematic diagram of part A in the touch display panel shown in  FIG.  1   .  FIG.  3    illustrates a cross-sectional view along B-B′ direction of the touch display panel shown in  FIG.  2   . A section along B-B′ refers to a section in a direction parallel to a second direction and perpendicular to the substrate. With reference to  FIGS.  1 - 3   , the touch display panel may include a substrate  100 . The substrate  100  may be a rigid substrate or a flexible substrate. When the substrate  100  is a rigid substrate, the substrate  100  may be a glass substrate. When the substrate  100  is a flexible substrate, the substrate  100  may be a polyimide (PI) substrate. 
     The touch display panel may also include a touch layer  200 . The touch layer  200  is located on a side of the substrate  100 . The touch layer  200  may include a first metal layer  210 , an insulation layer  220 , and a second metal layer  230  stacked in sequence. It should be noted that  FIG.  3    exemplarily shows that, in the touch layer  200 , the second metal layer  230  is located on a side of the first metal layer  210  away from the substrate  100 . In some other embodiments of the present disclosure, in the touch layer  200 , the first metal layer  210  may be located on a side of the second metal layer  230  away from the substrate  100 . Optionally, the touch layer  200  may also include a planarization layer  240 . When the second metal layer  230  in the touch layer  200  is located on the side of the first metal layer  210  away from the substrate  100 , the planarization layer is located on a side of the second metal layer  230  away from the substrate  100 . When the first metal layer  210  in the touch layer  200  is located on the side of the second metal layer  230  away from the substrate  100 , the planarization layer is located on the side of the first metal layer  210  away from the substrate  100 . 
     The touch display panel may also include a plurality of touch electrodes  300  and a plurality of touch leads  400 . The touch electrodes  300  are insulated from each other. The touch electrode  300  is located in the second metal layer  230 . In one embodiment, each of the touch leads  400  may be located in the first metal layer  210 . In some other embodiments, part of the touch leads  400  is located in the first metal layer  210  and part of the touch leads  400  is located in the second metal layer  230 . The touch electrodes  300  and the touch leads  400  are made of metal materials. Compared with semiconductor materials, metal materials may improve touch performance and bending performance of the touch electrodes  300  and the touch leads  400 . Exemplarily, the touch electrodes  300  and the touch leads  400  may be made of materials including Cr, Ni, Cu, Al, Ag, Mo, Au, Ti, or a combination thereof. The touch electrode  300  may include a first electrode line  310  extending in a first direction X and a second electrode line  320  extending in the second direction Y. The first direction X intersects the second direction Y. Optionally, the first direction X is perpendicular to the second direction Y. The touch electrode  300  may be a grid structure formed by a plurality of the first electrode lines  310  and a plurality of the second electrode lines  320 . 
     One touch electrode  300  corresponds to at least one touch lead  400 . The touch electrode  300  is electrically connected to the touch lead  400  which the touch electrode  300  corresponds to, and the touch electrode  300  is insulated from other touch leads  400 . The other touch leads  400  refer to the touch leads  400  except the touch lead  400  electrically connected to the touch electrode  300 . Optionally, the touch electrode  300  and the touch lead  400  which the touch electrode  300  correspond to are electrically connected through a via V. Along a direction perpendicular to the plane where the substrate  100  is located, the via V is located at an overlap of the touch lead  400  and the touch electrode  300  electrically connected to the touch lead. Accordingly, electrical connection between the touch electrode  300  and the corresponding touch lead  400  may be achieved through the via V. 
     The touch lead  400  may include a first wiring portion  410  extending along the first direction X. The first electrode line  310  and the first wiring portion  410  each extend along the first direction X. The first electrode line  310  is located in the second metal layer  230 , and the first wiring portion  410  is at least partially located in the first metal layer  210 . Along a direction perpendicular to the plane where the substrate  100  is located, the first wiring portion  410  and the first electrode line  310  at least partially overlap. A part of the first wiring portion  410  located in the first metal layer  210  at least partially overlaps the first electrode line  310 . Since the first wiring portion  410  and the first electrode line  310  at least partially overlap in the direction perpendicular to the plane where the substrate  100  is located, shielding of light exited from the touch display panel due to disposing the touch leads  400  in the touch display panel may be reduced. Accordingly, impact of deposing the touch leads on the display effect of the touch display panel may be reduced. In addition, since the touch lead  400  is made of a metal material, the touch lead may have reflective characteristics. Along the direction perpendicular to the plane where the substrate  100  is located, the first wiring portion  410  and the first electrode line  310  at least partially overlap. Accordingly, a problem of visible patterns of the touch leads  400  caused by disposing the touch leads  400  on the touch display panel may be alleviated. 
     It should be noted that, to clearly illustrate relationships between the touch electrodes and the touch leads in  FIG.  2   , components such as pixels are not shown in  FIG.  2   . It does not mean that the touch display panel shown in  FIG.  2    does not include components such as pixels. In other embodiments of the present disclosure, schematic ways of  FIG.  2    may be applied to other corresponding views. 
     With continuous reference to  FIGS.  1  to  3   , in some embodiments, the touch display panel may include an array layer  10 , a light emitting layer  20 , and an encapsulation layer  30 , arranged in sequence. The light-emitting layer  20  is located on a side of the array layer  10  away from the substrate  100 . Optionally, the array layer  10  may include a pixel circuit disposed between the substrate  100  and the light-emitting layer  20 . The pixel circuit may include a thin film transistor T. The light-emitting layer  20  may include a pixel definition layer  21  and an organic light-emitting device. The organic light-emitting device may include an anode  22 , a cathode  23 , and an organic light-emitting material  24  located between the anode  22  and the cathode  23 . The encapsulation layer  30  may include a thin-film encapsulation structure formed by alternately stacking a plurality of inorganic layers and a plurality of organic layers to encapsulate the organic light-emitting device. Exemplarily, the encapsulation layer  30  may be an encapsulation structure of an inorganic layer-organic layer-inorganic layer stack. In one embodiment, the touch layer  200  has an on-cell structure. The touch layer  200  is located on the encapsulation layer  30 , that is, the touch electrodes  300  and the touch leads  400  are disposed on the encapsulation layer  30 . The on-cell structure only needs to form a simple electrode pattern on the touch layer  200 , and thus technical difficulty may be low, and product yield may be high. Moreover, an effective display area in the pixel display area may not be reduced, and thus the display effect of the touch display panel may not be decreased. In addition, when the touch layer  200  is disposed on the side of the packaging layer  30  away from the substrate  100 , and a touch body touches the touch display panel, the touch layer  200  may be closer to the touch body. As a result, the touch electrodes  300  located in the touch layer  200  may sense touch signals more sensitively, and thus the touch sensitivity of the touch display panel may be improved. 
     In some other embodiments of the present disclosure, the touch layer may also be disposed on other film layers. In some other embodiments of the present disclosure, the touch layer may be disposed in other types of display panels. 
       FIG.  4    illustrates a cross-sectional view along C-C′ direction of the touch display panel shown in  FIG.  2   . With reference to  FIGS.  2  and  4   , in some embodiments of the present disclosure, the touch lead  400  may include a first touch lead  400   a . The first touch lead  400   a  is located in the first metal layer  210 . The touch electrode  300  may include a first touch electrode  300   a . The first touch electrode  300   a  is located in the second metal layer  230 . The first metal layer  210  is located on a side of the insulation layer  220  close to the substrate  100 . The second metal layer  230  is located on a side of the insulation layer  220  away from the substrate  100 . With this configuration, when a touch body touches the touch display panel, the touch electrode  300  is closer to the touch body. Accordingly, the touch electrode  300  may sense touch signals more sensitively, and thus the touch sensitivity of the touch display panel may be improved. 
     An area where the first touch electrode  300   a  is located is a first area Q 1 . In the first area Q 1 , the first electrode line  310  of the first touch electrode  300   a  covers the first wiring portion  410  of the first touch lead  400   a  in a direction perpendicular to the plane where the substrate  100  is located. The first electrode line  310  of the first touch electrode  300   a  plays a role of shielding the first wiring portion  410  of the first touch lead  400   a . As such, during touch detection, generation of a signal between the first trace portion  410  of the first touch lead  400   a  and a finger, which may cause errors in the touch detection, may be avoided. Accordingly, touch accuracy may be improved. 
       FIG.  5    illustrates another enlarged schematic diagram of part A in the touch display panel shown in  FIG.  1   .  FIG.  6    illustrates a cross-sectional view along W-W′ direction of the touch display panel shown in  FIG.  5   . Optionally, a width of the first electrode line  310  of the first touch electrode  300   a  in the second direction Y is greater than a width of the first wiring portion  410  of the first touch lead  400   a  in the second direction Y. Accordingly, the first electrode line  310  of the first touch electrode  300   a  may shield the first wiring portion  410  of the first touch lead  400   a.    
     It should be noted that, in a touch display panel provided by the present disclosure, at least one of the touch leads  400  is the first touch lead  400   a . The first touch lead  400   a  may be any touch lead  400 . In one embodiment, each of the touch leads  400  may be the first touch lead  400   a . In some other embodiments of the present disclosure, part of the touch leads  400  may be the first touch leads  400   a , and other types of touch leads  400  may also exist in the touch display panel. 
     Similarly, in the touch display panel provided by the present disclosure, at least one of the touch electrodes  300  is the first touch electrode  300   a , and the first touch electrode  300   a  may be any touch electrode  300 . In one embodiment, each of the touch electrodes  300  may be the first touch electrode  300   a . In some other embodiments of the present disclosure, part of the touch electrodes  300  may be the first touch electrodes  300   a , and other types of touch electrodes  300  may also exist in the touch display panel. Exemplarily, the touch electrodes  300  arranged in a row direction may be set as the first touch electrodes  300   a , and the touch electrodes  300  arranged in a column direction may also be set as the first touch electrodes  300   a.    
       FIG.  7    illustrates a partial cross-sectional view of a touch layer in a touch display panel. Referring to  FIG.  7   , in the display panel, in the direction perpendicular to the plane where the display panel is located, when the metal line  1  and the metal line  2  in metal layers of two adjacent layers at least partially overlap, due to manufacturing techniques, a metal puncture problem may occur at an overlap place. The metal wire  1  may be made first, and the metal wire  2  is made subsequently. When the metal wire  1  is made, an edge of the metal wire  1  may have a thorn-like structure  4  because of an etching process. The thorn-like structure  4  may pierce the insulation layer between two adjacent metal layers, resulting in a short circuit between the layer metal line  1  and the layer metal line  2 . Further, after the metal wire  1  is made, the boundary position of the metal wire  1  may have a stepped structure. Along the direction perpendicular to the plane where the display panel is located, the metal wires  1  and the metal wires  2  in the metal layers of two adjacent layers at least partially overlap. When the metal wire  2  needs to be fabricated above the stepped structure subsequently, in an exposure process for the fabrication of the metal wire  2 , since the boundary position of the metal wire  1  has a stepped structure, the photoresist may flow into the junction of the height difference of the insulation layer. Accordingly, metal etching residue may occur in the junction, increasing a risk of a short circuit between the metal wire  1  and the metal wire  2 . Further, along the direction perpendicular to the plane where the display panel is located, the more the overlap area of the metal wire  1  and the metal wire  2  in the metal layers of two adjacent layers, the greater the risk of a short circuit between the metal wire  1  and the metal wire  2  is. 
     With reference to  FIGS.  1  to  3   , in a touch display panel provided by the present disclosure, the first electrode line  310  in the touch electrode  300  and the first wiring portion  410  in the touch lead  400  each extend along the first direction X. The first electrode line  310  is located in the second metal layer  230 . The first wiring portion  410  is at least partially located in the first metal layer  210 . Along the direction perpendicular to the plane where the substrate  100  is located, the first wiring portion  410  and the first electrode line  310  at least partially overlap. The larger the overlap area between the vertical projection of the first wiring portion  410  on the plane where the substrate  100  is located and the vertical projection of the first electrode line  310  on the plane where the substrate  100  is located, the greater the risk of a short circuit between the first wiring portion  410  and the first electrode line  310 , and thus the greater the risk of a short circuit between the touch electrodes  300  and the touch leads  400  that are insulated from each other. 
     Based on the above research, the present disclosure provides a touch display panel. Some embodiments of the touch display panel provided by the present disclosure are described below. 
       FIG.  8    illustrates another enlarged schematic diagram of part A in a touch display panel shown in  FIG.  1   .  FIG.  9    illustrates a cross-sectional view along D-D′ direction of the touch display panel shown in  FIG.  8   . With reference to  FIGS.  8  and  9   , in some embodiments, the touch lead  400  may include a second touch lead  400   b . The second touch lead  400   b  is located in the first metal layer  210 . The touch electrode  300  may include a second touch electrode  300   b . The second touch electrode  300   b  is located in the second metal layer  230 . Optionally, the second touch lead  400   b  and the second touch electrode  300   b  are insulated from each other. 
     One second touch electrode  300   b  may include at least two adjacent first electrode lines  310  arranged along the first direction X, and a first interval q 1  is located between the two adjacent first electrode lines  310 . Along the direction perpendicular to the plane where the substrate  100  is located, the first wiring portion  410  of the second touch lead  400   b  overlaps the first interval q 1 . That is, the first electrode line  310  is not disposed at an area corresponding to the first interval q 1  in the touch display panel, and only the first wiring portion  410  of the second touch lead  400   b  is provided in this area. As such, an overlap area of the vertical projection of the first wiring portion  410  on the plane where the substrate  100  is located and the vertical projection of the first electrode line  310  on the plane where the substrate  100  is located may be reduced. Accordingly, the risk of a short circuit between the first wiring portion  410  and the first electrode line  310  may be reduced, and the risk of a short circuit between the touch electrode  300  and the touch lead  400  that are insulated from each other may be reduced. 
     It should be noted that the two adjacent first electrode lines  310  arranged along the first direction X means that there is no other first electrode line  310  between the two first electrode lines  310  arranged along the first direction X. 
     Optionally, in the touch electrodes  300  and the touch leads  400  that are electrically connected to each other, there is no need to reduce the overlap area between the vertical projection of the first wiring portion  410  on the plane where the substrate  100  is located and the vertical projection of the first electrode line  310  on the plane where the substrate  100  is located. 
     It should be noted that, in a touch display panel provided by the present disclosure, at least one of the touch leads  400  is the first touch lead  400   a . The first touch lead  400   a  may be any touch lead  400 . In one embodiment, each of the touch leads  400  may be the first touch lead  400   a . In some other embodiments of the present disclosure, part of the touch leads  400  may be the first touch leads  400   a , and other types of touch leads  400  may also exist in the touch display panel. 
     Similarly, in a touch display panel provided by the present disclosure, at least one of the touch electrodes  300  is the first touch electrode  300   a , and the first touch electrode  300   a  may be any touch electrode  300 . In one embodiment, each of the touch electrodes  300  may be the first touch electrode  300   a . In some other embodiments of the present disclosure, part of the touch electrodes  300  may be the first touch electrodes  300   a , and other types of touch electrodes  300  may also exist in the touch display panel. Exemplarily, the touch electrodes  300  arranged in a row direction may be set as the first touch electrodes  300   a , and the touch electrodes  300  arranged in a column direction may also be set as the first touch electrodes  300   a.    
       FIG.  10    illustrates another enlarged schematic diagram of part A in the touch display panel shown in  FIG.  1   . With reference to  FIG.  10   , optionally, in one second touch electrode  300   b , in the direction perpendicular to the plane where the substrate  100  is located, part of the first wiring portions  410  only overlaps an intersection region of the first electrode line  310  and the second electrode line  320 . Thus, the overlap area between the vertical projection of the first wiring portion  410  on the plane where the substrate  100  is located and the vertical projection of the first electrode line  310  on the plane where the substrate  100  is located may be further reduced. Accordingly, the risk of a short circuit between the first wiring portion  410  and the first electrode line  310  may be reduced, and the risk of a short circuit between the touch electrode  300  and the touch lead  400  that are insulated from each other may be reduced. 
       FIG.  11    illustrates another enlarged schematic diagram of part A in the touch display panel shown in  FIG.  1   .  FIG.  12    illustrates a cross-sectional view along E-E′ direction of the touch display panel shown in  FIG.  11   . With reference to  FIGS.  11  and  12   , in some embodiments, the touch lead  400  may include a third touch lead  400   c . The third touch lead  400   c  and touch electrodes  300  other than the touch electrode  300  electrically connected to the third touch lead  400   c  are insulated from each other. The first wiring portion  410  of the third touch lead  400   c  is partially located in the second metal layer  230 . In an area corresponding to the touch electrode  300  insulated from the third touch lead  400   c , since the first wiring portion  410  in the third touch lead  400   c  is partially located in the second metal layer  230 , the area where the first wiring portion  410  is located in the second metal layer  230  may not be disposed with the first electrode line  310 . That is, along the direction perpendicular to the plane where the substrate  100  is located, the part of the first wiring portion  410  located in the second metal layer  230  does not overlap the first electrode line  310 . Thus, the overlap area between the vertical projection of the first wiring portion  410  on the plane where the substrate  100  is located and the vertical projection of the first electrode line  310  on the plane where the substrate  100  is located may be reduced. Accordingly, the risk of a short circuit between the first wiring portion  410  and the first electrode line  310  may be reduced, and the risk of a short circuit between the touch electrode  300  and the touch lead  400  that are insulated from each other may be reduced. 
     It should be noted that, in a touch display panel provided by the present disclosure, at least one touch lead  400  is the third touch lead  400   c . The third touch lead  400   c  may be any touch lead  400 . In one embodiment, each of the touch leads  400  may be the third touch lead  400   c . In some other embodiments of the present disclosure, part of the touch leads  400  may be the third touch leads  400   c , and other types of touch leads  400  may also exist in the touch display panel. 
     It should be noted that, in the third touch leads  400   c , one section of the lead may be located in the second metal layer  230 , or a plurality of sections of the lead may be located in the second metal layer  230 . 
       FIG.  13    illustrates a cross-sectional view along F-F′ direction of the touch display panel shown in  FIG.  11   . With reference to  FIGS.  11  and  13   , in some embodiments, the width of the touch lead  400  in the second direction Y is approximately equal to the width of the first electrode line  310  in the second direction Y. Along the direction perpendicular to the plane where the substrate  100  is located, the first wiring portion  410  in the touch lead  400  and the first electrode line  310  at least partially overlap. Accordingly, influence of the increase of the reflective area caused by disposing the touch lead  400  may be decreased, and a problem of visible patterns of the touch leads  400  caused by disposing the touch leads  400  on the touch display panel may be alleviated. 
     It should be noted that  FIGS.  11  and  13    exemplarily show that the width of the touch lead  400  in the second direction Y may be approximately equal to the width of the first electrode line  310  in the second direction Y.  FIG.  14    illustrates a partial schematic diagram of a touch layer in a touch display panel consistent with the disclosed embodiments of the present disclosure. As shown in  FIG.  14   , optionally, the first metal layer  210  is located on a side of the insulation layer  220  close to the substrate, and the touch electrode  300  is located on a side of the touch lead  400  away from the substrate. The width of the touch lead  400  in the second direction Y may be greater than the width of the first electrode line  310  in the touch electrode  300  in the second direction Y. Even though the edge of the touch lead  400  may include a thorn-like structure due to the etching residue, when the thorn-like structure pierces the insulation layer  220 , since the width of the touch lead  400  is greater than the width of the first electrode line  310  in the touch electrode  300 , a certain distance between the thorn-like structure at the edge of the touch lead  400  and the first electrode line  310  may exist. Accordingly, the risk of metal puncture between the first wiring portion  410  and the first electrode line  310  may be reduced, and the risk of a short circuit between the touch electrode  300  and the touch lead  400  that are insulated from each other may be reduced. Further, after the first wiring portion  410  is manufactured, the boundary of the first wiring portion  410  may include a stepped structure. To subsequently fabricate the first electrode line  310  on the stepped structure, in a photolithography process, a photoresist needs to be coated on a region of the second metal layer  230  where the first electrode line  310  is formed. Since the width of the first electrode line  310  in the second direction Y may be smaller than the width of the first wiring portion  410  in the second direction Y, a distance between the coating position of the photoresist and the height-difference junction of the insulation layer  220  may exist. Accordingly, the photoresist may be prevented from flowing into the height-difference junction of the insulation layer  220 . As such, occurrence of metal etching residue at the height-difference junction may be avoided. Accordingly, risk of a short circuit between the touch electrode  300  and the touch lead  400  that are insulated from each other may be reduced, and risk of a short circuit between two adjacent touch electrodes may be reduced. 
       FIG.  15    illustrates a cross-sectional view along G-G′ direction of the touch display panel shown in  FIG.  11   . With reference to  FIGS.  11 ,  12  and  15   , in some embodiments, the first wiring portion  410  in the third touch lead  400   c  may include a first sub-portion  411  and a second sub-portion  412  that are electrically connected. The first sub-portion  411  is located in the first metal layer  210 , and the second sub-portion  412  is located in the second metal layer  230 . 
     The touch electrode  300  may include a third touch electrode  300   c . One third touch electrode  300   c  may include at least two adjacent second electrode lines  320  arranged along the second direction Y. A second interval q 2  may be located between the two adjacent second electrode lines  320 . Along the direction perpendicular to the plane where the substrate  100  is located, the second sub-portion  412  overlaps the second interval q 2 . The second sub-portion  412  extends through the second interval q 2 , and the second sub-portion  412  and the third touch electrode  300   c  do not overlap. In this way, the second sub-portion  412  in the first wiring portion  410  of the third touch lead  400   c  may be located in the second metal layer  230 , and meanwhile, the third touch lead  400   c  may be insulated from a part of the third touch electrode  300   c.    
     The first sub-portion  411  in the first wiring portion  410  of the third touch lead  400   c  is located in the first metal layer  210 . Along the direction perpendicular to the plane where the substrate  100  is located, the third touch electrode  300   c  partially overlaps the first sub-portion  411 . Accordingly, signal transmission between each electrode line in the third touch electrode  300   c  may be realized. 
     It should be noted that the two adjacent second electrode lines  320  arranged along the second direction Y means that there is no other second electrode line  320  between the two second electrode lines  320  arranged along the second direction Y. 
     It should be noted that, in the first wiring portion  410  of the third touch lead  400   c , numbers of the first sub-portion  411  and the second sub-portion  412  may be set according to actual production requirements. 
     It should be noted that, in a touch display panel provided by the present disclosure, at least one touch electrode  300  may be the third touch electrode  300   c . The third touch electrode  300   c  may be any touch electrode  300 . In one embodiment, each of the touch electrodes  300  may be the third touch electrodes  300   c . In some other embodiments of the present disclosure, part of the touch electrodes  300  may be the third touch electrodes  300   c , and other types of touch electrodes  300  may also exist in the touch display panel. Exemplarily, the touch electrodes  300  arranged in a row direction may be set as the third touch electrodes  300   c , and the touch electrodes  300  arranged in a column direction may also set as the third touch electrodes  300   c.    
     It should be noted that  FIG.  11    exemplarily shows structures of the third touch electrode  300   c  and the third touch lead  400   c  in the touch display panel. In some other embodiments of the present disclosure, the third touch electrode  300   c  and the third touch lead  400   c  in other types of touch display panels may have similar configurations.  FIG.  16    illustrates a schematic top view of another touch display panel.  FIG.  17    illustrates an enlarged schematic diagram of part J in a touch display panel shown in  FIG.  16   . With reference to  FIGS.  16  and  17   , in some embodiments, the first wiring portion  410  in the third touch lead  400   c  may include a first sub-portion  411  and a second sub-portion  412  that are electrically connected. The first sub-portion  411  is located in the first metal layer  210 , and the second sub-portion  412  is located in the second metal layer  230 . The touch electrode  300  may include a third touch electrode  300   c . One third touch electrode  300   c  may include at least two adjacent second electrode lines  320  arranged along the second direction Y. A second interval q 2  may be located between the two adjacent second electrode lines  320 . Along the direction perpendicular to the plane where the substrate  100  is located, the second sub-portion  412  overlaps the second interval q 2 . The second sub-portion  412  extends through the second interval q 2 , and the second sub-portion  412  and the third touch electrode  300   c  do not overlap. In this way, the second sub-portion  412  in the first wiring portion  410  of the third touch lead  400   c  may be located in the second metal layer  230 , and meanwhile, the third touch lead  400   c  may be insulated from a part of the third touch electrode  300   c . The first sub-portion  411  in the first wiring portion  410  of the third touch lead  400   c  is located in the first metal layer  210 . Along the direction perpendicular to the plane where the substrate  100  is located, the third touch electrode  300   c  partially overlaps the first sub-portion  411 . Accordingly, signal transmission between each electrode line in the third touch electrode  300   c  may be realized. 
     In some embodiments, along the direction perpendicular to the plane where the substrate is located, in at least one third touch electrode, only one electrode line overlaps the first sub-portion. 
     With continuous reference to  FIG.  17   , along the direction perpendicular to the plane where the substrate  100  is located, in at least one third touch electrode  300   c , only one first electrode line  310  overlaps the first sub-portion  411 . The first electrode line  310  is only connected to two second electrode lines  320 . Accordingly, the overlap area of the vertical projection of the first wiring portion  410  on the plane where the substrate  100  is located and the vertical projection of the first electrode line  310  on the plane where the substrate  100  is located may be minimized, and meanwhile, signal transmission between each electrode line in the third touch electrode  300   c  may be realized. 
       FIG.  18    illustrates another enlarged schematic diagram of part A in the touch display panel shown in  FIG.  1   . With reference to  FIG.  18   , along the direction perpendicular to the plane where the substrate  100  is located, in at least one third touch electrode  300   c , only one second electrode line  320  overlaps the first sub-portion  411 . As a result, the overlap area of the vertical projection of the first wiring portion  410  on the plane where the substrate  100  is located and the vertical projection of the first electrode line  310  on the plane where the substrate  100  is located may be minimized, and meanwhile, signal transmission between each electrode line in the third touch electrode  300   c  may be realized. 
       FIG.  19    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure. As shown in  FIG.  19   , in some embodiments, the touch display panel may include at least one bending area NF. The touch display panel is a bendable display panel, and a portion of the touch display panel located in the bending area NF may be bent. The bending area NF may include a third touch lead (not shown in  FIG.  19   ). Exemplarily, a structure of the third touch lead in the bending area NF may refer to the structure of the third touch lead  400   c  in  FIG.  11   . In an area corresponding to the touch electrode  300  that is insulated from the third touch lead  400   c , since the first wiring portion  410  in the third touch lead  400   c  is partially located in the second metal layer  230 , the area of the second metal layer  230  for disposing the first wiring portion  410  may not be disposed with the first electrode line  310 . Accordingly, wirings in the first metal layer  210  corresponding to this area may be reduced, and thus the bending stress in this area may be reduced. In the bending area NF, at least part of the touch leads are third touch leads, and thus bending of the bending area NF may be achieved. 
     It should be noted that,  FIG.  19    exemplarily shows that the touch display panel may include a bending area NF. In some other embodiments of the present disclosure, the touch display panel may include two or more bending areas NF. 
     In one embodiment, the touch display panel may include a bending area. The third touch lead  400   c  in the bending area may include a structure of the third touch lead  400   c  described in  FIG.  11   . In some other embodiments of the present disclosure, the third touch lead  400   c  in the bending area may include other structures. 
       FIG.  20    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure. With reference to  FIG.  20   , in some embodiments, the touch display panel may be a bendable display panel. The touch display panel may include a display area AA. The display area AA may include a first display area AA 1 . The first display area AA 1  may be curved toward a direction away from the light exiting side of the touch display panel. The first display area AA 1  may include a third touch lead (not shown in  FIG.  20   ). Exemplarily, a structure of the third touch lead in the first display area AA 1  may refer to the structure of the third touch lead  400   c  shown in  FIG.  11   . In an area corresponding to the touch electrode  300  that is insulated from the third touch lead  400   c , since the first wiring portion  410  in the third touch lead  400   c  is partially located in the second metal layer  230 , the area of the second metal layer  230  for disposing the first wiring portion  410  may not be disposed with the first electrode line  310 . Accordingly, wirings in the first metal layer  210  corresponding to this area may be reduced, and thus the bending stress in this area may be reduced. In the first display area AA 1 , at least part of the touch leads may be third touch leads, and thus bending of the first display area AA 1  may be achieved. 
     It should be noted that,  FIG.  20    exemplarily shows that the touch display panel may include two first display areas AA 1 . In some other embodiments of the present disclosure, the touch display panel may include other numbers of first display areas AA 1 . 
     In one embodiment, the third touch lead  400   c  in the first display area AA 1  in the touch display panel may include the structure of the third touch lead  400   c  described in  FIG.  11   . In some other embodiments of the present disclosure, the third touch lead  400   c  in the first display area AA 1  may include other structures. 
     With continuous reference to  FIG.  1   , in some embodiments, the touch display panel may also include a plurality of sub-pixels P. The sub-pixels P may emit light to realize displaying function of the touch display panel. 
     In the touch electrode  300 , a plurality of first electrode lines  310  and a plurality of second electrode lines  320  intersect, defining a plurality of meshes. That is, the touch electrode  300  has a metal mesh structure. A vertical projection of at least one mesh on the substrate  100  surrounds a vertical projection of at least one sub-pixel P on the substrate  100 . That is, the vertical projection of at least one sub-pixel P on the substrate  100  is located in the vertical projection of a mesh in the touch electrode  300  on the substrate  100 . Accordingly, the first electrode lines  310  and the second electrode lines  320  in the touch electrode  300  may not block the light-emitting area of the sub-pixel P, and thus the display effect of the touch display panel may be improved. In addition, the meshes of the touch electrode  300  may be arranged corresponding to the sub-pixels P, and thus the mesh density of the touch electrode  300  may be increased. Accordingly, the touch sensitivity of the touch display panel may be improved. In one embodiment, the mesh may be a ring-shaped structure defined by intersection of metal electrode lines. 
     Along the direction perpendicular to the plane where the substrate  100  is located, the touch lead  400  may not overlap the sub-pixel P. Accordingly, shielding of the light-emitting area of the sub-pixel P by the touch lead  400  may be avoided, and thus the display effect of the touch display panel may be improved. 
       FIG.  21    illustrates a schematic top view of another touch display panel.  FIG.  22    illustrates an enlarged schematic diagram of part K in the touch display panel shown in  FIG.  21   . With reference to  FIGS.  21  and  22   , in some embodiments, the touch electrodes  300  may be arranged in an array along the first direction X and the second direction Y. 
     In the first direction X, a length of the gap q 3  between two adjacent touch electrodes  300  arranged along the first direction X is d1. It should be noted that, in the first direction X, the length of the gap q 3  between two adjacent touch electrodes  300  arranged along the first direction X refers to a minimum length of the gap q 3 , in the first direction X, between two adjacent touch electrodes  300  arranged along the first direction X. 
     In the first direction X, the length of the sub-pixel P located between two adjacent touch electrodes  300  arranged along the first direction X is d2. In the first direction X, a distance between two sub-pixels P adjacent to the sub-pixel P located between two adjacent touch electrodes  300  arranged along the first direction X is d3. It should be noted that, in one embodiment, the two adjacent touch electrodes  300  arranged along the first direction X are two adjacent touch electrodes  300  arranged along the first direction X based on a same position. Exemplarily, two adjacent touch electrodes  300  arranged along the first direction X are touch electrode  300   d  and touch electrode  300   e , respectively. The length of the gap between the touch electrode  300   d  and the touch electrode  300   e  in the first direction X is d1. The length of the sub-pixel P 1  between the touch electrode  300   d  and the touch electrode  300   e  in the first direction X is d2. In the first direction X, the distance between the two sub-pixels P 2  and P 3  adjacent to the sub-pixel P 1  is d3. 
     In existing technologies, the length of the gap between two adjacent touch electrodes is generally much smaller than the length of one sub-pixel. The small length of the gap between two adjacent touch electrodes may cause the risk of a short circuit between two adjacent touch electrodes. 
     In the present disclosure, the length of the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  in the first direction X is greater than or equal to the length of the sub-pixel P 1  in the first direction X, that is, d2≤d1. Since the gap between the touch electrode  300   d  and the touch electrode  300   e  is larger, the risk of a short circuit between the touch electrode  300   d  and the touch electrode  300   e  may be reduced. In addition, the length of the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  in the first direction X is less than or equal to the distance between the sub-pixel P 2  and the sub-pixel P 3 , that is, d1≤d3. Since the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  is not too large, the touch sensitivity of the touch display panel may not be affected. In the present disclosure, d2≤d1≤d3. Accordingly, the effect on the touch sensitivity of the touch display panel may be small, and meanwhile, the risk of a short circuit between the touch electrode  300   d  and the touch electrode  300   e  may be reduced. 
       FIG.  23    illustrates another enlarged schematic diagram of part K in a touch display panel shown in  FIG.  21   .  FIG.  24    illustrates a cross-sectional view along L-L′ direction of the touch display panel shown in  FIG.  23   . With reference to  FIGS.  23  and  24   , in some embodiments, the touch display panel may also include an array layer  10 . The array layer  10  is located between the substrate  100  and the touch layer  200 . The array layer  10  may include a third metal layer  500 . 
     In the first direction X, a plurality of first dummy lines  610  is disposed between two adjacent touch electrodes  300 . The first dummy line  610  extends along the first direction X. Along the direction perpendicular to the plane where the substrate  100  is located, each of two ends of the first dummy line  610  overlaps an adjacent touch electrode  300 , respectively. The first dummy line  610  does not overlap the sub-pixel P. The first dummy line  610  is also made of a metal material. The first dummy line  610  is disposed at the disconnection spacing between two adjacent touch electrodes  300  in the first direction X. Accordingly, a problem that the pattern of the touch electrode  300  may be visible due to the large spacing between two adjacent touch electrodes  300  in the first direction X may be alleviated. Optionally, in the first direction X, the first dummy line  610  may not be disposed in an area between two adjacent touch electrodes  300 , where the touch lead  400  is disposed. 
     The first dummy line  610  is located in the third metal layer  500  of the array layer  10 , and no additional metal layer is required to form the first dummy line  610 . Accordingly, the thickness of the touch display panel may be reduced, the manufacturing process may be simplified, and the production cost may be reduced. Optionally, the third metal layer  500  may be a gate metal layer. The third metal layer  500  may also be a source/drain metal layer, or other metal layers in the array layer  10 . 
       FIG.  25    illustrates a schematic top view of another touch display panel.  FIG.  26    illustrates an enlarged schematic diagram of part M in the touch display panel shown in  FIG.  25   . With reference to  FIGS.  25  and  26   , in some embodiments, the touch electrodes  300  may be arranged in an array along the first direction X and the second direction Y. 
     The touch lead  400  may include a first branch  420  and a second branch  430  connected to each other. The second branch  430  is connected between two adjacent first branches  420  along the first direction X. The second branch  430  is located in the gap q 3  between two adjacent touch electrodes  300  arranged along the first direction X. Optionally, along a direction perpendicular to the plane where the substrate  100  is located, the first branch  420  and the touch electrode  300  at least partially overlap. 
     The second branch  430  and the touch electrode  300  may be located on different metal layers. Along the direction perpendicular to the plane where the substrate  100  is located, the second branch  430  and the touch electrode  300  do not overlap. Accordingly, a short circuit between the second branch  430  and the touch electrode  300  may be avoided. 
     In existing technologies, a step may be formed in an area where the touch lead is disposed in the touch display panel. When the touch electrode is subsequently fabricated in the metal layer, a problem of etching residue may appear in this area. The part of the touch lead located in the gap between two adjacent touch electrodes arranged along the first direction extends along the first direction. When making the touch electrode, etching residues may appear at an area corresponding to the touch lead and in the gap between two adjacent touch electrodes arranged in the first direction. The first electrode line in the touch electrode also extends along the first direction. Thus, a short circuit between the first electrode lines corresponding to two adjacent touch electrodes arranged in the first direction may appear, thereby causing a short circuit between two adjacent touch electrodes arranged in the first direction. It should be noted that the first electrode lines corresponding to two adjacent touch electrodes arranged in the first direction refers to, in two adjacent touch electrodes arranged in the first direction, one first electrode line in one touch electrode and another first electrode line in the other touch electrode are adjacent in the first direction and arranged along the first direction. No other first electrode lines may be disposed between the two first electrode lines. 
     In one embodiment, the second branch  430  may include two first segments  431  connected to different first branches  420 , and a second segment  432  connected to the two first segments  431 . One end of the first segment  431  is connected to the second segment  432 , and the other end of the first segment  431  is connected to the first branch  420 . The second segment  432  extends in the first direction X, and the first segment  431  extends in the second direction Y. That is, the second branch  430  in the touch lead  400  is designed with a corner structure, such that the vertical projection of the second branch  430  on the substrate  100  at least partially surrounds the vertical projection of a sub-pixel P on the substrate  100 . In addition, along the direction perpendicular to the plane where the substrate  100  is located, the second branch  430  may not overlap the touch electrode  300 . Accordingly, when fabricating the touch electrode  300 , even etching residue may appear in an area in the metal layer corresponding to the second branch  430 , the risk of a short circuit between two adjacent touch electrodes  300  arranged in the first direction X may be reduced. 
       FIG.  27    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure.  FIG.  28    illustrates an enlarged schematic diagram of part N in the touch display panel shown in  FIG.  27   . With reference to  FIGS.  27  and  28   , in some embodiments of the present disclosure, the touch display panel may include a plurality of sub-pixel rows P 10  arranged in the first direction X. The sub-pixel row P 10  may include a plurality of sub-pixels P arranged in the second direction Y. 
     The sub-pixel row P 10  may include a first sub-pixel row P 11  and a second sub-pixel row P 12 . Along the first direction X, the first sub-pixel row P 11  and the second sub-pixel row P 12  are arranged at an interval. In the first direction X, one sub-pixel P in the first sub-pixel row P 11  may overlap two adjacent sub-pixels P in the second sub-pixel row P 12 . Along the direction perpendicular to the plane where the substrate  100  is located, the touch lead  400  and the sub-pixel P do not overlap. With this arrangement method of the sub-pixels P in the touch display panel, the touch lead  400  needs to include a plurality of corner structures. The vertical projection of the corner structures on the substrate  100  partially surrounds the vertical projection of the sub-pixels P on the substrate  100 . Correspondingly, the second branch  430  in the touch lead  400  also includes corner structures. The vertical projection of the second branch  430  on the substrate  100  partially surrounds the vertical projection of the sub-pixels P on the substrate  100 . 
     The second branch  430  in the touch lead  400  includes corner structures. The vertical projection of the second branch  430  on the substrate  100  partially surrounds the vertical projection of the sub-pixels P on the substrate  100 . In addition, along the direction perpendicular to the plane where the substrate  100  is located, the second branch  430  does not overlap the touch electrode  300 . Accordingly, when fabricating the touch electrodes  300 , even etching residue may appear in an area in the metal layer corresponding to the second branch  430 , the risk of a short circuit between two adjacent touch electrodes  300  arranged in the first direction X may be reduced. 
       FIG.  29    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure.  FIG.  30    illustrates an enlarged schematic diagram of part R in the touch display panel shown in  FIG.  29   . With reference to  FIGS.  29  and  30   , in some embodiments, the touch electrodes  300  are arranged in an array along a third direction Z 1  and a fourth direction Z 2 . The third direction Z 1  intersects the fourth direction Z 2 . The third direction Z 1  intersects each of the first direction X and the second direction Y. The fourth direction Z 2  intersects each of the first direction X and the second direction Y. Optionally, the third direction Z 1  is perpendicular to the fourth direction Z 2 . 
     The touch lead  400  may also include a second wiring portion  440  extending along the second direction Y. Along a direction perpendicular to the plane where the substrate  100  is located, the second wiring portion  440  and the second electrode line  320  at least partially overlap. Accordingly, shielding of light exited from the touch display panel by the second wiring portion  440  in the touch lead  400  may be reduced, and shielding of light exited from the touch display panel by the touch leads  400  in the touch display panel may be further reduced. Thus, influence on the display effect of the touch display panel may be reduced. In addition, since the touch lead  400  is made of metal, the touch lead  400  may have reflective characteristics. Along the direction perpendicular to the plane where the substrate  100  is located, the first wiring portion  410  and the first electrode line  310  at least partially overlap. Influence of the increase of the reflective area caused by disposing the touch lead  400  may be reduced. 
     With continuous reference to  FIGS.  29  and  30   , in some embodiments, the touch lead  400  may include a second branch  430 . The second branch  430  is located in the gap q 3  between two adjacent touch electrodes  300   d  and  300   e  arranged along the third direction Z 1 . The second branch  430  is located between the insulated touch electrode  300   d  and the touch electrode  300   e . At the disconnection spacing between the touch electrode  300   d  and the touch electrode  300   e , the second branch  430  extends along the first direction X. That is, the length of the second branch  430  in the first direction X is proportional to the length of the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  in the third direction Z 1 . 
     In the first direction X, the length of the second branch  430  is m1. In the first direction X, the length of the sub-pixel P 1  located between two adjacent touch electrodes  300   d  and  300   e  arranged along the third direction Z 1  is m2. In the first direction X, the distance between the two sub-pixels P 2  and P 3  adjacent to the sub-pixel P 1  located between the two adjacent touch electrodes  300   d  and  300   e  arranged along the third direction Z 1  is m3. 
     The length of the second branch  430  in the first direction X is greater than or equal to the length of the sub-pixel P 1  in the first direction X, that is, m2≤m1. That is, the second branch  430  has a longer length in the first direction X. The longer length of the second branch  430  in the first direction X means that the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  has a longer length in the third direction Z 1 . Accordingly, risk of a short circuit between the touch electrode  300   d  and the touch electrode  300   e  may be reduced. Meanwhile, the length of the second branch  430  in the first direction X is less than or equal to the distance between the sub-pixel P 2  and the sub-pixel P 3 , that is, m1≤m3. Thus, the length of the second branch  430  in the first direction X may not be too large, that is, the length of the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  in the third direction Z 1  may not be too large. As such, the influence on the touch sensitivity of the touch display panel may be reduced. In the present disclosure, m2≤m1≤m3. Accordingly, the risk of a short circuit between the touch electrode  300   d  and the touch electrode  300   e  may be reduced, and meanwhile, the influence on the touch sensitivity of the touch display panel may be reduced. 
       FIG.  31    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure.  FIG.  32    illustrates an enlarged schematic diagram of part S in the touch display panel shown in  FIG.  31   . With reference to  FIGS.  31  and  32   , in some embodiments, the touch lead  400  may include a second branch  430 . The second branch  430  is located in the gap q 3  between two adjacent touch electrodes  300   d  and  300   e  arranged along the third direction Z 1 . The second branch  43  is located between the insulated touch electrode  300   d  and the touch electrode  300   e . At the disconnection spacing between the touch electrode  300   d  and the touch electrode  300   e , the second branch  430  extends along the second direction Y. That is, the length of the second branch  430  in the second direction Y is proportional to the length of the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  in the third direction Z 1 . 
     In the second direction Y, the length of the second branch  430  is n1. In the second direction Y, the length of the sub-pixel P 1  located between two adjacent touch electrodes  300   d  and  300   e  arranged along the third direction Z 1  is n2. In the second direction Y, the distance between the two sub-pixels P 2  and P 3  adjacent to the sub-pixel P 1  located between the two adjacent touch electrodes  300   d  and  300   e  arranged along the third direction Z 1  is n3. 
     The length of the second branch  430  in the second direction Y is greater than or equal to the length of the sub-pixel P 1  in the second direction Y, that is, n2≤n1. That is, the second branch  430  has a longer length in the second direction Y. The longer length of the second branch  430  in the second direction Y means that the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  has a longer length in the third direction Z 1 . Accordingly, risk of a short circuit between the touch electrode  300   d  and the touch electrode  300   e  may be reduced. Meanwhile, the length of the second branch  430  in the second direction Y is less than or equal to the distance between the sub-pixel P 2  and the sub-pixel P 3 , that is, n1≤n3. Thus, the length of the second branch  430  in the second direction Y may not be too large. That is, the length of the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  in the third direction Z 1  may not be too large, and thus the influence on the touch sensitivity of the touch display panel may be reduced. In the present disclosure, n2≤n1≤n3. Accordingly, the risk of a short circuit between the touch electrode  300   d  and the touch electrode  300   e  may be reduced, and meanwhile, the influence on the touch sensitivity of the touch display panel may be reduced. 
       FIG.  33    illustrates a schematic top view of another touch display panel consistent with the disclosed embodiments of the present disclosure.  FIG.  34    illustrates an enlarged schematic diagram of part T in the touch display panel shown in  FIG.  33   . With reference to  FIGS.  33  and  34   , in some embodiments, the touch lead  400  may include a second branch  430 . The second branch  430  is located in a gap q 3  between two adjacent touch electrodes  300   d  and  300   e  arranged along the third direction Z 1 . The second branch  430  is located at the disconnection spacing between the touch electrode  300   d  and the touch electrode  300   e . The second branch  430  located at the disconnection spacing between the touch electrode  300   d  and the touch electrode  300   e  may include a third segment  431  and a fourth segment  432 . The third segment  431  extends along the first direction X, and the fourth segment  432  extends along the second direction Y. That is, the length of the third part  431  in the first direction X and the length of the fourth part  432  in the second direction Y are each proportional to the length of the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  in the third direction Z 1 . 
     In the first direction X, the third segment  431  has a length of H1. In the first direction X, the sub-pixel P 1  between two adjacent touch electrodes  300   d  and  300   e  arranged along the third direction Z 1  has a length of h1. In the first direction X, the distance between the two sub-pixels P 2  and P 3  adjacent to the sub-pixel P 1  located between the two adjacent touch electrodes  300   d  and  300   e  arranged along the third direction Z 1  is h2. 
     In the second direction Y, the fourth segment  432  has a length of H2. In the second direction Y, the sub-pixel P 1  located between two adjacent touch electrodes  300   d  and  300   e  arranged along the third direction Z 1  has a length of h3. In the second direction Y, the distance between the two sub-pixels P 2 ′ and P 3 ′ adjacent to the sub-pixel P 1  located between the two adjacent touch electrodes  300   d  and  300   e  arranged along the third direction Z 1  is h4. 
     The length of the third sub-section  431  in the first direction X is greater than or equal to half of the length of the sub-pixel P 1  in the first direction X, that is, (h1)/2≤H1. That is, the third segment  431  has a longer length in the first direction X. In addition, the length of the fourth segment  432  in the second direction Y is greater than or equal to half of the length of the sub-pixel P 1  in the second direction Y, that is, (h3)/2≤H2. That is, the fourth segment  432  has a longer length in the second direction Y is longer. The longer length of the third part  431  in the first direction X and the longer length of the fourth part  432  in the second direction Y mean that the length of the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  in the third direction Z 1  is larger. Accordingly, the risk of a short circuit between the touch electrode  300   d  and the touch electrode  300   e  may be reduced. In addition, the length of the third sub-section  431  in the first direction X is less than or equal to the distance between the sub-pixel P 2  and the sub-pixel P 3 , that is H1≤(h2)/2. Accordingly, the length of the third segment  431  in the first direction X may not be too large. Also, the length of the fourth sub-section  432  in the second direction Y is less than or equal to the distance between the sub-pixel P 2 ′ and the sub-pixel P 3 ′, that is, H2≤(h4)/2. Accordingly, the length of the fourth subsection  432  in the second direction Y may not be too large. As such, the third segment  431  may not be too long in the first direction X, and the fourth segment  432  may not be too long in the second direction Y. That is, the length of the gap q 3  between the touch electrode  300   d  and the touch electrode  300   e  in the third direction Z 1  may not be too large, and thus the influence on the touch sensitivity of the touch display panel may be reduced. In the present disclosure, (h1)/2≤H1≤(h2)/2, and (h3)/2≤H2≤(h4)/2. Accordingly, the risk of a short circuit between the touch electrode  300   d  and the touch electrode  300   e  may be reduced, and meanwhile, the influence on the touch sensitivity of the touch display panel may be reduced. 
       FIG.  35    illustrates another enlarged schematic diagram of part R in a touch display panel shown in  FIG.  29   .  FIG.  36    illustrates a cross-sectional view along U-U′ direction of the touch display panel shown in  FIG.  35   . With reference to  FIGS.  35  and  36   , in some embodiments, the touch display panel may also include an array layer  10 . The array layer  10  is located between the substrate  100  and the touch layer  20 . The array layer  10  may include a third metal layer  500 . 
     In the third direction Z 1 , a plurality of second dummy lines  620  is disposed between two adjacent touch electrodes  300   d  and  300   e . The second dummy line  620  may include a first dummy portion  621  extending in the first direction X and a second dummy portion  622  extending in the second direction Y. Along the direction perpendicular to the plane where the substrate  100  is located, each of two ends of the first dummy portion  621  overlaps an adjacent touch electrode  300 , respectively, and each of two ends of the second dummy portion  622  overlaps an adjacent touch electrode  300 , respectively. The second dummy line  620  does not overlap the sub-pixel P. The second dummy line  620  is made of a metal material. The second dummy line  620  is disposed at the disconnection spacing between two adjacent touch electrodes  300   d  and  300   e  in the third direction Z 1 . Accordingly, a problem of a visible pattern of the touch electrode  300  due to the large distance between two adjacent touch electrodes  300   d  and  300   e  in the third direction Z 1  may be addressed. Optionally, in the third direction Z 1 , the area where the touch lead  400  is arranged, between two adjacent touch electrodes  300   d  and  300   e , may not be disposed with the second dummy line  620 . 
     The second dummy line  620  is located in the third metal layer  500  of the array layer  10 . An additional metal layer may not be need for forming the second dummy line  620 . Accordingly, the thickness of the touch display panel may be reduced, the manufacturing process may be simplified, and the production cost may be reduced. Optionally, the third metal layer  500  may also be a source/drain metal layer, or other metal layers in the array layer  10 . 
     In one embodiment, a plurality of second dummy lines  620  is disposed between the touch electrode  300   d  and the touch electrode  300   e . In some other embodiments of the present disclosure, the second dummy line  620  may or may not be disposed between two adjacent touch electrodes  300  in the third direction Z 1  in other positions in the touch display panel. That is, the second dummy line  620  may be disposed at each spacing between any two adjacent touch electrodes  300  along the third direction Z 1  in the touch display panel, or the second dummy line  620  may be disposed at the spacings between any two adjacent touch electrodes  300  along the third direction Z 1  in part of the touch display panel. 
       FIG.  37    illustrates a schematic top view of a display device consistent with the disclosed embodiments of the present disclosure. With reference to  FIG.  37   , the present disclosure also provides a display device  0000 . The display device  0000  may include a touch display panel  1000  provided in the present disclosure.  FIG.  37    uses a mobile phone as an example to illustrate the display device  0000 . It may be understood that the display device  0000  provided in present disclosure may also be a computer, a television, a vehicle-mounted display device, and other display devices  0000  having a display function, and is not specifically limited in the present disclosure. The display device  0000  provided by the present disclosure may have beneficial effects of the touch display panel  1000  provided by the present disclosure. For details, reference may be made to specific descriptions of the touch display panel  1000  in the present disclosure, and details are not described herein again. 
     As disclosed, the technical solutions of the present disclosure have the following advantages. 
     The touch display panel provided by the present disclosure may include a plurality of touch electrodes and a plurality of touch leads. The touch electrode may include a first electrode line extending in a first direction and a second electrode line extending in a second direction. The first direction intersects the second direction. The touch electrode may be a grid structure formed by a plurality of first electrode lines and a plurality of second electrode lines. The touch lead may include a first wiring portion extending along the first direction. The first electrode line and the first wiring portion each extend along the first direction. The first electrode line is located on a second metal layer. The first wiring portion is at least partially located on a first metal layer. Along a direction perpendicular to a plane where the substrate is located, the first wiring portion and the first electrode line at least partially overlap. A part of the first wiring portion located in the first metal layer at least partially overlaps the first electrode line. Since along the direction perpendicular to the plane where the substrate is located, the first wiring portion and the first electrode line at least partially overlap, shielding of the light exited from the touch display panel by disposing the touch leads in the touch display panel may be reduced, and influence on the display effect of the touch display panel may be reduced. In addition, since the touch lead is made of metal, the touch lead may have reflective characteristics. Along the direction perpendicular to the plane where the substrate is located, the first wiring portion and the first electrode line at least partially overlap. A problem of a visible pattern of the touch lead caused by disposing the touch lead  400  in the touch display panel may be alleviated. 
     The embodiments disclosed herein are exemplary only and not limiting the scope of the present disclosure. Various combinations, alternations, modifications, equivalents, or improvements to the technical solutions of the disclosed embodiments can be obvious to those skilled in the art. Without departing from the spirit and scope of this disclosure, such combinations, alternations, modifications, equivalents, or improvements to the disclosed embodiments are encompassed within the scope of the present disclosure.