Patent Publication Number: US-2023152920-A1

Title: Touch panel and manufacturing method therefor, and touch display apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a national phase entry under 35 USC 371 of International Patent Application No. PCT/CN2021/071732, filed on Jan. 14, 2021, which claims priority to Chinese Patent Application No. 202010053361.8, filed on, Jan. 17, 2020, which are incorporated herein by reference in their entirety. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to the field of touch display technologies, and in particular, to a touch panel and a manufacturing method therefor, and a touch display apparatus. 
     BACKGROUND 
     At present, touch display technologies are in a rapid development period, for example, a flexible and foldable touch display apparatus having a touch display function has received widespread attention. 
     SUMMARY 
     In an aspect, a touch panel is provided. The touch panel includes: a carrier panel, a plurality of touch electrodes, and a plurality of touch lines. The carrier panel has a bendable region and a non-bendable region. The plurality of touch electrodes and the plurality of touch lines are disposed on the carrier panel, and a touch electrode of the plurality of touch electrodes is electrically connected to one or more touch lines. A portion of at least one touch line located in the bendable region is a single-layer metal line, and at least a part of a portion of the at least one touch line located in the non-bendable region is a double-layer metal line. 
     In some embodiments, all of the portion of the at least one touch line located in the non-bendable region is a double-layer metal line. 
     In some embodiments, the non-bendable region includes at least one adjacent region proximate to the bendable region, and a non-adjacent region located at a side of the adjacent region away from the bendable region. A portion of the at least one touch line located in the adjacent region is a single-layer metal line, and a portion of the at least one touch line located in the non-adjacent region is the double-layer metal line. 
     In some embodiments, a dimension of the adjacent region in a first direction is less than a dimension of the non-adjacent region in the first direction. The first direction is parallel to a surface, provided with the plurality of touch electrodes and the plurality of touch lines thereon, of the carrier panel and perpendicular to a boundary of the bendable region proximate to the adjacent region. 
     In some embodiments, the plurality of touch electrodes include a plurality of first touch electrodes and a plurality of second touch electrodes, the plurality of first touch electrodes and the plurality of second touch electrodes are arranged crosswise and are insulated from each other. 
     In some embodiments, each first touch electrode of the plurality of first touch electrodes is a whole electrode. Each second touch electrode of the plurality of second touch electrodes includes a plurality of touch sub-electrodes and a plurality of connection portions, and two adjacent touch sub-electrodes in the second touch electrode are separated by a first touch electrode. The touch panel further includes a first insulating layer. The plurality of first touch electrodes and the plurality of touch sub-electrodes are disposed in a same layer, and the plurality of first touch electrodes and the plurality of connection portions are located on both sides of the first insulating layer. 
     In some embodiments, the first insulating layer has a plurality of first via holes, and the two adjacent touch sub-electrodes in the second touch electrode are electrically connected to a connection portion of the plurality of connection portions through at least two first via holes in the first insulating layer. 
     In some embodiments, the first touch electrodes and the touch sub-electrodes each have a metal mesh structure. 
     In some embodiments, the double-layer metal line includes a first metal line and a second metal line. The first metal line and the plurality of first touch electrodes are disposed in a same layer, and the second metal line and the plurality of connection portions are disposed in a same layer. And/or the single-layer metal line is disposed in a same layer as the plurality of first touch electrodes or the plurality of connection portions. 
     In some embodiments, the double-layer metal line includes the first metal line and the second metal line. The first metal line and the second metal line are located on the both sides of the first insulating layer. The first insulating layer further has one or more second via holes, and the first metal line and the second metal line are electrically connected through at least one second via hole in the first insulating layer. 
     In some embodiments, each first touch electrode of the plurality of first touch electrodes is a whole electrode, and each second touch electrode of the plurality of second touch electrodes is a whole electrode. The touch panel further includes a second insulating layer disposed between the plurality of first touch electrodes and the plurality of second touch electrodes. The double-layer metal line includes a first metal line and a second metal line. The first metal line and the plurality of first touch electrodes are disposed in a same layer, and the second metal line and the plurality of second touch electrodes are disposed in a same layer. The second insulating layer further has one or more third via holes, and the first metal line and the second metal line are electrically connected through at least one third via hole in the second insulating layer. And/or the single-layer metal line is disposed in a same layer as the plurality of first touch electrodes or the plurality of second touch electrodes. 
     In some embodiments, the plurality of touch electrodes are arranged in an array, and each touch line is connected to a touch electrode of the plurality of touch electrodes. The touch panel further includes a third insulating layer located on a side of the plurality of touch electrodes away from the carrier panel. The double-layer metal line includes a first metal line and a second metal line. The first metal line and the plurality of touch electrodes are disposed in a same layer, and the second metal line is disposed on a side of the third insulating layer away from the carrier panel. The third insulating layer has one or more fourth via holes, and the first metal line and the second metal line are electrically connected through at least one fourth via hole in the third insulating layer. And/or the single-layer metal line is disposed in a same layer as the plurality of touch electrodes or is located on the side of the third insulating layer away from the carrier panel. 
     In some embodiments, each touch line has a same length or an approximately same length. 
     In some embodiments, an orthogonal projection of the first metal line on the carrier panel approximately overlaps with an orthogonal projection of the second metal line on the carrier panel. 
     In some embodiments, the bendable region is located in a middle or an edge of the touch panel  100 . 
     In another aspect, a touch display apparatus is provided. The touch display apparatus includes the touch panel as described in any of the above embodiments. 
     In yet another aspect, a manufacturing method for a touch panel is provided. The manufacturing method includes: forming a plurality of touch electrodes and a plurality of touch lines on a carrier panel, and a touch electrode of the plurality of touch electrodes being electrically connected to one or more touch lines; wherein the carrier panel has a bendable region and a non-bendable region, a portion of at least one touch line located in the bendable region is a single-layer metal line, and at least a part of a portion of the at least one touch line located in the non-bendable region is a double-layer metal line. 
     In some embodiments, forming the plurality of touch electrodes and the plurality of touch lines on the carrier panel, includes: forming a first metal film; patterning the first metal film to form a first metal pattern layer, the first metal pattern layer including a plurality of first touch electrodes, a plurality of touch sub-electrodes and a plurality of first metal lines; wherein each first touch electrode of the plurality of first touch electrodes is a whole electrode, the plurality of touch sub-electrodes is arranged in an array, and two adjacent touch sub-electrodes are separated by a first touch electrode; forming a first insulating layer, the first insulating layer having a plurality of first via holes and one or more second via holes; forming a second metal film; and patterning the second metal film to form a second metal pattern layer, the second metal pattern layer including a plurality of connection portions and a plurality of second metal lines; wherein each connection portion of the plurality of connection portions electrically connects two adjacent touch sub-electrodes through at least two first via holes to form a second touch electrode, a connection portion and a first touch electrode have a cross region; a first metal line and a second metal line are electrically connected through at least one second via hole to form the double-layer metal line; and the first metal pattern layer or the second metal pattern layer further includes the single-layer metal line. 
     In some embodiments, forming the plurality of touch electrodes and the plurality of touch lines on the carrier panel, includes: forming a first metal film; patterning the first metal film to form a first metal pattern layer, the first metal pattern layer including a plurality of first touch electrodes and a plurality of first metal lines; wherein each first touch electrode of the plurality of first touch electrodes is a whole electrode; forming a second insulating layer, the second insulating layer having one or more third via holes; forming a second metal film; and patterning the second metal film to form a second metal pattern layer, the second metal pattern layer including a plurality of second touch electrodes and a plurality of second metal lines; wherein each second touch electrode of the plurality of second touch electrodes is a whole electrode; a connection portion and a first touch electrode have a cross region; a second metal line and a first metal line are electrically connected through at least one third via hole to form the double-layer metal line; and the first metal pattern layer or the second metal pattern layer further includes the single-layer metal line. 
     In some embodiments, forming the plurality of touch electrodes and the plurality of touch lines on the carrier panel, includes: forming a first metal film; patterning the first metal film to form a first metal pattern layer, the first metal pattern layer including a plurality of touch electrodes and a plurality of first metal lines; wherein the plurality of touch electrodes are arranged in an array; forming a third insulating layer, the third insulating layer having one or more fourth via holes; forming a second metal film; and patterning the second metal film to form a second metal pattern layer, the second metal pattern layer including a plurality of second metal lines; wherein a second metal line and a first metal line are electrically connected through at least one fourth via hole to form the double-layer metal line, and the first metal pattern layer or the second metal pattern layer further includes the single-layer metal line. 
     In some embodiments, the at least one touch line includes the plurality of touch lines; or the at least one touch line includes part of the plurality of touch lines, and each touch line of remaining part of the plurality of touch lines is all located in the non-bendable region, and is a double-layer metal line. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to describe technical solutions in the present disclosure more clearly, accompanying drawings to be used in some embodiments of the present disclosure will be introduced briefly below. Obviously, the accompanying drawings to be described below are merely accompanying drawings of some embodiments of the present disclosure, and a person of ordinary skill in the art may obtain other drawings according to these drawings. In addition, the accompanying drawings to be described below may be regarded as schematic diagrams, and are not limitations on actual sizes of products, an actual process of a method and actual timings of signals to which the embodiments of the present disclosure relate. 
         FIG.  1    is a structural diagram of a touch display apparatus, in accordance with some embodiments; 
         FIG.  2    is a structural diagram of another touch display apparatus, in accordance with some embodiments; 
         FIG.  3    is a schematic diagram showing a division of areas of a display panel, in accordance with some embodiments; 
         FIG.  4    is a structural diagram of a liquid crystal display panel, in accordance with some embodiments; 
         FIG.  5    is a structural diagram of an electroluminescent display panel, in accordance with some embodiments; 
         FIG.  6    is a structural diagram of a touch display panel, in accordance with some embodiments; 
         FIG.  7    is a structural diagram of another touch display panel, in accordance with some embodiments; 
         FIG.  8 A  is a sectional view taken along the line A-A′ in  FIG.  6    (or  FIG.  7   ); 
         FIG.  8 B  is a sectional view taken along the line H-H′ in  FIG.  6    (or  FIGS.  7   ); 
         FIG.  8 C  is a sectional view taken along the line H-H′ in  FIG.  6    (or  FIG.  7   ) in a case where a third insulating layer is provided; 
         FIG.  9 A  is a sectional view taken along the line B-B′ in  FIG.  6    (or  FIG.  7   ); 
         FIG.  9 B  is another sectional view taken along the line B-B′ in  FIG.  6    (or  FIG.  7   ); 
         FIG.  9 C  is a sectional view taken along the line B-B′ in  FIG.  6    (or  FIG.  7   ) in a case where a third insulating layer is provided; 
         FIG.  9 D  is another sectional view taken along the line B-B′ in  FIG.  6    (or  FIG.  7   ) in a case where a third insulating layer is provided; 
         FIG.  10    is a structural diagram of yet another touch display panel, in accordance with some embodiments; 
         FIG.  11 A  is a sectional view taken along the line C-C′ in  FIG.  10   ; 
         FIG.  11 B  is another sectional view taken along the line C-C′ in  FIG.  10   ; 
         FIG.  11 C  is a sectional view taken along the line C-C′ in  FIG.  10    in a case where a second insulating layer is provided; 
         FIG.  11 D  is another sectional view taken along the line C-C′ in  FIG.  10    in a case where a second insulating layer is provided; 
         FIG.  12    is a structural diagram of a touch display apparatus in which a bendable region is located in the middle, in accordance with some embodiments; 
         FIG.  13    is a structural diagram of a touch display apparatus in which bendable regions are located at edges, in accordance with some embodiments; 
         FIG.  14    is a structural diagram of yet another touch panel, in accordance with some embodiments; 
         FIG.  15    is a sectional view taken along the line D-D′ in  FIG.  14   ; 
         FIG.  16    is a partial enlargement view of the part F in  FIG.  14   ; 
         FIG.  17    is a partial enlargement view of the part N in  FIG.  14   ; 
         FIG.  18 A  is a sectional view taken along the line E-E′ in  FIG.  17   ; 
         FIG.  18 B  is a sectional view taken along the line I-I′ in  FIG.  17   ; 
         FIG.  19    is a partial enlargement view of the part M in  FIG.  14   ; 
         FIG.  20    is a sectional view taken along the line J-J′ in  FIG.  19   ; 
         FIG.  21 A  is a sectional view taken along the line G-G′ in  FIG.  14   ; 
         FIG.  21 B  is another sectional view taken along the line G-G′ in  FIG.  14   ; 
         FIG.  21 C  is yet another sectional view taken along the line G-G′ in  FIG.  14   ; 
         FIG.  22    is a flow diagram of a manufacturing method for a touch panel, in accordance with some embodiments; 
         FIG.  23    is a flow diagram of a manufacturing method for another touch panel, in accordance with some embodiments; 
         FIG.  24    is a flow diagram of a manufacturing method for yet another touch panel, in accordance with some embodiments; and 
         FIG.  25    is a flow diagram of a manufacturing method for yet another touch panel, in accordance with some embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     Technical solutions in some embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are merely some but not all embodiments of the present disclosure. All other embodiments obtained based on the embodiments of the present disclosure by a person of ordinary skill in the art shall be included in the protection scope of the present disclosure. 
     Unless the context requires otherwise, throughout the description and the claims, the term “comprise” and other forms thereof such as the third-person singular form “comprises” and the present participle form “comprising” are construed as an open and inclusive meaning, i.e., “including, but not limited to.” In the description of the specification, the terms such as “one embodiment”, “some embodiments”, “exemplary embodiments”, “example”, “specific example” or “some examples” are intended to indicate that specific features, structures, materials or characteristics related to the embodiment(s) or example(s) are included in at least one embodiment or example of the present disclosure. Schematic representations of the above terms do not necessarily refer to the same embodiment(s) or example(s). In addition, the specific features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any suitable manner. 
     Below, the terms “first” and “second” are only used for descriptive purposes, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined with “first” or “second” may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, the term “a plurality of/the plurality of” means two or more unless otherwise specified. 
     In the description of some embodiments, the term “connected” and its extensions may be used. For example, the term “connected” may be used in the description of some embodiments to indicate that two or more components are in direct physical contact or electrical contact with each other. The embodiments disclosed herein are not necessarily limited to the contents herein. 
     The phrase “A and/or B” includes the following three combinations: only A, only B, and a combination of A and B. 
     The use of the phrase “applicable to” or “configured to” herein means an open and inclusive language, which does not exclude devices that are applicable to or configured to perform additional tasks or steps. 
     In addition, the use of the phase “based on” means openness and inclusiveness, since a process, step, calculation or other action that is “based on” one or more of the stated conditions or values may, in practice, be based on additional conditions or values exceeding those stated. 
     The term “approximately” as used herein includes a stated value and an average value within an acceptable range of deviation of a particular value. The acceptable range of deviation is determined by a person of ordinary skill in the art in view of the measurement in question and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). 
     Exemplary embodiments are described herein with reference to sectional views and/or plan views as idealized exemplary drawings. In the accompanying drawings, thickness of layers and regions are enlarged for clarity. Therefore, variations in shape with respect to the drawings due to, for example, manufacturing technologies and/or tolerances may be envisaged. Therefore, the exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but including shape deviations due to, for example, manufacturing. For example, an etched region shown in a rectangular shape generally has a curved feature. Therefore, the regions shown in the accompanying drawings are schematic in nature, and their shapes are not intended to show actual shapes of the region in a device, and are not intended to limit the scope of the exemplary embodiments. 
     Referring to  FIGS.  1  and  2   , some embodiments of the present disclosure provide a touch display apparatus  200 , a type of which is not limited. The touch display apparatus  200  may be a liquid crystal touch display (LCD) apparatus, or may be an electroluminescent touch display apparatus. In a case where the touch display apparatus  200  is the electroluminescent touch display apparatus, the electroluminescent touch display apparatus may be an organic light-emitting diode (OLED) touch display apparatus or a quantum dot light-emitting diode (QLED) touch display apparatus. 
     The touch display apparatus  200  may be any product or component having a touch function and a display function such as a display, a television, a digital camera, a mobile phone, a tablet computer or a digital photo frame. 
     As shown in  FIGS.  1  and  2   , the touch display apparatus  200  may include a housing  1 , a cover plate  2 , a display panel  3 , a circuit board  4 , a touch layer  5  and the like. In a case where the touch display apparatus  200  is the liquid crystal touch display apparatus, the touch display apparatus  200  further includes a backlight assembly. The backlight assembly is not shown in  FIGS.  1  and  2   . 
     A longitudinal section of the housing  1  is U-shaped. The display panel  3 , the circuit board  4  and other accessories are all arranged in the housing  1 . The circuit board  4  is disposed below the display panel  3 . The cover plate  2  is disposed on a side of the display panel  3  away from the circuit board  4 . In the case where the touch display apparatus  200  is the liquid crystal touch display apparatus, and the touch display apparatus includes the backlight assembly, the backlight assembly is disposed between the display panel  3  and the circuit board  4 . 
     In some embodiments, the touch layer  5  is disposed on a light exit surface of the display panel  3 , which is shown in  FIG.  1   . In this case, the touch layer  5  and the display panel  3  together constitute a touch panel  100 . In some other embodiments, the touch layer  5  is disposed on a surface of the cover plate  2  proximate to the display panel  3 , which is shown in  FIG.  2   . In this case, the touch layer  5  and the cover plate  2  together constitute a touch panel  100 . 
     As shown in  FIG.  3   , the display panel  3  has a display area A 1  and a peripheral area A 2  located on at least one side of the display area A 1 .  FIG.  3    illustrates an example in which the display area A 1  is surrounded by the peripheral area A 2 . The display area A 1  is provided with a plurality of sub-pixels P therein. The peripheral area A 2  may be used for wiring, and furthermore, a gate driver circuit may be disposed in the peripheral area A 2 . 
     In the case where the touch display apparatus  200  is the liquid crystal touch display apparatus, the display panel  3  is a liquid crystal display panel. As shown in  FIG.  4   , a main structure of the liquid crystal display panel  3 A includes an array substrate  31 , an opposite substrate  32  and a liquid crystal layer  33  disposed between the array substrate  31  and the opposite substrate  32 . 
     Each sub-pixel of the array substrate  31  includes a thin film transistor  311  and a pixel electrode  312  that are located on a first base  310 . The thin film transistor  311  includes an active layer, a source, a drain, a gate, and a portion of a gate insulating layer between the gate and the active layer. The source and the drain are in contact with the active layer. The pixel electrode  312  is electrically connected to the drain of the thin film transistor  311 . In some embodiments, the array substrate  31  further includes a common electrode  313  disposed on the first base  310 . The pixel electrode  312  and the common electrode  313  may be disposed in a same layer. In this case, the pixel electrode  312  and the common electrode  313  are each a comb-tooth structure including a plurality of strip-shaped sub-electrodes. Alternatively, the pixel electrode  312  and the common electrode  313  may be disposed in different layers. In this case, as shown in  FIG.  4   , a first interlayer insulating layer  314  is provided between the pixel electrode  312  and the common electrode  313 . In a case where the common electrode  313  is disposed between the thin film transistor  311  and the pixel electrode  312 , as shown in  FIG.  4   , a second interlayer insulating layer  315  is provided between the common electrode  313  and the thin film transistor  311 . In some other embodiments, the array substrate  31  does not include the common electrode  313 . In this case, the common electrode  313  may be located in the opposite substrate  32 . 
     As shown in  FIG.  4   , the array substrate  31  further includes a planarization layer  316  disposed on a side of the thin film transistor  311  and the pixel electrode  312  away from the first base  310 . 
     As shown in  FIG.  4   , the opposite substrate  32  includes a color filter layer  321  disposed on a second base  320 . In this case, the opposite substrate  32  may also be referred to as a color filter (CF) substrate. The color filter layer  321  includes at least red photoresist units, green photoresist units and blue photoresist units, and the red photoresist units, the green photoresist units and the blue photoresist units are directly opposite to the sub-pixels in the array substrate  31  in a one-to-one correspondence. The opposite substrate  32  further includes a black matrix pattern  322  disposed on the second base  320 , and the black matrix pattern  322  is used for separating the red photoresist units, the green photoresist units, and the blue photoresist units. 
     As shown in  FIG.  4   , the liquid crystal display panel further includes an upper polarizer  34  disposed on a side of the opposite substrate  32  away from the liquid crystal layer  33 , and a lower polarizer  35  disposed on a side of the array substrate  31  away from the liquid crystal layer  33 . 
     In the case where the touch display apparatus  200  is the electroluminescent touch display apparatus, the display panel  3  is an electroluminescent display panel. As shown in  FIG.  5   , the electroluminescent display panel  3 B may include a display substrate  36  and an encapsulation layer  37  for encapsulating the display substrate  36 . 
     Herein, the encapsulation layer  37  may be an encapsulation film or an encapsulation substrate. 
     As shown in  FIG.  5   , each sub-pixel in the display substrate  36  includes a light-emitting device and a pixel driving circuit that are disposed on a third base  360 . The pixel driving circuit includes a plurality of thin film transistors  311 . The light-emitting device includes an anode  361 , a light-emitting functional layer  362  and a cathode  363 . The anode  361  is electrically connected to a drain of a thin film transistor  311  that serves as a driving transistor among the plurality of thin film transistors  311 . The display substrate  36  further includes a pixel defining layer  364 . The pixel defining layer  364  includes a plurality of opening regions, and a light-emitting device is disposed in an opening region. In some embodiments, the light-emitting functional layer  362  includes a light-emitting layer. In some other embodiments, in addition to the light-emitting layer, the light-emitting functional layer  362  further includes one or more of an electron transport layer (ETL), an electron injection layer (EIL), a hole transport layer (HTL) and a hole injection layer (HIL). 
     As shown in  FIG.  5   , the display substrate  36  further includes a planarization layer  365  disposed between the driving circuit and the anode  361 . 
     Some embodiments of the present disclosure provide a touch panel  100 , which may be applied to the above touch display apparatus  200 . As shown in  FIGS.  6 ,  7  and  10   , the touch panel  100  includes a carrier panel  10 , a plurality of touch electrodes  11 , and a plurality of touch lines  12 . The carrier panel  10  has a bendable region A 3  and a non-bendable region A 4 . The plurality of touch lines  12  and the plurality of touch electrodes  11  are all arranged on the carrier panel  10 , and a touch electrode  11  is electrically connected to one or more touch lines  12  (for example, a touch electrode  11  may be electrically connected to one touch line  12 ; for another example, a touch electrode  11  may be electrically connected to two or more touch lines connected in parallel). A portion of at least one touch line  12  located in the bendable region A 3  is a single-layer metal line, and at least a part of a portion of the at least one touch line  12  located in the non-bendable region A 4  is a double-layer metal line. 
     It will be noted that, the term “the plurality of touch electrodes” refers to two or more touch electrodes; similarly, the term “the plurality of touch lines” refers to two or more touch lines. 
     Herein, the touch layer  5  includes the plurality of touch electrodes  11  and the plurality of touch lines  12 . In a case where the touch layer  5  and the display panel  3  together constitute the touch panel  100 , as shown in  FIG.  1   , the display panel  3  is the carrier panel  10 , that is, the plurality of touch electrodes  11  and the plurality of touch lines  12  are arranged on the light exit surface of the display panel  3 . In a case where the touch layer  5  and the cover plate  2  together constitute the touch panel  100 , as shown in  FIG.  2   , the cover plate  2  is the carrier panel  10 , that is, the plurality of touch electrodes  11  and the plurality of touch lines  12  are arranged on the surface of the cover plate  2  proximate to the display panel  3 . 
     In addition, in the case where the plurality of touch electrodes  11  and the plurality of touch lines  12  are arranged on the light exit surface of the display panel  3 , or are arranged on the surface of the cover plate  2  proximate to the display panel  2 , other film layers are further provided around the plurality of touch electrodes  11  and the plurality of touch lines  12 . These film layers may include, for example, a protective layer to prevent the plurality of touch electrodes  11  and the plurality of touch lines  12  from being corroded by external environment, or a film layer in the display panel  3  proximate to the plurality of touch electrodes  11  and the plurality of touch lines  12 . 
     It will be noted that, the touch panel  100  may have a touch area and a wiring area. Based on this, the touch area corresponds to the display area A 1 , and the wiring area corresponds to the peripheral area A 2 . In some embodiments, as shown in  FIGS.  6  and  7   , the plurality of touch electrodes  11  are located in the touch area (e.g., an area inside the dotted box shown in  FIGS.  6  and  7   ). The plurality of touch lines  12  may be located in the touch area, and may also be located in the wiring area (e.g., an area outside the dotted box shown in  FIGS.  6  and  7   ). In some other embodiments, as shown in  FIG.  10   , the plurality of touch electrodes  11  are only located in the touch area (e.g., an area inside the dotted box shown in  FIG.  10   ), and the plurality of touch lines  12  are only located in the wiring area (e.g., an area outside the dotted box shown in  FIG.  10   ). 
     In some embodiments, the bendable region A 3  is located in the middle or an edge of the touch panel  100 . It will be noted that, the “middle” may be understood as any region except for edges of the touch panel  100 , and is not limited to a middle position of the touch panel  100  in a certain direction. 
     In some embodiments, as shown in  FIGS.  6  and  7   , the bendable region A 3  is located in the middle of the touch panel  100 .  FIG.  8 A  is a sectional view taken along the line A-A′ in  FIG.  6    (or  FIG.  7   ),  FIG.  8 B  is a sectional view taken along the line H-H′ in  FIG.  6    (or  FIG.  7   ), and  FIG.  8 C  is a sectional view taken along the line A-A′ in  FIG.  6    (or  FIG.  7   ) in a case where a third insulating layer is provided. Portions of the plurality of touch lines  12  located in the bendable region A 3  are single-layer metal lines, and a structure of the single-layer metal lines may be shown in  FIG.  8 A . Portions of the plurality of touch lines  12  located in the non-bendable region A 4  are double-layer metal lines, and a structure of the double-layer metal lines may be shown in  FIGS.  8 B and  8 C . In the structure shown in  FIG.  8 B , metal lines in two layers are in direct contact to form a structure of a double-layer metal line. However, in the structure shown in  FIG.  8 C , metal lines in two layers are electrically connected together through a fourth via hole  144  in the third insulating layer  133  between the two layers of the metal lines to form a structure of a double-layer metal line. For example, orthogonal projections of the metal lines of the double-layer metal line on the carrier panel  10  substantially overlap. 
     Based on this,  FIG.  9 A  is a sectional view taken along the line B-B′ in  FIG.  6    (or  FIG.  7   ), and  FIG.  9 B  is another sectional view taken along the line B-B′ in  FIG.  6    (or  FIG.  7   ).  FIG.  9 B  shows a transition portion TP between a single-layer metal line of each of the plurality of touch lines  12  located in the bendable region A 3  and double-layer metal lines thereof located in the non-bendable regions A 4 . In addition, referring to  FIG.  9 A , the single-layer metal line of each of the plurality of touch lines  12  located in the bendable region A 3  may be disposed in a same layer as a lower metal line of the double-layer metal line of the touch line  12  located in the non-bendable region A 4 . Referring to  FIG.  9 B , the single-layer metal line of each of the plurality of touch lines  12  located in the bendable region A 3  may be disposed in a same layer as an upper metal line of the double-layer metal line of the touch line  12  located in the non-bendable region A 4 . 
     Furthermore, in the non-bendable region A 4 , referring to  FIGS.  9 A and  9 B , metal lines in two layers may in direct contact to form a structure of a double-layer metal line. Alternatively, referring to  FIGS.  9 C and  9 D , in the case where the third insulating layer  133  is provided, the metal lines in the two layers may be electrically connected through a fourth via hole  144  in the third insulating layer  133 , between the two layers of the metal lines, to form a structure of a double-layer metal line. In addition, in the case where the third insulating layer  133  is provided, for a location arrangement of a layer where the single-layer metal line located in the bendable region A 3  is located, relative to the double-layer metal line in the non-bendable region A 4 , in  FIGS.  9 C and  9 D , reference may be made to the description of  FIGS.  9 A and  9 B , and details will not be repeated herein. 
     In some other embodiments, as shown in  FIG.  10   , the bendable region A 3  is located at an edge of the touch panel  100 .  FIG.  8 A  may also be regarded as sectional views taken along the line A-A′ in  FIG.  10   . Portions of the plurality of touch lines  12  located in the bendable region A 3  are single-layer metal lines, and the structure of the single-layer metal line is shown in  FIG.  8 A . Portions of the plurality of touch lines  12  located in the non-bendable region A 4  are double-layer metal lines, and the structure of the double-layer metal line is shown in  FIG.  8 B . Based on this,  FIG.  11 A  is a sectional view taken along the line C-C′ in  FIG.  10   , and  FIG.  11 B  is another sectional view taken along the line C-C′ in  FIG.  10   .  FIG.  11 A  shows a transition portion TP between the single-layer metal line of each of the plurality of touch lines  12  located in the bendable region A 3  and the double-layer metal line thereof located in the non-bendable region A 4 . In addition, referring to  FIG.  11 A , the single-layer metal line of each of the plurality of touch lines  12  located in the bendable region A 3  may be disposed in a same layer as an upper metal line of the double-layer metal line of the touch line  12  located in the io non-bendable region A 4 . Referring to  FIG.  11 B , the single-layer metal line of each of the plurality of touch lines  12  located in the bendable region A 3  may be disposed in a same layer as a lower metal line of the double-layer metal line of the touch line  12  located in the non-bendable region A 4 . 
     Furthermore, in the non-bendable region A 4 , referring to  FIGS.  11 A and  11 B , metal lines in two layers may in direct contact to form a structure of a double-layer metal line. Alternatively, referring to  FIGS.  11 C and  11 D , in the case where a second insulating layer  132  is provided, the metal lines in the two layers may be electrically connected through third via holes  143  in the second insulating layer  132  between the two layers of the metal lines to form a structure of a double-layer metal line. In addition, in the case where the second insulating layer  132  is provided, for a location arrangement of a layer where the single-layer metal line located in the bendable region A 3  is located, relative to the double-layer metal line in the non-bendable region A 4 , in  FIGS.  11 C and  11 D , reference may be made to the description of  FIG.  11 A  and  FIG.  11 B , and details will not be repeated herein. 
     It will be noted that, the “upper” and “lower” in the embodiments of the present disclosure are only descriptions with reference to an orientation of the corresponding drawings (e.g.,  FIGS.  9 A,  9 B,  11 A, and  11 B ), and are not used as a limitation. 
     It will be noted that in the examples of  FIGS.  6  and  7   , an insulating layer (e.g., the third insulating layer  133 ) may further be provided between the touch electrodes  11  and the touch lines  12 . In this case, a touch line  12  may be electrically connected to a touch electrode  11  through via holes in the insulating layer. 
     When the above touch panel  100  is applied to some actual scenes, in some examples, as shown in  FIG.  12   , the bendable region A 3  is located in the middle of the touch panel  100 . In this case, referring to  FIGS.  6  and  7   , it may be seen that, portions of the plurality of touch lines  12  in the bendable region A 3  are also located in the touch area. In this case, in the touch lines  12  located in the middle of the touch panel  100 , portions of touch lines  12  located in the bendable region A 3  are single-layer metal lines, and at least a portion of at least some of touch lines  12  located in the non-bendable region A 4  are double-layer metal lines. In this case, referring to  FIG.  12   , the non-bendable region A 4  includes a partial region proximate to the bendable region A 3 , which is an adjacent region A 41  in the non-bendable region A 4 , and the remaining region in the non-bendable region A 4  is a non-adjacent region A 42 . Portions of touch lines  12  in the adjacent region A 41  may be the same as the portions of the touch lines  12  in the bendable region A 3 , each of which is a single-layer metal line. In this case, portions of touch lines  12  in the non-adjacent region A 42  are double-layer metal lines. In some other examples, the portions of the touch lines  12  in the adjacent region A 41  may be the same as the portions of the touch lines  12  in the non-adjacent region A 42 , each of which is a double metal line. In this case, the portions of the touch lines  12  in the bendable region A 3  are still the single-layer metal lines. 
     In some other examples, as shown in  FIG.  13   , the bendable region A 3  is located at edges of the touch panel  100 , referring to  FIG.  10   , it may be seen that, portions of touch lines  12  in the bendable region A 3  are also located in the wiring area. In this case, in the touch lines  12  located at the edges of the touch panel  100 , portions of touch lines  12  located in the bendable region A 3  are single-layer metal lines, and at least a portion of at least some touch lines  12  located in the non-bendable region A 4  are double-layer metal lines. In this case, referring to  FIG.  13   , the non-bendable region A 4  includes a partial region proximate to the bendable region A 3 , which is an adjacent region A 41  in the non-bendable region A 4 , and the remaining region in the non-bendable region A 4  is a non-adjacent region A 42 . Portions of touch lines  12  in the adjacent region A 41  may be the same as the portions of the touch lines  12  in the bendable region A 3 , each of which is a single-layer metal line. In this case, portions of touch lines  12  in the non-adjacent region A 42  are double-layer metal lines. Alternatively, the portions of the touch lines  12  in the adjacent region A 41  may be the same as the portions of the touch lines  12  in the non-adjacent region A 42 , each of which is a double-layer metal line. In this case, the portions of the touch lines  12  in the bendable region A 3  are still single-layer metal lines. 
     Herein, the at least a part of the portions of the plurality of touch lines  12  located in the bendable region A 4  are double-layer metal lines. That is, a part of the portions of the plurality of touch lines  12  located in the non-bendable region A 4  may be double-layer metal lines, or all of the portions of the plurality of touch lines  12  located in the non-bendable region A 4  may be double-layer metal lines. 
     It will be noted that, the above non-bendable region A 4  may be provided at one side of the bendable region A 3 , or may be provided at two sides of the bendable region A 3 . In a case where non-bendable regions A 4  are provided at two sides of the bendable region A 3 , the two non-bendable regions A 4  may each include the adjacent region A 41  and the non-adjacent region A 42 , or one non-bendable region A 4  may include the adjacent region A 41  and the non-adjacent region A 42 , and the other non-bendable region A 4  may only include the adjacent region A 41 . 
     A touch panel provided by the related art includes a carrier panel, a plurality of touch electrodes, and a plurality of touch lines. The carrier panel has a bendable region and a non-bendable region. The touch electrodes and the touch lines are arranged on the carrier panel and are electrically connected to each other. Portions of the plurality of touch lines located in the bendable region and the non-bendable region are all double-layer metal lines. Since the portions of the plurality of touch lines located in the bendable region and the non-bendable region of the plurality touch lines in the touch panel provided by the related art are all the double-layer metal lines, and a thickness of the double-layer metal lines is large, a film layer around the touch lines is uneven. Therefore, when the touch panel is bent, cracks are easily generated in the film layer around the touch lines in the bendable region. 
     Based on this, some embodiments of the present disclosure provide a touch panel  100 . The touch panel  100  includes a carrier panel  10 , a plurality of touch electrodes  11 , and a plurality of touch lines  12 . The carrier panel  10  has a bendable region A 3  and a non-bendable region A 4 . The plurality of touch lines  12  and the plurality of touch electrodes  11  are all arranged on the carrier panel  10 , and a touch electrode  11  is electrically connected to one or more touch lines  12 . A portion of at least one touch line  12  located in the bendable region A 3  is a single-layer metal line, and at least a part of a portion of the at least one touch line  12  located in the non-bendable region A 4  is a double-layer metal line. Since in the touch panel  100  provided by some embodiments of the present disclosure, portion(s) of the plurality of touch lines  12  located in the bendable region A 3  are single-layer metal line(s), and a thickness of the single-layer metal line(s) is small, it may not cause an uneven thickness of a film layer around the single-layer metal line(s). Therefore, when the touch panel  100  is bent, the film layer around the bendable region A 3  is smooth, thereby reducing a risk of cracks in the film layer in the bendable region A 3 . Based on this, since at least a part of portion(s) of the plurality of touch lines  12  located in the non-bendable region A 4  is a double-layer metal line, and two metal lines in the double-layer metal line are connected in parallel, a sectional area of a touch line  12  is increased. Therefore, the double-layer metal line in the non-bendable region A 4  may reduce the impedance of the touch line  12 . 
     For example, as shown in  FIGS.  12  and  13   , a dimension (length) of adjacent regions A 41  in a first direction X is less than a dimension (length) of a non-adjacent region A 42  in the first direction X. The first direction is parallel to a surface S, provided with the plurality of touch electrodes and the plurality of touch lines thereon, of the carrier panel  10  and perpendicular to boundary(s) of the bendable region(s) A 3  proximate to the adjacent regions A 41 . In this way, an area of the non-adjacent region A 42  may be increased, which is helpful for increasing a length of the double-layer metal line in the non-bendable region A 4  and reducing the impedance of the touch line  12 . Furthermore, by providing portion(s) of touch line(s) in the adjacent regions A 41  proximate to the bendable region A 3  as single-layer metal lines, it is also possible to reduce the risk that a film layer in the bendable region A 3  is easily cracked due to that the film layer in the bendable region A 3  is not uniform with a film layer around the bendable region A 3 . As a result, it is helpful for further improving the stability and reliability of the touch panel  100  during bending and use. 
     For some other examples, all portions of the plurality of touch lines  12  located in the non-bendable region A 4  are all double-layer metal lines. Since all the portions of the plurality of touch lines  12  located in the non-bendable region A 4  are the double-layer metal lines, the impedance of the touch lines  12  may be further reduced while the risk of cracks of the film layer around the single-layer metal lines in the bendable region A 3  is reduced. 
     In some embodiments, as shown in  FIGS.  6  and  7   , the plurality of touch electrodes  11  are arranged in an array, and each touch line  12  is electrically connected to a touch electrode  11 . 
     In the plurality of touch electrodes  11  arranged in an array, as shown in  FIG.  6   , each touch line  12  is connected to a touch electrode  11  and extends to be electrically connected to a driver circuit. Alternatively, as shown in  FIG.  7   , each touch line  12  is connected to a touch electrode  11 , and extends to be electrically connected to a driver circuit from an end of the touch area of the touch panel  100  away from the driver circuit. It may be understood that, in this case, the length of each touch line  12  is equal or approximately equal, and each touch line  12  is connected to only one touch electrode  11 . In the plurality of touch electrodes  11  arranged in the array, an original capacitance will exist between each touch electrode  11  and a ground terminal (GND). When a conductor (e.g., a finger) touches a region of the touch panel  100  where the touch electrode  11  is located, the original capacitance in the region will be changed, and a position of a touch point may be obtained by detecting the change of the capacitance. Since the length of each touch line  12  is approximately equal, original capacitances existed between the touch electrodes  11  connected to the touch lines  12  and the ground may be uniform in magnitude, which helps to make the touch sensitivity of positions of the touch panel  100  uniform. 
     In some other examples, as shown in  FIGS.  10  and  14   , the plurality of touch electrodes  11  include a plurality of first touch electrodes  111  and a plurality of second touch electrodes  112 . The plurality of first touch electrodes  111  and the plurality of second touch electrodes  112  are arranged crosswise and are insulated from each other. 
     A shape and number of the first touch electrodes  111 , and a shape and number of the second touch electrodes  112  are not limited. A corresponding shape of each first touch electrode  111 , a corresponding shape of each second touch electrode  112 , a io corresponding number of the first touch electrodes  111  and a corresponding number of the second touch electrodes  112  may be selected according to actual needs, as long as a position of a touch point may be determined by detecting a capacitance. 
     For example, as shown in  FIG.  10   , the first touch electrodes  111  and the second touch electrodes  112  are each strip-shaped. In this case, there are cross regions between the first touch electrodes  111  and the second touch electrodes  112 , that is, there is a certain overlapping area between orthogonal projections of the first touch electrodes  111  on the carrier panel and orthogonal projections of the second touch electrodes on the carrier panel. The first touch electrodes  111  and the second touch electrodes  112  are insulated from each other. For example, the second insulating layer  132  (e.g., the second insulating layer  132  shown in  FIGS.  11 C and  11 D ) may be provided between the first touch electrodes  111  and the second touch electrodes  112 , and the first touch electrodes  111  are insulated from the second touch electrodes  112  by the second insulating layer  132 . Therefore, an original capacitance will exist in a region where a first touch electrode  111  crosses a second touch electrode. In a case where a conductor (e.g., a finger) touches the cross region, the original capacitance in the region will be changed, and a position of a touch point may be obtained by detecting the change of the capacitance. 
     In some embodiments, as shown in  FIG.  14   , the first touch electrode  111  is a whole electrode, and the second touch electrode  112  includes a plurality of touch sub-electrodes  112   a  separated by the plurality of first touch electrodes  111  and a plurality of connection portion  112   b . The touch panel  100  further includes a first insulating layer  131 , and the first insulating layer  131  has a plurality of first via holes  141 . The first touch electrodes  111  and the touch sub-electrodes  112   a  are arranged in a same layer, and the first touch electrodes  111  and the connection portions  112   b  are located on both sides of the first insulating layer  131 . 
     Referring to  FIG.  5   , the first touch electrodes  111  and the touch sub-electrodes  112   a  are arranged on a light exit side of the display substrate  36 . In this case, the connection portions  112   b  may be arranged on a side of the first touch electrodes  111  proximate to or away from the display substrate  36 . In a case where the connection portions  112   b  are provided on the side of the first touch electrodes  111  proximate to the display substrate  36 , the first insulating layer  131  is provided between the connection portions  112   b  and all of the first touch electrodes  111  and the touch sub-electrodes  112   a . Based on this, referring to  FIG.  5   , the display panel  3  may further include a protective layer  39  for protecting the first touch electrodes  111  and the touch sub-electrodes  112   a . 
     In order to prevent the encapsulation layer  37  from being damaged and scratched when the touch electrodes  11  are formed, in some embodiments, as shown in  FIG.  5   , the display panel  3  further includes a buffer layer  38  disposed on the encapsulation layer  37 . 
     Herein, the first touch electrodes  111  may be touch transmitting electrodes (Tx), and the second touch electrodes  112  may be touch receiving electrodes (Rx). Alternately, the first touch electrodes  111  may be receiving electrodes (Rx), and the second touch electrodes  112  may be transmitting electrodes (Tx). The embodiments of the present disclosure do not limit thereto. 
     Based on this, in a case where the first touch electrodes  111  are touch transmitting electrodes (Tx) and the second touch electrodes  112  are touch receiving electrodes (Rx), as shown in  FIG.  14   , a touch transmitting electrode (Tx) is a whole electrode, and a touch receiving electrode (Rx) includes a plurality of touch sub-electrodes  112   a  and a plurality of connection portions  112   b . Two adjacent touch sub-electrodes  112   a  of the touch receiving electrode (Rx) are separated by a touch transmitting electrode (Tx). In a case where the first touch electrodes  111  are touch receiving electrodes (Rx) and the second touch electrodes  112  are touch transmitting electrodes (Tx), as shown in  FIG.  14   , a touch receiving electrodes (Rx) is a whole electrode, and a touch transmitting electrode (Tx) includes a plurality of touch sub-electrodes  112   a  and a plurality of connection portions  112   b . Two adjacent touch sub-electrodes  112   a  of the touch transmitting electrode (Tx) are separated by a touch receiving electrode (Rx). 
     It will be noted that, each first touch electrode  111  being of an integrated structure means that respective portions of the first touch electrode  111  are located in a same layer and are directly connected together. 
     In addition, “same layer” refers to a layer structure formed by a same patterning process by using a same mask in which a film layer for forming specific patterns is formed by using a same film-forming process. Depending on different specific patterns, the same patterning process may include exposure, development and etching, and the specific patterns formed in the layer structure may be continuous or discontinuous, and these specific patterns may also be at different heights or have different thicknesses. 
     In some embodiments of the present disclosure, referring to  FIG.  14   , since each first touch electrode  21  is a whole electrode, and all of the touch sub-electrodes  112   a  and all of the first touch electrodes  21  are located in the same layer, two adjacent touch sub-electrodes  112   a , separated by a first touch electrode  111 , in each second touch electrode  112  are connected by a connection portion  112   b  through first via holes  141  in the first insulating layer  131 . That is, each connection portion  112   b  and a first touch io electrode  21  are arranged crosswise, so as to achieve an electrical connection among respective touch sub-electrodes  112   a  in each second touch electrode  112 . 
     In some embodiments, as shown in  FIG.  15    ( FIG.  15    being a sectional view taken along the line D-D′ in  FIG.  14   ), two adjacent touch sub-electrodes  112   a  in the second touch electrodes  112  are electrically connected to the connection portion  112   b  through at least two first via holes  141  in the first insulating layer  131 . 
     Since the two adjacent touch sub-electrodes  112   a  separated by the first touch electrode  111  are connected by the at least two first via holes  141  in the first insulating layer  131 , there is a cross region between the first touch electrode  111  and the connection portion  112   b . Moreover, since the first touch electrode  111  and the connection portion  112   b  are insulated from each other, an original capacitance exist in the region where the first touch electrode  111  crosses the connection portion  112   b . When the cross region is touched by a conductor (e.g., a finger), the original capacitance in the region may be changed, and a position of a touch point may be obtained by detecting the change of the capacitance. 
     Herein, the first touch electrodes  111  and the touch sub-electrodes  112   a  are arranged in the same layer, and the first touch electrodes  111  and the connection portions  112   b  are located on both sides of the first insulating layer  131 . It may be that the first touch electrodes  111  and the touch sub-electrodes  112   a  are disposed on a side of the first insulating layer  131  proximate to the carrier panel  10 , and the connection portions  112   b  are disposed on a side of the first insulating layer  131  away from the carrier panel  10 ; alternatively, it may be that the first touch electrodes  111  and the touch sub-electrodes  112   a  are disposed on the side of the first insulating layer  131  away from the carrier panel  10 , and the connection portions  112   b  are disposed on the side of the first insulating layer  131  proximate to the carrier panel  10 . The embodiments of the present disclosure are not limited thereto. 
     An arrangement of the first insulating layer  131  is not limited. The first insulating layer  131  may be provided as a whole layer, or there may be a plurality of first insulating layers  131 . In a case where there are the plurality of first insulating layers  131 , the first insulating layers  131  are only provided in the regions where the first touch electrodes  111  cross the connection portions  112   b . In a case where the first insulating layer  131  is the whole layer, for example, orthogonal projections of the first touch electrodes  111  and the touch sub-electrodes  112   a  on the first insulating layer  131  are within a boundary of the first insulating layer  131 , and the first insulating layer  131  is only provided in the touch area of the touch panel  100 . 
     In some embodiments, at least a portion of the at least one touch electrode  11  has a metal mesh structure. 
     For example, as shown in  FIGS.  14  and  16   , the first touch electrodes  111  and the touch sub-electrodes  112   a  each have a metal mesh structure. 
     Herein,  FIG.  16    is a partial enlargement view of the region F in  FIG.  14   ; 
     In a case where the first touch electrodes  111  and the touch sub-electrodes  112   a  each have the metal mesh structure, a metal material of the metal mesh is not limited. The metal material may be simple metal or metal alloy, for example, the metal material may be one of silver (Ag), copper (Cu), aluminum (Al), or aluminum niobium alloy (AlNb). Alternatively, the metal material may be a metal layer in which a plurality of (at least two) metal sub-layers are stacked. For example, the metal layer includes three metal sub-layers, a material of a metal sub-layer in the middle is Al, and a material of metal sub-layers located on opposite sides of the middle layer is titanium (Ti), and this structure may be denoted as Ti/Al/Ti. In the case where the portion of the touch line  12  located in the bendable region A 3  is the single-layer metal line, the single-layer metal line may include a plurality of metal sub-layers, and has the Ti/Al/Ti structure. For example, the single-layer metal line may be arranged in the same layer as the first touch electrodes  111  and the touch sub-electrodes  112   a , alternatively may be arranged in the same layer as the connection portions  112   b . In the case where the portion of the touch line located in the non-bendable region A 4  is the double-layer metal line, one layer of the double-layer metal line may be arranged in the same layer as the first touch electrodes  111  and the touch sub-electrodes  112   a , and has the Ti/Al/Ti structure, and the other layer may be arranged in the same layer as the connection portions  112   b , and also has the Ti/Al/Ti structure. 
     In the example, the first touch electrodes  111  and the touch sub-electrodes  112   a  each have the metal mesh structure, so that a light transmittance of the entire touch panel  100  may be good; and in addition, since a conductivity of the metal material is generally low, compared with a transparent conductive material such as indium tin oxide (ITO), an overall conductivity of each first touch electrode  111  and each second touch electrode  112  made of the metal material is good. 
     It will be understood that, since the first touch electrodes  111  and the touch sub-electrodes  112   a  are arranged in the same layer, referring to  FIGS.  14  and  16   , a first touch electrode  111  and a touch sub-electrode  112   a  adjacent thereto are disconnected. 
     In addition, shapes of the first touch electrodes  111  and the touch sub-electrodes  112   a  having the metal mesh structure are not limited. For example, as shown in  FIG.  14   , in each first touch electrode  111 , except for portions at two ends, a shape of remaining portions of the first touch electrode  111  is composed of a plurality of rhombuses, and ends of two rhombuses that are adjacent to each other are directly connected together; 
     in each second touch electrode  112 , except for touch sub-electrodes  112   a  at two ends, the remaining touch sub-electrodes  112   a  each have a rhombus shape. 
     It will be noted that, the portions of each first touch electrode  111  at the two ends are two ends of the first touch electrode  111  in an extending direction thereof, and are located at edges of the touch area. Similarly, the touch sub-electrodes  112   a  at the two ends are two ends of the second touch electrode  112  in an extending direction thereof, and are located at edges of the touch area. 
     Based on this, since the shape of the remaining portions of the first touch electrode  111  except for the portions at the two ends is composed of the plurality of rhombuses that are directly connected, and the remaining touch sub-electrodes  112   a  each have the rhombus shape except for the touch sub-electrodes  112   a  at the two ends, shapes of the portions of the first touch electrode  111  at the two ends and the touch sub-electrodes  112   a  at the two ends may be set to isosceles triangles, and bottom sides of the isosceles triangles face edges of the touch area of the touch panel  100 , so that the edges of the touch area  20  are also provided with the first touch electrode  111  and touch sub-electrodes  112   a . In this way, it may be ensured that there is no touch blind region at the edges of the touch area  20 . 
     In the case where the portions of the touch lines  12  located in the non-bendable region A 4  are the double-layer metal lines, as shown in  FIG.  17    ( FIG.  17    being a partial enlargement view of the part N in  FIG.  14   ), a double-layer metal line includes a first metal line  121  and a second metal line  122 . In some embodiments, first metal lines  121  are disposed in the same layer as the first touch electrodes  111  and the touch sub-electrodes  112   a , and second metal lines  122  are disposed in the same layer as the connection portions  112   b.    
     Base on this, for example, as shown in  FIG.  17   , an orthogonal projection of the first metal line  121  on the carrier panel  10  approximately overlaps with an orthogonal projection of the second metal line  122  on the carrier panel  10 . 
     In the case where the portions of the touch lines  12  located in the bendable region A 3  are the single-layer metal lines, as shown in  FIG.  19    ( FIG.  19    being a partial enlargement view of the part M in  FIG.  14   ), a single-layer metal line may be disposed in the same layer as the first metal line  121  or the second metal line  122 .  FIG.  19    is illustrated by taking an example in which single-layer metal lines have the same structure as second metal lines  122 . Based on this, the single-layer metal lines may be disposed in the same layer as the first touch electrodes  111  and the touch sub-electrodes  112   a , alternatively may be disposed in the same layer as the connection portions  112   b . Referring to  FIG.  20    ( FIG.  20    being a sectional view taken along the line J-J′ in  FIG.  19   ), the single-layer metal lines and the connection portions are disposed in the same layer, that is, the single-layer metal lines are disposed on the side of the first insulating layer  131  away from the carrier panel  10 . 
     In some embodiments, the orthogonal projections of the first touch electrodes  111  and the touch sub-electrodes  112   a  on the first insulating layer  131  are within the boundary of the first insulating layer  131 , and the first insulating layer  131  may further provided in the wiring area of the touch panel  100 . In this case, as shown in  FIG.  18 A  ( FIG.  18 A  being a sectional view taken along the line E-E′ in  FIG.  17   ), the first metal lines  121  and the second metal lines  122  are located on both sides of the first insulating layer  131 . The first insulating layer  131  has second via holes, and a first metal line  121  and a second metal line  122  are electrically connected through a second via hole  142  in the first insulating layer  131 . As shown in  FIG.  18 B  ( FIG.  18 B  is a sectional view taken along the line II&#39; in  FIG.  17   ), the first metal lines  121  and the second metal lines  122  are located on the both sides of a portion of the first insulating layer  131  that is not provided with via holes. 
       FIGS.  21 A and  21 B  are sectional views taken along the line G-G′ in  FIG.  14   . In the case where the first insulating layer  131  is further provided in the wiring area of the touch panel  100 ,  FIG.  21 A  illustrates a transition portion TP between the single-layer metal line of a touch line located in the bendable region A 3  and the double-layer metal line thereof located in the non-bendable region A 4 . In addition, referring to  FIG.  21 A , of each touch line  12  of the plurality of touch lines  12 , the single-layer metal line located in the bendable region A 3  and the second metal line  122  of the double-layer metal line located in the non-bendable region A 4  are disposed in the same layer, and the single-layer metal line is connected to the second metal line  122  to form an integrated structure. Referring to  FIG.  21 B , of each touch line  12  of the plurality of touch lines  12 , the single-layer metal line located in the bendable region A 3  and the first metal line  121  of the double-layer metal line located in the non-bendable region A 4  are disposed in the same layer, and the single-layer metal line is connected to the first metal line  121  to form an integrated structure. 
     In some other embodiments, referring to  FIG.  14   , the orthogonal projections of the first touch electrodes  111  and the touch sub-electrodes  112   a  on the first insulating layer  131  are within the boundary of the first insulating layer  131 , and the first insulating layer  131  is only provided in the touch area of the touch panel  100 . In this case, as shown in  FIG.  21 C  ( FIG.  21 C  being a sectional view taken along the line G-G′ in  FIG.  14    in the case where the first insulating layer  131  is not disposed in the wiring area of the touch panel  100 ), the first metal line  121  and the second metal line  122  of the touch line  12  located in the wiring area are directly attached together, that is, there is no first insulating layer  131  between the first metal line  121  and the second metal line  122 . 
     Some embodiments of the present disclosure provide a manufacturing method for a touch panel  100 , which is used to manufacture the above touch panel  100 . 
     As shown in  FIG.  22   , the manufacturing method for the touch panel  100  includes following steps. 
     In S 10 , a plurality of touch electrodes  11  and a plurality of touch lines  12  are formed on a carrier panel  10 , and a touch electrode  11  of the plurality of touch electrodes is electrically connected to one or more touch lines  12 . 
     The carrier panel  10  has a bendable region A 3  and a non-bendable region A 4 . A portion of at least one touch line  12  located in the bendable region A 3  is a single-layer metal line, and at least a part of a portion of the at least one touch line  12  located in the non-bendable region A 4  is a double-layer metal line. 
     It will be understood that, at least a portion of at least one touch electrode  11  of the plurality of touch electrodes  11  formed may be provided with a metal mesh structure. 
     In some embodiments of the present disclosure, the manufacturing method for the touch panel  100  has the same structure and beneficial effects as the above touch panel  100 , and details may be referred to the above embodiments, which will not be repeated herein. 
     In some embodiments, referring to  FIGS.  14  and  23   , the S 10  includes following steps. 
     In S 100 , a first metal film is formed, and the first metal film is patterned to form a first metal pattern layer. The first metal pattern layer includes a plurality of first touch electrodes  111 , a plurality of touch sub-electrodes  112   a , and a plurality of first metal lines  121 . A first touch electrode  111  is a whole electrode, and the plurality of touch sub-electrodes  112   a  are arranged in an array. 
     Herein, patterning the first metal film means that masking, exposing, developing, and etching the first metal film. 
     It will be understood that, the plurality of first touch electrodes  111 , the plurality of touch sub-electrodes  112   a , and the plurality of first metal lines  121  are disposed in a same layer. 
     In S 101 , a first insulating layer  131  is formed. The first insulating layer  131  is provided with first via holes  141  and second via hole(s)  142 . 
     In S 102 , a second metal film is formed, and the second metal film is patterned to form a second metal pattern layer. The second metal pattern layer includes a plurality of connection portions  112   b  and a plurality of second metal lines  122 . Each connection portion  112   b  of the plurality of connection portions  112   b  electrically connects two adjacent touch sub-electrodes  112   a  through at least two first via holes  141  to form a second touch electrode, and a connection portion  112   b  and a first touch electrode  111  have a cross region. A first metal line  121  and a second metal line  122  are electrically connected through at least one second via hole  142  to form the double-layer metal line. The first metal pattern layer or the second metal pattern layer further includes the single-layer metal line. 
     Herein, patterning the second metal film means that masking, exposing, developing, and etching the second metal film. 
     In addition, the first via holes  141  are used to electrically connect the connection portion  112   b  and the two adjacent touch sub-electrodes  112   a , and the second via hole  142  is used to electrically connect the first metal line  121  and the second metal line  122 . 
     It will be understood that, the connection portions  112   b  and the second metal lines  122  are disposed in a same layer. 
     It will be noted that, in the case where portions of the plurality of touch lines  12  located in the bendable region A 3  are the single-layer metal lines, the formed first metal pattern layer or the second metal pattern layer includes the single-layer metal lines. 
     In addition, a sequence of forming the first touch electrodes  111 , the touch sub-electrodes  112   a  and the first metal lines  121  and forming the connection portions  112   b  and the second metal lines  122  is not limited. It may be that the first metal film may be patterned first to form the first touch electrodes  111 , the touch sub-electrodes  112   a  and the first metal lines  121 , and then the second metal film may be patterned to form the connection portions  112   b  and the second metal lines  122 . Alternatively, it may be that the second metal film may be patterned first to form the connection portions  112   b  and the second metal lines  122 , and then the first metal film is patterned to form the first touch electrodes  111 , touch sub-electrodes  112   a  and the first metal lines  121 . The embodiments of the present disclosure do not limit thereto. 
     It will be understood that, the first touch electrodes  111 , the touch sub-electrodes  112   a , the connection portions  112   b , the first metal lines  121  and the second metal lines  122  in some embodiments of the present disclosure have the same technical features and beneficial effects as the above embodiments, and details may be referred to the above embodiments, which will not be repeated herein. 
     In some embodiments, referring to  FIGS.  10  and  24   , the S 10  includes following steps. 
     In S 200 , a first metal film is formed, and the first metal film is patterned to form a first metal pattern layer. The first metal pattern layer includes a plurality of first touch electrodes  111  and a plurality of first metal lines  121 . Each first touch electrode  111  of the plurality of first touch electrodes  111  is a whole electrode. 
     In S 201 , a second insulating layer  132  is formed. The second insulating layer  132  has one or more third via holes  143 . 
     In S 202 , a second metal film is formed, and the second metal film is patterned to form a second metal pattern layer. The second metal pattern layer includes a plurality of second touch electrodes  112  and a plurality of second metal lines  122 . Each second touch electrode  112  of the plurality of second touch electrodes  112  is a whole electrode. A second touch electrode  112  and a first touch electrode  111  have a cross region. A second metal line  122  and a first metal line  121  are electrically connected through at least one third via hole  143  to form the double-layer metal line. The first metal pattern layer or the second metal pattern layer further includes the single-layer metal line. 
     It will be noted that, in the case where portions of the plurality of touch lines  12  located in the bendable region A 3  are the single-layer metal lines, the formed first metal pattern layer or the second metal pattern layer includes the single-layer metal lines. 
     In addition, a sequence of forming the first touch electrodes  111  and the first metal lines  121  and forming the second touch electrodes  112  and the second metal lines  122  is not limited. The sequence of the formations is not described herein. 
     In some embodiments, referring to  FIGS.  6 ,  7  and  25   , the S 10  includes following steps. 
     In S 300 , a first metal film is formed, and the first metal film is patterned to form a first metal pattern layer. The first metal pattern layer includes a plurality of touch electrodes  11  and a plurality of first metal lines  121 . The plurality of touch electrodes  11  are arranged in an array. 
     In S 301 , a third insulating layer  133  is formed. The third insulating layer  133  has one or more fourth via holes  144 . 
     In S 302 , a second metal film is formed, and the second metal film is patterned to form a second metal pattern layer. The second metal pattern layer includes a plurality of second metal lines  122 . A second metal line  122  and a first metal line  121  are electrically connected through at least one fourth via hole  144  to form the double-layer metal line. The first metal pattern layer or the second metal pattern layer further includes the single-layer metal line. 
     It will be noted that, in the case where portions of the plurality of touch lines  12  located in the bendable region A 3  are the single-layer metal lines, the formed first metal pattern layer or the second metal pattern layer includes the single-layer metal lines. 
     In addition, a sequence of forming the touch electrodes  11  and the first metal lines  121  and forming the second metal lines  122  is not limited. The sequence of the formations is not described herein. For example, the first metal lines  121  may be formed after the second metal pattern layer is formed, in this case, an insulating layer needs to be provided among different layers, a first metal line  121  and a second metal line  122  are connected in parallel through via hole(s) in the insulating layer, and the second metal line  122  and a touch electrode  11  are electrically connected through via hole(s). 
     The foregoing descriptions are merely specific implementations of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or replacements that a person skilled in the art could conceive of within the technical scope of the present disclosure shall be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.