the present disclosure will be explained in details with reference to the embodiments and the accompanying drawings , whereby it can be fully understood how to solve the technical problem by the technical means according to the present disclosure and achieve the technical effects thereof , and thus the technical solution according to the present disclosure can be implemented . it should be noted that , as long as there is no structural conflict , all the technical features mentioned in all the embodiments may be combined together in any manner , and the technical solutions obtained in this manner all fall within the scope of the present disclosure . the embodiment of the present disclosure provides a touch panel 1 . as shown in fig2 , the touch panel 1 comprises a plurality of touch electrodes 2 that are arranged in an array and are insulated from one another and a driving circuit that is arranged at one end of the touch panel , wherein each touch electrode 2 is connected with the driving circuit through a corresponding first signal line 3 and is insulated from other first signal lines 3 so as to ensure the normal operation of the touch panel 1 . according to the embodiment of the present disclosure , in order to improve the extent of uniformity of the electric field that is generated by the first signal lines 3 on the touch panel 1 , each first signal line 3 , after being electrically connected with a corresponding touch electrode 2 , further extends to one end of the touch panel 1 far from the driving circuit , so that each touch electrode 2 overlaps with a group of first signal lines that are connected with the column of touch electrodes 2 including said touch electrode . in order to prevent the first signal line 3 from being electrically connected with a touch electrode 2 other than its corresponding touch electrode 2 , thereby affecting the normal operation of the touch panel 1 , the touch electrodes 2 and the first signal lines are arranged in different layers . an insulation layer 6 is arranged between the first signal lines 3 and the touch electrodes 2 , and the first signal lines 3 each are connected with a corresponding touch electrode 2 through a via hole 7 in the insulation layer 6 . therefore , according to the embodiments of the present disclosure , since each first signal line , after being electrically connected with a corresponding touch electrode 2 , further extends to one end of the touch panel far from the driving circuit , i . e ., each touch electrode 2 overlaps with a group of first signal lines 3 that are connected with the column of touch electrodes 2 including said touch electrode , with regard to any cross section of the touch panel along a direction perpendicular to the extending direction of the first signal lines , the first signal lines contained therein would have the same number and the same positions . in the touch panel 1 , the electric field generated by the first signal lines 3 is distributed in a relatively uniform manner , and the mura of the panel can be prevented . therefore , the display effect of the touch panel 1 can be improved , and thus the user experience can be guaranteed . further , in the touch panel 1 according to the embodiments of the present disclosure , the first signal lines 3 and the touch electrodes 2 can be connected with each other in various manners . the connection modes between the first signal lines 3 and the touch electrodes 2 will be specifically illustrated below with reference to several examples . however , the examples are not intended to restrict the scope of the present disclosure . it should be noted that , in the following examples , the touch panel 1 is provided with m rows × n columns of touch electrodes r xy ( r 11 ˜ r m1 ˜ r 1n ˜ r mn ) that are insulated from one another , and a driving circuit . each touch electrode r xy is connected with the driving circuit through one single first signal line l yx . specifically , each touch electrode r xy has a rectangular shape . the touch electrodes r xy and the first signal lines l yx are arranged in different layers and are made of indium tin oxide ( ito ) or other transparent conductive materials . each touch electrode r xy is connected with a corresponding first signal line l yx through a via hole 7 . according to the present embodiment , the number of the via hole 7 is three , and can be selected according to actual situations . in the foregoing , x = 1 , 2 , 3 , . . . , m , and y = 1 , 2 , 3 , . . . , n . as shown in fig2 , the driving circuit is located at a lower end with regard to the touch electrodes 2 that are arranged in an array . each column of touch electrodes comprises a first to an m th touch electrodes r 1y ˜ r my from bottom up , and a group of first signal lines that are connected with the column of touch electrodes r 1y ˜ r my comprise a first to an m th first signal lines l y1 ˜ l ym from left to right . the first , the second , . . . , the ( m − 1 ) th , and the m th ones of the first signal lines are electrically connected with the first , the second , . . . , the ( m − 1 ) th , and the m th ones of the touch electrodes in sequence . specifically , taking the first column of touch electrodes r 11 ˜ r m1 as an example , the first column of touch electrodes r 11 ˜ r m1 each are connected with the driving circuit through the first group of first signal lines l 11 ˜ l 1m in sequence . similarly , with respect to the n th column of touch electrodes r 1n ˜ r mn , the touch electrodes 2 thereof each are connected with the driving circuit through the first signal lines l n1 ˜ l nm in sequence . as shown in fig3 , the driving circuit is located at a lower end with regard to the touch electrodes that are arranged in an array . each column of touch electrodes comprises a first to an m th touch electrodes r 1y ˜ r my from bottom up , and a group of first signal lines that are connected with the column of touch electrodes r 1y ˜ r my comprise a first to an m th first signal lines l y1 ˜ l ym from left to right . the first , the second , . . . , the ( m − 1 ) th , and the m th ones of the first signal lines are electrically connected with the m th , the ( m − 1 ) th , . . . , the second , and the first ones of the touch electrodes in sequence . specifically , taking the first column of touch electrodes r 11 ˜ r m1 as an example , the first column of touch electrodes r 11 ˜ r m1 each are connected with the driving circuit through the first group of first signal lines l 1m ˜ l 11 in sequence . similarly , with respect to the n th column of touch electrodes r 1n ˜ r mn , the touch electrodes 2 thereof each are connected with the driving circuit through the first signal lines l nm ˜ l n1 in sequence . it is obvious that , example 2 is a simple variant of example 1 . as shown in fig4 , the driving circuit is located at a lower end with regard to the touch electrodes that are arranged in an array . each column of touch electrodes comprises a first to an m th touch electrodes r 1y ˜ r my from bottom up , and a group of first signal lines that are connected with the column of touch electrodes r 1y ˜ r my comprise a first to an m th first signal lines l y1 ˜ l ym from left to right . the first , the third , the fifth , . . . ones of the first signal lines are electrically connected with the first , the second , the third , . . . ones of the touch electrodes in sequence , and the second , the fourth , the sixth , . . . ones of the first signal lines are electrically connected with the m th , the ( m − 1 ) th , the ( m − 2 ) th , . . . ones of the touch electrodes in sequence . specifically , taking the first column of touch electrodes r 11 ˜ r m1 as an example , the first column of touch electrodes r 11 ˜ r m1 each are connected with the driving circuit through the first group of first signal lines l 11 ˜ l 1m . the group of first signal lines l 11 ˜ l 1m are divided into an odd - numbered group and an even - numbered group , wherein the odd - numbered group of first signal lines comprise odd - numbered first signal lines l 11 , l 13 , . . . , and the even - numbered group of first signal lines comprise even - numbered first signal lines l 12 , l 14 , . . . . the odd - numbered group of first signal lines l 11 , l 13 , . . . are connected with the touch electrodes r 11 , r 21 , . . . in sequence from the bottom end of the column of touch electrodes r 11 ˜ r m1 , while the even - numbered group of first signal lines l 12 , l 14 , . . . are connected with the touch electrodes r m1 , r ( m - 1 ) 1 , . . . in sequence from the top end of the column of touch electrodes r 11 ˜ r m1 . the last first signal line l 1m is connected with a touch electrode at a middle position of the column of touch electrodes r 11 ˜ r m1 . as shown in fig5 , the driving circuit is located at a lower end with regard to the touch electrodes that are arranged in an array . each column of touch electrodes comprises a first to an m th touch electrodes r 1y ˜ r my from bottom up , and a group of first signal lines that are connected with the column of touch electrodes r 1y ˜ r my comprise a first to an m th first signal lines l y1 ˜ l ym from left to right . the first , the third , the fifth , . . . ones of the first signal lines are electrically connected with the m th , the ( m − 1 ) th , the ( m − 2 ) th , . . . ones of the touch electrodes in sequence , and the second , the fourth , the sixth , . . . ones of the first signal lines are electrically connected with the first , the second , the third , . . . ones of the touch electrodes in sequence . specifically , taking the first column of touch electrodes r 11 ˜ r m1 as an example , the first column of touch electrodes r 11 ˜ r m1 each are connected with the driving circuit through the first group of first signal lines l 11 ˜ l 1m . the group of first signal lines l 11 ˜ l 1m are divided into an odd - numbered group and an even - numbered group , wherein the odd - numbered group of first signal lines comprise odd - numbered first signal lines l 11 , l 13 , . . . , and the even - numbered group of first signal lines comprise even - numbered first signal lines l 12 , l 14 , . . . . the odd - numbered group of first signal lines l 11 , l 13 , . . . are connected with the touch electrodes r m1 , r ( m - 1 ) 1 , . . . in sequence from the up end of the column of touch electrodes r 11 ˜ r m1 , while the even - numbered group of first signal lines l 12 , l 14 , . . . are connected with the touch electrodes r 11 , r 21 , . . . in sequence from the bottom end of the column of touch electrodes r 11 ˜ r m1 . the last first signal line l 1m is connected with a touch electrode at a middle position of the column of touch electrodes r 11 ˜ r m1 . it is obvious that , example 4 is a simple variant of example 3 . in addition to the aforesaid four examples , the touch electrodes 2 of each column of touch electrodes each can be connected with the first signal lines 3 corresponding to the column of touch electrodes in other manners . the distribution uniformity of the electric field of the touch panel 1 can be improved as long as it can be guaranteed that each touch electrode 2 is connected with only one of the first signal lines 3 , and thus the mura of the panel can be avoided . the areas that are provided with touch electrodes 2 are all provided with the first signal lines 3 . however , since the areas between two columns of touch electrodes are not provided with the first signal lines 3 , the density of the electric field formed by the first signal lines 3 in areas between two columns of touch electrodes is low , and thus the uniformity of the electric field on the whole touch panel 1 is not satisfactory . therefore , according to the embodiment of the present disclosure , as shown in fig6 , the touch panel 1 further comprises second signal lines 4 that are arranged between any two columns of touch electrodes , and each second signal line 4 is electrically connected with the driving circuit . since in the touch panel 1 , the touch electrodes 2 can not only realize the touch function , but also serve as the common electrodes during the display , the display or the touch of the touch panel is performed in a time - shared manner . when the display is performed by the touch panel 1 , the first signal lines 3 and the second signal lines 4 all receive a common electrode signal from the driving circuit . that is , during the display , the first signal lines 3 and the second signal lines 4 cooperate with each other so as to improve the uniformity of the electric field of the whole touch panel 1 . when the touch is performed by the touch panel , the first signal lines 3 provide touch signals to the touch electrodes 2 . when a finger of a user touches the touch panel 1 , part of the touch signals of the touch electrodes 2 at touch points would be taken away by the finger , and the charge of these touch electrodes 2 would be reduced . in this case , the driving circuit can easily determine the touch points when scanning the charge of the touch electrodes 2 . according to the embodiment of the present disclosure , in order to avoid the mutual interference of two adjacent columns of touch electrodes , thereby reducing the touch accuracy of the touch panel 1 during the touch procedure , the second signal lines 4 that are arranged between two columns of touch electrodes are connected with the ground through the driving circuit . during the touch procedure , the touch electrodes 2 and the ground can form capacitors so as to store charges . therefore , at this time , the electric potential of the touch electrodes 2 is a positive value , definitely not zero . as shown in fig7 , the electric field lines emitted by the touch electrodes 2 would fall on the adjacent second signal lines 4 which have a lower electric potential , so that the mutual interference of two adjacent columns of touch electrodes can be avoided . since the second signal lines 4 are arranged between two columns of touch electrodes , if the touch panel 1 is provided with n ( n being a positive integer larger than 1 ) columns of touch electrodes , the number of the second signal lines 4 is n − 1 . if each of the second signal lines 4 is electrically connected with the driving circuit , with respect to the touch panel 1 with each column of touch electrodes comprising m touch electrodes 2 , the driving circuit that is arranged on the touch panel 1 should be provided with ( m + 1 )× n − 1 output ends . in this case , the hardware requirement of the driving circuit is improved to a large extent , and thus the driving circuit has to be realized at a high cost . in order to reduce the number of the output ends of the driving circuit , according to the embodiment of the present disclosure , the touch panel 1 is further provided with third signal lines 5 that are connected with the driving circuit . the number of the third signal lines 5 is two . the third signal lines 5 extend from the driving circuit at both sides , and surround the area that is provided with the touch electrodes 2 ( i . e ., the active area of the touch panel 1 ). the two third signal lines 5 are connected with each other at one end of the touch panel far from the driving circuit . in this structure , the second signal lines 4 each are electrically connected with the driving circuit through the third signal lines 5 . at the same time , the second signal lines 4 do not need to be connected with the driving circuit directly , and are insulated from the driving circuit . therefore , the number of the output ends of the driving circuit can be reduced to a certain extent , and thus the driving circuit can be realized at a low cost . according to the embodiment of the present disclosure , in order to improve the structure compactness of the whole touch panel 1 and reduce the thickness of the touch panel 1 , the first signal lines 3 , the second signal lines 4 , and the third signal lines 5 can be arranged in a same layer and be formed through one patterning procedure . further , the embodiment of the present disclosure provides a display device , which comprises the aforesaid touch panel . the above embodiments are described only for better understanding , rather than restricting , the present disclosure . any person skilled in the art can make amendments to the implementing forms or details without departing from the spirit and scope of the present disclosure . the protection scope of the present disclosure shall be determined by the scope as defined in the claims .