Patent Publication Number: US-2020278773-A1

Title: Touch substrate and display device

Description:
FIELD OF INVENTION 
     The present disclosure relates to a field of display technology, and more particularly to a touch substrate and a display device. 
     BACKGROUND 
     Currently, all out-cell touch substrates, used for a flexible active matrix organic light emitting diode (AMOLED) display screen, are of a film type, where touch sensors are generally made of transparent conductive metal oxide, i.e., indium tin oxide (ITO). The out-cell touch substrates are disposed on the flexible AMOLED display screen, and an ITO electrode pattern is formed by photolithography and etching techniques. The photolithography and etching techniques are used to remove a portion of the ITO conductive material in some regions, so as to form touch driving electrodes and touch sensing electrodes that are electrically independent from each other. 
     Patterns of conventional touch electrodes, regardless of either mutual-capacitive touch sensors or self-capacitive touch sensors, all have a regular shape, e.g., a square shape, a diamond shape, etc. 
     However, because of difference of optical properties, such as light reflectance between etched regions and non-etched regions, the formed ITO electrode pattern is visually noticeable. This affects entire visual effects displayed by the display screens. 
     SUMMARY OF DISCLOSURE 
     The present disclosure provides a touch substrate and a display device, which lowers the likelihood that the electrode patterns are visually noticeable. 
     The present disclosure provides a touch substrate, comprising: a first driving electrode pattern, a second driving electrode pattern, a first sensing electrode pattern, a second sensing electrode pattern, a first insulation trench, a second insulation trench, a third insulation trench, and a fourth insulation trench; 
     wherein the first sensing electrode pattern and the second sensing electrode pattern are connected to each other via a connection portion, and the first driving electrode pattern and the second driving electrode pattern are disposed at two sides of the connection portion: 
     wherein the first insulation trench is connected to the second insulation trench, such that the first driving electrode pattern is separated from the first sensing electrode pattern and the second sensing electrode pattern; 
     wherein the third insulation trench is connected to the fourth insulation trench, such that the second driving electrode pattern is separated from the first sensing electrode pattern and the second sensing electrode pattern; 
     wherein the first insulation trench comprises a plurality of trenches having a first slope and a plurality of trenches having a second slope; 
     wherein the second insulation trench comprises a plurality of trenches having a third slope and a plurality of trenches having a fourth slope; 
     wherein the third insulation trench comprises a plurality of trenches having a fifth slope and a plurality of trenches having a sixth slope; 
     wherein the fourth insulation trench comprises a plurality of trenches having a seventh slope and a plurality of trenches having an eighth slope. 
     In the touch substrate provided by one embodiment of the present disclosure, 
     the trenches having the first slope and the trenches having the second slope are connected to each other alternately; 
     the trenches having the third slope and the trenches having the fourth slope are connected to each other alternately; 
     the trenches having the fifth slope and the trenches having the sixth slope are connected to each other alternately; 
     the trenches having the seventh slope and the trenches having the eighth slope are connected to each other alternately. 
     In the touch substrate provided by one embodiment of the present disclosure, 
     the first insulation trench is symmetrical to the second insulation trench with respect to a Y-axis: 
     the third insulation trench is symmetrical to the fourth insulation trench with respect to the Y-axis. 
     In the touch substrate provided by one embodiment of the present disclosure, 
     the first driving electrode pattern comprises a first sub-driving electrode pattern and a second sub-driving electrode pattern; 
     the first sub-driving electrode pattern comprises a plurality of first driving electrode lines and a plurality of second driving electrode lines; 
     each of the first driving electrode lines comprises a plurality of electrode lines having the first slope and a plurality of electrode lines having the second slope, and the electrode lines having the first slope and the electrode lines having the second slope are connected to each other alternately; 
     each of the second driving electrode lines comprises a plurality of electrode lines having the third slope and a plurality of electrode lines having the fourth slope, and the electrode lines having the third slope and the electrode lines having the fourth slope are connected to each other alternately; 
     the first driving electrode lines and the second driving electrode lines cross each other; 
     the second sub-driving electrode pattern and the first sub-driving electrode pattern are axisymmetrical to each other. 
     In the touch substrate provided by one embodiment of the present disclosure, 
     the second driving electrode pattern comprises a third sub-driving electrode pattern and a fourth sub-driving electrode pattern: 
     the third sub-driving electrode pattern comprises a plurality of third driving electrode lines and a plurality of fourth driving electrode lines; 
     each of the third driving electrode lines comprises a plurality of electrode lines having the fifth slope and a plurality of electrode lines having the sixth slope, and the electrode lines having the fifth slope and the electrode lines having the sixth slope are connected to each other alternately; 
     each of the fourth driving electrode lines comprises a plurality of electrode lines having the seventh slope and a plurality of electrode lines having the eighth slope, and the electrode lines having the seventh slope and the electrode lines having the eighth slope are connected to each other alternately; 
     the third driving electrode lines and the fourth driving electrode lines cross each other: 
     the fourth sub-driving electrode pattern and the third sub-driving electrode pattern are axisymmetrical to each other. 
     In the touch substrate provided by one embodiment of the present disclosure, 
     the first sensing electrode pattern comprises a first sub-sensing electrode pattern and a second sub-sensing electrode pattern; 
     the first sub-sensing electrode pattern comprises a plurality of first sensing electrode lines and a plurality of second sensing electrode lines: 
     each of the first sensing electrode lines comprises a plurality of electrode lines having the first slope and a plurality of electrode lines having the second slope, and the electrode lines having the first slope and the electrode lines having the second slope are connected to each other alternately: 
     each of the second sensing electrode lines comprises a plurality of electrode lines having the seventh slope and a plurality of electrode lines having the eighth slope, and the electrode lines having the seventh slope and the electrode lines having the eighth slope are connected to each other alternately; 
     the first sensing electrode lines and the second sensing electrode lines cross each other; 
     the second sub-sensing electrode pattern and the first sub-sensing electrode pattern are axisymmetrical to each other. 
     In the touch substrate provided by one embodiment of the present disclosure, 
     the second sensing electrode pattern further comprises a third sub-sensing electrode pattern and a fourth sub-sensing electrode pattern; 
     the third sub-sensing electrode pattern comprises a plurality of third sensing electrode lines and a plurality of fourth sensing electrode lines; 
     each of the third sensing electrode lines comprises a plurality of electrode lines having the third slope and a plurality of electrode lines having the fourth slope, and the electrode lines having the third slope and the electrode lines having the fourth slope are connected to each other alternately; 
     each of the fourth sensing electrode lines comprises a plurality of electrode lines having the fifth slope and a plurality of electrode lines having the sixth slope, and the electrode lines having the fifth slope and the electrode lines having the sixth slope are connected to each other alternately; 
     the third sensing electrode lines and the fourth sensing electrode lines cross each other: 
     the fourth sub-sensing electrode pattern and the third sub-sensing electrode pattern are axisymmetrical to each other. 
     In the touch substrate provided by one embodiment of the present disclosure, the touch substrate further comprises an insulation layer covering the first driving electrode pattern, the second driving electrode pattern, the first sensing electrode pattern, and the second sensing electrode pattern. 
     In the touch substrate provided by one embodiment of the present disclosure, the touch substrate further comprises a connection bridge disposed on the insulation layer, wherein the connection bridge is disposed between the first driving electrode pattern and the second driving electrode pattern to electrically connect the first driving electrode pattern to the second driving electrode pattern. 
     In addition, the present disclosure provides a display device, comprising: a first driving electrode pattern, a second driving electrode pattern, a first sensing electrode pattern, a second sensing electrode pattern, a first insulation trench, a second insulation trench, a third insulation trench, and a fourth insulation trench: 
     wherein the first sensing electrode pattern and the second sensing electrode pattern are connected to each other via a connection portion, and the first driving electrode pattern and the second driving electrode pattern are disposed at two sides of the connection portion; 
     wherein the first insulation trench is connected to the second insulation trench, such that the first driving electrode pattern is separated from the first sensing electrode pattern and the second sensing electrode pattern; 
     wherein the third insulation trench is connected to the fourth insulation trench, such that the second driving electrode pattern is separated from the first sensing electrode pattern and the second sensing electrode pattern; 
     wherein the first insulation trench comprises a plurality of trenches having a first slope and a plurality of trenches having a second slope: 
     wherein the second insulation trench comprises a plurality of trenches having a third slope and a plurality of trenches having a fourth slope; 
     wherein the third insulation trench comprises a plurality of trenches having a fifth slope and a plurality of trenches having a sixth slope; 
     wherein the fourth insulation trench comprises a plurality of trenches having a seventh slope and a plurality of trenches having an eighth slope. 
     In the display device provided by one embodiment of the present disclosure, 
     the trenches having the first slope and the trenches having the second slope are connected to each other alternately; 
     the trenches having the third slope and the trenches having the fourth slope are connected to each other alternately; 
     the trenches having the fifth slope and the trenches having the sixth slope are connected to each other alternately; 
     the trenches having the seventh slope and the trenches having the eighth slope are connected to each other alternately. 
     In the display device provided by one embodiment of the present disclosure, 
     the first insulation trench is symmetrical to the second insulation trench with respect to a Y-axis; 
     the third insulation trench is symmetrical to the fourth insulation trench with respect to the Y-axis. 
     In the display device provided by one embodiment of the present disclosure, 
     the first driving electrode pattern comprises a first sub-driving electrode pattern and a second sub-driving electrode pattern; 
     the first sub-driving electrode pattern comprises a plurality of first driving electrode lines and a plurality of second driving electrode lines; 
     each of the first driving electrode lines comprises a plurality of electrode lines having the first slope and a plurality of electrode lines having the second slope, and the electrode lines having the first slope and the electrode lines having the second slope are connected to each other alternately; 
     each of the second driving electrode lines comprises a plurality of electrode lines having the third slope and a plurality of electrode lines having the fourth slope, and the electrode lines having the third slope and the electrode lines having the fourth slope are connected to each other alternately; 
     the first driving electrode lines and the second driving electrode lines cross each other: 
     the second sub-driving electrode pattern and the first sub-driving electrode pattern are axisymmetrical to each other. 
     In the display device provided by one embodiment of the present disclosure, 
     the second driving electrode pattern comprises a third sub-driving electrode pattern and a fourth sub-driving electrode pattern; 
     the third sub-driving electrode pattern comprises a plurality of third driving electrode lines and a plurality of fourth driving electrode lines: 
     each of the third driving electrode lines comprises a plurality of electrode lines having the fifth slope and a plurality of electrode lines having the sixth slope, and the electrode lines having the fifth slope and the electrode lines having the sixth slope are connected to each other alternately; 
     each of the fourth driving electrode lines comprises a plurality of electrode lines having the seventh slope and a plurality of electrode lines having the eighth slope, and the electrode lines having the seventh slope and the electrode lines having the eighth slope are connected to each other alternately; 
     the third driving electrode lines and the fourth driving electrode lines cross each other; 
     the fourth sub-driving electrode pattern and the third sub-driving electrode pattern are axisymmetrical to each other. 
     In the display device provided by one embodiment of the present disclosure, 
     the second sensing electrode pattern further comprises a third sub-sensing electrode pattern and a fourth sub-sensing electrode pattern; 
     the third sub-sensing electrode pattern comprises a plurality of third sensing electrode lines and a plurality of fourth sensing electrode lines; 
     each of the third sensing electrode lines comprises a plurality of electrode lines having the third slope and a plurality of electrode lines having the fourth slope, and the electrode lines having the third slope and the electrode lines having the fourth slope are connected to each other alternately; 
     each of the fourth sensing electrode lines comprises a plurality of electrode lines having the fifth slope and a plurality of electrode lines having the sixth slope, and the electrode lines having the fifth slope and the electrode lines having the sixth slope are connected to each other alternately; 
     the third sensing electrode lines and the fourth sensing electrode lines cross each other; 
     the fourth sub-sensing electrode pattern and the third sub-sensing electrode pattern are axisymmetrical to each other. 
     In the display device provided by one embodiment of the present disclosure, the display device further comprises an insulation layer covering the first driving electrode pattern, the second driving electrode pattern, the first sensing electrode pattern, and the second sensing electrode pattern. 
     In the display device provided by one embodiment of the present disclosure, the display device further comprises a connection bridge disposed on the insulation layer, wherein the connection bridge is disposed between the first driving electrode pattern and the second driving electrode pattern to electrically connect the first driving electrode pattern to the second driving electrode pattern. 
     According to the touch substrate provided by the embodiments of the present disclosure, the shapes of the inside of the electrode patterns are formed to be in consistency with the shapes of the outer peripheries of the electrode patterns, therefore difference of light reflectance between the trenches surrounding the electrode patterns and the inside of the electrode patterns is reduced. Accordingly, the likelihood that the electrode patterns are visually noticeable is lowered, thus raising the visual effects displayed by the display devices. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
       To explain in detail the technical schemes of the embodiments of the present invention, drawings that are used to illustrate the embodiments are provided. Apparently, the illustrated embodiments are just a part of those of the present disclosure. It is easy for any person having ordinary skill in the art to obtain other drawings without labor for inventiveness. 
         FIG. 1  shows a schematic view of a first structure of a touch substrate according to one embodiment of the present disclosure. 
         FIG. 2  shows a schematic view of a second structure of a touch substrate according to one embodiment of the present disclosure. 
         FIG. 3  shows a schematic view of a third structure of a touch substrate according to one embodiment of the present disclosure. 
         FIG. 4  shows a schematic view of a fourth structure of a touch substrate according to one embodiment of the present disclosure. 
         FIG. 5  shows a schematic view of a fifth structure of a touch substrate according to one embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     The technical solutions in embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings of embodiments of the present application. Obviously, the described embodiments are merely some of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained based on the embodiments of the present application by those ordinary skills in the art without doing any creative efforts fall in the protection scope defined by the present application. 
     The present disclosure provides a touch substrate. Detailed description therefor is provided below. 
     Please refer to  FIG. 1 . A touch substrate  100  includes a first driving electrode pattern  10 , a second driving electrode pattern  20 , a first sensing electrode pattern  30 , a second sensing electrode pattern  40 , a first insulation trench  51 , a second insulation trench  52 , a third insulation trench  53 , and a fourth insulation trench  54 . 
     The first sensing electrode pattern  30  and the second sensing electrode pattern  40  are connected to each other via a connection portion  34 . The first driving electrode pattern  10  and the second driving electrode pattern  20  are disposed at two sides of the connection portion  34 . As shown, it is understood that the first sensing electrode pattern  30  is disposed at a left side of the Y-axis, and the second sensing electrode pattern  40  is disposed at a right side of the Y-axis. 
     The first insulation trench  51  is connected to the second insulation trench  52 , such that the first driving electrode pattern  10  is separated from the first sensing electrode pattern  30  and the second sensing electrode pattern  40 . 
     The third insulation trench  53  is connected to the fourth insulation trench  54 , such that the second driving electrode pattern  20  is separated from the first sensing electrode pattern  30  and the second sensing electrode pattern  40 . 
     The first insulation trench  51  comprises a plurality of trenches  511  having a first slope and a plurality of trenches having a second slope  512 . The trenches  511  having the first slope and the trenches  512  having the second slope are connected to each other alternately. 
     The second insulation trench  52  comprises a plurality of trenches  521  having a third slope and a plurality of trenches  522  having a fourth slope. The trenches  521  having the third slope and the trenches  522  having the fourth slope are connected to each other alternately. 
     The third insulation trench  53  comprises a plurality of trenches  531  having a fifth slope and a plurality of trenches  532  having a sixth slope. The trenches  531  having the fifth slope and the trenches  532  having the sixth slope are connected to each other alternately. 
     The fourth insulation trench  54  comprises a plurality of trenches  541  having a seventh slope and a plurality of trenches  542  having an eighth slope. The trenches  541  having the seventh slope and the trenches  542  having the eighth slope are connected to each other alternately. 
     As shown, it is understood that the first insulation trench  51  is symmetrical to the second insulation trench  52  with respect to the Y-axis, and the third insulation trench  53  is symmetrical to the fourth insulation trench  54  with respect the Y-axis. In addition, the first insulation trench  51  is symmetrical to the fourth insulation trench  54  with respect to the X-axis, and the second insulation trench  52  is symmetrical to the third insulation trench  53  with respect the X-axis. In other words, the slope is equal to the fifth slope, the second slope is equal to the sixth slope, the third slope is equal to the seventh slope, and the fourth slope is equal to the eighth slope. 
     It is understood that the first insulation trench  51 , the second insulation trench  52 , the third insulation trench  53 , and the fourth insulation trench  54  can be formed by an etching technique. 
     It is understood that, in description of the present disclosure, terms such as “first” and “second” are used herein for purposes of description and are not intended to indicate or imply relative importance or significance. Thus, the feature defined with “first” and “second” may comprise one or more this feature. 
     In some embodiments, the first driving electrode pattern  10  comprises a first sub-driving electrode pattern  11  and a second sub-driving electrode pattern  12 . 
     The first sub-driving electrode pattern  11  comprises a plurality of first driving electrode lines  111  and a plurality of second driving electrode lines  112 . 
     Each of the first driving electrode lines  111  comprises a plurality of electrode lines  1111  having the first slope and a plurality of electrode lines  1112  having the second slope, and the electrode lines  1111  having the first slope and the electrode lines  1112  having the second slope are connected to each other alternately. 
     Each of the second driving electrode lines  112  comprises a plurality of electrode lines  1121  having the third slope and a plurality of electrode lines  1122  having the fourth slope, and the electrode lines  1121  having the third slope and the electrode lines  1122  having the fourth slope are connected to each other alternately. 
     The first driving electrode lines  111  and the second driving electrode lines  112  cross each other to form a grid pattern. 
     The second sub-driving electrode pattern  12  is symmetrical to the first sub-driving electrode pattern  11  with respect to the Y-axis. 
     In some embodiments, the second driving electrode pattern  20  comprises a third sub-driving electrode pattern  21  and a fourth sub-driving electrode pattern  22 . 
     The third sub-driving electrode pattern  21  comprises a plurality of third driving electrode lines  211  and a plurality of fourth driving electrode lines  212 . 
     Each of the third driving electrode lines  211  comprises a plurality of electrode lines  2111  having the fifth slope and a plurality of electrode lines  2112  having the sixth slope, and the electrode lines  2111  having the fifth slope and the electrode lines  2112  having the sixth slope are connected to each other alternately. 
     Each of the fourth driving electrode lines  212  comprises a plurality of electrode lines  2121  having the seventh slope and a plurality of electrode lines  2122  having the eighth slope, and the electrode lines  2121  having the seventh slope and the electrode lines  2122  having the eighth slope are connected to each other alternately. 
     The third driving electrode lines  211  and the fourth driving electrode lines  212  cross each other to form a grid pattern. 
     The fourth sub-driving electrode pattern  22  is symmetrical to the third sub-driving electrode pattern  21  with respect to the Y-axis. 
     In some embodiments, the first sensing electrode pattern  30  comprises a first sub-sensing electrode pattern  31  and a second sub-sensing electrode pattern  32 . 
     The first sub-sensing electrode pattern  31  comprises a plurality of first sensing electrode lines  311  and a plurality of second sensing electrode lines  312 . 
     Each of the first sensing electrode lines  311  comprises a plurality of electrode lines  3111  having the first slope and a plurality of electrode lines  3112  having the second slope, and the electrode lines  3111  having the first slope and the electrode lines  3112  having the second slope are connected to each other alternately. 
     Each of the second sensing electrode lines  312  comprises a plurality of electrode lines  3121  having the seventh slope and a plurality of electrode lines  3122  having the eighth slope, and the electrode lines  3121  having the seventh slope and the electrode lines  3122  having the eighth slope are connected to each other alternately. 
     The first sensing electrode lines  311  and the second sensing electrode lines  312  cross each other to form a grid pattern. 
     The second sub-sensing electrode pattern  32  is symmetrical to the first sub-sensing electrode pattern  31  with respect to the X-axis. 
     In some embodiments, the second sensing electrode pattern  40  further comprises a third sub-sensing electrode pattern  41  and a fourth sub-sensing electrode pattern  42 . 
     The third sub-sensing electrode pattern  41  comprises a plurality of third sensing electrode lines  411  and a plurality of fourth sensing electrode lines  412 . 
     Each of the third sensing electrode lines  411  comprises a plurality of electrode lines  4111  having the third slope and a plurality of electrode lines  4112  having the fourth slope, and the electrode lines  4111  having the third slope and the electrode lines  4112  having the fourth slope are connected to each other alternately. 
     Each of the fourth sensing electrode lines  412  comprises a plurality of electrode lines  4121  having the fifth slope and a plurality of electrode lines  4122  having the sixth slope, and the electrode lines  4121  having the fifth slope and the electrode lines  4122  having the sixth slope are connected to each other alternately. 
     The third sensing electrode lines  411  and the fourth sensing electrode lines  412  cross each other to form a grid pattern. 
     The fourth sub-sensing electrode pattern  42  is symmetrical to the third sub-sensing electrode pattern  41  with respect to the X-axis. 
     It is understood that the electrode lines of the first driving electrode pattern  10 , the second driving electrode pattern  20 , the first sensing electrode pattern  30 , and the second sensing electrode pattern  40  can be formed by the etching technique. Specifically, an etching step is performed for formation of the first driving electrode pattern  10 , the second driving electrode pattern  20 , the first sensing electrode pattern  30 , and the second sensing electrode pattern  40 , in order to firstly form a plurality of insulation recesses having predetermined shapes, and thus thereby to form the electrode lines of the first driving electrode pattern  10 , the second driving electrode pattern  20 , the first sensing electrode pattern  30 , and the second sensing electrode pattern  40 . Such a structure can ensure that the inside of the electrode patterns have shapes which are in consistency with the shapes of the insulation trenches, thus lowering the likelihood that the electrode patterns are visually noticeable. 
     Please refer to  FIG. 2 , which shows a cross-sectional view of the touch substrate cut along the Y-axis. In some embodiments, the touch substrate  100  can further comprise an insulation layer  70  covering the first driving electrode pattern  10 , the second driving electrode pattern  20 , the first sensing electrode pattern  30 , and the second sensing electrode pattern  40 . A first through-hole  71  and a second through-hole  72  are formed in the insulation layer  70 . Formation of the first through-hole  71  makes the first driving electrode pattern  10  exposed, and formation of the second through-hole  72  makes the second driving electrode pattern  20  exposed. 
     Please refer to  FIG. 3 . The touch substrate  100  can further comprises a connection bridge  80 . The connection bridge  80  is positioned in a center of the touch substrate  100 , and crosses over the first sensing electrode pattern  30  and the second sensing electrode pattern  40 . The connection bridge  80  is disposed between the first driving electrode pattern  10  and the second driving electrode pattern  20  to electrically connect the first driving electrode pattern  10  to the second driving electrode pattern  20 . 
     The connection bridge  80  is disposed in a way as shown in  FIG. 4 , where  FIG. 4  shows a cross-sectional view of the touch substrate of  FIG. 3  cut along the Y-axis. The connection bridge  80  is disposed on the insulation layer  70 , and completely fills the first through-hole  71  and the second through-hole  72  in the insulation layer  70  to be connected to the first driving electrode pattern  10  and the second driving electrode pattern  20 . 
     Please refer to  FIG. 5 . In some embodiments, a plurality of dummy electrodes  90  can be disposed in the insulation recesses of the first driving electrode pattern  10 , the second driving electrode pattern  20 , the first sensing electrode pattern  30 , and the second sensing electrode pattern  40 . In addition, a plurality of dummy electrodes  90  can be disposed in the first insulation trench  51 , the second insulation trench  52 , the third insulation trench  53 , and the fourth insulation trench  54 . 
     It is understood that, in  FIG. 5 , only the dummy electrodes  90  in the first sub-sensing electrode pattern  31  and the first insulation trench  51  are shown. Nevertheless, the dummy electrodes  90  can be disposed in the first driving electrode pattern  10 , the second driving electrode pattern  20 , the second sub-sensing electrode pattern  32 , the second sensing electrode pattern  40 , the second insulation trench  52 , the third insulation trench  53 , and the fourth insulation trench  54  in the same way. 
     The dummy electrodes  90  are suspended without being connected to the electrode pattern. The dummy electrodes  90  are used to adjust distances among the first driving electrode pattern  10 , the second driving electrode pattern  20 , the first sensing electrode pattern  30 , and the second sensing electrode pattern  40 , such that the mutual capacitances among the first driving electrode pattern  10 , the second driving electrode pattern  20 , the first sensing electrode pattern  30 , and the second sensing electrode pattern  40  can be modified. In addition, the dummy electrodes  90  are used to make the insulation recesses of the first driving electrode pattern  10 , the second driving electrode pattern  20 , the first sensing electrode pattern  30 , and the second sensing electrode pattern  40  as well as the first insulation trench  51 , the second insulation trench  52 , the third insulation trench  53 , and the fourth insulation trench  54  to have the same light reflectance and light transmittance as that in the non-etched regions. Therefore, the likelihood that the electrode patterns are visually noticeable is lowered. 
     In some embodiments, the touch substrate  100  is disposed on a flexible substrate  60 . A lot of metal lead lines are formed at periphery of the touch substrate  100 . The metal lead lines are connected to the flexible substrate  60 . 
     According to the touch substrate provided by the embodiments of the present disclosure, the shapes of the inside of the electrode patterns are formed to be in consistency with the shapes of the outer peripheries of the electrode patterns, therefore difference of light reflectance between the trenches surrounding the electrode patterns and the inside of the electrode patterns is reduced. Accordingly, the likelihood that the electrode patterns are visually noticeable is lowered, thus raising the visual effects displayed by the display devices. 
     In addition, the present disclosure provides a display device. The display device includes a touch substrate, as described in the above embodiments. Please refer to the above embodiments for details of the touch substrate, and description thereof is thus omitted. It is understood that the display device can include any one of the touch substrates described in the above embodiments. 
     In the foregoing embodiments, the description of each of the embodiments has respective focuses. For a part that is not described in detail in a certain embodiment, reference may be made to related descriptions in other embodiments. 
     While the present disclosure has been described with the aforementioned preferred embodiments, it is preferable that the above embodiments should not be construed as limiting of the present disclosure. Anyone having ordinary skill in the art can make a variety of modifications and variations without departing from the spirit and scope of the present disclosure as defined by the following claims.