TW201327340A - Sensing electrode structure and touch panel employing the same - Google Patents

Abstract

An embodiment of the present disclosure provides a sensing electrode structure comprising a plurality of first axial electrodes and a plurality of second axial electrodes. The second axial electrodes and the first axial electrodes are formed on same side of a substrate and are electrically insulated from each other. Each of the first axial electrodes has a plurality of first conductive patterns with grid structures, and the first conductive patterns with grid structures are electrically connected with each other. Each of the second axial electrodes has a plurality of second conductive patterns with grid structures, and the second conductive patterns with grid structures are electrically connected with each other.

Description

Sensing electrode structure and touch panel thereof

The invention relates to a sensing electrode structure and a touch panel thereof, and in particular to a touch panel having a sensing electrode structure capable of increasing a capacitance value and an application thereof.

With the advancement of semiconductor and circuit design technology, touch devices are widely used in handheld devices or other electronic devices, wherein the touch device includes a touch panel and a controller. For example, a typical smart phone has a touch panel, and the touch panel has a sensing electrode array, wherein the sensing electrode array has a plurality of scanning lines and driving lines. The controller can transmit the driving signal to the driving line of the sensing electrode array, and receive the sensing signal on the scanning line to interpret the touch area of the user on the touch panel.

Please refer to FIG. 1. FIG. 1 is a top view of a sensing electrode structure of a conventional touch panel. The touch panel includes a substrate and a sensing electrode structure formed on the same surface of the substrate. The sensing electrode structure has a plurality of first axial electrodes 11 and a plurality of second axial electrodes 12, wherein the plurality of first axial electrodes 11 and the plurality of second axial electrodes 12 may form a sensing electrode array. Used to sense the touch area.

In FIG. 1, the first axial electrode 11 is an X-axis electrode, and the second axial electrode 12 is a Y-axis electrode. Each of the first axial electrodes 11 has a plurality of diamond-shaped conductive patterns 111 , wherein each of the diamond-shaped conductive patterns 111 is electrically connected to the adjacent diamond-shaped conductive patterns 111 through the first conductive elements 112 . Each of the second axial electrodes 12 has a plurality of diamond-shaped conductive patterns 121, wherein each of the diamond-shaped conductive patterns 121 and the adjacent diamond-shaped conductive patterns 121 pass through the second guide The electrical component 122 is electrically connected. In addition, the sensing electrode structure further includes a plurality of insulating spacers (not shown in FIG. 1 ) disposed between the second conductive element 122 and the corresponding first conductive element 112 respectively to enable the first axial electrode 11 and the first The two axial electrodes 12 are electrically insulated from each other.

The length of the adjacent side between the diamond-shaped conductive patterns 111 and 121 affects the capacitance value of the coupling capacitor. The longer the length, the larger the capacitance value. If the capacitance value of the coupling capacitance generated between the first axial electrode 11 and the second axial electrode 12 is not large enough, the sensing uniformity of the sensing electrode array will be less than ideal, thereby affecting the touch panel. Line linearity.

Please refer to FIG. 2A and FIG. 2B , which are schematic diagrams showing the linearity of the scribe lines on the conventional touch panel using 5 and 6 cm copper cylinders, respectively. In FIG. 2A and FIG. 2B, the user underlines the line from the upper left to the lower right and the upper left to the left at a speed of 10 meters per second. The sensing circuit interprets the scribe track on the touch panel as 21-24. 2A and 2B, the linearity of the scribe line of the touch panel using the rhombic conductive patterns 111 and 121 is not satisfactory.

In order to improve the linearity of the scribe line of the touch panel and increase the amount of signal change, it is necessary to introduce a new conductive pattern into the sensing electrode structure of the touch panel.

The invention improves the conductive pattern in the sensing electrode structure of the touch panel to increase the capacitance value generated by the coupling between the conductive patterns, so that the linearity of the scribe line of the touch panel is improved.

Embodiments of the present invention provide a sensing electrode structure, the sensing electrode structure including a plurality of first axial electrodes and a plurality of second axial electrodes. The plurality of second axial electrodes and the plurality of first axial electrodes are formed on the substrate One side, and electrically insulated from the plurality of first axial electrodes. Each of the first axial electrodes has a plurality of first conductive patterns of a grid structure, and the plurality of first conductive patterns of the grid structures are electrically connected to each other. Each of the second axial electrodes includes a plurality of second conductive patterns of a grid structure, and the plurality of second conductive patterns of the grid structure are electrically connected to each other.

The embodiment of the invention further provides a touch panel, which comprises a substrate and the sensing electrode structure.

In summary, the embodiment of the present invention provides a sensing electrode structure of a touch panel. The conductive pattern in the sensing electrode structure can improve the sensing uniformity by increasing the capacitance value of the coupling capacitor, so that the touch panel is The linearity of the scribe line is improved, and when the touch panel is touched by multiple points, the amount of change in the sensing signal on the touch area is not greatly reduced due to the multi-touch.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings Make any restrictions.

Please refer to FIG. 3. FIG. 3 is a schematic cross-sectional view of a touch panel according to an embodiment of the present invention. The touch panel 3 provided in this embodiment includes a protective layer 31, a conductive layer 32, and a substrate 33. The conductive layer 32 can be, for example, a material using indium tin oxide (ITO) for forming on the substrate 33, and the conductive layer 32 further forms a sensing electrode structure through a patterning process for sensing. Touch the area. Thereby, the present embodiment can construct a sensing electrode structure of a single layer of ITO. In addition, the protective layer 31 is further formed on the conductive layer 32, It is used to fully cover the sensing electrode structure and provide the function of protecting the sensing electrode structure. It should be noted that the above-described cross-sectional structure of the touch panel 3, the material of the conductive layer 32, and the shape and structure of the various sensing electrode structures which are further specifically described below are not intended to limit the present invention.

Referring to FIG. 4 , FIG. 4 is a top view of a sensing electrode structure of a touch panel according to an embodiment of the present invention. The sensing electrode structure of this embodiment includes a plurality of first axial electrodes 41 and a plurality of second axial electrodes 42. The first axial electrode 41 is, for example, an X-axis electrode, and the second axial electrode 42 corresponds to the first axial electrode 41 and is, for example, a Y-axis electrode. The first axial electrode 41 and the second axial electrode 42 of the present embodiment are formed on the same side of the substrate 32 and are electrically insulated from each other. In addition, the first axial electrode 41 and the second axial electrode 42 are cut by a fractal to form electrical insulation, so the cutting line is in a grid shape to increase the optical compensation effect. However, the manner in which the first axial electrode 41 and the second axial electrode 42 are cut is not limited by this embodiment.

Each of the first axial electrodes 41 includes a plurality of first conductive patterns 411 of a grid structure, and the first conductive patterns 411 of the plurality of grid structures are electrically connected to each other. Each of the second axial electrodes 42 includes a plurality of second conductive patterns 421 of a grid structure, and the second conductive patterns 421 of the plurality of grid structures are electrically connected to each other.

More specifically, each of the first axial electrodes 41 further includes a plurality of first conductive elements 412 for electrically connecting the first conductive patterns 411 of adjacent ones of the first axial electrodes 41, Each of the second axial electrodes 42 includes a plurality of second conductive elements 422 for electrically connecting the second conductive patterns 421 of the adjacent second gate electrodes 42 and adjacent grid structures. In addition, the sensing electrode structure further includes a plurality of insulating spacers (not shown in the figure) 4) is respectively disposed between the first conductive element 412 and the corresponding second conductive element 422, so that the first conductive element 412 is actually electrically connected to the first conductive of the two adjacent grid structures in a bridge state. The pattern 411, whereby the first axial electrode 41 and the second axial electrode 42 are electrically insulated from each other. It should be noted that the first conductive element 412 of the embodiment may be designed with a conductive material such as a metal wire or an indium tin oxide.

The first conductive pattern 411 of each of the grid structures includes a trunk structure 4111, a plurality of branch structures 4112, and a plurality of sub-branched structures 4113. The trunk structure 4111 of the first conductive pattern 411 of the two axially adjacent two grid-like structures is electrically connected through the first conductive element 412. Furthermore, the two branch structures 4112 of the present embodiment respectively extend in both directions of the autonomous dry structure 4111, and each of the two sub-branched structures 4113 extends from both sides of a branching structure 4112.

Further, in FIG. 4, the first conductive pattern 411 of the grid structure may be a symmetric conductive pattern. In addition, the sub-branch structure 4113 of the first conductive pattern 411 of the grid structure extends from both sides of the intermediate portion of the branching structure 4112, the sub-branched structure 4113 may be parallel to the trunk structure 4111, and the branching structure 4112 may be perpendicular to the trunk structure. 4111. In addition, the length and width of the first conductive pattern 411 of each of the grid structures may be the same as the upper and lower sides and the left and right widths of the conventional rhombic conductive pattern, respectively, which are 5.63 and 5.51 cm, respectively.

The second conductive pattern 421 of each of the grid structures includes a stem structure 4211 and a plurality of branch structures 4212. The trunk structure 4211 of the second conductive pattern 421 of the two axially adjacent two grid-like structures is electrically connected through the second conductive element 422. Furthermore, in this embodiment, each of the two branch structures 4212 extends in the direction of both sides of the autonomous dry structure 4211.

Furthermore, in FIG. 4, the second conductive pattern 421 of the grid structure may be a symmetric conductive pattern. In addition, the plurality of branch structures 4212 of the second conductive pattern 421 of the grid structure extend in both directions of the upper end, the middle and the lower end portions of the autonomous dry structure 4211, and the branch structure 4212 may be perpendicular to the trunk structure 4211. In addition, the length and width of the second conductive pattern 421 of each of the grid structures may be, for example, the same as the upper and lower sides and the left and right widths of the conventional rhombic conductive pattern, which are 5.63 and 5.51 cm, respectively.

Please note that the design of the first conductive pattern 411 and the second conductive pattern 421 of the above-described grid structure is not intended to limit the present invention. In the embodiment of the present invention, the side length of the adjacent side between each of the first conductive patterns 411 and each of the second conductive patterns 421 is increased by the grid structure design to increase the capacitance value. Therefore, it is possible to improve the linearity of the scribe line of the touch panel and the amount of change of the sensing signal under the multi-touch. Any other grid structure that can effectively increase the length of the conductive pattern can be applied to the sensing electrode array of the present invention.

Please refer to FIG. 5. FIG. 5 is a top view of a sensing electrode structure of a touch panel according to another embodiment of the present invention. The difference between the sensing electrode structures of FIG. 5 and FIG. 4 is mainly due to the difference in the conductive patterns of the grid structure. Accordingly, the following description will be made only for the first conductive pattern 511 of the first axial electrode 51 and the second conductive pattern 521 of the second axial electrode 52.

The first conductive pattern 511 of each of the grid structures includes a trunk structure 5111, a plurality of branch structures 5112, 5113, and a plurality of sub-branched structures 5114. The trunk structure 5111 of the first conductive pattern 511 of the two axially adjacent two grid-like structures is electrically connected through the first conductive element 512. Furthermore, in this embodiment, each of the two branch structures 5113 respectively extends in both directions of one of the two end portions of the autonomous dry structure 5111, and the other two branch structures 5112 respectively have two intermediate portions of the autonomous dry structure 5111. side The direction extends, and each of the two sub-branched structures 5114 extends in the direction of both sides of any of the branching structures 5112 extending from the intermediate portion of the autonomous dry structure 5111.

Furthermore, in FIG. 5, the first conductive pattern 511 of the grid structure may be a symmetric conductive pattern. In addition, the sub-branch structure 5114 of the first conductive pattern 511 of the grid structure extends from both sides of the intermediate portion of the branching structure 5112, and any sub-branched structure 5114 is composed of two large and small rectangular structures, wherein the branches The portion of the structure 5112 that is connected to the sub-branched structure 5114 is a smaller rectangular structure, and the portion of the tail end of the sub-branched structure 5114 is a larger rectangular structure. The width of the branching structure 5112 is less than the width of the branching structure 5113. Sub-branched structure 5114 can be parallel to backbone structure 5111, while branching structures 5112 and 5113 can be perpendicular to backbone structure 5111. In addition, the length and width of the first conductive pattern 511 of each of the grid structures may be the same as the upper and lower lengths and the left and right widths of the conventional diamond-shaped conductive pattern, respectively, which are 5.63 and 5.51 cm, respectively.

The second conductive pattern 521 of each of the grid structures includes a stem structure 5211 and a plurality of branch structures 5212. The trunk structure 5211 of the second conductive pattern 521 of the two second adjacent grid structures is electrically connected through the second conductive element 522. Furthermore, in this embodiment, each of the two branch structures 5212 extends in the direction of both sides of the autonomous dry structure 5211. Any of the branch structures 5212 is composed of two large and small rectangular structures, wherein the portion of the branch structure 5212 connected to the trunk structure 5211 is a smaller rectangular structure, and the portion of the tail end of the branch structure 5212 is larger. Rectangular structure.

Furthermore, in FIG. 5, the second conductive pattern 521 of the grid structure may be a symmetric conductive pattern. In addition, the plurality of branch structures 5212 of the conductive pattern 521 of the grid structure are in the upper end and the middle of the autonomous dry structure 5211. The intermediate and lower end portions extend in both directions, and the branching structure 5212 can be perpendicular to the trunk structure 5211. In addition, the length and width of the second conductive pattern 521 of each of the grid structures may be the same as the upper and lower lengths and the left and right widths of the conventional diamond-shaped conductive pattern, respectively, which are 5.63 and 5.51 cm, respectively.

Please refer to FIG. 6. FIG. 6 is a top view of a sensing electrode structure of a touch panel according to another embodiment of the present invention. The difference in the structure of the sensing electrodes of FIGS. 6 and 4 is mainly due to the difference in the conductive patterns of the grid structure. Accordingly, the following description will be made only for the first conductive pattern 611 and the second conductive pattern 621 of the grid structure.

The first conductive pattern 611 of each of the grid structures includes a trunk structure 6111, a plurality of branch structures 6112, and a plurality of sub-branched structures 6113. The trunk structure 6111 of the first conductive pattern 611 of the two axially adjacent two grid-like structures is electrically connected through the first conductive element 612. Furthermore, the two branch structures 6112 of the present embodiment respectively extend in both directions of the autonomous dry structure 6111, and each of the two sub-branched structures 6113 extends from both sides of a branching structure 6112.

Further, in FIG. 6, the first conductive pattern 611 of the grid structure may be a symmetric conductive pattern. In addition, the sub-branched structure 6113 of the first conductive pattern 611 of the grid structure extends from both sides of the tail end portion of the branching structure 612, the sub-branched structure 6113 may be parallel to the trunk structure 6111, and the branching structure 6112 may be perpendicular to the trunk Structure 6111. In addition, the length and width of the first conductive pattern 611 of each of the grid structures may be the same as the upper and lower sides and the left and right widths of the conventional rhombic conductive pattern, respectively, which are 5.63 and 5.51 cm, respectively.

The second conductive pattern 621 of each of the grid structures includes a stem structure 6211 and a plurality of branch structures 6212. Wherein two grids adjacent in the second axial direction The trunk structure 6211 of the second conductive pattern 621 of the structure is electrically connected through the second conductive element 622. Furthermore, in this embodiment, each of the two branch structures 6212 extends in the direction of both sides of the autonomous dry structure 6211.

Further, in FIG. 6, the second conductive pattern 621 of the grid structure may be a symmetric conductive pattern. In addition, the plurality of branch structures 6212 of the second conductive pattern 621 of the grid structure extend in both directions of the upper end, the middle and the lower end portions of the autonomous dry structure 6211, and the branch structure 6212 may be perpendicular to the trunk structure 6211. In addition, the length and width of the second conductive pattern 621 of each of the grid structures may be the same as the upper and lower sides and the left and right widths of the conventional rhombic conductive pattern, respectively, which are 5.63 and 5.51 cm, respectively.

Please refer to FIG. 7. FIG. 7 is an enlarged plan view showing the intersection of different axial electrodes according to an embodiment of the present invention. As shown in FIG. 7, the first conductive patterns 741 and 742 of the grating structure of the first axial electrode are electrically connected to each other through the first conductive member 71, and the second structure of the second axial electrode is second. The conductive patterns 731 and 732 are electrically connected to each other through the second conductive member 72. Additionally, as previously described, the insulating spacers 73 are further disposed between the first conductive element 71 and the corresponding second conductive element 72 to electrically insulate the first axial electrode from the second axial electrode.

Please refer to FIG. 8. FIG. 8 is a schematic diagram of each sensing point in the touch panel provided by the implementation of the present invention. It is assumed that the user sequentially accumulates the touch points by touching the touch areas P1 to P4 on the touch panel of FIG. 8 to form a multi-touch. In this case, if the sensing electrode structure of the touch panel is experimentally performed by using the conductive pattern of the grid structure of FIG. 4, FIG. 5, and FIG. 6, and the conventional diamond-shaped conductive pattern, it can be known from the experimental data that the touch area is When all of P1~P4 are touched, the attenuation of the sensing signals measured by different conductive patterns is 40.5%, 30.28%, 38.11% and 56.70%, respectively, and the measured sensing The amount of change in the signals is 496, 663, 583, and 300, respectively. From this point of view, the signal attenuation amount of the conductive pattern of the grid structure is lower than the signal attenuation amount of the rhombic conductive pattern, and the signal variation amount of the conductive pattern of the grid structure is higher than the signal variation amount of the rhombic conductive pattern.

Please refer to FIG. 9A to FIG. 11B . FIG. 9A and FIG. 9B are respectively schematic diagrams showing the linearity of the scribe line on the touch panel using the sensing electrode structure of FIG. 4 using 5 and 6 cm copper pillars, FIG. 10A and FIG. 10B is a schematic diagram of the linearity of the scribe line on the touch panel using the 5 and 6 cm copper cylinders respectively using the sensing electrode structure of FIG. 5, and FIGS. 11A and 11B are respectively the 5 and 6 cm copper pillars. A schematic diagram of the linearity of the scribe line on the touch panel using the sensing electrode structure of FIG.

In FIG. 9A to FIG. 11B, the user underlines the top left to the lower left and the lower right to the lower left at a speed of 10 meters per second. The sensing circuit interprets the line of the touch panel using the sensing electrode structure of FIG. The trajectory is 81-84, and the scribe track of the touch panel using the sensing electrode structure of FIG. 5 is 91-94, and the scribe track of the touch panel using the sensing electrode structure of FIG. 6 is 101-104. . As can be seen from FIG. 9A to FIG. 11B, the touch panel using the sensing electrode structure of FIGS. 4 to 6 can have better scribe linearity than the sensing electrode structure using the conventional diamond-shaped conductive pattern.

In summary, the embodiments of the present invention provide a sensing electrode structure and a touch panel thereof, and the conductive pattern of the grid structure in the sensing electrode structure can improve the linearity of the line of the touch panel, and at the same time When the touch panel is touched by multiple points, the amount of change of the sensing signal on the touch area is not greatly reduced due to multi-touch, which effectively increases the sensing accuracy.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Ming's patent range.

11, 41, 51, 61‧‧‧ first axial electrodes

12, 42, 52, 62‧‧‧ second axial electrode

111, 121‧‧‧ rhombic conductive patterns

112‧‧‧First conductive element

122‧‧‧Second conductive element

21~24, 81~84, 91~94, 101~104‧‧‧ scribe track

3‧‧‧Touch panel

31‧‧‧Protective layer

32‧‧‧ Conductive layer

33‧‧‧Substrate

411, 511, 611, 741, 742‧‧ ‧ first conductive pattern of the grid structure

421, 521, 621, 731, 732‧‧ ‧ second conductive pattern of the grid structure

412, 512, 612, 71‧‧‧ first conductive components

422, 522, 622, 72‧‧‧ second conductive element

4111, 4211, 5111, 5211, 6111, 6211‧‧‧ backbone structure

4112, 4212, 5112, 5113, 5212, 6112, 6212‧‧ ‧ branching structure

4113, 5114, 6113‧‧‧ sub-branched structure

73‧‧‧Insulated compartment

P1~P4‧‧‧ Touch area

1 is a top plan view of a sensing electrode structure for a conventional touch panel.

2A and 2B are schematic diagrams showing the linearity of the scribe lines on the conventional touch panel using 5 and 6 cm copper cylinders, respectively.

3 is a cross-sectional view of a touch panel according to an embodiment of the invention.

4 is a top plan view of a sensing electrode structure of a touch panel according to an embodiment of the invention.

FIG. 5 is a top plan view of a sensing electrode structure of a touch panel according to another embodiment of the present invention.

FIG. 6 is a top plan view of a sensing electrode structure of a touch panel according to another embodiment of the present invention.

FIG. 7 is an enlarged plan view showing an intersection portion of conductive members of different axial directions according to an embodiment of the present invention.

FIG. 8 is a schematic diagram of each sensing point in the touch panel provided by the implementation of the present invention.

9A and 9B are schematic diagrams showing the linearity of the scribe lines on the touch panel using the sensing electrode structure of FIG. 4, respectively, using 5 and 6 cm copper pillars.

10A and 10B are schematic diagrams showing the linearity of the scribe lines on the touch panel using the sensing electrode structure of FIG. 5, respectively, using 5 and 6 cm copper pillars.

11A and 11B are schematic diagrams showing the linearity of the scribe line on the touch panel using the sensing electrode structure of FIG. 6 using a 5 and 6 cm copper cylinder, respectively.

51‧‧‧First axial electrode

52‧‧‧second axial electrode

511‧‧‧The first conductive pattern of the grid structure

521‧‧‧second conductive pattern of the grid structure

512‧‧‧First conductive element

522‧‧‧Second conductive element

5111, 5211‧‧‧ backbone structure

5112, 5113, 5212‧‧‧ branch structure

5114‧‧‧Sub-branched structure

Claims (16)

A sensing electrode structure includes: a plurality of first axial electrodes, each of the first axial electrodes comprising a plurality of first conductive patterns of a grid structure, and a first conductive pattern of the plurality of grid structures Electrically connected to each other; and a plurality of second axial electrodes formed on the same side of the substrate as the plurality of first axial electrodes, and electrically insulated from the plurality of first axial electrodes, wherein each The second axial electrode comprises a plurality of second conductive patterns of a grid structure, and the second conductive patterns of the plurality of grid structures are electrically connected to each other. The sensing electrode structure of claim 1, wherein each of the first axial electrodes further comprises a plurality of first conductive elements electrically connected to the adjacent ones of the first axial electrodes The first conductive pattern of the grid structure. The sensing electrode structure of claim 2, wherein each of the second axial electrodes further comprises a plurality of second conductive elements electrically connected to the adjacent ones of the second axial electrodes a second conductive pattern of the grid structure. The sensing electrode structure of claim 3, wherein the sensing electrode structure further comprises a plurality of insulating spacers respectively disposed between the first conductive element and the corresponding second conductive element. The sensing electrode structure of claim 1, wherein the first conductive pattern of each of the grating structures comprises a trunk structure, a plurality of branching structures and a plurality of sub-branched structures, wherein the trunk structure is transparent a first conductive element electrically connected to a main structure of a first conductive pattern of the adjacent grating structure, the plurality of branch structures respectively from the main junction The two sides of the structure extend from both sides of the branching structure. The sensing electrode structure of claim 5, wherein the first conductive pattern of the grid structure is a symmetric conductive pattern. The sensing electrode structure of claim 5, wherein the plurality of sub-branched structures of the first conductive pattern of the grating structure extend from both sides of an intermediate portion of the branching structure, A plurality of sub-branched structures are parallel to the backbone structure, and the plurality of branching structures are perpendicular to the backbone structure. The sensing electrode structure of claim 1, wherein the second conductive pattern of each of the grating structures comprises a trunk structure and a plurality of branching structures, wherein the trunk structure is electrically transmitted through the second conductive component a trunk structure connected to the second conductive pattern of the adjacent grid structure, the stem structure is electrically insulated from the first conductive pattern of the adjacent grid structure, and the plurality of branch structures are respectively The two sides of the autonomous dry structure extend in both directions. The sensing electrode structure of claim 8, wherein the second conductive pattern of the grid structure is a symmetric conductive pattern. The sensing electrode structure of claim 8, wherein the plurality of branching structures of the second conductive pattern of the grid structure extend from both sides of the upper end, the middle and the lower end of the trunk structure And the plurality of branch structures are perpendicular to the trunk structure. The sensing electrode structure of claim 5, wherein the plurality of branching structures of the first conductive pattern of the grid structure are respectively from two sides of the both ends and the middle portion of the trunk structure Extending, the plurality of sub-branched structures extending from an intermediate portion of the trunk structure The intermediate portion of the branching structure extends in both directions. The sensing electrode structure of claim 11, wherein the sub-branched structure of the first conductive pattern of the grating structure is composed of two large and small rectangular structures, wherein the branch structure and The portion of the sub-branched structure is connected to a smaller rectangular structure, and the portion of the tail end of the sub-branched structure is a larger rectangular structure. The sensing electrode structure of claim 8, wherein the branching structure of the second conductive pattern of the grid structure is composed of two large and small rectangular structures, wherein the branch structure and the The portion of the trunk structure is connected to a smaller rectangular structure, and the portion of the tail end of the branch structure is a larger rectangular structure. The sensing electrode structure of claim 5, wherein the plurality of sub-branched structures of the first conductive pattern of the grating structure extend from both sides of a tail end portion of the branching structure, The plurality of sub-branched structures are parallel to the backbone structure, and the plurality of branch structures are perpendicular to the backbone structure. A touch panel includes: a substrate; and a sensing electrode structure including a plurality of first axial electrodes and a plurality of second axial electrodes, the plurality of first axial electrodes and the plurality of second axial directions Electrodes are formed on the same side of the substrate and electrically insulated from each other, wherein the first axial electrode includes a plurality of first conductive patterns of a grid structure, and the first conductive patterns of the plurality of grid structures are electrically connected to each other Optionally, the second axial electrode comprises a plurality of second conductive patterns of a grid structure, and the second conductive patterns of the plurality of grid structures are electrically connected to each other. The touch panel of claim 15, further comprising: a protective layer covering the sensing electrode structure.