TWI502426B - Touch panel and its induction electrode structure - Google Patents

Description

Touch panel and its sensing electrode structure

The invention relates to a sensing electrode structure of a touch panel, in particular to a touch panel which integrates a line resistance type sensing electrode and a square resistance type sensing electrode.

Referring to FIG. 13 , the conventional capacitive touch panel 90 is formed on a substrate 91 with a plurality of first sensing electrode strings 92 made of transparent electrodes (ITO), a plurality of second sensing electrode strings 93 , and The plurality of metal wires 94 and 95 respectively connected to the first sensing electrode string 92 and the second sensing electrode string 93, the first sensing electrode strings 92 and the second sensing electrode strings 93 are respectively on the surface of the substrate 91. The first and second sensing electrode strings 92 and 93 respectively include a plurality of mutually connected and diamond-shaped sensing electrodes 921 and 931, and the first sensing electrode string 92 and the first and second intersecting electrodes are detected. The capacitance of the two sensing electrode strings 93 changes to identify the position or area in which the user clicks on the touch panel 90.

As can be seen from the above, the sensing electrodes 921, 931 are made of a transparent electrode (ITO). Since the transparent electrode is a square resistance (Ω/□), the resistance value is related to the thickness, and the resistance is increased when the thickness is increased. The value will decrease (the conductivity is increased), but the light transmittance will increase due to the increase in thickness. For the reduction, if the light transmittance is to be increased, the thickness is required to be increased, the resistance value is increased (the conductivity is lowered), and when the conductivity is lowered, the transparent electrode is insensitive to the sensing; that is, the touch panel is added. The touch sensitivity of 90 must increase the thickness of each of the sensing electrodes 921 and 931, but the transmittance of the touch panel 90 is reduced. Since the transmittance and the conductivity are inversely proportional, the existing capacitive touch The panel can only compromise between light transmittance and sensitivity, resulting in a problem that cannot simultaneously achieve high light transmittance and high sensitivity.

As described above, the conventional touch panel is limited by the material characteristics of the transparent electrode having a sheet resistance, and the problem that the light transmittance cannot be simultaneously increased and the sensitivity is increased. Therefore, the main object of the present invention is to provide a touch panel and a touch panel thereof. The sensing electrode structure forms a sensing pattern of the sensing electrodes of one of the sensing electrode strings of the touch panel, and the sensing pattern is a line resistance type having an opening to increase the light transmittance, increasing the thickness of the sensing electrode and reducing the existing The resistance value of the square resistance of the sensing electrode increases the conductivity and the sensing sensitivity, and solves the problem that the existing touch panel cannot simultaneously consider high transmittance and high sensitivity.

The main technical means for achieving the foregoing object is the sensing electrode structure of the touch panel, comprising: a first electrode group including a plurality of first sensing electrode strings arranged in parallel in a first direction and arranged side by side Each of the first sensing electrode strings has a plurality of Connected first sensing electrodes, each of the first sensing electrodes forms a first electrode pattern, the first electrode pattern has more than one opening; and a second electrode group includes a plurality of channels parallel in the second direction And a second sensing electrode string arranged side by side, each of the second sensing electrode strings has a plurality of connected second sensing electrodes, each of the second sensing electrodes forms a second electrode pattern different from the first electrode pattern, and second The second direction of the sensing electrode string is parallel or intersects with the first direction of the first sensing electrode string.

The main technical means for achieving the foregoing object is that the touch panel comprises: a substrate; a second electrode group formed on the substrate, the second electrode group comprising a plurality of channels parallel in the second direction And a second sensing electrode string arranged side by side, each of the second sensing electrode strings having a plurality of connected second sensing electrodes, each of the second sensing electrodes forming a second electrode pattern; and an insulating layer formed on the second electrode group And a first electrode group formed on the insulating layer, the first electrode group includes a plurality of first sensing electrode strings arranged in parallel in a first direction and arranged side by side, each of the first sensing electrode strings having a plurality of Connected first sensing electrodes, each of the first sensing electrodes forms a first electrode pattern different from the second electrode pattern, the first electrode pattern has more than one opening, and the first direction of the first sensing electrode string And parallel or intersect with the second direction of the second sensing electrode string.

The touch panel of the touch panel and the sensing electrode structure of the touch panel, the first electrode pattern of the touch panel has an opening and is a line resistance type, and the second electrode pattern is a sheet resistance type different from the line resistance type. The first electrode pattern has one or more openings and is divided into a hollow shape, a grid shape or a mesh shape, and is formed by printing or transfer. The opening of the first electrode pattern can increase the first electrode group. The light penetration rate increases the light transmittance, so that the first electrode group can increase its thickness to reduce its resistance value, and improve the conductivity and the sensing sensitivity, so that the existing capacitive touch panel cannot simultaneously achieve high light transmittance and High sensitivity to the problem.

10‧‧‧Substrate

11‧‧‧Links

111‧‧‧First contact

112‧‧‧second junction

20‧‧‧First electrode group

21‧‧‧First induction electrode string

211‧‧‧First sensing electrode

212‧‧‧Connecting line

213, 213A‧‧‧ sensing line

214‧‧‧ openings

22‧‧‧ first end

23‧‧‧ second end

24‧‧‧Wire

30‧‧‧Insulation

40‧‧‧Second electrode group

41‧‧‧Second induction electrode string

411‧‧‧Second sensing electrode

412‧‧‧Connecting line

42‧‧‧ first end

43‧‧‧ second end

44‧‧‧ wire

90‧‧‧Touch panel

91‧‧‧Substrate

92‧‧‧First induction electrode string

921‧‧‧Induction electrode

93‧‧‧Second sensor string

931‧‧‧Induction electrode

94, 95‧‧‧Metal wires

A, B, C, D, E, F‧‧‧ electrode patterns

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a plan view of a first preferred embodiment of the present invention.

Figure 2 is an exploded perspective view of a first preferred embodiment of the present invention.

Fig. 3 is a view showing another aspect of the first electrode pattern of the first preferred embodiment of the present invention.

Fig. 4 is a view showing still another aspect of the first electrode pattern of the first preferred embodiment of the present invention.

Fig. 5 is a view showing still another aspect of the first electrode pattern of the first preferred embodiment of the present invention.

Figure 6 is an exploded perspective view of a second preferred embodiment of the present invention.

Figure 7 is a partial enlarged view of a second preferred embodiment of the present invention.

Figure 8 is an exploded perspective view of a third preferred embodiment of the present invention.

Figure 9 is an exploded view of a fourth preferred embodiment of the present invention.

Figure 10 is a plan view of a fifth preferred embodiment of the present invention.

Figure 11 is a partially enlarged view (I) of a fifth preferred embodiment of the present invention.

Figure 12 is a partially enlarged view (2) of a fifth preferred embodiment of the present invention.

13 is a cross-sectional view of a sensing electrode of a conventional touch panel.

Referring to FIG. 1 and FIG. 2, a substrate 10 is provided with a first electrode group 20, an insulating layer 30 and a second electrode group 40. The second electrode group is provided. 40. The insulating layer 30 and the first electrode group 20 are sequentially stacked on the same surface of the substrate 10, and the first electrode group 20 and the second electrode group 40 are separated by the insulating layer 30. In the preferred embodiment, the The first electrode group 20 is of a line resistance type, and the second electrode group 40 is of a sheet resistance type. The first electrode group 20 includes a plurality of first sensing electrode strings 21 arranged in parallel and spaced apart from each other. Each of the first sensing electrode strings 21 has a plurality of connected first sensing electrodes 211 respectively. The second electrode group 40 includes A plurality of second sensing electrode strings 41 are arranged in parallel and spaced apart from each other, and each of the second sensing electrode strings 41 has a plurality of connected second sensing electrodes 411.

The substrate 10 has a surface and a bottom surface. One end of the surface is provided with a connecting port 11 . The connecting port 11 includes a plurality of first contacts 111 and a plurality of second contacts 112. Each of the first contacts 111 is coupled to One end of each of the first sensing electrode strings 21 of the first electrode group 20 is connected, and each second connection The point 112 is connected to one end of each of the second sensing electrode strings 41 of the second electrode group 40. The connection port 11 is used as a connection interface to be connected to an external touch detecting device (not shown).

The first sensing electrode strings 21 of the first electrode group 20 are arranged side by side in the first direction, and each of the first sensing electrode strings 21 has a first end 22 and a second end 23, respectively. The first end of the first sensing electrode string 21 is connected by a wire 24, and the two adjacent first sensing electrodes 211 of the first sensing electrode string 21 are connected by a connecting line 212. The first sensing electrode 211 is surrounded by more than one sensing line 213 to form a first electrode pattern; and the first direction is such that the first end 22 faces the second end 23.

As shown in FIG. 3, the first electrode pattern of the first sensing electrode 211 is surrounded by a sensing line 213 and has an opening 214, that is, the first electrode pattern is a hollow diamond electrode pattern A. The opening 214 is also in the shape of a diamond. As shown in FIG. 4, the first electrode pattern of the first sensing electrode 211 is surrounded by a sensing line 213 to form a diamond-shaped electrode pattern B, and another electrode is formed at the center of the electrode pattern B. A sensing line 213A and two openings 214, the sensing line 213A between the two openings 214 are connected to opposite sides of the peripheral sensing line 213, and the openings 214 are elongated to make the electrode pattern B As shown in FIG. 2, the first electrode pattern of the first sensing electrode 211 is surrounded by a sensing line 213 to form a diamond-shaped electrode pattern C, and is formed at the center of the electrode pattern C. The three sensing lines 213A and the four openings 214 are arranged at equal intervals. The openings 214 are elongated. The sensing lines 213A are connected to opposite sides of the peripheral sensing lines 213, so that the electrode pattern C is As shown in FIG. 5, the first electrode pattern of the first sensing electrode 211 is surrounded by a sensing line 213 to form a diamond-shaped electrode pattern D, and two groups of each are formed at the center of the electrode pattern D. Three sensing lines 213A arranged in parallel at equal intervals, the sensing lines 213A of each group are interlaced with each other, and sixteen openings 214 are formed. The openings 214 are square, and each sensing line 213A is connected to the sensing line of the periphery. The electrode pattern D is connected to each other, and the electrode pattern D is formed in a mesh shape. The electrode pattern AD surrounded by the sensing line 213 is not limited to a diamond shape, and may be circular or polygonal. The present invention is not limited thereto, and the foregoing The shape of each opening 214 may be rhombic, circular or polygonal corresponding to the shape of the electrode pattern, or different from the shape of the electrode pattern, for example, the electrode pattern is a diamond shape, and the opening 214 is a circle or a polygon, and the present invention is No restrictions.

The first electrode group 20, the first sensing electrode string 21, the first sensing electrode 211, the connecting line 212 and the sensing line 213 may be formed by printing, transfer, screen printing or by sputtering. The ratio of the line width of the sensing line 213 to the preferred width of the opening 214 is between 1:1 and 1:10, as shown in FIG. 4, when the line width of the sensing line 213 around the opening 214 is 1 μm. The width of the elongated opening 214 is between 1 μm and 10 μm. The first sensing electrode string 21 described above is made of a transparent electrode (ITO) or a metal wire ( Such as: copper).

Referring to FIG. 2, the insulating layer 30 is insulated to isolate the first electrode group 20 from the second electrode group 40. In the preferred embodiment, the insulating layer 30 is square to cover the second electrode group. 40, the area of the insulating layer 30 may also cover the entire surface of the substrate 10, but the connection port 11 is excluded.

The second sensing electrode strings 41 of the second electrode group 40 are arranged side by side in the second direction, and each of the second sensing electrode strings 41 has a plurality of connected second sensing electrodes 411, and the second sensing electrode string The second direction of the first sensing electrode string 41 intersects with the first direction of the first sensing electrode string 21, and each of the second sensing electrode strings 41 has a first end 42 and a second end 43, respectively, and the first end 42 and the connecting end 11 Each of the second contacts 112 is connected by a wire 44, and the two second sensing electrodes 411 adjacent to the second sensing electrode string 41 are connected by a connecting line 412, and each of the second sensing electrodes 411 corresponds to two. The gap between the adjacent first sensing electrodes 211 and the second sensing electrode 411 exhibiting the appearance of one of the second electrode patterns corresponds to the shape of the first electrode pattern of the first sensing electrode 211, but the second sensing The second electrode pattern of the electrode 411 is different from the first electrode pattern having the opening 214, that is, the second electrode pattern is a solid diamond-shaped sheet resistance pattern; and the second direction is oriented toward the first end 42 thereof. The second end 43 shall prevail. The second electrode group 40, the second sensing electrode string 41 and the second sensing electrode 411 may be formed by printing, transfer, screen printing or by sputtering, and the second sensing electrode 411 The electrode pattern may also be circular or polygonal as the first sensing electrode 211, and the invention is not limited herein. The second sensing electrode string 41 described above is made of a transparent electrode (ITO) or a metal wire (e.g., copper).

Since the first electrode pattern of the first sensing electrode 211 is different from the second electrode pattern of the second sensing electrode 411, respectively, a line resistance pattern and a sheet resistance pattern, and the first electrode pattern of the line resistance type has an opening 214 to increase light. The amount of penetration, thereby improving the transmittance or visibility of the touch panel, solves the problem that the existing touch panel cannot simultaneously take into account both high transmittance and high sensitivity.

Referring to FIG. 6 and FIG. 7 , the first electrode group 20 and the second electrode group 40 are formed on the surface of the substrate 10 and are in the same plane, and the first electrode group 20 is Each of the first sensing electrode strings 21 and the second sensing electrode strings 41 of the second electrode group 40 intersect at right angles. As shown in FIG. 7, the connecting lines 412 of the two adjacent second sensing electrodes 411 are formed by an insulating sheet. 31 isolating the connecting lines 212 and 412 between the first and second sensing electrodes 211 and 411 to form a bridge structure. The insulating sheet 31 is only covered on the connecting line 412 to avoid overlapping or contacting with the connecting line 212. The problem of short circuit. The patterns of the first and second electrode patterns of the first electrode group 20 and the second electrode group 40 are the same as those of the first preferred embodiment.

Regarding the third preferred embodiment of the present invention, referring to FIG. 8, the first electrode group 20 and the second electrode group 40 are respectively formed on the substrate. In the preferred embodiment, the substrate 10 is electrically isolated, that is, the insulating layer 30 is not disposed between the first electrode group 20 and the second electrode group 40. The first contacts 111 of the connection port 11 are disposed on the surface of one end of the substrate 10. The second contacts 112 are disposed on the bottom surface of one end of the substrate 10, and the first contacts 111 and the second connections The points 112 are electrically connected to the first electrode group 20 and the second electrode group 40, respectively. The structure and pattern of the electrode patterns of the first electrode group 20 and the second electrode group 40 are the same as those of the first preferred embodiment.

Referring to FIG. 9 , a second electrode group 40 , an insulating layer 30 and a first electrode group 20 are sequentially disposed on the surface of a substrate 10 to form an electromagnetic system. In the preferred embodiment, the first electrode group 20 includes a plurality of first sensing electrode strings 21 arranged in parallel in a first direction and arranged side by side, and each of the first sensing electrode strings 21 forms a a first electrode pattern having an elongated electrode pattern E and having a plurality of openings 214, the openings 214 being disposed in a length direction of the first sensing electrode string 21, and each of the first sensing electrode strings 21 The two ends are respectively connected to a first end 22 and a second end 23, and the first end 22 and the second end 23 are respectively connected with a wire 24; the second electrode group 40 includes a plurality of channels parallel to the second direction and The second sensing electrode strings 41 are arranged side by side, and the second sensing electrode strings 41 form a second electrode pattern different from the first electrode pattern, that is, the second electrode patterns are elongated but have no openings. Each of the two ends of the second sensing electrode string 41 is a first The first end 42 and the second end 43 are respectively connected with a wire 44; the first direction is that the first end 22 of the first sensing electrode string 21 faces the second end 23, The second direction is based on the first end 42 of the second sensing electrode string 41 facing the second end 43 and the second direction of the second sensing electrode string 41 intersecting the first direction of the first sensing electrode string 21 at right angles.

Referring to FIG. 10 to FIG. 12, the first electrode group 20 and the second electrode group 40 are formed on the surface of the substrate 10 and arranged in parallel and in a phasewise manner. The first sensing electrode string 21 has a first end 22 and a second end 23. The second sensing electrode string 41 has a first end 42 and a second end 43. The first electrode group 20 and the second electrode group The setting direction of 40 is the first end 22, 42 of the first sensing electrode string 21 and the first end of the second sensing electrode string 41, respectively, with the first ends 22, 42 facing the second ends 23, 43 respectively. The ends 42 are respectively located at different ends of the substrate 10, that is, the first end 22 of each of the first sensing electrode strings 21 is adjacent to the second end 43 of the second sensing electrode string 41; and each second sensing The first end 42 of the electrode string 41 is adjacent to the second end 23 of the first inductive electrode string 21.

As shown in FIG. 11 and FIG. 12, each of the first sensing electrode strings 21 has a plurality of connected first sensing electrodes 211, and two adjacent first sensing electrodes 211 are connected by a connecting line 212. The first sensing electrodes 211 are respectively connected. a first electrode pattern or a second electrode pattern, the first sensing electrode 211 is In the case of an electrode pattern, the electrode pattern F having an opening 214 is formed by one or more sensing lines 213. When the first sensing electrode 211 is the second electrode pattern, the first sensing electrode 211 does not have the opening 214 and is solid. As shown, the periphery of the electrode pattern F is square, and an opening 214 is formed at the center thereof. The first end 22 of the first sensing electrode string 21 refers to the left end of the pattern direction, and the second sensing electrode string 41 The first end 42 is the right end of the drawing direction, and the area of each of the first sensing electrode strings 21 is decreased from the first end 22 toward the second end 23, as shown in FIG. The area of the sensing electrode 211 is the largest, and the area of the first sensing electrode 211 adjacent to the right side is slightly reduced. As shown in FIG. 11, the first sensing electrode 211 of the same first sensing electrode string 21 is gradually reduced, and is located closest to The area of the first sensing electrode 211 of the second end 23 is the smallest. In this embodiment, the manner of decreasing the area is such that the width of each of the first sensing electrodes 211 is constant, and the height is decreased. Therefore, the first sensing electrodes 211 of the respective first sensing electrode strings 21 are aligned in the straight direction. Furthermore, the first ends 22 of the first sensing electrode strings 21 are respectively provided with a wire 24, and the wires 24 are respectively connected to the connection port 11 at one end of the substrate 10.

Since the area of the first sensing electrode 211 near the first end 22 is larger and the area close to the second end 23 is smaller, the first electrode pattern having the opening 214 is formed only on the first sensing electrode near the first end 22 . 211, as shown in FIG. 10, taking the length direction of the first sensing electrode string 21 as an example, about one-half of the total length of the first sensing electrode string 21 is a boundary (as shown in FIG. The boundary line X), the first sensing electrode 211 near the first end 22 is formed with a first electrode pattern (ie, a line resistance pattern), and the first sensing electrode 211 near the second end 23 forms a second electrode pattern (ie, a square) The resistance type), therefore, the first sensing electrode string 21 is a sensing electrode having both a line resistance type and a sheet resistance type.

Each of the second sensing electrode strings 41 is arranged on the surface of the substrate 10 and parallel to the first sensing electrode strings 21, and is arranged in parallel with each other. As shown in FIG. 12, each of the second sensing electrode strings 41 has a plurality of connected seconds. The sensing electrode 411 is connected to the two adjacent sensing electrodes 411 by a connecting line 412. The second sensing electrodes 411 are respectively a first electrode pattern or a second electrode pattern, and the second sensing electrode 411 is a first electrode. In the case of a pattern, the electrode pattern F having an opening 414 is surrounded by one or more sensing lines 413. When the second sensing electrode 411 is in the second electrode pattern, it is solid without the opening 414. The area of the second sensing electrode 411 of the second sensing electrode string 41 closest to the first end 42 is the largest, and the area of the second sensing electrode 411 on the left side is slightly reduced. As shown in FIG. 10, the same second sensing electrode string The second sensing electrode 411 on the second end 43 has the smallest area. In this embodiment, the decreasing area is such that the width of each of the second sensing electrodes 411 is constant, and the height is decreased, so each second The second sensing electrodes 411 of the sensing electrode string 41 are respectively aligned in a straight direction. Further, the first ends 42 of the second sensing electrode strings 41 are respectively provided with a wire 44, and the wires 44 are respectively connected to one end of the substrate 10. 11 connections .

Taking the length direction of the second sensing electrode string 41 as an example, about one-half of the total length of the second sensing electrode string 41 is a boundary (as shown by the boundary line x), and the first electrode pattern having the opening 214 (ie, the line) The second sensing electrode 411 adjacent to the second end 43 forms a second electrode pattern (ie, a sheet resistance pattern), and the second sensing electrode string 41 is also formed on the first sensing electrode 411 adjacent to the first end 42. It is an induction electrode having both a line resistance type and a sheet resistance type.

It can be seen from the above that by changing the electrode pattern of the sensing electrode to form a line resistance pattern, the amount of light penetration can be increased to increase the light transmittance, and the thickness thereof can be increased to reduce the resistance value, and the conductivity and the sensing sensitivity can be improved. The problem that the existing touch panel cannot simultaneously consider high transmittance and high sensitivity is solved.

10‧‧‧Substrate

11‧‧‧Links

111‧‧‧First contact

112‧‧‧second junction

20‧‧‧First electrode group

21‧‧‧First induction electrode string

211‧‧‧First sensing electrode

212‧‧‧Connecting line

213, 213A‧‧‧ sensing line

214‧‧‧ openings

22‧‧‧ first end

23‧‧‧ second end

24‧‧‧Wire

30‧‧‧Insulation

40‧‧‧Second electrode group

41‧‧‧Second induction electrode string

411‧‧‧Second sensing electrode

412‧‧‧Connecting line

42‧‧‧ first end

43‧‧‧ second end

44‧‧‧ wire

C‧‧‧electrode pattern

Claims (13)

A sensing electrode structure of a touch panel comprises: a first electrode group comprising a plurality of first sensing electrode strings arranged in parallel in a first direction and arranged side by side, each of the first sensing electrode strings having a plurality of connected a first sensing electrode, each of the first sensing electrodes forms a first electrode pattern, the first electrode pattern has more than one opening; and a second electrode group includes a plurality of channels in parallel and side by side in the second direction a second sensing electrode string, each of the second sensing electrode strings has a plurality of connected second sensing electrodes, each of the second sensing electrodes forms a second electrode pattern different from the first electrode pattern, and the second sensing electrode The second direction of the string intersects the first direction of the first sensing electrode string; wherein the first sensing electrode is surrounded by a sensing line to form a first electrode pattern having an opening, the second electrode pattern having no opening; The first sensing electrode is formed with more than one sensing line in the opening surrounded by the sensing line, and the two ends of the sensing line are connected to the sensing line of the periphery. The sensing electrode structure of the touch panel of claim 1, wherein the electrode patterns of the first sensing electrodes are in a rhombus shape, and the openings are elongated. The sensing electrode structure of the touch panel according to claim 2, wherein the first electrode group and the second electrode group are transparent electrodes (ITO), which are formed by printing, transfer, screen printing or sputtering. A touch panel comprising: a sensing electrode structure, comprising: the first electrode group and the second electrode group according to any one of claims 1 to 3; and a substrate for arranging the sensing electrode structure; The first electrode group and the second electrode group are formed on the surface of the substrate, and the first electrode group and the second electrode group are separated by an insulating layer. The touch panel of claim 4, wherein the first electrode group and the second electrode group are formed on a surface of the substrate, and the adjacent first sensing electrodes of the first sensing electrode strings are connected by a connecting line. The adjacent second sensing electrodes of the two sensing electrode strings are connected by another connecting line, and the intersecting connecting lines are respectively provided with an insulating sheet to form a bridging structure. The touch panel of claim 4, wherein the first electrode group and the second electrode group are respectively formed on a surface and a bottom surface of the substrate. The sensing electrode structure of the touch panel comprises: a first electrode group comprising a plurality of first sensing electrode strings arranged in parallel and arranged side by side, each of the first sensing electrode strings having a plurality of connected first sensing electrodes Each of the first sensing electrodes respectively forms a first electrode pattern or a second electrode pattern, the first electrode pattern has more than one opening, the second electrode pattern has no opening, and a second electrode group The second sensing electrode string has a plurality of parallel sensing electrodes arranged in parallel, and each of the second sensing electrode strings has a plurality of connected second sensing electrodes, and each of the second sensing electrodes respectively forms a first electrode pattern or a second electrode pattern. The first electrode pattern has more than one opening, the second electrode pattern has no opening, and each of the second sensing electrode strings is arranged with each of the first sensing electrode strings; wherein the first sensing electrode string and the first sensing electrode string The two sensing electrode strings respectively have a first end and a second end, and the first sensing electrode string and the first end of each second sensing electrode string are located at different ends, each first A first electrode strings shall end with a second end of the second sensing electrode adjacent string, on which each of the first sensing electrode The area of the second sensing electrode decreases from the first end toward the second end, the first electrode pattern of the first sensing electrode string is formed at one end near the first end, and the first electrode pattern of the second sensing electrode is formed Near the end of the first end. The sensing electrode structure of the touch panel of claim 7, wherein the first sensing electrode string is such that the width of each of the first sensing electrodes is constant, and the height is decreased; and the second sensing electrode string is also used for each second sensing The width of the electrode does not change, but its height is decremented. A touch panel comprising: a substrate having a surface; a sensing electrode structure comprising the first electrode group and the second electrode group according to claim 7 or 8, the first electrode group and a second electrode The formation is formed on the surface of the substrate. A touch panel is mainly provided with a sensing electrode structure on a substrate. The sensing electrode structure comprises: a first electrode group comprising a plurality of first sensing electrode strings arranged in parallel and arranged side by side, each first The sensing electrode string forms a first electrode pattern, the first electrode pattern has a plurality of openings, and a second electrode group includes a plurality of second sensing electrodes arranged side by side with each of the first sensing electrode strings The second sensing electrode string forms a second electrode pattern different from the first electrode pattern, and each of the first sensing electrode strings intersects each of the second sensing electrode strings at right angles; wherein the first electrode group and the first electrode group The second electrode group is formed on the same surface of the substrate, and isolates the first electrode group and the second electrode group by an insulating layer. The touch panel of claim 10, wherein the first electrode group and the second electrode group are respectively formed on a surface and a bottom surface of the substrate. The touch panel of claim 10, wherein the first sensing electrode string is surrounded by a plurality of sensing lines into a first electrode pattern having the openings. The touch panel of claim 10, wherein the first electrode pattern of the first sensing electrode string is elongated.