TW202004468A - Mutual capacitive touch panel - Google Patents

Abstract

A mutual capacitive touch panel includes a first electrode layer and a second electrode layer. The first electrode layer includes a plurality of first electrode series and a plurality of second electrode series. The second electrode layer includes a plurality of electrode strips, and each electrode strip crosses the first electrode series and the second electrode series. Each first electrode series includes a plurality of first electrodes and a plurality of second electrodes, electrically connected to each other, and each first electrode and a corresponding one of the second electrodes are disposed abreast and form an electrode set. Each second electrode series include a plurality of third electrodes electrically connected to each other, and each electrode set and each third electrode are arranged alternately along a direction.

Description

Mutual capacitance touch panel

The invention relates to a mutual-capacity touch panel, in particular to a mutual-capacity touch panel with a double-layer electrode structure.

The touch display device composed of a display and a touch panel has been widely used in smart phones and satellite navigation systems (GPS) because it can realize both touch and display functions and has the characteristics of human-computer interaction. navigator system), tablet PCs and laptop PCs. Among them, due to the advantages of high accuracy, multi-touch, high durability, and high touch resolution, mutual-capacitive touch panels have become the mainstream touch technology currently used in the industry.

In terms of structural design, mutual capacitance touch technology can be divided into two types: single-layer electrode structure and double-layer electrode structure. Since the double-layer electrode structure is simpler in structure design and control algorithm than the single-layer electrode structure, the double-layer electrode structure is generally used in middle-to-high-end consumer electronic products. Please refer to FIG. 1, which shows a schematic top view of a conventional double-layer electrode structure touch panel with a narrow peripheral area. In the touch panel 10, the drive strings in the same row are divided into two drive strings ES, and two adjacent sensing strings EL are electrically connected to each other. Thereby, the touch panel 10 has fewer wires connected to the sensing series EL, and narrower horizontal peripheral areas on both sides. When actually manufacturing the touch panel 10, the induction tandem EL is made on one film, and the driving tandem ES is made on another film. Therefore, the film formed with the induction series EL and the film formed with the drive series ES need to be pasted through optical glue, and then pasted on a supporting substrate (such as a glass substrate) through another optical glue.

When the touch panel 10 of the above design is applied to a bendable display device, since a thin film and an optical glue are provided between the sensing series EL and the driving series ES, the total thickness thereof may be, for example, 100 microns or more. This makes the difference between the outer diameter of the sensing string EL and the inner diameter of the driving string ES (the touch panel 10 is bent toward the driving string ES side) or the inner diameter of the sensing string EL and driving when bending the touch panel 10 The difference in the outer diameter of the tandem ES (the touch panel 10 is bent toward the side of the induction tandem EL) will be too large, that is, the induction tandem EL and the drive tandem ES will be subjected to excessive stress, resulting in the induction tandem EL and the drive tandem ES is easily broken.

Although the insulation thickness between the induction series EL and the drive series ES can be reduced, for example, the thin film and the optical film between the two are replaced with an insulation layer. However, as the distance between the sensing serial EL and the driving serial ES decreases, the background capacitance between the sensing serial EL and the driving serial ES increases, so that it is used to amplify the sensing signal sensed by the sensing serial EL The output of the amplifier is easily saturated, which affects the detection quality of the touch panel.

One of the objectives of the present invention is to provide a mutual-capacity touch panel to reduce the background capacitance, thereby improving touch detection quality.

An embodiment of the present invention provides a mutual-capacity touch panel, which includes a first electrode layer, a second electrode layer, and an insulating layer. The first electrode layer includes a plurality of first electrode strings and a plurality of second electrode strings, each extending along a first direction, and each first electrode string corresponds to a second electrode string. The second electrode layer is disposed on the first electrode layer. The second electrode layer includes a plurality of electrode strips respectively extending along a second direction, and each electrode strip spans the first electrode series and the second electrode series. The insulating layer is disposed between the first electrode layer and the second electrode layer. Each first electrode series includes a plurality of first electrodes and a plurality of second electrodes. In each first electrode series, each first electrode is electrically connected to each second electrode, and each first electrode is connected to a corresponding one The second electrodes are arranged side by side and constitute an electrode group. Each second electrode series includes a plurality of third electrodes electrically connected to each other, each electrode group and each third electrode are alternately arranged along the first direction, and each electrode strip overlaps adjacent to each other in a vertical projection direction An electrode group and a third electrode.

Another embodiment of the present invention provides a mutual-capacitive touch panel, which includes a first electrode layer, a second electrode layer, and an insulating layer. The first electrode layer includes a plurality of first electrode strings and a plurality of second electrode strings, each extending along a first direction, and each first electrode string corresponds to a second electrode string, wherein each first electrode The series includes a plurality of first electrodes and a plurality of first connection line segments. The first electrodes are electrically connected to each other through the first connection line segment. Each second electrode series includes a plurality of second electrodes and a plurality of second connection line segments. The two electrodes are electrically connected to each other through the second connection line segment, the first electrode and the second electrode are arranged in an array, and each of the first electrodes of one of the first electrode series and the corresponding one of the second electrode series The second electrodes are alternately arranged along the first direction. The second electrode layer is disposed on the first electrode layer. The second electrode layer includes a plurality of curved electrode strips respectively extending along a second direction, wherein each curved electrode strip spans the first electrode series and the second electrode series And each curved electrode strip overlaps the first electrode and the second electrode in two adjacent columns in a vertical projection direction. The insulating layer is disposed between the first electrode layer and the second electrode layer.

In the mutual-capacitive touch panel of the present invention, the first connection line segment and the second connection line segment are avoided by the curved electrode strips, which not only avoids the coupling between each curved electrode strip and the first connection line segment and the second connection line segment The capacitance reduces the touch accuracy, and also reduces the background capacitance of each sensing unit to improve the quality of touch detection. Moreover, the first electrode and the second electrode are arranged side by side, and the third connecting line segment connecting the third electrode is arranged between the first electrode and the second electrode side by side, which can avoid the bending of the electrode strip extending to two adjacent first electrodes Between the first connection line segment and the second connection line segment in the series, thereby reducing the distance between two adjacent first electrode series. Furthermore, by disposing each electrode strip in the gap between the adjacent electrode group and the third electrode, not only can each electrode strip be designed in a strip shape, thereby reducing the difference in impedance between the two ends of each electrode strip, In addition, the sensing signal judgment error is avoided, and the coupling capacitance between each electrode strip and the electrode group and the third electrode can be reduced, thereby reducing the background capacitance of the mutual capacitance touch panel.

In order to enable those skilled in the art to further understand the present invention, the embodiments of the present invention are specifically enumerated below, and the constitutional content of the present invention and the desired effects are described in detail with reference to the drawings. It should be noted that the drawings are simplified schematic diagrams. Therefore, only the components and combinations related to the present invention are shown to provide a clearer description of the basic architecture of the present invention, and the actual components and layout may be more complicated. In addition, for the convenience of explanation, the elements shown in the drawings of the present invention are not drawn in proportions such as the actual number, shape, and size, and the detailed proportions can be adjusted according to the design requirements.

Please refer to FIG. 2, which is a schematic cross-sectional view of the mutual-capacitive touch panel according to the first embodiment of the present invention. The mutual-capacitive touch panel 100 is used to detect the position where the touch object touches, and includes a first electrode layer C1, a second electrode layer C2 and an insulating layer IN1, wherein the insulating layer IN1 is disposed on the first electrode layer C1 and the first Between the two electrode layers C2, the first electrode layer C1 and the second electrode layer C2 can be electrically insulated from each other through the insulating layer IN1 disposed therebetween, and the second electrode layer C2 is adjacent to the first electrode layer C1 for input commands Touch object. The touch object may be, for example, a finger or a stylus. In this embodiment, the mutual-capacitive touch panel 100 may further include a substrate 102, and the second electrode layer C2, the insulating layer IN1 and the first electrode layer C1 are sequentially formed on the same first side of the substrate 102, wherein the substrate The second side of 102 relative to the first side is the side close to the touch object. The first electrode layer C1 and the second electrode layer C2 may be formed of transparent conductive materials, which may include, for example, indium tin oxide (ITO), indium zinc oxide (IZO), and antimony oxide Antimony tin oxide (ATO), antimony zinc oxide (AZO), nano silver or other suitable transparent conductive materials. The thicknesses of the first electrode layer C1 and the second electrode layer C2 may be less than 1 micrometer, for example. The insulating layer IN1 may be formed of an insulating material, and the insulating material may include, for example, silicon oxide, silicon nitride, or other suitable insulating materials. The thickness of the insulating layer IN1 may be, for example, 1.2 μm to 30 μm. Since the first electrode layer C1 and the second electrode layer C2 of this embodiment can be in contact with the upper surface and the lower surface of the insulating layer IN1, respectively, the insulating layer IN1 can be used as a space between the first electrode layer C1 and the second electrode layer C2 Dielectric layer of the coupling capacitor. Compared with the dielectric layer composed of thin film and optical glue in the conventional touch panel, the thickness of the insulating layer IN1 as the dielectric layer in this embodiment is thinner, so the second electrode layer C2 and the first electrode layer can be reduced The spacing between C1. When bending the mutual capacitance touch panel 100, the difference between the outer diameter of the first electrode layer C1 and the inner diameter of the second electrode layer C2 (the touch panel is bent toward the second electrode layer C2 side) or the difference between the first electrode layer C1 The difference between the inner diameter and the outer diameter of the second electrode layer C2 (the touch panel is curved toward the first electrode layer C1 side) can be reduced, thereby slowing down the bending of the first electrode layer C1 and the second electrode layer C2 caused by the touch panel The stress received thereby avoids the breakage of the first electrode layer C1 and the second electrode layer C2. In this embodiment, the substrate 102 may be, for example, a flexible substrate, such as polyimide (PI), polyethylene terephthalate (PET), or thin glass substrate. In some embodiments, the substrate may also be a hard substrate, such as a glass substrate, a strengthened glass substrate, a plastic substrate, a quartz substrate, or a sapphire substrate.

In this embodiment, the mutual-capacitive touch panel 100 may further include a protective layer 104, an adhesive layer 106, and a cover plate 108, wherein the protective layer 104 may be formed and covered on the second electrode layer C2 for protection The first electrode layer C1, the insulating layer IN1 and the second electrode layer C2, and the adhesive layer 106 is used to adhere the substrate 102 formed with the protective layer 104, the first electrode layer C1, the insulating layer IN1 and the second electrode layer C2 to the cover On board 108. In some embodiments, the mutual-capacitive touch panel 100 may be further adhered to the display device 112 through an adhesive layer 110, but the invention is not limited thereto. In another embodiment, the first electrode layer, the insulating layer and the second electrode layer can also be directly formed on the display surface of the display device in sequence, such as the color filter substrate of the liquid crystal display panel or the packaging cover of the organic light emitting display panel On the board, and a cover board is provided on the second electrode layer.

The stacking structure of the mutual-capacity touch panel of the present invention is not limited to this. Please refer to FIG. 3, which is a schematic cross-sectional view of a mutual-capacitive touch panel according to a second embodiment of the present invention. The difference between the mutual-capacitive touch panel 200 provided in this embodiment and the first embodiment shown in FIG. 2 is that the first electrode layer C1 and the second electrode layer C2 in this embodiment can be formed on the substrate respectively On 202 and 204, the substrate 202 provided with the first electrode layer C1 and the substrate 204 provided with the second electrode layer C2 are bonded through the two adhesive layers 206, 208, and the cover plate 108 is provided with the second electrode layer C2 The substrate 204 is bonded to form a mutual-capacitive touch panel 200. In this embodiment, the substrate 204 and the adhesive layer 206 between the first electrode layer C1 and the second electrode layer C2 constitute an insulating layer IN2 for isolating the first electrode layer C1 and the second electrode layer C2. The thickness of the adhesive layer 206 can be, for example, substantially 20 microns, and the thickness of the substrate 204 can be, for example, substantially 25 microns.

Please refer to FIG. 4, which is a schematic cross-sectional view of a mutual-capacitive touch panel according to a third embodiment of the present invention. The difference between the mutual-capacitive touch panel 300 provided in this embodiment and the first embodiment shown in FIG. 3 is that the first electrode layer C1 and the second electrode layer C2 in this embodiment can be formed on the same The upper surface and the lower surface of the substrate 302. That is, the substrate 302 may constitute an insulating layer IN3 that isolates the first electrode layer C1 and the second electrode layer C2.

The above embodiment adopts a thin stack structure of the insulating layer between the first electrode layer and the second electrode layer, which will inevitably have a larger background capacitance, and there is a redesign of the first electrode shape of the first electrode layer and the second electrode layer. The shape of the second electrode is necessary. The top-down design of the mutual-capacitive touch panel of the present invention will be further described below. Please refer to FIG. 5, which illustrates a schematic top view of a mutual-capacitive touch panel according to a fourth embodiment of the present invention. In the mutual capacitance touch panel 400 provided in this embodiment, the first electrode layer C11 includes a plurality of first electrode strings ES1 separated and insulated from each other and a plurality of second electrode strings ES2 separated and insulated from each other, Each extends along a first direction D1, and the second electrode layer C12 includes a plurality of curved electrode strips EL1, which respectively extend along a second direction D2 in a curved manner and span the first electrode series ES1 and the second electrode Tandem ES2. By bending the electrode strip EL1 across the first electrode series ES1 and the second electrode series ES2, a plurality of sensing units SU1 arranged in an array can be formed to detect the position of the touch object. Each first electrode string ES1 corresponds to one of the second electrode strings ES2, so that a first electrode string ES1 and a second electrode string ES2 corresponding to each other can be used to form the sensing units SU1 located in the same row.

In this embodiment, each first electrode series ES1 includes a plurality of first electrodes E11 and a plurality of first connection line segments CS11, and each second electrode series ES2 includes a plurality of second electrodes E12 and a plurality of second connections Line segment CS12. In addition, the first electrode E11 and the second electrode E12 are arranged in an array, and the first electrode E11 is located in an odd column, and the second electrode E12 is located in an even column. Therefore, in each row of the array, each first electrode E11 and each second electrode E12 is alternately arranged in sequence. Moreover, the first electrodes E11 in the same row are connected in series to form a first electrode series ES1 through the first connecting line segment CS11, and the second electrodes E12 in the same row are connected in series to form a second electrode series ES2 through the second connecting line segment CS12. In this embodiment, the row direction of the array may be the first direction D1, and the column direction of the array may be the second direction D2, but it is not limited thereto.

In this embodiment, the first connection line segment CS11 and the second connection line segment CS12 corresponding to the same row of the first electrode E11 and the second electrode E12 are disposed on both sides of the same row of the first electrode E11 and the second electrode E12, for example, respectively Set on the left side and the right side or the opposite side, whereby the first connection line segment CS11 and the second connection line segment CS12 can be staggered to form the first connection line segment CS11 electrically connected to the same row of the first electrode E11 in the same first electrode layer C11 The second connection line segment CS12 electrically connected to the second electrode E12 in the same row, and the first electrode series ES1 and the second electrode series ES2 formed by the first electrode layer C11 can be insulated from each other.

In addition, although the curved electrode strips EL1 of the second electrode layer C12 extend along the second direction D2 and span the first electrode series ES1 and the second electrode series ES2, the curved electrode strips EL1 avoid the first connection The line segment CS11 and the second connection line segment CS12 are superposed on the first electrode E11 and the second electrode E12 in two adjacent columns in a vertical projection direction V, so that each curved electrode strip EL1 can be connected to an adjacent first electrode E11 and a second electrode E12 are coupled to form two sensing units SU1 arranged in the first direction D1, wherein the vertical projection direction V may be, for example, a direction perpendicular to the surface of the substrate on which the first electrode layer C11 is disposed. In other words, each curved electrode strip EL1 does not overlap the first connection line segment CS11 and the second connection line segment CS12 in the vertical projection direction V. Since the mutual-capacitive touch panel 400 does not have an additional coupling capacitance between the electrode strip and the first connection line segment CS11 and the second connection line segment CS12 due to the overlap in the vertical projection direction V, it will not cause misjudgment and reduce the touch accuracy . By reducing the coupling capacitance between each curved electrode strip EL1 and the first connection line segment CS11 and the second connection line segment CS12, the background capacitance of each sensing unit SU1 of the mutual capacitive touch panel 400 can be further reduced.

Specifically, each curved electrode strip EL1 may include a plurality of first line segments S11, a plurality of second line segments S12, a plurality of third line segments S13, and a plurality of fourth line segments S14, which are alternately connected in sequence. In each curved electrode strip EL1, the first line segment S11 extends from one side (for example, the left side) of the first electrode E11 and the second electrode E12 in the same row to overlap the second electrode E12. Since the first line segment S11 extends from between two adjacent second connecting line segments CS12 to overlap the second electrode E12, each curved electrode strip EL1 can avoid the second connecting line segment CS12. The second line segment S12 connected to the first line segment S11 overlaps the second electrode E12 and extends to overlap the first electrode E11 adjacent to the second electrode E12. The first line segment S11 and the second line segment S12 may be coupled with the corresponding second electrode E12 to form a sensing unit SU1. The third line segment S13 connected to the second line segment S12 overlaps the first electrode E11 and extends to the other side (for example, the right side) of the first electrode E11 and the second electrode E12 in the same row. The second line segment S12 and the third line segment S13 may be coupled with the corresponding first electrode E11 to form another sensing unit SU1. The fourth line segment S14 connected to the third line segment S13 extends between the adjacent first connection line segment CS11 and the second connection line segment CS12 corresponding to different rows. Through the U-shaped line segment U1 formed by the second line segment S12, the third line segment S13, and the fourth line segment S14, each curved electrode strip EL1 can avoid the second connection line segment CS12. In this embodiment, each first line segment S11 and each third line segment S13 extend parallel to the second direction D2, and each second line segment S12 and each fourth line segment S14 extend parallel to the first direction D1, but not limited to this .

In this embodiment, each first electrode E11 and each second electrode E12 may optionally include an opening OP1, so that each curved electrode strip EL1 and each first electrode E11 and each second electrode E12 are in the vertical projection direction V The overlapping area is reduced, thereby further reducing the background capacitance of each sensing unit SU1 of the mutual capacitive touch panel 400. In another embodiment, the first electrode and the second electrode may not have openings. In addition, the stacked structure of the first electrode layer C11, the insulating layer, and the second electrode layer C12 of this embodiment can be applied to the first embodiment shown in FIG. 2, the second embodiment shown in FIG. 3, and the fourth Any one of the third embodiments shown in the figure.

Please refer to FIG. 6, which illustrates a schematic top view of a mutual-capacitive touch panel according to a fifth embodiment of the present invention. The difference between the mutual-capacitive touch panel 500 provided in this embodiment and the fourth embodiment shown in FIG. 5 is that the first electrode E21 in the same row of this embodiment overlaps two adjacent curved electrodes In the strip EL2, the second electrode E22 in the same row will also overlap two adjacent curved electrode strips EL2, and each curved electrode strip EL2 will overlap the first electrode E21 and the second electrode E22 in two adjacent columns. Effectively improve the touch accuracy in the row direction (first direction D1). Specifically, the curved electrode strip EL2 may include a plurality of first curved electrode strips EL2a and a plurality of second curved electrode strips EL2b, each first curved electrode strip EL2a and each second curved electrode strip EL2b alternate along the first direction D1 The first curved electrode strip EL2a and the second curved electrode strip EL2b adjacent to each other are arranged symmetrically to the second direction D2. Each first curved electrode strip EL2a and each second curved electrode strip EL2b respectively include a plurality of first line segments S21 and a plurality of U-shaped line segments U2, which are alternately connected in sequence. The first line segments S1 of the first curved electrode strip EL1a and the second curved electrode strip EL2 adjacent to each other extend from one side (for example, the left side) of the first electrode E21 and the second electrode E22 in the same row to overlap the same second The electrode E22, and the U-shaped line segment U2 of the first curved electrode strip EL1a and the second curved electrode strip EL2 adjacent to each other are symmetrical to the second direction D2 and extend to overlap the two adjacent to the second electrode E22 respectively The first electrode E21 extends to the other side (for example, the right side) of the first electrode E21 and the second electrode E22 in the same row, and extends between the first connection line segment CS21 and the second connection line segment CS22 corresponding to different rows. That is to say, through the U-shaped line segments U2 symmetrical to each other, the first curved electrode strip EL2a and the second curved electrode strip EL2b overlapping the second electrode E22 in the same row can avoid the first connecting line segment CS21, so as to reduce the mutual The purpose of the background capacitance of each sensing unit SU2 of the capacitive touch panel 500.

In this embodiment, although the first electrodes E21 and the second electrodes E22 are still arranged in an array, the width of each first electrode E21 in the first row in the first direction D1 is smaller than that of the first electrodes E21 in the other rows. The width in the first direction D1, so the first electrode E21 of the first row overlaps only one first curved electrode strip EL2a, and the first electrode E21 of the other row overlaps the adjacent first curved electrode strip EL2a and the second Two curved electrode strips EL2b, and the width of each second electrode E22 of the last row in the first direction D1 is smaller than the width of each second electrode E22 of the other row in the first direction D1, so that the second electrode E22 of the last row only If it overlaps with one second curved electrode strip EL2b, the second electrodes E22 of the other columns overlap with the adjacent first curved electrode strip EL2a and second curved electrode strip EL2b. In this embodiment, each first electrode E21 in the first column can be coupled with the corresponding first curved electrode strip EL2a to form a sensing unit SU2, and the second electrode E22 in the last column can be coupled with the corresponding second curved electrode strip EL2b A sensing unit SU2 is formed, and each first electrode E21 of the other column can be coupled with the corresponding first curved electrode strip EL2a and second curved electrode strip EL2b to form two sensing units SU2, and each second electrode E22 of the other column can be connected to The corresponding first curved electrode strip EL2a and the second curved electrode strip EL2b are coupled to form two sensing units SU2.

In this embodiment, each first electrode E21 and each second electrode E22 may optionally include an opening OP2 to reduce the overlapping area of the curved electrode strip EL2 and the electrode string, thereby reducing the background capacitance. Specifically, each first electrode E21 in the first row and each second electrode E22 in the last row respectively have an opening OP2 that overlaps the corresponding first curved electrode strip EL2a and second curved electrode strip EL2b, respectively. Each of the first electrodes E21 and the second electrodes E22 of the other columns may have two openings OP2 respectively overlapping the corresponding first curved electrode strip EL2a and second curved electrode strip EL2b. Through the arrangement of the opening OP2, the overlapping area of each curved electrode strip EL2, each first electrode E21, and each second electrode 2E2 in the vertical projection direction V is reduced, thereby further reducing the background capacitance of the mutual capacitive touch panel 500. In another embodiment, each first electrode and each second electrode may not have openings. The stack structure of the first electrode layer C21, the insulating layer and the second electrode layer C22 of this embodiment can be applied to the first embodiment shown in FIG. 2, the second embodiment shown in FIG. 3 and the position shown in FIG. 4 Any of the third embodiment shown.

Please refer to FIG. 7, which illustrates a schematic top view of a mutual-capacitive touch panel according to a sixth embodiment of the present invention. In the mutual-capacitive touch panel 600 provided in this embodiment, the first electrode layer C31 includes a plurality of first electrode strings ES1 and a plurality of second electrode strings ES2, each extending along the first direction D1, and Each first electrode series ES1 corresponds to a second electrode series ES2. Each first electrode series ES1 includes a plurality of first electrodes E31 and a plurality of second electrodes E32, which are disposed in the touch area 600a of the mutual capacitive touch panel 600, and in each first electrode series ES1, each The first electrode E31 is electrically connected to each second electrode E32, and each first electrode E31 is disposed side by side with a corresponding second electrode E32 and forms an electrode group EM3. Each second electrode series ES2 includes a plurality of third electrodes E33 electrically connected to each other, and is disposed in the touch area 600 a of the mutual-capacitive touch panel 600. In the first electrode series ES1 and the second electrode series ES2 corresponding to each other, each electrode group EM3 and each third electrode E33 are alternately arranged along the first direction D1. That is to say, the electrode group EM3 and the third electrode E33 are arranged in an array, and the electrode group is located in an odd column, and the third electrode E33 is located in an even column. Specifically, each first electrode series ES1 further includes a plurality of first connection line segments CS31 and a plurality of second connection line segments CS32, which are disposed in the touch area 600a of the mutual capacitive touch panel 600, and each first connection The line segments CS31 are respectively connected between two adjacent first electrodes E31 to electrically connect the first electrodes E31 of the same first electrode series ES1 into a sub-series, and the second connecting line segments CS32 are respectively connected to The two adjacent second electrodes E32 are used to electrically connect the second electrodes E32 of the same first electrode series ES1 into another sub-series. Each second electrode series ES2 further includes a plurality of third connection line segments CS33, which are disposed in the touch area 600a of the mutual capacitive touch panel 600, and are respectively connected between two adjacent third electrodes E33, and each The third connection line segments CS33 are respectively provided between the first electrode E31 and the second electrode E32 arranged side by side. In other words, each third connection line segment CS33 penetrates each electrode group EM3 to electrically connect the third electrodes E33 of each second electrode series ES2. In order to separate the first connection line segment CS31, the second connection line segment CS32 and the third connection line segment CS33 from each other and formed by the same first electrode layer C31, the first connection line segment CS31 and the second connection line segment of each first electrode series ES1 CS32 is respectively disposed on two opposite sides of the corresponding second electrode series ES2, so the two sub-series of each first electrode series ES1 are respectively located on the two opposite sides of the corresponding second electrode series ES2.

In order to electrically connect the two sub-strings of each first electrode string ES1, each first electrode string ES1 further includes at least one connecting line CL, which is disposed on at least one end of the second electrode string ES2. The first connection line segment CS31 and the second connection line segment CS32 adjacent to one end of the second electrode series ES2 in each first electrode series ES1 can be electrically connected to each other through the connection line CL, thereby being located on the side of the second electrode series ES2 ( The first electrode E31 of the sub-series in the left side) can be electrically connected to the second electrode E32 of the sub-series in the other side (right side) of the second electrode series ES2. In this embodiment, the connection line CL may be disposed in the peripheral area 600b of the mutual capacitive touch panel 600, and the connection line CL may be formed by the first electrode layer C31 used to form the first electrode series ES1 or by The first electrode layer C31 is formed of a different conductive layer.

The second electrode layer C32 of this embodiment includes a plurality of curved electrode strips EL3, and each curved electrode strip EL3 spans the first electrode series ES1 and the second electrode series ES2 to form a plurality of sensing units SU3 arranged in an array . Specifically, each curved electrode strip EL3 includes a plurality of first line segments S31, a plurality of second line segments S32, and a plurality of U-shaped line segments U3, wherein each first line segment S31, each U-shaped line segment U3, and each second line segment S32 They are alternately connected in sequence, that is, the first line segment S31 and the second line segment S32 are respectively connected to both ends of the same U-shaped line segment U3. In each curved electrode strip EL3, the first line segment S31 extends from one side (eg, the left side) of the electrode group EM3 of the first electrode series ES1 to overlap with a first electrode E31. The U-shaped line segment U3 connected to the first line segment S31 overlaps the first electrode E31 and extends to overlap with the third electrode E33 adjacent to the first electrode E31, and further extends to overlap with the first electrode E31 side by side Therefore, the U-shaped line segment U3 can overlap the electrode group EM3 and the third electrode E33 adjacent to each other without overlapping the third connection line segment CS33. The second line segment S32 connected to the U-shaped line segment U3 overlaps the second electrode E32 and extends to the other side (for example, the right side) of the electrode group EM3 of the first electrode series ES1. The first line segment S31, part of the U-shaped line segment U3 and the second line segment S32 can be coupled with the corresponding electrode group EM3 to form an induction unit SU3, and the U-shaped line segment U3 can be coupled with the corresponding third electrode E33 to form another induction unit SU3 . Through this configuration, each bent electrode strip EL3 can avoid the first connection line segment CS31, the second connection line segment CS32 and the third connection line segment CS33, and does not overlap the first connection line segment CS31, the second connection line segment CS32 and the third connection line segment CS33, thereby reducing the coupling capacitance between the curved electrode strip EL3 and the first connection line segment CS31, the second connection line segment CS32, and the third connection line segment CS33, thereby reducing the background capacitance of the mutual capacitive touch panel 600. In this embodiment, the U-shaped line segment U3 may include two third line segments S33 disposed along the first direction D1 and a fourth line segment S34 disposed along the second direction D2, and the third line segments S33 are respectively connected to the fourth Both ends of the line segment S34. In addition, each first line segment S31 and each second line segment S32 may extend parallel to the second direction D2, but is not limited thereto.

It is worth mentioning that, according to the fourth embodiment shown in FIG. 5 and the fifth embodiment shown in FIG. 6 of the mutual-capacitive touch panels 400 and 500, since the fourth line segment needs to be set in a corresponding different line and Between the adjacent first connection line segment and the second connection line segment, in order to reduce the coupling capacitance of the fourth line segment and the first connection line segment and the second connection line segment, the gap between two adjacent rows needs to have a certain width. However, in the mutual-capacitive touch panel 600 of this embodiment, since the third connection line segment CS33 is located between the first electrode E31 and the second electrode E32 side by side, the U-shaped line segment U3 of the curved electrode strip EL3 can be designed as Two adjacent electrode groups EM3 overlap the third electrode E33. In this way, the curved electrode strip EL3 does not need to extend between the first connection line segment CS31 and the second connection line segment CS32 adjacent to each other in the two adjacent first electrode series, thereby reducing the two adjacent first electrode series ES1 The spacing between.

In addition, each first electrode E31 of this embodiment may optionally include a first opening OP31, each second electrode E32 may optionally include a second opening OP32, and each third electrode E33 may optionally include a third opening OP33 and a fourth opening OP34 are arranged side by side in the second direction D2. Each first opening OP31 and each third opening OP33 are alternately arranged in the first direction D1, and each second opening OP32 and each fourth opening OP34 are alternately arranged in the first direction D1. Through the arrangement of the openings, the overlapping area of each curved electrode strip EL3 and each of the first electrode E31, each second electrode E32, and each third electrode E33 in the vertical projection direction V is reduced, thereby further reducing the mutual capacitive touch panel 600 background capacitance. In another embodiment, each first electrode, each second electrode, and each third electrode may not have openings. The stack structure of the first electrode layer C31, the insulating layer and the second electrode layer C32 of this embodiment can be applied to the first embodiment shown in FIG. 2, the second embodiment shown in FIG. 3 and the embodiment shown in FIG. 4. Any of the third embodiment shown.

Please refer to FIG. 8, which illustrates a schematic top view of a mutual-capacitive touch panel according to a seventh embodiment of the present invention. The difference between the mutual-capacitive touch panel 700 provided in this embodiment and the sixth embodiment shown in FIG. 7 is that the electrode group EM4 in the same row of this embodiment overlaps two adjacent curved electrode strips EL4, the third electrode E43 in the same row will also overlap two adjacent curved electrode strips EL4, and each curved electrode strip EL4 will overlap the electrode group EM4 and the third electrode E43 in two adjacent columns, thereby effectively improving Touch accuracy in the row direction (first direction D1). Each curved electrode strip EL4 of this embodiment may be coupled to a part of an electrode group EM4 and a part of a third electrode E43 to form two sensing units SU4. Specifically, the curved electrode strip EL4 may include a plurality of first curved electrode strips EL4a and a plurality of second curved electrode strips EL4b, each first curved electrode strip EL4a and each second curved electrode strip EL4b alternate along the first direction D1 The first curved electrode strip EL4a and the second curved electrode strip EL4b adjacent to each other are arranged symmetrically to the second direction D2. Each first curved electrode strip EL4a and each second curved electrode strip EL4b respectively include a plurality of first line segments S41, a plurality of second line segments S42, and a plurality of U-shaped line segments U4, which are alternately connected in sequence. In each of the first curved electrode strips EL4a and the second curved electrode strips EL4b, each first line segment S41 extends from one side (eg, the left side) of the corresponding first electrode series ES1 to overlap the different first electrodes E41 , Each U-shaped line segment U4 overlaps the corresponding first electrode E41, and extends to overlap the corresponding third electrode E43, and further extends to overlap the corresponding second electrode E42, and each second line segment S42 overlaps the corresponding The second electrode E42 extends to the other side (for example, the right side) of the first electrode series ES1. Moreover, the U-shaped line segments U4 of the two adjacent first curved electrode strips EL4a and second curved electrode strips EL4b corresponding to the same second electrode series ES2 overlap the same third electrode E43, and overlap different electrode groups EM4.

In this embodiment, although the electrode group EM4 and the third electrode E43 are arranged in an array, the width of the first electrode E41 and the second electrode E42 of the first row in the first direction D1 is smaller than that of the other rows The width of one electrode E41 and each second electrode E42 in the first direction D1, therefore, the electrode group EM4 of the first row overlaps only one first curved electrode strip EL4a, and the electrode group EM4 of the other rows overlaps the adjacent ones The first curved electrode strip EL4a and the second curved electrode strip EL4b, and the width of each third electrode E43 of the last column in the first direction D1 is smaller than the width of each third electrode E43 of the other columns in the first direction D1, so that The third electrode E43 in the last row overlaps only one second curved electrode strip EL4b, and the third electrode E43 in the other row overlaps the adjacent first curved electrode strip EL4a and second curved electrode strip EL4b. In this embodiment, each electrode group EM4 in the first column can be coupled with the corresponding first curved electrode strip EL4a to form a sensing unit SU4, and the third electrode E43 in the last column can be coupled with the corresponding second curved electrode strip EL4b to form A sensing unit SU4, each electrode group EM4 of the other column can be coupled with the corresponding first curved electrode strip EL4a and the second curved electrode strip EL4b to form two sensing units SU4, and each third electrode E43 of the other column can correspond to the corresponding The first curved electrode strip EL4a and the second curved electrode strip EL4b are coupled to form two sensing units SU4.

In this embodiment, the width of each first opening OP41 and each second opening OP42 in the first direction D1 in the first row will also be smaller than the width of each first opening OP41 and each second opening OP42 in the other direction in the first direction D1 And each of the first openings OP41 and the second openings OP42 of the other columns overlaps the adjacent first curved electrode strip EL4a and second curved electrode strip EL4b. The width of each third opening OP43 and each fourth opening OP44 in the last row in the first direction D1 will also be smaller than the width of each third opening OP43 and each fourth opening OP44 in the other row in the first direction D1, so that the other Each third opening OP43 and each fourth opening OP44 of the column overlap the adjacent first curved electrode strip EL4a and second curved electrode strip EL4b. In another embodiment, each first electrode, each second electrode, and each third electrode may not have openings. The stacked structure of the first electrode layer C41, the insulating layer and the second electrode layer C42 of this embodiment can be applied to the first embodiment shown in FIG. 2, the second embodiment shown in FIG. 3 and the position shown in FIG. 4 Any of the third embodiment shown.

Please refer to FIG. 9, which illustrates a schematic top view of a mutual-capacitive touch panel according to an eighth embodiment of the present invention. The difference between the mutual-capacitive touch panel 800 provided in this embodiment and the seventh embodiment shown in FIG. 8 is that the first electrode E51 in the first electrode layer C51 in this embodiment that is not the first column It may include two first openings OP51, the second electrode E52 that is not the first column may include two second openings OP52, and the third electrode E53 that is not the last column may include two third openings OP53 and two fourth openings OP54, wherein the third opening OP53 and the fourth opening OP54 are separated from each other. Except for the first electrode E51 in the first column and the second electrode E52 in the last column, every two first openings OP51 and every two third openings OP53 are alternately arranged along the first direction D1, and every two second openings The openings OP52 and every two fourth openings OP54 are alternately arranged along the first direction D1. In other words, each sensing unit SU5 of this embodiment includes two side-by-side openings. The stack structure of the first electrode layer C51, the insulating layer and the second electrode layer C52 of this embodiment can be applied to the first embodiment shown in FIG. 2, the second embodiment shown in FIG. 3 and the position shown in FIG. 4 Any of the third embodiment shown.

Please refer to FIG. 10, which illustrates a schematic top view of a mutual-capacitive touch panel according to a ninth embodiment of the present invention. The difference between the mutual-capacitive touch panel 900 provided in this embodiment and the seventh embodiment shown in FIG. 8 is that each electrode strip EL6 in this embodiment is not a curved electrode strip. Moreover, the difference between the electrode group EM6 and the third electrode E63 of the present embodiment is that it does not have an opening, so the arrangement relationship is not repeated here, but it is not limited thereto. Specifically, each electrode strip EL6 includes four first strips S61 and a plurality of second strips S62, wherein each first strip S61 extends along the second direction D2, and the first strip S61 Both of them span one of the electrode groups EM6 of each first electrode string ES1, and the other two of the first strip S61 span one of the third electrodes E63 of each second electrode string ES2 By. Each second strip S62 of each electrode strip EL6 extends along the first direction D1 and spans the first strip S61, and two adjacent second strips S62 correspond to a first electrode series ES1 And a second electrode series ES2, which overlaps one of the electrode groups EM6 and one of the third electrodes E63. In this embodiment, each electrode group EM6 of the first row can be coupled with two adjacent first strips S61 and two adjacent second strips S62 of the corresponding electrode strip EL6 to form a sensing unit SU6, and the last row The third electrode E63 can be coupled to two adjacent first strips S61 and two adjacent second strips S62 of the corresponding electrode strip EL6 to form a sensing unit SU6, and the other electrode groups EM6 can be connected to the two Two adjacent first strips S61 and two adjacent second strips S62 of one of the adjacent electrode strips EL6 and two adjacent first strips S61 and two adjacent second strips of the other S62 is coupled to form two sensing units SU6, and the third electrodes E63 in other columns can be respectively connected to two adjacent first strip-shaped portions S61 and two adjacent second strip-shaped portions of one of two adjacent electrode strips EL6 S62 and two adjacent first strips S61 and two adjacent second strips S62 are coupled to form two sensing units SU6.

It is worth mentioning that, because the curved electrode strip extends along the second direction D2 in a curved manner, the impedance difference between the sensing units adjacent to the two ends of the curved electrode strip is too large, resulting in an excessively large difference in the sensing signal, which is likely to cause a wrong judgment of the sensing signal The problem occurs. However, in this embodiment, the first strip S61 of the non-bending design can reduce the impedance difference of the sensing units adjacent to the two ends of the electrode strip EL6, thereby avoiding the error of the sensing signal judgment. The stacked structure of the first electrode layer C61, the insulating layer and the second electrode layer C62 of this embodiment can be applied to the first embodiment shown in FIG. 2, the second embodiment shown in FIG. 3 and the position shown in FIG. 4 Any of the third embodiment shown. In another embodiment, the first electrode layer C61 shown in FIG. 10 may also be replaced with the first electrode layer C41 having the opening shown in FIG. 8 or the first electrode layer C51 having the opening shown in FIG. 9.

Please refer to FIG. 11, which illustrates a schematic top view of a mutual-capacitive touch panel according to a tenth embodiment of the present invention. The difference between the mutual-capacitive touch panel 1000 provided in this embodiment and the ninth embodiment shown in FIG. 10 is that each electrode strip EL7 of the second electrode layer C72 of this embodiment includes a trunk portion S71, A plurality of first branch portions S72 and a plurality of second branch portions S73. Specifically, each trunk portion S71 is strip-shaped and extends along the first direction D1 and is located between one of the electrode groups EM7 adjacent to each other and one of the third electrodes E73 such that each trunk portion S71 The electrode group EM7 and the third electrode E73 are not overlapped in the vertical projection direction V. That is, the gap between the electrode group EM7 adjacent to each other and the third electrode E73 is larger than the width of the trunk portion S71 in the first direction D1 to provide the trunk portion S71, thereby reducing the trunk portion S71 and the electrode group EM7 And the coupling capacitance between the third electrode E73. Each trunk portion S71 spans a first connection line segment CS71 and a second connection line segment CS72 of each first electrode string ES1 and a third connection line segment CS73 of each second electrode string ES2. For example, the width of the trunk portion S71 in the first direction D1 may be greater than the width of the first connecting line segment CS71 in the second direction D2, the width of the second connecting line segment CS72 in the second direction D2, and the third connecting line segment CS73 The width in the second direction D2.

Each first branch portion S72 and each second branch portion S73 respectively extend from opposite sides of each trunk portion S71, and two adjacent first branch portions S72 overlap the first electrode E71 of one of the electrode groups EM7, respectively With the second electrode E72, two adjacent second branch portions S73 overlap one of the third electrodes E73, respectively. In this embodiment, each first branch portion S72 may be symmetrical to the corresponding second branch portion S73 in the second direction D2, so that two adjacent sensing units SU7 located in the same row may be mirror-symmetrical in structure to enhance touch Control accuracy. In addition, in this embodiment, each electrode group EM7 in the first row can be coupled with a part of the trunk portion S71 of the corresponding electrode strip EL7 and two adjacent first branch portions S72 to form a sensing unit SU7, and the third electrode in the last row E73 may be coupled with a part of the trunk portion S71 of the corresponding electrode strip EL7 and two adjacent second branch portions S73 to form a sensing unit SU7, and each electrode group EM7 of the other column may be respectively connected to one of the two adjacent electrode strips EL7 The trunk portion S71 and the two adjacent first branch portions S72 and the other partial trunk portion S71 and the two adjacent second branch portions S73 are coupled to form two sensing units SU7, and the third electrodes E73 in the other columns can be connected to the two One part of the main stem portion S71 and two adjacent second branch portions S73 of the adjacent electrode strip EL7 and the other part of the main stem portion S71 and two adjacent first branch portions S72 are coupled to form two sensing units SU7.

Compared to the first electrode layer shown in FIG. 10, each first electrode E71 in the first electrode layer C71 of this embodiment includes a first opening OP71, and each second electrode E72 includes a second opening OP72, and Each third electrode E73 includes a third opening OP73 and a fourth opening OP74 arranged side by side in the second direction D2. Each first opening OP71 and each third opening OP73 are alternately arranged in the first direction D1, and each second opening OP72 and each fourth opening OP74 are alternately arranged in the first direction D1. In this embodiment, the width of each first opening OP71 and each second opening OP72 in the first direction D1 of the first row will be smaller than the width of each first opening OP71 and each second opening OP72 of the other row in the first direction D1 Width, the first opening OP71 and the second opening OP72 of the first row overlap the corresponding first branch S72 in the vertical projection direction V, and the first opening OP71 and the second opening OP72 of the other row Each of them overlaps a first branch portion S72 and a second branch portion S73 of two adjacent electrode strips EL7 in the vertical projection direction V. Moreover, the width of each third opening OP73 and each fourth opening OP74 of the last row in the first direction D1 will also be smaller than the width of each third opening OP73 and each fourth opening OP74 of the other row in the first direction D1, The third openings OP73 and the fourth openings OP74 of the first row overlap the corresponding second branch portion S73 in the vertical projection direction V, and the third openings OP73 and the fourth openings OP74 of the other rows overlap A first branch portion S72 and a second branch portion S73 of two adjacent electrode strips EL7.

It is worth mentioning that although the mutual-capacitive touch panel shown in FIG. 10 can improve the problem of excessive impedance difference between the sensing units at both ends of the curved electrode strip, the first strip-shaped portion extending along the second direction D2 Both need to cross the electrode group or the third electrode, so that there is still a large coupling capacitance between the electrode strip and the first electrode series and the second electrode series, which cannot be further reduced, resulting in an excessively high background capacitance. However, in the present embodiment, each trunk portion S71 is strip-shaped and disposed in the gap between the electrode group EM7 and the third electrode E73 adjacent to each other, and each first branch portion S72 and each second branch portion S73 It can be overlapped with one of the corresponding first opening OP71, second opening OP72, third opening OP73 and fourth opening OP74, so not only can the problem of excessive impedance difference between the sensing units SU at both ends of the electrode strip EL7 be improved, but also The coupling capacitance between each electrode strip EL7 and the first electrode series ES1 and the second electrode series ES2 can be reduced, thereby reducing the background capacitance of each sensing unit SU of the mutual capacitive touch panel 1000, and reducing the feedback of the amplifier capacitance. The stack structure of the first electrode layer C71, the insulating layer and the second electrode layer C72 of this embodiment can be applied to the first embodiment shown in FIG. 2, the second embodiment shown in FIG. 3 and the position shown in FIG. 4 Any of the third embodiment shown. In particular, when the structures of the first electrode layer C71 and the second electrode layer C72 of FIG. 11 are applied to the stacked structure shown in FIG. 2, the background capacitance of each sensing unit can be reduced to 3.13 picofarads (pF, for example) ). Compared with the background capacitance of the conventional sensing unit shown in FIG. 1 is about 4.5pF, the design of the first electrode layer C71 and the second electrode layer C72 in this embodiment can be effectively reduced with the reduction of the insulation layer The background capacitance of each sensing unit SU.

In summary, in the mutual-capacitance touch panel of the present invention, the first connection line segment and the second connection line segment are avoided by bending the electrode strips, which not only prevents each bending electrode strip from being connected to the first connection line segment and the second connection line segment The coupling capacitance between the line segments reduces the touch accuracy, and also reduces the background capacitance of each sensing unit to improve the quality of touch detection. In addition, the first electrode and the second electrode are arranged side by side, and the third connecting line segment connecting the third electrode is provided between the first electrode and the second electrode side by side, which can avoid bending the electrode strip from extending to two adjacent first electrodes Between the first connection line segment and the second connection line segment in the electrode string, thereby reducing the distance between two adjacent first electrode strings. Furthermore, by disposing each electrode strip in the gap between the adjacent electrode group and the third electrode, not only can each electrode strip be designed in a strip shape, thereby reducing the difference in impedance between the two ends of each electrode strip, In addition, the sensing signal judgment error is avoided, and the coupling capacitance between each electrode strip and the electrode group and the third electrode can be reduced, thereby reducing the background capacitance of the mutual capacitance touch panel. The above are only the preferred embodiments of the present invention, and all changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the scope of the present invention.

10‧‧‧ Touch panel 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 ‧‧‧ Compatible touch panel 102, 202, 204, 302‧‧‧ Substrate 104‧‧‧ Protective layer 106, 110, 206, 208‧‧‧‧adhesive layer 108‧‧‧cover plate 112‧‧‧ display device 600a‧‧‧touch area 600b‧peripheral area ES‧‧‧ drive series EL‧‧‧ Inductive series IN1, IN2, IN3 ‧‧‧ Insulation layer ES1‧‧‧ First electrode series ES2‧‧‧ Second electrode series C1, C11, C21, C31, C41, C51, C61, C71 One electrode layer C2, C12, C22, C32, C42, C52, C62, C72 ‧‧‧Second electrode layer D1‧‧‧ First direction D2‧‧‧ Second direction V‧‧‧ Vertical projection direction SU1, SU2, SU3, SU4, SU5, SU6, SU7‧‧‧Induction units EL1, EL2, EL3, EL4‧‧‧Bent electrode strip EL6, EL7‧‧‧Electrode strip EL2a, EL4a‧‧‧The first bent electrode strip EL2b, EL4b‧ ‧‧Second curved electrode strips E11, E21, E31, E41, E51, E61, E71‧‧‧First electrode E12, E22, E32, E42, E52, E62, E72‧‧‧Second electrode E33, E43, E53 , E63, E73 ‧‧‧ Third electrode CS11, CS21, CS31, CS71 ‧‧‧ First connection line segment CS12, CS22, CS32, CS72 ‧‧‧ First connection line segment CS33, CS73‧‧‧ Third connection line segment EM3, EM4, EM6, EM7 ‧‧‧ electrode group CL‧‧‧ connecting wires S11, S31, S41‧‧‧ first line segment S12, S32, S42‧‧‧ second line segment S13, S33‧‧‧ third line segment S14, S34‧‧‧The fourth line segment U1, U2, U3, U4‧‧‧U-shaped line segment OP1, OP2‧‧‧ opening OP31, OP41, OP51, OP71‧‧‧ first opening OP32, OP42, OP52, OP72‧‧‧ Second opening OP33, OP43, OP53, OP73‧‧‧ Third opening OP34, OP44, OP54, OP74‧‧‧ Fourth opening S61‧‧‧First strip S62‧‧‧Second strip S71‧‧ ‧The main branch S72‧‧‧The first branch S73‧‧‧The second branch

FIG. 1 is a schematic top view of a conventional double-layer electrode structure touch panel with a narrow peripheral area. FIG. 2 is a schematic cross-sectional view of a mutual-capacitive touch panel according to the first embodiment of the invention. FIG. 3 is a schematic cross-sectional view of a mutual-capacitive touch panel according to a second embodiment of the invention. FIG. 4 is a schematic cross-sectional view of a mutual capacitance touch panel according to a third embodiment of the invention. FIG. 5 is a schematic top view of a mutual-capacitive touch panel according to a fourth embodiment of the invention. FIG. 6 is a schematic top view of a mutual-capacitive touch panel according to a fifth embodiment of the invention. FIG. 7 is a schematic top view of a mutual-capacitive touch panel according to a sixth embodiment of the invention. FIG. 8 is a schematic top view of a mutual-capacitive touch panel according to a seventh embodiment of the invention. FIG. 9 is a schematic top view of a mutual-capacitive touch panel according to an eighth embodiment of the invention. FIG. 10 is a schematic top view of a mutual-capacitive touch panel according to a ninth embodiment of the present invention. FIG. 11 is a schematic top view of a mutual-capacitive touch panel according to a tenth embodiment of the invention.

1000‧‧‧ Mutual capacitance touch panel

ES1‧‧‧First electrode series

ES2‧‧‧Second electrode series

C71‧‧‧First electrode layer

C72‧‧‧Second electrode layer

D1‧‧‧First direction

D2‧‧‧Second direction

V‧‧‧Vertical projection direction

SU7‧‧‧Induction unit

EL7‧‧‧electrode strip

E71‧‧‧First electrode

E72‧‧‧Second Electrode

E73‧‧‧third electrode

CS71‧‧‧First connection line

CS72‧‧‧The first connection line

CS73‧‧‧The third connection line

EM7‧‧‧Electrode group

CL‧‧‧Connecting line

OP71‧‧‧First opening

OP72‧‧‧Second opening

OP73‧‧‧third opening

OP74‧‧‧ fourth opening

S71‧‧‧ Main Staff

S72‧‧‧The first branch

S73‧‧‧Second Branch

Claims (19)

A mutual-capacitive touch panel includes: a first electrode layer, including a plurality of first electrode strings and a plurality of second electrode strings, each extending along a first direction, and each of the first electrode strings Corresponding to one of the plurality of second electrode series; a second electrode layer disposed on the first electrode layer, the second electrode layer includes a plurality of electrode strips, each extending along a second direction, and Each of the electrode strips spans the plurality of first electrode series and the plurality of second electrode series; and an insulating layer is disposed between the first electrode layer and the second electrode layer; wherein each of the first An electrode series includes a plurality of first electrodes and a plurality of second electrodes. In each of the first electrode series, each of the first electrodes is electrically connected to each of the second electrodes, and each of the first electrodes corresponds to One of the plurality of second electrodes is arranged side by side along the second direction and forms an electrode group; wherein each second electrode series includes a plurality of third electrodes electrically connected to each other, and each of the electrode groups is Each of the third electrodes is alternately arranged along the first direction, and each of the electrode strips overlaps one of the plurality of electrode groups adjacent to each other and one of the plurality of third electrodes in a vertical projection direction By. The mutual-capacitive touch panel according to claim 1, wherein each of the first electrode strings further includes a plurality of first connection line segments and a plurality of second connection line segments, and each of the first connection line segments is connected to two adjacent Between the plurality of first electrodes, each second connection line segment is connected between two adjacent second electrodes respectively, and the plurality of first connection line segments of each first electrode series are connected to the A plurality of second connection line segments are respectively disposed on two opposite sides of the corresponding second electrode series. The mutual capacitance touch panel according to claim 1, wherein each of the second electrode series further includes a plurality of third connection line segments, respectively connected between two adjacent third electrodes, and each of the The third connecting line segments are respectively disposed between one of the plurality of first electrodes and one of the plurality of second electrodes arranged side by side. The mutual-capacitive touch panel according to claim 1, wherein each first electrode series further includes a connection line for electrically connecting the plurality of first electrodes and the plurality of second electrodes, and the connection line is provided At one end of the corresponding second electrode series. The mutual-capacitive touch panel according to claim 1, wherein each of the electrode strips includes a trunk portion, a plurality of first branch portions, and a plurality of second branch portions, each of the trunk portions extends along the first direction and Located between one of the plurality of electrode groups adjacent to each other and one of the plurality of third electrodes, each of the first branch portion and each of the second branch portions are respectively opposed from two of each of the trunk portions Extending from the side, the two adjacent first branch portions overlap the first electrode and the second electrode of one of the plurality of electrode groups, respectively, and the two adjacent second branch portions Respectively overlap one of the plurality of third electrodes. The mutual capacitance touch panel of claim 5, wherein each of the first electrodes includes a first opening, each of the second electrodes includes a second opening, and each of the third electrodes includes a third opening and a first opening Four openings, side by side in the second direction, the two adjacent first branch portions respectively overlap the corresponding first opening of the first electrode and the corresponding second opening of the second electrode, the two phases The adjacent second branch portions respectively overlap the third opening and the fourth opening of the corresponding third electrode. The mutual-capacitive touch panel according to claim 1, wherein each of the electrode strips includes four first strip-shaped portions and a plurality of second strip-shaped portions, each of the first strip-shaped portions extends along the second direction , Two of the plurality of first strips span one of the plurality of electrode groups of each first electrode series, and the other two of the plurality of first strips span each of the One of the plurality of third electrodes in the second electrode series, each of the second strip-shaped portions of each electrode strip extends along the first direction and spans the plurality of first strip-shaped portions, and The two adjacent branch portions overlap one of the plurality of electrode groups and one of the plurality of third electrodes. The mutual-capacitive touch panel according to claim 1, wherein each of the first electrode strings further includes a plurality of first connection line segments and a plurality of second connection line segments, and each of the second electrode series further includes a plurality of Three connecting line segments, and each of the electrode strips extends along the second direction in a curved manner, so that each of the electrode strips does not overlap the plurality of first connecting line segments and the plurality of second connecting line segments in the vertical projection direction Connect with the plurality of third segments. The mutual-capacitive touch panel according to claim 8, wherein two adjacent ones of the plurality of electrode strips overlap the same one of the plurality of third electrodes of each second electrode series in the vertical projection direction And symmetrical to each other in the first direction. The mutual capacitance touch panel of claim 1, wherein each of the first electrodes includes a first opening, each of the second electrodes includes a second opening, and each of the third electrodes includes a third opening and a first opening Four openings, side by side in the second direction, each first opening and each third opening are alternately arranged along the first direction, and each second opening and each fourth opening are alternately along the first direction arrangement. The mutual capacitive touch panel according to claim 1, wherein the plurality of electrode groups and the plurality of third electrodes are arranged in an array, the plurality of electrode groups are located in odd columns, and the plurality of third electrodes are located in even columns, The first electrode of each electrode group that is not in the first row includes two first openings, the second electrode of each electrode group that is not in the first row includes two second openings, and each third electrode that is not in the last row includes Two third openings and two fourth openings, every two of the plurality of first openings and every two of the third openings are alternately arranged along the first direction, and every two of the plurality of second openings and every two of the second openings The four openings are alternately arranged along the first direction. The mutual capacitance touch panel as claimed in claim 1, wherein the insulating layer is formed of an insulating material including silicon oxide or silicon nitride, and has a thickness between 1.2 microns and 30 microns. The mutual capacitance touch panel of claim 1, wherein the insulating layer includes an adhesive layer and a substrate, the thickness of the adhesive layer is substantially 20 μm, and the thickness of the substrate is substantially 25 μm. The mutual capacitance touch panel as claimed in claim 1, wherein the insulating layer is a substrate, and the first electrode layer and the second electrode layer are respectively formed on the upper surface and the lower surface of the substrate. A mutual-capacitive touch panel includes: a first electrode layer, including a plurality of first electrode strings and a plurality of second electrode strings, each extending along a first direction, and each of the first electrode strings Corresponding to one of the plurality of second electrode series, wherein each of the first electrode series includes a plurality of first electrodes and a plurality of first connection line segments, the plurality of first electrodes passes through the plurality of first connection line segments Electrically connected to each other, each of the second electrode series includes a plurality of second electrodes and a plurality of second connection line segments, the plurality of second electrodes is electrically connected to each other through the plurality of second connection line segments, the plurality of first electrodes The electrodes and the plurality of second electrodes are arranged in an array, and each of the first electrodes of one of the plurality of first electrode strings and the corresponding of each of the one of the plurality of second electrode strings The second electrodes are alternately arranged along the first direction; a second electrode layer is disposed on the first electrode layer, the second electrode layer includes a plurality of curved electrode strips, each extending along a second direction, wherein each The curved electrode strips span the plurality of first electrode series and the plurality of second electrode series, and each of the curved electrode strips overlaps the plurality of first electrodes in two adjacent rows in a vertical projection direction And the plurality of second electrodes; and an insulating layer disposed between the first electrode layer and the second electrode layer. The mutual-capacity touch panel of claim 15, wherein the plurality of curved electrode strips do not overlap the plurality of first connection line segments and the plurality of second connection line segments in the vertical projection direction. The mutual capacitance touch panel of claim 15, wherein the width of each first electrode in the second direction is the same as the width of each second electrode in the second direction. The mutual-capacity touch panel according to claim 15, wherein two adjacent ones of the plurality of curved electrode strips overlap the same one of the plurality of first electrodes of each first electrode series in the vertical projection direction And symmetrical to each other in the second direction. The mutual capacitance touch panel of claim 15, wherein each of the first electrodes includes a first opening, and each of the second electrodes includes a second opening.

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