CN105739796A - capacitive touch device - Google Patents

Abstract

The present invention relates to a capacitive touch device, which is mainly provided with an active area on the surface of a substrate, and the surface of the substrate is provided with a plurality of electrode groups arranged in parallel along a first direction and located in the active area, each electrode group comprises a plurality of electrode pairs arranged in series along a second direction and a plurality of wirings respectively connecting each electrode pair; wherein: except for one or more electrode pairs adjacent to the boundary of the active area having a first sensing area, the other electrode pairs in the plurality of electrode groups have a second sensing area, wherein the second sensing area is larger than the first sensing area. By shortening the sensing area of the electrode pairs adjacent to the boundary of the active area, the wiring problem of the narrow-frame touch device and the sensing accuracy problem of the boundary of the active area are solved.

Description

capacitive touch device

technical field

The invention relates to a touch device, in particular to a capacitive touch device which changes the sensing area of adjacent electrodes at the boundary of the active area to solve the wiring problem of the narrow frame casing.

Background technique

Since the single-layer capacitive touch panel only applies electrodes and wiring on one side of the substrate, it has the advantages of high process yield and low cost. However, it still has many limitations in the realization of multi-object touch function, which is difficult On par with double-layer capacitive touch panels. With the continuous improvement of technology, the single-layer capacitive touch panel has gradually realized the real multi-touch function. A single-layer capacitive touch panel using mutual capacitance scanning is shown in Figure 10, which includes multiple Two electrode groups 70 arranged side by side in the vertical direction, each electrode group 70 includes a sensing electrode 71 and a plurality of driving electrodes 72, the sensing electrodes 71 are elongated, and each driving electrode 72 is arranged equidistantly and parallel to the sensing electrodes 71 relatively. The single-layer capacitive touch panel adopts mutual capacitance scanning, that is, each driving electrode 72 transmits a driving signal, and the sensing electrode 71 receives a sensing signal. Using the aforementioned technology, no matter whether two or more objects fall on different electrode groups 70 or on the same electrode group 70, they can be judged from the changes in the sensing values on the corresponding sensing electrodes 71, and then in the single-layer capacitive touch Multi-object touch is realized on the control panel.

In order to further improve the efficiency and accuracy of interpretation, another single-layer capacitive touch panel using mutual capacitance scanning has come out, as shown in FIG. Two electrode groups 80 are arranged side by side in the same direction. Each electrode group 80 is composed of a plurality of electrode pairs 81 and a plurality of wires 82. Each electrode pair 81 includes a driving electrode and a sensor parallel to the driving electrode. Composed of electrodes (1T1R), the driving electrodes and sensing electrodes of each electrode pair 81 are respectively connected to the corresponding wires 82 . Under the aforementioned structure, when each electrode group 80 is working, the driving electrodes of each electrode pair 81 transmit the excitation signal respectively, and the corresponding sensing electrode senses the excitation signal. When an object touches the corresponding electrode pair, it will Change the sensing amount of the sensing electrode, and then judge the object. Since the driving electrodes and the sensing electrodes of the electrode pair 81 transmit sensing signals in a one-to-one manner, not only can multi-object touch control be realized, but also the accuracy of interpretation can be improved.

From the above, it can be known that the existing single-layer capacitive touch panel can realize real multi-object touch under the single-layer structure. However, due to the special layout of the electrode group of the single-layer capacitive touch panel, many peripheral designs are restricted. As shown in FIG. 11 above, the electrode group 80 of the single-layer capacitive touch panel is provided with a plurality of electrode pairs 81 in series in a longitudinal direction, and the wiring 82 of the electrode group 80 is located between the electrode pairs 81 and Between the electrode pair 81 of another adjacent electrode group 80, viewed from the direction of the drawing, the electrode pair 81 is on the left side of the electrode group 80, and the wiring 82 is on the right side. As for the rightmost electrode group 80 The current common practice is to put the wiring 82 outside the active area (ActiveArea), that is, let the wiring 82 pass through the frame. However, if the wiring 82 passes through the frame, in addition to restricting the design of the narrow frame , there is also the problem of the accuracy of position judgment when the object F is close to the boundary. As shown in FIG. That is to align with the boundary of the active area (also the boundary of the frame 90), in this case, when the object F falls on the boundary of the active area, its ideal coordinate interpretation position should be at point A, but the coordinates actually interpreted The position is at point B, and the reason is that when the object F falls on the boundary of the active area, it simultaneously touches the electrode pair 81 of the rightmost electrode group 80 and the electrode pair of the leftmost electrode group 80' 81', and the area of the electrode pair 81 contacting the rightmost electrode group 80 is greater than the area of the electrode pair 81' of the left adjacent electrode group 80' (the area where the object F contacts the electrode group 80' includes the non-inductive path line 82 ′), in other words, the change in the sensing amount produced by the object F to the electrode pair 81 will be greater than the sensing amount change generated to the electrode pair 81 ′, thus causing a shift in the coordinates of interpretation.

From the above, it can be seen that the current single-layer capacitive touch panel has a deficiency in the frame routing design. If the frame space is used for routing, not only is it not conducive to the narrow frame design, but also affects the accuracy of edge coordinate judgment. Therefore, the issue of the frame wiring of the capacitive touch panel needs to be further examined and a feasible solution must be sought.

Contents of the invention

Therefore, in order to solve the above problems, a main purpose of the present invention is to provide a capacitive touch device, which can solve the problem of narrow border touch devices by shortening the sensing area of the electrode pair adjacent to the boundary of the active area in the capacitive touch device. routing issues and edge resolution issues.

The main technical means taken to achieve the aforementioned purpose is to make the aforementioned capacitive touch device include:

a substrate having a surface, the surface of the substrate having an active area;

A plurality of electrode groups, which are parallel to the surface of the substrate along a first direction and located in the active area, the plurality of electrode groups respectively include a plurality of electrode pairs arranged in series along a second direction and a plurality of respectively The traces connecting the respective electrode pairs; where:

Among the plurality of electrode groups, except one or more electrode pairs adjacent to the boundary of the active area have a first sensing area, other electrode pairs have a second sensing area, wherein the second sensing area is larger than the first sensing area.

Preferably, a redundant space is formed between the electrode pair with the first sensing area and the boundary of the active area for accommodating the wires correspondingly connected to the electrode pair with the first sensing area.

Preferably, a redundant space is formed between the electrode pair with the first sensing area and the boundary of the active area for accommodating a plurality of empty sensing lines.

Preferably, a redundant space is formed between the pair of electrodes having the first sensing area and the wiring corresponding to the same electrode group, and a plurality of empty sensing lines are arranged in the redundant space.

Preferably, the second sensing area is larger than the first sensing area means that the width of the electrode pair with the second sensing area is greater than the width of the electrode pair with the first sensing area.

Preferably, the second sensing area is larger than the first sensing area means that the length of the electrode pair with the second sensing area is greater than the length of the electrode pair with the first sensing area.

Preferably, the electrode pair with the first sensing area refers to a plurality of electrode pairs arranged in series in the second direction in the same electrode group adjacent to the boundary of the active area.

Preferably, the electrode pair with the first sensing area refers to more than one electrode pair respectively adjacent to the boundary of the active area in the plurality of electrode groups.

Preferably, each electrode pair of each electrode group includes a driving electrode and a sensing electrode, a coupling capacitor is formed between the driving electrode and the sensing electrode, and the driving electrode and the sensing electrode are respectively connected to different wires.

Preferably, the driving electrode of the electrode pair includes a straight arm and a plurality of transverse ribs intersecting the straight arm at an angle, so that the driving electrode is in the shape of a fishbone, and the sensing electrode surrounds the straight arm and the transverse rib of the driving electrode around.

Preferably, each electrode pair of each electrode group includes a driving electrode and two sensing electrodes, and the driving electrode forms a coupling capacitance with the two sensing electrodes at the same time, and the driving electrode and the sensing electrodes are respectively connected to the Different trace connections.

Preferably, the two sensing electrodes are arranged in series along the second direction, the two sensing electrodes are respectively arranged on one side of the driving electrode correspondingly, and have the same distance from the driving electrode.

Preferably, the first sensing area is half of the second sensing area, wherein the length or width of the electrode pair having the first sensing area is reduced by half of the sensing area to form the redundant space.

Another main technical means adopted to achieve the aforementioned purpose is to make the aforementioned capacitive touch device include:

A protective layer, which includes a transparent visible area and a non-transparent non-visible area;

A substrate, which is located under the protective layer, the surface of the substrate has an active area and overlaps with the visible area of the protective layer;

a plurality of first sensing units arranged in a matrix in the active area of the substrate;

A plurality of second sensing units arranged on the substrate along a first direction, the plurality of second sensing units are located between the plurality of first sensing units and a first boundary of the active area, the second The sensing area of the sensing unit is smaller than the sensing area of the first sensing unit; and

A plurality of wires are respectively connected to the plurality of second sensing units, and a combination of the plurality of wires and the plurality of second sensing units is located in the active area and adjacent to the first boundary of the active area.

Another main technical means adopted to achieve the aforementioned purpose is to make the aforementioned capacitive touch device include:

a substrate having an active area thereon;

two electrode layers formed on the substrate, each of the electrode layers including a plurality of electrodes, and the plurality of electrodes are correspondingly located in the active area of the substrate; and

a plurality of wires, which are respectively connected to the plurality of electrodes;

Wherein in at least one electrode layer of the two electrode layers, the electrode adjacent to the boundary of the active area has a first sensing area, the other electrodes have a second sensing area, and the second sensing area larger than the first sensing area, so as to form a redundant space between the boundary of the active area and the electrode with the first sensing area, for accommodating the wiring correspondingly connected to the electrode with the first sensing area .

Preferably, the two electrode layers are an X-axis electrode layer and a Y-axis electrode layer, the X-axis electrode layer includes a plurality of X-axis electrodes, and the X-axis electrodes are connected in series in the X-axis direction, and each electrode the strings are parallel to each other; and

The Y-axis electrode layer includes a plurality of Y-axis electrodes, and the Y-axis electrodes are connected in a series along the Y-axis direction, and each of the electrode series is parallel to each other.

Preferably, the X-axis electrodes adjacent to the boundary of the active area in the X-axis electrode layer have the first sensing area, and the other X-axis electrodes have the second sensing area.

Preferably, the Y-axis electrodes adjacent to the boundary of the active area in the Y-axis electrode layer have the first sensing area, and the other Y-axis electrodes have the second sensing area.

The beneficial effect of the present invention lies in that the above technology reduces the sensing area of the electrodes, electrode pairs or sensing units adjacent to the boundary of the active area on the touch device to match the sensing amount of the electrode pair adjacent to the boundary electrode pair, and improves the edge coordinates. The accuracy of the interpretation; in addition, the redundant space left by the reduced electrode, electrode pair or sensing unit sensing area is also used to accommodate the routing, so as to solve the problem of the narrow frame design caused by the use of the frame space routing. question.

Description of drawings

Fig. 1 is a plan view of an embodiment of the present invention.

Fig. 2 is an enlarged view of an electrode pair according to an embodiment of the present invention.

Fig. 3 is a partial plan view of an embodiment of the present invention (the right boundary of the active area).

FIG. 4 is a schematic diagram of the principle of improving the accuracy of edge coordinate interpretation according to an embodiment of the present invention.

Fig. 5 is another partial plan view of an embodiment of the present invention (the left boundary of the active area).

Fig. 6 is another partial plan view (lower boundary of the active area) of an embodiment of the present invention.

Fig. 7 is another partial plan view (upper boundary of the active area) of an embodiment of the present invention.

Fig. 8 is a plan view of yet another embodiment of the present invention.

Fig. 9 is a plan view of still another embodiment of the present invention.

FIG. 10 is a plan view of a known single-layer capacitive touch panel.

FIG. 11 is a plan view of another known single-layer capacitive touch panel.

FIG. 12 is a schematic diagram of an edge coordinate interpretation offset of another known single-layer capacitive touch panel.

Description of main symbols:

10 substrates

20, 20’, 20” electrode group 21, 21A electrode pair

211 driving electrodes 212, 212A, 212B sensing electrodes

22 traces 23 empty induction lines

30 substrate 31X axis electrode layer

310,310AX axis electrode 32Y axis electrode layer

320,320AY axis electrode 33,34 wiring

70 electrode groups 71 driving electrodes

72 induction electrodes

80 electrode groups 81 electrode pairs

82 traces.

detailed description

Regarding the first embodiment of the present invention, please refer to Fig. 1, mainly a plurality of electrode groups 20 are formed on a substrate 10, in this embodiment, the substrate 10 has a surface, and its surface has a function Area AA (Active Area), the plurality of electrode groups 20 are formed on the surface of the substrate 10 and located in the active area AA. on the application.

The plurality of electrode groups 20 are elongated and parallel to the surface of the substrate 10 along a first direction X, and each electrode group 20 includes a plurality of electrode pairs arranged in series along a second direction Y 21 and a plurality of wires 22 respectively connected to each electrode pair 21; please refer to FIG. 2, in this embodiment, each electrode pair 21 includes a drive electrode 211 and an induction electrode 212 (1T1R) forming a coupling capacitance respectively. (For the convenience of identification, the sensing electrode 212 in the figure is represented by a dotted line), wherein, the driving electrode 211 is a fishbone-shaped hollow pattern formed by zigzag continuous winding, including a straight arm and a plurality of angles with the straight arm. Intersecting transverse ribs, the sensing electrode 212 is also composed of zigzag continuous windings, which surround the straight arm and the transverse rib of the driving electrode 211 in parallel, and the driving electrode 211 and sensing electrode 212 are connected with different walking Line 22 is connected. In addition, the sensing electrodes 212 of the electrode pairs 21 in the same electrode group 20 are electrically connected to each other.

As mentioned above, the plurality of electrode pairs 21 in each electrode group 20 are arranged in series along the second direction Y, and the traces 22 are parallel to the plurality of electrode pairs 21 along the first direction X. In this embodiment, The plurality of electrode pairs 21 are located on the left side of the figure, and the wires 22 are located on the right side of the figure. And the main feature of the present invention is: reduce the sensing area of the electrode pair 21 adjacent to the border of the active area AA, so that the electrode pair 21A adjacent to the border of the active area AA has a first sensing area. The electrode pair 21 adjacent to the boundary of the area AA has a second sensing area, wherein the second sensing area is larger than the first sensing area, and the ratio of the first sensing area to the second sensing area can be various, such as 1:1～ 1:5, preferably 1:2, that is, the first sensing area is 1/2 of the second sensing area.

In this embodiment, the electrode pair 21A having the first sensing area refers to all the electrode pairs 21A arranged in series along the second direction Y in the same electrode group 20' adjacent to the boundary of the active area AA (as shown in FIG. 3 shows the electrode group 20' adjacent to the right side boundary of the active area AA), the electrode pair 21A has reduced the sensing area by half compared with other electrode pairs 21. In this embodiment, the electrode group 20' The width W1 of the inner electrode pair 21A is reduced by half compared to the width W2 of the electrode pair 21 of the left adjacent electrode group 20. In terms of shape, the right half of the driving electrode 211 is deleted, and the driving electrode 211 surrounds The range of the surrounding sensing electrodes 212 is also relatively narrowed.

Since all the electrode pairs 21A in the same electrode group 20' adjacent to the boundary of the active area AA have reduced their sensing areas, there are one and the second electrode pairs between the electrode group 20' and the boundary of the active area AA. A long and narrow redundant space parallel to the direction Y, which can accommodate the wiring 22 corresponding to the electrode group 20 ′ adjacent to the boundary of the active area AA. In other words, the wiring 22 of the electrode group 20 ′ will be located Within the range of the active area AA, since the frame space of the touch device housing can be eliminated or reduced to accommodate wiring, it can contribute to the narrow frame design of the touch device housing.

In addition to providing a redundant space for accommodating the traces 22 to solve the narrow frame design problem, it also helps to improve the accuracy of edge coordinates. Please refer to Figure 4, when the object F falls on the boundary of the active area AA, its ideal coordinate interpretation position is at point A, and the actual coordinate position is at point B, but point B is very close to point A, that is There is a significant improvement in accuracy. The principle is that when the object F falls on the boundary of the active area AA, although it also touches the electrode group 20' adjacent to the boundary of the active area AA and another electrode group adjacent to the left side of the electrode group 20' For the electrode group 20, although the contacted area of the electrode group 20 adjacent to the left includes the wiring 22, the sensing area of the electrode pair 21 being contacted is reduced, but the electrode group 20' adjacent to the boundary of the active area AA is reduced. The area of the electrode pair 21A is reduced, and the sensing area of the adjacent electrode group 20 whose electrode pair 21 is contacted is reduced, so that the coordinate position of the interpretation can be close to the ideal coordinate position, thereby improving the accuracy of interpretation.

In the foregoing Fig. 3, the present invention makes the so-called electrode pair 21A with the first sensing area refer to all electrode pairs 21A in the same electrode group 20' adjacent to the right boundary of the active area AA; in addition, as shown in FIG. 5, all electrode pairs 21A in the same electrode group 20" adjacent to the left boundary of the active area AA are also called electrode pairs 21A with the first sensing area. It is the same as the electrode group 20' shown in Fig. 2 All the electrode pairs 21A adjacent to the left boundary of the active area AA have the right half of the driving electrodes 211 cut out to reduce the width by half, and the range of the sensing electrodes 212 surrounding the driving electrodes 211 is relatively reduced. The redundant space generated by reducing the sensing area is located between the electrode pair 21A and the left boundary of the active area AA. In this embodiment, the electrode group 20" is provided with a plurality of empty sensing lines 23 in the redundant space. . In addition to being formed between the electrode pair 21A with the first sensing area and the boundary of the active area AA, the aforementioned redundant space can also be formed between the electrode pair 21A and the wiring 22 in the electrode group 20 ″ (in the figure not shown), the redundant space is still used for setting a plurality of empty induction lines. In this embodiment, the electrode pair 21A of the electrode group 20" is aligned with the boundary of the active area AA, and the induction area is reduced The generated redundant space is located between the electrode pair 21A and the corresponding wiring 22, that is, the electrode pair 21A and the corresponding wiring 22 of the electrode group 20" are not adjacent to each other, but are covered by the above-mentioned long and narrow redundant space. Separated by the redundant space, a plurality of empty induction lines 23 can be arranged.

In the foregoing embodiments, the electrode groups 20', 20" adjacent to the left boundary and/or right boundary of the active area AA are made to have electrode pairs 21A with the first sensing area; in addition, each electrode group 20 can also be made , 20', 20 "adjacent to the upper boundary and/or lower boundary of the active area AA the electrode pair 21A is the first sensing area, as shown in Fig. The length L1 of an electrode pair 21A at the lower boundary of the active area AA is shortened by half compared to the length L2 of another electrode pair 21, 21A adjacent to the upper end of the same electrode group 20, 20', and has the first sensing area. A redundant space is formed between the electrode pair 21A of the first sensing area and the lower boundary of the active area AA, and a plurality of empty sensing lines 23 can be arranged in the redundant space. Also as shown in FIG. 7 , the length L1 of an electrode pair 21A whose top end is adjacent to the upper boundary of the active area AA of each electrode group 20 , 20 ′ is compared to the length L1 of the electrode pair 21A adjacent to the lower end of the same electrode group 20 , 20 ′. The length L2 of the pair 21, 21A is shortened by half, and a redundant space is formed between the electrode pair 21A with the first sensing area and the upper boundary of the active area AA. In this embodiment, the redundant space is used for setting A plurality of empty induction lines 23 allow users to have even and symmetrical visual effects intuitively. In addition, it is also possible for the wires 22 to pass through (for example, the upper end of each wire 22 bends and extends in the horizontal direction).

In the foregoing embodiments, the electrode pairs 21, 21A of each electrode group 20, 20', 20" respectively include a driving electrode 211 and a sensing electrode 212; those skilled in the art can understand that the present invention is also applicable to the electrode pair 21 and 21A are composed of one driving electrode 211 and two sensing electrodes 212A and 212B (1T2R), as shown in FIG. 8 , the driving electrode 211 forms a coupling capacitance with the two sensing electrodes 212A and 212B at the same time, The driving electrode 211 is connected to the sensing electrodes 212A, 212B and is respectively connected to the different wires 22. In this embodiment, the two sensing electrodes 212A, 212B are arranged in series along the second direction Y, and the The two sensing electrodes 212A and 212B are respectively disposed on one side of the driving electrode 211 correspondingly, and have the same distance from the driving electrode 211 .

Same as the previous embodiment, in this embodiment, the electrode pair 21A adjacent to the boundary of the active area AA of each electrode group 20, 20' has the first sensing area, and the others are not adjacent to the boundary of the active area AA The electrode pair 21 has the second sensing area, and the electrode pair 21A shortens its length or width to have the first sensing area, and the redundant space generated by shortening the sensing area is used to arrange the wiring 22 and/or empty space. Induction wire (not shown in the figure).

The aforementioned active area AA is used to sense the contact and operation of objects. The present invention can be applied to devices with touch screens, such as mobile phones or tablet computers. These touch devices include a protective layer arranged on the above-mentioned substrate. The protective layer includes a transparent visible area and a non-transparent non-visible area. area, the non-visible area is at the edge of the protective layer. The active area of the substrate overlaps with the visible area of the protective layer, so that the user can perform touch operation in the visible area.

According to the above-mentioned single-layer touch device of the present invention, it can also be understood that the active area on the substrate includes a plurality of first sensing units arranged in a matrix in the active area, and a plurality of second sensing units arranged along the first direction The plurality of second sensing units are located between the plurality of first sensing units and a first boundary of the active area, and the sensing area of the second sensing units is smaller than that of the first sensing units. A plurality of wires are respectively connected to the plurality of second sensing units, and a combination of the plurality of wires and the plurality of second sensing units is located in the active area and adjacent to the first boundary of the active area. The so-called first and second sensing units may be a combination of a driving electrode and a sensing electrode as described above, or a single sensing electrode.

From the above description, it can be understood that the present invention is applied to the specific structure and principle of a single-layer capacitive touch device; and the same technical principle can also be applied to a double-layer capacitive touch device, and a feasible embodiment thereof is shown in FIG. 9 , Mainly, an active area AA is provided on a substrate 30, and two electrode layers 31, 32 and a plurality of wires 33, 34 are formed. The two electrode layers 31, 32 respectively include a plurality of electrodes 310, 320. The electrodes 310, 320 are located in the active area AA of the substrate 30, and are respectively connected to the corresponding wires 33, 34; in this embodiment, an X-axis electrode layer 31 and a Y-axis electrode layer 32 are formed on the substrate 30. The X-axis electrode layer 31 includes a plurality of X-axis electrodes 310, the X-axis electrodes 310 are connected in series in the X-axis direction, and each electrode series is parallel to each other, and the Y-axis electrode layer 32 includes a plurality of Y-axis electrodes 320. The Y-axis electrodes 320 are connected in series in the Y-axis direction, and the electrode series are parallel to each other. The present invention mainly makes the X-axis electrode 310A and the Y-axis electrode 320A adjacent to the boundary of the active area AA in the X-axis electrode layer 31 and/or the Y-axis electrode layer 32 have a first sensing area, and the other X-axis electrodes 310, The Y-axis electrode 320 has a second sensing area, and the second sensing area is larger than the first sensing area.

The X-axis electrode 310A and the Y-axis electrode 320A with the first sensing area form a redundant space between the boundary of the active area AA due to the reduction of their sensing area, and the redundant space is used to accommodate the The wirings 33 and 34 correspondingly connected to the X-axis electrodes 310A and the Y-axis electrodes 320A of the first sensing area. As shown in the figure, after each X-axis electrode 310 reduces its sensing area, the redundant space is formed between the X-axis electrode 310 and the right boundary of the active area AA, for accommodating the correspondingly connected wiring 33; each Y After the sensing area of the axis electrode 320 is reduced, the redundant space is formed between the Y-axis electrode 320 and the upper boundary of the active area AA, so that the correspondingly connected wiring 34 is accommodated in the redundant space.

As can be seen from the above, the present invention mainly shortens the sensing area of electrodes or electrode pairs adjacent to the boundary of the active area of the capacitive touch device, thereby forming a redundant space for accommodating traces and/or empty sensing lines, thereby solving the problem of utilization The border space accommodates the problem that the routing limits the narrow border design, and at the same time improves the accuracy of edge coordinate interpretation.

Although the present invention has been disclosed by the above-mentioned preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various changes and modifications relative to the above-mentioned embodiments without departing from the spirit and scope of the present invention. It belongs to the technical category protected by the present invention, so the protection scope of the present invention should be determined by the scope defined by the appended claims.

Claims (18)

1. A capacitive touch device, comprising: a substrate having a surface, the surface of the substrate having an active area; A plurality of electrode groups, which are parallel to the surface of the substrate along a first direction and located in the active area, and each electrode group includes a plurality of electrode pairs arranged in series along a second direction and a plurality of respectively connecting the wires of the respective electrode pairs; wherein: In the plurality of electrode groups, more than one electrode pair adjacent to the boundary of the active area has a first sensing area, and other electrode pairs have a second sensing area, wherein the second sensing area is larger than the first sensing area. Sensing area. 2. The capacitive touch device according to claim 1, wherein a redundant space is formed between the electrode pair having the first sensing area and the boundary of the active area for accommodating the electrode pair having the first sensing area. The traces connected to the corresponding electrode pairs of the sensing area. 3. The capacitive touch device according to claim 1, wherein a redundant space is formed between the electrode pair having the first sensing area and the boundary of the active area for accommodating a plurality of empty sensing lines . 4. The capacitive touch device according to claim 1, wherein a redundant space is formed between the electrode pair having the first sensing area and the wiring corresponding to the same electrode group, and a redundant space is set in the redundant space. There are multiple empty sensing lines. 5. The capacitive touch device according to claim 1, wherein the second sensing area is larger than the first sensing area means that the electrode pair with the second sensing area is wider than the electrode pair with the first sensing area width. 6. The capacitive touch device according to claim 1, wherein the second sensing area is larger than the first sensing area means that the length of the electrode pair with the second sensing area is longer than that of the electrode pair with the first sensing area length. 7. The capacitive touch device according to any one of claims 1 to 4, wherein the pair of electrodes having the first sensing area refers to the same electrode group adjacent to the boundary of the active area with the A plurality of electrode pairs arranged in series in the second direction. 8. The capacitive touch device according to claim 2 or 3, wherein the pair of electrodes having the first sensing area refers to more than one electrode respectively adjacent to the boundary of the active area in the plurality of electrode groups right. 9. The capacitive touch device according to any one of claims 1 to 4, wherein each electrode pair of each electrode group comprises a driving electrode and a sensing electrode, between the driving electrodes and the sensing electrodes A coupling capacitor is formed, and the driving electrodes and the sensing electrodes are respectively connected to different wires. 10. The capacitive touch device according to claim 9, wherein the driving electrode of the electrode pair comprises a straight arm and a plurality of transverse ribs intersecting the straight arm at an angle, so that the driving electrode has a herringbone shape shape, the sensing electrodes surround the straight arms and the transverse ribs of the driving electrodes. 11. The capacitive touch device according to claim 9, wherein each electrode pair of each electrode group comprises a driving electrode and two sensing electrodes, and the driving electrode is connected between the two sensing electrodes at the same time. A coupling capacitance is formed, and the driving electrodes and the sensing electrodes are respectively connected to the different wires. 12. The capacitive touch device according to claim 11, wherein the two sensing electrodes are arranged in series along the second direction, and the two sensing electrodes are respectively arranged on one side of the driving electrode correspondingly, and have the same distance as the driving electrodes. 13. The capacitive touch device according to claim 5 or 6, wherein the first sensing area is half of the second sensing area, wherein the electrode pair having the first sensing area has a length of Or cut half of the sensing area in width to form redundant space. 14. A capacitive touch device, comprising: A protective layer, which includes a transparent visible area and a non-transparent non-visible area; A substrate, which is located under the protective layer, the surface of the substrate has an active area and overlaps with the visible area of the protective layer; a plurality of first sensing units arranged in a matrix in the active area of the substrate; a plurality of second sensing units arranged on the substrate along a first direction, and the plurality of second sensing units are located between the plurality of first sensing units and a first boundary of the active area , the sensing area of the second sensing unit is smaller than the sensing area of the first sensing unit; and a plurality of wires, which are respectively connected to the plurality of second sensing units, the combination of the plurality of wires and the plurality of second sensing units is located in the active area and adjacent to the active area first border. 15. A capacitive touch device, comprising: a substrate having an active area thereon; two electrode layers, which are formed on the substrate, each electrode layer includes a plurality of electrodes, and the plurality of electrodes are correspondingly located in the active area of the substrate; and multiple wires, which are respectively connected to the plurality of electrodes; Wherein in at least one electrode layer of the two electrode layers, the electrode adjacent to the boundary of the active area has a first sensing area, the other electrodes have a second sensing area, and the second sensing area larger than the first sensing area, so as to form a redundant space between the boundary of the active area and the electrode with the first sensing area, which is used to accommodate the corresponding connection of the electrode with the first sensing area. Wire. 16. The capacitive touch device according to claim 15, wherein the two electrode layers are respectively an X-axis electrode layer and a Y-axis electrode layer, and the X-axis electrode layer includes a plurality of X-axis electrodes, so The X-axis electrodes are connected in series in the X-axis direction, and the electrode series are parallel to each other; and The Y-axis electrode layer includes a plurality of Y-axis electrodes, the Y-axis electrodes are connected in a series along the Y-axis direction, and the electrode series are parallel to each other. 17. The capacitive touch device according to claim 16, wherein the X-axis electrodes adjacent to the boundary of the active area in the X-axis electrode layer have the first sensing area, and the other X-axis electrodes have the Second sensing area. 18. The capacitive touch device according to claim 16 or 17, wherein the Y-axis electrodes adjacent to the boundary of the active area in the Y-axis electrode layer have the first sensing area, and the other Y-axis electrodes have The second sensing area.