TWI596532B - Electronic device and its single-layer multi-point mutual capacitive touch screen - Google Patents

Description

Electronic device and its single-layer multi-point mutual capacitive touch screen

The present invention relates to the field of touch technologies, and more particularly to an electronic device and a single-layer multi-point mutual capacitive touch screen.

At present, the capacitive touch screen is an important component of human-computer interaction, and has been widely used in electronic products such as mobile phones and tablet computers. Among them, the single-layer capacitive touch screen has become a major development direction of the capacitive touch screen because it only needs to make one layer of electrodes, which has low cost and high cost performance.

An electrode pattern of a conventional single-layer mutual-capacitive touch screen, as shown in FIG. 1, includes four first electrodes X1 to X4 arranged in parallel in the X direction, each of the first electrodes and 15 along the Y The second electrodes Y1 to Y15 arranged in the order are coupled to form a plurality of capacitive sensing nodes 12. Each of the first electrodes is correspondingly connected to the corresponding bonding pad 13 through the corresponding first lead 14 , and each of the second electrodes is correspondingly connected to the corresponding bonding pad 13 through the corresponding second lead 15 . The bonding pad 13 is connected to an FPC (flexible wiring board, not shown). The FPC is connected to a touch chip (not shown), and the touch sensor is used to test the capacitance change of the capacitive sensing node 12 to determine the touch position information of the user. The bonding pad 13 is disposed within the binding area 11. The first lead 14 and the second lead 15 are single layer mutual The wiring of the capacitive touch screen.

Corresponding to the set size of the single-layer mutual-capacitive touch screen, the electrode pattern of the structure shown in FIG. 1 causes the width of the wiring blind area L0 of the single-layer mutual-capacitive touch screen to be large, thereby making the touch precision poor. At the same time, the electrode pattern of the structure shown in FIG. 1 results in a large number of bonding pads and wirings of the single-layer mutual-capacitive touch screen, resulting in a large manufacturing cost.

To solve the above problems, the present invention provides an electronic device and a single-layer multi-point mutual-capacitive touch screen, which improves the touch precision of the single-layer multi-point mutual-capacitive touch screen and reduces the manufacturing cost.

To achieve the above object, the present invention provides a single-layer multi-point mutual-capacitive touch screen, and the single-layer multi-point mutual-capacitive touch screen includes: a first sensing electrode group arranged in a first direction to the mth a sensing electrode group, wherein m is a positive integer greater than 1, each sensing electrode group includes a first electrode unit extending in a second direction and a second electrode unit extending in a second direction, the first electrode unit and the second The electrode unit is oppositely disposed in the first direction, the second direction is perpendicular to the first direction, and in the second direction, the first electrode unit includes the first first electrode to the nth first electrode, and n is greater than 1 An integer, the second electrode unit includes a plurality of second electrodes; a plurality of bonding pads arranged in the first direction, the plurality of bonding pads are disposed at the first ends of the m sensing electrode groups, the first electrodes of the m sensing electrode groups, and The second electrodes are respectively connected to the corresponding bonding pads; a plurality of first leads, the first leads are used for connecting the first electrodes to the corresponding bonding pads; the plurality of second leads are used for connecting the second electrodes to the corresponding Bonding pad; among them, first One of the electrode and the second electrode is used as a touch sensing electrode, and the other is used as a touch driving electrode, the same first electrode single In the element, the adjacent first electrodes are partially disposed opposite each other in the first direction.

Preferably, in the single-layer multi-point mutual capacitive touch screen, in the second direction, the second electrode unit includes a first second electrode to a kth second electrode, and k is a positive integer greater than 1. For the i-th second electrode, i is a positive integer smaller than k, and in the first direction, the i-th second electrode is disposed opposite to the i-th first electrode portion, and is opposite to the (i+1)th first electrode Partial relative settings.

Preferably, in the single-layer multi-point mutual capacitive touch screen, at least partially adjacent second electrodes of the same second electrode unit are oppositely disposed in the first direction.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, in the same sensing electrode group, in the first direction, k=n-1, the kth second electrode and the n-1th An electrode portion is disposed opposite to each other and disposed opposite to the nth first electrode portion; or k=n, the entire kth second electrode is disposed opposite to a portion of the nth first electrode.

Preferably, in the single-layer multi-point mutual capacitive touch screen, the first end is an end of the first first electrode adjacent to the m sensing electrode groups.

Preferably, in the single-layer multi-point mutual capacitive touch screen, any first lead does not intersect the first lead, and any second lead and the second lead do not intersect, and any first lead and any second lead are not cross.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, m is an even number, and in any two adjacent sensing electrode groups, the first electrode unit is adjacent to the first electrode unit, or The two electrode units are disposed adjacent to the second electrode unit, and the adjacent sensing electrode groups are arranged in mirror symmetry.

Preferably, in the single-layer multi-point mutual-capacity touch screen, two adjacent sensing electrode groups are disposed in two adjacent sensing electrode groups disposed adjacent to the first electrode unit and the first electrode unit. The last first electrode of the first electrode unit is connected to the same bonding pad by the same first lead, and the other first electrodes of the first electrode unit of the two adjacent sensing electrode groups are respectively connected by a corresponding first lead connection. The pad, all of the first leads of the two adjacent sensing electrode groups are connected to the corresponding bonding pads by the corresponding first electrodes in the opposite direction of the second direction.

Preferably, in the single-layer multi-point mutual capacitive touch screen, two adjacent sensing electrode groups are disposed in two adjacent sensing electrode groups disposed adjacent to the second electrode unit and the second electrode unit. The other second electrodes of the second electrode unit are connected to the corresponding bonding pads by a separate second lead, and all the second leads of the two adjacent sensing electrode groups are opposite to the second direction by the corresponding second electrode. Connect to the corresponding bond pad.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, in the two adjacent sensing electrode groups disposed adjacent to the first electrode unit and the first electrode unit, the first of the two first electrode units An electrode is divided into a first portion and a second portion in the second direction. In the second direction, the last first electrode of the two first portions is connected to the corresponding bonding pad by the same first lead, and the other first electrodes of the two first portions are connected to the corresponding bonding pads by using the separate first lead. The first lead corresponding to the first electrode of the first portion is connected to the corresponding bonding pad by the corresponding first electrode in the opposite direction of the second direction. In the second direction, the first first electrodes of the two second portions are connected to the corresponding bonding pads by the same first lead, and the other first electrodes of the two second portions are connected to the corresponding bonding by the separate first leads. a pad, the first lead corresponding to the first electrode of the second portion is connected to the set of m senses by the corresponding first electrode in the second direction The via of the second end of the electrode set is connected to the corresponding bonding pad through a jumper connected to the via, and the second end is disposed opposite to the first end, and each jumper is connected with a different bonding pad.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, the first leads corresponding to the first electrodes of the two first portions are connected to corresponding vias disposed at the first end, and are connected to the via holes. The jumpers are connected to the corresponding bond pads.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, in the two adjacent sensing electrode groups, the first electrode connected to the corresponding bonding pad through the jumper and the via is in the second direction The first leads of the two first electrodes having the same positional order are connected to the corresponding bonding pads through the same jumper, and the jumpers and the corresponding leads are electrically connected through the vias.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, in the two adjacent sensing electrode groups disposed adjacent to the second electrode unit and the second electrode unit, the second electrode unit The two electrodes are divided into a first portion and a second portion in the second direction. The other second electrodes of the two first portions are each connected to the corresponding bonding pad by a separate second lead, and the second lead corresponding to the second electrode of the first portion is connected by the corresponding second electrode in the opposite direction of the second direction. To the corresponding bonding pad. The other second electrodes of the two second portions are each connected to the corresponding bonding pad by a separate second lead, and the second lead corresponding to the second electrode of the second portion is connected to the second electrode by the corresponding second electrode. A via hole disposed at the second end of the m sensing electrode groups is connected to the corresponding bonding pad through a jumper connected to the via hole, and the second end is disposed opposite to the first end, and each jumper is connected to a different bonding pad.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, the second leads corresponding to the second electrodes of the two first portions are connected to corresponding vias disposed at the first end, and are transparent to The jumper connected to the via is connected to the corresponding bond pad.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, in the two adjacent sensing electrode groups, the second electrode connected to the corresponding bonding pad through the jumper and the via is an odd second The electrodes are connected to the same jumper, and the even second electrodes are connected to the same jumper.

Preferably, in the single-layer multi-point mutual capacitive touch screen, one of the first electrode unit and the second electrode unit is defined as a first type of electrode unit, and the other is a second type of electrode unit. The leads of the electrodes of all the first type of electrode units are connected to the corresponding bonding pads in the opposite direction of the second direction; the leads of the electrodes of all the second type of electrode units are connected in the second direction to the m sensing electrodes The vias at the second end of the group are connected to the corresponding bonding pads through jumpers connected to the via holes, and the second ends are disposed opposite to the first terminals, and each jumper is connected to a different bonding pad.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, the leads of the electrodes of the first type of electrode unit are connected to the via holes disposed at the first end, and are connected to the jumpers connected to the via holes. The bond pads are connected.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, the first electrode comprises: a first comb-shaped electrode and a second comb-shaped electrode disposed oppositely in the first direction; the first comb-shaped electrode and The second comb-shaped electrodes each include a plurality of first branch electrodes; the first branch electrodes of the first comb-shaped electrodes are along the first direction, and the first branch electrodes of the second comb-shaped electrodes are in the opposite direction of the first direction; the first comb The tooth electrode is electrically connected to the second comb tooth electrode; for the portion of the first comb tooth electrode opposite to the second comb tooth electrode in the second direction, the first branch electrode of the first comb tooth electrode and the second comb tooth electrode One branch electrode corresponds one by one.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, in the same first In the electrode unit, the lengths of the first comb-shaped electrode and the second comb-shaped electrode of the first first electrode in the second direction are different, and the first comb-shaped electrode and the second comb-shaped electrode of the n-th first electrode The lengths in the second direction are different, and the lengths of the first comb-shaped electrodes and the second comb-shaped electrodes of the other first electrodes are the same in the second direction.

Preferably, in the single-layer multi-point mutual capacitive touch screen, the second electrode includes a plurality of second branch electrodes, and the second branch electrode is disposed between the first comb electrode and the second comb electrode, The two branch electrodes include: a first branch unit extending in a reverse direction of the first direction and a second branch unit extending along the first direction; the first branch unit is located at two first branch electrodes of the corresponding first comb-shaped electrode Between the two first branch electrodes and the corresponding two first branch electrodes, the second branch unit is coupled between the two first branch electrodes of the corresponding second comb electrode and the corresponding two first branch electrodes.

Preferably, in the single-layer multi-point mutual-capacity touch screen, for the first first electrode, in the second direction, the first first branch electrode of the first comb-shaped electrode and the second comb thereof The first first branch electrode of the tooth electrode is electrically connected.

Preferably, in the single-layer multi-point mutual capacitive touch screen, for the nth first electrode, in the second direction, the last first branch electrode of the first comb electrode and the second comb thereof The last first branch electrode of the electrode is electrically connected. For the pth first electrode, one first branch electrode of the first comb tooth electrode is electrically connected to one first branch electrode of the second comb tooth electrode, and the two first branch electrodes electrically connected are opposite in the first direction Set, p is a positive integer greater than 1 and less than n.

Preferably, in the single-layer multi-point mutual capacitive touch screen, for the qth a first electrode, a first branch electrode of the first comb-shaped electrode is electrically connected to a first branch electrode of the second comb-shaped electrode, and the two first branch electrodes electrically connected are offset in the first direction, q is A positive integer greater than 1 and no greater than n.

Preferably, in the single-layer multi-point mutual-capacitive touch screen, each of the sensing electrode groups has the same structure, and the sensing electrode groups are arranged in an array.

The present invention also provides an electronic device comprising the single-layer multi-point mutual capacitive touch screen of any of the above.

Preferably, in the electronic device, the electronic device further includes a flexible circuit board and a touch chip, and the touch chip is electrically connected to the single-layer multi-point mutual-capacitive touch screen through the flexible circuit board, wherein the flexible circuit board has more Bond pads are connected.

Preferably, the electronic device comprises a touch wafer, and the touch wafer comprises a plurality of pins, and the signals are transmitted through the plurality of pins and the sensing electrode groups. For each sensing electrode group, the first electrodes are connected to the touch wafer. Pin. In the second direction, the second electrode of the second electrode unit located at the odd position is connected to the same pin of the touch wafer, and the second electrode of the second electrode unit located at the even position is connected to the same pin of the touch wafer, and is located at an odd number The pins of the touch wafer connected to the second electrode of the position are different from the pins of the touch wafer connected to the second electrode located at the even position.

Preferably, for different sensing electrode groups, in the second direction, the first electrode of the first electrode unit having the same position order is connected to the same pin of the touch wafer, and the second electrode of the second electrode unit having the same position order Connect the different pins of the touch wafer.

Preferably, the second electrodes belonging to different sensing electrode groups are connected to different pins of the touch wafer.

According to the above description, the single-layer multi-point mutual-capacitive touch screen provided by the present invention comprises: a first sensing electrode group to a mth sensing electrode group arranged in a first direction; wherein m is greater than 1 Integer. Each of the sensing electrode groups includes a first electrode unit extending in a second direction and a second electrode unit extending in a second direction; the first electrode unit and the second electrode unit are oppositely disposed in a first direction; the second direction is perpendicular to a first direction; in the second direction, the first electrode unit comprises a first first electrode to an nth first electrode, wherein n is a positive integer greater than 1; the second electrode unit comprises at least one second electrode; a plurality of bonding pads arranged in a first direction, a plurality of bonding pads are disposed at the first ends of the m sensing electrode groups, and the first electrodes and the second electrodes of the m sensing electrode groups are respectively connected to the corresponding bonding pads; a first lead wire for connecting the first electrode to the corresponding bonding pad; a plurality of second leads for connecting the second electrode to the corresponding bonding pad; wherein the first electrode and the second electrode One of them is used as a touch sensing electrode, and the other is used as a touch driving electrode; in the same first electrode unit, any two adjacent first electrodes are partially disposed opposite each other in the first direction.

Since the two first electrodes adjacent to the same first electrode unit are partially disposed opposite to each other in the first direction, such that in the two adjacent first electrodes of the same first electrode unit, the two are not opposite in the first direction. The part can form an inductive node with the corresponding second electrode, and the opposite part can also form an inductive node with the corresponding second electrode, thereby increasing the number of sensing nodes and improving the touch precision. The invention increases the number of sensing nodes by providing the opposite portions of the first electrode and the first electrode, and can reduce the number of the first electrode and the second electrode, reducing the number of wirings and bonding pads, and reducing the width of the wiring dead zone. Improve touch accuracy and reduce production costs.

11‧‧‧Bound area

12‧‧‧Capacitive sensing node

13‧‧‧Join pad

14‧‧‧First lead

15‧‧‧second lead

131‧‧‧Electronic equipment

132‧‧‧Single layer multi-point mutual capacitive touch screen

21‧‧‧First electrode unit

22‧‧‧Second electrode unit

23‧‧‧Material pads

24‧‧‧Capacitive sensing node

25‧‧‧second lead

26‧‧‧First lead

27‧‧‧Induction electrode set

28‧‧‧Capacitive sensing node

29‧‧‧Composite coupling capacitor

41‧‧‧jumper

42‧‧‧through hole

43‧‧‧through hole

71‧‧‧First electrode

72‧‧‧second electrode

81‧‧‧First electrode

82‧‧‧second electrode

X1-X4‧‧‧ first electrode

Y1-Y15‧‧‧ second electrode

D1‧‧‧first branch electrode

D2‧‧‧Second branch electrode

X11‧‧‧first comb electrode

X12‧‧‧Second comb electrode

L0‧‧‧Wiring blind spot

L‧‧‧Wiring blind spot

X‧‧‧ first direction

Y‧‧‧second direction

[Fig. 1] is a schematic diagram of a topological structure of a single-layer mutual-capacitive touch screen commonly seen in the prior art.

2 is a schematic diagram of a topological structure of a single-layer multi-point mutual-capacity touch screen provided by an embodiment of the present invention.

[FIG. 3] FIG. 3 is a schematic diagram showing the topology of another single-layer multi-point mutual-capacity touch screen provided by an embodiment of the present invention.

[FIG. 4a] FIG. 4 is a schematic diagram showing the topology of a single-layer multi-point mutual-capacity touch screen provided by an embodiment of the present invention.

[Fig. 4b] Fig. 4 is a schematic diagram showing the topology of a single-layer multi-point mutual-capacity touch screen provided by an embodiment of the present invention.

[Fig. 4c] is a schematic diagram of a topology structure of another single-layer multi-point mutual-capacity touch screen provided by the embodiment of the present invention.

[Fig. 4d] is a schematic diagram of a topology structure of another single-layer multi-point mutual-capacity touch screen provided by the embodiment of the present invention.

[Fig. 5a] is a detailed structural diagram of a preferred embodiment of a sensing electrode group of the single-layer multi-point mutual capacitive touch screen shown in Fig. 2.

[Fig. 5b] is a detailed structural diagram of a preferred embodiment of each of the sensing electrode groups of the single-layer multi-point mutual-capacity touch screen shown in Fig. 2.

[Fig. 5c] Another single-layer multi-point mutual-capacity touch screen provided by the embodiment of the present invention A detailed structural diagram of a preferred embodiment of each of the sensing electrode sets.

[Fig. 6a] is a detailed structural diagram of a preferred embodiment of a sensing electrode group of the single-layer multi-point mutual-capacity touch screen shown in Fig. 3.

[Fig. 6b] is a detailed structural diagram of a preferred embodiment of each of the sensing electrode groups of the single-layer multi-point mutual-capacity touch screen shown in Fig. 3.

[FIG. 6c] FIG. 6 is a detailed structural diagram of a preferred embodiment of each of the sensing electrode groups of the single-layer multi-point mutual-capacitive touch screen provided by the embodiment of the present invention.

[Fig. 7] is a schematic diagram of a topology of an existing single-layer multi-point mutual-capacitive touch screen.

[Fig. 8] is a schematic diagram of the topology of another existing single-layer multi-point mutual-capacitive touch screen.

[FIG. 9] FIG. 9 is a schematic diagram of a topology structure of another single-layer multi-point mutual-capacity touch screen provided by an embodiment of the present invention.

FIG. 10 is a schematic diagram showing the topology of a single-layer multi-point mutual-capacity touch screen provided by an embodiment of the present invention.

FIG. 11 is a schematic diagram showing the topology of another single-layer multi-point mutual-capacity touch screen provided by an embodiment of the present invention.

[12] FIG. 12 is a schematic diagram of a topology structure of another single-layer multi-point mutual-capacity touch screen provided by an embodiment of the present invention.

FIG. 13 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

The technology in the embodiment of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. The present invention is described in a clear and complete manner, and it is obvious that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the inventive scope are the scope of the invention.

In addition, the word "a plurality of words" in the following description contains two or more.

The embodiment of the present invention provides a single-layer multi-point mutual-capacitive touch screen, and FIG. 2 is a schematic diagram of a top-layer structure of a single-layer multi-point mutual-capacity touch screen according to an embodiment of the present invention. The multi-point mutual capacitive touch screen includes a plurality of sensing electrode groups 27, a plurality of bonding pads 23, a first lead 26, and a second lead 25.

The plurality of sensing electrode groups 27 include first to mth sensing electrode groups 27 to 27 arranged in the first direction (X-axis direction). Where m is a positive integer greater than one. Referring to FIG. 2, in the embodiment shown in FIG. 2, m=4 is taken as an example, and the first sensing electrode group 27 to the fourth sensing electrode group 27 are shown.

Each of the sensing electrode groups 27 includes a first electrode unit 21 extending in a second direction (Y-axis direction) and a second electrode unit 22 extending in a second direction. The first electrode unit 21 and the second electrode unit 22 are oppositely disposed in the first direction to form the capacitive sensing nodes 24 and 28, and the capacitance change of each of the capacitive sensing nodes 24 is tested by a touch wafer (not shown) to determine the user. Touch location information. The second direction is perpendicular to the first direction.

In the second direction, the first electrode unit 21 includes a first first electrode to an nth first electrode. Where n is a positive integer greater than 1, and in the embodiment shown in FIG. 2, n=7 is taken as an example. Description will be made showing the first first electrode to the seventh first electrode. The second electrode unit 22 includes a plurality of second electrodes in the second direction.

The plurality of bonding pads 23 are arranged in the first direction, the plurality of bonding pads 23 are disposed at the first ends of the m sensing electrode groups 27, and the first electrodes and the second electrodes of the m sensing electrode groups 27 are respectively associated with the corresponding bonding pads 23 Corresponding connection. The first end is an end of the first first electrode adjacent to the m sensing electrode groups 27, that is, in FIG. 2, the upper end of the single-layer multi-point mutual capacitive touch screen is the first end, and the lower end is the second end. The direction of the connection from the first end to the second end is the second direction.

The first lead 26 is used to connect the first electrode to the corresponding bond pad 23. The second lead 25 is used to connect the second electrode to the corresponding bonding pad 23.

Wherein one of the first electrode and the second electrode is used as a touch sensing electrode and the other is used as a touch driving electrode. In the same first electrode unit 21, adjacent first electrodes are partially disposed opposite each other in the first direction.

Since the two first electrode portions adjacent to the same first electrode unit 21 are oppositely disposed in the first direction, such that in the two adjacent first electrodes of the same first electrode unit 21, the two are in the first side The upwardly non-opposing portions may respectively form a capacitive sensing node 24 with the corresponding second electrode. The capacitive sensing node 24 includes a coupling capacitance of a single first electrode and a second electrode. When the touch is in this region, the single capacitance changes. At the same time, the opposite portion of the two in the first direction may also form a capacitive sensing node 28 with the corresponding second electrode, and the capacitive sensing node 28 includes a composite coupling capacitor of the adjacent two first electrodes and the same second electrode. When the touch occurs in this area, the two capacitors change at the same time, so that it can be distinguished whether the touch position is in the area of the capacitive sensing node 24 or the capacitive sensing node 28, so the present technology is in the physical size of the electrode. In the same case, the number and type of capacitive sensing nodes are increased, and the touch precision is improved.

The invention increases the number of capacitive sensing nodes by providing a first electrode and a first electrode, and can reduce the number of the first electrode and the second electrode, reduce the number of wirings and bonding pads 23, and reduce the wiring dead zone. The width of the touch increases the touch accuracy and reduces the production cost.

Referring to FIG. 2 again, in FIG. 2, in the second direction, the second electrode unit 22 includes a first second electrode to a kth second electrode, and k is a positive integer greater than one. For the i-th second electrode, i is a positive integer smaller than k, and in the first direction, the i-th second electrode is disposed opposite to the i-th first electrode portion, and is opposite to the (i+1)th first electrode portion Relative settings. k=n-1, the kth second electrode is disposed opposite to the n-1th first electrode portion, and is disposed opposite to the nth first electrode portion.

For a single-layer multi-point mutual-capacity touch screen with a length of 15 Pitch, if the embodiment shown in FIG. 1 is adopted, each second electrode has a length of 1 Pitch, and one sensing electrode group has one first. The electrodes and the 15 second electrodes form 15 capacitive sensing nodes 12, requiring 16 wirings (1 first lead 14, 15 second leads 15). For all four sensing electrode groups, a total of 60 capacitive sensing nodes 12 are formed, requiring 64 wirings. The length defined in the present invention is the dimension in the second direction. Wherein, the pitch is a set length value.

In the embodiment shown in FIG. 2, the length of one second electrode is set to 2.5 Pitch, the length of the first first electrode and the seventh first electrode are both 1.5 Pitch, and the length of the other first electrodes is 3 Pitch. The length of the opposite portion between the two adjacent first electrodes in the first direction is 0.5 Pitch. At this point, the total length is still 15Pitch. One sensing electrode group 27 There are seven first electrodes and six second electrodes, forming 18 capacitive sensing nodes, requiring 13 wires (7 first leads 26, 6 second leads 25). For all four sensing electrode groups 27, a total of 72 sensing nodes 24 are formed, requiring 52 wirings. It can be seen that, with respect to the conventional structure shown in FIG. 1, the embodiment shown in FIG. 2 reduces the number of wirings while increasing the number of capacitance sensing nodes, thereby reducing the number of bonding pads 23 and the width of the wiring dead zone L. Therefore, the cost is reduced and the touch precision is improved. The width is the size in the first direction. For the reduction of the width of the wiring blind zone L, more sensing electrode groups 27 can be disposed in the single-layer multi-point mutual capacitive touch screen of the set width, thereby further improving the touch precision. In other words, instead of providing more sensing electrode groups 27, the width of the FPC that is bonded to the bonding pads 23 of the single-layer multi-point mutual-capacity touch screen shown in FIG. 2 is correspondingly reduced, thereby saving FPC. The manufacturing cost, accordingly, the cost of the electronic device 131 including the single-layer multi-point mutual-capacitive touch screen and the FPC (see Fig. 13 described later) is low.

It should be noted that the sensing electrode groups 27 in the above-mentioned FIG. 2 are arranged in mirror symmetry. However, the sensing electrode groups 27 are not limited to being mirror-symmetrically arranged, and may be the structure of each sensing electrode group 27. The same, arranged in an array with each other. Preferably, the leads located in the area between adjacent sensing electrode groups 27 are the same type of leads, that is, the leads in the area between adjacent sensing electrode groups 27 cannot have both the first lead 26 and the second lead 25, Thereby reducing coupling interference.

FIG. 3 is a schematic diagram of a topological structure of another single-layer multi-point mutual-capacitive touch screen according to an embodiment of the present invention, and FIG. 3 shows a single-layer multi-point mutual-capacitive touch screen having four Sensing electrode group 27, that is, m=4, the first electrode unit 21 has six first electrodes, That is, n=6. At this time, k=n, the entire kth second electrode is disposed opposite to a part of the nth first electrode. In the same second electrode unit 22, at least partially adjacent second electrodes are partially disposed opposite each other in the first direction. When the length of the last second electrode in the second direction is shorter, the second electrode unit may be disposed opposite to the previous second electrode in the first direction, as shown in FIG.

As can be seen from FIG. 3, in addition to forming all of the individual first and second electrode capacitive sensing nodes 24 of FIG. 2, adjacent first electrodes and capacitive sensing nodes 28 of the same second electrode are formed. The composite coupling capacitor 29 of the adjacent second electrode and the same first electrode, so that the number and type of the capacitive sensing nodes are further increased under the condition that the physical dimensions of the electrodes remain unchanged.

In the method of FIG. 3, in one sensing electrode group 27, the length of the first first electrode and the last first electrode are set to 1.5 Pitch, the lengths of the other first electrodes are 3.5 Pitch, and the two phases in the first direction are The length of the adjacent first electrode is 0.5Pitch, and the length of the last second electrode is 0.5Pitch, and the length of the other second electrode is 3Pitch. In the first direction, the length of the opposite portion of the adjacent two second electrodes is The 0.5Pitch, single-layer multi-point, mutual-capacity touch screen still has a total length of 15Pitch. One sensing electrode group 27 has six first electrodes and six second electrodes, forming 20 sensing nodes, requiring 12 wirings (6 first leads 26, 6 second leads 25). For all four sensing electrode groups 27, a total of 80 capacitive sensing nodes are formed, requiring 48 wirings. Similarly, with respect to the conventional structure shown in FIG. 1, the embodiment shown in FIG. 3 reduces the number of the first lead 26 and the second lead 25 while increasing the number of capacitive sensing nodes, thereby reducing the bonding pad 23. The number and the width of the wiring dead zone L. Therefore, the cost is reduced and the touch precision is improved.

In the first direction, the length of the opposite portions of the adjacent two first electrodes and the length of the opposite portions of the adjacent two second electrodes may be set to any value within the interval (0 Pitch, 1.5 Pitch) according to the size requirement.

In the embodiment of the present invention, any of the first leads 26 and the first leads 26 do not intersect, and any of the second leads 25 and the second leads 25 do not intersect, and any of the first leads 26 and any of the second leads 25 do not intersect. So that the first lead 26 and the second lead 25 can be disposed in the same layer, which reduces the manufacturing process difficulty and the thickness of the screen.

Preferably, the setting m is an even number. In any two adjacent sensing electrode groups 27, the first electrode unit 21 is disposed adjacent to the first electrode unit 21, or the second electrode unit 22 is opposite to the second electrode unit 22. Neighbor settings. The adjacent sensing electrode groups 27 are arranged in mirror symmetry, thereby improving the linearity and accuracy of the touch sensing.

In the above embodiment, in the two adjacent sensing electrode groups 27 disposed adjacent to the first electrode unit 21 and the first electrode unit 21, the last of the first electrode units 21 of the two adjacent sensing electrode groups 27 One first electrode is connected to the same bonding pad 23 by the same first lead 26, and the other first electrodes of the first electrode unit 21 of two adjacent sensing electrode groups 27 are connected by a separate first lead 26 to the corresponding bonding pad 23. . All of the first leads 26 of the two adjacent sensing electrode groups 27 are connected to the corresponding bonding pads 23 by the corresponding first electrodes in the opposite direction of the second direction.

In the two adjacent sensing electrode groups 27 disposed adjacent to the second electrode unit 22 and the second electrode unit 22, the second electrodes of the second electrode units 22 of the two adjacent sensing electrode groups 27 are each used separately. The second lead 25 is connected to the corresponding bonding pad 23. Two adjacent sensing electrodes All of the second leads 25 of the group 27 are connected to the corresponding bonding pads 23 by the opposite ends of the corresponding second electrodes in the second direction.

The width of the wiring dead zone can be further reduced by the jumper and the via hole to further improve the touch precision.

In the two adjacent sensing electrode groups 27 disposed adjacent to the first electrode unit 21 and the first electrode unit 21, the first electrodes of the two first electrode units 21 are divided into the first portion and the second portion in the second direction. Two parts. If n is an even number, the number of the first electrodes of the first portion and the second portion is the same. If n is an odd number, the first portion has one less electrode than the second portion in order to reduce the number of wires.

In the second direction, the last first electrode of the two first portions is connected to the corresponding bonding pad 23 by the same first lead 26, which can further reduce the number of leads without the problem of crossover between the leads. The other first electrodes of the two first portions are each connected to the corresponding bonding pad 23 by a separate first lead 26, and the first lead 26 corresponding to the first electrode of the first portion is in the second direction by the corresponding first electrode. The opposite direction is connected to the corresponding bonding pad 23.

In the second direction, the first first electrodes of the two second portions are connected to the corresponding bonding pads 23 by the same first lead, which can further reduce the number of leads without the problem of crossover between the leads. The other first electrodes of the two second portions are each connected to the corresponding bonding pads 23 by a separate first lead 26, and the first leads 26 corresponding to the first electrodes of the second portion are both by the corresponding first electrodes along the second The direction is connected to the via hole disposed at the second end of the m sensing electrode groups 27, and is connected to the corresponding bonding pad 23 through a jumper connected to the via hole, and the second end is opposite to the first end, and each jumper connection is different Bonding pad 23.

In the two adjacent sensing electrode groups 27 disposed adjacent to the second electrode unit 22 and the second electrode unit 22, the second electrodes of the two second electrode units 22 are divided into the first portion and the second portion in the second direction. Two parts. If k is an even number, the number of the second electrodes of the first portion and the second portion is the same. If k is an odd number, the first portion is one less electrode than the second portion. The second electrodes of the two first portions are each connected to the corresponding bonding pad 23 by a separate second lead 25, and the second lead 25 corresponding to the second electrode of the first portion is reversed by the corresponding second electrode in the second direction. The direction is connected to the corresponding bonding pad 23.

The second electrodes of the two second portions are each connected to the corresponding bonding pads 23 by a separate second lead 25, and the second leads 25 corresponding to the second electrodes of the second portion are all in the second direction by the corresponding second electrodes. Connected to the vias disposed at the second ends of the m sensing electrode groups 27, and connected to the corresponding bonding pads 23 through jumpers connected to the via holes, the second end is disposed opposite to the first end, and each jumper is connected differently Bonding pad 23.

In two adjacent sensing electrode groups 27, for the first electrodes of the two second portions: the first leads 26 of the two first electrodes facing in the first direction are connected to the corresponding bonding pads 23 through the same jumper, The jumper is electrically connected to the corresponding lead through the via. In two adjacent sensing electrode groups 27, for the second electrode of the second portion of the same second electrode unit 22, the odd second electrodes are connected to the same jumper, and the even second electrodes are connected to the same jumper. In this way, it is possible to ensure multi-touch detection while reducing the number of jumpers and reducing the manufacturing cost.

It should be noted that the sensing electrode groups 27 in the above-mentioned FIG. 3 are arranged in mirror symmetry. However, the sensing electrode groups 27 are not limited to being mirror-symmetrically arranged, and may be the structure of each sensing electrode group 27. The same, arranged in an array with each other. Preferably located adjacent The leads in the region between the sensing electrode groups 27 are the same type of leads, that is, the leads in the region between the adjacent sensing electrode groups 27 cannot have both the first lead 26 and the second lead 25, thereby reducing coupling interference.

Referring to FIG. 4a, a schematic diagram of a topology of a single-layer multi-point mutual-capacity touch screen provided by an embodiment of the present invention is provided. The embodiment shown in Fig. 4a further reduces the width of the wiring dead zone based on the above-described jumper and via. The single-layer multi-point mutual-capacitive touch screen includes a display area and a border area surrounding the display area, and each of the sensing electrode groups 27 is disposed in the display area. The bonding pad 23 is disposed at the first end of the single-layer multi-point mutual capacitive touch screen. The start end of each jumper 41 is disposed at the second end of the single-layer multi-point mutual-capacitive touch screen, and is connected to the corresponding joint through the left or right side border area of the single-layer multi-point mutual-capacitive touch screen. Pad 23. The jumper 41 is located above the metal layer where the first lead 26 and the second lead 25 are located, and has an insulating layer between the jumper 41 and the metal layer. The jumper 41 is electrically connected to the corresponding lead through the via 42 to facilitate electrical connection of the lead to the corresponding bond pad 23.

In Fig. 4a, the first sensing electrode group 27 and the second sensing electrode group 27 are disposed adjacent to the second electrode unit 22, and the second sensing electrode group 27 and the third sensing electrode group 27 are first. The electrode units 21 are disposed adjacent to each other. As described above, the first electrode unit 21 and the second electrode unit 22 of each of the sensing electrode groups 27 are divided into a first portion and a second portion. m=4, n=7, k=6, for the first electrode unit, the first portion thereof comprises the first three first electrodes, the second portion thereof comprises the last four first electrodes, and for the second electrode unit 22, The first part contains the first three second electrodes and the second part contains the last three second electrodes.

In the second sensing electrode group 27 and the third sensing electrode group 27, in the first portion, the first to third first electrodes are each connected to the corresponding bonding by a separate first lead 26 The pad 23, the first lead 26 corresponding to the first electrode of the first portion is connected to the corresponding bonding pad 23 by the corresponding first electrode in the opposite direction of the second direction. Preferably, the third first electrode of the two first portions may also be connected to the corresponding bonding pad by the same first lead 26, without reducing the number of leads without causing the lead to cross.

In the second part, the fourth to seventh first electrodes are each connected to the corresponding bonding pad 23 by a separate first lead 26, and the first lead 26 corresponding to the first electrode of the second portion is correspondingly The first electrode is connected to the via hole 42 disposed at the second end in the second direction, and is connected to the corresponding bonding pad 23 through the jumper 41 connected to the via hole 42, and each jumper 41 is connected to a different bonding pad 23. Preferably, the fourth first electrode of the two first portions may also be connected to the corresponding bonding pad 23 by the same first lead 26, and the number of leads is reduced without causing the lead to cross.

For the first electrodes of the two second portions, the first leads 26 of the two first electrodes facing in the first direction are connected to the corresponding bonding pads 23 through the same jumper, and the vias are passed through the vias between the jumpers and the corresponding leads. 42 electrical connection reduces the number of bond pads 23 and jumpers 41 while achieving touch detection. Specifically, the two fourth first electrodes respectively connect the same jumper 41 disposed at the second end through the corresponding first lead wires, thereby connecting the same corresponding bonding pads 23. The two fifth first electrodes are respectively connected to the same jumper 41 disposed at the second end through the corresponding first lead 26, thereby connecting the same corresponding bonding pads 23. The two sixth first electrodes are respectively connected to the same jumper 41 disposed at the second end through the corresponding first lead 26, thereby connecting the same corresponding bonding pads 23. The two seventh first electrodes are respectively connected to the same jumper 41 disposed at the second end through the corresponding first lead 26, thereby connecting the same corresponding bonding pads 23.

In the first sensing electrode group 27 and the second sensing electrode group 27, in the first portion In the sub-portion, the first to third second electrodes are each connected to the corresponding bonding pad 23 by a separate second lead 25, and the second lead 25 corresponding to the second electrode of the first portion is formed by the corresponding second electrode The opposite direction of the second direction is connected to the corresponding bonding pad 23.

In the second part, the fourth to sixth second electrodes are each connected to the corresponding bonding pad 23 by a separate second lead 25, and the second lead 25 corresponding to the second electrode of the second portion is correspondingly The second electrode is connected to the via hole 42 disposed at the second end in the second direction, and is connected to the corresponding bonding pad 23 through the jumper 41 connected to the via hole 42.

For the second electrodes of the two second portions, the second electrodes of the second portion of the same second electrode unit 22, the odd second electrodes are connected to the same jumper 41, and the even second electrodes are connected to the same jumper 41. Specifically, the fourth second electrode of the first sensing electrode group 27 is connected to the same jumper 41 as the sixth second electrode, and the fourth second electrode and the sixth second of the second sensing electrode group 27 are connected. The electrodes are connected to the same jumper 41. For the second electrode unit 22, the second electrodes located in different groups are connected to different jumpers 41.

Referring to FIG. 4b, it is a schematic diagram of a topology structure of another single-layer multi-point mutual-capacity touch screen provided by an embodiment of the present invention. 4b is a diagram based on FIG. 4a, the first leads corresponding to the first electrodes of the two first portions are connected to the corresponding vias 43 disposed at the first end, and are connected to the jumpers connected to the vias 43 and corresponding The bonding pads 23 are connected.

The second leads 25 corresponding to the second electrodes of the two first portions are all connected to the corresponding via holes 43 disposed at the first end, and are connected to the corresponding bonding pads 23 through jumpers connected to the via holes 43.

For the first electrode connected to the corresponding bonding pad 23 through the jumper and the via hole 43, The first leads 25 of the two first electrodes facing in the first direction are connected to the corresponding bonding pads 23 through the same jumper, and the jumpers are electrically connected to the corresponding leads through the vias 43. For the second electrode connected to the corresponding bonding pad 23 through the jumper and via 43, the odd numbered second electrodes are connected to the same jumper, and the even second electrodes are connected to the same jumper.

One of the first electrode unit 21 and the second electrode unit 22 is defined as a first type of electrode unit, and the other is a second type of electrode unit. The leads of the respective electrodes of all of the first type of electrode units are connected to the corresponding bonding pads 23 in the opposite direction of the second direction. The leads of the electrodes of all the second type electrode units are connected to the via holes 42 disposed at the second ends of the m sensing electrode groups 27 in the second direction, and are connected to the corresponding bonding pads through the jumpers 41 connected to the via holes 42. 23, the second end is opposite to the first end, and each jumper 41 is connected to a different bonding pad 23.

As shown in FIG. 4c, a schematic diagram of a topology of a single-layer multi-point mutual-capacity touch screen provided by an embodiment of the present invention is shown in FIG. 4c, in which the first electrode unit 21 is the first type of electrode unit, and the second The electrode unit 22 is a second type of electrode unit, and the adjacent sensing electrode group 27 and the sensing electrode group 27 are mirror-symmetrical. All of the leads of the first electrode unit 21 are connected to the corresponding bonding pads 23 in the opposite direction of the second direction. The leads of all of the second electrode units 22 are connected to the corresponding bonding pads 23 through the vias 42 disposed at the second end and the jumpers 41 in the second direction.

As shown in FIG. 4d, a schematic diagram of a topology of a single-layer multi-point mutual-capacitive touch screen provided by an embodiment of the present invention is provided. The lead wires of the electrodes of the first type of electrode unit are connected to the first end. The via hole 43 is connected to the corresponding bonding pad 23 through a jumper connected to the via hole 43.

In other embodiments, the first electrode unit 21 can also be set to be the second type of electricity. The pole unit, the second electrode unit 22 is a first type of electrode unit.

In the embodiment of the present invention, the first electrode unit 21 and the second electrode unit 22 of the first sensing electrode group 27 are sequentially arranged in the first direction as an example. In other embodiments, the second electrode unit 22 of the first sensing electrode group 27 and the first electrode unit 21 may be sequentially arranged in the first direction.

In addition, in other embodiments, the sensing electrode groups 27 of FIGS. 4a to 4b may not be limited to be mirror-symmetrically arranged, or the sensing electrode groups 27 may have the same structure and arranged in an array.

Referring to FIG. 5a, a detailed structural diagram of a preferred embodiment of a sensing electrode group 27 of the single-layer multi-point mutual capacitive touch screen shown in FIG. 2 is shown. In the sensing electrode group shown in FIG. 5a, n=3, k=2, that is, the first electrode unit 21 includes a first first electrode X1, a second first electrode X2, and a third first electrode X3. The second electrode unit 22 includes a first second electrode Y1 and a second second electrode Y2. Each of the first electrodes includes a first comb-shaped electrode x11 and a second comb-shaped electrode x12 that are partially disposed opposite each other in the first direction.

The first comb-shaped electrode x11 of the first first electrode X1 and the second comb-shaped electrode x12 are flush with the first end, and the first comb-shaped electrode x11 of the n-th first electrode corresponds to the second comb-shaped electrode x12. The two ends are flush.

Each of the first comb-shaped electrode x11 and the second comb-shaped electrode x12 includes a plurality of first branch electrodes D1. The first branch electrode D1 of the first comb-shaped electrode x11 is along the first direction, and the first branch electrode D1 of the second comb-shaped electrode x12 is in the opposite direction of the first direction. The first comb-shaped electrode x11 is electrically connected to the second comb-shaped electrode x12. For the first comb-shaped electrode x11 and the second comb-shaped electrode x12 in the second direction The upper opposite portion: the first branch electrode D1 of the first comb-shaped electrode x11 and the first branch electrode D1 of the second comb-shaped electrode x12 are in one-to-one correspondence.

In the same first electrode unit 21, the length of the first comb-shaped electrode x11 and the second comb-shaped electrode x12 of the first first electrode in the second direction is different, and the first comb of the n-th first electrode The length of the electrode x11 and the second comb-shaped electrode x12 in the second direction is different. The first comb-shaped electrode x11 of the other first electrode and the second comb-shaped electrode x12 have the same length in the second direction.

Each of the second electrodes includes a plurality of second branch electrodes D2, and the second branch electrodes D2 are disposed between the first comb-shaped electrodes x11 and the second comb-shaped electrodes x12. The second branch electrode D2 includes a first branch unit extending in a reverse direction in the first direction and a second branch unit extending in the first direction. The first branch unit bit is coupled between the two first branch electrodes D1 of the corresponding first comb-shaped electrode x11 and the corresponding two first branch electrodes D1. The second branch cell is coupled between the two first branch electrodes D1 of the corresponding second comb electrode x12 and the corresponding two first branch electrodes D1.

For the first first electrode X1, the first first branch electrode D1 of the first comb-shaped electrode x11 and the first first branch electrode D1 of the second comb-shaped electrode x12 are electrically connected in the second direction. Alternatively, for the first first electrode X1, in the second direction, the first first branch electrode D1 of the first comb-shaped electrode x11 and the first first branch electrode D1 of the second comb-shaped electrode x12 thereof are One piece structure.

For the nth first electrode, the last first branch electrode D1 of the first comb tooth electrode x11 and the last first branch of the second comb tooth electrode x12 thereof in the second direction The electrode D1 is electrically connected. For the pth first electrode, one first branch electrode D1 of the first comb-shaped electrode x11 is electrically connected to one first branch electrode D1 of the second comb-shaped electrode x12, and the two first branch electrodes electrically connected are in the Relatively arranged in one direction, p is a positive integer greater than 1 and less than n. In Fig. 5a, n = 3 and p = 2.

Referring to FIG. 6a, it is a detailed structural diagram of a sensing electrode group of the single-layer multi-point mutual capacitive touch screen shown in FIG. In Fig. 6a, similarly, n=3, k=2, the two comb-shaped electrodes of the first first electrode X1 are connected in the same manner as in the fifth graph, and for the qth first electrode, the first comb is One first branch electrode D1 of the electrode x11 is electrically connected to a first branch electrode D1 of the second comb-shaped electrode x12, and the two first branch electrodes D1 electrically connected are dislocated in the first direction, that is, the first The directions are not oppositely arranged, such that two adjacent second electrodes in the same second electrode unit are partially disposed opposite each other in the first direction. q is a positive integer greater than 1 and not greater than n. In Figure 6a, p can be 2 or 3.

For any of the sensing electrode groups 27, the connection directions of the first electrode unit 21 and the second electrode unit 22 are both in the first direction or in the opposite directions of the first direction.

Referring to FIG. 5b, a detailed structural diagram of a preferred embodiment of each sensing electrode group of the single-layer multi-point mutual capacitive touch screen shown in FIG. 2, mirroring the adjacent sensing electrode groups 27 in the first direction Symmetrical settings. FIG. 5C is a schematic diagram showing a specific structure of a preferred embodiment of each sensing electrode group of a single-layer multi-point mutual-capacitive touch screen according to an embodiment of the present invention, for any sensing electrode group 27: a first electrode The connection direction of the unit 21 and the second electrode unit 22 is the first direction. Both Fig. 5b and Fig. 5c are single-layer multi-point mutual capacitive touch screens based on the sensing electrode group 27 of the structure shown in Fig. 5a.

Referring to FIG. 6b, a detailed structural diagram of a preferred embodiment of each sensing electrode group of the single-layer multi-point mutual-capacitive touch screen shown in FIG. 3, two sensing electrode groups adjacent in the first direction 27 mirror symmetrical settings. FIG. 6C is a schematic diagram showing a specific structure of each sensing electrode group of a single-layer multi-point mutual-capacitive touch screen according to an embodiment of the present invention. The sensing electrode groups 27 have the same structure. The sensing electrode groups 27 are arranged in an array. Both Fig. 6b and Fig. 6c are single-layer multi-point mutual-capacitive touch screens based on the sensing electrode group of the structure shown in Fig. 6a.

In the following, the embodiment of the two adjacent sensing electrode groups 27 is mirror-symmetrical, and the technical solution of the embodiment of the present invention can greatly reduce the number of leads, thereby reducing the number of bonding pads 23 and the width of the wiring dead zone, and improving the touch. Accuracy and cost reduction. Taking a five-inch screen as an example, generally 8 pitches in the first direction and 15 pitches in the second direction are generally provided.

It is to be noted that the first electrode and the second electrode in each of the sensing electrode groups 27 of the present invention are not limited to those shown in FIGS. 5a, 5b, 5c, 6a, 6b, and 6c. The specific structure may also be other suitable types of specific structures.

As shown in FIG. 7, FIG. 7 is a schematic diagram of a topological structure of a conventional single-layer multi-point mutual-capacitive touch screen. One sensing electrode group includes one first electrode 71 and 15 second electrodes 72. The first electrode 71 has a length of 15 pitches and the second electrode 72 has a length of 1 pitch. At this time, one sensing electrode group requires 16 leads (1 first lead, 15 second leads), and the eight sensing electrode groups require a total of 16*8=128 leads. There are 30 second leads in the wiring dead zone between the adjacent two sensing electrode groups. One sensing electrode group forms 15 capacitive sensing nodes, and the eight sensing electrode groups have a total of 15*8=120 sensing nodes.

As shown in FIG. 8 , FIG. 8 is a schematic diagram of a topology of another conventional single-layer multi-point mutual-capacitive touch screen, wherein one sensing electrode group includes eight first electrodes 81 and eight second electrodes. 82. In the same sensing electrode group, it may be disposed in the Y direction, the first first electrode 81 has a length of 1 pitch, the other first electrodes 81 have a length of 2 pitches, and the last second electrode 82 has a length of 1 pitch. The other second electrode 82 has a length of 2 pitches. At this time, one sensing electrode group requires 16 leads (8 first leads, 8 second leads) to form 15 capacitive sensing nodes. The embodiment shown in Fig. 8 also has 16*8=128 leads and 15*8=120 capacitive sensing nodes. There are 16 second leads in the wiring dead zone between two adjacent sensing electrode groups.

As shown in FIG. 9 , FIG. 9 is a schematic diagram of a topology of a single-layer multi-point mutual-capacity touch screen according to an embodiment of the present invention, and FIG. 9 shows an embodiment of the sensing electrode group 27 The structure and layout of the first electrode unit 21 and the second electrode unit 22 are the same as those of the first electrode unit 21 and the second electrode unit 22 of the sensing electrode group of the embodiment shown in FIG. 2, except that FIG. Four sensing electrode groups 27 are added compared to FIG. 2, and FIG. 9 has eight sensing electrode groups 27 in the first direction. In Figure 9, there are 13*8=104 leads and 18*8=144 capacitive sensing nodes. The wiring dead zone between two adjacent sensing electrode groups 27 has a total of 12 second leads or 14 first leads. It can be seen that compared with the embodiment of FIG. 7 and FIG. 8, the number of leads is reduced (and thus the number of bonding pads is reduced), the number of leads in the dead zone is reduced, and the number of capacitive sensing nodes is increased. Therefore, the touch precision is effectively improved, and the manufacturing cost is reduced. Moreover, the width of the wiring dead zone can be reduced, and the touch precision can be further improved.

10 is a schematic diagram of a topological structure of another single-layer multi-point mutual-capacitive touch screen according to an embodiment of the present invention, and is implemented in FIG. 10 . The structure and layout of the first electrode unit 21 and the second electrode unit 22 in the mode sensing electrode group are the same as those of the first electrode unit 21 and the second electrode unit 22 in the sensing electrode group 27 of the embodiment shown in FIG. The difference is that, in each of the sensing electrode groups 27, in the second direction, the first lead corresponding to the first three first electrodes and the second lead corresponding to the first three second electrodes are all in the opposite direction of the second direction and corresponding The bonding pads are connected, and the first leads corresponding to the other first electrodes and the second leads corresponding to the other second electrodes are connected to the corresponding jumpers 41 through the corresponding via holes 42 disposed at the second end in the second direction, thereby achieving the corresponding bonding. Pad connection.

In Fig. 10, the number of leads is the same as that of Fig. 9, but with respect to the embodiment of Fig. 9, the leads of the wiring dead zone are divided into two different directions, and the width of the wiring dead zone is further shortened. Moreover, according to the above jumper setting method, the method of multiplexing the first lead and the shared jumper can further reduce the number of leads and the bonding pads, reduce the cost, and improve the touch precision.

11 is a schematic diagram of a topological structure of another single-layer multi-point mutual-capacitive touch screen according to an embodiment of the present invention, and FIG. 11 is the first embodiment of the sensing electrode group. The structure and layout of the one electrode unit 21 and the second electrode unit 22 are the same as those of the first electrode unit 21 and the second electrode unit 22 in the sensing electrode group of the embodiment shown in FIG. 3, except that the 11th phase There are four more sensing electrode groups than in Figure 3, and Figure 11 has eight sensing electrode groups 27 in the first direction. In Fig. 11, there are 12*8=96 leads and 20*8=160 sensing nodes. There are 12 leads in the wiring dead zone between the adjacent two sensing electrode groups 27. It can be seen that, compared with the embodiment of FIG. 7 and FIG. 8 , the number of leads and the width of the wiring dead zone are reduced, the touch precision is effectively improved, and the manufacturing cost is reduced.

If the embodiment shown in FIG. 12 is adopted, FIG. 12 is provided according to an embodiment of the present invention. FIG. 12 is a schematic diagram showing the topology of a single-layer multi-point mutual-capacitive touch screen, and the structure and layout of the first electrode unit 21 and the second electrode unit 22 in the sensing electrode group of the embodiment shown in FIG. The structure and layout of the first electrode unit 21 and the second electrode unit 22 in the sensing electrode group 27 are the same, except that in the second sensing direction, the first two electrodes correspond to the first electrode. A lead 26 and a second lead 25 corresponding to the first three second electrodes are connected to the corresponding bonding pads 23 in the opposite direction of the second direction, and the first lead 26 corresponding to the other first electrodes and the second electrode corresponding to the other electrodes The two leads 25 are connected to the corresponding jumper 41 through the corresponding via holes 42 disposed at the second end in the second direction, thereby achieving connection with the corresponding bonding pads.

In Fig. 12, the number of leads is the same as that of Fig. 11, but with respect to the embodiment of Fig. 11, the leads of the wiring dead zone are divided into two different directions, and the width of the wiring dead zone is further shortened. Moreover, according to the above jumper setting manner, the method of multiplexing the first lead 26 and the shared jumper can further reduce the number of leads and the bonding pads, reduce the cost, and improve the touch precision.

It should be noted that the single-layer multi-point mutual-capacitive touch screen refers to that the first electrode and the second electrode are prepared by using a single-layer electrode layer, and a multi-touch mutual-capacitive touch screen can be realized.

As can be seen from the above description, the single-layer multi-point mutual-capacitive touch screen of the embodiment of the invention reduces the number of wirings and bonding pads, reduces the width of the wiring dead zone, and improves the touch precision, and reduces the manufacturing cost.

The embodiment of the present invention further provides an electronic device. Referring to FIG. 13 , it is a schematic structural diagram of an electronic device 131 according to an embodiment of the present invention. The electronic device 131 includes a single-layer multi-point mutual capacitive touch screen 132 . Wherein, the single-layer multi-point mutual capacitive touch screen 132 can The single-layer multi-point mutual capacitive touch screen of any of the above embodiments. The electronic device 131 is, for example, a mobile phone, a tablet computer, a navigation device, or the like.

In addition, the electronic device 131 further includes an FPC (Flexible Circuit Board) and a touch wafer (not shown). The touch chip is electrically connected to the single-layer multi-point mutual-capacitive touch screen 132 through the FPC. The touch chip is used to provide a driving signal to the single-layer multi-point mutual-capacitive touch screen 132 and receive the sensing signal from the single-layer multi-point mutual-capacitive touch screen 132, thereby implementing the function of performing touch detection.

Since the electronic device 131 adopts the single-layer multi-point mutual capacitive touch screen of the above embodiment, the electronic device 131 has good touch precision and low cost. In addition, since the number of the bonding pads 23 of the present invention can be reduced, correspondingly, the width of the FPC connected to the bonding pads 23 is correspondingly reduced, so that the cost can be further reduced.

The first electrode and the first layer of the touch wafer and the single-layer multi-point mutual-capacitive touch screen of the electronic device 131 of the present invention are combined with the schematic diagram of the single-layer multi-point mutual-capacitive touch screen of the above embodiments. The connection relationship between the two electrodes is described as follows: the touch wafer includes a plurality of pins, and the plurality of pins are used to transmit signals between the touch wafer and the single-layer multi-point mutual-capacitive touch screen for each sensing electrode group. 27. Each of the first electrodes is connected to a different pin of the touch wafer. In the second direction, the second electrode of the second electrode unit 22 at the odd position is connected to the same pin of the touch wafer, and the second electrode of the second electrode unit 22 at the even position is connected to the same pin of the touch wafer, and The pins of the touch wafer connected to the second electrode located at the odd position are different from the pins of the touch wafer connected to the second electrode located at the even position.

For the different sensing electrode groups 27, in the second direction, each of the first electrode units 21 The first electrode having the same positional order is connected to the same pin of the touch wafer, and the second electrode of the second electrode unit 22 having the same positional order is connected to different pins of the touch wafer. The second electrodes belonging to different sensing electrode groups 27 are connected to different pins of the touch wafer.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but the scope of the invention is to be accorded

X‧‧‧ first direction

Y‧‧‧second direction

27‧‧‧Induction electrode set

Claims (28)

A single-layer multi-point mutual-capacitive touch screen includes: a first sensing electrode group to a mth sensing electrode group arranged along a first direction, wherein m is a positive integer greater than 1, and each sensing electrode The group includes a first electrode unit extending along a second direction and a second electrode unit extending along the second direction, the first electrode unit and the second electrode unit are oppositely disposed in the first direction, the first electrode unit The second direction is perpendicular to the first direction, and in the second direction, the first electrode unit includes a first first electrode to an nth first electrode, n is a positive integer greater than 1, and the second electrode unit includes a plurality of second electrodes; a plurality of bonding pads arranged along the first direction, the bonding pads are disposed at the first ends of the m sensing electrode groups, and the first electrodes and the second electrodes of the m sensing electrode groups respectively Corresponding bonding pads are correspondingly connected; a plurality of first leads, each of the first leads is for connecting the first electrode to a corresponding bonding pad; and a plurality of second leads, each of the second leads is for connecting the second electrode To a corresponding bonding pad; wherein the first electrode One of the second electrodes functions as a touch sensing electrode and the other serves as a touch driving electrode; wherein, in the same first electrode unit, adjacent first electrodes are partially disposed opposite each other in the first direction. The single-layer multi-point mutual capacitive touch screen of claim 1, wherein in the second direction, the second electrode unit comprises a first second electrode to a kth second electrode, where k is a positive integer greater than 1, for i the second electrode, i is a positive integer less than k, in the first direction The ith second electrode is disposed opposite to the ith first electrode portion and disposed opposite to the i+1th first electrode portion. The single-layer multi-point mutual capacitive touch screen of claim 2, wherein at least a portion of the adjacent second electrodes are oppositely disposed in the first direction. The single-layer multi-point mutual-capacitive touch screen of claim 2, wherein, in the same sensing electrode group, in the first direction: k=n-1, the kth second electrode and the nth - 1 first electrode portion is oppositely disposed and disposed opposite to the nth first electrode portion; or k = n, the entire kth second electrode is disposed opposite to a portion of the nth first electrode. The single-layer multi-point mutual capacitive touch screen of claim 1, wherein the first end is one end of the first first electrode adjacent to the m sensing electrode groups. The single-layer multi-point mutual-capacitive touch screen of claim 1, wherein any first lead does not intersect the first lead, and any second lead and the second lead do not intersect, and any first lead and any first The two leads do not cross. The single-layer multi-point mutual-capacitive touch screen of claim 1, wherein m is an even number, and in any two adjacent sensing electrode groups, the first electrode unit is disposed adjacent to the first electrode unit, Or the second electrode unit is disposed adjacent to the second electrode unit, and the adjacent sensing electrode groups are arranged in mirror symmetry. The single-layer multi-point mutual-capacitive touch screen of claim 7, wherein the two adjacent sensing electrode groups disposed adjacent to the first electrode unit and the first electrode unit are adjacent to each other The first first electrode of the first electrode unit of the sensing electrode group adopts the same first lead The wires are connected to the same bonding pad, and the other first electrodes of the first electrode units of the two adjacent sensing electrode groups are connected by a single first lead to the corresponding bonding pads, and all the two adjacent sensing electrode groups are A lead wire is connected to the corresponding bonding pad by a corresponding first electrode in a reverse direction of the second direction. The single-layer multi-point mutual capacitive touch screen of claim 7, wherein the two adjacent sensing electrode groups disposed adjacent to the second electrode unit and the second electrode unit are adjacent to each other The other second electrodes of the second electrode unit of the sensing electrode group are connected to the corresponding bonding pads by a separate second lead, and all the second leads of the two adjacent sensing electrode groups are separated by the corresponding second electrode. The opposite direction of the second direction is connected to the corresponding bond pad. The single-layer multi-point mutual-capacitive touch screen of claim 7, wherein two first sensing electrodes are disposed adjacent to the first electrode unit and the first electrode unit: two first electrodes The first electrode of the unit is divided into the first portion and the second portion in the second direction, and in the second direction, the last first electrode of the two first portions is connected to the corresponding bonding pad by the same first lead, two The other first electrodes of the first portion are connected to the corresponding bonding pads by a single first lead, and the first leads corresponding to the first electrodes of the first portion are connected by the corresponding first electrodes in the opposite direction of the second direction. And corresponding to the bonding pad; and in the second direction, the first first electrodes of the two second portions are connected to the corresponding bonding pads by the same first lead, and the other first electrodes of the two second portions are respectively used a lead is connected to the corresponding bonding pad, and the first lead corresponding to the first electrode of the second portion is connected by the corresponding first electrode in the second direction to the second end disposed at the m sensing electrode groups The hole is connected to the corresponding bonding pad through a jumper connected to the via hole, and the second end is disposed opposite to the first end, and each jumper is connected to a different bonding pad. The single-layer multi-point mutual-capacitive touch screen of claim 10, wherein the first leads corresponding to the first electrodes of the two first portions are connected to corresponding vias disposed at the first end, and are transparent A jumper connected to the via is connected to the corresponding bond pad. The single-layer multi-point mutual-capacitive touch screen of claim 11, wherein in the two adjacent sensing electrode groups, for the first electrode connected to the corresponding bonding pad through the jumper and the via, In the second direction, the first leads of the two first electrodes having the same positional order are connected to the corresponding bonding pads through the same jumper, and the jumpers are electrically connected to the corresponding leads through the vias. The single-layer multi-point mutual capacitive touch screen of any one of claims 7 to 12, wherein two adjacent sensing electrodes disposed adjacent to the second electrode unit and the other second electrode unit In the group: the second electrodes of the two second electrode units are divided into the first portion and the second portion in the second direction, and the other second electrodes of the two first portions are connected to the corresponding joint by using the separate second leads The second lead corresponding to the second electrode of the first portion is connected to the corresponding bonding pad by the corresponding second electrode in the opposite direction of the second direction; and the other second electrodes of the two second portions are separately used The second lead is connected to the corresponding bonding pad, and the second lead corresponding to the second electrode of the second portion is connected by the corresponding second electrode in the second direction to the second end disposed at the m sensing electrode groups. The hole is connected to the corresponding bonding pad through a jumper connected to the via hole, and the second end is disposed opposite to the first end, and each jumper is connected with a different bonding pad. The single-layer multi-point mutual-capacitive touch screen of claim 13, wherein the second leads corresponding to the second electrodes of the two first portions are connected to corresponding vias disposed at the first end, and are transparent A jumper connected to the via is connected to the corresponding bond pad. The single-layer multi-point mutual-capacitive touch screen of claim 14, wherein, in the two adjacent sensing electrode groups, for the second electrode connected to the corresponding bonding pad through the jumper and the via, The odd second electrode is connected to the same jumper, and the even second electrode is connected to the same jumper. The single-layer multi-point mutual capacitive touch screen of claim 7, wherein one of the first electrode unit and the second electrode unit is defined as a first type of electrode unit, and the other is a second type of electrode The unit, wherein the leads of the electrodes of all the first type of electrode units are connected to the corresponding bonding pads in the opposite direction of the second direction, and the leads of the electrodes of all the second type of electrode units are connected to the second direction to a via hole disposed at the second end of the m sensing electrode groups, and connected to the corresponding bonding pad through a jumper connected to the via hole, the second end is opposite to the first end, and each jumper connection is different Mating pad. The single-layer multi-point mutual-capacitive touch screen of claim 16, wherein the lead of each electrode of the first type of electrode unit is connected to a via disposed at the first end, and is transparent to the via The jumper of the connection is connected to the corresponding bonding pad. The single-layer multi-point mutual capacitive touch screen of any one of claims 1 to 12, wherein the first electrode comprises a first comb-shaped electrode and a second portion disposed opposite each other in the first direction a comb-shaped electrode, the first comb-shaped electrode and the second comb-shaped electrode each comprise a plurality of first branch electrodes, the first branch electrode of the first comb-shaped electrode is along the first direction, and the second comb-shaped electrode is The first branch electrode is opposite to the first direction, the first comb electrode and the second comb The electrode is electrically connected, wherein a portion of the first comb-shaped electrode and the second comb-shaped electrode is opposite to a portion of the first comb-shaped electrode and the second comb-shaped electrode in the second direction One branch electrode corresponds one by one. The single-layer multi-point mutual-capacitive touch screen of claim 18, wherein in the same first electrode unit, the first comb-shaped electrode and the second comb-shaped electrode of the first first electrode are The length of the second direction is different, the lengths of the first comb-shaped electrode and the second comb-shaped electrode of the n-th first electrode are different in the second direction, and the first comb-shaped electrode and the second comb of the other first electrodes The tooth electrodes have the same length in the second direction. The single-layer multi-point mutual capacitive touch screen of claim 19, wherein the second electrode comprises a plurality of second branch electrodes, and the second branch electrodes are disposed on the first comb electrode and the second comb Between the tooth electrodes, the second branch electrode includes a first branch unit extending in a reverse direction along the first direction and a second branch unit extending along the first direction, the first branch unit bit being corresponding to the first comb Between the two first branch electrodes of the tooth electrode, coupled with the corresponding two first branch electrodes, the second branch unit bit is between the two first branch electrodes of the corresponding second comb-shaped electrode, corresponding to The two first branch electrodes are coupled. The single-layer multi-point mutual capacitive touch screen of claim 19, wherein, for the first first electrode, the first first branch electrode of the first comb-shaped electrode is in the second direction The first first branch electrode of the second comb electrode is electrically connected. The single-layer multi-point mutual-capacitive touch screen of claim 21, wherein, for the nth first electrode, the last first branch electrode of the first comb-shaped electrode is in the second direction The last first branch electrode of the second comb electrode is electrically connected, for the pth An electrode, wherein a first branch electrode of the first comb-shaped electrode is electrically connected to a first branch electrode of the second comb-shaped electrode, and the two first branch electrodes electrically connected are oppositely disposed in the first direction, p is A positive integer greater than 1 and less than n. The single-layer multi-point mutual capacitive touch screen of claim 21, wherein for the qth first electrode, one of the first branch electrodes of the first comb electrode and the second comb electrode thereof A branch electrode is electrically connected, and the two first branch electrodes electrically connected are dislocated in the first direction, and q is a positive integer greater than 1 and not greater than n. The single-layer multi-point mutual-capacitive touch screen of claim 1, wherein each of the sensing electrode groups has the same structure, and each of the sensing electrode groups is arranged in an array. An electronic device comprising the single-layer multi-point mutual capacitive touch screen of any one of claims 1 to 12, 14 to 17, and 19 to 24, further comprising a flexible circuit board and a touch The control chip is electrically connected to the single-layer multi-point mutual-capacitive touch screen through the flexible circuit board, wherein the flexible circuit board is connected to the bonding pads. The electronic device of claim 25, wherein the electronic device comprises a touch chip, the touch chip comprises a plurality of pins, and the signals are transmitted through the pins and the sensing electrode groups for each sensing In the electrode group, each of the first electrodes is connected to a different pin of the touch chip, and in the second direction, the second electrode of the second electrode unit located at an odd position is connected to the same pin of the touch chip, and the second electrode unit is The second electrode located in the even position is connected to the same pin of the touch chip, and the pin of the touch chip connected to the second electrode at the odd position is different from the pin of the touch chip connected to the second electrode at the even position . The electronic device of claim 26, wherein, for the different sensing electrode groups, the first electrode of the first electrode unit having the same position order in the second direction is connected to the same pin of the touch wafer, A second electrode having the same positional order in the second electrode unit is connected to a different pin of the touch wafer. The electronic device of claim 26, wherein the second electrode belonging to the different sensing electrode group is connected to a different pin of the touch wafer.