TWI550485B - Single layer multipoint capacitive touch panel - Google Patents

Description

Single-layer multi-point capacitive touch screen

The present invention relates to the field of touch screen technologies, and in particular, to a single layer multi-point capacitive touch screen.

The touch screen is a touch sensing input device which is widely used nowadays. According to the touch sensing principle, the touch screen of the prior art includes a resistive touch screen, a capacitive touch screen, and a surface infrared touch screen. Wait. Among them, the resistive touch screen is widely used because of its low cost, easy implementation, and simple control. In recent years, the capacitive touch screen has high transmittance, wear resistance, environmental temperature resistance, and life. The long, high-level complex features that enable multi-touch are popular with the public.

Among them, the mutual-capacitive touch screen is an emerging technology in the capacitive touch screen. It has a good suppression of noise and ground-to-ground parasitic capacitance, and can realize true multi-touch, so it has become The main direction of capacitive touch screen chip manufacturers. Since the first electrode and the second electrode forming the coupling capacitor node in the mutual capacitance touch screen are located on the same layer, and the mutual capacitance touch screen can realize true multi-touch, the mutual capacitance touch screen is also called a single Multi-layer capacitive touch screen.

1 is a schematic diagram of electrode distribution and lead-out of a single-layer multi-point capacitive touch screen in the prior art. Referring to FIG. 1, a single-layer multi-point capacitive touch screen of the prior art includes: a plurality of electrode units 10 arranged side by side; Each of the electrode units 10 includes a plurality of first electrodes 11 arranged in a column direction, strip-shaped second electrodes 12 opposed to the plurality of first electrodes and extending in the column direction, that is, one second electrode 12 corresponds to the plurality of first electrodes 11; each of the first electrodes 11 and the opposite second electrode form a coupling capacitor node, and one coupling capacitor node corresponds to a touch point.

In order to electrically connect the first electrode 11 and the second electrode 12 to the flexible circuit (FPC) board, it is necessary to electrically connect the first electrode 11 and the second electrode 12 to the FPC board by using lead wires (not shown). In the prior art, the lead wires are electrically connected to the pads on the FPC board by bonding. In the wire-punching process, the requirements of the process and the material of the welding are very high, so as to avoid the problem of short-circuiting of adjacent lead wires.

However, in the existing single-layer multi-point capacitive touch screen, each of the first electrodes 11 needs a lead wire to be connected to the FPC board. Since the number of the first electrodes 11 is very large, the whole touch screen is taken out. There are a lot of lead wires, and the number of corresponding pads is also very large (one lead wire corresponds to one pad). Although the wire bonding process and the materials used in the wire bonding process have been strictly controlled, since all the lead wires lead out the touch screen in the same direction, the number of lead wires is very large, and the number of corresponding pads is large, resulting in adjacent pads. The distance between them is very small. In the wire-punching process, the problem of short-circuiting of adjacent lead wires still occurs, resulting in low production yield of the touch screen.

The problem solved by the present invention is to provide a new single-layer multi-point capacitive touch screen, which can reduce the number of lead wires and improve the production yield of the touch screen.

In order to solve the above problems, the present invention provides a single-layer multi-point capacitive touch screen comprising a plurality of electrode units arranged in parallel, each of the electrode units including a first electrode group and a second electrode group; a plurality of first electrodes arranged in a row, the second electrode group comprising a plurality of second electrodes arranged in a row; the first electrode group being adjacent to the second electrode group and juxtaposed, the first a first electrode of the electrode group is adjacent to and correspondingly disposed with a corresponding second electrode of the second electrode group, and the first electrode and the corresponding second electrode form a coupling capacitance node;

Wherein at least one of the electrode units is:

Each of the at least a portion of the first electrodes corresponds to the at least two second electrodes;

The first electrode in the first electrode group includes: a first type first electrode and a second type first electrode; the first type first electrodes are independent of each other; and the second type of first electrodes Each of the at least one other second type of first electrode is connected, and the second type of first electrodes connected to each other are not adjacent to each other;

The second electrode in the second electrode group includes: a first type of second electrode and a second type of second electrode; the first type of second electrodes are independent of each other; and the second type of second electrode Each of the at least one other second type of second electrode is connected, and the second type of second electrodes connected to each other are not adjacent to each other;

The connected second electrode of the second type does not correspond to the same second electrode, and the second electrode of the second type that is connected to the second electrode does not correspond to the same first electrode; and the connected first electrode of the second type is connected to each other The second type of second electrodes are staggered from each other without a corresponding portion, or only one of the connected second type of first electrodes corresponds to one of the interconnected second type of second electrodes;

Optionally, the electrodes between the two first types of first electrodes connected to each other are: a first type of first electrode; or, a second type of first electrode; or, comprising a first type of first electrode and a second type First electrode.

Optionally, the electrodes between the two second electrodes of the second type are: a second electrode of the first type; or a second electrode of the second type; or, the second electrode of the first type and the second type Second electrode.

Optionally, one of the at least one electrode unit is an electrode unit located on the outer side.

Optionally, in the at least one electrode unit:

The first electrode located at one edge of the electrode unit corresponds to only one second electrode, and the remaining first electrodes respectively correspond to two second electrodes; the second electrode located at the opposite side edge of the electrode unit corresponds to only one first electrode, and the rest The second electrodes correspond to the two first electrodes, respectively.

Optionally, in the at least one electrode unit:

At least two first electrodes respectively correspond to one second electrode, and the remaining first electrodes respectively correspond to two second electrodes;

The at least two second electrodes respectively correspond to only one first electrode, and the remaining second electrodes respectively correspond to the two first electrodes;

a first electrode corresponding to one second electrode is paired with a second electrode corresponding to one first electrode; wherein one pair is respectively located at opposite side edges of the electrode unit; the other pair is located between opposite side edges of the electrode unit, and The first electrode and the second electrode in each pair are located in adjacent rows.

Optionally, in at least one of the electrode units:

The arrangement of each of the first electrodes in the first electrode group is an inversion of the arrangement of the second electrodes in the second electrode group.

Optionally, the plurality of electrode units have the same structure.

Optionally, each of the first electrodes of the first type of electrodes is separately connected with one lead line;

The second type of first electrodes connected together share one lead line;

Each of the second electrodes of the first type of electrodes is separately connected to one lead line;

The second type of second electrodes connected together share a single lead wire.

Optionally, the lead wire leads the touch screen in the column direction or leads the touch screen in the row direction.

Optionally, the lead wires lead to the touch screen in the column direction, and each of the electrode units has a lead line connected to the first electrode and a lead line connected to the second electrode respectively located at two sides of the electrode unit.

Optionally, the lead wires connected to the first electrodes are led out in the same column direction; or the lead wires of the first electrodes are led out in one direction of the column direction, and the rest The lead wire connected to the first electrode leads to the touch screen in the other direction of the column direction;

The lead wires connected to the second electrodes are all led out in the same column direction; or the lead wires of the second electrodes are led out in one direction of the column direction to connect the touch screen to the remaining second electrodes. The lead wire leads to the touch screen in the other direction of the column direction.

Optionally, the part of the first electrodes are located on the same side of the remaining first electrodes; and the part of the second electrodes are located on the same side of the remaining second electrodes.

Optionally, in the at least one electrode unit, the number of the lead wires connected to the first electrode and the number of the lead wires connected to the second electrode are equal or different.

Optionally, in the at least one electrode unit, a predetermined reference voltage lead-out line drawn in the column direction is disposed between the first electrode group and the second electrode group.

Optionally, at least adjacent lead electrodes are provided with lead wires extending in a column direction and having a predetermined reference voltage.

Optionally, in all the electrode units, the first electrodes are located on the same side of the second electrode; or

Among all the electrode units, the first electrode of one of the adjacent two electrode units is located at one side of the second electrode, and the other electrode of the other electrode unit is located at the other side of the second electrode.

Compared with the prior art, the technical solution of the present invention has the following advantages:

In the at least one electrode unit: each of the first electrodes corresponds to at least two second electrodes, and the first electrode and the second electrode are divided into two categories: the first type of the first electrodes are independent of each other Connecting, each of the second type of first electrodes is connected to at least one other second type of first electrode, and the second type of first electrodes connected to each other are not adjacent; the first type of second electrodes are independent of each other Each of the second electrodes of the second type is connected to at least one other second electrode of the second type, and the second electrodes of the second type connected to each other are not adjacent to each other; in addition, each of the first electrode and the second electrode The distribution is such that the coupling capacitance node between each of the first electrode and the second electrode is unique. Therefore, compared with the existing single-layer multi-point capacitive touch screen, the number of electrodes in such electrode units is reduced, and accordingly, the number of lead lines drawn from the electrode unit can be reduced, and thus, such a type can be solved. The problem that the electrode unit is short-circuited by adjacent lead wires appearing in the wire bonding process improves the yield of the touch screen.

Moreover, since the first electrode and the second electrode in the electrode unit are divided into two types: the first type first electrode, the second type first electrode, the first type second electrode, and the second type described above. a second electrode; therefore, when such an electrode unit is routed, the lead lines may be distributed on both sides of the corresponding electrode unit to avoid an area between the electrode unit and the adjacent electrode unit having no lead line, and This area sets the floating block and causes problems such as the linearity and accuracy of the touch screen.

In a specific embodiment, the electrode unit located outside the touch screen is one of the above-mentioned electrode units, which can prevent the touch screen from having a trace on only one side and no trace on the other side. The control screen has a left-right asymmetry and a large influence on the edge performance.

In a specific embodiment, all the electrode units are electrode units satisfying the above conditions, and the number of lead lines of all the electrode units can be reduced, and correspondingly, the adjacent lead-out of the entire touch screen in the wire bonding process can be solved. The problem of short circuit is better, and the yield of touch screen is better. Moreover, when all the electrode units are routed, the lead lines are distributed on both sides of the corresponding electrode unit, and there is no area between the adjacent electrode units having no lead lines in the entire touch screen. The problem of lowering the linearity and accuracy of the touch screen caused by the floating block in the area; at the same time, avoiding the touch screen having the trace on one side and the trace on the other side, resulting in the touch screen The problem is that the graphics are asymmetrical and have a large impact on the edge performance.

The above described objects, features, and advantages of the present invention will be more apparent from the aspects of the invention.

Before describing the embodiments of the present invention in detail, the technical terms used in the present invention will be explained.

The invention will be described in detail below with reference to the drawings and various embodiments.

First embodiment

The following electrode units are arranged side by side, and the first electrode group and the second electrode group between the electrode units are arranged side by side, and the first electrodes in the first electrode group are arranged in a row, and in the second electrode group The second electrodes are arranged in a row. The direction in which the first and second electrodes in each electrode unit are arranged in a row is defined as a first direction, and the arrangement direction between the electrode units is defined as a second direction, and the second direction is perpendicular to the first direction.

The term "corresponding" as used in the present invention means that the corresponding first electrode and second electrode have overlapping portions in the second direction.

2 is a schematic diagram of electrode distribution and lead-out lines of a single-layer multi-point capacitive touch screen according to a first embodiment of the present invention. Referring to FIG. 2, the single-layer multi-point capacitive touch screen of the first embodiment of the present invention includes:

The number of electrode units 40 arranged in parallel, the number of electrode units 40 shown in FIG. 2 serves only as an example, and the number of specific electrode units 40 needs to be set according to actual conditions.

Each of the electrode units 40 includes a first electrode group 41 and a second electrode group 42; the first electrode group 41 includes a plurality of first electrodes 43 arranged in a row, and the second electrode group 42 includes a plurality of columns arranged in a row a second electrode 44; the first electrode group 41 is adjacent to the second electrode group 42 and arranged side by side, and the first electrode 43 of the first electrode group 41 corresponds to the second electrode group 42 The second electrodes 44 are adjacent and correspondingly disposed, and the first electrode 43 and the corresponding second electrode 44 form a coupling capacitance node.

Among all the electrode units 40, the first electrode 43 located at one edge A of the electrode unit 40 corresponds to only one second electrode 44, and the remaining first electrodes 43 respectively correspond to the two second electrodes 44; the electrode unit 40 is located opposite to the other The second electrode 44 of the side edge B corresponds to only one first electrode 43, and the remaining second electrodes 44 correspond to the two first electrodes 43, respectively.

In order to make the lead wires drawn from the electrode unit can be located on both sides of the electrode unit, in the first embodiment, the electrodes in the first electrode group and the electrodes in the second electrode group are divided into two types, one type is an independent electrode. One type is a non-independent electrode. Specifically:

The first electrode 43 in the first electrode group 41 includes: a first type first electrode a1 and a second type first electrode a2. The first type of first electrodes a1 are not connected to each other independently, that is, the first type of first electrodes a1 are not connected to any of the other first electrodes. Each of the second types of first electrodes a2 is connected to at least one other second type of first electrode a2, and the second type of first electrodes a2 connected to each other are not adjacent to each other. In this embodiment, since the first electrode 43 of one side edge A and the second electrode 44 of the other side edge B, the remaining first electrodes 43 respectively correspond to the two second electrodes 44, and the remaining second electrodes 44 Corresponding to the two first electrodes 43 respectively, if the second type of first electrodes a2 connected to each other are adjacent to each other, the second type of first electrodes a2 connected to each other may be corresponding to the same second electrode, so that two The coupling capacitor node is the same.

For example, in the first electrode unit 40 of the first column on the left side in FIG. 2, the first electrode 43 located in the first row opposite to the other side edge B is adjacent to and electrically connected to the first electrode 43 of the second row. Then, the first electrode 43 of the first row, the first electrode 43 of the second row, and the second capacitor 44 of the first row form the same coupling capacitance node.

The second electrode 44 of the second electrode group 42 includes: a first type of second electrode b1 and a second type of second electrode b2; the first type of second electrodes b1 are independent of each other, that is, the first type The two electrodes b1 are not connected to any of the other second electrodes 44. Each of the second type of second electrodes b2 is connected to at least one other second type of second electrode b2, and the second type of second electrodes b2 connected to each other are not adjacent to each other. The reason why the interconnected second-type second electrodes b2 are not adjacent is the same as the reason why the interconnected second-type first electrodes a2 are not adjacent.

In the first embodiment shown in FIG. 2, the respective electrode units 40 have the same structure. The first electrode group 41 of each of the electrode units 40 has eleven first electrodes 43, and the second electrode group 42 has eleven second electrodes 44.

In the first electrode group 41, the partially-arranged first electrode 43 is a first-type first electrode a1, and the partially-arranged first electrode 43 is a second-type first electrode a2, and the first type is continuously arranged. An electrode a1 and a continuously arranged second type of first electrode a2 alternately appear. Specifically, in the embodiment shown in FIG. 2, the three consecutively arranged first electrodes 43 in the middle portion are the first type first electrodes a1, and the three first type first electrodes a1 are respectively arranged in four consecutive rows. a second type of first electrode a2; in the four second type first electrodes a2 on both sides, the two first electrodes arranged in a spaced relationship are electrically connected together, that is, two second type first electrodes connected to each other The electrode between a2 is: a second type of first electrode a2.

In the second electrode group 42, the partially-arranged second electrode 44 is the first-type second electrode b1, the partially-arranged second electrode 44 is the second-type second electrode b2, and the first-type second electrode is continuously arranged. B1 and the continuously arranged second type second electrode b2 alternately appear. Specifically, in the embodiment shown in FIG. 2, two consecutively arranged second electrodes 44 on one side edge A side and three consecutively arranged second electrodes 44 on the other side edge B side are first The second electrode b1, the remaining six consecutively arranged second electrodes 44 are the second type of second electrodes b2; of the six second type of second electrodes b2, three of which are spaced apart from each other, the other three The electrodes are connected to each other at intervals, that is, the electrodes between the two second types of second electrodes b2 connected to each other are: a second type of second electrode b2.

In the first embodiment, among the electrode units, a portion of the first electrode that is continuously arranged is a first type of first electrode a1, and a portion of the first electrode 43 that is continuously arranged is a second type of first electrode a2. The first electrode of the first type and the second electrode of the second type alternately arranged alternately; the partially arranged second electrode 44 is a first type of second electrode b1, and the partially consecutive second electrode 44 is a second type of second electrode b2 The first electrode of the first type arranged in series and the second electrode of the second type continuously arranged alternately. In the present invention, it is not limited to this case, and it may be the case that at least one electrode unit is used.

It is necessary to pay special attention to the requirements that must be met in the touch screen: the coupling capacitor node formed by each of the first electrodes and the corresponding second electrode needs to be unique. Therefore, the coupling capacitance nodes formed by the respective first electrodes of the first electrode group and the respective second electrodes of the second electrode group are required to have uniqueness.

In each of the electrode units 40, the first type of first electrode a1 is a separate first electrode, and the coupling capacitance node formed by the corresponding second electrode 44 is unique. The second type of first electrodes a2 connected to each other do not correspond to the same second electrode 44, and the second type of first electrodes a2 connected to each other have only one second type of second electrode connected to each other. One of the b2 opposite sides forms a coupling capacitance node, and therefore, the coupling capacitance nodes formed by the second type first electrode a2 and the corresponding second electrode 44 which are connected to each other are also unique. The second type of second electrode b2 connected to each other does not correspond to the same first electrode 43, and the second type of second electrode b2 connected to each other has only one second type of first electrode connected to each other One of a2 opposes to form a coupling capacitor node, and therefore, the coupling capacitor nodes formed by the second type of second electrode b2 and the corresponding first electrode 43 which are connected to each other are also unique.

In the first embodiment, each of the first electrodes of the first type of first electrodes a1 is separately connected with one lead line; the second type of first electrodes a2 connected together share one lead line; Each of the second electrodes of the electrodes b1 is separately connected with one lead wire; the second electrode b2 of the second type connected together shares one lead wire. The lead wires lead to the touch screen in the column direction. In each of the electrode units 40, the lead wires connected to the first electrode 43 and the lead wires connected to the second electrode 44 are respectively located on both sides of the electrode unit 40. The lead wires connected to the first electrodes 43 are led out in the same column direction, and the lead wires connected to the second electrodes 44 are led out in the same column direction.

The single-layer multi-point capacitive touch screen of the first embodiment can reduce the number of lead wires drawn from each electrode unit relative to the single-layer multi-point capacitive touch screen of the prior art, and thus, each electrode can be solved. The short-circuit problem of adjacent lead wires appearing in the wire bonding process improves the production yield of the touch screen.

For example, in the first embodiment shown in FIG. 2, the number of first electrodes in each of the electrode units 40 is 11, and the number of second electrodes is 11, and the number of coupling capacitor nodes that can be provided is 21. In the prior art single-layer multi-point capacitive touch screen, if the number of coupling capacitor nodes to be provided is 21, the number of first electrodes required is 21, and one second electrode, and the number of corresponding lead lines is 22. However, in the first embodiment, since the interconnected second type first electrodes a2 share one lead line and the interconnected second type second electrodes b2 share one lead line, the single layer is compared with the prior art. The multi-point capacitive touch screen can reduce the number of lead wires drawn from each electrode unit 40, reduce the short circuit problem caused by the distance between adjacent lead wires, and improve the production yield of the touch screen.

Moreover, in this embodiment, the first electrode group has the first type first electrode and the second type first electrode, and the second electrode group has the first type second electrode and the second type second electrode, and thus, The lead wires drawn from each electrode unit can be distributed on both sides of the electrode unit, and the distance between the adjacent lead wires can be increased on the side of the electrode unit with respect to the lead wires, and the adjacent lead wires can be better avoided. Short-circuit problems caused by the distance between the lines are too close, which improves the production yield of the touch screen.

In addition, since the lead wires drawn from each electrode unit can be distributed and distributed on both sides of the electrode unit, there is no region between adjacent electrode units having no lead wires in the entire touch screen. The area is provided with a floating block, which causes the linearity and accuracy of the touch screen to be degraded. At the same time, it is possible to avoid routing along the touch screen side and no trace on the other side, resulting in no graphics left or right. Symmetry, a problem that has a large impact on edge performance.

In the first embodiment, the number of lead wires taken out from the first electrode group 41 is: 7. The number of lead wires taken out from the second electrode group 42 is: 7. That is, in the first embodiment, in each of the electrode units, the number of the lead wires connected to the first electrode and the number of the lead wires connected to the second electrode are equal. In this way, the pattern of the electrodes and the patterns of the lead wires in the touch screen are symmetrically distributed, and there is basically no area between the adjacent two electrode units without the traces, so that the graphics on the touch screen can be better. Symmetrical, improving the edge performance of the touch screen.

In the first embodiment, among the two adjacent electrode units 40, the first electrode 43 of one of the electrode units 40 is located at one side of the second electrode 44, and the first electrode 43 of the other electrode unit 40 is located at the second electrode. The other side of 44. For example, in the leftmost two electrode units 40 in FIG. 2, the first electrode 43 of the left electrode unit 40 is located on the left side of the second electrode 44, and the first electrode 43 of the right electrode unit 40 is located on the right side of the second electrode 44. Therefore, the first electrode and the second electrode of the entire touch screen are arranged in mirror symmetry.

In the first embodiment, the structures of the respective electrode units are the same, and the first electrode and the second electrode are arranged in mirror symmetry. Therefore, the end portion in the opposite direction of the lead-out direction, the adjacent and opposite first electrode 43, Adjacent and opposing second electrodes 44 may share a single lead. In the embodiment shown in FIG. 2, the lead wires lead out the touch screen in a direction from the one edge A to the other side edge B, and correspondingly, the first electrode 43 adjacent to the one edge A and opposite to each other. The adjacent and opposite second electrodes 44 share one lead line. In this way, not only can the number of lead wires be reduced, but also the wires of the lead wires can be easily drawn. For example, in the two leftmost electrode units 40 in FIG. 2, the second electrode 44 adjacent to one side edge A and the opposite one share a lead line; the middle two electrode units 40 are located at one side edge A phase. The adjacent and opposite first electrodes 43 share one lead line.

In the first embodiment, since the second type of first electrode a2 and the second type of second electrode b2 need to be connected by a connecting line, these connecting lines form a "redundant" capacitance, and therefore, in each of the electrode units 40, A lead line Sref having a predetermined reference voltage drawn in the column direction is provided between the first electrode group and the second electrode group to eliminate a "redundant" capacitance formed by the connection line. In addition, since the capacitance is also generated between the connecting lines and the respective leads, and the distance between each of the connecting lines and the respective leads is not equal, the capacitance generated by each of the connecting lines and the respective leads is not equal, which causes each touch. The capacitance of the dots is not uniform, and a predetermined reference voltage lead line Sref (not shown) may be disposed between the first electrode group and the second electrode group, and the capacitance unevenness caused by the above-described distance unequal may be balanced. The lead line Sref may be grounded, and the corresponding predetermined reference voltage is zero; the predetermined reference voltage of the lead line Sref may also be a certain level signal.

In the present invention, it is not limited to providing a lead line Sref having a predetermined reference voltage drawn in the column direction between the first electrode group 41 and the second electrode group 42 of each electrode unit 40, which may be at least one electrode unit A lead line Sref having a predetermined reference voltage drawn in the column direction is disposed between the one electrode group and the second electrode group.

Second embodiment

3 is a schematic diagram of electrode distribution and lead lines of a single-layer multi-point capacitive touch screen according to a second embodiment of the present invention. Referring to FIG. 3, the second embodiment is different from the first embodiment in that:

The number of the electrode units 50; the number of the first electrodes 53 and the second electrodes 54 in each of the electrode units 50 is different from that of the first embodiment, respectively.

In each electrode unit 50, the correspondence between the first electrode 53 and the second electrode 54 is different:

In each of the electrode units 50, the two first electrodes 53 respectively correspond to only one second electrode 54, and the remaining first electrodes 53 respectively correspond to the two second electrodes 54; the two second electrodes 54 respectively correspond to only one first electrode 53 The remaining second electrodes 54 respectively correspond to the two first electrodes 53; the first electrodes 53 corresponding to one second electrode 54 and the second electrodes 54 corresponding to one first electrode 53 appear in pairs; wherein a pair of first electrodes 53, The second electrodes 54 are respectively located at opposite side edges of the electrode unit 50; the other pairs of the first electrodes 53 and the second electrodes 54 are located between opposite side edges of the electrode unit 50, that is, between one side edge A and the other side edge B. And the first electrode and the second electrode of each pair are located in adjacent rows.

For example, in the second embodiment shown in FIG. 3, the two first electrodes 53 corresponding to one second electrode 54 are: a first electrode 53 located at one side edge A, that is, the twelfth row, and located at the sixth row. The first electrode 53; the two second electrodes 54 corresponding to one first electrode 53 are: a second electrode 54 located in the first row opposite to the other side edge B, and a second electrode 54 in the seventh row.

In each electrode unit 50, the distribution of each of the first type of first electrodes a1, the distribution of each of the second type of first electrodes a2, the distribution of each of the first type of second electrodes b1, and the distribution of each of the second type of second electrodes b2 Different from the first embodiment: the arrangement of the respective second electrodes in the second electrode group 52 is an inversion of the arrangement of the respective first electrodes in the first electrode group 51. Specifically:

In the first electrode group 51, the first electrode 53 located in the first row and the third row is the second type first electrode a2, and the first electrode a1 is a first type; the eighth row and the tenth are located The first electrode 53 of the row is a second type of first electrode a2 with a first type of first electrode a1 therebetween; the remaining first electrode 53 is a first type of first electrode a1.

In the second electrode group 52, the second electrode 54 located in the third row and the fifth row is the second electrode b2 of the second type, with a first type of second electrode b1 therebetween; located in the tenth row and the twelfth The second electrode of the row is a second type of second electrode b2 with a first type of second electrode b1 therebetween; the remaining second electrode 54 is a first type of second electrode b1.

In the second embodiment, the first electrodes of the first type are connected to each other, and the number is 1; the second electrodes of the second type connected to each other are the second electrodes of the first type. And the number is 1. However, in the present invention, the number of the first type of first electrodes between the two first type first electrodes connected to each other is not limited, and the first type of second electrodes between the two second type of second electrodes connected to each other are not limited. The number is not limited and can be determined according to actual needs.

In the second embodiment, the lead lines of each of the electrode units 50 respectively lead to the touch screen in two opposite directions in the column direction. The touch screen of the portion of the first electrode 53 leads to the touch screen in one direction of the column direction, and the lead line connected to the remaining first electrode 53 leads the touch screen in the other direction of the column direction; and the second electrode The lead wire of 54 leads the touch screen in one direction of the column direction, and the lead line connected to the remaining second electrode 54 leads the touch screen in the other direction of the column direction. The partial first electrodes are all located on the same side of the remaining first electrodes, that is, the first electrodes connected to the lead wires extending in the same direction are continuously arranged; the partial second electrodes are all located at the remaining second electrodes The same side, that is, the second electrodes connected to the lead wires extending in the same direction are continuously arranged. Specifically:

The first and second rows of lead wires of the first to sixth rows of each of the electrode units 50 lead out the touch screen in one of the column directions, and the first and second electrodes of the seventh to twelve rows are led out. The line leads the touch screen in the other direction along the column direction.

In the second embodiment, the number of the first electrodes connected to the lead wires extending in one direction and the number of the first electrodes connected to the lead wires extending in the other direction are equal, and extend in the same direction The first electrodes connected by the lead wires are continuously distributed; the number of the second electrodes connected to the lead wires extending in one direction is equal to the number of the second electrodes connected to the lead wires extending in the other direction, and The second electrodes connected by the lead wires extending in the same direction are continuously distributed.

In the present invention, when the lead wires of one electrode unit are taken out in two directions in the column direction, the number of first electrodes connected to the lead wires extending in one direction and the first wires connected to the lead wires extending in the other direction are first. The number of electrodes may not be equal, and the first electrodes connected to the lead wires extending in the same direction may also be discontinuously distributed; the number of second electrodes connected to the lead wires extending in one direction, and the other along the other The number of the second electrodes connected by the lead wires extending in the direction may not be equal, and the second electrodes connected to the lead wires extending in the same direction may also be discontinuously distributed.

In the second embodiment, among the first electrodes connected to the lead wires extending in the same direction, the first electrodes that are adjacent and opposite and farthest from the end of the touch screen share a lead line; and extend in the same direction Among the second electrodes connected by the lead wires, a second electrode adjacent and opposite to the farthest end of the touch screen screen shares a lead wire. For example, in the leftmost two electrode units 40 in FIG. 5, the sixth row is adjacent and the opposite second electrodes 44 share one lead line, and the seventh row is adjacent and the opposite second electrodes 44 share one lead line. .

In the second embodiment, the number of lead wires drawn from the both sides of each electrode unit in the column direction is also equal.

The second embodiment has the same advantages as the first embodiment and will not be described herein.

Third embodiment

4 is a schematic diagram of electrode distribution and lead-out lines of a single-layer multi-point capacitive touch screen according to a third embodiment of the present invention. Referring to FIG. 4, the third embodiment is different from the first embodiment in that:

The number of electrode units 60.

In each electrode unit 60, the distribution of each of the first type of first electrodes a1, the distribution of each of the second type of first electrodes a2, the distribution of each of the first type of second electrodes b1, and the distribution of each of the second type of second electrodes b2 Different from the first embodiment:

In the first electrode group 61, the first electrode 63 located in the first row and the third row is the second electrode of the second type a2, and the first electrode a1 is a first type; the remaining first electrode 63 is The first type of first electrode a1.

In the second electrode group 62, the second electrode 64 located in the third row and the fifth row is the second electrode b2 of the second type, with a first type of second electrode b1 therebetween; the remaining second electrode 64 is A type of second electrode b1.

In the third embodiment, the first type of first electrodes a1 are connected to each other, and the number is 1; and the second type of second electrodes b2 connected to each other is the first type. The second electrode b1 is in number one. However, in the present invention, the number of the first type of first electrodes between the two first type first electrodes connected to each other is not limited, and the first type of second electrodes between the two second type of second electrodes connected to each other are not limited. The number is not limited and can be determined according to actual needs.

In the third embodiment, in the third embodiment, the lead lines of each of the electrode units 60 respectively lead to the touch screen in two opposite directions in the column direction; and the first electrodes connected to the lead lines extending in the same direction The first electrode adjacent to and opposite to the farthest end of the touch screen screen shares a lead line; and the second electrode connected to the lead line extending in the same direction is adjacent and opposite to the touch screen The second electrode furthest from the end shares a lead wire.

Different from the second embodiment, according to the difference in the number of electrodes in each electrode unit, the first and second rows of the first to sixth rows of each electrode unit 60 are in one of the directions of the column directions. The touch screen is led out, and the lead wires of the first and second electrodes of the seventh to eleventh rows lead out the touch screen in the other direction of the column direction.

In the third embodiment, the number of lead lines taken out from the columns on both sides of each electrode unit is also equal.

The third embodiment has the same advantages as the first embodiment and will not be described herein.

Fourth embodiment.

FIG. 5 is a schematic diagram of electrode distribution and lead-out lines of a single-layer multi-point capacitive touch screen according to a fourth embodiment of the present invention. Referring to FIG. 5, the fourth embodiment is different from the first embodiment in that:

The number of electrode units 70, the number of first electrodes 73 and second electrodes 74 in each of the electrode units 70.

In the entire touch screen, the first electrode 73 and the second electrode 74 are arranged in an array. Specifically, among all the electrode units, the first electrodes 73 are located on the same side of the second electrode 74. In the fourth embodiment shown in FIG. 7, in each of the electrode units 70, the first electrodes 73 are located on the left side of the corresponding second electrode 74.

In each electrode unit 70, the distribution of each first type first electrode a1, the distribution of each second type first electrode a2, the distribution of each first type second electrode b1, and the distribution of each second type second electrode b2 Different from the first embodiment:

In the first electrode group 71, the first electrodes 73 located in the third to sixth rows are the second type first electrodes a2, wherein the first electrodes 73 of the third row and the fifth row are connected together, the fourth row and the sixth The first electrodes 73 of the row are connected together, so that a second type of first electrode a2 is connected between the two second type first electrodes a2 connected together; the remaining first electrodes 73 are first type first electrodes a1 .

In the second electrode group 72, the second electrodes 74 located in the first to fourth rows are the second electrode b2 of the second type, wherein the second electrodes 74 of the first row and the third row are connected together, the second row and the The four rows of second electrodes 74 are connected together, so that the second type second electrodes b2 connected together are a second type of second electrode b2; the remaining second electrodes 74 are the first type of second electrodes. B1.

In the fourth embodiment, between the adjacent two electrode units 70, a lead line Sref having a predetermined reference voltage extending in the column direction is disposed. The lead line Sref functions to isolate the lead line connected to the first electrode and the lead line connected to the second electrode. In the fourth embodiment, the number of lead lines taken out from the columns on both sides of each electrode unit is also equal.

The fourth embodiment has the same advantages as the first embodiment and will not be described herein.

In the above first, second, third, and fourth embodiments, the structure of each electrode unit is the same, but in the present invention, the structure of each electrode unit may be different.

In the above first, second, third, and fourth embodiments, only the first first electrode corresponds to one second electrode, the individual second electrodes correspond to one first electrode, and the remaining first electrodes correspond to two second electrodes. The remaining second electrodes correspond to the two first electrodes. In the present invention, it is not limited to the case exemplified in the above embodiments, as long as it is satisfied that at least a part of the first electrodes correspond to at least two second electrodes.

For example, referring to FIG. 6, in the electrode unit 80 on the left side, each of the first electrodes 83 of the first electrode group 81 corresponds to the two second electrodes 84. In the electrode unit 80 on the right side, each of the first electrodes 83 of the first electrode group 81 corresponds to a second electrode 84, some corresponding to two second electrodes, some corresponding to three second electrodes 84, and some corresponding to four Two electrodes 84.

In the present invention, in each of the electrode units, the coupling capacitor node formed by each of the first electrodes and the corresponding second electrode needs to satisfy the unique requirement. In the above first, second, third, and fourth embodiments, only one of the interconnected second type first electrodes corresponds to one of the interconnected second type of second electrodes, and is connected to each other. The second type of first electrode corresponds to a different second electrode, and the second type of second electrodes connected to each other correspond to different first electrodes, so as to meet the unique requirement of the coupling capacitor node.

In the present invention, in order to satisfy the unique requirement of the coupling capacitor node: for example, referring to FIG. 7, in the electrode unit 90, the second type first electrode a2 connected to each other in the first electrode group 91 and the second type connected to each other The two electrodes b2 are staggered from each other without a corresponding portion, and the second type of first electrodes a2 connected to each other correspond to different second electrodes 94, and the second type of second electrodes b2 connected to each other correspond to different first electrodes 93. Wherein the first electrode group 91 of the second electrode group 91 is located in the sixth to tenth rows, and the second electrode group 92 of the second electrode group 92 is located in the first row and the fourth row, and therefore, the first electrode group The second type first electrode a2 connected to each other in 91 and the second type second electrode b2 connected to each other are shifted from each other without a corresponding portion.

In the above first and fourth embodiments, a second type of first electrode is connected between the two first type first electrodes connected to each other, and a second type second is connected between the two second type of second electrodes connected to each other. electrode. In the second and third embodiments, a first type first electrode is connected between the two first type first electrodes connected to each other, and a first type second electrode is connected between the two second type second electrodes connected to each other. . In the present invention, the electrodes between the two first-type first electrodes connected to each other are not limited to the above. For example, referring to FIG. 7, the seventh row and the tenth row of the first electrode a2 connected to each other may be further connected. Between the ninth row and the twelfth row of the second type first electrode a2 having a second type of first electrode a2 and a first type of first electrode therebetween A1.

In the present invention, the electrodes between the second type of first electrodes connected to each other are not limited to the above, as long as the following conditions are satisfied: the electrodes between the two first type of first electrodes connected to each other are the first type of the first type. The electrode, or, is a second type of first electrode; or, includes a first type of first electrode and a second type of first electrode. Similarly, the electrodes between the two second electrodes of the second type are connected to the second electrode of the first type; or, the second electrode of the second type; or, the second electrode of the first type and the second type of the second type electrode.

In the above first, second, third, and fourth embodiments, the lead wires drawn from the electrode unit lead the touch screen in the column direction. In the present invention, the lead wires drawn from the electrode unit may also be in the row direction. Lead to the touch screen.

In the above first, second, third, and fourth embodiments, in each of the electrode units, the number of the lead wires drawn from the first electrode is equal to the number of the lead wires drawn from the second electrode, and is not limited in the present invention. In the case described in the first, second, third, and fourth embodiments, the number of the lead wires drawn from the first electrode may be different from the number of the lead wires drawn from the second electrode, or may be multiple . When the difference is one, the pattern of the electrodes and the pattern of the lead lines in the touch screen are also symmetrically distributed, and there is basically no area between the adjacent two electrode units without the line, so that the prior art can be better solved. problem.

In the above first, second, third, and fourth embodiments, each of the first electrode groups and the second electrode groups of the first electrode group in each of the electrode units satisfy the following conditions:

At least a portion of each of the first electrodes and at least two second electrodes;

The first electrode in the first electrode group includes: a first type of first electrode and a second type of first electrode; the first type of first electrodes are independently connected to each other; each of the second type of first electrodes Each of the at least one other second type of first electrode is connected, and the second type of first electrodes connected to each other are not adjacent to each other;

The second electrode in the second electrode group includes: a first type of second electrode and a second type of second electrode; the first type of second electrodes are independent of each other; each of the second type of second electrodes Each of the at least one other second type of second electrode is connected, and the second type of second electrodes connected to each other are not adjacent to each other;

The connected second electrode of the second type does not correspond to the same second electrode, and the second electrode of the second type that is connected to the second electrode does not correspond to the same first electrode; and the connected first electrode of the second type is connected to each other The second type of second electrodes are staggered from each other without a corresponding portion, or only one of the connected second type of first electrodes corresponds to one of the interconnected second type of second electrodes.

However, in the present invention, the above conditions are not limited to each of the electrode units, and as long as one of the electrode units satisfies the above conditions, the problems of the prior art can be solved to some extent.

For the electrode unit that satisfies the above conditions, the number of electrodes in the electrode unit can be reduced compared with the existing single-layer multi-point capacitive touch screen, and accordingly, the number of lead wires drawn from the electrode unit can be reduced, and further, The problem that the electrode unit is short-circuited by adjacent lead wires occurring in the wire bonding process can be solved, and the production rate of the touch screen is improved.

Moreover, since the first electrode and the second electrode in the electrode unit are divided into two types: the first type of first electrodes are independently connected to each other, and each of the second type of first electrodes is connected to at least one other second type. a first electrode, and the second type of first electrodes connected to each other are not adjacent; the first type of second electrodes are independently connected to each other, and each of the second type of second electrodes is connected to at least one other second type The two electrodes, and the second type of second electrodes connected to each other are not adjacent to each other; therefore, when the electrode unit is routed, the lead lines may be distributed on both sides of the electrode unit to avoid the electrode unit and adjacent An area where there is no lead line between the electrode units, and a floating block is required in the area, which causes a problem that the linearity and accuracy of the touch screen are lowered. Moreover, the lead wires are substantially distributed on one side of the electrode unit, and the lead wires are distributed on both sides of the electrode unit to further increase the distance between adjacent lead wires, thereby better avoiding the distance between the adjacent lead wires. The short-circuit problem caused by the recent increase in touch screen production yield.

The electrode unit located on the outer side of the touch screen is an electrode unit that satisfies the above conditions, so that the touch screen can be prevented from being routed on one side and the other side has no trace, resulting in a left-right asymmetry of the graphic and a large edge performance. The problem of impact.

Although the present invention has been disclosed above, the present invention is not limited thereto. Any changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be determined by the scope defined by the appended claims.

10‧‧‧Electrode unit
11‧‧‧First electrode
12‧‧‧Second electrode
40‧‧‧Electrode unit
41‧‧‧First electrode group
42‧‧‧Second electrode group
43‧‧‧First electrode
44‧‧‧second electrode
A1‧‧‧first type first electrode
A2‧‧‧Second type first electrode
B1‧‧‧First type second electrode
B2‧‧‧Second type second electrode
50‧‧‧electrode unit
51‧‧‧First electrode group
52‧‧‧Second electrode group
53‧‧‧First electrode
54‧‧‧second electrode
60‧‧‧electrode unit
61‧‧‧First electrode group
62‧‧‧Second electrode group
63‧‧‧First electrode
64‧‧‧second electrode
70‧‧‧electrode unit
71‧‧‧First electrode group
72‧‧‧Second electrode group
73‧‧‧First electrode
74‧‧‧second electrode
80‧‧‧electrode unit
81‧‧‧First electrode group
82‧‧‧Second electrode group
83‧‧‧First electrode
84‧‧‧second electrode
90‧‧‧electrode unit
91‧‧‧First electrode group
92‧‧‧Second electrode group
93‧‧‧First electrode
94‧‧‧second electrode

1 is a schematic diagram of electrode distribution and lead-out lines of a single-layer multi-point capacitive touch screen in the prior art; FIG. 2 is a schematic diagram of electrode distribution and lead-out lines of a single-layer multi-point capacitive touch screen according to a first embodiment of the present invention; 3 is a schematic diagram of electrode distribution and lead lines of a single-layer multi-point capacitive touch screen according to a second embodiment of the present invention; FIG. 4 is an electrode distribution of a single-layer multi-point capacitive touch screen according to a third embodiment of the present invention; FIG. 5 is a schematic diagram of electrode distribution and lead-out lines of a single-layer multi-point capacitive touch screen according to a fourth embodiment of the present invention; FIG. 6 is a schematic diagram of a first variation of an electrode unit according to an embodiment of the present invention; Figure 7 is a schematic view showing a second variation of the electrode unit in a specific embodiment of the present invention.

40‧‧‧Electrode unit

41‧‧‧First electrode group

42‧‧‧Second electrode group

43‧‧‧First electrode

44‧‧‧second electrode

A1‧‧‧first type first electrode

A2‧‧‧Second type first electrode

B1‧‧‧First type second electrode

B2‧‧‧Second type second electrode

Claims (17)

A single-layer multi-point capacitive touch screen comprising a plurality of electrode units arranged in parallel, each electrode unit comprising a first electrode group and a second electrode group; the first electrode group comprising a plurality of first rows arranged in a column An electrode, the second electrode group includes a plurality of second electrodes arranged in a row; the first electrode group is adjacent to the second electrode group and juxtaposed, and the first electrode in the first electrode group is Corresponding second electrodes of the second electrode group are adjacent and correspondingly disposed, and the first electrode and the corresponding second electrode form a coupling capacitance node; wherein, among the at least one electrode unit: at least part of the first electrode a first electrode corresponding to at least two second electrodes; a first electrode of the first electrode group includes: a first type first electrode and a second type first electrode; the first type first electrodes are independent of each other Non-connected; each of the second type of first electrodes is connected to at least one other second type of first electrode, and the second type of first electrodes connected to each other are not adjacent; wherein the second electrode group is The second electrode includes: a first type of second electrode and a second type of second electrode; the first type of second electrodes are independent of each other; each of the second type of second electrodes is connected to at least one other second type of second electrode And the second type of second electrodes that are connected to each other are not adjacent to each other; the second type of first electrodes that are connected to each other do not correspond to the same second electrode, and the second type of second electrodes that are connected to each other do not correspond to the same An electrode; and the connected second electrode of the second type and the second electrode of the second type connected to each other are not offset from each other, or only one of the connected first electrodes of the second type is connected to each other One of the second type of second electrodes corresponds. The single-layer multi-point capacitive touch screen of claim 1, wherein the electrodes between the two first type of first electrodes connected to each other are: a first type of first electrode; or, a second type of first electrode; Alternatively, a first type of first electrode and a second type of first electrode are included. The single-layer multi-point capacitive touch screen of claim 1, wherein the electrodes between the two second electrodes of the second type are: a second electrode of the first type; or a second electrode of the second type; Alternatively, a second electrode of the first type and a second electrode of the second type are included. The single-layer multi-point capacitive touch screen of claim 1, wherein one of the at least one electrode unit is an electrode unit located outside. The single-layer multi-point capacitive touch screen of claim 1, wherein the at least one electrode unit: the first electrode located at one edge of the electrode unit corresponds to only one second electrode, and the remaining first electrodes respectively correspond to two a second electrode; the second electrode located on the opposite side edge of the electrode unit corresponds to only one first electrode, and the remaining second electrodes respectively correspond to the two first electrodes. The single-layer multi-point capacitive touch screen of claim 1, wherein at least one of the at least one electrode unit corresponds to only one second electrode, and the remaining first electrodes respectively correspond to two second electrodes The at least two second electrodes respectively correspond to one first electrode, and the remaining second electrodes respectively correspond to the two first electrodes; the first electrode corresponding to one second electrode and the second electrode corresponding to one first electrode appear in pairs; One pair is located on opposite side edges of the electrode unit; the other pair is located between opposite side edges of the electrode unit, and the first electrode and the second electrode in each pair are located in adjacent rows. The single-layer multi-point capacitive touch screen of claim 1, wherein the at least one electrode unit is arranged in a manner that each of the first electrodes in the first electrode group is arranged in a second electrode group. Inverted. The single-layer multi-point capacitive touch screen according to any one of claims 1 to 7, wherein the plurality of electrode units have the same structure. The single-layer multi-point capacitive touch screen according to any one of claims 1 to 7, wherein each of the first electrodes of the first type of electrodes is separately connected with one lead line; One electrode shares one lead line; each of the second electrodes of the first type of second electrode is separately connected with one lead line; the second type of second electrodes connected together share one lead line. The single-layer multi-point capacitive touch screen according to claim 9, wherein the lead line leads to the touch screen in the column direction or the touch screen in the row direction. The single-layer multi-point capacitive touch screen of claim 9, wherein the lead line leads to the touch screen in the column direction, and the lead line and the second electrode connected to the first electrode in each of the electrode units The connected lead wires are respectively located on both sides of the electrode unit. The single-layer multi-point capacitive touch screen of claim 11 , wherein the lead wires connected to the first electrode are led out in the same column direction; or, the lead wires of the first electrode are along the column One of the directions leads to the touch screen, and the lead line connected to the remaining first electrodes leads the touch screen in the other direction of the column direction; the lead lines connected to the second electrode are all pulled out in the same column direction The control screen; or, the lead wire of the part of the second electrode leads the touch screen in one direction of the column direction, and the lead line connected to the other second electrode leads the touch screen in the other direction of the column direction. The single-layer multi-point capacitive touch screen of claim 12, wherein the part of the first electrodes are located on the same side of the remaining first electrodes; and the part of the second electrodes are located on the remaining second electrodes The same side. In the single-layer multi-point capacitive touch screen of claim 9, the number of the lead lines connected to the first electrode and the number of the lead lines connected to the second electrode are equal or different in at least one of the electrode units. . The single-layer multi-point capacitive touch screen of claim 9, wherein at least one of the electrode units is provided with a predetermined reference voltage lead-out line drawn in the column direction between the first electrode group and the second electrode group. The single-layer multi-point capacitive touch screen of claim 9, wherein at least two adjacent electrode units are provided with lead wires having a predetermined reference voltage extending in the column direction. The single-layer multi-point capacitive touch screen according to any one of claims 1 to 7, wherein all of the electrode units are located on the same side of the second electrode; or, among all the electrode units, adjacent The first electrode of one of the two electrode units is located on one side of the second electrode, and the other electrode of the other electrode unit is located on the other side of the second electrode.