CN113574494A

CN113574494A - Touch structure, touch panel and touch driving method

Info

Publication number: CN113574494A
Application number: CN202080000178.XA
Authority: CN
Inventors: 蒋宜辰; 张光均; 罗鸿强; 张贵玉
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2021-10-29
Anticipated expiration: 2040-02-24
Also published as: CN113574494B; WO2021168607A1

Abstract

A touch structure (10) comprises a plurality of touch electrode assemblies (11), and the plurality of touch electrode assemblies (11) are arranged in an array. At least part of the touch electrode combinations (11) in the plurality of touch electrode combinations (11) comprises a main electrode (111) and a group of N sub-electrodes (112), wherein the N sub-electrodes (112) are arranged in parallel in a first direction, the N sub-electrodes (112) are arranged in parallel with the main electrode (111) in a second direction, and the first direction and the second direction are crossed. N sub-electrodes (112) of the touch electrode assembly (11) are respectively driven by N secondary touch channels, a main electrode (111) is driven by a main touch channel, and N is an integer larger than 1. The touch structure (10) has the advantages that the number of touch channels is small, touch blind areas caused by channel wiring are reduced, narrow frames can be realized, the number of required masks is small, the problem of low grounding quality can be avoided, and large-size and folding screens can be realized.

Description

Touch structure, touch panel and touch driving method

Technical Field

The embodiment of the disclosure relates to a touch structure, a touch panel and a touch driving method.

Background

With the development of technology, touch screens are increasingly widely used. The touch screen provides a simple and convenient man-machine interaction mode by replacing a mechanical button panel with a tactile feedback system. Touch screens include capacitive, resistive, infrared, and surface acoustic wave types, according to various principles of operation. The capacitive touch screen works by utilizing the current induction phenomenon of a human body, supports multi-point touch, has the advantages of wear resistance, long service life, low power consumption and the like, is developed rapidly, and is widely applied to electronic products such as mobile phones, tablet computers, notebook computers, televisions, displays, digital photo frames, navigators and the like.

Disclosure of Invention

At least one embodiment of the present disclosure provides a touch structure, including a plurality of touch electrode assemblies, where the plurality of touch electrode assemblies are arranged in an array, at least some of the plurality of touch electrode assemblies include a main electrode and a set of N sub-electrodes, the N sub-electrodes are arranged in parallel in a first direction, the N sub-electrodes are arranged in parallel with the main electrode in a second direction, the first direction and the second direction are crossed, the N sub-electrodes of the touch electrode assembly are respectively driven by N sub-touch channels, the main electrode is driven by the main touch channel, and N is an integer greater than 1.

For example, in the touch structure provided in an embodiment of the present disclosure, the main electrodes of the touch electrode assemblies in the same row are in the same row and are driven by different main touch channels, and the multiple sets of N sub-electrodes of the touch electrode assemblies in the same row are in the same row and are respectively driven by the same N sub-touch channels.

For example, in the touch structure provided in an embodiment of the present disclosure, the plurality of secondary touch channels for driving the sub-electrodes of the touch electrode combinations in different rows are different.

For example, the touch structure provided by an embodiment of the present disclosure further includes a plurality of wires, where the plurality of wires respectively connect in series N sub-electrodes in different touch electrode combinations in the same column, so as to obtain N signal paths insulated from each other, and the N signal paths insulated from each other are electrically connected to the N secondary touch channels, respectively.

For example, in the touch structure provided in an embodiment of the present disclosure, two adjacent touch electrode combinations in the same column include a first touch electrode combination and a second touch electrode combination, N sub-electrodes of the first touch electrode combination are electrically connected to N sub-electrodes of the second touch electrode combination, and the N sub-electrodes of the first touch electrode combination and the N sub-electrodes of the second touch electrode combination are arranged in an opposite order along the first direction.

For example, in a touch structure provided in an embodiment of the present disclosure, each touch electrode combination in the at least some touch electrode combinations includes 4 sub-electrodes, where the 4 sub-electrodes include a first sub-electrode driven by a first sub-touch channel, a second sub-electrode driven by a second sub-touch channel, a third sub-electrode driven by a third sub-touch channel, and a fourth sub-electrode driven by a fourth sub-touch channel, the sub-electrodes of the first touch electrode combination are arranged along the first direction in an order of first sub-electrode-second sub-electrode-third sub-electrode-fourth sub-electrode, and the sub-electrodes of the second touch electrode combination are arranged along the first direction in an order of fourth sub-electrode-third sub-electrode-second sub-electrode-first sub-electrode.

For example, in the touch structure provided in an embodiment of the present disclosure, the plurality of wires are distributed in an S-shaped extending manner.

For example, in the touch structure provided in an embodiment of the present disclosure, the main electrodes of the touch electrode assemblies in the same row are driven by the same main touch channel.

For example, in the touch structure provided in an embodiment of the present disclosure, for the same touch electrode combination, the area of the main electrode is larger than the area of the sub-electrode.

For example, the touch structure provided by an embodiment of the present disclosure further includes a plurality of main signal lines and a plurality of secondary signal lines, the plurality of main signal lines extend along the first direction and are electrically connected to main electrodes in the plurality of touch electrode combinations respectively, the plurality of secondary signal lines extend along the first direction and are divided into a plurality of groups, the plurality of groups of secondary signal lines are electrically connected to secondary electrodes in the plurality of rows of touch electrode combinations respectively, each group of secondary signal lines includes N secondary signal lines, and N secondary signal lines in each group of secondary signal lines provide N secondary touch channels for driving the secondary electrodes of the touch electrode combinations located in the same row.

For example, in the touch structure provided in an embodiment of the present disclosure, the main signal lines electrically connected to the main electrodes in the touch electrode assemblies in the same row are electrically connected to each other.

For example, in the touch structure provided in an embodiment of the present disclosure, the shape of the main electrode and the shape of the sub-electrode are both rectangular or square.

For example, in the touch structure provided in an embodiment of the present disclosure, in the same touch electrode combination, the length of the main electrode in the first direction is greater than or equal to the length of the distribution area of the N sub-electrodes in the first direction.

For example, in the touch structure provided in an embodiment of the present disclosure, the touch structure is a self-capacitance touch structure, and the main electrode and the sub-electrode are both self-capacitance touch electrodes.

For example, in the touch structure provided in an embodiment of the present disclosure, the touch electrode assemblies are disposed on the same layer.

At least one embodiment of the present disclosure further provides a touch panel including the touch structure according to any one of the embodiments of the present disclosure.

For example, the touch panel provided by an embodiment of the present disclosure further includes a display structure, wherein the touch structure and the display structure are stacked.

At least one embodiment of the present disclosure further provides a touch driving method for a touch structure according to any embodiment of the present disclosure, including: and respectively detecting a main induction signal of the main electrode and a secondary induction signal of the secondary electrode, and determining a touch position based on the main induction signal and the secondary induction signal.

For example, in a touch driving method provided in an embodiment of the present disclosure, detecting the primary sensing signal of the primary electrode and the secondary sensing signal of the secondary electrode, respectively, and determining the touch position based on the primary sensing signal and the secondary sensing signal includes: detecting main induction signals of all main electrodes in the touch structure, and determining a touch area according to the main induction signals of the main electrodes; detecting a secondary induction signal of a secondary electrode positioned in the touch area; determining the touch position based on the primary sensing signal of the primary electrode and the secondary sensing signal of the secondary electrode.

For example, in a touch driving method provided in an embodiment of the present disclosure, detecting the primary sensing signal of the primary electrode and the secondary sensing signal of the secondary electrode, respectively, and determining the touch position based on the primary sensing signal and the secondary sensing signal includes: detecting main induction signals of all main electrodes and secondary induction signals of all secondary electrodes in the touch structure; determining the touch position based on the primary sensing signal and the secondary sensing signal.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

Fig. 1 is a schematic plan view of a touch structure;

fig. 2 is a schematic plan view of a touch structure according to some embodiments of the present disclosure;

FIG. 3 is a partial enlarged view of the touch structure shown in FIG. 2;

fig. 4 is a schematic cross-sectional view of a touch structure according to some embodiments of the present disclosure;

fig. 5 is a schematic diagram of a touch detection method of a touch structure according to some embodiments of the present disclosure;

fig. 6 is a schematic block diagram of a touch panel according to some embodiments of the present disclosure;

fig. 7 is a schematic cross-sectional view of another touch panel according to some embodiments of the present disclosure;

fig. 8 is a flowchart illustrating a touch driving method according to some embodiments of the present disclosure; and

fig. 9 is a flowchart illustrating another touch driving method according to some embodiments of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The capacitive touch screen comprises a self-capacitance touch screen and a mutual capacitance touch screen. The touch structure in the self-capacitance touch screen is usually a self-capacitance electrode, and the self-capacitance electrode and the ground form a capacitance, that is, the self-capacitance electrode itself has a capacitance to the ground. When a finger of a user touches the screen, the capacitance of the finger is superimposed on the capacitance of the self-capacitance electrode itself, so that the capacitance is increased. When touch detection is carried out, a finger of a user touches the screen, so that the capacitance of the self-capacitance electrode at the touch point is changed, and the coordinate of the touch point can be determined by detecting the change of the capacitance.

The development of the touch screen and the display screen supplement each other, and along with the development of the flexible display technology, the flexible touch screen also gradually becomes a research hotspot. Flexible touch screens typically include Flexible Single Layer On Cell (FSLOC) touch screens and Flexible multilayer On Cell (FMLOC) touch screens. The touch structure in the FSLOC touch screen is a single layer, that is, the touch structure is a single layer of self-capacitance electrodes. Therefore, compared with an FMLOC touch screen, the FSLOC touch screen needs a small number of masks in the manufacturing process, can achieve ultra-narrow frames or no frames, is small in electrode area of each channel and small in capacitance load due to the fact that the FSLOC touch screen is based on the self-capacitance principle, can avoid the problem of Low Ground quality (LGM), and is suitable for medium and large size and folding screen products.

Fig. 1 is a schematic plan view of a touch structure, which is applied to a conventional FSLOC touch screen, for example. For example, the touch structure includes a plurality of electrodes 002, and the electrodes 002 are disposed on a substrate 001. Each electrode 002 is a self-capacitance electrode and is driven by a separate touch channel. Each electrode 002 is electrically connected to a corresponding touch channel in a touch driving circuit (or a touch driving chip) provided separately through a signal line 003.

With the increase of the screen size, the number of touch channels is increased sharply. For example, for a 6.53 inch FSLOC touch screen, the number of self-capacitance electrodes and touch channels required is up to 352. Accordingly, the number of signal lines 003 also sharply increases as the screen size increases. A large number of signal lines 003 require a large wiring area, so that the interval between the adjacent electrodes 002 is large, and the area between the adjacent electrodes 002 cannot be touch-detected, that is, a touch dead zone (for example, the area indicated by the dashed line frame in fig. 1) is formed. Therefore, a large number of channel wirings (e.g., signal wire 003 wirings) cause more touch blind areas and also occupy more lower frame areas, thereby limiting the application of the FSLOC touch screen to large-sized products.

At least one embodiment of the present disclosure provides a touch structure, a touch panel and a touch driving method. The touch control structure has the advantages that the number of touch control channels is small, touch control blind areas caused by channel wiring are reduced, narrow frames are favorably realized, the number of required masks is small, the cost can be reduced, the process yield is improved, the problem of low grounding quality can be avoided, and the realization of large-size and folding screens is facilitated.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. It should be noted that the same reference numerals in different figures will be used to refer to the same elements that have been described.

At least one embodiment of the present disclosure provides a touch structure, which includes a plurality of touch electrode assemblies arranged in an array. At least part of the touch electrode combinations comprise a main electrode and a group of N sub-electrodes, the N sub-electrodes are arranged in parallel in a first direction, the N sub-electrodes and the main electrode are arranged in parallel in a second direction, and the first direction and the second direction are crossed. N sub-electrodes of the touch electrode combination are respectively driven by N secondary touch channels, a main electrode is driven by a main touch channel, and N is an integer larger than 1.

Fig. 2 is a schematic plan view of a touch structure according to some embodiments of the present disclosure. As shown in fig. 2, the touch structure 10 includes a plurality of touch electrode assemblies 11. The plurality of touch electrode assemblies 11 are disposed on the substrate 001 and arranged in an array. For example, the plurality of touch electrode assemblies 11 are arranged in multiple rows and multiple columns, a row of touch electrode assemblies 11 may be arranged along a horizontal straight line, along an oblique line, or along a broken line, and a column of touch electrode assemblies 11 may be arranged along a vertical straight line, along an oblique line, or along a broken line. When the touch structure 10 is applied to a touch panel or a touch device, the number of the touch electrode assemblies 11, the number of rows and columns of an array formed by the touch electrode assemblies 11, the arrangement manner of the touch electrode assemblies 11, and the like may be determined according to actual requirements, for example, according to the size and display requirements of the touch panel or the touch device, and are not limited to the number and arrangement manner shown in fig. 2.

For example, at least a part of the touch electrode assembly 11 includes a main electrode 111 and a set of N sub-electrodes 112, where N is an integer greater than 1. For example, in some examples, as shown in fig. 2, each touch electrode assembly 11 includes a main electrode 111 and a set of 4 sub-electrodes 112, that is, N ═ 4. Of course, the embodiments of the present disclosure are not limited thereto, and N may also be any number such as 2, 3, 5, etc., which may be determined according to actual requirements, for example, according to the requirements of precision and the number of channels.

For example, N sub-electrodes 112 are arranged in parallel in the first direction, and N sub-electrodes 112 are arranged in parallel with the main electrode 111 in the second direction. For example, the first direction and the second direction intersect. For example, in some examples, as shown in fig. 2, the first direction is a column direction and the second direction is a row direction, the first direction and the second direction being perpendicular to each other. It should be noted that, in the embodiment of the disclosure, the first direction and the second direction may be two arbitrary directions intersecting each other, and an included angle between the two directions may be smaller than 90 degrees, for example, at this time, in one touch electrode assembly 11, the N sub-electrodes 112 are obliquely arranged, and the main electrode 111 is also obliquely disposed.

For example, the N sub-electrodes 112 of the touch electrode assembly 11 are respectively driven by the N secondary touch channels, and the main electrode 111 is driven by the main touch channel. For example, the touch channels (the secondary touch channel and the primary touch channel) may be driving channels of an additionally provided touch driving circuit, and the touch driving circuit may drive the primary electrode 111 and the secondary electrode 112 through the touch channels. For example, the touch driving circuit may collect sensing signals of the main electrode 111 and the sub-electrode 112 through a touch channel, and may also output scanning signals to the main electrode 111 and the sub-electrode 112 through the touch channel, thereby implementing driving of the main electrode 111 and the sub-electrode 112.

It should be noted that, since the touch structure 10 shown in fig. 2 does not include a touch driving circuit provided separately, in order to more clearly illustrate the embodiment of the present disclosure, the touch channels provided by the touch driving circuit are labeled on the corresponding electrodes in fig. 2. For example, as shown in fig. 2, the main electrode 111 of the touch electrode assembly 11 in the first row and the first column is driven by a main touch channel M1, and the N sub-electrodes 112 are respectively driven by N secondary touch channels, which are respectively S1, S2, S3, and S4.

It should be noted that, in the embodiment of the disclosure, the touch channel for driving the main electrode 111 is referred to as a main touch channel, the touch channel for driving the sub-electrode 112 is referred to as a secondary touch channel, and the main touch channel and the secondary touch channel may be any driving channels in a touch driving circuit, and both of the main touch channel and the secondary touch channel may drive correspondingly connected electrodes, and there is no structural difference.

It should be noted that, in the embodiment of the present disclosure, a manner of driving the main electrode 111 and the sub-electrode 112 through the touch channel by the touch driving circuit is not limited, and only the sensing signals of the main electrode 111 and the sub-electrode 112 may be collected, or only the scanning signals are output to the main electrode 111 and the sub-electrode 112, or both the sensing signals of the main electrode 111 and the sub-electrode 112 and the scanning signals are output to the main electrode 111 and the sub-electrode 112, which may be determined according to actual requirements, and the embodiment of the present disclosure is not limited thereto.

For example, as shown in fig. 2, the main electrodes 111 of the touch electrode assemblies 11 in the same column are located in the same column and driven by different main touch channels. Taking the first row of touch electrode assemblies 11 as an example, the plurality of main electrodes 111 are respectively driven by the main touch channels M1, M2, M3 and M4 in sequence along the first direction, and the main touch channels M1, M2, M3 and M4 are different from each other, that is, the main touch channels M1, M2, M3 and M4 are 4 different touch channels.

For example, the plurality of sets of N sub-electrodes 112 of the touch electrode assemblies 11 in the same row are in the same row and are respectively driven by the same N sub-touch channels. Still taking the first row of touch electrode assemblies 11 as an example, the plurality of sets of N sub-electrodes 112 are respectively driven by the same N sub-touch channels S1, S2, S3, S4. That is, in the row of touch electrode assemblies 11, the 4 sub-electrodes 112 in the first row of touch electrode assemblies 11 are respectively driven by the secondary touch channels S1, S2, S3, S4, the 4 sub-electrodes 112 in the second row of touch electrode assemblies 11 are also driven by the secondary touch channels S1, S2, S3, S4, and so on. Therefore, the plurality of sets of N sub-electrodes 112 of each row of touch electrode assembly 11 share N secondary touch channels. For example, as shown in fig. 2, the sub-electrodes 112 of the first row of touch electrode assemblies 11 share 4 secondary touch channels S1, S2, S3 and S4, the sub-electrodes 112 of the second row of touch electrode assemblies 11 share 4 secondary touch channels S5, S6, S7 and S8, and so on.

For example, the plurality of secondary touch channels for driving the sub-electrodes 112 of the touch electrode assemblies 11 of different columns are different. For example, as shown in fig. 2, the secondary touch channels for driving the sub-electrodes 112 of the first row of touch electrode assemblies 11 are S1, S2, S3 and S4, the secondary touch channels for driving the sub-electrodes 112 of the second row of touch electrode assemblies 11 are S5, S6, S7 and S8, the secondary touch channels for driving the sub-electrodes 112 of the third row of touch electrode assemblies 11 are S9, S10, S11 and S12, and so on. The secondary touch channels S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11, S12, and the like are different from each other.

Fig. 3 is a partial enlarged view of the touch structure shown in fig. 2, for example, an enlarged view of the first row of touch electrode assemblies 11 in fig. 2. For example, two adjacent touch electrode assemblies 11 in the same column include a first touch electrode assembly 11a and a second touch electrode assembly 11 b. The N sub-electrodes 112 of the first touch electrode assembly 11a are electrically connected to the N sub-electrodes 112 of the second touch electrode assembly 11b, and the N sub-electrodes 112 of the first touch electrode assembly 11a and the N sub-electrodes 112 of the second touch electrode assembly 11b are arranged in an opposite order along the first direction.

Taking the first touch electrode assembly 11a and the second touch electrode assembly 11b shown in fig. 3 as an example, each touch electrode assembly 11 (any one of the first touch electrode assembly 11a and the second touch electrode assembly 11b) includes 4 sub-electrodes 112, and the 4 sub-electrodes 112 include a first sub-electrode 112a driven by the first sub-touch channel S1, a second sub-electrode 112b driven by the second sub-touch channel S2, a third sub-electrode 112c driven by the third sub-touch channel S3, and a fourth sub-electrode 112d driven by the fourth sub-touch channel S4.

For example, the sub-electrodes 112 of the first touch electrode assembly 11a are arranged along the first direction in the order of the first sub-electrode 112a, the second sub-electrode 112b, the third sub-electrode 112c, and the fourth sub-electrode 112 of the second touch electrode assembly 11b are arranged along the first direction in the order of the fourth sub-electrode 112d, the third sub-electrode 112c, the second sub-electrode 112b, and the first sub-electrode 112 a.

For example, the first sub-electrode 112a of the first touch electrode assembly 11a is electrically connected to the first sub-electrode 112a of the second touch electrode assembly 11b, the second sub-electrode 112b of the first touch electrode assembly 11a is electrically connected to the second sub-electrode 112b of the second touch electrode assembly 11b, the third sub-electrode 112c of the first touch electrode assembly 11a is electrically connected to the third sub-electrode 112c of the second touch electrode assembly 11b, and the fourth sub-electrode 112d of the first touch electrode assembly 11a is electrically connected to the fourth sub-electrode 112d of the second touch electrode assembly 11 b. For example, each sub-electrode 112 is electrically connected by a corresponding lead 12, and the lead 12 will be described in detail below.

For example, as shown in fig. 2 and fig. 3, the touch structure 10 further includes a plurality of wires 12. For example, as shown in fig. 3, the plurality of wires 12 electrically connected to the first column of touch electrode assemblies 11 includes a first wire 121, a second wire 122, a third wire 123, a fourth wire 124, and the wires 12 in 4 dashed boxes a-D. Since the wires 12 in the dashed boxes a-D are arranged in a similar manner to the first wire 121, the second wire 122, the third wire 123 and the fourth wire 124, only the arrangement manner of the first wire 121, the second wire 122, the third wire 123 and the fourth wire 124 will be described in detail, and the wires 12 in the dashed boxes a-D may be arranged in a similar manner and will not be described in detail.

For example, the plurality of wires 12 respectively connect in series the N sub-electrodes 112 in different touch electrode assemblies 11 in the same column, so as to obtain N mutually insulated signal paths, and the N mutually insulated signal paths are respectively electrically connected with the N secondary touch channels. For example, as shown in fig. 3, the first conductive line 121 connects the first sub-electrode 112a of the first touch electrode assembly 11a in series with the first sub-electrode 112a of the second touch electrode assembly 11b, and is electrically connected to the first sub-touch channel S1 through a first sub-signal line (to be described later); the second conducting wire 122 connects the second sub-electrode 112b of the first touch electrode assembly 11a and the second sub-electrode 112b of the second touch electrode assembly 11b in series, and is electrically connected to the second sub-touch channel S2 through a second sub-signal line (to be described later); the third wire 123 connects the third sub-electrode 112c of the first touch electrode assembly 11a and the third sub-electrode 112c of the second touch electrode assembly 11b in series, and is electrically connected to the third sub-touch channel S3 through a third sub-signal line (to be described later); the fourth conductive line 124 connects the fourth sub-electrode 112d of the first touch electrode assembly 11a and the fourth sub-electrode 112d of the second touch electrode assembly 11b in series, and is electrically connected to the fourth sub-touch channel S4 through a fourth sub-signal line (to be described later).

By analogy, each group of N sub-electrodes 112 in the first column of touch electrode assembly 11 is arranged in a head-to-tail-to-head manner, and each group of N sub-electrodes 112 are respectively and correspondingly connected in series through the wires 12, so that N mutually insulated signal paths are obtained. For example, each signal path is obtained by connecting a plurality of sub-electrodes 112 respectively located in different touch electrode assemblies 11 in series, and N signal paths are respectively electrically connected to N secondary touch channels. That is, 4 signal paths insulated from each other can be obtained by the connection manner of the 4 sub-electrodes 112 in each group of the first row touch electrode assembly 11, the 4 signal paths are electrically connected to the 4 secondary touch channels S1, S2, S3, and S4, respectively, so that the sub-electrodes 112 in the row touch electrode assembly 11 share the 4 secondary touch channels S1, S2, S3, and S4, all the sub-electrodes 112 in the row touch electrode assembly 11 can be driven only by the 4 secondary touch channels S1, S2, S3, and S4, and the 4 sub-electrodes 112 in each touch electrode assembly 11 are driven by the 4 secondary touch channels S1, S2, S3, and S4, respectively. In this way, the number of touch channels can be greatly reduced.

For example, as shown in fig. 3, the plurality of wires 12 are distributed in such a manner as to extend in an S-shape. For example, the plurality of conductive lines 12 are divided into a plurality of groups, and each group of conductive lines 12 is used for connecting the sub-electrodes 112 of two adjacent touch electrode assemblies 11 in the same column in series. The plurality of sets of leads 12 are distributed on both sides of the plurality of sub-electrodes 112 in an S-shaped extending (or serpentine extending) manner as a whole. It should be noted that the conductive lines 12 are not in a continuous S-shape, and the single conductive line 12 is, for example, a straight line or a broken line having multiple segments, and the multiple groups of conductive lines 12 are distributed in an S-shape as a whole. Thus, the plurality of wires 12 can be arranged in the same layer as the touch electrode assembly 11 without crossing each other.

Through the above arrangement and wiring, that is, the N sub-electrodes 112 in each group in the same row of touch electrode assemblies 11 are arranged in an end-to-end manner, and the N sub-electrodes 112 in different touch electrode assemblies 11 in the same row are respectively connected in series by using the wires 12, so that N signal paths can be formed so that the sub-electrodes 112 in the same row of touch electrode assemblies 11 share N secondary touch channels. Therefore, the number of the touch channels of the touch structure 10 is small, so that the touch blind area generated by channel wiring can be reduced, and the narrowing of the lower frame is facilitated, so as to realize the narrow frame. Moreover, the plurality of wires 12 do not cross each other and occupy a smaller wiring area, which not only facilitates wiring, but also enables the touch electrode assembly 11 and the wires 12 to be disposed on the same layer to be compatible with the FSLOC manufacturing process, so that the touch structure 10 is suitable for the FSLOC touch screen. The touch structure 10 requires a small number of masks, which can reduce the cost and improve the process yield.

For example, as shown in fig. 2 and 3, the touch structure 10 further includes a plurality of primary signal lines 13 and a plurality of secondary signal lines 14.

The plurality of main signal lines 13 extend in the first direction and are electrically connected to the main electrodes 111 of the plurality of touch electrode assemblies 11, respectively. For example, each main electrode 111 is connected to one main signal line 13, and the number of the main electrodes 111 is equal to the number of the main signal lines 13. Taking fig. 3 as an example, the master signal line 13 electrically connected to the main electrode 111 in the first column touch electrode assembly 11 includes a first master signal line 131, a second master signal line 132, a third master signal line 133, and a fourth master signal line 134. The first master signal line 131 provides a first master channel M1 for driving the main electrodes 111 in the first row of touch electrode assemblies 11 (i.e., the aforementioned first touch electrode assembly 11a), the second master signal line 132 provides a second master channel M2 for driving the main electrodes 111 in the second row of touch electrode assemblies 11 (i.e., the aforementioned second touch electrode assembly 11b), the third master signal line 133 provides a third master channel M3 for driving the main electrodes 111 in the third row of touch electrode assemblies 11, and the fourth master signal line 134 provides a fourth master channel M4 for driving the main electrodes 111 in the fourth row of touch electrode assemblies 11. For example, one end of the master signal line 13 is directly electrically connected to the corresponding main electrode 111, and the other end of the master signal line 13 is coupled to a touch driving circuit provided separately, so that the main touch channel can drive the corresponding main electrode 111.

For example, the plurality of secondary signal lines 14 extend along the first direction and are divided into a plurality of groups, and the plurality of groups of secondary signal lines 14 are electrically connected to the secondary electrodes 112 in the plurality of rows of touch electrode assemblies 11, respectively. Each set of secondary signal lines 14 includes N secondary signal lines 14, and the N secondary signal lines 14 in each set of secondary signal lines 14 provide N secondary touch channels for driving the secondary electrodes 112 of the touch electrode assemblies 11 located in the same column.

Taking fig. 3 as an example, the set of secondary signal lines 14 electrically connected to the secondary electrodes 112 in the first row of touch electrode assemblies 11 includes 4 secondary signal lines 14, which are a first secondary signal line 141, a second secondary signal line 142, a third secondary signal line 143, and a fourth secondary signal line 144. The 4 secondary signal lines 14 provide 4 secondary touch channels S1, S2, S3 and S4 for driving the secondary electrodes 112 in the first column of touch electrode assemblies 11, respectively.

For example, the first secondary signal line 141 is electrically connected to the first secondary electrode 112a in the last row of the touch electrode assembly 11, and since the first secondary electrode 112a and the first secondary electrodes 112a in the other touch electrode assemblies 11 in the column are already connected in series through the plurality of wires 12 to form a signal path, the first secondary touch channel S1 provided by the first secondary signal line 141 can drive all the first secondary electrodes 112a in the signal path. Similarly, the second secondary signal line 142 is electrically connected to the second secondary electrode 112b in the last row of the touch electrode assembly 11, and since the second secondary electrode 112b and the second secondary electrodes 112b in the other touch electrode assemblies 11 in the row are already connected in series through the plurality of wires 12 to form a signal path, the second secondary touch channel S2 provided by the second secondary signal line 142 can drive all the second secondary electrodes 112b in the signal path. The third sub-signal line 143 is electrically connected to the third sub-electrodes 112c in the last row of the touch electrode assembly 11 in the column, and the third sub-touch channel S3 provided by the third sub-signal line 143 can drive all the third sub-electrodes 112c in the corresponding signal path. The fourth secondary signal line 144 is electrically connected to the fourth secondary electrode 112d in the last row of the touch electrode assembly 11, and the fourth secondary touch channel S4 provided by the fourth secondary signal line 144 can drive all the fourth secondary electrodes 112d in the corresponding signal path.

It should be noted that, in the embodiment of the present disclosure, the secondary signal line 14 and the conductive line 12 are electrically connected to the secondary electrode 112, but they are not the same. One end of the secondary signal line 14 is directly electrically connected to only the sub-electrodes 112 in the last row of touch electrode assemblies 11 (of course, in other embodiments, it may also be directly electrically connected to the sub-electrodes 112 in the first row of touch electrode assemblies 11, which may depend on the wiring manner), and the other end of the secondary signal line 14 is coupled to a touch driving circuit provided separately. The number of the secondary signal lines 14 electrically connected to the sub-electrodes 112 of one row of the touch electrode assembly 11 is only N. Two ends of the conducting wire 12 are directly connected to the corresponding sub-electrodes 112 in two adjacent touch electrode assemblies 11 in the same column, so that the corresponding sub-electrodes 112 in the touch electrode assemblies 11 in the same column are sequentially connected in series. For example, the number of the conductive lines 12 electrically connected to the sub-electrodes 112 of a row of touch electrode assemblies 11 is (Q-1) × N, where Q is the number of rows of the touch electrode assemblies 11 in the touch structure 10.

It should be noted that, in the embodiment of the present disclosure, the connection manner of the main signal line 13 and the secondary signal line 14 and the touch driver circuit separately provided is not limited. For example, in some examples, the touch driving circuit is disposed on the substrate 001, for example, at a lower frame of the substrate 001, and thus the primary signal line 13 and the secondary signal line 14 may be directly electrically connected to the touch driving circuit after extending along the first direction, and different primary signal lines 13 and secondary signal lines 14 are electrically connected to different touch channels in the touch driving circuit. For example, in other examples, the touch driving circuit is disposed outside the substrate 001, for example, at other positions of the corresponding touch device, so that the primary signal line 13 and the secondary signal line 14 can be electrically connected to a flexible circuit board for signal transfer at a lower frame of the substrate 001, and the flexible circuit board is electrically connected to the touch driving circuit, thereby coupling the primary signal line 13 and the secondary signal line 14 to the touch driving circuit. Of course, the primary signal line 13 and the secondary signal line 14 may also be coupled to the touch driving circuit in other suitable manners, which may be determined according to actual needs, and embodiments of the present disclosure are not limited thereto.

For example, the main electrodes 111 of the touch electrode assemblies 11 in the same row are driven by the same main touch channel, so that the number of channels can be further reduced. For example, as shown in fig. 2, the main electrodes 111 of the first row of touch electrode assemblies 11 are all driven by the first main touch channel M1, the main electrodes 111 of the second row of touch electrode assemblies 11 are all driven by the second main touch channel M2, and so on. For example, in this embodiment, since the main signal lines 13 electrically connected to the respective main electrodes 111 are wired independently of each other, the main signal lines 13 electrically connected to the main electrodes 111 in the touch electrode assemblies 11 located in the same row may be electrically connected to each other, for example, merged at the lower frame of the substrate 001 to achieve electrical connection, so that the main electrodes 111 of the touch electrode assemblies 11 located in the same row are driven by the same main touch channel. Of course, the embodiments of the present disclosure are not limited thereto, and in other examples, the main electrodes 111 of the touch electrode assemblies 11 located in the same row may be electrically connected to each other in each row by designing a wiring, and then each row is coupled to a separately provided touch driving circuit through one main signal line 13.

It should be noted that, in the embodiment of the present disclosure, the main electrodes 111 of the touch electrode assemblies 11 located in the same row may also be driven by different main touch channels, for example, the main electrode 111 of each touch electrode assembly 11 is driven by a different main touch channel, which may be determined according to actual requirements, and the embodiment of the present disclosure is not limited thereto.

For example, for the same touch electrode assembly 11, the area of the main electrode 111 is larger than that of the sub-electrode 112. For example, in some examples, the area of the primary electrode 111 is greater than both the area of a single secondary electrode 112 and the sum of the areas of the N secondary electrodes 112. For example, in other examples, the area of the primary electrode 111 is greater than the area of a single secondary electrode 112, while being equal to the sum of the areas of the N secondary electrodes 112.

For example, the shape of the main electrode 111 and the shape of the sub-electrode 112 are both rectangular or square, so that the distribution of the effective touch area is uniform, and the wires 12, the main signal lines 13, and the sub-signal lines 14 are easily wired. It should be noted that, in the embodiment of the present disclosure, the shape of the main electrode 111 and the sub-electrode 112 may also be any suitable shape, such as a circle, a hexagon, a trapezoid, and the like, and the shape of the main electrode 111 may be the same as or different from the shape of the sub-electrode 112, which may be determined according to practical requirements, and the embodiment of the present disclosure is not limited thereto.

For example, in the same touch electrode assembly 11, the length of the main electrode 111 in the first direction is greater than or equal to the length of the distribution area of the N sub-electrodes 112 in the first direction. Since the N sub-electrodes 112 are spaced apart from each other, the length of the distribution area of the N sub-electrodes 112 in the first direction is greater than the sum of the lengths of the N sub-electrodes 112.

For example, the touch structure 10 is a self-capacitance touch structure, and accordingly, the main electrode 111 and the sub-electrode 112 are both self-capacitance touch electrodes. Based on the self-capacitance principle, the touch structure 10 can avoid the problem of low grounding quality, and is beneficial to realizing large-size and folding screens. The working principle of the self-contained touch structure can refer to the conventional design, and is not described in detail herein.

Fig. 4 is a schematic cross-sectional view of a touch structure according to some embodiments of the present disclosure. For example, as shown in fig. 4, the touch electrode assemblies 11 are disposed on the same layer, that is, the main electrodes 111 and the sub-electrodes 112 are disposed on the same layer, for example, on the substrate 001 through the same mask process. Therefore, the touch structure 10 can be compatible with the FSLOC manufacturing process, and the touch structure 10 can be suitable for an FSLOC touch screen. Since the touch electrode assembly 11 has only one layer, the number of masks required by the touch structure 10 is small, which can reduce the cost and improve the process yield. It should be noted that only the substrate 001, the main electrode 111, and the sub-electrode 112 are shown in fig. 4, and other structures and components in the touch structure 10 are not shown in fig. 4, which does not limit the embodiments of the present disclosure.

In the touch structure 10 provided in the embodiment of the present disclosure, the main electrode 111 may be used for a primary touch sensing in a larger range, so that the area of the main electrode 111 may be designed to be larger, and the larger area may reduce the number of electrodes, so that the number of touch channels occupied by the main electrode 111 is small. The sub-electrodes 112 are used for the secondary touch sensing of the fine area, and in order to ensure the accuracy, the area of the sub-electrodes 112 is designed to be smaller, and the number of the sub-electrodes 112 is larger, however, no matter how long the size of the touch structure 10 in the first direction (e.g. the column direction), the sub-electrodes 112 in the same column of touch electrode assembly 11 only use N (e.g. 4) secondary touch channels, thereby greatly reducing the number of the touch channels. Therefore, the touch structure 10 can solve the problem of large number of design channels of a general FSLOC touch screen.

For example, a 6.53 inch FSLOC touch screen using the touch structure shown in fig. 1 typically requires 352 touch channels, and channel routing results in more touch dead zones. However, the FSLOC touch screen of 6.53 inches using the touch structure 10 provided by the embodiment of the present disclosure only needs 70 to 80 touch channels, the number of channels is greatly reduced compared to the general FSLOC touch screen, the number of channels is less, a touch blind area generated by channel wiring is reduced, and a narrow bezel is also facilitated, for example, a lower bezel is facilitated to be narrowed.

It should be noted that, in the embodiment of the present disclosure, the touch structure 10 may further include more components to achieve more comprehensive functions. For example, the touch structure 10 may further include a touch driving circuit, a package structure, and the like, which may be determined according to actual requirements, and the embodiments of the present disclosure are not limited thereto.

Fig. 5 is a schematic diagram of a touch detection method of a touch structure according to some embodiments of the present disclosure. The operation principle of the touch structure 10 provided in the embodiment of the present disclosure is briefly described below with reference to fig. 5.

For example, the touch structure 10 employs a self-capacitance touch principle. When a finger of a user touches a touch screen including the touch structure 10, electrodes at a touch position (e.g., the main electrode 111 and/or the sub-electrode 112) are coupled due to the proximity of the finger, so that a self-capacitance is increased, and a touch breakpoint position (i.e., a touch position) can be obtained by detecting a capacitance signal variation and processing and calculating the capacitance signal variation. For example, the detection, processing, and calculation of the signal may be implemented by using a touch driving Circuit provided separately, for example, a touch Integrated Circuit Chip (IC).

For example, the main electrode 111 has a larger area and a larger sensing range, and is mainly used for sensing a rough area touched by a finger, that is, the main electrode 111 can perform primary touch sensing to sense a touch trace position in the vicinity of the area where the main electrode 111 is located. On the premise that a touch is sensed near the area where one of the main electrodes 111 is located, the sub-electrode 112 senses the accurate position, that is, senses the secondary touch. The sub-electrodes 112 have a smaller area and a larger number, and at least 4 different sub-electrodes 112 are corresponding to the vicinity of the region where one main electrode 111 is located. The distance difference between the touch report position and each of the main electrode 111 and the sub-electrode 112 will generate a variation difference of the self-capacitance signal amount, and the touch report position can be obtained by combining the touch report algorithm. For example, the touch-pointing algorithm may be a general gravity center algorithm, a weighting algorithm, or any other suitable algorithm, which is not limited in this respect by the embodiments of the present disclosure.

For example, as shown in fig. 5, when the user's finger touches 4 positions P1, P2, P3 and P4 on the touch screen including the touch structure 10, respectively, a method of calculating the touch hit position using a weighting algorithm is as follows.

When a finger touches the position P1, the main touch channel M3 and the secondary touch channels S6 and S7 generate a more obvious variation in the amount of self-capacitance signals. From the self-contained semaphore variations, the respective weights can be determined using a weighting algorithm, e.g., M3: 80%, S6: 20%, S7: 25 percent. The touch control drive circuit performs algorithm calculation to obtain the touch control report point position corresponding to P1.

It should be noted that although the primary touch channel M3 corresponds to a plurality of primary electrodes 111 in a row of the touch electrode assembly 11, and the secondary touch channels S6 and S7 correspond to a plurality of secondary electrodes 112 in a column of the touch electrode assembly 11, the number of rows corresponding to the primary touch channel M3 can be used to determine which two secondary electrodes 112 in the column the secondary touch channels S6 and S7 correspond to, and the number of columns corresponding to the secondary touch channels S6 and S7 can be used to determine which primary electrode 111 in the row the primary touch channel M3 corresponds to, so that the primary electrode 111 corresponding to the primary touch channel M3 and the secondary electrodes 112 corresponding to the secondary touch channels S6 and S7 in the secondary touch detection can be uniquely determined, and thus an accurate touch spot position can be obtained.

When a finger touches the position P2, the main touch channel M2 and the secondary touch channels S10, S11, and S12 generate a more obvious variation in the amount of self-capacitance signal. From the self-contained semaphore variations, the respective weights can be determined using a weighting algorithm, e.g., M2: 30%, S10: 30%, S11: 90%, S12: 40 percent. The touch control drive circuit performs algorithm calculation to obtain the touch control report point position corresponding to P2.

It should be noted that the number of rows corresponding to the primary touch channel M2 may be used to determine which three secondary electrodes 112 in the column the secondary touch channels S10, S11, and S12 correspond to, and the number of columns corresponding to the secondary touch channels S10, S11, and S12 may be used to determine which main electrode 111 in the row the primary touch channel M2 corresponds to, so that the main electrode 111 corresponding to the primary touch channel M2 and the secondary electrodes 112 corresponding to the secondary touch channels S10, S11, and S12 in the secondary touch detection may be uniquely determined.

When a finger touches the position P3, the main touch channels M3 and M4 and the secondary touch channel S16 generate a more obvious variation in the amount of self-capacitance signals. From the self-contained semaphore variations, the respective weights can be determined using a weighting algorithm, e.g., M3: 20%, M4: 20%, S16: 80 percent. The touch control drive circuit performs algorithm calculation to obtain the touch control report point position corresponding to P3.

It should be noted that the number of rows corresponding to the primary touch channels M3 and M4 may be used to determine which secondary electrode 112 in the column the secondary touch channel S16 corresponds to (at this time, two secondary electrodes 112 driven by the secondary touch channel S16 and located near the position P3 are adjacent, and therefore, neither of them is determined as the corresponding secondary electrode 112, and meanwhile, the number of columns corresponding to the secondary touch channel S16 may be used to determine which primary electrode 111 in each row the primary touch channels M3 and M4 correspond to, so that the primary electrodes 111 corresponding to the primary touch channels M3 and M4 and the secondary electrodes 112 corresponding to the secondary touch channel S16 in the secondary touch detection may be uniquely determined.

When a finger touches the position P4, the main touch channel M2 generates a relatively obvious variation in the self-capacitance signal amount, and the secondary touch channels S18, S19, S22 and S23 generate a slight variation in the self-capacitance signal amount. From the self-contained semaphore variations, the respective weights can be determined using a weighting algorithm, e.g., M2: 95%, S18: 6%, S19: 7%, S22: 8%, S23: 9 percent. The touch control drive circuit performs algorithm calculation to obtain the touch control report point position corresponding to P4. Here, when the finger touches the position P4, although the sub-electrodes 112 corresponding to the secondary touch channels S18, S19, S22 and S23 are not covered by the finger, the corresponding sub-electrodes 112 may generate a variation in self-capacitance signal amount, but the variation amount is small. Therefore, the finger does not need to cover the electrode to generate the self-capacitance signal amount change, and the finger approaches the electrode to generate the self-capacitance signal amount change.

It should be noted that, the number of rows corresponding to the primary touch channel M2 may be used to determine which of the secondary electrodes 112 in the corresponding columns correspond to the secondary touch channels S18, S19, S22, and S23, and the main electrode 111 corresponding to the primary touch channel M2 is located between the two columns of the secondary electrodes 112 according to the number of columns corresponding to the secondary touch channels S18, S19, S22, and S23 and slight changes of the numbers, so that the main electrode 111 corresponding to the primary touch channel M2 and the secondary electrodes 112 corresponding to the secondary touch channels S18, S19, S22, and S23 in the secondary touch detection may be uniquely determined.

For example, the variation of the self-capacitance signal level of each of the primary touch channel and the secondary touch channel may be obtained in any suitable manner before the touch location is calculated based on the variation of the self-capacitance signal level.

For example, in some examples, the main sensing signals of all main electrodes 111 in the touch structure 10 are first detected, that is, the main sensing signals of all main touch channels are detected, and the touch area is determined according to the main sensing signals. For example, when the main electrodes 111 of the touch electrode assemblies 11 in the same row are driven by the same main touch channel, the touch area may be an area where a certain row of touch electrode assemblies 11 is located. For another example, when the main electrodes 111 of the touch electrode assemblies 11 in the same row are driven by different main touch channels, the touch area may be an area where one touch electrode assembly 11 is located. Therefore, primary touch sensing is completed.

Then, a secondary sensing signal of the sub-electrode 112 located in the touch area is detected, that is, a secondary sensing signal of a secondary touch channel corresponding to the touch area is detected. For example, when the touch area is an area where a certain row of touch electrode assemblies 11 is located, it is necessary to detect the secondary sensing signals of all the secondary touch channels. For another example, when the touch area is an area where one touch electrode assembly 11 is located, the secondary sensing signals of N secondary touch channels corresponding to the touch electrode assembly 11 need to be detected. Therefore, secondary touch sensing is completed.

Finally, the touch position is determined based on the primary sensing signal of the primary electrode 111 and the secondary sensing signal of the secondary electrode 112. Here, the sensing signal of the main electrode 111 is referred to as a main sensing signal, the sensing signal of the sub electrode 112 is referred to as a sub sensing signal, and both the main sensing signal and the sub sensing signal are signals detected by corresponding touch channels, and may be the same type of signal.

By the method, the number of signals required to be detected in each touch detection can be reduced, and the calculation amount is reduced.

For example, in other examples, the primary sensing signals of all the primary electrodes 111 and the secondary sensing signals of all the secondary electrodes 112 in the touch structure 10 are detected first. For example, simultaneous detection or sequential detection may be possible. Then, a touch position is determined based on the primary sensing signal and the secondary sensing signal. The method is simple to operate, can be compatible with a common self-capacitance touch detection method, and facilitates algorithm transplantation.

At least one embodiment of the present disclosure further provides a touch panel including the touch structure provided in any one of the embodiments of the present disclosure. The touch panel has the advantages that the number of touch channels is small, touch blind areas caused by channel wiring are reduced, narrow frames are favorably realized, the number of required masks is small, the cost can be reduced, the process yield is improved, the problem of low grounding quality can be avoided, and the realization of large-size and folding screens is facilitated.

Fig. 6 is a schematic block diagram of a touch panel according to some embodiments of the present disclosure. For example, as shown in fig. 6, the touch panel 20 includes a touch structure 21. The touch structure 21 is a touch structure provided in any embodiment of the present disclosure, for example, the touch structure 10 shown in fig. 2 to 5. For example, the touch panel 20 may be a touch display panel, such as a liquid crystal touch display panel, an Organic Light-Emitting Diode (OLED) touch display panel, a Quantum Dot Light-Emitting Diode (QLED) touch display panel, or the like, or may be a touch panel without a display function. The touch panel 20 can be applied to any product or component with a touch function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, a game machine, a display, a digital photo frame, and a navigator.

Fig. 7 is a schematic cross-sectional view of another touch panel according to some embodiments of the present disclosure. For example, as shown in fig. 7, in addition to the touch structure 21, the touch panel 20 further includes a display structure 22, and the display structure 22 is configured to display. For example, the touch structure 21 and the display structure 22 are stacked.

For example, the touch structure 21 and the display structure 22 may form an On-Cell (On-Cell) structure, in which case the display structure 22 may be a common display panel, such as a liquid crystal display panel, an OLED display panel, or a QLED display panel. In such a structure, the display structure 22 may include, for example, an array substrate and a counter substrate disposed opposite the array substrate, for example, combined with each other to form a space to accommodate a liquid crystal material or an OLED device. The touch structure 21 is formed directly on the counter substrate, for example, and the counter substrate of the display structure 22 is the base substrate 001.

For another example, the touch structure 21 and the display structure 22 may form an In-Cell (In-Cell) structure, In which case the display structure 22 may be an array substrate. For example, an electroluminescent material or a liquid crystal layer is disposed on the array substrate. In this structure, the array substrate serves as the substrate 001, and each touch electrode assembly 11 in the touch structure 21 is disposed on the array substrate. Of course, the array substrate may further include a plurality of functional film layers, which may be determined according to actual requirements.

It should be noted that, in the embodiment of the disclosure, the touch panel 20 may further include more components and structures, for example, a Gate Driver On Array (GOA) circuit may also be included, which may be determined according to actual requirements, and the embodiment of the disclosure is not limited thereto. For detailed description and technical effects of the touch panel 20, reference may be made to the above description of the touch structure 10, which is not repeated herein.

At least one embodiment of the present disclosure further provides a touch driving method, where the touch driving method is used to drive a touch structure provided in any embodiment of the present disclosure. By using the touch driving method, the number of touch channels can be reduced, touch blind areas generated by channel wiring are reduced, narrow frames can be realized, the problem of low grounding quality can be avoided, and large-size and folding screens can be realized.

For example, in some embodiments, the touch driving method includes the following operations:

step S30: the main sensing signal of the main electrode 111 and the secondary sensing signal of the sub-electrode 112 are detected, and the touch position is determined based on the main sensing signal and the secondary sensing signal.

For example, in step S30, the touch driving circuit may be used to detect the sensing signals of the primary touch channel corresponding to the primary electrode 111 and the secondary touch channel corresponding to the secondary electrode 112, so as to obtain a primary sensing signal and a secondary sensing signal. For example, the touch hit location may be obtained using a touch hit algorithm. For example, the touch-pointing algorithm may be a general gravity center algorithm, a weighting algorithm, or any other suitable algorithm, which is not limited in this respect by the embodiments of the present disclosure.

For example, in some examples, as shown in fig. 8, the step S30 may include the following operations:

step S31: detecting main sensing signals of all main electrodes 111 in the touch structure 10, and determining a touch area according to the main sensing signals of the main electrodes 111;

step S32: detecting a secondary sensing signal of the sub-electrode 112 located in the touch area;

step S33: based on the primary sensing signal of the primary electrode 111 and the secondary sensing signal of the secondary electrode 112, the touch position is determined.

For example, in other examples, as shown in fig. 9, the step S30 may also include the following operations:

step S34: detecting primary sensing signals of all the primary electrodes 111 and secondary sensing signals of all the secondary electrodes 112 in the touch structure 10;

step S35: and determining the touch position based on the primary sensing signal and the secondary sensing signal.

For the detailed description of the above steps S30-S35, reference may be made to the description of fig. 5, which is not repeated herein.

It should be noted that, in the embodiment of the present disclosure, the touch driving method may further include more steps, and the steps may be executed sequentially or in parallel. Although the touch driving method described above includes a plurality of steps that appear in a specific order, it should be clearly understood that the order of the plurality of steps is not limited. For detailed description and technical effects of the touch driving method, reference may be made to the above description of the touch structure 10, which is not repeated herein.

The following points need to be explained:

(1) the drawings of the embodiments of the disclosure only relate to the structures related to the embodiments of the disclosure, and other structures can refer to common designs.

(2) Without conflict, embodiments of the present disclosure and features of the embodiments may be combined with each other to arrive at new embodiments.

The above description is only a specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and the scope of the present disclosure should be subject to the scope of the claims.

Claims

A touch structure comprises a plurality of touch electrode assemblies, wherein the touch electrode assemblies are arranged in an array,

at least some of the touch electrode combinations include a main electrode and a set of N sub-electrodes, the N sub-electrodes are arranged in parallel in a first direction, the N sub-electrodes are arranged in parallel with the main electrode in a second direction, and the first direction and the second direction are crossed,

the N sub-electrodes of the touch electrode combination are respectively driven by N secondary touch channels, the main electrode is driven by a main touch channel, and N is an integer greater than 1.
The touch structure of claim 1, wherein the main electrodes of the touch electrode assemblies in the same row are in the same row and are driven by different main touch channels, and the plurality of N sub-electrodes of the touch electrode assemblies in the same row are in the same row and are respectively driven by the same N sub-touch channels.
The touch structure of claim 2, wherein the plurality of secondary touch channels for driving the secondary electrodes of different columns of touch electrode combinations are different.
The touch structure of claim 2, further comprising a plurality of conductive lines,

the plurality of wires enable the N sub-electrodes in different touch electrode combinations in the same column to be correspondingly connected in series respectively to obtain N mutually insulated signal paths, and the N mutually insulated signal paths are electrically connected with the N secondary touch channels respectively.
The touch structure of claim 4, wherein two adjacent touch electrode assemblies in the same column include a first touch electrode assembly and a second touch electrode assembly, the N sub-electrodes of the first touch electrode assembly are electrically connected to the N sub-electrodes of the second touch electrode assembly, and the N sub-electrodes of the first touch electrode assembly and the N sub-electrodes of the second touch electrode assembly are arranged in an opposite order along the first direction.
The touch structure of claim 5, wherein each of the at least some touch electrode combinations comprises 4 sub-electrodes, the 4 sub-electrodes comprising a first sub-electrode driven by a first sub-touch channel, a second sub-electrode driven by a second sub-touch channel, a third sub-electrode driven by a third sub-touch channel, and a fourth sub-electrode driven by a fourth sub-touch channel,

the sub-electrodes of the first touch electrode combination are arranged along the first direction in the sequence of first sub-electrode-second sub-electrode-third sub-electrode-fourth sub-electrode, and the sub-electrodes of the second touch electrode combination are arranged along the first direction in the sequence of fourth sub-electrode-third sub-electrode-second sub-electrode-first sub-electrode.
The touch structure of claim 4, wherein the plurality of conductive lines are distributed in an S-shaped extending manner.
The touch structure of claim 1 or 2, wherein the main electrodes of the touch electrode assemblies in the same row are driven by the same main touch channel.
The touch structure of any one of claims 1 to 8, wherein for a same touch electrode combination, the area of the main electrode is larger than the area of the sub-electrode.
The touch structure of any one of claims 1-9, further comprising a plurality of primary signal lines and a plurality of secondary signal lines,

the plurality of main signal lines extend along the first direction and are respectively electrically connected with main electrodes in the plurality of touch electrode combinations,

the plurality of secondary signal lines extend along the first direction and are divided into a plurality of groups, the plurality of groups of secondary signal lines are respectively electrically connected with the secondary electrodes in the touch electrode combinations in multiple rows, each group of secondary signal lines comprises N secondary signal lines, and the N secondary signal lines in each group of secondary signal lines provide N secondary touch channels for driving the secondary electrodes of the touch electrode combinations in the same row.
The touch structure of claim 10, wherein the main signal lines electrically connected to the main electrodes of the touch electrode combinations in the same row are electrically connected to each other.
The touch structure of any one of claims 1 to 11, wherein the shape of the primary electrode and the shape of the secondary electrode are both rectangular or square.
The touch structure of any one of claims 1 to 12, wherein in a same touch electrode combination, a length of the main electrode in the first direction is greater than or equal to a length of a distribution area of the N sub-electrodes in the first direction.
The touch structure of any one of claims 1 to 13, wherein the touch structure is a self-capacitance touch structure, and the main electrode and the sub-electrode are both self-capacitance touch electrodes.
The touch structure of any one of claims 1 to 14, wherein the touch electrode assemblies are disposed on the same layer.
A touch panel comprising the touch structure of any one of claims 1-15.
The touch panel of claim 16, further comprising a display structure, wherein the touch structure is stacked with the display structure.
A touch driving method for the touch structure of any of claims 1-15, comprising:

and respectively detecting a main induction signal of the main electrode and a secondary induction signal of the secondary electrode, and determining a touch position based on the main induction signal and the secondary induction signal.
The touch driving method according to claim 18, wherein the detecting the primary sensing signal of the primary electrode and the secondary sensing signal of the secondary electrode, respectively, and the determining the touch position based on the primary sensing signal and the secondary sensing signal comprise:

detecting main induction signals of all main electrodes in the touch structure, and determining a touch area according to the main induction signals of the main electrodes;

detecting a secondary induction signal of a secondary electrode positioned in the touch area;

determining the touch position based on the primary sensing signal of the primary electrode and the secondary sensing signal of the secondary electrode.
The touch driving method according to claim 18, wherein the detecting the primary sensing signal of the primary electrode and the secondary sensing signal of the secondary electrode, respectively, and the determining the touch position based on the primary sensing signal and the secondary sensing signal comprise:

detecting main induction signals of all main electrodes and secondary induction signals of all secondary electrodes in the touch structure;

determining the touch position based on the primary sensing signal and the secondary sensing signal.