CN115701774A

CN115701774A - Touch substrate, touch driving method, identification method of touch input equipment and touch equipment

Info

Publication number: CN115701774A
Application number: CN202180041426.XA
Authority: CN
Inventors: 郝帅凯
Original assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Shirui Electronics Co Ltd
Current assignee: Guangzhou Shiyuan Electronics Thecnology Co Ltd; Guangzhou Shirui Electronics Co Ltd
Priority date: 2021-06-01
Filing date: 2021-06-01
Publication date: 2023-02-10
Also published as: WO2022252115A1

Abstract

The invention discloses a touch substrate, a touch driving method, a touch input equipment identification method and a touch equipment, wherein the touch substrate provided by the embodiment of the invention comprises the following steps: the receiving electrodes extend along a first direction, the driving electrodes extend along a second direction, the receiving electrodes are not in contact with the driving electrodes, vertical projections on the carrier substrate are mutually staggered, the receiving electrodes comprise at least two sub-electrodes, the sub-electrodes comprise electrode units which are arranged at intervals along the first direction, all the electrode units in the same sub-electrode are electrically connected, and the electrode units of different sub-electrodes are arranged at intervals. In the scanning process, the same excitation signal can be applied to at least two driving electrodes simultaneously, so that the scanning time can be reduced, the scanning speed is increased, the point reporting speed is increased, and the touch delay is reduced.

Description

Touch substrate, touch driving method, identification method of touch input equipment and touch equipment

Technical Field

The invention relates to the technical field of touch control, in particular to a touch control substrate, a touch control driving method, a touch control input equipment identification method and touch control equipment.

Background

The touch technology is an auxiliary display technology, especially a mutual capacitance touch screen, plays an important role, and is widely applied to smart phone, tablet and smart watch markets.

The mutual capacitance touch screen comprises a scanning electrode and a receiving electrode, and mutual capacitance is formed at the position where two groups of electrodes are crossed. The mutual capacitance touch screen scans and measures the mutual capacitance between two electrodes which are vertically crossed on the screen, and when a finger of a person or input equipment approaches or contacts the surface of the mutual capacitance touch screen, the two ends of a capacitor formed by the originally crossed electrodes on the screen are equivalently connected with a new capacitor in parallel, so that the total mutual capacitance is reduced. When the mutual capacitance is detected, the transverse electrodes sequentially send out excitation signals, and the longitudinal electrodes simultaneously receive sensing signals, so that the capacitance value of the intersection point of the transverse electrodes and the receiving electrodes, namely the capacitance value of the two-dimensional plane of the whole touch screen can be obtained. The measuring circuit in the touch chip measures the mutual capacitance, can sense the variation of the mutual capacitance, and further calculates the touch position of the touch point according to the variation.

With the increase of the size of the touch screen and the improvement of the touch precision, the number of scanning electrodes is increased, so that the scanning time is prolonged, the pointing speed is slow, and the problem of long touch delay is caused.

Disclosure of Invention

The embodiment of the invention provides a touch substrate, a touch driving method, a touch input equipment identification method and touch equipment, which can reduce scanning time, improve point reporting speed and further reduce touch delay.

In a first aspect, an embodiment of the present invention provides a touch substrate, including: a carrier substrate;

the receiving electrodes extend along a first direction, the driving electrodes extend along a second direction, the receiving electrodes are not in contact with the driving electrodes, and vertical projections on the carrier substrate are mutually staggered;

the receiving electrode comprises at least two sub-electrodes, and the sub-electrodes comprise electrode units arranged at intervals along the first direction;

and all the electrode units in the same sub-electrode are electrically connected, and the electrode units of different sub-electrodes are alternately arranged.

Optionally, the touch substrate includes a first conductive layer and a second conductive layer, the receiving electrode is located on the first conductive layer, the driving electrode is located on the second conductive layer, and an insulating layer is disposed between the first conductive layer and the second conductive layer.

Optionally, a plurality of first grooves extending along the second direction are formed in the carrier substrate, the driving electrodes are disposed in the first grooves, a plurality of second grooves extending along the first direction are disposed on one side, away from the carrier substrate, of the insulating layer, and the electrode units are disposed in the second grooves.

Optionally, the electrode unit is a block grid, and the driving electrode is a strip grid.

Optionally, the touch substrate includes a third conductive layer and a fourth conductive layer, and an insulating layer is disposed between the third conductive layer and the fourth conductive layer;

the receiving electrode is arranged on the third conducting layer;

the electrode unit comprises a first electrode block, a second electrode block and a connecting part, and the first electrode block and the second electrode block are electrically connected through the connecting part;

the driving electrode comprises a plurality of third electrode blocks arranged along the second direction and a plurality of conductive bridges;

the third electrode block is arranged on the third conducting layer, the third electrode block is insulated and isolated from the electrode unit, and the conducting bridge is arranged on the fourth conducting layer;

the conductive bridge and the connecting part are mutually staggered in the vertical projection in the plane of the carrier substrate, and two adjacent third electrode blocks are electrically connected through the conductive bridge.

Optionally, the insulating layer is provided with a plurality of through holes penetrating through the insulating layer, the third electrode block includes an extension portion extending into the through hole, and the third electrode block is electrically connected with the conductive bridging bridge through the extension portion.

Optionally, a plurality of third grooves extending along the second direction are disposed on the carrier substrate, and the conductive bridge is disposed in the third grooves;

one side of the insulating layer, which is far away from the carrier substrate, is provided with a plurality of fourth grooves arranged along the first direction and a plurality of fifth grooves arranged along the second direction, the first electrode block and the second electrode block are respectively arranged in the corresponding fourth grooves, and the third electrode block is arranged in the fifth grooves.

Optionally, in the electrode unit, the first electrode block and the second electrode block are two isosceles triangles with opposite vertexes, and the central lines of the bottom sides of the first electrode block and the second electrode block are overlapped and parallel to the first direction.

Optionally, in the same sub-electrode, two adjacent electrode units are electrically connected through a wire, and the electrode units and the wire are arranged on the insulating layer in the same layer.

Optionally, the receiving electrode includes two sub-electrodes.

In a second aspect, an embodiment of the present invention provides a touch driving method, based on the touch substrate provided in the first aspect of the present invention, including:

simultaneously applying the same excitation signal to at least two drive electrodes which are not applied with the overdrive signals, wherein the number of the drive electrodes simultaneously applied with the excitation signals is equal to the number of the sub-electrodes in one receiving electrode;

simultaneously receiving the sensing signals of the sub-electrodes;

the above steps are repeated until all the drive electrodes are applied with the overdrive signal.

In a third aspect, an embodiment of the present invention provides a method for identifying a touch input device, where based on a touch substrate provided in the first aspect of the present invention, the method includes:

simultaneously applying excitation signals to at least two drive electrodes to which the overdrive signals are not applied, wherein the number of the drive electrodes to which the excitation signals are simultaneously applied is equal to the number of the sub-electrodes in one receiving electrode, and the applied excitation signals of the drive electrodes have different frequencies;

exchanging the applied excitation signals of the at least two drive electrodes such that the frequency of the applied excitation signal of each drive electrode is different from the frequency of the previously applied excitation signal;

repeating the steps until each driving electrode of the at least two driving electrodes is applied with an excitation signal with each frequency once;

repeating the steps until all the driving electrodes are applied with overdrive signals;

the operating frequency of the touch input device is determined based on the response of the touch input device to the excitation signal at each frequency.

In a fourth aspect, an embodiment of the present invention provides a touch device, including the touch substrate provided in the first aspect of the present invention, further including a driver, a receiver, and a controller;

the controller is respectively connected with the driver and the receiver, the driver is connected with the driving electrode, and the receiver is connected with the sub-electrode of the receiving electrode;

the controller is used for controlling the driver to simultaneously apply the same excitation signal to at least two driving electrodes which are not applied with the excitation signal, wherein the number of the driving electrodes applied with the excitation signal simultaneously is equal to that of the sub-electrodes in one receiving electrode;

the controller is used for controlling the driver to repeat the steps until all the driving electrodes are applied with overdrive signals;

the receiver is used for receiving the sensing signals of the sub-electrodes when the driver applies the excitation signals and sending the sensing signals to the controller;

the controller is used for calculating the position of the touch point according to the sensing signal.

In a fifth aspect, an embodiment of the present invention further provides a touch device, including the touch substrate provided in the first aspect of the present invention, further including a driver, a receiver, and a controller;

the controller is used for controlling the driver to simultaneously apply the excitation signals to at least two drive electrodes which are not applied with the excitation signals, wherein the number of the drive electrodes simultaneously applied with the excitation signals is equal to the number of the sub-electrodes in one receiving electrode, and the applied excitation signals of the drive electrodes have different frequencies;

the controller is used for controlling the driver to exchange the applied excitation signals of the at least two driving electrodes, so that the frequency of the applied excitation signal of each driving electrode is different from that of the previous applied excitation signal;

the controller is used for controlling the driver to repeat the steps until each driving electrode in the at least two driving electrodes is applied with an excitation signal with each frequency once;

the controller is configured to determine an operating frequency of the touch input device based on a response of the touch input device to excitation signals of different frequencies.

The touch substrate provided by the embodiment of the invention comprises: the receiving electrodes extend along a first direction, the driving electrodes extend along a second direction, the receiving electrodes are not in contact with the driving electrodes, vertical projections on the carrier substrate are mutually staggered, the receiving electrodes comprise at least two sub-electrodes, the sub-electrodes comprise electrode units which are arranged at intervals along the first direction, all the electrode units in the same sub-electrode are electrically connected, and the electrode units of different sub-electrodes are alternately arranged. In the scanning process, the same excitation signal can be applied to at least two driving electrodes simultaneously, so that the scanning time can be reduced, the scanning speed is increased, the point reporting speed is increased, and the touch delay is reduced.

Drawings

The invention is explained in more detail below with reference to the figures and examples.

Fig. 1 is a top view of a touch substrate according to an embodiment of the invention;

FIG. 2 is a schematic structural diagram of a seed electrode according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a touch substrate of the prior art;

fig. 4 is a schematic diagram illustrating an operation of the touch substrate shown in fig. 1 according to an embodiment of the present invention;

fig. 5 is a top view of another touch substrate provided in the present invention;

FIG. 6 is a partial cross-sectional view of the touch substrate of FIG. 1;

fig. 7 is a cross-sectional view of another touch substrate provided in the present invention;

fig. 8 is a top view of another touch substrate according to an embodiment of the invention;

FIG. 9 is a schematic structural diagram of another seed electrode according to an embodiment of the present invention;

fig. 10 is a schematic diagram illustrating an operation of the touch substrate shown in fig. 8 according to an embodiment of the invention;

FIG. 11 is a partial cross-sectional view of the touch substrate of FIG. 8;

fig. 12 is a cross-sectional view of another touch substrate according to an embodiment of the invention;

FIG. 13 is a schematic diagram illustrating recognition of a plurality of touch input devices according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a touch device according to an embodiment of the present invention.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be further described in detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

The embodiment of the invention provides a touch substrate, which can be used for a touch display device to realize touch operation and can reduce touch delay. Fig. 1 is a top view of a touch substrate according to an embodiment of the invention, as shown in fig. 1, the touch substrate includes a carrier substrate 110, a plurality of receiving electrodes 120, and a plurality of driving electrodes 130.

The carrier substrate 110 may be a transparent insulating plate, such as a PET substrate (polyethylene terephthalate), or a transparent insulating plate made of other insulating materials, which is not limited herein. The receiving electrodes 120 and the driving electrodes 130 are disposed on the carrier substrate 110, and the receiving electrodes 120, the driving electrodes 130, and the receiving electrodes 120 and the driving electrodes 130 are insulated and isolated from each other. The receiving electrode 120 extends along a first direction X, the driving electrode 130 extends along a second direction Y intersecting with the first direction X, the vertical projections of the receiving electrode 120 and the driving electrode 130 in the plane of the carrier substrate 110 are mutually intersected, and the receiving electrode 120 and the driving electrode 130 are insulated and isolated at the intersection. In other words, the receiving electrode 120 crosses the driving electrode 130, but does not contact at the crossing position in the thickness direction of the carrier substrate 110, forming a capacitance node. For example, as shown in fig. 1, in the embodiment of the present invention, the first direction X is perpendicular to the second direction Y, and in other embodiments of the present invention, the first direction X and the second direction Y may not be perpendicular as long as they intersect, and the embodiment of the present invention is not limited herein.

The receiving electrode comprises at least two sub-electrodes, and the sub-electrodes comprise electrode units arranged at intervals along a first direction. All the electrode units in the same sub-electrode are electrically connected, and the electrode units of different sub-electrodes are alternately arranged. Exemplarily, fig. 2 is a schematic structural diagram of a sub-electrode in an embodiment of the present invention, as shown in fig. 2, the receiving electrode 120 includes two sub-electrodes, which are a first sub-electrode 121 and a second sub-electrode 122, respectively, and each of the first sub-electrode 121 and the second sub-electrode 122 includes electrode units 123 arranged at intervals along the first direction X. The electrode units in the same sub-electrode are electrically connected, and for example, as shown in fig. 2, two adjacent electrode units 123 in the first sub-electrode 121 are electrically connected through a conducting wire L1, and two adjacent electrode units 123 in the second sub-electrode 122 are electrically connected through a conducting wire L2. The electrode units of the different sub-electrodes are alternately arranged, and for example, as shown in fig. 2, in the receiving electrode 120, the electrode unit 123 of the first sub-electrode 121 and the electrode unit 123 of the second sub-electrode 122 are alternately arranged.

Fig. 3 is a schematic diagram of a touch substrate in the prior art, as shown in fig. 3, driving electrodes (transversely arranged electrodes) and receiving electrodes (longitudinally arranged electrodes) alternately form a grid shape one by one, the driving electrodes sequentially send excitation signals (sequentially drive D1, D2, and … D6), each time one driving electrode is driven, the receiving electrodes S1 to S5 simultaneously complete sensing and output sensing data, the data sensed by the receiving electrodes S1 to S5 are stored in a row corresponding to a sensing data array, and then the next driving electrode is driven, and when all the driving electrodes complete scanning, scanning of one frame of data is completed. I.e. 6 scans are required to complete a scan of one frame of data.

The embodiment of the invention also provides a touch driving method, based on the touch substrate provided by the embodiment, the touch driving method comprises the following steps:

simultaneously receiving the sensing signals of the sub-electrodes;

Fig. 4 is a schematic diagram of the operation of the touch substrate shown in fig. 1 according to the embodiment of the present invention, and the touch substrate shown in fig. 1 is taken as an example to describe a touch driving method according to the present invention.

For example, as shown in fig. 4, the touch substrate includes 8 receiving electrodes 120 and 6 driving electrodes 130, each receiving electrode 120 includes 2 sub-electrodes, each sub-electrode is a receiving channel, there are 16 receiving channels, which are respectively receiving channels RX1 to RX16, and each receiving electrode corresponds to an even channel and an odd channel. The 6 driving electrodes 130 are 6 input channels, namely input channels TX1-TX6. In the application process, each driving can simultaneously input the same excitation signal to 2 input channels, as shown in fig. 4, the input channels TX1 and TX2 are connected in parallel for simultaneously inputting the same excitation signal, the input channels TX3 and TX4 are connected in parallel for simultaneously inputting the same excitation signal, and the input channels TX5 and TX6 are connected in parallel for simultaneously inputting the same excitation signal. In each driving operation, the 16 receiving channels RX1 to RX16 simultaneously receive sensing signals, the sensing signals received by the row electrode units 123 sensed by the input channel TX1 are stored in the odd rows of the sensing data array via the odd channels, and the sensing signals received by the row electrode units 123 sensed by the input channel TX2 are stored in the even rows of the sensing data array via the even channels. Therefore, only 3 times of scanning are needed to complete scanning of one frame of data, the scanning times are reduced by half compared with the scanning times of the touch substrate in the prior art, the scanning speed is doubled, the point reporting speed is further improved, and the touch delay is reduced.

The touch substrate provided by the embodiment of the invention comprises: the receiving electrodes extend along a first direction, the driving electrodes extend along a second direction staggered with the first direction, the receiving electrodes are not in contact with the driving electrodes, vertical projections on the carrier substrate are staggered with one another, the receiving electrodes comprise at least two sub-electrodes, the sub-electrodes comprise electrode units arranged at intervals along the first direction, all electrode units in the same sub-electrode are electrically connected, and the electrode units of different sub-electrodes are alternately arranged. In the scanning process, the same excitation signal can be applied to at least two driving electrodes simultaneously, so that the scanning time can be reduced, the scanning speed is increased, the point reporting speed is increased, and the touch delay is reduced.

Fig. 5 is a top view of another touch substrate provided in the present invention, as shown in fig. 5, in this embodiment, the electrode units 123 are block grids, and the driving electrodes 130 are strip grids. The grid-shaped driving electrode 130 or the receiving electrode 120 can improve the transmission of the electric field lines, thereby improving the touch sensitivity.

In some embodiments of the present invention, the receiving electrode and the driving electrode are disposed on different layers, respectively. Fig. 6 isbase:Sub>A partial cross-sectional view of the touch substrate shown in fig. 1, whereinbase:Sub>A section line is shown asbase:Sub>A-base:Sub>A, and exemplarily, as shown in fig. 1, fig. 2 and fig. 6, the touch substrate includesbase:Sub>A first conductive layer andbase:Sub>A second conductive layer, the receiving electrode 120 is disposed on the first conductive layer, the driving electrode 130 is disposed on the second conductive layer, andbase:Sub>A first insulating layer 140 is disposed between the first conductive layer and the second conductive layer. Namely, the receiving electrode 120 and the driving electrode 130 are respectively located at different layers, and the layers are insulated and isolated from each other by the first insulating layer 140. Specifically, the plurality of driving electrodes 130 are disposed on the carrier substrate 110 at intervals in parallel, and the driving electrodes 130 extend along the second direction Y. The first insulating layer 140 is formed on the carrier substrate 110 and covers the driving electrode 130. The electrode units 123 of the receiving electrode 120 are arranged at intervals on the first insulating layer 140 along the first direction X.

On the basis of the above embodiment, in order to reduce the thickness of the touch substrate and achieve the lightness and thinness of the touch device, the carrier substrate is provided with a plurality of first grooves extending along the second direction, the driving electrodes are disposed in the first grooves, one side of the insulating layer away from the carrier substrate is provided with a plurality of second grooves extending along the first direction, and the electrode units are disposed in the second grooves. Fig. 7 is a cross-sectional view of another touch substrate provided in the present invention, for example, as shown in fig. 1, fig. 2, and fig. 7, in the above embodiment, a plurality of first grooves 111 extending along the second direction Y are disposed on the carrier substrate 110, the driving electrode 130 is disposed in the first grooves 111, and a side surface of the driving electrode 130 away from the carrier substrate 110 may be flush with a notch of the first grooves 111. The first insulating layer 140 covers the carrier substrate 110, a plurality of second grooves 141 extending along the first direction X are disposed on one side of the first insulating layer 140 away from the carrier substrate 110, the electrode unit 123 is disposed in the second grooves 141, and a surface of one side of the electrode unit 123 away from the driving electrode 130 may be flush with a notch of the second groove 141. The electrode unit 123 and the driving electrode 130 may be formed in the second groove 141 and the first groove 111, respectively, in an inkjet printing manner.

In the same sub-electrode, two adjacent electrode units are electrically connected through a lead, and the electrode units and the lead are arranged on the insulating layer in the same layer. Exemplarily, in the above-described embodiment, as shown in fig. 1, fig. 2, fig. 6, and fig. 7, in the first sub-electrode 121, two adjacent electrode units 123 are electrically connected by the wire L1, in the second sub-electrode 122, two adjacent electrode units 123 are electrically connected by the wire L2, and the electrode units 123 and the wires L1 and L2 are disposed on the same layer on the first insulating layer 140.

Fig. 8 is a top view of another touch substrate according to an embodiment of the invention, as shown in fig. 8, the touch substrate includes a carrier substrate 210, a plurality of receiving electrodes 220, a plurality of driving electrodes 230, and a second insulating layer (not shown in fig. 8).

The receiving electrodes 220 and the driving electrodes 230 are disposed on the carrier substrate 210, and the receiving electrodes 220, the driving electrodes 230, and the receiving electrodes 220 and the driving electrodes 230 are insulated from each other. The receiving electrode 220 extends along a first direction X, the driving electrode 230 extends along a second direction Y which is staggered with the first direction X, the vertical projections of the receiving electrode 220 and the driving electrode 230 in the plane of the carrier substrate 210 are mutually staggered, and the receiving electrode 220 and the driving electrode 230 are insulated and isolated at the staggered position.

The receiving electrode comprises at least two sub-electrodes, and the sub-electrodes comprise electrode units arranged at intervals along a first direction. All the electrode units in the same sub-electrode are electrically connected, and the electrode units of different sub-electrodes are alternately arranged. Fig. 9 is a schematic structural diagram of another sub-electrode in the embodiment of the present invention, and for example, as shown in fig. 8 and 9, the receiving electrode 220 includes two sub-electrodes, which are a first sub-electrode 221 and a second sub-electrode 222, respectively, and each of the first sub-electrode 221 and the second sub-electrode 222 includes electrode units 223 arranged at intervals along the first direction X. The electrode units in the same sub-electrode are electrically connected, and for example, as shown in fig. 9, two adjacent electrode units 223 in the first sub-electrode 221 are electrically connected by a conducting wire L1, and two adjacent electrode units 223 in the second sub-electrode 222 are electrically connected by a conducting wire L2. The electrode units of the different sub-electrodes are arranged at intervals, and for example, as shown in fig. 9, in the receiving electrode 220, the electrode units 223 of the first sub-electrode 221 and the electrode units 223 of the second sub-electrode 222 are alternately arranged.

In the embodiment of the invention, the touch substrate can apply the same excitation signal to at least two driving electrodes simultaneously in the working process, and specifically, the number of the driving electrodes simultaneously applied with the same excitation signal is equal to the number of the sub-electrodes in the receiving electrode. Fig. 10 is a schematic diagram illustrating the operation of the touch substrate shown in fig. 8 according to the embodiment of the present invention, and the touch driving method of the present invention is described below with the touch substrate shown in fig. 8 as an example.

For example, as shown in fig. 10, the touch substrate includes 8 receiving electrodes 220 and 6 driving electrodes 230, each receiving electrode 220 includes 2 sub-electrodes, each sub-electrode is a receiving channel, there are 16 receiving channels, which are respectively receiving channels RX1 to RX16, and each receiving electrode corresponds to an even channel and an odd channel. The 6 driving electrodes 230 are 6 input channels, namely input channels TX1-TX6. In the application process, each driving can simultaneously input the same excitation signal to 2 input channels, as shown in fig. 10, the input channels TX1 and TX2 are connected in parallel for simultaneously inputting the same excitation signal, the input channels TX3 and TX4 are connected in parallel for simultaneously inputting the same excitation signal, and the input channels TX5 and TX6 are connected in parallel for simultaneously inputting the same excitation signal. In each driving, the 16 receiving channels RX1-RX16 simultaneously receive sensing signals, the sensing signals received by the row electrode unit 223 sensed by the input channel TX1 are stored in the odd rows of the sensing data array via the odd channels, and the sensing signals received by the row electrode unit 223 sensed by the input channel TX2 are stored in the even rows of the sensing data array via the even channels. Therefore, only 3 times of scanning are needed to complete scanning of one frame of data, the scanning times are reduced by half compared with the scanning times of the touch substrate in the prior art, the scanning speed is doubled, the point reporting speed is further improved, and the touch delay is reduced.

It should be noted that, in the above embodiments, an example is given in which one receiving electrode includes 2 sub-electrodes, and the same excitation signal is simultaneously input to 2 input channels for each driving, so as to exemplarily describe the embodiments of the present invention. In other embodiments of the present invention, one receiving electrode includes more than 2 sub-electrodes, and the same excitation signal is input to more than 2 input channels at the same time for each driving, which can also reduce the scanning times and reduce the touch delay, and thus, the embodiments of the present invention are not described herein again. Since the electrode units of different sub-electrodes are alternately arranged and two adjacent electrode units in the sub-electrodes are electrically connected through the conducting wire, when the same excitation signal is input to at least two input channels at the same time, the excitation signal cannot be simultaneously applied to the driving electrode which generates induction with the electrode unit in the same sub-electrode, for example, in fig. 4 and 10, any two of the input channels TX1, TX3, and TX5 cannot be simultaneously driven, and any two of the input channels TX2, TX4, and TX6 cannot be simultaneously driven.

In some embodiments of the invention, the receive electrodes and the drive electrodes may be in the same layer. Fig. 11 is a partial cross-sectional view of the touch substrate shown in fig. 8, wherein a section line is shown as B-B, and exemplarily, as shown in fig. 8, 9 and 11, the touch substrate includes a third conductive layer and a fourth conductive layer, and a second insulating layer 240 is disposed between the third conductive layer and the fourth conductive layer. The receiving electrode 220 is disposed on the third conductive layer. The electrode unit 223 includes a first electrode piece 2231, a second electrode piece 2232, and a connecting part 2233, and the first electrode piece 2231 and the second electrode piece 2232 are electrically connected by the connecting part 2233.

The driving electrode 230 includes a plurality of third electrode blocks 231 arranged in the second direction Y and a plurality of conductive bridges 232. The third electrode block 231 is disposed on the third conductive layer, the third electrode block 231 is isolated from the electrode unit 223 in an insulating manner, and the conductive bridge 232 is disposed on the fourth conductive layer. The vertical projections of the conductive bridge 232 and the connecting portion 2233 in the plane of the carrier substrate 210 are staggered to form a capacitance node, and two adjacent third electrode blocks 231 are electrically connected through the conductive bridge 232.

On the basis of the above embodiment, in order to reduce the thickness of the touch substrate, the carrier substrate is provided with a plurality of third grooves extending along the second direction, and the conductive bridge is disposed in the third grooves. One side of the insulating layer, which is far away from the carrier substrate, is provided with a plurality of fourth grooves arranged along the first direction and a plurality of fifth grooves arranged along the second direction, the first electrode block and the second electrode block are respectively arranged in the corresponding fourth grooves, and the third electrode block is arranged in the fifth grooves. Fig. 12 is a cross-sectional view of another touch substrate according to an embodiment of the disclosure, for example, as shown in fig. 8, 9 and 12, a plurality of third grooves 211 extending along the second direction Y are disposed on the carrier substrate 210, the conductive bridge 232 is disposed in the third grooves 211, and a side surface of the conductive bridge 232 away from the carrier substrate 210 may be flush with a notch of the third grooves 211. The second insulating layer 240 is disposed on the carrier substrate 210 and covers the conductive bridge 232. One side of the second insulating layer 240, which is far away from the carrier substrate 210, is provided with a plurality of fourth grooves arranged along the first direction X and a plurality of fifth grooves 241 arranged along the second direction Y, the first electrode block 2231 and the second electrode block 2232 are respectively arranged in the corresponding fourth grooves, and the third electrode block 231 is arranged in the fifth grooves 241. The surfaces of the first and second electrode blocks 2231 and 2232 on the sides away from the carrier substrate 210 may be flush with the notches of the fourth groove, and the surface of the third electrode block 231 on the side away from the carrier substrate 210 may be flush with the notches of the fifth groove 241.

Specifically, as shown in fig. 11 and 12, the second insulating layer 240 is provided with a plurality of through holes penetrating through the second insulating layer 240, the third electrode block 231 includes an extension portion 2311 extending into the through holes, and the third electrode block 231 is electrically connected to the conductive bridge 232 through the extension portion 2311.

In some embodiments of the present invention, as shown in fig. 9, in the electrode unit 223, the first electrode block 2231 and the second electrode block 2232 are two isosceles triangles whose vertexes are opposite, and the center lines of the bottom sides of the first electrode block 2231 and the second electrode block 2232 are coincident and parallel to the first direction X, and the opposite vertexes are connected by the connection part 2233. As shown in fig. 8, the third electrode block 231 has a prismatic shape.

In the same sub-electrode, two adjacent electrode units are electrically connected through a lead, and the electrode units and the lead are arranged on the insulating layer in the same layer. Exemplarily, in the above-described embodiment, as shown in fig. 8, 9, 11, and 12, in the first sub-electrode 221, two adjacent electrode units 223 are electrically connected by the conductive line L1, in the second sub-electrode 222, two adjacent electrode units 223 are electrically connected by the conductive line L2, and the electrode units 223 and the conductive line are disposed on the same layer on the second insulating layer 240.

The embodiment of the invention also provides an identification method of the touch input equipment, and based on the touch substrate provided by the embodiment of the invention, the identification speed can be improved. The method comprises the following steps:

Specifically, the following describes a method for recognizing a touch input device, taking the touch substrate shown in fig. 8 as an example.

Fig. 13 is an identification schematic diagram of a multi-touch input device according to an embodiment of the present invention, as shown in fig. 13, in an application process, different excitation signals may be simultaneously input to 2 input channels each time driving is performed, for example, the input channels TX1 and TX2 respectively input excitation signals 1 and excitation signals 2 with different frequencies, 16 receiving channels RX1 to RX16 simultaneously receive sensing signals, a row electrode unit 223 sensed by the input channel TX1 receives a sensing signal and stores the sensing signal in an odd row of the sensing data array 1 via an odd channel, and a row electrode unit 223 sensed by the input channel TX2 receives a sensing signal and stores the sensing signal in an even row of the sensing data array 2 via an even channel. Then, the input channels TX1 and TX2 input the excitation signal 2 and the excitation signal 1 with different frequencies, respectively, the 16 receiving channels RX1 to RX16 receive the sensing signals simultaneously, the row electrode unit 223 sensed with the input channel TX1 receives the sensing signal and stores the sensing signal into the odd row of the sensing data array 2 via the odd channel, and the row electrode unit 223 sensed with the input channel TX2 receives the sensing signal and stores the sensing signal into the even row of the sensing data array 1 via the even channel. And so on, the driving of the input channels TX3 and TX4 and the driving of the input channels TX5 and TX6 are completed in turn. Each frequency of excitation signal is associated with a type of touch input device (e.g., a stylus) that is responsive only to the associated frequency of excitation signal. Therefore, only 6 scans are needed in identifying the touch input device.

In the prior art, to identify a touch input device, input channels TX1 to TX6 need to be scanned sequentially by using an excitation signal 1, and then input channels TX1 to TX6 need to be scanned sequentially by using an excitation signal 2, which requires 12 times in total. Therefore, the touch substrate provided by the embodiment of the invention can improve the recognition speed of the touch input equipment.

An embodiment of the present invention further provides a touch device, including the touch substrate provided in any of the above embodiments of the present invention, where the touch device may be an electronic device such as a touch pad, a smart phone, or a smart tablet, and the present invention is not limited herein.

Fig. 14 is a schematic structural diagram of a touch device according to an embodiment of the present invention, and as shown in fig. 14, the touch device includes a touch substrate 100, a driver 200, a receiver 300, and a controller 400.

The specific structure of the touch substrate 100 has been described in detail in the foregoing embodiments, and the embodiments of the present invention are not described herein again. The controller 400 is connected to the driver 200 and the receiver 300, respectively, the driver 200 is connected to the driving electrodes, and the receiver 300 is connected to the sub-electrodes of the receiving electrodes.

The controller 400 controls the driver 200 to simultaneously apply the same excitation signal to at least two driving electrodes to which no overdrive signal is applied, wherein the number of driving electrodes to which the excitation signal is simultaneously applied is equal to the number of sub-electrodes in one receiving electrode.

The control driver 200 then repeats the above steps until all of the drive electrodes are applied with overdrive signals.

The receiver 300 receives the sensing signals of the respective sub-electrodes when the driver 200 applies the excitation signal, and transmits the sensing signals to the controller 400.

The controller 400 is configured to calculate a position of the touch point according to the sensing signal.

Specifically, the touch driving process of the touch device has been described in detail in the foregoing embodiments, and the embodiments of the present invention are not described herein again.

An embodiment of the present invention further provides another touch device, including the touch substrate provided in any of the above embodiments of the present invention, where the touch device may be an electronic device such as a touch pad, a smart phone, or a smart tablet, and the present invention is not limited herein. The structure of the touch device can refer to fig. 14 of the present invention, and includes a touch substrate 100, a driver 200, a receiver 300, and a controller 400.

The specific structure of the touch substrate 100 has been described in detail in the foregoing embodiments, and the embodiments of the invention are not described herein again. The controller 400 is connected to the driver 200 and the receiver 300, respectively, the driver 200 is connected to the driving electrodes, and the receiver 300 is connected to the sub-electrodes of the receiving electrodes.

The controller 400 controls the driver 200 to simultaneously apply the excitation signals to at least two driving electrodes to which the excitation signals are not applied, wherein the number of the driving electrodes to which the excitation signals are simultaneously applied is equal to the number of the sub-electrodes in one receiving electrode, and the excitation signals applied to the driving electrodes have different frequencies.

Next, the controller 400 controls the driver 200 to exchange the applied excitation signals of at least two driving electrodes such that the frequency of the applied excitation signal of each driving electrode is different from the frequency of the previous applied excitation signal.

Then, the controller 400 controls the driver 200 to repeat the above steps until each of the at least two driving electrodes is applied with the excitation signal of each frequency once.

The controller 400 determines the operating frequency of the touch input device based on the response of the touch input device to excitation signals of different frequencies.

Specifically, the identification method of the touch input device of the touch device has been described in detail in the foregoing embodiments, and the embodiments of the present invention are not described herein again.

In the description herein, it is to be understood that the terms "upper", "lower", "left", "right", and the like are used in a descriptive sense or positional relationship based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive other specific embodiments of the present invention without inventive efforts, which shall fall within the scope of the present invention.

Claims

A touch substrate, comprising:

a carrier substrate;

the receiving electrodes extend along a first direction, the driving electrodes extend along a second direction, the receiving electrodes are not in contact with the driving electrodes, and vertical projections on the carrier substrate are mutually staggered;

the receiving electrode comprises at least two sub-electrodes, and the sub-electrodes comprise electrode units arranged at intervals along the first direction;

and all the electrode units in the same sub-electrode are electrically connected, and the electrode units of different sub-electrodes are alternately arranged.
The touch substrate of claim 1, wherein the touch substrate comprises a first conductive layer and a second conductive layer, the receiving electrode is located on the first conductive layer, the driving electrode is located on the second conductive layer, and an insulating layer is disposed between the first conductive layer and the second conductive layer.
The touch substrate of claim 2, wherein the carrier substrate has a plurality of first grooves extending along the second direction, the driving electrodes are disposed in the first grooves, a plurality of second grooves extending along the first direction are disposed on a side of the insulating layer away from the carrier substrate, and the electrode units are disposed in the second grooves.
The touch substrate of claim 2 or 3, wherein the electrode units are block-shaped grids, and the driving electrodes are strip-shaped grids.
The touch substrate according to claim 1, wherein the touch substrate comprises a third conductive layer and a fourth conductive layer, and an insulating layer is disposed between the third conductive layer and the fourth conductive layer;

the receiving electrode is arranged on the third conducting layer;

the electrode unit comprises a first electrode block, a second electrode block and a connecting part, and the first electrode block and the second electrode block are electrically connected through the connecting part;

the driving electrode comprises a plurality of third electrode blocks arranged along the second direction and a plurality of conductive bridging bridges;

the third electrode block is arranged on the third conducting layer, the third electrode block is insulated and isolated from the electrode unit, and the conducting bridge is arranged on the fourth conducting layer;

the vertical projections of the conductive bridge and the connecting part in the plane of the carrier substrate are mutually staggered, and two adjacent third electrode blocks are electrically connected through the conductive bridge.
The touch substrate of claim 5, wherein the insulating layer defines a plurality of through holes extending through the insulating layer, the third electrode block includes an extension extending into the through holes, and the third electrode block is electrically connected to the conductive bridge via the extension.
The touch substrate of claim 5 or 6, wherein the carrier substrate is provided with a plurality of third grooves extending along the second direction, and the conductive bridge is disposed in the third grooves;

one side of the insulating layer, which is far away from the carrier substrate, is provided with a plurality of fourth grooves arranged along the first direction and a plurality of fifth grooves arranged along the second direction, the first electrode block and the second electrode block are respectively arranged in the corresponding fourth grooves, and the third electrode block is arranged in the fifth grooves.
The touch substrate of claim 5 or 6, wherein in the electrode unit, the first electrode block and the second electrode block are two isosceles triangles with opposite vertexes, and the central lines of the bases of the first electrode block and the second electrode block are coincident and parallel to the first direction.
The touch substrate of claim 2, 3, 5, or 6, wherein in the same sub-electrode, two adjacent electrode units are electrically connected by a wire, and the electrode units and the wire are disposed on the insulating layer in the same layer.
The touch substrate of any one of claims 1-3, 5, and 6, wherein the receiving electrode comprises two sub-electrodes.
A touch driving method, based on the touch substrate of any one of claims 1 to 10, comprising:

simultaneously applying the same excitation signal to at least two drive electrodes which are not applied with the overdrive signals, wherein the number of the drive electrodes simultaneously applied with the excitation signals is equal to the number of the sub-electrodes in one receiving electrode;

simultaneously receiving the sensing signals of the sub-electrodes;

the above steps are repeated until all the drive electrodes are applied with an overdrive signal.
A method for identifying a touch input device, the touch substrate according to any one of claims 1 to 10, comprising:

simultaneously applying excitation signals to at least two drive electrodes to which the overdrive signals are not applied, wherein the number of the drive electrodes to which the excitation signals are simultaneously applied is equal to the number of the sub-electrodes in one receiving electrode, and the applied excitation signals of the drive electrodes have different frequencies;

exchanging the applied excitation signals of the at least two driving electrodes so that the frequency of the applied excitation signal of each driving electrode is different from the frequency of the previous applied excitation signal;

repeating the steps until each driving electrode of the at least two driving electrodes is applied with an excitation signal with each frequency once;

repeating the steps until all the driving electrodes are applied with overdrive signals;

the operating frequency of the touch input device is determined based on the response of the touch input device to the excitation signal at each frequency.
A touch device comprising the touch substrate according to any one of claims 1 to 10, further comprising a driver, a receiver, and a controller;

the controller is respectively connected with the driver and the receiver, the driver is connected with the driving electrode, and the receiver is connected with the sub-electrode of the receiving electrode;

the controller is used for controlling the driver to simultaneously apply the same excitation signal to at least two drive electrodes which are not applied with the excitation signal, wherein the number of the drive electrodes simultaneously applied with the excitation signal is equal to the number of the sub-electrodes in one receiving electrode;

the controller is used for controlling the driver to repeat the steps until all the driving electrodes are applied with overdrive signals;

the receiver is used for receiving the sensing signals of the sub-electrodes when the driver applies the excitation signals and sending the sensing signals to the controller;

the controller is used for calculating the position of the touch point according to the sensing signal.
A touch device comprising the touch substrate according to any one of claims 1 to 10, further comprising a driver, a receiver, and a controller;

the controller is respectively connected with the driver and the receiver, the driver is connected with the driving electrode, and the receiver is connected with the sub-electrode of the receiving electrode;

the controller is used for controlling the driver to simultaneously apply the excitation signals to at least two drive electrodes which are not applied with the excitation signals, wherein the number of the drive electrodes simultaneously applied with the excitation signals is equal to the number of the sub-electrodes in one receiving electrode, and the applied excitation signals of the drive electrodes have different frequencies;

the controller is used for controlling the driver to exchange the applied excitation signals of the at least two driving electrodes, so that the frequency of the applied excitation signal of each driving electrode is different from that of the previous applied excitation signal;

the controller is used for controlling the driver to repeat the steps until each driving electrode of the at least two driving electrodes is applied with an excitation signal with each frequency once;

the receiver is used for receiving the sensing signals of the sub-electrodes when the driver applies the excitation signals and sending the sensing signals to the controller;

the controller is configured to determine an operating frequency of the touch input device based on a response of the touch input device to excitation signals of different frequencies.