WO2022036992A1 - Capacitive touch-control module and control method therefor, and related device - Google Patents

Abstract

The present application relates to a capacitive touch-control module and a control method therefor, and a related device. A switch module is added between a touch-control chip and a touch-control array of a touch-control module, such that a connection state between each touch-control sensing channel in the touch-control array and the touch-control chip can be adjusted, and the number of channels that are simultaneously in communication with the touch-control chip can match the support capability of the touch-control chip. Therefore, touch-control display screens of different sizes can be adapted to various chips with different support capabilities, and the requirements for the capabilities of the chips are significantly reduced; moreover, for the touch-control module, more channels can also be arranged to improve touch-control sensitivity, thereby further improving touch-control performance.

Description

Capacitive touch module, control method and related equipment

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of Chinese Patent Application No. 202010823825.9 filed on August 17, 2020, entitled "Capacitive Touch Module and Control Method and Related Equipment", the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the field of touch technology, and in particular, to a capacitive touch module, a control method thereof, and related equipment.

Background technique

In the existing capacitive touch screen, in order to realize capacitive touch, as shown in FIG. 1 , in the touch module 100 , it is generally necessary to connect an LCD (not shown in the figure) and a panel glass (not shown in the figure) A layer of film is pasted between them, and the film is etched to form densely distributed horizontal and vertical metal lines, and the overlapping parts between the horizontal and vertical metal lines are chemically insulated to achieve criss-cross grid lines. The lines are distributed in the AA area 4 of the touch module (the non-AA area 5 is shown in the figure), as shown in FIG. 1, these grid lines are the touch array 1 that realizes touch sensing, and each grid line is Called channels, row channels are formed laterally, and column channels are formed longitudinally. The touch array can generally be connected to the touch chip 3 through the flexible circuit board 2. When a touch event occurs anywhere on the touch screen, the channel on the touch position will generate a touch signal, and the touch chip collects each The touch signal on the channel is calculated to determine the coordinates of the touch point where the touch event occurs. However, for the touch chip, the maximum number of channels it can support is generally limited. Therefore, the number of channels of the touch module generally needs to match the maximum number of channels supported by the touch chip. For small screens, the number of channels supported by the touch chip can fully meet the requirements. However, for large screens, especially super-sized screens, in order to adapt to the capability of the chip, the maximum number of channels supported by the chip is still used to make the touch array. Due to the insufficient number of channels, the touch effect will be reduced, and the capacitive touch system will The performance is greatly reduced, which can not meet the needs of users. For the chip, if the number of supported channels is increased, it will not only increase the area and size of the chip, but also consume a lot of hardware costs, which is also a challenge to the thinning of the display screen. However, super-sized display screens are widely used in the business screen market, so how to make touch screens of different sizes better fit with different touch chips is an urgent problem to be solved.

SUMMARY OF THE INVENTION

Based on the above status quo, the main purpose of this application is to provide a capacitive touch module, a control method thereof, and related equipment, which can make touch screens of different sizes, especially super-sized touch screens, adapt to different touch chips , for better touch effect.

To achieve the above object, the technical scheme adopted in the application is as follows:

A capacitive touch module, the capacitive touch module includes a touch panel, a touch control module and a touch array disposed under the touch panel, the touch array includes row channels and column channels, the The row channels and the column channels form M touch sensing channels of the touch array, and the touch sensing channels are used for sensing touch events to generate touch signals;

The capacitive touch module further includes a switch module and an area detection module;

The area detection module is used to detect the touch panel to obtain detection data, and the detection data is used to determine the current to-be-touched area;

The output end of the area detection module is connected with the input end of the touch control module to send the detection data to the touch control module; the touch control module outputs the area according to the detection data control signal;

The switch module has a plurality of touch input terminals and a plurality of touch output terminals, and the plurality of touch input terminals are connected to the output terminals of the M touch sensing channels one by one, and the plurality of touch control channels are connected one by one. The output terminal is connected to the input terminals of the multiple channels of the touch control module one by one; the switch module further includes a control terminal, and the control terminal is connected to the output terminal of the touch control module to receive the area control signal, The switch module controls the N touch sensing channels to communicate with the touch control module according to the regional control signal, so as to input the touch signals of the N touch sensing channels to the touch control module, wherein , M and N are both integers, and M>N, the N touch sensing channels form an effective touch sensing area, and the effective touch sensing area includes the current quasi-touch area.

Optionally, the switch module includes a control unit and a plurality of multi-channel analog switches, the input end of the multi-channel analog switch is the touch input end, and the output end of the multi-channel analog switch is the touch output end The input end of the control unit is the control end of the switch module, the output end of the control unit is connected to the communication control end of the multi-channel analog switch, and the control unit outputs according to the regional control signal The signal is sent to the connection control terminal to control the switch state of the multiplex analog switch.

Optionally, the switch module includes a first analog switch array chip and a second analog switch array chip;

The signal input terminals of the first analog switch array chip are connected one by one with the output terminals of the row channels of the touch control array, and the signal output terminals are connected one by one with a plurality of channel input terminals of the touch control module;

The signal input terminals of the second analog switch array chip are connected one by one with the output terminals of the column channels of the touch array, and the signal output terminals are connected one by one with a plurality of channel input terminals of the touch control module.

In order to achieve the above object, the present application further provides a control method for a capacitive touch module, wherein the capacitive touch module includes a touch panel, a touch control module, a touch array disposed under the touch panel, A switch module and an area detection module, the touch array includes row channels and column channels, the row channels and the column channels form M touch sensing channels of the touch array, and the touch sensing channels are For sensing touch events to generate touch signals, the output end of the area detection module is connected to the input end of the touch control module, and the switch module has a plurality of touch input ends and a plurality of touch output ends , the plurality of touch input terminals are connected to the output terminals of the M touch sensing channels one by one, and the plurality of touch output terminals are connected to the plurality of channel input terminals of the touch control module one by one , the switch module further includes a control terminal, the control terminal is connected to the output terminal of the touch control module, and the method includes:

The area detection module detects the touch panel to obtain detection data, and the detection data is used to determine the current to-be-touched area;

The touch control module analyzes the detection data to determine the current to-be-touched area, and obtains an area control signal;

The switch module controls the N touch sensing channels to communicate with the touch control module according to the regional control signal, so as to input the touch signals of the N touch sensing channels to the touch control module, wherein M and N are both integers, and M>N, the N touch sensing channels form an effective touch sensing area, and the effective touch sensing area includes the current quasi-touch area.

Optionally, the touch control module parses the detection data to determine the current to-be-touched area, and obtains an area control signal, including:

parsing the detection data to determine the current to-be-touched area;

Taking the preset partition into which the current to-be-touched area falls as the effective touch-sensitive area;

The area control signal is generated to set the touch sensing channel of the effective touch sensing area to a connected state.

Optionally, the touch control module parses the detection data to determine the current to-be-touched area, and obtains an area control signal, including:

parsing the detection data to determine the current to-be-touched area;

Taking the current to-be-touched area as the center, an area with a preset size is defined as the effective touch-sensitive area;

The area control signal is generated to set the touch sensing channel of the effective touch sensing area to a connected state.

Optionally, the switch module includes a control unit and a plurality of multi-channel analog switches, and the switch module controls the switch states of the plurality of multi-channel analog switches through the control unit to control the N touch sensing channels communicate with the touch control module.

Optionally, the switch module includes a first analog switch array chip and a second analog switch array chip; the signal input end of the first analog switch array chip is connected to the output end of the touch array row channel one by one, The signal output terminal is connected to the input terminals of the multiple channels of the touch control module one by one; the signal input terminal of the second analog switch array chip is connected to the output terminal of the column channel of the touch control array one by one, and the signal output terminal is connected one by one. The terminal is connected to the input terminals of multiple channels of the touch control module one by one; the switch module controls the N touch sensing channels to communicate with the touch control module according to the regional control signal, including:

According to the area control signal, the first analog switch array chip controls the H row channels in the touch array to communicate with the touch control module;

According to the area control signal, the second analog switch array chip controls the L column channels in the touch array to communicate with the touch control module; wherein H and L are both integers, and H+L=N.

In order to achieve the above object, the present application further provides a touch display device having a capacitive touch screen, and the capacitive touch screen has the above-mentioned capacitive touch module.

In order to achieve the above purpose, the present application further provides a machine-readable storage medium, wherein the machine-readable storage medium stores a computer program, and when the computer program is executed, executes the aforementioned control method for a capacitive touch module .

Beneficial effects:

In the capacitive touch module provided by the embodiments of the present application, by adding a switch module between the touch chip and the touch array of the touch module, the connection state between each channel in the touch array and the touch chip can be adjusted. , so that the number of channels connected to the touch chip at the same time can match the support capacity of the touch chip, so that the touch display screens of different sizes can be adapted to various chips with different support capacities, which greatly requires the chip capacity. At the same time, for the touch module, more channels can be arranged to improve the touch sensitivity and further improve the touch performance.

Other beneficial effects of the present application will be described in the specific embodiments through the introduction of specific technical features and technical solutions. Those skilled in the art should be able to understand the technical features and technical solutions through the introduction of these technical features and technical solutions. beneficial technical effects.

Description of drawings

Preferred embodiments according to the present application will be described below with reference to the accompanying drawings. In the picture:

1 is a schematic diagram of a circuit module composition of a touch module in the prior art;

FIG. 2 is a schematic diagram showing the composition of a circuit module of a capacitive touch module according to an embodiment of the present application;

3 is a schematic diagram of a multi-channel analog switch in an embodiment of the present application;

FIG. 4 is a schematic diagram showing the composition of a circuit module of a capacitive touch module in another embodiment of the present application;

FIG. 5 is a schematic flowchart of a touch signal control method according to an embodiment of the present application;

FIG. 6 is a schematic diagram of a touch display device according to an embodiment of the present application.

detailed description

In order to describe the technical solutions of the present application in more detail and to facilitate further understanding of the present application, the specific embodiments of the present application are described below with reference to the accompanying drawings. However, it should be understood that all the exemplary embodiments and their descriptions are used to explain the present application and do not constitute the only limitation of the present application.

Please refer to FIG. 2 , which is a schematic structural diagram of the capacitive touch module in the first embodiment of the present application. In this embodiment, the capacitive touch module 200 includes a touch panel (not shown in the figure), a touch array 201 disposed under the touch panel, a touch control module 202 and a switch module 203 . It can be understood that the touch panel can use conventional components of the existing capacitive touch module, such as transparent glass components, which are not limited in the present application and are not shown in the drawings. As shown in FIG. 2 , under the touch panel, there are touch arrays 201 staggered in horizontal and vertical directions. The touch array 201 is formed in the AA area 205 and includes row channels 2012 distributed horizontally and column channels 2011 distributed vertically. The row channel 2012 and the column channel 2011 form M touch sensing channels of the touch array, where M is an integer, and the touch sensing channels are used for sensing touch events to generate touch signals. Each row and each column in the touch array 201 is supplied with a voltage by a power supply. Therefore, when a touch event occurs at any position, an electrical signal change occurs on the row channel 2012 and the column channel 2011 near the position. The touch sensing channel thus generates a touch signal. For the capacitive touch module 200, the number of channels of the touch array depends on the support capability of the touch control module 202 and the size of the panel. The touch detection speed and sensitivity meet certain requirements. In this embodiment, the plurality of touch input terminals at one end of the switch module 203 are connected to the output terminals of the M touch sensing channels in the touch array 201 one by one, and the plurality of touch output terminals at the other end are connected to the touch control Multiple channel inputs of the module 202 are connected. The switch module 203 can control the on-off of each touch sensing channel through different analog switches, so as to control which specific touch sensing channels in the touch array 201 are communicated with the touch control module 202 , so as to input touch signals to the touch control module 202 . control signal.

It can be understood that, assuming that the number of touch sensing channels actually controlled and connected by the switch module 203 is N, and the maximum number of channels supported by the touch control module 202, that is, the number of channel input terminals is P, and N and P are both integers, then for the switch module For 203, the number of its touch input terminals needs to be greater than or equal to M, and the number of its touch output terminals cannot be greater than P, and, in this embodiment, the number of touch input terminals of the switch module 203 must be greater than the number of touch output terminals, Further, the number N of touch sensing channels actually controlled by the switch module 203 is smaller than the number of input touch sensing channels, that is, the total number M of touch sensing channels in the touch array. Assuming that the maximum number of channels supported by the touch control module 202 is 300, and the number of touch sensing channels of the touch array 201 is 600, in this embodiment, the 600 touch sensing channels of the touch array 201 are all connected into the switch module 203, but the switch module 203 only allows no more than 300 touch sensing channels to be connected at the same time, and disconnects other touch sensing channels. connected, so that the touch control module 202 can receive the touch signals on these touch sensing channels.

In this embodiment, as shown in FIG. 2 , the capacitive touch module 200 further includes an area detection module (referred to as a “detection module”) 204 for detecting the touch panel to obtain detection data, detecting The data is used to determine the current area to be touched. The output end of the area detection module 204 is connected to the input end of the touch control module 202 to send the detection data to the touch control module 202, and the touch control module 202 outputs the area control signal according to the detection data, and the area control signal indicates The on-off state of each touch sensing channel in the touch array 201 . Meanwhile, the switch module 203 further includes a control terminal, which is connected to the output terminal of the touch control module 202 to receive the area control signal. The switch module 203 controls the N touch sensing channels to communicate with the touch control module 202 according to the control signal. By inputting the touch signals of the N touch sensing channels into the touch control module 202, the touch control module 202 can collect the touch signals in the N touch sensing channels, and thus, the N touch sensing channels are formed by The touch area becomes the effective touch sensing area. In this embodiment, an effective touch sensing area is formed by the N touch sensing channels, and the effective touch sensing area includes the current quasi-touch area detected by the area detection module 204 .

In each embodiment of the present application, as mentioned above, M>N, and N must not be greater than the number of input channels of the touch control module 202 .

In this embodiment, the touch panel can be divided into multiple regions in advance to obtain multiple preset regions, and the detection data of the region detection module 204, such as image data, records the current intended touch that the user is about to perform. The touch control module 202 can obtain the current to-be-touched area by analyzing the detection data, and then determine which preset area the area falls into, and then set the channel of the preset area that falls into the connected state, and Send a regional control signal to the switch module 203, and the switch module 203 can control the on-off of the touch sensing channel according to the regional control signal.

The switch module 203 controls the touch sensing channel where the effective touch sensing area is located to be in the connected state according to the area control control signal. At this time, the touch sensing channel where the current to-be-touched area is located must be in the connected state. Therefore, the touch control The module 202 can collect the touch signal on the touch sensing channel where the current to-be-touched area is located, so as to further accurately calculate the touch position of the current touch event.

It can be understood that the touch control module 202 may be a separate touch chip.

In this embodiment, a switch module is added between the touch control chip and the touch array, so that the communication state between each touch sensing channel in the touch array and the touch chip can be adjusted, so that the touch chip can communicate with the touch chip at the same time. The number of connected channels can match the support capability of the touch chip, so that touch screens of different sizes can be adapted to various chips with different support capabilities, and the requirements for chip capabilities are greatly reduced. In terms of groups, it is no longer limited by the support of the number of chip channels, and more channels can be arranged to improve the touch sensitivity and further improve the touch performance.

Further, in one embodiment, the area detection module 204 may be a miniature camera, which takes a picture of the surface of the touch panel and analyzes the picture to determine the current area to be touched, for example, the area where a human finger is currently located.

Further, in one embodiment, the area detection module 204 is disposed on any edge of the touch panel, for example, disposed on any one of the four corners of the touch panel, or on any side of the four sides , for example, the left long edge is near the middle. The location setting of the area detection module 204 is based on being able to detect the current pseudo-touch area of the touch panel, and the present application does not limit the setting of the specific location.

It can be understood that in other embodiments, the area detection module 204 can also be other devices, such as ultrasonic devices, or infrared transceivers, etc., and can detect the current to-be-touched area through ultrasonic measurement or infrared measurement.

Further, in an embodiment, the switch module 203 includes a control unit and a plurality of multi-channel analog switches, the input ends of the plurality of multi-channel analog switches constitute the touch input end of the switch module 203, and the outputs of the plurality of multi-channel analog switches constitute the touch input end of the switch module 203. The input end of the control unit is the control end of the switch module, and the output end of the control unit is connected to the communication control end of the multi-channel analog switch, so as to output the switch control signal according to the received regional control signal To the communication control terminal, it controls the switching state of the multi-channel analog switch, and then controls the on-off of the touch-sensing channel.

For example, please refer to FIG. 3, which shows a multi-channel analog switch, specifically, a 4-to-2 multi-channel analog switch 401. In a specific implementation scenario, assuming that the multi-channel analog switch 401 is used, the multi-channel analog switch The input terminal of 401 is connected to the four channels of the touch array 201. For example, the four input terminals 1, 2, 3, and 4 are respectively connected to channels 1, 2, 3, and 4, and the output terminals a, b, and c are connected to the touch For the three channel input terminals of the control module 202, the control signal output by the control unit is input from the connection control terminal of the multi-channel analog switch 401 to determine the connection state of the channels 1, 2, 3, and 4. For example, in a certain period of time, only output channels 1, 2, and 3 are required, then the output terminals a, b, and c can be connected to the corresponding input terminals respectively, the channels 1, 2, and 3 are connected, and the output terminals a, b, and c can be connected. The outputs are the outputs of channels 1, 2, and 3, respectively.

It can be understood that the above multi-channel analog switch 401 is only required for understanding. In actual implementation, the multi-channel analog switch can be other multi-channel analog switches, for example, it can be a multi-select 1, such as 2-select 1, 3-select 1 analog switch, or a multi-select multi-analog switch. The number of control units may be the same as the number of multi-channel analog switches, or multiple multi-channel analog switches may share one control unit. By using a number of different multi-channel analog switches, the arrangement of the switches can be made more flexible and easier to maintain, and when a fault occurs, it is not necessary to replace the whole.

Further, in one embodiment, the switch module 203 may include one or more analog switch array chips. The analog switch array chip can make the size of the switch module 203 smaller, and, in the form of an array switch, the number of control pins or ports can be further reduced, and the on-off control of the channel can be realized through fewer control ports, which further saves costs. And reduce the size of the capacitive touch module.

Further, in an embodiment, the switch module 203 may include two analog switch array chips, one analog switch array chip is used to control the on-off of the row channel 2012 in the touch array 201, and one analog switch array is used to control the touch array For on-off of the column channel 2011 in 201 , as shown in FIG. 4 , the switch module 203 may include analog switch array chips 2031 and 2032 . The signal input terminals of the analog switch array chip 2032 are connected to the output terminals of the row channels 2012 of the touch array 201 one by one, and the signal output terminals are connected to the multiple channel input terminals of the touch control module 202 one by one; The signal input terminals are connected to the output terminals of the column channels 2011 of the touch array 201 one by one, and the signal output terminals are connected to the plurality of channel input terminals of the touch control module 202 one by one. In this way, the on-off of the row channel 2012 and the column channel 2011 can be controlled separately, ensuring the independent control of the row channel 2012 and the column channel 2011, avoiding row-column connection errors and reducing the error rate.

Please refer to FIG. 5 , which is a schematic flowchart of a control method of a touch module according to another embodiment of the present application. It can be understood that the method is applied to the capacitive touch module 200 shown in FIG. 2 , and the capacitive touch module 200 includes a touch panel (not shown in FIG. 2 ), a touch control module 202 , a The touch array 201 , the switch module 203 and the area detection module 204 under the panel. The touch array 201 includes row channels 2012 and column channels 2011 . The row channels 2012 and the column channels 2011 form M touch sensing channels of the touch array 201 . , and each touch sensing channel is used to detect touch events to generate touch signals. The output end of the area detection module 204 is connected to the input end of the touch control module 202 , the switch module 203 has a plurality of touch input ends and a plurality of touch output ends, and the plurality of touch input ends are connected to the touch control module 201 . The output terminals of the M touch sensing channels are connected one by one, and the multiple touch output terminals are connected to the multiple channel input terminals of the touch control module 202 one by one. The switch module 203 may further include a control terminal, and the control terminal is connected to the output terminal of the touch control module 202 . In this embodiment, the control method includes the following steps:

S01, the area detection module 204 detects the touch panel to obtain detection data, and the detection data is used to determine the current to-be-touched area;

S02, the touch control module 202 analyzes the detection data to determine the current to-be-touched area, and obtains an area control signal;

S03, the switch module 203 controls the N touch sensing channels to communicate with the touch control module 202 according to the regional control signal, so as to input the touch signals of the N touch sensing channels to the touch control module 202 , wherein M and N are both integers, and M>N, the N touch sensing channels form an effective touch sensing area, and the effective touch sensing area includes the current quasi-touch area.

Specifically, in this embodiment, the area detection module 204 can periodically detect the touch panel to obtain detection data, the detection data can determine the current area to be touched, and the area detection module 204 sends the detection data to the touch panel. The touch control module 202, the touch control module 202 can obtain the current quasi-touch area according to the detection data, and then determine the effective touch sensing area, and the effective touch sensing area includes the current quasi-touch area. The touch control module 202 outputs a regional control signal, and the regional control signal indicates the on-off state of each touch sensing channel in the touch array 201. According to the regional control signal, the switch module 203 can control each touch through the cooperation of different analog switches. The on-off of the sensing channels is controlled to control which specific touch sensing channels in the touch array 201 are communicated with the touch control module 202 , so as to input touch signals to the touch control module 202 . The switch module 203 controls the N touch sensing channels to communicate with the touch control module 202 according to the area control signal, so as to input the touch signals of the N touch sensing channels into the touch control module 202, and the touch control module 202 can collect the N touch sensing channels. touch signals in each of the touch sensing channels, thus, the touch area formed by the N touch sensing channels becomes an effective touch sensing area. In this embodiment, the effective touch sensing area formed by the N touch sensing channels includes the current to-be-touched area detected by the area detection module 204 .

In each embodiment of the present application, M>N, and N must not be greater than the number of input channels of the touch control module 202 .

In this embodiment, the number of channels actually controlled and connected by the switch module 203 is N. Assuming that the maximum number of channels supported by the touch control module 202, that is, the number of channel input terminals, is P, and P is also an integer, then for the switch module 203, In other words, the number of touch input terminals must be greater than or equal to M, and the number of touch output terminals cannot be greater than P. In addition, in this embodiment, the number of touch input terminals of the switch module 203 must be greater than the number of touch output terminals. Further, , the number N of channels actually controlled by the switch module 203 is smaller than the number of input channels, that is, the total number of channels M of the touch array. Assuming that the maximum number of channels supported by the touch control module 202 is 300, and the number of channels of the touch array 201 is 600, in this embodiment, the 600 channels of the touch array 201 are all connected to the switch module 203, However, the switch module 203 only allows the channels not exceeding 300 to be connected at the same time, and disconnects other channels. The channels in the connected state are connected to the touch control module 202, so that the touch control module 202 can receive touches on these channels. control signal.

In this embodiment, the switch module 203 controls the communication state between each touch sensing channel in the touch array and the touch chip, so that the number of channels connected to the touch chip at the same time can match the support capability of the touch chip As a result, touch display screens of different sizes can be adapted to various chips with different support capabilities, and the requirements for chip capabilities are greatly reduced. At the same time, for the touch module, it is no longer limited by the number of chip channels. Support can also arrange more channels to improve touch sensitivity and further improve touch performance.

Further, in an embodiment, step S02 may include:

parsing the detection data to determine the current to-be-touched area;

Taking the preset partition into which the current to-be-touched area falls as the effective touch-sensitive area;

The area control signal is generated to set the touch sensing channel of the effective touch sensing area to a connected state.

In this embodiment, the touch panel can be divided into multiple regions in advance to obtain multiple preset regions, and the detection data of the region detection module 204, such as image data, records the current intended touch that the user is about to perform. The touch control module 202 analyzes the detection data to obtain the current to-be-touched area, and then determines which preset area the area falls into, and then sets the touch sensing channel of the preset area to be connected. state, and sends an area control signal to the switch module 203, and the switch module 203 can control the on-off of the touch sensing channel according to the area control signal.

It can be understood that if the current to-be-touched area spans two adjacent preset partitions, a new area can be temporarily delineated, including the covered parts of the two adjacent preset partitions, and the new area will be delineated. The area of is used as an effective touch sensing area.

Further, in an embodiment, step S02 may include:

parsing the detection data to determine the current to-be-touched area;

Taking the current to-be-touched area as the center, an area with a preset size is defined as the effective touch-sensitive area;

An area control signal is generated to set the touch sensing channel of the effective touch sensing area to a connected state.

In this embodiment, the touch panel may not be partitioned in advance, but the touch control module 202 sets the number of channels that can be accepted each time, that is, sets the size of the touch sensitive area opened each time. After each detection data is obtained, the touch control module 202 analyzes the detection data to obtain the current to-be-touched area, and then takes the area as the center to define an area of a preset size as an effective touch-sensitive area, and then The channel of the preset area is set to be in a connected state, and sends an area control signal to the switch module 203, and the switch module 203 can control the on-off of the touch sensing channel according to the area control signal.

Further, in one embodiment, the area detection module 204 may be a miniature camera, and the area detection module 204 detects the current to-be-touched area according to the image captured by the miniature camera, takes a picture of the touch panel surface, analyzes the The picture determines the current area to be touched, for example, the area where a human finger is currently located.

Further, in one embodiment, the area detection module 204 is disposed on any edge of the touch panel, for example, disposed on any one of the four corners of the touch panel, or on any side of the four sides , for example, the left long edge is near the middle. The location setting of the area detection module 204 is based on being able to detect the current pseudo-touch area of the touch panel, and the present application does not limit the setting of the specific location.

It can be understood that in other embodiments, the area detection module 204 can also be other devices, such as ultrasonic devices, or infrared transceivers, etc., and can detect the current to-be-touched area through ultrasonic measurement or infrared measurement.

Further, in one embodiment, the switch module 203 includes a control unit and a plurality of multi-channel analog switches. The switch module 203 controls the switch states of the multiple analog switches through the control unit to control the N touch sensing channels to communicate with the touch control module 202 . The input terminals of the multiple analog switches form the touch input terminal of the switch module 203, the output terminals of the multiple analog switches form the touch output terminal of the switch module 203, and the input terminal of the control unit is the control terminal of the switch module. The output end of the control unit is connected to the connection control end of the multi-channel analog switch, so as to output the switch control signal to the connection control end according to the received regional control signal, to control the switch state of the multi-channel analog switch, and then to control the on-off of the touch sensing channel .

For example, please refer to FIG. 3, which shows a multi-channel analog switch, specifically, a 4-to-2 multi-channel analog switch 401. In a specific implementation scenario, assuming that the multi-channel analog switch 401 is used, the multi-channel analog switch The input terminal of 401 is connected to the four channels of the touch array 201. For example, the four input terminals 1, 2, 3, and 4 are respectively connected to channels 1, 2, 3, and 4, and the output terminals a, b, and c are connected to the touch For the three channel input terminals of the control module 202, the control signal output by the control unit is input from the connection control terminal of the multi-channel analog switch 401 to determine the connection state of the channels 1, 2, 3, and 4. For example, in a certain period of time, only output channels 1, 2, and 3 are required, then the output terminals a, b, and c can be connected to the corresponding input terminals respectively, the channels 1, 2, and 3 are connected, and the output terminals a, b, and c can be connected. The outputs are the outputs of channels 1, 2, and 3, respectively.

It can be understood that the above multi-channel analog switch 401 is only required for understanding. In practical implementation, the multi-channel analog switch can be other multi-channel analog switches, for example, it can be a multi-select 1 such as 2-select 1, 3-select 1 analog switch, or can be a multi-select multi-analog switch. The number of control units can be the same as the number of multi-channel analog switches, or multiple multi-channel analog switches can share one control unit. By using a number of different multi-channel analog switches, the arrangement of the switches can be made more flexible and easier to maintain, and when a fault occurs, it is not necessary to replace the whole.

Further, in one embodiment, the switch module 203 may include one or more analog switch array chips. The switch module 203 controls the N touch sensing channels to communicate with the touch control module 202 through the one or more analog switch array chips. The analog switch array chip can make the size of the switch module 203 smaller, and, in the form of an array switch, the number of control pins or ports can be further reduced, and the on-off control of the channel can be realized through fewer control ports, which further saves costs. And reduce the size of the capacitive touch module.

Further, in an embodiment, the switch module 203 may include two analog switch array chips. As shown in FIG. 4 , the switch module 203 may include analog switch array chips 2031 and 2032 . The signal input terminals of the analog switch array chip 2032 are connected to the output terminals of the row channels 2012 of the touch array 201 one by one, and the signal output terminals are connected to the multiple channel input terminals of the touch control module 202 one by one; The signal input terminals are connected to the output terminals of the column channels 2011 of the touch array 201 one by one, and the signal output terminals are connected to the plurality of channel input terminals of the touch control module 202 one by one. At this time, step S03 may include:

S031, according to the area control signal, the first analog switch array chip controls H row channels in the touch array to communicate with the touch control module;

S032, according to the area control signal, the second analog switch array chip controls the L column channels in the touch array to communicate with the touch control module.

In this embodiment, H and L are both integers, and H+L=N, the analog switch array chip 2032 is the first analog switch array chip, and the analog switch array chip 2031 is the second analog switch array chip. An analog switch array chip is used to control the on-off of the row channel 2012 in the touch array 201, and an analog switch array is used to control the on-off of the column channel 2011 in the touch array 201, so that the row channel 2012 and the column channel can be controlled respectively. The on-off of 2011 ensures the independent control of the row channel 2012 and the column channel 2011, avoids row-column connection errors, and reduces the error rate.

Another embodiment of the present application further provides a capacitive touch screen, the capacitive touch screen includes the capacitive touch module 200 as described above. Another embodiment of the present application further provides a touch display device, where the touch display device includes the capacitive touch screen as described above.

As shown in FIG. 6 , those skilled in the art can understand that, in addition to the capacitive touch screen 601 including the capacitive touch module 200 as described above, the touch display device 600 also includes other necessary elements of a general touch display device. Modules, such as the processor 602 for implementing image and video processing and the power supply module 603 for power supply, etc., are not specifically described or limited in this application.

Specifically, the processor 602 may include a central processing unit (Central Processing Unit, CPU), or a specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

Another embodiment of the present application further provides a machine-readable storage medium, where the machine-readable storage medium stores a computer program, and when the computer program is executed, executes the aforementioned control method of a capacitive touch module. Examples of machine-readable storage media include non-transitory computer-readable storage media such as electronic circuits, semiconductor memory devices, ROM, random access memory, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disk.

To be clear, the present application is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above-described embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the sequence of steps after comprehending the spirit of the present application.

The functional blocks shown in the above-described structural block diagrams may be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), suitable firmware, a plug-in, a function card, and the like. When implemented in software, elements of the present application are programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine-readable medium or transmitted over a transmission medium or communication link by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transmit information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, Radio Frequency (RF) links, etc. Wait. The code segments may be downloaded via a computer network such as the Internet, an intranet, or the like.

It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above steps, that is, the steps may be performed in the order mentioned in the embodiment, or may be different from the order in the embodiment, or several steps may be performed simultaneously.

Aspects of the present application are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the present application. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine such that execution of the instructions via the processor of the computer or other programmable data processing apparatus enables the Implementation of the functions/acts specified in one or more blocks of the flowchart and/or block diagrams. Such processors may be, but are not limited to, general purpose processors, special purpose processors, application specific processors, or field programmable logic circuits. It will also be understood that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can also be implemented by special purpose hardware for performing the specified functions or actions, or by special purpose hardware and/or A combination of computer instructions is implemented.

Those skilled in the art can understand that, under the premise of no conflict, the above preferred solutions can be freely combined and superimposed.

It should be understood that the above-mentioned embodiments are only exemplary rather than restrictive, and those skilled in the art can make various obvious or equivalent to the above-mentioned details without departing from the basic principles of the present application. Modifications or substitutions will all be included within the scope of the claims of the present application.

Claims (10)

1. A capacitive touch module includes a touch panel, a touch control module and a touch array disposed under the touch panel, the touch array includes row channels and column channels, the row channels and the The column channels form M touch sensing channels of the touch array, and the touch sensing channels are used for sensing touch events to generate touch signals;

   The capacitive touch module further includes a switch module and an area detection module;

   The area detection module is used to detect the touch panel to obtain detection data, and the detection data is used to determine the current to-be-touched area;

   The output end of the area detection module is connected with the input end of the touch control module to send the detection data to the touch control module;

   the touch control module outputs an area control signal according to the detection data;

   The switch module has a plurality of touch input terminals and a plurality of touch output terminals, and the plurality of touch input terminals are connected to the output terminals of the M touch sensing channels one by one, and the plurality of touch control channels are connected one by one. The output terminal is connected to the input terminals of the multiple channels of the touch control module one by one; the switch module further includes a control terminal, and the control terminal is connected to the output terminal of the touch control module to receive the area control signal, The switch module controls the N touch sensing channels to communicate with the touch control module according to the regional control signal, so as to input the touch signals of the N touch sensing channels to the touch control module, wherein , M and N are both integers, and M>N, the N touch sensing channels form an effective touch sensing area, and the effective touch sensing area includes the current quasi-touch area.
2. The capacitive touch module according to claim 1, wherein the switch module comprises a control unit and a plurality of multi-channel analog switches, the input terminals of the multi-channel analog switches are the touch input terminals, and the multi-channel analog switches are the touch input terminals. The output end of the analog switch is the touch output end; the input end of the control unit is the control end of the switch module, and the output end of the control unit is connected to the communication control end of the multi-channel analog switch , the control unit outputs a signal to the communication control terminal according to the area control signal to control the switching state of the multi-channel analog switch.
3. The capacitive touch module according to claim 1, wherein the switch module comprises a first analog switch array chip and a second analog switch array chip;

   The signal input terminals of the first analog switch array chip are connected one by one with the output terminals of the row channels of the touch control array, and the signal output terminals are connected one by one with a plurality of channel input terminals of the touch control module;

   The signal input terminals of the second analog switch array chip are connected one by one with the output terminals of the column channels of the touch array, and the signal output terminals are connected one by one with a plurality of channel input terminals of the touch control module.
4. A control method of a capacitive touch module, wherein the capacitive touch module comprises a touch panel, a touch control module, a touch array disposed under the touch panel, a switch module and an area detection module, wherein the The touch array includes row channels and column channels, the row channels and the column channels form M touch sensing channels of the touch array, and the touch sensing channels are used for sensing touch events to generate touch signal, the output end of the area detection module is connected to the input end of the touch control module, the switch module has a plurality of touch input ends and a plurality of touch output ends, the plurality of touch input ends It is connected with each output end of the M touch sensing channels one by one, the plurality of touch output ends are connected with the plurality of channel input ends of the touch control module one by one, and the switch module further includes a control end , the control terminal is connected to the output terminal of the touch control module, and the method includes:

   the area detection module detects the touch panel to obtain detection data;

   The touch control module analyzes the detection data to determine the current to-be-touched area, and obtains an area control signal;

   The switch module controls the N touch sensing channels to communicate with the touch control module according to the regional control signal, so as to input the touch signals of the N touch sensing channels to the touch control module, wherein M and N are both integers, and M>N, the N touch sensing channels form an effective touch sensing area, and the effective touch sensing area includes the current quasi-touch area.
5. The control method of a capacitive touch module according to claim 4, wherein the touch control module parses the detection data to determine a current to-be-touched area, and obtains an area control signal, comprising:

   parsing the detection data to determine the current to-be-touched area;

   Taking the preset partition into which the current to-be-touched area falls as the effective touch-sensitive area;

   The area control signal is generated to set the touch sensing channel of the effective touch sensing area to a connected state.
6. The control method of a capacitive touch module according to claim 5, wherein the touch control module parses the detection data to determine a current to-be-touched area, and obtains an area control signal, comprising:

   parsing the detection data to determine the current to-be-touched area;

   Taking the current to-be-touched area as the center, an area with a preset size is defined as the effective touch-sensitive area;

   The area control signal is generated to set the touch sensing channel of the effective touch sensing area to a connected state.
7. The control method of a capacitive touch module according to claim 4, wherein the switch module comprises a control unit and a plurality of multi-channel analog switches, and the switch module controls the plurality of multi-channel analog switches through the control unit The switch state of the switch is used to control the N touch sensing channels to communicate with the touch control module.
8. The control method of a capacitive touch module according to claim 4, wherein the switch module comprises a first analog switch array chip and a second analog switch array chip; the signal input end of the first analog switch array chip is connected to the The output terminals of the row channels of the touch array are connected one by one, and the signal output terminals are connected to the input terminals of the multiple channels of the touch control module one by one; the signal input terminals of the second analog switch array chip are connected to the touch control module. The output terminals of the column channels of the control array are connected one by one, and the signal output terminals are connected one by one with the input terminals of the multiple channels of the touch control module; the switch module controls the N touch sensors according to the regional control signal. The channel communicating with the touch control module includes:

   According to the area control signal, the first analog switch array chip controls the H row channels in the touch array to communicate with the touch control module;

   According to the area control signal, the second analog switch array chip controls the L column channels in the touch array to communicate with the touch control module;

   Wherein, both H and L are integers, and H+L=N.
9. A touch display device has a capacitive touch screen, and the capacitive touch screen has the capacitive touch module according to any one of claims 1-3.
10. A machine-readable storage medium, wherein the machine-readable storage medium stores a computer program, wherein, when the computer program is executed, the process of the capacitive touch module according to any one of claims 4-8 is executed. Control Method.

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