CN111796724A - Capacitive touch module, control method thereof and related equipment - Google Patents
Capacitive touch module, control method thereof and related equipment Download PDFInfo
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- CN111796724A CN111796724A CN202010823825.9A CN202010823825A CN111796724A CN 111796724 A CN111796724 A CN 111796724A CN 202010823825 A CN202010823825 A CN 202010823825A CN 111796724 A CN111796724 A CN 111796724A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
Abstract
The invention relates to a capacitive touch module, a control method thereof and related equipment.A switch module is added between a touch chip and a touch array of the touch module, so that the connection state between each touch induction channel in the touch array and the touch chip can be adjusted, and the number of channels communicated with the touch chip at the same time can be matched with the supporting capacity of the touch chip, therefore, touch display screens with different sizes can be adapted to chips with different supporting capacities, the requirement on the capacity of the chip is greatly reduced, and meanwhile, for the touch module, more channels can be arranged to improve the touch sensitivity and further improve the touch performance.
Description
Technical Field
The present invention relates to the field of touch technologies, and in particular, to a capacitive touch module, a control method thereof, and a related device.
Background
In order to implement capacitive touch control in a conventional capacitive touch panel, as shown in fig. 1, in a touch module 100, a film is generally attached between an LCD (not shown) and a panel glass (not shown), and metal lines are densely distributed on the film by etching, and overlapped portions between the metal lines are insulated by a chemical method, so as to implement criss-cross grid lines, which are distributed in an AA area 4 (a non-AA area 5 is shown in the figure) of the touch module, as shown in fig. 1, the grid lines are a touch array 1 implementing touch sensing, each grid line is also called a channel, a row channel is formed in a horizontal direction, and a column channel is formed in a vertical direction. The touch array can be generally connected to a touch chip 3 through a flexible printed circuit 2, when a touch event occurs at any position on the touch screen, a channel at a touch position generates a touch signal, and the touch chip acquires the touch signal in each channel and determines coordinates of a touch point where the touch event occurs through calculation. However, the maximum number of channels that can be supported by the touch chip is generally limited, and therefore, the number of channels of the touch module generally needs to be matched with the maximum number of channels supported by the touch chip. For a small screen, the number of channels that can be supported by the touch chip can completely meet the requirement. However, for a large screen, especially for a screen with an ultra-large size, if the chip capability is adapted, the touch array is still manufactured by using the maximum number of channels that can be supported by the chip, and due to the insufficient number of channels, the touch effect is reduced, and the performance of the capacitive touch system is greatly reduced, so that the user requirements cannot be met. For the chip, if the number of channels to be supported is increased, not only the area and size of the chip are increased, but also the hardware cost is very high, which is also a challenge for the light and thin display screen. However, the oversized display screen has wide application in the commercial screen market, so how to make the touch display screens with different sizes better fit with different touch chips is a problem to be solved urgently.
Disclosure of Invention
Based on the above current situation, the main objective of the present invention is to provide a capacitive touch module, a control method thereof and related devices, which can enable touch display screens with different sizes, especially touch display screens with oversized sizes, to be adapted to different touch chips, so as to obtain better touch effect.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a capacitive touch module comprises a touch panel, a touch control module and a touch array arranged below the touch panel, wherein the touch array comprises 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 signals; the device also comprises a switch module and an area detection module;
the area detection module is used for detecting the touch panel to obtain detection data, and the detection data is used for determining a current touch area;
the output end of the area detection module is connected with the input end of the touch control module so as to send the detection data to the touch control module; the touch control module outputs a region control signal according to the detection data;
the switch module is provided with a plurality of touch input ends and a plurality of touch output ends, the touch input ends are connected with the output ends of the M touch induction channels one by one, and the touch output ends are connected with the channel input ends of the touch control module one by one; the switch module further comprises a control end, the control end is connected with the output end of the touch control module to receive the area control signal, the switch module controls N touch sensing channels to be communicated with the touch control module according to the area control signal so as to input N touch signals of the touch sensing channels into the touch control module, wherein M and N are integers, M is larger than N, N touch sensing channels form an effective touch sensing area, and the effective touch sensing area contains the current virtual touch area.
Optionally, the switch module includes a control unit and a plurality of multi-channel analog switches, an input end of each multi-channel analog switch is the touch input end, and an output end of each 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 with the communication control end of the multi-path analog switch, and the control unit outputs a signal to the communication control end according to the area control signal so as to control the on-off state of the multi-path analog switch.
Optionally, the switch module includes a first analog switch array chip and a second analog switch array chip;
the signal input ends of the first analog switch array chip are connected with the output ends of the row channels of the touch array one by one, and the signal output ends are connected with the input ends of the channels of the touch control module one by one;
the signal input ends of the second analog switch array chip are connected with the output ends of the row channels of the touch array one by one, and the signal output ends are connected with the input ends of the channels of the touch control module one by one.
To achieve the above object, the present invention further provides a method for controlling a capacitive touch module, 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 a row channel and a column channel, the row channel and the column channel form M touch sensing channels of the touch array, the touch sensing channels are used for sensing a touch event to generate a touch signal, an output of the area detection module is connected to an input of the touch control module, the switch module has a plurality of touch input terminals and a plurality of touch output terminals, the plurality of touch input terminals are connected to respective output terminals of the M touch sensing channels one by one, 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 comprises a control end, the control end is connected with the output end of the touch control module, and the method comprises the following steps:
the area detection module detects the touch panel to obtain detection data, and the detection data is used for determining a current touch area;
the touch control module analyzes the detection data to determine the current touch area to obtain an area control signal;
the switch module controls N touch sensing channels to be communicated with the touch control module according to the area control signal so as to input the touch signals of the N touch sensing channels into the touch control module, wherein M and N are integers, M is greater than N, N touch sensing channels form an effective touch sensing area, and the effective touch sensing area comprises the current simulated touch area.
Optionally, the analyzing, by the touch control module, the detection data to determine a current quasi-touch area, and obtaining an area control signal includes:
analyzing the detection data to determine the current touch area;
taking the preset subarea in which the current touch area falls as the effective touch induction area;
and generating the area control signal so as to set the touch sensing channel of the effective touch sensing area to be in a communication state.
Optionally, the analyzing, by the touch control module, the detection data to determine a current quasi-touch area, and obtaining an area control signal includes:
analyzing the detection data to determine the current touch area;
defining an area with a preset size as the effective touch sensing area by taking the current touch area as a center;
and generating the area control signal so as to set the touch sensing channel of the effective touch sensing area to be in a communication state.
Optionally, the switch module includes a control unit and a plurality of multi-channel analog switches, and the switch module controls the on-off states of the plurality of multi-channel analog switches through the control unit to control the N touch sensing channels to 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 ends of the first analog switch array chip are connected with the output ends of the row channels of the touch array one by one, and the signal output ends are connected with the input ends of the channels of the touch control module one by one; the signal input ends of the second analog switch array chip are connected with the output ends of the row channels of the touch array one by one, and the signal output ends are connected with the input ends of the channels of the touch control module one by one; the switch module controls the N touch sensing channels to be communicated with the touch control module according to the area control signal, and the switch module comprises:
according to the area control signal, the first analog switch array chip controls H row channels in the touch array to be communicated with the touch control module;
according to the area control signal, the second analog switch array chip controls L row channels in the touch array to be communicated 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 invention further provides a touch display device, which has a capacitive touch screen, wherein the capacitive touch screen has the capacitive touch module.
To achieve the above object, the present invention further provides a storage medium storing a computer program, which when executed, executes the control method of the capacitive touch module.
Has the advantages that:
according to the capacitive touch module provided by the embodiment of the invention, the switch module is additionally arranged between the touch chip and the touch array of the touch module, so that the connection state between each channel in the touch array and the touch chip can be adjusted, and the number of channels communicated with the touch chip at the same time can be matched with the supporting capacity of the touch chip, therefore, touch display screens with different sizes can be adapted to chips with different supporting capacities, the requirement on the capacity of the chip is greatly reduced, meanwhile, for the touch module, more channels can be arranged to improve the touch sensitivity, and the touch performance is further improved.
Other advantages of the present invention will be described in the detailed description, and those skilled in the art will understand the technical features and technical solutions presented in the description.
Drawings
Preferred embodiments according to the present invention will be described below with reference to the accompanying drawings. In the figure:
FIG. 1 is a schematic diagram illustrating a circuit module of a touch module according to the prior art;
fig. 2 is a schematic diagram illustrating a circuit module of a capacitive touch module according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a multi-way analog switch according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a circuit module of a capacitive touch module according to another embodiment of the invention;
FIG. 5 is a schematic flow chart illustrating a touch signal control method according to an embodiment of the invention;
fig. 6 is a schematic view of a touch display device according to an embodiment of the invention.
Detailed Description
In order to describe the technical solutions of the present invention in more detail to facilitate further understanding of the present invention, the following describes specific embodiments of the present invention with reference to the accompanying drawings. It should be understood, however, that all of the illustrative embodiments and descriptions thereof are intended to illustrate the invention and are not to be construed as the only limitations of the invention.
Fig. 2 is a schematic structural diagram of a capacitive touch module according to a first embodiment of the invention. In the present embodiment, the capacitive touch module 200 includes a touch panel, a touch array 201 disposed under the touch panel, a touch control module 202, and a switch module 203. It is understood that the touch panel may be formed by conventional components of a conventional capacitive touch module, such as a transparent glass component, which is not limited in the present invention and is not shown in the drawings. As shown in fig. 2, a touch array 201 is disposed under the touch panel, and the touch array 201 is formed in the AA area 205 and includes row channels 2012 distributed laterally and column channels 2011 distributed longitudinally. The row channels 2012 and the column channels 2011 form M touch sense channels of the touch array, where M is an integer, and the touch sense channels are used for sensing a touch event to generate a touch signal. Each row and each column in the touch array 201 are supplied with a voltage through a power source, so that when a touch event occurs at any position, an electrical signal change occurs on a row channel 2012 and a column channel 2011 near the position, and a touch signal is generated by a touch sensing channel. 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, and the larger the panel size is, the more the number of touch sensing channels is generally required to meet certain requirements for touch detection speed and sensitivity. In this embodiment, the touch input ends of the switch module 203 are connected to the output ends of the M touch sensing channels in the touch array 201 one by one, and the touch output ends of the other end are connected to the channel input ends of the touch control module 202. The switch module 203 can control on/off of each touch sensing channel through different analog switches to control which 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.
It can be understood that, assuming that the number of the touch sensing channels actually controlled and connected by the switch module 203 is N, the maximum number of the channels that can be supported by the touch control module 202, i.e. the number of the channel input ends, is P, N, P, is an integer, for the switch module 203, the number of the touch input ends thereof needs to be greater than or equal to M, and the number of the touch output ends thereof cannot be greater than P, and in this embodiment, the number of the touch input ends of the switch module 203 is certainly greater than the number of the touch output ends, and further, the number N of the touch sensing channels actually controlled and connected by the switch module 203 is smaller than the number of the input touch sensing channels, i.e. the total number M of the touch sensing channels of. 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 to 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, but disconnects other touch sensing channels, and the touch sensing channels in the connected state are connected to the touch control module 202, so that the touch control module 202 can receive touch signals on the touch sensing channels.
In this embodiment, as shown in fig. 2, the capacitive touch module 200 further includes an area detection module 204 for detecting the touch panel to obtain detection data, where the detection data is used to determine the current touch area. 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 an area control signal according to the detection data, where 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 end, the control end is connected to the output end 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 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 acquire the touch signals in the N touch sensing channels, so that the touch area formed by the N touch sensing channels becomes an effective touch sensing area. In this embodiment, the N touch sensing channels form an effective touch sensing area, and the effective touch sensing area includes the current virtual touch area detected by the area detecting module 204.
In the embodiments of the present invention, as mentioned above, M > N, and N is not necessarily greater than the number of input channels of the touch control module 202.
In this embodiment, the touch panel may be divided into a plurality of areas in advance to obtain a plurality of preset areas, the detection data, such as image data, of the area detection module 204 records a current touch area to be operated by a user, the touch control module 202 may analyze the detection data to obtain the current touch area, and then determine which preset area the area falls into, so as to set a channel of the falling preset area to a connected state, and send an area control signal to the switch module 203, and the switch module 203 may control the on/off of the touch sensing channel according to the area control signal.
The switch module 203 controls the touch sensing channel where the effective touch sensing area is located to be in a connected state according to the area control signal, and at this time, the touch sensing channel where the current virtual touch area is located is necessarily in a connected state, so that the touch control module 202 can acquire the touch signal on the touch sensing channel where the current virtual touch area is located, and further accurately calculate the touch position of the current touch event.
It is understood that the touch control module 202 can 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 and the touch chip in the touch array can be adjusted, and the number of channels communicated with the touch chip at the same time can be matched with the support capability of the touch chip, thereby enabling touch display screens of different sizes to be adapted to chips with different support capabilities, greatly reducing the requirement on the chip capability, and meanwhile, for the touch module, more channels can be arranged without being limited by the support of the number of channels of the chip to improve the touch sensitivity, and further improving the touch performance.
Further, in an embodiment, the area detection module 204 may be a micro camera, which takes a picture of the surface of the touch panel and analyzes the picture to determine the current touch area, for example, the area where the human finger is currently located.
Further, in an embodiment, the area detection module 204 is disposed at any edge of the touch panel, for example, at any of four corners of the touch panel, or at any edge of the four edges, for example, the left long edge is close to the middle. The position of the area detection module 204 is set based on the current touch area of the touch panel, and the present invention is not limited to the specific position.
It is understood that in other embodiments, the area detection module 204 may also be other devices, such as an ultrasonic device, or an infrared transceiver, etc., and the detection of the current touch area can be realized through ultrasonic measurement or infrared measurement.
Further, in an embodiment, the switch module 203 includes a control unit and a plurality of multi-way analog switches, the input ends of the plurality of multi-way analog switches form the touch input end of the switch module 203, the output ends of the plurality of multi-way analog switches form the touch output end of the switch module 203, 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 connection control end of the multi-way analog switches, so as to output a switch control signal to the connection control end according to the received area control signal, control the on-off state of the multi-way analog switches, and further control the on-off state of the touch sensing channel.
For example, referring to fig. 3, a multi-channel analog switch is shown, specifically, a 4-to-2 multi-channel analog switch 401, in a specific implementation scenario, it is assumed that the multi-channel analog switch 401 is adopted, an input end of the multi-channel analog switch 401 is connected to four channels of the touch array 201, for example, four input ends 1, 2, 3, 4 are respectively connected to the channels 1, 2, 3, 4, output ends a, b, c are connected to 3 channel input ends of the touch control module 202, and a control signal output by the control unit is input from the multi-channel analog switch 401 to the control end, so as to determine the connection state of the channels 1, 2, 3, 4. For example, only channels 1, 2, and 3 need to be output in a certain period of time, output ends a, b, and c may be respectively communicated with corresponding input ends, channels 1, 2, and 3 are conducted, and outputs of output ends a, b, and c are outputs of channels 1, 2, and 3, respectively.
It is to be understood that the above multi-way analog switch 401 is only necessary for understanding. In practical implementation, the multi-way analog switch may be other multi-way analog switches, for example, a 1-out-of-multiple analog switch such as a 1-out-of-2 analog switch, a 1-out-of-3 analog switch, or a multi-out-of-multiple analog switch. The number of the control units can be the same as that of the multi-path analog switches, and a plurality of multi-path analog switches can share one control unit. Through using a plurality of different multichannel analog switches, can make the arrangement of switch more nimble, also be more convenient for the maintenance, when breaking down, needn't wholly change.
Further, in an 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 through the form of the array switch, the number of control pins or ports can be further reduced, on-off control of the channel is realized through fewer control ports, the cost is further saved, and the size of the capacitive touch module is reduced.
Further, in an embodiment, the switch module 203 includes two analog switch array chips, one analog switch array chip is used to control on/off of the row channels 2012 in the touch array 201, and one analog switch array is used to control on/off of the column channels 2011 in the touch array 201, as shown in fig. 4, the switch module 203 includes analog switch array chips 2031 and 2032. The signal input ends of the analog switch array chip 2032 are connected to the output ends of the row channels 2012 of the touch array 201 one by one, and the signal output ends are connected to the channel input ends of the touch control module 202 one by one; the signal input terminals of the analog switch array chip 2031 are connected to the output terminals of the row channels 2011 of the touch array 201 one by one, and the signal output terminals are connected to the input terminals of the multiple channels of the touch control module 202 one by one. Therefore, the on-off of the row channel 2012 and the column channel 2011 can be controlled respectively, the independent control of the row channel 2012 and the column channel 2011 is guaranteed, row-column communication errors are avoided, and the error rate is reduced.
Referring to fig. 5, a flowchart illustrating a control method of a touch module according to another embodiment of the invention is shown. It can be understood that the method is applied to the capacitive touch module 200 shown in fig. 2, the capacitive touch module 200 includes a touch panel, a touch control module 202, a touch array 201 disposed under the touch panel, a switch module 203, and an area detection module 204, the touch array 201 includes row channels 2012 and row channels 2011, the row channels 2012 and the row channels 2011 form M touch sensing channels of the touch array 201, and each touch sensing channel is used for detecting a touch event to generate a touch signal. 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, the plurality of touch input ends are connected to the output ends of the M touch sensing channels in the touch array 201 one by one, and the plurality of touch output ends are connected to the plurality of channel input ends of the touch control module 202 one by one. The switch module 203 further includes a control terminal connected to the output terminal of the touch control module 202. In this embodiment, the touch signal control method includes the following steps:
s01, the area detecting module 204 detects the touch panel to obtain detecting data, where the detecting data is used to determine a current touch area;
s02, the touch control module 202 analyzes the detection data to determine the current touch area, and obtains an area control signal;
and S03, the switch module controls the N touch sensing channels to be communicated with the touch control module according to the area control signal so as to input the touch signals of the N touch sensing channels into the touch control module, wherein M and N are integers, M is greater than N, the N touch sensing channels form an effective touch sensing area, and the effective touch sensing area comprises the current virtual touch area.
Specifically, in this embodiment, the area detection module 204 may periodically detect the touch panel to obtain detection data, the detection data may determine a current pseudo-touch area, the area detection module 204 sends the detection data to the touch control module, and the touch control module 202 may obtain the current pseudo-touch area according to the detection data to determine an effective touch sensing area, where the effective touch sensing area includes the current pseudo-touch area. The touch control module 202 outputs an area control signal indicating the on-off state of each touch sensing channel in the touch array 201, and according to the area control signal, the switch module 203 can control the on-off state of each touch sensing channel through the cooperation of 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, thereby inputting the 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 acquire the touch signals in the N touch sensing channels, so that 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 pseudo touch area detected by the area detecting module 204.
In the embodiments of the present invention, M > N, and N is not necessarily greater than the number of input channels of the touch control module 202.
In this embodiment, the number of channels actually controlled by the switch module 203 to be connected is N, and assuming that the maximum number of channels that can be supported by the touch control module 202, that is, the number of channel input ends is P, and P is also an integer, for the switch module 203, the number of touch input ends thereof needs to be greater than or equal to M, and the number of touch output ends thereof cannot be greater than P, and in this embodiment, the number of touch input ends of the switch module 203 is certainly greater than the number of touch output ends, and further, the number of channels actually controlled by the switch module 203 to be connected N is smaller than the number of input channels, that is, the total number of channels of the touch array M. 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, all 600 channels of the touch array 201 are connected to the switch module 203, but the switch module 203 only allows no more than 300 channels to be connected at the same time, but disconnects other channels, and the channels in the connected state are connected to the touch control module 202, so that the touch control module 202 can receive touch signals on the channels.
In this embodiment, the switch module 203 controls the communication state between each touch sensing channel and the touch chip in the touch array, so that the number of channels communicated with the touch chip at the same time can be matched with the support capability of the touch chip, thereby enabling touch display screens of different sizes to be adapted to chips with different support capabilities, greatly reducing the requirement on the chip capability, and meanwhile, for a touch module, more channels can be arranged without being limited by the support of the number of channels of the chip to improve the touch sensitivity, thereby further improving the touch performance.
Further, in an embodiment, step S02 includes:
analyzing the detection data to determine a current touch area;
taking the preset subarea in which the current touch area falls as the effective touch induction area;
and generating the area control signal so as to set the touch sensing channel of the effective touch sensing area to be in a communication state.
In this embodiment, the touch panel may be divided into a plurality of areas in advance to obtain a plurality of preset areas, the detection data, such as image data, of the area detection module 204 records a current touch area to be operated by a user, the touch control module 202 may analyze the detection data to obtain the current touch area, and then determine which preset area the area falls into, so as to set the touch sensing channel of the falling preset area to a connected state, and send an area control signal to the switch module 203, the switch module 203 may control the on/off of the touch sensing channel according to the area control signal, at this time, the falling preset area is an effective touch sensing area.
It can be understood that if the current touch area spans two adjacent preset partitions, a new area can be temporarily defined, including covered portions of the two adjacent preset partitions, and the newly defined area is used as an effective touch sensing area.
Further, in an embodiment, step S02 includes:
analyzing the detection data to determine a current touch area;
defining an area with a preset size as the effective touch sensing area by taking the current touch area as a center;
and generating an area control signal to set the touch sensing channel of the effective touch sensing area to be in a communication state.
In this embodiment, the touch panel may not be partitioned in advance, but the touch control module 202 sets the number of channels acceptable each time, that is, sets the size of the touch sensing area opened each time. After the detection data is obtained each time, the touch control module 202 analyzes the detection data to obtain a current touch area, and then defines an area with a preset size as an effective touch sensing area by taking the area as a center, so that a channel of the preset area can be set to be in a connected state, and an area control signal is sent 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 an embodiment, the area detection module 204 may be a micro camera, and the area detection module 204 detects the current touch area according to an image captured by the micro camera, and analyzes the image by capturing a picture of the surface of the touch panel to determine the current touch area, for example, an area where a human finger is currently located.
Further, in an embodiment, the area detection module 204 is disposed at any edge of the touch panel, for example, at any of four corners of the touch panel, or at any edge of the four edges, for example, the left long edge is close to the middle. The position of the area detection module 204 is set based on the current touch area of the touch panel, and the present invention is not limited to the specific position.
It is understood that in other embodiments, the area detection module 204 may also be other devices, such as an ultrasonic device, or an infrared transceiver, etc., and the detection of the current touch area can be realized through ultrasonic measurement or infrared measurement.
Further, in one embodiment, the switch module 203 includes a control unit and a plurality of multi-way analog switches. The switch module 203 controls the on-off states of the multiple multi-channel analog switches through the control unit to control the N touch sensing channels to be communicated with the touch control module 202. The input end of the multi-path analog switch forms the touch input end of the switch module 203, the output end of the multi-path analog switch forms the touch output 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 with the communication control end of the multi-path analog switch, so that a switch control signal is output to the communication control end according to a received area control signal, the on-off state of the multi-path analog switch is controlled, and the on-off state of the touch sensing channel is controlled.
For example, referring to fig. 3, a multi-channel analog switch is shown, specifically, a 4-to-2 multi-channel analog switch 401, in a specific implementation scenario, it is assumed that the multi-channel analog switch 401 is adopted, an input end of the multi-channel analog switch 401 is connected to four channels of the touch array 201, for example, four input ends 1, 2, 3, 4 are respectively connected to the channels 1, 2, 3, 4, output ends a, b, c are connected to 3 channel input ends of the touch control module 202, and a control signal output by the control unit is input from the multi-channel analog switch 401 to the control end, so as to determine the connection state of the channels 1, 2, 3, 4. For example, only channels 1, 2, and 3 need to be output in a certain period of time, output ends a, b, and c may be respectively communicated with corresponding input ends, channels 1, 2, and 3 are conducted, and outputs of output ends a, b, and c are outputs of channels 1, 2, and 3, respectively.
It is to be understood that the above multi-way analog switch 401 is only necessary for understanding. In practical implementation, the multi-way analog switch may be other multi-way analog switches, for example, a 1-out-of-multiple analog switch such as a 1-out-of-2 analog switch, a 1-out-of-3 analog switch, or a multi-out-of-multiple analog switch. The number of the control units can be the same as that of the multi-path analog switches, and a plurality of multi-path analog switches can share one control unit. Through using a plurality of different multichannel analog switches, can make the arrangement of switch more nimble, also be more convenient for the maintenance, when breaking down, needn't wholly change.
Further, in an 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 through the form of the array switch, the number of control pins or ports can be further reduced, on-off control of the channel is realized through fewer control ports, the cost is further saved, and the size of the capacitive touch module is reduced.
Further, in an embodiment, the switch module 203 includes two analog switch array chips, and as shown in fig. 4, the switch module 203 includes analog switch array chips 2031 and 2032. The signal input ends of the analog switch array chip 2032 are connected to the output ends of the row channels 2012 of the touch array 201 one by one, and the signal output ends are connected to the channel input ends of the touch control module 202 one by one; the signal input terminals of the analog switch array chip 2031 are connected to the output terminals of the row channels 2011 of the touch array 201 one by one, and the signal output terminals are connected to the input terminals of the multiple channels of the touch control module 202 one by one. At this time, step S03 includes:
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;
and S032, according to the area control signal, the second analog switch array chip controls L row channels in the touch array to be communicated with the touch control module.
In this embodiment, H and L are integers, and H + L is equal to N, the analog switch array chip 2032 is a first analog switch array chip, and the analog switch array chip 2031 is a second analog switch array chip. An analog switch array chip is used for controlling the on-off of the row channels 2012 in the touch array 201, and an analog switch array is used for controlling the on-off of the column channels 2011 in the touch array 201, so that the on-off of the row channels 2012 and the column channels 2011 can be controlled respectively, the independent control of the row channels 2012 and the column channels 2011 is ensured, the row-column communication error is avoided, and the error rate is reduced.
Another embodiment of the present invention further provides a capacitive touch screen, which includes the capacitive touch module 200 as described above. Another embodiment of the present invention further provides a touch display device, which includes the capacitive touch screen as described above.
As shown in fig. 6, it can be understood by those skilled in the art that, in addition to the capacitive touch screen, the touch display device 600 further includes other necessary modules of a general touch display device, such as a processor for implementing image and video processing, a power supply module for supplying power, and the like, which are not specifically described and limited in the present invention.
Another embodiment of the present invention further provides a storage medium storing a computer program, wherein the computer program is executed to execute the method for controlling a capacitive touch module.
It will be appreciated by those skilled in the art that the above-described preferred embodiments may be freely combined, superimposed, without conflict.
It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the invention.
Claims (10)
1. A capacitive touch module comprises a touch panel, a touch control module and a touch array arranged below the touch panel, wherein the touch array comprises 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 signals;
the device is characterized by also comprising a switch module and an area detection module;
the area detection module is used for detecting the touch panel to obtain detection data, and the detection data is used for determining a current touch area;
the output end of the area detection module is connected with the input end of the touch control module so as to send the detection data to the touch control module;
the touch control module outputs a region control signal according to the detection data;
the switch module is provided with a plurality of touch input ends and a plurality of touch output ends, the touch input ends are connected with the output ends of the M touch induction channels one by one, and the touch output ends are connected with the channel input ends of the touch control module one by one; the switch module further comprises a control end, the control end is connected with the output end of the touch control module to receive the area control signal, the switch module controls N touch sensing channels to be communicated with the touch control module according to the area control signal so as to input N touch signals of the touch sensing channels into the touch control module, wherein M and N are integers, M is larger than N, N touch sensing channels form an effective touch sensing area, and the effective touch sensing area contains the current virtual touch area.
2. The capacitive touch module of claim 1, wherein the switch module comprises a control unit and a plurality of multi-way analog switches, an input end of each of the multi-way analog switches is the touch input end, and an output end of each of the multi-way analog switches 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 with the communication control end of the multi-path analog switch, and the control unit outputs a signal to the communication control end according to the area control signal so as to control the on-off state of the multi-path analog switch.
3. The capacitive touch module of claim 1, wherein the switch module comprises a first analog switch array chip and a second analog switch array chip;
the signal input ends of the first analog switch array chip are connected with the output ends of the row channels of the touch array one by one, and the signal output ends are connected with the input ends of the channels of the touch control module one by one;
the signal input ends of the second analog switch array chip are connected with the output ends of the row channels of the touch array one by one, and the signal output ends are connected with the input ends of the channels of the touch control module one by one.
4. A control method of a capacitive touch module comprises a touch panel, a touch control module, a touch array arranged below the touch panel, a switch module and an area detection module, wherein the touch array comprises a row channel and a column channel, the row channel and the column channel form M touch sensing channels of the touch array, the touch sensing channels are used for sensing touch events to generate touch signals, the output end of the area detection module is connected with the input end of the touch control module, the switch module is provided with a plurality of touch input ends and a plurality of touch output ends, the plurality of touch input ends are connected with the output ends 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, the switch module further comprises a control end, the control end is connected with the output end of the touch control module, and the method is characterized by comprising the following steps:
the area detection module detects the touch panel to obtain detection data;
the touch control module analyzes the detection data to determine a current touch area to obtain an area control signal;
the switch module controls N touch sensing channels to be communicated with the touch control module according to the area control signal so as to input the touch signals of the N touch sensing channels into the touch control module, wherein M and N are integers, M is greater than N, N touch sensing channels form an effective touch sensing area, and the effective touch sensing area comprises the current simulated touch area.
5. The method as claimed in claim 4, wherein the step of analyzing the detection data by the touch control module to determine a current pseudo-touch area to obtain an area control signal comprises:
analyzing the detection data to determine the current touch area;
taking the preset subarea in which the current touch area falls as the effective touch induction area;
and generating the area control signal so as to set the touch sensing channel of the effective touch sensing area to be in a communication state.
6. The method as claimed in claim 5, wherein the step of analyzing the detection data by the touch control module to determine a current pseudo-touch area to obtain an area control signal comprises:
analyzing the detection data to determine the current touch area;
defining an area with a preset size as the effective touch sensing area by taking the current touch area as a center;
and generating the area control signal so as to set the touch sensing channel of the effective touch sensing area to be in a communication state.
7. The method as claimed in claim 4, wherein the switch module includes a control unit and a plurality of multi-channel analog switches, and the switch module controls the on/off states of the plurality of multi-channel analog switches through the control unit to control the N touch sensing channels to communicate with the touch control module.
8. The method for controlling the 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 ends of the first analog switch array chip are connected with the output ends of the row channels of the touch array one by one, and the signal output ends are connected with the input ends of the channels of the touch control module one by one; the signal input ends of the second analog switch array chip are connected with the output ends of the row channels of the touch array one by one, and the signal output ends are connected with the input ends of the channels of the touch control module one by one; the switch module controls the N touch sensing channels to be communicated with the touch control module according to the area control signal, and the switch module comprises:
according to the area control signal, the first analog switch array chip controls H row channels in the touch array to be communicated with the touch control module;
according to the area control signal, the second analog switch array chip controls L row channels in the touch array to be communicated with the touch control module;
wherein H and L are both integers, and H + L ═ N.
9. A touch display device having a capacitive touch screen, wherein the capacitive touch screen has a capacitive touch module according to any one of claims 1 to 3.
10. A storage medium storing a computer program, wherein the computer program is executed to perform the method for controlling a capacitive touch module according to any one of claims 4 to 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010823825.9A CN111796724A (en) | 2020-08-17 | 2020-08-17 | Capacitive touch module, control method thereof and related equipment |
| PCT/CN2020/141776 WO2022036992A1 (en) | 2020-08-17 | 2020-12-30 | Capacitive touch-control module and control method therefor, and related device |
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| CN202010823825.9A CN111796724A (en) | 2020-08-17 | 2020-08-17 | Capacitive touch module, control method thereof and related equipment |
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| CN202010823825.9A Pending CN111796724A (en) | 2020-08-17 | 2020-08-17 | Capacitive touch module, control method thereof and related equipment |
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| WO2022036992A1 (en) * | 2020-08-17 | 2022-02-24 | 安徽鸿程光电有限公司 | Capacitive touch-control module and control method therefor, and related device |
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