TWI880465B - Method for detecting touch and touch chip and touch chip and touch device - Google Patents

Abstract

A method for detecting touch and touch chip and touch chip and touch device. The method for detecting touch includes: determining j first zones and k second zones on the touch screen based on the first signal channel during the current detection cycle, with no overlap between the first and second zones; controlling the first signal channel in the first area to transmit the first touch signal, controlling the first signal channel in the second area to transmit the second touch signal, and the first touch signal and the second touch signal are in opposite phase; obtaining a first detection signal from the outputs of the m second signal channels, the first detection signal being used to detect a contact operation in the direction of the second signal channel.

Description

Touch detection method, touch chip and touch device

The present application relates to the field of touch control technology, and more particularly to a touch detection method, a touch control chip and a touch control device.

At present, with the continuous advancement of touch screen technology, most electronic products on the market use touch screens to implement human-computer interaction functions, especially various electronic terminal products, such as mobile phones, tablet computers, notebooks, and e-books. Most of them use capacitive touch screens for human-computer interaction.

The principle of capacitive touch screen is to determine whether there is a touch operation and the location of the touch operation based on the change of capacitance value before and after the touch. In order to improve the accuracy of touch detection in the mainstream detection method, the signal-to-noise ratio of the touch signal needs to be high enough, so a touch signal with a higher amplitude is used. Since the touch screen and the display are superimposed, a parasitic capacitor will be formed between the two. The touch screen will generate a large amount of charge that is coupled to the display through the parasitic capacitor, thereby affecting the display effect of the display.

In view of this, this application provides a touch detection method, a touch chip and a touch device, which are used to reduce the impact of the touch screen on the display effect of the display screen during the touch detection stage. The technical solution of this application is as follows:

In a first aspect, the present application provides a touch detection method, which is applied to a touch screen, wherein the touch screen includes n first signal channels and m second signal channels orthogonal to the first signal channels, wherein the first signal channels and the second signal channels are used to transmit touch signals and complete touch detection, wherein the method includes: determining j first areas and k second areas on the touch screen according to the first signal channels in a current detection cycle, wherein the first areas and the second areas are The second areas do not overlap; the first signal channel in the first area is controlled to transmit a first touch signal, and the first signal channel in the second area is controlled to transmit a second touch signal, and the first touch signal and the second touch signal have opposite phases; m first detection signals output by the second signal channel are obtained, and the first detection signal is used to detect the touch operation in the direction of the second signal channel; wherein n≥2, m≥2, j≥1, k≥1.

In an embodiment of the present application, the method further includes: determining i third areas and h fourth areas on the touch screen according to the second signal channel, wherein the third areas and the fourth areas do not overlap; controlling the second signal channel in the third area to transmit the first touch signal, and controlling the second signal channel in the fourth area to transmit the second touch signal; obtaining n second detection signals output by the first signal channel, wherein the second detection signal is used to detect the touch operation in the direction of the first signal channel, and combined with the first detection signal to obtain the two-dimensional coordinates of the touch operation; wherein i≥1, h≥1.

In one embodiment of the present application, the number of the first signal channels of j first regions is equal to the number of the first signal channels of k second regions, and the voltage amplitude of the first touch signal is equal to the voltage amplitude of the second touch signal; or, the number of the first signal channels of j first regions is greater than the number of the first signal channels of k second regions, and the voltage amplitude of the first touch signal is less than the voltage amplitude of the second touch signal; or, the number of the first signal channels of j first regions is less than the number of the first signal channels of k second regions, and the voltage amplitude of the first touch signal is greater than the voltage amplitude of the second touch signal.

In one embodiment of the present application, determining j first areas and k second areas on the touch screen according to the first signal channel includes: alternately dividing the first areas and the second areas on the touch screen according to an arrangement direction of the first signal channel to determine j first areas and k second areas.

In an embodiment of the present application, j=k, j+k =n, and n is an even number; or, j=k-1 or j=k+1, j+k =n, and n is an odd number.

In one embodiment of the present application, the number of the second signal channels of i third areas is equal to the number of the second signal channels of h fourth areas, and the voltage amplitude of the first touch signal is equal to the voltage amplitude of the second touch signal; or, the number of the second signal channels of i third areas is greater than the number of the second signal channels of h fourth areas, and the voltage amplitude of the first touch signal is less than the voltage amplitude of the second touch signal; or, the number of the second signal channels of i third areas is less than the number of the second signal channels of h fourth areas, and the voltage amplitude of the first touch signal is greater than the voltage amplitude of the second touch signal.

In one embodiment of the present application, determining i third areas and h fourth areas on the touch screen according to the second signal channel includes: alternately dividing the third area and the fourth area on the touch screen according to the arrangement direction of the second signal channel to determine i first areas and h second areas.

In an embodiment of the present application, i=h, i+h =m, and m is an even number; or, i=h-1 or i=h+1, i+h =m, and m is an odd number.

The second aspect of the present application provides a touch chip, which is used to connect to n first signal channels and m second signal channels in a touch screen, wherein the first signal channels and the second signal channels are orthogonal and are used to transmit touch signals and complete touch detection. The touch chip is used to execute the touch detection method.

The cooperative manufacturer of this application provides a touch control device, which includes a display screen and a touch screen, and the touch control device also includes the touch control chip.

In the present application, during the detection period, the touch screen is divided into at least one first area and at least one second area according to the first signal channel, and a first touch signal is transmitted to the first area and a second touch signal is transmitted to the second area. Since the first touch signal and the second touch signal are in opposite phases, the charge generated in the first area and the charge generated in the second area cancel each other out, thereby reducing the amount of charge coupled from the touch screen to the display screen through parasitic capacitance, thereby reducing the impact of the touch screen on the display effect of the display screen when detecting touch.

It should be noted that in the embodiments of the present application, "at least one" means one or more, and "plurality" means two or more than two. "And/or" describes the association relationship of related objects, indicating that three kinds of relationships may exist. For example, A and/or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claim form and drawings of the present application are used to distinguish similar objects, and are not used to describe a specific order or precedence.

It should also be noted that the method disclosed in the embodiment of the present application or the method shown in the flowchart includes one or more steps for implementing the method. Without departing from the scope of the claims, the execution order of the multiple steps can be interchanged with each other, and some of the steps can also be deleted.

At present, with the continuous advancement of touch screen technology, most electronic products on the market use touch screens to implement human-computer interaction functions, especially various electronic terminal products, such as mobile phones, tablet computers, notebooks, and e-books. Most of them use capacitive touch screens for human-computer interaction.

The principle of capacitive touch screen is to determine whether there is a touch operation and the location of the touch operation based on the change of capacitance value before and after the touch. In order to improve the accuracy of touch detection in the mainstream detection method, the signal-to-noise ratio of the touch signal needs to be high enough, so a touch signal with a higher amplitude is used. Since the touch screen and the display are superimposed, the packaging layer between the two will form a parasitic capacitor. Therefore, in the mainstream detection method, the touch screen will generate a large amount of charge coupled to the display through the parasitic capacitor, thereby affecting the display effect of the display.

The present application embodiment provides a touch detection method, a touch chip and a touch device, which are used to reduce the influence of the touch screen on the display effect of the display screen during the touch detection stage.

Please refer to FIG. 1, which is a schematic diagram of the structure of a touch screen provided by an embodiment of the present application. The touch screen 100 includes a plurality of rows of touch electrodes 110 (the example in the figure is 5 rows of touch electrodes 110, each row includes 5 connected diamond-shaped touch electrodes), and a plurality of columns of touch electrodes 120 (the example in the figure is 4 columns of touch electrodes 120, each column includes 6 connected diamond-shaped receiving electrodes). The driving electrodes 110 in each row are insulated and orthogonal to the receiving electrodes 120 in each column. The touch electrodes 110 in each row form a first signal channel TX1-TX5, and the touch electrodes 120 in each column form a second signal channel RX1-RX4, and a node capacitor is formed at the intersection of the first signal channel and the second signal channel.

In some embodiments, when detecting a touch operation on the touch screen 100, a carrier touch signal of a preset frequency may be transmitted through the first signal channel, and the second signal channel receives the detection signal through the node mutual capacitance. When a touch operation occurs at a certain node, the capacitance value of the node will change, thereby causing the detection signal received by the corresponding second signal channel to change, thereby detecting the touch operation and its position on the touch screen 100.

Next, a touch detection method provided by an embodiment of the present application is introduced in conjunction with FIG2. The touch detection method is applied to a touch screen, the touch screen includes n first signal channels, and m second signal channels orthogonal to the first signal channels, the first signal channels and the second signal channels are used to transmit touch signals and complete touch detection, n≥2, m≥2. The touch detection method includes:

Step S21: Determine j first areas and k second areas on the touch screen according to the first signal channel in the current detection cycle, wherein the first areas and the second areas do not overlap, wherein j≥1, k≥1.

In the embodiment of the present application, the touch screen is disposed in a touch device. The touch device includes, for example, a mobile phone, a tablet computer, and a notebook, and the user interacts with the touch device by clicking the touch screen with a finger or a touch pen, or by sliding on the touch screen.

The touch screen or touch device also includes a touch chip, which is used to execute the control logic of touch detection, such as transmitting a touch signal to a signal channel on the touch screen, receiving a detection signal, and completing touch detection according to the detection signal. The detection cycle is a working cycle of the touch chip for touch detection. During the detection cycle, the touch chip can transmit a touch signal to each first signal channel and receive a detection signal from each second signal channel, identify a touch operation according to the detection signal, or generate touch information according to the detection signal and transmit it to the main controller of the touch device.

It can be understood that when the touch chip of the present application enters the current detection cycle, it first divides the touch screen into regions according to the first signal channel to determine j first regions and k second regions on the touch screen. Taking the touch screen 100 shown in FIG1 as an example, the touch chip can divide the first signal channels TX1-TX2 into the first region and the first signal channels TX3-TX5 into the second region, or the touch chip can divide the first signal channels TX1-TX2 into the first region, divide the first signal channels TX3-TX4 into the second region, and divide the first signal channel TX5 into the first region.

Step S22: Control the first signal channel in the first area to transmit a first touch signal, and control the first signal channel in the second area to transmit a second touch signal, wherein the first touch signal and the second touch signal have opposite phases.

In the embodiment of the present application, the touch chip uses the first signal channel as a transmitting channel, that is, the first signal channel is used to transmit the touch signal, and uses the second signal channel as a receiving channel, that is, the second signal channel is used to receive the detection signal through the node mutual capacitance.

After the touch chip determines at least one first region and at least one second region according to the first signal channel, it transmits the first touch signal to the first region and transmits the second touch signal to the second region. It can be understood that since the first touch signal and the second touch signal are in opposite phases, the charge generated by the first region when transmitting the first touch signal can offset the charge generated by the second region when transmitting the second touch signal.

For example, the first touch signal and the second touch signal are sine waves with opposite phases. When the first region is at the peak of the sine wave and the second region is at the trough of the sine wave, a large amount of positive charge is generated in the first region and a large amount of negative charge is generated in the second region. Therefore, the charges generated in the first region and the second region can offset each other, thereby reducing the amount of charge coupled from the touch screen to the display screen through parasitic capacitance.

Step S23: Obtain the first detection signals output by the m second signal channels, where the first detection signals are used to detect the touch operation in the direction of the second signal channel.

In the embodiment of the present application, after the touch chip transmits the first touch signal to the first signal channel of the first area and transmits the second touch signal to the first signal channel of the second area, it will obtain the first detection signal of each second signal channel. For example, the touch chip can simultaneously obtain the first detection signals output by m second signal channels, or scan m second signal channels in a preset order to obtain the first detection signals in sequence.

Among them, since the first touch signal and the second touch signal cancel each other, in the second signal channel where no touch operation occurs, the amplitude of the corresponding first detection signal obtained by the touch chip is small or close to zero. In the second signal channel where the touch operation occurs, the amplitude of the corresponding first detection signal obtained by the touch chip is large, or the amplitude is close to the amplitude of the first touch signal or the amplitude of the second touch signal, and thus the touch operation can be detected. For example, when an operation occurs in the first area, the phase of the corresponding first detection signal obtained by the touch chip is consistent with the first touch signal, and the amplitude is close.

Taking the touch screen 100 shown in FIG1 as an example, the first touch signal or the second touch signal is transmitted in different regions on the first signal channels TX1-TX5, and the first detection signal output by the second signal channels RX1-RX4 is obtained, so that the touch operation in the direction of the second signal channel can be detected, that is, which RX has the touch operation specifically detected.

It can be understood that the embodiment of the present application divides the touch screen into at least one first area and at least one second area according to the first signal channel during the detection period, and transmits the first touch signal to the first area and transmits the second touch signal to the second area. Since the first touch signal and the second touch signal are in opposite phases, the charge generated in the first area and the charge generated in the second area cancel each other out, thereby reducing the amount of charge coupled from the touch screen to the display screen through parasitic capacitance, thereby reducing the impact of the touch screen on the display effect of the display screen when detecting touch.

In the embodiment of the present application, the step of determining j first areas and k second areas on the touch screen according to the first signal channel includes: alternately dividing the first area and the second area on the touch screen according to the arrangement direction of the first signal channel to determine j first areas and k second areas.

Please refer to FIG. 3, which is a schematic diagram of the process of another touch detection method provided by the embodiment of the present application. The touch detection method shown in FIG. 3 includes steps S31-S33, and steps S31-S33 are consistent with steps S21-S23 shown in FIG. 2, and will not be repeated here. The touch detection method shown in FIG. 3 is different from the touch detection method shown in FIG. 2 in that the touch detection method shown in FIG. 3 also includes:

Step S34: determining i third areas and h fourth areas on the touch screen according to the second signal channel, wherein the third areas and the fourth areas do not overlap, wherein i≥1, h≥1.

In the embodiment of the present application, in the current detection cycle, after the touch chip obtains m first detection signals from the second signal channel, it can also use the first signal channel as a receiving channel and the second signal channel as a transmitting channel. That is, the second signal channel is used to transmit the touch signal, and the first signal channel is used to receive the detection signal. In the current detection cycle, the touch chip performs the touch operation detection again.

The touch chip divides the touch screen again according to the second signal channel to determine i third regions and h fourth regions on the touch screen. Taking the touch screen 100 shown in FIG1 as an example, the touch chip can divide the second signal channels RX1-RX2 into the third region and divide the second signal channels RX3-RX4 into the fourth region.

Step S35: Control the second signal channel in the third area to transmit the first touch signal, and control the second signal channel in the fourth area to transmit the second touch signal.

In the embodiment of the present application, after the touch chip determines at least one third region and at least one fourth region according to the second signal channel, it transmits the first touch signal to the third region and transmits the second touch signal to the fourth region. It can be understood that since the first touch signal and the second touch signal are in opposite phases, the charge generated by the third region when transmitting the first touch signal can offset the charge generated by the fourth region when transmitting the second touch signal.

For example, the first touch signal and the second touch signal are sine waves with opposite phases. When the third region is at the peak of the sine wave and the fourth region is at the trough of the sine wave, a large amount of positive charge is generated in the third region and a large amount of negative charge is generated in the fourth region. Therefore, the charges generated in the third region and the fourth region can offset each other, thereby reducing the amount of charge coupled from the touch screen to the display screen through parasitic capacitance.

Step S36: Obtain second detection signals output by n first signal channels, the second detection signals are used to detect the touch operation in the direction of the first signal channel, and are combined with the first detection signals to obtain the two-dimensional coordinates of the touch operation.

In the embodiment of the present application, after the touch chip transmits the first touch signal to the second signal channel of the third area and transmits the second touch signal to the second signal channel of the fourth area, it will obtain the second detection signal of each first signal channel. For example, the touch chip can simultaneously obtain the second detection signals output by n first signal channels, or scan n first signal channels in a preset order and obtain the second detection signals in sequence.

Taking the touch screen 100 shown in FIG1 as an example, the first touch signal or the second touch signal is transmitted in a region on the second signal channel RX1-RX4, and the second detection signal output by the first signal channel TX1-TX5 is obtained, so that the touch operation in the direction of the first signal channel can be detected, that is, which TX has a touch operation, is specifically detected, and then combined with the previously detected RX where a touch operation has occurred, the two-dimensional coordinates of the touch operation are obtained.

It can be understood that the present application uses the second signal channel as the transmitting channel and the first signal channel as the receiving channel again in the detection cycle to perform a second touch detection to obtain a second detection signal. The second detection signal combined with the first detection signal can further improve the accuracy of the touch operation detection. In addition, by dividing the touch screen into at least one third area and at least one fourth area, and transmitting the first touch signal to the third area and the second touch signal to the fourth area, since the first touch signal and the second touch signal have opposite phases, the charge generated in the third area and the charge generated in the fourth area cancel each other out, thereby reducing the amount of charge coupled to the display screen through the parasitic capacitance of the touch screen, thereby reducing the impact of the touch screen on the display effect of the display screen when detecting touch.

In the embodiment of the present application, the step of determining i third areas and h fourth areas on the touch screen according to the second signal channel includes: alternately dividing the third area and the fourth area on the touch screen according to the arrangement direction of the second signal channel to determine i first areas and h second areas.

In some embodiments, the number of the first signal channels of the j first regions is equal to the number of the first signal channels of the k second regions, and the voltage amplitude of the first touch signal is equal to the voltage amplitude of the second touch signal. As shown in FIG4 , the touch chip can divide the touch screen into a first region 410 and a second region 420 according to the first signal channel, and the number of the first signal channels of the first region 410 and the second region 420 is the same. The positive-phase first touch signal is transmitted on the first signal channels TX1-TX4 of the first region 410, and the negative-phase second touch signal is transmitted on the first signal channels TX5-TX8 of the second region 420.

Similarly, when the second signal channel is used as the transmitting channel and the first signal channel is used as the receiving channel again in the detection cycle to perform the second touch detection, in some embodiments, the number of the second signal channels of the i third regions is equal to the number of the second signal channels of the h fourth regions, and the voltage amplitude of the first touch signal is equal to the voltage amplitude of the second touch signal. As shown in FIG5 , the touch chip can divide the touch screen into a third region 510 and a fourth region 520 according to the second signal channel, transmit the positive first touch signal on the second signal channels RX1-RX3 of the third region 510, and transmit the negative second touch signal on the second signal channels RX4-RX6 of the fourth region 520.

In some embodiments, the number of first signal channels in the j first regions is greater than the number of first signal channels in the k second regions, and the voltage amplitude of the first touch signal is less than the voltage amplitude of the second touch signal. As shown in FIG6 , the touch chip can divide the touch screen into a first region 610 and a second region 620 according to the first signal channel, and the number of first signal channels in the first region 610 is greater than the number of first signal channels in the second region 620. The first touch signal with a positive phase and a smaller voltage amplitude is transmitted on the first signal channels TX1-TX5 of the first region 610, and the second touch signal with a negative phase and a larger voltage amplitude is transmitted on the first signal channels TX6-TX8 of the second region 620.

In some embodiments, the number ratio of the first signal channels of the j first regions to the first signal channels of the k second regions and the voltage amplitude ratio of the first touch signal to the second touch signal are as close as possible, for example, the number ratio is 3:2 and the voltage amplitude ratio is 2:3.

Similarly, when the second signal channel is used as the transmitting channel and the first signal channel is used as the receiving channel again in the detection cycle to perform the second touch detection, in some embodiments, the number of the second signal channels in the i third regions is greater than the number of the second signal channels in the h fourth regions, and the voltage amplitude of the first touch signal is less than the voltage amplitude of the second touch signal. As shown in FIG7 , the touch chip can divide the touch screen into a third region 710 and a fourth region 720 according to the second signal channel, and the number of the second signal channels in the third region 710 is greater than the number of the second signal channels in the fourth region 720. A first touch signal with a positive phase and a smaller voltage amplitude is transmitted on the first signal channel RX1-RX4 of the third area 710, and a second touch signal with a negative phase and a larger voltage amplitude is transmitted on the second signal channel RX5-RX6 of the fourth area 720.

In some embodiments, the quantity ratio of the second signal channels of the i third regions to the second signal channels of the h fourth regions and the voltage amplitude ratio of the first touch signal to the second touch signal are as close as possible, for example, the quantity ratio is 3:2 and the voltage amplitude ratio is 2:3.

In some embodiments, the number of first signal channels in the j first regions is less than the number of first signal channels in the k second regions, and the voltage amplitude of the first touch signal is greater than the voltage amplitude of the second touch signal. As shown in FIG8 , the touch chip can divide the touch screen into a first region 810 and a second region 820 according to the first signal channel, and the number of first signal channels in the first region 810 is less than the number of first signal channels in the second region 820. The first touch signal with a positive phase and a larger voltage amplitude is transmitted on the first signal channels TX1-TX3 of the first region 810, and the second touch signal with a negative phase and a smaller voltage amplitude is transmitted on the first signal channels TX4-TX8 of the second region 820.

Similarly, in the detection cycle, the second signal channel is used as the transmission channel again, and the first signal channel is used as the receiving channel to perform the second touch detection. In some embodiments, the number of the second signal channels in the i third regions is less than the number of the second signal channels in the h fourth regions, and the voltage amplitude of the first touch signal is greater than the voltage amplitude of the second touch signal. As shown in FIG9 , the touch chip can divide the touch screen into a third region 910 and a fourth region 920 according to the second signal channel, and the number of the second signal channels in the third region 910 is less than the number of the second signal channels in the fourth region 920. A first touch signal with a positive phase and a larger voltage amplitude is transmitted on the first signal channel RX1-RX2 of the third area 910, and a second touch signal with a negative phase and a smaller voltage amplitude is transmitted on the second signal channel RX3-RX6 of the fourth area 920.

In some embodiments, j first regions and k second regions on the touch screen are determined according to the first signal channel, including: j=k, j+k=n, n is an even number, or j=k-1 or j=k+1, j+k=n, n is an odd number. That is, each first signal channel is divided into a region, and finally a plurality of alternating first regions and second regions are obtained. As shown in FIG10 , the touch chip can divide the touch screen into four first regions 1010 according to the first signal channel, which are the first signal channels TX1, TX3, TX5, and TX7, and divide the touch screen into four second regions 1020, which are the first signal channels TX2, TX4, TX6, and TX8. A positive-phase first touch signal is transmitted on the first signal channels TX1, TX3, TX5, and TX7, and a negative-phase second touch signal is transmitted on the first signal channels TX2, TX4, TX6, and TX8.

Similarly, when the second signal channel is used as the transmitting channel and the first signal channel is used as the receiving channel again in the detection cycle to perform the second touch detection, in some embodiments, i second areas and h fourth areas on the touch screen are determined according to the second signal channel, including: i=h, i+h=m, m is an even number, or i=h-1 or i=h+1, i+h=m, m is an odd number. That is, each second signal channel is divided into one area, and finally a plurality of alternating third areas and fourth areas are obtained. As shown in FIG11 , the touch chip can divide the touch screen into three third regions 1110 according to the second signal channel, which are the second signal channels RX1, RX3, and RX5, and divide the touch screen into three fourth regions 1120, which are the second signal channels RX2, RX4, and RX6. The first touch signal with a positive phase is transmitted on the second signal channels RX1, RX3, and RX5, and the second touch signal with a negative phase is transmitted on the second signal channels RX2, RX4, and RX6.

The present application also provides a touch chip, which is used to connect to n first signal channels and m second signal channels in a touch screen. The first signal channel and the second signal channel are orthogonal, and are used to transmit touch signals and complete touch detection. The touch chip is used to execute the touch detection method of any of the above embodiments.

The present application also provides a touch control device, including a display screen and a touch screen. The touch control device also includes the above-mentioned touch control chip.

It can be understood that the beneficial effects that can be achieved by the touch chip and the touch device provided in the embodiment of the present application can refer to the beneficial effects of the corresponding touch detection method provided above, and will not be elaborated here.

The embodiment of the present application also provides a computer storage medium, which stores a computer program. When the computer program is executed by a processor, the processor executes the above-mentioned touch detection method.

In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer storage medium or transmitted via the computer storage medium. The computer instructions may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a digital versatile disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes. In the absence of conflict, the technical features in this embodiment and the implementation scheme can be combined arbitrarily.

The embodiments described above are merely preferred embodiments of the present application and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements made to the technical solutions of the present application by ordinary technicians in this field shall fall within the scope of protection determined in the application document of the present application.

100: touch screen 110: touch electrode 120: touch electrode 410: first area 420: second area 510: third area 520: fourth area 610: first area 620: second area 710: third area 720: fourth area 810: first area 820: second area 910: third area 920: fourth area 1010: first area 1020: second area 1110: third area 1120: fourth area S21~S23, S31~S36: steps

FIG. 1 is a schematic diagram of the structure of a touch screen provided in an embodiment of the present application. FIG. 2 is a schematic diagram of the process of a touch detection method provided in an embodiment of the present application. FIG. 3 is a schematic diagram of the process of another touch detection method provided in an embodiment of the present application. FIG. 4 is a schematic diagram of the first touch screen provided in an embodiment of the present application, which is divided into a first area and a second area. FIG. 5 is a schematic diagram of the first touch screen provided in an embodiment of the present application, which is divided into a third area and a fourth area. FIG. 6 is a schematic diagram of the second touch screen provided in an embodiment of the present application, which is divided into a first area and a second area. FIG. 7 is a schematic diagram of the second touch screen provided in an embodiment of the present application, which is divided into a third area and a fourth area. FIG8 is a schematic diagram of the third touch screen provided in the embodiment of the present application, which is divided into the first area and the second area. FIG9 is a schematic diagram of the third touch screen provided in the embodiment of the present application, which is divided into the third area and the fourth area. FIG10 is a schematic diagram of the fourth touch screen provided in the embodiment of the present application, which is divided into the first area and the second area. FIG11 is a schematic diagram of the fourth touch screen provided in the embodiment of the present application, which is divided into the third area and the fourth area.

without

S21~S23: Steps

Claims (9)

A touch detection method is improved in that it is applied to a touch screen, the touch screen includes n first signal channels and m second signal channels orthogonal to the first signal channels, the first signal channels and the second signal channels are used to transmit touch signals and complete touch detection, wherein n≥2, m≥2, the method includes: In the current detection cycle, j first areas and k second areas on the touch screen are determined according to the first signal channel, the first areas and the second areas do not overlap, wherein j≥1, k≥1; Control the first signal channel in the first area to transmit a first touch signal, and control the first signal channel in the second area to transmit a second touch signal, the first touch signal and the second touch signal have opposite phases; Obtain m first detection signals output by the second signal channel, the first detection signal is used to detect the touch operation in the direction of the second signal channel; Determine i third areas and h fourth areas on the touch screen according to the second signal channel, the third area and the fourth area do not overlap, wherein i≥1, h≥1; Control the second signal channel in the third area to transmit the first touch signal, and control the second signal channel in the fourth area to transmit the second touch signal; Obtain n second detection signals output by the first signal channel, the second detection signal is used to detect the touch operation in the direction of the first signal channel, and obtain the two-dimensional coordinates of the touch operation in conjunction with the first detection signal. A touch detection method as described in claim 1, wherein the number of the first signal channels of j first regions is equal to the number of the first signal channels of k second regions, and the voltage amplitude of the first touch signal is equal to the voltage amplitude of the second touch signal; Or, the number of the first signal channels of j first regions is greater than the number of the first signal channels of k second regions, and the voltage amplitude of the first touch signal is less than the voltage amplitude of the second touch signal; Or, the number of the first signal channels of j first regions is less than the number of the first signal channels of k second regions, and the voltage amplitude of the first touch signal is greater than the voltage amplitude of the second touch signal. The touch detection method as described in claim 1, wherein determining j first areas and k second areas on the touch screen according to the first signal channel comprises: Alternatingly dividing the first areas and the second areas on the touch screen according to the arrangement direction of the first signal channel to determine j first areas and k second areas. A touch detection method as described in claim 3, wherein j=k, j+k=n, and n is an even number; or, j=k-1 or j=k+1, j+k=n, and n is an odd number. A touch detection method as described in claim 1, wherein the number of the second signal channels of i third regions is equal to the number of the second signal channels of h fourth regions, and the voltage amplitude of the first touch signal is equal to the voltage amplitude of the second touch signal; Or, the number of the second signal channels of i third regions is greater than the number of the second signal channels of h fourth regions, and the voltage amplitude of the first touch signal is less than the voltage amplitude of the second touch signal; Or, the number of the second signal channels of i third regions is less than the number of the second signal channels of h fourth regions, and the voltage amplitude of the first touch signal is greater than the voltage amplitude of the second touch signal. The touch detection method as described in claim 1, wherein determining i third areas and h fourth areas on the touch screen according to the second signal channel comprises: Alternatingly dividing the third area and the fourth area on the touch screen according to the arrangement direction of the second signal channel to determine i first areas and h second areas. A touch detection method as described in claim 6, wherein i=h, i+h =m, and m is an even number; or, i=h-1 or i=h+1, i+h =m, and m is an odd number. A touch chip is improved in that it is used to connect to n first signal channels and m second signal channels in a touch screen, wherein the first signal channels and the second signal channels are orthogonal and are used to transmit touch signals and complete touch detection. The touch chip is used to execute the touch detection method as described in any one of claims 1 to 7. A touch control device includes a display screen and a touch screen, wherein the improvement lies in that the touch control device further includes a touch control chip as described in claim 8.