Touch Detection Method, Touch Control Chip and Touch Control Device

Abstract

The present application discloses a touch detection method, a touch control chip and a touch control device. The touch detection method is applied to a touch screen, which 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 control signals and complete touch detection. The method includes: determining j first regions and k second regions on the touch screen according to the first signal channels in the current detection period, where the first regions and the second regions do not overlap; controlling the first signal channels in the first regions to transmit first touch control signals, and controlling the first signal channels in the second regions to transmit second touch control signals, where the phases of the first touch control signal and the second touch control signal are opposite; obtaining first detection signals output by the m second signal channels, where the first detection signals are used to detect touch operations in the direction of the second signal channels. The present application can reduce the influence of the touch screen on the display effect of the display screen when detecting touches.

Description

Technical Field

[0001] This application relates to the field of touch technology, and particularly to a touch detection method, a touch control chip, and a touch control device. Background Art

[0002] Currently, with the continuous progress of touch screen technology, the human-computer interaction functions of most electronic products on the market are realized by touch screens. Especially for various electronic terminal products, such as mobile phones, tablet computers, laptops, and e-books, most of them use capacitive touch screens for human-computer interaction.

[0003] The principle of a capacitive touch screen is to determine whether there is a touch operation and the position of the touch operation based on the change in capacitance value before and after touching. In the mainstream detection method, in order to improve the accuracy of touch detection, the signal-to-noise ratio of the touch signal needs to be high enough, so a touch signal with a relatively high amplitude is used. Since the touch screen and the display screen are stacked, a parasitic capacitance will be formed between them. A large amount of charge generated by the touch screen will be coupled to the display screen through the parasitic capacitance, thus affecting the display effect of the display screen. Summary of the Invention

[0004] In view of this, this application provides a touch detection method, a touch control chip, and a touch control 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. The technical solutions of this application are as follows:

[0005] In a first aspect of this application, a touch detection method is provided, which 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. The method includes: determining j first regions and k second regions on the touch screen according to the first signal channels in the current detection cycle, where the first regions and the second regions do not overlap; controlling the first signal channels in the first regions to transmit a first touch signal, and controlling the first signal channels in the second regions to transmit a second touch signal, where the phases of the first touch signal and the second touch signal are opposite; obtaining first detection signals output by the m second signal channels, where the first detection signals are used to detect touch operations in the direction of the second signal channels; where n≥2, m≥2, j≥1, and k≥1.

[0006] In one embodiment of the present application, the method further includes: determining i third regions and h fourth regions on the touch screen according to the second signal channels, where the third regions and the fourth regions do not overlap; controlling the second signal channels in the third regions to transmit the first touch signal, and controlling the second signal channels in the fourth regions to transmit the second touch signal; obtaining second detection signals output by n first signal channels, where the second detection signals are used to detect touch operations in the direction of the first signal channels, and obtaining two-dimensional coordinates of the touch operations by combining the first detection signals; where i≥1 and h≥1.

[0007] In one embodiment of the present application, the number of first signal channels of j first regions is equal to the number of 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 first signal channels of j first regions is greater than the number of 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 first signal channels of j first regions is less than the number of 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.

[0008] In one embodiment of the present application, the determining j first regions and k second regions on the touch screen according to the first signal channels includes: alternately dividing the first regions and the second regions on the touch screen according to the arrangement direction of the first signal channels to determine j first regions and k second regions.

[0009] In one 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.

[0010] In one embodiment of the present application, the number of second signal channels of i third regions is equal to the number of 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 second signal channels of i third regions is greater than the number of 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 second signal channels of i third regions is less than the number of 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.

[0011] In an embodiment of the present application, determining the i third regions and h fourth regions on the touch screen according to the second signal channel includes: alternately dividing the third regions and the fourth regions on the touch screen according to the arrangement direction of the second signal channel to determine the i first regions and the h second regions.

[0012] 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.

[0013] A second aspect of the present application provides a touch chip for connecting 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 for transmitting touch signals and completing touch detection. The touch chip is used to execute the touch detection method described above.

[0014] A third aspect of the present application provides a touch device. The touch device includes a display screen and a touch screen, and the touch device further includes the touch chip described above.

[0015] In the detection period of the present application, the touch screen is divided into at least one first region and at least one second region according to the first signal channel, and a first touch signal is transmitted to the first region and a second touch signal is transmitted to the second region. Since the phases of the first touch signal and the second touch signal are opposite, the charges generated in the first region and the second region cancel each other out, thereby reducing the amount of charge coupled from the touch screen to the display screen through the parasitic capacitance, and further reducing the influence of the touch screen on the display effect of the display screen during touch detection. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a touch screen provided by an embodiment of the present application.

[0017] Figure 2 is a schematic flowchart of a touch detection method provided by an embodiment of the present application.

[0018] Figure 3 is a schematic flowchart of another touch detection method provided by an embodiment of the present application.

[0019] Figure 4 is a schematic diagram of the first touch screen dividing the first region and the second region provided by an embodiment of the present application.

[0020] Figure 5 is a schematic diagram of the first touch screen dividing the third region and the fourth region provided by an embodiment of the present application.

[0021] Figure 6 is a schematic diagram of the second touch screen dividing the first region and the second region provided by an embodiment of the present application.

[0022] Figure 7 It is a schematic diagram of the second touch screen provided by an embodiment of the present application for dividing a third area and a fourth area.

[0023] Figure 8 It is a schematic diagram of the third touch screen provided by an embodiment of the present application for dividing a first area and a second area.

[0024] Figure 9 It is a schematic diagram of the third touch screen provided by an embodiment of the present application for dividing a third area and a fourth area.

[0025] Figure 10 It is a schematic diagram of the fourth touch screen provided by an embodiment of the present application for dividing a first area and a second area.

[0026] Figure 11 It is a schematic diagram of the fourth touch screen provided by an embodiment of the present application for dividing a third area and a fourth area. Detailed implementation manners

[0027] It should be noted that in the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more than two. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, 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, claims and drawings of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence.

[0028] In addition, it should be noted that the methods disclosed in the embodiments of the present application or the methods shown in the flowcharts include one or more steps for implementing the methods. Without departing from the scope of the claims, the execution order of multiple steps can be interchanged with each other, and some steps can also be deleted.

[0029] Currently, with the continuous progress of touch screen technology, the human-computer interaction functions of most electronic products on the market are realized by touch screens. Especially for 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.

[0030] The principle of a capacitive touch screen is to determine whether there is a touch operation and the position of the touch operation based on the change in capacitance value before and after touching. In mainstream detection methods, in order to improve the accuracy of touch detection, the signal-to-noise ratio of the touch signal needs to be high enough, so a touch signal with a relatively high amplitude is used. Since the touch screen and the display screen are stacked, the encapsulation layer between the two will form a parasitic capacitance. Therefore, in mainstream detection methods, a large amount of charge generated by the touch screen will be coupled to the display screen through the parasitic capacitance, thus affecting the display effect of the display screen.

[0031] The embodiments of the present application provide a touch detection method, a touch control chip, and a touch control 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.

[0032] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of a touch screen provided by the embodiments of the present application. Among them, the touch screen 100 includes multiple rows of touch electrodes 110 (5 rows of touch electrodes 110 are exemplified in the figure, and each row includes 5 connected diamond-shaped touch electrodes), and multiple columns of touch electrodes 120 (4 columns of touch electrodes 120 are exemplified in the figure, and 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. Among them, 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. A node capacitance is formed at the intersection of the first signal channel and the second signal channel.

[0033] In some embodiments, when detecting a touch operation on the touch screen 100, a carrier touch signal with a preset frequency can be transmitted through the first signal channel, and the second signal channel receives the detection signal through node mutual capacitance. When a touch operation occurs at a certain node, the capacitance value of this node will change, so that the detection signal received by the corresponding second signal channel changes, and then the touch operation and its position on the touch screen 100 can be detected.

[0034] Next, in combination with Figure 2 a touch detection method provided by the embodiments of the present application is introduced. Among them, the touch detection method is applied to a touch screen, and 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, where n≥2 and m≥2. Among them, the touch detection method includes:

[0035] Step S21: Determine j first regions and k second regions on the touch screen according to the first signal channels in the current detection period. The first regions and the second regions do not overlap, where j≥1 and k≥1.

[0036] In an 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, a notebook, etc. A user clicks on the touch screen with a finger or a stylus, or performs a sliding operation on the touch screen, so as to perform human-computer interaction with the touch device.

[0037] Wherein, a touch chip is further included on the touch screen or the touch device. The touch chip is used to execute the control logic for touch detection, for example, to transmit a touch signal to a signal channel on the touch screen, and receive a detection signal, and complete touch detection according to the detection signal. Among them, the detection period is a working period for the touch chip to perform touch detection. During the detection period, the touch chip can transmit a touch signal to each first signal channel, receive the detection signal of 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.

[0038] It can be understood that when the touch chip of the present application enters the current detection period, it first divides the touch screen into regions according to the first signal channels to determine j first regions and k second regions on the touch screen. Taking Figure 1 the touch screen 100 shown as an example, the touch chip can divide the first signal channels TX1 - TX2 into a first region, divide the first signal channels TX3 - TX5 into a second region, or the touch chip can divide the first signal channels TX1 - TX2 into a first region, divide the first signal channels TX3 - TX4 into a second region, and divide the first signal channel TX5 into a first region.

[0039] Step S22: Control the first signal channels in the first region to transmit a first touch signal, and control the first signal channels in the second region to transmit a second touch signal. The first touch signal and the second touch signal have opposite phases.

[0040] In an embodiment of the present application, the touch chip uses the first signal channel as a transmission channel, that is, the first signal channel is used to transmit a touch signal, and uses the second signal channel as a reception channel, that is, the second signal channel is used to receive a detection signal through node mutual capacitance.

[0041] Wherein, after the touch chip determines at least one first region and at least one second region according to the first signal channels, it transmits a first touch signal to the first region and transmits a second touch signal to the second region. It can be understood that since the first touch signal and the second touch signal have opposite phases, that is, the charges generated when the first region transmits the first touch signal can cancel out the charges generated when the second region transmits the second touch signal.

[0042] Exemplarily, 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, the second region is at the trough of the sine wave. Then, 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 cancel each other out, thereby reducing the amount of charge coupled from the touch screen to the display screen through the parasitic capacitance.

[0043] Step S23: Obtain the first detection signals output by the m second signal channels. The first detection signals are used to detect touch operations in the direction of the second signal channels.

[0044] In the embodiment of the present application, after the touch chip transmits the first touch signal to the first signal channels in the first region and transmits the second touch signal to the first signal channels in the second region, it will obtain the first detection signals of each second signal channel. For example, the touch chip can simultaneously obtain the first detection signals output by the m second signal channels, or scan the m second signal channels in a preset order to sequentially obtain the first detection signals.

[0045] Among them, since the first touch signal and the second touch signal cancel each other out, in the second signal channels where no touch operation occurs, the amplitude of the corresponding first detection signal obtained by the touch chip is small or approaches zero. In the second signal channels where a touch operation occurs, the amplitude of the corresponding first detection signal obtained by the touch chip is large, or the amplitude approaches the amplitude of the first touch signal or the second touch signal, and thus the touch operation can be detected. For example, when an operation occurs in the first region, the phase of the corresponding first detection signal obtained by the touch chip is consistent with the first touch signal and the amplitude approaches.

[0046] Take Figure 1 the shown touch screen 100 as an example. The first touch signal or the second touch signal is transmitted in sub-regions on the first signal channels TX1 - TX5, and the first detection signals output by the second signal channels RX1 - RX4 are obtained, so as to detect the touch operation in the direction of the second signal channels, that is, specifically detect which RX has a touch operation.

[0047] It can be understood that in the embodiment of the present application, the touch screen is divided into at least one first region and at least one second region according to the first signal channels during the detection period, and the first touch signal is transmitted to the first region and the second touch signal is transmitted to the second region. Since the first touch signal and the second touch signal have opposite phases, the charges generated in the first region and the second region cancel each other out, thereby reducing the amount of charge coupled from the touch screen to the display screen through the parasitic capacitance, and further reducing the influence of the touch screen on the display effect of the display screen when detecting touch.

[0048] In an embodiment of the present application, the step of determining j first regions and k second regions on the touch screen according to the first signal channel includes: alternately dividing the first regions and the second regions on the touch screen according to the arrangement direction of the first signal channel to determine j first regions and k second regions.

[0049] Please refer to Figure 3 , Figure 3 which is a schematic flowchart of another touch detection method provided by an embodiment of the present application. Among them, Figure 3 the shown touch detection method includes steps S31 - S33, and steps S31 - S33 are the same as Figure 2 the steps S21 - S23 shown, and will not be elaborated here. Figure 3 The touch detection method shown in Figure 2 is different from the touch detection method shown in Figure 3 in that the touch detection method shown in

[0050] further includes:

[0051] Step S34: Determine i third regions and h fourth regions on the touch screen according to the second signal channel, where the third regions and the fourth regions do not overlap, and i≥1, h≥1.

[0051] In an embodiment of the present application, in the current detection cycle, after the touch chip obtains the first detection signals of m second signal channels, the first signal channel can also be used as the receiving channel and the second signal channel as the transmitting channel. That is, the second signal channel is used to transmit touch signals, and the first signal channel is used to receive detection signals, and the touch chip performs the detection of the touch operation again in the current detection cycle.

[0052] Among them, the touch chip re - divides the touch screen according to the second signal channel to determine i third regions and h fourth regions on the touch screen. Taking Figure 1 the touch screen 100 shown as an example, the touch chip can divide the second signal channels RX1 - RX2 into third regions and the second signal channels RX3 - RX4 into fourth regions.

[0053] Step S35: Control the second signal channels in the third regions to transmit the first touch signal, and control the second signal channels in the fourth regions to transmit the second touch signal.

[0054] In an 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 regions and the second touch signal to the fourth regions. It can be understood that since the first touch signal and the second touch signal have opposite phases, that is, the charges generated by transmitting the first touch signal in the third regions can cancel out the charges generated by transmitting the second touch signal in the fourth regions.

[0055] Exemplarily, 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, the fourth region is at the trough of the sine wave. Then, a large amount of positive charges are generated in the third region and a large amount of negative charges are generated in the fourth region. Therefore, the charges generated in the third region and the fourth region can cancel each other out, thereby reducing the amount of charge coupled from the touch screen to the display screen through the parasitic capacitance.

[0056] Step S36: Obtain second detection signals output by n first signal channels. The second detection signals are used to detect touch operations in the direction of the first signal channels, and jointly use the first detection signals to obtain the two-dimensional coordinates of the touch operations.

[0057] In the embodiment of the present application, after the touch chip transmits the first touch signal to the second signal channels in the third region and transmits the second touch signal to the second signal channels in the fourth region, it will obtain the second detection signals 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 the n first signal channels in a preset order to sequentially obtain the second detection signals.

[0058] Taking Figure 1 the shown touch screen 100 as an example, the first touch signal or the second touch signal is transmitted in sub-regions on the second signal channels RX1 - RX4, and the second detection signals output by the first signal channels TX1 - TX5 are obtained, so as to detect the touch operations in the direction of the first signal channels, that is, specifically detect which TX has a touch operation, and then combine the previously detected RX that has a touch operation to obtain the two-dimensional coordinates of the touch operation.

[0059] It can be understood that in the present application, during the detection period, the second signal channels are reused as the transmission channels and the first signal channels are used as the reception channels for the second touch detection to obtain the second detection signals. By jointly using the second detection signals and the first detection signals, the accuracy of detecting touch operations can be further improved. Moreover, by dividing the touch screen into at least one third region and at least one fourth region, and transmitting the first touch signal to the third region and the second touch signal to the fourth region, since the first touch signal and the second touch signal have opposite phases, the charges generated in the third region and the fourth region cancel each other out, thereby reducing the amount of charge coupled from the touch screen to the display screen through the parasitic capacitance, and further reducing the influence of the touch screen on the display effect of the display screen during touch detection.

[0060] In the embodiment of the present application, the step of determining i third regions and h fourth regions on the touch screen according to the second signal channels includes: alternately dividing the third regions and the fourth regions on the touch screen according to the arrangement direction of the second signal channels to determine i first regions and h second regions.

[0061] In some embodiments, the number of first signal channels in the above-mentioned j first regions is equal to the number of first signal channels in 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 Figure 4 shown, the touch chip can divide the touch screen into a first region 410 and a second region 420 according to the first signal channels, and the number of first signal channels in the first region 410 is the same as that in the second region 420. A non-inverted first touch signal is transmitted on the first signal channels TX1-TX4 in the first region 410, and an inverted second touch signal is transmitted on the first signal channels TX5-TX8 in the second region 420.

[0062] Similarly, when the second signal channels are used as the transmitting channels again and the first signal channels are used as the receiving channels during the detection period for the second touch detection, in some embodiments, the number of second signal channels in the above-mentioned i third regions is equal to the number of second signal channels in 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 Figure 5 shown, the touch chip can divide the touch screen into a third region 510 and a fourth region 520 according to the second signal channels. A non-inverted first touch signal is transmitted on the second signal channels RX1-RX3 in the third region 510, and an inverted second touch signal is transmitted on the second signal channels RX4-RX6 in the fourth region 520.

[0063] In some embodiments, the number of first signal channels in the above-mentioned 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 Figure 6 shown, the touch chip can divide the touch screen into a first region 610 and a second region 620 according to the first signal channels. The number of first signal channels in the first region 610 is greater than that in the second region 620. A non-inverted first touch signal with a smaller voltage amplitude is transmitted on the first signal channels TX1-TX5 in the first region 610, and an inverted second touch signal with a larger voltage amplitude is transmitted on the first signal channels TX6-TX8 in the second region 620.

[0064] Among them, in some embodiments, the ratio of the number of first signal channels in the above-mentioned j first regions to the number of first signal channels in the k second regions is as close as possible to the ratio of the voltage amplitudes of the first touch signal and the second touch signal. For example, the number ratio is 3:2 and the voltage amplitude ratio is 2:3.

[0065] Similarly, when the second signal channel is reused as the transmitting channel and the first signal channel is used as the receiving channel for the second touch detection within the detection period, in some embodiments, the number of second signal channels in the above-mentioned i third regions is greater than the number of 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. For example, Figure 7 As shown, the touch chip can divide the touch screen into a third region 710 and a fourth region 720 according to the second signal channel. The number of second signal channels in the third region 710 is greater than that in the fourth region 720. The first touch signal with positive phase and smaller voltage amplitude is transmitted on the first signal channels RX1 - RX4 in the third region 710, and the second touch signal with inverted phase and larger voltage amplitude is transmitted on the second signal channels RX5 - RX6 in the fourth region 720.

[0066] Among them, in some embodiments, the ratio of the number of second signal channels in the above-mentioned i third regions to the number of second signal channels in the h fourth regions is as close as possible to the ratio of the voltage amplitudes of the first touch signal and the second touch signal. For example, the number ratio is 3:2 and the voltage amplitude ratio is 2:3.

[0067] In some embodiments, the number of first signal channels in the above-mentioned 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. For example, Figure 8 As shown, the touch chip can divide the touch screen into a first region 810 and a second region 820 according to the first signal channel. The number of first signal channels in the first region 810 is less than that in the second region 820. The first touch signal with positive phase and larger voltage amplitude is transmitted on the first signal channels TX1 - TX3 in the first region 810, and the second touch signal with inverted phase and smaller voltage amplitude is transmitted on the first signal channels TX4 - TX8 in the second region 820.

[0068] Similarly, when the second signal channel is reused as the transmitting channel and the first signal channel is used as the receiving channel for the second touch detection within the detection period, in some embodiments, the number of second signal channels in the above-mentioned i third regions is less than the number of 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. For example, Figure 9As shown, the touch chip can divide the touch screen into a third area 910 and a fourth area 920 according to the second signal channel. The number of second signal channels in the third area 910 is less than that in the fourth area 920. A first touch signal with a positive phase and a larger voltage amplitude is transmitted on the first signal channels RX1 - RX2 in the third area 910, and a second touch signal with an inverted phase and a smaller voltage amplitude is transmitted on the second signal channels RX3 - RX6 in the fourth area 920.

[0069] In some embodiments, determining j first areas and k second areas on the touch screen according to the first signal channels includes: j = k, j + k = n, where n is an even number, or j = k - 1 or j = k + 1, j + k = n, where n is an odd number. That is, each first signal channel is divided into an area, and finally multiple alternating first areas and second areas are obtained. As Figure 10 shown, the touch chip can divide the touch screen into four first areas 1010 according to the first signal channels, which are the first signal channels TX1, TX3, TX5, TX7 respectively, and divide the touch screen into four second areas 1020, which are the first signal channels TX2, TX4, TX6, TX8 respectively. A first touch signal with a positive phase is transmitted on the first signal channels TX1, TX3, TX5, TX7, and a second touch signal with an inverted phase is transmitted on the first signal channels TX2, TX4, TX6, TX8.

[0070] Similarly, when the second signal channel is used as the transmitting channel and the first signal channel is used as the receiving channel again during the detection period for the second touch detection, in some embodiments, determining i second areas and h fourth areas on the touch screen according to the second signal channels includes: i = h, i + h = m, where m is an even number, or i = h - 1 or i = h + 1, i + h = m, where m is an odd number. That is, each second signal channel is divided into an area, and finally multiple alternating third areas and fourth areas are obtained. As Figure 11 shown, the touch chip can divide the touch screen into three third areas 1110 according to the second signal channels, which are the second signal channels RX1, RX3, RX5 respectively, and divide the touch screen into three second areas 1120, which are the second signal channels RX2, RX4, RX6 respectively. A first touch signal with a positive phase is transmitted on the second signal channels RX1, RX3, RX5, and a second touch signal with an inverted phase is transmitted on the second signal channels RX2, RX4, RX6.

[0071] The present application also provides a touch chip for connecting to n first signal channels and m second signal channels in the 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.

[0072] The present application also provides a touch control device, which includes a display screen and a touch screen. The touch control device further includes the above-mentioned touch control chip.

[0073] It can be understood that for the beneficial effects that can be achieved by the touch control chip and the touch control device provided in the embodiments of the present application, reference can be made to the beneficial effects of the corresponding touch detection method provided above, which will not be elaborated here.

[0074] The embodiments of the present application also provide a computer storage medium, which stores a computer program. When the computer program is executed by a processor, the processor is caused to execute the above-mentioned touch detection method.

[0075] 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 processes or functions described in the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer storage medium or transmitted through the computer storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a Digital Versatile Disc (DVD)), or a semiconductor medium (such as a solid state disk (SSD)).

[0076] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. 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 methods. The foregoing storage medium includes various media that can store program codes, such as ROM, RAM, magnetic disks, or optical discs. Without conflict, the technical features in this embodiment and the implementation solutions can be combined arbitrarily.

[0077] The embodiments described above are only described in terms of the preferred embodiments of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. A touch detection method, characterized in that, 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, where n≥2, m≥2. The method includes: Determining j first regions and k second regions on the touch screen according to the first signal channels in a current detection period, where the first regions and the second regions do not overlap, and j>1, k>1; Controlling the first signal channels in the first regions to transmit a first touch signal, and controlling the first signal channels in the second regions to transmit a second touch signal, where the phases of the first touch signal and the second touch signal are opposite; Obtaining first detection signals output by the m second signal channels, where the first detection signals are used to detect touch operations in the direction of the second signal channels; The determining j first regions and k second regions on the touch screen according to the first signal channels includes: Alternately dividing the first regions and the second regions on the touch screen according to the arrangement direction of the first signal channels to determine j first regions and k second regions, where 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.

2. The touch detection method according to claim 1, wherein, The method further includes: Determining i third regions and h fourth regions on the touch screen according to the second signal channels, where the third regions and the fourth regions do not overlap, and i≥1, h≥1; Controlling the second signal channels in the third regions to transmit the first touch signal, and controlling the second signal channels in the fourth regions to transmit the second touch signal; Obtaining second detection signals output by the n first signal channels, where the second detection signals are used to detect touch operations in the direction of the first signal channels, and obtaining two-dimensional coordinates of the touch operation by combining the first detection signals.

3. The touch detection method according to claim 1, characterized in that The number of the first signal channels in the j first regions is equal to the number of the first signal channels in the 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 in the j first regions is greater than the number of the 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; Or, the number of the first signal channels in the j first regions is less than the number of the 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.

4. The touch detection method according to claim 2, wherein The number of the second signal channels in the i third regions is equal to the number of the second signal channels in the h fourth regions, and the voltage amplitude of the first touch signal is equal to the voltage amplitude of the second touch signal; Alternatively, 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; Alternatively, 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.

5. The touch detection method according to claim 2, wherein The determining of the i third regions and the h fourth regions on the touch screen according to the second signal channels includes: alternately dividing the third regions and the fourth regions on the touch screen according to the arrangement direction of the second signal channels to determine the i first regions and the h second regions.

6. The touch detection method according to claim 5, 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.

7. A touch chip, characterized in that, configured to be connected to n first signal channels and m second signal channels in the touch screen, the first signal channels and the second signal channels being orthogonal, for transmitting touch signals and performing touch detection, and the touch chip being configured to execute the touch detection method according to any one of claims 1 to 6.

8. A touch device, the touch device comprising a display screen and a touch screen, characterized in that, The touch device further includes the touch chip according to claim 7.

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