Touch Component, Touch Chip and Terminal Device

Abstract

The present application discloses a touch control component, a touch control chip and a terminal device, which relate to the field of touch screens and are used to improve the signal-to-noise ratio of the touch screen. The touch control component includes a touch screen and a touch control chip. The touch screen includes a display panel, a first touch control circuit and a second touch control circuit. The first touch control circuit is located in a first touch control area of the display panel, and the second touch control circuit is located in a second touch control area of the display panel. A plurality of detection electrodes of the first touch control circuit and a plurality of detection electrodes of the second touch control circuit are independently electrically connected to the touch control chip. The touch control chip outputs a drive signal to a plurality of drive electrodes of the first touch control circuit and receives a first detection signal from the plurality of detection electrodes of the first touch control circuit to detect a touch operation in the first touch control area. The touch control chip outputs a drive signal to a plurality of drive electrodes of the second touch control circuit and receives a second detection signal from the plurality of detection electrodes of the second touch control circuit to detect a touch operation in the second touch control area.

Description

Technical Field

[0001] This application relates to the field of touch screens, and in particular, to a touch component, a touch chip, and a terminal device. Background Art

[0002] More and more terminal devices (such as tablet computers, mobile phones, etc.) adopt foldable screens or large-sized touch screens, which makes the size of the touch screen continuously increase, and the noise output by the touch screen also increases exponentially, resulting in a decrease in the signal-to-noise ratio (the ratio of the effective signal to the noise) of the touch screen, thus affecting the touch performance of the touch screen and possibly causing mis-touch operations. Summary of the Invention

[0003] Embodiments of this application provide a touch component, a touch chip, and a terminal device for improving the signal-to-noise ratio of a touch screen.

[0004] To achieve the above object, the embodiments of this application adopt the following technical solutions:

[0005] In a first aspect, a touch component is provided, including: a touch screen and a touch chip. The touch screen includes a display panel, a first touch circuit, and a second touch circuit. The first touch circuit is located in a first touch area of the display panel, and the second touch circuit is located in a second touch area of the display panel; the first touch circuit includes a plurality of driving electrodes and a plurality of detecting electrodes, and the second touch circuit includes a plurality of driving electrodes and a plurality of detecting electrodes; the plurality of detecting electrodes of the first touch circuit are independently electrically connected to the touch chip, and the plurality of driving electrodes of the first touch circuit are independently electrically connected to the touch chip; the plurality of detecting electrodes of the second touch circuit are independently electrically connected to the touch chip, and the plurality of driving electrodes of the second touch circuit are independently electrically connected to the touch chip; the touch chip is configured to output a driving signal to the plurality of driving electrodes of the first touch circuit, and receive a first detection signal from the plurality of detecting electrodes of the first touch circuit, where the first detection signal is used to detect a touch operation in the first touch area; the touch chip is further configured to output a driving signal to the plurality of driving electrodes of the second touch circuit, and receive a second detection signal from the plurality of detecting electrodes of the second touch circuit, where the second detection signal is used to detect a touch operation in the second touch area.

[0006] The touch component provided by the embodiments of this application is not only applicable to medium and large touch screens (such as the touch screens of tablet computers, notebook computers, etc.) and foldable screens (such as the touch screens of foldable mobile phones), but also has a low manufacturing cost. And because the touch circuit is divided into multiple ones, each touch circuit has independent detecting electrodes and driving electrodes, the length of the detecting electrodes in a single touch circuit is reduced, the load of the detecting electrodes and the generated noise are reduced exponentially, so that the signal-to-noise ratio (the ratio of the effective signal to the noise) of the touch screen is greatly improved, thereby improving the touch performance of the touch screen.

[0007] In a possible implementation, the touch screen is a foldable screen folded along a folding line, and the first touch area and the second touch area are located on both sides of the folding line. After the touch screen is folded, when the first touch circuit detects a user's touch operation in the first touch area, the second touch circuit can be in a disabled state, that is, the second touch circuit does not detect the user's touch operation in the second touch area, and the operation of the palm or finger in the second touch area will not become noise. Therefore, the noise output by the touch screen can be reduced.

[0008] In a possible implementation, the multiple detection electrodes of the first touch circuit are electrically isolated from the multiple detection electrodes of the second touch circuit. That is to say, the detection electrodes of different touch circuits do not affect each other, and the output detection signals are independent.

[0009] In a possible implementation, the multiple driving electrodes of the first touch circuit are electrically isolated from the multiple driving electrodes of the second touch circuit. That is to say, the driving electrodes of different touch circuits do not affect each other, and the received driving signals are independent.

[0010] In a possible implementation, the touch chip includes a first set of driving pins, a second set of driving pins, a first set of detection pins, a second set of detection pins, a control circuit, and multiple analog front-end circuits; the first set of driving pins is electrically connected to the multiple driving electrodes of the first touch circuit, and the first set of detection pins is electrically connected to the multiple detection electrodes of the first touch circuit; the second set of driving pins is electrically connected to the multiple driving electrodes of the second touch circuit, and the second set of detection pins is electrically connected to the multiple detection electrodes of the second touch circuit; the control circuit is used to output a driving signal to the multiple driving electrodes of the first touch circuit through the first set of driving pins, and receive a first detection signal from the multiple detection electrodes of the first touch circuit through the first set of detection pins; the control circuit is further used to output a driving signal to the multiple driving electrodes of the second touch circuit through the second set of driving pins, and receive a second detection signal from the multiple detection electrodes of the second touch circuit through the second set of detection pins; the multiple analog front-end circuits are used to perform analog-to-digital conversion on the first detection signal and / or the second detection signal. This touch chip can control the independent touch circuits in the touch screen separately and obtain detection signals from the independent touch circuits separately.

[0011] In a possible implementation, the touch chip further includes multiple selection switches, and the control circuit is further used to: control the multiple selection switches to select the first set of detection pins or the second set of detection pins to be electrically connected to the input end of the multiple analog front-end circuits. Controlled by the control circuit, the multiple selection switches can select a set of detection pins to be electrically connected to the input end of the multiple analog front-end circuits, so as to realize time-division multiplexing of the analog front-end circuits, reduce the number of analog front-end circuits, reduce the cost of the touch chip, and reduce the area of the touch chip.

[0012] In a second aspect, a touch chip is provided, including: a first set of driving pins, a second set of driving pins, a first set of detecting pins, a second set of detecting pins, a control circuit, and a plurality of analog front-end circuits. The first set of driving pins is used for electrically connecting to a plurality of driving electrodes of a first touch circuit of a touch screen, and the first set of detecting pins is used for electrically connecting to a plurality of detecting electrodes of the first touch circuit; the second set of driving pins is used for electrically connecting to a plurality of driving electrodes of a second touch circuit of the touch screen, and the second set of detecting pins is used for electrically connecting to a plurality of detecting electrodes of the second touch circuit; the control circuit is used for outputting driving signals to the plurality of driving electrodes of the first touch circuit through the first set of driving pins, and receiving first detection signals from the plurality of detecting electrodes of the first touch circuit through the first set of detecting pins; the control circuit is further used for outputting driving signals to the plurality of driving electrodes of the second touch circuit through the second set of driving pins, and receiving second detection signals from the plurality of detecting electrodes of the second touch circuit through the second set of detecting pins; the plurality of analog front-end circuits are used for performing analog-to-digital conversion on the first detection signals and / or the second detection signals. This touch chip can control the independent touch circuits in the touch screen separately and obtain detection signals from the independent touch circuits separately.

[0013] In a possible implementation, the touch chip further includes a plurality of selection switches, and the control circuit is used for: controlling the plurality of selection switches to select the first set of detecting pins or the second set of detecting pins to be electrically connected to the input ends of the plurality of analog front-end circuits. Controlled by the control circuit, the plurality of selection switches can select a set of detecting pins to be electrically connected to the input ends of the plurality of analog front-end circuits, so as to achieve time-division multiplexing of the analog front-end circuits, reduce the number of analog front-end circuits, reduce the cost of the touch chip, and reduce the area of the touch chip.

[0014] In a third aspect, a terminal device is provided, including the touch screen as described in the first aspect and any of its embodiments.

[0015] Regarding the technical effects of the third aspect, refer to the technical effects of the first aspect, which will not be elaborated here. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a terminal device provided by an embodiment of the present application;

[0017] Figure 2 It is a schematic structural diagram of a folding screen that folds outwards provided by an embodiment of the present application;

[0018] Figure 3 It is a schematic structural diagram of a folding screen that folds inwards provided by an embodiment of the present application;

[0019] Figure 4 It is a schematic diagram of the structure and working principle of a touch screen provided by an embodiment of the present application;

[0020] Figure 5 A structural schematic diagram of a touch screen and a touch chip provided by an embodiment of the present application;

[0021] Figure 6 Another structural schematic diagram of a touch screen and a touch chip provided by an embodiment of the present application;

[0022] Figure 7 Yet another structural schematic diagram of a touch screen and a touch chip provided by an embodiment of the present application;

[0023] Figure 8 Still another structural schematic diagram of a touch screen and a touch chip provided by an embodiment of the present application;

[0024] Figure 9 Another structural schematic diagram of a foldable screen that folds outwards provided by an embodiment of the present application. Detailed implementation manners

[0025] It should be noted that the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of distinguishing the same type of features, and should not be understood as indicating relative importance, quantity, order, etc.

[0026] The terms "exemplary" or "for example" etc. involved in the embodiments of the present application are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, the use of the terms "exemplary" or "for example" etc. aims to present the relevant concepts in a specific manner.

[0027] The terms "coupled" and "connected" involved in the embodiments of the present application should be understood in a broad sense. For example, it can refer to a direct physical connection, or an indirect connection realized through electronic devices, such as a connection realized through resistors, inductors, capacitors or other electronic devices.

[0028] Embodiments of the present application provide a terminal device. The terminal device can be a device with wireless transceiver functions. The terminal device can be mobile or fixed. The terminal device can be deployed on land (such as indoors or outdoors, handheld or vehicle-mounted, etc.), can also be deployed on water (such as a ship, etc.), and can also be deployed in the air (such as an airplane, a balloon, a satellite, etc.). The terminal device can be a user equipment (UE), an access terminal, a terminal unit, a user unit, a terminal station, a mobile station (MS), a mobile phone, a remote station, a remote terminal, a mobile device, a wireless communication device, a terminal agent, or a terminal device, etc. in a fourth-generation (4th generation, 4G) network, a fifth-generation (5th generation, 5G) network, or a future evolved public land mobile network (PLMN). For example, the terminal device can be a mobile phone, a tablet computer, a laptop computer, a smart bracelet, a smart watch, a headset, a smart speaker, a virtual reality (VR) device, an augmented reality (AR) device, a wireless terminal in industrial control, a wireless terminal in self-driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, etc. Embodiments of the present application do not limit the specific type and structure of the terminal device, etc.

[0029] Taking the terminal device as a mobile phone as an example, Figure 1 A possible structure of the terminal device is shown. The terminal device 200 may include a processor 210, an external memory interface 220, an internal memory 221, a universal serial bus (USB) interface 230, a power management module 240, a battery 241, a wireless charging coil 242, antenna 1, antenna 2, a mobile communication module 250, a wireless communication module 260, an audio module 270, a speaker 270A, a receiver 270B, a microphone 270C, a headphone interface 270D, a sensor module 280, a button 290, a motor 291, an indicator 292, a camera 293, a touch component 294, and a subscriber identification module (SIM) card interface 295, etc.

[0030] Among them, the sensor module 280 may include a pressure sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor, a bone conduction sensor, etc.

[0031] It can be understood that the structure schematically shown in the embodiments of the present invention does not constitute a specific limitation on the terminal device 200. In other embodiments of the present application, the terminal device 200 may include more or fewer components than those shown in the figure, or combine certain components, or split certain components, or have different component arrangements. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0032] The processor 210 may include one or more processing units. For example, the processor 210 may include a central processing unit (CPU), an application processor (AP), a modulation and demodulation processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a memory, a video codec, a digital signal processor (DSP), a baseband processor, and a neural-network processing unit (NPU), etc. Among them, different processing units may be independent devices or integrated in one or more processors. For example, the processor 210 may be an application processor AP. Or, the above-mentioned processor 210 may be integrated in a system on chip (SoC). Or, the above-mentioned processor 210 may be integrated in an integrated circuit (IC) chip. The processor 210 may include an analog front end (AFE) and a micro-controller unit (MCU) in the IC chip.

[0033] Among them, the controller may be the nerve center and command center of the terminal device 200. The controller may generate an operation control signal according to the instruction operation code and the timing signal to complete the control of fetching and executing instructions.

[0034] A memory can also be provided in the processor 210 for storing instructions and data. In some embodiments, the memory in the processor 210 is a cache memory. This memory can hold the instructions or data that the processor 210 has just used or recycled. If the processor 210 needs to use the instruction or data again, it can directly call it from the said memory. This avoids repeated accesses, reduces the waiting time of the processor 210, and thus improves the efficiency of the system.

[0035] In some embodiments, the processor 210 may include one or more interfaces. The interfaces may include an inter-integrated circuit (I2C) interface, an inter-integrated circuit sound (I2S) interface, a pulse code modulation (PCM) interface, a universal asynchronous receiver / transmitter (UART) interface, a mobile industry processor interface (MIPI), a general-purpose input / output (GPIO) interface, a subscriber identity module (SIM) interface, and / or a USB interface, etc.

[0036] It can be understood that the interface connection relationships among the modules illustrated in the embodiments of the present invention are only illustrative descriptions and do not constitute a structural limitation on the terminal device 200. In some other embodiments of the present application, the terminal device 200 may also adopt different interface connection manners in the above embodiments, or a combination of multiple interface connection manners.

[0037] The power management module 240 is configured to receive a charging input from a charger. Among them, the charger can be a wireless charger (such as the wireless charging dock of the terminal device 200 or other devices that can wirelessly charge the terminal device 200), or a wired charger. For example, the power management module 240 can receive the charging input of the wired charger through the USB interface 230. The power management module 240 can receive the wireless charging input through the wireless charging coil 242 of the electronic device.

[0038] Among them, while the power management module 240 charges the battery 241, it can also supply power to the electronic device. The power management module 240 receives the input of the battery 241 and supplies power to the processor 210, the internal memory 221, the external memory interface 220, the touch component 294, the camera 293, the wireless communication module 260, etc. The power management module 240 can also be used to monitor parameters such as the battery capacity, the number of battery cycles, and the battery health status (leakage, impedance) of the battery 241. In some other embodiments, the power management module 240 can also be disposed in the processor 210.

[0039] The wireless communication function of the terminal device 200 can be implemented by the antenna 1, the antenna 2, the mobile communication module 250, the wireless communication module 260, the modulation and demodulation processor, and the baseband processor, etc.

[0040] The antenna 1 and the antenna 2 are used to transmit and receive electromagnetic wave signals. Each antenna in the terminal device 200 can be used to cover a single or multiple communication frequency bands. Different antennas can also be multiplexed to improve the utilization rate of the antennas. For example: The antenna 1 can be multiplexed as the diversity antenna of the wireless local area network. In some other embodiments, the antenna can be used in combination with a tuning switch.

[0041] The mobile communication module 250 can provide solutions for wireless communications including 2G / 3G / 4G / 5G, etc. applied to the terminal device 200. The wireless communication module 260 can provide solutions for wireless communications including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (IR), etc. applied to the terminal device 200. In some embodiments, the antenna 1 of the terminal device 200 is coupled to the mobile communication module 250, and the antenna 2 is coupled to the wireless communication module 260, so that the terminal device 200 can communicate with the network and other devices through wireless communication technologies.

[0042] The terminal device 200 realizes the display function through the GPU, the touch component 294, and the application processor, etc. The GPU is a microprocessor for image processing, and is connected to the touch component 294 and the application processor. The GPU is used to perform mathematical and geometric calculations and is used for graphics rendering. The processor 210 may include one or more GPUs, which execute program instructions to generate or change display information.

[0043] The terminal device 200 can implement the shooting function through the ISP, the camera 293, the video codec, the GPU, the touch component 294, the application processor, etc. The ISP is used to process the data fed back by the camera 293. In some embodiments, the ISP may be disposed in the camera 293. The camera 293 is used to capture still images or videos. In some embodiments, the terminal device 200 may include one or N cameras 293, where N is a positive integer greater than 1.

[0044] The external memory interface 220 can be used to connect an external memory card, such as a micro SanDisk (Micro SD) card, to implement the storage capacity expansion of the terminal device 200. The external memory card communicates with the processor 210 through the external memory interface 220 to implement the data storage function. For example, files such as music and videos are saved in the external memory card.

[0045] The internal memory 221 can be used to store computer-executable program codes, and the executable program codes include instructions. The processor 210 executes various functional applications and data processing of the terminal device 200 by running the instructions stored in the internal memory 221. In addition, the internal memory 221 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc.

[0046] The terminal device 200 can implement the audio function through the audio module 270, the speaker 270A, the receiver 270B, the microphone 270C, the headphone interface 270D, and the application processor, etc. Such as music playback, recording, etc.

[0047] The audio module 270 is used to convert digital audio information into an analog audio signal for output, and is also used to convert an analog audio input into a digital audio signal. In some embodiments, the audio module 270 may be disposed in the processor 210, or some functional modules of the audio module 270 may be disposed in the processor 210. The speaker 270A, also referred to as a "loudspeaker", is used to convert an audio electrical signal into a sound signal. The receiver 270B, also referred to as an "earpiece", is used to convert an audio electrical signal into a sound signal. The microphone 270C, also referred to as a "microphone" or "transmitter", is used to convert a sound signal into an electrical signal. The terminal device 200 may be provided with at least one microphone 270C. The headphone jack 270D is used to connect a wired headphone. The headphone jack 270D may be a USB interface 230, or may be a 3.5 mm open mobile terminal platform (OMTP) standard interface, or a cellular telecommunications industry association of the USA (CTIA) standard interface.

[0048] The keys 290 include a power-on key, volume keys, etc. The keys 290 may be mechanical keys or touch keys. The terminal device 200 can receive key inputs and generate key signal inputs related to the user settings and function controls of the terminal device 200. The motor 291 can generate a vibration prompt. The motor 291 can be used for incoming call vibration prompts or for touch vibration feedback. The indicator 292 may be an indicator light and can be used to indicate the charging state, battery level change, or can also be used to indicate messages, missed calls, notifications, etc. The SIM card interface 295 is used to connect a SIM card. The SIM card can be brought into contact with and separated from the terminal device 200 by inserting or removing it from the SIM card interface 295. The terminal device 200 may support 1 or N SIM card interfaces, where N is a positive integer greater than 1. The SIM card interface 295 can support Nano SIM cards, Micro SIM cards, SIM cards, etc. In some embodiments, the terminal device 200 uses an embedded SIM (eSIM) card, and the eSIM card can be embedded in the terminal device 200 and cannot be separated from the terminal device 200.

[0049] The touch component 294 includes a touch screen and a touch chip. The touch screen includes a display panel for displaying images, videos, etc. The touch screen may also include a touch circuit for receiving user touch operations. The touch chip is used to output a periodic driving signal to the touch screen and receive a detection signal from the touch screen. When the user performs a touch operation on the touch screen, the detection signal changes. In some embodiments, the terminal device 200 may include one or more touch components 294. In other embodiments, the touch screen in the touch component 294 may be a foldable screen.

[0050] Exemplarily, as Figure 2 and Figure 3 shown, the display panel of the touch screen may include a first touch area 31 and a second touch area 32. When the touch screen is folded, the first touch area 31 and the second touch area 32 may be located in different planes. Among them, Figure 2 the touch screen in Figure 3 is folded outwards, so that after folding, the first touch area 31 and the second touch area 32 are visible to the user, and the user can still perform touch operations on the touch screen. Figure 2 The touch screen in Figure 3 is folded inwards, so that after complete folding, the first touch area 31 and the second touch area 32 face each other, which is beneficial to protecting the display panel of the touch screen. The touch screen provided by the embodiments of the present application may be

[0051] As Figure 4 shown, taking the touch screen as a capacitive screen as an example, the touch circuit of the touch screen includes a plurality of driving (DRV) electrodes 41 and a plurality of sensing (SEN) electrodes 42. The plurality of driving electrodes 41 and the plurality of sensing electrodes 42 are cross-distributed, and there is no electrical connection between the plurality of driving electrodes 41 and the plurality of sensing electrodes 42, so that a capacitive touch point 43 is formed at each intersection. The plurality of driving electrodes 41 respectively input periodic driving signals (such as sine waves or square waves) from the touch chip. Different driving electrodes 41 inputting driving signals is equivalent to scanning the position of the touch operation on the horizontal axis coordinate. Since the human body is a good conductor, when the user's finger clicks on a certain position of the touch screen (i.e., a touch operation is generated), the finger will form a coupling capacitance with the touch screen, thereby changing the capacitance value of the touch point 43 at that position. The detection signal (voltage or current) output by the detection electrode 42 corresponding to the touch point 43 to the touch chip changes accordingly, which is equivalent to determining the position of the touch operation on the vertical axis coordinate. That is, the horizontal and vertical coordinates of the touch operation are identified by the change in the capacitance value of the touch point 43.

[0052] When Figure 2After the outwardly foldable touch screen shown is folded, the display panel on one side may not display content, but the touch area on that side (such as the second touch area 32) is still in an active state, and the detection electrode will still detect the noise in this touch area, and the operations of the palm or finger in this touch area also become noise. In addition, as the size of the touch screen continues to increase, the length of the detection electrode increases, resulting in a multiple increase in the noise output by the detection electrode of the touch screen, reducing the signal-to-noise ratio (the ratio of the effective signal to the noise) of the touch screen, thus affecting the touch performance of the touch screen and possibly causing mis-touch operations.

[0053] Therefore, in the embodiments of the present application, the touch circuit in the touch screen is divided into multiple touch circuits, and each touch circuit includes an independent drive electrode and a detection electrode, reducing the length of the drive electrode in a single touch circuit, thereby reducing the noise output by the detection electrode of the touch screen.

[0054] As Figure 5 and Figure 6 shown, the touch component provided by the embodiments of the present application includes a touch screen 51 and a touch chip 52.

[0055] Among them, the touch screen 51 includes a display panel (not shown in the figure) and N touch circuits 511, where N is an integer greater than 1. The display panel includes N touch areas, and each touch circuit 511 is located in one touch area. Each touch circuit 511 includes multiple drive electrodes 5111 and multiple detection electrodes 5112. The number of drive electrodes 5111 included in different touch circuits 511 may be the same or different, and the number of detection electrodes 5112 included in different touch circuits 511 may be the same or different. In the embodiments of the present application, taking the touch circuit 511 including b drive electrodes 5111 (such as DRV11 - DRV1b, DRVn1 - DRVnb, DRVN1 - DRVNb) and a detection electrodes 5112 (such as SEN11 - SEN1a, SENn1 - SENna, SENN1 - SENNa) as an example, but it is not intended to be limited thereto. 1 ≤ n ≤ N, and n is an integer, and a and b are positive integers.

[0056] In each touch circuit 511, a plurality of driving electrodes 5111 and a plurality of detecting electrodes 5112 are cross-distributed in the touch area where they are located without electrical connection, so that touch points in the form of capacitors are formed at each intersection point. In the embodiments of the present application, the plurality of driving electrodes 5111 are arranged along the horizontal axis, and the plurality of detecting electrodes 5112 are arranged along the vertical axis. However, it is not intended to be limited thereto. The plurality of driving electrodes 5111 may also be arranged along the vertical axis, and the plurality of detecting electrodes 5112 may also be arranged along the horizontal axis. The plurality of driving electrodes 5111 belonging to different touch circuits 511 are not electrically connected and are independently electrically connected to the touch chip 52, so that the plurality of driving electrodes 5111 belonging to different touch circuits 511 are electrically isolated from each other. The detecting electrodes 5112 belonging to different touch circuits 511 are not electrically connected and are independently electrically connected to the touch chip 52, so that the plurality of detecting electrodes 5112 belonging to different touch circuits 511 are electrically isolated from each other. That is, each touch circuit 511 is independent of each other.

[0057] The touch chip 52 includes a control circuit 521, N groups of driving pins 522, N groups of detecting pins 523, and a plurality of analog front end (AFE) circuits 524. The N groups of driving pins 522 are respectively electrically connected to the driving electrodes 5111 of N touch circuits 511 (each group of driving pins 522 is electrically connected to the driving electrodes 5111 of one touch circuit 511), and the N groups of detecting pins 523 are respectively electrically connected to the detecting electrodes 5112 of N touch circuits 511 (each group of detecting pins 523 is electrically connected to the detecting electrodes 5112 of one touch circuit 511). The N groups of detecting pins 523 are also electrically connected to the input ends of the plurality of analog front end circuits 524.

[0058] Optionally, as Figure 6 shown, the touch chip 52 further includes a plurality of selection switches 525. The N groups of detecting pins 523 are electrically connected to the input ends of the plurality of analog front end circuits 524 through the plurality of selection switches 525. Controlled by the control circuit 521, the plurality of selection switches 525 can select a group of detecting pins 523 to be electrically connected to the input ends of the plurality of analog front end circuits 524, so as to realize time-division multiplexing of the analog front end circuits 524, reduce the number of analog front end circuits 524, reduce the cost of the touch chip 52, and reduce the area of the touch chip 52.

[0059] The working principle of the touch screen 51 and the touch chip 52 will be described below.

[0060] The touch screen 51 includes N touch circuits 511. In each detection period, the touch chip 52 outputs a driving signal to one touch circuit 511 and detects the detection signal output by the touch circuit 511. Therefore, a total of N detection periods are required to complete the detection of the touch operation of the entire touch screen 51.

[0061] In the nth (1 ≤ n ≤ N, and n is an integer) detection period, the control circuit 521 of the touch chip 52 outputs periodic drive signals (such as sine waves or square waves) to the multiple drive electrodes 5111 of the nth touch circuit 511 of the touch screen 51 through the nth group of drive pins among the N groups of drive pins 522. The control circuit 521 can output drive signals to the multiple drive electrodes 5111 of the nth touch circuit 511 in turn in a polling manner to scan the position of the touch operation on the horizontal axis coordinate.

[0062] When the user's finger does not click on any position in the touch area where the nth touch circuit 511 is located, the detection signals (voltage or current) output by the multiple detection electrodes 512 of the nth touch circuit 511 to the nth group of detection pins among the N groups of detection pins 523 of the touch chip 52 are the same. Since the human body is a good conductor, when the user's finger clicks on any position in the touch area where the nth touch circuit 511 is located, the finger will form a coupling capacitance with the touch screen, thereby changing the capacitance value of the touch point at that position. The detection signal (voltage or current) output by the detection electrode 512 corresponding to the touch point changes accordingly. The multiple analog front-end circuits 524 of the touch chip 52 perform analog-to-digital conversion on the input detection signals to obtain digital signals. The processor of the terminal device can determine which detection electrode 512 the touch operation corresponds to based on the digital signals, which is equivalent to determining the position of the touch operation on the vertical axis coordinate. Combining with scanning the position of the touch operation on the horizontal axis coordinate, the horizontal and vertical coordinates of the touch operation can be determined.

[0063] Optionally, for Figure 6 the touch chip 52 further includes multiple selection switches 525, in the nth detection period, the control circuit 521 can also control the multiple selection switches 525 to select the nth group of detection pins to be electrically connected to the input ends of the multiple analog front-end circuits 524, so that the multiple analog front-end circuits 524 can perform analog-to-digital conversion on the detection signals input by the nth group of detection pins to obtain digital signals.

[0064] The touch component will be described below by taking a representative touch screen including two touch circuits as an example.

[0065] As Figure 7 and Figure 8As shown in the figure, the touch screen 71 may include a first touch circuit 711 and a second touch circuit 712. The first touch circuit 711 includes a plurality of driving electrodes 7111 (such as DRV11 - DRV1b) and a plurality of detecting electrodes 7112 (such as SEN11 - SEN1a). The second touch circuit 712 includes a plurality of driving electrodes 7121 (such as DRV21 - DRV2b) and a plurality of detecting electrodes 7122 (such as SEN21 - SEN2a). The plurality of detecting electrodes 7111 of the first touch circuit 711 and the plurality of detecting electrodes 7112 of the second touch circuit 712 are independently electrically connected to the touch chip 72; the plurality of driving electrodes 7111 of the first touch circuit 711 and the plurality of driving electrodes 7121 of the second touch circuit 712 are electrically isolated from each other and are independently electrically connected to the touch chip 72.

[0066] The touch chip 72 includes a first set of driving pins 721, a second set of driving pins 722, a first set of detecting pins 723, a second set of detecting pins 724, a control circuit 725, and a plurality of analog front - end circuits 726. The first set of driving pins 721 is electrically connected to the plurality of driving electrodes 7111 of the first touch circuit 711, and the first set of detecting pins 723 is electrically connected to the plurality of detecting electrodes 7112 of the first touch circuit 711; the second set of driving pins 722 is electrically connected to the plurality of driving electrodes 7121 of the second touch circuit 712, and the second set of detecting pins 724 is electrically connected to the plurality of detecting electrodes 7112 of the second touch circuit 712.

[0067] During the first detection period, the touch chip 72 outputs a driving signal to the plurality of driving electrodes 7111 of the first touch circuit 711 through the first set of driving pins 721, and receives a first detection signal from the plurality of detecting electrodes 7112 of the first touch circuit 711 through the first set of detecting pins 723. The first detection signal is used to detect the touch operation in the first touch area where the first touch circuit 711 is located. During the second detection period, the touch chip outputs a driving signal to the plurality of driving electrodes of the second touch circuit through the second set of driving pins 722, and receives a second detection signal from the plurality of detecting electrodes 7112 of the second touch circuit 712 through the second set of detecting pins 724. The second detection signal is used to detect the touch operation in the second touch area where the first touch circuit 711 is located.

[0068] The plurality of analog front - end circuits 726 are used to perform analog - to - digital conversion on the first detection signal and / or the second detection signal.

[0069] Optionally, as Figure 8 shown in the figure, the touch chip 72 further includes a plurality of selection switches 727. The control circuit 725 controls the plurality of selection switches 727 to select the first set of detecting pins or the second set of detecting pins to be electrically connected to the input ends of the plurality of analog front - end circuits.

[0070] AsFigure 9 As shown in the figure, the first touch circuit 711 may be located in the first touch area 73 of the display panel of the touch screen, and the second touch circuit 712 is located in the second touch area 74 of the display panel of the touch screen. In particular, when the touch screen is a foldable screen folded along the fold line 75, the first touch area 73 and the second touch area 74 may be located on both sides of the fold line 75, that is, the first touch circuit 711 and the second touch circuit 712 may be located on both sides of the fold line 75.

[0071] After the touch screen is folded, when the first touch circuit 711 detects a user's touch operation in the first touch area 73, the second touch circuit 712 may be in an inoperative state, that is, the second touch circuit 712 does not detect a user's touch operation in the second touch area 74, and operations of the palm or finger in the second touch area 74 will not become noise. Therefore, the noise output by the touch screen can be reduced.

[0072] The touch component provided by the embodiment of the present application is not only applicable to large and medium-sized touch screens (such as touch screens of tablet computers, notebook computers, etc.) and foldable screens (such as touch screens of foldable mobile phones), but also has a low manufacturing cost. And because the touch circuit is divided into multiple ones, each touch circuit has an independent detection electrode and drive electrode, the length of the detection electrode in a single touch circuit is reduced, and the load of the detection electrode and the generated noise are reduced by several times, so that the signal-to-noise ratio (the ratio of the effective signal to the noise) of the touch screen is greatly improved, thereby improving the touch performance of the touch screen.

[0073] The processor involved in the embodiment of the present application may be a chip. For example, it may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processing circuit (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0074] The memory involved in the embodiments of this application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include but not be limited to these and any other suitable types of memory.

[0075] Those of ordinary skill in the art can realize that the modules and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. A professional technician can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0076] In several embodiments provided by this application, the division of the modules is only a logical function division. In actual implementation, there can be other division methods. For example, multiple modules or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of devices or modules can be in electrical, mechanical, or other forms.

[0077] The module described as a separation component may or may not be physically separated. The component shown as a module may or may not be a physical module, that is, it may be located in one device or distributed to multiple devices. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0078] In addition, in each embodiment of the present application, each functional module can be integrated in one device, or each module can exist physically alone, or two or more modules can be integrated in one device.

[0079] As mentioned above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A touch component, characterized in that, Comprising: A touch screen and a touch chip, the touch screen includes a display panel, a first touch circuit and a second touch circuit, the first touch circuit is located in a first touch area of the display panel, and the second touch circuit is located in a second touch area of the display panel; the first touch circuit includes a plurality of driving electrodes and a plurality of detecting electrodes, and the second touch circuit includes a plurality of driving electrodes and a plurality of detecting electrodes; The plurality of detecting electrodes of the first touch circuit are electrically isolated from the plurality of detecting electrodes of the second touch circuit, and are independently electrically connected to the touch chip; the plurality of driving electrodes of the first touch circuit are electrically isolated from the plurality of driving electrodes of the second touch circuit, and are independently electrically connected to the touch chip; The touch chip is configured to output a driving signal to the plurality of driving electrodes of the first touch circuit, and receive a first detection signal from the plurality of detecting electrodes of the first touch circuit, and the first detection signal is used to detect a touch operation on the first touch area; The touch chip is further configured to output a driving signal to the plurality of driving electrodes of the second touch circuit, and receive a second detection signal from the plurality of detecting electrodes of the second touch circuit, and the second detection signal is used to detect a touch operation on the second touch area; The touch screen is a foldable screen folded along a folding line, and the first touch area and the second touch area are located on both sides of the folding line; After the touch screen is folded, when the first touch circuit detects a touch operation of a user in the first touch area, the second touch circuit is in a disabled state.

2. The touch control component according to claim 1, wherein The touch chip includes a first set of driving pins, a second set of driving pins, a first set of detecting pins, a second set of detecting pins, a control circuit and a plurality of analog front-end circuits; The first set of driving pins are electrically connected to the plurality of driving electrodes of the first touch circuit, and the first set of detecting pins are electrically connected to the plurality of detecting electrodes of the first touch circuit; the second set of driving pins are electrically connected to the plurality of driving electrodes of the second touch circuit, and the second set of detecting pins are electrically connected to the plurality of detecting electrodes of the second touch circuit; The control circuit is configured to output a driving signal to the plurality of driving electrodes of the first touch circuit through the first set of driving pins, and receive the first detection signal from the plurality of detecting electrodes of the first touch circuit through the first set of detecting pins; The control circuit is further configured to output a driving signal to the plurality of driving electrodes of the second touch circuit through the second set of driving pins, and receive the second detection signal from the plurality of detecting electrodes of the second touch circuit through the second set of detecting pins; The plurality of analog front-end circuits are configured to perform analog-to-digital conversion on the first detection signal and / or the second detection signal.

3. The touch component according to claim 2, characterized in that, The touch chip further includes a plurality of selection switches, and the control circuit is further configured to: Control the plurality of selection switches to select the first set of detecting pins or the second set of detecting pins to be electrically connected to the input end of the plurality of analog front-end circuits.

4. A touch chip, characterized in that, Comprising: A first set of driving pins, a second set of driving pins, a first set of detecting pins, a second set of detecting pins, a control circuit, and a plurality of analog front-end circuits: The first set of driving pins is used for electrically connecting to a plurality of driving electrodes of a first touch circuit of the touch screen, and the first set of detecting pins is used for electrically connecting to a plurality of detecting electrodes of the first touch circuit; the second set of driving pins is used for electrically connecting to a plurality of driving electrodes of a second touch circuit of the touch screen, and the second set of detecting pins is used for electrically connecting to a plurality of detecting electrodes of the second touch circuit; there is electrical isolation between the plurality of detecting electrodes of the first touch circuit and the plurality of detecting electrodes of the second touch circuit, and there is electrical isolation between the plurality of driving electrodes of the first touch circuit and the plurality of driving electrodes of the second touch circuit; The control circuit is used for outputting a driving signal to the plurality of driving electrodes of the first touch circuit through the first set of driving pins, and receiving a first detection signal from the plurality of detecting electrodes of the first touch circuit through the first set of detecting pins; The control circuit is further used for outputting a driving signal to the plurality of driving electrodes of the second touch circuit through the second set of driving pins, and receiving a second detection signal from the plurality of detecting electrodes of the second touch circuit through the second set of detecting pins; The plurality of analog front-end circuits are used for performing analog-to-digital conversion on the first detection signal and / or the second detection signal; The touch screen is a foldable screen folded along a folding line, and the first touch circuit and the second touch circuit are located on both sides of the folding line; After the touch screen is folded, when the first touch circuit detects a user's touch operation in the first touch area, the second touch circuit is in a failure state.

5. The touch chip according to claim 4, characterized in that, The touch chip further includes a plurality of selection switches, and the control circuit is used for: Controlling the plurality of selection switches to select the first set of detecting pins or the second set of detecting pins to be electrically connected to the input ends of the plurality of analog front-end circuits.

6. A terminal device, characterized in that, Comprising the touch component according to any one of claims 1-3.

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