Touch apparatus, touch chip, display screen module, and electronic device

Abstract

A touch apparatus, a touch chip, a display screen module, and an electronic device. The touch apparatus comprises a touch chip and a touch module. The touch chip is used for outputting a first driving signal to the touch module. The touch module is used for receiving the first driving signal. During a touch operation by a finger, the touch module, the finger, a human body, and electrodes on a touch screen form a closed loop. The touch module transmits the first driving signal to the closed loop by means of the human body and the finger in sequence, thereby generating a sensing signal in the closed loop. The touch chip performs touch position recognition on the basis of the sensing signal. The touch apparatus can be suitable for performing touch position recognition in underwater scenarios, and has high applicability.

Description

Touch devices, touch chips, display screen modules and electronic devices

[0001] This application claims priority to the invention application filed on May 30, 2024, with application number "PCT / CN2024 / 096492" and patent title "Touch Device, Touch Chip, Display Screen Module and Electronic Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of electrical engineering technology, and in particular to a touch device, a touch chip, a display screen module, and an electronic device. Background Technology

[0003] With the development of technology, electronic devices have become more integrated, and more and more electronic devices support IP6X waterproof rating. There are many scenarios that require the use of electronic devices underwater, such as using mobile phones, touchpads and other electronic devices that require touch control of the display screen underwater.

[0004] Currently, the touch devices included in the display screens of electronic devices use self-capacitance and / or mutual capacitance of electrodes to recognize touch commands.

[0005] However, because the self-capacitance and / or mutual capacitance of the electrodes are sensitive to water when recognizing touch commands, they cannot recognize finger touch commands when the display screen is covered by water, making existing electronic devices unusable underwater.

[0006] Summary of the Invention

[0007] In view of this, embodiments of this application provide a touch device, a touch chip, a display screen module, and an electronic device to at least partially solve the above-mentioned problems.

[0008] According to a first aspect of the present application, a touch device is provided, comprising: a touch chip and a touch module, wherein the touch chip is configured to output a first driving signal to the touch module; the touch module is configured to receive the first driving signal, wherein when a finger performs a touch operation, the touch module, the finger, the human body, and electrodes on the touch screen form a closed loop, the touch module sequentially transmits the first driving signal to the closed loop through the human body and the finger to generate a sensing signal in the closed loop, and the touch chip performs touch position recognition based on the sensing signal.

[0009] According to a second aspect of the present application, a touch chip is provided, wherein the touch chip is used to output a first driving signal to a touch module, and the touch module responds to the first driving signal, and when a finger touches the screen, the touch module, the finger, the human body and the electrodes on the touch screen form a closed loop, the touch module sequentially transmits the first driving signal to the closed loop through the human body and the finger, and the sensing signal generated in the closed loop is used for touch position recognition.

[0010] According to a third aspect of the present application, a display screen module is provided, including electrodes and a touch device as described in the first aspect of the present application; when a finger touches the screen, the electrodes form a closed loop with the touch module, the human body and the finger, wherein the electrodes include horizontal electrodes and / or vertical electrodes arranged on the touch screen.

[0011] According to a fourth aspect of the present application, an electronic device is provided, including a processor and a display screen module as described in the second aspect of the present application; the processor is electrically connected to the display screen module; the processor is configured to send a switching signal to the touch device, so that the touch chip in the touch device outputs a first driving signal to the touch module or outputs a second driving signal to the electrode.

[0012] According to a fifth aspect of the present application, a touch device is provided for use in a mobile phone. The touch device includes a touch chip and a touch module. The touch module includes metal buttons and / or a metal casing of the mobile phone. The touch chip is configured to output a first driving signal to the touch module. The touch module is configured to receive the first driving signal and, when a finger touches the screen, transmit the first driving signal to the finger through a human body in contact with the touch module, so that the finger senses electrodes on the touch screen to generate a sensing signal. The touch chip identifies the touch position based on the sensing signal.

[0013] According to a sixth aspect of the present application, a touch control device is provided for use in a wearable device. The touch control device includes a touch chip and a touch module. The touch module includes a metal casing and / or metal electrodes of the wearable device. The touch chip is configured to output a first driving signal to the touch module. The touch module is configured to receive the first driving signal and, when a finger touches the screen, transmit the first driving signal to the finger through a human body in contact with the touch module, so that the finger senses the electrodes on the touch screen to generate a sensing signal. The touch chip identifies the touch position based on the sensing signal.

[0014] According to the touch device provided in the embodiments of this application, the touch chip outputs a first driving signal to the touch module, and the touch module receives the first driving signal. When a finger touches the screen, the touch module, the human body, the finger, and the electrodes form a closed loop, which can generate a sensing signal within the closed loop. Thus, the touch chip can identify the touch position based on the sensing signal. Since the sensing signal is generated by the different conductivity between water and the human body, and the different equivalent capacitance between water and the electrodes and between the finger and the electrodes, the sensing signal is generated. Therefore, compared with the prior art of touch position identification through electrode self-capacitance or mutual capacitance, this touch device can be applied to touch position identification in underwater environments. Therefore, this touch device can be applied to touch position identification in a variety of usage scenarios and has high applicability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 is a schematic diagram of a touch device provided in an embodiment of this application;

[0017] Figure 2 is a schematic diagram of a touch device in conventional mode provided in an embodiment of this application;

[0018] Figure 3 is a schematic diagram of a touch chip provided in an embodiment of this application;

[0019] Figure 4 is a schematic diagram of a touch device including a signal amplification module provided in an embodiment of this application;

[0020] Figure 5 is a schematic diagram of a touch module provided in an embodiment of this application;

[0021] Figure 6 is a schematic diagram of an equivalent circuit provided in an embodiment of this application;

[0022] Figure 7 is a schematic diagram of a signal detection timing provided in an embodiment of this application;

[0023] Figure 8 is a schematic diagram of another touch chip provided in an embodiment of this application;

[0024] Figure 9 is a circuit diagram of a current conversion unit provided in an embodiment of this application;

[0025] Figure 10 is a circuit diagram of another current conversion unit provided in an embodiment of this application;

[0026] Figure 11 is a circuit diagram of another current conversion unit provided in an embodiment of this application;

[0027] Figure 12 is a circuit diagram of another current conversion unit provided in an embodiment of this application;

[0028] Figure 13 is a schematic diagram of a display screen module provided in an embodiment of this application;

[0029] Figure 14 is a schematic diagram of an electronic device provided in an embodiment of this application;

[0030] Figure 15 is a schematic diagram of the switching principle of an electronic device provided in an embodiment of this application. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of this application.

[0032] As mentioned earlier, with the development of technology, electronic devices have become increasingly integrated, and more and more electronic devices support IP6X waterproofing. Many scenarios require the use of electronic devices underwater, such as using mobile phones, touchpads, and other devices that require touch control of the display screen. Currently, the touch devices included in the display screens of electronic devices use self-capacitance and / or mutual capacitance electrodes to recognize touch commands. However, because self-capacitance and / or mutual capacitance electrodes are quite sensitive to water when recognizing touch commands, they cannot recognize finger touch commands when the display screen is covered by water, rendering existing electronic devices unusable underwater.

[0033] This application provides a touch control device. A touch chip outputs a first driving signal to a touch module, which receives the first driving signal. When a finger touches the screen, the touch module, the human body, the finger, and the electrodes form a closed loop, generating a sensing signal within the closed loop. The touch chip can then identify the touch position based on the sensing signal. Since the sensing signal is generated by the difference in conductivity between water and the human body, and the difference in equivalent capacitance between water and the electrodes compared to the difference in equivalent capacitance between the finger and the electrodes, this touch device is suitable for underwater touch position identification compared to existing technologies that rely on electrode self-capacitance or mutual capacitance. Therefore, this touch device is applicable to touch position identification in various usage scenarios and has high applicability.

[0034] The touch device provided in this application is described below through embodiments.

[0035] Figure 1 is a schematic diagram of a touch device provided in an embodiment of this application. As shown in Figure 1, the touch device 100 includes a touch chip 101 and a touch module 102. The touch chip 101 can output a first driving signal to the touch module 102, and the touch module 102 can receive the first driving signal. When a finger touches the screen, the touch module 102, the finger, the human body, and the electrodes 401 on the touch screen form a closed loop. The touch module 102 transmits the first driving signal to the closed loop in sequence through the human body and the finger to generate a sensing signal in the closed loop. The touch chip 101 identifies the touch position based on the sensing signal.

[0036] The touch device 100 includes a touch chip 101 and a touch module 102. The touch chip 101 can be electrically connected to the touch module 102. The touch chip 101 can output a first driving signal to the touch module 102. In one example, the first driving signal can be a voltage signal, a sine wave signal, a square wave signal, a trapezoidal wave signal, etc.

[0037] The touch module 102 can receive the first driving signal. When a finger touches the touch screen, the finger, the touch module 102, the human body, and the electrode 401 form a closed loop. Specifically, the human body and the touch module 102 are in contact, the human body can conduct electricity equivalent to an equivalent resistance, and there is an equivalent capacitance between the finger and the electrode 401. Thus, the touch module 102, the human body in contact with the touch module 102, the finger, the equivalent capacitance between the finger and the electrode 401, and the electrode 401 form a closed loop. Since the touch module 102 receives the first driving signal, it can transmit the first driving signal to the closed loop in sequence through the human body and the finger. For example, when the left hand holds the electronic device and touches it with the fingers of the right hand, the left hand is in contact with the touch module 102, the first driving signal flows through the left hand to the human body, and then through the fingers of the right hand to transmit the first driving signal to the closed loop. An induction signal can be generated in the closed loop. Specifically, when in an underwater environment, there is contact between water and the touch module 102, and there is an equivalent capacitance between water and the electrode 401. Therefore, the touch module 102, water, and electrode 401 form a closed loop. When a finger touches the screen, the signal in the electrode 401 changes due to the difference between the conductivity of water and the conductivity of the human body, and the difference between the equivalent capacitance between water and electrode 401 and the equivalent capacitance between the finger and electrode 401, thus forming an inductive signal.

[0038] It should be noted that since the first driving signal output by the touch chip 101 needs to pass through the human body and fingers in sequence, and the human body and fingers are equivalent to a large resistance, the signal amplitude of the first driving signal transmitted in the closed loop is smaller than the signal amplitude of the first driving signal output by the touch chip 101, but it will not change the waveform of the signal.

[0039] The touch chip 101 is electrically connected to the electrode 401. After receiving the sensing signal transmitted by the electrode 401, the touch chip 101 can identify the touch position based on the sensing signal. In one example, the touch chip 101 can convert the sensing signal into a digital signal and send the digital signal to the processor of the electronic device, thereby realizing touch position recognition.

[0040] In this embodiment, the touch chip 101 outputs a first driving signal to the touch module 102, and the touch module 102 receives the first driving signal. When the finger touches the screen, the touch module 102, the human body, the finger, and the electrode 401 form a closed loop, which can generate a sensing signal. Thus, the touch chip 101 can identify the touch position based on the sensing signal. Since the sensing signal is generated by the different conductivity between water and the human body, and the difference between the equivalent capacitance between water and the electrode 401 and the equivalent capacitance between the finger and the electrode 401, the sensing signal is generated. Therefore, compared with the prior art of touch position identification through the self-capacitance or mutual capacitance of the electrode 401, this touch device 100 can be applied to touch position identification in underwater environments. Therefore, this touch device 100 can be applied to touch position identification in a variety of usage scenarios and has high applicability.

[0041] Figure 2 is a schematic diagram of a touch device in conventional mode provided in an embodiment of this application. As shown in Figure 2, when the touch chip 101 receives a switching signal from the processor in the electronic device, the touch chip 101 stops outputting the first driving signal to the touch module 102, and the touch chip 101 sends a second driving signal to the electrode 401, and performs position recognition based on the touch signal output by the electrode 401. The electrode 401 includes multiple horizontal electrodes and / or multiple vertical electrodes.

[0042] When the touch chip 101 receives the switching signal from the processor, it switches from underwater touch mode to regular touch mode. The touch chip 101 stops outputting the first driving signal, and the touch module 102 stops sensing. The touch chip 101 then outputs a second driving signal to the electrode 401. This second driving signal can be a sine wave, square wave, trapezoidal wave, etc. When the electrode 401 receives the second driving signal, it generates a sensing signal, and the touch chip 101 identifies the touch position based on this signal.

[0043] It should be understood that, as shown in Figure 2, the multiple electrodes 401 include multiple horizontal electrodes and / or multiple vertical electrodes. The touch chip 101 is electrically connected to each electrode 401. When the multiple horizontal electrodes and / or multiple vertical electrodes generate sensing signals, the touch chip 101 can detect the sensing signals generated in the multiple horizontal electrodes and / or multiple vertical electrodes.

[0044] In this embodiment, when the touch chip 101 receives a switching signal, the touch chip 101 stops outputting the first driving signal and outputs the second driving signal to the electrode 401. This makes it suitable for touch position recognition in everyday use scenarios. Since the regular touch mode and underwater touch mode are switched according to the switching signal, it is suitable for touch position recognition in both everyday and underwater scenarios. It is applicable to touch position recognition in a variety of use scenarios and has high applicability.

[0045] In one possible implementation, when the electronic device is in underwater mode, the touch chip 101 outputs a first driving signal to the touch module 102, and when the electronic device is in non-underwater mode, the touch chip 101 sends a second driving signal to the electrode 401.

[0046] When the electronic device is in underwater mode, the touch chip 101 outputs a first driving signal, and the touch module 102 receives the first driving signal. When a finger touches the touch screen, the finger, touch module 102, human body, and electrode 401 form a closed loop. Specifically, the human body and touch module 102 are in contact, and the human body can conduct electricity, which is equivalent to an equivalent resistance. There is an equivalent capacitance between the finger and electrode 401. Thus, the touch module 102, the human body in contact with the touch module 102, the finger, the equivalent capacitance between the finger and electrode 401, and electrode 401 form a closed loop. Block 102 receives the first driving signal, and can then transmit the first driving signal to the closed loop sequentially through the human body and the finger. Since the water and the touch module 102 are in contact when the finger is not touching, and there is an equivalent capacitance between the water and the electrode 401, the touch module 102, the water, and the electrode 401 form a closed loop. When the finger touches, the conductivity of the water is different from that of the human body, and the equivalent capacitance between the water and the electrode 401 is different from that between the finger and the electrode 401, thus causing a change in the signal in the electrode 401, forming an induction signal.

[0047] When the electronic device is in non-underwater mode, the touch chip 101 stops outputting the first driving signal. At this time, the touch module 102 cannot receive the first driving signal, and the touch module 102 stops sensing. Then, the touch chip 101 outputs a second driving signal to the electrode 401. The second driving signal can be a sine wave, a square wave, or a trapezoidal wave, etc. When the electrode 401 receives the second driving signal, it generates a sensing signal, and the touch chip 101 identifies the touch position based on the sensing signal.

[0048] In one example, the underwater mode and the non-underwater mode can be switched by clicking the mode switching button displayed on the display screen of the electronic device. Specifically, after clicking the mode switching button displayed on the display screen, the processor of the electronic device sends a switching signal to the touch chip 101 to realize the switching between the underwater mode and the non-underwater mode.

[0049] In this embodiment, when the electronic device is in underwater mode, the touch chip 101 outputs a first driving signal. When the electronic device is in non-underwater mode, the touch module 101 sends a second driving signal to the electrode 401. Thus, the electronic device can switch between underwater and non-underwater modes. Therefore, this touch device is applicable to touch position recognition in both daily and underwater scenarios, and can be used for touch position recognition in various usage scenarios, making it highly adaptable.

[0050] In one possible implementation, the touch chip 101 sends a second drive signal to one of a plurality of horizontal electrodes and a plurality of vertical electrodes, and performs position recognition based on the touch signal output by the other of the plurality of horizontal electrodes and the plurality of vertical electrodes.

[0051] One of the multiple horizontal electrodes and multiple vertical electrodes serves as the driving electrode. The touch chip 101 outputs a driving signal to the driving electrode. The other of the multiple horizontal electrodes and multiple vertical electrodes serves as the receiving electrode and outputs a sensing signal. The touch chip 101 performs touch recognition based on the sensing signal and can identify the touch position of the finger. This method is a mutual capacitance detection method.

[0052] In addition, in another possible implementation, a self-capacitance detection method can be superimposed to identify the touch position of the finger. At least one of the multiple horizontal electrodes and multiple vertical electrodes serves as both a driving electrode and a receiving electrode. The touch chip 101 sends a driving signal to the driving electrode and performs position identification based on the sensing signal output by the receiving electrode. For example, the touch chip 101 outputs driving signals to multiple horizontal electrodes (driving electrodes) and simultaneously receives the sensing signals output by the multiple horizontal electrodes (receiving electrodes); or the touch chip 101 outputs driving signals to multiple vertical electrodes (driving electrodes) and simultaneously receives the sensing signals output by the multiple vertical electrodes (receiving electrodes); or the touch chip 101 simultaneously outputs driving signals to multiple horizontal electrodes and multiple vertical electrodes and simultaneously receives the sensing signals output by the multiple horizontal electrodes and multiple vertical electrodes. The touch chip 101 performs touch position identification based on the received sensing signals.

[0053] In this embodiment, when the touch chip 101 receives a switching signal, the touch chip stops outputting the first driving signal and outputs the second driving signal to the electrode 401. Thus, the touch position can be identified by the electrode 401 using self-capacitance or mutual capacitance. This is applicable to touch position identification in daily use scenarios. Since the switching signal switches between daily and underwater scenarios, it is applicable to touch position identification in both daily and underwater scenarios. The touch device 100 is applicable to touch position identification in various use scenarios and has high applicability.

[0054] Figure 3 is a schematic diagram of a touch chip provided in an embodiment of this application. As shown in Figure 3, the touch chip 101 includes a first switch K1 and a second switch K2. The first switch K1 is electrically connected to a first pin 1011. One end of the second switch K2 is connected to the first pin 1011, and the other end of the second switch K2 is grounded. When the first switch K1 is closed and the second switch K2 is open, the touch chip 101 outputs a first driving signal to the touch module 102 through the first pin 1011. When the first switch K1 is open and the second switch K2 is closed, the touch chip 101 stops outputting the first driving signal to the touch module 102 and sends a second driving signal to the electrode 401.

[0055] The touch chip 101 includes a first switch K1 and a second switch K2. The first switch K1 is located between the first signal generator 1012 and the first pin 1011. One end of the first pin 1011 is connected to the first switch K1, and the other end of the first pin 1011 is electrically connected to the touch module 102. One end of the second switch K2 is connected to the first pin 1011, and the other end of the second switch K2 is grounded. When the first switch K1 is closed and the second switch K2 is open, the first signal generator 1012 in the touch chip 101 generates a first driving signal and transmits the first driving signal to the first pin 1011 through the closed first switch K1. The first pin 1011 sends the first driving signal to the touch module 102, which is electrically connected to the first pin 1011, thereby enabling touch position recognition in underwater scenarios.

[0056] When the second switch K2 is closed, the touch module 102 is grounded through the first pin 1011 and the closed second switch K2. At this time, the touch module 102 is short-circuited by the ground wire, and the touch chip 101 stops outputting the first drive signal to the touch module 102. It should be understood that when the second switch K2 is closed, in order to prevent the touch chip 101 from leaking current to the ground wire, the first switch K1 will be opened. After the touch chip 101 stops outputting the first drive signal to the touch module 102, it outputs the second drive signal to the electrode 401, so that touch position recognition can be performed in daily scenarios.

[0057] In this embodiment, the touch chip 101 includes a first switch K1 and a second switch K2. When the first switch K1 is closed and the second switch K2 is open, the touch chip 101 outputs a first driving signal to the touch module 102. When the first switch K1 is open and the second switch K2 is closed, the touch chip 101 sends a second driving signal to the electrode 401. This enables switching between underwater touch recognition mode and daily touch recognition mode. Since the touch chip 101 can control the on / off state of the first switch K1 and the second switch K2 according to the switching signal sent by the processor, it can be used for touch position recognition in both daily and underwater scenarios. The touch device 100 can be used for touch position recognition in various usage scenarios and has high applicability.

[0058] Figure 4 is a schematic diagram of a touch device including a signal amplification module provided in an embodiment of this application. As shown in Figure 4, the touch device 100 further includes a signal amplification module 103. The input terminal of the signal amplification module 103 is connected to the first pin 1011, and the output terminal of the signal amplification module 103 is connected to the touch module 102. The signal amplification module 103 can amplify the level of the first driving signal and send the amplified first driving signal to the touch module 102. When a finger touches the screen, the touch module 102 transmits the amplified first driving signal to the closed loop in sequence through the human body and the finger.

[0059] The signal amplification module 103 can amplify the first driving signal output by the touch chip 101. The input terminal of the signal amplification module 103 receives the first driving signal output by the touch chip 101 through the first pin 1011, then amplifies the first driving signal, and sends the amplified first driving signal to the touch module 102. Thus, the touch module 102 transmits the amplified first driving signal to the closed loop through the human body and finger in sequence. That is, the closed loop generates a sensing signal based on the amplified first driving signal.

[0060] In one example, the difference between the peak and trough of the first driving signal before signal amplification is [1Vpp, 10Vpp], that is, the difference between the high level and the low level is between 1Vpp and 10Vpp. The difference between the peak and trough of the first driving signal after signal amplification is [1Vpp, 30Vpp], that is, the difference between the high level and the low level is between 1Vpp and 30Vpp.

[0061] In this embodiment, the touch device 100 also includes a signal amplification module 103, which amplifies the first driving signal output by the touch chip 101, thereby increasing the signal amplitude of the first driving signal. This allows the larger amplitude first driving signal to be transmitted to the closed loop through the human body and fingers, resulting in a larger amplitude of the generated sensing signal and improving the sensitivity of the touch device 100 in recognizing the touch position.

[0062] In one possible implementation, the touch module includes metal buttons and / or a metal casing of a mobile phone, or the touch module includes a metal casing and / or metal electrodes of a wearable device.

[0063] Figure 5 is a schematic diagram of a touch module provided in an embodiment of this application. As shown in Figure 5, (a) shows the metal button 1021 of a mobile phone as a touch module, and (b) shows the metal casing 1022 and / or metal electrode 1023 of a watch as a touch module.

[0064] When underwater, the human body comes into contact with the touch module. For example, in Figure 5(a), the finger touches the metal button 1021 of the mobile phone; in Figure 5(b), a watch is worn on the body, allowing the human body to contact the metal casing 1022 or metal electrode 1023 of the electronic device. In one example, Figure 6 is a schematic diagram of an equivalent circuit provided in an embodiment of this application. As shown in Figure 6, when the finger 301 touches the screen, the touch module 102 contacts the human body 300. The touch module 102, the human body 300, the finger 301, and the electrode 401 form a closed loop. The electrode 401 can be a horizontal electrode and / or a vertical electrode. The equivalent signal source L1 in Figure 6 is the touch module 102. The first driving signal received by the control module 102, where capacitor CHT1 is the equivalent capacitance between finger 301 and electrode 401, is transmitted by the touch module 102 to finger 301 through human body 300. Finger 301 and electrode 401 are mutually capacitive. Due to the different conductivity of water and human body 300, and the difference between the equivalent capacitance between water and electrode 401 and the equivalent capacitance between finger 300 and electrode 401, the signal in the closed loop changes, i.e., a sensing signal is generated. Electrode 401 sends the sensing signal to touch chip 101 through the pins of touch chip 101. Touch chip 101 performs touch position recognition based on the sensing signal.

[0065] Figure 7 is a schematic diagram of a signal detection timing provided in an embodiment of this application. As shown in Figure 7, a first driving signal with a duration of t1 is output to the touch module 102. During the time interval 0-t1, signal detection is performed on the vertical electrode in the electrode 401 to determine the vertical coordinate of the touch position. Then, the first driving signal with a duration of t1 is output to the touch module 102 again. During the time interval from t1 to 2*t1, signal detection is performed on the horizontal electrode in the electrode 401 to determine the horizontal coordinate of the touch position. Thus, the horizontal and vertical coordinates of the touch position can be detected within a time interval of 2*t1, and the touch position can be determined.

[0066] In this embodiment, the touch module 102 includes a metal button of the electronic device and / or a metal casing of the electronic device. Thus, when a finger touches the device, the metal button and / or the metal casing of the electronic device form a closed loop with the human body, the finger, and the electrode 401. The touch module 102 sequentially transmits the first driving signal through the human body and the finger into the closed loop, thereby realizing the identification of the touch position underwater. Since the touch module 102 includes a metal button of the electronic device and / or a metal casing of the electronic device, there is no need to set up an additional touch module, thus reducing costs.

[0067] Figure 8 is a schematic diagram of another touch chip provided in an embodiment of this application. As shown in Figure 8, the touch chip 101 includes a current conversion unit 1013 and a processing unit 1014. The current conversion unit 1013 can generate an identification signal according to the sensing signal, and the processing unit 1014 can identify the touch position according to the identification signal.

[0068] In this embodiment of the application, the touch chip 101 includes a current conversion unit 1013 and a processing unit 1014. The current conversion unit 1013 can receive the sensing signal and convert the sensing signal into an identification signal. The processing unit 1014 can identify the touch position based on the identification signal, thereby realizing the identification of the touch position.

[0069] Figure 9 is a circuit diagram of a current conversion unit provided in an embodiment of this application. As shown in Figure 9, the current conversion unit 1013 includes a transimpedance amplifier D1, a first resistor R1, a second resistor R2, a first feedback resistor Rf1, a second feedback resistor Rf2, a first capacitor C1, a second capacitor C2, and an analog-to-digital converter 10131. The first end of the first resistor R1 is connected to an electrode, and the second end of the first resistor R1 is connected to the positive input terminal of the transimpedance amplifier D1. The first end of the second resistor R2 is connected to a reference voltage VCMI, and the second end of the second resistor R2 is connected to the negative input terminal of the transimpedance amplifier D1. The negative output terminal of the transimpedance amplifier D1 is connected to the first input terminal of the analog-to-digital converter 10131, and the positive output terminal of the transimpedance amplifier D1 is connected to the second input terminal of the analog-to-digital converter 10131. The first feedback resistor Rf1 is connected to the first feedback resistor Rf2. The first terminal of capacitor C1 is connected to the positive input terminal of transimpedance amplifier D1. The second terminal of the first feedback resistor Rf1 is connected to the negative output terminal of transimpedance amplifier D1. The first terminal of the second feedback resistor Rf2 is connected to the negative input terminal of transimpedance amplifier D1. The second terminal of the second feedback resistor Rf2 is connected to the positive output terminal of transimpedance amplifier D1. The first terminal of the first capacitor C1 is connected to the first terminal of the first feedback resistor Rf1. The second terminal of the first capacitor C1 is connected to the second terminal of the first feedback resistor Rf1. The first terminal of the second capacitor C2 is connected to the first terminal of the second feedback resistor Rf2. The second terminal of the second capacitor C2 is connected to the second terminal of the second feedback resistor Rf2. Transimpedance amplifier D1 can convert the induced signal into an identification voltage. Analog-to-digital converter 10131 can receive the identification voltage and convert the identification voltage into an identification signal.

[0070] In one example, the induced signal is a current signal. The identified current can be converted into a square wave signal through the feedback resistor, capacitor and transimpedance amplifier D1. Specifically, the identified current is applied to the feedback resistor. The transimpedance amplifier D1 identifies the voltage across the feedback resistor and compares it with the reference voltage VCMI to generate a square wave signal. The square wave signal output by the transimpedance amplifier D1 can be converted into a digital signal through the analog-to-digital converter 10131.

[0071] In this embodiment, the transimpedance amplifier D1 can amplify the identification current and convert the induced signal into an identification voltage. The analog-to-digital converter 10131 can convert the identification voltage into a digital signal, thereby converting the identification current into an identification signal. This allows the processor to identify touch commands based on the identification signal, thus achieving touch recognition.

[0072] Figure 10 is a circuit diagram of another current conversion unit provided in an embodiment of this application. As shown in Figure 10, the current conversion unit 1013 further includes a low-pass filter 10132. The first input terminal of the low-pass filter 10132 is connected to the negative output terminal of the transimpedance amplifier D1, the second input terminal of the low-pass filter 10132 is connected to the positive output terminal of the transimpedance amplifier D1, the first output terminal of the low-pass filter 10132 is connected to the first input terminal of the analog-to-digital converter 10131, and the second output terminal of the low-pass filter 10132 is connected to the second input terminal of the analog-to-digital converter 10131. The low-pass filter 10132 can perform low-pass filtering on the identification voltage to reduce external signal interference in the identification voltage.

[0073] In this embodiment, the current conversion unit 1013 further includes a low-pass filter 10132, which can perform low-pass filtering on the recognition voltage to reduce external signal interference in the recognition voltage, such as filtering out out-of-band signal interference or signal noise. At the same time, it can also prevent the Nyquist aliasing effect, improve the signal-to-noise ratio of the recognition voltage input to the analog-to-digital converter 10131, and reduce the recognition signal corresponding to external signal interference in the recognition signal converted by the analog-to-digital converter 10131, thereby reducing the impact of external signal interference on touch recognition and improving the accuracy of touch recognition.

[0074] Figure 11 is a circuit diagram of another current conversion unit provided in an embodiment of this application. As shown in Figure 11, the current conversion unit 1013 further includes a sample-and-hold module 10133. The sample-and-hold module 10133 includes a third switch K3, a fourth switch K4, a fifth switch K5, a sixth switch K6, a third capacitor C3, and a fourth capacitor C4. The first end of the third switch K3 is connected to the first output end of the low-pass filter 10132. The second end of the third switch K3 is connected to both the first end of the third capacitor C3 and the first end of the fourth switch K4. The second end of the fourth switch K4 is connected to the first input end of the analog-to-digital converter 10131. The second end of the third capacitor C3 is grounded. The first end of the fifth switch K5 is connected to the second output end of the low-pass filter 10132. The second end of the fifth switch K5 is connected to both the first end of the fourth capacitor C4 and the first end of the sixth switch K6. The second end of the sixth switch K6 is connected to the second input end of the analog-to-digital converter 10131. The second end of the fourth capacitor C4 is grounded. The sample-and-hold module 10133 can maintain the identification voltage.

[0075] Since the induced signal is a changing signal, the identification voltage output by the transimpedance amplifier D1, i.e., the square wave signal, is also a changing square wave signal. To ensure that all signals input to the analog-to-digital converter 10131 are converted into identification signals, a sample-and-hold circuit is provided. This circuit can temporarily store the subsequent identification voltage while the analog-to-digital converter 10131 is performing digital-to-analog conversion, preventing the analog-to-digital converter 10131 from missing part of the identification voltage due to changes in the identification voltage. Specifically, when the analog-to-digital converter 10131 is performing digital-to-analog conversion, the fourth switch K4 and / or the sixth switch K6 can be opened, and the identification voltage can be temporarily stored through the third capacitor C3 and the fourth capacitor C4. When the analog-to-digital converter 10131 is idle, the third switch K3 and / or the fifth switch K5 can be opened, and the fourth switch K4 and / or the sixth switch K6 can be closed, so that the analog-to-digital converter 10131 receives the identification voltage temporarily stored in the capacitor. The sample-and-hold effect is achieved through the third switch K3, the fourth switch K4, the fifth switch K5, the sixth switch K6, the third capacitor C3, and the fourth capacitor C4.

[0076] In this embodiment, the current conversion unit 1013 further includes a sample-and-hold module 10133. The sample-and-hold module 10133 can sample and hold the recognition voltage output by the transimpedance amplifier D1 through the third switch K3, the fourth switch K4, the fifth switch K5, the sixth switch K6, the third capacitor C3, and the fourth capacitor C4. This can prevent the recognition voltage from changing due to changes in the sensing signal, thus avoiding the analog-to-digital converter 10131 from missing part of the recognition voltage. It can ensure that the analog-to-digital converter 10131 converts all the recognition voltages into recognition signals, thereby improving the accuracy of touch recognition.

[0077] Figure 12 is a circuit diagram of another current conversion unit provided in an embodiment of this application. As shown in Figure 12, the current conversion unit 1013 further includes: a buffer amplifier 10134. The first input terminal of the buffer amplifier 10134 is connected to the second terminal of the fourth switch K4, the second input terminal of the buffer amplifier 10134 is connected to the second terminal of the sixth switch K6, the first output terminal of the buffer amplifier 10134 is connected to the first input terminal of the analog-to-digital converter 10131, and the second output terminal of the buffer amplifier 10134 is connected to the second input terminal of the analog-to-digital converter 10131. The buffer amplifier 10134 can perform signal amplification processing on the identified voltage.

[0078] In this embodiment, the current conversion unit 1013 further includes a buffer amplifier 10134. The buffer amplifier 10134 can amplify the recognition voltage signal. The buffer amplifier 10134 can be a level converter or buffer, etc. Specifically, it can increase the high level and decrease the low level in the recognition voltage to amplify the signal amplitude. This can make the recognition voltage signal amplitude of the input analog-to-digital converter 10131 larger, avoiding the inability of the analog-to-digital converter 10131 to convert the recognition voltage into a recognition signal due to the small recognition voltage, thus improving the accuracy of touch recognition.

[0079] This application embodiment also provides a touch chip, which is used to output a first driving signal to a touch module, and according to the touch module responding to the first driving signal, and when the finger touches, the touch module, the finger, the human body and the electrodes on the touch screen form a closed loop, the touch module sequentially transmits the first driving signal to the closed loop through the human body and the finger, and the sensing signal generated in the closed loop is used for touch position recognition.

[0080] In this embodiment, the touch chip 101 can be any of the touch chips 101 in the above embodiments, and can perform the operations in any of the above embodiments, which will not be described again here.

[0081] Figure 13 is a schematic diagram of a display screen module provided in an embodiment of this application. As shown in Figure 13, the display screen module 400 includes an electrode 401 and a touch device 100 in any of the above embodiments. When a finger touches the screen, the electrode 401 forms a closed loop with the touch module, the human body and the finger. The electrode 401 includes horizontal electrodes and / or vertical electrodes arranged on the touch screen.

[0082] Figure 14 is a schematic diagram of an electronic device provided in an embodiment of this application. As shown in Figure 14, the electronic device 200 includes a processor 201 and a display screen module 400 in the above embodiment. The processor 201 is electrically connected to the display screen module 400. The processor 201 is used to send a switching signal to the touch device 100, so that the touch chip 101 in the touch device 100 outputs a first driving signal to the touch module 102 or outputs a second driving signal to the electrode 401.

[0083] In one example, Figure 15 is a schematic diagram of the switching principle of an electronic device provided in an embodiment of this application. As shown in Figure 15, when the electronic device is in underwater touch mode, the touch position can be identified through the touch device. When the electronic device is in non-underwater mode, the touch position can be detected through the electrodes in the screen module. In one example, the electronic device can switch between underwater touch mode and non-underwater touch mode by sending a switching signal to the touch chip in the touch device through the processor.

[0084] In this embodiment, the processor 201 can send a switching signal to the touch device 100, causing the touch chip 101 in the touch device 100 to output a first driving signal to the touch module 102 or a second driving signal to the electrode 401. This allows switching between daily use scenarios and underwater use scenarios. Since the switching between the regular touch mode and the underwater touch mode is based on the switching signal, it is applicable to touch position recognition in both daily and underwater scenarios. It is applicable to touch position recognition in various use scenarios and has high applicability.

[0085] This application also provides a touch device for mobile phones, the touch device comprising: a touch chip and a touch module, the touch module comprising the metal buttons and / or metal casing of the mobile phone, the touch chip being able to output a first driving signal to the touch module, the touch module being able to receive the first driving signal, and when a finger touches the screen, the first driving signal is transmitted to the finger through the human body in contact with the touch module, so that the finger senses the electrodes on the touch screen to generate a sensing signal, and the touch chip identifies the touch position based on the sensing signal.

[0086] Specifically, when underwater, the human body comes into contact with the metal buttons and / or metal casing of the mobile phone. For example, in Figure 5(a), the finger contacts the metal button 1021 of the mobile phone. When the finger touches the screen, the touch module comes into contact with the human body, as shown in Figure 6. The touch module 102, the human body 300 in contact with the touch module 102, the finger 301, and the electrode 401 form a closed loop. The electrode 401 can be a horizontal electrode and / or a vertical electrode. In Figure 6, the equivalent signal source L1 is the first driving signal received by the touch module 102 (the metal buttons and / or metal casing of the mobile phone). The capacitor CH T1 is the equivalent capacitance between finger 301 and electrode 401. The touch module 102 transmits the first driving signal to finger 301 through human body 300. There is mutual inductance between finger 301 and electrode 401. Due to the different conductivity of water and human body 300, and the difference between the equivalent capacitance between water and electrode 401 and the equivalent capacitance between finger 300 and electrode 401, the signal in the closed loop changes, i.e., an induction signal is generated. Electrode 401 sends the induction signal to touch chip 101 through the pin of touch chip 101. Touch chip 101 performs touch position recognition based on the induction signal.

[0087] In this embodiment, the touch chip outputs a first driving signal to the touch module. The touch module receives the first driving signal. When a finger touches the screen, the touch module transmits the first driving signal to the finger through the human body in contact with the touch module, causing the finger to sense the electrodes on the touch screen and generate a sensing signal. The touch chip performs touch position recognition based on the sensing signal. Since the sensing signal is generated by the difference in conductivity between water and the human body, and the difference in equivalent capacitance between water and electrodes and between the finger and electrodes, the sensing signal is generated. Therefore, compared with the prior art of touch position recognition through electrode self-capacitance or mutual capacitance, this touch device is applicable to touch position recognition in underwater environments. Thus, this touch device is applicable to touch position recognition in various usage scenarios, allowing the mobile phone to be touched underwater, and thus enabling the mobile phone to be used underwater, with high applicability.

[0088] This application also provides a touch control device for wearable devices. The touch control device includes a touch chip and a touch module. The touch module includes a metal casing and / or metal electrodes of the wearable device. The touch chip can output a first driving signal to the touch module. The touch module can receive the first driving signal and, when a finger touches the screen, transmit the first driving signal to the finger through the human body in contact with the touch module, so that the finger senses the electrodes on the touch screen to generate a sensing signal. The touch chip identifies the touch position based on the sensing signal.

[0089] Wearable devices can be watches, bracelets, and other devices worn on the human body with touch control functions. The metal electrodes of wearable devices can be used to detect human biometrics, such as heart rate and body temperature. The following explanation uses a watch as an example. Specifically, when underwater, the human body is in contact with the watch's metal casing and / or metal electrodes, for example, the watch's metal casing 1022 and / or metal electrodes 1023 shown in Figure 5(b). When the watch is worn, the watch's metal casing 1022 and / or metal electrodes 1023 are in contact with the wrist. When the finger 301 touches the screen, the touch module 102 is in contact with the human body 300, as shown in Figure 6. The touch module 102, the human body 300 in contact with the touch module 102, the finger 301, and the electrodes 402 are all connected. A closed loop is formed. The electrode 401 can be a horizontal electrode and / or a vertical electrode. In Figure 6, the equivalent signal source L1 is the first driving signal received by the touch module 102. The capacitor CHT1 is the equivalent capacitance between the finger 301 and the electrode 401. The touch module 102 transmits the first driving signal to the finger 301 through the human body 300. The finger 301 and the electrode 401 are mutually inductive. Due to the different conductivity of water and human body 300, and the difference between the equivalent capacitance between water and electrode 401 and the equivalent capacitance between finger 300 and electrode 401, the signal in the closed loop changes, i.e., an induction signal is generated. The electrode 401 sends the induction signal to the touch chip 101 through the pins of the touch chip 101. The touch chip 101 performs touch position recognition based on the induction signal.

[0090] In this embodiment, the touch chip outputs a first driving signal to the touch module. The touch module receives the first driving signal. When a finger touches the screen, the touch module transmits the first driving signal to the finger through the human body in contact with the touch module, causing the finger to sense the electrodes on the touch screen and generate a sensing signal. The touch chip performs touch position recognition based on the sensing signal. Since the sensing signal is generated by the different conductivity between water and the human body, and the different equivalent capacitance between water and the electrodes and between the finger and the electrodes, the sensing signal is generated. Therefore, compared with the prior art of touch position recognition through electrode self-capacitance or mutual capacitance, this touch device is applicable to touch position recognition in underwater environments. Therefore, this touch device is applicable to touch position recognition in various usage scenarios, and can make wearable devices touchable underwater, thus enabling wearable devices to be used underwater, with high applicability.

[0091] It should be understood that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, for the method embodiments, since they are basically similar to the methods described in the apparatus and system embodiments, the description is relatively simple, and relevant parts can be referred to the descriptions of other embodiments.

[0092] It should be understood that the foregoing describes specific embodiments of this specification. Other embodiments are within the scope of the claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0093] It should be understood that the use of a singular form to describe an element or to show only one element in the accompanying drawings does not imply that the number of such element is limited to one. Furthermore, modules or elements described or shown as separate herein may be combined into a single module or element, and modules or elements described or shown as single herein may be broken down into multiple modules or elements.

[0094] It should also be understood that the terminology and expressions used herein are for descriptive purposes only, and one or more embodiments described herein should not be limited to these terms and expressions. The use of these terms and expressions does not exclude any illustrative and descriptive equivalent features (or parts thereof), and it should be recognized that various modifications that may exist should also be included within the scope of the claims. Other modifications, variations, and substitutions may also exist. Accordingly, the claims should be considered to cover all such equivalents.

Claims

1. A touch device, comprising: The application relates to a touch device. The touch chip is used for outputting a first driving signal to the touch module. The touch module is used for receiving the first driving signal, and when a finger touches, the touch module, the finger, a human body and electrodes on a touch screen form a closed loop, the touch module transmits the first driving signal into the closed loop through the human body and the finger in sequence to generate an induced signal in the closed loop, and the touch chip performs touch position recognition according to the induced signal. When the touch chip receives a switching signal of a processor in an electronic device, the touch chip stops outputting the first driving signal to the touch module, and the touch chip sends a second driving signal to the electrodes and performs position recognition according to touch signals output by the electrodes, wherein the electrodes include a plurality of horizontal electrodes and / or a plurality of vertical electrodes. 2.The touch device of claim 1, wherein, When the electronic device is in an underwater mode, the touch chip outputs the first driving signal to the touch module, and when the electronic device is in a non-underwater mode, the touch chip sends a second driving signal to the electrodes. 3.The touch device of claim 2, wherein, The touch chip sends the second driving signal to one of the plurality of horizontal electrodes and the plurality of vertical electrodes, and performs position recognition according to the touch signals output by the other of the plurality of horizontal electrodes and the plurality of vertical electrodes. 4.The touch device of claim 2, wherein, At least one of the plurality of horizontal electrodes and the plurality of vertical electrodes serves as both a driving electrode and a receiving electrode, the touch chip sends the second driving signal to the driving electrode, and performs position recognition according to the touch signals output by the receiving electrode. 5.The touch device of claim 2, wherein, The touch chip comprises a first switch and a second switch. 6.The touch device of claim 2, wherein, The first switch is electrically connected with a first pin, one end of the second switch is electrically connected with the first pin, and the other end of the second switch is grounded. When the first switch is closed and the second switch is opened, the touch chip outputs the first driving signal to the touch module through the first pin. When the first switch is opened and the second switch is closed, the touch chip stops outputting the first driving signal to the touch module and sends the second driving signal to the electrodes. The touch device further comprises a signal amplification module. 7.The touch device according to claim 6, wherein, An input end of the signal amplification module is connected with the first pin, and an output end of the signal amplification module is connected with the touch module. The signal amplification module is used for performing level amplification processing on the first driving signal and sending the first driving signal after the amplification processing to the touch module, and when the finger touches, the touch module transmits the first driving signal after the amplification into the closed loop through the human body and the finger in sequence. The touch module comprises a metal key and / or a metal shell of a mobile phone, or the touch module comprises a metal shell and / or a metal electrode of a wearable device. 8.The touch device according to any one of claims 1-7, characterized in that, The touch chip comprises a current conversion unit and a processing unit.

9. The touch control device according to claim 1, wherein, The current conversion unit is used for generating a recognition signal according to the induced signal. ​ The processing unit is configured to perform touch position recognition according to the identification signal. 10.The touch device of claim 9, wherein, The current conversion unit comprises a trans-impedance amplifier, a first resistor, a second resistor, a first feedback resistor, a second feedback resistor, a first capacitor, a second capacitor and an analog-to-digital converter; The first end of the first resistor is connected to the output end of the electrode, the second end of the first resistor is connected to the positive input end of the trans-impedance amplifier, the first end of the second resistor is connected to a reference voltage, the second end of the second resistor is connected to the negative input end of the trans-impedance amplifier, the negative output end of the trans-impedance amplifier is connected to the first input end of the analog-to-digital converter, and the positive output end of the trans-impedance amplifier is connected to the second input end of the analog-to-digital converter; The first end of the first feedback resistor is connected to the positive input end of the trans-impedance amplifier, and the second end of the first feedback resistor is connected to the negative output end of the trans-impedance amplifier; the first end of the second feedback resistor is connected to the negative input end of the trans-impedance amplifier, and the second end of the second feedback resistor is connected to the positive output end of the trans-impedance amplifier; The first end of the first capacitor is connected to the first end of the first feedback resistor, and the second end of the first capacitor is connected to the second end of the first feedback resistor; the first end of the second capacitor is connected to the first end of the second feedback resistor, and the second end of the second capacitor is connected to the second end of the second feedback resistor; The trans-impedance amplifier is configured to convert the induced signal into an identification voltage. The analog-to-digital converter is configured to receive the identification voltage and convert the identification voltage into the identification signal.

11. The touch control device according to claim 10, wherein, The current conversion unit further comprises a low-pass filter. The first input end of the low-pass filter is connected to the negative output end of the trans-impedance amplifier, the second input end of the low-pass filter is connected to the positive output end of the trans-impedance amplifier, the first output end of the low-pass filter is connected to the first input end of the analog-to-digital converter, and the second output end of the low-pass filter is connected to the second input end of the analog-to-digital converter; The low-pass filter is configured to perform low-pass filtering on the identification voltage to reduce external signal interference in the identification voltage.

12. The touch control device according to claim 11, wherein, The current conversion unit further comprises a sample and hold module; the sample and hold module comprises a third switch, a fourth switch, a fifth switch, a sixth switch, a third capacitor and a fourth capacitor; a first end of the third switch is connected with a first output end of the low-pass filter, a second end of the third switch is connected with a first end of the third capacitor and a first end of the fourth switch at the same time, a second end of the fourth switch is connected with a first input end of the analog-to-digital converter, and a second end of the third capacitor is grounded; a first end of the fifth switch is connected with a second output end of the low-pass filter, a second end of the fifth switch is connected with a first end of the fourth capacitor and a first end of the sixth switch at the same time, a second end of the sixth switch is connected with a second input end of the analog-to-digital converter, and a second end of the fourth capacitor is grounded; and the sample and hold module is used for holding the identification voltage.

13. The touch device according to claim 12, characterized in that, The current conversion unit further comprises a buffer amplifier; a first input end of the buffer amplifier is connected with the second end of the fourth switch, a second input end of the buffer amplifier is connected with the second end of the sixth switch, a first output end of the buffer amplifier is connected with the first input end of the analog-to-digital converter, and a second output end of the buffer amplifier is connected with the second input end of the analog-to-digital converter; and the buffer amplifier is used for performing signal amplification processing on the identification voltage.

14. A touch chip, comprising: The touch chip is configured to output a first driving signal to a touch module, and according to that the touch module receives the first driving signal and that a closed loop is formed by the touch module, a finger, a human body and electrodes on a touch screen when the finger touches, the touch module transmits the first driving signal to the closed loop through the human body and the finger in turn, and an induced signal generated in the closed loop is used for touch position recognition.

15. The touch chip of claim 14, wherein, The touch chip is configured to, when receiving a switching signal of a processor in an electronic device, stop outputting the first driving signal to the touch module, send a second driving signal to the electrodes, and perform position recognition according to a touch signal output by the electrodes, wherein the electrodes comprise a plurality of horizontal electrodes and / or a plurality of vertical electrodes.

16. The touch chip of claim 15, wherein, The touch chip is configured to output the first driving signal to the touch module when the electronic device is in an underwater mode, and send a second driving signal to the electrodes when the electronic device is in a non-underwater mode.

17. The touch chip of claim 15, wherein, The touch chip is configured to send the second driving signal to one of the plurality of horizontal electrodes and the plurality of vertical electrodes, and perform position recognition according to the touch signal output by the other of the plurality of horizontal electrodes and the plurality of vertical electrodes.

18. The touch chip of claim 15, wherein, At least one of the plurality of lateral electrodes and the plurality of longitudinal electrodes functions as both a driving electrode and a receiving electrode, and the touch chip is configured to send the second driving signal to the driving electrode and to perform position recognition according to the touch signal output by the receiving electrode.

19. The touch chip of claim 15, wherein, The touch chip comprises a first switch and a second switch. The first switch is electrically connected to a first pin, and one end of the second switch is electrically connected to the first pin, and the other end of the second switch is grounded. When the first switch is closed and the second switch is open, the touch chip outputs the first driving signal to the touch module through the first pin. When the first switch is open and the second switch is closed, the touch chip stops outputting the first driving signal to the touch module and sends the second driving signal to the electrode.

20. The touch chip according to any one of claims 14-19, characterized in that, The touch module comprises a metal key and / or a metal shell of a mobile phone, or the touch module comprises a metal shell and / or a metal electrode of a wearable device.

21. The touch chip of claim 14, wherein, The touch chip comprises a current conversion unit and a processing unit. The current conversion unit is configured to generate an identification signal according to the sensing signal. The processing unit is configured to perform touch position recognition according to the identification signal.

22. The touch chip of claim 21, wherein, The current conversion unit comprises a transimpedance amplifier, a first resistor, a second resistor, a first feedback resistor, a second feedback resistor, a first capacitor, a second capacitor, and an analog-to-digital converter. A first end of the first resistor is connected to an output end of the electrode, a second end of the first resistor is connected to a positive input end of the transimpedance amplifier, a first end of the second resistor is connected to a reference voltage, a second end of the second resistor is connected to a negative input end of the transimpedance amplifier, a negative output end of the transimpedance amplifier is connected to a first input end of the analog-to-digital converter, and a positive output end of the transimpedance amplifier is connected to a second input end of the analog-to-digital converter. A first end of the first feedback resistor is connected to the positive input end of the transimpedance amplifier, and a second end of the first feedback resistor is connected to the negative output end of the transimpedance amplifier; a first end of the second feedback resistor is connected to the negative input end of the transimpedance amplifier, and a second end of the second feedback resistor is connected to the positive output end of the transimpedance amplifier. A first end of the first capacitor is connected to the first end of the first feedback resistor, and a second end of the first capacitor is connected to the second end of the first feedback resistor; a first end of the second capacitor is connected to the first end of the second feedback resistor, and a second end of the second capacitor is connected to the second end of the second feedback resistor. The transimpedance amplifier is configured to convert a sensing signal into an identification voltage. The analog-to-digital converter is configured to receive the identification voltage and convert the identification voltage into the identification signal.

23. The touch chip of claim 22, wherein, The current conversion unit further comprises a low-pass filter. A first input terminal of the low-pass filter is connected with a negative output terminal of the transimpedance amplifier, a second input terminal of the low-pass filter is connected with a positive output terminal of the transimpedance amplifier, a first output terminal of the low-pass filter is connected with a first input terminal of the analog-to-digital converter, and a second output terminal of the low-pass filter is connected with a second input terminal of the analog-to-digital converter; The low-pass filter is configured to perform low-pass filtering on the identification voltage to reduce external signal interference in the identification voltage.

24. The touch chip of claim 23, wherein, The current conversion unit further comprises a sample-and-hold module, the sample-and-hold module comprises a third switch, a fourth switch, a fifth switch, a sixth switch, a third capacitor and a fourth capacitor, a first terminal of the third switch is connected with the first output terminal of the low-pass filter, a second terminal of the third switch is connected with a first terminal of the third capacitor and a first terminal of the fourth switch, a second terminal of the fourth switch is connected with the first input terminal of the analog-to-digital converter, and a second terminal of the third capacitor is grounded, a first terminal of the fifth switch is connected with the second output terminal of the low-pass filter, a second terminal of the fifth switch is connected with a first terminal of the fourth capacitor and a first terminal of the sixth switch, a second terminal of the sixth switch is connected with the second input terminal of the analog-to-digital converter, and a second terminal of the fourth capacitor is grounded, and the sample-and-hold module is configured to hold the identification voltage.

25. The touch chip of claim 24, wherein, The current conversion unit further comprises a buffer amplifier, a first input terminal of the buffer amplifier is connected with the second terminal of the fourth switch, a second input terminal of the buffer amplifier is connected with the second terminal of the sixth switch, a first output terminal of the buffer amplifier is connected with the first input terminal of the analog-to-digital converter, and a second output terminal of the buffer amplifier is connected with the second input terminal of the analog-to-digital converter, and the buffer amplifier is configured to perform signal amplification processing on the identification voltage.

26. A display screen module, characterized by The electrode and the touch device as claimed in any one of claims 1-13 are comprised. When the finger performs touch control, the electrode, the touch module, the human body and the finger form a closed loop, wherein the electrode comprises transverse electrodes and / or longitudinal electrodes arranged on the touch screen.

27. An electronic device, comprising: The display screen module as claimed in claim 26 and the processor are comprised. The processor is electrically connected with the display screen module. The processor is configured to send a switching signal to the touch device, so that a touch chip in the touch device outputs a first driving signal to the touch module or outputs a second driving signal to the electrode.

28. A touch device applied to a mobile phone, characterized in that, The touch device comprises a touch chip and a touch module, and the touch module comprises metal keys and / or a metal shell of the mobile phone. The touch chip is configured to output a first driving signal to the touch module. The touch module is configured to receive the first driving signal, and when the finger performs touch control, the first driving signal is transmitted to the finger through the human body in contact with the touch module, so that the finger is inductive with the electrode on the touch screen to make the electrode form an induction signal, and the touch chip performs touch position recognition according to the induction signal. 29.A touch device applied to a wearable device, characterized in that, The touch device comprises a touch chip and a touch module, the touch module comprises a metal shell and / or a metal electrode of the wearable device; The touch chip is configured to output a first driving signal to the touch module; The touch module is configured to receive the first driving signal, and when a finger touches, transmit the first driving signal to the finger through a human body in contact with the touch module, so that the finger is inductive with an electrode on the touch screen to make the electrode form an induction signal, and the touch chip identifies a touch position according to the induction signal.

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