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

Abstract

The embodiment of the utility model provides a touch control device, a touch control chip, a display screen module and electronic equipment, and the touch control device comprises the touch control chip which is used for outputting a first driving signal; the sensing circuit is used for receiving a first excitation signal, the sensing circuit, a finger and an electrode on the touch screen form a closed circuit when the finger performs touch, a sensing signal is generated in the closed circuit, and the touch chip performs touch position identification according to the sensing signal, the first excitation signal is obtained according to the first driving signal, the induction loop is located in the touch screen, and the electrodes comprise a plurality of transverse electrodes and / or a plurality of longitudinal electrodes. The touch device provided by the embodiment of the utility model can be suitable for touch position identification in an underwater scene, and the applicability is relatively high.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electrical engineering technology, and in particular to a touch control device, a touch control chip, a display screen module and an electronic device. Background Art

[0002] With the development of science and technology, the integration of electronic devices is higher, and more and more electronic devices support IP6X waterproof level. There are many scenarios that require the use of electronic devices underwater, such as: using mobile phones, touchpads and other electronic devices that need to touch the display screen underwater.

[0003] Currently, the touch control device included in the display screen of the electronic device uses electrode self-capacitance and / or mutual capacitance to identify touch control instructions.

[0004] However, since the electrode self-capacitance and / or mutual capacitance are sensitive to water when identifying touch commands, the touch commands of fingers cannot be identified when the display screen is covered with water, resulting in that existing electronic devices cannot be used underwater. Utility Model Content

[0005] In view of this, embodiments of the present application provide a touch device, a touch chip, a display screen module and an electronic device to at least partially solve the above problems.

[0006] According to a first aspect of an embodiment of the present application, a touch control device is provided, comprising: a touch control chip, the touch control chip being used to output a first drive signal; and a sensing circuit, the sensing circuit being used to receive a first excitation signal, wherein when a finger performs a touch control, the sensing circuit, the finger, and electrodes on the touch screen form a closed circuit, and a sensing signal is generated in the closed circuit, and the touch chip performs touch position identification according to the sensing signal, wherein the first excitation signal is obtained according to the first drive signal, the sensing circuit is located in the touch screen, and the electrodes include multiple horizontal electrodes and / or multiple vertical electrodes.

[0007] According to a second aspect of an embodiment of the present application, a touch chip is provided, which is used to output a first drive signal and respond to a first excitation signal according to an induction circuit. When a finger touches the touch screen, the induction circuit, the finger, and the electrodes on the touch screen form a closed circuit, and the touch position is identified by the induction signal generated in the closed circuit, wherein the first excitation signal is obtained according to the first drive signal, the induction circuit is located in the touch screen, and the electrodes include multiple horizontal electrodes and / or multiple vertical electrodes.

[0008] According to a third aspect of an embodiment of the present application, a display screen module is provided, comprising electrodes and a touch device as described in the first aspect of an embodiment of the present application; when a finger touches, the electrode forms a closed loop with the induction circuit and the finger, wherein the electrode comprises horizontal electrodes and / or vertical electrodes arranged on the touch screen.

[0009] According to a fourth aspect of the embodiments of the present application, an electronic device is provided, comprising a processor and the display screen module described in the second aspect of the embodiments of the present application; the processor is electrically connected to the display screen module; the processor is used to send a switching signal to the touch control device so that the touch control chip in the touch control device outputs a first drive signal to the induction circuit or outputs a second drive signal to the electrode.

[0010] According to the touch device provided in the embodiment of the present application, the touch chip outputs a first drive signal, and the induction circuit receives a first excitation signal obtained based on the first drive signal. When a finger performs a touch, the induction circuit, the finger and the electrode form a closed circuit, and a sensing signal can be generated in the closed circuit at this time, so that the touch chip can identify the touch position according to the sensing signal. Since a changing signal is generated according to the difference between the equivalent capacitance between water and the induction circuit, and between water and the electrode and the equivalent capacitance between the finger and the induction circuit, and between the finger and the electrode, the generation of the sensing signal is realized. Therefore, compared with the touch position identification through electrode self-capacitance or mutual capacitance in the prior art, the touch device can be suitable for touch position identification in an underwater environment. Therefore, the touch device can be suitable for touch position identification in a variety of usage scenarios, and has high applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0012] Figure 1 is a schematic diagram of a touch control device provided in an embodiment of the present application;

[0013] Figure 2 is a schematic diagram of a display screen provided in an embodiment of the present application;

[0014] Figure 3 is a schematic diagram of a touch control device in a normal mode provided by an embodiment of the present application;

[0015] Figure 4 is a schematic diagram of an induction loop provided in an embodiment of the present application;

[0016] Figure 5 is a schematic diagram of an equivalent circuit of a closed loop provided in an embodiment of the present application;

[0017] Figure 6 is a schematic diagram of a touch control chip provided in an embodiment of the present application;

[0018] Figure 7 is a schematic diagram of a touch control device including a signal amplification module provided in an embodiment of the present application;

[0019] Figure 8 is a schematic diagram of another touch control device provided in an embodiment of the present application;

[0020] Fig. 9 is a schematic diagram of a level conversion unit provided in an embodiment of the present application;

[0021] Fig.10 is a schematic diagram of another induction loop provided in an embodiment of the present application;

[0022] Fig.11 is a schematic diagram of another touch chip provided in an embodiment of the present application;

[0023] Fig.12 is a schematic diagram of another touch control chip provided in an embodiment of the present application;

[0024] Fig.13 is a schematic diagram of another touch control device provided in an embodiment of the present application;

[0025] Fig.14 is a schematic diagram of an equivalent circuit diagram of another closed loop provided in an embodiment of the present application;

[0026] Fig.15 is a circuit diagram of a level conversion unit provided in an embodiment of the present application;

[0027] Fig.16 is a schematic diagram of an example of a level conversion unit provided in an embodiment of the present application;

[0028] Fig.17 is a schematic diagram of another example of a level conversion unit provided in an embodiment of the present application;

[0029] Fig.18 is a schematic diagram of an output voltage timing provided by an embodiment of the present application;

[0030] Fig.19 is a circuit diagram of another level conversion unit provided in an embodiment of the present application;

[0031] Fig. 20 is a schematic diagram of a touch screen provided in an embodiment of the present application;

[0032] Fig.21 is a schematic diagram of another touch control chip provided in an embodiment of the present application;

[0033] Fig. 22 is a circuit diagram of a current conversion unit provided in an embodiment of the present application;

[0034] Fig.23 is a circuit diagram of another current conversion unit provided in an embodiment of the present application;

[0035] Fig.24 is a circuit diagram of another current conversion unit provided in an embodiment of the present application;

[0036] Fig.25 is a circuit diagram of another current conversion unit provided in an embodiment of the present application;

[0037] Fig.26 is a schematic diagram of a display screen module provided in an embodiment of the present application;

[0038] Fig. 27 is a schematic diagram of an electronic device provided in an embodiment of the present application;

[0039] Fig.28 This is a rendering of a touch position recognition provided by an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and in detail below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the embodiments of the present application should fall within the scope of protection of the embodiments of the present application.

[0041] As mentioned above, with the development of science and technology, the integration of electronic devices is higher, and more and more electronic devices support IP6X waterproof level. There are many scenarios that require the use of electronic devices underwater, such as: using mobile phones, touchpads and other electronic devices that need to touch the display screen underwater. At present, the touch device included in the display screen of the electronic device uses electrode self-capacitance and / or mutual capacitance to identify touch commands. However, since the electrode self-capacitance and / or mutual capacitance are more sensitive to water when identifying touch commands, when the display screen is covered with water, the touch command of the finger cannot be recognized, resulting in the existing electronic equipment being unable to be used underwater.

[0042] A touch device is provided in an embodiment of the present application. The touch chip outputs a first drive signal, and the induction circuit receives a first excitation signal obtained based on the first drive signal. When a finger touches the device, the induction circuit, the finger and the electrode form a closed circuit. At this time, a sensing signal can be generated in the closed circuit, so that the touch chip can identify the touch position according to the sensing signal. Since a changing signal is generated according to the difference between the equivalent capacitance between water and the induction circuit, and between water and the electrode and the equivalent capacitance between the finger and the induction circuit, and between the finger and the electrode, the generation of the sensing signal is realized. Therefore, compared with the touch position identification through electrode self-capacitance or mutual capacitance in the prior art, the touch device can be suitable for touch position identification in an underwater environment. Therefore, the touch device can be suitable for touch position identification in a variety of usage scenarios, and has high applicability.

[0043] The touch control device provided by the present application is described below through embodiments.

[0044] Figure 1 is a schematic diagram of a touch device provided in an embodiment of the present application, such as Figure 1 As shown, the touch control device 100 includes a touch control chip 101 and a sensing circuit 102. The touch control chip 101 can output a first driving signal, and the sensing circuit 102 can receive a first excitation signal. When a finger touches the touch screen, the sensing circuit 102, the finger, and an electrode 401 on the touch screen form a closed loop, and a sensing signal is generated in the closed loop. The touch control chip 101 identifies the touch position according to the sensing signal, wherein the first excitation signal is obtained according to the first driving signal, the sensing circuit 102 is located in the touch screen, and the electrode 401 includes a plurality of horizontal electrodes and / or a plurality of vertical electrodes.

[0045] The touch control device 100 includes a touch control chip 101 and a sensing circuit 102. Optionally, the touch control chip 101 can be electrically connected to the sensing circuit 102. The touch control chip 101 can output a first drive signal. In an example, the first drive signal can be a voltage signal. The first drive signal can be a sine wave waveform signal, a square wave waveform signal, a trapezoidal wave waveform signal, etc.

[0046] The induction loop 102 can receive a first excitation signal obtained based on the driving signal. When a finger touches the touch screen, the finger, the induction loop 102 and the electrode 401 form a closed loop. Specifically, there is an equivalent capacitance between the finger and the induction loop 102, and there is an equivalent capacitance between the finger and the electrode 401. Thus, the induction loop 102, the equivalent capacitance between the finger and the induction loop 102, the finger, the equivalent capacitance between the finger and the electrode 401, and the electrode 401 form a closed loop. Since the induction loop 102 receives the first excitation signal, an induction signal can be generated in the closed loop. Specifically, when in an underwater environment, there is an equivalent capacitance between water and the induction loop 102, and between water and the electrode 401, so the induction loop 102, water and the electrode 401 form a closed loop. When the finger touches, since the equivalent capacitance between water and the induction loop 102, and between water and the electrode 401 is different from the equivalent capacitance between the finger and the induction loop 102, and between the finger and the electrode 401, the signal in the electrode 401 changes to form an induction signal.

[0047] 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 according to the sensing signal. In one example, the touch chip 101 can convert the sensing signal into a digital signal and then send the digital signal to the processor of the electronic device, thereby realizing touch position recognition.

[0048] In the embodiment of the present application, the touch chip 101 outputs a first drive signal, and the sensing circuit 102 receives a first excitation signal obtained based on the first drive signal. When a finger touches the touch device, the sensing circuit 102, the finger and the electrode 401 form a closed circuit. At this time, a sensing signal can be generated in the closed circuit, so that the touch chip 101 can identify the touch position according to the sensing signal. Since a changing signal is generated according to the difference between the equivalent capacitance between water and the sensing circuit 102, and between water and the electrode 401 and the equivalent capacitance between the finger and the sensing circuit 102, and between the finger and the electrode 401, the generation of the sensing signal is realized. Therefore, compared with the touch position identification through the self-capacitance or mutual capacitance of the electrode 401 in the prior art, the touch device 100 can be applicable to touch position identification in an underwater environment. Therefore, the touch device 100 can be applicable to touch position identification in a variety of usage scenarios, and has high applicability.

[0049] In a possible implementation, the induction loop can detect cracks on the touch screen.

[0050] The induction loop may be a coil for performing crack detection on the touch screen before the touch screen leaves the factory, that is, the induction loop may be a panel crack detection (PCD) coil. In one example, when performing crack detection on the touch screen, a detection voltage may be input from one end of the PCD coil, and the other end may be connected to a detection resistor, and then a voltage detection may be performed on the detection resistor. If the voltage of the detection resistor is small, it proves that the touch screen has cracks, and if the voltage of the detection resistor is close to the detection voltage, it proves that the touch screen does not have cracks.

[0051] In an embodiment of the present application, the induction circuit can perform crack detection on the touch screen, that is, the induction circuit can be a PCD coil that performs crack detection on the touch screen before the touch screen leaves the factory. Therefore, when performing underwater touch detection, the induction circuit and the PCD coil can be shared. Since each touch screen will be detected for cracks by the PCD coil when leaving the factory, each touch screen will have a built-in PCD coil. Therefore, during underwater touch detection, there is no need to additionally set up an induction circuit, thereby reducing the cost of the touch device.

[0052] In a possible implementation, the sensing loop and the electrode in the touch screen are located in the same layer.

[0053] In one example, Figure 2 is a schematic diagram of a display screen provided in an embodiment of the present application, such as Figure 2 As shown, the touch screen is composed of a silicon substrate (PI substrate), an array thin film field effect transistor (TFT) layer (Array TFT), an organic light-emitting layer (OLED) (OLED organic layer), a cathode plate, an organic encapsulation layer, a touch electrode layer, a polarizer, and a cover plate from bottom to top. The sensing circuit and the electrode are located in the same layer and are both arranged on the organic encapsulation layer. In one example, a plurality of metal strips arranged horizontally and a plurality of metal strips arranged vertically can be deposited on the organic encapsulation layer as electrodes, and a metal wire is deposited on the organic encapsulation layer to form a sensing circuit. In one example, in a direction parallel to the organic encapsulation layer, the minimum distance between the inner edge of the sensing circuit and the outer edge of the OLED organic layer is in the range of [175μm, 195μm], and the minimum distance between the outer edge of the sensing circuit and the outer edge of the organic encapsulation layer is in the range of [830μm, 870μm].

[0054] In the embodiment of the present application, the sensing circuit and the electrode in the touch screen are located in the same layer, so that the sensing circuit can be set in the touch screen, and when the finger touches the touch screen, the sensing circuit, the finger and the electrode on the touch screen form a closed loop. Since the sensing circuit and the electrode are located in the same layer, the transmission effect of the sensing signal is better, which increases the signal amount of the underwater touch position recognition signal, thereby improving the sensitivity and accuracy of underwater touch position recognition.

[0055] Figure 3 is a schematic diagram of a touch device in a normal mode provided by an embodiment of the present application, such as Figure 3 As shown, when the touch chip 101 receives the switching signal from the processor in the electronic device, the touch chip 101 stops outputting the first driving signal, sends the second driving signal to the electrode 401, and performs position recognition according to the touch signal output by the electrode 401.

[0056] When the touch chip 101 receives the switching signal sent by the processor, it switches from the underwater touch mode to the normal touch mode, and the touch chip 101 stops outputting the first drive signal. At this time, the induction loop 102 cannot receive the first excitation signal obtained based on the first drive signal, and the touch chip 101 outputs a second drive signal to the electrode 401. The second drive signal can be a sine wave waveform signal, a square wave waveform signal, or a trapezoidal wave waveform signal, etc. When the electrode 401 receives the second drive signal, it generates a sensing signal, and the touch chip 101 identifies the touch position according to the sensing signal.

[0057] It should be understood that Figure 3 As shown, the multiple electrodes 401 include multiple horizontal electrodes and / or multiple vertical electrodes, and the touch control chip 101 is electrically connected to each electrode 401. When the multiple horizontal electrodes and / or the multiple vertical electrodes generate sensing signals, the touch control chip 101 can detect the sensing signals generated in the multiple horizontal electrodes and / or the multiple vertical electrodes.

[0058] In the embodiment of the present application, when the touch chip 101 receives the switching signal, the touch chip 101 stops outputting the first drive signal and outputs the second drive signal to the electrode 401, thereby being suitable for touch position recognition in daily use scenarios. Since the conventional touch mode and the underwater touch mode are switched according to the switching signal, it can be suitable for touch position recognition in daily scenes and underwater scenes, and can be suitable for touch position recognition in a variety of usage scenarios, with high applicability.

[0059] In a possible implementation, when the electronic device is in the underwater mode, the touch control chip 101 outputs a first driving signal, and when the electronic device is in the non-underwater mode, the touch control chip 101 sends a second driving signal to the electrode 401 .

[0060] When the electronic device is in underwater mode, the touch chip 101 outputs a first drive signal, and the sensing circuit 102 receives a first excitation signal obtained according to the first drive signal. There is an equivalent capacitance between water and the sensing circuit 102, and between water and the electrode 401. Therefore, the sensing circuit 102, water and the electrode 401 form a closed loop, and a signal is generated at the electrode 401. When a finger touches, since the equivalent capacitance between water and the sensing circuit 102, and between water and the electrode 401 is different from the equivalent capacitance between the finger and the sensing circuit 102, and between the finger and the electrode 401, the signal in the electrode 401 changes, forming a sensing signal.

[0061] When the electronic device is in the non-underwater mode, the touch chip 101 outputs the first drive signal. At this time, the induction loop 102 cannot receive the first excitation signal obtained based on the first drive signal, and the induction loop 102 stops sensing. Then the touch chip 101 outputs the second drive signal to the electrode 401. The second drive signal can be a sine wave waveform signal, a square wave waveform signal, or a trapezoidal wave waveform signal, etc. When the electrode 401 receives the second drive signal, it generates a sensing signal, and the touch chip 101 identifies the touch position according to the sensing signal.

[0062] In one example, the underwater mode and the non-underwater mode can be switched by clicking a 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 achieve switching between the underwater mode and the non-underwater mode.

[0063] In the embodiment of the present application, when the electronic device is in the underwater mode, the touch chip 101 outputs a first drive signal, and when the electronic device is in the non-underwater mode, the induction circuit 101 sends a second drive signal to the electrode 401, so that the electronic device can switch between the underwater mode and the non-underwater mode. Therefore, the touch device can be suitable for touch position recognition in daily scenes and underwater scenes, and can be suitable for touch position recognition in a variety of usage scenarios, and has high applicability.

[0064] In a possible implementation, the touch chip 101 sends a second driving signal to one of the plurality of horizontal electrodes and the plurality of vertical electrodes, and performs position recognition according to a touch signal output by the other of the plurality of horizontal electrodes and the plurality of vertical electrodes.

[0065] One of the multiple horizontal electrodes and the multiple vertical electrodes is used as a driving electrode, and the touch chip 101 outputs a driving signal to the driving electrode. The other of the multiple horizontal electrodes and the multiple vertical electrodes is used as a receiving electrode to output a sensing signal. The touch chip 101 performs touch recognition according to the sensing signal and can identify the touch position of the finger. This method is a mutual capacitance detection method.

[0066] In addition, in another possible implementation, the self-capacitance detection method can be superimposed to identify the touch position of the finger, and at least one of the multiple horizontal electrodes and the multiple vertical electrodes is used 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 according to the sensing signal output by the receiving electrode. For example, the touch chip 101 outputs a driving signal to the multiple horizontal electrodes (driving electrodes) and receives the sensing signal output by the multiple horizontal electrodes (receiving electrodes), or the touch chip 101 outputs a driving signal to the multiple vertical electrodes (driving electrodes) and receives the sensing signal output by the multiple vertical electrodes (receiving electrodes), or the touch chip 101 simultaneously outputs a driving signal to the multiple horizontal electrodes and the multiple vertical electrodes and simultaneously receives the sensing signal output by the multiple horizontal electrodes and the multiple vertical electrodes, and the touch chip 101 identifies the touch position according to the received sensing signal.

[0067] In the embodiment of the present application, when the touch chip 101 receives the switching signal, the touch chip stops outputting the first drive signal and outputs the second drive signal to the electrode 401, thereby enabling touch position identification to be performed through the electrode 401 by adopting self-capacitance or mutual capacitance, which can be applicable to touch position identification in daily use scenarios. Since daily scenes and underwater scenes are switched according to the switching signal, touch position identification can be applicable to daily scenes and underwater scenes. The touch device 100 can be applicable to touch position identification in a variety of usage scenarios, and has high applicability.

[0068] Figure 4 is a schematic diagram of an induction loop provided in an embodiment of the present application, such as Figure 4 As shown, the sensing circuit 102 is connected to the first pin 10111 of the touch chip 101, the excitation signal is the first drive signal, the sensing circuit 102 can receive the first drive signal, and when a finger touches, the sensing circuit 102 forms a closed loop with the finger and the electrode 401, and transmits the first drive signal in the closed loop to generate a sensing signal.

[0069] The sensing loop 102 is electrically connected to the first pin 10111 of the touch chip 101. The sensing loop 102 can receive the first driving signal output by the touch chip 101 through the first pin 10111, and use the first driving signal as the first excitation signal. It should be understood that since the underwater touch recognition mode performs touch position recognition underwater, there is an equivalent capacitance between the sensing loop 102 and water, and between water and the electrode 401, forming a closed loop. Since the sensing loop 102 receives the first driving signal sent by the touch chip 101, a signal can be generated in the closed loop.

[0070] Figure 5is a schematic diagram of an equivalent circuit of a closed loop provided in an embodiment of the present application, such as Figure 5 As shown, when the finger 300 performs touch control, the sensing loop 102 forms a closed loop with the finger 300 and the electrode 401. The electrode 401 can be a horizontal electrode and / or a vertical electrode. Figure 5 The equivalent signal source L1 is the received first excitation signal, such as the first driving signal in the embodiment of the present application. The capacitor CHM1 is the equivalent capacitance between the finger 300 and the sensing circuit 102. The capacitor CHT1 is the equivalent capacitance between the finger 300 and the electrode 401. Since the equivalent capacitance between water and the sensing circuit 102, and between water and the electrode 401 is different from the equivalent capacitance between the finger 300 and the sensing circuit 102, and between the finger 300 and the electrode 401, the signal in the closed loop changes, that is, a sensing signal is generated. The electrode 401 sends the sensing signal to the touch chip 101 through the pin of the touch chip 101, and the touch chip 101 identifies the touch position according to the sensing signal.

[0071] In one example, when the touch chip 101 identifies the touch position according to the sensing signal, it can first detect the sensing signal generated by the horizontal electrode to obtain the Y-axis coordinate of the touch position, and then detect the sensing signal generated by the vertical electrode to obtain the X-axis coordinate of the touch position, or it can first detect the X-axis coordinate and then detect the Y-axis coordinate. In another example, the touch chip 101 can simultaneously detect the sensing signals generated by the horizontal electrodes and the vertical electrodes to directly obtain the X-axis coordinate and the Y-axis coordinate of the touch position. In another example, the touch chip 101 can only detect the sensing signals generated by the horizontal electrodes or the vertical electrodes, that is, only detect the X-axis coordinate or the Y-axis coordinate of the touch position, which can be suitable for scenarios with lower requirements on detection accuracy. The specific detection method can be set as needed and is not limited here.

[0072] In the embodiment of the present application, the sensing circuit 102 is connected to the first pin 10111 of the touch chip 101, so that the sensing circuit 102 can receive the first drive signal output by the touch chip 101 through the first pin 10111. When the finger 300 performs touch control, the sensing circuit 102 forms a closed loop with the finger 300 and the electrode 401, and transmits the first drive signal in the closed loop to generate a sensing signal, thereby realizing touch position recognition underwater. Since a changing signal is generated according to the difference between the equivalent capacitance between water and the sensing circuit 102, and between water and the electrode 401 and the equivalent capacitance between the finger 300 and the sensing circuit 102, and between the finger 300 and the electrode 401, the generation of the sensing signal is realized. Compared with the self-capacitance or mutual capacitance scheme in the prior art that can only perform touch recognition in daily scenarios, the touch device 100 can be applicable to touch recognition in an underwater environment. Therefore, the touch device 100 can be applicable to touch recognition in a variety of usage scenarios and has high applicability.

[0073] Figure 6 is a schematic diagram of a touch chip provided in an embodiment of the present application, such as Figure 6 As shown, the touch chip 101 includes a first switch K1 and a second switch K2, the first switch K1 is electrically connected to the first pin 10111, one end of the second switch K2 is connected to the first pin 10111, and the other end of the second switch K2 is grounded. When the first switch K1 is closed and the second switch K2 is disconnected, the touch chip 101 outputs a first drive signal to the sensing circuit 102. When the first switch K1 is disconnected and the second switch K2 is closed, the touch chip 101 stops outputting the first drive signal to the sensing circuit 102 and sends a second drive signal to the electrode 401.

[0074] The touch chip 101 includes a first switch K1 and a second switch K2. The first switch K1 is arranged between the first signal generator 1012 and the first pin 10111. One end of the first pin 10111 is connected to the first switch K1, and the other end of the first pin 10111 is electrically connected to the induction loop 102. One end of the second switch K2 is connected to the first pin 10111, and the other end of the second switch K2 is grounded. When the first switch K1 is closed and the second switch K2 is opened, the first signal generator 1012 in the touch chip 101 generates a first drive signal and transmits the first drive signal to the first pin 10111 through the closed first switch K1. The first pin 10111 sends the first drive signal to the induction loop 102 electrically connected to the first pin 10111, so that touch position recognition can be performed in an underwater scene.

[0075] When the second switch K2 is closed, the sensing loop 102 is grounded through the first pin 10111 and the closed second switch K2. At this time, the sensing loop 102 is short-circuited by the ground wire, and the touch chip 101 stops outputting the first drive signal to the sensing loop 102. It should be understood that when the second switch K2 is closed, in order to prevent the touch chip 101 from leaking electricity to the ground wire, the first switch K1 will be disconnected at this time. The touch chip 101 stops outputting the first drive signal to the sensing loop 102 and then outputs the second drive signal to the electrode 401, so that touch position recognition can be performed in daily scenarios.

[0076] In the embodiment of the present application, 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 disconnected, the touch chip 101 outputs a first drive signal to the induction loop 102. When the first switch K1 is disconnected and the second switch K2 is closed, the touch chip 101 sends a second drive signal to the electrode 401, thereby realizing switching between an underwater touch recognition mode and a daily touch recognition mode. Since the touch chip 101 can control the on and off 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 daily scenes and underwater scenes. The touch device 100 can be used for touch position recognition in a variety of usage scenarios and has high applicability.

[0077] Figure 7 is a schematic diagram of a touch control device including a signal amplification module provided in an embodiment of the present application, such as Figure 7 As shown, the touch control device 100 further includes: a signal amplifying module 103, the input end of the signal amplifying module 103 is connected to the first pin 10111, the output end of the signal amplifying module 103 is connected to the sensing loop 102, the signal amplifying module 103 can perform level amplification processing on the first driving signal, and send the amplified first driving signal to the sensing loop 102, so that the sensing loop 102 transmits the amplified first driving signal in a closed loop.

[0078] The signal amplification module 103 can perform signal amplification processing on the first drive signal output by the touch chip 101. The input end of the signal amplification module 103 receives the first drive signal output by the touch chip 101 through the first pin 10111, then performs signal amplification processing on the first drive signal, and sends the amplified first drive signal to the sensing circuit 102, thereby enabling the sensing circuit 102 to generate a sensing signal based on the amplified first drive signal, that is, the amplified first drive signal is used as the first excitation signal to generate a sensing signal.

[0079] In one example, the difference range between the peak and the trough of the first drive signal before signal amplification is [1Vpp, 10Vpp], that is, the difference range between the high level and the low level is between 1Vpp-10Vpp, and the difference range between the peak and the trough of the first drive signal after signal amplification processing is [1Vpp, 30Vpp], that is, the difference range between the high level and the low level is between 1Vpp-30Vpp.

[0080] In the embodiment of the present application, the touch control device 100 also includes a signal amplification module 103, which can perform signal amplification processing on the first drive signal output by the touch control chip 101, so that the signal amplitude of the first drive signal can be increased, thereby transmitting the first drive signal with a large signal amplitude in a closed loop, and the signal amplitude of the generated sensing signal is large, thereby improving the sensitivity of the touch control device 100 to identify the touch position.

[0081] Figure 8 is a schematic diagram of another touch device provided in an embodiment of the present application, such as Figure 8 As shown, the touch control device 100 also includes a level conversion unit 104, an input pin 1041 of the level conversion unit 104 is electrically connected to the second pin 10112 of the touch control chip 101, a first output pin 1042 of the level conversion unit 104 is electrically connected to the ground pin 10113 of the touch control chip 101, and a second output pin 1043 of the level conversion unit 104 is connected to a power supply pin 10114 of the touch control chip 101. The level conversion unit 104 can receive a first drive signal output by the touch control chip 101 through the second pin 10112, generate a third drive signal according to the first drive signal, and transmit a power supply voltage to the touch control chip 101 through the power supply pin 10114, and a voltage difference between the power supply voltage and the third drive signal is equal to the power supply voltage of the touch control chip 101.

[0082] The level conversion unit 104 can receive the first driving signal output by the touch chip 101 through the second pin 10112 through the input pin 1041. In an example, the first driving signal can be a Sync synchronization signal between the touch chip 101 and the level conversion unit 104, and the Sync synchronization signal is a square wave signal. After receiving the first driving signal, the level conversion unit 104 generates a third driving signal according to the first driving signal.

[0083] After the level conversion unit 104 generates the third drive signal, the third drive signal is sent to the ground pin 10113 of the touch chip 101 through the first output pin 1042. At this time, the voltage of the ground pin 10113 of the touch chip 101 is the third drive signal, instead of 0. The second output pin 1043 of the level conversion unit 104 transmits the power supply voltage to the power supply pin 10114 of the touch chip 101. The voltage difference between the power supply pin 10114 and the ground pin 10113 of the touch chip 101 is the power supply voltage of the touch chip 101, that is, the voltage difference between the power supply voltage and the third drive signal is equal to the power supply voltage of the touch chip 101.

[0084] In one example, the power supply voltage fluctuates according to the voltage fluctuation of the third drive signal, and the voltage difference between the power supply voltage and the third drive signal is constant at 3V. For example, when the third drive signal is a low level signal of 0V, the power supply voltage is 3V, and when the third drive signal is a high level signal of 12V, the power supply voltage is 15V, and the voltage difference between the power supply voltage and the third drive signal is constant at 3V.

[0085] In one example, Fig. 9 is a schematic diagram of a level conversion unit provided in an embodiment of the present application, such as Fig. 9 As shown, the level conversion unit 104 may include a communication unit 1044, and the communication unit 1044 may be electrically connected to the communication pin 10115 in the touch chip 101, for example, electrically connected to the SPI pin in the touch chip, and the touch chip 101 may communicate with the level conversion unit 104 through the communication pin 10115, and perform operations such as setting the level conversion unit 104, and the communication unit 1044 may step down the communication signal output by the touch chip 101 and send it to the processor in the electronic device, for example, step down the touch position coordinate signal output by the touch chip 101 and send it to the processor in the electronic device. It should be understood that since the level conversion unit 104 generates the third drive signal and sends the third drive signal to the ground pin 101 of the touch chip 101, 0113, therefore, the reference voltage of the ground pin 10113 of the touch chip 101 is not the 0V of the ground line, but the third drive signal. When the third drive signal is at a high level, the voltage of the communication signal generated by the touch chip 101 based on the reference voltage of the ground pin 10113 is higher. For example, when the ground pin 10113 of the touch chip 101 is 0V, the touch position coordinate signal output by the touch chip 101 is 3V; when the ground pin 10113 of the touch chip 101 is 10V, the touch position coordinate signal output by the touch chip 101 is 13V, and so on. At this time, the communication unit 1044 can reduce the voltage of the communication signal sent by the touch chip 101 and send it to the processor, for example, reducing the voltage of a 13V communication signal to a 3V communication signal to prevent the processor from being damaged by high voltage.

[0086] In the embodiment of the present application, the sensing circuit 102 includes a level conversion unit 104. After receiving the first driving signal, the level conversion unit 104 generates a third driving signal according to the first driving signal, thereby increasing the voltage of the ground pin 10113 of the touch chip, and the power supply pin 10114 transmits the power supply voltage to the touch chip 101. Therefore, when the voltage of the ground pin 10113 of the touch chip 101 is the third driving signal output by the level conversion unit 104, the power supply voltage of the touch chip 101 remains unchanged, thereby ensuring the stable power supply of the touch chip 101 and allowing the touch chip 101 to work normally.

[0087] Fig.10 is a schematic diagram of another induction loop provided in an embodiment of the present application, such as Fig.10 As shown, the sensing loop 102 is connected to the third pin 10116 of the touch chip 101 . The touch chip 101 can generate a first excitation signal based on the third driving signal, and transmit the first excitation signal to the sensing loop 102 through the third pin 10116 .

[0088] Similar to the communication signal in the above embodiment, since the reference voltage of the ground pin 10113 of the touch chip 101 is the third drive signal, the touch chip 101 generates a first excitation signal based on the third drive signal. The first excitation signal can be a sine wave waveform signal, a square wave waveform signal, a trapezoidal wave waveform signal, etc. For example: before the ground pin 10113 of the touch chip 101 is suspended, that is, when the reference voltage of the ground pin 10113 is 0V, the touch chip 101 generates a first excitation signal of 0V-3V in a cycle, that is, the difference between the high level and the low level of the first excitation signal is 3Vpp. When the ground pin 10113 of the touch chip 101 is suspended, that is, when the reference voltage of the ground pin 10113 is the third drive signal, taking the third drive signal as a square wave signal of 0V-12V as an example, when the third drive signal is 12V, the touch chip 101 generates a first excitation signal of 15V based on the reference voltage of 12V. Therefore, the touch chip 101 can generate a first excitation signal of 0V-15V in a cycle, that is, the difference between the high level and the low level of the first excitation signal is 15Vpp, thereby obtaining a first excitation signal with a larger signal amplitude.

[0089] The equivalent circuit diagram is as follows Figure 5 As shown, when the finger 300 performs touch control, the sensing loop 102 forms a closed loop with the finger 300 and the electrode 401. The electrode 401 can be a horizontal electrode and / or a vertical electrode. Figure 5 The equivalent signal source L1 is the received first excitation signal, the capacitor CHM1 is the equivalent capacitance between the finger 300 and the sensing circuit 102, and the capacitor CHT1 is the equivalent capacitance between the finger 300 and the electrode 401. Since the equivalent capacitance between water and the sensing circuit 102, and between water and the electrode 401 is different from the equivalent capacitance between the finger 300 and the sensing circuit 102, and between the finger 300 and the electrode 401, the signal in the closed loop changes, that is, the sensing signal is generated, and the electrode 401 sends the sensing signal to the touch chip 101 through the pin of the touch chip 101, and the touch chip 101 identifies the touch position according to the sensing signal.

[0090] In the embodiment of the present application, the sensing loop 102 is connected to the third pin 10116 of the touch chip 101. The touch chip 101 can generate a first excitation signal based on the third driving signal, and transmit the first excitation signal to the sensing loop 102 through the third pin 10116. Thus, the first excitation signal with a large signal amplitude can be transmitted in the closed loop, so that the signal amplitude of the sensing signal generated in the closed loop is large, thereby improving the sensitivity of the touch device 100 to identify the touch position.

[0091] Fig.11 is a schematic diagram of another touch chip provided in an embodiment of the present application, such as Fig.11 As shown, the touch chip 101 includes a third switch K3 and a fourth switch K4, the third switch K3 is electrically connected to the second pin 10112 of the touch chip 101, one end of the fourth switch K4 is electrically connected to the second pin 10112, and the other end of the fourth switch K4 is grounded. When the third switch K3 is closed and the fourth switch K4 is opened, the touch chip 101 outputs the first drive signal to the level conversion unit 104, and when the third switch K3 is opened and the fourth switch K4 is closed, the touch chip 101 stops outputting the first drive signal to the level conversion unit 104.

[0092] The touch chip 101 includes a third switch K3 and a fourth switch K4. The third switch K3 is arranged between the second signal generator 1013 and the second pin 10112. One end of the second pin 10112 is connected to the third switch K3, and the other end of the second pin 10112 is electrically connected to the level conversion unit 104. One end of the fourth switch K4 is connected to the second pin 10112, and the other end of the fourth switch K4 is grounded. When the third switch K3 is closed and the fourth switch K4 is opened, the second signal generator 1013 in the touch chip 101 generates a first drive signal and transmits the first drive signal to the second pin 10112 through the closed third switch K3. The second pin 10112 sends the first drive signal to the level conversion unit 104 electrically connected to the second pin 10112, so that touch position recognition can be performed in underwater scenes.

[0093] When the fourth switch K4 is closed, the level conversion unit 104 is grounded through the second pin 10112 and the closed fourth switch K4. At this time, the touch chip 101 stops outputting the first drive signal to the level conversion unit 104. It should be understood that when the fourth switch K4 is closed, in order to prevent the touch chip 101 from leaking to the ground, the third switch K3 will be disconnected at this time. The touch chip 101 stops outputting the first drive signal to the level conversion unit 104 and then outputs the second drive signal to the electrode 401, so that touch position recognition can be performed in daily scenarios.

[0094] In the embodiment of the present application, the touch chip 101 includes a third switch K3 and a fourth switch K4. When the third switch K3 is closed and the fourth switch K4 is opened, the touch chip 101 outputs a first drive signal to the level conversion unit 104, thereby generating a third drive signal through the level conversion unit 104 to realize touch position recognition in underwater scenes. When the third switch K3 is opened and the fourth switch K4 is closed, the touch chip 101 stops outputting the first drive signal to the level conversion unit 104, and sends a second drive signal to the plurality of electrodes 401, thereby performing touch position recognition through self-capacitance or mutual capacitance of the plurality of electrodes 401 to realize touch position recognition in daily scenes. The touch chip 101 can control the on and off of the third switch K3 and the fourth switch K4 according to the switching signal sent by the processor to realize switching between the underwater touch recognition mode and the daily touch recognition mode. Therefore, it can be applied to touch position recognition in daily scenes and underwater scenes, so that the touch device 100 can be applied to touch position recognition in a variety of usage scenarios, and has high applicability.

[0095] Fig.12 is a schematic diagram of another touch chip provided in an embodiment of the present application, such as Fig.12 As shown, the touch chip 101 has a fifth switch K5 and a sixth switch K6, the fifth switch K5 is electrically connected to the third pin 10116 of the touch chip 101, one end of the sixth switch K6 is electrically connected to the third pin 10116, and the other end of the sixth switch K6 is grounded. When the fifth switch K5 is closed and the sixth switch K6 is disconnected, the touch chip 101 outputs the first excitation signal to the sensing circuit 102. When the fifth switch K5 is disconnected and the sixth switch K6 is closed, the touch chip 101 stops outputting the first excitation signal to the sensing circuit 102.

[0096] The touch chip 101 further includes a fifth switch K5 and a sixth switch K6. Fig.10 The touch chip 101 shown in the figure outputs the first excitation signal to the sensing loop 102. The fifth switch K5 is arranged between the third signal generator 1014 and the third pin 10116. One end of the third pin 10116 is connected to the fifth switch K5, and the other end of the third pin 10116 is electrically connected to the sensing loop 102. One end of the sixth switch K6 is connected to the third pin 10116, and the other end of the sixth switch K6 is grounded. When the fifth switch K5 is closed and the sixth switch K6 is opened, the third signal generator 1014 in the touch chip 101 generates a first excitation signal based on the third drive signal, and then transmits the first excitation signal to the third pin 10116 through the closed fifth switch K5. The third pin 10116 sends the first excitation signal to the sensing loop 102 electrically connected to the third pin 10116, so that touch position recognition can be performed in an underwater scene.

[0097] When the sixth switch K6 is closed, the sensing loop 102 is grounded through the third pin 10116 and the closed sixth switch K6. At this time, the sensing loop 102 is short-circuited by the ground wire, and the touch chip 101 stops outputting the first excitation signal to the sensing loop 102. It should be understood that when the sixth switch K6 is closed, in order to prevent the touch chip 101 from leaking electricity to the ground wire, the fifth switch K5 will be disconnected at this time. The touch chip 101 stops outputting the first excitation signal to the sensing loop 102 and then outputs the second drive signal to the electrode 401, so that touch position recognition can be performed in daily scenarios.

[0098] In the embodiment of the present application, the touch chip 101 includes a fifth switch K5 and a sixth switch K6. When the fifth switch K5 is closed and the sixth switch K6 is disconnected, the touch chip 101 outputs a first excitation signal to the induction loop 102 to realize touch position recognition in underwater scenes. When the fifth switch K5 is disconnected and the sixth switch K6 is closed, the touch chip 101 sends a second drive signal to the electrode 401 to realize touch position recognition in daily scenes. The touch chip 101 can control the on and off of the fifth switch K5 and the sixth switch K6 according to the switching signal sent by the processor to realize switching between the underwater touch recognition mode and the daily touch recognition mode. Therefore, it can be applicable to touch position recognition in daily scenes and underwater scenes, so that the touch device 100 can be applicable to touch position recognition in a variety of usage scenarios, and has high applicability.

[0099] Fig.13 is a schematic diagram of another touch device provided in an embodiment of the present application, such as Fig.13 As shown, the sensing circuit 102 is electrically connected to the first output pin 1042, the excitation signal is the third driving signal, the sensing circuit 102 can receive the third driving signal, and when the finger 300 performs touch control, the sensing circuit 102 forms a closed loop with the finger 300 and the electrode 401, and transmits the third driving signal in the closed loop to generate a sensing signal.

[0100] The third driving signal is a square wave signal generated by the level conversion unit 104 according to the first driving signal. The induction loop 102 is electrically connected to the first output pin 1042 of the level conversion unit 104. The level conversion unit 104 sends the third driving signal to the induction loop 102 through the first output pin 1042. The equivalent circuit diagram is as follows: Figure 5 As shown, when the finger 300 performs touch control, the sensing loop 102 forms a closed loop with the finger 300 and the electrode 401. The electrode 401 can be a horizontal electrode and / or a vertical electrode. Figure 5The equivalent signal source L1 is the received first excitation signal, such as the third driving signal in the embodiment of the present application, the capacitor CHM1 is the equivalent capacitance between the finger 300 and the sensing circuit 102, and the capacitor CHT1 is the equivalent capacitance between the finger 300 and the electrode 401. Since the equivalent capacitance between water and the sensing circuit 102, and between water and the electrode 401 is different from the equivalent capacitance between the finger 300 and the sensing circuit 102, and between the finger 300 and the electrode 401, the signal in the closed loop changes, that is, the sensing signal is generated, and the electrode 401 sends the sensing signal to the touch chip 101 through the pin of the touch chip 101, and the touch chip 101 identifies the touch position according to the sensing signal.

[0101] In the embodiment of the present application, the sensing circuit 102 is electrically connected to the first output pin 1042, so that the level conversion unit 104 can output the third drive signal generated according to the first drive signal as the first excitation signal to the sensing circuit 102, thereby enabling underwater touch position recognition to be performed through the sensing circuit 102. Compared with the solution in which the touch chip 101 generates the first excitation signal based on the third drive signal in the above embodiment, there is no need to additionally set a signal generator in the touch chip 101, so the cost is lower.

[0102] In a possible implementation, the fourth pin of the touch chip 101 is connected to the electrode 401, and the touch chip 101 can output a second excitation signal to the electrode 401 according to the third driving signal. The electrode 401 is used to receive the second excitation signal. When the finger 300 touches, the sensing circuit 102 forms a closed loop with the finger 300 and the electrode 401, and transmits the second excitation signal and the first excitation signal in the closed loop to generate a sensing signal.

[0103] The fourth pin of the touch chip 101 is connected to the electrode 401. The touch chip 101 generates a second excitation signal according to the third driving signal. The second excitation signal can be a signal with a sine wave waveform, a square wave waveform, a trapezoidal wave waveform, etc. The generation principle of the second excitation signal is similar to the generation principle of the first excitation signal, which will not be repeated here.

[0104] After the touch chip 101 generates the second excitation signal, it sends the second excitation signal to the electrode 401. When the finger 300 performs touch control, the sensing circuit 102 forms a closed loop with the finger 300 and the electrode 401. At this time, since the sensing circuit 102 receives the first excitation signal (such as the first excitation signal) from the touch chip 101 or the level conversion unit 104, the sensing circuit 102 is closed. Fig.10 or Fig.13 As shown), the electrode 401 receives the second excitation signal from the touch control unit, so the first excitation signal and the second excitation signal are transmitted in the closed loop to generate a sensing signal.

[0105] Fig.14 is a schematic diagram of an equivalent circuit diagram of another closed loop provided in an embodiment of the present application, such as Fig.14 As shown, when the finger 300 performs touch control, the sensing loop 102 forms a closed loop with the finger 300 and the electrode 401. The electrode 401 can be a horizontal electrode and / or a vertical electrode. Fig.14 The equivalent signal source L1 is the received first excitation signal, the equivalent signal source L2 is the received second excitation signal, the capacitor CHM1 is the equivalent capacitance between the finger 300 and the sensing circuit 102, and the capacitor CHT1 is the equivalent capacitance between the finger 300 and the electrode 401. Since the equivalent capacitance between water and the sensing circuit 102, and between water and the electrode 401 is different from the equivalent capacitance between the finger 300 and the sensing circuit 102, and between the finger 300 and the electrode 401, the signal in the closed loop changes, that is, the sensing signal is generated, and the electrode 401 sends the sensing signal to the touch chip 101 through the pin of the touch chip 101, and the touch chip 101 identifies the touch position according to the sensing signal.

[0106] It should be understood that although the electrode 401 is more sensitive to water when identifying touch commands by self-capacitance and / or mutual capacitance, since the second excitation signal in the electrode 401 only serves as a supplementary signal in the closed loop, and since the second excitation signal is generated based on the third drive signal on the ground pin 10113 rather than based on 0V, the signal amplitude of the second excitation signal is relatively large, which can make the electrode 401 generate a certain induction signal. Therefore, it can serve as a supplement in the closed loop, so that the signal amount and signal amplitude of the induction signal output by the electrode 401 are larger.

[0107] In the embodiment of the present application, multiple fourth pins of the touch chip 101 are connected to the electrode 401. The touch chip 101 can output a second excitation signal to the electrode 401 according to the third driving signal, thereby transmitting the second excitation signal in a closed loop. Since the sensing loop 102 receives the first excitation signal, the first excitation signal and the second excitation signal are transmitted simultaneously in the closed loop, so that the signal amplitude of the sensing signal generated in the closed loop is larger, thereby improving the sensitivity of the touch device 100 in identifying the touch position.

[0108] In one possible implementation, Figures 2 to 14 As shown, the induction loop 102 includes a first induction loop 1021 and a second induction loop 1022 . A first end of the first induction loop 1021 and a first end of the second induction loop 1022 receive a first excitation signal, and a second end of the first induction loop 1021 is connected to a second end of the second induction loop 1022 .

[0109] The first end of the first induction loop 1021 and the first end of the second induction loop 1022 can be connected to the first output pin 1042 of the level conversion unit 104, the first pin 10111 of the touch control chip 101, and one of the third pin 10116 of the touch control chip 101 to receive the first excitation signal, and the second ends of the first induction loop 1021 and the second induction loop 1022 are connected.

[0110] by Figure 5 and Fig.14 As an example of the equivalent circuit diagram shown in FIG. Figure 5 and Fig.14 When the left side of the touch is performed, the first sensing loop 1021, the finger 300 and the electrode 401 form a closed loop. Figure 5 and Fig.14 When the right side of the image is touched, the second sensing loop 1022, the finger 300 and the electrode 401 form a closed loop, and the specific principle of generating the sensing signal is similar to that in the above embodiment, which will not be repeated here.

[0111] In the embodiment of the present application, the induction loop includes a first induction loop 1021 and a second induction loop 1022. The first end of the first induction loop 1021 and the first end of the second induction loop 1022 receive the first excitation signal, thereby preventing the first excitation signal from causing signal loss in the induction loop. Compared with setting up one induction loop, since the signal loss of the induction signal is large when it is transmitted in one induction loop, setting up the first induction loop 1021 and the second induction loop 1022 can increase the signal strength of the first excitation signal in the induction loop, thereby making the signal strength of the induction signal generated in the closed loop higher, and can improve the sensitivity of the touch detection device in touch position recognition underwater.

[0112] Fig.15 is a circuit diagram of a level conversion unit provided in an embodiment of the present application, such as Fig.15 As shown, the level conversion unit 104 includes N sub-circuits, where N is an integer greater than or equal to 2. The first sub-circuit of the N sub-circuits includes a seventh switch K7, an eighth switch K8 and a first capacitor C1. A first end of the seventh switch K7 is connected to the power supply AVDD, a second end of the seventh switch K7 is connected to the second output pin 1043, a first end of the first capacitor C1 is connected to the second output pin 1043, a second end of the first capacitor C1 is respectively connected to a first end of the eighth switch K8 and the first output pin 1042, and a second end of the eighth switch K8 is grounded.

[0113] The i-th subcircuit among the N subcircuits includes a ninth switch K9, a tenth switch K10, an eleventh switch K11 and a second capacitor C2, a first end of the ninth switch K9 is connected to a power supply AVDD, a second end of the ninth switch K9 is connected to a first end of the tenth switch K10, a second end of the tenth switch K10 is connected to a second end of a capacitor in an (i-1)-th subcircuit, a first end of the second capacitor C2 is connected to a second end of the ninth switch K9, a second end of the second capacitor C2 is connected to a first end of the eleventh switch K11, and a second end of the eleventh switch K11 is grounded, wherein i is an integer greater than 1 and less than N.

[0114] The Nth sub-circuit among the N sub-circuits includes a twelfth switch K12, a first end of the twelfth switch K12 is connected to the power supply AVDD, and a second end of the twelfth switch K12 is connected to the second end of the capacitor in the N-1th sub-circuit;

[0115] The level conversion unit 104 is used to control the on-off of switches in the N sub-circuits according to the first drive signal, so that the on-off states of the seventh switch K7, the eighth switch K8, the ninth switch K9 and the eleventh switch K11 are the same, and the on-off states of the tenth switch K10 and the twelfth switch K12 are the same, and the on-off states of the seventh switch K7 and the twelfth switch K12 are opposite, and the low level of the third drive signal is generated at the first output pin 1042 when the seventh switch K7 is closed, and the high level of the third drive signal is generated at the first output pin 1042 when the twelfth switch K12 is closed, and the output voltage of the power supply AVDD is equal to the supply voltage of the touch chip 101.

[0116] The level conversion unit 104 controls the on and off of switches in the N sub-circuits according to the first driving signal. In an example, when the first driving signal is at the first level, the seventh switch K7, the eighth switch K8, the ninth switch K9 and the eleventh switch K11 are closed, and the tenth switch K10 and the twelfth switch K12 are opened. At this time, the capacitors in the circuit are charged by the power supply AVDD. When the first driving signal is at the second level, the seventh switch K7, the eighth switch K8, the ninth switch K9 and the eleventh switch K11 are opened, and the tenth switch K10 and the twelfth switch K12 are closed. The capacitors and the power supply AVDD jointly output voltages to the first output pin 1042 and the second output pin 1043 of the level conversion unit 104. It should be understood that since the first output pin 1042 and the second output pin 1043 are connected to the first capacitor C1, the first output pin 1042 and the second output pin 1043 have a constant phase difference of the voltage output by the first capacitor C1.

[0117] The following description will be made by taking the output voltage of the power supply AVDD as 3V and taking N=2 and N=3 as examples.

[0118] Fig.16is a schematic diagram of an example of a level conversion unit provided in an embodiment of the present application, such as Fig.16 As shown, when N = 2, there are only the first subcircuit and the second subcircuit, as Fig.16 As shown in (a) of FIG. 1 , when the first driving signal is at the first level, the seventh switch K7 and the eighth switch K8 are closed, and the twelfth switch K12 is opened. At this time, the power supply AVDD charges the first capacitor C1, and the charging voltage of the first capacitor C1 is 3V. The first output pin 1042 outputs a voltage of 0V, and the voltage output by the second output pin 1043 is the output voltage 3V of the power supply AVDD connected to the seventh switch K7. Fig.16 As shown in (b), when the first driving signal is at the second level, the seventh switch K7 and the eighth switch K8 are disconnected, and the twelfth switch K12 is closed. The power supply AVDD connected to the twelfth switch K12 and the first capacitor C1 together output an output voltage of 6V of twice the power supply AVDD to the second output pin 1043. The power supply AVDD connected to the twelfth switch K12 outputs an output voltage of 3V of 1 times the AVDD to the first output pin 1042. The voltage difference between the first output pin 1042 and the second output pin 1043 is 3V, which supplies power to the touch chip 101. Since the first driving signal is a square wave signal, the first output pin 1042 outputs a third driving signal of 0V-3V.

[0119] Fig.17 is a schematic diagram of another example of a level conversion unit provided in an embodiment of the present application, such as Fig.17 As shown, when N=3, there are the first subcircuit, the second subcircuit and the third subcircuit, as shown in Fig.17 As shown in (a) of FIG. 1 , when the first driving signal is at the first level, the seventh switch K7, the eighth switch K8, the ninth switch K9 and the eleventh switch K11 are closed, and the tenth switch K10 and the twelfth switch K12 are opened. At this time, the power supply AVDD charges the first capacitor C1 and the second capacitor C2, and the charging voltage of the first capacitor C1 and the second capacitor C2 is 3V. The first output pin 1042 outputs a voltage of 0V, and the voltage output by the second output pin 1043 is the output voltage 3V of the power supply AVDD connected to the seventh switch K7. Fig.17As shown in (b), when the first driving signal is at the second level, the seventh switch K7, the eighth switch K8, the ninth switch K9 and the eleventh switch K11 are disconnected, and the tenth switch K10 and the twelfth switch K12 are closed. The power supply AVDD, the first capacitor C1 and the second capacitor C2 connected to the twelfth switch K12 together output a voltage of 9V, which is three times the output voltage of the power supply AVDD, to the second output pin 1043. The power supply AVDD connected to the twelfth switch K12 and the second capacitor C2 together output a voltage of 6V, which is twice the output voltage of the power supply AVDD, to the first output pin 1042. The voltage difference between the first output pin 1042 and the second output pin 1043 is 3V, which supplies power to the touch chip 101. Since the first driving signal is a square wave signal, the first output pin 1042 outputs a third driving signal of 0V-6V.

[0120] Fig.18 is a schematic diagram of an output voltage timing provided by an embodiment of the present application, such as Fig.18 As shown, when the first drive signal is at a low level, the second output pin 1043 outputs the AVDD output voltage, and the first output pin 1042 outputs a 0V voltage. When the first drive signal is at a high level, the second output pin 1043 outputs N times the AVDD output voltage, and the first output pin 1042 outputs N-1 times the AVDD output voltage, where N is the number of sub-circuits.

[0121] In the embodiment of the present application, by controlling the on and off of switches in N sub-circuits, the first output pin 1042 of the level conversion unit outputs a third drive signal, and the second output pin 1043 outputs a power supply AVDD voltage whose output voltage difference with the first output pin 1042 is a constant value, thereby realizing the generation of the third drive signal and realizing constant voltage power supply to the touch control chip 101.

[0122] Fig.19 is a circuit diagram of another level conversion unit provided in an embodiment of the present application, such as Fig.19As shown, the level conversion unit 104 includes: a thirteenth switch K13, a fourteenth switch K14, a fifteenth switch K15, a third capacitor C3 and a direct current voltage conversion unit DC / DC, a first end of the thirteenth switch K13 is connected to the power supply AVDD, a second end of the thirteenth switch K13 is connected to the second output pin 1043, a first end of the third capacitor C3 is connected to the second output pin 1043, a second end of the third capacitor C3 is respectively connected to the first end of the fourteenth switch K14 and the first output pin 1042, a second end of the fourteenth switch K14 is grounded, an input end of the direct current voltage conversion unit DC / DC is connected to the power supply AVDD, an output end of the direct current voltage conversion unit DC / DC is connected to a first end of the fifteenth switch K15, and the fifteenth switch K14 is connected to a first end of the fifteenth switch K15. The second end of the first capacitor C5 is connected to the second end of the third capacitor C3, the DC voltage conversion unit DC / DC can step up or step down the output voltage of the power supply AVDD, the level conversion unit 104 is used to control the on and off of the thirteenth switch K13, the fourteenth switch K14 and the fifteenth switch K15 according to the first driving signal, so that the on and off states of the thirteenth switch K13 and the fourteenth switch K14 are the same, and the on and off states of the thirteenth switch K13 and the fifteenth switch K15 are opposite, when the thirteenth switch K13 is closed, a low level of the third driving signal is generated at the first output pin 1042, when the fifteenth switch K15 is closed, a high level of the third driving signal is generated at the first output pin 1042, and the output voltage of the power supply AVDD is equal to the supply voltage of the touch control chip 101.

[0123] In one example, if Fig.19 As shown in (a) of FIG. 1 , when the first driving signal is at the first level, the thirteenth switch K13 and the fourteenth switch K14 are closed, and the fifteenth switch K15 is opened. At this time, the third capacitor C3 in the circuit is charged by the power supply AVDD, as shown in FIG. Fig.19 As shown in (b) in the figure, when the first driving signal is at the second level, the thirteenth switch K13 and the fourteenth switch K14 are disconnected, and the fifteenth switch K15 is closed, and the third capacitor C3 and the DC voltage conversion unit DC / DC jointly output a voltage to the first output pin 1042 and the second output pin 1043 of the level conversion unit 104. It should be understood that since the third capacitor C3 is connected to the first output pin 1042 and the second output pin 1043, the first output pin 1042 and the second output pin 1043 have a constant phase difference of the voltage output by the third capacitor C3.

[0124] The following example takes the power supply AVDD outputting a 3V voltage, and the DC voltage conversion unit DC / DC boosting the output voltage of the power supply AVDD by M times. Fig.19As shown in (a) of FIG. 1 , when the first driving signal is at the first level, the thirteenth switch K13 and the fourteenth switch K14 are closed, and the fifteenth switch K15 is opened. At this time, the power supply AVDD charges the third capacitor C3, and the charging voltage of the third capacitor C3 is 3V. The first output pin 1042 outputs a voltage of 0V, and the second output pin 1043 outputs an output voltage of 3V of the power supply AVDD connected to the thirteenth switch K13. Fig.19 As shown in (b), when the first driving signal is at the second level, the thirteenth switch K13 and the fourteenth switch K14 are disconnected, and the fifteenth switch K15 is closed. The DC voltage conversion unit DC / DC connected to the fifteenth switch K15 and the third capacitor C3 together output M+1 times the output voltage 3*(M+1)V of the power supply AVDD to the second output pin 1043. The DC voltage conversion unit DC / DC connected to the fifteenth switch K15 outputs M times the output voltage 3*MV of the power supply AVDD to the first output pin 1042. The voltage difference between the first output pin 1042 and the second output pin 1043 is 3V, which supplies power to the touch chip 101. Since the first driving signal is a square wave signal, the first output pin 1042 outputs a third driving signal of 0V-3*MV at this time. It should be understood that since the boost or buck of the output voltage of the power supply AVDD by the DC voltage conversion unit DC / DC may not be an integer multiple of the boost or buck, M is a natural number greater than or equal to 0.

[0125] It should be understood that the DC voltage conversion unit DC / DC can be a boost circuit, for example: a boost DC / DC circuit, or the DC voltage conversion unit DC / DC can be a step-down circuit, for example: a buck DC / DC circuit. The specific circuit can be set as needed. It should also be understood that the scheme of the DC voltage conversion unit DC / DC stepping down the output voltage of the power supply AVDD is similar in principle to the scheme of the DC voltage conversion unit DC / DC in the above embodiment stepping up the output voltage of the power supply AVDD, and will not be repeated here.

[0126] In the embodiment of the present application, by controlling the on and off of the thirteenth switch K13, the fourteenth switch K14 and the fifteenth switch K15, the first output pin 1042 of the level conversion unit 104 outputs the third drive signal, and the second output pin 1043 outputs the power supply AVDD voltage whose output voltage difference with the first output pin 1042 is a constant value, thereby realizing the generation of the third drive signal and realizing constant voltage power supply to the touch chip 101.

[0127] Fig. 20 is a schematic diagram of a touch screen provided in an embodiment of the present application, such as Fig. 20As shown, the touch device further includes a ground loop 105, which is located in the touch screen. In the touch screen, the sensing loop 102, the ground loop 105 and the electrode 401 are located in the same layer, the ground loop 105 is located between the sensing loop 102 and the electrode 401, and the ground loop 105 is grounded.

[0128] The touch screen may further include a ground loop 105. The ground loop 105 may have a structure similar to that of the induction loop 102. The ground loop 105 is grounded. The induction loop 102, the ground loop 105 and the electrode 401 are located on the same layer. In one example, the ground loop 105, the induction loop 102 and the electrode 401 may be formed on an organic packaging layer of the display screen. Specifically, metal may be deposited on the organic packaging layer to obtain the ground loop 105, the induction loop 102 and the electrode 401.

[0129] In the embodiment of the present application, the touch control device further includes a grounding loop 105, which is located between the sensing loop 102 and the electrode 401, thereby providing a shielding effect, preventing the first excitation signal received by the sensing loop 102 from being directly coupled to the electrode 401, thereby improving the dynamic range of the sensing signal generated in the electrode 401 and improving the strength of the sensing signal.

[0130] Fig.21 is a schematic diagram of another touch chip provided in an embodiment of the present application, such as Fig.21 As shown, the touch chip 101 includes a current conversion unit 1016 and a processing unit 1015. The current conversion unit 1016 can generate an identification signal according to the sensing signal, and the processing unit 1015 can identify the touch position according to the identification signal.

[0131] In the embodiment of the present application, the touch chip 101 includes a current conversion unit 1016 and a processing unit 1015, so that the current conversion unit 1016 can receive the sensing signal and convert the sensing signal into an identification signal. The processing unit 1015 can identify the touch position according to the identification signal, thereby realizing the identification of the touch position.

[0132] Fig. 22 is a circuit diagram of a current conversion unit provided in an embodiment of the present application, such as Fig. 22As shown, the current conversion unit includes a transimpedance amplifier D1, a first resistor R1, a second resistor R2, a first feedback resistor Rf1, a second feedback resistor Rf2, a fourth capacitor C4, a fifth capacitor C5 and an analog-to-digital converter 10161, a first end of the first resistor R1 is connected to the electrode, a second end of the first resistor R1 is connected to the positive input end of the transimpedance amplifier D1, a first end of the second resistor R2 is connected to the reference voltage VCMI, a second end of the second resistor R2 is connected to the negative input end of the transimpedance amplifier D1, a negative output end of the transimpedance amplifier D1 is connected to the first input end of the analog-to-digital converter 10161, a positive output end of the transimpedance amplifier D1 is connected to the second input end of the analog-to-digital converter 10161, a first end of the first feedback resistor Rf1 is connected to the positive electrode of the transimpedance amplifier D1 The input end is connected, the second end of the first feedback resistor Rf1 is connected to the negative output end of the transimpedance amplifier D1, the first end of the second feedback resistor Rf2 is connected to the negative input end of the transimpedance amplifier D1, the second end of the second feedback resistor Rf2 is connected to the positive output end of the transimpedance amplifier D1, the first end of the fourth capacitor C4 is connected to the first end of the first feedback resistor Rf1, the second end of the fourth capacitor C4 is connected to the second end of the first feedback resistor Rf1, the first end of the fifth capacitor C5 is connected to the first end of the second feedback resistor Rf2, the second end of the fifth capacitor C5 is connected to the second end of the second feedback resistor Rf2, the transimpedance amplifier D1 can convert the sensing signal into an identification voltage, the analog-to-digital converter 10161 can receive the identification voltage, and convert the identification voltage into an identification signal.

[0133] In one example, the sensing signal is a current signal, and the identification current can be converted into a square wave signal through the feedback resistor, the capacitor and the transimpedance amplifier D1. Specifically, the identification current acts on the feedback resistor, and 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 10161.

[0134] In the embodiment of the present application, the identification current can be amplified through the transimpedance amplifier D1, and the induced signal can be converted into an identification voltage. The identification voltage can be converted into a digital signal through the analog-to-digital converter 10161, thereby converting the identification current into an identification signal, so that the processor can identify the touch instruction according to the identification signal, thereby realizing touch recognition.

[0135] Fig.23 is a circuit diagram of another current conversion unit provided in an embodiment of the present application, such as Fig.23As shown, the current conversion unit 1016 also includes: a low-pass filter 10162, a first input end of the low-pass filter 10162 is connected to the negative output end of the transimpedance amplifier D1, a second input end of the low-pass filter 10162 is connected to the positive output end of the transimpedance amplifier D1, a first output end of the low-pass filter 10162 is connected to the first input end of the analog-to-digital converter 10161, and a second output end of the low-pass filter 10162 is connected to the second input end of the analog-to-digital converter 10161. The low-pass filter 10162 can perform low-pass filtering on the identification voltage to reduce external signal interference in the identification voltage.

[0136] In an embodiment of the present application, the current conversion unit 1016 also includes a low-pass filter 10162, which can perform low-pass filtering on the identification voltage to reduce external signal interference in the identification voltage, for example: filtering out out-of-band signal interference or signal noise, while also preventing the Nyquist aliasing effect and improving the signal-to-noise ratio of the identification voltage input to the analog-to-digital converter 10161. The identification signal converted by the analog-to-digital converter 10161 can contain fewer identification signals corresponding to external signal interference, thereby reducing the impact of external signal interference on touch recognition and improving the accuracy of touch recognition.

[0137] Fig.24 is a circuit diagram of another current conversion unit provided in an embodiment of the present application, such as Fig.24 As shown, the current conversion unit 1016 also includes: a sampling and holding module 10163, the sampling and holding module 10163 includes a sixteenth switch K16, a seventeenth switch K17, an eighteenth switch K18, a nineteenth switch K19, a sixth capacitor C6 and a seventh capacitor C7, a first end of the sixteenth switch K16 is connected to the first output end of the low-pass filter 10162, a second end of the sixteenth switch K16 is simultaneously connected to the first end of the sixth capacitor C6 and the first end of the seventeenth switch K17, a second end of the seventeenth switch K17 is connected to the first input end of the analog-to-digital converter 10161, a second end of the sixth capacitor C6 is grounded, a first end of the eighteenth switch K18 is connected to the second output end of the low-pass filter 10162, a second end of the eighteenth switch K18 is simultaneously connected to the first end of the seventh capacitor C7 and the first end of the nineteenth switch K19, a second end of the nineteenth switch K19 is connected to the second input end of the analog-to-digital converter 10161, a second end of the seventh capacitor C7 is grounded, and the sampling and holding module 10163 can hold the identification voltage.

[0138] Since the sensing signal is a changing signal, the identification voltage output by the transimpedance amplifier D1, that is, the square wave signal is a changing square wave signal. In order to ensure that all signals are input to the analog-to-digital converter 10161 and converted into identification signals, a sampling and holding circuit is provided. When the analog-to-digital converter 10161 performs digital-to-analog conversion, the subsequent identification voltage can be temporarily stored to avoid the analog-to-digital converter 10161 missing part of the identification voltage due to the change of the identification voltage. Specifically, when the analog-to-digital converter 10161 performs digital-to-analog conversion, the seventeenth switch K1 can be The sixteenth switch K16 and / or the eighteenth switch K18 are disconnected, and the seventeenth switch K17 and / or the nineteenth switch K19 are disconnected, and the identification voltage is temporarily stored in the sixth capacitor C6 and the seventh capacitor C7. When the analog-to-digital converter 10161 is idle, the sixteenth switch K16 and / or the eighteenth switch K18 are disconnected, and the seventeenth switch K17 and / or the nineteenth switch K19 are closed, so that the analog-to-digital converter 10161 receives the identification voltage temporarily stored in the capacitor, and the sampling and holding effect is achieved through the sixteenth switch K16, the seventeenth switch K17, the eighteenth switch K18, the nineteenth switch K19, the sixth capacitor C6 and the seventh capacitor C7.

[0139] In the embodiment of the present application, the current conversion unit 1016 also includes a sampling and holding module 10163. The sampling and holding module 10163 can sample and hold the identification voltage output by the transimpedance amplifier D1 through the sixteenth switch K16, the seventeenth switch K17, the eighteenth switch K18, the nineteenth switch K19, the sixth capacitor C6 and the seventh capacitor C7. This can avoid the change of the identification voltage due to the change of the sensing signal, causing the analog-to-digital converter 10161 to miss part of the identification voltage, and can ensure that the analog-to-digital converter 10161 converts all the identification voltages into identification signals, thereby improving the accuracy of touch recognition.

[0140] Fig.25 is a circuit diagram of another current conversion unit provided in an embodiment of the present application, such as Fig.25 As shown, the current conversion unit 1016 also includes: a buffer amplifier 10164, a first input terminal of the buffer amplifier 10164 is connected to the second terminal of the seventeenth switch K17, a second input terminal of the buffer amplifier 10164 is connected to the second terminal of the nineteenth switch K19, a first output terminal of the buffer amplifier 10164 is connected to the first input terminal of the analog-to-digital converter 10161, a second output terminal of the buffer amplifier 10164 is connected to the second input terminal of the analog-to-digital converter 10161, and the buffer amplifier 10164 can perform signal amplification processing on the identification voltage.

[0141] In the embodiment of the present application, the current conversion unit 1016 also includes a buffer amplifier 10164. The buffer amplifier 10164 can amplify the identification voltage signal. The buffer amplifier 10164 can be a level converter or a buffer, etc. Specifically, the high level in the identification voltage can be increased and the low level can be reduced to achieve amplification of the signal amplitude, thereby making the identification voltage signal amplitude of the input analog-to-digital converter 10161 larger, avoiding the inability to identify touch due to the small identification voltage that makes the analog-to-digital converter 10161 unable to convert into an identification signal, thereby improving the accuracy of touch recognition.

[0142] An embodiment of the present application also provides a touch chip, which is used to output a first drive signal and respond to a first excitation signal according to an induction circuit. When a finger touches the touch screen, the induction circuit, the finger, and electrodes on the touch screen form a closed loop, and the touch position is identified by the induction signal generated in the closed loop, wherein the first excitation signal is obtained according to the first drive signal, and the induction circuit is located in the touch screen.

[0143] In the embodiment of the present application, the touch control chip 101 may be the touch control chip 101 in any of the above embodiments, and may perform the operations in any of the above embodiments, which will not be described in detail herein.

[0144] Fig.26 is a schematic diagram of a display screen module provided in an embodiment of the present application, such as Fig.26 As shown, the display screen module 400 includes an electrode 401 and the touch device 100 in any of the above embodiments, and the electrode 401 is used to form a closed loop with the sensing circuit 102 and the finger when the finger touches, wherein the electrode 401 includes horizontal electrodes and / or vertical electrodes arranged on the touch screen.

[0145] Fig. 27 is a schematic diagram of an electronic device provided in an embodiment of the present application, such as Fig. 27 As shown, the electronic device 200 includes a processor 201 and the 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 control device 100, so that the touch control chip 101 in the touch control device 100 outputs a first drive signal to the sensing circuit 102 or outputs a second drive signal to the electrode 401.

[0146] In an embodiment of the present application, the processor 201 can send a switching signal to the touch control device 100, so that the touch control chip 101 in the touch control device 100 outputs a first drive signal to the sensing circuit 102 or outputs a second drive signal to the electrode 401, thereby switching between daily use scenarios and underwater use scenarios. Since the conventional touch mode and the underwater touch mode are switched according to the switching signal, it can be applicable to touch position recognition in daily scenes and underwater scenes, and can be applicable to touch position recognition in a variety of usage scenarios, and has high applicability.

[0147] Fig.28 is a rendering of a touch position recognition provided by an embodiment of the present application, Fig.28 Applicable to the effects produced in any embodiment of the present application, such as Fig.28 As shown, Fig.28 (a) in the figure indicates the signal amount of the touch signal. Fig.28 In (a), the curve 2801 represents the reference signal, the curve 2802 represents the sensing signal generated by the touch device during touch recognition under water, and the curve 2803 represents the standard signal of the manufacturer, that is, the signal for detecting the touch position through the electrode in daily scenes, such as Fig.28 As shown in (a) in FIG. 2 , curve 2802 is close to curve 2803 , so a better touch recognition result can be obtained underwater. Fig.28 (b) in FIG. 1 represents the detection of the finger coordinates when the finger slides on the screen in underwater mode, such as Fig.28 As shown in (b), the finger can be detected in different coordinates in different detection frames, and the effect of touch position detection underwater is better.

[0148] 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 each other, and each embodiment focuses on the differences from other embodiments. In particular, for the method embodiment, since it is basically similar to the method described in the device and system embodiments, the description is relatively simple, and the relevant parts can be referred to the partial description of other embodiments.

[0149] It should be understood that the above is a description of a specific embodiment of the present specification. Other embodiments are within the scope of the claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0150] It should be understood that an element described in singular form herein or shown in the drawings as only one does not limit the number of the element to one. In addition, 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 split into multiple modules or elements.

[0151] It should also be understood that the terms and expressions used herein are for description only, and one or more embodiments of this specification should not be limited to these terms and expressions. The use of these terms and expressions does not mean to exclude any equivalent features of the illustrations and descriptions (or parts thereof), and it should be recognized that various modifications that may exist should also be included in the scope of the claims. Other modifications, changes and substitutions may also exist. Accordingly, the claims should be deemed to cover all such equivalents.

Claims

1. A touch device, characterized in that: include: A touch chip, wherein the touch chip is used to output a first driving signal; An induction loop, wherein the induction loop is used to receive a first excitation signal, and when a finger touches the touch screen, the induction loop, the finger, and electrodes on the touch screen form a closed loop, and an induction signal is generated in the closed loop, and the touch chip identifies the touch position according to the induction signal, wherein the first excitation signal is obtained according to the first drive signal, the induction loop is located in the touch screen, and the electrodes include multiple horizontal electrodes and / or multiple vertical electrodes.

2. The touch control device according to claim 1, characterized in that: The induction loop is used to perform crack detection on the touch screen, and / or the induction loop and the electrode are located in the same layer in the touch screen.

3. The touch control device according to claim 1, characterized in that: When the touch chip receives a switching signal from a processor in the electronic device, the touch chip stops outputting the first driving signal, sends a second driving signal to the electrode, and performs position recognition according to the touch signal output by the electrode.

4. The touch control device according to claim 3, characterized in that: When the electronic device is in an underwater mode, the touch control chip outputs the first driving signal, and when the electronic device is in a non-underwater mode, the touch control chip sends a second driving signal to the electrode.

5. The touch control device according to claim 3, characterized in that: 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 signal output by the other of the plurality of horizontal electrodes and the plurality of vertical electrodes; Or at least one of the multiple horizontal electrodes and the multiple 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 signal output by the receiving electrode.

6. The touch control device according to claim 3, characterized in that: The induction loop is connected to the first pin of the touch chip, and the excitation signal is the first driving signal; The sensing circuit is used to receive the first driving signal. When the finger performs touching, the sensing circuit, the finger and the electrode form the closed circuit, and the first driving signal is transmitted in the closed circuit to generate the sensing signal.

7. The touch control device according to claim 6, characterized in that: The touch control chip includes: a first switch and a second switch; The first switch is electrically connected to the first pin, 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 control chip outputs the first driving signal to the sensing circuit; When the first switch is opened and the second switch is closed, the touch control chip stops outputting the first driving signal to the sensing loop and sends the second driving signal to the electrode.

8. The touch control device according to claim 6, characterized in that: The touch control device further includes a signal amplification module; The input end of the signal amplifying module is connected to the first pin of the touch control chip, and the output end of the signal amplifying module is connected to the induction loop; The signal amplification module is used to perform level amplification processing on the first driving signal, and send the amplified first driving signal to the induction loop, so as to transmit the amplified first driving signal in the closed loop.

9. The touch control device according to claim 3, characterized in that: The touch control device further includes: a level conversion unit; The input pin of the level conversion unit is electrically connected to the second pin of the touch control chip, the first output pin of the level conversion unit is electrically connected to the ground pin of the touch control chip, and the second output pin of the level conversion unit is connected to the power supply pin of the touch control chip; The level conversion unit is used to receive the first drive signal output by the touch control chip through the second pin, generate a third drive signal according to the first drive signal, output the third drive signal to the ground pin through the first output pin, and transmit the power supply voltage to the touch control chip through the power supply pin, wherein the voltage difference between the power supply voltage and the third drive signal is equal to the power supply voltage of the touch control chip.

10. The touch control device according to claim 9, characterized in that: The sensing loop is connected to the third pin of the touch chip; The touch control chip is used to generate the first excitation signal based on the third driving signal, and transmit the first excitation signal to the induction loop through the third pin; Alternatively, the induction loop is electrically connected to the first output pin, and the excitation signal is the third driving signal; The sensing circuit is used to receive the third driving signal. When the finger performs touching, the sensing circuit, the finger and the electrode form the closed circuit, and the third driving signal is transmitted in the closed circuit to generate the sensing signal.

11. The device according to claim 9, characterized in that The touch chip includes a third switch and a fourth switch; The third switch is electrically connected to the second pin of the touch chip, one end of the fourth switch is electrically connected to the second pin, and the other end of the fourth switch is grounded; When the third switch is closed and the fourth switch is open, the touch control chip outputs the first driving signal to the level conversion unit; When the third switch is opened and the fourth switch is closed, the touch control chip stops outputting the first driving signal to the level conversion unit.

12. The touch control device according to claim 10, characterized in that: The touch control chip includes: a fifth switch and a sixth switch; The fifth switch is electrically connected to the third pin of the touch chip, one end of the sixth switch is electrically connected to the third pin, and the other end of the sixth switch is grounded; When the fifth switch is closed and the sixth switch is open, the touch control chip outputs the first excitation signal to the sensing loop; When the fifth switch is opened and the sixth switch is closed, the touch control chip stops outputting the first excitation signal to the sensing loop.

13. The touch control device according to any one of claims 9 to 12, characterized in that: The fourth pin of the touch chip is connected to the electrode; The touch control chip is used to output a second excitation signal to the electrode according to the third driving signal; The electrode is used to receive the second excitation signal. When the finger performs touching, the sensing circuit forms the closed loop with the finger and the electrode, and transmits the second excitation signal and the first excitation signal in the closed loop to generate the sensing signal.

14. The touch control device according to any one of claims 1 to 12, characterized in that: The induction loop includes a first induction loop and a second induction loop; The first end of the first induction loop and the first end of the second induction loop receive the first excitation signal, and the second end of the first induction loop is connected to the second end of the second induction loop.

15. The touch control device according to claim 9, characterized in that: The level conversion unit includes N sub-circuits, where N is an integer greater than or equal to 2; The first subcircuit of the N subcircuits comprises a seventh switch, an eighth switch and a first capacitor, wherein a first end of the seventh switch is connected to a power source, a second end of the seventh switch is connected to the second output pin, a first end of the first capacitor is connected to the second output pin, a second end of the first capacitor is connected to a first end of the eighth switch and the first output pin respectively, and a second end of the eighth switch is grounded; The i-th subcircuit among the N subcircuits comprises a ninth switch, a tenth switch, an eleventh switch and a second capacitor, a first end of the ninth switch is connected to the power supply, a second end of the ninth switch is connected to a first end of the tenth switch, a second end of the tenth switch is connected to a second end of a capacitor in an (i-1)-th subcircuit, a first end of the second capacitor is connected to a second end of the ninth switch, a second end of the second capacitor is connected to a first end of the eleventh switch, and a second end of the eleventh switch is grounded, wherein i is an integer greater than 1 and less than N; The Nth subcircuit of the N subcircuits comprises a twelfth switch, a first end of the twelfth switch is connected to the power supply, and a second end of the twelfth switch is connected to the second end of the capacitor in the N-1th subcircuit; The level conversion unit is used to control the on-off of the switches in the N sub-circuits according to the first drive signal, so that the on-off states of the seventh switch, the eighth switch, the ninth switch and the eleventh switch are the same, and the on-off states of the tenth switch and the twelfth switch are the same, and the on-off states of the seventh switch and the twelfth switch are opposite, and the low level of the third drive signal is generated at the first output pin when the seventh switch is closed, and the high level of the third drive signal is generated at the first output pin when the twelfth switch is closed, and the output voltage of the power supply is equal to the power supply voltage of the touch chip. Or the level conversion unit includes: a thirteenth switch, a fourteenth switch, a fifteenth switch, a third capacitor and a DC voltage conversion unit; A first end of the thirteenth switch is connected to a power source, a second end of the thirteenth switch is connected to the second output pin, a first end of the third capacitor is connected to the second output pin, a second end of the third capacitor is connected to a first end of the fourteenth switch and the first output pin respectively, and a second end of the fourteenth switch is grounded; The input end of the DC voltage conversion unit is connected to a power supply, the output end of the DC voltage conversion unit is connected to a first end of a fifteenth switch, and the second end of the fifteenth switch is connected to a second end of the third capacitor; The DC voltage conversion unit is used to step up or down the output voltage of the power supply; The level conversion unit is used to control the on and off of the thirteenth switch, the fourteenth switch and the fifteenth switch according to the first drive signal, so that the on and off states of the thirteenth switch and the fourteenth switch are the same, and the on and off states of the thirteenth switch and the fifteenth switch are opposite, when the thirteenth switch is closed, the low level of the third drive signal is generated at the first output pin, when the fifteenth switch is closed, the high level of the third drive signal is generated at the first output pin, and the output voltage of the power supply is equal to the power supply voltage of the touch chip.

16. The touch control device according to any one of claims 1 to 12 or 15, characterized in that: The touch control device also includes a grounding loop; The grounding loop is located in the touch screen, and the induction loop, the grounding loop and the electrode are located in the same layer in the touch screen, the grounding loop is located between the induction loop and the electrode, and the grounding loop is grounded.

17. The touch control device according to claim 1, characterized in that: The touch control chip includes a current conversion unit and a processing unit; The current conversion unit is used to generate an identification signal according to the sensing signal; The processing unit is used to identify the touch position according to the identification signal.

18. The touch control device according to claim 17, characterized in that: The current conversion unit includes a transimpedance amplifier, a first resistor, a second resistor, a first feedback resistor, a second feedback resistor, a fourth capacitor, a fifth 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 transimpedance 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 transimpedance amplifier, the negative output end of the transimpedance amplifier is connected to the first input end of the analog-to-digital converter, and the positive output end of the transimpedance 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 terminal of the transimpedance amplifier, the second end of the first feedback resistor is connected to the negative output terminal of the transimpedance amplifier, the first end of the second feedback resistor is connected to the negative input terminal of the transimpedance amplifier, and the second end of the first feedback resistor is connected to the positive output terminal of the transimpedance amplifier; The first end of the fourth capacitor is connected to the first end of the first feedback resistor, the second end of the fourth capacitor is connected to the second end of the first feedback resistor, the first end of the fifth capacitor is connected to the first end of the second feedback resistor, and the second end of the fifth capacitor is connected to the second end of the second feedback resistor; The transimpedance amplifier is used to convert the sensing signal into an identification voltage; The analog-to-digital converter is used to receive the identification voltage and convert the identification voltage into the identification signal.

19. The touch control device according to claim 18, characterized in that: The current conversion unit further includes: a low-pass filter; The first input end of the low-pass filter is connected to the negative output end of the transimpedance amplifier, the second input end of the low-pass filter is connected to the positive output end of the transimpedance 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 used to perform low-pass filtering on the identification voltage to reduce external signal interference in the identification voltage.

20. The touch control device according to claim 19, characterized in that: The current conversion unit also includes: a sampling and holding module; the sampling and holding module includes a sixteenth switch, a seventeenth switch, an eighteenth switch, a nineteenth switch, a sixth capacitor and a seventh capacitor; the first end of the sixteenth switch is connected to the first output end of the low-pass filter, the second end of the sixteenth switch is connected to the first end of the sixth capacitor and the first end of the seventeenth switch at the same time, the second end of the seventeenth switch is connected to the first input end of the analog-to-digital converter, and the second end of the sixth capacitor is grounded; the first end of the eighteenth switch is connected to the second output end of the low-pass filter, the second end of the eighteenth switch is connected to the first end of the seventh capacitor and the first end of the nineteenth switch at the same time, the second end of the nineteenth switch is connected to the second input end of the analog-to-digital converter, and the second end of the seventh capacitor is grounded; the sampling and holding module is used to hold the identification voltage.

21. The touch control device according to claim 20, characterized in that: The current conversion unit also includes: a buffer amplifier; a first input terminal of the buffer amplifier is connected to the second terminal of the seventeenth switch, a second input terminal of the buffer amplifier is connected to the second terminal of the nineteenth switch, a first output terminal of the buffer amplifier is connected to the first input terminal of the analog-to-digital converter, and a second output terminal of the buffer amplifier is connected to the second input terminal of the analog-to-digital converter; the buffer amplifier is used to perform signal amplification processing on the identification voltage.

22. A touch chip, characterized in that: The touch chip is used to output a first drive signal and respond to a first excitation signal according to an induction loop. When a finger touches the touch screen, the induction loop, the finger and the electrodes on the touch screen form a closed loop, and the touch position is identified by the induction signal generated in the closed loop, wherein the first excitation signal is obtained according to the first drive signal, the induction loop is located in the touch screen, and the electrodes include multiple horizontal electrodes and / or multiple vertical electrodes.

23. A display screen module, characterized in that: comprising an electrode and a touch control device as claimed in any one of claims 1 to 21; When a finger touches the screen, the electrode, the sensing circuit and the finger form a closed circuit, wherein the electrode includes horizontal electrodes and / or vertical electrodes arranged on the touch screen.

24. An electronic device, characterized in that: A display screen module comprising a processor and claim 23; The processor is electrically connected to the display screen module; The processor is used to send a switching signal to the touch control device, so that the touch control chip in the touch control device outputs a first driving signal or outputs a second driving signal to the electrode.

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