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 transmitting a driving signal to an electrode; the electrodes comprise a plurality of transverse electrodes and a plurality of longitudinal electrodes; the touch control chip comprises at least two electrodes, a switch tube and at least two electrodes are connected through the switch tube, the at least two electrodes are connected to form at least one induction loop after the switch tube is closed, the induction loop is used for mutual inductance with an external moving coil, and the touch control chip carries out touch control position identification according to signals after mutual inductance, the at least two electrodes include at least one of the lateral electrode and the longitudinal electrode. According to the touch control device provided by the embodiment of the invention, the touch control position of the moving coil on the touch control screen can be identified underwater through the touch control chip, so that the touch control device can be suitable for touch control identification in various use scenes, 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 adopts a capacitive solution to identify touch control instructions.

[0004] However, since the capacitive solution is more sensitive to water when recognizing touch commands, when the display screen is covered with water, it is unable to recognize the touch commands of the finger, resulting in that the 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 send a driving signal to an electrode; the electrode, the electrode comprising a plurality of transverse electrodes and a plurality of longitudinal electrodes; a switch tube, at least two electrodes being connected through the switch tube, the switch tube connecting the at least two electrodes to form at least one induction loop when closed, the induction loop being used to perform mutual induction with an external dynamic coil, the touch control chip performing touch position identification according to the signal after the mutual induction, wherein the at least two electrodes comprise at least one of the transverse electrode and the longitudinal electrode.

[0007] In a possible implementation, after the switch tube is disconnected, the electrodes are in a disconnected state, the touch chip sends a driving signal to one of the multiple horizontal electrodes and the multiple vertical electrodes, and performs position identification according to the sensing signal output by the other one of the multiple horizontal electrodes and the multiple vertical electrodes.

[0008] In a possible implementation, at least two of the electrodes are one of the transverse electrodes and the longitudinal electrodes, and at least two of the electrodes include a first electrode and a second electrode that are adjacently arranged, and when the switch tube is closed, the first electrode and the second electrode are connected to form the induction loop.

[0009] In a possible implementation, the at least two electrodes are connected through the switch tube, including: one end of the first electrode is connected to the touch control chip, and the other end of the first electrode is connected to one end of the switch tube; one end of the second electrode is connected to the touch control chip, and the other end of the second electrode is connected to the other end of the switch tube.

[0010] In a possible implementation, at least two of the electrodes are one of the transverse electrodes and the longitudinal electrodes, at least two of the electrodes include at least three electrodes arranged adjacent to each other, and the switch tube includes at least two switch tubes, which, when closed, connect the at least three electrodes to form the induction loop.

[0011] In a possible implementation, when the induction loop includes i electrodes, the first end of the Kth electrode among the i electrodes and the first end of the Lth electrode among the i electrodes are connected through a switch tube, and the second end of the K+1th electrode among the i electrodes and the second end of the Lth electrode among the i electrodes are connected through a switch tube, wherein K+L=i+1, and when i is an odd number, the second end of the Kth electrode among the i electrodes is connected to the touch control chip, and the The first end of the Kth electrode among the i electrodes is connected to the touch control chip. When i is an even number, the second end of the Kth electrode among the i electrodes is connected to the touch control chip. The second end of each electrode is connected to the touch control chip, and i is a positive integer greater than or equal to 3.

[0012] In a possible implementation, the induction loop includes an induction loop formed by one of the transverse electrode and the longitudinal electrode; the touch chip is used to send a driving signal to the induction loop, the induction loop and the dynamic coil perform mutual induction, and the touch chip identifies the touch position according to the change of the signal in the induction loop after the mutual induction.

[0013] In a possible implementation, the at least one induction loop includes a first induction loop and a second induction loop; the first induction loop includes an induction loop formed by one of the transverse electrode and the longitudinal electrode, and the second induction loop includes an induction loop formed by the other of the transverse electrode and the longitudinal electrode; the touch chip is used to send a drive signal to the first induction loop, and the first induction loop and the moving coil are mutually inductively connected to generate an induced current on the moving coil; the second induction loop is used to mutually inductively connect to the first induction loop and / or the moving coil, and the touch chip identifies the touch position according to the signal after the mutual induction of the second induction loop.

[0014] In a possible implementation, the touch chip is used to continuously send a driving signal to the first induction loop; the moving coil is used to generate mutual induction with the first induction loop to change the current in the first induction loop; the second induction loop is used to generate mutual induction with the first induction loop and the moving coil, and the touch chip identifies the touch position according to the signal after the mutual induction of the second induction loop.

[0015] In a possible implementation, the touch chip is used to intermittently send a driving signal to the first induction loop; the moving coil is used to generate mutual induction with the first induction loop when the touch chip sends a driving signal to the first induction loop, so as to generate an induced current in the moving coil; the second induction loop is used to generate mutual induction with the moving coil when the touch chip does not send a driving signal to the first induction loop, and the touch chip identifies the touch position according to the signal after the mutual induction of the second induction loop.

[0016] In a possible implementation, the touch chip includes a current conversion unit and a processing unit; the current conversion unit is used to generate a touch signal according to a signal after mutual inductance between the induction loop and the dynamic coil; the processing unit is used to identify a touch position according to the touch signal.

[0017] In a possible implementation, the current conversion unit includes a transimpedance amplifier, a first resistor, a second resistor, a first feedback resistor, a second feedback resistor, a first capacitor, a second capacitor and an analog-to-digital converter; the first end of the first resistor is connected to the output end of the induction loop, 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 end of the transimpedance amplifier, and the first feedback resistor is connected to the positive input end of the transimpedance amplifier. The second end of the resistor is connected to the negative output end of the transimpedance amplifier, the first end of the second feedback resistor is connected to the negative input end of the transimpedance amplifier, and the second end of the first feedback resistor is connected to the positive output end of the transimpedance amplifier; the first end of the first capacitor is connected to the first end of the first feedback resistor, the second end of the first capacitor is connected to the second end of the first feedback resistor, the first end of the second capacitor is connected to the first end of the second feedback resistor, and the second end of the second capacitor is connected to the second end of the second feedback resistor; the transimpedance amplifier is used to convert the signal after the mutual inductance of the induction loop and the moving coil into an identification voltage; the analog-to-digital converter is used to receive the identification voltage and convert the identification voltage into the touch signal.

[0018] In one possible implementation, the current conversion unit also includes: a low-pass filter; a first input end of the low-pass filter is connected to the negative output end of the transimpedance amplifier, a second input end of the low-pass filter is connected to the positive output end of the transimpedance amplifier, a first output end of the low-pass filter is connected to the first input end of the analog-to-digital converter, and a 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.

[0019] In a possible implementation, the current conversion unit also includes: a sampling and holding module; the sampling and holding module includes a first switch, a second switch, a third switch, a fourth switch, a third capacitor and a fourth capacitor; the first end of the first switch is connected to the first output end of the low-pass filter, the second end of the first switch is simultaneously connected to the first end of the third capacitor and the first end of the second switch, the second end of the second switch is connected to the first input end of the analog-to-digital converter, and the second end of the third capacitor is grounded; the first end of the third switch is connected to the second output end of the low-pass filter, the second end of the third switch is simultaneously connected to the first end of the fourth capacitor and the first end of the fourth switch, the second end of the fourth switch is connected to the second input end of the analog-to-digital converter, and the second end of the fourth capacitor is grounded; the sampling and holding module is used to maintain the identification voltage.

[0020] In a possible implementation, the current conversion unit further includes: a buffer amplifier; a first input terminal of the buffer amplifier is connected to the second terminal of the second switch, a second input terminal of the buffer amplifier is connected to the second terminal of the fourth 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.

[0021] According to a second aspect of an embodiment of the present application, a touch chip is provided, wherein the touch chip is connected to electrodes, and the touch chip is used to send a driving signal to the electrodes; the electrodes include multiple horizontal electrodes and multiple vertical electrodes; at least two electrodes are connected via the switch tube, and when the switch tube is closed, the at least two electrodes are connected to form at least one induction loop, and the induction loop is used to perform mutual induction with an external dynamic coil, and the touch chip performs touch position identification according to the signal after the mutual induction, wherein the at least two electrodes include at least one of the horizontal electrode and the vertical electrode.

[0022] According to a third aspect of the embodiments of the present application, a display screen module is provided, characterized by comprising the touch control device as described in the first aspect of the embodiments of the present application.

[0023] According to the 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 control signal to the touch device to close the switch tube in the touch device.

[0024] According to the touch device provided in the embodiment of the present application, the touch device includes a touch chip, electrodes and a switch tube. When the switch tube is closed, multiple electrodes are connected to form at least one induction loop, so that the induction loop can be mutually inductive with an external dynamic coil, and the touch chip can identify the touch position based on the signal after mutual induction. The touch device in the embodiment of the present application uses the mutual inductance between the coils for touch recognition. Since the underwater environment has little effect on the mutual inductance of the coils, compared with the capacitive touch recognition solution in the prior art, the touch device can be suitable for touch recognition in an underwater environment, and the touch screen can be touched through the dynamic coil underwater. Therefore, the touch device can be suitable for touch recognition in a variety of usage scenarios and has high applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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.

[0026] Figure 1 is a schematic diagram of a touch control device provided in an embodiment of the present application;

[0027] Figure 2 is a schematic diagram of a display screen provided in an embodiment of the present application;

[0028] Figure 3 is a schematic diagram of an induction loop provided in an embodiment of the present application;

[0029] Figure 4 is a schematic diagram of another induction loop provided in an embodiment of the present application;

[0030] Figure 5 is a schematic diagram of another induction loop provided in an embodiment of the present application;

[0031] Figure 6 This is a schematic diagram of a current change caused by mutual inductance between a moving coil and an induction loop provided in an embodiment of the present application;

[0032] Figure 7 It is a schematic diagram of the influence of the relative position between a moving coil and an induction loop on the current provided by an embodiment of the present application;

[0033] Figure 8 is a schematic diagram of mutual inductance between a moving coil and an induction loop provided in an embodiment of the present application;

[0034] Fig. 9 is a schematic diagram of another induction loop provided in an embodiment of the present application;

[0035] Fig.10 is a schematic diagram of another induction loop provided in an embodiment of the present application;

[0036] Fig.11 This is another schematic diagram of current change caused by mutual inductance between a moving coil and an induction loop provided in an embodiment of the present application;

[0037] Fig.12 This is another schematic diagram of current change caused by mutual inductance between a moving coil and an induction loop provided in an embodiment of the present application;

[0038] Fig.13 is a schematic diagram of another mutual inductance between a moving coil and an induction loop provided in an embodiment of the present application;

[0039] Fig.14 is a schematic diagram of a touch control chip provided in an embodiment of the present application;

[0040] Fig.15 is a circuit diagram of a current conversion unit provided in an embodiment of the present application;

[0041] Fig.16 is a circuit diagram of another current conversion unit provided in an embodiment of the present application;

[0042] Fig.17 is a circuit diagram of another current conversion unit provided in an embodiment of the present application;

[0043] Fig.18 is a circuit diagram of another current conversion unit provided in an embodiment of the present application;

[0044] Fig.19 is a schematic diagram of a display screen module provided in an embodiment of the present application;

[0045] Fig. 20 is a schematic diagram of an electronic device provided in an embodiment of the present application;

[0046] Fig.21 is a schematic diagram of a touch device provided in an embodiment of the present application;

[0047] Fig. 22 is a schematic diagram of a moving coil provided in an embodiment of the present application;

[0048] Fig.23 is an equivalent circuit diagram of a mutual inductance provided in an embodiment of the present application;

[0049] Fig.24 It is a schematic diagram of the relationship between resonant frequency and gain provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] 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.

[0051] 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 adopts capacitive recognition of touch commands. For example: the touch command is determined by the change in the capacitance of multiple horizontal electrodes and multiple longitudinal electrodes arranged, but because the capacitance is more sensitive to water when recognizing the touch command, 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.

[0052] In an embodiment of the present application, the touch device includes a touch chip, an electrode and a switch tube. When the switch tube is closed, multiple electrodes are connected to form at least one induction loop, so that the induction loop can be mutually inductive with an external moving coil, and the touch chip can identify the touch position based on the signal after mutual induction. The touch device in the embodiment of the present application uses the mutual inductance between coils for touch recognition. Since the underwater environment has little effect on the mutual inductance of coils, compared with the capacitive touch recognition scheme in the prior art, the touch device can be suitable for touch recognition in underwater environments. The touch chip can be used to identify the touch position of the moving coil on the touch screen underwater. Therefore, the touch device can be suitable for touch recognition in a variety of usage scenarios and has high applicability.

[0053] The touch control device provided by the present application is described below through embodiments.

[0054] Figure 1 is a schematic diagram of a touch device provided in an embodiment of the present application, such as Figure 1As shown, the touch control device includes a touch control chip 103, an electrode 101 and a switch tube 102. The touch control chip 103 is used to send a driving signal to the electrode 101. The electrode 101 includes multiple horizontal electrodes and multiple vertical electrodes. At least two electrodes 101 are connected through the switch tube 102. After the switch tube 102 is closed, the at least two electrodes 101 are connected to form at least one induction loop. The induction loop is used to perform mutual induction with an external dynamic coil. The touch control chip 103 performs touch position recognition according to the signal after mutual induction, wherein the at least two electrodes 101 include at least one of a horizontal electrode and a vertical electrode, for example, the at least two electrodes include at least two horizontal electrodes and / or at least two vertical electrodes.

[0055] The touch control device also includes a touch control chip 103, which can output a driving signal to the electrode 101. In one example, the touch control chip 103 can output a square wave driving signal or a sine wave driving signal to the electrode 101. The electrode 101 can perform touch recognition under the drive of the driving signal. The electrode 101 includes multiple transverse electrodes and multiple longitudinal electrodes. Multiple transverse electrodes or multiple longitudinal electrodes in the multiple electrodes 101 are connected to each other through switch tubes 102. For example, two adjacent transverse electrodes are connected through one switch tube 102, and non-adjacent transverse electrodes are connected through multiple switch tubes 102. It should be understood that the transverse electrodes and the longitudinal electrodes are not connected through the switch tube 102, that is, the transverse electrodes are connected to each other through the switch tube 102, and the longitudinal electrodes are connected to each other through the switch tube 102.

[0056] The switch tube 102 may be a plurality of switch tubes 102. When at least some of the switch tubes 102 are closed, at least some of the electrodes 101 form at least one induction loop. The induction loop may be mutually inductive with an external dynamic coil to generate a mutually inductive signal. The touch chip 103 may identify the touch position according to the mutually inductive signal. The mutually inductive signal may be a current signal, a voltage signal, etc.

[0057] In one example, the switch tube 102 may be a thin film field effect transistor (TFT). Specifically, Figure 2 is a schematic diagram of a display screen provided in an embodiment of the present application, such as Figure 2As shown, the display screen is stacked from top to bottom with a flexible cover plate 201, a polarizer 202, a TP layer 203, an organic encapsulation layer 204, a metal cathode 205, an OLED organic layer 206, an Array TFT layer 207, and a PI substrate 208, and the TP+Display FPC 209 is connected to the OLED organic layer 206 and the Array TFT layer 207. The switch tube 102 can be the TFT layer 207 in the display screen. The TFT layer 207 includes a plurality of TFTs, that is, a plurality of switch tubes 102. At least part of the plurality of TFTs is used to drive the display screen to display. There are redundant TFTs in the TFT layer 207. A plurality of electrodes 101 can be arranged on the TFT layer 207, thereby realizing the connection of the horizontal electrodes or the vertical electrodes in pairs through the plurality of switch tubes 102 in the TFT layer 207. Optionally, a plurality of horizontally arranged metal strips and a plurality of vertically arranged metal strips can be deposited on the TFT layer 207 as a plurality of horizontal electrodes and a plurality of vertical electrodes.

[0058] In another example, the switch tube 102 may be a plurality of switch tubes provided in the touch control chip 103 , both ends of the electrode 101 are connected to the touch control chip 103 , and after the switch tube 102 is closed, the plurality of electrodes 101 form an induction loop.

[0059] The two ends of the electrode may be connected to the touch chip directly or indirectly. For example, the electrodes are indirectly connected via a switch or other device.

[0060] Optionally, the touch chip 103 can send a control signal to the switch tube 102 according to the switching signal sent by the processor of the external device. After the switch tube 102 receives the control signal, at least part of the switch tube 102 is closed, so that multiple horizontal electrodes and / or multiple vertical electrodes form an induction loop. For example: the switch tube 102 between adjacent horizontal electrodes is closed, so that the adjacent horizontal electrodes form an induction loop similar to a coil.

[0061] In the embodiment of the present application, the touch control device includes a touch control chip 103, an electrode 101 and a switch tube 102. When the switch tube 102 is closed, the multiple electrodes 101 are connected to form at least one induction loop, thereby enabling the touch chip 103 to identify the touch position based on the signal after mutual induction through the mutual induction between the induction loop and the external moving coil. The touch control device in the embodiment of the present application uses the mutual induction between the coils for touch recognition. Since the underwater environment has little effect on the mutual inductance of the coils, compared with the capacitive touch recognition scheme in the prior art, the touch control device can be suitable for touch recognition in an underwater environment, and can identify the touch position of the underwater moving coil on the touch screen through the touch chip. Therefore, the touch control device can be suitable for touch recognition in a variety of usage scenarios and has high applicability.

[0062] In a possible implementation, after the switch tube 102 is disconnected, the electrodes 101 are in a disconnected state, the touch chip 103 sends a driving signal to one of the multiple horizontal electrodes and the multiple vertical electrodes, and performs position recognition based on the sensing signal output by the other one of the multiple horizontal electrodes and the multiple vertical electrodes.

[0063] When the switch tube 102 is disconnected, the electrodes 101 are not connected, one of the multiple horizontal electrodes or the multiple vertical electrodes is used as a driving electrode, and the touch chip 103 outputs a driving signal to the driving electrode. The other of the multiple horizontal electrodes or the multiple vertical electrodes is used as a receiving electrode to output a sensing signal. The touch chip 103 performs touch recognition based on the sensing signal and can identify the touch position of the finger. This method is a mutual capacitance detection method. In addition, in another embodiment, a self-capacitance detection method can be superimposed to identify the touch position of the finger. At least one of the multiple horizontal electrodes and the multiple vertical electrodes is used as both a driving electrode and a receiving electrode. The touch chip 103 sends a driving signal to the driving electrode and performs position recognition based on the sensing signal output by the receiving electrode. For example, the touch control chip 103 outputs driving signals to multiple horizontal electrodes (driving electrodes) and simultaneously receives sensing signals output by the multiple horizontal electrodes (receiving electrodes), or the touch control chip 103 outputs driving signals to multiple vertical electrodes (driving electrodes) and simultaneously receives sensing signals output by the multiple vertical electrodes (receiving electrodes), or the touch control chip 103 simultaneously outputs driving signals to multiple horizontal electrodes and multiple vertical electrodes and simultaneously receives sensing signals output by multiple horizontal electrodes and multiple vertical electrodes, and the touch control chip 103 performs touch recognition based on the received sensing signals.

[0064] Optionally, the touch chip 103 may send a control signal to the switch tube 102 according to a switching signal sent by a processor of an external device. After receiving the control signal, the switch tube 102 is disconnected or remains disconnected, so that the multiple electrodes 101 are not connected.

[0065] In the embodiment of the present application, when the switch tube 102 is disconnected, the electrodes 101 are in a disconnected state, and the touch chip identifies the touch position according to the sensing signals output by the multiple electrodes 101, thereby being suitable for touch position identification in daily use scenarios. Since the switch tube 102 can be switched between closed and disconnected states, it can be suitable for touch position identification in daily scenes and underwater scenes. Therefore, the touch device can be suitable for touch position identification in a variety of usage scenarios and has high applicability.

[0066] In a possible implementation, at least two electrodes 101 are one of horizontal electrodes and vertical electrodes, and at least two electrodes 101 include a first electrode and a second electrode disposed adjacent to each other. When the switch tube 102 is closed, the first electrode and the second electrode are connected to form an induction loop.

[0067] At least two electrodes 101 are transverse electrodes or longitudinal electrodes, and the transverse electrodes or longitudinal electrodes include adjacently arranged first electrodes 101 and second electrodes 101. For example, if there are 16 transverse electrodes 101, there are 8 first electrodes and 8 second electrodes in the transverse electrodes, and the first electrodes and the second electrodes are arranged crosswise.

[0068] When the switch tube 102 is closed, a first electrode and a second electrode form an induction loop. It should be noted that only part of the switch tube 102 can be closed so that part of the first electrode and part of the second electrode form at least one induction loop, which can be set specifically as needed.

[0069] In the embodiment of the present application, when the switch tube 102 is closed, adjacent horizontal electrodes or adjacent longitudinal electrodes are connected to form multiple induction loops. Since the induction loop can be equivalent to a single-turn coil, it can be mutually inductive with the moving coil. The touch position can be identified through the signal after mutual induction. Since the induction loop only includes two electrodes 101, the number of induction loops is large, which can improve the accuracy of touch position identification.

[0070] Figure 3 is a schematic diagram of an induction loop provided in an embodiment of the present application, such as Figure 3 As shown, when at least two electrodes 101 are connected through the switch tube 102 to form at least one induction loop 104, one end of the first electrode 1011 is connected to the touch chip 103, the other end of the first electrode 1011 is connected to one end of the switch tube 102, one end of the second electrode 1012 is connected to the touch chip 103, and the other end of the second electrode 1012 is connected to the other end of the switch tube 102.

[0071] One of the first electrode 1011 and the second electrode 1012 can receive a driving signal sent by the touch chip 103 , and the other of the first electrode 1011 and the second electrode 1012 can be grounded through the touch chip 103 , thereby forming a closed loop.

[0072] It should be understood that Figure 3 This is just an example. Specifically, the induction loop 104 may also be composed of longitudinal electrodes, which will not be described in detail here.

[0073] In the embodiment of the present application, when the switch tube 102 is closed, adjacent horizontal electrodes or adjacent longitudinal electrodes are connected to form a plurality of induction loops 104. Since the induction loop 104 can be equivalent to a single-turn coil, it can be mutually inductive with the moving coil, and the touch position can be identified through the signal after mutual induction. Moreover, since the induction loop 104 only includes two electrodes 101, the number of induction loops is large, which can improve the accuracy of touch position identification.

[0074] In a possible implementation, at least two electrodes 101 are one of horizontal electrodes and vertical electrodes, the at least two electrodes 101 include at least three electrodes 101 arranged adjacent to each other, the switch tube 102 includes at least two switch tubes 102, and when the at least two switch tubes 102 are closed, the at least three electrodes 101 are connected to form an induction loop.

[0075] When the multiple switch tubes 102 are closed, at least three adjacent electrodes 101 form a circuitous induction loop. The at least three adjacent electrodes 101 can be horizontal electrodes or vertical electrodes. For example, there are 16 horizontal electrodes in total, and 4 adjacent horizontal electrodes form an induction loop, so 4 circuitous induction loops are formed in total.

[0076] It should be understood that one of the at least three electrodes 101 receives a driving signal sent by the touch chip 103, and another of the at least three electrodes 101 is grounded through the touch chip 103, thereby forming a circuitous closed loop. The circuitous shape can be a paper clip-shaped circuitous shape, or other circuitous shapes, which are not limited here.

[0077] In the embodiment of the present application, when the switch tube 102 is closed, at least three adjacent horizontal electrodes or at least three adjacent longitudinal electrodes are connected to form a plurality of circuitous induction loops. Since the induction loop can be equivalent to a multi-turn coil, it can be mutually inductive with the moving coil, and the touch position can be identified through the signal after mutual induction. Moreover, since the induction loop includes a plurality of electrodes 101 and is in the shape of a circuitous multi-turn coil, compared with the above embodiment which only includes two driving electrodes 101, the generated magnetic field intensity is higher, and the mutual inductance with the moving coil has a greater influence on the signal, so the sensitivity to touch recognition is higher.

[0078] In a possible implementation, when the sensing loop includes i electrodes 101, the first end of the Kth electrode 101 among the i electrodes 101 and the first end of the Lth electrode 101 among the i electrodes 101 are connected through the switch tube 102, and the second end of the K+1th electrode 101 among the i electrodes 101 and the second end of the Lth electrode 101 among the i electrodes 101 are connected through the switch tube 102, wherein K+L=i+1, and when i is an odd number, the second end of the Kth electrode 101 among the i electrodes 101 is connected to the touch control chip 103, and the Kth electrode 101 among the i electrodes 101 is connected to the touch control chip 103. The first end of each electrode 101 is connected to the touch chip 103. When i is an even number, the second end of the Kth electrode 101 among the i electrodes 101 is connected to the touch chip 103. The second end of each electrode 101 is connected to the touch chip 103 , and i is a positive integer greater than or equal to 3.

[0079] The following description will be made by taking three electrodes 101 forming an induction loop 104 and four electrodes 101 forming an induction loop 104 as examples. Figure 4 is a schematic diagram of another induction loop provided in an embodiment of the present application, such as Figure 4 As shown, the induction loop 104 includes three electrodes 101, the first end of the first electrode 101 and the first end of the third electrode 101 are connected through a closed switch tube 102, and the second end of the second driving electrode 101 and the second end of the third driving electrode 101 are connected through a closed switch tube 102. Because i=3, the second end of the first electrode 101 is connected to the touch chip 103, and the first end of the second electrode 101 is connected to the touch chip 103. That is, when i=3, K+L=4, It should be understood that the electrode 101 cannot be connected to itself, so K is not equal to L. The first electrode 101 or the second electrode 101 can receive a driving signal sent by the touch chip 103, and the other of the first electrode 101 or the second electrode 101 can be grounded through the touch chip 103, thereby forming a circuitous closed induction loop 104.

[0080] Figure 5 is a schematic diagram of another induction loop provided in an embodiment of the present application, such as Figure 5As shown, the induction loop 104 includes four electrodes 101, the first end of the first electrode 101 and the first end of the fourth electrode 101 are connected through a closed switch tube 102, the second end of the fourth electrode 101 and the second end of the second electrode 101 are connected through a closed switch tube 102, the first end of the second electrode 101 and the first end of the third electrode 101 are connected through a closed switch tube 102, the second end of the first electrode 101 is connected to the touch chip 103, and the second end of the third driving electrode 101 is connected to the touch chip 103, that is, when i=4, K+L=5, It should be understood that the electrode 101 cannot be connected to itself, so K is not equal to L. The first electrode 101 or the third electrode 101 can receive the driving signal sent by the touch chip 103, and the other of the first electrode 101 or the third electrode 101 can be grounded through the touch chip 103, thereby forming a circuitous closed induction loop 104.

[0081] It should be understood that Figure 4 and Figure 5 As just an example, specifically, the induction loop 104 may be composed of at least three electrodes 101 , for example, five electrodes 101 or six electrodes 101 , and the induction loop 104 may also be composed of longitudinal electrodes, which will not be described in detail herein.

[0082] In the embodiment of the present application, when the switch tube 102 is closed, at least three adjacent horizontal electrodes or at least three adjacent longitudinal electrodes are connected to form a plurality of circuitous induction loops 104. Since the induction loop 104 can be equivalent to a multi-turn coil, it can be mutually inductive with the moving coil, and the touch position can be identified through the signal after mutual induction. Moreover, since the induction loop 104 includes a plurality of electrodes 101 and is in the shape of a circuitous multi-turn coil, compared with the above embodiment which only includes two driving electrodes 101, the generated magnetic field intensity is higher, and the mutual inductance with the moving coil has a greater influence on the current, so the sensitivity to touch recognition is higher.

[0083] In a possible implementation, the induction loop includes an induction loop formed by one of a horizontal electrode and a vertical electrode. The touch chip 103 is used to send a driving signal to the induction loop. The induction loop and the moving coil perform mutual induction. The touch chip 103 identifies the touch position according to the change of the signal in the induction loop after the mutual induction.

[0084] like Figure 4 and Figure 5In the example shown, the induction loop is formed by one of the horizontal electrodes or the vertical electrodes. The induction loop can receive a driving signal sent by the touch chip 103. In one example, the driving signal is a driving voltage. The induction loop generates a driving current driven by the driving voltage. When the moving coil is close to the induction loop, since the driving current is included in the induction loop and the induction loop is a closed loop, there is a magnetic field in the induction loop, and mutual induction occurs between the induction loop and the moving coil. The touch chip 103 identifies the touch position according to the change of the signal in the induction loop after the mutual induction.

[0085] In one example, when the induction loop and the moving coil are mutually inductive, a mutual inductance current is generated in the moving coil to change the load of the induction loop. Since the driving signal does not change, the driving current generated in the induction loop changes, and the touch chip 103 identifies the touch position according to the change of the driving current in the induction loop.

[0086] Figure 6 is a schematic diagram of a current change caused by mutual inductance between a moving coil and an induction loop provided in an embodiment of the present application, such as Figure 6 As shown, when the moving coil is not close to the induction loop, the induction loop generates a driving current driven by the driving signal. When the moving coil and the induction loop are mutually inductive, an induced current is generated in the moving coil, and the driving current generated in the induction loop increases. The touch chip 103 identifies the touch position according to the change of the driving current in the induction loop.

[0087] Figure 7 is a schematic diagram of the influence of the relative position between a moving coil and an induction loop on the current provided in an embodiment of the present application, Figure 7 The ordinate in a represents the current magnitude, and the abscissa represents the distance between the moving coil and the induction loop in the X or Y direction, such as Figure 7 As shown in a, in the X direction or Y direction, when the moving coil is Figure 7 The closer point n in a is, the smaller the load of the induction loop is, so the driving current in the induction loop is larger, and point n is located at the center of the induction loop. Figure 7 In b, the ordinate represents the current magnitude, and the abscissa represents the distance between the moving coil and the induction loop in the Z direction. Figure 7 As shown in FIG. 2 , the closer the moving coil is to the induction loop in the Z-axis direction, the smaller the load of the induction loop is, and the larger the driving current in the induction loop is. For example, when the moving coil slides on the touch device, when the moving coil and the induction loop just overlap, the mutual inductance is maximum, and the driving current is maximum. When sliding toward both sides at the corresponding middle position, the mutual inductance gradually decreases, and the touch chip 103 recognizes the touch position according to the change in the driving current in the induction loop.

[0088] Figure 8 is a schematic diagram of another mutual inductance between a moving coil and an induction loop provided in an embodiment of the present application, such as Figure 8 As shown, for Figure 6 In the example shown, the induction loop 104 receives a driving signal and generates a driving current. The dynamic coil 200 and the induction loop 104 generate a mutual induction current, which changes the load of the induction loop 104 and thus changes the current in the induction loop 104 .

[0089] It should be understood that in the embodiment of the present application, since the sensing loop only includes horizontal electrodes or vertical electrodes, the touch chip can only identify the horizontal coordinate or vertical coordinate of the touch position when identifying the touch position, and cannot accurately identify the touch position, so it is only suitable for scenes with low touch accuracy requirements. In another example, one of the horizontal electrodes or the vertical electrodes can be formed into a sensing loop first, and after the touch detection is completed, the sensing loop can be disconnected, and then the other of the horizontal electrodes or the vertical electrodes can be formed into a sensing loop, thereby realizing the identification of the horizontal coordinate and vertical coordinate of the touch position.

[0090] In the embodiment of the present application, the switch tube 102 between the multiple electrodes 101 in the horizontal electrode or the vertical electrode is closed to form an induction loop, and the induction loop and the moving coil are mutually inductive, so that the touch position can be identified. Since only the horizontal electrode or the vertical electrode is needed to form the induction loop, there is no need to use all the electrodes 101, so the power consumption of touch recognition is low. Since the touch position is identified by mutual inductance between coils, it can be suitable for underwater touch scenarios with low touch accuracy requirements.

[0091] In a possible implementation, at least one induction loop includes a first induction loop and a second induction loop, the first induction loop includes an induction loop formed by one of a horizontal electrode and a vertical electrode, the second induction loop includes an induction loop formed by the other of the horizontal electrode and the vertical electrode, the touch chip 103 is used to send a driving signal to the first induction loop, the first induction loop and the moving coil are mutually inductively connected to generate an induced current on the moving coil, the second induction loop is used to mutually inductively connect with the first induction loop and / or the moving coil, and the touch chip 103 identifies the touch position according to the signal after the mutual induction of the second induction loop.

[0092] When the switch tube 102 is closed, the first induction loop is composed of one of the horizontal electrodes or the vertical electrodes, and the second induction loop is composed of the other of the horizontal electrodes or the vertical electrodes. That is, when the first induction loop is composed of the horizontal electrodes, when the switch tube 102 is closed, multiple horizontal electrodes form at least one first induction loop, and multiple vertical electrodes form at least one second induction loop; when multiple vertical electrodes form at least one first induction loop, multiple horizontal electrodes form at least one second induction loop.

[0093] The first induction loop can receive the driving signal sent by the touch chip 103, and generate a driving current according to the driving signal. Since the induction loop includes the driving current and the induction loop is a closed loop, there is a magnetic field in the induction loop, and mutual induction occurs between the induction loop and the moving coil, generating an induced current in the moving coil.

[0094] Since an induced current is generated in the moving coil and the moving coil is a closed coil, the moving coil generates a magnetic field. At this time, there is a magnetic field in the first induction loop and there is a magnetic field in the moving coil. Therefore, the second induction loop is mutually inductive with the first induction loop and / or the moving coil, and the touch chip 103 can identify the touch position according to the signal after the mutual induction of the second induction loop.

[0095] In one example, the horizontal electrodes may first form a first induction circuit, and the vertical electrodes may form a second induction circuit, and the touch chip 103 may detect a signal change after mutual induction of the second induction circuit to identify the vertical coordinate of the touch position. Then, the vertical electrodes may form a first induction circuit, and the horizontal electrodes may form a second induction circuit, and the touch chip 103 may detect a signal change after mutual induction of the second induction circuit to identify the horizontal coordinate of the touch position. Specifically, the touch chip 103 may output a driving signal to the induction circuit composed of the horizontal electrodes, and detect a signal change after mutual induction of the induction circuit composed of the vertical electrodes. Then, the touch chip 103 may output a driving signal to the induction circuit composed of the vertical electrodes, and detect a signal change after mutual induction of the induction circuit composed of the horizontal electrodes.

[0096] Fig. 9 is a schematic diagram of another induction loop provided in an embodiment of the present application, Fig.10 is a schematic diagram of another induction loop provided in an embodiment of the present application, such as Fig. 9 and Fig.10 As shown, a plurality of transverse electrodes form a first induction loop 1041, and a plurality of longitudinal electrodes form a second induction loop 1042. It should be understood that Fig. 9 and Fig.10 This is just an example. Specifically, the first sensing loop 1041 may be formed by a plurality of longitudinal electrodes, and the second sensing loop 1042 may be formed by a plurality of transverse electrodes, which will not be described in detail herein.

[0097] In the embodiment of the present application, the induction loop includes a first induction loop 1041 and a second induction loop 1042. One of the plurality of horizontal electrodes or vertical electrodes forms at least one first induction loop 1041, and the other of the plurality of horizontal electrodes or vertical electrodes forms at least one second induction loop 1042. Thus, mutual induction can be performed through the first induction loop 1041, the second induction loop 1042 and the moving coil, and the signal change after the mutual induction of the second induction loop 1042 is detected to realize the recognition of the touch position. Since the horizontal electrodes and the vertical electrodes simultaneously have mutual induction with the moving coil, the signal change amplitude after the mutual induction of the second induction loop 1042 is large, and the accuracy of touch recognition is high.

[0098] In a possible implementation, the touch chip 103 can continuously send a driving signal to the first induction loop, the dynamic coil can be mutually inductive with the first induction loop to change the current in the first induction loop, the second induction loop can be mutually inductive with the first induction loop and the dynamic coil, and the touch chip 103 identifies the touch position according to the signal after the mutual induction of the second induction loop.

[0099] The touch chip 103 continuously sends a driving signal to the first sensing loop. In one example, the driving signal is a driving voltage. After receiving the driving signal, the electrode 101 in the first sensing loop generates a driving current according to the driving signal. It should be understood that the driving signal is a voltage signal, and the electrode 101 can be equivalent to a load generating a current under the drive of the voltage.

[0100] When the moving coil approaches, since the first induction loop includes a driving current, a closed magnetic flux line is formed, the moving coil and the first induction loop are mutually inductive, and a mutual inductive current is generated in the moving coil, causing the load in the first induction loop to change. Since the voltage of the driving signal is fixed, the driving current in the first induction loop will change.

[0101] Since the relative position of the second induction loop and the first induction loop does not change, when the first induction loop generates a driving current, the second induction loop and the first induction loop are mutually inductively coupled to generate an induction signal. When the driving current in the first induction loop changes, the second induction loop and the first induction loop and the moving coil close to the first induction loop are mutually inductively coupled at the same time, and the induction signal generated in the second induction loop changes. The touch chip 103 identifies the touch position according to the signal after the mutual induction of the second induction loop.

[0102] In one example, the signal after the mutual induction of the second induction loop may be a current signal. Fig.11 is another schematic diagram of current change caused by mutual inductance between a moving coil and an induction loop provided in an embodiment of the present application, such as Fig.11As shown, when the moving coil has no mutual induction with the first induction loop, the second induction loop has mutual induction with the first induction loop to generate an identification current. When the moving coil has mutual induction with the first induction loop, the driving current in the first induction loop increases. The second induction loop has mutual induction with the moving coil and the first induction loop after the driving current increases at the same time, resulting in an increase in the identification current in the second induction loop.

[0103] In the embodiment of the present application, the touch chip 103 continuously sends a driving signal to the first induction loop, the mutual induction between the moving coil and the first induction loop causes the current generated in the first induction loop to change, and the second induction loop has mutual induction with the first induction loop and the moving coil, so that the touch position can be identified by the signal change after mutual induction in the second induction loop. Since the mutual induction between the coils is used for touch recognition, the underwater environment has little effect on the mutual inductance between the coils. Therefore, compared with the capacitive touch recognition scheme in the prior art, the touch device can be suitable for touch recognition in an underwater environment, and the horizontal electrodes and the longitudinal electrodes simultaneously have mutual induction with the moving coil, so the signal change amplitude after mutual induction in the second induction loop is large, and the accuracy of touch recognition is high.

[0104] In a possible implementation, the touch chip 103 can intermittently send a driving signal to the first induction circuit, and the moving coil can be mutually inductively connected with the first induction circuit when the touch chip 103 sends a driving signal to the first induction circuit, so that an induced current is generated in the moving coil. The second induction circuit can be mutually inductively connected with the moving coil when the touch chip 103 does not send a driving signal to the first induction circuit, and the touch chip 103 identifies the touch position according to the signal after the mutual induction of the second induction circuit.

[0105] The touch chip 103 can intermittently send a driving signal to the first sensing circuit, and the first sensing circuit can receive the driving signal. Similar to the driving signal in the above embodiment, the driving signal can be a driving voltage. After the electrode 101 in the first sensing circuit receives the driving signal, it generates a driving current according to the driving signal.

[0106] When the moving coil approaches, since a driving current flows through the first induction loop, a closed magnetic flux line is formed. At this time, the first induction loop and the second induction loop are mutually inductive. When the moving coil and the first induction loop are mutually inductive, an induced current is generated in the moving coil. When the first induction loop stops receiving the driving signal, for example: the touch chip 103 is controlled to stop outputting the driving signal to the first induction loop, the driving current in the first induction loop becomes 0. Since the induced current generated in the moving coil will not change suddenly, there is still an induced current in the moving coil for a short time. At this time, since the driving current of the first induction loop is 0, the second induction loop stops being mutually inductive with the first induction loop, but since there is still an induced current in the moving coil, the second induction loop and the moving coil are mutually inductive. The touch chip 103 recognizes the touch position according to the signal after the mutual induction of the second induction loop.

[0107] In one example, the sensing signal in the second sensing loop may be a current signal. Fig.12 is another schematic diagram of current change caused by mutual inductance between a moving coil and an induction loop provided in an embodiment of the present application, such as Fig.12 As shown, when a driving current is generated in the first induction circuit, the moving coil and the first induction circuit are mutually inductive to generate an induced current, and the second induction circuit and the first induction circuit are mutually inductive, so an identification current is generated in the second induction circuit. When the first induction circuit is not driven by a driving signal, the first induction circuit does not generate a driving current. At this time, the moving coil also includes an induced current, and the second induction circuit and the moving coil are mutually inductive, so that the identification current generated in the second induction circuit changes.

[0108] Fig.13 is a schematic diagram of another mutual inductance between a moving coil and an induction loop provided in an embodiment of the present application, such as Fig.13 As shown, for Fig.11 and Fig.12 In the example shown, the first induction loop 1041 receives a driving signal and generates a driving current, the moving coil 200 and the first induction loop 1041 are mutually inductively coupled to generate an induced current, and the second induction loop 1042 is mutually inductively coupled to at least one of the first induction loop 1041 and the moving coil 200 to generate an identification current. For example, the second induction loop 1042 is mutually inductively coupled to the first induction loop 1041 and the moving coil 200 at the same time, or the second induction loop 1042 is mutually inductively coupled to the first induction loop 1041, or the second induction loop 1042 is mutually inductively coupled to the moving coil 200.

[0109] In the embodiment of the present application, the touch chip 103 intermittently sends a driving signal to the first induction loop 1041. The first induction loop 1041 and the moving coil are mutually inductive, so that the moving coil generates an induced current. When the touch chip 103 does not send a driving signal to the first induction loop 1041, the second induction loop 1042 generates mutual induction with the moving coil. Therefore, the touch position can be identified by detecting the signal change after the mutual induction in the second induction loop 1042. Since the touch chip 103 does not need to output the driving signal all the time, and only needs to detect the signal change in the second induction loop 1042 through the touch chip 103 when the first induction loop 1041 does not generate a driving current, compared with the touch chip 103 in the aforementioned embodiment that always outputs the driving signal and always detects the second induction loop 1042, the power consumption of touch recognition is lower. Moreover, since the mutual induction between the coils is used for touch recognition, the underwater environment has little effect on the mutual induction between the coils. Therefore, compared with the capacitive touch recognition solution in the prior art, the touch device can be applied to touch recognition in an underwater environment.

[0110] Fig.14 is a schematic diagram of a touch chip provided in an embodiment of the present application, such as Fig.14 As shown, the touch chip 103 includes a current conversion unit 1031 and a processing unit 1032. The current conversion unit 1031 can generate a touch signal according to the signal after the mutual induction of the induction loop and the dynamic coil, and the processing unit 1032 can identify the touch position according to the touch signal.

[0111] In the embodiment of the present application, the touch chip 103 includes a current conversion unit 1031 and a processing unit 1032, so that the signal after mutual induction can be received by the current conversion unit 1031, and the signal after mutual induction can be converted into a touch signal, and the touch position can be identified according to the touch signal by the processing unit 1032, thereby realizing the identification of the touch position.

[0112] Fig.15 is a circuit diagram of a current conversion unit provided in an embodiment of the present application, such as Fig.15 As shown, the current conversion unit 103 includes a transimpedance amplifier D1, a first resistor R1, a second resistor R2, a first feedback resistor Rf1, a second feedback resistor Rf2, a first capacitor C1, a second capacitor C2 and an analog-to-digital converter 10311, wherein a first end of the first resistor R1 is connected to an output end of the induction loop, a second end of the first resistor R1 is connected to a positive input end of the transimpedance amplifier D1, a first end of the second resistor R2 is connected to a reference voltage VCMI, a second end of the second resistor R2 is connected to a negative input end of the transimpedance amplifier D1, a negative output end of the transimpedance amplifier D1 is connected to a first input end of the analog-to-digital converter 10311, a positive output end of the transimpedance amplifier D1 is connected to a second input end of the analog-to-digital converter 10311, a first end of the first feedback resistor Rf1 is connected to a positive input end of the transimpedance amplifier D1, and a second end of the second resistor R2 is connected to a negative input end of the transimpedance amplifier D1. The first end of the first feedback resistor Rf1 is connected to the negative output terminal of the transimpedance amplifier D1, the first end of the second feedback resistor Rf2 is connected to the negative input terminal of the transimpedance amplifier D1, the second end of the second feedback resistor Rf2 is connected to the positive output terminal of the transimpedance amplifier D1, the first end of the first capacitor C1 is connected to the first end of the first feedback resistor Rf1, the second end of the first capacitor C1 is connected to the second end of the first feedback resistor Rf1, the first end of the second capacitor C2 is connected to the first end of the second feedback resistor Rf2, the second end of the second capacitor C2 is connected to the second end of the second feedback resistor Rf2, the transimpedance amplifier D1 can convert the signal after the mutual inductance of the induction loop and the moving coil into an identification voltage, the analog-to-digital converter 1031 can receive the identification voltage, and convert the identification voltage into a touch signal.

[0113] In one example, the signal after the mutual inductance of the induction loop and the moving coil is a current signal. 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 10311.

[0114] In the embodiment of the present application, the identification current can be transimpedance amplified by the transimpedance amplifier D1, and the signal after the mutual inductance of the induction loop and the moving coil can be converted into an identification voltage. The identification voltage can be converted into a digital signal by the analog-to-digital converter 10311, thereby converting the identification current into a touch signal, so that the processing unit can identify the touch instruction according to the touch signal, thereby realizing touch recognition.

[0115] Fig.16 is a circuit diagram of another current conversion unit provided in an embodiment of the present application, such as Fig.16 As shown, the current conversion unit 103 also includes: a low-pass filter 10312, wherein the first input terminal of the low-pass filter 10312 is connected to the negative output terminal of the transimpedance amplifier D1, the second input terminal of the low-pass filter 10312 is connected to the positive output terminal of the transimpedance amplifier D1, the first output terminal of the low-pass filter 10312 is connected to the first input terminal of the analog-to-digital converter 10311, and the second output terminal of the low-pass filter 10312 is connected to the second input terminal of the analog-to-digital converter 10311. The low-pass filter 10312 can perform low-pass filtering on the identification voltage to reduce external signal interference in the identification voltage.

[0116] In an embodiment of the present application, the current conversion unit 103 also includes a low-pass filter 10312, 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 10311. The touch signal converted by the analog-to-digital converter 10311 can contain fewer touch signals corresponding to external signal interference, thereby reducing the impact of external signal interference on touch recognition and improving the accuracy of touch recognition.

[0117] Fig.17 is a circuit diagram of another current conversion unit provided in an embodiment of the present application, such as Fig.17As shown, the current conversion unit 103 also includes: a sampling and holding module 10313, the sampling and holding module 10313 includes a first switch K1, a second switch K2, a third switch K3, a fourth switch K4, a third capacitor C3 and a fourth capacitor C4, a first end of the first switch K1 is connected to the first output end of the low-pass filter 10312, a second end of the first switch K1 is simultaneously connected to the first end of the third capacitor C3 and the first end of the second switch K2, a second end of the second switch K2 is connected to the first input end of the analog-to-digital converter 10311, a second end of the third capacitor C3 is grounded, a first end of the third switch K3 is connected to the second output end of the low-pass filter 10312, a second end of the third switch K3 is simultaneously connected to the first end of the fourth capacitor C4 and the first end of the fourth switch K4, a second end of the fourth switch K4 is connected to the second input end of the analog-to-digital converter 10311, a second end of the fourth capacitor C4 is grounded, and the sampling and holding module 10313 can maintain the identification voltage.

[0118] Since the signal after the mutual induction of the induction loop and the moving coil 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 10311 and converted into touch signals, a sampling and holding circuit is provided. When the analog-to-digital converter 10311 performs digital-to-analog conversion, the subsequent identification voltage can be temporarily stored to avoid the analog-to-digital converter 10311 missing part of the identification voltage due to the change of the identification voltage. Specifically, when the analog-to-digital converter 10311 performs digital-to-analog conversion, the second switch K2 and / or the fourth switch K4 can be disconnected, and the identification voltage can be temporarily stored through the third capacitor C3 and the fourth capacitor C4. When the analog-to-digital converter 10311 is idle, the first switch K1 and / or the third switch K3 are disconnected, and the second switch K2 and / or the fourth switch K4 are closed, so that the analog-to-digital converter 10311 receives the identification voltage temporarily stored in the capacitor, and the sampling and holding effect is achieved through the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, the third capacitor C3 and the fourth capacitor C4.

[0119] In the embodiment of the present application, the current conversion unit 103 also includes a sampling and holding module 10313. The sampling and holding module 10313 can sample and hold the identification voltage output by the transimpedance amplifier D1 through the first switch K1, the second switch K2, the third switch K3, the fourth switch K4, the third capacitor C3 and the fourth capacitor C4. This can avoid the change in the identification voltage due to the change in the signal after the mutual inductance between the induction loop and the moving coil, causing the analog-to-digital converter 10311 to miss part of the identification voltage, and can ensure that the analog-to-digital converter 10311 converts all the identification voltages into touch signals, thereby improving the accuracy of touch recognition.

[0120] Fig.18is a circuit diagram of another current conversion unit provided in an embodiment of the present application, such as Fig.18 As shown, the current conversion unit 103 also includes: a buffer amplifier 10314, a first input terminal of the buffer amplifier 10314 is connected to the second terminal of the second switch K2, a second input terminal of the buffer amplifier 10314 is connected to the second terminal of the fourth switch K4, a first output terminal of the buffer amplifier 10314 is connected to the first input terminal of the analog-to-digital converter 10311, a second output terminal of the buffer amplifier 10314 is connected to the second input terminal of the analog-to-digital converter 10311, and the buffer amplifier 10314 can perform signal amplification processing on the identification voltage.

[0121] In the embodiment of the present application, the current conversion unit 103 also includes a buffer amplifier 10314. The buffer amplifier 10314 can amplify the identification voltage signal. The buffer amplifier 10314 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 10311 larger, avoiding the inability to identify touch due to the small identification voltage causing the analog-to-digital converter 10311 to be unable to convert into a touch signal, thereby improving the accuracy of touch recognition.

[0122] The embodiment of the present application further provides a touch chip 103, which is connected to the electrode 101. The electrode 101 includes a plurality of transverse electrodes and a plurality of longitudinal electrodes. At least two electrodes 101 are connected via a switch tube 102. The touch chip 103 can send a driving signal to the electrode 101, and after the switch tube 102 is closed to connect at least two electrodes 101 to form at least one induction loop, the touch chip 103 performs mutual induction with an external dynamic coil, and performs touch position recognition according to the signal after the mutual induction, wherein the at least two electrodes 101 include at least one of a transverse electrode and a longitudinal electrode.

[0123] In the embodiment of the present application, the touch control chip 103 may be the touch control chip 103 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.

[0124] Fig.19 is a schematic diagram of a display screen module provided in an embodiment of the present application, such as Fig.19 As shown, the display screen module 300 includes the touch control device 100 in any of the above embodiments.

[0125] It should be understood that the multiple switch tubes 102 in the touch device 100 may be multiple switch tubes 102 in the TFT layer of the display screen module 300 , and this embodiment of the present application does not impose any limitation thereto.

[0126] Fig. 20is a schematic diagram of an electronic device provided in an embodiment of the present application, such as Fig. 20 As shown, the electronic device 400 includes a processor 401 and the display screen module 300 in the above embodiment. The processor 401 is electrically connected to the display screen module 300. The processor 401 is used to send a control signal to the touch device 100 to close the switch tube 102 in the touch device 100.

[0127] In the embodiment of the present application, the processor 401 can send a control signal to the touch device 100 to close the switch tube 102 in the touch device 100, so that the electrode 101 forms at least one induction loop, thereby enabling mutual induction with the external dynamic coil through the induction loop. The touch device 100 in the embodiment of the present application uses the mutual inductance between the coils for touch recognition. Since the underwater environment has little effect on the mutual inductance between the coils, the touch device 100 can be suitable for touch recognition in an underwater environment compared to the capacitive touch recognition scheme in the prior art. When the switch tube 102 is not closed, the touch device 100 can perform traditional capacitive touch recognition and can be suitable for touch recognition in a normal environment. Therefore, the touch device 100 can be suitable for touch recognition in a variety of usage scenarios and has high applicability.

[0128] Fig.21 is a schematic diagram of a touch device provided in an embodiment of the present application, such as Fig.21 As shown, the touch control device includes: a moving coil 200, such as Fig. 20 As shown, the touch device can be a glove including the dynamic coil 200, or the dynamic coil 200 attached to a finger, or a stylus pen integrated with the dynamic coil 200, etc. In one example, the dynamic coil 200 can be a planar coil composed of multiple turns of copper wire, and the dynamic coil 200 can be double-sidedly bonded and protected by a soft material.

[0129] Fig. 22 is a schematic diagram of a moving coil provided in an embodiment of the present application, such as Fig. 22 As shown, the touch control device further includes: a fifth capacitor C5, and the moving coil 200 is connected in series with the fifth capacitor C5.

[0130] The moving coil 200 can interact with the induction loop in the touch control device 100. Fig.23 is an equivalent circuit diagram of a mutual inductance provided in an embodiment of the present application, such as Fig.23 As shown, Fig.23The induction circuit in can be the induction circuit in any of the above embodiments, the driving electrode 101101 in the induction circuit can be equivalent to the first equivalent inductance L1, the first equivalent capacitance C6 and the first equivalent resistance R3, and under the drive of the driving signal, a driving current is generated in the induction circuit, the moving coil 200 can be equivalent to the second equivalent inductance L2 and the second equivalent resistance R4, the moving coil 200 is connected in series with the fifth capacitor C5, and the moving coil 200 can have mutual inductance with the induction circuit.

[0131] It should be understood that the second equivalent inductor L2 and the fifth capacitor C5 can form an LC circuit, and the resonant frequency of the moving coil 200 can be adjusted by adjusting the Q value of the LC circuit. Specifically, due to The resonant frequency of the moving coil 200 can be adjusted by adjusting the size of the fifth capacitor C5 connected in series with the moving coil 200, or adjusting the size of the second equivalent inductance L2 in the moving coil 200, for example, adjusting the number of turns of the moving coil 200. The frequency range of the driving signal driving the induction loop is [50k, 500k], the resonant frequency range of the LC circuit is [50k, 500k], the Q value range is [2, 10], the value range of R4 is [1Ω, 500Ω], the value range of L2 is [1nh, 1mh], and the value range of C5 is [10pf, 100Uf]. In another example, the moving coil 200 can use the parasitic capacitance in the coil to adjust the resonant frequency, which will not be repeated here.

[0132] Fig.24 is a schematic diagram of the relationship between the resonant frequency and the gain provided in an embodiment of the present application, such as Fig.24 As shown, when the frequency of the driving signal driving the induction loop is 100kHz, the closer the resonant frequency of the moving coil 200 is to 100Hz, the greater the gain of the mutual inductance, the higher the sensitivity of the touch recognition, and as shown in FIG. Fig.24 The gain curves in the figure are AM1

[10] to AM1[1] from top to bottom, respectively. The inductance values ​​decrease in sequence. According to the inductance values ​​in the figure, the smaller the value of the equivalent inductance L2, the higher the gain.

[0133] In the embodiment of the present application, the moving coil 200 is connected in series with a fifth capacitor C5, so that the frequency of the LC resonance of the moving coil 200 can be adjusted by the fifth capacitor C5, so that the LC resonance of the moving coil 200 is close to the driving frequency of the induction loop, so that the gain of the mutual inductance is increased, and the sensitivity of touch recognition can be improved.

[0134] 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.

[0135] 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.

[0136] 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.

[0137] 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 send a driving signal to the electrode; The electrodes include a plurality of transverse electrodes and a plurality of longitudinal electrodes; A switch tube, at least two electrodes are connected through the switch tube, and when the switch tube is closed, the at least two electrodes are connected to form at least one induction loop, and the induction loop is used for mutual induction with an external dynamic coil, and the touch chip identifies the touch position according to the signal after the mutual induction, wherein the at least two electrodes include at least one of the horizontal electrode and the vertical electrode.

2. The touch control device according to claim 1, characterized in that: After the switch tube is disconnected, the electrodes are in a disconnected state, the touch chip sends a driving signal to one of the multiple horizontal electrodes and the multiple vertical electrodes, and performs position recognition according to the sensing signal output by the other one of the multiple horizontal electrodes and the multiple vertical electrodes.

3. The touch control device according to claim 2, characterized in that: One of the plurality of transverse electrodes and the plurality of longitudinal electrodes serves as both a driving electrode and a receiving electrode. The touch control chip sends a driving signal to the driving electrode and performs position recognition according to a sensing signal output by the receiving electrode.

4. The touch control device according to claim 1, characterized in that: At least two of the electrodes are one of the transverse electrodes and the longitudinal electrodes, and at least two of the electrodes include a first electrode and a second electrode that are adjacently arranged. When the switch tube is closed, the first electrode and the second electrode are connected to form the induction loop.

5. The touch control device according to claim 4, characterized in that: The at least two electrodes are connected via the switch tube, comprising: One end of the first electrode is connected to the touch chip, and the other end of the first electrode is connected to one end of the switch tube; One end of the second electrode is connected to the touch control chip, and the other end of the second electrode is connected to the other end of the switch tube.

6. The touch control device according to claim 1, characterized in that: At least two of the electrodes are one of the transverse electrodes and the longitudinal electrodes, at least two of the electrodes include at least three electrodes arranged adjacent to each other, and the switch tube includes at least two switch tubes, which, when closed, connect the at least three electrodes to form the induction loop.

7. The touch control device according to claim 6, characterized in that: When the induction loop includes i electrodes, the first end of the Kth electrode among the i electrodes and the first end of the Lth electrode among the i electrodes are connected through a switch tube, and the second end of the K+1th electrode among the i electrodes and the second end of the Lth electrode among the i electrodes are connected through a switch tube, wherein K+L=i+1, and when i is an odd number, the second end of the Kth electrode among the i electrodes is connected to the touch control chip, and the The first end of the Kth electrode among the i electrodes is connected to the touch control chip. When i is an even number, the second end of the Kth electrode among the i electrodes is connected to the touch control chip. The second end of each electrode is connected to the touch control chip, and i is a positive integer greater than or equal to 3.

8. The touch control device according to any one of claims 1 to 7, characterized in that: The induction loop includes an induction loop formed by one of the transverse electrode and the longitudinal electrode; The touch chip is used to send a driving signal to the induction loop. The induction loop and the dynamic coil perform mutual induction. The touch chip identifies the touch position according to the change of the signal in the induction loop after the mutual induction.

9. The touch control device according to any one of claims 1 to 7, characterized in that: The at least one induction loop comprises a first induction loop and a second induction loop; The first induction loop includes an induction loop formed by one of the transverse electrode and the longitudinal electrode, and the second induction loop includes an induction loop formed by the other of the transverse electrode and the longitudinal electrode; The touch chip is used to send a driving signal to the first induction loop, and the first induction loop and the moving coil are mutually inductive, so that an induced current is generated on the moving coil; The second induction loop is used for mutual induction with the first induction loop and / or the dynamic coil, and the touch chip identifies the touch position according to the signal after the mutual induction of the second induction loop.

10. The touch control device according to claim 9, characterized in that: The touch control chip is used to continuously send a driving signal to the first sensing loop; The moving coil is used for mutual induction with the first induction loop to change the current in the first induction loop; The second induction loop is used for mutual induction with the first induction loop and the dynamic coil, and the touch chip recognizes the touch position according to the signal after the mutual induction of the second induction loop.

11. The touch control device according to claim 9, characterized in that: The touch control chip is used to intermittently send a driving signal to the first sensing loop; The moving coil is used for mutual induction with the first induction loop when the touch control chip sends a driving signal to the first induction loop, so as to generate an induced current on the moving coil; The second induction loop is used for mutual induction with the moving coil when the touch chip does not send a driving signal to the first induction loop, and the touch chip identifies the touch position according to the signal after the mutual induction of the second induction loop.

12. The touch control device according to claim 1, wherein: The touch control chip includes a current conversion unit and a processing unit; The current conversion unit is used to generate a touch signal according to a signal after mutual induction between the induction loop and the moving coil; The processing unit is used to identify the touch position according to the touch signal.

13. The touch control device according to claim 12, 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 first capacitor, a second capacitor and an analog-to-digital converter; The first end of the first resistor is connected to the output end of the induction loop, 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 first capacitor is connected to the first end of the first feedback resistor, the second end of the first capacitor is connected to the second end of the first feedback resistor, the first end of the second capacitor is connected to the first end of the second feedback resistor, and the second end of the second capacitor is connected to the second end of the second feedback resistor; The transimpedance amplifier is used to convert the signal after the mutual inductance between the induction loop and the moving coil into an identification voltage; The analog-to-digital converter is used to receive the identification voltage and convert the identification voltage into the touch signal.

14. The touch control device according to claim 13, 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.

15. The touch control device according to claim 14, characterized in that: The current conversion unit further includes: a sampling and holding module; The sampling and holding module includes a first switch, a second switch, a third switch, a fourth switch, a third capacitor and a fourth capacitor; The first end of the first switch is connected to the first output end of the low-pass filter, the second end of the first switch is connected to the first end of the third capacitor and the first end of the second switch at the same time, the second end of the second switch is connected to the first input end of the analog-to-digital converter, and the second end of the third capacitor is grounded; A first end of the third switch is connected to the second output end of the low-pass filter, a second end of the third switch is connected to the first end of the fourth capacitor and the first end of the fourth switch, a second end of the fourth switch is connected to the second input end of the analog-to-digital converter, and a second end of the fourth capacitor is grounded; The sampling and holding module is used to hold the identification voltage.

16. The touch control device according to claim 15, characterized in that: The current conversion unit further includes: a buffer amplifier; The first input terminal of the buffer amplifier is connected to the second terminal of the second switch, the second input terminal of the buffer amplifier is connected to the second terminal of the fourth switch, the first output terminal of the buffer amplifier is connected to the first input terminal of the analog-to-digital converter, and the 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.

17. A touch chip, characterized in that: The electrodes include a plurality of transverse electrodes and a plurality of longitudinal electrodes, and at least two electrodes are connected via a switch tube; The touch chip is used to send a driving signal to the electrode, and after the switch tube is closed to connect the at least two electrodes to form at least one induction loop, mutual induction is performed with an external dynamic coil, and touch position recognition is performed according to the signal after the mutual induction, wherein the at least two electrodes include at least one of the horizontal electrode and the vertical electrode.

18. A display screen module, characterized in that: It comprises a touch control device as described in any one of claims 1-16.

19. An electronic device, characterized in that: comprising a processor and the display screen module according to claim 18; The processor is electrically connected to the display screen module; The processor is used to send a control signal to the touch control device to close at least part of the switch tubes included in the touch control device.

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