Touch control device, touch control chip and vehicle-mounted touch control equipment

Abstract

The embodiment of the utility model provides a touch control device, a touch control chip and vehicle-mounted touch control equipment. The touch control device comprises the touch control chip, a plurality of touch control keys and at least two protection electrodes, the touch control chip is electrically connected with the touch control key and the protection electrode respectively; the plurality of touch keys comprise a first touch key and a second touch key, and the at least two protection electrodes comprise a first protection electrode and a second protection electrode; the touch control chip is used for outputting a first driving signal to the first touch control key and the first protection electrode and outputting a second driving signal to the second touch control key and the second protection electrode, the first driving signal and the second driving signal are opposite in phase, and touch control detection is carried out based on an induction signal generated by the touch control key. The touch device provided by the embodiment of the utility model is small in electromagnetic interference, and can prevent the touch key from being mistakenly triggered by water drops.

Description

Technical Field

[0001] This application relates to the field of touch chip technology, and more particularly to a touch device, a touch chip, and an in-vehicle touch device. Background Technology

[0002] With the development of technology, touch devices are now commonly found in various electronic devices, such as computers, tablets, mobile phones, and in-vehicle systems. These touch devices serve as input devices for electronic devices, sensing pressure from the user's finger or other components and providing feedback and / or instructing the device to perform corresponding functions. In the automotive field, the electromagnetic interference (EMI) requirements for touch devices are higher than those for consumer electronics. When touch devices are used in automotive systems, the EMI generated by the touch device must comply with the vehicle's EMI standards.

[0003] Currently, in-vehicle touch buttons use a self-capacitive method for touch detection, and in order to improve the touch refresh rate, multiple touch buttons are driven simultaneously for touch detection.

[0004] However, when multiple touch buttons are driven simultaneously for touch detection, the resulting EMI is large and cannot meet EMI standards. Furthermore, when water droplets fall on the touch button detection area, the touch buttons may be accidentally triggered. Utility Model Content

[0005] In view of this, embodiments of this application provide a touch device, a touch chip, and an in-vehicle touch device to at least partially solve the above-mentioned problems.

[0006] According to a first aspect of the present application, a touch device is provided, comprising: a touch chip, a plurality of touch buttons, and at least two protective electrodes; the touch chip is electrically connected to the touch buttons and the protective electrodes respectively; the plurality of touch buttons include a first touch button and a second touch button, and the at least two protective electrodes include a first protective electrode and a second protective electrode, wherein the projection of the first touch button on the first protective electrode is located within the edge of the first protective electrode, and the projection of the second touch button on the second protective electrode is located within the edge of the second protective electrode; the touch chip is configured to output a first driving signal to the first touch button and the first protective electrode, and to output a second driving signal to the second touch button and the second protective electrode, wherein the first driving signal and the second driving signal are out of phase, and to perform touch detection based on the sensing signal generated by the touch buttons.

[0007] In one possible implementation, the plurality of touch buttons include at least one first button group and at least one second button group. The first button group includes a plurality of first touch buttons arranged adjacent to each other, and the second button group includes a plurality of second touch buttons arranged adjacent to each other. The first button group and the second button group are arranged adjacent to each other.

[0008] In one possible implementation, the touch device further includes: at least two water flow detection units, each of the protective electrodes corresponding to one water flow detection unit, and different protective electrodes corresponding to different water flow detection units; the water flow detection units are electrically connected to the touch chip; for any of the protective electrodes, the projection of the touch button on the protective electrode is located within the edge of the projection of the water flow detection unit on the protective electrode, and does not intersect with the projection of the water flow detection unit on the protective electrode; the touch chip is configured to output a first driving signal to the water flow detection unit corresponding to the first protective electrode, and output a second driving signal to the water flow detection unit corresponding to the second protective electrode, and control the activation state of the touch button surrounded by the water flow detection unit according to the water flow detection signal output by the water flow detection unit.

[0009] In one possible implementation, the projection of the water flow detection unit onto the protective electrode is located within the edge of the protective electrode.

[0010] In one possible implementation, the protection electrode includes a first sub-electrode and a second sub-electrode, all of which are sheet-like structures. The first and second sub-electrodes are stacked, and the water flow detection unit is located between them. The touch button is stacked on top of the second sub-electrode. The projection of the water flow detection unit onto the first sub-electrode is located within the edge of the first sub-electrode. The projection of the second sub-electrode onto the water flow detection unit is located within the edge of the water flow detection unit.

[0011] In one possible implementation, the water flow detection unit is an annular sheet structure; the water flow detection unit is stacked on the protective electrode, and the touch button is located inside the annular hole of the water flow detection unit.

[0012] In one possible implementation, the touch device further includes: a ground electrode; the ground electrode is grounded; and in a direction perpendicular to the ground electrode, the projection of the protective electrode onto the ground electrode is located within the edge of the ground electrode, and the projections of different protective electrodes onto the ground electrode do not intersect.

[0013] In one possible implementation, the ground electrode is a sheet electrode, and the protective electrode is stacked on the ground electrode.

[0014] In one possible implementation, the ground electrode has a ring structure, and the protective electrode is located inside the ring hole of the ground electrode.

[0015] According to a second aspect of the present application, a touch chip is provided, the touch chip being electrically connected to a plurality of touch buttons and at least two protection electrodes respectively; wherein, the plurality of touch buttons include a first touch button and a second touch button, the at least two protection electrodes include a first protection electrode and a second protection electrode, the projection of the first touch button on the first protection electrode is located within the edge of the first protection electrode, and the projection of the second touch button on the second protection electrode is located within the edge of the second protection electrode; the touch chip is configured to output a first driving signal to the first touch button and the first protection electrode, and to output a second driving signal to the second touch button and the second protection electrode, the first driving signal and the second driving signal being out of phase, and to perform touch detection based on the sensing signal generated by the touch buttons.

[0016] According to a third aspect of the embodiments of this application, an in-vehicle touch device is provided, including: the touch device as described in the first aspect.

[0017] According to the embodiments of this application, the touch device includes a touch chip, a plurality of touch buttons, and at least two protective electrodes. A first touch button is surrounded by a first protective electrode, and a second touch button is surrounded by a second protective electrode. The touch chip outputs a first driving signal to the first touch button and the first protective electrode, and outputs a second driving signal to the second touch button and the second protective electrode. Touch detection is performed based on the sensing signals output by the touch buttons to realize the touch detection function of the touch buttons. Since the first driving signal and the second driving signal are out of phase, when the touch chip drives the first touch button and the first protective electrode, as well as the second touch button and the second protective electrode, the EMI generated by the driving signals is at least partially canceled out, thereby reducing the EMI of the touch device and enabling the touch device to meet EMI standards. Furthermore, since the first touch button is surrounded by the first protective electrode, the second touch button is surrounded by the second protective electrode, and the touch buttons and protective electrodes receive the same driving signal, the touch buttons will not be accidentally triggered when water droplets fall on the edge of the touch buttons, thus preventing accidental button triggering due to water droplets. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of a touch device provided in an embodiment of this application;

[0020] Figure 2 This is a schematic diagram of a touch button provided in an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of another touch device provided in an embodiment of this application;

[0022] Figure 4 This is a schematic diagram of a touch device including a water flow detection unit provided in an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of a stacking structure provided in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of another stacking structure provided in an embodiment of this application;

[0025] Figure 7 This is a schematic diagram of a touch device including a ground electrode provided in an embodiment of this application;

[0026] Figure 8 This is a schematic diagram of a touch device including a ground electrode and a water flow detection unit provided in an embodiment of this application;

[0027] Figure 9 This is a schematic diagram of yet another stacking structure provided in an embodiment of this application;

[0028] Figure 10 This is a schematic diagram of another stacking structure provided in an embodiment of this application;

[0029] Figure 11 This is a schematic diagram of an in-vehicle touch screen device provided in an embodiment of this application. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solutions in the embodiments of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art should fall within the protection scope of the embodiments of this application.

[0031] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0032] It should be understood that although the terms first, second, third, etc., may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0033] As mentioned earlier, with the development of technology, touch devices are now found in various electronic devices, such as computers, tablets, mobile phones, and in-vehicle devices. These touch devices serve as input devices for electronic devices, sensing the pressure of a user's finger or other components and providing pressure feedback and / or instructing the device to perform corresponding functions. In the automotive field, the electromagnetic interference (EMI) requirements for touch devices are higher than those for consumer electronics. When touch devices are used in automotive equipment, the EMI generated by the touch device must comply with the vehicle's EMI standards. Currently, automotive touch buttons use self-capacitance for touch detection, and to improve the touch refresh rate, multiple touch buttons are driven simultaneously for touch detection. However, when multiple touch buttons are driven simultaneously for touch detection, the resulting EMI is relatively large and cannot meet EMI standards. Furthermore, when water droplets fall on the touch button detection area, the touch buttons may be falsely triggered. For example, when a water droplet is on the edge of a touch button, it may connect the touch button to other structures on the circuit board, causing the touch button to generate a sensing signal and thus falsely triggering the touch button.

[0034] This application provides a touch device including a touch chip, a plurality of touch buttons, and at least two protective electrodes. A first touch button is surrounded by a first protective electrode, and a second touch button is surrounded by a second protective electrode. The touch chip outputs a first driving signal to the first touch button and the first protective electrode, and a second driving signal to the second touch button and the second protective electrode. Touch detection is performed based on the sensing signals output by the touch buttons, thus realizing the touch detection function of the touch buttons. Since the first and second driving signals are out of phase, the EMI generated by the driving signals at least partially cancels each other out when the touch chip drives the first touch button and the first protective electrode, as well as the second touch button and the second protective electrode. This reduces the EMI of the touch device, enabling it to meet EMI standards. Furthermore, since the first touch button is surrounded by the first protective electrode, and the second touch button is surrounded by the second protective electrode, and the touch buttons and protective electrodes receive the same driving signal, the touch buttons will not be accidentally triggered when water droplets fall on their edges, preventing accidental button triggering due to water droplets.

[0035] The touch device provided in this application is described below through embodiments.

[0036] Figure 1 This is a schematic diagram of a touch device provided in an embodiment of this application, such as... Figure 1 As shown, the touch device 100 includes: a touch chip 101, a plurality of touch buttons 102, and at least two protection electrodes 103. The touch chip 101 is electrically connected to the touch buttons 102 and the protection electrodes 103 respectively. The plurality of touch buttons 102 include a first touch button 1021 and a second touch button 1022. The at least two protection electrodes 103 include a first protection electrode 1031 and a second protection electrode 1032. The projection of the first touch button 1021 on the first protection electrode 1031 is located within the edge of the first protection electrode 1031, and the projection of the second touch button 1022 on the second protection electrode 1032 is located within the edge of the second protection electrode 1032.

[0037] The touch chip 101 can output a first driving signal to the first touch button 1021 and the first protection electrode 1031, and output a second driving signal to the second touch button 1022 and the second protection electrode 1032. The first driving signal and the second driving signal are out of phase, and touch detection is performed based on the sensing signal generated by the touch button 102.

[0038] The touch device 100 includes a touch chip 101, multiple touch buttons 102, and at least two protection electrodes 103. The multiple touch buttons 102 include a first touch button 1021 and a second touch button 1022. The first touch button 1021 is surrounded by a first protection electrode 1031, and the second touch button 1022 is surrounded by a second protection electrode 1032. During the process of the touch chip 101 outputting a first driving signal to the first touch button 1021 and the first protection electrode 1031, the touch chip 101 also outputs a second driving signal to the second touch button 1022 and the second protection electrode 1032. That is, the touch chip 101 simultaneously outputs the first driving signal and the second driving signal. The first driving signal and the second driving signal are out of phase, that is, the phase difference between the first driving signal and the second driving signal is 180 degrees. The first driving signal and the second driving signal can be square wave signals, sine wave signals, trapezoidal wave signals, etc.

[0039] Optionally, multiple touch buttons 102 can be disposed on the same circuit board, which can be a flexible printed circuit (FPC) or a printed circuit board (PCB), etc. The multiple touch buttons 102 can be made of conductive materials, such as metal or semiconductor materials. In one example, the multiple touch buttons 102 can be made of indium tin oxide (ITO), such as a transparent ITO film; in another example, the touch buttons 102 can be bulk metal electrodes. Optionally, the touch chip 101 can output drive signals to the touch buttons 102 through metal traces on the circuit board. Optionally, the length of the metal traces is less than or equal to 30 cm to ensure the detection performance of the touch buttons 102.

[0040] When a finger touches the surface, the first touch button 1021 and the second touch button 1022 serve as both driving and receiving electrodes. The touch chip 101 sends a driving signal to the driving electrode and performs touch detection based on the touch signal output by the receiving electrode. Specifically, the first touch button 1021 receives a first driving signal, and the second touch button 1022 receives a second driving signal. Taking the first touch button 1021 as an example, when a finger touches the detection area of ​​the first touch button 1021, the self-capacitance between the first touch button 1021 and the ground wire increases, resulting in an increase in the current between the first touch button 1021 and the touch chip 101, generating an induction signal. The touch chip 101 can detect the finger touch on the first touch button 1021 based on the induction signal, thereby triggering the first touch button 1021.

[0041] It should be understood that since the first touch button 1021 and the first protection electrode 1031 receive the first driving signal, and the second touch button 1022 and the second protection electrode 1032 receive the second driving signal, and the first and second driving signals are out of phase, when the touch chip 101 drives the first touch button 1021 and the first protection electrode 1031, as well as the second touch button 1022 and the second protection electrode 1032, the EMI generated by the first and second driving signals will cancel each other out, which can effectively reduce EMI. It should also be understood that when a water droplet falls between the touch button 102 and the protection electrode 103, since the touch button 102 and the protection electrode 103 receive the same driving signal (the first touch button 1021 and the first protection electrode 1031 receive the first driving signal, and the second touch button 1022 and the second protection electrode 1032 receive the second driving signal), there will be no change in the signal. The first touch button 1021 and the second touch button 1022 will not generate a sensing signal, and the first touch button 1021 and the second touch button 1022 will not be triggered.

[0042] In this embodiment, the touch device 100 includes a touch chip 101, a plurality of touch buttons 102, and at least two protection electrodes 103. A first touch button 1021 of the touch buttons 102 is surrounded by a first protection electrode 1031, and a second touch button 1022 of the touch buttons 102 is surrounded by a second protection electrode 1032. The touch chip 101 outputs a first driving signal to the first touch button 1021 and the first protection electrode 1031, and outputs a second driving signal to the second touch button 1022 and the second protection electrode 1032. Touch detection is performed based on the sensing signals output by the touch buttons 102, thus realizing the touch detection function of the touch buttons 102. Since the first and second driving signals are out of phase... Therefore, when the touch chip 101 drives the first touch button 1021 and the first protection electrode 1031, as well as the second touch button 1022 and the second protection electrode 1032, the EMI generated by the drive signal at least partially cancels each other out, thereby reducing the EMI of the touch device 100 and making the touch device 100 meet the EMI standard. Furthermore, since the first touch button 1021 is surrounded by the first protection electrode 1031 and the second touch button 1022 is surrounded by the second protection electrode 1032, and the touch button 102 and the protection electrode 103 receive the same drive signal, when water droplets fall on the edge of the touch button 102, the touch button 102 will not be accidentally triggered, thus preventing the accidental triggering of the button due to water droplets.

[0043] In one possible implementation, the plurality of touch buttons 102 include at least one first button group 1023 and at least one second button group 1024. The first button group 1023 includes a plurality of first touch buttons 1021 arranged adjacent to each other, and the second button group 1024 includes a plurality of second touch buttons 1022 arranged adjacent to each other. The first button group 1023 and the second button group 1024 are arranged adjacent to each other.

[0044] The following examples illustrate this.

[0045] Figure 2 This is a schematic diagram of a touch button provided in an embodiment of this application, such as... Figure 2 As shown, the first button group 1023 includes a plurality of adjacent first touch buttons 1021, and the second button group 1024 includes a plurality of adjacent second touch buttons 1022. The first button group 1023 and the second button group 1024 are adjacent to each other, and each includes two protection electrodes 103. The touch buttons 102 in the first button group 1023 are all located within the first protection electrode 1031, and the second touch buttons 1022 in the second button group 1024 are all located within the second protection electrode 1032. It should be understood that since the first button group 1023 and the second button group 1024 are adjacent to each other, and the first protection electrode 1031 and the second protection electrode 1032 are adjacent to each other, the EMI generated by the first driving signal and the second driving signal with opposite phases output by the touch chip 101 will cancel each other out.

[0046] Optionally, the distance between the first button group 1023 and the second button group 1024 is less than or equal to a first distance threshold. It should be understood that the greater the distance between the first touch button 1021 and the second touch button 1022, the worse the EMI cancellation effect of the first and second driving signals. Therefore, a distance between the first button group 1023 and the second button group 1024 that is less than or equal to the first distance threshold can ensure the EMI cancellation effect. Optionally, the first distance threshold can be less than or equal to 30 cm.

[0047] Optionally, the difference in the number of touch buttons 102 in adjacent first button group 1023 and second button group 1024 is less than a number threshold. It should be understood that the greater the difference in the number of touch buttons 102 in the first button group 1023 and second button group 1024, the worse the mutual cancellation effect of EMI generated by the first driving signal and the second driving signal. Therefore, the difference in the number of touch buttons 102 in the first button group 1023 and second button group 1024 is less than the number threshold to ensure the mutual cancellation effect of EMI. Optionally, the number threshold is less than or equal to 4 to ensure a better EMI cancellation effect. Optionally, when the number of the first button group 1023 is twice the number of the second button group 1024, the number of the second touch buttons 1022 in the second button group 1024 can be the sum of the number of the first touch buttons 1021 in the two adjacent first button groups 1023. Alternatively, when the number of the second button group 1024 is twice the number of the first button group 1023, the number of the first touch buttons 1021 in the first button group 1023 can be the sum of the number of the second touch buttons 1022 in the two adjacent second button groups 1024, so as to ensure a better EMI cancellation effect.

[0048] In this embodiment, the plurality of touch buttons 102 include at least one first button group 1023 and at least one second button group 1024. The first button group 1023 includes a plurality of adjacent first touch buttons 1021, and the second button group 1024 includes a plurality of adjacent second touch buttons 1022. Since the first button group 1023 and the second button group 1024 are adjacent to each other, and the first touch buttons 1021 and the second touch buttons 1022 receive driving signals with opposite phases output by the touch chip 101, the first button group 1023 and the second button group 1024 generate... The generated EMI will cancel each other out, which can reduce the EMI of the touch device 100. Since the first button group 1023 includes multiple first touch buttons 1021 and the second button group 1024 includes multiple second touch buttons 1022, the multiple first touch buttons 1021 in the first button group 1023 can be surrounded by the same first protection electrode 1031, and the multiple second touch buttons 1022 in the second button group 1024 can be surrounded by the same second protection electrode 1032. A smaller number of protection electrodes 103 can be set, reducing the production cost of the touch device 100.

[0049] Figure 3 This is a schematic diagram of another touch device provided in the embodiments of this application, such as... Figure 3As shown, the touch device 100 also includes at least two water flow detection units 104. Each protection electrode 103 corresponds to one water flow detection unit 104. Different protection electrodes 103 correspond to different water flow detection units 104. The water flow detection unit 104 is electrically connected to the touch chip 101. For any protection electrode 103, the projection of the touch button 102 on the protection electrode 103 is located within the edge of the projection of the water flow detection unit 104 on the protection electrode 103 and does not intersect with the projection of the water flow detection unit 104 on the protection electrode 103.

[0050] The touch chip 101 can output a first driving signal to the water flow detection unit 104 corresponding to the first protection electrode 1031 and output a second driving signal to the water flow detection unit 104 corresponding to the second protection electrode 1032. Based on the water flow detection signal output by the water flow detection unit 104, the chip 101 can control the activation state of the touch button 102 surrounded by the water flow detection unit 104.

[0051] The touch device 100 may further include multiple water flow detection units 104, the number of which is the same as the number of protection electrodes 103. Each protection electrode 103 corresponds to one water flow detection unit 104, and different protection electrodes 103 correspond to different water flow detection units 104. The touch chip 101 simultaneously outputs a first driving signal to the first protection electrode 1031, the first touch button 1021, and the water flow detection unit 104 disposed in the first protection electrode 1031, and simultaneously outputs a second driving signal to the second protection electrode 1032, the second touch button 1022, and the water flow detection unit 104 disposed in the second protection electrode 1032. It should be understood that the first driving signal and the second driving signal are out of phase, and the EMI generated by the first driving signal and the second driving signal can cancel each other out. In one example, the water flow detection unit 104 can be a metal electrode, a metal trace on a circuit board, etc.

[0052] When there is a large water flow, large water droplets or continuous water flows will connect the water flow detection unit 104 located on the first protection electrode 1031 and the water flow detection unit 104 located on the second protection electrode 1032. Since the water flow detection unit 104 on the first protection electrode 1031 receives a first driving signal and the water flow detection unit 104 on the second protection electrode 1032 receives a second driving signal, and the first and second driving signals are out of phase, after the water flow detection units 104 are connected, the water flow detection units 104 on the first protection electrode 1031 and the water flow detection units 104 on the second protection electrode 1032... The signals transmitted within element 104 at least partially cancel each other out, causing both the water flow detection unit 104 located on the first protection electrode 1031 and the water flow detection unit 104 located on the second protection electrode 1032 to generate water flow detection signals. The touch chip 101 can control the activation state of the touch button 102 surrounded by the water flow detection unit 104 according to the water flow detection signal. For example, when the water flow detection signal is detected, the triggering of the touch button 102 can be suppressed, that is, the touch chip 101 detects the sensing signal transmitted by the touch button 102 but does not perform the related recognition operation, or the touch chip 101 stops outputting the drive signal to the touch button 102.

[0053] It should be understood that for small water droplets, since the water flow detection unit 104, the protection electrode 103, and the touch button 102 receive the same driving signal, when at least two of the water flow detection unit 104, the protection electrode 103, and the touch button 102 are connected due to the small water droplet, the water flow detection unit 104 will not generate a water flow detection signal, and the touch button 102 will not generate a sensing signal.

[0054] It should be noted that for any protective electrode 103, the projection of the touch button 102 on the protective electrode 103 is located within the edge of the projection of the water flow detection unit 104 on the protective electrode 103, and does not intersect with the projection of the water flow detection unit 104 on the protective electrode 103. That is, the touch button 102 and the water flow detection unit 104 do not contact each other. Optionally, the distance between the projection of the touch button 102 on the protective electrode 103 and the edge of the projection of the water flow detection unit 104 on the protective electrode 103 is greater than the second distance threshold. Thus, when the user's finger presses on the recognition area of ​​the touch button 102, it can prevent the water flow detection unit 104 from changing signals due to the presence of the finger, which would cause the touch chip 102 to shield the touch button 102 from triggering.

[0055] In this embodiment, each protective electrode 103 corresponds to a water flow detection unit 104. The touch chip 101 outputs a first driving signal to the water flow detection unit 104 corresponding to the first protective electrode 1031 and a second driving signal to the water flow detection unit 104 corresponding to the second protective electrode 1032. Due to the presence of the protective electrode 103 and the water flow detection unit 104, the touch button 102 will not be falsely triggered when the detection area of ​​the touch button 102 includes small water droplets. When the detection area of ​​the touch button 102 includes large water droplets or water flow, the water flow detection unit 104 can generate a water flow detection signal. The touch chip 101 can control the activation state of the touch button 102 surrounded by the water flow detection unit 104 according to the water flow detection signal. The touch button 102 can be shielded from triggering when there are large water droplets or water flow in the detection area of ​​the touch button 102, thus preventing the button from being falsely triggered due to the presence of water.

[0056] Figure 4 This is a schematic diagram of a touch device 100 including a water flow detection unit provided in an embodiment of this application, as shown below. Figure 4 As shown, the projection of the water flow detection unit 104 onto the protection electrode 103 is located within the edge of the protection electrode 103.

[0057] The water flow detection unit 104 can be located within and surrounded by the protection electrode 103. It should be understood that if the projection of the water flow detection unit 104 onto the protection electrode 103 is outside the edge of the protection electrode 103 (i.e., the water flow detection unit 104 extends beyond the protection electrode 103), when a small water droplet falls on the edge of the water flow detection unit 104, it may connect the water flow detection unit 104 to other structures on the circuit board, causing the water flow detection unit 104 to generate a water flow detection signal. This could result in the touch button 102 being blocked from triggering when a small water droplet that does not affect touch control is present. However, if... Figure 4 As shown in the structure, when a small water droplet falls on the edge of the water flow detection unit 104, it will connect the water flow detection unit 104 to the protection electrode 103. At this time, since the water flow detection unit 104 and the corresponding protection electrode 103 receive the same driving signal, the water flow detection unit 104 will not generate a water flow detection signal, and the touch button 102 can be triggered normally.

[0058] In this embodiment, the projection of the water flow detection unit 104 onto the protection electrode 103 is located within the edge of the protection electrode 103. This can prevent the touch button 102 from being shielded and triggered due to the connection between the water flow detection unit 104 and other structures on the circuit board caused by small water droplets, thereby meeting the user's need for wet-hand touch control.

[0059] In one possible implementation, the protection electrode 103 includes a first sub-electrode 1033 and a second sub-electrode 1034. The first sub-electrode 1033, the second sub-electrode 1034, and the water flow detection unit 104 are all sheet-like structures. The first sub-electrode 1033 and the second sub-electrode 1034 are stacked, and the water flow detection unit 104 is located between the first sub-electrode 1033 and the second sub-electrode 1034. The touch button 102 is stacked on the second sub-electrode 1034. The projection of the water flow detection unit 104 on the first sub-electrode 1033 is located within the edge of the first sub-electrode 1033, and the projection of the second sub-electrode 1034 on the water flow detection unit 104 is located within the edge of the water flow detection unit 104.

[0060] Figure 5 This is a schematic diagram of a stacked structure provided in an embodiment of this application, such as... Figure 5 As shown, for Figure 4 As shown in the structure, the protection electrode 103 and the water flow detection unit 104 can be stacked. Specifically, the protection electrode 103 may include a first sub-electrode 1033 and a second sub-electrode 1034. The first sub-electrode 1033, the second sub-electrode 1034, and the water flow detection unit 104 are all sheet-like structures. Following the direction from the protection electrode 103 to the touch button 102, the first sub-electrode 1033, the water flow detection unit 104, the second sub-electrode 1034, and the touch button 102 are stacked sequentially. The size of the water flow detection unit 104 is smaller than the size of the first sub-electrode 1033, and the size of the second sub-electrode 1034 is smaller than the size of the water flow detection unit 104, so that the stacked structure forms... Figure 4 The stack shown.

[0061] In this embodiment, the protective electrode 103 includes a first sub-electrode 1033 and a second sub-electrode 1034. The first sub-electrode 1033, the second sub-electrode 1034, and the water flow detection unit 104 are all sheet-like structures. The first sub-electrode 1033, the water flow detection unit 104, the second sub-electrode 1034, and the touch button 102 are stacked sequentially in the direction from the protective electrode 103 to the touch button 102. This allows the water flow detection unit 104 to be set in the touch device 100. The projection of the water flow detection unit 104 on the first sub-electrode 1033 is located within the edge of the first sub-electrode 1033, and the projection of the second sub-electrode 1034 on the water flow detection unit 104 is located within the edge of the water flow detection unit 104. This can prevent the touch button 102 from being blocked and triggered due to small water droplets, thus meeting the user's wet-hand touch requirements.

[0062] In one possible implementation, the water flow detection unit 104 is a ring-shaped sheet structure, the water flow detection unit 104 is stacked on the protective electrode 103, and the touch button 102 is located in the ring hole of the water flow detection unit 104.

[0063] The water flow detection unit 104 can also be a ring-shaped sheet structure, for example: Figure 4 The rectangular ring shown corresponds to, Figure 6 This is a schematic diagram of another stacking structure provided in an embodiment of this application, such as... Figure 6 As shown, the protective electrode 103, the water flow detection unit 104, and the touch button 102 are stacked sequentially in the direction from the protective electrode 103 to the touch button 102. The touch button 102 is located on the protective electrode 103 and inside the inner edge of the annular water flow detection unit 104, forming a shape as shown. Figure 4 The layered structure shown.

[0064] Optionally, the water flow detection unit 104 can be a ring-shaped sheet structure, and the protection electrode 103 can be a separate structure. The water flow detection unit 104 and the protection electrode 103 are located on the same plane. The first part of the protection electrode 103 is located outside the outer edge of the ring of the water flow detection unit 104 and is arranged around the water flow detection unit 104. The second part of the protection electrode 103 is located inside the inner edge of the ring of the water flow detection unit 104 and is arranged around the water flow detection unit 104. The touch button 102 is located inside the second part of the protection electrode 103. Optionally, the touch button 102 can be stacked inside the second part of the protection electrode 103, or the touch button 102 can be located on the same plane as the protection electrode 103, and the protection electrode 103 can be arranged around the touch button 102 (e.g.: Figure 10 The structure of the protective electrode 103 and the touch button 102 described herein).

[0065] It should be understood that Figure 5 and Figure 6 The stacked structure shown has an insulating layer between the different layers, which insulates the protection electrode 103, the water flow detection unit 104 and the touch button 102 from each other.

[0066] In this embodiment, the water flow detection unit 104 is an annular sheet structure, and the water flow detection unit 104 is stacked on the protective electrode 103. The touch button 102 is located in the annular hole of the water flow detection unit 104. This realizes the setting of the water flow detection unit 104 in the touch device 100, and the projection of the water flow detection unit 104 on the protective electrode 103 is located within the edge of the protective electrode 103, preventing the touch button 102 from being shielded and triggered due to small water droplets, thus meeting the user's wet-hand touch needs. Compared with the stacked solution of the aforementioned embodiment, since it is not necessary to set two sub-protective electrodes 103 and the water flow detection unit 104 is a hollow annular structure, it can save materials and reduce the cost of the touch device 100.

[0067] Figure 7 This is a schematic diagram of a touch device including a ground electrode provided in an embodiment of this application. Figure 8 This is a schematic diagram of a touch device including a ground electrode and a water flow detection unit provided in an embodiment of this application, as shown below. Figure 7 and Figure 8 As shown, the touch device 100 also includes a ground electrode 105, which is grounded. In the direction perpendicular to the ground electrode 105, the projection of the protection electrode 103 on the ground electrode 105 is located within the edge of the ground electrode 105, and the projections of different protection electrodes 103 on the ground electrode 105 do not intersect.

[0068] The touch device 100 also includes a ground electrode 105, which is grounded. In one example, the ground electrode 105 can be a metal trace on a circuit board, such as... Figure 7 In the illustrated scheme, when a small water droplet falls on the edge of the touch button 102, since the touch button 102 and the corresponding protection electrode 103 receive the same driving signal output by the touch chip 101, the touch button 102 will not generate a sensing signal and will not be triggered when the touch button 102 and the protection electrode 103 are connected by the water droplet. When a small water droplet falls between the protection electrode 103 and the ground electrode 105, the protection electrode 103 and the ground electrode 105 are connected through the water droplet. Since the signal change of the protection electrode 103 will not be detected, it will not affect the triggering of the touch button 102.

[0069] like Figure 8 In the illustrated scheme, when a small water droplet falls between the touch button 102 and the protection electrode 103, between the touch button 102 and the water flow detection unit 104, or between the water flow detection unit 104 and the protection electrode 103, the touch button 102 will not be triggered because it receives the same driving signal, and the water flow detection unit 104 will not generate a water flow detection signal. When a larger water droplet falls, the water flow detection unit 104 will be connected to the ground electrode 105 by the larger water droplet, or... Larger water droplets are connected to adjacent water flow detection units 104. Since the driving signals received by the adjacent water flow detection units 104 are inverted and the ground electrode 105 is grounded, at least a portion of the driving signals in the water flow detection units 104 are canceled out by the adjacent water flow detection units 104. Alternatively, at least a portion of the driving signals in the water flow detection units 104 flow to the ground line. The water flow detection units 104 generate water flow detection signals. The touch chip 101 can control the activation state of the touch button 102 surrounded by the water flow detection units 104, for example, by blocking the triggering of the touch button 102.

[0070] In this embodiment, the touch device 100 further includes a ground electrode 105, which surrounds the protection electrode 103 and is grounded. Since the ground electrode 105 is located around the multiple touch buttons 102 and the protection electrode 103, it can provide a ground signal to the touch device 100, which can shield the multiple touch buttons 102 from external interference. In addition, the ground electrode 105 can also release static electricity on the circuit board to the ground, thereby improving the electrostatic discharge (ESD) performance of the touch device 100.

[0071] In one possible implementation, the ground electrode 105 is a sheet electrode, and the protection electrode 103 is stacked on the ground electrode 105.

[0072] Figure 9 This is a schematic diagram of another stacking structure provided in the embodiments of this application, such as... Figure 9 As shown, the ground electrode 105 can be a sheet electrode. The ground electrode 105, the protection electrode 103, and the touch button 102 are stacked sequentially to form a structure as shown. Figure 7 The stacked structure shown may also include a water flow detection unit 104. The water flow detection unit 104 and the protection electrode 103 can be stacked according to the stacking structure in any of the above embodiments to form a structure as shown. Figure 8 The stacked structure shown.

[0073] In this embodiment, the ground electrode 105 is a sheet electrode, and the protection electrode 103 is stacked on the ground electrode 105. The ground electrode 105 is set inside the touch device 100, which can provide a ground signal to the touch device 100. Since the protection electrode 103 is stacked on the ground electrode 105 and the ground electrode 105 surrounds the protection electrode 103, the static electricity on the circuit board can be released to the ground through the ground electrode 105, which can improve the ESD performance of the touch device 100.

[0074] In one possible implementation, the ground electrode 105 has a ring structure, and the protection electrode 103 is located inside the ring hole of the ground electrode 105.

[0075] Figure 10 This is a schematic diagram of another stacking structure provided in the embodiments of this application, such as... Figure 10 As shown, the ground electrode 105 and the protective electrode 103 can be located on the same plane. Specifically, the ground electrode 105 has a ring-shaped structure, and the protective electrode 103 is located inside the inner edge of the ring-shaped structure, forming a ring-shaped structure. Figure 7The stacked structure shown may further include a water flow detection unit 104. The water flow detection unit 104 and the protection electrode 103 may be stacked according to the stacked structure in any of the above embodiments to form a structure as shown. Figure 8 The stacked structure is shown. It should also be noted that when the ground electrode 105 is a ring structure, the inner edge of the ground electrode 105 may not be in contact with the protection electrode 103, that is, the protection electrode 103 is located inside the ring hole and does not contact the ground electrode 105.

[0076] In this embodiment, the ground electrode 105 has a ring structure, and the protection electrode 103 is located inside the ring hole of the ground electrode 105. This allows the ground electrode 105 to use less material while still fulfilling its function, thereby reducing the production cost of the touch device 100.

[0077] This application embodiment also provides a touch chip, which is electrically connected to a plurality of touch buttons and at least two protection electrodes respectively; wherein, the plurality of touch buttons include a first touch button and a second touch button, and the at least two protection electrodes include a first protection electrode and a second protection electrode, the projection of the first touch button on the first protection electrode is located within the edge of the first protection electrode, and the projection of the second touch button on the second protection electrode is located within the edge of the second protection electrode; the touch chip is used to output a first driving signal to the first touch button and the first protection electrode, and to output a second driving signal to the second touch button and the second protection electrode, the first driving signal and the second driving signal being out of phase, and to perform touch detection based on the sensing signal generated by the touch button.

[0078] In this embodiment, the touch chip can be the touch chip 101 in any of the foregoing embodiments, the protection electrode can be the protection electrode 103 in any of the foregoing embodiments, and the touch button can be the touch button 102 in any of the foregoing embodiments. All of these can be the structures in any of the foregoing embodiments, and will not be described again here.

[0079] Figure 11 This is a schematic diagram of an in-vehicle touch screen device provided in an embodiment of this application, such as... Figure 11 As shown, the in-vehicle touch device 200 includes the touch device 100 in any of the aforementioned embodiments.

[0080] In this embodiment, the touch device 100 included in the vehicle touch device 200 can be the touch device 100 in any of the foregoing embodiments, and can be the structure in any of the foregoing embodiments, which will not be described again here.

[0081] It should be noted that, depending on the implementation needs, the various components / steps described in the embodiments of this application can be broken down into more components / steps, or two or more components / steps or parts of the operation of components / steps can be combined into new components / steps to achieve the purpose of the embodiments of this application.

[0082] Those skilled in the art will recognize that the units and method steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments of this application.

[0083] The above embodiments are only used to illustrate the embodiments of this application, and are not intended to limit the embodiments of this application. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of this application. Therefore, all equivalent technical solutions also fall within the scope of the embodiments of this application, and the patent protection scope of the embodiments of this application should be defined by the claims.

Claims

1. A touch device, comprising: The touch control device comprises: a touch chip, a plurality of touch keys and at least two protection electrodes; the touch chip is electrically connected with the touch keys and the protection electrodes respectively; the plurality of touch keys comprises a first touch key and a second touch key, and the at least two protection electrodes comprises a first protection electrode and a second protection electrode, the projection of the first touch key on the first protection electrode is located within the edge of the first protection electrode, and the projection of the second touch key on the second protection electrode is located within the edge of the second protection electrode; the touch chip is configured to output a first driving signal to the first touch key and the first protection electrode, and output a second driving signal to the second touch key and the second protection electrode, the first driving signal and the second driving signal are opposite, and the touch control is detected based on the sensing signal generated by the touch key.

2. The touch control device according to claim 1, wherein: the plurality of touch keys comprises at least one first key group and at least one second key group, the first key group comprises a plurality of first touch keys arranged adjacently, the second key group comprises a plurality of second touch keys arranged adjacently, and the first key group is arranged adjacently with the second key group. 3.The touch device of claim 1, wherein, The touch control device further comprises at least two water flow detection units, each of the protection electrodes corresponds to one of the water flow detection units, and different protection electrodes correspond to different water flow detection units; the water flow detection unit is electrically connected with the touch chip; for any one of the protection electrodes, the projection of the touch key on the protection electrode is located within the edge of the projection of the water flow detection unit on the protection electrode, and does not intersect with the projection of the water flow detection unit on the protection electrode; the touch chip is configured to output the first driving signal to the water flow detection unit corresponding to the first protection electrode, and output the second driving signal to the water flow detection unit corresponding to the second protection electrode, and control the activation state of the touch key surrounded by the water flow detection unit according to the water flow detection signal output by the water flow detection unit. 4.The touch device of claim 3, wherein, The projection of the water flow detection unit on the protection electrode is located within the edge of the protection electrode. 5.The touch device of claim 4, wherein, The protection electrode comprises a first sub-electrode and a second sub-electrode, the first sub-electrode, the second sub-electrode and the water flow detection unit are all in a sheet structure; the first sub-electrode and the second sub-electrode are stacked, and the water flow detection unit is located between the first sub-electrode and the second sub-electrode; the touch key is stacked on the second sub-electrode; the projection of the water flow detection unit on the first sub-electrode is located within the edge of the first sub-electrode; the projection of the second sub-electrode on the water flow detection unit is located within the edge of the water flow detection unit. 6.The touch device of claim 4, wherein, The water flow detection unit is in a ring-shaped sheet structure; the water flow detection unit is stacked on the protection electrode, and the touch key is located within the ring hole of the water flow detection unit. 7.The touch device according to any one of claims 1-6, characterized in that, The touch control device further comprises a ground electrode; the ground electrode is grounded; In a direction perpendicular to the ground electrode, a projection of the protection electrode on the ground electrode is located within an edge of the ground electrode, and projections of different protection electrodes on the ground electrode do not intersect. 8.The touch device of claim 7, wherein, The ground electrode is a sheet electrode, and the protection electrodes are stacked on the ground electrode. 9.The touch device of claim 7, wherein, The ground electrode is a ring structure, and the protection electrodes are located within a ring hole of the ground electrode.

10. A touch chip, characterized in that, The touch chip is electrically connected with a plurality of touch keys and at least two protection electrodes respectively; wherein the plurality of touch keys comprise a first touch key and a second touch key, and the at least two protection electrodes comprise a first protection electrode and a second protection electrode, a projection of the first touch key on the first protection electrode is located within an edge of the first protection electrode, and a projection of the second touch key on the second protection electrode is located within an edge of the second protection electrode; The touch chip is configured to output a first driving signal to the first touch key and the first protection electrode, and output a second driving signal to the second touch key and the second protection electrode, the first driving signal and the second driving signal are opposite, and touch detection is performed based on an induced signal generated by the touch key.

11. A vehicle-mounted touch control device, characterized in that, Comprising: The touch device according to any one of claims 1-9.

Images