Touch device and touch signal detection method

Abstract

This application relates to a touch device and a touch signal detection method. The touch device includes a processor and a touch sensor; the touch sensor includes 2N electrodes arranged in two rows, with each row having the same number of electrodes; two electrodes in adjacent columns located diagonally are connected to each other to form an emitter and a receiver; the emitter and receiver are respectively connected to the processor; the processor generates a first coding signal and a second coding signal in a first stage and a second stage, respectively, inputs them to the emitter, and detects the output signal of the receiver in different stages to obtain the first touch signal quantity and the second touch signal quantity, thereby enabling the determination of the trigger source of the touch signal acting on the touch sensor based on the first touch signal quantity and the second touch signal quantity. Using this touch device, the trigger source of the touch signal can be accurately determined based on a touch sensor with a specific structure.

Description

Technical Field

[0001] This application relates to the field of touch recognition technology, and in particular to a touch device and a touch signal detection method. Background Technology

[0002] Capacitive touch buttons, which detect changes in the capacitance of electrodes to determine if a finger is touching the screen, have become a common user interaction device. Compared to traditional mechanical buttons, capacitive touch buttons offer numerous advantages, including a more attractive appearance, lower cost, lower power consumption, and longer lifespan, leading to a continuous increase in their application demand.

[0003] However, during the use of capacitive touch buttons, if there are conductive liquids such as water droplets above the capacitive touch buttons, these conductive liquids will also change the capacitance of the electrodes. Obviously, if there is conductive liquid above the capacitive touch buttons, and it is not possible to accurately determine whether the trigger source of the touch signal is the conductive liquid or the human body, the capacitive touch buttons will experience accidental touches. Summary of the Invention

[0004] Therefore, it is necessary to provide a touch device and a touch signal detection method that can accurately determine the trigger source of a touch signal.

[0005] In a first aspect, this application provides a touch device. The touch device includes a processor and a touch sensor; the touch sensor includes 2N electrodes arranged in two rows, with the same number of electrodes in each row; two electrodes in adjacent columns located diagonally are connected to each other to form an emitter and a receiver; the emitter and the receiver are respectively connected to the processor; N is an integer greater than 1;

[0006] The processor is configured to generate a first coding signal in a first stage, input the first coding signal to the emitter, and detect a first output signal of the receiver to obtain a first touch signal quantity.

[0007] The processor is also configured to generate a second coding signal in the second stage, input the second coding signal to the emitter, and detect the second output signal of the receiver to obtain a second touch signal quantity; the first stage and the second stage belong to different stages of the detection cycle of the touch sensor; the frequency of the first coding signal is different from the frequency of the second coding signal;

[0008] The processor is also used to determine the trigger source of the touch signal acting on the touch sensor based on the first touch signal quantity and the second touch signal quantity.

[0009] Secondly, this application provides a touch signal detection method applied in a touch device, the touch device including a touch sensor; the touch sensor includes 2N electrodes, the 2N electrodes are arranged in two rows, each row having the same number of electrodes; two electrodes in adjacent columns located diagonally are connected to each other to form an emitter and a receiver; N is an integer greater than 1. The method includes:

[0010] In the first stage, a first coding signal is generated and input to the transmitter, and a first output signal of the receiver is detected to obtain a first touch signal quantity.

[0011] In the second stage, a second coding signal is generated and input to the emitter, and the second output signal of the receiver is detected to obtain the second touch signal quantity; the first stage and the second stage belong to different stages of the detection cycle of the touch sensor; the frequency of the first coding signal is different from the frequency of the second coding signal;

[0012] Based on the first touch signal quantity and the second touch signal quantity, the trigger source of the touch signal acting on the touch sensor is determined.

[0013] The aforementioned touch device and touch signal detection method include a processor and a touch sensor. In the 2N electrodes of the touch sensor, two electrodes in adjacent columns located diagonally are connected to each other to form an emitter and a receiver. The processor generates a first coding signal and a second coding signal in a first stage and a second stage, respectively, and inputs them to the emitter. It also detects the output signal of the receiver in different stages to obtain the first touch signal quantity and the second touch signal quantity. Based on this, since the touch sensor has a specific structure, the first touch signal quantity and the second touch signal quantity are both mutual capacitance signals between the emitter and the receiver. Therefore, different mutual capacitance signal quantities correspond to different electrical characteristics of different trigger sources. Thus, the touch device can determine the trigger source of the touch signal acting on the touch sensor based on the first touch signal quantity and the second touch signal quantity. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of a touch device provided in an embodiment of this application;

[0016] Figure 2 This is a schematic diagram comparing the touch signal quantity of a high-frequency coding signal and a low-frequency coding signal under a trigger source, as provided in an embodiment of this application.

[0017] Figure 3 This is a schematic diagram comparing the touch signal quantity of a high-frequency coding signal and a low-frequency coding signal under another trigger source provided in this application embodiment;

[0018] Figure 4 This is a schematic diagram comparing the touch signal quantity of a high-frequency coding signal and a low-frequency coding signal under another trigger source provided in this application embodiment;

[0019] Figure 5 This is a flowchart illustrating a touch signal detection method provided in an embodiment of this application. Detailed Implementation

[0020] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be more thorough and complete.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0022] It is understood that the terms "first," "second," etc., used in this application may be used herein to describe various objects, but these objects are not limited by these terms. These terms are only used to distinguish one object from another. For example, without departing from the scope of this application, a first touch signal may be referred to as a second touch signal, and similarly, a second touch signal may be referred to as a first touch signal. Both the first touch signal and the second touch signal are touch signals, but they are not the same touch signal.

[0023] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0024] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0025] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0026] This application was made by the inventor based on his understanding and research into the following issues:

[0027] During the use of capacitive touch buttons, if conductive liquids such as water droplets are present above the button, these liquids will alter the capacitance of the electrodes. Currently, most capacitive touch buttons detect touch signals by operating the electrodes in a single self-capacitance mode. Whether covered by a finger or conductive liquid, the self-capacitance signal of the capacitive touch button in single self-capacitance mode will increase.

[0028] Obviously, current capacitive touch buttons cannot accurately distinguish whether the trigger source of the touch signal is a human body or a conductive liquid based on changes in signal quantity. Therefore, the presence of conductive liquid above the capacitive touch button can easily lead to accidental touches. Based on this, this application proposes a touch device that enables electrodes to perform touch signal detection in mutual capacitance mode.

[0029] like Figure 1 As shown, a touch device in one embodiment includes a processor 102 and a touch sensor 104; the touch sensor 104 includes 2N electrodes 1042, which are arranged in two rows, with the same number of electrodes 1042 in each row; two electrodes 1042 in adjacent columns of electrodes 1042 located diagonally are connected to each other to form an emitter 106 and a receiver 108; the emitter 106 and the receiver 108 are respectively connected to the processor 102; N is an integer greater than 1.

[0030] The processor 102 is configured to generate a first coding signal in a first stage, input the first coding signal to the emitter 106, and detect the first output signal of the receiver 108 to obtain a first touch signal quantity.

[0031] The processor 102 is also configured to generate a second coding signal in the second stage and input the second coding signal to the emitter 106, and detect the second output signal of the receiver 108 to obtain a second touch signal quantity; the first stage and the second stage belong to different stages of the detection cycle of the touch sensor 104; the frequency of the first coding signal is different from the frequency of the second coding signal.

[0032] The processor 102 is also configured to determine the trigger source of the touch signal acting on the touch sensor 104 based on the first touch signal quantity and the second touch signal quantity.

[0033] Touch devices, in this context, refer to electronic devices capable of detecting changes in touch signal quantity when a human body or conductive object touches or approaches its surface, and converting these changes from electrical signals into digital signals for interactive input. Specifically, the changes in touch signal quantity refer to changes in capacitance.

[0034] Touch sensor 104 refers to a device in a touch device used to detect changes in touch signal quantity when a human body or conductive object touches or approaches its surface, and to feed back the changes in touch signal quantity to the processor 102 in the touch device. In other words, touch sensor 104 is a key device in a touch device for sensing touch signals. Optionally, the touch sensor can be a quadrilateral sensor.

[0035] A touch signal refers to the change in capacitance caused by a touch operation, and the change in capacitance can be processed by the processor 102 and represented as an electrical signal of a touch event.

[0036] Electrode 1042 refers to a conductive component in a touch device used to generate changes in the amount of touch signal under the action of coding signals and touch signals.

[0037] Optionally, electrode 1042 may be made of indium tin oxide, graphene, copper or other conductive materials.

[0038] Two electrodes 1042 located diagonally in two adjacent columns of electrodes 1042 refer to two electrodes 1042 that are not located in the same row or column.

[0039] Since the emitter 106 and the receiver 108 are formed by connecting two electrodes 1042 located diagonally in two adjacent columns of electrodes 1042, the emitter 106 includes N electrodes out of 2N electrodes and the receiver 108 includes the other N electrodes out of 2N electrodes.

[0040] Specifically, the touch sensor 104 is configured with an emitter 106 and a receiver 108 to generate a first touch signal and a second touch signal, which are presented as mutually compliant signals, based on the first coding signal and the touch signal, and the second coding signal and the touch signal, respectively. The two electrodes 1042 in the adjacent columns of electrodes 1042 are connected to each other in order to ensure that the touch signal of the human body can cover both the emitter 106 and the receiver 108 at the same time, regardless of where the touch signal of the human body covers the touch sensor 104. This avoids the situation where the emitter 106 and the receiver 108 cannot be covered at the same time, which would prevent the generation of mutually compliant signals and make it impossible to distinguish the trigger source of the touch signal.

[0041] Processor 102 refers to a device in a touch device used to configure the operating mode of touch sensor 104, detect changes in touch signal quantity from touch sensor 104, and convert the changes in touch signal quantity, which are presented as electrical signals, into touch signal quantity, which are presented as digital signals.

[0042] Alternatively, the processor 102 may be a capacitance acquisition chip.

[0043] The first coding signal refers to the encoded electrical signal (exemplarily, a pulse sequence, a sine wave, etc.) of the first frequency input by the processor 102 to the emitter 106, which is used to form an excitation electric field in the touch sensor 104, so that the receiver 108 can detect the change in mutual capacitance between the emitter 106 and the receiver 108 based on the excitation electric field and the touch signal to obtain a first output signal, thereby enabling the processor 102 to detect the first output signal of the receiver 108 to obtain a first touch signal quantity.

[0044] The second coding signal refers to the second frequency encoded electrical signal (exemplarily, a pulse sequence, a sine wave, etc.) input by the processor 102 to the emitter 106, which is used to form an excitation electric field in the touch sensor 104, so that the receiver 108 can detect the change in mutual capacitance between the emitter 106 and the receiver 108 based on the excitation electric field and the touch signal to obtain a second output signal, thereby enabling the processor 102 to detect the second output signal of the receiver 108 to obtain a second touch signal quantity.

[0045] The first touch signal and the second touch signal are respectively the result of all the mutual capacitance signals generated by the N electrodes in the emitter and the N electrodes in the receiver of the entire touch sensor. That is to say, the first touch signal and the second touch signal correspond to the entire touch sensor.

[0046] In one exemplary embodiment, the first touch signal quantity and the second touch signal quantity are both greater than 0.

[0047] Specifically, in the touch sensor 104, two electrodes 1042 located diagonally in two adjacent columns of electrodes 1042 are connected to each other to form an emitter 106 and a receiver 108. The emitter 106 and the receiver 108 are respectively connected to the processor 102. Thus, under the action of the first coding signal and the second coding signal input to the emitter 106 by the processor 102, the first touch signal quantity and the second touch signal quantity detected by the processor 102 from the receiver 108 are respectively the mutual capacitance signal quantity between the emitter 106 and the receiver 108 in the first stage and the mutual capacitance signal quantity in the second stage.

[0048] It should be noted that although the first touch signal and the second touch signal each include the self-capacitive signal of 2N electrodes 1042, the emitter 106 and receiver 108 in the touch sensor 104 are operating in mutual capacitance mode under the action of the first and second coding signals. Therefore, the first touch signal and the second touch signal obtained at this time are basically dominated by the mutual capacitance signal. Thus, the self-capacitive signal of 2N electrodes 1042 in the first touch signal and the second touch signal can be ignored. That is to say, the first touch signal and the second touch signal can be regarded as the mutual capacitance signal between the emitter 106 and the receiver 108 in the first stage and the mutual capacitance signal in the second stage, respectively.

[0049] The detection cycle refers to the time required for the touch sensor 104 to periodically detect the capacitance values ​​of 2N electrodes 1042 at fixed intervals. A shorter detection cycle results in a faster determination of the trigger source of the touch signal by the touch device; conversely, a longer detection cycle results in a slower determination of the trigger source. Therefore, there is a negative correlation between the length of the detection cycle and the speed at which the touch device determines the trigger source of the touch signal.

[0050] Optionally, the detection period can be 20ms, 30ms, 50ms or other times.

[0051] Optionally, the duration of the first phase and the duration of the second phase can be the same or different.

[0052] The trigger source of the touch signal refers to the physical factor that causes the capacitance change of the 2N electrodes 1042 of the touch sensor 104, i.e., the source of the touch signal.

[0053] Optionally, the trigger source for the touch signal may include the human body or a conductive liquid. Optionally, the human body may be a human finger. Optionally, the conductive liquid may be water, an electrolyte solution, or other conductive liquid.

[0054] Specifically, since the frequencies of the first and second coding signals are different, and the capacitance of electrode 1042 responds differently to coding signals of different frequencies, the capacitance changes of high-frequency and low-frequency coding signals also differ. Consequently, the first touch signal quantity corresponding to the first coding signal and the second touch signal quantity corresponding to the second coding signal are also different. Furthermore, since different triggering sources of touch signals inherently possess different electrical characteristics, the processor 102 can accurately determine the triggering source of the touch signal based on the difference between the first and second touch signal quantities.

[0055] Optionally, after the processor 102 determines the trigger source of the touch signal acting on the touch sensor 104, the processor 102 can also determine whether to respond to the touch signal based on the trigger source. For example, if the trigger source of the touch signal includes a human body, the touch signal is responded to; otherwise, if the trigger source of the touch signal is a conductive liquid, the touch signal is not responded to to avoid accidental touches.

[0056] In an exemplary embodiment, after the processor 102 generates a first coding signal in the first stage and inputs the first coding signal to the emitter 106, the touch sensor 104 is used to detect the amount of capacitance change caused by the touch signal through the receiver 108 based on the first coding signal, and obtain the first output signal of the receiver 108, so that the processor 102 detects the first output signal of the receiver 108 to obtain the first touch signal amount.

[0057] In an exemplary embodiment, after the processor 102 generates a second coding signal in the second stage and inputs the second coding signal to the emitter 106, the touch sensor 104 is used to detect the amount of capacitance change caused by the touch signal through the receiver 108 based on the second coding signal, and obtains a second output signal of the receiver 108, so that the processor 102 detects the second output signal of the receiver 108 to obtain the second touch signal amount.

[0058] The aforementioned touch device includes a processor and a touch sensor. In the 2N electrodes of the touch sensor, two electrodes in adjacent columns located diagonally are connected to each other to form an emitter and a receiver. The processor generates a first coding signal and a second coding signal in a first stage and a second stage, respectively, and inputs them to the emitter. The processor also detects the output signal of the receiver in different stages to obtain the first touch signal quantity and the second touch signal quantity, respectively. Based on this, since the touch sensor has a specific structure, the first touch signal quantity and the second touch signal quantity are both mutual capacitance signal quantities between the emitter and the receiver. Thus, since different trigger sources have different electrical characteristics, there are different mutual capacitance signal quantity situations. Therefore, the touch device can determine the trigger source of the touch signal acting on the touch sensor based on the first touch signal quantity and the second touch signal quantity.

[0059] In one exemplary embodiment, the area of ​​the electrode is less than or equal to a preset area.

[0060] The preset area can be 55mm². 2 60mm 2 65mm 2 Or other area size.

[0061] In this embodiment, the processor determines the trigger source of the touch signal based on the different mutual capacitance signal quantities between the emitter and receiver in the first and second stages. Since there is a positive correlation between the area of ​​the electrode and the amount of self-capacitance signal, that is, if the area of ​​the electrode is larger, the amount of self-capacitance signal generated by the electrode will also be larger. Therefore, in order to avoid the self-capacitance signal quantity causing adverse interference to the processor's process of determining the trigger source of the touch signal, the preset area should be a small area size to minimize the influence of the self-capacitance signal quantity of the electrode.

[0062] In this embodiment, the area of ​​the electrodes is small, thereby reducing the amount of self-capacitive signal generated by the 2N electrodes. This avoids the processor being affected by the large amount of self-capacitive signal from the 2N electrodes when determining the trigger source of the touch signal through the mutual capacitance signal between the emitter and receiver, which could lead to inaccurate determination of the trigger source. Consequently, it ensures that the touch device can accurately determine the trigger source of the touch signal based on the first touch signal and the second touch signal.

[0063] In one exemplary embodiment, the frequency of the first coding signal is greater than the frequency of the second coding signal.

[0064] The processor is configured to determine that the trigger source of the touch signal acting on the touch sensor includes a human body when the first touch signal quantity is greater than the second touch signal quantity; and to determine that the trigger source of the touch signal acting on the touch sensor is a conductive liquid when the first touch signal quantity is less than the second touch signal quantity.

[0065] The trigger source for the touch signal includes a human body and may also include a conductive liquid. When the frequency of the first coding signal is greater than the frequency of the second coding signal, the trigger source for the touch signal, whether it consists only of a human body or includes both a human body and a conductive liquid, will have a first touch signal quantity greater than a second touch signal quantity. Therefore, in this case, it is sufficient to determine that the trigger source for the touch signal must include a human body if it can be confirmed that the first touch signal quantity is greater than the second touch signal quantity.

[0066] Specifically, when the frequency of the first coding signal is greater than the frequency of the second coding signal, the emitter and receiver of the touch sensor operate in high-frequency coding mutual capacitance mode in the first stage and in low-frequency coding mutual capacitance mode in the second stage.

[0067] Specifically, since both the human body and conductive liquids are conductive, the amount of mutual capacitance signal generated when the trigger source of the touch signal includes both the human body and the conductive liquid will be greater than the amount of mutual capacitance signal generated when only the human body is present.

[0068] For example, using time nodes on the time axis as the horizontal axis and touch signal quantity as the vertical axis, in the case of a touch device employing a touch sensor with a specific structure provided in the embodiments of this application, such as... Figure 2 As shown, when the only trigger source is the human touch signal acting on the touch sensor, the amount of touch signal obtained based on the higher frequency coding signal is greater than the amount of touch signal obtained based on the lower frequency coding signal; for example... Figure 3 As shown, when the touch sensor is triggered only by a conductive liquid, the amount of touch signal obtained based on the higher-frequency coding signal is less than the amount of touch signal obtained based on the lower-frequency coding signal; for example... Figure 4 As shown, during the continuous action of the conductive liquid on the touch sensor, when a human body and the conductive liquid suddenly act simultaneously on the touch sensor, the touch signal quantity obtained based on the higher-frequency coding signal is greater than the touch signal quantity obtained based on the lower-frequency coding signal. Therefore, due to the different electrical properties of the human body and the conductive liquid, and considering that different mutual capacitance signal quantities can be obtained based on coding signals of different frequencies by combining the emitter and receiver, the touch device provided in this application, including a touch sensor with a specific structure, can determine the trigger source of the touch signal acting on the touch sensor based on a first touch signal quantity and a second touch signal quantity.

[0069] In one exemplary embodiment, the frequency of the first coding signal is greater than or equal to 200 kHz, and the frequency of the second coding signal is less than 50 kHz.

[0070] In this embodiment, since the conductivity of the human body is stronger than that of conductive liquids, and since a higher frequency coding signal corresponds to a larger amount of mutual capacitance signal, when the frequency of the first coding signal is greater than the frequency of the second coding signal, the processor can determine that the trigger source of the touch signal includes the human body when the first touch signal amount is greater than the second touch signal amount. Conversely, when the first touch signal amount is less than the second touch signal amount, the processor determines that the trigger source of the touch signal is a conductive liquid. Thus, the touch device can accurately determine the trigger source of the touch signal based on the first touch signal amount and the second touch signal amount.

[0071] In an exemplary embodiment, the processor is configured to determine that the trigger source of the touch signal acting on the touch sensor includes a human body when the first touch signal quantity is greater than the second touch signal quantity and the absolute value of the difference between the first touch signal quantity and the second touch signal quantity is greater than or equal to a preset threshold; and to determine that the trigger source of the touch signal acting on the touch sensor is a conductive liquid when the first touch signal quantity is less than the second touch signal quantity and the absolute value of the difference between the first touch signal quantity and the second touch signal quantity is greater than or equal to a preset threshold.

[0072] The preset threshold can be pre-set in the processor. The preset threshold is related to the processor's configuration parameters for the touch sensor. For example, if the touch sensor configuration will have a large amount of touch signal, the preset threshold should also be set to a larger threshold.

[0073] The first and second stages of the processor are interchangeable. During the interchange, it is necessary to ensure that the frequencies corresponding to the first and second coding signals are also interchanged accordingly. Therefore, in an exemplary embodiment, the frequency of the first coding signal is less than the frequency of the second coding signal. The processor is used to determine that the trigger source of the touch signal is a conductive liquid when the first touch signal amount is less than the second touch signal amount; and to determine that the trigger source of the touch signal includes a human body when the first touch signal amount is greater than the second touch signal amount.

[0074] In cases where the frequency of the first coding signal is less than the frequency of the second coding signal, the trigger source of the touch signal, whether it is only a human body or includes both a human body and a conductive liquid, will result in a lower first touch signal quantity than the second touch signal quantity.

[0075] In one exemplary embodiment, the electrode is rectangular in shape, and the aspect ratio between the length and width of the electrode is 1.5 to 1.7.

[0076] Optionally, the length of the electrode can be 9 mm to 10 mm, and the width of the electrode can be 5.5 mm to 6.5 mm, as long as the aspect ratio between the length and width of the electrode is 1.5 to 1.7.

[0077] In one exemplary embodiment, such as Figure 1 As shown, the first spacing D1 of two adjacent columns of electrodes is the same, and the ratio of the first spacing D1 to the length of the electrode is 0.1 to 0.2; the second spacing D2 of two adjacent rows of electrodes is the same, and the ratio of the second spacing D2 to the width of the electrode is 0.2 to 0.3.

[0078] Wherein, the first spacing D1 between two adjacent columns of electrodes refers to the straight-line distance between the same row of electrodes in the row direction; the second spacing D2 between two adjacent rows of electrodes refers to the straight-line distance between the same column of electrodes in the column direction.

[0079] The size of the first spacing D1 and the size of the second spacing D2 can be the same or different.

[0080] In one exemplary embodiment, N is 2.

[0081] In the case of N=2, the touch sensor includes 4 electrodes, which form a 2*2 electrode array.

[0082] Alternatively, N can also be 3, 4, 6 or other numbers.

[0083] It is understood that the above-mentioned touch device can also take other forms, not limited to the forms mentioned in the above embodiments, as long as it can achieve the function of accurately determining the trigger source of the touch signal.

[0084] The aforementioned touch devices can be various personal computers, laptops, smartphones, tablets, IoT devices, portable wearable devices, gaming devices, or other devices with touch functionality.

[0085] Based on the same inventive concept, this application also provides a touch signal detection method, applied in a touch device, the touch device including a touch sensor; the touch sensor includes 2N electrodes, the 2N electrodes are arranged in two rows, each row having the same number of electrodes; two electrodes in adjacent columns located diagonally are connected to each other to form an emitter and a receiver; N is an integer greater than 1; as shown... Figure 5 As shown, the method includes the following steps 502 to 506:

[0086] 502, in the first stage, a first coding signal is generated and input to the transmitter, and the first output signal of the receiver is detected to obtain the first touch signal quantity.

[0087] 504, in the second stage, a second coding signal is generated and input to the emitter, and the second output signal of the receiver is detected to obtain the second touch signal quantity; the first stage and the second stage belong to different stages of the detection cycle of the touch sensor; the frequency of the first coding signal is different from the frequency of the second coding signal.

[0088] 506. Based on the first touch signal quantity and the second touch signal quantity, determine the trigger source of the touch signal acting on the touch sensor.

[0089] The aforementioned touch signal detection method is applied to a touch device including a touch sensor. In the 2N electrodes of the touch sensor, two electrodes in adjacent columns located diagonally are connected to each other to form an emitter and a receiver. The method can generate a first coding signal and a second coding signal in a first stage and a second stage, respectively, which are input to the emitter and the output signal of the receiver is detected in different stages to obtain the first touch signal quantity and the second touch signal quantity. Based on this, since the touch sensor has a specific structure, the first touch signal quantity and the second touch signal quantity are both mutual capacitance signal quantities between the emitter and the receiver. Therefore, since different trigger sources correspond to different mutual capacitance signal quantity situations, the touch device can determine the trigger source of the touch signal acting on the touch sensor based on the first touch signal quantity and the second touch signal quantity.

[0090] It should be noted that the solution provided by the touch signal detection method is similar to the solution described in the above-mentioned touch device. Therefore, the specific limitations of the one or more touch signal detection method embodiments provided above can be found in the limitations of the touch device above, and will not be repeated here.

[0091] In one exemplary embodiment, the frequency of the first coding signal is greater than the frequency of the second coding signal.

[0092] The above-mentioned determination of the trigger source of the touch signal acting on the touch sensor based on the first touch signal quantity and the second touch signal quantity includes:

[0093] If the first touch signal quantity is greater than the second touch signal quantity, it is determined that the trigger source of the touch signal acting on the touch sensor includes the human body.

[0094] If the first touch signal quantity is less than the second touch signal quantity, the trigger source of the touch signal acting on the touch sensor is determined to be a conductive liquid.

[0095] In an exemplary embodiment, when the first touch signal quantity is greater than the second touch signal quantity, determining that the trigger source of the touch signal acting on the touch sensor includes a human body includes:

[0096] If the first touch signal quantity is greater than the second touch signal quantity, and the absolute value of the difference between the first touch signal quantity and the second touch signal quantity is greater than or equal to a preset threshold, it is determined that the trigger source of the touch signal acting on the touch sensor includes the human body.

[0097] The above-mentioned determination that the trigger source of the touch signal acting on the touch sensor is a conductive liquid when the first touch signal quantity is less than the second touch signal quantity includes:

[0098] If the first touch signal quantity is less than the second touch signal quantity, and the absolute value of the difference between the first touch signal quantity and the second touch signal quantity is greater than or equal to a preset threshold, the trigger source of the touch signal acting on the touch sensor is determined to be a conductive liquid.

[0099] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0100] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A touch device, characterized in that, The system includes a processor and a touch sensor; the touch sensor includes 2N electrodes arranged in two rows, with each row having the same number of electrodes; two electrodes in adjacent columns located diagonally are connected to each other to form an emitter and a receiver; the emitter and the receiver are respectively connected to the processor; N is an integer greater than 1. The processor is configured to generate a first coding signal in a first stage, input the first coding signal to the emitter, and detect a first output signal of the receiver to obtain a first touch signal quantity. The processor is further configured to generate a second coding signal in the second stage, input the second coding signal to the emitter, and detect the second output signal of the receiver to obtain a second touch signal quantity; the first stage and the second stage belong to different stages of the detection cycle of the touch sensor; the frequency of the first coding signal is greater than the frequency of the second coding signal; The processor is further configured to determine that the trigger source of the touch signal acting on the touch sensor includes a human body when the first touch signal quantity is greater than the second touch signal quantity and the absolute value of the difference between the first touch signal quantity and the second touch signal quantity is greater than or equal to a preset threshold; and to determine that the trigger source of the touch signal acting on the touch sensor is a conductive liquid when the first touch signal quantity is less than the second touch signal quantity and the absolute value of the difference between the first touch signal quantity and the second touch signal quantity is greater than or equal to a preset threshold.

2. The device according to claim 1, characterized in that, The area of ​​the electrode is less than or equal to a preset area.

3. The device according to claim 1, characterized in that, The electrode is rectangular in shape, and the aspect ratio between its length and width is 1.5 to 1.

7.

4. The device according to claim 1, characterized in that, The first spacing between two adjacent columns of electrodes is the same, and the ratio of the first spacing to the length of the electrode is 0.1 to 0.2; the second spacing between two adjacent rows of electrodes is the same, and the ratio of the second spacing to the width of the electrode is 0.2 to 0.

3.

5. The device according to claim 1, characterized in that, The value of N is 2.

6. The device according to claim 2, characterized in that, The preset area is 55mm² 2 60mm 2 65mm 2 At least one of them.

7. The device according to claim 1, characterized in that, The detection period is one of 20ms, 30ms, and 50ms.

8. A touch signal detection method, characterized in that, The touch sensor is used in a touch device. The touch sensor includes 2N electrodes arranged in two rows, with the same number of electrodes in each row. Two electrodes in two adjacent columns are connected to each other in the diagonal direction to form an emitter and a receiver. N is an integer greater than 1; the method includes: In the first stage, a first coding signal is generated and input to the emitter, and a first output signal of the receiver is detected to obtain a first touch signal quantity. In the second stage, a second coding signal is generated and input to the emitter, and a second output signal of the receiver is detected to obtain a second touch signal quantity; the first stage and the second stage belong to different stages of the detection cycle of the touch sensor; the frequency of the first coding signal is greater than the frequency of the second coding signal; If the first touch signal quantity is greater than the second touch signal quantity, and the absolute value of the difference between the first touch signal quantity and the second touch signal quantity is greater than or equal to a preset threshold, the trigger source of the touch signal acting on the touch sensor is determined to be a human body; if the first touch signal quantity is less than the second touch signal quantity, and the absolute value of the difference between the first touch signal quantity and the second touch signal quantity is greater than or equal to a preset threshold, the trigger source of the touch signal acting on the touch sensor is determined to be a conductive liquid.

9. The method according to claim 8, characterized in that, The first touch signal quantity and the second touch signal quantity are both greater than 0.

10. The method according to claim 8, characterized in that, The frequency of the first coding signal is greater than or equal to 200 kHz, and the frequency of the second coding signal is less than 50 kHz.

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