Touch device and touch signal detection method

Abstract

The application relates to a touch device and a touch signal detection method. The touch device comprises a processor and a touch sensor; the touch sensor comprises 2N electrodes, the 2N electrodes are arranged into two rows, the number of electrodes in each row is the same; two electrodes in adjacent two columns of electrodes and located in a diagonal direction are connected to each other to form an emitter and a receiver; the emitter and the receiver are connected to the processor; N is an integer greater than 1; the processor is used for generating a code signal of a first frequency for the emitter and inputting the code signal into the emitter; the first frequency is greater than or equal to a preset frequency; the processor is also used for detecting an output signal of the receiver, obtaining a touch signal amount, and determining a trigger source of a touch signal acting on the touch sensor based on the touch signal amount. By adopting the touch device, the trigger source of the touch signal can be accurately determined based on the 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 used to generate a coding signal of a first frequency for the emitter and input the coding signal to the emitter; the first frequency is greater than or equal to a preset frequency;

[0007] The processor is also used to detect the output signal of the receiver, obtain the touch signal quantity, and determine the trigger source of the touch signal acting on the touch sensor based on the touch signal quantity.

[0008] Secondly, this application provides a touch signal detection method applied in a touch device. The touch device includes a touch sensor, which includes 2N electrodes arranged in two rows, with the same number of electrodes in each row. Two electrodes in adjacent columns are connected diagonally to form an emitter and a receiver; N is an integer greater than 1. The method includes:

[0009] A coding signal of the first frequency is generated for the emitter, and the coding signal is input to the emitter; the first frequency is greater than or equal to a preset frequency;

[0010] The output signal of the receiving electrode is detected to obtain the touch signal quantity, and the trigger source of the touch signal acting on the touch sensor is determined based on the touch signal quantity.

[0011] 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 high-frequency coding signal for the emitter and inputs the coding signal to the emitter. The processor also detects the output signal of the receiver to obtain the touch signal quantity. Based on this, since the touch sensor has a specific structure, the touch signal quantity includes the mutual capacitance signal quantity between the emitter and receiver from different trigger sources. Therefore, due to the different electrical characteristics of different trigger sources, there are different mutual capacitance signal quantities. Thus, the touch device can determine the trigger source of the touch signal acting on the touch sensor based on the touch signal quantity. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is a schematic diagram of the structure of a touch device provided in an embodiment of this application;

[0014] Figure 2 This is a schematic diagram of the touch signal quantity under a trigger source condition provided in an embodiment of this application;

[0015] Figure 3 This is a schematic diagram of the touch signal quantity under another trigger source condition provided in the embodiments of this application;

[0016] Figure 4 This is a schematic diagram of the touch signal quantity under another trigger source condition provided in the embodiments of this application;

[0017] Figure 5 This is a flowchart illustrating a touch signal detection method provided in an embodiment of this application. Detailed Implementation

[0018] 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 thorough and complete.

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] This application was made by the inventor based on his understanding and research into the following issues:

[0025] 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.

[0026] 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.

[0027] 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.

[0028] The processor 102 is used to generate a coding signal of a first frequency for the emitter 106 and input the coding signal to the emitter 106; the first frequency is greater than or equal to a preset frequency.

[0029] The processor 102 is also used to detect the output signal of the receiver 108, obtain the touch signal quantity, and determine the trigger source of the touch signal acting on the touch sensor 104 based on the touch signal quantity.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] Optionally, electrode 1042 may be made of indium tin oxide, graphene, copper or other conductive materials.

[0035] 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.

[0036] 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 1042 out of 2N electrodes 1042 and the receiver 108 includes the other N electrodes 1042 out of 2N electrodes 1042.

[0037] Specifically, the touch sensor 104 is configured with an emitter 106 and a receiver 108 to generate a touch signal that is a mutual capacitance signal based on the coding signal and the touch signal. 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 a mutual capacitance signal and make it impossible to distinguish the trigger source of the touch signal.

[0038] 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.

[0039] Alternatively, the processor 102 may be a capacitance acquisition chip.

[0040] Specifically, since the human body has a higher conductivity than conductive liquids, and since a higher frequency coding signal corresponds to a larger amount of mutual capacitance signal, in order to accurately distinguish the trigger source of the touch signal from the touch signal quantity, it should be ensured that the touch signal quantity is generated under the action of the touch signal and a higher frequency coding signal. Therefore, the preset frequency should be a relatively high frequency. Optionally, the preset frequency can be 100 kHz, 150 kHz, 200 kHz, or other frequencies. The preset frequency only needs to ensure that the coding signal is a high-frequency coding signal. This application does not impose specific limitations on the size of the preset frequency.

[0041] In one exemplary embodiment, the preset frequency is greater than or equal to 200 kHz.

[0042] The coding signal refers to the encoded electrical signal (exemplarily, a pulse sequence, a sine wave, etc.) of a first frequency input to the emitter 106 by the processor 102, 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 an output signal, thereby enabling the processor 102 to detect the output signal of the receiver 108 to obtain the touch signal quantity.

[0043] Specifically, in the touch sensor 104, two electrodes 1042 in two 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. Thus, under the action of the coding signal input to the emitter 106 by the processor 102, the touch signal amount finally detected by the processor 102 from the receiver 108 is the mutual capacitance signal amount between the emitter 106 and the receiver 108.

[0044] In an exemplary embodiment, the processor 102 is configured to detect the output signal of the receiver 108 in a detection cycle, obtain the touch signal quantity, and determine the trigger source of the touch signal acting on the touch sensor 104 based on the touch signal quantity.

[0045] 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 faster determination of the trigger source of the touch signal by the touch device; conversely, a longer detection cycle results in 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.

[0046] Optionally, the detection period can be 20ms, 30ms, 50ms or other times.

[0047] 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.

[0048] 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.

[0049] Specifically, since different trigger sources of touch signals have different electrical characteristics, the processor 102 can accurately determine the trigger source of the touch signal based on the magnitude of the touch signal.

[0050] 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.

[0051] In an exemplary embodiment, after the processor 102 generates a coding signal of a first frequency for the emitter 106 and inputs the 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 coding signal, and obtain the output signal of the receiver 108, so that the processor 102 can detect the output signal of the receiver 108 to obtain the amount of touch signal, and the processor 102 can determine the trigger source of the touch signal acting on the touch sensor 104 based on the amount of touch signal.

[0052] 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 high-frequency coding signal for the emitter and inputs the coding signal to the emitter. The processor also detects the output signal of the receiver to obtain the touch signal quantity. Based on this, since the touch sensor has a specific structure, the touch signal quantity includes the mutual capacitance signal quantity between the emitter and receiver from different trigger sources. Therefore, due to the different electrical characteristics of different trigger sources, there are different mutual capacitance signal quantities. Thus, the touch device can determine the trigger source of the touch signal acting on the touch sensor based on the touch signal quantity.

[0053] 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 touch signal quantity is greater than 0; and to determine that the trigger source of the touch signal acting on the touch sensor is a conductive liquid when the touch signal quantity is less than 0.

[0054] It should be noted that the touch signal quantity also includes the self-capacitive signal quantity of the 2N electrodes. However, since the human body has strong conductivity, and when the emitter and receiver in the touch sensor are operating in mutual capacitance mode under the action of a coding signal of a first frequency greater than or equal to a preset frequency, if the triggering source of the touch signal includes the highly conductive human body, the mutual capacitance signal quantity obtained based on the higher frequency coding signal will be much greater than the self-capacitive signal quantity of the 2N electrodes. Therefore, when the triggering source of the touch signal includes the human body, the touch consumption is basically dominated by the mutual capacitance signal quantity, and the self-capacitive signal quantity of the 2N electrodes in the touch signal quantity can be ignored. That is to say, in this case, the touch signal quantity can be regarded as the mutual capacitance signal quantity between the emitter and receiver.

[0055] The touch signal quantity is the result of all the signal quantities generated by the mutual capacitance signals of the N electrodes in the emitter and N electrodes in the receiver of the entire touch sensor, as well as the self-capacitance signals of the 2N electrodes. In other words, the touch signal quantity corresponds to the entire touch sensor.

[0056] Optionally, the self-capacitive signal of the 2N electrodes can be the output signal of the reference electrode of the touch sensor obtained by the capacitance change of the 2N electrodes based on the coding signal and the touch signal. The reference electrode of the touch sensor is connected to the processor, so that the processor detects the self-capacitive signal of the 2N electrodes from the reference electrode of the touch sensor.

[0057] Specifically, since the processor in this embodiment determines the trigger source of the touch signal based on the mutual capacitance signal between the emitter and receiver, and there is a positive correlation between the area of ​​the electrode and the self-capacitance signal, that is, if the area of ​​the electrode is small, the self-capacitance signal generated by the electrode will also be small. Therefore, in order to avoid the undesirable situation that the self-capacitance signal is too small, resulting in a small difference between the touch signal quantities corresponding to the trigger sources of different touch signals, making it difficult for the processor to determine the trigger source of the touch signal from the touch signal quantity, the preset area should be a large area size, so as to avoid the undesirable situation that the self-capacitance signal of the electrode is too small, resulting in a small difference between the touch signal quantities of the signal sources of different touch signals.

[0058] Therefore, in an exemplary embodiment, the area of ​​the electrode is greater than or equal to a preset area.

[0059] The preset area can be 80mm².2 90mm 2 100mm 2 Or other area size.

[0060] In this embodiment, the electrode area is relatively large, thereby enabling the self-capacitance signal generated by the 2N electrodes to be larger. This avoids the situation where the self-capacitance signal of the 2N electrodes is small, resulting in a small difference in the touch signal amount of different touch signal trigger sources, which would prevent the processor from accurately distinguishing the faulty touch signal trigger source based on the touch signal amount when the processor determines the trigger source of the touch signal by the touch signal amount between the emitter and receiver. In this way, the touch device can accurately determine the trigger source of the touch signal based on the touch signal amount.

[0061] 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 touch signal quantity is greater than 0 and greater than or equal to a first preset signal quantity.

[0062] In an exemplary embodiment, the processor is configured to determine that the trigger source of the touch signal acting on the touch sensor is a conductive liquid when the touch signal quantity is less than 0 and less than or equal to a second preset signal quantity.

[0063] The trigger source for the touch signal includes a human body and may also include a conductive liquid. When the first frequency of the coding signal is greater than or equal to a preset frequency (i.e., the first frequency is relatively high), the touch signal quantity when the trigger source is only a human body, and the touch signal quantity when the trigger source includes both a human body and a conductive liquid, are both greater than the touch signal quantity when the trigger source is only a conductive liquid.

[0064] Specifically, when the first frequency of the coding signal is greater than or equal to the preset frequency, the emitter and receiver of the touch sensor operate in a high-frequency coding mutual capacitance mode.

[0065] 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 is greater than the amount of mutual capacitance signal generated when only the human body is involved. In other words, the amount of touch signal generated when the trigger source includes both the human body and the conductive liquid is greater than the amount of touch signal generated when only the human body is involved. Furthermore, since the conductivity of conductive liquids is weaker than that of the human body, the amount of mutual capacitance signal generated when the trigger source of the touch signal is the human body is greater than the amount of mutual capacitance signal generated when the trigger source is a conductive liquid.

[0066] Specifically, the touch signal triggering source, whether it is only a human body or includes both a human body and a conductive liquid, will have a touch signal quantity greater than 0. Therefore, as long as it can be determined that the touch signal triggering source must include a human body.

[0067] Optionally, the first preset semaphore and the second preset semaphore can be preset in the processor. The first preset semaphore and the second preset semaphore are related to the processor's configuration parameters for the touch sensor. For example, if the configuration of the touch sensor will have a large touch signal, then the first preset semaphore and the second preset semaphore need to be set to larger values ​​accordingly.

[0068] It should be noted that the touch signal quantity also includes the self-capacitive signal quantity of the 2N electrodes. The conductivity of conductive liquids, such as water, is weaker than that of the human body. If the trigger source of the touch signal is a conductive liquid, the mutual capacitance signal quantity obtained based on a higher frequency coding signal is relatively small. However, since the 2N electrodes have a large electrode area, the self-capacitive signal quantity of the 2N electrodes is relatively large. Moreover, the self-capacitive signal quantity is opposite to the mutual capacitance signal quantity in terms of signal quantity direction. Specifically, the mutual capacitance signal quantity caused by the conductive liquid is greater than 0, and the self-capacitive signal quantity of the 2N electrodes is less than 0. Therefore, when the trigger source of the touch signal is a conductive liquid, the touch signal quantity is dominated by the self-capacitive signal quantity with a larger absolute value. That is to say, after the signal quantities cancel each other out between the self-capacitive signal quantity with a smaller absolute value and the mutual capacitance signal quantity with a smaller absolute value, the touch signal quantity detected by the processor from the receiving electrode of the touch sensor is less than 0.

[0069] 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 touch signal quantity obtained based on the high-frequency coding signal is positive; such as Figure 3 As shown, when the touch signal from only the conductive liquid acts on the touch sensor, the touch signal quantity obtained based on the high-frequency coding signal is negative; for example... Figure 4As shown, firstly, when the conductive liquid acts on the touch sensor, the touch signal quantity obtained based on the high-frequency coding signal is negative. Then, when the human body and the conductive liquid suddenly act on the touch sensor simultaneously, the touch signal quantity obtained based on the high-frequency coding signal is positive. Finally, when the human body no longer acts on the touch sensor, and only the conductive liquid continues to act on the touch sensor, the touch signal quantity obtained based on the high-frequency coding signal is negative. Based on this, due to the different electrical characteristics of the human body and the conductive liquid, and considering that a mutual capacitance signal quantity can be obtained based on the high-frequency coding signal 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 the directionality of the touch signal quantity. Specifically, if the touch signal quantity is greater than 0, the trigger source of the touch signal is determined to include the human body; if the touch signal quantity is less than 0, the trigger source of the touch signal is determined to be the conductive liquid.

[0070] It should be noted that since the magnitude of the first frequency of the coding signal affects the magnitude of the mutual capacitance signal between the emitter and receiver of the touch sensor, and the size of the electrode area also affects the magnitude of the self-capacitance signal of each electrode, in order to ensure that the touch signal quantity is always greater than 0 when the trigger source of the touch signal includes the human body, and always less than 0 when the trigger source of the touch signal is a conductive liquid, so as to ensure that the touch device can accurately determine the trigger source of the touch signal based on the touch signal quantity, the magnitude of the first frequency and the size of the electrode should meet their respective corresponding conditions. That is to say, the first frequency needs to be a relatively high frequency, and the area of ​​the electrode should also be relatively large.

[0071] In one exemplary embodiment, the electrode is rectangular in shape.

[0072] In one exemplary embodiment, the ratio between the length and width of the electrode is 1.6 to 1.8.

[0073] Optionally, the length of the electrode can be 12mm to 13mm, and the width of the electrode can be 6.5mm to 7.5mm, as long as the aspect ratio between the length and width of the electrode is 1.6 to 1.8.

[0074] 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 0.15 to 0.25; 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 0.25 to 0.4.

[0075] 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.

[0076] The size of the first spacing D1 and the size of the second spacing D2 can be the same or different.

[0077] In one exemplary embodiment, N is 6.

[0078] In the case of N=6, the touch sensor includes 12 electrodes. At this time, the touch sensor is set in two rows, with 6 electrodes in each row. That is to say, the 12 electrodes of the touch sensor are a 2*6 electrode array.

[0079] Alternatively, N can also be 3, 4, 5 or other numbers.

[0080] 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.

[0081] 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.

[0082] Based on the same inventive concept, this application also provides a touch signal detection method applied in a touch device. The touch device includes a touch sensor, which includes 2N electrodes arranged in two rows, with the same number of electrodes in each row. Two electrodes in adjacent columns are connected diagonally to form an emitter and a receiver; N is an integer greater than 1. Figure 5 As shown, the method includes the following steps 502 to 504:

[0083] 502 generates a coding signal of the first frequency for the emitter and inputs the coding signal to the emitter; the first frequency is greater than or equal to a preset frequency.

[0084] 504. Detect the output signal of the receiving electrode to obtain the touch signal quantity, and determine the trigger source of the touch signal acting on the touch sensor based on the touch signal quantity.

[0085] The above-described 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 two adjacent columns located diagonally are connected to each other to form an emitter and a receiver. The method generates a high-frequency coding signal for the emitter and inputs the coding signal to the emitter. Then, the output signal of the receiver is detected to obtain the touch signal quantity. Based on this, since the touch sensor has a specific structure, the touch signal quantity at this time is the mutual capacitance signal quantity between the emitter and the receiver. Therefore, since different trigger sources correspond to different mutual capacitance signal quantities, the touch device can determine the trigger source of the touch signal acting on the touch sensor based on the touch signal quantity.

[0086] It should be noted that the solution provided by this touch signal detection method is similar to the solution described in the above-mentioned touch device. Therefore, the specific limitations of 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.

[0087] In an exemplary embodiment, the above-described determination of the trigger source of the touch signal acting on the touch sensor based on the amount of touch signal includes:

[0088] When the touch signal quantity is greater than 0, the trigger source for the touch signal acting on the touch sensor is determined to include the human body.

[0089] When the touch signal quantity is less than 0, the trigger source of the touch signal acting on the touch sensor is determined to be a conductive liquid.

[0090] In an exemplary embodiment, determining that the trigger source of the touch signal acting on the touch sensor includes a human body when the touch signal quantity is greater than 0 includes:

[0091] When the touch signal quantity is greater than 0 and greater than or equal to the first preset signal quantity, it is determined that the trigger source of the touch signal acting on the touch sensor includes the human body.

[0092] The above-mentioned determination that the trigger source of the touch signal acting on the touch sensor is a conductive liquid when the touch signal quantity is less than 0 includes:

[0093] When the touch signal quantity is less than 0 and less than or equal to the second preset signal quantity, the trigger source of the touch signal acting on the touch sensor is determined to be a conductive liquid.

[0094] 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.

[0095] 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.

[0096] 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 coding signal of a first frequency for the emitter and input the coding signal to the emitter; the first frequency is greater than or equal to 100 kHz; The processor is further configured to detect the output signal of the receiving electrode, obtain the touch signal quantity, and determine that the trigger source of the touch signal acting on the touch sensor includes a human body when the touch signal quantity is greater than 0; and determine that the trigger source of the touch signal acting on the touch sensor is a conductive liquid when the touch signal quantity is less than 0. The touch signal quantity is the result of the total signal quantity generated by the mutual capacitance signal quantity generated by the N electrodes in the emitter and N electrodes in the receiver of the entire touch sensor, as well as the self-capacitance signal quantity of the 2N electrodes. The self-capacitance signal quantity is opposite to the mutual capacitance signal quantity in terms of signal quantity directionality. When the triggering source of the touch signal includes the human body, the absolute value of the mutual capacitance signal quantity is greater than the absolute value of the self-capacitance signal quantity. When the triggering source of the touch signal is a conductive liquid, the absolute value of the self-capacitance signal quantity is greater than the absolute value of the mutual capacitance signal quantity.

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

3. The device according to claim 1, characterized in that, The electrode is rectangular in shape.

4. The device according to claim 3, characterized in that, The ratio between the length and width of the electrode is 1.6 to 1.

8.

5. 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 0.15 to 0.25; 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 0.25 to 0.

4.

6. The device according to claim 1, characterized in that, The value of N is 6.

7. The device according to claim 2, characterized in that, The preset area is 80mm² 2 90mm 2 100mm 2 one of the.

8. A touch signal detection method, characterized in that, The touch sensor is used in a touch device, which includes 2N electrodes arranged in two rows, with each row having the same number of electrodes. Two electrodes in two adjacent columns are connected to each other in a diagonal direction to form an emitter and a receiver. N is an integer greater than 1; the method includes: A coding signal of a first frequency is generated for the emitter, and the coding signal is input to the emitter; the first frequency is greater than or equal to 100 kHz; The output signal of the receiving electrode is detected to obtain the touch signal quantity. If the touch signal quantity is greater than 0, it is determined that the trigger source of the touch signal acting on the touch sensor includes a human body; if the touch signal quantity is less than 0, it is determined that the trigger source of the touch signal acting on the touch sensor is a conductive liquid. The touch signal quantity is the result of the total signal quantity generated by the mutual capacitance signal quantity generated by the N electrodes in the emitter and N electrodes in the receiver of the entire touch sensor, as well as the self-capacitance signal quantity of the 2N electrodes. The self-capacitance signal quantity is opposite to the mutual capacitance signal quantity in terms of signal quantity directionality. When the triggering source of the touch signal includes the human body, the absolute value of the mutual capacitance signal quantity is greater than the absolute value of the self-capacitance signal quantity. When the triggering source of the touch signal is a conductive liquid, the absolute value of the self-capacitance signal quantity is greater than the absolute value of the mutual capacitance signal quantity.

9. The method according to claim 8, characterized in that, When the touch signal quantity is greater than 0, determining that the trigger source of the touch signal acting on the touch sensor includes the human body includes: When the touch signal quantity is greater than 0 and greater than or equal to the first preset signal quantity, it is determined that the trigger source of the touch signal acting on the touch sensor includes the human body; The step of determining that the trigger source of the touch signal acting on the touch sensor is a conductive liquid when the touch signal quantity is less than 0 includes: When the touch signal quantity is less than 0 and less than or equal to the second preset signal quantity, the trigger source of the touch signal acting on the touch sensor is determined to be a conductive liquid.

10. The method according to claim 8, characterized in that, The first frequency is greater than or equal to 200 kHz.

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