Touch device and touch signal detection method

Abstract

The invention 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 in two rows, and the number of the electrodes in each row is the same; the two electrodes, located in the diagonal direction, in the two adjacent columns of electrodes are connected with each other to form an emitting electrode and a receiving electrode. The emitting electrode and the receiving electrode are respectively connected with the processor; n is an integer greater than 1; the processor is used for generating a code printing signal of a first frequency for the emitting electrode and inputting the code printing signal to the emitting electrode; the first frequency is greater than or equal to preset frequency; and the processor is also used for detecting the output signal of the receiving electrode to obtain a touch semaphore and determining a trigger source of the touch signal acting on the touch sensor based on the touch semaphore. By adopting the touch equipment, the trigger source of the touch signal can be accurately determined on the basis of the touch sensor with a specific structure.

Description

Technical Field

[0001] The present application relates to the technical field of touch recognition, and particularly to a touch device and a touch signal detection method. Background Art

[0002] Capacitive touch buttons can determine whether there is a finger touch action by detecting the capacitance change of electrodes, and now have become a commonly used user interaction function device. Compared with traditional mechanical buttons, capacitive touch buttons have many advantages such as beautiful appearance, low cost, low power consumption, and long service life. Therefore, the application demand is gradually increasing continuously.

[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, when there is a conductive liquid above the capacitive touch button, if the trigger source of the touch signal cannot be accurately determined as the conductive liquid or the human body, it will cause the capacitive touch button to malfunction. Summary of the Invention

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

[0005] In a first aspect, the present application provides a touch device. The touch device includes a processor and a touch sensor; the touch sensor includes 2N electrodes, the 2N electrodes are arranged in two rows, and the number of electrodes in each row is the same; two electrodes located in the diagonal direction in two adjacent columns 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 coding signal with 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 further configured to detect the output signal of the receiver, obtain a touch signal amount, and determine the trigger source of the touch signal acting on the touch sensor based on the touch signal amount.

[0008] In a second aspect, the present application provides a touch signal detection method, which is applied to a touch device. The touch device includes a touch sensor, the touch sensor includes 2N electrodes, the 2N electrodes are arranged in two rows, and the number of electrodes in each row is the same; two electrodes located in the diagonal direction in two adjacent columns are connected to each other to form an emitter and a receiver; N is an integer greater than 1. The method includes:

[0009] Generating a coding signal with a first frequency for the emitter and inputting the coding signal to the emitter; the first frequency is greater than or equal to a preset frequency;

[0010] Detect the output signal of the receiving electrode to obtain a touch signal quantity, and determine the trigger source of the touch signal acting on the touch sensor based on the touch signal quantity.

[0011] For the above touch device and touch signal detection method, the touch device includes a processor and a touch sensor. Among the 2N electrodes included in the touch sensor, two electrodes located in the diagonal direction in adjacent two columns are connected to each other to form an emitting electrode and a receiving electrode. Moreover, the processor is configured to generate a coding signal with a relatively high frequency for the emitting electrode, input the coding signal to the emitting electrode, and then the processor is further configured to detect the output signal of the receiving electrode to obtain a touch signal quantity. Based on this, since the touch sensor has a specific structure, the touch signal quantity at this time includes the mutual capacitance signal quantities between different trigger sources at the emitting electrode and the receiving electrode. Thus, because the electrical characteristics of different trigger sources are different and 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 touch signal quantity. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0013] Figure 1 It is a schematic structural diagram of a touch device provided by an embodiment of the present application;

[0014] Figure 2 It is a schematic curve diagram of the touch signal quantity in a case of a trigger source provided by an embodiment of the present application;

[0015] Figure 3 It is a schematic curve diagram of the touch signal quantity in another case of a trigger source provided by an embodiment of the present application;

[0016] Figure 4 It is a schematic curve diagram of the touch signal quantity in yet another case of a trigger source provided by an embodiment of the present application;

[0017] Figure 5 It is a schematic flowchart of a touch signal detection method provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[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 technical field to which this application belongs. The terms used in the specification of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0020] It can be understood that the terms "first", "second", etc. used in this application can be used herein to describe various objects, but these objects are not limited by these terms. These terms are only used to distinguish the first object from another object. For example, without departing from the scope of this application, the first touch signal amount can be referred to as the second touch signal amount, and similarly, the second touch signal amount can be referred to as the first touch signal amount. Both the first touch signal amount and the second touch signal amount are touch signal amounts, but they are not the same touch signal amount.

[0021] It can be understood that in the following embodiments, "connection", if there is an electrical signal or data transfer between the connected circuits, modules, units, etc., should be understood as "electrical connection", "communication connection", etc.

[0022] It can be understood that "at least one" means one or more, and "a plurality" means two or more. "At least part of an element" means part or all of the element.

[0023] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprise / include" or "have" 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. At the same time, the term "and / or" used in this specification includes any and all combinations of the related listed items.

[0024] This application is made by the inventors based on the understanding and research of the following problems:

[0025] During the use of a capacitive touch button, if there is a conductive liquid such as a water droplet above the capacitive touch button, these conductive liquids will also change the capacitance of the electrodes. Currently, most capacitive touch buttons detect touch signals in a single self-capacitance mode for the electrodes. Whether it is finger touch coverage or conductive liquid coverage, it will increase the self-capacitance signal amount of the capacitive touch button operating in the single self-capacitance mode.

[0026] Obviously, for the current capacitive touch buttons, it is difficult to accurately distinguish from the change in the signal amount whether the trigger source of the touch signal is a human body or a conductive liquid. Therefore, when there is a conductive liquid above the capacitive touch button, it is easy to cause mis-touch phenomena. Based on this, the present application proposes a touch device that enables the electrodes to detect touch signals in a mutual capacitance mode.

[0027] As Figure 1 shown, a touch device according to an embodiment includes a processor 102 and a touch sensor 104; the touch sensor 104 includes 2N electrodes 1042, and the 2N electrodes 1042 are arranged in two rows, and the number of electrodes 1042 in each row is the same; two electrodes 1042 located in the diagonal direction in two adjacent columns of the electrodes 1042 are connected to each other to form a transmitting electrode 106 and a receiving electrode 108; the transmitting electrode 106 and the receiving electrode 108 are respectively connected to the processor 102; N is an integer greater than 1.

[0028] The processor 102 is configured to generate a coding signal with a first frequency for the transmitting electrode 106 and input the coding signal to the transmitting electrode 106; the first frequency is greater than or equal to a preset frequency.

[0029] The processor 102 is further configured to detect the output signal of the receiving electrode 108, obtain a touch signal amount, and determine the trigger source of the touch signal acting on the touch sensor 104 based on the touch signal amount.

[0030] Among them, a touch device refers to an electronic device that can detect the change in the touch signal amount when a human body or a conductive object touches or approaches its surface, and convert the change in the touch signal amount presented in the form of an electrical signal into a touch signal amount presented in the form of a digital signal to achieve interactive input. Specifically, the change in the touch signal amount refers to the change in capacitance.

[0031] The touch sensor 104 refers to a device in the touch device that can detect the change in the touch signal amount when a human body or a conductive object touches or approaches its surface, and feedback the change in the touch signal amount to the processor 102 in the touch device. That is to say, the touch sensor 104 is a key device in the touch device for sensing touch signals. Optionally, the touch sensor can be a quadrilateral sensor.

[0032] A touch signal refers to the capacitance change caused by a touch operation, and the capacitance change can be characterized as an electrical signal of a touch event after being processed by the processor 102.

[0033] The electrode 1042 refers to a conductive component in the touch device that generates a change in the touch signal quantity under the action of the coding signal and the touch signal.

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

[0035] Two electrodes 1042 in the diagonal direction among two adjacent columns of electrodes 1042 refer to two electrodes 1042 that are neither in the same row nor in the same column among two adjacent columns of electrodes 1042.

[0036] Since the emitter 106 and the receiver 108 are respectively formed by connecting two electrodes 1042 in the diagonal direction among two adjacent columns of electrodes 1042 to each other, therefore, the emitter 106 includes N electrodes 1042 out of the 2N electrodes 1042, and the receiver 108 includes the other N electrodes 1042 out of the 2N electrodes 1042.

[0037] Specifically, the touch sensor 104 needs to form the emitter 106 and the receiver 108 respectively in order to be able to generate a touch signal quantity presented as a mutual capacitance signal quantity based on the coding signal and the touch signal; and two electrodes 1042 in the diagonal direction among two adjacent columns of electrodes 1042 are connected to each other in order to ensure that no matter where the human touch signal covers on the touch sensor 104, it can cover both the emitter 106 and the receiver 108 at the same time, so as to avoid the bad situation that the emitter 106 and the receiver 108 cannot be covered simultaneously, resulting in the inability to generate a mutual capacitance signal quantity and the inability to distinguish the trigger source of the touch signal.

[0038] The processor 102 refers to a device in the touch device that configures the working mode of the touch sensor 104, detects the change in the touch signal quantity from the touch sensor 104, and converts the change in the touch signal quantity presented in the form of an electrical signal into a touch signal quantity presented in the form of a digital signal.

[0039] Optionally, the processor 102 can be a capacitance acquisition chip.

[0040] Specifically, since the conductivity of the human body is stronger than that of the conductive liquid, and at the same time, since the larger the frequency of the coding signal, the larger the mutual capacitance signal volume, in order to accurately distinguish the trigger source of the touch signal from the touch signal volume, it should be ensured that the touch signal volume is generated under the action of the touch signal and the coding signal with a higher frequency. Therefore, the preset frequency should be a higher 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, and the present application does not specifically limit the magnitude of the preset frequency here.

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

[0042] The coding signal refers to the coded electrical signal of the first frequency input by the processor 102 to the emitter 106 (exemplarily, pulse sequence, sine wave, etc.), which is used to form an excitation electric field in the touch sensor 104, so that the receiving electrode 108 can detect the change in the mutual capacitance between the emitter 106 and the receiving electrode 108 based on the excitation electric field and the touch signal to obtain an output signal. Thus, the processor 102 can detect the output signal of the receiving electrode 108 to obtain the touch signal volume.

[0043] 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 the emitter 106 and the receiving electrode 108, and the emitter 106 and the receiving electrode 108 are respectively connected to the processor 102. Thus, under the action of the coding signal input by the processor 102 to the emitter 106, the touch signal volume finally detected by the processor 102 from the receiving electrode 108 is the mutual capacitance signal volume between the emitter 106 and the receiving electrode 108.

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

[0045] Wherein, the detection period refers to the time required for the touch sensor 104 to cyclically detect the capacitance values of 2N electrodes 1042 periodically at a fixed time. The shorter the detection period, the faster the touch device determines the trigger source of the touch signal. On the contrary, the longer the detection period, the slower the touch device determines the trigger source of the touch signal. Therefore, there is a negative correlation between the time length of the detection period and the determination speed of the trigger source of the touch signal by the touch device.

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

[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, that is, the source of the touch signal.

[0048] Optionally, the trigger source of the touch signal can include the human body and conductive liquid. Optionally, the human body can be a person's finger. Optionally, the conductive liquid can be water, electrolyte solution or other liquids with conductivity.

[0049] Specifically, since different trigger sources of the touch signal itself 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 of the touch signal. Exemplarily, when the trigger source of the touch signal includes the human body, the touch signal is responded to. On the contrary, when the trigger source of the touch signal is a conductive liquid, the touch signal is not responded to avoid false touch.

[0051] In an exemplary embodiment, after the processor 102 generates a coding signal with 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 capacitance change amount 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 detects the output signal of the receiver 108 to obtain the touch signal amount, and enables the processor 102 to determine the trigger source of the touch signal acting on the touch sensor 104 based on the touch signal amount.

[0052] In the above touch device and touch signal detection method, the touch device includes a processor and a touch sensor. Among the 2N electrodes included in the touch sensor, two electrodes located in the diagonal direction in adjacent two columns are connected to each other to form an emitter and a receiver. And the processor is used to generate a coding signal with a relatively high frequency for the emitter and input the coding signal to the emitter. Then, the processor is also used to detect the output signal of the receiver to obtain the touch signal amount. Based on this, since the touch sensor has a specific structure, the touch signal amount at this time includes the mutual capacitance signal amounts between different trigger sources between the emitter and the receiver. Thus, due to the different electrical characteristics of different trigger sources, there are different mutual capacitance signal amount situations. Therefore, the touch device can determine the trigger source of the touch signal acting on the touch sensor based on the touch signal amount.

[0053] In an exemplary embodiment, the above-mentioned processor is used to determine that the trigger source of the touch signal acting on the touch sensor includes the human body when the touch signal amount 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 amount is less than 0.

[0054] It should be noted that the touch signal also includes the self-capacitance signal of the 2N electrodes. However, since the human body has strong conductivity, and at this time, the emitter and the receiving electrode in the touch sensor operate in the mutual capacitance mode under the action of the coding signal of the first frequency greater than or equal to the preset frequency, if the trigger source of the touch signal includes the human body with strong conductivity, then the mutual capacitance signal obtained based on the higher frequency coding signal will be much larger than the self-capacitance signal of the 2N electrodes. Therefore, when the trigger source of the touch signal includes the human body, the touch consumption is basically dominated by the mutual capacitance signal, and the self-capacitance signal of the 2N electrodes in the touch signal can be ignored. That is to say, in this case, the touch signal can be regarded as the mutual capacitance signal between the emitter and the receiving electrode.

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

[0056] Optionally, the self-capacitance signal of the 2N electrodes can be the output signal of the reference electrode of the touch sensor obtained based on the capacitance change caused by the coding signal and the touch signal of the 2N electrodes. The reference electrode of the touch sensor is connected to the processor, so that the processor detects the self-capacitance 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 the 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 smaller, the self-capacitance signal generated by the electrode will also be smaller. Therefore, in order to avoid the undesirable situation where the self-capacitance signal is too small, resulting in a small difference between the touch signal amounts 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 amount, the preset area should be a larger area size to avoid as much as possible the undesirable situation where the self-capacitance signal of the electrode is too small, resulting in a small difference between the touch signal amounts of the signal sources of different touch signals.

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

[0059] Among them, the preset area can be 80mm2 , 90 mm 2 , 100 mm 2 or other area sizes.

[0060] In this embodiment, the area of the electrodes is relatively large. Thus, the self-capacitance signals generated by 2N electrodes are relatively large, avoiding the situation where the self-capacitance signals of the 2N electrodes are relatively small during the process in which the processor determines the trigger source of the touch signal based on the touch signal amount between the emitter and the receiver, resulting in a small difference in the touch signal amounts of different touch signal trigger sources, and further avoiding the situation where the processor cannot accurately distinguish the trigger source of the touch signal from the touch signal amount. Furthermore, it ensures that 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 above-mentioned 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 amount is greater than 0 and greater than or equal to a first preset signal amount.

[0062] In an exemplary embodiment, the above-mentioned 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 amount is less than 0 and less than or equal to a second preset signal amount.

[0063] Among them, the trigger source of the touch signal including a human body may also include a conductive liquid. When the first frequency of the coding signal is greater than or equal to the preset frequency, that is, when the first frequency is relatively high, the touch signal amount when the trigger source of the touch signal is only a human body and the touch signal amount when the trigger source of the touch signal includes both a human body and a conductive liquid are both greater than the touch signal amount when the trigger source of the touch signal is 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 the receiver of the touch sensor operate in a high-frequency coding mutual capacitance mode.

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

[0066] Specifically, for the trigger source of the touch signal, whether it is only the human body or includes both the human body and a conductive liquid, the touch signal quantity is greater than 0. Therefore, it is only necessary to be able to determine that the touch signal quantity is greater than 0 to determine that the trigger source of the touch signal must include the human body.

[0067] Optionally, the first preset signal quantity and the second preset signal quantity can be respectively preset in the processor; the first preset signal quantity and the second preset signal quantity are related to the configuration parameters of the touch sensor by the processor. Exemplarily, if the configuration mode of the touch sensor has a relatively large touch signal quantity, then the first preset signal quantity and the second preset signal quantity also need to be set to relatively large values respectively.

[0068] It should be noted that among the touch signal quantities, there is also the self-capacitance signal quantity of 2N electrodes. The conductivity of a conductive liquid such as water is weaker than that of the human body. If the trigger source of the touch signal is a conductive liquid, even the mutual capacitance signal quantity obtained based on a high-frequency coding signal with a relatively high frequency is relatively small. However, due to the relatively large electrode area of the 2N electrodes, the self-capacitance signal quantity of the 2N electrodes is relatively large, and the self-capacitance signal quantity is opposite to the mutual capacitance signal quantity in terms of the directionality of the signal quantity. Specifically, the mutual capacitance signal quantity caused by the conductive liquid is greater than 0 and the self-capacitance signal quantity of the 2N electrodes is less than 0. Furthermore, when the trigger source of the touch signal is a conductive liquid, in this case, the touch signal quantity is dominated by the self-capacitance signal quantity with a larger absolute value. That is to say, after the signal quantity cancellation between the self-capacitance signal quantity less than 0 and with a larger absolute value and the mutual capacitance signal quantity greater than 0 but with a smaller absolute value, in this case, the touch signal quantity detected by the processor from the receiving pole of the touch sensor is less than 0.

[0069] Exemplarily, taking the time node on the time axis as the abscissa and the touch signal quantity as the ordinate, in the case of using the touch device provided by the embodiment of the present application including a touch sensor with a specific structure, as Figure 2 shown, when the touch signal with only the human body as the trigger source acts on the touch sensor, the touch signal quantity obtained based on the high-frequency coding signal with a relatively high frequency is positive; as Figure 3 shown, when the touch signal with only the conductive liquid as the trigger source acts on the touch sensor, the touch signal quantity obtained based on the high-frequency coding signal with a relatively high frequency is negative; as Figure 4As shown, first, when the conductive liquid acts on the touch sensor, the amount of touch signal obtained based on the high-frequency coding signal with a relatively high frequency is negative. Then, when a human body suddenly acts on the touch sensor simultaneously with the conductive liquid, the amount of touch signal obtained based on the high-frequency coding signal with a relatively high frequency 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 amount of touch signal obtained based on the high-frequency coding signal with a relatively high frequency is negative. Based on this, due to the different electrical characteristics of the human body and the conductive liquid, in the case where the emitter and the receiver can obtain the mutual capacitance signal amount based on the high-frequency coding signal, the touch device provided in the present application, which includes 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 amount of touch signal. Specifically, if the amount of touch signal is greater than 0, it is determined that the trigger source of the touch signal includes the human body; if the amount of touch signal is less than 0, it is determined that the trigger source of the touch signal is 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 amount between the emitter and the receiver of the touch sensor, and the size of the electrode area also affects the self-capacitance signal amount of each electrode. Therefore, in order to ensure that the amount of touch signal is necessarily greater than 0 when the trigger source of the touch signal includes the human body, and necessarily less than 0 when the trigger source of the touch signal is the conductive liquid, so as to ensure that the touch device can accurately determine the trigger source of the touch signal based on the amount of touch signal, the magnitude of the first frequency and the size of the electrode should respectively meet their 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 an exemplary embodiment, the shape of the electrode is rectangular.

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

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

[0074] In an exemplary embodiment, as Figure 1 shown, the first spacing D1 between 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 between 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] Among them, the first pitch D1 between adjacent columns of electrodes refers to the straight-line distance in the row direction of the electrodes in the same row of adjacent columns of electrodes; the second pitch D2 between adjacent rows of electrodes refers to the straight-line distance in the column direction of the electrodes in the same column of adjacent rows of electrodes.

[0076] The magnitude of the first pitch D1 and the magnitude of the second pitch D2 may be the same or may be different.

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

[0078] Among them, when N = 6, the touch sensor includes 12 electrodes. At this time, the touch sensor is arranged in two rows, and the number of electrodes in each row is 6. That is to say, the 12 electrodes of the touch sensor at this time are a 2*6 electrode array.

[0079] Optionally, N may also be 3, 4, 5 or other numbers.

[0080] It can be understood that the above touch device may also adopt other forms, rather than being limited to the forms already 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 above touch device may be various personal computers, laptop computers, smart phones, tablet computers, Internet of Things devices, portable wearable devices, game devices or other devices with touch functions.

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

[0083] 502, generate a coding signal with 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.

[0084] 504, detect the output signal of the receiver, obtain a touch signal amount, and determine the trigger source of the touch signal acting on the touch sensor based on the touch signal amount.

[0085] The above touch signal detection method is applied to a touch device including a touch sensor. Among the 2N electrodes included in the touch sensor, two electrodes located in the diagonal direction in adjacent columns are connected to each other to form an emitter and a receiver. Moreover, the method is used to generate a coding signal with a relatively high frequency for the emitter, input the coding signal to the emitter, and then detect 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 at this time is the mutual capacitance signal quantity between the emitter and the receiver. Thus, because 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 touch signal quantity.

[0086] It should be noted that the implementation solution provided by this touch signal detection method for solving problems is similar to the implementation solution described in the above touch device. Therefore, the specific limitations in one or more of the above-described touch signal detection method embodiments can be referred to the limitations on the touch device in the above text, and will not be elaborated here.

[0087] In an exemplary embodiment, the above determining the trigger source of the touch signal acting on the touch sensor based on the touch signal quantity includes:

[0088] When 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 the human body.

[0089] When 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.

[0090] In an exemplary embodiment, the above 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:

[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 when the touch signal quantity is less than 0, determining that the trigger source of the touch signal acting on the touch sensor is a conductive liquid includes:

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

[0094] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0095] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as within the scope described in this specification.

[0096] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A touch device, characterized in that, It includes a processor and a touch sensor; the touch sensor includes 2N electrodes, the 2N electrodes are arranged in two rows, and the number of electrodes in each row is the same; two electrodes in the diagonal direction in adjacent columns 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 with a first frequency for the emitter and input the coding signal into the emitter; the first frequency is greater than or equal to a preset frequency; The processor is further configured to detect the output signal of the receiver, obtain a touch signal quantity, and determine a trigger source of a touch signal acting on the touch sensor based on the touch signal quantity.

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

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

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

8.

5. The device according to claim 1, characterized in that, The first spacing between adjacent columns of electrodes is the same, and the ratio of the first spacing to the length of the electrode is 0.15 - 0.25; the second spacing between adjacent rows of electrodes is the same, and the ratio of the second spacing to the width of the electrode is 0.25 - 0.

4.

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

7. A touch signal detection method, characterized in that: Applied to a touch device, the touch device includes a touch sensor, the touch sensor includes 2N electrodes, the 2N electrodes are arranged in two rows, and the number of electrodes in each row is the same; two electrodes in the diagonal direction in adjacent columns are connected to each other to form an emitter and a receiver; N is an integer greater than 1; the method includes: Generating a coding signal with a first frequency for the emitter and inputting the coding signal into the emitter; the first frequency is greater than or equal to a preset frequency; Detecting the output signal of the receiver, obtaining a touch signal quantity, and determining a trigger source of a touch signal acting on the touch sensor based on the touch signal quantity.

8. The method according to claim 7, wherein The determining a trigger source of a touch signal acting on the touch sensor based on the touch signal quantity includes: When the touch signal quantity is greater than 0, determining that the trigger source of the touch signal acting on the touch sensor includes a human body; When the touch signal quantity is less than 0, determining that the trigger source of the touch signal acting on the touch sensor is a conductive liquid.

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

10. The method according to claim 7, wherein The preset frequency is greater than or equal to 200 kHz.

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