Capacitive touch detection device and touch detection method

Abstract

The invention relates to the technical field of touch interaction, in particular to a capacitive touch detection device and a touch detection method. According to the embodiment of the invention, the capacitive touch detection device comprises an isolation driving module and a touch detection branch. Wherein the isolation driving module comprises a signal driving unit, a first driving external connection end and a second driving external connection end, the first driving external connection end is used for being connected with a power supply public network, and the second driving external connection end is used for being externally connected with a target environment. The detection contact, the measuring element and the touch signal output end of the touch detection branch are sequentially connected in series, one end of the shielding element is used for being connected with a power supply public network, and the other end of the shielding element is connected between the detection contact and the measuring element. According to the capacitive touch detection method, an isolation driving signal needs to be output, touch operation is executed on a detection contact in response to a target object, and a touch signal is generated. In this way, on the basis that the applicability is improved, good performance can be achieved in the aspect of recognition accuracy.

Description

Technical Field

[0001] This application relates to the field of touch interaction technology, and in particular to a capacitive touch detection device and a touch detection method. Background Art

[0002] In related technologies, although capacitive touch detection technology has been widely used in various devices due to its high precision, fast response, and multi-touch support, it has some technical problems. These mainly include poor environmental adaptability, inapplicability to large-screen devices, and a decrease in recognition ability when wearing insulating gloves.

[0003] Currently, these above-mentioned problems have restricted the application scope of capacitive touch detection technology and affected the user experience. Therefore, how to improve the applicability of capacitive touch detection while also achieving good performance in recognition accuracy has become an urgent problem in the industry. Summary of the Invention

[0004] This application aims to at least solve the above-mentioned technical problems existing in related technologies. For this purpose, this application proposes a capacitive touch detection device and a touch detection method, which can improve the applicability and also achieve good performance in recognition accuracy.

[0005] The capacitive touch detection device according to the first aspect embodiment of this application includes:

[0006] An isolation driving module, including a signal driving unit, a first driving external connection terminal, and a second driving external connection terminal. The first driving external connection terminal is used to connect to the power supply common network, and the second driving external connection terminal is used to be externally connected to the target environment. Among them, the signal driving unit is used to form an isolation driving signal and output the isolation driving signal through the first driving external connection terminal and the second driving external connection terminal;

[0007] At least one touch detection branch, the touch detection branch includes a detection contact, a measuring element, a shielding element, and a touch signal output terminal. The detection contact, the measuring element, and the touch signal output terminal are connected in series in sequence. One end of the shielding element is used to connect to the power supply common network, and the other end of the shielding element is connected between the detection contact and the measuring element. Among them, the touch detection branch is used to detect the touch operation performed when the target object is in the target environment and generate a touch signal according to the touch operation.

[0008] According to some embodiments of this application, the measuring element is a measuring switch, and the shielding element is a shielding switch.

[0009] According to some embodiments of the present application, the capacitive touch detection device further includes a plurality of the touch detection branches, an array touch screen, and a touch screen signal output terminal; wherein, the plurality of the touch detection branches include a first number of row position detection branches;

[0010] The detection contacts of the first number of the row position detection branches are arranged at preset row sorting positions in the array touch screen; wherein, the touch signal output terminals of each of the row position detection branches are commonly connected to the touch screen signal output terminal.

[0011] According to some embodiments of the present application, the plurality of the touch detection branches further include a second number of column position detection branches;

[0012] The detection contacts of the second number of the column position detection branches are arranged at preset column sorting positions in the array touch screen; wherein, the touch signal output terminals of each of the row position detection branches and the touch signal output terminals of each of the column position detection branches are commonly connected to the touch screen signal output terminal.

[0013] According to some embodiments of the present application, the row arrangement position includes a plurality of groups of juxtaposed and parallel row arrangement sub-positions; wherein, the detection contacts of the row position detection branches are sequentially arranged at each of the row arrangement sub-positions.

[0014] According to some embodiments of the present application, the measurement switch is an NMOS switch or a PMOS switch, and the shielding switch is an NMOS switch or a PMOS switch.

[0015] According to some embodiments of the present application, the measurement element is a diode, and the shielding element is an NMOS switch or a PMOS switch.

[0016] According to some embodiments of the present application, the measurement element is a high-value resistor, and the shielding element is an NMOS switch or a PMOS switch.

[0017] According to some embodiments of the present application, the capacitive touch detection device is provided with one of the touch detection branches; wherein, the measurement element is a wire, and the shielding element is a diode or a PMOS switch.

[0018] According to some embodiments of the present application, a first drive signal processing element is arranged between the first drive external terminal and the power supply common network, the first drive external terminal is connected to one end of the first drive signal processing element, and the power supply common network is connected to the other end of the first drive signal processing element.

[0019] According to some embodiments of the present application, a second drive signal processing element is arranged between the second drive external terminal and the target environment.

[0020] The capacitive touch detection method according to the second aspect embodiment of the present application is applied to the capacitive touch detection device described in any one of the first aspect embodiments. The capacitive touch detection device includes an isolation driving module and at least one touch detection branch. The first driving external connection end of the isolation driving module is connected to the power supply common network, and the second driving external connection end of the isolation driving module is externally connected to the target environment. One end of the shielding element in the touch detection branch is connected to the power supply common network. The method includes:

[0021] Generate an isolation driving signal through the isolation driving module, and output the isolation driving signal through the first driving external connection end and the second driving external connection end;

[0022] In response to a touch operation on the detection contact when the target object is in the target environment, generate a touch signal through the touch detection branch corresponding to the detection contact.

[0023] The capacitive touch detection device and the touch detection method according to the embodiments of the present application at least have the following beneficial effects:

[0024] The capacitive touch detection device according to the embodiment of the present application includes: an isolation driving module and at least one touch detection branch. Among them, the isolation driving module includes a signal driving unit, a first driving external connection end, and a second driving external connection end. The first driving external connection end is used to connect to the power supply common network, and the second driving external connection end is used to be externally connected to the target environment. The touch detection branch includes a detection contact, a measuring element, a shielding element, and a touch signal output end. The detection contact, the measuring element, and the touch signal output end are connected in series in sequence. One end of the shielding element is used to connect to the power supply common network, and the other end of the shielding element is connected between the detection contact and the measuring element. The capacitive touch detection method first needs to generate an isolation driving signal through the isolation driving module, and output the isolation driving signal through the first driving external connection end and the second driving external connection end. Further, in response to a touch operation on the detection contact when the target object is in the target environment, generate a touch signal through the touch detection branch corresponding to the detection contact. In this way, it is possible to improve the applicability and also have a good performance in the recognition accuracy.

[0025] The additional aspects and advantages of the present application will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1Schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application;

[0028] Figure 2 Another schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application;

[0029] Figure 3 Another schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application;

[0030] Figure 4 Another schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application;

[0031] Figure 5 Another schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application;

[0032] Figure 6 Another schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application;

[0033] Figure 7 Another schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application;

[0034] Figure 8 Another schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application;

[0035] Figure 9 Another schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application;

[0036] Figure 10 Another schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application;

[0037] Figure 11 Another schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application;

[0038] Figure 12 Another schematic diagram of the principle of the capacitance touch detection device provided by the embodiment of the present application. Detailed implementation manners

[0039] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0040] In the description of the present application, the meaning of "several" is one or more, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0041] In the description of the present application, it should be understood that when it comes to orientation descriptions, such as the orientations or position relationships indicated by "upper", "lower", "left", "right", "front", "rear", etc., they are based on the orientations or position relationships shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0042] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means 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 expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0043] In the description of the present application, it should be noted that unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution. In addition, the identification of specific steps hereinafter does not represent a limitation on the step sequence and execution logic. The execution sequence and execution logic between each step should be understood and inferred with reference to the content described in the embodiments.

[0044] In the related art, although capacitive touch detection technology has been widely used in various devices due to its high precision, fast response, and multi-touch support, it has some technical problems. First of all, the related technology is vulnerable to environmental influences. Changes in environmental temperature and humidity, as well as water droplets and oil stains, etc. may cause changes in the contact capacitance, resulting in inaccurate touch or false touch. This is a significant problem for devices that need to work stably in various environments. Especially in outdoor or dusty and humid environments, this instability may seriously affect the user experience and device safety.

[0045] Secondly, the related technologies are not applicable to large-screen devices. For large-sized multi-touch screens, a large number of scans are required to complete a full screen refresh, which not only increases power consumption but also may lead to different RC delays for contacts at different positions due to the resistance differences of ITO materials, thereby affecting the accuracy of touch signals. This limitation poses challenges to capacitive touch technology in multi-touch of large-screen devices, especially in application scenarios that require fast response.

[0046] Finally, it is difficult to recognize touches when wearing insulating gloves in the related technologies. In winter outdoors or in specific working environments, the target objects need to wear gloves to operate the device, and the existing capacitive touch detection technologies cannot effectively recognize touches when wearing gloves, which limits their application in specific occasions.

[0047] In summary, the technical problems faced by the current capacitive touch detection technologies mainly include poor environmental adaptability, inapplicability to large-screen devices, and decreased recognition ability when wearing insulating gloves. These problems limit the application scope of the capacitive touch detection technologies and affect the user experience. Therefore, the present application provides a new capacitive touch detection method that can overcome these problems and provide more stable and adaptable touch detection and recognition accuracy.

[0048] This application aims to solve at least one of the technical problems existing in the related technologies. For this purpose, the present application proposes a capacitive touch detection device and a touch detection method, which can not only improve applicability but also have good performance in recognition accuracy.

[0049] The following will be further described with reference to the accompanying drawings.

[0050] Referring to Figure 1 , the capacitive touch detection device according to an embodiment of the present application may include:

[0051] An isolation driving module, including a signal driving unit, a first driving external connection end, and a second driving external connection end. The first driving external connection end is used to connect to a power supply common network, and the second driving external connection end is used to be externally connected to a target environment. Among them, the signal driving unit is used to form an isolation driving signal and output the isolation driving signal through the first driving external connection end and the second driving external connection end;

[0052] It should be noted that in the capacitive touch detection device of the embodiment of the present application, the isolation driving module plays a crucial role. It is composed of a signal driving unit, a first driving external connection end, and a second driving external connection end.

[0053] The signal driving unit is responsible for generating isolated driving signals. In some embodiments, the signal driving unit may include a transformer, and the primary coil of the transformer is connected to a signal source. Among them, the primary coil of the transformer receives an input signal from the signal source. When current passes through the primary coil, a changing magnetic field will be generated, and this changing magnetic field will induce a corresponding current in the secondary coil, thereby generating an isolated driving signal at the output end of the transformer.

[0054] It is connected to the power supply common network through the first driving external terminal. This connection provides a reference potential for the isolated driving module and even the entire capacitive touch detection device, which is crucial for the accurate detection of touch signals.

[0055] The power supply common network provides necessary power for the entire capacitive touch detection device to ensure the normal operation of the isolated driving module and the touch detection branch.

[0056] The second driving external terminal, the isolated driving signal is directly or indirectly conducted to the target environment, where the target environment refers to the physical space where the target object performs a touch operation. The conduction of the isolated driving signal enables the touch detection branch to generate a touch signal when the target object touches the detection contact in the target environment.

[0057] At least one touch detection branch, the touch detection branch includes a detection contact, a measurement element, a shielding element, and a touch signal output end; the detection contact, the measurement element, and the touch signal output end are connected in series in sequence, one end of the shielding element is used to connect to the power supply common network, and the other end of the shielding element is connected between the detection contact and the measurement element; among them, the touch detection branch is used to detect the touch operation performed by the target object in the target environment and generate a touch signal according to the touch operation.

[0058] The detection contact is a contact for the target object to directly perform a touch operation. The measurement element is used to detect the touch signal generated after being touched through the detection contact, so as to identify the touch event. The shielding element is used to shield the touch signal of the detection contact it is connected to, enabling the detection of multiple contacts. One end of the shielding element is used to connect to the power supply common network, and the first driving external terminal of the isolated driving module is also used to connect to the power supply common network. This setting method aims to provide a detection current path for the isolated driving module and the touch detection branch of the capacitive touch detection device.

[0059] It should be noted that the power supply common network is a non-isolated power supply or ground for the circuit where the touch detection branch is located.

[0060] Refer to Figure 2 , according to some embodiments of the present application, the measurement element is a measurement switch, that is Figure 2 S1 in Figure 2 S2 in

[0061] It should be noted that the signal driving unit may include a transformer, that is, Figure 2 T1 in , and the primary coil of the transformer is connected to the signal source. Among them, the primary coil of the transformer receives an input signal from the signal source. When current passes through the primary coil, a changing magnetic field will be generated, and this changing magnetic field will induce a corresponding current in the secondary coil, thereby generating an isolation driving signal at the output end of the transformer. This isolation driving signal is guided to the second driving external terminal through the output end of the transformer and then conducted to the target environment.

[0062] In addition, the first driving external terminal can be connected to the ground wire. Similarly, one end of the shielding element can also be connected to the ground wire, that is, Figure 2 GND in . It should be noted that the first driving external terminal and the shielding element in the embodiments of the present application can specifically be connected to the power supply line or the ground wire.

[0063] In some embodiments of the present application, in the capacitive touch detection device of the embodiments of the present application, the cooperative operation of the measurement switch and the shielding switch is the key mechanism for realizing touch detection. The states of the measurement switch and the shielding switch directly affect the output and shielding of the touch signal, thereby determining the accuracy and reliability of touch detection.

[0064] When the measurement switch is closed and the shielding switch is open, the touch detection branch forms a complete current path. At this time, if the target object touches the touch detection contact in the target environment, the human body, as a conductor, will form a parasitic capacitance between the detection contact and the human body. The isolation driving signal forms a loop through this parasitic capacitance and the human body, generating a touch current. This touch current flows through the measurement switch. Since the measurement switch is closed, the current can pass through and generate a touch signal at both ends of the measurement switch. This touch signal is then transmitted to the touch signal output terminal for subsequent circuit processing to identify the touch event.

[0065] On the contrary, when the measurement switch is open and the shielding switch is closed, the current path of the touch detection branch is cut off by the low-impedance path where the shielding switch is located. Even if the target object touches the touch detection contact, since the measurement switch is open, the touch current cannot generate a touch signal at both ends of the measurement switch. At the same time, the shielding switch is closed, providing a low-impedance path for the touch current, causing the current to be guided to the ground wire, thereby shielding the touch signal. In this state, the touch detection branch does not respond to the touch operation, realizing effective shielding of the touch signal.

[0066] This design allows the capacitive touch detection device to output a touch signal when needed and shield the touch signal when not needed, providing a flexible touch detection control method. By precisely controlling the states of the measurement switch and the shielding switch, false touches and interference can be avoided, and the accuracy of touch detection can be improved. This mechanism is used to implement the multi-touch function. By independently controlling multiple touch detection branches, multiple touch points can be detected simultaneously, thereby gradually narrowing the detection range and improving the touch detection speed.

[0067] It can be seen that the capacitive touch detection device of the embodiment of the present application realizes precise control of the touch signal through the ingenious design of the measurement switch and the shielding switch, improving the performance and reliability of touch detection. This design not only improves the accuracy of touch detection, but also enhances the adaptability of the capacitive touch detection device to different environments, enabling it to provide a reliable touch detection function under various conditions.

[0068] In the capacitive touch detection device of some embodiments of the present application, the isolation driving module is responsible for generating an isolation driving signal and outputting it through the first driving external terminal and the second driving external terminal. When the target object is in the target environment and its finger touches the detection contact, a parasitic capacitance is formed between the finger and the contact, which is the basis of touch detection.

[0069] In the configuration where the measurement element and the shielding element are the measurement switch and the shielding switch respectively, the touch detection process is as follows:

[0070] When the measurement switch is closed and the shielding switch is open, the isolation driving signal forms a current loop through the open shielding switch, the parasitic capacitance between the finger and the contact, and the human body. In this loop, a touch current will be generated. It should be noted that although the shielding switch is open and its resistance is almost infinite, it can still form a loop, similar to the leakage current existing in products connected to 220V alternating current in daily life. Although this leakage current is weak, it is sufficient to form a touch signal. The touch current generates a touch signal with the same frequency as the isolation driving signal at both ends of the shielding switch. Therefore, the touch signal has the same frequency as the isolation driving signal. Among them, the magnitude of the touch signal depends on the touch current, and the magnitude of the touch current is determined by the parasitic capacitance, and the magnitude of the parasitic capacitance is determined by the contact area between the finger and the contact. Therefore, the larger the contact area between the finger and the contact, the stronger the generated touch signal, which can thus reflect the contact relationship between the finger and the contact.

[0071] In contrast, when the measurement switch is off and the shielding switch is on, the isolation drive signal forms a loop through the closed shielding switch, the parasitic capacitance between the finger and the contact, and the human body. However, at this time, the touch current cannot generate a touch signal across the shielding switch. Therefore, this contact is shielded and does not respond to touch operations. In addition, if there is no finger touching the contact, no parasitic capacitance will be formed, and regardless of the states of the measurement switch and the shielding switch, no touch signal will be generated because the current loop required to form a touch signal is lacking.

[0072] It should be clear that this design allows the capacitive touch detection device to selectively detect touch signals among multiple contacts, improving the flexibility and accuracy of detection. By controlling the states of the measurement switch and the shielding switch, touch detection of specific contacts can be achieved, or contacts that do not need to be detected can be shielded, thereby being able to perform well in terms of recognition accuracy on the basis of improving applicability.

[0073] The capacitive touch detection device of the embodiment of the present application shows its superiority in many aspects, enabling it to maintain high efficiency and accuracy in various application scenarios.

[0074] First of all, the capacitive touch detection device of the embodiment of the present application is not easily affected by the environment. Even when facing factors such as changes in environmental temperature and humidity, as well as water droplets and oil stains that may cause changes in contact capacitance, since these factors do not directly cause the generation of touch current, no touch signal will be generated. This makes the capacitive touch detection device of the embodiment of the present application not easily affected by environmental changes. This characteristic is particularly important for touch devices used in variable environments, ensuring the stability and reliability of touch detection.

[0075] Secondly, the present application also performs well in identifying touches with insulated gloves. Although the insulated gloves increase the dielectric thickness between the finger and the contact, a parasitic capacitance can still be generated and a touch current can be formed. Due to the high impedance of the shielding switch in the off state, even a small touch current can generate a touch signal. This is in contrast to the related technologies of self-capacitance and mutual-capacitance touch detection. In the related technologies, when wearing gloves, due to the increased distance between the finger and the contact caused by the insulating layer, the parasitic capacitance is small, and the capacitance change amount is extremely likely to be insufficient to trigger touch detection. In the embodiment of the present application, however, the human body is part of the drive signal loop, and even if the parasitic capacitance is small, a sufficient current loop can be generated to achieve touch detection.

[0076] It can be seen that the capacitive touch detection technology of the present application has significant advantages in terms of environmental adaptability and touch recognition when wearing insulated gloves. These characteristics make the capacitive touch detection device of the embodiment of the present application have a wide application prospect in modern touch screen technology.

[0077] Refer to Figure 3, according to some embodiments of the present application, the capacitive touch detection device further includes a plurality of touch detection branches, an array touch screen, and a touch screen signal output terminal; wherein, the plurality of touch detection branches includes a first number of row position detection branches;

[0078] The detection contacts of the first number of row position detection branches are arranged at preset row sorting positions in the array touch screen; wherein, the touch signal output terminals of each row position detection branch are commonly connected to the touch screen signal output terminal.

[0079] The detection switch of each touch detection branch is represented by S1, the shielding switch of each touch detection branch is represented by S2, and the signal driving unit may include a transformer, represented by T1.

[0080] In some embodiments of the present application, the design of the capacitive touch detection device is extended to the application of the array touch screen, which requires the capacitive touch detection device to be able to handle multi-touch operations. For this reason, the capacitive touch detection device includes a plurality of touch detection branches, which are organized into an array of rows and columns to cover the touch area of the entire touch screen. In Figure 3 it can be seen the layout of the plurality of touch detection branches, and each branch includes a detection contact, a measurement switch, a shielding switch, and a touch signal output terminal.

[0081] It should be noted that the detection contacts of the first number of row position detection branches are arranged at preset row sorting positions in the array touch screen, which means that each row position detection branch is responsible for detecting the touch operation of a row in the touch screen. When the target object touches the touch screen, the corresponding row position detection branch will detect the touch event and generate a touch signal. When the measurement switch closes and the shielding switch disconnects during the touch, it will allow current to flow through and generate a touch signal.

[0082] The touch signal output terminals of each row position detection branch are commonly connected to the touch screen signal output terminal, and such a design allows the touch signals of all rows to be centrally processed. When the touch signal is transmitted from the touch signal output terminal to the subsequent signal processing circuit, the embodiments of the present application can identify the touch position.

[0083] In addition, Figure 3 also shows an isolation driving module, which includes a transformer and two driving external terminals. The isolation driving signal is connected to the power supply common network through the first driving external terminal, while the second driving external terminal is connected to the target environment. This design ensures the accuracy and stability of the touch signal and can work reliably even in a complex electromagnetic environment.

[0084] It can be seen that the capacitive touch detection device according to the embodiments of the present application realizes accurate detection of touch operations on the array touch screen through the design of multiple touch detection branches. This design not only improves the performance of touch detection, but also enhances the adaptability of the capacitive touch detection device to different environments, enabling it to provide reliable touch detection functions under various conditions. Through the collaborative work of the row detection branches, the capacitive touch detection device can achieve multi-touch, meeting the requirements of modern touch screen devices.

[0085] Referring to Figure 4 , according to some embodiments of the present application, the multiple touch detection branches further include a second number of column detection branches. Figure 4 In

[0086] The detection contacts of the second number of column detection branches are set at the preset column sorting positions in the array touch screen; wherein, the touch signal output ends of each row detection branch and the touch signal output ends of each column detection branch are commonly connected to the touch screen signal output end.

[0087] It should be noted that in some embodiments where a multi-touch function is required, column detection branches can be added and arranged crosswise with the row detection branches to form a matrix, thereby realizing the detection of single-point touch.

[0088] In some embodiments of the present application, the design of the capacitive touch detection device is intended to support the single-touch function, which is achieved by adding a second number of column detection branches.

[0089] The detection contacts of the column detection branches are set at the preset column sorting positions in the array touch screen, which means that each column detection branch is responsible for detecting the touch operations in one column of the touch screen. When the target object touches the touch screen, the corresponding row detection branches and column detection branches will work together to detect the contact position.

[0090] The touch signal output ends of each row detection branch and the touch signal output ends of each column detection branch are commonly connected to the touch screen signal output end. Such a design allows the touch signals of all rows and columns to be centrally processed. When the touch signal is transmitted from the touch signal output end to the subsequent signal processing circuit, the embodiments of the present application can identify the touch position. The design of this matrix structure enables the capacitive touch detection device to achieve the single-touch function at an extremely high refresh rate.

[0091] In addition, the design of the isolation driving module ensures the accuracy and stability of the touch signal. The isolated driving signal is connected to the power supply common network through the first driving external terminal, while the second driving external terminal is connected to the target environment, providing a stable reference potential for the capacitive touch detection device. This design ensures the accuracy and stability of the touch signal, enabling reliable operation even in complex electromagnetic environments.

[0092] In summary, the capacitive touch detection device according to the embodiments of the present application realizes accurate detection of single-point touch operations on the array touch screen through the matrix structure design of the row and column detection branches. This design not only improves the performance of touch detection but also enhances the adaptability of the capacitive touch detection device to different environments, enabling it to provide reliable touch detection functions under various conditions. Through this matrix structure, the capacitive touch detection device can achieve single-point touch control, meeting the requirements of modern touch screen devices.

[0093] Referring to Figure 5 , according to some embodiments of the present application, the row arrangement positions include multiple sets of juxtaposed and parallel row arrangement sub-positions; wherein, the detection contacts of the row detection branches are sequentially arranged in each row arrangement sub-position.

[0094] In some embodiments of the present application, the row arrangement positions of the capacitive touch detection device are designed to include multiple sets of juxtaposed and parallel row arrangement sub-positions, as Figure 5 shown. Such a design in the embodiments of the present application allows the capacitive touch detection device to form the touch detection ability for multiple rows in the array touch screen. The detection contacts of the row detection branches are sequentially arranged in these row arrangement sub-positions, and each detection contact corresponds to a specific row arrangement sub-position, so that each row detection branch can independently detect the touch events on its corresponding row.

[0095] This design of multiple sets of juxtaposed and parallel row arrangement sub-positions makes the touch detection of the touch screen more detailed and accurate. When the target object performs a touch operation on the touch screen, the corresponding row detection branch will detect the touch event. Such a design ensures that each row detection branch can accurately detect the corresponding touch signal and can distinguish the touch events on different rows.

[0096] In addition, the touch signal output ends of each row detection branch are commonly connected to the touch screen signal output end. Such a design allows the touch signals of all rows to be centrally processed. When the touch signal is transmitted from the touch signal output end to the subsequent signal processing circuit, the embodiments of the present application can identify the touch position.

[0097] The design of the isolation drive module, including transformer T1, the first drive external terminal and the second drive external terminal, ensures the accuracy and stability of the touch signal. The isolated drive signal is connected to the power supply common network through the first drive external terminal, while the second drive external terminal is connected to the target environment. This design ensures the accuracy and stability of the touch signal and can work reliably even in a complex electromagnetic environment.

[0098] It can be seen that the capacitive touch detection device of the embodiment of the present application realizes accurate detection of the touch operation on the array touch screen through the design of multiple groups of juxtaposed and parallel row arrangement sub-positions. This design not only improves the performance of touch detection, but also enhances the adaptability of the capacitive touch detection device to different environments, enabling it to provide reliable touch detection functions under various conditions. In addition, this design also helps to optimize power consumption management and is applicable to large touch screens with high resolution and low power consumption.

[0099] It should be clear that the capacitive touch detection device of the embodiment of the present application is particularly suitable for large-screen devices. For example, for a multi-touch screen with m rows and n columns, an efficient algorithm such as the dichotomy method can be used to detect the touch signal. This method gradually narrows the detection range and finally accurately locates the touch point. Since the capacitive touch detection device of the embodiment of the present application can detect multiple touch points simultaneously, it significantly improves the screen refresh rate, and as the screen size increases, the increase in the number of scans and power consumption is almost negligible. In addition, since the disconnected shielding switch has an almost infinite impedance, even if the ITO resistance varies in the range of 3K to 30K, it will not affect the magnitude of the touch signal, which further proves the applicability of the present application in large-screen applications. Among them, the ITO resistance, that is, the indium tin oxide (Indium Tin Oxide) resistance, is a resistor made of indium tin oxide material. Indium tin oxide is a transparent conductive material with good conductivity and optical transparency, so it is used as a material for detecting touch points in touch screen technology.

[0100] According to some embodiments of the present application, there are various choices for the measurement element and the shielding element.

[0101] In some embodiments, when the measurement element is a measurement switch and the shielding element is a shielding switch, the measurement switch can specifically be an NMOS switch or a PMOS switch, and the shielding switch is an NMOS switch or a PMOS switch.

[0102] Refer to Figure 6 , both the measurement element S1 and the shielding element S2 in the capacitive touch detection device can use NMOS or PMOS switches, and the specific selection depends on the design requirements and circuit characteristics. In Figure 6In the two configurations of (a) and (b), whether using dual NMOS or dual PMOS switches, the forward connection of the body diodes allows current to flow in only one direction. This means that when a finger touches the contact, the generated touch signal will be detected only during the period when the current can flow, that is, the positive or negative period. This unidirectional flow characteristic can simplify the circuit design because only the current changes in one direction need to be considered.

[0103] Figure 6 Configuration (c) shows dual NMOS switches with the body diodes reverse-connected, which results in both bidirectional currents being blocked. In this configuration, the touch signal exists in both the positive and negative periods, and the amplitude is greatly attenuated. However, the amplitude of the touch signal can be increased by enhancing the drive signal, thereby improving the performance of touch detection.

[0104] In Figure 6 Configuration (d), the combination of NMOS and PMOS makes the body diodes forward-connected, also allowing only unidirectional current to flow. However, different from (a) and (b), this configuration allows the touch signal to be detected during the negative period. This design can meet different requirements for touch signal detection, or to adapt to specific circuit layouts and performance needs.

[0105] Generally speaking, Figure 6 The different configurations in show the diverse design choices of the measurement element S1 and the shielding element S2 in the capacitive touch detection device. These choices affect the periodicity, amplitude of the touch signal, and the requirements for the drive signal. Through the types and connection methods of these switches, the performance of touch detection can be optimized to adapt to different application scenarios and performance requirements. These designs consider the simplification of the circuit, the stability of the signal, and the adaptability to environmental changes, thereby improving the overall performance and reliability of the capacitive touch detection device.

[0106] Referring to Figure 7 , according to some embodiments of the present application, the measurement element is a diode, and the shielding element is an NMOS switch or a PMOS switch.

[0107] As Figure 7 shown, the measurement element S1 of the capacitive touch detection device uses a diode, while the shielding element S2 uses an NMOS or PMOS switch. This design combines the unidirectional conductivity characteristic of the diode and the control ability of the MOS switch to achieve precise detection of the touch signal.

[0108] In Figure 7In the (a) and (b) configurations, the combination of the diode and the NMOS or PMOS switch enables the current to flow in only one direction. When a finger touches the contact, if the diode is forward-connected, the touch signal can be detected only during the period when the current can pass through the diode, that is, the positive period. This characteristic of unidirectional flow helps to simplify the circuit design because only the current changes in one direction need to be considered, and at the same time, it can also reduce the power consumption in the circuit.

[0109] Figure 7 Configuration (c) shows the combination of the diode and the NMOS switch, where the diode is reverse-connected. In this configuration, both bidirectional currents are blocked, and the touch signal exists in both the positive and negative periods, and the amplitude will be greatly weakened. However, the amplitude of the touch signal can be increased by enhancing the drive signal, thereby improving the performance of touch detection.

[0110] In Figure 7 Configuration (d), the combination of the diode and the PMOS switch also allows the current to flow unidirectionally, but this time the touch signal is detected during the negative period. This design can be applied to specific circuit layouts or performance requirements.

[0111] Generally speaking, Figure 7 The different configurations show diverse design choices of the measuring element and the shielding element in the capacitive touch detection device. These choices affect the periodicity, amplitude of the touch signal, and the requirements for the drive signal. By the types and connection methods of these elements, the performance of touch detection can be optimized to adapt to different application scenarios and performance requirements. These designs consider the simplification of the circuit, the stability of the signal, and the adaptability to environmental changes, thereby improving the overall performance and reliability of the capacitive touch detection device.

[0112] Referring to Figure 8 , according to some embodiments of the present application, the measuring element is a high-value resistor, and the shielding element is an NMOS switch or a PMOS switch.

[0113] As Figure 8 shown, the measuring element S1 of the capacitive touch detection device uses a high-value resistor, while the shielding element S2 uses an NMOS or PMOS switch. This design utilizes the current-limiting effect of the high-value resistor and the control ability of the MOS switch to achieve precise detection of the touch signal.

[0114] As Figure 8 shown, the measuring element S1, as a high-value resistor, combines with the shielding element S2 (NMOS or PMOS) to form a touch detection branch. In Figure 8In the (a) and (b) configurations, since the direction of the body diode is upward, this causes the current to flow unidirectionally. When a finger touches the contact, the touch signal can only be detected during the period when the current can pass through the body diode, that is, the positive period. This unidirectional flow characteristic helps to simplify the circuit design and may reduce the power consumption in the circuit.

[0115] In Figure 8 the (c) and (d) configurations, the direction of the body diode is downward, which also causes the current to flow unidirectionally. However, different from Figure 8 the (a) and (b) of Figure 8 the (c) and (d) configurations of

[0116] In the embodiments of the present application, the resistance value of the high-value resistor has a direct impact on the amplitude of the touch signal. The high resistance value can limit the passing current, thereby affecting the strength of the touch signal. When designing the touch detection branch, it is necessary to preset the resistance value of the high-value resistor. By using the high-value resistor with the preset resistance value, it is ensured that the touch signal is strong enough to be detected and will not be too large to affect the stability of the circuit.

[0117] Generally speaking, Figure 8 the different configurations in

[0118] show diverse design choices of the measuring element and the shielding element in the capacitive touch detection device. These choices affect the periodicity, amplitude of the touch signal, and the requirements for the driving signal. By carefully designing the types and connection methods of these elements, the performance of touch detection can be optimized to adapt to different application scenarios and performance requirements. These designs consider the simplification of the circuit, the stability of the signal, and the adaptability to environmental changes, thereby improving the overall performance and reliability of the capacitive touch detection device. Figure 9 Referring to

[0119] As Figure 9 shown, in some embodiments of the present application, the design of the capacitive touch detection device is simplified to only include one touch detection branch. This simplified configuration is suitable for products with fewer touch points, such as induction cookers, etc. In this design, the measuring element S1 is a wire, and the shielding element S2 can adopt different elements, including diodes or PMOS switches, to achieve the detection of touch signals.

[0120] As Figure 9As shown, when the measuring element S1 is a wire, it is directly connected to the contact and the touch signal output terminal, allowing current to flow when a touch occurs. The design of the shielding element S2 determines the direction of current flow and the periodicity of the touch signal.

[0121] In Figure 9 the (a) configuration, if the shielding element S2 is also a wire, then current can flow during both positive and negative cycles because there is no element restricting the direction of current flow. This results in the touch signal existing during both positive and negative cycles. At this time, the parasitic large resistance of the detection circuit to the ground forms the path of the current, which may affect the amplitude of the touch signal.

[0122] In Figure 9 the (b) configuration, if the shielding element S2 is a diode and its direction is downward, then it will only allow current to flow during the negative cycle because the one-way conductivity of the diode blocks the current flow during the positive cycle. In this configuration, the touch signal only exists during the negative cycle.

[0123] Figure 9 In the (c) configuration, if the shielding element S2 is a diode and its direction is upward, then it will only allow current to flow during the positive cycle, and the touch signal also only exists during the positive cycle. This design also utilizes the one-way conductivity of the diode to control the direction of current flow.

[0124] In Figure 9 the (d) configuration, if the shielding element S2 is a PMOS and the direction of its body diode is downward, then it will also only allow current to flow during the negative cycle. In this configuration, the PMOS does not need to conduct, and the one-way conductivity of its body diode is sufficient to control the direction of current flow, making the touch signal only exist during the negative cycle.

[0125] It should be understood that this simplified design of the touch detection branch, due to its simple structure and the absence of the need for special touch chips and touch software, is suitable for cost-sensitive or applications with simple touch function requirements. By reasonably selecting the measuring element and the shielding element, the detection performance of the touch signal can be optimized to ensure accurate detection of touch events within a specific cycle.

[0126] Referring to Figure 10 According to some embodiments of the present application, a first drive signal processing element is provided between the second drive external terminal and the power supply common network. The second drive external terminal is connected to one end of the first drive signal processing element, and the power supply common network is connected to the other end of the first drive signal processing element. According to some embodiments of the present application, a second drive signal processing element is provided between the first drive external terminal and the target environment.

[0127] It should be noted that by setting a first drive signal processing element between the second drive external connection end and the power supply common network, the processing and transmission of the isolated drive signal are optimized. This design allows for more precise control of the characteristics of the isolated drive signal, thereby improving the performance and stability of touch detection. In this configuration, the second drive external connection end is connected to one end of the first drive signal processing element, while the power supply common network is connected to the other end of the processing element. Such a connection method ensures that the isolated drive signal can be stably transmitted from the isolated drive module to the touch detection branch. The first drive signal processing element can include various electronic components, such as resistors, capacitors, diodes, or transistors, for regulating and stabilizing the isolated drive signal.

[0128] It should be pointed out that the functions of the first drive signal processing element can include filtering, voltage regulation, signal amplification, or shaping, etc., to ensure that the isolated drive signal maintains its required characteristics during transmission. For example, if the isolated drive signal requires a specific voltage level or waveform, the first drive signal processing element can adjust the signal to meet these requirements.

[0129] In addition, a second drive signal processing element is set between the first drive external connection end and the target environment, which may be used to further adjust or optimize the signal to meet the requirements of specific application scenarios. The second drive signal processing element may include diodes or capacitors for controlling the signal flow direction or storing charge, thereby affecting the signal waveform or time characteristics.

[0130] Through this design, the capacitive touch detection device can more effectively meet the touch detection requirements under different environmental conditions, improving the accuracy and reliability of touch signals. This design also helps to reduce power consumption because by precisely controlling signal processing, unnecessary energy consumption can be reduced.

[0131] Generally speaking, by introducing drive signal processing elements between the isolated drive module and the touch detection branch, the capacitive touch detection device of the embodiment of the present application provides a flexible and efficient solution to address the technical challenges in capacitive touch detection. This design not only improves the performance of touch detection but also enhances the adaptability of the device to different environments, enabling it to provide reliable touch detection functions under various conditions.

[0132] Refer to Figure 11 , according to some embodiments of the present application, the capacitive touch detection device can use diodes as the first drive signal processing element or the second drive signal processing element to optimize the characteristics and transmission efficiency of the isolated drive signal. In Figure 11 , four different configuration methods can be seen, and each method utilizes the unidirectional conductivity of the diode to control the signal flow direction, thereby adapting to different circuit design requirements.

[0133] InFigure 11 In the (a) configuration, a single diode is connected to the ground (GND) which serves as the power supply common network. This design allows the isolation drive signal to pass through the diode during the positive cycle, while the signal during the negative cycle is blocked. This configuration is suitable for application scenarios where touch signals need to be detected during specific cycles.

[0134] Figure 11 The (b) configuration shows the single diode connected to the target environment, which may involve connecting the other end of the diode to a reference potential such as the power supply ground or other nodes in the circuit. Such a design enables the isolation drive signal to pass through the diode during the negative cycle, while the signal during the positive cycle is blocked.

[0135] Figure 11 In the (c) configuration, two diodes are connected in an inverse manner, which means the anodes and cathodes of the two diodes are opposite. This configuration allows the isolation drive signal to pass through the diodes during both the positive and negative cycles, but in opposite directions. This design can be used for applications that need to detect touch signals during both cycles.

[0136] Finally, Figure 11 The (d) configuration shows the two diodes connected in a forward manner, which makes the anodes and cathodes of the two diodes in the same direction. In this configuration, the isolation drive signal can pass through the diodes during both the positive and negative cycles, and in the same flow direction. This design is suitable for applications that need to detect touch signals during both cycles and have specific requirements for the signal direction.

[0137] Through these different diode configurations, the capacitive touch detection device of the embodiments of the present application can flexibly adapt to different circuit designs and application requirements. The use of diodes not only improves the stability of the signal, but also helps to reduce unnecessary signal interference, thereby improving the accuracy and reliability of touch detection. In addition, this design helps to reduce power consumption because the diodes can block the current during the cycles when signal transmission is not required, reducing energy waste.

[0138] In summary, Figure 11 The different configurations in show the applications of diodes in capacitive touch detection devices. These configurations optimize signal processing by controlling the flow direction of the isolation drive signal, improving the performance and stability of touch detection. This design takes into account the simplification of the circuit, the stability of the signal, and the adaptability to environmental changes, thereby improving the overall performance and reliability of the capacitive touch detection device.

[0139] Referring to Figure 12 , several different configuration methods of the isolation drive module in the capacitive touch detection device are shown. Each configuration is designed to optimize the transmission and processing of the isolation drive signal to adapt to different application scenarios and improve the performance of touch detection.

[0140] In Figure 12 the (a) configuration, a single resistor is connected to the ground (GND) which serves as the power supply common network. This design allows the isolation drive signal to be transmitted to the touch detection branch through the resistor. The functions of the resistor may include current limiting, voltage division, or being part of signal processing. This configuration is simple and cost-effective, and is suitable for applications with low requirements for signal processing.

[0141] Figure 12 The (b) configuration shows a single capacitor connected to the target environment. The capacitor may be used here for filtering, signal stabilization, or as part of signal processing. The introduction of the capacitor can reduce high-frequency noise in the signal and improve signal stability, which is crucial for the accuracy of touch detection.

[0142] Figure 12 In the (c) configuration, a single inductor is connected to the ground (GND) which serves as the power supply common network. The functions of the inductor may include electromagnetic interference suppression, filtering, or being part of signal processing. The inductor can provide suppression of high-frequency noise while allowing low-frequency signals to pass through, which helps to improve the reliability of touch detection.

[0143] Finally, Figure 12 the (d) configuration shows a single NMOS connected to the ground (GND) which serves as the power supply common network. The NMOS, as a switching element, can control the turning on and off of the isolation drive signal. This configuration allows for more precise control of signal transmission and may be used in application scenarios that require precise timing control.

[0144] It should be understood that Figure 12 these configuration methods demonstrate the flexibility and diversity of the isolation drive module in the capacitive touch detection device. By reasonably selecting and configuring resistors, capacitors, inductors, or NMOS, the characteristics of the isolation drive signal can be optimized to meet the requirements of specific applications. These designs consider circuit simplification, signal stability, and adaptability to environmental changes, thus improving the overall performance and reliability of the capacitive touch detection device. Through these different configurations, the capacitive touch detection device can adapt to a wider range of application scenarios, including environments with different requirements for signal quality.

[0145] According to the capacitive touch detection method of an embodiment of the present application, which is applied to the capacitive touch detection device of any one of the embodiments of the first aspect, the capacitive touch detection device includes an isolation drive module and at least one touch detection branch. The first drive external connection end of the isolation drive module is externally connected to the target environment, the second drive external connection end of the isolation drive module is connected to the power supply common network, and one end of the shielding element in the touch detection branch is connected to the power supply common network. The capacitive touch detection method may include:

[0146] Generate an isolated drive signal through the isolation drive module, and output the isolated drive signal through the first drive external terminal and the second drive external terminal;

[0147] In response to a touch operation on the detection contact when the target object is in the target environment, generate a touch signal through the touch detection branch corresponding to the detection contact.

[0148] In some embodiments, generate an isolated drive signal through the isolation drive module, and output the isolated drive signal through the first drive external terminal and the second drive external terminal;

[0149] The generation of the isolated drive signal can utilize a transformer, whose primary coil is connected to the signal source. When current flows through the primary coil, a changing magnetic field is generated around it. This changing magnetic field induces a corresponding current in the secondary coil of the transformer, thereby forming an isolated drive signal at the output. This design utilizes the principle of electromagnetic induction to achieve effective signal isolation and reduce the impact of external electromagnetic interference on touch detection.

[0150] The function of the first drive external terminal is to conduct the isolated drive signal to the target environment, that is, the physical space where the target object may perform a touch operation. This conduction can be direct or indirect through capacitive coupling, etc. The output of the isolated drive signal enables the generation of a touch signal by the touch detection branch when the target object touches the detection contact in the target environment.

[0151] The second drive external terminal is connected to the power supply common network to provide a stable reference potential for the isolation drive module. This connection method ensures the stable operation of the isolation drive module and also provides a unified potential reference for the entire capacitive touch detection device.

[0152] The design of outputting the isolated drive signal through the first drive external terminal and the second drive external terminal enables the capacitive touch detection device to work stably in various environments, improving the accuracy and stability of touch detection. This design not only enhances the adaptability of the device to different environments, but also reduces the interference of external factors on touch detection through the use of the isolated drive signal, thereby improving the overall performance of capacitive touch detection.

[0153] In some embodiments, in response to a touch operation on the detection contact when the target object is in the target environment, generate a touch signal through the touch detection branch corresponding to the detection contact.

[0154] When the finger of the target object touches the detection contact, the touch detection branch starts to work. This branch includes a detection contact, a measuring element, a shielding element, and a touch signal output terminal. The detection contact is the point directly contacted by the target object, which plays a triggering role in the touch operation. The measuring element, such as a high-value resistor, a diode, or a MOS switch, is used to detect the current change passing through the detection contact, thereby identifying the touch event. The shielding element is used to reduce external noise and interference, ensuring the purity of the touch signal.

[0155] The generation of the touch signal is achieved by detecting the change in the parasitic capacitance between the detection contact and the human body. When the finger touches the contact, a parasitic capacitance is formed between the human body and the contact, and the change in this capacitance will cause a change in current, thereby generating a touch signal at the touch signal output terminal. This touch signal is then transmitted to the subsequent signal processing circuit for identifying the touch event.

[0156] It can be seen that through the activation of the touch detection branch and the generation of the touch signal, the accurate detection of the touch operation is achieved. This method not only improves the performance of touch detection but also enhances the adaptability of the capacitive touch detection device to different environments, enabling it to provide reliable touch detection functions under various conditions.

[0157] It should be noted that all embodiments of this application are intended to illustrate the protection scope of the claims of this application and do not mean that each embodiment has superiority. That is to say, in the technical solutions to be protected by this application, even if some embodiments do not have special superiority, they can still implement the touch detection function mentioned in this application. Therefore, the embodiments of this application encompass various typical embodiments and variant embodiments of typical embodiments.

[0158] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of this disclosure and the above drawings are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this disclosure described here can be implemented in an order different from those illustrated or described here. In addition, the terms "include" and "comprise" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0159] It should be understood that in this disclosure, "at least one (item)" means one or more, and "a plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist at the same time. Here, A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. "At least one (one)" or a similar expression below means any combination of these items, including any combination of a single item (one) or plural items (ones). For example, at least one (one) of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or plural.

[0160] It should be understood that in the description of the embodiments of this application, the meaning of a plurality (or multiple items) is more than two. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number.

[0161] In several embodiments provided in this disclosure, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units is only a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection to each other can be through some interfaces, and the indirect coupling or communication connection of devices or units can be in an electrical, mechanical, or other form.

[0162] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0163] In addition, the functional units in each embodiment of this disclosure can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0164] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present disclosure, in essence, or the part that contributes to the related technology, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in various embodiments of the present disclosure. The aforementioned storage medium may include: various media such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs that can store program codes.

[0165] It should also be understood that the various embodiments provided in the embodiments of the present application can be combined arbitrarily to achieve different technical effects.

[0166] The above is a specific description of the embodiments of the present disclosure, but the present disclosure is not limited to the above embodiments. Those skilled in the art can also make various equivalent deformations or substitutions without departing from the spirit of the present disclosure, and these equivalent deformations or substitutions are all included within the scope defined by the claims of the present disclosure.

Claims

1. A capacitive touch detection device, characterized in that: include: An isolation driving module comprises a signal driving unit, a first driving external terminal and a second driving external terminal, wherein the first driving external terminal is used to connect to a power supply public network and is externally connected to a target environment, and the second driving external terminal is used to be externally connected to a target environment; wherein the signal driving unit is used to form an isolation driving signal and output the isolation driving signal through the first driving external terminal and the second driving external terminal; At least one touch detection branch, the touch detection branch includes a detection contact, a measuring element, a shielding element and a touch signal output terminal, the detection contact, the measuring element and the touch signal output terminal are connected in series in sequence, one end of the shielding element is used to connect to the power supply public network, and the other end of the shielding element is connected between the detection contact and the measuring element; wherein the touch detection branch is used to detect a touch operation performed by a target object when the target object is in the target environment, and generate a touch signal according to the touch operation.

2. The capacitive touch detection device according to claim 1, characterized in that: The measuring element is a measuring switch, and the shielding element is a shielding switch.

3. The capacitive touch detection device according to claim 2, characterized in that: The capacitive touch detection device further comprises a plurality of touch detection branches, an array touch screen and a touch screen signal output terminal; wherein the plurality of touch detection branches comprises a first number of row detection branches; The detection contacts of the first number of the row detection branches are arranged at preset row order positions in the array touch screen; wherein the touch signal output ends of the row detection branches are commonly connected to the touch screen signal output end.

4. The capacitive touch detection device according to claim 3, characterized in that: The plurality of touch detection branches further include a second number of row detection branches; The detection contacts of the second number of column-positioned detection branches are arranged at preset column sorting positions in the array touch screen; wherein the touch signal output end of each row-positioned detection branch and the touch signal output end of each column-positioned detection branch are commonly connected to the touch screen signal output end.

5. The capacitive touch detection device according to claim 3, characterized in that: The row arrangement positions include a plurality of groups of parallel row arrangement positions; wherein the detection contacts of the row detection branches are sequentially arranged at each of the row arrangement positions.

6. The capacitive touch detection device according to claim 2, characterized in that: The measuring switch includes an NMOS switch, a PMOS switch, a diode or a high-value resistor, and the shielding switch includes an NMOS switch or a PMOS switch.

7. The capacitive touch detection device according to claim 1, characterized in that: The capacitive touch detection device is provided with only one touch detection branch; wherein the measuring element is a wire, and the shielding element is a diode, a PMOS switch or an NMOS switch.

8. The capacitive touch detection device according to claim 1, characterized in that: A first driving signal processing element is provided between the first driving external terminal and the power supply public network. The first driving external terminal is connected to one end of the first driving signal processing element, and the power supply public network is connected to the other end of the first driving signal processing element.

9. The capacitive touch detection device according to claim 1, characterized in that: A second driving signal processing element is arranged between the second driving external terminal and the target environment.

10. A capacitive touch detection method, characterized in that: The capacitive touch detection device applied to any one of claims 1 to 9, the capacitive touch detection device comprising an isolation driving module and at least one touch detection branch, the first driving external terminal of the isolation driving module is connected to a power supply public network, the second driving external terminal of the isolation driving module is externally connected to a target environment, one end of a shielding element in the touch detection branch is connected to the power supply public network, and the method comprises: Generate an isolated driving signal through an isolated driving module, and output the isolated driving signal through the first driving external terminal and the second driving external terminal; In response to the target object performing a touch operation on the detection contact point when the target object is in the target environment, a touch signal is generated through the touch detection branch corresponding to the detection contact point.

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