Self-capacitance touch screen circuit anti-interference method and device, electronic equipment and storage medium

Abstract

The invention relates to a self-capacitance touch screen circuit anti-interference method and device, electronic equipment and a storage medium. The self-capacitance touch screen circuit anti-interference method comprises the steps that an interference signal oscillogram of an external signal source is collected, the interference signal oscillogram is analyzed and processed, and a plurality of frequency hopping points are generated; and acquiring a current interference frequency point of the external signal source, analyzing and processing the current interference frequency point, and taking any one of the plurality of frequency hopping frequency points as a current working frequency point. According to the scheme provided by the invention, the problem that the touch circuit is easily interfered can be solved, so that the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of self-capacitive touch screens, and in particular to a self-capacitive touch screen circuit anti-interference method, device, electronic equipment and storage medium. Background Art

[0002] At present, touch screens, as an input device for intelligent human-computer interaction interfaces, have been more widely used.

[0003] In the related art, the touch circuit of the self-capacitive touch screen is easily interfered, which leads to the problem of frequency hopping, thus affecting the user experience. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a self-capacitive touch screen circuit anti-interference method, device, electronic device and storage medium, which can solve the problem that the touch circuit is easily interfered with, thereby improving the user experience.

[0005] The objective of the present invention is achieved through the following technical solutions:

[0006] The first aspect of the present application provides an anti-interference method for a self-capacitive touch screen circuit, comprising: collecting an interference signal waveform diagram of an external signal source, analyzing and processing the interference signal waveform diagram, and generating multiple frequency hopping points; obtaining the current interference frequency point of the external signal source, analyzing and processing the current interference frequency point, and using any one of the multiple frequency hopping frequencies as the current working frequency point.

[0007] The analyzing and processing of the current interference frequency includes: comparing the interference frequency with the current working frequency and outputting a frequency difference; determining whether the frequency difference is within a preset threshold range, and if so, taking any one of the multiple frequency hopping frequencies as the current working frequency.

[0008] The method also includes: collecting an interference signal waveform of an external signal source, analyzing and processing the interference signal waveform to generate a first frequency hopping frequency and a second frequency hopping frequency; obtaining a current interference frequency of the external signal source, analyzing and processing the current interference frequency, and using any one of the first frequency hopping frequency and the second frequency hopping frequency as a current operating frequency.

[0009] The method also includes: collecting an interference signal waveform of an external signal source, analyzing and processing the interference signal waveform to generate a third frequency hopping frequency and a fourth frequency hopping frequency; obtaining a current interference frequency of the external signal source, analyzing and processing the current interference frequency, and taking any one of the third frequency hopping frequency and the fourth frequency hopping frequency as a current operating frequency.

[0010] The second aspect of the present application provides an anti-interference device for a self-capacitive touch screen circuit, comprising: an analysis module, used to collect an interference signal waveform of an external signal source, analyze and process the interference signal waveform, and generate multiple frequency hopping points; a jump module, used to obtain the current interference frequency point of the external signal source, analyze and process the current interference frequency point, and use any one of the multiple frequency hopping frequencies as the current working frequency point.

[0011] The jump module is also used to compare the interference frequency with the current working frequency and output a frequency difference; determine whether the frequency difference is within a preset threshold range, and if so, use any one of the multiple frequency hopping frequencies as the current working frequency.

[0012] The analysis module is also used to collect the interference signal waveform of the external signal source, analyze and process the interference signal waveform, and generate a first frequency hopping frequency and a second frequency hopping frequency; the jump module is also used to obtain the current interference frequency of the external signal source, analyze and process the current interference frequency, and use any one of the first frequency hopping frequency and the second frequency hopping frequency as the current working frequency.

[0013] The analysis module is also used to collect the interference signal waveform of the external signal source, analyze and process the interference signal waveform, and generate a third frequency hopping frequency and a fourth frequency hopping frequency; the jump module is also used to obtain the current interference frequency of the external signal source, analyze and process the current interference frequency, and use any one of the third frequency hopping frequency and the fourth frequency hopping frequency as the current working frequency.

[0014] A third aspect of the present application provides an electronic device, including:

[0015] Processor; and

[0016] The memory stores executable codes thereon, and when the executable codes are executed by the processor, the processor is caused to execute the method as described above.

[0017] A fourth aspect of the present application provides a computer-readable storage medium having executable code stored thereon. When the executable code is executed by a processor of an electronic device, the processor is caused to execute the method as described above.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] The present application sets multiple frequency hopping points according to the interference signal waveform of the external signal source. When encountering an interference frequency point, it can jump to the set frequency hopping frequency point, thereby preventing the touch circuit from being easily interfered. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below.

[0021] Figure 1 A method flow chart of a self-capacitive touch screen circuit anti-interference method in one embodiment of the present invention;

[0022] Figure 2 A method flow chart of another implementation of the anti-interference method of the self-capacitive touch screen circuit in one embodiment of the present invention;

[0023] Figure 3 A method flow chart of another implementation of the anti-interference method of the self-capacitive touch screen circuit in one embodiment of the present invention;

[0024] Figure 4 A method flow chart of another implementation of the anti-interference method of the self-capacitive touch screen circuit in one embodiment of the present invention;

[0025] Figure 5 A method flow chart of another implementation of the anti-interference method of the self-capacitive touch screen circuit in one embodiment of the present invention;

[0026] Figure 6 A method flow chart of another implementation of the anti-interference method of the self-capacitive touch screen circuit in one embodiment of the present invention;

[0027] Figure 7 A functional module diagram of a self-capacitive touch screen circuit anti-interference device in one embodiment of the present invention;

[0028] Figure 8 FIG. 4 is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0030] It should be understood that although the terms "first", "second", "third", etc. may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] At present, touch screens have been more widely used as an input device for intelligent human-computer interaction interfaces. In related technologies, the touch circuit of self-capacitive touch screens is easily interfered, which leads to frequency hopping problems, thus affecting the user experience.

[0033] In view of the above problems, the embodiments of the present application provide a self-capacitive touch screen circuit anti-interference method, device, electronic device and storage medium, which can solve the problem that the touch circuit is easily susceptible to interference, thereby improving the user experience.

[0034] The technical solution of the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0035] Figure 1 It is a flow chart of a self-capacitive touch screen circuit anti-interference method shown in an embodiment of the present application.

[0036] See also Figure 1 , a self-capacitive touch screen circuit anti-interference method, comprising:

[0037] Step S101: collect an interference signal waveform of an external signal source, analyze and process the interference signal waveform, and generate a plurality of frequency hopping points.

[0038] It should be noted that the external host computer starts sending test instructions, provides driving voltage to the chip on the FPC board, sends channel scanning electrical signals, and starts scanning the interference signal of the external signal source according to the host computer software acquisition to obtain the interference signal waveform. According to the interference signal waveform, set 2 or more frequency hopping points.

[0039] Step S102: obtaining the current interference frequency of the external signal source, analyzing and processing the current interference frequency, and taking any one of the multiple frequency hopping frequencies as the current working frequency.

[0040] It should be noted that when the current interference frequency is received, the chip will use any one of the multiple frequency hopping frequencies as the current working frequency to avoid the interference frequency so that the touch screen can operate normally.

[0041] See also Figure 2 , Figure 2 for Figure 1 In a more detailed implementation, a self-capacitive touch screen circuit anti-interference method includes:

[0042] Step S201: collect an interference signal waveform of an external signal source, analyze and process the interference signal waveform, and generate a plurality of frequency hopping points.

[0043] Please refer to step S101, which will not be described in detail here.

[0044] Step S202, obtain the current interference frequency of the external signal source, compare the interference frequency with the current working frequency, and output the frequency difference; determine whether the frequency difference is within a preset threshold range, and if so, use any one of the multiple frequency hopping frequencies as the current working frequency.

[0045] For example, the frequency hopping frequency can be 108KHz, 118KHz or 140KHz, and the current interference frequency can be 95KHz. When the difference between the frequency hopping frequency and the current interference frequency reaches the preset threshold range, the chip will use any one of the multiple frequency hopping frequencies as the current working frequency to avoid interference.

[0046] See also Figure 3 In one embodiment, a self-capacitive touch screen circuit anti-interference method further includes:

[0047] Step S301, collecting an interference signal waveform of an external signal source, analyzing and processing the interference signal waveform, and generating a first frequency hopping point and a second frequency hopping point;

[0048] Step S302: Acquire the current interference frequency of the external signal source, analyze and process the current interference frequency, and use any one of the first frequency hopping frequency and the second frequency hopping frequency as the current working frequency.

[0049] It should be noted that the first frequency hopping point and the second frequency hopping point are clean frequency hopping points, that is, these two frequency points are not interfered by external interference sources.

[0050] See also Figure 4In one embodiment, a self-capacitive touch screen circuit anti-interference method further includes:

[0051] Step S401, collecting an interference signal waveform of an external signal source, analyzing and processing the interference signal waveform, and generating a third frequency hopping point and a fourth frequency hopping point;

[0052] Step S402: Acquire the current interference frequency of the external signal source, analyze and process the current interference frequency, and use any one of the third frequency hopping frequency and the fourth frequency hopping frequency as the current working frequency.

[0053] It should be noted that the third frequency hopping point and the fourth frequency hopping point are clean frequency hopping points, that is, these two frequency points are not interfered by external interference sources.

[0054] See also Figure 5 In another embodiment, a self-capacitive touch screen circuit anti-interference method further includes:

[0055] Step S501: Acquire the current interference frequency of the external signal source, perform detection and processing on the environment where the current interference frequency is located, and output the environmental noise characteristics.

[0056] Step S502: compare the environmental noise feature with the preset noise feature, and use any one of the multiple frequency hopping frequencies as the current working frequency.

[0057] It should be noted that when the chip obtains the current interference frequency of the external signal source, it will detect the noise conditions of the environment where the current interference frequency is located to obtain the environmental noise characteristics. The environmental noise characteristics include information such as the frequency and intensity of the noise. In this way, it is possible to accurately determine whether the current interference frequency will affect the normal operation of the touch circuit, so that the chip can jump to the clean frequency in time to work.

[0058] See also Figure 6 In another embodiment, a self-capacitive touch screen circuit anti-interference method further includes:

[0059] Step S601, receiving an external signal source, converting a time domain signal in the external signal source into a frequency domain signal, and outputting a signal characteristic diagram;

[0060] Step S602: extract interference source information features from the signal characteristic diagram, wherein the interference source information features include the waveform of the signal source, the modulation mode of the signal source, the strength of the signal source and the direction information of the signal source; analyze and process the interference source information features and output an interference signal waveform diagram.

[0061] It is understandable that different signal sources have different effects on the chip touch circuit, so the frequency hopping point settings will also be different. Therefore, before the chip sets the frequency hopping point, it is necessary to accurately determine the type and characteristics of the external signal source.

[0062] Furthermore, the time domain signal in the external signal source is first converted into a frequency domain signal for representation, so that the distribution of the signal at different frequencies can be clearly seen, and a signal characteristic diagram can be obtained. For example, when analyzing the interference caused by a wireless communication device to a touch screen, the specific frequency band of the wireless device transmitting the signal, such as a Wi-Fi signal in the 2.4GHz frequency band, and the power distribution at different frequency points in the frequency band can be obtained, and then it can be determined whether it overlaps with the operating frequency of the touch screen, and the strength of the overlapping part.

[0063] Furthermore, the interference source information features in the signal characteristic diagram are extracted. This step mainly observes the signal waveform of the interference source and analyzes the shape, amplitude, period, rise time, fall time and other characteristics of the waveform. These time domain features can reflect some working characteristics of the interference source, such as whether it is pulse interference or continuous interference, and the frequency of interference. Specifically, if the interference is caused by the power switch, a periodic pulse waveform may be seen, and its period is related to the working cycle of the power switch.

[0064] Furthermore, based on the signal source strength, if the signal source strength is strong, it can be determined that the signal source is a charger or other device. Based on the signal source direction information, since some interference sources are omnidirectional, such as the signals of some wireless broadcasting stations, while some have specific directions, such as the signals of laser communication equipment. Finally, based on the signal source modulation method such as amplitude modulation, frequency modulation, and phase modulation, it can be determined that the interference source uses modulation technology, such as wireless communication equipment.

[0065] In summary, by analyzing the interference characteristics of the external signal source in advance, the clean frequency band can be accurately determined, so that the frequency hopping frequency can be calculated more quickly to better avoid interference to the touch screen.

[0066] Corresponding to the aforementioned application function implementation method embodiment, the present application also provides a self-capacitive touch screen circuit anti-interference device, electronic equipment and corresponding embodiments.

[0067] Figure 7 It is a functional module diagram of a self-capacitive touch screen circuit anti-interference device shown in an embodiment of the present application.

[0068] See also Figure 7, a self-capacitive touch screen circuit anti-interference device, including: an analysis module 100 and a jump module 200, the analysis module 100 is used to collect the interference signal waveform of the external signal source, analyze and process the interference signal waveform, and generate multiple frequency hopping points; the jump module 200 is used to obtain the current interference frequency point of the external signal source, analyze and process the current interference frequency point, and use any one of the multiple frequency hopping frequencies as the current working frequency point.

[0069] It should be noted that according to the scanning waveform, 15Khz, 89Khz, and 118Khz are selected as the current working frequencies. The working accuracy of each frequency is calculated as plus or minus 5KHz, that is, 15Khz, 89Khz, and 118Khz. And the normal working range of the touch screen is 10Khz~20Khz, 83Khz~94Khz, 113Khz~123Khz; if the current interference frequency happens to be within this range, the touch screen will jump randomly. At present, 5 or 10 clean frequencies are generally stored. The stored clean frequencies are set based on the calculation of the external noise scanned by the touch chip when it is just powered on. Finally, if all the stored clean frequencies are subject to strong interference and affect the normal operation of the touch chip, the touch chip will start the noise scanning mechanism and re-scan 5 clean frequencies with the least interference.

[0070] See also Figure 7 In one embodiment, the jump module 200 is also used to compare the interference frequency with the current working frequency and output the frequency difference; determine whether the frequency difference is within a preset threshold range, and if so, use any one of the multiple frequency hopping frequencies as the current working frequency.

[0071] See also Figure 7 In one embodiment, the analysis module 100 is also used to collect the interference signal waveform of the external signal source, analyze and process the interference signal waveform, and generate a first frequency hopping frequency and a second frequency hopping frequency; the jump module 200 is also used to obtain the current interference frequency of the external signal source, analyze and process the current interference frequency, and use any one of the first frequency hopping frequency and the second frequency hopping frequency as the current working frequency.

[0072] See also Figure 7 In one embodiment, the analysis module 100 is also used to collect the interference signal waveform of the external signal source, analyze and process the interference signal waveform, and generate a third frequency hopping frequency and a fourth frequency hopping frequency; the jump module 200 is also used to obtain the current interference frequency of the external signal source, analyze and process the current interference frequency, and use any one of the third frequency hopping frequency and the fourth frequency hopping frequency as the current working frequency.

[0073] Regarding the system in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated again here.

[0074] Figure 8 It is a schematic diagram of the structure of an electronic device shown in an embodiment of the present application.

[0075] See also Figure 8 , the electronic device 1000 includes a memory 1010 and a processor 1020 .

[0076] The processor 1020 may be a central processing unit (CPU), or an integrated circuit composed of other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. The general-purpose processor may be any conventional processor that can run the Linux kernel.

[0077] The memory 1010 may include various types of storage units, such as system memory, read-only memory (ROM), and permanent storage devices. Among them, ROM can store static data or instructions required by the processor 1020 or other modules of the computer. The permanent storage device may be a readable and writable storage device. The permanent storage device may be a non-volatile storage device that does not lose the stored instructions and data even after the computer is powered off. In some embodiments, the permanent storage device uses a large-capacity storage device (such as a magnetic or optical disk, flash memory) as a permanent storage device. In some other embodiments, the permanent storage device may be a removable storage device (such as a floppy disk, optical drive). The system memory may be a readable and writable storage device or a volatile readable and writable storage device, such as a dynamic random access memory. The system memory may store some or all instructions and data required by the processor at run time. In addition, the memory 1010 may include any combination of computer-readable storage media, including various types of semiconductor storage chips (such as DRAM, SRAM, SDRAM, flash memory, programmable read-only memory), and disks and / or optical disks may also be used. In some embodiments, the memory 1010 may include a readable and / or writable removable storage device, such as a laser disc (CD), a read-only digital versatile disc (such as a DVD-ROM, a double-layer DVD-ROM), a read-only Blu-ray disc, an ultra-density optical disc, a flash memory card (such as an SD card, a mini SD card, a Micro-SD card, etc.), a magnetic floppy disk, etc. The computer-readable storage medium does not include carrier waves and transient electronic signals transmitted wirelessly or wired.

[0078] The memory 1010 stores executable codes, and when the executable codes are processed by the processor 1020 , the processor 1020 can execute part or all of the methods described above.

[0079] In addition, the method according to the present application may also be implemented as a computer program or a computer program product, which includes computer program code instructions for executing some or all of the steps in the above method of the present application.

[0080] Alternatively, the present application can also be implemented as a computer-readable storage medium (or non-transitory machine-readable storage medium or machine-readable storage medium) on which executable code (or computer program or computer instruction code) is stored. When the executable code (or computer program or computer instruction code) is executed by a processor of an electronic device (or server, etc.), the processor executes part or all of the steps of the above-mentioned method according to the present application.

[0081] The scheme of the present application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of the various embodiments have their own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. Those skilled in the art should also be aware that the actions and modules involved in the specification are not necessarily required for the present application. In addition, it can be understood that the steps in the method of the embodiment of the present application can be adjusted in order, merged and deleted according to actual needs, and the modules in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0082] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A self-capacitive touch screen circuit anti-interference method, characterized in that: include: Collecting an interference signal waveform of an external signal source, analyzing and processing the interference signal waveform to generate a plurality of frequency hopping frequency points; The current interference frequency of the external signal source is obtained, the current interference frequency is analyzed and processed, and any one of the multiple frequency hopping frequencies is used as the current working frequency.

2. The anti-interference method of the self-capacitive touch screen circuit according to claim 1, characterized in that: The analyzing and processing the current interference frequency point includes: Compare the interference frequency with the current operating frequency, and output a frequency difference; It is determined whether the frequency difference is within a preset threshold range. If so, any one of the multiple frequency hopping frequencies is used as the current working frequency.

3. The anti-interference method of the self-capacitive touch screen circuit according to claim 1, characterized in that: The method further comprises: The interference signal waveform diagram of the external signal source is collected, and the interference signal waveform diagram is analyzed and processed to generate a first frequency hopping frequency point and a second frequency hopping frequency point; A current interference frequency of the external signal source is obtained, the current interference frequency is analyzed and processed, and any one of the first frequency hopping frequency and the second frequency hopping frequency is used as a current working frequency.

4. The self-capacitive touch screen circuit anti-interference method according to claim 1, characterized in that: The method further comprises: The interference signal waveform diagram of the external signal source is collected, and the interference signal waveform diagram is analyzed and processed to generate a third frequency hopping point and a fourth frequency hopping point; The current interference frequency of the external signal source is obtained, the current interference frequency is analyzed and processed, and any one of the third frequency hopping frequency and the fourth frequency hopping frequency is used as the current working frequency.

5. A self-capacitive touch screen circuit anti-interference device, characterized in that: include: An analysis module is used to collect an interference signal waveform diagram of an external signal source, analyze and process the interference signal waveform diagram, and generate multiple frequency hopping frequency points; The hopping module is used to obtain the current interference frequency of the external signal source, analyze and process the current interference frequency, and use any one of the multiple frequency hopping frequencies as the current working frequency.

6. The self-capacitive touch screen circuit anti-interference device according to claim 5, characterized in that: The jump module is also used to compare the interference frequency with the current working frequency and output a frequency difference; It is determined whether the frequency difference is within a preset threshold range. If so, any one of the multiple frequency hopping frequencies is used as the current working frequency.

7. The self-capacitive touch screen circuit anti-interference device according to claim 5, characterized in that: The analysis module is also used for collecting the interference signal waveform of the external signal source, analyzing and processing the interference signal waveform to generate the first frequency hopping point and the second frequency hopping point; The jump module is further used to obtain the current interference frequency of the external signal source, analyze and process the current interference frequency, and use any one of the first frequency hopping frequency and the second frequency hopping frequency as the current working frequency.

8. The self-capacitive touch screen circuit anti-interference device according to claim 5, characterized in that: The analysis module is also used for collecting the interference signal waveform of the external signal source, analyzing and processing the interference signal waveform, and generating the third frequency hopping point and the fourth frequency hopping point; The jump module is further used to obtain the current interference frequency of the external signal source, analyze and process the current interference frequency, and use any one of the third frequency hopping frequency and the fourth frequency hopping frequency as the current working frequency.

9. An electronic device, characterized in that: include: processor; as well as A memory having executable codes stored thereon, which, when executed by the processor, causes the processor to execute the method according to any one of claims 1 to 4.

10. A computer-readable storage medium having executable codes stored thereon, which, when executed by a processor of an electronic device, causes the processor to execute the method according to any one of claims 1 to 4.

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