Touch screen screening method and system, electronic equipment and screening method thereof

Abstract

The invention provides a touch screen screening method and system, electronic equipment and a screening method thereof, and the method comprises the steps: obtaining a plurality of frames of capacitance value data of a touch screen under the influence of NFC equipment, and determining the maximum capacitance value in the capacitance value data; judging whether the maximum capacitance value is greater than a preset threshold value or not; if the maximum capacitance value is greater than a preset threshold value and the capacitance value data does not contain the long-strip-shaped data characteristics, judging that the touch screen is an abnormal touch screen; if the maximum capacitance value is larger than a preset threshold value and the capacitance value data contains long-strip-shaped data characteristics, filtering the capacitance value data, and when the filtered capacitance value data is still larger than the preset threshold value, judging that the touch screen is an abnormal touch screen; if the maximum capacitance value is smaller than the preset threshold value and the capacitance value data do not contain the long-strip-shaped data characteristics, the touch screen is directly judged to be a normal touch screen. According to the scheme, the touch screens with the jump point problem can be conveniently and accurately screened, and the touch screens, especially the touch screens at the jump point critical point, are prevented from being sold on the market.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of touch screen detection, in particular to a touch screen screening method and system, an electronic device and a screening method thereof. BACKGROUND

[0002] Currently, touch screens with jumping points are mainly screened by manual testing or passive testing, which has the problems of long screening time and poor effect, and cannot screen out touch screens with jumping points or jumping point risks, so that products with quality problems may flow out, which may cause impact on company reputation and economic losses. Therefore, a method for conveniently and accurately screening out touch screens with jumping points or jumping point risks is needed. SUMMARY

[0003] The present application aims to provide a touch screen screening method, system, electronic device and screening method thereof, to conveniently and accurately screen out touch screens with jumping points or jumping point risks, and to avoid such touch screens, especially touch screens at the jumping point critical value, from flowing out to the market.

[0004] The technical solutions provided by the present application are as follows: In a first aspect, the present application provides a touch screen screening method, comprising the steps of: obtaining a plurality of frame capacity value data of the touch screen under the influence of an NFC device, and determining a maximum capacity value in the capacity value data; determining whether the maximum capacity value is greater than a preset threshold value; if the maximum capacity value is greater than the preset threshold value and the capacity value data does not contain a long strip-shaped data feature, determining that the touch screen is an abnormal touch screen, the long strip-shaped data feature being that there is at least one first capacity value data group in the capacity value data that has a long strip-shaped trend, and the difference between the capacity value data of each node in the first capacity value data group and the capacity value data of other nodes is greater than a first preset value; if the maximum capacity value is greater than the preset threshold value and the capacity value data contains a long strip-shaped data feature, performing filtering processing on the capacity value data, and if the capacity value data after filtering is still greater than the preset threshold value, determining that the touch screen is an abnormal touch screen; if the maximum capacity value is less than the preset threshold value and the capacity value data does not contain a long strip-shaped data feature, determining that the touch screen is a normal touch screen.

[0005] The application utilizes the influence of an NFC device on a touch screen to collect several frames of capacitance data of the touch screen under the influence of the NFC device. The change in field strength during NFC operation will cause a temporary change in the capacitance of the nodes of the touch screen, which is manifested as a trend change in the row and column data of the capacitance data. Therefore, the data characteristics of the collected capacitance data can be analyzed to determine whether the touch screen has a jump point phenomenon. When the maximum capacitance of the collected capacitance data is greater than a preset threshold value and the capacitance data does not contain a long strip-shaped data characteristic, the touch screen can be directly determined to be an abnormal touch screen. When the maximum capacitance of the collected capacitance data is greater than a preset threshold value and the capacitance data contains a long strip-shaped data characteristic, the capacitance data is filtered, and when the filtered capacitance data is still greater than the preset threshold value, the touch screen is determined to be an abnormal touch screen. When the maximum capacitance of the collected capacitance data is less than a preset threshold value and the capacitance data does not contain a long strip-shaped data characteristic, the touch screen is determined to be a normal touch screen. This scheme can conveniently and accurately screen touch screens with jump point problems, and touch screens at the critical point of the jump point can also be screened out, thereby avoiding the flow of such touch screens onto the market.

[0006] In some embodiments, further comprising: If the maximum capacitance is less than the preset threshold value and the capacitance data contains a long strip-shaped data characteristic, the capacitance data is filtered and reported. If the maximum capacitance is greater than the preset threshold value and the capacitance data contains a long strip-shaped data characteristic, the capacitance data is filtered, and further comprising: When the filtered capacitance data is less than the preset threshold value, the touch screen is determined to be a normal touch screen.

[0007] In some embodiments, after determining whether the maximum capacitance is greater than a preset threshold value, further comprising: If the maximum capacitance is greater than the preset threshold value and the capacitance data does not contain an inflection point type data characteristic, the touch screen is determined to be an abnormal touch screen. The inflection point type data characteristic is that there are at least one second capacitance data group on both sides of the corner of the upper or lower half of the touch screen, and the difference between the capacitance data of each node in the second capacitance data group and the capacitance data of other nodes is greater than a second preset value. If the maximum capacitance is greater than the preset threshold value and the capacitance data contains an inflection point type data characteristic, the capacitance data is filtered. When the filtered capacitance data is still greater than the preset threshold value, the touch screen is determined to be an abnormal touch screen. When the filtered capacitance data is less than the preset threshold value, the touch screen is determined to be a normal touch screen. If the maximum capacitance value is less than the preset threshold value and the capacitance data comprises inflection point type data characteristics, the capacitance data is filtered and reported. If the maximum capacitance value is less than the preset threshold value and the capacitance data does not comprise inflection point type data characteristics, it is determined that the touch screen is a normal touch screen.

[0008] In some embodiments, the touch screen and the NFC device are integrated, the positions of the nodes corresponding to the first capacitance data correspond to the positions of the NFC antenna; or, The NFC device is an external device, the positions of the nodes corresponding to the first capacitance data are positions of the NFC device close to the touch screen, and the distance between the NFC device and the touch screen is within a preset range during testing.

[0009] In some embodiments, before the capacitance data of the touch screen under the influence of the NFC device is obtained, the following steps are further included: The normal capacitance of the touch screen without the influence of the NFC device is obtained, and the capacitance value of 70-80% of the normal capacitance is taken as the preset threshold value.

[0010] In some embodiments, the NFC device is turned off, and the touch screen that cannot be restored to the normal capacitance is determined to be an abnormal touch screen.

[0011] In the second aspect, the application provides a touch screen screening system, comprising an NFC device and a processing terminal, the processing terminal screens the touch screen by the touch screen screening method of the first aspect.

[0012] In some embodiments, the NFC device is an external device, or the NFC device is a built-in device of an electronic device comprising the touch screen.

[0013] In the third aspect, the application provides an electronic device comprising a touch screen screened by the touch screen screening method of the first aspect.

[0014] In the fourth aspect, the application provides an electronic device screening method, the electronic device comprising a touch screen, the electronic device being screened by the touch screen screening method of the first aspect.

[0015] According to the touch screen screening method, system, electronic device and screening method thereof provided by the application, the influence of the NFC device on the touch screen is utilized, a plurality of frames of capacitance value data of the touch screen under the influence of the NFC device are collected, and the data characteristics of the collected capacitance value data are analyzed, so that it can be determined whether the touch screen has the jumping point phenomenon, thereby realizing convenient and accurate screening of the touch screen with the jumping point problem, and in particular, the touch screen at the jumping point critical point can also be screened out, so that the touch screen of this kind can be prevented from flowing out to the market. BRIEF DESCRIPTION OF DRAWINGS

[0016] The above-mentioned features, technical characteristics, advantages and implementation manners of the present application will be further described in the following preferred embodiments in a clear and understandable manner in combination with the drawings.

[0017] Figure 1 is a whole flowchart of an embodiment of the present application; Figure 2 is a flowchart of an embodiment of the present application; Figure 3 is a flowchart of another embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the specific embodiments of the present application will be described in combination with the drawings. Obviously, the drawings in the following description only represent some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0019] In order to make the drawings simple, only the parts related to the present application are shown in the drawings, and they do not represent the actual structure of the product. In addition, in order to make the drawings simple and easy to understand, in some drawings, only one of the parts with the same structure or function is shown, or only one of them is marked. In this text, "one" not only means "only one", but also means "more than one".

[0020] Touch screen jump point (also known as "screen jump") refers to the local out-of-control phenomenon of the touch screen device during operation, which is manifested as repeated triggering of the keys or mispositioning of the touch feedback. Some touch screens have the problem of jump point after long-term use, but some touch screens have the problem of jump point because the touch screen itself has defects or near defects, but the touch screen is not screened out when it is shipped. The existing method for screening touch screens with jump points mainly relies on manual testing screening or passive testing screening. These methods have the problems of long screening time and poor effect, and cannot screen out touch screens with possible jump points or jump point risks, so the products with quality problems may flow out, which may cause impact on the company's reputation and economic losses. Therefore, a method for more conveniently and accurately screening touch screens with jump points or jump point risks is needed.

[0021] The present scheme mainly determines whether the touch screen has a jump point risk by actively obtaining the capacitance value of the touch screen, and screens out touch screens with quality problems. The touch screen is an inductive display device that can receive input signals of a touch head (such as a finger or a stylus). The common touch screen is a capacitive touch screen. The capacitive touch screen works by human body conduction and electric field perturbation. When the human body finger approaches the touch screen, the capacitance value of the corresponding position below the touch screen changes, thereby determining the click position. However, when there is external interference, the capacitance value of some positions of the touch screen may also change. For example, when there is an NFC antenna around the touch screen, the capacitance value of each position (node) of the touch screen will also be affected. Considering that the existing smart devices containing the touch screen, such as mobile phones and POS machines, generally have an NFC module, the present application selects the NFC to actively affect the touch screen, and determines whether the touch screen has a jump point risk according to the capacitance value change of the touch screen. Of course, an external NFC device can also be selected to screen the touch screen. For example, before the touch screen is shipped, it does not contain other module structures (or does not contain an NFC module electronic device), and an external NFC device can be selected to screen the quality of the touch screen. When the touch screen is installed on an electronic device containing an NFC module, the NFC module of the device can be selected to screen the quality of the electronic device (touch screen).

[0022] Through the research on the influence of the NFC device on the touch screen, it is found that after the NFC device is turned on (the NFC device needs to be close to the touch screen), the touch screen screen channel area will be disturbed, the capacitance value of the touch screen (the node close to the NFC device) will show a trend of long strip data characteristics, or the data at the arc corner position on the left and right sides of the upper half of the screen (generally, the electronic device with an NFC module, such as a mobile phone, the NFC antenna is usually arranged on the upper half of the screen) is larger but the surrounding value is smaller, which is obviously different from hand touch, so the whole machine jump point is generally on the edge of the left and right sides of the upper half of the screen or the arc corner position on the left and right sides of the upper half of the screen.

[0023] The reason why NFC activation causes touchscreen jumps is that when NFC is enabled, changes in the field strength cause temporary changes in the capacitance of touchscreen nodes, which manifests as trending changes in row and column data or significant changes in the capacitance of individual nodes. When NFC is disabled, the field strength disappears, the capacitance of touchscreen nodes returns to normal, and the trending changes in row and column data disappear. Therefore, interference points can be filtered out based on the characteristics of the touchscreen capacitance data. This solution determines whether the capacitance change is caused by NFC or normal touch based on the characteristics of the touchscreen capacitance data. Abnormal touchscreens with obvious data problems can be directly filtered out, while abnormal data with risks can be filtered before being reported to the touchscreen. If the processed data is still greater than a preset threshold, the touchscreen is judged to be at risk of jumps and needs to be filtered out, thus achieving the screening of touchscreens at risk of jumps. The following is a detailed description of this solution with reference to the attached diagram: In one embodiment, refer to the appendix to the specification. Figure 1 and attached Figure 2 This application provides a touchscreen screening method, including the following steps: S100: Obtain several frames of tolerance data of the touch screen under the influence of the NFC device, and determine the maximum tolerance value in the tolerance data.

[0024] The NFC device can be the built-in NFC module of the electronic device with the touchscreen under test, or an external NFC device; this application makes no limitation on this. When using an external NFC device, the external NFC needs to be close to the touchscreen, for example, within 2 centimeters. When the external NFC device is far away, it will have a certain impact on the test data. During testing, the NFC device is turned on, and the capacitance values ​​of each node of the touchscreen will change due to the influence of the NFC. Several frames of capacitance value data of the touchscreen under the influence of the NFC device are collected. This application does not limit the specific number of frames; for example, 200 frames can be selected. In other embodiments, it can be adjusted according to the specific parameters of the touchscreen; this application makes no limitation on this. During data collection, since the touchscreen driver generally has integrated the test node, the `cat / proc / fts_test` command can be used directly to test, returning 200 frames of data. After obtaining several frames of capacitance value data, the capacitance value data is analyzed to determine the maximum capacitance value in the capacitance value data. This maximum capacitance value serves as the basis for subsequent comparison and judgment in this application.

[0025] S200. Determine whether the maximum capacity value is greater than a preset threshold.

[0026] This application introduces a preset threshold, which is a value customized based on touchscreen parameters and experience, and can be adjusted according to the actual scenario. In one specific implementation, before obtaining several frames of tolerance data of the touchscreen under the influence of the NFC device, the following steps are also included: Obtain the normal capacitance value of the touchscreen without the influence of NFC devices, and use 70%-80% of the normal capacitance value as the preset threshold.

[0027] Since the collected capacitance data is unfiltered, the preset threshold for the risk of touch screen jump points can be set to about 70%-80% of the normal capacitance value. If the threshold is set too high, close to the normal touch screen capacitance value, it is easy to cause misjudgment. For example, the normal capacitance value is 350, and the preset threshold can be set to 280.

[0028] S300. If the maximum capacitance value is greater than the preset threshold and the capacitance data does not contain the long strip data feature, the touch screen is determined to be an abnormal touch screen. The long strip data feature is that there is at least one first capacitance data group with a long strip trend in the capacitance data, and the difference between the capacitance data of each node in the first capacitance data group and the capacitance data of other nodes is greater than the first preset value.

[0029] When NFC is enabled, interference may occur in the channel area of ​​the screen near the NFC device. The capacitance value of the touchscreen may exhibit a trending elongated (or rectangular) data characteristic, or the data may be larger at the rounded corners on the upper half of the screen but smaller around the edges, showing a significant difference from hand touch. This application, after determining the relationship between the large capacitance value and a preset threshold, further analyzes the data characteristics of the capacitance value data. Analyzing the data characteristics of the capacitance value data is equivalent to analyzing whether the data possesses the aforementioned interference characteristics.

[0030] In one specific implementation, the data characteristics of the capacitance data include elongated (or rectangular) data characteristics. The elongated data characteristic is that there is at least one first capacitance data group exhibiting an elongated trend. The difference between the capacitance data of each node in the first capacitance data group and the capacitance data of other nodes is greater than a first preset value, meaning that the capacitance data of each node corresponding to the first capacitance data group is significantly higher than the capacitance data of nodes at other locations. This application does not limit the size of the first preset value; it only requires that it be possible to determine that the capacitance data of prominent nodes is significantly higher than the capacitance data of nodes at other locations. The elongated data characteristic is influenced by the NFC antenna. Therefore, when the touchscreen and NFC device are integrated, the positions of the nodes corresponding to the first capacitance data group correspond to the positions of the NFC antennas. When the NFC device is an external device, the positions of the nodes corresponding to the first capacitance data group are the positions of the NFC device close to the touchscreen, and the distance between the NFC device and the touchscreen is within a preset range during testing. When the touchscreen and NFC device are integrated into one structure, since the NFC antenna is usually installed in the upper half of the touchscreen, the nodes with long strip-shaped data features are generally located on the left and right edges of the upper half of the screen.

[0031] If the maximum capacitance value in the collected capacitance data is greater than the preset threshold and the capacitance data does not contain long strip data features, then the touch screen can be directly determined to be an abnormal touch screen.

[0032] S400. If the maximum capacitance value is greater than the preset threshold and the capacitance value data contains long strip data features, then the capacitance value data is filtered, and if the filtered capacitance value data is still greater than the preset threshold, the touch screen is determined to be an abnormal touch screen.

[0033] When the maximum capacitance value in the collected capacitance data exceeds a preset threshold and the capacitance data contains elongated data characteristics, it indicates that the touchscreen is affected by NFC. However, as mentioned earlier, capacitance changes caused by NFC are normal and do not necessarily mean the touchscreen is abnormal. This application will further evaluate the capacitance data by filtering it and comparing the filtered capacitance data with a preset threshold. If the filtered capacitance data is still greater than the preset threshold, the touchscreen is considered severely affected by NFC and is thus deemed abnormal. If the filtered capacitance data is less than the preset threshold, the touchscreen is considered normal because the data is only slightly larger due to NFC influence. In this solution, conventional filtering methods are used to filter the capacitance data; the aim is simply to eliminate the influence of NFC on the touchscreen capacitance data. This application does not impose any restrictions.

[0034] S500. If the maximum capacitance value is less than the preset threshold and the capacitance value data does not contain long strip data features, then the touch screen is determined to be a normal touch screen.

[0035] S600. If the maximum capacitance value is less than the preset threshold and the capacitance value data contains long strip data features, then the capacitance value data is filtered and reported.

[0036] If the maximum capacitance value in the collected capacitance data is less than the preset threshold and the capacitance data contains long bar-shaped data features, it indicates that the touch screen is less affected by NFC, but there is still a deviation. Therefore, the capacitance data needs to be filtered before data reporting.

[0037] This application utilizes the influence of NFC devices on touchscreens to collect several frames of capacitance data from the touchscreen under the influence of NFC devices. Since changes in the field strength during NFC operation cause temporary changes in the capacitance of touchscreen nodes, this manifests as a trend in the row and column data of the capacitance data. Therefore, by analyzing the data characteristics of the collected capacitance data, it is possible to determine whether the touchscreen is experiencing a jump-point phenomenon. When the maximum capacitance value of the collected capacitance data is greater than a preset threshold and the capacitance data does not contain elongated data features, the touchscreen can be directly identified as abnormal. When the maximum capacitance value of the collected capacitance data is greater than the preset threshold and the capacitance data contains elongated data features, the capacitance data is filtered. If the filtered capacitance data is still greater than the preset threshold, the touchscreen is still identified as abnormal. When the maximum capacitance value of the collected capacitance data is less than the preset threshold and the capacitance data does not contain elongated data features, the touchscreen is identified as normal. This solution enables convenient and accurate screening of touchscreens with jump-point problems, especially those at the jump-point threshold, thus preventing such touchscreens from entering the market.

[0038] In one embodiment, based on the foregoing embodiments, considering the influence of NFC, it is possible that the data at the left and right rounded corners of the upper half of the screen is larger, but the surrounding values ​​are smaller. Therefore, please refer to the appendix to the specification. Figure 3 After determining whether the maximum capacitance value is greater than a preset threshold, this application also includes: S310. If the maximum capacitance value is greater than the preset threshold and the capacitance value data does not contain inflection point data features, the touch screen is determined to be an abnormal touch screen. The inflection point data features are that there is at least one second capacitance value data group on both sides of the corner of the upper or lower half of the touch screen, and the difference between the capacitance value data of each node in the second capacitance value data group and the capacitance value data of other nodes is greater than the second preset value.

[0039] S410. If the maximum capacitance value is greater than the preset threshold and the capacitance value data contains inflection point data characteristics, then the capacitance value data is filtered; and if the filtered capacitance value data is still greater than the preset threshold, the touch screen is determined to be an abnormal touch screen; if the filtered capacitance value data is less than the preset threshold, the touch screen is determined to be a normal touch screen.

[0040] S510. If the maximum capacitance value is less than the preset threshold and the capacitance value data does not contain inflection point data characteristics, then the touch screen is determined to be a normal touch screen.

[0041] S610. If the maximum capacitance value is less than the preset threshold, and the capacitance value data contains inflection point data characteristics, then the capacitance value data is filtered and reported.

[0042] If the maximum capacitance value in the collected capacitance data is less than the preset threshold and the capacitance data contains inflection point data characteristics, it indicates that the touch screen is less affected by NFC, but there is still a deviation. Therefore, the capacitance data needs to be filtered before data reporting.

[0043] The inflection point data characteristic is that the difference between the capacitance value data of the nodes corresponding to the corners of the upper or lower half of the touchscreen and the capacitance value data of nodes at other locations is greater than a second preset value. In other words, the capacitance value data of the nodes corresponding to the corners of the upper or lower half of the touchscreen is significantly higher than the capacitance value data of nodes at other locations. This application does not limit the size of the second preset value; it only requires that it be possible to determine that the capacitance value data of the nodes corresponding to the corners of the upper or lower half of the touchscreen is significantly higher than the capacitance value data of nodes at other locations. The reason for the distinction between the upper and lower halves is due to the influence of the NFC antenna. Existing electronic devices containing NFC modules typically have their NFC antennas located in the upper half of the touchscreen, resulting in the capacitance value data of the nodes corresponding to the corners of the upper half being significantly higher than the capacitance value data of nodes at other locations. Conversely, if the NFC antenna of an electronic device containing an NFC module is located in the lower half of the touchscreen, then the capacitance value data of the nodes corresponding to the corners of the lower half will be significantly higher than the capacitance value data of nodes at other locations.

[0044] This application can directly determine that a touchscreen is abnormal when the maximum capacitance value in the collected capacitance data is greater than a preset threshold and the capacitance data does not contain inflection point data characteristics. When the maximum capacitance value in the collected capacitance data is greater than the preset threshold and the capacitance data contains inflection point data characteristics, this application will perform further judgment by filtering the capacitance data and comparing the filtered capacitance data with the preset threshold. If the filtered capacitance data is still greater than the preset threshold, it is determined that the touchscreen is severely affected by NFC and is therefore an abnormal touchscreen. If the filtered capacitance data is less than the preset threshold, it is determined that the touchscreen is only affected by NFC, causing the data to be too large, and is therefore a normal touchscreen. If the maximum capacitance value is less than the preset threshold and the capacitance data does not contain inflection point data characteristics, the touchscreen can be directly determined to be a normal touchscreen.

[0045] In one embodiment, based on the foregoing embodiments, the touchscreen screening method of this application further includes: turning off the NFC device and determining touchscreens that cannot be restored to normal tolerance as abnormal touchscreens.

[0046] In one embodiment, this application provides a touchscreen screening system, including an NFC device and a processing terminal. The processing terminal screens touchscreens using the touchscreen screening method described in the foregoing embodiments. The technical concept of this touchscreen screening system is the same as that of the touchscreen screening method described in the foregoing embodiments, and will not be repeated here.

[0047] In one specific implementation, the NFC device is an external device, or the NFC device is a built-in device of an electronic device that includes a touchscreen.

[0048] In this solution, the NFC device can be the built-in NFC module of the electronic device with the touchscreen under test, or an external NFC device can be used; this application makes no restriction. When using an external NFC device, the external NFC device needs to be close to the touchscreen, for example, the distance should be kept within 2 centimeters. When the external NFC device is too far away, it will have a certain impact on the test data.

[0049] In one embodiment, this application provides an electronic device including a touchscreen filtered by the touchscreen filtering method of the foregoing embodiments.

[0050] In one embodiment, this application provides a method for screening electronic devices, the electronic devices including touch screens, the electronic devices being screened using the touch screen screening method of the foregoing embodiments.

[0051] The screening method of this solution can be used not only for screening touch screens, but also for screening electronic devices containing touch screens. The touch screen screening method of the aforementioned embodiments can screen out electronic devices with touch screens that have a risk of skipping points, thereby preventing defective electronic devices from being released.

[0052] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A touch screen screening method, characterized by, The method comprises the steps of: acquiring a plurality of frame capacitance data of the touch screen under the influence of an NFC device, and determining a maximum capacitance in the capacitance data; judging whether the maximum capacitance is greater than a preset threshold value; if the maximum capacitance is greater than the preset threshold value and the capacitance data does not contain long strip-shaped data characteristics, determining that the touch screen is an abnormal touch screen, the long strip-shaped data characteristics being that there is at least one first capacitance data group in the capacitance data in a long strip-shaped trend, and the difference between the capacitance data of each node in the first capacitance data group and the capacitance data of other nodes is greater than a first preset value; if the maximum capacitance is greater than the preset threshold value and the capacitance data contains long strip-shaped data characteristics, performing filtering processing on the capacitance data, and when the filtered capacitance data is still greater than the preset threshold value, determining that the touch screen is an abnormal touch screen; if the maximum capacitance is less than the preset threshold value and the capacitance data does not contain long strip-shaped data characteristics, determining that the touch screen is a normal touch screen.

2. The touch screen screening method of claim 1, wherein, Further comprising: if the maximum capacitance is less than the preset threshold value and the capacitance data contains long strip-shaped data characteristics, performing filtering processing on the capacitance data and reporting data; if the maximum capacitance is greater than the preset threshold value and the capacitance data contains long strip-shaped data characteristics, performing filtering processing on the capacitance data, further comprising: when the filtered capacitance data is less than the preset threshold value, determining that the touch screen is a normal touch screen.

3. The touch screen screening method of claim 1, wherein, Further comprising after judging whether the maximum capacitance is greater than the preset threshold value: if the maximum capacitance is greater than the preset threshold value and the capacitance data does not contain inflection point type data characteristics, determining that the touch screen is an abnormal touch screen, the inflection point type data characteristics being that there is at least one second capacitance data group on both sides of a corner of an upper half or a lower half of the touch screen, and the difference between the capacitance data of each node in the second capacitance data group and the capacitance data of other nodes is greater than a second preset value; if the maximum capacitance is greater than the preset threshold value and the capacitance data contains inflection point type data characteristics, performing filtering processing on the capacitance data, and when the filtered capacitance data is still greater than the preset threshold value, determining that the touch screen is an abnormal touch screen; when the filtered capacitance data is less than the preset threshold value, determining that the touch screen is a normal touch screen; if the maximum capacitance is less than the preset threshold value and the capacitance data contains inflection point type data characteristics, performing filtering processing on the capacitance data and reporting data; if the maximum capacitance is less than the preset threshold value and the capacitance data does not contain inflection point type data characteristics, determining that the touch screen is a normal touch screen.

4. The touch screen screening method according to any one of claims 1 to 3, characterized in that, The touch screen and the NFC device are in an integrated structure, the positions of each node corresponding to the first capacitance data group correspond to the positions of an NFC antenna; or The NFC device is an external device, the positions of each node corresponding to the first capacitance data group are positions of the NFC device close to the touch screen, and the distance between the NFC device and the touch screen is within a preset range during testing.

5. The touch screen screening method according to any one of claims 1 to 3, wherein, The obtaining the capacitance data of the touch screen under the influence of the NFC device comprises: obtaining the normal capacitance of the touch screen without the influence of the NFC device, and setting the preset threshold value as 70%-80% of the normal capacitance.

6. The touch screen screening method of claim 5, wherein, Further comprising: closing the NFC device, and determining the touch screen that cannot restore to the normal capacitance as an abnormal touch screen.

7. A touch screen screening system characterized by, The processing terminal is screened by the touch screen screening method according to any one of claims 1-6.

8. The touch screen screening system of claim 7, wherein, The NFC device is an external device, or the NFC device is a self-provided device of an electronic device containing the touch screen.

9. An electronic device, comprising: The electronic device comprises a touch screen, and the electronic device is screened by the touch screen screening method according to any one of claims 1-6.

10. An electronic device screening method, characterized by, The electronic device comprises a touch screen, and the electronic device is screened by the touch screen screening method according to any one of claims 1-6.

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