CN106681875B - Method and system for detecting power interference resistance of touch screen - Google Patents
Method and system for detecting power interference resistance of touch screen Download PDFInfo
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- CN106681875B CN106681875B CN201710085045.7A CN201710085045A CN106681875B CN 106681875 B CN106681875 B CN 106681875B CN 201710085045 A CN201710085045 A CN 201710085045A CN 106681875 B CN106681875 B CN 106681875B
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- 230000006698 induction Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000013523 data management Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2205—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested
- G06F11/2221—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested to test input/output devices or peripheral units
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2268—Logging of test results
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Abstract
The invention provides a method and a system for detecting power supply interference resistance of a touch screen, wherein the method for detecting the power supply interference resistance of the touch screen comprises the following steps: scanning the touch screen by a controllable power supply interference signal according to a preset scanning mode, wherein the preset scanning mode is that the touch screen is scanned sequentially according to the sequence of signal amplitude from small to large, and each scanning is performed sequentially from an initial frequency within a preset frequency range; and when the touch screen is detected to be incapable of working normally, recording the current signal amplitude and the current frequency of the controllable power supply interference signal. According to the method and the system for detecting the power supply interference resistance of the touch screen, the touch screen is scanned in the preset scanning mode, and when the touch screen is detected to be incapable of working normally, the current signal amplitude of the controllable power supply interference signal is recorded, wherein the current signal amplitude is the strength of the maximum power supply interference signal which can be borne by the touch screen.
Description
Technical Field
The invention relates to the technical field of touch control, in particular to a method and a system for detecting power supply interference resistance of a touch screen.
Background
With the continuous development of electronic and touch technologies, touch screens have been developed rapidly and become an indispensable part of people's life, and touch screens are also called touch screens or touch panels, which are induction display devices capable of receiving input signals such as contacts and are widely used in electronic devices.
In the prior art, the touch screen used at present often has the phenomena of touch failure or point error reporting and the like, the reason is that the working power supply of the touch screen can generate an interference signal, so that the touch screen is interfered, and then the touch function is influenced, the root cause is that the touch screen does not find a proper detection method to measure the power supply interference resistance of the touch screen when leaving the factory, so that the test of the power supply interference resistance cannot be carried out, so that the power supply interference resistance of the touch screen cannot be known, and further when the touch screen is used specifically, the proper working power supply cannot be adopted to supply power to the touch screen, and when the power supply exceeding the power supply interference resistance of the touch screen is adopted, the touch screen has the phenomena.
Disclosure of Invention
Therefore, the invention aims to provide a method and a system for detecting the power interference resistance of a touch screen so as to know the power interference resistance of the touch screen.
The method for detecting the power interference resistance of the touch screen according to the embodiment of the invention comprises the following steps:
scanning the touch screen by a controllable power supply interference signal according to a preset scanning mode, wherein the preset scanning mode is that the touch screen is scanned sequentially according to the sequence of signal amplitude from small to large, and each scanning is performed sequentially from an initial frequency within a preset frequency range;
and when the touch screen is detected to be incapable of working normally, recording the current signal amplitude and the current frequency of the controllable power supply interference signal.
In addition, the method for remedying the data management abnormality according to the above embodiment of the present invention may further have the following additional technical features:
after the step of recording the current signal amplitude and the current frequency of the controllable power supply interference signal when the touch screen is detected to be incapable of working normally, the method for detecting the power supply interference resistance of the touch screen further comprises the following steps:
scanning the touch screen by the controllable power supply interference signal of the current signal amplitude in the preset frequency range from the next frequency of the current frequency in sequence;
and recording the frequencies of all the controllable power supply interference signals of the current signal amplitude when the touch screen cannot work normally after the current frequency.
The step of detecting that the touch screen cannot work normally comprises the following steps:
acquiring click position information and corresponding induction position information of the touch screen;
and when the click position information is judged to be inconsistent with the induction position information, detecting that the touch screen cannot work normally.
And inputting the interference signal to the touch screen through a grounding network of the touch screen.
The preset frequency range is a value range of the working frequency of the touch screen.
The system for detecting the power interference resistance of the touch screen according to the embodiment of the invention comprises the following components:
the first signal scanning module is used for scanning the touch screen by the controllable power supply interference signal according to a preset scanning mode, wherein the preset scanning mode is that the touch screen is scanned sequentially according to the sequence of signal amplitude from small to large, and each scanning is performed sequentially from the initial frequency within a preset frequency range;
and the first recording module is used for recording the current signal amplitude and the current frequency of the controllable power supply interference signal when the touch screen is detected to be incapable of working normally.
In addition, the system for detecting the power interference resistance of the touch screen according to the above embodiment of the present invention may further have the following additional technical features:
the detection system for the power interference resistance of the touch screen further comprises:
the second signal scanning module is used for scanning the controllable power supply interference signal of the current signal amplitude on the touch screen in sequence from the next frequency of the current frequency within the preset frequency range;
and the second recording module is used for recording the frequencies of all the controllable power supply interference signals of the current signal amplitude when the touch screen cannot work normally after the current frequency.
The first signal scanning module and the second signal scanning module are respectively electrically connected with a grounding network of the touch screen, so that interference signals are input to the touch screen from the grounding network of the touch screen.
The preset frequency range is a value range of the working frequency of the touch screen.
According to the method and the system for detecting the power supply interference resistance of the touch screen, the touch screen is scanned by the controllable power supply interference signals according to a preset scanning mode, the preset scanning mode is that the touch screen is scanned in sequence from small to large according to the signal amplitude, the scanning is started from the initial frequency in a preset frequency range at each time, when the touch screen is detected to be incapable of working normally, the current signal amplitude of the controllable power supply interference signals is recorded, and the current signal amplitude recorded at the time is the strength of the maximum power supply interference signal which can be borne by the touch screen, namely the power supply interference resistance.
Drawings
Fig. 1 is a flowchart of a method for detecting power interference resistance of a touch screen according to a first embodiment of the present invention.
Fig. 2 is a flowchart for detecting that the touch screen is not working properly.
Fig. 3 is a flowchart of a method for detecting power interference resistance of a touch screen according to a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a system for detecting power interference resistance of a touch screen according to a first embodiment of the present invention.
Description of the main elements
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a flowchart of a method for detecting the power interference resistance of a touch screen according to a first embodiment of the present invention is shown, which includes steps S01 to S02.
And step S01, scanning the touch screen by the controllable power supply interference signal according to a preset scanning mode, wherein the preset scanning mode is that the touch screen is scanned sequentially according to the sequence of signal amplitude from small to large, and each scanning is performed sequentially from the initial frequency within a preset frequency range.
Step S01 is inputting a controllable power interference signal to the touch screen from the lowest signal amplitude, and sequentially increasing its frequency from large to small in the preset frequency range, so that the touch screen receives a scanning signal with a certain signal amplitude and a continuously increasing frequency, when the touch screen receives all the frequencies in the preset frequency range, the signal amplitude of the controllable power interference signal is increased by one level, and then the frequency is sequentially increased from large to small in the preset frequency range again. Wherein the lowest signal amplitude is a preset value, and the initial frequency is the minimum frequency in the preset frequency range.
The controllable power supply interference signal is a sine wave interference signal and is an interference signal simulating an actual working power supply signal of the touch screen. The controllable power supply interference signal can be generated through the function signal generator, the generation process is that the relevant parameters of the power supply interference signal are generated to the function signal generator, the function signal generator can imitate the power supply interference signal according to the parameters, and the function signal generator can control the frequency and the amplitude of the generated interference signal, so that the controllable power supply interference signal can be generated.
It can be understood that the interference signal will interfere with the touch screen only when the frequency is the same as or close to the operating frequency of the touch screen, but if the amplitude of the interference signal is weak, although the frequency of the interference signal is within the frequency range of the interference touch screen, the touch screen will not work normally, so the capability of the touch screen against power interference is mainly expressed in how large the amplitude of the interference signal can be.
Although the interference signal is at the same or similar working frequency of the touch screen
Therefore, the preset frequency range is the value range of the working frequency of the touch screen, the general value range of the working frequency of the touch screen is between 50KHz and 500KHz, and the working frequency of the touch screen can be set to any value of between 50KHz and 500 KHz.
It should be noted that the interference signal is input to the touch screen through the grounding network of the touch screen.
And step S02, when the touch screen is detected to be incapable of working normally, recording the current signal amplitude and the current frequency of the controllable power supply interference signal.
The step of detecting that the touch screen cannot normally operate may be implemented according to the flowchart in fig. 2, please refer to fig. 2, which shows a flowchart of detecting that the touch screen cannot normally operate, including steps S11 to S12.
And step S11, acquiring the click position information and the corresponding induction position information of the touch screen.
The click position information is position information clicked on the touch screen by a user, the induction position information is position information which is correspondingly induced after the click position information is obtained, and under the normal condition of the touch screen, the click position information is consistent with the induction position information.
And step S12, when the click position information is judged to be inconsistent with the induction position information, detecting that the touch screen cannot work normally.
It can be understood that when it is determined that the click position information is inconsistent with the sensing position information, it indicates that a phenomenon of a point jump or a point false alarm occurs on the touch screen, and the touch screen cannot normally operate.
It should be noted that, in the step S02, when it is detected that the touch screen cannot normally operate, the first time when it is detected that the touch screen cannot normally operate is when the click position information is inconsistent with the sensing position information.
It can be understood that the amplitude of the interference signal is proportional to the intensity, that is, the larger the amplitude of the interference signal is, the larger the intensity of the interference is, so that the current signal amplitude recorded in step S02 is the maximum capability of the touch screen to resist power interference, when the touch screen normally works, a power supply higher than the current signal amplitude can be avoided, so that the phenomenon that the touch screen cannot normally work can be avoided, and the current frequency when the touch screen cannot normally work is recorded in step S02, which indicates that the working frequency set by the touch screen is close to the current frequency, when the touch screen normally works, the power supply with the working frequency close to the current frequency can be avoided, and further the phenomenon that the touch screen cannot normally work can be avoided.
In summary, in the method for detecting the power interference resistance of the touch screen, the touch screen is scanned by the controllable power interference signal according to a preset scanning mode, the preset scanning mode is that the touch screen is scanned sequentially according to the sequence of the signal amplitudes from small to large, and the scanning starts sequentially from the initial frequency within a preset frequency range every time, when the touch screen is detected to be incapable of working normally, the current signal amplitude and the current frequency of the controllable power interference signal are recorded, and the current signal amplitude recorded at this time is the strength of the maximum power interference signal which can be borne by the touch screen, namely, the power interference resistance is obtained.
Referring to fig. 3, a flowchart of a method for detecting the power interference resistance of a touch screen according to a second embodiment of the present invention is shown, which includes steps S21 to S24.
And step S21, scanning the touch screen by the controllable power supply interference signal according to a preset scanning mode, wherein the preset scanning mode is that the touch screen is scanned sequentially according to the sequence of signal amplitude from small to large, and each scanning is performed sequentially from the initial frequency within a preset frequency range.
And step S22, when the touch screen is detected to be incapable of working normally, recording the current signal amplitude and the current frequency of the controllable power supply interference signal.
It can be understood that the current signal amplitude and the current frequency recorded in the step S22 are recorded when the touch screen is detected to be incapable of working normally for the first time, and the current signal amplitude is the strength of the maximum power interference signal that the touch screen can bear, so that the step S22 has completed detecting the power interference resistance of the touch screen, and since the interference signal interferes with the touch screen when being the same as or close to the working frequency of the touch screen, the step S22 only finds out a frequency that causes the phenomenon that the touch screen cannot work normally, that is, the current frequency, and therefore it is also necessary to find out other frequencies that cause the phenomenon that the touch screen cannot work normally within the preset frequency range.
And step S23, scanning the controllable power supply interference signal of the current signal amplitude on the touch screen sequentially from the next frequency of the current frequency within the preset frequency range.
In step S23, a controllable power supply interference signal with the current signal amplitude is input to the touch screen, and its power is gradually increased from the next frequency of the current frequency within the preset frequency range, so that the touch screen receives a scanning signal. The purpose of step S23 is to input the frequency in the preset frequency range to the touch screen from the current frequency to the later frequency at the current amplitude, that is, to continuously input the frequency that is not input in step S22 to the touch screen at the current amplitude, so as to obtain all the frequencies that generate interference on the touch screen in the preset frequency range except the current frequency.
And step S24, recording the frequencies of all the controllable power supply interference signals of the current signal amplitude when the touch screen cannot work normally after the current frequency.
In the method for detecting the power interference resistance of the touch screen in this embodiment, through step S21 to step S24, on the one hand, the interference resistance of the touch screen can be detected, that is, the interference resistance of the touch screen is the current amplitude, and on the other hand, all frequencies that will interfere with the touch screen within the preset frequency range can be detected, so that during normal use, when the touch screen normally works, a power source lower than the current signal amplitude can be used, thereby avoiding the phenomenon that the touch screen cannot normally work, and at the same time, avoiding the use of the frequencies recorded in step S22 and step S24, further avoiding the phenomenon that the touch screen cannot normally work.
Referring to fig. 4, a schematic structural diagram of a system 10 for detecting power interference resistance of a touch screen according to a first embodiment of the present invention is shown, and includes a first signal scanning module 11 and a first recording module 12.
The first signal scanning module 11 is electrically connected to the touch screen 20, and is configured to scan the touch screen 20 according to a preset scanning mode, where the preset scanning mode is sequentially performed on the touch screen 20 from small to large according to a signal amplitude, and each scanning is performed sequentially from an initial frequency within a preset frequency range.
The first recording module 12 is configured to record a current signal amplitude and a current frequency of the controllable power supply interference signal when it is detected that the touch screen 20 cannot work normally.
Further, the system 10 for detecting the power interference resistance of the touch screen further includes an obtaining module 13 and a detecting module 14.
The obtaining module 13 is electrically connected to the touch screen 20, and is configured to obtain click position information of the touch screen 20 and corresponding sensing position information.
The detection module 14 is electrically connected to the acquisition module 13 and the first recording module 12, and configured to detect that the touch screen 20 cannot normally operate when it is determined that the click position information is inconsistent with the sensing position information, and generate a signal to the first recording module 12 at the same time, so that the first recording module 12 records the current signal amplitude and the current frequency of the controllable power supply interference signal.
Further, the system 10 for detecting the power interference resistance of the touch screen further includes a second signal scanning module 15 and a second recording module 16.
The second signal scanning module 15 is electrically connected to the touch screen 20, and configured to scan the touch screen 20 sequentially from a next frequency of the current frequency within the preset frequency range by the controllable power supply interference signal of the current signal amplitude.
The second recording module 16 is electrically connected to the detecting module 14 and the second signal scanning module 15, and is configured to record the frequencies of all the controllable power supply interference signals of the current signal amplitude when the touch screen 20 cannot normally operate after the current frequency is detected.
Further, the first signal scanning module 11 and the second signal scanning module 15 are respectively electrically connected to a ground network of the touch screen 20, so that an interference signal is input to the touch screen 20 from the ground network of the touch screen 20.
Further, the preset frequency range is a value range of the operating frequency of the touch screen 20.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A method for detecting the power interference resistance of a touch screen is characterized by comprising the following steps:
scanning the touch screen by a controllable power supply interference signal according to a preset scanning mode, wherein the preset scanning mode is that the touch screen is scanned sequentially according to the sequence of signal amplitude from small to large, and each scanning is performed sequentially from an initial frequency within a preset frequency range;
when the touch screen is detected to be incapable of working normally, recording the current signal amplitude and the current frequency of the controllable power supply interference signal;
scanning the touch screen by the controllable power supply interference signal of the current signal amplitude in the preset frequency range from the next frequency of the current frequency in sequence;
recording the frequency of all the controllable power supply interference signals of the current signal amplitude when the touch screen cannot work normally after the current frequency;
the controllable power supply interference signal is a sine wave interference signal and is an interference signal simulating an actual working power supply signal of the touch screen.
2. The method for detecting the power interference resistance of the touch screen according to claim 1, wherein the step of detecting that the touch screen cannot work normally comprises:
acquiring click position information and corresponding induction position information of the touch screen;
and when the click position information is judged to be inconsistent with the induction position information, detecting that the touch screen cannot work normally.
3. The method for detecting the power interference resistance of the touch screen according to claim 1, wherein an interference signal is input to the touch screen through a grounding network of the touch screen.
4. The method for detecting the power interference resistance of the touch screen according to claim 1, wherein the preset frequency range is a value range of the working frequency of the touch screen.
5. A system for detecting the power interference resistance of a touch screen is characterized by comprising:
the first signal scanning module is used for scanning the touch screen by the controllable power supply interference signal according to a preset scanning mode, wherein the preset scanning mode is that the touch screen is scanned sequentially according to the sequence of signal amplitude from small to large, and each scanning is performed sequentially from the initial frequency within a preset frequency range;
the first recording module is used for recording the current signal amplitude and the current frequency of the controllable power supply interference signal when the touch screen is detected to be incapable of working normally;
wherein, the detection system of the anti power supply interference ability of touch-sensitive screen still includes:
the second signal scanning module is used for scanning the controllable power supply interference signal of the current signal amplitude on the touch screen in sequence from the next frequency of the current frequency within the preset frequency range;
the second recording module is used for recording the frequencies of all the controllable power supply interference signals of the current signal amplitude when the touch screen cannot work normally after the current frequency;
the controllable power supply interference signal is a sine wave interference signal and is an interference signal simulating an actual working power supply signal of the touch screen.
6. The system for detecting the power interference resistance of the touch screen according to claim 5, wherein: the detection system for the power interference resistance of the touch screen further comprises:
the acquisition module is used for acquiring click position information of the touch screen and corresponding induction position information;
and the detection module is used for detecting that the touch screen cannot work normally when the click position information is judged to be inconsistent with the induction position information.
7. The system for detecting the capability of a touch screen to resist power interference according to claim 6,
the first signal scanning module and the second signal scanning module are respectively electrically connected with a grounding network of the touch screen, so that interference signals are input to the touch screen from the grounding network of the touch screen.
8. The system for detecting the power interference resistance of the touch screen according to claim 5, wherein the preset frequency range is a value range of an operating frequency of the touch screen.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710085045.7A CN106681875B (en) | 2017-02-17 | 2017-02-17 | Method and system for detecting power interference resistance of touch screen |
| PCT/CN2017/103803 WO2018149141A1 (en) | 2017-02-17 | 2017-09-27 | Method and system for detecting anti-power interference capability of touch screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710085045.7A CN106681875B (en) | 2017-02-17 | 2017-02-17 | Method and system for detecting power interference resistance of touch screen |
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| CN106681875B true CN106681875B (en) | 2020-09-01 |
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| CN106681875B (en) * | 2017-02-17 | 2020-09-01 | 广州视源电子科技股份有限公司 | Method and system for detecting power interference resistance of touch screen |
| CN110927494B (en) * | 2019-12-05 | 2021-01-08 | 深圳市华检检测技术有限公司 | Anti-interference detection method, device, equipment and computer readable storage medium |
| CN111596801A (en) * | 2020-05-22 | 2020-08-28 | 江西优奕视界光电有限公司 | Touch screen power supply interference identification processing method |
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| CN105204684A (en) * | 2015-09-21 | 2015-12-30 | 京东方科技集团股份有限公司 | Touch screen driving frequency control method and device, and electronic equipment |
| CN105528117A (en) * | 2016-01-28 | 2016-04-27 | 青岛海信移动通信技术股份有限公司 | Method and device for acquiring scanning frequency of touch panel |
| CN106371683A (en) * | 2016-09-19 | 2017-02-01 | 广州视源电子科技股份有限公司 | TDR touch screen and touch positioning method |
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| CN102830837B (en) * | 2012-07-19 | 2016-01-27 | 深圳市汇顶科技股份有限公司 | A kind of noise suppressing method, system and touch terminal for touching detection |
| CN102841715B (en) * | 2012-08-09 | 2016-01-20 | 深圳市汇顶科技股份有限公司 | Capacitive touch screen, touch control terminal and anti-interference method thereof and system |
| US9195341B2 (en) * | 2014-02-14 | 2015-11-24 | Texas Instruments Incorporated | Touchscreen controller and method for charger noise reduction through noise shaping |
| CN105677099B (en) * | 2016-01-05 | 2018-09-21 | 京东方科技集团股份有限公司 | Method and system for the working frequency range for setting touch detecting system |
| CN106681875B (en) * | 2017-02-17 | 2020-09-01 | 广州视源电子科技股份有限公司 | Method and system for detecting power interference resistance of touch screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105204684A (en) * | 2015-09-21 | 2015-12-30 | 京东方科技集团股份有限公司 | Touch screen driving frequency control method and device, and electronic equipment |
| CN105528117A (en) * | 2016-01-28 | 2016-04-27 | 青岛海信移动通信技术股份有限公司 | Method and device for acquiring scanning frequency of touch panel |
| CN106371683A (en) * | 2016-09-19 | 2017-02-01 | 广州视源电子科技股份有限公司 | TDR touch screen and touch positioning method |
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| WO2018149141A1 (en) | 2018-08-23 |
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