CN103309529A - Capacitive touch screen and touch signal recognition method thereof - Google Patents
Capacitive touch screen and touch signal recognition method thereof Download PDFInfo
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- CN103309529A CN103309529A CN201210071484XA CN201210071484A CN103309529A CN 103309529 A CN103309529 A CN 103309529A CN 201210071484X A CN201210071484X A CN 201210071484XA CN 201210071484 A CN201210071484 A CN 201210071484A CN 103309529 A CN103309529 A CN 103309529A
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Abstract
The embodiment of the invention provides a capacitive touch screen and a touch signal recognition method thereof. Firstly, an optimum frequency band which satisfies preset conditions are selected from the current environment of the capacitive touch screen, the optimum frequency band is set to be the working frequency band of the capacitive touch screen, the capacitive touch screen can only receive signals or noises within the optimum frequency band and cannot receive noises within other ranges, and in other words, whether touch signals are received or not are judged according to the change of all-band frequency spectrums of the current environment of the capacitive touch screen. Substantially, judgment is made according to the change of signal and noise frequency spectrums within the optimum frequency band, so that the goal of improving the recognition rate of touch signals is achieved. By using the capacitive touch screen provided by the embodiment of the invention, the goal of improving the recognition rate of the touch signals can be achieved.
Description
Technical field
The present invention relates to the touch-screen field, in particular, relate to the method for a kind of capacitance touch screen and identification touch signal thereof.
Background technology
Along with the develop rapidly of touch-screen, capacitance touch screen has become requisite lifestyle device and working equipment.
The capacitance touch screen surfaces has particulate metal layer of layer of transparent, when finger touch is on this metal level, the electric capacity of touch point will change, thereby produced touch signal, capacitance touch screen judges whether to receive touch signal according to the variation of full frequency band frequency spectrum in the current environment at self place.
In the process that realizes the invention, the inventor finds that there is following shortcoming at least in prior art:
In actual applications, capacitance touch screen often and the LCD module use jointly, capacitance touch screen is powered by AC signal, fluorescent tube in the LCD module is also powered by AC signal, and the deflection voltage that needs during the rotation of the crystal molecule among the LCD is also produced by AC signal, and the electric field of these three AC signal is superimposed and will produces undesired signal; Also may there be neighbourhood noise in the environment at capacitance touch screen place, because when obtaining touch signal, it is the variation according to full range band frequency spectrum in the current environment at capacitance touch screen place, just according to the variation of undesired signal, neighbourhood noise and touch signal frequency spectrum, because touch signal is very faint signal, like this, may cause touch signal to be flooded by neighbourhood noise and undesired signal, can't correctly identify the consequence of touch signal.
Summary of the invention
In view of this, the invention provides the method for a kind of capacitance touch screen and identification touch signal thereof, flooded by neighbourhood noise and undesired signal owing to touch signal to overcome in the prior art, capacitance touch screen can't correctly be identified the problem of touch signal.
For achieving the above object, the invention provides following technical scheme:
A kind of method of capacitance touch screen identification touch signal, described method comprises:
Determine to satisfy pre-conditioned optimum frequency section in the current environment at capacitance touch screen place;
Described optimum frequency section is set to the frequency of operation section of described capacitance touch screen;
In described frequency of operation section, detect and whether receive described touch signal.
Wherein, satisfying pre-conditioned optimum frequency section in the current environment at described definite capacitance touch screen place comprises:
Full range band frequency spectrum in the current environment at capacitance touch screen place is sampled, obtain a plurality of sampling frequencys;
Obtain to satisfy described pre-conditioned optimum frequency section according to each sampling frequency.
Wherein, describedly obtain to satisfy described pre-conditioned optimum frequency section according to each sampling frequency and comprise:
At least two adjacent sampling frequencys are formed a frequency band, obtain at least two frequency bands;
Calculate the mean value of the sampling frequency in each frequency band;
Obtain to satisfy pre-conditioned optimum frequency section by the mean value that compares the sampling frequency in each frequency band.
Preferably, described pre-conditioned be sampling frequency mean value minimum.
Whether preferably, detect in described frequency of operation section and receive after the described touch signal step, described method also comprises:
When arriving at interval at the fixed time, calculate signal to noise ratio (S/N ratio); Described signal to noise ratio (S/N ratio) is the ratio of all signal energies of receiving in described optimum frequency section of energy and the described capacitance touch screen of the touch signal that receives;
Whether more current signal to noise ratio (S/N ratio) is lower than the signal to noise ratio (S/N ratio) that calculates when previous predetermined time interval arrives, if, then satisfy pre-conditioned frequency of operation section in the current environment at definite capacitance touch screen place again, if not, then described capacitance touch screen continues to detect whether receive described touch signal.
A kind of capacitance touch screen, described capacitance touch screen comprises:
Determination module is used for determining that the current environment at capacitance touch screen place satisfies pre-conditioned optimum frequency section;
Module is set, is used for the frequency of operation section that described optimum frequency section is set to described capacitance touch screen;
Detection module is used for detecting whether receive touch signal in described frequency of operation section.
Wherein, described determination module comprises:
Sampling unit is used for the current environment full range band frequency spectrum at capacitance touch screen place is sampled, and obtains a plurality of sampling frequencys;
Acquiring unit is used for obtaining to satisfy described pre-conditioned optimum frequency section according to each sampling frequency.
Wherein, described acquiring unit comprises:
Form subelement, be used at least two adjacent sampling frequencys are formed a frequency band, obtain at least two frequency bands;
Computation subunit is for the mean value that calculates the sampling frequency in each frequency band;
Obtain subelement, be used for obtaining to satisfy pre-conditioned optimum frequency section by the mean value that compares sampling frequency in each frequency band.
Preferably, described pre-conditioned be sampling frequency mean value minimum.
Preferably, described capacitance touch screen also comprises:
Computing module when being used for arriving at interval at the fixed time, calculates signal to noise ratio (S/N ratio); Described signal to noise ratio (S/N ratio) is the ratio of all signal energies of receiving in described optimum frequency section of energy and the described capacitance touch screen of the touch signal that receives;
Comparison module is used for more current signal to noise ratio (S/N ratio) and whether is lower than the signal to noise ratio (S/N ratio) that calculates when previous predetermined time interval arrives;
Trigger module, the comparative result that is used at described comparison module is under the situation that is, triggers described determination module, is under the situation that is at the comparative result of described comparison module, triggers described detection module.
A kind of electronic equipment comprises above-mentioned each described capacitance touch screen.
Via above-mentioned technical scheme as can be known, compared with prior art, the embodiment of the invention discloses a kind of method of capacitance touch screen identification touch signal, at first from the current environment at capacitance touch screen place, select to satisfy pre-conditioned optimum frequency section, and this optimum frequency section is set to the frequency of operation section of described capacitance touch screen, thus, capacitance touch screen can only be received in signal or the noise in the described optimum frequency section, noise in other scopes does not receive, the variation according to the current environment full range band frequency spectrum at capacitance touch screen place just judges whether to receive touch signal, be to judge according to the variation of signal and noise spectrum in this optimum frequency section in essence, thereby reached the purpose that improves the identification touch signal; Further, if described optimum frequency section does not have undesired signal and ambient noise signal, like this, capacitance touch screen detected signal in the optimum frequency section almost has only touch signal, thereby reaches the purpose of identifying touch signal more accurately.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiments of the invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to the accompanying drawing that provides.
Fig. 1 is the process flow diagram of the method for the disclosed first kind of capacitance touch screen identification of embodiment of the invention touch signal;
Fig. 2 is the process flow diagram of the method for the disclosed second kind of capacitance touch screen identification of embodiment of the invention touch signal;
Fig. 3 is the structural representation of the disclosed first kind of capacitance touch screen of the embodiment of the invention;
Fig. 4 is the result schematic diagram of the disclosed second kind of capacitance touch screen of the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Embodiment one
See also accompanying drawing 1, the method for the disclosed first kind of capacitance touch screen identification of embodiment of the invention touch signal comprises:
Step S101: determine to satisfy pre-conditioned optimum frequency section in the current environment at capacitance touch screen place;
In actual applications, capacitance touch screen often and the LCD module use jointly, capacitance touch screen is powered by AC signal, fluorescent tube in the LCD module is also powered by AC signal, and the deflection voltage that needs during the rotation of the crystal molecule among the LCD is also produced by AC signal, the electric field of these three AC signal is superimposed and will produces undesired signal, also may there be neighbourhood noise in the current environment at capacitance touch screen place, and full range band frequency spectrum may comprise in the current environment of described capacitance touch screen place: the neighbourhood noise frequency spectrum, undesired signal frequency spectrum and touch signal frequency spectrum.
Preferably, capacitance touch screen is execution in step S101 under situation about not touched by the people, because the full range band frequency spectrum in the current environment at capacitance touch screen place may comprise neighbourhood noise frequency spectrum and undesired signal frequency spectrum at this moment, the frequency spectrum that does not comprise touch signal, the optimum frequency section of Que Dinging is the most like this, certainly according to different actual conditions capacitance touch screens also can be under situation about being touched by the people execution in step S101.
Concrete, determine that the step that satisfies pre-conditioned optimum frequency section in the current environment at capacitance touch screen place comprises:
Full range band frequency spectrum in the current environment at capacitance touch screen place is sampled, obtain a plurality of sampling frequencys;
Obtain to satisfy pre-conditioned optimum frequency section according to each sampling frequency.
Preferably, before capacitance touch screen receives touch signal, just the user touches before the capacitance touch screen, the frequency spectrum that the full frame band frequency spectrum of surveying capacitance touch screen place environment earlier is noise spectrum and undesired signal, so, can survey the full range band frequency spectrum of current environment by the method for sampling, obtain a plurality of sampling frequencys by sampling, obtain to satisfy pre-conditioned optimum frequency section according to each sampling frequency.
Concrete, relatively each sampling frequency value obtain to satisfy pre-conditioned optimum frequency section implementation method can for:
At least two adjacent sampling frequencys are formed a frequency band, obtain at least two frequency bands; Wherein, there is not identical sampling frequency in each frequency band.
Calculate the mean value of the sampling frequency in each frequency band;
Obtain to satisfy pre-conditioned optimum frequency section by the mean value that compares in each frequency band.
Preferably, pre-conditionedly can be sampling frequency mean value minimum, just noise energy more weak frequency range relatively.
Step S102: the optimum frequency section is set to the frequency of operation section of capacitance touch screen;
Here, described frequency of operation section refers to capacitance touch screen used frequency band when detecting touch signal.
Preferably, the optimum frequency section is noise energy more weak frequency range relatively, like this, and when the user touches capacitance touch screen, capacitance touch screen only detects at touch signal, so just can avoid noise signal and undesired signal well to the influence of touch signal.
Step S103: in the frequency of operation section, detect whether receive touch signal.
The method of the capacitance touch screen identification touch signal that the embodiment of the invention provides select earlier to satisfy pre-conditioned optimum frequency section from the current environment at capacitance touch screen place, and this optimum frequency section is set to the frequency of operation section of described capacitance touch screen; Thus, capacitance touch screen can only be received in signal or the noise in the described optimum frequency section, noise in other scopes does not receive, the variation according to the current environment full frequency band frequency at capacitance touch screen place just judges whether to receive touch signal, be to judge according to the variation of signal and noise frequency in this optimum frequency section in essence, thereby reached the purpose that improves the identification touch signal.Further, if described optimum frequency section does not have undesired signal and ambient noise signal, like this, capacitance touch screen detection signal in optimum frequency almost has only touch signal, thereby reaches the purpose of identifying touch signal more accurately.
Embodiment two
See also Fig. 2, be the process flow diagram of the method for the disclosed second kind of capacitance touch screen identification of embodiment of the invention touch signal, this method comprises:
Step S201: determine to satisfy pre-conditioned optimum frequency section in the current environment at capacitance touch screen place;
Here, describedly pre-conditionedly can be the most weak frequency range of noise energy.
Step S202: the optimum frequency section is set to the frequency of operation section of capacitance touch screen;
Step S203: in the frequency of operation section, detect whether receive touch signal;
Step S204: calculate signal to noise ratio (S/N ratio) when arriving at interval at the fixed time;
Wherein, described signal to noise ratio (S/N ratio) is the ratio of all signal energies of receiving of energy and the capacitance touch screen of the touch signal that receives.
Step S205: whether more current signal to noise ratio (S/N ratio) is lower than the signal to noise ratio (S/N ratio) that calculates when previous predetermined time interval arrives, if, then return step S201, if not, then return step S203.
In the optimum frequency section of determining sometime, in other times optimum frequency section not necessarily.For example, 9 definite noise energies relatively more weak frequency range be that the optimum frequency section is 10KHz-50KHz, but increased some neighbourhood noises in the 10KHz-50KHz frequency range in the time of 9: 10 seconds, optimum frequency section at this moment is 10KHz-50KHz not necessarily just, may be 70KHz-100KHz.
The method of the capacitance touch screen identification touch signal that the embodiment of the invention provides, advantage among the embodiment one is not only arranged, but also judge whether the previous optimum frequency section of determining still is the optimum frequency section can arrive at interval at the fixed time the time in the current time, like this, will conform more in the variation of noise.
Embodiment three
Describe method in detail among the disclosed embodiment of the invention described above, can adopt the device of various ways to realize for method of the present invention, therefore the invention also discloses two kinds of devices, provide specific embodiment below and be elaborated.
See also Fig. 3, be the structural representation of the disclosed first kind of capacitance touch screen of the embodiment of the invention, this capacitance touch screen can comprise: determination module 301, module 302 and detection module 303 are set, wherein:
Acquiring unit 3012 can comprise: form subelement 30121, be used at least two adjacent sampling frequencys are formed a frequency band, obtain at least two frequency bands;
Obtain subelement 30123, be used for obtaining to satisfy pre-conditioned optimum frequency section according to the mean value in each frequency band; Preferably, described pre-conditioned be sampling frequency value minimum.
The capacitance touch screen that the embodiment of the invention provides, determine the optimum frequency section by determination module 301 earlier, by the frequency of operation section that module 302 these optimum frequency sections are set to described capacitance touch screen is set, capacitance touch screen can only be received in signal or the noise in the described optimum frequency section thus, noise in other scopes does not receive, detection module 303 judges whether to receive touch signal according to the variation of the current environment full frequency band frequency at capacitance touch screen place, be to judge according to the variation of signal and noise frequency in this optimum frequency section in essence, thereby reached the purpose that improves the identification touch signal.Further, if described optimum frequency section does not have undesired signal and ambient noise signal, like this, capacitance touch screen detection signal in optimum frequency almost has only touch signal, thereby reaches the purpose of identifying touch signal more accurately.
Embodiment four
See also Fig. 4, be the result schematic diagram of the disclosed second kind of capacitance touch screen of the embodiment of the invention, this capacitance touch screen can comprise:
Here, describedly pre-conditionedly can be the most weak frequency range of noise energy.
Computing module 401 when being used for arriving at interval at the fixed time, calculates signal to noise ratio (S/N ratio), and signal to noise ratio (S/N ratio) is the ratio of all signal energies of receiving of energy and the capacitance touch screen of the touch signal that receives;
Comparison module 402 is used for more current signal to noise ratio (S/N ratio) and whether is lower than the signal to noise ratio (S/N ratio) that calculates when previous predetermined time interval arrives;
Trigger module 403, the comparative result that is used at comparison module is under the situation that is, triggers determination module, is under the situation that is at the comparative result of comparison module, the detection trigger module.
In the optimum frequency section of determining sometime, in other times optimum frequency section not necessarily.For example, 9 definite noise energies relatively more weak frequency range be that the optimum frequency section is 10KHz-50KHz, but 9: point 0 10 seconds the time in the 10KHz-50KHz frequency range, increased some neighbourhood noises, at this moment optimum frequency section is 10KHz-50KHz not necessarily just, may be 70KHz-100KHz.
The capacitance touch screen that the embodiment of the invention provides, advantage among the embodiment three is not only arranged, and can also judge the previous optimum frequency section of determining by computing module 401, comparison module 402 and trigger module 403, in the current time, whether still be the optimum frequency section, like this, will conform more in the variation of noise.
The embodiment of the invention also provides a kind of electronic equipment, this electronic equipment comprises the described arbitrary capacitance touch screen of above-described embodiment, and is concrete, and described electronic equipment can be mobile phone, computer and PAD.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.
The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use the software module of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments herein.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (11)
1. the method for capacitance touch screen identification touch signal is characterized in that described method comprises:
Determine to satisfy pre-conditioned optimum frequency section in the current environment at capacitance touch screen place;
Described optimum frequency section is set to the frequency of operation section of described capacitance touch screen;
In described frequency of operation section, detect and whether receive described touch signal.
2. according to the described method of claim 1, it is characterized in that, satisfy pre-conditioned optimum frequency section in the current environment at described definite capacitance touch screen place and comprise:
Full range band frequency spectrum in the current environment at capacitance touch screen place is sampled, obtain a plurality of sampling frequencys;
Obtain to satisfy described pre-conditioned optimum frequency section according to each sampling frequency.
3. according to the described method of claim 2, it is characterized in that, describedly obtain to satisfy described pre-conditioned optimum frequency section according to each sampling frequency and comprise:
At least two adjacent sampling frequencys are formed a frequency band, obtain at least two frequency bands;
Calculate the mean value of the sampling frequency in each frequency band;
Obtain to satisfy pre-conditioned optimum frequency section by the mean value that compares the sampling frequency in each frequency band.
4. according to the described method of claim 3, it is characterized in that, described pre-conditioned be sampling frequency mean value minimum.
5. according to the described method of claim 1, it is characterized in that detect and whether receive after the described touch signal step, described method also comprises in described frequency of operation section:
When arriving at interval at the fixed time, calculate signal to noise ratio (S/N ratio); Described signal to noise ratio (S/N ratio) is the ratio of all signal energies of receiving in described optimum frequency section of energy and the described capacitance touch screen of the touch signal that receives;
Whether more current signal to noise ratio (S/N ratio) is lower than the signal to noise ratio (S/N ratio) that calculates when previous predetermined time interval arrives, if, then satisfy pre-conditioned frequency of operation section in the current environment at definite capacitance touch screen place again, if not, then described capacitance touch screen continues to detect whether receive described touch signal.
6. a capacitance touch screen is characterized in that, described capacitance touch screen comprises:
Determination module is used for determining that the current environment at capacitance touch screen place satisfies pre-conditioned optimum frequency section;
Module is set, is used for the frequency of operation section that described optimum frequency section is set to described capacitance touch screen;
Detection module is used for detecting whether receive touch signal in described frequency of operation section.
7. according to the described capacitance touch screen of claim 6, it is characterized in that described determination module comprises:
Sampling unit is used for the current environment full range band frequency spectrum at capacitance touch screen place is sampled, and obtains a plurality of sampling frequencys;
Acquiring unit is used for obtaining to satisfy described pre-conditioned optimum frequency section according to each sampling frequency.
8. according to the described capacitance touch screen of claim 7, it is characterized in that described acquiring unit comprises:
Form subelement, be used at least two adjacent sampling frequencys are formed a frequency band, obtain at least two frequency bands;
Computation subunit is for the mean value that calculates the sampling frequency in each frequency band;
Obtain subelement, be used for obtaining to satisfy pre-conditioned optimum frequency section by the mean value that compares sampling frequency in each frequency band.
9. described capacitance touch screen according to Claim 8 is characterized in that, described pre-conditioned be sampling frequency mean value minimum.
10. according to the described capacitance touch screen of claim 6, it is characterized in that described capacitance touch screen also comprises:
Computing module when being used for arriving at interval at the fixed time, calculates signal to noise ratio (S/N ratio); Described signal to noise ratio (S/N ratio) is the ratio of all signal energies of receiving in described optimum frequency section of energy and the described capacitance touch screen of the touch signal that receives;
Comparison module is used for more current signal to noise ratio (S/N ratio) and whether is lower than the signal to noise ratio (S/N ratio) that calculates when previous predetermined time interval arrives;
Trigger module, the comparative result that is used at described comparison module is under the situation that is, triggers described determination module, is under the situation that is at the comparative result of described comparison module, triggers described detection module.
11. an electronic equipment is characterized in that, comprises each described capacitance touch screen of 6-10.
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| CN201210071484.XA CN103309529B (en) | 2012-03-16 | 2012-03-16 | A kind of capacitance touch screen and the method identifying touch signal thereof |
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| CN201210071484.XA CN103309529B (en) | 2012-03-16 | 2012-03-16 | A kind of capacitance touch screen and the method identifying touch signal thereof |
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| CN104571732A (en) * | 2013-10-14 | 2015-04-29 | 深圳市汇顶科技股份有限公司 | Touch terminal and active touch pen detection method and system |
| CN104660024A (en) * | 2015-01-12 | 2015-05-27 | 友达光电股份有限公司 | Noise suppression method and voltage converter |
| WO2015109562A1 (en) * | 2014-01-26 | 2015-07-30 | 华为终端有限公司 | Interference suppression method and apparatus for touch screen and terminal device |
| CN105320319A (en) * | 2014-06-30 | 2016-02-10 | 晨星半导体股份有限公司 | Touch device and control method of touch electronic system |
| 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 |
| CN105677099A (en) * | 2016-01-05 | 2016-06-15 | 京东方科技集团股份有限公司 | Method and system for setting working frequency range of touch detection system |
| CN107506067A (en) * | 2017-07-24 | 2017-12-22 | 广东欧珀移动通信有限公司 | Working frequency adjustment method, device and the terminal device of touch-screen |
| CN109753174A (en) * | 2017-11-06 | 2019-05-14 | 中华映管股份有限公司 | Touch device and its touching signals processing method |
| WO2019127213A1 (en) * | 2017-12-28 | 2019-07-04 | 深圳市汇顶科技股份有限公司 | Noise eliminating circuit and touch device |
| CN114925014B (en) * | 2022-05-24 | 2024-03-26 | 深圳市爱协生科技股份有限公司 | Capacitive touch serial port screen capable of self-adapting to strong electric interference |
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| CN104571732A (en) * | 2013-10-14 | 2015-04-29 | 深圳市汇顶科技股份有限公司 | Touch terminal and active touch pen detection method and system |
| US9939975B2 (en) | 2013-10-14 | 2018-04-10 | Shenzhen GOODIX Technology Co., Ltd. | Determining touch terminal and active stylus target operating frequency according to noise information |
| WO2015109562A1 (en) * | 2014-01-26 | 2015-07-30 | 华为终端有限公司 | Interference suppression method and apparatus for touch screen and terminal device |
| US10459572B2 (en) | 2014-01-26 | 2019-10-29 | Huawei Device Co., Ltd. | Touchscreen interference suppression method and apparatus, and terminal device |
| CN105320319A (en) * | 2014-06-30 | 2016-02-10 | 晨星半导体股份有限公司 | Touch device and control method of touch electronic system |
| CN104660024A (en) * | 2015-01-12 | 2015-05-27 | 友达光电股份有限公司 | Noise suppression method and voltage converter |
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| 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 |
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| 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 |
| CN105528117B (en) * | 2016-01-28 | 2019-02-19 | 青岛海信移动通信技术股份有限公司 | A kind of acquisition methods and device of touch screen scan frequency |
| CN107506067A (en) * | 2017-07-24 | 2017-12-22 | 广东欧珀移动通信有限公司 | Working frequency adjustment method, device and the terminal device of touch-screen |
| CN109753174A (en) * | 2017-11-06 | 2019-05-14 | 中华映管股份有限公司 | Touch device and its touching signals processing method |
| WO2019127213A1 (en) * | 2017-12-28 | 2019-07-04 | 深圳市汇顶科技股份有限公司 | Noise eliminating circuit and touch device |
| CN114925014B (en) * | 2022-05-24 | 2024-03-26 | 深圳市爱协生科技股份有限公司 | Capacitive touch serial port screen capable of self-adapting to strong electric interference |
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