CN102314277A - Anti-static method of capacitive touch screen and corresponding capacitive touch screen - Google Patents
Anti-static method of capacitive touch screen and corresponding capacitive touch screen Download PDFInfo
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- CN102314277A CN102314277A CN201110296709A CN201110296709A CN102314277A CN 102314277 A CN102314277 A CN 102314277A CN 201110296709 A CN201110296709 A CN 201110296709A CN 201110296709 A CN201110296709 A CN 201110296709A CN 102314277 A CN102314277 A CN 102314277A
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Abstract
The invention discloses an anti-static method of a capacitive touch screen and the corresponding capacitive touch screen, wherein the anti-static method comprises the steps that: first, the touch screen detects a touch event, and the position data which is generated by the touch event is scanned and read; then after a certain time T is delayed, the touch screen is re-scanned, and detects whether the touch event exists or nor; if the touch event does not exist, the touch event is marked as being triggered by static electricity by mistake; and otherwise, the touch event and the position data are sent to a baseband processor. The capacitive touch screen can filter the interference signals of the static electricity to the capacitive touch screen, so that the error touch screen trigger caused by the static electricity is prevented.
Description
Technical field
The present invention relates to the capacitive touch screen field, particularly a kind of anti-static method of capacitive touch screen and corresponding capacitive touch screen.
Background technology
Along with growing with each passing day of multimedia information inquiry; How People more and more speaks of touch-screen; Because touch-screen is not only applicable to the national conditions of Chinese multimedia information inquiry, and touch-screen have sturdy and durable, reaction velocity fast, save the space, be easy to many advantages such as interchange.Utilize this technology, the user needs only the icon or the literal that bump lightly on the display screen with finger and just can realize host service function, thereby makes man-machine interaction more simple and direct.Because the accurate positioning of capacitive touch screen, its range of application also more and more widely.
Yet, in the use of capacitive touch screen, because the equipment friction generates electric charge of finger or other touch mode capacitive touch-screens, thereby produced static, can be considered to touch-screen and be touched, thereby report trigger data to baseband chip, produce false triggering.And because the characteristics of capacitance touch screen cause being difficult to add ESD (static releases) protective device, main lean on when doing module the panel (panel) that touches upward the metal edge strip of interpolation ground connection protect.If the ground connection of metal edge strip is not carried out, protection effect will reduce greatly.Even and ground connection has been carried out, because the equivalent capacity of the panel of capacitance touch screen itself is very little, if electrostatic potential is higher, still can be mistaken as is that touch-screen is touched, thereby makes troubles to the user.
In view of this, a kind of antistatic technique that is used for capacitance touch screen need be provided.
Summary of the invention
Weak point in view of above-mentioned prior art; The object of the present invention is to provide a kind of anti-static method and corresponding capacitive touch screen of capacitive touch screen, using the problem that causes false triggering owing to static to solve capacitive touch screen of the prior art.
In order to achieve the above object, the present invention has taked following technical scheme:
A kind of anti-static method of capacitive touch screen wherein, may further comprise the steps:
S1, touch-screen detect touch event;
S2, scan and read the position data that touch event takes place;
S3, postpone certain time interval T after, rescan touch-screen, and detect whether there is touch event, as existing, then carry out step S4, otherwise, said touch event is labeled as the touch event of static false triggering;
S4, said touch event and position data are sent to BBP.
The anti-static method of described capacitive touch screen wherein, also comprises step S5, the said position data of baseband processor, the response touch event.
The anti-static method of described capacitive touch screen, wherein, said step S4, after said touch event is labeled as the touch event of static false triggering uploads to BBP, and BBP sends reset signal, makes touch-screen reset.
The anti-static method of described capacitive touch screen, wherein, the setting of the certain time interval T among the said step S3 is by the frequency decision of the sweep signal of touch-screen.
The anti-static method of described capacitive touch screen, wherein, said certain time interval T satisfies: 10 milliseconds of < < 20 milliseconds of T.
A kind of capacitive touch screen links to each other with BBP, wherein, comprising:
Touch panel is used for receiving touching and instructs;
The touch-screen control chip is used for according to touching instruction, the touch screen scanning panel, and the senses touch incident, and the result sent to BBP;
Said touch panel links to each other with BBP through the touch-screen control chip.
Described capacitive touch screen, wherein, said touch-screen control chip further comprises:
The one-time detection unit is used for the touch screen scanning panel, the senses touch incident;
Delay cell, be used for when detection behind touch event, postpone certain hour;
The secondary check unit is used for behind the delay units delay certain hour, touch screen scanning panel, senses touch incident.
Described capacitive touch screen, wherein, said BBP further comprises:
Judging unit is used for the touch event that the touch-screen control chip sends is judged, if the touch event of static false triggering then sends reset instruction to the touch-screen control chip, otherwise responds said touch event.
The anti-static method of capacitive touch screen provided by the invention and corresponding capacitive touch screen, wherein, said anti-static method may further comprise the steps: at first, touch-screen detects touch event, scans and read the position data that touch event takes place; Then, after the delay certain time interval T, rescan touch-screen, and detect whether there is touch event,, then said touch event is labeled as the touch event of static false triggering as not existing; Otherwise, said touch event and position data are sent to BBP.Through capacitive touch screen of the present invention can filtering static to the undesired signal of capacitance touch screen, the touch-screen false triggering of having avoided static to cause.
Description of drawings
Fig. 1 is the synoptic diagram of electrostatic pulse of the present invention.
Fig. 2 is the process flow diagram of the anti-static method of capacitive touch screen of the present invention.
Fig. 3 is the structured flowchart of capacitive touch screen of the present invention.
Embodiment
The invention provides a kind of anti-static method and corresponding capacitive touch screen of capacitive touch screen.For making the object of the invention, technical scheme and effect clearer, clear and definite, below with reference to accompanying drawing and give an actual example to further explain of the present invention.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Find that through experimental study the amplitude of static is bigger, big having thousands ofly lied prostrate tens kilovolts, but its peak value part duration is short, basically in nanosecond with interior through discharge for several times, form electrostatic pulse.This electrostatic pulse is exactly the undesired signal of static.When electrostatic pulse is discharged on the touch-screen, will be coupled on the touch panel, letting the touch-screen control chip think by mistake has touch on the touch panel, gather wrong data, thereby cause false triggering.
See also Fig. 1, Fig. 1 is the synoptic diagram of electrostatic pulse of the present invention.As shown in the figure, the main interference sections of static is in the time period of tens nanoseconds.If behind the time-delay 1-2 millisecond, the influence of electrostatic interference will be very little.
Based on above-mentioned principle, the invention provides a kind of anti-static method of capacitive touch screen, as shown in Figure 2, said method comprising the steps of:
S1, touch-screen detect touch event;
S2, scan and read the position data that touch event takes place;
S3, postpone certain time interval T after, rescan touch-screen, and detect whether there is touch event, as existing, then carry out step S4, otherwise, said touch event is labeled as the touch event of static false triggering;
S4, said touch event and position data are sent to BBP.
Do with regard to each step respectively below and specify:
Said step S1 is that touch-screen detects touch event, has promptly received touch signal on the touch panel, then, carries out step S2: scan and read the position data that touch event takes place; At this moment, we can't know that it still is the real touch instruction of user that time touch event is based on static.And we know: if normal the touch, during button, the interval of button generally can be less than 50 milliseconds continuously.And at present for touch-screen, sample rate and the velocity ratio that reports touch data be 250HZ just faster, and major part is just about 100HZ.That is to say minimum interval than touch-screen double sampling and reported data faster at 4 milliseconds, for most of touch-screen, at interval all can be about 10 milliseconds.And we know, behind the static time-delay 1-2 millisecond, the influence of electrostatic interference will be very little.
Therefore, can know that for normal staff touch action, after collecting touch data for the first time, time-delay 10-20 millisecond should be able to collect same touch data for the second time from last surface analysis.If the false triggering that static causes, if behind the time-delay 10-20 millisecond,, just gather for the second time less than touch data because static discharges.Simultaneously, according to whether collecting touch data for the second time, we can identify primary touch event is normal the touch or electrostatic interference
Based on this reason, we can carry out twice scanning, detect trigger event, and between twice scanning certain hour at interval.Be step S3 of the present invention: after postponing certain time interval T, rescan touch-screen, and detect whether there is touch event,, then carry out step S4 as existing, otherwise, said touch event is labeled as the touch event of static false triggering; If after promptly postponing certain time interval T; Still can collect touch data, we can conclude that just said touch event is normal touch, promptly carries out step S5 so; Said touch event and position data are sent to BBP, carry out subsequent treatment by BBP.
Further, the subsequent treatment of said BBP can comprise: step S5, the said position data of baseband processor, response touch event.
Further, in said step S4, after said touch event is labeled as the touch event of static false triggering, upload to BBP, BBP sends reset signal, makes touch-screen reset.Because if electrostatic interference, and electrostatic energy may destroy some registers in the touch-screen control chip when bigger, lets register be in nondeterministic statement, makes the work of touch-screen control chip undesired.In order to strengthen the antijamming capability of touch-screen control chip; When identifying when being the interference of static, through BBP output reset signal, the touch-screen control chip resets; Make its internal state revert to original state automatically, separate and destatic the nondeterministic statement that causes.
In addition, the size of the certain time interval T in said step S3 is by the frequency decision of the sweep signal of touch-screen.The touch-screen control chip of 100Hz for example, minimum is wanted 10 milliseconds.For the most of touch-screen control chips of compatibility, and fully consider the speed that destatics disturbing pulse and staff button, can select 20 milliseconds.
Please continue to consult Fig. 3, the present invention also provides a kind of capacitive touch screen 10 that links to each other with BBP 300, and it comprises: touch panel 100 and touch-screen control chip 200.Said touch panel 100 is used for receiving the touch instruction; Said touch-screen control chip 200 is used for according to touching instruction, touch screen scanning panel 100, and the senses touch incident, and the result sent to BBP 300; Said touch panel 100 links to each other with BBP 300 through touch-screen control chip 200.
Further, said touch-screen control chip further comprises: one-time detection unit, delay cell and secondary check unit; Wherein, said one-time detection unit is used for the touch screen scanning panel, the senses touch incident; Said delay cell be used for when detection behind touch event, postpone certain hour; Said secondary check unit is used for behind the delay units delay certain hour, touch screen scanning panel, senses touch incident.
In addition; Said BBP also can comprise a judging unit, is used for the touch event that the touch-screen control chip sends is judged, if the touch event of static false triggering; Then send reset instruction to the touch-screen control chip, otherwise respond said touch event.
In sum, the anti-static method of capacitive touch screen provided by the invention and corresponding capacitive touch screen, wherein, said anti-static method may further comprise the steps: at first, touch-screen detects touch event, scans and read the position data that touch event takes place; Then, after the delay certain time interval T, rescan touch-screen, and detect whether there is touch event,, then said touch event is labeled as the touch event of static false triggering as not existing; Otherwise, said touch event and position data are sent to BBP.Through capacitive touch screen of the present invention can filtering static to the undesired signal of capacitance touch screen, the touch-screen false triggering of having avoided static to cause.
It is understandable that, concerning those of ordinary skills, can be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, and all these changes or replacement all should belong to the protection domain of the appended claim of the present invention.
Claims (8)
1. the anti-static method of a capacitive touch screen is characterized in that, may further comprise the steps:
S1, touch-screen detect touch event;
S2, scan and read the position data that touch event takes place;
S3, postpone certain time interval T after, rescan touch-screen, and detect whether there is touch event, as existing, then carry out step S4, otherwise, said touch event is labeled as the touch event of static false triggering;
S4, said touch event and position data are sent to BBP.
2. the anti-static method of capacitive touch screen according to claim 1 is characterized in that, also comprises step S5, the said position data of baseband processor, the response touch event.
3. the anti-static method of capacitive touch screen according to claim 1; It is characterized in that said step S4, after said touch event is labeled as the touch event of static false triggering uploads to BBP; BBP sends reset signal, makes touch-screen reset.
4. the anti-static method of capacitive touch screen according to claim 1 is characterized in that, the size of the certain time interval T among the said step S3 is by the frequency decision of the sweep signal of touch-screen.
5. the anti-static method of capacitive touch screen according to claim 1 is characterized in that, said certain time interval T satisfies: 10 milliseconds of < < 20 milliseconds of T.
6. a capacitive touch screen links to each other with BBP, it is characterized in that, comprising:
Touch panel is used for receiving touching and instructs;
The touch-screen control chip is used for according to touching instruction, the touch screen scanning panel, and the senses touch incident, and the result sent to BBP;
Said touch panel links to each other with BBP through the touch-screen control chip.
7. capacitive touch screen according to claim 6 is characterized in that, said touch-screen control chip further comprises:
The one-time detection unit is used for the touch screen scanning panel, the senses touch incident;
Delay cell, be used for when detection behind touch event, postpone certain hour;
The secondary check unit is used for behind the delay units delay certain hour, touch screen scanning panel, senses touch incident.
8. capacitive touch screen according to claim 6 is characterized in that, said BBP further comprises:
Judging unit is used for the touch event that the touch-screen control chip sends is judged, if the touch event of static false triggering then sends reset instruction to the touch-screen control chip, otherwise responds said touch event.
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| CN201110296709.7A CN102314277B (en) | 2011-09-30 | 2011-09-30 | Anti-static method of capacitive touch screen and corresponding capacitive touch screen |
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| CN201110296709.7A CN102314277B (en) | 2011-09-30 | 2011-09-30 | Anti-static method of capacitive touch screen and corresponding capacitive touch screen |
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| CN102622150A (en) * | 2012-02-22 | 2012-08-01 | 广东欧珀移动通信有限公司 | Static eliminating method for touch screen |
| CN102681739A (en) * | 2012-05-07 | 2012-09-19 | 广东欧珀移动通信有限公司 | Static elimination method for touch screen |
| CN102830875A (en) * | 2012-08-10 | 2012-12-19 | 广东欧珀移动通信有限公司 | Method for improving electrostatic resistance of capacitive screen by filtering algorithm |
| WO2013123775A1 (en) * | 2012-02-22 | 2013-08-29 | 广东欧珀移动通信有限公司 | Static elimination method for touch screen |
| WO2013174328A1 (en) * | 2012-08-30 | 2013-11-28 | 中兴通讯股份有限公司 | Touchscreen scanning frequency adjustment method and electronic terminal |
| CN103970315A (en) * | 2013-01-28 | 2014-08-06 | 宏碁股份有限公司 | Touch control device and detection method for touch control information |
| CN106325604A (en) * | 2016-08-29 | 2017-01-11 | 贵州乾盛科技有限公司 | Touch screen static electricity protection method, touch screen, baseband processor and touch panel |
| WO2017117858A1 (en) * | 2016-01-06 | 2017-07-13 | 中兴通讯股份有限公司 | Electrostatic capacity detecting method, device and terminal |
| CN108468189A (en) * | 2018-02-26 | 2018-08-31 | 青岛海尔洗衣机有限公司 | Touch screen control method and smart machine |
| CN109444608A (en) * | 2018-12-18 | 2019-03-08 | 深圳贝特莱电子科技股份有限公司 | A kind of detection of touch screen static discharge and guard method |
| CN114421948A (en) * | 2021-12-03 | 2022-04-29 | 珠海格力电器股份有限公司 | Touch panel assembly, electronic device and control method thereof |
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| CN102622150B (en) * | 2012-02-22 | 2015-05-06 | 广东欧珀移动通信有限公司 | Static eliminating method for touch screen |
| WO2013123775A1 (en) * | 2012-02-22 | 2013-08-29 | 广东欧珀移动通信有限公司 | Static elimination method for touch screen |
| CN102622150A (en) * | 2012-02-22 | 2012-08-01 | 广东欧珀移动通信有限公司 | Static eliminating method for touch screen |
| CN102681739A (en) * | 2012-05-07 | 2012-09-19 | 广东欧珀移动通信有限公司 | Static elimination method for touch screen |
| CN102681739B (en) * | 2012-05-07 | 2015-06-17 | 广东欧珀移动通信有限公司 | Static elimination method for touch screen |
| CN102830875A (en) * | 2012-08-10 | 2012-12-19 | 广东欧珀移动通信有限公司 | Method for improving electrostatic resistance of capacitive screen by filtering algorithm |
| CN102830875B (en) * | 2012-08-10 | 2015-12-02 | 广东欧珀移动通信有限公司 | A kind of method adopting filtering algorithm to improve capacitance plate antistatic property |
| WO2013174328A1 (en) * | 2012-08-30 | 2013-11-28 | 中兴通讯股份有限公司 | Touchscreen scanning frequency adjustment method and electronic terminal |
| CN103677449A (en) * | 2012-08-30 | 2014-03-26 | 中兴通讯股份有限公司 | Method for adjusting scanning frequency of touch screen and electronic terminal |
| CN103677449B (en) * | 2012-08-30 | 2016-12-21 | 中兴通讯股份有限公司 | The method of adjustment of a kind of touch screen rate of scanning and electric terminal |
| CN103970315A (en) * | 2013-01-28 | 2014-08-06 | 宏碁股份有限公司 | Touch control device and detection method for touch control information |
| CN103970315B (en) * | 2013-01-28 | 2017-05-10 | 宏碁股份有限公司 | Touch control device and detection method for touch control information |
| WO2017117858A1 (en) * | 2016-01-06 | 2017-07-13 | 中兴通讯股份有限公司 | Electrostatic capacity detecting method, device and terminal |
| CN106325604A (en) * | 2016-08-29 | 2017-01-11 | 贵州乾盛科技有限公司 | Touch screen static electricity protection method, touch screen, baseband processor and touch panel |
| CN108468189A (en) * | 2018-02-26 | 2018-08-31 | 青岛海尔洗衣机有限公司 | Touch screen control method and smart machine |
| CN108468189B (en) * | 2018-02-26 | 2023-09-12 | 青岛海尔洗衣机有限公司 | Touch screen control method and intelligent device |
| CN109444608A (en) * | 2018-12-18 | 2019-03-08 | 深圳贝特莱电子科技股份有限公司 | A kind of detection of touch screen static discharge and guard method |
| CN109444608B (en) * | 2018-12-18 | 2021-01-05 | 深圳贝特莱电子科技股份有限公司 | Electrostatic discharge detection and protection method for touch screen |
| CN114421948A (en) * | 2021-12-03 | 2022-04-29 | 珠海格力电器股份有限公司 | Touch panel assembly, electronic device and control method thereof |
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