CN103257773B - Face based on capacitance touch screen is near recognition methods - Google Patents
Face based on capacitance touch screen is near recognition methods Download PDFInfo
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- CN103257773B CN103257773B CN201310162646.5A CN201310162646A CN103257773B CN 103257773 B CN103257773 B CN 103257773B CN 201310162646 A CN201310162646 A CN 201310162646A CN 103257773 B CN103257773 B CN 103257773B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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Abstract
The invention provides a kind of face based on capacitance touch screen near recognition methods, changed by noise on detection induction apparatus detection capacitance touch screen that capacitance touch screen is connected and noise intensity can differentiate that face is close.Compared to the common scheme using infrared sensor sensing, the beneficial effects of the present invention is by the electric capacity far field coupling differentiation face of TP near action, structurally, mainboard can reduce IR sensing circuit, and glass cover-plate is also not required to use ink special.And applicable mutual capacitance type touch screen and self-capacitance touch screen, widely applicable, application prospect is more preferable.
Description
Technical field
The present invention relates to touch screen detection application, refer in particular to a kind of face based on capacitance touch screen near recognition methods.
Background technology
This series products of existing product, particularly mobile phone, it often arranges an infrared sensor, so that people are when answering the call, differentiate that face is the most close by this infrared sensor, and then display is extinguished in notice master control, reaches power saving and prevents the effects such as maloperation.
But, need on mobile phone to set up this infrared sensor, relate to need on the glass cover-plate of mobile phone, offer a transparency window, and often this partial shell of mobile phone can be in outward appearance needs and cover ink, therefore to ensure that this partially transparent generally requiring adds ink special, additionally, also need to increase IR in main frame to sense interlock circuit more.Visible traditional special mode using infrared sensor can increase the cost of mobile phone, also can reduce the yields in mobile phone production process.
Summary of the invention
It is an object of the invention to overcome drawbacks described above, it is provided that a kind of face based on capacitance touch screen is near recognition methods.
The object of the present invention is achieved like this: a kind of face based on capacitance touch screen is near recognition methods, and it also includes step,
A), Host Command capacitance touch screen is opened；
B) capacitance touch screen detection, is opened；
C), judge that face is the most close, be to continue step, otherwise forward step E to；
Wherein, this step specifically includes,
C1), the influence value of detection touch screen top half whether meet change close to condition, otherwise output court verdict is that face does not then repeat this step close to action, is to continue step；
As an embodiment, whether the influence value of the top half detecting touch screen 1/5 in this step meets change close to condition；Optimal, described threshold value is counted not less than 5；
C2), the sense node of detection touch screen top half whether exceed threshold value and count, if then to main frame output differentiate result be face close to action, otherwise differentiate that result is that face is not close to action to main frame output；Described threshold value is counted more than 2；
D) continuing step after, to main frame sending dormancy information, main frame controls equipment component after receiving and enters dormancy duty；
E), judge whether to close detection, otherwise return to step C, be, exit detection.
Compared to the common scheme using infrared sensor sensing, the beneficial effects of the present invention is by the electric capacity far field coupling differentiation face of TP near action, structurally, mainboard can reduce IR sensing circuit, and glass cover-plate is also not required to use ink special.And applicable mutual capacitance type touch screen and self-capacitance touch screen, when face near time, changed by the noise of detection induction apparatus, and noise intensity can differentiate face near action, widely applicable, application prospect is more preferable.
Accompanying drawing explanation
The concrete structure of the present invention is described in detail in detail below in conjunction with the accompanying drawings
Fig. 1 is the overall flow figure of the present invention；
Fig. 2 be the present invention judge that face is whether near the flow chart of step.
Detailed description of the invention
By describing the technology contents of the present invention, structural feature in detail, being realized purpose and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
Refer to Fig. 1, the invention provides a kind of face based on capacitance touch screen near recognition methods,
A), Host Command capacitance touch screen is opened；
B) capacitance touch screen detection, is opened；
C), judge that face is the most close, be to continue step, otherwise forward step E to；
D) continuing step after, to main frame sending dormancy information, main frame controls equipment component after receiving and enters dormancy duty；
E), judge whether to close detection, otherwise return to step C, be, exit.
Pass through said method, any equipment equipped with capacitance touch screen can be made, in use, when face is close, coupling electricity between the plate of capacitance touch screen i.e. can hold and changes, and the signal of signalling channel sends change, and then identifies that face near situation thus issues equipment mainboard by processing just can be converted into, controlled to switch screen by mainboard again, thus realize the sensing face identical with the being provided with infrared sensor habitually in the past purpose near action.
Compare the products such as current phone, mainboard is differentiated by IR sensor face is near action when answering the call.The art of this patent is then by the electric capacity far field coupling differentiation face of TP that structurally, mainboard can reduce IR sensing circuit, and hardware has only to increase by two induction channels in original capacitance plate IC control near action.And glass cover-plate is also not required to use ink special.As long as according to capacitance touch screen practical situation, adjust electric capacity drive signal and add long-range sequence coupling algorithm, relatively than original by IR sensor, the penetration (regulation of IR ink) in regulation IR hole, regulating the distance of IR sensing, it is big for convenience in the close mode sensing face that IR transmits signals to receive signal.Can support at present can realize at mutual capacitance type touch screen and self-capacitance touch screen, when face near time, induction apparatus all can produce noise change, by differentiating that noise intensity differentiates that face, near action, therefore applies widely.
Concrete, as in figure 2 it is shown, above-mentioned steps C judge the step that face is the most close, including:
C1), the influence value of detection touch screen top half whether meet change close to condition, otherwise output court verdict is that face does not then repeat this step close to action, is to continue step；
This step only carries out sensing when being owing to making a phone call to touch screen top half, and owing to receiver is provided in the top of mobile phone screen, during therefore using, the top of main mobile phone screen is near face.According to repeatedly testing, we obtain the most satisfied change of influence value preferably by the top half of capacitive sensing device detection touch screen 1/5 of this step further close to condition.1/5 part on touch screen is selected to draw by different mobile phones are carried out actually detected combination Consumer's Experience, existing main flow mobile phone screen has screen enlarging trend, but undeniable be that the small screen mobile phone also has certain market share, therefore this numerical value can obtain the balance of the two comparatively speaking.Certainly, for corresponding giant-screen mobile phone, this scope can reduce the demand that also can meet test accuracy further.
Change in this step needs to select different conditions close to condition according to different capacitance plates, and concrete method of testing example is as follows:
Test target
1) mobile phone distance much with face differentiates, and stability.
2) testing mobile phone differentiates sensitivity near face.
Experiment equipment
1) multi-leaf design is good band noise differentiates that the sensor patterns of the close CTP(CTP of face is different, it is ensured that CTP is good).
2) ruler
3) computer and CTP debugging software
4) CTP testing tool
Method of testing
1) choose different CTP, number consecutively, by testing tool, CTP is connected with computer.
2) repeatedly take each CTP at the capacitance near each distance coupling of face 0.5 to 5CM, record capacitance.
Data process
1) by multiple data and distance list, observed data and the relation of distance of the data every CTP every some test of record.
2) data of record are contrasted, choose the most reasonably distance most stable of CTP of capacitance and determine sensor patterns.
The CTP determined is tested by 3 again, stop more than 1 minute in each measuring distance, observed data whether occur sudden change, it is proposed that CTP control chip process sensing data time, can capacitance occur change time (close to or away from face) can by short time repeatedly differentiation process.
Actual result
Draw its stability and sensitivity by the data of test, confirm the practical value of the program.
C2), the sense node of detection touch screen top half whether exceed threshold value and count, if then to main frame output differentiate result be face close to action, otherwise differentiate that result is that face is not close to action to main frame output.Owing to capacitance touch screen supports multi-point touch, therefore to placement maloperation, sense node is differentiated by this step, the most above-mentioned threshold value is counted more than 2, optimal threshold value is counted not less than 5, the quantity of test point directly affects detection accuracy, the fewest more easily accommodate noise, therefore combines Consumer's Experience according to test repeatedly and recommends at least to use 5 threshold values to count herein.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every equivalent structure utilizing description of the invention and accompanying drawing content to be made or equivalence flow process conversion, or directly or indirectly use.
Claims (1)
1. a face based on capacitance touch screen is near recognition methods, it is characterised in that:
Including step,
A), Host Command capacitance touch screen is opened；
B) capacitance touch screen detection, is opened；
C), judge that face is the most close, be to continue step, otherwise forward step E to；
D) continuing step after, to main frame sending dormancy information, main frame controls equipment component after receiving and enters dormancy
Duty；
E), judge whether to close detection, otherwise return to step C, be, exit detection；
Wherein step C specifically includes
Whether the influence value of the far field coupling electric capacity C1), detecting the top half of touch screen 1/5 meets change connects
Nearly condition, otherwise output court verdict is that face does not then repeat this step close to action, is to continue step；
C2), the sense node of detection touch screen top half whether exceed threshold value and count, if then defeated to main frame
Go out to differentiate result be face close to action, otherwise to main frame output differentiate result be that face is not close to action；Institute
State threshold value to count not less than 5；
Wherein, the change in step C1 selects different conditions close to condition according to different capacitance touch screens,
Determined by following method of testing:
Choose multi-disc difference CTP, number consecutively, by testing tool, CTP is connected with computer；
Repeatedly take each CTP at the capacitance near face 0.5-5cm each distance coupling, record capacitance；
Multiple data of every some test of every CTP in the data of record are carried out list with distance；
The data of record are compared, chooses the most stable of CTP of capacitance and determine sensor patterns.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310162646.5A CN103257773B (en) | 2013-05-06 | 2013-05-06 | Face based on capacitance touch screen is near recognition methods |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310162646.5A CN103257773B (en) | 2013-05-06 | 2013-05-06 | Face based on capacitance touch screen is near recognition methods |
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| CN103257773B true CN103257773B (en) | 2016-08-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104571529A (en) * | 2015-01-28 | 2015-04-29 | 锤子科技（北京）有限公司 | Application wake method and mobile terminal |
| CN108965509B (en) * | 2018-06-15 | 2020-07-17 | Oppo广东移动通信有限公司 | Electronic equipment, screen control method and related product |
| CN109067966B (en) * | 2018-06-15 | 2021-01-29 | Oppo广东移动通信有限公司 | Proximity detection method and related equipment |
| CN109388286B (en) * | 2018-09-26 | 2022-03-22 | Oppo广东移动通信有限公司 | Proximity state judgment method and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102722297A (en) * | 2011-03-30 | 2012-10-10 | 中兴通讯股份有限公司 | Touch screen equipment and method for realizing proximity induction thereof |
| CN102810017A (en) * | 2011-05-30 | 2012-12-05 | 宏碁股份有限公司 | Touch device capable of avoiding accidental touches and control method of touch device |
| CN102855018A (en) * | 2012-07-27 | 2013-01-02 | 北京爱格码科技有限责任公司 | Method for achieving proximity sensing through touch screen capacitance induction |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102722297A (en) * | 2011-03-30 | 2012-10-10 | 中兴通讯股份有限公司 | Touch screen equipment and method for realizing proximity induction thereof |
| CN102810017A (en) * | 2011-05-30 | 2012-12-05 | 宏碁股份有限公司 | Touch device capable of avoiding accidental touches and control method of touch device |
| CN102855018A (en) * | 2012-07-27 | 2013-01-02 | 北京爱格码科技有限责任公司 | Method for achieving proximity sensing through touch screen capacitance induction |
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