CN116501197B - Method for preventing NFC equipment from interfering touch pad - Google Patents
Method for preventing NFC equipment from interfering touch pad Download PDFInfo
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- CN116501197B CN116501197B CN202310764075.6A CN202310764075A CN116501197B CN 116501197 B CN116501197 B CN 116501197B CN 202310764075 A CN202310764075 A CN 202310764075A CN 116501197 B CN116501197 B CN 116501197B
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- 238000000034 method Methods 0.000 title claims abstract description 32
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- 239000010410 layer Substances 0.000 claims 4
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- 238000001514 detection method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000004891 communication Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 101100120298 Rattus norvegicus Flot1 gene Proteins 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
- G06F3/04182—Filtering of noise external to the device and not generated by digitiser components
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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
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method for preventing NFC equipment from interfering a touch pad, relates to the technical field of touch products, and solves the technical problem that the NFC equipment is close to the touch pad to generate interference, so that the touch pad misreports coordinates. S1, acquiring a capacitance value of a self-contained channel node of an NFC region; wherein the NFC region comprises a TX direction region and an RX direction region; s2, traversing the capacitance value of the NFC region mutual capacitance channel node when the capacitance value of the self-capacitance channel node meets the approaching condition; s3, dividing interference grades according to the capacitance value of the NFC region mutual capacitance channel node; s4, if the interference level is low, disabling the NFC area of the touch panel from reporting points; and if the interference levels are high, the touch pad global reporting is forbidden. The invention can effectively prevent the NFC equipment from being close to the interference on the touch pad.
Description
Technical Field
The invention relates to the technical field of touch products, in particular to a method for preventing NFC equipment from interfering with a touch pad.
Background
With the development of NFC (Near Field Communication) technology and the improvement of user experience requirements, the Windows notebook touch pad integrates the NFC technology, and the NFC function is a non-contact identification and interconnection technology, so that near field wireless communication can be performed among mobile devices, consumer electronic products, PCs and intelligent control tools, and the application is more and more widespread.
In the notebook, the touch panel is suitable for a place where the NFC coil is provided, in terms of physical aspects such as reduction of influence on the case and countermeasure against interference with other devices. The Chinese patent with publication number of CN107544689B proposes an electronic device for preventing misoperation of a touch panel and a method for preventing misoperation, wherein the detection sensitivity of the touch panel is reduced during NFC operation, so that the interference to the touch panel during NFC operation is reduced, and invalid coordinates are prevented from being reported by the touch panel; however, the detection flow of the method mixes the detection of the touch pad with the flow of the NFC operation, so that the normal flow of detecting the finger by the touch pad detects whether the metal block exists in advance, and the cost is increased. In addition, in the communication mode, the disabling signal is output through the hardware circuit to prohibit the touch panel from reporting the coordinates, and when the NFC communication module is close, the signal is not generated yet, and at the moment, the interference of NFC to the touch panel is generated, so that the risk of false reporting of the coordinates exists.
In the process of implementing the present invention, the inventor finds that at least the following problems exist in the prior art:
the proximity of the NFC device to the touch pad can create interference, resulting in false alarms of coordinates by the touch pad.
Disclosure of Invention
The invention aims to provide a method for preventing NFC equipment from interfering with a touch pad, so as to solve the technical problem that the NFC equipment is close to the touch pad and can generate interference in the prior art, and the touch pad misreports coordinates. The preferred technical solutions of the technical solutions provided by the present invention can produce a plurality of technical effects described below.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the invention provides a method for preventing NFC equipment from interfering a touch pad, which comprises the following steps of
S1, acquiring a capacitance value of a self-contained channel node of an NFC region; wherein the NFC region comprises a TX direction region and an RX direction region;
s2, traversing the capacitance value of the NFC region mutual capacitance channel node when the capacitance value of the self-capacitance channel node meets the approaching condition;
s3, dividing interference grades according to the capacitance value of the NFC region mutual capacitance channel node;
s4, if the interference level is low, disabling the NFC area of the touch panel from reporting points; the plurality of disturbance levels are high, and the global reporting of the touch pad is forbidden;
the approaching condition in step S2 includes:
t1, the maximum capacitance value of the NFC area self-contained channel node is larger than an NFC reporting threshold value;
t2, the first capacitance data characteristic value of the self-contained channel is in a threshold value interval;
t3, the second capacitance data characteristic value of the self-contained channel is smaller than a threshold value;
the first capacitance data characteristic value is as follows:the method comprises the steps of carrying out a first treatment on the surface of the Wherein ScDiff (i) is a capacitance value corresponding to a self-capacitance channel node, and ScReg1 is a node of the self-capacitance channel of the TX direction area; />The average value of the capacitance values of the self-capacitance channel nodes in the RX direction area is obtained; the threshold interval is (ThrdL, thrdH);
the second capacitance data characteristic value is:the method comprises the steps of carrying out a first treatment on the surface of the Wherein ScDiff (j) is a capacitance value corresponding to a self-capacitance channel node, and ScReg2 is a node of the self-capacitance channel of the RX-direction region;the average value of the capacitance values of the self-capacitance channel nodes in the RX direction area is obtained; the threshold is SumScDiffThd; ABS () is an absolute value function.
Preferably, the T1 condition is a pre-judgment condition, and when the capacitance value of the self-capacitance channel node does not meet the pre-judgment condition, the judgment of the T2 condition and the T3 condition is not performed.
Preferably, step S3 includes:
s31, calculating the ratio of the sum of capacitance values of the mutual capacitance channel nodes of the TX direction area to the average value of capacitance values of the mutual capacitance channel nodes of the RX direction area;
s32, marking mutual capacity channels of which the ratio is in a threshold value interval and counting the number of marked channels;
s33, if the number is smaller than the interference threshold value, the interference level is low, and if the number is larger than or equal to the threshold value, the interference level is high.
Preferably, the touch panel is a double-layer touch panel, and comprises a touch layer and a device layer which are stacked; NFC chip and NFC coil are arranged on the device layer, and the NFC coil is in a shape of a Chinese character 'Hui' and surrounds the center of the device layer.
Preferably, the NFC area is an entire area surrounded by the NFC coil on the touch pad; the TX direction area is an area where the NFC coil is located in a vertical direction on the touch panel; the RX direction area is an area where the NFC coil is positioned in the horizontal direction on the touch pad and an intermediate area surrounded by the coil.
By implementing one of the technical schemes, the invention has the following advantages or beneficial effects:
according to the invention, whether the NFC equipment approaches is detected through the change of the self capacitance, and then the interference level is divided through the change of the mutual capacitance, and the touch panel is forbidden to report points in the approaching process of the NFC equipment, so that the interference of NFC on the touch panel is prevented; the method is high in identification speed, NFC is not required to be detected by other hardware detection equipment, and manufacturing cost is saved.
Drawings
For a clearer description of the technical solutions of embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art, in which:
fig. 1 is a flowchart of a method for preventing an NFC device from interfering with a touch pad according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a touch pad according to an embodiment of the invention;
fig. 3 is a flowchart of a method step S3 of preventing an NFC device from interfering with a touch pad according to an embodiment of the present invention;
FIG. 4 is a graph of capacitance data for a touch pad in accordance with an embodiment of the present invention;
in the figure: 1. an NFC region; 10. an NFC coil; 11. a TX direction region; 12. an RX direction region; 2. a touch panel.
Detailed Description
For a better understanding of the objects, technical solutions and advantages of the present invention, reference should be made to the various exemplary embodiments described hereinafter with reference to the accompanying drawings, which form a part hereof, and in which are described various exemplary embodiments which may be employed in practicing the present invention. The same reference numbers in different drawings identify the same or similar elements unless expressly stated otherwise. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. It is to be understood that they are merely examples of processes, methods, apparatuses, etc. that are consistent with certain aspects of the present disclosure as detailed in the appended claims, other embodiments may be utilized, or structural and functional modifications may be made to the embodiments set forth herein without departing from the scope and spirit of the present disclosure.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "transverse," and the like are used in an orientation or positional relationship based on that shown in the drawings, and are merely for convenience in describing the present invention and to simplify the description, rather than to indicate or imply that the elements referred to must have a particular orientation, be constructed and operate in a particular orientation. The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The term "plurality" means two or more. The terms "connected," "coupled" and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, communicatively connected, directly connected, indirectly connected via intermediaries, or may be in communication with each other between two elements or in an interaction relationship between the two elements. The term "and/or" includes any and all combinations of one or more of the associated listed items. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In order to illustrate the technical solutions of the present invention, the following description is made by specific embodiments, only the portions related to the embodiments of the present invention are shown.
Embodiment one:
as shown in fig. 1, the present invention provides a method for preventing an NFC device from interfering with a touch pad, including:
s1, acquiring a capacitance value of a self-contained channel node of an NFC region; the NFC area comprises a TX direction area and an RX direction area;
s2, traversing the capacitance value of the NFC region mutual capacitance channel node when the capacitance value of the self-capacitance channel node meets the approaching condition; when the capacitance value of the self-capacitance channel node meets the approaching condition, indicating that the NFC equipment is approaching, and starting the self-capacitance channel to detect whether the NFC has serious interference on the touch panel;
s3, dividing interference grades according to capacitance values of the NFC region mutual capacitance channel nodes;
s4, if the interference level is low, forbidding the NFC area of the touch panel to report points; and if the disturbance levels are high, the global reporting of the touch pad is forbidden.
In the embodiment, whether the NFC equipment approaches is detected through the change of the self-capacitance, then the interference level is divided through the change of the mutual capacitance, and the touch panel is forbidden to report points in the approaching process of the NFC equipment, so that the interference of NFC on the touch panel is prevented; the method is high in identification speed, NFC is not required to be detected by other hardware detection equipment, and manufacturing cost is saved.
The touch panel 2 is a double-layer touch panel and comprises a touch layer and a device layer which are arranged in a stacked manner; the NFC chip and the NFC coil 10 are arranged on the device layer, and the NFC coil 10 surrounds the center of the device layer in a shape of a Chinese character 'Hui'. The NFC coils 10 are uniformly distributed on the induction channel and the driving channel from left to right, and the magnitude of induction capacitance of the NFC region 1 is changed by NFC communication, so that interference on the touch pad is generated.
As shown in fig. 2, the NFC region 1 is the entire region surrounded by the NFC coil 10 on the touch panel 2; the TX direction area 11 is an area where the NFC coil 10 is located in a vertical direction on the touch panel 2; the RX direction area 12 is an area where the NFC coil 10 is located in the horizontal direction on the touch panel 2 and an intermediate area surrounded by the coils.
As an alternative embodiment, the approaching condition of step S2 includes:
t1, the maximum capacitance value ScDiffMax of the self-contained channel node of the NFC area is larger than the NFC reporting threshold value ScMaxThmd; the NFC reporting threshold is empirically set to be less than the capacitance of the lowest reporting coordinate of the touch pad. Because the interference is generated in the approaching process of the NFC equipment, the NFC reporting point threshold value is set to be smaller than the capacitance value of the lowest reporting coordinate of the touch panel, and the approaching detection of the NFC equipment can be completed before the coordinates are reported by the touch panel, so that the reporting point is forbidden, namely, the touch panel can not report the coordinates due to the subsequent interference of the NFC equipment, and the interference of the NFC on the touch panel is prevented;
t2, the first capacitance data characteristic value of the self-capacitance channel is within a threshold value interval (ThrdL, thrdH); the first capacitance data feature represents the data relationship of the node capacitance values in the TX direction region 11 and the RX direction region 12, and the threshold interval is an empirical value obtained according to the interference data; the first capacitance data feature represents the data relationship of the node capacitance values in the TX direction region 11 and the RX direction region 12, and the threshold interval is an empirical value obtained according to the interference data;
and T3, the second capacitance data characteristic value of the self-capacitance channel is smaller than a threshold SumScDiffThrd. The second capacitance data characteristic represents the flatness of the capacitance data of the RX direction area 12, the larger the value the more uneven the value the stronger the disturbance of the NFC, whereas the flatter the disturbance of the NFC the smaller.
The first capacitance data characteristic value is:the method comprises the steps of carrying out a first treatment on the surface of the Wherein ScDiff (i) is a capacitance value corresponding to a self-capacitance channel node, and ScReg1 is a node of the self-capacitance channel in the TX direction area; />The average value of the capacitance values of the self-capacitance channel nodes in the RX direction area is obtained; the threshold interval is (ThrdL, thrdH). The second capacitance data characteristic value is:the method comprises the steps of carrying out a first treatment on the surface of the Wherein ScDiff (j) is a capacitance value corresponding to a self-capacitance channel node, and ScReg2 is a node of the self-capacitance channel in the RX direction region; />The average value of the capacitance values of the self-capacitance channel nodes in the RX direction area is obtained; the threshold value is SumScDiffThrd; ABS () is an absolute value function. And the T1 condition is a pre-judging condition, and when the capacitance value of the self-contained channel node does not meet the pre-judging condition, the judgment of the T2 condition and the T3 condition is not carried out. When the pre-judging condition is reached, the judgment of the T2 condition and the T3 condition is started again, so that the calculation load of the main control MCU can be reduced.
As an alternative embodiment, as shown in fig. 3, step S3 includes:
s31, calculating the ratio of the sum of capacitance values of each mutual capacitance channel node in the TX direction area to the average value of capacitance values of the mutual capacitance channels in the RX direction area;
s32, marking the mutual capacity channels with the ratio in a threshold value interval (ThrdL, thrdH) and counting the number of marked channels; the threshold interval is the same as the threshold interval of the self-contained channel;
s33, the number is lower than the interference threshold value and is divided into the interference level low, and the number is higher than the threshold value and is divided into the interference level high.
As shown in FIG. 4, (RX 01-RX 26, SC_RX) is the capacitance of the self-capacitance channel, (RX 01-RX 26, TX 01-TX 15) is the capacitance of the mutual capacitance channel, the interference starting value region corresponding to NFC region 1 is (RX 08-RX 20, TX 03-TX 11), the self-capacitance channels occupied by TX direction region 11 are (RX 08-RX 09, SC_RX), (RX 19-RX 20, SC_RX), respectively, which are significantly larger than the self-capacitance channels occupied by RX direction region 12 (RX 10-RX 18, SC_RX) in terms of interference. Taking fig. 4 as an example, an NFC header threshold scmaxthd=300 is set; threshold interval (ThrdL, thrdH) = (8.5,11); threshold sumscdiffthrd=200; the interference threshold is 3, and when the judgment is carried out according to the method, the maximum capacitance value ScDiffMax=1030 of the self-contained channel node of the NFC area is obviously larger than the NFC reporting threshold ScMaxThmd=300; thus turning on the T2 condition and the T3 condition, the second data characteristic value isWithin the threshold interval, third data characteristic value +.>=ABS(374-ScDiffAvrg Reg2 )+ABS(371-ScDiffAvrg Reg2 )+...+ABS(374-ScDiffAvrg Reg2 ) Calculated to be 59, less than the threshold SuThe mscdiffthrd=200, and simultaneously satisfies 3 conditions, so that the approach of the NFC device is illustrated, and further, the change of the capacitance value of the mutual capacitance channel is detected, if the number of marked channels is 2, only the reporting point of the NFC area is forbidden, and if the number of marked channels is 5, the global reporting point is forbidden.
According to the method, whether the NFC equipment is close or not is detected through the change of the self capacitance, when the fact that the equipment is close is determined, the interference level is divided by detecting the mutual capacitance value, the reporting of points is forbidden for the area with high interference level, and if the interference level is low, the reporting of points in the NFC area is forbidden only, so that the interference of NFC to the touch pad can be effectively prevented, the identification speed is high, the NFC is not required to be detected by other hardware detection equipment, and the manufacturing cost is saved.
The embodiment is a specific example only and does not suggest one such implementation of the invention.
The foregoing is only illustrative of the preferred embodiments of the invention, and it will be appreciated by those skilled in the art that various changes in the features and embodiments may be made and equivalents may be substituted without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (5)
1. A method for preventing an NFC device from interfering with a touch pad, comprising
S1, acquiring a capacitance value of a self-contained channel node of an NFC region; wherein the NFC region comprises a TX direction region and an RX direction region;
s2, traversing the capacitance value of the NFC region mutual capacitance channel node when the capacitance value of the self-capacitance channel node meets the approaching condition;
s3, dividing interference grades according to the capacitance value of the NFC region mutual capacitance channel node;
s4, if the interference level is low, disabling the NFC area of the touch panel from reporting points; the plurality of disturbance levels are high, and the global reporting of the touch pad is forbidden;
the approaching condition in step S2 includes:
t1, the maximum capacitance value of the NFC area self-contained channel node is larger than an NFC reporting threshold value;
t2, the first capacitance data characteristic value of the self-contained channel is in a threshold value interval;
t3, the second capacitance data characteristic value of the self-contained channel is smaller than a threshold value;
the first capacitance data characteristic value is as follows:the method comprises the steps of carrying out a first treatment on the surface of the Wherein ScDiff (i) is a capacitance value corresponding to a self-capacitance channel node, and ScReg1 is a node of the self-capacitance channel of the TX direction area; />The average value of the capacitance values of the self-capacitance channel nodes in the RX direction area is obtained; the threshold interval is (ThrdL, thrdH);
the second capacitance data characteristic value is:the method comprises the steps of carrying out a first treatment on the surface of the Wherein ScDiff (j) is a capacitance value corresponding to a self-capacitance channel node, and ScReg2 is a node of the self-capacitance channel of the RX-direction region; />The average value of the capacitance values of the self-capacitance channel nodes in the RX direction area is obtained; the threshold is SumScDiffThd; ABS () is an absolute value function.
2. The method for preventing an NFC device from interfering with a touch pad according to claim 1, wherein the T1 condition is a pre-judgment condition, and when the capacitance value of the self-contained channel node does not meet the pre-judgment condition, the judgment of the T2 condition and the judgment of the T3 condition are not performed.
3. The method of claim 1, wherein step S3 includes:
s31, calculating the ratio of the sum of capacitance values of the mutual capacitance channel nodes of the TX direction area to the average value of capacitance values of the mutual capacitance channel nodes of the RX direction area;
s32, marking mutual capacity channels of which the ratio is in a threshold value interval and counting the number of marked channels;
s33, if the number is smaller than the interference threshold value, the interference level is low, and if the number is larger than or equal to the threshold value, the interference level is high.
4. The method for preventing an NFC device from interfering with a touch pad according to claim 1, wherein the touch pad is a dual-layer touch pad comprising a touch layer and a device layer that are stacked; NFC chip and NFC coil are arranged on the device layer, and the NFC coil is in a shape of a Chinese character 'Hui' and surrounds the center of the device layer.
5. The method of claim 4, wherein the NFC region is an entire region surrounded by the NFC coil on the touch pad; the TX direction area is an area where the NFC coil is located in a vertical direction on the touch panel; the RX direction area is an area where the NFC coil is positioned in the horizontal direction on the touch pad and an intermediate area surrounded by the coil.
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| CN106791187A (en) * | 2017-01-24 | 2017-05-31 | 努比亚技术有限公司 | A kind of mobile terminal and NFC method |
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| JP7122709B1 (en) * | 2022-02-02 | 2022-08-22 | パナソニックＩｐマネジメント株式会社 | ELECTRONIC DEVICE AND METHOD OF CONTROLLING ELECTRONIC DEVICE |
| CN115291752A (en) * | 2022-09-28 | 2022-11-04 | 上海海栎创科技股份有限公司 | Touch interference suppression method and system, computer device and readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106814915A (en) * | 2017-01-17 | 2017-06-09 | 宇龙计算机通信科技(深圳)有限公司 | A kind of touch-screen display control method and system for mobile terminal |
| CN106791187A (en) * | 2017-01-24 | 2017-05-31 | 努比亚技术有限公司 | A kind of mobile terminal and NFC method |
| CN110475000A (en) * | 2019-08-08 | 2019-11-19 | Oppo（重庆）智能科技有限公司 | Touch screen report point methods and relevant device |
| JP7122709B1 (en) * | 2022-02-02 | 2022-08-22 | パナソニックＩｐマネジメント株式会社 | ELECTRONIC DEVICE AND METHOD OF CONTROLLING ELECTRONIC DEVICE |
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