CN110554797A - sensing method of touch control identification device and sensing module thereof - Google Patents
sensing method of touch control identification device and sensing module thereof Download PDFInfo
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- G—PHYSICS
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- 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
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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Abstract
the invention discloses a sensing method of a touch identification device, which comprises the following steps: selecting a first sensing electrode to perform reverse measurement; driving more than one driving electrode, measuring the first sensing electrode to obtain a first measurement value, and measuring other sensing electrodes except the first sensing electrode to obtain other point measurement values; comparing the variation value of each point measurement value on the same driving electrode with the first measurement value; checking whether the variance value is above or below a threshold limit; if yes, judging that the sensing electrode on the point measurement value is abnormal; and stopping touch measurement when at least one variation value is higher or lower than a threshold limit value. The invention can judge whether the touch signal is read or not on the touch identification device by periodically or real-timely executing a judging program in the general periodic wave difference comparison operation of the sensing method in an alternating manner, and eliminate the noise signal, thereby improving the overall sensing accuracy.
Description
[ technical field ] A method for producing a semiconductor device
The present invention relates to a sensing method and a sensing module of a touch recognition device, and more particularly, to a sensing method and a sensing module for determining whether a foreign object is located on a touch recognition device when a touch signal is read, so as to improve the overall sensing accuracy.
[ background of the invention ]
A touch panel or a touch screen is one of the main modern human-machine interfaces, and as a position recognition device, the touch panel or the touch screen can be skillfully combined with an input interface and a display interface, so that the touch panel or the touch screen has the advantages of saving the device space and humanizing the operation, and is widely applied to various consumer or industrial electronic products at present. Examples are: personal Digital Assistants (PDAs), palm-sized PCs, tablet computers, mobile phones, Information appliances, Point-Of-Sale (POS), and the like.
The conventional capacitive touch panel includes a data processing module, a driving electrode, an inductive electrode, and the like, wherein the driving electrode and the inductive electrode are electrically connected to the data processing module through respective interfaces. The driving electrode is composed of a plurality of driving electrode strips parallel to each other, and the sensing electrode is composed of a plurality of sensing electrode strips parallel to each other, wherein each driving electrode strip and each sensing electrode strip are vertically arranged to form a plurality of intersections. When the driving electrode is driven by the driving voltage, an electric field is formed between the driving electrode and the induction electrode, so that the induction electrode generates induction charges and has an interaction capacitance, the plurality of driving electrode strips and the plurality of induction electrode strips form a plurality of electric fields, each intersection can be simulated to have an interaction capacitance, and the plurality of intersections form an interaction capacitance array. The interactive capacitor array has a stable capacitance (hereinafter referred to as a substrate capacitor) in a steady-state environment, so that the sensing electrode generates a sensing voltage (the sensing voltage at this time is referred to as a substrate voltage), and the data processing module reads the sensing voltage through the interface. When a finger or other conductive substance approaches the intersection, the electric field at that location will be altered, resulting in a change in induced voltage. After the changed induced voltage is transmitted to the data processing module, the analog-to-digital converter converts the changed induced voltage into a digital signal, and then the digital signal is identified whether the induced voltage is a touch signal through an algorithm, whether the calculation of the touch position is carried out is determined, and then the touch information input data output to the host end is processed and formed. The host is a device controlled by at least one Central Processing Unit (CPU), such as a computer, PDA, etc.
Since the electric field formed between the driving electrode and the sensing electrode is easily interfered by external electromagnetic waves, it is impossible to accurately measure the change of the charge amount transferred by capacitive charging caused by conductive materials such as fingers. Therefore, the prior art uses a signal subtraction method to subtract the noise, which repeats a measurement cycle to obtain more than two different sensing voltage signals for further subtraction. The touch signal with the common mode noise eliminated is obtained by processing more than two different sensing voltage signals through a differential method (differential). Although the general difference method can eliminate the substrate noise, the difference value is calculated by two pairs of sensing signals, which may cause the accuracy or resolution to be reduced due to the touch of foreign objects in the measurement process.
[ summary of the invention ]
In order to overcome the disadvantages of the prior art, the present invention provides the following embodiments to solve the above problems.
The embodiment of the invention provides a sensing method and a sensing module of a touch identification device, which can judge whether a foreign object is positioned on the touch identification device when a touch signal is read and eliminate a noise signal by periodically or real-timely executing a judging program in a general periodic wave difference comparison operation of the sensing method in an inserting way so as to improve the overall sensing accuracy.
In order to achieve one or a part of or all of the above or other objects, an embodiment of the present invention provides a sensing method for a touch recognition device, wherein the touch recognition device includes a plurality of sensing electrodes and a plurality of driving electrodes, the plurality of sensing electrodes and the plurality of driving electrodes intersect to form a plurality of nodes, the sensing method includes the following steps: selecting a first sensing electrode of the plurality of sensing electrodes, and setting the first sensing electrode as a reverse measurement, wherein the first sensing electrode intersects with the plurality of driving electrodes to have a plurality of first nodes; driving one or more driving electrodes, measuring the first sensing electrode to obtain a first measurement value of one or more first nodes, and measuring other sensing electrodes except the first sensing electrode to obtain a plurality of point measurement values of a plurality of nodes; comparing the measured value of each point on the same driving electrode with a variation value of the first measured value; checking whether the variance value is above or below a threshold limit; if the variation value is higher or lower than the threshold limit value, judging that the sensing electrode on the point measurement value is abnormal; and stopping touch measurement when at least one variation value is higher or lower than a threshold value.
In one embodiment, if the number of the sensing electrodes determined to be abnormal is at least two, the touch measurement is stopped.
In one embodiment, if the variation value is not higher or lower than the threshold value, or the number of abnormal sensing electrodes is not two, the touch measurement is performed.
In one embodiment, the step of obtaining the first measurement and the plurality of point measurements further comprises driving one or a portion of the plurality of driving electrodes; measuring the first sensing electrode to obtain a first measurement value of one or more first nodes, and simultaneously or sequentially measuring other sensing electrodes except the first sensing electrode to obtain one or a part of a plurality of point measurement values; stopping driving; driving another or the rest of the plurality of driving electrodes; measuring the first sensing electrode to obtain a first measurement value of one or more first nodes, and simultaneously or sequentially measuring other sensing electrodes except the first sensing electrode to obtain another or rest of the plurality of point measurement values; and repeating the driving operation to obtain all of the plurality of point measurement values and the plurality of first measurement values.
In one embodiment, the step of obtaining the first measurement and the plurality of point measurements further comprises driving all of the plurality of driving electrodes simultaneously; and measuring the first sensing electrode to obtain a first measurement value of all the first nodes, and simultaneously measuring other sensing electrodes except the first sensing electrode to obtain a plurality of point measurement values.
In one embodiment, the method further comprises selecting another of the plurality of sensing electrodes as the first sensing electrode to set the first sensing electrode as a reverse measurement.
In one embodiment, the step of setting the first sensing electrode as a reverse measurement includes electrically connecting the first sensing electrode to a reverse measurement circuit, or a processing unit performs a reverse processing on a signal received through the first sensing electrode in the measurement cycle. The touch measurement further includes electrically connecting the rest of the plurality of sensing electrodes to a positive vector circuit, and performing touch measurement to obtain a touch signal. The touch control measurement step comprises that the reverse measurement circuit sequentially measures with the positive vector measurement circuit to respectively and synchronously obtain a reverse signal and a forward signal; and receiving the reverse signal and the forward signal through an analog-digital conversion circuit to obtain a touch signal through conversion, wherein the phase signals of the forward signal and the reverse signal are 180-degree offset.
In an embodiment, if the variation value is higher than the threshold value, it is determined that a pointing object touches the first sensing electrode.
In one embodiment, if the variation value is lower than the threshold value, it is determined that a non-pointing object touches the first sensing electrode.
In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a sensing module of a touch recognition device, including: a plurality of sensing electrodes including a first sensing electrode configured to measure in a reverse direction; a plurality of driving electrodes having a plurality of nodes crossing the plurality of sensing electrodes and having a plurality of first nodes crossing the first sensing electrodes; the processing unit is electrically connected with the plurality of driving electrodes and the plurality of sensing electrodes and used for driving one or more driving electrodes, measuring the first sensing electrode to obtain a first measuring value of one or more first nodes, and measuring other sensing electrodes except the first sensing electrode to obtain a plurality of point measuring values of the plurality of nodes; the processing unit compares each point measurement value on the same driving electrode with a variation value of each first measurement value; the processing unit checks whether the variance value is higher or lower than a threshold value; if the variation value is higher or lower than the threshold limit value, the processing unit judges that the sensing electrode on the point measurement value is abnormal; and when the at least one variation is higher or lower than the threshold value, the processing unit stops touch measurement. If the variation value is not higher or lower than the threshold limit value or the number of the abnormal sensing electrodes is not two, the processing unit performs touch measurement.
[ description of the drawings ]
Fig. 1 is a schematic view of a sensing module applied to a touch recognition device according to a first embodiment of the invention.
fig. 2 is a flowchart of a sensing method applied to a touch recognition device according to an embodiment of the present invention.
Fig. 3 is a schematic view of a sensing module applied to a touch recognition device according to a first embodiment of the invention.
Fig. 4 is a schematic view of a sensing module applied to a touch recognition device according to a second embodiment of the invention.
Description of the reference numerals
100. 200 sensing module
110. 210 processing unit
120(D1-D7), 220(225A-225D) drive electrodes
130(S1-S4), 230(S1-S7) sense electrodes
[ detailed description ] embodiments
it will be understood by those of ordinary skill in the art that the method provided by the embodiments of the present invention includes steps which are not necessarily performed in the order shown in the embodiments, and the present invention does not limit the order of execution of the steps unless there is a particular dependency between the steps. In addition, other steps may be inserted between the various steps without affecting the spirit provided by the present invention. The embodiments thus derived are also intended to fall within the scope of the present invention.
Referring to fig. 1, a sensing module 100 of a touch recognition device in a first embodiment of the invention is shown. A sensing module 100 of a touch recognition device includes a processing unit 110, a plurality of driving electrodes 120 and a plurality of sensing electrodes 130. In the present embodiment, the driving electrodes 120 include at least 7 driving electrodes D1-D7, and the sensing electrodes 130 include at least 4 sensing electrodes S1-S4. The plurality of driving electrodes 120 and the plurality of sensing electrodes 130 intersect to have a plurality of nodes D1S1, D1S2, D1S3, D1S4, D2S1, D2S2 …, etc. The processing unit 110 is electrically connected to the sensing electrode 130 and the driving electrode 120, and is configured to drive the driving electrode 120 and sense a capacitance change on the sensing electrode 130 to obtain a plurality of point measurement values of a plurality of nodes.
The sensing module 100 is used for executing a sensing method of a touch recognition device in the following embodiments of the present invention.
Fig. 2 is a schematic flow chart of a sensing method of a touch recognition device according to an embodiment of the present invention, and is described with reference to fig. 3 and 4. The sensing method of the embodiment of the invention includes the following steps S100 to S700 to execute the determination procedure and perform the touch measurement in cooperation.
step S100: a first sense electrode of the plurality of sense electrodes S1-S4 is selected. In the present embodiment, the sensing electrode S1 is pre-selected as the first sensing electrode, and the sensing electrode S1 is set for reverse measurement. The first sensing electrode S1 intersects with the plurality of driving electrodes D1-D7 to have a plurality of first nodes D1S1, D2S1, D3S1 …. The step of setting the sensing electrode S1 for reverse measurement includes electrically connecting the sensing electrode S1 to a reverse measurement circuit, so that the processing unit 110 can reverse the signal received by the first sensing electrode S1 in the measurement cycle, for example, multiply by a negative sign, to save the operation time.
Step S200: one or more driving electrodes are driven, the first sensing electrode is measured to obtain a measurement value of one or more first nodes, and then other sensing electrodes except the first sensing electrode are measured to obtain a plurality of point measurement values of other nodes. In this embodiment, the point measurement values of the plurality of nodes or the first node measurement value are variation values generated by the periodic wave driving.
In one embodiment, the step of obtaining the first measurement value and the plurality of point measurement values further comprises: driving one or a part of the driving electrodes; measuring the first sensing electrode to obtain a first measurement value of one or more first nodes, and simultaneously or sequentially measuring other sensing electrodes except the first sensing electrode to obtain one or a part of a plurality of point measurement values; stopping driving; driving another or the rest of the plurality of driving electrodes; measuring the first sensing electrode to obtain a first measurement value of one or more first nodes, and simultaneously or sequentially measuring other sensing electrodes except the first sensing electrode to obtain another or rest of the plurality of point measurement values; and repeating the driving operation to obtain all the point measurement values and the first measurement value.
In the first embodiment, as shown in fig. 3, the dot measurements of the different nodes D1S1, D1S2, D1S3, and D1S4 are obtained sequentially from the driving electrode D1, which includes a first measurement of the first node D1S 1. Then, the driving electrode D2 is sequentially driven along the arrow direction to obtain point measurement values of different nodes D2S1, D2S2, D2S3, and D2S4, which include the first measurement value of the first node D2S 1. Then, the driving electrodes D3 and D4 are sequentially driven to obtain dot measurement values of all the nodes D3S1, D3S2, D3S3, D3S4, D4S1, D4S2, D4S3, and D4S 4.
Fig. 4 is a sensing module 200 of a touch recognition device according to a second embodiment of the invention. The sensing module 200 includes a processing unit 210, a plurality of driving electrodes 220 and a plurality of sensing electrodes 230. The processing unit 210 is electrically connected to the sensing electrode 230 and the driving electrode 220. In the present embodiment, the driving electrode 220 is divided into four portions, i.e., the first driving electrodes 225A-225D, and the sensing electrode 230 includes at least 7 sensing electrodes S1-S7. The plurality of drive electrodes 220 and the plurality of sense electrodes 230 intersect to have a plurality of nodes, and yet the selected sense electrode S1 is the first sense electrode. In the second embodiment, the first partial driving electrode 225A is activated to sequentially obtain point measurements of different nodes 225AS1, 225AS2, 225AS3 …, etc., including a first measurement of the first node D1S 1. Then, the second partial driving electrode 225B, the third partial driving electrode 225C and the fourth partial driving electrode 225D are sequentially driven along the arrow direction, and the dot measurement values of all the nodes are obtained.
In the above embodiment of step S200, the present invention is not limited to obtaining all the point measurement values and the first measurement values in this step, one or a part of the driving electrodes may be driven first, and the first measurement values of the first sensing electrodes and the point measurement values of the plurality of nodes of one or a part of the sensing electrodes may be obtained, and then the next steps S300-S400 may be performed, and the step S200 is returned to obtain all the point measurement values and the first measurement values.
in one embodiment, referring again to fig. 3, the driving electrode D1 is first activated to obtain point measurements of different nodes D1S1, D1S2, D1S3, and D1S4 in sequence, including a first measurement of the first node D1S 1. Then, the driving electrode D4 is directly selected and driven for the second time in the direction of the black arrow, so as to obtain the point measurement values of the different nodes D4S1, D4S2, D4S3, and D4S4, which include the first measurement value of the first node D4S 1. Then, the skip-select driving is continued to the other driving electrodes. The second driving can directly jump and select the driving electrode D4, namely, the driving electrode D1 is separated by 3 driving electrodes; the present invention is not limited to this embodiment, and the driving electrodes D5 or D6 with 4-5 phase difference can be selected or skipped to speed up the response time of the sensing method.
in another embodiment, the step of obtaining the first measurement value and the plurality of point measurement values further comprises: simultaneously driving all of the plurality of driving electrodes; and measuring the first sensing electrode to obtain a first measurement value of all the first nodes, and simultaneously measuring other sensing electrodes except the first sensing electrode to obtain a plurality of point measurement values.
Step S300: comparing the measured value of each point on the same driving electrode with a variation value of the first measured value. In the first embodiment shown in fig. 2, after the driving electrode D1 is driven in step S200, the variation values of the first measurement value of the first node D1S1 and the other nodes D1S2, D1S3, and D1S4 are sequentially obtained, and then step S400 is performed; alternatively, after the driving electrode D2 is driven again, the first measurement value of the first node D2S1 and the variation values of the other nodes D2S2, D2S3, and D2S4 are sequentially obtained, and the step S400 is performed.
Step S400: it is checked whether the variance value obtained in step S300 is higher or lower than a threshold value set by the sense module. The measurement value sensed by the sensing electrode is a variation generated by the periodic wave driving, and the difference between the two is compared by steps S300-S400. When a non-pointing object such as a finger or a stylus touches the sensing module, if the sensing module determines whether there is a touch of other foreign objects, the periodic wave driving variation attenuation comparison is performed, since the sensing measurement value is attenuated by the touch or the non-pointing object (such as water stain), the above steps are performed to observe and determine whether the attenuation is caused by the non-pointing object. If the variation value is higher than the threshold value, it is determined that the pointing object touches the first sensing electrode. If the variation value is lower than the threshold value, a non-pointing object is judged to touch the first sensing electrode.
Step S500: and if the variation value is higher or lower than the threshold limit value, judging that the sensing electrode on the point measurement value is abnormal. As shown in FIG. 3, since the variance of the nodes D1S2 and D4S3 and the first nodes D1S1 and D4S1 are higher or lower than the threshold, the sensing electrodes S2 and S3 are determined to be abnormal. AS shown in fig. 4, since the variation values of the node regions 225AS2 and 225CS4 and the first nodes 225AS1 and 225CS1 are higher or lower than the threshold value, the sensing electrodes S2 and S4 are determined to be abnormal.
Step S600: step S500 is continued, and when at least one variation value is higher or lower than the threshold value, a touch measurement is stopped. In a preferred embodiment, the number of the sensing electrodes determined to be abnormal is at least two, and the touch measurement is stopped.
when the first sensing electrode is judged to be touched by a finger or a foreign matter is on the first sensing electrode, the newly read point measurement value is used for covering the old read point measurement value according to the previously obtained measurement value signal of the node; or the old spot measurements may be discarded directly.
Step S700: in step S600, another sensing electrode of the plurality of sensing electrodes is selected as the first sensing electrode and set as a reverse measurement. The above steps S100 to S600 are repeated to re-execute the determination procedure.
the judgment procedure of the sensing method can adopt periodic detection or real-time detection. If the periodic detection is adopted, after a plurality of touch measurement is executed, the judgment procedure is executed once to scan the whole panel so as to confirm whether the sensing electrode selected as the reverse measurement is proper or not; if real-time detection is adopted, the judgment is carried out after the attenuation of the periodic wave variation of each time under the touch measurement is compared. When the periodic wave variation attenuation comparison is performed on the obtained node signal, the variation value is determined according to the conditions set by the touch system to determine whether the first sensing electrode as the reverse measurement is touched, and then other signal processing or determination, such as point reporting, is performed.
Step S510: continuing to step S400, if the variation value is not higher or lower than the threshold value, or the number of abnormal sensing electrodes is not two, performing touch measurement. In this embodiment, in addition to electrically connecting the sensing electrode S1 to a reverse measurement circuit, the touch measurement further includes: the rest of the sensing electrodes are electrically connected to a positive vector circuit, and touch measurement is performed to obtain a touch signal. The step of performing touch measurement includes: the reverse measurement circuit sequentially measures with the positive measurement circuit to synchronously obtain a reverse signal and a forward signal; and receiving the reverse signal and the forward signal through an analog-digital conversion circuit to obtain a touch signal through conversion, wherein the phase signals of the forward signal and the reverse signal are 180-degree offset.
The embodiment of the invention provides a sensing method and a sensing module of a touch identification device, which can judge whether foreign matters are positioned on the touch identification device when a touch signal is read and the sensing module thereof by periodically or real-timely executing a judging program in the periodic wave variation attenuation comparison operation of the sensing method in an inserting way so as to improve the integral sensing accuracy.
the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; all equivalent changes and modifications that do not depart from the spirit of the invention as disclosed are intended to be included within the scope thereof as defined by the appended claims.
Claims (13)
1. a sensing method of a touch recognition device, wherein the touch recognition device includes a plurality of sensing electrodes and a plurality of driving electrodes, the plurality of sensing electrodes and the plurality of driving electrodes meet to have a plurality of nodes, the sensing method comprising the steps of:
Selecting a first sensing electrode of the plurality of sensing electrodes and setting the first sensing electrode as a reverse measurement, wherein the first sensing electrode intersects the plurality of driving electrodes to have a plurality of first nodes;
Driving one or more driving electrodes, measuring the first sensing electrode to obtain a first measurement value of one or more first nodes, and measuring other sensing electrodes except the first sensing electrode to obtain a plurality of point measurement values of the plurality of nodes;
comparing a variation value between each point measurement value on the same driving electrode and the first measurement value respectively;
Checking whether the variance value is above or below a threshold limit;
if the variation value is higher or lower than the threshold limit value, judging that the sensing electrode on the point measurement value is abnormal; and the number of the first and second groups,
and stopping touch measurement when at least one variation value is higher or lower than the threshold value.
2. The sensing method as claimed in claim 1, wherein the number of the sensing electrodes determined to be abnormal is at least two, and the touch measurement is stopped.
3. The sensing method of claim 1, wherein the touch measurement is performed if the variance is not higher or lower than the threshold or the number of abnormal sensing electrodes is not two.
4. The sensing method of claim 1, wherein the step of obtaining the first measurement and the plurality of point measurements further comprises:
driving one or a part of the plurality of driving electrodes;
Measuring the first sensing electrode to obtain the first measurement value of one or more first nodes, and simultaneously or sequentially measuring other sensing electrodes except the first sensing electrode to obtain one or a part of the plurality of point measurement values;
Stopping driving;
Driving another or the rest of the plurality of driving electrodes;
measuring the first sensing electrode to obtain the first measurement value of one or more first nodes, and simultaneously or sequentially measuring other sensing electrodes except the first sensing electrode to obtain another or rest of the plurality of point measurement values; and the number of the first and second groups,
Repeating the driving operation to obtain all the plurality of point measurement values and the plurality of first measurement values.
5. The sensing method of claim 1, wherein the step of obtaining the first measurement and the plurality of point measurements further comprises:
Simultaneously driving all of the plurality of driving electrodes;
Measuring the first sensing electrode to obtain the first measurement value of all the first nodes; and the number of the first and second groups,
And simultaneously measuring the other sensing electrodes except the first sensing electrode to obtain all the plurality of point measurement values.
6. The method as claimed in claim 1, further comprising selecting another one of the plurality of sensing electrodes as the first sensing electrode to set the first sensing electrode as a reverse measure.
7. the method of claim 1, wherein the step of setting the first sensing electrode as a reverse measurement comprises electrically connecting the first sensing electrode to a reverse measurement circuit or a processing unit reversing the signal received via the first sensing electrode during the measurement cycle.
8. The sensing method of claim 7, further comprising electrically connecting the rest of the plurality of sensing electrodes to a positive vector circuit and performing the touch measurement to obtain a touch signal.
9. The sensing method of claim 8, wherein the touch measurement comprises:
The reverse measurement circuit sequentially measures with the positive measurement circuit to synchronously obtain a reverse signal and a forward signal respectively; and the number of the first and second groups,
and receiving the reverse signal and the forward signal through an analog-digital conversion circuit to convert to obtain a touch signal, wherein the phase signals of the forward signal and the reverse signal are 180-degree offset.
10. The sensing method of claim 1, wherein if the variance is higher than the threshold, it is determined that a pointing object touches the first sensing electrode.
11. The sensing method of claim 1, wherein if the variance is lower than the threshold, it is determined that a non-pointing object touches the first sensing electrode.
12. A sensing module of a touch recognition device, comprising:
A plurality of sensing electrodes including a first sensing electrode configured to measure in a reverse direction;
A plurality of driving electrodes having a plurality of nodes intersecting the plurality of sensing electrodes, and having a plurality of first nodes intersecting the first sensing electrode; and the number of the first and second groups,
a processing unit electrically connected to the plurality of driving electrodes and the plurality of sensing electrodes for driving one or more driving electrodes, measuring the first sensing electrode to obtain a first measurement value of one or more first nodes, and measuring other sensing electrodes except the first sensing electrode to obtain a plurality of point measurement values of the plurality of nodes;
The processing unit compares each point measurement value on the same driving electrode with a variation value of each first measurement value; the processing unit checks whether the variance value is above or below a threshold value; if the variation value is higher or lower than the threshold limit value, the processing unit judges that the sensing electrode on the point measurement value is abnormal; and when at least one variation is higher or lower than the threshold value, the processing unit stops touch measurement.
13. The sensing module of claim 12, wherein the processing unit performs the touch measurement if the variance is not higher or lower than the threshold or the number of abnormal sensing electrodes is not two.
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| TW107118790A TWI763859B (en) | 2018-05-31 | 2018-05-31 | Sensing method of touch recognition device and sensing module thereof |
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| US20150077389A1 (en) * | 2013-09-13 | 2015-03-19 | Apex Material Technology Corp. | Touch recognition method and system for a capacitive touch apparatus |
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| CN107015684A (en) * | 2015-11-13 | 2017-08-04 | 意象无限股份有限公司 | Sensing method and sensing circuit of touch panel |
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| TW202004445A (en) | 2020-01-16 |
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