CN102253778A - Method for positioning capacitance sensor - Google Patents
Method for positioning capacitance sensor Download PDFInfo
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- CN102253778A CN102253778A CN2011102069898A CN201110206989A CN102253778A CN 102253778 A CN102253778 A CN 102253778A CN 2011102069898 A CN2011102069898 A CN 2011102069898A CN 201110206989 A CN201110206989 A CN 201110206989A CN 102253778 A CN102253778 A CN 102253778A
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Abstract
The invention discloses a method for positioning a capacitance sensor. The method comprises the following steps: firstly, gradually and sequentially scanning adjacent positive touch control electrodes or adjacent negative touch control electrodes, and acquiring a capacitance difference of the adjacent positive touch control electrodes or the adjacent negative touch control electrodes to serve as a first group of data; then, gradually and sequentially scanning adjacent electrode groups, and acquiring the capacitance difference of the adjacent electrode groups to serve as a second group of data; and finally, calculating the coordinates of a position X and the coordinates of a position Y by using the first group of data and the second group of data. According to the method, the coordinates of a touch position can be judged just by scanning twice to acquire two groups of data, so that number of scanning times is reduced, scanning time is saved, and the coordinates of the touch position can be judged simply and rapidly.
Description
Technical field
The present invention relates to a kind of localization method of sensor, refer in particular to a kind of localization method of capacitive transducer.
Background technology
A kind of capacitive transducer utilizes the principle of electric capacity to transmit signal on directions X and the Y direction, can be the ITO(indium tin oxide) layer, pcb board, keyboard or touch-screen etc., usually by people's finger or pointer actuating.Capacitive transducer is arranged with the touch-control electrode of multirow or multiple row usually, finger or pointer can make the electric capacity of described touch-control electrode change, by scanning each touch-control electrode, detect the variable quantity detecting finger of described each touch-control electrode or the particular location of pointer touching touch-screen.Existing scan method need repeatedly scan at definite X-axis coordinate time, determine the Y-axis coordinate time because the configuration mode difference of touch-control electrode, need carry out scanning again, and calculate the X-axis coordinate time, the Y-axis scanning result is not effectively utilized, scanning times is many, and sweep time is long.
Therefore need be for users provide a kind of scanning times few, sweep time, short localization method solved above problem.
Summary of the invention
The actual technical matters to be solved of the present invention is how to provide a kind of scanning times few, the localization method that sweep time is short.
In order to realize above-mentioned purpose of the present invention, the invention provides a kind of localization method of capacitive transducer, wherein said capacitive transducer comprises a plurality of electrode groups, described electrode group comprises positive touch-control electrode and negative touch-control electrode, the localization method step of described capacitive transducer is as follows: at first, adjacent positive touch-control electrode or the negative touch-control electrode of sequential scanning obtains the adjacent positive touch-control electrode or the electric capacity difference of negative touch-control electrode one by one, writes down first group of data; Then, the adjacent electrode group of sequential scanning is one by one obtained the electric capacity difference of adjacent electrode group, writes down second group of data; At last, utilize first group of data and second group of data computation X position coordinates and Y position coordinates.
Compared with prior art, the present invention only need obtain two groups of data by twice scanning and judge touch position coordinates, has reduced scanning times, has saved sweep time, can judge the coordinate of touch location simply fast.
Description of drawings
Fig. 1 is the structural drawing according to single-layer electrodes of the present invention.
Fig. 2 is the variation diagram of induction amount behind the touch-control according to the present invention.
Fig. 3 is the method flow diagram of detecting according to the present invention on the Y direction.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
The scanning configuration that the localization method of capacitive transducer of the present invention is related, having the single-layer electrodes group that is laid in a side is single-layer electrodes, please refer to the structural drawing of electrode layer shown in Figure 11, described electrode layer 1 comprises a plurality of electrode groups 10 and the control chip 13 that is connected by lead with electrode group 10.Described each electrode group 10 all has two touch-control electrodes, is respectively positive touch-control electrode 11 and negative touch-control electrode 12.Described positive touch-control electrode 11 is arranged in opposite directions with described negative touch-control electrode 12, and the electrode on direction is laid in the void area between another direction electrode respectively.
The present invention obtains two groups of data by adopting the difference configuration to described electrode layer 1, by handling of two groups of data drawn touch location.Below in detail introduction how to obtain two groups of data and two groups of processing method of data:
For first group of data, need scan two touch- control electrodes 11,12 simultaneously to described electrode layer 1 line by line or by column scan at every turn, obtain the electric capacity difference of two touch- control electrodes 11,12 then.Specifically: if described electrode layer 1 total N electrode group 10 scans earlier described positive touch-control electrode 11 one by one, i.e. positive touch-control electrode 11 in first electrode group 10 of elder generation's scanning is till the positive touch-control electrode 11 that scans last electrode group 10.Concrete, during to 11 scannings of the positive touch-control electrode in the described electrode group 10, scanning is for the first time held the positive touch-control electrode 11 in first electrode group 10 as scanning S, the positive touch-control electrode 11 of second the electrode group adjacent with first electrode group 10 of order is as holding with reference to R, negative touch-control electrode 12 and all unsettled or equal ground connection of other electrode group 10 in this moment first electrode group 10 and second the electrode group 10, according to described scanning configuration, finishing for the first time, scanning obtains first group of data X11.In like manner, scanning is for the second time held the positive touch-control electrode 11 in second electrode group 10 as S, the positive touch-control electrode 11 of tactic the 3rd electrode group 10 is as holding with reference to R, negative touch-control electrode 12 and all unsettled or equal ground connection of other electrode group 10 in this moment second electrode group 10 and the 3rd the electrode group 10, according to described scanning configuration, finishing for the second time, scanning obtains second group of data X12.Order is analogized successively, till obtaining N-1 group data X1 (N-1).Finished scanning like this, obtained first group of data positive touch-control electrode 11 in the described electrode layer 1 electrode group 10.
First group of data not only can obtain by the positive touch-control electrode 11 of scanning, also can scan negative touch-control electrode 12 obtains, concrete, touch-control electrode 12 is born in scanning one by one, promptly the negative touch-control electrode 12 from first electrode group 10 is scanned up to till the negative touch-control electrode 12 of last electrode group 10, during equally to 12 scannings of the negative touch-control electrode in the described electrode group 10, scanning is for the first time held the negative touch-control electrode 12 in first electrode group 10 as scanning S, the positive touch-control electrode 11 of second the electrode group adjacent with first electrode group 10 of order is as holding with reference to R, positive touch-control electrode 11 and all unsettled or equal ground connection of other group electrode 10 in this moment 10 groups at first electrode group 10 and second electrode, according to described scanning configuration, finishing for the first time, scanning obtains first group of data X21.In like manner, scanning is for the second time held the negative touch-control electrode 12 in second electrode group 10 as scanning S, the positive touch-control electrode 11 of tactic the 3rd electrode group 10 is as holding with reference to R, positive touch-control electrode 11 and all unsettled or equal ground connection of other electrode group 10 in this moment second electrode group 10 and the 3rd the electrode group 10, according to described scanning configuration, finishing for the second time, scanning obtains second group of data X22.Order is analogized successively, till obtaining (N-1) group data X2 (N-1).
For second group of data, need scan two adjacent electrode groups 10 simultaneously to described electrode layer 1 scanning, obtain the electric capacity difference between the two electrode groups 10 then.Concrete, as scanning S end, will all regard a rectangle as this moment by each electrode group 10 that positive touch-control electrode 11 and negative touch-control electrode 12 constitute, i.e. positive and negative touch-control electrode mutual conduction in each electrode group 10 with first electrode group 10 in the described electrode layer 1; Tactic second electrode group 10 as with reference to the R end, when scanning for the first time, organized all unsettled or equal ground connection of electrode with tactic other; When scanning for the second time, with second electrode group 10 in the described electrode layer 1 as scanning S end, will tactic the 3rd electrode group 10 as holding with reference to R, all unsettled or equal ground connection of other electrode group 10 at this moment; Order is analogized successively, obtains second group of data.Second group of data put in order the oscillogram that will obtain the near sinusoidal curve, as shown in Figure 2.
The acquisition of second group of data is not limited to aforesaid way, also described first and second electrode group 10 all can be held as scanning S, at this moment, tactic the 3rd and the 4th electrode group 10 are all as holding with reference to R, the all unsettled or equal ground connection of other electrode group, the same order is successively analogized.
Just can judge touch object at the X position coordinates according to above-mentioned first group of data and second group of data that obtain, specifically, with first group of data sum and that the figure that second group of data obtain is carried out the data that integration obtains is relevant, described first group of data sum obtained data sum SX1 (n-1) by described positive touch-control electrode 11 scanning backs or described negative touch-control electrode 12 scanning backs are obtained data sum SX2 (n-1), be that the X position coordinates is that first group of data sum carried out the data that integration obtains divided by the figure that second group of data obtained, multiplication by constants C determines and gets again, wherein constant C is the relevant constant of resolution, can adjust according to the result.
And need adopt and above-mentioned diverse ways for the Y position coordinates, following mask body is discussed: please in conjunction with referring to figs. 2 and 3 shown in, in second group of data of described scanning, need to detect the data that described electrode group 10 scanning backs produce, find out the maximum in the data, the minimum influence value of producing on the sweep trace that described electrode group connected respectively, do further to judge and handle according to the maximum that is obtained, minimum influence value then.Be located on the sweep trace that the electrode group 10 on the described electrode layer 1 connected and all detected data, and maximum influence value M and minimum influence value N have occurred, wherein, maximum influence value M be on the occasion of, minimum influence value N is a negative value; Then judge then with sweep trace that the electrode group is connected on the maximum influence value M that produced whether greater than the positive threshold influence value M0 of preset in advance, whether the minimum influence value N that is produced is less than the negative threshold influence value N0 of preset in advance, whether promptly judge maximum influence value M greater than positive threshold influence value M0, whether minimum influence value N is less than negative threshold influence value N0 simultaneously; If satisfy above-mentioned two conditions, then continue again to check whether pass through zero influence value between above-mentioned maximum, minimum influence value M, the N; If passed through zero influence value between adjacent arbitrarily maximum, minimum influence value M, the N, then show the touch object touching is arranged, and the point that passes through zero influence value is exactly the touch points position coordinates, as can be seen from Figure 2, having only influence value is to have satisfied the condition of passing through zero influence value between the maximum of M and N, the minimum influence value, illustrate that then there is the touch object touching this position, and this position of passing through zero influence value promptly is the Y position coordinates that touch object is touched described capacitive transducer.At last, can obtain the coordinate of touch location in conjunction with the X position coordinates that obtains.
Compared with prior art, the present invention only need obtain two groups of data by twice scanning and judge touch position coordinates, has reduced scanning times, has saved sweep time, can judge the coordinate of touch location simply fast.
The present invention is not limited to the foregoing description, as: as described in the identical and quantity of the quantity of positive touch-control electrode and negative touch-control electrode is greater than one in the electrode group, described positive touch-control electrode and described negative touch-control electrode are in opposite directions and alternately.
Claims (10)
1. the localization method of a capacitive transducer, wherein said capacitive transducer comprises a plurality of electrode groups, and described electrode group comprises positive touch-control electrode and negative touch-control electrode, and the localization method step of described capacitive transducer is as follows:
At first, adjacent positive touch-control electrode or the negative touch-control electrode of sequential scanning obtains the adjacent positive touch-control electrode or the electric capacity difference of negative touch-control electrode one by one, writes down first group of data;
Then, the adjacent electrode group of sequential scanning is one by one obtained the electric capacity difference of adjacent electrode group, writes down second group of data;
At last, utilize first group of data and second group of data computation X position coordinates and Y position coordinates.
2. the localization method of capacitive transducer as claimed in claim 1 is characterized in that: described X position coordinates and described Y position coordinates follow the figure that obtains according to described first group of data sum and second group of data to try to achieve.
3. the localization method of capacitive transducer as claimed in claim 2, it is characterized in that: it is relevant that described X position coordinates and the figure that described second group of data are obtained carry out the data that integration obtains, and the position of passing through zero influence value in described Y position coordinates and the figure that second group of data obtains is relevant.
4. the localization method of capacitive transducer as claimed in claim 1 or 2 is characterized in that: during the positive touch-control electrode of described scan electrode group, and all unsettled or equal ground connection of negative touch-control electrode of described electrode group.
5. the localization method of capacitive transducer as claimed in claim 4, it is characterized in that: hold as scanning as if the positive touch-control electrode in the electrode group, and the positive touch-control electrode of tactic adjacent electrode group is as with reference to end, negative touch-control electrode and all unsettled or equal ground connection of other group electrode in this moment above-mentioned two electrode groups.
6. the localization method of capacitive transducer as claimed in claim 1 or 2 is characterized in that: described X position coordinates is that described first group of data sum carried out the data that integration obtains divided by the figure that second group of data obtained, and multiplication by constants is determined and got again.
7. the localization method of capacitive transducer as claimed in claim 6, it is characterized in that: described constant is the constant relevant with resolution, can adjust according to the result.
8. the localization method of capacitive transducer as claimed in claim 1 or 2, it is characterized in that: described Y position coordinates need be with the positive and negative touch-control electrode mutual conduction of described electrode group, and an electrode group is as the scanning end, and the electrode group that is adjacent is as with reference to end.
9. the localization method of capacitive transducer as claimed in claim 8, it is characterized in that: described Y coordinate is that maximum influence value and minimum influence value have appearred in the data that detect on the sweep trace that is connected according to the electrode group, and less than predetermined minimum, the position of passing through zero influence value between so described maximum, the minimum influence value is exactly the location point coordinate to maximum influence value greater than preset maximum value, minimum influence value.
10. the localization method of capacitive transducer as claimed in claim 1 or 2, it is characterized in that: the identical and quantity of the quantity of positive touch-control electrode and negative touch-control electrode is greater than one in the described electrode group, and described positive touch-control electrode and described negative touch-control electrode are in opposite directions and alternately.
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| CN 201110206989 CN102253778B (en) | 2011-07-22 | 2011-07-22 | Method for positioning capacitance sensor |
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| CN 201110206989 CN102253778B (en) | 2011-07-22 | 2011-07-22 | Method for positioning capacitance sensor |
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| CN102253778B CN102253778B (en) | 2013-06-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107346196A (en) * | 2017-06-08 | 2017-11-14 | 深圳信炜科技有限公司 | Capacitance-type sensing device and electronic equipment |
| CN112005206A (en) * | 2018-04-20 | 2020-11-27 | 互动景观有限责任公司 | Control and processing unit for a touch-sensitive screen, system with such a control and processing unit and method of use |
| CN113692569A (en) * | 2020-03-17 | 2021-11-23 | 京东方科技集团股份有限公司 | Touch positioning method and device |
| CN113867562A (en) * | 2021-08-18 | 2021-12-31 | 荣耀终端有限公司 | Touch screen point reporting correction method and device and electronic equipment |
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| CN101299175A (en) * | 2007-04-20 | 2008-11-05 | 精工爱普生株式会社 | Coordinate input device and display device |
| WO2011006881A1 (en) * | 2009-07-17 | 2011-01-20 | Aktiebolaget Skf | Thrust bearing and suspension for vehicle |
| WO2011068810A1 (en) * | 2009-12-01 | 2011-06-09 | Shire Human Genetic Therapies | Delivery of mrna for the augmentation of proteins and enzymes in human genetic diseases |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299175A (en) * | 2007-04-20 | 2008-11-05 | 精工爱普生株式会社 | Coordinate input device and display device |
| WO2011006881A1 (en) * | 2009-07-17 | 2011-01-20 | Aktiebolaget Skf | Thrust bearing and suspension for vehicle |
| WO2011068810A1 (en) * | 2009-12-01 | 2011-06-09 | Shire Human Genetic Therapies | Delivery of mrna for the augmentation of proteins and enzymes in human genetic diseases |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107346196A (en) * | 2017-06-08 | 2017-11-14 | 深圳信炜科技有限公司 | Capacitance-type sensing device and electronic equipment |
| CN107346196B (en) * | 2017-06-08 | 2020-04-07 | 深圳信炜科技有限公司 | Capacitive sensing device and electronic equipment |
| CN112005206A (en) * | 2018-04-20 | 2020-11-27 | 互动景观有限责任公司 | Control and processing unit for a touch-sensitive screen, system with such a control and processing unit and method of use |
| CN113692569A (en) * | 2020-03-17 | 2021-11-23 | 京东方科技集团股份有限公司 | Touch positioning method and device |
| CN113692569B (en) * | 2020-03-17 | 2024-01-23 | 京东方科技集团股份有限公司 | Touch positioning method and device |
| CN113867562A (en) * | 2021-08-18 | 2021-12-31 | 荣耀终端有限公司 | Touch screen point reporting correction method and device and electronic equipment |
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| CN102253778B (en) | 2013-06-19 |
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