CN102253778B - Method for positioning capacitance sensor - Google Patents
Method for positioning capacitance sensor Download PDFInfo
- Publication number
- CN102253778B CN102253778B CN 201110206989 CN201110206989A CN102253778B CN 102253778 B CN102253778 B CN 102253778B CN 201110206989 CN201110206989 CN 201110206989 CN 201110206989 A CN201110206989 A CN 201110206989A CN 102253778 B CN102253778 B CN 102253778B
- Authority
- CN
- China
- Prior art keywords
- group
- electrode
- touch
- control electrode
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Position Input By Displaying (AREA)
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 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 to be carried out Multiple-Scan at definite X-axis coordinate time, determine that the Y-axis coordinate time is because the configuration mode of touch-control electrode is different, need to 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 to 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, successively adjacent positive touch-control electrode or the negative touch-control electrode of sequential scanning, obtain adjacent positive touch-control electrode or the electric capacity difference of negative touch-control electrode, records first group of data, then, the adjacent electrode group of sequential scanning is successively obtained the electric capacity difference of adjacent electrode group, records second group of data, at last, utilize first group of data and second group of data to calculate X position coordinates and Y position coordinates, described X coordinate is that described first group of data sum carries out divided by the figure to second group of data acquisition the data that integration obtains, multiplication by constants is determined and is got again, described Y coordinate is that maximum influence value and minimum influence value have appearred in the data that detect on the sweep trace that connects according to the electrode group, and maximum influence value is greater than preset maximum value, minimum influence value is less than predetermined minimum, so described maximum, the position of passing through zero influence value between minimum influence value is exactly the location point coordinate.
Compared with prior art, the present invention only needs to obtain two groups of data by twice sweep and judges touch position coordinates, has reduced scanning times, has saved sweep time, the coordinate of judging touch location that can Simple 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 after touch-control according to the present invention.
Fig. 3 is the method flow diagram of detecting according to the present invention on 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 wire 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 respectively the void area between another direction electrode.
The present invention is by adopting the difference configuration to described electrode layer 1 to obtain two groups of data, by processing of two groups of data drawn touch location.Below in detail introduction how to obtain the disposal route of two groups of data and two groups of data:
For first group of data, need to scan simultaneously two touch- control electrodes 11,12 to the 1 progressively or column by column scanning of described electrode layer at every turn, then obtain two touch- control electrodes 11,12 electric capacity difference.Specifically: if total N the electrode group 10 of described electrode layer 1 first successively scans described positive touch-control electrode 11, namely first scan the positive touch-control electrode 11 in first electrode group 10 until till scanning the positive touch-control electrode 11 of last electrode group 10.Concrete, during to positive touch-control electrode 11 scanning in described electrode group 10, scan for the first time the positive touch-control electrode 11 in first electrode group 10 as scanning S end, 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 in this moment first electrode group 10 and second electrode group 10 and other electrode group 10 be unsettled or equal ground connection all, according to described scanning configuration, completing for the first time, scanning obtains first group of data X11.In like manner, scan for the second time the positive touch-control electrode 11 in second electrode group 10 is held 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 in this moment second electrode group 10 and the 3rd electrode group 10 and other electrode group 10 be unsettled or equal ground connection all, according to described scanning configuration, completing for the second time, scanning obtains second group of data X12.Order is analogized successively, until obtain N-1 group data X1 (N-1).Complete like this scanning to positive touch-control electrode 11 in described electrode layer 1 electrode group 10, obtained first group of data.
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, successively touch-control electrode 12 is born in scanning, till namely the negative touch-control electrode 12 from first electrode group 10 is scanned up to the negative touch-control electrode 12 of last electrode group 10, during equally to negative touch-control electrode 12 scanning in described electrode group 10, scan for the first time the negative touch-control electrode 12 in first electrode group 10 as scanning S end, 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 in this moment 10 groups, first electrode group 10 and second electrode and other group electrode 10 be unsettled or equal ground connection all, according to described scanning configuration, completing for the first time, scanning obtains first group of data X21.In like manner, scan for the second time the negative touch-control electrode 12 in second electrode group 10 as scanning S end, 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 in this moment second electrode group 10 and the 3rd electrode group 10 and other electrode group 10 be unsettled or equal ground connection all, according to described scanning configuration, completing for the second time, scanning obtains second group of data X22.Order is analogized successively, until obtain (N-1) group data X2 (N-1).
For second group of data, need to scan simultaneously two adjacent electrode groups 10 to described electrode layer 1 scanning, then obtain the electric capacity difference between two electrode groups 10.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 consist of, i.e. positive and negative touch-control electrode mutual conduction in each electrode group 10 with first electrode group 10 in 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 described electrode layer 1 as scanning S end, will tactic the 3rd electrode group 10 as holding with reference to R, the equal 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 arranged 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, other electrode group is unsettled or equal ground connection all, and 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 of second group of data acquisition is carried out the data that integration obtains is relevant, described first group of data sum obtained data sum SX2 (n-1) by rear acquisition of described positive touch-control electrode 11 scannings after data sum SX1 (n-1) or 12 scannings of described negative touch-control electrode, be that the X position coordinates is that first group of data sum carries out divided by the figure to second group of data acquisition the data that integration obtains, multiplication by constants C determines and gets again, wherein constant C is the relevant constant of resolution, can adjust according to result.
And need to adopt and above-mentioned diverse ways for the Y position coordinates, lower 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 produce after described electrode group 10 scannings, find out respectively the maximum in data, the minimum influence value of producing on the sweep trace that described electrode group connects, then do further judgement and process according to the maximum that obtains, minimum influence value.Be located on the sweep trace that the electrode group 10 on described electrode layer 1 connects 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 negative value; Whether the maximum influence value M that then then produces on judgement and sweep trace that the electrode group is connected is greater than the positive threshold influence value M0 of preset in advance, whether the minimum influence value N that produces is less than the negative threshold influence value N0 of preset in advance, whether namely 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, continue again to check whether pass through zero influence value between above-mentioned maximum, minimum influence value M, N; If passed through zero influence value between the maximum of arbitrary neighborhood, minimum influence value M, N, 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, only having influence value is to have satisfied the condition of passing through zero influence value between the maximum of M and N, minimum influence value, illustrate that there is the touch object touching this position, and this position of passing through zero influence value is namely the Y position coordinates of the described capacitive transducer of touch object touching.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 needs to obtain two groups of data by twice sweep and judges touch position coordinates, has reduced scanning times, has saved sweep time, the coordinate of judging touch location that can Simple fast.
The present invention is not limited to above-described embodiment, 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 (6)
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, successively adjacent positive touch-control electrode or the negative touch-control electrode of sequential scanning, obtain adjacent positive touch-control electrode or the electric capacity difference of negative touch-control electrode, records first group of data;
Then, the adjacent electrode group of sequential scanning is successively obtained the electric capacity difference of adjacent electrode group, records second group of data;
at last, utilize first group of data and second group of data to calculate X position coordinates and Y position coordinates, described X coordinate is that described first group of data sum carries out divided by the figure to second group of data acquisition the data that integration obtains, multiplication by constants is determined and is got again, described Y coordinate is that maximum influence value and minimum influence value have appearred in the data that detect on the sweep trace that connects according to the electrode group, and maximum influence value is greater than preset maximum value, minimum influence value is less than predetermined minimum, so described maximum, the position of passing through zero influence value between minimum influence value is exactly the location point coordinate.
2. the localization method of capacitive transducer as claimed in claim 1 is characterized in that: during the positive touch-control electrode of scan electrode group, the negative touch-control electrode of described electrode group is unsettled or equal ground connection all.
3. the localization method of capacitive transducer as claimed in claim 2, it is characterized in that: if the positive touch-control electrode in electrode group is as scanning end, and the positive touch-control electrode of tactic adjacent electrode group is as with reference to end, and the negative touch-control electrode in this moment above-mentioned two electrode groups and other group electrode be unsettled or equal ground connection all.
4. the localization method of capacitive transducer as claimed in claim 1, it is characterized in that: described constant is the constant relevant with resolution, can adjust according to result.
5. the localization method of capacitive transducer as claimed in claim 1, it is characterized in that: described Y position coordinates need to be with the positive and negative touch-control electrode mutual conduction of described electrode group, and an electrode group is as scanning end, and the electrode group that is adjacent is as with reference to end.
6. the localization method of capacitive transducer as claimed in claim 1 is characterized in that: in described electrode group, the identical and quantity of the quantity of positive touch-control electrode and negative touch-control electrode is greater than one, and described positive touch-control electrode and described negative touch-control electrode are in opposite directions and alternately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110206989 CN102253778B (en) | 2011-07-22 | 2011-07-22 | Method for positioning capacitance sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110206989 CN102253778B (en) | 2011-07-22 | 2011-07-22 | Method for positioning capacitance sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102253778A CN102253778A (en) | 2011-11-23 |
| CN102253778B true CN102253778B (en) | 2013-06-19 |
Family
ID=44981071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110206989 Active CN102253778B (en) | 2011-07-22 | 2011-07-22 | Method for positioning capacitance sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102253778B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107346196B (en) * | 2017-06-08 | 2020-04-07 | 深圳信炜科技有限公司 | Capacitive sensing device and electronic equipment |
| EP3557397A1 (en) * | 2018-04-20 | 2019-10-23 | Interactive Scape GmbH | Control and processing unit for a touch-sensitive screen, system including the same and method of use |
| 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 |
| CN113867562B (en) * | 2021-08-18 | 2022-11-15 | 荣耀终端有限公司 | Touch screen point reporting correction method and device and electronic equipment |
Citations (1)
| 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 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2948066B1 (en) * | 2009-07-17 | 2012-01-20 | Skf Ab | SUSPENSION STOP DEVICE AND FORCE LEG. |
| SI3338765T1 (en) * | 2009-12-01 | 2019-05-31 | Translate Bio, Inc. | Steroid derivative for the delivery of mrna in human genetic diseases |
-
2011
- 2011-07-22 CN CN 201110206989 patent/CN102253778B/en active Active
Patent Citations (1)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102253778A (en) | 2011-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9069399B2 (en) | Gain correction for fast panel scanning | |
| CN103995626B (en) | A kind of touch independent positioning method and device for touch-screen | |
| CN103365506B (en) | Sensing method and device for improving noise interference of capacitive touch device | |
| US8674958B1 (en) | Method and apparatus for accurate coordinate calculation of objects in touch applications | |
| US10268324B2 (en) | Peak detection schemes for touch position detection | |
| CN103677393A (en) | Touch sensing method, processor and system | |
| CN102043524A (en) | Method and device for position detection | |
| US8803840B2 (en) | Touch panel and coordinate detection method in touch panel | |
| CN104423758A (en) | Interleaving sense elements of a capacitive-sense array | |
| CN102043508A (en) | Method and device for signal detection | |
| US11106312B2 (en) | Touch apparatus | |
| CN101840295A (en) | Multipoint touch detection method of capacitance touch screen | |
| US20120249487A1 (en) | Method of identifying a multi-touch shifting gesture and device using the same | |
| EP2691841A1 (en) | Method of identifying multi-touch scaling gesture and device using the same | |
| CN102253778B (en) | Method for positioning capacitance sensor | |
| US9612704B2 (en) | Apparatus and method for sensing touch | |
| CN103164087A (en) | Detection method of touch position of capacitive touch screen | |
| CN102253750A (en) | Scanning configuration of two-dimensional capacitance sensor and positioning method | |
| US9256313B2 (en) | Touch point detecting device and the touch point detecting method thereof | |
| US20160188104A1 (en) | Position detecting device | |
| KR102092664B1 (en) | Circuit and method for selecting coordinates in differential touch sensing system | |
| CN102253780A (en) | Method for positioning two-dimensional capacitance sensor | |
| CN101825970A (en) | Tracking method and tracking system of touch-control points | |
| US20150277624A1 (en) | Sensing Method and Related Touch Panel | |
| KR101503622B1 (en) | Method for detecting object and device using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |