CN102253779A - Scanning configuration of capacitive sensor - Google Patents
Scanning configuration of capacitive sensor Download PDFInfo
- Publication number
- CN102253779A CN102253779A CN2011102069900A CN201110206990A CN102253779A CN 102253779 A CN102253779 A CN 102253779A CN 2011102069900 A CN2011102069900 A CN 2011102069900A CN 201110206990 A CN201110206990 A CN 201110206990A CN 102253779 A CN102253779 A CN 102253779A
- Authority
- CN
- China
- Prior art keywords
- electrode
- scanning
- group
- touch
- control electrode
- 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.)
- Granted
Links
Images
Landscapes
- Position Input By Displaying (AREA)
Abstract
The invention relates to a scanning configuration of a capacitive sensor. In the scanning configuration, monolayer electrode groups are distributed at one side, and each electrode group comprises two touch control electrodes, namely a positive touch control electrode and a negative touch control electrode, wherein the electrode groups are connected to corresponding pins of a chip through lead wires to lead out driving circuits from the chip. The scanning configuration of the capacitive sensor, disclosed by the invention, is not only simple, but also can be used for effectively restraining interferences caused by outside noises so as to enhance the anti-interference performance and the driving capability of the whole sensor.
Description
Technical field
The present invention relates to a kind of scanning configuration of sensor, refer in particular to the scanning configuration of the capacitive transducer that can improve driving force.
Background technology
So-called capacitive transducer is meant that generally the principle of utilizing electric capacity transmits a kind of device or the device of 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.Existing capacitive transducer is laid with the single-layer electrodes group of a side usually, and described each electrode group includes two touch-control electrodes, is respectively positive touch-control electrode and negative touch-control electrode, and described each touch-control electrode is connected via wires on the respective pins of chip.During scanning, above-mentioned capacitive transducer is adopted line by line or pursues the scan mode of row, scan two rows or two columns simultaneously, wherein hold and reference edge as scanning respectively with two rows or two columns, in above-mentioned capacitive transducer, also be provided with a drive electrode in the described chip, this drive electrode is directly drawn and is connected on this sensor from chip, please refer to shown in Figure 1, wherein CLS scans the electric capacity between end and the drive electrode, CLR represents the electric capacity between reference edge and the drive electrode, and CGS representative scanning end is to the electric capacity of the earth, and CGR represents the electric capacity of reference edge to the earth; Because this moment, drive electrode was positioned at chip internal,, thereby influence the driving force of whole sensor so the electric capacity that electric capacity that drive electrode and scan electrode produce and reference electrode and scan electrode produce is less.
Though above-mentioned scan mode is fairly simple, but because extraneous existence is disturbed also variant in the different time periods, so the data of detecting are just not really stable, whether the operation that finally causes touching is not taken as touch, is not taken as touch and touch, can accurately not judge to be touched, when external interference is more serious, even detect the drift of the relative touch point of coordinate, and above-mentionedly will directly cause interference free performance poor, produce the action of erroneous judgement.
Therefore need solve above problem for users provide a kind of scanning configuration of easier capacitive transducer.
Summary of the invention
The actual technical matters to be solved of the present invention is the scanning configuration that how a kind of interference free performance height is provided, improves the capacitive transducer of driving force.
In order to realize above-mentioned purpose of the present invention, the invention provides a kind of scanning configuration of capacitive transducer, it has the single-layer electrodes group that is laid in a side, described each electrode group includes two touch-control electrodes, positive touch-control electrode and negative touch-control electrode, described electrode group is connected via wires on the respective pins of chip, draws driving circuit from described chip.
The scanning configuration of capacitive transducer of the present invention, not only simple, and can effectively restrain the interference that outside noise causes, and strengthen anti-interference, improve the driving force of whole sensor.
Description of drawings
Fig. 1 is existing sensor chip internal circuit diagram.
Fig. 2 is the structure Butut according to single-layer electrodes of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
The scanning configuration of capacitive transducer involved in the present invention, it has the single-layer electrodes group that is laid in a side is single-layer electrodes, please refer to the wire structures of electrode layer shown in Figure 21, described electrode layer 1 is made up of a plurality of electrode groups 10, described each electrode group 10 all has two touch-control electrodes, be respectively positive touch-control electrode 11 and negative touch-control electrode 12, above-mentioned electrode group 10 is connected respectively on the respective pins of touch-control chip 13 through lead.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 adopts in the above-mentioned electrode layer 1 during line by line or by column scan, scans two rows or two columns simultaneously at every turn, obtains the electric capacity difference of two rows or two columns then.If described electrode layer 1 total N electrode group 10 when scanning for the first time, scans described positive touch-control electrode 11 one by one, i.e. positive touch-control electrode 11 in first group of electrode 10 of elder generation's scanning is till the positive touch-control electrode 11 that scans last group electrode 10.Specifically: at first the positive touch-control electrode 11 in first group of electrode 10 is held as scanning S, and the positive touch-control electrode 11 of tactic second group of electrode 10 is as holding with reference to R, negative touch-control electrode 12 and all unsettled or equal ground connection of other group electrode 10 in negative touch-control electrode 12 in this moment first group of electrode 10 and the second group of electrode 10, according to above-mentioned scanning configuration, finishing for the first time, scanning obtains first group of data.In like manner, when scanning for the second time, positive touch-control electrode 11 in second group of electrode 10 is held as S, and the positive touch-control electrode 11 of tactic the 3rd group of electrode 10 is as holding with reference to R, negative touch-control electrode 12 and all unsettled or equal ground connection of other group electrode 10 in negative touch-control electrode 12 in this moment second group of electrode 10 and the 3rd group of electrode 10, according to above-mentioned scanning configuration, finishing for the second time, scanning obtains second group of data; Order is analogized successively, till obtaining (N-1) group data.Above-mentioned electrode layer 1 has been finished the scanning of positive touch-control electrode 11 in the electrode group 10 earlier when scanning, begin the scanning of negative touch-control electrode 12 below.
During to 12 scannings of the negative touch-control electrode in the above-mentioned electrode group 10, also be to scan described negative touch-control electrode 12 one by one, promptly begin till the negative touch-control electrode 12 that scans last group electrode 10 from the negative touch-control electrode 12 that scans first group of electrode 10.Specifically: when scanning at first for the first time, negative touch-control electrode 12 in first group of electrode 10 is held as scanning S, and the negative touch-control electrode 12 of tactic second group of electrode 10 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 positive touch-control electrode 11 in this moment first group of touch-control electrode 10 and the second group of electrode 10, according to above-mentioned scanning configuration, finishing for the first time, scanning obtains first group of data.In like manner, when scanning for the second time, negative touch-control electrode 12 in second group of electrode 10 is held as scanning S, and the negative touch-control electrode 12 of tactic the 3rd group of electrode 10 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 positive touch-control electrode 11 in this moment second group of electrode 10 and the 3rd group of electrode 10, according to above-mentioned scanning configuration, finishing for the second time, scanning obtains second group of data; Order is analogized successively, till obtaining (N-1) group data.
Finishing above-mentioned scanning configuration mode just needs to introduce driving circuit, and driving circuit of the present invention is to draw three electrodes respectively by three pins of described chip 13, and scan electrode S, reference electrode R and drive electrode L form.Wherein, scan electrode S respectively is connected a capacitor C with reference electrode R, and drive electrode L goes up input signal, the charging of the respective electrode in the time of can supplying scanning on the electrode layer 1.By the introducing of foregoing circuit structure, we can be by changing electric capacity between scanning end S and the drive electrode L and the electric capacity between reference edge R and the drive electrode L, thereby improved the electric capacity of entire circuit, finally promoted the driving force of entire electrode layer 1.
The method of scanning configuration of the present invention is not limited to the foregoing description, as also can be with above-mentioned first group and second group of electrode 10 all as scanning S end, at this moment, tactic the 3rd group and the 4th group of electrode 10 are all as holding with reference to R, the all unsettled or equal ground connection of other electrode group, the principle of using above-mentioned driving circuit equally can improve driving force.The present invention obtains the electric capacity difference of two rows or two columns because employing scans two rows or two columns simultaneously, thus even under the situation that extraneous existence is disturbed, also can reduce to the full extent to disturb, so the antijamming capability enhancing; And in whole scan setting, above-mentioned introducing with reference to the R end not only is provided with more convenient, and change flexibly, disturbs under the consistent situation with the S end at R, even can get rid of interference; Moreover, scanning collocation method of the present invention, not only simple, and cause the driving force of entire circuit to increase substantially by the electric capacity that improves sensor.
Claims (10)
1. the scanning of capacitive transducer configuration, it has the single-layer electrodes group that is laid in a side, described each electrode group includes two touch-control electrodes, positive touch-control electrode and negative touch-control electrode, described electrode group is connected via wires on the respective pins of chip, it is characterized in that: draw driving circuit from described chip.
2. scanning configuration as claimed in claim 1, it is characterized in that: scan electrode, reference electrode and drive electrode that described driving circuit is drawn respectively by three pins of described chip are formed.
3. scanning configuration as claimed in claim 2, it is characterized in that: described scan electrode respectively is connected an electric capacity with reference electrode.
4. scanning configuration as claimed in claim 2, it is characterized in that: described drive electrode L goes up input signal.
5. scanning configuration as claimed in claim 1 is characterized in that: when described electrode group scans, scan described positive touch-control electrode at first one by one, and then beginning scans negative touch-control electrode successively.
6. the scanning of capacitive transducer as claimed in claim 5 configuration is characterized in that: during described scanning, the row of first row or row are as the scanning end, and second row that is adjacent or row are as with reference to holding.
7. the scanning of capacitive transducer as claimed in claim 5 configuration 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.
8. dispose as the scanning of claim 6 or 7 described capacitive transducers, it is characterized in that: the described first time is when scanning, positive touch-control electrode in first group of electrode is held as scanning, and the positive touch-control electrode of tactic second group of electrode is as with reference to end, negative touch-control electrode and all unsettled or equal ground connection of other group electrode in this moment first group of electrode and the second group of electrode.
9. the scanning of capacitive transducer as claimed in claim 8 configuration, it is characterized in that: the described second time is when scanning, positive touch-control electrode in second group of electrode is held as scanning, and the positive touch-control electrode of tactic the 3rd group of electrode is as the reference end, negative touch-control electrode and all unsettled or equal ground connection of other group electrode in this moment second group of electrode and the 3rd group of electrode, sequential scanning successively.
10. the scanning of capacitive transducer as claimed in claim 1 configuration is characterized in that: described electrode scans two rows or two columns during line by line or by column scan at every turn simultaneously, obtains the electric capacity difference of two rows or two columns then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110206990 CN102253779B (en) | 2011-07-22 | 2011-07-22 | Scanning configuration of capacitive sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110206990 CN102253779B (en) | 2011-07-22 | 2011-07-22 | Scanning configuration of capacitive sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102253779A true CN102253779A (en) | 2011-11-23 |
| CN102253779B CN102253779B (en) | 2013-04-17 |
Family
ID=44981072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110206990 Active CN102253779B (en) | 2011-07-22 | 2011-07-22 | Scanning configuration of capacitive sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102253779B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594363A (en) * | 2012-02-29 | 2012-07-18 | 苏州瀚瑞微电子有限公司 | Scanning method of capacitance touch button and press determination method |
| CN102750060A (en) * | 2012-06-04 | 2012-10-24 | 天津昌立微电子技术有限公司 | Projection-type capacitive touch screen system time domain noise reduction method by space differentiation |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101666832A (en) * | 2008-09-03 | 2010-03-10 | 罗姆股份有限公司 | Static electricity capacitive sensor, control method, detection circuit and input device thereof |
| CN101702109A (en) * | 2009-10-26 | 2010-05-05 | 旭曜科技股份有限公司 | Sensing circuit of capacitive touch panel |
| CN101726669A (en) * | 2008-08-08 | 2010-06-09 | 索尼株式会社 | Capacitance change measuring circuit of capacitive sensor device, capacitive sensor module, method of measuring capacitance change of capacitive sensor device, and electronic device |
| CN201540548U (en) * | 2008-04-25 | 2010-08-04 | 苹果公司 | Touch sensor panel and manufacturing system thereof as well as corresponding handheld electronic equipment |
| CN101901073A (en) * | 2009-05-26 | 2010-12-01 | 索尼公司 | Touch sensor, display device and electronic installation |
-
2011
- 2011-07-22 CN CN 201110206990 patent/CN102253779B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201540548U (en) * | 2008-04-25 | 2010-08-04 | 苹果公司 | Touch sensor panel and manufacturing system thereof as well as corresponding handheld electronic equipment |
| CN101726669A (en) * | 2008-08-08 | 2010-06-09 | 索尼株式会社 | Capacitance change measuring circuit of capacitive sensor device, capacitive sensor module, method of measuring capacitance change of capacitive sensor device, and electronic device |
| CN101666832A (en) * | 2008-09-03 | 2010-03-10 | 罗姆股份有限公司 | Static electricity capacitive sensor, control method, detection circuit and input device thereof |
| CN101901073A (en) * | 2009-05-26 | 2010-12-01 | 索尼公司 | Touch sensor, display device and electronic installation |
| CN101702109A (en) * | 2009-10-26 | 2010-05-05 | 旭曜科技股份有限公司 | Sensing circuit of capacitive touch panel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102594363A (en) * | 2012-02-29 | 2012-07-18 | 苏州瀚瑞微电子有限公司 | Scanning method of capacitance touch button and press determination method |
| CN102750060A (en) * | 2012-06-04 | 2012-10-24 | 天津昌立微电子技术有限公司 | Projection-type capacitive touch screen system time domain noise reduction method by space differentiation |
| CN102750060B (en) * | 2012-06-04 | 2015-06-10 | 天津昌立微电子技术有限公司 | Projection-type capacitive touch screen system time domain noise reduction method by space differentiation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102253779B (en) | 2013-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20180275782A1 (en) | Capacitive touch sensor and capacitive pen | |
| US9501167B2 (en) | Scanned piezoelectric touch sensor device | |
| CN102135829B (en) | Method of driving a touch screen system | |
| US9577614B2 (en) | Detecting method and device for suppressing interference of low-frequency noise | |
| US9151790B1 (en) | Sensor pattern with inactive electrodes in transmit (TX) layer for mutual capacitance | |
| US20140362030A1 (en) | Capacitive touch screen and method for manufacturing the same | |
| TWI541712B (en) | Touch screen, touch panel, and driving method thereof | |
| WO2016082373A1 (en) | In cell touch screen and touch control detection method thereof, and display device | |
| CN203250300U (en) | Touch panel, touch-sensitive equipment and electronic equipment | |
| CN102033637A (en) | Touch screen position detection method | |
| CN102799322B (en) | Capacitance sensing apparatus and control method | |
| CN102253779B (en) | Scanning configuration of capacitive sensor | |
| CN102253778B (en) | Method for positioning capacitance sensor | |
| CN102253750A (en) | Scanning configuration of two-dimensional capacitance sensor and positioning method | |
| CN102915169B (en) | A kind of scan method of touch-screen | |
| US20140085211A1 (en) | Field shaping touch sensor | |
| US20130207907A1 (en) | Touch device and touch sensing method thereof | |
| CN103713793A (en) | Locating method for self-capacitance type touch screen | |
| CN102749774B (en) | Array substrate, display equipment, electronic equipment, scanning method and scanning device | |
| CN203812221U (en) | Capacitive touchpad | |
| CN203324956U (en) | Capacitive touch screen | |
| CN104102381A (en) | Novel combined touch unit, realization method and mobile terminal | |
| CN103092451A (en) | Touch screen scanning method | |
| CN102279679B (en) | Scanning configuration and positioning method of two-dimensional capacitive sensor | |
| CN102236491A (en) | Scan configuration method and positioning method for capacitive sensor |
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 |