CN202189339U - Touch-point detector - Google Patents
Touch-point detector Download PDFInfo
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- CN202189339U CN202189339U CN2011201833866U CN201120183386U CN202189339U CN 202189339 U CN202189339 U CN 202189339U CN 2011201833866 U CN2011201833866 U CN 2011201833866U CN 201120183386 U CN201120183386 U CN 201120183386U CN 202189339 U CN202189339 U CN 202189339U
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Abstract
The utility model provides a touch-point detector, comprising an electrode, a processor connected with the electrode and a scanning unit which is connected with the electrode and used for scanning the electrode by an excitation signal with at least two frequencies. Under the condition that the detection accuracy of the touch-point detector is not reduced, an electrode edge region of the conventional touch-point detector can be reduced, and an integrated circuit block of the processor can be reduced, so that the touch-point detector can be preferably integrated with mini equipment; and the consumption of production raw material and the other product cost can be reduced.
Description
Technical field
The present invention relates to the touch point detection techniques, particularly relate to a kind of touch point arrangement for detecting.
Background technology
At present, through the touch of finger and so on touch-control object, during the technology of directly electronic equipment being operated has been widely used in routine work and has lived.These electronic equipments generally adopt the touch point arrangement for detecting to come the touch sensitive action and produce corresponding electric signal for subsequent operation.Said touch point arrangement for detecting often shows as forms such as Trackpad, touch screen in actual production or in using.
According to the difference of touch-control principle, the touch point arrangement for detecting mainly is divided into resistance-type, condenser type, optical profile type, electromagnetic type, sound wave type etc.Wherein the principle of work of capacitance touch point arrangement for detecting is: with conductive touch-control object touching device such as finger or induction pen surface, the position that causes apparatus surface to be touched produces capacitance variations by the user; Microprocessor detects the coordinate of touch point according to this capacitance variations, to reach the purpose of touch control operation.
In order to cooperate different electronic equipments, the dealer develops various capacitance touch point arrangement for detecting, and projected capacitive touch point arrangement for detecting is exactly wherein a kind of.The touch-control electrode package purse rope trellis electrode of projected capacitive touch touch point arrangement for detecting and single shaft are to electrode.To the electrode, because each electrode all has impedance, therefore when pumping signal during through electrode, pumping signal just can produce decay concerning single shaft, and the output valve that produces on the while electrode is respective change also.As shown in Figure 1, output valve on each electrode that is scanned and touch point provide apart from pumping signal between the distance of end has certain variation relation, therefore, can utilize this variation relation to determine the position of touch point on electrode through scanning.
Yet; If only the end from electrode provides pumping signal; Be monolateral outlet,, can cause position, identical touch point to produce different output valves then because the touch object is different with the touch area that electrode directly contacts; Perhaps different positions, touch point produces identical output valve, and then causes the touch point position detecting to be made mistakes.Therefore,, pumping signal is provided respectively, promptly bilateral outlet from the electrode two ends in order to reduce to touch the influence that area causes the touch point position detecting.As shown in Figure 2, the single shaft with traditional bilateral outlet comprises electrode 2 to the touch point of electrode arrangement for detecting 1, lead 3,4, processor 5.Wherein electrode 2 has ends A, B, and the A of lead 3 connection electrode 2 holds to processor 5, and the B of lead 4 connection electrode 2 holds to processor 5.As shown in Figure 3, when A being held into scanning, the output valve of signal and touch point are La apart from the variation relation curve between the distance of A end; When B being held into scanning, the output valve of signal and touch point are Lb apart from the variation relation curve between the distance of A end.Therefore, utilize the relation between two change curve La, the Lb, can obtain two output valve Dt1, Dt2, can calculate T position, touch point according to these two output valve Dt1, Dt2 to same touch point position T.
In view of bilateral outlet structure; Every strip electrode all needs two leads; Therefore the periphery at electrode just needs bigger fringe region to lay the lead of connection electrode, simultaneously, and when the touch point arrangement for detecting with this kind electrode combines mini-plant; For example portable electric appts just can be restricted.In addition, as far as processor, lead is many more, and more input/output end ports (I/O pin) just need be provided, so processor needs a bigger integrated circuit block (Integrated Circuit Package).
Summary of the invention
In view of this, be necessary to provide a kind of touch point arrangement for detecting, under the situation of the precision that does not reduce the touch point detecting, can reduce the fringe region of electrode, reduce the integrated circuit block of processor simultaneously.
A kind of touch point arrangement for detecting, the processor that comprises electrode and be connected in said electrode is characterized in that, said touch point arrangement for detecting also comprises the scanning element that is connected in said electrode and scans said electrode at least with the pumping signal of two frequencies.
Adopt above-mentioned touch point arrangement for detecting; When having higher touch point detecting precision; The fringe region of less electrode and less integrated circuit block can be provided,, reduce the consumption of raw materials for production and other production costs to realize preferably and the integration of mini-plant.
Description of drawings
Below in conjunction with embodiment and accompanying drawing, the present invention is done further explain.
Fig. 1 is the synoptic diagram of the variation relation curve between the distance that end is provided by the output valve on the electrode that scans and touch point apart from pumping signal.
Fig. 2 is the structural representation with touch point arrangement for detecting of traditional bilateral outlet.
Fig. 3 be on the electrode of arrangement for detecting shown in Figure 2 output valve and touch point apart from the synoptic diagram of the variation relation curve between the distance of A end.
Fig. 4 is the planar structure synoptic diagram of first embodiment of touch point provided by the invention arrangement for detecting.
Fig. 5 is the planar structure synoptic diagram of second embodiment of touch point provided by the invention arrangement for detecting.
Fig. 6 is the planar structure synoptic diagram of the 3rd embodiment of touch point provided by the invention arrangement for detecting.
Fig. 7 is the planar structure synoptic diagram of the 4th embodiment of touch point provided by the invention arrangement for detecting.
Fig. 8 is for when the pumping signal with two different frequencies scans same electrode, and output valve and touch point are apart from the synoptic diagram of the variation relation curve between the distance of A end.
Fig. 9 is the process flow diagram of first embodiment of touch point provided by the invention method for detecting.
Figure 10 is the process flow diagram of second embodiment of touch point provided by the invention method for detecting.
Embodiment
As shown in Figure 4, the touch point arrangement for detecting 100 of first embodiment of the invention comprises a plurality of electrode 110, lead 120 and processors 130 with the first end A and second end B.Wherein, these a plurality of electrodes 110 distribute along same direction, and promptly first direction X then is parallel to each other between the electrode 110, arranges along second direction Y.The first end A of lead 120 connection electrode 110 is to processor 130.Arrangement for detecting 100 also comprises the scanning element 140 of the first end A that is connected to electrode 110, is used for providing the pumping signal of at least two frequencies to electrode 110, so that electrode 110 is scanned.According to the different circuits design demand; Scanning element 140 can be arranged at processor 130 inside; Form a global facility; Also can be designed to an independent component of opening in 130 minutes with processor separately, promptly scanning element 140 is arranged at processor 130 outsides, connects (figure does not show) with lead or other electric connection modes between the two.
The shape of electrode 110 is not limited to strip shown in Figure 4, can also be other irregular geometric configuratioies such as polygon.The electrode 210 of the arrangement for detecting 200 of second embodiment of the invention for example shown in Figure 5 is trapezoidal.
As shown in Figure 6, the touch point arrangement for detecting 300 of the 3rd embodiment of the present invention, similar with the arrangement for detecting 100 of first embodiment, comprise a plurality of electrode 310, lead 320, processor 330 and scanning elements 340 with the first end A and second end B.Difference is that each electrode 310 comprises a plurality of conductive units 311 and a plurality of leads 312, is separated from each other between the conductive unit 311, is connected by lead 312.The position of other elements is provided with first embodiment in the arrangement for detecting 300 of the 3rd embodiment.
As shown in Figure 7, the touch point arrangement for detecting 400 of the 4th embodiment of the present invention.Be that with the difference of the arrangement for detecting 100 of first embodiment electrode 410 is divided into first electrode 410a that distributes along first direction X and the second electrode 410b that distributes along second direction Y.Wherein, the first lead 420a connects the first electrode 410a and connects the second electrode 410b to processor 430 to processor 430, the second lead 420b.
Electrode in the arrangement for detecting of touch point provided by the invention, different according to actual needs, can process by transparent material, for example tin indium oxide (ITO) etc. also can be processed by opaque material, for example metal etc.For example, when electrode when being opaque, can be applicable to the touch control operation panel of equipment such as notebook computer; When electrode when being transparent, the touch control operation screen is made on the surface that can be applicable to light-emitting display apparatus such as display.
Electrode number is at least two in the arrangement for detecting of touch point provided by the invention, and wherein electrode number is decided by the resolution and the size of applied arrangement for detecting.The General Analytical degree requires high more, and promptly pixel request is more little, and electrode number is many more; Size is big more, and electrode number is also many more.In addition, it is vertical that the first direction X that electrode extends and the direction Y of electrode spread not necessarily want, as long as intersect.
Arrangement for detecting with first embodiment of the present invention is an example; As shown in Figure 4; Before touch point arrangement for detecting 100 is detected, to calibrate it earlier, to the first end A of electrode 110 and the second end B when the pumping signal scanning of different frequency; The output valve that produces defines and record, as the benchmark of detecting position, touch point.To touch object earlier and contact with the first end A of any electrode 110, promptly the touch point is at the first end A, and scanning element 140 scans this electrode 110 with the pumping signal of first frequency f1, and processor 130 is measured benchmark output valve Da1; (pumping signal of f2＜f1) scans this electrode 110, and processor 130 is measured benchmark output valve Da2 with second frequency f2 again; Processor 130 calculates the benchmark output value difference Da=Da1-Da2 of the first end A according to two benchmark output valve Da1, Da2.In like manner; Contact with the second end B of same electrode 110 through touching object; Pumping signal with first frequency f1 and second frequency f2 scans this electrode 110 respectively; Processor 130 draws benchmark output valve Db1, Db2 respectively, and then calculates the benchmark output value difference Db=Db1-Db2 of the second end B.The first end A and benchmark output valve Da1, Da2, Db1, the Db2 of the second end B when the pumping signal of frequency f 1, f2 scans according to this electrode 110 of measuring; Draw out on this electrode output valve and touch point apart from variation relation curve L1, the L2 of the distance of the first end A, as shown in Figure 8.
When the surface of arrangement for detecting provided by the invention as shown in Figure 4 produces touch point C, can detect the position of touch point C by the flow process of first embodiment of touch point method for detecting shown in Figure 9.Get into after the initial step 10; Execution in step 11, scanning element 140 is with all electrodes 110 of pumping signal scanning of first frequency f1, wherein; Scanning element 140 can scan each electrode (also can scan by other different order) successively, also can scan all electrodes simultaneously.Get into determining step 12, processor 130 judges whether to produce output valve, if judged result is then returned step 11 for not; If judged result for being, then gets into step 13, processor 130 is measured the electrode 110 that produces output valve, measures the output valve Dx1 of generation.
Get into step 14, the electrode 110 of the generation output valve of measuring in the pumping signal scanning step 13 of scanning element 140 with second frequency f2.Get into step 15, processor 130 is measured the output valve Dx2 that this electrode 110 produces.Get into step 16, processor 130 calculates the position Yc of touch point C on second direction Y through method of interpolation.
Get into calculation procedure 17, processor 130 calculates output value difference Dx=Dx1-Dx2 according to the output valve Dx2 that measures in output valve Dx1 that measures in the step 13 and the step 15; As shown in Figure 8; The output value difference Dx of benchmark output value difference Da, Db, touch point C and touch point C are apart from the proportional relation of distance of the first end A; Wherein if the position Xa at first end A place is defined as initial point, i.e. Xa=0, the second end B is Xb apart from the distance of the first end A; Benchmark output value difference Da, the Db of this electrode 110 of therefore storing in advance according to processor, through calculating formula:
Calculate touch point C distance X c apart from the first end A on this electrode 110, i.e. the position of touch point C on first direction X.Get into step 18, processor 130 position Xc, the Ycs of output touch point C on first direction X and second direction Y.
According to the design demand of different scanning mode, the touch point that the surface of arrangement for detecting provided by the invention produces can also be obtained by the flow process detecting of second embodiment of touch point method for detecting shown in Figure 10.Basic identical with first embodiment of method for detecting, difference is need not measure in the step 23 electrode 110 that produces output valve, and therefore, during execution in step 24, scanning element 140 is with all electrodes 110 of pumping signal scanning of second frequency f2.
The frequency of above-mentioned two pumping signals can be arranged in pairs or groups arbitrarily, f1=1.2MHz for example, f2=380kHz.For cooperating the requirement of different touch point detecting precisions, can adopt two pumping signals with upper frequency, respectively electrode 110 is scanned, calculate the mean value of Xc.
Above-mentioned processor comprises storage unit, receiving element, computing unit and output unit.Wherein, storage unit is used to store variation relation curve L1, the L2 of benchmark output value difference Da, Db and output valve and the distance of the touch point distance first end A of the first end A and the second end B of each electrode; Receiving element receives scanning element scans the back generation to the electrode that is touched with the pumping signal of different frequency output valve; Computing unit is carried out position, the benchmark output value difference of all electrodes and the calculating that touch point C belongs to the output value difference of electrode on first direction X and second direction Y to touch point C; Output unit then is to export position Xc, the Yc of the touch point C that calculates on first direction X and second direction Y to carry out next step operation unit.
As far as the 4th embodiment of touch point provided by the invention arrangement for detecting, the electrode that can be considered two-layer first embodiment intersects stack each other.Therefore, wherein the first electrode 410a can also pass through above-mentioned touch point method for detecting, calculates the position of touch point on the first electrode 410a, i.e. the position Xc of touch point on first direction X; Position on the second direction Y through the second electrode 410b is implemented above-mentioned touch point method for detecting, calculates the position Yc of touch point on the second electrode 410b.
In the method for detecting of above-mentioned touch point; Owing to can calculate respectively to the touch point that produces on each electrode; Therefore the touch point that occurs two or more when arrangement for detecting provided by the invention surface simultaneously; And two touch points use above-mentioned method for detecting can also detect each and go out touch point position not on same electrode the time.
The above is merely preferred embodiment of the present invention, so can not limit scope of the present invention with this, the equivalence of promptly doing according to claim of the present invention and description changes and modifies, and all should still belong in the scope that patent of the present invention contains.
Claims (10)
1. touch point arrangement for detecting, the processor that comprises electrode and be connected in said electrode is characterized in that, said touch point arrangement for detecting also comprises the scanning element that is connected in said electrode and scans said electrode at least with the pumping signal of two frequencies.
2. touch point according to claim 1 arrangement for detecting is characterized in that, said electrode comprises the electrode that the same direction in a plurality of edges distributes.
3. touch point according to claim 1 arrangement for detecting is characterized in that, said electrode comprises along first electrode of first direction distribution and second electrode that distributes along second direction.
4. touch point according to claim 3 arrangement for detecting is characterized in that, said first direction and said second direction are intersected each other.
5. touch point according to claim 1 arrangement for detecting is characterized in that, said electrode is a polygon.
6. touch point according to claim 1 arrangement for detecting is characterized in that, each said electrode comprises a plurality of conductive units that are separated from each other and a plurality of leads that are connected said conductive unit.
7. touch point according to claim 1 arrangement for detecting is characterized in that, it is inner that said scanning element is arranged at said processor.
8. touch point according to claim 1 arrangement for detecting is characterized in that, it is outside that said scanning element is arranged at said processor.
9. touch point according to claim 1 arrangement for detecting is characterized in that, said electrode is a transparent conductive material.
10. touch point according to claim 1 arrangement for detecting is characterized in that, said electrode is a metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201833866U CN202189339U (en) | 2011-05-28 | 2011-05-28 | Touch-point detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201833866U CN202189339U (en) | 2011-05-28 | 2011-05-28 | Touch-point detector |
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| Publication Number | Publication Date |
|---|---|
| CN202189339U true CN202189339U (en) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201833866U Expired - Lifetime CN202189339U (en) | 2011-05-28 | 2011-05-28 | Touch-point detector |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102799300A (en) * | 2011-05-28 | 2012-11-28 | 宸鸿科技(厦门)有限公司 | Touch point detecting device and detecting method |
| CN106557211A (en) * | 2015-09-30 | 2017-04-05 | 宸鸿科技(厦门)有限公司 | A kind of three-dimensional touch assembly |
| CN106951121A (en) * | 2017-03-20 | 2017-07-14 | 苏州诺菲纳米科技有限公司 | Contactor control device |
-
2011
- 2011-05-28 CN CN2011201833866U patent/CN202189339U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102799300A (en) * | 2011-05-28 | 2012-11-28 | 宸鸿科技(厦门)有限公司 | Touch point detecting device and detecting method |
| CN102799300B (en) * | 2011-05-28 | 2016-07-06 | 宸鸿科技(厦门)有限公司 | Touch point detector and method for detecting thereof |
| CN106557211A (en) * | 2015-09-30 | 2017-04-05 | 宸鸿科技(厦门)有限公司 | A kind of three-dimensional touch assembly |
| CN106557211B (en) * | 2015-09-30 | 2024-01-23 | 宸鸿科技(厦门)有限公司 | Three-dimensional touch assembly |
| CN106951121A (en) * | 2017-03-20 | 2017-07-14 | 苏州诺菲纳米科技有限公司 | Contactor control device |
| CN112181206A (en) * | 2017-03-20 | 2021-01-05 | 苏州诺菲纳米科技有限公司 | Touch control device |
| CN112181206B (en) * | 2017-03-20 | 2023-09-22 | 苏州诺菲纳米科技有限公司 | Touch control device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120411 |
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| CX01 | Expiry of patent term |