CN102385450A - Detection method and detection circuit of touch event - Google Patents
Detection method and detection circuit of touch event Download PDFInfo
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- CN102385450A CN102385450A CN2010102779426A CN201010277942A CN102385450A CN 102385450 A CN102385450 A CN 102385450A CN 2010102779426 A CN2010102779426 A CN 2010102779426A CN 201010277942 A CN201010277942 A CN 201010277942A CN 102385450 A CN102385450 A CN 102385450A
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Abstract
The invention relates to a detection method of a touch event, which is used for detecting the touch event on a touch control panel. The touch control panel comprises a plurality of first induction shafts and a plurality of second induction shafts respectively in a first dimension and a second dimension. The detection method comprises the following steps: selecting the first induction shaft not adjacent to the first induction shaft to be used as a first reference shaft in allusion to each first induction shaft, and applying the first induction shaft and the first reference shaft to obtain first sensing data corresponding to the first induction shaft; applying the second induction shafts to obtain second sending data corresponding to each second induction shaft; and obtaining a touch event detection result according to a plurality of first sending data corresponding to all the first induction shafts and a plurality of second sensing data corresponding to all the second induction shafts.
Description
Technical field
The present invention relates to touch technology, especially relate to a kind of detection method and relevant apparatus thereof in order to the touch points on the decision contact panel.
Background technology
Change in the middle of the electronic goods in modern times; Capacitance type touch-control panel is because characteristic simple to operation and often be used as the communication interface of user and machine, and wherein projecting type capacitor (projective capacitive) is widely used on the portable apparatus such as mobile phone, Vehicular navigation device because of having characteristics such as support multi-point touch (multi touch), higher transmittance and power saving.Yet; Projecting type capacitor is when the measurement that is used for contact panel; Usually in X direction or y direction only has several to arrive dozens of sensing electrode (sensingelectrode); And these sensing electrodes of this contact panel can come to produce respectively a plurality of sensing signals according to the touch event on it, and according to the residual quantity between the adjacent in twos sensing signal that sensing electrode produced, come to produce respectively a plurality of sensing outputs.In the prior art, interior slotting mode is normally used in the calculating of touch points, is estimated peak value via what the output of the sensing that calculates determined, or estimates the distance of measurement point and extreme value with the ratio of the sensing output valve that calculates and extreme value.Please with reference to Fig. 1, it is an illustrative diagram of on known contact panel 100, surveying a touch event TEa.As shown in the figure, known contact panel 100 respectively has six inductive axis X1～X6 and Y1～Y6 on X axle and Y axle, and inductive axis X1～X6, Y1～Y6 have corresponding sensing output valve SX1a～SX6a, SY1a～SY6a respectively.For instance; As far as inductive axis X1～X6; It is effective numerical value (being the numerical value of non-zero) that sensing output valve SX3a～SX5a is wherein only arranged; Calculate behind sensing signal that sensing output valve SX3a is detected via a detection circuit comparison inductive axis X3 and the sensing signal that inductive axis X2 detected and obtain, likewise, calculating behind the sensing signal that sensing output valve SX4a and sensing output valve SX5a are detected via this detection circuit comparison inductive axis X4, X5 and X5, X6 and the numerical value that obtains respectively.Calculate these effective numerical value via interior slotting mode, just can calculate the position of touch points position between inductive axis X3 and X4 of touch event TEa.In like manner, (be SY3a～SY5a), can draw the position of the touch points position of touch event TEa through effective numerical value of calculating corresponding inductive axis Y1～Y6 at inductive axis Y4.
Please refer again to Fig. 2, it is an illustrative diagram of surveying another touch event TEb on the known contact panel 100.Than touch event TEa, the touch points of touch event TEb is less, and its scope also can't contain the wherein area of exploring electrode, and effectively therefore numerical value also reduce.In the example of Fig. 2, it is effective numerical value that sensing output valve SX3b～SX4b and SY4b are only arranged, therefore follow-up when doing to calculate, and can't utilize interpolation method to come accurately to obtain the position of touch points.Moreover; When touch event TEb was a dynamic touch points, for example the user used a touching pen (a touch pen) and streaks contact surface plate 100, owing to lack enough effective numerical value; The touch points track that it detected can present characteristic of nonlinear, therefore causes relatively poor system effectiveness.
So, how to increase the valid data that detected on the contact panel 100, and then the linearity that increases detection data is still this field a big problem to be solved is arranged.
Summary of the invention
In view of this, the invention provides a kind of detection method and detection circuit that increases effective detection data, and then improve the linearity of detection data.
According to an embodiment of the present invention; It provides a kind of detection method of touch event; In order on contact panel, to survey touch event; Wherein this contact panel includes a plurality of first inductive axis and a plurality of second inductive axis respectively on first dimension and second dimension; This detection method includes: select first not adjacent with this first inductive axis inductive axis with as first axis of reference to each first inductive axis, use this first inductive axis and this first axis of reference and obtain first sense data that should first inductive axis; Use second sense data that these second inductive axis obtain corresponding each second inductive axis; And obtain the touch event result of detection according to pairing complex first sense data of all these first inductive axis and pairing complex second sense data of all these second inductive axis.
According to the described detection method of this embodiment, only be separated with one first inductive axis mutually between wherein said first axis of reference and said first inductive axis.
According to the described detection method of this embodiment; Wherein using the step that said second inductive axis obtains said second sense data of corresponding each second inductive axis comprises: to each second inductive axis: select second not adjacent with said second inductive axis inductive axis to be used as second axis of reference, use said second sense data that said second inductive axis and said second axis of reference obtain corresponding said second inductive axis.
Preferably, in this detection method, only be separated with one first inductive axis mutually between said first axis of reference and said first inductive axis, and only be separated with one second inductive axis mutually between said second axis of reference and said second inductive axis.
According to another embodiment of the present invention; It provides a kind of detection circuit of touch event; In order on contact panel, to survey touch event; Wherein this contact panel includes a plurality of first inductive axis and a plurality of second inductive axis respectively on first dimension and second dimension, and this detection circuit includes scanning element and decision element.To each first inductive axis, this scanning element selects first not adjacent with this first inductive axis inductive axis to be used as first axis of reference, and uses this first inductive axis and this first axis of reference and obtain first sense data that should first inductive axis; And this scanning element also obtains second sense data of corresponding each second inductive axis according to these second inductive axis.This decision element is coupled to this scanning element, in order to obtain the touch event result of detection according to pairing complex first sense data of all these first inductive axis and pairing complex second sense data of all these second inductive axis.
According to the described detection circuit of this embodiment, only be separated with one first inductive axis mutually between wherein said first axis of reference and said first inductive axis.
According to the described detection circuit of this embodiment; Wherein to each second inductive axis; Said scanning element selects second not adjacent with said second inductive axis inductive axis to be used as second axis of reference, and uses said second sense data that said second inductive axis and said second axis of reference obtain corresponding said second inductive axis.
Preferably, in this detection circuit, only be separated with one first inductive axis mutually between said first axis of reference and said first inductive axis, and only be separated with one second inductive axis mutually between said second axis of reference and said second inductive axis.
Description of drawings
Fig. 1 is an illustrative diagram of on known contact panel, surveying a touch event.
Fig. 2 is an illustrative diagram of on known contact panel, surveying another touch event.
The synoptic diagram of the detection circuit that Fig. 3 is realized for an embodiment according to the present invention.
Fig. 4 is an embodiment according to the present invention is surveyed touch event on a contact panel a illustrative diagram.
Embodiment
Please be simultaneously with reference to Fig. 3 and Fig. 4; The synoptic diagram of the detection circuit 300 that Fig. 3 is realized for an embodiment according to the present invention; And Fig. 4 is an embodiment according to the present invention is surveyed a touch event TEc on a contact panel 100 a illustrative diagram, and wherein touch event TEc among Fig. 4 and the touch event TEb shown in Fig. 2 have onesize touch points area.Detection circuit 300 include (but being not limited to) one scan element 310 and one the decision element 320, and contact panel 100 respectively first dimension (for example: the X axle) with second dimension (for example: include six first inductive axis X1～X6 and six second inductive axis Y1～Y6 the Y axle).Note that the only property explanation as an example of quantity of first, second inductive axis, but not restriction of the present invention.In this embodiment; Scanning element 310 is when the sensing output of obtaining a specific inductive axis; Can select not adjacent inductive axis be used as an axis of reference, and use this inductive axis and this axis of reference and obtain a sense data that should specific inductive axis (promptly obtain to should specific inductive axis this sensing output) with this specific inductive axis.
For instance; When scanning element 310 in sensing when output of obtaining the first inductive axis X3; Scanning element 310 can be chosen the first inductive axis X1 that only is separated with the first inductive axis X2 mutually and be used as first axis of reference; And the sensing signal of using the corresponding first inductive axis X3 (being aforesaid specific inductive axis) to compare and calculating with the corresponding first inductive axis X1 (being aforesaid axis of reference), exports SX3c with the sensing that obtains the corresponding first inductive axis X3; In like manner; When scanning element 310 in sensing when output of obtaining the second inductive axis Y3; Scanning element 310 can be chosen the second inductive axis Y1 that only is separated with one second inductive axis Y2 mutually and be used as one second axis of reference; And the sensing signal of using the corresponding second inductive axis Y3 (being aforesaid specific inductive axis) to compare and calculating with the corresponding second inductive axis Y1 (being aforesaid axis of reference), exports SY3c with a sensing that obtains the corresponding second inductive axis Y3.By that analogy, scanning element 310 can be handled first inductive axis X1～X6 and second inductive axis Y1～Y6 one by one, to obtain sensing output SX1c～SX6c and the SY1c～SY6c of the corresponding first inductive axis X1～X6 of difference and second inductive axis Y1～Y6.And (be sensing output SX1c～SX6c and SY1c～SY6c) afterwards obtaining all first sense datas and second sense data; Decision element 320 is just according to these first, second sense datas, and the valid data that take out wherein decide the touch event result of detection.
Please more simultaneously with reference to Fig. 2 and Fig. 4; Can know by figure; Valid data shown in Fig. 4 include sensing output SX3c～SX5c and SY3c～SY5c; (sensing output SX3b～SX4b and SY4b) comes manyly than the valid data shown in Fig. 2, so detection circuit 300 can find out fast and accurately the pairing touch points of touch event TEc position according to these valid data.
Yet; Above-mentioned instance only is used as explanation; Be not to be used for limiting scope of the present invention; For instance; When the sensing output of obtaining the first inductive axis X3 (or second inductive axis Y3); Scanning element 310 can choose the first inductive axis X5 (or second inductive axis Y5) that only is separated with the first inductive axis X4 (or second inductive axis Y4) mutually or the farther first inductive axis X6 (or second inductive axis Y6) is used as this first axis of reference (or this second axis of reference) at interval, and exports with the sensing that the sensing signal difference of the first inductive axis X3 (or second inductive axis Y3) obtains the corresponding first inductive axis X3 (or second inductive axis Y3) through calculating selected this first axis of reference (or this second axis of reference).In other words; Not adjacent with the first specific inductive axis (or second specific inductive axis) first inductive axis (or second inductive axis) of every selection is used as this first axis of reference (or this second axis of reference); And obtain detection method thus to first sense data (or second sense data) that should the first specific inductive axis (or second specific inductive axis), all belong within protection scope of the present invention.
In sum, the invention provides a kind of detection method that increases effective detection data, when the sensing output of calculating inductive axis; Be used as an axis of reference through choosing, and produce to this sensing output that should inductive axis, thus with non-conterminous another inductive axis of this inductive axis; Just can be under the too small situation of touch points area; Still can obtain enough effective detection datas, promote the linearity of detection data, and then improve the accuracy of last touch points result of detection.
The above is merely the preferred embodiments of the present invention, and all scope of claim is done according to the present invention various variations and modification are all within protection scope of the present invention.
The main element symbol description
100 contact panels, 300 detection circuits
310 scanning elements, 320 decision elements
SX1a～SX6a, SX1b～SX6b, SX1c～SX6c sensing output
SY1a～SY6a, SY1b～SY6b, SY1c～SY6c sensing output.
Claims (8)
1. the detection method of a touch event; In order on a contact panel, to survey a touch event; Wherein said contact panel includes a plurality of first inductive axis and a plurality of second inductive axis respectively on first dimension and second dimension, said detection method includes:
To each first inductive axis:
Select the first not adjacent inductive axis to be used as first axis of reference, use first sense data that said first inductive axis and said first axis of reference obtain corresponding said first inductive axis with said first inductive axis;
Use second sense data that said second inductive axis obtains corresponding each second inductive axis; And
Obtain the touch event result of detection according to pairing complex first sense data of all said first inductive axis and pairing complex second sense data of all said second inductive axis.
2. only be separated with one first inductive axis mutually between the detection method according to claim 1, wherein said first axis of reference and said first inductive axis.
3. detection method according to claim 1, wherein use the step that said second inductive axis obtains said second sense data of corresponding each second inductive axis and comprise:
To each second inductive axis:
Select the second not adjacent inductive axis to be used as second axis of reference, use said second sense data that said second inductive axis and said second axis of reference obtain corresponding said second inductive axis with said second inductive axis.
4. only be separated with one first inductive axis mutually between the detection method according to claim 3, wherein said first axis of reference and said first inductive axis, and only be separated with one second inductive axis mutually between said second axis of reference and said second inductive axis.
5. the detection circuit of a touch event, in order on a contact panel, to survey a touch event, wherein said contact panel includes a plurality of first inductive axis and a plurality of second inductive axis respectively on first dimension and second dimension, and said detection circuit comprises:
Scanning element; Wherein to each first inductive axis; Said scanning element selects first not adjacent with said first inductive axis inductive axis to be used as first axis of reference, and uses first sense data that said first inductive axis and said first axis of reference obtain corresponding said first inductive axis; And said scanning element also obtains second sense data of corresponding each second inductive axis according to said second inductive axis; And
The decision element is coupled to said scanning element, in order to obtain the touch event result of detection according to pairing complex first sense data of all said first inductive axis and pairing complex second sense data of all said second inductive axis.
6. only be separated with one first inductive axis mutually between the detection circuit according to claim 5, wherein said first axis of reference and said first inductive axis.
7. detection circuit according to claim 5; Wherein to each second inductive axis; Said scanning element selects second not adjacent with said second inductive axis inductive axis to be used as second axis of reference, and uses said second sense data that said second inductive axis and said second axis of reference obtain corresponding said second inductive axis.
8. only be separated with one first inductive axis mutually between the detection circuit according to claim 7, wherein said first axis of reference and said first inductive axis, and only be separated with one second inductive axis mutually between said second axis of reference and said second inductive axis.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010277942.6A CN102385450B (en) | 2010-09-03 | 2010-09-03 | Detection method and detection circuit of touch event |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010277942.6A CN102385450B (en) | 2010-09-03 | 2010-09-03 | Detection method and detection circuit of touch event |
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| CN102385450A true CN102385450A (en) | 2012-03-21 |
| CN102385450B CN102385450B (en) | 2014-04-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238842A (en) * | 2013-06-11 | 2014-12-24 | 义隆电子股份有限公司 | Method for identifying non-common-ground object |
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| US20090114457A1 (en) * | 2007-11-01 | 2009-05-07 | Jia-Yih Lii | Object detection for a capacitive ITO touchpad |
| CN101493742A (en) * | 2009-03-03 | 2009-07-29 | 友达光电股份有限公司 | Touch control detecting method and capacitance touch control system |
| CN101667086A (en) * | 2008-09-04 | 2010-03-10 | 义隆电子股份有限公司 | Touch control screen and coordinate positioning method |
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2010
- 2010-09-03 CN CN201010277942.6A patent/CN102385450B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090114457A1 (en) * | 2007-11-01 | 2009-05-07 | Jia-Yih Lii | Object detection for a capacitive ITO touchpad |
| CN101667086A (en) * | 2008-09-04 | 2010-03-10 | 义隆电子股份有限公司 | Touch control screen and coordinate positioning method |
| CN101493742A (en) * | 2009-03-03 | 2009-07-29 | 友达光电股份有限公司 | Touch control detecting method and capacitance touch control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238842A (en) * | 2013-06-11 | 2014-12-24 | 义隆电子股份有限公司 | Method for identifying non-common-ground object |
| CN104238842B (en) * | 2013-06-11 | 2017-05-17 | 义隆电子股份有限公司 | Method for identifying non-common-ground object |
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| CN102385450B (en) | 2014-04-02 |
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