CN102385450B - Detection method and detection circuit of touch event - Google Patents
Detection method and detection circuit of touch event Download PDFInfo
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- CN102385450B CN102385450B CN201010277942.6A CN201010277942A CN102385450B CN 102385450 B CN102385450 B CN 102385450B CN 201010277942 A CN201010277942 A CN 201010277942A CN 102385450 B CN102385450 B CN 102385450B
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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 in order to determine detection method and the relevant apparatus thereof of the touch points on contact panel.
Background technology
In the middle of Modern Electronic commodity, capacitance type touch-control panel is often used as the communication interface of user and machine due to characteristic simple to operation, wherein projecting type capacitor (projective capacitive) is because having support multi-point touch (multi touch), being widely used on the portable apparatus such as mobile phone, Vehicular navigation device compared with characteristics such as high transmittance and power savings.Yet, projecting type capacitor is when the measurement for contact panel, conventionally in X direction or y direction, only have several to dozens of sensing electrode (sensingelectrode), and these sensing electrodes of this contact panel can produce respectively according to the touch event on it a plurality of sensing signals, and the residual quantity between the sensing signal producing according to adjacent between two sensing electrode, produce respectively a plurality of sensing output.In the prior art, the mode of interpolation is normally used in the calculating of touch points, and what via the sensing output calculating, determine estimates peak value, or with the ratio of the sensing output valve that calculates and extreme value, estimates the distance of measurement point and extreme value.Please refer to Fig. 1, it for surveying the illustrative diagram of a touch event TEa on known contact panel 100.As shown in the figure, known contact panel 100 respectively has six inductive axis X1～X6 and Y1～Y6 in X-axis and Y-axis, and inductive axis X1～X6, Y1～Y6 have respectively corresponding sensing output valve SX1a～SX6a, SY1a～SY6a.For instance, for inductive axis X1～X6, wherein only having sensing output valve SX3a～SX5a is Effective Numerical (being the numerical value of non-zero), after the sensing signal that the sensing signal that sensing output valve SX3a detects via a detection circuit comparison inductive axis X3 and inductive axis X2 detect, calculate and obtain, similarly, the numerical value that calculates after the sensing signal that sensing output valve SX4a and sensing output valve SX5a detect via this detection circuit comparison inductive axis X4, X5 and X5, X6 and obtain respectively.Via the mode of interpolation, calculate these Effective Numericals, the position of the touch points position that just can calculate touch event TEa between inductive axis X3 and X4.In like manner, through calculating the Effective Numerical (being SY3a～SY5a) of corresponding inductive axis Y1～Y6, can show that the touch points position of touch event TEa is in the position of inductive axis Y4.
Referring again to Fig. 2, it is for surveying the illustrative diagram of another touch event TEb on known contact panel 100.Than touch event TEa, the touch points of touch event TEb is less, and its scope also cannot contain the wherein area of exploring electrode, and therefore Effective Numerical also reduces.In the example of Fig. 2, only having sensing output valve SX3b～SX4b and SY4b is Effective Numerical, therefore follow-up when calculating, and cannot utilize interpolation method accurately to obtain the position of touch points.Moreover; when touch event TEb is a dynamic touch points, for example user applies a touching pen (touch pen) and streaks contact surface plate 100, owing to lacking enough Effective Numericals; the touch points track that it detects can present nonlinear characteristic, therefore causes poor system effectiveness.
So, how to increase the valid data that detect on contact panel 100, and then the linearity that increases detection data is still this field and has a large problem to be solved.
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 to survey touch event on contact panel, wherein this contact panel includes respectively a plurality of the first inductive axis and a plurality of the second inductive axis in the first dimension and the second dimension, this detection method includes: for each first inductive axis, select the first not adjacent with this first inductive axis inductive axis to using as the first axis of reference, apply this first inductive axis and this first axis of reference and obtain the first sense data that should the first inductive axis; Apply the second sense data that these second inductive axis obtain corresponding each the second inductive axis; And obtain touch event result of detection according to all these corresponding complex first sense datas of the first inductive axis and corresponding complex the second sense data of all these the second inductive axis.
According to the detection method described in this embodiment, between wherein said the first axis of reference and described the first inductive axis, be only separated with mutually one first inductive axis.
According to the detection method described in this embodiment, wherein applying the step that described the second inductive axis obtains described second sense data of corresponding each the second inductive axis comprises: for each the second inductive axis: select the second not adjacent with described the second inductive axis inductive axis to be used as the second axis of reference, apply described the second sense data that described the second inductive axis and described the second axis of reference obtain corresponding described the second inductive axis.
Preferably, in this detection method, between described the first axis of reference and described the first inductive axis, be only separated with mutually one first inductive axis, and be only separated with mutually one second inductive axis between described the second axis of reference and described the second inductive axis.
According to another embodiment of the present invention, it provides a kind of detection circuit of touch event, in order to survey touch event on contact panel, wherein this contact panel includes respectively a plurality of the first inductive axis and a plurality of the second inductive axis in the first dimension and the second dimension, and this detection circuit includes scanning element and determines element.For each the first inductive axis, this scanning element selects the first not adjacent with this first inductive axis inductive axis to be used as the first axis of reference, and applies this first inductive axis and this first axis of reference and obtain the first sense data that should the first inductive axis; And this scanning element also obtains the second sense data of corresponding each the second inductive axis according to these second inductive axis.This decision element is coupled to this scanning element, in order to obtain touch event result of detection according to all these corresponding complex first sense datas of the first inductive axis and corresponding complex the second sense data of all these the second inductive axis.
According to the detection circuit described in this embodiment, between wherein said the first axis of reference and described the first inductive axis, be only separated with mutually one first inductive axis.
According to the detection circuit described in this embodiment, wherein for each the second inductive axis, described scanning element selects the second not adjacent with described the second inductive axis inductive axis to be used as the second axis of reference, and applies described the second sense data that described the second inductive axis and described the second axis of reference obtain corresponding described the second inductive axis.
Preferably, in this detection circuit, between described the first axis of reference and described the first inductive axis, be only separated with mutually one first inductive axis, and be only separated with mutually one second inductive axis between described the second axis of reference and described the second inductive axis.
Accompanying drawing explanation
Fig. 1 for surveying the illustrative diagram of a touch event on known contact panel.
Fig. 2 for surveying the illustrative diagram of another touch event on known contact panel.
The schematic diagram of the detection circuit that Fig. 3 realizes for an embodiment according to the present invention.
Fig. 4 surveys the illustrative diagram of touch event for an embodiment according to the present invention on a contact panel.
Embodiment
Referring to Fig. 3 and Fig. 4, the schematic diagram of the detection circuit 300 that Fig. 3 realizes for an embodiment according to the present invention, and Fig. 4 surveys the illustrative diagram of a touch event TEc for an embodiment according to the present invention on a contact panel 100, wherein the touch event TEc in Fig. 4 and the touch event TEb shown in Fig. 2 have onesize touch points area.Detection circuit 300 includes (but being not limited to) one scan element 310 and and determines element 320, and contact panel 100 respectively the first dimension (for example: X-axis) with the second dimension (for example: Y-axis), include six first inductive axis X1～X6 and six second inductive axis Y1～Y6.Note that the quantity of first, second inductive axis is only as exemplary illustration, 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 with this specific inductive axis inductive axis be used as an axis of reference, and apply this inductive axis and this axis of reference and obtain a sense data that should specific inductive axis (obtain to should specific inductive axis this sensing output).
For instance, when scanning element 310 is when the sensing that obtains the first inductive axis X3 is exported, scanning element 310 can be chosen the first inductive axis X1 that is only separated with mutually the first inductive axis X2 and be used as the first axis of reference, and the sensing signal of applying corresponding the first inductive axis X3 (being aforesaid specific inductive axis) to be compared and calculating with corresponding the first inductive axis X1 (being aforesaid axis of reference), to obtain the sensing of corresponding the first inductive axis X3, export SX3c; In like manner, when scanning element 310 is when the sensing that obtains the second inductive axis Y3 is exported, scanning element 310 can be chosen the second inductive axis Y1 that is only separated with mutually one second inductive axis Y2 and be used as one second axis of reference, and the sensing signal of applying corresponding the second inductive axis Y3 (being aforesaid specific inductive axis) to be compared and calculating with corresponding the second inductive axis Y1 (being aforesaid axis of reference), to obtain a sensing of corresponding the second inductive axis Y3, export SY3c.By that analogy, scanning element 310 can be processed 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 obtaining all the first sense datas and the second sense data (being sensing output SX1c～SX6c and SY1c～SY6c) afterwards, determine that element 320 is just according to these first, second sense datas, the valid data that take out wherein decide touch event result of detection.
Please more simultaneously with reference to Fig. 2 and Fig. 4, as seen from the figure, valid data shown in Fig. 4 include sensing output SX3c～SX5c and SY3c～SY5c, than the valid data shown in Fig. 2 (sensing output SX3b～SX4b and SY4b), come manyly, so detection circuit 300 can find out fast and accurately the corresponding touch points of touch event TEc position according to these valid data.
Yet, above-mentioned example is only used as explanation, not 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 be chosen the first inductive axis X5 (or second inductive axis Y5) or farther the first inductive axis X6 (or second inductive axis Y6) in interval that are only separated with mutually the first inductive axis X4 (or second inductive axis Y4) and be used as this first axis of reference (or this second axis of reference), and export with the poor sensing that obtains corresponding the first inductive axis X3 (or second inductive axis Y3) of sensing signal of the first inductive axis X3 (or second inductive axis Y3) by 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) the 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 thus the detection method to the first sense data (or second sense data) that should the first specific inductive axis (or second specific inductive axis), within all belonging to 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, by choosing with non-conterminous another inductive axis of this inductive axis, be used as an axis of reference, and produce to this sensing output that should inductive axis, thus, just can be in the situation that touch points area be too small, 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 foregoing is only the preferred embodiments of the present invention, all various variations and modifications of doing according to the scope of the claims in the present invention, all within protection scope of the present invention.
Main element symbol description
100 contact panel 300 detection circuits
310 scanning elements 320 determine element
SX1a～SX6a, SX1b～SX6b, the output of SX1c～SX6c sensing
SY1a～SY6a, SY1b～SY6b, the output of SY1c～SY6c sensing.
Claims (8)
1. the detection method of a touch event, in order to survey a touch event on a contact panel, wherein said contact panel includes respectively a plurality of the first inductive axis and a plurality of the second inductive axis in the first dimension and the second dimension, and described detection method includes:
For each specific the first inductive axis:
Select other not adjacent with described specific the first inductive axis first inductive axis to be used as the first axis of reference, apply the first sense data that described the first inductive axis and described the first axis of reference obtain corresponding described specific the first inductive axis;
Apply the second sense data that described the second inductive axis obtains corresponding each the second inductive axis; And
According to corresponding complex the first sense data of all described the first inductive axis and corresponding complex the second sense data of all described the second inductive axis, obtain touch event result of detection.
2. detection method according to claim 1, is only separated with one first inductive axis between wherein said the first axis of reference and described the first inductive axis mutually.
3. detection method according to claim 1, wherein apply the step that described the second inductive axis obtains described second sense data of corresponding each the second inductive axis and comprise:
For each specific the second inductive axis:
Select other not adjacent with described specific the second inductive axis second inductive axis to be used as the second axis of reference, apply described the second sense data that described the second inductive axis and described the second axis of reference obtain corresponding described specific the second inductive axis.
4. detection method according to claim 3, is only separated with one first inductive axis between wherein said the first axis of reference and described the first inductive axis mutually, and is only separated with mutually one second inductive axis between described the second axis of reference and described the second inductive axis.
5. a detection circuit for touch event, in order to survey a touch event on a contact panel, wherein said contact panel includes respectively a plurality of the first inductive axis and a plurality of the second inductive axis in the first dimension and the second dimension, and described detection circuit comprises:
Scanning element, wherein for each specific the first inductive axis, described scanning element selects other not adjacent with described specific the first inductive axis first inductive axis to be used as the first axis of reference, and applies the first sense data that described the first inductive axis and described the first axis of reference obtain corresponding described specific the first inductive axis; And described scanning element also obtains the second sense data of corresponding each the second inductive axis according to described the second inductive axis; And
Determine element, be coupled to described scanning element, in order to obtain touch event result of detection according to corresponding complex the first sense data of all described the first inductive axis and corresponding complex the second sense data of all described the second inductive axis.
6. detection circuit according to claim 5, is only separated with one first inductive axis between wherein said the first axis of reference and described the first inductive axis mutually.
7. detection circuit according to claim 5, wherein for each specific the second inductive axis, described scanning element selects other not adjacent with described specific the second inductive axis second inductive axis to be used as the second axis of reference, and applies described the second sense data that described the second inductive axis and described the second axis of reference obtain corresponding described specific the second inductive axis.
8. detection circuit according to claim 7, is only separated with one first inductive axis between wherein said the first axis of reference and described the first inductive axis mutually, and is only separated with mutually one second inductive axis between described the second axis of reference and described the second inductive axis.
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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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| 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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| TWI360770B (en) * | 2007-11-01 | 2012-03-21 | Elan Microelectronics Corp | Object detection for a capacitive ito touchpad |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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