CN103995626A - Method and device for locating touch points on touch screen - Google Patents
Method and device for locating touch points on touch screen Download PDFInfo
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- CN103995626A CN103995626A CN201310053585.9A CN201310053585A CN103995626A CN 103995626 A CN103995626 A CN 103995626A CN 201310053585 A CN201310053585 A CN 201310053585A CN 103995626 A CN103995626 A CN 103995626A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/04166—Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
- G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04106—Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
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Abstract
The invention provides a method for locating touch points on a touch screen. The method includes the first step of conducting self-capacitance detection and mutual-capacitance detection on sensors in the touch screen to obtain a corresponding self-capacitance locating result and a corresponding mutual-capacitance detection result, wherein the sensors include the line sensors and the column sensors, the second step of obtaining a mutual-capacitance locating result according to the mutual-capacitance detection result, and the third step of determining the positions of the touch points according to the self-capacitance locating result and the mutual-capacitance locating result. By means of the method for locating the touch points on the touch screen, interference of water and a charger can be avoided and meanwhile multi-point touch is supported. The invention further provides a device for locating the touch points on the touch screen.
Description
Technical field
The present invention relates to touch screen technology field, particularly a kind of touch point localization method and device for touch-screen.
Background technology
At present, capacitance plate scan method mainly contains self-capacitance scan method and mutual capacitance scan method.Self-capacitance scanning is that the electric capacity of passage in capacitance plate and the formation of touch finger is scanned, and mutual capacitance scanning is that the electric capacity of passage in capacitance plate and passage formation is scanned.During self-capacitance scanning, be subject to the impact of water little, antijamming capability is strong, but the method can not be identified multiple point touching, generally only supports single-point and gesture.Mutual capacitance scanning can be supported multiple point touching, is widely used in high-end mobile phone and panel computer, and nearly all brand mobile phone and panel computer are all the touch-screens of mutual capacitance scanning, and still, the water proofing property of mutual capacitance scanning and antijamming capability are not as self-capacitance scanning.When carrying out mutual capacitance scanning, if there is water on capacitance plate, the mutual capacitance of scanning becomes large, if there is finger touch capacitance plate, the mutual capacitance scanning diminishes.If existing water has again finger touch on capacitance plate, what the mutual capacitance of scanning became is less.According to above-mentioned rule, can identify the situation that whether has water on capacitance plate or whether have finger touch by software, but in practical application, be difficult to solve completely.Because when capacitance plate is started shooting, can not determine and on capacitance plate, whether be attached with water, if had water above during start, the mutual capacitance that water scans after wiping diminishes, software can be judged into finger touch very large probability by accident and touched always, now, whole capacitance plate will go out noise spot always and even can cause dysfunction.In sum, self-capacitance scanning and mutual capacitance scan method all can not accurately be located the position of finger touch.
In addition, charger interference is to affect one of large problem of mutual capacitance scanning always.Charger frequency sweep frequency general and mutual capacitance screen approaches, once too approaching will the generation of sweep frequency of charger frequency and mutual capacitance screen intercouples, can cause mutual capacitance screen to dap a little.Aborning, the method that general proportion is evaded is avoided the interference of charger, allow the frequency of capacitance plate scanning try one's best away from the interfering frequency of charger generation, but the frequency that each charger produces is different, and the charger frequency of different model also differs larger, be all that the charger of each model is carried out to frequency adjustment one time aborning at present.But said method can not guarantee all products, can evade successfully, once and client's charger of having changed another specification in using will go wrong.
Summary of the invention
Object of the present invention is intended at least solve one of above-mentioned technological deficiency.
For this reason, first object of the present invention is to propose a kind of touch point localization method for touch-screen, and employing the method can not be subject to the impact of water and avoid the interference of charger, supports multiple point touching simultaneously, thus registration.Second object of the present invention is to propose the device of location, a kind of touch point for touch-screen.
For achieving the above object, first aspect present invention embodiment proposes a kind of touch point localization method for touch-screen, comprise the steps: S1, inductor in described touch-screen is carried out to self-capacitance detection and mutual capacitance detection simultaneously, obtain corresponding self-capacitance positioning result and mutual capacitance testing result, wherein, described inductor comprises row inductor and row inductor; S2, obtains mutual capacitance positioning result according to described mutual capacitance testing result; S3, determines the position of described touch point according to described self-capacitance positioning result and described mutual capacitance positioning result.
According to the touch point localization method for touch-screen of the embodiment of the present invention, by touch-screen is carried out simultaneously, self-capacitance detects and mutual capacitance detects, and can avoid the interference of water and charger, significantly promotes the waterproof effect of mutual capacitance screen.In addition, the elements of a fix of determining mutual capacitance are position, touch point, can support multiple spot coordinate.In addition, aborning, needn't regulate charger frequency, significantly improved production efficiency and expanded the scope of application, and correspondingly having reduced production cost.
For achieving the above object, second aspect present invention embodiment proposes a kind of touch point locating device for touch-screen, comprise: the first detection module simultaneously detecting and the second detection module, described first detection module is for carrying out self-capacitance detection to obtain self-capacitance positioning result to the inductor of described touch-screen, described the second detection module is for carrying out mutual capacitance detection to obtain mutual capacitance testing result to the inductor of described touch-screen, wherein, described inductor comprises row inductor and row inductor; Computing module, for obtaining mutual capacitance positioning result according to described mutual capacitance testing result; Locating module, for determining the position of described touch point according to described self-capacitance positioning result and described mutual capacitance positioning result.
According to the touch point locating device for touch-screen of the embodiment of the present invention, by first detection module and the second detection module, the self-capacitance of inductor and mutual capacitance are detected simultaneously, and obtain self-capacitance positioning result and mutual capacitance positioning result, can avoid the interference of water and charger, significantly promote the waterproof effect of mutual capacitance screen.Locating module is determined the position that the elements of a fix of mutual capacitance are touch point, can support multiple spot coordinate.In addition, reduce production cost, improved production efficiency.
The aspect that the present invention is additional and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:
Fig. 1 is the connection diagram of the capacitance plate in embodiments of the invention;
Fig. 2 is the capacitance structure that row inductor in the embodiment of the present invention and row inductor form;
Fig. 3 is the touch point localization method process flow diagram for touch-screen according to the embodiment of the present invention;
Fig. 4 is the touch point positioning device structure schematic diagram for touch-screen according to the embodiment of the present invention; And
Fig. 5 is the touch point positioning device structure schematic diagram for touch-screen according to an embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Disclosing below provides many different embodiment or example to be used for realizing different structure of the present invention.Of the present invention open in order to simplify, hereinafter the parts of specific examples and setting are described.Certainly, they are only example, and object does not lie in restriction the present invention.In addition, the present invention can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and object clearly, itself do not indicate the relation between discussed various embodiment and/or setting.In addition, the various specific technique the invention provides and the example of material, but those of ordinary skills can recognize the property of can be applicable to of other techniques and/or the use of other materials.In addition, First Characteristic described below Second Characteristic it " on " structure can comprise that the first and second Characteristics creations are for the direct embodiment of contact, also can comprise the embodiment of other Characteristics creation between the first and second features, such the first and second features may not be direct contacts.
In description of the invention, it should be noted that, unless otherwise prescribed and limit, term " installation ", " being connected ", " connection " should be interpreted broadly, for example, can be mechanical connection or electrical connection, also can be the connection of two element internals, can be to be directly connected, and also can indirectly be connected by intermediary, for the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term.
With reference to description and accompanying drawing below, these and other aspects of embodiments of the invention will be known.These describe and accompanying drawing in, specifically disclose some specific implementations in embodiments of the invention, represent to implement some modes of the principle of embodiments of the invention, still should be appreciated that the scope of embodiments of the invention is not limited.On the contrary, embodiments of the invention comprise spirit and all changes within the scope of intension, modification and the equivalent that falls into additional claims.
The touch point localization method for touch-screen that 1 to 3 description proposes according to first aspect present invention embodiment with reference to the accompanying drawings.
As illustrated in fig. 1 and 2, first the electric capacity touch point localization method for touch-screen of the structure of the touch-screen adopting in the embodiment of the present invention and the embodiment of the present invention being detected is simply introduced, be illustrated in figure 1 the touch-screen in the embodiment of the present invention, by row inductor X1 ~ Xn and row inductor Y1 ~ Yn, formed.Fig. 2 is the capacitance structure that row inductor X1 and row inductor Y1 form, and wherein C1 is the self-capacitance of row inductor induction channels, and C2 is the self-capacitance of row inductor induction channels.C3 is the mutual capacitance that row inductor X1 and row inductor Y1 form, self-capacitance inductor and with the formed electric capacity of inductor of its vertical direction.Row inductor is connected with capacitive detection module 101 with row inductor, and transfers data to host computer 102 by capacitive detection module 101, positions processing.The touch point localization method of the embodiment of the present invention is exactly that the variation that detects self-capacitance C1 and C2 and mutual capacitance C3 judges accordingly, obtains the position of touch point.
As shown in Figure 3, the touch point localization method for touch-screen of the embodiment of the present invention, comprises the following steps:
S1 carries out self-capacitance detection and mutual capacitance detection to the inductor in touch-screen simultaneously, obtains corresponding self-capacitance positioning result and mutual capacitance testing result, and wherein, inductor comprises row inductor and row inductor.
In one embodiment of the invention, touch-screen is carried out to self-capacitance detection and mutual capacitance detection simultaneously, in self-capacitance detects, while detecting the induction channels of inductor composition, need to discharge and recharge, in the present embodiment, self-capacitance detects and carries out the energy that charge and discharge process can adopt square wave form, and the transmitting terminal excitation that mutual capacitance needs while detecting can be also square wave form, so self-capacitance detects when discharging and recharging, mutual capacitance is encouraged, i.e. self-capacitance detection and mutual capacitance detect to be carried out simultaneously.
In one embodiment of the invention, inductor in touch-screen is carried out to self-capacitance detection, specifically comprise: when each the row inductor in touch-screen is applied to excitation, detect the influence value of row inductor, if the influence value of row inductor is greater than preset value, the behavior self-capacitance home row that row inductor is corresponding.Then, when each the row inductor in touch-screen is applied to excitation, detect the influence value of row inductor, if the influence value of row inductor is greater than preset value, the self-capacitance location of classifying as that row inductor is corresponding is listed as.By the home row of self-capacitance and the positioning result of location row acquisition self-capacitance.For example each the row inductor X1 ~ Xn in touch-screen is applied to when excitation, detect the influence value of row inductor X1 ~ Xn, if wherein the influence value of row inductor X5, X6, X9 is greater than preset value, row inductor X5, X6, behavior self-capacitance home row that X9 is corresponding.When each the row inductor Y1 ~ Yn in touch-screen is applied to excitation, detect the influence value of row inductor Y1 ~ Yn, if wherein the influence value of row inductor Y4, Y7, Y9 is greater than preset value, row inductor Y4, Y7, Y9 are corresponding classifies self-capacitance location row as, the positioning result that the coordinate of 9 points that row inductor X5, X6, X9 be expert at and row inductor Y4, Y7, Y9 column are intersected is self-capacitance.
In an embodiment of the present invention, self-capacitance detects the square wave that carries out charge and discharge process employing and for mutual capacitance detects, provides excitation simultaneously, when the inductor in touch-screen carries out self-capacitance detection, inductor in touch-screen is carried out to mutual capacitance detection, mutual capacitance detects and specifically comprises: when each the row inductor in touch-screen is applied to excitation, detect the influence value of all row inductors, if the influence value of row inductor is greater than preset value, row inductor is electric capacity anchor point with the intersection point of the corresponding row inductor that applies excitation.Or, each the row inductor in touch-screen is applied to when excitation, detect the influence value of all row inductors, if the influence value of row inductor is greater than preset value, row inductor is mutual capacitance anchor point with the intersection point of the corresponding row inductor that applies excitation.For example, while the row inductor X1 in touch-screen being applied to excitation, detect the influence value of row inductor Y1 ~ Yn, if wherein the influence value of inductor Y1, Y3, Y5, Y8 is greater than preset value, the intersection point of row inductor X1 and row inductor Y1, Y3, Y5, Y8 is mutual capacitance anchor point, in turn, when the row inductor X2 ~ Xn in touch-screen is applied respectively to excitation, detect the influence value of row inductor Y1 ~ Yn, and the row inductor that influence value is wherein greater than preset value is defined as to electric capacity anchor point with the corresponding intersection point that applies the row inductor of excitation.Or, when the row inductor Y1 in touch-screen is applied to excitation, detect the influence value of all row inductor X1 ~ Xn, if row inductor X3 wherein, X5, X6, the influence value of X8 is greater than preset value, row inductor X3, X5, X6, X8 is mutual capacitance anchor point with the intersection point of the corresponding row inductor Y1 that applies excitation, in turn, when the row inductor Y2 ~ Yn in touch-screen is applied respectively to excitation, detect the influence value of row inductor X1 ~ Xn, and the row inductor that influence value is wherein greater than preset value is defined as to mutual capacitance anchor point with the corresponding intersection point that applies the row inductor of excitation.In the present embodiment, mutual capacitance can be detected to data and present with the form of matrix, a plurality of mutual capacitance anchor points of acquisition are the testing result that mutual capacitance detects, i.e. mutual capacitance testing result is matrix data.
S2, obtains mutual capacitance positioning result according to mutual capacitance testing result.
According to the mutual capacitance anchor point obtaining in step S1, calculate the elements of a fix that obtain mutual capacitance.Particularly, in one embodiment of the invention, by step S1, obtaining mutual capacitance testing result data is matrix data, the capacitance of inductor when the baseline that matrix data is deducted to corresponding touch-screen deducts correspondence position and there is no finger touch, and the difference table of acquisition is as shown in table 1:
Table 1
| ? | Y1 | Y2 | Y3 | Y4 | Y5 | Y6 | Y7 | Y8 | Y9 | Y10 | Y11 |
| X1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X3 | 0 | 0 | 0 | 77 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X4 | 0 | 0 | 208 | 688 | 60 | 0 | 0 | 0 | 0 | 0 | 0 |
| X5 | 0 | 0 | 0 | 148 | 0 | 0 | 0 | 96 | 532 | 67 | 0 |
| X6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 112 | 560 | 131 | 0 |
| X7 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X9 | 0 | 416 | 280 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X10 | 0 | 512 | 616 | 0 | 0 | 64 | 416 | 0 | 0 | 0 | 0 |
| X11 | 0 | 0 | 0 | 0 | 0 | 630 | 1464 | 624 | 0 | 0 | 0 |
| X12 | 0 | 0 | 0 | 0 | 0 | 356 | 1120 | 477 | 0 | 0 | 0 |
| X13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X15 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X17 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X18 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| X20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
If the data in difference surpass threshold value, be judged as finger touch, for example establishing threshold value is 500, in table 1, the difference at the intersection point place of row inductor X11, X12 and row inductor Y7 is " 1464 " " 1120 ", is finger touch point.Adopt matrix coordinate algorithm to obtain the corresponding coordinate of each finger, calculate and obtain mutual capacitance positioning result.Wherein matrix coordinate algorithm is that known technology repeats no more.
S3, determines the position of touch point according to self-capacitance positioning result and mutual capacitance positioning result.
The self-capacitance home row that the row value of the elements of a fix of the mutual capacitance that step S2 is obtained or train value and step S1 obtain or self-capacitance location row compare, if identical, but it should be noted that, because there is the error that detects error or calculating, if the row value of the elements of a fix of mutual capacitance or train value and self-capacitance home row or self-capacitance location row are roughly the same, the position that elements of a fix of mutual capacitance are touch point.
According to the touch point localization method for touch-screen of the embodiment of the present invention, by touch-screen is carried out simultaneously, self-capacitance detects and mutual capacitance detects, and can avoid the interference of water and charger, significantly promotes the waterproof effect of mutual capacitance screen.In addition, the elements of a fix of determining mutual capacitance are position, touch point, can support multiple spot coordinate.In addition, aborning, needn't regulate charger frequency, significantly promoted production efficiency and expanded the scope of application, and correspondingly having reduced production cost.
A kind of touch point locating device for touch-screen proposing according to second aspect present invention embodiment is described with reference to the accompanying drawings.
As shown in Figure 4, the touch point locating device for touch-screen of the embodiment of the present invention, comprising: first detection module 401, the second detection module 402, computing module 403 and locating module 404.Wherein, first detection module 401 and the second detection module 402 detect simultaneously, and first detection module 401 is for carrying out self-capacitance detection to obtain self-capacitance positioning result to the inductor of touch-screen.The second detection module 402 is for carrying out mutual capacitance detection to obtain mutual capacitance testing result to the inductor of touch-screen, inductor comprises row inductor and row inductor.As shown in Figure 4, one end of first detection module 401 and the second detection module 402 is connected with the circuit model of capacitance plate respectively.Computing module 403 is for obtaining mutual capacitance positioning result according to mutual capacitance testing result.Locating module 404 is for determining the position of touch point according to self-capacitance positioning result and mutual capacitance positioning result.It should be noted that, first detection module 401 and the second detection module 402 are corresponding with above-mentioned capacitive detection module 101, say, capacitive detection module 101 can comprise first detection module 401 and the second detection module 402.In addition, aforesaid host computer 102 can be computing module 403 and locating module 404.
Further, as shown in Figure 5, first detection module 401 comprises: the first exciting unit 501, row detecting unit 502 and row detecting unit 503.Wherein, the first exciting unit 501 applies respectively excitation for all row inductors or row inductor to touch-screen.Row detecting unit 502 detects the influence value of row inductor while applying excitation for each the row inductor when 501 pairs of touch-screens of the first exciting unit, when the influence value of the inductor of being expert at is greater than preset value, and the behavior self-capacitance home row that row inductor is corresponding.Row detecting unit 503 detects the influence value of row inductor while applying excitation for each the row inductor when 501 pairs of touch-screens of the first exciting unit, when the influence value of row inductor is greater than preset value, the self-capacitance location of classifying as that row inductor is corresponding is listed as.
In one embodiment of the invention, the inductor in 401 pairs of touch-screens of first detection module carries out self-capacitance detection and obtains self-capacitance positioning result, and excitation is provided when the first exciting unit 501 carries out mutual capacitance detection for the second detection module 402 simultaneously.Particularly, when each the row inductor in 501 pairs of touch-screens of the first exciting unit applies excitation, row detecting unit 502 detects the influence value of row inductor, if the influence value of row inductor is greater than preset value, and the behavior self-capacitance home row that row inductor is corresponding.Then, when each the row inductor in the first 501 pairs of exciting units touch-screen applies excitation, row detecting unit 503 detects the influence value of row inductor, if the influence value of row inductor is greater than preset value, the self-capacitance location of classifying as that row inductor is corresponding is listed as.First detection module 401 is by the home row of self-capacitance and the positioning result of location row acquisition self-capacitance.For example, when each the row inductor X1 ~ Xn in 501 pairs of touch-screens of the first exciting unit applies excitation, row detecting unit 502 detects the influence value of row inductor X1 ~ Xn, if wherein the influence value of row inductor X5, X6, X9 is greater than preset value, row inductor X5, X6, behavior self-capacitance home row that X9 is corresponding.When each the row inductor Y1 ~ Yn in the first 501 pairs of exciting units touch-screen applies excitation, row detecting unit 503 detects the influence value of row inductor Y1 ~ Yn, if wherein the influence value of row inductor Y4, Y7, Y9 is greater than preset value, row inductor Y4, Y7, Y9 are corresponding classifies self-capacitance location row as, and first detection module 401 detects the positioning result that the coordinate of 9 points that row inductor X5, X6, X9 be expert at and row inductor Y4, Y7, Y9 column intersect is self-capacitance.
In another embodiment of the present invention, first detection module 401 and the second detection module 402 detect simultaneously, the second detection module 402 detects the influence value of all row inductors while also applying excitation for each the row inductor at 501 pairs of touch-screens of the first exciting unit, when the influence value of row inductor is greater than preset value, row inductor is mutual capacitance anchor point with the intersection point of the corresponding row inductor that applies excitation.Or, each row inductor in 501 pairs of touch-screens of the first exciting unit detects the influence value of all row inductors while applying excitation, when the influence value of row inductor is greater than preset value, row inductor is mutual capacitance anchor point with the intersection point of the corresponding row inductor that applies excitation.For example, when the row inductor X1 in 501 pairs of touch-screens of the first exciting unit applies excitation, the second detection module 402 detects the influence value of row inductor Y1 ~ Yn, if inductor Y1 wherein, Y3, Y5, the influence value of Y8 is greater than preset value, row inductor X1 and row inductor Y1, Y3, Y5, the intersection point of Y8 is mutual capacitance anchor point, in turn, when the row inductor X2 ~ Xn in the first 501 pairs of exciting units touch-screen applies respectively excitation, the second detection module 402 detects the influence value of row inductor Y1 ~ Yn, and the row inductor that influence value is wherein greater than preset value is defined as to mutual capacitance anchor point with the corresponding intersection point that applies the row inductor of excitation.Or, when the row inductor Y1 in 501 pairs of touch-screens of the first exciting unit applies excitation, the second detection module 402 detects the influence value of all row inductor X1 ~ Xn, if row inductor X3 wherein, X5, X6, the influence value of X8 is greater than preset value, row inductor X3, X5, X6, X8 is mutual capacitance anchor point with the intersection point of the corresponding row inductor Y1 that applies excitation, in turn, when the row inductor Y2 ~ Yn in 501 pairs of touch-screens of the first exciting unit applies respectively excitation, the second detection module 402 detects the influence value of row inductor X1 ~ Xn, and the row inductor that influence value is wherein greater than preset value is defined as to mutual capacitance anchor point with the corresponding intersection point that applies the row inductor of excitation.
In one embodiment of the invention, the second detection module 402 detects the mutual capacitance testing result of acquisition touch-screen and determines after a plurality of mutual capacitance anchor points, by computing module 403, according to mutual capacitance anchor point, calculated the elements of a fix that obtain mutual capacitance, obtain the positioning result of mutual capacitance.
In one embodiment of the invention, after first detection module 401 obtains self-capacitance positioning result and computing module 403 calculating acquisition mutual capacitance positioning results, by locating module 404, the row value of the elements of a fix of mutual capacitance or train value and self-capacitance home row or self-capacitance location row are compared, and when value is identical, it should be noted that, because there is the error that detects error or calculating, if the row value of the elements of a fix of mutual capacitance or train value and self-capacitance home row or self-capacitance location row are roughly the same, the position that the elements of a fix of determining mutual capacitance are touch point.
In sum, according to the touch point locating device for touch-screen of the embodiment of the present invention, by first detection module and the second detection module, the self-capacitance of inductor and mutual capacitance are detected simultaneously, and obtain self-capacitance positioning result and mutual capacitance positioning result, can avoid the interference of water and charger, significantly promote the waterproof effect of mutual capacitance screen.Locating module can accurately be determined the position of touch point according to self-capacitance positioning result and mutual capacitance positioning result, and supports multiple spot coordinate.In addition, reduce production cost, improved production efficiency.
In process flow diagram or any process of otherwise describing at this or method describe and can be understood to, represent to comprise that one or more is for realizing module, fragment or the part of code of executable instruction of the step of specific logical function or process, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can be not according to order shown or that discuss, comprise according to related function by the mode of basic while or by contrary order, carry out function, this should be understood by embodiments of the invention person of ordinary skill in the field.
The logic and/or the step that in process flow diagram, represent or otherwise describe at this, for example, can be considered to for realizing the sequencing list of the executable instruction of logic function, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise that the system of processor or other can and carry out the system of instruction from instruction execution system, device or equipment instruction fetch), use, or use in conjunction with these instruction execution systems, device or equipment.With regard to this instructions, " computer-readable medium " can be anyly can comprise, storage, communication, propagation or transmission procedure be for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically of computer-readable medium (non-exhaustive list) comprises following: the electrical connection section (electronic installation) with one or more wirings, portable computer diskette box (magnetic device), random-access memory (ram), ROM (read-only memory) (ROM), the erasable ROM (read-only memory) (EPROM or flash memory) of editing, fiber device, and portable optic disk ROM (read-only memory) (CDROM).In addition, computer-readable medium can be even paper or other the suitable medium that can print described program thereon, because can be for example by paper or other media be carried out to optical scanning, then edit, decipher or process in electronics mode and obtain described program with other suitable methods if desired, be then stored in computer memory.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, a plurality of steps or method can realize with being stored in storer and by software or the firmware of suitable instruction execution system execution.For example, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: have for data-signal being realized to the discrete logic of the logic gates of logic function, the special IC with suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is to come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, this program, when carrying out, comprises step of embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can be also that the independent physics of unit exists, and also can be integrated in a module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and also can adopt the form of software function module to realize.If described integrated module usings that the form of software function module realizes and during as production marketing independently or use, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium of mentioning can be ROM (read-only memory), disk or CD etc.
In the description of this instructions, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present invention is by claims and be equal to and limit.
Claims (10)
1. for a touch point localization method for touch-screen, it is characterized in that, comprise the steps:
S1 carries out self-capacitance detection and mutual capacitance detection to the inductor in described touch-screen simultaneously, obtains corresponding self-capacitance positioning result and mutual capacitance testing result, and wherein, described inductor comprises row inductor and row inductor;
S2, obtains mutual capacitance positioning result according to described mutual capacitance testing result;
S3, determines the position of described touch point according to described self-capacitance positioning result and described mutual capacitance positioning result.
2. the touch point localization method for touch-screen as claimed in claim 1, is characterized in that, in described step S1, described inductor in touch-screen is carried out to self-capacitance detection, specifically comprises:
When each the row inductor in described touch-screen is applied to excitation, detect the influence value of described row inductor, if the influence value of described row inductor is greater than preset value, the behavior self-capacitance home row that described row inductor is corresponding;
When each the row inductor in described touch-screen is applied to excitation, detect the influence value of described row inductor, if the influence value of described row inductor is greater than preset value, the self-capacitance location of classifying as that described row inductor is corresponding is listed as.
3. the touch point localization method for touch-screen as claimed in claim 2, is characterized in that, in described step S1, described inductor in touch-screen is carried out to mutual capacitance detection, specifically comprises:
Each row inductor in described touch-screen is applied to when excitation, detect the influence value of all row inductors, if the influence value of described row inductor is greater than preset value, described row inductor is mutual capacitance anchor point with the intersection point of the corresponding row inductor that applies excitation; Or,
Each row inductor in described touch-screen is applied to when excitation, detect the influence value of all row inductors, if the influence value of described row inductor is greater than preset value, described row inductor is mutual capacitance anchor point with the intersection point of the corresponding row inductor that applies excitation.
4. the touch point localization method for touch-screen as claimed in claim 3, is characterized in that, described step S2 is specially:
According to described mutual capacitance anchor point, calculate the elements of a fix that obtain mutual capacitance.
5. the touch point localization method for touch-screen as claimed in claim 4, is characterized in that, described step S3 is specially:
The row value of the elements of a fix of described mutual capacitance or train value and described self-capacitance home row or described self-capacitance location row are compared, if identical, the position that elements of a fix of described mutual capacitance are described touch point.
6. for a touch point locating device for touch-screen, it is characterized in that, comprising:
The first detection module simultaneously detecting and the second detection module, described first detection module is for carrying out self-capacitance detection to obtain self-capacitance positioning result to the inductor of described touch-screen, described the second detection module is for carrying out mutual capacitance detection to obtain mutual capacitance testing result to the inductor of described touch-screen, wherein, described inductor comprises row inductor and row inductor;
Computing module, for obtaining mutual capacitance positioning result according to described mutual capacitance testing result;
Locating module, for determining the position of described touch point according to described self-capacitance positioning result and described mutual capacitance positioning result.
7. the touch point locating device for touch-screen as claimed in claim 6, is characterized in that, described first detection module further comprises:
The first exciting unit, applies respectively excitation for all row inductors or row inductor to described touch-screen;
Row detecting unit, for detect the influence value of described row inductor when described the first exciting unit applies excitation to each row inductor of described touch-screen, when the influence value of described row inductor is greater than preset value, the behavior self-capacitance home row that described row inductor is corresponding;
Row detecting unit, for detect the influence value of described row inductor when described the first exciting unit applies excitation to each row inductor of described touch-screen, when the influence value of described row inductor is greater than preset value, the self-capacitance location of classifying as that described row inductor is corresponding is listed as.
8. the touch point locating device for touch-screen as claimed in claim 7, is characterized in that,
Described the second detection module also for detecting the influence value of all row inductors when described the first exciting unit applies excitation to each row inductor of described touch-screen, when the influence value of described row inductor is greater than preset value, described row inductor is mutual capacitance anchor point with the intersection point of the corresponding row inductor that applies excitation; Or,
Described the second detection module for detecting the influence value of all row inductors when described the first exciting unit applies excitation to each row inductor of described touch-screen, when the influence value of described row inductor is greater than preset value, described row inductor is mutual capacitance anchor point with the intersection point of the corresponding row inductor that applies excitation.
9. the touch point locating device for touch-screen as claimed in claim 8, is characterized in that, described computing module is also for calculating the elements of a fix that obtain mutual capacitance according to described mutual capacitance anchor point.
10. the touch point locating device for touch-screen as claimed in claim 9, it is characterized in that, described locating module is also for the row value of the elements of a fix of described mutual capacitance or train value and described self-capacitance home row or described self-capacitance location row are compared, and when value is identical, determines the position that the elements of a fix of described mutual capacitance are described touch point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310053585.9A CN103995626B (en) | 2013-02-19 | 2013-02-19 | A kind of touch independent positioning method and device for touch-screen |
| PCT/CN2014/072257 WO2014127716A1 (en) | 2013-02-19 | 2014-02-19 | Method and apparatus for positioning touch point on touch screen |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310053585.9A CN103995626B (en) | 2013-02-19 | 2013-02-19 | A kind of touch independent positioning method and device for touch-screen |
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| CN103995626B CN103995626B (en) | 2018-05-29 |
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| CN103995626B (en) | 2018-05-29 |
| WO2014127716A1 (en) | 2014-08-28 |
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Address after: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee after: BYD Semiconductor Co.,Ltd. Address before: 518119 No.1 Yan'an Road, Kuiyong street, Dapeng New District, Shenzhen City, Guangdong Province Patentee before: SHENZHEN BYD MICROELECTRONICS Co.,Ltd. |