CN101526865A - Method for sensing multi-finger touch by touch pad - Google Patents
Method for sensing multi-finger touch by touch pad Download PDFInfo
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- CN101526865A CN101526865A CN200810085325A CN200810085325A CN101526865A CN 101526865 A CN101526865 A CN 101526865A CN 200810085325 A CN200810085325 A CN 200810085325A CN 200810085325 A CN200810085325 A CN 200810085325A CN 101526865 A CN101526865 A CN 101526865A
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Abstract
The invention relates to a method for sensing multi-finger touch by a touch pad, wherein the touch pad comprises a plurality of scan lines, and the method comprises the following steps: scanning the scan lines sequentially; checking whether each scan line generates a plurality of induction values larger than a threshold value, if the induction values are larger than the threshold value, rechecking whether the scan lines of which the induction values is larger than the threshold value are adjacent to one another; if the scan lines are adjacent to one another, finding out at least one corresponding scanning line group; and determining that the scanning lines have finger touches with the number corresponding to that of the groups according to the number of the groups. Thus, with the method, the number and the positions of multiple fingers can be determined effectively, and the scanning sensing of the touch pad can be prevented from being interfered by noises to cause wrong judgments so as to achieve the aim of correctly judging whether each finger touch is surely positioned above the touch pad.
Description
Technical field
The invention relates to the method for a kind of Trackpad detecting touch-control action, be meant a kind of method of sensing multi-finger touch by touch pad especially.
Background technology
According to complicated day by day at present multimedia system development trend, the function that is possessed is more and more, relative operation-interface also becomes increasingly complex, yet more function just means and need on device more associative operation button be set, but under the more little exquisite more demand of each system requirements, these buttons also fail to set up in system totally; So related development dealer now just uses touch pad technology, saves majority operation button requisite space.
In brief, Trackpad is a kind of be available for users to utilize finger or other object (as pointer), on its panel directly striking slide or substitute with gesture button with control display screen on the input media that moves of cursor, add the frivolous advantage of Trackpad, so often it is incorporated into mobile computer, PDA(Personal Digital Assistant), digital player, or other only has limit and is provided with on the electronic installation in space.
Yet, detect striking that single finger touches, the device of gesture instruction such as move and leave by traditional Trackpad, in the utilization of electronic product now, apply and use; Therefore, relevant dealer in also developing at Trackpad how to differentiate the technical method that refers to the fingertip order in the last few years more, in No. 5825352 it " many fingers sense of touch survey method of emulation mousebutton on a Trackpad and running " (Multiple fingercontact sensing method for emulating mouse buttons andmouse operations on a touch sensor pad) of United States Patent (USP) case, promptly expose a kind of method of touching of utilizing the waveform of detecting Trackpad induction amount to differentiate finger.As shown in Figure 1, this method is an earlier default maximum threshold value 10 and a lowest critical value 20, again by online electric capacity that produces of scanning or the resistance variations of detecting its Trackpad 1, and whether the crest of judging formed induction amount waveform 101 is not less than aforementioned maximum threshold value 10, if wherein one scan is online when an induction amount waveform 101 only being arranged and being not less than maximum threshold value 10, then is judged to be a finger and touches; If these online two induction amount waveforms 101,102 o'clock that are formed with of scanning, remove and to judge whether the crest of this two waveform 101,102 is not less than aforementioned maximum threshold value 10 respectively earlier, if only an induction amount waveform meets, still being judged to be a finger touches, if the crest of this two waveform 101,102 is neither during less than maximum threshold value 10, continue again to check whether formed trough is not more than aforementioned lowest critical value 20 between this two waveform 101,102, if the finger that just is judged to be two independences touches.
But, as shown in Figure 2, the above-mentioned Trackpad that discloses 1 is at the discrimination technology that refers to touch, but be easy to cause erroneous judgement, particularly when the signal waveform 100 of this noise also is used for taking a decision as to whether the maximum threshold value 10 that refers to touch greater than one, promptly can be mistaken for one and refers to touch because of Trackpad 1 is subjected to noise, just among Fig. 1, reality only has finger 11 presses, and but because of the interference of noise, and can be mistaken for pressing of two fingers; Therefore, how to improve the detecting mode of Trackpad 1, the erroneous judgement that is caused effectively to prevent noise just becomes the direction that relevant dealer institute desire is made great efforts research.
Summary of the invention
The present invention's purpose, promptly provide a kind of can avoid noise and can identification the method for detecting of the one dimension that many fingers touch on the Trackpad.
Another object of the present invention, promptly provide a kind of can avoid noise and can identification the method for detecting of the two dimension that many fingers touch on the Trackpad.
The method of the present invention's sensing multi-finger touch by touch pad, this Trackpad comprises plural sweep trace, comprises following steps:
(a) scan these sweep traces;
(b) check respectively whether this sweep trace produces the influence value of plural number greater than a threshold value, if then carry out next step; And
(c) check that these influence values are at least two adjacent greater than whether having in the sweep trace of this threshold value, if then find out corresponding at least one scanning linear group, and, determine the online finger of these scannings and touch with corresponding this group's quantity according to this group's quantity.
The method of described sensing multi-finger touch by touch pad, its method more comprises one and is positioned at it (d) step after this (c) step, check whether this is not more than a reference value with reference to the sweep trace quantity that finger touches the interior influence value that produces, if, then respectively this reference finger touches and is real finger and touches, if not, then each touches with reference to finger and comprises that plural real finger touches.
The method of described sensing multi-finger touch by touch pad in this (c) step, if not adjacent between these sweep traces of generation influence value, judges that then in the online influence value that produces of these scannings be noise in its method.
The method of described sensing multi-finger touch by touch pad, its method more comprise one and are positioned at it (e) step after this (d) step, and the influence value in touching according to respectively this real finger of being judged is obtained each centre of gravity place, and to indicate each centre of gravity place respectively be that a finger touches the source.
The method of described sensing multi-finger touch by touch pad, in its method in this (b) step, if when these sweep traces do not have the influence value of checking out greater than this threshold value, repeating step (a) then.
The method of described sensing multi-finger touch by touch pad, in this (a) step, the mode that scans these sweep traces can be line by line or the cross-cross skip line scanning in its method.
The method of the present invention's sensing multi-finger touch by touch pad, this Trackpad comprise plural first sweep trace and plural number and the second staggered sweep trace of these first sweep traces, comprise following steps:
(a) scan these first sweep traces and second sweep trace;
(b) check whether these first sweep traces produce the influence value of plural number greater than a threshold value, if then carry out next step;
(c) check whether have in first sweep trace of these influence values greater than this threshold value at least two adjacent, if find out corresponding at least one sweep trace first group, and carry out next step;
(d) check whether these second sweep traces produce the influence value of plural number greater than a threshold value, if then carry out next step; And
(e) check whether these influence values are adjacent greater than these second sweep traces of this threshold value, if find out corresponding at least one sweep trace second group.
(f) relatively whether the quantity of this first and second group equates, if, then judge in these first sweep traces and the online finger that has corresponding this first group quantity altogether of second scanning and touch, if not, then touch by the finger of being judged with the group number of negligible amounts.
The method of described sensing multi-finger touch by touch pad, the method of its sensing multi-finger touch by touch pad, more comprise one and be positioned at it (g) step after this (f) step, check whether this is not more than a reference value with reference to first and second sweep trace quantity that finger touches the interior influence value that produces, if, then respectively this reference finger touches and is real finger and touches, and if not, then each touches with reference to finger and comprises that plural real finger touches.
The method of described sensing multi-finger touch by touch pad, if it not adjacent between these first sweep traces of generation influence value, judges that then in the online influence value that produces of these first scannings be noise in this (c) step.
The method of described sensing multi-finger touch by touch pad, if it not adjacent between these second sweep traces of generation influence value, judges that then in these first and second online influence value that produces of scanning be noise in this (e) step.11 methods according to the 8th described sensing multi-finger touch by touch pad of claim, more comprise one and be positioned at it (h) step after this (g) step, obtain each centre of gravity place according to the influence value of respectively this real finger of being judged in touching, and to indicate each centre of gravity place respectively be that a finger touches the source.
The method of described sensing multi-finger touch by touch pad, its in this (b) step, if when these first sweep traces do not have the influence value of checking out greater than this threshold value, repeating step (a) then.
The method of described sensing multi-finger touch by touch pad, it when if these second sweep traces do not have the influence value of checking out greater than this threshold value, judges that then in the online influence value that produces of these first scannings be noise in this (d) step, and repeating step (a).
The method of described sensing multi-finger touch by touch pad, it is in this (a) step, and the mode that scans these first and second sweep traces can be line by line or the cross-cross skip line scanning.
The present invention's effect is, by setting this threshold value, and comparison refers to touch the group that finds out each finger in the online influence value size that produces of each bar scanning of Trackpad individually with it, refer to that the detecting of touching judges, effectively reduce the erroneous judgement that noise caused, respectively refer to touch state on this Trackpad with correct judgement.
Description of drawings
Fig. 1 is a synoptic diagram, and the state that a known Trackpad sensing finger touches is described;
Fig. 2 is a synoptic diagram, illustrates that this known this Trackpad is subjected to the state of a noise;
Fig. 3 is a synoptic diagram, and the enforcement aspect of first preferred embodiment of the method for sensing multi-finger touch by touch pad of the present invention is described;
Fig. 4 is a synoptic diagram, and the aspect of this first preferred embodiment when detecting is described;
Fig. 5 is a synoptic diagram, illustrates that this first preferred embodiment is in detecting two and the aspect that refers to of armrest;
Fig. 6 is a process flow diagram, and the detecting steps flow chart of this first preferred embodiment is described;
Fig. 7 is a synoptic diagram, and the enforcement aspect of second preferred embodiment of the method for sensing multi-finger touch by touch pad of the present invention is described;
Fig. 8 is a synoptic diagram, and the aspect of this second preferred embodiment when detecting is described;
Fig. 9 is a process flow diagram, and the detecting step first half flow process of this second preferred embodiment is described;
Figure 10 is a process flow diagram, the latter half of flow process of detecting step of the man embodiment of this second religion of continuity explanation.
Accompanying drawing primary clustering symbol description:
21～27 steps, 301～313 steps, 4 Trackpads, 40 sweep traces, 400 noises, 401 second sweep traces, 402 first sweep traces, 41～44 sweep traces, 45 groups, 46 reference fingers touch, and 47 real finger are touched, 48 centre of gravity places, 49 first groups, 50 second groups, 60 threshold values, 61 influence values, 71 fingers.
Embodiment
About addressing other technology contents, characteristics and effect before the present invention, in the following detailed description that cooperates with reference to two graphic preferred embodiments, can clearly present.
Before the present invention is described in detail, be noted that in the following description content similarly assembly is to represent with identical numbering.
Consult Fig. 3, Fig. 4 and Fig. 5, it is first preferred embodiment of the method for sensing multi-finger touch by touch pad of the present invention, this Trackpad 4 can be condenser type, resistance-type or utilizes induction type Trackpads 4 such as electricity, light wave, sound wave, and comprises plural sweep trace 40, and the method includes the steps of:
At first, shown in step 21, scan these sweep traces 40.
Secondly, shown in step 22, check respectively whether this sweep trace 40 produces the influence value 61 of plural number greater than a threshold value 60, if, then carry out step 23, for example the influence value 61 of two sweep traces 41,42 among Fig. 4 is all greater than this threshold value 60.In this preferred embodiment, described influence value 61 is all non-actual capacitance, resistance value, the inductance value of measuring in general design, and can convert equivalent electrical circuit to, measure voltage, electric current ... etc. variety of way because this non-the present invention's feature place emphatically, so do not repeat them here; And the scan mode of the sweep trace 40 that on this Trackpad 4, is carried out, be to detect scanning one by one at these sweep traces 40 in mode in proper order, as scanning the sweep trace 40 of odd number bar earlier, scan the sweep trace 40 of even number bar again, or total sweep trace 40 is accepted detecting scanning comprehensively and side by side, so be easy to change and migrated by generally having association area background person, therefore should do not exceeded with the revealer of institute in this preferred embodiment.
In addition must supplementary notes is, in this step 22,, then return step 21 if when respectively this sweep trace 40 does not have the influence value of checking out greater than this threshold value 60 61, continue these sweep traces 40 of scanning.Yet threshold value 60 mentioned herein is on finger 71 these Trackpads 4 of touching at the user, the change value that the induction amount of its touch position (voltage, electric current etc.) is produced, a kind of reference settings value of measure, mean deviation being tried to achieve according to assessment.
Then, shown in step 23, check in the sweep trace 40 of these influence values 61 greater than this threshold value 60 whether have at least two sweep traces 40 adjacent.
If the above-mentioned "Yes" that is judged as, then shown in step 25, then find out corresponding at least one sweep trace group 45, and according to these group's 45 quantity, determine reference that has corresponding these group's 45 quantity on these sweep traces 40 and point and touch 46, and carry out step 26; For example the influence value 61 of sweep trace 41 is greater than this threshold value 60 one of among Fig. 4, and the influence value 61 of another sweep trace 42 of adjacent this sweep trace 41 is also greater than this threshold value 60, then this just representative find out a group 45; Again if on these sweep traces 40, find altogether three groups each have at least two adjacent sweep traces 40 respectively when having influence value 61 greater than this threshold value 60, i.e. representative is formed with three groups 45, just has three and touches 46 with reference to finger.
What deserves to be mentioned is, if when carrying out the inspection of above-mentioned step 23, find that those influence values 61 are all mutual when non-conterminous greater than the sweep trace 40 of this threshold value 60, then the influence value 61 that will be produced on these sweep traces 40 is judged to be the noise 400 as shown in the step 24 of Fig. 4; That is to say that present embodiment is to judge with the notion of detecting sweep trace 40 groups whether Trackpad 4 is touched, the application of this principle be since common people's finger 71 when pressing Trackpad 4, all the pressure that can form an area on this Trackpad 4 is touched, just can push sweep trace adjacent more than two 40 simultaneously at least, the variation that these (a groups) that are pressed adjacent sweep trace 40 is produced on electric capacity or the resistance inductance, therefore, in this preferred embodiment, if it is not to be that the finger 71 of an entity refers to touch that interpretation goes out this, but when causing by a noise 400, the present invention incites somebody to action and then this noise 400 is ignored and filterings, and revert to step 21 again, continue to scan these sweep traces 40.
Then, shown in step 26, check whether this is not more than a reference value with reference to sweep trace 40 quantity that finger touches the influence value that produces 61 in 46, if, then respectively this reference finger touches 46 and is real finger and touches 47, and if not, then each touches 46 with reference to finger and comprises that plural real finger touches 47.
Be described further at step 26 again at this; in this preferred embodiment; even as shown in Figure 6 two near finger 71 when on this Trackpad 4, pressing; according to the discriminant approach of above-mentioned steps 21 to step 25; only can define a reference finger and touch 46 (groups 45 just); but by step 26; can again each be touched 46 with reference to finger and carry out more deep analysis; for example after measured; when common people's real finger 71 can press sweep trace 40 quantity of touching to be no more than 3 usually; and the above-mentioned reference value of setting is three; therefore; when detecting sweep trace 40 quantity of touching the influence value that produces 61 46 in reference to finger above three the time, can analyze this and touch 46 with reference to finger and include above one real finger and touch 47.
At last, shown in step 27, obtain each centre of gravity place 48, and to indicate each centre of gravity place 48 respectively be that a finger touches the source according to the influence values 61 that respectively this real finger of being judged is touched in 47.In this preferred embodiment, the method of trying to achieve of mentioned centre of gravity place 48, be earlier each sweep trace 40 to be carried out weight to indicate, afterwards, be multiplied by respectively again to have in each group and close the induction variable quantity that on the sweep trace 40 of the influence value of threshold value, produced (as electric current, variable quantities such as voltage) and after addition again divided by the summation of all induction variable quantities, the sweep trace 40 that has numbering 1 to 8 in regular turn on the Trackpad 4 like this, and its weight also be 1 to 8 and these sweep traces 40 the variation that electric capacity is arranged on numbering 2 and 3 the sweep trace 40 wherein only arranged in a group 45, and the induction changing value was all 0.5 o'clock, then its centre of gravity place 48 is (2 * 0.5+3 * 0.5)/(0.5+0.5)=2.5, therefore the centre of gravity place 48 (just aforementioned finger touches the source) of being tried to achieve is 2.5 places, exactly in numbering 2 and between numbering among 3 the sweep trace 40, yet in practical application, also can be considered is with after respectively having the coordinate position addition greater than the influence value 61 of this threshold value 60 and adjacent again sweep trace 40, utilize simply again and ask the mode of arithmetic mean number to try to achieve or other account form, so should not be limited to the explanation of present embodiment.
Consult Fig. 7, Fig. 8, Fig. 9 and Figure 10, it is the second preferable enforcement profit of the method for sensing multi-finger touch by touch pad of the present invention, principle that it used and framework are roughly identical with the described method of this first preferred embodiment, something in common repeats no more, its difference is, sweep trace on this Trackpad 4 is that the mode with two dimension is provided with, that is to say, the Trackpad 4 of this preferred embodiment, comprise second sweep trace 401 that plural first sweep trace 402 and plural number and these first sweep traces 402 interlock, the method includes the steps of:
At first, shown in step 301, scan these first sweep traces 402 and second sweep trace 401.
What deserves to be mentioned is, above-mentioned first sweep trace 402 or second sweep trace 401 are not necessarily parallel all separately, and 401 of first sweep trace 402 and second sweep traces staggered can be vertical mutually or out of plumb all can, this is because of in practical application, and various Trackpad 4 has due to its different change of shape.
Secondly, shown in step 302, check whether these first sweep traces 402 produce the influence value 61 of plural number greater than a threshold value 60, if then carry out step 33; If when each these first sweep traces, 402 nothing of scanning are checked out greater than the influence value 61 of this threshold value 60, then return step 31, continue these first and second sweep traces 402,401 of scanning.
Then, shown in step 303, check that whether to have at least two in first sweep trace 402 of these influence values 61 greater than this threshold value 60 adjacent.
If the judged result of step 303 is a "No", then shown in step 304, this influence value 61 is judged to be noise 400.
And when the judged result of step 303 be "Yes", then shown in step 305, find out corresponding at least one sweep trace first group 49, shown in the numbering 41 in first sweep trace 402 of Fig. 8 and 42 two, this promptly defines two first groups 49.
Carry out step 307 again, check whether these second sweep traces 401 produce the influence value 61 of plural number greater than a threshold value 60.
If the judged result of step 307 is a "No", then shown in step 306, this influence value 61 also is judged to be noise 400.
And when the judged result of step 307 be "Yes", then carry out step 309, continue again to check that whether to have at least two in second sweep trace 401 of these influence values 61 greater than this threshold value 60 adjacent.
If the judged result of step 309 is a "No", then shown in step 308, judge that the influence value 61 that is produced is noise 400 on these first and second sweep traces 402,401.
And when the judged result of step 309 be "Yes", then shown in step 310, find out corresponding at least one sweep trace second group 50, shown in the numbering 43 in second sweep trace 401 of Fig. 7 and 44 two, this promptly defines one second group 50.
Come again, shown in step 311, relatively whether the quantity of this first and second group 49,50 equates, if, judge that then the reference finger that has corresponding these first group, 49 quantity on these first sweep traces 402 and second sweep trace 401 altogether touches 46, if not, then touch 46 by the reference finger of being judged with the group number of negligible amounts.For example, when on these first sweep traces 402, defining two first groups 49, but when only defining one second group 50 on these second sweep traces 401, because therefore second group, 50 quantity only can determine a reference finger and touch 46 less than first group, 49 quantity at this moment.
Then, shown in step 312, check whether this is not more than a reference value with reference to first and second sweep trace 402,401 quantity that finger touches the influence value that produces 61 in 46, if, then respectively this reference finger touches 46 and is real finger and touches 47, if not, then each touches 46 with reference to finger and comprises that plural real finger touches 47.In this preferred embodiment, touch 46 with reference to finger and touch discriminant approach on 47 the number with real finger also the step 26 in as described above first preferred embodiment is described, repeat no more so forgive this.
At last, shown in step 313, obtain each centre of gravity place 48, and to indicate each centre of gravity place respectively be that a finger touches the source according to the influence values 61 that respectively this real finger of being judged is touched in 48.In this preferred embodiment, centre of gravity place 48 try to achieve can with reference in the first aforementioned preferred embodiment in the described correlation computations explanation of step 27.
In addition, we can also be with aforementioned first, the technical characterictic that two preferred embodiments are carried, be applied on the extension function of existing Trackpad 4, as filtering noise 400 and judge certain finger 71 and press after touch, utilize the above-mentioned mode of asking centre of gravity place again, and being pointed 71 positions, the user who is sensed delivers to a discriminating gear (figure does not show), utilize this discriminating gear to detect the gesture of user's finger 71 further again, to determine whether to receive or ignore this gesture motion, and can send the mistiming according to received gesture, this is continuous action or two independent gestures to come interpretation.Because it is the present invention's technology emphasis that the said gesture that reaches is judged non-, and also known for the personage who is familiar with this correlative technology field, so no longer do more deep explanation at its utilization principle in this.
Conclude above-mentioned, the method of sensing multi-finger touch by touch pad of the present invention, by setting this threshold value 60, and comparison points 71 on this Trackpad 4 with it, whether influence value 61 that sweep trace adjacent more than two 40 produced is arranged greater than this threshold value 60, judge that the influence value 61 that the is produced finger 71 of whether serving as reasons produces on this Trackpad 4, or be noise 400, effectively to avoid disturbing the erroneous judgement that is caused because of noise 400, reach the state of correct judgement finger 71 on this Trackpad 4, so can reach the present invention's purpose really.
Claims (14)
1. the method for a sensing multi-finger touch by touch pad, this Trackpad comprises plural sweep trace, it is characterized in that described method comprises following steps:
(a) scan these sweep traces;
(b) check respectively whether this sweep trace produces the influence value of plural number greater than a threshold value, if then carry out next step; And
(c) check that these influence values are at least two adjacent greater than whether having in the sweep trace of this threshold value, if, then find out corresponding at least one scanning linear group, and according to this group's quantity, determine online reference of these scannings and point and touch with corresponding this group's quantity.
2. according to the method for the described sensing multi-finger touch by touch pad of claim 1, it is characterized in that described method more comprises one and is positioned at it (d) step after this (c) step, check whether this is not more than a reference value with reference to the sweep trace quantity that finger touches the interior influence value that produces, if, then respectively this reference finger touches and is real finger and touches, if not, then each touches with reference to finger and comprises that plural real finger touches.
3. according to the method for the described sensing multi-finger touch by touch pad of claim 2, it is characterized in that in the described method in this (c) step, if produce between these sweep traces of influence value not adjacently, judge that then in the online influence value that produces of these scannings be noise.
4. according to the method for the described sensing multi-finger touch by touch pad of claim 2, it is characterized in that described method more comprises one and is positioned at it (e) step after this (d) step, obtain each centre of gravity place according to the influence value of respectively this real finger of being judged in touching, and to indicate each centre of gravity place respectively be that a finger touches the source.
5. according to the method for the described sensing multi-finger touch by touch pad of claim 2, it is characterized in that in the described method in this (b) step, if when these sweep traces do not have the influence value of checking out greater than this threshold value, repeating step (a) then.
6. according to the method for the described sensing multi-finger touch by touch pad of claim 2, it is characterized in that in the described method that in this (a) step the mode that scans these sweep traces can be line by line or the cross-cross skip line scanning.
7. the method for a sensing multi-finger touch by touch pad, this Trackpad comprise plural first sweep trace and plural number and second sweep trace that these first sweep traces interlock, and it is characterized in that described method comprises following steps:
(a) scan these first sweep traces and second sweep trace;
(b) check whether these first sweep traces produce the influence value of plural number greater than a threshold value, if then carry out next step;
(c) check whether have in first sweep trace of these influence values greater than this threshold value at least two adjacent, if find out corresponding at least one sweep trace first group, and carry out next step;
(d) check whether these second sweep traces produce the influence value of plural number greater than a threshold value, if then carry out next step;
(e) check whether these influence values are adjacent greater than second sweep trace of this threshold value, if find out corresponding at least one sweep trace second group; And
(f) relatively whether the quantity of this first and second group equates, if, then judge in these first sweep traces and the online reference finger that has corresponding this first group quantity altogether of second scanning and touch, if not, then touch by the reference finger of being judged with the group number of negligible amounts.
8. according to the method for the described sensing multi-finger touch by touch pad of claim 7, the method that it is characterized in that described sensing multi-finger touch by touch pad, more comprise one and be positioned at it (g) step after this (f) step, check whether this is not more than a reference value with reference to first and second sweep trace quantity that finger touches the interior influence value that produces, if, then respectively this reference finger touches and is real finger and touches, and if not, then each touches with reference to finger and comprises that plural real finger touches.
9. according to the method for the described sensing multi-finger touch by touch pad of claim 8, it is characterized in that describedly in this (c) step, if produce between these first sweep traces of influence value not adjacently, judge that then in the online influence value that produces of these first scannings be noise.
10. according to the method for the described sensing multi-finger touch by touch pad of claim 8, it is characterized in that described in this (e) step, if not adjacent between these second sweep traces of generation influence value, judge that then in these first and second online influence value that produces of scanning be noise.
11. method according to the 8th described sensing multi-finger touch by touch pad of claim, more comprise one and be positioned at it (h) step after this (g) step, obtain each centre of gravity place according to the influence value of respectively this real finger of being judged in touching, and to indicate each centre of gravity place respectively be that a finger touches the source.
12. according to the method for the described sensing multi-finger touch by touch pad of claim 8, it is characterized in that described in this (b) step, if when these first sweep traces do not have the influence value of checking out greater than this threshold value, repeating step (a) then.
13. method according to the described sensing multi-finger touch by touch pad of claim 8, it is characterized in that described in this (d) step, when if these second sweep traces do not have the influence value of checking out greater than this threshold value, judge that then in the online influence value that produces of these first scannings be noise, and repeating step (a).
14. according to the method for the described sensing multi-finger touch by touch pad of claim 8, it is characterized in that described should (a) step in, the mode that scans these first and second sweep traces can be line by line or the cross-cross skip line scanning.
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| CN101937284A (en) * | 2010-09-26 | 2011-01-05 | 苏州瀚瑞微电子有限公司 | Method for detecting multi-point touch control on touch-control plate |
| CN102023775A (en) * | 2009-09-23 | 2011-04-20 | 禾瑞亚科技股份有限公司 | Position detection device and method thereof |
| CN102455811A (en) * | 2010-10-30 | 2012-05-16 | 比亚迪股份有限公司 | Method and device for detecting touch device |
| CN102591510A (en) * | 2011-01-07 | 2012-07-18 | 瑞鼎科技股份有限公司 | Control device for touch panel and signal processing method thereof |
| CN102736771A (en) * | 2011-03-31 | 2012-10-17 | 比亚迪股份有限公司 | Method and device for identifying multi-point rotation motion |
| CN102073398B (en) * | 2009-11-19 | 2013-01-02 | 升达科技股份有限公司 | Touch-sensitive method and electronic device |
| CN105391637A (en) * | 2014-08-27 | 2016-03-09 | 美国频顺通讯科技公司 | policy-based intelligent ad-hoc network architecture |
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| US5825352A (en) * | 1996-01-04 | 1998-10-20 | Logitech, Inc. | Multiple fingers contact sensing method for emulating mouse buttons and mouse operations on a touch sensor pad |
| KR100866485B1 (en) * | 2006-08-22 | 2008-11-03 | 삼성전자주식회사 | Apparatus and method for sensing movement of multi-touch points and mobile device using the same |
| CN100527066C (en) * | 2007-06-15 | 2009-08-12 | 广东威创视讯科技股份有限公司 | Infrared touch screen and its multi-point touch positioning method |
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| CN102023775A (en) * | 2009-09-23 | 2011-04-20 | 禾瑞亚科技股份有限公司 | Position detection device and method thereof |
| CN102023775B (en) * | 2009-09-23 | 2013-10-30 | 禾瑞亚科技股份有限公司 | Position detection device and method thereof |
| CN102073398B (en) * | 2009-11-19 | 2013-01-02 | 升达科技股份有限公司 | Touch-sensitive method and electronic device |
| CN101937284B (en) * | 2010-09-26 | 2012-05-30 | 苏州瀚瑞微电子有限公司 | Method for detecting multi-point touch control on touch-control plate |
| CN101937284A (en) * | 2010-09-26 | 2011-01-05 | 苏州瀚瑞微电子有限公司 | Method for detecting multi-point touch control on touch-control plate |
| CN102455811A (en) * | 2010-10-30 | 2012-05-16 | 比亚迪股份有限公司 | Method and device for detecting touch device |
| CN102591510A (en) * | 2011-01-07 | 2012-07-18 | 瑞鼎科技股份有限公司 | Control device for touch panel and signal processing method thereof |
| CN102591510B (en) * | 2011-01-07 | 2015-02-18 | 瑞鼎科技股份有限公司 | Control device for touch panel and signal processing method thereof |
| CN102736771A (en) * | 2011-03-31 | 2012-10-17 | 比亚迪股份有限公司 | Method and device for identifying multi-point rotation motion |
| CN105391637A (en) * | 2014-08-27 | 2016-03-09 | 美国频顺通讯科技公司 | policy-based intelligent ad-hoc network architecture |
| CN105391637B (en) * | 2014-08-27 | 2020-06-05 | 美国频顺通讯科技公司 | Method for communication, network node and computer-readable storage medium |
| CN109271069A (en) * | 2018-10-29 | 2019-01-25 | 深圳市德名利电子有限公司 | Second zone lookup method and touch device, mobile terminal based on capacitance touching control |
| CN109271069B (en) * | 2018-10-29 | 2021-06-29 | 深圳市德明利技术股份有限公司 | Secondary area searching method based on capacitive touch, touch device and mobile terminal |
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