CN100527060C - Method of touch pad for detecting movements of multiple objects - Google Patents
Method of touch pad for detecting movements of multiple objects Download PDFInfo
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- CN100527060C CN100527060C CNB2006100021978A CN200610002197A CN100527060C CN 100527060 C CN100527060 C CN 100527060C CN B2006100021978 A CNB2006100021978 A CN B2006100021978A CN 200610002197 A CN200610002197 A CN 200610002197A CN 100527060 C CN100527060 C CN 100527060C
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Abstract
A method for detecting multi-object movement of touch control board includes detecting induction value of object on touch control board to obtain a induction valve waveform, identifying the first and the second peak tops of said waveform, judging that there are the first and the second objects on said board if both said peak tops are greater than a threshold, dividing said waveform to be two regions corresponding to the first and the second objects separately, judging that the first and the second objects are moved objects when induction valves of two said region are greater than the first and the second reference values.
Description
Technical field
The present invention relates to a kind of detection method of Trackpad, the detection method that particularly a kind of Trackpad multi-object moves.
Background technology
Trackpad is a kind of for the finger input media that slip is moved with the control cursor on level and smooth panel.Because the thickness of Trackpad is extremely thin, thus can design among ultra-thin mobile computer, keyboard, digital player or other device, and because it is not mechanical design, so very easy on safeguarding.
Fig. 1 is an existing two-dimensional Trackpad 100, and it comprises panel 102, Y-axis inductive layer 104, insulation course 106, X-axis inductive layer 108 and base plate 110.When finger 112 contact surface plates 102, the induction amount (electric capacity) of its touch position will produce change, and the control circuit that connects Trackpad 100 can be converted to the electric capacity on the Trackpad induction amount, as shown in Figure 2, and in order to position, the displacement of judging finger and the direction that moves.In existing technology, confirm that whether object touches Trackpad 100 is as the foundation of judging with detected induction amount size, as shown in Figure 3, when induction amount during greater than a reference value th, indicated object touching Trackpad 100, otherwise when induction amount during less than reference value th, indicated object leaves does not have object to exist on Trackpad 100 or the Trackpad 100.
Yet the gestures such as moving, touch, leave by detecting single object is with manipulative procedure or device, and in the utilization in the electronic product now have deficiency more, so biconjugate resembles or the demand of the detection of multi-object just produces thereupon.For example, the action of a plurality of objects on the Trackpad multiple different gesture of can arranging in pairs or groups out makes the input mode diversification.
The existing method of judging that multi-object touches in the prior art for example in No. the 5825352nd, the United States Patent (USP) case, judges that with the waveform that detects Trackpad induction amount object touches.Fig. 4 A to Fig. 4 D is the induction amount waveform of prior art along two reference directions detection Trackpad 001, and the X outboard profile 002 of Fig. 4 A to Fig. 4 D is represented the induction amount of Trackpad 001 along continuous straight runs, and Y outboard profile 003 is represented Trackpad 001 induction amount vertically.In the waveform of this X outboard profile 002 greater than the object of summit correspondence on Trackpad 001 of a reference value.For example if 021 of X outboard profile 002 single tool one summit this moment be an object 011 on the Trackpad 001, shown in Fig. 4 A; If have two summits 021 and 022, then be two objects 011 and 012 this moment on the Trackpad 001, shown in Fig. 4 B; If have three summits 021,022 and represented to have on the Trackpad 001 three objects 011,012,013 at 023 o'clock, shown in Fig. 4 C.By the sensed object number, can judge different gestures, for example ought detect has two objects to move on the Trackpad 001, may be defined as one first gesture, maybe ought detect two objects contacts Trackpad 001 and left within a certain period of time, may be defined as one second gesture or the like, increased the variation of gesture, make mode of operation simpler and easy or more polynary.
Yet the above practice also can't be judged the independent mobile behavior that two objects are above.For example, shown in Fig. 4 B, two objects 011 and 012 are arranged on the Trackpad 001, on the X outboard profile 002 two summits 021 and 022 are arranged at this moment, a summit 031 is arranged on the Y outboard profile 003.When first object 011 begins to move and second object 012 moves, shown in Fig. 4 D, X outboard profile 002 still has two summits 021 and 022, and 003 of Y outboard profile becomes two summits 031 and 032.But promptly the beginning so can't judge thus that still what object moves.
If can judge moving of individual objects, then can judge more gesture, increase the application of more Trackpad modes of operation.
Summary of the invention
The objective of the invention is to, a kind of multi-object detection method of Trackpad is provided, it can judge independently moving of multi-object.
The present invention also aims to, a kind of multi-object gesture detecting method of Trackpad is provided.
The invention provides the detection method that multi-object moves on a kind of Trackpad, comprise the following steps:
Induction amount during detected object contact Trackpad obtains an induction amount waveform;
One first summit of identification induction amount waveform and one second summit;
When described first summit and second summit during all greater than a critical value, then judging has one first object and one second object on the Trackpad;
Described induction amount waveform is divided into a first area and a second area, respectively corresponding described first object and second object;
Calculate the induction variable quantity of first area described in the described induction amount waveform and second area;
Respond to variable quantity greater than one first reference value when described first area, judge that then described first object moves; And
Respond to variable quantity greater than one second reference value when described second area, judge that then described second object moves.
The step of described identification induction amount waveform comprises: the lowest point of identification between described first summit and second summit.
The step of described division first area and second area also comprises:
Select one second critical value;
If the lowest point is less than or equal to second critical value, then induction amount waveform is exactly described first area and second area greater than two zones of second critical value; And
If the lowest point is greater than second critical value, is diacritical point or boundary line then with this lowest point, it is described first area and second area greater than the area dividing of second critical value that waveform is measured in induction.
The step of the induction variable quantity of described calculating induction amount waveform comprises: the induction amount on reference time detection Trackpad, and calculate this time detected induction amount and the last time variable quantity of detected induction amount.
Judge that the step that described first object moves comprises: if the induction amount on the first direction of first object increases, and the induction amount minimizing on the second direction opposite with first direction, represent the displacement of the oriented described first direction of first object.
Judge that the step that described second object moves comprises: if the induction amount on the first direction of second object increases, and the induction amount minimizing on the second direction opposite with first direction, represent the displacement of the oriented described first direction of second object.
Described induction variable quantity comprises the displacement of described first summit and second summit.
Described induction variable quantity comprises the barycenter displacement of described first area and second area.
The present invention also provides multi-object on a kind of Trackpad to move the detection method of gesture, it is characterized in that, comprises the following steps:
Detected object contact Trackpad;
On Trackpad, have one first object and one second object at least, judge that then first object moves and judge that second object moves; And
When wherein an object moves, send the digital signal that this moves the object correspondence.
The digital signal of described correspondence comprises the displacement of described mobile object through a reference time.
The digital signal of described correspondence comprises the absolute coordinates or the relative coordinate of described mobile object.
Described judgement first object moves and judges that the step that second object moves comprises the following steps:
Induction amount during detected object contact Trackpad obtains an induction amount waveform;
One first summit of the described induction amount of identification waveform and one second summit;
When first summit and second summit during all greater than a critical value, then judging has one first object and one second object on the Trackpad;
Described induction amount waveform is divided into a first area and a second area, respectively corresponding described first object and second object;
Calculate the induction variable quantity of first area and second area in the described induction amount waveform;
Respond to variable quantity greater than one first reference value when the first area, judge that then first object moves; And
Respond to variable quantity greater than one second reference value when second area, judge that then second object moves.
The step of described identification induction amount waveform comprises: the lowest point of identification between first summit and second summit.
The step of described division first area and second area also comprises:
Select one second critical value;
If the lowest point is less than or equal to second critical value, then induction amount waveform is described first area and second area greater than two zones of second critical value; And
If the lowest point is greater than second critical value, then is diacritical point or boundary line with the lowest point, it is first area and second area greater than the area dividing of second critical value that waveform is measured in induction.
The step of the induction variable quantity of described calculating induction amount waveform comprises: the induction amount on reference time detection Trackpad, and calculate this time detected induction amount and the last time variable quantity of detected induction amount.
Judge that the step that first object moves comprises: if the induction amount on the first direction of first object increases, and the induction amount minimizing on the second direction opposite with this first direction, represent the displacement of the oriented first direction of described first object.
Judge that the step that second object moves comprises: if the induction amount on the first direction of second object increases, and the induction amount minimizing on the second direction opposite with first direction, represent the displacement of the oriented first direction of described second object.
Described induction variable quantity comprises the displacement of described first summit and second summit.
Described induction variable quantity comprises the barycenter displacement of described first area and second area.
The present invention correctly judges the state of each object on this Trackpad by distinguishing individual objects in the induction quantitative changeization that produces on the Trackpad, and then detects the operation of various different gestures exactly.
Description of drawings
Fig. 1 is an existing two-dimensional Trackpad synoptic diagram;
Fig. 2 is the graph of a relation of induction amount and position on the Trackpad of Fig. 1;
Fig. 3 is a detected induction quantitative change synoptic diagram behind the finger touches Trackpad;
Fig. 4 A is that prior art detects an object induction amount oscillogram on the Trackpad along two reference directions;
Fig. 4 B is that prior art detects two subject-induced amount oscillograms on the Trackpad along two reference directions;
Fig. 4 C is that known technology detects three subject-induced amount oscillograms on the Trackpad along two reference directions;
Fig. 4 D is that prior art detects two subject-induced amount oscillograms on the Trackpad along two reference directions;
Fig. 5 is for detecting the induction amount oscillogram of two objects on the Trackpad;
Fig. 6 A is first area and second area synoptic diagram;
Fig. 6 B is first area and second area synoptic diagram;
Fig. 7 A is for calculating the variation synoptic diagram of induction amount waveform;
Fig. 7 B is the induction variable quantity synoptic diagram of Fig. 7 A;
Fig. 8 A is for calculating the variation synoptic diagram of induction amount waveform;
Fig. 8 B is the induction variable quantity synoptic diagram of Fig. 8 A;
Fig. 9 A is for calculating the variation synoptic diagram of induction amount waveform;
Fig. 9 B is the induction variable quantity synoptic diagram of Fig. 9 A;
Figure 10 A is for calculating the variation synoptic diagram of induction amount waveform;
Figure 10 B is the induction variable quantity synoptic diagram of Figure 10 A;
Figure 11 A is for calculating the first summit displacement diagram;
Figure 11 B is for calculating the second summit displacement diagram;
Figure 12 A last time changed synoptic diagram with the induction amount waveform barycenter of this detection;
Figure 12 B last time changed synoptic diagram with the induction amount waveform barycenter of this detection;
Figure 13 A is the first digital signal synoptic diagram that sends after first object moves;
Figure 13 B is the second digital signal synoptic diagram that sends after second object moves.
Embodiment
Detection method of the present invention does not need to rely on the improvement of hardware detecting circuit, just can judge touching, stop and moving of object, and can distinguish multiple gesture.
Judge the method that multi-object independently moves
Fig. 5 is one first object 120 when contacting Trackpad 001 with one second object 122, and induction amount oscillogram 004 shows the induction amount waveform that inductor scans.One first summit 125 of identification induction amount waveform and one second summit 130, if first summit 125 and second summit 130 be all greater than a critical value x, then judging has one first object 120 and one second object 122 on the Trackpad 001.Shown in Fig. 6 A or Fig. 6 B, waveform is measured in induction be divided into a first area 126 of corresponding first object 120 and a second area 131 of corresponding second object 122, in one embodiment, the lowest point 128 between identification first summit 125 and second summit 130 also, first area 126 is two zones of induction amount greater than one second critical value x2 with second area 131, as shown in Figure 6A; If the lowest point 128 greater than the second critical value x2, is diacritical point or boundary line with the lowest point 128 then, waveform is measured in induction be divided into first area 126 and second area 131, shown in Fig. 6 B.
The meaning diagrammatic sketch of pairing induction amount wave form varies when Fig. 7 A to Fig. 8 B moves for first object 120 of Fig. 5.In one embodiment, shown in Fig. 7 A, the induction amount on the Trackpad 001 of reference time detection Fig. 5, and calculate this time detected induction amount and last time the variable quantity dV of detected induction amount.Curve 140 and 150 is first area 126 and the last time detected induction amount of second area 131, and curve 142 and 152 is first area 126 and second area 131 these detected induction amounts.Fig. 7 B is the variable quantity dV of twice induction amount among Fig. 7 A.The absolute value of the induction variable quantity dV of first area 126 judges then that greater than one first reference value th1 first object 120 begins to move.Shown in Fig. 7 A and Fig. 7 B,, and reduce the displacement of first object, the 120 oriented first directions of presentation graphs 5 in a second direction opposite (for example the right) induction amount with first direction if a first direction (for example left side) the induction amount of first area 126 increases.Fig. 8 A and Fig. 8 B are that mode same as described above is judged moving of first object 120, and only sense of displacement is opposite.
The meaning diagrammatic sketch of pairing induction amount wave form varies when Fig. 9 A to Figure 10 B moves for second object 122 of Fig. 5, and with above-mentioned judgement first object 120 mobile phases with mode judge that second object 122 moves.When the absolute value of the induction variable quantity dV of second area 131 greater than one second reference value th2, judge that then second object 122 begins to move.When the induction amount increase of second area 131 first directions, and reduce the displacement of second object, the 122 oriented first directions of presentation graphs 5 in the induction amount of second direction.
In another embodiment, whether the judgement of the displacement of available summit or barycenter moves.Figure 11 A and Figure 11 B are the induction amount on the Trackpad 001 of reference time detection Fig. 5, and calculate the absolute value of the displacement d of first summit 125 and second summit 130, if the absolute value of the displacement d of first summit 125 is greater than the first reference value th1, judge that then first object 120 moves, shown in Figure 11 A; If the displacement d of second summit 130 is greater than the second reference value th2, then second object 122 of Pan Dinging moves, shown in Figure 11 B.Figure 12 A and Figure 12 B are the induction amount on the Trackpad 001 of reference time detection Fig. 5, and the absolute value of the displacement d of the barycenter 182 of the barycenter 180 of calculating first area 126 and second area 131.Barycenter is the barycenter of object distribution in Trackpad induction amount always, and is close with the summit position usually, but not necessarily just at summit.If the absolute value of the displacement d of barycenter 180 judges that then first object 120 moves, shown in Figure 12 A greater than the first reference value th1; If the displacement d of barycenter 182 is greater than the second reference value th2, then second object 122 of Pan Dinging moves, shown in Figure 12 B.
According to said method,, all be judged to be object and begin to move no matter displacement to the left or to the right.Can according to its application demand send coherent signal, as the positional information of object etc. thereafter.
Multi-object moves the detection method of gesture
Figure 13 A and Figure 13 B show one first digital signal 202 and second digital signal 204.At first detect the induction amount of Trackpad,, use aforementioned " judging the method that the multi-object independently moves " section of declaring object whether to move if detected two objects contact Trackpad.As shown in FIG. 13A, begin mobile first digital signal 202 of then sending if be judged as first object 120.Shown in Figure 13 B, begin mobile second digital signal 204 of then sending if be judged as second object 122.Wherein first digital signal 202 and second digital signal 204 can comprise its corresponding objects through the displacement of a reference time, or the information such as variable quantity of absolute coordinates or relative coordinate, induction amount.
The foregoing description only is used to illustrate the present invention, but not is used to limit the present invention.
Claims (18)
1. the detection method that multi-object moves on the Trackpad is characterized in that, comprises the following steps:
Induction amount during detected object contact Trackpad obtains an induction amount waveform;
One first summit of identification induction amount waveform and one second summit;
When described first summit and second summit during all greater than a critical value, then judging has one first object and one second object on the Trackpad;
Described induction amount waveform is divided into a first area and a second area, respectively corresponding described first object and second object;
Calculate the induction variable quantity of first area described in the described induction amount waveform and second area;
Respond to variable quantity greater than one first reference value when described first area, judge that then described first object moves; And
Respond to variable quantity greater than one second reference value when described second area, judge that then described second object moves.
2. the detection method that multi-object moves on the Trackpad as claimed in claim 1 is characterized in that, the step of described identification induction amount waveform comprises: the lowest point of identification between described first summit and second summit.
3. the detection method that multi-object moves on the Trackpad as claimed in claim 2 is characterized in that, the step of described division first area and second area also comprises:
Select one second critical value;
If the lowest point is less than or equal to second critical value, then induction amount waveform is exactly described first area and second area greater than two zones of second critical value; And
If the lowest point is greater than second critical value, is diacritical point or boundary line then with this lowest point, it is described first area and second area greater than the area dividing of second critical value that waveform is measured in induction.
4. the detection method that multi-object moves on the Trackpad as claimed in claim 1, it is characterized in that, the step of the induction variable quantity of described calculating induction amount waveform comprises: the induction amount on reference time detection Trackpad, and calculate this time detected induction amount and the last time variable quantity of detected induction amount.
5. the detection method that multi-object moves on the Trackpad as claimed in claim 1, it is characterized in that, judge that the step that described first object moves comprises: if the induction amount on the first direction of first object increases, and the induction amount on the second direction opposite with first direction reduces, and represents the displacement of the oriented described first direction of first object.
6. the detection method that multi-object moves on the Trackpad as claimed in claim 1, it is characterized in that, judge that the step that described second object moves comprises: if the induction amount on the first direction of second object increases, and the induction amount on the second direction opposite with first direction reduces, and represents the displacement of the oriented described first direction of second object.
7. the detection method that multi-object moves on the Trackpad as claimed in claim 1 is characterized in that, described induction variable quantity comprises the displacement of described first summit and second summit.
8. the detection method that multi-object moves on the Trackpad as claimed in claim 1 is characterized in that, described induction variable quantity comprises the barycenter displacement of described first area and second area.
9. multi-object moves the detection method of gesture on the Trackpad, it is characterized in that, comprises the following steps:
Detected object contact Trackpad;
On Trackpad, have one first object and one second object at least, judge that then first object moves and judge that second object moves; And
When wherein an object moves, send the digital signal that this moves the object correspondence;
Wherein, described judgement first object moves and judges that the step that second object moves comprises the following steps:
Induction amount during detected object contact Trackpad obtains an induction amount waveform;
One first summit of the described induction amount of identification waveform and one second summit;
When first summit and second summit during all greater than a critical value, then judging has one first object and one second object on the Trackpad;
Described induction amount waveform is divided into a first area and a second area, respectively corresponding described first object and second object;
Calculate the induction variable quantity of first area and second area in the described induction amount waveform;
Respond to variable quantity greater than one first reference value when the first area, judge that then first object moves; And
Respond to variable quantity greater than one second reference value when second area, judge that then second object moves.
10. multi-object moves the detection method of gesture on the Trackpad as claimed in claim 9, it is characterized in that, the digital signal of described correspondence comprises the displacement of described mobile object through a reference time.
11. multi-object moves the detection method of gesture on the Trackpad as claimed in claim 9, it is characterized in that, the digital signal of described correspondence comprises the absolute coordinates or the relative coordinate of described mobile object.
12. multi-object moves the detection method of gesture on the Trackpad as claimed in claim 9, it is characterized in that, the step of described identification induction amount waveform comprises: the lowest point of identification between first summit and second summit.
13. multi-object moves the detection method of gesture on the Trackpad as claimed in claim 12, it is characterized in that, the step of described division first area and second area also comprises:
Select one second critical value;
If the lowest point is less than or equal to second critical value, then induction amount waveform is described first area and second area greater than two zones of second critical value; And
If the lowest point is greater than second critical value, then is diacritical point or boundary line with the lowest point, it is first area and second area greater than the area dividing of second critical value that waveform is measured in induction.
14. multi-object moves the detection method of gesture on the Trackpad as claimed in claim 9, it is characterized in that, the step of the induction variable quantity of described calculating induction amount waveform comprises: the induction amount on reference time detection Trackpad, and calculate this time detected induction amount and the last time variable quantity of detected induction amount.
15. multi-object moves the detection method of gesture on the Trackpad as claimed in claim 9, it is characterized in that, judge that the step that first object moves comprises: if the induction amount on the first direction of first object increases, and the induction amount on the second direction opposite with this first direction reduces, and represents the displacement of the oriented first direction of described first object.
16. multi-object moves the detection method of gesture on the Trackpad as claimed in claim 9, it is characterized in that, judge that the step that second object moves comprises: if the induction amount on the first direction of second object increases, and the induction amount on the second direction opposite with first direction reduces, and represents the displacement of the oriented first direction of described second object.
17. multi-object moves the detection method of gesture on the Trackpad as claimed in claim 9, it is characterized in that, described induction variable quantity comprises the displacement of described first summit and second summit.
18. multi-object moves the detection method of gesture on the Trackpad as claimed in claim 9, it is characterized in that, described induction variable quantity comprises the barycenter displacement of described first area and second area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100021978A CN100527060C (en) | 2006-01-18 | 2006-01-18 | Method of touch pad for detecting movements of multiple objects |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100021978A CN100527060C (en) | 2006-01-18 | 2006-01-18 | Method of touch pad for detecting movements of multiple objects |
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| CN101004651A CN101004651A (en) | 2007-07-25 |
| CN100527060C true CN100527060C (en) | 2009-08-12 |
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| CNB2006100021978A Expired - Fee Related CN100527060C (en) | 2006-01-18 | 2006-01-18 | Method of touch pad for detecting movements of multiple objects |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI368161B (en) * | 2007-12-21 | 2012-07-11 | Htc Corp | Electronic apparatus and input interface thereof |
| US8194051B2 (en) * | 2009-12-15 | 2012-06-05 | Silicon Integrated Systems Corp. | Multiple fingers touch sensing method using matching algorithm |
| TWI475440B (en) * | 2012-09-10 | 2015-03-01 | Elan Microelectronics Corp | Touch device and gesture identifying method thereof |
| CN104850264B (en) * | 2015-05-29 | 2017-09-29 | 北京拉酷网络科技有限公司 | The detection control method and system of diversified gesture operation on a kind of Trackpad |
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