CN101673156A - Gesture detection method of touch pad - Google Patents
Gesture detection method of touch pad Download PDFInfo
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- CN101673156A CN101673156A CN200910182006A CN200910182006A CN101673156A CN 101673156 A CN101673156 A CN 101673156A CN 200910182006 A CN200910182006 A CN 200910182006A CN 200910182006 A CN200910182006 A CN 200910182006A CN 101673156 A CN101673156 A CN 101673156A
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Abstract
The invention relates to a gesture detection method of a touch pad. The method comprises the following steps: confirming that an object touches the touch pad; judging whether the object moves on the touch pad; if not, confirming that the object departs from the touch pad; sending out a first gesture signal; carrying out non-sampling point count by a counter since the object departs from the touchpad; and sending out a second gesture signal if the number of the non-sampling points is larger than that of a reference point. The invention utilizes the magnitude and variation of the sampling values to confirm the various gestures on the touch pad, thus avoiding fault judgment due to noise interference, improving the defect that the touch pad cannot be identified due to various maloperation, and enhancing use convenience.
Description
Technical field
The present invention relates to a kind of detection method of Trackpad, refer in particular to a kind of method of gestures detection of Trackpad.
Background technology
Trackpad is a kind of for point the input media that slides and move with the control cursor on level and smooth panel, because its area is little, volume is light, has been widely used on the electronic equipments such as personal digital assistant (PDA), mobile phone, palm PC, flat computer.
Existing Trackpad gesture mainly contains to be clicked, double-click, pulls etc.At present, the gestures detection recognition methods of Trackpad roughly has two classes, one class mainly is to determine by the size of the capacitive sensing amount that detects Trackpad whether the touching object contacts or leave Trackpad, to produce corresponding sequential combination, thereby realize different gesture operations, but really be difficult to satisfy the requirements at the higher level of effective and degree of accuracy, because electric capacity is easy to be subjected to external environment (humidity, temperature, radio) interference, in order to address the above problem, some improving technologies have appearred, one class such as Chinese patent application number are the patent of CN 200510077572, and it is to utilize to set up electric capacity threshold values and variation tendency to reduce this external interference, perhaps judges the validity of touching and gesture according to the threshold values of pressure; The another kind of foundation of passing through the accumulation of detection induction amount as judgement, when the accumulation of induction amount during greater than a systemic presupposition critical value, expression has object touching Trackpad, otherwise, when induction amount during less than this systemic presupposition critical value, the expression object leaves does not have object to exist on Trackpad or the Trackpad.
Above-mentioned these two class methods all are subject to the interference of outside noise and the judgement that leads to errors, and can not fundamentally overcome in traditional Trackpad gesture identification method and only to rely on the change that detects capacitance whether to judge the drawback of touch-control, so need a kind of anti-interference and Trackpad gesture identification method that degree of accuracy is high badly.
Therefore need can prevent noise and the detection method of being convenient to operate for users provide a kind of.
Summary of the invention
The actual technical matters to be solved of the present invention is how a kind of gesture detecting method on Trackpad of avoiding noise is provided, to achieve these goals, this gesture detecting method on Trackpad of the present invention may further comprise the steps: confirm that an object touches described Trackpad; Judge whether described object moves on described Trackpad; If described object does not move, confirm that then described object leaves described Trackpad on Trackpad; Send first hand signal; Counter leaves contact panel from described object and begins not have the sampled point counting; And if no sampling number during greater than a reference point numerical value, is then sent one second hand signal.
The present invention also provide a kind of on Trackpad the method for gestures detection, may further comprise the steps: confirm that an object touches described Trackpad for the first time; Judge whether described object moves on described Trackpad; If described object does not move, confirm that then described object leaves described Trackpad for the first time on Trackpad; Send one first hand signal; Counter leaves contact panel from the described first time and begins not have the sampled point counting; And, no sampling number touches described Trackpad for the second time if during less than described reference point numerical value, then confirming described object; Judge whether described object moves on described Trackpad; If described object does not move, confirm that then described object leaves described Trackpad for the second time on described Trackpad; Send one second hand signal, to finish described first hand signal; Send one the 3rd hand signal; And send one the 4th hand signal, to finish the 3rd hand signal.
Thereby of the present inventionly utilize the size of sampled value and variation to confirm various gestures on Trackpad, produce erroneous judgement, more improved various maloperations and caused the shortcoming that Trackpad can't identification, also increased the convenience that uses except avoiding noise.
Description of drawings
Fig. 1 is the oscillogram that scanning detected sampled point when object touching Trackpad was not arranged;
Fig. 2 is the oscillogram that scanning detects sampled point when object touching Trackpad;
Fig. 3 is that object is moved to the left the oscillogram that time scanning detects sampled point on Trackpad;
Fig. 4 shows a detection signal and an output signal;
Fig. 5 shows another detection signal and an output signal;
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples, and inspection method of the present invention does not need to rely on the improvement of hardware detecting circuit, just can improve the resistivity of noise, and can distinguish multiple gesture.
Confirm the detection method of object touching:
When being illustrated in figure 1 as without any object touching Trackpad, scan the oscillogram of detected sampled point, when the electronic installation that is equiped with Trackpad, after powering on as computing machine, at first, whether contact panel scanning, detection have touch object touching Trackpad, because the time without any object touching Trackpad, after Trackpad powers on, the size that scans detected sampled point is almost a steady state value, and wherein, sampled point is to determine according to sampling time and sample frequency, if do not undergo mutation as detected sampled value, then any action can not done by system; As detect that sampled value is undergone mutation and surpass a preset critical, as shown in Figure 2, sampled value is existing significant variation of steady state value before the touch-control more not, and then expression has detected the touching object, has confirmed the generation of touch-control action.
Confirm the detection method that object leaves:
When touch object is left contact panel, the sampled value of the sample circuit steady state value before touch-control that suddenlys change, as shown in Figure 1, the value of sampled value after the steady state value before touch-control not that suddenly change back again originally than touch-control, and there is not obvious variation with steady state value before the touch-control not, promptly still less than preset critical, then expression has detected leaving of touch object, confirms the touch-control release.
Confirm the detection method of movement of objects:
Moving of object must be through confirming, otherwise noise or object have slight shake, might cause the erroneous judgement of object position, thereby cause cursor to produce misoperation, the variation of sampled value when touch object shown in Figure 3 is moved to the left, when needs confirm that object is whether mobile, at first determine to meet " detection method of confirming the object touching ", by sample circuit the touching object is sampled then, because when touch object has moved a segment distance as finger on contact panel, along with moving of touch object, can form the sampled point of series of displacement track, when the deviate of any adjacent two sampled points of sample circuit elder generation post-sampling surpasses a specific deviation range, confirm the generation of shift action, this moment, the ABCD dotted line waveform figure when touching contact panel was changed to the solid line waveform figure of A1B1C1D1; Moreover because arbitrarily adjacent two sampled points all can constitute a vector, like this, the direction that moves is identical with current direction that should vector, and mobile speed is directly proportional with current mould that should vector.
Click the detection method of gesture:
Please refer to and Figure 4 shows that a detection signal 10 and output signal 11, output signal 11 comprises hand signal 111 and 112, output signal 10 transfers high levle to by low level, after determining to meet " detection method of confirming the object touching ", judge according to " confirming the detection method of movement of objects " whether described object moves on described Trackpad, if described object has mobile on this Trackpad, then be judged to be mobile gesture, if described object is not judged to be mobile gesture on this Trackpad, then detect described object again and leave this Trackpad, detection signal 10 transfers low level to by high levle, when determining to meet " confirming the detection method that object leaves ", send hand signal 111 (for example button is being pressed signal), this hour counter leaves contact panel from touch object and begins not have the sampled point counting, if no sampling number during greater than a reference point numerical value of N, is then sent hand signal 112 (for example button relieving signal).
Double-click the detection method of gesture:
Fig. 4 shows a detection signal 12 and an output signal 13, and output signal 13 comprises hand signal 131,132,133 and 134.When detecting an object and touch Trackpad for the first time, detection signal 12 transfers high levle to by low level, after determining to meet " detection method of confirming the object touching ", judge according to " confirming the detection method of movement of objects " whether described object moves on described Trackpad, if it is mobile that described object has, then be judged to be mobile gesture on this Trackpad; If described object is not judged to be mobile gesture on this Trackpad, then leave described Trackpad for the first time detecting described object, detection signal 12 transfers accurate position, ground to by high levle, when determining to meet " confirming the detection method that object leaves ", send hand signal 131 (for example button is being pressed signal), this hour counter leaves contact panel from touch object and begins not have the sampled point counting, if the sampling number of record is less than this reference point numerical value of N, and detect object again and touch this Trackpad for the second time, detection signal 12 changes high levle into by low level once more, after determining to meet " detection method of confirming the object touching ", judge according to " confirming the detection method of movement of objects " whether described object moves on described Trackpad, if described object does not move on Trackpad, then leave described Trackpad for the second time detecting described object, detection signal 12 transfers low level to by high levle, and after determining to meet " confirming the detection method that object leaves ", send hand signal 132 (for example button relieving signal) and finished hand signal 131, send hand signal 133 (for example button is being pressed signal) subsequently, send hand signal 134 (for example button relieving signal) then, to finish hand signal 133.
In each above-mentioned embodiment, whether mobilely on Trackpad utilize the size of sampled value and pass through judgment object, be used for confirming various gestures on Trackpad, noise produces erroneous judgement except can be avoided, more improved because clear and definite inadequately in operational action, cause the shortcoming that Trackpad can't identification, also increased the convenience that uses.
Claims (13)
1. the method for a gestures detection on Trackpad, it may further comprise the steps:
Confirm that an object touches described Trackpad;
Judge whether described object moves on described Trackpad;
If described object does not move, confirm that then described object leaves described Trackpad on Trackpad;
Send first hand signal;
Counter leaves contact panel from described object and begins not have the sampled point counting; And
If no sampling number during greater than a reference point numerical value, is then sent one second hand signal.
2. as claimed in claim 1 a kind of on Trackpad the method for gestures detection, it is characterized in that: described affirmation object is touched described Trackpad and be may further comprise the steps:
Write down the sampled value of the detected sampled point of scanning on the described Trackpad; And
As detect that sampled value is undergone mutation and surpass a preset critical;
Represent that then described object touches described Trackpad.
3. as claimed in claim 1 a kind of on Trackpad the method for gestures detection, it is characterized in that: describedly judge whether described object moves may further comprise the steps on described Trackpad:
Confirm that described object touches described Trackpad;
By sample circuit this object is sampled;
When the deviate of any adjacent two sampled points of sample circuit elder generation post-sampling above a specific deviation range;
Confirm that then object moves on Trackpad.
4. as claimed in claim 3 a kind of on Trackpad the method for gestures detection, it is characterized in that: wherein adjacent two sampled points all can constitute a vector arbitrarily, the direction that moves is identical with current direction that should vector, and mobile speed is directly proportional with current mould that should vector.
5. as claimed in claim 1 a kind of on Trackpad the method for gestures detection, it is characterized in that: described affirmation object leaves described Trackpad and may further comprise the steps:
Write down the sampled value of the detected sampled point of scanning on the described Trackpad; And
As detect suddenly change back again steady state value before the touch-control not of sampled value, and less than preset critical;
Represent that then described object leaves described Trackpad.
6. as claimed in claim 1 a kind of on Trackpad the method for gestures detection, it is characterized in that: the first gesture signal packet is drawn together button and is being pressed signal.
7. as claimed in claim 1 a kind of on Trackpad the method for gestures detection, it is characterized in that: the second gesture signal packet is drawn together button and is decontroled signal.
8. the method for a gestures detection on Trackpad, it may further comprise the steps:
Confirm that an object touches described Trackpad for the first time;
Judge whether described object moves on described Trackpad;
If described object does not move, confirm that then described object leaves described Trackpad for the first time on Trackpad;
Send one first hand signal;
Counter leaves contact panel from the described first time and begins not have the sampled point counting; And
If no sampling number during less than described reference point numerical value, is then confirmed described object and is touched described Trackpad for the second time;
Judge whether described object moves on described Trackpad;
If described object does not move, confirm that then described object leaves described Trackpad for the second time on described Trackpad;
Send one second hand signal, to finish described first hand signal;
Send one the 3rd hand signal; And
Send one the 4th hand signal, to finish the 3rd hand signal.
9. the method for a kind of shown in claim 8 gestures detection on Trackpad is characterized in that: confirm that object is for the first time and touch described Trackpad for the second time and may further comprise the steps:
Write down the sampled value of the detected sampled point of scanning on the described Trackpad; And
As detect that sampled value is undergone mutation and surpass a preset critical;
Represent that then described object touches described Trackpad.
10. the method for a kind of shown in claim 8 gestures detection on Trackpad, it is characterized in that: whether judgment object moves on described Trackpad may further comprise the steps:
Confirm that described object touches described Trackpad;
By sample circuit this object is sampled;
When the deviate of any adjacent two sampled points of sample circuit elder generation post-sampling above a specific deviation range;
Confirm that then object moves on Trackpad.
11. the method for a kind of shown in claim 8 gestures detection on Trackpad is characterized in that: confirm that object is for the first time and leave described Trackpad for the second time and may further comprise the steps:
Write down the sampled value of the detected sampled point of scanning on the described Trackpad; And
As detect suddenly change back again steady state value before the touch-control not of sampled value, and less than preset critical;
Represent that then described object leaves described Trackpad.
12. the method for a kind of shown in claim 8 gestures detection on Trackpad is characterized in that: the described first and the 3rd hand signal comprises that button pressing signal.
13. the method for a kind of shown in claim 8 gestures detection on Trackpad is characterized in that: the described second and the 4th hand signal comprises that button decontrols signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910182006A CN101673156A (en) | 2009-07-16 | 2009-07-16 | Gesture detection method of touch pad |
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| CN200910182006A CN101673156A (en) | 2009-07-16 | 2009-07-16 | Gesture detection method of touch pad |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102859473A (en) * | 2010-05-21 | 2013-01-02 | 日本电气株式会社 | Instructed position determination device of touch panel, touch panel device, electronic apparatus provided with same, instructed position determination method of touch panel and computer program storage medium |
| CN103593132A (en) * | 2012-08-16 | 2014-02-19 | 腾讯科技（深圳）有限公司 | Touch device and gesture recognition method |
-
2009
- 2009-07-16 CN CN200910182006A patent/CN101673156A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102859473A (en) * | 2010-05-21 | 2013-01-02 | 日本电气株式会社 | Instructed position determination device of touch panel, touch panel device, electronic apparatus provided with same, instructed position determination method of touch panel and computer program storage medium |
| CN102859473B (en) * | 2010-05-21 | 2015-12-02 | 联想创新有限公司（香港) | Point to location determining device and method, touch panel device, electronic equipment |
| CN103593132A (en) * | 2012-08-16 | 2014-02-19 | 腾讯科技（深圳）有限公司 | Touch device and gesture recognition method |
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Open date: 20100317 |