CN101727242A - Method for sensing multiclutch on touch panel - Google Patents
Method for sensing multiclutch on touch panel Download PDFInfo
- Publication number
- CN101727242A CN101727242A CN200910264985A CN200910264985A CN101727242A CN 101727242 A CN101727242 A CN 101727242A CN 200910264985 A CN200910264985 A CN 200910264985A CN 200910264985 A CN200910264985 A CN 200910264985A CN 101727242 A CN101727242 A CN 101727242A
- Authority
- CN
- China
- Prior art keywords
- influence value
- value
- sweep trace
- maximum
- minimum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Position Input By Displaying (AREA)
Abstract
The invention relates to a method which can effectively avoid noise interference, i.e. strong interference resistance, and can recognize multiclutch on a touch panel. A specific position of touching the touch panel by an object to be touched is judged by using an inductive capacitance difference measuring method. The method is simple and convenient, has stronger interference resistance because of introducing the capacitance difference mode, and avoids the interference caused by various noises, thereby ensuring the accuracy of sensing multiclutch on the touch panel.
Description
Technical field
The present invention relates to a kind of method of on Trackpad, detecting touch-control, refer in particular to the method for sensing multi-finger touch-control.
Background technology
Because the multimedia system development trend is gradually improved recently, the function that is possessed is also more and more, relative operation-interface also becomes increasingly complex, and additional more function just need be provided with more associative operation button, but under the more little exquisite more demand of system requirements, these buttons also can not all be set up in system, so the application of touch technology just can be saved the needed space of majority operation button now.
So-called Trackpad is meant 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, because Trackpad has frivolous advantage, so present stage is applied on the electronic installations such as mobile computer, personal digital assistant, digital player in a large number.
And at present traditional Trackpad can only detect single finger striking, the operation of finger instruction such as move, leave, still there is inconvenience in use in the user, therefore, how can provide a kind of and realize that the methods of operating of touch-control that refer to just need to be resolved hurrily more more.The existing U.S. has announced that a related realization refers to the patent of touch-control more, its application number is US5825352, this patent has just disclosed the touching method that a kind of oscillogram of utilizing detecting Trackpad induction amount is differentiated finger, and its crest, trough value of mainly having utilized the method for default maximum, minimum threshold value to judge that finger induction amount forms waveform compares and determined whether many finger touches.Though this patent method therefor has successfully detected many finger touchings, but in said method,, just cause erroneous judgement easily if when noise surpasses maximum threshold value, promptly interference of noise has been thought by mistake the finger touches Trackpad, so just caused unnecessary maloperation.
Therefore need solve above problem for users provide a kind of easier method.
Summary of the invention
The actual technical matters to be solved of the present invention is that how a kind of noise of can effectively avoiding is provided is the method that antijamming capability can be discerned many finger touch-controls on the Trackpad by force again.
In order to realize above-mentioned purpose of the present invention, the invention provides a kind of method at sensing multiclutch on touch panel, this Trackpad comprises plural sweep trace, it may further comprise the steps: (a) scan this sweep trace; (b) check the data that produced on each sweep trace, judge that the maximum influence value that whether has produced on each sweep trace greater than default PTHR has produced the minimum influence value less than the preset negative threshold value simultaneously again; If (c) continue to check whether pass through zero influence value between above-mentioned any adjacent maximum, the minimum influence value; If, (d) then this to pass through a little be exactly the position of finger touches, and the sweep trace group of passing through zero influence value is to number that should finger touches point.
Method at sensing multiclutch on touch panel of the present invention, not only easy, and owing to introduced the mode of differential capacitance, so antijamming capability is stronger, the interference of effectively having avoided various noises to cause, thus the accuracy of sensing multi-finger on Trackpad guaranteed.
Description of drawings
The variation diagram of induction amount when Fig. 1 is a contact panel without any input;
Fig. 2 is the conversion figure that induction amount behind the object contact surface plate is arranged;
Fig. 3 is the variation diagram that induction amount behind the two finger touches panels is arranged according to the present invention;
Fig. 4 is the principle of work process flow diagram of multi-finger touch method of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
See also shown in Figure 1ly, Trackpad can be preferably condenser type, and it comprises some sweep traces, after Trackpad powered on, sweep trace began scanning, without any the input media contact surface plate time, the variation of whole touch panel capacitance is tending towards a steady state value, and can set this steady state value is zero.
The present invention adopts the method for common inductance capacitance difference measurement, so-called difference measurement is meant: after contact panel powers on, sweep trace begins scanning, without any the input media contact surface plate time, the variation of whole touch panel capacitance is tending towards a steady state value, and this steady state value is zero influence value under perfect condition.See also shown in Figure 2, when any input equipment such as this panel of finger touches, this capacitance will change, after scanning for the first time, when scanning for the second time, two capacitances of same position have just formed a difference again, and so just having formed is just having, having negative capacitance, promptly finally formed and had minimum and maximum capacitance, thereby can finally judge the position of finger.
From the above, because when any input equipment such as this panel of finger touches, capacitance on the sweep trace will change, so need to detect earlier the data that produced on each sweep trace, because the capacitance of the sweep trace of finger touches to this panel all can change, so need to detect the data of described vicissitudinous sweep trace, find out the maximum in the data, the minimum influence value of producing on the described sweep trace respectively, do further to judge and handle according to the maximum that is obtained, minimum influence value then.With two these panels of finger touches is example, please refer to shown in Figure 3, owing on several sweep traces on this Trackpad, all detected data, and maximum influence value M has appearred, as peak value M1 and M2 and minimum influence value N, as peak value N1 and N2, wherein, maximum influence value M be on the occasion of, minimum influence value N is a negative value.Judge then that then the maximum influence value M that produced on this vicissitudinous sweep trace is whether greater than the positive threshold influence value M0 of system's preset in advance, whether the minimum influence value N that is produced is less than the negative threshold influence value N0 of system's preset in advance, judge that promptly whether M1 is greater than positive threshold influence value M0, whether N1 is less than negative threshold influence value N0 simultaneously, if satisfy above-mentioned two conditions, then continue again to check whether pass through zero influence value between above-mentioned maximum, minimum influence value M1, the N1; In like manner, whether also will judge M2 greater than positive threshold influence value M0, whether N2, then continues to check whether pass through zero influence value between above-mentioned two maximums, minimum influence value M2, the N2 if also satisfy above-mentioned two conditions less than negative threshold influence value N0 more simultaneously; If passed through zero influence value between adjacent arbitrarily maximum, minimum influence value M, the N, then showing has finger touches, and the point that passes through zero influence value is exactly the touch points position, as can be seen from Figure 3, having only influence value is to have satisfied the condition of passing through zero influence value between the maximum of M1 and N1 and M2 and N2, the minimum influence value, illustrate that then there is finger touches these two positions, and this position of passing through zero influence value promptly is the position of the described Trackpad of two finger touches.
In above-mentioned Fig. 3, passing through by maximum influence value M between described maximum influence value M and the minimum influence value N passed through behind zero influence value to minimum influence value N, promptly this direction of passing through is from high to low, but, so also just can realize passing through direction from low to high if the direction of the sweep trace shown in Fig. 3 is changed.Simultaneously, both can be set to solid-state form for the default positive and negative threshold influence value of mentioning in the said method and also can be arranged to dynamic-form, so long as in order to guarantee that threshold value adjusts to a suitable data.
See also shown in Figure 4, be workflow diagram of the present invention, if detect maximum influence value M greater than default positive threshold influence value M0, and minimum influence value really is not less than preset negative threshold influence value N0, though perhaps maximum influence value M is not more than default positive threshold influence value M0, but minimum influence value satisfies less than preset negative threshold influence value N0, that summarizes says, be exactly not satisfy maximum influence value M simultaneously greater than presetting positive threshold influence value and minimum influence value N condition less than preset negative threshold influence value, system will think does not so have finger touches, continues the step that scans then automatically.If judge maximum influence value M and minimum influence value N has satisfied above-mentioned two conditions, then just can enter next the detection whether the step of passing through is arranged, if do not pass through zero influence value between adjacent maximum, the minimum influence value, then system also can think does not have finger touches, continues the step that scans then automatically.
To said method, if when having only this panel of finger touches, then the data that the sweep trace on should panel is obtained can change, detect the maximum influence value M and the minimum influence value N of this sweep trace, and the maximum influence value M that judges is greater than default positive influence value M0, minimum influence value N is less than preset negative influence value N0 simultaneously, continue then to check that this maximum influence value M0 and minimum influence value N0 have passed through the influence value at zero point, so just show and just have only this panel of finger touches, and to pass through a little be exactly the position of finger touches panel.
In like manner, to touching greater than two fingers, fortune uses the same method and also can check the position that has more the finger touches panel, so not tired stating one by one, it is as long as correspondence satisfies maximum influence value greater than default positive threshold influence value, minimum influence value is less than the condition of preset negative threshold influence value simultaneously, and have the position of passing through zero influence value to think that all the position of finger touches panel is arranged between the adjacent maximum, minimum influence value, and pass through the number of the sweep trace group of influence value at zero point corresponding to this finger touches point.
The present invention is owing to utilized the variation of differential capacitance detecting induction amount, so antijamming capability is stronger, for general noise, the influence value of difference form can effectively prevent the interference that noise causes, and method is very simple.
Claims (10)
1. method at sensing multiclutch on touch panel, this Trackpad comprises plural sweep trace, it is characterized in that said method comprising the steps of:
(a) scan this sweep trace;
(b) check the data that produced on each sweep trace, judge that the maximum influence value that whether has produced on each sweep trace greater than default PTHR has produced the minimum influence value less than the preset negative threshold value simultaneously again; If,
(c) continue to check whether pass through zero influence value between above-mentioned any adjacent maximum, the minimum influence value; If,
(d) then this to pass through a little be exactly the position of finger touches, and the sweep trace group of passing through zero influence value is to number that should finger touches point.
2. the method for claim 1, it is characterized in that: the default positive and negative threshold value in described (b) step can be solid-state or dynamic threshold value.
3. the method for claim 1 is characterized in that: can set in described (b) step influence value on the occasion of and negative value.
4. the method for claim 1, it is characterized in that: in described (b) step, if only be checked through and a maximum influence value arranged on the sweep trace greater than default PTHR, a minimum influence value is arranged simultaneously less than the preset negative threshold value, if after continuing again to satisfy (c) step, then show and have only a described Trackpad of finger touches.
5. the method for claim 1 is characterized in that: in described (b) step, if in the data that each sweep trace produced, maximum influence value is greater than default PTHR, but minimum influence value is not less than the preset negative threshold value, then returns step (a).
6. the method for claim 1 is characterized in that: in described (b) step, if in the data that each sweep trace produced, maximum influence value is not more than default PTHR, but minimum influence value then returns step (a) really less than the preset negative threshold value.
7. the method shown in claim 1 is characterized in that: the influence value of the zero influence value in described (c) step for without any the object contact surface plate time.
8. the method for claim 1 is characterized in that: in described (c) step, if between the described adjacent maximum, minimum influence value without any passing through zero influence value, then return step (a).
9. as claim 1 or 8 described methods, it is characterized in that: passing through in described (c) step is meant directive passing through.
10. method as claimed in claim 9 is characterized in that: described pass through can be by just induction amount to negative induction amount pass through or by negative induction amount passing through to just induction amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102649858A CN101727242B (en) | 2009-12-21 | 2009-12-21 | Method for sensing multiclutch on touch panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102649858A CN101727242B (en) | 2009-12-21 | 2009-12-21 | Method for sensing multiclutch on touch panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101727242A true CN101727242A (en) | 2010-06-09 |
| CN101727242B CN101727242B (en) | 2012-05-30 |
Family
ID=42448198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102649858A Active CN101727242B (en) | 2009-12-21 | 2009-12-21 | Method for sensing multiclutch on touch panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101727242B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102236491A (en) * | 2011-07-22 | 2011-11-09 | 苏州瀚瑞微电子有限公司 | Scan configuration method and positioning method for capacitive sensor |
| CN102253780A (en) * | 2011-07-22 | 2011-11-23 | 苏州瀚瑞微电子有限公司 | Method for positioning two-dimensional capacitance sensor |
| CN102253751A (en) * | 2011-07-22 | 2011-11-23 | 苏州瀚瑞微电子有限公司 | Wiring structure and positioning method of single-layer ITO (Indium Tin Oxide) |
| CN102306072A (en) * | 2011-07-22 | 2012-01-04 | 苏州瀚瑞微电子有限公司 | Positioning method of two-dimensional capacitance sensor |
| CN102436318A (en) * | 2010-09-29 | 2012-05-02 | 比亚迪股份有限公司 | Method and device for recognizing number of objects |
| CN102736838A (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 |
| CN103941927A (en) * | 2013-01-22 | 2014-07-23 | 华为终端有限公司 | Touch signal detecting circuit and method and touch equipment |
| CN107092381A (en) * | 2010-12-30 | 2017-08-25 | 禾瑞亚科技股份有限公司 | Capacitive touch screen and method for detecting |
-
2009
- 2009-12-21 CN CN2009102649858A patent/CN101727242B/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102436318A (en) * | 2010-09-29 | 2012-05-02 | 比亚迪股份有限公司 | Method and device for recognizing number of objects |
| CN107092381B (en) * | 2010-12-30 | 2020-07-03 | 禾瑞亚科技股份有限公司 | Capacitive touch screen and detection method |
| CN107092381A (en) * | 2010-12-30 | 2017-08-25 | 禾瑞亚科技股份有限公司 | Capacitive touch screen and method for detecting |
| CN102736838A (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 |
| CN102253751A (en) * | 2011-07-22 | 2011-11-23 | 苏州瀚瑞微电子有限公司 | Wiring structure and positioning method of single-layer ITO (Indium Tin Oxide) |
| CN102306072A (en) * | 2011-07-22 | 2012-01-04 | 苏州瀚瑞微电子有限公司 | Positioning method of two-dimensional capacitance sensor |
| CN102306072B (en) * | 2011-07-22 | 2013-03-13 | 苏州瀚瑞微电子有限公司 | Positioning method of two-dimensional capacitance sensor |
| CN102253780A (en) * | 2011-07-22 | 2011-11-23 | 苏州瀚瑞微电子有限公司 | Method for positioning two-dimensional capacitance sensor |
| CN102236491A (en) * | 2011-07-22 | 2011-11-09 | 苏州瀚瑞微电子有限公司 | Scan configuration method and positioning method for capacitive sensor |
| CN103941927A (en) * | 2013-01-22 | 2014-07-23 | 华为终端有限公司 | Touch signal detecting circuit and method and touch equipment |
| US9720540B2 (en) | 2013-01-22 | 2017-08-01 | Huawei Device Co., Ltd. | Touch signal detection circuit and method, and touch device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101727242B (en) | 2012-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101727242B (en) | Method for sensing multiclutch on touch panel | |
| US7701447B2 (en) | Method for multiple objects detection on a capacitive touchpad | |
| US8907900B2 (en) | Touch-control module | |
| US8102376B2 (en) | Method for object detection on a capacitive touchpad | |
| CN101609385B (en) | Method and system for using a plurality of resistive touch screens to realize multi-point input | |
| CN100419657C (en) | Multi-object detection method for capacitance type touch panel | |
| US8368667B2 (en) | Method for reducing latency when using multi-touch gesture on touchpad | |
| TWI459250B (en) | Method for detecting multiple touch positions on touch panel | |
| US8743061B2 (en) | Touch sensing method and electronic device | |
| TW201104525A (en) | Determinative method and device of touch point movement | |
| CN101719045B (en) | Automatic correction method of touch panel | |
| CN102073430A (en) | Method for capacitive screen to automatically adjust induction value | |
| CN101526865B (en) | Method for sensing multi-finger touch by touch pad | |
| CN101393496B (en) | Touch control point detecting method of touch control plate | |
| CN102073427A (en) | Multi-finger detection method of capacitive touch screen | |
| CN102214028B (en) | Gesture recognition method and device for touch panel | |
| CN102541332A (en) | Click gesture judging method, touch induction control chip, touch system and computer system | |
| US20070126708A1 (en) | Method for gesture detection on a touch control bar with button and scroll bar functions | |
| CN104679312A (en) | Electronic device as well as touch system and touch method of electronic device | |
| JP2007025804A (en) | Method for detecting multiple articles by electrostatic capacity type touch panel | |
| CN101989137A (en) | Method and device for judging touch point displacement volume | |
| CN101937284B (en) | Method for detecting multi-point touch control on touch-control plate | |
| US20130127746A1 (en) | Method for controlling touch panel | |
| TW201642091A (en) | Touch apparatus and touch detecting method thereof | |
| US20130300685A1 (en) | Operation method of touch panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |