CN101615090B - Method and device for detecting touch signal - Google Patents
Method and device for detecting touch signal Download PDFInfo
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- CN101615090B CN101615090B CN2009100326575A CN200910032657A CN101615090B CN 101615090 B CN101615090 B CN 101615090B CN 2009100326575 A CN2009100326575 A CN 2009100326575A CN 200910032657 A CN200910032657 A CN 200910032657A CN 101615090 B CN101615090 B CN 101615090B
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Abstract
The invention provides a method for detecting a touch signal, which comprises the following steps: a device for detecting a touch signal, comprising a conduction unit, a touch detection unit, a signal sample unit and a signal processing unit which are electrically connected, is provided; when a user flips or touches the conduction unit, the conduction unit generates a touch signal; the touch detection unit detects position information of the conduction unit touched by fingers of the user in a flip way according to the touch signal received from the conduction unit; the signal sample unit samples the position information detected by the touch detection unit and samples a plurality of touch points; the signal processing unit calculates and analyzes coordinate figures of the touch points by combining with triangles and judges that the action types of the user are in a straight line, an arc or a circle. The invention also discloses a device for detecting a touch signal. The method and the device for detecting a touch signal have high detection accuracy and can judge the action types of the user.
Description
Technical field
The present invention relates to a kind of signal detecting method, particularly relate to a kind of touch signal detection method and device that is applicable to touch-screen.
Background technology
Current, along with growing with each passing day of interaction of multimedia information, the application of various teleworkings and amusement equipment is more and more general, and for example (Personal Digital Assistant is PDA) with panel computer etc. for televisor, mobile phone, personal digital assistant.Simultaneously,, comprise that a lot of household electrical appliance of televisor and consumption electronic products all dispose telepilot, so that user's operation along with the fast development of telecontrol engineering.Touch-screen can be widely used in the telepilot of various electronic installations and electronic installation as the common configuration of interaction of multimedia information, is the simplest at present, as to make things convenient for and meet the nature custom a kind of man-machine interaction mode.
The most frequently used in the market touch screen signal detection method is to adopt resistance-type film screen.This resistance-type film screen by one deck glass or organic glass as basic unit; The surface scribbles the transparency conducting layer of one deck ITO (indium tin oxide); Be stamped one deck outside surface cure process, smooth scratch resistant plastic layer above again; Its inside surface also scribbles one deck conductive layer (ITO or nickel gold), between two conductive layers, has many tiny transparent isolating points less than mil to separate insulation to them.When the finger touch screen, two conductive layers has just had a contact in the position, touch point, and controller detects this connection and calculates the position of X, Y axle.
Wherein, the two conductive layers workplace of electric resistance touch screen must be complete, on two sidelines of each workplace, respectively is coated with an elargol, and an end adds 5V voltage, and an end adds 0V, just can on a direction of workplace, form evenly continuous parallel voltage and distribute.After having detected touch, the analog quantity voltage value of A/D converted measurement contact point shows that according to it IJ5V pottery ratio formula just can calculate the position of touch point on this direction at once.
The signal detecting method of above-mentioned employing resistance-type film screen is to adopt the mode of voltage drop to look for coordinate axis; Promptly drive at X axle and each voltage of Y axle by a pair of 0～5V; When touch-screen is contacted; Because the loop is switched on and can produces voltage drop, further calculates coordinate axis according to the ratio that voltage drop is shared.Yet in the process of using, scratch appears in conductive layer unavoidably, because the susceptibility of conductive layer to swiping, the input precision of resistance-type film screen is not very high usually.In addition, the resistance-type film shields in the process of detection signal, and just the coordinate to a certain contact point calculates, and can't confirm that the user points the action route type of being done.
Also have a kind of method of utilizing software approach to carry out input, that is, set the motion track of reflecting object, and distribute corresponding digital as stipulated standard.At this motion track is that the glide direction that the sequence of 8 directions is promptly pointed is defined as 8 types, and uses 0～7 eight numeral respectively.The definition motion track, and utilize digital reference value to indicate motion track.Digital reference value is stored in the memory storage.From memory storage, transfer digital reference value.When the user carried out handwriting input on touch-screen, photosensitive device obtained the motion track of finger, and generated automatically and the input digit sequence when changing in the direction (slope) of track.When finger left touch-screen, this Serial No. and all built-in reference value sequences are carried out editing distance, and (Levenshtein Distance LD) calculated; At last, this pairing posture of that reference value or numeral apart from minimum is taken out, as recognition result; Wherein, the LEVENSHTEIN distance calculation is the algorithm of a kind of compare string string (String) similarity degree, like LD (s1; S2) equal to become { increasing deletion, replacement } operation sum that s2 needs to s1.Yet the sort signal detection method is an approximate processing, and accuracy of detection is still not high.
Summary of the invention
To the problems referred to above, be necessary the touch signal detection method that provides a kind of accuracy of detection higher.
In addition, also be necessary to provide the device that uses above-mentioned touch signal detection method.
A kind of touch signal detection method, it comprises the steps:
A., a touch signal pick-up unit is provided, and it comprises conduction unit, touch detection unit, sample of signal unit and the signal processing unit that electrically connects successively, the corresponding coordinate axis system of this conduction unit;
B. the user slips over or when contacting conduction unit, conduction unit produces a touch signal, and this touch signal is sent to touch detection unit;
C. touch detection unit detects the positional information that the user points the conduction unit that contacts when slipping over according to the touch signal of receiving;
D. sample to the detected positional information of touch detection unit in the sample of signal unit, extracts plurality of touch points, extraction if the bar contact point can form two or more triangles;
E. signal processing unit combines triangle to carry out computational analysis to the coordinate figure of said plurality of touch points, and judges that the type of action that the user makes is to draw straight line, camber line or draw circle.
Preferably, among the step a of said touch signal detection method and the step e, said signal processing unit comprises computing module and judge module.
Preferably; Among the step e of said touch signal detection method; Said computing module with the sampling plurality of touch points in adjacent three o'clock as leg-of-mutton three summits; According to the coordinate on these three summits calculate this leg-of-mutton area, the limit that is formed by connecting with non-conterminous two summits in the Atria summit is as the length on base, and then calculates this leg-of-mutton height; Said plurality of touch points can form two or more triangles, and computing module is adjacent two leg-of-mutton high additions, and will this adjacent two leg-of-mutton high be sent to judge module.
Preferably; Among the step e of said touch signal detection method; That said judge module obtains said adjacent two leg-of-mutton high additions and compare with a predetermined value, to judge that the action that the user makes at conduction unit is to draw a straight line, camber line or draw circle.
A kind of touch signal pick-up unit, it comprises conduction unit, touch detection unit, sample of signal unit and the signal processing unit that electrically connects successively.Each position distribution on the conduction unit is in a coordinate axis system, and this conduction unit is used for when the person of being used contacts, producing a touch signal to touch detection unit.Touch detection unit is used to detect the positional information of conduction unit that the user contacts.The sample of signal unit is used for the detected positional information of touch detection unit is sampled, and obtains the some respective coordinates of two or more leg-of-mutton contact points in coordinate axis system that form.Said signal processing unit is used for combining triangle to carry out computational analysis to the coordinate figure of said plurality of touch points, and judges that the action route type that the user makes is to draw straight line, camber line or draw circle.
Preferably, the signal processing unit of said touch signal pick-up unit comprises computing module and judge module.
Preferably; The computing module of said touch signal pick-up unit is used for adjacent three o'clock of plurality of touch points with sampling as leg-of-mutton three summits; According to the coordinate on these three summits calculate this leg-of-mutton area, the limit that is formed by connecting with non-conterminous two summits in the Atria summit is as the length on base, and then calculates this leg-of-mutton height; Said plurality of touch points can form two or more triangles, and computing module is adjacent two leg-of-mutton high additions, and will this adjacent two leg-of-mutton high be sent to judge module.
Preferably, that the judge module of said touch signal pick-up unit is used for said adjacent two leg-of-mutton high additions are obtained and compare with a predetermined value, to judge that the action that the user makes at conduction unit is to draw a straight line, camber line or draw circle.
Compared to prior art; Said touch signal detection method and device are through combining triangle to carry out computational analysis to the touch point coordinate; Thereby senses touch signal accurately, and can judge that the action route type that the user makes is to draw a straight line, camber line or draw circle.
Description of drawings
Fig. 1 is the functional block diagram of the signal supervisory instrument of preferred embodiments of the present invention.
Fig. 2 is the principle schematic of the signal detecting method of preferred embodiments of the present invention.
Fig. 3 is the process flow diagram of the signal detecting method of preferred embodiments of the present invention.
Embodiment
Touch screen signal detection method of the present invention and device are applicable to the electronic installation that uses touching technique, and (Personal Digital Assistant is PDA) with panel computer etc. like televisor, mobile phone, personal digital assistant; Simultaneously, also be applicable to the employed telepilot of above-mentioned electronic installation.
Below in conjunction with accompanying drawing preferred embodiment of the present invention is set forth in detail, thereby protection scope of the present invention is made more explicit defining so that advantage of the present invention and characteristic can be easier to it will be appreciated by those skilled in the art that.
See also Fig. 1, the touch signal pick-up unit 100 of preferred embodiments of the present invention comprises conduction unit 10, touch detection unit 20, sample of signal unit 30 and the signal processing unit 40 that electrically connects successively.
Petting Area when said conduction unit 10 is operated for the user; Each position distribution on this Petting Area is in a coordinate axis system; That is, each position of this conduction unit 10 is corresponding to the coordinate points in this coordinate axis system, when a certain position person of the being used finger of conduction unit 10 slips over or contacts; Conduction unit 10 can produce a touch signal, and this touch signal is sent to touch detection unit 20.
The touch signal detection method of preferred embodiments of the present invention comprises the steps:
Step S1, user slip over or contact conduction unit 10, and conduction unit 10 produces a touch signal, and this touch signal is sent to touch detection unit 20.
Step S2, touch detection unit 20 detects the positional information that the user points the conduction unit that contacts 10 when slipping over according to the touch signal that conduction unit 10 produces.
Step S3, sample of signal unit 30 pairs of touch detection units, 20 detected positional informations are sampled, and extract the user and point the plurality of touch points on conduction unit 10 when slipping over, and obtain the corresponding coordinate of this plurality of touch points.Wherein, the contact point number of sampling is more than three.
Step S4; The contact point coordinate of 40 pairs of sample of signal unit of signal processing unit, 30 sampling carries out computational analysis; Computing module 41 with the sampling plurality of touch points in adjacent three o'clock as leg-of-mutton three summits; Calculate this leg-of-mutton area and base length according to the coordinate on these three summits, and then calculate this leg-of-mutton height.This plurality of touch points can form two or more triangles, and signal processing unit calculates these leg-of-mutton height respectively, with adjacent two leg-of-mutton high additions, and will this adjacent two leg-of-mutton high be sent to judge module 43.
Step S5, that judge module 43 obtains adjacent two leg-of-mutton high additions and compare with a predetermined value, to judge that the action that the user makes at conduction unit 10 is to draw a straight line, camber line or draw circle.That if adjacent two leg-of-mutton high additions obtain and less than this predetermined value, then explain via the camber line of the corresponding contact point of said two triangles more directly, be to draw a straight line thereby draw the action that the user makes.That if adjacent two leg-of-mutton high additions obtain and greater than this predetermined value, then the explanation explanation is more curved via the camber line of the corresponding contact point of said two triangles, is make an arc line or circle thereby draw the action that the user makes.
Please further consult Fig. 3, illustrate the touch signal detection side ratio juris of preferred embodiments of the present invention.Each point in X shown in Fig. 3, the Y coordinate axis system is corresponding to each position of conduction unit 10, and this coordinate axis system is with O point initial point, and coordinate is (0,0).Four some a, b, c, d in the accompanying drawing are that sample of signal unit 30 pairs of touch detection units, 20 detected positional informations are sampled and obtained, its coordinate be respectively a (x1, y1), b (x2, y2), c (x3, y3), d (x4, y4).The computing module 41 of signal processing unit 40 is according to following formula, calculates triangle 1 area of being made up of a, b, three points of c to be:
S1＝1/2*(x1*y2+x2*y3+x3*y1-x1*y3-x2*y1-x3*y2)。
Also can obtain simultaneously the bottom side length c1 of triangle 1 according to the coordinate that a point and c are ordered, know the high h1 that can obtain triangle 1 behind area S1 and the bottom side length c1 of triangle 1.The area that in like manner can obtain the triangle of being made up of b, c, three points of d 2 is:
S2＝1/2*(x2*y3+x3*y4+x4*y2-x2*y4-x3*y2-x4*y3)
The coordinate of ordering according to b point and d is again obtained the bottom side length c2 of triangle 1, knows the high h2 that can obtain triangle 2 behind area S2 and the bottom side length c2 of triangle 2.
If a parameter is m; This parameter m is the variable that is gone out by computed in software, be appreciated that to be m=1 centimetre, if calculate h1+h2's and greater than m; If i.e. h1+h2＞m (1 centimetre); Explanation is more curved via the camber line of a, b, c, four points of d, judges that then the action that the user does is the picture arc, and what the user drew is a bigger camber line or circle.If h1 that calculates and h2 addition and less than m, if i.e. h1+h2＜m (1 centimetre) explains via the camber line of a, b, c, four points of d more directly, judge that then the action that the user does is to draw a straight line.
Be appreciated that through the size of parameter m is set, and the triangle that a plurality of contact points are constituted carrying out counting statistics, draw assembly average, is to draw a straight line, camber line or draw circle with this action that can judge that the user makes at conduction unit 10.
Touch signal detection method of the present invention and device be through combining triangle to carry out computational analysis to the touch point coordinate, thus senses touch signal accurately, and can judge that the action route that the user makes is to draw a straight line, camber line or draw circle.
The above; Be merely embodiment of the present invention; But protection scope of the present invention is not limited thereto; Any those of ordinary skill in the art are in the technical scope that the present invention disclosed, and variation or the replacement that can expect without creative work all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claims were limited.
Claims (4)
1. touch signal detection method, it is characterized in that: said detection method comprises the steps:
A., a touch signal pick-up unit is provided, and it comprises conduction unit, touch detection unit, sample of signal unit and the signal processing unit that electrically connects successively, the corresponding coordinate axis system of this conduction unit;
B. the user slips over or when contacting conduction unit, conduction unit produces a touch signal, and this touch signal is sent to touch detection unit;
C. touch detection unit detects the positional information that the user points the conduction unit that contacts when slipping over according to the touch signal of receiving;
D. sample to the detected positional information of touch detection unit in the sample of signal unit, extracts plurality of touch points, extraction if the bar contact point can form two or more triangles;
E. signal processing unit combines triangle to carry out computational analysis to the coordinate figure of said plurality of touch points, and judges that the type of action that the user makes is to draw straight line or camber line,
Signal processing unit among said step a and the step e comprises computing module and judge module,
Among the said step e; Computing module with the sampling plurality of touch points in adjacent three o'clock as leg-of-mutton three summits; According to the coordinate on these three summits calculate this leg-of-mutton area, along the finger path of streaking; The limit that is formed by connecting with non-conterminous the first, the 3rd summit in the Atria summit is as the length on base, and then calculates this leg-of-mutton height; Said plurality of touch points can form two or more triangles, and computing module is adjacent two leg-of-mutton high additions, and will this adjacent two leg-of-mutton high be sent to judge module.
2. touch signal detection method as claimed in claim 1; It is characterized in that: among the said step e; That judge module obtains said adjacent two leg-of-mutton high additions and compare with a predetermined value, to judge that the action that the user makes at conduction unit is to draw a straight line or a camber line.
3. touch signal pick-up unit is characterized in that: said pick-up unit comprises conduction unit, touch detection unit, sample of signal unit and the signal processing unit that electrically connects successively; Each position distribution on the conduction unit is in a coordinate axis system, and conduction unit is used for when the person of being used contacts, producing a touch signal to touch detection unit; Touch detection unit is used to detect the positional information of conduction unit that the user contacts; The sample of signal unit is used for the detected positional information of touch detection unit is sampled, and obtains the some respective coordinates of two or more leg-of-mutton contact points in coordinate axis system that form; Said signal processing unit is used for combining triangle to carry out computational analysis to the coordinate figure of said plurality of touch points, and judges that the action route type that the user makes is to draw straight line or camber line,
Said signal processing unit comprises computing module and judge module,
Said computing module is used for adjacent three o'clock of plurality of touch points with sampling as leg-of-mutton three summits; Calculate this leg-of-mutton area, streak non-conterminous the first, the 3rd summit is formed by connecting in three summits in path limit length with this triangle along finger according to the coordinate on these three summits, and then calculate this leg-of-mutton height as the base; Said plurality of touch points can form two or more triangles, and computing module is adjacent two leg-of-mutton high additions, and will this adjacent two leg-of-mutton high be sent to judge module.
4. touch signal pick-up unit as claimed in claim 3; It is characterized in that: that said judge module is used for said adjacent two leg-of-mutton high additions are obtained and compare with a predetermined value, to judge that the action that the user makes at conduction unit is to draw a straight line or a camber line.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101916153B (en) * | 2010-08-04 | 2014-07-16 | 中兴通讯股份有限公司 | Method, device and terminal for positioning touch point of touch screen |
| CN102129347A (en) * | 2011-03-07 | 2011-07-20 | 惠州Tcl移动通信有限公司 | Touch screen-based target calling method and device |
| CN102401629A (en) * | 2011-10-19 | 2012-04-04 | 惠州Tcl移动通信有限公司 | Mobile phone and angle measuring method thereof |
| CN102609213A (en) * | 2012-02-21 | 2012-07-25 | 游图明 | Method and device for rotating three-dimensional image on electronic equipment with touch-sensitive display |
| CN104506765B (en) * | 2014-11-21 | 2018-05-11 | 惠州Tcl移动通信有限公司 | A kind of mobile terminal and its focusing method based on touch gestures |
| CN113177042B (en) * | 2021-05-12 | 2023-03-31 | 中移智行网络科技有限公司 | Map track line processing method and device |
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| EP1881398A1 (en) * | 2006-06-30 | 2008-01-23 | Hochschule für Gestaltung und Kunst (HGKZ) | Method for positioning a cursor on a touch-sensitive screen |
| CN101369199A (en) * | 2007-08-15 | 2009-02-18 | 国际商业机器公司 | Method for correcting coordinate on contact panel to real display coordinate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1881398A1 (en) * | 2006-06-30 | 2008-01-23 | Hochschule für Gestaltung und Kunst (HGKZ) | Method for positioning a cursor on a touch-sensitive screen |
| CN101369199A (en) * | 2007-08-15 | 2009-02-18 | 国际商业机器公司 | Method for correcting coordinate on contact panel to real display coordinate |
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Address after: 266004 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Patentee after: Hisense Video Technology Co.,Ltd. Address before: 266004 No. 151, Zhuzhou Road, Laoshan District, Shandong, Qingdao Patentee before: HISENSE ELECTRIC Co.,Ltd. |
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