CN104216597B - The touch detecting method and system of a kind of resistive touch screen - Google Patents
The touch detecting method and system of a kind of resistive touch screen Download PDFInfo
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- CN104216597B CN104216597B CN201410405797.3A CN201410405797A CN104216597B CN 104216597 B CN104216597 B CN 104216597B CN 201410405797 A CN201410405797 A CN 201410405797A CN 104216597 B CN104216597 B CN 104216597B
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- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical group [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 8
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Abstract
The invention discloses a kind of touch detecting method of resistive touch screen and system, method includes：According to default touch pressure, calibration initialization is carried out, the pressure calibration data in each region of touch screen are obtained；According to pressure calibration data, processing is identified in the touch screen region that appearance action is carried out to detecting.System includes：Initialization unit and recognition unit.The present invention obtains pressure calibration data, then by calculating contact resistance value in real time, contrasted with the contact resistance threshold value in pressure calibration data, so as to effectively identify setting-out track by initialization process.The present invention can set different threshold values according to the different zones of touch-screen, can effectively prevent occurring situation about breaking during setting-out.It the composite can be widely applied in touch screen technical field.
Description
Technical field
The present invention relates to touch screen detection technique field, more particularly to a kind of resistive touch screen touch detecting method and
System.
Background technology
Resistive touch screen is a kind of sensor, and substantially film adds the structure of glass, and film and glass are adjacent
ITO is scribbled on simultaneously（Nano indium tin metal oxide）Coating, ITO has good electric conductivity and the transparency.Grasped when touching
When making, the ITO of film lower floor can touch the ITO of glass superstrate, and corresponding electric signal is spread out of via inductor, by conversion electricity
Road is sent to processor, and X on screen, Y value are converted into by computing, and completes the action that clicks, and is presented on screen.
The advantage of resistive touch screen：
1st, the accuracy of resistance type touch control screen is high, can arrive the rank of pixel, applicable ultimate resolution is reachable
4096x4096。
2nd, screen is not influenceed by dust, steam and greasy dirt, can be used in the environment of relatively low or higher temperature.
3rd, resistance type touch control screen uses pressure sensitive, can be touched with any object, even with gloves
It can operate, it is possible to for carrying out handwriting recognition.
4th, resistance type touch control screen is due to ripe technology and relatively low threshold, and cost is relatively inexpensive.
The shortcoming of resistive touch screen：
1st, resistive touch screen is induction pressure, in using for pressure, conductive material come in contact can just detect it is dynamic
Make.
2nd, resistance be touch-screen due to the limitation of technique, the problem of minimum operational pressure in each region has inconsistent.
3rd, resistance type touch control screen is easier to because scuffing etc. causes screen touch-control to be partially damaged.
Resistive touch screen is main by upper electrode, lower electrode, 3 basic structures compositions such as connector.
Upper electrode：There are the PET sheet materials of ITO films.
Lower electrode：There are PET sheet materials, glass or the plastics of ITO films, the well-regulated insulation small salient point of printed thereon.
FPC or Myiar：The connection between TTP and device is heat fused between insertion upper and lower part electrode.
Layers of two-sided：Fixed with adhesive tension, lower electrode and upper and lower part electrode is kept certain intervals.
ITO (indium oxide) film：Nesa coating.It is very thin, i.e., transparent and conduction.
Because upper electrode is made up of material very soft film, it is therefore desirable between upper electrode and lower electrode
Insulated particle is added, and is filled with air wherein, the situation of misoperation occurs to prevent collapsing for upper electrode, but fill
Enter to may result in whole screen after air and be gradually reduced from centre to edge thickness, observe touch below magnifying glass as follows
Screen, then can find touch-screen upper surface can be micro, slight in intermediate region projection, as shown in Figure 3.
When touch-screen is normally clicked on, the stress of two aspects is overcome, one is the deformational stress of material in itself,
Still further aspect is due to then the extruded stress of air of internal closing.Because touch-screen intermediate region is wanted slightly compared with periphery
Projection, so the different zones of point touching screen, the actuating length for contacting upper electrode and lower electrode is also different, therefore
The minimum operational pressure in each region of touch-screen is different, and intermediate region is bigger than normal, it is assumed that be Fmax, and edge is less than normal, false
Fmin is set to, due to the presence of this architectural feature, pressure F is used when with signature（Fmin<F<Fmax）Carry out setting-out when
Wait, then the problem of easily broken string occur in intermediate region.
The content of the invention
In order to solve the above-mentioned technical problem, the one of broken string situation can effectively be prevented it is an object of the invention to provide a kind of
Plant the touch detecting method and system of resistive touch screen.
The technical solution adopted in the present invention is：
A kind of touch detecting method of resistive touch screen, comprises the following steps：
A, according to default touch pressure, carry out calibration initialization, obtain the pressure calibration data in each region of touch screen；
B, according to pressure calibration data, processing is identified in the touch screen region that appearance action is carried out to detecting.
As a kind of further improvement of the touch detecting method of described resistive touch screen, the step A includes：
A1, according to default touch pressure, setting-out operation is carried out to each region on touch-screen；
Each corresponding coordinate of point of setting-out track in A2, record line drawing process, and calculate each point pair of setting-out track
The contact resistance value answered, and then the contact resistance threshold value of corresponding region is set to, obtain the pressure in each region of touch screen
Calibration data.
As a kind of further improvement of the touch detecting method of described resistive touch screen, calculated in the step A2
Each corresponding contact resistance value of point of setting-out track, it includes：
A21, to 3.3V voltages in the X+ terminations for the point to be calculated, X- ends ground connection carries out voltage measurement to Y+ ends, obtains the
One voltage V1；
A22, to 3.3V voltages in the Y+ terminations for the point to be calculated, Y- ends ground connection carries out voltage measurement to X+ ends, obtains the
Two voltage V2；
A23, to 3.3V voltages in the Y+ terminations for the point to be calculated, X- ends ground connection carries out voltage measurement to Y- ends, obtains the
Three voltage V3, carry out voltage measurement to X+ ends, obtain the 4th voltage V4；
A24, first voltage, second voltage, tertiary voltage and the 4th voltage obtained according to measurement, to the contact electricity of the point
Resistance is calculated.
As a kind of further improvement of the touch detecting method of described resistive touch screen, connect in the step A24
The calculation formula of electric shock resistance is：
Wherein, Rtouch represents contact resistance value, and V1 represents first voltage, and V2 represents second voltage, and V3 represents the 3rd electricity
Pressure, V4 represents the 4th voltage, and Rxplate represents the X-plane resistance value of touch-screen, and n represents to measure the ADC of voltage conversion essence
Degree.
As a kind of further improvement of the touch detecting method of described resistive touch screen, the step B includes：
B1, the touch screen region acted to detecting appearance carry out the calculating of contact resistance value, obtain real-time contact resistance
Value；
B2, the contact resistance threshold value for judging the corresponding region whether real-time contact resistance value is more than in pressure calibration data,
If so, then the point is abandoned；Otherwise, the point is retained.
Another technical scheme of the present invention is：
A kind of touch detecting system of resistive touch screen, including：
Initialization unit, for according to default touch pressure, carrying out calibration initialization, obtaining each region of touch screen
Pressure calibration data；
Recognition unit, for according to pressure calibration data, the touch screen region that appearance action is carried out to detecting to be known
Manage in other places.
It is used as a kind of further improvement of the touch detecting system of described resistive touch screen, the initialization unit bag
Include：
Operating unit, for according to default touch pressure, setting-out operation to be carried out to each region on touch-screen；
Coordinate record unit, each corresponding coordinate of point for recording setting-out track in line drawing process；
Threshold computation unit, for calculating each corresponding contact resistance value of point of setting-out track, and is set to pair
The contact resistance threshold value in region is answered, the pressure calibration data in each region of touch screen are obtained.
It is used as a kind of further improvement of the touch detecting system of described resistive touch screen, the recognition unit bag
Include：
Real-time computing unit, the touch screen region for being acted to detecting appearance carries out the calculating of contact resistance value, obtains
To real-time contact resistance value；
Judging unit, the contact for judging the corresponding region whether real-time contact resistance value is more than in pressure calibration data
Resistance threshold, if so, then abandoning the point；Otherwise, the point is retained.
The beneficial effects of the invention are as follows：
The touch detecting method and system of a kind of resistive touch screen of the present invention obtain pressure calibration by initialization process
Data, then by calculating contact resistance value in real time, are contrasted with the contact resistance threshold value in pressure calibration data, so as to
Effectively identify setting-out track.The present invention can set different threshold values according to the different zones of touch-screen, can effectively prevent picture
Occurs situation about breaking during line.
Brief description of the drawings
The embodiment to the present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is a kind of step flow chart of the touch detecting method of resistive touch screen of the invention；
Fig. 2 is a kind of system module figure of the touch detecting system of resistive touch screen of the invention；
Fig. 3 is the cross section structure diagram of resistance type touch control screen of the present invention；
Fig. 4 is the electrical connection simulation drawing of resistance type touch control screen of the present invention.
Embodiment
With reference to Fig. 1, a kind of touch detecting method of resistive touch screen of the invention comprises the following steps：
A, according to default touch pressure, carry out calibration initialization, obtain the pressure calibration data in each region of touch screen；
B, according to pressure calibration data, processing is identified in the touch screen region that appearance action is carried out to detecting.
As a kind of further improvement of the touch detecting method of described resistive touch screen, the step A includes：
A1, according to default touch pressure, setting-out operation is carried out to each region on touch-screen；
Each corresponding coordinate of point of setting-out track in A2, record line drawing process, and calculate each point pair of setting-out track
The contact resistance value answered, and then the contact resistance threshold value of corresponding region is set to, obtain the pressure in each region of touch screen
Calibration data.
As a kind of further improvement of the touch detecting method of described resistive touch screen, calculated in the step A2
Each corresponding contact resistance value of point of setting-out track, it includes：
A21, to 3.3V voltages in the X+ terminations for the point to be calculated, X- ends ground connection carries out voltage measurement to Y+ ends, obtains the
One voltage V1；
A22, to 3.3V voltages in the Y+ terminations for the point to be calculated, Y- ends ground connection carries out voltage measurement to X+ ends, obtains the
Two voltage V2；
A23, to 3.3V voltages in the Y+ terminations for the point to be calculated, X- ends ground connection carries out voltage measurement to Y- ends, obtains the
Three voltage V3, carry out voltage measurement to X+ ends, obtain the 4th voltage V4；
A24, first voltage, second voltage, tertiary voltage and the 4th voltage obtained according to measurement, to the contact electricity of the point
Resistance is calculated.
As a kind of further improvement of the touch detecting method of described resistive touch screen, connect in the step A24
The calculation formula of electric shock resistance is：
Wherein, Rtouch represents contact resistance value, and V1 represents first voltage, and V2 represents second voltage, and V3 represents the 3rd electricity
Pressure, V4 represents the 4th voltage, and Rxplate represents the X-plane resistance value of touch-screen, and n represents to measure the ADC of voltage conversion essence
Degree.
With reference to Fig. 4, X+, X- and Y+, Y- represent two conductive working faces of touch-screen, and X is led when Rx1 and Rx2 represent to touch
The grading resistance produced when the grading resistance produced on electric working face, Ry1 and Ry2 represent to touch on the conductive working faces of Y.
As a kind of further improvement of the touch detecting method of described resistive touch screen, the step B includes：
B1, the touch screen region acted to detecting appearance carry out the calculating of contact resistance value, obtain real-time contact resistance
Value；
B2, the contact resistance threshold value for judging the corresponding region whether real-time contact resistance value is more than in pressure calibration data,
If so, then the point is abandoned；Otherwise, the point is retained.
Wherein, it is consistent with step A3 to the calculation of contact resistance value in step B1.
With reference to Fig. 2, a kind of touch detecting system of resistive touch screen of the invention, including：
Initialization unit, for according to default touch pressure, carrying out calibration initialization, obtaining each region of touch screen
Pressure calibration data；
Recognition unit, for according to pressure calibration data, the touch screen region that appearance action is carried out to detecting to be known
Manage in other places.
It is used as a kind of further improvement of the touch detecting system of described resistive touch screen, the initialization unit bag
Include：
Operating unit, for according to default touch pressure, setting-out operation to be carried out to each region on touch-screen；
Coordinate record unit, each corresponding coordinate of point for recording setting-out track in line drawing process；
Threshold computation unit, for calculating each corresponding contact resistance value of point of setting-out track, and is set to pair
The contact resistance threshold value in region is answered, the pressure calibration data in each region of touch screen are obtained.
It is used as a kind of further improvement of the touch detecting system of described resistive touch screen, the recognition unit bag
Include：
Real-time computing unit, the touch screen region for being acted to detecting appearance carries out the calculating of contact resistance value, obtains
To real-time contact resistance value；
Judging unit, the contact for judging the corresponding region whether real-time contact resistance value is more than in pressure calibration data
Resistance threshold, if so, then abandoning the point；Otherwise, the point is retained.
In the application of electronic signature, the problem of person's handwriting for how recognizing signature is one very crucial, and person's handwriting and pressure
Corresponding relation is there is, pressure is bigger, and person's handwriting is thicker, and pressure is lighter, and person's handwriting is thinner；And for resistive touch screen, pressure and
Contact resistance between levels is then into corresponding relation, and pressure is bigger, contacts more reliable between levels, then its contact resistance
It is smaller, conversely, then contact resistance is bigger.
The general whole screen surfaces of resistive touch screen are not smooth, but intermediate region occurs in that protrusion somewhat,
, it is necessary to bigger operational stroke, relative touch screen periphery, the stress and sky of the material being subject to when being clicked in intermediate region
The stress of gas extruding all can be some larger, thus the operating pressure of intermediate region also can be larger than fringe region.
Initialized according to method as above, wherein enumerate it is default apply 60g touch pressure when partial dot connect
Get an electric shock and hinder, obtained test data such as table 1：
The contact resistance value in each region of table 1（Under 60g operating pressures）
It is distributed as upper table 1 gives the contact resistance obtained during the different zones with 60g operating pressure point touching screen,
Can significantly it find out from table, when being clicked on same operating pressure, the contact resistance of central area is bigger than normal,
Edge is less than normal, and this table then provides original calibration data for software calibration.
Common people are when setting-out, and the dynamics of its setting-out is substantially what is be consistent, obtain as above these initial data
Afterwards, then the threshold value of the contact resistance in each region is set inside software according to this resistance value, had when detecting some region
When action, contact resistance value when calculating this, if more than the contact resistance threshold value of setting, proved now
On the contrary operating pressure is less than 60g's, then abandons this point, then retain, and same operating pressure ought be used by so ensuring that
The problem of broken string being avoided the occurrence of when setting-out.
Above is the preferable implementation to the present invention is illustrated, but the invention is not limited to the implementation
Example, those skilled in the art can also make a variety of equivalent variations or replace on the premise of without prejudice to spirit of the invention
Change, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (4)
1. a kind of touch detecting method of resistive touch screen, it is characterised in that：Comprise the following steps：
A, according to default touch pressure, carry out calibration initialization, obtain the pressure calibration data in each region of touch screen；
B, according to pressure calibration data, processing is identified in the touch screen region that appearance action is carried out to detecting；
The step A includes：
A1, according to default touch pressure, setting-out operation is carried out to each region on touch-screen；
Each corresponding coordinate of point of setting-out track in A2, record line drawing process, and it is corresponding to calculate each point of setting-out track
Contact resistance value, and then the contact resistance threshold value of corresponding region is set to, obtain the pressure calibration in each region of touch screen
Data；
Each corresponding contact resistance value of point of setting-out track is calculated in the step A2, it includes：
A21, to 3.3V voltages in the X+ terminations for the point to be calculated, X- ends ground connection carries out voltage measurement to Y+ ends, obtains the first electricity
Press V1；
A22, to 3.3V voltages in the Y+ terminations for the point to be calculated, Y- ends ground connection carries out voltage measurement to X+ ends, obtains the second electricity
Press V2；
A23, to 3.3V voltages in the Y+ terminations for the point to be calculated, X- ends ground connection carries out voltage measurement to Y- ends, obtains the 3rd electricity
V3 is pressed, voltage measurement is carried out to X+ ends, the 4th voltage V4 is obtained；
A24, first voltage, second voltage, tertiary voltage and the 4th voltage obtained according to measurement, to the contact resistance value of the point
Calculated；
The calculation formula of contact resistance value is in the step A24：
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<mi>R</mi>
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<mo>(</mo>
<mi>V</mi>
<mn>3</mn>
<mo>-</mo>
<mi>V</mi>
<mn>4</mn>
<mo>)</mo>
<mo>&times;</mo>
<mi>V</mi>
<mn>1</mn>
<mo>&times;</mo>
<mi>R</mi>
<mi>x</mi>
<mi>p</mi>
<mi>l</mi>
<mi>a</mi>
<mi>t</mi>
<mi>e</mi>
</mrow>
<mrow>
<msup>
<mn>2</mn>
<mi>n</mi>
</msup>
<mo>&times;</mo>
<mi>V</mi>
<mn>4</mn>
</mrow>
</mfrac>
</mrow>
Wherein, Rtouch represents contact resistance value, and V1 represents first voltage, and V2 represents second voltage, and V3 represents tertiary voltage, V4
The 4th voltage is represented, Rxplate represents the X-plane resistance value of touch-screen, and n represents to measure the ADC of voltage conversion accuracy.
2. a kind of touch detecting method of resistive touch screen according to claim 1, it is characterised in that：The step B
Including：
B1, the touch screen region acted to detecting appearance carry out the calculating of contact resistance value, obtain real-time contact resistance value；
B2, the contact resistance threshold value for judging the corresponding region whether real-time contact resistance value is more than in pressure calibration data, if so,
Then the point is abandoned；Otherwise, the point is retained.
3. a kind of touch detecting system of resistive touch screen, it is characterised in that including：
Initialization unit, for according to default touch pressure, carrying out calibration initialization, obtaining the pressure in each region of touch screen
Calibration data；
Recognition unit, for according to pressure calibration data, place to be identified in the touch screen region that appearance action is carried out to detecting
Reason；
The initialization unit includes：
Operating unit, for according to default touch pressure, setting-out operation to be carried out to each region on touch-screen；
Coordinate record unit, each corresponding coordinate of point for recording setting-out track in line drawing process；
Threshold computation unit, for calculating each corresponding contact resistance value of point of setting-out track, and is set to correspondence area
The contact resistance threshold value in domain, obtains the pressure calibration data in each region of touch screen；
Each corresponding contact resistance value of point of setting-out track is calculated in the threshold computation unit, it includes：
To 3.3V voltages in the X+ terminations for the point to be calculated, X- ends ground connection carries out voltage measurement to Y+ ends, obtains first voltage
V1；
To 3.3V voltages in the Y+ terminations for the point to be calculated, Y- ends ground connection carries out voltage measurement to X+ ends, obtains second voltage
V2；
To 3.3V voltages in the Y+ terminations for the point to be calculated, X- ends ground connection carries out voltage measurement to Y- ends, obtains tertiary voltage
V3, carries out voltage measurement to X+ ends, obtains the 4th voltage V4；
First voltage, second voltage, tertiary voltage and the 4th voltage obtained according to measurement, the contact resistance value to the point is carried out
Calculate；
The calculation formula of the contact resistance value is：
<mrow>
<mi>R</mi>
<mi>t</mi>
<mi>o</mi>
<mi>u</mi>
<mi>c</mi>
<mi>h</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mo>(</mo>
<mi>V</mi>
<mn>3</mn>
<mo>-</mo>
<mi>V</mi>
<mn>4</mn>
<mo>)</mo>
<mo>&times;</mo>
<mi>V</mi>
<mn>1</mn>
<mo>&times;</mo>
<mi>R</mi>
<mi>x</mi>
<mi>p</mi>
<mi>l</mi>
<mi>a</mi>
<mi>t</mi>
<mi>e</mi>
</mrow>
<mrow>
<msup>
<mn>2</mn>
<mi>n</mi>
</msup>
<mo>&times;</mo>
<mi>V</mi>
<mn>4</mn>
</mrow>
</mfrac>
</mrow>
Wherein, Rtouch represents contact resistance value, and V1 represents first voltage, and V2 represents second voltage, and V3 represents tertiary voltage, V4
The 4th voltage is represented, Rxplate represents the X-plane resistance value of touch-screen, and n represents to measure the ADC of voltage conversion accuracy.
4. a kind of touch detecting system of resistive touch screen according to claim 3, it is characterised in that：The identification is single
Member includes：
Real-time computing unit, the touch screen region for being acted to detecting appearance carries out the calculating of contact resistance value, obtains reality
When contact resistance value；
Judging unit, the contact resistance for judging the corresponding region whether real-time contact resistance value is more than in pressure calibration data
Threshold value, if so, then abandoning the point；Otherwise, the point is retained.
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| CN104951135B (en) * | 2015-06-29 | 2018-09-14 | 努比亚技术有限公司 | A kind of information processing unit and method |
| CN105224133B (en) * | 2015-10-08 | 2018-01-23 | 广东欧珀移动通信有限公司 | A kind of pressure calibration method and device |
| CN106598319A (en) * | 2015-10-20 | 2017-04-26 | 中兴通讯股份有限公司 | Method and device for calibrating sensitivity of pressure screen |
| CN105892861A (en) * | 2016-03-31 | 2016-08-24 | 联想(北京)有限公司 | Information processing method and system and electronic equipment |
| TWM537259U (en) * | 2016-10-14 | 2017-02-21 | 奕力科技股份有限公司 | Three dimensional touch control apparatus |
| CN106933423B (en) * | 2017-03-14 | 2019-03-05 | 维沃移动通信有限公司 | A kind of method and mobile terminal of pressure touch detection |
| CN107092392B (en) * | 2017-04-20 | 2020-07-03 | 维沃移动通信有限公司 | Pressure touch method and terminal |
| CN111007349B (en) * | 2019-12-27 | 2022-02-15 | 黄石瑞视光电技术股份有限公司 | Touch screen operating force testing device and testing method |
| CN112346593B (en) * | 2020-10-15 | 2024-06-11 | 北京小米移动软件有限公司 | Touch screen calibration method and touch screen calibration device |
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| CN103135810A (en) * | 2011-11-24 | 2013-06-05 | 比亚迪股份有限公司 | Pressure sensitivity adjustment method of touch screen and pressure sensitivity adjustment system of touch screen |
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