CN106909257A - A kind of multiple spot actual touch method of surface acoustic wave touch screen - Google Patents
A kind of multiple spot actual touch method of surface acoustic wave touch screen Download PDFInfo
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- CN106909257A CN106909257A CN201710121204.4A CN201710121204A CN106909257A CN 106909257 A CN106909257 A CN 106909257A CN 201710121204 A CN201710121204 A CN 201710121204A CN 106909257 A CN106909257 A CN 106909257A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
- G06F3/0433—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves in which the acoustic waves are either generated by a movable member and propagated within a surface layer or propagated within a surface layer and captured by a movable member
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Acoustics & Sound (AREA)
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- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
The invention discloses a kind of multiple spot actual touch method of surface acoustic wave touch screen, comprise the following steps：（1）, in X-axis or Y-axis at least provided with one group of transmitting transducer arrays or receive transducer array；（2）, by radiating circuit drive transmitting transducer acoustic waves signal, by receiving circuit control receive transducer receiving surface acoustic signals；（3）, when have touch body touch when, surface acoustic wave signal reaches receive transducer through touching after body reflects, when threshold values of the surface acoustic wave signal intensity more than setting, receiving circuit sends to CPU MCU the surface acoustic wave signal, and CPU MCU determines to touch the coordinate of body.The present invention realizes the multiple spot actual touch response of the and above at 2 points, has been inherently eliminated terrible point, and the unlimited touch that can be just truly realized with existing technique in touch area is responded.
Description
It is 2013.6.14, Application No. 201310235013.2, entitled " one kind realization the applying date that the application is
In the method for surface acoustic wave touch screen multiple spot actual touch " patent application patent divisional application.
Technical field
The present invention relates to a kind of surface acoustic wave touch screen, more particularly to a kind of surface acoustic wave touch screen multiple spot actual touch
Method.
Background technology
Current touch-screen mainly has a types such as surface acoustic wave, infrared and electric capacity, wherein surface acoustic wave touch screen due to
Have the advantages that high resolution, response time are short, environment adaptation is strong, good stability, translucency are good, as several main flow touch-screens
In most promotional value touch-screen.
Existing general surface acoustic wave touching screen only has X-axis and the orthogonal physical positioning axle of Y-axis two, based on axis
Intersecting principle can accurately identify a touch point and obtain unique one group of position coordinate data, but for two or more
Touch point simultaneously when operating, such as it is possible that three or four combinatorial coordinates of position during two touch points, wherein one
Individual or two combinatorial coordinates of position are terrible point coordinates, and the touch point for causing report is not real touch point, and this allows for table
Face acoustic wave touching screen will fail when multiple spot is touched simultaneously, significantly limit the development of surface acoustic wave touch screen.
Therefore, propose to start with from software and hardware both direction respectively in the prior art and solve the above problems：
Firstth, from software, surface acoustic wave touch field touches firmware by upgrading, and touches body and is used when touch area is entered
Time-sharing approach or zone method realize touch point two point detection, referred to as soft two point on software；
Wherein time-sharing approach requirement two touch bodies first point touching region when must in different time points, two time points interval
At least need to differ a touch-screen response time, such as 10.4ms, after first touches body point touching region, touch system detection
To first true touch point, and the true coordinate position of the touch point is recorded, second touches body appointing after 10.4ms
When between behind point touching region, newly there is one or two reference axis data to I haven't seen you for ages, such as it is new an X-coordinate or Y occur
During coordinate, fixer system can be emerging X-coordinate or the Y-coordinate or X-coordinate of Y-coordinate matching missing, the Y of the missing automatically
First reference axis data of touch body when coordinate or X-coordinate come from new appearance one X-coordinate or Y-coordinate.If with stylish
An X-coordinate and Y-coordinate are occurred in that, fixer system is automatically matched emerging X-coordinate and Y-coordinate, identifies second
Individual real touch point.But time-sharing approach be limited as process the 3rd touch body point touching region when, the 3rd touch body
When touching body crossover location positioned at the first two, occur without new X-coordinate or Y coordinate data, lead to not the 3rd touch of identification
Body.
And touch-screen to be physically partitioned into several regions for zone method requirement, such as X-axis is divided into many zonules, led to
Cross judgement touch point and enter release respective regions, true point is distinguished from ghost point, such as in the prior art when two touch bodies
Simultaneously point touching region, and two touch points without identical X and Y coordinates axle when, firmware can collect simultaneously two X-coordinate and
Two Y-coordinate, when X and Y is matched, it may appear that two terrible points, lead to not two actual positions of touch body of identification.But due to
Touch-screen physical segmentation has been gone out many different zones by zone method, touches body when touch area is moved, two touch points
Meeting other regions of entrance one in front and one in back, just two true touch points can be distinguished by this front and rear time difference from ghost point,
This principle is also similar to time-sharing approach.The critical defect of zone method is the None- identified multiple point touching in same subregion, it is impossible to
Recognize that the defect of the 3rd touch body is still present, for example touch body at first the two of subregion enters the second subregion simultaneously
Moment, the 3rd touches body and also clicks the second subregion first at the moment because two touch points in the first subregion without
Method recognize, enter into second subregion moment increased again the 3rd touch body, collect three different Y in the second subregion
Coordinate, two different X-coordinate, fixer system have six kinds of combinations when matching, wherein three kinds are combined as terrible point.
From the above in soft two point zone method because the imperfection in its principle cause it is multiple touch body when error rate it is higher,
It is very high to surface acoustic wave signal requirement in time-sharing approach in addition to the time interval touched first to multi-touch body is required, cause
Surface acoustic wave touch screen is relatively difficult in the production for realizing stabilization.For example when surface acoustic wave touch screen makes, especially greatly
The surface acoustic wave touch screen of size, it is desirable to which processing technology precision is higher, striped silk-screen printing, baking temperature precision are higher, so that
Manufacture difficulty is increased, while the otherness between each surface acoustic wave touch screen is also larger, causes steady production surface acoustic wave to touch
The difficulty for touching screen increases.
Secondth, from hardware, China Patent No. " 200920298621.7 " discloses a kind of multi-point surface acoustic wave and touches
Screen, its publication date is on 09 08th, 2010, and its technical scheme is that the multi-point surface acoustic wave touch screen includes controller, X
Axle positioner and Y-axis positioner, also including independent Z axis positioner, Z axis positioner includes being arranged on screen body
Two Z axis transmitting transducers, two Z axis receive transducers, two groups of Z axis transmitting striped arrays and two groups of Z axis receive striped array,
Two groups of Z axis transmitting striped arrays and two groups of Z axis receive striped array distributions and are enclosed into positioning in screen body quadrangle, and screen body side with
Corresponding Z axis transmitting striped array or Z axis receive striped array parallel, and Z axis positioner forms Z axis, and X-axis positioner is formed
X-axis, Y-axis positioner forms Y-axis, and Z axis intersect with X-axis and Y-axis.
Be increased in the patent one can assisting sifting ghost point Z axis, increase Z axis after at most can simultaneously recognize two physics
Body is touched, continues to increase by one group of U axle vertical with Z axis, at most can simultaneously recognize three physical touch bodies, therefore coordinate in theory
Axle has N groups, so that it may while N-1 physical touch body is recognized, but increase reference axis group number need to also increase phase in touch-screen body surrounding
The reflection strip array answered, and surface acoustic wave signal is by producing many hash after multigroup reflection strip array, and hold
Easy receive transducer is received, so as to have a strong impact on fixer system coordinate identification point, while increase multigroup reflection strip array needing
Want broader touch-screen body surrounding to meet the space arrangement demand of reflection strip array, this is light-duty with existing market demand
Change, narrow side, boundlessization and panelized touch-screen are speeded opposite to each other, and N group coordinates cannot have also been produced with existing processing technology
The surface acoustic wave touch screen of axle.
The content of the invention
It is an object of the invention to overcome the above-mentioned problems in the prior art, there is provided a kind of surface acoustic wave touch screen
Multiple spot actual touch method, the present invention realizes the multiple spot actual touch response of the and above at 2 points, has been inherently eliminated terrible point,
And the unlimited touch that can be just truly realized with existing technique in touch area is responded.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of multiple spot actual touch method of surface acoustic wave touch screen, it is characterised in that comprise the following steps：
（1）, in X-axis or Y-axis at least provided with one group of transmitting transducer arrays formed by multiple transmitting transducers, or at least set
Put one group of receive transducer array formed by multiple receive transducers；
（2）, by radiating circuit drive transmitting transducer acoustic waves signal, by receiving circuit control receive transducer receive
Surface acoustic wave signal；
（3）, when have touch body touch when, surface acoustic wave signal through touch body reflect after reach receive transducer, work as surface acoustic wave
When signal intensity is more than the threshold values for setting, receiving circuit sends to CPU MCU, centre the surface acoustic wave signal
Reason unit MCU determines to touch the coordinate of body.
At least provided with one group of transmitting transducer arrays in the X-axis, at least provided with one group of receive transducer battle array in the Y-axis
Row, all transmitting transducers acoustic waves signal simultaneously is driven by radiating circuit；All receptions are controlled to change by receiving circuit
Can device receiving surface acoustic signals simultaneously, or independent receiving surface sound wave is believed successively to control all receive transducers by receiving circuit
Number.
When there is one to touch body touch, surface acoustic wave signal reaches receive transducer Y after touching 90 degree of reflections of bodyi,
Because the relative position coordinates of each receive transducer are, it is known that therefore the coordinate of the touch body in Y-axis is Yi, in X-axis
Coordinate is：Xi=V*(ti-t0)-Yi；
When there is multiple touch bodies to touch, surface acoustic wave signal reaches receive transducer after touching 90 degree of reflections of body, wherein one
Individual receive transducer YjReceive multiple surface acoustic wave signals, due to each receive transducer relative position coordinates, it is known that because
This multiple touches coordinate of the body in Y-axis and is Yj, the coordinate in X-axis is respectively：
1st touch body：Xj1=V*(tj1-t0)-Yj；
2nd touch body：Xj2=V*(tj2-tj1)+Xj1, or Xj2=V*(tj2-t0)-Yj；
…………
N-th touch body：Xjn=V*(tjn-tj1)+Xj1, or Xjn=V*(tjn-t0)-Yj；Wherein V is the propagation of surface acoustic wave signal
Speed, t0Start the start time point of acoustic waves signal, t for transmitting transduceriFor receive transducer receives table first
The time point of face acoustic signals, tj1It is YjReceive the 1st time point of the surface acoustic wave signal of touch body, tj2It is YjReceive
2nd time point of the surface acoustic wave signal of touch body, tjnIt is YjReceive n-th time of the surface acoustic wave signal of touch body
Point.
At least provided with one group of transmitting transducer arrays in the X-axis, at least provided with one group of receive transducer battle array in the Y-axis
Row, since any one transmitting transducer, transmitting transducer acoustic waves signal are operated alone by radiating circuit successively,
Until all transmitting transducers were all driven once, then terminate one cycle；All receive transducers are controlled by receiving circuit
While receiving surface acoustic signals, or all receive transducers independent receiving surface acoustic signals successively are controlled by receiving circuit.
The sum of transmitting transducer is n, first transmitting transducer X in the transmitting transducer arrays1Persistently launch table
The start time point of face acoustic signals is t0, the time that each transmitting transducer continues acoustic waves signal is T, until
All transmitting transducers were all driven once to terminate one cycle afterwards, and receive transducer is from start time point t0Start reception table
Face acoustic signals, receiving surface acoustic signals are stopped after lasting n*T；
（n-1）* in T~n*T periods, n-th transmitting transducer XnContinue acoustic waves signal, body touch is touched when having
When, surface acoustic wave signal reaches receive transducer Y after touching 90 degree of reflections of bodyn, because each transmitting transducer and reception are changed
The relative position coordinates of energy device are, it is known that it is thus determined that the coordinate for touching body is（Xn, Yn）.
At least provided with one group of transmitting transducer arrays in the X-axis, changed by single reception at least provided with one in the Y-axis
The combination that energy device is formed with reflection strip array, since any one transmitting transducer, is operated alone successively by radiating circuit
Transmitting transducer acoustic waves signal, until all transmitting transducers were all driven once, then terminates one cycle；By
Receiving circuit controls receive transducer receiving surface acoustic signals.
The sum of transmitting transducer is n, first transmitting transducer X in the transmitting transducer arrays1Persistently launch table
The start time point of face acoustic signals is t0, the time that each transmitting transducer continues acoustic waves signal is T, until
All transmitting transducers were all driven once to terminate one cycle afterwards, and receive transducer is from start time point t0Start reception table
Face acoustic signals, receiving surface acoustic signals are stopped after lasting n*T；
（n-1）* in T~n*T periods, n-th transmitting transducer XnContinue acoustic waves signal, bodies are touched when there is multiple
During touch, surface acoustic wave signal reaches receive transducer after touching 90 degree of reflections of body, and receiving circuit receives the 1st surface sound
The time point of ripple signal is tn1, the 2nd time point of surface acoustic wave signal is received for tn2, receive m-th surface acoustic wave letter
Number time point be tnm, because the relative position coordinates of each transmitting transducer are, it is known that therefore multiple touches seats of the bodies in X-axis
Mark is Xn, the coordinate in Y-axis is respectively：
1st touch body：Yn1={V*{tn1-[t0+(n-1)T]}-Xn}/2,
2nd touch body：Yn2={V*{tn2-[t0+(n-1)T]}-Xn}/2,
…………
M-th touch body：Ynm={V*{tnm-[t0+(n-1)T]}-Xn}/2。
At least provided with a combination formed by single transmitting transducer and reflection strip array, the Y-axis in the X-axis
On at least provided with one group of receive transducer array, drive transmitting transducer to continue acoustic waves signal by radiating circuit；By
Receiving circuit controls all receive transducers receiving surface acoustic signals simultaneously, or controls all receive transducers by receiving circuit
Independent receiving surface acoustic signals successively.
When there is one to touch body touch, surface acoustic wave signal reaches receive transducer Y after touching 90 degree of reflections of bodyi,
Because the relative position coordinates of each receive transducer are, it is known that therefore the coordinate of the touch body in Y-axis is Yi, in X-axis
Coordinate is：Xi= [V*(ti-t0)-Yi]/2；
When there is multiple touch bodies to touch, surface acoustic wave signal reaches receive transducer after touching 90 degree of reflections of body, wherein one
Individual receive transducer YjReceive multiple surface acoustic wave signals, due to each receive transducer relative position coordinates, it is known that because
This multiple touches coordinate of the body in Y-axis and is Yj, the coordinate in X-axis is respectively：
1st touch body：Xj1=[V*(tj1-t0)-Yj]/2；
2nd touch body：Xj2=[V*(tj2-tj1)]/2+Xj1, or Xj2=[V*(tj2-t0)-Yj]/2；
…………
N-th touch body：Xjn=[V*(tjn-tj1)]/2+Xj1, or Xjn=[V*(tjn-t0)-Yj]/2。
One group of transmitting transducer arrays and one group of receive transducer are respectively provided with a wherein edge of the X-axis or Y-axis
Array, all transmitting transducers acoustic waves signal simultaneously is driven by radiating circuit；All receptions are controlled by receiving circuit
Transducer receiving surface acoustic signals simultaneously, or control all receive transducers independent receiving surface sound wave successively by receiving circuit
Signal.
When there is one to touch body touch, surface acoustic wave signal reaches receive transducer Y through touching after body 180 degree reflectsi,
Because the relative position coordinates of each receive transducer are, it is known that therefore the coordinate of the touch body in Y-axis is Yi, in X-axis
Coordinate is：Xi= V*(ti-t0)/2；
When there is multiple touch bodies to touch, surface acoustic wave signal reaches receive transducer through touching after body 180 degree reflects, wherein one
Individual receive transducer YjReceive multiple surface acoustic wave signals, due to each receive transducer relative position coordinates, it is known that because
This multiple touches coordinate of the body in Y-axis and is Yj, the coordinate in X-axis is respectively：
1st touch body：Xj1=V*(tj1-t0)/2；
2nd touch body：Xj2=V*(tj2-tj1)/2+Xj1, or Xj2=V*(tj2-t0)/2；
…………
N-th touch body：Xjn= [V*(tjn-tj1)]/2+Xj1, or Xjn=V*(tjn-t0)/2。
One group of transmitting transducer arrays and one group of receive transducer are respectively provided with a wherein edge of the X-axis or Y-axis
Array, since any one transmitting transducer, transmitting transducer acoustic waves letter is operated alone by radiating circuit successively
Number, until all transmitting transducers were all driven once, then terminate one cycle；All reception transducings are controlled by receiving circuit
Device receiving surface acoustic signals simultaneously, or independent receiving surface sound wave is believed successively to control all receive transducers by receiving circuit
Number.
The sum of transmitting transducer is n, first transmitting transducer X in the transmitting transducer arrays1Persistently launch table
The start time point of face acoustic signals is t0, the time that each transmitting transducer continues acoustic waves signal is T, until
All transmitting transducers were all driven once to terminate one cycle afterwards, and receive transducer is from start time point t0Start reception table
Face acoustic signals, receiving surface acoustic signals are stopped after lasting n*T；
（n-1）* in T~n*T periods, n-th transmitting transducer XnContinue acoustic waves signal, body is touched when there is one
During touch, surface acoustic wave signal reaches receive transducer Y through touching after body 180 degree reflectsn, due to each transmitting transducer and connecing
The relative position coordinates of transducer are received, it is known that it is thus determined that the coordinate of the touch body is（Xn, Yn）；Touched when there are multiple bodies that touch
When, multiple touches coordinate of the body in X-axis and is Xn, the coordinate in Y-axis is respectively：
1st touch body：Yj1=V*(tj1-t0)/2；
2nd touch body：Yj2=V*(tj2-tj1)/2+Yj1, or Yj2=V*(tj2-t0)/2；
…………
N-th touch body：Yjn=[V*(tjn-tj1)]/2+Yj1, or Yjn=V*(tjn-t0)/2。
One group of transmitting transducer arrays and one are respectively provided with a wherein edge of the X-axis or Y-axis by single reception
The combination that transducer is formed with reflection strip array, since any one transmitting transducer, is individually driven successively by radiating circuit
Dynamic transmitting transducer acoustic waves signal, until all transmitting transducers were all driven once, then terminates one cycle；
Receive transducer receiving surface acoustic signals are controlled by receiving circuit.
The sum of transmitting transducer is n, first transmitting transducer X in the transmitting transducer arrays1Persistently launch table
The start time point of face acoustic signals is t0, the time that each transmitting transducer continues acoustic waves signal is T, until
All transmitting transducers were all driven once to terminate one cycle afterwards, and receive transducer is from start time point t0Start reception table
Face acoustic signals, receiving surface acoustic signals are stopped after lasting n*T；
（n-1）* in T~n*T periods, n-th transmitting transducer XnContinue acoustic waves signal, bodies are touched when there is multiple
During touch, surface acoustic wave signal reaches receive transducer through touching after body 180 degree reflects, and receiving circuit receives the 1st surface
The time point of acoustic signals is tn1, the 2nd time point of surface acoustic wave signal is received for tn2, receive m-th surface acoustic wave
The time point of signal is tnm, because the relative position coordinates of each transmitting transducer are, it is known that therefore multiple bodies that touch are in X-axis
Coordinate is Xn, the coordinate in Y-axis is respectively：
1st touch body：Yn1= V*{{tn1-[t0+(n-1)T]}-Xn}/2,
2nd touch body：Yn2={V*{tn2-[t0+(n-1)T]}-Xn}/2,
…………
M-th touch body：Ynm={V*{tnm-[t0+(n-1)T]}-Xn}/2。
One group of receive transducer array and one are respectively provided with a wherein edge of the X-axis or Y-axis by single transmitting
The combination that transducer is formed with reflection strip array, drives transmitting transducer to continue acoustic waves signal by radiating circuit；
All receive transducers receiving surface acoustic signals simultaneously are controlled by receiving circuit, or all reception transducings are controlled by receiving circuit
Device independent receiving surface acoustic signals successively.
When there is one to touch body touch, surface acoustic wave signal reaches receive transducer Y through touching after body 180 degree reflectsi,
Because the relative position coordinates of each receive transducer are, it is known that therefore the coordinate of the touch body in Y-axis is Yi, in X-axis
Coordinate is：Xi= [V*(ti-t0)-Yi]/2；
When there is multiple touch bodies to touch, surface acoustic wave signal reaches receive transducer through touching after body 180 degree reflects, wherein one
Individual receive transducer YjReceive multiple surface acoustic wave signals, due to each receive transducer relative position coordinates, it is known that because
This multiple touches coordinate of the body in Y-axis and is Yj, the coordinate in X-axis is respectively：
1st touch body：Xj1=[V*(tj1-t0)-Yj]/2；
2nd touch body：Xj2=[V*(tj2-tj1)+Xj1]/2, or Xj2= [V*(tj2-t0)-Yj]/2；
…………
N-th touch body：Xjn=[V*(tjn-tj1)+Xj1]/2, or Xjn=[V*(tjn-t0)-Yj]/2。
One group of transmitting transducer arrays and one group of receive transducer are respectively provided with a wherein edge of the X-axis or Y-axis
One group of transmitting transducer arrays and one group of receive transducer battle array are respectively provided with a wherein edge of array, the Y-axis or X-axis
Row.
Receive transducer array in the X-axis or Y-axis is formed by single receive transducer and reflection strip array
Combination is arranged on the transmitting terminal of surface acoustic wave signal.
In acoustic waves signal, remaining transmitting transducer does not work any one described transmitting transducer.
Using the advantage of the invention is that：
First, the present invention in X-axis or Y-axis at least provided with one group of transmitting transducer arrays formed by multiple transmitting transducers, or
At least provided with one group of receive transducer array formed by multiple receive transducers, due to transmitting transducer or receive transducer
Relative position coordinates are, it is known that therefore the structure can not only effectively tell multiple true touch points for touching body, additionally it is possible to
It is quick to determine multiple coordinates for touching bodies in X-axis or in Y-axis, terrible point has been inherently eliminated, realize and the above at 2 points
Multiple spot actual touch is responded, and has been truly realized the unlimited touch in touch area and has been responded；With China Patent No.
" 200920298621.7 " be representative prior art in compare, design of the invention is simple, the letter that surface acoustic wave touch screen is received
It is number strong, stable performance is touched, filtering and Dolby circuit design that matching circuit design need not be complicated not only simplify
The Material Cost of circuit, also reduces the design difficulty of printed circuit；The component low cost that the present invention is used simultaneously, produces work
Skill is ripe, produces surface acoustic wave touch screen with being conducive to stable mass.
2nd, in the present invention, transmitting transducer arrays are conducive to raising table by the way of acoustic waves signal simultaneously
The intensity of face acoustic signals, simplifies the design of radiating circuit switch and reduces many valve chip demands；Transmitting transducer arrays are adopted
With the mode of independent acoustic waves signal successively, can effectively reduce it is multiple touch between bodies interfere, improve and touch letter
Number stability, can not only reduce energy consumption, additionally it is possible to extend the service life of transmitting transducer；Receive transducer array is using same
When receiving surface acoustic signals mode, the time of receiving surface acoustic signals can be reduced, be conducive to improve touch-responsive speed
Degree；And receive transducer can reduce the interference of surface acoustic wave signal by the way of timesharing receiving surface acoustic signals, favorably
Stability is touched in improving.
3rd, in the present invention, using the combination acoustic waves formed by single transmitting transducer and reflection strip array
Signal, by receive transducer array received surface acoustic wave signal, or uses transmitting transducer arrays acoustic waves signal,
By the combination receiving surface acoustic signals formed by single receive transducer and reflection strip array, can efficiently identify
While multiple point touching, transducer usage quantity is also reduced, reduce production cost, particularly can quickly positioned and be changed from transmitting
The coordinate of the near touch body of energy device, improves touch-responsive speed.
4th, in the present invention, in perpendicular two side of touch-screen body, one group of transmitting transducing is respectively provided with each edge
Device array and one group of receive transducer array, it is possible to increase the intensity of surface acoustic wave signal, and built in whole touch-screen body surface face
Uniform acoustic wavefield is found, is conducive to improving the stability for touching；Surface acoustic wave signal is stronger simultaneously, is more conducive to touch function steady
Qualitatively lifted, and touching intensity（Abbreviation touch feeling）Also it is lighter；It is designed to be inherently eliminated terrible point using this, from
And improve the accuracy of touch point location determination；And two groups of receive transducer arrays then cause that the detection of surface acoustic wave signal is cleverer
Quick, testing result is more accurate.
5th, in the present invention, receive transducer array in the X-axis or Y-axis or by single receive transducer and reflection bar
The combination that line array is formed is arranged on the transmitting terminal of surface acoustic wave signal, and this structure advantageously reduces reflecting rear face acoustic signals
Propagation path, reduce surface acoustic wave signal decay.
6th, in the present invention, in acoustic waves signal, remaining launches transducing to any one described transmitting transducer
Device does not work, can either reducing energy consumption, energy saving can reduce the working time of transmitting transducer, be conducive to extension table again
The service life of face acoustic wave touching screen.
7th, in the present invention, when there is touch body to touch, the surface acoustic wave signal that receiving circuit will be received is converted into data
Bag, just packet to receive time-sequencing, temporally the cycle be sent to CPU MCU, CPU MCU systems
Raise treatment each drive circuit launch time, reception time of surface acoustic wave signal etc., can accomplish edge emitting, while receiving, while at
Reason, can effectively shorten the stand-by period, improve the response speed of surface acoustic wave touch screen.
Brief description of the drawings
Fig. 1 is the fundamental diagram of the embodiment of the present invention 1.
Fig. 2 is the workflow diagram of the embodiment of the present invention 1.
Fig. 3 is the structural representation of the embodiment of the present invention 1.
Fig. 4 is the working time figure of emission shaft in the embodiment of the present invention 1.
Fig. 5 is the working time figure of receive axle in the embodiment of the present invention 1.
Fig. 6 is the circuit block diagram of the embodiment of the present invention 1.
Fig. 7 is the fundamental diagram of the embodiment of the present invention 2.
Fig. 8 is the workflow diagram of the embodiment of the present invention 2.
Fig. 9 is the operating diagram of the embodiment of the present invention 2.
Figure 10 is the working time figure of emission shaft in the embodiment of the present invention 2.
Figure 11 is the working time figure of receive axle in the embodiment of the present invention 2.
Figure 12 is the fundamental diagram of the embodiment of the present invention 3.
Figure 13 is the workflow diagram of the embodiment of the present invention 3.
Figure 14 is the structural representation of the embodiment of the present invention 3.
Figure 15 is the working time figure of emission shaft in the embodiment of the present invention 3.
Figure 16 is the working time figure of receive axle in the embodiment of the present invention 3.
Figure 17 is the structural representation of the embodiment of the present invention 4.
Figure 18 is the working time figure of emission shaft in the embodiment of the present invention 4.
Figure 19 is the working time figure of receive axle in the embodiment of the present invention 4.
Figure 20 is the structural representation of the embodiment of the present invention 5.
Figure 21 is the structural representation of the embodiment of the present invention 6.
Figure 22 is the structural representation of the embodiment of the present invention 7.
Figure 23 is the structural representation of the embodiment of the present invention 8.
Mark in figure for：1st, touch-screen body, 2, receive transducer, 3, reflection strip array, 4, transmitting transducer arrays,
5th, receive transducer array, 6, transmitting transducer.
Specific embodiment
Embodiment 1
A kind of multiple spot actual touch method of surface acoustic wave touch screen, comprises the following steps：
（1）, in X-axis or Y-axis at least provided with one group of transmitting transducer arrays 4 formed by multiple transmitting transducers 6, or at least
One group of receive transducer array 5 formed by multiple receive transducers 2 is set；
（2）, by radiating circuit drive the acoustic waves signal of transmitting transducer 6, by receiving circuit control receive transducer 2 connect
Receive surface acoustic wave signal；
（3）, when have touch body touch when, surface acoustic wave signal through touch body after reach receive transducer 2, work as surface acoustic wave signal
When intensity is more than the threshold values for setting, receiving circuit sends to CPU MCU the surface acoustic wave signal, and center treatment is single
First MCU determines to touch the coordinate of body.
Further, when without body touch is touched, CPU MCU does not make any treatment.
In the present embodiment, when there is touch body to touch, high density, the surface acoustic wave signal of high-energy occur thoroughly through touching body
Penetrate, scatter, reflect and reflect, wherein the energy for reflecting be divided into after 180 degree reflection backtracking on transmitting transducer 6,90 degree
The vertical axle is reached after axle and other angle reflections vertical with emission shaft are reached after reflection, but is shown by test,
Because most short from the vertical range for touching body arrival emission shaft or the axle vertical with emission shaft, 90 degree of energy intensities of reflection
Energy is maximum on the axle vertical with emission shaft, while the energy intensity of 180 degree reflection is on the emission shaft
Energy is also maximum, therefore when threshold values of the surface acoustic wave signal intensity that receiving circuit is received more than setting, receives electricity
Road sends to CPU MCU the surface acoustic wave signal, and CPU MCU determines to touch the coordinate of body.
In the present embodiment, the transmitting transducer arrays 4 refer to by multiple transmitting transducers 6 in X-axis or Y-axis by straight line
Order is arranged, and the transmitting transducer 6 in the transmitting transducer arrays 4 is arranged in parallel；The receive transducer array 5 refer to by
Multiple receive transducers 2 are arranged in Y-axis or X-axis by linear sequence, the receive transducer 2 in the receive transducer array 5
It is arranged in parallel.
In the present embodiment, replaced now with single receive transducer 2 and reflection bar in technology using receive transducer array 5
The combining structure that line array 3 is formed, using the replacement of transmitting transducer arrays 4 now with single transmitting transducer 6 in technology and instead
The combining structure of the formation of striped array 3 is penetrated, terrible point can be inherently eliminated, realize the multiple spot actual touch sound of the and above at 2 points
Should.
In the present embodiment, one group of transmitting transducer arrays 4 is preferably set in the X-axis, one group is set in the Y-axis
Receive transducer array 5, the acoustic waves signal simultaneously of all transmitting transducers 6 is driven by radiating circuit；By receiving circuit
The receiving surface acoustic signals simultaneously of all receive transducers 2 are controlled, or controls all receive transducers 2 single successively by receiving circuit
Only receiving surface acoustic signals；But above-mentioned preferred arrangement is not limited to, for example, two groups of transmittings can be set in X-axis and changed
Energy device array 4, sets two groups of receive transducer arrays 5 in Y-axis.
When there is one to touch body touch, surface acoustic wave signal reaches receive transducer Y after touching 90 degree of reflections of bodyi,
Because the relative position coordinates of each receive transducer 2 are, it is known that therefore the coordinate of the touch body in Y-axis is Yi, in X-axis
Coordinate is：Xi=V*(ti-t0)-Yi；
When there is multiple touch bodies to touch, surface acoustic wave signal reaches receive transducer 2 after touching 90 degree of reflections of body, wherein one
Individual receive transducer YjReceive multiple surface acoustic wave signals, due to each receive transducer 2 relative position coordinates, it is known that because
This multiple touches coordinate of the body in Y-axis and is Yj, the coordinate in X-axis is respectively：
1st touch body：Xj1=V*(tj1-t0)-Yj；
2nd touch body：Xj2=V*(tj2-t j1)+Xj1, or Xj2=V*(tj2-t0)-Yj；
…………
N-th touch body：Xjn=V*(tjn-tj1)+Xj1, or Xjn=V*(tjn-t0)-Yj；Wherein V is the propagation of surface acoustic wave signal
Speed, t0Start the start time point of acoustic waves signal, t for transmitting transducer 6iFor receive transducer 2 is received first
The time point of surface acoustic wave signal, tj1It is YjReceive the 1st time point of the surface acoustic wave signal of touch body, tj2It is YjReceive
To the 2nd time point of the surface acoustic wave signal of touch body, tjnIt is YjReceive n-th surface acoustic wave signal of touch body when
Between point.
In the present embodiment, as shown in figure 1, T ' is the surface sound received by CPU MCU treatment receiving circuits
When the time T that the time of ripple signal, i.e. transmitting transducer 6 continue acoustic waves signal is zero, stop acoustic waves
Signal, CPU MCU processes the surface acoustic wave signal received by receiving circuit in time T '.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, differs primarily in that：One group of transmitting transducer arrays 4 is set in the X-axis,
One group of receive transducer array 5 is set in the Y-axis, it is independent successively by radiating circuit since any one transmitting transducer 6
The acoustic waves signal of transmitting transducer 6 is driven, until all transmitting transducers 6 were all driven once, is then terminated once
Circulation；The receiving surface acoustic signals simultaneously of all receive transducers 2 are controlled by receiving circuit, or all connecing is controlled by receiving circuit
Receive the independent receiving surface acoustic signals successively of transducer 2；Above-mentioned set-up mode is preferred, but is not limited to above-mentioned being preferably provided with
Mode, for example, can set one group of transmitting transducer arrays 4 in X-axis, and two groups of receive transducer arrays 5 are set in Y-axis.
Further, the sum of transmitting transducer 6 is n, first transmitting transducer X in the transmitting transducer arrays 41
The start time point for continuing acoustic waves signal is t0, the lasting acoustic waves signal of each transmitting transducer 6
Time is T, and one cycle was once terminated afterwards until all transmitting transducers 6 are all driven, and receive transducer 2 is from initial time
Point t0Start receiving surface acoustic signals, receiving surface acoustic signals are stopped after lasting n*T；
（n-1）* in T~n*T periods, n-th transmitting transducer XnContinue acoustic waves signal, body touch is touched when having
When, surface acoustic wave signal reaches receive transducer Y after touching 90 degree of reflections of bodyn, because each transmitting transducer 6 and reception are changed
The relative position coordinates of energy device 2 are, it is known that it is thus determined that the coordinate for touching body is（Xn, Yn）.
The operation principle of the present embodiment is：Transmitting transducer 6 first in setting transmitting transducer arrays 4 presses X successively1、
X2、X3……XmArrangement, the receive transducer 2 in receive transducer array 5 presses Y successively1、Y2、Y3……YnArrangement, then by sending out
Transmit-receive radio road is operated alone transmitting transducer X1Continue acoustic waves signal in setting time T, and start countdown, launch
Transducer X1Coordinate it is pre-recorded by CPU MCU, when have touch body and touch when, detect receive transducer Y1Connect
Whether the energy intensity of surface acoustic wave signal is received more than setting threshold values, if receive transducer Y1Received surface acoustic wave letter
Number energy intensity more than setting threshold values, then be judged to true value 1, indicates touch body, and recorded by CPU MCU and connect
Receive transducer Y1Coordinate, if receive transducer Y1The energy intensity of received surface acoustic wave signal is less than setting threshold values, then
It is judged to falsity 0, represents no touch body, CPU MCU does not do any record；Complete receive transducer Y1Detection
Afterwards, the detection of remaining receive transducer 2 is sequentially completed, until after the detection for completing all receive transducers 2, receiving circuit is by sound
The surface acoustic wave signal that ripple signal receiving assembly is received passes through A/D circuit conversions into packet, and adds the time to packet
Mark, then by packet, temporally the cycle is sent to CPU MCU treatment, true by CPU MCU
Surely the coordinate of touch body is（X1, Y1）, and so on carry out, until all of transmitting transducer 6 was all driven in X-axis, complete
After one cycle, receiving circuit stops receiving surface acoustic signals, the instruction that wait is circulated next time.
As shown in figure 9, CPU MCU drives transmitting transducer X by radiating circuit1When, surface acoustic wave is along Y
Direction of principal axis is propagated, and when touch body A is run into, high density, the surface acoustic wave signal of high-energy occur 90 degree of reflections through touching body A,
Except receive transducer Y8In addition, other receive transducers 2 are also different degrees of have received the energy that surface acoustic wave signal is reflected
Amount, but only receive transducer Y8The energy intensity of the surface acoustic wave signal for receiving terminates more than setting threshold values in Y-axis
After scanning, it may be determined that only one of which peak value Y in Y-axis8, then can be determined that with the presence of a true touch point, i.e.,（X1、Y8）.
After completing the surface acoustic wave signal detection of all receive transducers 2, radiating circuit stops driving transmitting transducer X1,
And transmitting transducer X is operated alone2, surface acoustic wave signal is propagated along Y direction, when touch body B and C is run into, surface sound
There are 90 degree of reflections in ripple signal, the Energy maximum value after reflection is respectively by Y through touching body5And Y3Receive, there is no the ground of touch point
Side is not in reflection, is naturally also received with regard to noenergy, after Y-axis terminates scanning, there is two peak value Y5And Y3, then can
To be determined with two true touch point presence, i.e.,（X2、Y5）With（X2、Y3）.
Radiating circuit stops driving transmitting transducer X2Afterwards, transmitting transducer X is operated alone3, surface acoustic wave signal is along Y
Direction of principal axis is propagated, but does not run into touch body, and the receive transducer array 5 of Y-axis does not all receive signal, therefore without peak value, X3
Without true touch point.
Radiating circuit stops driving transmitting transducer X3Afterwards, transmitting transducer X is operated alone4, surface acoustic wave signal is along Y
Direction of principal axis is propagated, and when touch body D, E and F is run into, 90 degree of Energy maximum values of reflection are respectively by Y5、Y7And Y9Receive, do not have
The place of touch point is not in reflection, although touching 90 degree of directions of body D with the presence of a touch body B, according to surface sound
Ripple transmission principle, 90% energy of surface acoustic wave signal is all transmission, therefore the presence of B does not interfere with 90 degree of reflected energies of D
Transmission, because the amplitude of the reflected energy of the Amplitude Ratio of 90 degree of reflected energies other angles is several times greater, therefore nor affect on it
The amplitude difference of his angle reflection energy.So after Y-axis terminates scanning, there is three peak value Y5、Y7And Y9, then can be determined that
With the presence of three true touch points, i.e.,（X4、Y5）、（X4、Y7）With（X4、Y9）.
Radiating circuit stops driving transmitting transducer X4Afterwards, transmitting transducer X is operated alone5, surface acoustic wave signal is along Y
Direction of principal axis is propagated, but does not run into touch body, and the receive transducer array 5 of Y-axis does not all receive signal, therefore without peak value, X5
Without true touch point.
Radiating circuit stops driving transmitting transducer X5Voltage after, transmitting transducer X is operated alone6, surface acoustic wave signal
Propagated along Y direction, when touch body G is run into, 90 degree of Energy maximum values of reflection are by Y3Receive, although touching body G's
90 degree of directions carry C with the presence of a touch, but do not influence the judgement of peak value, after Y-axis terminates scanning, there is a peak value Y3, because
This can be determined that with the presence of a true touch point, i.e.,（X6、Y3）.
Embodiment 3
The present embodiment is substantially the same manner as Example 2, differs primarily in that：One group of transmitting transducer arrays 4 is set in the X-axis,
One combination formed by single receive transducer 2 and reflection strip array 3 is set in the Y-axis, is changed from any one transmitting
Energy device 6 starts, and the acoustic waves signal of transmitting transducer 6 is operated alone successively by radiating circuit, until all transmitting transducings
Device 6 was all driven once, then terminate one cycle；The receiving surface acoustic signals of receive transducer 2 are controlled by receiving circuit；On
It is preferred to state set-up mode, but is not limited to above-mentioned preferred arrangement, for example, can be respectively provided with the two of X-axis sides
Two groups of transmitting transducer arrays 4, are respectively provided with two by single receive transducer 2 and reflection strip battle array on two sides of Y-axis
The combination that row 3 are formed.
Further, the sum of transmitting transducer 6 is n, first transmitting transducer X in the transmitting transducer arrays 41
The start time point for continuing acoustic waves signal is t0, the lasting acoustic waves signal of each transmitting transducer 6
Time is T, and one cycle was once terminated afterwards until all transmitting transducers 6 are all driven, and receive transducer 2 is from initial time
Point t0Start receiving surface acoustic signals, receiving surface acoustic signals are stopped after lasting n*T；
（n-1）* in T~n*T periods, n-th transmitting transducer XnContinue acoustic waves signal, bodies are touched when there is multiple
During touch, surface acoustic wave signal reaches receive transducer 2 after touching 90 degree of reflections of body, and receiving circuit receives the 1st surface
The time point of acoustic signals is tn1, the 2nd time point of surface acoustic wave signal is received for tn2, receive m-th surface acoustic wave
The time point of signal is tnm, because the relative position coordinates of each transmitting transducer 6 are, it is known that therefore multiple bodies that touch are in X-axis
Coordinate be Xn, the coordinate in Y-axis is respectively：
1st touch body：Yn1={V*{tn1-[t0+(n-1)T]}-Xn}/2,
2nd touch body：Yn2={V*{tn2-[t0+(n-1)T]}-Xn}/2,
…………
M-th touch body：Ynm={V*{tnm-[t0+(n-1)T]}-Xn}/2。
The operation principle of the present embodiment is essentially identical with the operation principle of embodiment 2, differs primarily in that：To any one
Transmitting transducer XiWhen being driven, transmitting transducer XiThe surface acoustic wave signal of transmitting is parallel to Y direction, transmitting transducer
XiOn touch body make surface acoustic wave signal produce 90 degree reflect after propagate to reflection strip array 3, after reflected striped array 3
Surface acoustic wave signal is conducted to receive transducer 2 after there are 90 degree of deflections, then unifies to carry out acoustic-electric turn by receive transducer 2
Change.Obviously, all surface acoustic signals all live through one section by X after being reflected through 90 degreeiVertically between reflection strip array 3
Distance, after being turned to for 3 two times by reflection strip array, the surface acoustic wave signal near receive transducer 2 is arrived first difference only
Up to receive transducer 2, away from receive transducer 2 is reached after the surface acoustic wave signal of receive transducer 2, the present embodiment is eliminated and connect
Transducer array 5 is received, the production cost of surface acoustic wave touch screen is reduced, is conducive to mass production.
Embodiment 4
The present embodiment is substantially the same manner as Example 1, differs primarily in that：One is set in the X-axis by single receive transducer 2
The combination formed with reflection strip array 3, sets one group of receive transducer array 5 in the Y-axis, driven by radiating circuit and launched
Transducer 6 continues acoustic waves signal；Receiving surface sound wave is believed simultaneously to control all receive transducers 2 by receiving circuit
Number, or the independent receiving surface acoustic signals successively of all receive transducers 2 are controlled by receiving circuit；Above-mentioned set-up mode is excellent
Choosing, but above-mentioned preferred arrangement is not limited to, for example two can be respectively provided with by single reception on the two of X-axis sides
The combination that transducer 2 is formed with reflection strip array 3, can be respectively provided with two groups of receive transducer battle arrays on the two of Y-axis sides
Row 5.
Further, when there is one to touch body touch, surface acoustic wave signal is reached after touching 90 degree of reflections of body and received
Transducer Yi, because the relative position coordinates of each receive transducer 2 are, it is known that therefore the coordinate of the touch body in Y-axis is Yi,
Coordinate in X-axis is：Xi= [V*(ti-t0)-Yi]/2；
When there is multiple touch bodies to touch, surface acoustic wave signal reaches receive transducer 2 after touching 90 degree of reflections of body, wherein one
Individual receive transducer YjReceive multiple surface acoustic wave signals, due to each receive transducer 2 relative position coordinates, it is known that because
This multiple touches coordinate of the body in Y-axis and is Yj, the coordinate in X-axis is respectively：
1st touch body：Xj1=[V*(tj1-t0)-Yj]/2；
2nd touch body：Xj2=[V*(tj2-tj1)]/2+Xj1, or Xj2=[V*(tj2-t0)-Yj]/2；
…………
N-th touch body：Xjn=[V*(tjn-tj1)]/2+Xj1, or Xjn=[V*(tjn-t0)-Yj]/2。
Embodiment 5
The present embodiment is substantially the same manner as Example 1, differs primarily in that：It is respectively provided with a wherein edge of the X-axis or Y-axis
One group of transmitting transducer arrays 4 and one group of receive transducer array 5, drive all transmitting transducers 6 to send out simultaneously by radiating circuit
Reflective surface acoustic signals；The receiving surface acoustic signals simultaneously of all receive transducers 2 are controlled by receiving circuit, or by receiving circuit
Control the independent receiving surface acoustic signals successively of all receive transducers 2.
Further, preferred forms are that receive transducer array 5 is parallel with transmitting transducer arrays 4, and reception is changed
Energy device array 5 is arranged on the transmitting terminal of surface acoustic wave signal.
When there is one to touch body touch, surface acoustic wave signal reaches receive transducer Y through touching after body 180 degree reflectsi,
Because the relative position coordinates of each receive transducer 2 are, it is known that therefore the coordinate of the touch body in Y-axis is Yi, in X-axis
Coordinate is：Xi= V*(ti-t0)/2；
When there is multiple touch bodies to touch, surface acoustic wave signal reaches receive transducer 2 through touching after body 180 degree reflects, wherein
One receive transducer YjReceive multiple surface acoustic wave signals, due to each receive transducer 2 relative position coordinates, it is known that
Therefore multiple coordinates for touching body in Y-axis are Yj, the coordinate in X-axis is respectively：
1st touch body：Xj1=V*(tj1-t0)/2；
2nd touch body：Xj2=V*(tj2-tj1)/2+Xj1, or Xj2=V*(tj2-t0)/2；
…………
N-th touch body：Xjn= [V*(tjn-tj1)]/2+Xj1, or Xjn=V*(tjn-t0)/2。
Embodiment 6
The present embodiment is substantially the same manner as Example 5, differs primarily in that：It is respectively provided with a wherein edge of the X-axis or Y-axis
One group of transmitting transducer arrays 4 and one group of receive transducer array 5, since any one transmitting transducer 6, by radiating circuit
The acoustic waves signal of transmitting transducer 6 is operated alone successively, until all transmitting transducers 6 were all driven once, then
Terminate one cycle；The receiving surface acoustic signals simultaneously of all receive transducers 2 are controlled by receiving circuit, or by receiving circuit control
Make the independent receiving surface acoustic signals successively of all receive transducers 2.
The sum of transmitting transducer 6 is n, first transmitting transducer X in the transmitting transducer arrays 41Lasting transmitting
The start time point of surface acoustic wave signal is t0, the time that each transmitting transducer 6 continues acoustic waves signal is T,
Once terminated one cycle afterwards until all transmitting transducers 6 are all driven, receive transducer 2 is from start time point t0Start
Receiving surface acoustic signals, receiving surface acoustic signals are stopped after lasting n*T；
（n-1）* in T~n*T periods, n-th transmitting transducer XnContinue acoustic waves signal, body is touched when there is one
During touch, surface acoustic wave signal reaches receive transducer Y through touching after body 180 degree reflectsn, due to each He of transmitting transducer 6
The relative position coordinates of receive transducer 2 are, it is known that it is thus determined that the coordinate of the touch body is（Xn, Yn）；Touched when there are multiple bodies that touch
When touching, multiple touches coordinate of the body in X-axis and is Xn, the coordinate in Y-axis is respectively：
1st touch body：Yj1=V*(tj1-t0)/2；
2nd touch body：Yj2=V*(tj2-tj1)/2+Yj1, or Yj2=V*(tj2-t0)/2；
…………
N-th touch body：Yjn=[V*(tjn-tj1)]/2+Yj1, or Yjn=V*(tjn-t0)/2。
Embodiment 7
The present embodiment is substantially the same manner as Example 6, differs primarily in that：It is respectively provided with a wherein edge of the X-axis or Y-axis
The combination that one group of transmitting transducer arrays 4 and one are formed by single receive transducer 2 and reflection strip array 3, from any one
Individual transmitting transducer 6 starts, and the acoustic waves signal of transmitting transducer 6 is operated alone successively by radiating circuit, until all
Transmitting transducer 6 was all driven once, then terminate one cycle；The receiving surface sound of receive transducer 2 is controlled by receiving circuit
Ripple signal.
Further, preferred forms are that the combination formed with reflection strip array 3 by single receive transducer 2 sets
Put the transmitting terminal in surface acoustic wave signal.
The sum of transmitting transducer 6 is n, first transmitting transducer X in the transmitting transducer arrays 41Lasting transmitting
The start time point of surface acoustic wave signal is t0, the time that each transmitting transducer 6 continues acoustic waves signal is T,
Once terminated one cycle afterwards until all transmitting transducers 6 are all driven, receive transducer 2 is from start time point t0Start
Receiving surface acoustic signals, receiving surface acoustic signals are stopped after lasting n*T；
（n-1）* in T~n*T periods, n-th transmitting transducer XnContinue acoustic waves signal, bodies are touched when there is multiple
During touch, surface acoustic wave signal reaches receive transducer 2 through touching after body 180 degree reflects, and receiving circuit receives the 1st surface
The time point of acoustic signals is tn1, the 2nd time point of surface acoustic wave signal is received for tn2, receive m-th surface acoustic wave
The time point of signal is tnm, because the relative position coordinates of each transmitting transducer 6 are, it is known that therefore multiple bodies that touch are in X-axis
Coordinate be Xn, the coordinate in Y-axis is respectively：
1st touch body：Yn1= V*{{tn1-[t0+(n-1)T]}-Xn}/2,
2nd touch body：Yn2={V*{tn2-[t0+(n-1)T]}-Xn}/2,
…………
M-th touch body：Ynm={V*{tnm-[t0+(n-1)T]}-Xn}/2。
Embodiment 8
The present embodiment is substantially the same manner as Example 5, differs primarily in that：It is respectively provided with a wherein edge of the X-axis or Y-axis
One group of receive transducer array 5 and a combination formed by single transmitting transducer 6 and reflection strip array 3, by transmitting electricity
Road drives transmitting transducer 6 to continue acoustic waves signal；The reception table simultaneously of all receive transducers 2 is controlled by receiving circuit
Face acoustic signals, or the independent receiving surface acoustic signals successively of all receive transducers 2 are controlled by receiving circuit.
Further, preferred forms are that receive transducer array 5 is arranged on the direction of the launch of surface acoustic wave signal.
When there is one to touch body touch, surface acoustic wave signal reaches receive transducer Y through touching after body 180 degree reflectsi,
Because the relative position coordinates of each receive transducer 2 are, it is known that therefore the coordinate of the touch body in Y-axis is Yi, in X-axis
Coordinate is：Xi= [V*(ti-t0)-Yi]/2；
When there is multiple touch bodies to touch, surface acoustic wave signal reaches receive transducer 2 through touching after body 180 degree reflects, wherein
One receive transducer YjReceive multiple surface acoustic wave signals, due to each receive transducer 2 relative position coordinates, it is known that
Therefore multiple coordinates for touching body in Y-axis are Yj, the coordinate in X-axis is respectively：
1st touch body：Xj1=[V*(tj1-t0)-Yj]/2；
2nd touch body：Xj2= [V*(tj2-tj1)+Xj1]/2, or Xj2= [V*(tj2-t0)-Yj]/2；
…………
N-th touch body：Xjn=[V*(tjn-tj1)+Xj1]/2, or Xjn=[V*(tjn-t0)-Yj]/2。
Embodiment 9
The present embodiment is identical with any one embodiment in embodiment 5-8, differs primarily in that：The transmitting transducer arrays 4,
Combination that receive transducer array 5, single receive transducer 2 are formed with reflection strip array 3 or single transmitting transducer 6 with it is anti-
The combination of the formation of striped array 3 is penetrated, can be mutually combined while being arranged in X-axis and Y-axis.
Further,
In the present invention, involved single transmitting transducer 6 and reflection strip array 3 are formed in above-mentioned any one embodiment
Combination, transmitting transducer arrays 4 or receive transducer array that combination, single receive transducer 2 and reflection strip array 3 are formed
5, the back side of touch-screen body 1 is preferably provided at, touch surface is turned into a complete pure-surface.
It is described to be driven since any one transmitting transducer 6 in the present invention, until all transmitting transducers 6 are all driven
Moved refer to once with drive any one transmitting transducer 6 be reference, by from lower to upper or basipetal direction successively
Remaining transmitting transducer 6 is driven, wherein, any one transmitting transducer 6 in acoustic waves signal, change by remaining transmitting
Energy device 6 does not work.
Claims (3)
1. a kind of multiple spot actual touch method of surface acoustic wave touch screen, it is characterised in that comprise the following steps：
（1）, in X-axis or Y-axis at least provided with one group by multiple transmitting transducers（6）The transmitting transducer arrays of formation（4）, or
At least provided with one group by multiple receive transducers（2）The receive transducer array of formation（5）；
（2）, transmitting transducer driven by radiating circuit（6）Acoustic waves signal, receive transducer is controlled by receiving circuit
（2）Receiving surface acoustic signals；
（3）, when have touch body touch when, surface acoustic wave signal through touch body reflect after reach receive transducer（2）, when surface sound
When ripple signal intensity is more than the threshold values for setting, receiving circuit sends to CPU MCU, center the surface acoustic wave signal
Processing unit MCU determines to touch the coordinate of body；
At least provided with one group of transmitting transducer arrays in the X-axis（4）, changed by single reception at least provided with one in the Y-axis
Can device（2）With reflection strip array（3）The combination of formation, from any one transmitting transducer（6）Start, by radiating circuit successively
Transmitting transducer is operated alone（6）Acoustic waves signal, until all transmitting transducers（6）All driven once, then
Terminate one cycle；Receive transducer is controlled by receiving circuit（2）Receiving surface acoustic signals.
2. the multiple spot actual touch method of a kind of surface acoustic wave touch screen as claimed in claim 1, it is characterised in that：The hair
Penetrate transducer array（4）Middle transmitting transducer（6）Sum be n, first transmitting transducer X1Continue acoustic waves letter
Number start time point be t0, each transmitting transducer（6）The time for continuing acoustic waves signal is T, until all
Transmitting transducer（6）All driven and once terminated one cycle afterwards, receive transducer（2）From start time point t0Start to receive
Surface acoustic wave signal, receiving surface acoustic signals are stopped after lasting n*T；
（n-1）* in T~n*T periods, n-th transmitting transducer XnContinue acoustic waves signal, bodies are touched when there is multiple
During touch, surface acoustic wave signal reaches receive transducer after touching 90 degree of reflections of body（2）, receiving circuit receives the 1st table
The time point of face acoustic signals is tn1, the 2nd time point of surface acoustic wave signal is received for tn2, receive m-th surface sound
The time point of ripple signal is tnm, due to each transmitting transducer（6）Relative position coordinates, it is known that therefore multiple bodies that touch are in X
Coordinate on axle is Xn, the coordinate in Y-axis is respectively：
1st touch body：Yn1={V*{tn1-[t0+(n-1)T]}-Xn}/2,
2nd touch body：Yn2={V*{tn2-[t0+(n-1)T]}-Xn}/2,
…………
M-th touch body：Ynm={V*{tnm-[t0+(n-1)T]}-Xn}/2。
3. the multiple spot actual touch method of a kind of surface acoustic wave touch screen as claimed in claim 1, it is characterised in that：Described
Any one transmitting transducer（6）In acoustic waves signal, remaining transmitting transducer（6）Do not work.
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| CN201310235013.2A CN103472960B (en) | 2013-06-14 | 2013-06-14 | A kind of method realized in surface acoustic wave touch screen multiple spot actual touch |
| CN201710121204.4A CN106909257B (en) | 2013-06-14 | 2013-06-14 | A kind of multiple spot actual touch method of surface acoustic wave touch screen |
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| CN201310235013.2A Active CN103472960B (en) | 2013-06-14 | 2013-06-14 | A kind of method realized in surface acoustic wave touch screen multiple spot actual touch |
| CN201710121204.4A Active CN106909257B (en) | 2013-06-14 | 2013-06-14 | A kind of multiple spot actual touch method of surface acoustic wave touch screen |
| CN201710120570.8A Active CN106843604B (en) | 2013-06-14 | 2013-06-14 | Method for realizing multipoint real touch of acoustic touch screen |
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| CN110799931A (en) * | 2017-08-03 | 2020-02-14 | 三星电子株式会社 | Display device and control method thereof |
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| CN106293247B (en) * | 2016-09-05 | 2023-10-20 | 江苏特思达电子科技股份有限公司 | Surface acoustic wave touch screen and touch display system |
| CN107357470A (en) * | 2017-08-24 | 2017-11-17 | 成都睿联创想科技有限责任公司 | A kind of touch screen system based on surface acoustic wave technique |
| US10332543B1 (en) * | 2018-03-12 | 2019-06-25 | Cypress Semiconductor Corporation | Systems and methods for capturing noise for pattern recognition processing |
| TWI739651B (en) * | 2020-11-05 | 2021-09-11 | 華碩電腦股份有限公司 | Electronic device and touch control method thereof |
| CN115237270A (en) * | 2021-04-22 | 2022-10-25 | 华为技术有限公司 | Touch detection device, touch display screen and touch detection method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106843605A (en) | 2017-06-13 |
| CN106909257B (en) | 2019-07-05 |
| CN106843605B (en) | 2019-09-27 |
| CN103472960A (en) | 2013-12-25 |
| CN106843604A (en) | 2017-06-13 |
| CN106886343A (en) | 2017-06-23 |
| CN103472960B (en) | 2017-06-06 |
| CN106886343B (en) | 2019-12-24 |
| CN106843604B (en) | 2019-12-24 |
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