CN203366300U - Multipoint true touch surface sound wave touch screen - Google Patents
Multipoint true touch surface sound wave touch screen Download PDFInfo
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- CN203366300U CN203366300U CN 201320342157 CN201320342157U CN203366300U CN 203366300 U CN203366300 U CN 203366300U CN 201320342157 CN201320342157 CN 201320342157 CN 201320342157 U CN201320342157 U CN 201320342157U CN 203366300 U CN203366300 U CN 203366300U
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Abstract
The utility model discloses a multipoint true touch surface sound wave touch screen which comprises a touch screen body and further comprises at least one set of transducer array which is formed by connecting a plurality of transducers in parallel. The transducer array is arranged on an X axis or a Y axis of the touch screen body to form a transmitting transducer array or a receiving transducer array, and a receiving array or a transmitting array is correspondingly arranged on the X axis or the Y axis of the touch screen body. The multipoint true touch surface sound wave touch screen achieves true touch response of two or more points, ghost points are thoroughly removed, and with the existing technology, the multipoint true touch surface sound wave touch screen can truly achieve infinite point touch response in a touch region.
Description
Technical field
The utility model relates to a kind of surface acoustic wave touch screen, relates in particular to a kind of surface acoustic wave touch screen of multiple spot actual touch.
Background technology
Current touch-screen mainly contains the types such as surface acoustic wave, infrared and electric capacity, the surface acoustic wave touch screen advantage such as resolution is high, the response time is short, environmental adaptation is strong owing to having, good stability, light transmission are good wherein, become the touch-screen of tool promotional value in several main flow touch-screens.
Existing general surface acoustic wave touching screen only has X-axis and two orthogonal physical positioning axles of Y-axis, can accurately identify a touch point and obtain unique one group of position coordinate data based on the axes intersect principle, but while operating for two or more touch points simultaneously, the combinatorial coordinates of three or four positions for example may appear during two touch points, the combinatorial coordinates of wherein one or two position is terrible point coordinate, causing the touch point of report is not real touch point, this just makes surface acoustic wave touch screen will lose efficacy when multiple spot touches simultaneously, greatly limited the development of surface acoustic wave touch screen.
Therefore, in prior art, proposed to start with and address the above problem from the software and hardware both direction respectively:
The first, from software, surface acoustic wave touch field touches firmware by upgrading, touches body and when entering touch area, adopts time-sharing approach or subregion method to realize that on software the touch point two point detects, and is called for short soft two point;
Wherein two touch bodies of time-sharing approach requirement must be in different time points when point touching is regional first, two time point intervals at least need to differ a touch-screen response time, as 10.4ms, after first touches body point touching zone, touch system has detected first true touch point, and record the true coordinate position of this touch point, behind second the touch any time point touching zone of body after 10.4ms, to I haven't seen you for ages, one or two coordinate axis data newly appear, an X coordinate or Y coordinate time for example newly appear, fixer system can be Y coordinate or the X coordinate of emerging X coordinate or Y coordinate matching disappearance automatically, the Y coordinate of described disappearance or X coordinate come from the coordinate axis data of X coordinate of new appearance or first touch body of Y coordinate time.If, with a stylish X coordinate and the Y coordinate of having occurred, fixer system is matched emerging X coordinate and Y coordinate automatically, has identified second real touch point.But being limited as when processing the 3rd touch body point touching zone of time-sharing approach, when the 3rd touch body is positioned at the first two touch body crossover location, occur without new X coordinate or Y coordinate data, causes the 3rd touch body of None-identified.
And the subregion method requires touch-screen is partitioned into to several zones physically, such as X-axis being divided into to a lot of zonules, enter the release respective regions by the judgement touch point, distinguish true point from ghost point, for example in prior art, touch bodies point touching zones simultaneously when two, and two touch points are during without identical X and Y coordinates axle, firmware can collect two X coordinates and two Y coordinates simultaneously, when X and Y pairing, there will be two terrible points, cause two actual positions that touch body of None-identified.But because the subregion method has gone out many zoness of different by the touch-screen physical segmentation, when the touch body is moved in touch area, tandem other zones that enters of meeting, two touch points, just can from ghost point, distinguish two true touch points by this front and back time difference, this principle still is similar to time-sharing approach.The critical defect of subregion method is None-identified multiple point touching in same subregion, the 3rd defect that touches body of None-identified still exists, for example two at first subregion touch the moment that body enters the second subregion simultaneously, the 3rd touches body and also clicks first at the moment the second subregion, because two touch points in the first subregion are None-identified, increased again the 3rd and touched body entering into second subregion moment, collect three different Y coordinates at the second subregion, two different X coordinates, six kinds of combinations are arranged during the fixer system coupling, wherein three kinds are combined as terrible point.
When in soft two point, the subregion method causes a plurality of touch body because of the imperfection on its principle from the above, error rate is higher, in time-sharing approach, except the time interval that many touches body is touched first, have requirement, it is very high that the effects on surface acoustic signals requires, cause surface acoustic wave touch screen realize in stable production more difficult.For example, when surface acoustic wave touch screen is made, especially large-sized surface acoustic wave touch screen, require the processing technology precision higher, striped serigraphy, baking temperature precision are higher, thereby increased manufacture difficulty, otherness between each surface acoustic wave touch screen is also larger simultaneously, causes the difficulty of steady production surface acoustic wave touch screen to increase.
Second, from hardware, China Patent No. " 200920298621.7 " discloses a kind of multi-point surface acoustic wave touch screen, its open day is on 09 08th, 2010, its technical scheme is that described multi-point surface acoustic wave touch screen comprises controller, X-axis locating device and Y-axis locating device, also comprise independently Z axis locating device, the Z axis locating device comprises two Z axis transmitting transducers that are arranged on the screen body, two Z axis receiving transducers, two groups of Z axis emission striped arrays and two groups of Z axis receive the striped array, two groups of Z axis emission striped arrays receive the striped array distribution with two groups of Z axis and become location to enclose at screen body quadrilateral, and screen body limit is parallel with corresponding Z axis emission striped array or Z axis reception striped array, the Z axis locating device forms Z axis, the X-axis locating device forms X-axis, the Y-axis locating device forms Y-axis, Z axis and X-axis and Y-axis intersect.
But increased the Z axis of an assisting sifting ghost point in this patent, can identify at most two physics touch bodies after increasing Z axis simultaneously, continue to increase by one group of U axle vertical with Z axis, can identify at most three physics simultaneously and touch body, therefore coordinate axis has the N group in theory, just can identify N-1 physics simultaneously and touch body, but increase coordinate axis group number and also need increase corresponding reflection strip array in touch-screen body surrounding, and surface acoustic wave signal is through too much producing a lot of hashs after group reflection strip array, and easily receiving transducer is received, thereby have a strong impact on fixer system coordinate identification point, demand is arranged in the space that increase many group reflection strip arrays needs wider touch-screen body surrounding to meet the reflection strip array simultaneously, the lightness of this and existing market demand, narrow limit, boundlessization and panelized touch-screen are opposing and speed, and also can't produce the surface acoustic wave touch screen of N group coordinate axis with existing processing technology.
The utility model content
The purpose of this utility model is to overcome the above-mentioned problems in the prior art, a kind of surface acoustic wave touch screen of multiple spot actual touch is provided, the utility model has been realized and above multiple spot actual touch response at 2, fundamentally eliminated terrible point, and with existing technique just can really accomplish touch area without the point of accumulation touch-responsive.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of surface acoustic wave touch screen of multiple spot actual touch, comprise the touch-screen body, it is characterized in that: also comprise that at least one group by a plurality of transducers transducer array formed in parallel, described transducer array is arranged on the X-axis of touch-screen body or Y-axis and forms transmitting transducer arrays or receiving transducer array, is provided with corresponding receiving array or emission array on Y-axis or X-axis.
Described receiving array is receiving transducer array or receiving transducer and the reflection strip array that coordinates with receiving transducer; Described emission array is transmitting transducer arrays or transmitting transducer and the reflection strip array that coordinates with transmitting transducer.
At least be provided with one group of transmitting transducer arrays on the X-axis of described touch-screen body, at least be provided with one group of receiving transducer array on Y-axis.
At least be provided with one group of transmitting transducer arrays on the X-axis of described touch-screen body, the reflection strip array that is provided with receiving transducer on Y-axis and coordinates with receiving transducer.
At least be provided with one group of receiving transducer array on the Y-axis of described touch-screen body, the reflection strip array that is provided with transmitting transducer on X-axis and coordinates with transmitting transducer.
Described transmitting transducer arrays and receiving array all are arranged on the back side of touch-screen body, or described receiving transducer array and emission array all are arranged on the back side of touch-screen body.
Employing the utility model has the advantage of:
One, the utility model at least arranges one group by a plurality of transducers transducer array formed in parallel on X-axis or Y-axis, be provided with corresponding receiving array or emission array on Y-axis or X-axis, X-axis is vertical with Y-axis, when the body of touch is arranged, surface acoustic wave signal occurs to arrive receiving transducer after 90 degree vertical reflections through touching body, because the relative position coordinates of each transducer in transducer array is known, therefore can determine fast that by this structure a plurality of touch bodies are at X-axis or the coordinate on Y-axis, and then just can determine that by CPU (central processing unit) MCU a plurality of touch bodies are at Y-axis or the coordinate on X-axis, fundamentally eliminated terrible point, and above multiple spot actual touch response have been realized at 2, really accomplished touch area without the point of accumulation touch-responsive, with China Patent No. " 200920298621.7 ", for the prior art of representative, compare, simplicity of design of the present utility model, the signal that surface acoustic wave touch screen receives is strong, touch stable performance, the circuit design matched does not need complicated filtering and Dolby circuit design, not only simplify the Material Cost of circuit, also reduced the design difficulty of P.e.c., the components and parts cost that the utility model is used simultaneously is low, and mature production technology is conducive to stable mass ground and produces surface acoustic wave touch screen.
Two, in the utility model, by transducer array, transmit and receive surface acoustic wave signal, can improve the intensity of surface acoustic wave signal, and set up uniform acoustic wavefield in whole touch-screen surface, be conducive to improve the stability touched; Surface acoustic wave signal is stronger simultaneously, more be conducive to the lifting of touch function stability, and touching intensity (abbreviation touch feeling) is also lighter; Adopt this design, according to the relative position coordinates of each transmitting transducer and receiving transducer, not only can fundamentally eliminate terrible point, can also determine fast the coordinate of a plurality of touch bodies, thereby improve the accuracy of judging touching body position.
Three, in the utility model, the emission array acoustic waves signal that employing is formed by single transmitting transducer and reflection strip array, by receiving transducer array received surface acoustic wave signal, or employing transmitting transducer arrays acoustic waves signal, by the receiving array receiving surface acoustic signals formed by single receiving transducer and reflection strip array, when can effectively identifying multiple point touching, also reduce the transducer usage quantity, reduced production cost, particularly can locate fast from the coordinate of the touch body close to transmitting transducer, improved touch-responsive speed.
Four, in the utility model, described transmitting transducer arrays and receiving array all are arranged on the back side of touch-screen body, or described receiving transducer array and emission array all are arranged on the back side of touch-screen body, this structure not only makes the touch face of touch-screen body become a complete pure-surface, also make surface acoustic wave touch screen can accomplish super narrow border structure, the maintenance of effects on surface acoustic wave touching screen and clean more convenient also has advantages of more attractive in appearance simultaneously.
The accompanying drawing explanation
The structural representation that Fig. 1 is the utility model embodiment 1.
The work schematic diagram that Fig. 2 is the utility model embodiment 1.
The structural representation that Fig. 3 is the utility model embodiment 5.
The structural representation that Fig. 4 is the utility model embodiment 6.
Being labeled as in figure: 1, touch-screen body, 2, receiving transducer, 3, the reflection strip array, 4, transmitting transducer arrays, 5, the receiving transducer array, 6, transmitting transducer.
Embodiment
A kind of surface acoustic wave touch screen of multiple spot actual touch, comprise touch-screen body 1, also comprise that at least one group by a plurality of transducers transducer array formed in parallel, described transducer array is arranged on the X-axis of touch-screen body 1 or Y-axis and forms transmitting transducer arrays 4 or receiving transducer array 5, is provided with corresponding receiving array or emission array on Y-axis or X-axis.
Further, described receiving array can be receiving transducer array 5, can be also receiving transducer 2 and reflection strip array 3, and receiving transducer 2 coordinates the receiving surface acoustic signals with reflection strip array 3; Described emission array can be transmitting transducer arrays 4, can be also transmitting transducer 6 and reflection strip array 3, and transmitting transducer 6 and reflection strip array 3 coordinate the acoustic waves signal.
The preferred implementation of the present embodiment is, at least is provided with one group of transmitting transducer arrays 4 on the X-axis of described touch-screen body 1, at least is provided with one group of receiving transducer array 5 on Y-axis; But for intensity and the touch sensitivity that strengthens surface acoustic wave signal, also two groups of transmitting transducer arrays 4 can be set on X-axis, two groups of receiving transducer arrays 5 are set on Y-axis.
The another preferred implementation of the present embodiment is, any one transmitting transducer 6 from transmitting transducer arrays 4 starts, drive separately successively transmitting transducer 6 acoustic waves signals by radiating circuit, until all transmitting transducers 6 all driven mistake once, finish once circulation; Control all receiving transducers 2 independent receiving surface acoustic signals successively by receiving circuit.
Further, described any one transmitting transducer 6 is when the acoustic waves signal, and all the other transmitting transducers 6 quit work, and are conducive to save energy consumption, extends the serviceable life of transmitting transducer 6.
In the present embodiment, when having the body of touch to touch, high density, high-octane surface acoustic wave signal is through touching body generation transmission, scattering, refraction and reflection, the energy wherein reflected is divided into 180 degree reflection Hou Yuan roads and turns back on transmitting transducer 6, arrive described vertical axle after arriving the axle vertical with emission shaft and other angle reflections after 90 degree reflections, but show through test, because from touching body, to arrive the vertical range of emission shaft or the axle vertical with emission shaft the shortest, so energy intensity energy on the described axle vertical with emission shaft of 90 degree reflections is maximum, the energy of energy intensity on described emission shaft of 180 degree reflections is also maximum simultaneously, therefore when with the perpendicular receiving axes of emission shaft on receiving transducer 2 while receiving the surface acoustic wave signal that is greater than setting threshold values intensity, receiving circuit is sent to CPU (central processing unit) MCU by this surface acoustic wave signal, by CPU (central processing unit) MCU according to known transducer coordinate, the launch time of surface acoustic wave signal and time of reception are determined the coordinate that touches body.
In the present embodiment, described transmitting transducer arrays 4 refers to by a plurality of transmitting transducers 6 and arranges by linear sequence on X-axis or Y-axis, and the transmitting transducer 6 in described transmitting transducer arrays 4 is arranged in parallel; Described receiving transducer array 5 refers to by a plurality of receiving transducers 2 and arranges by linear sequence on Y-axis or X-axis, and the receiving transducer 2 in described receiving transducer array 5 is arranged in parallel.
In the present embodiment, adopt receiving transducer array 5 to replace having now the unitized construction that in technology, single receiving transducer 2 and reflection strip array 3 form, adopt transmitting transducer arrays 4 to replace having now the unitized construction that in technology, single transmitting transducer 6 and reflection strip array 3 form, terrible point be can fundamentally eliminate, and above multiple spot actual touch response realized at 2.
The principle of work of the present embodiment is: at first set transmitting transducer 6 in transmitting transducer arrays 4 successively by X
1, X
2, X
3x
marrange, the receiving transducer 2 in receiving transducer array 5 is pressed Y successively
1, Y
2, Y
3y
narrange, then by radiating circuit, drive separately successively each transmitting transducer 6 to continue the acoustic waves signal in setting-up time T, open the receiving cable of receiving transducer 2 corresponding in receiving transducer array 5 simultaneously, and start countdown, drive at first separately transmitting transducer X
1, this transmitting transducer X
1coordinate pre-recorded by CPU (central processing unit) MCU, when having when touching body and touching, 90 degree reflections occur and arrive receiving transducers 2 in surface acoustic wave signal after touching body, detect receiving transducer Y
1whether the energy intensity of received surface acoustic wave signal is greater than the setting threshold values, if receiving transducer Y
1the energy intensity of received surface acoustic wave signal is less than the setting threshold values, is judged to be falsity 0, means the no touch body, and CPU (central processing unit) MCU does not do any record, if receiving transducer Y
1the energy intensity of received surface acoustic wave signal is greater than the setting threshold values, is judged to be true value 1, and meaning has the touch body, and records receiving transducer Y by CPU (central processing unit) MCU
1coordinate; Complete receiving transducer Y
1detection after, complete successively the detection of residue receiving transducer 2, until after completing the detection of all receiving transducers 2, the surface acoustic wave signal that receiving circuit receives the acoustic signals receiving unit becomes packet by the A/D circuit conversion, and add time mark to packet, then by cycle time, send to CPU (central processing unit) MCU to be processed packet, by CPU (central processing unit) MCU, determine that the coordinate that touches body is (X
1, Y
1), carry out and so forth, until all transmitting transducer 6 driven mistake all on X-axis, after completing once circulation, receiving circuit stops the receiving surface acoustic signals, waits for the instruction of circulation next time.
As shown in Figure 2, CPU (central processing unit) MCU drives separately transmitting transducer X by radiating circuit
1the time, surface acoustic wave is propagated along Y direction, and when running into touch body A, 90 degree reflections occur through touching body A in high density, high-octane surface acoustic wave signal, remove receiving transducer Y
8in addition, other receiving transducers 2 also in various degree received the energy that surface acoustic wave signal reflects, but only have receiving transducer Y
8the energy intensity of the surface acoustic wave signal received is greater than the setting threshold values, therefore, after Y-axis finishes scanning, can determine on Y-axis and only have a peak value Y
8, can be determined with so a true touch point and exist, be i.e. (X
1, Y
8).
After completing the surface acoustic wave signal detection of all receiving transducers 2, radiating circuit stops driving transmitting transducer X
1, and drive separately transmitting transducer X
2, surface acoustic wave signal is propagated along Y direction, and when running into touch body B and C, 90 degree reflections occur through touching body in surface acoustic wave signal, and the Energy maximum value after reflection is respectively by Y
5and Y
3receive, do not have the place of touch point not there will be reflection, naturally also be received with regard to noenergy, after Y-axis finishes scanning, two peak value Y are arranged
5and Y
3, can be determined with so two true touch points and exist, be i.e. (X
2, Y
5) and (X
2, Y
3).
Radiating circuit stops driving transmitting transducer X
2after, drive separately transmitting transducer X
3, surface acoustic wave signal is propagated along Y direction, but does not run into the touch body, and the receiving transducer array 5 of Y-axis does not all receive signal, therefore without peak value, X
3without true touch point.
Radiating circuit stops driving transmitting transducer X
3after, drive separately transmitting transducer X
4, surface acoustic wave signal is propagated along Y direction, and when running into touch body D, E and F, the Energy maximum value of 90 degree reflections is respectively by Y
5, Y
7and Y
9receive, do not have the place of touch point not there will be reflection, although touch the 90 degree directions of body D, there is one to touch body B existence, but according to the surface acoustic wave transmission principle, 90% energy of surface acoustic wave signal is all transmission, therefore the existence of B can not affect the transmission of the 90 degree reflected energies of D, due to large several times of the amplitude of the reflected energy of other angles of Amplitude Ratio of 90 degree reflected energies, does not therefore affect the amplitude difference of other angle reflection energy yet.So, after Y-axis finishes scanning, three peak value Y are arranged
5, Y
7and Y
9, can be determined with so three true touch points and exist, be i.e. (X
4, Y
5), (X
4, Y
7) and (X
4, Y
9).
Radiating circuit stops driving transmitting transducer X
4after, drive separately transmitting transducer X
5, surface acoustic wave signal is propagated along Y direction, but does not run into the touch body, and the receiving transducer array 5 of Y-axis does not all receive signal, therefore without peak value, X
5without true touch point.
Radiating circuit stops driving transmitting transducer X
5voltage after, drive separately transmitting transducer X
6, surface acoustic wave signal is propagated along Y direction, and when running into touch body G, the Energy maximum value of 90 degree reflections is by Y
3receive, although touch the 90 degree directions of body G, have a touch to propose the C existence, do not affect the judgement of peak value, after Y-axis finishes scanning, a peak value Y is arranged
3, therefore can be determined with a true touch point and exist, be i.e. (X
6, Y
3).
A kind of surface acoustic wave touch screen of multiple spot actual touch, comprise touch-screen body 1, at least is provided with one group of transmitting transducer arrays 4 on the X-axis of described touch-screen body 1, at least is provided with one group of receiving transducer array 5 on Y-axis;
Further, by radiating circuit, drive separately successively transmitting transducer 6 acoustic waves signals, until all transmitting transducers 6 all driven mistake once, finish once circulation; Control all receiving transducers 2 receiving surface acoustic signals simultaneously by receiving circuit.
The principle of work of the present embodiment is: by radiating circuit, drive separately successively any one transmitting transducer 6 to continue the acoustic waves signal in setting-up time T, open the receiving cable of all receiving transducers 2 in receiving transducer array 5 simultaneously, and the beginning countdown, at first drive transmitting transducer X
1, this transmitting transducer X
1coordinate pre-recorded by CPU (central processing unit) MCU, when having the body of touch to touch, surface acoustic wave signal arrives receiving transducer 2 after touching body 90 degree reflections, whether the energy intensity that detects receiving transducer 2 received surface acoustic wave signals is greater than the setting threshold values, if the energy intensity of receiving transducer 2 received surface acoustic wave signals is less than the setting threshold values, be judged to be falsity 0, mean the no touch body, CPU (central processing unit) MCU does not do any record, if the energy intensity of receiving transducer 2 received surface acoustic wave signals is greater than the setting threshold values, be judged to be true value 1, mean to have the touch body, and recorded the time of reception of this surface acoustic wave signal by CPU (central processing unit) MCU, when time T exhausts, complete the detection of all receiving transducers 2, then drive successively second transmitting transducer X
2repeat above-mentioned surface acoustic wave signal receiving step, after receiving surface acoustic wave signal, receiving circuit becomes packet by the surface acoustic wave signal received by the A/D circuit conversion, and add time mark to packet, then by cycle time, send to CPU (central processing unit) MCU to be processed packet, by CPU (central processing unit) MCU, according to launch time and the time of reception of known transducer coordinate, surface acoustic wave signal, determine the coordinate that respectively touches body.
A kind of surface acoustic wave touch screen of multiple spot actual touch, comprise touch-screen body 1, at least is provided with one group of transmitting transducer arrays 4 on the X-axis of described touch-screen body 1, at least is provided with one group of receiving transducer array 5 on Y-axis;
Further, by radiating circuit, drive all transmitting transducers 6 acoustic waves signal simultaneously, by receiving circuit, control all receiving transducers 2 independent receiving surface acoustic signals successively.
The principle of work of the present embodiment is: by radiating circuit, drive all transmitting transducers 6 to continue the acoustic waves signal in setting-up time T, open the receiving cable of any one receiving transducer 2 in receiving transducer array 5 simultaneously, and beginning countdown, when having the body of touch to touch, surface acoustic wave signal arrives receiving transducer 2 after touching body 90 degree reflections, this receiving transducer 2 receives the surface acoustic wave signal of a plurality of touch body reflections, whether the energy intensity that detects these receiving transducer 2 received surface acoustic wave signals is greater than the setting threshold values, if the energy intensity of these receiving transducer 2 received surface acoustic wave signals is less than the setting threshold values, be judged to be falsity 0, mean the no touch body, CPU (central processing unit) MCU does not do any record, if the energy intensity of these receiving transducer 2 received surface acoustic wave signals is greater than the setting threshold values, be judged to be true value 1, mean to have the touch body, and record the coordinate of a plurality of touch bodies at receiving axes by CPU (central processing unit) MCU, after completing the detection of this receiving transducer 2, complete successively the detection of residue receiving transducer 2, until complete the detection of all receiving transducers 2, receiving circuit becomes packet by the surface acoustic wave signal received by the A/D circuit conversion, and add time mark to packet, then by cycle time, send to CPU (central processing unit) MCU to be processed packet, by CPU (central processing unit) MCU, according to launch time and the time of reception of known transducer coordinate, surface acoustic wave signal, determine the coordinate that respectively touches body.
A kind of surface acoustic wave touch screen of multiple spot actual touch, comprise touch-screen body 1, at least is provided with one group of transmitting transducer arrays 4 on the X-axis of described touch-screen body 1, at least is provided with one group of receiving transducer array 5 on Y-axis;
Further, by radiating circuit, drive all transmitting transducers 6 acoustic waves signal simultaneously, by receiving circuit, control all receiving transducers 2 receiving surface acoustic signals simultaneously.
The principle of work of the present embodiment is: by radiating circuit, drive all transmitting transducers 6 to continue the acoustic waves signal in setting-up time T, open the receiving cable of all receiving transducers 2 in receiving transducer array 5 simultaneously, and beginning countdown, when having the body of touch to touch, surface acoustic wave signal arrives receiving transducer 2 after touching body 90 degree reflections, one of them receiving transducer 2 receives the surface acoustic wave signal of a plurality of touch body reflections, whether the energy intensity that detects these receiving transducer 2 received surface acoustic wave signals is greater than the setting threshold values, if the energy intensity of these receiving transducer 2 received surface acoustic wave signals is less than the setting threshold values, be judged to be falsity 0, mean the no touch body, CPU (central processing unit) MCU does not do any record, if the energy intensity of these receiving transducer 2 received surface acoustic wave signals is greater than the setting threshold values, be judged to be true value 1, mean to have the touch body, and record the coordinate of a plurality of touch bodies at receiving axes by CPU (central processing unit) MCU, after completing the detection of all receiving transducers 2, receiving circuit becomes packet by the surface acoustic wave signal received by the A/D circuit conversion, and add time mark to packet, then by cycle time, send to CPU (central processing unit) MCU to be processed packet, by CPU (central processing unit) MCU, according to launch time and the time of reception of known transducer coordinate, surface acoustic wave signal, determine the coordinate that respectively touches body.
The present embodiment and above-described embodiment are basic identical, and the key distinction is: at least be provided with one group of transmitting transducer arrays 4 on the X-axis of described touch-screen body 1, the reflection strip array 3 that is provided with receiving transducer 2 on Y-axis and coordinates with receiving transducer 2; But for intensity and the touch sensitivity that strengthens surface acoustic wave signal, also two groups of transmitting transducer arrays 4 can be set on X-axis, two groups of receiving arraies that are comprised of receiving transducer 2 and reflection strip array 3 are set on Y-axis.
The principle of work of the principle of work of the present embodiment and embodiment 2 is basic identical, and the key distinction is: to any transmitting transducer X
iwhile being driven, transmitting transducer X
ithe surface acoustic wave signal of emission is parallel to Y direction, transmitting transducer X
ion the touch body be transmitted to reflection strip array 3 after making surface acoustic wave signal produce 90 degree reflections, 90 degree deflection rear surface acoustic signals occur after reflection strip array 3 conduct to receiving transducer 2, then unifiedly by receiving transducer 2, carry out the acoustic-electric conversion.Obviously, all surface acoustic signals all lives through one section by X after 90 degree reflections
ivertical to the distance between reflection strip array 3, difference is after reflection strip array 3 secondaries turn to only, surface acoustic wave signal near receiving transducer 2 first arrives receiving transducer 2, away from arriving receiving transducer 2 after the surface acoustic wave signal of receiving transducer 2, the present embodiment has been cancelled receiving transducer array 5, reduce the production cost of surface acoustic wave touch screen, be conducive to mass production.
Embodiment 6
The present embodiment and above-described embodiment are basic identical, and the key distinction is: at least be provided with one group of receiving transducer array 5 on the Y-axis of described touch-screen body 1, the reflection strip array 3 that is provided with transmitting transducer 6 on X-axis and coordinates with transmitting transducer 6; But, in order to strengthen the receiving sensitivity of surface acoustic wave signal, also two groups of receiving transducer arrays 5 can be set on Y-axis.
Embodiment 7
The present embodiment and above-mentioned any embodiment are basic identical, the key distinction is: described transmitting transducer arrays 4 and receiving array all are arranged on the back side of touch-screen body 1, or described receiving transducer array 5 and emission array all be arranged on the back side of touch-screen body 1, guarantee that the touch face of touch-screen becomes a complete pure-surface.
Claims (6)
1. the surface acoustic wave touch screen of a multiple spot actual touch, comprise touch-screen body (1), it is characterized in that: also comprise that at least one group by a plurality of transducers transducer array formed in parallel, described transducer array is arranged on the X-axis of touch-screen body (1) or Y-axis and forms transmitting transducer arrays (4) or receiving transducer array (5), is provided with corresponding receiving array or emission array on Y-axis or X-axis.
2. the surface acoustic wave touch screen of a kind of multiple spot actual touch as claimed in claim 1 is characterized in that: described receiving array is receiving transducer array (5) or receiving transducer (2) and the reflection strip array (3) that coordinates with receiving transducer (2); Described emission array is transmitting transducer arrays (4) or transmitting transducer (6) and the reflection strip array (3) that coordinates with transmitting transducer (6).
3. the surface acoustic wave touch screen of a kind of multiple spot actual touch as claimed in claim 1 or 2, it is characterized in that: at least be provided with one group of transmitting transducer arrays (4) on the X-axis of described touch-screen body (1), at least be provided with one group of receiving transducer array (5) on Y-axis.
4. the surface acoustic wave touch screen of a kind of multiple spot actual touch as claimed in claim 1 or 2, it is characterized in that: at least be provided with one group of transmitting transducer arrays (4) on the X-axis of described touch-screen body (1), the reflection strip array (3) that is provided with receiving transducer (2) on Y-axis and coordinates with receiving transducer (2).
5. the surface acoustic wave touch screen of a kind of multiple spot actual touch as claimed in claim 1 or 2, it is characterized in that: at least be provided with one group of receiving transducer array (5) on the Y-axis of described touch-screen body (1), the reflection strip array (3) that is provided with transmitting transducer (6) on X-axis and coordinates with transmitting transducer (6).
6. the surface acoustic wave touch screen of a kind of multiple spot actual touch as claimed in claim 1, it is characterized in that: described transmitting transducer arrays (4) and receiving array all are arranged on the back side of touch-screen body (1), or described receiving transducer array (5) and emission array all are arranged on the back side of touch-screen body (1).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106293247A (en) * | 2016-09-05 | 2017-01-04 | 江苏特思达电子科技股份有限公司 | A kind of surface acoustic wave touch screen and touch display system |
| CN107291307A (en) * | 2017-07-26 | 2017-10-24 | 京东方科技集团股份有限公司 | Ultrasonic wave contactor control device and method, display device |
-
2013
- 2013-06-14 CN CN 201320342157 patent/CN203366300U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106293247A (en) * | 2016-09-05 | 2017-01-04 | 江苏特思达电子科技股份有限公司 | A kind of surface acoustic wave touch screen and touch display system |
| 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 |
| CN107291307A (en) * | 2017-07-26 | 2017-10-24 | 京东方科技集团股份有限公司 | Ultrasonic wave contactor control device and method, display device |
| WO2019019606A1 (en) * | 2017-07-26 | 2019-01-31 | 京东方科技集团股份有限公司 | Ultrasonic touch apparatus and method, and display apparatus |
| US11221713B2 (en) | 2017-07-26 | 2022-01-11 | Boe Technology Group Co., Ltd. | Ultrasonic touch device and MEl'hod, display device |
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