CN104850277A - Reflection fringe array for multi-point surface acoustic wave touch screen - Google Patents
Reflection fringe array for multi-point surface acoustic wave touch screen Download PDFInfo
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- CN104850277A CN104850277A CN201510279718.3A CN201510279718A CN104850277A CN 104850277 A CN104850277 A CN 104850277A CN 201510279718 A CN201510279718 A CN 201510279718A CN 104850277 A CN104850277 A CN 104850277A
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Abstract
The invention discloses a reflection fringe array for a multi-point surface acoustic wave touch screen. The reflection fringe array comprises a plurality of parallel reflecting units. Each reflecting unit comprises a plurality of reflecting fringes. The reflection fringe array has the advantages that one acoustic wave signal can be reflected into a plurality of acoustic wave signals of different directions, and multi-point actual touch response of at least two points can be achieved under the premise that equipment or device is not increased.
Description
Technical field
The present invention relates to surface acoustic wave touch screen, particularly relate to a kind of reflection strip array for multiple spot surface acoustic wave touch screen.
Background technology
Current touch-screen mainly contains the types such as surface acoustic wave, infrared and electric capacity, wherein surface acoustic wave touch screen owing to having the advantages such as resolution is high, the response time is short, environmental adaptation is strong, good stability, light transmission are good, become the touch-screen of most promotional value in several main flow touch-screen.
Existing general surface acoustic wave touching screen only has X-axis and the orthogonal physical positioning axle of Y-axis two, accurately can identify a touch point based on axes intersect principle and obtain unique one group of position coordinate data, its concrete principle is: for X-axis, control circuit produces and transmits (electric signal), the X-axis transmitting transducer of this electric signal on glass screen converts the ultrasound wave of thickness direction vibration to, the wedge mount refraction of ultrasound wave under transducer produces the component propagated along glass surface, ultrasound wave produces reflection run into 45 degree of reflection strips tilted in advance way after, produce and become 90 degree with incident wave, the component parallel with Y-axis, the another side that this component reaches glass screen X-direction also runs into 45 degree of reflection strips tilted, edge and launch party reach X-axis receiving transducer in the opposite direction after reflection.X-axis receiving transducer converts the sound wave be recovered to electric signal.Control circuit processes the waveform obtaining characterizing the distribution of glass screen acoustic wave energy to this electric signal.When having touch, finger meeting absorption portion acoustic wave energy, the signal be recovered to can produce decay, and process analysis attenuation can judge the touch point coordinate in X-direction.In like manner can judge the coordinate in Y direction, the coordinate one of X, Y both direction is determined, touch point is just uniquely identified naturally.But when two or more touch point is operated simultaneously, such as may there is the combinatorial coordinates of three or four positions during two touch points, the combinatorial coordinates of wherein one or two position is terrible point coordinate, the touch point of reporting is caused not to be real touch point, this just makes surface acoustic wave touch screen will lose efficacy when multiple spot touches simultaneously, significantly limit the development of surface acoustic wave touch screen.
In order to solve the problems of the technologies described above, in prior art, propose following technology:
As China Patent No. " 201320342157.3 " to disclose a kind of surface acoustic wave touch screen of multiple spot actual touch on Dec 25th, 2013, and China Patent No. " 200920298621.7 " disclosed a kind of multi-point surface acoustic wave touch screen on 09 08th, 2010.But with the prior art that above-mentioned two sections of patent documents are representative, realize multiple point touching by increase transducer and corresponding circuit, realize multiple point touching by increasing independently Z axis locating device, although such mode can realize and the response of above multiple spot actual touch at 2, but due to the increase of device, not only cause the cost of surface acoustic wave touch screen higher, also cause the heavier-weight of acoustic wave touching screen and thickness thicker, this and the lightness of existing market demand, narrow limit, boundlessization and panelized touch-screen are opposing and speed.
Summary of the invention
The object of the invention is to overcome the above-mentioned problems in the prior art, a kind of reflection strip array for multiple spot surface acoustic wave touch screen is provided, an acoustic signals can be reflected into the acoustic signals of multiple different directions by the present invention, thus under the prerequisite not increasing equipment or device, realize and the response of above multiple spot actual touch at 2.
For achieving the above object, the technical solution used in the present invention is as follows:
For a reflection strip array for multiple spot surface acoustic wave touch screen, it is characterized in that: described reflection strip array comprises the many groups of reflector elements be parallel to each other, often organize reflector element and include the different reflection strip of many slopes.
Described many groups reflector element is equidistantly arranged side by side.
In described reflector element, the quantity of reflection strip is 3-15.
In described reflector element, the slope of many reflection strips increases progressively successively.
In described reflector element, the angle of inclination of each reflection strip is 30-60 °.
In described reflector element, the mid point of many reflection strips intersects.
Part reflection strip in described reflector element intersects.
Many reflection strips in described reflector element are all non-intersect.
Employing the invention has the advantages that:
One, in the present invention, reflection strip array comprises the many groups of reflector elements be parallel to each other, often organize reflector element and include the different reflection strip of many slopes, this structure makes each reflector element an acoustic signals can be reflected into the acoustic signals of multiple different directions, compared with the reflection strip structure that in prior art, 45 degree are tilted, the present invention can form more intensive grating type acoustic signals on touch-screen body, when there being multiple touch point, the acoustic signals of multiple different reflector element reflection can be blocked in each touch point simultaneously, according to different directions by gear acoustic signals analysis, just can get rid of ghost fast put and determine all true touch points, thus realize and the response of above multiple spot actual touch at 2.The prior art being representative with China Patent No. " 201320342157.3 " and " 200920298621.7 " is compared, and after adopting the present invention, determine that the speed of multiple true touch point is faster, accuracy is higher.And relative to hardware, neither need to increase transducer and independently Z axis, do not need complicated control circuit, on touch-screen body, only increase reflection strip just can realize multiple point touching, significantly reduce the manufacturing cost of acoustic wave touching screen, seal ring thickness and weight yet.Meanwhile, the present invention, owing to decreasing transducer and simplifying circuit, correspondingly decreases the probability that acoustic wave touching screen breaks down, and is namely conducive to the quality and the reduction maintenance probability that improve whole acoustic wave touching screen.
Two, in the present invention, many groups reflector element is equidistantly arranged side by side, this set-up mode makes intensive acoustic signals can be evenly distributed on touch-screen body, ensures to touch the optional position no matter body is positioned at touch area, can both determine the coordinate touching body quickly and accurately.
Three, in the present invention, in reflector element, reflection strip quantity is more, can support that the touch point simultaneously touched is also more, therefore, the quantity of reflection strip in reflector element is set to 3-15, under the prerequisite that current process can realize, can supports that at most 40 touch points touch simultaneously, be applicable to the surface acoustic wave touch screen of various model, the scope of application is wider.
Four, in the present invention, in reflector element, the slope of many reflection strips increases progressively successively, and such being provided with is beneficial to effective identification of the multiple touch points to different directions.
Five, in the present invention, in described reflector element, the angle of inclination of each reflection strip is 30-60 °, and such set-up mode can ensure by the acoustic signals that reflects all within the scope of perpendicular to axial direction positive and negative 30 °, is conducive to the efficiency utilization of acoustic signals.
Six, in the present invention, in reflector element, the mid point of many reflection strips intersects, many reflection strip is all non-intersect or part reflection strip crossing, such set-up mode is conducive to the edge of touch-screen body to accomplish very narrow, thus realizes the acoustic wave touching screen of lightness, narrow limit, boundlessization and panelized.
Accompanying drawing explanation
Fig. 1 is the structural representation that many reflection strip mid points of reflector element in the present invention intersect;
Fig. 2 is all disjoint structural representation of many reflection strips of reflector element in the present invention;
Fig. 3 is the structural representation that the part reflection strip of reflector element in the present invention intersects;
Fig. 4 is the first structural representation that the present invention is arranged on touch-screen body;
Fig. 5 is the second structural representation that the present invention is arranged on touch-screen body;
Fig. 6 is the third structural representation that the present invention is arranged on touch-screen body;
Fig. 7 is the signal response oscillogram of receiving transducer in the present invention;
Being labeled as in figure: 1, reflector element, 2, reflection strip.
Embodiment
Embodiment 1
For a reflection strip array for multiple spot surface acoustic wave touch screen, described reflection strip array comprises the many groups of reflector elements be parallel to each other 1, and many group reflector elements 1 are equidistantly arranged side by side, and often organize reflector element 1 and include the different reflection strip 2 of many slopes.
In the present embodiment, in described reflector element 1, the equal quantity of reflection strip 2 is 7, and the slope of 7 reflection strips 2 increases progressively successively, and certainly, in reflector element 1, the slope of reflection strip 2 both for equidistantly to increase progressively, also can increase progressively for unequal-interval.
Further, the angle of inclination of 7 reflection strips 2 in reflector element 1 increases progressively successively, the angle of inclination of 7 reflection strips 2 is followed successively by 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, 60 °, during use, an acoustic signals all can be reflected into the acoustic signals of 7 kinds of different directions by each reflector element 1 in reflection strip array simultaneously.Wherein, the setting at above-mentioned angle of inclination, can ensure by the acoustic signals that reflects all within the scope of perpendicular to axial direction positive and negative 30 °, be conducive to the efficiency utilization of acoustic signals.
In the present embodiment, the mid point of the many reflection strips 2 in described reflector element 1 intersects, part reflection strip 2 in many reflection strips 2 intersects or many reflection strips 2 are all non-intersect.
Embodiment 2
For a reflection strip array for multiple spot surface acoustic wave touch screen, described reflection strip array comprises the many groups of reflector elements be parallel to each other 1, and many group reflector elements 1 are equidistantly arranged side by side, and often organize reflector element 1 and include the different reflection strip 2 of many slopes.
In the present embodiment, in described reflector element 1, the equal quantity of reflection strip 2 is 15, and the slope of 15 reflection strips 2 increases progressively successively, and certainly, in reflector element 1, the slope of reflection strip 2 both for equidistantly to increase progressively, also can increase progressively for unequal-interval.
Further, the angle of inclination of 15 reflection strips 2 in reflector element 1 increases progressively successively, the angle of inclination of 15 reflection strips 2 is followed successively by 31 °, 33 °, 35 °, 37 °, 39 °, 41 °, 43 °, 45 °, 47 °, 49 °, 51 °, 53 °, 55 °, 57 °, 59 °, during use, an acoustic signals all can be reflected into the acoustic signals of 15 kinds of different directions by each reflector element 1 in reflection strip array simultaneously.Wherein, the setting at above-mentioned angle of inclination, can ensure by the acoustic signals that reflects all within the scope of perpendicular to axial direction positive and negative 30 °, be conducive to the efficiency utilization of acoustic signals.
Embodiment 3
For a reflection strip array for multiple spot surface acoustic wave touch screen, described reflection strip array comprises the many groups of reflector elements be parallel to each other 1, and many group reflector elements 1 are equidistantly arranged side by side, and often organize reflector element 1 and include the different reflection strip 2 of many slopes.
In the present embodiment, in described reflector element 1, the equal quantity of reflection strip 2 is 3, and the slope of 3 reflection strips 2 increases progressively successively, and certainly, in reflector element 1, the slope of reflection strip 2 both for equidistantly to increase progressively, also can increase progressively for unequal-interval.
Further, the angle of inclination of 3 reflection strips 2 in reflector element 1 increases progressively successively, the angle of inclination of 3 reflection strips 2 is followed successively by 30 °, 45 °, 60 °, during use, an acoustic signals all can be reflected into the acoustic signals of 3 kinds of different directions by each reflector element 1 in reflection strip array simultaneously.Wherein, the setting at above-mentioned angle of inclination, can ensure by the acoustic signals that reflects all within the scope of perpendicular to axial direction positive and negative 30 °, be conducive to the efficiency utilization of acoustic signals.
In the present invention, as shown in Figure 4 and Figure 6, only depict the reflected signal of 7 kinds of different directions of wherein one group of reflector element 1, other often organizes the acoustic signals that reflector element 1 can form 7 kinds of different directions equally.Meanwhile, the slope one_to_one corresponding of 7 kinds of reflection strips 2 in the slope of 7 reflection strips 2 in reflector element 1 and other group reflector element 1 is often organized and equal.
The present invention in use, with (the trigger pip that transmits, its pulse width 200ns) adopt monopulse triggering mode to be example, by width and the spacing of the position of reasonable arrangement reflection strip 2, reflection angle and pulse, can accomplish that the superposed positions of oblique reflected signal at receiving transducer is all the time in the space of forward direction transmission Signal averaging position, signal can be made at receiving transducer place to reach addition of waveforms effect (comb signal waveform) as shown in Figure 7 by the position suitably adjusting reflection strip 2.Be numbered p-p(1-1,2-2 etc. in figure) pulse be just corresponding to acoustic signals (with the acoustic signals that X-axis is vertical) pulse (acoustic signals as existing acoustic wave touching screen), adjacently just the distance between the pulse of signal to be determined by the spacing between its reflection strip 2, for the ease of the process of signal, preferably will just be designed to equidistantly to the reflection strip 2 of signal; Be numbered p-q(1-9,2-10 etc.) pulse be the pulse that oblique acoustic signals is corresponding, p represents the numbering of first group of reflector element 1, and q represents the numbering of second group of reflector element 1.
After adopting the present invention, the principle that surface acoustic wave touch screen realizes multiple point touching is: controller controls X-axis transmitting driving circuit and exports a pulse excitation signal, transmitting transducer is driven to export sound wave pulse, after this sound wave pulse is reflected by the reflection strip 2 of Different Slope in first reflector element 1 in reflection strip array in X-axis, the reflected sonic signals of multiple different directions can be formed, this acoustic signals can be reflected by the reflection strip 2 in reflection strip array corresponding in X-axis, the receiving transducer end finally reflexing to X-axis is received and changes into electric signal, this signal is sent to reception on controller and treatment circuit is amplified process by it.Suppose all there is A group reflector element 1 in two reflection strip arrays in X-axis, often organizing in reflector element 1 all has B bar reflection strip 2, and so sound wave can form A*B acoustic signals path in X-axis.In like manner, the scanning of Y-axis and processing mode similar.
In the absence of a touch, the excitation pulse signal that transmitting terminal exports can form A*B echoed signal at receiving end, acoustic signals path when there being touch on corresponding path can be stopped, the echoed signal that receiving end is corresponding also can decay, receive processing unit and just can determine whether touch according to the change of signal amplitude, just can judge the position of touch point according to the position of respective decay signals, effectively can identify multiple point touching according to the stop situation of different directions signal like this.
Claims (8)
1. the reflection strip array for multiple spot surface acoustic wave touch screen, it is characterized in that: described reflection strip (2) array comprises the many groups of reflector elements be parallel to each other (1), often organize reflector element (1) and include the different reflection strip (2) of many slopes.
2., as claimed in claim 1 for the reflection strip array of multiple spot surface acoustic wave touch screen, it is characterized in that: described many groups reflector element (1) is equidistantly arranged side by side.
3. as claimed in claim 1 for the reflection strip array of multiple spot surface acoustic wave touch screen, it is characterized in that: in described reflector element (1), the quantity of reflection strip (2) is 3-15.
4., as claimed in claim 1 for the reflection strip array of multiple spot surface acoustic wave touch screen, it is characterized in that: in described reflector element (1), the slope of many reflection strips (2) increases progressively successively.
5., as claimed in claim 1 for the reflection strip array of multiple spot surface acoustic wave touch screen, it is characterized in that: in described reflector element (1), the angle of inclination of each reflection strip (2) is 30-60 °.
6. the reflection strip array for multiple spot surface acoustic wave touch screen according to any one of claim 1-5, is characterized in that: in described reflector element (1), the mid point of many reflection strips (2) intersects.
7. the reflection strip array for multiple spot surface acoustic wave touch screen according to any one of claim 1-5, is characterized in that: the part reflection strip (2) in described reflector element (1) intersects.
8. the reflection strip array for multiple spot surface acoustic wave touch screen according to any one of claim 1-5, is characterized in that: the many reflection strips (2) in described reflector element (1) are all non-intersect.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1711519A (en) * | 2002-11-13 | 2005-12-21 | 接触板系统股份有限公司 | Acoustic wave touch detecting apparatus |
| US20080062151A1 (en) * | 1996-08-12 | 2008-03-13 | Joel Kent | Acoustic condition sensor employing a plurality of mutually non-orthogonal waves |
| CN203596004U (en) * | 2013-11-19 | 2014-05-14 | 成都君锐信息技术有限公司 | Sound wave inclining projection type surface sound wave touch screen |
| CN204759387U (en) * | 2015-05-28 | 2015-11-11 | 成都吉锐触摸技术股份有限公司 | A reflection stripe array for multiple spot saw touch -sensitive screen |
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- 2015-05-28 CN CN201510279718.3A patent/CN104850277B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080062151A1 (en) * | 1996-08-12 | 2008-03-13 | Joel Kent | Acoustic condition sensor employing a plurality of mutually non-orthogonal waves |
| CN1711519A (en) * | 2002-11-13 | 2005-12-21 | 接触板系统股份有限公司 | Acoustic wave touch detecting apparatus |
| CN203596004U (en) * | 2013-11-19 | 2014-05-14 | 成都君锐信息技术有限公司 | Sound wave inclining projection type surface sound wave touch screen |
| CN204759387U (en) * | 2015-05-28 | 2015-11-11 | 成都吉锐触摸技术股份有限公司 | A reflection stripe array for multiple spot saw touch -sensitive screen |
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