CN101373415B - Surface acoustic wave type sensing apparatus of touching control panel - Google Patents
Surface acoustic wave type sensing apparatus of touching control panel Download PDFInfo
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- CN101373415B CN101373415B CN2007101433753A CN200710143375A CN101373415B CN 101373415 B CN101373415 B CN 101373415B CN 2007101433753 A CN2007101433753 A CN 2007101433753A CN 200710143375 A CN200710143375 A CN 200710143375A CN 101373415 B CN101373415 B CN 101373415B
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Abstract
The invention provides a sensing device of an SAW-type (surface acoustic wave) touch panel, which is in novel reflector distribution. The reflector distribution which is different from the conventional distribution that varies from sparse to dense gradually is in the form of being spaced at equal intervals but including a plurality of sub-reflectors, so that when a vibration wave enters a row of reflectors on the relatively rear side, the reflected vibration wave quantity can still be equal to the reflected vibration wave quantity of a vibration wave entering a row of reflectors on the relatively front side, thereby avoiding the problem caused by the distribution form of the widely-known reflector row.
Description
Technical field
The present invention relates to the field of contact panel, the reverberator that more relates among a kind of reverberator row is non-with the sensing apparatus by surface acoustic wave type (SAW) contact panel of dredging gradually close pattern arrangement.
Background technology
Surface acoustic wave (SAW) formula contact panel is a kind of with the mode that is located in sensing one vibration wave signal in the purpose contact panel with the position of learning the touch-control input on a Touch Screen, its be utilize a transducer that comprises a piezoelectric with an electric power signal convert this vibration wave signal to, whether stopped when this vibration wave signal of sensing is advanced on this Touch Screen again by this touch-control input and can not received mode for it.
Figure 1A is depicted as a kind of structural representation of conventional surface acoustic wave formula contact panel.Shown in Figure 1A, this contact panel 10 has a screen area 11 and an echo area 12, has a sensing apparatus 13 in this echo area 12, this sensing apparatus 13 has first and second transverse axis inverting element 14a and 14b and first and second a longitudinal axis inverting element 15a and a 15b, and wherein second transverse axis and longitudinal axis inverting element 14b and 15b are respectively in order to receive input electric power signal Signal_Ei1 and corresponding vibration wave signal Signal_V1 and the Signal_V2 of Singal_Ei2 that sends with first transverse axis and longitudinal axis inverting element 14a and 15a.In addition, sensing apparatus 13 also comprises one group of first and second longitudinal axis reflector element 16a and 16b and one group of first and second transverse axis reflector element 17a and 17b, and these four groups of reflector element 16a, 16b, 17a and 17b all comprise a plurality of reverberator r, and these reverberators r is all partly transmission and partly reflects.At this moment, vibration wave Signal_V2 that possible contact P input on each transverse axis of sensing and the longitudinal axis is required and Signal_V1 just can be by these reverberators r by partly reflection and part transmission effect are provided, and these reverberators r is generally the line layer on the glass substrate that is printed on Touch Screen, so its cost of manufacture is low.In addition, these group reflector elements 16a, 16b, the reverberator r of 17a and 17b is all by dredging to solid matter row (direct of travel by vibration wave Signal_V1 and Signal_V2 is seen it), its former because vibration wave Signal_V1 and Signal_V2 do not add the density design single group of reflector element 16a, 16b, 17a and 17b go up and can make its reverberator r reflectible vibration wave Signal_V1 of institute and Signal_V2 than the rear less because of the part reflex, so just, can influence these group reflector elements 16a, 16b, so the sensing function of the input contact position of 17a and the more latter half of correspondence of 17b is these group reflector elements 16a, 16b, 17a and 17b are carried out the density setting to reach vibration wave Signal_V1 and the average in addition compensating action of Signal_V2 to inputing to each reverberator r.Be respectively shown in Figure 1B and Fig. 1 C contact panel of surface acoustic wave type shown in Figure 1A contactless P input and have contact P input time output electric power signal Signal_Eo1 and the level digram of Singal_Eo2, wherein Vy is the potential diagram of output electric power signal Signal_Eo1, and be the coordinate of the X-axis of input contact P, Vx is then for exporting the potential diagram of electric power signal Singal_Eo2, and be the coordinate of the Y-axis of input contact P, wherein the waveform time of Vx than the reason of the length of Vy be the second vibration wave Signal_V2 the path of process long due to, and the recessed waveform of Fig. 1 C partly is the sensed representative that gets of contact P input, and it is used as the foundation of the position of judging this contact P input.In addition, Vy and Vx have a sharp wave at section start, and it is due to the second transverse axis inverting element 14b and second longitudinal axis inverting element 15b receive by the second transverse axis reflector element group 17b and second longitudinal axis reflector element group 16b directly for importing electric power signal Signal_Ei1 and Singal_Ei2 respectively when just importing.
Yet, the surface acoustic wave type contact panel of above-mentioned tool reverberator density setting still has its shortcoming, being provided with of the reverberator of cause forefront part on each reverberator row is thin, so some input contact position place has between the tendency between the vibration wave of two adjacent reverberator reflections, so the position of these input contacts is more undesirable on sensing.
In view of above-mentioned purpose, the present invention proposes a kind of sensing apparatus of brand-new surface acoustic wave type contact panel, so as to improving the deficiency of known technology.
Summary of the invention
A purpose of the present invention is for proposing a kind of sensing apparatus of surface acoustic wave type contact panel, so as to improving the problem of known technology.
The sensing apparatus of the surface acoustic wave type contact panel that the present invention proposes comprises a transparency carrier, one first transverse axis inverting element, one second transverse axis inverting element, one first longitudinal axis inverting element and one second longitudinal axis inverting element, with one first group of longitudinal axis reflector element, one second group of longitudinal axis reflector element, one first group of transverse axis reflector element and one second group of transverse axis reflector element, this transparency carrier is essentially rectangle, have a screen area and an echo area, and one first transverse axis with two-phase opposite edges, one second transverse axis, one first longitudinal axis and second longitudinal axis, and this first and second transverse axis is parallel to each other in fact, and this first and second longitudinal axis is parallel to each other in fact; This first and second transverse axis inverting element is located at respectively on two edges of first transverse axis on this echo area, and this first and second longitudinal axis inverting element is located at respectively on two edges of first longitudinal axis on this echo area; This first group of longitudinal axis reflector element, second group of longitudinal axis reflector element, first group of transverse axis reflector element and second group of transverse axis reflector element are located at respectively in this echo area, and respectively along this first longitudinal axis, second longitudinal axis, thirty years of age on first transverse axis and second transverse axis, this first group and this second group of longitudinal axis reflector element respectively comprise the reverberator of one first number, this first group and this second group of transverse axis reflector element respectively comprise the reverberator of one second number, and the reverberator of this first number and second number is respectively along this first longitudinal axis, this second longitudinal axis and this first transverse axis, thirty years of age at the edge of this second transverse axis, wherein when an object touches some on this screen area, this first transverse axis and this first longitudinal axis inverting element are respectively in order to receive a transverse axis and longitudinal axis input electric power signal in turn at different time, and respectively this transverse axis and longitudinal axis input electric power signal are converted to a longitudinal axis vibration wave signal and a transverse axis vibration wave signal, and then advance along this first group of longitudinal axis reflector element and this first group of transverse axis reflector element respectively, receive to be respectively this second transverse axis inverting element and second longitudinal axis inverting element, so that this longitudinal axis and transverse axis vibration wave signal are converted to longitudinal axis output electric power signal and transverse axis output electric power signal respectively, and it is all gapped on each of first number on this first group and this second group of longitudinal axis reflector element and this first group and this second group of transverse axis reflector element and the reverberator of second number, constitute a plurality of sub-reverberators so as to each, and each gap and the gap relation between gap between each sub-reverberator of the reverberator of this first group and this second group of longitudinal axis reflector element and this first group and this second group of transverse axis reflector element and the adjacent sub-reverberator of the sub-reverberator of this first group and this second group of longitudinal axis reflector element and this first group and this second group of transverse axis reflector element is relevant with the formation material of described these group reflector elements.
In preferred embodiment, these each gap and relations between the gap between gap between each sub-reverberator of these reverberators of organizing first and second longitudinal axis reflector element and first and second transverse axis reflector element and neighbor's sub-reverberator of sub-reverberator of organizing first and second longitudinal axis reflector element and first and second transverse axis reflector element are relevant with the formation material of these group reflector elements, and an optimum value of the relation between this gap and these gaps is to decide according to experimental result.
By using the present invention, because the reverberator in these reflector elements be a density thirty years of age, so can avoid thin place in the known technology to penetrate putting reverberator can not effectively provide to importing the in addition problem of sensing of contact.
Description of drawings
The explanation of preferred embodiment of the present invention is to illustrate by following accompanying drawing, wherein:
Figure 1A is the explanation synoptic diagram of sensing principle of the contact input position of existing surface acoustic wave (SAW) formula contact panel;
Figure 1B is the signal level synoptic diagram that utilizes surface acoustic wave type contact panel resulting two output electric energy when contactless input of Figure 1A;
Fig. 1 C is the signal level synoptic diagram that utilizes surface acoustic wave type contact panel resulting two output electric energy when the contact input is arranged of Figure 1A;
Fig. 2 A is the explanation synoptic diagram of sensing principle of the contact input position of surface acoustic wave type contact panel of the present invention;
Fig. 2 B is the signal level synoptic diagram that utilizes surface acoustic wave type contact panel resulting two output electric energy when contactless input of Fig. 2 A; And
Fig. 2 C is the signal level synoptic diagram that utilizes surface acoustic wave type contact panel resulting two output electric energy when the contact input is arranged of Fig. 2 A.
[description of reference numerals]
10 surface acoustic wave type contact panels, 11 screen areas
12 element regions, 13 sensing apparatus
The 14a first transverse axis inverting element 14b second transverse axis inverting element
15a first longitudinal axis inverting element 15b second longitudinal axis inverting element
20 surface acoustic wave type contact panels, 21 screen areas
22 echo areas, 23 sensing apparatus
The 24a first transverse axis inverting element 24b second transverse axis inverting element
25a first longitudinal axis inverting element 25b second longitudinal axis inverting element
The 26a first transverse axis reflector element 26b second transverse axis reflector element
27a first longitudinal axis reflector element 27b second longitudinal axis reflector element
Embodiment
The present invention is a kind of sensing apparatus of surface acoustic wave type contact panel, and it will cooperate appended accompanying drawing to be described in detail as follows by preferred embodiment.
Fig. 2 A is depicted as the structural representation of the surface acoustic wave type contact panel that contains sensing apparatus of the present invention.As shown in the figure, this contact panel 20 is essentially a rectangular devices that is made of the transverse axis and the longitudinal axis, and has a screen area 21 and an echo area 22, and this sensing apparatus 23 is located under this echo area 22.Sensing apparatus 23 comprises first and second transverse axis transducer 24a and 24b and first and second a longitudinal axis transducer 25a and a 25b, and comprise one group of first and second longitudinal axis reflector element 26a and 26b and one group of first and second transverse axis reflector element 27a and 27b, wherein these groups reflector element 26a, 26b, 27a and 27b are respectively along this screen area 21 in line thirty years of age, and these organize the reverberator r that first and second longitudinal axis reflector element 26a and 26b respectively comprise one first number, and this first and second transverse axis reflector element 27a and 27b respectively comprise the reverberator r of one second number.In addition, these reverberators r is all partly transmission and partly reflects, and respectively has a plurality of sub-reverberator rs, and is to separate with a gap g between these sub-reverberator rs.
When practical operation, one electric power signal Signal_Ei1 is sent among the first transverse axis inverting element 24a of contact panel 20, the first transverse axis inverting element 24a then is converted to this electric power signal Signal_Ei1 one vibration wave signal Signal_V1, this vibration wave signal Signal_V1 then partly advances and partly is reflected along first longitudinal axis reflecting element group 26a, wherein these parts through partly reflection are that the second transverse axis inverting element 24b receives at last, and will be somebody's turn to do through receive vibration wave signal Signal_V1 be converted to one and export electric power signal Signal_Eo1 (shown in corresponding arrow A 1).Same but not simultaneously after, one input electric power signal Signal_Ei2 is sent among first longitudinal axis inverting element 25a of contact panel 20, first longitudinal axis inverting element 25a then should import electric power signal Signal_Ei2 and be converted to a vibration wave signal Signal_V2, this vibration wave signal Signal_V2 then advances along the first transverse axis reflecting element group 27a and 27b, be that second longitudinal axis inverting element 25b receives (shown in corresponding arrow A 2) at last, and will be somebody's turn to do through receive vibration wave signal Signal_V2 be converted to an output electric power signal Signal_Eo2, with reference as input position, outside sensing one contact.
In above-mentioned, why transverse axis X and longitudinal axis Y go up each corresponding transducer 24a and 24b and 25a and 25b is that vibration wave signal Signal_V1 and Signal_V2 are unlikely to interfere with each other in order to make in different time work.In addition, first and second input electric power signal Signal_Ei1 and Signal_Ei2 be with by continuously in turn the mode of confession deliver among first transverse axis and longitudinal axis inverting element 24a and the 25a, so that continuous sensing is done in the input of any possible contact.
At this moment, externally receive signal graph of first and second output electric power signal Signal_Eo1 and Signal_Eo2 shown in the Vy and Vx of Fig. 2 B.
When contact input P appears on the screen area 21, X and the Y-axis transfer path corresponding to this P of first and second vibration wave Signal_V1 and Signal_V2 just are blocked, so the time first and second output electric power signal Signal_Eo1 and Signal_Eo2 the accurate Vy in position and Vx just descend, shown in Fig. 2 C.Borrow some fall time with reference to these two accurate Vy and Vx, (X, Y) position can be judged to know the coordinate of this input contact P on screen area 21.
Because the existence of above-mentioned sub-reverberator rs, the reverberator r reflectible vibration wave Signal_V1 of institute and Signal_V2 these groups reflector element 26a, 26b, 27a and 27b more latter half of (direction with vibration wave Signal_V1 and self-corresponding inverting element 24a of Signal_V2 and 25b outgoing is seen it) do not reduce, because of the reverberator r of the more preceding part of these vibration waves Signal_V1 and the penetrable reflector element on the same group of Signal_V2 26a, 26b, 27a and 27b so.
Moreover, the reverberator r of these group reflector elements 26a, 26b, 27a and 27b can make its reverberator r can uniformly-spaced be established (as an interval sep) because of the existence of these sub-reverberator rs, this makes all input contact positions all can be positioned on the vibration wave Signal_V1 and Signal_V2 path of primary event, so do not have the sensing condition of poor, and therefore avoid the permanent problem that exists in the known technology.
In preferred embodiment, these organize the interval sep equal and opposite in direction between the reverberator r of first and second longitudinal axis reflector element 26a and 26b and first and second transverse axis reflector element 27a and 27b.These organize first and second longitudinal axis reflector element 26a and 26b and first and second transverse axis reflector element 27a and 27b sub-reverberator rs each gap g and relation and these group reflector elements 26a between the gap g between gap g between each the sub-reverberator rs of these reverberator r that organize first and second longitudinal axis reflector element 26a and 26b and first and second transverse axis reflector element 27a and 27b and neighbor's the sub-reverberator rs, 26b, the formation material of 27a and 27b is relevant, and an optimum value of the relation between of these gaps g and other gap g can obtain according to experimental result.
In addition, these reverberators r generally is respectively to be a reflected ray layer form, and these reflected ray layers are all an ink lay, and be to be made on the transparency carrier (not shown) with mode of printing, and this sensing apparatus 23 also is located on this transparency carrier, and wherein this transparency carrier is a transparent glass substrate in one embodiment.
In addition, this first and second input electric power signal Signal_Ei1 and Signal_Ei2 can be a same external signal source (not shown) generator to be provided, and the switching device shifter (not shown) signal that can be provided to that this outside source is provided switches to this first and second input signal in turn at this moment.In addition, this first and second input electric power signal is all the form of pulse train (bursts).
The present invention by the specific embodiment explanation as above; those skilled in the art can derive out other by the principle of these embodiment may embodiment; the embodiment that so derives out all belongs to protection scope of the present invention, and real protection scope of the present invention is when being as the criterion by claims scope.
Claims (7)
1. the sensing apparatus of a surface acoustic wave type contact panel is characterized in that, comprises:
One transparency carrier, be essentially rectangle, have a screen area and an echo area, have one first transverse axis, one second transverse axis of two-phase opposite edges, one first longitudinal axis and second longitudinal axis with two-phase opposite edges, and this first and second transverse axis is parallel to each other in fact, and this first and second longitudinal axis is parallel to each other in fact;
One first transverse axis inverting element, one second transverse axis inverting element, one first longitudinal axis inverting element and one second longitudinal axis inverting element, this first and second transverse axis inverting element is located at respectively on two edges of first transverse axis on this echo area, and this first and second longitudinal axis inverting element is located at respectively on two edges of first longitudinal axis on this echo area; And
One first group of longitudinal axis reflector element, one second group of longitudinal axis reflector element, one first group of transverse axis reflector element and one second group of transverse axis reflector element, be located at respectively in this echo area, and respectively along this first longitudinal axis, second longitudinal axis, thirty years of age on first transverse axis and second transverse axis, this first group and this second group of longitudinal axis reflector element respectively comprise the reverberator of one first number, this first group and this second group of transverse axis reflector element respectively comprise the reverberator of one second number, and the reverberator of this first number and this second number is respectively along this first longitudinal axis, this second longitudinal axis and this first transverse axis, thirty years of age at the edge of this second transverse axis
Wherein when an object touches some on this screen area, this first transverse axis and this first longitudinal axis inverting element are respectively in order to receive a transverse axis and longitudinal axis input electric power signal in turn at different time, and respectively this transverse axis and longitudinal axis input electric power signal are converted to a longitudinal axis vibration wave signal and a transverse axis vibration wave signal, and then advance along this first group of longitudinal axis reflector element and this first group of transverse axis reflector element respectively, receive to be respectively this second transverse axis inverting element and second longitudinal axis inverting element, so that this longitudinal axis and transverse axis vibration wave signal are converted to longitudinal axis output electric power signal and transverse axis output electric power signal respectively, and all gapped on each of first number on this first group and this second group of longitudinal axis reflector element and this first group and this second group of transverse axis reflector element and the reverberator of second number, constitute a plurality of sub-reverberators so as to each; And the relation in the gap between gap between the sub-reverberator of each of the reverberator of the gap of each of the sub-reverberator of this first group and this second group of longitudinal axis reflector element and the reverberator of this first group and this second group of transverse axis reflector element, this first group and this second group of longitudinal axis reflector element and this first group and this second group of transverse axis reflector element and adjacent sub-reverberator is relevant with the formation material of described these group reflector elements.
2. the sensing apparatus of surface acoustic wave type contact panel as claimed in claim 1 is characterized in that, the interval between the reverberator of described first and second longitudinal axis reflector element and first and second transverse axis reflector element equates.
3. the sensing apparatus of surface acoustic wave type contact panel as claimed in claim 1 is characterized in that, described reverberator is all a reflected ray layer.
4. the sensing apparatus of surface acoustic wave type contact panel as claimed in claim 3 is characterized in that, described reflected ray layer is all an ink lay, and is made on this transparency carrier with mode of printing.
5. the sensing apparatus of surface acoustic wave type contact panel as claimed in claim 4 is characterized in that, described transparency carrier is a transparent glass substrate.
6. the sensing apparatus of surface acoustic wave type contact panel as claimed in claim 1 is characterized in that, the described longitudinal axis and transverse axis input electric power signal are provided by a same external signal generator.
7. the sensing apparatus of surface acoustic wave type contact panel as claimed in claim 1 is characterized in that, the described longitudinal axis and transverse axis input electric power signal are all pulse train.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101433753A CN101373415B (en) | 2007-08-21 | 2007-08-21 | Surface acoustic wave type sensing apparatus of touching control panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101433753A CN101373415B (en) | 2007-08-21 | 2007-08-21 | Surface acoustic wave type sensing apparatus of touching control panel |
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| CN101373415A CN101373415A (en) | 2009-02-25 |
| CN101373415B true CN101373415B (en) | 2010-06-02 |
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Cited By (4)
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| US9594450B2 (en) | 2011-11-18 | 2017-03-14 | Sentons Inc. | Controlling audio volume using touch input force |
| US10048811B2 (en) | 2015-09-18 | 2018-08-14 | Sentons Inc. | Detecting touch input provided by signal transmitting stylus |
| US10061453B2 (en) | 2013-06-07 | 2018-08-28 | Sentons Inc. | Detecting multi-touch inputs |
| US10126877B1 (en) | 2017-02-01 | 2018-11-13 | Sentons Inc. | Update of reference data for touch input detection |
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| CN101882035B (en) * | 2009-05-04 | 2012-04-11 | 禾瑞亚科技股份有限公司 | Signal driving method of surface acoustic wave touch panel and device thereof |
| US8638318B2 (en) * | 2010-05-28 | 2014-01-28 | Elo Touch Solutions, Inc. | Multi-layer coversheet for saw touch panel |
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| CN102298462A (en) * | 2011-05-31 | 2011-12-28 | 汉王科技股份有限公司 | Electronic device based on vibration induction and control method thereof |
| US10235004B1 (en) | 2011-11-18 | 2019-03-19 | Sentons Inc. | Touch input detector with an integrated antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9594450B2 (en) | 2011-11-18 | 2017-03-14 | Sentons Inc. | Controlling audio volume using touch input force |
| US10061453B2 (en) | 2013-06-07 | 2018-08-28 | Sentons Inc. | Detecting multi-touch inputs |
| US10048811B2 (en) | 2015-09-18 | 2018-08-14 | Sentons Inc. | Detecting touch input provided by signal transmitting stylus |
| US10126877B1 (en) | 2017-02-01 | 2018-11-13 | Sentons Inc. | Update of reference data for touch input detection |
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| CN101373415A (en) | 2009-02-25 |
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