CN103365494B - The method and apparatus of position detecting - Google Patents
The method and apparatus of position detecting Download PDFInfo
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- CN103365494B CN103365494B CN201210100527.2A CN201210100527A CN103365494B CN 103365494 B CN103365494 B CN 103365494B CN 201210100527 A CN201210100527 A CN 201210100527A CN 103365494 B CN103365494 B CN 103365494B
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Abstract
The invention relates to a kind of method and apparatus of position detecting, it is repeatedly to provide a section surface sound wave to transmit on a surface acoustic wave touch panel, and receives respectively aforementioned multistage surface acoustic wave by surface acoustic wave touch panel for the detecting of touch position. In addition, it is in receiving course or after receiving, and provides part output electric power signal respectively, to form a complete output electric power signal according to the different piece of each the section surface sound wave receiving. Can detect the position of touching according to the sunk part in complete output electric power signal.
Description
Technical field
The present invention relates to a kind of method and apparatus of detecting touch position, particularly relate to a kind of at large chiThe method and apparatus of very little surface acoustic wave panel detection touch position.
Background technology
Surface acoustic wave (SAW) formula contact panel is a kind of to be located in sensing one surface acoustic wave letter in an objectNumber mode to learn the contact panel of position of the touch-control input on a Touch Screen, itsUtilize a transducer that comprises a piezoelectric to convert an electric power signal to this surface acoustic wave signal, againWhen advancing on this Touch Screen, this surface acoustic wave signal of sensing whether stopped by this touch-control input and notThe received mode of energy for it.
Figure 1A is depicted as a kind of structural representation of conventional surface acoustic wave formula contact panel. As Figure 1A instituteShow, this contact panel 10 has a screen area 11 and an echo area 12, in this echo area 12, has oneSensing apparatus 13, this sensing apparatus 13 have first and second transverse axis inverting element 14a and 14b andOne first and second longitudinal axis inverting element 15a and 15b, wherein the second transverse axis and longitudinal axis inverting element 14bAnd 15b is respectively in order to receive the input electricity sending with the first transverse axis and longitudinal axis inverting element 14a and 15aCan signal Signal_Ei1 and surface acoustic wave signal Signal_V1 corresponding to Singal_Ei2 andSignal_V2. In addition, sensing apparatus 13 also comprises one group of first and second longitudinal axis reflector element 16aAnd 16b and one group of first and second transverse axis reflector element 17a and 17b, and these four groups of reflector elements16a, 16b, 17a and 17b all comprise multiple reflector R, and described reflector R is all part transmissionPart reflection person. Now, the possible contact P on the each transverse axis of sensing and the longitudinal axis inputs required surperficial soundRipple Signal_V2 and Signal_V1 just can be by described reflector R by part reflection and part transmissionsEffect is provided, and described reflector R is generally on a glass substrate that is printed on Touch ScreenLine layer, therefore its cost of manufacture is low. In addition described group of reflector element 16a, 16b, 17a and 17b,Reflector R is all by dredging to solid matter and is listed as (by the side of advancing of surface acoustic wave Signal_V1 and Signal_V2To sight), its former because surface acoustic wave Signal_V1 and Signal_V2 are not adding density designSingle group of reflector element 16a, 16b, 17a and 17b above can make it compared with rear because of part reflexThe reflectible surface acoustic wave Signal_V1 of reflector R institute and Signal_V2 less, so just canThe input contact position of impact to described group of reflector element 16a, 16b, 17a and the more latter half of correspondence of 17bThe sensing function of putting, therefore described group of reflector element 16a, 16b, 17a and 17b are carried out density settingIn addition average to reach surface acoustic wave Signal_V1 and Signal_V2 to inputing to each reflector RCompensating action. Shown in Figure 1B and Fig. 1 C, be respectively the contact panel of surface acoustic wave type shown in Figure 1A in nothingContact P input and have output electric power signal Signal_Eo1 and the Singal_Eo2 in contact P inputLevel digram, wherein Vy is the potential diagram of output electric power signal Signal_Eo1, and is input contactThe coordinate of the X-axis of P, Vx is the potential diagram of output electric power signal Singal_Eo2, and touches for inputtingThe coordinate of the Y-axis of some P, wherein the waveform time of Vx is second surface compared with the reason of person's length of VySound wave Signal_V2 the path of process long due to, and that the sunk part of Fig. 1 C is contact P is defeatedEnter the sensed representative obtaining, it is used as the foundation of the position of judging this contact P input. In addition Vy,And Vx may have a sharp wave (do not show in diagram) at section start, it is input electric power signal Signal_Ei1And Singal_Ei2 directly passes through respectively the second transverse axis reflector element group 17b and second in the time of just inputLongitudinal axis reflector element group 16b and be the second transverse axis inverting element 14b and the second longitudinal axis inverting element 15bDue to reception.
But in large-sized surface acoustic wave touch panel, surface acoustic wave is along with transmitting distance and warpThe increase of the reflector quantity of crossing and weakening, jointly, the depression amplitude of aforementioned sunk part also along withReduce. Therefore, apart from transverse axis and longitudinal axis inverting element 14a and 15a touching at a distance likely because ofFor the amplitude of depression does not exceed door limit value, and cannot be detected.
As can be seen here, above-mentioned prior art obviously has inconvenience and defect, and that the utmost point is treated is in addition furtherImprove. In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks to solve it painstakinglyRoad, completed, and common product and method does not have but have no for a long time applicable design always by developmentHave appropriate structure and method to address the above problem, this is obviously asking of the relevant anxious wish solution of dealerTopic. Therefore how to found a kind of new technology, real one of the current important research and development problem that belongs to, also becomesThe current industry utmost point needs improved target.
Summary of the invention
The object of the invention is to, overcome existing detecting touch position method and apparatus exist lackFall into, and a kind of new position detection method is provided, technical problem to be solved is to solve large scaleThe surface acoustic wave signal of surface acoustic wave touch panel caused signal too faint because transmitting far, consequentlyIndistinguishable goes out the problem of touching, is very suitable for practicality.
Another object of the present invention is to, a kind of position detecting apparatus of new structure is provided, separateTechnical problem is certainly to detect respectively at each sunk part according to complete output electric power signal furtherMeasure a position, thereby be more suitable for practicality.
The object of the invention to solve the technical problems realizes by the following technical solutions. FoundationIts of the present invention's proposition comprises: carry out first stage detecting, comprising: every according to what receive respectivelyThe different piece of one section surface sound wave provides one section of part to export electric power signal, defeated to gather whole partsGo out electric power signal and become a complete output electric power signal; Detect in complete output electric power signal eachOne-phase sunk part, wherein each first stage sunk part is greater than a door limit value; And comply withJudge respectively a position according to each first stage sunk part, when arbitrary first stage sunk partDuring across multistage part output electric power signal, carry out a second stage detecting, comprising: respectively according to eachThe individual first stage sunk part across multistage part output electric power signal produces one section of second stage surface soundRipple, and produce a second stage output electric power signal according to the surface acoustic wave receiving; And foundationIn second stage output electric power signal, detect aforesaid position corresponding to aforementioned first stage sunk partPut.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid position detection method, complete output electric power signal is on this surface described in wherein said itsSound wave touch controlled panel presents sawtooth wave mode when not touched.
Aforesaid position detection method, second stage output electric power signal is non-described in wherein said itsSawtooth wave mode.
Aforesaid position detection method, the wave number of second stage surface acoustic wave is described in wherein said itsAccording to producing across the first stage sunk part of multistage part output electric power signal accordingly.
Aforesaid position detection method, the gain of second stage surface acoustic wave is described in wherein said itsAccording to producing across the first stage sunk part of multistage part output electric power signal accordingly.
The object of the invention to solve the technical problems also realizes by the following technical solutions. According to thisIts of invention proposition comprises: a surface acoustic wave touch panel, comprises this surface acoustic wave touch face that is distributed inThe reflector array on plate four limits and a sensing apparatus, this sensing apparatus comprises: one first longitudinal axis transducing unitPart and one first transverse axis inverting element, provide respectively multistage surface acoustic wave at this surface acoustic wave touch panelTransmit; And one second longitudinal axis inverting element and one second transverse axis inverting element, be received in respectively this tableThe surface acoustic wave that face sound wave touch controlled panel transmits; And a control circuit, comprising: carry out one first rankSection detecting, comprising: provide one section of portion according to the different piece of each the section surface sound wave receiving respectivelyDivide output electric power signal, become a complete output electric energy letter to gather whole parts output electric power signalNumber; Detect each first stage sunk part in complete output electric power signal, wherein each firstStage sunk part is greater than a door limit value; And sentence respectively according to each first stage sunk partBreak and a position, in the time that arbitrary first stage sunk part is exported electric power signal across multistage part, carry outOne second stage detecting, comprising: export first of electric power signal according to each across multistage part respectivelyStage sunk part produces one section of second stage surface acoustic wave, and produces according to the surface acoustic wave receivingA raw second stage output electric power signal; And export in electric power signal corresponding to front according to second stageState first stage sunk part and detect aforesaid position.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid position detecting apparatus, complete output electric power signal is on this surface described in wherein said itsSound wave touch controlled panel presents sawtooth wave mode when not touched.
Aforesaid position detecting apparatus, second stage output electric power signal is non-described in wherein said itsSawtooth waveforms.
Aforesaid position detecting apparatus, the wave number of second stage surface acoustic wave is described in wherein said itsAccording to producing across the first stage sunk part of multistage part output electric power signal accordingly.
Aforesaid position detecting apparatus, the gain of second stage surface acoustic wave is described in wherein said itsAccording to producing across the first stage sunk part of multistage part output electric power signal accordingly.
The present invention compared with prior art has obvious advantage and beneficial effect. By above technical schemeKnown, main technical content of the present invention is as follows:
For achieving the above object, the invention provides a kind of position detection method, adopt and repeatedly provide oneSection surface sound wave transmits on surface acoustic wave touch panel, respectively according to each the section surface sound receivingThe different piece of ripple provides part output electric power signal, to form a complete output electric power signal. EachThe surface acoustic wave signal that section receives gives strengthening in various degree, thereby can overcome surface acoustic wave signalBecause transmitting the too faint problem of signal that far causes.
In addition, for achieving the above object, the present invention also provides a kind of position detecting apparatus, furtherEach sunk part according to complete output electric power signal detects respectively a position.
By technique scheme, the method and apparatus of position detecting of the present invention at least has following advantagesAnd beneficial effect:
1,, for the signal enhancement of the surface acoustic wave receiving, can be to increase wave number to reach, noCan be limited to the gain ability of hardware circuit;
2, give and different signal enhancements for different detection area, can allow signal maintain adaptabilityOne preset range, can significantly increase the size of applicable surface acoustic wave touch panel.
In sum, the method and apparatus of position detecting of the present invention, it,, for the detecting of touch position, isRepeatedly provide a section surface sound wave to transmit on a surface acoustic wave touch panel, and by surface acoustic wave touchPanel receives respectively aforementioned multistage surface acoustic wave. In addition be in receiving course or after receiving, respectively,Provide part output electric power signal according to the different piece of each the section surface sound wave receiving, to formOne complete output electric power signal. Can detect touching according to the sunk part in complete output electric power signalPosition. The present invention is a significant progress in technology, and has obvious good effect, is really one newClever, progressive, practical new design.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, of the present invention in order to better understandTechnological means, and can being implemented according to the content of description, and for allow of the present invention above-mentioned andOther objects, features and advantages can become apparent, below especially exemplified by preferred embodiment, and coordinate attachedFigure, is described in detail as follows.
Brief description of the drawings
Figure 1A is the schematic diagram of the surface acoustic wave touch panel of prior art.
Figure 1B is that the surface acoustic wave type contact panel of prior art is at the output electric energy letter in contactless when inputNumber potential diagram.
Fig. 1 C is that the surface acoustic wave type contact panel of prior art is there being the contact output electric energy letter in when inputNumber potential diagram.
Fig. 1 D is that the large scale surface acoustic wave type contact panel of prior art is there being the contact output in when inputThe potential diagram of electric power signal.
The flow process of the method that Fig. 2 is a kind of position detecting of providing according to the first embodiment of the present invention is shownIntention.
Fig. 3 is the schematic diagram according to the signal acquisition of the first embodiment of the present invention.
Fig. 4 is the schematic flow sheet according to the detecting position of the third embodiment of the present invention.
Fig. 5 A and Fig. 5 B export electric energy across multistage for the detecting providing according to the second embodiment of the present inventionThe schematic diagram of the touch position of signal.
Detecting the touching across multistage output electric power signal of Fig. 5 C for providing according to the third embodiment of the present inventionTouch the schematic diagram of position.
10: surface acoustic wave type contact panel 11: screen area
12: element region 13: sensing apparatus
14a: the first transverse axis inverting element 14b: the second transverse axis inverting element
15a: the first longitudinal axis inverting element 15b: the second longitudinal axis inverting element
16a: the first transverse axis reflector element 16b: the second transverse axis reflector element
17a: the first longitudinal axis reflector element 17b: the second longitudinal axis reflector element
Signal_Ei1, Singal_Ei2: input electric power signal
Signal_V1, Signal_V2: surface acoustic wave signal
Signal_Eo1, Singal_Eo2: output electric power signal
P: input contact Vy, Vx, V: current potential
P1, P2, P3: detection area Sw1, Sw2, Sw3: output electric power signal
S1, S2, S3, Sr, S2*r: part is exported electric power signal
Smix: complete output electric power signal T1, T2: sunk part
R: ratio T: time
Th: door limit value
Detailed description of the invention
Technological means and the merit taked for reaching predetermined goal of the invention for further setting forth the present inventionEffect, below in conjunction with accompanying drawing and preferred embodiment, to method and the dress of the position detecting proposing according to the present inventionPut its detailed description of the invention, method, step, structure, feature and effect thereof, be described in detail as follows.
As shown in aforementioned Figure 1A, signal is to provide after a string continuous surface acoustic wave, by the second transverse axisAnd the signal that longitudinal axis inverting element 14b and 15b receive presents, signal can weaken gradually, jointlyImpact is corresponding to the depression amplitude of the sunk part of touching.
Referring to Fig. 2, is the side according to a kind of position detecting of first embodiment of the present invention propositionMethod. First as shown in step 210, in the time of each detecting, provide multistage surface acoustic wave at a surperficial soundOn ripple contact panel, transmit, and as shown in step 220, received respectively by surface acoustic wave touch panelAforementioned multistage surface acoustic wave. Aforementioned multistage surface acoustic wave can be to comprise that initial direction of transfer is along surperficial soundThe multistage surface acoustic wave of ripple contact panel Y with along the multistage table of surface acoustic wave touch panel X directionFace sound wave. In addition, the described surface acoustic wave receiving respectively comprises along surface acoustic wave touch panel Y and connecingThe multistage surface acoustic wave of receiving and the multistage surface acoustic wave receiving along surface acoustic wave touch panel X direction. SoAfter, as shown in step 230, in receiving course or after receiving, respectively according to each section receivingThe different piece of surface acoustic wave provides one section of part to export electric power signal, to form a complete output electric energySignal.
Consult Figure 1A, the device of position detecting of the present invention comprises that a contact panel 10 has a screen again11Ji Yi echo area, district 12, has a sensing apparatus 13, this sensing apparatus 13 in this echo area 12There is first and second transverse axis inverting element 14a and 14b and first and second longitudinal axis inverting element15a and 15b, wherein the second transverse axis and longitudinal axis inverting element 14b and 15b are respectively in order to receive and firstThe input electric power signal Signal_Ei1 that transverse axis and longitudinal axis inverting element 14a and 15a send andSurface acoustic wave signal Signal_V1 and Signal_V2 that Singal_Ei2 is corresponding, and then produce respectivelyOutput electric power signal Signal_Eo1 and Signal_Eo2. In addition, sensing apparatus 13 also comprises one groupFirst and second longitudinal axis reflector element 16a and 16b and one group of first and second transverse axis reflector element 17aAnd 17b, and these four groups of reflector element 16a, 16b, 17a and 17b all comprise multiple reflector R, andDescribed reflector R is all part transmissive portion reflection person. Now, on the each transverse axis of sensing and the longitudinal axis canEnergy contact P inputs required surface acoustic wave Signal_V2 and Signal_V1 just can be by described reflector RProvided by part reflection and part transmission effect, and described reflector R be generally be printed on tactileLine layer on one glass substrate of control screen, therefore its cost of manufacture is low. In addition described group of reflector element,The reflector R of 16a, 16b, 17a and 17b is listed as (by surface acoustic wave Signal_V1 by dredging to solid matterAnd the direct of travel of Signal_V2 is seen it).
The transmission of aforesaid input electric power signal Signal_Ei1 and Singal_Ei2 and output electric energy letterThe reception of number Signal_Eo1 and Signal_Eo2 is to be held by a control circuit (not showing in icon)OK, this area has and conventionally knows that the knowledgeable can know this known technology by inference, does not repeat them here. Control electricityThe method of aforementioned location detecting is carried out on road, and for example control circuit has a processor and a storage element, storageDeposit receipt unit is loaded with and coordinates processor to carry out the program of abovementioned steps 210 to step 230.
Referring to Fig. 3, in one example of the present invention, is respectively corresponding to vertical on surface acoustic wave panelAxle and transverse axis planning multistage detection area, each section of detection area is corresponding to the different section surfaces that receiveSound wave. Aforementioned multistage surface acoustic wave comprises that initial direction of transfer is along surface acoustic wave touch panel YMultistage surface acoustic wave with along the multistage surface acoustic wave of surface acoustic wave touch panel X direction. For example,, to indulgeIt is example that axle transmits surface acoustic wave, plans three sections of detection area on the y direction of surface acoustic wave panelP1, P2 and P3, and transmit three section surface sound waves, corresponding to this three section surfaces sound wave, receive respectivelyTo surface acoustic wave W1, W2 and W3, thereby produce output electric power signal Sw1, Sw2 and Sw3. ItsIn, according to the part generating portion corresponding to detection area P1 corresponding to the surface acoustic wave W1 receivingOutput electric power signal S1; According to corresponding to the surface acoustic wave W2 receiving corresponding to detection area P2'sPart generating portion output electric power signal S2; According to corresponding to the surface acoustic wave W3 receiving corresponding to detecingSurvey the part generating portion output electric power signal S3 of region P3; And Set-dissection output electric power signalS1, S2 and S3 have formed complete output electric power signal Smix. Although above stated specification be taking the longitudinal axis asExample, field of the present invention has knows that the knowledgeable can know above stated specification by inference and also be applicable to transverse axis conventionally. In addition, defeatedGo out electric power signal Smix and include but not limited to part output electric power signal S1, S2 and S3, also can wrapDraw together corresponding detection area P1 output electric power signal and the later output of corresponding detection area P3 beforeElectric power signal.
Although be to export electric power signal as example taking three sections of parts in Fig. 3, have logical in field of the present inventionOften know that the knowledgeable can know by inference, the surface acoustic wave of aforesaid part output electric power signal, transmission can be notSame hop count, the present invention is not limited. In addition, aforementioned each section of part exported picking of electric power signalGetting can be that wherein this time interval can according to capturing corresponding to the time interval of different detection areaBeing to consult when receiving the starting time of this section surface sound wave or this section surface sound wave initial being providedBetween, namely when receiving the starting time of this section surface sound wave or this section surface sound wave initial be providedBetween a period of time, this period of each section surface sound wave is inevitable identical.
In one example of the present invention, be respectively by the surface acoustic wave W1 receiving, W2 and W3 conversionBecome output electric power signal Sw1, after Sw2 and Sw3, more respectively by output electric power signal Sw1, Sw2 andIn Sw3, acquisition part is exported electric power signal S1, and S2 and S3, with complete output electric power signal Smix.
In another example of the present invention, be in the process receiving, respectively by the surperficial sound receivingRipple W1, in W2 and W3, corresponding to detection area P1, the part of P2 and P3 converts part output electricity toCan signal S1, S2 and S3.
In addition, the present invention more comprises the wave number of utilizing increase surface acoustic wave, maybe by the surperficial sound receivingThe output electric power signal of ripple conversion improves gain, will export electric power signal and amplify, and makes the portion being capturedDivide output electric power signal S1, S2 and S3 maintain a preset range.
In one example of the present invention, be that the wave number that increases surface acoustic wave improves output electric energy letterNumber. The wave number of the surface acoustic wave of each section of transmission can be different. For example, the surperficial sound of the 3rd sectionWave-wave number is greater than the surface acoustic wave wave number of second segment, and the surface acoustic wave wave number of second segment is greater than firstThe surface acoustic wave wave number of section. In other words, at least one section of posterior surface acoustic wave wave number is greater than preceding oneSection surface sound wave wave number. Apparently, aforesaid complete output electric power signal is at surface acoustic wave touch panelWhen not touched, may be partly or entirely to present sawtooth wave mode (sawtoothwaveform), present sawThe scope of the touching that the scope of tooth wave mode at least can detect corresponding to surface acoustic wave touch panel, orCorresponding to aforementioned transverse axis and longitudinal axis inverting element or reflector by surface acoustic wave reflection and through surface acoustic waveThe scope of contact panel.
In another example of the present invention, be to provide gain to improve output electric power signal. Each sectionThe surface acoustic wave receiving can be to capture part with different gains to export electric power signal. Change speechIt, described each output electric power signal be by sensing apparatus respectively according to one gain produce, corresponding toAfter this gain of at least one section surface sound wave be greater than this increasing corresponding to a preceding section surface sound waveBenefit, or the gain of at least one section of posterior part output electric power signal is greater than preceding one section of partThe gain of output electric power signal.
In an example more of the present invention, be that dual-purpose increases wave number and gain improves output electric energy letterNumber. No matter be to improve in which way output electric power signal, the sunk part that corresponding touching causes recessedSunken amplitude is also along with being enhanced.
By aforementioned manner, can allow output electric power signal not have touched at surface acoustic wave touch panelIn time, maintains in a preset range, and the depression amplitude of the sunk part that causes of corresponding touching also along withBe raised to the amplitude that can be detected, for example, be greater than a door limit value.
In the second embodiment of the present invention, can be to transmit single hop surface acoustic wave, and will receiveTo surface acoustic wave convert multistage part output electric power signal to multistage different gains, and allow eachSection part is exported electric power signal and is maintained a close scope. But at large scale surface acoustic wave touch panelIn, signal below may decay to the scope that is difficult to detecting, even if therefore improve gain, and mayCannot detect touching and touch position by partly exporting electric power signal.
In the third embodiment of the present invention, be to detect corresponding to the sunk part of touching across adjacentWhen multistage part output electric power signal, by transmitting again a section surface sound wave, and according to receivingSurface acoustic wave produces the one section of output electric power signal that comprises sunk part, accurately to judge touching positionPut. For example to calculate centroid position according to sunk part.
Comprehensively above-mentioned, the invention provides a kind of position detection method, refer to Fig. 4. According to step 410Shown in, be created in the complete output electric power signal of a surface acoustic wave touch panel when not touched, instituteThe complete output electric power signal of stating is the multistage portion that the different piece according to multiple surface acoustic waves produces respectivelyDivide the set of output electric power signal to form. Afterwards, as shown in step 420, be created in surface acoustic wave touchComplete output electric power signal when panel is touched. Next, as shown in step 430, with not byComplete output electric power signal when touching is compared, and detects complete output electric power signal when touchedEach sunk part, wherein the sinking degree of each sunk part is greater than a door limit value. Connect againGet off, as shown in step 440, detect respectively a position according to each sunk part. In addition, frontStating step 410 can be to be reached by control circuit to 440.
Refer to Fig. 5 A and contrast shown in Fig. 3, striding across part corresponding to the sunk part T1 of a touchingOutput electric power signal S1 and S2, if sunk part calculates the centroid position of touching according to this, defeated in partGo out depression amplitude on electric power signal S2 larger, can cause centroid position deflection part to export electric power signalS2. Therefore, as shown in Figure 5 B, be greater than door limit value in the depression amplitude of judging sunk part T1When th, provide the surface acoustic wave of a corresponding wave number to touch in surface acoustic wave corresponding to the scope of sunk part T1On control panel, transmit, to produce the part output electric energy letter comprising corresponding to the sunk part T2 with touchingNumber Sr. Owing to being the output electric power signal that foundation produces with section surface sound wave, the barycenter of therefore judgingPosition can present touch position more accurately.
In other words, abovementioned steps 410 to step 430 is to be considered as carrying out first stage detecting, andAnd in the time detecting arbitrary sunk part across multistage part output electric power signal, carry out a second stage and detectSurvey, to detect the position across multistage part output electric power signal representative.
Second stage detecting is the first stage depression across multistage part output electric power signal according to eachPart produces one section of second stage surface acoustic wave, and produces one second according to the surface acoustic wave receivingStage output electric power signal, second stage output electric power signal is non-sawtooth waveforms. Suppose in step 430The sunk part detecting is first stage sunk part, and each second stage output electric power signal is dividedNot corresponding to a first stage sunk part across multistage part output electric power signal, and correspondingFirst stage depressed part branch present a second stage sunk part. Aforesaid position is according to secondStage depressed part assigns to detect. That is, according in second stage output electric power signal corresponding to aforementioned theThe part of one-phase sunk part detects aforesaid position.
The wave number of aforesaid second stage surface acoustic wave can be according to electric across the output of multistage part accordinglyFirst stage sunk part that can signal produces, be for example according to first stage sunk part acrossThe last period part is exported the wave number of the corresponding surface acoustic wave of electric power signal, or caves according to the first stagePart institute across final stage part export the wave number of the corresponding surface acoustic wave of electric power signal, can be alsoAforementioned both average.
The gain of aforesaid second stage surface acoustic wave can be according to electric across the output of multistage part accordinglyFirst stage sunk part that can signal produces, be for example according to first stage sunk part acrossThe last period part is exported the corresponding gain of electric power signal, or according to first stage sunk part acrossRear one section of part is exported electric power signal and is gained accordingly, can be also aforementioned both average.
In the fourth embodiment of the present invention, be to detect corresponding to the sunk part of touching across adjacentWhen multiple parts output electric power signal, be by behind sunk part scope inherence or preceding part output electricityAt least one in energy signal adjusted (dwindle or amplify), and simulation becomes a continuous detecting waveform, withDetecting touch position. Example as shown in Figure 5 C, is exported the end signal of electric power signal according to preceding partWith the ratio r of the initial signal of posterior part output electric power signal, entirety is dwindled posterior part outputElectric power signal. In one example of the present invention, reduced when preceding part output electric power signal, beWith end signal and the posterior part output electric energy of reduced preceding part output electric power signalThe ratio of the initial signal of signal, entirety is dwindled posterior output electric power signal. Field of the present invention hasConventionally knowing that the knowledgeable also can know by inference, can be according to the initial signal of posterior detection signal and precedingThe ratio r of the end signal of output electric power signal, entirety is amplified preceding output electric power signal. SeparatelyOutward, can be also according to ratio r, be adjusted at front and posterior output electric power signal simultaneously.
In other words, in abovementioned steps 440, when corresponding each across multistage part output electric power signalSunk part be first to zoom in or out at least one section of part output electric power signal being striden across by sunk partThe rear detecting of just carrying out position.
Be greater than in forward part with the initial signal in rear section electric power signal in complete output electric power signalThe end signal of electric power signal is example, and the part output electric power signal that wish is amplified is that foundation is not touchedTime complete output electric power signal in the part output electric power signal of amplifying corresponding to described wish at latter one sectionPart is exported the initial signal of electric power signal and the part output electric power signal corresponding of described wish amplificationThe ratio that section part is exported the end signal of electric power signal amplifies and obtains. In addition, want the part of dwindlingOutput electric power signal is according to contracting corresponding to described wish in the complete output electric power signal when not touchedLittle part output electric power signal is partly exported end signal and the contracting of described wish of electric power signal in the last periodThe ratio that the little corresponding one section of part of part output electric power signal is exported the initial signal of electric power signal comesDwindle and obtain.
In the present invention, touch position is taking centroid position as example, but field of the present invention has conventionally and knowsThe knowledgeable can know other by inference and calculate the mode of touch position, and the present invention does not repeat them here.
Outside adopting, the detecting of aforesaid sunk part can be the complete output electric energy of comparing when not touchedSignal and the complete output electric power signal when touched can be also complete when directly detecting is touchedOutput electric power signal, the present invention is not limited.
The above, be only preferred embodiment of the present invention, not the present invention made to any formOn restriction, although the present invention disclose as above with preferred embodiment, but not in order to limit thisBright, any those skilled in the art, are not departing within the scope of technical solution of the present invention, when can profitMake a little change or be modified to the equivalent embodiment of equivalent variations with the technology contents of above-mentioned announcement, butEvery technical solution of the present invention content that do not depart from, according to technical spirit of the present invention to above embodiment instituteAny simple modification, equivalent variations and the modification done, all still belong in the scope of technical solution of the present invention.
Claims (10)
1. a position detection method, is characterized in that it comprises:
Carry out first stage detecting, comprising:
Provide one section of part to export electric energy according to the different piece of each the section surface sound wave receiving respectivelySignal, becomes a complete output electric power signal to gather whole part output electric power signal;
Detect each first stage sunk part in complete output electric power signal, wherein each firstStage sunk part is greater than a door limit value; And
Judge respectively a position according to each first stage sunk part, recessed when arbitrary first stageWhile falling into part across multistage part output electric power signal, carry out a second stage detecting, comprising:
Produce across the first stage sunk part of multistage part output electric power signal according to each respectivelyRaw one section of second stage surface acoustic wave, and produce one the according to the second stage surface acoustic wave receivingTwo-stage output electric power signal; And
According to detecting corresponding to aforementioned first stage sunk part in second stage output electric power signalGo out aforesaid position.
2. position detection method as claimed in claim 1, is characterized in that complete output electricity described in itCan in the time that a surface acoustic wave touch panel is not touched, present sawtooth wave mode by signal.
3. position detection method as claimed in claim 1, is characterized in that second stage is defeated described in itGoing out electric power signal is non-sawtooth wave mode.
4. position detection method as claimed in claim 1, is characterized in that second-order segment table described in itThe wave number of face sound wave is according to the first stage sunk part of exporting accordingly electric power signal across multistage partProduce.
5. position detection method as claimed in claim 1, is characterized in that second-order segment table described in itThe gain of face sound wave is according to the first stage sunk part of exporting accordingly electric power signal across multistage partProduce.
6. a position detecting apparatus, is characterized in that it comprises:
One surface acoustic wave touch panel, comprises the reflector that is distributed in these surface acoustic wave touch panel four limitsArray and a sensing apparatus, this sensing apparatus comprises:
One first longitudinal axis inverting element and one first transverse axis inverting element, provide respectively multistage surface acoustic waveTransmit at this surface acoustic wave touch panel; And
One second longitudinal axis inverting element and one second transverse axis inverting element, be received in respectively this surface acoustic waveThe surface acoustic wave that contact panel transmits; And
One control circuit, comprising:
Carry out first stage detecting, comprising:
Provide one section of part defeated according to the different piece of each the section surface sound wave receiving respectivelyGo out electric power signal, become a complete output electric power signal to gather whole part output electric power signal;
Detect each first stage sunk part in complete output electric power signal, wherein eachIndividual first stage sunk part is greater than a door limit value; And
Judge respectively a position according to each first stage sunk part, when arbitrary firstWhen stage sunk part is exported electric power signal across multistage part, carry out a second stage detecting, comprising:
First stage depressed part across multistage part output electric power signal according to each respectivelyDivide and produce one section of second stage surface acoustic wave, and produce according to the second stage surface acoustic wave receivingOne second stage output electric power signal; And
Export in electric power signal corresponding to aforementioned first stage sunk part according to second stageDetect aforesaid position.
7. position detecting apparatus as claimed in claim 6, is characterized in that complete output electricity described in itCan in the time that this surface acoustic wave touch panel is not touched, present sawtooth wave mode by signal.
8. position detecting apparatus as claimed in claim 6, is characterized in that second stage is defeated described in itGoing out electric power signal is non-sawtooth waveforms.
9. position detecting apparatus as claimed in claim 6, is characterized in that second-order segment table described in itThe wave number of face sound wave is according to the first stage sunk part of exporting accordingly electric power signal across multistage partProduce.
10. position detecting apparatus as claimed in claim 6, is characterized in that second-order segment table described in itThe gain of face sound wave is according to the first stage sunk part of exporting accordingly electric power signal across multistage partProduce.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210100527.2A CN103365494B (en) | 2012-04-09 | 2012-04-09 | The method and apparatus of position detecting |
| CN201610004184.8A CN105700742B (en) | 2012-04-09 | 2012-04-09 | The method and apparatus of position detecting |
| CN201610004093.4A CN105677095B (en) | 2012-04-09 | 2012-04-09 | The method and apparatus of position detecting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210100527.2A CN103365494B (en) | 2012-04-09 | 2012-04-09 | The method and apparatus of position detecting |
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| CN201610004184.8A Division CN105700742B (en) | 2012-04-09 | 2012-04-09 | The method and apparatus of position detecting |
| CN201610004093.4A Division CN105677095B (en) | 2012-04-09 | 2012-04-09 | The method and apparatus of position detecting |
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| CN103365494A CN103365494A (en) | 2013-10-23 |
| CN103365494B true CN103365494B (en) | 2016-05-18 |
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| CN201210100527.2A Active CN103365494B (en) | 2012-04-09 | 2012-04-09 | The method and apparatus of position detecting |
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| CN103389837A (en) * | 2012-05-09 | 2013-11-13 | 禾瑞亚科技股份有限公司 | Method and device for detecting position |
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| CN86102275A (en) * | 1985-02-05 | 1986-12-03 | 齐尼思电子公司 | Acoustic wave touch panel system |
| US5638093A (en) * | 1993-12-07 | 1997-06-10 | Seiko Epson Corporation | Touch panel input device and control method thereof |
| US6756973B2 (en) * | 2001-01-26 | 2004-06-29 | Fujitsu Limited | Touch panel device |
| EP1489482A2 (en) * | 2003-06-16 | 2004-12-22 | General Touch Technology Co. Ltd. | A touch position coordinate detecting system |
| JP4809130B2 (en) * | 2006-05-31 | 2011-11-09 | タッチパネル・システムズ株式会社 | Acoustic wave type touch panel |
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| US20070109280A1 (en) * | 2005-11-15 | 2007-05-17 | Tyco Electronics Raychem Gmbh | Apparatus and method for reporting tie events in a system that responds to multiple touches |
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| CN86102275A (en) * | 1985-02-05 | 1986-12-03 | 齐尼思电子公司 | Acoustic wave touch panel system |
| US5638093A (en) * | 1993-12-07 | 1997-06-10 | Seiko Epson Corporation | Touch panel input device and control method thereof |
| US6756973B2 (en) * | 2001-01-26 | 2004-06-29 | Fujitsu Limited | Touch panel device |
| EP1489482A2 (en) * | 2003-06-16 | 2004-12-22 | General Touch Technology Co. Ltd. | A touch position coordinate detecting system |
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