CN103577022B - A kind of electromagnetism touch control device and coordinate location method thereof - Google Patents
A kind of electromagnetism touch control device and coordinate location method thereof Download PDFInfo
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- CN103577022B CN103577022B CN201210270627.XA CN201210270627A CN103577022B CN 103577022 B CN103577022 B CN 103577022B CN 201210270627 A CN201210270627 A CN 201210270627A CN 103577022 B CN103577022 B CN 103577022B
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Abstract
The embodiment of the present invention provides a kind of electromagnetism touch control device and coordinate location method thereof, relate to electromagnetic handwritten input field, can improve the coordinate setting speed of time writer in electromagnetism touch control device, solution touch point is lost, the phenomenon of time delay location, described method comprises: the M+1 arranging outside the effective area edge of demonstration that is distributed in described electromagnetic handwritten plate in described antenna plate organizes the first coil, then organize the first coil by first opening described M+1, scanning detects the second coil, the second coil corresponding to maximum signal amplitude value in described the second induction coil detecting is defined as to maximum the second coil, open again described maximum the second coil, scanning detects described the first coil, obtain the coil combination of maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil composition, and calculate the coordinate position of described time writer on described electromagnetic handwritten plate according to described coil combination.
Description
Technical field
The present invention relates to electromagnetic handwritten input field, relate in particular to a kind of electromagnetism touch control device andCoordinate location method.
Background technology
Electromagnetism touch technology, because positioning precision is high, sensitivity advantages of higher, enjoys market favor,Be widely used on the equipment such as e-book, handwritten computer, mobile phone.
In electromagnetism touch control device, definite method of time writer coordinate position is roughly as follows: electromagnetism touch-controlTransmitting coil in equipment in antenna plate sends pumping signal, and the resonance circuit in time writer is subject toAfter the excitation of this pumping signal, produce electromagnetic induction signal, this electromagnetic induction signal is by antenna plateReceive the controller warp of electromagnetism touch control device with the receiving coil of described transmitting coil vertical distributionAfter crossing coordinate measurement, can obtain the coordinate position of time writer in antenna plate. In prior art,The coordinate position of time writer is that detailed process comprises by detecting by the method for root scanning:Open a certain coil of Y-direction, all coils on sequential scanning directions X, can obtain XThe signal amplitude that in direction, all coils is launched on this coil; , then open Y-direction thenAnother coil, all coils on sequential scanning directions X, can obtain directions X againThe signal amplitude of upper all coils transmitting; Until scanned the coil in all X and Y-directionTill, and these signal amplitudes are processed, obtain X side corresponding to maximum signal amplitude valueTo with Y-direction on a pair of coil combination, just can calculate according to described coil combinationThe coordinate position of time writer in antenna plate.
Along with the extensive use of electromagnetic induction antenna plate and the raising of antenna plate precision, antenna plateCoil number increase thereupon, the coil number that need to scan is more and more. Supposing has MIndividual receiving coil and N sends coil, need to scan M*N according to above-mentioned by root scanning methodInferior, sweep time is very long, like this, and in the time that time writer is clicked fast in antenna plate, because of scanningOverlong time easily causes coordinate setting slow, thereby produces showing that touch point is lost, time delay is locatedResemble.
Summary of the invention
Embodiments of the invention provide a kind of electromagnetism touch control device and coordinate location method thereof, canImprove the coordinate setting speed of time writer in electromagnetism touch control device, solve touch point loss, time delayThe phenomenon of location.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of electromagnetism touch control device, comprises time writer and electromagnetic handwritten plate, described electromagnetic handwritten plateComprise the antenna plate and the controller that are distributed with M and organize the first coil and N and organize the second coil, described inM, N are greater than 0 integer, and described the first coil and described the second coil intersect vertically;
Described antenna plate also comprises outside the effective area edge of demonstration that is distributed in described electromagnetic handwritten plateM+1 organize the first coil;
Described controller is used for opening described M+1 and organizes the first coil, and scanning detects described theTwo coil, by corresponding the maximum signal amplitude value in described the second induction coil detectingThe second coil is defined as maximum the second coil;
Described controller is also for opening described maximum the second coil, and scanning detects described First LineCircle, obtains maximum First Line corresponding to maximum signal amplitude value in described the first induction coilThe signal maximum coil combination of circle and described maximum the second coil composition, and according to described signalLarge coil combination calculates the coordinate position of described time writer on described electromagnetic handwritten plate.
Optionally, described controller is used for opening described M+1 and organizes the first coil, scanning inspectionSurvey described the second coil, by the peak signal width in described the second induction coil detectingThe second coil corresponding to value is defined as maximum the second coil and specifically comprises:
Open described M+1 and organize the first coil, scanning detects N and organizes the second coil successively, willThe N detecting organizes the second coil corresponding to maximum signal amplitude value in the second induction coilBe defined as maximum the second coil;
Described controller is also for opening described maximum the second coil, and scanning detects described First LineCircle, obtains maximum First Line corresponding to maximum signal amplitude value in described the first induction coilCircle specifically comprises with the signal maximum coil combination of described maximum the second coil composition:
Open described maximum the second coil, scanning detects M and organizes the first coil successively, obtains instituteState M organize maximum the first coil corresponding to maximum signal amplitude value in the first induction coil withThe signal maximum coil combination of described maximum the second coil composition.
A kind of coordinate location method, is applied to a kind of electromagnetism touch control device, and described electromagnetism touch-control is establishedBe distributed with M group first for comprising that time writer and electromagnetic handwritten plate, described electromagnetic handwritten plate compriseCoil and N organize antenna plate and the controller of the second coil, described M, N be greater than 0 wholeNumber, described the first coil and described the second coil intersect vertically; Show effectively in described antenna plateThe outer M+1 that lays of area edge organizes the first coil, and described method comprises:
Open described M+1 and organize the first coil, scanning detects described the second coil, will detectTo described the second induction coil in the second coil corresponding to maximum signal amplitude value determineFor maximum the second coil;
Open described maximum the second coil, scanning detects described the first coil, obtains described firstMaximum the first coil and described maximum corresponding to maximum signal amplitude value in induction coilThe signal maximum coil combination of two coil composition, and calculate according to described signal maximum coil combinationObtain the coordinate position of described time writer on described electromagnetic handwritten plate.
Optionally, open described M+1 and organize the first coil, scanning detects described the second coil,By the second line corresponding to maximum signal amplitude value in described the second induction coil detectingCircle is defined as maximum the second coil and specifically comprises:
Open described M+1 and organize the first coil, scanning detects N and organizes the second coil successively, willThe N detecting organizes the second coil corresponding to maximum signal amplitude value in the second induction coilBe defined as maximum the second coil;
Describedly open described maximum the second coil, scanning detects described the first coil, described in acquisitionMaximum the first coil that maximum signal amplitude value in the first induction coil is corresponding and describedThe signal maximum coil combination of large the second coil composition specifically comprises:
Open described maximum the second coil, scanning detects M and organizes the first coil successively, obtains instituteState M organize maximum the first coil corresponding to maximum signal amplitude value in the first induction coil withThe signal maximum coil combination of described maximum the second coil composition.
According to technique scheme, fixedly open newly-increased M+1 and organize the first coil, scanning inspectionSurvey the second coil, determining after maximum the second coil, fixedly open described maximum the second coil,Scanning detects the first coil, finally calculates the grid bearing of time writer, can reduce scanningNumber of times, thereby reduce sweep time, the coordinate that has improved time writer in electromagnetism touch control device is fixedBit rate, solves the phenomenon that touch point is lost, time delay is located.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below by rightIn embodiment or description of the Prior Art, the accompanying drawing of required use is briefly described, apparently,Accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain the attached of other according to these accompanying drawingsFigure.
The structured flowchart of a kind of electromagnetism touch control device that Fig. 1 provides for the embodiment of the present invention;
In the antenna plate of a kind of electromagnetism touch control device that Fig. 2 provides for the embodiment of the present inventionOne coil distribution schematic diagram;
A kind of coordinate location method schematic flow sheet that Fig. 3 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is enteredRow is described clearly and completely, and obviously, described embodiment is only the present invention's part embodiment,Instead of whole embodiment. Based on the embodiment in the present invention, those of ordinary skill in the art are not havingHave and make the every other embodiment obtaining under creative work prerequisite, all belong to the present invention protectionScope.
Embodiment 1
The embodiment of the present invention provides a kind of electromagnetism touch control device, as shown in Figure 1, and described electronicsTouch control device comprises time writer 11 and electromagnetic handwritten plate, and described electromagnetic handwritten plate comprises antenna plate12 and controller 13.
Time writer 11 is hand input devices that inside is provided with resonance circuit, and it can after being excitedTo produce electromagnetic induction signal.
Electromagnetic handwritten plate is the device that inside is provided with antenna plate 12 and controller 13, time writerCan in the effective district of the demonstration of electromagnetic handwritten plate, move input, described electromagnetic handwritten plate is by skyLine plate 12 and controller 13 detect the input trajectory of time writer.
In prior art, in antenna plate, be distributed with that M organizes the first coil and N organizes the second coil,Described M, N are greater than 0 integer, described the first coil and the vertical phase of described the second coilHand over. Wherein, if the coil being distributed in a direction is to described time writer 11 emitting electromagnetic wavesTransmitting coil, the coil distributing on perpendicular other direction receives described electromagnetism exactlyThe receiving coil of the induced signal that the electromagnetic wave of the described transmitting coil transmitting of pen 11 induction produces.In the antenna plate 12 that the embodiment of the present invention provides except described in being distributed with in prior art schemeM organizes the first coil and N organizes outside the second coil, also effective in the demonstration of described electromagnetic handwritten plateThe edge in district has increased M+1 and has organized the first coil. As shown in Figure 2, be electromagnetism of the present inventionThe first coil distribution schematic diagram in the antenna plate of touch control device, described the first coil has M+1Group. Wherein, the distribution situation of front M group coil is as shown in Figure 2, same as the prior art,One end is connected with variable connector respectively, and the other end links together by a resistance eutral grounding; InstituteState the limit that M+1 organizes the first coil 120 and be arranged on the effective district of demonstration of described electromagnetic handwritten plateEdge place. Under normal circumstances, as shown in Figure 2, described M+1 organizes the first coil and is distributed in figureDotted line place outside black surround shown in 2, described black surround is generally effective district of electromagnetic handwritten plateBorder, in Fig. 2, only shown M organize the first coil from left to right successively by sequence number at antennaThe situation of the distribution on plate, organizes the distribution feelings of the first coil and N organizes the second coil and described MCondition is identical, but distribution arrangement is vertical with the first coil for distributing from top to bottom. The left side of black surround existsThe left hand edge of the 2nd group of the first coil, right side is in the i.e. M-1 group of second from the bottom group of the first coilThe right hand edge of the first coil, the position relationship on the upper and lower both sides of black surround is identical with the right and left, alsoBe positioned over second group second of top coil top edge and second from the bottom group of the second coil followingEdge. Described M+1 organizes the first coil and is just distributed in the outside of black surround, is distributed in electromagnetism completelyPosition outside the edge in the effective district of demonstration of handwriting pad.
As shown in Figure 1, described controller 13 comprises four module: sending module 131,Receiver module 132, processing module 133 and control module 134. Control module 134 comprises placeReason device 1341, controls other modules and carries out operations.
Sending module 131 comprises signal generator 1311 and variable connector 1312, described signalGenerator 1311 can generate specified waveform signal, and sends by described variable connector 1312To the transmission coil in antenna plate, described variable connector 1312 is only opened one group of line of departure at every turnCircle, and send to this group transmitting coil the electromagnetic wave that described signal generator 1311 generates. WhenWhen time writer 11 approaches antenna plate 12, this group sends the electromagnetic wave that coil sends, through time writerAfter the resonance of 11 inside, produce electromagnetic induction signal. This electromagnetic induction signal is connectTake-up circle receives. Receiver module 132 comprises variable connector 1321 and amplifier 1322. DescribedVariable connector can be opened one group of receiving coil at every turn, and this group receiving coil is scanned to inspectionSurvey, obtain the electromagnetic induction signal that this group receiving coil receives, amplify through amplifier 1322After this amplifying signal is sent to processing module 133. Processing module 133 comprises treatment circuit1331, integrating circuit 1332 and sample circuit 1333. From the amplification of receiver module 132Treated circuit 1331 carries out after predetermined processing, generates integration believe by integrating circuit 1332 integrationsNumber, and utilize the sample amplitude maximum of integrated signal of A/D sample circuit 1333, obtain letterNumber amplitude, sends to described signal amplitude the processor 1341 of control module 134.
Definite principle of time writer coordinate position of touch-control input on electromagnetic handwritten plate is for fixingM+1 organizes the first coil, scanning detect described the second coil, by detect described secondThe second coil corresponding to maximum signal amplitude value in induction coil is defined as maximum the second lineCircle; Then fixing described maximum the second coil, scanning detects described the first coil, detects and obtainsMaximum the first coil corresponding to maximum signal amplitude value in described the first induction coil, by instituteState maximum the first coil and described maximum the second coil composition signal maximum coil combination, and according toDescribed signal maximum coil combination calculates described time writer on described electromagnetic handwritten plateCoordinate position. Wherein, in each induction coil scanning sense cycle of determining signal maximum,Only need open one group of transmitting coil or one group of receiving coil, accumulative total scans M+N time, can obtainOne group of transmitting coil of signal maximum and one group of receiving coil of signal maximum, the final letter that obtainsThe combination of number maximum coil. Controller can calculate and obtain electricity according to described signal maximum coil combinationThe coordinate position of magnetic pen. Its computational methods are prior art, when controller obtains described max lineAfter circle combination, if described the first coil is distributed on directions X, described the second coil is distributed in YIn direction, according to the signal amplitude of the first coil on directions X in described maximum coil combinationWith two groups of signal amplitudes that coil detects before and after it, obtain X side thereby carry out curve fittingTo coordinate. The coordinate account form of Y-direction is identical. Obtain the coordinate in X and Y-directionJust can determine described time writer coordinate position.
The antenna plate 12 providing for the embodiment of the present invention, described controller 13 is carried out following meritCan: described controller 13 is organized the first coil for opening described M+1, described in scanning detectsThe second coil, by the maximum signal amplitude value correspondence in described the second induction coil detectingThe second coil be defined as maximum the second coil.
Because organizing the first coil, described M+1 is distributed in as shown in Figure 2 the aobvious of electromagnetic handwritten plateBe shown with the outer edge in effect district, covered the effective display area of electromagnetic handwritten plate on a large scale, described inTime writer 11 positions one fix on described M+1 and organize within the scope of the delineation of the first coil. ThereforeOpen after described M+1 organizes the first coil and scan the induced signal detecting on the second coil, willIn the induced signal detecting, the second coil corresponding to maximum signal amplitude value is defined as maximum the second lineCircle. The position of time writer touch-control is position in the position at maximum the second coil place or near it.
Described controller 13 is opened described M+1 and is organized the first coil, and scanning detects described secondCoil, by corresponding the maximum signal amplitude value in described the second induction coil detectingTwo coil is defined as maximum the second coil following two kinds of methods.
First method is: controller 13 is opened described M+1 and organized the first coil, sweeps successivelyRetouch detection N and organize the second coil, the N detecting is organized to the maximum in the second induction coilThe second coil that signal amplitude is corresponding is defined as maximum the second coil.
In first method, controller 13 is opened described M+1 and is organized after the first coil, meetingOpen successively one group of second coil, scanning detects this group second induction coil, until allAfter N organizes the second coil and all opens, can detect and obtain N and organize the second induction coil.Now, all N that detect organize the maximum signal amplitude value correspondence in the second induction coilThe second coil be exactly maximum the second coil, the coordinate position of described time writer is just in described maximumThe second coil position or near its position.
Second method is: described controller is used for opening described M+1 and organizes the first coil,Detect one group of second coil every S group scanning, by the second induction coil detectingThe second coil corresponding to large-signal amplitude is defined as center the second coil; Scanning detects with institute successivelyThe 2S+1 stating centered by the second coil of center organizes the second coil, by the described 2S+1 detectingOrganize in the second induction coil the second coil corresponding to maximum signal amplitude value and be defined as maximum theTwo coil.
In the second approach, controller 13 is opened described M+1 and is organized after the first coil, everyCan open one group of second coil every S group and scan detection, the second line of such test sectionCircle, can obtain part the second induction coil. Then, by coil-induced this part secondThe second coil corresponding to maximum signal amplitude value in signal is defined as center the second coil, very aobviousSo, the coordinate position at described time writer place, near of described center the second coil, can not surpassCross described center the second coil left and right S group coil, one fix on taking described center the second coil as inThe 2S+1 of the heart organizes in the second coil. Now, controller 13 can scan successively and detect with described2S+1 centered by the second coil of center organizes the second coil. Like this, the described 2S+1 detectingOrganize all exactly N of maximum signal amplitude value in the second induction coil and organize the second coil-induced letterMaximum signal amplitude value in number, the second coil corresponding to described this maximum signal amplitude value is exactly maximumThe second coil, the coordinate position of described time writer is just attached at described maximum the second coil position or itsNear position.
Determining after described maximum the second coil, described controller 13 is also for described in openingMaximum the second coil, scanning detects described the first coil, detect obtain described first coil-inducedCorresponding maximum the first coil and described maximum the second coil groups of maximum signal amplitude value in signalThe signal maximum coil combination becoming, and described in calculating according to described signal maximum coil combinationThe coordinate position of time writer on described electromagnetic handwritten plate.
Controller 13 is determining that described maximum the second coil determined that time writer is at the second lineBehind the position at circle direction place, described controller 13 can fixedly be opened described maximum the second coil,Described the first coil is scanned to detection, detect and obtain the electromagnetism sense that described the first coil is correspondingMaximum the first coil corresponding to maximum signal amplitude value in induction signal, by this maximum first coil withDescribed maximum the second coil composition signal maximum coil combination, the processor in controller 131341 use computational methods of the prior art just passable according to described signal maximum coil combinationCalculate and obtain the coordinate position of described time writer on described electromagnetic handwritten plate.
Described controller 13 is opened described maximum the second coil, and scanning detects described the first coil,Detect maximum first corresponding to maximum signal amplitude value obtaining in described the first induction coilThe signal maximum coil combination of coil and described maximum the second coil composition has following two kinds of methods.
First method is: controller 13 is opened described maximum the second coil, scanning inspection successivelySurvey M and organize the first coil, obtain described M and organize the peak signal width in the first induction coilBe worth the signal maximum coil group of corresponding maximum the first coil and described maximum the second coil compositionClose.
In first method, controller 13 is opened after described maximum the second coil, can be successivelyOpen one group of first coil, scanning detects this group first induction coil, until all MAfter organizing the first coil and all opening, can detect and obtain M and organize the first induction coil.Now, just obtain described M and organized the maximum signal amplitude value correspondence in the first induction coilMaximum the first coil and the signal maximum coil combination of described maximum the second coil composition.
Second method is: controller 13 is opened described maximum the second coil, sweeps every T groupRetouch and detect one group of first coil, by maximum signal amplitude value in the first induction coil detectingThe first corresponding coil is defined as center the first coil; Scanning detects with described center first successively2T+1 centered by coil organizes the first coil, obtains described 2T+1 and organizes the first coil-induced letterMaximum the first coil corresponding to maximum signal amplitude value and described maximum the second coil composition in numberThe combination of signal maximum coil.
In the second approach, controller 13 is opened after described maximum the second coil, every TGroup can be opened one group of first coil and scan detection, the first coil of such test section,Can obtain part the first induction coil. Then, by this part the first induction coilIn the first coil corresponding to maximum signal amplitude value be defined as center the first coil, obviously, instituteState the coordinate position at time writer place near of described center the first coil, described in can not exceedingCenter the first coil left and right T group coil, one fixes on centered by the first coil of described center2T+1 organizes in the first coil. Now, controller 13 can scan successively and detect with described center2T+1 centered by the second coil organizes the first coil. Like this, the described 2T+1 group detectingIn the first induction coil, all exactly M of maximum signal amplitude value organize the first induction coilIn maximum signal amplitude value. Maximum the first coil and described maximum that this maximum signal amplitude value is correspondingThe second coil composition signal maximum coil combination, described controller can be according to described signal maximumCoil combination is calculated the coordinate position that obtains described time writer.
The first coil mentioned above can be transmitting coil, can be also receiving coil. Work as instituteWhen stating the first coil and being transmitting coil, described the second coil is receiving coil; When described First LineWhen circle is receiving coil, described the second coil is transmitting coil.
The embodiment of the present invention also provides a kind of coordinate location method, is applied to above-mentioned electromagnetism and touchesControl equipment, described electromagnetism touch control device comprises time writer and electromagnetic handwritten plate, described electromagnetic handwrittenPlate comprises antenna plate and controller, and described antenna plate except being distributed with M as in prior artOrganize the first coil and N and organize outside the second coil, also comprise being distributed in showing outside effective area edgeM+1 organizes the first coil. Described M, N are greater than 0 integer, described the first coil andDescribed the second coil intersects vertically; As shown in Figure 3, said method comprising the steps of:
301, open described M+1 and organize the first coil, scanning detects described the second coil, willThe second coil corresponding to maximum signal amplitude value in described the second induction coil detectingBe defined as maximum the second coil.
Because organizing the first coil, described M+1 is distributed in as shown in Figure 2 the aobvious of electromagnetic handwritten plateBe shown with the outer edge in effect district, covered the effective display area of electromagnetic handwritten plate on a large scale, described inTime writer position one fixes on described M+1 and organizes within the scope of the delineation of the first coil. Therefore openLogical described M+1 scans the induction letter on described the second coil detecting after organizing the first coilNumber, the second corresponding maximum signal amplitude value in the induced signal of detection coil is defined as to maximum theTwo coil. The position of time writer touch-control is position in the position at maximum the second coil place or near itPut.
Optionally, the controller of described electromagnetism touch control device is opened described M+1 group First LineCircle, scanning detects described the second coil, by described the second induction coil detectingThe second coil corresponding to maximum signal amplitude value is defined as maximum the second coil following two kinds of methods.
First method is: the controller of electromagnetism touch control device is opened described M+1 group firstCoil, scanning detects N and organizes the second coil successively, the N detecting is organized second coil-inducedThe second coil corresponding to maximum signal amplitude value in signal is defined as maximum the second coil.
In first method, the controller of electromagnetism touch control device is opened described M+1 group theAfter one coil, can open successively one group of second coil, scanning detects the coil-induced letter of this group secondNumber, until all N organize the second coil all scanned after, can detect and obtain N group secondInduction coil. Now, all N that detect organize in the second induction coilThe second coil corresponding to large-signal amplitude is exactly maximum the second coil, the coordinate position of described time writerJust put in described maximum the second coil position or near it position.
Second method is: the controller of electromagnetism touch control device is used for opening described M+1 groupThe first coil, detects one group of second coil every the scanning of S group, by the second coil sense detectingIn induction signal, the second coil corresponding to maximum signal amplitude value is defined as center the second coil; Sweep successivelyRetouch the 2S+1 detecting centered by the second coil of described center and organize the second coil, by what detectDescribed 2S+1 organizes the second coil corresponding to maximum signal amplitude value in the second induction coil and determinesFor maximum the second coil.
In the second approach, the controller of electromagnetism touch control device is opened described M+1 group theAfter one coil, can open one group of second coil every S group and scan detection, so only detectThe second coil of part, can obtain part the second induction coil. Then, by this partThe second coil corresponding to maximum signal amplitude value in the second induction coil is defined as centerTwo coil, obviously, the coordinate position at described time writer place is at described center the second coilNear, can not exceed described center the second coil left and right S group coil, one fixes on described center2S+1 centered by the second coil organizes in the second coil. Now, controller 13 can be swept successivelyRetouch the 2S+1 detecting centered by the second coil of described center and organize the second coil. Like this, detectTo described 2S+1 to organize in the second induction coil maximum signal amplitude value be exactly all N groups theMaximum signal amplitude value in two coil induced signal, described this maximum signal amplitude value corresponding secondCoil is exactly maximum the second coil, and the coordinate position of described time writer is just at described maximum the second lineThe orientation that circle distributes.
302, open described maximum the second coil, scanning detects described the first coil, obtains instituteState maximum the first coil corresponding to maximum signal amplitude value in the first induction coil with described inThe signal maximum coil combination of maximum the second coil composition, and according to described signal maximum coil groupClose and calculate the coordinate position of described time writer on described electromagnetic handwritten plate.
The controller of electromagnetism touch control device is determining that described maximum the second coil determined electricityBehind the position at magnetic pen place in the second coil direction, the controller of electromagnetism touch control device can be fixedOpen described maximum the second coil, described the first coil is scanned to detection, detect and obtain instituteState the maximum signal amplitude value correspondence in the signal amplitude of the electromagnetic induction signal that the first coil is correspondingMaximum the first coil, by this maximum first coil and described maximum the second coil composition signalLarge coil combination, and use calculating side of the prior art according to described signal maximum coil combinationMethod just can calculate the coordinate position of described time writer on described electromagnetic handwritten plate.
Optionally, the controller of electromagnetism touch control device is opened described maximum the second coil, scanning inspectionSurvey described the first coil, detect the maximum signal amplitude value obtaining in described the first induction coilThe signal maximum coil combination of corresponding maximum the first coil and described maximum the second coil compositionThere are following two kinds of methods:
First method is: the controller of electromagnetism touch control device is opened described maximum the second coil,Scanning detects M and organizes the first coil successively, obtains described M and organizes in the first induction coilThe signal of maximum the first coil that maximum signal amplitude value is corresponding and described maximum the second coil compositionMaximum coil combination.
In first method, the controller of electromagnetism touch control device is opened described maximum the second coilAfter, can open successively one group of first coil, scanning detects this group first induction coil, straightTo all M organize the first coil all open scanned after, can detect and obtain M and organize the second lineCircle induced signal. Now, just obtain described M and organized the maximum in the first induction coilThe signal maximum of maximum the first coil that signal amplitude is corresponding and described maximum the second coil compositionCoil combination.
Second method is: the controller of electromagnetism touch control device is opened described maximum the second coil,Detect one group of first coil every T group scanning, by the first induction coil detectingThe first coil corresponding to large-signal amplitude is defined as center the first coil; Scanning detects with institute successivelyThe 2T+1 stating centered by the first coil of center organizes the first coil, obtains described 2T+1 group firstMaximum the first coil and described maximum second corresponding to maximum signal amplitude value in induction coilThe signal maximum coil combination of coil composition.
In the second approach, the controller of electromagnetism touch control device is opened described maximum the second coilAfter, can open one group of first coil every T group and scan detection, such test sectionThe first coil, can obtain part the first induction coil. Then, by this part First LineThe first coil corresponding to maximum signal amplitude value in circle induced signal is defined as center the first coil,Obviously, the coordinate position at described time writer place is near of described center the first coil, noCan exceed described center the first coil left and right T group coil, one fixes on described center the first coilCentered by 2T+1 organize in the first coil. Now, controller 13 can scan detection successively2T+1 centered by the second coil of described center organizes the first coil. Like this, the institute detectingStating 2T+1, to organize in the first induction coil maximum signal amplitude value be exactly all M group First LinesMaximum signal amplitude value in circle induced signal. Maximum the first coil that this maximum signal amplitude value is correspondingWith described maximum the second coil composition signal maximum coil combination, described controller can be according to instituteState the coordinate position that the combination of signal maximum coil calculates described time writer.
The first coil described in this method can be transmitting coil, can be also receiving coil.In the time that described the first coil is transmitting coil, described the second coil is receiving coil; When describedWhen one coil is receiving coil, described the second coil is transmitting coil.
Electromagnetism touch control device and coordinate location method that application invention embodiment provides, to described electricityWhen the coordinate position of magnetic pen positions, at most only need scanning to detect M+N time, for existingIn technology M*N time, the number of times of scanning has reduced. In the coil number day of antenna plateToday that benefit increases, application the present invention can reduce scanning times widely, thereby reduces scanningTime, the coordinate setting speed of time writer in raising electromagnetism touch control device, solution touch point loss,The phenomenon of time delay location.
The embodiment of the present invention provides a kind of electromagnetism touch control device and coordinate location method thereof, passes throughIn described antenna plate, arrange outside the effective area edge of demonstration that is distributed in described electromagnetic handwritten plateM+1 organizes the first coil, then organizes the first coil by first opening described M+1, scanningDetect described the second coil, by the peak signal in described the second induction coil detectingThe second coil corresponding to amplitude is defined as maximum the second coil; Open again described maximum the second lineCircle, scanning detects described the first coil, obtains the maximum letter in described the first induction coilThe signal max line of maximum the first coil that number amplitude is corresponding and described maximum the second coil compositionCircle combination, and calculate described time writer at described electricity according to described signal maximum coil combinationCoordinate position on magnetic handwriting pad, so fixedly opens a newly-increased coil, and scanning detects secondCoil, determining after maximum the second coil, fixedly opens described maximum the second coil, scanning inspectionSurvey the first coil, finally calculate the grid bearing of time writer, can reduce the number of times of scanning,Thereby reduce sweep time, improved the coordinate setting speed of time writer in electromagnetism touch control device,Solve the phenomenon that touch point is lost, time delay is located.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodimentSuddenly can complete by the relevant hardware of programmed instruction, aforesaid program can be stored in a computerIn read/write memory medium, this program, in the time carrying out, is carried out the step that comprises said method embodiment;And aforesaid storage medium comprises: ROM, RAM, magnetic disc or CD etc. are various can store journeyThe medium of order code.
The above be only the specific embodiment of the present invention, but protection scope of the present invention alsoBe not limited to this, any be familiar with those skilled in the art the present invention disclose technology modelIn enclosing, the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. an electromagnetism touch control device, comprises time writer and electromagnetic handwritten plate, described electromagnetic handwrittenPlate comprises the antenna plate and the controller that are distributed with M and organize the first coil and N and organize the second coil, described inM, N are greater than 0 integer, and described the first coil and described the second coil intersect vertically; ItsBe characterised in that,
Described antenna plate also comprises outside the effective area edge of demonstration that is distributed in described electromagnetic handwritten plateM+1 organizes the first coil;
Described controller is used for opening described M+1 and organizes the first coil, and scanning detects described secondCoil, by corresponding the maximum signal amplitude value in described the second induction coil detectingTwo coil is defined as maximum the second coil;
Described controller is also for opening described maximum the second coil, and scanning detects described First LineCircle, obtains maximum First Line corresponding to maximum signal amplitude value in described the first induction coilThe signal maximum coil combination of circle and described maximum the second coil composition, and according to described signalLarge coil combination calculates the coordinate position of described time writer on described electromagnetic handwritten plate.
2. electromagnetism touch control device according to claim 1, is characterized in that, described controlDevice is used for opening described M+1 and organizes the first coil, and scanning detects described the second coil, will detectTo described the second induction coil in the second coil corresponding to maximum signal amplitude value be defined asMaximum the second coil specifically comprises:
Open described M+1 and organize the first coil, scanning detects N and organizes the second coil successively, will examineThe second coil corresponding to maximum signal amplitude value that the N measuring organizes in the second induction coil determinedFor maximum the second coil;
Described controller is also for opening described maximum the second coil, and scanning detects described First LineCircle, obtains maximum First Line corresponding to maximum signal amplitude value in described the first induction coilCircle specifically comprises with the signal maximum coil combination of described maximum the second coil composition:
Open described maximum the second coil, scanning detects M and organizes the first coil successively, described in acquisitionM organize maximum the first coil corresponding to maximum signal amplitude value in the first induction coil with described inThe signal maximum coil combination of maximum the second coil composition.
3. electromagnetism touch control device according to claim 1, is characterized in that, described controlDevice is used for opening described M+1 and organizes the first coil, and scanning detects described the second coil, will detectTo described the second induction coil in the second coil corresponding to maximum signal amplitude value be defined asMaximum the second coil specifically also comprises:
Described controller is used for opening described M+1 and organizes the first coil, detects every the scanning of S groupOne group of second coil, by corresponding maximum signal amplitude value in the second induction coil detectingThe second coil is defined as center the second coil; Successively scanning detect taking described center the second coil asThe 2S+1 at center organizes the second coil, and the described 2S+1 detecting is organized to the second induction coilThe second coil corresponding to middle maximum signal amplitude value is defined as maximum the second coil, and described S is for being greater thanEqual 1 integer.
4. according to the electromagnetism touch control device described in claim 1～3 any one, it is characterized in that,Described controller is also for opening described maximum the second coil, and scanning detects described the first coil,Obtain maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil withThe signal maximum coil combination of described maximum the second coil composition specifically also comprises:
Described controller, also for opening described maximum the second coil, detects one every the scanning of T groupOrganize the first coil, by corresponding maximum signal amplitude value in the first induction coil detectingOne coil is defined as center the first coil; Successively scanning detect taking described center the first coil as inThe 2T+1 of the heart organizes the first coil, obtains described 2T+1 and organizes maximum letter in the first induction coilThe signal maximum coil of maximum the first coil that number amplitude is corresponding and described maximum the second coil compositionCombination, described T is more than or equal to 1 integer.
5. electromagnetism touch control device according to claim 1, is characterized in that, described firstCoil is transmitting coil, and described the second coil is receiving coil; Or described the second coil is for sending outRay circle, described the first coil is receiving coil.
6. a coordinate location method, is applied to a kind of electromagnetism touch control device, described electromagnetism touch-controlEquipment comprises time writer and electromagnetic handwritten plate, and described electromagnetic handwritten plate comprises that being distributed with M organizes firstCoil and N organize antenna plate and the controller of the second coil, and described M, N are greater than 0 integer,Described the first coil and described the second coil intersect vertically; It is characterized in that, in described antenna plateShow that the outer M+1 of laying of effective area edge organizes the first coil, described method comprises:
Open described M+1 and organize the first coil, scanning detects described the second coil, will detectDescribed the second induction coil in the second coil corresponding to maximum signal amplitude value be defined asLarge the second coil;
Open described maximum the second coil, scanning detects described the first coil, obtains described firstMaximum the first coil and described maximum second corresponding to maximum signal amplitude value in induction coilThe signal maximum coil combination of coil composition, and calculate according to described signal maximum coil combinationCoordinate position to described time writer on described electromagnetic handwritten plate.
7. method according to claim 6, is characterized in that
Open described M+1 and organize the first coil, scanning detects described the second coil, will detectDescribed the second induction coil in the second coil corresponding to maximum signal amplitude value be defined asLarge the second coil specifically comprises:
Open described M+1 and organize the first coil, scanning detects N and organizes the second coil successively, will examineThe second coil corresponding to maximum signal amplitude value that the N measuring organizes in the second induction coil determinedFor maximum the second coil;
Describedly open described maximum the second coil, scanning detects described the first coil, described in acquisitionCorresponding maximum the first coil and the described maximum of maximum signal amplitude value in the first induction coilThe signal maximum coil combination of the second coil composition specifically comprises:
Open described maximum the second coil, scanning detects M and organizes the first coil successively, described in acquisitionM organize maximum the first coil corresponding to maximum signal amplitude value in the first induction coil with described inThe signal maximum coil combination of maximum the second coil composition.
8. method according to claim 6, is characterized in that,
Describedly open described M+1 and organize the first coil, scanning detects described the second coil, will examineThe second coil corresponding to maximum signal amplitude value in described the second induction coil measuring determinedFor maximum the second coil specifically also comprises:
Open described M+1 and organize the first coil, detect one group of second coil every the scanning of S group,The second coil corresponding to maximum signal amplitude value in the second induction coil detecting is defined asCenter the second coil; Scanning detects 2S+1 centered by the second coil of described center group the successivelyTwo coil, organizes maximum signal amplitude value pair in the second induction coil by the described 2S+1 detectingSecond coil of answering is defined as maximum the second coil, and described S is more than or equal to 1 integer.
9. according to the method described in claim 6～8 any one, it is characterized in that,
Describedly open described maximum the second coil, scanning detects described the first coil, described in acquisitionCorresponding maximum the first coil and the described maximum of maximum signal amplitude value in the first induction coilThe signal maximum coil combination of the second coil composition specifically also comprises:
Open described maximum the second coil, detect one group of first coil every the scanning of T group, will examineIn the first induction coil measuring, the first coil corresponding to maximum signal amplitude value is defined as centerThe first coil; Scanning detects the 2T+1 group First Line centered by the first coil of described center successivelyCircle, obtains described 2T+1 and organizes maximum corresponding to maximum signal amplitude value in the first induction coil theThe signal maximum coil combination of one coil and described maximum the second coil composition, described T is for being greater thanEqual 1 integer.
10. method according to claim 6, is characterized in that,
Described the first coil is transmitting coil, and described the second coil is receiving coil; Or, described inThe second coil is transmitting coil, and described the first coil is receiving coil.
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| CN103941913B (en) * | 2014-03-28 | 2016-10-05 | 上海天马微电子有限公司 | Inductive touch screen, driving detection method thereof and coordinate input device |
| CN107491235B (en) * | 2017-07-06 | 2020-09-11 | 深圳汉王友基科技有限公司 | Hand-drawing board and antenna arrangement method thereof |
| CN107844225A (en) * | 2017-11-21 | 2018-03-27 | 深圳市绘王动漫科技有限公司 | Electromagnetic touch device and its coordinate location method |
| CN109491555A (en) * | 2019-01-16 | 2019-03-19 | 北京汉王鹏泰科技股份有限公司 | A kind of double touch-control sensing mould groups, double touch control display apparatus and method |
| CN111913610B (en) * | 2020-08-06 | 2022-05-10 | 业成科技（成都）有限公司 | Touch display panel and touch coordinate acquisition method |
| CN113686230A (en) * | 2021-09-06 | 2021-11-23 | 深圳市绘王动漫科技有限公司 | Method, device and system for solving quick scribing and breaking |
| CN113900550B (en) * | 2021-09-26 | 2024-05-17 | 上海中航光电子有限公司 | Display panel and touch positioning method |
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