CN103577022A - Electromagnetic touch device and coordinate positioning method thereof - Google Patents
Electromagnetic touch device and coordinate positioning method thereof Download PDFInfo
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- CN103577022A CN103577022A CN201210270627.XA CN201210270627A CN103577022A CN 103577022 A CN103577022 A CN 103577022A CN 201210270627 A CN201210270627 A CN 201210270627A CN 103577022 A CN103577022 A CN 103577022A
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Abstract
An embodiment of the invention provides an electromagnetic touch device and a coordinate positioning method thereof and relates to the field of electromagnetic handwriting input. Coordinate positioning speed of an electromagnetic stylus in the electromagnetic touch device can be increased, and the problems of touch point loss and delayed positioning are solved. The method includes: setting a (M+1)-th group of first coils, distributed outside the edge of a display effective region of an electromagnetic writing pad, on an antenna board, closing the (M+1)-th group of first coils, scanning and detecting second coils, and determining that a second coil corresponding to maximum signal amplitude of sensing signals of the second coils detected is a maximum second coil; closing the maximum second coil, scanning and detecting the first coils, acquiring a coil combination of the maximum second coil and the maximum first coil corresponding to the maximum signal amplitude of sensing signals of the first coils, and calculating according to the coil combination to obtain coordinates of the electromagnetic stylus on the electromagnetic writing pad.
Description
Technical field
The present invention relates to electromagnetic handwritten input field, relate in particular to a kind of electromagnetism touch control device and coordinate location method thereof.
Background technology
Electromagnetism touch technology, because positioning precision is high, sensitivity advantages of higher, enjoys market favor, is 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: the transmitting coil in electromagnetism touch control device in antenna plate sends pumping signal, resonant circuit in time writer is subject to producing electromagnetic induction signal after the excitation of this pumping signal, this electromagnetic induction signal is received with the receiving coil of described transmitting coil vertical distribution in antenna plate, and the controller of electromagnetism touch control device can obtain the coordinate position of time writer in antenna plate after coordinate measurement.In prior art, the coordinate position of time writer is to detect by the method by root scanning, detailed process comprises: open a certain coil of Y-direction, all coils on sequential scanning directions X, can obtain the signal amplitude that on directions X, all coils is launched on this coil; Then, then open another coil of Y-direction, all coils on sequential scanning directions X again, can obtain the signal amplitude of all coils transmitting on directions X; Until scanned the coil in all X and Y-direction, and these signal amplitudes are processed, obtain a pair of coil combination in directions X corresponding to maximum signal amplitude value and Y-direction, according to described coil combination, just can calculate the coordinate position of time writer in antenna plate.
Along with the widespread use of electromagnetic induction antenna plate and the raising of antenna plate precision, the coil number of antenna plate increases thereupon, and the coil number that need to scan is more and more.Suppose to have M receiving coil and N transmission coil, according to above-mentioned, by root scanning method, need to scan M*N time, sweep time is very long, like this, when time writer is clicked fast in antenna plate, because sweep time is long, easily cause coordinate setting slow, thereby produce, touch point is lost, the phenomenon of time delay location.
Summary of the invention
Embodiments of the invention provide a kind of electromagnetism touch control device and coordinate location method thereof, can improve the coordinate setting speed of time writer in electromagnetism touch control device, solve the phenomenon that touch point is lost, time delay is located.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of electromagnetism touch control device, comprise time writer and electromagnetic handwritten plate, described electromagnetic handwritten plate comprises that being distributed with M organizes antenna plate and the controller that the first coil and N organize the second coil, and described M, N are greater than 0 integer, and described the first coil and described the second coil intersect vertically;
Described antenna plate also comprises that the M+1 outside the effective area edge of demonstration that is distributed in described electromagnetic handwritten plate organizes the first coil;
Described controller is used for opening described M+1 and organizes the first coil, and scanning detects described the second coil, and the second coil corresponding to maximum signal amplitude value in described the second induction coil detecting is defined as to maximum the second coil;
Described controller is also for opening described maximum the second coil, scanning detects described the first coil, obtain the signal maximum coil combination that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form, and calculate the coordinate position of described time writer on described electromagnetic handwritten plate according to described signal maximum coil combination.
Optionally, described controller is used for opening described M+1 and organizes the first coil, and scanning detects described 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 and specifically comprises:
Open described M+1 and organize the first coil, scanning detects N and organizes the second coil successively, and the second coil corresponding to maximum signal amplitude value that the N detecting is organized in the second induction coil is defined as maximum the second coil;
Described controller is also for opening described maximum the second coil, scanning detects described the first coil, obtains signal maximum coil that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form and combines and specifically comprise:
Open described maximum the second coil, scanning detects M and organizes the first coil successively, obtains maximum the first coil corresponding to maximum signal amplitude value that described M organizes in the first induction coil and combines with the signal maximum coil that described maximum the second coil forms.
A kind of coordinate location method, be applied to a kind of electromagnetism touch control device, described electromagnetism touch control device comprises time writer and electromagnetic handwritten plate, described electromagnetic handwritten plate comprises that being distributed with M organizes antenna plate and the controller that the first coil and N organize the second coil, described M, N are greater than 0 integer, and described the first coil and described the second coil intersect vertically; Outside described antenna plate shows effective area edge, lay M+1 and organize the first coil, described method comprises:
Open described M+1 and organize the first coil, scanning detects described the second coil, and 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 described maximum the second coil, scanning detects described the first coil, obtain the signal maximum coil combination that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form, and calculate the coordinate position of described time writer on described electromagnetic handwritten plate according to described signal maximum coil combination.
Optionally, open described M+1 and organize the first coil, scanning detects described 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 and specifically comprises:
Open described M+1 and organize the first coil, scanning detects N and organizes the second coil successively, and the second coil corresponding to maximum signal amplitude value that the N detecting is organized in the second induction coil is defined as maximum the second coil;
Describedly open described maximum the second coil, scanning detects described the first coil, obtains signal maximum coil that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form and combines and specifically comprise:
Open described maximum the second coil, scanning detects M and organizes the first coil successively, obtains maximum the first coil corresponding to maximum signal amplitude value that described M organizes in the first induction coil and combines with the signal maximum coil that described maximum the second coil forms.
According to technique scheme, fixedly open newly-increased M+1 and organize the first coil, scanning detects the second coil, after determining maximum the second coil, fixedly opens described maximum the second coil, scanning detects the first coil, finally calculate the grid bearing of time writer, can reduce the number of times of scanning, thereby reduce sweep time, improve the coordinate setting speed of time writer in electromagnetism touch control device, solved the phenomenon that touch point is lost, time delay is located.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structured flowchart of a kind of electromagnetism touch control device that Fig. 1 provides for the embodiment of the present invention;
The first coil distribution schematic diagram in the antenna plate of a kind of electromagnetism touch control device that Fig. 2 provides for the embodiment of the present invention;
A kind of coordinate location method schematic flow sheet that Fig. 3 provides for the embodiment of the present invention.
Embodiment
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 clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
The embodiment of the present invention provides a kind of electromagnetism touch control device, and as shown in Figure 1, described electronic touch equipment comprises time writer 11 and electromagnetic handwritten plate, and described electromagnetic handwritten plate comprises antenna plate 12 and controller 13.
Time writer 11 is hand input devices that inside is provided with resonant circuit, and it can produce electromagnetic induction signal after being excited.
Electromagnetic handwritten plate is the device that inside is provided with antenna plate 12 and controller 13, and time writer can move in the demonstration of electromagnetic handwritten plate input in effective district, and described electromagnetic handwritten plate detects the input trajectory of time writers by antenna plate 12 and controller 13.
In prior art, be distributed with that M organizes the first coil and N organizes the second coil in antenna plate, described M, N are greater than 0 integer, and described the first coil and described the second coil intersect vertically.Wherein, if be distributed in coil in a direction for the transmitting coil to described time writer 11 emitting electromagnetic waves, the coil distributing on perpendicular other direction is exactly the receiving coil that receives the induced signal that the electromagnetic wave of the described transmitting coil transmitting of described time writer 11 induction produces.In the antenna plate 12 that the embodiment of the present invention provides in prior art scheme, be distributed with that described M organizes the first coil and N organizes the second coil, also the edge in the effective district of demonstration of described electromagnetic handwritten plate has increased M+1 and has organized the first coil.As shown in Figure 2, be the first coil distribution schematic diagram in the antenna plate of electromagnetism touch control device of the present invention, described the first coil has M+1 group.Wherein, as shown in Figure 2, same as the prior art, one end is connected with multi-way switch respectively the distribution situation of front M group coil, and the other end links together by a resistance eutral grounding; Described M+1 organizes the edge that the first coil 120 is arranged on the effective district of demonstration of described electromagnetic handwritten plate.Generally, as shown in Figure 2, described M+1 organizes the first coil and is distributed in the dotted line place outside the black surround shown in Fig. 2, described black surround is generally the border in effective district of electromagnetic handwritten plate, in Fig. 2, only shown that M organizes the from left to right situation of the distribution in antenna plate by sequence number successively of the first coil, and that N organizes the second coil is identical with the distribution situation that described M organizes the first coil, but distribution arrangement vertical with the first coil be to distribute from top to bottom.The left side of black surround is at the left hand edge of the 2nd group of the first coil, right side is the right hand edge that M-1 organizes the first coil at second from the bottom group of the first coil, the position relationship on the upper and lower both sides of black surround is identical with the right and left, is also the lower limb that is positioned over second group second of top coil coboundary and second from the bottom group of the second coil.Described M+1 organizes the outside that the first coil is just distributed in black surround, is distributed in the position outside the edge in the effective district of demonstration of electromagnetic handwritten plate completely.
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 processor 1341, controls other modules and carries out operations.
Sending module 131 comprises signal generator 1311 and multi-way switch 1312, described signal generator 1311 can generate specified waveform signal, and send to the transmission coil in antenna plate by described multi-way switch 1312, described multi-way switch 1312 is only opened one group of transmitting coil at every turn, and sends to this group transmitting coil the electromagnetic wave that described signal generator 1311 generates.When time writer 11 approaches antenna plate 12, this group sends the electromagnetic wave that coil sends, and after the resonance of time writer 11 inside, produces electromagnetic induction signal.The received coil of this electromagnetic induction signal receives.Receiver module 132 comprises multi-way switch 1321 and amplifier 1322.Described multi-way switch can be opened one group of receiving coil at every turn, and this group receiving coil is scanned to detection, obtains the electromagnetic induction signal that this group receiving coil receives, and after amplifier 1322 amplifies, this amplifying signal is sent to processing module 133.Processing module 133 comprises treatment circuit 1331, integrating circuit 1332 and sample circuit 1333.The treated circuit 1331 of amplification from receiver module 132 carries out after predetermined processing, by integrating circuit 1332 integration formation product sub-signals, and utilize the amplitude maximum of A/D sample circuit 1333 sampling integrated signals, picked up signal 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 organized the first coil for fixing M+1, scanning detects described the second coil, and the second coil corresponding to maximum signal amplitude value in described the second induction coil detecting is defined as to maximum the second coil; Then fixing described maximum the second coil, scanning detects described the first coil, detect maximum the first coil corresponding to maximum signal amplitude value obtaining in described the first induction coil, described maximum the first coil and described maximum the second coil are formed to the combination of signal maximum coil, and calculate the coordinate position of described time writer on described electromagnetic handwritten plate according to described signal maximum coil combination.Wherein, each, determine that the inductive coil of signal maximum scans in sense cycle, only need open one group of transmitting coil or one group of receiving coil, accumulative total scans M+N time, one group of transmitting coil that can picked up signal maximum and one group of receiving coil of signal maximum, final picked up signal maximum coil combination.Controller can calculate the coordinate position that obtains time writer according to described signal maximum coil combination.Its computing method are prior art, when controller obtains after described maximum coil combination, if described the first coil is distributed on directions X, described the second coil distributes in the Y direction, according to the signal amplitude of the first coil on directions X in described maximum coil combination and its two groups of signal amplitudes that coil detects in front and back, thereby carry out curve fitting, obtain the coordinate of directions X.The coordinate account form of Y-direction is identical.The coordinate obtaining in X and Y-direction just can be determined described time writer coordinate position.
The antenna plate 12 providing for the embodiment of the present invention, described controller 13 is carried out following functions: described controller 13 is organized the first coil for opening described M+1, scanning detects described the second coil, and the second coil corresponding to maximum signal amplitude value in described the second induction coil detecting is defined as to maximum the second coil.
Because described M+1 organizes the outer edge that the first coil is distributed in the effective district of demonstration of electromagnetic handwritten plate as shown in Figure 2, covered the effective display area of electromagnetic handwritten plate on a large scale, described time writer 11 positions one fix on described M+1 and organize within the scope of the delineation of the first coil.Therefore open after described M+1 organizes the first coil, scan the induced signal detecting on the second coil, the second coil corresponding to maximum signal amplitude value in the induced signal of detection is defined as to maximum the second coil.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 the second coil, and the second coil corresponding to maximum signal amplitude value in described the second induction coil detecting is defined as to maximum the second coil following two kinds of methods.
First method is: controller 13 is opened described M+1 and organized the first coil, and scanning detects N and organizes the second coil successively, and the second coil corresponding to maximum signal amplitude value that the N detecting is organized in the second induction coil is defined as maximum the second coil.
In first method, controller 13 is opened described M+1 and is organized after the first coil, can open successively one group of second coil, and scanning detects this and organizes the second induction coil, until all N organize the second coil all open after, can detect and obtain N and organize the second induction coil.Now, the second coil corresponding to maximum signal amplitude value that all N that detect organize in the second induction coil is exactly maximum the second coil, and the coordinate position of described time writer is near position in described maximum the second coil position or it just.
Second method is: described controller is used for opening described M+1 and organizes the first coil, every the scanning of S group, detects one group of second coil, and the second coil corresponding to maximum signal amplitude value in the second induction coil detecting is defined as to center the second coil; The 2S+1 that scanning detects centered by the second coil of described center successively organizes the second coil, the described 2S+1 detecting is organized to the second coil corresponding to maximum signal amplitude value in the second induction coil and be defined as maximum the second coil.
In the second approach, controller 13 is opened described M+1 and is organized after the first coil, can open one group of second coil scan detection every S group, and the second coil of such test section, can obtain part the second induction coil.Then, the second coil corresponding to maximum signal amplitude value in this part second induction coil is defined as to center the second coil, obviously, the coordinate position at described time writer place is near the second coil of described center, can not surpass described center the second coil left and right S group coil, a 2S+1 who fixes on centered by the second coil of described center organizes in the second coil.Now, controller 13 can scan successively the 2S+1 detecting centered by the second coil of described center and organizes the second coil.Like this, it is exactly that all N organize the maximum signal amplitude value in the second induction coil that the described 2S+1 detecting organizes maximum signal amplitude value in the second induction coil, the second coil corresponding to described this maximum signal amplitude value is exactly maximum the second coil, and the coordinate position of described time writer is just in described maximum the second coil position or near position it.
After having determined described maximum the second coil, described controller 13 is also for opening described maximum the second coil, scanning detects described the first coil, detect to obtain the signal maximum coil combination that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form, and combine and calculate the coordinate position of described time writer on described electromagnetic handwritten plate according to described signal maximum coil.
Controller 13 is determining that described maximum the second coil determined that time writer is behind the position at the second coil direction place, described controller 13 can fixedly be opened described maximum the second coil, described the first coil is scanned to detection, detection obtains maximum the first coil corresponding to maximum signal amplitude value in electromagnetic induction signal that described the first coil is corresponding, this maximum first coil and described maximum the second coil are formed to the combination of signal maximum coil, processor 1341 in controller 13 uses computing method of the prior art just can calculate according to described signal maximum coil combination and obtains the coordinate position of described time writer on described electromagnetic handwritten plate.
Described controller 13 is opened described maximum the second coil, scanning detects described the first coil, detects signal maximum coil that maximum the first coil corresponding to the maximum signal amplitude value that obtains in described the first induction coil and described maximum the second coil form and combines and have following two kinds of methods.
First method is: controller 13 is opened described maximum the second coil, scanning detects M and organizes the first coil successively, obtains maximum the first coil corresponding to maximum signal amplitude value that described M organizes in the first induction coil and combines with the signal maximum coil that described maximum the second coil forms.
In first method, controller 13 is opened after described maximum the second coil, can open successively one group of first coil, and scanning detects this and organizes the first induction coil, until all M organize the first coil all open after, can detect and obtain M and organize the first induction coil.Now, just obtain described M and organized the signal maximum coil combination that maximum the first coil corresponding to maximum signal amplitude value in the first induction coil and described maximum the second coil form.
Second method is: controller 13 is opened described maximum the second coil, every the scanning of T group, detects one group of first coil, and the first coil corresponding to maximum signal amplitude value in the first induction coil detecting is defined as to center the first coil; The 2T+1 that scanning detects centered by the first coil of described center successively organizes the first coil, obtains described 2T+1 and organizes maximum the first coil corresponding to maximum signal amplitude value in the first induction coil and combine with the signal maximum coil that described maximum the second coil forms.
In the second approach, controller 13 is opened after described maximum the second coil, can open one group of first coil scan detection every T group, and the first coil of such test section, can obtain part the first induction coil.Then, the first coil corresponding to maximum signal amplitude value in this part first induction coil is defined as to center the first coil, obviously, the coordinate position at described time writer place is near the first coil of described center, can not surpass described center the first coil left and right T group coil, a 2T+1 who fixes on centered by the first coil of described center organizes in the first coil.Now, controller 13 can scan successively the 2T+1 detecting centered by the second coil of described center and organizes the first coil.Like this, it is exactly that all M organize the maximum signal amplitude value in the first induction coil that the described 2T+1 detecting organizes maximum signal amplitude value in the first induction coil.Maximum the first coil that this maximum signal amplitude value is corresponding and described maximum the second coil form the combination of signal maximum coil, and described controller can calculate the coordinate position that obtains described time writer according to described signal maximum coil combination.
The first coil mentioned above can be transmitting coil, can be also receiving coil.When described the first coil is transmitting coil, described the second coil is receiving coil; When described the first coil is receiving coil, described the second coil is transmitting coil.
The embodiment of the present invention also provides a kind of coordinate location method, be applied to above-mentioned electromagnetism touch control device, described electromagnetism touch control device comprises time writer and electromagnetic handwritten plate, described electromagnetic handwritten plate comprises antenna plate and controller, described antenna plate, except being distributed with M organizing the first coil as in prior art and N organizing the second coil, also comprises that being distributed in the M+1 showing outside effective area edge organizes the first coil.Described M, N are greater than 0 integer, and described the first coil and described the second coil intersect 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, and the second coil corresponding to maximum signal amplitude value in described the second induction coil detecting is defined as to maximum the second coil.
Because described M+1 organizes the outer edge that the first coil is distributed in the effective district of demonstration of electromagnetic handwritten plate as shown in Figure 2, covered the effective display area of electromagnetic handwritten plate on a large scale, described time writer position one fixes on described M+1 and organizes within the scope of the delineation of the first coil.Therefore open after described M+1 organizes the first coil, scan the induced signal on described the second coil detecting, the second coil corresponding to maximum signal amplitude value in the induced signal of detection is defined as to maximum the second coil.The position of time writer touch-control is position in the position at maximum the second coil place or near it.
Optionally, the controller of described electromagnetism touch control device is opened described M+1 and is organized the first coil, scanning detects described the second coil, and the second coil corresponding to maximum signal amplitude value in described the second induction coil detecting is defined as to maximum the second coil following two kinds of methods.
First method is: the controller of electromagnetism touch control device is opened described M+1 and organized the first coil, scanning detects N and organizes the second coil successively, and the second coil corresponding to maximum signal amplitude value that the N detecting is organized in the second induction coil is defined as maximum the second coil.
In first method, the controller of electromagnetism touch control device is opened described M+1 and is organized after the first coil, can open successively one group of second coil, and scanning detects this and organizes the second induction coil, until all N organize the second coil all scanned after, can detect and obtain N and organize the second induction coil.Now, the second coil corresponding to maximum signal amplitude value that all N that detect organize in the second induction coil is exactly maximum the second coil, and the coordinate position of described time writer is near position in described maximum the second coil position or it just.
Second method is: the controller of electromagnetism touch control device is used for opening described M+1 and organizes the first coil, every the scanning of S group, detect one group of second coil, the second coil corresponding to maximum signal amplitude value in the second induction coil detecting is defined as to center the second coil; The 2S+1 that scanning detects centered by the second coil of described center successively organizes the second coil, the described 2S+1 detecting is organized to the second coil corresponding to maximum signal amplitude value in the second induction coil and be defined as maximum the second coil.
In the second approach, the controller of electromagnetism touch control device is opened described M+1 and is organized after the first coil, can open one group of second coil scan detection every S group, and the second coil of such test section, can obtain part the second induction coil.Then, the second coil corresponding to maximum signal amplitude value in this part second induction coil is defined as to center the second coil, obviously, the coordinate position at described time writer place is near the second coil of described center, can not surpass described center the second coil left and right S group coil, a 2S+1 who fixes on centered by the second coil of described center organizes in the second coil.Now, controller 13 can scan successively the 2S+1 detecting centered by the second coil of described center and organizes the second coil.Like this, it is exactly that all N organize the maximum signal amplitude value in the second induction coil that the described 2S+1 detecting organizes maximum signal amplitude value in the second induction coil, the second coil corresponding to described this maximum signal amplitude value is exactly maximum the second coil, the orientation that the coordinate position of described time writer just distributes at described maximum the second coil.
302, open described maximum the second coil, scanning detects described the first coil, obtain the signal maximum coil combination that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form, and calculate the coordinate position of described time writer on described electromagnetic handwritten plate according to described signal maximum coil combination.
The controller of electromagnetism touch control device is determining that described maximum the second coil determined behind the position at time writer place in the second coil direction, the controller of electromagnetism touch control device can fixedly be opened described maximum the second coil, described the first coil is scanned to detection, detection obtains maximum the first coil corresponding to maximum signal amplitude value in the signal amplitude of the electromagnetic induction signal that described the first coil is corresponding, this maximum first coil and described maximum the second coil are formed to the combination of signal maximum coil, and use computing method of the prior art just can calculate the coordinate position of described time writer on described electromagnetic handwritten plate according to described signal maximum coil combination.
Optionally, the controller of electromagnetism touch control device is opened described maximum the second coil, scanning detects described the first coil, detects signal maximum coil that maximum the first coil corresponding to the maximum signal amplitude value that obtains in described the first induction coil and described maximum the second coil form and combines and have 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 maximum the first coil corresponding to maximum signal amplitude value that described M organizes in the first induction coil and combines with the signal maximum coil that described maximum the second coil forms.
In first method, the controller of electromagnetism touch control device is opened after described maximum the second coil, can open successively one group of first coil, and scanning detects this and organizes the first induction coil, until all M organize the first coil all open scanned after, can detect and obtain M and organize the second induction coil.Now, just obtain described M and organized the signal maximum coil combination that maximum the first coil corresponding to maximum signal amplitude value in the first induction coil and described maximum the second coil form.
Second method is: the controller of electromagnetism touch control device is opened described maximum the second coil, every the scanning of T group, detects one group of first coil, and the first coil corresponding to maximum signal amplitude value in the first induction coil detecting is defined as to center the first coil; The 2T+1 that scanning detects centered by the first coil of described center successively organizes the first coil, obtains described 2T+1 and organizes maximum the first coil corresponding to maximum signal amplitude value in the first induction coil and combine with the signal maximum coil that described maximum the second coil forms.
In the second approach, the controller of electromagnetism touch control device is opened after described maximum the second coil, can open one group of first coil scan detection every T group, and the first coil of such test section, can obtain part the first induction coil.Then, the first coil corresponding to maximum signal amplitude value in this part first induction coil is defined as to center the first coil, obviously, the coordinate position at described time writer place is near the first coil of described center, can not surpass described center the first coil left and right T group coil, a 2T+1 who fixes on centered by the first coil of described center organizes in the first coil.Now, controller 13 can scan successively the 2T+1 detecting centered by the second coil of described center and organizes the first coil.Like this, it is exactly that all M organize the maximum signal amplitude value in the first induction coil that the described 2T+1 detecting organizes maximum signal amplitude value in the first induction coil.Maximum the first coil that this maximum signal amplitude value is corresponding and described maximum the second coil form the combination of signal maximum coil, and described controller can calculate according to described signal maximum coil combination the coordinate position of described time writer.
The first coil described in this method can be transmitting coil, can be also receiving coil.When described the first coil is transmitting coil, described the second coil is receiving coil; When described the first coil is receiving coil, described the second coil is transmitting coil.
Electromagnetism touch control device and coordinate location method that application invention embodiment provides, when the coordinate position of described time writer is positioned, at most only need scanning to detect M+N time, and for M*N time of the prior art, the number of times of scanning has reduced.In the coil number of antenna plate increasing today, application the present invention can reduce scanning times widely, thereby reduces sweep time, improves the coordinate setting speed of time writer in electromagnetism touch control device, solves that touch point is lost, 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, by the M+1 arranging outside the effective area edge of demonstration that is distributed in described electromagnetic handwritten plate, organize the first coil in described antenna plate, then by first opening described M+1, organize the first coil, scanning detects described the second coil, and 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 signal maximum coil combination that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form, and calculate the coordinate position of described time writer on described electromagnetic handwritten plate according to described signal maximum coil combination, so fixedly open a newly-increased coil, scanning detects the second coil, after determining maximum the second coil, fixedly open described maximum the second coil, scanning detects 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, solution touch point is lost, the phenomenon of time delay location.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of programmed instruction, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; 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, comprise time writer and electromagnetic handwritten plate, described electromagnetic handwritten plate comprises that being distributed with M organizes antenna plate and the controller that the first coil and N organize the second coil, and described M, N are greater than 0 integer, and described the first coil and described the second coil intersect vertically; It is characterized in that,
Described antenna plate also comprises that the M+1 outside the effective area edge of demonstration that is distributed in described electromagnetic handwritten plate organizes the first coil;
Described controller is used for opening described M+1 and organizes the first coil, and scanning detects described the second coil, and the second coil corresponding to maximum signal amplitude value in described the second induction coil detecting is defined as to maximum the second coil;
Described controller is also for opening described maximum the second coil, scanning detects described the first coil, obtain the signal maximum coil combination that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form, and calculate the coordinate position of described time writer on described electromagnetic handwritten plate according to described signal maximum coil combination.
2. electromagnetism touch control device according to claim 1, it is characterized in that, described controller is used for opening described M+1 and organizes the first coil, scanning detects described 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 and specifically comprises:
Open described M+1 and organize the first coil, scanning detects N and organizes the second coil successively, and the second coil corresponding to maximum signal amplitude value that the N detecting is organized in the second induction coil is defined as maximum the second coil;
Described controller is also for opening described maximum the second coil, scanning detects described the first coil, obtains signal maximum coil that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form and combines and specifically comprise:
Open described maximum the second coil, scanning detects M and organizes the first coil successively, obtains maximum the first coil corresponding to maximum signal amplitude value that described M organizes in the first induction coil and combines with the signal maximum coil that described maximum the second coil forms.
3. electromagnetism touch control device according to claim 1 and 2, it is characterized in that, described controller is used for opening described M+1 and organizes the first coil, scanning detects described 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 and specifically also comprises:
Described controller is used for opening described M+1 and organizes the first coil, every the scanning of S group, detects one group of second coil, and the second coil corresponding to maximum signal amplitude value in the second induction coil detecting is defined as to center the second coil; The 2S+1 that scanning detects centered by the second coil of described center successively organizes the second coil, the described 2S+1 detecting is organized to the second coil corresponding to maximum signal amplitude value in the second induction coil and be defined as maximum the second coil, described S is more than or equal to 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, scanning detects described the first coil, obtains signal maximum coil that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form and combines and specifically also comprise:
Described controller, also for opening described maximum the second coil, detects one group of first coil every the scanning of T group, and the first coil corresponding to maximum signal amplitude value in the first induction coil detecting is defined as to center the first coil; The 2T+1 that scanning detects centered by the first coil of described center successively organizes the first coil, obtain described 2T+1 and organize the signal maximum coil combination that maximum the first coil corresponding to maximum signal amplitude value in the first induction coil and described maximum the second coil form, described T is more than or equal to 1 integer.
5. according to the electromagnetism touch control device described in claim 1～4 any one, it is characterized in that, described the first coil is transmitting coil, and described the second coil is receiving coil; Or described the second coil is transmitting coil, described the first coil is receiving coil.
6. a coordinate location method, be applied to a kind of electromagnetism touch control device, described electromagnetism touch control device comprises time writer and electromagnetic handwritten plate, described electromagnetic handwritten plate comprises that being distributed with M organizes antenna plate and the controller that the first coil and N organize the second coil, described M, N are greater than 0 integer, and described the first coil and described the second coil intersect vertically; It is characterized in that, outside described antenna plate shows effective area edge, lay M+1 and organize the first coil, described method comprises:
Open described M+1 and organize the first coil, scanning detects described the second coil, and 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 described maximum the second coil, scanning detects described the first coil, obtain the signal maximum coil combination that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form, and calculate the coordinate position of described time writer on described electromagnetic handwritten plate according to described signal maximum coil combination.
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, the second coil corresponding to maximum signal amplitude value in described the second induction coil detecting is defined as to 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, and the second coil corresponding to maximum signal amplitude value that the N detecting is organized in the second induction coil is defined as maximum the second coil;
Describedly open described maximum the second coil, scanning detects described the first coil, obtains signal maximum coil that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form and combines and specifically comprise:
Open described maximum the second coil, scanning detects M and organizes the first coil successively, obtains maximum the first coil corresponding to maximum signal amplitude value that described M organizes in the first induction coil and combines with the signal maximum coil that described maximum the second coil forms.
8. according to the method described in claim 6 or 7, it is characterized in that,
Describedly open described M+1 and organize the first coil, scanning detects described 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 and specifically also comprises:
Open described M+1 and organize the first coil, every the scanning of S group, detect one group of second coil, the second coil corresponding to maximum signal amplitude value in the second induction coil detecting is defined as to center the second coil; The 2S+1 that scanning detects centered by the second coil of described center successively organizes the second coil, the described 2S+1 detecting is organized to the second coil corresponding to maximum signal amplitude value in the second induction coil and be defined as maximum the second coil, 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, obtains signal maximum coil that maximum the first coil corresponding to maximum signal amplitude value in described the first induction coil and described maximum the second coil form and combines and specifically also comprise:
Open described maximum the second coil, every the scanning of T group, detect one group of first coil, the first coil corresponding to maximum signal amplitude value in the first induction coil detecting is defined as to center the first coil; The 2T+1 that scanning detects centered by the first coil of described center successively organizes the first coil, obtain described 2T+1 and organize the signal maximum coil combination that maximum the first coil corresponding to maximum signal amplitude value in the first induction coil and described maximum the second coil form, described T is more than or equal to 1 integer.
10. according to the method described in claim 6～9 any one, it is characterized in that,
Described the first coil is transmitting coil, and described the second coil is receiving coil; Or described the second coil is transmitting coil, described the first coil is receiving coil.
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