CN103793122B - Electromagnetic touch-control device and electromagnetic touch method - Google Patents
Electromagnetic touch-control device and electromagnetic touch method Download PDFInfo
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Abstract
The present invention provides a kind of electromagnetic touch-control device, it includes antenna plate (1), control processing unit (10) and detection judging unit (11), antenna plate (1) is provided with transmission coil and receiving coil, send coil for sending electromagnetic wave to time writer (2), the resonance signal that receiving coil produces after being used for receiving time writer (2) and sending the electromagnetic wave resonance that coil sends, control processing unit (10) to be used for controlling send coil and receiving coil transmission and receive signal, and receiving coil received signal is processed, detection judging unit (11) is used for detecting the relative position judging time writer (2) with described antenna plate (1), and the positional information of time writer (2) is sent to described control processing unit (10)；Control processing unit (10) and set transmit power and the sensing threshold value of described receiving coil of described transmission coil according to described time writer (2) with the relative position of described antenna plate (1).
Description
Technical field
The present invention relates to electromagnetic touch technology, particularly relate to electromagnetic touch-control device and electromagnetic touch method.
Background technology
Electromagnetic handwritten technology makes its using effect with pen, pencil etc. very because of performance that its precision and pressure sensitivity etc. is unique
Close, therefore suffer from the favor of numerous user and company.The ultimate principle of electromagnetic handwritten technology is to utilize to have resonance circuit
When time writer moves in antenna plate, resonance circuit is sent, by antenna plate, excitation of electromagnetic wave that coil sends and releases electromagnetism and believe
Number, and receive this electromagnetic signal by the receiving coil of antenna plate.
Fig. 1 is the structural representation that existing electromagnetic handwritten plate sends coil.As it is shown in figure 1, this handwriting pad includes multiple
Sending coil X1、X2、X3、X4……XJ、XK、XL、XM, each transmission coil X1、X2、X3、X4……XJ、XK、XL、XMRespectively by each
Control switch Y1、Y2、Y3、Y4……YJ、YK、YL、YMControl its conducting and close, and the outfan P of each transmission coil1、
P2、P3、P4……PJ、PK、PL、PMAll it is shorted to together, and is connected on a load resistance R.R is the least for this load resistance,
The electric current flowing through electromagnetic induction coil is the biggest, and corresponding electromagnetic induction energy is the biggest, and the sensing of time writer is the highest, looks for pen speed degree
The fastest.Therefore, in a lot of designs, in order to increase the sensing height of time writer and look for pen speed degree, generally this load resistance R is set
Fixed is the least.Further, in order to shield noise information, it is normally set up a threshold value, when the energy of time writer is more than this threshold value
Handwriting information just can be detected.In this case, in order to avoid produce lose a phenomenon, need also exist for reduce load resistance R with
Increase the energy of pen.
But, along with the reduction of load resistance R, the electric current flowing through electromagnetic induction coil increases, and this can make power consumption increase,
Impact on mobile digital equipment is the biggest.
Additionally, due to prior art typically uses fixing threshold value, thus followability of identifying the handwriting produces impact.This be because of
For: 1) when pen quickly uses, the inductive energy of pen can diminish, may produce and lose a phenomenon, when i.e. pen normally uses but without
Faxian illustrates person's handwriting.2) when pen leaves its induction zone, because individual noise has been played certain amplification by the use of pen, and pen
Energy but reducing, so when pen leaves induction zone, have noise spot once in a while and exist.
Summary of the invention
The present invention is in view of problem above, it is provided that a kind of electromagnetic touch-control device with low-power consumption and high person's handwriting followability with
And a kind of reduce electromagnetic touch-control device power consumption and improve person's handwriting followability method.
An aspect of of the present present invention provides a kind of electromagnetic touch-control device (100), and it includes antenna plate (1), controls processing unit
(10) and detection judging unit (11), described antenna plate (1) is provided with transmission coil and receiving coil, and described transmission coil is used for
Sending electromagnetic wave to time writer (2), described receiving coil is used for receiving time writer (2) and sending the electromagnetic wave resonance that coil sends
The resonance signal of rear generation, described control processing unit (10) is used for controlling described transmission coil and receiving coil sends and receives
Signal, and described receiving coil received signal is processed, described detection judging unit (11) is used for detecting judgement electromagnetism
The relative position of pen (2) and described antenna plate (1), and the positional information of time writer (2) is sent to described control processing unit
(10)；Described control processing unit (10) sets described sending out according to described time writer (2) with the relative position of described antenna plate (1)
The transmit power of sending coil and the sensing threshold value of described receiving coil.
Another aspect of the present invention provides a kind of electromagnetic touch method, is used for reducing calutron (100) power consumption and improving
Person's handwriting followability, described electromagnetic touch-control device includes antenna plate (1) and controls processing unit (10), and described antenna plate sets on (1)
Being equipped with transmission coil and receiving coil, described transmission coil is for sending electromagnetic wave to time writer (2), and described receiving coil is used for
The resonance signal produced after receiving time writer (2) and sending the electromagnetic wave resonance that coil sends；Control processing unit (10) to be used for
Control described transmission coil and receiving coil send and receives signal, and described receiving coil received signal is processed,
This electromagnetic touch method comprises the following steps:
Detection judges the state of described time writer (2)；
Set the transmit power of described transmission coil with the relative position of described antenna plate (1) according to described time writer (2)
Sensing threshold value with described receiving coil.
Electromagnetic touch-control device that the present invention provides and electromagnetic touch method, by when time writer is in different conditions,
Use different induction coil transmit powers and receiving coil sensing threshold value, ensure electromagnetic touch-control device sensing height and
On the premise of sensing speed, reduce the power consumption of electromagnetic touch-control device and improve person's handwriting followability.
Accompanying drawing explanation
Fig. 1 is the structural representation that existing electromagnetic handwritten plate sends coil；
Fig. 2 is the structural representation of the electromagnetic touch-control device of one embodiment of the present invention；
Fig. 3 is the structural representation sending coil of electromagnetic touch-control device shown in Fig. 2；
Fig. 4 is the flow chart of a work process of electromagnetic touch-control device shown in Fig. 2.
Detailed description of the invention
For making those skilled in the art be more fully understood that technical scheme, below in conjunction with the accompanying drawings and specific embodiment party
The electromagnetic touch-control device that the present invention is provided by formula is described in detail.
Fig. 2 is the structural representation of the electromagnetic touch-control device of one embodiment of the present invention.As in figure 2 it is shown, the present embodiment
The electromagnetic touch-control device 10 provided includes antenna plate 1, controls processing unit 10, detection judging unit 11 and speed detection unit
12.It is provided with transmission coil and receiving coil in antenna plate 1, sends coil for sending electromagnetic wave, receiving coil to time writer 2
The resonance signal produced after the electromagnetic wave resonance receiving time writer 2 and send coil transmission, controls processing unit 10 and is used for
Control to send coil and receiving coil sends and receives signal, and receiving coil received signal is processed.
Detection judging unit 11 is for detecting the state judging time writer 2, and the status information of time writer 2 is sent to control
Processing unit 10 processed.Control processing unit 10 and set transmit power and the reception sending coil according to the current state of time writer 2
The sensing threshold value of coil.Such as, when time writer 2 resonance signal is more weak, increase the transmit power sending coil, and at time writer
When 2 resonance signals are stronger, reduce the transmit power sending coil；When noise is bigger, increase the sensing threshold value of receiving coil, and
The sensing threshold value of receiving coil is reduced when noise is less.
The state of time writer 2 is associated with the relative position of antenna plate 1 with time writer 2, such as, in the present embodiment, and root
According to time writer with the relative position of antenna plate 1 by the state demarcation of time writer 2 it is: pen enters, pen is unsettled, pen is depressed and pen is lifted
Rise.
Here, so-called " pen entrance " refers at time writer 2 close to during antenna plate 1, and antenna plate 1 initially senses electricity
One state of magnetic pen 2.This state can be first coordinate points initially sensing time writer 2, it is also possible to be initial sensing
Several coordinate points after time writer 2, it is also possible to be the time of after initially sensing time writer 2 several milliseconds, it is also possible to be high
Situation in certain sensing height.Such as, this state can be not detected by by the last scanning antenna plate 1 of detection judging unit 11
The mode that time writer 2 and this scanning antenna plate 1 detect time writer 2 judges.
So-called " pen is unsettled " refers to the state that time writer 2 is between " pen entrance " and " pen pressure ", the i.e. pen of time writer 2
Point is not exposed to display screen.Such as, when detection judging unit 11 previous moment judges that time writer 2 is in " pen entrance ", and work as
Detection of front moment judging unit 11 detects an information, but when being not detected by pressure, then judge that time writer 2 is in that " pen hangs
Empty ".
So-called " pen press-in " refers to time writer 2 and is pressed in electromagnetic touch-control device 100, the state of person's handwriting occurs.Detection
By pressure, judging unit 11 judges whether time writer 2 is in pen press-in state, i.e. then judge at time writer when there being pressure
It is pressed into state in pen, otherwise is not.
So-called " pen lifts " refers to time writer 2 and becomes leaving electromagnetic touch dress from being pressed in electromagnetic touch-control device 100
Put the process of 100.Such as, when detection judging unit 11 judges that previous moment time writer 2 has pressure, and current time does not has pressure
Time, then judge that time writer 2 is in " pen lifts "
Speed detection unit 12 is for when time writer 2 is in pen press-in state, and detection time writer 2 is in electromagnetic touch-control device
Translational speed transmission on 100 extremely control processing unit 10.Control the processing unit 10 shifting according to detected time writer 2
Dynamic velocity magnitude sets transmit power and the sensing threshold value of receiving coil sending coil.Such as, fast in time writer translational speed
Time, reduce the sensing threshold value of receiving coil, increase the sensing threshold value of receiving coil when translational speed is slower.
In the present embodiment, the translational speed maximum coil of time writer 2 changes number, coordinate difference or coordinate vector difference table
Levy.Here, maximum coil refers to the position of the maximum coil of antenna plate 1 inductive energy, and such as time writer 2 is positioned at antenna plate x
High order end, the coil x inductive energy of high order end is maximum, then maximum coil be x(such as, x is natural number)；The electricity that coordinate difference refers to
The coordinate difference of former and later two person's handwriting points (such as, X-direction or Y-direction) in some directions on magnetic contactor control device 100；Coordinate vector is poor
Refer in electromagnetic touch-control device 100 former and later two person's handwriting points at the phasor difference of phasor coordinate.
Although it should be noted that in the present embodiment, it is that pen enters, pen is unsettled, pen pressure by the state demarcation of time writer
Lower and pen lifts, but the dividing mode of time writer state is not limited to this in actual applications, such as can be as required by electricity
The state demarcation of magnetic pen is three kinds or five kinds and more than five kinds.
Fig. 3 is the structural representation sending coil of electromagnetic touch-control device shown in Fig. 2.As it is shown on figure 3, the electricity of the present embodiment
It is provided with many groups in the antenna plate 1 of magnetic contactor control device 100 and sends coil X1、X2、X3、X4……XJ、XK、XL、XM, each transmission line
The input of circle is respectively connected with a switch, control processing unit 10 by with each transmission coil X1、X2、X3、X4……XJ、
XK、XL、XMThe control switch Y being connected1、Y2、Y3、Y4……YJ、YK、YL、YMControl each transmission coil X1、X2、X3、X4……XJ、
XK、XL、XMConducting and closedown.The outfan P of all transmission coils1、P2、P3、P4……PJ、PK、PL、PMIt is shorted together, and
It is connected with the switching selector U of an one-to-many, by this switching selector U, transmission coil and in R1, R2, R3 can be made
Individual connection.In the present embodiment, R1 < R2 < R3.By making transmission coil connect from different loads, scalable sends coil
Size of current, thus regulate the size sending coil transmit power.
Although it should be noted that in the present embodiment, regulate the negative of transmission coil by arranging multiple optional load
Carry size, but be not limited to this mode, the most also can realize above-mentioned purpose by arranging the adjustable load of resistance sizes.
Fig. 4 is the flow chart of a work process of electromagnetic touch-control device shown in Fig. 2.In the present embodiment, coil is sent
Have three load R1, R2, R3 selective, the sensing threshold value of receiving coil has E1, E2, E3, E4, E5 selective, wherein R1 < R2 <
R3, E5 < E4 < E3 < E1 < E2.
As shown in Figure 4, when step S20 electromagnetic touch-control device 100 is started working, the most in the step s 21, detection judges
Unit 11 first determines whether whether time writer is in pen and enters state, if detection judging unit 11 judges that time writer 2 is in pen and enters
When entering state, then proceed to step S22.In step S22, control processing unit 10 and control switching selector U so that it is with impedance
Little load resistance R1 connects, and the sensing threshold value of receiving coil is set to second largest E1 simultaneously；Then continue at step S30,
Terminate this operating process.Looking for a stage because this stage is in, the R1 using load minimum can ensure that transmission coil has foot
Enough high transmit powers, so that the sensing of pen is the highest, does not interferes with simultaneously yet and look for pen speed degree.And due to when not having
When pen is close to magnetic board, all noise informations of information that receiving coil can receive, second largest threshold value E1 is selected at this
Can effectively get rid of noise information.
If detection judging unit 11 judges that time writer 2 is not in pen and enters state in the step s 21, then proceed to step
S23.In step S23, detection judging unit 11 detection judges whether time writer 2 is in a vacant state.If detection judges
Unit 11 judges when time writer 2 is in vacant state, then to proceed to step S24.In step s 24, control processing unit 10 to control
Switching selector U processed so that it is the load resistance R2 second largest with impedance is connected, and the sensing threshold value of receiving coil is set to simultaneously
First big E2.Then continue at step S30, terminate this operating process.
If detection judging unit 11 judges that in step S23 time writer 2 is not in a vacant state, then proceed to step
S25.In step s 25, the detection of detection judging unit 11 judges whether time writer 2 is in a depressed state.If detection judges
Unit 11 judges that time writer 2 is in a depressed state, then proceed to step S26.In step S26, speed detection unit 12 detects
The time writer 2 translational speed in electromagnetic touch-control device 100.Judge at the translational speed of time writer 2 when controlling processing unit 10
When low speed interval, control processing unit 10 the most in step s 27 and control switching selector U so that it is big with impedance first is negative
Carry resistance R3 to connect, the sensing threshold value of receiving coil is set as the third-largest E3 simultaneously；Electricity is judged when controlling processing unit 10
When the translational speed of magnetic pen 2 is in middling speed interval, controls processing unit 10 the most in step s 27 and control switching selector U so that it is
The load resistance R3 big with impedance first is connected, and the sensing threshold value of receiving coil is set as the second little E4 simultaneously；Work as control
Processing unit 10 judges when the translational speed of time writer 2 is in the most interval, controls processing unit 10 the most in step s 27 and controls
Switching selector U so that it is the load resistance R3 big with impedance first is connected, and the sensing threshold value of receiving coil is set as the most simultaneously
Little E5.Then continue at step S30, terminate this operating process.
The state that pen is pressed, therefore energy is can be only achieved owing to the pen press-in state of time writer 2 has to pass through unsettled process
Cumulative can reach maximum equilibrium valve, and this state be with time retention time the longest process, therefore by will be negative
Carry resistance to strengthen further, can longer with pen during keep relatively low power consumption.Simultaneously as pen in this process
Inductive energy is the most all much larger than noise energy, therefore can use less threshold value.And the translational speed institute according to time writer 2
Belonging to interval, the threshold size of respective settings receiving coil, to avoid generation to lose a phenomenon, improves person's handwriting followability.
If detection judging unit 11 judges that time writer 2 is not in a depressed state, then proceed to step in step s 25
S28.In step S28, detection judging unit 11 detection judges whether time writer 2 is in a lifting status.If detection judges
Unit 11 judges when time writer 2 is in lifting status, then to proceed to step S29.In step S29, control processing unit 10 and control
Switching selector U processed so that it is the load resistance R2 second largest with impedance is connected, and the sensing threshold value of receiving coil is set to simultaneously
First big E2.Then continue at step S30, terminate this operating process.
Because pen situation that is unsettled and that lift two states is substantially the same, and time writer sensing resonance under both states
Signal is relatively strong, the most in the present embodiment, uses identical set-up mode under both states, i.e. uses impedance second largest
Load resistance R2, so can reduce the electric current sending coil, thus reduce electromagnetic touch-control device 100 power consumption.Further, due to electricity
May there is the noise that energy is higher in magnetic pen 2, therefore the sensing threshold value at receiving coil uses first when leaving induction zone
Big E2.
Principle that embodiment of above is intended to be merely illustrative of the present and the illustrative embodiments that uses, but this
Bright it is not limited thereto.For those skilled in the art, in the feelings without departing from spirit and substance of the present invention
Under condition, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (6)
1. an electromagnetic touch-control device, it is characterised in that including:
Antenna plate (1), is provided with transmission coil and receiving coil, and described transmission coil is for sending electricity to time writer (2)
Magnetic wave, the resonance signal that described receiving coil produces after being used for receiving time writer (2) and sending the electromagnetic wave resonance that coil sends；
Controlling processing unit (10), it is used for controlling described transmission coil and receiving coil sends and receives signal, and to described
Receiving coil received signal processes；And
Detecting judging unit (11), it is used for detecting the relative position judging time writer (2) with described antenna plate (1), and by electricity
The positional information of magnetic pen (2) is sent to described control processing unit (10)；
Described control processing unit (10) sets described sending out according to described time writer (2) with the relative position of described antenna plate (1)
The transmit power of sending coil and the sensing threshold value of described receiving coil, wherein, described time writer (2) and described antenna plate (1)
Relatively position include that pen enters, pen is unsettled, pen pressure and pen lift at least one；
Speed detection unit (12), it is for when described time writer (2) is in depressed state, detecting described time writer (2)
Translational speed in described electromagnetic touch-control device transmission extremely described control processing unit (10)；
Described control processing unit (10) sets the transmission of described transmission coil according to the size of described time writer (2) translational speed
The sensing threshold value of power and described receiving coil.
2. electromagnetic touch-control device as claimed in claim 1, it is characterised in that the translational speed of described time writer (2) is maximum
Coil change number, coordinate difference or coordinate vector difference characterize.
3. the electromagnetic touch-control device as described in claim 1-2 any one, it is characterised in that described transmission coil and resistance can
The load adjusted connects or described transmission coil is connected with multiple different size of loads by switching selector；
Described control processing unit (10) sets described sending out according to described time writer (2) with the relative position of described antenna plate (1)
The size of sending coil load.
4. an electromagnetic touch method for electromagnetic touch-control device, described electromagnetic touch-control device includes that antenna plate (1) and control process
Unit (10), described antenna plate (1) is provided with transmission coil and receiving coil, and described transmission coil is for time writer (2)
Send electromagnetic wave, described receiving coil be used for receiving time writer (2) with send the electromagnetic wave resonance that coil sends after generation humorous
Shake signal；Control processing unit (10) to be used for controlling described transmission coil and receiving coil transmission and receiving signal, and to described
Receiving coil received signal processes, it is characterised in that this electromagnetic touch method comprises the following steps:
Detection judges the state of described time writer (2)；
Set transmit power and the institute of described transmission coil with the relative position of described antenna plate (1) according to described time writer (2)
Stating the sensing threshold value of receiving coil, wherein, described time writer (2) includes pen entrance, pen with the relative position of described antenna plate (1)
The pressure of unsettled, pen and pen lift at least one；
When detecting that described time writer (2) is in depressed state, detect described time writer (2) in described electromagnetic touch-control device
On translational speed, and set transmit power and the institute of described transmission coil according to the size of described time writer (2) translational speed
State the sensing threshold value of receiving coil.
5. electromagnetic touch method as claimed in claim 4, it is characterised in that the translational speed of described time writer (2) is maximum
Coil change number, coordinate difference or coordinate vector difference characterize.
6. the electromagnetic touch method as described in claim 4-5 any one, it is characterised in that send coil load by setting
The size of resistance sets the power of described transmission coil.
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| CN201210417990.XA CN103793122B (en) | 2012-10-26 | 2012-10-26 | Electromagnetic touch-control device and electromagnetic touch method |
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| CN201210417990.XA CN103793122B (en) | 2012-10-26 | 2012-10-26 | Electromagnetic touch-control device and electromagnetic touch method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104049830B (en) * | 2014-06-24 | 2017-07-18 | 北京汉王鹏泰科技有限公司 | For time writer and the exchange method of magnetic board |
| CN109597504B (en) * | 2019-01-16 | 2024-02-23 | 北京汉王鹏泰科技股份有限公司 | Variable capacitance type electromagnetic touch pen and touch system thereof |
| CN113358014B (en) * | 2020-03-06 | 2023-02-24 | 深圳普赢创新科技股份有限公司 | Electromagnetic induction type coordinate positioning device |
| CN112328129B (en) * | 2020-11-05 | 2023-07-18 | 深圳市绘王动漫科技有限公司 | Electromagnetic input device and electromagnetic input method for identifying interference |
| CN113703594B (en) * | 2021-08-31 | 2023-10-03 | 北京碧云数创科技有限公司 | Control method of input device |
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| CN101110009A (en) * | 2006-07-19 | 2008-01-23 | 蒂科电子加拿大有限公司 | Touch detection method and system for a touch sensor |
| CN101916155A (en) * | 2010-08-06 | 2010-12-15 | 汉王科技股份有限公司 | Electromagnetic type electronic reader with induction function and induction method thereof |
| CN101957706A (en) * | 2010-09-30 | 2011-01-26 | 汉王科技股份有限公司 | Electromagnetic handwritten device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4872113B2 (en) * | 2007-09-10 | 2012-02-08 | 株式会社ワコム | Position detection device |
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| CN101110009A (en) * | 2006-07-19 | 2008-01-23 | 蒂科电子加拿大有限公司 | Touch detection method and system for a touch sensor |
| CN101916155A (en) * | 2010-08-06 | 2010-12-15 | 汉王科技股份有限公司 | Electromagnetic type electronic reader with induction function and induction method thereof |
| CN101957706A (en) * | 2010-09-30 | 2011-01-26 | 汉王科技股份有限公司 | Electromagnetic handwritten device |
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Effective date of registration: 20240422 Address after: 100193 363, 3 floor, 5 building, 8 Northeast Road, Haidian District, Beijing. Patentee after: HANVON PENTECH Co. TTD Country or region after: China Address before: 100193 Hanwang Building 8, northeast Wang Xi Road, Haidian District, Beijing Patentee before: HANWANG TECHNOLOGY Co.,Ltd. Country or region before: China |
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