CN110262676A - A kind of resonance signal regulating device, time writer and electromagnetic handwritten screen system - Google Patents
A kind of resonance signal regulating device, time writer and electromagnetic handwritten screen system Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/038—Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry
- G06F3/0383—Signal control means within the pointing device
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
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Abstract
A kind of resonance signal regulating device, time writer and electromagnetic handwritten screen system, including tuner module, frequency detection module and control module.Tuner module generates wireless transmission signal and resonance signal according to frequency adjusting signals, frequency detection module generates frequency count signal according to resonance signal and reset signal, control module generates reset signal and frequency adjusting signals according to frequency count signal, the resonant parameter that adjust automatically tuner module generates is located at the first pre-set interval with the frequency for generating resonance signal, realize the automatic adjustment of resonance frequency, have adjusted the tranmitting frequency of active Electromagnetic pen, it avoids component parameters deviation and use environment factor will affect the resonant ring frequencies of time writer, the defect that writing position coordinate precision so as to cause time writer is low and pen pressure detection error is big, improve the resolution ratio that time writer writes pressure sensitivity precision and writing, it is accurate to write coordinate setting, write non-delay hangover, person's handwriting reduction degree is close to true person's handwriting, user experience is splendid.
Description
Technical field
The invention belongs to electronic information input equipment technical field more particularly to a kind of resonance signal regulating devices, electromagnetism
Pen and electromagnetic handwritten screen system.
Background technique
With the enhancing of people's environmental consciousness, continuous upgrading of all trades and professions to office mode, and modernization, informationization
The quickening of pace of construction, paperless office turn to industrialization by concept, are gradually applied to many fields.Especially in electronic equipment
Field, more and more electronic equipments use handwriting screen, such as meeting teaching electronic whiteboard, signature screen, Freehandhand-drawing screen, intelligent hand
Machine, tablet computer etc., these use the electronic equipment of hand-writing technique, and it is next defeated not used traditional hardware device (such as keyboard)
Enter information, but the time writer to match is used to be inputted.Electromagnetic handwritten screen system generally includes display screen, electromagnetic antenna mould
Group and on electromagnetic handwritten screen write or paint time writer.Electromagnetic handwritten screen utilizes electromagnetic induction technology, passes through electromagnetism
Electromagnetic antenna plate wireless interaction information below writing pencil and display screen is realized and writes or paint.
There are two types of types for existing writing pencil, and capacitive and inductive type is capacitive to be suitable for capacitance plate, the disadvantage is that without pressure
Sense, is unable to suspension procedure.Inductive type time writer is subdivided into active inductance pen and passive inductance pen, currently on the market active
Time writer mostly uses analog circuit, since there are deviations and use environment change to also result in component for component parameters itself
Parameters variation, it is poor so as to cause the resonance frequency consistency of time writer, influence the tranmitting frequency and resonance amplitude of time writer, therefore
May cause time writer can not match electromagnetic antenna plate (electromagnetic handwritten plate), cause the writing coordinate setting precision of time writer it is low and
Pen pressure detection error is big.
Therefore, there are manufal tuning frequency difficulty, resonance frequency in time writer production process are consistent for traditional technical solution
Property it is poor, in addition adverse circumstances (such as high temperature and humidity) or environmental factor variation (such as from low temperature environment to hot environment),
It is big to will lead to resonance frequency deviation, writes coordinate setting low precision, pressure sensitivity is ineffective, or even the problem of failure.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of resonance signal regulating device, time writer and electromagnetic handwritten screen systems
System, it is intended to solve in traditional technical solution there are manufal tuning frequency in time writer production process is difficult, resonance frequency is consistent
Property it is poor, in addition adverse circumstances (such as high temperature and humidity) or environmental factor variation (such as from low temperature environment to hot environment),
It is big to will lead to resonance frequency deviation, writes coordinate setting low precision, pressure sensitivity is ineffective, or even the problem of failure.
The first aspect of the embodiment of the present invention provides a kind of resonance signal regulating device, the resonance signal regulating device
Include:
For generating the tuner module of wireless transmission signal according to frequency adjusting signals.
It is connect with the tuner module, for generating the frequency of frequency count signal according to the resonance signal and reset signal
Rate detection module.
It is connect with the tuner module and the frequency detection module, for according to frequency count signal generation
Reset signal and the frequency adjusting signals, so that the resonance that the tuner module is generated according to the frequency adjusting signals
The frequency of signal is located at the control module of the first pre-set interval.
The resonance signal regulating device in one of the embodiments, further include:
It is connect with the tuner module and the control module, generates the first push button signalling and for inputting according to user
The key module of two push button signallings.
The tuner module, which is also used to generate frequency according to the frequency adjusting signals and first push button signalling, to be located at
The wireless transmission signal of second pre-set interval, and frequency position is generated according to the frequency adjusting signals and second push button signalling
In the wireless transmission signal of third pre-set interval.
The tuner module is also used to generate the resonance letter that frequency is located at the 4th pre-set interval in one of the embodiments,
Number.
The resonance signal regulating device further include:
It is connect with the tuner module, for generating resonance electricity according to the power supply enable signal and battery supply of the first level
First power conversion module in source.
The tuner module is specifically used for generating the wireless hair according to the resonant power and the frequency adjusting signals
Penetrate signal and the resonance signal.
The frequency detection module is also used to be generated according to the resonance signal into a wake-up signal.
The control module is also used to generate key according to first push button signalling or second push button signalling and call out
Wake up signal, and according to it is described enter a wake-up signal or the key wakeup signal generate the enabled letter of power supply of first level
Number.
The resonance signal regulating device in one of the embodiments, further include:
It is connect with the control module, for generating the charging protecting module for filling power detection signal according to charge power supply.
The control module is also used to fill the power supply enable signal that power detection signal generates second electrical level according to.
First power conversion module stops generating the resonance electricity according to the power supply enable signal of the second electrical level
Source.
The resonance signal regulating device in one of the embodiments, further include:
For generating the second source conversion module that power supply is the power supply of each functional module according to the battery supply.
The resonance signal regulating device in one of the embodiments, further include:
It is connect with the control module, for showing signal to charged state and work according to charging display signal and mode
The display module that state is shown.
The control module is also used to fill power detection signal according to and generates the charging display signal, and according to described
Power switching signals generate the mode and show signal.
In one of the embodiments, the frequency detection module include first comparator, first resistor, second resistance with
And first up counter.
It is described that the reverse input end of the noninverting input of the first comparator and the first comparator, which collectively forms,
The resonance signal input terminal of frequency detection module.The output end of the first comparator is that the pen that enters of the frequency detection module is called out
Awake signal output end.
The reset terminal of first up counter is the reset signal input terminal of the frequency detection module.
The first end of the output end of the first comparator and the first resistor and first up counter when
The connection of clock end, the second end of the first resistor are connect with the first power supply.
First up counter sets several ends, the first enable end of first up counter and described first
Second enable end of up counter is connect with first power supply, the 4th output end of first up counter with it is described
The first end of 5th resistance connects, and the second end of the second resistance is that the frequency count signal of the frequency detection module exports
End.
The tuner module includes the first analog switch, the second capacitor, third capacitor, the in one of the embodiments,
Four capacitors, the 5th capacitor, the 6th capacitor, the 7th capacitor, the 8th capacitor, the 9th capacitor, the tenth capacitor, the 11st capacitor, the 7th
Resistance, the 8th resistance, the 9th resistance, the tenth resistance, the first inductance and the first triode.
The first end of second capacitor is connect with resonant power, and the second end of second capacitor is connect with power ground.
First end, the first end of first inductance, the first end of the third capacitor, described of 7th resistance
First common end of one analog switch and the second common end of first analog switch are connect with the resonant power, described
The second end of 7th resistance and the first end of the 9th capacitor and first end and the one or three pole of the 8th resistance
The base stage of pipe connects, the second end of the 9th capacitor and second end, the second end of the tenth resistance of the 8th resistance
And the second end of the 11st capacitor is connect with power ground, the emitter of first triode and the 9th resistance
First end connection, the second end and the first end of the tenth resistance and the first end of the 11st capacitor of the 9th resistance
Connection, the second end of first inductance are connect with the collector of the second end of the third capacitor and first triode,
The second of 4th capacitor is calculated and connect with the first end of the second end of the third capacitor and the tenth capacitor, and the described tenth
The second end of capacitor is connect with the first end of the 11st capacitor.
First digital control end of first analog switch and the second digital control end of first analog switch are total
With the frequency adjusting signals input terminal for being configured to the tuner module.
The power end of first analog switch is connect with second source, the first normal-closed end of first analog switch with
The first end of 5th capacitor connects, and the first end of the first normally open end of first analog switch and the 6th capacitor connects
It connects, the second normally open end of first analog switch is connect with the first end of the 7th capacitor, first analog switch
Second normal-closed end is connect with the first end of the 8th capacitor, and the second of the second end of the 5th capacitor, the 6th capacitor
The second end at end, the second end of the 7th capacitor and the 8th capacitor is connect with the second end of the 4th capacitor.
The second end of 8th capacitor and the first common end of first analog switch and first simulation are opened
The second common end closed collectively forms the resonance signal output end for the tuner module.
The control module includes microprocessor, the 6th resistance and first capacitor in one of the embodiments,.
The microprocessor reset end is connect with the first end of the first end of the 6th resistance and the first capacitor, institute
The second end for stating first capacitor is connect with power ground, and the second end of the 6th resistance is connect with third power supply.
The analog power end of the microprocessor is connect with the third power supply, the power end of the microprocessor with it is described
The connection of third power supply, the ground terminal of the microprocessor are connect with power ground.
First data input/output terminal of the microprocessor is the key wakeup signal input part of the control module.
Second data input/output terminal of the microprocessor is the reset signal output end of the control module.
The third data input/output terminal of the microprocessor is the enabled letter of power supply of the first level of the control module
The power supply enable signal output end of number output end and the second electrical level of the control module.4th data of the microprocessor are defeated
The 5th data input/output terminal for entering output end and the microprocessor, which collectively forms, adjusts letter for the frequency of the control module
Number output end.
6th data input/output terminal of the microprocessor be the control module charging show signal output end and
The mode of the control module shows signal output end.
7th data input/output terminal of the microprocessor is the frequency count signal input terminal of the control module.
8th data input/output terminal of the microprocessor is that the charging of the control module detects signal input part.
9th data input/output terminal of the microprocessor enters a wake-up signal input terminal for the control module.
The second aspect of the embodiment of the present invention provides a kind of time writer, and the time writer includes resonance as described above
Digital regulating device.
The third aspect of the embodiment of the present invention provides a kind of electromagnetic handwritten screen system, including with transmit coil and reception
The electromagnetic handwritten screen of coil, the electromagnetic handwritten screen system further include time writer as described above.
The embodiment of the present invention generates wireless transmission signal and resonance signal, frequency according to frequency adjusting signals by tuner module
Rate detection module generates frequency count signal according to resonance signal and reset signal, and control module is generated according to frequency count signal
Reset signal and frequency adjusting signals, so that the frequency for the resonance signal that tuner module is generated according to frequency adjusting signals is located at the
One pre-set interval can be realized the automatic adjustment of resonance frequency, have adjusted the tranmitting frequency of active Electromagnetic pen, avoid environment because
The parameter that element will lead to component changes, and changes so as to cause the tranmitting frequency of time writer, and then lead to time writer
The defect that writing position coordinate precision is low and pen pressure detection error is big, improve time writer and write pressure sensitivity precision, improve time writer
The resolution ratio of writing, time writer writing coordinate setting is accurate, writes non-delay hangover, and person's handwriting reduction degree is used close to true person's handwriting
Family Experience Degree is splendid, improves reliability.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is a kind of a kind of structural schematic diagram for resonance signal regulating device that one embodiment of the invention provides；
Fig. 2 is a kind of another structural schematic diagram for resonance signal regulating device that one embodiment of the invention provides；
Fig. 3 is a kind of another structural schematic diagram for resonance signal regulating device that one embodiment of the invention provides；
Fig. 4 is a kind of another structural schematic diagram for resonance signal regulating device that one embodiment of the invention provides；
Fig. 5 is a kind of another structural schematic diagram for resonance signal regulating device that one embodiment of the invention provides；
Fig. 6 is a kind of another structural schematic diagram for resonance signal regulating device that one embodiment of the invention provides；
Fig. 7 is a kind of exemplary circuit schematic diagram for resonance signal regulating device that one embodiment of the invention provides.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, a kind of structural schematic diagram of resonance signal regulating device provided in an embodiment of the present invention, for the ease of
Illustrate, only the parts related to this embodiment are shown, and details are as follows:
A kind of resonance signal regulating device, including tuner module 11, frequency detection module 12, control module 13.
Tuner module 11 is used to generate wireless transmission signal and resonance signal according to frequency adjusting signals.
Frequency detection module 12 is connect with tuner module 11, for generating frequency counting according to resonance signal and reset signal
Signal.
Control module 13 is connect with tuner module 11 and frequency detection module 12, clear for being generated according to frequency count signal
Zero-signal and frequency adjusting signals, so that the frequency for the resonance signal that tuner module 11 is generated according to frequency adjusting signals is located at the
One pre-set interval.
In specific implementation, after time writer is powered on or resetted during program initialization, control module 13 is according to frequency counting
Signal generates reset signal and frequency adjusting signals, so that the resonance signal that tuner module 11 is generated according to frequency adjusting signals
Frequency is located at the first pre-set interval.The wireless signal that resonance modules 11 emit is by electromagnetic screen or Electromagnetic hand with dispatch coil
It writes screen reception, electromagnetic screen or electromagnetic handwritten screen and resonance frequency and electromagnetic intensity is parsed according to resonance signal, realization is sat
Cursor position positions and shows and execute corresponding function action.First pre-set interval is with electromagnetic screen or electromagnetic handwritten screen
Certain frequency range centered on predeterminated frequency f0 then enters pen writing when the frequency of resonance signal is closer to predeterminated frequency f0
Response sensitivity and pressure sensitivity precision are higher, pressure sensitivity information, that is, Z-direction information, and person's handwriting is thick when being presented as writing
Thin degree.Frequency detection module 12 is accomplished that the resonance frequency generated to tuner module 11 is detected and generates frequency counting
Signal feeds back to control module 13, realizes self feed back corrective action, improves frequency tuning precision.
The resonance that the embodiment of the present invention is generated by tuner module, frequency detection module and control module shape twin installation
The circuit that frequency is measured in real time, feeds back and adjusts, realize enter pen write before to time writer generate resonance frequency into
Row self feed back and adjusting are to obtain the predeterminated frequency value close to electromagnetic screen or electromagnetic handwritten screen, by adjusting automatically before entering pen writing
The whole tranmitting frequency of active Electromagnetic pen, avoiding environmental factor will affect the parameter of component, so as to cause time writer is influenced
Tranmitting frequency so that resonance frequency consistency is poor, and then cause the writing writing position coordinate precision of time writer low and pen pressure
The big defect of detection error, improves the resolution ratio of time writer pressure sensitivity precision and time writer writing, and time writer writes coordinate setting
Accurately, non-delay hangover is write, for person's handwriting reduction degree close to true person's handwriting, user experience is splendid, improves reliability.
Referring to Fig. 2, resonance signal regulating device further includes key module 14 in one of the embodiments,.
Key module 14 is connect with tuner module 11 and control module 13, generates the first key letter for inputting according to user
Number and the second push button signalling.
Tuner module 11, which is also used to generate frequency according to frequency adjusting signals and the first push button signalling, is located at the second preset areas
Between wireless transmission signal, and the nothing that frequency is located at third pre-set interval is generated according to frequency adjusting signals and the second push button signalling
Line emits signal.
In specific implementation, frequency is located at the wireless transmission signal of the second pre-set interval, frequency is located at third pre-set interval
Wireless transmission signal and frequency are located at the first pre-set interval resonance signal, and the corresponding predeterminated frequency section of three signals is variant,
Namely the wireless transmission signal that generates of key module 14 frequency and writing when the frequency of resonance signal that generates not in an area
Between, therefore electromagnetic screen or the reception of electromagnetic handwritten screen handle both wireless transmission signals and resonance signal and will not interact, no
There are erroneous judgements, improve the precision and reliability write and controlled.Optionally, electromagnetic screen or electromagnetic handwritten screen are according to wireless transmission
Signal carries out corresponding feature operation, such as the cursor control operation function similar to mouse.
The embodiment of the present invention realizes Radio Control Function by key module combination tuner module, enriches the function of time writer
It can effect.
Referring to Fig. 3, tuner module 11 is also used to be located at according to pressure sensitivity signal generation frequency in one of the embodiments,
The resonance signal of 4th pre-set interval.
Resonance signal regulating device further includes the first power conversion module 101.
First power conversion module 101 is connect with tuner module 11, for according to the power supply enable signal of the first level and
Battery supply generates resonant power.
Tuner module 11 is specifically used for generating wireless transmission signal according to resonant power and frequency adjusting signals and resonance is believed
Number.
Frequency detection module 12 is also used to be generated according to resonance signal into a wake-up signal.
Control module 13 is also used to generate key wakeup signal, and root according to the first push button signalling or the second push button signalling
According to the power supply enable signal for entering a wake-up signal or key wakeup signal the first level of generation.
In specific implementation, enter electromagnetic screen or electromagnetic handwritten screen from deep sleep in resonance signal regulating device
When within the scope of aerial radiation namely time writer enters the field region of electromagnetic screen or electromagnetic handwritten screen, passes through tuner module 11
The resonance signal that frequency is located at the 4th pre-set interval is generated according to electromagnetic induction characteristic；Frequency detection module 12 is according to the frequency position
It generates in the resonance signal of the 4th pre-set interval into wake-up signal and is sent to control module 13；Control module 13 is according to first
Perhaps the second push button signalling generates key wakeup signal and raw according to a wake-up signal or key wakeup signal is entered to push button signalling
At the power supply enable signal of the first level, the power supply enable signal of optional first level is the power supply enable signal of high level；
First power conversion module 101 generates resonant power to tuner module 11 according to the power supply enable signal and battery supply of high level
Power supply so that tuner module 11 enters working condition, and generates wireless transmission signal according to resonant power and frequency adjusting signals
And resonance signal.
The present embodiment, which passes through, to be made only entering electromagnetic screen or electromagnetic handwritten screen into pen wake-up or key wakeup signal
Aerial radiation range when just wake up control module, with control the first power conversion module battery supply is converted into resonant power
Enter working condition for tuner module power supply, being constantly in working condition so as to avoid tuner module causes a large amount of energy to damage
Consumption, the device operation power consumption of the embodiment of the present invention is less than 1 milliampere after tested, and stand-by power consumption is less than 10 microamperes, so that active Electromagnetic
Pen can be realized super long standby time.
Referring to Fig. 4, resonance signal regulating device further includes charging protecting module 100 in one of the embodiments,.
Charging protecting module 100 is connect with control module 13, for filling power detection signal according to charge power supply generation.
Control module 13 is also used to according to the power supply enable signal for filling power detection signal generation second electrical level.
First power conversion module 101 stops generating resonant power according to the power supply enable signal of second electrical level.
In specific implementation, optionally, the power supply enable signal of second electrical level is low level power supply enable signal.Work as charging
Protective module 100 detects that power detection signal is filled in battery generation of charging, and control module 13 fills power detection signal according to charging
The stopping of the first power conversion module 101 is controlled, battery supply is converted into resonant power and is powered to tuner module 11, namely ought not
Need to carry out to close the power supply of tuner module 11 when resonance, cell voltage is unstable when avoiding charging leads to resonant power not
Stablize the influence to the component of tuner module 11, realize and tuner module 11 is protected in charging, improves device and filling
Safety and reliability when electric.
Referring to Fig. 5, resonance signal regulating device further includes second source conversion module in one of the embodiments,
102。
Second source conversion module 102 is used to generate power supply according to battery supply as the power supply of each functional module.
By being provided separately power supply to tuner module and other function module, only when needing resonant operational to tuning
Module powers on, and according to do not have to functional module different power demands different power supply modules is set, it is ensured that system work and to
Machine is least in power-consuming.
Referring to Fig. 6, resonance signal regulating device further includes display module 15 in one of the embodiments,.
Display module 15 is connect with control module 13, for showing signal to charging shape according to charging display signal and mode
State and working condition are shown.In specific implementation, carried out except charging instruction and working status indication by display module 15,
Police instruction can also be carried out to low battery state.
The embodiment of the present invention shows charged state by display module, shows to different working conditions,
In order to which user gets information about the state of device and time writer, user is reminded to charge time writer in time.
Referring to Fig. 7, frequency detection module 12 includes first comparator U9-A, the first electricity in one of the embodiments,
Hinder R1, second resistance R2 and the first up counter U2.
The noninverting input of first comparator U9-A and the reverse input end of first comparator U9-A collectively form as frequency
The resonance signal input terminal of detection module 12.The output end of first comparator U9-A is that the pen that enters of frequency detection module 12 wakes up letter
Number output end.
The reset terminal RST of first up counter U2 is the reset signal input terminal of frequency detection module 12.
The clock end of the output end of first comparator U9-A and the first end of first resistor R1 and the first up counter U2
CLK connection, the second end of first resistor R1 are connect with the first power supply.
The the first enable end P and the first addition for setting several end LD, the first up counter U2 of first up counter U2
The second enable end T of counter U2 is connect with the first power supply, the 4th output end Q3 and second resistance of the first up counter U2
The first end of R2 connects, and the second end of second resistance R2 is the frequency count signal output end of frequency detection module 12.
In specific implementation, optionally, the first power supply is 3V power supply.The first output end Q0 of first up counter U2,
The third output end Q2 of the second output terminal Q1 of one up counter U2 and the first up counter U2 can be vacant, can also be with
3rd resistor R3, the 4th resistance R4 and the 5th resistance R5 are concatenated respectively and then are connect with power ground GND.
Referring to Fig. 7, in one of the embodiments, tuner module 11 include the first analog switch U1, the second capacitor C2,
Third capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7, the 8th capacitor C8, the 9th capacitor C9,
Tenth capacitor C10, the 11st capacitor C11, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the tenth resistance R10, the first electricity
Feel L1 and the first triode Q1.
The first end of second capacitor C2 is connect with resonant power, and the second end of the second capacitor C2 is connect with power ground GND.
The first end of 7th resistance R7, the first end of the first inductance L1, the first end of third capacitor C3, the first analog switch
The second common end COM2 of the first common end COM1 and the first analog switch U1 of U1 are connect with resonant power, the 7th resistance R7
Second end connect with the base stage of the first end and the first triode Q1 of the first end of the 9th capacitor C9 and the 8th resistance R8,
The of the second end of nine capacitor C9 and the second end of the 8th resistance R8, the second end of the tenth resistance R10 and the 11st capacitor C11
Two ends are connect with power ground GND, and the emitter of the first triode Q1 is connect with the first end of the 9th resistance R9, the 9th resistance R9's
Second end is connect with the first end of the first end of the tenth resistance R10 and the 11st capacitor C11, the second end of the first inductance L1 and the
The second end of three capacitor C3 is connected with the collector of the first triode Q1, and the second of the 4th capacitor C4 calculates the with third capacitor C3
Two ends are connected with the first end of the tenth capacitor C10, and the second end of the tenth capacitor C10 is connect with the first end of the 11st capacitor C11.
The second digital control end IN2 of the first of first analog switch U1 digital control end IN1 and the first analog switch U1
Collectively form the frequency adjusting signals input terminal for tuner module 11.
The power end of first analog switch U1 is connect with second source, the first normal-closed end NC1 of the first analog switch U1 with
The first end of 5th capacitor C5 connects, and the first normally open end NO1 of the first analog switch U1 is connect with the first end of the 6th capacitor C6,
The second normally open end NO2 of first analog switch U1 is connect with the first end of the 7th capacitor C7, and the second of the first analog switch U1 is often
Closed end NC2 is connect with the first end of the 8th capacitor C8, the second end of the 5th capacitor C5, the second end of the 6th capacitor C6, the 7th electricity
The second end of the second end and the 8th capacitor C8 of holding C7 is connect with the second end of the 4th capacitor C4.
The the first common end COM1's and the first analog switch of the second end of 8th capacitor C8 and the first analog switch U1
The resonance signal output end that second common end COM2 collectively forms as tuner module 11.
In specific implementation, optionally, resonant power is 5V power supply, and second source is 3V power supply.
Referring to Fig. 7, in one of the embodiments, control module 13 include microprocessor U3, the 6th resistance R6 and
First capacitor C1.
Microprocessor U3 reset terminal NRST is connect with the first end of the first end of the 6th resistance R6 and first capacitor C1, and first
The second end of capacitor C1 is connect with power ground GND, and the second end of the 6th resistance R6 is connect with third power supply.
The analog power end VDDA of microprocessor U3 is connect with third power supply, the power end VDD and third of microprocessor U3
Power supply connection, the ground terminal VSS of microprocessor U3 are connect with power ground GND.
The first data input/output terminal PA7 of microprocessor U3 is the key wakeup signal input part of control module 13.
The second data input/output terminal PA10 of microprocessor U3 is the reset signal output end of control module 13.
The third data input/output terminal PA6 of microprocessor U3 is the power supply enable signal of the first level of control module 13
The power supply enable signal output end of output end and the second electrical level of control module 13.
The 4th data input/output terminal PA13 of microprocessor U3 and the 5th data input/output terminal of microprocessor U3
The frequency adjusting signals output end that PA14 collectively forms as control module 13.
The 6th data input/output terminal PA4 of microprocessor U3 is that the charging of control module 13 shows signal output end and control
The mode of molding block 13 shows signal output end.
The 7th data input/output terminal PA9 of microprocessor U3 is the frequency count signal input terminal of control module 13.
The 8th data input/output terminal PA2 of microprocessor U3 is that the charging of control module 13 detects signal input part.
The 9th data input/output terminal PA15 of microprocessor U3 enters a wake-up signal input terminal for control module 13.
In specific implementation, optionally, third power supply is 3V, and display module 15 includes light emitting diode, passes through light-emitting diodes
Pipe shows charged state and operational mode state.Second source conversion module 102 includes LDO (low dropout
Regulator, low pressure difference linear voltage regulator) chip, the first power conversion module 101 includes synchronous rectification chip, be can be realized
Quiescent current reaches uA grades, 93% or more resonant operational voltage conversion efficiency.
Below with reference to Fig. 7, a kind of working principle of resonance signal regulating device is further detailed:
First inductance L1 is in parallel with third capacitor C3 and the 4th capacitor C4 with capacitor, the with the first analog switch U1 control
Four capacitor C5, the 4th capacitor C6, the 4th capacitor C7 and the 4th capacitor C8 are in parallel, and with the first key switch SW1 and second
12nd capacitor C12 of key switch SW2 control and the 13rd capacitor C13 are in parallel, constitute the shunt-resonant circuit LC.LC parallel connection is humorous
Vibration circuit frequency of oscillation beWherein, L is the inductance of the first inductance, and C is in parallel with the first inductance L1
The capacitance of capacitor.
When detecting that device enters within the scope of the aerial radiation of electromagnetic screen or electromagnetic handwritten screen, pass through LC parallel resonance
Circuit generates the resonance signal that frequency is located at the 4th pre-set interval, which is located at the resonance signal of the 4th pre-set interval through first
It generates after comparator U9-A into a wake-up signal (WKUP1) and the 9th data input/output terminal PA15 through microprocessor U3 is passed
It is defeated by microprocessor U3, microprocessor U3 generates the power supply enable signal of high level according to a wake-up signal (WKUP1) is entered
(DCDC_EN), the dc-dc conversion chip U4 of the first power conversion module 101 of control is converted to battery supply VBAT humorous
Vibration power supply (5V) enters resonance to the shunt-resonant circuit LC and the first analog switch U1 power supply and tunes working condition.
For time writer when writing, pen tip, which is pressurized, generates displacement, since magnetic core is connected with pen tip, so magnetic core is with respect to coil position
It moves, the inductance of the first inductance L1 is caused to change, the resonance frequency known to the calculation formula of resonance frequency f changes,
The frequency information of this variation is Z axis pressure sensitivity information, and the resonance signal that tuner module 11 generates at this time is sent out via the first inductance L1
It is shot out, while carrying out frequency detecting by first comparator U9-A and the first up counter U2 and counting to generate frequency counting
Signal, and the frequency is calculated into signal, microprocessor U3 is transferred to by the 7th data input/output terminal PA9 of microprocessor U3；
Microprocessor U3 calculates signal according to the frequency and generates first frequency adjustment signal and second frequency adjustment signal and by micro- place
The 5th data input/output terminal PA14 output for managing the 4th data input/output terminal PA13 and microprocessor U3 of device U3, through first
The second digital control end IN2 of the first of analog switch U1 digital control end IN1 and the first analog switch U1 are transferred to the first mould
Quasi- switch U1；First analog switch U1 is according to first frequency adjustment signal and second frequency adjustment signal selection connection and the first electricity
The capacitor of L1 parallel connection is felt, so that the resonance frequency of the shunt-resonant circuit LC is adjusted in real time, so that the resonance of the shunt-resonant circuit LC
Frequency is automatically adjusted in a stable range close to the predeterminated frequency of electromagnetic screen or electromagnetic handwritten screen, realizes resonance frequency
The automatic adjustment of rate has adjusted active Electromagnetic tranmitting frequency, avoids component parameters deviation and environmental factor will affect electromagnetism
The tranmitting frequency of pen, the defect that the writing position coordinate precision so as to cause time writer is low and pen pressure detection error is big, improves
The resolution ratio that time writer pressure sensitivity precision and time writer are write, time writer writing coordinate setting is accurate, writes non-delay hangover, person's handwriting
For reduction degree close to true person's handwriting, the reliability user experience for improving time writer writing is splendid.Meanwhile also solving time writer
Manufal tuning frequency is difficult in production process, the problem of resonance frequency consistency difference.
It is detecting that device enters within the scope of the aerial radiation of electromagnetic screen or electromagnetic handwritten screen, is being more than preset time, example
If preset time is 30 minutes, when the shunt-resonant circuit LC does not generate resonance signal of the frequency in the first preset range, by micro-
Processor U3 generates low level power supply enable signal (DCDC_EN), disconnects power supply (the i.e. resonance of the shunt-resonant circuit LC
Power supply), with energy saving.
It presses the first shunt-resonant circuit key switch SW1, LC and is incorporated to the 12nd capacitor C12, press the second key switch
The shunt-resonant circuit SW2, LC is incorporated to the 13rd capacitor C13, generates the wireless transmission letter that frequency is located at the second pre-set interval respectively
Number and frequency be located at the wireless transmission signal of third pre-set interval, while also generation key wakeup signal (WKUP3), frequency is located at
The wireless transmission signal that the wireless transmission signal and frequency of second pre-set interval are located at third pre-set interval passes through the first inductance L1
To electromagnetic screen, perhaps electromagnetic handwritten screen by electromagnetic screen or electromagnetic handwritten screen receives and parses through wireless transmission signal to wireless transmission,
It realizes and relevant feature operation is carried out by the first key switch SW1 and the second key switch SW2；Microprocessor U3 by its
One data input/output terminal PA7 receives key wakeup signal (WKUP3) and generates high level according to key wakeup signal (WKUP3)
Power supply enable signal (DCDC_EN), control the first power conversion module 101 dc-dc conversion chip U4 by battery electricity
Source (VBAT) is converted to resonant power to the shunt-resonant circuit LC and the first analog switch U1 power supply to enter resonance and tuning work
Make state.
The second aspect of the embodiment of the present invention provides a kind of time writer, and time writer includes resonance signal as described above
Regulating device.
The time writer of the present embodiment can be realized resonance frequency self feed back adjusting, so that tuner module generates frequency and is located at the
The resonance signal of one pre-set interval realizes the automatic adjustment of resonance frequency, has adjusted active Electromagnetic tranmitting frequency, avoids
Component parameters and environmental factor will affect the tranmitting frequency of time writer, so as to cause time writer writing position coordinate precision it is low and
The big defect of pen pressure detection error, improves the resolution ratio of time writer pressure sensitivity precision and time writer writing, and time writer writes coordinate
Registration writes non-delay hangover, and for person's handwriting reduction degree close to true person's handwriting, user experience is splendid, improves time writer book
The reliability write.Meanwhile also solving manufal tuning frequency difficulty in time writer production process, resonance frequency consistency difference is asked
Topic.
The third aspect of the embodiment of the present invention provides a kind of electromagnetic handwritten screen system, including with transmit coil and reception
The electromagnetic handwritten screen of coil, electromagnetic handwritten screen system further include time writer as described above.
Although describing certain embodiments above with some the level of detail, those of skill in the art can be to institute
Disclosed embodiment makes many changes without departing from the scope of the present disclosure.In addition, the specific name of each functional unit, module
Also it is only for convenience of distinguishing each other, the protection scope being not intended to limit this application.Unit in above system, module it is specific
The course of work can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In the above-described embodiments, it all emphasizes particularly on different fields to the description of each embodiment, is not described in detail or remembers in some embodiment
The part of load may refer to the associated description of other embodiments.In addition, each functional unit in each embodiment of the present invention can
To be integrated in a processing unit, it is also possible to each unit and physically exists alone, it can also be with two or more units
It is integrated in one unit.Above-mentioned integrated unit both can take the form of hardware realization, can also use software function list
The form of member is realized.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (10)
1. a kind of resonance signal regulating device, which is characterized in that the resonance signal regulating device includes:
For generating the tuner module of wireless transmission signal and resonance signal according to frequency adjusting signals；
It is connect with the tuner module, the frequency for generating frequency count signal according to the resonance signal and reset signal is examined
Survey module；
It is connect with the tuner module and the frequency detection module, for generating the clearing according to the frequency count signal
Signal and the frequency adjusting signals, so that the resonance signal that the tuner module is generated according to the frequency adjusting signals
Frequency be located at the control module of the first pre-set interval.
2. resonance signal regulating device as described in claim 1, which is characterized in that the resonance signal regulating device is also wrapped
It includes:
It connect with the tuner module and the control module, is pressed for inputting generation the first push button signalling and second according to user
The key module of key signals；
The tuner module, which is also used to generate frequency according to the frequency adjusting signals and first push button signalling, is located at second
The wireless transmission signal of pre-set interval, and frequency is generated according to the frequency adjusting signals and second push button signalling and is located at the
The wireless transmission signal of three pre-set intervals.
3. resonance signal regulating device as claimed in claim 2, which is characterized in that the tuner module is also used to generate frequency
Positioned at the resonance signal of the 4th pre-set interval；
The resonance signal regulating device further include:
It is connect with the tuner module, for generating resonant power according to the power supply enable signal and battery supply of the first level
First power conversion module；
The tuner module is specifically used for generating the wireless transmission letter according to the resonant power and the frequency adjusting signals
Number and the resonance signal；The frequency detection module is also used to be generated according to the resonance signal into a wake-up signal；
The control module is also used to generate key wakeup letter according to first push button signalling or second push button signalling
Number, and according to it is described enter a wake-up signal or the key wakeup signal generate the power supply enable signal of first level.
4. resonance signal regulating device as described in claim 1, which is characterized in that the resonance signal regulating device is also wrapped
It includes:
It is connect with the control module, for generating the charging protecting module for filling power detection signal according to charge power supply；
The control module is also used to fill the power supply enable signal that power detection signal generates second electrical level according to；
First power conversion module stops generating the resonant power according to the power supply enable signal of the second electrical level.
5. resonance signal regulating device as described in claim 1, which is characterized in that the resonance signal regulating device is also wrapped
It includes:
For generating the second source conversion module that power supply is the power supply of each functional module according to the battery supply.
6. resonance signal regulating device as described in claim 1, which is characterized in that the frequency detection module includes the first ratio
Compared with device, first resistor, second resistance and the first up counter；
The reverse input end of the noninverting input of the first comparator and the first comparator collectively forms as the frequency
The resonance signal input terminal of detection module；The output end of the first comparator is that the pen that enters of the frequency detection module wakes up letter
Number output end；
The reset terminal of first up counter is the reset signal input terminal of the frequency detection module；
The output end of the first comparator and the first end of the first resistor and the clock end of first up counter
Connection, the second end of the first resistor are connect with the first power supply；
First up counter sets several ends, the first enable end of first up counter and first addition
Second enable end of counter is connect with first power supply, the 4th output end and described second of first up counter
The first end of resistance connects, and the second end of the second resistance is the frequency count signal output end of the frequency detection module.
7. resonance signal regulating device as described in claim 1, which is characterized in that the tuner module includes that the first simulation is opened
Pass, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor, the 8th capacitor, the 9th capacitor,
Ten capacitors, the 11st capacitor, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the first inductance and the first triode；
The first end of second capacitor is connect with resonant power, and the second end of second capacitor is connect with power ground；
First end, the first end of first inductance, the first end of the third capacitor, first mould of 7th resistance
First common end of quasi- switch and the second common end of first analog switch are connect with the resonant power, and the described 7th
The first end of the second end of resistance and the 9th capacitor and the first end of the 8th resistance and first triode
The second end of base stage connection, the second end of the 9th capacitor and the 8th resistance, the second end of the tenth resistance and
The second end of 11st capacitor is connect with power ground, and the first of the emitter of first triode and the 9th resistance
End connection, the second end of the 9th resistance and the first end of the tenth resistance and the first end of the 11st capacitor connect
It connects, the second end of first inductance is connect with the collector of the second end of the third capacitor and first triode, institute
The second calculation for stating the 4th capacitor is connect with the first end of the second end of the third capacitor and the tenth capacitor, the tenth electricity
The second end of appearance is connect with the first end of the 11st capacitor；
First digital control end of first analog switch and the second digital control common structure in end of first analog switch
Frequency adjusting signals input terminal as the tuner module；
The power end of first analog switch is connect with second source, the first normal-closed end of first analog switch with it is described
The first end of 5th capacitor connects, and the first normally open end of first analog switch is connect with the first end of the 6th capacitor,
Second normally open end of first analog switch is connect with the first end of the 7th capacitor, and the second of first analog switch
Normal-closed end is connect with the first end of the 8th capacitor, second end, the second end of the 6th capacitor, institute of the 5th capacitor
The second end of the second end and the 8th capacitor of stating the 7th capacitor is connect with the second end of the 4th capacitor；
The second end of 8th capacitor and the first common end of first analog switch and first analog switch
The resonance signal output end that second common end collectively forms as the tuner module.
8. resonance signal regulating device as described in claim 1, which is characterized in that the control module include microprocessor,
6th resistance and first capacitor；
The microprocessor reset end is connect with the first end of the first end of the 6th resistance and the first capacitor, and described
The second end of one capacitor is connect with power ground, and the second end of the 6th resistance is connect with third power supply；
The analog power end of the microprocessor is connect with the third power supply, the power end of the microprocessor and the third
Power supply connection, the ground terminal of the microprocessor are connect with power ground；
First data input/output terminal of the microprocessor is the key wakeup signal input part of the control module；
Second data input/output terminal of the microprocessor is the reset signal output end of the control module；
The third data input/output terminal of the microprocessor is that the power supply enable signal of the first level of the control module is defeated
The power supply enable signal output end of the second electrical level of outlet and the control module；The 4th data input of the microprocessor is defeated
5th data input/output terminal of outlet and the microprocessor collectively form for the frequency adjusting signals of the control module it is defeated
Outlet；
6th data input/output terminal of the microprocessor is that the charging of the control module shows signal output end and described
The mode of control module shows signal output end；
7th data input/output terminal of the microprocessor is the frequency count signal input terminal of the control module；
8th data input/output terminal of the microprocessor is that the charging of the control module detects signal input part；
9th data input/output terminal of the microprocessor enters a wake-up signal input terminal for the control module.
9. a kind of time writer, which is characterized in that the time writer includes resonance signal as claimed in any one of claims 1 to 8
Regulating device.
10. a kind of electromagnetic handwritten screen system, including the electromagnetic handwritten screen with transmit coil and receiving coil, which is characterized in that
The electromagnetic handwritten screen system further includes time writer as claimed in claim 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021135885A1 (en) * | 2020-01-03 | 2021-07-08 | 华为技术有限公司 | Signal transmission method for use in triggering handwriting display, and handwriting display method |
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