CN102799335A - Digitizer with phase lock loop - Google Patents
Digitizer with phase lock loop Download PDFInfo
- Publication number
- CN102799335A CN102799335A CN2011101382739A CN201110138273A CN102799335A CN 102799335 A CN102799335 A CN 102799335A CN 2011101382739 A CN2011101382739 A CN 2011101382739A CN 201110138273 A CN201110138273 A CN 201110138273A CN 102799335 A CN102799335 A CN 102799335A
- Authority
- CN
- China
- Prior art keywords
- electromagnetic wave
- digiboard
- circuit
- frequency
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Pinball Game Machines (AREA)
Abstract
The invention relates to a digitizer with a phase lock loop. The digitizer with the phase lock loop comprises a transmitting circuit, an application circuit, a sensor board and a receiving circuit, wherein the transmitting circuit is used for generating an electromagnetic wave signal; the application circuit is used for controlling the transmitting circuit to generate the electromagnetic wave signal; the sensor board receives electromagnetic wave energy and emits the electromagnetic wave energy for an electromagnetic pen to receive; and the receiving circuit is used for receiving a resonance signal which is formed by the resonation of the electromagnetic pen, and transmitting the resonance signal to the application circuit. The phase lock loop is used for adjusting frequency so as to control the transmitting circuit to transmit the electromagnetic wave signal with new frequency.
Description
Technical field
The invention relates to a kind of digiboard (Digitizer),, let time writer can receive ceiling capacity particularly about a kind of digiboard with phase lock circuitry.
Background technology
In present electromagnetic type digiboard (Digitizer) technology, be main mainly with passive electromagnetic formula touch technology.Figure 1A shows the synoptic diagram of traditional passive electromagnetic formula digiboard 10.Shown in Figure 1A, the application circuit 102 control transtation mission circuits 104 of traditional digiboard 10 transmit an electromagnetic wave and give induction antenna plate 106.Induction antenna plate (sensorboard) 106 can be launched a fixed frequency, and (for example: 375Khz) give time writer 108, this frequency is called fundamental frequency, and the oscillatory circuit on the time writer 108 can design the oscillation point identical with fundamental frequency.When sensor circuit plate 106 sent out electromagnetic wave to time writer 108 inductions, the oscillating circuit on the time writer 108 produced resonance, and can receive the strongest electromagnetic wave energy this moment.
Oscillatory circuit on the time writer 108 is the LC oscillatory circuit, and the time writer 108 generation pressure gradient when accomplishing to press down, and can change L when time writer 108 presses down or change C to change Frequency point.When induction antenna plate 106 is received the frequency that is different from fundamental frequency, can carry out the processing of pressure and produce the gradient of pressure.
After time writer 108 pressed down, the resonant frequency point of time writer 108 can linear change, and caused LC oscillatory circuit on the time writer 108 to the resonance point skew of fundamental frequency.When induction antenna plate 106 was still launched fundamental frequency, the energy that time writer 108 is received was not maximum, had the part electromagnetic wave to lose, shown in Figure 1B.So when time writer 108 pressed down, the energy that resonance produces was not strong, the energy that feeds back to induction antenna plate 106 also just more a little less than, cause the instability after time writer 108 presses down easily, and then cause the mistake of touch-control identification.Therefore; If the energy frequency that the induction antenna plate sends can be followed the change of frequency of time writer, when the concussion frequency shift (FS) of time writer, the induction antenna plate sends the resonant frequency point of relativity shift; After time writer presses down; In any case the oscillation point skew, the induction antenna plate can send corresponding resonant frequency, and this moment, time writer all can be received ceiling capacity.
This shows that above-mentioned existing digiboard obviously still has inconvenience and defective, and demands urgently further improving in structure and use.Therefore how to found a kind of digiboard of tool phase lock circuitry of new structure, also becoming the current industry utmost point needs improved target.
Summary of the invention
The objective of the invention is to; Overcome the defective that existing digiboard exists, and a kind of digiboard of tool phase lock circuitry of new structure is provided, technical matters to be solved is to make its digiboard have a phase lock circuitry; Utilize this phase lock circuitry to control the frequency of an electromagnetic wave signal, be very suitable for practicality.
Another object of the present invention is to; A kind of digiboard of tool phase lock circuitry of new structure is provided; Technical matters to be solved is that digiboard can be adjusted electromagnetic wave signal with the reduction error, thereby is suitable for practicality more after making the resonance signal generation drift of its may command digiboard.
The object of the invention and solve its technical matters and adopt following technical scheme to realize.The digiboard of a kind of tool phase lock circuitry that proposes according to the present invention wherein comprises a transtation mission circuit, is used to produce an electromagnetic wave signal; One application circuit is used to control this transtation mission circuit and produces this electromagnetic wave signal; One antenna induction plate is used to receive this electromagnetic wave energy, and this electromagnetic wave energy is launched, and lets a time writer receive; And a receiving circuit, be used to receive the resonance signal that this time writer resonates out, and this resonance signal is transferred to this application circuit; Wherein this phase lock circuitry is used to adjust frequency, and then controls this transtation mission circuit and transmit this electromagnetic wave signal with new frequency.
The object of the invention and solve its technical matters and also can adopt following technical measures further to realize.
Aforesaid digiboard, wherein said above-mentioned this application circuit be the frequency of this electromagnetic wave signal and this resonance signal relatively.
Aforesaid digiboard, wherein said if the frequency of this electromagnetic wave signal is different from this resonance signal, the frequency of this this electromagnetic wave signal of phase lock circuitry adjustment lets this transmission signal transmit this electromagnetic wave signal of new frequency.
Aforesaid digiboard, the wherein said above-mentioned time writer that lets can receive the energy of this strongest electromagnetic wave signal always, and then reduces the error of identification.
Aforesaid digiboard, wherein said above-mentioned digiboard are an electromagnetic type digiboard.
Aforesaid digiboard, wherein said above-mentioned digiboard are a passive electromagnetic formula digiboard.
The object of the invention and solve its technical matters and also adopt following technical scheme to realize.The digiboard of a kind of tool phase lock circuitry that proposes according to the present invention wherein comprises a transtation mission circuit, is used to produce an electromagnetic wave signal; One application circuit electrically connects this transtation mission circuit, and is used to control this this electromagnetic wave signal of transtation mission circuit generation; One antenna induction plate electrically connects this transtation mission circuit receiving this electromagnetic wave energy, and this electromagnetic wave energy is launched, and lets a time writer receive; And a receiving circuit, electrically connect this antenna induction plate and this application circuit, be used to receive the resonance signal that this time writer resonates out, and this resonance signal is transferred to this application circuit; This application circuit frequency of this electromagnetic wave signal and this resonance signal relatively wherein, if the frequency of this electromagnetic wave signal is different from this resonance signal, the frequency of this this electromagnetic wave signal of phase lock circuitry adjustment lets this transtation mission circuit transmit this electromagnetic wave signal of new frequency.
The object of the invention and solve its technical matters and also can adopt following technical measures further to realize.
Aforesaid digiboard, wherein said above-mentioned digiboard are an electromagnetic type digiboard.
Aforesaid digiboard, wherein said above-mentioned digiboard are a passive electromagnetic formula digiboard.
The present invention compared with prior art has tangible advantage and beneficial effect.Can be known that by above technical scheme major technique of the present invention thes contents are as follows: disclose a kind of digiboard (Digitizer) of tool phase lock circuitry, it comprises transtation mission circuit, application circuit, antenna induction plate and receiving circuit.Transtation mission circuit is used to produce an electromagnetic wave signal.Application circuit is used to control the transtation mission circuit signal that generates electromagnetic waves.The antenna induction plate receives electromagnetic wave energy, and electromagnetic wave energy is launched, and lets a time writer receive.Receiving circuit is used to receive the resonance signal that time writer resonates out, and this resonance signal is transferred to this application circuit.Wherein phase lock circuitry is used to adjust frequency, and then the control transtation mission circuit transmits the electromagnetic wave signal with new frequency.Disclose the digiboard (Diitizer) of another kind of tool phase lock circuitry again, it comprises transtation mission circuit, application circuit, antenna induction plate and receiving circuit.Transtation mission circuit is used to produce an electromagnetic wave signal.Application circuit electrically connects transtation mission circuit, and is used to control the transtation mission circuit signal that generates electromagnetic waves; The antenna induction plate electrically connects transtation mission circuit with the reception electromagnetic wave energy, and lets a time writer receive the electromagnetic wave energy emission.Receiving circuit electrically connects antenna induction plate and application circuit, and it is used to receive the resonance signal that time writer resonates out, and resonance signal is transferred to application circuit.Wherein application circuit compares the frequency of electromagnetic wave signal and resonance signal, if the frequency of electromagnetic wave signal is different from resonance signal, the frequency of phase lock circuitry adjustment electromagnetic wave signal lets transtation mission circuit transmit the electromagnetic wave signal of new frequency.By technique scheme, the digiboard of tool phase lock circuitry of the present invention has advantage and beneficial effect at least: digiboard has a phase lock circuitry, utilizes this phase lock circuitry to control the frequency of an electromagnetic wave signal.After the resonance signal of may command digiboard produced drift, digiboard can be adjusted electromagnetic wave signal to reduce error.As long as time writer produces skew; Application circuit will be caught up with the signal that a reception returns with the signal of receive and compared; If produce signal bias, application circuit is then adjusted frequency according to signal bias amount control lock circuitry phase, and then the control transtation mission circuit transmits the electromagnetic wave energy of new frequency.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention; Understand technological means of the present invention in order can more to know; And can implement according to the content of instructions, and for let above and other objects of the present invention, feature and advantage can be more obviously understandable, below special act preferred embodiment; And conjunction with figs., specify as follows.
Description of drawings
Figure 1A is the synoptic diagram of traditional digiboard;
Figure 1B is the signal schematic representation of traditional digiboard;
Fig. 2 A is the synoptic diagram of tool exhibition frequency circuit digiboard of the present invention; And
Fig. 2 B is the signal schematic representation of digiboard of the present invention.
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to the digiboard of the tool phase lock circuitry that proposes according to the present invention
Its embodiment, structure, characteristic and effect thereof, specify as after.
Fig. 2 shows the synoptic diagram of tool exhibition frequency circuit digiboard of the present invention.As shown in Figure 2, mainly comprise application circuit 22, transtation mission circuit 204 at the digiboard 20 of this embodiment, induction antenna plate (sensor board) 206, time writer 208, (Phase Lock Loop, PLL) circuit 212 mutually with lock for receiving circuit 210.Transtation mission circuit 204 electrically connects with application circuit 202 and induction antenna plate 206 respectively; The application circuit 202 of digiboard 20 is used for the touch-control coordinate and the pressure of time writer are calculated, and 204 pairs of induction antenna plates 206 of control application circuit 202 control transtation mission circuits are done transmission or stopped to send the electromagnetic wave (claiming fundamental frequency signal again) of fixed frequency.At this moment, induction antenna plate 206 can (for example: electromagnetic wave signal 375KHz) sends to time writer 208, and the LC resonant circuit on the time writer 208 (not icon) can produce resonance with the fixed frequency that is received.When time writer 208 presses down, (make the action of writing) and can change L or change C and change Frequency point, receiving circuit 210 can transmit signals to application circuit 202 and carry out pressure treatment and produce pressure gradient when receiving the signal that is different from fundamental frequency.And phase lock circuitry 212 electrically connects with application circuit 202 and transtation mission circuit 204 respectively.
Yet; Still consult Fig. 2; Be different from traditional digiboard, application circuit 202 first control lock circuitry phases 212 of the present invention are set the frequency that will send energy, do the control of sending or stopping to send electromagnetic wave signal by 204 pairs of induction antenna plates 206 of application circuit 202 control transtation mission circuits again.After having sent electromagnetic wave energy, 210 pairs of antennas of application circuit 202 control receiving circuits are done reception and are stopped to receive the energy that time writer 208 feeds back.After receiving, application circuit 202 can go signal is processed, and then sees coordinate and force value (touch-control identification) off.Before doing the emission of next signal and receiving action, whether application circuit 202 of the present invention can be caught up with the signal that a reception returns and compares receiving the signal of returning, judge time writer and press down.If after the skew of the resonance point of time writer 208; Application circuit 202 can be adjusted frequency by control lock circuitry phase 212; Make frequency can follow resonance point on the time writer 208 adjust transtation mission circuit 204 can be sent be different from before the electromagnetic wave of fundamental frequency (like 375Khz) give time writer 208; Let time writer 208 can receive the strongest energy always, and then reduce the error of identification.
Fig. 2 B shows the signal schematic representation of digiboard of the present invention.Shown in Fig. 2 B, for instance, when fundamental frequency during at 375KHz, the resonant frequency of time writer 208 is also at 375KHz.When time writer 208 pressed down, resonant frequency shift was to 385KHz, and application circuit 202 control lock circuitry phases 206 convert 204 fundamental frequencies that will launch of transtation mission circuit to 385KHz.So time writer 208 can not cause the fundamental frequency signal of reception to produce error because of the skew of resonant frequency, and then causes the mistake of touch-control identification.Yet, need to prove that at this above-mentioned frequency values 375KHz and 385KHz only are interpreting electromagnetic pen 208 offset problems, and the energy frequency that can launch of unrestricted digiboard of the present invention 20 only limits to 375KHz and 385KHz.As long as time writer 208 produces skew; Application circuit 202 will be caught up with the signal that a reception returns with the signal of receive and compared; If produce signal bias; 202 of application circuits are adjusted frequency according to signal bias amount control lock circuitry phase 212, and then control transtation mission circuit 204 transmits the electromagnetic wave energy of new frequency.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction; Though the present invention discloses as above with preferred embodiment; Yet be not in order to limiting the present invention, anyly be familiar with the professional and technical personnel, in not breaking away from technical scheme scope of the present invention; When the technology contents of above-mentioned announcement capable of using is made a little change or is modified to the equivalent embodiment of equivalent variations; In every case be the content that does not break away from technical scheme of the present invention, to any simple modification, equivalent variations and modification that above embodiment did, all still belong in the scope of technical scheme of the present invention according to technical spirit of the present invention.
Claims (9)
1. the digiboard of a tool phase lock circuitry is characterized in that it comprises
One transtation mission circuit is used to produce an electromagnetic wave signal;
One application circuit is used to control this transtation mission circuit and produces this electromagnetic wave signal;
One antenna induction plate is used to receive this electromagnetic wave energy, and this electromagnetic wave energy is launched, and lets a time writer receive; And
One receiving circuit is used to receive the resonance signal that this time writer resonates out, and this resonance signal is transferred to this application circuit;
Wherein this phase lock circuitry is used to adjust frequency, and then controls this transtation mission circuit and transmit this electromagnetic wave signal with new frequency.
2. digiboard as claimed in claim 1 is characterized in that the relatively frequency of this electromagnetic wave signal and this resonance signal of this above-mentioned application circuit.
3. digiboard as claimed in claim 2 is characterized in that if the frequency of this electromagnetic wave signal is different from this resonance signal the frequency of this this electromagnetic wave signal of phase lock circuitry adjustment lets this transmission signal transmit this electromagnetic wave signal of new frequency.
4. digiboard as claimed in claim 3 is characterized in that the above-mentioned time writer that lets can receive the energy of this strongest electromagnetic wave signal always, and then reduces the error of identification.
5. digiboard as claimed in claim 1 is characterized in that above-mentioned digiboard is an electromagnetic type digiboard.
6. digiboard as claimed in claim 1 is characterized in that above-mentioned digiboard is a passive electromagnetic formula digiboard.
7. the digiboard of a tool phase lock circuitry is characterized in that it comprises
One transtation mission circuit is used to produce an electromagnetic wave signal;
One application circuit electrically connects this transtation mission circuit, and is used to control this this electromagnetic wave signal of transtation mission circuit generation;
One antenna induction plate electrically connects this transtation mission circuit receiving this electromagnetic wave energy, and this electromagnetic wave energy is launched, and lets a time writer receive; And
One receiving circuit electrically connects this antenna induction plate and this application circuit, is used to receive the resonance signal that this time writer resonates out, and this resonance signal is transferred to this application circuit;
This application circuit frequency of this electromagnetic wave signal and this resonance signal relatively wherein, if the frequency of this electromagnetic wave signal is different from this resonance signal, the frequency of this this electromagnetic wave signal of phase lock circuitry adjustment lets this transtation mission circuit transmit this electromagnetic wave signal of new frequency.
8. digiboard as claimed in claim 7 is characterized in that above-mentioned digiboard is an electromagnetic type digiboard.
9. digiboard as claimed in claim 7 is characterized in that above-mentioned digiboard is a passive electromagnetic formula digiboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101382739A CN102799335A (en) | 2011-05-23 | 2011-05-23 | Digitizer with phase lock loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101382739A CN102799335A (en) | 2011-05-23 | 2011-05-23 | Digitizer with phase lock loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102799335A true CN102799335A (en) | 2012-11-28 |
Family
ID=47198453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101382739A Pending CN102799335A (en) | 2011-05-23 | 2011-05-23 | Digitizer with phase lock loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102799335A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104636010A (en) * | 2013-11-08 | 2015-05-20 | 禾瑞亚科技股份有限公司 | Transmitter and transmitting method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004021328A2 (en) * | 2002-08-29 | 2004-03-11 | N-Trig Ltd. | Transparent digitiser |
| CN101539816A (en) * | 2009-04-16 | 2009-09-23 | 台均科技（深圳）有限公司 | Electromagnetic pen, electromagnetic signal transmitting method, processing method, device and equipment |
| CN201365144Y (en) * | 2009-03-02 | 2009-12-16 | 李植扬 | Inductive power supplying device |
| CN101901046A (en) * | 2009-05-25 | 2010-12-01 | 太瀚科技股份有限公司 | Input device with adjustment structure and wireless pen thereof |
| CN101957706A (en) * | 2010-09-30 | 2011-01-26 | 汉王科技股份有限公司 | Electromagnetic handwritten device |
-
2011
- 2011-05-23 CN CN2011101382739A patent/CN102799335A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004021328A2 (en) * | 2002-08-29 | 2004-03-11 | N-Trig Ltd. | Transparent digitiser |
| CN201365144Y (en) * | 2009-03-02 | 2009-12-16 | 李植扬 | Inductive power supplying device |
| CN101539816A (en) * | 2009-04-16 | 2009-09-23 | 台均科技（深圳）有限公司 | Electromagnetic pen, electromagnetic signal transmitting method, processing method, device and equipment |
| CN101901046A (en) * | 2009-05-25 | 2010-12-01 | 太瀚科技股份有限公司 | Input device with adjustment structure and wireless pen thereof |
| CN101957706A (en) * | 2010-09-30 | 2011-01-26 | 汉王科技股份有限公司 | Electromagnetic handwritten device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104636010A (en) * | 2013-11-08 | 2015-05-20 | 禾瑞亚科技股份有限公司 | Transmitter and transmitting method thereof |
| CN104636010B (en) * | 2013-11-08 | 2018-07-10 | 禾瑞亚科技股份有限公司 | transmitter and transmitting method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2014210248B2 (en) | Millimeter wave phased-array wave beam alignment method and communication device | |
| JP5640530B2 (en) | Wireless power supply system | |
| JP6702688B2 (en) | Wireless power transmission system and power receiving device | |
| TW201248486A (en) | Digitizer circuit with phase lock loop circuit | |
| US10334421B2 (en) | Near field communication device | |
| CN103428314A (en) | Method for adjusting radiation direction of mobile terminal, and mobile terminal | |
| CN101957706B (en) | Electromagnetic handwritten device | |
| CN110768392B (en) | Inductively coupled power transmission and full duplex signal hybrid transmission circuit and method | |
| JP2012005207A (en) | Power supply device and power supply system | |
| US10164766B1 (en) | Advanced synchronization schemes for NFC card emulation mode, peer-to-peer mode and RFID tag design | |
| US20150084829A1 (en) | Multiple antenna system for a wireless device | |
| MX2021013041A (en) | Control device having a secondary radio for waking up a primary radio. | |
| CN103647457B (en) | A kind of radio frequency solid state transformer | |
| CN102799335A (en) | Digitizer with phase lock loop | |
| KR101149680B1 (en) | Rfid(radio frequency identification) system capable of controlling a distance of recognition to a tag | |
| CN102681744A (en) | Digitizer with frequency spreading circuit | |
| JP2015136274A (en) | Non-contact power transmission device | |
| KR102193642B1 (en) | Hybrid wireless power transmission device which enables to transmit resonance power signal and induced power signal simultaneously and hybrid wireless power transmission system including the same | |
| EP3190661A1 (en) | Communication terminal | |
| JP2017229112A (en) | Power reception device, control method therefor and program | |
| TWI435259B (en) | Digitizer with spread spectrum circuit | |
| KR102483557B1 (en) | Near field communication device | |
| KR102150521B1 (en) | Wireless power transmission systme which enables to transmit and receive induced power signal and resonance power signal | |
| US20120299836A1 (en) | Digitizer with spread spectrum circuit | |
| CN105490704A (en) | Information processing method and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C05 | Deemed withdrawal (patent law before 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121128 |