CN104598052A - Wireless charging electromagnetic pen and system thereof - Google Patents
Wireless charging electromagnetic pen and system thereof Download PDFInfo
- Publication number
- CN104598052A CN104598052A CN201410492123.1A CN201410492123A CN104598052A CN 104598052 A CN104598052 A CN 104598052A CN 201410492123 A CN201410492123 A CN 201410492123A CN 104598052 A CN104598052 A CN 104598052A
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- time writer
- storage capacitor
- magnetic board
- radiating circuit
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Abstract
The invention discloses a wireless charging electromagnetic pen and a system of the wireless charging electromagnetic pen. The electromagnetic pen comprises a charging coil, a rectifying circuit, an energy storage capacitor and a transmitting circuit. The charging coil, the rectifying circuit, the energy storage capacitor and the transmitting circuit are connected sequentially and electrically. The charging coil receives an electromagnetic wave signal from an electromagnetic board and outputs an induction current. The rectifying circuit rectifies the induction current, and the rectified current is used for charging the energy storage capacitor. The electromagnetic pen transmits electromagnetic waves to the electromagnetic board through the transmitting circuit. A first inductor and a booster circuit are arranged between the energy storage capacitor and the transmitting circuit. The input end of the booster circuit is connected with the energy storage capacitor. The output end of the booster circuit is connected with the first inductor. The first inductor is used for isolating interference from the receiving frequency of the charging coil to the transmitting frequency of the transmitting circuit. The booster circuit is used for stabilizing the voltage of the transmitting circuit. The electromagnetic pen can well filter the frequency interference and conduct clearer and smoother operation on original handwriting.
Description
Technical field
The present invention relates to time writer field, particularly relate to a kind of wireless charging time writer and system thereof.
Background technology
In current time writer, some has battery, and some is then charged to time writer by electromagnetic screen.The former is limited by volume and weight, and it is not too convenient to use, but also needs to regularly replace battery, and find that the electricity of time writer is not enough when deployed just now, scene may not have corresponding reserve battery, thus affects the use of time writer; Although the latter does not need to use battery, in the process that electromagnetic screen is charged to time writer by emitting electromagnetic wave, time writer stops to electromagnetic screen emitting electromagnetic wave, and namely time writer cannot realize writing within this time period.The charging of such time writer or the writing process of time writer are subject to the restriction of the other side, and the use of the system of this electromagnetic screen and time writer is restricted in some cases.
Summary of the invention
The object of the invention is to propose a kind of wireless charging time writer and system thereof, thus, also can complete the charging to time writer at time writer electromagnetic screen in the process of writing, and there will not be possible written handwriting interrupted or the writing effect of true reflection user can not be reflected.
For this reason, the present invention proposes a kind of wireless charging time writer, comprise charge coil, rectification circuit, storage capacitor and radiating circuit, described charge coil, rectification circuit, storage capacitor and radiating circuit are electrically connected successively, described charge coil receives the electromagnetic wave signal from magnetic board and exports induction current, described rectification circuit carries out rectification to induction current, electric current after described rectification is used for charging to described storage capacitor, described time writer passes through described radiating circuit to magnetic board emitting electromagnetic wave, the first inductance and booster circuit is also comprised between described storage capacitor and described radiating circuit, the input end of described booster circuit is connected with described storage capacitor, the output terminal of described booster circuit is connected with described first inductance, described first inductance is for isolating the receive frequency of described charge coil to the interference of the transmission frequency of described radiating circuit, described booster circuit is for stablizing the voltage of described radiating circuit.
Preferably, the charge protector be connected with described storage capacitor is also comprised.
Preferably, described radiating circuit also comprises key circuit, and described key circuit comprises keyswitch and electric capacity, and described keyswitch is connected in parallel in the electric capacity two ends of described radiating circuit again after being connected with described capacitances in series, when described keyswitch is switched on, the capacitance of described radiating circuit changes.
Preferably, also comprise the first resistance, the second resistance, the first diode and the second diode, described storage capacitor is connected with the first inductance with the second diode by the first resistance, the anode of the second diode is by the second resistance eutral grounding, the negative electrode of the first diode is connected with the Enable Pin of booster circuit by the second inductance, and the first diode anode is connected with the first inductance by button.
The invention also discloses a kind of wireless charging time writer system, comprise the time writer described in aforementioned any one, also comprise magnetic board, described magnetic board is used for:
Judge whether the electric current of the transmitting coil in described magnetic board is less than predetermined threshold value, if be less than described predetermined threshold value, then:
Judge the electromagnetic wave signal whether described magnetic board receives described time writer and send, if receive described electromagnetic wave signal, then:
Described magnetic board terminates to described time writer emitting electromagnetic wave.
Wireless charging time writer disclosed by the invention and system thereof have good anti-frequency interferences ability, make its writing experience more smooth, realize more clear former person's handwriting operation smoothly, as the professional application such as drawing, engineering drawing can realize the effect just as real paper operates on the display screen, bring better experience sense to user.
In preferred version, magnetic board can stop charging to time writer automatically, user need not participate in, improves degree easy to use, and decrease the wasting of resources.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the specific embodiment of the invention one;
Fig. 2 is the electrical block diagram of the specific embodiment of the invention two.
Embodiment
Contrast accompanying drawing below in conjunction with embodiment the present invention is described in further detail.It is emphasized that following explanation is only exemplary, instead of in order to limit the scope of the invention and apply.
With reference to the following drawings, will describe the embodiment of non-limiting and nonexcludability, wherein identical Reference numeral represents identical parts, unless stated otherwise.
Embodiment one:
Referring to accompanying drawing 1, is the electrical block diagram of the specific embodiment of the invention one.A kind of wireless charging time writer disclosed by the invention comprises charge coil T, rectification circuit, storage capacitor and radiating circuit, and charge coil T, rectification circuit, storage capacitor and radiating circuit are electrically connected successively.The electromagnetic signal that charge coil T sends for receiving magnetic board, rectification circuit charges to storage capacitor after this signal being carried out the process such as rectification, filtering, and the electric energy that storage capacitor stores is for providing the power supply needed for time writer radiating circuit.
The radiating circuit transmission of electromagnetic signals of time writer is to magnetic board, magnetic board receives line correlation process of going forward side by side, such as, by the potential value of the X receiving coil and Y receiving coil that judge magnetic board, judge the position that time writer is write, the pattern of application program preset in magnetic board set by signal after treatment, can start its corresponding function.Mutually disturb for preventing frequency signal, the wave frequency that reception and transmission use is not identical or working time section is not identical, but in order to improve the convenience that time writer uses, usually time writer is not write and separate with duration of charging section, but just start charging work once meet charge condition in time writer writing process simultaneously, like this, just there will be time writer receive send to magnetic board from the charging signals of magnetic board and time writer write the situation that signal works in same time section.Again owing to being provided with backlight module in magnetic board, LED drive circuit meeting electromagnetic radiation-emitting during its work, thus cause stronger electromagnetic interference (EMI) to cause frequency shift (FS), likely cause the transmission frequency of magnetic board the same with the transmission frequency of time writer, the same frequency electric signal that charge coil T receives will be crosstalked into the radiating circuit of time writer by booster circuit, thus the frequency of operation of radiating circuit is had an impact, and the loss of the digital signal of the carrying causing radiating circuit to be launched, thus the person's handwriting causing magnetic board to present can not embody and operate the person's handwriting conformed to.Because, when the pressure of time writer to magnetic board is larger, this larger force value can be sent to magnetic board by radiating circuit by the processor of time writer, thus on magnetic board, show thicker person's handwriting, when otherwise the pressure of time writer to magnetic board is less, this less force value can be sent to magnetic board by radiating circuit by the processor of time writer, thus on magnetic board, show thinner person's handwriting.Therefore, if there is no the first inductance fiilter L1, magnetic board can be caused to occur false person's handwriting, even may occur interrupted.
In addition, due in use, the distance of the radiating circuit of time writer and magnetic board is not fixing, but changes within the specific limits, even if the power of the radiating circuit of magnetic board is certain, the induction electromotive force that charge coil T obtains there will be change.If do not have booster circuit, the electric power signal that time writer sends to magnetic board changes within the specific limits, likely causes magnetic board in reception and correctly can not identify corresponding function after processing signals, occurs the phenomenon of person's handwriting unstable even disconnection when such as writing.Therefore, the present invention is also provided with booster circuit between power supply unit and radiating circuit, for the electromagnetic signal that stable electrical magnetic pen is launched to magnetic board, guarantees that time writer all can not affect it and normally uses moving in magnetic board certain limit.
In one particular embodiment of the present invention, charge protection unit is also comprised.Charge protection unit comprises voltage detecting circuit and overvoltage crowbar.Obtain current charging input voltage by voltage detecting circuit, when the input voltage that charges is greater than charging voltage safety value, overvoltage crowbar just stops charging process; When the input voltage that charges is not more than charging voltage safety value, overvoltage crowbar just starts charging process, prevents charging voltage excessive, burns out the storage capacitor of time writer.
A kind of wireless type charged electrical magnetic pen that the present invention proposes is provided with inductance and booster circuit between storage capacitor and transtation mission circuit, time writer is made to have good noiseproof feature and higher write sensitivity, achieve the former person's handwriting input of more clear and smooth, user is provided the most real writing experience.
Embodiment two:
Referring to accompanying drawing 2, is the electrical block diagram of the specific embodiment of the invention two.In one particular embodiment of the present invention, radiating circuit also comprises key circuit, for time writer with the use of to realize specific function.Key circuit comprises keyswitch and electric capacity, and when keyswitch is switched on, the electric capacity in key circuit can participate in radiating circuit, and then the capacitance of radiating circuit is changed, and produces particular transmit frequency.Magnetic board presets the application program corresponding with this frequency, such as popup menu, is similar to right mouse button operation.Normal use time writer operates and namely realizes left mouse button effect on magnetic board, presses button on time writer always and can realize right mouse button effect.Certainly, the present invention is not limited to button and only realizes right button function, can also set other correlation functions as required, as copied, sharing, bookmark, annotations and comments, search etc., to enrich the operability of user, do not repeat them here.Preferably, the second inductance L 2 is also comprised (for eliminating the interference in operating circuit between booster circuit and key circuit, its jamproof concrete principle is with the first inductance L 1, do not repeat them here), and the first resistance R1, second resistance R2, button S, first diode D1 and the second diode D2, storage capacitor C1 is connected with the first inductance L 1 with the second diode D2 by the first resistance R1, the anode of the second diode D1 is by the second resistance R2 ground connection, the negative electrode of the first diode D1 is connected with the Enable Pin CE of booster circuit by the second inductance L 2, first diode D1 anode is connected with the first inductance L 1 by button S, this first diode D1 is used for providing voltage protection, prevent button from connecting instantaneously to the destruction of Enable Pin CE.When time writer dormancy, the radiating circuit of time writer is work not, such as, can be because booster circuit does not work, radiating circuit operating voltage the reason such as to cause not; When push button S time, Enable Pin CE receives a rising edge, and booster circuit is started working, and the voltage that the output end vo ut of booster circuit exports is enough to the radiating circuit work making time writer, thus launches radio magnetic wave to magnetic board.
Wireless charging time writer disclosed by the invention charges to time writer without the need to independent going; but in the process used; if the electric quantity consumption of time writer meets certain condition and just charged by magnetic board from trend time writer and be automatically full of the automatic stopping after electricity and receive charging signals circuit protection, reduce the wasting of resources.In one embodiment of the invention, magnetic board is used for:
Judge whether the electric current of the transmitting coil in magnetic board is less than predetermined threshold value, if be less than predetermined threshold value, then:
Judge the electromagnetic wave signal whether magnetic board receives time writer and send, if receive electromagnetic wave signal, then:
Magnetic board terminates to time writer emitting electromagnetic wave.
There will be following two kinds of situations: one is write on magnetic board when time writer when time writer charges, and time writer is about to be full of electricity, the charging current of the transmitting coil of magnetic board will diminish, now time writer can to electromagnetic screen emitting electromagnetic wave, and two is that charging current also can diminish when time writer is away from magnetic board, the electromagnetic wave that now time writer is launched cannot be received by electromagnetic screen, therefore, during by judging that the electric current of transmitting coil is less than predetermined threshold value, above two kinds of situations can be judged.For ensureing the accuracy judged, if magnetic board detects the input of time writer, then illustrate that time writer is just at the enterprising line operate of magnetic board, therefore, if judge that magnetic board receives the input of time writer, can judge that time writer is in the nearer scope of magnetic board and time writer is comparatively large close to the possibility being full of electricity, therefore at this time magnetic board can terminate to time writer emitting electromagnetic wave.The mode that the charging of this time writer controls, had both been supplied to user and had namely got high experience sense namely, and can charge in use again simultaneously, effectively utilize electric power resource, decrease the waste to the energy.
Preferably, what magnetic board of the present invention adopted is inside and outside two transmitting coils, each transmitting coil by independently port controlling separately, between the backlight LED that transmitting coil is outside located at interior transmitting coil and magnetic board and driving circuit thereof.Backlight LED due to magnetic board is arranged on four lateral periphery of magnetic board, easily there is electromagnetic radiation in its driving circuit in the situations such as voltage fluctuation, therefore, electromagnetic radiation can disturb two transmitting coil emitting electromagnetic waves, such as electromagnetic wave cannot effectively be launched, and the electromagnetic frequency that time writer receives is fixing, therefore time writer possibly cannot receive the electromagnetic wave that electromagnetic screen is launched, thus affects the charging of time writer.By two independently port control respective coil working respectively, therefore, two coils are reduced by the probability of electromagnetic interference (EMI) simultaneously; In addition, transmitting coil outside plays in interior transmitting coil shielding action, therefore, even if the electromagnetic radiation of backlight LED transmitting coil outside, and equally can normal transmission at interior transmitting coil.Thus the situation that can reduce time writer charging interruption occurs.
Those skilled in the art will recognize that, it is possible for making numerous accommodation to above description, so embodiment is only used to describe one or more particular implementation.
Although described and described and be counted as example embodiment of the present invention, it will be apparent to those skilled in the art that and can make various change and replacement to it, and spirit of the present invention can not have been departed from.In addition, many amendments can be made so that particular case is fitted to religious doctrine of the present invention, and central concept of the present invention described here can not be departed from.So the present invention is not limited to specific embodiment disclosed here, but the present invention also may comprise all embodiments and equivalent thereof that belong to the scope of the invention.
Claims (5)
1. a wireless charging time writer, comprise charge coil, rectification circuit, storage capacitor and radiating circuit, described charge coil, rectification circuit, storage capacitor and radiating circuit are electrically connected successively, described charge coil receives the electromagnetic wave signal from magnetic board and exports induction current, described rectification circuit carries out rectification to induction current, electric current after described rectification is used for charging to described storage capacitor, described time writer passes through described radiating circuit to magnetic board emitting electromagnetic wave, it is characterized in that: between described storage capacitor and described radiating circuit, also comprise the first inductance and booster circuit, the input end of described booster circuit is connected with described storage capacitor, the output terminal of described booster circuit is connected with described first inductance, described first inductance is for isolating the receive frequency of described charge coil to the interference of the transmission frequency of described radiating circuit, described booster circuit is for stablizing the voltage of described radiating circuit.
2. wireless charging time writer as claimed in claim 1, is characterized in that: also comprise the charge protector be connected with described storage capacitor.
3. wireless charging time writer as claimed in claim 1, it is characterized in that: described radiating circuit also comprises key circuit, described key circuit comprises keyswitch and electric capacity, described keyswitch is connected in parallel in the electric capacity two ends of described radiating circuit again after being connected with described capacitances in series, when described keyswitch is switched on, the capacitance of described radiating circuit changes.
4. wireless charging time writer as claimed in claim 3, it is characterized in that: also comprise the first resistance, the second resistance, the first diode and the second diode, described storage capacitor is connected with the first inductance with the second diode by the first resistance, the anode of the second diode is by the second resistance eutral grounding, the negative electrode of the first diode is connected with the Enable Pin of booster circuit by the second inductance, and the first diode anode is connected with the first inductance by button.
5. a wireless charging time writer system, comprises the arbitrary described time writer of Claims 1-4, also comprises magnetic board, it is characterized in that: described magnetic board is used for:
Judge whether the electric current of the transmitting coil in described magnetic board is less than predetermined threshold value, if be less than described predetermined threshold value, then:
Judge the electromagnetic wave signal whether described magnetic board receives described time writer and send, if receive described electromagnetic wave signal, then:
Described magnetic board terminates to described time writer emitting electromagnetic wave.
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| CN201410492123.1A CN104598052B (en) | 2014-09-23 | 2014-09-23 | A kind of wireless charging time writer and its system |
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| CN201410492123.1A CN104598052B (en) | 2014-09-23 | 2014-09-23 | A kind of wireless charging time writer and its system |
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| CN104598052A true CN104598052A (en) | 2015-05-06 |
| CN104598052B CN104598052B (en) | 2018-03-30 |
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Cited By (12)
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| CN104881192A (en) * | 2015-05-28 | 2015-09-02 | 努比亚技术有限公司 | Operation recognition method and device, and terminal |
| CN106313549A (en) * | 2015-06-18 | 2017-01-11 | 成都金采科技有限公司 | 3D printer |
| CN106313550A (en) * | 2015-06-18 | 2017-01-11 | 成都金采科技有限公司 | 3D printing device with wireless charging function |
| CN107346906A (en) * | 2016-05-06 | 2017-11-14 | 宏碁股份有限公司 | The method of wireless system, active pen and switch mode |
| CN107621895A (en) * | 2017-10-31 | 2018-01-23 | 深圳市精源宇科技有限公司 | Electromagnetic input device |
| CN108228018A (en) * | 2018-03-08 | 2018-06-29 | 江西蓝沛泰和新材料有限公司 | Has the touch harden structure of wireless charging link |
| TWI656458B (en) * | 2018-03-31 | 2019-04-11 | 幸芯科技有限公司 | Wireless charging active stylus |
| CN110119215A (en) * | 2019-05-24 | 2019-08-13 | 深圳市优笔触控科技有限公司 | Twin coil wireless and passive digital electromagnetic writing pencil |
| CN112286381A (en) * | 2020-12-30 | 2021-01-29 | 深圳市千分一智能技术有限公司 | Communication control method and active capacitance pen |
| CN113432516A (en) * | 2020-03-23 | 2021-09-24 | 深圳普赢创新科技股份有限公司 | Electromagnetic induction type coordinate positioning device |
| CN115549230A (en) * | 2022-01-25 | 2022-12-30 | 荣耀终端有限公司 | Charging control circuit and terminal |
| CN115995875A (en) * | 2023-03-23 | 2023-04-21 | 国网湖北省电力有限公司经济技术研究院 | Energy storage system applied to current transformer electricity taking and control method thereof |
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| TWI656458B (en) * | 2018-03-31 | 2019-04-11 | 幸芯科技有限公司 | Wireless charging active stylus |
| CN110119215A (en) * | 2019-05-24 | 2019-08-13 | 深圳市优笔触控科技有限公司 | Twin coil wireless and passive digital electromagnetic writing pencil |
| CN113432516A (en) * | 2020-03-23 | 2021-09-24 | 深圳普赢创新科技股份有限公司 | Electromagnetic induction type coordinate positioning device |
| CN112286381A (en) * | 2020-12-30 | 2021-01-29 | 深圳市千分一智能技术有限公司 | Communication control method and active capacitance pen |
| CN115549230A (en) * | 2022-01-25 | 2022-12-30 | 荣耀终端有限公司 | Charging control circuit and terminal |
| CN115995875A (en) * | 2023-03-23 | 2023-04-21 | 国网湖北省电力有限公司经济技术研究院 | Energy storage system applied to current transformer electricity taking and control method thereof |
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Effective date of registration: 20200424 Address after: Room 715, 7 / F, building 1, Huaqiang electronic world, No. 1005, 1007, 1015, Huaqiang North Road, Huaqiang North Street, Futian District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Huaqiang Technology Co., Ltd Address before: 518000 Guangdong city of Shenzhen province Futian District Mei Xiu Lu 1-1, Huaqiang cloud Industrial Park 1 2 floor Patentee before: CLOUD HQ INVESTMENT HOLDINGS Co.,Ltd. |