CN101957706A - Electromagnetic handwritten device - Google Patents
Electromagnetic handwritten device Download PDFInfo
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- CN101957706A CN101957706A CN 201010298295 CN201010298295A CN101957706A CN 101957706 A CN101957706 A CN 101957706A CN 201010298295 CN201010298295 CN 201010298295 CN 201010298295 A CN201010298295 A CN 201010298295A CN 101957706 A CN101957706 A CN 101957706A
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Abstract
The invention provides an electromagnetic handwritten device, comprising an electromagnetic input pen, an electromagnetic plate, a control part, a receiving unit and a transmitting unit. The electromagnetic plate is provided with a receiving coil and a transmitting coil; the receiving unit receives signals from the receiving coil to process and transmits the processed signals to the control part; and the transmitting unit processes the signals output by the control part and transmits the signals to the transmitting coil, wherein the control part transmits a control signal to the transmitting unit according to the strength of the signals received by the receiving unit, and the transmitting unit regulates the power of signals transmitted to the transmitting coil according to the control signal. The invention can reduce the power consumption of the electromagnetic handwritten device when a user carries out the input operation, meet the requirements of a mobile device and reduce the interference on other devices as smaller as possible.
Description
Technical field
The present invention relates to a kind of hand-written equipment, the hand-written equipment of particularly a kind of electromagnetism.
Background technology
In the prior art, the hand-written equipment of electromagnetism generally comprises: the writing pencil with electromagnetic oscillation circuit; Many groups send coil; Send electromagnetic transmitting element to sending the coil supply capability; With the many groups of many group of received coils that send the coil homeotropic alignment; Control part with control receiving coil scanning motion.Control part control sends coils to many group of received coil and many groups and scans, and determining the time writer position when the hand-written equipment work of electromagnetism, it all is certain that the signal magnitude that no matter receives, many groups send the power that coils send signals.
But, when time writer when being provided with the handwriting pad of receiving coil, because time writer is very near apart from handwriting pad, the inductive electromagnetic intensity of wave that time writer produces in receiving coil is big, therefore received signal is very strong, so the actual transmitting element that do not need sends the location that very strong signal just can carry out writing pencil.So send unnecessary strong signal and promptly cause energy dissipation this moment, also is unfavorable for reducing the power consumption of entire equipment, when especially the hand-written equipment of electromagnetism being applied to mobile device, need reduce the power consumption of equipment as far as possible.Because received signal size no matter, the transmitted power of transmitting element all is certain in addition, and the external radiation of promptly whole electromagnetism hand writing system is certain, therefore can cause interference to other equipment.
Summary of the invention
The object of the present invention is to provide a kind of low-power consumption, the low hand-written equipment of electromagnetism that disturbs.
The hand-written equipment of electromagnetism of the present invention comprises: the electromagnetism input pen; Magnetic board with receiving coil and transmission coil; Control part; Receiving element, its from described receiving coil received signal, handle this signal, and this signal after will handling is sent to described control part; And transmitting element, its signal to described control part output is handled, and send to described transmission coil, wherein, the intensity of the signal that described control part receives according to described receiving element, transmit control signal to described transmitting element, described transmitting element is adjusted the power that sends signal to described transmission coil according to described control signal.
The hand-written equipment of electromagnetism of the present invention is adjusted transmitting element to the power that sends the coil supply capability by utilizing control part, make transmitting element nearer or when contacting apart from magnetic board with magnetic board at time writer, send signal with miniwatt, when far away apart from magnetic board with high-power transmission electromagnetic wave, thereby can be when the user carries out input operation, reduce the power consumption of the hand-written equipment of electromagnetism, be adapted to the demand of mobile device, and can reduce interference other equipment.
Description of drawings
Fig. 1 is the structural representation of the hand-written equipment of electromagnetism of one embodiment of the present of invention.
Fig. 2 is the structured flowchart of the acceptance division of one embodiment of the present of invention.
Fig. 3 is the structural drawing of the sending part of one embodiment of the present of invention.
Fig. 4 is the circuit diagram that uses analog switch in one embodiment of the present of invention in sending part.
Embodiment
Below, be described with reference to the accompanying drawings the specific embodiment of the present invention.
Fig. 1 is the structural representation of the hand-written equipment of electromagnetism of one embodiment of the present of invention.As shown in Figure 1, this electromagnetism handwriting device 10 comprises: the writing pencil 110 with electromagnetic resonant circuit; Be provided with the magnetic board 120 that sends coil 121 and receiving coil 122 in inside; The transmission coil 121 that is arranged in the magnetic board 120 is driven, make it the sending part 130 of launching electromagnetic wave; Be connected with receiving coil 122, receive from the electromagnetic acceptance division 140 that sends coil 121; With control part 150.In the magnetic board 120 of Fig. 1, send coil 121 and receiving coil 122 and be provided with many groups respectively, and homeotropic alignment becomes latticed mutually.
Identical with the hand-written equipment of electromagnetism in the past, in the present embodiment, when the sending part energising, when forming electromagnetic field in its outside, control part 150 control acceptance divisions 140 are to scan one by one many group of received coil 122.When writing pencil approaching/when contact, resonant circuit in the writing pencil 110 also receives and sends the electromagnetic signal generation electromagnetic induction that coil 121 sends, and the radioinduction electromagnetic wave, by scanning receiving coil one by one, thereby accurately detect time writer 110 approaching/position contacting.
But in the prior art, in the hand-written equipment of electromagnetism in the past, 150 of control parts are controlled so that receiving coil 121 is scanned one by one acceptance division 140.But as sending coil 122, because it always is in "on" position, thereby the power consumption of equipment becomes main problem, especially in mobile device, need obtain electric power by mobile device, do not fit into to move and uses.
Different with the hand-written equipment of existing electromagnetism, as shown in Figure 1, in the hand-written equipment 10 of the electromagnetism of present embodiment, control part 150 receives from the received signal of acceptance division 140 and obtains its strength information, supplies with the power that sends signal according to this received signal strength information control sending part 130 to sending coil 121.Be elaborated below.
Fig. 2 is the structured flowchart of acceptance division 140.The receiving coil 122 of magnetic board 120 is sensed the secondary electromagnetic wave that time writer produces, and this electromagnetic wave signal is transformed to electric signal is input to acceptance division 140.As shown in Figure 2, acceptance division 140 comprises amplifier 141, automatic gain controller 142, quadrature decomposition circuit 143, integrating circuit 144, and AD (Analog-Digital) translation circuit 145.Amplifier 141 amplifies to the received signal, and outputs to automatic gain control circuit 142.Automatic gain control circuit 142 carries out sending signal to quadrature decomposition circuit 143 and integrating circuit 144 after the automatic gain control, detect the position of time writer 110, AD translation circuit 145 is transformed into digital signal with simulating signal and sends to control part 150 afterwards, carries out respective handling.Acceptance division 140 sends the strength information of the received electromagnetic signal of expression simultaneously to control part 150.
When the intensity of the electromagnetic signal that receives is big, represent that promptly time writer 110 is near apart from magnetic board 120 distances, otherwise expression time writer 110 is apart from magnetic board 120 distance.Corresponding therewith, control part 150 control sending parts 130 when the electromagnetic signal strength that receives is big, send with miniwatt, otherwise with high-power transmission.The user is when using time writer 110 to import, have make time writer 110 near and contact the action of magnetic board 120, the action that makes time writer 110 magnetic boards 120 away from keyboard is also arranged, when time writer 110 contact magnetic boards 120, normally the user is carrying out input information, when time writer 110 leaves magnetic board 120, interval time of input information normally.The transmitted power of control part 150 control sending parts 130 makes that sending part 130 sends electromagnetic wave with miniwatt when user's input information, time writer 110 contact magnetic boards 120.At this moment, because time writer 110 is enough approaching with the distance of magnetic board 120, can not influence detection to time writer 110 positions.When the user temporarily stops input, when making time writer 110 magnetic board 120 away from keyboard, control part 150 control sending parts 130 send electromagnetic wave with bigger power, can when beginning to import once more, the user detect the position of time writer 110 apace, can not influence the continuity of user's input action, thereby can under the situation that keeps hand-written equipment 10 functions of electromagnetism, reduce the power consumption of equipment.
Action when specifying sending part 130 change transmitted powers below.Fig. 3 is the structural drawing of sending part 130.In sending part 130, be provided with multi-channel switch 131.According to control signal from control part 150, multi-channel switch 131 switches the size to the electric current that sends coil 121 supplies, thereby when time writer 110 contact/near magnetic board 120, the transmitted power of sending part 130 is diminished, during away from magnetic board 120, make the transmitted power of sending part 130 become big at time writer 110.
Fig. 4 is the circuit structure diagram of multi-channel switch 131.In Fig. 4, IC1 is a switch chip, and adopting model in the present embodiment is the analog switch chip of 74HC4051, wherein, X0 ~ X7 is an output terminal, and X is an input end, GA, GB, three terminals of GC are used to receive the signal that slave controller sends over, thereby select which passage among conducting X0 ~ X7.On X0 ~ X7, be connected with a plurality of pull-up resistors of different resistances respectively, can switch the transmitted power of sending part 130, sending part 130 can be powered to sending coil 121 with different capacity, thereby switch the transmitted power that sends coil 121.
And, in the present embodiment, because the IC1 in the sending part 130 has adopted the analog switch chip of 74HC4051, thereby, send the digital signal of 3bit from control part 150 to terminal GA, GB, GC, thereby realize the switching of 8 kinds of transmitted powers of sending part 130.When the electromagnetic signal strength that receives when receiving coil 122 was big, multi-channel switch 131 was switched to the path of high value, otherwise switches to the path of low resistance, realized the low-power consumption of the hand-written equipment 10 of electromagnetism.
More than describe the present invention, it will be appreciated by those skilled in the art that the present invention does not limit to the foregoing description with a concrete example.Such as, can not use analog switch IC1 shown in Figure 4, and adopt other control mode.In addition, in the above-described embodiments, control part 150 output digital signals, control analog switch IC1, realization with 8 kinds of different power to sending coil 121 supply capabilities, but the quantity of transmitted power is constituted to simplify circuit less than 8, perhaps adopt transmitted power, to realize switching continuously the reliability of the position probing of guaranteeing time writer 110 more than 8 kinds.Equally, control part 150 also can use simulating signal to carry out the control of transmitted power, realizes the power adjustment of continuous variable.
The hand-written equipment 10 of electromagnetism according to the present invention can reduce power consumption when the user uses the hand-written equipment 10 of electromagnetism to import, be suitable for the input demand of mobile device, and can reduce the interference to other equipment.
Claims (4)
1. the hand-written equipment of electromagnetism is characterized in that, comprising:
The electromagnetism input pen;
Magnetic board with receiving coil and transmission coil;
Control part;
Receiving element, its from described receiving coil received signal, handle this signal, and this signal after will handling is sent to described control part; And
Transmitting element, its signal to described control part output is handled, and sends to described transmission coil,
Wherein,
The intensity of the signal that described control part receives according to described receiving element transmits control signal to described transmitting element,
Described transmitting element is adjusted the power that sends signal to described transmission coil according to described control signal.
2. the hand-written equipment of electromagnetism according to claim 1 is characterized in that:
Described transmitting element has the multi-channel switch that is used for sending to described transmission coil the power of signal, regulates the power of described transmission signal by different switch in the described multi-channel switch of gating.
3. the hand-written equipment of electromagnetism according to claim 2 is characterized in that: described multi-channel switch is an analog switch.
4. the hand-written equipment of electromagnetism according to claim 1 is characterized in that described receiving element comprises:
Amplifying circuit, it amplifies the signal that receives from described receiving coil;
The orthogonal processing circuit, it carries out orthogonal processing to the signal from described amplifying circuit output; And
Integrating circuit, it carries out integration to the signal from described orthogonal processing circuit output, and sends described control part to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102982957A CN101957706B (en) | 2010-09-30 | 2010-09-30 | Electromagnetic handwritten device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102982957A CN101957706B (en) | 2010-09-30 | 2010-09-30 | Electromagnetic handwritten device |
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| Publication Number | Publication Date |
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| CN101957706A true CN101957706A (en) | 2011-01-26 |
| CN101957706B CN101957706B (en) | 2012-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010102982957A Active CN101957706B (en) | 2010-09-30 | 2010-09-30 | Electromagnetic handwritten device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681744A (en) * | 2011-03-17 | 2012-09-19 | 太瀚科技股份有限公司 | Digitizer with frequency spreading circuit |
| CN102799335A (en) * | 2011-05-23 | 2012-11-28 | 太瀚科技股份有限公司 | Digitizer with phase lock loop |
| CN102799333A (en) * | 2011-05-24 | 2012-11-28 | 汉王科技股份有限公司 | Electromagnetic touch device and control method thereof |
| CN103092382A (en) * | 2011-11-03 | 2013-05-08 | 中兴通讯股份有限公司 | Device and method for detecting and processing |
| CN103793122A (en) * | 2012-10-26 | 2014-05-14 | 汉王科技股份有限公司 | Electromagnetic touch device and electromagnetic touch method |
| CN106445067A (en) * | 2016-08-31 | 2017-02-22 | 上海芯什达电子技术有限公司 | Method for lowering power consumption of electronic pen, low-power-consumption electronic pen and electronic writing system |
| CN107632735A (en) * | 2017-09-22 | 2018-01-26 | 深圳市德安里科技有限公司 | A kind of handwriting device, liquid crystal handwriting board device and method for deleting |
| CN108345412A (en) * | 2018-02-06 | 2018-07-31 | 深圳市合众力拓科技有限公司 | Digitizing plate, input processing method and device |
| CN110413160A (en) * | 2019-07-26 | 2019-11-05 | 青岛罗博数码科技有限公司 | A kind of electromagnetic touch-control device and its driving circuit |
| JP2021140725A (en) * | 2020-03-06 | 2021-09-16 | 深▲セン▼普贏創新科技股▲分▼有限公司 | Electromagnetic induction type coordinate positioning apparatus |
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| CN101387904A (en) * | 2007-09-10 | 2009-03-18 | 汉王科技股份有限公司 | Electromagnetical type touch screen electricity saving device |
| CN101387928A (en) * | 2007-09-10 | 2009-03-18 | 株式会社和冠 | Position-detecting apparatus and position-detecting method |
| 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 |
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| CN101387904A (en) * | 2007-09-10 | 2009-03-18 | 汉王科技股份有限公司 | Electromagnetical type touch screen electricity saving device |
| CN101387928A (en) * | 2007-09-10 | 2009-03-18 | 株式会社和冠 | Position-detecting apparatus and position-detecting method |
| 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 |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681744A (en) * | 2011-03-17 | 2012-09-19 | 太瀚科技股份有限公司 | Digitizer with frequency spreading circuit |
| CN102799335A (en) * | 2011-05-23 | 2012-11-28 | 太瀚科技股份有限公司 | Digitizer with phase lock loop |
| CN102799333B (en) * | 2011-05-24 | 2016-03-02 | 汉王科技股份有限公司 | Electromagnetic touch-control device and control method thereof |
| CN102799333A (en) * | 2011-05-24 | 2012-11-28 | 汉王科技股份有限公司 | Electromagnetic touch device and control method thereof |
| CN103092382A (en) * | 2011-11-03 | 2013-05-08 | 中兴通讯股份有限公司 | Device and method for detecting and processing |
| CN103793122B (en) * | 2012-10-26 | 2016-12-21 | 汉王科技股份有限公司 | Electromagnetic touch-control device and electromagnetic touch method |
| CN103793122A (en) * | 2012-10-26 | 2014-05-14 | 汉王科技股份有限公司 | Electromagnetic touch device and electromagnetic touch method |
| CN106445067A (en) * | 2016-08-31 | 2017-02-22 | 上海芯什达电子技术有限公司 | Method for lowering power consumption of electronic pen, low-power-consumption electronic pen and electronic writing system |
| CN107632735A (en) * | 2017-09-22 | 2018-01-26 | 深圳市德安里科技有限公司 | A kind of handwriting device, liquid crystal handwriting board device and method for deleting |
| CN108345412A (en) * | 2018-02-06 | 2018-07-31 | 深圳市合众力拓科技有限公司 | Digitizing plate, input processing method and device |
| CN110413160A (en) * | 2019-07-26 | 2019-11-05 | 青岛罗博数码科技有限公司 | A kind of electromagnetic touch-control device and its driving circuit |
| CN110413160B (en) * | 2019-07-26 | 2023-05-02 | 青岛罗博数码科技有限公司 | Electromagnetic touch device and driving circuit thereof |
| JP2021140725A (en) * | 2020-03-06 | 2021-09-16 | 深▲セン▼普贏創新科技股▲分▼有限公司 | Electromagnetic induction type coordinate positioning apparatus |
| US11221721B2 (en) | 2020-03-06 | 2022-01-11 | Shenzhen Pu Ying Innovation Technology Corp., Ltd. | Electromagnetic induction type coordinate positioning apparatus |
| JP7109510B2 (en) | 2020-03-06 | 2022-07-29 | 深▲セン▼普贏創新科技股▲分▼有限公司 | Electromagnetic induction type coordinate positioning device |
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|---|---|
| CN101957706B (en) | 2012-07-18 |
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