CN101957706B - Electromagnetic handwritten device - Google Patents

Electromagnetic handwritten device Download PDF

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Publication number
CN101957706B
CN101957706B CN2010102982957A CN201010298295A CN101957706B CN 101957706 B CN101957706 B CN 101957706B CN 2010102982957 A CN2010102982957 A CN 2010102982957A CN 201010298295 A CN201010298295 A CN 201010298295A CN 101957706 B CN101957706 B CN 101957706B
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signal
coil
control part
power
transmitting element
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CN101957706A (en
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尹航
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Hanwang Technology Co Ltd
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Hanwang Technology Co Ltd
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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

The hand-written equipment of electromagnetism
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 are sent 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 is sent coils to many group of received coil with many groups and is scanned, and confirming 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 are sent 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, and it is very strong therefore to receive signal, 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.Owing to no matter receive signal magnitude, 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 the transmission coil that receives electromagnetic receiving coil and launching electromagnetic wave, its receiving coil is provided with many groups respectively with the transmission coil, and homeotropic alignment becomes latticed each other; Control part; Receiving element, it receives signal, handles this signal from said receiving coil, and this signal after will handling is sent to said control part; And transmitting element, its signal to said control part output is handled, and sends to said transmission coil; Wherein, the intensity of the signal that said control part receives according to said receiving element transmits control signal to said transmitting element; Said transmitting element is according to said control signal; Adjustment is to the power of said transmission coil transmission signal, particularly
When electromagnetism input pen during near magnetic board, said control part control transmitting element sends signal with smaller power to sending coil;
When the electromagnetism input pen left magnetic board, said control part control transmitting element sent signal with more high-power to sending coil.
Said transmitting element has the multi-channel switch that is used for sending to said transmission coil the power of signal; Regulate the power of said transmission signal through different switch in the said multi-channel switch of gating; Wherein, a plurality of output terminals of multi-channel switch are connected with a plurality of pull-up resistors of different resistances respectively, can switch the transmitted power of transmitting element; Make transmitting element with different capacity to sending coil power supply, thereby switch the transmitted power of sending coil.
The hand-written equipment of electromagnetism of the present invention is through utilizing control part adjustment transmitting element to the power that sends the coil supply capability; Make transmitting element nearer or when contacting apart from magnetic board, send signal with miniwatt with magnetic board at time writer, 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 in sending part, uses analog switch in one embodiment of the present of invention.
Embodiment
Below, be described with reference to the accompanying drawings 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; The magnetic board 120 that sends coil 121 and receiving coil 122 is arranged in set inside; Transmission coil 121 to being arranged in the magnetic board 120 drives, and makes 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 be provided with many groups respectively, and homeotropic alignment becomes latticed each other with receiving coil 122.
Identical with the hand-written equipment of electromagnetism in the past, in this embodiment, when the sending part energising, when forming electromagnetic field in its outside, control part 150 control acceptance divisions 140 are to scan many group of received coil 122 one by one.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, through 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 through 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 this embodiment; Control part 150 receives from the reception signal of acceptance division 140 and obtains its strength information, receives signal strength information control sending part 130 according to this and supplies with the power that sends signal 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 handled.Acceptance division 140 sends the strength information of the received electromagnetic signal of expression to control part 150 simultaneously.
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, and 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 time writer 110 position Detection.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 the user begins to import once more, 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 in this embodiment, adopting model is the analog switch chip of 74HC4051, wherein; X0~X7 is an output terminal; X is an input end, and GA, GB, three terminals of GC are used to receive the signal that slave controller sends over, thereby selects which passage among conducting X0~X7.Last at X0~X7, be connected with a plurality of pull-up resistors of different resistances respectively, can switch the transmitted power of sending part 130, make the sending part 130 can be, thereby switch the transmitted power of sending coil 121 with different capacity to sending coil 121 power supplies.
And, in this embodiment, because the IC1 in the sending part 130 has adopted the analog switch chip of 74HC4051, thereby, from the digital signal of control part 150 to terminal GA, GB, GC transmission 3bit, thus the switching of 8 kinds of transmitted powers of realization 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 (3)

1. the hand-written equipment of electromagnetism is characterized in that, comprising:
The electromagnetism input pen;
Magnetic board with the transmission coil that receives electromagnetic receiving coil and launching electromagnetic wave, its receiving coil is provided with many groups respectively with the transmission coil, and homeotropic alignment becomes latticed each other;
Control part;
Receiving element, it receives signal, handles this signal from said receiving coil, and this signal after will handling is sent to said control part; And transmitting element, its signal to said control part output is handled, and sends to said transmission coil,
Wherein,
The intensity of the signal that said control part receives according to said receiving element transmits control signal to said transmitting element,
Said transmitting element is adjusted the power that sends signal to said transmission coil according to said control signal, particularly,
When electromagnetism input pen during near magnetic board, said control part control transmitting element sends signal with smaller power to sending coil;
When the electromagnetism input pen left magnetic board, said control part control transmitting element sent signal with more high-power to sending coil;
Said transmitting element has the multi-channel switch that is used for sending to said transmission coil the power of signal; Regulate the power of said transmission signal through different switch in the said multi-channel switch of gating; Wherein, a plurality of output terminals of multi-channel switch are connected with a plurality of pull-up resistors of different resistances respectively, can switch the transmitted power of transmitting element; Make transmitting element with different capacity to sending coil power supply, thereby switch the transmitted power of sending coil.
2. the hand-written equipment of electromagnetism according to claim 1 is characterized in that: said multi-channel switch is an analog switch.
3. the hand-written equipment of electromagnetism according to claim 1 is characterized in that said receiving element comprises:
Amplifying circuit, it amplifies the signal that receives from said receiving coil;
The orthogonal processing circuit, it carries out orthogonal processing to the signal from said amplifying circuit output; And
Integrating circuit, it carries out integration to the signal from said orthogonal processing circuit output, and sends said control part to.
CN2010102982957A 2010-09-30 2010-09-30 Electromagnetic handwritten device Active CN101957706B (en)

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Families Citing this family (10)

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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
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
CN106445067B (en) * 2016-08-31 2019-12-13 上海芯什达电子技术有限公司 method for reducing 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
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
CN113358014B (en) 2020-03-06 2023-02-24 深圳普赢创新科技股份有限公司 Electromagnetic induction type coordinate positioning device

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Publication number Priority date Publication date Assignee Title
CN101387928A (en) * 2007-09-10 2009-03-18 株式会社和冠 Position-detecting apparatus and position-detecting method
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
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

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101387928A (en) * 2007-09-10 2009-03-18 株式会社和冠 Position-detecting apparatus and position-detecting method
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
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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