CN1506906A - Digital board system with multiple-channel switch combination circuit control - Google Patents
Digital board system with multiple-channel switch combination circuit control Download PDFInfo
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- CN1506906A CN1506906A CNA021546002A CN02154600A CN1506906A CN 1506906 A CN1506906 A CN 1506906A CN A021546002 A CNA021546002 A CN A021546002A CN 02154600 A CN02154600 A CN 02154600A CN 1506906 A CN1506906 A CN 1506906A
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Abstract
The present invention aims at improving control circuit to reduce the power consumption of transmission and receiving between the digital board system and radio battery-free pointer equipment. One multi-channel switch combination circuit manufactured via semiconductor technological process is provided to substitute available analog switch and tristate module in transmission/receiving signal selector in induction loop of digital board. The present invention results in simplified control circuit, raised power utility of transmission and receiving between the digital board system and radio battery-free pointer equipment and raised signal response speed of transmission and receiving between the digital board system and radio battery-free pointer equipment.
Description
Technical field
The present invention relates to a kind of digiboard system and signal thereof and transmit and method of reseptance, particularly have digiboard system and the signal transmission and the method for reseptance of loop inductance and wireless-no battery pointing device with two-way multichannel switch combination circuit control with multichannel switch combination circuit control loop inductance and wireless-no battery pointing device.
Background technology
Because hand-written input circuit equipment can replace mouse, and more is fit to allow the user carry out the input of literal and pattern in the mode of artificial input than mouse, so the improvement of hand-written input circuit equipment is the field of sharply developing in recent years.Early stage hand-written input circuit equipment replaces mouse with pen; and in order to promote the user at operational convenience; usually with wireless indicator equipment (pen, mouse, positioning disk .... or the like) the two replaces mouse with digiboard (tablet), wherein the nib of wireless pen usually can be corresponding with the left button of mouse.Year more than though traditional pen type input product has been gone, yet like product all only biases toward in the application of simple functions such as drawing or input in Chinese.
Traditional EM induction system has the transducer/pointing device of a digiboard and a mouse or pen type.Generally speaking, on the surface of digiboard, determine the position of a described point that two kinds of patterns are arranged: one is relative pattern, and another is an absolute mode.General mouse device is with relative mode operating, when mouse slides on the digiboard surface, computer system can receive the input from mouse, it only can this mouse of identification relatively moving on X and Y direction, a kind of general technology is to utilize a sensing apparatus in this mouse, forming a pair of mutually perpendicular figure signal, this is vertically corresponding with horizontal mobile phase to signal and this mouse.Relatively, the cursor device in the digiboard, for example, wireless indicator equipment generally operates under absolute mode.If mention this cursor device, and move on the another location on its digiboard surface, for this computer system, signal can change to react a new absolute position of this cursor device.Now, existing several different methods is with deciding this cursor device in the lip-deep position of the digiboard of its support, and wherein, the electromagnetic field inducing technology is a kind of technology that is widely used in absolute mode.Early stage transducer/pointing device is connected to digiboard by multiconductor cable, is sent in the computer system via the information of computing machine transport interface with position and button/pressure again.Wireless type transducer/pointing device in some conventional art, once represented the non-orientation state of transducer/pointing device function by the mode of frequency of utilization and/or phase change, these functions have: the button of pressing, the pressure of pointing device, or similar function etc.Yet if there is not scrupulous processing, the change of frequency and phase place is easily because multiple external factor, as metal, noise, external electromagnetic field .... or the like, and then cause erroneous judgement on the pointing device function.Particularly in bigger digiboard, it is obvious more that these problems become.The improving technology of traditional digiboard system allows the user to use described point equipment with double mode function mode, therefore can provide to relatively move or the information of absolute position under user's control.
Existing pointing device formula input product is generally a kind of electromagnetic induction circuit arrangement, and it often comprises an electromagnetism pointing device (electromagnetic pointer device) and a digiboard (digitizer tablet; Be called for short tablet later on).Have the energy of a battery in the electromagnetism pointing device, and have a concussion circuit in the electromagnetism pointing device with supply emission associated electrical magnetic signal.With the electromagnetism pointing device is example, when touching the nib of pointing device, will produce the variation of inductance value, thereby makes the concussion frequency also change thereupon.The variation of the big more then inductance value of pressure that presses the pointing device tip is big more, thereby the variable quantity of concussion frequency is big more, so by the variation size of frequency, just know the size that puts on the pointing device tip pressure.Two switch keys are also arranged on the side of wireless indicator equipment, by the joint of button/leave the specific capacitor that makes in the oscillator participate in/not participate in vibration, thereby change the transmission frequency of pointing device, by the difference of frequency, can predict why button of switch key that the user presses.
In addition, digiboard (tablet) has also comprised detecting loop (detective loop), amplifier (amplifier), analog-digital converter (Analog to Digital Converter; Assembly such as ADC).The zone is write by the central authorities of the handwriting pad of this quasi-tradition, is formed for weaving by loop inductance, in this zone, with the two-sided layout of circuit board and use two axially with the equidistant loop inductances of arranging of array mode.The main application of this loop inductance only is to receive the electromagnetic signal that the special electromagnetic pointing device is launched.When electromagnetism pointing device emission electromagnetic signal, loop inductance will receive this electromagnetic signal, and via the processing of circuit, and obtain the pointing device relevant information.Generally speaking, the loop inductance of traditional electromagnetic induction device and topological design thereof equidistantly are arranged in grid network with loop inductance with X, Y-axis array, draw its absolute coordinates with inductive electromagnetic pointing device and calculating.Because magnetic field intensity and square distance are inversely proportional to, the electromagnetism pointing device of launching electromagnetic field when far away more, can make that the received signal of loop inductance is faint more apart from loop inductance; Relatively, the electromagnetism pointing device of emission electromagnetic field when near more, can make that the received signal of loop inductance is strong more apart from loop inductance.Therefore,, and analyze the received signal power of each loop inductance, be positioned at the scope of that loop inductance just can learn the electromagnetism pointing device, and then calculate its position coordinates as long as allow the microprocessor all loop inductances of P-SCAN one by one of digiboard.Yet for large-area digiboard, the loop inductance quantity of its layout also increases thereupon, so need more loop inductance switch.
On the other hand, information products are handled with how H.D direction towards two-forty and are developed now, yet when processing speed is fast more, the easy more phenomenon of supervening electromagnetic interference (EMI).Usually in the specific occasion of using digiboard, often be accompanied by the existence of out of Memory digital product arround it, therefore traditional digiboard is subject to the interference of external electromagnetic field, thereby easily produces erroneous judgement.Required have for the large-area digiboard for commercial, the quantity of its antenna arrangement increases thereupon, and this certainly will increase a large amount of duplexers.The restriction that this causes the board area downsizing of handwriting pad causes being difficult to make the panel with undersized borderline region.In view of this, the present inventor provides a kind of EM induction system and coordinate setting program thereof with wireless-no battery pointing device (cord less-battery lesspointer apparatus) and loop inductance layout (inductive loop), and it is configured according to a loop inductance allocation list.Loop inductance layout in the loop inductance allocation list comprises a plurality of entity loop inductances (physical inductiveloop), a plurality of entity loop inductances distribute along the X-axis and the Y direction of two-dimensional quadrature coordinate (two-dimensionalorthogonal coordinates) respectively, wherein, each entity loop inductance comprises a plurality of logic loop inductances at least.For each entity loop inductance according to equidirectional distribution, the logic loop inductance adjacent with each logic loop inductance both sides belongs to different entity loop inductances respectively.In addition, the scanning sequency of loop inductance is by a loop inductance allocation list P-SCAN that designs in microprocessor.At first, each loop inductance switch will be opened its entity loop inductance according to the time-division preface, so that the emission electromagnetic signal.When wireless-when no battery pointing device was positioned at the scope of loop inductance, wireless-no battery pointing device was by the mode receiving entity loop inductance institute electromagnetic energy emitted of electromagnetic induction.After wireless-no battery pointing device received energy and energy storage, the circuit switching of entity loop inductance stops emitted energy and begins to receive wireless-energy that no battery pointing device is launched.On the other hand, the coordinate setting program of the no battery pointing device of EM induction system comprises the universe scanning and the sector scanning program thereof of directions X and Y direction, have the 3rd signal that time secondary signal and of big voltage has the third-largest voltage so that detect first signal, with maximum voltage in regular turn, and draw the coordinate position of accurate no battery pointing device via the calculating of processing of EM induction system internal circuit and microprocessor.
In addition, on transmission of the signal between control figure plate system (digital tablet) and wireless-no battery pointing device (cord-less battery-less pointer device) and receiving circuit, in prior art, diverse ways is also arranged.One of them " position detection system (Position Detecting Apparatus) " as shown in Figure 1, it is the U.S. the 004th, 878, No. 553 patents, the two ends of its circuit coil (loop coil) use two each other analog selection switches to connect, to be used for the transmission/reception of control signal respectively; Also must use simultaneously two other simulation synchro switch, in order to connect transfer circuit and receiving circuit, so that make circuit coil carry out the action of transmission/reception.Therefore its every execution once transmission or during received signal, must use the connection of 4 analog selection switches and just can finish.Because each analog selection switch all has conduction impedance (" ON " impedance) to exist, therefore, when the analog selection switch that uses the more the time, just represent that the resistance value of being connected is just higher, also therefore when transmitting or receive, can on series impedance, produce the consumption of too much power, and make that sending out/receive the signal of coming in diminishes, especially very person, can cause wireless-no battery pointing device can't in some cycles, finish the storage of energy, and can't send out enough electromagnetic energies, the problem that causes the digiboard system to operate.In addition, the traditional analog switch is when carrying out conducting (on)/open circuit (off) and move, because of its response time longer, so when the analog switch of series connection the more the time, except meeting makes transmission/received signal produce the delay, is restricted, so the processing speed of large-area digiboard system is exerted an influence in the reaction time of digiboard system; Simultaneously, this circuit also can only transmit signal by uniaxially, and so-called " unidirectional " is meant that the direction that signal flows is single in circuit coil, so it still has the space of improvement on the application benefit of delivering power.
In addition, using the shortcoming that is produced on the analog selection switch in order to improve above-mentioned United States Patent (USP), thereby in the U.S. the 005th, 330, on No. 210 patents, both abandoned using the analog selection switch, and use ternary assembly (three state elements) instead with logic module function, its purpose has when utilizing the logic module conducting to the characteristic of answering speed fast (high speed response) and Low ESR (low impedance), power benefit when improving transmission/reception is to improve the signal attenuation that too much analog selection switch caused and the problem of response speed.Yet the tristate logic (TSL) assembly also only can the uniaxially conducting, and therefore when carrying out transmissions/receptions, must use different logic modules and different paths could be carried out, thereby can make circuit complicated, and causes problems such as noise rising and cost rising.
Summary of the invention
By preceding described, circuit coil in the relevant digiboard system and control circuit still have amendatory space on the power application of transmission/reception.Cause between digiboard system and wireless-no battery pointing device in order to improve control circuit, the power consumption problem that when transmission/reception, is caused, the invention provides a kind of multichannel switch combination circuit and replace employed traditional analog switch of prior art and ternary assembly with the manufacture of semiconductor manufacturing, in order to transmission/reception selector switch as the loop inductance of digiboard, but except simplified control circuit, also can improve the power benefit of the transmission/received signal between digiboard system and wireless-no battery pointing device, noise when reducing transmission/reception and the functions such as response speed that improve the transmission/received signal between digiboard system and wireless-no battery pointing device.
One of fundamental purpose of the present invention provides a kind of with the digiboard system of multichannel switch combination circuit control loop inductance and the system of the signal transmission/reception between wireless-no battery pointing device, in order to the circuit switching of conduct control loop inductance and the transmission/reception selector switch of digiboard loop inductance, except the circuit that can simplify the control loop inductance, and the power benefit can effectively improve signal transmission/reception between loop inductance and wireless-no battery pointing device the time.
Another fundamental purpose of the present invention provides a kind of with the digiboard system of multichannel switch combination circuit control loop inductance and the signal transmission/method of reseptance between wireless-no battery pointing device, its use one has the IC of multichannel switching function, be used as the loop of digiboard system during transmission/received signal and select circuit, therefore, each channel switch promptly is a circuit switching.During transmitting signal, can select a specific channel by channel selector, so that a specific circuit switching can conducting and form the loop inductance of a sealing, make the digiboard system that the power supply of transmission electromagnetic energy can be provided a loop inductance that is connected with the conducting channel.During received signal, then also can be by the selection of channel selector, and make a specific circuit switching to be switched on, yet this channel that is switched on may with transmit signal during the channel of institute's conducting different, wireless in order to receive-another signal that no battery pointing device is transmitted.
The present invention also has a fundamental purpose, provide a kind of digiboard system with multichannel switch combination circuit control loop inductance, in order to transmission/reception selector switch as the loop inductance of digiboard, except controlling the circuit of loop inductance in order to simplification, power benefit in the time of also can further improving the signal transmission/reception between loop inductance and wireless-no battery pointing device, and the signal noise ratio that promotes the digiboard system.
Another fundamental purpose of the present invention provides the digiboard system that a kind of switch is controlled loop inductance, and it uses a multichannel switch, is used as the control circuit of digiboard system during transmission/received signal.During the transmission of transmission/received signal, can select a specific channel by channel selector, so that a corresponding particular channel can conducting during transmitting, therefore digiboard system and loop inductance are during transmitting, can form the loop of a sealing, thereby can provide the power supply that transmits electromagnetic energy a loop inductance that is connected with the conducting channel.During received signal, then also can be by the selection of channel selector, and make that a corresponding particular channel all can conducting at reception period, yet this channel that is switched on may with transmit signal during the channel of institute's conducting different, wireless in order to receive-another signal that no battery pointing device is transmitted.In addition, during received signal, have a specific power switch and keep the state of ground connection (grounding), so that the reference potential of received signal remains on zero position standard.
The present invention proposes a kind of have method that the supply of loop inductance bi-directional power is provided and the digiboard system that controls the signal transmission/reception between loop inductance and wireless-no battery pointing device with multichannel switch combination circuit, comprise: a wireless-no battery pointing device, receive first electromagnetic signal that a loop inductance is transmitted, and by the electromagnetic induction store electrical energy, so that launch one second electromagnetic signal.One multichannel switch combination circuit, it is connected electrically with a microprocessor, an amplifier circuit and loop inductance, in the cycle, to select a specific loop inductance in the sequential of transmission/reception to carry out the function of this first electromagnetic signal of transmission/reception/second electromagnetic signal as the digiboard system.This multichannel switch combination circuit further comprises: a two-way power switch and control circuit combination, and it is controlled the conducting or the open circuit of power switch by a transmission/reception sequential and a power supply suppling signal sequential; One channel selector, it is connected electrically with a microprocessor, and in transmission/time of reception interval, according to scanning (channel selection) signal that microprocessor sent, the channel that conducting in regular turn is specific and through loop inductance transmission/received signal; And a channel switch combination, it is connected electrically with loop inductance, and according to the signal of channel selector, seeks out a corresponding channel, and make this channel and power switch/amplifier circuit electric connection.The combination of one loop inductance, the one end is connected electrically with the channel switch combination respectively, the other end then is connected electrically with a bi-directional power switch and an amplifier circuit, so that in the time interval that transmits signal, can form a loop and transmit first electromagnetic signal, simultaneously in the time interval of received signal, receive wireless-second electromagnetic signal that no battery pointing device is launched.One amplifier circuit, it is connected electrically with multichannel switch combination circuit, has the function of second electromagnetic signal amplification that will receive.One position signalling change-over circuit, it is connected electrically with an amplifying circuit and an analog/digital converter, has the function that this amplification received signal is changed.One pressure signal change-over circuit, it is connected electrically with an amplifying circuit and an analog/digital converter, has amplifying the function that received signal is changed.One analog/digital converter, it is connected electrically with position signalling change-over circuit and pressure signal change-over circuit, has the function that the analog signal conversion that position signalling change-over circuit and pressure signal change-over circuit are changed becomes digital signal.One microprocessor, it is connected electrically with multichannel switch combination circuit and analog/digital converter, and provide the sequential of control transmission/reception and power supply suppling signal, and function with scanning of providing (channel selection) signal, according to the digital signal that analog/digital converter provided, carry out wireless-no battery pointing device Coordinate Calculation simultaneously.
The present invention further provides a kind of have method that the supply of loop inductance bi-directional power is provided and transmission and the method for reseptance of controlling the digiboard system of loop inductance and wireless-no battery pointing device with multichannel switch combination circuit, this transmission and method of reseptance comprise: at first, during transmitting signal, provide one to transmit the transmission that control signal is come start signal, with embodiment promptly is to be in the transmission signal sequence of noble potential " 1 " and a power supply suppling signal is provided, in the sequential of the noble potential " 1 " in first cycle of power supply suppling signal, specific two switches in turn-on power switch and the control circuit combination (all the other two switches are open circuit), and make this two switch be connected to a power supply and an earth point respectively, so will make loop inductance one be connected to power supply and the other end is connected to earth point; And synchronously provide one scan signal (being channel selecting signal) to channel selector by this microprocessor, go out specific channel and this specific channel of conducting with corresponding, this will make loop inductance constitute a loop, and this power supply is fed to this loop inductance; Secondly, equally in transmitting signal sequence, in the sequential of the electronegative potential " 0 " in power supply suppling signal first cycle of sequential, other specific two switches in turn-on power switch and the control circuit combination are (same, two switches are open circuit in addition), and make this two switch be connected to an earth point and a power supply respectively, so will make loop inductance one be connected to earth point and the other end is connected to power supply, therefore in the noble potential sequential and electronegative potential sequential of power supply suppling signal sequential, the electric current side in loop inductance mutually will be opposite; Wherein, the frequency of power supply suppling signal is the resonant frequency of pointing device resonant circuit no better than, so just can induce maximum signal; In the sequential that transmits signal, provide amplifier activation/decapacitation signal so that amplifier circuit is in the state of decapacitation; Then, according to this cycle of the power supply suppling signal in the delivery time interval, repeat.During received signal, provide one to receive the reception that control signal is come start signal, with embodiment promptly is the received signal sequential that is in electronegative potential " 0 ", an and power supply supply control signal is provided, so that the switch that electrically connects of the contact state that remains on ground connection together in the combination of power switch and control circuit; And synchronously provide one scan signal (being channel selecting signal) to this channel selector by this microprocessor, go out specific channel and this specific channel of conducting with corresponding, this will constitute a loop with loop inductance, one wireless to receive-this electromagnetic signal that no battery pointing device is launched.
Description of drawings
Figure 1 shows that the circuit diagram of prior art;
Figure 2 shows that the circuit diagram of another prior art;
Figure 3 shows that according to the circuit diagram in the specific embodiment of the invention;
Fig. 4 a is depicted as according to the power supply suppling signal synoptic diagram in the embodiment of the invention;
Fig. 4 b is depicted as according to the transmission in the embodiment of the invention/reception control signal synoptic diagram, and wherein Tx is for during transmitting, and Rx is a reception period;
Fig. 4 c is depicted as according to the activation of the amplifier in the embodiment of the invention/decapacitation control signal synoptic diagram;
Circuit diagram in Figure 5 shows that according to a preferred embodiment of the present invention.
Symbol description among the figure
A transmission/reception control signal contact
B power supply supply control signal contact
C amplifier activation/decapacitation control signal contact
10 wireless-no battery pointing devices
20 multichannel switch combination circuit
210 bi-directional power switch and control circuit combination
211 power switches
212 power switches
213 power switches
214 power switches
The 215a reverser
The 215b reverser
The 215c reverser
216 AND logic locks
216a AND logic lock
216b AND logic lock
216c AND logic lock
21 power switches and control circuit combination
22 channel selectors
The combination of 23 channel switch
30 amplifier circuits
40 position signalling change-over circuits
50 pressure signal change-over circuits
60 analog/digital converters
70 microprocessors
80 loop inductances
Embodiment
The present invention this direction of inquiring into be a kind of digiboard system with switch control loop inductance and wireless-no battery pointing device with and the method for signal transmission/reception.In order to understand the present invention up hill and dale, the detailed circuit structure and the transmission/receiving step of signal will be proposed in following description.Yet, to traditional digiboard system and loop inductance part be not described in the follow-up detailed description, with the restriction of avoiding causing the present invention unnecessary.Preferred embodiment meeting of the present invention is described in detail as follows, and except these were described in detail, the present invention can also implement in other embodiments widely, so protection scope of the present invention is as the criterion with claims.
The present invention at first proposes a kind of digiboard system with the signal transmission/reception between multichannel switch combination circuit control loop inductance and wireless-no battery pointing device, comprise: a wireless-no battery pointing device, can receive first electromagnetic signal that a loop inductance is transmitted, and by the electromagnetic induction store electrical energy so that launch one second electromagnetic signal.One multichannel switch combination circuit, it is connected electrically with a microprocessor, an amplifier circuit and this loop inductance, with as the digiboard system in the sequential of transmission/reception in the cycle, select a specific loop inductance to carry out the function of this first electromagnetic signal of transmission/reception and this second electromagnetic signal, this multichannel switch combination circuit further comprises: a power switch and control circuit combination, and it is come the conducting or the open circuit of gauge tap by a transmission/received signal and a power supply suppling signal; One channel selector, it is connected electrically with microprocessor, and in the transmission/time of reception interval of digiboard system, according to the sweep signal (being channel selecting signal) that microprocessor sent, the channel that conducting in regular turn is specific and through loop inductance transmission/received signal; And a channel switch combination, it is connected electrically with the loop inductance combination, and according to the signal of channel selector, seeks out a corresponding channel, and this channel and power switch and control circuit are made up and amplifier circuit formation electric connection.The combination of one loop inductance, the one end is connected electrically with the channel switch combination respectively, the other end then is connected electrically with contact altogether, so that in the time interval that transmits signal, can form a loop and transmit first electromagnetic signal, simultaneously in the time interval of received signal, receive wireless-second electromagnetic signal that no battery pointing device is launched.One amplifier circuit, it is connected electrically with multichannel switch combination circuit, has the function of second electromagnetic signal amplification that will receive.One position signalling change-over circuit, it is connected electrically with amplifying circuit and analog/digital converter, has the function that amplifying signal is converted to the signal with position message.One pressure signal change-over circuit, it is connected electrically with amplifying circuit and analog/digital converter, has the function that amplifying signal is converted to the signal with pressure message.One analog/digital converter, it is connected electrically with position signalling change-over circuit and pressure signal change-over circuit, has the function that the analog signal conversion that this position signalling change-over circuit and this pressure signal change-over circuit are changed becomes digital signal.One microprocessor, it is connected electrically with this multichannel switch combination circuit and analog/digital converter, and the signal that can provide control transmission/reception and power supply to supply, and function with the sweep signal of providing (being channel selecting signal), according to the digital signal that analog/digital converter provided, carry out the calculating of wireless-no battery pointing device position simultaneously.
The present invention then proposes a kind of transmission and method of reseptance of controlling the digiboard system of loop inductance and wireless-no battery pointing device with multichannel switch combination circuit, this transmission and method of reseptance comprise: at first, during transmitting signal, provide a transmission/reception control signal to come the transmission of start signal, with embodiment promptly is to be in the transmission signal sequence of noble potential " 1 " and a power supply suppling signal is provided, in the sequential of the noble potential " 1 " in first cycle of power supply suppling signal, switch in turn-on power switch and the control circuit combination, and make this switch be connected to a power supply.Simultaneously during transmitting signal, provide one scan signal (being channel selecting signal) to channel selector by this microprocessor, go out specific channel and this specific channel of conducting with corresponding, this will make loop inductance constitute a loop, and this power supply is fed to this loop inductance; Secondly, equally in transmitting signal sequence, and when the sequential of the power supply suppling signal electronegative potential in first cycle of sequential " 0 ", make the switch in the combination of power switch and control circuit be in the state of open circuit; In the sequential that transmits signal, also provide amplifier activation/decapacitation signal so that amplifier circuit is in the state of decapacitation; Then, according to this cycle of the power supply suppling signal in the delivery time interval, repeat.During received signal, the sequential that provides a received signal sequential and that is in electronegative potential " 0 " to be in the power supply suppling signal noble potential in first cycle of sequential " 1 " is so that the switch in power switch and the control circuit combination keeps the state of open circuit; Then, in the received signal sequential of electronegative potential " 0 " and in the power supply supply sequential of the power supply suppling signal electronegative potential in first cycle of sequential " 0 ", the state that the switch maintenance still in the combination of power switch and control circuit is opened a way; During received signal, provide one scan (channel selection) signal to channel selector by microprocessor, go out specific channel and this specific channel of conducting with corresponding; And receive that this is wireless-this electromagnetic signal that no battery pointing device is launched.
The present invention reintroduces a kind of digiboard system with multichannel switch combination circuit that loop inductance bi-directional power supply is provided with the signal transmission/reception between control loop inductance and wireless-no battery pointing device, comprise: a wireless-no battery pointing device, can receive first electromagnetic signal that a loop inductance is transmitted, and by the electromagnetic induction store electrical energy so that launch one second electromagnetic signal.One multichannel switch combination circuit, it is connected electrically with a microprocessor, an amplifier circuit and this loop inductance, with as the digiboard system in the sequential of transmission/reception in the cycle, select this specific loop inductance to carry out the function of this first electromagnetic signal of transmission/reception and this second electromagnetic signal, this multichannel switch combination circuit further comprises: a two-way power switch and control circuit combination, and it comes the conducting of gauge tap by a transmission/received signal and a power supply suppling signal or closes; One channel selector, it is connected electrically with microprocessor, and in the transmission/time of reception interval of digiboard system, according to the sweep signal (being channel selecting signal) that microprocessor sent, the channel that conducting in regular turn is specific and through loop inductance transmission/received signal; And a channel switch combination, it is connected electrically with loop inductance, and according to the signal of channel selector, seeks out a corresponding channel, and channel and bi-directional power switch and control circuit are made up and amplifier circuit formation electric connection.The combination of one loop inductance, the one end is connected electrically with the channel switch combination respectively, the other end then is connected electrically with bi-directional power switch and amplifier circuit, so that in the time interval that transmits signal, can form a loop and transmit first electromagnetic signal, simultaneously in the time interval of received signal, receive wireless-second electromagnetic signal that no battery pointing device is launched.One amplifier circuit, it is connected electrically with multichannel switch combination circuit, has the function of second electromagnetic signal amplification that will receive.One position signalling change-over circuit, it is connected electrically with amplifying circuit and analog/digital converter, has the function that amplifying signal is converted to the signal with position message.One pressure signal change-over circuit, it is connected electrically with amplifying circuit and analog/digital converter, has the function that amplifying signal is converted to the signal with pressure message.One analog/digital converter, it is connected electrically with this position signalling change-over circuit and this pressure signal change-over circuit, has the function that the analog signal conversion that this position signalling change-over circuit and this pressure signal change-over circuit are changed becomes digital signal.One microprocessor, it is connected electrically with multichannel switch combination circuit and analog/digital converter, and the signal that can provide this transmission/reception of control and power supply to supply, and function with the sweep signal of providing (being channel selecting signal), according to the digital signal that analog/digital converter provided, carry out the calculating of wireless-no battery pointing device position simultaneously.
The present invention then reintroduces a kind of transmission and method of reseptance with digiboard system of the Supply Method that the multichannel switch combination of loop inductance bi-directional power supply circuit control loop inductance is provided and the loop inductance bi-directional power is provided and wireless-no battery pointing device, this transmission and method of reseptance comprise: at first, during transmitting signal, provide a transmission/reception control signal to come the transmission of start signal, with embodiment promptly is to be in the transmission signal sequence of noble potential " 1 " and a power supply suppling signal is provided, in the sequential of the noble potential " 1 " in first cycle of power supply suppling signal, specific two switches in turn-on power switch and the control circuit combination, and make this two switch be connected to a power supply and an earth point respectively, so will make loop inductance one be connected to power supply and the other end is connected to earth point; And synchronously provide one scan signal (being channel selecting signal) to channel selector by microprocessor, go out specific channel and this specific channel of conducting with corresponding, this will make loop inductance constitute a loop, and power supply is fed to loop inductance; Secondly, equally in transmitting signal sequence, other specific two switches in the sequential of the electronegative potential " 0 " in power supply suppling signal first cycle of sequential in the combination of turn-on power switch and control circuit, and make this two switch be connected to an earth point and a power supply respectively, so will make loop inductance one be connected to earth point and the other end is connected to power supply, therefore in noble potential sequential and electronegative potential sequential, the electric current side in loop inductance mutually will be opposite; Wherein, the frequency of power supply suppling signal is the resonant frequency of pointing device resonant circuit no better than, so just can induce maximum signal; In the sequential that transmits signal, also provide amplifier activation/decapacitation signal so that amplifier circuit is in the state of decapacitation; Then, according to this cycle of the power supply suppling signal in the delivery time interval, repeat.During received signal, provide a transmission/reception control signal to come the reception of start signal, with embodiment promptly is the received signal sequential that is in electronegative potential " 0 ", an and power supply supply control signal is provided, so that the switch that electrically connects of the contact state that remains on ground connection together in the combination of power switch and control circuit; And synchronously provide one scan signal (being channel selecting signal) to this channel selector by this microprocessor, go out specific channel and this specific channel of conducting with corresponding, this will make loop inductance constitute a loop, one wireless to receive-this electromagnetic signal that no battery pointing device is launched.
Next be detailed description of the present invention, and the circuit operation situation of specific embodiments of the invention and preferred embodiment is described by Fig. 3 to Fig. 5.
At first, please refer to Fig. 3.Fig. 3 is the circuit diagram of the specific embodiment of the invention, comprise a wireless-no battery pointing device 10 (cord less-battery less pointer apparatus), it can receive from the loop inductance in the digiboard system (inductive loop) 80 electromagnetic energy of being launched, and after its inner tank circuit store electrical energy, launch another electromagnetic energy.One multichannel switch combination circuit 20 (multi-channel switch sets), it comprises that more one can make up 21 by power switch and the control circuit that transmission/reception sequential is controlled; One channel selector (channel selector) 22, it is that the digiboard system is in transmission/time of reception interval, can be according to the universe sweep signal (being the universe channel selecting signal) that microprocessor sent, conducting in regular turn and through loop inductance transmission/received signal, it also can carry out transmission/received signal to some specific channel according to the sector scanning signal (being that regional channel is selected signal) that microprocessor sent in addition; One channel switch combination (channel switches) 23, it seeks out a corresponding switch according to the signal of channel selector 22, and makes this switch form conducting state.One loop inductance combination 80, the one end is connected electrically with channel switch combination 23 respectively, the other end then is connected to contact altogether, so that in the time interval that transmits signal, form a loop and can transmit electromagnetic energy, also can in the time interval of received signal, form a loop and receive wireless-10 electromagnetic energy emitted of no battery pointing device simultaneously.One amplifier circuit 30, it has the function that received signal is amplified, and its activation/decapacitation state system controls by amplifier activation/decapacitation control signal, and the control timing of this signal and transmission/reception control signal is similar.One position signalling change-over circuit 40, its received signal to this amplification is changed.One pressure signal change-over circuit 50, its received signal to this amplification is changed.One analog/digital converter 60, its analog signal conversion that this position signalling change-over circuit and this pressure signal change-over circuit are exported becomes digital signal.One microprocessor 70, it is in order to the time sequential pulse of control transmission/reception and power supply supply, and sweep signal (being channel selecting signal) is provided,, carries out the calculating of wireless-no battery pointing device position simultaneously according to the digital signal that analog/digital converter provided.
Then, please refer to Fig. 4.Suppose digiboard system (serial vein dashes and is in noble potential " 1 " in real time) during transmitting signal, shown in Fig. 4 a and Fig. 4 b, when power supply suppling signal " B " is in the noble potential in first cycle (" 1 "), then the switch 211 in power switch among Fig. 3 and the control circuit combination 21 can form the state of conducting (close), at this moment, power switch and control circuit combination 21 can provide a power supply (VCC) to loop inductance; And when power supply suppling signal " B " is in the electronegative potential in first cycle (" 0 "), then the switch in the power on-off control circuit among Fig. 3 21 211 can keep the state of open circuit (open), at this moment, 21 of power on-off control circuits can't provide a power supply (VCC) to loop inductance.Then, the power supply suppling signal " B " in the delivery time interval repeats according to this, and wherein, the frequency of this power supply suppling signal B is the resonant frequency of pointing device resonant circuit 10 no better than, so just can induce maximum signal; Be depicted as example with Fig. 4 a and Fig. 4 b, it is presented in the time interval of transmission/reception, carry out eight cycles altogether, and these eight cycles is only non-limiting for signal.
In the time interval that is transmitting, shown in Fig. 4 b, it can be according to the sequential of power supply suppling signal " B ", shown in Fig. 4 a, with switch 211 conducting/open circuit in order, before this, microprocessor can transmit sweep signal (channel selecting signal) earlier to channel selector 22, come the specific channel switch of conducting with this, and constitute a loop with the loop inductance that links to each other 80, so that can be via switch 211 and specific channel switch, and power supply (VCC) can be fed on the specific loop inductance 80, so that the loop inductance that the digiboard system can be specific thus transmits electromagnetic signal to adjacent space with power supply (VCC).In addition, in the delivery time interval, because of also having, the input end of amplifier 30 receives the power supply suppling signal, but this is one at interval received signal of delivery time, it is not the signal that will receive on the circuit design of the present invention, disturb for keeping away this unnecessary signal, with the amplifier decapacitation, therefore unnecessary received signal can be isolated by amplifier activation/decapacitation control signal " C ".
Suppose digiboard system (promptly transmission/received signal A is in electronegative potential " 0 ") during received signal, shown in Fig. 4 a and Fig. 4 b, (" 1 ") or electronegative potential (" 0 ") when then no matter the power supply suppling signal is in noble potential, the switch 211 in the power on-off control circuit 21 among Fig. 3 can remain on the state of open circuit (open) always.
In the time interval of received signal because the switch 211 in power switch and the control circuit combination 21 all remains on the state of open circuit (open), so can power supply (VCC) to loop inductance 80.At the same time, because wireless-no battery pointing device 10 can be during aforementioned transmission signal, the induction reception also stores an electromagnetic energy that is transmitted via loop inductance 80, and then launch another electromagnetic energy.Therefore, after each loop inductance 80 is launched the scanning of electromagnetic signal and receiving electromagnetic signals, can seek out a plurality of bigger loop inductances of received signal, this i.e. " universe scanning "; Carry out again afterwards " sector scanning ", it is a plurality of loop inductances that received signal is bigger, with the loop inductance emission electromagnetic signal of induction received signal maximum a plurality of loop inductance receiving electromagnetic signals thus in regular turn again, so that make wireless-no battery pointing device 10 receiving electromagnetic signals and launch another electromagnetic signal again, be sent to amplifier circuit 30 after receiving by loop inductance again to loop inductance.Treat that the digiboard system receives wireless-signal that no battery pointing device 10 is transmitted and after amplifier circuit 30 is handled, can deliver to again in position signalling change-over circuit (position signal converting circuit) 40 and the pressure signal change-over circuit (pressure signal converting circuit) 50, signal after will changing respectively is through other analog/digital converter 60 (analog to digital converter; ADC) convert digital signal to after, deliver in the microprocessor 70, and via coordinate Calculation and judgement, calculate the exact position and the relevant message status of wireless-no battery pointing device 10.
In specific embodiments of the invention, replace analog switch and ternary lock with a multichannel switch combination circuit 20, its objective is that the conduction impedance (" ON " impedance) by (simulation) switch of manufacture of semiconductor manufacturing can be reduced between the 0.25ohm to 10ohm, therefore when switch 211 when the delivery time, the interval was switched on, can be with power supply (VCC) directly through analog switch 211 and channel switch combination 23, and electric current is sent on the loop inductance 80, in order to launch an electromagnetic energy.Because the conduction impedance of the switch 211 in the multichannel switch combination circuit 20 is very little with respect to the analog switch conduction impedance of prior art, therefore the voltage drop (voltage drop) that is produced on conduction impedance is just relative little, so the voltage of major part all can be delivered to loop inductance 80, the feasible power benefit that is transmitted is than the analog switching circuit height of prior art.In addition, in the configuration of circuit, also simple and save the space than prior art.The number of the channel switch combination 23 in the specific embodiment of the invention does not limit simultaneously, but determines according to the size of digiboard and the design of loop inductance 80.
Because the digiboard system described in the specific embodiment of the invention, though the power benefit in the time of can promoting transmission/reception, simplify power switch and control circuit combination and reduce the shared advantages such as space of circuit, but on power supply suppling signal time sequence control, then only having can be with power supply (VCC) conducting to loop inductance 80, in order to transmit electromagnetic signal at noble potential.Therefore, for the power that improves the digiboard system transmits benefit, the present invention further reintroduces a preferred embodiment, it is that power switch in the aforementioned specific embodiment and control circuit combination 21 are improved, so that it is during the transmission signal, all can select a specific channel by channel selector 22 with selection function, so that some specific power switch 211～214 all can provide power supply to specific loop inductance during the noble potential of power supply suppling signal and electronegative potential, therefore the specific loop inductance of digiboard system is during the noble potential and electronegative potential of power supply suppling signal, all can form the loop of a sealing, but its direction of current during noble potential and electronegative potential is opposite, thereby can provide stronger electromagnetic energy power supply (detailed circuit will illustrate) among subsequent figure 5 to a specific loop inductance 80.During received signal, then also can be by the selection of channel selector 22, and make and can be switched on during this received signal corresponding to one of channel selector 22 specific channel 23, wireless in order to receive-another signal that no battery pointing device 10 is transmitted.Yet this channel that is switched on 23 may be different with the channel of institute's conducting during the transmission signal.In addition, during received signal, all have a specific power switch and keep the state of ground connection (grounding), so that this specific loop inductance forms loop.
Fig. 5 is the circuit diagram of preferred embodiment of the present invention, because the switch (211,212,213,214) in power switch among Fig. 5 and the control circuit combination 210, in the time interval that transmits (promptly transmission/received signal sequential is in noble potential " 1 "), when it is noble potential " 1 " and electronegative potential " 0 " at the power supply suppling signal, current polarity in its formed loop can be opposite, therefore, the combination of employed power switch and control circuit can be described as bi-directional power switch and control circuit combination 210 in the specific embodiment of the invention.
In addition, in the circuit diagram of embodiment circuit diagram shown in Figure 3 and preferred embodiment shown in Figure 5, except power switch and control circuit combination (promptly 21 and 210) is different, all the other each circuit functions partly are all identical, therefore the circuit function shown in relevant the present invention preferred embodiment shown in Figure 5, no longer be repeated in this description, only the bi-directional power switch control circuit 210 after the improvement done detailed explanation, to simplify tediously long repeat specification.
Suppose that the digiboard system is during transmitting signal (promptly transmission/received signal sequential is in noble potential " 1 "), shown in Fig. 4 a and Fig. 4 b, when power supply suppling signal sequential is in the noble potential " 1 " in first cycle, then 211 and 213 switches in power switch among Fig. 5 and the control circuit combination 210 can form the state of conducting (close), at this moment, switch 211 can connect a power supply (VCC), and switch 213 then can form ground connection; Yet two other switch 212 and 214 all remains on open circuit (open) state.Then, when power supply suppling signal sequential is in the electronegative potential " 0 " in first cycle, switch 211 and the 213 liang switch state that can keep open circuit (open) of bi-directional power switch among Fig. 5 and control circuit combination in 210 then, 212 and 214 liang of switches then can form the state of conducting (close), at this moment, switch 212 can form ground connection, and switch 214 then can connect a power supply (VCC).Then, according to this cycle of the power supply suppling signal sequential in the delivery time interval, repeat.From the above mentioned, the bi-directional power switch control circuit 210 in preferred embodiment of the present invention, no matter it be at the noble potential of power supply suppling signal sequential or be in the electronegative potential, the switch that is switched on is connected with a power supply (VCC) and an earth point.
Be depicted as example with Fig. 4 a and Fig. 4 b equally, in the time interval of transmission/reception, carry out eight cycles altogether, and these eight cycles be only non-limiting for signal.
In the time interval that is transmitting signal, microprocessor can be sent scanning (channel selection) signal, select the corresponding switch of conducting via channel selector 22 in regular turn, therefore can constitute a loop with the loop inductance 80 that links to each other, so that power supply (VCC) is made up 210 and one corresponding switch conduction to loop inductance 80 via bi-directional power switch and control circuit, and makes the digiboard system can transmit electromagnetic signal to adjacent space.For instance, during the digiboard system is transmitting signal (promptly transmission/received signal sequential is in noble potential " 1 "), and power supply supply sequential is when being in the noble potential " 1 " in first cycle, then 211 and 213 switches in bi-directional power switch among Fig. 5 and the control circuit combination 210 can form the state of conducting (close), at this moment, switch 211 can connect a power supply (VCC), switch 213 then can form ground connection, therefore direction of current be by switch 211 through loop inductance to switch 213, so switch 211 and switch 213 and loop inductance will constitute a loop.
Then, when power supply supply sequential is in the electronegative potential " 0 " in first cycle, switch 211 and the 213 liang switch state that can keep open circuit (open) of bi-directional power switch among Fig. 5 and control circuit combination in 210 then, 212 and 214 liang of switches then can form the state of conducting (close), at this moment, switch 212 can form ground connection, switch 214 then can connect a power supply (VCC), therefore direction of current be by switch 214 through loop inductance to switch 212, so switch 212 and switch 214 and loop inductance will constitute a loop.Then, according to this cycle of the power supply suppling signal sequential in the delivery time interval, repeat.From the above mentioned, bi-directional power switch in preferred embodiment of the present invention and control circuit combination 210, no matter it is in the noble potential or electronegative potential of power supply suppling signal sequential, all can constitute a loop with loop inductance 80, this moment, the polarity of formed loop was opposite, therefore no matter at the noble potential of power supply suppling signal sequential or electronegative potential in the cycle, digiboard of the present invention system all can transmit electromagnetic signal to adjacent space, so can obtain bigger delivering power.Yet, disturb for avoiding producing unnecessary signal, same, microprocessor also can be sent amplifier activation/decapacitation control signal concomitantly, shown in Fig. 4 c, so that the digiboard system is during transmitting signal, amplifier circuit 30 can be in the state of be failure to actuate (disable), so that the isolation of received signal that will be unnecessary.
Suppose digiboard system (being that signal sequence is in electronegative potential " 0 ") during received signal, shown in Fig. 4 a and Fig. 4 b, when power supply suppling signal sequential is in the noble potential (i.e. " 1 ") in first cycle, then the switch 211,212 and 214 of bi-directional power switch among Fig. 5 and control circuit combination in 210 can remain on the state of open circuit (open), only switch 213 conductings (close) and be connected with earth point; And when power supply suppling signal sequential is in the electronegative potential (i.e. " 0 ") in first cycle, then in bi-directional power switch among Fig. 5 and the control circuit combination 210, still to have only switch 213 are conductings (close) and be connected with earth point, and switch 211,212 and 214 states that still can keep open circuit (open), then, the cycle of the power supply suppling signal sequential in the same interval of time of reception according to this, repeat, that is, receive wireless-during 10 electromagnetic energy emitted of no battery pointing device, switch 213 in the cycle, all keeps the state of ground connection at the noble potential of power supply suppling signal sequential and electronegative potential.
Because wireless-no battery pointing device 10 is during aforementioned transmission signal, responds to and receive an electromagnetic energy that is transmitted via loop inductance 80, and can after finishing energy storage, launch another electromagnetic energy.As shown in Figure 5, after loop inductance 80 being carried out universe scanning, can seek out a plurality of bigger loop inductances of received signal, therefore a plurality of loop inductances that can be again that received signal is bigger carry out sector scanning, so that wireless-electromagnetic signal that no battery pointing device 10 is launched can be received through the induction of a plurality of loop inductances thus, be sent to amplifier circuit 30 according to the time-division preface.Treat that the digiboard system receives wireless-signal that no battery pointing device 10 is transmitted and after amplifier circuit 30 is handled, can deliver to again in position signalling change-over circuit (position signal converting circuit) 40 and the pressure signal change-over circuit (pressuresignal converting circuit) 50, respectively with induced signal, through other analog/digital converter 60 (analog to digital converter; ADC) convert digital signal to after, deliver in the microprocessor 70, and via coordinate Calculation and judgement, calculate the exact position and the relevant message status of wireless-no battery pointing device 10.
In preferred embodiment of the present invention, be to replace analog switch and ternary lock equally with a multichannel switch combination circuit 20, its objective is that the conduction impedance by (simulation) switch of manufacture of semiconductor manufacturing can reduce, therefore when bi-directional power switch 210 when the delivery time, the interval was switched on, can form a closed path with loop inductance, so power supply (VCC) directly can be made up 23 through the channel switch that is switched on, and electric current is sent on the loop inductance 80, to launch an electromagnetic energy.Because the switch conduction impedance phase in the multichannel switch combination circuit 20 is very little for traditional analog switch impedance, therefore the voltage drop that is produced on conduction impedance is just relative little, so the voltage of major part all can be delivered to loop inductance 80, add at the noble potential of power supply supply sequential and electronegative potential in the cycle, loop inductance 80 all can transmit electromagnetic signal, so the feasible more traditional analog switching circuit height of power benefit that is transmitted.In addition, in the configuration of circuit, also simple and save the space than prior art.The number of the channel switch combination 23 in the specific embodiment of the invention does not limit simultaneously, but determines according to the size of digiboard and the design of loop inductance 80.
As mentioned above, in preferred embodiment of the present invention, digiboard system that a kind of switch with two-way transmission/receiving function controls loop inductance and the signal transmission/method of reseptance between wireless-no battery pointing device are provided, its use one has the multichannel switch combination circuit 20 of two-way transmission/receiving function, is used as the control circuit of the power supply supply of digiboard system during transmission/received signal.During the transmission signal, all can select a specific channel by channel selector 22 with selection function, so that all can conducting when noble potential and the electronegative potential corresponding to a particular channel switch 23 of channel selector, therefore the digiboard system is at noble potential and during electronegative potential week, all can form the loop inductance of a sealing, thereby can provide the power supply that transmits electromagnetic energy a loop inductance that is connected with the conducting channel.During received signal, also can be, and make and can be switched on corresponding to one of channel selector 22 specific channel switch 23 by the selection of channel selector 22, wireless in order to receive-another signal that no battery pointing device is transmitted.Yet this channel that is switched on may be different with the channel of institute's conducting during the transmission signal.In addition, during received signal, have a specific power switch and keep the state of ground connection (grounding), so that the reference potential of received signal remains on zero position standard.As above-mentioned improved results, the present invention can meet economically benefit and the usability on the industry.
Certainly, the present invention also may be used in the coordinate location method of any loop inductance except on the loop inductance that may be applied in the EM induction system with no battery pointing device.Apparently, according to the description among the top embodiment, the present invention has many corrections and difference.Therefore need be understood in the scope of claims, except above-mentioned detailed description, the present invention can also implement widely in other embodiments.
Above-mentioned is preferred embodiment of the present invention only, is not in order to limit protection scope of the present invention; All other do not break away from the equivalence of being finished under the disclosed spirit and changes or modification, all should be included in the scope of claims.
Claims (10)
1. the digiboard system with the signal transmission/reception between multichannel switch combination circuit control loop inductance and wireless-no battery pointing device is characterized in that, comprises:
One wireless-no battery pointing device receives one first electromagnetic signal that a loop inductance is transmitted, and by the electromagnetic induction store electrical energy so that launch one second electromagnetic signal;
One multichannel switch combination circuit, it is connected electrically with a microprocessor, an amplifier circuit and this loop inductance, with as a digiboard system in the sequential of transmission/reception in the cycle, select this specific loop inductance to carry out the function of this first electromagnetic signal of transmission/reception and this second electromagnetic signal, this multichannel switch combination circuit further comprises:
One power switch and control circuit combination, it is controlled the conducting or the open circuit of a power switch by a transmission/reception sequential and a power supply suppling signal sequential;
One channel selector, it is connected electrically with this microprocessor, and in this transmission/time of reception interval of this digiboard system, according to scanning (channel selection) signal that this microprocessor sent, the channel that conducting in regular turn is specific and through this loop inductance transmission/received signal;
One channel switch combination, it is connected electrically with this loop inductance, and according to the signal of this channel selector, seeks out a corresponding particular channel, and make this particular channel and this power switch and the electric connection of control circuit combination/amplifier circuit; And
The combination of one loop inductance, the one end is connected electrically with this channel switch combination respectively, the other end then is connected electrically with contact altogether, so that in the time interval that transmits signal, can form a loop and transmit this first electromagnetic signal, simultaneously in the time interval of received signal, receive that this is wireless-this second electromagnetic signal that no battery pointing device is launched;
One amplifier circuit, it is connected electrically with this multichannel switch combination circuit, has the function that this second electromagnetic signal that receives is amplified;
One position signalling change-over circuit, it is connected electrically with this amplifying circuit and an analog/digital converter, has the function that this amplifying signal is converted to the signal with position message;
One pressure signal change-over circuit, it is connected electrically with this amplifying circuit and an analog/digital converter, has the function that this amplifying signal is converted to the signal with pressure message;
One analog/digital converter, it is connected electrically with this position signalling change-over circuit and this pressure signal change-over circuit, has the function that the analog signal conversion that this position signalling change-over circuit and this pressure signal change-over circuit are changed becomes digital signal;
One microprocessor, it is connected electrically with this multichannel switch combination circuit and this analog/digital converter, and the signal that can provide this transmission/reception of control and power supply to supply, and function with scanning of providing (channel selection) signal, according to the digital signal that this analog/digital converter provided, carry out the calculating of wireless-no battery pointing device position simultaneously.
2. a kind of digiboard system as claimed in claim 1 with the signal transmission/reception between multichannel switch combination circuit control loop inductance and wireless-no battery pointing device, it is characterized in that, common contact with this loop inductance combination is connected electrically can be connected to an earthing potential.
3. transmission and the method for reseptance of multichannel switch combination circuit control with digiboard system of loop inductance and wireless-no battery pointing device is characterized in that this transmission and method of reseptance comprise:
At first, during transmitting signal,
Provide a transmission signal sequence and that is in noble potential " 1 " to be in the sequential of the power supply suppling signal noble potential in first cycle of sequential " 1 ";
Two switches in conducting one power on-off control circuit, wherein a switch is connected to a power supply and another switch is connected to ground;
Provide one scan (channel selection) signal to channel selector by the initial stage of a microprocessor during transmitting signal, go out specific channel and this specific channel of conducting with corresponding; And
This digiboard system constitutes a loop with a loop inductance, and this power supply is fed to this loop inductance, so that can transmit an electromagnetic signal to adjacent space by these aforesaid two switches;
Secondly, equally in during this transmission signal and one be in the power supply suppling signal electronegative potential in first cycle of sequential " 0 " during, two switches in addition in the combination of conducting one power switch and control circuit, wherein a switch is connected to ground one and another switch is connected to power supply;
Simultaneously, also provide amplifier activation/decapacitation signal in during transmitting signal, so that this amplifier circuit is in the state of decapacitation; And
Power supply suppling signal in during transmitting according to this repeats;
During received signal,
Provide a received signal sequential and that is in electronegative potential " 0 " to be in the sequential of the power supply suppling signal noble potential in first cycle of sequential " 1 ";
Make three switches in this power on-off control circuit keep the state of open circuit, but only be total to the switch maintenance conducting of contact ground connection with loop inductance;
Then, during this received signal and in the sequential of the power supply suppling signal electronegative potential in first cycle of sequential " 0 ";
Make three switches in this power on-off control circuit still keep the state of open circuit, but and with loop inductance altogether the switch of contact ground connection still keep conducting;
Provide one scan (channel selection) signal to this channel selector by the initial stage of this microprocessor during received signal, go out specific channel and this specific channel of conducting with corresponding; And
Receive that this is wireless-this electromagnetic signal that no battery pointing device is launched.
4. one kind has the digiboard system that the signal transmission/reception between the multichannel switch combination circuit of loop inductance bi-directional power supply control loop inductance and wireless-no battery pointing device is provided, and it is characterized in that, comprises:
One wireless-no battery pointing device, it receives one first electromagnetic signal that a loop inductance is transmitted, and by an electromagnetic induction store electrical energy so that launch one second electromagnetic signal;
One multichannel switch combination circuit, it is connected electrically with a microprocessor, an amplifier circuit and this loop inductance, with as the digiboard system in the cycle of transmission/reception, select this specific loop inductance to carry out the function of this first electromagnetic signal of transmission/reception and this second electromagnetic signal, this multichannel switch combination circuit further comprises:
One two-way power switch and control circuit combination, it is come the conducting or the open circuit of gauge tap by a transmission/received signal and a power supply suppling signal;
One channel selector, it is connected electrically with this microprocessor, and in this transmission/time of reception interval of this digiboard system, according to scanning (channel selection) signal that this microprocessor sent, the channel that conducting in regular turn is specific and through this loop inductance transmission/received signal;
One channel switch combination, it is connected electrically with this loop inductance, and according to the signal of this channel selector, seeks out a corresponding channel, and this channel and this power switch are made up/this amplifier circuit electric connection; And
The combination of one loop inductance, the one end is connected electrically with this channel switch combination respectively, the other end then is connected electrically with this bi-directional power switch and an amplifier circuit, so that in the time interval that transmits signal, can form a loop and transmit this first electromagnetic signal, simultaneously in the time interval of received signal, receive that this is wireless-this second electromagnetic signal that no battery pointing device is launched;
One amplifier circuit, it is connected electrically with this multichannel switch combination circuit, has the function that this second electromagnetic signal that receives is amplified;
One position signalling change-over circuit, it is connected electrically with this amplifying circuit and an analog/digital converter, has the function that this amplifying signal is converted to the signal with position message;
One pressure signal change-over circuit, it is connected electrically with this amplifying circuit and an analog/digital converter, has the function that this amplifying signal is converted to the signal with pressure message;
One analog/digital converter, it is connected electrically with this position signalling change-over circuit and this pressure signal change-over circuit, has the function that the analog signal conversion that this position signalling change-over circuit and this pressure signal change-over circuit are changed becomes digital signal;
One microprocessor, it is connected electrically with this multichannel switch combination circuit and this analog/digital converter, and the signal that can provide this transmission/reception of control and power supply to supply, and function with scanning of providing (channel selection) signal, according to the digital signal that this analog/digital converter provided, carry out the calculating of wireless-no battery pointing device position simultaneously.
5. a kind of digiboard system that the signal transmission/reception between the multichannel switch combination circuit of loop inductance bi-directional power supply control loop inductance and wireless-no battery pointing device is provided that has as claimed in claim 4, it is characterized in that, this loop inductance during transmitting signal in the formed loop its current polarity opposite alternately.
6. a transmission and method of reseptance with digiboard system of the Supply Method that the multichannel switch combination of loop inductance bi-directional power supply circuit control loop inductance is provided and the loop inductance bi-directional power is provided and wireless-no battery pointing device, it is characterized in that this transmission and method of reseptance comprise:
At first, during transmitting signal,
Provide a transmission signal sequence and that is in noble potential " 1 " to be in the sequential of the noble potential " 1 " in first cycle of power supply suppling signal;
Specific two switches in the combination of turn-on power switch and control circuit, and make this two switch be connected to a power supply and an earth point respectively make one of a loop inductance be connected to this power supply and the other end is connected to this earth point;
The initial stage of one microprocessor during transmitting signal provides one scan (channel selection) signal to channel selector, go out specific channel and this specific channel of conducting with corresponding, make loop inductance constitute a loop, and this power supply is fed to this loop inductance;
Secondly, equally during transmitting signal and one be in first cycle of power supply suppling signal electronegative potential " 0 " during;
Other specific two switches in the combination of turn-on power switch and control circuit, and make this two switch be connected to an earth point and a power supply respectively make loop inductance one be connected to this earth point and the other end is connected to this power supply;
During transmitting signal, provide amplifier activation/decapacitation signal simultaneously, so that amplifier circuit is in the state of decapacitation; And
According to this cycle of the power supply suppling signal in the delivery time interval, repeat;
During received signal,
An one received signal sequential and a power supply suppling signal sequential that is in electronegative potential " 0 " is provided;
Make the combination of this power switch and control circuit and the switch of contact electric connection altogether keep the state of ground connection;
Provide one scan (channel selection) signal to this channel selector by the initial stage of this microprocessor during received signal, go out specific channel and this specific channel of conducting, make loop inductance constitute a loop with corresponding;
Receive one wireless-this electromagnetic signal that no battery pointing device is launched.
7. a kind of transmission and method of reseptance as claimed in claim 6 with digiboard system of the Supply Method that the multichannel switch combination of loop inductance bi-directional power supply circuit control loop inductance is provided and the loop inductance bi-directional power is provided and wireless-no battery pointing device, it is characterized in that, during this transmits signal sequence, this power supply suppling signal in the sequential of noble potential and electronegative potential, the current opposite in direction in its loop inductance.
8. a kind of transmission and method of reseptance as claimed in claim 6 with digiboard system of the Supply Method that the multichannel switch combination of loop inductance bi-directional power supply circuit control loop inductance is provided and the loop inductance bi-directional power is provided and wireless-no battery pointing device, it is characterized in that, during this transmits signal sequence, no matter this power supply suppling signal sequential is in noble potential or electronegative potential, this loop inductance is combined to form a loop by this channel switch.
9. a kind of transmission and method of reseptance as claimed in claim 6 with digiboard system of the Supply Method that the multichannel switch combination of loop inductance bi-directional power supply circuit control loop inductance is provided and the loop inductance bi-directional power is provided and wireless-no battery pointing device, it is characterized in that, during this received signal sequential, no matter this power supply suppling signal sequential is in noble potential or electronegative potential, this loop inductance is combined to form a loop by this channel switch, and this is wireless to receive-this second electromagnetic signal that no battery pointing device is launched.
10. a kind of transmission and method of reseptance as claimed in claim 6 with digiboard system of the Supply Method that the multichannel switch combination of loop inductance bi-directional power supply circuit control loop inductance is provided and the loop inductance bi-directional power is provided and wireless-no battery pointing device, it is characterized in that, the resonant frequency of the frequency of this power supply suppling signal and wireless-no battery pointing device resonant circuit is almost equal, to induce maximum signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02154600 CN1223966C (en) | 2002-12-10 | 2002-12-10 | Digital board system with multiple-channel switch combination circuit control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02154600 CN1223966C (en) | 2002-12-10 | 2002-12-10 | Digital board system with multiple-channel switch combination circuit control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1506906A true CN1506906A (en) | 2004-06-23 |
| CN1223966C CN1223966C (en) | 2005-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02154600 Expired - Lifetime CN1223966C (en) | 2002-12-10 | 2002-12-10 | Digital board system with multiple-channel switch combination circuit control |
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| Country | Link |
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| CN (1) | CN1223966C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989164B (en) * | 2009-08-05 | 2012-07-25 | 太瀚科技股份有限公司 | Electronic white board and positioning method thereof |
| CN102841552A (en) * | 2011-06-20 | 2012-12-26 | 太瀚科技股份有限公司 | Digital board integrated chip |
-
2002
- 2002-12-10 CN CN 02154600 patent/CN1223966C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101989164B (en) * | 2009-08-05 | 2012-07-25 | 太瀚科技股份有限公司 | Electronic white board and positioning method thereof |
| CN102841552A (en) * | 2011-06-20 | 2012-12-26 | 太瀚科技股份有限公司 | Digital board integrated chip |
| CN102841552B (en) * | 2011-06-20 | 2014-12-17 | 太瀚科技股份有限公司 | Digital board integrated chip |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1223966C (en) | 2005-10-19 |
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