CN104345920A - Active control method of capacitive stylus and active capacitive stylus - Google Patents
Active control method of capacitive stylus and active capacitive stylus Download PDFInfo
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- CN104345920A CN104345920A CN201410011991.3A CN201410011991A CN104345920A CN 104345920 A CN104345920 A CN 104345920A CN 201410011991 A CN201410011991 A CN 201410011991A CN 104345920 A CN104345920 A CN 104345920A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000006698 induction Effects 0.000 claims abstract description 124
- 238000001514 detection method Methods 0.000 claims description 63
- 230000005540 biological transmission Effects 0.000 claims description 8
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 8
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 230000005057 finger movement Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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Abstract
The invention relates to an active control method of a capacitive touch pen and the active capacitive touch pen, which mainly comprises a pen body, an induction piece arranged on the pen body and a control module arranged in the pen body and electrically connected with the induction piece to form the active capacitive touch pen; when the active capacitive touch pen is used on a capacitive touch panel, the control module receives a first driving signal from the touch panel through the sensing element and detects the intensity of the first driving signal, then generates a second driving signal which corresponds to the intensity of the first driving signal and has opposite phase, and sends the second driving signal to a corresponding sensing line on the touch panel through the sensing element so as to simulate the touch operation of a finger; therefore, the active capacitance touch control pen which can independently operate without the support of software and hardware technologies of the touch control panel is provided.
Description
Technical field
The invention relates to a kind of capacitive touch pen, particularly relate to a kind of active capacitive touch pen and control method thereof.
Background technology
Known capacitive touch pen can be divided into passive type and active, wherein, passive type capacitive touch pen has simple structure, advantage with low cost, the nib that one conductive material is made mainly is provided, ground connection when gripping body by user, or utilize material behavior to simulate human body dielectric coefficient, make to change its induction amount during nib contact contact panel.But the shortcoming of passive type capacitive touch pen is to contact and reaches more than certain area and just can respond to, therefore very large, the low precision of nib, also cannot provide multistage pressure classification simultaneously.And active capacitive touch pen does not have above-mentioned restriction and shortcoming, but existing active capacitive touch pen also cannot be applicable to general capacitance touching control panel, with regard to the use of active capacitive touch pen, capacitance touching control panel must there is the processor supporting preceding paragraph function, could with the use of active capacitive touch pen.In other words, there is technical support issue in active capacitive touch pen, as passive type capacitive touch pen, can directly cannot use on existing capacitance touching control panel, therefore how restricted on using, and have inconvenience.
From the above, active capacitive touch pen has multistage pressure classification and preferably performance, but specific software and hardware support must be had in capacitance touching control panel, could normally use this active capacitive touch pen on capacitance touching control panel, therefore have obvious inconvenience.
Summary of the invention
Therefore fundamental purpose of the present invention is, provides a kind of active capacitive touch pen, and it does not need specific software and hardware support on capacitance touching control panel, gets final product directly independent operating on general mutual tolerance formula capacitance touching control panel.
The technical way taked for reaching aforementioned object is that aforementioned active capacitive touch pen is included:
A body, it has a front end;
More than one induction pieces, it is arranged at the front end of aforementioned body;
More than one control module, it is arranged in aforementioned body, and is electrically connected with induction pieces; This control module is by first drive singal of induction pieces reception one from contact panel, and after detecting its intensity, the intensity of corresponding aforementioned first drive singal is to produce and to transmit one second drive singal, and wherein the phase place of this first drive singal and the phase place of this second drive singal are anti-phase.
Another object of the present invention is, provides a kind of active control method of capacitive touch pen.
The technical way taked for reaching aforementioned object is that preceding method is comprised:
Receive one first drive singal from contact panel;
Detect the intensity of aforementioned first drive singal;
The intensity of corresponding aforementioned first drive singal is to produce and to transmit one second drive singal, and wherein the phase place of this first drive singal and the phase place of this second drive singal are anti-phase.
When aforementioned active capacitive touch pen uses on mutual tolerance formula contact panel, control module by a body is received from the first drive singal on mutual tolerance formula contact panel by induction pieces and after detecting its signal intensity, produces corresponding first drive signal strength and the second anti-phase drive singal; According to the principle of work of mutual tolerance formula contact panel, transmit drive singal by the line of induction of an axle (such as X-axis), and by another axle (such as Y-axis) the line of induction via equivalence coupling capacitance receive drive singal to produce an influence value, when there being finger touch mutual tolerance formula contact panel, another electric capacity will be produced between contact panel and finger, then the influence value that another axle line of induction is detected is declined, by this can according to transmitting the line of induction of drive singal and detecting that the line of induction that influence value declines decides by the position of finger touch to carry out report point.And active capacitive touch pen of the present invention is when contacting mutual tolerance formula contact panel, first respond to the drive singal that the reception one axle line of induction transmits, then its signal intensity is judged, produce according to this again and transmit one and correspond to the first drive signal strength and the second anti-phase drive singal, this second drive singal and the first drive singal are all received by another axle line of induction on mutual tolerance formula contact panel, but the second drive singal and the first drive singal is anti-phase, therefore formation is reduced, the influence value that another axle line of induction is measured declines, use the state of simulation finger touch, owing to being simulation finger movement, therefore for contact panel, and software and hardware support need not be provided for the use of active capacitive touch pen, then can solve active capacitive touch pen in the past must provide software and hardware support by contact panel and have the problem using object restriction.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention's active capacitive touch pen one embodiment.
Fig. 2 is the circuit block diagram of the present invention's active capacitive touch pen one embodiment.
Fig. 3 A, 3B are that the active capacitive touch pen of the present invention adjusts the schematic diagram of the second drive signal amplitude according to the first drive singal of varying strength.
Fig. 4 A, 4B are that the active capacitive touch pen of the present invention adjusts the schematic diagram of the second drive singal sequential according to the first drive singal of varying strength.
Fig. 5 A, 5B are that the active capacitive touch pen of the present invention adjusts the schematic diagram of the second drive singal voltage conversioning rate according to the first drive singal of varying strength.
Fig. 6 is the circuit diagram of the present invention's active capacitive touch pen one embodiment.
Fig. 7 is the working waveform figure of the present invention's active capacitive touch pen one embodiment.
Fig. 8 is the control module circuit diagram of the another embodiment of the active capacitive touch pen of the present invention.
Fig. 9 is the planimetric map of the active capacitive touch pen of a present invention embodiment again.
Figure 10 is the face upwarding view of the active capacitive touch pen of a present invention embodiment again.
Figure 11 is the control module circuit diagram of the active capacitive touch pen of a present invention embodiment again.
Symbol description:
Embodiment
About the active capacitive touch pen of the present invention, one preferred embodiment refers to shown in Fig. 1, in a body 10, be mainly provided with more than one control module 20 and a power module 30, this control module 20 is electrically connected with power module 30, by its supply working power.This body 10 has a front end, and its front end is provided with more than one induction pieces 11, and in the present embodiment, this body 10 front end is provided with an induction pieces 11, and this induction pieces 11 and control module 20 are electrically connected, and receives to respond to or transmits drive singal.
Refer to shown in Fig. 2, aforementioned control module 20 comprises more than one signal detection circuit 21, more than one signal strength detection circuit 22, controller 23 and more than one driving signal generator 24; In the present embodiment, be mainly made up of signal detection circuit 21, signal strength detection circuit 22, controller 23 and a driving signal generator 24; Wherein: this signal detection circuit 21 has an input end and an output terminal, its output terminal is connected with the input end of signal strength detection circuit 22, the output terminal of this signal strength detection circuit 22 is connected with controller 23, this controller 23 has more than one input end and multiple output terminal, its input end is connected with signal strength detection circuit 22, and wherein an output terminal is then connected with driving signal generator 24; In the present embodiment, the output terminal of this driving signal generator 24 is switchably be connected with induction pieces 11 under controller 23 controls with the input end of signal detection circuit 21.
The active capacitive touch pen utilizing foregoing circuit to form can apply to mutual tolerance formula contact panel, and is run by following mode:
When active capacitive touch pen to contact with the induction pieces 11 of a body 10 front end or near mutual tolerance formula contact panel time, one first drive singal receiving a wherein axle line of induction transmission on mutual tolerance formula contact panel will be responded to by signal detection circuit 21, and judge its signal intensity by signal strength detection circuit 22, control this driving signal generator 24 by controller 23 again to produce one and correspond to this first drive signal strength and the second anti-phase drive singal, and transmit via induction pieces 11, then the line of induction of another axle of mutual tolerance formula contact panel will receive the first drive singal and the second drive singal respectively, and an influence value is produced via Analog-digital Converter, due to the second drive singal and the first drive singal anti-phase, therefore the influence value caused on another axle line of induction is declined, simulate the state of finger touch by this.
Because mutual tolerance formula contact panel forms a coupling capacitance Cp respectively between an axle line of induction and another axle sense line, its type of drive then sends drive singal by an axle line of induction, another axle line of induction receives analogue inductive signal, produces influence value through Analog-digital Converter; If when touching the somewhere of mutual tolerance formula contact panel with finger, by electric capacity Cf new for generation one, this electric capacity Cf connects with the coupling capacitance Cp of touch place, thus will the influence value of touch place be declined, therefore controller 23 can determine whether report a little via the influence value change judged on another axle line of induction.And active capacitive touch pen of the present invention, the phenomenon namely when simulating above-mentioned finger touch, the influence value on another axle line of induction being declined, it is when the first drive singal that the reception one axle line of induction is sent, intensity according to the first drive singal is sent a second anti-phase drive singal accordingly, thus another axle line of induction is except reception first drive singal, also the second drive singal is received, due to the second drive singal and the first drive singal anti-phase, and the first drive singal generation is reduced, the influence value of another axle line of induction is caused to decline, just as the result produced after finger touch.
As described in aforementioned, output terminal and the input end of signal detection circuit 21 of this driving signal generator 24 are switchably connected with induction pieces 11 under controller 23 controls.When controller 23 makes the input end of signal detection circuit 21 be connected with induction pieces 11, be receive the first drive singal under a receiving mode; When the input end of signal detection circuit 21 is cut off induction pieces 11 by controller 23, and when the output terminal of driving signal generator 24 and induction pieces 11 are electrically connected, be then a drive pattern, and in order to transmit the second drive singal.
Due on mutual tolerance formula contact panel wherein each line of induction of an axle be that alternately transmits the first drive singal, even if the position of active electric capacity Pointer contacts is not on the line of induction transmitting drive singal, or the drive singal that this line of induction transmits can be received, difference is intensity difference, for simulating the situation of finger touch, controller 23 will adjust the characteristic of the second drive singal according to the intensity of the first drive singal, such as based on the varying strength of the first drive singal, equal proportion ground changes the amplitude size of the second drive singal, voltage conversioning rate (slew rate) or sequential (delay), change the influence value distribution situation of touch location periphery by this, to be modeled to the profile of finger, and peak value is formed centrally in profile, and determine report point position by peak value.
Refer to shown in Fig. 3 A, Fig. 3 B, when the induction pieces 11 of a body 10 front end is positioned at above the line of induction Tx of transmission first drive singal, the second drive singal original amplitude that induction pieces 11 transmits to mutual tolerance formula contact panel is as shown in waveform on the right side of Fig. 3 A.If the induction pieces 11 of a body 10 front end is not positioned at above the line of induction Tx of transmission first drive singal, and when there is a distance, delta D (as shown in Figure 3 B), the first drive signal strength that now this first drive signal strength received by signal detection circuit 21 is received under being less than Fig. 3 A situation, therefore the second drive singal of transmitting to mutual tolerance formula contact panel of induction pieces 11 by corresponding first drive signal strength amplitude contraction (on the right side of Fig. 3 B shown in waveform), the size geometric ratio of amplitude is in induction pieces 11 and the distance, delta D transmitting the first drive singal line of induction Tx, namely distance, delta D is larger, amplitude is less.Because the second drive signal amplitude diminishes, for another axle line of induction receive the first drive singal the degree that reduces diminish, its influence value fall also diminishes.
Another embodiment discloses, if during according to the first drive singal of varying strength to adjust the sequential of the second drive singal, refer to shown in Fig. 4 A, Fig. 4 B, when the induction pieces 11 of a body 10 front end is positioned at above the line of induction Tx of transmission first drive singal, induction pieces 11 to mutual tolerance formula contact panel transmit the second drive singal pulse wave sequential be as shown in waveform on the right side of Fig. 4 A.If the induction pieces 11 of a body 10 front end is not positioned at above the line of induction Tx of transmission first drive singal, and when there is a distance, delta D (as shown in Figure 4 B), then control module 20 will be delayed and transmit the second drive singal to mutual tolerance formula contact panel (on the right side of Fig. 4 B shown in waveform) by induction pieces 11, when the second drive singal is more early sent, the time first drive singal generation being reduced to impact is longer, that is the influence value on another axle line of induction can decline more; Otherwise the second drive singal is more sent evening, the time affecting the first drive singal is shorter, and the influence value on another axle line of induction declines less.As for the time length geometric ratio delayed in induction pieces 11 and the distance, delta D transmitting the first drive singal line of induction Tx, distance, delta D is less, and the first drive signal strength is stronger, more early sends the second drive singal; Distance, delta D is larger, and the first drive signal strength is more weak, more sends the second drive singal evening.
Moreover alleged voltage conversioning rate (slew rate) refers to that pulse wave electric voltage is raised to the time needed for crest by trough, is also dv/dt.When voltage conversioning rate height, energy is comparatively strong, and when voltage conversioning rate is low, then energy is relatively weak.Therefore, if during according to the first drive singal of varying strength to adjust the voltage conversioning rate of the second drive singal, refer to shown in Fig. 5 A, Fig. 5 B, when the induction pieces 11 of a body 10 front end is positioned at above the line of induction Tx of transmission first drive singal, induction pieces 11 has larger voltage conversioning rate (as shown in waveform on the right side of Fig. 5 A) to the second drive signal waveform that mutual tolerance formula contact panel transmits.If above the line of induction Tx that the induction pieces 11 of a body 10 front end is not positioned at transmission first drive singal and when there is a distance, delta D (as shown in Figure 5 B), induction pieces 11 will reduce its voltage conversioning rate (on the right side of Fig. 5 B shown in waveform) to the second drive singal that mutual tolerance formula contact panel transmits, and the amplitude geometric ratio that voltage conversioning rate reduces is in induction pieces 11 and the distance transmitting the first drive singal line of induction Tx.Namely this first drive signal strength is stronger, makes the voltage conversioning rate of this second drive singal higher, to improve the energy of the second drive singal; When this first drive signal strength is more weak, then reduce the voltage conversioning rate of this second drive singal, to provide more low-energy second drive singal.
Further specifically construct, shown in Fig. 6 about the active capacitive touch pen of the present invention:
This signal detection circuit 21 has an input end and an output terminal, and its input end is electrically connected with induction pieces; In the present embodiment, this signal detection circuit 21 is made up of a current mirror, and its input end is electrically connected by one first switch S 1 and induction pieces 11, and its output terminal is then connected with signal strength detection circuit 22.When
This signal strength detection circuit 22 has an input end and an output terminal, and its input end is connected with the output terminal of aforementioned signal detecting circuit 21; In the present embodiment, this signal strength detection circuit 22 comprises comparer 221 and an integrator 222, and this comparer 221 has an input end, a reference edge Vref and an output terminal, and its output terminal is connected with controller 23; This integrator 222 has an input end and an output terminal, and its input end is connected with the output terminal of signal detection circuit 21, and the output terminal of integrator 222 is connected with the input end of comparer 221.
Aforementioned integrator 222 comprises the switch S 3 that an electric capacity C1 and is controlled by controller 23, and this electric capacity C1 is connected between the input end of this comparer 221 and an earth terminal, and aforementioned switches S3 is in parallel with electric capacity C1.
This controller 23 has more than one input end and multiple output terminal, and wherein an input end is connected with the output terminal of signal strength detection circuit 22, when signal detection circuit 21 sends a drive singal to signal strength detection circuit 22, its integrator 222 will start integration, namely its electric capacity C1 starts charging, when charging voltage is greater than the reference voltage terminal Vref of comparer 221, namely the output terminal of comparer 221 produces a noble potential on the corresponding input end of controller 23, then controller 23 i.e. gauge tap S3 starts to open and close, the every conducting of switch S 3 once, namely electric capacity C1 puts once electricity, along with the accumulation of switch S 3 conducting number of times, voltage on comparer 221 input end will decline gradually, when dropping to lower than reference voltage terminal Vref, the output potential of comparer 221 changes, by this controller 23 can according to the number of times of its open-close on-off S3 calculate signal detection circuit 21 detect the intensity of the first drive singal.A second corresponding drive singal is produced by this driving signal generator 24 again by controller 23.
In the present embodiment, this driving signal generator 24 comprises an a fixed resistance R and variable resistor VR, one end that one end of this fixed resistance R is connected in series this variable resistor VR forms a divider node, the other end then ground connection of this fixed resistance R, the other end of this variable resistor VR then connects a voltage source (V), be made up of the output terminal of driving signal generator 24 divider node, and be connected with induction pieces 11 by a second switch S2; The resistance of this variable resistor VR is controlled by controller 23.This fixed resistance R and variable resistor VR, except above-mentioned connected mode, also can connect voltage source (V) by the other end of this fixed resistance R, the other end ground connection of this variable resistor VR.
First, second switch S 1 aforementioned, S2 are connected with controller 23 respectively, and control this first, second switch S 1, S2 keying by controller 23.
According to voltage divider principle, when the resistance of variable resistor VR changes, namely the current potential on its divider node changes thereupon, and therefore controller 23 can via the resistance changing variable resistor VR, to adjust the current potential size (amplitude) of the second drive singal.
Below the principle of work of the further aforementioned active capacitive touch pen of Fig. 7 is only coordinated:
When mutual tolerance formula contact panel works, wherein alternately is transmitted the first drive singal Tx by each line of induction of an axle, and when active capacitive touch pen is surperficial near to or in contact with mutual tolerance formula contact panel with the induction pieces 11 of its body 10 front end, the controller 23 of its control module 20 will make the first switch S 1 conducting, second switch S2 opens a way, to enter a receiving mode, now signal detection circuit 21 will detect the falling edge of the first drive singal Tx pulse wave, then detected the intensity of the first drive singal Tx via the comparer 221 of signal strength detection circuit 22 and integrator 222 by controller 23, the first switch S 1 is made to open a way subsequently, second switch S2 conducting, to enter a drive pattern, and start this driving signal generator 24 by controller 23 and produce the second contrary drive singal Tx ' of a phase place, send via induction pieces 11, for another axle line of induction of mutual tolerance formula contact panel, not only can receive the first drive singal Tx, also the second drive singal Tx ' can be received, because the second drive singal Tx ' phase place is contrary with the first drive singal Tx, therefore the second drive singal Tx ' will cause the first drive singal Tx and reduce, and after reducing, namely the signal Rx that another axle line of induction of mutual tolerance formula contact panel receives weakens relatively, through being converted to influence value, can be used as the foundation of report point.
Moreover, as as described in aforementioned, when distance between the induction pieces 11 and the line of induction transmitting the first drive singal Tx of a body 10 front end becomes large, the weakened of the first drive singal Tx received by active capacitive touch pen, now the controller 23 of control module 20 is by the signal intensity according to the first drive singal Tx, start the second drive singal Tx ' that driving signal generator 24 produces a correspondence, according to the above embodiments, controller 23 can change the resistance of variable resistor VR in driving signal generator 24, to adjust pulse wave current potential (amplitude) size of the second drive singal Tx ', and then change the influence value distribution situation of touch location periphery and simulate finger contours.
Refer to shown in Fig. 8, for the circuit diagram of the another preferred embodiment of the active capacitive touch pen of the present invention, still comprise signal detection circuit 21, signal strength detection circuit 22, controller 23 and a driving signal generator 24 ', its circuit structure is roughly the same with previous embodiment, difference is in the present embodiment, this driving signal generator 24 ' under the control of controller 23, can change the voltage conversioning rate of the second drive singal.About the physical circuit of this driving signal generator 24 ' and principle of work in detail as described below.
This driving signal generator 24 ' comprises an a fixed resistance R and variable resistor VR, one end that one end of this fixed resistance R is connected in series this variable resistor VR forms a divider node, the other end then ground connection of this fixed resistance R, the other end of this variable resistor VR then connects a fixed current source (I), be made up of the output terminal of driving signal generator 24 ' divider node, and be connected with induction pieces 11 by a second switch S2; The resistance of this variable resistor VR is controlled by controller 23.Identical with previous embodiment: this fixed resistance R and variable resistor VR, except above-mentioned connected mode, also can be connected and fixed current source (I) by the other end of this fixed resistance R, the other end ground connection of this variable resistor VR.
According to foregoing circuit design, by controller 23 by changing the resistance of variable resistor VR, the voltage of the second drive singal can be changed, immediately its voltage conversioning rate of adjustable, and determining the energy intensity of the second drive singal.
Disclose concrete structure and the principle of work of an induction pieces 11 and single control module 20 in the aforementioned embodiment.Below in an example, the embodiment of multiple induction pieces 11 with multiple control module 20 will be disclosed further, refer to Fig. 9, shown in Figure 10, announcement has a body 10 ', the front end of this body 10 ' is provided with multiple with radial and equiangularly arranged induction pieces 11A ~ 11H, in the present embodiment, this induction pieces 11A ~ 11H has eight altogether, and each induction pieces 11A ~ 11H respectively with independently control module (not shown) electrical connection, each induction pieces 11A ~ 11H coordinates corresponding control module independent operating, it responds to reception respectively from the first drive singal, and the varying strength of the first drive singal is received according to each self-induction, produce and transmit the second drive singal of respective intensities.
Below in an example, the combination form of further announcement multiple induction pieces 11A ~ 11H and single control module 20 ', circuit structure about this control module 20 ' please refer to shown in Figure 11, it comprises: multiple signal detection circuit 21 ', multiple signal strength detection circuit 22 ', controller 23, driving signal generator 24 " and controller 23 control first, second switch S 1, S2; The circuit structure of each signal detection circuit 21 ' is identical with the signal detection circuit 21 of foregoing embodiments, the circuit structure of each signal strength detection circuit 22 ' is identical with the signal strength detection circuit 22 of foregoing embodiments, this driving signal generator 24 " circuit structure can with the driving signal generator 24 or 24 of previous embodiment ' identical.The output terminal of input end respectively with signal detection circuit 21 ' of each signal strength detection circuit 22 ' is connected, the output terminal of each signal strength detection circuit 22 ' is then connected to controller 23 jointly, one output terminal and the driving signal generator 24 of this controller 23 " be connected, the output terminal of this driving signal generator 24 is electrically connected by second switch S2 and each induction pieces 11A ~ 11H.
In the present embodiment, this is first years old, second switch S1, S2 is made up of a multiplexer (MUX) respectively, wherein the first switch S 1 has multiple input end and multiple output terminal, each input end is connected with each induction pieces 11A ~ 11H respectively, each output terminal is connected with each signal detection circuit 22 ' respectively, it is by the control of controller 23, make the conducting in turn of paired input end and output terminal, each induction pieces 11A ~ 11H alternately is made to connect corresponding signal detection circuit 21 ', reception first drive singal is responded to respectively by each induction pieces 11A ~ 11H by each signal detection circuit 21 ', and deliver to corresponding signal strength detection circuit 22 ' respectively and detect notification controller 23 after its signal intensity, by controller 23 driving signal generator 24 " produce the second drive singal of varying strength respectively, switching through second switch S2 is sent by each induction pieces 11A ~ 11H respectively.
In the present embodiment, second switch S2 is the multiplexer of one-to-many, it has an input end and multiple output terminal, its input end and driving signal generator 24 " output terminal be connected; each output terminal is electrically connected with each induction pieces 11A ~ 11H respectively; and the input end of second switch S2 connects with each output terminal in turn under the control of controller 23, namely this driving signal generator 24 " under controller 23 controls produce varying strength the second drive singal be sent respectively by different induction pieces 11A ~ 11H by second switch S2.
According to the content of previous embodiment, each induction pieces 11A ~ 11H alternately will respond to reception first drive singal and transmit the second drive singal, under active capacitive touch pen is in receiving mode, controller 23 will first cut out second switch S2, make input end paired in the first switch S 1 simultaneously, output terminal is connected in turn, the first drive singal allowing the signal detection circuit 21 ' of each correspondence detect contact panel respectively to send, because each induction pieces 11A ~ 11H lays respectively at the different angles place of a body 11 front end, when convergence contact panel, not identical with the distance of the line of induction transmitting the first drive singal in contact panel yet, therefore the first drive signal strength received also can be different, and the first drive singal received is responded to by each induction pieces 11A ~ 11H, its intensity is detected respectively by the signal intensity detecting circuit 22 ' of correspondence, and testing result is delivered to controller 23, this driving signal generator 24 is controlled by controller 23 " produce respective intensities respectively and the second anti-phase drive singal, to send the second drive singal respectively by different induction pieces 11A ~ 11H in the drive mode, the line of induction for contact panel receives.
When active capacitive touch pen is drive pattern, then close the first switch S 1 by controller 23, and the input end of second switch S2 is electrically connected with each output terminal in turn, the second drive singal of varying strength is sent by different induction pieces 11A ~ 11H respectively.Meaning namely, each induction pieces 11A ~ 11H will receive the first drive singal of varying strength in the receiving mode respectively, and in the drive mode the intensity according to the first drive singal is sent the second drive singal respectively, the second drive signal strength that wherein each induction pieces 11A ~ 11H transmits corresponds to the intensity that it receives the first drive singal.
In another previous embodiment, the intensity responding to the first drive singal due to each induction pieces 11A ~ 11H is different, also can apply to judge the tilt condition of a body 10 relative to contact panel.
From the above, the present invention utilizes aforementioned means and control method, finger movement is simulated by active capacitive touch pen, for contact panel, software and hardware support need not be provided for the use of active capacitive touch pen, in other words, active capacitive touch pen of the present invention can on mutual tolerance formula contact panel independent operating, thus solve in the past active capacitive touch pen must provide software and hardware support by contact panel and have use object restriction problem.
Claims (25)
1. an active control method for capacitive touch pen, comprising:
Receive one first drive singal from contact panel;
Detect the intensity of described first drive singal;
The intensity of corresponding described first drive singal is to produce and to transmit one second drive singal, and wherein the phase place of this first drive singal and the phase place of this second drive singal are anti-phase.
2. the active control method of capacitive touch pen according to claim 1, wherein, described first drive singal is a pulse wave signal, and described second drive singal is the pulse wave signal that amplitude first drive signal strength changes.
3. the active control method of capacitive touch pen according to claim 2, wherein, this first drive signal strength is more weak, and the amplitude of the second drive singal is less; This first drive signal strength is stronger, and the amplitude of the second drive singal is larger.
4. the active control method of capacitive touch pen according to claim 1, wherein, described first drive singal is a pulse wave signal, and described second drive singal one determines to transmit the pulse wave signal of sequential with the first drive signal strength.
5. the active control method of capacitive touch pen according to claim 4, wherein, this first drive signal strength is stronger, more early sends the second drive singal, reduces impact to improve to the first drive singal; This first drive signal strength is more weak, more sends the second drive singal evening, reduces impact to reduce to the first drive singal.
6. the active control method of capacitive touch pen according to claim 1, wherein, described first drive singal is a pulse wave signal, the pulse wave signal of described second drive singal to be one according to the varying strength of the first drive singal be different voltage conversioning rate.
7. the active control method of capacitive touch pen according to claim 6, wherein, this first drive signal strength is stronger, and the voltage conversioning rate of this second drive singal is higher; This first drive signal strength is more weak, and the voltage conversioning rate of this second drive singal is lower.
8. an active capacitive touch pen, comprising:
A body, it has a front end;
More than one induction pieces, it is arranged at the front end of described body;
More than one control module, it is arranged in described body, and is electrically connected with induction pieces; This control module is by first drive singal of induction pieces reception one from contact panel, and after detecting its intensity, the intensity of corresponding described first drive singal is to produce and to transmit one second drive singal, and wherein the phase place of this first drive singal and the phase place of this second drive singal are anti-phase.
9. active capacitive touch pen according to claim 8, wherein, this control module comprises:
More than one signal detection circuit, it has an input end and an output terminal, and its input end is electrically connected with induction pieces;
More than one signal strength detection circuit, it has an input end and an output terminal, and its input end is connected with the output terminal of signal detection circuit;
One controller, it has more than one input end and multiple output terminal, and one input end is connected with the output terminal of signal strength detection circuit;
More than one driving signal generator, it is in order to produce the second drive singal, and it has a control end and a signal output part, and its control end is connected with an output terminal of controller, its signal output part and induction pieces electrical connection.
10. active capacitive touch pen according to claim 9, wherein, this driving signal generator comprises a fixed resistance and a variable resistor further, and this fixed resistance and variable resistor are connected in series with one end and provide a divider node, form signal output part by divider node; This fixed resistance is connected voltage source or ground connection respectively with the variable-resistance other end, and this variable resistor is connected with controller, and controls its resistance by controller.
11. active capacitive touch pens according to claim 9, wherein, this driving signal generator comprises a fixed resistance and a variable resistor, and this fixed resistance and variable resistor are connected in series with one end and provide a divider node, form signal output part by divider node; This fixed resistance and the variable-resistance other end are connected fixed current source or a ground connection respectively, and this variable resistor is connected with controller, and control its resistance by controller.
12. active capacitive touch pens according to claim 9, wherein, this driving signal generator controls by controller the transmission sequential adjusting the second drive singal.
13. active capacitive touch pens according to any one of claim 9 to 12, this signal strength detection circuit comprises a comparer and an integrator, and this comparer has an input end, a reference edge and an output terminal, and its output terminal is connected with controller; Reference edge connects a reference voltage;
This integrator has an input end and an output terminal, and its input end is connected with the output terminal of signal detection circuit, and its output terminal is connected with the input end of comparer.
14. active capacitive touch pens according to claim 13, wherein, this integrator comprises an electric capacity and a switch, this electric capacity is connected between the input end of comparer and an earth terminal, this switch and Capacitance parallel connection, this switch is connected with this controller, and its keying that is controlled by the controller.
15. active capacitive touch pens according to claim 14, wherein, this signal detection circuit is a current mirror.
16. active capacitive touch pens according to any one of claim 9 to 12, wherein, the input end of this signal detection circuit is connected with induction pieces respectively by one first switch, a second switch with the output terminal of driving signal generator; This first, second switch controls it by controller to open and close.
17. active capacitive touch pens according to claim 15, wherein, this input goes out the input end of circuit and is connected with induction pieces respectively by one first switch, a second switch with the output terminal of driving signal generator; This first, second switch is connected with controller respectively, controls it open and close by controller.
18. active capacitive touch pens according to any one of claim 9 to 12, wherein, have multiple induction pieces and multiple control module, and each induction pieces respectively with one control module is electrically connected.
19. active capacitive touch pens according to claim 18, wherein, have multiple induction pieces, and described induction pieces radially and be angularly arranged at a body front end.
20. active capacitive touch pens according to claim 17, wherein, have multiple induction pieces and multiple control module, and each induction pieces respectively with one control module is electrically connected.
21. active capacitive touch pens according to claim 20, wherein, have multiple induction pieces, and described induction pieces radially and be angularly arranged at a body front end.
22. active capacitive touch pens according to any one of claim 9 to 12, wherein, this body front end is provided with multiple induction pieces, and is provided with a control module in a body;
This control module comprises multiple signal detection circuit, multiple signal strength detection circuit, one first switch and a second switch; The input end of each signal strength detection circuit is connected with the output terminal of each signal detection circuit respectively, and the output terminal of each signal strength detection circuit is connected to controller jointly;
This first switch has multiple input end and multiple output terminal, and each input end is connected with each induction pieces respectively, and each output terminal is connected with each signal detection circuit respectively, is controlled to make the conducting in turn of paired input end and output terminal by controller;
This second switch has an input end and multiple output terminal, and its input end is connected with the output terminal of driving signal generator, and each output terminal is electrically connected with each induction pieces respectively; The input end of second switch is controlled by controller, is electrically connected in turn with each output terminal.
23. active capacitive touch pens according to claim 22, wherein, described induction pieces radially and be angularly arranged at a body front end.
24. active capacitive touch pens according to claim 15, wherein, this body front end is provided with multiple induction pieces, and is provided with a control module in a body;
This control module comprises multiple signal detection circuit, multiple signal strength detection circuit, one first switch and a second switch; The input end of each signal strength detection circuit is connected with the output terminal of each signal detection circuit respectively, and the output terminal of each signal strength detection circuit is connected to controller jointly;
This first switch has multiple input end and multiple output terminal, and each input end is connected with each induction pieces respectively, and each output terminal is connected with each signal detection circuit respectively, is controlled to make the conducting in turn of paired input end and output terminal by controller;
This second switch has an input end and multiple output terminal, and its input end is connected with the output terminal of driving signal generator, and each output terminal is electrically connected with each induction pieces respectively; The input end of second switch is controlled by controller, is electrically connected in turn with each output terminal.
25. active capacitive touch pens according to claim 24, wherein, described induction pieces radially and be angularly arranged at a body front end.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102128620 | 2013-08-09 | ||
| TW102128620A TWI521394B (en) | 2013-08-09 | 2013-08-09 | Capacitive active multi-stylus and control method for the capacitive active multi-stylus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104345920A true CN104345920A (en) | 2015-02-11 |
Family
ID=52501719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410011991.3A Pending CN104345920A (en) | 2013-08-09 | 2014-01-10 | Active control method of capacitive stylus and active capacitive stylus |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104345920A (en) |
| TW (1) | TWI521394B (en) |
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| CN105468169A (en) * | 2014-08-13 | 2016-04-06 | 比亚迪股份有限公司 | Capacitance pen and capacitance pen locating method |
| CN105955526A (en) * | 2016-04-22 | 2016-09-21 | 汉王科技股份有限公司 | Touch device |
| CN106843545A (en) * | 2017-02-21 | 2017-06-13 | 宇昶半导体股份有限公司 | Active stylus and its control method |
| CN107533384A (en) * | 2015-04-20 | 2018-01-02 | 株式会社和冠 | Method, sensor controller and the active stylus of active stylus and sensor controller are used |
| WO2020001283A1 (en) * | 2018-06-28 | 2020-01-02 | 京东方科技集团股份有限公司 | Active pen, touch input system, and driving method |
| WO2021035528A1 (en) * | 2019-08-27 | 2021-03-04 | 深圳市汇顶科技股份有限公司 | Active pen driver circuit, driving method, driving chip, and active pen |
| CN113076018A (en) * | 2015-12-17 | 2021-07-06 | 禾瑞亚科技股份有限公司 | Wired active touch control pen |
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| US20170115753A1 (en) * | 2015-10-21 | 2017-04-27 | Waltop International Corporation | Method for detecting orientation of stylus |
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| CN105468169A (en) * | 2014-08-13 | 2016-04-06 | 比亚迪股份有限公司 | Capacitance pen and capacitance pen locating method |
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| CN106843545A (en) * | 2017-02-21 | 2017-06-13 | 宇昶半导体股份有限公司 | Active stylus and its control method |
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Also Published As
| Publication number | Publication date |
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| TWI521394B (en) | 2016-02-11 |
| TW201506699A (en) | 2015-02-16 |
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