CN106843545A - Active stylus and its control method - Google Patents
Active stylus and its control method Download PDFInfo
- Publication number
- CN106843545A CN106843545A CN201710092494.4A CN201710092494A CN106843545A CN 106843545 A CN106843545 A CN 106843545A CN 201710092494 A CN201710092494 A CN 201710092494A CN 106843545 A CN106843545 A CN 106843545A
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- Prior art keywords
- signal
- panel
- panel driving
- driving signal
- active stylus
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Classifications
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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
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The present invention provides a kind of active stylus and its control method, it is adaptable to a contact panel.Contact panel includes multiple driving electrodes and multiple induction electrodes, and each driving electrodes are used to send a panel drive signal, and induction electrode is used to receiving panel drive signal.Active stylus includes a receiving element and is used to show that the characteristics of signals of panel driving signal, a signal generator are used to produce analog drive signal, a driving element to send analog drive signal and a control unit to receiving panel drive signal, a sensing module.Control unit passes through signal generator according to the characteristics of signals of panel driving signal and produces analog drive signal synchronous with panel driving signal and with phase.Thereby, under mutual tolerance pattern, contact panel may achieve multi-point touch and differentiate the function of hand and active stylus.
Description
Technical field
The present invention is on a kind of stylus, particularly a kind of active stylus.
Background technology
The Projected capacitive touch panel of current main flow is mutual capacitance type framework, and these contact panels are typically provided with multiple drivings
Electrode and multiple induction electrode, and those drive, induction electrode is vertically staggered.And those driving, boundaries of induction electrode
Place forms inductance capacitance, and when proficiency abutment contact panel, correspondence inductance capacitance is to produce change, and contact panel just can be obtained
Go out the position of touch of the finger.
On the other hand, stylus is to be commonly used for the aid that assisting user is write or drawn a picture on contact panel.
Stylus on the market is generally classified into passive type and active two kinds, and its Main Differences is that active stylus can be transmitted
Drive signal is sensed for the induction electrode of contact panel, but passive type stylus will not send drive signal.However, existing active
Formula stylus is typically to send the drive signal of simulation finger, the inductance capacitance in contact panel is produced change, but touch surface
The control chip of plate simultaneously cannot differentiate the difference that active stylus or hand are contacted.Although existing manufacturer releases changeable pattern
Contact panel, induction electrode is all switched to when this contact panel is in from molar formula (all electrodes (include driving electrodes)) when,
Its control crystalline substance can just tell the difference of active stylus or hand contact, but this contact panel is only capable of supporting single-point touch.By
This understands that how providing a kind of active stylus can make the function that contact panel realizes that many style of writing controls and resolution hand are touched be phase
Close one of target that dealer makes great efforts.
The content of the invention
In view of this, it is an object of the invention to provide a kind of active stylus and its control method, a touch surface is made
Plate it is distinguishable go out the active stylus and hand touch can also support multi-point touch.
It is that, up to above-mentioned purpose, the present invention provides a kind of active stylus, and it is applied to a contact panel.The contact panel
Include multiple driving electrodes and multiple induction electrodes, each driving electrodes are used to send a panel drive signal, those senses
Electrode is answered to be used to receive the panel driving signal.The active stylus includes a receiving element, a sensing module, a signal
Generator, a driving element and a control unit.The receiving element is used to receive the panel driving signal.The sensing module is coupled
The receiving element, and it is used to the characteristics of signals for reacting on the panel driving signal and drawing the panel driving signal.The signal is produced
Raw device is used to produce an analog drive signal.The driving element couples the signal generator, and is used to send analog-driven letter
Number.The control unit couples the sensing module and the signal generator, and saturating according to the characteristics of signals of the panel driving signal
Cross the signal generator and produce the analog drive signal synchronous with the panel driving signal and with phase.
The present invention separately provides a kind of control method of active stylus, and the active stylus is applied to a touch surface
Plate, the contact panel includes multiple driving electrodes and multiple induction electrodes, and each driving electrodes are used to send panel drive
Dynamic signal, those induction electrodes are used to receive the panel driving signal, and the control method is comprised the steps of.Receive the panel
Drive signal.Obtain the characteristics of signals of the panel driving signal.Produced and this according to the characteristics of signals of the panel driving signal
Panel driving signal is synchronous and with the analog drive signal of phase.Send the analog drive signal.
The sensing signal and the panel driving signal inversion of a finger are sensed by those induction electrodes, when the finger
During with the active Pointer contacts contact panel, correspondence induction electrode will sense two different sensing values of phase, so that
Tell the finger or the active stylus.Additionally, the contact panel can be maintained under mutual tolerance pattern (without by driving electrodes
Switch to induction electrode) realize that the input of most active styluses is controlled.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Brief description of the drawings
Fig. 1 is the element block diagram according to the active stylus of present pre-ferred embodiments.
Fig. 2 is the schematic diagram of contact panel.
Fig. 3 is the flow chart of the control method according to the active stylus of present pre-ferred embodiments.
Fig. 4 A are the oscillogram examples of the panel driving signal transmitted by driving electrodes.
Fig. 4 B are the oscillogram examples of the signal intensity that capacitance sensor is sensed.
Fig. 4 C are the oscillogram examples of analog drive signal.
Fig. 5 is to write schematic diagram and correspondence sense waveform figure example.
Wherein, reference
The hand of 1 active stylus 5
10 receiving elements
The amplifying circuit of 20 sensing module, 21 capacitance sensor 23
The control unit of 30 signal generator, 40 driving element 50
51,53 signal intensities
The induction electrode of 60 contact panel, 61 driving electrodes 63
S31~S37 steps
A1, A2, A3 amplitude D dutycycle f frequencies
SC control signal SC control signal SD analog drive signals
SO output signal SP panel driving signal SS signal intensities
Specific embodiment
Technical solution of the present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings, to be further understood that
The purpose of the present invention, scheme and effect, but it is not intended as the limitation of scope of the appended claims of the present invention.
Refer to the element block diagram that Fig. 1 is the active stylus 1 of a preferred embodiment of the present invention.The active touch-control
Pen 1 includes a receiving element 10, a sensing module 20, a signal generator 30, a driving element 40 and a control unit 50.
The active stylus 1 is applied to a capacitive contact panel 60, refer to Fig. 2, and the contact panel 60 includes multiple drives
Moving electrode 61 and the multiple induction electrodes 63 (i.e. mutual tolerance framework) interlocked with those driving electrodes 61, each driving electrodes 61 are used
To send a panel drive signal SP, those induction electrodes 63 are used to receive panel driving signal SP.
It should be noted that, those drive and the quantity of induction electrode 61,63 is only used for convenient explanation shown in Fig. 2, according to not
Same design requirement, in other embodiment, those drive and induction electrode 61,63 may have varying number.
The receiving element 10 can be the conductive material of any acceptable (sensing) panel driving signal SP (for example, gold
Category, metal oxide, Graphene etc.) made by element.The receiving element 10 is used to receive panel driving signal SP.
The sensing module 20 couples the receiving element 10 and is used to obtain the characteristics of signals (example of panel driving signal SP
Such as, signal intensity, peak value, valley, frequency etc.).The sensing module 20 includes a capacitance sensor 21 and an amplifying circuit 23.
The capacitance sensor 21 reacts on the panel driving signal SP and draws corresponding signal intensity SS (i.e. amplitude or sensing
Value), the amplifying circuit 23 reacts on the panel driving signal SP and exports an output signal SO.In the present embodiment, the amplification
Circuit 23 is a comparator, by the panel driving signal SP and a reference signal (peak value to panel driving signal SP is related)
To the comparator, if the signal intensity of panel driving signal SP is more than the signal intensity of the reference signal, this compares for input
The output signal SO of device output e.g. high potential；Conversely, then the comparator exports the output signal SO of low potential.
It should be noted that, according to different designs demand, the capacitance sensor 21 and the amplifying circuit 23 can be integrated into module,
Chip or circuit, can be separate units both it so in other embodiment.
The signal generator 30 can receive a control signal SC and produce corresponding simulation to drive according to control signal SC
Dynamic signal SD.Control signal SC is the characteristics of signals for indicating analog drive signal SD, and in the present embodiment, the mould
The characteristics of signals for intending drive signal SD includes a dutycycle (duty cycle) and an amplitude at least one of which, Yi Jiyi
Simulated timing diagrams information (for example, the start time point in each cycle, cycle or frequency etc.).
The driving element 40 is and the element made by the same or similar conductive material of receiving element 10.The driving element
40 coupling signal generators 30 simultaneously are used to send analog drive signal SD.
The control unit 50 can be the control of the general service or specific use of microcontroller, chip or other programmeds
The combination of the similar components such as device processed or said elements.The control unit 50 couples the capacitance sensor 21 of the sensing module 20 and puts
Big circuit 23 and the signal generator 30, the control unit 50 can receive signal intensity SS and output signal SO, the control
Unit processed 50 simultaneously has the functions such as timing (such as built-in clock pulse generator, oscillator etc.), computing, record, to send the control
Signal SC is to the signal generator 30.
Preceding description is the element design for being relevant to the active stylus 1, below enters collocation Fig. 3, Fig. 4 A to Fig. 4 C
One step illustrates the control method of the active stylus 1.
It is the oscillogram example of the panel driving signal SP transmitted by wherein one driving electrodes 61 please also refer to Fig. 4 A.Should
Panel driving signal SP is a pulse wave signal with amplitude A1 and frequency f.Fig. 3 is refer to, and works as the active stylus 1
Close to when (for example, about 0.5~1 centimeter) is separated by a certain distance with the contact panel 60, the receiving element 10 can be received
To panel driving signal SP (step S31).
In step S33, the sensing module 20 obtains the characteristics of signals of panel driving signal SP.Refer to Fig. 4 B is this
The oscillogram example of the signal intensity SS that capacitance sensor 21 is sensed, what the capacitance sensor 21 was sensed is one have
The signal of amplitude A2 and frequency f.The capacitance sensor 21 draws its signal intensity for sensing panel driving signal SP
SS。
In the present embodiment, after the signal intensity SS that the control unit 50 obtains panel driving signal SP, in order to
The distance of the active stylus 1 and the contact panel 60 is reacted, the control unit 50 determines the mould according to signal intensity SS
Intend the characteristics of signals of drive signal SD.In the present embodiment, the characteristics of signals of analog drive signal SD is a dutycycle D and
Amplitude A3.Refer to the characteristics of signals that following table (1) is analog drive signal SD：
Table (1)
| Frequency f (kHz) | Dutycycle D | Amplitude A3 (volt) | Signal intensity |
| 100 | 50% | 5 | -20 |
| 100 | 50% | 10 | -40 |
| 100 | 25% | 5 | -10 |
| 100 | 25% | 10 | -20 |
| 100 | 75% | 5 | -30 |
| 100 | 75% | 10 | -60 |
The signal intensity and the active stylus 1 of panel driving signal SP are sensed by the capacitance sensor 21
It is related to the distance between the contact panel 60, thus analog drive signal SD characteristics of signals also with the panel driving signal
The signal intensity of SP and change.Wherein, dutycycle D is relevant to the capacitance sensor 21 and is sensed with the product of amplitude A3
The signal intensity SS for arriving.
It should be noted that, the present embodiment combination pulse width and pulse amplitude modulation PWM, PAM are only for example explanation；
In other embodiment, according to the design requirement of different contact panels, its panel driving signal SP may be with unlike signal or tune
Change mode is encoded, and analog drive signal SD need to then change with the characteristics of signals of panel driving signal SP.
On the other hand, the amplifying circuit 23 then exports an output signal according to the signal intensity of panel driving signal SP
SO.The control unit 50 draws two adjacent peaks of panel driving signal SP according to the output signal SO of the amplifying circuit 23,
Such as control unit 50 judges that output signal SO is to be transformed into high potential by low potential, the control unit 50 and calculate this two
The time difference of adjacent peak is showing that (inverse of time difference is the frequency f) of panel driving signal SP to the frequency.The control
News information determines the simulated timing diagrams information of the analog drive signal SD when by unit 50 according to the panel, in the present embodiment,
The frequency f of panel driving signal SP is equal to the frequency f of analog drive signal SD.Additionally, the control unit 50 can be calculated
The start time points of the panel driving signal SP in each cycle, makes the panel driving signal SP same with analog drive signal SD
Step.
It should be noted that, calculate signal frequency or the mode in cycle also has many kinds, for example, the amplifying circuit 23 is a fortune
Amplifier is calculated, and the control unit 50 can draw a peak value and an adjacent valley of panel driving signal SP, according to the peak
The time difference of value and the valley can also extrapolate frequency；Or, the control unit 50 calculates time difference of two adjacent valleies etc..
In step s 35, the control unit 50 and will be used to indicate this according to the characteristics of signals of panel driving signal SP
The control of the characteristics of signals (i.e. frequency f, amplitude A3, dutycycle D, the start time point in each cycle) of analog drive signal SD
Signal SC is sent to the signal generator 30, synchronous (i.e. with panel driving signal SP to control the signal generator 30 to produce
Frequency and start time point are consistent) analog drive signal SD (as shown in Figure 4 C), the signal generator 30 simultaneously by the simulation drive
The same phases of dynamic signal SD and panel driving signal SP (referring concurrently to 4A, 4C figure).In step S37, the driving element 40 is just
Analog drive signal SD can be transmitted.
Fig. 5 is refer to, when proficiency 5 contacts the contact panel 60 with the active stylus 1, the active stylus 1
Transmitted analog drive signal SD can sense the signal of negative value with the panel driving signal same phases of SP, the then contact panel 60
Intensity 51；And the capacitance variations caused by the hand 5 then make the contact panel 60 sense on the occasion of signal intensity 53, so as to differentiate
Go out the active stylus 1 and the touching of the hand 5.That is, in mutual tolerance pattern, (i.e. those driving electrodes still send the panel
Drive signal SP) under, the contact panel 60 can still pick out the active stylus 1 and the hand 5, and then may filter that the hand 5
The sensing signal writing function tactile to reach anti-hand.Additionally, under mutual tolerance pattern, when two or more, the active stylus 1 is same
When close to the contact panel 60 when, the contact panel 60 can pass through those induction electrodes 63 sequentially sense capacitance change so that
Go out the sensing the feedback of position of those active styluses 1, and will not there's something fishy that point situation occurs.
On the other hand, the characteristics of signals of analog drive signal SD is to be relevant to the capacitance sensor 21 to show that signal is strong
Foundation is reacted on by degree SS (being relevant to the distance of the active stylus 1 and the contact panel 60), the contact panel 60
The signal intensity that analog drive signal SD is sensed judges the distance of the active stylus 1 and the contact panel 60,
And then simulate the change of style of writing weight or other style of writing situations.It should be noted that, the control unit 50 can also fix simulation drive
The dutycycle D and amplitude A3 of dynamic signal SD, still may achieve and differentiate the active stylus 1 and the hand 5 and multi-point touch
Function.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Know those skilled in the art and work as and various corresponding changes and deformation, but these corresponding changes and change can be made according to the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (10)
1. a kind of active stylus, it is characterised in that suitable for a contact panel, the contact panel includes and multiple drives electricity
Pole and multiple induction electrodes, each driving electrodes are used to send a panel drive signal, and those induction electrodes are used to receive this
Panel driving signal, and the active stylus includes：
One receiving element, is used to receive the panel driving signal；
One sensing module, couples the receiving element, and the sensing module is used to react on the panel driving signal and draw the panel
The characteristics of signals of drive signal；
One signal generator, is used to produce an analog drive signal；
One driving element, couples the signal generator, and the driving element is used to send the analog drive signal；And
One control unit, couples the sensing module and the signal generator, the control unit according to the panel driving signal letter
Number characteristic and pass through the signal generator and produce the analog drive signal synchronous with the panel driving signal and with phase.
2. active stylus as claimed in claim 1, it is characterised in that the characteristics of signals of the panel driving signal includes
One signal intensity, the sensing module includes a capacitance sensor and couples the receiving element and the control unit, the capacitance sensing
Device reacts on the panel driving signal and draws corresponding signal intensity, and the control unit determines the mould according to the signal intensity
Intend the characteristics of signals of drive signal.
3. active stylus as claimed in claim 1, it is characterised in that the analog drive signal is a pulse wave signal, and
The characteristics of signals of the analog drive signal includes an a duty when amplitude at least one of which.
4. active stylus as claimed in claim 1, it is characterised in that the characteristics of signals of the panel driving signal includes
One panel timing information, the characteristics of signals of the analog drive signal includes a simulated timing diagrams information, and the sensing module includes
One amplifying circuit couples the receiving element and the control unit, and the amplifying circuit reacts on the panel driving signal and to export one defeated
Go out signal, interrogated when the control unit draws the panel timing information, and the control unit according to the panel according to the output signal
Information determines the simulated timing diagrams information of the analog drive signal.
5. active stylus as claimed in claim 4, it is characterised in that the timing information is a frequency, and the control list
Unit draws two adjacent peaks of the panel driving signal according to the output signal, and the control unit simultaneously calculates two adjacent peak
Time difference is drawing the frequency.
6. a kind of control method of active stylus, it is characterised in that the active stylus is applied to a contact panel, should
Contact panel includes multiple driving electrodes and multiple induction electrodes, and each driving electrodes are used to send panel driving letter
Number, those induction electrodes are used to receive the panel driving signal, and the control method includes：
Receive the panel driving signal；
Obtain the characteristics of signals of the panel driving signal；
The analog-driven synchronous with the panel driving signal and with phase is produced according to the characteristics of signals of the panel driving signal
Signal；And
Send the analog drive signal.
7. the control method of active stylus as claimed in claim 6, it is characterised in that the signal of the panel driving signal
Characteristic includes a signal intensity, and includes the step of obtain the characteristics of signals of the panel driving signal：
React on the panel driving signal and draw corresponding signal intensity；And
The characteristics of signals of the analog drive signal is determined according to the signal intensity.
8. the control method of active stylus as claimed in claim 7, it is characterised in that the analog drive signal is an arteries and veins
Ripple signal, and the characteristics of signals of the analog drive signal includes an a duty when amplitude at least one of which.
9. the control method of active stylus as claimed in claim 6, it is characterised in that the signal of the panel driving signal
Characteristic includes a panel timing information, and the characteristics of signals of the analog drive signal includes a simulated timing diagrams information, and obtains
The step of characteristics of signals for going out the panel driving signal, includes：
The panel timing information is drawn according to the panel driving signal；And
The simulated timing diagrams information that information determines the analog drive signal is interrogated during according to the panel.
10. the control method of active stylus as claimed in claim 9, it is characterised in that the timing information is a frequency,
And include the step of draw the panel timing information according to the panel driving signal：
Determine two adjacent peaks of the panel driving signal；And
The time difference of two adjacent peak is calculated to draw the frequency.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710092494.4A CN106843545A (en) | 2017-02-21 | 2017-02-21 | Active stylus and its control method |
| US15/599,357 US20180239449A1 (en) | 2017-02-17 | 2017-05-18 | Active stylus and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710092494.4A CN106843545A (en) | 2017-02-21 | 2017-02-21 | Active stylus and its control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106843545A true CN106843545A (en) | 2017-06-13 |
Family
ID=59133960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710092494.4A Pending CN106843545A (en) | 2017-02-17 | 2017-02-21 | Active stylus and its control method |
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| CN (1) | CN106843545A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109271051A (en) * | 2017-07-17 | 2019-01-25 | 矽统科技股份有限公司 | Capacitance touch control system and its method for sensing |
| CN110231877A (en) * | 2018-03-05 | 2019-09-13 | 焕德科技股份有限公司 | Touching signals processing method and stylus |
| CN110794977A (en) * | 2018-08-03 | 2020-02-14 | 矽统科技股份有限公司 | Bidirectional active stylus and sensing system |
| CN110869898A (en) * | 2018-03-08 | 2020-03-06 | 昆山龙腾光电股份有限公司 | Multi-capacitance pen identification method, touch control unit, touch panel and system |
| CN113126810A (en) * | 2019-12-30 | 2021-07-16 | 禾瑞亚科技股份有限公司 | Transmitter, touch processing device and processing method thereof and electronic system |
| CN113885719A (en) * | 2021-09-30 | 2022-01-04 | 惠州Tcl移动通信有限公司 | Communication method of electronic pen |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109271051A (en) * | 2017-07-17 | 2019-01-25 | 矽统科技股份有限公司 | Capacitance touch control system and its method for sensing |
| CN109271051B (en) * | 2017-07-17 | 2021-09-28 | 矽统科技股份有限公司 | Capacitive touch system and sensing method thereof |
| CN110231877A (en) * | 2018-03-05 | 2019-09-13 | 焕德科技股份有限公司 | Touching signals processing method and stylus |
| CN110869898A (en) * | 2018-03-08 | 2020-03-06 | 昆山龙腾光电股份有限公司 | Multi-capacitance pen identification method, touch control unit, touch panel and system |
| CN110869898B (en) * | 2018-03-08 | 2023-08-29 | 昆山龙腾光电股份有限公司 | Multi-capacitance pen identification method, touch control unit, touch panel and system |
| CN110794977A (en) * | 2018-08-03 | 2020-02-14 | 矽统科技股份有限公司 | Bidirectional active stylus and sensing system |
| CN113126810A (en) * | 2019-12-30 | 2021-07-16 | 禾瑞亚科技股份有限公司 | Transmitter, touch processing device and processing method thereof and electronic system |
| CN113885719A (en) * | 2021-09-30 | 2022-01-04 | 惠州Tcl移动通信有限公司 | Communication method of electronic pen |
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Application publication date: 20170613 |