CN108388357A - A kind of control system of capacitance plate detection writer be passive electrical magnetic pen - Google Patents
A kind of control system of capacitance plate detection writer be passive electrical magnetic pen Download PDFInfo
- Publication number
- CN108388357A CN108388357A CN201810239899.0A CN201810239899A CN108388357A CN 108388357 A CN108388357 A CN 108388357A CN 201810239899 A CN201810239899 A CN 201810239899A CN 108388357 A CN108388357 A CN 108388357A
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- Prior art keywords
- writer
- magnetic pen
- passive electrical
- electrical magnetic
- energy
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
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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)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses the control system that a kind of capacitance plate detects writer be passive electrical magnetic pen, system mainly contains electromagnetic energy emitting portion, time writer energy receptor portions, electromagnetic energy transmitting and time writer energy-sensitive algorithm, time writer pressure sensitive algorithm etc..By the system, may be implemented writer be passive electrical magnetic pen driving and induction panel being integrated into finger touch panel system, to realize single-chip list induction panel while support finger and the detection with pressure sensitive writer be passive electrical magnetic pen.It wherein contains to the energy driver circuit with pressure sensitive writer be passive electrical magnetic pen, using the scheme of touch panel induced electricity magnetic pen and the algorithm of operation time writer coordinate and pressure.
Description
Technical field
The present invention relates to display screen technology field, the control system of specifically a kind of capacitance plate detection writer be passive electrical magnetic pen.
Background technology
Capacitance touching control screen is generally plated on glass as electrically conducting transparent material using ITO (tin indium oxide) or special substance
Plastic film on, form capacity effect, become by measuring finger touch or being close to the capacitance that generates in the ITO materials of screen body
Change, to determine whether there is finger touch, and calculates the position coordinates of touch-control by scan mode.
In order to realize the application for extending pen in electronic equipment input mode, there is the induction mode of time writer.Electromagnetism
Pen is generally divided into active time writer and passive-type time writer.Active time writer itself is actively sent out with energy sources such as batteries
Energy is penetrated, is incuded for touch screen or electromagnetic coil, due to needing itself to carry out charging with power supply and volume is larger,
Cost is also higher.
Passive-type writer be passive electrical magnetic pen uses the resonance circuit of a LC, is used for induced electricity magnetic wave, and generate self induction electromotive force,
To generate energy, and the time writer on pen tip emitted energy, such as Samsung Galaxy Note.But traditional technology needs
Emitted using dedicated electromagnetic coil and the coordinate of induced electricity magnetic pen, cost are higher.
The scheme of the finger touch of existing ITO touch screens detection at present mainly have self-tolerant (self-capacitance) with
Two kinds of mutual capacitance type (mutal-capacitance), wherein self-tolerant is that each channel emits charging signals, also receives acquisition
Signal, by detecting the variation of the capacitance of each electrode relative to ground to determine whether touch-control, and mutual capacitance type is then divided into hair
Penetrate signal path TX and acquisition receiving channel RX, the variation of the capacitance between each pair of combination by detecting TX and RX channels come
Judge whether there is touch-control.
Invention content
The technical problem to be solved in the present invention is to provide the control systems that a kind of capacitance plate detects writer be passive electrical magnetic pen, to solve
The problem of being mentioned in background technology.
To achieve the above object, the present invention provides the following technical solutions：
A kind of control system of capacitance plate detection writer be passive electrical magnetic pen, including to be felt by the programmable transmitting of touch chip
It should be able to measure to the band pressure sensitive writer be passive electrical magnetic pen energy transmitting circuit of writer be passive electrical magnetic pen, for detecting band pressure sensitive passive electrical
The induction panel of the inductive energy of magnetic pen, finger touch induction panel, for collecting union band pressure sensitive writer be passive electrical magnetic pen
Algorithm and pressure sensitive algorithm.
Further scheme as the present invention：Energy transmitting circuit, using integrated design, by the hair of touch chip itself
Channel (TX) is penetrated to carry out programmable energy transmitting, the frequency of transmitting can be adjusted by software algorithm, the energy of transmitting according to
The sensing requirement of screen size and time writer, rear end increase full-bridge chip and increase emitted energy with push pull mode.
Further scheme as the present invention：It is passive that use feeling answers the sensing panel of finger touch to carry out induction band pressure sensitive
The inductive energy of time writer.
Further scheme as the present invention：It collects algorithm of the union with pressure sensitive writer be passive electrical magnetic pen and operates in touch-control
Chip interior realizes finger induction and writer be passive electrical magnetic pen induction integration.
Further scheme as the present invention：Algorithm of the union with pressure sensitive writer be passive electrical magnetic pen is collected in finger sensing
The touch-control stage uses mutual tolerance induction mode, in the coupling energy of induction band pressure sensitive writer be passive electrical magnetic pen using appearance induction side certainly
Formula.
Further scheme as the present invention：Algorithm of the union with pressure sensitive writer be passive electrical magnetic pen is collected to control in real time
The TX tranmitting frequencies of touch chip processed, the energy coupled by induced electricity magnetic pen come the instantaneous induction frequencies of operation time writer, from
And realize the detection to pressure sensitive.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention by writer be passive electrical magnetic pen drive and induction panel collection
At to finger touch panel, is realized using mutual tolerance design when detecting finger and support to refer to calculation process more, in detection electromagnetism
It is switched to when pen and reaches higher sensitivity and accuracy from molar formula, eliminate the electromagnetic wire for induced electricity magnetic pen
Circle realizes that touch-control finger and the ITO of time writer induction share, system cost is greatly saved.
Description of the drawings
Fig. 1 is the Energy-emitting portion schematic diagram of time writer induction system.
Fig. 2 is from appearance electrode inductance capacitance pen tip schematic diagram.
Fig. 3 is time writer induction system schematic diagram.
In figure：1- transmitting coils, 2-EMR time writers.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
- 3 are please referred to Fig.1, a kind of scheme incuding passive passive-type time writer using ITO touch screens, in detection finger
When using mutual tolerance design realize support mostly finger calculation process, be switched to when detecting time writer and reach from molar formula
Higher sensitivity and accuracy eliminate the electromagnetic coil for induced electricity magnetic pen, realize that touch-control finger incudes with time writer
ITO share, system cost is greatly saved.
Passive passive-type time writer uses the resonance circuit induced electricity magnetic wave of LC, and in pen tip emitted energy, ITO touch screens
Incude pen tip by certain algorithm.Wherein pressure-induced capacitance is used for adjusting frequency of oscillation.The representative value of inductance is uH ranks, example
Such as 50uH, and capacitance range in parallel is in nF ranks, such as 1.6nf or so, and such frequency range, can be in 550KHz or so
Variation range is adjusted according to the ratio of practical pressure sensitivity respective frequencies.
System proposed by the invention mainly contains energy transmitting circuit, induction of the ITO touch screens to passive time writer,
And the detection algorithm of system processing.
Energy transmitting circuit requirement in present system is to writer be passive electrical magnetic pen (Electro Magnetic Resonance
Pen) electromagnetic wave energy provided needs to be centered around in frequency range certain around the characteristic frequency of time writer, and energy demand reaches
To certain grade so that time writer can incude enough energy to be detected by ITO touch screens.Due to using stylus with
The control IC integrated designs of touch screen need capacitance touching control IC to provide a channel and are used for emitting the energy signal in design.
Signal frequency range is determined according to the centre frequency of Eco-power writer be passive electrical magnetic pen, such as the 550KHz that front is calculated, one
As can make 400~600KHz ranges.The transmission channel of IC needs the coil by being attached on capacitance plate to realize electromagnetism
The output of wave energy.
Coil is generally coiled into the internal layer attached in touch screen, or the inside configuration week mounted on equipment using enameled wire
Side is either coiled into or is used using FPC cablings in the stack-design of touch module in one layer of ITO cablings periphery or increase
Film uses silver paste line cabling, is allowed to reach a fixing turn according to frame, may need the long copper on silver paste line for impedance needs
To reduce impedance.The impedance of coil should control 50ohm once, preferably in 10ohm or less.Its internal loss is smaller in this way,
The electric energy of output can preferably be converted to electromagnetic wave energy and radiate.
In addition, general capacitance touching control IC is low-power chip, analog output voltage is 3V or so, is output to the energy of coil
Amount is weaker, needs to be pressurized with positive negative sense by being pressurized chip, for example, can with AAT4901 or LBQMN471 come bidirectional booster,
Peak-to-peak value can promote 10V or so.Emitting portion is as shown in Figure 1：
The integrated design system schema that the present invention proposes incudes the coupling of writer be passive electrical magnetic pen using ITO touch screens itself
Energy is closed, and unconventional is incuded using special coil.Because after time writer inductive energy, will produce field coupling and arrive
On the induction electrode of ITO touch screens, therefore very high signal energy induction, letter can be obtained to incude using self-capacitance mode
It makes an uproar relatively high.Due to the effect of induced electromotive force, pen tip is caused to possess instantaneous charge, pen tip is touched from when holding electrode, produced
Raw higher capacity effect variation, it is sufficient to chip be allowed to determine the generation of pen tip touch-control.Schematic diagram is as shown in Figure 2.
It can entirely emit frequency range transmitting electromagnetic wave in chip IC, energy sensed by time writer, therefore generate in pen tip
Voltage change with the energy variation of induction, when the resonant frequency of the frequency of electromagnetic wave and LC oscillating circuits is completely the same,
The electromotive force of induction is maximum, and the induced voltage that pen tip generates is maximum, and the energy coupled on the electrode is also most strong.Therefore capacitance plate
Frequency sweep mode may be used to detect the natural resonance frequency point of time writer, i.e. corresponding energy highest in electrode induction
Point.And the LC resonance frequency of time writer can also change with the variation of built-in pressure-induced capacitance, therefore pressure sensitivity may be implemented and arrive
The one-to-one relationship of resonance frequency point, to detect the pressure sensitivity effect of time writer.
Overall emission and the system structure of induction can (ITO pattern being applicable in be not limited only in diagram as shown in Figure 3
Pattern).
Capacitance touching control IC needs the processing that time writer is carried out in each frame scan in time writer touch control detection.Mainly
The content of processing includes：
In the signal for the TX channel emission assigned frequencies that coil is connect；
Signal is acquired on row and column channel, and judges whether to be more than threshold value；
Change tranmitting frequency, repeated sampling；
Go out the vertex position of the signal of all frequency points more than threshold value, the as frequency point of peak signal by interpolation calculation；
Calculate the X of this point, Y coordinate, and its corresponding frequency point is the resonance frequency point of time writer, by linear transformation,
The pressure sensitivity information that can be converted time writer is supplied to system application layer to use；
Therefore usually software needs design and actual tests according to system, defines several parameters, including：
Tx_freq_lo, tx_freq_hi, the frequency range of the transmitted waveform on the two parameter definitions coil, generally
It is subject to the resonant frequency range of time writer, but the error of the capacitance and inductance in view of time writer, can suitably relax, but such as
Fruit is too wide, may lead to the overlong time of Scanning Detction；
Emrpen_thresh_hi, emrpen_thresh_lo work as inspection for defining the thresholding of Schmidt's effect
When the energy of survey is higher than emrpen_thresh_hi, it is just deemed likely to touch-control, has been considered to count, and only energy later
Amount can be just dropped less than emrpen_thresh_lo；
The energy that emrpen_thresh_report defines only vertex is more than the value, and seat can be just reported to upper layer application
Mark, otherwise it is assumed that being noise；
Emrpen_pressure_scale is used for linearly turning to center resonant frequency the parameter of pressure sensitivity signal.
Claims (5)
1. a kind of control system of capacitance plate detection writer be passive electrical magnetic pen, which is characterized in that including can be compiled by touch chip
The transmitting inductive energy of journey is to the band pressure sensitive writer be passive electrical magnetic pen energy transmitting circuit of writer be passive electrical magnetic pen, for detection with pressure
Incude the induction panel of inductive energy of writer be passive electrical magnetic pen, finger touch induction panel, for collecting union band pressure sensitive
The algorithm and pressure sensitive algorithm of writer be passive electrical magnetic pen.
2. a kind of control system of capacitance plate detection writer be passive electrical magnetic pen according to claim 1, which is characterized in that the band
Pressure sensitive writer be passive electrical magnetic pen energy transmitting circuit uses integrated design, by the transmission channel of touch chip itself come carry out can
The frequency of the energy transmitting of programming, transmitting is adjustable, and the energy of transmitting is according to the sensing requirement of screen size and time writer, rear end
Increase full-bridge chip and emitted energy is increased with push pull mode.
3. a kind of control system of capacitance plate detection writer be passive electrical magnetic pen according to claim 1, which is characterized in that use feeling
The sensing panel of finger touch is answered to carry out the inductive energy of induction band pressure sensitive writer be passive electrical magnetic pen.
4. a kind of control system of capacitance plate detection writer be passive electrical magnetic pen according to claim 1, which is characterized in that collect simultaneously
Algorithm of the operation with pressure sensitive writer be passive electrical magnetic pen uses mutual tolerance induction mode in the finger sensing touch-control stage, in induction band pressure
Using appearance induction mode certainly when incuding the coupling energy of writer be passive electrical magnetic pen.
5. a kind of control system of capacitance plate detection writer be passive electrical magnetic pen according to claim 1, which is characterized in that collect simultaneously
Algorithm of the operation with pressure sensitive writer be passive electrical magnetic pen can pass through induced electricity magnetic pen with the TX tranmitting frequencies of real-time control touch chip
The energy of coupling carrys out the instantaneous induction frequencies of operation time writer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810239899.0A CN108388357A (en) | 2018-03-22 | 2018-03-22 | A kind of control system of capacitance plate detection writer be passive electrical magnetic pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810239899.0A CN108388357A (en) | 2018-03-22 | 2018-03-22 | A kind of control system of capacitance plate detection writer be passive electrical magnetic pen |
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| Publication Number | Publication Date |
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| CN108388357A true CN108388357A (en) | 2018-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810239899.0A Pending CN108388357A (en) | 2018-03-22 | 2018-03-22 | A kind of control system of capacitance plate detection writer be passive electrical magnetic pen |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022257561A1 (en) * | 2021-06-10 | 2022-12-15 | Tcl通讯（宁波）有限公司 | Stylus optimization method and system, mobile terminal, and computer readable storage medium |
| CN117369671A (en) * | 2023-09-28 | 2024-01-09 | 汉王科技股份有限公司 | Touch panel, touch system and control method of touch panel |
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| CN102253774A (en) * | 2010-05-21 | 2011-11-23 | 汉王科技股份有限公司 | Information input device and method with function of eliminating mutual interference among sensing signals |
| CN202472600U (en) * | 2012-01-17 | 2012-10-03 | 深圳海棠通信技术有限公司 | Display device with electromagnetic touch and capacitive touch |
| CN103593100A (en) * | 2013-05-21 | 2014-02-19 | 敦泰科技有限公司 | Capacitive screen touch control method and capacitive screen touch control equipment |
| CN104216538A (en) * | 2014-08-26 | 2014-12-17 | 汉王科技股份有限公司 | Passive capacitance pen, capacitive touch panel, capacitive touch device and interactive method |
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2018
- 2018-03-22 CN CN201810239899.0A patent/CN108388357A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253774A (en) * | 2010-05-21 | 2011-11-23 | 汉王科技股份有限公司 | Information input device and method with function of eliminating mutual interference among sensing signals |
| CN202472600U (en) * | 2012-01-17 | 2012-10-03 | 深圳海棠通信技术有限公司 | Display device with electromagnetic touch and capacitive touch |
| CN103593100A (en) * | 2013-05-21 | 2014-02-19 | 敦泰科技有限公司 | Capacitive screen touch control method and capacitive screen touch control equipment |
| CN104216538A (en) * | 2014-08-26 | 2014-12-17 | 汉王科技股份有限公司 | Passive capacitance pen, capacitive touch panel, capacitive touch device and interactive method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022257561A1 (en) * | 2021-06-10 | 2022-12-15 | Tcl通讯（宁波）有限公司 | Stylus optimization method and system, mobile terminal, and computer readable storage medium |
| CN117369671A (en) * | 2023-09-28 | 2024-01-09 | 汉王科技股份有限公司 | Touch panel, touch system and control method of touch panel |
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Application publication date: 20180810 |