CN109271051A - Capacitance touch control system and its method for sensing - Google Patents
Capacitance touch control system and its method for sensing Download PDFInfo
- Publication number
- CN109271051A CN109271051A CN201710580107.1A CN201710580107A CN109271051A CN 109271051 A CN109271051 A CN 109271051A CN 201710580107 A CN201710580107 A CN 201710580107A CN 109271051 A CN109271051 A CN 109271051A
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- Prior art keywords
- signal
- sensing
- control system
- touch
- panel
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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
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- 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
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
-
- 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
Abstract
This announcement is related to a kind of capacitance touch control system and its method for sensing, which includes a touch panel；One touch chip；And an active pen, including a receiving unit, a transmission unit, a control unit and a pressure-sensing component.The control unit controls the transmission unit according to a sensing signal and exports a driving signal.The pressure-sensing component detects a pressure signal, which responds after this presses during signal delay one and export a voltage signal.In the capacitance touch control system and its method for sensing, the active pen and the touch panel do not need to carry out Joint and partnership.
Description
Technical field
This announcement is related to touch technology, more particularly to a kind of capacitance touch control system and its method for sensing.
Background technique
With the development of touch panel (Touch Panel, TP), the periphery commodity of touch panel are also developed therewith gradually,
Active pen (active pen) is the one of them of periphery commodity.There is a kind of active pen to have the function of pressure sensitivity, active pen at present
The pressure sensitivity value sensed is sent to touch panel through bluetooth or other wireless communication standards, however will be sensed in active pen
Pressure sensitivity value is sent to before touch panel, and active pen must carry out Joint and partnership with touch panel, so that this kind of active pen makes
With and it is inconvenient.
Therefore it needs to propose a kind of solution aiming at the problem that above-mentioned prior art.
Summary of the invention
This announcement provides a kind of capacitance touch control system and its method for sensing, can solve the problems in prior art.
The capacitance touch control system of this announcement includes a touch panel；One touch chip, for periodically to the touch-control
Panel exports a panel driving signal；And an active pen, including a receiving unit, a transmission unit, a control unit and a pressure
Power sensing component.The receiving unit incudes the panel driving signal and generates a sensing signal, and the control unit is according to the pen sense
It surveys signal and controls the transmission unit one driving signal of output, which detects one of the active pen according to this driving signal
The position of touching.The pressure-sensing component is sent to the control list according to one pressure signal of the touch detection and by this pressure signal
Member, the control unit respond after this presses during signal delay one and export a voltage signal, which penetrates the transmission unit
And the touch panel is sent to the touch chip.
In the method for sensing of the capacitance touch control system of this announcement, which includes a touch panel, one
Touch chip and an active pen, the active pen include a receiving unit, a transmission unit, a control unit and a pressure-sensing
Component, the method for sensing of the capacitance touch control system include that the receiving unit incudes the panel driving signal and generates a sensing letter
Number；The control unit controls the transmission unit according to this sensing signal and exports a driving signal；The touch chip is according to the pen
Driving signal detects the position of one of active pen touching；The pressure-sensing component is according to one pressure signal of the touch detection and incites somebody to action
This presses signal to be sent to the control unit；The control unit, which responds, exports voltage letter after this presses during signal delay one
Number；And the voltage signal is sent to the touch chip through the transmission unit and the touch panel.
In the capacitance touch control system and its method for sensing of this announcement, active pen does not need to carry out online match with touch panel
It is right.Furthermore active pen can synchronously transmit a driving signal (for detecting the position of touching), and asynchronously transmission voltage letter
Number (be used for detecting pressure inductance value).
For the above content of this announcement can be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate institute's accompanying drawings, makees
Detailed description are as follows:
Detailed description of the invention
Fig. 1 shows the schematic diagram of a touch panel.
Fig. 2 shows the schematic diagram that a coupled capacitor is formed between one of touch panel driving electrodes and a sensing electrode.
Fig. 3 shows the schematic diagram of the coupled capacitor of the touch panel and the relationship of a ground capacity.
Fig. 4 shows the schematic diagram of the panel driving signal and sensing signal that measure when not having finger close.
Fig. 5 shows the schematic diagram of the panel driving signal and sensing signal that measure when finger is close.
Fig. 6 shows the schematic diagram of active pen.
Fig. 7 shows the schematic diagram of the capacitance touch control system according to one embodiment of this announcement.
Fig. 8 shows position and a pressure signal according to one touching of the capacitance touch control system of one embodiment of this announcement detecting
Waveform diagram.
Fig. 9 shows the flow chart of the method for sensing of the capacitance touch control system according to one embodiment of this announcement.
Specific embodiment
To keep the purpose, technical solution and effect of this announcement clearer, clear, develop simultaneously embodiment pair referring to schema
This announcement is further described.It should be appreciated that specific embodiment described herein is only to explain that this announcement, this announcement are said
The word " embodiment " used in bright book means serving as example, example or illustration, is not used to limit this announcement.In addition, originally taking off
Showing the article " one " used in specification and appended claim generally can be interpreted to mean " one or more
It is a ", it or can understand from context determine singular unless specified otherwise.Also, in institute's accompanying drawings, structure, function phase
Like or identical component be to be indicated with same components labels.
Referring to Fig. 1, Fig. 1 shows the schematic diagram of a touch panel 10.The touch panel 10 can be a condenser type
(Capacitive Touch Panel) touch panel.
As shown in Figure 1, the touch panel 10 generally comprises several electrodes arranged in arrays and connects these electrodes
Conducting wire, these electrodes are that tin indium oxide (Indium Tin Oxide, ITO) is made, and the shape of these electrodes is usually item
Shape (Bar) or diamond shape (Diamond).In mutual capacitance (Mutual Capacitance) framework, these electrodes include several
Driving electrodes 12 (as shown in Figure 2) and several sensing electrodes 14 (as shown in Figure 2), correspondingly, conducting wire also includes several
Conducting wire 16 and several sensing conducting wires 18 are driven, these drivings 16, conducting wire do not connect these driving electrodes 12, these sensings
18, conducting wire do not connect these sensing electrodes 14.The driving method of mutual capacitance framework is sequentially through these driving conducting wires 16 to this
A little driving electrodes 12 apply a panel driving signal TP_TX (TP represents Touch Panel, i.e. touch panel), the panel driving
Signal TP_TX is usually a pulse signal, correspondingly, sequentially reads and feels from these sensing electrodes 14 through these sensing conducting wires 18
Survey signal TP_RX.
It please refers to Fig.1 to Fig.3, Fig. 2 shows shape between one of the touch panel 10 driving electrodes 12 and a sensing electrode 14
At the schematic diagram of a coupled capacitor Cm, Fig. 3 shows the relationship of the coupled capacitor Cm and a ground capacity Cg of the touch panel 10
Schematic diagram.
As shown in Figure 1 to Figure 3, coupled capacitor Cm is formed between the driving electrodes 12 and the sensing electrode 14.Such as Fig. 1 and figure
Shown in 3, ground capacity Cg is formed between the sensing electrode 14 and a ground terminal 20.When finger (or the like) close to when can make
At the change of coupled capacitor Cm, and then change the sensing signal TP_RX measured from the sensing electrode 12.
Fig. 1 to Fig. 5 is please referred to, Fig. 4 shows the panel driving signal TP_TX and sensing measured when not having finger close
The schematic diagram of signal TP_RX, Fig. 5 show the panel driving signal TP_TX and sensing signal TP_RX measured when finger is close
Schematic diagram.
As shown in Figure 4 and Figure 5, the coupled capacitor Cm when finger is close, between the driving electrodes 12 and sensing electrode 14 of Fig. 2
It is affected and reduces, therefore the sensing signal TP_RX measured through sensing conducting wire 18 from sensing electrode 14 also reduces, Fig. 1
Touch chip 22 panel driving signal TP_TX is sequentially applied to each driving electrodes 12 of the touch panel 10, and sequentially
The sensing signal TP_RX in each sensing electrode 14 is read, the position of touching can be parsed.
Referring to Fig. 6, it is the schematic diagram for showing active pen 30.Active pen 30 (also known as active stylus or capacitor
Pen) it can produce the effect of the similar touch panel 10 that Fig. 1 is touched with finger, that is, change the driving electrodes 12 and sensing of Fig. 2
The capacitance of coupled capacitor Cm between electrode 14.The active pen 30 include a shell 32, a receiving unit 34, a transmission unit 36, with
And a pressure-sensing component 38, the shell 32 have a hollow structure, the receiving unit 34 be set to one end of the shell 32 to
Outer extended spot, the receiving unit 34 are used to receive the panel driving signal TP_TX of Fig. 1, the transmission unit 36 be set to the shell 32 it
The inside at the end simultaneously is used to generate a driving signal according to the panel driving signal TP_TX, this driving signal penetrates the pressure
Power sensing component 38 is sent to the sensing electrode 14 of Fig. 2, changes be formed by between driving electrodes 12 and sensing electrode 14 whereby
Coupled capacitor Cm detects for the touch chip 22 of Fig. 1.
In addition, the pressure-sensing component 38 detects one when the touch panel 10 of 38 hookup 1 of pressure-sensing component
Signal is pressed to obtain the active pen 30 in pressure sensitivity value one of on the touch panel 10 for the touch chip 22.
Fig. 1 to Fig. 8 is please referred to, Fig. 7 shows the schematic diagram of the capacitance touch control system according to one embodiment of this announcement, Fig. 8
Display is according to the position of one touching 50 of the capacitance touch control system of one embodiment of this announcement detecting and the waveform diagram of a pressure signal.
The capacitance touch control system includes the touch panel 10, the touch chip 22 and the active pen 30.
In a position detecting mode, the touch chip 22 be electrically connected to the touch panel 10 and for periodically to
The touch panel 10 exports panel driving signal TP_TX, and the receiving unit 34 of the active pen 30 incudes the panel driving signal
TP_TX simultaneously generates a sensing signal PEN-RX, and one of the active pen 30 control unit 40 is according to this sensing signal PEN-RX
Size control the transmission unit 36 export a driving signal PEN_TX (i.e. the signal of T1 when Fig. 8), this driving signal
PEN_TX is sent to the sensing electrode 14 of Fig. 2 through the pressure-sensing component 38, changes driving electrodes 12 and sensing electrode whereby
Coupled capacitor Cm is formed by between 14 so that the touch chip 22 detects the position (i.e. coordinate) of the touching 50 of the active pen 30.
For example, this driving signal PEN_TX is proportional to this sensing signal PEN-RX, i.e. this sensing signal
PEN-RX is bigger, this driving signal PEN_TX is also bigger, this is to keep voltage change shape close to simulate finger touching
Like Gaussian curve, to calculate the coordinate of the touching 50.
In the position after sense mode, which can switch to a pressure detection mode, when the pressure-sensing group
When generating the touching 50 on the touch panel 10, which detects a pressure signal and press the pen believes part 38
Number it is sent to the control unit 40 of the active pen 30, one electricity of output after which responds during pen pressure signal delay one
It presses signal (i.e. the signal of T2 when Fig. 8), which is sent to the touching through the transmission unit 36 and the touch panel 10
Control chip 22.It is not limiting as, can be believed (i.e. when Fig. 8 between T1 and period T2) according to the panel driving during above-mentioned delay
The driving frequency adjustment or design of number TP_TX.
In prior art, active pen, which must carry out Joint and partnership with touch panel, could transmit pressure sensitivity value, the electricity of this announcement
The characteristics of appearance formula touch-control system, is to transmit the voltage signal, therefore active pen 30 and touch surface through the pressure-sensing component 38
Plate 10 does not need to carry out Joint and partnership.Furthermore it can be according to appropriately designed control of driving frequency of panel driving signal TP_TX
Cell delay exports the voltage signal during this period, therefore will not influence and transmit this driving signal PEN_ in position detecting mode
TX, that is to say, that in position detecting mode, which can synchronously transmit this driving signal PEN_TX and (be used for
Detect the position of touching), in pressure detection mode, which then asynchronously transmits the voltage signal (for detecting pressure
Inductance value).
More particularly, after this presses signal to be sent to the control unit 40, which can press signal for the pen
It is simulated to number and is converted, export voltage letter further according to the numerical values recited (representing the size of pen pressure signal) after conversion
Number, which can be a square wave or other waveforms, such as triangular wave, sawtooth wave etc..
In an embodiment, the time span which exports the voltage signal is proportional to this and presses the big of signal
It is small, that is to say, that when the pen presses signal bigger, the time span of the voltage signal is longer.
In an embodiment, the frequency of the voltage signal is identical as the driving frequency of panel driving signal TP_TX.In another
In one embodiment, the frequency of the voltage signal can be different from the driving frequency of panel driving signal TP_TX.
Referring to Fig. 9, Fig. 9 shows the process of the method for sensing of the capacitance touch control system according to one embodiment of this announcement
Figure.
The capacitance touch control system includes a touch panel, a touch chip and an active pen, which includes one
Receiving unit, a transmission unit, a control unit and a pressure-sensing component, the method for sensing of the capacitance touch control system include
Following operation.
In block S100, which incudes the panel driving signal and generates a sensing signal.
In block S102, which controls the transmission unit according to this sensing signal and exports a driving signal.It should
Driving signal is proportional to this sensing signal.
In block S104, which detects the position of one of active pen touching according to this driving signal.
In block S106, which is sent to according to one pressure signal of the touch detection and by this pressure signal
The control unit.More particularly, after this presses signal to be sent to the control unit, which carries out pen pressure signal
Simulation to number is converted, and exports the voltage signal further according to the numerical values recited after conversion.
In block S108, which responds after this presses during signal delay one and exports a voltage signal.During this period
It is adjusted according to the driving frequency of the panel driving signal.The time span that the control unit exports the voltage signal is proportional to the pen
Press the size of signal.The frequency of the voltage signal is identical as the driving frequency of the panel driving signal.
In block S110, which is sent to the touch chip through the transmission unit and the touch panel.
In the capacitance touch control system and its method for sensing of this announcement, active pen does not need to carry out online match with touch panel
It is right.Furthermore active pen can synchronously transmit a driving signal (for detecting the position of touching), and asynchronously transmission voltage letter
Number (be used for detecting pressure inductance value).
Although above preferred embodiment is not to limit in conclusion this announcement is disclosed above with preferred embodiment
This announcement is made, those skilled in the art can make various changes and profit in the spirit and scope for not departing from this announcement
Decorations, therefore the protection scope of this announcement subjects to the scope of the claims.
Claims (12)
1. a kind of capacitance touch control system characterized by comprising
One touch panel；
One touch chip, for periodically exporting a panel driving signal to the touch panel；And
One active pen, including a receiving unit, a transmission unit, a control unit and a pressure-sensing component,
Wherein the receiving unit incudes the panel driving signal and generates a sensing signal, which senses according to the pen believes
It number controls the transmission unit and exports a driving signal, which detects one of the active pen according to this driving signal and touch
Position,
The pressure-sensing component is sent to the control unit according to one pressure signal of the touch detection and by this pressure signal, the control
Unit processed responds after this presses during signal delay one and exports a voltage signal, which penetrates the transmission unit and the touch-control
Panel is sent to the touch chip.
2. capacitance touch control system according to claim 1, which is characterized in that this driving signal is proportional to this sensing
Signal.
3. capacitance touch control system according to claim 1, which is characterized in that during this period according to the panel driving signal
Driving frequency adjustment.
4. capacitance touch control system according to claim 1, which is characterized in that this presses signal to be sent to the control unit
Afterwards, which simulates this pressure signal to number and converts, and exports the voltage further according to the numerical values recited after conversion
Signal.
5. capacitance touch control system according to claim 1, which is characterized in that the control unit exports the voltage signal
Time span is proportional to the size that this presses signal.
6. capacitance touch control system according to claim 1, which is characterized in that the frequency of the voltage signal and the panel drive
The driving frequency of dynamic signal is identical.
7. a kind of method for sensing of capacitance touch control system, which is characterized in that the capacitance touch control system include a touch panel,
One touch chip and an active pen, the active pen include a receiving unit, a transmission unit, a control unit and a feeling of stress
Component is surveyed, the method for sensing of the capacitance touch control system includes:
The receiving unit incudes the panel driving signal and generates a sensing signal；
The control unit controls the transmission unit according to this sensing signal and exports a driving signal；
The touch chip detects the position of one of active pen touching according to this driving signal；
The pressure-sensing component is sent to the control unit according to one pressure signal of the touch detection and by this pressure signal；
The control unit responds after this presses during signal delay one and exports a voltage signal；And
The voltage signal is sent to the touch chip through the transmission unit and the touch panel.
8. the method for sensing of capacitance touch control system according to claim 7, which is characterized in that this driving signal direct ratio
In this sensing signal.
9. the method for sensing of capacitance touch control system according to claim 7, which is characterized in that during this period according to the panel
The driving frequency of driving signal adjusts.
10. the method for sensing of capacitance touch control system according to claim 7, which is characterized in that the pen presses signal transmission
To the control unit, which simulates this pressure signal to number and converts, big further according to the numerical value after conversion
Small output voltage signal.
11. the method for sensing of capacitance touch control system according to claim 7, which is characterized in that control unit output
The time span of the voltage signal is proportional to the size that this presses signal.
12. the method for sensing of capacitance touch control system according to claim 7, which is characterized in that the frequency of the voltage signal
Rate is identical as the driving frequency of the panel driving signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710580107.1A CN109271051B (en) | 2017-07-17 | 2017-07-17 | Capacitive touch system and sensing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710580107.1A CN109271051B (en) | 2017-07-17 | 2017-07-17 | Capacitive touch system and sensing method thereof |
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| Publication Number | Publication Date |
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| CN109271051A true CN109271051A (en) | 2019-01-25 |
| CN109271051B CN109271051B (en) | 2021-09-28 |
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| CN102622104A (en) * | 2011-01-26 | 2012-08-01 | 汉王科技股份有限公司 | Capacitance stylus capable of sensing pressure |
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| US20160139730A1 (en) * | 2014-11-19 | 2016-05-19 | Japan Display Inc. | Display apparatus, method for driving display apparatus, and pointing device |
| US20160378208A1 (en) * | 2015-06-25 | 2016-12-29 | Apple Inc. | Method for stylus touch-down and lift-off noise mitigation |
| US20170031465A1 (en) * | 2015-07-31 | 2017-02-02 | Lg Display Co., Ltd. | Stylus pen and touch sensing system and driving method of the same |
| 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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2017
- 2017-07-17 CN CN201710580107.1A patent/CN109271051B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102109916A (en) * | 2009-12-29 | 2011-06-29 | 万达光电科技股份有限公司 | Touch system, double-input touch system and touch sensing method |
| CN102622104A (en) * | 2011-01-26 | 2012-08-01 | 汉王科技股份有限公司 | Capacitance stylus capable of sensing pressure |
| CN103777786A (en) * | 2012-10-25 | 2014-05-07 | 三星电子株式会社 | Electronic pen using delay device and touch input system and method thereof |
| US20160139730A1 (en) * | 2014-11-19 | 2016-05-19 | Japan Display Inc. | Display apparatus, method for driving display apparatus, and pointing device |
| US20160378208A1 (en) * | 2015-06-25 | 2016-12-29 | Apple Inc. | Method for stylus touch-down and lift-off noise mitigation |
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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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| CN109271051B (en) | 2021-09-28 |
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