CN104461093B - Control system and its contactor control device - Google Patents
Control system and its contactor control device Download PDFInfo
- Publication number
- CN104461093B CN104461093B CN201310423457.9A CN201310423457A CN104461093B CN 104461093 B CN104461093 B CN 104461093B CN 201310423457 A CN201310423457 A CN 201310423457A CN 104461093 B CN104461093 B CN 104461093B
- Authority
- CN
- China
- Prior art keywords
- signal
- touch signal
- control system
- impedance network
- matching impedance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
Abstract
The invention discloses a kind of control system for contact panel, the wherein contact panel has plural sensing unit.This control system includes compensation circuit, charge amplifier, and signal processing circuit.Compensation circuit includes plural matching impedance network.Compensation circuit receives the touch signal of a specific sensing unit in multiple sensing units, and selects one as the drive access of touch signal to produce compensation touch signal in multiple matching impedance networks.Charge amplifier receives the compensation touch signal from signal path to produce amplification touch signal.Signal processing circuit receives amplification touch signal, and detects whether specific sensing unit is touched according to amplification touch signal.The present invention separately provides a kind of contactor control device with the control system.The waveform because caused by impedance mismatch can thereby be avoided so that the signal processing circuit of rear end can more accurately judge whether touch event occurs in corresponding sensing unit.
Description
Technical field
Present invention is directed to a kind of touch technology, in particular to a kind of control system and its contactor control device.
Background technology
In general, contact panel can be divided into electric resistance touch-control panel, capacitance type touch-control panel and piezoelectric type touch surface
The types such as plate.In these types, piezoelectric type contact panel has higher signal noise ratio（Signal-noise ratio,
SNR）, the sensing signal of better quality can be obtained.When a sensing unit of piezoelectric type contact panel is touched one time, come since then
The touch signal of sensing unit has a signal wave crest.Detection circuit thereby can detect the generation of touch event by signal wave crest.
Because this touch signal has the presence of imaginary part, therefore, when touch signal and the impedance mismatch of detection circuit front-end, it will
Produce and be maintained for more than the waveform of 1 second, and touch signal can with waveform superposition together with.When the sensing in this 1 second
When sensing unit arround unit is touched that either the sensing unit is touched again, due to touch signal and waveform
Superposition so that the detection circuit follow-up signal wave crest that can not correctly judge belongs to touch signal or waveform.Cause
This, detection circuit can not correctly detect the generation of touch event.
The content of the invention
Thus, it is desirable to present a kind of control system for contact panel, it is avoided that the generation of waveform, with correct
Detect the generation of touch event in ground.
The present invention provides a kind of control system, for the contact panel with multiple sensing units.This control system includes
Compensation circuit, charge amplifier, and signal processing circuit.Compensation circuit includes plural matching impedance network.Compensation circuit connects
The touch signal of a specific sensing unit in multiple sensing units is received, and selects one to make in multiple matching impedance networks
It is the drive access of touch signal to produce compensation touch signal.Charge amplifier receives the compensation from signal path and touches letter
Number with produce amplify touch signal.Signal processing circuit receives amplification touch signal, and detects spy according to amplification touch signal
Determine whether sensing unit is touched.
The present invention provides a kind of contactor control device.This contactor control device includes contact panel and control system.Contact panel has
There are multiple sensing units.Control system receives the touch signal of a specific sensing unit in multiple sensing units, and has
Multiple matching impedance networks.Control system selects drive access of the one as touch signal in multiple matching impedance networks,
And detect whether touch event occurs in specific sensing unit according to the touch signal by drive access.
The waveform because caused by impedance mismatch can thereby be avoided so that the signal processing circuit of rear end can be more accurate
Whether touch event occurs in sensing unit corresponding to really judging.
Brief description of the drawings
Fig. 1 represents contactor control device according to an embodiment of the invention；
Fig. 2 represents the equivalent circuit of sensing unit；
Fig. 3 represents the equivalent modules of the signal source of a corresponding sensing unit；
Fig. 4 represents control system according to an embodiment of the invention；
Fig. 5 represents the signal processing circuit according to one embodiment of the invention, in Fig. 4 control system；
Fig. 6 represents the circuit framework according to one embodiment of the invention, in Fig. 4 matching impedance network；
Fig. 7 A and 7B figures represent the circuit framework according to other embodiments of the invention, in Fig. 4 matching impedance network；
Fig. 8 A represent in Fig. 4, the caused benefit when touch signal is by the less matching impedance network of equiva lent impedance
Repay touch signal；
Fig. 8 B represent in Fig. 4, the caused benefit when touch signal is by the larger matching impedance network of equiva lent impedance
Repay touch signal；
Fig. 9 A are represented in Figure 5, not yet by the compensation touch signal of high-pass filter；
Fig. 9 B represent in Figure 5, the compensation touch signal after the filtering operation of high-pass filter；And
Figure 10 represents contactor control device according to another embodiment of the present invention.
Embodiment
To enable the above-mentioned objects, features and advantages of the present invention to become apparent, a preferred embodiment cited below particularly, and match somebody with somebody
Institute's accompanying drawings are closed, are described in detail below.
Fig. 1 systems represent contactor control device according to embodiments of the present invention.Refering to Fig. 1, contactor control device 1 include contact panel 10 with
And control system 11.In embodiments of the present invention, the system of touch surface 10 is by taking piezoelectric type as an example.Contact panel 10 includes being configured to array
A plurality of sensing units 100.In the embodiment in figure 1, it is exemplified by being configured to the 20 of 4X5 arrays sensing units.Control
System 11 receives the touch signal from these sensing units to detect whether contactor control device occurs touch event respectively.
Fig. 2 represents the equivalent circuit of sensing unit, and it includes capacitor C0With C1, resistor R1, and inductor L1.Electricity
Container C1, resistor R1, and inductor L1It is series between node N20 and N21.Capacitor C0It is coupled to node N20 and N21
Between.According to the equivalent circuit of each sensing unit in Fig. 2, equiva lent impedance Z can be obtained0For：
--- --- --- --- -- formula（1）
Now, the equivalent modules of the signal source of corresponding each sensing unit are as shown in Figure 3.Wherein, S is to represent touch signal
Caused source.
According to above-mentioned（1）It can learn, the equiva lent impedance Z of each sensing unit0Imaginary part be present, be, equiva lent impedance Z0In the presence of
Reactive component.When touch signal and the impedance mismatch of back-end circuit, the generation of waveform can be caused, and then influence to touch
The correctness of detection.Matching impedance network may be selected to offset equiva lent impedance Z in the control system 11 of the embodiment of the present invention0Void
Portion so that the touch detection operation of control system 11 is not influenceed by waveform.
Fig. 4 systems represent control system 11 according to embodiments of the present invention.Refering to Fig. 4, control system 11 includes compensation circuit
40, charge amplifier 41, and signal processing circuit 41.Compensation circuit 40 includes the first multiplexer 400 and plural number matching
Impedance network.In the fig. 4 embodiment, it is to illustrate by taking 4 matching impedance networks 401~404 as an example, but not limited to this.
There is different equiva lent impedances each other with impedance network 401~404, wherein, the equiva lent impedance of matching impedance network 401~404
Sequentially to increase.First multiplexer 400 couples contact panel 10 to receive a touch signal, and optionally believes the touch
Number it is sent to one of matching impedance network 401~404.Charge amplifier 41 couples matching impedance network 401~404 in defeated
Ingress N40.Charge amplifier 41 includes operational amplifier 410, input capacitor 411, feedback condenser 412, and resistance
Device 413.The positive input terminal of operational amplifier（+）Coupling ground connection GND, and the output node of its output end coupling charge amplifier 41
N41.The input node N40 of the first end coupling charge amplifier 41 of input capacitor 411, and its second end coupling operation amplifier
The negative input end of device（-）.Feedback condenser 412 is coupled between input node N40 and output node N41.Resistor 413 couples
In the negative input end of operational amplifier 410（1）Between output end N41.The circuit framework of above-mentioned charge amplifier 41 is only
One demonstration example.In other embodiments, charge amplifier 41 can be realized with other circuit frameworks.First multiplexer 400 by
One of matching impedance network 401~404 is selected to the control of signal processing circuit 42, the touch signal that will be received
It is sent to selected matching impedance network.
In one embodiment of this invention, as shown in figure 5, Fig. 5 illustrates the signal processing circuit of control system in Fig. 4.
Wherein signal processing circuit 42 includes wave filter 420, sample-and-hold circuit 421, analog-digital converter 422, and processor
423.Illustrate the operation of the control system 11 of the present invention below in conjunction with Fig. 4~Fig. 5.Assuming that the system's coupling at present of control system 11
Sensing unit 100 with detect whether occur touch event.Now, the first multiplexer 400, which receives, comes from sensing unit in Fig. 1
100 touch signal S100.For example, the first multiplexer 400 selects initial matching impedance network 401 to believe as touch
Number S100 transmission channel.Matching impedance network 401 is only a demonstration example as initial matching impedance network.In other embodiment
In, initial matching impedance network determines according to system requirements.Then, the first multiplexer 400 transmits touch signal S100
To matching impedance network 401 so that in the output node of compensation circuit 40（That is the input node N40 of charge amplifier 41）Upper production
Raw compensation touch signal S40.Charge amplifier 41 receives compensation touch signal S40, and compensation touch signal S40 is amplified
Operation amplifies touch signal S41 to be produced in output end N41.The wave filter 420 of process circuit 42 couples signal charge amplifier
41 output end N41 amplifies touch signal S41 to receive.Wave filter 420 performs filtering to the amplification touch signal S41 received
Operation.In this embodiment, wave filter 420 is a high-pass filter, for amplification touch signal S41 perform high-pass filtering with
Filter out low frequency signal.Sample-and-hold circuit 421 couples wave filter 410, and receives amplification touch signal S41 after filtering.Take
Sample holding circuit 421 is sampled maintenance operation to the amplification touch signal received, thereby produces sampled signal S421.Simulation
Digital quantizer 422 couples sample-and-hold circuit 421.Analog-digital converter 422 receives sampled signal S421, and sampling is believed
Number S421 carries out Analog-digital Converter operation, and sampled signal S421 thereby is converted into data signal S422.
Refering to Fig. 5, processor 423 couples wave filter 420 to receive amplification touch signal S41 after filtering.Processor
423 calculate the amplification touch signal S41 received signal noise ratio, and whether the signal noise ratio that judgement calculates is pre- less than one
If critical value, thereby control whether the first multiplexer 400 switches another matching impedance network of selection as transmission channel.Work as place
The signal noise ratio that reason device 423 judges to calculate is less than default threshold value, then controls more than first through control signal S423
Business device 400 selects another matching impedance network（Such as matching impedance network 401）It is used as transmission channel, that is, transmits channel by first
Beginning matching impedance network 401 is changed into initial matching impedance network 402.When signal noise ratio that the judgement of processor 423 calculates etc.
In or more than preset critical, then the first multiplexer 400 is controlled to maintain to select current matching through control signal S423
Impedance network is used as transmission channel, i.e., is transmission channel still by initial matching impedance network 401.When the first multiplexer 400
When switching selection matching impedance network 402 is as transmission channel, processor 423 continues executing with the judgement behaviour of above-mentioned signal noise ratio
Make to control whether the first multiplexer 400 switches another matching impedance network of selection, until signal noise ratio is equal to or more than
Untill preset critical.As shown in figure 5, processor 423 is also coupled to analog-digital converter 422, and receive data signal S422.
Processor 423 detects whether sensing unit 100 is touched according to data signal S422.
In embodiments of the present invention, each system of matching impedance network 401~404 is by capacitor CX, resistor RX, Yi Ji electricity
Sensor LX, as shown in Figure 6.In figure 6, capacitor CX, resistor RX, and inductor LXIt is one another in series.For each matching resistance
Anti- network, because circuit forms so that its equiva lent impedance has imaginary part, is, and reactive component be present.By the first multiplexer
400 selection for matching impedance network, the imaginary part of the matching impedance network of final choice and sensing unit detected at present
The imaginary part of equiva lent impedance repeal by implication.Therefore, it can avoid producing waveform, and improve the accuracy that detection touches.In Fig. 6
The circuit connection framework of each matching impedance network is a demonstration example.In other embodiments, capacitor LXWith resistor RXString
Connection, and the container L to connectXWith resistor RXAgain with inductor CXParallel connection, as shown in Figure 7 A.In yet other embodiment, electricity
Container CXWith inductor RXSeries connection, and the container C to connectXWith inductor RXAgain with resistor LXParallel connection, as shown in Fig. 7 B figures.
According to above-mentioned, all equiva lent impedances of matching impedance network 401~404 are different from each other and sequentially increase.Therefore, letter is touched
Caused compensation touch signal S40 will also different waveform after Different matching impedance network by number S100.
Fig. 8 A systems are represented when touch signal S100 matching impedance networks less by equiva lent impedance（Such as matching impedance
Network 401 or 402）Caused compensation touch signal S40.Because above-mentioned imaginary part is offseted, waveform is for touch signal
S100 influence reduces, and therefore, compensation touch signal S40 has obvious crest P80.Through follow-up charge amplifier 41 with
Signal processing circuit 42 can be detected in sensing unit 100 according to this crest P80（Detected sensing unit at present）Occur
Touch event.Shown in Fig. 8 B systems when touch signal S100 is by the larger matching impedance network of equiva lent impedance（Such as matching resistance
Anti- network 403 or 404）Caused compensation touch signal S40.Because above-mentioned imaginary part is offseted, relative to waveform, compensation
Touch signal S40 has more prominent crest P81.Can basis through follow-up charge amplifier 41 and signal processing circuit 42
This crest P81 more accurately detects that touch event occurs in sensing unit 100.
According to above-mentioned, signal processing circuit 42 has high-pass filter 420, and it filters out compensation touch signal S40 low frequency
Composition is available for the radio-frequency component of touch detection to obtain.Fig. 9 A systems represent not yet to touch letter by the compensation of high-pass filter 420
Number S40.Fig. 9 B systems represent the compensation touch signal S40 after the filtering operation of high-pass filter 420.In figure 9 a, crest
P90 is indicated in sensing unit 100（Detected sensing unit at present）Generation touch event.When compensation touch signal S40 warps
After crossing high-pass filter 420, indicate that the crest P91 that touch event occurs in sensing unit 100 significantly has large magnitude,
As shown in Figure 9 B.In 9B figures, crest P92 is additionally present of.The crest P92 occurred first is that sampled data is grown in filtering operation
Garbage signal caused by zero padding is carried out when degree mismatches with filter length.Therefore, in signal processing circuit 42, letter can be used
Single signal processing method ignores first crest P92, thereby can judge that touch event is sent out according to crest P91 exactly
It is raw.
In another embodiment of the invention, control system 11 further includes the second multiplexer 101, as shown in Figure 10.The
Two multiplexers 101 are coupled between all sensing units and compensation circuit 40 of contact panel 10.Second multiplexer 101 selects
Couple to selecting property a sensing unit and compensation circuit 40, thereby by corresponding touch signal be sent to compensation circuit 40 to carry out on
The detection that the matching impedance network selection stated and touch event occur.Second multiplexer 101 can determine according to default
The order of its fixed selection sensing unit.
According to the various embodiments of the invention described above, present invention system provides more matching impedance networks, and for from each
The touch signal of sensing unit simultaneously selects appropriate matching impedance network as transmission channel.Consequently, it is possible to it can avoid because resistance
Waveform caused by anti-mismatch so that the signal processing circuit 11 of rear end can more accurately judge corresponding sensing unit
On whether touch event occurs.
Though the present invention is disclosed above with preferred embodiment, so it is not limited to the scope of the present invention, any affiliated skill
Have usually intellectual in art field, without departing from the spirit and scope of the invention, when a little change and retouching can be done, because
The protection domain of this present invention when depending on after attached claim institute defender be defined.
Claims (17)
1. a kind of control system, for contact panel, the wherein contact panel has plural sensing unit, the control system bag
Include：
One compensation circuit, including plural matching impedance network, wherein, the compensation circuit, which receives, comes from a spy in such sensing unit
Determine a touch signal of sensing unit, and select one logical as a transmission of the touch signal in plural matching impedance network
To produce a compensation touch signal, the compensation circuit further includes one first multiplexer on road, couples such matching impedance network, and
The touch signal is received, wherein, the touch signal is optionally coupled to such matching impedance network by first multiplexer
One, to produce the compensation touch signal；
One charge amplifier, the compensation touch signal from the signal path is received to produce an amplification touch signal；And
One signal processing circuit, the amplification touch signal is received, and the specific sensing list is detected according to the amplification touch signal
Whether member is touched.
2. control system according to claim 1, it is characterised in that the signal processing circuit calculates the amplification touch signal
A signal noise ratio, when the value for judging the signal noise ratio is less than a critical value, the signal processing circuit controls the compensation
Circuit selects the other of such matching impedance network to be used as the drive access.
3. control system according to claim 1, it is characterised in that such matching impedance network has different equivalent resistances
It is anti-.
4. control system according to claim 1, it is characterised in that each matching impedance network includes a capacitor,
One inductor, and a resistor.
5. control system according to claim 1, it is characterised in that the signal processing circuit includes：
One wave filter, the amplification touch signal is received, and a filtering operation is performed to the amplification touch signal；And
One processor, the amplification touch signal from the wave filter is received, calculate a signal noise of the amplification touch signal
Than, and judge whether the value of the signal noise ratio is less than a critical value；
Wherein, when the processor judges that the value of the signal noise ratio is less than the critical value, the processor controls the compensation circuit
The other of such matching impedance network is selected to be used as the drive access.
6. control system according to claim 5, it is characterised in that when the processor judges value of the signal noise ratio etc.
When the critical value, the processor controls the matching impedance network that the compensation circuit maintains to select at present as the biography
Send path.
7. control system according to claim 5, it is characterised in that the processor further includes：
One sample-and-hold circuit, the amplification touch signal from the wave filter is received, and one is carried out to the amplification touch signal
Sampling maintains operation to produce a sampled signal；And
One analog-digital converter, the sampled signal is received, and an Analog-digital Converter operation is carried out to the sampled signal to produce
A raw data signal；
Wherein, the processor receives the data signal, and detects whether the specific sensing unit is touched according to the data signal
Touch.
8. control system according to claim 5, it is characterised in that the wave filter is a high-pass filter.
9. control system according to claim 1, it is characterised in that the charge amplifier includes：
One operational amplifier, have and couple a positive input terminal, a negative input end, an output end, wherein, the operational amplifier is somebody's turn to do
Positive input terminal and the output end are respectively coupled to a ground connection and an output node；
One input capacitor, there is a first end and one second end, wherein, the first end of the input capacitor and this
Two ends are respectively coupled to an input node and the negative input end of the operational amplifier；
One feedback condenser, it is coupled between the input node and the output node；And
One resistor, it is coupled between the negative input end of the operational amplifier and the output node；
Wherein, the input node receives the compensation touch signal, and the amplification touch signal results from the output node.
10. control system according to claim 1, it is characterised in that further include：
One second multiplexer, is coupled between the contact panel and the compensation circuit；
Wherein, second multiplexer selects one of such sensing unit to be coupled to the compensation circuit so that selected
The sensing unit is as the specific sensing unit.
11. a kind of contactor control device, including：
One contact panel, there is plural sensing unit；And
One control system, a touch signal of a specific sensing unit in such sensing unit is received, and with plural number
With impedance network, the control system includes a compensation circuit, including such matching impedance network, and in such matching impedance network
As a drive access of the touch signal to produce a compensation touch signal, the compensation circuit further includes middle selection one：
One first multiplexer, such matching impedance network is coupled, and receive the touch signal；
Wherein, the touch signal is optionally sent to the one of such matching impedance network by first multiplexer, with production
The raw compensation touch signal；
Wherein, the control system selects a drive access of the one as the touch signal in such matching impedance network, and
Whether touch event occurs in the specific sensing unit according to by the touch signal of the drive access to detect.
12. contactor control device according to claim 11, it is characterised in that the control system includes：
One charge amplifier, the compensation touch signal from the drive access is received to produce an amplification touch signal；And
One signal processing circuit, the amplification touch signal is received, and the specific sensing list is detected according to the amplification touch signal
Whether touch event occurs in member.
13. contactor control device according to claim 12, it is characterised in that the signal processing circuit includes：
One wave filter, the amplification touch signal is received, and a filtering operation is performed to the amplification touch signal；And
One processor, the amplification touch signal from the wave filter is received, calculate a signal noise of the amplification touch signal
Than, and judge whether the value of the signal noise ratio is less than a critical value；
Wherein, when the processor judges that the value of the signal noise ratio is less than the critical value, the processor controls the compensation circuit
The other of such matching impedance network is selected to be used as the drive access.
14. contactor control device according to claim 13, it is characterised in that when the processor judges the value of the signal noise ratio
During equal to or more than the critical value, the matching impedance network conduct that the processor controls the compensation circuit to maintain to select at present should
Drive access.
15. contactor control device according to claim 13, it is characterised in that the processor further includes：
One sample-and-hold circuit, the amplification touch signal from the wave filter is received, and one is carried out to the amplification touch signal
Sampling maintains operation to produce a sampled signal；And
One analog-digital converter, the sampled signal is received, and an Analog-digital Converter operation is carried out to the sampled signal to produce
A raw data signal；
Wherein, whether the processor receives the data signal, and sent out in the specific sensing unit according to the data signal to detect
Raw touch event.
16. contactor control device according to claim 13, it is characterised in that the wave filter is a high-pass filter.
17. contactor control device according to claim 11, it is characterised in that each matching impedance network includes an electric capacity
Device, an inductor, and a resistor.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310423457.9A CN104461093B (en) | 2013-09-17 | 2013-09-17 | Control system and its contactor control device |
| TW103118536A TWI550451B (en) | 2013-09-17 | 2014-05-28 | Control systems and touch devices |
| TW103209339U TWM490061U (en) | 2013-09-17 | 2014-05-28 | Control systems and touch devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310423457.9A CN104461093B (en) | 2013-09-17 | 2013-09-17 | Control system and its contactor control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104461093A CN104461093A (en) | 2015-03-25 |
| CN104461093B true CN104461093B (en) | 2018-01-16 |
Family
ID=52907277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310423457.9A Active CN104461093B (en) | 2013-09-17 | 2013-09-17 | Control system and its contactor control device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104461093B (en) |
| TW (2) | TWM490061U (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104461093B (en) * | 2013-09-17 | 2018-01-16 | 宸鸿科技(厦门)有限公司 | Control system and its contactor control device |
| TWI676123B (en) * | 2018-10-05 | 2019-11-01 | 李尚禮 | Method for processing touch signal and signal processing system using same |
| TWI676122B (en) * | 2018-10-05 | 2019-11-01 | 李尚禮 | Method for processing touch signal and signal processing system using same |
| CN114168055A (en) * | 2021-10-29 | 2022-03-11 | 深圳市联新移动医疗科技有限公司 | Sliding unlocking control method and system and medical cart |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147678A (en) * | 2010-02-05 | 2011-08-10 | 三星电子株式会社 | Method and apparatus compensating noise in touch panel |
| CN102693055A (en) * | 2012-05-02 | 2012-09-26 | 东莞市乐升电子有限公司 | Detection device and detection method of signal of projected capacitive touch screen |
| CN203502930U (en) * | 2013-09-17 | 2014-03-26 | 宸鸿科技(厦门)有限公司 | Control system and touch control apparatus thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9075483B2 (en) * | 2007-12-21 | 2015-07-07 | Apple Inc. | Negative pixel compensation |
| US8629852B2 (en) * | 2009-11-12 | 2014-01-14 | Electronics And Telecommunications Research Institute | Touch screen and method for compensating sensing capacitance variations and offset variations thereof |
| KR101697342B1 (en) * | 2010-05-04 | 2017-01-17 | 삼성전자 주식회사 | Method and apparatus for performing calibration in touch sensing system and touch sensing system applying the same |
| CN102955589A (en) * | 2011-08-18 | 2013-03-06 | 宸鸿光电科技股份有限公司 | Touch-control panel control system and touch-control panel control method |
| CN102968224B (en) * | 2011-08-31 | 2016-08-03 | 宸鸿光电科技股份有限公司 | The control circuit of contact panel and control method |
| CN104461093B (en) * | 2013-09-17 | 2018-01-16 | 宸鸿科技(厦门)有限公司 | Control system and its contactor control device |
-
2013
- 2013-09-17 CN CN201310423457.9A patent/CN104461093B/en active Active
-
2014
- 2014-05-28 TW TW103209339U patent/TWM490061U/en unknown
- 2014-05-28 TW TW103118536A patent/TWI550451B/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147678A (en) * | 2010-02-05 | 2011-08-10 | 三星电子株式会社 | Method and apparatus compensating noise in touch panel |
| CN102693055A (en) * | 2012-05-02 | 2012-09-26 | 东莞市乐升电子有限公司 | Detection device and detection method of signal of projected capacitive touch screen |
| CN203502930U (en) * | 2013-09-17 | 2014-03-26 | 宸鸿科技(厦门)有限公司 | Control system and touch control apparatus thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201512930A (en) | 2015-04-01 |
| TWM490061U (en) | 2014-11-11 |
| TWI550451B (en) | 2016-09-21 |
| CN104461093A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10627959B2 (en) | Differential circuit, capacitance detection circuit, touch detection device and terminal device | |
| CN104461093B (en) | Control system and its contactor control device | |
| CN102495701B (en) | Touch detection method and touch detection device for capacitive touch screen | |
| CN103262417B (en) | A kind of circuit for capacitance touch application | |
| US10831321B2 (en) | Parallel sensing touch control device and operating method thereof | |
| CN102915138B (en) | Sensor electrode array control circuit, control method and touch-control sensing system thereof | |
| CN108141212B (en) | Capacitance measuring device with reduced noise | |
| CN102622144B (en) | Demodulation method and system for low-power differential detection capacitive touch control | |
| US10642431B2 (en) | Capacitance detection circuit, capacitance detection method, touch detection apparatus, and terminal device | |
| CN103365505A (en) | Sensing method and device for improving noise interference of capacitive touch device | |
| KR101509857B1 (en) | Control circuit and control method for a sensing electrode array and touch control sensing system using the same | |
| CN103365506A (en) | Sensing method and device for improving noise interference of capacitive touch device | |
| CN104679366A (en) | Capacitive touch sensing system | |
| CN111600590B (en) | Capacitance detection circuit and touch chip | |
| CN111837044B (en) | Capacitance detection circuit, touch chip, touch detection device and electronic equipment | |
| CN102488509A (en) | Device and method for acquiring biological electric signals | |
| CN108139842A (en) | It is used to reduce the system and method for noise in sensor systems | |
| CN110286787A (en) | Control chip and its operation method for touch panel | |
| CN106201128A (en) | Capacitance touching control system and frequency-selecting method thereof | |
| CN102880327A (en) | Touch circuit of touch screen and contact point detecting method | |
| TWI393040B (en) | An capacitor sensing circuit architecture of touch panel | |
| CN202750222U (en) | Audio frequency input circuit and electronic equipment with audio frequency input | |
| CN211785744U (en) | High-side current detection device and system | |
| CN203502930U (en) | Control system and touch control apparatus thereof | |
| KR101209114B1 (en) | Apparatus for sensing charge of touch panel with removing low frequency noise |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |