CN103455188A - Touch signal generating method and touch display - Google Patents
Touch signal generating method and touch display Download PDFInfo
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- CN103455188A CN103455188A CN2012101779057A CN201210177905A CN103455188A CN 103455188 A CN103455188 A CN 103455188A CN 2012101779057 A CN2012101779057 A CN 2012101779057A CN 201210177905 A CN201210177905 A CN 201210177905A CN 103455188 A CN103455188 A CN 103455188A
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Abstract
The invention discloses a touch signal generating method and a touch display. The touch display comprises a touch signal generating circuit, and the touch signal generating circuit comprises an integrator, a sensing control circuit and a sample holding circuit. The sensing control circuit receives transfer pulse, generates on-off control signals and controls the integrator to perform sensing and generate integrated signals when the transfer pulse is triggered in a non-edge manner. The sample holding circuit outputs touch signals according to the integrated signals.
Description
Technical field
This exposure relates to a kind of signal generating method and display, and particularly relevant for a kind of touching signals production method and touch control display.
Background technology
Referring to Fig. 1 and Fig. 2, it is to produce the oscillogram of the touching signals that circuit produced during by touch-control in contact panel for traditional touching signals that Fig. 1 illustrates, and Fig. 2 illustrates the oscillogram that produces the touching signals that circuit produced during not by touch-control in contact panel for traditional touching signals.When contact panel, during by user's touch-control, touching signals TS1 can be suddenly big or suddenly small, and considerably unstable.When contact panel, during not by user institute touch-control, touching signals TS1 also can be suddenly big or suddenly small, and considerably unstable.
One of unsettled reason of touching signals TS1, while being that pixel is discharged and recharged, can produce to traditional touching signals the integrator formation noise of circuit.Noise can cause that integrated curve up or down beats, and causes waving of touching signals TS1.
Summary of the invention
This exposure relates to a kind of touching signals production method and touch control display.
According to this exposure, a kind of touching signals production method is proposed.The touching signals production method comprises; Receive transfer pulse (Transfer Pulse, TP); Control according to switch controlling signal the period that integrator is non-edge-triggered in the transfer pulse and carry out sensing to produce integrated signal; And according to integrated signal output touching signals.
According to this exposure, a kind of touch control display is proposed.Touch control display comprises that touching signals produces circuit, and touching signals generation circuit comprises integrator, sensing control circuit and sample-and-hold circuit.Sensing control circuit receives the transfer pulse and produces switch controlling signal.Sensing control circuit is controlled according to switch controlling signal the period that integrator is non-edge-triggered in the transfer pulse and is carried out sensing to produce integrated signal.Sample-and-hold circuit is exported touching signals according to integrated signal.
Touching signals of the present invention produces circuit can carry out sensing by the triggering edge of avoiding transferring pulse TP and disturb to reduce noise, and sensing control circuit can be controlled integrator and carry out sensing in the suitable sensing time and disturb to avoid being subject to noise NS.
For there is better understanding the above-mentioned and other aspect to this exposure, special embodiment below, and coordinate appended graphicly, be described in detail below:
The accompanying drawing explanation
Fig. 1 illustrates the oscillogram that produces the touching signals that circuit produced during by touch-control in contact panel for traditional touching signals.
Fig. 2 illustrates the oscillogram that produces the touching signals that circuit produced during not by touch-control in contact panel for traditional touching signals.
Fig. 3 illustrates the schematic diagram into the signal generating circuit according to the first embodiment.
Fig. 4 illustrates the process flow diagram into a kind of touching signals production method according to the first embodiment.
Fig. 5 illustrates as a kind of signal waveforms according to the first embodiment.
Fig. 6 illustrates the schematic diagram into a kind of sensing control circuit according to the second embodiment.
Fig. 7 illustrates the schematic diagram into a kind of signal generating circuit according to the 3rd embodiment.
Fig. 8 illustrates the oscillogram into a kind of integrated signal according to the 3rd embodiment, polar signal, output enable (Output Enable, OE) signal and touching signals.
It is the schematic diagram for a kind of signal generating circuit according to the 4th embodiment that Fig. 9 illustrates.
Drawing reference numeral:
2: contact electrode
3,8,9: touching signals produces circuit
31: integrator
32,82: sensing control circuit
33: sample-and-hold circuit
41～43: step
94: the polarity holding circuit
311 operational amplifiers
321: counter
322: EV calculator
Cf: integrating capacitor
CPV: grid clock signal
Data: data-signal
GVON, GVOFF: grid voltage control signal
NS: noise
OE: output enable signal
POL: polar signal
TS1, TS2: touching signals
TP: transfer pulse
Td: time delay
Sync1, Sync2: synchronizing signal
SW: switch
Vref: switch controlling signal
Embodiment
The first embodiment
Referring to Fig. 3, Fig. 4 and Fig. 5, Fig. 3 illustrates the schematic diagram into the signal generating circuit according to the first embodiment, Fig. 4 illustrates the process flow diagram into a kind of touching signals production method according to the first embodiment, and Fig. 5 illustrates as a kind of signal waveforms according to the first embodiment.Touch control display comprises that touching signals produces circuit 3, and touching signals generation circuit 3 comprises integrator 31, sensing control circuit 32 and sample-and-hold circuit 33.Integrator 31 comprises operational amplifier 311, integrating capacitor Cf and switch SW.Operational amplifier 311 is electrically connected to contact electrode 2.When the user encounters touch-control electrode 2, integrator 31 can sense the variation of electric capacity, and exports corresponding integrated signal IS.Switch SW is controlled by switch controlling signal Vref and opens (turn on) or close (turn off).When switch SW is closed, operational amplifier 311 collocation integrating capacitor Cf produce integrated signal IS.On the contrary, when switch SW is opened, integrator 31 stops producing integrated signal IS.
The touching signals production method can be applied to above-mentioned touching signals and produce circuit 3, and comprises the steps: that at first, as shown in step 41, sensing control circuit 32 receives transfer pulse TP.Source electrode driver starts outputting data signals Data after the transfer pulse TP that receives time schedule controller output.When pixel is discharged and recharged according to data-signal Data, will produce accordingly noise NS.After output enable signal OE exports gate drivers to, gate drivers can start to export corresponding sweep signal Gate according to output enable signal OE.The grid clock signal CPV provide the clock signal to gate drivers.Gate drivers is according to the waveform of grid voltage control signal GVON and grid voltage control signal GVOFF gated sweep signal Gate.
Then, as shown in step 42, sensing control circuit 32 is controlled according to switch controlling signal Vref the period that integrator 31 is non-edge-triggered in transfer pulse TP and is carried out sensing to produce integrated signal IS.Then as shown in step 43, sample-and-hold circuit 33 is according to integrated signal IS output touching signals TS2.Because sensing control circuit 32 can suitably be controlled the sensing time of integrator 31, so can avoid the interference of noise to integrator 31, be allowed sample-and-hold circuit 33 that stable touching signals TS2 can be provided.
Furthermore, touching signals produces circuit 3 and receives a synchronous signal, and touching signals produces circuit 3 and produces switch controlling signal according to the triggering edge of synchronizing signal.The triggering edge of synchronizing signal is for example that the rising of output enable signal OE or grid voltage control signal GVON triggers edge.Perhaps, the triggering edge of synchronizing signal is for example the decline triggering edge of grid clock signal CPV or grid voltage control signal GVOFF.In other words, touching signals produces circuit 3 and can carry out sensing by the triggering edge of avoiding transferring pulse TP and disturb to reduce noise.
The second embodiment
Referring to Fig. 5 and Fig. 6, Fig. 6 illustrates the schematic diagram into a kind of sensing control circuit according to the second embodiment.In addition, aforementioned touching signals produces circuit 3 also can receive synchronizing signal, then counts a time delay to produce switch controlling signal after synchronizing signal produces.Synchronizing signal is for example output enable signal OE, grid voltage control signal GVON, grid voltage control signal GVOFF, transfer pulse TP or grid clock signal CPV.Touching signals produces circuit 3 and counts a time delay to avoid transferring the triggering edge of pulse TP after synchronizing signal produces.In other words, touching signals produces circuit 3 and can carry out sensing by the triggering edge of avoiding transferring pulse TP and disturb to reduce noise.
For instance, sensing control circuit 32 further comprises counter 321 and EV calculator 322.Counter 321 is counting Td one time delay after transfer pulse TP produces.EV calculator 322 produces switch controlling signal Vref time delay after the Td counting.
Source electrode driver starts outputting data signals Data after the transfer pulse TP that receives time schedule controller output.When pixel is discharged and recharged according to data-signal Data, will produce accordingly noise NS.For fear of noise, NS affects touching signals, and switch controlling signal Vref controls the period that aforementioned integrator is non-edge-triggered in transfer pulse TP and carries out sensing to produce integrated signal IS.In other words, sensing control circuit 32 can be controlled integrator and carries out sensing in the suitable sensing time and disturb to avoid being subject to noise NS.
The 3rd embodiment
Referring to Fig. 5 and Fig. 7, Fig. 7 illustrates the schematic diagram into a kind of signal generating circuit according to the 3rd embodiment.The 3rd embodiment and the first embodiment main difference part are that the sensing control circuit 32 of touching signals generation circuit 8 is to produce switch controlling signal Vref according to synchronizing signal Sync1 and synchronizing signal Sync2.Transfer pulse TP, output enable signal OE, grid clock signal CPV, grid voltage control signal GVON or grid voltage control signal GVOFF that synchronizing signal Sync1 for example exports for time schedule controller, and the polar signal POL that synchronizing signal Sync2 for example exports for time schedule controller.
Please refer to Fig. 8, Fig. 8 illustrates the oscillogram into a kind of integrated signal according to the 3rd embodiment, polar signal, output enable signal and touching signals.Touching signals TS2 may have because of the difference of polarity different bits of offset standards.In order further to avoid touching signals TS2 to be subject to the impact of polarity, aforementioned sensing control circuit can be controlled integrator and carry out sensing to avoid touching signals TS2 to be affected when identical polar.Furthermore, sensing control circuit 32 receiving polarity signal POL, and, according to polar signal POL, switch controlling signal Vref is enabled in same polarity chron.
The 4th embodiment
Referring to Fig. 8 and Fig. 9, Fig. 9 illustrates the schematic diagram into a kind of signal generating circuit according to the 4th embodiment.The 4th embodiment and the first embodiment main difference part are that touching signals produces circuit 9 and more comprises polarity holding circuit 94.Polarity holding circuit 94 receiving key control signal Vref, and produce the polarity control signal of same polarity according to switch controlling signal Vref.Time schedule controller, according to polarity control signal, when switch controlling signal Vref enables, is exported the polar signal POL of same polarity.
In sum, although this exposure discloses as above with embodiment, so it is not in order to limit this exposure.This exposure person of ordinary skill in the field, in the spirit and scope that do not break away from this exposure, when being used for a variety of modifications and variations.Therefore, the protection domain of this exposure when with claim the person of being defined be as the criterion.
Claims (14)
1. a touching signals production method, is characterized in that, described touching signals production method comprises;
Receive a transfer pulse;
Control according to a switch controlling signal period that an integrator is non-edge-triggered in described transfer pulse and carry out sensing to produce an integrated signal; And
Export a touching signals according to described integrated signal.
2. touching signals production method as claimed in claim 1, is characterized in that, described touching signals production method more comprises:
Receive a synchronous signal;
Wherein after producing, described synchronizing signal counts a time delay to produce described switch controlling signal.
3. touching signals production method as claimed in claim 2, is characterized in that, described synchronizing signal is output enable signal, grid voltage control signal, transfer pulse or grid clock signal.
4. touching signals production method as claimed in claim 1, is characterized in that, described touching signals production method more comprises:
Receive a synchronous signal;
Wherein said switch controlling signal is to produce according to the triggering edge of described synchronizing signal.
5. touching signals production method as claimed in claim 4, is characterized in that, described synchronizing signal is output enable signal or grid voltage control signal.
6. touching signals production method as claimed in claim 1, is characterized in that, described touching signals production method more comprises:
Receive a polar signal;
According to described polar signal, described switch controlling signal is enabled in same polarity chron.
7. touching signals production method as claimed in claim 1, is characterized in that, described touching signals production method more comprises:
Produce a polarity control signal according to described switch controlling signal;
According to described polarity control signal, when described switch controlling signal enables, export the polar signal of same polarity.
8. a touch control display, is characterized in that, described touch control display comprises:
One touching signals produces circuit, comprising:
One integrator;
One sensing control circuit, in order to accept a transfer pulse and to produce a switch controlling signal, described sensing control circuit is controlled according to described switch controlling signal the period that the described transfer pulse of described integrator is non-edge-triggered and is carried out sensing to produce an integrated signal; And
One sample-and-hold circuit, in order to export a touching signals according to described integrated signal.
9. touch control display as claimed in claim 8, is characterized in that, described touching signals produces circuit and receives a synchronous signal, and described touching signals generation circuit more comprises:
One counter, be used to after described synchronizing signal produces count a time delay; And
One EV calculator, produce described switch controlling signal described time delay after counting.
10. touch control display as claimed in claim 9, is characterized in that, described synchronizing signal is output enable signal, grid voltage control signal, transfer pulse or grid clock signal.
11. touch control display as claimed in claim 8, is characterized in that, described touching signals produces circuit and receives a synchronous signal, and described touching signals generation circuit produces a switch controlling signal according to the triggering edge of described synchronizing signal.
12. touch control display as claimed in claim 11, is characterized in that, the triggering edge that described synchronizing signal is the output enable signal or grid voltage control signal.
13. touch control display as claimed in claim 8, is characterized in that, described touching signals produces circuit and receives a polar signal, and described touching signals generation circuit enables described switch controlling signal according to described polar signal in same polarity chron.
14. touch control display as claimed in claim 8, is characterized in that, described touch control display more comprises:
One polarity holding circuit, in order to receive described switch controlling signal, produce the polarity control signal of a same polarity according to described switch controlling signal.
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| CN2012101779057A CN103455188A (en) | 2012-06-01 | 2012-06-01 | Touch signal generating method and touch display |
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| CN2012101779057A CN103455188A (en) | 2012-06-01 | 2012-06-01 | Touch signal generating method and touch display |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109324717A (en) * | 2018-11-14 | 2019-02-12 | 友达光电股份有限公司 | Touch display device and touch driving method |
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| US20070247172A1 (en) * | 2006-04-19 | 2007-10-25 | Zhiqian Li | Charge transfer device and method, touch sensing device and method |
| CN101681223A (en) * | 2007-05-07 | 2010-03-24 | 爱特梅尔公司 | Two-dimensional position sensor |
| CN102135828A (en) * | 2010-01-26 | 2011-07-27 | 禾瑞亚科技股份有限公司 | Method and device for signal detection |
| CN102224485A (en) * | 2008-10-22 | 2011-10-19 | 爱特梅尔公司 | Noise handling in capacitive touch sensors |
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2012
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070247172A1 (en) * | 2006-04-19 | 2007-10-25 | Zhiqian Li | Charge transfer device and method, touch sensing device and method |
| CN101681223A (en) * | 2007-05-07 | 2010-03-24 | 爱特梅尔公司 | Two-dimensional position sensor |
| CN102224485A (en) * | 2008-10-22 | 2011-10-19 | 爱特梅尔公司 | Noise handling in capacitive touch sensors |
| CN102135828A (en) * | 2010-01-26 | 2011-07-27 | 禾瑞亚科技股份有限公司 | Method and device for signal detection |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109324717A (en) * | 2018-11-14 | 2019-02-12 | 友达光电股份有限公司 | Touch display device and touch driving method |
| CN109324717B (en) * | 2018-11-14 | 2022-03-29 | 友达光电股份有限公司 | Touch display device and touch driving method |
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Application publication date: 20131218 |