CN105242804B - Touch-control compensation circuit, its compensation method, touch-screen and display device - Google Patents
Touch-control compensation circuit, its compensation method, touch-screen and display device Download PDFInfo
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- CN105242804B CN105242804B CN201510603759.3A CN201510603759A CN105242804B CN 105242804 B CN105242804 B CN 105242804B CN 201510603759 A CN201510603759 A CN 201510603759A CN 105242804 B CN105242804 B CN 105242804B
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Abstract
The invention discloses a kind of touch-control compensation circuit, its compensation method, touch-screen and display device, when electric jamming be present in external environment, the fixed power source signal of power supply signal end input passes through charging module, the storage of discharge module and comparison module, electric discharge, and the comparison between reference signal, comparative result between the fixed voltage signal and reference signal of final counting module record is not equal to benchmark result, it can determine that drift occurs in reference signal, such as due to the external world exist electric jamming cause reference signal occur drift become it is big when, now the comparative result of counting module record is less than benchmark result, reference signal can be now adjusted by compensating module, reference signal is turned down by feedback signal, it is returned to initial value, vice versa.So it can detect whether reference signal drifts about under various circumstances, and the reference signal to drifting about adjusts accordingly, and ensures that reference signal maintains reference level, improves touch-control sensitivity.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of touch-control compensation circuit, its compensation method, touch-screen and aobvious
Showing device.
Background technology
With the development of touch screen technology, touch technology is developed rapidly, and each company is by introducing different touches
Technology is to realize that touch-control is shown.It is different according to touch panel design principle, resistive touch screen and capacitance touch can be divided into
Screen.And capacitive touch screen refers in contact panel in X-direction input drive signal, induced signal is received in Y direction, is passed through
Capacitance induction principle realizes touch controllable function.Usual capacitive touch screen divides into self-tolerant touch-screen and mutual tolerance touch-screen again.When
There is a reference capacitance when finger does not have contact panel, between drive signal and induced signal, and when on finger touch to panel
When, because human body has an electric capacity over the ground, cause the electric capacity between drive signal and induced signal to change.When input
When reference voltage signal is constant, causes the change of the quantity of electric charge due to adding a body capacitance, will be that we judge whether
There is the determinating reference of finger touch.
In addition, with the change of external environment, such as when external environment has an electric field, the datum in touch-screen
Easily drift about, so the reference capacitance in touch panel can be caused to change, and then lead to not to detect less
Touching signals, reduce the touch-control sensitivity of touch-screen.
Therefore, the reference signal in touch-screen how is calibrated, reference signal is maintained at reference level, improves touch-screen
Sensitivity, it is those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
The embodiments of the invention provide a kind of touch-control compensation circuit, its compensation method, touch-screen and display device, to solve
The problem of touch-control sensitivity reduces caused by certainly touch-screen internal reference signals are drifted about present in prior art.
The embodiments of the invention provide a kind of touch-control compensation circuit, including：Charging module, discharge module, comparison module, benefit
Repay module and counting module；Wherein,
The control terminal of the charging module is connected with control signal end, and input is connected with power supply signal end, output end with
The input of the discharge module is connected；The charging module is used under the control of the control signal end, by the power supply
The signal of signal end input carries out charging storage；
The control terminal of the discharge module is connected with the control signal end, and the first of output end and the comparison module is defeated
Enter end to be connected；The discharge module is used under the control of the control signal end, the letter for storage that the charging module is charged
Number it is discharged to the first input end of the comparison module；
Second input of the comparison module is used for input reference signal, output end and the input of the counting module
It is connected；The comparison module is used to the discharge module discharging the signal exported compared with the reference signal, and
When the magnitude of voltage of the signal exported in the discharge module discharge process reaches the magnitude of voltage of the reference signal, output counts letter
Number arrive the counting module input；
The counting module is used to be counted according to the count signal that the comparison module exports；
The input of the compensating module is used to input the reference signal, and output end is used for output feedback signal；It is described
Compensating module is used to determine whether the reference signal drifts about according to the count results of the counting module, and in the ginseng
When examining signal and drifting about, the feedback signal exported according to output end compensates the magnitude of voltage of the reference signal；Wherein, the meter
When the count results of digital-to-analogue block are not equal to benchmark result, determine that the reference signal is drifted about.
In a kind of possible embodiment, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, the charging
Module, specifically include：First switch device, the first electric capacity and first resistor；Wherein,
One end of first electric capacity is connected with ground level signal end, and the other end is connected with one end of the first resistor；
The other end of the first resistor is defeated with the output end of the first switch device and the discharge module respectively
Enter end to be connected；
The control terminal of the first switch device is connected with the control signal end, input and power supply signal end phase
Even；The first switch device is used to open under the control of the control signal end, is inputted by the power supply signal end
Signal charges to first electric capacity.
In a kind of possible embodiment, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, described first
Switching device is first switch transistor；The grid of the first switch transistor is connected with the control signal end, source electrode with
The power supply signal end is connected, and drain electrode is connected with the input of the discharge module.
In a kind of possible embodiment, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, the charging
Module is additionally operable to sense extraneous touch-control situation, and when touch-control occurs, the charging module also includes：Inductance capacitance and induced electricity
Resistance；
One end of the inductance capacitance is connected with one end of the inductive reactance, the other end respectively with first electric capacity
One end is connected with one end of the first resistor；
The other end of the inductive reactance is connected with the other end of first electric capacity and the ground level signal end respectively.
In a kind of possible embodiment, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, the electric discharge
Module, specifically include：Second switch device；
The control terminal of the second switch device is connected with the control signal end, and input is defeated with the charging module
Go out end to be connected, output end is connected with the first input end of the comparison module；The second switch device is used in the control
Opened under the control of signal end, the signal stored that the charging module is charged is discharged to the first input of the comparison module
End.
In a kind of possible embodiment, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, described second
Switching device is second switch transistor；The grid of the second switch transistor is connected with the control signal end, source electrode with
The output end of the charging module is connected, and drain electrode is connected with the first input end of the comparison module.
In a kind of possible embodiment, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, the compensation
Module, specifically include：First comparator, the second electric capacity and feedback capacity；Wherein,
The positive input of the first comparator is connected with the ground level signal end, negative-phase input respectively with it is described
One end of second electric capacity is connected with one end of the feedback capacity, and negative input is used to input the reference signal, exports
Hold and be used for output feedback signal；
The other end of second electric capacity is connected with the ground level signal end；
The other end of the feedback capacity is connected with the output end of the first comparator.
In a kind of possible embodiment, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, the comparison
Module, specifically include：Second comparator；
The positive input of second comparator is used to input the reference signal, negative input and the electric discharge mould
The output end of block is connected, and output end is connected with the input of the counting module.
In a kind of possible embodiment, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, in addition to：It is aobvious
Show module；
The display module is used to be shown the count results of the counting module.
The embodiments of the invention provide a kind of compensation method of above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, bag
Include：
Charging storage is carried out to the signal of power supply signal end input；
The signal of charging storage is discharged；
By the signal for output of discharging compared with the reference signal, and the voltage of the signal exported in discharge process
When value reaches the magnitude of voltage of the reference signal, count signal is exported；
Counted according to the count signal；
When determining that the reference signal is drifted about according to count results, the reference signal is compensated according to feedback signal
Magnitude of voltage；Wherein, when the count results are not equal to benchmark result, determine that the reference signal is drifted about.
The embodiments of the invention provide a kind of touch-screen, including above-mentioned touch-control compensation circuit provided in an embodiment of the present invention.
The embodiments of the invention provide a kind of display device, including above-mentioned touch-screen provided in an embodiment of the present invention.
The beneficial effect of the embodiment of the present invention includes：
The embodiments of the invention provide a kind of touch-control compensation circuit, its compensation method, touch-screen and display device, the touch-control
Compensation circuit includes：Charging module, discharge module, comparison module, compensating module and counting module；Wherein, charging module is used for
The signal that power supply signal end is inputted carries out charging storage；Discharge module is used to the signal of charging module charging storage being discharged to
The first input end of comparison module；Comparison module is used to discharge module discharging the signal exported compared with reference signal,
And the magnitude of voltage of the signal exported in discharge module in discharge process exports count signal when reaching the magnitude of voltage of reference signal
To the input of counting module；Counting module is used to be counted according to the count signal that comparison module exports；Compensating module is used
In determining whether reference signal drifts about according to the count results of counting module, and when reference signal is drifted about, according to
The magnitude of voltage of the feedback signal compensated reference signal of output end output；Wherein, the count results of counting module are not equal to benchmark knot
During fruit, determine that reference signal is drifted about.
Specifically, the fixed power source signal of power supply signal end input is stored and put with discharge module by charging module
Electricity, so by comparison module to fixed power source signal compared with reference signal, by counting module record comparative result,
It is determined that it is no generation touch-control when fixed voltage value and reference signal between result of the comparison, i.e., when reference signal is not drifted about
Benchmark result；When electric jamming be present in external environment, power supply signal end input fixed power source signal by charging module,
Storage, the electric discharge of discharge module and comparison module, and the comparison between reference signal, final counting module record are now solid
Comparative result between determining voltage signal and reference signal is not equal to benchmark result, you can determine that drift occurs in reference signal,
Such as due to the external world exist electric jamming cause reference signal occur drift become it is big when, now counting module record comparative result
Less than benchmark result, reference signal can be now adjusted by compensating module, i.e., by feedback signal by reference signal
Turn (feedback signal is equal with reference signal, when being adjusted, can adjust reference signal according to feedback signal) down, make its time
To initial value, vice versa.So it can detect whether reference signal drifts about under various circumstances, and to drifting about
Reference signal adjusts accordingly, and ensures that reference signal maintains reference level, improves touch-control sensitivity.
Brief description of the drawings
Fig. 1 is the structural representation of touch-control compensation circuit provided in an embodiment of the present invention；
Fig. 2 is the concrete structure schematic diagram of touch-control compensation circuit provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of the control signal of control signal end provided in an embodiment of the present invention input；
Fig. 4 is the compensation method flow chart of touch-control compensation circuit provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, to touch-control compensation circuit provided in an embodiment of the present invention, its compensation method, touch-screen and display
The embodiment of device is described in detail.
The embodiments of the invention provide a kind of touch-control compensation circuit, as shown in figure 1, can include：Charging module 01, electric discharge
Module 02, comparison module 03, compensating module 04 and counting module 05；Wherein,
The control terminal of charging module 01 connects with control signal end S-phase, and input is connected with power supply signal end Vdd, output end
It is connected with the input of discharge module 02；Charging module 01 is used under control signal end S control, by power supply signal end Vdd
The signal of input carries out charging storage；
The control terminal of discharge module 02 connects with control signal end S-phase, output end and the first input end phase of comparison module 03
Even；Discharge module 02 is used under control signal end S control, is discharged to and compares mould the charge signal of storage of charging module 01
The first input end of block 03；
Second input of comparison module 03 is used for input reference signal Vref, output end and the input of counting module 05
It is connected；Comparison module 03 be used for by discharge module 01 discharge output signal compared with reference signal Vref, and discharging
When the magnitude of voltage for the signal that module 02 exports in discharge process reaches reference signal Vref magnitude of voltage, output count signal arrives
The input of counting module 05；
Counting module 05 is used to be counted according to the count signal that comparison module 03 exports；
The input of compensating module 04 is used for input reference signal Vref, and output end is used for output feedback signal；Compensate mould
Block 04 is used to determine whether reference signal Vref drifts about according to the count results of counting module 05, and in reference signal Vref
When drifting about, the feedback signal compensated reference signal Vref exported according to output end magnitude of voltage；Wherein, counting module 05
When count results are not equal to benchmark result, determine that reference signal Vref drifts about.
Above-mentioned touch-control compensation circuit provided in an embodiment of the present invention includes：Charging module, discharge module, comparison module, benefit
Repay module and counting module.Specifically, the fixed power source signal of power supply signal end input enters by charging module with discharge module
Row storage and electric discharge, and then by comparison module to fixed power source signal compared with reference signal, remembered by counting module
Record comparative result, it is determined that it is no generation touch-control when fixed voltage value and reference signal between result of the comparison, i.e. reference signal
Benchmark result when not drifting about；When electric jamming be present in external environment, the fixed power source signal of power supply signal end input
It is final to count by the storage of charging module, discharge module and comparison module, electric discharge, and the comparison between reference signal
Now the comparative result between fixed voltage signal and reference signal is not equal to benchmark result to module record, you can it is determined that with reference to letter
Number there is drift, such as due to when the external world has electric jamming and causes reference signal that drift occurs to become big, now counting module
The comparative result of record is less than benchmark result, reference signal can be now adjusted by compensating module, that is, passes through feedback
Signal turns reference signal down that (feedback signal is equal with reference signal, when being adjusted, can adjust and join according to feedback signal
Examine signal), initial value is returned to, vice versa.So it can detect whether reference signal drifts about under various circumstances,
And the reference signal to drifting about adjusts accordingly, ensure that reference signal maintains reference level, improve touch-control sensitivity.
In the specific implementation, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, as shown in Fig. 2 charging module
01 can specifically include：First switch device, the first electric capacity C1 and first resistor R1；Wherein, the first electric capacity C1 one end and ground
Level signal end GND is connected, and the other end is connected with first resistor R1 one end；The first resistor R1 other end is opened with first respectively
The output end for closing device is connected with the input of discharge module 02；The control terminal of first switch device connects with control signal end S-phase,
Input is connected with power supply signal end Vdd；First switch device is used to open under control signal end S control, passes through power supply
The signal of signal end Vdd inputs charges to the first electric capacity C1.
Specifically, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, first switch device is in control signal end
Control under open, and then cause power supply signal end input signal the first electric capacity is charged.So can be by power supply signal end
The fixed voltage signal of input is stored, and the fixed voltage signal of storage is discharged by discharge module, and by comparing mould
Block is compared with reference signal, counting module record comparative result, and then can determine whether reference signal drifts about.
In the specific implementation, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, as shown in Fig. 2 first switch
Device is first switch transistor T1；First switch transistor T1 grid connects with control signal end S-phase, source electrode and power supply signal
End Vdd is connected, and drain electrode is connected with the input of discharge module 02.Specifically, above-mentioned touch-control compensation provided in an embodiment of the present invention
In circuit, first switch transistor T1 is turned under control signal end S control, and then can make it that power supply signal end Vdd is defeated
What is entered the first electric capacity C1 is charged, and realizes the charging storage of fixed voltage signal.
In the specific implementation, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, as shown in Fig. 2 charging module
01 can be also used for sensing extraneous touch-control situation, and when touch-control occurs, charging module 01 can also include：Inductance capacitance C2 and
Inductive reactance R2；Inductance capacitance C2 one end is connected with inductive reactance R2 one end, the other end respectively with the first electric capacity C1 one
End is connected with first resistor R1 one end；The inductive reactance R2 other end is believed with the first electric capacity C1 other end and ground level respectively
Number end GND be connected.Specifically, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, charging module 01 can also sense
Extraneous touch-control situation, inductance capacitance C2 are electric capacity when simulating human hand touch-control, when human hand does not have touch-control inductance capacitance C2 with
Inductive reactance R2 is not present, now (signal such as Fig. 3 of control signal end input when control signal end S input high level signals
It is shown), first switch transistor T1 conductings, and then the signal of power supply signal end Vdd inputs can be charged to the first electric capacity C1；
When control signal end S input low level signals, first switch transistor T1 cut-offs, now the first electric capacity C1 passes through discharge module
Discharged, the count signal statistics that now counting module exports according to comparison module has more during the first electric capacity C1 discharges
Few electric discharge reaches reference signal Vref magnitude of voltage, and records statistical result；When human hand touch-control, inductance capacitance C2 and sensing
There will be now under control signal end S control, power supply is believed for resistance R2 and the first electric capacity C1 and this loop of first resistor R1
Number end Vdd input signal not only charged to the first electric capacity C1, also to be charged to inductance capacitance C2, passing through discharge
During module discharge, because the quantity of electric charge of storage increases, counting module counts the number for the magnitude of voltage for reaching reference signal Vref
It is more when being bound to than no hand touch-control.It can so realize that touch control detection determines the generation of touch-control.
In a kind of possible embodiment, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, such as Fig. 2 institutes
Show, discharge module 02 can specifically include：Second switch device；The control terminal of second switch device connects with control signal end S-phase,
Input is connected with the output end of charging module 01, and output end is connected with the first input end of comparison module 03；Second switch device
Part is used to open under control signal end S control, and the charge signal of storage of charging module 01 is discharged into comparison module 03
First input end.Specifically, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, second switch device is in control signal
Open, the electric charge that charging module stores is discharged, and be output to comparison module and compared with reference signal under the control at end
Compared with may finally determine whether reference signal drifts about, and determine whether touch-control.
In the specific implementation, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, as shown in Fig. 2 second switch
Device is second switch transistor T2；Second switch transistor T2 grid connects with control signal end S-phase, source electrode and charging module
01 output end is connected, and drain electrode is connected with the first input end of comparison module 03.Specifically, it is provided in an embodiment of the present invention above-mentioned
In touch-control compensation circuit, second switch transistor T2 is turned under control signal end S control, and then can be by charging module 01
The voltage signal of charging storage is discharged.
In the specific implementation, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, as shown in Fig. 2 compensating module
04 can specifically include：First comparator B1, the second electric capacity C3 and feedback capacity C4；Wherein, first comparator B1's is positive defeated
Enter end be connected with ground level signal end GND, negative-phase input respectively with the second electric capacity C3 one end and feedback capacity C4 one end
It is connected, and negative input is used for input reference signal Vref, output end is used for output feedback signal；Second electric capacity C3's is another
End is connected with ground level signal end GND；The feedback capacity C4 other end is connected with first comparator B1 output end.Specifically,
In above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, when reference signal is drifted about, it can be adjusted according to feedback signal
Feedback capacity is saved, and then reference signal is adjusted correspondingly.
In the specific implementation, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, as shown in Fig. 2 comparison module
03 can specifically include：Second comparator B2；Second comparator B2 positive input is used for input reference signal Vref, negative sense
Input is connected with the output end of discharge module 02, and output end is connected with the input of counting module 05.Specifically, the present invention is real
In the above-mentioned touch-control compensation circuit for applying example offer, comparison module 03 can be realized by the second comparator B2, and then the mould that will discharge
The electric charge that block 02 discharges often reaches reference signal Vref magnitude of voltage just compared with reference signal Vref in discharge process
Export count signal once, counted by counting module 05, it is final to determine whether reference signal drifts about, can also be true
It is fixed whether to have finger touch.
It should be noted that in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, counting module can use meter
Number devices realize, the function of the operation principle and realization of comparator and counter is and prior art used by the embodiment of the present invention
In comparator it is identical with counter, be not described in detail here.
In the specific implementation, in above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, can also include：Show mould
Block；Display module is used to be shown the count results of counting module.Specifically above-mentioned touch-control provided in an embodiment of the present invention
In compensation circuit, the result of counting module record can be shown by display module, convenient to determine whether reference signal is sent out
It is raw to drift about and whether there is touch-control to free, when it is determined that reference signal is drifted about, realized by compensating module to reference signal
Adjustment.
Based on same inventive concept, the embodiments of the invention provide a kind of above-mentioned touch-control compensation provided in an embodiment of the present invention
The compensation method of circuit, as shown in figure 4, following steps can be specifically included：
S101, the signal to the input of power supply signal end carry out charging storage；
S102, the signal to charging storage discharge；
S103, the signal exported will be discharged compared with reference signal, and the electricity of the signal exported in discharge process
When pressure value reaches the magnitude of voltage of reference signal, count signal is exported；
S104, counted according to count signal；
S105, when determining that reference signal is drifted about according to count results, according to the electricity of feedback signal compensated reference signal
Pressure value；Wherein, when count results are not equal to benchmark result, determine that reference signal is drifted about.
Specifically, in the compensation method of above-mentioned touch-control compensation circuit provided in an embodiment of the present invention, the input of power supply signal end
Fixed power source signal by charge storage and electric discharge, and then compared with reference signal, by the comparative result of record, really
Be scheduled on when touch-control does not occur result of the comparison between fixed voltage value and reference signal, i.e., when reference signal is not drifted about
Benchmark result；When external environment has electric jamming, the fixed power source signal of power supply signal end input passes through charge storage, put
Electricity, and the comparison between reference signal, the comparative result between the fixed voltage signal and reference signal that most record
In benchmark result, you can determine that drift occurs in reference signal, such as cause reference signal to be sent out because the external world has electric jamming
When raw drift becomes big, the comparative result now recorded is less than benchmark result, it is therefore desirable to reference signal is adjusted, that is, passed through
Feedback signal turns reference signal down that (feedback signal is equal with reference signal, when being adjusted, can be adjusted according to feedback signal
Whole reference signal), initial value is returned to, vice versa.So it can detect whether reference signal occurs under various circumstances
Drift, and the reference signal to drifting about adjusts accordingly, and ensures that reference signal maintains reference level, improves touch-control spirit
Sensitivity.
Based on same inventive concept, the embodiments of the invention provide a kind of touch-screen, including it is provided in an embodiment of the present invention
Above-mentioned touch-control compensation circuit.Because the principle of touch-screen solution problem is similar to touch-control compensation circuit, therefore the touch-screen
Implementation may refer to the implementation of above-mentioned touch-control compensation circuit, repeats part and repeats no more.
Based on same inventive concept, the embodiments of the invention provide a kind of display device, including the embodiment of the present invention to provide
Above-mentioned touch-screen.The display device can be：Mobile phone, tablet personal computer, television set, display, notebook computer, digital phase
Any product or part with display function such as frame, navigator.Because the display device solves the principle and touch-screen of problem
It is similar, therefore the implementation of the display device may refer to the implementation of above-mentioned touch-screen, repeats part and repeats no more.
The embodiments of the invention provide a kind of touch-control compensation circuit, its compensation method, touch-screen and display device, the touch-control
Compensation circuit includes：Charging module, discharge module, comparison module, compensating module and counting module；Wherein, charging module is used for
The signal that power supply signal end is inputted carries out charging storage；Discharge module is used to the signal of charging module charging storage being discharged to
The first input end of comparison module；Comparison module is used to discharge module discharging the signal exported compared with reference signal,
And the magnitude of voltage of the signal exported in discharge module in discharge process exports count signal when reaching the magnitude of voltage of reference signal
To the input of counting module；Counting module is used to be counted according to the count signal that comparison module exports；Compensating module is used
In determining whether reference signal drifts about according to the count results of counting module, and when reference signal is drifted about, according to
The magnitude of voltage of the feedback signal compensated reference signal of output end output；Wherein, the count results of counting module are not equal to benchmark knot
During fruit, determine that reference signal is drifted about.Specifically, the fixed power source signal of power supply signal end input passes through charging module with putting
Electric module is stored and discharged, so by comparison module to fixed power source signal compared with reference signal, pass through meter
Digital-to-analogue block record comparative result, it is determined that it is no generation touch-control when fixed voltage value and reference signal between result of the comparison, i.e.,
Benchmark result when reference signal is not drifted about；When electric jamming be present in external environment, the fixation of power supply signal end input
Power supply signal by charging module, discharge module and comparison module storage, electric discharge, and the reference signal with drifting about it
Between comparison, now the comparative result between fixed voltage signal and reference signal is not equal to benchmark knot to final counting module record
Fruit, you can determine that drift occurs in reference signal, such as cause reference signal that drift change occurs because the external world has electric jamming
When big, now the comparative result of counting module record is less than benchmark result, reference signal can now be entered by compensating module
Row adjustment, i.e., turn reference signal down by feedback signal that (feedback signal is equal with reference signal, can be with when being adjusted
Reference signal is adjusted according to feedback signal), initial value is returned to, vice versa.Ginseng can be so detected under various circumstances
Examine whether signal drifts about, and the reference signal to drifting about adjusts accordingly, and ensures that reference signal maintains benchmark
Level, improve touch-control sensitivity.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these changes and modification.
Claims (12)
- A kind of 1. touch-control compensation circuit, it is characterised in that including：Charging module, discharge module, comparison module, compensating module and Counting module；Wherein,The control terminal of the charging module is connected with control signal end, and input is connected with power supply signal end, output end with it is described The input of discharge module is connected；The charging module is used under the control of the control signal end, by the power supply signal The signal of end input carries out charging storage；The control terminal of the discharge module is connected with the control signal end, output end and the first input end of the comparison module It is connected；The discharge module is used under the control of the control signal end, and the signal stored that the charging module is charged is put The electric first input end to the comparison module；Second input of the comparison module is used for input reference signal, output end and the input phase of the counting module Even；The comparison module is used to the discharge module discharging the signal exported compared with the reference signal, and in institute When stating the magnitude of voltage of the signal exported in discharge module discharge process and reaching the magnitude of voltage of the reference signal, count signal is exported To the input of the counting module；The counting module is used to be counted according to the count signal that the comparison module exports；The input of the compensating module is used to input the reference signal, and output end is used for output feedback signal；The compensation Module is used to determine whether the reference signal drifts about according to the count results of the counting module, and described with reference to letter When number drifting about, the feedback signal exported according to output end compensates the magnitude of voltage of the reference signal；Wherein, the count module When the count results of block are not equal to benchmark result, determine that the reference signal is drifted about.
- 2. touch-control compensation circuit as claimed in claim 1, it is characterised in that the charging module, specifically include：First switch Device, the first electric capacity and first resistor；Wherein,One end of first electric capacity is connected with ground level signal end, and the other end is connected with one end of the first resistor；The other end of the first resistor respectively with the output end of the first switch device and the input of the discharge module It is connected；The control terminal of the first switch device is connected with the control signal end, and input is connected with the power supply signal end； The first switch device is used to open under the control of the control signal end, the signal inputted by the power supply signal end First electric capacity is charged.
- 3. touch-control compensation circuit as claimed in claim 2, it is characterised in that the first switch device is first switch crystal Pipe；The grid of the first switch transistor is connected with the control signal end, and source electrode is connected with the power supply signal end, drain electrode It is connected with the input of the discharge module.
- 4. touch-control compensation circuit as claimed in claim 3, it is characterised in that the charging module is additionally operable to sense extraneous touch-control Situation, and when touch-control occurs, the charging module also includes：Inductance capacitance and inductive reactance；One end of the inductance capacitance is connected with one end of the inductive reactance, other end one end with first electric capacity respectively It is connected with one end of the first resistor；The other end of the inductive reactance is connected with the other end of first electric capacity and the ground level signal end respectively.
- 5. touch-control compensation circuit as claimed in claim 1, it is characterised in that the discharge module, specifically include：Second switch Device；The control terminal of the second switch device is connected with the control signal end, the output end of input and the charging module It is connected, output end is connected with the first input end of the comparison module；The second switch device is used in the control signal Opened under the control at end, the signal stored that the charging module is charged is discharged to the first input end of the comparison module.
- 6. touch-control compensation circuit as claimed in claim 5, it is characterised in that the second switch device is second switch crystal Pipe；The grid of the second switch transistor is connected with the control signal end, the output end phase of source electrode and the charging module Even, drain electrode is connected with the first input end of the comparison module.
- 7. touch-control compensation circuit as claimed in claim 1, it is characterised in that the compensating module, specifically include：First compares Device, the second electric capacity and feedback capacity；Wherein,The positive input of the first comparator is connected with ground level signal end, negative-phase input respectively with second electric capacity One end be connected with one end of the feedback capacity, and negative input is used to input the reference signal, and output end is used for defeated Go out feedback signal；The other end of second electric capacity is connected with the ground level signal end；The other end of the feedback capacity is connected with the output end of the first comparator.
- 8. touch-control compensation circuit as claimed in claim 1, it is characterised in that the comparison module, specifically include：Second compares Device；The positive input of second comparator is used to input the reference signal, negative input and the discharge module Output end is connected, and output end is connected with the input of the counting module.
- 9. the touch-control compensation circuit as described in claim any one of 1-8, it is characterised in that also include：Display module；The display module is used to be shown the count results of the counting module.
- A kind of 10. compensation method of the touch-control compensation circuit as described in claim any one of 1-9, it is characterised in that including：Charging storage is carried out to the signal of power supply signal end input；The signal of charging storage is discharged；By the signal for output of discharging compared with the reference signal, and the magnitude of voltage of the signal exported in discharge process reaches To the reference signal magnitude of voltage when, export count signal；Counted according to the count signal；When determining that the reference signal is drifted about according to count results, the voltage of the reference signal is compensated according to feedback signal Value；Wherein, when the count results are not equal to benchmark result, determine that the reference signal is drifted about.
- 11. a kind of touch-screen, it is characterised in that including the touch-control compensation circuit as described in claim any one of 1-9.
- 12. a kind of display device, it is characterised in that including touch-screen as claimed in claim 11.
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| DE112016006605T5 (en) * | 2016-03-15 | 2018-11-22 | Olympus Corporation | Touch panel device and method for operating a touch panel device |
| CN106020548B (en) * | 2016-05-27 | 2019-02-22 | 京东方科技集团股份有限公司 | A kind of touch control detection device, touch control display apparatus and touch control detecting method |
| CN110262697B (en) * | 2019-06-24 | 2024-06-21 | 努比亚技术有限公司 | Touch data compensation method, touch screen terminal and computer readable storage medium |
| CN114499486B (en) * | 2021-09-06 | 2023-03-21 | 上海芯圣电子股份有限公司 | Anti-noise touch key integrated circuit |
| CN113934322B (en) * | 2021-10-13 | 2024-04-05 | 珠海格力电器股份有限公司 | Touch drift calibration method and device of touch screen, storage medium and touch screen |
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