CN110196657A - Common voltage generation circuit, common voltage generation method and touch-control display panel - Google Patents
Common voltage generation circuit, common voltage generation method and touch-control display panel Download PDFInfo
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- CN110196657A CN110196657A CN201910430298.2A CN201910430298A CN110196657A CN 110196657 A CN110196657 A CN 110196657A CN 201910430298 A CN201910430298 A CN 201910430298A CN 110196657 A CN110196657 A CN 110196657A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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Abstract
The invention discloses the common voltage generation methods of a kind of common voltage generation circuit and the application common voltage generation circuit, which common voltage default first, the real-time change waveform of virtual voltage in touch control electrode under default common voltage environment is detected and is recorded in again, the factors such as the delay in conjunction with predetermined waveform and panel signal transmission system, common voltage waveform after calculation optimization, so that touch control electrode is consistent by the virtual voltage waveform after each row Gate Couple, so as to improve band problem near touch control electrode boundary, being able to suppress the factors such as other signal interferences causes voltage fluctuation simultaneously；The invention also discloses the touch-control display panels including the common voltage generation circuit.
Description
Technical field
The present invention relates to field of display technology more particularly to a kind of common voltage generation circuits, common voltage generation method
And touch-control display panel.
Background technique
The integrated level of panel can be improved not only to reduce cost in In-cell touch panel technology, can also preferably meet use
The family demand lightening to electronic equipment.As shown in Figure 1, existing In-cell touch panel technology usually public electrode is divided into it is small
Block corresponds to multiple pixel units as touch control electrode (Sensor) 11, each touch control electrode, and driving chip 13 (IC) passes through touching
It controls signal transmssion line 12 and conveys touching signals to touch control electrode.
Fig. 2 is the structural schematic diagram of two neighboring touch control electrode 12, and Fig. 3 is a touch control electrode 12 in touch-control display panel
Corresponding public voltage signal waveform is respectively certain moment touch control electrode in Fig. 3 from left to right by top edge to center row again extremely
The common voltage situation of change at edge correspondingly also illustrates touch control electrode top edge, center row and lower edge in Fig. 3
Scanning signal waveform corresponding to pixel unit.In existing touch-control display panel, exists between scan line and touch control electrode and hand over
Folded capacitor (Gate Couple) will cause the voltage in touch control electrode to be jumped when the voltage jump in scan line by coupling
Become.Comparative diagram 2 and Fig. 3, declining caused Couple positioned at the scanning signal (such as Gn) of horizontal scanning line among touch control electrode can quilt
Thereafter Couple caused by the scanning signal (such as Gn+2) of certain horizontal scanning line rises is offset；And it is several to the inverse on touch control electrode boundary
For horizontal scanning line, corresponding rear horizontal scanning line is located under the covering of next touch control electrode, can not offset with its Couple
Disappear.This boundary and internal couple different can cause the pixel unit at touch control electrode edge and the touch-control electricity of interior pixels unit
The difference of pole tension change shape eventually leads to the difference of voltage suffered by touch control electrode center row and border row pixel unit liquid crystal
It is different, so that forming band in touch control electrode intersection.
Summary of the invention
The present invention provides a kind of common voltage generation circuit, common voltage generation method and touch-control display panels, with solution
Certainly band problem near touch control electrode boundary, while being able to suppress the factors such as other signal interferences and causing voltage fluctuation.
Technical solution provided by the invention is as follows:
The invention discloses a kind of common voltage generation circuits, for public voltage signal after generation adjustment and are inputted
Touch-control display panel, including multipair public voltage signal line, preset signals generation module, public voltage signal adjustment module and
Memory module, each pair of public voltage signal line include that the bars transmission line for being connected to same touch control electrode and a bars are visited
Survey line, the signal transmssion line and signal detection line are connected to the same touch control electrode of touch-control display panel；The preset signals
Generation module is electrically connected with signal transmssion line and signal detection line, and pre- to signal transmssion line and the output of signal detection line
If public voltage signal；The signal transmssion line and signal detection line in the default stage receive default public voltage signal and to institutes
State touch control electrode output；The signal transmssion line the detection phase receive default public voltage signal and to the touch control electrode it is defeated
Out, the signal detection line detects the actual measurement public voltage signal of the touch control electrode in the detection phase, and will survey common electrical
Pressure signal is transmitted to public voltage signal adjustment module；The public voltage signal adjustment module is according to actual measurement public voltage signal
Public voltage signal after adjusting is calculated with default public voltage signal, and public voltage signal write-in after adjustment is stored into mould
Block；Memory module and signal transmssion line and signal detection line are electrically connected, and the public voltage signal after the display stage will adjust
Input signal transmission line and signal detection line.
Preferably, the public voltage signal adjustment module includes analogue delay submodule, Delay computing submodule, amplitude
Computational submodule and signal generate submodule；Analogue delay submodule receives the actual measurement public voltage signal, simulates touch-control
Public voltage signal is simulated in output after the capacitor and resistance of display panel carry out Delay computing to actual measurement public voltage signal；Delay
Delay time is calculated according to actual measurement public voltage signal and simulation public voltage signal in computational submodule；Crest meter operator mould
Root tuber factually surveys public voltage signal and simulation public voltage signal setting amplitude proportion；When signal generates submodule according to delay
Between, amplitude proportion, actual measurement public voltage signal and default public voltage signal calculate adjustment after public voltage signal.
Preferably, the analogue delay submodule is the N rank RC that is built according to the capacitor of touch-control display panel, resistance value
Circuit, N are positive integer.
Preferably, public voltage signal meets after the adjustment:
V_4 (t)=AV_3 (t+2 Δ t ± δ t)+AV_0 (± 0.5 δ t of t+ Δ t)；
Wherein, V_4 (t) is public voltage signal after adjustment, and V_3 (t) is actual measurement public voltage signal, and V_0 (t) is default
Public voltage signal, Δ t are delay time, and δ t is to trim values made by Δ t.
Preferably, the public voltage signal adjustment module includes analogue delay submodule, Delay computing submodule, amplitude
Computational submodule, regulatory factor setting submodule and signal generate submodule；It is public that analogue delay submodule receives the actual measurement
Common voltage signal, the capacitor and resistance for simulating touch-control display panel export mould after carrying out Delay computing to actual measurement public voltage signal
Quasi- public voltage signal；Delay computing submodule is calculated and prolongs according to actual measurement public voltage signal and simulation public voltage signal
The slow time；Amplitude proportion is arranged according to actual measurement public voltage signal and simulation public voltage signal in amplitude computational submodule；It adjusts
Factor setting submodule is for setting regulatory factor；Signal generates submodule according to delay time, amplitude proportion, actual measurement common electrical
Signal, Dynamic gene and default public voltage signal is pressed to calculate public voltage signal after adjustment.
Preferably, public voltage signal meets after the adjustment:
V_4 (t)=AV_3 (t+2 Δ t ± δ t)+xAV_0 (t)+AV_0 (± 0.5 δ t of t+ Δ t)；
Wherein, V_4 (t) is public voltage signal after adjustment, and V_3 (t) is actual measurement public voltage signal, when Δ t is delay
Between, δ t is to trim values made by Δ t, and V_0 (t) is default public voltage signal, and x is regulatory factor.
Preferably, public voltage signal adjustment module include frequency domain transform subblock, transmission function computational submodule,
Frequency-region signal generates submodule and time domain transform subblock；Frequency domain transform subblock is converted to default public voltage signal pre-
If frequency domain common voltage function, actual measurement public voltage signal is converted into actual measurement frequency domain common voltage function；Transmission function calculates
Design value of the submodule according to touch-control display panel or the data calculation of transfer function to panel detection acquisition, transmission function are used for
Signal delay on transmission line analog signal；Frequency-region signal generates submodule according to default frequency domain common voltage function, actual measurement frequency
Domain common voltage function and transmission function calculate frequency domain common voltage function after adjustment；Frequency domain after time domain transform subblock will adjust
Common voltage function public voltage signal and exports after being converted to adjustment.
Preferably, frequency domain public voltage signal meets after the adjustment:
F_4 (w)=" " F_0 (w)+(F_0 (w))/H (jw)-(F_3 (w))/" H (jw) " ^2；
Wherein, F_4 (w) is frequency domain common voltage function after adjustment, and F_0 (w) is default frequency domain common voltage function, F_3
It (w) is actual measurement frequency domain common voltage function, H (jw) is transmission function, and w is frequency independent variable.
Preferably, public voltage signal adjustment module include frequency domain transform subblock, transmission function computational submodule,
Frequency domain regulatory factor sets submodule, frequency-region signal generates submodule and time domain transform subblock；Frequency domain transform subblock will
Default public voltage signal is converted to default frequency domain common voltage function, and it is public that actual measurement public voltage signal is converted to actual measurement frequency domain
Common voltage function；Design value of the transmission function computational submodule according to touch-control display panel or the data meter to panel detection acquisition
Transmission function is calculated, transmission function is for the signal delay on transmission line analog signal；Frequency domain regulatory factor setting submodule is used for
Set frequency domain regulatory factor；Frequency-region signal generates submodule according to default frequency domain common voltage function, actual measurement frequency domain common voltage
Function, transmission function and regulatory factor calculate frequency domain common voltage function after adjustment；Frequency domain after time domain transform subblock will adjust
Common voltage function public voltage signal and exports after being converted to adjustment.
Preferably, frequency domain public voltage signal meets after the adjustment:
F_4 (w)=F_0 (w) (2+jwy τ)-F_3 (w) (2+jwy τ) ^2；
Wherein, F_4 (w) is frequency domain common voltage function after adjustment, and F_0 (w) is default frequency domain common voltage function, F_3
It (w) is actual measurement frequency domain common voltage function, y is frequency domain regulatory factor, and w is frequency independent variable, and τ=R*C, R are that panel estimation is total
Resistance, C are that panel estimates total capacitance.
The invention also discloses a kind of touch-control display panels, including public electrode, criss-cross scan line and data line
And the pixel unit limited is intersected by scan line and data line, public electrode is divided into multiple touch control electrodes, each touch-control electricity
Pole corresponds to multiple pixel units, further includes above-mentioned common voltage generation circuit.
The invention also discloses a kind of common voltage generation methods, suitable for above-mentioned common voltage generation circuit, including
Following steps:
S1: in the default stage, preset signals generation module generates default public voltage signal, and is inputted signal transmission
Line and signal detection line；
S2: selecting multiple touch control electrodes on touch-control display panel, and the pixel corresponding to those touch control electrodes has charged
At preceding switching to the detection phase；In the detection phase, signal detection line switches to acquisition mode by preset state, passes through signal detection
Line detects the voltage of touch control electrode, and the waveform that signal detection line finally detects is actual measurement public voltage signal, and record actual measurement is public
Common voltage signal is until after pixel charging complete corresponding to those touch control electrodes for a period of time；
S3: public voltage signal adjusts module and receives actual measurement public voltage signal and default public voltage signal, according to reality
It surveys public voltage signal and public voltage signal after adjustment is calculated in default public voltage signal；And common voltage after adjusting
Memory module is written in signal.
Preferably, the step S3 specifically includes the following steps:
S311: the analogue delay submodule that public voltage signal adjusts module receives the actual measurement public voltage signal, mould
Common voltage letter is simulated in output after the capacitor and resistance of quasi- touch-control display panel carry out Delay computing to actual measurement public voltage signal
Number；
S312: phase shift computational submodule is calculated and prolongs according to actual measurement public voltage signal and simulation public voltage signal
The slow time；Amplitude proportion is arranged according to actual measurement public voltage signal and simulation public voltage signal in amplitude computational submodule；
S313: signal generates submodule according to delay time, amplitude proportion, actual measurement public voltage signal and default common electrical
It presses signal to calculate public voltage signal after adjustment, and memory module is written into public voltage signal after adjustment；Common electrical after adjustment
Signal is pressed to meet:
V_4 (t)=AV_3 (t+2 Δ t ± δ t)+AV_0 (± 0.5 δ t of t+ Δ t)；
Wherein, V_4 (t) is public voltage signal after adjustment, and V_3 (t) is actual measurement public voltage signal, and V_0 (t) is default
Public voltage signal, Δ t are delay time, and δ t is to trim values made by Δ t.
Preferably, the step S3 specifically includes the following steps:
S131: the analogue delay submodule that public voltage signal adjusts module receives the actual measurement public voltage signal, mould
Common voltage letter is simulated in output after the capacitor and resistance of quasi- touch-control display panel carry out Delay computing to actual measurement public voltage signal
Number；
S132: phase shift computational submodule is calculated and prolongs according to actual measurement public voltage signal and simulation public voltage signal
The slow time；Amplitude proportion is arranged according to actual measurement public voltage signal and simulation public voltage signal in amplitude computational submodule；It adjusts
The factor sets submodule and sets regulatory factor；
S133: signal generate submodule according to delay time, amplitude proportion, actual measurement public voltage signal, Dynamic gene and
Default public voltage signal calculates public voltage signal after adjustment, and memory module is written in public voltage signal after adjustment；It adjusts
Public voltage signal meets after whole:
V_4 (t)=AV_3 (t+2 Δ t ± δ t)+xAV_0 (t)+AV_0 (± 0.5 δ t of t+ Δ t)；
Wherein, V_4 (t) is public voltage signal after adjustment, and V_3 (t) is actual measurement public voltage signal, when Δ t is delay
Between, δ t is to trim values made by Δ t, and V_0 (t) is default public voltage signal, and x is regulatory factor.
Preferably, the step S3 specifically includes the following steps:
S321: default public voltage signal is converted to default frequency domain common voltage function by frequency domain transform subblock, will be real
It surveys public voltage signal and is converted to actual measurement frequency domain common voltage function；
S322: design value of the transmission function computational submodule according to touch-control display panel or the data to panel detection acquisition
Calculation of transfer function, frequency-region signal generate submodule according to default frequency domain common voltage function, actual measurement frequency domain common voltage function
Frequency domain common voltage function after adjusting is calculated with transmission function, frequency domain common voltage function meets after adjustment:
F_4 (w)=" " F_0 (w)+(F_0 (w))/H (jw)-(F_3 (w))/" H (jw) " ^2
Wherein, F_4 (w) is frequency domain common voltage function after adjustment, and F_0 (w) is default frequency domain common voltage function, F_3
It (w) is actual measurement frequency domain common voltage function, H (jw) is transmission function, and w is frequency independent variable；
S323: time domain transform subblock by frequency domain common voltage function after adjustment be converted to adjustment after public voltage signal,
And memory module is written in public voltage signal after adjusting.
Preferably, the step S3 specifically includes the following steps:
S321: default public voltage signal is converted to default frequency domain common voltage function by frequency domain transform subblock, will be real
It surveys public voltage signal and is converted to actual measurement frequency domain common voltage function；
S322: design value of the transmission function computational submodule according to touch-control display panel or the data to panel detection acquisition
Calculation of transfer function, frequency domain regulatory factor set submodule and set frequency domain regulatory factor y；Frequency-region signal generates submodule according to pre-
If frequency domain common voltage function, actual measurement frequency domain common voltage function, transmission function and frequency domain regulatory factor calculate frequency domain after adjustment
Common voltage function, frequency domain common voltage function meets after adjustment:
F_4 (w)=F_0 (w) (2+jwy τ)-F_3 (w) (2+jwy τ) ^2；
Wherein, F_4 (w) is frequency domain common voltage function after adjustment, and F_0 (w) is default frequency domain common voltage function, F_3
It (w) is actual measurement frequency domain common voltage function, y is frequency domain regulatory factor, and w is frequency independent variable, and τ=R*C, R are that panel estimation is total
Resistance, C are that panel estimates total capacitance；
S323: time domain transform subblock by frequency domain common voltage function after adjustment be converted to adjustment after public voltage signal,
And memory module is written in public voltage signal after adjusting.
The present invention can bring it is at least one of following the utility model has the advantages that
Common voltage generation method of the invention common voltage default first, then detect and be recorded in default common electrical pressure ring
Under border in touch control electrode virtual voltage real-time change waveform, in conjunction with predetermined waveform and the delay of panel signal transmission system etc.
Factor, the common voltage waveform after calculation optimization, so that touch control electrode is by the virtual voltage waveform after each row Gate Couple
Unanimously, so as to improve band problem near touch control electrode boundary, while the factors such as other signal interferences is able to suppress and cause voltage
Fluctuation.
Detailed description of the invention
Below by clearly understandable mode, preferred embodiment is described with reference to the drawings, the present invention is given furtherly
It is bright.
Fig. 1 is a kind of structural schematic diagram of In-cell touch display panel of the prior art；
Fig. 2 is the structural schematic diagram of two neighboring touch control electrode in touch-control display panel shown in Fig. 1；
Fig. 3 is the corresponding public voltage signal of touch control electrode a certain in touch-control display panel shown in Fig. 1 and scanning signal wave
Shape schematic diagram；
Fig. 4 is the structural schematic diagram of common voltage generation circuit of the invention；
Fig. 5 is the signal transition diagram according to the common voltage generation circuit of present invention implementation one；
Fig. 6 is the flow diagram according to the common voltage generation method of present invention implementation one；
Fig. 7 is the waveform diagram of multiple voltage signals in the common voltage generation circuit for implement one according to the present invention；
Fig. 8 is the signal transition diagram according to the common voltage generation circuit of present invention implementation two；
Fig. 9 is the flow diagram according to the common voltage generation method of present invention implementation two.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
It the present invention rather than limits the scope of the invention, after the present invention has been read, those skilled in the art are to of the invention each
The modification of kind equivalent form falls within the application range as defined in the appended claims.
To make simplified form, part related to the present invention is only schematically shown in each figure, they are not represented
Its practical structures as product.In addition, there is identical structure or function in some figures so that simplified form is easy to understand
Component only symbolically depicts one of those, or has only marked one of those.Herein, "one" is not only indicated
" only this ", can also indicate the situation of " more than one ".
Common voltage generation circuit of the invention is for generating public voltage signal after adjustment and being inputted touch-control and show
Panel, touch-control display panel include public electrode, criss-cross scan line and data line and are handed over by scan line and data line
The pixel unit limited is pitched, public electrode is divided into multiple touch control electrodes 12 (Sensor), and each touch control electrode 12 corresponds to more
A pixel unit.
Fig. 4 show a kind of structural schematic diagram of common voltage generation circuit of the present invention, and common voltage generation circuit includes
Multipair public voltage signal line, preset signals generation module 10, public voltage signal adjustment module 20 and memory module 30, often
It include the bars transmission line 41 and bars detection line 42 for being connected to same touch control electrode 12 to public voltage signal line.
Preset signals generation module 10 and signal transmssion line 41 and signal detection line 42 are electrically connected, and to signal transmssion line
41 and signal detection line 42 export default public voltage signal；
Signal transmssion line 41 and signal detection line 42, which export in the default stage to touch control electrode 12, presets public voltage signal；
Signal transmssion line 41 exports default public voltage signal V to touch control electrode 12 in the detection phase0(t), signal detection
Line 42 detects the actual measurement public voltage signal V of the touch control electrode 12 in the detection phase3(t), and public voltage signal V will be surveyed3
(t) it is transmitted to public voltage signal adjustment module 20；
Public voltage signal adjusts module 20 according to actual measurement public voltage signal V3(t) and default public voltage signal V0(t)
Public voltage signal V after adjusting is calculated4(t), and will adjustment after public voltage signal V4(t) memory module 30 is written；
Memory module 30 and signal transmssion line 41 and signal detection line 42 are electrically connected, and public after the display stage will adjust
Common voltage signal V4(t) input signal transmission line 41 and signal detection line 42.
Common voltage generation circuit combines RC retardation ratio to be calculated to Gate Couple etc. in default stage and detection phase
Public voltage signal V after the compensated adjustment of factor4(t), by public voltage signal V after adjustment4(t) memory module 30 is written.?
Public voltage signal V after subsequent display stage, signal transmssion line 41 and signal detection line 42 will adjust4(t) input touch-control electricity
Pole 12, so that each region of touch control electrode 12 is consistent by the practical common voltage waveform after Gate Couple, so as to improve touch-control
The problem of 12 intersection band of electrode, while being able to suppress the factors such as other signal interferences and causing voltage fluctuation.
Embodiment one:
The public voltage signal adjustment module 20 of the present embodiment includes analogue delay submodule, Delay computing submodule, width
It is worth computational submodule and signal generates submodule；
Analogue delay submodule receives the actual measurement public voltage signal, simulates the capacitor and resistance pair of touch-control display panel
It surveys public voltage signal and carries out output simulation public voltage signal after Delay computing；
Delay time is calculated according to actual measurement public voltage signal and simulation public voltage signal in Delay computing submodule；
Amplitude proportion is arranged according to actual measurement public voltage signal and simulation public voltage signal in amplitude computational submodule；
Signal generates submodule to be believed according to delay time, amplitude proportion, actual measurement public voltage signal and default common voltage
Number calculate adjustment after public voltage signal.
Fig. 5 show the signal transition diagram using the common voltage generation circuit of the present embodiment, and Fig. 6 show application
The flow diagram of the common voltage generation method of the common voltage generation circuit of the present embodiment.Comparative diagram 5 and Fig. 6, this implementation
In also disclose a kind of common voltage generation method, comprising the following steps:
S1: in the default stage, preset signals generation module 10 generates default public voltage signal V0(t), it and is inputted
Signal transmssion line 41 and signal detection line 42 preset public voltage signal V0(t) through signal transmssion line 41 or signal detection line 42
On RC retardation ratio (abbreviation Sx Delay) become the first delay public voltage signal V1(t), plus Gate Couple and other
After signal interference factor (abbreviation Couple&SI), the virtual voltage in touch control electrode 12 is the second delay public voltage signal V2
(t)；
S2: selecting multiple touch control electrodes 12 on touch-control display panel, the picture corresponding to the multiple touch control electrode 12
The detection phase is switched to before plain charging complete；In the detection phase, signal detection line 42 switches to acquisition mode by preset state, leads to
The voltage that signal detection line 42 detects touch control electrode 12 is crossed, due to the RC retardation ratio on signal detection line 42, signal detection line 42 is most
The waveform detected eventually is actual measurement public voltage signal V3(t), record actual measurement public voltage signal V3(t) until the multiple touching
A period of time after pixel charging complete corresponding to control electrode 12；
S3: public voltage signal adjusts module 20 and receives actual measurement public voltage signal V3(t) and default public voltage signal V0
(t), according to actual measurement public voltage signal V3(t) and default public voltage signal V0(t) public voltage signal after adjusting is calculated
V4(t)；And public voltage signal V after adjusting4(t) memory module 30 is written.
Specifically, step S3 the following steps are included:
S311: the analogue delay submodule that public voltage signal adjusts module 20 receives the actual measurement public voltage signal V3
(t), the capacitor and resistance for simulating touch-control display panel are to actual measurement public voltage signal V3(t) simulation is exported after carrying out Delay computing
Public voltage signal Vx(t)；Wherein, analogue delay submodule the capacitor of touch-control display panel, resistance value can be taken according to
The N rank RC circuit built, N is positive integer, preferentially N=10；
S312: phase shift computational submodule is according to actual measurement public voltage signal V3(t) and simulation public voltage signal Vx(t)
Delay time Δ t is calculated；Amplitude computational submodule is according to actual measurement public voltage signal V3(t) and simulation public voltage signal
Vx(t) amplitude proportion A is set；Amplitude proportion A is negative, can be -1, but not limited to this；
S313: signal generates submodule according to delay time Δ t, amplitude proportion A, actual measurement public voltage signal V3(t) and
Default public voltage signal V0(t) public voltage signal V after adjusting is calculated4(t), and will adjustment after public voltage signal V4(t) it writes
Enter memory module 30；Public voltage signal V after adjustment4(t) meet:
V4(t)=AV3(t+2Δt±δt)+AV0(t+Δt±0.5δt)；
Wherein, V4It (t) is public voltage signal after adjustment, V3It (t) is actual measurement public voltage signal, V0(t) public to preset
Voltage signal, Δ t are delay time, and δ t is according to actual effect to trim values made by Δ t.Default public voltage signal V0
It (t) can be with 0, steady state value or the function of time.
Preferably, public voltage signal adjustment module 20 further includes regulatory factor setting submodule, regulatory factor setting
Module is for setting regulatory factor x；Regulatory factor setting submodule sets regulatory factor x, above-mentioned steps in above-mentioned steps S312
Signal generates submodule according to delay time Δ t, amplitude proportion A, actual measurement public voltage signal V in 3133(t), Dynamic gene x
With default public voltage signal V0(t) public voltage signal V after adjusting is calculated4(t) it and exports；Public voltage signal V after adjustment4
(t) meet:
V4(t)=AV3(t+2Δt±δt)+xAV0(t)+AV0(t+Δt±0.5δt)；
Wherein, V4It (t) is public voltage signal after adjustment, V3It (t) is actual measurement public voltage signal, Δ t is delay time, δ
T is according to actual effect to trim values made by Δ t, V0It (t) is default public voltage signal, x is regulatory factor.It presets public
Voltage signal V0It (t) can be with 0, steady state value or the function of time.
As shown in figure 5, in the display stage, public voltage signal V after memory module 30 will adjust4(t) input signal is transmitted
Line 41 and signal detection line 42, public voltage signal V after adjustment4(t) through the RC on signal transmssion line 41 or signal detection line 42
Delay becomes third delay public voltage signal V5(t), after plus Gate Couple and other signal interference factors, touch-control
Virtual voltage on electrode 12 is V0(t), V0It (t) is the consistent target of common voltage waveform for making each region of touch control electrode 12
Common voltage.
In the present embodiment, public voltage signal V is preset0(t), public voltage signal V is surveyed3(t), common voltage after adjusting
Signal V4(t) and will adjustment after public voltage signal V4(t) measurement voltage after input touch-control display panel in touch control electrode 12
Signal is as shown in Figure 7.
Embodiment two
The public voltage signal adjustment module 20 of the present embodiment includes frequency domain transform subblock, analogue delay submodule, passes
Delivery function computational submodule, frequency-region signal generate submodule and time domain transform subblock；
Default public voltage signal is converted to default frequency domain common voltage function by frequency domain transform subblock, will be surveyed public
Voltage signal is converted to actual measurement frequency domain common voltage function；
Transmission function computational submodule is calculated according to the design value of touch-control display panel or to the data that panel detection obtains
Transmission function, transmission function is for the signal delay on transmission line analog signal 41；
Frequency-region signal generates submodule according to default frequency domain common voltage function, actual measurement frequency domain common voltage function and transmitting
Function calculates frequency domain common voltage function after adjustment；
Time domain transform subblock public voltage signal and exports after frequency domain common voltage function after adjustment is converted to adjustment.
Fig. 8 show the signal transition diagram using the common voltage generation circuit of the present embodiment, and Fig. 9 show application
The flow diagram of the common voltage generation method of the present embodiment common voltage generation circuit.Comparative diagram 8 and Fig. 9, in this implementation
Also disclose a kind of common voltage generation method, comprising the following steps:
S1: in the default stage, preset signals generation module 10 generates default public voltage signal V0(t), it and is inputted
Signal transmssion line 41 and signal detection line 42 preset public voltage signal V0(t) through signal transmssion line 41 or signal detection line 42
On RC retardation ratio become the first delay public voltage signal V1(t), plus Gate Couple and other signal interference factors
Afterwards, the virtual voltage in touch control electrode 12 is the second delay public voltage signal V2(t)；
From frequency domain angle, above-mentioned steps are equivalent to default frequency domain common voltage function F0(w) at through transfer function H (jw)
It is changed into the first delay frequency domain common voltage function F after reason1(w), wherein transfer function H (jw) is used for transmission line analog signal 41
On signal delay；After plus Gate Couple and other signal interference factors, the virtual voltage in touch control electrode 12 meets
Second delay common voltage function is F2(w)；
S2: selecting multiple touch control electrodes 12 on touch-control display panel, and the pixel corresponding to those touch control electrodes 12 is filled
Electricity switches to the detection phase before completing；In the detection phase, signal detection line 42 switches to acquisition mode by preset state, passes through letter
Number detection line 42 detects the voltage of touch control electrode 12, and due to the RC retardation ratio on signal detection line 42, signal detection line 42 is finally visited
The waveform measured is actual measurement public voltage signal V3(t)；Record actual measurement public voltage signal V3(t) until those touch control electrodes 12
A period of time after corresponding pixel charging complete；
S3: public voltage signal adjusts module 20 and receives actual measurement public voltage signal V3(t), according to actual measurement common voltage letter
Number V3(t) and default public voltage signal V0(t) public voltage signal V after adjusting is calculated4(t)；And it is public after and adjusting
Common voltage signal V4(t) memory module 30 is written.
Specifically, step S3 the following steps are included:
S321: frequency domain transform subblock is by default public voltage signal V0(t) default frequency domain common voltage function F is converted to0
(w), public voltage signal V will be surveyed3(t) actual measurement frequency domain common voltage function F is converted to3(w)；
S322: design value of the transmission function computational submodule according to touch-control display panel or the data to panel detection acquisition
Calculation of transfer function H (jw), frequency-region signal generate submodule according to default frequency domain common voltage function F0(w), actual measurement frequency domain is public
Common voltage function F3(w) and transfer function H (jw) calculates frequency domain common voltage function F after adjustment4(w), frequency domain common electrical after adjustment
Press function F4(w) meet:
Wherein, F4It (w) is frequency domain common voltage function after adjustment, F0It (w) is default frequency domain common voltage function, F3(w) it is
Frequency domain common voltage function is surveyed, H (jw) is transmission function, and w is frequency independent variable；
S323: frequency domain common voltage function F after time domain transform subblock will adjust4(w) common voltage after adjusting is converted to
Signal V4(t), and will adjustment after public voltage signal V4(t) memory module 30 is written.
In above-mentioned steps S322, transmission function computational submodule is according to the design value of touch-control display panel or to panel detection
The data of acquisition establish single order or multistage RC model with the delay on transmission line analog signal 41.
Preferably, public voltage signal adjustment module 20 further include frequency domain regulatory factor setting submodule, frequency domain adjust because
Son setting submodule is for setting frequency domain regulatory factor y；Above-mentioned steps S322 frequency domain regulatory factor sets submodule setting frequency
Domain regulatory factor y, and frequency-region signal generates submodule according to default frequency domain common voltage function F0(w), frequency domain common electrical is surveyed
Press function F3(w), transfer function H (jw) and frequency domain regulatory factor y calculate frequency domain common voltage function F after adjustment4(w)。
For example, transmission function computational submodule is estimated according to single order RC model:And then F4(w)
=F0(w)(2+jwyτ)-F3(w)(2+jwyτ)2.Wherein, F4It (w) is frequency domain common voltage function after adjustment, F0It (w) is default frequency
Domain common voltage function, F3(w) for actual measurement frequency domain common voltage function, y be frequency domain regulatory factor, w be frequency independent variable, τ=
R*C, R are that panel estimates all-in resistance, and C is that panel estimates total capacitance.But it is not limited to single order RC model.
In the display stage, public voltage signal V after memory module 30 will adjust4(t) input signal transmission line 41 and signal
Detect line 42, public voltage signal V after adjustment4(t) become through the RC retardation ratio on signal transmssion line 41 or signal detection line 42
Two delay public voltage signal V5(t), it is equivalent to frequency domain common voltage function F after adjusting4(w) after transfer function H (jw) processing
It is converted into third delay frequency domain common voltage function F5(w), after plus Gate Couple and other signal interference factors, touching
Controlling the virtual voltage on electrode 12 is V0(t), V0It (t) is the consistent mesh of common voltage waveform for making each region of touch control electrode 12
Mark common voltage.
The invention also discloses a kind of touch-control display panels, including public electrode, criss-cross scan line and data line
And the pixel unit limited is intersected by scan line and data line, public electrode is divided into multiple touch control electrodes 12, each touch-control
Electrode 12 corresponds to multiple pixel units, which further includes any of the above-described kind of common voltage generation circuit, public
Signal transmssion line 41 and signal detection line 42 in voltage generation circuit with a pair of public voltage signal line connect same touch-control electricity
Pole 12.
It should be noted that common voltage generation circuit of the invention can be only used for dispatching from the factory previous existence in touch-control display panel
At public voltage signal after adjustment and it is inputted touch-control display panel, it can will be in common voltage generation circuit after the completion of input
Preset signals generation module 10 and public voltage signal adjustment module 20 are separated with touch-control display panel main body, only retain multipair public affairs
Common voltage signal wire and memory module 30 are used for normally display, but not limited to this.
The invention discloses the common voltage lifes of a kind of common voltage generation circuit and the application common voltage generation circuit
At method, this method common voltage default first, then detect and be recorded under default common voltage environment in touch control electrode 12 real
The real-time change waveform of border voltage, in conjunction with factors such as the delays of predetermined waveform and panel signal transmission system, after calculation optimization
Common voltage waveform so that touch control electrode is consistent by the virtual voltage waveform after each row Gate Couple, so as to improve touching
Electrode interface band problem nearby is controlled, while being able to suppress the factors such as other signal interferences and causing voltage fluctuation.
The preferred embodiment of the present invention has been described above in detail, but during present invention is not limited to the embodiments described above
Detail can carry out a variety of equivalents to technical solution of the present invention (in full within the scope of the technical concept of the present invention
Amount, shape, position etc.), these equivalents all belong to the scope of protection of the present invention.
Claims (16)
1. a kind of common voltage generation circuit for public voltage signal after generation adjustment and is inputted touch-control display panel,
It is characterised in that it includes multipair public voltage signal line, preset signals generation module, public voltage signal adjust module and deposit
Store up module, each pair of public voltage signal line includes that a bars transmission line and a bars detect line, the signal transmssion line and
Signal detection line is connected to the same touch control electrode of touch-control display panel；
The preset signals generation module is electrically connected with signal transmssion line and signal detection line and to signal transmssion line and letter
Number detection line exports default public voltage signal；
The signal transmssion line and signal detection line in the default stage receive default public voltage signal and to the touch control electrodes
Output；
The signal transmssion line receives default public voltage signal in the detection phase and exports to the touch control electrode, the signal
Detection line detects the actual measurement public voltage signal of the touch control electrode in the detection phase, and actual measurement public voltage signal is transmitted to
Public voltage signal adjusts module；
Tune is calculated according to actual measurement public voltage signal and default public voltage signal in the public voltage signal adjustment module
Public voltage signal after whole, and memory module is written into public voltage signal after adjustment；
Memory module and signal transmssion line and signal detection line are electrically connected, and the public voltage signal after the display stage will adjust
Input signal transmission line and signal detection line.
2. common voltage generation circuit according to claim 1, which is characterized in that the public voltage signal adjusts module
Submodule is generated including analogue delay submodule, Delay computing submodule, amplitude computational submodule and signal；
Analogue delay submodule receives the actual measurement public voltage signal, and the capacitor and resistance for simulating touch-control display panel are to actual measurement
Public voltage signal carries out output simulation public voltage signal after Delay computing；
Delay time is calculated according to actual measurement public voltage signal and simulation public voltage signal in Delay computing submodule；
Amplitude proportion is arranged according to actual measurement public voltage signal and simulation public voltage signal in amplitude computational submodule；
Signal generates submodule according to delay time, amplitude proportion, actual measurement public voltage signal and default public voltage signal meter
Calculate public voltage signal after adjusting.
3. common voltage generation circuit according to claim 2, it is characterised in that:
The analogue delay submodule is the N rank RC circuit built according to the capacitor of touch-control display panel, resistance value, and N is positive
Integer.
4. common voltage generation circuit according to claim 2, which is characterized in that public voltage signal is full after the adjustment
Foot:
V4(t)=AV3(t+2Δt±δt)+AV0(t+Δt±0.5δt)；
Wherein, V4It (t) is public voltage signal after adjustment, V3It (t) is actual measurement public voltage signal, V0It (t) is default common voltage
Signal, Δ t are delay time, and δ t is to trim values made by Δ t.
5. common voltage generation circuit according to claim 1, which is characterized in that the public voltage signal adjusts module
It is raw including analogue delay submodule, Delay computing submodule, amplitude computational submodule, regulatory factor setting submodule and signal
At submodule；
Analogue delay submodule receives the actual measurement public voltage signal, and the capacitor and resistance for simulating touch-control display panel are to actual measurement
Public voltage signal carries out output simulation public voltage signal after Delay computing；
Delay time is calculated according to actual measurement public voltage signal and simulation public voltage signal in Delay computing submodule；
Amplitude proportion is arranged according to actual measurement public voltage signal and simulation public voltage signal in amplitude computational submodule；
Regulatory factor setting submodule is for setting regulatory factor；
Signal generates submodule according to delay time, amplitude proportion, actual measurement public voltage signal, Dynamic gene and default common electrical
Signal is pressed to calculate public voltage signal after adjustment.
6. common voltage generation circuit according to claim 5, which is characterized in that public voltage signal is full after the adjustment
Foot:
V4(t)=AV3(t+2Δt±δt)+xAV0(t)+AV0(t+Δt±0.5δt)；
Wherein, V4It (t) is public voltage signal after adjustment, V3It (t) is actual measurement public voltage signal, Δ t is delay time, and δ t is
To trim values made by Δ t, V0It (t) is default public voltage signal, x is regulatory factor.
7. common voltage generation circuit according to claim 1, which is characterized in that the public voltage signal adjusts module
Submodule and time domain transform subblock are generated including frequency domain transform subblock, transmission function computational submodule, frequency-region signal；
Default public voltage signal is converted to default frequency domain common voltage function by frequency domain transform subblock, will survey common voltage
Signal is converted to actual measurement frequency domain common voltage function；
Transmission function computational submodule calculates transmitting according to the design value of touch-control display panel or to the data that panel detection obtains
Function, transmission function is for the signal delay on transmission line analog signal；
Frequency-region signal generates submodule according to default frequency domain common voltage function, actual measurement frequency domain common voltage function and transmission function
Calculate frequency domain common voltage function after adjusting；
Time domain transform subblock public voltage signal and exports after frequency domain common voltage function after adjustment is converted to adjustment.
8. common voltage generation circuit according to claim 7, which is characterized in that frequency domain common voltage is believed after the adjustment
Number meet:
Wherein, F4It (w) is frequency domain common voltage function after adjustment, F0It (w) is default frequency domain common voltage function, F3It (w) is actual measurement
Frequency domain common voltage function, H (jw) are transmission function, and w is frequency independent variable.
9. common voltage generation circuit according to claim 1, which is characterized in that the public voltage signal adjusts module
Submodule is generated including frequency domain transform subblock, transmission function computational submodule, frequency domain regulatory factor setting submodule, frequency-region signal
Block and time domain transform subblock；
Default public voltage signal is converted to default frequency domain common voltage function by frequency domain transform subblock, will survey common voltage
Signal is converted to actual measurement frequency domain common voltage function；
Transmission function computational submodule calculates transmitting according to the design value of touch-control display panel or to the data that panel detection obtains
Function, transmission function is for the signal delay on transmission line analog signal；
Frequency domain regulatory factor setting submodule is for setting frequency domain regulatory factor；
Frequency-region signal generates submodule according to default frequency domain common voltage function, actual measurement frequency domain common voltage function, transmission function
Frequency domain common voltage function after adjusting is calculated with regulatory factor；
Time domain transform subblock public voltage signal and exports after frequency domain common voltage function after adjustment is converted to adjustment.
10. common voltage generation circuit according to claim 9, which is characterized in that frequency domain common voltage after the adjustment
Signal meets:
F4(w)=F0(w)(2+jwyτ)-F3(w)(2+jwyτ)2；
Wherein, F4It (w) is frequency domain common voltage function after adjustment, F0It (w) is default frequency domain common voltage function, F3It (w) is actual measurement
Frequency domain common voltage function, y are frequency domain regulatory factor, and w is frequency independent variable, and τ=R*C, R are that panel estimates all-in resistance, and C is face
Plate estimates total capacitance.
11. a kind of touch-control display panel, including public electrode, criss-cross scan line and data line and by scan line sum number
Intersect the pixel unit limited according to line, public electrode is divided into multiple touch control electrodes, and each touch control electrode corresponds to multiple pixels
Unit, which is characterized in that further include such as the described in any item common voltage generation circuits of claim 1-10.
12. a kind of common voltage generation method, is suitable for common voltage generation circuit as described in claim 1, feature exists
In, comprising the following steps:
S1: in the default stage, preset signals generation module generates default public voltage signal, and be inputted signal transmssion line and
Signal detection line；
S2: selecting multiple touch control electrodes on touch-control display panel, before the pixel charging complete corresponding to those touch control electrodes
Switch to the detection phase；In the detection phase, signal detection line switches to acquisition mode by preset state, is visited by signal detection line
The voltage of touch control electrode is surveyed, the waveform that signal detection line finally detects is actual measurement public voltage signal, record actual measurement common electrical
Signal is pressed until after pixel charging complete corresponding to those touch control electrodes for a period of time；
S3: public voltage signal adjusts module and receives actual measurement public voltage signal and default public voltage signal, public according to actual measurement
Public voltage signal after adjustment is calculated in common voltage signal and default public voltage signal；And public voltage signal after adjusting
Memory module is written.
13. common voltage generation method according to claim 12, which is characterized in that the step S3 specifically includes following
Step:
S311: the analogue delay submodule that public voltage signal adjusts module receives the actual measurement public voltage signal, simulation touching
Public voltage signal is simulated in output after the capacitor and resistance for controlling display panel carry out Delay computing to actual measurement public voltage signal；
S312: when delay is calculated according to actual measurement public voltage signal and simulation public voltage signal in phase shift computational submodule
Between；Amplitude proportion is arranged according to actual measurement public voltage signal and simulation public voltage signal in amplitude computational submodule；
S313: signal generates submodule to be believed according to delay time, amplitude proportion, actual measurement public voltage signal and default common voltage
Number calculate adjustment after public voltage signal, and will adjustment after public voltage signal be written memory module；Common voltage is believed after adjustment
Number meet:
V4(t)=AV3(t+2Δt±δt)+AV0(t+Δt±0.5δt)；
Wherein, V4It (t) is public voltage signal after adjustment, V3It (t) is actual measurement public voltage signal, V0It (t) is default common voltage
Signal, Δ t are delay time, and δ t is to trim values made by Δ t.
14. common voltage generation method according to claim 12, which is characterized in that the step S3 specifically includes following
Step:
S131: the analogue delay submodule that public voltage signal adjusts module receives the actual measurement public voltage signal, simulation touching
Public voltage signal is simulated in output after the capacitor and resistance for controlling display panel carry out Delay computing to actual measurement public voltage signal；
S132: when delay is calculated according to actual measurement public voltage signal and simulation public voltage signal in phase shift computational submodule
Between；Amplitude proportion is arranged according to actual measurement public voltage signal and simulation public voltage signal in amplitude computational submodule；Regulatory factor
It sets submodule and sets regulatory factor；
S133: signal generates submodule according to delay time, amplitude proportion, actual measurement public voltage signal, Dynamic gene and presets
Public voltage signal calculates public voltage signal after adjustment, and memory module is written in public voltage signal after adjustment；After adjustment
Public voltage signal meets:
V4(t)=AV3(t+2Δt±δt)+xAV0(t)+AV0(t+Δt±0.5δt)；
Wherein, V4It (t) is public voltage signal after adjustment, V3It (t) is actual measurement public voltage signal, Δ t is delay time, and δ t is
To trim values made by Δ t, V0It (t) is default public voltage signal, x is regulatory factor.
15. common voltage generation method according to claim 12, which is characterized in that the step S3 specifically includes following
Step:
S321: default public voltage signal is converted to default frequency domain common voltage function by frequency domain transform subblock, and actual measurement is public
Common voltage signal is converted to actual measurement frequency domain common voltage function；
S322: transmission function computational submodule is calculated according to the design value of touch-control display panel or to the data that panel detection obtains
Transmission function, frequency-region signal generate submodule according to default frequency domain common voltage function, actual measurement frequency domain common voltage function and biography
Delivery function calculates frequency domain common voltage function after adjustment, and frequency domain common voltage function meets after adjustment:
Wherein, F4It (w) is frequency domain common voltage function after adjustment, F0It (w) is default frequency domain common voltage function, F3It (w) is actual measurement
Frequency domain common voltage function, H (jw) are transmission function, and w is frequency independent variable；
S323: time domain transform subblock by frequency domain common voltage function after adjustment be converted to adjustment after public voltage signal, and will
Memory module is written in public voltage signal after adjustment.
16. common voltage generation method according to claim 12, which is characterized in that the step S3 specifically includes following
Step:
S321: default public voltage signal is converted to default frequency domain common voltage function by frequency domain transform subblock, and actual measurement is public
Common voltage signal is converted to actual measurement frequency domain common voltage function；
S322: transmission function computational submodule is calculated according to the design value of touch-control display panel or to the data that panel detection obtains
Transmission function, frequency domain regulatory factor set submodule and set frequency domain regulatory factor y；Frequency-region signal generates submodule according to default frequency
Frequency domain is public after domain common voltage function, actual measurement frequency domain common voltage function, transmission function and frequency domain regulatory factor calculate adjustment
Function of voltage, frequency domain common voltage function meets after adjustment:
F4(w)=F0(w)(2+jwyτ)-F3(w)(2+jwyτ)2；
Wherein, F4It (w) is frequency domain common voltage function after adjustment, F0It (w) is default frequency domain common voltage function, F3It (w) is actual measurement
Frequency domain common voltage function, y are frequency domain regulatory factor, and w is frequency independent variable, and τ=R*C, R are that panel estimates all-in resistance, and C is face
Plate estimates total capacitance；
S323: time domain transform subblock by frequency domain common voltage function after adjustment be converted to adjustment after public voltage signal, and will
Memory module is written in public voltage signal after adjustment.
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