CN105513527B - A kind of common electric voltage compensation circuit, compensation method and display panel - Google Patents
A kind of common electric voltage compensation circuit, compensation method and display panel Download PDFInfo
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- CN105513527B CN105513527B CN201610076590.5A CN201610076590A CN105513527B CN 105513527 B CN105513527 B CN 105513527B CN 201610076590 A CN201610076590 A CN 201610076590A CN 105513527 B CN105513527 B CN 105513527B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
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Abstract
The invention discloses a kind of common electric voltage compensation circuit, compensation method and display panel, comparison module generates threshold voltage in the common electric voltage compensation circuit, and by the signal of feedback signal terminal compared with threshold voltage, and comparative result is respectively outputted to the first input end and the second input of control module；Control module control signal according to corresponding to the comparative result generation that comparison module exports；Output module thermal compensation signal and exports under the control of corresponding control signal according to corresponding to the signal generation of public voltage signal end and feedback signal terminal.So by comparison module by the signal of feedback signal terminal compared with threshold voltage, control signal corresponding to corresponding comparative result generation, and then thermal compensation signal and exported according to corresponding to the generation of corresponding control signal, the compensation of the fluctuation situation for public voltage signal is realized, the peak voltage that can be so fluctuated to public voltage signal, which is made, rapidly and effectively to be compensated.
Description
Technical field
The present invention relates to display technology field, more particularly to a kind of common electric voltage compensation circuit, compensation method and display surface
Plate.
Background technology
At present, in existing display device, when showing different pictures, the ripple of the public voltage signal in display panel
Dynamic amplitude is different, and as the increase of the electric capacity of transistor in display panel, influence of the pixel voltage to common electric voltage can also increase
Greatly, if common electric voltage fluctuation can not effectively be offset, the display picture of display panel can be caused for example green tinged light occur not
Good phenomenon, in order to improve above mentioned problem, usually, it is necessary to set common electric voltage compensation circuit in a display device.
The general common electric voltage compensation circuit using fixed feedback multiple compensates to common electric voltage in the prior art, with
The fluctuation of common electric voltage is eliminated, but the common electric voltage compensation circuit of fixed feedback multiple can not be to the spike of common electric voltage fluctuation
Voltage, which is made, rapidly and effectively to be compensated, and then have impact on the quality of the display picture of display panel, reduces display picture
Visual effect.
Therefore, how to realize and the peak voltage of common electric voltage fluctuation is fast and effectively compensated, be art technology
Personnel's technical problem urgently to be resolved hurrily.
The content of the invention
It is existing to solve the embodiments of the invention provide a kind of common electric voltage compensation circuit, compensation method and display panel
The peak voltage that the common electric voltage compensation circuit for having fixed feedback multiple present in technology can not fluctuate to common electric voltage is made
The problem of rapidly and effectively compensating.
The embodiments of the invention provide a kind of common electric voltage compensation circuit, including：Comparison module, control module and output mould
Block；Wherein,
The first input end of the comparison module is connected with the first power supply signal end, the second input and second source signal
End is connected, and the 3rd input is connected with feedback signal terminal, and the first output end is connected with the first input end of the control module, the
Two output ends are connected with the second input of the control module；The comparison module is used for according to the first power supply signal end
With the signal generation threshold voltage of the second source signal end, and by the signal of the feedback signal terminal and the threshold voltage
It is compared, and comparative result is respectively outputted to the first input end and the second input of the control module；
First output end of the control module is connected with the first control terminal of the output module, the second output end and institute
The second control terminal for stating output module is connected, and the 3rd output end is connected with the 3rd control terminal of the output module；The control
Module is used for the control signal according to corresponding to the comparative result generation that the comparison module exports and is respectively outputted to the output
The first control terminal, the second control terminal and the 3rd control terminal of module；
The first input end of the output module is connected with public voltage signal end, the second input and the feedback signal
End is connected, and output end is used to export compensation voltage signal；The output module is used in first control terminal, second control
Under the control of end processed and the 3rd control terminal, according to the public voltage signal end and the signal generation of the feedback signal terminal
Corresponding thermal compensation signal simultaneously exports.
It is described in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention in a kind of possible embodiment
Output module specifically includes：First switch transistor, second switch transistor, the 3rd switching transistor, first resistor, the second electricity
Resistance, 3rd resistor, the 4th resistance, the 5th resistance, the first electric capacity and the first operational amplifier；Wherein,
The grid of the first switch transistor is connected with the first output end of the control module, source electrode respectively with it is described
Public voltage signal end is connected with one end of the first resistor, the positive input phase to drain with first operational amplifier
Even；
The grid of the second switch transistor is connected with the second output end of the control module, source electrode respectively with it is described
The other end of first resistor is connected with one end of the second resistance, drain electrode and the positive input of first operational amplifier
It is connected；
The grid of 3rd switching transistor is connected with the 3rd output end of the control module, source electrode respectively with it is described
The other end of second resistance is connected with one end of the 3rd resistor, drain electrode and the positive input of first operational amplifier
It is connected；
The other end of the 3rd resistor is connected with the second source signal end；
One end of first electric capacity is connected with the feedback signal terminal, one end phase of the other end and the 4th resistance
Even；
The other end of 4th resistance is negative with one end of the 5th resistance and first operational amplifier respectively
It is connected to input；
The other end of 5th resistance is connected with the output end of first operational amplifier.
It is described in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention in a kind of possible embodiment
Control module specifically includes：First NOT gate, the second NOT gate, the 3rd NOT gate, first and door, second and door and the 3rd and door；Wherein,
The input of first NOT gate is connected with the second output end of the comparison module, output end with described first with
The first input end of door is connected；
The input of second NOT gate is connected with the first output end of the comparison module, output end with described first with
Second input of door is connected；
Described first is connected with the output end of door with the grid of the first switch transistor；
The input of 3rd NOT gate is connected with the first output end of the comparison module, output end with described second with
The first input end of door is connected；
Described second is connected with the second input of door with the second output end of the comparison module, output end and described the
The grid of two switching transistors is connected；
Described 3rd is connected with the first input end of door with the first output end of the comparison module, the second input and institute
The second output end for stating comparison module is connected, and output end is connected with the grid of the 3rd switching transistor.
It is described in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention in a kind of possible embodiment
Output module specifically includes：4th switching transistor, the 5th switching transistor, the 6th switching transistor, the 6th resistance, the 7th electricity
Resistance, the 8th resistance, the 9th resistance, the second electric capacity and the second operational amplifier；Wherein,
The grid of 4th switching transistor is connected with the first output end of the control module, source electrode and described second
The negative input of operational amplifier is connected, and drain electrode is connected with one end of the 6th resistance；
The other end of 6th resistance is connected with the output end of second operational amplifier；
The grid of 5th switching transistor is connected with the second output end of the control module, source electrode and described second
The negative input of operational amplifier is connected, and drain electrode is connected with one end of the 7th resistance；
The other end of 7th resistance is connected with the output end of second operational amplifier；
The grid of 6th switching transistor is connected with the 3rd output end of the control module, source electrode and described second
The negative input of operational amplifier is connected, and drain electrode is connected with one end of the 8th resistance；
The other end of 8th resistance is connected with the output end of second operational amplifier；
One end of second electric capacity is connected with the feedback signal terminal, one end phase of the other end and the 9th resistance
Even；
The other end of 9th resistance is connected with the negative input of second operational amplifier；
The normal phase input end of second operational amplifier is connected with the public voltage signal end.
It is described in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention in a kind of possible embodiment
Control module specifically includes：4th NOT gate, the 5th NOT gate, the 6th NOT gate, the 4th and door, the 5th and door and the 6th and door；Wherein,
Described 4th is connected with the first input end of door with the second output end of the comparison module, the second input and institute
The first output end for stating comparison module is connected, and output end is connected with the grid of the 4th switching transistor；
The input of 4th NOT gate is connected with the first output end of the comparison module, output end with the described 5th with
The first input end of door is connected；
Described 5th is connected with the second input of door with the second output end of the comparison module, output end and described the
The grid of five switching transistors is connected；
The input of 5th NOT gate is connected with the first output end of the comparison module, output end with the described 6th with
The first input end of door is connected；
The input of 6th NOT gate is connected with the second output end of the comparison module, output end with the described 6th with
Second input of door is connected；
Described 6th is connected with the output end of door with the grid of the 6th switching transistor.
It is described in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention in a kind of possible embodiment
Comparison module, specifically include：Threshold voltage generation unit and comparing unit；
The first input end of the threshold voltage generation unit is connected with the first power supply signal end, the second input with
The second source signal end is connected, and the first output end is connected with the first input end of the comparing unit, the second output end with
Second input of the comparing unit is connected；The threshold voltage generation unit be used for according to the first power supply signal end and
The signal of the second source signal end, first threshold voltage and second threshold voltage are generated, and be respectively outputted to the comparison
The first input end of unit and the second input；
3rd input of the comparing unit is connected with the feedback signal terminal, the first output end and the control module
First input end be connected, the second output end is connected with the second input of the control module；The comparing unit is used for will
The signal of the feedback signal terminal is respectively compared with the first threshold voltage and the second threshold voltage, and by comparative result
It is respectively outputted to the first input end and the second input of the control module.
It is described in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention in a kind of possible embodiment
Threshold voltage generation unit, is specifically included：Tenth resistance, the 11st resistance and the 12nd resistance；Wherein,
One end of tenth resistance is connected with the second source signal end, the other end respectively with the 11st resistance
One end be connected with the second input of the comparing unit；
The other end of 11 resistance is defeated with the first of one end of the 12nd resistance and the comparing unit respectively
Enter end to be connected；
The other end of 12nd resistance is connected with the first power supply signal end.
It is described in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention in a kind of possible embodiment
Comparing unit, specifically include：3rd electric capacity, first comparator and the second comparator；Wherein,
One end of 3rd electric capacity is connected with the feedback signal terminal, the other end respectively with the first comparator and institute
The normal phase input end for stating the second comparator is connected；
The negative input of the first comparator is connected with the first output end of the threshold voltage production unit, output
End is connected with the first input end of the control module；
The negative input of second comparator is connected with the second output end of the threshold voltage production unit, output
End is connected with the second input of the control module.
The embodiments of the invention provide a kind of compensation side of above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention
Method, including：
According to the first power supply signal end and the signal generation threshold voltage of the second source signal end, and by described in
The signal of feedback signal terminal generates comparative result compared with the threshold voltage；
The control signal according to corresponding to generating comparative result；
Under the control of corresponding control signal, according to the public voltage signal end and the signal of the feedback signal terminal
Thermal compensation signal corresponding to generation simultaneously exports.
In a kind of possible embodiment, in above-mentioned compensation method provided in an embodiment of the present invention, described in the basis
First power supply signal end and the signal generation threshold voltage of the second source signal end, and by the signal of the feedback signal terminal
Compared with the threshold voltage, comparative result is generated, is specifically included：
According to the first power supply signal end and the signal of the second source signal end, first threshold voltage and the are generated
Two threshold voltages；
It is raw by the signal of the feedback signal terminal respectively compared with the first threshold voltage and the second threshold voltage
Into comparative result.
The embodiments of the invention provide a kind of display panel, including above-mentioned common electric voltage compensation provided in an embodiment of the present invention
Circuit.
The beneficial effect of the embodiment of the present invention includes：
The embodiments of the invention provide a kind of common electric voltage compensation circuit, compensation method and display panel, the common electric voltage
Compensation circuit includes：Comparison module, control module and output module；Wherein, comparison module is used for according to the first power supply signal end
With the signal generation threshold voltage of second source signal end, and by the signal of feedback signal terminal compared with threshold voltage, and
Comparative result is respectively outputted to the first input end and the second input of control module；Control module is used for according to comparison module
Control signal corresponding to the comparative result generation of output and be respectively outputted to the first control terminal of output module, the second control terminal and
3rd control terminal；Output module is used under the control of the first control terminal, the second control terminal and the 3rd control terminal, according to common electrical
Thermal compensation signal corresponding to the signal generation of pressure signal end and feedback signal terminal simultaneously exports.Specifically, the signal of feedback signal terminal is anti-
Reflected the fluctuation situation of common electric voltage, thus by comparison module by the signal of feedback signal terminal compared with threshold voltage, it is corresponding
Control signal corresponding to comparative result generation, and then thermal compensation signal and exported according to corresponding to the generation of corresponding control signal, it is real
The compensation of the fluctuation situation for public voltage signal is showed, the peak voltage that can be so fluctuated to public voltage signal is made
Rapidly and effectively compensate.
Brief description of the drawings
Fig. 1 is the structural representation of common electric voltage compensation circuit provided in an embodiment of the present invention；
Fig. 2 and Fig. 3 is respectively the concrete structure schematic diagram of common electric voltage compensation circuit provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawings, to common electric voltage compensation circuit, compensation method and display panel provided in an embodiment of the present invention
Embodiment be described in detail.
The embodiments of the invention provide a kind of common electric voltage compensation circuit, as shown in figure 1, can include：Comparison module 01,
Control module 02 and output module 03；Wherein,
The first input end of comparison module 01 is connected with the first power supply signal end AVDD, and the second input is believed with second source
Number end GND is connected, and the 3rd input is connected with feedback signal terminal FEED, the first input end of the first output end and control module 02
It is connected, the second output end is connected with the second input of control module 02；Comparison module 01 is used for according to the first power supply signal end
AVDD and second source signal end GND signal generation threshold voltage, and by feedback signal terminal FEED signal and threshold voltage
It is compared, and comparative result is respectively outputted to the first input end and the second input of control module 02；
First output end of control module 02 is connected with the first control terminal of output module 03, the second output end and output mould
Second control terminal of block 03 is connected, and the 3rd output end is connected with the 3rd control terminal of output module 03；Control module 02 is used for root
Control signal corresponding to the comparative result generation exported according to comparison module 01 is simultaneously respectively outputted to the first control of output module 03
End, the second control terminal and the 3rd control terminal；
The first input end of output module 03 is connected with public voltage signal end VCOM, the second input and feedback signal terminal
FEED is connected, and output end OUTPUT is used to export compensation voltage signal；Output module 03 is used in the first control terminal, the second control
Under the control of end and the 3rd control terminal, according to corresponding to public voltage signal end VCOM and feedback signal terminal FEED signal generation
Thermal compensation signal simultaneously exports.
In above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, the signal of feedback signal terminal reflects common electrical
The fluctuation situation of pressure, thus by comparison module by the signal of feedback signal terminal compared with threshold voltage, corresponding comparative result life
Into corresponding control signal, and then thermal compensation signal and exported, realized for public affairs according to corresponding to the generation of corresponding control signal
The compensation of the fluctuation situation of common voltage signal, the peak voltage that can be so fluctuated to public voltage signal are made quickly and efficiently
Compensation.
In the specific implementation, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, as shown in Fig. 2 output
Module 03 specifically includes：First switch transistor T1, second switch transistor T2, the 3rd switching transistor T3, first resistor R1,
Second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first electric capacity C1 and the first operational amplifier Y1；Its
In, first switch transistor T1 grid is connected with the first output end of control module 02, source electrode respectively with public voltage signal
End VCOM is connected with first resistor R1 one end, and drain electrode is connected with the first operational amplifier Y1 positive input；Second switch
Transistor T2 grid is connected with the second output end of control module 02, source electrode respectively with the first resistor R1 other end and second
Resistance R2 one end is connected, and drain electrode is connected with the first operational amplifier Y1 positive input；3rd switching transistor T3 grid
Pole is connected with the 3rd output end of control module 02, source electrode respectively with the second resistance R2 other end and 3rd resistor R3 one end
It is connected, drain electrode is connected with the first operational amplifier Y1 positive input；The 3rd resistor R3 other end and second source signal
End GND is connected；First electric capacity C1 one end is connected with feedback signal terminal FEED, and the other end is connected with the 4th resistance R4 one end；
The 4th resistance R4 other end is connected with the 5th resistance R5 one end and the first operational amplifier Y1 negative input respectively；The
The five resistance R5 other end is connected with the first operational amplifier Y1 output end OUTPUT1.
Specifically, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, first switch transistor can be
Turned under the control of first output end of control module, the first switch transistor of conducting is by the signal at public voltage signal end
Vcom is output to the normal phase input end of the first operational amplifier, and then the signal of the first operational amplifier output terminal output isWherein VFEEDFor the signal of feedback signal terminal；Second switch transistor can be the of control module
Turned under the control of two output ends, the second switch transistor of conducting divides one end of the other end of first resistor and second resistance
Normal phase input end not with the first operational amplifier turns on, and then the signal of the first operational amplifier output terminal output is3rd switching transistor can be in the control of the 3rd output end of control module
System is lower to be turned on, the 3rd switching transistor of conducting by one end of the other end of second resistance and 3rd resistor respectively with the first computing
The normal phase input end conducting of amplifier, and then the signal of the first operational amplifier output terminal output isThe different control signals so exported according to control module, control first switch crystal
The unlatching of pipe, second switch transistor and the 3rd switching transistor, so as to change the letter of the first operational amplifier positive input
Number, and then change the DC component of the first operational amplifier output, can so it not influence the response frequency of feedback circuit
Under the premise of, realize the quick compensation to public voltage signal fluctuation.
In the specific implementation, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, as shown in Fig. 2 control
Module 02 specifically includes：First NOT gate F1, the second NOT gate F2, the 3rd NOT gate F3, first and door U1, second with door U2 and the 3rd with
Door U3；Wherein, the first NOT gate F1 input is connected with the second output end of comparison module 01, and output end is with first with door U1's
First input end is connected；Second NOT gate F2 input is connected with the first output end of comparison module 01, output end with first with
Door U1 the second input is connected；First is connected with door U1 output end with first switch transistor T1 grid；3rd NOT gate
F3 input is connected with the first output end of comparison module 01, and output end is connected with second with door U2 first input end；The
Two are connected with door U2 the second input with the second output end of comparison module 01, output end and second switch transistor T2 grid
Extremely it is connected；3rd is connected with door U3 first input end with the first output end of comparison module 01, the second input mould compared with
Second output end of block 01 is connected, and output end is connected with the 3rd switching transistor T3 grid.
Specifically, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, the comparison knot of comparison module generation
Fruit is respectively outputted to the first NOT gate of control module, the second NOT gate, the 3rd NOT gate by the first output end and the second output end
Input, and the first input end and the second input of second and the second input of door and the 3rd and door, so by control
First NOT gate in molding block, the second NOT gate, the 3rd NOT gate, first with door, second with door and the 3rd with the logical operation of door, generation
Corresponding control signal and the grid for being respectively outputted to first switch transistor, second switch transistor and the 3rd switching transistor,
So as to control first switch transistor, second switch transistor and the 3rd to open the on or off of switching transistor, and then cause
Output module can correspond to and export different thermal compensation signals, realize the compensation for public voltage signal fluctuation situation, so may be used
Rapidly and effectively compensated with being made to the peak voltage that public voltage signal fluctuates.
In the specific implementation, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, as shown in figure 3, output
Module 03 can specifically include：4th switching transistor T4, the 5th switching transistor T5, the 6th switching transistor T6, the 6th electricity
Hinder R6, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, the second electric capacity C2 and the second operational amplifier Y2；Wherein, the 4th
Switching transistor T4 grid is connected with the first output end of control module 02, and the negative sense of source electrode and the second operational amplifier Y2 is defeated
Enter end to be connected, drain electrode is connected with the 6th resistance R6 one end；The 6th resistance R6 other end is defeated with the second operational amplifier Y2's
Go out to hold OUTPUT2 to be connected；5th switching transistor T5 grid is connected with the second output end of control module 02, source electrode and second
Operational amplifier Y2 negative input is connected, and drain electrode is connected with the 7th resistance R7 one end；The 7th resistance R7 other end with
Second operational amplifier Y2 output end OUTPUT2 is connected；6th switching transistor T6 grid and the 3rd of control module 02 the
Output end is connected, and source electrode is connected with the second operational amplifier Y2 negative input, and drain electrode is connected with the 8th resistance R8 one end；
The 8th resistance R8 other end is connected with the second operational amplifier Y2 output end OUTPUT2；Second electric capacity C2 one end with it is anti-
Feedback signal end FEED is connected, and the other end is connected with the 9th resistance R9 one end；The 9th resistance R9 other end is put with the second computing
Big device Y2 negative input is connected；Second operational amplifier Y2 normal phase input end is connected with public voltage signal end VCOM.
Specifically, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, the 4th switching transistor can be
Turned under the control of first output end of control module, the 4th switching transistor of conducting is by the negative sense of the second operational amplifier
Input turns on one end of the 6th resistance, and then the signal of the second operational amplifier output terminal output isWherein VFEEDFor the signal of feedback signal terminal；5th switching transistor can be the of control module
Turned under the control of two output ends, the 5th switching transistor of conducting is electric by the negative input of the second operational amplifier and the 7th
One end conducting of resistance, and then the signal of the second operational amplifier output terminal output is6th switch is brilliant
Body pipe can turn under the control of the 3rd output end of control module, and the 6th switching transistor of conducting is by the second operation amplifier
The negative input of device turns on one end of the 8th resistance, and then the signal of the second operational amplifier output terminal output isThe different control signals so exported according to control module, the 4th switching transistor of control, the 5th open
The unlatching of transistor and the 6th switching transistor is closed, so as to change the multiplication factor of the second operational amplifier, and then changes second
The thermal compensation signal of operational amplifier output, it can so realize and quick benefit is made to the peak voltage of public voltage signal fluctuation
Repay.
In the specific implementation, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, as shown in figure 3, control
Module 02 can specifically include：4th NOT gate F4, the 5th NOT gate F5, the 6th NOT gate F6, the 4th and door U4, the 5th with door U5 and the
Six and door U6；Wherein, the 4th is connected with door U4 first input end with the second output end of comparison module 01, the second input with
First output end of comparison module 01 is connected, and output end is connected with the 4th switching transistor T4 grid；4th NOT gate F4's is defeated
Enter end with the first output end of comparison module 01 to be connected, output end is connected with the 5th with door U5 first input end；5th and door
U5 the second input is connected with the second output end of comparison module 01, output end and the 5th switching transistor T5 grid phase
Even；5th NOT gate F5 input is connected with the first output end of comparison module 01, and output end is defeated with the first of door U6 with the 6th
Enter end to be connected；6th NOT gate U6 input is connected with the second output end of comparison module 01, and output end is with the 6th with door U6's
Second input is connected；6th is connected with door U6 output end with the 6th switching transistor T6 grid.
Specifically, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, the comparison knot of comparison module generation
Fruit is respectively outputted to the 4th NOT gate of control module, the 5th NOT gate, the 6th NOT gate by the first output end and the second output end
Input, and the 4th with the first input end of door and the second input, the 5th with the second input of door, so by controlling
4th NOT gate in module, the 5th NOT gate, the 6th NOT gate, the 4th with door, the 5th with door and the 6th with the logical operation of door, generation pair
Answer control signal and be respectively outputted to the grid of the 4th switching transistor, the 5th switching transistor and the 6th switching transistor, from
And control the 4th switching transistor, the 5th switching transistor and the 6th to open the on or off of switching transistor, and then cause defeated
Go out module and can correspond to export different thermal compensation signals, realize the compensation for public voltage signal fluctuation situation, so can be with
The peak voltage fluctuated to public voltage signal, which is made, rapidly and effectively to be compensated.
In the specific implementation, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, as shown in Figures 2 and 3,
Comparison module 01 can specifically include：Threshold voltage generation unit 011 and comparing unit 012；Threshold voltage generation unit 011
First input end is connected with the first power supply signal end AVDD, and the second input is connected with second source signal end GND, the first output
End is connected with the first input end of comparing unit 012, and the second output end is connected with the second input of comparing unit 012；Threshold value
Voltage generating unit 011 is used for the signal according to the first power supply signal end AVDD and second source signal end GND, generates the first threshold
Threshold voltage and second threshold voltage, and it is respectively outputted to the first input end and the second input of comparing unit 012；Comparing unit
012 the 3rd input is connected with feedback signal terminal FEED, and the first output end is connected with the first input end of control module 02, the
Two output ends are connected with the second input of control module 02；Comparing unit 012 is used for feedback signal terminal FEED signal point
Not compared with first threshold voltage and second threshold voltage, and comparative result is respectively outputted to the first of control module 02 and inputted
End and the second input.
Specifically, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, comparison module can specifically include
Threshold voltage generation unit and comparing unit, threshold voltage generation unit is according to the first power supply signal end and second source signal end
Signal, generate first threshold voltage and second threshold voltage, so comparing unit by the signal of feedback signal terminal respectively with the
One threshold voltage and second threshold voltage compare, and comparative result is respectively outputted to the first input end and second of control module
Input, so as to control module control signal according to corresponding to generating comparative result, corresponding control signal controls output module
Thermal compensation signal corresponding to output, so as to realize the compensation for public voltage signal fluctuation situation.
In the specific implementation, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, as shown in Figures 2 and 3,
Threshold voltage generation unit 011 can specifically include：Tenth resistance R10, the 11st resistance R11 and the 12nd resistance R12；Its
In, the tenth resistance R10 one end is connected with second source signal end GND, the other end respectively with the 11st resistance R11 one end and
Second input of comparing unit 012 is connected；The 11 resistance R11 other end one end with the 12nd resistance R12 and ratio respectively
First input end compared with unit 012 is connected；The 12nd resistance R12 other end is connected with the first power supply signal end AVDD.Specifically
Ground, by setting the tenth resistance R10, the 11st resistance R11 and the 12nd resistance R12 resistance value, thus it is possible to vary each resistance
Partial pressure, so as to change the size for the threshold voltage for being input to comparing unit first input end and the second input, setting is input to
The threshold voltage of the first input end of comparing unit is first threshold voltage V1, the first threshold voltage isThe threshold voltage for the second input for being input to comparing unit is set as the second threshold
Threshold voltage V2, the second threshold voltage isThreshold voltage generation unit passes through the tenth resistance,
The partial pressure of 11 resistance and the 12nd resistance acts on, and generates first threshold voltage and second threshold voltage and is respectively outputted to compare
Compared with the first input end and the second input of unit.
In the specific implementation, in above-mentioned common electric voltage compensation circuit provided in an embodiment of the present invention, as shown in Figures 2 and 3,
Comparing unit can specifically include：3rd electric capacity C3, first comparator B1 and the second comparator B2；Wherein, the 3rd electric capacity C3
One end is connected with feedback signal terminal FEED, the other end normal phase input end phase with first comparator B1 and the second comparator B2 respectively
Even；First comparator B1 negative input is connected with the first output end of threshold voltage production unit 011, output end and control
The first input end of module 02 is connected；Second comparator B2 negative input and the second of threshold voltage production unit 011 defeated
Go out end to be connected, output end is connected with the second input of control module 02.Specifically, threshold voltage generation unit is by the of generation
One threshold voltage isIt is with second threshold voltagePoint
The negative input of first comparator and the negative input of the second comparator, and then first comparator and the second ratio are not input to
Compared with device by the signal V of feedback signal terminalFEEDRespectively with first threshold voltage V1With second threshold voltage V2It is compared, will compares
As a result the first input end and the second input of control module are respectively outputted to.
Wherein work as VFEED≤V2When, first comparator and the second comparator export the first logic level signal and (such as patrolled respectively
Volume low level signal 0) arrive the first input end and the second input of control module, by each NOT gate in control module and with door
Logical operation, first, second, third control terminal of control signal corresponding to final output to output module；Work as V2<VFEED<V1
When, first comparator exports the first logic level signal and patrolled to the first input end of control module, the second comparator output second
Volume level signal (such as logic-high signal 1) arrives the second input of control module, by each NOT gate in control module and
With the logical operation of door, first, second, third control terminal of control signal corresponding to final output to output module；Work as V1≤
VFEEDWhen, first comparator and the second comparator export respectively the second logic level signal to the first input end of control module and
Second input, by each NOT gate in control module and the logical operation with door, control signal corresponding to final output to output
First, second, third control terminal of module.
The course of work of the specific common electric voltage compensation circuit shown in Fig. 2 and Fig. 3 is described separately below：
First threshold voltage and second threshold voltage are respectively V1And V2：Wherein,
The first logic level signal is set as 0, the second logic level signal is 1, is compared by first comparator and second
Device is by the signal V of feedback signal terminalFEEDWith V1、V2It is compared, comparative result is the logic level that NAND gate can recognize that, and non-
The result that the logic circuit of door composition exports to comparator carries out logical operation, with the on or off of controlling switch transistor；
In circuit shown in Fig. 2, work as VFEED≤V2When, first comparator B1 and the second comparator B2 export 0 to the first respectively
NOT gate F1, the second NOT gate F2, the 3rd NOT gate F3 input, and second and door U2 the second input and the 3rd is with door U3's
First input end and the second input, first is caused to open by each NOT gate and with the control signal of the logical operation final output of door
Transistor T1 conductings, second switch transistor T2 and the 3rd switching transistor T3 is closed to close, therefore the first switch crystal turned on
The signal Vcom at public voltage signal end is output to the first operational amplifier Y1 normal phase input end, and then the first computing by pipe T1
Amplifier Y1 output end OUTPUT1 output signal be
Work as V2<VFEED<V1When, first comparator B1 exports the 0 to the second NOT gate F2, the 3rd NOT gate F3 input, Yi Ji
Three and door U3 first input end, the second comparator B2 export the 1 to the first NOT gate F1 input and the 3rd and the second of door U3
Input, by each NOT gate and with the control signal of the logical operation final output of door second switch transistor T2 is turned on,
First switch transistor T1 and the 3rd switching transistor T3 are closed, therefore the second switch transistor T2 turned on is by first resistor R1
The other end and second resistance R2 normal phase input end of the one end respectively with the first operational amplifier Y1 turn on, and then the first computing
Amplifier Y1 output end OUTPUT1 output signal be：
Work as V1≤VFEEDWhen, first comparator B1 and the second comparator B2 export the 1 to the first NOT gate F1, the second NOT gate respectively
F2, the 3rd NOT gate F3 input, and second with door U2 the second input and the 3rd with door U3 first input end and the
Two inputs, by each NOT gate and with the control signal of the logical operation final output of door the 3rd switching transistor T3 is led
Logical, first switch transistor T1 and second switch transistor T2 is closed, and the 3rd switching transistor of conducting is by second resistance R2's
Normal phase input end of the other end and 3rd resistor the R3 one end respectively with the first operational amplifier Y1 is turned on, and then the first computing is put
The signal of big device Y1 output end OUTPUT1 outputs isThe circuit does not influence feedback electricity
The response frequency on road, the achievable peak voltage to public voltage signal fluctuation, which is made, fast and effectively to be compensated.
In circuit shown in Fig. 3, work as VFEED≤V2When, first comparator B1 and the second comparator B2 export 0 to the 4th respectively
NOT gate F4, the 5th NOT gate F5, the 6th NOT gate F6 input, and the 4th with door U4 first input end and the second input,
5th and door U5 the second input, causes the 6th to open by each NOT gate and with the control signal of the logical operation final output of door
Transistor T6 conductings, the 4th switching transistor T4 and the 5th switching transistor T5 is closed to close, therefore the 6th switch crystal turned on
Pipe T6 turns on the second operational amplifier Y2 negative input with the 8th resistance R8 one end, and then the second operational amplifier
Y2 output end OUTPUT2 output signal be
Work as V2<VFEED<V1When, first comparator B1 exports 0 to the 4th the second input with door U4, and the 4th NOT gate
F4 and the 5th NOT gate F5 input, the second comparator B2 export 1 to the 4th and door U4 first input end, the 5th with door U5's
The input of second input and the 6th and door F6, makes by each NOT gate and with the control signal of the logical operation final output of door
The 5th switching transistor T5 conductings, the 4th switching transistor T4 and the 6th switching transistor T6 is obtained to close, therefore the 5th turned on
Switching transistor T5 turns on the second operational amplifier Y2 negative input with the 7th resistance R7 one end, and then the second computing
Amplifier Y2 output end OUTPUT2 output signal be
Work as V1≤VFEEDWhen, first comparator B1 and the second comparator B2 export the 1 to the 4th NOT gate F4, the 5th NOT gate respectively
F5, the 6th NOT gate F6 input, and the 4th and door U4 first input end and the second input, the 5th and the second of door U5
Input, by each NOT gate and with the control signal of the logical operation final output of door the 4th switching transistor T4 is turned on,
5th switching transistor T5 and the 6th switching transistor T6 are closed, and the 4th switching transistor T4 of conducting is by the second operational amplifier
Y2 negative input turns on the 6th resistance R6 one end, and then the second operational amplifier Y2 output end OUTPUT2 is defeated
The signal gone out isThe circuit is realized according to the fluctuation situation of public voltage signal and uses different compensation
The mode of multiple realizes the compensation to public voltage signal fluctuation, can so realize the spike electricity to public voltage signal fluctuation
Pressure, which is made, fast and effectively to be compensated.
It should be noted that the switching transistor mentioned in the above embodiment of the present invention can be thin film transistor (TFT) (TFT,
Thin Film Transistor) or metal oxide semiconductor field effect tube (MOS, Metal Oxide
Semiconductor), do not limit herein.In specific implementation, the source electrode of these transistors and drain electrode can exchange, and not do
It is specific to distinguish.Illustrated when describing specific embodiment by taking thin film transistor (TFT) as an example.
Based on same inventive concept, the embodiments of the invention provide a kind of above-mentioned common electric voltage provided in an embodiment of the present invention
The compensation method of compensation circuit, following steps can be specifically included：
According to the first power supply signal end and the signal generation threshold voltage of second source signal end, and by feedback signal terminal
Signal generates comparative result compared with threshold voltage；
The control signal according to corresponding to generating comparative result；
It is corresponding according to the signal generation of public voltage signal end and feedback signal terminal under the control of corresponding control signal
Thermal compensation signal and output.
Specifically, in above-mentioned compensation method provided in an embodiment of the present invention, reflected by the signal of feedback signal terminal public
The fluctuation situation of voltage, and then by comparing the signal and threshold voltage of feedback signal terminal, correspond to corresponding to comparative result generation
Control signal, and then thermal compensation signal and exported according to corresponding to the generation of corresponding control signal, realize and believe for common electric voltage
Number fluctuation situation compensation, the peak voltage that can be so fluctuated to public voltage signal make and rapidly and effectively compensating.
In the specific implementation, in above-mentioned compensation method provided in an embodiment of the present invention, according to the first power supply signal end and
The signal generation threshold voltage at two power supply signal ends, and by the signal of feedback signal terminal compared with threshold voltage, generate ratio
Relatively result, it can specifically include：According to the first power supply signal end and the signal of second source signal end, first threshold voltage is generated
And second threshold voltage；By the signal of feedback signal terminal respectively compared with first threshold voltage and second threshold voltage, ratio is generated
Relatively result.Specifically, by the way that the signal of feedback signal terminal compared with first threshold voltage and second threshold voltage, is corresponded to
Generation comparative result simultaneously exports, so as to realize that being directed to public voltage signal fluctuation situation compensates.
Based on same inventive concept, the embodiments of the invention provide a kind of display panel, including the embodiment of the present invention to provide
Above-mentioned common electric voltage compensation circuit.It is similar to common electric voltage compensation circuit to solve the principle of problem due to the display panel, because
The specific implementation of this display panel may refer to the embodiment of above-mentioned common electric voltage compensation circuit, repeats part and repeats no more.
The embodiments of the invention provide a kind of common electric voltage compensation circuit, compensation method and display panel, the common electric voltage
Compensation circuit includes：Comparison module, control module and output module；Wherein, comparison module is used for according to the first power supply signal end
With the signal generation threshold voltage of second source signal end, and by the signal of feedback signal terminal compared with threshold voltage, and
Comparative result is respectively outputted to the first input end and the second input of control module；Control module is used for according to comparison module
Control signal corresponding to the comparative result generation of output and be respectively outputted to the first control terminal of output module, the second control terminal and
3rd control terminal；Output module is used under the control of the first control terminal, the second control terminal and the 3rd control terminal, according to common electrical
Thermal compensation signal corresponding to the signal generation of pressure signal end and feedback signal terminal simultaneously exports.Specifically, the signal of feedback signal terminal is anti-
Reflected the fluctuation situation of common electric voltage, thus by comparison module by the signal of feedback signal terminal compared with threshold voltage, it is corresponding
Control signal corresponding to comparative result generation, and then thermal compensation signal and exported according to corresponding to the generation of corresponding control signal, it is real
The compensation of the fluctuation situation for public voltage signal is showed, the peak voltage that can be so fluctuated to public voltage signal is made
Rapidly and effectively compensate.
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 (11)
- A kind of 1. common electric voltage compensation circuit, it is characterised in that including：Comparison module, control module and output module；Wherein,The first input end of the comparison module is connected with the first power supply signal end, the second input and second source signal end phase Even, the 3rd input is connected with feedback signal terminal, and the first output end is connected with the first input end of the control module, and second is defeated Go out end with the second input of the control module to be connected；The comparison module is used for according to the first power supply signal end and institute The signal generation threshold voltage of second source signal end is stated, and the signal of the feedback signal terminal and the threshold voltage are carried out Compare, and comparative result is respectively outputted to the first input end and the second input of the control module；First output end of the control module is connected with the first control terminal of the output module, the second output end with it is described defeated The second control terminal for going out module is connected, and the 3rd output end is connected with the 3rd control terminal of the output module；The control module For control signal and being respectively outputted to the output module corresponding to the comparative result generation that is exported according to the comparison module The first control terminal, the second control terminal and the 3rd control terminal；The first input end of the output module is connected with public voltage signal end, the second input and the feedback signal terminal phase Even, output end is used to export compensation voltage signal；The output module is used in first control terminal, second control terminal It is corresponding according to the signal generation of the public voltage signal end and the feedback signal terminal under control with the 3rd control terminal Thermal compensation signal and output.
- 2. common electric voltage compensation circuit as claimed in claim 1, it is characterised in that the output module specifically includes：First Switching transistor, second switch transistor, the 3rd switching transistor, first resistor, second resistance, 3rd resistor, the 4th resistance, 5th resistance, the first electric capacity and the first operational amplifier；Wherein,The grid of the first switch transistor is connected with the first output end of the control module, source electrode respectively with it is described public Voltage signal end is connected with one end of the first resistor, and drain electrode is connected with the positive input of first operational amplifier；The grid of the second switch transistor is connected with the second output end of the control module, and source electrode is respectively with described first The other end of resistance is connected with one end of the second resistance, the positive input phase to drain with first operational amplifier Even；The grid of 3rd switching transistor is connected with the 3rd output end of the control module, and source electrode is respectively with described second The other end of resistance is connected with one end of the 3rd resistor, the positive input phase to drain with first operational amplifier Even；The other end of the 3rd resistor is connected with the second source signal end；One end of first electric capacity is connected with the feedback signal terminal, and the other end is connected with one end of the 4th resistance；The other end of 4th resistance is defeated with one end of the 5th resistance and the negative sense of first operational amplifier respectively Enter end to be connected；The other end of 5th resistance is connected with the output end of first operational amplifier.
- 3. common electric voltage compensation circuit as claimed in claim 2, it is characterised in that the control module specifically includes：First NOT gate, the second NOT gate, the 3rd NOT gate, first and door, second and door and the 3rd and door；Wherein,The input of first NOT gate is connected with the second output end of the comparison module, output end and described first and door First input end is connected；The input of second NOT gate is connected with the first output end of the comparison module, output end and described first and door Second input is connected；Described first is connected with the output end of door with the grid of the first switch transistor；The input of 3rd NOT gate is connected with the first output end of the comparison module, output end and described second and door First input end is connected；Described second is connected with the second input of door with the second output end of the comparison module, and output end is opened with described second The grid for closing transistor is connected；Described 3rd is connected with the first input end of door with the first output end of the comparison module, the second input and the ratio The second output end compared with module is connected, and output end is connected with the grid of the 3rd switching transistor.
- 4. common electric voltage compensation circuit as claimed in claim 1, it is characterised in that the output module specifically includes：4th Switching transistor, the 5th switching transistor, the 6th switching transistor, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, Second electric capacity and the second operational amplifier；Wherein,The grid of 4th switching transistor is connected with the first output end of the control module, source electrode and second computing The negative input of amplifier is connected, and drain electrode is connected with one end of the 6th resistance；The other end of 6th resistance is connected with the output end of second operational amplifier；The grid of 5th switching transistor is connected with the second output end of the control module, source electrode and second computing The negative input of amplifier is connected, and drain electrode is connected with one end of the 7th resistance；The other end of 7th resistance is connected with the output end of second operational amplifier；The grid of 6th switching transistor is connected with the 3rd output end of the control module, source electrode and second computing The negative input of amplifier is connected, and drain electrode is connected with one end of the 8th resistance；The other end of 8th resistance is connected with the output end of second operational amplifier；One end of second electric capacity is connected with the feedback signal terminal, and the other end is connected with one end of the 9th resistance；The other end of 9th resistance is connected with the negative input of second operational amplifier；The normal phase input end of second operational amplifier is connected with the public voltage signal end.
- 5. common electric voltage compensation circuit as claimed in claim 4, it is characterised in that the control module specifically includes：4th NOT gate, the 5th NOT gate, the 6th NOT gate, the 4th and door, the 5th and door and the 6th and door；Wherein,Described 4th is connected with the first input end of door with the second output end of the comparison module, the second input and the ratio The first output end compared with module is connected, and output end is connected with the grid of the 4th switching transistor；The input of 4th NOT gate is connected with the first output end of the comparison module, output end and the described 5th and door First input end is connected；Described 5th is connected with the second input of door with the second output end of the comparison module, and output end is opened with the described 5th The grid for closing transistor is connected；The input of 5th NOT gate is connected with the first output end of the comparison module, output end and the described 6th and door First input end is connected；The input of 6th NOT gate is connected with the second output end of the comparison module, output end and the described 6th and door Second input is connected；Described 6th is connected with the output end of door with the grid of the 6th switching transistor.
- 6. the common electric voltage compensation circuit as described in claim any one of 1-5, it is characterised in that the comparison module, specifically Including：Threshold voltage generation unit and comparing unit；The first input end of the threshold voltage generation unit is connected with the first power supply signal end, the second input with it is described Second source signal end is connected, and the first output end is connected with the first input end of the comparing unit, the second output end with it is described Second input of comparing unit is connected；The threshold voltage generation unit is used for according to the first power supply signal end and described The signal of second source signal end, first threshold voltage and second threshold voltage are generated, and be respectively outputted to the comparing unit First input end and the second input；3rd input of the comparing unit is connected with the feedback signal terminal, and the of the first output end and the control module One input is connected, and the second output end is connected with the second input of the control module；The comparing unit is used for by described in The signal of feedback signal terminal is respectively compared with the first threshold voltage and the second threshold voltage, and comparative result is distinguished It is output to the first input end and the second input of the control module.
- 7. common electric voltage compensation circuit as claimed in claim 6, it is characterised in that the threshold voltage generation unit, specifically Including：Tenth resistance, the 11st resistance and the 12nd resistance；Wherein,One end of tenth resistance is connected with the second source signal end, the other end respectively with the 11st resistance one End is connected with the second input of the comparing unit；The other end of 11 resistance respectively with one end of the 12nd resistance and the first input end of the comparing unit It is connected；The other end of 12nd resistance is connected with the first power supply signal end.
- 8. common electric voltage compensation circuit as claimed in claim 6, it is characterised in that the comparing unit, specifically include：3rd Electric capacity, first comparator and the second comparator；Wherein,One end of 3rd electric capacity is connected with the feedback signal terminal, the other end respectively with the first comparator and described The normal phase input end of two comparators is connected；The negative input of the first comparator is connected with the first output end of the threshold voltage production unit, output end with The first input end of the control module is connected；The negative input of second comparator is connected with the second output end of the threshold voltage production unit, output end with Second input of the control module is connected.
- A kind of 9. compensation method of common electric voltage compensation circuit as described in claim any one of 1-8, it is characterised in that bag Include：According to the first power supply signal end and the signal generation threshold voltage of the second source signal end, and by the feedback The signal of signal end generates comparative result compared with the threshold voltage；The control signal according to corresponding to generating comparative result；Under the control of corresponding control signal, according to the public voltage signal end and the signal generation of the feedback signal terminal Corresponding thermal compensation signal simultaneously exports.
- 10. compensation method as claimed in claim 9, it is characterised in that described according to the first power supply signal end and described The signal generation threshold voltage of second source signal end, and the signal of the feedback signal terminal and the threshold voltage are compared Compared with, generate comparative result, specifically include：According to the first power supply signal end and the signal of the second source signal end, first threshold voltage and the second threshold are generated Threshold voltage；By the signal of the feedback signal terminal respectively compared with the first threshold voltage and the second threshold voltage, ratio is generated Relatively result.
- 11. a kind of display panel, it is characterised in that including the common electric voltage compensation circuit as described in claim any one of 1-8.
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| CN106328035A (en) * | 2016-08-23 | 2017-01-11 | 京东方科技集团股份有限公司 | Common voltage compensating circuit, common voltage compensating method, display panel and display device |
| CN107578752B (en) * | 2017-09-20 | 2019-07-05 | 京东方科技集团股份有限公司 | Common voltage calibrates circuit, circuit board and display device |
| CN108198531B (en) | 2018-01-09 | 2021-02-09 | 京东方科技集团股份有限公司 | Common voltage generation circuit, common voltage generation method and display device |
| CN107993628B (en) * | 2018-01-26 | 2020-05-12 | 京东方科技集团股份有限公司 | Common voltage compensation circuit, compensation method thereof, display panel and display device |
| CN108847173B (en) * | 2018-06-29 | 2020-09-29 | 深圳市华星光电半导体显示技术有限公司 | Common voltage feedback compensation circuit and method and flat panel display device |
| CN109545123A (en) * | 2019-01-07 | 2019-03-29 | 合肥京东方显示技术有限公司 | Voltage compensating circuit, its voltage compensating method, drive system and display device |
| CN111610673B (en) * | 2020-06-22 | 2023-05-09 | 京东方科技集团股份有限公司 | Display panel, display device and control method of display panel |
| CN112885307B (en) * | 2021-01-18 | 2022-07-12 | 深圳市华星光电半导体显示技术有限公司 | Display panel, voltage adjusting method of display panel and display device |
| CN116312406A (en) * | 2023-01-31 | 2023-06-23 | 惠科股份有限公司 | Common voltage compensation circuit and display device |
| CN116994536B (en) * | 2023-08-31 | 2023-12-01 | 惠科股份有限公司 | Common voltage compensation circuit, compensation method and display device |
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