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
- Publication number
- 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
- Authority
- CN
- China
- Prior art keywords
- gate
- output
- resistor
- signal
- input end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 24
- 230000000052 comparative effect Effects 0.000 abstract 3
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electronic Switches (AREA)
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 invention relates to the technical field of display, in particular to a common voltage compensation circuit, a compensation method and a display panel.
Background
In the conventional display device, when different images are displayed, the fluctuation range of the common voltage signal in the display panel is different, the influence of the pixel voltage on the common voltage is increased along with the increase of the capacitance of the transistor in the display panel, and if the fluctuation of the common voltage cannot be effectively counteracted, the display image of the display panel has a bad phenomenon such as green light.
In the prior art, a common voltage compensation circuit with a fixed feedback multiple is generally adopted to compensate common voltage so as to eliminate fluctuation of the common voltage, however, the common voltage compensation circuit with the fixed feedback multiple cannot quickly and effectively compensate peak voltage of the fluctuation of the common voltage, so that the quality of a display picture of a display panel is influenced, and the visual effect of the display picture is reduced.
Therefore, how to quickly and effectively compensate for the peak voltage of the common voltage fluctuation is an urgent technical problem to be solved by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a common voltage compensation circuit, a compensation method and a display panel, which are used for solving the problem that the common voltage compensation circuit with fixed feedback multiple in the prior art cannot quickly and effectively compensate peak voltage of common voltage fluctuation.
The embodiment of the invention provides a public voltage compensation circuit, which comprises: the device comprises a comparison module, a control module and an output module; wherein,
the first input end of the comparison module is connected with the first power supply signal end, the second input end of the comparison module is connected with the second power supply signal end, the third input end of the comparison module is connected with the feedback signal end, the first output end of the comparison module is connected with the first input end of the control module, and the second output end of the comparison module is connected with the second input end of the control module; the comparison module is used for generating a threshold voltage according to the signals of the first power supply signal end and the second power supply signal end, comparing the signal of the feedback signal end with the threshold voltage, and respectively outputting the comparison result to a first input end and a second input end of the control module;
the first output end of the control module is connected with the first control end of the output module, the second output end of the control module is connected with the second control end of the output module, and the third output end of the control module is connected with the third control end of the output module; the control module is used for generating corresponding control signals according to the comparison result output by the comparison module and outputting the control signals to the first control end, the second control end and the third control end of the output module respectively;
the first input end of the output module is connected with a common voltage signal end, the second input end of the output module is connected with the feedback signal end, and the output end of the output module is used for outputting a compensation voltage signal; the output module is used for generating and outputting corresponding compensation signals according to the signals of the common voltage signal end and the feedback signal end under the control of the first control end, the second control end and the third control end.
In a possible implementation manner, in the above-mentioned common voltage compensation circuit provided in an embodiment of the present invention, the output module specifically includes: the circuit comprises a first switching transistor, a second switching transistor, a third switching transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor and a first operational amplifier; wherein,
the grid electrode of the first switching transistor is connected with the first output end of the control module, the source electrode of the first switching transistor is respectively connected with the common voltage signal end and one end of the first resistor, and the drain electrode of the first switching transistor is connected with the positive input end of the first operational amplifier;
the grid electrode of the second switching transistor is connected with the second output end of the control module, the source electrode of the second switching transistor is respectively connected with the other end of the first resistor and one end of the second resistor, and the drain electrode of the second switching transistor is connected with the positive input end of the first operational amplifier;
the grid electrode of the third switching transistor is connected with the third output end of the control module, the source electrode of the third switching transistor is respectively connected with the other end of the second resistor and one end of the third resistor, and the drain electrode of the third switching transistor is connected with the positive input end of the first operational amplifier;
the other end of the third resistor is connected with the second power supply signal end;
one end of the first capacitor is connected with the feedback signal end, and the other end of the first capacitor is connected with one end of the fourth resistor;
the other end of the fourth resistor is connected with one end of the fifth resistor and the negative input end of the first operational amplifier respectively;
the other end of the fifth resistor is connected with the output end of the first operational amplifier.
In a possible implementation manner, in the above-mentioned common voltage compensation circuit provided in an embodiment of the present invention, the control module specifically includes: the first NOT gate, the second NOT gate, the third NOT gate, the first AND gate, the second AND gate and the third AND gate; wherein,
the input end of the first NOT gate is connected with the second output end of the comparison module, and the output end of the first NOT gate is connected with the first input end of the first AND gate;
the input end of the second NOT gate is connected with the first output end of the comparison module, and the output end of the second NOT gate is connected with the second input end of the first AND gate;
the output end of the first AND gate is connected with the grid of the first switch transistor;
the input end of the third NOT gate is connected with the first output end of the comparison module, and the output end of the third NOT gate is connected with the first input end of the second AND gate;
a second input end of the second AND gate is connected with a second output end of the comparison module, and an output end of the second AND gate is connected with a grid electrode of the second switching transistor;
and a first input end of the third AND gate is connected with a first output end of the comparison module, a second input end of the third AND gate is connected with a second output end of the comparison module, and an output end of the third AND gate is connected with a grid electrode of the third switching transistor.
In a possible implementation manner, in the above-mentioned common voltage compensation circuit provided in an embodiment of the present invention, the output module specifically includes: the fourth switching transistor, the fifth switching transistor, the sixth resistor, the seventh resistor, the eighth resistor, the ninth resistor, the second capacitor and the second operational amplifier; wherein,
a grid electrode of the fourth switching transistor is connected with the first output end of the control module, a source electrode of the fourth switching transistor is connected with the negative input end of the second operational amplifier, and a drain electrode of the fourth switching transistor is connected with one end of the sixth resistor;
the other end of the sixth resistor is connected with the output end of the second operational amplifier;
a grid electrode of the fifth switching transistor is connected with the second output end of the control module, a source electrode of the fifth switching transistor is connected with the negative input end of the second operational amplifier, and a drain electrode of the fifth switching transistor is connected with one end of the seventh resistor;
the other end of the seventh resistor is connected with the output end of the second operational amplifier;
a grid electrode of the sixth switching transistor is connected with a third output end of the control module, a source electrode of the sixth switching transistor is connected with a negative input end of the second operational amplifier, and a drain electrode of the sixth switching transistor is connected with one end of the eighth resistor;
the other end of the eighth resistor is connected with the output end of the second operational amplifier;
one end of the second capacitor is connected with the feedback signal end, and the other end of the second capacitor is connected with one end of the ninth resistor;
the other end of the ninth resistor is connected with the negative input end of the second operational amplifier;
and the positive phase input end of the second operational amplifier is connected with the common voltage signal end.
In a possible implementation manner, in the above-mentioned common voltage compensation circuit provided in an embodiment of the present invention, the control module specifically includes: a fourth NOT gate, a fifth NOT gate, a sixth NOT gate, a fourth AND gate, a fifth AND gate and a sixth AND gate; wherein,
a first input end of the fourth and gate is connected with a second output end of the comparison module, a second input end of the fourth and gate is connected with a first output end of the comparison module, and an output end of the fourth and gate is connected with a grid electrode of the fourth switching transistor;
the input end of the fourth NOT gate is connected with the first output end of the comparison module, and the output end of the fourth NOT gate is connected with the first input end of the fifth AND gate;
a second input end of the fifth and-gate is connected with a second output end of the comparison module, and an output end of the fifth and-gate is connected with a grid electrode of the fifth switching transistor;
the input end of the fifth NOT gate is connected with the first output end of the comparison module, and the output end of the fifth NOT gate is connected with the first input end of the sixth AND gate;
the input end of the sixth not gate is connected with the second output end of the comparison module, and the output end of the sixth not gate is connected with the second input end of the sixth and gate;
and the output end of the sixth AND gate is connected with the grid electrode of the sixth switching transistor.
In a possible implementation manner, in the common voltage compensation circuit provided in an embodiment of the present invention, the comparing module specifically includes: a threshold voltage generation unit and a comparison unit;
a first input end of the threshold voltage generation unit is connected with the first power supply signal end, a second input end of the threshold voltage generation unit is connected with the second power supply signal end, a first output end of the threshold voltage generation unit is connected with a first input end of the comparison unit, and a second output end of the threshold voltage generation unit is connected with a second input end of the comparison unit; the threshold voltage generating unit is used for generating a first threshold voltage and a second threshold voltage according to the signals of the first power supply signal end and the second power supply signal end, and respectively outputting the first threshold voltage and the second threshold voltage to the first input end and the second input end of the comparing unit;
a third input end of the comparison unit is connected with the feedback signal end, a first output end of the comparison unit is connected with a first input end of the control module, and a second output end of the comparison unit is connected with a second input end of the control module; the comparison unit is used for comparing the signal of the feedback signal end with the first threshold voltage and the second threshold voltage respectively and outputting the comparison result to the first input end and the second input end of the control module respectively.
In a possible implementation manner, in the common voltage compensation circuit provided in an embodiment of the present invention, the threshold voltage generating unit specifically includes: a tenth resistor, an eleventh resistor, and a twelfth resistor; wherein,
one end of the tenth resistor is connected with the second power signal end, and the other end of the tenth resistor is respectively connected with one end of the eleventh resistor and the second input end of the comparison unit;
the other end of the eleventh resistor is respectively connected with one end of the twelfth resistor and the first input end of the comparison unit;
the other end of the twelfth resistor is connected with the first power signal end.
In a possible implementation manner, in the common voltage compensation circuit provided in an embodiment of the present invention, the comparing unit specifically includes: a third capacitor, a first comparator and a second comparator; wherein,
one end of the third capacitor is connected with the feedback signal end, and the other end of the third capacitor is respectively connected with the positive phase input ends of the first comparator and the second comparator;
the negative input end of the first comparator is connected with the first output end of the threshold voltage production unit, and the output end of the first comparator is connected with the first input end of the control module;
and the negative input end of the second comparator is connected with the second output end of the threshold voltage production unit, and the output end of the second comparator is connected with the second input end of the control module.
The embodiment of the present invention provides a compensation method for the common voltage compensation circuit, which includes:
generating a threshold voltage according to the signals of the first power supply signal end and the second power supply signal end, and comparing the signal of the feedback signal end with the threshold voltage to generate a comparison result;
generating a corresponding control signal according to the comparison result;
and under the control of a corresponding control signal, generating a corresponding compensation signal according to the signals of the common voltage signal end and the feedback signal end and outputting the compensation signal.
In a possible implementation manner, in the compensation method provided by an embodiment of the present invention, the generating a threshold voltage according to signals of the first power signal terminal and the second power signal terminal, and comparing a signal of the feedback signal terminal with the threshold voltage to generate a comparison result specifically includes:
generating a first threshold voltage and a second threshold voltage according to signals of the first power supply signal terminal and the second power supply signal terminal;
and comparing the signal of the feedback signal end with the first threshold voltage and the second threshold voltage respectively to generate a comparison result.
The embodiment of the invention provides a display panel, which comprises the common voltage compensation circuit provided by the embodiment of the invention.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a common voltage compensation circuit, a compensation method and a display panel, wherein the common voltage compensation circuit comprises: the device comprises a comparison module, a control module and an output module; the comparison module is used for generating a threshold voltage according to signals of the first power supply signal end and the second power supply signal end, comparing the signal of the feedback signal end with the threshold voltage, and respectively outputting a comparison result to a first input end and a second input end of the control module; the control module is used for generating corresponding control signals according to the comparison result output by the comparison module and respectively outputting the control signals to the first control end, the second control end and the third control end of the output module; the output module is used for generating and outputting corresponding compensation signals according to the signals of the common voltage signal end and the feedback signal end under the control of the first control end, the second control end and the third control end. Specifically, the signal of the feedback signal end reflects the fluctuation condition of the common voltage, so that the signal of the feedback signal end is compared with the threshold voltage through the comparison module, a corresponding control signal is generated according to the comparison result, and then a corresponding compensation signal is generated according to the corresponding control signal and output, so that the compensation aiming at the fluctuation condition of the common voltage signal is realized, and the rapid and effective compensation can be performed on the peak voltage of the fluctuation of the common voltage signal.
Drawings
Fig. 1 is a schematic structural diagram of a common voltage compensation circuit according to an embodiment of the present invention;
fig. 2 and fig. 3 are schematic structural diagrams of a common voltage compensation circuit according to an embodiment of the present invention.
Detailed Description
The following describes specific embodiments of a common voltage compensation circuit, a compensation method, and a display panel according to embodiments of the present invention in detail with reference to the accompanying drawings.
An embodiment of the present invention provides a common voltage compensation circuit, as shown in fig. 1, which may include: the device comprises a comparison module 01, a control module 02 and an output module 03; wherein,
a first input end of the comparison module 01 is connected with a first power supply signal end AVDD, a second input end is connected with a second power supply signal end GND, a third input end is connected with a feedback signal end FEED, a first output end is connected with a first input end of the control module 02, and a second output end is connected with a second input end of the control module 02; the comparison module 01 is configured to generate a threshold voltage according to signals of the first power signal terminal AVDD and the second power signal terminal GND, compare a signal of the feedback signal terminal fed with the threshold voltage, and output comparison results to a first input terminal and a second input terminal of the control module 02 respectively;
a first output end of the control module 02 is connected with a first control end of the output module 03, a second output end is connected with a second control end of the output module 03, and a third output end is connected with a third control end of the output module 03; the control module 02 is configured to generate corresponding control signals according to the comparison result output by the comparison module 01 and output the control signals to the first control end, the second control end, and the third control end of the output module 03 respectively;
a first input end of the OUTPUT module 03 is connected to a common voltage signal terminal VCOM, a second input end is connected to a feedback signal terminal fed, and an OUTPUT end OUTPUT is used for outputting a compensation voltage signal; the output module 03 is configured to generate and output a corresponding compensation signal according to the signals of the common voltage signal terminal VCOM and the feedback signal terminal fed under the control of the first control terminal, the second control terminal, and the third control terminal.
In the common voltage compensation circuit provided by the embodiment of the invention, the signal of the feedback signal end reflects the fluctuation condition of the common voltage, so that the signal of the feedback signal end is compared with the threshold voltage through the comparison module, the corresponding control signal is generated according to the comparison result, the corresponding compensation signal is generated according to the corresponding control signal and is output, the compensation aiming at the fluctuation condition of the common voltage signal is realized, and the peak voltage of the fluctuation of the common voltage signal can be quickly and effectively compensated.
In a specific implementation, in the common voltage compensation circuit provided in the embodiment of the present invention, as shown in fig. 2, the output module 03 specifically includes: a first switch transistor T1, a second switch transistor T2, a third switch transistor T3, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1 and a first operational amplifier Y1; the gate of the first switching transistor T1 is connected to the first output terminal of the control module 02, the source is connected to the common voltage signal terminal VCOM and one end of the first resistor R1, and the drain is connected to the positive input terminal of the first operational amplifier Y1; the gate of the second switching transistor T2 is connected to the second output terminal of the control module 02, the source is connected to the other end of the first resistor R1 and one end of the second resistor R2, and the drain is connected to the positive input terminal of the first operational amplifier Y1; the gate of the third switching transistor T3 is connected to the third output terminal of the control module 02, the source is connected to the other end of the second resistor R2 and one end of the third resistor R3, and the drain is connected to the positive input terminal of the first operational amplifier Y1; the other end of the third resistor R3 is connected to the second power signal terminal GND; one end of the first capacitor C1 is connected with the feedback signal end fed, and the other end is connected with one end of the fourth resistor R4; the other end of the fourth resistor R4 is respectively connected with one end of the fifth resistor R5 and the negative input end of the first operational amplifier Y1; the other end of the fifth resistor R5 is connected to the OUTPUT terminal OUTPUT1 of the first operational amplifier Y1.
Specifically, in the common voltage compensation circuit provided in the embodiment of the present invention, the first switch transistor may be turned on under the control of the first output terminal of the control module, and the turned-on first switch transistor transmits a signal of the common voltage signal terminalVcom is output to the positive input terminal of the first operational amplifier, and the output signal of the first operational amplifier isWherein VFEEDIs the signal of the feedback signal end; the second switch transistor can be conducted under the control of a second output end of the control module, the conducted second switch transistor conducts the other end of the first resistor and one end of the second resistor with a positive phase input end of the first operational amplifier respectively, and then a signal output by an output end of the first operational amplifier isThe third switching transistor can be conducted under the control of a third output end of the control module, the conducted third switching transistor respectively conducts the other end of the second resistor and one end of the third resistor with the positive phase input end of the first operational amplifier, and then the signal output by the output end of the first operational amplifier isTherefore, the first switching transistor, the second switching transistor and the third switching transistor are controlled to be turned on according to different control signals output by the control module, so that a signal at the positive input end of the first operational amplifier is changed, and further, a direct current component output by the first operational amplifier is changed, and therefore rapid compensation for fluctuation of a common voltage signal can be achieved on the premise that the response frequency of the feedback circuit is not affected.
In a specific implementation, as shown in fig. 2, in the common voltage compensation circuit provided in the embodiment of the present invention, the control module 02 specifically includes: a first not gate F1, a second not gate F2, a third not gate F3, a first and gate U1, a second and gate U2 and a third and gate U3; the input end of the first not gate F1 is connected to the second output end of the comparison module 01, and the output end is connected to the first input end of the first and gate U1; the input end of the second not gate F2 is connected with the first output end of the comparison module 01, and the output end is connected with the second input end of the first AND gate U1; the output end of the first and gate U1 is connected to the gate of the first switching transistor T1; the input end of the third not gate F3 is connected with the first output end of the comparison module 01, and the output end of the third not gate F3 is connected with the first input end of the second and gate U2; a second input end of the second and gate U2 is connected to a second output end of the comparison module 01, and an output end is connected to a gate of the second switching transistor T2; a first input terminal of the third and gate U3 is connected to a first output terminal of the comparing module 01, a second input terminal is connected to a second output terminal of the comparing module 01, and an output terminal is connected to a gate of the third switching transistor T3.
Specifically, in the common voltage compensation circuit provided in the embodiment of the present invention, the comparison result generated by the comparison module is output to the input terminals of the first not gate, the second not gate, and the third not gate of the control module through the first output terminal and the second output terminal, respectively, and the second input terminal of the second and gate and the first input terminal and the second input terminal of the third and gate, so that the corresponding control signal is generated and output to the gates of the first switching transistor, the second switching transistor, and the third switching transistor through the logic operation of the first not gate, the second not gate, the third not gate, the first and gate, the second and gate, and the third and gate in the control module, respectively, so as to control the on/off of the first switching transistor, the second switching transistor, and the third switching transistor, and further enable the output module to output different compensation signals correspondingly, thereby implementing compensation for the fluctuation condition of the common voltage signal, this allows for a fast and efficient compensation of the spike voltage of the common voltage signal fluctuations.
In a specific implementation, in the common voltage compensation circuit provided in the embodiment of the present invention, as shown in fig. 3, the output module 03 may specifically include: a fourth switching transistor T4, a fifth switching transistor T5, a sixth switching transistor T6, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a second capacitor C2 and a second operational amplifier Y2; the gate of the fourth switching transistor T4 is connected to the first output terminal of the control module 02, the source is connected to the negative input terminal of the second operational amplifier Y2, and the drain is connected to one end of the sixth resistor R6; the other end of the sixth resistor R6 is connected to the OUTPUT terminal OUTPUT2 of the second operational amplifier Y2; a gate of the fifth switching transistor T5 is connected to the second output terminal of the control module 02, a source thereof is connected to the negative input terminal of the second operational amplifier Y2, and a drain thereof is connected to one end of the seventh resistor R7; the other end of the seventh resistor R7 is connected to the OUTPUT terminal OUTPUT2 of the second operational amplifier Y2; a gate of the sixth switching transistor T6 is connected to the third output terminal of the control module 02, a source thereof is connected to the negative input terminal of the second operational amplifier Y2, and a drain thereof is connected to one end of the eighth resistor R8; the other end of the eighth resistor R8 is connected to the OUTPUT terminal OUTPUT2 of the second operational amplifier Y2; one end of the second capacitor C2 is connected to the feedback signal end fed, and the other end is connected to one end of the ninth resistor R9; the other end of the ninth resistor R9 is connected with the negative input end of the second operational amplifier Y2; the non-inverting input terminal of the second operational amplifier Y2 is connected to the common voltage signal terminal VCOM.
Specifically, in the common voltage compensation circuit provided in the embodiment of the present invention, the fourth switching transistor may be turned on under the control of the first output terminal of the control module, the turned-on fourth switching transistor turns on the negative input terminal of the second operational amplifier and one end of the sixth resistor, and then the signal output by the output terminal of the second operational amplifier isWherein VFEEDIs the signal of the feedback signal end; the fifth switching transistor can be conducted under the control of the second output end of the control module, the conducted fifth switching transistor conducts the negative input end of the second operational amplifier with one end of the seventh resistor, and then the signal output by the output end of the second operational amplifier isThe sixth switching transistor may be turned on under the control of the third output terminal of the control module, the turned-on sixth switching transistor turns on the negative input terminal of the second operational amplifier and one end of the eighth resistor, and then a signal output by the output terminal of the second operational amplifier isAccording to different control signals output by the control module, the fourth switching transistor, the fifth switching transistor and the sixth switching transistor are controlled to be turned on, so that the amplification factor of the second operational amplifier is changed, the compensation signal output by the second operational amplifier is changed, and rapid compensation can be performed on the peak voltage of the fluctuation of the public voltage signal.
In a specific implementation, as shown in fig. 3, in the common voltage compensation circuit provided in the embodiment of the present invention, the control module 02 may specifically include: a fourth not gate F4, a fifth not gate F5, a sixth not gate F6, a fourth and gate U4, a fifth and gate U5 and a sixth and gate U6; a first input end of the fourth and gate U4 is connected to a second output end of the comparison module 01, a second input end of the fourth and gate U4 is connected to a first output end of the comparison module 01, and an output end of the fourth and gate U4 is connected to a gate of the fourth switching transistor T4; the input end of the fourth not gate F4 is connected with the first output end of the comparison module 01, and the output end of the fourth not gate F4 is connected with the first input end of the fifth and gate U5; a second input end of the fifth and gate U5 is connected to a second output end of the comparison module 01, and an output end is connected to a gate of the fifth switching transistor T5; the input end of the fifth not gate F5 is connected with the first output end of the comparison module 01, and the output end of the fifth not gate F5 is connected with the first input end of the sixth AND gate U6; the input end of the sixth not gate U6 is connected with the second output end of the comparison module 01, and the output end of the sixth not gate U6 is connected with the second input end of the sixth AND gate U6; the output of the sixth and gate U6 is connected to the gate of a sixth switching transistor T6.
Specifically, in the common voltage compensation circuit provided in the embodiment of the present invention, the comparison result generated by the comparison module is output to the input terminals of the fourth not gate, the fifth not gate, and the sixth not gate of the control module through the first output terminal and the second output terminal, respectively, and the first input terminal and the second input terminal of the fourth and gate and the second input terminal of the fifth and gate, respectively, so that through the logic operation of the fourth not gate, the fifth not gate, the sixth not gate, the fourth and gate, the fifth and gate, and the sixth and gate in the control module, the corresponding control signal is generated and output to the gates of the fourth switching transistor, the fifth switching transistor, and the sixth switching transistor, respectively, so as to control the on/off of the fourth switching transistor, the fifth switching transistor, and the sixth switching transistor, and further enable the output module to output different compensation signals correspondingly, thereby implementing compensation for the fluctuation condition of the common voltage signal, this allows for a fast and efficient compensation of the spike voltage of the common voltage signal fluctuations.
In a specific implementation, as shown in fig. 2 and 3, in the common voltage compensation circuit provided in the embodiment of the present invention, the comparing module 01 may specifically include: a threshold voltage generation unit 011 and a comparison unit 012; a first input end of the threshold voltage generation unit 011 is connected to a first power signal end AVDD, a second input end is connected to a second power signal end GND, a first output end is connected to a first input end of the comparison unit 012, and a second output end is connected to a second input end of the comparison unit 012; the threshold voltage generation unit 011 is configured to generate a first threshold voltage and a second threshold voltage according to signals of the first power signal terminal AVDD and the second power signal terminal GND, and output the first threshold voltage and the second threshold voltage to a first input terminal and a second input terminal of the comparison unit 012, respectively; a third input end of the comparing unit 012 is connected to the feedback signal end fed, a first output end is connected to a first input end of the control module 02, and a second output end is connected to a second input end of the control module 02; the comparing unit 012 is configured to compare the signal of the feedback signal terminal fed with the first threshold voltage and the second threshold voltage, and output comparison results to the first input terminal and the second input terminal of the control module 02.
Specifically, in the common voltage compensation circuit provided in the embodiment of the present invention, the comparison module may specifically include a threshold voltage generation unit and a comparison unit, the threshold voltage generation unit generates a first threshold voltage and a second threshold voltage according to signals of the first power signal terminal and the second power signal terminal, and then the comparison unit compares a signal of the feedback signal terminal with the first threshold voltage and the second threshold voltage respectively, and outputs a comparison result to the first input terminal and the second input terminal of the control module respectively, so that the control module generates a corresponding control signal according to the comparison result, and the corresponding control signal controls the output module to output a corresponding compensation signal, thereby implementing compensation for fluctuation of the common voltage signal.
In a specific implementation, in the common voltage compensation circuit provided in the embodiment of the present invention, as shown in fig. 2 and fig. 3, the threshold voltage generation unit 011 may specifically include: a tenth resistor R10, an eleventh resistor R11, and a twelfth resistor R12; one end of the tenth resistor R10 is connected to the second power signal terminal GND, and the other end of the tenth resistor R10 is connected to one end of the eleventh resistor R11 and the second input terminal of the comparing unit 012; the other end of the eleventh resistor R11 is connected to one end of the twelfth resistor R12 and the first input terminal of the comparing unit 012, respectively; the other end of the twelfth resistor R12 is connected to the first power signal terminal AVDD. Specifically, by setting the resistance values of the tenth resistor R10, the eleventh resistor R11, and the twelfth resistor R12, the voltage division of the respective resistors can be changed, thereby changing the magnitudes of the threshold voltages input to the first input terminal and the second input terminal of the comparison unit, setting the threshold voltage input to the first input terminal of the comparison unit to the first threshold voltage V1The first threshold voltage isSetting the threshold voltage input to the second input terminal of the comparison unit to a second threshold voltage V2The second threshold voltage isThe threshold voltage generating unit generates a first threshold voltage and a second threshold voltage through voltage division of the tenth resistor, the eleventh resistor and the twelfth resistor, and outputs the first threshold voltage and the second threshold voltage to the first input terminal and the second input terminal of the comparing unit, respectively.
In a specific implementation, as shown in fig. 2 and 3, in the common voltage compensation circuit provided in the embodiment of the present invention, the comparing unit may specifically include: a third capacitor C3, a first comparator B1 and a second comparator B2; one end of the third capacitor C3 is connected to the feedback signal terminal fed, and the other end is connected to the non-inverting input terminals of the first comparator B1 and the second comparator B2 respectivelyConnecting; a negative input end of the first comparator B1 is connected with a first output end of the threshold voltage production unit 011, and an output end is connected with a first input end of the control module 02; a negative input end of the second comparator B2 is connected to the second output end of the threshold voltage generation unit 011, and an output end is connected to the second input end of the control module 02. Specifically, the threshold voltage generation unit generates a first threshold voltage ofAnd a second threshold voltage ofRespectively input to the negative input terminal of the first comparator and the negative input terminal of the second comparator, and the first comparator and the second comparator feed back the signal V of the signal terminalFEEDRespectively corresponding to the first threshold voltage V1And a second threshold voltage V2And comparing, and respectively outputting the comparison results to a first input end and a second input end of the control module.
Wherein when VFEED≤V2When the output module is in a normal state, the first comparator and the second comparator respectively output a first logic level signal (for example, a logic low level signal 0) to a first input end and a second input end of the control module, and finally output corresponding control signals to a first control end, a second control end and a third control end of the output module through logic operation of each NOT gate and an AND gate in the control module; when V is2<VFEED<V1When the first comparator outputs a first logic level signal to a first input end of the control module, the second comparator outputs a second logic level signal (such as a logic high level signal 1) to a second input end of the control module, and corresponding control signals are finally output to first, second and third control ends of the output module through logic operation of each NOT gate and an AND gate in the control module; when V is1≤VFEEDThe first comparator and the second comparator respectively output a second logic level signal to the first input end and the second input end of the control module, and finally output corresponding control signals to the first input end and the second input end of the control module through the logic operation of each NOT gate and each AND gate in the control moduleThe first control end, the second control end and the third control end of the output module.
The operation of the specific common voltage compensation circuit shown in fig. 2 and 3 is described below:
the first threshold voltage and the second threshold voltage are respectively V1And V2: wherein,
setting the first logic level signal as 0 and the second logic level signal as 1, and feeding back the signal V of the signal end through the first comparator and the second comparatorFEEDAnd V1、V2Comparing, wherein the comparison result is a logic level which can be identified by the NAND gates, and a logic circuit formed by the NAND gates performs logic operation on the result output by the comparator so as to control the on or off of the switching transistor;
in the circuit shown in FIG. 2, when V isFEED≤V2At this time, the first comparator B1 and the second comparator B2 respectively OUTPUT 0 to the input terminals of the first not gate F1, the second not gate F2 and the third not gate F3, and the second input terminal of the second and gate U2 and the first input terminal and the second input terminal of the third and gate U3, and the control signal finally OUTPUT through the logical operations of the not gates and the and gates causes the first switching transistor T1 to be turned on, the second switching transistor T2 and the third switching transistor T3 to be turned off, so that the turned-on first switching transistor T1 OUTPUTs the signal Vcom at the common voltage signal terminal to the non-inverting input terminal of the first operational amplifier Y1, and the OUTPUT terminal OUTPUT1 of the first operational amplifier Y1 OUTPUTs a signal of 0 to the non-inverting input terminal of the first operational amplifier Y1
When V is2<VFEED<V1While the first comparator B1 outputs 0 to the inputs of the second NOT gate F2, the third NOT gate F3, and the first input of the third AND gate U3, the second comparator B2 outputs 1 to the third NOT gate U3The control signal finally OUTPUT through the logical operations of the not gate and the and gate makes the second switch transistor T2 turned on, the first switch transistor T1 and the third switch transistor T3 turned off by the input terminal of the not gate F1 and the second input terminal of the third and gate U3, so that the turned-on second switch transistor T2 turns on the other end of the first resistor R1 and one end of the second resistor R2 to the non-inverting input terminal of the first operational amplifier Y1, and the OUTPUT terminal OUTPUT1 of the first operational amplifier Y1 OUTPUTs a signal of:
when V is1≤VFEEDWhen the first comparator B1 and the second comparator B2 respectively OUTPUT1 to the input terminals of the first not gate F1, the second not gate F2 and the third not gate F3, and the second input terminal of the second and gate U2 and the first input terminal and the second input terminal of the third and gate U3, the control signal finally OUTPUT through the logical operations of the not gates and the and gates turns on the third switching transistor T3, turns off the first switching transistor T1 and the second switching transistor T2, the turned-on third switching transistor turns on the other end of the second resistor R2 and one end of the third resistor R3 respectively with the non-inverting input terminal of the first operational amplifier Y1, and the OUTPUT terminal OUTPUT1 of the first operational amplifier Y1 OUTPUTs a signal of 1 to the non-inverting input terminal of the first operational amplifier Y1The circuit does not influence the response frequency of the feedback circuit, and can realize quick and effective compensation of the peak voltage of the fluctuation of the common voltage signal.
In the circuit shown in FIG. 3, when V isFEED≤V2When the first comparator B1 and the second comparator B2 respectively output 0 to the input terminals of the fourth not gate F4, the fifth not gate F5 and the sixth not gate F6, and the first input terminal and the second input terminal of the fourth and gate U4 and the second input terminal of the fifth and gate U5, the control signal finally output through the logical operations of the respective not gates and gates makes the sixth switching transistor T6 conductive, and the fourth switching transistor T4 and the fifth switching transistor T5Since the transistor T5 is turned off, the turned-on sixth switching transistor T6 turns on the negative input terminal of the second operational amplifier Y2 and the one terminal of the eighth resistor R8, and the OUTPUT terminal OUTPUT2 of the second operational amplifier Y2 OUTPUTs the signal of "OUTPUT
When V is2<VFEED<V1When the first comparator B1 OUTPUTs 0 to the second input terminal of the fourth and gate U4 and the input terminals of the fourth and gate F4 and the fifth not gate F5, the second comparator B2 OUTPUTs 1 to the first input terminal of the fourth and gate U4, the second input terminal of the fifth and gate U5 and the input terminal of the sixth and gate F6, the control signal finally OUTPUT by the logical operations of the respective not gates and gates turns on the fifth switching transistor T5, turns off the fourth switching transistor T4 and the sixth switching transistor T6, so that the turned-on fifth switching transistor T5 turns on the negative input terminal of the second operational amplifier Y2 and one terminal of the seventh resistor R7, and the OUTPUT terminal OUTPUT put2 of the second operational amplifier Y2 OUTPUTs a signal of outt 2 of 0
When V is1≤VFEEDWhen the first comparator B1 and the second comparator B2 respectively OUTPUT1 to the input terminals of the fourth not gate F4, the fifth not gate F5 and the sixth not gate F6, and the first input terminal and the second input terminal of the fourth and gate U4 and the second input terminal of the fifth and gate U5, the control signal finally OUTPUT through the logical operations of the not gates and the and gates turns on the fourth switching transistor T4, turns off the fifth switching transistor T5 and the sixth switching transistor T6, the turned-on fourth switching transistor T4 turns on the negative input terminal of the second operational amplifier Y2 and one end of the sixth resistor R6, and the OUTPUT terminal OUTPUT port 2 of the second operational amplifier Y2 OUTPUTs a signal of 1 to the fourth not gate F4, the fifth not gate F5 and the second input terminal of the fifth and gate U5, and the turned on fourth switching transistor T4The circuit realizes the realization by adopting different compensation multiples according to the fluctuation condition of the common voltage signalThe fluctuation compensation of the common voltage signal can realize quick and effective compensation of the peak voltage of the fluctuation of the common voltage signal.
It should be noted that the switching Transistor mentioned in the above embodiments of the present invention may be a Thin Film Transistor (TFT) or a Metal oxide semiconductor field effect Transistor (MOS), and is not limited herein. In specific implementations, the sources and drains of these transistors may be interchanged without specific distinction. A thin film transistor will be described as an example in describing specific embodiments.
Based on the same inventive concept, an embodiment of the present invention provides a compensation method for the common voltage compensation circuit, which may specifically include the following steps:
generating a threshold voltage according to signals of a first power supply signal end and a second power supply signal end, and comparing the signal of a feedback signal end with the threshold voltage to generate a comparison result;
generating a corresponding control signal according to the comparison result;
and under the control of the corresponding control signal, generating and outputting a corresponding compensation signal according to the signals of the common voltage signal end and the feedback signal end.
Specifically, in the compensation method provided in the embodiment of the present invention, the fluctuation condition of the common voltage is reflected by the signal of the feedback signal end, and then the signal of the feedback signal end is compared with the threshold voltage, and a corresponding control signal is generated according to the comparison result, and then a corresponding compensation signal is generated according to the corresponding control signal and output, so that compensation for the fluctuation condition of the common voltage signal is realized, and thus, the peak voltage of the fluctuation of the common voltage signal can be quickly and effectively compensated.
In a specific implementation, in the compensation method provided in the embodiment of the present invention, the generating a threshold voltage according to signals of the first power signal terminal and the second power signal terminal, and comparing the signal of the feedback signal terminal with the threshold voltage to generate a comparison result may specifically include: generating a first threshold voltage and a second threshold voltage according to signals of a first power supply signal end and a second power supply signal end; and comparing the signal of the feedback signal end with the first threshold voltage and the second threshold voltage respectively to generate a comparison result. Specifically, the signal of the feedback signal end is compared with the first threshold voltage and the second threshold voltage, and the comparison result is correspondingly generated and output, so that the compensation aiming at the fluctuation condition of the common voltage signal can be realized.
Based on the same inventive concept, an embodiment of the present invention provides a display panel, including the common voltage compensation circuit provided in the embodiment of the present invention. Since the principle of the display panel to solve the problem is similar to that of the common voltage compensation circuit, the specific implementation of the display panel can be referred to the embodiment of the common voltage compensation circuit, and repeated details are not repeated.
The embodiment of the invention provides a common voltage compensation circuit, a compensation method and a display panel, wherein the common voltage compensation circuit comprises: the device comprises a comparison module, a control module and an output module; the comparison module is used for generating a threshold voltage according to signals of the first power supply signal end and the second power supply signal end, comparing the signal of the feedback signal end with the threshold voltage, and respectively outputting a comparison result to a first input end and a second input end of the control module; the control module is used for generating corresponding control signals according to the comparison result output by the comparison module and respectively outputting the control signals to the first control end, the second control end and the third control end of the output module; the output module is used for generating and outputting corresponding compensation signals according to the signals of the common voltage signal end and the feedback signal end under the control of the first control end, the second control end and the third control end. Specifically, the signal of the feedback signal end reflects the fluctuation condition of the common voltage, so that the signal of the feedback signal end is compared with the threshold voltage through the comparison module, a corresponding control signal is generated according to the comparison result, and then a corresponding compensation signal is generated according to the corresponding control signal and output, so that the compensation aiming at the fluctuation condition of the common voltage signal is realized, and the rapid and effective compensation can be performed on the peak voltage of the fluctuation of the common voltage signal.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (11)
1. A common voltage compensation circuit, comprising: the device comprises a comparison module, a control module and an output module; wherein,
the first input end of the comparison module is connected with the first power supply signal end, the second input end of the comparison module is connected with the second power supply signal end, the third input end of the comparison module is connected with the feedback signal end, the first output end of the comparison module is connected with the first input end of the control module, and the second output end of the comparison module is connected with the second input end of the control module; the comparison module is used for generating a threshold voltage according to the signals of the first power supply signal end and the second power supply signal end, comparing the signal of the feedback signal end with the threshold voltage, and respectively outputting the comparison result to a first input end and a second input end of the control module;
the first output end of the control module is connected with the first control end of the output module, the second output end of the control module is connected with the second control end of the output module, and the third output end of the control module is connected with the third control end of the output module; the control module is used for generating corresponding control signals according to the comparison result output by the comparison module and outputting the control signals to the first control end, the second control end and the third control end of the output module respectively;
the first input end of the output module is connected with a common voltage signal end, the second input end of the output module is connected with the feedback signal end, and the output end of the output module is used for outputting a compensation voltage signal; the output module is used for generating and outputting corresponding compensation signals according to the signals of the common voltage signal end and the feedback signal end under the control of the first control end, the second control end and the third control end.
2. The common voltage compensation circuit of claim 1, wherein the output module specifically comprises: the circuit comprises a first switching transistor, a second switching transistor, a third switching transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor and a first operational amplifier; wherein,
the grid electrode of the first switching transistor is connected with the first output end of the control module, the source electrode of the first switching transistor is respectively connected with the common voltage signal end and one end of the first resistor, and the drain electrode of the first switching transistor is connected with the positive input end of the first operational amplifier;
the grid electrode of the second switching transistor is connected with the second output end of the control module, the source electrode of the second switching transistor is respectively connected with the other end of the first resistor and one end of the second resistor, and the drain electrode of the second switching transistor is connected with the positive input end of the first operational amplifier;
the grid electrode of the third switching transistor is connected with the third output end of the control module, the source electrode of the third switching transistor is respectively connected with the other end of the second resistor and one end of the third resistor, and the drain electrode of the third switching transistor is connected with the positive input end of the first operational amplifier;
the other end of the third resistor is connected with the second power supply signal end;
one end of the first capacitor is connected with the feedback signal end, and the other end of the first capacitor is connected with one end of the fourth resistor;
the other end of the fourth resistor is connected with one end of the fifth resistor and the negative input end of the first operational amplifier respectively;
the other end of the fifth resistor is connected with the output end of the first operational amplifier.
3. The common voltage compensation circuit of claim 2, wherein the control module specifically comprises: the first NOT gate, the second NOT gate, the third NOT gate, the first AND gate, the second AND gate and the third AND gate; wherein,
the input end of the first NOT gate is connected with the second output end of the comparison module, and the output end of the first NOT gate is connected with the first input end of the first AND gate;
the input end of the second NOT gate is connected with the first output end of the comparison module, and the output end of the second NOT gate is connected with the second input end of the first AND gate;
the output end of the first AND gate is connected with the grid of the first switch transistor;
the input end of the third NOT gate is connected with the first output end of the comparison module, and the output end of the third NOT gate is connected with the first input end of the second AND gate;
a second input end of the second AND gate is connected with a second output end of the comparison module, and an output end of the second AND gate is connected with a grid electrode of the second switching transistor;
and a first input end of the third AND gate is connected with a first output end of the comparison module, a second input end of the third AND gate is connected with a second output end of the comparison module, and an output end of the third AND gate is connected with a grid electrode of the third switching transistor.
4. The common voltage compensation circuit of claim 1, wherein the output module specifically comprises: the fourth switching transistor, the fifth switching transistor, the sixth resistor, the seventh resistor, the eighth resistor, the ninth resistor, the second capacitor and the second operational amplifier; wherein,
a grid electrode of the fourth switching transistor is connected with the first output end of the control module, a source electrode of the fourth switching transistor is connected with the negative input end of the second operational amplifier, and a drain electrode of the fourth switching transistor is connected with one end of the sixth resistor;
the other end of the sixth resistor is connected with the output end of the second operational amplifier;
a grid electrode of the fifth switching transistor is connected with the second output end of the control module, a source electrode of the fifth switching transistor is connected with the negative input end of the second operational amplifier, and a drain electrode of the fifth switching transistor is connected with one end of the seventh resistor;
the other end of the seventh resistor is connected with the output end of the second operational amplifier;
a grid electrode of the sixth switching transistor is connected with a third output end of the control module, a source electrode of the sixth switching transistor is connected with a negative input end of the second operational amplifier, and a drain electrode of the sixth switching transistor is connected with one end of the eighth resistor;
the other end of the eighth resistor is connected with the output end of the second operational amplifier;
one end of the second capacitor is connected with the feedback signal end, and the other end of the second capacitor is connected with one end of the ninth resistor;
the other end of the ninth resistor is connected with the negative input end of the second operational amplifier;
and the positive phase input end of the second operational amplifier is connected with the common voltage signal end.
5. The common voltage compensation circuit of claim 4, wherein the control module specifically comprises: a fourth NOT gate, a fifth NOT gate, a sixth NOT gate, a fourth AND gate, a fifth AND gate and a sixth AND gate; wherein,
a first input end of the fourth and gate is connected with a second output end of the comparison module, a second input end of the fourth and gate is connected with a first output end of the comparison module, and an output end of the fourth and gate is connected with a grid electrode of the fourth switching transistor;
the input end of the fourth NOT gate is connected with the first output end of the comparison module, and the output end of the fourth NOT gate is connected with the first input end of the fifth AND gate;
a second input end of the fifth and-gate is connected with a second output end of the comparison module, and an output end of the fifth and-gate is connected with a grid electrode of the fifth switching transistor;
the input end of the fifth NOT gate is connected with the first output end of the comparison module, and the output end of the fifth NOT gate is connected with the first input end of the sixth AND gate;
the input end of the sixth not gate is connected with the second output end of the comparison module, and the output end of the sixth not gate is connected with the second input end of the sixth and gate;
and the output end of the sixth AND gate is connected with the grid electrode of the sixth switching transistor.
6. The common voltage compensation circuit according to any one of claims 1 to 5, wherein the comparison module specifically comprises: a threshold voltage generation unit and a comparison unit;
a first input end of the threshold voltage generation unit is connected with the first power supply signal end, a second input end of the threshold voltage generation unit is connected with the second power supply signal end, a first output end of the threshold voltage generation unit is connected with a first input end of the comparison unit, and a second output end of the threshold voltage generation unit is connected with a second input end of the comparison unit; the threshold voltage generating unit is used for generating a first threshold voltage and a second threshold voltage according to the signals of the first power supply signal end and the second power supply signal end, and respectively outputting the first threshold voltage and the second threshold voltage to the first input end and the second input end of the comparing unit;
a third input end of the comparison unit is connected with the feedback signal end, a first output end of the comparison unit is connected with a first input end of the control module, and a second output end of the comparison unit is connected with a second input end of the control module; the comparison unit is used for comparing the signal of the feedback signal end with the first threshold voltage and the second threshold voltage respectively and outputting the comparison result to the first input end and the second input end of the control module respectively.
7. The common voltage compensation circuit according to claim 6, wherein the threshold voltage generation unit specifically comprises: a tenth resistor, an eleventh resistor, and a twelfth resistor; wherein,
one end of the tenth resistor is connected with the second power signal end, and the other end of the tenth resistor is respectively connected with one end of the eleventh resistor and the second input end of the comparison unit;
the other end of the eleventh resistor is respectively connected with one end of the twelfth resistor and the first input end of the comparison unit;
the other end of the twelfth resistor is connected with the first power signal end.
8. The common voltage compensation circuit according to claim 6, wherein the comparison unit specifically comprises: a third capacitor, a first comparator and a second comparator; wherein,
one end of the third capacitor is connected with the feedback signal end, and the other end of the third capacitor is respectively connected with the positive phase input ends of the first comparator and the second comparator;
the negative input end of the first comparator is connected with the first output end of the threshold voltage production unit, and the output end of the first comparator is connected with the first input end of the control module;
and the negative input end of the second comparator is connected with the second output end of the threshold voltage production unit, and the output end of the second comparator is connected with the second input end of the control module.
9. A compensation method of a common voltage compensation circuit according to any one of claims 1 to 8, comprising:
generating a threshold voltage according to the signals of the first power supply signal end and the second power supply signal end, and comparing the signal of the feedback signal end with the threshold voltage to generate a comparison result;
generating a corresponding control signal according to the comparison result;
and under the control of a corresponding control signal, generating a corresponding compensation signal according to the signals of the common voltage signal end and the feedback signal end and outputting the compensation signal.
10. The compensation method of claim 9, wherein the generating a threshold voltage according to the signals of the first power signal terminal and the second power signal terminal, and comparing the signal of the feedback signal terminal with the threshold voltage to generate a comparison result comprises:
generating a first threshold voltage and a second threshold voltage according to signals of the first power supply signal terminal and the second power supply signal terminal;
and comparing the signal of the feedback signal end with the first threshold voltage and the second threshold voltage respectively to generate a comparison result.
11. A display panel comprising the common voltage compensation circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610076590.5A CN105513527B (en) | 2016-02-03 | 2016-02-03 | A kind of common electric voltage compensation circuit, compensation method and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610076590.5A CN105513527B (en) | 2016-02-03 | 2016-02-03 | A kind of common electric voltage compensation circuit, compensation method and display panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105513527A CN105513527A (en) | 2016-04-20 |
| CN105513527B true CN105513527B (en) | 2018-03-23 |
Family
ID=55721462
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610076590.5A Active CN105513527B (en) | 2016-02-03 | 2016-02-03 | A kind of common electric voltage compensation circuit, compensation method and display panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105513527B (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 generating circuit and generating 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 |
| CN115346461A (en) * | 2022-08-09 | 2022-11-15 | 惠科股份有限公司 | Public voltage compensation method, device, display device and readable storage medium |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217680A (en) * | 2014-08-29 | 2014-12-17 | 重庆京东方光电科技有限公司 | Public voltage compensation circuit and method, array substrate and display device |
| CN104575398A (en) * | 2015-02-10 | 2015-04-29 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof and display device |
| CN104700768A (en) * | 2015-04-03 | 2015-06-10 | 京东方科技集团股份有限公司 | Common voltage compensation circuit, common voltage compensation method and display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI406247B (en) * | 2009-05-04 | 2013-08-21 | Au Optronics Corp | Common-voltage compensation circuit and compensation method for use in a liquid crystal display |
-
2016
- 2016-02-03 CN CN201610076590.5A patent/CN105513527B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104217680A (en) * | 2014-08-29 | 2014-12-17 | 重庆京东方光电科技有限公司 | Public voltage compensation circuit and method, array substrate and display device |
| CN104575398A (en) * | 2015-02-10 | 2015-04-29 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof and display device |
| CN104700768A (en) * | 2015-04-03 | 2015-06-10 | 京东方科技集团股份有限公司 | Common voltage compensation circuit, common voltage compensation method and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105513527A (en) | 2016-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105513527B (en) | A kind of common electric voltage compensation circuit, compensation method and display panel | |
| US8692577B2 (en) | Driver circuit | |
| US10026496B2 (en) | Shift register unit and method for driving the same, gate drive circuit and display device | |
| US11443666B2 (en) | Drive circuit for adjusting a voltage required for aging detection using a feedback circuit, and display panel | |
| KR101894199B1 (en) | Scanning driving circuit and its NAND logic operation circuit | |
| US8248147B2 (en) | Power switch circuit for single power supply | |
| CN106817115B (en) | A power-on delay circuit and method | |
| KR102176453B1 (en) | Common electrode driving module and liquid crystal display panel | |
| US11663943B2 (en) | Drive circuit and display panel | |
| CN108172179B (en) | Power management circuit | |
| JP2015171140A (en) | Drive module and display device | |
| CN105632395B (en) | A kind of compensation circuit and display device of public electrode voltages | |
| CN105654888A (en) | Common electrode voltage compensating circuit and display device | |
| US20130194251A1 (en) | Panel driving device having a source driving circuit, and liquid crystal display apparatus having the same | |
| US9886892B2 (en) | Gate driving circuit, gate driving method, and display apparatus | |
| US9696737B2 (en) | Surge current compensating circuit and comparator module | |
| JP5516260B2 (en) | Negative power supply control circuit | |
| CN108572690B (en) | Current mirror circuit | |
| CN203573622U (en) | Voltage comparison circuit and liquid crystal display comprising same | |
| US8575535B2 (en) | Sensing devices and electronic apparatuses using the same | |
| US9647550B2 (en) | Negative voltage signal generation circuit | |
| US20130162238A1 (en) | Reference potential generation circuit | |
| CN108682403B (en) | Gamma voltage switching device and liquid crystal display device | |
| TWI401883B (en) | Switching power supply circuit | |
| TW201616143A (en) | Power management system and detection apparatus for power module thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |