CN102956214A - Common electrode driving unit, liquid crystal display panel and liquid crystal display device - Google Patents
Common electrode driving unit, liquid crystal display panel and liquid crystal display device Download PDFInfo
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- CN102956214A CN102956214A CN2012104679741A CN201210467974A CN102956214A CN 102956214 A CN102956214 A CN 102956214A CN 2012104679741 A CN2012104679741 A CN 2012104679741A CN 201210467974 A CN201210467974 A CN 201210467974A CN 102956214 A CN102956214 A CN 102956214A
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Abstract
The embodiment od of the invention provides a common electrode driving unit, a liquid crystal display panel and a liquid crystal display device, and the common electrode driving unit is used for providing driving voltage for a common electrode in the liquid crystal display panel. The liquid crystal display panel comprises a pixel electrode and a grid driving unit. The invention is characterized in that: the common electrode driving unit comprises an output unit which is connected between the grid driving unit and the common electrode; the output unit is used for correspondingly outputting a third driving voltage and a fourth driving voltage when the grid driving unit outputs a first driving voltage and a second riving voltage, wherein the second driving voltage is larger than the first driving voltage, and the third driving voltage is larger than the fourth driving voltage; and a first voltage difference and a second voltage difference mutually counteract, wherein the first voltage difference is voltage drop generated when the first driving voltage and the second driving voltage mutually convert on the pixel electrode, and the second voltage difference is the voltage drop generated when the third driving voltage and the fourth driving voltage mutually convert on the pixel electrode. By the invention, a flare phenomenon of a liquid crystal display is eliminated.
Description
Technical field
The present invention relates to lcd technology, refer to especially a kind of common electrode drive unit, display panels and liquid crystal indicator.
Background technology
In the display panels, there is stray capacitance C between the grid of thin film transistor (TFT) and the drain electrode
Gd, on pixel electrode as shown in Figure 1, the variation of signal is by stray capacitance C
GdThe coupling meeting produce a voltage difference delta V at pixel electrode
p, so that the identical positive and negative demonstration voltage of absolute value no longer is symmetry about public (common) electrode originally, having caused occurring different GTGs, therefore liquid crystal indicator can produce scintillation.
In the prior art, regulate the DC voltage of public electrode output, so that the slippage of voltage and the voltage difference delta V on the pixel electrode on the public electrode
pIdentical; Perhaps, for the Δ V on the liquid crystal panel
pInhomogeneity, provide different DC voltage to eliminate flicker to the different piece of liquid crystal panel.
There are the following problems for prior art: the DC voltage of adjusting public electrode is eliminated the process need of scintillation and is realized according to test result and calculating, and this process is too complicated.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of common electrode drive unit, display panels and liquid crystal indicator, solve in the prior art, regulate the process need of the DC voltage elimination scintillation of public electrode and realize according to result and calculating, and the too complicated defective of this process.
For solving the problems of the technologies described above, embodiments of the invention provide a kind of common electrode drive unit, be used to the public electrode in the display panels that driving voltage is provided, comprise pixel electrode in the described display panels, drive element of the grid, described common electrode drive unit comprises: be connected to the output unit between described drive element of the grid and the described public electrode, described output unit is used for when described drive element of the grid is exported the first driving voltage and the second driving voltage, corresponding output the 3rd driving voltage and 4 wheel driven move voltage respectively, described the second driving voltage is greater than described the first driving voltage, and described the 3rd driving voltage is greater than the moving voltage of described 4 wheel driven; The first voltage difference and second voltage are poor cancels out each other, wherein, described the first voltage difference is the pressure drop that described the first driving voltage and described the second driving voltage produce at described pixel electrode when mutually changing, the pressure drop that described second voltage is poor to be produced at described pixel electrode when mutually changing for described the 3rd driving voltage and the moving voltage of 4 wheel driven.
In the described common electrode drive unit, described output unit is specially phase inverter; The input end of described phase inverter is electrically connected with the output terminal of described drive element of the grid, is used for receiving described the first driving voltage or described the second driving voltage; The output terminal of described phase inverter is electrically connected with described public electrode, is used for exporting the moving voltage of described the 3rd driving voltage or described 4 wheel driven.
In the described common electrode drive unit, comprise in the described phase inverter: the first film transistor and the second thin film transistor (TFT); The transistorized grid of described the first film and drain electrode enter the device operating voltage by the high level termination of described phase inverter, the transistorized source electrode of described the first film is electrically connected with the drain electrode of described the second thin film transistor (TFT), and the transistorized source electrode of described the first film is as the output terminal of described phase inverter; The grid of described the second thin film transistor (TFT) is electrically connected with the output terminal of described drive element of the grid, and the source electrode of described the second thin film transistor (TFT) is electrically connected with the low level end of described drive element of the grid.
In the described common electrode drive unit, comprise in the described phase inverter: the first film transistor, the second thin film transistor (TFT) and the 3rd thin film transistor (TFT); The transistorized grid of described the first film and drain electrode enter the device operating voltage by the high level termination of described phase inverter, and the transistorized source electrode of described the first film is electrically connected with the grid of described the second thin film transistor (TFT); The drain electrode of described the second thin film transistor (TFT) is electrically connected with described device operating voltage, and the source electrode of described the second thin film transistor (TFT) is electrically connected mutually with the drain electrode of described the 3rd thin film transistor (TFT) and the output terminal of described phase inverter; The grid of described the 3rd thin film transistor (TFT) is electrically connected with the output terminal of described drive element of the grid, and the source electrode of described the 3rd thin film transistor (TFT) is electrically connected with the low level end of described drive element of the grid.
In the described common electrode drive unit, described the first voltage difference satisfies:
Wherein, Vgl is the first driving voltage, i.e. the low-potential voltage of drive element of the grid output, and Vgh is the second driving voltage, i.e. the high-potential voltage of drive element of the grid output, C
GdBe the stray capacitance between pixel electrode and the gate line, C
AllAll coupling capacitance sums for described pixel electrode.
In the described common electrode drive unit, the poor Δ V of described second voltage
InverterSatisfy:
Wherein, V
Common1Be the 3rd driving voltage, V
Common2Be the moving voltage of 4 wheel driven, C
StBe the memory capacitance between pixel electrode and the public electrode, C
AllAll coupling capacitance sums for described pixel electrode.
A kind of display panels comprises above-described common electrode drive unit.
A kind of liquid crystal indicator comprises above-described display panels.
The beneficial effect of technical scheme of the present invention is as follows: the anti-phase level of the output terminal output of phase inverter forms the Common pulse signal at the public electrode place, control the Common pulse signal at public electrode place by changing anti-phase level, so that Common pulse signal and signal are anti-phase and cancel each other at the pixel electrode place, offset the voltage difference that signal produces at the pixel electrode place, keep the voltage difference between pixel electrode and the public electrode to be in all the time steady state (SS), eliminated the scintillation of liquid crystal display.
Description of drawings
Fig. 1 represents the structural representation of display unit;
Fig. 2 represents the drive element of the grid of one embodiment of the invention+phase inverter inner structure schematic diagram;
Fig. 3 represents the Common pulse signal waveform figure corresponding with signal;
Fig. 4 represents the liquid crystal panel structure schematic diagram of liquid crystal display;
Fig. 5 represents the drive element of the grid of another embodiment of the present invention+phase inverter inner structure schematic diagram;
Fig. 6 represents the Common pulse signal waveform figure corresponding with a plurality of signals.
Embodiment
For making the technical problem to be solved in the present invention, technical scheme and advantage clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, there is memory capacitance C between pixel electrode and the public electrode
St, have stray capacitance C between the grid of thin film transistor (TFT) (ThinFilm Transistor, TFT) and the drain electrode
GdThere is capacitor C between source electrode line and the pixel electrode
Sp, C
AllFor the complex capacitance at pixel electrode place, by capacitor C
St, C
Gd, C
Sp, C
Lc, and other electric capacity compound actions that may exist form, and in Fig. 1, C
All=C
St+ C
Gd+ C
Sp+ C
Lc
In the process that gate line opens and closes, under the open mode to pixel switch output HIGH voltage Vgh (i.e. the second driving voltage), output LOW voltage Vgl under the closed condition (i.e. the first driving voltage), the signal Vgh of variation and Vgl produce the first voltage difference delta V at the pixel electrode place
p,
The embodiment of the invention provides a kind of common electrode drive unit, be used to the public electrode in the display panels that driving voltage is provided, comprise pixel electrode, drive element of the grid in the described display panels, as shown in Figure 2, described common electrode drive unit comprises:
Be connected to the output unit between described drive element of the grid and the described public electrode, described output unit is used for when described drive element of the grid is exported the first driving voltage and the second driving voltage, corresponding output the 3rd driving voltage and 4 wheel driven move voltage respectively, the second driving voltage is greater than the first driving voltage, and the 3rd driving voltage is greater than the moving voltage of 4 wheel driven;
The first voltage difference and second voltage are poor cancels out each other, wherein, described the first voltage difference is the pressure drop that described the first driving voltage and described the second driving voltage produce at described pixel electrode when mutually changing, the pressure drop that described second voltage is poor to be produced at described pixel electrode when mutually changing for described the 3rd driving voltage and the moving voltage of 4 wheel driven.
The technical scheme that provides is provided, the anti-phase level of the output terminal output of phase inverter forms the Common pulse signal at the public electrode place, control the Common pulse signal at public electrode place by changing anti-phase level, so that the voltage difference that the voltage difference that pulse signal produces at the pixel electrode place after pixel electrode being coupled when changing and signal produce at the pixel electrode place when changing is cancelled each other, offset the first voltage difference delta V that signal produces at the pixel electrode place
p, keep the voltage difference between pixel electrode and the public electrode to be in all the time steady state (SS), eliminated the scintillation of liquid crystal display.
Drive element of the grid specifically can be the capable driving of array base palte (Gate Driver on Array), and signal comprises the first driving voltage and the second driving voltage, and the Common pulse signal comprises the 3rd driving voltage and the moving voltage of 4 wheel driven.
In a preferred embodiment, as shown in Figure 2, output unit is specially phase inverter;
The input end of phase inverter is electrically connected with the output terminal Gout of drive element of the grid, is used for receiving described the first driving voltage or described the second driving voltage;
The output terminal of phase inverter is electrically connected with described public electrode, is used for exporting the moving voltage of described the 3rd driving voltage or described 4 wheel driven.
In a preferred embodiment, as shown in Figure 2, comprise in the phase inverter: the first film transistor T 1 and the second thin film transistor (TFT) T2;
The grid of described the first film transistor T 1 and drain electrode enter device operating voltage VDD by the high level termination of described phase inverter, the source electrode of described the first film transistor T 1 is electrically connected with the drain electrode of described the second thin film transistor (TFT) T2, and as the output terminal Vcom of described phase inverter;
The grid of described the second thin film transistor (TFT) T2 is electrically connected with the output terminal Gout of described drive element of the grid, and the source electrode of the second thin film transistor (TFT) T2 is electrically connected with the low level end VSS of described drive element of the grid.
The initial output of drive element of the grid the first driving voltage Vgl, because the first driving voltage Vgl is low level, this moment, the second thin film transistor (TFT) T2 was cut-off state, the high level device operating voltage VDD of phase inverter access makes 1 conducting of the first film transistor T, the corresponding output of output terminal Vcom this moment the 3rd driving voltage V
Common1When drive element of the grid output becomes the second driving voltage Vgh by the first driving voltage Vgl, because the second driving voltage Vgh is high level, so the second thin film transistor (TFT) T2 conducting, simultaneously, operating voltage VDD makes also conducting of the first film transistor T 1 during this time, at this moment, the output of output terminal Vcom is by the 3rd driving voltage V
Common1Become the moving voltage V of 4 wheel driven
Common2Same, when the output of drive element of the grid becomes the first driving voltage Vgl by the second driving voltage Vgh, corresponding, the output of output terminal Vcom is by the moving voltage V of 4 wheel driven
Common2Become the 3rd driving voltage V
Common1, the 3rd driving voltage V
Common1Greater than the moving voltage V of 4 wheel driven
Common2, the 3rd driving voltage V
Common1With the moving voltage V of 4 wheel driven
Common2Size be to be determined by the size of the first film transistor T 1, the second thin film transistor (TFT) T2 and device operating voltage VDD.
In a preferred embodiment, as shown in Figure 5, comprise in the phase inverter: the first film transistor M1, the second thin film transistor (TFT) M2 and the 3rd thin film transistor (TFT) M3;
The grid of described the first film transistor M1 and drain electrode enter the device operating voltage by the high level termination of described phase inverter, and the source electrode of described the first film transistor M1 is electrically connected with the grid of described the second thin film transistor (TFT) M2;
The drain electrode of described the second thin film transistor (TFT) M2 is electrically connected with described device operating voltage, and the source electrode of described the second thin film transistor (TFT) M2 is electrically connected mutually with the drain electrode of described the 3rd thin film transistor (TFT) M3 and the output terminal of described phase inverter;
The grid of described the 3rd thin film transistor (TFT) M3 is electrically connected with the output terminal Gout of described drive element of the grid, and the source electrode of the 3rd thin film transistor (TFT) M3 is electrically connected with the low level end VSS of described drive element of the grid.
The initial output of drive element of the grid the first driving voltage Vgl, because the first driving voltage Vgl is low level, therefore the 3rd thin film transistor (TFT) M3 is in cut-off state, the high level device operating voltage VDD of phase inverter access makes the first film transistor M1 and second conductings of thin film transistor (TFT) M2, and this moment, output terminal Vcom exported the 3rd driving voltage V
Common1When drive element of the grid output becomes the second driving voltage Vgh by the first driving voltage Vgl, because the second driving voltage Vgh is high level, so the second driving voltage Vgh makes the 3rd thin film transistor (TFT) M3 conducting, at this moment, the output of output terminal Vcom is by the 3rd driving voltage V
Common1Become the moving voltage V of 4 wheel driven
Common2, same, when the output of drive element of the grid becomes the first driving voltage Vgl by the second driving voltage Vgh, corresponding, the output of output terminal Vcom is by the moving voltage V of 4 wheel driven
Common2Become the 3rd driving voltage V
Common1, the 3rd driving voltage V
Common1Greater than the moving voltage of 4 wheel driven
Common2, the 3rd driving voltage V
Common1With the moving voltage V of 4 wheel driven
Common2Size be to be determined by the size of the first film transistor M1, the second thin film transistor (TFT) M2, the 3rd thin film transistor (TFT) M3 and device operating voltage VDD.
The annexation figure of gate driver circuit+inverter circuit and grid line and public electrode wire in the display panel as shown in Figure 4.Concrete, the output of gate driver circuit connects grid line G1, G2, the G3 of corresponding row ... Gn, the output of inverter circuit connects public electrode wire Vcom1, Vcom2, the Vcom3 of corresponding row ... VcomN.The equivalent circuit structure of the pixel cell of the display panel of Fig. 4 as shown in Figure 1.On the pixel electrode of every delegation, the signal sudden change is exchanged between the first driving voltage Vgl and the second driving voltage Vgh, and this interchange process is by stray capacitance C
GdCoupling, produce the first voltage difference at the pixel electrode place, simultaneously, common electrode drive unit (being phase inverter) output the 3rd driving voltage V
Common1With the moving voltage V of 4 wheel driven
Common2Between exchange, this interchange process is by memory capacitance C
StEffect, produce at the pixel electrode place equate with the first voltage difference absolute value, opposite polarity second voltage is poor, the first voltage difference can be cancelled each other at the pixel electrode place with second voltage is poor, realized the first voltage difference of every row pixel electrode is compensated in the situation that do not increase circuit chip (IC), kept the voltage difference between pixel electrode and the public electrode to be in all the time steady state (SS).
In a preferred embodiment, the first voltage difference satisfies:
Wherein, Vgl is the first driving voltage, i.e. the low-potential voltage of drive element of the grid output, and Vgh is the second driving voltage, i.e. the high-potential voltage of drive element of the grid output, C
GdBe the stray capacitance between pixel electrode and the gate line, C
AllAll coupling capacitance sums for described pixel electrode.
In a preferred embodiment, the poor Δ V of second voltage
InverterSatisfy:
Wherein, V
Common1Be the 3rd driving voltage, V
Common2Be the moving voltage of 4 wheel driven, C
StBe the memory capacitance between pixel electrode and the public electrode, C
AllAll coupling capacitance sums for described pixel electrode.
As Δ V
InverterWith Δ V
pWhen the pixel electrode place can cancel out each other, satisfy
According to this formula, high level Vgh and the low level Vgl of the signal of known drive element of the grid output, stray capacitance C
GdWith memory capacitance C
StSize, just can know the pressure reduction V that needs
Common1-V
Common2, regulate the device operating voltage VDD of the high level termination of phase inverter, and the size of the first film transistor and the second thin film transistor (TFT) just can obtain required the 3rd driving voltage V by Vcom output
Common1Perhaps 4 wheel driven moves voltage V
Common2, obtain Common pulse signal as shown in Figure 3.
In an application scenarios, above-mentioned situation is set the first driving voltage, the second driving voltage, the 3rd driving voltage and 4 wheel driven move voltage size separately, the first driving voltage is used for opening the thin film transistor (TFT) that is connected with gate line, corresponding, the 3rd driving voltage that this moment, the common electrode drive unit produced; The second driving voltage then is used for closing thin film transistor (TFT), the moving voltage of the 4 wheel driven that corresponding common electrode drive unit produces.
The first driving voltage end when drive element of the grid output namely, when transforming to the second driving voltage from the first driving voltage, has produced the first voltage difference at pixel electrode when the first driving voltage and the second driving voltage are changed mutually
The 3rd driving voltage should be exported in the common electrode drive unit when drive element of the grid is exported the first driving voltage, when drive element of the grid is exported the second driving voltage, then should export the moving voltage of 4 wheel driven.When the first driving voltage transformed to the second driving voltage, the signal of common electrode drive unit output also transformed to the moving voltage of 4 wheel driven from the 3rd driving voltage simultaneously.
It is poor that the moving voltage of the 3rd driving voltage and 4 wheel driven has produced second voltage at pixel electrode when changing mutually
The first voltage difference
In the effect that pixel electrode occurs, poor with second voltage
Can cancel each other in the effect that pixel electrode occurs, keep the voltage difference between pixel electrode and the public electrode to be in all the time steady state (SS).
In a preferred embodiment, the size of each thin film transistor (TFT) in the phase inverter should satisfy condition: so that the poor absolute value of the first voltage difference and second voltage equates.
In a preferred embodiment, the size of device operating voltage should satisfy condition: so that the poor absolute value of the first voltage difference and second voltage equates.
Because the size of common electrode drive unit internal components and the V that provides
Common1, V
Common2Can satisfy condition
Therefore, second voltage is poor has offset the effect herein of the first voltage difference fully on pixel electrode.
The sequential chart of the output of gate driver circuit among Fig. 4 and phase inverter as shown in Figure 6, output Vcom1, the Vcom2 of phase inverter, Vcom3 ... output G1, the G2 of the gate driver circuit of VcomN and corresponding row, G3 ... Gn is mutually corresponding.Common pulse signal VcomN is following the variation of signal Gn and is changing, when the first voltage difference occurring each time at the pixel electrode place, and the poor Δ V of the second voltage of Common pulse signal genration
InverterAppear at simultaneously the pixel electrode place and offset the first voltage difference delta V
p
Because the time point that each frame signal occurs is different, therefore the time point of the first voltage difference to occur also be different at the pixel electrode place, therefore the Common pulse signal should occur on the time point that the first voltage difference occurs in real time, so that the signal at this pixel electrode place and Common pulse signal change the effect at pixel electrode place is cancelled out each other, keep the voltage difference between pixel electrode and the public electrode to be in all the time steady state (SS).
Adopted the technology of drive element of the grid+phase inverter, with the anti-phase Common pulse signal of signal to the first voltage difference delta V on the pixel electrode
pCompensate, because the Common pulse signal that produces has the identical cycle with signal, therefore only need to input a device operating voltage for phase inverter, the device operating voltage be by panel exterior PC B circuit board provide and do not need extra integrated circuit (IC) chip.
The embodiment of the invention provides a kind of display panels, and as shown in Figure 4, display panels comprises the described common electrode drive of above embodiment unit.
The embodiment of the invention also provides a kind of liquid crystal indicator that comprises above-mentioned display panels, this liquid crystal indicator can for: LCD TV, liquid crystal display, digital album (digital photo frame), mobile phone, panel computer etc. have product or the parts of Presentation Function.
Adopt this programme advantage afterwards to be: the circuit that has adopted drive element of the grid+phase inverter, the Common pulse signal anti-phase with signal compensates the first voltage difference on the pixel electrode, owing to adopting the cycle of signal control Common pulse signal, therefore the Common pulse signal is consistent with the signal cycle, only need to be for phase inverter increase a device operating voltage again, the device operating voltage is provided by the signal of panel exterior PC B circuit board and does not need extra integrated circuit (IC) chip.The C at the pixel electrode place on the panel different rows
GdAnd C
StBe fixed size, because the impact that postpones, the Vgh of different rows can be slightly variant, causes the first voltage difference possibility difference at the pixel electrode place of different rows, so need the voltage of compensation different, need to adjust accordingly V
Common1And V
Common2, by the size of the thin film transistor (TFT) in the phase inverter on the different rows is set, the VDD-VSS dividing potential drop is formed different Vcom output, make satisfied to the first different voltage differences
Corresponding compensation, keep the voltage difference between pixel electrode and the public electrode to be in all the time steady state (SS), thereby eliminate scintillation.
The above is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (8)
1. a common electrode drive unit is used to the public electrode in the display panels that driving voltage is provided, and comprises pixel electrode, drive element of the grid in the described display panels, it is characterized in that, described common electrode drive unit comprises:
Be connected to the output unit between described drive element of the grid and the described public electrode, described output unit is used for when described drive element of the grid is exported the first driving voltage and the second driving voltage, corresponding output the 3rd driving voltage and 4 wheel driven move voltage respectively, described the second driving voltage is greater than described the first driving voltage, and described the 3rd driving voltage is greater than the moving voltage of described 4 wheel driven;
The first voltage difference and second voltage are poor cancels out each other, wherein, described the first voltage difference is the pressure drop that described the first driving voltage and described the second driving voltage produce at described pixel electrode when mutually changing, the pressure drop that described second voltage is poor to be produced at described pixel electrode when mutually changing for described the 3rd driving voltage and the moving voltage of 4 wheel driven.
2. common electrode drive according to claim 1 unit is characterized in that, described output unit is specially phase inverter;
The input end of described phase inverter is electrically connected with the output terminal of described drive element of the grid, is used for receiving described the first driving voltage or described the second driving voltage;
The output terminal of described phase inverter is electrically connected with described public electrode, is used for exporting the moving voltage of described the 3rd driving voltage or described 4 wheel driven.
3. common electrode drive according to claim 2 unit is characterized in that, comprises in the described phase inverter: the first film transistor and the second thin film transistor (TFT);
The transistorized grid of described the first film and drain electrode enter the device operating voltage by the high level termination of described phase inverter, the transistorized source electrode of described the first film is electrically connected with the drain electrode of described the second thin film transistor (TFT), and the transistorized source electrode of described the first film is as the output terminal of described phase inverter;
The grid of described the second thin film transistor (TFT) is electrically connected with the output terminal of described drive element of the grid, and the source electrode of described the second thin film transistor (TFT) is electrically connected with the low level end of described drive element of the grid.
4. common electrode drive according to claim 2 unit is characterized in that, comprises in the described phase inverter: the first film transistor, the second thin film transistor (TFT) and the 3rd thin film transistor (TFT);
The transistorized grid of described the first film and drain electrode enter the device operating voltage by the high level termination of described phase inverter, and the transistorized source electrode of described the first film is electrically connected with the grid of described the second thin film transistor (TFT);
The drain electrode of described the second thin film transistor (TFT) is electrically connected with described device operating voltage, and the source electrode of described the second thin film transistor (TFT) is electrically connected mutually with the drain electrode of described the 3rd thin film transistor (TFT) and the output terminal of described phase inverter;
The grid of described the 3rd thin film transistor (TFT) is electrically connected with the output terminal of described drive element of the grid, and the source electrode of described the 3rd thin film transistor (TFT) is electrically connected with the low level end of described drive element of the grid.
5. common electrode drive according to claim 1 unit is characterized in that described the first voltage difference delta V
pSatisfy:
Wherein, Vgl is the first driving voltage, i.e. the low-potential voltage of drive element of the grid output, and Vgh is the second driving voltage, i.e. the high-potential voltage of drive element of the grid output, C
GdBe the stray capacitance between pixel electrode and the gate line, C
AllAll coupling capacitance sums for described pixel electrode.
6. common electrode drive according to claim 1 unit is characterized in that the poor Δ V of described second voltage
InverterSatisfy:
7. a display panels is characterized in that, comprises each described common electrode drive unit of claim 1 ~ 6.
8. a liquid crystal indicator comprises display panels claimed in claim 7.
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| CN103226933A (en) * | 2013-03-18 | 2013-07-31 | 京东方科技集团股份有限公司 | Display driving circuit, display unit and driving method thereof |
| CN103293813A (en) * | 2013-05-29 | 2013-09-11 | 北京京东方光电科技有限公司 | Pixel driving circuit, driving method thereof, array substrate and display device |
| CN104851385A (en) * | 2015-06-08 | 2015-08-19 | 京东方科技集团股份有限公司 | Inverter, voltage compensating circuit and display circuit |
| CN107039011A (en) * | 2017-05-10 | 2017-08-11 | 京东方科技集团股份有限公司 | Common electric voltage compensating unit, display panel and display device |
| CN108389558A (en) * | 2018-03-23 | 2018-08-10 | 京东方科技集团股份有限公司 | Voltage applying circuit, display device and the method for applying public voltage signal |
| CN109116641A (en) * | 2018-10-22 | 2019-01-01 | 重庆惠科金渝光电科技有限公司 | Display panel and display device |
| WO2019037513A1 (en) * | 2017-08-25 | 2019-02-28 | 京东方科技集团股份有限公司 | Display substrate and manufacturing method therefor, display panel and display device |
| CN109445147A (en) * | 2019-01-11 | 2019-03-08 | 惠科股份有限公司 | Adjusting method of pixel structure and pixel voltage value adjusting system |
| CN109613777A (en) * | 2019-01-30 | 2019-04-12 | 惠科股份有限公司 | Display panel and display device |
| CN109920391A (en) * | 2019-05-05 | 2019-06-21 | 京东方科技集团股份有限公司 | Pixel circuit, array substrate, display panel, display equipment |
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Application publication date: 20130306 |