CN201984788U - Scanning electrode drive system, liquid crystal display panel and liquid crystal display - Google Patents
Scanning electrode drive system, liquid crystal display panel and liquid crystal display Download PDFInfo
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- CN201984788U CN201984788U CN2011200985043U CN201120098504U CN201984788U CN 201984788 U CN201984788 U CN 201984788U CN 2011200985043 U CN2011200985043 U CN 2011200985043U CN 201120098504 U CN201120098504 U CN 201120098504U CN 201984788 U CN201984788 U CN 201984788U
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Abstract
The utility model discloses a scanning electrode drive system, a liquid crystal display panel and a liquid crystal display, wherein the system comprises a boosting unit, a dropping unit and a grid drive unit, wherein the boosting unit is used for boosting the work voltage of a circuit so as to acquire a grid start voltage; the dropping unit is used for lowering the work voltage of the circuit so as to acquire a grid close voltage, and the grid close voltage comprises a first grid close voltage and a second grid close voltage; and the grid drive unit is used for controlling the output time sequence of the grid start voltage, the first grid close voltage and the second grid close voltage. By adopting the scheme,, the feed through voltage can be eliminated so that the flickering of a display image of the display is avoided to improve the user experience.
Description
Technical field
The utility model relates to appliance field, in particular to a kind of scan electrode drive system, display panels and LCD.
Background technology
Along with the increasingly extensive application of liquid crystal display, the demand of high performance-price ratio product is also strengthened day by day, how to improve display quality, reduce cost, enhancing productivity just becomes the problem that researcher need be paid close attention to and solve.
Existing liquid crystal panel is divided into two kinds of frameworks: a kind ofly finish by gate line gate cabling for memory capacitance; Another kind is finished by common reference voltage (common) cabling for memory capacitance.Fig. 1 is the structural representation according to the liquid crystal molecule of the display panels of correlation technique, as shown in Figure 1, Clc is a liquid crystal capacitance, and Cs is a storage capacitors, Cgd is the stray capacitance between own grid of TFT (gate) and the drain electrode (drain), and the end of storage capacitors Cs is connected on the gate line.
The nowadays liquid crystal display of Shi Yonging, gate drivers substantially all is to adopt the two-way driven, be that gate driver voltage has only two-way, one road grid opens voltage (VON) and one road grid is closed voltage (VOFF1), because this display panels adopts thin film transistor (TFT) TFT as control element, between the grid of thin film transistor (TFT) and drain electrode, stray capacitance is arranged, stray capacitance very easily is subjected to the influence of gate drive voltage, and cause the change of current potential on the electric capacity, thereby have influence on the variation of show electrode voltage by capacitive coupling, the variation of this voltage has inevitably produced feedback and has worn voltage, therefore cause the positive-negative polarity gray scale voltage asymmetric, make that the GTG quality can be poor, influence image quality to a great extent.
Fig. 2 is the second order driving sequential chart according to display panels shown in Figure 1.Drive waveforms figure as shown in Figure 2, in the process that each grid gate opens successively according to the pulse high level time corresponding, though it is simpler on driving voltage that second order drives, but it can produce feedback inevitably and wear voltage, so can cause film flicker, need regulate common reference voltage VCOM by external debug equipment and improve flicker level, can increase cost so inevitably.
At above-mentioned prior art wear voltage because the two-way Voltag driving circuit produces feedback, cause the positive-negative polarity gray scale voltage asymmetric, make the display frame flicker, influence the problem of display effect, effective solution is not proposed at present as yet.
The utility model content
Fundamental purpose of the present utility model is to provide a kind of scan electrode drive system, display panels and LCD, because producing feedback, the two-way Voltag driving circuit wears voltage with what solve prior art, cause the positive-negative polarity gray scale voltage asymmetric, make display frame glimmer, influence the problem of display effect.
To achieve these goals, according to one side of the present utility model, provide a kind of scan electrode drive system.
Comprise according to scan electrode drive system of the present utility model: boosting unit is used for to the circuit voltage processing of boosting, to obtain the grid cut-in voltage; Pressure unit is used for that circuit voltage is carried out step-down and handles, and closes voltage to obtain grid, and grid is closed voltage and comprised that first grid is closed voltage and second grid cuts out voltage; Drive element of the grid is used to control grid cut-in voltage, first grid and closes the output timing that voltage and second grid are closed voltage.
To achieve these goals, according to another aspect of the present utility model, provide a kind of scan electrode driving method.
Comprise according to scan electrode driving method of the present utility model: to the circuit voltage processing of boosting, to obtain the grid cut-in voltage; Circuit voltage is carried out step-down handle, close voltage to obtain grid, grid is closed voltage and is comprised that first grid is closed voltage and second grid cuts out voltage; Control grid cut-in voltage, first grid are closed the output timing that voltage and second grid are closed voltage.
To achieve these goals, provide a kind of display panels more on the one hand according to of the present utility model, this LCD comprises above-mentioned any one scan electrode drive system.
To achieve these goals, provide a kind of LCD more on the one hand according to of the present utility model, this LCD comprises above-mentioned display panels.
By the utility model, adopt boosting unit, be used for to the circuit voltage processing of boosting, to obtain the grid cut-in voltage; Pressure unit is used for that circuit voltage is carried out step-down and handles, and closes voltage to obtain grid, and grid is closed voltage and comprised that first grid is closed voltage and second grid cuts out voltage; Drive element of the grid, be used to control grid cut-in voltage, first grid and close the output timing that voltage and second grid are closed voltage, what solved prior art wears voltage because the two-way Voltag driving circuit produces feedback, cause the positive-negative polarity gray scale voltage asymmetric, make display frame glimmer, influence the problem of display effect, reached to eliminate to present and worn voltage, make and avoid display display frame flicker, improved user experience effect.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation according to the liquid crystal molecule of the display panels of correlation technique;
Fig. 2 is the second order driving sequential chart according to display panels shown in Figure 1;
Fig. 3 is the structural representation according to the LCD of the utility model embodiment;
Fig. 4 is the structural representation according to the scan electrode drive system of LCD shown in Figure 3;
Fig. 5 is the detailed structure synoptic diagram according to the scan electrode drive system of LCD shown in Figure 3;
Fig. 6 is the electrical block diagram according to the scan electrode drive system of LCD shown in Figure 3;
Fig. 7 is the schematic diagram according to the scan electrode drive system of LCD shown in Figure 3;
Fig. 8 is three rank drive waveforms figure according to LCD shown in Figure 3;
Fig. 9 is the three rank driving sequential chart according to LCD shown in Figure 3; And
Figure 10 is the process flow diagram according to the scan electrode driving method of the utility model embodiment.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
The utility model provides a kind of scan electrode drive system.Fig. 3 is the structural representation according to the LCD of the utility model embodiment; Fig. 4 is the structural representation according to the scan electrode drive system of LCD shown in Figure 3; Fig. 6 is the electrical block diagram according to the scan electrode drive system of LCD shown in Figure 3.
Shown in Fig. 3 and 4, this system comprises: scanning electrode drive and gate drivers, and wherein, scanning electrode drive comprises: boosting unit 1 is used for to the circuit voltage processing of boosting, to obtain the grid cut-in voltage; Pressure unit 2 is used for that circuit voltage is carried out step-down and handles, and closes voltage to obtain grid, and grid is closed voltage and comprised that first grid is closed voltage and second grid cuts out voltage; And gate drivers comprises drive element of the grid 3, is used to control grid cut-in voltage, first grid and closes the output timing that voltage and second grid are closed voltage.
The utility model is by adopting gate driver circuit three tunnel driven, promptly one road grid cut-in voltage (positive polarity voltage), two-way grid are closed voltage (reverse voltage), with respect to two road traditional voltage driving modes, increased by one tunnel negative polarity driving voltage, the feedback that the circuit of two-way reverse voltage correspondence produces is worn voltage and can be cancelled out each other, therefore can not produce the asymmetric phenomenon of positive-negative polarity gray scale voltage, so need not to debug the purpose that common reference voltage also can be realized high image quality.Such scheme has improved the application circuit of liquid crystal panel demonstration GTG quality, common reference voltage can be regulated and the effect of high image quality can be realized, saved and used external unit to regulate the operation of common reference voltage, and saved the periphery circuit design of common reference voltage correspondence, save cost to a great extent, improved production efficiency.
Fig. 5 is the detailed structure synoptic diagram according to the scan electrode drive system of LCD shown in Figure 3.As shown in Figure 5, boosting unit 1 among the utility model Fig. 4 can comprise: one-level positive electrode charhing unit 11, the circuit voltage liter is doubled, to obtain the first grid cut-in voltage, and secondary positive electrode charhing unit 13, be connected with one-level positive electrode charhing unit 11, first grid cut-in voltage liter is doubled, to obtain the grid cut-in voltage; Pressure unit 2 among the utility model Fig. 4 comprises: one-level negative electrode discharge cell 21, reduce by one times with circuit voltage, to obtain the one-level negative voltage; Secondary negative electrode discharge cell 23 is connected with one-level negative electrode discharge cell, and the one-level negative voltage is reduced by one times, closes voltage to obtain grid.
As shown in Figure 4 and Figure 5, the utility model system also comprises control module 4, the grid cut-in voltage and the grid that are used to regulate output are closed voltage, these control module 4 concrete can comprising: positive polarity voltage control module 41, be used to obtain the grid cut-in voltage, and the grid cut-in voltage is regulated; And reverse voltage control module 42, being used for that the grid that gets access to is closed voltage and regulating, first grid is closed voltage and second grid cuts out voltage to obtain.
To sum up shown in the Figure 4 and 5, first grid in the above-mentioned steps of the present utility model is closed voltage and second grid and is closed voltage and can directly generate by pressure unit 2, control its output timing by drive element of the grid then, in addition, can control and regulate the grid that pressure unit 2 generates according to the time by reverse voltage control module 41 and close voltage, thereby the output first grid closes voltage and second grid cuts out voltage.
As shown in Figure 5, the system in the utility model the foregoing description can also comprise: the first filter capacitor C5, an end are connected on the node of the path between positive polarity voltage control module 41 and the drive element of the grid 3, other end ground connection; The second filter capacitor C6, an end are connected on the node of first path between reverse voltage control module 42 and the drive element of the grid 3, other end ground connection, and first path is used to transmit first grid and closes voltage; The 3rd filter capacitor C7, an end are connected on the node of the alternate path between reverse voltage control module 42 and the drive element of the grid 3, other end ground connection, and alternate path is used to transmit second grid and closes voltage.Above-mentioned three filter capacitors are used to reduce ripple voltage, have improved the stability of voltage.
Preferably, the utility model can comprise timing control unit by drive element of the grid, be used to be provided with high level H and the low level L of the first pulse signal STV1, the second pulse signal STV2 and enable signal OE, wherein, work as STV1=H, STV2=H, during OE=L, the grid voltage that drive element of the grid is controlled the capable gate line of N-1 is grid cut-in voltage Von; Work as STV1=H, STV2=L, during OE=H, the grid voltage that drive element of the grid is controlled the capable gate line of N-1 is that first grid is closed voltage VOFF1, and first grid is closed voltage VOFF1 is saved to storage capacitors Cs; Work as STV1=H, STV2=L, during OE=L, the grid voltage that drive element of the grid is controlled the capable gate line of N-1 is that second grid cuts out voltage VOFF2, the grid voltage that drive element of the grid is controlled the capable gate line of N is grid cut-in voltage Von, and second grid cuts out voltage VOFF2 and grid cut-in voltage Von is saved to storage capacitors Cs; Work as STV1=L, STV2=L, during OE=H, the grid voltage that drive element of the grid is controlled the capable gate line of N-1 is that first grid is closed voltage VOFF1, retract voltage Ve=VOFF1-VOFF2 to obtain, the grid voltage that drive element of the grid is controlled the capable gate line of N is that second grid cuts out voltage VOFF2, storage capacitors Cs preserves and retracts voltage Ve, this retracts voltage and can cause the voltage of Cs show electrode end to change, the magnitude of voltage that changes just equals feedback and wears voltage, can calculate feedback according to principle of charge conservation and wear voltage Δ V=Ve*Cs/ (Cgd+Clc+Cs), therefore solve because the problem of the display effect difference that voltage causes is worn in feedback.
Preferably, scanning electrode drive of the present utility model can be integrated into a circuit unit with gate drivers, be that boosting unit 1 and pressure unit 2 in the utility model can be built in drive element of the grid, but their logic functions each other are independently.
Fig. 7 is the schematic diagram according to the scan electrode drive system of LCD shown in Figure 3; Fig. 8 is three rank drive waveforms figure according to LCD shown in Figure 3.
Concrete, with regard to being described in detail as follows of the utility model embodiment:
Shown in Fig. 4-6, the utility model utilizes common diode and triode device, by simple rectification circuit design, produces the needed three rank driving voltages of gate drivers easily, for second order drives, increased by one road grid and closed voltage VOFF2.In conjunction with as shown in Figure 7 systematic schematic diagram and drive waveforms figure shown in Figure 8 as can be known, open or close in a flash at grid (gate) voltage of gate line, the variation of voltage is the fiercest, nearly 30 volts to 40 volts.When the Gate cabling is opened, can produce a feedback that makes progress and wear voltage and affact on the show electrode.Because the cause that the gate cabling is opened, the source of source electrode line (source) electrode can charge to show electrode, wear voltage even can produce bigger feedback, but the source electrode can be added to correct voltage on the show electrode still, so that voltage is worn in feedback is little to the show electrode voltage influence.When the gate cabling is closed, can produce a pressure drop that voltage is downward equally, there are 30 to 40 volts approximately, but the source electrode no longer charges to show electrode, voltage drop just can affact on the show electrode by the Cgd stray capacitance, cause show electrode that the pressure drop of a gded through is arranged, thereby can influence the gray-level characteristic of image quality.And the gdedthrough voltage of this gded through voltage when opening unlike the gate cabling, only influence gray-level characteristic in moment, because source drive this moment (source driver) no longer discharges and recharges show electrode, therefore the voltage that (feed through) voltage drop can influence show electrode is always worn in feedback, after when gate driving (gate driver) cabling voltage is next time opened again, so this gded through voltage is for the influence of the GTG of display frame, human eye be can be clear and definite the existence of feeling it.Thus, find out from the oscillogram that three rank shown in Figure 8 drive, the gate driving voltage produces the grid cut-in voltage, first grid closes voltage and second grid cuts out three kinds of different voltages of voltage, when gate driving (gate driver) when closing, can move voltage to minimum voltage, closing voltage and second grid by first grid closes voltage and is implemented in after the gate driver cabling of next bar is also closed by the time, voltage is retracted, (feed through) voltage is worn in the feedback that Cgd that voltage can compensate next bar line produces that retracts of this moment again.That is to say, when each bar gatedriver cabling is closed, via the feed through voltage that Cgd produced, be when voltage being retracted by a last cabling, promptly compensate via feed through voltage that Cs produced, the storage first grid is closed the variable quantity that voltage and second grid are closed voltage in the CS electric capacity.As above principle analysis in conjunction with principle of charge conservation, can calculate the voltage that retracts as can be known:
(VON-VOFF2) * Cgd/ (Cgd+Clc+Cs)=(VOFF1-VOFF2) * Cs/ (Cgd+Clc+Cs), make and retract voltage Ve=VOFF1-VOFF2=(VON-VOFF2) * Cgd/ (Cs-Cgd), according to principle of charge conservation, magnitude of voltage Δ V=Ve*Cs/ (Cgd+Clc+Cs) is worn in feedback as can be known.Adopt above-mentioned three rank drive schemes, can very accurately adjust of the influence of feed through voltage for show electrode,
Fig. 9 is the three rank driving sequential chart according to LCD shown in Figure 3.Three rank driving voltage timing diagrams as shown in Figure 9, work as STV1=H, STV2=H is during OE=L, the capable gate cabling of N-1 grid corresponds to VGH, work as STV1=H, STV2=L is during OE=H, N-1 is capable, and the gate cabling becomes VOFF1, work as STV1=H, STV2=L is during OE=L, the capable gate cabling of N-1 grid voltage is VOFF2, at this moment, the capable gate cabling of N grid voltage is VGH, keep the OE high level period time after, when OE is become low level the time by high level, the gate drive voltage of the capable correspondence of N becomes VOFF1 by VGH, because the variation of Cgd electric capacity gate terminal voltage causes certain feed through voltage.But this moment, for the capable gate cabling of N-1, grid voltage becomes VOFF1 by VOFF2, the voltage of the Cs memory capacitance correspondence of the capable correspondence of N-1 this moment can change, in conjunction with top principle analysis as can be known, the voltage variety that the variation of the capable grid voltage of N-1 causes Cs electric capacity just waits the variable quantity of the capable grid voltage of N to Cgd voltage, STV1 wherein, and the frequency of STV2 and OE, high-low level dutycycle can be regulated.
Utility model provides a kind of scan electrode driving method.Figure 10 is the process flow diagram according to the scan electrode driving method of the utility model embodiment.As shown in figure 10, this method comprises the steps:
Step S102 is to the circuit voltage processing of boosting, to obtain the grid cut-in voltage.This step can realize by the boosting unit among Fig. 31.
Step S104 carries out step-down to circuit voltage and handles, and closes voltage to obtain grid, and grid is closed voltage and comprised that first grid is closed voltage and second grid cuts out voltage.This step can realize by the pressure unit among the utility model Fig. 32.
Step S106, control grid cut-in voltage, first grid close the output timing that voltage and second grid are closed voltage.Above-mentioned steps can realize by the drive element of the grid among the utility model Fig. 33.
The utility model is by adopting gate driver circuit three tunnel driven, promptly one road grid cut-in voltage (positive polarity voltage), two-way grid are closed voltage (reverse voltage), with respect to two road traditional voltage driving modes, increased by one tunnel negative polarity driving voltage, the feedback that the circuit of two-way reverse voltage correspondence produces is worn voltage and can be cancelled out each other, therefore can not produce the asymmetric phenomenon of positive-negative polarity gray scale voltage, so need not to debug the purpose that common reference voltage also can be realized high image quality.Such scheme has improved the application circuit of liquid crystal panel demonstration GTG quality, common reference voltage can be regulated and the effect of high image quality can be realized, saved and used external unit to regulate the operation of common reference voltage, and saved the periphery circuit design of common reference voltage correspondence, save cost to a great extent, improved production efficiency.
In the utility model the foregoing description, circuit voltage is carried out step-down to be handled, close voltage to obtain grid, grid is closed voltage and is comprised that first grid closes voltage and second grid and close the step of voltage and can comprise: by one-level negative electrode discharge cell 21 circuit voltage is reduced by one times, to obtain the one-level negative voltage; Receive this one-level negative voltage by secondary negative electrode discharge cell 23, and this one-level negative voltage is reduced by one times again, close voltage to obtain grid; The grid that gets access to is closed voltage regulate, first grid is closed voltage and second grid cuts out voltage to obtain.
Preferably, can be by high level H and the low level L that the first pulse signal STV1, the second pulse signal STV2 and enable signal OE are set, control grid cut-in voltage, first grid and close the output timing that voltage and second grid are closed voltage, wherein, work as STV1=H, STV2=H is during OE=L, open the capable gate line of N-1, and the grid voltage of controlling the capable gate line of N-1 is grid cut-in voltage Von; Work as STV1=H, STV2=L during OE=H, closes the capable gate line of N-1, and the grid voltage of controlling the capable gate line of N-1 is that first grid is closed voltage VOFF1, and first grid is closed voltage VOFF1 is saved to storage capacitors Cs; Work as STV1=H, STV2=L, during OE=L, the grid voltage that drive element of the grid is controlled the capable gate line of N-1 is that second grid cuts out voltage VOFF2, the grid voltage that drive element of the grid is controlled the capable gate line of N is grid cut-in voltage Von, and second grid cuts out voltage VOFF2 and grid cut-in voltage Von is saved to storage capacitors Cs; Work as STV1=L, STV2=L, during OE=H, the grid voltage that drive element of the grid is controlled the capable gate line of N-1 is that first grid is closed voltage VOFF1, retract voltage Ve=VOFF1-VOFF2 to obtain, the grid voltage that drive element of the grid is controlled the capable gate line of N is that second grid cuts out voltage VOFF2, storage capacitors Cs preserves and retracts voltage Ve, this retracts voltage and can cause the voltage of Cs show electrode end to change, the magnitude of voltage that changes just equals feedback and wears voltage, can calculate feedback according to principle of charge conservation and wear voltage Δ V=Ve*Cs/ (Cgd+Clc+Cs), therefore solve because the problem of the display effect difference that voltage causes is worn in feedback.
The above-mentioned implementation method of the utility model, concrete is under the situation of VIN at input voltage, behind one-level positive polarity booster circuit, sequential control C1 by SW discharges and recharges, and voltage can be raised to two times vin, through secondary positive polarity booster circuit, by discharging and recharging of control C2, voltage can be raised to three times VIN, by the adjusting by a small margin of positive polarity control circuit, just can reach the output voltage values VGH that needs.In like manner, by one-level negative polarity reduction voltage circuit, control C3 discharges and recharges, can make the VIN of voltage output negative pole, by secondary negative polarity circuit, control C4 discharges and recharges, can make VIN anti-phase, by the adjusting by a small margin of negative polarity control circuit, just can export VOFF1 and VOFF2 again.Because VGH, VOFF1, VOFF2 are higher to the stability requirement of voltage, so increase C5, C6, C7 reach the effect that reduces voltage ripple.By scheme of the present utility model, can accurately adjust the pressure drop that feed through voltage causes, drive with respect to second order, needn't use external unit debugging common reference, therefore can simplify the design of common reference circuit, also can save the input of commissioning device, save very big man power and material.
The utility model provides a kind of display panels, this display panels comprises the embodiment of above-mentioned any one scan electrode drive system, the utility model also provides a kind of LCD, this LCD comprises above-mentioned display panels, this liquid crystal display displays better effects if, the user experience sense is higher.
From above embodiment described, as can be seen, the utility model has been realized following technique effect: the utility model had been realized the more convenient image quality that improves liquid crystal panel more simply, has reduced cost, has improved user's visual experience.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present utility model or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the memory storage and carry out by calculation element, perhaps they are made into a plurality of integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the utility model is not restricted to any specific hardware and software combination.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (9)
1. a scan electrode drive system is characterized in that, comprising:
Boosting unit is used for to the circuit voltage processing of boosting, to obtain the grid cut-in voltage;
Pressure unit is used for that described circuit voltage is carried out step-down and handles, and closes voltage to obtain grid, and described grid is closed voltage and comprised that first grid is closed voltage and second grid cuts out voltage;
Drive element of the grid is used to control described grid cut-in voltage, described first grid and closes the output timing that voltage and described second grid are closed voltage.
2. system according to claim 1 is characterized in that,
Described boosting unit comprises:
One-level positive electrode charhing unit doubles described circuit voltage liter, to obtain the first grid cut-in voltage;
Secondary positive electrode charhing unit is connected with described one-level positive electrode charhing unit, described first grid cut-in voltage liter is doubled, to obtain described grid cut-in voltage;
Described pressure unit comprises:
One-level negative electrode discharge cell reduces by one times with described circuit voltage, to obtain the one-level negative voltage;
Secondary negative electrode discharge cell is connected with described one-level negative electrode discharge cell, and described one-level negative voltage is reduced by one times, closes voltage to obtain described grid.
3. system according to claim 2 is characterized in that, described system also comprises: control module is used to obtain and regulates described grid cut-in voltage and described grid is closed voltage.
4. system according to claim 3 is characterized in that, described control module comprises:
The positive polarity voltage control module is used to obtain described grid cut-in voltage, and described grid cut-in voltage is regulated;
The reverse voltage control module is used for that the described grid that gets access to is closed voltage and regulates, and described first grid is closed voltage and described second grid cuts out voltage to obtain.
5. system according to claim 4 is characterized in that, described system also comprises:
First filter capacitor, an end are connected on the node of the path between described positive polarity voltage control module and the described drive element of the grid, other end ground connection;
Second filter capacitor, an end are connected on the node of first path between described reverse voltage control module and the described drive element of the grid, other end ground connection, and described first path is used to transmit described first grid and closes voltage;
The 3rd filter capacitor, an end are connected on the node of the alternate path between described reverse voltage control module and the described drive element of the grid, other end ground connection, and described alternate path is used to transmit described second grid and closes voltage.
6. according to each described system among the claim 1-5, it is characterized in that described drive element of the grid comprises timing control unit, described timing control unit is used to be provided with high level H and the low level L of the first pulse signal STV1, the second pulse signal STV2 and enable signal OE, wherein
Work as STV1=H, STV2=H, during OE=L, the grid voltage that described drive element of the grid is controlled the capable gate line of N-1 is grid cut-in voltage Von;
Work as STV1=H, STV2=L, during OE=H, the grid voltage that described drive element of the grid is controlled the capable gate line of described N-1 is that described first grid is closed voltage VOFF1, and described first grid is closed voltage VOFF1 is saved to storage capacitors Cs;
Work as STV1=H, STV2=L, during OE=L, the grid voltage that described drive element of the grid is controlled the capable gate line of described N-1 is that described second grid cuts out voltage VOFF2, the grid voltage that described drive element of the grid is controlled the capable gate line of N is described grid cut-in voltage Von, and described second grid cuts out voltage VOFF2 and grid cut-in voltage Von is saved to storage capacitors Cs;
Work as STV1=L, STV2=L, during OE=H, the grid voltage that described drive element of the grid is controlled the capable gate line of described N-1 is that described first grid is closed voltage VOFF1, retract voltage Ve=VOFF1-VOFF2 to obtain, simultaneously, the grid voltage that described drive element of the grid is controlled the capable gate line of described N is that second grid cuts out voltage VOFF2, described storage capacitors Cs preserves and retracts voltage Ve, compensates feedback and wears voltage according to the described voltage that retracts.
7. system according to claim 6 is characterized in that, described boosting unit and described pressure unit are built in described drive element of the grid.
8. a display panels is characterized in that, comprises any described scan electrode drive system among the claim 1-7.
9. a LCD is characterized in that, comprises the display panels of claim 8.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102737590A (en) * | 2011-04-06 | 2012-10-17 | 青岛海信电器股份有限公司 | Scanning electrode driving method and system and liquid crystal display |
| CN103176318A (en) * | 2011-12-20 | 2013-06-26 | 上海天马微电子有限公司 | Thin film transistor array panel and liquid crystal display (LCD) device |
| WO2015096210A1 (en) * | 2013-12-26 | 2015-07-02 | 深圳市华星光电技术有限公司 | Touch liquid crystal display (lcd) array substrate and corresponding touch lcd |
| CN105185329A (en) * | 2015-09-06 | 2015-12-23 | 青岛海信电器股份有限公司 | Image display method and liquid crystal display apparatus |
| CN110796994A (en) * | 2019-11-27 | 2020-02-14 | Tcl华星光电技术有限公司 | Liquid crystal display and driving circuit thereof |
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2011
- 2011-04-06 CN CN2011200985043U patent/CN201984788U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102737590A (en) * | 2011-04-06 | 2012-10-17 | 青岛海信电器股份有限公司 | Scanning electrode driving method and system and liquid crystal display |
| CN103176318A (en) * | 2011-12-20 | 2013-06-26 | 上海天马微电子有限公司 | Thin film transistor array panel and liquid crystal display (LCD) device |
| CN103176318B (en) * | 2011-12-20 | 2016-05-18 | 上海天马微电子有限公司 | Thin-film transistor display panel and liquid crystal indicator |
| WO2015096210A1 (en) * | 2013-12-26 | 2015-07-02 | 深圳市华星光电技术有限公司 | Touch liquid crystal display (lcd) array substrate and corresponding touch lcd |
| CN105185329A (en) * | 2015-09-06 | 2015-12-23 | 青岛海信电器股份有限公司 | Image display method and liquid crystal display apparatus |
| CN105185329B (en) * | 2015-09-06 | 2018-05-29 | 青岛海信电器股份有限公司 | A kind of method for displaying image and liquid crystal display device |
| CN110796994A (en) * | 2019-11-27 | 2020-02-14 | Tcl华星光电技术有限公司 | Liquid crystal display and driving circuit thereof |
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