CN101881911B - Liquid crystal display and driving method thereof - Google Patents
Liquid crystal display and driving method thereof Download PDFInfo
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- CN101881911B CN101881911B CN2009100509858A CN200910050985A CN101881911B CN 101881911 B CN101881911 B CN 101881911B CN 2009100509858 A CN2009100509858 A CN 2009100509858A CN 200910050985 A CN200910050985 A CN 200910050985A CN 101881911 B CN101881911 B CN 101881911B
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Abstract
The invention relates to a liquid crystal display and a driving method thereof. The liquid crystal display comprises a plurality of pixel regions, a plurality of scanning wires, a plurality of data wires, a first base plate, a second base plate, a liquid crystal layer, a first common electrode, a second common electrode, a pixel switch element and a pixel electrode, wherein the second base plate and the first base plate are arranged in opposite directions, the liquid crystal layer is arranged between the first base plate and the second base plate, the first common electrode is arranged on the inner side of the first base plate, the second common electrode is arranged on the inner side of the second base plate, the pixel switch element is arranged at a crossed part of the data wires and the scanning wires on the first base plate and is electrically connected with the scanning wires and the data wires, the pixel electrode is arranged on the first common electrode and is electrically connected with the pixel switch element, the first common electrode is provided with the side edge projected out of the boundary of the pixel electrode, the projected side edge forms a lateral electric field when driving signals are exerted, and the lateral electric field can promote liquid crystal molecules to generate deflection. The response speed is improved, and the wide visual angle of the image display is realized.
Description
Technical field
The present invention relates to lcd technology, particularly liquid crystal indicator and driving method thereof
Background technology
Because advantages such as liquid crystal indicator has gently, approaches, occupation of land is little, power consumption is little, radiation is little are widely used in the various data processing equipments, for example TV, notebook computer, mobile phone, personal digital assistant etc.(Thin Film Transistor Liquid Crystal Display TFT-LCD) is modal a kind of liquid crystal indicator to adopt thin film transistor (TFT) to control the thin-film transistor LCD device that liquid crystal molecule is arranged in the liquid crystal indicator.
Liquid crystal indicator can be divided into different patterns according to the orientation of liquid crystal molecule wherein.For example, known, twisted-nematic (the Twist Nematic that makes up in the twisted-oriented that is not applied under the voltage condition through liquid crystal molecule; TN) pattern.In the structure of TN pattern, liquid crystal molecule is parallel to the direction of orientation of rotating liquid crystal molecule successively in the plane of substrate simultaneously along the direction orientation perpendicular to base plan.So, in the TN pattern, have the shortcoming that the visual angle is less, the response time is long, aperture opening ratio is low.
In view of this, industry has proposed a kind of vertical orientation (Vertically Aligned again; VA) pattern, under the VA pattern, liquid crystal can not produce so-called distortion in following the liquid crystal aligning that applies voltage and produce, so the response time is short, the visual angle is bigger, thereby obtains popularizing rapidly.
Specifically, vertical orientation (Vertically Aligned; VA) liquid crystal indicator of mode has and is formed with transparency electrode at medial surface and disposes a pair of transparency carrier of Polarizer in the outside.Between two transparency carriers, fill the liquid crystal molecule of negative dielectric anisotropic; When on the electrode of its two side; Indium tin oxide (ITO) electrode for example, apply electric field after, liquid crystal molecule can deflect under electric field action; Cooperate the setting of polaroid and backlight and produced optical path difference, realize the demonstration of image with this.But if biasing electric field is equally distributed fully, liquid crystal molecule is mixed and disorderly orientation when deflection.The deflection of this mixed and disorderly orientation not only will expend the extremely long response time; And random deflection meeting forms a plurality of mixed and disorderly farmlands; The farmland line of farmland and farmland intersection then becomes invalid viewing area, the corresponding actual aperture rate that has reduced pixel because liquid crystal molecule can't deflection.Therefore, the deflection situation of artificially controlling liquid crystal molecule is an important topic of VA pattern.
At present; Solve improving one's methods of the random deflection of liquid crystal molecule and mainly contain two kinds: a kind of is multi-domain vertical alignment (Multi-domain Vertical Alignment; MVA), it is to make the projection (Rib) of definite shape so that liquid crystal molecule acquisition inclination riveting is fixed at the ITO electrode surface, is not applying under the state of voltage; Orientation can the rough inclination along with the formation of projection in the liquid crystal molecule of vertical direction, and the yawing moment of liquid crystal molecule just is under control under the situation of pre-dumping.Another kind is that image adjusts vertically that (Patterned VerticalAlignment, PVA), it is on the ITO electrode, draw to carve slit to form tilting electric field and ITO edge lateral electric fields, utilizes the electric field of regular vergence direction to confirm the yawing moment of liquid crystal molecule.About also mentioning in two kinds of Chinese invention patent ublic specification of application that are presented in application number 20051008255.4 of improving one's methods of the vertical adjustment of above-mentioned multi-domain vertical alignment with image.
But, to improve one's methods and need on the ITO electrode, make projection or slit respectively for above-mentioned two kinds, complex manufacturing technology increases the technology cost.
Summary of the invention
The purpose of this invention is to provide a kind of liquid crystal indicator, with solve in the prior art must be on electrode extra making projection or draw carve slit and control liquid crystal molecule pre-dumping deflection and be prone to the problem that causes complex process, cost to increase.
For addressing the above problem, the present invention provides a kind of liquid crystal indicator on the one hand, has a plurality of pixel regions, some sweep traces and plurality of data line, and said liquid crystal indicator comprises:
First substrate;
Second substrate is with said first substrate and is oppositely arranged;
Include the liquid crystal layer of liquid crystal molecule, be located between said first substrate and said second substrate;
First common electrode is located at the inboard of said first substrate;
Second common electrode is located at the inboard of said second substrate;
The pixel switch element is located at the intersection of data line and sweep trace on said first substrate, and is electrically connected on said sweep trace and data line;
Pixel electrode is located on said first common electrode, and is electrically connected on said pixel switch element; Said first common electrode has the lateral margin on the border that protrudes in said pixel electrode, and said outstanding lateral margin forms when applying drive signal and impels liquid crystal molecule to produce the lateral electric fields of deflection.
Alternatively, said liquid crystal indicator also comprises: scan line drive circuit is used to apply sweep signal to sweep trace; Data line drive circuit is used to apply data-signal to data line.
Alternatively, said pixel switch element is a thin film transistor (TFT), specifically comprises: grid, be electrically connected on sweep trace, and be used for carrying out conducting/shutoff operation according to sweep trace; Source electrode is electrically connected on data line, receives data-signal; Drain electrode is electrically connected on pixel electrode.
Alternatively, between said pixel electrode and said first common electrode, also comprise gate insulator.
Alternatively, the lateral margin of said first common electrode with the border that protrudes in said pixel electrode comprise said first common electrode any two opposite side edges or said first common electrode around lateral margin protrude in the border of said pixel electrode.
Alternatively, the said drive signal that applies comprises: the drive signal that applies one or many under the drive pattern in the duration of each two field picture that comprises drive pattern and display mode; Input drive signal under said drive pattern is used to form the regular farmland of liquid crystal molecule; The input shows signal is used for display image under said display mode.
Alternatively, said drive signal is greater than the pixel electrode voltage voltage of signals pulse signal that puts on the said pixel electrode.
Alternatively, said drive signal is the voltage pulse signal of 10V～20V.
The present invention provides a kind of driving method of liquid crystal indicator on the other hand; Said liquid crystal indicator comprises: be first, second substrate that is oppositely arranged; Be located at the liquid crystal layer between said first substrate and said second substrate; Be located at first, second common electrode of the inboard of said first, second substrate respectively, be located at the pixel electrode on said first common electrode; Said first common electrode has the lateral margin on the border that protrudes in said pixel electrode; Wherein, Said driving method comprises: in the duration of each two field picture; Said first common electrode is applied drive signal, and the lateral margin that in first common electrode, protrudes in the border of said pixel electrode forms and impels liquid crystal molecule to produce the lateral electric fields of deflection.
Alternatively, the said drive signal that applies specifically refers to: the drive signal that applies one or many under the drive pattern in the duration of each two field picture that comprises drive pattern and display mode; Input drive signal under said drive pattern is used to form the regular farmland of liquid crystal molecule; The input shows signal is used for display image under said display mode.
Alternatively, when the number of times that applies drive signal was one time, said drive signal was to apply at the start time point place of each two field picture.
Alternatively, when the number of times that applies drive signal was secondary, said drive signal was to apply at the start time point and the interlude point place of each two field picture respectively.
Alternatively, said drive signal is greater than the pixel electrode voltage voltage of signals pulse signal that puts on the said pixel electrode.
Alternatively, said drive signal is the voltage pulse signal of 10V～20V.
Liquid crystal indicator of the present invention; Wherein having two opposite side edges in first common electrode at least is the borders that protrude in said pixel electrode, and promptly first common electrode has the lateral margin on the border that protrudes in said pixel electrode, makes said outstanding lateral margin when applying drive signal and drive, can form lateral electric fields; Impel liquid crystal molecule to produce the deflection of specific pre-dumping direction; Form a plurality of regular farmlands, improved response speed, realized wide viewing angle.
Simultaneously, liquid crystal indicator of the present invention, needn't as will be on electrode in the prior art extra making projection or draw and carve slit and control liquid crystal molecule pre-dumping deflection, technology is simple relatively, is beneficial to and controls cost.
Description of drawings
Fig. 1 is the three-dimensional exploded view of liquid crystal indicator of the present invention;
Fig. 2 is the pixel region structural representation in one embodiment of liquid crystal indicator of the present invention;
Fig. 3 is first a common electrode shown in Figure 2 structural representation in one embodiment;
Fig. 4 is the structural representation of pixel electrode shown in Figure 2 in first embodiment;
Fig. 5 is a pixel electrode shown in Figure 2 structural representation in a second embodiment;
Fig. 6 a, Fig. 6 b are that pixel electrode is located at the view on first common electrode in other embodiments;
Fig. 7 is the schematic cross-section of A--A ' the line of cut position of Fig. 2;
Fig. 8 is the variation diagram on the liquid crystal molecule formation rule farmland of Fig. 7 after first common electrode applies drive signal;
Fig. 9 is the sequential chart on driving method formation rule farmland in first embodiment of liquid crystal indicator of the present invention;
Figure 10 is the driving method of the liquid crystal indicator of the present invention sequential chart on formation rule farmland in a second embodiment.
Embodiment
The inventor finds; In the liquid crystal indicator of existing vertical alignment mode; On the improving one's methods of the deflection situation that solves the control liquid crystal molecule; No matter be to adopt multi-domain vertical alignment method or the vertical method of adjustment of image, all, improved the complexity and the corresponding cost of manufacture that increased of technology because of wanting extra increase respectively together making projection on the electrode or on electrode, drawing the processing step of carving slit.
In view of this; The present invention provides a kind of liquid crystal indicator; Wherein pixel electrode and electrode (being common electrode) have been done structural adjustment, made when applying drive signal and drive, can form and to impel liquid crystal molecule to produce the lateral electric fields of the deflection of specific pre-dumping direction, when improving response speed and realizing wide viewing angle; More can simplify technology, control cost.
Fig. 1 shows the three-dimensional exploded view of liquid crystal indicator of the present invention.As shown in Figure 1, liquid crystal indicator 1 of the present invention comprises display panel 10, and being used to display panel 10 provides the scan line drive circuit 12 of sweep signal and be used to the data line drive circuit 14 that display panel 10 provides data-signal.Wherein, scan line drive circuit 12 is electrically connected on a plurality of sweep traces 120, and data line drive circuit 14 is electrically connected on a plurality of data lines 140, and wherein sweep trace 120 and data line 140 are for being crisscross arranged.Comprise in the display panel 10 and be first substrate 101 that is oppositely arranged, second substrate 102, be located at the first inboard common electrode 103 of first substrate 101, be located at the second inboard and relative common electrode 104 of second substrate 102 with first common electrode 103; And be located at and be provided in the liquid crystal layer 105 that comprises a plurality of liquid crystal molecules between first common electrode 103 and second common electrode 104, in liquid crystal layer 105, include liquid crystal molecule.
In addition; In display panel 10, be formed with a plurality of pixel regions 106 of being located on first common electrode 103; Wherein each pixel region 106 all comprises: be electrically connected on sweep trace 120 and data line 140 thin film transistor (TFT) (Thin Film Transistor, TFT) 107, be electrically connected on the pixel electrode 108 of thin film transistor (TFT) 107.Said thin film transistor (TFT) 107 is used for as the pixel switch element.
Liquid crystal molecule in the said liquid crystal layer 105 is a negative dielectric anisotropic, do not applying under the voltage condition, said liquid crystal molecule be orientation in the perpendicular direction of first, second substrate 101,102 on.
Fig. 2 shows the pixel region structural representation in one embodiment of liquid crystal indicator of the present invention.In conjunction with Fig. 1 and Fig. 2; 101 upper edge first direction X are provided with some grid metal lines 201 (being sweep trace 120) at first substrate; The edge second direction Y vertical with first direction X is provided with some source pole metal lines 202 (being data line 140), is provided with active area 203 and drain region 204 in grid metal lines 201 and the zone that source pole metal lines 202 intersects.The grid that is extended by grid metal lines 201 as the thin film transistor (TFT) 107 of pixel switch element, the source electrode that is extended by source pole metal lines 202 and the drain electrode that is electrically connected on pixel electrode 108 constitute.
In addition; Between the pixel electrode 108 and first common electrode 103, also be provided with gate insulator (not shown); On gate insulator, offer via hole 205; Can the data-signal that transmit via source pole metal lines 202 on the drain region 204 be offered pixel electrode 108 when being used for the sweep signal conducting membrane transistor 107 on grid metal lines 201; Owing to want much little by the caused leaping voltage relative data of stray capacitance signal in the thin film transistor (TFT) 107, so here, said data-signal promptly can be used as the pixel electrode voltage signal that is electrically connected on the pixel electrode 108 of drain electrode in the thin film transistor (TFT) 107.
First common electrode 103 is arranged to structure as shown in Figure 3, and its line along first direction X makes in the display panels first common electrode 103 with each pixel region 106 of delegation communicate with each other.Especially, be under the situation of transmission-type at display panel 10, also offer a plurality of through holes 206 that are used for printing opacity at the zone line of first common electrode 103, be used to supply pixel electrode 108 to receive light sources through through hole 206.Certainly, be under the situation of reflection-type at display panel 10, on first common electrode 103, offer the technology of through hole 206 and just can omit.
In the above-described embodiments, pixel electrode 108 be shaped as rectangle (like Fig. 2 and shown in Figure 4), but not as limit, in other embodiments, the shape of said pixel electrode can also have other variant, for example is circular (as shown in Figure 5) or bar shaped etc.
In order to make liquid crystal molecule implementation rule farmland arrange, first common electrode 103 has the lateral margin on the border that protrudes in pixel electrode 108.In conjunction with Fig. 3 and Fig. 4; In the present embodiment; The boundary dimensions of first common electrode 103 is greater than the boundary dimensions of pixel electrode 108; That is: be located at 103 last times of first common electrode when pixel electrode 108, the edge of first common electrode 103 all protrudes in the border (consulting Fig. 2) of pixel electrode 108.
What need explanation is that in the present embodiment, the boundary dimensions of first common electrode 103 is greater than the boundary dimensions of pixel electrode 108.But not as limit; In other embodiments; As long as can guarantee the implementation rule farmland arranges; The boundary dimensions that said first common electrode is relevant with pixel electrode still can be done other change; For example said first common electrode can make said first common electrode outstanding lateral margin on first direction X or second direction Y when applying drive signal, form and impel liquid crystal molecule to produce the lateral electric fields of deflection as long as on said first direction X or second direction Y, have two opposite side edges (shown in Fig. 6 a, 6b) on the border that protrudes in said pixel electrode, can realize equally arranging in the regular farmland of liquid crystal molecule.
Please continue to consult Fig. 7, it is the schematic cross-section of A--A ' the direction line of cut position of Fig. 2.As shown in Figure 7, on first substrate (not shown), be provided with first common electrode 103 (also can be called storage capacitor electrode), on first common electrode 103, be provided with gate insulator 300 and pixel electrode 108 in regular turn.A side that is last relative first substrate of second substrate (not shown) that is oppositely arranged with first substrate is formed with second common electrode 104.Between the pixel electrode 108 and second common electrode 104, set the liquid crystal layer 105 that includes liquid crystal molecule 301.Especially, in the above-described embodiments, the boundary dimensions of first common electrode 103 is the boundary dimensionss that are greater than pixel electrode 108, that is to say, the edge of first common electrode 103 will protrude in the border of pixel electrode 108.In addition, pixel electrode 108 can be by indium tin oxide (ITO) or indium-zinc oxide (IZO) made; Equally, first, second common electrode 103,104 also can be by indium tin oxide (ITO) or indium-zinc oxide (IZO) made.
Generally; The current potential of first common electrode 103 keeps ground connection; Perhaps be consistent with the current potential of second common electrode 104 all the time; Make the potential difference (PD) between the pixel electrode 108 and second common electrode 104 keep stable, be beneficial to and keep the even of electric field that the liquid crystal molecule 301 in the middle of avoiding scintillation occurs because of irregular deflection takes place.
In addition, as shown in Figure 8, if a drive signal is provided, then between first common electrode 103 and pixel electrode 108, can form electric field on first common electrode 103.Said drive signal can be greater than a voltage pulse signal (for example being 15V) that puts on the pixel electrode voltage signal (for example being 5V) on the said pixel electrode.Because the boundary dimensions of first common electrode 103 is greater than the boundary dimensions of pixel electrode 108; Promptly; The edge of first common electrode 103 protrudes in the edge of pixel electrode 108; Like this, first common electrode, 103 relative pixel electrode 108 outstanding parts will form lateral electric fields 302 under the situation that drive signal applies.Under the effect of lateral electric fields 302, the liquid crystal molecule 301 (negative dielectric anisotropic) that is adjacent to the pixel region edge of lateral electric fields 302 will complied with direction (pointing to pixel electrode 108 by the first common electrode 103) deflection perpendicular to electric field line.Further; Under the continuous action of lateral electric fields 302; The inner liquid crystal molecule 301 of pixel region also can be done the deflection of pre-dumping direction under the drive of liquid crystal molecule 301 on the edge of, thereby makes all liquid crystal molecules in the pixel region under the situation that has applied drive signal, can both confirm the pre-dumping direction, the formation rule farmland; Improve response speed, can realize the wide viewing angle that image shows.And remove back (transferring low-voltage to, for example ground connection) in the drive signal that puts on first common electrode 103, because the liquid crystal molecule 301 of this moment has been confirmed the pre-dumping direction, therefore still can keep regular farmland state within a certain period of time.Relatively in the MVA pattern, to make the projection of definite shape on the indium-tin oxide electrode surface or in the PVA pattern, will on indium-tin oxide electrode, draw and carve slit and obtain liquid crystal molecule and keep the prior art of pre-dumping direction to compare, technology of the present invention simply and liquid crystal molecule pre-dumping effect rather good.
In addition, be prone to know, be employed in first common electrode 103 and apply drive signal and make liquid crystal molecule that the deflection and the formation rule farmland of pre-dumping direction arranged under the effect of lateral electric fields 302.The deflection meeting of this pre-dumping direction under lateral electric fields produces the trend of degenerating, and promptly keeps can returning back to initial plumbness again after the pre-dumping direction of certain hour.For preventing the above-mentioned degeneration that possibly occur, will in the gap of certain hour that is separated by, on first common electrode 103, apply drive signal once more, to guarantee the deflection of the liquid crystal molecule maintenance pre-dumping direction in the pixel region.Therefore, in other embodiments, the number of times that applies drive signal can also be more than or equal to secondary repeatedly according to actual conditions.
See also Fig. 9, it has shown the sequential chart on driving method formation rule farmland in first embodiment of liquid crystal indicator of the present invention.As shown in Figure 9, in the duration T of a two field picture, include drive pattern and display mode, wherein, input drive signal under said drive pattern is to realize the regular farmland of liquid crystal molecule; And under said display mode, import shows signal, show to realize image.Existing hypothesis: in the duration T of a two field picture, the shared time of drive pattern is called regular farmland and forms the period 401, and the shared time of display mode is called image display time interval 402.In first embodiment, specifically, suppose that second common electrode 104 for the DC voltage less than 5V, for example is 0V.Form the period on regular farmland; On first common electrode 103, apply the drive signal of doing the deflection of pre-dumping direction in order to drives liquid crystal molecules 301; Said drive signal (for example being 15V) is wanted relatively greater than the pixel electrode voltage signal (for example being 5V) that puts on the pixel electrode 108; In regular farmland forms the period 401, to make the common electrode 103 relative pixel electrodes 108 of winning is noble potential, guarantees the formation of the two lateral electric fields 302.And; The pulsewidth of said voltage pulse signal also is greater than the pulsewidth of the sweep signal that on grid metal lines 201, applies; So that lateral electric fields 302 certain time that form, guarantee that the liquid crystal molecule 301 in the pixel region all does the deflection and the formation rule farmland of pre-dumping direction.Preferably, it is the leading portions that are in the duration T of a two field picture that regular farmland forms the period 401, and promptly said voltage pulse signal is the start time point place that appears at each two field picture.And, on grid metal lines 201, apply the sweep signal that is used for conducting membrane transistor 107 at image display time interval 403, make pixel electrode 108 can obtain to be used for the drive signal of display image.Therefore, in first embodiment, in each two field picture, applied the drive signal that once can make liquid crystal molecule formation rule farmland at first common electrode 103.Like this, as being the cycle to carry out periodicity repeatedly with each frame among Fig. 9, said liquid crystal indicator just obtains good the demonstration.
In the present invention, second common electrode 104 remains ground connection (also promptly being in 0 current potential), so in practical application, first common electrode 103 can link to each other through an on-off circuit with second common electrode 104.Concrete operations are: form the period 401 (under the drive pattern) on regular farmland, break off said on-off circuit, first common electrode 103 is applied drive signal, produce voltage pulse signal; And at image display time interval 403 (under the display mode), ground connection after the said on-off circuit of conducting, first common electrode 103 link to each other with second common electrode 104.But not as limit; In other embodiments; First common electrode 103 and second common electrode 104 still can be done other changes, and for example first common electrode 103 and second common electrode 104 are separate, and second common electrode 104 is ground connection all the time; 103 of first common electrodes by signal control circuit control under drive pattern, producing drive signal, and under display mode first common electrode, 103 generations, 0 electric potential signal consistent with second common electrode 104.
See also like Figure 10, its driving method that has shown liquid crystal indicator of the present invention is the sequential chart on formation rule farmland in a second embodiment.Shown in figure 10, comprise also that in the duration T of a two field picture regular farmland forms period 403 (under the drive pattern) and image display time interval 404 (under the display mode).But compare with first embodiment, in a second embodiment, under drive pattern, have two regular farmlands and form the period 403, promptly in the duration T of a two field picture, first common electrode 103 has been applied the secondary drive signal altogether.Preferably, applying the first time of said drive signal is the start time point place that appears at a two field picture, applies the interlude point that then appears at a two field picture for the second time, like this, can increase the formation time of lateral electric fields relatively.
Compare with first embodiment, be applied in secondary before and after in a second embodiment the drive signal, increased the formation time of lateral electric fields relatively, can avoid liquid crystal molecule in a two field picture time interior pixel district to produce and degenerate in the deflection of pre-dumping direction.
In addition; In a second embodiment, first, second time drive signal apply start time point and the interlude point that appears at a two field picture respectively, but not as limit; In other embodiments; Said secondary drive signal apply the change that still can do other, promptly drive signal can apply on other times point, for example for the first time drive signal apply 1/4th time point places that appear at a two field picture duration; For the second time drive signal apply 3/4ths time point places that appear at a two field picture duration, should have same effect.
It should be noted that; Because said regular farmland forms the period and said image display time interval is nonoverlapping in time; Under certain situation of the duration of a two field picture; Increase the shared time (the regular farmland formation shared time of period is directly proportional with the number of times that applies drive signal) of regular farmland formation period under the drive pattern, certainly will cause the corresponding minimizing of display mode hypograph display time interval, in the not very large amorphous silicon device of charging current; The undue shortening in duration of charging can cause a lot of problems, for example picture crosstalk in the image display time interval.Therefore, in this, the number of times that applies drive signal can be definite according to remaking behind the actual conditions comprehensive consideration in practical application.
Though the present invention discloses as above with preferred embodiment, the present invention is defined in this.Any those skilled in the art are not breaking away from the spirit and scope of the present invention, all can do various changes and modification, so protection scope of the present invention should be as the criterion with claim institute restricted portion.
Claims (14)
1. a liquid crystal indicator has a plurality of pixel regions, some sweep traces and plurality of data line, it is characterized in that said liquid crystal indicator comprises:
First substrate;
Second substrate is with said first substrate and is oppositely arranged;
Liquid crystal layer is located between said first substrate and said second substrate;
First common electrode is located at the inboard of said first substrate;
Second common electrode is located at the inboard of said second substrate;
The pixel switch element is located at the intersection of data line and sweep trace on said first substrate, and is electrically connected on said sweep trace and data line;
Pixel electrode is located on said first common electrode, and is electrically connected on said pixel switch element; Said first common electrode has the lateral margin on the border that protrudes in said pixel electrode; Said outstanding lateral margin forms when applying drive signal and impels liquid crystal molecule to produce the lateral electric fields of deflection, and said drive signal comprises in order to drive said liquid crystal molecule makes the drive signal of pre-dumping direction deflection.
2. liquid crystal indicator according to claim 1 is characterized in that, also comprises:
Scan line drive circuit is used to apply sweep signal to sweep trace;
Data line drive circuit is used to apply data-signal to data line.
3. liquid crystal indicator according to claim 1 is characterized in that, said pixel switch element is a thin film transistor (TFT), specifically comprises: grid, be electrically connected on sweep trace, and be used for carrying out conducting/shutoff operation according to sweep trace; Source electrode is electrically connected on data line, receives data-signal; Drain electrode is electrically connected on pixel electrode.
4. liquid crystal indicator according to claim 1 is characterized in that, between said pixel electrode and said first common electrode, also comprises gate insulator.
5. liquid crystal indicator according to claim 1; It is characterized in that, the lateral margin that said first common electrode has the border that protrudes in said pixel electrode comprise said first common electrode any two opposite side edges or said first common electrode around lateral margin protrude in the border of said pixel electrode.
6. liquid crystal indicator according to claim 1 is characterized in that, the said drive signal that applies comprises: the drive signal that applies one or many under the drive pattern in the duration of each two field picture that comprises drive pattern and display mode; Input drive signal under said drive pattern is used to form the regular farmland of liquid crystal molecule; The input shows signal is used for display image under said display mode.
7. according to claim 1 or 6 described liquid crystal indicators, it is characterized in that said drive signal is greater than the pixel electrode voltage voltage of signals pulse signal that puts on the said pixel electrode.
8. liquid crystal indicator according to claim 7 is characterized in that, said drive signal is the voltage pulse signal of 10V～20V.
9. the driving method of a liquid crystal indicator; Said liquid crystal indicator comprises: be first, second substrate that is oppositely arranged; Be located at the liquid crystal layer between said first substrate and said second substrate; Be located at first, second common electrode of the inboard of said first, second substrate respectively, be located at the pixel electrode on said first common electrode; Said first common electrode has the lateral margin on the border that protrudes in said pixel electrode; Wherein, said driving method comprises:
In the duration of each two field picture; Said first common electrode is applied drive signal; The lateral margin that in said first common electrode, protrudes in the border of said pixel electrode forms and impels liquid crystal molecule to produce the lateral electric fields of deflection, and said drive signal comprises in order to drive said liquid crystal molecule makes the drive signal of pre-dumping direction deflection.
10. the driving method of liquid crystal indicator according to claim 9; It is characterized in that the said drive signal that applies specifically refers to: the drive signal that applies one or many under the drive pattern in the duration of each two field picture that comprises drive pattern and display mode; Input drive signal under said drive pattern is used to form the regular farmland of liquid crystal molecule; The input shows signal is used for display image under said display mode.
11. the driving method of liquid crystal indicator according to claim 10 is characterized in that, when the number of times that applies drive signal was one time, said drive signal was to apply at the start time point place of each two field picture.
12. the driving method of liquid crystal indicator according to claim 10 is characterized in that, when the number of times that applies drive signal was secondary, said drive signal was to apply at the start time point and the interlude point place of each two field picture respectively.
13. the driving method of liquid crystal indicator according to claim 9 is characterized in that, the said drive signal that applies is greater than the pixel electrode voltage voltage of signals pulse signal that puts on the said pixel electrode.
14. the driving method of liquid crystal indicator according to claim 13 is characterized in that, said drive signal is the voltage pulse signal of 10V～20V.
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| CN102540594B (en) * | 2010-12-10 | 2015-07-22 | 上海天马微电子有限公司 | Pixel array, display panel, liquid crystal displayer and method for driving pixel array |
| WO2019006665A1 (en) * | 2017-07-04 | 2019-01-10 | 昆山龙腾光电有限公司 | Method for driving liquid crystal display device capable of switching between wide viewing angle and narrow viewing angle |
| CN114167651B (en) * | 2021-12-10 | 2023-10-31 | Tcl华星光电技术有限公司 | Liquid crystal display panel having a light shielding layer |
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| CN101114093A (en) * | 2006-07-28 | 2008-01-30 | 三星电子株式会社 | Liquid crystal display, method of manufacturing the same, and method of repairing the same |
| CN101145563A (en) * | 2006-09-11 | 2008-03-19 | 中华映管股份有限公司 | Pixel structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1755464A (en) * | 2004-09-30 | 2006-04-05 | 卡西欧计算机株式会社 | Vertical alignment active matrix liquid crystal display device |
| CN1908789A (en) * | 2005-08-02 | 2007-02-07 | 三星电子株式会社 | Liquid crystal display device |
| CN101097375A (en) * | 2006-06-30 | 2008-01-02 | Lg.菲利浦Lcd株式会社 | Array substrate for liquid crystal display device and method of fabricating the same |
| CN101114093A (en) * | 2006-07-28 | 2008-01-30 | 三星电子株式会社 | Liquid crystal display, method of manufacturing the same, and method of repairing the same |
| CN101145563A (en) * | 2006-09-11 | 2008-03-19 | 中华映管股份有限公司 | Pixel structure |
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