CN102445793B - Liquid crystal display device and drive method thereof - Google Patents
Liquid crystal display device and drive method thereof Download PDFInfo
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- CN102445793B CN102445793B CN201010509116.XA CN201010509116A CN102445793B CN 102445793 B CN102445793 B CN 102445793B CN 201010509116 A CN201010509116 A CN 201010509116A CN 102445793 B CN102445793 B CN 102445793B
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Abstract
The invention discloses a liquid crystal display device which is provided with a first substrate, a second substrate arranged opposite to the first substrate, and a liquid crystal layer arranged between the first substrate and the second substrate, wherein the liquid crystal layer comprises a plurality of scanning lines and data lines, which are arranged on the second substrate and are mutually isolated and crossed; the liquid crystal device is divided into a plurality of pixel regions, each pixel region comprises a pixel switch element and a pixel electrode, a first sharing electrode and a second sharing electrode, the pixel switch element is electrically connected with the scanning line, the data line and the pixel electrode; the first sharing electrode is arranged on the inner side of the first substrate, opposite to the second substrate; the second sharing electrode is arranged on the inner side of the second substrate, opposite to the first substrate; the second sharing electrode is positioned above the pixel electrode and isolated from the pixel electrode; and the second sharing electrode also comprises a through hole, the through hole and the pixel electrode are overlapped in a light-transmitting direction so that a lateral electric field for controlling liquid crystal molecules to deflect is generated between the second sharing electrode and the pixel electrode. The liquid crystal display device can realize a wide viewing angle.
Description
Technical field
The present invention relates to lcd technology, particularly liquid crystal indicator and driving method thereof
Background technology
Liquid crystal indicator with light, thin, take up an area the advantages such as little, power consumption is little, radiation is little, be widely used in various data processing equipment, such as TV, notebook computer, mobile phone, personal digital assistant etc.Thin-film transistor LCD device (Thin Film Transistor Liquid Crystal Display, TFT-LCD) be one of modal liquid crystal indicator, TFT-LCD adopts thin film transistor (TFT) to control liquid crystal molecule arrangement in liquid crystal indicator.
Homeotropic alignment (Vertically Aligned; VA) pattern is a kind of wide viewing angle technology of TFT-LCD, specifically, the liquid crystal indicator of VA pattern comprises, first substrate, second substrate and the liquid crystal layer between first substrate and second substrate, described liquid crystal layer comprises multiple liquid crystal molecule, and described liquid crystal molecule is negative liquid crystal; Respectively at the electrode of first substrate, second substrate, such as, on tin indium oxide (ITO) electrode during on-load voltage, biasing electric field can be produced, described biasing electric field makes liquid crystal molecule be parallel to base plan topple over from turning to perpendicular to substrate arrangement, coordinate the setting of polaroid and backlight and create optical path difference, realizing the display of image with this.
But if biasing electric field is completely equally distributed, liquid crystal molecule is exactly mixed and disorderly orientation when deflecting.The deflection of this mixed and disorderly orientation not only will expend the extremely long response time, and random deflection can form multiple mixed and disorderly farmland, the farmland line of farmland and farmland intersection cannot deflect due to liquid crystal molecule, then become invalid viewing area, correspondingly reduces the actual aperture rate of pixel.Therefore, the deflection situation of manual control 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: one is multi-domain vertical alignment (Multi-domain Vertical Alignment, MVA), it is that the projection making definite shape on ITO electrode surface is determined to make liquid crystal molecule obtain inclination riveting, do not executing under alive state, orientation in vertical direction liquid crystal molecule can because of projection slightly inclined, when pre-dumping, the yawing moment of liquid crystal molecule is just under control.Another kind is that image vertically adjusts (Pattemed Vertical Alignment, PVA), it is that scribing slit, to form tilting electric field and ITO edge lateral electric fields, utilizes the electric field of regular vergence direction to determine the yawing moment of liquid crystal molecule in ITO electrode.
But, improve one's methods and need respectively in ITO electrode, to make projection or slit, complex manufacturing technology for above-mentioned two kinds, increase process costs.
Summary of the invention
The object of this invention is to provide a kind of liquid crystal indicator, to solve complex process, problem that cost is higher.
In order to solve the problem, the invention provides a kind of liquid crystal indicator, there is first substrate, with described first substrate in the second substrate be oppositely arranged, and be arranged at the liquid crystal layer between described first substrate and described second substrate, comprise:
Be positioned at sweep trace and data line that many mutually insulateds on second substrate intersect, described liquid crystal indicator is divided into multiple pixel region;
Described pixel region comprises pixel switch element and pixel electrode;
Described pixel switch element is electrically connected with described sweep trace, data line and pixel electrode;
First common electrode, is arranged at the inner side of described first substrate relative to second substrate;
Second common electrode, is arranged at the inner side of described second substrate relative to first substrate;
Described second common electrode is positioned at the top of described pixel electrode and insulate with described pixel electrode;
Described second common electrode also comprises through hole, and described through hole and described pixel electrode overlap on the printing opacity direction of liquid crystal display, to produce the lateral electric fields controlling liquid crystal deflecting element between the second common electrode and pixel electrode.
Correspondingly, the present invention also provides a kind of driving method of liquid crystal indicator, comprising:
Duration of each two field picture comprise frame scan during and retrace interval;
Within the scan period of each two field picture, signal is applied, for showing image to pixel electrode;
In the retrace interval of each two field picture, signal being applied to described second common electrode, impelling liquid crystal molecule to produce the lateral electric fields deflected for being formed between the through hole edge and described pixel electrode of described second common electrode;
The described lateral electric fields producing deflection in retrace interval lasts till the scan period of next frame image.
Liquid crystal indicator of the present invention, the through hole of described second common electrode and pixel electrode are overlapping on the printing opacity direction of liquid crystal display to be placed, lateral electric fields is produced between the through hole edge of described second common electrode and pixel electrode, described lateral electric fields, liquid crystal molecule is impelled to produce the deflection in specific pre-dumping direction, form multiple regular farmland, improve response speed, achieve wide viewing angle.
Meanwhile, liquid crystal indicator of the present invention, need not control liquid crystal molecule pre-dumping deflection as additionally made projection or scribing slit in prior art on electrode, technique is relatively simple, is beneficial to and controls cost.
Further, in liquid crystal indicator of the present invention, through hole and the pixel electrode of the second common electrode are placed without the need to symmetry, reduce technology difficulty.
Accompanying drawing explanation
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 a first embodiment of liquid crystal indicator of the present invention;
Fig. 3 is the schematic diagram of pixel electrode shown in Fig. 2;
Fig. 4 is the schematic diagram of the first common electrode shown in Fig. 2;
The pixel region that Fig. 5 is liquid crystal indicator of the present invention shown in Fig. 2 is along the cut-away view of hatching line AA ';
Fig. 6 is the schematic diagram of pixel electrode and the first common electrode in liquid crystal indicator second embodiment of the present invention;
Fig. 7 is the schematic diagram of pixel electrode and the first common electrode in liquid crystal indicator of the present invention 3rd embodiment;
Fig. 8 is the variation diagram on the liquid crystal molecule formation rule farmland after the first common electrode applying drive singal shown in Fig. 5;
Fig. 9 is that the first common electrode applies the variation diagram on the liquid crystal molecule formation rule farmland after drive singal in another embodiment;
Figure 10 is the sequential chart on the driving method formation rule farmland in a first embodiment of liquid crystal indicator of the present invention;
Figure 11 is the sequential chart on the driving method formation rule farmland in a second embodiment of liquid crystal indicator of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
In prior art, solving on the improving one's methods of deflection situation controlling liquid crystal molecule, no matter be adopt multi-domain vertical alignment method or the vertical method of adjustment of image, projection need be made on electrode or scribing slit on electrode, add processing step and improve cost of manufacture.
For the problems referred to above, the invention provides a kind of liquid crystal indicator, to wherein pixel electrode and common electrode have done structural adjustment, when applying drive singal to common electrode and driving, can form lateral electric fields between common electrode and pixel electrode, described lateral electric fields makes liquid crystal molecule produce the deflection in specific pre-dumping direction, in raising response speed with while realizing wide viewing angle, more can Simplified flowsheet, 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, for providing the scan line drive circuit 12 of sweep signal for display panel 10 and for providing the data line drive circuit 14 of data-signal for display panel 10.Wherein, described scan line drive circuit 12 is electrically connected on multi-strip scanning line 120, and described data line drive circuit 14 is electrically connected on a plurality of data lines 140, wherein mutually insulated and crossingly to arrange between sweep trace 120 with data line 140.
Display panel 10 comprises the first substrate 101, second substrate 102 and the liquid crystal layer 105 between first substrate 101, second substrate 102 that are oppositely arranged, includes liquid crystal molecule in described liquid crystal layer 105.The second common electrode 104 that described first substrate 101 is provided with the first common electrode 103 near the one side of liquid crystal layer 105, described second substrate 102 is provided with near the one side of liquid crystal layer 105.
In addition, multiple pixel region 106 marked off by sweep trace 120 and data line 140 is comprised at display panel 10, wherein each pixel region 106 comprises: be electrically connected on the thin film transistor (TFT) (Thin Film Transistor, TFT) 107 of sweep trace 120 and data line 140, be electrically connected on the pixel electrode 108 of thin film transistor (TFT) 107.Described thin film transistor (TFT) 107 is for as pixel region on-off element.
For second substrate 102, described second common electrode 104 is positioned at the top of described pixel electrode 108, realizes insulating between described second common electrode 104 and described pixel electrode 108 by insulation course; Described second common electrode 104 comprises through hole, the through hole of described second common electrode and pixel electrode 108 overlap on the printing opacity direction of liquid crystal display, to produce the lateral electric fields controlling liquid crystal deflecting element between the second common electrode and pixel electrode, particularly, the edge of described through hole flushes with the border of described pixel electrode, or within the edge of described through hole has at least a part to be positioned at the border of pixel electrode.Liquid crystal molecule in described liquid crystal layer 105 is negative liquid crystal, is not executing in alive situation, and described liquid crystal molecule is orientation on the direction perpendicular with first substrate 101, second substrate 102.
Fig. 2, shows the pixel region structural representation in one embodiment of liquid crystal indicator of the present invention.Composition graphs 1 and Fig. 2, second substrate 102 is provided with some grid metal lines 201 (i.e. sweep trace 120) along first direction X, be provided with some source pole metal lines 202 (i.e. data line 140) along the second direction Y vertical with first direction X, described grid metal lines 201 and source pole metal lines 202 surround pixel region.
The position crossing with source pole metal lines 202 in grid metal lines 201 is provided with TFT107, described TFT107 comprises grid 206, the gate insulator (not shown) be positioned on grid 206, the amorphous silicon layer 203 be positioned on gate insulator, be positioned at the source and drain insulation course (not shown) on amorphous silicon layer 203 and the source electrode 205 be positioned on source and drain insulation course and drain electrode 204, and wherein grid 206 is connected to grid metal lines 201, source electrode 205 is connected to source pole metal lines 202.Described TFT107 is light tight.
Pixel electrode 108, for the pixel voltage of Loading Control liquid crystal deflecting element, described pixel electrode 108 is transparency electrode, be such as tin indium oxide (ITO) or indium-zinc oxide (IZO), so can printing opacity, be provided with insulation course between described pixel electrode 108 and the drain electrode 204 of TFT107, described pixel electrode 108 is electrically connected by via hole 207 with the drain electrode of TFT107.
In the specific embodiment of liquid crystal indicator of the present invention, for square through-hole, through hole and the pixel electrode 108 of the second common electrode 104 are overlapped on the light direction of display.Pixel electrode 108 is also provided with insulation course (not shown), described second common electrode 104 is positioned on insulation course, realize insulating by insulation course and pixel electrode 108.
Continue with reference to figure 3, show the schematic diagram of pixel electrode 108 shown in Fig. 2.Pixel electrode 108 is provided with slit 208, for pixel electrode 108 is divided into multiple pixel electrode sub-block 217, as shown in Figure 4, realizes being electrically connected by connecting portion 209 between described adjacent pixel electrode sub-block 217.
Continue with reference to figure 4, show the schematic diagram of the second common electrode 104 shown in Fig. 2, second common electrode 104 extends to the outer peripheral areas of display panels along the connecting line 1041 of second direction Y, and linked together by the bus of display panel outer peripheral areas, thus the second common electrode 104 of each pixel region 106 in display panels is communicated with each other.
Particularly, described second common electrode 104 and the source electrode 205 in TFT107 with drain 204 material identical, the insulation course between the second common electrode 104 and pixel electrode 108 is identical with the material of described source and drain insulation course.Described second common electrode 104 is light tight, especially, when display panel 10 is transmission-type, also offer the multiple through holes 1042 for printing opacity at the zone line of the second common electrode 104, through pixel electrode 108 luminous energy described in through hole 1042 arrive the display surface of liquid crystal display.
Described second common electrode 104 is positioned at above pixel electrode 108 across insulation course, multiple through holes 1042 of described second common electrode 104 match with multiple pixel electrode sub-blocks 217 of described pixel electrode 108, particularly, the quantity of through hole 1042 is identical with the quantity of pixel electrode sub-block 217, and through hole 1042 is positioned at the top of its corresponding pixel electrode sub-block 217, its corresponding pixel electrode sub-block 217 overlaps on printing opacity direction, therefore described through hole 1042 can expose the pixel electrode sub-block 217 of pixel electrode 108, make pixel electrode sub-block 217 through light can arrive display surface by through hole 1042, thus make display panel can printing opacity.
In conjunction with reference to figure 5, show the cut-away view of pixel region along hatching line AA ' of liquid crystal indicator of the present invention shown in Fig. 2.Second substrate (not shown) is provided with pixel electrode 108, pixel electrode 108 comprises insulation course 211 and the second common electrode 104 successively, is formed with the first common electrode 103 with the side of the upper relative second substrate of the first substrate that second substrate is oppositely arranged (not shown).The liquid crystal layer 105 comprising multiple liquid crystal molecule 301 is provided with between pixel electrode 108 and the first common electrode 103.In the present embodiment, through hole 1042 is square, within the edge of through hole 1042 is all positioned at the border of pixel electrode 108.
It should be noted that, in order to make liquid crystal molecule implementation rule farmland arrange, within the second common electrode 104, the edge of through hole 1042 is all positioned at the border of pixel electrode 108.Like this, when the second common electrode 104 applies signal, can produce lateral electric fields between the second common electrode 104 and pixel electrode 108, described lateral electric fields can make the liquid crystal molecule of vertically arrangement deflect to horizontal direction, and then can realize the regular farmland arrangement of liquid crystal molecule.
It should be noted that, in the present embodiment, within the second common electrode 104, the edge of through hole 1042 is all positioned at the border of pixel electrode 108.But not as limit, in other embodiments, as long as can guarantee to arrange in implementation rule farmland, the boundary dimensions that the size of described second common electrode 104 through hole is relevant to pixel electrode still can do other change, in embodiment as shown in Figure 6, the through hole of the second common electrode 104 ' is square, and within the through hole of described second common electrode 104 ' is positioned at the border of pixel electrode 108 ' on described first direction X, and the through hole of the second common electrode 104 ' flushes with the border of pixel electrode 108 ' on described second direction Y; In embodiment as shown in Figure 7, described second common electrode 104 " on described first direction X and second direction Y, be all positioned at pixel electrode 108 " border within.When can make to apply signal on described first common electrode, the through hole edge of described first common electrode matches to be formed with pixel electrode at first direction X or second direction Y and impels liquid crystal molecule to produce the lateral electric fields deflected, and can realize the regular farmland arrangement of liquid crystal molecule equally.
Also it should be noted that, in above-described embodiment, for foursquare through hole, but the present invention is not restricted to this, described through hole can also be equilateral triangle or circle etc., and those skilled in the art correspondingly can replace the embodiment of the present invention according to above-described embodiment, change and revise.
Under normal circumstances, the current potential of the second common electrode 104 keeps ground connection, or be consistent with the current potential of the first common electrode 103 all the time, the potential difference (PD) between pixel electrode 108 and the first common electrode 103 is made to keep stable, being beneficial to and maintaining the even of electric field, avoiding middle liquid crystal molecule 301 to occur scintillation because there is irregular deflection.
In addition, as shown in Figure 8, if apply signal on the second common electrode 104, then electric field can be formed between the second common electrode 104 and pixel electrode 108.Described signal can be the voltage pulse signal being greater than the display current potential put on described pixel electrode 108, such as, show current potential in the scope of-5V ~+5V, the second common electrode 104 applies the signal of 15V.Because the second common electrode 104 to be positioned at the top of pixel electrode 108 across insulation course, and within the second common electrode 104, the edge of through hole 1042 is all positioned at the border of pixel electrode 108, like this, second common electrode 104 is when applying high potential signal, electric field will be formed between its part in pixel electrode 108 border and pixel electrode, described electric field comprises the overlapping region electric field 303 that the second common electrode 104 produces with pixel electrode 108 lap, the lateral electric fields 302 produced between the through hole edge of the second common electrode 104 and pixel electrode 108, described lateral electric fields 302 is near liquid crystal layer, liquid crystal molecule 301 in liquid crystal layer is deflected.
Under the effect of lateral electric fields 302, the direction that the liquid crystal molecule 301 (negative dielectric anisotropic) that is adjacent to the pixel edges of lateral electric fields 302 will be complied with perpendicular to electric field line deflects.Further, under the continuous action of lateral electric fields 302, the liquid crystal molecule 301 of pixel region inside also can do the deflection in pre-dumping direction under the drive of edge liquid crystal molecule 301, thus make all liquid crystal molecules 301 in pixel region can determine pre-dumping direction when being applied with drive singal, formation rule farmland, improve response speed, the wide viewing angle of image display can be realized.And (low-voltage is transferred to, such as ground connection) after the signal putting on the second common electrode 104 removes, because liquid crystal molecule 301 now has determined pre-dumping direction, therefore still regular farmland state can be maintained within a certain period of time.
Relatively will make the projection of definite shape on indium-tin oxide electrode surface or will obtain liquid crystal molecule and keep the prior art in pre-dumping direction to compare by scribing slit on indium-tin oxide electrode in PVA pattern in MVA pattern, technique of the present invention be simple and liquid crystal molecule pre-dumping effect is rather good.
It should be noted that, as long as through hole and pixel electrode 108 are overlapping on printing opacity direction in the present invention, the through hole of described second common electrode 104 is without the need to arranging according to symmetric mode with pixel electrode 108.As shown in Figure 9, the through hole of the second common electrode 104 offsets to the right relative to pixel electrode 108, the second common electrode 104 and pixel electrode 108 is made to be greater than overlapping region on right side in the overlapping region in left side, and then the overlapping region electric field 303 that the second common electrode 104 and pixel electrode 108 are produced in left side be greater than on the right side of the overlapping region electric field 303 that produces, but the through hole edge of the left and right sides of the second common electrode 104 is identical with the relative position between pixel electrode 108, so the lateral electric fields 302 of the left and right sides keeps symmetrical, and be lateral electric fields 302 to liquid crystal deflecting element generation effect, even if therefore the through hole of the second common electrode 104 not and pixel electrode 108 place according to symmetric mode, also symmetrical farmland distribution can be obtained, thus reduce technology difficulty.
In addition, adopt and apply there is the deflection in pre-dumping direction and formation rule farmland under signal makes the effect of liquid crystal molecule in lateral electric fields at the second common electrode.The deflection in this pre-dumping direction under lateral electric fields can produce the trend of degeneration, can return back to initial plumbness again after namely keeping the pre-dumping direction of certain hour.For preventing the above-mentioned degeneration that may occur, in the gap of certain hour that is separated by, on the second common electrode, again will apply signal, to guarantee the deflection in the liquid crystal molecule maintenance pre-dumping direction in pixel region.Therefore, in other embodiments, the number of times applying drive singal can also be more than or equal to secondary repeatedly according to actual conditions.
Refer to Figure 10, the sequential chart on the driving method which show liquid crystal indicator of the present invention formation rule farmland in a first embodiment.As shown in Figure 10, include frame scan in the duration T of a two field picture during and retrace interval, wherein, in during described frame scan, provide data-signal by data line to pixel electrode, to show image; In described retrace interval, signal is applied to described second common electrode, impel liquid crystal molecule to produce the lateral electric fields deflected for being formed between the through hole edge and described pixel electrode of described second common electrode, the described lateral electric fields producing deflection in retrace interval can last till the scan period of next frame image.Now suppose: in the duration T of a two field picture, comprise retrace interval 401 and frame scan period 402.In a first embodiment, specifically, supposing that the first common electrode 103 keeps common electric voltage, such as, is 0V.In retrace interval 401, in order to formation rule farmland, second common electrode 104 applies drive liquid crystal molecule 301 to make the signal of pre-dumping direction deflection, described signal (being such as 15V) will be greater than the display current potential (being such as 5V) put on pixel electrode 108 relatively, to make the second common electrode 104 generic pixel electrode 108 for noble potential in retrace interval 401, guarantee the formation of lateral electric fields 302 between the two.The pulsewidth putting on the signal on the second common electrode 104 need be greater than the pulsewidth of the sweep signal applied in grid metal lines 201, make lateral electric fields 302 certain time formed, the liquid crystal molecule 301 guaranteeing in pixel region all does the deflection in pre-dumping direction and formation rule farmland.Preferably, retrace interval 401 is the leading portions of the duration T being in a two field picture, and namely described on the second common electrode 104, apply signal be the start time point place appearing at each two field picture.And in frame scan period 402, grid metal lines 201 is applied for the sweep signal of conducting membrane transistor 107, make pixel electrode 108 can obtain drive singal for showing image.Therefore, in a first embodiment, in each two field picture, the drive singal that once can make liquid crystal molecule formation rule farmland is applied with at the second common electrode 104.Like this, as in Figure 10 with each frame for the cycle carries out periodicity repeatedly, described liquid crystal indicator just obtains good display.
In the present invention, the first common electrode 103 remains ground connection (being also namely in 0 current potential), therefore in actual applications, the second common electrode 104 can be connected by an on-off circuit with the first common electrode 103.Concrete operations are: at retrace interval 401, disconnect described on-off circuit, apply signal to the second common electrode 104, produce voltage pulse signal; And in frame scan period 402, on-off circuit described in conducting, ground connection after the second common electrode 104 is connected with the first common electrode 103.But not as limit, in other embodiments, first common electrode 103 and the second common electrode 104 still can be done other and change, such as the first common electrode 103 and the second common electrode 104 are separate, first common electrode 103 ground connection all the time, second common electrode 104 is controlled by a signal control circuit to produce drive singal in the drive mode, and 0 electric potential signal that 402 times the first common electrodes 103 generations of frame scan period are consistent with the second common electrode 104.
Refer to as Figure 11, the sequential chart on the driving method which show liquid crystal indicator of the present invention formation rule farmland in a second embodiment.As shown in figure 11, in the duration T of a two field picture, retrace interval 403 (under drive pattern) and frame scan period 404 is also comprised.But compared with the first embodiment, in a second embodiment, in the duration T of a two field picture, have two retrace intervals 403, namely in the duration T of a two field picture, altogether secondary singal is applied with to the second common electrode 104.Preferably, it is the start time point place appearing at a two field picture that first time applies signal, and second time applies, and appears at the interlude point of a two field picture, like this, relatively can increase the formation time of lateral electric fields.In addition, start time point place at a two field picture, interlude point place at a two field picture, stop providing display data by data line to pixel electrode, signal is being applied to the second common electrode 104, after formation rule farmland, there is provided display data to pixel electrode again, avoid influencing each other between signal.
Compared with the first embodiment, in a second embodiment apply before and after signal, to have occurred secondary to the second common electrode 104, relatively add the formation time of lateral electric fields, the deflection of the liquid crystal molecule within the two field picture time in pixel region in pre-dumping direction can be avoided to produce and degenerate.
In addition, in a second embodiment, first is applied to the second common electrode, the applying of second time signal appears at start time point and the interlude point of a two field picture respectively, but not as limit, the scan period of each two field picture can also be divided into multiple Along ent, at described Along ent place, stop providing display by data line, signal is applied at the second common electrode, such as the applying of signal appears at 1/4th time point places of a two field picture duration for the first time, the applying of second time signal appears at 3/4ths time point places of a two field picture duration, same effect should be had.
It should be noted that, because described regular farmland formation period and described image display time interval are nonoverlapping in time, when the time of display one two field picture is certain, increase the time shared by flyback time, the corresponding minimizing of display mode hypograph display time interval certainly will be caused, therefore, in actual applications, the number of times applying drive singal can be determined according to remaking after actual conditions comprehensive consideration.
Although the present invention discloses as above with preferred embodiment, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (16)
1. a liquid crystal indicator, has first substrate, with described first substrate in the second substrate be oppositely arranged, and is arranged at the liquid crystal layer between described first substrate and described second substrate, comprises:
Be positioned at sweep trace and data line that many mutually insulateds on second substrate intersect, described liquid crystal indicator is divided into multiple pixel region;
Described pixel region comprises pixel switch element and pixel electrode;
Described pixel switch element is electrically connected with described sweep trace, data line and pixel electrode;
First common electrode, is arranged at the inner side of described first substrate relative to second substrate;
Second common electrode, is arranged at the inner side of described second substrate relative to first substrate;
Described second common electrode is positioned at the top of described pixel electrode and insulate with described pixel electrode;
Described second common electrode also comprises through hole, and described through hole and described pixel electrode overlap on the printing opacity direction of liquid crystal display;
Be connected by an on-off circuit between described second common electrode with described first common electrode; Duration of each two field picture comprise frame scan during and retrace interval, described on-off circuit is used for disconnecting at retrace interval, to apply signal to described second common electrode, thus formed between the through hole edge and described pixel electrode of described second common electrode and impel liquid crystal molecule to produce the lateral electric fields deflected; Described on-off circuit, also for conducting during frame scan, is connected with described first common electrode to make described second common electrode.
2. liquid crystal indicator according to claim 1, is characterized in that, also comprises:
Scan line drive circuit, for applying sweep signal to sweep trace;
Data line drive circuit, for applying data-signal to data line.
3. liquid crystal indicator according to claim 1, is characterized in that, described pixel switch element is thin film transistor (TFT), specifically comprises: grid, is electrically connected on sweep trace, for carrying out conducting according to sweep trace or turning off operation; 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 described pixel electrode and described second common electrode, also comprise insulation course.
5. liquid crystal indicator according to claim 3, is characterized in that, the material of described second common electrode is identical with the material of drain electrode with source electrode.
6. liquid crystal indicator as claimed in claim 1, it is characterized in that, wherein, the edge of described through hole flushes with the border of pixel electrode.
7. liquid crystal indicator as claimed in claim 1, is characterized in that, wherein, within the edge of described through hole has at least a part to be positioned at the border of pixel electrode.
8. liquid crystal indicator according to claim 7, is characterized in that, described through hole is square, within any two opposite edges of described through hole or the surrounding lateral margin of through hole are positioned at the border of pixel electrode.
9. liquid crystal indicator according to claim 1, is characterized in that, described second common electrode is linked together by bus outside viewing area.
10. a driving method for the liquid crystal indicator as described in as arbitrary in claim 1-9, comprising:
Within the scan period of each two field picture, signal is applied, for showing image to pixel electrode;
In the retrace interval of each two field picture, signal being applied to described second common electrode, impelling liquid crystal molecule to produce the lateral electric fields deflected for being formed between the through hole edge and described pixel electrode of described second common electrode;
The described lateral electric fields producing deflection in retrace interval lasts till the scan period of next frame image.
The driving method of 11. liquid crystal indicators according to claim 10, it is characterized in that, described within the scan period of each two field picture, signal is applied for showing image to pixel electrode, comprise: common potential is applied, to the pixel electrode in each pixel region applying different display current potentials to the first common electrode.
The driving method of 12. liquid crystal indicators according to claim 11, is characterized in that, the described common potential applied the first common electrode is 0V, is-5V ~+5V to the pixel electrode in each pixel region applying different display current potentials.
The driving method of 13. liquid crystal indicators according to claim 10, it is characterized in that, described in the retrace interval of each two field picture, signal is applied to described second common electrode, impelling liquid crystal molecule to produce the lateral electric fields deflected for being formed between the through hole edge and described pixel electrode of described second common electrode, comprising and a high potential signal higher than display current potential is applied to the second common electrode.
The driving method of 14. liquid crystal indicators according to claim 13, is characterized in that applying an electric potential signal higher than display current potential to the second common electrode is+15V.
The driving method of 15. liquid crystal indicators according to claim 10, is characterized in that, the scan period of each two field picture is divided into multiple Along ent, and at described Along ent place, described data line stops providing signal.
The driving method of 16. liquid crystal indicators according to claim 15, is characterized in that, applies a high potential signal higher than display current potential at the Along ent place of scan period to the second common electrode.
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| CN107229163B (en) * | 2017-06-28 | 2019-12-20 | 昆山龙腾光电有限公司 | Liquid crystal display device with switchable wide and narrow viewing angles and driving method |
| CN107995958B (en) * | 2017-07-04 | 2021-01-15 | 昆山龙腾光电股份有限公司 | Driving method of liquid crystal display device with switchable wide and narrow viewing angles |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469765B1 (en) * | 1999-06-16 | 2002-10-22 | Nec Corporation | Liquid crystal display and method of performing display operation |
| TW200638084A (en) * | 2005-04-25 | 2006-11-01 | Au Optronics Corp | Multi-domain vertically alignment liquid crystal display and driving method thereof |
| JP2007271800A (en) * | 2006-03-30 | 2007-10-18 | Epson Imaging Devices Corp | Liquid crystal panel and liquid crystal display device |
| CN101059608A (en) * | 2006-04-20 | 2007-10-24 | 胜华科技股份有限公司 | Multiple-domain liquid crystal display |
| TW200821665A (en) * | 2006-11-03 | 2008-05-16 | Wintek Corp | Multi-domain liquid crystal display device |
-
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- 2010-10-14 CN CN201010509116.XA patent/CN102445793B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469765B1 (en) * | 1999-06-16 | 2002-10-22 | Nec Corporation | Liquid crystal display and method of performing display operation |
| TW200638084A (en) * | 2005-04-25 | 2006-11-01 | Au Optronics Corp | Multi-domain vertically alignment liquid crystal display and driving method thereof |
| JP2007271800A (en) * | 2006-03-30 | 2007-10-18 | Epson Imaging Devices Corp | Liquid crystal panel and liquid crystal display device |
| CN101059608A (en) * | 2006-04-20 | 2007-10-24 | 胜华科技股份有限公司 | Multiple-domain liquid crystal display |
| TW200821665A (en) * | 2006-11-03 | 2008-05-16 | Wintek Corp | Multi-domain liquid crystal display device |
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