CN102830561B - TFT (Thin Film Transistor) array substrate, LCD (Liquid Crystal Device) and driving method of LCD - Google Patents
TFT (Thin Film Transistor) array substrate, LCD (Liquid Crystal Device) and driving method of LCD Download PDFInfo
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Abstract
The embodiment of the invention provides a TFT (Thin Film Transistor) array substrate, an LCD (Liquid Crystal Device) and a driving method of the LCD, which relate to the technical field of liquid crystal display and solve the problem of large power consumption duet to frequent polar alternating in data line driving. The TFT array substrate comprises multiple grid lines and multiple data lines, wherein the multiple grid lines and the multiple data lines are crisscrossed, the grid lines comprise first grid lines and second grid lines which are arranged at intervals, the data lines comprise odd-line data lines and even-line data lines which are arranged at intervals, the odd-line data lines are connected with first pixel units which are connected with the first grid lines and second pixel units which are connected with the second grid lines, the even-line data lines are connected with third pixel units which are connected with the second grid lines and fourth pixel units which are connected with the first grid lines, the first pixel units and the fourth pixel units in the same pixel line in a grid line direction are connected with the same grid linea, and the second pixel units and the third pixel units are connected with the same grid lines. The embodiment of the invention is used for manufacturing the TFT array substrate.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly relate to a kind of tft array substrate, Liquid Crystal Display And Method For Driving.
Background technology
Thin Film Transistor-LCD (Thin Film Transistor Liquid CrystalDisplay is called for short TFT-LCD) mainly comprises display panels, scan drive circuit and data drive circuit.Wherein, display panels generally by array base palte and color membrane substrates to filling liquid crystal layer and making betwixt after box.Scan drive circuit and data drive circuit are connected with the TFT on-off element on array base palte respectively.
In traditional tft array substrate, a TFT on-off element is controlled by a data line and a grid line, by opening or closing switch element, drives the pixel electrode be connected with this on-off element.When array base palte works, the video data signal in data drive circuit is sent to the source electrode of on-off element by data line, controls the voltage of pixel electrode with this; Scanning drive signal in scan drive circuit is sent to the grid of on-off element by sweep trace, with the opening and closing of this gauge tap element.
In addition, various LCD is the torsion being driven liquid crystal molecule by electric field, makes light selectivity by presenting the image of different gray scale.The electric field driving liquid crystal molecule to reverse is formed between pixel electrode and public electrode.When exceeding Preset Time to the DC voltage being applied for driving liquid crystal between pixel electrode and public electrode, the character of liquid crystal may worsen.Therefore, industry propose comprise frame reversion, row reversion, row reversion or some reversion inversion driving mode.
Wherein, some inversion mode is good with display frame homogeneity, and picture quality is high, and the coupling between circuit is minimum and become the preferred manner of all big enterprises gradually.The reversion of so-called point, be exactly for a certain pixel cell, within the time that picture shows a frame, adopt positive voltage (namely operating voltage is higher than common electric voltage), the time of next frame then adopts negative voltage (namely operating voltage is lower than common electric voltage) to charge to this pixel cell and realizes positive and negative electrode alternately.In addition, owing to can not export the data-signal of same polarity because of source driving chip (Source driver ic) all passages (channel) simultaneously, therefore, in whole liquid crystal panel, in the time of same frame, the polarity of voltage of each pixel cell is contrary with its four pixel cells up and down.
Prior art is for realizing some reversion, continuous reversal data line within the time of same frame is needed to drive the operating voltage of each pixel cell, as shown in Figure 1, operating voltage alternately changing continually between high-low voltage will cause data line driving power consumption to increase, and limit the development and application of large scale liquid crystal display panel.
Summary of the invention
Embodiments of the invention provide a kind of tft array substrate, Liquid Crystal Display And Method For Driving, to solve the polarity problem that frequently alternately power consumption is large when data line drives.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, provide a kind of tft array substrate, comprise many grid lines and a plurality of data lines of transverse and longitudinal intersection; Wherein, grid line comprises spaced first grid line and the second grid line, and data line comprises spaced odd column data line and even column data line; The pixel cell of grid line, data line definition comprises TFT on-off element and pixel electrode;
Odd column data line is connected with the first pixel cell be connected with described first grid line, and the second pixel cell be connected with described second grid line;
Even column data line is connected with the 3rd pixel cell be connected with described second grid line, and the 4th pixel cell be connected with described first grid line;
Wherein, described first pixel cell of the same pixel column on grid line direction is connected same grid line with described 4th pixel cell, and described second pixel cell is connected same grid line with described 3rd pixel cell.
Further, described second pixel cell is adjacent on grid line direction with described 3rd pixel cell.
Or described first pixel cell is adjacent on grid line direction with described 4th pixel cell.
Further, described first grid line and described second grid line are positioned at the both sides of the pixel cell of same pixel column.
On the one hand, provide a kind of liquid crystal display, comprise above-mentioned tft array substrate.
On the one hand, provide a kind of driving method of liquid crystal display, described liquid crystal display comprises above-mentioned tft array substrate;
Described driving method comprises:
Input the data-signal every two scan period reversal of poles to pieces of data line, and the data-signal polarity of adjacent odd column data line and the same time point of even column data line is contrary;
Inputting the first sweep signal to the first grid line accordingly, to open the TFT on-off element of described first pixel cell and described 4th pixel cell, is pixel electrode charging;
Inputting the second sweep signal to the second grid line accordingly, to open the TFT on-off element of described second pixel cell and described 3rd pixel cell, is pixel electrode charging.
The tft array substrate that the embodiment of the present invention provides, Liquid Crystal Display And Method For Driving, odd column data line is connected with the first pixel cell be connected with the first grid line, and the second pixel cell be connected with the second grid line; Even column data line is connected with the 3rd pixel cell be connected with the second grid line, and the 4th pixel cell be connected with the first grid line; On same pixel column, the first pixel cell is connected same grid line with the 4th pixel cell, and the second pixel cell is connected same grid line with the 3rd pixel cell.So, because bar data line every on a pixel column is connected with two pixel cells, therefore under the control of different grid line, pieces of data line can load the data-signal every two scan period reversal of poles, the data-signal polarity of certainly adjacent odd column data line and the same time point of even column data line is contrary.Data line in hinge structure loads the voltage data signal every a scan period reversal of poles, alternating polarity frequency greatly reduces, and then power consumption reduces.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is existing data line load signal polarity schematic diagram;
The structural representation of the tft array substrate that Fig. 2 provides for the embodiment of the present invention;
The data line load signal polarity schematic diagram of Fig. 3 (a) for providing for the embodiment of the present invention; Fig. 3 (b) is array base palte display polarity schematic diagram;
The structural representation of the tft array substrate that Fig. 4 provides for another embodiment of the present invention;
The data line load signal polarity schematic diagram of Fig. 5 (a) for providing for the embodiment of the present invention; Fig. 5 (b) is another array base palte display polarity schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, in each embodiment thereafter, " on ", D score, " left side ",
" right side " just for ease of illustrating and position relationship of definition with reference to accompanying drawing, not to this structure in actual applications position relationship do any restriction.
In addition, in each embodiment thereafter, the pixel cell of grid line, data line definition comprises TFT on-off element and pixel electrode.Data line refers to the connection of pixel cell: data line is electrically connected with the source electrode of pixel cell TFT on-off element.Grid line refers to the connection of pixel cell: grid line is electrically connected with the grid of pixel cell TFT on-off element.The drain electrode of pixel cell TFT on-off element is electrically connected with pixel electrode.
As shown in Figure 2, the tft array substrate 1 that the embodiment of the present invention provides comprises: many grid lines 10 that transverse and longitudinal is intersected and a plurality of data lines 20.Wherein, grid line 10 comprises spaced first grid line 11 and the second grid line 12, and data line comprises spaced odd column data line 21 and even column data line 22.The pixel cell of grid line, data line definition comprises TFT on-off element and pixel electrode.
Wherein, odd column data line 21 is connected with the first pixel cell 31 be connected with the first grid line 11, and the second pixel cell 32 be connected with the second grid line 12.Even column data line 22 is connected with the 3rd pixel cell 33 be connected with the second grid line 12, and the 4th pixel cell 34 be connected with the first grid line 11.First pixel cell 31 of the same pixel column on grid line direction is connected same grid line with the 4th pixel cell 34; Second pixel cell 32 is connected same grid line with the 3rd pixel cell 33.
For the board structure in the upper left corner in Fig. 2, data line 21 is odd column data line, and data line 22 is even column data line, and grid line 11 is the first grid line, and grid line 12 is the second grid line.First grid line 11 and the second grid line 12 center section are called a pixel column, and the first grid line 11 and the second grid line 12 are positioned at the both sides of the pixel cell of same pixel column.Can find out, odd column data line 21 is on this grid line is capable, and left side is connected with the first pixel electrode 31 be connected with the first grid line 11, and right side is connected with the second pixel electrode 32 be connected with the second grid line 12.Even column data line 22 is on this grid line is capable, and left side is connected with the 3rd pixel electrode 33 be connected with the second grid line 12, and right side is connected with four pixel electrode 34 that be connected capable of the first grid line.As can be seen from Figure 2, on same pixel column, the second pixel cell 32 is adjacent on grid line direction with the 3rd pixel cell 33.
Here merely illustrate the structure at substrate one place, the tft array substrate that those skilled in the art can know by inference in the present embodiment is made up of multiple said structure.
Below, the tft array substrate for said structure illustrates the driving method carried out it.
With reference to Fig. 3, input the data-signal every two scan period reversal of poles to pieces of data line, and the data-signal polarity of adjacent odd column data line and the same time point of even column data line is contrary.In figure 3, Ch1, Ch2, Ch3, Ch4 ... represent data cable channel, DE1, DE2, DE3, DE4 ... represent each of some sweep time.For data cable channel Ch1 (the odd column data line 21 in corresponding diagram 2), the data-signal polarity of the DE1 ~ DE6 of input point each sweep time is {+--++-}, can find out that polarity is every two scan period reversal of poles.For data cable channel Ch2 (the even column data line 22 in corresponding diagram 2), the data-signal polarity of DE1 ~ DE6 point each sweep time of input is {-++--+}, not only polarity is every two scan period reversal of poles, and relative data line channel C h1, the data-signal polarity of same time point is also contrary, and this meets the ability of existing source driving chip (Source driver ic).Similar, the data-signal of remainder data line passage also by that analogy, obtains the signal input diagram as shown in Fig. 3 (a).
With the odd column data line 21 of Fig. 2, and the data cable channel Ch1 of Fig. 3 is example, on the first pixel column, owing to being connected with the first pixel electrode 31 be connected with the first grid line 11 on the left of odd column data line 21, therefore the first pixel electrode 31 fills "+" electrode after the first grid line 11 loads cut-in voltage.Again because be connected with the second pixel electrode 32 be connected with the second grid line 12 on this pixel column on the right side of odd column data line 21, therefore the second pixel electrode fills "-" electrode after the second grid line 12 loads cut-in voltage.Similar, the first pixel electrode 31 ' be connected with odd column data line 21 and the first grid line 11 on the second pixel column fills "-" electrode, and the second pixel electrode 32 ' be connected with odd column data line 21 and the second grid line 12 fills "+" electrode.Namely {+--+} signal that dashed region 41 in Fig. 3 (a) represents, array base palte shows as dashed region 41 ' in Fig. 3 (b) represents
With the even column data line 22 of Fig. 2, and the data cable channel Ch2 of Fig. 3 is example, on the first pixel column, owing to being connected with the 4th pixel electrode 34 be connected with the first grid line 11 on the right side of even column data line 22, therefore the 4th pixel electrode 34 fills "-" electrode after the first grid line 11 loads cut-in voltage.Again because be connected with the 3rd pixel electrode 33 be connected with the second grid line 12 on this pixel column on the left of even column data line 22, therefore the 3rd pixel electrode 33 fills "+" electrode after the second grid line 12 loads cut-in voltage.Similar, the 4th pixel electrode 34 ' be connected with even column data line 22 and the first grid line 11 on the second pixel column fills "+" electrode, and the 3rd pixel electrode 33 ' be connected with even column data line 22 and the second grid line 12 fills "-" electrode.Namely {-++-} signal that dashed region 42 in Fig. 3 (a) represents, array base palte shows as dashed region 42 ' in Fig. 3 (b) represents
Combine,
Signal on Ch1, Ch2 in Fig. 3 (a)
Array base palte shows as Fig. 3's (b)
The rule that complete corresponding points overturn can be found out.
Above-mentioned example merely illustrates a part of signal of a part of data line, the data-signal polarity that each sweep time that those skilled in the art can know pieces of data line accordingly by inference puts, and has not repeated them here.
The tft array substrate that the embodiment of the present invention provides and driving method thereof, odd column data line is connected with the first pixel cell be connected with the first grid line, and the second pixel cell be connected with the second grid line; Even column data line is connected with the 3rd pixel cell be connected with the second grid line, and the 4th pixel cell be connected with the first grid line; On same pixel column, the first pixel cell is connected same grid line with the 4th pixel cell, and the second pixel cell is connected same grid line with the 3rd pixel cell.So, because bar data line every on a pixel column is connected with two pixel cells, therefore under the control of different grid line, pieces of data line can load the data-signal every two scan period reversal of poles, the data-signal polarity of certainly adjacent odd column data line and the same time point of even column data line is contrary.Data line in hinge structure loads the voltage data signal every a scan period reversal of poles, alternating polarity frequency greatly reduces, and then power consumption reduces.
In addition, on a pixel column, because every bar data line is all connected with two pixel electrodes, because of for whole panel, decrease the quantity of data line, the aperture opening ratio of pixel can be increased.
The tft array substrate 2 that another embodiment of the present invention provides, as shown in Figure 4, its basic structure is same as the previously described embodiments, and just in the present embodiment, the first pixel cell 31 is adjacent on grid line direction with the 4th pixel cell 34.
With the odd column data line 21 of Fig. 4, and the data cable channel Ch1 of Fig. 5 is example, on the first pixel column, owing to being connected with the first pixel electrode 31 be connected with the first grid line 11 on the right side of odd column data line 21, therefore the first pixel electrode 31 fills "+" electrode after the first grid line 11 loads cut-in voltage.Again because be connected with the second pixel electrode 32 be connected with the second grid line 12 on this pixel column on the left of odd column data line 21, therefore the second pixel electrode fills "-" electrode after the second grid line 12 loads cut-in voltage.Similar, the first pixel electrode 31 ' be connected with odd column data line 21 and the first grid line 11 on the second pixel column fills "-" electrode, and the second pixel electrode 32 ' be connected with odd column data line 21 and the second grid line 12 fills "+" electrode.Namely {+--+} signal that dashed region 51 in Fig. 5 (a) represents, array base palte shows as dashed region 51 ' in Fig. 5 (b) represents
With the even column data line 22 of Fig. 4, and the data cable channel Ch2 of Fig. 5 is example, on the first pixel column, owing to being connected with the 4th pixel electrode 34 be connected with the first grid line 11 on the left of even column data line 22, therefore the 4th pixel electrode 34 fills "-" electrode after the first grid line 11 loads cut-in voltage.Again because be connected with the 3rd pixel electrode 33 be connected with the second grid line 12 on this pixel column on the right side of even column data line 22, therefore the 3rd pixel electrode 33 fills "+" electrode after the second grid line 12 loads cut-in voltage.Similar, the 4th pixel electrode 34 ' be connected with even column data line 22 and the first grid line 11 on the second pixel column fills "+" electrode, and the 3rd pixel electrode 33 ' be connected with even column data line 22 and the second grid line 12 fills "-" electrode.Namely {-++-} signal that dashed region 52 in Fig. 5 (a) represents, array base palte shows as dashed region 52 ' in Fig. 5 (b) represents
Combine, the signal on Ch1, Ch2 in Fig. 5 (a)
Array base palte shows as Fig. 3's (b)
The rule that complete corresponding points overturn can be found out.
Equally, the tft array substrate that the embodiment of the present invention provides and driving method thereof, odd column data line is connected with the first pixel cell be connected with the first grid line, and the second pixel cell be connected with the second grid line; Even column data line is connected with the 3rd pixel cell be connected with the second grid line, and the 4th pixel cell be connected with the first grid line; On same pixel column, the first pixel cell is connected same grid line with the 4th pixel cell, and the second pixel cell is connected same grid line with the 3rd pixel cell.So, because bar data line every on a pixel column is connected with two pixel cells, therefore under the control of different grid line, pieces of data line can load the data-signal every two scan period reversal of poles, the data-signal polarity of certainly adjacent odd column data line and the same time point of even column data line is contrary.Data line in hinge structure loads the voltage data signal every a scan period reversal of poles, alternating polarity frequency greatly reduces, and then power consumption reduces.
In addition, on a pixel column, because every bar data line is all connected with two pixel electrodes, because of for whole panel, decrease the quantity of data line, the aperture opening ratio of pixel can be increased.
The embodiment of the present invention also provides a kind of liquid crystal display, and this liquid crystal display comprises the tft array substrate that above-mentioned any embodiment provides.
Corresponding, for the tft array substrate of different embodiment, the method for driving liquid crystal displays is also identical with the process of above-mentioned driving array base palte, does not repeat them here.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (6)
1. a tft array substrate, comprises many grid lines and a plurality of data lines of transverse and longitudinal intersection; Wherein, grid line comprises spaced first grid line and the second grid line, and data line comprises spaced odd column data line and even column data line; The pixel cell of grid line, data line definition, is characterized in that:
Odd column data line is connected with the first pixel cell be connected with described first grid line, and the second pixel cell be connected with described second grid line;
Even column data line is connected with the 3rd pixel cell be connected with described second grid line, and the 4th pixel cell be connected with described first grid line;
Wherein, described first pixel cell of the same pixel column on grid line direction is connected same grid line with described 4th pixel cell, described second pixel cell is connected same grid line with described 3rd pixel cell, simultaneously described first pixel cell, described second pixel cell, described 3rd pixel cell and be positioned at two middle adjacent pixel unit in described 4th pixel cell and be connected same grid line; And the structure of adjacent two pixel cells is identical on data line direction.
2. substrate according to claim 1, is characterized in that, described second pixel cell is adjacent on grid line direction with described 3rd pixel cell.
3. substrate according to claim 1, is characterized in that, described first pixel cell is adjacent on grid line direction with described 4th pixel cell.
4. the substrate according to claim 1 or 2 or 3, is characterized in that, described first grid line and described second grid line are positioned at the both sides of the pixel cell of same pixel column.
5. a liquid crystal display, is characterized in that, comprises the arbitrary described tft array substrate of claim 1-4.
6. a driving method for liquid crystal display, is characterized in that, described liquid crystal display comprise as arbitrary in claim 1-4 as described in tft array substrate;
Described driving method comprises:
Input the data-signal every two scan period reversal of poles to pieces of data line, and the data-signal polarity of adjacent odd column data line and the same time point of even column data line is contrary;
Inputting the first sweep signal to the first grid line accordingly, to open the TFT on-off element of described first pixel cell and described 4th pixel cell, is pixel electrode charging;
Inputting the second sweep signal to the second grid line accordingly, to open the TFT on-off element of described second pixel cell and described 3rd pixel cell, is pixel electrode charging.
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| CN103456277B (en) * | 2013-08-30 | 2017-02-22 | 合肥京东方光电科技有限公司 | Polarity-reversal driving method and polarity-reversal driving circuit |
| CN104300783B (en) * | 2014-09-22 | 2017-12-08 | 京东方科技集团股份有限公司 | A kind of regulating circuit and array base palte |
| WO2018191910A1 (en) * | 2017-04-20 | 2018-10-25 | Boe Technology Group Co., Ltd. | Liquid crystal display panel, liquid crystal display apparatus and operating method thereof |
| CN107393492A (en) * | 2017-08-01 | 2017-11-24 | 惠科股份有限公司 | Driving method of display device, and computer-readable storage medium |
| KR102372127B1 (en) * | 2017-09-13 | 2022-03-07 | 엘지디스플레이 주식회사 | Array Substrate And Display Device Including The Same |
| CN109616064A (en) * | 2018-12-29 | 2019-04-12 | 惠科股份有限公司 | Driving circuit and driving method of display panel |
| TWI706192B (en) * | 2019-05-17 | 2020-10-01 | 友達光電股份有限公司 | Pixel array substrate |
| CN110197643B (en) * | 2019-07-05 | 2021-03-30 | 京东方科技集团股份有限公司 | Pixel driving circuit and display device |
| CN110806668B (en) * | 2019-11-19 | 2022-07-22 | 京东方科技集团股份有限公司 | Display panel, driving method of display panel and display device |
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