CN101907808B - Active component array substrate and driving method thereof - Google Patents
Active component array substrate and driving method thereof Download PDFInfo
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- CN101907808B CN101907808B CN 201010235626 CN201010235626A CN101907808B CN 101907808 B CN101907808 B CN 101907808B CN 201010235626 CN201010235626 CN 201010235626 CN 201010235626 A CN201010235626 A CN 201010235626A CN 101907808 B CN101907808 B CN 101907808B
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Abstract
The invention provides an active component array substrate, which comprises a plurality of scanning lines, a plurality of data lines and a plurality of pixel units, wherein the plurality of pixel units are respectively connected with corresponding scanning lines and data lines; each pixel unit comprises a first active component, a second active component, a first pixel electrode and a second pixel electrode; the first active component has a first grid, a first source and a first drain, wherein the first source is connected with a corresponding data line; the second active component has a second grid, a second source and a second drain, wherein the first grid and the second grid are connected with the same scanning line; and the first and second pixel electrodes are respectively connected with the first and second drains, wherein the second source of each pixel unit is connected with a first pixel electrode controlled by the next-level scanning line. Besides, the invention also provides a method for driving the active component array substrate. The invention can improve the color offset problem under the condition of not additionally increasing the number of the scanning lines or data lines.
Description
The application is to be on March 5th, 2007 applying date, and name is called " active assembly array substrate and driving method thereof ", and application number is dividing an application of 200710086160.2 application for a patent for invention.
Technical field
The invention relates to a kind of display panels, and particularly relevant for a kind of active assembly array substrate and driving method thereof.
Background technology
Existing market for Thin Film Transistor-LCD (thin film transistor liquid crystaldisplay, performance requirement TFT-LCD) all towards height contrast (high contrast ratio), no GTG reverse (no gray scale inversion), characteristics such as colour cast is little, brightness is high (high luminance), high color richness, high color saturation, rapid reaction and wide viewing angle.Can reach the technology of wide viewing angle requirement at present, comprise that stable twisted nematic liquid crystal (TN) adds view film (wide viewing filn), copline suitching type (in-plane switching, IPS) LCD, limit suitching type (fiingcfield switching) LCD and multidomain vertical alignment type (multi-domain verticallyalignment, MVA) mode such as Thin Film Transistor-LCD.
Be example with existing multi-field vertical assigned LCD panel, because the orientation protrusion (alignment protrusion) or the slit (slit) that are formed on colored optical filtering substrates or the thin-film transistor array base-plate can be so that liquid crystal molecule be multi-direction arrangement, and obtain several different orientation fields (domain), so multi-field vertical assigned LCD panel can be reached the requirement of wide viewing angle.
Fig. 1 is the regular penetrance (normalizedtransmittance) of existing multi-field vertical assigned LCD panel and the graph of a relation of GTG (gray level).Please refer to Fig. 1, horizontal ordinate is GTG, and ordinate is regular penetrance.Because Fig. 1 is as can be known, though the requirement that existing multi-field vertical assigned LCD panel can be reached wide viewing angle, along with the visual angle of observing changes, penetrance has different curvature to the curve (transmittance-level curve) of GTG.In other words, when the visual angle of observing changed, the shown brightness meeting that goes out of existing multiple domain vertical orientation type liquid crystal display changed, and then causes colour cast (color shift) or color saturation deficiency problems such as (color washout).
In order to solve the problem of colour cast, existing multiple prior art is suggested in succession, and wherein a kind of method is that multiform becomes an electric capacity in single pixel cell.Utilize capacity coupled mode to make the different pixels electrode in the single pixel cell produce the electric field of different sizes respectively, and then allow the liquid crystal molecule of different pixels electrode top that different arrangements is arranged.Though this kind mode can be improved color offset phenomenon, the shortcoming that but causes display quality to descend because capacitance-resistance sluggishness (RC delay) effect is arranged.
Another kind method is to increase a transistor in each pixel cell.That is to say, have two transistors in the single pixel cell.Make two pixel electrodes in single pixel cell produce different electric fields by these two transistors, and then allow the liquid crystal molecule of different pixels electrode top that different arrangements is arranged, to reach the purpose of improving colour cast.Yet this practice need form two transistors in single pixel cell, and needs to increase the number of sweep trace or data line, so the method not only increases the complexity of driving circuit, and can make cost of manufacture higher.
Other prior art of improving color offset phenomenon also is suggested in succession, as US 6,486, and 930, US6,933,910, US 2005/0200788 etc.Be example with US 2005/0200788, though the pixel cell array architecture that this application case proposes can be under the situation that does not additionally increase sweep trace or data line quantity, improve the colour cast problem, but, this application case must cooperate complicated driving method, can make two pixel electrodes in the single pixel cell produce different electric fields.In more detail, in US2005/0200788, owing to desire to input to data-signal and the discontinuous output of same pixel cell, therefore, this application case must additionally arrange storer in driving circuit, with just output after the order of data output voltage is reformed (reorder), so design not only can increase the complexity that signal is handled, and can increase the manufacturing cost of driving circuit.
Summary of the invention
In view of this, the present invention proposes a kind of active assembly array substrate (active device arraysubstrate), and it can improve the colour cast problem under the situation of the complexity that increases driving circuit not significantly.
The present invention proposes a kind of driving method in addition, and it is suitable for driving the LCD with above-mentioned active assembly array substrate.
For specifically describing content of the present invention, at this a kind of active assembly array substrate is proposed, it comprises multi-strip scanning line, many data lines and a plurality of pixel cell.Wherein, a plurality of pixel cells are connected with corresponding scanning line and data line respectively, and each pixel cell comprises one first driving component, one second driving component, one first pixel electrode and one second pixel electrode.First driving component has a first grid, one first source electrode and one first drain electrode, and wherein first source electrode is connected with corresponding data line.Second driving component has a second grid, one second source electrode and one second drain electrode, and wherein first grid and second grid are connected with same sweep trace.First pixel electrode is connected with first drain electrode.Second pixel electrode is connected with second drain electrode, and wherein second source electrode in each pixel cell is connected with first pixel electrode that back one-level sweep trace is controlled.Wherein first pixel electrode and second pixel electrode are between adjacent sweep trace and adjacent data line.
In one embodiment of this invention, first pixel electrode equates in fact with the area of second pixel electrode.
In one embodiment of this invention, driving component comprises a thin film transistor (TFT), and thin film transistor (TFT) for example is an amorphous silicon film transistor or a polycrystalline SiTFT.
In one embodiment of this invention, first pixel electrode in the pixel cell of same row is in alignment with each other at column direction.In other embodiments, second pixel electrode in the pixel cell of same row is in alignment with each other at column direction.
In one embodiment of this invention, in the pixel cell of same row, part first pixel electrode that is connected with even number bar data line is in alignment with each other at column direction, and part first pixel electrode that is connected with odd number bar data line is in alignment with each other at column direction.
In one embodiment of this invention, the area of the area of first pixel electrode that is connected with even number bar data line and first pixel electrode that is connected with odd number bar data line is unequal in fact.
In one embodiment of this invention, first driving component and second driving component are positioned at the homonymy of connected sweep trace.
The present invention proposes a kind of driving method in addition, is suitable for driving a display panels with above-mentioned active assembly array substrate, and this driving method comprises opens sweep trace in regular turn, in regular turn data-signal is write the pixel cell that is positioned at different lines.The method that data-signal is write each pixel cell comprises the following steps.At first, the sweep trace of the sweep trace that unlatching simultaneously is connected with pixel cell and back one-level is to write data-signal second pixel electrode.Then, close the sweep trace of the sweep trace that is connected with pixel cell and back one-level in regular turn, data-signal is write first pixel electrode.
In one embodiment of this invention, when the sweep trace of the sweep trace that is connected with pixel cell and back one-level when opening simultaneously, the data-signal of importing is P1, when the sweep trace of back one-level is closed and during the sweep trace unlatching that is connected with pixel cell, the data-signal of importing is P2, and P1 ≠ P2.
Based on above-mentioned, the present invention can improve the colour cast problem under the situation that does not additionally increase sweep trace or data line quantity.In addition, active assembly array substrate proposed by the invention does not need the repeated order of excessive data signal to handle (Data Reorder) on driving, and driving method complexity therefore proposed by the invention is low, and can be so that cost of manufacture reduces.
Description of drawings
Fig. 1 is the regular penetrance of existing multi-field vertical assigned LCD panel and the graph of a relation of GTG.
Fig. 2 A is the synoptic diagram of a kind of active assembly array substrate of the present invention.
Fig. 2 B is the synoptic diagram of the another kind of active assembly array substrate of the present invention.
Fig. 2 C is the synoptic diagram of another active assembly array substrate of the present invention.
Fig. 2 D is the synoptic diagram of another active assembly array substrate of the present invention.
Fig. 3 is a kind of in order to drive the drive waveforms synoptic diagram of display panels for the present invention.
Fig. 4 is the synoptic diagram of a kind of display panels of the present invention.
Fig. 5 is the synoptic diagram of the another kind of display panels of the present invention.
Drawing reference numeral:
20: active assembly array substrate 200: pixel cell
210: sweep trace 210 ': back one-level sweep trace
220: 230: the first driving components of data line
232: 234: the first source electrodes of first grid
240: the second driving components of drain electrode in 236: the first
242: 244: the second source electrodes of second grid
250: the first pixel electrodes of drain electrode in 246: the second
260: the second pixel electrodes 300,400: display panels
P1, P2: data-signal D: dark space
B: clear zone S1, S2 ..., SN-1, SN: scan signal
Embodiment
For above-mentioned feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Fig. 2 A is the synoptic diagram of a kind of active assembly array substrate of the present invention.Please refer to Fig. 2 A, present embodiment only shows two pixel cells 200 in the active assembly array substrate 20 with as illustrative purposes.By Fig. 2 A as can be known, active assembly array substrate 20 comprises multi-strip scanning line 210, many data lines 220 and a plurality of pixel cells 200.Wherein, a plurality of pixel cells 200 are connected with corresponding scanning line 210 and data line 220 respectively, and each pixel cell 200 comprises one first driving component 230, one second driving component 240, one first pixel electrode 250 and one second pixel electrode 260.In the present embodiment, first driving component 230 and second driving component 240 for example are the amorphous silicon membrane transistors, yet first driving component 230 and second driving component 240 also can be the switchs (switch) of polycrystalline SiTFT or other form kenel.In addition, in the present embodiment, first driving component 230 and second driving component 240 are the homonymies that are positioned at connected sweep trace 210, but the present invention is not as limit.
Please continue the A with reference to Fig. 2, first driving component 230 has a first grid 232, one first source electrode 234 and one first drain electrode 236.Second driving component 240 has a second grid 242, one second source electrode 244 and one second drain electrode 246.By Fig. 2 A as can be known, first grid 232 and second grid 242 are connected with same sweep trace 210, and first pixel electrode 250 is connected with first drain electrode 236, and second pixel electrode 260 is connected with second drain electrode 246.Wherein, second source electrode 244 in each pixel cell 200 can be connected with first pixel electrode 250 that back one-level sweep trace 210 ' is controlled.In more detail, in each pixel cell 200, second source electrode 244 can be directly to be connected with first pixel electrode 250 that back one-level sweep trace 210 ' is controlled by contact openings (contactopening).Certainly, in each pixel cell 200, second source electrode 244 also can be to electrically connect with first pixel electrode 250 by other cabling (for example, first drain electrode 236 that is connected with first pixel electrode 250 that back one-level sweep trace 210 ' is controlled).
It should be noted that the present invention can adjust the area ratio of first pixel electrode 250 and second pixel electrode 260 in each pixel cell 200, so that suppress the best resultsization of colour cast.For example, in Fig. 2 A, first pixel electrode 250 can be to equate in fact with the area of second pixel electrode 260, but the demand of also can looking is adjusted into bigger zone with the area of first pixel electrode 250, shown in Fig. 2 B.In addition, the present invention also can select the area of second pixel electrode 260 is adjusted into bigger zone, shown in Fig. 2 C.In each pixel cell 200, the area ratio viewable design demand of first pixel electrode 250 and second pixel electrode 260 and do suitable change, the present invention does not limit layout type and the area ratio of pixel electrode.
By Fig. 2 B and Fig. 2 C as can be known, first pixel electrode 250 in the pixel cell 200 of same row is in alignment with each other in column direction, and second pixel electrode 260 in the pixel cell 200 of same row also is in alignment with each other on column direction.Certainly, in other embodiments, the pixel cell 200 of same row also can be to have only first pixel electrode 250 or second pixel electrode 260 to be in alignment with each other on column direction.
On practice, except suppressing the considering of colour cast effect, the deviser still needs and considers the different area ratio for the influence of the charging ability of liquid crystal coupling capacitance effect and driving component.In more detail, the area of first pixel electrode 250 controlled of the charging ability of second pixel electrode 260 and back one-level sweep trace 210 ' is relevant.For example, in pixel cell 200, when the area of first pixel electrode 250 bigger, and the area of second pixel electrode 260 hour (shown in Fig. 2 B), the coupling capacitance of pixel cell 200 is less.In the case, need usually to use the first preferable driving component 230 of charging ability, so that second pixel electrode 260 can charge smoothly.
In Fig. 2 C, in pixel cell 200, less when the area of first pixel electrode 250, and the area of second pixel electrode 260 is when big, though the coupling capacitance of pixel cell 200 can be gone increase slightly, this design will be conducive to the charging of second pixel electrode 260.Hold above-mentionedly, the deviser can select suitable area ratio (i.e. the area ratio of first pixel electrode 250 and second pixel electrode 260) at the design requirement of different LCD.
Fig. 2 D is the synoptic diagram of another active assembly array substrate of the present invention.Please refer to Fig. 2 D, in the pixel cell 200 of same row, the part that is connected with even number bar data line 220 first pixel electrode 250 is in alignment with each other at column direction, and the part that is connected with odd number bar data line 220 first pixel electrode 250 is in alignment with each other at column direction.In the present embodiment, the area of first pixel electrode 250 that is connected with even number bar data line 220 is less, and the area of first pixel electrode 250 that is connected with odd number bar data line 220 is bigger.Yet in other embodiments, also can make the area of first pixel electrode 250 that is connected with even number bar data line 220 bigger, and the area of first pixel electrode 250 that is connected with odd number bar data line 220 is less.
Fig. 3 is a kind of drive waveforms synoptic diagram that has the display panels of above-mentioned active assembly array substrate in order to driving.Please be simultaneously with reference to Fig. 2 A and Fig. 3, driving method of the present invention comprises by sweep signal S
1, S
2..., S
N-1And S
N Open sweep trace 210 in regular turn, in regular turn data-signal P1, P2 are write the pixel cell 200 that is positioned at different lines by data line.General sweep signal has two kinds of voltage level V
GhWith V
G1, when the voltage level of sweep signal is V
GhThe time, sweep trace 210 is unlocked, when the voltage level of sweep signal is V
G1The time, sweep trace 210 namely is closed.Particularly, the method that data-signal is write each pixel cell 200 comprises the following steps.At first, the sweep trace 210 ' of the sweep trace 210 that unlatching simultaneously is connected with pixel cell 200 and back one-level writes second pixel electrode 260 with the data-signal P1 that data line 220 is transmitted.Then close the sweep trace 210 ' of back one-level, when after the sweep trace 210 ' of one-level close, when the sweep trace 210 that is connected with pixel cell 200 is still opened, at this moment, the data-signal P2 that data line 220 transmits can be written into first pixel electrode 250, then closes the sweep trace 210 that is connected with pixel cell 200.Wherein to be different from data-signal P2 (be P1 ≠ P2) to data-signal P1.
As shown in Figure 3, because the data-signal P1, the P2 that desire to input in the same pixel cell export continuously, therefore, do not need again through the sequential of data-signal reform (Data Reorder) from each data-signal of data line 200.Hold above-mentioned, the design that the present invention can simplified driving circuit, and reduce manufacturing cost.
Fig. 4 is a kind of demonstration synoptic diagram of display panels.Please refer to 4, display panels 300 has the active assembly array substrate shown in Fig. 2 B.When data-signal P1 and data-signal P2 (being illustrated in Fig. 3) are written in second pixel electrode 260 and first pixel electrode 250 respectively, display panels 300 can present the different dark space D of brightness and clear zone B, and the color offset phenomenon that the different dark space D of these brightness and clear zone B can improve display panels 300.In Fig. 4, the dark space D that controls by same sweep trace 210 can be in alignment with each other in column direction, and the clear zone B that controls by same sweep trace 210 also can be in alignment with each other in column direction.Yet the present invention does not limit the layout type of dark space D and clear zone B in the display panels 300, and the present invention also can adopt the layout type that illustrates as Fig. 5.
Based on above-mentioned, the different driving components that the present invention adopts same sweep trace to control drive the different pixels electrode in the same pixel cell, and the source electrode of one driving component is connected with the sweep trace of back one-level, the zone that therefore can present two kinds of different brightness in same pixel cell, the color offset phenomenon that produces along with the change of observation visual angle can be improved.Simultaneously, cooperate the driving method of in regular turn sweep trace being opened, do not need the sequential reforming step of excessive data signal the pixel cell of different lines in the display panels can be write data-signal in regular turn, improve the colour cast problem, therefore driving method complexity used in the present invention is low, has the advantage of saving the circuit memory space and saving cost of manufacture.
Though the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion as the claim person of defining that look.
Claims (11)
1. an active assembly array substrate is characterized in that, this active assembly array substrate comprises:
The multi-strip scanning line;
Many data lines;
A plurality of pixel cells be connected with corresponding scanning line and data line respectively, and each pixel cell comprise:
One first driving component has a first grid, one first source electrode and one first drain electrode, and wherein this first source electrode is connected with corresponding data line;
One second driving component has a second grid, one second source electrode and one second drain electrode, and wherein said first grid and this second grid are connected with same sweep trace;
One first pixel electrode is connected with described first drain electrode; And
One second pixel electrode is connected with described second drain electrode,
Wherein first pixel electrode of the adjacent pixel unit controlled of described second source electrode in each pixel cell and back one-level sweep trace is connected,
Wherein said first pixel electrode and described second pixel electrode are between adjacent sweep trace and adjacent data line.
2. active assembly array substrate as claimed in claim 1 is characterized in that, described first pixel electrode equates in fact with the area of described second pixel electrode.
3. active assembly array substrate as claimed in claim 1 is characterized in that, described driving component comprises a thin film transistor (TFT).
4. active assembly array substrate as claimed in claim 3 is characterized in that, described thin film transistor (TFT) is an amorphous silicon film transistor or a polycrystalline SiTFT.
5. active assembly array substrate as claimed in claim 1 is characterized in that, in the pixel cell of same row, described first pixel electrode is in alignment with each other at column direction.
6. active assembly array substrate as claimed in claim 5 is characterized in that, in the pixel cell of same row, described second pixel electrode is in alignment with each other at column direction.
7. active assembly array substrate as claimed in claim 1, it is characterized in that, in the pixel cell of same row, described first pixel electrode of part that is connected with even number bar data line is in alignment with each other at column direction, and described first pixel electrode of part that is connected with odd number bar data line is in alignment with each other at column direction.
8. active assembly array substrate as claimed in claim 7 is characterized in that, the area of the area of described first pixel electrode that is connected with even number bar data line and described first pixel electrode that is connected with odd number bar data line is unequal in fact.
9. active assembly array substrate as claimed in claim 1 is characterized in that, described first driving component and described second driving component are positioned at the homonymy of connected sweep trace.
10. a method that drives a display panels is characterized in that described display panels has the described active assembly array substrate of claim 1, and this driving method comprises:
Open described sweep trace in regular turn, in regular turn data-signal is write the described pixel cell that is positioned at different lines, the method that wherein data-signal is write each pixel cell comprises:
The sweep trace of the sweep trace that unlatching simultaneously is connected with described pixel cell and back one-level is to write a data-signal described second pixel electrode; And
Close the sweep trace of described back one-level and the sweep trace that is connected with described pixel cell in regular turn, another data-signal is write described first pixel electrode.
11. the method for driving one display panels as claimed in claim 10, it is characterized in that, when the sweep trace of the sweep trace that is connected with described pixel cell and described back one-level is opened simultaneously, the described data-signal that writes is P1, when the sweep trace of this back one-level is closed earlier and the sweep trace that is connected with this pixel cell when still opening, another data-signal that writes is P2, and P1 ≠ P2.
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| CN 201010235626 CN101907808B (en) | 2007-03-05 | 2007-03-05 | Active component array substrate and driving method thereof |
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| CN 200710086160 Division CN101021660A (en) | 2007-03-05 | 2007-03-05 | Active assembly array substrate and driving method thereof |
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| CN101907808B true CN101907808B (en) | 2013-10-02 |
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| CN103745698B (en) * | 2013-12-20 | 2016-01-20 | 深圳市华星光电技术有限公司 | A kind of color offset compensating method of display panels and system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6335778B1 (en) * | 1996-08-28 | 2002-01-01 | Sharp Kabushiki Kaisha | Active matrix type liquid crystal display device using driver circuits which latch-in data during horizontal blanking period |
| CN1357872A (en) * | 2000-12-07 | 2002-07-10 | 国际商业机器公司 | Image display unit, image display equipment and image display unit driving method |
| JP5265045B2 (en) * | 2012-10-12 | 2013-08-14 | ホーユー株式会社 | Hair cosmetic composition, hair cosmetic product and method of using hair cosmetic composition |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6335778B1 (en) * | 1996-08-28 | 2002-01-01 | Sharp Kabushiki Kaisha | Active matrix type liquid crystal display device using driver circuits which latch-in data during horizontal blanking period |
| CN1357872A (en) * | 2000-12-07 | 2002-07-10 | 国际商业机器公司 | Image display unit, image display equipment and image display unit driving method |
| JP5265045B2 (en) * | 2012-10-12 | 2013-08-14 | ホーユー株式会社 | Hair cosmetic composition, hair cosmetic product and method of using hair cosmetic composition |
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