CN101714339A - High-efficiency liquid crystal display panel - Google Patents
High-efficiency liquid crystal display panel Download PDFInfo
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- CN101714339A CN101714339A CN200810216409A CN200810216409A CN101714339A CN 101714339 A CN101714339 A CN 101714339A CN 200810216409 A CN200810216409 A CN 200810216409A CN 200810216409 A CN200810216409 A CN 200810216409A CN 101714339 A CN101714339 A CN 101714339A
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Abstract
The invention discloses a high-efficiency liquid crystal display panel which comprises a plurality of rows of pixel units, and each row of pixel units comprise two rows of plural pixels and a data line, wherein the data line is connected with a source electrode chip and two rows of pixels of each row of pixel units, can transmit data signals to each pixel from the source electrode chip and is arranged between two rows of pixels in each row of pixel units; and each pixel receives an alternating current (AC) signal and controls the displayed gray scale brightness according to data signals. In addition, the high-efficiency liquid crystal display panel comprises a plurality of compensation lines connected with the source electrode chip, and each compensation line transmits compensation signals and is arranged between adjacent pixel units, wherein the compensation signals can compensate coupling voltage caused by the data signals in each pixel to the AC signals. The high-efficiency liquid crystal display panel can overcome a crosstalk phenomenon of line inversion of the panel via the compensation signals.
Description
Technical field
The present invention is relevant a kind of display panels, particularly about a kind of high-efficiency liquid crystal display panel.
Background technology
In the LCD (LCD) of active-matrix formula, each picture element has a thin film transistor (TFT) (TFT), and its grid is connected to the scanning linear of horizontal direction, and drain is connected to the data line of vertical direction, and source electrode then is connected to pixel electrode.
In the horizontal direction same scans online, the grid of all TFT all links together, so apply voltage is interlock, if scan the online enough big positive voltage that applies at a certain, then this scans online all TFT and all can be opened, and this moment, this scanned online pixel electrode, can be connected with the data line of vertical direction, and send into corresponding video signal via the vertical data line, pixel electrode is charged to suitable voltage.Then apply enough big negative voltage, close TFT,, make electric charge be kept on the liquid crystal capacitance therebetween up to the next time of write signal again again; Restart a horizontal scanning linear this moment, sends into its corresponding video signal.Video signal data with whole image writes so in regular turn, more again from article one write signal again, more than is the basic operation mode of display panels.
Because liquid crystal molecule also has a specific character, it is constant, not so of long duration to be fixed on some voltage exactly always, even voltage is canceled, liquid crystal molecule can can't rotate in response to the variation of electric field because of the destruction of characteristic again, to form different GTGs.So at set intervals, just voltage must be restored to the original state, be destroyed with the characteristic of avoiding liquid crystal molecule.
If but picture is motionless always, what if that is to say when picture shows same GTG always? so the display voltage in the LCD just has been divided into two kinds of polarity, one is positive polarity, and another is a negative polarity.When the voltage of pixel electrode is higher than jointly (common) electrode voltage, just be referred to as positive polarity.And when the voltage of pixel electrode is lower than the voltage of common electrode, just be referred to as negative polarity.No matter be positive polarity or negative polarity, the GTG of one group of same brightness can be arranged all.So when the pressure reduction absolute value of layer glass up and down is fixedly the time, regardless of being the voltage height of pixel electrode, or the voltage height of common electrode, the GTG that is showed is living.But under the both of these case, turning to of liquid crystal molecule but is opposite fully, also just can avoid above-mentioned and turn to when being fixed on a direction characteristic destruction of being caused when liquid crystal molecule always.That is to say, when display frame is motionless always, still can by positive-negative polarity do not stop alternately, it is motionless to reach display frame, simultaneously the liquid crystal molecule result of characteristic that is not destroyed.
Fig. 1 to Fig. 4 is exactly the mapping mode of the various opposed polarities of panel, though so multiple conversion regime is arranged, they have a common point, all are to change polarity when changing picture data next time.With the renewal frequency of 60 hertz (Hz), that is the polarity of per 16 milliseconds (ms) change one subframe.That is to say that for same point, its polarity is the conversion that do not stop.And whether adjacent point has identical polarity, and that can just decide according to different polar switching modes.At first be frame counter-rotating (frame inversion) as shown in Figure 1, all adjacent points of its whole image all are to have identical polarity; As Fig. 2 and Fig. 3 line counter-rotating (line inversion) shown in respectively and row counter-rotating (columninversion) then each comfortable adjacent row have identical polarity with listing; Point counter-rotating (dot inversion) as shown in Figure 4 in addition then is each point and own adjacent four points up and down, is different polarity.
Please consult Fig. 5 and Fig. 6 simultaneously, Fig. 5 is the display panels synoptic diagram of prior art, and Fig. 6 is the oscillogram of the common signal and the data-signal of prior art, the common signal (V among the figure
COM) be common electrode voltage, when the polar switching mode be line counter-rotating and all data lines 16 data-signal (SO1 ..., SO1200) voltage quasi position when being high levle, if common signal is to be alternating voltage, because the influence of the stray capacitance in the thin film transistor (TFT) 20, then this moment, common signal can be pulled to a high voltage by moment, subsequently again because common signal own is held a fixed voltage, so can slowly drop to this fixed voltage, when all data-signals (SO1 ..., SO1200) voltage quasi position when being low level, common signal also has similar situation and takes place.This moment rises or descends is exactly the voltage coupling effect of data-signal in 22 pairs of common signals of liquid crystal picture element electric capacity, and this effect can make panel produce serious cross-talk (crosstalk) phenomenon.
In addition, please consult Fig. 5 and Fig. 7 simultaneously, Fig. 7 is the driving voltage waveform figure of the liquid crystal picture element electric capacity of prior art, V0-V7 among Fig. 7 is the voltage of the pixel electrode of the liquid crystal picture element electric capacity 22 among Fig. 5, this pixel electrode system connects the drain of thin film transistor (TFT) 20, and the common signal among Fig. 7 is the voltage of the common electrode of the liquid crystal picture element electric capacity 22 among Fig. 5, and this common electrode is the electrode of the other end of liquid crystal picture element electric capacity 22.When the polar switching mode is the line counter-rotating, if common signal is a DC voltage, as long as then source electrode chip 12 can be charged to the voltage of pixel electrode than common signal is big and just can obtain positive polarity, just can obtain negative polarity than common signal is little, but this kind mode is just because of common signal is a DC voltage, so the power consumption that produces is also bigger, very power consumption, can't energy savings, and processing procedure and circuit complexity are also higher, and therefore cost also improves.
Therefore, the present invention ties up at above-mentioned puzzlement, proposes a kind of high-efficiency liquid crystal display panel, and it is the cross-talk phenomenon that not only can solve the line counter-rotating in the polar switching mode, can reduce the electric cost that makes the user again.
Summary of the invention
The present invention's fundamental purpose is to provide a kind of high-efficiency liquid crystal display panel, and it is can be by compensating signal to solve cross-talk (crosstalk) phenomenon of the line counter-rotating in the panel polar switching mode.
Another object of the present invention is to provide a kind of high-efficiency liquid crystal display panel, and it is to utilize two thin film transistor (TFT)s to share the connected mode of same data line, to reduce the manufacturing cost of source electrode chip.
The present invention's a purpose again is to provide a kind of high-efficiency liquid crystal display panel, and it is to reduce the electric cost that makes the user.
For reaching above-mentioned purpose, the invention provides a kind of high-efficiency liquid crystal display panel, comprise plural number row picture element unit, each row picture element unit comprises two plural picture element of row and data lines, the data linear system connects two row picture elements in source electrode chip and each the row picture element unit, and can from source electrode chip with data signal transmission to each picture element, be located at again between the two row picture elements in each row picture element unit, each picture element has the AC signal of reception, and according to the shown GTG brightness of data-signal control, the plural compensating line that connects source electrode chip is arranged in addition, each bar compensation linear system transmission compensating signal also is located between the adjacent lines picture element unit, the coupled voltages that compensating signal can the offset data signal causes AC signal in each picture element.
The present invention also provides a kind of driving method of high-efficiency liquid crystal display panel, at first provide AC signal to plural picture element, then liquid crystal picture element electric capacity and the thin film transistor (TFT) in the picture element receives AC signal and data-signal respectively, transistor discharges and recharges according to data-signal control liquid crystal picture element electric capacity, and then make its reversal of poles, the coupled voltages that another compensating signal can cause AC signal in each liquid crystal picture element capacitance compensation data-signal.
The present invention not only can solve the cross-talk phenomenon of the line counter-rotating in the polar switching mode, can reduce the electric cost that makes the user again, is a quite practical invention.
Description of drawings
Fig. 1 to Fig. 4 is the polar switching synoptic diagram of the panel of prior art.
Fig. 5 is the display panels synoptic diagram of prior art.
Fig. 6 is the oscillogram of the common signal and the data-signal of prior art.
Fig. 7 is the driving voltage waveform figure of the liquid crystal picture element electric capacity of prior art.
Fig. 8 and Fig. 9 are the present invention's display panels synoptic diagram.
Figure 10 is the oscillogram of the present invention's common signal, compensating signal and data-signal.
Figure 11 is the present invention's display panels polar switching synoptic diagram.
Figure 12 is the comparison oscillogram of the present invention's common signal, compensating signal and data-signal.
Figure 13 is the driving voltage waveform figure of the present invention's liquid crystal picture element electric capacity.
The primary clustering symbol description is as follows:
10 panels, 12 source electrode chip
14 grid chips, 16 data lines
18 scanning linears, 20 thin film transistor (TFT)s
22 liquid crystal picture element electric capacity, 24 compensating lines
26 source electrode chip, 28 grid chips
30 scanning linears, 32 data lines
34 compensating lines, 36 row picture element unit
38 picture elements, 40 thin film transistor (TFT)s
42 liquid crystal picture element electric capacity, 44 panels
Embodiment
Now by making your juror further understanding and understanding more be arranged to the present invention's architectural feature and the effect of being reached, sincerely help with preferable enforcement illustration and cooperate detailed explanation, illustrate as the back:
See also Fig. 8, the present invention comprises the source electrode chip 26 that is used for producing a data-signal and a compensating signal, generation one scans the grid chip 28 and plural number row picture element unit 36 of signal, each row picture element unit 36 comprises two plural picture element 38 of row and data lines 32, data line 32 is to connect source electrode chip 26, with two row picture elements 38 in each row picture element unit 36, be located at again between the two row picture elements 38 in each row picture element unit 36, but data line 32 transmission of data signals are to each picture element 36, the plural number scanning linear then connects grid chip 28 and plural picture element 38, and transmission scans signal to picture element 38, picture element 38 is to receive an AC signal and data-signal in addition, and this AC signal is called common signal (V
COM), scanning each picture element 38 of signal may command and receive data-signal, picture element 38 is then according to the shown GTG brightness of data-signal control.
Please consult Fig. 9 simultaneously, each picture element 38 comprises a thin film transistor (TFT) 40 and a liquid crystal picture element electric capacity 42, the source electrode of thin film transistor (TFT) 40 connects data line 32, its grid connects a scanning linear 30, its drain connects the pixel electrode of liquid crystal picture element electric capacity 42, the other end electrode of liquid crystal picture element electric capacity 42 is a common electrode, be used for receiving AC signal, thin film transistor (TFT) 40 is to receive data-signal and scan signal, scan the on off state of signal may command thin film transistor (TFT) 40, make transistor 40 discharging and recharging according to data-signal control liquid crystal picture element electric capacity 42, and then make its reversal of poles, and the coupled voltages that compensating signal can the offset data signal causes AC signal in liquid crystal picture element electric capacity 42.
Above-mentioned data-signal is an alternating current, and it is opposite with AC signal polarity, so just can make the reversal of poles of liquid crystal picture element electric capacity 42, and then make picture element 38 produce enough GTG brightness, compensating signal is an alternating current in addition, not only identical with AC signal polarity, opposite with data-signal polarity again, and the voltage quasi position of compensating signal is required to be the average voltage of data-signal, so the compensating signal coupled voltages that just can cause common signal in the accurate offset data signal of each liquid crystal picture element electric capacity.
Fig. 5 of Fig. 9 and prior art relatively after, find that the present invention's the thin film transistor (TFT) 40 and the connection of data line 32 can make data line 32 reduce by one times quantity, the quantity of data line 32 can influence the circuit structure of source electrode chip 26, so the present invention can reduce the manufacturing cost of source electrode chip 26.
Please consult Fig. 8 simultaneously, Fig. 9, Figure 10, signal start process with the display panel of understanding the present invention, the liquid crystal picture element electric capacity 42 of one AC signal to each picture element 38 at first is provided, then source electrode chip 26 can see through data line 32 data signal to each thin film transistor (TFT) 40, data-signal is opposite with the polarity of AC signal, so just can make picture element 38 reach enough GTG brightness, grid chip 28 then sees through scanning linear 30 transmission from top to bottom in regular turn and scans signal to each thin film transistor (TFT) 40, scan the on off state of signal may command thin film transistor (TFT) 40, make transistor 40 discharging and recharging according to data-signal control liquid crystal picture element electric capacity 42, yet, in source electrode chip 26 data signal, also see through compensating line 34 and transmit compensating signal, the compensating signal not only polarity with AC signal is identical, opposite with data-signal polarity again, like this compensating signal coupled voltages that just can cause AC signal in each liquid crystal picture element electric capacity 42 offset data signal, this AC signal is common signal (V just
COM), shown in common signal, when data-signal (SO1 ..., SO1200) reduce to low level from high levle moment, or when rising to high levle from low level moment, common signal is still unaffected, such operation can make the polar switching mode of panel under the state that presents the line conversion, solves the generation of cross-talk (crosstalk) phenomenon.
Please consult Fig. 9 simultaneously, Figure 11, polar switching process with the display panel of understanding the present invention, Figure 11 is the polar switching synoptic diagram of the present invention's display panels, the all thin film transistor (TFT) 40 and liquid crystal picture element electric capacity 42 of relative position in the corresponding diagram 9 of each square block of panel 44 among this figure, each rectangle block is the compensating line 34 of corresponding relative position then, at first, when 30 starts of article one scanning linear, and data-signal is a positive polarity, when compensating signal is negative polarity, article one, the thin film transistor (TFT) 40 that connected of scanning linear 30 can be opened, and the polarity of the liquid crystal picture element electric capacity 42 of its connection is positive polarity, the square block of the relative position of therefore corresponding this liquid crystal picture element electric capacity 42 is a positive polarity, the rectangle block of the relative position of corresponding compensating line 34 is a negative polarity, then, when 30 starts of second scanning linear, and data-signal is a negative polarity, when compensating signal is positive polarity, the thin film transistor (TFT) 40 that second scanning linear 30 is connected can be opened, and the polarity of the liquid crystal picture element electric capacity 42 of its connection is negative polarity, the square block of the relative position of therefore corresponding this liquid crystal picture element electric capacity 42 is a negative polarity, the rectangle block of the relative position of corresponding compensating line 34 is a positive polarity, because scanning linear 30 is down to sweep in regular turn from last, therefore since the 3rd scanning linear 30, all show corresponding polar switching mode with aforesaid way, yet, such operation can make the polar switching mode of panel 44 under the state that presents the line conversion, solves the generation of cross-talk phenomenon.
Please consult Fig. 8 simultaneously, Fig. 9, Figure 12, common with the display panel of understanding the present invention, data, the compensating signal different wave shape, signal among the figure on each bar data line 32 all is the same, so only with the SO1 designate data signal, and in oscillogram, can find, the voltage quasi position of compensating signal is required to be the average voltage of data-signal, and the compensating signal not only polarity with AC signal is identical, opposite with data-signal polarity again, like this compensating signal coupled voltages that just can cause common signal in each liquid crystal picture element electric capacity 42 accurate offset data signal, the voltage amplitude of data-signal as shown in FIG. is identical with compensating signal, and so the picture element 38 in the panel can produce a complete black block.In addition, because compensating signal is identical with common signal polarity, so the generation of compensating signal also can be set about from common signal, also have, because whether the compensation rate of compensating signal and panel present the cross-talk phenomenon connection is arranged greatly, decide compensation rate so can utilize source electrode chip 26 to detect inner certain signal.
Please consult Fig. 9 and Figure 13 simultaneously, common signal waveform with the display panel of understanding the present invention, V0-V7 is the magnitude of voltage on the pixel electrode of liquid crystal picture element electric capacity 42, common signal of the present invention is an alternating current, finding relatively down of Figure 13 and Fig. 7, the common signal of Fig. 7 is a direct current, so the power consumption of alternating current than consumption of direct current still less, also therefore the present invention can reduce the electric cost that makes the user.Common signal of the present invention in addition is because be an alternating current, so the voltage amplitude on the pixel electrode not only prior art than Fig. 7 is littler, can make panel reach the GTG brightness the same again with prior art, and the signal on the pixel electrode mainly is to be provided by source electrode chip 26, therefore when using alternating current as common signal, because the voltage amplitude on the pixel electrode need not be too big, thus the complexity of panel processing procedure and circuit thereof can be reduced, and then reduce the manufacturing cost of circuit.
More than explanation is just illustrative for the purpose of the present invention, and nonrestrictive, those of ordinary skills understand; under the situation of the spirit and scope that do not break away from following claims and limited, can make many modifications, change; or equivalence, but all will fall within the scope of protection of the present invention.
Claims (16)
1. high-efficiency liquid crystal display panel is characterized in that:
At least one source electrode chip, it is to produce a data-signal and a compensating signal;
Plural number row picture element unit, each this row picture element unit comprises two plural picture element of row and data lines, this data linear system connects this source electrode chip, with this two row picture element in each this row picture element unit, and transmit this data-signal to each this picture element, be located at again between this two row picture element in each this row picture element unit, each this picture element system receives an AC signal and this data-signal, and according to the shown GTG brightness of this data-signal control; And
The plural number compensating line, it is to connect this source electrode chip, and each this compensation linear system is located between adjacent this row picture element unit, and those compensation linear systems are transmitted this compensating signal, and this compensating signal can compensate the coupled voltages that this data-signal causes this AC signal in each this picture element.
2. high-efficiency liquid crystal display panel according to claim 1 is characterized in that, more comprises: at least one grid chip, and it is to produce one to scan signal; And
The plural number scanning linear, it is to connect this grid chip and those picture elements, and transmits this and scan signal to those picture elements, receives this data-signal to control each this picture element.
3. high-efficiency liquid crystal display panel according to claim 1 is characterized in that, two outermost of these row picture element unit are set up this compensating line respectively.
4. high-efficiency liquid crystal display panel according to claim 2 is characterized in that, each this picture element comprises:
One thin film transistor (TFT), its source electrode connects this data line, and its grid connects this scanning linear; And
One liquid crystal picture element electric capacity, it is to connect this thin film transistor (TFT), and receive this AC signal, this film crystal piping receives this data-signal and this scans signal, this scans the on off state of this thin film transistor (TFT) of signal may command, make this transistor control discharging and recharging of this liquid crystal picture element electric capacity, and then make its reversal of poles, and this compensating signal can compensate the coupled voltages that this data-signal causes this AC signal in this liquid crystal picture element electric capacity according to this data-signal.
5. high-efficiency liquid crystal display panel according to claim 1 is characterized in that, this data-signal and this compensating signal are all alternating current.
6. high-efficiency liquid crystal display panel according to claim 1 is characterized in that, this AC signal is identical with this compensating signal polarity.
7. high-efficiency liquid crystal display panel according to claim 1 is characterized in that, this AC signal is opposite with this data-signal polarity.
8. high-efficiency liquid crystal display panel according to claim 1 is characterized in that, the voltage quasi position of this compensating signal is the average voltage of this data-signal.
9. high-efficiency liquid crystal display panel according to claim 4 is characterized in that, when the polarity of this data-signal and this compensating signal was opposite, the polar switching mode of those liquid crystal picture element electric capacity was the line counter-rotating.
10. a driving method that is applied to the described display panels of claim 1 is characterized in that, comprises the following step:
Provide this AC signal to those picture elements; And
Each this picture element system comprises a liquid crystal picture element electric capacity and a thin film transistor (TFT), this liquid crystal picture element electric capacity receives this AC signal, and this transistor receives this data-signal, to control discharging and recharging of this liquid crystal picture element electric capacity according to this data-signal, and then make its reversal of poles, this compensating signal coupled voltages that can cause this AC signal in each this this data-signal of liquid crystal picture element capacitance compensation again.
11. the driving method of display panels according to claim 10 is characterized in that, this data-signal and this compensating signal are all alternating current.
12. the driving method of display panels according to claim 10 is characterized in that, this AC signal is identical with this compensating signal polarity.
13. the driving method of display panels according to claim 10 is characterized in that, this AC signal is opposite with this data-signal polarity.
14. the driving method of display panels according to claim 10 is characterized in that, the voltage quasi position of this compensating signal is the average voltage of this data-signal.
15. the driving method of display panels according to claim 10 is characterized in that, the source electrode of this thin film transistor (TFT) connects this data line, and drain connects this liquid crystal picture element electric capacity.
16. the driving method of display panels according to claim 10 is characterized in that, when the polarity of this data-signal and this compensating signal was opposite, the polar switching mode of those liquid crystal picture element electric capacity was the line counter-rotating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810216409A CN101714339A (en) | 2008-10-08 | 2008-10-08 | High-efficiency liquid crystal display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810216409A CN101714339A (en) | 2008-10-08 | 2008-10-08 | High-efficiency liquid crystal display panel |
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| CN101714339A true CN101714339A (en) | 2010-05-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238220A (en) * | 2014-09-29 | 2014-12-24 | 深圳市华星光电技术有限公司 | Liquid crystal display panel |
| CN105895021A (en) * | 2015-02-12 | 2016-08-24 | 三星显示有限公司 | Coupling compensator for display panel and display device including the same |
-
2008
- 2008-10-08 CN CN200810216409A patent/CN101714339A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104238220A (en) * | 2014-09-29 | 2014-12-24 | 深圳市华星光电技术有限公司 | Liquid crystal display panel |
| WO2016049951A1 (en) * | 2014-09-29 | 2016-04-07 | 深圳市华星光电技术有限公司 | Liquid crystal display panel |
| US9852704B2 (en) * | 2014-09-29 | 2017-12-26 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Liquid crystal display panel |
| CN105895021A (en) * | 2015-02-12 | 2016-08-24 | 三星显示有限公司 | Coupling compensator for display panel and display device including the same |
| CN105895021B (en) * | 2015-02-12 | 2020-05-26 | 三星显示有限公司 | Coupling compensator for display panel and display device including the same |
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