CN101051125A - Liquid crystal display panel and its driving circuit and driving method - Google Patents
Liquid crystal display panel and its driving circuit and driving method Download PDFInfo
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- CN101051125A CN101051125A CN 200610060214 CN200610060214A CN101051125A CN 101051125 A CN101051125 A CN 101051125A CN 200610060214 CN200610060214 CN 200610060214 CN 200610060214 A CN200610060214 A CN 200610060214A CN 101051125 A CN101051125 A CN 101051125A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 12
- 239000010409 thin film Substances 0.000 claims description 39
- 239000000758 substrate Substances 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 3
- 230000004913 activation Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 6
- 239000010408 film Substances 0.000 description 2
- 101100350187 Caenorhabditis elegans odd-2 gene Proteins 0.000 description 1
- 101150088305 OSR1 gene Proteins 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
A driving circuit of liquid crystal face plate is prepared for driving data line by data driving circuit, driving scan line by scan driving circuit and providing a pre-charged voltage to data line by pre-charging voltage circuit before a line of scan line is scanned by scan driving circuit.
Description
[technical field]
The present invention relates to a kind of display panels and driving circuit thereof and driving method.
[background technology]
Because advantage such as display panels has gently, approaches, power consumption is little is widely used in modernized information equipments such as TV, notebook computer, mobile phone, personal digital assistant.At present, the application of display panels on market is more and more important.
Seeing also Fig. 1, is a kind of synoptic diagram of prior art liquid crystal display panel drive circuit.This liquid crystal display panel drive circuit 100 comprises that many sweep traces that are parallel to each other 101, many are parallel to each other and the data line 102 that intersects vertically with these sweep trace 101 insulation respectively, a plurality of thin film transistor (TFT) that is positioned at this sweep trace 101 and these data line 102 intersections (thin film transistor, TFT) 106, a plurality of pixel electrode 103, a plurality of public electrode 105, scan driving circuit 110 and a data drive circuit 120.This scan drive circuit 110 is used to drive this sweep trace 101.This data drive circuit 120 is used to drive this data line 102.
Seeing also Fig. 2, is the equivalent circuit diagram of these liquid crystal display panel drive circuit 100 1 pixel cells.One pixel electrode 103, a public electrode 105 and the liquid crystal molecule (figure does not show) that is sandwiched between this pixel electrode 103 and this public electrode 105 constitute a liquid crystal capacitance (not indicating).Each liquid crystal capacitance is driven by a thin film transistor (TFT) 106.Wherein, the grid 1062 of this thin film transistor (TFT) 106 is connected to this sweep trace 101, and source electrode 1064 is connected to this data line 102, and drain electrode 1066 is connected to this pixel electrode 103.
This data line 102 itself has certain resistance R, and can produce a stray capacitance C between the source electrode 1064 of this thin film transistor (TFT) 106 and the drain electrode 1066
Sd, make this resistance R and this stray capacitance C
SdConstitute a RC delay circuit together.This RC delay circuit makes the data-signal be applied on this data line 102 produce distortion, and degreeof tortuosity is by the resistance R and the stray capacitance C of this data line 102 itself
SdDecision.
Seeing also Fig. 3, is the data-signal distortion oscillogram on the data line 102 of this liquid crystal display panel drive circuit 100.Wherein, V
D1The data signal waveforms figure at contiguous these data drive circuit 120 places of expression, V
D2Expression is away from the data signal waveforms figure at these data drive circuit 120 places.Because resistance R is big more more at a distance from data drive circuit 120, data-signal is twisted serious more, thereby the big more then data-signal of this display panels size is twisted seriously more, and then has a strong impact on the picture display quality.
[summary of the invention]
In order to solve the lower problem of prior art display panels picture display quality, be necessary to provide a kind of picture display quality higher liquid crystal display panel drive circuit.
Also be necessary to provide a kind of picture display quality higher display panels.
More be necessary to provide a kind of driving method of above-mentioned display panels.
A kind of liquid crystal display panel drive circuit, it comprises many parallel scanning beams, many parallel and data line, a data drive circuit, scan driving circuit and a preacceleration inflation circuit that intersect with this sweep trace insulation.This data drive circuit is used for driving this data line.This scan drive circuit is used for driving this sweep trace.This preacceleration inflation circuit can provide a pre-charge pressure to data line before this scan drive circuit scans a horizontal scanning line.
A kind of display panels, it comprises liquid crystal layer between this first substrate and second substrate of second substrate, that one first substrate, is oppositely arranged with this first substrate, many parallel scanning beams, many parallel and data line, a data drive circuit, scan driving circuit and a preacceleration inflation circuit that intersect with this sweep trace insulation.This data drive circuit is used for driving this data line.This scan drive circuit is used for driving this sweep trace.This preacceleration inflation circuit can provide a pre-charge pressure to data line before this scan drive circuit scans a horizontal scanning line.
The driving method of above-mentioned display panels, it comprises the steps: that this scan drive circuit of a. scans before the horizontal scanning line, this preacceleration inflation circuit provides pre-charge pressure to data line; B. this scan drive circuit scans during the horizontal scanning line, this data drive circuit driving data lines.
Compared with prior art, the preacceleration inflation circuit of above-mentioned display panels can be before this scan drive circuit scans a horizontal scanning line, provide pre-charge pressure to data line from the data drive circuit farthest, what make data line reaches a pre-charge pressure earlier away from the data drive circuit place, be converted to the data-signal of these row again from this pre-charge pressure, what reduced data line in the prior art is converted to the distortion that this column data signal produces away from the data drive circuit place from zero.
[description of drawings]
Fig. 1 is a kind of synoptic diagram of prior art liquid crystal display panel drive circuit.
Fig. 2 is the equivalent circuit diagram of liquid crystal display panel drive circuit one pixel cell shown in Figure 1.
Fig. 3 is the data-signal distortion oscillogram on liquid crystal display panel drive circuit one data line shown in Figure 1.
Fig. 4 is the structural representation of display panels of the present invention.
Fig. 5 is the synoptic diagram of driving circuit one better embodiment of display panels shown in Figure 4.
Fig. 6 is the binary signal of two input ends inputs of precharge voltage generator of driving circuit of display panels shown in Figure 5 and the pre-charge pressure corresponding tables of two output terminals output.
Fig. 7 is the odd-numbered frame picture view of display panels shown in Figure 4.
Fig. 8 is the even frame picture view of display panels shown in Figure 4.
Fig. 9 is the drive signal waveform figure of display panels shown in Figure 4.
[embodiment]
Seeing also Fig. 4, is the structural representation of display panels of the present invention.This display panels 200 comprises one first substrate 260, the liquid crystal layer 270 of one second substrate 280, between this first substrate 260 and this second substrate 280.Usually, this display panels 200 needs one drive circuit to drive.
Seeing also Fig. 5, is the synoptic diagram of driving circuit one better embodiment of this display panels 200.The driving circuit 250 of this display panels 200 comprises that many sweep traces that are parallel to each other 201, many are parallel to each other and the data line 202 that intersects vertically with these sweep trace 201 insulation respectively, a plurality of the first film transistor 206, a plurality of pixel electrode 203, scan driving circuit 210, a data drive circuit 220, a preacceleration inflation circuit 230 and clock control circuit 240 that is positioned at this sweep trace 201 and these data line 202 infalls.
The grid of this first film transistor 206 (not indicating) is connected to this sweep trace 201, and source electrode (not indicating) is connected to this data line 202, and drain electrode (not indicating) is connected to this pixel electrode 203.
This scan drive circuit 210 is used for driving this sweep trace 201.This data drive circuit 220 comprises an activation end 221.When this activation end 221 was applied in a low-voltage, this data drive circuit 220 drove this data line 202; When this activation end 221 was applied in a high voltage, this data drive circuit 220 did not drive this data line 202.
This clock control circuit 240 is connected with this preacceleration inflation circuit 230 with the activation end 221 of scan drive circuit 210, this data drive circuit 220 and is used for controlling this display panels 200 display images.
This preacceleration inflation circuit 230 comprises a precharge voltage generator 235 and a plurality of second thin film transistor (TFT) 236.This precharge voltage generator 235 comprises a first input end m
1, one second input end m
2, one first output terminal s
1With one second output terminal s
2This second thin film transistor (TFT) 236 comprises a grid that is connected with this clock control circuit 240 2362, one and this first output terminal s
1Or the second output terminal s
2The source electrode 2364 and a drain electrode 2366 that is connected with this data line 202 that connect.This first output terminal s
1By this second thin film transistor (TFT) 236 be connected to odd column data line 202 from data drive circuit 220 farthest.This second output terminal s
2By this second thin film transistor (TFT) 236 be connected to even column data line 202 from data drive circuit 220 farthest.
This preacceleration inflation circuit 230 be used to provide pre-charge pressure to this data line 202 from data drive circuit 220 farthest.When this clock control circuit 240 provides the grid 2362 of a high voltage to this second thin film transistor (TFT) 236, this second thin film transistor (TFT) 236 is opened, this preacceleration inflation circuit 230 provide a plurality of pre-charge pressures to each column data line 202 from data drive circuit 220 farthest.
The driving method of this display panels 200 comprises the steps: that this clock control circuit 240 of a. is before these scan drive circuit 210 every scanning one horizontal scanning lines 201, this clock control circuit 240 provides the activation end 221 of a high voltage to this data drive circuit 220 and the grid 2362 of second thin film transistor (TFT) 236 of this preacceleration inflation circuit 230, this second thin film transistor (TFT) 236 is opened, this preacceleration inflation circuit 230 provide pre-charge pressure to each column data line 202 from data drive circuit 220 farthest; B. this clock control circuit 240 is during these scan drive circuit 210 every scanning one horizontal scanning lines 201, the activation end 221 of one low-voltage to this data drive circuit 220 and the grid 2362 of second thin film transistor (TFT) 236 of this preacceleration inflation circuit 230 are provided, this second thin film transistor (TFT) 236 cuts out, and this data drive circuit 220 drives each column data line 202.
Usually, this display panels 200 comprises face counter-rotating, row counter-rotating, row counter-rotating and four kinds of driving methods of some counter-rotating.Wherein, the pre-charge pressure difference of each driving method correspondence of this display panels 200.
Seeing also Fig. 6, is two input end m of this precharge voltage generator 235
1, m
2The binary signal and the two output terminal s of input
1, s
2The pre-charge pressure corresponding tables of output.Two input end m of this precharge voltage generator 235
1, m
2Imported binary signal respectively at 0,0 o'clock, this two output terminal s
1, s
2The pre-charge pressure of output is respectively positive voltage V
1 +, negative voltage V
2 -Two input end m of this precharge voltage generator 235
1, m
2Imported binary signal respectively at 0,1 o'clock, this two output terminal s
1, s
2The pre-charge pressure of output all is negative voltage V
2 -Two input end m of this precharge voltage generator 235
1, m
2Imported binary signal respectively at 1,0 o'clock, this two output terminal s
1, s
2The pre-charge pressure of output all is positive voltage V
1 +Two input end m of this precharge voltage generator 235
1, m
2Imported binary signal respectively at 1,1 o'clock, this two output terminal s
1, s
2The pre-charge pressure of output is respectively negative voltage V
2 -, positive voltage V
1 +
Be the two output terminal S that example illustrates this precharge voltage generator 235 with the row inversion driving method below
1, S
2The selection of the pre-charge pressure of output and the concrete driving method of this display panels 200.
See also Fig. 7 and Fig. 8, Fig. 7 is the odd-numbered frame picture view of this display panels 200, and Fig. 8 is the even frame picture view of this display panels 200.Wherein, defining this sweep trace 201, to have scanned all row be a frame used times, " V
D1-V
Dm" represent the polarity of a plurality of data-signals of this data line 202.
Because in the odd-numbered frame picture, the odd column data-signal of this data line 202 is a positive voltage, the even column data-signal is a negative voltage, thereby the pre-charge pressure of the odd column data line 202 of this display panels 200 should be positive voltage V in the odd-numbered frame picture
1 +, the pre-charge pressure of even column data line 202 should be negative voltage V
2 -, i.e. two output terminal s of this precharge voltage generator 235
1, s
2The pre-charge pressure of output should be selected positive voltage V
1 +, negative voltage V
2 -
In addition, in the even frame picture, the polarity of the data-signal of this data line 202 is opposite with the polarity of data-signal in the odd-numbered frame picture, thereby the pre-charge pressure of the odd column data line 202 of this display panels 200 should be negative voltage V in the even frame picture
2 -, the pre-charge pressure of even column data line 202 should be positive voltage V
1 +, i.e. two output terminal s of this precharge voltage generator 235
1, s
2The pre-charge pressure of output should be selected negative voltage V
2 -, positive voltage V
1 +
Therefore, the binary signal of two input ends of this precharge voltage generator input should be that unit switches between 0,0 and 1,1 with the frame.
Seeing also Fig. 9, is the drive signal waveform figure of this display panels 200.Wherein, " V
Con" be the voltage oscillogram of the activation end 221 of this data drive circuit 220, " G
1-G
n" be a plurality of sweep signal oscillograms, " V
Odd" be the pre-charge pressure oscillogram of this odd column data line, " V
Even" be the pre-charge pressure oscillogram of this even column data line, " V
Odd1" be odd column data signal waveforms figure, " V
Even1" be even column data signal waveforms figure, " V
Odd2" be the voltage oscillogram away from data drive circuit 220 places of this odd column data line 202, " V
Even2" be the voltage oscillogram away from data drive circuit 220 places of this even column data line 202.The concrete actuation step of this display panels 200 is as follows:
A. during the odd-numbered frame picture, this clock control circuit 240 is before these scan drive circuit 210 every scanning one horizontal scanning lines 201, the activation end 221 of one high voltage to this data drive circuit 220 and the grid 2362 of second thin film transistor (TFT) 236 of this preacceleration inflation circuit 230 are provided, this second thin film transistor (TFT) 236 is opened, and this preacceleration inflation circuit 230 provides a positive voltage V respectively
1 +With a negative voltage V
2 -To odd column data line 202 from data drive circuit 220 farthest and even column data line 202 from data drive circuit 220 farthest;
B. this clock control circuit 240 is during these scan drive circuit 210 every scanning one horizontal scanning lines 201, the activation end 221 of one low-voltage to this data drive circuit 220 and the grid 2362 of second thin film transistor (TFT) 236 of this preacceleration inflation circuit 230 are provided, this second thin film transistor (TFT) 236 cuts out, and this data drive circuit 220 drives this data line 202;
C. during the even frame picture, this clock control circuit 240 is before these scan drive circuit 210 every scanning one horizontal scanning lines 201, the activation end 221 of one high voltage to this data drive circuit 220 and the grid 2362 of second thin film transistor (TFT) 236 of this preacceleration inflation circuit 230 are provided, this second thin film transistor (TFT) 236 is opened, and this preacceleration inflation circuit 230 provides a negative voltage V respectively
2 -With a positive voltage V
1 +To odd column data line 202 from data drive circuit 220 farthest and even column data line 202 from data drive circuit 220 farthest;
D. this clock control circuit 240 is during these scan drive circuit 210 every scanning one horizontal scanning lines 201, the activation end 221 of one low-voltage to this data drive circuit 220 and the grid 2362 of second thin film transistor (TFT) 236 of this preacceleration inflation circuit 230 are provided, this second thin film transistor (TFT) 236 cuts out, and this data drive circuit 220 drives this data line 202.
Because two output terminal s of this preacceleration inflation circuit 230
1, s
2All by this second thin film transistor (TFT) 236 be connected to each column data line 202 from data drive circuit 220 farthest, make this display panels 200 each column data line 202 reach a pre-charge pressure earlier away from data drive circuit 220 places, be converted to the data-signal of these row again from this pre-charge pressure, what reduced each column data line 202 is converted to the distortion that this column data signal produces away from data data drive circuit 220 places from zero.Thereby this display panels 200 has higher picture display quality.
It is described that display panels 200 of the present invention is not limited to above embodiment, as: two output terminals of this preacceleration inflation circuit by this second thin film transistor (TFT) be connected to each column data line away from one of the position at data drive circuit 220 places, and be not attached to each column data line from data drive circuit 220 farthest; When the driving method of this display panels 200 is face counter-rotating or row counter-rotating, the first output terminal s of this precharge voltage generator 235
1Can be connected to each column data line 202, the second output terminal s by the source electrode 2364 of second thin film transistor (TFT) 236
2Suspension joint (floating).
Claims (10)
1. liquid crystal display panel drive circuit, it comprises: many parallel scanning beams, many parallel and data line, a data drive circuit and scan driving circuit that intersect with this sweep trace insulation, this data drive circuit is used for driving this data line, this scan drive circuit is used for driving this sweep trace, it is characterized in that: this liquid crystal display panel drive circuit further comprises a preacceleration inflation circuit, this preacceleration inflation circuit can provide a pre-charge pressure to data line before this scan drive circuit scans a horizontal scanning line.
2. liquid crystal display panel drive circuit as claimed in claim 1, it is characterized in that: this liquid crystal display panel drive circuit further comprises a clock control circuit, this clock control circuit is connected with this scan drive circuit, this data drive circuit and preacceleration inflation circuit respectively, is used for controlling this display panels display image.
3. liquid crystal display panel drive circuit as claimed in claim 2, it is characterized in that: this preacceleration inflation circuit comprises a precharge voltage generator and a plurality of thin film transistor (TFT), this precharge voltage generator comprises a first input end, one second input end, one first output terminal and one second output terminal, this first output terminal is connected to the odd column data line by this thin film transistor (TFT), this second output terminal is connected to the even column data line by this thin film transistor (TFT), the grid of this thin film transistor (TFT) is connected to this clock control circuit, and drain electrode is connected to this data line.
4. liquid crystal display panel drive circuit as claimed in claim 3 is characterized in that: first output terminal of this preacceleration inflation circuit and second output terminal by this thin film transistor (TFT) be connected to data line from the data drive circuit farthest.
5. liquid crystal display panel drive circuit as claimed in claim 2, it is characterized in that: this preacceleration inflation circuit comprises a precharge voltage generator and a plurality of thin film transistor (TFT), this precharge voltage generator comprises a first input end, one second input end, one first output terminal and one second output terminal, the grid of this thin film transistor (TFT) is connected to this clock control circuit, source electrode is connected to first output terminal and drain electrode is connected to this data line, the second output terminal suspension joint.
6. display panels, it comprises: one first substrate, one second substrate that is oppositely arranged with this first substrate, one liquid crystal layer between this first substrate and second substrate, many parallel scanning beams, many parallel and data lines that intersect with this sweep trace, one data drive circuit, scan driving circuit, this data drive circuit is used for driving this data line, this scan drive circuit is used for driving this sweep trace, it is characterized in that: this display panels further comprises a preacceleration inflation circuit, this preacceleration inflation circuit can provide a pre-charge pressure to data line before this scan drive circuit scans a horizontal scanning line.
7. display panels as claimed in claim 6, it is characterized in that: this display panels further comprises a clock control circuit, this clock control circuit is connected with this scan drive circuit, this data drive circuit and preacceleration inflation circuit respectively, is used for controlling this display panels display image.
8. display panels as claimed in claim 7, it is characterized in that: this preacceleration inflation circuit comprises a precharge voltage generator and a plurality of thin film transistor (TFT), this precharge voltage generator comprises a first input end, one second input end, one first output terminal and one second output terminal, this first output terminal is connected to the odd column data line by this thin film transistor (TFT), this second output terminal is connected to the even column data line by this thin film transistor (TFT), the grid of this thin film transistor (TFT) is connected to this clock control circuit, and drain electrode is connected to this data line.
9. display panels as claimed in claim 7, it is characterized in that: this preacceleration inflation circuit comprises a precharge voltage generator and a plurality of thin film transistor (TFT), this precharge voltage generator comprises a first input end, one second input end, one first output terminal and one second output terminal, the grid of this thin film transistor (TFT) is connected to this clock control circuit, source electrode is connected to first output terminal and drain electrode is connected to this data line, the second output terminal suspension joint.
10. the driving method of a display panels as claimed in claim 6, it comprises the steps:
A. this scan drive circuit scans before the horizontal scanning line, and this preacceleration inflation circuit provides pre-charge pressure to data line;
B. this scan drive circuit scans during the horizontal scanning line, this data drive circuit driving data lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610060214 CN101051125A (en) | 2006-04-07 | 2006-04-07 | Liquid crystal display panel and its driving circuit and driving method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610060214 CN101051125A (en) | 2006-04-07 | 2006-04-07 | Liquid crystal display panel and its driving circuit and driving method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101051125A true CN101051125A (en) | 2007-10-10 |
Family
ID=38782616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610060214 Pending CN101051125A (en) | 2006-04-07 | 2006-04-07 | Liquid crystal display panel and its driving circuit and driving method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101051125A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018120364A1 (en) * | 2016-12-28 | 2018-07-05 | 深圳市华星光电技术有限公司 | Display panel driving device and driving method |
| CN108682404A (en) * | 2018-03-07 | 2018-10-19 | 友达光电股份有限公司 | Display panel and precharging method |
| CN111179807A (en) * | 2019-04-09 | 2020-05-19 | 友达光电股份有限公司 | Display panel and driving method thereof |
| WO2020192619A1 (en) * | 2019-03-25 | 2020-10-01 | 京东方科技集团股份有限公司 | Display panel drive circuit and drive method, and display panel |
-
2006
- 2006-04-07 CN CN 200610060214 patent/CN101051125A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018120364A1 (en) * | 2016-12-28 | 2018-07-05 | 深圳市华星光电技术有限公司 | Display panel driving device and driving method |
| CN108682404A (en) * | 2018-03-07 | 2018-10-19 | 友达光电股份有限公司 | Display panel and precharging method |
| CN108682404B (en) * | 2018-03-07 | 2021-03-23 | 友达光电股份有限公司 | Display panel and pre-charging method |
| WO2020192619A1 (en) * | 2019-03-25 | 2020-10-01 | 京东方科技集团股份有限公司 | Display panel drive circuit and drive method, and display panel |
| US11270617B2 (en) | 2019-03-25 | 2022-03-08 | Boe Technology Group Co., Ltd. | Drive circuit for display panel, and drive method and display panel thereof |
| CN111179807A (en) * | 2019-04-09 | 2020-05-19 | 友达光电股份有限公司 | Display panel and driving method thereof |
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