CN103489418B - Driving method of display panel, display panel and grid driving circuit - Google Patents
Driving method of display panel, display panel and grid driving circuit Download PDFInfo
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- CN103489418B CN103489418B CN201310336550.6A CN201310336550A CN103489418B CN 103489418 B CN103489418 B CN 103489418B CN 201310336550 A CN201310336550 A CN 201310336550A CN 103489418 B CN103489418 B CN 103489418B
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Abstract
The invention provides a driving method of a display panel, the display panel and a grid driving circuit, wherein the driving method of the display panel comprises the following steps: pulling up a gate voltage of a transistor of a first pixel from a first voltage level to a second voltage level through a first scan line in a first scan period of a picture display period to turn on the transistor of the first pixel; writing a data signal with a first polarity into the first pixel in the first scanning period; pulling up a gate voltage of a transistor of a second pixel from a third voltage level to a fourth voltage level through a second scan line in a second scan period of the frame display period to turn on the transistor of the second pixel; and writing the data signal with the first polarity into the second pixel in the second scanning period. Wherein the first and second scan lines are adjacent, the fourth voltage level is lower than the second voltage level, and the third voltage level is lower than the first voltage level.
Description
Technical field
The present invention relates in a kind of driving method of display panel, display panel and gate driver circuit, especially relate to a kind of driving method, display panel and the gate driver circuit that improve the display panel of pixel charge differential.
Background technology
Generally speaking, display panels includes multiple pixel, gate driver circuit and source electrode drive circuit.Source electrode drive circuit is in order to write data-signal in the pixel be unlocked.Gate driver circuit comprises plural level shift register, is used to provide multiple signal to control the open and close of pixel.
Please refer to Fig. 1, Fig. 1 is the schematic diagram of existing two row reversal of poles (2-rowinversion) modes waveform correlation when driving display panels.As shown in Figure 1, be first pulled to the second voltage level V2 from the first voltage level V1 in the first scanning period t1, signal S1 of picture display period, to open the transistor of the first row pixel, and data-signal Sd is written into the first row pixel be unlocked.Afterwards, be also pulled to the second voltage level V2 from the first voltage level V1 in the second scanning period t2, signal S2 of picture display period, to open the transistor of the second row pixel, and data-signal Sd is written into the second row pixel be unlocked again.The polarity wherein writing the data-signal Sd of the first row pixel and the second row pixel is identical, and the polarity of the data-signal of the lower two row pixels of write is in contrast to the polarity of the data-signal of write the first row pixel and the second row pixel, by that analogy.
In above-mentioned two row reversal of poles modes, when the first row pixel is just unlocked, it is accurate that data-signal Sd not yet reaches predetermined voltage position, and when the second row pixel is unlocked, it is accurate that data-signal Sd has reached predetermined voltage position, therefore, have charge differential between the first row pixel and the second row pixel, and then affect the image quality of display panels.Especially when the frame updating frequency of display panels is higher, the duration of charging of pixel is shorter, and the pixel charge differential problem caused because of reversal of poles type of drive will be more serious.
Summary of the invention
The object of the present invention is to provide a kind of driving method, display panel and the gate driver circuit that improve the display panel of pixel charge differential, to solve the problem of prior art.
The driving method of display panel of the present invention comprises: via one first sweep trace, the grid voltage of the transistor of one first pixel is pulled to one second voltage level from one first voltage level, to open the transistor of this first pixel in the one first scanning period of a picture display period; The data-signal of tool one first polarity is write in this first pixel in this first scanning period; Via one second sweep trace, the grid voltage of the transistor of one second pixel is pulled to one the 4th voltage level, to open the transistor of this second pixel from a tertiary voltage position standard in the one second scanning period of this picture display period; And the data-signal of this first polarity of tool is write in this second pixel in this second scanning period; Wherein this first sweep trace is adjacent to this second sweep trace, and the 4th voltage level is lower than this second voltage level, and this tertiary voltage position is accurate lower than this first voltage level.
Gate driver circuit of the present invention comprises: multiple first shift register, and multiple second shift register.Each first shift register is in order to export a first grid signal, and this first grid signal is pulled to one second voltage level from one first voltage level, to open the transistor of corresponding pixel.Each second shift register is in order to export a second grid signal, and this second grid signal is pulled to one the 4th voltage level, to open the transistor of corresponding pixel from a tertiary voltage position standard.Wherein those first shift registers and those the second shift registers interconnected, the 4th voltage level is lower than this second voltage level, and this tertiary voltage position is accurate lower than this first voltage level.
Display panel of the present invention comprises: a picture element matrix, a gate driver circuit, and a data drive circuit.Picture element matrix comprises multiple pixel.Gate driver circuit comprises multiple first shift register, and multiple second shift register.Each first shift register is in order to export a first grid signal, and this first grid signal is pulled to one second voltage level from one first voltage level, to open the transistor of corresponding pixel.Each second shift register is in order to export a second grid signal, and this second grid signal is pulled to one the 4th voltage level, to open the transistor of corresponding pixel from a tertiary voltage position standard.This data drive circuit is in order to write corresponding data-signal in the pixel be unlocked.Wherein those first shift registers and those the second shift registers interconnected, the 4th voltage level is lower than this second voltage level, and this tertiary voltage position is accurate lower than this first voltage level.
Compared to prior art, the present invention exports the signal of different voltage level to open the pixel of adjacent rows respectively, and then improves the pixel charge differential problem because reversal of poles type of drive causes.Therefore display panel of the present invention has preferably image quality.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of existing two row reversal of poles modes waveform correlation when driving display panels;
Fig. 2 is the schematic diagram of display panel of the present invention;
Fig. 3 is the schematic diagram of Fig. 2 gate driver circuit;
Fig. 4 is the schematic diagram of the waveform correlation of the driving method of display panel of the present invention;
Fig. 5 is the schematic diagram of the waveform correlation of the driving method of display panel of the present invention;
Fig. 6 is the process flow diagram of the driving method of display panel of the present invention;
Fig. 7 is the schematic diagram that two row add a reversal of poles mode;
Fig. 8 is 2 schematic diagram adding a reversal of poles mode.
Reference numeral
100: display panel 110: picture element matrix
120: gate driver circuit 122: the first shift register
124: the second shift registers 130: data drive circuit
C: electric capacity D: data line
G1 ~ G4: sweep trace S1, S2: signal
Sg1: first grid signal Sg2: second grid signal
Sd, Sd1, Sd2: data-signal V1: the first voltage level
V2: the second voltage level V3: tertiary voltage position is accurate
V4: the four voltage level T: transistor
T1: the first scanning period t2: the second scanned the period
T3: the three scanning period t4: the four scanned the period
P: pixel 600: process flow diagram
610 to 680: step
Embodiment
Please also refer to Fig. 2 and Fig. 3, Fig. 2 is the schematic diagram of display panel of the present invention.Fig. 3 is the schematic diagram of Fig. 2 gate driver circuit.As shown in the figure, display panel 100 of the present invention comprises picture element matrix 110, gate driver circuit 120, and data drive circuit 130.Picture element matrix 110 comprises multiple pixel P.Gate driver circuit 120 comprises multiple first shift register 122, and multiple second shift register 124.First shift register 122 and the second shift register 124 respectively in order to export first grid signal Sg1 and second grid signal Sg2, and then open the transistor T of corresponding pixel P.First shift register 122 and the second shift register 124 interconnected.Data drive circuit 130 is in order to write corresponding data-signal in the electric capacity C of the pixel P be unlocked via data line D.
Please also refer to Fig. 4 and Fig. 5, and in the lump with reference to figure 2 and Fig. 3.Fig. 4 and Fig. 5 is the schematic diagram of the waveform correlation of the driving method of display panel of the present invention.When the present invention drives display panels 100 in two row reversal of poles modes, as shown in Figure 4, in the first scanning period t1 of picture display period, the first grid signal Sg1 that the first shift register 122 being positioned at the first order exports first is pulled to the second voltage level V2 from the first voltage level V1, to open the transistor T of the first row pixel P via sweep trace G1, and the data-signal Sd1 of tool first polarity is written into the first row pixel P be unlocked.Afterwards, in the second scanning period t2 of picture display period, the second grid signal Sg2 that the second shift register 124 being positioned at the second level exports is pulled to the 4th voltage level V4 from the accurate V3 in tertiary voltage position, to open the transistor T of the second row pixel P via sweep trace G2, and the data-signal Sd1 of tool first polarity is written into the second row pixel P be unlocked.Wherein the 4th voltage level V4 is lower than the second voltage level V2, and the accurate V3 in tertiary voltage position is lower than the first voltage level V1.
As shown in Figure 5, in the 3rd scanning period t3 of picture display period, the first grid signal Sg1 that the first shift register 122 being positioned at the third level exports first is pulled to the second voltage level V2 from the first voltage level V1, to open the transistor T of the third line pixel P via sweep trace G3, and the data-signal Sd2 of tool second polarity is written into the third line pixel P be unlocked.Afterwards, in the 4th scanning period t4 of picture display period, the second grid signal Sg2 that the second shift register 124 being positioned at the fourth stage exports is pulled to the 4th voltage level V4 from the accurate V3 in tertiary voltage position, to open the transistor T of fourth line pixel P via sweep trace G4, and the data-signal Sd2 of tool second polarity is written into the pixel P of the fourth line be unlocked, by that analogy.Wherein the second polarity is in contrast to this first polarity.
According to above-mentioned configuration, when display panel 100 of the present invention drives in two row reversal of poles (2-rowinversion) modes, the transistor T of the first row pixel P of adjacent rows pixel is opened by the first grid signal Sg1 of tool high voltage position standard, to shorten the time of data-signal write, the charge differential therefore between the first row pixel of adjacent rows pixel and the second row pixel will reduce.
In addition, in order to avoid feedthrough (feedthrough) effect of display panel 100, the voltage difference of the second voltage level V2 and the first voltage level V1 is same as the voltage difference of the 4th voltage level V4 and the accurate V3 in tertiary voltage position.
In the above-described embodiments, the driving method of display panel of the present invention is applied to two row reversal of poles modes, but, in other embodiments of the present invention, the driving method of display panel of the present invention also can be applicable to other reversal of poles mode, such as two point-polarity reversion (2-dotinversion) modes.Or driving method two row that also can be applicable to as shown in Figure 7 of display panel of the present invention add a reversal of poles mode, and 2 of being applied to as shown in Figure 8 add a reversal of poles mode.
Please refer to Fig. 6, Fig. 6 is the process flow diagram 600 of the driving method of display panel of the present invention.The flow process of the image treatment method of display device of the present invention is as the following step:
Step 610: via one first sweep trace, the grid voltage of the transistor of one first pixel is pulled to one second voltage level from one first voltage level, to open the transistor of this first pixel in the one first scanning period of a picture display period;
Step 620: write the data-signal of tool one first polarity in this first pixel in this first scanning period;
Step 630: via one second sweep trace, the grid voltage of the transistor of one second pixel is pulled to one the 4th voltage level, to open the transistor of this second pixel from a tertiary voltage position standard in the one second scanning period of this picture display period;
Step 640: write the data-signal of this first polarity of tool in this second pixel in this second scanning period;
Step 650: via a three scan line, the grid voltage of the transistor of one the 3rd pixel is pulled to this second voltage level from this first voltage level, to open the transistor of the 3rd pixel in one the 3rd scanning period of this picture display period;
Step 660: write the data-signal of tool one second polarity in the 3rd pixel in the 3rd scanning period;
Step 670: via one the 4th sweep trace, the grid voltage of the transistor of one the 4th pixel is pulled to the 4th voltage level from this tertiary voltage position standard, to open the transistor of the 4th pixel in one the 4th scanning period of this picture display period; And
Step 680: write the data-signal of this second polarity of tool in the 4th pixel in the 4th scanning period.
Compared to prior art, the present invention exports the signal of different voltage level to open the pixel of adjacent rows respectively, and then improves the pixel charge differential problem because reversal of poles type of drive causes.Therefore display panel of the present invention has preferably image quality.
Claims (7)
1. a driving method for display panel, is characterized in that, comprises:
Via one first sweep trace, the grid voltage of the transistor of one first pixel is pulled to one second voltage level from one first voltage level, to open the transistor of this first pixel in the one first scanning period of a picture display period;
The data-signal of tool one first polarity is write in this first pixel in this first scanning period;
Via one second sweep trace, the grid voltage of the transistor of one second pixel is pulled to one the 4th voltage level, to open the transistor of this second pixel from a tertiary voltage position standard in the one second scanning period of this picture display period; And
The data-signal of this first polarity of tool is write in this second pixel in this second scanning period;
Wherein this first sweep trace is adjacent to this second sweep trace, and the 4th voltage level is lower than this second voltage level, and this tertiary voltage position is accurate lower than this first voltage level;
The voltage difference of this second voltage level and this first voltage level is same as the voltage difference of the 4th voltage level and this tertiary voltage position standard.
2. the driving method of display panel according to claim 1, is characterized in that, separately comprises:
Via a three scan line, the grid voltage of the transistor of one the 3rd pixel is pulled to this second voltage level from this first voltage level, to open the transistor of the 3rd pixel in one the 3rd scanning period of this picture display period;
The data-signal of tool one second polarity is write in the 3rd pixel in the 3rd scanning period;
Via one the 4th sweep trace, the grid voltage of the transistor of one the 4th pixel is pulled to the 4th voltage level from this tertiary voltage position standard, to open the transistor of the 4th pixel in one the 4th scanning period of this picture display period;
The data-signal of this second polarity of tool is write in the 4th pixel in the 4th scanning period;
Wherein this three scan line is adjacent to the 4th sweep trace, and this second polarity is in contrast to this first polarity.
3. the driving method of display panel according to claim 1, is characterized in that, this display panel drives in two row reversal of poles modes.
4. the driving method of display panel according to claim 1, is characterized in that, this display panel drives with two point-polarity inversion modes.
5. a gate driver circuit, is characterized in that, comprises:
Multiple first shift register, each first shift register is in order to export a first grid signal, and this first grid signal is pulled to one second voltage level from one first voltage level, to open the transistor of corresponding pixel; And
Multiple second shift register, each second shift register is in order to export a second grid signal, and this second grid signal is pulled to one the 4th voltage level, to open the transistor of corresponding pixel from a tertiary voltage position standard;
Wherein those first shift registers and those the second shift registers interconnected, the 4th voltage level is lower than this second voltage level, and this tertiary voltage position is accurate lower than this first voltage level;
The voltage difference of this second voltage level and this first voltage level is same as the voltage difference of the 4th voltage level and this tertiary voltage position standard.
6. a display panel, is characterized in that, comprises:
One picture element matrix, comprises multiple pixel;
One gate driver circuit, comprises:
Multiple first shift register, each first shift register is in order to export a first grid signal, and this first grid signal is pulled to one second voltage level from one first voltage level, to open the transistor of corresponding pixel; And
Multiple second shift register, each second shift register is in order to export a second grid signal, and this second grid signal is pulled to one the 4th voltage level, to open the transistor of corresponding pixel from a tertiary voltage position standard; And
One data drive circuit, in order to write corresponding data-signal in the pixel be unlocked;
Wherein those first shift registers and those the second shift registers interconnected, the 4th voltage level is lower than this second voltage level, and this tertiary voltage position is accurate lower than this first voltage level;
The voltage difference of this second voltage level and this first voltage level is same as the voltage difference of the 4th voltage level and this tertiary voltage position standard.
7. display panel according to claim 6, it is characterized in that, this data drive circuit is in order to write data-signal two row pixels before adjacent four lines pixel of tool one first polarity, and these front two row pixels are sequentially by this first grid signal and this second grid unblanking, and data-signal two row pixels after adjacent four lines pixel of write tool one second polarity, and these rear two row pixels are sequentially by this first grid signal and this second grid unblanking, this second polarity is in contrast to this first polarity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102119635 | 2013-06-03 | ||
| TW102119635A TWI475551B (en) | 2013-06-03 | 2013-06-03 | Driving method of display panel, display panel and gate driving circuit |
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| CN103489418A CN103489418A (en) | 2014-01-01 |
| CN103489418B true CN103489418B (en) | 2015-12-09 |
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| CN106128349B (en) * | 2016-08-29 | 2019-01-22 | 武汉华星光电技术有限公司 | Flat display apparatus and its scan drive circuit |
| CN106710567A (en) * | 2017-03-31 | 2017-05-24 | 京东方科技集团股份有限公司 | Display driving device and method, shifting register and display device |
| CN107507588A (en) * | 2017-08-28 | 2017-12-22 | 惠科股份有限公司 | Driving circuit and driving method of display panel |
| TWI691945B (en) * | 2019-03-08 | 2020-04-21 | 凌巨科技股份有限公司 | Display device |
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| CN1753075A (en) * | 2005-10-24 | 2006-03-29 | 友达光电股份有限公司 | Liquid crystal display and its driving method |
| CN1831914A (en) * | 2006-04-25 | 2006-09-13 | 友达光电股份有限公司 | Scanning driving method and its two-dimensional display |
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| CN102194400A (en) * | 2011-03-29 | 2011-09-21 | 友达光电股份有限公司 | Driving method of display panel and display device adopting same |
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| EP1237139B1 (en) * | 2000-04-24 | 2017-10-04 | Panasonic Corporation | Display unit and drive method therefor |
| JP3681734B2 (en) * | 2003-05-09 | 2005-08-10 | シャープ株式会社 | Display device and display method |
| TWI288912B (en) * | 2004-04-01 | 2007-10-21 | Hannstar Display Corp | Driving method for a liquid crystal display |
| JP4595008B2 (en) * | 2008-08-12 | 2010-12-08 | ティーピーオー ディスプレイズ コーポレイション | Display device, electronic device, electronic system |
| JP2012103501A (en) * | 2010-11-10 | 2012-05-31 | Rohm Co Ltd | Liquid crystal display panel, liquid crystal driving device, and liquid crystal display device |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1753075A (en) * | 2005-10-24 | 2006-03-29 | 友达光电股份有限公司 | Liquid crystal display and its driving method |
| CN1831914A (en) * | 2006-04-25 | 2006-09-13 | 友达光电股份有限公司 | Scanning driving method and its two-dimensional display |
| CN1920628A (en) * | 2006-09-12 | 2007-02-28 | 友达光电股份有限公司 | Liquid crystal display device and its driving method |
| CN102194400A (en) * | 2011-03-29 | 2011-09-21 | 友达光电股份有限公司 | Driving method of display panel and display device adopting same |
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| TWI475551B (en) | 2015-03-01 |
| CN103489418A (en) | 2014-01-01 |
| TW201447857A (en) | 2014-12-16 |
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