CN102708817B - Display device driving method and display device - Google Patents
Display device driving method and display device Download PDFInfo
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- CN102708817B CN102708817B CN201210103625.1A CN201210103625A CN102708817B CN 102708817 B CN102708817 B CN 102708817B CN 201210103625 A CN201210103625 A CN 201210103625A CN 102708817 B CN102708817 B CN 102708817B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a display device driving method and a display device. The display device comprises a grid driver and a source electrode driver. Scanning lines are sequentially unpacked one by one from scanning signals output by the grid driver, and the scanning lines in set number correspond to a frame picture. When the scanning lines are unpacked, data signals output from the source electrode driver are input into pixel units of the scanning lines through a data line, and a coupling capacitor is arranged between the data line and a public electrode. The display device driving method includes inputting set data signals into the data line for offsetting coupling action of the data line to the public electrode during unpacking the scanning line corresponding to the frame picture at the field blanking time before unpacking the first scanning line corresponding to one frame picture. Accordingly, the public electrode can be driven in a manner of fluctuation complementing with the data signals of the frame picture during unfolding the frame picture, and voltage of the public electrode is stabilized and stability of the picture is improved.
Description
Technical field
The present invention relates to driving method and the display device in display technique field, particularly a kind of display device.
Background technology
Thin Film Transistor-LCD (Thin Film Transistor-Liquid Crystal Display, TFT-LCD) has the features such as volume is little, low in energy consumption, radiationless, in current flat panel display market, has occupied leading position.Along with the fast development of TFT-LCD, large scale and high capacity product, for example large scale TV machine (television, TV) have cheaply been there is.The appearance of this series products is had higher requirement to picture quality.
(the Thin Film Transistor of thin film transistor (TFT) in prior art, TFT) pixel is when normal work, the scan line that one frame picture is corresponding is sequentially opened line by line, when one scan row is opened, data-signal is inputted to the pixel cell of this scan line by data line.But, conventionally between data line and public electrode, have coupling capacitance, and the design of high capacity product causes the coupling area between data line and public electrode larger, coupling capacitance is larger.Therefore, public electrode is write and fashionablely all can be subject to coupling influence at every scan-line data, thereby produces coupling phenomenon, and public electrode can deflect along with the polarity of data of transmission and the variation of intensity.If polarity and the intensity generation asymmetry change of the data of transmission, the voltage of public electrode will change so, picture quality will go wrong, for example, in the picture (pattern) of 1+2 point (dot) reversing mode, the picture of grey top there will be several row green originally, as shown in Figure 1, on display picture, above gray area 11, there is green area 12.
Summary of the invention
The embodiment of the present invention provides a kind of driving method and display device of improving display device picture quality, in order to stablize the voltage of public electrode, thus the stability of raising picture.
A kind of driving method that improves display device picture quality that the embodiment of the present invention provides, described display device comprises gate drivers and source electrode driver, from the sweep signal of described gate drivers output, scan line is sequentially opened line by line, wherein, set the corresponding frame picture of scan line of number, when scan line is opened, from the data-signal of described source electrode driver output, by data line, input the pixel cell of this scan line, between described data line and public electrode, have coupling capacitance, the method comprises:
Vertical blanking time before the first scan line corresponding to a frame picture opened, inputs described data line by data setting signal, in order to offset scan line corresponding to this frame picture while opening described in the coupling of data line to described public electrode.
A kind of display device that the embodiment of the present invention provides, the gate drivers for output scanning signal that comprises viewing area and outer setting thereof, with when scan line is opened by data line the source electrode driver to the pixel cell outputting data signals of scan line, and public electrode, wherein, between described data line and described public electrode, there is coupling capacitance
Described source electrode driver, also for the vertical blanking time before the first scan line corresponding to a frame picture opened, data setting signal is inputted to described data line, in order to offset scan line corresponding to this frame picture while opening described in the coupling of data line to described public electrode.
As seen through the above technical solutions, the embodiment of the present invention is in improving the process of display device picture quality, vertical blanking time before the first scan line corresponding to a frame picture opened, data setting signal is inputted to described data line, in order to offset scan line corresponding to this frame picture while opening described in the coupling of data line to public electrode.Therefore, the embodiment of the present invention can make public electrode when a frame picture is opened, just obtain the driving with this frame picture data signal fluctuation complementation, stablize the voltage of public electrode, thereby the stability of raising picture is improved picture quality.
Accompanying drawing explanation
In prior art, there is the schematic diagram of picture quality problem in Fig. 1;
Fig. 2 is the schematic flow sheet of a specific embodiment of the inventive method;
Fig. 3 is the schematic diagram of public electrode voltages fluctuation;
Fig. 4 is the schematic diagram of eliminating public electrode fluctuation in the present invention;
Fig. 5 is the structural representation of display device embodiment in the present invention.
Embodiment
The viewing area of display device is defined and is formed by many data lines that intersect and grid line, and grid line is because scan and open line by line, so also every a line grid line can be called to scan line.In scanning process, scanning is always from the upper left corner of image, and level is advanced forward, and analyzing spot also moves down with slower speed simultaneously.When analyzing spot arrives image right side edge, analyzing spot fast return left side, restarts to carry out the 2nd line scanning below the starting point of the 1st row, and the return course between row and row is called horizontal blanking.A complete image scanning signal, all row bursts that separated by horizontal blanking interval form, and are called a frame.Analyzing spot has scanned after a frame, from the lower right corner of image, turn back to the upper left corner of image, starts the scanning of a new frame, this time interval, be called vertical blanking, and also claim field blanking.
Between data line and public electrode, there is coupling capacitance, therefore, in order to stablize the voltage of public electrode, the stability of picture is provided, the embodiment of the present invention provides a kind of driving method that improves display device picture quality, described display device comprises gate drivers and source electrode driver, from the sweep signal of described gate drivers output, scan line is sequentially opened line by line, wherein, set the corresponding frame picture of scan line of number, when scan line is opened, from the data-signal of described source electrode driver output, by data line, input the pixel cell of this scan line, between described data line and public electrode, there is coupling capacitance, the method comprises:
Vertical blanking time before the first scan line corresponding to a frame picture opened, inputs described data line by data setting signal, in order to offset scan line corresponding to this frame picture while opening described in the coupling of data line to described public electrode.
Vertical blanking time before the first scan line is opened is inputted data setting signal to data line, can make public electrode start just to obtain the compensation on voltage before scanning at this frame picture, in the whole process of this frame picture scanning, public electrode can not be subject to the adverse effect that the variation because of the voltage data signal of input brings so.
Exemplarily, described data setting signal is contrary with the data-signal that the data line of all row in this frame picture can not be cancelled the coupling of described public electrode.
In the picture of 1+2dot reversing mode, described data setting signal can be the data-signal of the first scan line corresponding to this frame picture, like this, the data-signal transmitting in data line when vertical blanking time and the first scan line are opened is duplicate, if what transmit in data line when the second scan line and the 3rd scan line are opened is the data-signal after changing, and the voltage of the first row scan-line data signal and change after the voltage of data-signal complementary with respect to the rated voltage of public electrode.Therefore, the data-signal of the data-signal of vertical blanking time and the first scan line and the second scan line and the 3rd scan line is to cancel out each other on the impact of public electrode, to public electrode, bring coincideing of integral polarity and intensity, even if the impact that public electrode is not changed by voltage data signal, makes the voltage of public electrode be kept stable.
Below in conjunction with Fig. 2, one specific embodiment of the inventive method is explained in detail.In the present embodiment, the rated voltage of public electrode is 6 volts, the voltage of the first scan-line data signal is 4 volts, the voltage of the second scan line and the 3rd scan-line data signal is 8 volts, the voltage of the voltage of the first scan-line data signal and the second scan line and the 3rd scan-line data signal is complementary with respect to the rated voltage of public electrode, and the driving method that improves display device picture quality that embodiment of the present invention provides comprises following step:
Step 201: the vertical blanking time before the first scan line corresponding to a frame picture opened, by the data-signal input data line of the first scan line.
Step 202: open the first scan line, data wire size is inputted in the pixel cell of this scan line.
Step 203: judge whether this scan line is last scan line of this frame picture, if so, execution step 205, otherwise execution step 204.
Step 204: open next scan line and carry out data-signal input, then return to step 203.
Step 205: flow process finishes.
After last scan line has scanned, in the pixel cell of all scan lines that this frame picture is corresponding, all store corresponding data-signal, in viewing area, will demonstrate the picture that a frame is complete.Here, at vertical blanking time by the data-signal input data line of the first scan line, to guarantee vertical blanking time and the data-signal of the first scan line and the data-signal of the second scan line and the 3rd scan line, the impact of public electrode is cancelled out each other, to public electrode, bring coincideing of integral polarity and intensity, even if public electrode is not subject to the impact of voltage data signal variation, thereby provide the stability of display frame.
Fig. 3 is the schematic diagram of public electrode voltages fluctuation.Shown in Figure 3, the rated voltage of supposing public electrode is 6 volts, the voltage in clear zone and the rated voltage of public electrode differ 0.5 volt, the voltage of dark space and the rated voltage of public electrode differ 5 volts, "+" "-" represents the polarity of the data-signal that vertical blanking time last column is corresponding, also be the polarity of the data-signal of the first scan line, the polarity of this two row is the same.Below, former 6 row pixels are that example describes, in figure, all pixels of vertical blanking time are all clear zone, the front 3 row pixels of the first scan line are clear zone, 4,5,6 row pixels are dark space, and the front 3 row pixels of the second scan line and the 3rd scan line are dark space, and 4,5,6 row pixels are clear zone.From the angle of row, and consider change in polarity, while replacing in bright dark space, 5.5 volts of change in voltage.In the past the oscillogram of 6 row pixel voltages can be found out, the 1st row are cancelled out each other with the change in voltage of the 2nd row, the 4th row are cancelled out each other with the change in voltage of the 5th row, the part change in voltage of the change in voltage of the 3rd row and the 6th row is cancelled out each other, but, the change in voltage for the first time of the 6th row cannot be cancelled, by giving the certain coupling influence of public electrode, as shown in rightmost voltage oscillogram in figure.
For the voltage waveform phenomenon of public electrode in Fig. 3, the bright dark space of the pixel of vertical blanking time is changed, itself and the bright dark space of the first scan line are distributed identical, as shown in Figure 4.Equally, the implication that dark space represents with clear zone is identical with Fig. 3."+" "-" represents the polarity of the data-signal that vertical blanking time last column is corresponding, is also the polarity of the data-signal of the first scan line, and the polarity of this two row is the same.From Fig. 4, it seems, eliminated the change in voltage for the first time of the 6th row in Fig. 3, thereby eliminated the coupling influence to public electrode voltages, make the voltage of public electrode keep its rated voltage always.This shows, in this frame picture, all there is coupling to described public electrode in the data line of all row, and the part that can not be cancelled in these couplings easily causes the fluctuation of public electrode.Therefore, by the signal contrary to the part that can not be cancelled in the coupling of described public electrode of the data line with all row, be set as the data-signal in the vertical blanking time before the first scan line corresponding to this frame picture opened, just can offset scan line corresponding to this frame picture while opening described in data line fluctuation that the coupling of described public electrode is caused.
Fig. 5 is the structural representation of display device embodiment in the present invention.
Shown in Figure 5, the display device that the embodiment of the present invention provides comprises the gate drivers 52 for output scanning signal of viewing area 51 and outer setting thereof, with when scan line 53 is opened by data line 54 to the source electrode driver 55 of the pixel cell outputting data signals of scan line 53, and public electrode 57, wherein, between described data line 54 and described public electrode 57, there is coupling capacitance 56
Described source electrode driver 55, also for the vertical blanking time before the first scan line corresponding to a frame picture opened, data setting signal is inputted to described data line 54, in order to offset scan line 53 that this frame picture is corresponding while opening described in the coupling of 54 pairs of described public electrodes 57 of data line.
Exemplarily, described data setting signal is contrary with the data-signal that the coupling of 54 pairs of described public electrodes 57 of data line of all row in this frame picture can not be cancelled.In the picture of 1+2dot reversing mode, described data setting signal can be the data-signal of the first scan line corresponding to this frame picture.
Above-mentioned display device is when carrying out picture disply, public electrode 57 has just obtained the driving with this frame picture data signal fluctuation complementation when a frame picture is opened, therefore, public electrode 57 can not be subject to the impact of signal fluctuation in data line 54, voltage stabilization, thereby improve the stability of display frame, effectively improve picture quality.
As seen through the above technical solutions, the embodiment of the present invention is in improving the process of display device picture quality, vertical blanking time before the first scan line corresponding to a frame picture opened, data setting signal is inputted to described data line, in order to offset scan line corresponding to this frame picture while opening described in the coupling of data line to public electrode.Therefore, the embodiment of the present invention can make public electrode when a frame picture is opened, just obtain the driving with this frame picture data signal fluctuation complementation, stablize the voltage of public electrode, thereby the stability of raising picture is improved picture quality.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and within modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (4)
1. the driving method of a display device, described display device comprises gate drivers and source electrode driver, from the sweep signal of described gate drivers output, scan line is sequentially opened line by line, wherein, set the corresponding frame picture of scan line of number, when scan line is opened, from the data-signal of described source electrode driver output, by data line, input the pixel cell of this scan line, between described data line and public electrode, have coupling capacitance, it is characterized in that, the method comprises:
Vertical blanking time before the first scan line corresponding to a frame picture opened, by order to offset scan line corresponding to this frame picture while opening described in data line the data setting signal of the coupling of described public electrode is inputted to described data line;
In the picture of 1+2 point reversing mode, described data setting signal comprises the corresponding data-signal of the first scan line that this frame picture is corresponding.
2. the method for claim 1, is characterized in that, described data setting signal is contrary with the data-signal that the data line of all row in this frame picture can not be cancelled the coupling of described public electrode.
3. a display device, the gate drivers for output scanning signal that comprises viewing area and outer setting thereof, with when scan line is opened by data line the source electrode driver to the pixel cell outputting data signals of scan line, and public electrode, wherein, between described data line and described public electrode, there is coupling capacitance, it is characterized in that
Described source electrode driver, also for the vertical blanking time before the first scan line corresponding to a frame picture opened, by order to offset scan line corresponding to this frame picture while opening described in data line the data setting signal of the coupling of described public electrode is inputted to described data line; In the picture of 1+2 point reversing mode, described data setting signal comprises the corresponding data-signal of the first scan line that this frame picture is corresponding.
4. display device as claimed in claim 3, is characterized in that, described data setting signal is contrary with the data-signal that the data line of all row in this frame picture can not be cancelled the coupling of described public electrode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210103625.1A CN102708817B (en) | 2012-04-10 | 2012-04-10 | Display device driving method and display device |
| PCT/CN2012/084908 WO2013152591A1 (en) | 2012-04-10 | 2012-11-20 | Display device and driving method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210103625.1A CN102708817B (en) | 2012-04-10 | 2012-04-10 | Display device driving method and display device |
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| CN102708817A CN102708817A (en) | 2012-10-03 |
| CN102708817B true CN102708817B (en) | 2014-09-10 |
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| CN201210103625.1A Expired - Fee Related CN102708817B (en) | 2012-04-10 | 2012-04-10 | Display device driving method and display device |
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| CN (1) | CN102708817B (en) |
| WO (1) | WO2013152591A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708817B (en) * | 2012-04-10 | 2014-09-10 | 京东方科技集团股份有限公司 | Display device driving method and display device |
| CN103000156B (en) * | 2012-12-11 | 2015-04-08 | 京东方科技集团股份有限公司 | Liquid crystal display panel driving method, flicker testing method and liquid crystal display device |
| KR102347768B1 (en) * | 2017-04-24 | 2022-01-07 | 삼성디스플레이 주식회사 | Display apparatus and method of driving display panel using the same |
| CN108154854B (en) * | 2017-12-26 | 2020-10-02 | 南京中电熊猫平板显示科技有限公司 | Panel display device and data reverse compensation method thereof |
| CN109872702B (en) * | 2019-04-22 | 2021-10-01 | 合肥京东方光电科技有限公司 | Display driving method of liquid crystal display panel and liquid crystal display panel |
| CN114530118B (en) * | 2022-02-21 | 2023-05-30 | 广州华星光电半导体显示技术有限公司 | Display panel |
| CN115171598B (en) * | 2022-07-27 | 2023-04-18 | 富满微电子集团股份有限公司 | Blanking circuit and chip |
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| CN101373586A (en) * | 2007-08-22 | 2009-02-25 | 统宝光电股份有限公司 | Method of driving an active matrix liquid crystal display |
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| JPH0748148B2 (en) * | 1991-01-25 | 1995-05-24 | インターナショナル・ビジネス・マシーンズ・コーポレイション | Liquid crystal display controller, liquid crystal display device, and information processing device |
| JP3911141B2 (en) * | 2001-09-18 | 2007-05-09 | 株式会社日立製作所 | Liquid crystal display device and driving method thereof |
| DE60238553D1 (en) * | 2001-10-23 | 2011-01-20 | Panasonic Corp | Liquid crystal display and method for its activation |
| JP4853028B2 (en) * | 2006-01-18 | 2012-01-11 | 三菱電機株式会社 | Active matrix display device and semiconductor device for timing control thereof |
| JP4988258B2 (en) * | 2006-06-27 | 2012-08-01 | 三菱電機株式会社 | Liquid crystal display device and driving method thereof |
| CN102708817B (en) * | 2012-04-10 | 2014-09-10 | 京东方科技集团股份有限公司 | Display device driving method and display device |
-
2012
- 2012-04-10 CN CN201210103625.1A patent/CN102708817B/en not_active Expired - Fee Related
- 2012-11-20 WO PCT/CN2012/084908 patent/WO2013152591A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101373586A (en) * | 2007-08-22 | 2009-02-25 | 统宝光电股份有限公司 | Method of driving an active matrix liquid crystal display |
| CN101604512A (en) * | 2008-06-12 | 2009-12-16 | 乐金显示有限公司 | Liquid Crystal Display And Method For Driving |
| CN101419790A (en) * | 2008-12-04 | 2009-04-29 | 上海广电光电子有限公司 | Driving method for liquid crystal display device |
| CN101996593A (en) * | 2009-08-24 | 2011-03-30 | 华映视讯（吴江）有限公司 | Driving device and method of thin film transistor liquid crystal display |
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| Publication number | Publication date |
|---|---|
| WO2013152591A1 (en) | 2013-10-17 |
| CN102708817A (en) | 2012-10-03 |
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