CN1667684A - Data driver and driving method thereof - Google Patents
Data driver and driving method thereof Download PDFInfo
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- CN1667684A CN1667684A CN 200410008058 CN200410008058A CN1667684A CN 1667684 A CN1667684 A CN 1667684A CN 200410008058 CN200410008058 CN 200410008058 CN 200410008058 A CN200410008058 A CN 200410008058A CN 1667684 A CN1667684 A CN 1667684A
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Abstract
A data driver and drive method, which is a data signal transmits from signal-generator accepted by a polyplexer, and then a control circuit outputs in order complex control signals to the polyplexer periodically. As soon as receiving the control signals, the polyplexer conducts the electron crystal in the control wire according to the received signals, to make the same data signal drives different loadings at different time, otherwise different data signals drive the same loading at different time.
Description
Technical field
The invention relates to a kind of method that drives data line, and particularly relevant for a kind of driving method that drives the data line of LCD with the upset type of drive.
Background technology
Multimedia society improves rapidly, is indebted to the tremendous progress of semiconductor element or man-machine display device mostly.With regard to display, (Cathode Ray Tube CRT) because of having excellent display quality and its economy, monopolizes monitor market in recent years to cathode-ray tube (CRT) always.Yet, operate the environment of a plurality of terminating machine/display equipments on the table simultaneously for the individual, or with the incision of the viewpoint of environmental protection, if predicted with the trend of saving the energy, cathode-ray tube (CRT) is because of still existing a lot of problems in space utilization and the energy resource consumption, and can't effectively provide solution for the demand of light, thin, short, little and low consumpting power.Therefore, have that high image quality, space utilization efficient are good, the membrane transistor LCD (Thin FilmTransistor Liquid Crystal Display, TFT LCD) of low consumpting power, advantageous characteristic such as radiationless become the main flow in market gradually.
Please refer to Fig. 4, it illustrates the data line driving circuit synoptic diagram of existing a kind of flat-panel screens.In Fig. 4, the signal source of three data signals is to be coupled to three data line R, G, B, and directly drives data line R, G, B.
Please follow with reference to Fig. 5, it illustrates the data line driving circuit synoptic diagram of existing another kind of flat-panel screens.In Fig. 5, the signal source of three data signals is to be coupled to three data line groups 502,504 and 506.Data line group 502 comprises three data line RA, GA, BA, and data line group 504 comprises three data line RB, GB, BB, and data line group 506 comprises three data line RC, GC, BC.Each data line group is to be driven by the signal source of the data signal that couples separately respectively, and video signal voltage is not each other influenced by other signal sources.
In the data line type of drive of existing flat-panel screens, because the video signal voltage on the data line is not influenced by other signal sources, therefore, when signal source uniformity coefficient each other was not good, what the video signal voltage that is used for driving data line also can be along with change was inaccurate.In general, this variation can be subjected to the restriction of processing procedure ability, and 5 to 50mV difference is arranged, and this difference will cause the demonstration of vertical bar streakline shape bad, and make that the image frame of flat-panel screens is inhomogeneous when showing grey picture.
Summary of the invention
Purpose of the present invention is exactly that a kind of upset driving method of data driver is being provided, it is to utilize to upset type of drive, drive same load at different time with different data signals, or drive different loads with same data signal at different time, make the output uniformity coefficient of data driver of flat-panel screens preferable, make flat-panel screens when showing grey picture, preferable image can be arranged.
Another object of the present invention provides a kind of data driver, and it is between data signal source and single data line, increases a multiplexer or selector switch, so that the data signal source can drive the single data line to upset type of drive.
Another object of the present invention provides a kind of data driver, and it is in the data signal source and has between the load of many group data lines, increases a multiplexer or selector switch, so that the data signal source can drive this load to upset the mode that drives.
The present invention is at the driving method that proposes a kind of data driver, and this data driver is to comprise a plurality of data driver elements and be coupled to a plurality of loads.This upsets driving method at first providing a plurality of data signals by the data signal source, then a plurality of control signals of exporting according to control circuit of the data driver element of data driver, in the different time, see through these data driver elements, drive same load with different data signals; Or, seeing through these data driver elements in the different time, one of them drives different loads with these data signals.
The present invention is proposing a kind of data driver, and it is to be coupled to load and the signal source with a plurality of data signals.This data driver comprises multiplexer and control circuit.Wherein, multiplexer comprises a plurality of data driver elements and has a plurality of input ends and a plurality of output terminal, in order to receive these data signals.And control circuit is for being coupled to multiplexer, and periodically export a plurality of control signals one of them, and multiplexer is according to these control signals, see through these data driver elements in the different time, drive same load or in the different time with different data signals, see through these data driver elements, one of them drives different loads with these data signals.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Description of drawings
Fig. 1 is the flow chart of steps that illustrates according to the upset driving method of a kind of data driver of a preferred embodiment of the present invention;
Fig. 2 is the circuit diagram that illustrates according to a kind of data driver of a preferred embodiment of the present invention;
Fig. 3 is the circuit diagram that illustrates according to the another kind of data driver of a preferred embodiment of the present invention;
Fig. 4 is the data line driving circuit synoptic diagram of existing a kind of flat-panel screens;
Fig. 5 is the data line driving circuit synoptic diagram of existing another kind of flat-panel screens.
Embodiment
Principal character of the present invention is at different time points, drives same load with different data signals, or at different time points, drives different loads with same data signal.
Please refer to Fig. 1, it illustrates the flow chart of steps according to the upset driving method of a kind of data driver of a preferred embodiment of the present invention, and it is to be applicable on the flat-panel screens.Wherein, as be familiar with can knowing easily of this technology, flat-panel screens can be LCD or organic light emitting diode display, but all not as limit.This data driver comprises multiplexer 220 and control circuit 210, and multiplexer also comprises a plurality of data driver elements 230 (as shown in Figure 2).
In the present embodiment, most the data signals of the upset driving method of this data driver for transmitting by multiplexer received signal source, and the data driver is a plurality of loads (s102) that are coupled to flat-panel screens.
In the present embodiment, when multiplexer received these control signals, promptly a plurality of control signals of exporting according to control circuit made the corresponding relation between these data signals and these loads that multiple variation (s104) be arranged.
In preferred embodiment of the present invention, data signal is changed in the different time with the wherein a kind of of corresponding relation between load, sees through these data driver elements, drives same load with different data signals.
In preferred embodiment of the present invention, the wherein another kind of of the corresponding relation between data signal and load was changed in the different time, saw through these data driver elements, drove different loads with identical data signal.
Please then refer to Fig. 2, it illustrates the circuit diagram according to a kind of data driver of a preferred embodiment of the present invention.In the present embodiment, for convenience of description for the purpose of, only illustrate three loads, in the circuit of reality, certainly ought be not as limit.
In Fig. 2, data driver 200 is the signal sources 240 that are coupled to 260,262 and 264 and three data signals of three loads.This data driver 200 comprises control circuit 210 and multiplexer 220.In the present embodiment, multiplexer 220 has 270,272,274 and three output terminals 280,282,284 of three input ends, to receive and to export these data signals.Control circuit 210 is coupled to multiplexer 220, periodically export three control signals one of them, and make multiplexer 220 according to these control signals one of them, these data signals 270 of decision output, 272,274 one of them to these loads 260,262 and 264 one of them.Wherein, output terminal 280 is to be coupled to load 260, and output terminal 282 is to be coupled to load 262, and output terminal 284 is to be coupled to load 264.
In the present embodiment, multiplexer 220 comprises three control lines 212,214 and 216, and be received from these control signals that control circuit transmits, and control line 212 is coupled to 3 electric crystals 222,224 and 226, control line 214 is coupled to 3 electric crystals 232,234 and 236, and control line 216 is coupled to 3 electric crystals 242,244 and 246.Wherein, the gate of each electric crystal is to be coupled to control line corresponding with it, the drain of each electric crystal be coupled to multiplexer 220 these input ends 270,272,274 one of them, the source electrode of each electric crystal be coupled to multiplexer 220 these output terminals 280,282,284 one of them.
In the present embodiment, when multiplexer 220 receives data signal, at first output control signals to control line 212 by control circuit 210, then electric crystal 222,224 and 226 is switched on.Therefore, via the data signal driving load 260 of input end 270, through the data signal driving load 262 of input end 272, through the data signal driving load 264 of input end 274.
When control circuit 210 output control signals to control line 214, electric crystal 232,234 and 236 was switched on.Therefore, via the data signal driving load 264 of input end 270, through the data signal driving load 260 of input end 272, through the data signal driving load 262 of input end 274.
When control circuit 210 output control signals to control line 216, electric crystal 242,244 and 246 was switched on.Therefore, via the data signal driving load 262 of input end 270, through the data signal driving load 264 of input end 272, through the data signal driving load 260 of input end 274.
In preferred embodiment of the present invention, as be familiar with this skill person and can know easily, load 260 can be the R data line (red data line) of flat-panel screens, load 262 can be the G data line (green data line) of flat-panel screens, load 264 can be the B data line (blue data line) of flat-panel screens, but all not as limit.
Please follow with reference to Fig. 3, it illustrates the circuit diagram according to the another kind of data driver of a preferred embodiment of the present invention.In Fig. 3, itself and the maximum difference of Fig. 2 are that the load 360 of Fig. 3 comprises RA, GA, three data lines of BA, and load 362 comprises RB, GB, three data lines of BB, and load 364 comprises RC, GC, three data lines of BC.
Please continue with reference to figure 3, in the present embodiment, its action at first outputs control signals to control line 212 by control circuit 210 for when multiplexer 220 receives data signal, and then electric crystal 222,224 and 226 is switched on.Therefore, drive three data lines of RA, GA, BA of load 360 via the data signal of input end 270, drive three data lines of RB, GB, BB of load 362 through the data signal of input end 272, drive three data lines of RC, GC, BC of load 364 through the data signal of input end 274.
When control circuit 210 output control signals to control line 214, electric crystal 232,234 and 236 was switched on.Therefore, drive three data lines of RC, GC, BC of load 364 via the data signal of input end 270, drive three data lines of RA, GA, BA of load 360 through the data signal of input end 272, drive three data lines of RB, GB, BB of load 362 through the data signal of input end 274.
When control circuit 210 output control signals to control line 216, electric crystal 242,244 and 246 was switched on.Therefore, drive three data lines of RB, GB, BB of load 362 via the data signal of input end 270, drive three data lines of RC, GC, BC of load 364 through the data signal of input end 272, drive three data lines of RA, GA, BA of load 360 through the data signal of input end 274.
In preferred embodiment of the present invention, electric crystal 222,224,226 can be a data driver element 230, but not as limit.
In preferred embodiment of the present invention, electric crystal 222,224,226,232,234,236,242,244,246, be to be the low temperature polycrystalline silicon electric crystal.
In preferred embodiment of the present invention, to be familiar with this skill person and can to know easily, multiplexer 220 can also be a selector switch, but not as limit.
Comprehensive the above, the upset driving method of data driver of the present invention is to remove to drive each data line with each data signal in regular turn, therefore can allow the output uniformity coefficient of data driver of flat-panel screens preferable, so that flat-panel screens can have preferable image when showing grey picture.
Though the present invention discloses as above with preferred embodiment; right its is not in order to limiting the present invention, anyly has the knack of this skill person, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention defines and is as the criterion when looking accompanying claim.
Claims (12)
1. the driving method of a data driver, wherein this data driver is to couple a plurality of loads and the signal source with a plurality of data signals, it is characterized in that, under the different time, goes to drive this same load with those different data signals.
2. the driving method of a data driver, wherein this data driver is to couple a plurality of loads and have one of a plurality of data signals signal source, it is characterized in that, under the different time, goes to drive those different loads with this same data signal.
3. a data driver is characterized in that, is to be coupled to a plurality of loads and the signal source with a plurality of data signals, and this data driver comprises:
One multiplexer comprises a plurality of data driver elements, a plurality of input end and a plurality of output terminal; And
One control circuit is coupled to this multiplexer, and periodically exports a plurality of control signals, with so that this multiplexer according to those control signals, under the different time, see through those data driver elements, go to drive this same load with those different data signals.
4. data driver as claimed in claim 3, it is characterized in that, wherein this multiplexer comprises a plurality of control lines, in order to being received from those control signals that this control circuit transmits, and arbitrary those control lines be coupled to corresponding those data driver elements one of them.
5. data driver as claimed in claim 4, it is characterized in that, wherein arbitrary those data driver elements are to comprise a plurality of electric crystals, and the gate of each electric crystal be coupled to those control lines corresponding with it one of them, the drain of each electric crystal be coupled to this multiplexer those input ends one of them, the source electrode of each electric crystal be coupled to this multiplexer those output terminals one of them.
6. data driver as claimed in claim 3 is characterized in that, wherein those loads are the single data lines for display.
7. data driver as claimed in claim 3 is characterized in that, wherein those loads are to comprise red data drive wire, green data drive wire and blue data drive wire.
8. a data driver is characterized in that, is to be coupled to a plurality of loads and to have one of a plurality of data signals signal source, and this data driver comprises:
One multiplexer comprises a plurality of data driver elements, a plurality of input end and a plurality of output terminal; And
One control circuit is coupled to this multiplexer, and periodically exports a plurality of control signals, with so that this multiplexer according to those control signals, under the different time, sees through those data driver elements, removes to drive those different loads with this same data signal.
9. data driver as claimed in claim 8, it is characterized in that, wherein this multiplexer comprises a plurality of control lines, in order to being received from those control signals that this control circuit transmits, and arbitrary those control lines be coupled to corresponding those data driver elements one of them.
10. data driver as claimed in claim 9, it is characterized in that, wherein arbitrary those data driver elements are to comprise a plurality of electric crystals, and the gate of each electric crystal be coupled to those control lines corresponding with it one of them, the drain of each electric crystal be coupled to this multiplexer those input ends one of them, the source electrode of each those electric crystal be coupled to this multiplexer those output terminals one of them.
11. data driver as claimed in claim 8 is characterized in that, wherein those loads are the single data lines for display.
12. data driver as claimed in claim 8 is characterized in that, wherein those loads are to comprise red data drive wire, green data drive wire and blue data drive wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100080587A CN100392718C (en) | 2004-03-09 | 2004-03-09 | Data driver and driving method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100080587A CN100392718C (en) | 2004-03-09 | 2004-03-09 | Data driver and driving method thereof |
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| CN1667684A true CN1667684A (en) | 2005-09-14 |
| CN100392718C CN100392718C (en) | 2008-06-04 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102542973A (en) * | 2011-11-18 | 2012-07-04 | 友达光电股份有限公司 | Display panel, multiplexer circuit therein and signal transmission method |
| CN103903573A (en) * | 2012-12-26 | 2014-07-02 | 联咏科技股份有限公司 | Time sequence scrambling method and time sequence control device thereof |
| CN104778912A (en) * | 2014-01-15 | 2015-07-15 | 群创光电股份有限公司 | Display device with de-multiplexers having different de-multiplex ratios |
| US9299285B2 (en) | 2012-12-10 | 2016-03-29 | Novatek Microelectronics Corp. | Timing scrambling method and timing control circuit thereof |
| CN108648680A (en) * | 2018-06-25 | 2018-10-12 | 厦门天马微电子有限公司 | A kind of display panel, its driving method, driving device and display device |
| CN108806586A (en) * | 2018-08-30 | 2018-11-13 | 厦门天马微电子有限公司 | Display panel, its driving method and display device |
| WO2019242109A1 (en) * | 2018-06-21 | 2019-12-26 | 深圳市华星光电半导体显示技术有限公司 | Drive circuit of liquid crystal display panel and liquid crystal display |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI469118B (en) * | 2012-07-16 | 2015-01-11 | Raydium Semiconductor Corp | Display device and source driver thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09258700A (en) * | 1996-03-22 | 1997-10-03 | Toshiba Electron Eng Corp | Driving circuit for liquid crystal display device |
| KR100840675B1 (en) * | 2002-01-14 | 2008-06-24 | 엘지디스플레이 주식회사 | Mehtod and apparatus for driving data of liquid crystal display |
| JP2004012634A (en) * | 2002-06-04 | 2004-01-15 | Seiko Epson Corp | Driving circuit of electro-optical apparatus, electro-optical apparatus, electronic appliance, and method for driving electro-optical apparatus |
-
2004
- 2004-03-09 CN CNB2004100080587A patent/CN100392718C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102542973A (en) * | 2011-11-18 | 2012-07-04 | 友达光电股份有限公司 | Display panel, multiplexer circuit therein and signal transmission method |
| CN102542973B (en) * | 2011-11-18 | 2014-10-15 | 友达光电股份有限公司 | Display panel, multiplexer circuit therein and signal transmission method |
| US9299285B2 (en) | 2012-12-10 | 2016-03-29 | Novatek Microelectronics Corp. | Timing scrambling method and timing control circuit thereof |
| CN103903573A (en) * | 2012-12-26 | 2014-07-02 | 联咏科技股份有限公司 | Time sequence scrambling method and time sequence control device thereof |
| CN104778912A (en) * | 2014-01-15 | 2015-07-15 | 群创光电股份有限公司 | Display device with de-multiplexers having different de-multiplex ratios |
| TWI569240B (en) * | 2014-01-15 | 2017-02-01 | 群創光電股份有限公司 | Display device with de-multiplexers having different de-multiplex ratios |
| WO2019242109A1 (en) * | 2018-06-21 | 2019-12-26 | 深圳市华星光电半导体显示技术有限公司 | Drive circuit of liquid crystal display panel and liquid crystal display |
| CN108648680A (en) * | 2018-06-25 | 2018-10-12 | 厦门天马微电子有限公司 | A kind of display panel, its driving method, driving device and display device |
| CN108806586A (en) * | 2018-08-30 | 2018-11-13 | 厦门天马微电子有限公司 | Display panel, its driving method and display device |
| CN108806586B (en) * | 2018-08-30 | 2021-06-22 | 厦门天马微电子有限公司 | Display panel, driving method thereof and display device |
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| Publication number | Publication date |
|---|---|
| CN100392718C (en) | 2008-06-04 |
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Granted publication date: 20080604 Termination date: 20180309 |