CN1758316A - Driving method - Google Patents
Driving method Download PDFInfo
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- CN1758316A CN1758316A CN 200410080607 CN200410080607A CN1758316A CN 1758316 A CN1758316 A CN 1758316A CN 200410080607 CN200410080607 CN 200410080607 CN 200410080607 A CN200410080607 A CN 200410080607A CN 1758316 A CN1758316 A CN 1758316A
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- gate driving
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Abstract
This invention provides a drive method suitable for driving LCD, in which, the LCD has many grating drive line units, each of which is composed of adjacent multiple grating drive lines, first of all, the grating drive lines in the first unit and the grating drive lines in the second unit are selected. Then, in the first time interval of the clock pulse period of the operational clock pulse signal, the black image signal refreshes the selected grating drive lines in the first unit, then, in the second time interval of the clock pulse period of the operational clock pulse signal, a normal image signal refreshes the selected grating drive lines in the second drive line unit and the above mentioned step is repeated.
Description
Technical field
The invention relates to a kind of driving method, and particularly about a kind of LCD (Liquid Crystal Display, the invention of driving method LCD).
Background technology
Along with the high development of multimedia technology, the transmission of image information at present transfers digital transmission to by simulation mostly, and in order to cooperate modern life pattern, it is frivolous that the volume of video or image device also day by day is tending towards.Traditional cathode-ray tube (CRT) (Cathode RayTube, CRT) though display has advantages such as excellent display quality and low cost, but because the structure of its internal electron rifle, make display can't meet the demand of slimming, lightweight and low consumpting power, and the user also exist when watching radiant rays to hinder problems such as eye.Therefore, along with the maturation of photoelectric technology and semiconductor fabrication in recent years, (Flat Panel Display) is just flourish for flat-panel screens, wherein LCD is based on advantage such as its low voltage operating, radiationless line scattering, in light weight and volume be little, replaces traditional cathode-ray tube display more gradually and becomes the main flow of display product in recent years.
The application category of LCD is moved towards such as consumption electronic products such as TV, portable mobile apparatus by the computing machine Related product gradually at present, wherein the display of general computing machine purposes is used for showing static image more, and the display of consumption electronic products provides multiple functions such as amusement and realtime graphic because of need, therefore is usually used in showing dynamic image inevitably.Yet present LCD the unclear or image of the soft edge of image occurs through regular meeting and situations such as towing occur when playing dynamic image.This is because the reaction velocity of liquid crystal itself is slower, and because LCD is the light-emitting mode that belongs to lasting pattern (hold-type), therefore as user during at the dynamic image of watching LCD to play, tend to integration behavior pattern, and make display image produce edge image retention problems such as (edge blur) because of human eye.
Summary of the invention
In view of this, purpose of the present invention just provides a kind of driving method, and this method is improved the display quality of the dynamic image of LCD by the mode of image black plug (black insertion).
Another object of the present invention provides a kind of driving method, and this method can be carried out the action of voltage preliminary filling to the pixel that is about to demonstration, to overcome the problem of pixel undercharge.
Based on above-mentioned purpose, the present invention proposes a kind of driving method, this method is suitable for driving LCD, wherein LCD for example has a plurality of gate driving lines unit, and each gate driving line unit is made of bar gate driving line more than adjacent, and gate driving line unit selects signal to be controlled by grid respectively, and the compounding practice clock pulse signal writes voltage signal to LCD.The present invention's driving method comprises the following steps: that (a) chooses gate driving line in the first grid drive wire unit and the gate driving line in the second grid drive wire unit; (b) in the very first time interval of the clock cycle of operating clock pulse signal, upgrade the gate driving line that is selected in the first grid drive wire unit with black signal; (c) in second time interval of the clock cycle of operating clock pulse signal, upgrade the gate driving line that is selected in the second grid drive wire unit with normal image signal; (d) under choosing in the first grid drive wire unit in gate driving line and the second grid drive wire unit under a gate driving line; And (e) repeating step (b) to step (d) repeatedly.
In a preferred embodiment, driving method of the present invention is when choosing the gate driving line of first grid drive wire unit, more for example comprise and choose next bar gate driving line that preparation writes the same polarity voltage signal simultaneously, and when upgrading the gate driving line, this next bar gate driving line is carried out the voltage preliminary filling with black signal.In addition, when choosing the gate driving line of second grid drive wire unit, more for example comprise and choose next bar gate driving line that preparation writes the same polarity voltage signal simultaneously, and when upgrading the gate driving line, this next bar gate driving line is carried out the voltage preliminary filling with normal image signal.
Based on above-mentioned, the present invention's driving method inserts black image between the shown normal picture of LCD, light-emitting mode with emulation pulse type (pulse-type), therefore help to eliminate the edge image retention that produces on the dynamic image, and then improve the display quality of the dynamic image of LCD.
State with other purpose, feature and advantage and can become apparent on the present invention for allowing, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
Description of drawings
Fig. 1 is the conspectus of a kind of LCD of the present invention's preferred embodiment.
Fig. 2 is a kind of signal timing diagram of the present invention's driving method.
Fig. 3 is a kind of signal timing diagram with driving method of voltage preliminary filling function of the present invention's preferred embodiment.
Fig. 4 has the signal timing diagram of the driving method of voltage preliminary filling function for the present invention's the another kind of preferred embodiment.
The primary clustering symbol description
100: LCD
112: pixel
120: source driving chip
122: the source drive line
130: grid drive chip
130a: first grid chip for driving
130b: second grid chip for driving
130c: the 3rd grid drive chip
G1～G3N: gate driving line
LP: operating clock pulse signal
OE1: first grid is selected signal
OE2: second grid is selected signal
OE3: the 3rd grid is selected signal
T1, T2, T3, T4, T5: clock cycle
T1a, T2a, T3a, T4a, T5a: very first time interval
T1b, T2b, T3b, T4b, T5b: second time interval
Embodiment
Please refer to Fig. 1, Fig. 1 is a kind of conspectus of LCD of the present invention's preferred embodiment.LCD 100 for example has pixel 112 and a plurality of source driving chips (sourceIC) 120 and a plurality of grid drive chip (gate IC) 130 in order to drive these pixels 112 that a plurality of arrays are arranged, wherein source driving chip 120 is coupled to the pixel 112 of each row by many source drive lines 122, to provide update image required picture material signal.In addition, grid drive chip 130 is coupled to the pixel 112 of each row by many gate driving line G1～G3N, with the pixel 112 of controlling each row.
In the present embodiment, grid drive chip 130 for example comprises first grid chip for driving 130a, second grid chip for driving 130b and the 3rd grid drive chip 130c, wherein the pixel 112 of the 1st～N row is coupled to first grid chip for driving 130a by gate driving line G1～GN respectively, and the pixel 112 of the N+1～2N row is coupled to second grid chip for driving 130b by gate driving line GN+1～G2N respectively, and the pixel 112 of the 2N+1～3N row is coupled to the 3rd grid drive chip 130c by gate driving line G2N+1～G3N respectively.In addition, first grid chip for driving 130a, second grid chip for driving 130b and the 3rd grid drive chip 130c select signal OE1, second grid to select signal OE2 and the 3rd grid to select signal OE3 to be controlled by first grid respectively, upgrade with the pixel of choosing different lines.What deserves to be mentioned is that in other embodiment of the present invention, the number of grid drive chip is decided on the number of its number of pins and gate driving line, and the number of gate driving line is also different with the resolution of LCD.
Please also refer to Fig. 1 and 2, wherein Fig. 2 is a kind of signal timing diagram of the present invention's driving method.The present invention's driving method carries out the Data Update of the pixel of each row by the collocation of grid selection signal and operating clock pulse signal.Wherein, operating clock pulse signal LP for example is the locking polar signal, when operating clock pulse signal LP is in rising edge, source driving chip 120 is sent the pixel 112 of black signal to correspondence, and when operating clock pulse signal LP was in falling edge, 120 of source driving chips were sent the pixel 112 of normal image signal to correspondence.
As shown in Figure 2, in operating clock pulse signal LP in the clock period T 1, choose gate driving line G1 and gate driving line GN+1 respectively, wherein in the interval T1a of the very first time of T1 clock cycle, operating clock pulse signal LP is in rising edge, and source driving chip 120 is sent black signal.At this moment, first grid selects signal OE1 to be in rising edge, so gate driving line G1 is in closing state.In addition, because second grid selects signal OE2 to be in falling edge, so gate driving line GN+1 is in the state of unlatching, receiving black signal, and black signal write in the pixel 112 of N+1 row.In addition, in the second time interval T1b of T1 clock cycle, operating clock pulse signal LP is in falling edge, and source driving chip 120 is sent normal image signal.At this moment, grid selects signal OE1 to be in falling edge, so gate driving line G1 is in the state of unlatching, in the pixel 112 that normal image signal is write the 1st row, and because second grid selects signal OE2 to be in rising edge, so gate driving line GN+1 is in closing state.In like manner, in the interval T2a of the very first time of T2 clock cycle, upgrade gate driving line GN+2 with black signal, and in the second time interval T2b of T2 clock cycle, upgrade gate driving line G2 with normal image signal, the rest may be inferred.
Based on above-mentioned, the present invention's driving method is chosen a gate driving line respectively in two different gate driving line unit, and select the collocation of signal and operating clock pulse signal by grid, upgrade this two pixels that gate driving is online with black signal and normal image signal respectively.Thus, just can produce the effect that normal picture and black image alternately upgrade on LCD, reaching the purpose of image black plug, and then improve the dynamic display quality of LCD.
What deserves to be mentioned is that the foregoing description of the present invention writes black signal in the very first time interval of clock cycle, and writes normal image signal in second time interval of clock cycle, so will shorten the duration of charging of pixel relatively.In order to overcome the doubt of this duration of charging possibility deficiency, the present invention more adds the design of voltage preliminary filling in above-mentioned driving method, hereinafter describe at the LCD of single line counter-rotating (1-lineinversion) with two-wire counter-rotating two kinds of type of drive such as (2-line inversion) respectively.
Please refer to Fig. 3, Fig. 3 is a kind of signal timing diagram with driving method of voltage preliminary filling function of the present invention's preferred embodiment.Driving method shown in the present embodiment for example is used for the LCD of single line inversion driving, and when gate driving line G1 and GN+1 unlatching, gate driving line G3 and GN+3 also open simultaneously, to carry out the voltage preliminary filling action of same polarity.Wherein, when being in very first time interval T1a, simultaneously black signal is write gate driving line GN+1 and GN+3, and when being in the second time interval T1b, simultaneously normal image signal is write gate driving line G1 and G3, thus gate driving line G3 and GN+3 can be earlier clock cycle T1 carry out precharge with the voltage of same polarity.Thus, after entering T3 clock cycle, gate driving line G3 and GN+3 only need to continue to charge to the target current potential by resulting current potential among the clock cycle T1 and get final product, so can effectively avoid the doubt of undercharge.
In like manner, please refer to Fig. 4, Fig. 4 is the signal timing diagram that the another kind of the present invention's preferred embodiment has the driving method of voltage preliminary filling function.Driving method shown in the present embodiment for example is used for the LCD of two-wire inversion driving, and wherein owing to be the type of drive of two-wire counter-rotating, so gate driving line GL and GL+4 are by the driven (L is a positive integer) of identical polar.For example, when driving method of the present invention is opened in gate driving line G1 and GN+1, open gate driving line G5 and GN+5 simultaneously, so that gate driving line G5 and GN+5 are carried out the voltage preliminary filling, and pass downwards in regular turn and move, and then overcome the problem of possible undercharge.
From the above, the present invention is when choosing the gate driving line of desire renewal, also choose next bar gate driving line that preparation writes the normal image signal or the black signal of same polarity simultaneously, and when upgrading the gate driving line, this next bar gate driving line is carried out the voltage preliminary filling with normal image signal or black signal.What deserves to be mentioned is, two kinds of LCD such as single line counter-rotating that the foregoing description is carried and two-wire counter-rotating only are usefulness for example, in practical application, carry out the mode of choosing of the gate driving line of voltage preliminary filling and work as with the variation of type of drive different with the demand that designs.
The present invention's driving method can replace the effect of upgrading by normal picture on the LCD and black image, reach the purpose of image black plug, therefore help to eliminate the edge image retention that produces on the dynamic image, and then improve the display quality of the dynamic image of LCD.In addition, the present invention's driving method more can carry out the action of voltage preliminary filling to the pixel that is about to upgrade, so can effectively overcome the doubt of pixel possibility undercharge.
Though the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; the ordinary skill of any technical field that the present invention belongs to; in thought that does not break away from the present invention and scope; when can doing a little change and improvement, so the present invention's protection domain is as the criterion when looking claims person of defining.
Claims (7)
1. driving method, be suitable for driving LCD, it is characterized in that this LCD has most gate driving line unit, and each these gate driving line unit is made of bar gate driving line more than adjacent, and these gate driving line unit select signal to be controlled by grid respectively, and the compounding practice clock pulse signal writes voltage signal to this LCD, and this driving method comprises:
(a) choose gate driving line in the first grid drive wire unit and the gate driving line in the second grid drive wire unit;
(b) in the very first time interval of the clock cycle of this operating clock pulse signal, upgrade this gate driving line that is selected in this first grid drive wire unit with black signal;
(c) this operating clock pulse signal should second time interval of clock cycle in, upgrade this gate driving line that is selected in this second grid drive wire unit with normal image signal;
(d) under choosing in the first grid drive wire unit in gate driving line and the second grid drive wire unit under a gate driving line; And (e) repeating step (b) to step (d) repeatedly.
2. the driving method according to claim 1, it is characterized in that when choosing this gate driving line of this first grid drive wire unit, more comprise and choose next bar gate driving line that preparation writes the same polarity voltage signal simultaneously, and when upgrading this gate driving line, this next bar gate driving line is carried out the voltage preliminary filling with this black signal.
3. the driving method according to claim 2, it is characterized in that if the type of drive of this LCD is single line counter-rotating (1-line inversion), then when choosing the L bar gate driving line of this first grid drive wire unit, more comprise the L+2 bar gate driving line of choosing same polarity simultaneously, and when upgrading L bar gate driving line, L+2 bar gate driving line is carried out the voltage preliminary filling with this black signal.
4. the driving method according to claim 2, it is characterized in that if the type of drive of this LCD is two-wire counter-rotating (2-line inversion), then when choosing the L bar gate driving line of this first grid drive wire unit, more comprise the L+5 bar gate driving line of choosing same polarity simultaneously, and when upgrading L bar gate driving line, L+5 bar gate driving line is carried out the voltage preliminary filling with this black signal.
5. the driving method according to claim 1, it is characterized in that when choosing this gate driving line of this second grid drive wire unit, more comprise and choose next bar gate driving line that preparation writes the same polarity voltage signal simultaneously, and when upgrading this gate driving line, this next bar gate driving line is carried out the voltage preliminary filling with this normal image signal.
6. the driving method according to claim 5, it is characterized in that if the type of drive of this LCD is single line counter-rotating (1-line inversion), then when choosing the L bar gate driving line of this second grid drive wire unit, more comprise the L+2 bar gate driving line of choosing same polarity simultaneously, and when upgrading L bar gate driving line, L+2 bar gate driving line is carried out the voltage preliminary filling with this normal image signal.
7. the driving method according to claim 5, it is characterized in that if the type of drive of this LCD is two-wire counter-rotating (2-line inversion), then when choosing the L bar gate driving line of this second grid drive wire unit, more comprise the L+5 bar gate driving line of choosing same polarity simultaneously, and when upgrading L bar gate driving line, L+5 bar gate driving line is carried out the voltage preliminary filling with this normal image signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100806071A CN100365695C (en) | 2004-10-08 | 2004-10-08 | Driving method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100806071A CN100365695C (en) | 2004-10-08 | 2004-10-08 | Driving method |
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| Publication Number | Publication Date |
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| CN1758316A true CN1758316A (en) | 2006-04-12 |
| CN100365695C CN100365695C (en) | 2008-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2004100806071A Expired - Fee Related CN100365695C (en) | 2004-10-08 | 2004-10-08 | Driving method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101221715B (en) * | 2008-01-09 | 2010-10-06 | 友达光电股份有限公司 | Display equipment and its data control circuit and driving method |
| CN102054459A (en) * | 2010-12-27 | 2011-05-11 | 友达光电股份有限公司 | Driving method of liquid crystal display device |
| CN102376279A (en) * | 2010-08-12 | 2012-03-14 | 群康科技(深圳)有限公司 | Liquid crystal display device and driving method thereof |
| CN107507565A (en) * | 2017-09-28 | 2017-12-22 | 京东方科技集团股份有限公司 | Scanning signal generation method and device, display device |
| CN109599065A (en) * | 2017-10-03 | 2019-04-09 | 夏普株式会社 | The driving method of liquid crystal display device and liquid crystal display device |
| CN111508442A (en) * | 2020-05-20 | 2020-08-07 | 重庆京东方智慧电子系统有限公司 | Control method and display control device of electronic ink screen and electronic ink display device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0736406A (en) * | 1993-07-23 | 1995-02-07 | Seiko Epson Corp | Dot matrix display device and method for driving it |
| JP3556150B2 (en) * | 1999-06-15 | 2004-08-18 | シャープ株式会社 | Liquid crystal display method and liquid crystal display device |
| KR100705617B1 (en) * | 2003-03-31 | 2007-04-11 | 비오이 하이디스 테크놀로지 주식회사 | Liquid crystal driving device |
-
2004
- 2004-10-08 CN CNB2004100806071A patent/CN100365695C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101221715B (en) * | 2008-01-09 | 2010-10-06 | 友达光电股份有限公司 | Display equipment and its data control circuit and driving method |
| CN102376279A (en) * | 2010-08-12 | 2012-03-14 | 群康科技(深圳)有限公司 | Liquid crystal display device and driving method thereof |
| CN102376279B (en) * | 2010-08-12 | 2014-07-23 | 群康科技(深圳)有限公司 | Liquid crystal display device and driving method thereof |
| CN102054459A (en) * | 2010-12-27 | 2011-05-11 | 友达光电股份有限公司 | Driving method of liquid crystal display device |
| CN102054459B (en) * | 2010-12-27 | 2012-07-04 | 友达光电股份有限公司 | Driving method of liquid crystal display device |
| CN107507565A (en) * | 2017-09-28 | 2017-12-22 | 京东方科技集团股份有限公司 | Scanning signal generation method and device, display device |
| CN109599065A (en) * | 2017-10-03 | 2019-04-09 | 夏普株式会社 | The driving method of liquid crystal display device and liquid crystal display device |
| CN109599065B (en) * | 2017-10-03 | 2021-06-15 | 夏普株式会社 | Liquid crystal display device and method for driving liquid crystal display device |
| CN111508442A (en) * | 2020-05-20 | 2020-08-07 | 重庆京东方智慧电子系统有限公司 | Control method and display control device of electronic ink screen and electronic ink display device |
| CN111508442B (en) * | 2020-05-20 | 2021-03-26 | 重庆京东方智慧电子系统有限公司 | Control method and display control device of electronic ink screen and electronic ink display device |
| US11763764B2 (en) | 2020-05-20 | 2023-09-19 | Chongqing BOE Smart Electronics System Co., Ltd | Control method for electronic ink screen, display control apparatus, and electronic ink display apparatus |
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| Publication number | Publication date |
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| CN100365695C (en) | 2008-01-30 |
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Assignee: CPT Display Technology Shenzhen Ltd. Assignor: Chunghwa Picture Tubes Ltd. Contract fulfillment period: 2008.9.18 to 2013.9.18 Contract record no.: 2008990000655 Denomination of invention: Plasma display screen and drive method thereof Granted publication date: 20080130 License type: Exclusive license Record date: 20081010 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.9.18 TO 2013.9.18; CHANGE OF CONTRACT Name of requester: SHENZHEN HUAYING DISPLAY TECHNOLOGY CO., LTD. Effective date: 20081010 |
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