CN1648986A - Pixel driving circuit, time-sequence controller and scanning method - Google Patents
Pixel driving circuit, time-sequence controller and scanning method Download PDFInfo
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- CN1648986A CN1648986A CN 200510052759 CN200510052759A CN1648986A CN 1648986 A CN1648986 A CN 1648986A CN 200510052759 CN200510052759 CN 200510052759 CN 200510052759 A CN200510052759 A CN 200510052759A CN 1648986 A CN1648986 A CN 1648986A
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- 238000000034 method Methods 0.000 title claims abstract description 21
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Abstract
The present invention divides the scan lines of LCD into several groups, and proposes pixel driving circuit and scan method to scan the said scan lines synchronously within one scan period. Owing to the different frame data of different scan lines, the traditional scan mode can not regulate flexibly with the change and has limited improvement in reaction time and image quality. The present invention utilizes the frame cutting saved scan time in further image quality improving treatment.
Description
Technical field
The present invention relates to the pixel-driving circuit and the scan method of LCD, the sweep trace that relates in particular to LCD is divided into a plurality of groups, scans the pixel-driving circuit and the scan method of these many group sweep traces in the inter-sync of one scan cycle.
Background technology
In the field of LCD, how to improve frame update rate (frame rate) and liquid crystal reaction velocity, be the emphasis of development always.For conventional liquid crystal, if the frame update rate is 60Hz, and sweep trace always has 1080, and then average energy is used for pixel duration of charging of driven sweep line and has only 1/60th * 1080 second.Along with resolution requirements improves, the quantity increase of sweep trace, then short more for the time that pixel discharges and recharges, so image quality is not easy to improve more.
Fig. 1 is traditional a kind of pixel-driving circuit 100.This pixel-driving circuit 100 is divided into two groups up and down, and promptly the first half 106 and Lower Half 108 respectively comprise a plurality of sweep traces.First gate drive 102 is connected this first half 106 and Lower Half 108 accordingly with second gate drive 104, is used to control each bar sweep trace on it.The mode of first gate drive 102 and 104 gated sweeps of second gate drive wherein can be shown in the arrow among Fig. 1, and in each scan period, scanning sequency is to carry out line by line in regular turn from top to bottom, according to this circulation.
Because first gate drive 102 and second gate drive 104 one scan in the cycle sweep trace quantity of required processing be original half, can do extra processing so have more the time of half.Fig. 2 is traditional scanning sequence graph of a relation, is presented in the scan period (1 frame) 1080 driven orders of sweep trace in the LCD.Show that wherein 1080 scanning linears are divided into halves 106 and 108 up and down, each 540 sweep trace.Transverse direction is pulse signal GCK, and each drives a sweep trace respectively signal G1 to G540 and signal G541 to G1080.To G540, and the signal G541 of Lower Half 108 is to G1080, along with the vibration of GCK is opened in regular turn by the signal G1 that can find out the first half 106 among the figure.For instance, work as GCK=1, the first half 106 signal G1 open, and Lower Half 108 signal G541 open, and work as GCK=2, and the first half 106 signal G2 open, and Lower Half 108 signal G542 open, and the rest may be inferred.Therefore when GCK=540, just can finish the Lower Half driving of totally 1080 sweep traces, from GCK=541, from the beginning last Lower Half repeats above-mentioned action separately, all and cover the beginning.Because the frame data difference of each bar sweep trace, therefore traditional scan mode can't the elasticity adjustment along with the demand of data movement, and the effect of improving reaction time and image quality is limited.
Summary of the invention
The present invention is that the sweep trace with LCD is divided into many groups, and proposes pixel-driving circuit and scan methods at the described many group sweep traces of one scan cycle inter-sync scanning.
For LCD with multi-strip scanning line, described sweep trace is divided into the K group, each group comprises M bar sweep trace, and in the cycle, this K group sweep trace of synchronous scanning comprises the following step to scan method provided by the invention in one scan.K ordered series of numbers at first is provided, respectively comprises M element, described element be numbered 1 to M, a described K ordered series of numbers comprises ordered series of numbers S
1, this ordered series of numbers S
1In element arrange in regular turn from 1 to M, remove ordered series of numbers S in the described K ordered series of numbers
1All the other outer ordered series of numbers are determined putting in order of element numbering according to transfer function.Then described K ordered series of numbers interleaved set synthetic comprised the ordered series of numbers that K multiply by M element.Be scanning sequency with this ordered series of numbers at last, this K group sweep trace is scanned respectively synchronously.Wherein K is the natural number more than or equal to 2, and this transfer function will remove this ordered series of numbers S in the described K group ordered series of numbers according to this K group data-signal that sweep trace received
1All the other outer ordered series of numbers sort.
The present invention provides a kind of pixel-driving circuit in addition, is used for LCD, can be in the cycle in one scan, and synchronous scanning K organizes sweep trace, comprises K group gate drive, time schedule controller and frame memory.This K group gate drive drives one group of corresponding sweep trace respectively, and this time schedule controller connects described K group gate drive, is used to handle sequential and image data.This frame memory connects this time schedule controller, is used for temporary image data for sequential processing.And this time schedule controller is used to carry out above-mentioned scan method, produces scanning sequency for this corresponding K group sweep trace of this K group gate drive scanning.
The present invention provides above-mentioned time schedule controller in addition.
Description of drawings
Fig. 1 is traditional pixel-driving circuit 100;
Fig. 2 is traditional scanning sequence figure;
Fig. 3 is the scan method process flow diagram of one of embodiment of the invention;
Fig. 4 a is that the number of scans of one of embodiment of the invention lists intention;
Fig. 4 b is the scanning sequence figure of the present invention according to Fig. 4 a;
Fig. 4 c is that the number of scans of one of embodiment of the invention lists intention; And
Fig. 5 is a kind of pixel-driving circuit 500 of the embodiment of the invention.
Symbol description
100～pixel driving circuit, 106～first half
108～Lower Half, 102～the first gate drives
104～the second gate drives
500～pixel driving circuit, 502～time schedule controller
504～first half controller, 506～Lower Half controller
508～picture frame memory body
512～gate drive, 516～gate drive
514～data driver, 518～data driver
Embodiment
The present invention utilizes frame to cut apart the sweep time that the back is saved, and does further image improved treatment.Fig. 3 is the scan method process flow diagram of one of embodiment of the invention.At first, 1080 sweep trace groupings in the LCD, for example the first half 106 and Lower Half 108 respectively comprise 540 sweep traces.So in step 301, produce ordered series of numbers S
1With ordered series of numbers S
2, be used to set the scanning sequency of the first half 106 and Lower Half 108.This ordered series of numbers S1 and S
2540 elements that respectively comprise numbering 1 to 540.Then in step 303, calculate the arrangement of elements order of these two ordered series of numbers.Wherein first ordered series of numbers is: 1,2,3 ..., 538,539,540, be the integer ordered series of numbers of a natural increasing, and ordered series of numbers S
2Then be: 1+N, 2+N, 3+N ..., 538+N, 539+N, 540+N, be the ordered series of numbers of a translation N value, numbering subtracts 540 greater than 540, makes its value all be no more than 540.Wherein N is not more than 540 for a programmable integer, its value.Producing this ordered series of numbers S
1With ordered series of numbers S
2After, in step 305, with the synthetic ordered series of numbers that comprises 1080 elements of these two ordered series of numbers interleaved set.Therefore the combined result of ordered series of numbers is as follows: 1,1+N, 2,2+N, 3,3+N ..., 538,538+N, 539,539+N, 540,540+N.At last, in step 307, be scanning sequency with this ordered series of numbers, each 540 sweep trace of halves are up and down scanned synchronously.Therefore, in the cycle (time frame), for 540 sweep traces of the first half 106 and Lower Half 108, same sweep trace all can be scanned twice in one scan, and this time interval of twice is then determined by the N value.
Fig. 4 a is one of embodiment of scanning sequency.LCD has 1080 sweep traces, is divided into two parts up and down, respectively comprises 540 sweep traces.Ordered series of numbers S
1Comprise 540 elements, be in regular turn 1,2,3 ..., 540}.Ordered series of numbers S
2Comprising 540 elements, is { (N+1) %540, (N+2) %540, (N+3) %540......, (N+540) %540} in regular turn.N wherein represents one to be not more than 540 integer, and its physical significance is that same sweep trace is by the time interval of twice scanning." % " symbology delivery (mod) wherein is in order to be limited to the value in the ordered series of numbers between 1 to 540.In this example, so N=536 is the ordered series of numbers S that obtains
2So that 537,538,539 ..., 536}.Therefore, by ordered series of numbers S
1And S
2Among the scanning sequency SCAN# that makes up and get 1080 elements are arranged, be in regular turn 1,537,2,538,3,539,4,540,5,1,6,2 ... and 540,536}.The first half 106 and Lower Half 108 just scan 540 sweep traces of its correspondence according to this scanning sequency SCAN# respectively.
In another embodiment, so N=270 is the ordered series of numbers S that obtains
2For 271,272,273 ..., 540,1 ..., 270}.Therefore, by ordered series of numbers S
1And S
2Among the scanning sequency SCAN# that makes up and get 1080 elements are arranged, be in regular turn 1,271,2,272,3,273,4,274,5,275 ... and 540,270}.The first half 106 and Lower Half 108 just scan 540 sweep traces of its correspondence according to this scanning sequency SCAN# respectively.
In another embodiment, so N=135 is the ordered series of numbers S that obtains
2For 136,137,138 ..., 540,1 ... 135}.Therefore, by ordered series of numbers S
1And S
2Among the scanning sequency SCAN# that makes up and get 1080 elements are arranged, be in regular turn 1,136,2,137,3,138,4,139,5,140 ... and 540,135}.The first half 106 and Lower Half 108 just scan 540 sweep traces of its correspondence according to this scanning sequency SCAN# respectively.
Fig. 4 b is the signal timing diagram according to the scanning sequency gained of Fig. 4 a.The sweep trace opening sequence of the first half 106 and Lower Half 108 is decided according to above-mentioned scanning sequency SCAN#.For example, when GCK=1, the signal G1 of the first half 106 opens, and the signal G541 of Lower Half 108 opens.And when GCK=2, the signal G537 of the first half 106 opens, and the signal G1077 of Lower Half 108 opens.It is remaining that the rest may be inferred.The type of drive that this shows sweep trace presents staggered rule of jumping, and between a scan period (GCK=1 to 1080), each sweep trace can be unlocked twice, and this time interval of twice can be determined according to the described method of Fig. 3.
The present invention is not limited to 1080 sweep traces in the LCD is divided into halves up and down, also can be to be divided into four groups or eight groups.If 1080 sweep traces are divided into four groups, respectively comprise 270 sweep traces, four ordered series of numbers that contain 270 elements then can be provided, carry out meticulousr scheduling calculation after, be combined into an ordered series of numbers that contains 1080 elements, four groups to this LCD scan simultaneously, each sweep trace can be scanned four times in a scan period by this, and each time interval, and the data value of each output, can calculate through accurate, carry out high-precision fine setting according to the picture demand.For instance, the arrangement of elements mode of these four ordered series of numbers, ordered series of numbers S
1With ordered series of numbers S
2Can be identical with a last embodiment, and ordered series of numbers S
3With ordered series of numbers S
4, can calculate the cumulative data amount decision of every sweep trace according to the image data of continuous a plurality of scan periods.Therefore the data volume of some sweep trace is bigger, and the data volume of some sweep trace is less, gives sweep time in the cycle four times in one scan, but the mat time interval different or even apply the adjustment of voltage are more strengthened display effect.For general pixel, the voltage difference that applies is high more, and liquid crystal reverses fast more.Reverse in order to quicken liquid crystal, dwindle the pixel reaction time, can when scanning for the first time, apply superpotential (over voltage), and apply normal voltage in the scanning of (afterwards) for the second time.The present invention can reach better effect in conjunction with this method.
Fig. 4 c is another embodiment of scanning sequency, provides ordered series of numbers S equally
1And S
2, ordered series of numbers S wherein
1With above-mentioned embodiment, comprise 540 elements, be in regular turn 1,2,3 ..., 540}.Ordered series of numbers S
2Then be defined as { X
1, X
2, X
3... X
538, X
539, X
540, its value can be to be pushed away by a hash function, mapping (one-to-one) allows every sweep trace be driven secondary fifty-fifty in this scan period in numeral 1 to 540.This ordered series of numbers S
2Also can be to determine every online cumulative data amount of scanning according to the image data of continuous a plurality of scan periods, or a simple linear transformation function.Its spiritual place is kind in reaction time of improving pixel unnecessary sweep time and image quality.The scanning sequency SCAN# that is produced just can have the staggered variation that elasticity is set by this.
Fig. 5 is a kind of pixel-driving circuit 500, is used to be divided into the LCD of the first half 106 and Lower Half 108.Core is a time schedule controller 502, connects first half controller 504 and Lower Half controller 506, is responsible for handling sequential and image data.These first half 106 controllers are responsible for controlling first half gate drive 512 and first half data driver 514.And this Lower Half controller is responsible for controlling Lower Half gate drive 516 and Lower Half data driver 518.540 sweep traces of last Lower Half processing out of the ordinary.Still comprise a frame internal memory 508 in addition, connect this time schedule controller 502,, can keep in image data for sequential processing as a kind of impact damper (buffer).The function that comprises scheduling in this time schedule controller 502, by gate drive 512 and 516, control is the driving order of two groups of sweep traces up and down.Wherein this time schedule controller 502 can produce two ordered series of numbers, respectively comprises to be numbered 540 elements of 1 to 540.The ordered series of numbers that then again these two ordered series of numbers interleaved set synthetic is comprised 1080 elements is for example at the scanning sequency SCAN# shown in Fig. 4 a.And this time schedule controller 502 is according to this scanning sequency SCAN#, control is two group controllers 504 and 506 up and down,, synchronously two groups of gate drives 512 and 516 about this are scanned in the cycle in one scan, simultaneously, image data is also relative delivers to up and down in two groups of data drivers 514 and 518.So pixel-driving circuit 500 of the present invention, one of its characteristics are that time schedule controller 502 has the scheduling function that can calculate scanning sequency.Though in the present embodiment frame is cut into two parts processing up and down, yet also can is to be divided into four groups or eight groups.Therefore the quantity of gate drive can increase relatively, and is controlled in conjunction with the scheduling function by time schedule controller 502.
In sum, the present invention utilizes the multiframe scan method and the driving circuit of frame cutting, solves that pixel discharges and recharges not enough problem in traditional high-resolution panel.Under the situation that does not reduce sweep time, accelerated the speed of liquid crystal reaction.
Though the present invention with preferred embodiment openly as above; so it is not to be used to limit scope of the present invention, any present technique field personnel, without departing from the spirit and scope of the present invention; when can making various variations and modification, so protection scope of the present invention is as the criterion with the qualification of appending claims.
Claims (15)
1, a kind of scan method is used to have the LCD of K group sweep trace, comprising:
K ordered series of numbers S is provided
1To S
K
According to described ordered series of numbers S
1To S
K, determine scanning sequency; And
According to described scanning sequency, in the one scan cycle (time frame), the described K group of synchronous scanning sweep trace,
Wherein, K is one more than or equal to 2 integer.
2, scan method as claimed in claim 1, wherein:
Each group number of scanning lines comprises M bar sweep trace at least;
K ordered series of numbers S is provided
1To S
KStep, comprise:
Provide K shift value, N
1, N
2..., N
K, described shift value is the integer that is not more than M;
According to described shift value, determine described ordered series of numbers S
1To S
K
Determine the step of described scanning sequency, comprise: first element S of getting each ordered series of numbers in regular turn
1(1), S
2(1) ..., S
K(1), second element S of each ordered series of numbers
1(2), S
2(2) ..., S
K(2) ..., reach M element S to each ordered series of numbers
1(M), S
2(M) ..., S
K(M) K * M element formed described scanning sequency altogether.
3, scan method as claimed in claim 2 wherein provides the step of K shift value, comprises according to this liquid crystal to show the frame characteristic that display is shown and determine described shift value in real time.
4, scan method as claimed in claim 2, wherein ordered series of numbers S
iIn element S
i(1), S
i(2), S
i(3) ..., S
i(M) value is (1+N in regular turn
i) to (M+N
i) (mod M), i=1 is to K.
5, scan method as claimed in claim 4, wherein:
Shift value N
1Equal zero; And
Shift value N
2To N
KRatio according to M value and K value is determined.
6, a kind of time schedule controller is used to comprise the LCD of multi-strip scanning line, wherein:
Described time schedule controller is divided into the K group with described sweep trace, and K ordered series of numbers S is provided
1To S
K, to determine scanning sequency;
Described time schedule controller is according to described scanning sequency, and in the one scan cycle (time frame), the described K of synchronous scanning organizes sweep trace; And
K is one more than or equal to 2 integer.
7, time schedule controller as claimed in claim 6, wherein:
Each group number of scanning lines comprises M bar sweep trace at least;
Described time schedule controller further provides K shift value, N
1, N
2..., N
K, described shift value is the integer that is not more than M;
According to described shift value, determine described ordered series of numbers S
1To S
KAnd
Get first element S of each ordered series of numbers in regular turn
1(1), S
2(1) ..., S
K(1), second element S of each ordered series of numbers
1(2), S
2(2) ..., S
K(2) ..., reach M element S to each ordered series of numbers
1(M), S
2(M) ..., S
K(M) K * M element formed this scanning sequency altogether.
8, time schedule controller as claimed in claim 7, wherein said time schedule controller are determined described shift value in real time according to the shown frame characteristic of this LCD.
9, time schedule controller as claimed in claim 7, wherein ordered series of numbers S
iIn element S
i(1), S
i(2), S
i(3) ..., S
i(M) value is (1+N in regular turn
i) to (M+N
i) (mod M), i=1 is to K.
10, time schedule controller as claimed in claim 9, wherein:
Shift value N
1Equal zero; And
Shift value N
2To N
KRatio according to M value and K value is determined.
11, a kind of pixel-driving circuit is used for LCD, can be in the cycle in one scan, and synchronous scanning K organizes sweep trace, comprises:
K organizes gate drive, is used for driving respectively one group of corresponding sweep trace;
Time schedule controller connects described K group gate drive, is used to handle sequential and image data;
Frame memory connects described time schedule controller, is used for temporary image data for sequential processing;
Wherein:
Described time schedule controller provides K ordered series of numbers S
1To S
K, to determine scanning sequency;
Described K group gate drive is according to this scanning sequency, and in the one scan cycle (time frame), the described K of synchronous scanning organizes sweep trace; And
K is the integer more than or equal to 2.
12, pixel-driving circuit as claimed in claim 11, wherein:
Each group number of scanning lines comprises M bar sweep trace at least;
Described time schedule controller further provides K shift value, N
1, N
2... N
K, described shift value is the integer that is not more than M; According to described shift value, determine described ordered series of numbers S
1To S
KAnd first element S of getting each ordered series of numbers in regular turn
1(1), S
2(1) ..., S
K(1), second element S of each ordered series of numbers
1(2), S
2(2) ..., S
K(2) ..., reach M element S to each ordered series of numbers
1(M), S
2(M) ..., S
K(M) K * M element formed described scanning sequency altogether.
13, pixel-driving circuit as claimed in claim 12, wherein said time schedule controller determines described shift value in real time according to the shown frame characteristic of this LCD.
14, pixel-driving circuit as claimed in claim 12, wherein ordered series of numbers S
iIn element S
i(1), S
i(2), S
i(3) ..., S
i(M) value is (1+N in regular turn
i) to (M+N
i) (mod M), i=1 is to K.
15, pixel-driving circuit as claimed in claim 14, wherein:
Shift value N
1Equal zero; And
Shift value N
2To N
KRatio decision according to M value and K value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100527595A CN100437728C (en) | 2005-03-14 | 2005-03-14 | Pixel driving circuit, time-sequence controller and scanning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100527595A CN100437728C (en) | 2005-03-14 | 2005-03-14 | Pixel driving circuit, time-sequence controller and scanning method |
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| Publication Number | Publication Date |
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| CN1648986A true CN1648986A (en) | 2005-08-03 |
| CN100437728C CN100437728C (en) | 2008-11-26 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101266745B (en) * | 2008-05-05 | 2010-04-14 | 友达光电股份有限公司 | A display device and its driving method |
| CN101256758B (en) * | 2008-04-11 | 2010-08-18 | 友达光电股份有限公司 | Drive method of liquid crystal display panel and LCD thereof |
| CN101866607A (en) * | 2009-04-20 | 2010-10-20 | 三星电子株式会社 | Display device and manufacture method thereof |
| CN101399012B (en) * | 2007-09-24 | 2011-12-14 | 比亚迪股份有限公司 | Dynamic drive method and device of LCD |
| CN106896594A (en) * | 2017-02-22 | 2017-06-27 | 深圳市华星光电技术有限公司 | A kind of driving method of liquid crystal display panel |
| WO2018036085A1 (en) * | 2016-08-25 | 2018-03-01 | 深圳市华星光电技术有限公司 | Oled pwm digital driving method and circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000322032A (en) * | 1999-05-10 | 2000-11-24 | Sharp Corp | Driving method for planar display |
| WO2001052229A1 (en) * | 2000-01-14 | 2001-07-19 | Matsushita Electric Industrial Co., Ltd. | Active matrix display apparatus and method for driving the same |
| GB0030592D0 (en) * | 2000-12-15 | 2001-01-31 | Koninkl Philips Electronics Nv | Active matrix device with reduced power consumption |
| JP3653506B2 (en) * | 2002-03-20 | 2005-05-25 | 株式会社日立製作所 | Display device and driving method thereof |
| KR100925453B1 (en) * | 2002-08-02 | 2009-11-06 | 삼성전자주식회사 | A Liquid Crystal Display and A Driving Method Thereof |
| JP2004341371A (en) * | 2003-05-19 | 2004-12-02 | Toppoly Optoelectronics Corp | Driving method and circuit for liquid crystal display and liquid crystal display |
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| CN101399012B (en) * | 2007-09-24 | 2011-12-14 | 比亚迪股份有限公司 | Dynamic drive method and device of LCD |
| CN101256758B (en) * | 2008-04-11 | 2010-08-18 | 友达光电股份有限公司 | Drive method of liquid crystal display panel and LCD thereof |
| CN101266745B (en) * | 2008-05-05 | 2010-04-14 | 友达光电股份有限公司 | A display device and its driving method |
| CN101866607A (en) * | 2009-04-20 | 2010-10-20 | 三星电子株式会社 | Display device and manufacture method thereof |
| US8629827B2 (en) | 2009-04-20 | 2014-01-14 | Samsung Display Co., Ltd. | Display device and method of manufacturing the same |
| CN101866607B (en) * | 2009-04-20 | 2016-04-06 | 三星显示有限公司 | Display device and manufacture method thereof |
| WO2018036085A1 (en) * | 2016-08-25 | 2018-03-01 | 深圳市华星光电技术有限公司 | Oled pwm digital driving method and circuit |
| CN106896594A (en) * | 2017-02-22 | 2017-06-27 | 深圳市华星光电技术有限公司 | A kind of driving method of liquid crystal display panel |
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