CN102163405A - Method for controlling signal of scanning line of display - Google Patents
Method for controlling signal of scanning line of display Download PDFInfo
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- CN102163405A CN102163405A CN2011101431468A CN201110143146A CN102163405A CN 102163405 A CN102163405 A CN 102163405A CN 2011101431468 A CN2011101431468 A CN 2011101431468A CN 201110143146 A CN201110143146 A CN 201110143146A CN 102163405 A CN102163405 A CN 102163405A
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Abstract
The invention provides a method for controlling a signal of a scanning line of a display. The method comprises the following steps: corresponding to a picture to be displayed, dividing the scanning time of a picture into N scanning periods according to the sequence in which the scanning lines are arranged, wherein the initial time point of each scanning period is T(N), N is a positive integer which is more than or equal to 1; and subsequently, at a time point T'(M) in the Nth scanning period, enabling an Mth scanning line within the Nth scanning period one by one in the sequence that the scanning lines are arranged, thus pixels corresponding to the scanning lines are charged, wherein M is a positive integer more than or equal to 1, the scanning time of the Mth scanning line comprises an enabling time point T'(M), delay time K*DetaT and charging time Tc, and K is equal to M-1, and the enabling time point of the Mth scanning line T'(M) is equal to T(N) + KDetaT. By applying the method provided by the invention, the situation that a colour checkerboard is produced in a display frame owning to the traditional signal control method can be effectively alleviated.
Description
Technical field
The invention relates to signal control, the specific scanning of a display line signal control method that relates to.
Background technology
In recent years, the development of imaging technique is maked rapid progress, and makes that volume is thin, in light weight and has LCD (the Liquid Crystal Display of low electromagnetic; LCD), become the display main product gradually.
Liquid crystal panel is made up of a plurality of pixels (pixel) of arranging with matrix form.Control the brightness of pixel by the image data of each pixel of feed-in respectively, make whole liquid crystal panel display frame.Because pixel is can only show by bright to dark GTG, therefore need come Show Color according to this by other mode.
A kind of traditional LCD is to utilize colored filter and the three primary colors composition that shows a picture element simultaneously, thereby demonstrates color.A picture element of this kind colored filter LCD is by three combination of pixels, corresponds to red, green and blue color filter respectively.Human eye receives red, the green and blue light that sees through optical filter and demonstrate, and its mixing can be experienced the color of this picture element.
Another kind of traditional LCD is to be color sequential liquid crystal display, and it shows three former colour contents of a picture element and present color with fixing figure field turnover rate successively.
As shown in Figure 9, traditional color sequential liquid crystal display is to adopt to open three sweep traces simultaneously, and the mode of closing three sweep traces is simultaneously come the signal of gated sweep line.Yet the signal control method of the color sequential display that this is traditional exists some problems.
Shown in 9 figure, as the sweep trace (G of first picture element
11) when closing, the sweep trace (G of second picture element
12) also close, so the coupling effect of first picture element to second picture element can take place, make second picture element produce coupling capacitance.Sweep trace (G when second picture element
12) when closing, the sweep trace (G of the 3rd picture element
13) also close, so second picture element also can produce coupling effect to the 3rd picture element, make the 3rd picture element produce coupling capacitance.Because the top of first picture element has not had other picture element, therefore second picture element and the 3rd picture element all have coupling capacitance C1 shown in 9 figure, and first picture element there is no coupling capacitance C1 generation at the opposite side in contrast to second picture element.
In like manner, as the sweep trace (G of the 4th picture element
14) when closing, the sweep trace (G of the 5th picture element
15) also close, so the coupling effect of the 4th picture element to the 5th picture element can take place, make the 5th picture element produce coupling capacitance.Sweep trace (G when the 5th picture element
15) when closing, the sweep trace (G of the 6th picture element
16) also close, so the 5th picture element also can produce coupling effect to the 6th picture element, make the 6th picture element produce coupling capacitance.Because the sweep trace (G of the 4th picture element
14) top there is no other picture element when closing sweep trace closes, therefore the 5th picture element and the 6th picture element all have coupling capacitance (C1) shown in 9 figure, and the 4th picture element there is no coupling capacitance (C1) at the opposite side in contrast to the 5th picture element and produces.
Therefore cause each picture element coupling effect difference, the coupling capacitance that has is also inequality, causes the uneven phenomenon of pixel voltages, and then impels display frame to produce the abnormal case of colored gridiron pattern phenomenon.
Hereat, still need a technical scheme that can solve above-mentioned pixel voltages inequality phenomenon now.
Summary of the invention
For solving the unequal problem of above-mentioned pixel voltages, the present invention provides a kind of scanning of a display line signal control method.
In an aspect, the present invention provides a kind of scanning of a display line signal control method.This method comprises corresponding to desiring picture displayed, and the sequencing that arranged according to sweep trace the sweep time of above-mentioned picture is divided into N scan period.The initial time point of each scan period is T (N), and N is the positive integer more than or equal to 1.Continue, in (M) time point of the T ' of N in the scan period, the sequencing of arranging according to sweep trace open one by one N in the scan period M bar sweep trace so that the picture element of those sweep trace correspondences charge.M is the positive integer more than or equal to 1.Comprise the sweep time of above-mentioned M bar sweep trace open time point T ' (M), time delay K * △ T and duration of charging Tc, and K=M-1.The unlatching time point of the scanning of M bar sweep trace be T ' (M)=T (N)+K * △ T.
One of the present invention advantage is to cause the colored gridiron pattern phenomenon that produces in the display frame for this scanning of a display line signal control method can improve traditional signal control method effectively.
This advantage and other advantage are from the narration of following preferred embodiment and follow back accompanying drawing formula and claim will make the reader know understanding the present invention.
Description of drawings
Fig. 1 shows scanning of a display line signal sequential control figure according to one embodiment of the invention.
Fig. 2 is the process flow diagram that shows scanning of a display line signal control method according to one embodiment of the invention.
Fig. 3 is the process flow diagram that shows scanning of a display line signal control method according to one embodiment of the invention.
Fig. 4 shows scanning of a display line signal sequential control figure according to another embodiment of the present invention.
Fig. 5 is the process flow diagram that shows scanning of a display line signal control method according to another embodiment of the present invention.
Fig. 6 is the process flow diagram that shows scanning of a display line signal control method according to another embodiment of the present invention.
Fig. 7 is the synoptic diagram that shows the voltage that display the produced distribution of using traditional signal control method.
Fig. 8 is the synoptic diagram that shows the voltage distribution that this scanning of a display of use line signal control method is produced according to one embodiment of the invention.
Fig. 9 is the sweep trace signal sequential control figure that shows the traditional colour sequential display.
[primary clustering symbol description]
201～212 steps
301～316 steps
The C1 coupling capacitance
C2 electric capacity
G
1~ G
MSweep trace
G '
1~ G '
MSweep trace
G
11~ G
16Sweep trace
T
1The first initial time point
T
2The second initial time point
T
3The 3rd initial time point
T
NThe initial time point of N
△ t time delay
Embodiment
The present invention will be narrated with preferred embodiment and aspect, and this type of narration is to explain structure of the present invention and program, only in order to explanation but not in order to limit claim of the present invention.Therefore, the preferred embodiment in instructions, the present invention also can extensively be rendered among other embodiment.
The present invention provides a kind of scanning of a display line signal control method, and it can be used for color sequential display.
As shown in Figure 1, the present invention is with the sweep trace opening time and the time delay (△ t) that postpones one section equal proportion increase out of the ordinary shut-in time of each picture element after first picture element in each cycle of sweep trace control, with the unlatching and the shut-in time of the sweep trace of each picture element that staggers, the unequal phenomenon of the pixel voltages that sweep trace caused of opening and closing three picture elements in traditional sequential control method is simultaneously improved.
Wherein, if size, characteristic, the material of each picture element is all identical, then (Tc) is also identical the duration of charging of each picture element.Otherwise all different as if size, characteristic, the material of each picture element, then the duration of charging of each picture element (Tc) is all different.And the duration of charging (Tc) is greater than the time delay (△ t) of maximum multiple.In a preferred embodiment, the duration of charging can be shown in following formula:
（1）
In the embodiment of Fig. 1, the size of each picture element is for identical, so the duration of charging of each picture element (Tc) is also identical.In an embodiment, the duration of charging (Tc) must all can reach the charging state of saturation to guarantee each picture element more than or equal to the minimum duration of charging of each picture element, avoids taking place the problem of liquid crystal understeer by this.The minimum duration of charging is factors such as the size that depends on picture element, material.
The present invention can open and close the sweep trace more than two respectively in each cycle length, add that the duration of charging (Tc) is less than working as time scan period time value the time delay of maximum multiple (△ t).
As shown in Figures 1 and 2, in a preferable specific embodiment, must open and close the sweep trace of three picture elements in each time scan period respectively.As shown in Figure 1, the sequencing of sweep time through arranging according to sweep trace of desire picture displayed is divided into N scan period.Central N is the positive integer more than or equal to 1.The initial time point of first scan period is T
1(to call the first beginning time point in the following text), the initial time point of second scan period is T
2(to call the second initial time point in the following text), by that analogy and the initial time point of N scan period is T
N(to call the initial time point of N in the following text).Should attention person be, present embodiment be only in order to explanation the present invention, but not in order to limit the present invention.In step 201, in the first initial time point (T
1) open article one sweep trace (G of period 1
1).
In step 202, add that in the first initial time point be T time delay
1The time point of+△ t is opened the second sweep trace (G of period 1
2).Time delay, (△ t) depended on the size of coupling capacitance, if the coupling capacitance between picture element is big more, then time delay, (△ t) was big more, and it is good more that time delay (△ t), big more then coupling capacitance was eliminated effect.
In step 203, add that in the first initial time point twice time delay is T
1The time point of+2 △ t is opened the 3rd the sweep trace (G of period 1
3).
In step 204, add that in the first initial time point duration of charging is T
1The time point of+Tc is closed article one sweep trace (G of period 1
1).
In step 205, add that in the first initial time point time delay and duration of charging are T
1The time point of+△ t+Tc is closed the second sweep trace (G of period 1
2).
In step 206, add that in the first initial time point twice time delay and duration of charging are T
1The time point of+2 △ t+Tc is closed the 3rd the sweep trace (G of period 1
3).Above-mentioned each bar sweep trace is corresponding at least one picture element.
In the foregoing description, open the sweep trace of three picture elements in first time scan period, if total sweep trace quantity is 900, the picture frame renewal rate is 60 hertz (Hz), each picture element all can comprise the colour field of red (R), green (G), blue (B).Be 1/ ((900/3) * 3 * 60) second then according to the duration of charging (Tc) among this embodiment of above-mentioned formula (1), promptly 1.852 * 10
-5Second.
In an embodiment, T
2Deduct T
1Value be the value that adds 2 △ t more than or equal to Tc.
As Fig. 1 and shown in Figure 3,, be T in the second initial time point in step 207
2Time point, open second round article one sweep trace (G '
1).
In step 208, add that in the second initial time point be T time delay
2The time point of+△ t, open second round the second sweep trace (G '
2).
In step 209, add that in the second initial time point twice time delay is T
2The time point of+2 △ t, open second round the 3rd sweep trace (G '
3).
In step 210, add that in the second initial time point duration of charging is T
2The time point of+Tc, close second round article one sweep trace (G '
1).
In step 211, add that in the second initial time point time delay and duration of charging are T
2The time point of+△ t+Tc, close second round the second sweep trace (G '
2).
In step 212, add that in the second initial time point twice time delay and duration of charging are T
2The time point of+2 △ t+Tc, close second round the 3rd sweep trace (G '
3).Above-mentioned each bar sweep trace is corresponding at least one picture element.
In the foregoing description, each picture element all can comprise red (R), green (G), blue (B) colour field.
In an embodiment, T
3Deduct T
2Value be the value that adds 2 △ t more than or equal to Tc.
In the 3rd initial time point (T
3) then repeat according to the above-mentioned steps rule afterwards, so do not repeat to give unnecessary details.
As Fig. 4 and shown in Figure 5, in another embodiment, must open and close the sweep trace of M picture element in each cycle length respectively.Central M is the positive integer more than or equal to 1.As shown in Figure 4, the sequencing of sweep time through arranging according to sweep trace of desire picture displayed is divided into N scan period.Central N is the positive integer more than or equal to 1.The initial time point of first scan period is T
1(to call the first beginning time point in the following text), the initial time point of second scan period is T
2(to call the second initial time point in the following text), by that analogy and the initial time point of N scan period is T
N(to call the initial time point of N in the following text).Should attention person be, present embodiment be only in order to explanation the present invention, but not in order to limit the present invention.In step 301, in the first initial time point (T
1) open article one sweep trace (G of period 1
1).
In step 302, add that in the first initial time point be T time delay
1The time point of+△ t is opened the second sweep trace (G of period 1
2).Time delay, (△ t) depended on the size of coupling capacitance, if the coupling capacitance between picture element is big more, then time delay, (△ t) was big more, and it is good more that time delay (△ t), big more then coupling capacitance was eliminated effect.
In step 303, add that in the first initial time point twice time delay is T
1The time point of+2 △ t is opened the 3rd the sweep trace (G of period 1
3).
Repeat above-mentioned steps afterwards in regular turn to step 304, add that in the first initial time point be T K times of time delay
1The time point of+K △ t is opened the M bar sweep trace (G of period 1
M).Wherein, K=M-1.
In step 305, add that in the first initial time point duration of charging is T
1The time point of+Tc is closed article one sweep trace (G of period 1
1).
In step 306, add that in the first initial time point time delay and duration of charging are T
1The time point of+△ t+Tc is closed the second sweep trace (G of period 1
2).
In step 307, add that in the first initial time point twice time delay and duration of charging are T
1The time point of+2 △ t+Tc is closed the 3rd the sweep trace (G of period 1
3).
Repeat above-mentioned steps afterwards in regular turn to step 308, add that in the first initial time point K times of time delay and duration of charging are T
1The time point of+K △ t+Tc is closed the M bar sweep trace (G of period 1
M).Wherein, K=M-1.Above-mentioned each bar sweep trace is corresponding at least one picture element.
In the above embodiments, each picture element all can comprise red (R), green (G), blue (B) colour field.
In an embodiment, T
2Deduct T
1Value be the value that adds K △ t more than or equal to Tc.
As Fig. 4 and shown in Figure 6, in step 309, in the second initial time point (T
2) open second round article one sweep trace (G '
1).
In step 310, add that in the second initial time point be T time delay
2The time point of+△ t, open second round the second sweep trace (G '
2).
In step 311, add that in the second initial time point twice time delay is T
2The time point of+2 △ t, open second round the 3rd sweep trace (G '
3).
Repeat above-mentioned steps afterwards in regular turn to step 312, add that in the second initial time point be T K times of time delay
2The time point of+K △ t, open second round M bar sweep trace (G '
M).
In step 313, add that in the second initial time point duration of charging is T
2The time point of+Tc, close second round article one sweep trace (G '
1).
In step 314, add that in the second initial time point time delay and duration of charging are T
2The time point of+△ t+Tc, close second round the second sweep trace (G '
2).
In step 315, add that in the second initial time point twice time delay and duration of charging are T
2The time point of+2 △ t+Tc, close second round the 3rd sweep trace (G '
3).
Repeat above-mentioned steps afterwards in regular turn to step 316, add that in the second initial time point K times of time delay and duration of charging are T
2The time point of+K △ t+Tc, close second round M bar sweep trace (G '
M).Above-mentioned each bar sweep trace is corresponding at least one picture element.
In the above embodiments, each picture element all can comprise red (R), green (G), blue (B) colour field.
In an embodiment, T
3Deduct T
2Value be the value that adds K △ t more than or equal to Tc.
In the 3rd initial time point (T
3) then repeat according to the above-mentioned steps rule afterwards, so do not repeat to give unnecessary details.
As mentioned above, in each cycle length, the opening time of the sweep trace of each picture element after first picture element and shut-in time are all postponed and are staggered mutually.
So when the sweep trace of first picture element is closed, the sweep trace of second picture element still is an opening, and the sweep trace of first picture element can significantly reduce because the sweep trace of second picture element is in charge condition when the sweep trace of first picture element is closed the coupling effect of the sweep trace of second picture element by this.
In like manner, when the sweep trace of second picture element was closed, its coupling effect to the sweep trace of the 3rd picture element also can greatly reduce, even can ignore.
Hereat, opening time point and shut-in time point by the sweep trace that utilizes (△ t) each picture element that staggers time delay, coupling capacitance between picture element is reduced, and remove the unequal phenomenon of adjacent pixel voltages, so avoid display for example color sequential display device colored gridiron pattern phenomenon appears.
For example, resolution with 1600*900 is example, traditionally under the situation that red (R), green (G) of color sequential display, blue (B) three sweep traces are opened simultaneously, the duration of charging Tc of sweep trace is 1/ (300*3*60) second, the unequal pixel voltages that distributes as can producing as shown in Figure 7 so will produce colored gridiron pattern phenomenon.And after the sweep trace opening time of each picture element after first picture element and shut-in time add △ t time delay (2 μ s) as mentioned above respectively, can produce as shown in Figure 8 as average voltage distribute, make colored gridiron pattern phenomenon be significantly improved.
Above-mentioned narration is to be preferred embodiment of the present invention.The skill person in this field is deserved to be in order to explanation the present invention but not in order to limit the patent right scope that the present invention was advocated to understand it.Its scope of patent protection when on accompanying claim and etc. same domain decide.All skill persons who is familiar with this field, in not breaking away from this patent spirit or scope, the change of doing or retouching all belong to the equivalence of being finished under the disclosed spirit and change or design, and should be included in the following claim.
Claims (7)
1. a scanning of a display line signal control method is characterized in that, comprises the following step:
Corresponding to a desire picture displayed, the sequencing that arranged according to a plurality of sweep traces the sweep time of this picture is divided into N scan period, and the initial time point of each those scan period is T (N), and N is the positive integer more than or equal to 1;
In (M) time point of the T ' of N in the scan period, open the M bar sweep trace of this N in the scan period one by one according to the sequencing that those sweep traces are arranged, so that the picture element of those sweep trace correspondences charges, M is the positive integer more than or equal to 1; And
Wherein comprise one the sweep time of this M bar sweep trace and open time point T ' (M), a time delay a K * △ T and a duration of charging Tc, and K=M-1, this unlatching time point of the scanning of this M bar sweep trace be T ' (M)=T (N)+K * △ T.
2. scanning of a display line signal control method as claimed in claim 1 is characterized in that, more comprises the following step:
In this T of N in the scan period " (P) time point; close this N this M bar sweep trace in the scan period one by one according to the sequencing that sweep trace is arranged; P is the positive integer more than or equal to 1, and wherein the time point of closing of this M bar sweep trace is T " (P)=T (N)+K * △ T+Tc.
3. scanning of a display line signal control method as claimed in claim 1 is characterized in that, wherein the corresponding at least one picture element of this M bar sweep trace respectively.
4. scanning of a display line signal control method as claimed in claim 3 is characterized in that, wherein desires picture displayed and needs the different duration of charging corresponding to this with the plural picture element of those M bar sweep trace correspondences in one-period.
5. scanning of a display line signal control method as claimed in claim 4 is characterized in that, wherein has a minimum duration of charging corresponding to this desire picture displayed in the middle of the plural picture element with those M bar sweep trace correspondences in one-period.
6. scanning of a display line signal control method as claimed in claim 5 is characterized in that, wherein should duration of charging Tc more than or equal to this minimum duration of charging.
7. scanning of a display line signal control method as claimed in claim 1 is characterized in that, should duration of charging Tc be shown in following formula wherein:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101431468A CN102163405B (en) | 2011-05-31 | 2011-05-31 | Method for controlling signal of scanning line of display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101431468A CN102163405B (en) | 2011-05-31 | 2011-05-31 | Method for controlling signal of scanning line of display |
Publications (2)
| Publication Number | Publication Date |
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| CN102163405A true CN102163405A (en) | 2011-08-24 |
| CN102163405B CN102163405B (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101431468A Expired - Fee Related CN102163405B (en) | 2011-05-31 | 2011-05-31 | Method for controlling signal of scanning line of display |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107221284A (en) * | 2017-07-27 | 2017-09-29 | 深圳市华星光电技术有限公司 | A kind of display panel and its drive control method |
| CN107507586A (en) * | 2017-08-25 | 2017-12-22 | 惠科股份有限公司 | Driving device and display panel |
| CN109637407A (en) * | 2019-01-09 | 2019-04-16 | 惠科股份有限公司 | Method and device for repairing display panel and driving method of display panel |
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| CN102005174A (en) * | 2010-12-31 | 2011-04-06 | 福建华映显示科技有限公司 | Method for reducing image ghosting |
| CN102074181A (en) * | 2010-09-07 | 2011-05-25 | 福建华映显示科技有限公司 | Time sequence control method of display panel |
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| JP2001356738A (en) * | 2000-06-12 | 2001-12-26 | Matsushita Electric Ind Co Ltd | Active matrix type liquid crystal display device and drive method therefor |
| US20080122876A1 (en) * | 2006-11-27 | 2008-05-29 | Innocom Technology (Shenzhen) Co., Ltd. | Liquid crystal display having gate delay compensator |
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| CN107221284A (en) * | 2017-07-27 | 2017-09-29 | 深圳市华星光电技术有限公司 | A kind of display panel and its drive control method |
| CN107221284B (en) * | 2017-07-27 | 2020-12-04 | 深圳市华星光电技术有限公司 | Display panel and driving control method thereof |
| CN107507586A (en) * | 2017-08-25 | 2017-12-22 | 惠科股份有限公司 | Driving device and display panel |
| CN109637407A (en) * | 2019-01-09 | 2019-04-16 | 惠科股份有限公司 | Method and device for repairing display panel and driving method of display panel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102163405B (en) | 2013-04-17 |
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Granted publication date: 20130417 Termination date: 20190531 |
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