CN102163405B - 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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- CN102163405B CN102163405B CN2011101431468A CN201110143146A CN102163405B CN 102163405 B CN102163405 B CN 102163405B CN 2011101431468 A CN2011101431468 A CN 2011101431468A CN 201110143146 A CN201110143146 A CN 201110143146A CN 102163405 B CN102163405 B CN 102163405B
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- time point
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- sweep trace
- picture element
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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, so that volume is thin, lightweight and have a liquid crystal display (Liquid Crystal Display of low electromagnetic; LCD), become gradually the display main product.
Liquid crystal panel is comprised 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 according to this Show Color by other mode.
A kind of traditional liquid crystal display is to utilize colored filter and the three primary colors composition that shows simultaneously a picture element, thereby demonstrates color.A picture element of this kind colored filter liquid crystal display is by three combination of pixels, corresponds to respectively red, green and blue color filter.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 liquid crystal display 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 simultaneously three sweep traces, and the mode of closing simultaneously three sweep traces is 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 the first picture element
11) when closing, the sweep trace (G of the second picture element
12) also close, so the first picture element can occur to the coupling effect of the second picture element, make the second picture element produce coupling capacitance.Sweep trace (G when the second picture element
12) when closing, the sweep trace (G of the 3rd picture element
13) also close, so the 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 the first picture element is without other picture element, therefore the second picture element and the 3rd picture element all have coupling capacitance C1 shown in 9 figure, and the first picture element there is no coupling capacitance C1 generation at the opposite side in contrast to the 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 4th picture element can occur to the coupling effect of the 5th picture element, 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 different, with coupling capacitance also not identical, cause the uneven phenomenon of pixel voltages, and then impel display frame to produce the abnormal case of colored gridiron pattern phenomenon.
Hereat, still need now a technical scheme that can solve above-mentioned pixel voltages inequality phenomenon.
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.The method comprises the picture that shows corresponding to wish, 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 picture element corresponding to those sweep traces 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 rear accompanying drawing formula and claim will make the reader have a clear understanding of 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 according to another embodiment of the present invention scanning of a display line signal control method.
Fig. 6 is the process flow diagram that shows according to another embodiment of the present invention scanning of a display line signal control method.
Fig. 7 is the synoptic diagram that the voltage that show to use the display of traditional signal control method to produce distributes.
Fig. 8 is the synoptic diagram that shows the voltage distribution that this scanning of a display of use line signal control method produces 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 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 unlatching and the shut-in time of the sweep trace of each picture element that staggers, the unequal phenomenon of pixel voltages that the sweep trace of opening simultaneously and closing three picture elements in traditional sequential control method is caused improves.
Wherein, if the size of each picture element, characteristic, material are all identical, then (Tc) is also identical the duration of charging of each picture element.Otherwise if the size of each picture element, characteristic, material are all different, 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 by this occuring the problem of liquid crystal understeer.The minimum duration of charging is the factors such as the size that depends on picture element, material.
The present invention can open respectively and close the sweep trace more than two within 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 better specific embodiment, must open respectively and close the sweep trace of three picture elements in each time scan period.As shown in Figure 1, the sequencing of sweep time through arranging according to sweep trace of the picture of wish demonstration is divided into N scan period.Central N is the positive integer more than or equal to 1.The initial time point of the first scan period is T
1(hereinafter referred to as the first initial time point), the initial time point of the second scan period is T
2(hereinafter referred to as the second initial time point), by that analogy and the initial time point of N scan period is T
N(hereinafter referred to as the initial time point of N).Should attention person be, present embodiment be only in order to illustrating 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 larger, then time delay, (△ t) was larger, and time delay (△ t), larger then coupling capacitance eradicating efficacy was better.
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 the 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 above-described embodiment, open the sweep trace of three picture elements in the first time scan period, if total sweep trace quantity is 900, the picture frame renewal rate is 60 hertz (Hz), and each picture element all can comprise the colour field of red (R), green (G), blue (B).Be 1/ ((900/3) * 3 * 60) second according to the duration of charging (Tc) among this embodiment of above-mentioned formula (1) then, namely 1.852 * 10
-5Second.
In an embodiment, T
2Deduct T
1Value be the value that adds 2 △ t more than or equal to Tc.
Such as Fig. 1 and shown in Figure 3, in step 207, be T in the second initial time point
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 the 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 above-described embodiment, 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.
Such as Fig. 4 and shown in Figure 5, in another embodiment, must open respectively and close the sweep trace of M picture element in each cycle length.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 the picture of wish demonstration is divided into N scan period.Central N is the positive integer more than or equal to 1.The initial time point of the first scan period is T
1(hereinafter referred to as the first initial time point), the initial time point of the second scan period is T
2(hereinafter referred to as the second initial time point), by that analogy and the initial time point of N scan period is T
N(hereinafter referred to as the initial time point of N).Should attention person be, present embodiment be only in order to illustrating 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 larger, then time delay, (△ t) was larger, and time delay (△ t), larger then coupling capacitance eradicating efficacy was better.
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).
Sequentially repeat afterwards above-mentioned steps 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 the 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).
Sequentially repeat afterwards above-mentioned steps 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.
Such 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).
Sequentially repeat afterwards above-mentioned steps 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 the 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).
Sequentially repeat afterwards above-mentioned steps 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 the first picture element and shut-in time are all postponed and are mutually staggered.
So when the sweep trace of the first picture element is closed, the sweep trace of the second picture element still is opening, and the sweep trace of the first picture element can significantly reduce because the sweep trace of the second picture element is in charge condition when the sweep trace of the first picture element is closed the coupling effect of the sweep trace of the second picture element by this.
In like manner, when the sweep trace of the 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, and then avoid display for example color sequential display device colored gridiron pattern phenomenon appears.
For example, take the resolution of 1600*900 as 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 the first picture element and shut-in time add respectively △ t time delay (2 μ s) as mentioned above, can produce as shown in Figure 8 as average voltage distribute so that colored gridiron pattern phenomenon is significantly improved.
Above-mentioned narration is to be preferred embodiment of the present invention.The skill person in this field is deserved to be the present invention to be described but not the patent right scope advocated in order to limit the present invention 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, within not breaking away from this patent spirit or scope, the change of doing or retouching all belong to the equivalence of finishing under the disclosed spirit and change or design, and should be included in the following claim.
Claims (6)
1. a scanning of a display line signal control method is characterized in that, comprises the following step:
Corresponding to the picture that a wish shows, 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 one by one the M bar sweep trace of this N in the scan period according to the sequencing that those sweep traces are arranged, so that picture element corresponding to those sweep traces 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 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; , more comprise the following step:
In this T of N in the scan period " (P) time point; close one by one this N this M bar sweep trace in the scan period 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.
2. scanning of a display line signal control method as claimed in claim 1 is characterized in that, wherein each corresponding at least one picture element of this M bar sweep trace.
3. scanning of a display line signal control method as claimed in claim 2 is characterized in that, the picture that the plural picture element that wherein those M bar sweep traces in the same period are corresponding shows corresponding to this wish and need the different duration of charging.
4. scanning of a display line signal control method as claimed in claim 3 is characterized in that, the picture that shows corresponding to this wish in the middle of the plural picture element that wherein those M bar sweep traces in the same period are corresponding has a minimum duration of charging.
5. scanning of a display line signal control method as claimed in claim 4 is characterized in that, wherein should duration of charging Tc more than or equal to this minimum duration of charging.
6. 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 |
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| CN102163405A CN102163405A (en) | 2011-08-24 |
| CN102163405B true CN102163405B (en) | 2013-04-17 |
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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN107507586B (en) * | 2017-08-25 | 2019-11-29 | 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001356738A (en) * | 2000-06-12 | 2001-12-26 | Matsushita Electric Ind Co Ltd | Active matrix type liquid crystal display device and drive method therefor |
| CN101256758A (en) * | 2008-04-11 | 2008-09-03 | 友达光电股份有限公司 | Drive method of liquid crystal display panel and LCD thereof |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200823840A (en) * | 2006-11-27 | 2008-06-01 | Innolux Display Corp | Liquid crystal display, driving circuit and driving method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001356738A (en) * | 2000-06-12 | 2001-12-26 | Matsushita Electric Ind Co Ltd | Active matrix type liquid crystal display device and drive method therefor |
| CN101256758A (en) * | 2008-04-11 | 2008-09-03 | 友达光电股份有限公司 | Drive method of liquid crystal display panel and LCD thereof |
| 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 |
| 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 |
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Effective date of registration: 20170808 Address after: 1#, building third, fourth, 6 West Road, Mawei West Road, Mawei District, Fujian, Fuzhou Co-patentee after: Chunghwa Picture Tubes Ltd. Patentee after: CPT DISPLAY TECHNOLOGY (SHENZHEN)CO., LTD. Address before: 350015, Xingye Road, Mawei Science Park, Fujian, Fuzhou 1, China Co-patentee before: Chunghwa Picture Tubes Ltd. Patentee before: Fujian Huaying Display Technology Co., Ltd. |
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