CN101833920A - Drive circuit and grey insertion method for liquid crystal display - Google Patents
Drive circuit and grey insertion method for liquid crystal display Download PDFInfo
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- CN101833920A CN101833920A CN200910047558A CN200910047558A CN101833920A CN 101833920 A CN101833920 A CN 101833920A CN 200910047558 A CN200910047558 A CN 200910047558A CN 200910047558 A CN200910047558 A CN 200910047558A CN 101833920 A CN101833920 A CN 101833920A
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Abstract
The invention discloses a drive circuit and a grey insertion method for a liquid crystal display. The grey insertion method comprises the following steps of: analyzing that a current frame belongs to a dynamic frame or a static frame; prolonging the charging time of a grey insertion picture when the current frame belongs to the dynamic frame; and shortening the charging time of the grey insertion picture when the current frame belongs to the static frame. Therefore, the method can overcome the defect of fuzzy dynamic images of the liquid crystal display, and improve the quality of the displayed picture.
Description
Technical field
The invention relates to a kind of Plug Grey technology of LCD, and particularly adjust the Plug Grey picture duration of charging, with the Plug Grey technology of the Plug Grey degree of adjusting different brackets relevant for a kind of adaptability ground.
Background technology
(Liquid Crystal Display LCD) is the display mode that adopts freeze mode (Hold-type) to LCD, so LCD can produce the phenomenon of image fog when showing dynamic menu.Generally speaking, Plug Grey (Gray Insertion) technology is adopted in known meeting, to reduce the situation of dynamic fuzzy (Motion Blur).How following elder generation drives with regard to the LCD panel is done simple the description.
LCD panel driving signal mainly is divided into two partly, a data-signal that is provided for source electrode driver (Source Driver), and another is the sweep signal that gate drivers (Gate Driver) is provided.Data-signal mainly provides each pixel gray level pairing voltage signal.Sweep signal is in order to control the switching signal of each row pixel voltage input, and sweep signal is for lining by line scan.Usually, each pixel constitutes with a thin film transistor (TFT), and wherein thin film transistor (TFT) has grid, source electrode and drain electrode.In order to the control TFT conducting whether sweep signal.When the thin film transistor (TFT) conducting, data-signal can see through thin film transistor (TFT) pixel storage capacitor is charged.
Figure 1A is the synoptic diagram that known LCD panel shows the sweep signal of normal pictures.Please refer to Figure 1A, when sweep signal Gate 01～Gate N is high logic standard position, the thin film transistor (TFT) conducting, data-signal can see through thin film transistor (TFT) and charge to pixel storage capacitor, and then shows normal pictures.
Figure 1B is the synoptic diagram that known LCD panel shows the sweep signal of normal pictures and Plug Grey picture.After the Plug Grey function was opened, a picture (Frame) can be divided into two parts, and one is a normal pictures 101, and another is a Plug Grey picture 102.In Plug Grey picture 102, sweep signal Gate 01～Gate N fixed in the time of the accurate position of high logic.
What deserves to be mentioned is,, picture brightness is declined to a great extent though the Plug Grey technology can be improved the problem of the dynamic fuzzy of dynamic menu.LCD is showing tableaux, and when for example being photo or text screen, the situation that does not have dynamic fuzzy occurs.This moment, LCD was if use the Plug Grey technology, can cause picture contrast not good.
Therefore, LCD is when showing tableaux, and known meeting sees through manual type the Plug Grey function of LCD is closed.Yet when the Plug Grey function was opened or closed, the brightness difference in change out-phase of display frame caused the discomfort of human eye easily when big.
Summary of the invention
The invention provides a kind of grey insertion method of LCD, and can adjust the Plug Grey degree of different brackets, to promote image quality according to the variation of display frame.
From another viewpoint, the invention provides a kind of driving circuit, can analyze present frame, adjust the duration of charging of Plug Grey picture according to this, not only can improve the problem of dynamic fuzzy, more can improve the not good problem of brightness.
The present invention proposes a kind of grey insertion method of LCD, and it comprises that analyzing present frame belongs to dynamic frame or static frames.In addition, when present frame belongs to dynamic frame, prolong the duration of charging of Plug Grey picture.When present frame belongs to static frames, shorten the duration of charging of Plug Grey picture.
In one embodiment of this invention, the above-mentioned analysis present frame step that belongs to dynamic frame or static frames comprises the previous frame before the acquisition present frame.In addition, when present frame was different from above-mentioned previous frame, the judgement present frame was a dynamic frame.When present frame was same as above-mentioned previous frame, the judgement present frame was a static frames.
In one embodiment of this invention, the above-mentioned analysis present frame step that belongs to dynamic frame or static frames comprises the previous frame before the acquisition present frame.In addition, produce difference value according to present frame and above-mentioned previous frame.When difference value during greater than setting value, the judgement present frame is a dynamic frame.When difference value was not more than setting value, the judgement present frame was a static frames.In another embodiment, above-mentioned step according to present frame and previous frame generation difference value comprises whether the first area of differentiating present frame is same as the first area of previous frame.In addition, whether the second area of differentiation present frame is same as the second area of previous frame.Moreover, between present frame and previous frame, the quantity that each corresponding region differs from one another, decision difference value.
In one embodiment of this invention, the above-mentioned analysis present frame step that belongs to dynamic frame or static frames comprises the continuous change frequency of counting present frame and many previous frames.When continuous change frequency during greater than setting value, the judgement present frame is a dynamic frame.When continuous change frequency was not more than setting value, the judgement present frame was a static frames.
In one embodiment of this invention, it is above-mentioned when present frame belongs to dynamic frame, the step that prolongs the duration of charging of Plug Grey picture comprises that the duration of charging of the Plug Grey picture after prolonging surpasses the upper limit during duration of charging, with the duration of charging of upper limit duration of charging as the Plug Grey picture.In addition, the duration of charging of the Plug Grey picture after shortening is shorter than lower limit during the duration of charging, with the duration of charging of lower limit duration of charging as the Plug Grey picture.
The present invention proposes a kind of driving circuit.This driving circuit comprises controller and driver.Controller can be analyzed present frame and belong to dynamic frame or static frames.Driver couples controller.When present frame belongs to dynamic frame, can prolong the duration of charging of Plug Grey picture by driver.When present frame belongs to static frames, can shorten the duration of charging of Plug Grey picture by driver.
In one embodiment of this invention, driving circuit more comprises video decoder and frame buffer.Video decoder couples controller.Frame buffer couples video decoder and controller, can store present frame previous frame before.When present frame was different from previous frame, controller decidable present frame was a dynamic frame.When present frame was same as previous frame, controller decidable present frame was a static frames.
In one embodiment of this invention, driving circuit more comprises video decoder and frame buffer.Video decoder couples controller.Frame buffer couples video decoder and controller, the previous frame before the fechtable present frame.Controller can be analyzed the difference value between present frame and the previous frame.When difference value during greater than setting value, controller decidable present frame is a dynamic frame.When difference value was not more than setting value, controller decidable present frame was a static frames.In another embodiment, above-mentioned controller can comprise counter.Counter couples video decoder and frame buffer, between count enable present frame and the previous frame, and the quantity that whether identical each corresponding region is, and according to this as above-mentioned difference value.
In one embodiment of this invention, driving circuit more comprises video decoder, frame buffer and counter.Video decoder couples controller.Frame buffer couples video decoder and controller.Counter couples controller.When two continuous images differ from one another, the count value of summary counter, when two continuous images are mutually the same, the count value of counter reset.When count value during greater than setting value, controller decidable present frame is a dynamic frame, and when count value was not more than setting value, controller decidable present frame was a static frames.
The present invention is dynamic frame or static frames because of analyzing present frame.When present frame is dynamic frame, then prolong the Plug Grey picture duration of charging.When present frame is static frames, shorten the Plug Grey picture duration of charging.Therefore can improve the quality of display frame.
Description of drawings
Figure 1A is the synoptic diagram that known LCD panel shows the sweep signal of normal pictures;
Figure 1B is the synoptic diagram that known LCD panel shows the sweep signal of normal pictures and Plug Grey picture;
Fig. 1 C is a kind of synoptic diagram of adjusting the Plug Grey picture duration of charging with picture according to one embodiment of the invention;
Fig. 2 is the calcspar according to the driving circuit of one embodiment of the invention;
Fig. 3 is the process flow diagram according to the grey insertion method of a kind of LCD of one embodiment of the invention;
Fig. 4 is the synoptic diagram of a kind of previous frame and present frame;
Fig. 5 is the process flow diagram of a kind of embodiment of step S301;
Fig. 6 is the process flow diagram of the another kind of embodiment of step S301.
For above-mentioned feature and advantage of the present invention can be become apparent, several embodiment cited below particularly, and cooperate appended graphicly, be described in detail below.
Embodiment
Known Plug Grey technology though can improve the situation of the dynamic fuzzy of dynamic menu, can make the brightness of dynamic menu and tableaux decline to a great extent.In addition, when known Plug Grey function was opened or closed, display frame brightness difference in change out-phase caused the discomfort of human eye easily when big.
In view of this, embodiments of the invention provide the grey insertion method of a kind of LCD.The state that the method can be analyzed present frame is dynamic or static frames.After analysis is finished, if present frame is dynamic frame, duration of charging that can progressive prolongation Plug Grey picture, and then improve the situation of dynamic fuzzy.Otherwise, if present frame is static frames, duration of charging that can progressive shortening Plug Grey picture, and then improve the not good situation of display frame brightness.In addition, the ratio degree in above-mentioned gradual control Plug Grey picture duration of charging also can be avoided starting suddenly grey insertion method and cause the brightness variation difference of display frame excessive, and then causes the discomfort of human eye.Elaborate embodiments of the invention below with reference to the accompanying drawings, accompanying drawing is for example understood example embodiment of the present invention, wherein same or similar assembly or the step of same numeral indication.
Fig. 1 C is a kind of synoptic diagram of adjusting the Plug Grey picture duration of charging with picture according to one embodiment of the invention.Please refer to Fig. 1 C, the grey insertion method of present embodiment can be analyzed present frame and belong to dynamic frame or static frames.When present frame belonged to dynamic frame, in duration of charging that can gradual prolongation Plug Grey picture 103, just sweep signal Gate 01～Gate N was in the time of the accurate position of high logic.So can improve the problem of dynamic fuzzy.
When present frame belongs to static frames, duration of charging that can gradual shortening Plug Grey picture.That is to say, the time modification of sweep signal Gate 01～Gate N in the accurate position of high logic can be become short state, make the duration of charging deficiency of the Plug Grey signal of source electrode to picture, picture can not present dark state, therefore can keep the brightness of picture.
Fig. 2 is the block diagram according to the driving circuit of one embodiment of the invention.Please refer to Fig. 2, in the present embodiment, driving circuit 10 can comprise video decoder 20, frame buffer (Frame Buffer) 30, controller 40 and driver 50.In addition, controller 40 can comprise counter 41.In the present embodiment, controller 40 couples driver 50.Video decoder 20 couples controller 40.Frame buffer 30 couples video decoder 20 and controller 40.Counter 41 couples video decoder 20 and frame buffer 30.
Video decoder 20 can be used to decipher video signal data, and provides decoded frame to controller 40 and frame buffer 30 according to this.Frame buffer 30 can be used to store frame, and provides previous frame to controller 40.The previous frame that present frame that controller 40 can be provided according to video decoder 20 and frame buffer 30 are provided is analyzed present frame and is belonged to dynamic frame or static frames, and then produces and adjust signal.Then, 50 of drivers can be adjusted the duration of charging of Plug Grey picture according to adjusting signal.
In more detail, in first image duration, video decoder 20 can provide first frame to controller 40 and frame buffer 30.Frame buffer 30 can store first frame.Then, in second image duration, video decoder 20 can provide second frame to controller 40 and frame buffer 30.Frame buffer 30 exportable first frames are given controller 40 and are stored second frame.Second frame that first frame that controller 40 can be provided according to frame buffer 30 and video decoder 20 are provided is analyzed second frame and whether is belonged to dynamic frame, and then produces and adjust signal.Thus, 50 of drivers can be according to adjusting the Plug Grey picture duration of charging that signal was adjusted at for second image duration.Below cooperate process flow diagram to do detailed explanation.
Fig. 3 is the process flow diagram according to the grey insertion method of a kind of LCD of one embodiment of the invention.Fig. 4 is the synoptic diagram of a kind of previous frame and present frame.Please merge 2～Fig. 4 with reference to figure, suppose that previous frame and present frame are successive frame, wherein previous frame and present frame all comprise a mountain 410 and YIDUOYUN 420, and previous frame is that with the difference of present frame the position of cloud 420 is different.In addition, suppose that frame buffer 30 has stored previous frame.When video decoder 20 provided present frame to frame buffer 30 and controller 40, frame buffer 30 can store present frame and provide previous frame to controller 40.On the other hand, whether 40 of controllers can belong to dynamic frame (step S301), the execution in step S302 if dynamic frame then continues according to present frame and previous frame analysis present frame; Otherwise execution in step S303 then.Below provide a kind of embodiment of step S301 to consider and examine for haveing the knack of this area person.
Fig. 5 is the process flow diagram of a kind of embodiment of step S301.Please merge with reference to Fig. 2～Fig. 5, step S301 for example can comprise step S501～S504 in the present embodiment.At first can produce difference value according to present frame and previous frame by step S501.Whether for instance, can compare present frame respectively mutually the same with each corresponding block of previous frame.Then, the quantity that differs from one another according to each corresponding block again produces difference value.
More particularly, in the present embodiment, counter 41 its count value of can resetting earlier, the count initialized value is 0.Then, whether the block 1 that controller 40 can compare previous frame earlier is identical with the block 1 of present frame, is failure to actuate as if 41 of same count devices, if 41 accumulated counts values of counter inequality.In the present embodiment, the block 1 of frame is inequality with the block 1 of present frame, so count value becomes 1 by 0.By that analogy, relatively whether the block 2～9 of previous frame is identical with the block 2～9 of present frame respectively again for controller 40.In the present embodiment, the block 2,4,5 of frame and the block 2,4,5 of present frame are inequality, so after the block 2～9 of the block 2～9 of the relatively intacter previous frame of controller 40 and present frame, count value can become 4.Note that in the present embodiment that at this count value can be directly as above-mentioned difference value, but the present invention is not as limit.Count value also can be indirectly as above-mentioned difference value in other embodiments.
But whether subsequent steps S502 after obtaining difference value, controller 40 can differentiate difference value greater than setting value, if greater than judging that then present frame is dynamic frame (step S503), otherwise judge that then present frame is not dynamic frame, that is static frames (step S504).In the present embodiment, setting value is that example describes with 4, so difference value is not more than setting value, and controller 40 judges that present frames are static frames, and produces the adjustment signal in the duration of charging that can shorten the Plug Grey picture according to this and give driver 50.
Note that at this present embodiment utilizes step S501～S504 to come the benefit of implementation step S301 to be, can avoid frame to be judged as dynamic frame because of changing slightly.
Because present frame is judged as static frames at step S301, so subsequent steps S303, shorten the duration of charging of Plug Grey picture.Please merge with reference to Fig. 1 C, Fig. 2～Fig. 5, at step S303, driver 50 can shorten the duration of charging of Plug Grey signal among Fig. 1 C according to the adjustment signal that controller 40 is provided.Thus, the duration of charging of Plug Grey picture can be shortened gradually, therefore the not good problem of brightness that LCD shows static frames can be improved.It is excessive also can to avoid duration of charging of Plug Grey picture to change the change of ambassador's picture brightness in addition, and then causes the human eye discomfort.
The duration of charging (during b) that note that the Plug Grey picture after shortening in addition is shorter than lower limit during the duration of charging, then with the duration of charging of lower limit duration of charging as the Plug Grey picture.Have the knack of art technology person and can set up the lower limit duration of charging on their own according to its demand.The benefit of this practice is to make LCD can continue to show the Plug Grey picture.
In like manner can analogize, if present frame is judged as dynamic frame at step S301, subsequent steps S302 then prolongs duration of charging of Plug Grey picture.More particularly, at step S302, driver 50 can prolong the duration of charging of Plug Grey signal among Fig. 1 C according to the adjustment signal that controller 40 is provided.Thus, the duration of charging of Plug Grey picture can be prolonged gradually, therefore the problem that LCD shows the dynamic fuzzy of dynamic frame can be improved.Also can avoid the duration of charging change of Plug Grey picture excessive in addition, make the picture brightness change excessive and then cause the human eye discomfort.
The duration of charging (during b) that note that the Plug Grey picture after prolonging in addition surpasses the upper limit during duration of charging, then with the duration of charging of upper limit duration of charging as the Plug Grey picture.Have the knack of art technology person and can set up the upper limit duration of charging on their own according to its demand.The benefit of this practice is to make LCD can continue to show normal pictures.
Needing especially one, what carry is after prolonging or shortening the duration of charging of Plug Grey picture, to have the knack of art technology person and can adopt various picture scan mode according to its demand, and then present the Plug Grey picture.For instance, driving circuit 10 can cooperate (Raster Scanning) mode of lining by line scan to show the Plug Grey picture in the present embodiment.But in other embodiments, also can adopt staggered rows scanning (Interlace Scanning) mode or other scan mode to show the Plug Grey picture, the present invention is not as limit.
Referring again to Fig. 5, in the above-described embodiments, step S501 is whether the comparison present frame is mutually the same with 9 corresponding blocks of previous frame, and then produces difference value, but the present invention is not as limit.In other embodiments, have the knack of art technology person and also can adopt the corresponding block of other quantity to replace above-mentioned 9 corresponding blocks, and then produce difference value according to its demand.So also can reach the effect similar with the foregoing description.Along with the increase of corresponding number of blocks, the degree of accuracy of differentiating present frame and whether the be dynamic frame height of also can healing.
Though LCD and grey insertion method thereof have been depicted a possible kenel in the foregoing description, usually know that the knowledgeable should know but have in the affiliated technical field, each manufacturer is all different for the design of LCD and grey insertion method thereof, and therefore application of the present invention is when being not restricted to the possible kenel of this kind.In other words, be dynamic frame or static frames so long as analyze present frame, and then decision prolong or the duration of charging of shortening Plug Grey picture has been to have met spiritual place of the present invention just.Below lift several embodiments again and know that usually the knowledgeable can further understand spirit of the present invention, and implement the present invention so that this area has.
In addition, in the above-described embodiments, the calcspar of the LCD that Fig. 2 disclosed only is a kind of selection embodiment, and the present invention is not as limit.In other embodiments, have the knack of the framework that art technology person also can change driving circuit 10 according to its demand.For instance, though the embodiment of Fig. 2 counter 41 is disposed in the controller 40.But in other embodiments, counter 41 is also configurable outside controller 40.
In addition, in the foregoing description, the step S501 that Fig. 5 disclosed～S504 only is a kind of selection embodiment of step S301, and the present invention is not as limit.In other embodiments, whether haveing the knack of art technology person, also can to adopt alternate manner to differentiate present frame be dynamic frame (step S301).Whether for instance, it is identical with previous frame directly to compare present frame, can assert then that as if identical present frame is a static frames; Otherwise, can assert then that as if inequality present frame is a dynamic frame.The benefit of this practice is that its computation complexity is low, and can save the counter 41 of Fig. 2.
Again for example, Fig. 6 is the process flow diagram of the another kind of embodiment of step S301.Please merge with reference to Fig. 2 and Fig. 6, step S301 for example can comprise step S601～S604 in the present embodiment.The original state of the count value of present embodiment hypothesis counter 41 is 0.At first can be by step S601, the continuous change frequency of counting present frame and many previous frames.In more detail, in first image duration, whether controller 40 can compare previous frame identical with present frame, and if the count value if same count device 41 can be reset is 41 accumulated counts values of counter inequality.In the present embodiment, can utilize the count value of counter 41 as above-mentioned continuous change frequency.Identical at this hypothesis previous frame with present frame, so count value becomes 1 by 0.
Then but whether subsequent steps S602 differentiates continuous change frequency greater than setting value, if be dynamic frame (step S603) greater than decidable present frame then; Otherwise, if be static frames (step S604) less than decidable present frame then.Setting value for example can be 3 in the present embodiment.Because count value is 1 to be not more than setting value 3, therefore present frame can be judged to be static frames (step S604) in first image duration.
In like manner, in second image duration, can judge whether the present frame of second image duration is dynamic frame according to above-mentioned steps S601～S604 equally.By that analogy, whether each image duration to differentiate present frame be the embodiment of dynamic frame after should knowing by inference to have the knack of art technology person, do not repeat them here.
Note that at this present embodiment utilizes step S601～S604 to come the benefit of implementation step S301 to be, can avoid frame not change between short-term and be judged as static frames.In addition, though the frame buffer 30 of present embodiment only can store a frame, present embodiment is used the information that counter 41 can obtain many previous pictures indirectly.Therefore, frame buffer 30 can be saved the storage area effectively, and does not need to store many previous frame.
Moreover in the present embodiment, though the setting value of step S602 is that example describes with 3, the present invention is not as limit.In other embodiments, have the knack of the size that art technology person can decide setting value according to its demand in its sole discretion.What deserves to be mentioned is that along with setting value is bigger, present frame then is judged as tableaux more easily; Otherwise along with setting value is littler, present frame then is judged as dynamic menu more easily.
In sum, it is dynamic frame or static frames that the present invention analyzes present frame by controller, to prolong or to shorten the Plug Grey picture duration of charging.Therefore duration of charging that can accommodation Plug Grey picture, can not only improve the dynamic fuzzy problem of dynamic frame, also can improve static frames and cause the serious distortion of brightness because of the Plug Grey technology.In addition, all embodiment of the present invention also have following effect:
1. shorten the duration of charging of Plug Grey picture, can improve the not good problem of brightness that LCD shows static frames.
2. prolong the duration of charging of Plug Grey picture, can improve the problem that LCD shows the dynamic fuzzy of dynamic frame.
3. duration of charging of progressive adjustments Plug Grey picture, can avoid the display frame luminance difference excessive and cause the discomfort of human eye.
4. utilize step S501～S504 to come implementation step S301, can avoid frame to be judged as dynamic frame because of changing slightly.
5. adjust the quantity of corresponding block among the step S501, can change and differentiate whether present frame is the degree of accuracy of dynamic frame.
6. directly relatively whether present frame is identical with previous frame, and then differentiates whether present frame is dynamic frame, can effectively reduce computation complexity, and can save the hardware cost of counter.
7. utilize step S601～S604 to come implementation step S301, can avoid frame not change between short-term and be judged as static frames.
8. be used frame buffer and counter and not only can obtain the information of many previous pictures indirectly, and can save the frame buffer storage area effectively.
9. among the step S602, can adjust present frame by the change setting value and whether be judged as dynamic menu easily.
Though the present invention discloses as above with several embodiment; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the claim person of defining.
Claims (11)
1. the grey insertion method of a LCD is characterized in that, comprising:
Analyze a present frame and belong to dynamic frame or static frames;
When this present frame belongs to dynamic frame, prolong the duration of charging of Plug Grey picture; And
When this present frame belongs to static frames, shorten the duration of charging of Plug Grey picture.
2. grey insertion method as claimed in claim 1 is characterized in that, wherein analyzes the step that this present frame belongs to dynamic frame or static frames, comprising:
Capture this present frame previous frame before;
When this present frame is different from this previous frame, judge that this present frame is a dynamic frame; And
When this present frame is same as this previous frame, judge that this present frame is a static frames.
3. grey insertion method as claimed in claim 1 is characterized in that, wherein analyzes the step that this present frame belongs to dynamic frame or static frames, comprising:
Capture this present frame previous frame before;
Produce a difference value according to this present frame and this previous frame;
When this difference value during, judge that this present frame is a dynamic frame greater than a setting value; And
When this difference value is not more than this setting value, judge that this present frame is a static frames.
4. grey insertion method as claimed in claim 3 is characterized in that, wherein produces the step of this difference value according to this present frame and this previous frame, comprising:
Whether the first area of differentiating this present frame is same as the first area of this previous frame;
Whether the second area of differentiating this present frame is same as the second area of this previous frame; And
Between this present frame and this previous frame, the quantity that each corresponding region differs from one another determines this difference value.
5. grey insertion method as claimed in claim 1 is characterized in that, wherein analyzes the step that this present frame belongs to dynamic frame or static frames, comprising:
Count a continuous change frequency of this present frame and many previous frames;
When this continuous change frequency during, judge that this present frame is a dynamic frame greater than a setting value; And
When this continuous change frequency is not more than this setting value, judge that this present frame is a static frames.
6. grey insertion method as claimed in claim 1 is characterized in that,
When this present frame belongs to dynamic frame, prolong the step in the duration of charging of Plug Grey picture, comprising:
The duration of charging of the Plug Grey picture after prolonging surpasses a upper limit during duration of charging, with the duration of charging of this upper limit duration of charging as the Plug Grey picture.
When this present frame belongs to static frames, shorten the step in the duration of charging of Plug Grey picture, comprising:
The duration of charging of the Plug Grey picture after shortening is shorter than a lower limit during duration of charging, with the duration of charging of this lower limit duration of charging as the Plug Grey picture.
7. a driving circuit is characterized in that, comprising:
One controller is analyzed a present frame and is belonged to dynamic frame or static frames; And
One driver couples this controller,
When this present frame belongs to dynamic frame, in the duration of charging by this driver prolongation Plug Grey picture, when this present frame belongs to static frames, shorten the duration of charging of Plug Grey picture by this driver.
8. driving circuit as claimed in claim 7 is characterized in that, also comprises:
One video decoder couples this controller; And
One frame buffer couples this video decoder and this controller, stores this present frame previous frame before;
When this present frame was different from this previous frame, this controller judged that this present frame is a dynamic frame; And
When this present frame was same as this previous frame, this controller judged that this present frame is a static frames.
9. driving circuit as claimed in claim 7 is characterized in that, also comprises:
One video decoder couples this controller; And
One frame buffer couples this video decoder and this controller, captures this present frame previous frame before;
Wherein, this controller is analyzed the difference value between this present picture frame and this previous picture frame, and when this difference value during greater than a setting value, this controller judges that this present frame is a dynamic frame, when this difference value was not more than this setting value, this controller judged that this present frame is a static frames.
10. driving circuit as claimed in claim 9 is characterized in that, this controller wherein comprises:
One counter couples this video decoder and this frame buffer, counts between this present frame and this previous frame, and the quantity that whether identical each corresponding region is is as this difference value.
11. driving circuit as claimed in claim 7 is characterized in that, also comprises:
One video decoder couples this controller;
One frame buffer couples this video decoder and this controller; And
One counter couples this controller,
Wherein, when two continuous images differ from one another, a count value of this counter adds up, when two continuous images are mutually the same, this count value of this counter of resetting, when this count value during greater than a setting value, this controller judges that this present frame is a dynamic frame, when this count value was not more than this setting value, this controller judged that this present frame is a static frames.
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| CN111816133A (en) * | 2020-07-07 | 2020-10-23 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display and leakage compensation method thereof |
| CN115312006A (en) * | 2022-07-12 | 2022-11-08 | 广州文石信息科技有限公司 | Electronic ink screen driving method, ink screen equipment and storage medium |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI433117B (en) * | 2006-03-22 | 2014-04-01 | Fujifilm Corp | Liquid crystal display and method of displaying thereof |
| KR101345675B1 (en) * | 2007-02-15 | 2013-12-30 | 삼성디스플레이 주식회사 | Liquid crystal display |
| CN101281728A (en) * | 2007-04-03 | 2008-10-08 | 中华映管股份有限公司 | Method and apparatus for switching adaptability gamma conversion voltage |
| CN101281741B (en) * | 2007-04-03 | 2010-06-16 | 中华映管股份有限公司 | Apparatus and method for displaying dynamic menu |
| CN101286303B (en) * | 2007-04-13 | 2012-04-11 | 奇美电子股份有限公司 | LCD device and its image display process |
-
2009
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017067020A1 (en) * | 2015-10-23 | 2017-04-27 | 深圳市华星光电技术有限公司 | Display device and method for driving same |
| CN109979392A (en) * | 2019-04-30 | 2019-07-05 | 京东方科技集团股份有限公司 | Sequential control method, timing control mould group and display device |
| CN111816133A (en) * | 2020-07-07 | 2020-10-23 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display and leakage compensation method thereof |
| US11961449B2 (en) | 2020-07-07 | 2024-04-16 | Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd. | Liquid crystal device and method for compensating current leakage of LCD |
| CN115312006A (en) * | 2022-07-12 | 2022-11-08 | 广州文石信息科技有限公司 | Electronic ink screen driving method, ink screen equipment and storage medium |
| CN115312006B (en) * | 2022-07-12 | 2024-02-20 | 广州文石信息科技有限公司 | Electronic ink screen driving method, ink screen device and storage medium |
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