CN102708835A - Drive method of liquid crystal display screen and liquid crystal display - Google Patents
Drive method of liquid crystal display screen and liquid crystal display Download PDFInfo
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- CN102708835A CN102708835A CN2012102285016A CN201210228501A CN102708835A CN 102708835 A CN102708835 A CN 102708835A CN 2012102285016 A CN2012102285016 A CN 2012102285016A CN 201210228501 A CN201210228501 A CN 201210228501A CN 102708835 A CN102708835 A CN 102708835A
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Abstract
The invention discloses a drive method of a liquid crystal display screen. The method comprises the following steps: dividing each image of each frame of the image into at least three image areas according to the scanning order; scanning on the liquid crystal display screen according to the image areas; setting an area blank time domain after scanning operation in each image area; and putting the high gray-scale voltage or the low gray-scale voltage in other one or more images areas in the area blank time domain of the current displayed image area. The invention further discloses a liquid crystal display, which at least comprises the liquid crystal display screen and a screen control unit, wherein the screen control unit is used for dividing each image of each frame of the image into at least three image areas according to the scanning order, transmitting the row scanning commands to the grid line of the liquid crystal display screen according to the image areas, setting the area blank time domain after scanning operation in each image area, transmitting the commands for starting-up the one or more image areas to the grid line of the liquid crystal display screen when the liquid crystal display screen is located in the area blank time domain of the current displayed image, and putting the gray-scale voltage to the source line of the liquid crystal display screen.
Description
Technical field
The present invention relates to a kind of liquid crystal display driving method and LCD.
Background technology
The 3D effect of liquid crystal display is to realize through the switching that shows two width of cloth pictures different and 3D glasses right and left eyes, in the time of in can seeing the eye image or the right eye of 3D glasses in the left eye of 3D glasses, can seeing left-eye image, is and crosstalks.
The technology that existing solution is crosstalked is mainly two kinds: 240Hz screen black plug method commonly used; Can't use the 120Hz screen of black plug method to adopt scanning method backlight usually, promptly on liquid crystal display, open (other parts are backlight not to work) backlight of corresponding region in the retention time of display image (zone).
But slower in view of the reversal rate of liquid crystal molecule, said method still can cause and crosstalk.In order to accelerate the speed that liquid crystal molecule arrives steady state (SS), existing method is to hang down grey menu in tradition by inserting in the field blank time domain of frame scan mode, and is as shown in Figure 1.
In realizing process of the present invention, the inventor finds that this method can cause the liquid crystal molecule rotational time obviously not enough (just having begun rotation just has to stop because inserting low GTG) of last several row of each frame, extremely influences image quality.
Summary of the invention
In order to overcome above-mentioned defective, the present invention provides a kind of liquid crystal display driving method that quickens the liquid crystal molecule rotation.
For achieving the above object; On the one hand; The present invention provides a kind of liquid crystal display driving method; Said method by picture district scans on liquid crystal display for each picture to every two field picture is divided into three picture districts by the line scanning order at least, and district's blank time domain is set after each picture domain scanning finishes; One or more pictures district to other in district's blank time domain in current display frame district imports a certain fixed gray level voltage.
On the other hand; The present invention provides a kind of LCD; At least comprise liquid crystal display and screen control module; Said screen control module is used for each picture of every two field picture is divided at least three picture districts by the line scanning order, presses the picture district and sends the line scanning instruction to the gate line of liquid crystal display, and district's blank time domain is set after each picture domain scanning is accomplished; In district's blank time domain in current display frame district, said screen control module sends the instruction of opening one or more other picture districts to the gate line of liquid crystal display, imports a certain fixed gray level voltage to the source electrode line of liquid crystal display.
Liquid crystal display driving method of the present invention is that each picture to every two field picture is divided into the picture district by the line scanning order and the split screen district is scanned; To other low gray scale voltage of one or more pictures district input or high gray voltage, make liquid crystal molecule rotate to one in advance and help the position that the next frame picture shows in district's blank time domain after each picture domain scanning finishes.Improve the rotational speed of liquid crystal molecule, improved the display quality of liquid crystal display.
The screen control module of LCD of the present invention has been realized above-mentioned liquid crystal display driving method; The scanning that makes every two field picture all is to realize through separately scanning of some pictures district; Import gray scale voltage to other district in the time of between the picture domain scanning; Make liquid crystal molecule rotate in advance, thereby improved the speed that liquid crystal molecule reaches next frame position that picture requires, improved the display quality of liquid crystal display.
Description of drawings
Fig. 1 is the sequential chart synoptic diagram of available liquid crystal screen driving method.
Fig. 2 is the schematic flow sheet of liquid crystal display driving method of the present invention.
Fig. 3 is the sequential chart synoptic diagram of liquid crystal display driving method of the present invention.
Embodiment
Below in conjunction with Figure of description and embodiment the present invention is done detailed description.
As shown in Figure 2, liquid crystal display driving method of the present invention by picture district scans on liquid crystal display for each picture to every two field picture is divided into three picture districts by the line scanning order at least, and district's blank time domain is set after each picture domain scanning finishes; One or more pictures district to other in district's blank time domain in current display frame district imports a certain fixed gray level voltage.
Help the position that the next frame picture shows through liquid crystal molecule being rotated in advance one, can improve the rotational speed of liquid crystal molecule.With respect to the existing method of after a two field picture been scanned, inserting gray scale voltage, liquid crystal display driving method of the present invention is that subregion ground inserts gray scale voltage in every two field picture scanning process, thereby has improved the whole display quality of picture.
Gray scale voltage in the liquid crystal display driving method of the present invention can be high gray voltage, also can be low gray scale voltage.Import in these two kinds of gray scale voltages any and can realize goal of the invention.But, be greater than by black to white rotational time (about 3ms) by white extremely black rotational time (about 9ms) according to the characteristic of common liquid crystal display.So being input, preferred mode hangs down gray scale voltage.
Liquid crystal display driving method of the present invention comprises the steps: at least
3.1 each picture of every two field picture is divided into m picture district by the line scanning order, and wherein m is not less than 3 integer; District's blank time domain, each picture domain scanning is set after finishing.Can the liquid crystal molecule of picture remainder be rotated by stages in advance through the division in picture district and to carry out, the low gray scale voltage of input causes the most last several row of picture to show unintelligible when avoiding the ending of view picture picture.
3.2 the gate line of liquid crystal display receives the instruction of picture domain scanning; The source electrode line of liquid crystal display receives picture district picture data.The contents such as occurrence that position and input gray scale voltage are set of the displaying contents in picture district, district's blank time domain all are presented on the liquid crystal display through gate line and source electrode line.
3.3 when being in the scanning time domain, gate line scans the picture district, source electrode line supplies gray scale voltage for the picture district.At this moment, the action of gate line and source electrode line is identical with the gate line and the source electrode line of common liquid crystals screen.
3.4 when getting into district's blank time domain, to other one or more pictures district input gray scale voltage.This step is subregion input gray scale voltage, reaches the purpose of quickening the liquid crystal molecule rotation.
3.5 get into the scanning time domain and district's blank time domain, repeating step 3.2 to 3.4 in next picture district.Gray scale voltage is all scanned and imports in a plurality of pictures district in every frame picture successively, and the been scanned of this frame picture is carried out the demonstration of next frame picture again, and cycle repeats step 3.2 is to 3.4 until showing task termination.
In order to keep the effective control to liquid crystal molecule, the duration of gray scale voltage is shorter than the duration of district's blank time domain in the step 3.1.
Step 3.4 is to some or several pictures district input gray scale voltage, comprises the steps: at least
Whole gate lines in other one or more pictures district are all opened; Source electrode line is imported gray scale voltage in above-mentioned picture district.
Accomplish the work of above-mentioned input gray scale voltage through the cooperation of gate line and source electrode line.
Which which in the liquid crystal display driving method of the present invention, specify by the liquid crystal display control module to or picture district input input gray scale voltage.Use the liquid crystal display of this driving method and before using, need confirm to be divided into the corresponding relation between what picture districts and district's blank time domain and the input gray scale voltage picture district earlier.
Corresponding relation between district's blank time domain and the input gray scale voltage picture district is:
After picture district s been scanned, get into the regional blank time domain in s district, picture district t is transfused to gray scale voltage.After picture district s+1 been scanned, get into the regional blank time domain in s+1 district, picture district t+1 is transfused to gray scale voltage.Promptly import gray scale voltage successively.As t during greater than the line number of liquid crystal display, the picture district that is transfused to gray scale voltage is that sequence number is the picture district of t-liquid crystal display line number.As the numerical value t of accumulative total during, need be from first district of liquid crystal area count from newly beginning greater than the line number of liquid crystal display.Wherein, s is not equal to t.
Because the uncertainty of picture district quantity, and s and t do not have specific formula to confirm the relation between them, so liquid crystal display need confirm that the N district began to import gray scale voltage after first domain scanning finishes through the method for experiment before using.
In order to realize above-mentioned liquid crystal display driving method; LCD of the present invention comprises liquid crystal display and screen control module at least; The screen control module is used for each picture of every two field picture is divided at least three picture districts by the line scanning order; Press the picture district and send the line scanning instruction, district's blank time domain is set after each picture domain scanning is accomplished to the gate line of liquid crystal display; In district's blank time domain in current display frame district, the screen control module sends the instruction of opening one or more other picture districts to the gate line of liquid crystal display, to the source electrode line input gray scale voltage of liquid crystal display.
Through in advance program curing or module are confirmed division, district's blank time domain in picture district and import corresponding relation and the information such as input of sweep signal and gray scale voltage between the gray scale voltage picture district that LCD of the present invention has been realized above-mentioned liquid crystal display driving method well in the screen control module.
In order to realize above-mentioned functions, the screen control module comprises TCON plate and grid driver element that links to each other with the TCON plate and source driver element; Wherein, the grid driver element connects TCON plate and gate line, opens the picture district of scanning usefulness or the picture district of input gray scale voltage according to the instruction of TCON plate; The source driver element connects TCON plate and source electrode line, according to the instruction input display frame voltage or the gray scale voltage of TCON plate.
TCON plate, grid driver element and source driver element etc. have similarity with existing product, but need to do corresponding change the, especially grid driver element.Be in the scanning time domain, identical with TCON plate, the grid driver element of existing product with source driver element effect.But when being in district's blank time domain, the TCON plate of LCD of the present invention, grid driver element and source driver element just need to accomplish the work of input gray scale voltage.
Above-mentioned gray scale voltage can be for high gray voltage, also can be low gray scale voltage.But, be greater than by black to white rotational time (about 3ms) by white extremely black rotational time (about 9ms) according to the characteristic of common liquid crystal display.So the low gray scale voltage of input can be obtained better effect usually.
Preferred embodiment one: each picture of every two field picture is divided into 4 picture districts by the line scanning order, district's blank time domain is set after each picture domain scanning finishes.Being the source driver element is divided into 4 district's blank time domain with of the prior art blank time domain, and comes subregion to send voltage to give liquid crystal display according to the division in 4 picture districts, and in each picture domain scanning setting area, back blank time domain that finishes.
The grid driver element cooperates the source driver element to realize following function:
When 1 district line by line scan finish after, the district's blank time domain that gets into 1 district, the grid driver element is all opened 3 district's gate lines, the source driver element send the high gray voltage of short time to 3 districts, then the pixel in 3 districts completely shows the high gray picture at this moment.
When 2 districts line by line scan finish after, the district's blank time domain that gets into 2 districts, the grid driver element is all opened 4 district's gate lines, the source driver element send the high gray voltage of short time to 4 districts, then the pixel in 4 districts completely shows the high gray picture at this moment.
When 3 districts line by line scan finish after, the district's blank time domain that gets into 3 districts, the grid driver element is all opened 1 district's gate line, the source driver element send the high gray voltage of short time to 1 district, then the pixel in 1 district completely shows the high gray picture at this moment.
When 4 districts line by line scan finish after, the district's blank time domain that gets into 4 districts, the grid driver element is all opened 2 district's gate lines, the source driver element send the high gray voltage of short time to 2 districts, then the pixel in 2 districts completely shows the high gray picture at this moment.
In this preferred embodiment liquid crystal molecule is carried out the split screen district and drives, rotate to the stable state of previous frame picture when liquid crystal molecule after, make it begin dbjective state rotation in advance, thereby before the next frame driving voltage arrives, rotate to high gray to high gray.Have the liquid crystal molecule of certain probability to be the high gray state in the next frame picture, they can reach stable state apace.The liquid crystal molecule of all the other positions is asked to reach low gray scale states, and they rotated to dbjective state and got final product this moment.Improved the whole reversal rate of liquid crystal molecule.Phenomenons such as the smear that can improve under the dynamic menu significantly to be produced, stagnation.
Preferred embodiment two: each picture of every two field picture is divided into 4 picture districts by the line scanning order, district's blank time domain is set after each picture domain scanning finishes.Being the source driver element is divided into 4 district's blank time domain with the field blank time domain of prior art, and comes subregion to send voltage to give liquid crystal display according to the division in 4 picture districts, and in each picture domain scanning setting area, back blank time domain that finishes.
The grid driver element cooperates the source driver element to realize following function:
When 1 district line by line scan finish after, the district's blank time domain that gets into 1 district, the grid driver element is all opened 3 district's gate lines, the source driver element send the low gray scale voltage of short time to 3 districts, then the pixel in 3 districts completely shows low grey menu at this moment.
When 2 districts line by line scan finish after, the district's blank time domain that gets into 2 districts, the grid driver element is all opened 4 district's gate lines, the source driver element send the low gray scale voltage of short time to 4 districts, then the pixel in 4 districts completely shows low grey menu at this moment.
When 3 districts line by line scan finish after, the district's blank time domain that gets into 3 districts, the grid driver element is all opened 1 district's gate line, the source driver element send the low gray scale voltage of short time to 1 district, then the pixel in 1 district completely shows low grey menu at this moment.
When 4 districts line by line scan finish after, the district's blank time domain that gets into 4 districts, the grid driver element is all opened 2 district's gate lines, the source driver element send the low gray scale voltage of short time to 2 districts, then the pixel in 2 districts completely shows low grey menu at this moment.
The sequential chart of each unit of whole liquid crystal display drive system is as shown in Figure 3.
This preferred embodiment is that the high gray voltage of importing becomes low gray scale voltage with the key distinction of preferred embodiment one.For liquid crystal display commonly used, by white to black rotational time be about 9ms, this time greater than by black to white rotational time (about 3ms).Therefore for the 120HZ panel, every frame demonstration time is 1 second/120 frames=8.33ms, by black to the white stable state time be 8.33-3=5.33ms, by white to the black stable state time then be 0.Because each zone all can shift to an earlier date general 4.17ms and receives low gray scale voltage, then white in theory can about in advance 4ms to black turning point, consider the duration of charging of TFT and the torpid reaction of liquid crystal molecule, the turning point of then extremely deceiving in vain can about in advance 3.5ms about.Like this, no matter black still white for the conversion of the black and white under the 3D, all have the stable state time about about 2ms.
In view of liquid crystal molecule by black to white rotary speed faster than by white to black speed; Allow liquid crystal molecule after previous frame arrives stable state, begin turning in advance to low gray scale states; Then if the next frame picture is low GTG, this liquid crystal molecule can reach low GTG stable state fast; If the next frame picture is a high gray, this liquid crystal molecule also can arrive stable state in 5ms.Thereby right and left eyes crossfire value, optimization 3D effect under the rotation of realization acceleration liquid crystal molecule, the reduction 3D.
Preferred embodiment three: each picture of every two field picture is divided into 100 picture districts by the line scanning order, district's blank time domain is set after each picture domain scanning finishes.Be that the source driver element is divided into 100 district's blank time domain with of the prior art blank time domain, and come subregion to send voltage to give liquid crystal display according to the division in 100 picture districts, subregion is lined by line scan.After 5 domain scannings finish; Get into district's blank time domain in 5 districts; The grid driver element is all opened the gate line in 50 districts to 59 districts, and the source driver element send the low gray scale voltage of short time to above-mentioned 10 picture districts, and then the pixel in above-mentioned 10 picture districts this moment completely shows low grey menu.
Continuing subregion lines by line scan; After 20 domain scannings finish; Get into district's blank time domain in 20 districts; The grid driver element is all opened 60 districts to 69 districts gate line, and the source driver element send the low gray scale voltage of short time to above-mentioned 10 picture districts, and then the pixel in above-mentioned 10 districts this moment completely shows low grey menu.
Aforesaid operations is carried out in circulation, accomplishes the scanning of a frame picture.
This preferred embodiment is to insert district's blank time domain as required with the difference of preferred embodiment two, and the district of the low gray scale voltage of each input can be a plurality of.So just can help keeping the brightness and the definition of picture based on the opportunity of selecting to import low gray scale voltage based on the situation of concrete display frame neatly.
More than; Be merely preferred embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain that claim was defined.
Claims (10)
1. liquid crystal display driving method; It is characterized in that: said method is divided at least three picture districts for each picture to every two field picture by the line scanning order; On liquid crystal display, scan, district's blank time domain is set after each picture domain scanning finishes by the picture district; One or more pictures district to other in district's blank time domain in current display frame district imports a certain fixed gray level voltage.
2. liquid crystal display driving method according to claim 1 is characterized in that: said a certain fixed gray level voltage is high gray voltage or low gray scale voltage.
3. liquid crystal display driving method according to claim 1 is characterized in that: said method comprises the steps: at least
3.1 each picture of every two field picture is divided into m picture district by the line scanning order, and wherein m is not less than 3 integer; District's blank time domain, each picture domain scanning is set after finishing;
3.2 the gate line of liquid crystal display receives the instruction of picture domain scanning; The source electrode line of liquid crystal display receives picture district picture data;
3.3 when being in the scanning time domain, gate line scans the picture district, source electrode line supplies gray scale voltage for the picture district;
3.4 when getting into district's blank time domain, to other one or more pictures district importing a certain fixed gray level voltage;
3.5 get into the scanning time domain and district's blank time domain, repeating step 3.2 to 3.4 in next picture district.
4. liquid crystal display driving method according to claim 3 is characterized in that: the duration of gray scale voltage described in the step 3.1 is shorter than the duration of district's blank time domain.
5. liquid crystal display driving method according to claim 3 is characterized in that: a certain fixed gray level voltage of input comprises the steps: at least in the step 3.4
Whole gate lines in other one or more pictures district are all opened;
Source electrode line is imported a certain fixed gray level voltage in above-mentioned picture district.
6. liquid crystal display driving method according to claim 5 is characterized in that: the picture district that imports a certain fixed gray level voltage is specified by the liquid crystal display control module.
7. liquid crystal display driving method according to claim 3 is characterized in that, district's blank time domain and the corresponding relation of importing between a certain fixed gray level voltage picture district are:
After picture district s been scanned, get into the regional blank time domain in s district, picture district t is transfused to gray scale voltage;
After picture district s+1 been scanned, get into the regional blank time domain in s+1 district, picture district t+1 is transfused to gray scale voltage;
As t during greater than the line number of liquid crystal display, the picture district that is transfused to gray scale voltage is that sequence number is the picture district of t-liquid crystal display line number;
Wherein, s is not equal to t.
8. LCD; At least comprise liquid crystal display and screen control module; It is characterized in that: said screen control module is used for each picture of every two field picture is divided at least three picture districts by the line scanning order; Press the picture district and send the line scanning instruction, district's blank time domain is set after each picture domain scanning is accomplished to the gate line of liquid crystal display; In district's blank time domain in current display frame district, said screen control module sends the instruction of opening one or more other picture districts to the gate line of liquid crystal display, imports a certain fixed gray level voltage to the source electrode line of liquid crystal display.
9. LCD according to claim 8 is characterized in that, said screen control module comprises TCON plate and the grid driver element and the source driver element that link to each other with said TCON plate; Wherein, said grid driver element connects TCON plate and gate line, opens the picture district of scanning usefulness or the picture district of input gray scale voltage according to the instruction of TCON plate; Said source driver element connects TCON plate and source electrode line, according to the instruction input display frame voltage or a certain fixed gray level voltage of TCON plate.
10. LCD according to claim 9 is characterized in that, said gray scale voltage is high gray voltage or low gray scale voltage.
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| CN2012102285016A CN102708835A (en) | 2012-07-03 | 2012-07-03 | Drive method of liquid crystal display screen and liquid crystal display |
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| CN2012102285016A CN102708835A (en) | 2012-07-03 | 2012-07-03 | Drive method of liquid crystal display screen and liquid crystal display |
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| WO2017004979A1 (en) * | 2015-07-06 | 2017-01-12 | 京东方科技集团股份有限公司 | Data line drive method and unit, source driver, panel drive device and display device |
| CN106847207A (en) * | 2017-01-06 | 2017-06-13 | 京东方科技集团股份有限公司 | A kind of driving method of display panel, display panel and display device |
| CN109166545A (en) * | 2018-09-27 | 2019-01-08 | 京东方科技集团股份有限公司 | AR/VR shows driving method, driving device and the display equipment of equipment |
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Application publication date: 20121003 |