CN101572065A - Driving device and method and liquid crystal display (LCD) using same - Google Patents
Driving device and method and liquid crystal display (LCD) using same Download PDFInfo
- Publication number
- CN101572065A CN101572065A CNA2009101116273A CN200910111627A CN101572065A CN 101572065 A CN101572065 A CN 101572065A CN A2009101116273 A CNA2009101116273 A CN A2009101116273A CN 200910111627 A CN200910111627 A CN 200910111627A CN 101572065 A CN101572065 A CN 101572065A
- Authority
- CN
- China
- Prior art keywords
- subregion
- data
- picture
- picture frame
- color
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a driving device, a driving method and a liquid crystal display (LCD) using the same. The driving method comprises the following steps: setting a color display order, namely RGBG, RGRB or RBGB; alternatively reading drawing frame data in a first drawing frame buffer and a second drawing frame buffer based on a drawing frame cycle which comprises three drawing frame periods; successively displaying four color data in a cycle period having four sub-drawing frame periods according to the color display order and read drawing frame data. The driving method of the invention can improve cross-color of color sequential LCD under low temperature environment.
Description
[technical field]
The present invention is relevant for a kind of drive unit and driving method of LCD, and particularly relevant for the Drive And Its Driving Method of the LCD of using look preface method.
[background technology]
Because LCD (Liquid Crystal Display, LCD) have advantages such as low-power consumption, ultra-thin, light, low voltage drive, be used in widely on the various electronic installations, for example shot with video-corder on projector, notebook computer, console display, mobile phone and other the various projector equipments.With regard to display device, (Thin Film Transistor Liquid Crystal Display TFT-LCD) becomes the main flow in market gradually particularly to have the Thin Film Transistor-LCD of the high and low power consumption of high spatial utilization ratio, advantageous characteristic such as radiationless.
The display quality of LCD is influenced by the liquid crystal reaction velocity mainly, and under the environment of low temperature, the reaction velocity of liquid crystal can be slack-off, and the problem that the color of its demonstration this moment just has distortion produces.In addition, at color sequential liquid crystal display (Field sequential color LCD, be called for short FSC-LCD) in, except the reaction velocity of liquid crystal can influence image quality, the order (the perhaps DISPLAY ORDER of RGB subgraph frame) that the coloured light color is switched also can influence the degree of its cross-color.When the liquid crystal reaction velocity is slack-off, if RGB subgraph frame is that order is to change green (G) by red (R), (G) green commentaries on classics blue (B), when blue (B) changeed red (R), the degree of its picture distortion can be comparatively serious, as shown in Figure 1, Fig. 1 has been for having illustrated chroma curve scope under the different liquid crystal reaction velocitys according to prior art, when the liquid crystal reaction velocity heals when slow, its displayable color saturation is lower, and red originally color can be partial to green, and green originally color can be partial to blueness.
[summary of the invention]
One of the technical problem to be solved in the present invention, be to provide a kind of driving method, the order of color conversion is changed to improve the problem of color distortion, simultaneously in conjunction with DISPLAY ORDER backlight, can make the color of tableaux more true to nature, and can be used for improving the liquid crystal display quality under the low temperature environment.
One of the technical problem to be solved in the present invention is achieved in that a kind of driving method, be applicable to the drive unit and the backlight module of a LCD, this drive unit upgrades one second stored drawing frame data in one first stored picture frame data of one first picture frame buffer and the one second picture frame buffer successively, this the first picture frame data and second drawing frame data include R, G, three kinds of color data of B, this backlight module is divided into one first subregion according to the one scan direction of this drive unit, one second subregion and one the 3rd subregion, this display packing comprises the steps:
Step 2, alternately read this first picture frame data and this second drawing frame data according to a picture frame cycle, this picture frame cycle comprises during three sub-picture frames;
Step 3, in a cycle period, according to the color DISPLAY ORDER that sets and the described first picture frame data or second drawing frame data that are read, show four color data successively, wherein this cycle period comprises during four sub-picture frames, show during each subgraph frame those color data one of them.
Wherein, described step 3 also comprises: in during the first subgraph frame during four sub-picture frames of described cycle period, according to pairing one first color data during this first subgraph frame, upgrade this first subregion, second subregion and the shown coloured light of the 3rd subregion successively; Wherein, when upgrading this first subregion, this second subregion black plug; When upgrading this second subregion, the 3rd subregion black plug; When upgrading the 3rd subregion, this first subregion black plug.
Wherein, described step 3 also comprises: in during the second subgraph frame of described cycle period, according to pairing one second color data during this second subgraph frame, upgrade this first subregion, second subregion and the shown coloured light of the 3rd subregion successively; Wherein, when upgrading this first subregion, this second subregion black plug; When upgrading this second subregion, the 3rd subregion black plug; When upgrading the 3rd subregion, this first subregion black plug.
Wherein, described second subregion is between described first subregion and the 3rd subregion.
Wherein, described first color data is R, G or B.
Two of the technical problem to be solved in the present invention, be to provide a kind of LCD, the order of color conversion is changed to improve the problem of color distortion, simultaneously in conjunction with DISPLAY ORDER backlight, can make the color of tableaux more true to nature, and can be used for improving the liquid crystal display quality under the low temperature environment.
Two of the technical problem to be solved in the present invention is achieved in that a kind of LCD, comprise a liquid crystal panel, a drive unit and a backlight module, this drive unit is in order to drive this liquid crystal panel, and this drive unit upgrades one of stored second drawing frame data in one of stored first picture frame data of one first picture frame buffer and the one second picture frame buffer more successively, each drawing frame data comprises R, G, three kinds of color data of B, described backlight module, in order to provide one backlight, it is characterized in that to this liquid crystal panel:
Described drive unit is more in order to carry out the following step:
Step 2, alternately read this first picture frame data and this second drawing frame data according to a picture frame cycle, this picture frame cycle comprises during three sub-picture frames;
Step 3, in a cycle period, according to the color DISPLAY ORDER that sets and the described first picture frame data or second drawing frame data that are read, show four color data successively, wherein this cycle period comprises during four sub-picture frames, show during each this subgraph frame those color data one of them;
Described backlight module is then divided into one first subregion, one second subregion and one the 3rd subregion according to the one scan direction of described drive unit, and in during the first subgraph frame in described cycle period, according to pairing one first color data during this first subgraph frame, upgrade this first subregion, second subregion and the shown coloured light of the 3rd subregion successively, wherein when upgrading this first subregion, this second subregion black plug; When upgrading this second subregion, the 3rd subregion black plug; When upgrading the 3rd subregion, this first subregion black plug.
Wherein, described second subregion is between described first subregion and the 3rd subregion.
Wherein, a described color data is R, G or B.
Three of the technical problem to be solved in the present invention, be to provide a kind of drive unit, utilize specific color conversion to drive LCD in proper order, in RGB look preface originally, insert a color data and change the color sequences of its demonstration to improve the problem of its color distortion.
Three of the technical problem to be solved in the present invention is achieved in that a kind of drive unit that is applied to a LCD, comprising:
One line buffer is in order to keep in a plurality of scan-line datas that an image processor is exported;
One picture frame buffer is electrically connected at this line buffer, reads those number of scanning lines via this line buffer and upgrades a drawing frame data that is stored in this picture frame buffer according to this, and this drawing frame data comprises R, G, three kinds of color data of B; And
Time schedule controller is electrically connected at this line buffer and this picture frame buffer, in order to reading this drawing frame data in this picture frame buffer, and in order to control the sequential that this picture frame buffer upgrades this drawing frame data;
Described time schedule controller is in order to carry out the following step:
Set a color DISPLAY ORDER, this color DISPLAY ORDER is RGBG, RGRB or RBGB;
In a cycle period, according to this color DISPLAY ORDER and this drawing frame data of being read, show four color data successively, wherein this cycle period comprises during four sub-picture frames, show during each subgraph frame those color data one of them; And
During the one first subgraph frame in this cycle period, scan a plurality of sweep trace picture elements in the liquid crystal panel successively according to the drawing frame data in this picture frame buffer;
Wherein, when upgrading stored drawing frame data with described scan-line data as yet as if described picture frame buffer, described time schedule controller is then according to the sweep trace picture element in this this liquid crystal panel of drawing frame data continuation scanning.
Four of the technical problem to be solved in the present invention, be to provide another kind of LCD, its employed drive unit utilizes specific color conversion to drive LCD in proper order, inserts a color data and change the color sequences of its demonstration to improve the problem of its color distortion in RGB look preface originally.
Four of the technical problem to be solved in the present invention is achieved in that a kind of LCD, comprise a liquid crystal panel, a drive unit and a backlight module, described drive unit is in order to drive this liquid crystal panel, described backlight module is in order to provide one backlight to this liquid crystal panel, and it is characterized in that: this drive unit also comprises:
One line buffer is in order to keep in a plurality of scan-line datas that an image processor is exported;
One picture frame buffer is electrically connected at this line buffer, reads those number of scanning lines via this line buffer and upgrades a drawing frame data that is stored in this picture frame buffer according to this, and this drawing frame data comprises R, G, three kinds of color data of B; And
Time schedule controller is electrically connected at this line buffer and this picture frame buffer, in order to reading this drawing frame data in this picture frame buffer, and in order to control the sequential that this picture frame buffer upgrades this drawing frame data;
Wherein, the performed step of this time schedule controller comprises:
Set a color DISPLAY ORDER, this color DISPLAY ORDER is RGBG, RGRB or RBGB;
In a cycle period, according to this color DISPLAY ORDER and the drawing frame data that read, show four color data successively, wherein this cycle period comprises during four sub-picture frames, show during each subgraph frame those color data one of them; And
During the one first subgraph frame in this cycle period, scan a plurality of sweep trace picture elements in the liquid crystal panel successively according to the drawing frame data in this picture frame buffer; When wherein upgrading stored drawing frame data with described scan-line data as yet as if described picture frame buffer, described time schedule controller is then according to the sweep trace picture element in this this liquid crystal panel of drawing frame data continuation scanning;
Described backlight module is also divided into one first subregion, one second subregion and one the 3rd subregion according to the one scan direction of described time schedule controller, and in during the first subgraph frame in this cycle period, according to pairing one first color data during this first subgraph frame, upgrade this first subregion, one second subregion and the shown coloured light of one the 3rd subregion successively, wherein when upgrading this first subregion, this second subregion black plug; When upgrading this second subregion, the 3rd subregion black plug; When upgrading the 3rd subregion, this first subregion black plug.
Wherein, described second subregion is between described first subregion and the 3rd subregion.
Wherein, described first color data is R, G or B.
The present invention has following advantage: because of adopting specific color DISPLAY ORDER and cooperate specific backlight driving method to show, therefore can reduce by red commentaries on classics greenly, the color distortion when green commentaries on classics indigo plant or Lan Zhuanhong is particularly useful under static image or the low temperature environment.In addition.The present invention can directly show according to its color DISPLAY ORDER and the drawing frame data that is stored in the picture frame impact damper at present, and not mind whether its picture frame data has been upgraded when showing, just ignores whether complete being presented on the picture of raw video data.Therefore, technical scheme of the present invention can be directly combines with traditional color sequential liquid crystal display, and the driving sequential that only need adjust its time schedule controller gets final product.
[description of drawings]
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the chroma curve under the different liquid crystal reaction velocitys.
Fig. 2 is according to color sequential liquid crystal display installation drawing in the first embodiment of the invention.
Fig. 3 A is the circuit diagram according to drive unit in the first embodiment of the invention 230.
Fig. 3 B is the display timing generator synoptic diagram according to first embodiment of the invention.
Fig. 4 is the subregion synoptic diagram according to backlight module in the first embodiment of the invention 220.
Fig. 5 is the coloured light renewal synoptic diagram according to backlight module in the first embodiment of the invention 220.
Fig. 6 is according to display packing process flow diagram in the second embodiment of the invention.
Fig. 7 is the circuit diagram according to drive unit in the third embodiment of the invention.
Fig. 8 is a chroma curve scope according to the above embodiment of the present invention.
[embodiment]
First embodiment
See also shown in Figure 2ly, Fig. 2 is according to color sequential liquid crystal display installation drawing in the first embodiment of the invention.LCD 200 comprises liquid crystal panel 210, backlight module 220 and drive unit 230.Backlight module 220 is arranged at the rear of liquid crystal panel 210, and in order to providing liquid crystal panel 210 required backlight, drive unit 230 then is used for driving picture element in the liquid crystal panel 210 with show image.Backlight module 220 can cooperate the driving sequential color DISPLAY ORDER corresponding with it of drive unit 230 to send corresponding coloured light.
In the present embodiment, liquid crystal panel 210 and backlight module 220 shown color sequences are RGBG, and wherein R, G, B represent the three primary colors (red, green, blue) of light.Compare with the color DISPLAY ORDER RGB of prior art, present embodiment can insert the subgraph frame of a G behind intact three the sub-picture frames of RGB of every demonstration.The color data of G subgraph frame then directly adopts the drawing frame data in the picture frame buffer of depositing in drive unit 230 instantly, and does not mind whether the drawing frame data of raw video picture intactly is presented on the picture.In other words, the picture frame display packing of present embodiment mainly is the DISPLAY ORDER of subgraph frame, and ignore the validity of its picture frame data, no matter therefore whether the present drawing frame data that reads is the drawing frame data that present institute desire shows, as long as its corresponding color data is identical.By the color DISPLAY ORDER of RGBG, can reduce and avoid red commentaries on classics green, the converse routine of green commentaries on classics indigo plant or Lan Zhuanhong is to reduce the problem of color distortion.
Next, further specify drive unit 230, please refer to Fig. 3 A, Fig. 3 A is the circuit diagram according to drive unit in the first embodiment of the invention 230.Drive unit 230 comprises picture frame buffer 320,330 and time schedule controller 340 at least, the image data that drive unit 230 is exported image processor 310 (comprises a plurality of drawing frame data, each drawing frame data then comprises a plurality of scan-line datas, also can be divided into three kinds of color data of RGB) alternately be stored in the picture frame buffer 320,330 to upgrade the drawing frame data in the picture frame buffer 320,330.Wherein, this picture frame buffer 320,330 can be made up of two buffers respectively, also can be in the same memory storage two memory sectors, as long as picture frame buffer 320,330 can be supported the function that reads or writes respectively.
Picture frame buffer 320,330 can be switched the path of its read-write by switch 312,314, when picture frame buffer 320 was storing the image data that image processor 310 exported, time schedule controller 340 read drawing frame data in the picture frame buffer 330 to show via switch 314.Otherwise when picture frame buffer 330 was storing the image data that image processor 310 exported, time schedule controller 340 read drawing frame data in the picture frame buffer 320 to show via switch 314.
Please be simultaneously with reference to Fig. 3 B, Fig. 3 B is the display timing generator synoptic diagram according to present embodiment.Time schedule controller 340 is alternately to read drawing frame data in the picture frame buffer 320,330 according to picture frame cycle FP1～FP4, and each picture frame cycle FP1～FP4 comprises SP during three sub-picture frames.SP was to show four color data of RGBG successively during each cycle period CP1～CP3 then comprised four sub-picture frames.Therefore, the length of each cycle period CP1～CP3 and each picture frame cycle FP1～FP4 and inconsistent.Because time schedule controller 340 reads picture frame buffer 330 at picture frame cycle FP1, so show from the color data R330 in the picture frame buffer 330, G330, B330 in during the sub-picture frame of first three among the cycle period CP1.Then show from the color data G330 in the picture frame buffer 320 during the 4th the sub-picture frame in cycle period CP1.
Then, enter next cycle period CP2, come display frame with the color DISPLAY ORDER of RGBG equally, but its color data is then respectively from picture frame buffer 320 (color data R320, G320) and picture frame buffer 330 (color data B330, G330).Though in picture frame cycle FP2, color data B320 corresponding to B in the picture frame buffer 320 is not shown, when entering picture frame cycle FP3, then equally the path of reading is switched to picture frame buffer 330, and show according to the drawing frame data in the picture frame buffer 330, and ignore the color data B320 that in last picture frame cycle FP2, does not show, the rest may be inferred by analogy for it.
From the above, the Data Update of picture frame buffer 320,330 with read sequential and can carry out according to sequential of the prior art, time schedule controller 340 then adopts the color DISPLAY ORDER of RGBG to come display frame.When showing, 340 of time schedule controllers are lain in the color DISPLAY ORDER, and whether do not mind its color data corresponding to same picture frame or from same picture frame buffer 320 or 330, and the color data that is not shown then is directly to ignore not show.
In addition, it should be noted that the color DISPLAY ORDER that time schedule controller 340 sets is not restricted to RGBG, also can be RGRB or RBGB.With RGBG, R and B are all surrounded by G, and the situation that can avoid B to change R takes place; With RGRB, wherein G and B are all surrounded by R, and the situation that can avoid G to change B takes place; With RBGB, wherein R and G are all surrounded by B, and the situation that can avoid R to change G takes place, and therefore, above color conversion order all has the effect of improving color distortion.Present technique field those skilled in the art should know the implementation detail of RGRB or RBGB by inference easily via the explanation of the foregoing description, repeat no more herein.
Next, further specify the driving method of backlight module 220 in the present embodiment, please be simultaneously with reference to Fig. 4, Fig. 4 is the subregion synoptic diagram according to backlight module in the present embodiment 220.Backlight module 220 can be divided into first subregion 410, second subregion 420 and the 3rd subregion 430 according to drive unit 230 direction of scanning of (Fig. 4 does not show) (for example from top to bottom).Backlight module 220 can upgrade first subregion 410, second subregion 420 and the 3rd subregion 430 corresponding to color data successively according to middle institute during each subgraph frame.
With SP during the first subgraph frame among the cycle period CP1 is example (seeing Fig. 3 B), is its corresponding color data that R320 (should be R330?), just red.Therefore, first subregion 410, second subregion 420 and the 3rd subregion 430 can show the sequential and zone of red coloured light with matching timing controller 340 scanning liquid crystal panels 210 successively.In addition, produce the problem of mixed light, can carry out black plug (closing backlight) at the next subregion of the subregion that is updated for avoiding the adjacent subarea territory.Therefore, when upgrading the coloured light of first subregion 410, second subregion, 420 black plugs; When upgrading the coloured light of second subregion 420, the 3rd subregion 430 black plugs; When upgrading the coloured light of the 3rd subregion 430, first subregion, 410 black plugs.Finish three refresh routines in the time of backlight module 220 meeting SP during each subgraph frame, just upgrade the coloured light of first subregion 410, second subregion 420 and the 3rd subregion 430 successively.
Please refer to Fig. 5, Fig. 5 is the coloured light renewal synoptic diagram according to backlight module in the present embodiment 220.With SP during first subgraph frame among the cycle period CP1 is example, and wherein preceding 1/3 time T 1 of SP is upgraded the coloured light of first subregion 410 during first subgraph frame, and first subregion 410 shows corresponding red light, second subregion, 420 black plugs; Second 1/3 time T 2 of SP upgraded the coloured light of second subregion 410 during first subgraph frame, and second subregion 420 shows corresponding red light, the 3rd subregion 430 black plugs; Back 1/3 time T 3 of SP is upgraded the coloured light of the 3rd subregion 430 during the first subgraph frame, and the 3rd subregion 430 shows corresponding red light, first subregion, 410 black plugs.
In the time of during the second subgraph frame in entering cycle period CP1, then upgrade first subregion 410, second subregion 420 and the 3rd subregion 430 with green light successively.During different subgraph frames, its main difference is the coloured light difference upgraded, and all the other operating processes are then in like manner analogized, and repeat no more.
Second embodiment
By above-mentioned first embodiment as can be known, the present invention can summarize a kind of display packing of LCD, please be simultaneously with reference to Fig. 5 and Fig. 6, and Fig. 6 is according to display packing process flow diagram in the second embodiment of the invention.This display packing is applicable to for example drive unit 230 and backlight module 220 of the LCD of above-mentioned Fig. 2, drive unit 230 can upgrade the stored drawing frame data (the following first picture frame data and second drawing frame data of being referred to as respectively) of picture frame buffer 320,330 successively, each drawing frame data comprises R, G, three kinds of color data of B, and above-mentioned backlight module 220 is divided into one first subregion, one second subregion and one the 3rd subregion according to the direction of scanning of drive unit 230.
At first, (step 1) alternately reads drawing frame data in the picture frame buffer 320,330 according to a picture frame cycle then, and the above-mentioned picture frame cycle shows three color data (step 2) with correspondence during then comprising three sub-picture frames equally to set a color DISPLAY ORDER.Next, in a cycle period, according to above-mentioned color DISPLAY ORDER and the first picture frame data or second drawing frame data that are read, show four color data successively, wherein above-mentioned cycle period comprises that during four sub-picture frames, each subgraph frame shows one of them (step 3) of above-mentioned color data.Wherein, above-mentioned color DISPLAY ORDER is RGBG, RGRB or RBGB.
It should be noted that in above-mentioned steps 3 data that read are that the first picture frame data or the second picture frame data mainly are to decide according to the picture frame cycle.Whenever, just can switch once through a picture frame cycle, required color data then comes from the current picture frame buffer that can read 320,330 when showing, is not limited to the first picture frame data or second drawing frame data.In other words, present embodiment is to switch according to the picture frame cycle when reading the picture frame data, and is the switching of carrying out color according to cycle period when showing, each cycle period not necessarily can be corresponding to a complete picture.When showing, can directly utilize the drawing frame data that can read instantly to show only lie in its color DISPLAY ORDER, and whether ignore the pairing picture frame of its color data identical.
In addition, also comprise control backlight in above-mentioned steps 3: in during the one first subgraph frame in cycle period, according to pairing color data during the first subgraph frame, upgrade first subregion, one second subregion and the shown coloured light of one the 3rd subregion successively; Wherein, when upgrading first subregion, the second subregion black plug; When upgrading second subregion, the 3rd subregion black plug; When upgrading the 3rd subregion, the first subregion black plug.Implementation detail about backlight control please refer to above-mentioned explanation to Fig. 4, Fig. 5.All the other details of operations of present embodiment please refer to the explanation of above-mentioned first embodiment, repeat no more.
The 3rd embodiment
In conjunction with above-mentioned display method, the present invention carries a kind of drive unit that reduces the picture frame buffer again, please refer to Fig. 7, and Fig. 7 is the circuit diagram according to drive unit in the third embodiment of the invention.Drive unit 730 is electrically connected between image processor 310 and the liquid crystal panel 210, and wherein drive unit 730 still comprises line buffer 732, picture frame buffer 734 and time schedule controller 736.Picture frame buffer 734 is electrically connected between line buffer 732 and the time schedule controller 736, and time schedule controller 736 also is electrically connected to line buffer 732 upgrades drawing frame data via line buffer 732 with control picture frame buffer 734 sequential.
In the present embodiment, the picture frame renewal speed of time schedule controller 736 (frame rate) is not the integral multiple for image processor 310 output map frame data speed.Therefore, time schedule controller 736 is with the drawing frame data in the asynchronous mode access picture frame buffer 734 with image processor 310.Time schedule controller 736 can with fast speeds output map frame data to liquid crystal panel 210 to show.When time schedule controller 736 was reading picture frame buffer 734, the picture frame data that image processor 310 is exported can be deposited in line buffer 732 (according to the length of time, the picture element data of several sweep traces may only be arranged, can abbreviate scan-line data as).When time schedule controller 736 stops to read picture frame buffer 734, can make picture frame buffer 734 go scan-line data in the read line impact damper 732 to upgrade drawing frame data in the picture frame buffer 734.
If the frequency range of picture frame buffer 734 is enough wide, can finishes at the neutral gear that time schedule controller 736 stops to read picture frame buffer 734 and upgrade required drawing frame data.If the frequency range of picture frame buffer 734 is wide inadequately or the deficiency of time of its renewal, then time schedule controller 736 still can show according to old drawing frame data, can't wait for that picture frame buffer 734 finishes renewal.Same, the data in the line buffer 310 also can be upgraded according to the output speed of image processor 310, can't consider whether picture frame buffer 734 read.
In other words, in the present embodiment, time schedule controller 736 drives liquid crystal panel 210 according to the picture frame renewal rate of itself, and the image processor 310 then data output speed of basis itself comes the output map frame data, and both are independent of each other mutually.If the data in the picture frame buffer 734 are upgraded, then time schedule controller 736 shows new drawing frame data, if the data in the picture frame buffer 734 are not upgraded, then time schedule controller 736 shows old drawing frame data.Therefore, in whole image, the data that may have the picture element data of sweep trace partly and be according to previous picture show, its picture ratio that shows legacy data then according to the frequency range of picture frame buffer 734 with and the renewable time decide.In addition, what deserves to be mentioned is that when picture was tableaux, the display quality of present embodiment was also unaffected.
In other words, present embodiment promptly replaces two picture frame buffers 320,330 among above-mentioned Fig. 3 A to save the usage quantity of picture frame buffer with a line buffer 732 and picture frame buffer 734.About all the other details of operations of time schedule controller 736 then as the explanation of the time schedule controller 340 among above-mentioned first embodiment and the display packing among second embodiment, time schedule controller 736 promptly drives liquid crystal panel 210 according to the display packing among above-mentioned second embodiment in the present embodiment, and its details of operation does not repeat them here.Then please refer to the explanation of above-mentioned Fig. 5 about the details of operation of backlight module 220, do not repeat them here.
Fig. 8 is a chroma curve scope according to the above embodiment of the present invention, and comparison diagram 1 and Fig. 8 can find that the chroma curve scope of the foregoing description is comparatively linear, and its color distortion degree is lower.
In addition, the foregoing description can adopt the driving method of the foregoing description in conjunction with the conventional ADS driving method when showing tableaux, can switch to traditional driving method to improve the display quality of dynamic menu when showing dynamic menu.
In sum, the present invention utilizes the color DISPLAY ORDER of RGBG, RGRB or RBGB to upgrade panel, therefore can improve color sequential liquid crystal display produces cross-color because of liquid crystal rotating speed step-down under low temperature environment problem.Simultaneously, the data access method that the present invention more proposes according to tableaux can further be saved cost to reduce the quantity required of picture frame buffer.Moreover the present invention is specially adapted to improve the picture display quality under the low temperature environment, improves picture produces cross-color because of liquid crystal rotating speed step-down problem.
Though more than described the specific embodiment of the present invention; but being familiar with those skilled in the art is to be understood that; our described specific embodiment is illustrative; rather than be used for qualification to scope of the present invention; those of ordinary skill in the art are in the modification and the variation of the equivalence of doing according to spirit of the present invention, all should be encompassed in the scope that claim of the present invention protects.
Claims (12)
1. driving method, be applicable to the drive unit and the backlight module of a LCD, this drive unit upgrades one second stored drawing frame data in one first stored picture frame data of one first picture frame buffer and the one second picture frame buffer successively, the described first picture frame data and second drawing frame data include R, G, three kinds of color data of B, this backlight module is divided into one first subregion, one second subregion and one the 3rd subregion according to the one scan direction of this drive unit, it is characterized in that this display packing comprises the steps:
Step 1, set a color DISPLAY ORDER, this color DISPLAY ORDER is a kind of among RGBG, RGRB or the RBGB three;
Step 2, alternately read this first picture frame data and this second drawing frame data according to a picture frame cycle, this picture frame cycle comprises during three sub-picture frames;
Step 3, in a cycle period, according to the color DISPLAY ORDER that sets and the described first picture frame data or second drawing frame data that are read, show four color data successively, wherein this cycle period comprises during four sub-picture frames, show during each this subgraph frame those color data one of them.
2. driving method as claimed in claim 1 is characterized in that, described step 3 also comprises:
During the first subgraph frame during four sub-picture frames of described cycle period,, upgrade this first subregion, second subregion and the shown coloured light of the 3rd subregion successively according to pairing one first color data during this first subgraph frame;
Wherein, when upgrading this first subregion, this second subregion black plug; When upgrading this second subregion, the 3rd subregion black plug; When upgrading the 3rd subregion, this first subregion black plug.
3. driving method as claimed in claim 2 is characterized in that, described step 3 also comprises:
During the second subgraph frame of described cycle period,, upgrade this first subregion, second subregion and the shown coloured light of the 3rd subregion successively according to pairing one second color data during this second subgraph frame;
Wherein, when upgrading this first subregion, this second subregion black plug; When upgrading this second subregion, the 3rd subregion black plug; When upgrading the 3rd subregion, this first subregion black plug.
4. driving method as claimed in claim 2 is characterized in that: described second subregion is between described first subregion and the 3rd subregion.
5. driving method as claimed in claim 2 is characterized in that: described first color data is R, G or B.
6. LCD, comprise a liquid crystal panel, a drive unit and a backlight module, this drive unit is in order to drive this liquid crystal panel, and this drive unit upgrades one of stored second drawing frame data in one of stored first picture frame data of one first picture frame buffer and the one second picture frame buffer more successively, the described first picture frame data and second drawing frame data include R, G, three kinds of color data of B, described backlight module, backlight in order to provide one to this liquid crystal panel, it is characterized in that:
Described drive unit is more in order to carry out the following step:
Step 1, set a color DISPLAY ORDER, this color DISPLAY ORDER is a kind of among RGBG, RGRB or the RBGB three;
Step 2, alternately read this first picture frame data and this second drawing frame data according to a picture frame cycle, this picture frame cycle comprises during three sub-picture frames;
Step 3, in a cycle period, according to the color DISPLAY ORDER that sets and the described first picture frame data or second drawing frame data that are read, show four color data successively, wherein this cycle period comprises during four sub-picture frames, show during each subgraph frame those color data one of them;
Wherein, described backlight module is then divided into one first subregion, one second subregion and one the 3rd subregion according to the one scan direction of described drive unit, and in during the first subgraph frame in described cycle period, according to pairing one first color data during this first subgraph frame, upgrade this first subregion, second subregion and the shown coloured light of the 3rd subregion successively, wherein when upgrading this first subregion, this second subregion black plug; When upgrading this second subregion, the 3rd subregion black plug; When upgrading the 3rd subregion, this first subregion black plug.
7. LCD as claimed in claim 6 is characterized in that: described second subregion is between described first subregion and the 3rd subregion.
8. LCD as claimed in claim 6 is characterized in that: first color data is R, G or B.
9. drive unit that is applied to a LCD is characterized in that: comprising:
One line buffer is in order to keep in a plurality of scan-line datas that an image processor is exported;
One picture frame buffer is electrically connected at this line buffer, reads those number of scanning lines via this line buffer and upgrades a drawing frame data that is stored in this picture frame buffer according to this, and this drawing frame data comprises R, G, three kinds of color data of B; And
Time schedule controller is electrically connected at this line buffer and this picture frame buffer, in order to reading this drawing frame data in this picture frame buffer, and in order to control the sequential that this picture frame buffer upgrades this drawing frame data;
The performed step of described time schedule controller comprises:
Set a color DISPLAY ORDER, this color DISPLAY ORDER is RGBG, RGRB or RBGB;
In a cycle period, according to this color DISPLAY ORDER and this drawing frame data of being read, show four color data successively, wherein this cycle period comprises during four sub-picture frames, show during each subgraph frame those color data one of them; And
During the one first subgraph frame in this cycle period, scan a plurality of sweep trace picture elements in the liquid crystal panel successively according to the drawing frame data in this picture frame buffer;
Wherein, when upgrading stored drawing frame data with described scan-line data as yet as if described picture frame buffer, described time schedule controller is then according to the sweep trace picture element in this this liquid crystal panel of drawing frame data continuation scanning.
10. a LCD comprises a liquid crystal panel, a drive unit and a backlight module, and described drive unit is in order to driving this liquid crystal panel, and described backlight module is in order to provide one backlight to this liquid crystal panel, and it is characterized in that: this drive unit also comprises:
One line buffer is in order to keep in a plurality of scan-line datas that an image processor is exported;
One picture frame buffer is electrically connected at this line buffer, reads those number of scanning lines via this line buffer and upgrades a drawing frame data that is stored in this picture frame buffer according to this, and this drawing frame data comprises R, G, three kinds of color data of B; And
Time schedule controller is electrically connected at this line buffer and this picture frame buffer, in order to reading this drawing frame data in this picture frame buffer, and in order to control the sequential that this picture frame buffer upgrades this drawing frame data;
Wherein, this time schedule controller is in order to carry out the following step:
Set a color DISPLAY ORDER, this color DISPLAY ORDER is RGBG, RGRB or RBGB;
In a cycle period, according to this color DISPLAY ORDER and the drawing frame data that read, show four color data successively, wherein this cycle period comprises during four sub-picture frames, show during each subgraph frame those color data one of them; And
During the one first subgraph frame in this cycle period, scan a plurality of sweep trace picture elements in the liquid crystal panel successively according to the drawing frame data in this picture frame buffer; When wherein upgrading stored drawing frame data with described scan-line data as yet as if described picture frame buffer, described time schedule controller is then according to the sweep trace picture element in this this liquid crystal panel of drawing frame data continuation scanning;
Described backlight module is also divided into one first subregion, one second subregion and one the 3rd subregion according to the one scan direction of described time schedule controller, and in during the first subgraph frame in this cycle period, according to pairing one first color data during this first subgraph frame, upgrade this first subregion, one second subregion and the shown coloured light of one the 3rd subregion successively, wherein when upgrading this first subregion, this second subregion black plug; When upgrading this second subregion, the 3rd subregion black plug; When upgrading the 3rd subregion, this first subregion black plug.
11. LCD as claimed in claim 10 is characterized in that: described second subregion is between described first subregion and the 3rd subregion.
12. LCD as claimed in claim 10 is characterized in that: described first color data is R, G or B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101116273A CN101572065A (en) | 2009-04-27 | 2009-04-27 | Driving device and method and liquid crystal display (LCD) using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101116273A CN101572065A (en) | 2009-04-27 | 2009-04-27 | Driving device and method and liquid crystal display (LCD) using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101572065A true CN101572065A (en) | 2009-11-04 |
Family
ID=41231404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101116273A Pending CN101572065A (en) | 2009-04-27 | 2009-04-27 | Driving device and method and liquid crystal display (LCD) using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101572065A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109841190A (en) * | 2017-11-24 | 2019-06-04 | 三星显示有限公司 | Oganic light-emitting display device and its driving method |
-
2009
- 2009-04-27 CN CNA2009101116273A patent/CN101572065A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109841190A (en) * | 2017-11-24 | 2019-06-04 | 三星显示有限公司 | Oganic light-emitting display device and its driving method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104751757B (en) | Display device capable of driving at low speed | |
| CN101046941B (en) | Apparatus and method for driving liquid crystal display device | |
| US8368624B2 (en) | Display method with interlacing reversal scan and device thereof | |
| US8471802B2 (en) | Liquid crystal display | |
| US20070268231A1 (en) | Liquid crystal display and method for driving the same | |
| CN101276533B (en) | Hold type image display system | |
| CN101017637B (en) | Display device | |
| CN104751810B (en) | Liquid Crystal Display And Method For Driving | |
| JP2014153531A (en) | Display device | |
| US8847864B2 (en) | Color flat display panel and corresponding color flat display device having gamma reference voltages for red, green and blue colors | |
| WO2019015073A1 (en) | Driving method and driving device for display panel | |
| CN102486911A (en) | Organic light emitting diode display and method for driving same | |
| CN100483198C (en) | Liquid crystal display device and driving method thereof | |
| US8867115B2 (en) | Control of array of two-dimensional imaging elements in light modulating displays | |
| CN102087826B (en) | Drive method of field-sequential flat-panel display | |
| CN106228939A (en) | LCD TV driving method, device and LCD TV drive circuit board | |
| US7679590B2 (en) | Field sequential LCD driving method | |
| CN101295480A (en) | Alternation contra-rotation scanning type indication method and device | |
| CN101107647A (en) | Color-sequential display device | |
| US8054287B2 (en) | Driving apparatus, driving method and liquid crystal display using the same | |
| CN101572065A (en) | Driving device and method and liquid crystal display (LCD) using same | |
| CN101587696B (en) | Response time compensation device of color sequential display | |
| US20070290978A1 (en) | Timing controller for controlling pixel level multiplexing display panel | |
| CN101281741B (en) | Apparatus and method for displaying dynamic menu | |
| CN116802723A (en) | Display panel driving method, display driving circuit and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20091104 |