CN101656051B - Method for controlling ion aggregating direction in liquid crystal display panel - Google Patents
Method for controlling ion aggregating direction in liquid crystal display panel Download PDFInfo
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- CN101656051B CN101656051B CN200810117994.XA CN200810117994A CN101656051B CN 101656051 B CN101656051 B CN 101656051B CN 200810117994 A CN200810117994 A CN 200810117994A CN 101656051 B CN101656051 B CN 101656051B
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Abstract
The invention relates to a method for controlling the ion aggregating direction in a liquid crystal display panel, which comprises the following steps: loading a display signal in the liquid crystal display panel; and forming a display area of the liquid crystal display panel by a marginal area and an effective display area, and loading a black display signal or a white display signal in the marginal area. The method applies the black display signal or the white display signal to the marginal area of the display area of the liquid crystal display panel when the liquid crystal display panel loads the display signal so that the marginal area is displayed with a black or white color, thereby making the ions in the liquid crystal display panel aggregated in the marginal area of the liquid crystal display panel, reducing the ion density of the effective display area, controlling the ion aggregating direction in the liquid crystal display panel, effectively improving afterimages, and providing a better display effect.
Description
Technical field
The present invention relates to field of liquid crystal display, especially a kind of method of controlling display panels intermediate ion gathering direction.
Background technology
Thin Film Transistor-LCD (TFT LCD) is widely used aspect much at TV and computer monitor etc. as a large main flow that shows market.Display panels is ingredient main in liquid crystal display, as shown in Figure 1, for the section of structure of display panels in prior art, by public electrode 11, pad (Bonding pad) 12, conducting resinl 13, sealed plastic box (sealant) 14, oriented layer 15, chock insulator matter 16, liquid crystal 17, formed.The liquid crystal display existence is trailed, the shortcomings such as reaction velocity is slow, image retention, and wherein, image retention has very important impact to the quality of liquid crystal display.Image retention refer to liquid crystal display long-time show a picture after, when Picture switch during to new picture, image that still can a residual upper display frame.As shown in Figure 2, be black and white chessboard picture view in prior art, the current display frame of liquid crystal display is black and white chessboard picture; As shown in Figure 3, be the gray scale picture view that gray-scale value in prior art is 127, the zone 1 of filling with point means the gray scale picture that gray-scale value is 127, Picture switch is to described gray scale picture; As shown in Figure 4, for actual displayed picture view in prior art, in the figure, mean with the zone 2 of filling than dense point the gray scale picture that gray-scale value is 192, the zone 3 of filling with more sparse point means the gray scale picture that gray-scale value is 64, as can be seen here, image that still can a residual upper black and white chessboard picture in the actual displayed picture.Because during the certain pattern of long time loading, in liquid crystal panel ion can along direction of an electric field up and down substrate move, be gathered in above alignment films and produce internal electric field, when more renewing figure, the ion that is gathered in oriented layer can't leave oriented layer at once, the remnant DC voltages existed makes liquid crystal display still keep original image, and, along with temperature raises, the image retention performance is more obvious.
Image retention can be produced and is summed up as two factors: in (1) liquid crystal panel, have foreign ion; (2) when DC Electric Field is arranged the ion convergent collection in liquid crystal panel to the oriented layer of upper and lower base plate, and the oriented layer that can not speed away when electric field is cancelled.First factor is main relevant with the material in liquid crystal panel, such as orientation liquid, liquid crystal, sealed plastic box, chock insulator matter, electrode etc.; Second factor mainly can improve by number of ways such as material, driving, Array Designs.
Image retention can greatly affect the quality of liquid crystal display, is also the research emphasis of each TFT LCD company.Mainly from four aspects, image retention is improved now: Pixel Design, array, Ce11 and driving.Reduce the concentration of display panels intermediate ion by the selection of raw material, and then to improve image retention be a kind of very important approach.But the ion concentration in available liquid crystal material and aligning film material is very low on the one hand, further reduces on this basis its concentration difficulty very large; Be the potpourri of a variety of liquid crystal on the other hand due to liquid crystal material, be difficult to the interaction of various compositions and oriented layer or sealed plastic box of interaction is wherein analyzed, so the difficulty of analyzing in theory is also very large.
In brief, from common research angle, improve image retention, larger in the technical elements difficulty.Need to develop to some extent from new direction and angle.
Summary of the invention
The present invention is directed to prior art and reduce the problem that display panels intermediate ion concentration difficulty is large, degree is limited, propose a kind of method that the display panels intermediate ion is assembled direction of controlling, control the direction that the display panels intermediate ion is assembled, effectively improve image retention.
The invention provides a kind of method that the display panels intermediate ion is assembled direction of controlling, comprising:
At display panels loaded and displayed signal;
The viewing area of described display panels is comprised of fringe region and effective display area territory, load black display signal or white displays signal at described fringe region, wherein, described black display signal or white displays signal are specially the ceiling voltage that data line is used in reality drives.
The present invention passes through at display panels loaded and displayed signal, fringe region in the viewing area of display panels applies black display signal or white displays signal, make described fringe region be shown as black or white, thereby make ion be gathered in the fringe region of display panels, effective display area territory ion concentration reduces, controlled the display panels intermediate ion and assembled direction, effectively improved image retention, the more display effect of high-quality is provided.
the accompanying drawing explanation
The section of structure that Fig. 1 is display panels in prior art;
Fig. 2 is black and white chessboard picture view in prior art;
Fig. 3 is the gray scale picture view that in prior art, gray-scale value is 127;
Fig. 4 is actual displayed picture view in prior art;
Fig. 5 is that the present invention controls embodiment of the method one process flow diagram that the display panels intermediate ion is assembled direction;
Fig. 6 is that the present invention controls the display panels intermediate ion and assembles display frame schematic diagram in the embodiment of the method one of direction;
Fig. 7 is that the present invention controls the display panels intermediate ion and assembles expectation display frame schematic diagram in the embodiment of the method one of direction;
Fig. 8 is that the present invention controls the display panels intermediate ion and assembles actual displayed picture view in the embodiment of the method one of direction;
Fig. 9 is that the present invention controls embodiment of the method two process flow diagrams that the display panels intermediate ion is assembled direction;
Figure 10 is that the present invention controls the display panels intermediate ion and assembles actual displayed picture view in the embodiment of the method two of direction;
Figure 11 is that the present invention controls embodiment of the method three process flow diagrams that the display panels intermediate ion is assembled direction;
Figure 12 is that the present invention controls the display panels intermediate ion and assembles actual displayed picture view in the embodiment of the method three of direction;
Figure 13 is that the present invention controls embodiment of the method four process flow diagrams that the display panels intermediate ion is assembled direction;
Figure 14 is that the present invention controls the display panels intermediate ion and assembles actual displayed picture view in the embodiment of the method four of direction.
Embodiment
Below in conjunction with drawings and Examples, the present invention is done further and describes in detail.
Research shows, in display panels, the reason of ionic transfer has two kinds:
(1) electric field action: when to the display panels added electric field, ion can move by the substrate to both sides along the inclination angle of liquid crystal, research according to a lot of documents, this moving direction is all important with parallel direction of an electric field at vertical electric field, namely ion moves to the orientation substrate of display panels on the one hand, simultaneously can be to moving up and down in liquid crystal panel.
(2) diffusion: in display panels, if the density of diverse location ion is variant, move to little place in the large place from concentration that ion can be very natural.
The degree and the display panels that by the research image retention, occur are executed alive mutual relationship, have a rule.Again referring to Fig. 2, white portion is different from black region institute making alive, for twisted-nematic (TwistedNematic, hereinafter to be referred as TN) mode liquid crystal display panel, when adopting normal white demonstration the, black region voltage Vb > white portion voltage Vw.The reason that image retention produces is the gathering of foreign ion and produce residual DC voltage, and relatively black region remnant DC voltages RDCb and white portion remnant DC voltages RDCw, find RDCb > RDCw.Be display panels when showing black and white chessboard picture shown in Fig. 2, voltage is larger, and regional final residue DC voltage is also larger, and residual direct current is larger just to be illustrated and have more ion to accumulate in the oriented layer of black region in the chessboard of black and white shown in Fig. 2 picture.
In display panels, the general temporal evolution of the concentration of foreign ion is little, can be considered as certain.If therefore in display panels, the ion gathering in a zone obviously will inevitably cause the reduction of other regional ion concentration, so the inventor adopts the present invention to control the method control display panels intermediate ion gathering direction that the display panels intermediate ion is assembled direction.
The present invention controls the embodiment of the method one that the display panels intermediate ion is assembled direction
As shown in Figure 5, for the present invention controls embodiment of the method one process flow diagram that the display panels intermediate ion is assembled direction, specifically can comprise the steps:
The viewing area of step 12, described display panels is comprised of fringe region and effective display area territory, at described fringe region, loads black display signal or white displays signal.
Wherein, step 12 is specifically as follows following steps:
As shown in Figure 6, for the present invention controls the display panels intermediate ion, assemble display frame schematic diagram in the embodiment of the method one of direction, the rectangle effective display area territory of viewing area is black and white chessboard picture, and the surrounding of viewing area is shown as dark border.As shown in Figure 7, for controlling the display panels intermediate ion, the present invention assembles expectation display frame schematic diagram in the embodiment of the method one of direction, by display frame by black and white chessboard Picture switch during to gray scale picture as shown in Figure 3, expectation obtains a gray scale display frame, wherein, the rectangle effective display area territory of viewing area is the gray scale picture, and the zone 4 of filling with point means the gray scale picture that gray-scale value is 127, and the surrounding of viewing area is shown as dark border, as shown in Figure 8, for controlling the display panels intermediate ion, the present invention assembles actual displayed picture view in the embodiment of the method one of direction, the rectangle effective display area territory of viewing area is the actual displayed picture after Picture switch, in the figure, mean with the zone 5 of filling than dense point the gray scale picture that gray-scale value is 220, the zone 6 of filling with more sparse point means the gray scale picture that gray-scale value is 35, the surrounding of viewing area is shown as dark border, with the picture of actual displayed shown in Fig. 4, compare, the display effect in rectangle effective display area territory is better, effectively improved image retention, because load the black display signal by the long-term surrounding to the display panels viewing area, make LCD intralamellar part ion concentrate on the surrounding of the viewing area of display panels, rectangle effective display area territory ion concentration reduces, be difficult for because the ion gathering produces image retention.
In the present embodiment, when display panels is deceived the liquid crystal panel of display mode for length, the signal that edge region applies is the white displays signal, and the surrounding of viewing area is shown as white, and described white displays signal is the ceiling voltage that data line is used in reality drives.
The present embodiment provides a kind of method that the display panels intermediate ion is assembled direction of controlling, by when the display panels loaded and displayed signal, surrounding in the viewing area of described display panels applies high voltage, make the surrounding of described viewing area be shown as black or white, thereby make the ion in display panels be gathered in the surrounding of the viewing area of display panels under described action of high voltage, rectangle effective display area territory density reduces, thereby controlled the display panels intermediate ion and assembled direction, effectively improved image retention, the more display effect of high-quality is provided.
The present invention controls the embodiment of the method two that the display panels intermediate ion is assembled direction
As shown in Figure 9, for the present invention controls embodiment of the method two process flow diagrams that the display panels intermediate ion is assembled direction, specifically can comprise the steps:
Step 113, at display panels loaded and displayed signal;
Step 114, on the display panels of normal white display mode, surrounding in viewing area loads the black display signal, make the surrounding of described viewing area be shown as black, the effective display area territory is oval, and described black display signal is the ceiling voltage that data line is used in reality drives.
As shown in figure 10, for controlling the display panels intermediate ion, the present invention assembles actual displayed picture view in the embodiment of the method two of direction, the oval effective display area territory of viewing area is the actual displayed picture, in the figure, mean with the zone 7 of filling than dense point the gray scale picture that gray-scale value is 235, the zone 8 of filling with more sparse point means the gray scale picture that gray-scale value is 20, the surrounding of viewing area is shown as dark border, with the picture of actual displayed shown in Fig. 4, compare, the display effect in oval effective display area territory is better, effectively improved image retention, because load high voltage by the long-term surrounding to the display panels viewing area, make LCD intralamellar part ion concentrate on the surrounding of the viewing area of display panels, oval effective display area territory ion concentration reduces, be difficult for producing image retention owing to producing the ion gathering.
In the present embodiment, when display panels is deceived the liquid crystal panel of display mode for length, the signal that edge region applies is the white displays signal, and the surrounding of viewing area is shown as white, and described white displays signal is the ceiling voltage that data line is used in reality drives; The effective display area territory can also be circle or irregular figure.
The present embodiment provides a kind of method that the display panels intermediate ion is assembled direction of controlling, by when the display panels loaded and displayed signal, surrounding in the viewing area of described display panels applies high voltage, make the surrounding of described viewing area be shown as black or white, thereby make the ion in display panels be gathered in the surrounding of the viewing area of display panels under described action of high voltage, effective display area territory density reduces, thereby controlled the display panels intermediate ion and assembled direction, effectively improved image retention, the more display effect of high-quality is provided.
The present invention controls the embodiment of the method three that the display panels intermediate ion is assembled direction
As shown in figure 11, for the present invention controls embodiment of the method three process flow diagrams that the display panels intermediate ion is assembled direction, specifically can comprise the steps:
As shown in figure 12, for controlling the display panels intermediate ion, the present invention assembles actual displayed picture view in the embodiment of the method three of direction, the rectangle effective display area territory of viewing area is the actual displayed picture, in the figure, mean with the zone 9 of filling than dense point the gray scale picture that gray-scale value is 210, the zone 10 of filling with more sparse point means the gray scale picture that gray-scale value is 45, two fringe regions up and down of viewing area are shown as the rectangle dark border, with the picture of actual displayed shown in Fig. 4, compare, the display effect in rectangle effective display area territory is better, effectively improved image retention, because two the rectangular edges zones up and down by the long-term viewing area to display panels load the black display signals, make LCD intralamellar part ion concentrate on two rectangular edges zones up and down of the viewing area of display panels, rectangle effective display area territory ion concentration reduces, be difficult for producing image retention owing to producing the ion gathering.
In the present embodiment, when display panels is deceived the liquid crystal panel of display mode for length, the signal that edge region applies is the white displays signal, and coboundary and the lower limb of viewing area are shown as white, and described white displays signal is the ceiling voltage that data line is used in reality drives; Described coboundary and lower limb can also be irregular figure.
The present embodiment provides a kind of method that the display panels intermediate ion is assembled direction of controlling, by when the display panels loaded and displayed signal, coboundary and lower limb in the viewing area of described display panels apply high voltage, make coboundary and the lower limb of viewing area be shown as black or white, thereby make ion in display panels be gathered in two rectangular edges zones up and down of the viewing area of display panels under described action of high voltage, effective display area territory density reduces, thereby controlled the display panels intermediate ion and assembled direction, effectively improved image retention, the more display effect of high-quality is provided.
The present invention controls the embodiment of the method four that the display panels intermediate ion is assembled direction
As shown in figure 13, for the present invention controls embodiment of the method four process flow diagrams that the display panels intermediate ion is assembled direction, specifically can comprise the steps:
Step 117, at display panels loaded and displayed signal;
As shown in figure 14, for controlling the display panels intermediate ion, the present invention assembles actual displayed picture view in the embodiment of the method four of direction, the rectangle effective display area territory of viewing area is the actual displayed picture, in the figure, mean with the zone 19 of filling than dense point the gray scale picture that gray-scale value is 210, the zone 20 of filling with more sparse point means the gray scale picture that gray-scale value is 45, two of the left and right of viewing area fringe region is shown as the rectangle dark border, with the picture of actual displayed shown in Fig. 4, compare, the display effect in rectangle effective display area territory is better, effectively improved image retention, because left hand edge and right hand edge zone by the long-term viewing area to display panels load high voltage, make LCD intralamellar part ion concentrate on the rectangular edges zone, two of left and right of the viewing area of display panels, rectangle effective display area territory ion concentration reduces, be difficult for producing image retention owing to producing the ion gathering.
In the present embodiment, when display panels is deceived the liquid crystal panel of display mode for length, the signal that edge region applies is the white displays signal, and left hand edge and the right hand edge of viewing area are shown as white, and described white displays signal is the ceiling voltage that data line is used in reality drives; Described left hand edge and right hand edge can also be irregular figure.
The present embodiment provides a kind of method that the display panels intermediate ion is assembled direction of controlling, by when the display panels loaded and displayed signal, rectangular edges zone, left and right in the viewing area of described display panels respectively applies high voltage, make left hand edge and the right hand edge of viewing area be shown as black or white, thereby make ion in display panels be gathered in the rectangular edges zone, two of left and right of the viewing area of display panels under described action of high voltage, effective display area territory density reduces, thereby controlled the display panels intermediate ion and assembled direction, effectively improved image retention, the more display effect of high-quality is provided.
It should be noted that, the fringe region of the viewing area of display panels is not limited to surrounding, coboundary and lower limb or left hand edge and the right hand edge of the viewing area that the embodiment of the present invention enumerates, can also in the Si Ge edge, upper and lower, left and right of viewing area any one, two or three edges.
Finally it should be noted that: above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (8)
1. control the method that the display panels intermediate ion is assembled direction for one kind, it is characterized in that comprising:
At display panels loaded and displayed signal;
The viewing area of described display panels is comprised of fringe region and effective display area territory, at described fringe region, loads the black display signal, makes described display panels when normal white display mode, and described fringe region shows black; Or, load the white displays signal at described fringe region, make described display panels when normal black display mode, described fringe region display white;
Wherein, described black display signal or described white displays signal are specially the ceiling voltage that data line is used in reality drives; The surrounding that described fringe region is described viewing area or in the Si Ge edge, upper and lower, left and right of described viewing area any one, two or three edges.
2. control display panels intermediate ion according to claim 1 is assembled the method for direction, it is characterized in that, described display panels comprises the display panels of normal white display mode and the display panels of Chang Hei display mode.
3. control display panels intermediate ion according to claim 1 and 2 is assembled the method for direction, it is characterized in that, described fringe region comprises the surrounding of described viewing area.
4. control display panels intermediate ion according to claim 3 is assembled the method for direction, it is characterized in that, described effective display area territory is specially rectangle, ellipse or circular or irregular figure.
5. control display panels intermediate ion according to claim 1 and 2 is assembled the method for direction, it is characterized in that, described fringe region comprises coboundary and the lower limb of described viewing area.
6. control display panels intermediate ion according to claim 5 is assembled the method for direction, it is characterized in that, described coboundary and lower limb are rectangle or irregular figure.
7. control display panels intermediate ion according to claim 1 and 2 is assembled the method for direction, it is characterized in that, described fringe region comprises left hand edge and the right hand edge of described viewing area.
8. control display panels intermediate ion according to claim 7 is assembled the method for direction, it is characterized in that, described left hand edge and right hand edge are rectangle or irregular figure.
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| CN200810117994.XA CN101656051B (en) | 2008-08-19 | 2008-08-19 | Method for controlling ion aggregating direction in liquid crystal display panel |
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| CN102411912A (en) | 2011-04-27 | 2012-04-11 | 深圳市华星光电技术有限公司 | Driving method for liquid crystal display |
| CN103439814B (en) * | 2013-09-04 | 2015-11-11 | 深圳市华星光电技术有限公司 | Liquid crystal indicator residual image improvement method and device |
| CN106896595A (en) | 2017-03-21 | 2017-06-27 | 京东方科技集团股份有限公司 | A kind of liquid crystal display panel, liquid crystal display device and its control method |
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| CN1648737A (en) * | 2003-12-12 | 2005-08-03 | 奇美电子股份有限公司 | Image display device |
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| CN1648737A (en) * | 2003-12-12 | 2005-08-03 | 奇美电子股份有限公司 | Image display device |
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| JP特开2004-226653A 2004.08.12 |
| JP特开2004-341465A 2004.12.02 |
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