CN202948232U - Pixel electrode structure, array substrate and liquid crystal display panel - Google Patents
Pixel electrode structure, array substrate and liquid crystal display panel Download PDFInfo
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- CN202948232U CN202948232U CN 201220696850 CN201220696850U CN202948232U CN 202948232 U CN202948232 U CN 202948232U CN 201220696850 CN201220696850 CN 201220696850 CN 201220696850 U CN201220696850 U CN 201220696850U CN 202948232 U CN202948232 U CN 202948232U
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Abstract
The utility model discloses a pixel electrode structure, an array substrate and a liquid crystal display panel which are used for reducing the color cast of liquid crystal display and improving the imaging quality. The pixel electrode structure comprises a plurality of pixel regions; each pixel region comprises a first domain display region, a second domain display region, a third domain display region and a fourth domain display region; a first included angle is formed between a strip-shaped pixel electrode in the first domain display region and a reference direction; a second included angle is formed between a strip-shaped pixel electrode in the second domain display region and the reference direction; a third included angle is formed between a strip-shaped pixel electrode in the third domain display region and the reference direction; a fourth included angle is formed between a strip-shaped pixel electrode in the fourth domain display region and the reference direction; the sum of the first included angle and the second included angle is 180 degrees; the sum of the third included angle and the fourth included angle is 180 degrees; and the first included angle, the second included angle, the third included angle and the fourth included angle are different. The array substrate comprises the pixel electrode structure. The liquid crystal display panel comprises the array substrate.
Description
Technical field
The utility model relates to technical field of liquid crystal display, relates in particular to a kind of pixel electrode structure, tft array substrate and display panels, in order to reduce the colour cast of liquid crystal display, improves image quality.
Background technology
Along with tft liquid crystal shows (TFT-LCD Display) development of technology and the progress of industrial technology, the liquid crystal display device production cost reduces, manufacturing process day by day perfect, LCD has been substituted the mainstream technology that cathode-ray tube display becomes daily demonstration field; Because itself has advantages of, become desirable display device in the heart the market and consumption person.Stereo display technique rises day by day in the market, so solve the technical disadvantages on stereo display technique, improves image quality (as reduce colour cast, reduce solid and crosstalk, film flicker increases visible angle etc.) and also becomes more and more important.
Senior super Wei Chang conversion lcd technology (Advanced Super Dimension Switch, ADS) has high permeability, and visible angle is large, easily reduces costs, and has become the mainstream technology in present high-grade, precision and advanced demonstration field.Referring to Fig. 1, be depicted as the concrete structure of a pixel region unit in the pixel electrode layer structure in the senior super dimension switch technology lcd technology in two farmlands, this pixel region is the pixel region that is surrounded by adjacent grid line and data line, and this pixel region comprises two viewing areas, farmland that area equates.This technology is widely used in high-end mobile phone screen, mobile application product, monitor, the fields such as television panels.But how further improvement is also the problem that faces at present to this technology, for example to how further reducing colour cast, increases angle of visibility etc.
The utility model content
The utility model embodiment provides a kind of pixel electrode structure, tft array substrate and display panels, in order to reduce the colour cast of liquid crystal display, improves image quality.
A kind of pixel electrode structure that the utility model embodiment provides comprises a plurality of pixel regions, and each pixel region comprises: the first viewing area, farmland, the second viewing area, farmland, the 3rd viewing area, farmland and the 4th viewing area, farmland; Strip pixel electrode in described the first viewing area, farmland and reference direction form the first angle, strip pixel electrode in described the second viewing area, farmland and reference direction form the second angle, strip pixel electrode in described the 3rd viewing area, farmland and reference direction form the 3rd angle, and the strip pixel electrode in described the 4th viewing area, farmland and reference direction form the 4th angle; Wherein the first angle and the second angle sum are 180 degree, and the 3rd angle and the 4th angle sum are 180 degree, and the first angle, the second angle, the 3rd angle and the 4th angle are unequal mutually.
A kind of array base palte that the utility model embodiment provides, this array base palte comprise above-mentioned pixel electrode layer structure.
A kind of display panels that the utility model embodiment provides comprises thin film transistor (TFT) tft array substrate, color membrane substrates and liquid crystal material, and described tft array substrate is above-mentioned array base palte.
The utility model provides a kind of drive above-mentioned array base palte method, comprising: the pixel electrode in described the first viewing area, farmland, the second viewing area, farmland, the 3rd viewing area, farmland and the 4th viewing area, farmland is controlled by the driving signal that same TFT receives.
The utility model embodiment by increasing the display pixel area on extra two farmlands, has reduced the demonstration colour cast on the basis of the senior super dimension switch technology liquid crystal display in two farmlands, improved the liquid crystal display quality.
Description of drawings
Fig. 1 is the pixel electrode layer structural representation of viewing area, two farmland in prior art;
A kind of pixel electrode layer structural representation that Fig. 2 (a) provides for the utility model embodiment;
The another kind of pixel electrode layer structural representation that Fig. 2 (b) provides for the utility model embodiment;
Another pixel electrode layer structural representation that Fig. 3 provides for the utility model embodiment;
Fig. 4 is respectively another pixel electrode layer structural representation that the utility model embodiment provides
Fig. 5 (a) is the rotation schematic diagram of 1D zone liquid crystal molecule in Fig. 2 (a);
Fig. 5 (b) is the rotation schematic diagram of 2D zone liquid crystal molecule in Fig. 2 (a);
Fig. 5 (c) is the rotation schematic diagram of 3D zone liquid crystal molecule in Fig. 2 (a);
Fig. 5 (d) is the rotation schematic diagram of 4D zone liquid crystal molecule in Fig. 2 (a);
Fig. 6 is that the angle of eye-observation display panels is resolved schematic diagram;
Fig. 7 is a kind of analog result schematic diagram of the optical property of the display panels of the pixel electrode layer structure in employing Fig. 1, Fig. 2 (a), Fig. 2 (b) and Fig. 3;
Fig. 8 be in Fig. 1, Fig. 2 (a), Fig. 2 (b) and Fig. 3 the pixel electrode layer structure the another kind of analog result schematic diagram of optical property of display panels.
Embodiment
The utility model embodiment provides a kind of pixel electrode structure, tft array substrate and display panels, in order to reduce the colour cast of liquid crystal display, improves image quality.
Below in conjunction with accompanying drawing, the utility model is described.
Referring to Fig. 2 (a), a kind of pixel electrode layer structure that the utility model embodiment provides comprises a plurality of pixel regions, and each pixel region comprises: the first viewing area, farmland 1D, the second viewing area, farmland 2D, the 3rd viewing area, farmland and the 4th viewing area, farmland 3D; Strip pixel electrode in described the first viewing area, farmland and reference direction form the first included angle A 1, strip pixel electrode in described the second viewing area, farmland and reference direction form the second included angle A 2, strip pixel electrode in described the 3rd viewing area, farmland and reference direction form the 3rd included angle A 3, and the strip pixel electrode in described the 4th viewing area, farmland and reference direction form the 4th included angle A 4; Wherein the first angle and the second angle sum are 180 degree, and the 3rd angle and the 4th angle sum are 180 degree, and the first angle, the second angle, the 3rd angle and the 4th angle are unequal mutually.Wherein, take level to the right as reference direction.
Preferably, described the first included angle A 1 is spent less than 180 less than or equal to 11 degree or more than or equal to 169 degree greater than 0 degree.
Preferably, described the 3rd included angle A 3 is spent less than 180 less than or equal to 11 degree or more than or equal to 169 degree greater than 0 degree.
In Fig. 2 (a), the first included angle A 1 is 169 degree, and the second included angle A 2 is 11 degree accordingly, and the 3rd included angle A 3 is 173 degree, and the 4th included angle A 4 is 7 degree; As shown in Fig. 2 (b), the first included angle A 1 is 169 degree, and the second included angle A 2 is 11 degree accordingly, and the 3rd included angle A 3 is 7 degree, and the 4th included angle A 4 is 173 degree; In Fig. 3, the first included angle A 1 is 169 degree, and the second included angle A 2 is 11 degree accordingly, and the 3rd included angle A 3 is 169 degree, and the 4th included angle A 4 is 11 degree.
Preferably, the absolute value of the difference of described the first included angle A 1 and described the 3rd included angle A 3 is greater than 0 degree and less than or equal to 6 degree, and perhaps described the first included angle A 1 is spent more than or equal to 174 and spends less than or equal to 186 with described the 3rd included angle A 3 sums.The advantage that herein limits is: the frictional direction of liquid crystal panel can once be completed, and need not rub respectively to zones of different respectively; The driving voltage of liquid crystal panel differs less, and when two angles differed greatly, its threshold voltage, saturation voltage differed greatly; Zones of different junction liquid crystal arrangement mode is similar, does not distinguish the generation of wrong line.
Preferably, described the first viewing area, farmland 1D, the second viewing area, farmland 2D, the 3rd viewing area, farmland 3D and the 4th viewing area, farmland 4D vertically are arranged in order in pixel region.
Preferably, the area of described the first viewing area, farmland 1D equates with the area of described the second viewing area, farmland 2D; The area of described the 3rd viewing area, farmland 3D equates with the area of described the 4th viewing area, farmland 4D.
Preferably, the ratio of the area of described the 3rd viewing area, farmland or the 4th viewing area, farmland and the area of described the first viewing area, farmland or the second viewing area, farmland is more than or equal to 1:5, and is less than or equal to 1:1.For example, in the pixel electrode layer structure shown in Fig. 2 (a) and Fig. 2 (b), the area of described the 3rd viewing area, farmland 3D or the 4th viewing area, farmland 4D is 1:2 with the ratio of the area of described the first viewing area, farmland 1D or the second viewing area, farmland 2D.Perhaps, as shown in Figure 4, the area of described the 3rd viewing area, farmland 3D or the 4th viewing area, farmland 4D is 1:3 with the ratio of the area of described the first viewing area, farmland 1D or the second viewing area, farmland 2D.
Below in conjunction with the drawings and specific embodiments, pixel electrode layer structure and principle of work that the utility model is provided are elaborated, and need to prove, the present embodiment is for the utility model is described, but does not limit the utility model.
As shown in Fig. 2 (a), the pixel electrode layer structure that the utility model embodiment provides comprises a plurality of pixel regions, and each pixel region comprises: the first viewing area, farmland 1D, the second viewing area, farmland 2D, the 3rd viewing area, farmland and the 4th viewing area, farmland 3D;
In the present embodiment, level direction to the right is reference direction.In Fig. 2 (a), the strip pixel electrode in described the first viewing area, farmland and reference direction form the first included angle A 1, and size is 169 degree; Strip pixel electrode in described the second viewing area, farmland and reference direction form the second included angle A 2, and size is 11 degree; Strip pixel electrode in described the 3rd viewing area, farmland and reference direction form the 3rd included angle A 3, and size is 173 degree, and the strip pixel electrode in described the 4th viewing area, farmland and reference direction form the 4th included angle A 4, and size is 7 degree; Wherein the first angle and the second angle sum are 180 degree, and the 3rd angle and the 4th angle sum are 180 degree, and in diagram, the first angle, the second angle, the 3rd angle and the 4th angle are unequal mutually.
Wherein, described the first viewing area, farmland 1D, the second viewing area, farmland 2D, the 3rd viewing area, farmland 3D and the 4th viewing area, farmland 4D vertically are arranged in order in pixel region; The area of described the first viewing area, farmland 1D equates with the area of described the second viewing area, farmland 2D; The area of described the 3rd viewing area, farmland 3D equates with the area of described the 4th viewing area, farmland 4D; The area of described the 3rd viewing area, farmland 3D or the 4th viewing area, farmland 4D is 1:2 with the ratio of the area of described the first viewing area, farmland 1D or the second viewing area, farmland 2D.
A kind of tft array substrate that the utility model provides comprises above-mentioned arbitrary pixel electrode structure that the utility model embodiment provides.
The manufacturing process of the array base palte at following the utility model provides pixel electrode structure place describes, and this manufacturing process comprises following each layer of preparation:
Grid: grid metal lines is used for loading grid voltage, to control the opening and closing of TFT device;
Common electrode layer: common electrode layer (ground floor ITO 1st common ITO) is used for loading common electrode signal, and forms memory capacitance with pixel electrode layer, drives liquid crystal and is rotated;
Passivation layer one: make between common electrode layer, grid and active layer and insulate, avoid short circuit;
Active layer: active layer carries out forming the TFT(thin film diode after channel etching) structure;
Data line: data line is used for loading the data-signal of each pixel;
Passivation layer two: make between data line and pixel electrode layer and insulate;
Smooth protective seam: one deck resin macromolecular material, reduce the array base palte surface section poor, make the transition of array base palte surface smoothing, this layer structure can be removed in some cases;
Pixel electrode layer: be used for the required GTG signal of loaded and displayed.Pixel electrode is four farmland pixel electrode layer structures herein, and is different from single domain, two farmland pixel electrode layer structures.
Filling liquid crystal material between the color membrane substrates that will comprise the array base palte of pixel electrodes layer structure and prepare to box, is namely prepared the display panels that comprises pixel electrodes layer structure.
In the driving process of above-mentioned display panels, the pixel electrode in the first viewing area, farmland of described pixel electrode layer, the second viewing area, farmland, the 3rd viewing area, farmland and the 4th viewing area, farmland is controlled by the driving signal that same TFT receives.Particularly, as shown in Fig. 5 (a)-Fig. 5 (d), principle of work is as follows:
The initial orientation of supposing all liquid crystal molecules is 0 °, namely arranges along reference direction.As L in Fig. 5 (a)
0The state of shown liquid crystal molecule, the twill of background represents electrode, the electrode direction in different zones is different, is used for producing the electric field line of different directions, makes liquid crystal molecule final along arranging on the direction perpendicular to this electrode.When all liquid crystal molecules being applied as shown in identical voltage, electric field (namely as 2(a in figure), by same thin film transistor (TFT) TFT, driving voltage is introduced pixel electrode, share the voltage of same public electrode due to them, the voltage that is applied on the liquid crystal molecule of same pixel region is all identical, consequent electric field line distribution is also identical), after the pressurization, the liquid crystal molecule anglec of rotation at 1D place is θ so, L as middle in Fig. 5 (a)
1D, the anglec of rotation of the liquid crystal molecule at 2D place is 180-θ, as L in Fig. 5 (b)
2DFor the liquid crystal molecule at 3D place, because the angle of the electrode at the angle of its electrode and horizontal direction and 1D, 2D place and horizontal direction is different, therefore the liquid crystal molecule anglec of rotation at the 3D place in working order is
As L in Fig. 5 (c)
3D, the anglec of rotation of the liquid crystal molecule at 4D place is
As L in Fig. 5 (d)
4DSimultaneously, because the pass between the angle of the strip pixel electrode direction of 1D/2D and 3D/4D and reference direction is, the absolute value of the difference of described the first angle and described the 3rd angle is greater than 0 degree and less than or equal to 6 degree, and perhaps described the first angle and described the 3rd angle sum are more than or equal to 174 degree and less than or equal to 186 degree.So, in working order under, the pass of the anglec of rotation of the liquid crystal molecule of 1D/2D and 3D/4D is:
Shown in the following list lattice of the anglec of rotation of the liquid crystal molecule of above-mentioned zones of different:
Table 1
Therefore when only having 1D/2D two zone, farmland, suppose the molecular state of liquid crystal in two farmland pixels such as the L in Fig. 5 (a), Fig. 5 (b)
1D, L
2DShown in, this moment, the retardation of liquid crystal (d Δ n) changed with the viewing angle of human eye is different in different directions, variable a, θ in d Δ n and figure, n
e, n
oRelevant, as shown in Figure 6.
Wherein, cell representative in figure: to the panel after box;
A represents: the angle of eyes and panel normal;
θ represents: the angle of liquid crystal molecule and panel normal;
n
eExpression: the refractive index of liquid crystal molecule to ordinary light;
n
oExpression: the refractive index of liquid crystal molecule to extraordinary ray;
When there being 1D/2D, when four of 3D/4D are regional, the L in each pixel in the state of liquid crystal molecule such as Fig. 5 (a), Fig. 5 (b), Fig. 5 (c), Fig. 5 (d)
31D, L
2D, L
3D, L
4DShown in.The optical delay amount of liquid crystal (d Δ n) will significantly reduce with the different scopes that change of the viewing angle of human eye in different directions this moment, can be so that retardation keeps relatively more approaching numerical value under all angles under some GTG; And then reach the purpose of eliminating colour cast.
Further, the optical property of the pixel structure of liquid crystal display panel that the utility model is provided is simulated demonstration, and analog result is described.Four kinds of pixel electrode layer structures are adopted in this simulated experiment, be respectively: four farmland pixel electrode layer structures shown in four farmland pixel electrode layer structures shown in the four farmland pixel electrode layer structures shown in Figure 3 that two farmland pixel electrode layer structures of prior art shown in Figure 1, the utility model provide, Fig. 2 (a) that the utility model provides, Fig. 2 (b) that the utility model provides, described with reference to following table 2.
Table 2
Model configuration such as Fig. 7, shown in Figure 8, wherein Fig. 7, Fig. 8 are respectively the eye-observation direction and normal (right-angle view direction) angle is respectively 60 °, the colour cast situation of the observation in the time of 30 °.Include the colour cast analog result of four kinds of pixel electrode layer structures in every part of figure, it represents that meaning is as shown in upper right corner legend in figure.Be that the simulation drawing of 60 ° can be found out from eye-observation direction and normal angle, four domain structures that Fig. 2 (b) is corresponding, the colour cast, particularly deflection that can obviously reduce different directions is the colour cast on the direction of 45° angle; Be that the simulation drawing of 30 ° can be found out from angle, four domain structures that Fig. 2 (b) is corresponding can obviously reduce the colour cast of different directions equally, through the area contrast to analog result, can find to improve successful simultaneously.
In sum, the utility model has increased by the three, the four viewing area, farmland on the basis of two farmland pixel regions of a senior super dimension switch technology (Advanced Super Dimension Switch, ADS).Direction by regulating strip pixel electrode in each viewing area and the angle of reference direction, and control four farmlands by a TFT and show and different liquid crystal deflection angles occurs, thereby improve colour cast, improve the visual angle.This scheme is improved colour cast in the situation that do not reduce transmitance, improves simultaneously the visual angle, finally improves the flat pannel display image quality.
Obviously, those skilled in the art can carry out various changes and modification and not break away from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model also is intended to comprise these changes and modification interior.
Claims (9)
1. a pixel electrode structure, comprise a plurality of pixel regions, it is characterized in that, each pixel region comprises: the first viewing area, farmland, the second viewing area, farmland, the 3rd viewing area, farmland and the 4th viewing area, farmland;
Strip pixel electrode in described the first viewing area, farmland and reference direction form the first angle, strip pixel electrode in described the second viewing area, farmland and reference direction form the second angle, strip pixel electrode in described the 3rd viewing area, farmland and reference direction form the 3rd angle, and the strip pixel electrode in described the 4th viewing area, farmland and reference direction form the 4th angle;
Wherein the first angle and the second angle sum are 180 degree, and the 3rd angle and the 4th angle sum are 180 degree, and the first angle, the second angle, the 3rd angle and the 4th angle are unequal mutually.
2. pixel electrode structure according to claim 1, is characterized in that, described the first angle is spent less than 180 less than or equal to 11 degree or more than or equal to 169 degree greater than 0 degree.
3. pixel electrode structure according to claim 1, is characterized in that, described the 3rd angle is spent less than 180 less than or equal to 11 degree or more than or equal to 169 degree greater than 0 degree.
4. according to claim 2 or 3 described pixel electrode structures, is characterized in that,
The absolute value of the difference of described the first angle and described the 3rd angle is greater than 0 degree and less than or equal to 6 degree, and perhaps described the first angle and described the 3rd angle sum are more than or equal to 174 degree and less than or equal to 186 degree.
5. pixel electrode structure according to claim 1, is characterized in that, described the first viewing area, farmland, the second viewing area, farmland, the 3rd viewing area, farmland and the 4th viewing area, farmland vertically are arranged in order in pixel region.
6. pixel electrode structure according to claim 5, is characterized in that, the area of described the first viewing area, farmland equates with the area of described the second viewing area, farmland; The area of described the 3rd viewing area, farmland equates with the area of described the 4th viewing area, farmland.
7. pixel electrode structure according to claim 6, it is characterized in that, the ratio of the area of described the 3rd viewing area, farmland or the 4th viewing area, farmland and the area of described the first viewing area, farmland or the second viewing area, farmland is more than or equal to 1:5, and is less than or equal to 1:1.
8. an array base palte, is characterized in that, this tft array substrate comprises the described pixel electrode layer structure of the arbitrary claim of claim 1 ~ 7.
9. a display panels, comprise tft array substrate, color membrane substrates and liquid crystal material, it is characterized in that, described tft array substrate is tft array substrate as claimed in claim 8.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998860A (en) * | 2012-12-14 | 2013-03-27 | 京东方科技集团股份有限公司 | Pixel electrode structure, array substrate, liquid crystal display panel and driving method |
| WO2019015295A1 (en) * | 2017-07-21 | 2019-01-24 | 京东方科技集团股份有限公司 | Pixel structure, array substrate, and liquid-crystal display device |
| CN109799656A (en) * | 2018-09-14 | 2019-05-24 | 京东方科技集团股份有限公司 | A kind of display base plate, display panel and display device |
-
2012
- 2012-12-14 CN CN 201220696850 patent/CN202948232U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998860A (en) * | 2012-12-14 | 2013-03-27 | 京东方科技集团股份有限公司 | Pixel electrode structure, array substrate, liquid crystal display panel and driving method |
| WO2019015295A1 (en) * | 2017-07-21 | 2019-01-24 | 京东方科技集团股份有限公司 | Pixel structure, array substrate, and liquid-crystal display device |
| CN109799656A (en) * | 2018-09-14 | 2019-05-24 | 京东方科技集团股份有限公司 | A kind of display base plate, display panel and display device |
| CN109799656B (en) * | 2018-09-14 | 2021-03-12 | 京东方科技集团股份有限公司 | Display substrate, display panel and display device |
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