CN201984263U - Pixel unit, array substrate and liquid crystal display device - Google Patents
Pixel unit, array substrate and liquid crystal display device Download PDFInfo
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- CN201984263U CN201984263U CN 201120104795 CN201120104795U CN201984263U CN 201984263 U CN201984263 U CN 201984263U CN 201120104795 CN201120104795 CN 201120104795 CN 201120104795 U CN201120104795 U CN 201120104795U CN 201984263 U CN201984263 U CN 201984263U
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Abstract
The utility model discloses a liquid crystal display device and a pixel unit thereof, which are used for reducing color difference with different view and improving liquid crystal display image quality. The liquid crystal display device comprises an array substrate for controlling rotation of a liquid crystal molecule, a color light filter substrate and a liquid crystal layer positioned between the array substrate and the color light filter substrate, wherein the pixel unit in the array substrate comprises a pixel electrode and a public electrode; the pixel electrode is in a block shape, the middle part is seamless, and the public electrode is in a rectangular paper clip shape, or a similar ellipse paper clip shape, or an ellipse paper clip shape; or the pixel electrode is in a rectangular paper clip shape, or a similar ellipse paper clip shape, or an ellipse paper clip shape; or the pixel electrode and the public electrode are both in rectangular paper clip shapes, or ellipse-like paper clip shapes, or ellipse paper clip shapes.
Description
Technical field
The utility model relates to electronic technology field, particularly relates to pixel cell, array base palte and liquid crystal display device.
Background technology
Lcd technology has become the mainstream technology of present demonstration, wherein tft liquid crystal shows that (Thin Film Transistor Liquid Crystal Display, TFT-LCD) product has characteristics such as volume is little, low in energy consumption, radiationless, display resolution height and popularized and become main product by a large amount of.
Senior super dimension field switch (Advanced-Super Dimensional Switching; Be called for short: AD-SDS) technology is one of technology that can change the LCD image quality that occurs recent years, parallel electric field and pixel electrode layer and longitudinal electric field formation hyperspace compound field that it is produced by same plane interior pixel electrode edge to producing between electrode layer, make between liquid crystal cell interior pixel electrode, all aligned liquid-crystal molecules of directly over the electrode and liquid crystal cell top can both produce the rotation conversion, thereby to have improved planar orientation be the liquid crystal work efficiency and increased light transmission efficiency, can possess traditional twisted-nematic (Twist Nematic-LCD, TN-LCD) the unexistent wide viewing angle of type.
The single sub-pix unit of the AD-SDS mode liquid crystal display device of prior art as shown in Figure 1 at present, on array base palte (a kind of glass substrate), gate electrode bus 101, data line bus (or claiming the source electrode bus) 102 and drain electrode 103 confluces form thin film transistor (TFT) (TFT) device.Pixel electrode 104 is covered with the zone between gate electrode bus 101 and the data line bus 102 substantially, and general and gate electrode bus 101 and data line bus 102 are separated by a distance, pixel electrode 104 not with gate electrode bus 101 and 102 conductings of data line bus.Fig. 1 is the synoptic diagram of single sub-pix unit, gate electrode bus 101 and the data line bus 102 relevant with this sub-pix shown in the figure.For whole glass substrate, gate electrode bus 101 and data line bus 102 all can be around single sub-pixs.Public electrode 105 is covered with whole pixel region substantially, has many regular Horizons capable of the slit of data line 102 in public electrode 105.Pixel electrode 104 and public electrode 105 constitute by transparent conductive material, and are positioned on the same glass substrate.Pixel electrode 104 forms prior to public electrode 105 in the technological process, uses transparent insulation material to isolate in the middle of pixel electrode 104 and the public electrode 105.During work, pixel electrode 104 is by TFT device and data line bus 102 mutual conduction.Gate electrode bus 101 control data line buses 102 are to the electron transfer between the drain electrode 103 (conducting is to pixel electrode 104).Electric potential difference between pixel electrode 104 and the public electrode 105 (current potential is 0) drives the liquid crystal molecule rotation, thereby the variation by different electric potential difference control liquid crystal cell transmitances forms different GTGs, final realization demonstration.
In the driving process, when uncharged, the Liquid Crystal Molecules Alignment in the liquid crystal cell is shown among Fig. 1 106, and after the charging, the Liquid Crystal Molecules Alignment in the liquid crystal cell is shown among Fig. 2 107, and the liquid crystal molecule in the liquid crystal cell all is along same direction rotation.Liquid crystal rotates the front and back state as shown in Figure 3, and dotted line is represented the preceding state of liquid crystal rotation, state after the rotation of shadow representation liquid crystal.Because the anisotropic of liquid crystal molecule refractive index, also difference to some extent of observed show state under the different visual angles, visual effect is exactly that the color that shows under the different visual angles is different intuitively, i.e. " aberration ", as being white attitude from top view among Fig. 3, observe the color paleness from the liquid crystal long axis direction, observe its colour changed into yellow from the liquid crystal short-axis direction, from non-positive view to color be not needed white, therefore this aberration problem needs to be resolved hurrily.
The utility model content
The utility model embodiment provides a kind of pixel cell, array base palte and switching liquid crystal display, is used to reduce the aberration under the different visual angles, improves the liquid crystal display image quality.
A kind of pixel cell includes: pixel electrode and public electrode;
Be shaped as oval back-shaped needle-like of the back-shaped needle-like of rectangle, class or oval back-shaped needle-like between public electrode; Perhaps
Pixel electrode be shaped as oval back-shaped needle-like of the back-shaped needle-like of rectangle, class or oval back-shaped needle-like; Perhaps
The shape of public electrode and pixel electrode is the back-shaped needle-like of rectangle, the oval back-shaped needle-like of class or oval back-shaped needle-like.
Pixel electrode and public electrode constitute by transparent conductive material.
Transparent conductive material is one or more in indium oxide, tin oxide, the tin indium oxide.
When public electrode be shaped as oval back-shaped needle-like of the back-shaped needle-like of rectangle, class or oval back-shaped needle-like the time, the width range of public electrode is 2～10 μ m, has the slit between public electrode, the width range in slit is 3～20 μ m; Perhaps
When the shape of pixel electrode was the back-shaped needle-like of rectangle, the oval back-shaped needle-like of class or oval back-shaped needle-like, the width range of pixel electrode was 2～10 μ m, has the slit in the same pixel electrode, and the width range in slit is 3～20 μ m.
A kind of array base palte comprises aforesaid pixel cell.
A kind of liquid crystal display device comprises aforesaid array base palte, is positioned at the colored filter substrate of array base palte one side, and the liquid crystal layer between array base palte and colored filter substrate.
Liquid crystal molecule in the liquid crystal layer is positivity liquid crystal or negative liquid crystal.
The rubbing angle of array base palte and colored filter substrate is the unspecified angle in 30～150 degree, and the frictional direction antiparallel of array base palte and colored filter substrate.
Described liquid crystal display device also comprises the polaroid that is positioned at the array base palte back side and is positioned at the colored filter substrate back side; The extinction direction of principal axis of the polaroid of array base palte side is parallel or vertical with the frictional direction of array base palte, and vertical with the extinction axle of the polaroid of colored filter substrate side.
The utility model embodiment is by changing the shape of public electrode and pixel electrode, makes that after charging the direction of an electric field of each point is incomplete same in the pixel.Pixel electrode is block, is shaped as the back-shaped needle-like of rectangle, the oval back-shaped needle-like of class or oval back-shaped needle-like between public electrode; Perhaps, pixel electrode is shaped as oval back-shaped needle-like of the back-shaped needle-like of rectangle, class or oval back-shaped needle-like; Perhaps, the shape of public electrode and pixel electrode is the back-shaped needle-like of rectangle, the oval back-shaped needle-like of class or oval back-shaped needle-like.Thereby make the sense of rotation of liquid crystal molecule incomplete same, and make the sense of rotation of liquid crystal molecule various as far as possible, the aberration under the different visual angles that can cause liquid crystal molecule refractive index anisotropy carries out self-compensating like this, and then improves the liquid crystal display image quality.
Description of drawings
Fig. 1 is the synoptic diagram of single sub-pix unit in the prior art;
Fig. 2 is the synoptic diagram of single sub-pix unit, charging back in the prior art;
Fig. 3 is the synoptic diagram of liquid crystal rotation front and back state in the prior art;
Fig. 4 is the cross section structure synoptic diagram of liquid crystal display device among the utility model embodiment;
Fig. 5 be among the utility model embodiment before the charging at the synoptic diagram of the single sub-pix unit of the back-shaped needle-like public electrode of rectangle;
Fig. 6 is the synoptic diagram of back at the single sub-pix unit of the back-shaped needle-like public electrode of rectangle that charge among the utility model embodiment;
Fig. 7 is first synoptic diagram of liquid crystal rotation front and back state among the utility model embodiment;
Fig. 8 be among the utility model embodiment before the charging at the synoptic diagram of the single sub-pix unit of the oval back-shaped needle-like public electrode of class;
Fig. 9 is the synoptic diagram of back at the single sub-pix unit of the oval back-shaped needle-like public electrode of class that charge among the utility model embodiment;
Figure 10 is second synoptic diagram of liquid crystal rotation front and back state among the utility model embodiment;
Figure 11 be among the utility model embodiment before the charging at the synoptic diagram of the single sub-pix unit of the back-shaped needle-like public electrode of ellipse;
Figure 12 is the synoptic diagram of back at the single sub-pix unit of the back-shaped needle-like public electrode of ellipse that charge among the utility model embodiment.
Embodiment
The utility model embodiment is by changing the shape of pixel electrode and public electrode, makes that after charging the direction of an electric field of each point is incomplete same in the pixel.Pixel electrode is block, and public electrode is the back-shaped needle-like of rectangle, the oval back-shaped needle-like of class or oval back-shaped needle-like; Perhaps, pixel electrode is shaped as oval back-shaped needle-like of the back-shaped needle-like of rectangle, class or oval back-shaped needle-like; Perhaps, the shape of public electrode and pixel electrode is the back-shaped needle-like of rectangle, the oval back-shaped needle-like of class or oval back-shaped needle-like.Thereby make the sense of rotation of liquid crystal molecule incomplete same, and make the sense of rotation of liquid crystal molecule various as far as possible, the aberration under the different visual angles that can cause liquid crystal molecule refractive index anisotropy carries out self-compensating like this, and then improves the liquid crystal display image quality.
Referring to Fig. 4, liquid crystal display device comprises in the present embodiment: the array base palte 401 that is used for control liquid crystal molecule rotation after charging, colored filter substrate (or claiming color membrane substrates) 402, the liquid crystal layer 403 between array base palte 401 and colored filter substrate 402.Array base palte 401, colored filter substrate 402 and liquid crystal layer 403 common formation liquid crystal cells.Liquid crystal in the liquid crystal layer 403 can be positivity liquid crystal or negative liquid crystal.Rubbing angle between array base palte 401 and the colored filter substrate 402 is the unspecified angle in 30～150 degree.And the frictional direction antiparallel of array base palte and colored filter substrate.
Isolate by insulating material between pixel electrode 104 and the public electrode 105.Preferable, pixel electrode 104 and public electrode 105 constitute by transparent conductive material.Transparent conductive material comprises one or more in indium oxide, tin oxide, the tin indium oxide.Any transparent conductive material all is applicable to present embodiment.
Liquid crystal display device also comprises: polaroid 404 and polaroid 405.Polaroid 404 and polaroid 405 are positioned at the both sides of liquid crystal cell, and polaroid 404 is covered on array base palte 401 back sides, and polaroid 405 is positioned at colored filter substrate 402 back sides.Wherein, in the present embodiment colored filter substrate 402 and array base palte 401 relative one sides are called the front.Preferable, the extinction axle (or seeing through axle) of extinction axle of polaroid 404 (or seeing through axle) and polaroid 405 is vertical.The absorption axes direction of polaroid 404 is parallel or vertical with the frictional direction of array base palte 401.
The main improvement of present embodiment is the shape that changes public electrode 105 or pixel electrode 104, perhaps changes the shape of pixel electrode 104 and public electrode 105, makes the direction of an electric field on effective viewing area difference after the charging incomplete same.When only changing the shape of public electrode 105, preferable when just public electrode 105 adopts the shape that present embodiments provide, pixel electrode 104 be shaped as bulk, 104 of pixel electrodes are seamless.The shape of pixel electrode 104 and public electrode 105 mainly is designed to the back-shaped needle-like of rectangle, the oval back-shaped needle-like of class or oval back-shaped needle-like or the like.Any can make charging back effectively the incomplete same public electrode shape of direction of an electric field on the difference of viewing area all be applicable to present embodiment.From the complexity of production technology, the aberration of optics and visual angle, aspects such as transmitance consider that three kinds of effects that shape reached of the public electrode that present embodiment provides are preferable.The public electrode 105 in different sub-pixs district can adopt identical or different shape.Be that example describes with public electrode 105 below.
Embodiment 1, and public electrode 105 is the back-shaped needle-like of rectangle, referring to shown in Figure 5.With a sub-pix is example, and when uncharged, the major axis of all liquid crystal molecules all is parallel to the frictional direction of array base palte 401, rule be arranged in liquid crystal cell inside.Because liquid crystal molecule does not rotate, the polarized light that sees through polaroid 404 does not change through polarization direction after the liquid crystal layer, and polaroid 405 see through the direction of principal axis that sees through that direction of principal axis is perpendicular to polaroid 404, make polarized light can't see through polaroid 405 again, liquid crystal cell is shown as black.After the charging, gate electrode bus 101 control data line buses 102 are to the electron transfer between the drain electrode 103 (conducting is to pixel electrode 104), and the electric potential difference between pixel electrode 104 and the public electrode 105 (current potential is 0) drives the liquid crystal molecule rotation.As shown in Figure 6, the direction of an electric field of each liquid crystal molecule present position is not quite identical, electric field as liquid crystal molecule 1061 and 1062 present positions is vertical mutually, originally the liquid crystal molecule 1061 that was parallel to frictional direction rotates respectively along different separately directions of an electric field with 1062, and the rotation back is shown in liquid crystal molecule 1071 and liquid crystal molecule 1072.The polarized light that sees through polaroid 404 changes through polarization direction after the liquid crystal layer, partly sees through polaroid 405.Under the different driving voltages, liquid crystal cell can present different transmitances, demonstrates different GTGs.Referring to shown in Figure 7, because it is vertical to be near the liquid crystal molecule long axis direction after rotation of horizontal public electrode and vertical public electrode, just the aberration under the different visual angles that can cause liquid crystal molecule refractive index anisotropy carries out certain self-compensating, reduced aberration, increased the visual angle, the demonstration image quality of pixel is greatly improved.
Embodiment 2, public electrode 105 is the oval back-shaped needle-like of class, referring to shown in Figure 8, the oval back-shaped needle-like of class exists straight line and camber line, and present embodiment is in order to improve optical property, part public electrode shape is done camber, the residing direction of an electric field of each point is inconsistent near making arc-shaped electrode, near the direction of the liquid crystal molecule rotation the charging rear arc electrode is inconsistent like this, strengthened the self-compensating effect of the aberration under the different visual angles, image quality such as the visual angle of liquid crystal cell, color are greatly improved like this.With a sub-pix is example, and when uncharged, the major axis of all liquid crystal molecules all is parallel to the frictional direction of array base palte 401, rule be arranged in liquid crystal cell inside.Because liquid crystal molecule does not rotate, the polarized light that sees through polaroid 404 does not change through polarization direction after the liquid crystal layer, and polaroid 405 see through the see through direction of principal axis of direction of principal axis perpendicular to polaroid 404, make polarized light can't see through polaroid 405, liquid crystal cell is shown as black.After the charging, gate electrode bus 101 control data line buses 102 are to the electron transfer between the drain electrode 103 (conducting is to pixel electrode 104), and the electric potential difference between pixel electrode 104 and the public electrode 105 (current potential is 0) drives the liquid crystal molecule rotation.As shown in Figure 9, because the direction of an electric field of each liquid crystal molecule present position is not quite identical, direction of an electric field as liquid crystal molecule 1061,1062 and 1063 present positions is inconsistent, originally the liquid crystal molecule 1061,1062 that was parallel to frictional direction rotates respectively along different separately directions of an electric field with 1063, and the rotation back is shown in liquid crystal molecule 1071,1072 and 1073.The polarized light that sees through polaroid 404 changes through polarization direction after the liquid crystal layer, partly sees through polaroid 405.Under the different driving voltages, liquid crystal cell can present different transmitances, demonstrates different GTGs.Referring to shown in Figure 10, because near the liquid crystal molecule long axis direction after rotation that is in arc public electrode and the vertical lines public electrode is inconsistent, postrotational long axis of liquid crystal molecule direction also has nothing in common with each other near the arc public electrode, aberration under the different visual angles that can cause liquid crystal molecule refractive index anisotropy carries out better self-compensating, significantly reduced aberration, increased the visual angle, the demonstration image quality of pixel is greatly improved.
Embodiment 3, public electrode 105 is oval back-shaped needle-like, referring to shown in Figure 11, present embodiment is in order to improve optical property, most of public electrode shape is done camber, make near the residing direction of an electric field of each point of arc-shaped electrode inconsistent, near the direction of the liquid crystal molecule rotation the rear arc of charging the like this electrode is inconsistent, strengthened the self-compensating effect of the aberration under the different visual angles greatly, image quality such as the visual angle of liquid crystal cell, color are greatly improved like this.With a sub-pix is example, and when uncharged, the major axis of all liquid crystal molecules all is parallel to the frictional direction of array base palte 401, rule be arranged in liquid crystal cell inside.Because liquid crystal molecule does not rotate, the polarized light that sees through polaroid 404 does not change through polarization direction after the liquid crystal layer, and polaroid 405 see through the see through direction of principal axis of direction of principal axis perpendicular to polaroid 404, make polarized light can't see through polaroid 405, liquid crystal cell is shown as black.After the charging, gate electrode bus 101 control data line buses 102 are to the electron transfer between the drain electrode 103 (conducting is to pixel electrode 104), and the electric potential difference between pixel electrode 104 and the public electrode 105 (current potential is 0) drives the liquid crystal molecule rotation.As shown in figure 12, because the direction of an electric field of each liquid crystal molecule present position is not quite identical, direction of an electric field as liquid crystal molecule 1061,1062 and 1063 present positions is inconsistent, originally the liquid crystal molecule 1061,1062 that was parallel to frictional direction rotates respectively along different separately directions of an electric field with 1063, and the rotation back is shown in liquid crystal molecule 1071, liquid crystal molecule 1072 and liquid crystal molecule 1073.The polarized light that sees through polaroid 404 changes through polarization direction after the liquid crystal layer, partly sees through polaroid 405.Under the different driving voltages, liquid crystal cell can present different transmitances, demonstrates different GTGs.Referring to shown in Figure 10, because near the liquid crystal molecule long axis direction after rotation the arc public electrode is inconsistent, there is certain angle in postrotational liquid crystal molecule between long axis direction, aberration under the different visual angles that can cause liquid crystal molecule refractive index anisotropy carries out better self-compensating, significantly reduced aberration, increased the visual angle, the demonstration image quality of pixel is greatly improved.
The utility model embodiment is by changing the shape of pixel electrode and public electrode, makes that after charging the direction of an electric field of each point is incomplete same in the pixel.Pixel electrode is block, and public electrode is the back-shaped needle-like of rectangle, the oval back-shaped needle-like of class or oval back-shaped needle-like; Perhaps, pixel electrode is shaped as oval back-shaped needle-like of the back-shaped needle-like of rectangle, class or oval back-shaped needle-like; Perhaps, the shape of public electrode and pixel electrode is the back-shaped needle-like of rectangle, the oval back-shaped needle-like of class or oval back-shaped needle-like.Thereby make the sense of rotation of liquid crystal molecule incomplete same, and make the sense of rotation of liquid crystal molecule various as far as possible, the aberration under the different visual angles that can cause liquid crystal molecule refractive index anisotropy carries out self-compensating like this, and then improves the liquid crystal display image quality.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (10)
1. a pixel cell is characterized in that, includes: pixel electrode and public electrode;
Public electrode be shaped as oval back-shaped needle-like of the back-shaped needle-like of rectangle, class or oval back-shaped needle-like; Perhaps
Pixel electrode be shaped as oval back-shaped needle-like of the back-shaped needle-like of rectangle, class or oval back-shaped needle-like; Perhaps
The shape of public electrode and pixel electrode is the back-shaped needle-like of rectangle, the oval back-shaped needle-like of class or oval back-shaped needle-like.
2. pixel cell as claimed in claim 1 is characterized in that, pixel electrode and public electrode constitute by transparent conductive material.
3. pixel cell as claimed in claim 2 is characterized in that, transparent conductive material is one or more in indium oxide, tin oxide, the tin indium oxide.
4. pixel cell as claimed in claim 1, it is characterized in that, when public electrode be shaped as oval back-shaped needle-like of the back-shaped needle-like of rectangle, class or oval back-shaped needle-like the time, the width range of public electrode is 2～10 μ m, have the slit between public electrode, the width range in slit is 3～20 μ m; Perhaps
When the shape of pixel electrode was the back-shaped needle-like of rectangle, the oval back-shaped needle-like of class or oval back-shaped needle-like, the width range of pixel electrode was 2～10 μ m, has the slit in the same pixel electrode, and the width range in slit is 3～20 μ m.
5. pixel cell as claimed in claim 1 is characterized in that, pixel electrode is different with the shape of public electrode; Perhaps
Pixel electrode is identical with the shape of public electrode, and pixel electrode not exclusively overlaps with the projection of public electrode to surface level to the projection of surface level.
6. an array base palte is characterized in that, comprises each described pixel cell in a plurality of claims 1 to 4.
7. a liquid crystal display device is characterized in that, comprises the described array base palte of claim 6, is positioned at the colored filter substrate of array base palte one side, and the liquid crystal layer between array base palte and colored filter substrate.
8. liquid crystal display device as claimed in claim 7 is characterized in that, the liquid crystal molecule in the liquid crystal layer is positivity liquid crystal or negative liquid crystal.
9. liquid crystal display device as claimed in claim 7 is characterized in that, the rubbing angle of array base palte and colored filter substrate is the unspecified angle in 30～150 degree, and the frictional direction antiparallel of array base palte and colored filter substrate.
10. liquid crystal display device as claimed in claim 9 is characterized in that, also comprises the polaroid that is positioned at the array base palte back side and is positioned at the colored filter substrate back side; The extinction direction of principal axis of the polaroid of array base palte side is parallel or vertical with the frictional direction of array base palte, and vertical with the extinction axle of the polaroid of colored filter substrate side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120104795 CN201984263U (en) | 2011-04-11 | 2011-04-11 | Pixel unit, array substrate and liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201120104795 CN201984263U (en) | 2011-04-11 | 2011-04-11 | Pixel unit, array substrate and liquid crystal display device |
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| CN201984263U true CN201984263U (en) | 2011-09-21 |
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| CN 201120104795 Expired - Lifetime CN201984263U (en) | 2011-04-11 | 2011-04-11 | Pixel unit, array substrate and liquid crystal display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207494A (en) * | 2013-03-18 | 2013-07-17 | 京东方科技集团股份有限公司 | Electrochromic panel and display device |
| US9318040B1 (en) | 2014-11-10 | 2016-04-19 | Au Optronics Corp. | Display panel |
-
2011
- 2011-04-11 CN CN 201120104795 patent/CN201984263U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207494A (en) * | 2013-03-18 | 2013-07-17 | 京东方科技集团股份有限公司 | Electrochromic panel and display device |
| CN103207494B (en) * | 2013-03-18 | 2016-04-06 | 京东方科技集团股份有限公司 | A kind of electrochromic panel and display device |
| US9318040B1 (en) | 2014-11-10 | 2016-04-19 | Au Optronics Corp. | Display panel |
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Granted publication date: 20110921 |