CN101349839B - LCD device of multi-domain vertical orientation mode - Google Patents
LCD device of multi-domain vertical orientation mode Download PDFInfo
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- CN101349839B CN101349839B CN2008100425773A CN200810042577A CN101349839B CN 101349839 B CN101349839 B CN 101349839B CN 2008100425773 A CN2008100425773 A CN 2008100425773A CN 200810042577 A CN200810042577 A CN 200810042577A CN 101349839 B CN101349839 B CN 101349839B
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Abstract
The invention provides a liquid crystal display device of multidomain vertical orientation mode, comprising a first baseboard and a second baseboard opposite to each other, a liquid crystal layer stuffed between the first and the second baseboards, a plurality of pixel electrode rows on the first baseboard and a common electrode on the second baseboard, wherein the pixel electrode or the common electrode is formed with protrusions or seams, the pixel electrodes are in an isosceles trapezoid form, the protrusions or the seams are parallel with the waist edge of nearby pixel electrodes, the pixel electrodes in one row are arranged in one direction, the waist edges of two adjacent pixel electrodes in one line are laminated. The liquid crystal display device has matched forms of the pixel electrodes and the protrusions/seams, to reduce the black pattern area caused by edge field to improve the transmittance of the liquid crystal display device.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator, particularly relate to a kind of multi-domain vertical orientation mode (Multi-domain Vertical Alignment, liquid crystal indicator MVA/PVA).
Background technology
Along with the development of information society, people are to the demand dramatic growth of display device.In order to satisfy this demand, several flat panel display equipments commonly used recently, as liquid crystal indicator (LCD), plasma display device (PDP), the OLED display device has all obtained swift and violent development.In the middle of flat-panel display device, liquid crystal indicator is because its weight is low, volume is little, advantage of low energy consumption, is progressively replacing the cold cathode display device.
Liquid crystal indicator is mainly by first substrate 111 and second substrate 112, and is clipped in two liquid crystal molecules 114 between the substrate and forms, as Figure 1A.According to the difference on the liquid crystal molecular orientation, liquid crystal indicator can be divided into and reverse display mode (TN), in-plane switching display mode (IPS), vertical orientated display mode (VA) etc.For vertical orientated display mode, be formed with public electrode 113 in first substrate, 111 inboards, be formed with pixel electrode 122 in second substrate, 112 inboards, thereby can form vertical electric field; Embed negative liquid crystal between two-layer transparency conducting layer, the specific inductive capacity that so-called negative liquid crystal is meant long axis of liquid crystal molecule is less than perpendicular to the specific inductive capacity on the direction of long axis of liquid crystal molecule.Do not having vertical electric field to act under the situation on the liquid crystal molecule, liquid crystal molecule 114 is perpendicular to first substrate 111 and second substrate 112, shown in Figure 1A.When vertical electric field acts on the liquid crystal molecule, because the specific inductive capacity of liquid crystal molecule 114 major axis is less, so liquid crystal molecule 114 is under electric field action, the orientation of specific direction can take place, finally, just be parallel to orientation substrate and arrange, shown in Figure 1B perpendicular to electric field.Compare with the TN pattern, vertical alignment mode has the advantage at high-contrast, high visual angle, and switch (IPS) pattern is compared in the coplanar, and vertical alignment mode has high-contrast, the advantage of high aperture.In addition, owing in the middle of vertical alignment mode, used vertical alignment layer, on production technology, do not need to adopt friction.And in the production run of large size panel, friction tends to cause friction unequal bad, the yield in producing is brought very big influence, so vertical alignment mode is fit to be applied in the production of large size panel very much.
Certainly vertical alignment mode also has the weakness of oneself, it shows that mainly the aberration specific surface internal switch mode under the different visual angles is poor, in order to improve the viewing angle characteristic of vertical alignment mode, (Multi-Domain Vertical Alignment MVA) improves the viewing angle characteristic of vertical alignment mode to have mentioned the vertical orientated display mode that adopts multiple domain in European patent 0884626A2.In the MVA display mode, liquid crystal molecule is divided into 4 territories by ITO slit or protrusion of surface, when applying electric field, the sense of rotation of the liquid crystal molecule in the same area is all not inequality, like this when certain direction is observed, with respect to this direction of observation, the optical delay that the liquid crystal molecule in each territory causes is also just inequality, and each regional optical delay on average can obtain relatively better viewing angle characteristic each other.
The slit of above-mentioned vertical alignment mode or protrusion of surface are generally arranged along 45 degree directions, and its pixel electrode of existing pixel is rectangular-shaped, as shown in Figure 3, be formed with rectangular-shaped pixel electrode 122 at sweep trace 115 and data line 116 crossing places, so when projection that mixes into 45 degree color membrane substrates of directions or array base palte or slit, because the influence of fringing field effect, orientation at the position at some edge liquid crystal molecule is understood some disorder, thereby causes these zone appearance not wish the black line that exists.See also Fig. 2 A and 2B, the corner areas that intersects at projection 117 and data line 116, liquid crystal molecule 114 is because fringing field effect, and not exclusively be orientated according to ideal orientation, thereby produce these black lines 119, black line 119 is not only influential to response speed, and also very big for the influence of the transmitance of corresponding site.
At the problems referred to above, the solution that European patent 0884626A2 provides is to adopt the pixel that is the Zigzag style, by revising the shape of pixel, makes because the zone of the black line that fringing field causes reduces significantly.See also Fig. 4, be formed with Zigzag shape pixel electrode 122 at sweep trace 115 and data line 116 crossing places, sweep trace 115 correspondingly is a polyline shaped; Please continue referring to Fig. 5, be formed with Zigzag shape pixel electrode 122 at sweep trace 115 and data line 116 crossing places, data line 116 correspondingly is a polyline shaped.Above-mentioned two kinds of solutions must the arrange in pairs or groups sweep trace or the data line of polyline shaped, so that be complementary with Zigzag shape pixel electrode 122, not only make the manufacturing process complexity, and the sweep trace of polyline shaped or data line can increase signal delay, and then influence the brightness and contrast of liquid crystal display device.
Summary of the invention
Technical matters to be solved by this invention provides a kind of liquid crystal indicator of multi-domain vertical orientation mode, can either reduce the black line zone that fringing field causes, and improves transmitance, does not increase signal delay again.
For addressing the above problem, the invention provides a kind of liquid crystal indicator of multi-domain vertical orientation mode, comprising: first substrate that is oppositely arranged and second substrate; One liquid crystal layer is filled between first substrate and second substrate; Be formed with the pixel electrode that is into rectangular distribution on described first substrate; Be formed with common electrode on described second substrate; Be formed with projection or slit on described pixel electrode or the common electrode; Wherein, described pixel electrode shape is roughly isosceles trapezoid, and described projection or slit are substantially parallel with the waist limit of adjacent pixel electrodes, arranges by same direction with the pixel electrode of delegation, and the waist limit of two pixel electrodes that same row are adjacent roughly overlaps.
In the liquid crystal indicator of above-mentioned multi-domain vertical orientation mode, wherein, the base angle of described isosceles trapezoid is 45 degree.
The present invention contrasts prior art following beneficial effect: the liquid crystal indicator of multi-domain vertical orientation mode provided by the invention, because its pixel electrode shape and projection or slit are complementary, thereby reduce the black line zone that fringing field causes significantly, improved the liquid crystal indicator transmitance.The liquid crystal indicator of multi-domain vertical orientation mode provided by the invention only need change pixel electrode shape and arrangement, realizes simply, and can not increase signal delay.
Description of drawings
The liquid crystal molecular orientation synoptic diagram that Figure 1A is a LCD device in vertical orientation mode under powering state not.
Figure 1B is the liquid crystal molecular orientation synoptic diagram of LCD device in vertical orientation mode under powering state.
Fig. 2 A is that position view appears in the black line of pixel corner areas.
Fig. 2 B is the principle schematic that black line appears in the pixel corner areas.
Fig. 3 is existing dot structure synoptic diagram.
Fig. 4 is the dot structure synoptic diagram of existing collocation polyline shaped sweep trace.
Fig. 5 is the dot structure synoptic diagram of existing collocation polyline shaped data line.
Fig. 6 is a dot structure synoptic diagram of the present invention.
Fig. 7 is that two line of pixels of adjacent lines of the present invention list intention.
Among the figure:
112: the second substrates 113 of 111: the first substrates: public electrode
114: liquid crystal molecule 115: sweep trace 116: data line
117: projection 118: slit 119: black line
121: contact hole 122: pixel electrode 123: source, drain electrode
124: projection 125: slit
Embodiment
The invention will be further described below in conjunction with accompanying drawing and exemplary embodiments.
The liquid crystal indicator of multi-domain vertical orientation mode provided by the invention comprises first substrate and second substrate that are oppositely arranged; One liquid crystal layer is filled between first substrate and second substrate; Be formed with the pixel electrode that is into rectangular distribution on described first substrate; Be formed with common electrode on described second substrate; Be formed with projection or slit on described pixel electrode or the common electrode.The present invention improves dot structure wherein, by the change of pixel electrode shape, itself and described projection or slit is complementary, thereby reduces the black line zone that fringing field causes significantly, has improved the liquid crystal indicator transmitance.
Fig. 6 is a dot structure synoptic diagram of the present invention.
Please refer to Fig. 6, be formed with the pixel electrode 122 that vertically is placed to the isosceles trapezoid shape at sweep trace 115 and data line 116 crossing places, its base angle is roughly 45 degree.Pixel electrode 122 charges into data-signal by a thin film transistor switch (figure do not show) control, and the source of thin film transistor switch, drain electrode 123 are drawn with pixel electrode 122 by contact hole 121 and electrically contacted.For three primary colours colour mixture scheme, there is a direction in this non-standard rectangle, and the average length L 1 on this direction is 3 times of normal direction average length L 2 of this direction, perhaps is similar to 3 times, and for 4 primary colours schemes, it is approximately equal to 4 times.Certainly, in same delegation, in the perhaps same row, these non-standard rectangles are not to arrange according to same direction.
Fig. 7 is that two line of pixels of adjacent lines of the present invention list intention.
Please refer to Fig. 7, at sweep trace Gn and Gn+1, the place that data line Dm and Dm+1 intersect is formed with two pixel electrodes 122 that vertically are placed to the isosceles trapezoid shape, described two pixel electrodes 122 are two adjacent pixel electrodes of same row, its waist limit roughly overlaps, and promptly the last base of top pixel electrode and the bottom of following pixel electrode align, and the rest may be inferred, the pixel electrode of each row is arranged by same direction, and the waist limit of two pixel electrodes that same row are adjacent all roughly overlaps.Be formed with projection 124 or slit 125 on pixel electrode 122 or the common electrode, described projection 124 or slit 125 are substantially parallel with the waist limit of adjacent pixel electrodes 122.
The liquid crystal indicator of multi-domain vertical orientation mode provided by the invention, wherein data line is the same with existing dot structure, adopts the linearity configuration, so can not increase the signal delay of data line.If utilize sweep trace to make memory capacitance, sweep trace directly adopts the sweep trace of linearity, so signal delay also is the same with existing pixel; Make memory capacitance if utilize public electrode, then need the TFT structure of pixel is made some changes, please refer to Fig. 6, TFT in the dot structure of the present invention (figure does not show) has adopted the setting of two drain electrodes of a source electrode, wherein source electrode connects data line, draws two drain electrodes then and connect pixel electrode and public electrode respectively on device.Adopt this way, equally also can not increase the signal delay of sweep trace.
In sum, the liquid crystal indicator of multi-domain vertical orientation mode provided by the invention only need change pixel electrode shape and arrangement, and realizing simply can not increase the signal delay of data line or sweep trace.In addition, manufacture craft of the present invention and present manufacture craft are identical, do not increase extra manufacture craft.
At first be the making of sweep trace: at substrate sputtering deposit the first metal layer, through the photoresist coating, operations such as exposure, development, etching obtain sweep trace 115 at described the first metal layer.
Then on substrate, continue depositing insulating layer, form by a-Si and n+a Si respectively.Through the photoresist coating, operations such as exposure, development, etching are finished the making of semiconductor layer figure, and form channel region.
Then continue deposition second metal level on substrate, through the photoresist coating, operations such as exposure, development, etching obtain data line 116, source, drain electrode 123, and data line 116 links to each other with one of source, drain electrode 123.
Then on substrate, continue deposit passivation layer, and etch contact hole 121, naked another utmost point that drops out source, drain electrode 123 at specific position.
Sputter transparency conducting layer and carry out etching on substrate obtains pixel electrode 122 and slit 125 at last.Another of pixel electrode 122 and the source of drawing from contact hole 121, drain electrode 123 extremely links to each other.Pixel electrode 122 is roughly an isosceles trapezoid of vertically placing, and its base angle is about 45 degree, thereby makes a waist of slit 125 and pixel electrode 122 parallel.Last and corresponding color membrane substrates fits together, and finishes the making of product.
Aspect transmitance, use corresponding simulation softward, do not consider the absorption of color membrane substrates itself, adopt vertical alignment mode, driving voltage 6V, after display area normalization, the comparing result of dot structure of the present invention and existing dot structure is as follows:
| Dot structure of the present invention | Existing dot structure | |
| Transmitance | 27.9％ | 24.5％ |
By comparing result as can be seen, the liquid crystal indicator of multi-domain vertical orientation mode provided by the invention, because its pixel electrode shape and projection or slit are complementary, use dot structure of the present invention aspect transmitance with respect to common dot structure, can improve about 10%, thereby reduce the black line zone that fringing field causes significantly.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (2)
1. the liquid crystal indicator of a multi-domain vertical orientation mode comprises:
First substrate that is oppositely arranged and second substrate;
One liquid crystal layer is filled between first substrate and second substrate;
Be formed with the pixel electrode that is into rectangular distribution on described first substrate;
Be formed with common electrode on described second substrate;
Be formed with projection or slit on described pixel electrode or the common electrode;
It is characterized in that described pixel electrode shape is roughly isosceles trapezoid, described projection or slit are substantially parallel with the waist limit of adjacent pixel electrodes, arrange by same direction with the pixel electrode of delegation, and the waist limit of two pixel electrodes that same row are adjacent roughly overlaps.
2. the liquid crystal indicator of multi-domain vertical orientation mode according to claim 1 is characterized in that, the base angle of described isosceles trapezoid is 45 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100425773A CN101349839B (en) | 2008-09-05 | 2008-09-05 | LCD device of multi-domain vertical orientation mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100425773A CN101349839B (en) | 2008-09-05 | 2008-09-05 | LCD device of multi-domain vertical orientation mode |
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| Publication Number | Publication Date |
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| CN101349839A CN101349839A (en) | 2009-01-21 |
| CN101349839B true CN101349839B (en) | 2011-03-23 |
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| CN2008100425773A Expired - Fee Related CN101349839B (en) | 2008-09-05 | 2008-09-05 | LCD device of multi-domain vertical orientation mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102778792B (en) * | 2011-06-08 | 2015-01-07 | 京东方科技集团股份有限公司 | Array substrate and method for preparing the same as well as liquid crystal display |
| CN102393589B (en) * | 2011-11-29 | 2015-08-05 | 南京中电熊猫液晶显示科技有限公司 | Multi-domain vertical alignment type display panels and sub-pixel structure thereof |
| JP5881057B2 (en) * | 2011-11-30 | 2016-03-09 | Ｎｌｔテクノロジー株式会社 | Horizontal electric field type liquid crystal display device and manufacturing method thereof |
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Address after: 201108 Shanghai city Minhang District Huaning road 3306 Lane 160 Patentee after: INESA DISPLAY MATERIALS CO., LTD. Address before: 201108 Shanghai City Huaning road 3306 Lane 160 Patentee before: SAV Fushi Photoelectric Material Co., Ltd. |
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