CN100397214C - Transverse electric field liquid crystal display device - Google Patents
Transverse electric field liquid crystal display device Download PDFInfo
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- CN100397214C CN100397214C CNB2004100267061A CN200410026706A CN100397214C CN 100397214 C CN100397214 C CN 100397214C CN B2004100267061 A CNB2004100267061 A CN B2004100267061A CN 200410026706 A CN200410026706 A CN 200410026706A CN 100397214 C CN100397214 C CN 100397214C
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- electric field
- common electrode
- lcd
- transverse electric
- pixel
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Abstract
The present invention discloses a transverse electric field liquid crystal display device which comprises a first base plate, a second base plate, a liquid crystal layer, a grid line, a data line, a plurality of shared electrodes and pixel electrodes, wherein the first base plate and the second base plate are correspondingly arranged; the liquid crystal layer is formed between the first base plate and the second base plate; the grid line is formed on the first base plate, and the grid line laterally extends; the data line is formed on the first base plate, and the data line longitudinally extends; the shared electrodes and pixel electrodes are formed on the first base plate; a pixel district is formed from the grid line and the data line; the shared electrodes form a curvilinear shape; the shapes of the pixel electrodes and the shared electrodes are similar, and besides, the pixel electrodes and the shared electrodes are arranged in an interval mode; the shared electrodes at least comprises two curved parts, each curved part is provided with a first side and a second side which are intersected, wherein at least one side of one curved part is provided with sides of other curved parts in a slant mode.
Description
[technical field]
The invention relates to a kind of LCD, particularly about a kind of LCD with transverse electric field with wide viewing angle.
[background technology]
LCD with transverse electric field (In Plane Switching mode LCD, IPS LCD) is widely used in the monitor of desktop PC and notebook computer owing to have good display performance.LCD with transverse electric field is one of main flow wide viewing angle LCD technology, itself and common Twisted Nematic LCD (Twisted Nematic LCD, TN-LCD) difference is: the common electrode of IPS LCD and pixel electrode are arranged on the same glass substrate, it utilizes the transverse electric field that produces between common electrode and pixel electrode that liquid crystal molecule is rotated in same plane, has advantages such as wide viewing angle, high-luminous-efficiency and high-contrast.
Different according to the electrode arranging structure of common electrode and pixel electrode, LCD with transverse electric field can be divided into two types of single zone (Single Domain) and dual area (Two Domain).Fig. 1 is the electrode arranging structure vertical view of the single regional LCD with transverse electric field of prior art.One pixel region of this LCD with transverse electric field comprises gate line 11, a data line 12 that vertically is provided with, a thin film transistor (TFT) TFT (Thin FilmTransistor) 16 and a plurality of common electrode 141 and pixel electrode 151 of a horizontally set.This common electrode 141 is vertical bar shaped band electrode and parallel interval setting with pixel electrode 151.Be parallel to the substrate electric field of (figure does not show) when when common electrode 141 and 151 of pixel electrodes apply a voltage, producing one, be parallel in the plane of substrate one at liquid crystal molecule under this effect of electric field and rotate.Because this common electrode 141 all is the band electrode of vertical bar shaped with pixel electrode 151, so this electric field is uniform electric field, it is consistent that its intensity and direction are, and the liquid crystal molecule in each pixel only rotates towards single direction.So when when different direction is observed, can producing the phenomenon that color changes, promptly so-called colour cast (Color Shift), thus influence the display quality of LCD.
For solving the colour cast problem of the single regional LCD with transverse electric field of prior art, industry proposes another kind of electrode arranging structure.Fig. 2 is the electrode arranging structure vertical view of prior art dual area LCD with transverse electric field, common electrode 142 has a sweep (not indicating) respectively with pixel electrode 152, this bend is divided into "〉" shape, this common electrode 142 is with pixel electrode 152 spaces and be arranged in parallel.Please refer to Fig. 3, when 152 of common electrode 142 and pixel electrodes did not apply voltage, liquid crystal molecule was arranged along the inceptive direction shown in the arrow A; When common electrode 142 and 152 of pixel electrodes apply a voltage, produce two and be parallel to the substrate electric field E of (figure does not show)
10, E
20, this electric field E
10With electric field E
20The direction difference because liquid crystal molecule is the eurymeric liquid crystal, and the initial alignment direction of liquid crystal molecule is different with the electric field angulation, so liquid crystal molecule is at this two electric field E
10, E
20Effect under to the rotation of two opposite directions, wherein be positioned at electric field E
10In liquid crystal molecule clockwise direction rotation, be positioned at electric field E
20In liquid crystal molecule counterclockwise rotate.So common electrode 142 that should bending is divided into two different zones with the liquid crystal molecule of pixel electrode 152 and rotation in the opposite direction with a pixel, this two different zone has different viewing angle characteristics, so this dual area LCD with transverse electric field can be eliminated the colour cast problem of single regional LCD with transverse electric field, thereby improve the display quality of LCD.The dual area LCD with transverse electric field is the mainstream technology of present LCD TV (LCD TV).
But the visual angle up and down of this dual area LCD with transverse electric field is bigger, and the visual angle of other direction is less, causes the contrast difference of different visual angles.LCD TV requires the contrast at arbitrary visual angle all identical on using, and makes vision uniformity coefficient height.
[summary of the invention]
Less and the different problem of contrast different visual angles for the LCD with transverse electric field visual angle that overcomes prior art the invention provides the contrast identical LCD with transverse electric field of a kind of visual angle than big and different visual angles.
The technical scheme that technical solution problem of the present invention is adopted is: a kind of LCD with transverse electric field is provided, comprises that two first substrates that relatively are provided with and second substrate, are formed at data line and a plurality of common electrode and pixel electrode that is formed at first substrate that gate line, that liquid crystal layer, between first substrate and second substrate is formed at first substrate and horizontal expansion is formed at first substrate and longitudinal extension.This gate line and data line form a pixel region, this common electrode is crooked shape, and the space setting similar of the shape of this pixel electrode to the shape of common electrode, this common electrode comprises two sweeps at least, each sweep has two first side and the second sides of intersecting, and wherein a side of at least one sweep and the corresponding side of other sweeps are obliquely installed.
Compared to prior art, because the common electrode of LCD with transverse electric field of the present invention is with pixel electrode is arranged on the same substrate and the space arrangement, this common electrode and pixel electrode comprise two sweeps at least, each sweep has two first side and the second sides of intersecting, because a side and the corresponding side of other sweeps of at least one sweep are obliquely installed, so liquid crystal molecule rotates to three different directions under electric field action at least, so each pixel region is divided into three zones at least, each zone has different viewing angle characteristics, therefore can improve the visual angle of all directions and make the contrast at each visual angle identical, thereby improve display quality.
[description of drawings]
Fig. 1 is the floor map of a pixel region of prior art LCD with transverse electric field.
Fig. 2 is the floor map of a pixel region of another prior art LCD with transverse electric field.
Fig. 3 is the direction of an electric field synoptic diagram of the LCD with transverse electric field of Fig. 2.
Fig. 4 is the floor map of a pixel region of LCD with transverse electric field first embodiment of the present invention.
Fig. 5 is the diagrammatic cross-section of Fig. 4 along the V-V direction.
Fig. 6 is the direction of an electric field synoptic diagram of LCD with transverse electric field first embodiment of the present invention.
Fig. 7 is the floor map of a pixel region of LCD with transverse electric field second embodiment of the present invention.
Fig. 8 is the floor map of a pixel region of LCD with transverse electric field the 3rd embodiment of the present invention.
Fig. 9 is the sectional view of a pixel region of LCD with transverse electric field the 4th embodiment of the present invention.
[embodiment]
Please refer to Fig. 4 and Fig. 5, is the floor map and the sectional view of LCD with transverse electric field first embodiment one pixel region of the present invention.LCD with transverse electric field of the present invention comprises one first substrate 27, one second substrate 37 and is arranged at first substrate 27 and the liquid crystal layer 23 of 37 of second substrates that this liquid crystal layer 23 comprises that a plurality of dielectric coefficient anisotropies are the liquid crystal molecule of eurymeric.
The outside surface of this first substrate 27 is provided with a Polarizer 28, a plurality of common electrodes 24 are formed on first substrate 27, one insulation course 40 is covered on this common electrode 24, a plurality of pixel electrodes 25 are formed on this insulation course 40 with data line 22, one passivation layer 50 is covered on these a plurality of pixel electrodes 25 and the data line 22, and an alignment film 29 is formed on this passivation layer 50 and with liquid crystal layer 23 and contacts.The material of this insulation course 40 is silicon dioxide (SiO
2) or silicon nitride (SiN
x), the material of this passivation layer 50 is silicon dioxide (SiO
2) or silicon nitride (SiN
x).
The outside surface of this second substrate 37 is provided with a Polarizer 38, and inside surface sets gradually a colored filter 20 and an alignment film 39.
One gate line 21 is formed on first substrate 27 and horizontal expansion, and the data line 22 of a band shape is formed at first substrate 27 and the longitudinal extension.Orthogonal gate line 21 forms a pixel region with data line 22, and each pixel region comprises that at least one is positioned at the thin film transistor (TFT) 26 of gate line 21 and data line 22 infalls, and this thin film transistor (TFT) 26 comprises a grid 261, one source pole 262 and a drain electrode 263.Wherein this grid 261 links to each other with gate line 21, and source electrode 262 links to each other with data line 22, and drain electrode 263 links to each other with pixel electrode 25.This pixel region further comprises a common electrode bus 240 that links to each other with common electrode 24 and a pixel electrode bus 250 that links to each other with pixel electrode 25.This common electrode bus 240 and gate line 21 are parallel and be formed at on one deck.This pixel electrode bus 250 is parallel with gate line 21, be formed on the common electrode bus 240 and cover part common electrode bus 240, pixel electrode bus 250 is formed at on one deck with data line 22, forms a memory capacitance (not indicating) between the partial common electrode bus 240 of pixel electrode bus 250 and its covering.
These a plurality of common electrodes 24 are made up of a plurality of first sweep 241, second sweep 242 and the 3rd sweeps 243 that link to each other continuously, extend along the longitudinal direction from common electrode bus 240.These a plurality of pixel electrodes 25 have and common electrode 24 similar shapes, extend longitudinally from pixel electrode bus 250.These a plurality of common electrodes 24 equidistantly are staggered and are parallel to each other with pixel electrode 25, and the two is made by transparent conductive material, as tin indium oxide (Indium Tin Oxide, ITO) or indium zinc oxide (Indium Zinc Oxidc, IZO).
Please be simultaneously with reference to Fig. 6, first sweep 241, second sweep 242 and the 3rd sweep 243 of this common electrode 24 comprises two first side 2411,2421,2431 and the second sides 2412,2422,2432 of intersecting respectively. First side 2411,2421,2431 forms a bending angle (not indicating) respectively with second side 2412,2422,2432 respectively.The first side 2411,2421,2431 of each sweep 241,242,243 and second side 2412,2422,2432 identical length etc.This first side 2411,2421,2431 inclines towards each other to be provided with and is not parallel to each other, and second side 2412,2422,2432 also inclines towards each other to be provided with and is not parallel to each other.When common electrode 24 and 25 nothings of pixel electrode apply voltage, liquid crystal molecule is arranged at the inceptive direction B shown in the arrow of the effect lower edge of alignment film 29,39, and the initial arrangement direction B of liquid crystal molecule has six different angles (not indicating) with the side of the sweep of common electrode 24; When common electrode 24 and 25 of pixel electrodes apply certain voltage, produce the transverse electric field E that is parallel to substrate 27,37 between common electrode 24 and the pixel electrode 25
1, E
2, E
3, E
4, E
5, E
6This transverse electric field E
1, E
2, E
3, E
4, E
5, E
6The direction difference because liquid crystal molecule is the eurymeric liquid crystal, and the initial alignment direction B of liquid crystal molecule is different with the angle of electric field, so liquid crystal molecule is at electric field E
1, E
3, E
5Effect under clockwise direction rotation and arrange along three different directions; Liquid crystal molecule is at electric field E
2, E
4, E
6Down counterclockwise rotation and arrange of effect along three different directions.So the liquid crystal molecule of each pixel region is arranged along six different directions, each pixel region is divided into six zones, each zone has different viewing angle characteristics, thereby can improve the visual angle of all directions and make the contrast at each visual angle identical, thereby improves display quality.
In the present embodiment, data line 22 also can be huge dentation, comprises three sweeps, and is corresponding with the sweep 241,242,243 of common electrode 24 respectively.
Please refer to Fig. 7, is the floor map of LCD with transverse electric field second embodiment one pixel region of the present invention.This common electrode 34 comprises first sweep 341, second sweep 342 and the 3rd sweep 343 of continuous distribution.The first side 3411,3421,3431 of each sweep 341,342,343 equates respectively with second side 3412,3422,3432 length, and the length of first sweep, 341 sides is greater than the second curved length by part 342 sides, and the length of second sweep, 342 sides is greater than the length of the 3rd sweep 343 sides. First side 3411,3421,3431 is set parallel to each other, and second side 3412,3422 be arranged in parallel, and second side 3432 is obliquely installed with second side 3412,3422.Pixel electrode 35 is with common electrode 34 equidistant intervals and be arranged in parallel.When common electrode 34 and 35 of pixel electrodes do not apply voltage, the initial arrangement direction of liquid crystal molecule (not indicating) forms three different angles (not indicating) with each side of common electrode 34, when common electrode 34 and 35 of pixel electrodes apply certain voltage, produce three electric fields (not indicating) that direction is different between two electrodes, three in the effect of electric field lower edge different directions of the liquid crystal molecule of one pixel region are arranged, so every pixel region is divided into three zones, these three zones have different viewing angle characteristics, thereby can improve the visual angle of all directions and make the contrast at each visual angle identical, thereby improve display quality.
Please refer to Fig. 8, is the floor map of LCD with transverse electric field the 3rd embodiment one pixel region of the present invention.The length of common electrode 44 sweeps 441,441,443 sides extends longitudinally gradually from common electrode bus 240 and diminishes.Common electrode 44 is with pixel electrode 45 equidistant intervals and be arranged in parallel.
Please refer to Fig. 9, is the sectional view of LCD with transverse electric field the 4th embodiment one pixel region of the present invention.Itself and first embodiment, second embodiment and the 3rd embodiment are roughly the same, and difference is that common electrode 54 and pixel electrode 55 are to be formed at on one deck.
Among the present invention,, a pixel segmentation can be become 3～6 zones by adjusting the position relation of each side of common electrode sweep.The quantity of common electrode and pixel electrode is not limited in embodiment of the present invention and describes in one pixel region, can vary in size according to the spacing of common electrode and pixel electrode and curved portions angle to change.The quantity of common electrode sweep also can change with the length of sweep side, the size of bending angle and the size of pixel region.Each sweep of common electrode also can be discontinuously arranged, and interconnect by a conductor respectively.
Claims (10)
1. LCD with transverse electric field, comprise two first substrate and second substrates that are provided with relatively, one is formed at the liquid crystal layer between first substrate and second substrate, one is formed at the gate line of first substrate and horizontal expansion, one is formed at data line and a plurality of common electrode and pixel electrode that is formed at first substrate of first substrate and longitudinal extension, this gate line and data line form a pixel region, this common electrode is crooked shape, and the space setting similar of the shape of this pixel electrode to the shape of common electrode, it is characterized in that: this common electrode comprises two sweeps at least, each sweep has two first side and the second sides of intersecting, and wherein a side of at least one sweep and the corresponding side of other sweeps are obliquely installed.
2. LCD with transverse electric field as claimed in claim 1 is characterized in that: the sweep of this common electrode is a continuous distribution.
3. LCD with transverse electric field as claimed in claim 1 is characterized in that: the sweep of this common electrode is to link to each other by a conductor.
4. LCD with transverse electric field as claimed in claim 1 is characterized in that: further comprise a common electrode bus that links to each other with common electrode, this common electrode bus and gate line be arranged in parallel.
5. LCD with transverse electric field as claimed in claim 1 is characterized in that: further comprise a pixel electrode bus that links to each other with pixel electrode, this pixel electrode bus and gate line be arranged in parallel.
6. LCD with transverse electric field as claimed in claim 1 is characterized in that: this common electrode and pixel electrode are to adopt transparent conductive material to make.
7. LCD with transverse electric field as claimed in claim 1 is characterized in that: this common electrode and pixel electrode are conducting metal.
8. LCD with transverse electric field as claimed in claim 1 is characterized in that: wherein this data line comprises a plurality of sweeps, and is corresponding with the sweep of common electrode respectively.
9. LCD with transverse electric field as claimed in claim 1 is characterized in that: this common electrode and pixel electrode are formed on the different layers.
10. LCD with transverse electric field as claimed in claim 1 is characterized in that: this common electrode and pixel electrode are formed at on one deck.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100267061A CN100397214C (en) | 2004-03-27 | 2004-03-27 | Transverse electric field liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100267061A CN100397214C (en) | 2004-03-27 | 2004-03-27 | Transverse electric field liquid crystal display device |
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| Publication Number | Publication Date |
|---|---|
| CN1673840A CN1673840A (en) | 2005-09-28 |
| CN100397214C true CN100397214C (en) | 2008-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100267061A Expired - Fee Related CN100397214C (en) | 2004-03-27 | 2004-03-27 | Transverse electric field liquid crystal display device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102520545A (en) * | 2012-01-05 | 2012-06-27 | 信利半导体有限公司 | Wide-angle liquid crystal display |
| WO2013102439A1 (en) * | 2012-01-05 | 2013-07-11 | 信利半导体有限公司 | Wide viewing angle liquid crystal display realizing multi-domain display |
| WO2014100918A1 (en) * | 2012-12-28 | 2014-07-03 | 钰瀚科技股份有限公司 | Transverse electric field type liquid crystal display with inconstant distance between two electrodes |
| CN103943627B (en) * | 2013-07-30 | 2017-06-06 | 上海中航光电子有限公司 | A kind of tft array substrate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020036743A1 (en) * | 2000-08-07 | 2002-03-28 | Won-Gyun Youn | Liquid crystal display device with wide viewing angle |
| JP2002169183A (en) * | 2000-12-05 | 2002-06-14 | Matsushita Electric Ind Co Ltd | Liquid crystal display element and information processor provided therewith |
| TW594123B (en) * | 2001-08-29 | 2004-06-21 | Hitachi Ltd | Liquid crystal display apparatus using IPS display mode with high numerical aperture |
-
2004
- 2004-03-27 CN CNB2004100267061A patent/CN100397214C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020036743A1 (en) * | 2000-08-07 | 2002-03-28 | Won-Gyun Youn | Liquid crystal display device with wide viewing angle |
| JP2002169183A (en) * | 2000-12-05 | 2002-06-14 | Matsushita Electric Ind Co Ltd | Liquid crystal display element and information processor provided therewith |
| TW594123B (en) * | 2001-08-29 | 2004-06-21 | Hitachi Ltd | Liquid crystal display apparatus using IPS display mode with high numerical aperture |
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|---|---|
| CN1673840A (en) | 2005-09-28 |
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Granted publication date: 20080625 Termination date: 20180327 |