CN1673841A - In-plane change-over type liquid crystal display device - Google Patents
In-plane change-over type liquid crystal display device Download PDFInfo
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- CN1673841A CN1673841A CN 200410026708 CN200410026708A CN1673841A CN 1673841 A CN1673841 A CN 1673841A CN 200410026708 CN200410026708 CN 200410026708 CN 200410026708 A CN200410026708 A CN 200410026708A CN 1673841 A CN1673841 A CN 1673841A
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Abstract
The planar switching liquid crystal display device includes the first substrate, the second substrate, one liquid crystal layer, at least one regioselective layer, several grid lines and data lines, thin-film transistors, pixel electrodes and common electrode. The first substrate and the second substrate are set oppositely, the liquid crystal layer is located between the first substrate and the second substrate, the regioselective layer is located on the first substrate or the second substrate and has two regioselective directions, the grid lines and the data lines are on the first substrate, the thin-film transistors are located in the crosses between the grid lines and the data lines, and the common electrode and the pixel electrodes in similar shape are arranged alternately.
Description
[technical field]
The invention relates to a kind of liquid crystal indicator, particularly a kind of plane inner switching type liquid crystal displaying apparatus.
[background technology]
Liquid crystal indicator is a kind of in the flat display apparatus, and it not only increases in the application of notebook gradually through in decades development, is also occupying increasing share as fields such as monitors.
From simple matrix driving to active matrix drive, the demonstration contrast of liquid crystal indicator has tangible raising, liquid crystal reverses the narrower defective in visual angle that is caused in the prior art in order to overcome simultaneously, many companies all develop relevant wide viewing angle technology, (InPlane Switching, IPS) technology is exactly wherein have much advantage a kind of and in-plane changes.Its principle is: pixel electrode and public electrode constitute a plane electric fields, and liquid crystal molecule is rotated in the plane parallel with substrate to change the transmitance of light, can reach bigger observation visual angle.Its typical structure is that pectination pixel electrode and public electrode are parallel to each other and are staggered.
Seeing also Fig. 1, is a subpixel area structural representation of a kind of modified plane inner switching type liquid crystal displaying apparatus 1 of being disclosed for the 6th, 459, No. 465 of the United States Patent (USP) of on October 1st, 2002 bulletin.This subpixel area comprise data line 115, gate line 113, concentric line 135, thin film transistor (TFT) (Thin Film Transistor, TFT) 120, pixel electrode connecting line 1311, public electrode connecting line 1331, public electrode 133 and pixel electrode 131.This concentric line 135 is parallel with data line 115, this thin film transistor (TFT) 120 is arranged on the infall of data line 115 and gate line 113, the grid 121 of thin film transistor (TFT) 120, source electrode 123 are connected with gate line 113, data line 115 respectively, drain electrode 125 is connected with pixel electrode 131 by pixel electrode connecting line 1311, and public electrode 133 is connected with concentric line 135 by public electrode connecting line 1331.Pixel electrode 131 is to be parallel to each other and to be staggered with public electrode 133, and for common comb electrode, its improvements are: pixel electrode 131 is bending bar shapeds with public electrode 133, can produce a pair of territory electric field.
Seeing also Fig. 2, is the structure enlarged diagram in Fig. 1 II district.This pixel electrode 131 all is a broken line shape with this public electrode 133, and it produces a pair of territory electric field, and liquid crystal molecule 130 makes this pixel be divided into two zones on display effect along both direction deflection under this electric field action.The aberration that two zones cause can compensate mutually, therefore, when display is in bright attitude, when observing LCD from different perspectives, the situation that color changes with angle can be not clearly, but when display is in dark attitude, because pixel zone just on display effect, therefore can't color difference eliminating and the light leak of wide-angle, show thereby can not reach full visual angle.
Please consulting Fig. 3 together, is the contrast and the visual angle graph of a relation of prior art liquid crystal indicator 1.The contrast of broken line stripe shape electrode structure plane inner switching type liquid crystal displaying apparatus on the different directions visual angle of prior art differs bigger, the summation result in its pair territory is reaching contrast height on the left and right directions up and down, upwards contrast is lower on tiltedly and tiltedly, so its viewing angle characteristic is not good.
[summary of the invention]
Prior art midplane switching in image type LCD device visual angle is little in order to overcome, the problem of aberration and wide-angle light leak, the invention provides a kind of plane inner switching type liquid crystal displaying apparatus with preferable viewing angle characteristic of high display quality.
The scheme that technical solution problem of the present invention is adopted is: a kind of plane inner switching type liquid crystal displaying apparatus is provided, comprise first substrate, second substrate, one liquid crystal layer, at least one both alignment layers, a plurality of gate lines and data line, thin film transistor (TFT), pixel electrode and public electrode, this first substrate and second substrate are oppositely arranged, this liquid crystal layer is between this first substrate and second substrate, this at least one both alignment layers is positioned on first substrate or second substrate, these a plurality of gate lines and data line bit are in first substrate, this thin film transistor (TFT) is positioned at the infall of gate line and data line, this public electrode and pixel electrode have similar shape and are staggered, wherein, this at least one both alignment layers has first orientation and two alignment direction of second orientation.
Compared to prior art, the advantage of plane inner switching type liquid crystal displaying apparatus of the present invention is: because the plane inner switching type display generally is not in dark attitude during making alive, both alignment layers has two alignment direction simultaneously, make liquid crystal molecule along the both direction deploying, therefore when dark attitude, produce the multiple domain field, the synthetic result of multiple domain can eliminate the aberration of prior art and the light leak of wide-angle, and more excellent at the viewing angle characteristic of all directions.
[description of drawings]
Fig. 1 is the floor map of prior art plane inner switching type liquid crystal displaying apparatus one subpixel area.
Fig. 2 is the enlarged diagram in Fig. 1 II district.
Fig. 3 is prior art contrast of LCD degree and visual angle graph of a relation.
Fig. 4 is the floor map of plane inner switching type liquid crystal displaying apparatus first embodiment one subpixel area of the present invention.
Fig. 5 is the sectional view of Fig. 4 along VI-VI.
Fig. 6 is that electrode is arranged and the initial orientation synoptic diagram of liquid crystal molecule in plane inner switching type liquid crystal displaying apparatus first embodiment one subpixel area of the present invention.
Fig. 7 is a liquid crystal deflecting element synoptic diagram among Fig. 6.
Fig. 8 is the contrast and the visual angle graph of a relation of plane inner switching type liquid crystal displaying apparatus first embodiment of the present invention.
Fig. 9 is that electrode is arranged and the initial orientation synoptic diagram of liquid crystal molecule in the subpixel area of plane inner switching type liquid crystal displaying apparatus second embodiment of the present invention.
[embodiment]
Please consult Fig. 4 and Fig. 5 together, Fig. 4 is the planimetric map of plane inner switching type liquid crystal displaying apparatus first embodiment one subpixel area of the present invention.Thin film transistor (TFT) 220, concentric line 213, bonding pad 231 and connecting line 232, pixel electrode 233 and the public electrode 243 of gate line 211 and data line 212, this gate line 211 and data line 212 infalls be arranged in parallel respectively in first substrate 201.Gate line 211 is connected with the grid 221 of thin film transistor (TFT) 220 to transmit sweep signal, and this sweep signal is in order to the switch of control TFT 220; Data line 212 is connected with data signal with the source electrode 222 of thin film transistor (TFT) 220, and promptly source electrode 222 is in order to receive data-signal; The drain electrode 223 of thin film transistor (TFT) 220 is connected with connecting line 232 by bonding pad 231, and connecting line 232 is connected with pixel electrode 233, so the drain electrode 223 of pixel electrode 233 and thin film transistor (TFT) 220 constitutes electric connection.This public electrode 243 links to each other with concentric line 213 and has similar arc to pixel electrode 233, and it is parallel to each other and is staggered.
Fig. 5 is the sectional view of Fig. 4 along VI-VI.Plane inner switching type liquid crystal displaying apparatus of the present invention comprises first substrate 201, second substrate 202, liquid crystal layer 203, insulation course 262, passivation layer 261, public electrode 243, pixel electrode 233 and both alignment layers 204.This first substrate 201 and second substrate 202 are oppositely arranged, this liquid crystal layer 203 is arranged between first substrate 201 and second substrate 202, this insulation course 262 is arranged on this first substrate, 201 contiguous liquid crystal layer 203 1 sides, this passivation layer 261 is arranged on insulation course 262 contiguous liquid crystal layer one sides, this public electrode 243 is arranged on this insulation course 262 contiguous liquid crystal layer 203 1 sides, this pixel electrode 233 is arranged on this passivation layer 261 contiguous liquid crystal layer 203 1 sides, and this both alignment layers 204 1 is arranged on this passivation layer 261 contiguous liquid crystal layer 203 1 sides.This both alignment layers 204 is used to control the initial orientation of the liquid crystal molecule 2030 of liquid crystal layer 203, and the alignment direction of this both alignment layers 204 is two mutually perpendicular first directions and second direction.
Please consult Fig. 6 and Fig. 7 together, Fig. 6 is that electrode is arranged and the initial orientation synoptic diagram of liquid crystal molecule in plane inner switching type liquid crystal displaying apparatus first embodiment one subpixel area of the present invention.Do not have voltage to be added between pixel electrode 233 and the public electrode 243 this moment, liquid crystal molecule 2030 is arranged along the direction of both alignment layers, each subpixel area is divided into two mutually perpendicular zones, part liquid crystal molecule 2030 along continuous straight runs are arranged, the liquid crystal molecule 2030 of another part is arranged along vertical direction, the polaroid of this each regional liquid crystal molecule 2030 and display (figure does not show) thus combine and reach the bright dark state of control display, because the present invention is a plane inner switching type liquid crystal displaying apparatus, thereby display is in dark attitude at this moment, this dark attitude shows it is neither with regional liquid crystal molecule 2030 coefficient results, promptly form the multiple domain field, thereby to observe LCD in wide-angle be the phenomenon that aberration can not occur, simultaneously can reduce light leakage phenomena, so plane inner switching type liquid crystal displaying apparatus of the present invention has higher display quality.
Fig. 7 is a liquid crystal deflecting element synoptic diagram among Fig. 6.Liquid crystal molecule 2030 is arranged along direction of an electric field fully, apply voltage between pixel electrode 233 and the public electrode 243, this moment, the long axis direction of liquid crystal molecule 2030 was arranged along direction of an electric field, and LCD is in bright attitude, when voltage reaches certain value, display just is in bright state fully.Because pixel electrode 233 and public electrode 243 all are arcs, liquid crystal molecule 2030 rotates along different directions, therefore it forms the multiple domain field, and the transmittance of this pixel region is the summation of all liquid crystal molecule 2030 deflecting actions, a plurality of territories are synthetic jointly, make when observing LCD, can both know the image of seeing demonstration, thereby realize higher image display quality with different angle.
Seeing also Fig. 8, is the contrast and the visual angle graph of a relation of plane inner switching type liquid crystal displaying apparatus first embodiment of the present invention.Fig. 8 and above-mentioned Fig. 3 are capture figure but not drafting figure.When voltage puts on pixel electrode 233 and the public electrode 243, the deflection of the liquid crystal molecule 2030 in the liquid crystal layer 203 changes continuously, the mutually perpendicular a plurality of liquid crystal molecules of both direction in one pixel region are corresponding to the shape of electrode, a plurality of yawing moments are arranged, so its contrast is comparatively average on each visual angle.See also Fig. 3, reach the left and right directions height up and down compared to existing technology, the feature of four jiaos of stars that other direction is lower, the contrast of present embodiment is significantly improved on except other direction that reaches left and right directions up and down, and it remains better reaching left and right directions up and down, almost has the optical characteristics of circle symmetry.Because the observer may be at arbitrary visual angle of display device but not is only observed reaching on the left and right directions up and down, so this contrast viewing angle characteristic more meets the observation requirement.
See also Fig. 9, second embodiment of plane inner switching type liquid crystal displaying apparatus of the present invention adopts the pixel electrode 273 and public electrode 283 of bending shape, the orientation of liquid crystal molecule 2030 is divided into two parts, wherein a part of liquid crystal molecule 2030 is arranged along horizontal direction, another part liquid crystal molecule 2030 is arranged along the direction perpendicular to this first's liquid crystal molecule 2030, this structural liquid crystal display no matter is in dark attitude or bright attitude can both form the multiple domain field, its principle is identical with first embodiment, difference is pixel electrode 273 and public electrode 283 shapes and aforementioned different in the present embodiment, but can reach the effect of wide viewing angle and the high-quality demonstration of picture equally.
The public electrode of plane inner switching type liquid crystal displaying apparatus of the present invention and the shape of pixel electrode are not limited to bend shape or arc, other electrode shape that can form the continuous domain electric field parallel with substrate also can adopt, and also is suitable for as the straight line of smooth connection and the curve shape of curve formation.
Both alignment layers of the present invention can realize with friction directed method (Rubbing), light orientation method (Photo-Alignment) or ion beam orientation method (Ion Beam Alignment).
The concentric line of plane inner switching type liquid crystal displaying apparatus of the present invention, public electrode and pixel electrode can adopt transparent conductive material such as tin indium oxide (Indium Tin Oxide, ITO) etc.When adopting transparent material, can obtain high aperture opening ratio, thereby have higher brightness.
Corresponding each pixel region of the public electrode of plane inner switching type liquid crystal displaying apparatus of the present invention with pixel electrode, it can be arranged on the different base, and produces approximate parallel electric field, and promptly the fundamental component of this electric field is on the direction parallel with substrate; When being arranged on same substrate, can being present in therebetween just like separation layers such as passivation layers, and making two electrodes be positioned at different layers; Or public electrode and pixel electrode placed with one deck producing the more excellent electric field of collimation, pixel electrode was connected with drain electrode and can passes through as bonding pad of the present invention or alternate manner realization this moment.
Claims (7)
1. a plane inner switching type liquid crystal displaying apparatus comprises first substrate, second substrate, one liquid crystal layer, at least one both alignment layers, a plurality of gate lines and data line, thin film transistor (TFT), pixel electrode and public electrode, this first substrate and second substrate are oppositely arranged, this liquid crystal layer is between this first substrate and second substrate, this at least one both alignment layers is positioned on first substrate or second substrate, these a plurality of gate lines and data line bit are in first substrate, this thin film transistor (TFT) is positioned at the infall of gate line and data line, this public electrode and pixel electrode have similar shape and be staggered, and it is characterized in that: this at least one both alignment layers has first orientation and two alignment direction of second orientation.
2. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this public electrode and pixel electrode shape are arcs.
3. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this public electrode and pixel electrode shape are bending shapes.
4. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this public electrode and pixel electrode shape are smooth curve shapes.
5. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this public electrode and pixel electrode are positioned at different base.
6. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: this public electrode and pixel electrode are positioned at same substrate.
7. plane inner switching type liquid crystal displaying apparatus as claimed in claim 1 is characterized in that: first orientation of this both alignment layers and second orientation are orthogonal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026708 CN1673841A (en) | 2004-03-27 | 2004-03-27 | In-plane change-over type liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026708 CN1673841A (en) | 2004-03-27 | 2004-03-27 | In-plane change-over type liquid crystal display device |
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| CN1673841A true CN1673841A (en) | 2005-09-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103488002A (en) * | 2013-09-18 | 2014-01-01 | 京东方科技集团股份有限公司 | Pixel electrode, array substrate and display device |
| CN109557736A (en) * | 2018-12-13 | 2019-04-02 | 深圳市华星光电技术有限公司 | A kind of array substrate, display panel and display equipment |
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2004
- 2004-03-27 CN CN 200410026708 patent/CN1673841A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103488002A (en) * | 2013-09-18 | 2014-01-01 | 京东方科技集团股份有限公司 | Pixel electrode, array substrate and display device |
| US9442333B2 (en) | 2013-09-18 | 2016-09-13 | Boe Technology Group Co., Ltd | Pixel electrode, array substrate and display device |
| CN109557736A (en) * | 2018-12-13 | 2019-04-02 | 深圳市华星光电技术有限公司 | A kind of array substrate, display panel and display equipment |
| CN109557736B (en) * | 2018-12-13 | 2021-06-29 | Tcl华星光电技术有限公司 | Array substrate, display panel and display device |
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