CN101477281A - Polydomain vertical orientation LCD device - Google Patents
Polydomain vertical orientation LCD device Download PDFInfo
- Publication number
- CN101477281A CN101477281A CNA2009100454732A CN200910045473A CN101477281A CN 101477281 A CN101477281 A CN 101477281A CN A2009100454732 A CNA2009100454732 A CN A2009100454732A CN 200910045473 A CN200910045473 A CN 200910045473A CN 101477281 A CN101477281 A CN 101477281A
- Authority
- CN
- China
- Prior art keywords
- electrode
- substrate
- pixel electrode
- polydomain
- coupling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Liquid Crystal (AREA)
Abstract
The invention discloses a polydomain vertical orientation liquid crystal display device. The liquid crystal display device comprises a first substrate and a second substrate in relative arrangement; a pixel electrode and a slit are formed on the surface of the first substrate; the pixel electrode is divided into at least two unconnected parts in electricity by the silt; a coupling electrode is formed on the first substrate; and a common electrode and a raised object are formed on the surface of the second substrate, wherein the coupling electrode and the raised object correspond with each other. The polydomain vertical orientation liquid crystal display device can realize polydomain display through the coupling electrode and does not influence the opening rate.
Description
Technical field
The present invention relates to a kind of polydomain vertical orientation LCD device, relate in particular to a kind of polydomain vertical orientation LCD device with coupling electrode.
Background technology
(liquid crystal display is a kind of flat-panel screens that is widely used most at present LCD) to LCD, has low-power consumption, external form is thin, in light weight and feature such as low driving voltage.See also Fig. 1, generally speaking, first substrate (array base palte), 2, the second substrates (color membrane substrates) 3 that liquid crystal indicator is oppositely arranged and the control circuit board 4 that drive controlling is provided.Because liquid crystal itself is not luminous, so liquid crystal indicator generally also comprises backlight 1.
Thin Film Transistor-LCD develops towards directions such as high-contrast, no GTG counter-rotating, high brightness, high color saturation, quick response and wide viewing angles.Common wide viewing angle technology comprises at present: stable twisted nematic liquid crystal (TN) adds view film (wide viewing film), copline suitching type (In-plane Switching, IPS) LCD, a limit suitching type (Fringe Field Switching, FFS) LCD, and multidomain vertical orientation formula (Multi-domain Vertical Alignment, MVA) LCD.
For known MVA technology LCD,, make liquid crystal indicator can reach the wide viewing angle requirement because it makes the liquid crystal molecule in each pixel be multi-direction arrangement by the multizone alignment technique.Yet, in the VA technology,, made protrusion (Protrution) on the upper substrate of liquid crystal cell in order to produce oblique electric field and to make liquid crystal molecule produce tilt angle.Fig. 2 is that the sub-pixel of existing polydomain vertical orientation LCD device is cut apart synoptic diagram, Fig. 3 is existing multi-domain vertical alignment display panels sectional view, see also Fig. 2 and Fig. 3, the multi-domain vertical alignment display panels comprises first substrate 2, second substrate 3 that is oppositely arranged and is clipped in liquid crystal layer 7 between two substrates.Wherein, be formed with transparency electrode on first substrate 2, wherein, slit (slit) 9 is divided into different blocks with transparency electrode, makes transparency electrode become different pixel electrode 5.Be formed with public electrode 6 on second substrate 3, be formed with protrusion (protrution) 10 on the public electrode 6, it act as guiding liquid crystal molecule 8 orientations.When liquid crystal panel showed bright attitude picture, light was very low in the transmitance in protrusion zone, and when showing dark picture, the protrusion place easily produces light leak again, thereby has reduced contrast.
In order to improve above-mentioned colour cast problem, single pixel region can be divided into two different voltage regime, that is to say two pixel electrodes that are electrically insulated each other of single pixel use, make two pixel electrodes that are electrically insulated each other have different voltage by driving.Wherein, the coupling electrode method is a simple and feasible method, realize that the coupling between the zones of different need be used coupling electrode, if the lighttight coupling electrode of this increase does not design then can reduce aperture opening ratio.
Summary of the invention
Technical matters to be solved by this invention provides a kind of polydomain vertical orientation LCD device, can realize that multidomain shows by coupling electrode, and not influence aperture opening ratio.
The present invention solves the problems of the technologies described above the technical scheme that adopts to provide a kind of polydomain vertical orientation LCD device, comprise first substrate and second substrate that are oppositely arranged, the surface of described first substrate is formed with pixel electrode and slit, and described slit is divided into electric unconnected two parts at least of with pixel electrode; Also be formed with coupling electrode on described first substrate; The surface of described second substrate is formed with public electrode and protrusion; Wherein, described coupling electrode is corresponding with described protrusion.
Above-mentioned polydomain vertical orientation LCD device, wherein, described coupling electrode is a bit larger tham described protrusion.
Above-mentioned polydomain vertical orientation LCD device, wherein, described slit is divided into first pixel electrode and second pixel electrode with pixel electrode, described first pixel electrode and described second pixel electrode are respectively by the first film transistor and the control of second thin film transistor (TFT), the described the first film transistor and second thin film transistor (TFT), described the first film transistor has different raceway groove width/length ratio with second thin film transistor (TFT).
The present invention contrasts prior art following beneficial effect: polydomain vertical orientation LCD device provided by the invention, because coupling electrode is corresponding with the protrusion position, both realized by coupling electrode that multidomain shows, did not reduce the adverse effect of lighttight coupling electrode to aperture opening ratio again.In addition, when coupling electrode is a bit larger tham protrusion, can also prevent the light leakage phenomena at protrusion place, thereby improve contrast.
Description of drawings
Fig. 1 is an available liquid crystal display device structure synoptic diagram.
Fig. 2 is that the sub-pixel of existing polydomain vertical orientation LCD device is cut apart synoptic diagram.
Fig. 3 is existing multi-domain vertical alignment display panels sectional view.
Fig. 4 is the first board structure synoptic diagram of polydomain vertical orientation LCD device of the present invention.
Fig. 5 is a polydomain vertical orientation LCD device sectional view of the present invention.
Fig. 6 is liquid crystal indicator pixel equivalent circuit figure.
Among the figure:
1 backlight, 2 first substrates, 3 second substrates
4 control circuit boards, 5 pixel electrodes, 6 public electrodes
7 liquid crystal layers, 8 liquid crystal molecules, 9 slits
10 protrusions, 11 gate lines, 12 data lines
13 storage electrodes, 14 contact holes, 15 first coupling electrodes
16 second coupling electrode P1, the first pixel electrode P2, second pixel electrode
T1 the first film transistor T 2 second thin film transistor (TFT) Clc1 first pixel capacitance
The Clc2 second pixel capacitance Cst1 first memory capacitance Cst2 second memory capacitance
The Cx coupling capacitance
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Fig. 4 is the first board structure synoptic diagram of polydomain vertical orientation LCD device of the present invention, and Fig. 5 is a polydomain vertical orientation LCD device sectional view of the present invention.
See also Fig. 4 and Fig. 5, polydomain vertical orientation LCD device of the present invention comprises first substrate 2 and second substrate 3 that is oppositely arranged; The surface of described first substrate 2 is formed with pixel electrode and slit 9, and described slit 9 is divided into electric unconnected two parts at least of with pixel electrode; Also be formed with coupling electrode on described first substrate 2; The surface of described second substrate 3 is formed with public electrode and protrusion 10.Slit 9 on the protrusion 10 on second substrate 3 and first substrate 2 is divided into a plurality of liquid crystal molecular orientations zone with pixel, realizes the wide viewing angle function of LCD.
Please continue referring to Fig. 4,11,12 are respectively gate line and the data line on first substrate.T1, T2 are two thin film transistor (TFT)s of a sub-pixel, and its grid and source electrode link to each other with data line with identical gate line, and drain electrode links to each other with different pixels electrode in the sub-pixel respectively.The channel width-over-length ratio value of the first film transistor T 1 is W1/L1, and the channel width-over-length ratio value of the second thin film transistor (TFT) T2 is W2/L2, and W1/L1 ≠ W2/L2.Slit 9 is divided into the first pixel electrode P1 and the second pixel electrode P2 with pixel electrode, and two thin film transistor (TFT) T1, T2 are respectively pixel electrode P1, P2 charging.Two pixel electrode P1, P2 form pixel capacitance Clc1, Clc2 with the public electrode 6 of upper substrate respectively.Two pixel electrode P1, P2 form memory capacitance Cst1, Cst2 with storage electrode 13 respectively.15,16 all is coupling electrode between storage electrode and the pixel electrode, and 14 is contact hole, carries out being electrical connected of source metal and transparent electrode layer.
In general, consider that mainly technology is simple when designing coupling electrode at present, can realize that the multidomain display effect gets final product, extend to form coupling electrode to the pixel electrode direction as draining by capacitive coupling, but coupling electrode is lighttight metal electrode, and said method influences aperture opening ratio easily.Coupling electrode among the present invention had both guaranteed the coupling capacitance effect, did not influence aperture opening ratio again.Please be simultaneously referring to Fig. 4 and Fig. 5, the array base palte that the present invention uses generally speaking can divide three layers, gate line 11, storage electrode 13 is in lowermost layer; The middle layer is data line 12, the first coupling electrodes 15 and second coupling electrode 16; The superiors are pixel electrodes 5, and it is divided into pixel electrode P1, P2 by slit 9.Wherein, first coupling electrode 15 and the first pixel electrode P1 are electrical connected, and its position is positioned at second pixel electrode P2 below, forms coupling capacitance with it; Second coupling electrode 16 then is electrical connected with the second pixel electrode P2, its position is positioned at first pixel electrode P1 below, form coupling capacitance with it, first coupling electrode 15 is corresponding with described protrusion 10, second coupling electrode 16 also with described protrusion 10 corresponding (figure does not show).The length and the size of coupling electrode 15,16 can be considered according to specific product, have on the one hand both guaranteed the coupling capacitance effect, make it have shade function to protrusion on the other hand again.Preferably, coupling electrode is a bit larger tham corresponding protrusion 10 sizes in its top, to guarantee its shade function.The first pixel electrode P1 and second pixel electrode P2 below all have coupling electrode to form coupling capacitance with it, and the position is corresponding to the protrusion place that influences display effect, so both guaranteed that coupling capacitance had enough capacitances, avoided again the aperture opening ratio that lighttight first coupling electrode 15 and second coupling electrode 16 place other transmission region of pixel to cause is reduced, simultaneously, also reduced the harmful effect of protrusion to display effect.
Fig. 6 is liquid crystal indicator pixel equivalent circuit figure.
See also Fig. 6, T1, T2 are two thin film transistor (TFT)s of a sub-pixel, are respectively pixel electrode P1, P2 charging.Clc1, Clc2 are the liquid crystal capacitance that two pixel electrode P1, P2 in the sub-pixel form with the public electrode of second substrate respectively.Cst1, Cst2 are the memory capacitance that two pixel electrode P1, P2 in the sub-pixel form with storage electrode respectively.The capacitor C x coupling capacitance that to be pixel electrode form by coupling electrode, its size are the coupling capacitance sum of the coupling capacitance of first coupling electrode, second pixel electrode and second coupling electrode, first pixel electrode.
In sum, the present invention can reduce the adverse effect of lighttight coupling electrode to aperture opening ratio by with the correspondence position of the design of the coupling electrode in the pixel region at protrusion.Simultaneously, coupling electrode has the function to the protrusion shading, has reduced the light leak and the contrast that has improved panel of liquid crystal panel.
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 (3)
1, a kind of polydomain vertical orientation LCD device comprises
First substrate that is oppositely arranged and second substrate;
The surface of described first substrate is formed with pixel electrode and slit, and described slit is divided into electric unconnected two parts at least of with pixel electrode;
Also be formed with coupling electrode on described first substrate;
The surface of described second substrate is formed with public electrode and protrusion;
It is characterized in that described coupling electrode is corresponding with described protrusion.
2, polydomain vertical orientation LCD device as claimed in claim 1 is characterized in that, described coupling electrode is a bit larger tham described protrusion.
3, polydomain vertical orientation LCD device as claimed in claim 1, it is characterized in that, described slit is divided into first pixel electrode and second pixel electrode with pixel electrode, by the first film transistor and the control of second thin film transistor (TFT), described the first film transistor has different raceway groove width/length ratio with second thin film transistor (TFT) respectively for described first pixel electrode and described second pixel electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100454732A CN101477281A (en) | 2009-01-16 | 2009-01-16 | Polydomain vertical orientation LCD device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100454732A CN101477281A (en) | 2009-01-16 | 2009-01-16 | Polydomain vertical orientation LCD device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101477281A true CN101477281A (en) | 2009-07-08 |
Family
ID=40838018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100454732A Pending CN101477281A (en) | 2009-01-16 | 2009-01-16 | Polydomain vertical orientation LCD device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101477281A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102402068A (en) * | 2011-10-28 | 2012-04-04 | 深圳市华星光电技术有限公司 | Multi-domain vertical alignment LCD (liquid crystal display) panel |
| CN102087448B (en) * | 2009-12-08 | 2015-10-14 | 群创光电股份有限公司 | Thin film transistor base plate and display panels |
-
2009
- 2009-01-16 CN CNA2009100454732A patent/CN101477281A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102087448B (en) * | 2009-12-08 | 2015-10-14 | 群创光电股份有限公司 | Thin film transistor base plate and display panels |
| CN102402068A (en) * | 2011-10-28 | 2012-04-04 | 深圳市华星光电技术有限公司 | Multi-domain vertical alignment LCD (liquid crystal display) panel |
| WO2013060039A1 (en) * | 2011-10-28 | 2013-05-02 | 深圳市华星光电技术有限公司 | Multi-domain vertical alignment liquid crystal display panel |
| CN102402068B (en) * | 2011-10-28 | 2014-04-09 | 深圳市华星光电技术有限公司 | Multi-domain vertical alignment LCD (liquid crystal display) panel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR102107885B1 (en) | Capacitive voltage division type color distortion reduction pixel circuit | |
| US10670930B2 (en) | Liquid crystal display capable of preventing display defect and rubbing failure | |
| US7518684B2 (en) | Pixel structure and liquid crystal display panel | |
| CN101441380B (en) | LCD device of multi-domain vertical orientation mode | |
| CN104347012A (en) | Curved display device | |
| US20130120680A1 (en) | Tft array substrate and display device | |
| KR20090123738A (en) | Panel, liquid crystal display including the same and method for manufacturing thereof | |
| CN102681276A (en) | Array substrate, method for manufacturing same and display device comprising same | |
| US9557613B2 (en) | Liquid crystal display having reduced image quality deterioration and an improved viewing angle, and a method of driving the same | |
| KR20090088729A (en) | Display device | |
| CN107728352B (en) | Pixel driving circuit and liquid crystal display panel | |
| KR101298424B1 (en) | Liquid crystal display of fringe field switching type | |
| CN103135294A (en) | Pixel structure of liquid crystal display panel | |
| US8451393B2 (en) | Liquid crystal display | |
| US9625780B2 (en) | Liquid crystal display | |
| JP2008262006A (en) | Active matrix substrate and liquid crystal panel | |
| CN104062809A (en) | Dual-display mode liquid crystal display | |
| CN100407026C (en) | In-plane switching mode liquid crystal display device | |
| US8451413B2 (en) | Array substrate for FFS type LCD panel and method for manufacturing the same | |
| CN201289560Y (en) | Multi-domain vertical orientation liquid crystal display board | |
| CN112596306A (en) | Array substrate and display panel | |
| US9134565B2 (en) | Pixel unit and display panel having the same | |
| CN114280857B (en) | Pixel structure, display panel and display device | |
| KR20070072129A (en) | In plane switching mode liquid crystal display device having multi-domains | |
| CN101477281A (en) | Polydomain vertical orientation LCD device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090708 |