CN101526699B - LCD device with multi-domain vertical alignment mode - Google Patents
LCD device with multi-domain vertical alignment mode Download PDFInfo
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- CN101526699B CN101526699B CN2009100497742A CN200910049774A CN101526699B CN 101526699 B CN101526699 B CN 101526699B CN 2009100497742 A CN2009100497742 A CN 2009100497742A CN 200910049774 A CN200910049774 A CN 200910049774A CN 101526699 B CN101526699 B CN 101526699B
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Abstract
The invention relates to an LCD device with a multi-domain vertical alignment mode. The LCD device comprises a first substrate and a second substrate which are oppositely arranged, and a liquid crystal layer which is filled between the first substrate and the second substrate. A plurality of pixels are formed on the second substrate, a pixel electrode is formed in each pixel area, and a plurality of slits are formed on the pixel electrodes, a public electrode is formed on the surface of the first substrate, and projections or slits are formed on the public electrode, wherein, horizontal control electrodes are arranged under part of the slits on the pixel electrodes, the horizontal control electrodes are parallel to the slits, and width of the horizontal control electrodes is less than that of the slits. The LCD device with multi-domain vertical alignment mode helps realize multi-domain alignment, solve the problem of color shift, does not cause charge accumulation, and requires no complex drive.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator, particularly relate to a kind of liquid crystal indicator of horizontal component of electric field control multi-domain vertical orientation mode.
Background technology
Liquid crystal in the liquid crystal indicator itself is not luminous.Thereby liquid crystal display is to reverse the light transmission rate of control liquid crystal cells by the electric field controls liquid crystal molecule, thereby reaches the purpose of demonstration.In the liquid crystal indicator of vertical alignment mode, use the liquid crystal that shows negative dielectric anisotropic to constitute liquid crystal cells.With reference to United States Patent (USP) 6661488B1, as shown in Figure 1, the liquid crystal indicator of existing vertical alignment mode comprises first substrate 101 and second substrate 104 that is oppositely arranged, and is filled in the liquid crystal molecule 106 between first substrate 101 and second substrate 104; Be formed with mutual intersection multi-strip scanning signal wire 108 and data signal line 109 on second substrate 104, memory capacitance concentric line 110 is parallel to each other with scan signal line 108, this scan signal line 108 and data signal line 109 intersections define pixel region 100, be formed with pixel electrode 103 in the pixel region 100, the infall of scan signal line 108 and data signal line 109 is provided with thin film transistor (TFT) (TFT), TFT comprises grid, source electrode and drain electrode, and with gate overlap with source electrode and the drain electrode between formation raceway groove semiconductor layer 112, drain electrode is electrically connected with pixel electrode 103 by contact hole 113, is formed with slit 107 on the pixel electrode 103; Be formed with transparent public electrode 102 on first substrate 101, be formed with projection 105 on the public electrode 102, projection 105 is staggered relative with slit 107.
Liquid crystal indicator is not applying under the voltage condition, and liquid crystal molecule 106 is arranged perpendicular to first substrate 101 and second substrate 104, as shown in Figure 1a; Electric signal can be by being attached to first substrate 101 respectively and the public electrode above second substrate 104 102 applies with pixel electrode 103.Applying under the voltage condition, liquid crystal molecule 106 trends towards arranging perpendicular to direction of an electric field, thereby departs from the direction perpendicular to first substrate 101 and second substrate 104.Concrete deflection angle is relevant with institute's bias voltage size that applies, shown in Fig. 1 b.So, change the light transmission characteristic of liquid crystal pixel, realize the demonstration of image by the modulation of voltage signal realization to liquid crystal molecule.
In the time of the liquid crystal molecules tilt certain angle, the observer will observe different display effects from different perspectives, the visual angle problem of Here it is liquid crystal indicator.For solving the visual angle problem, multiple technologies are developed.Wherein, vertical orientated liquid crystal display is by designing the different subregion in angle of inclination (farmland) in pixel, and the display characteristic of pixel is wherein each the farmland effect of integral mean spatially.Like this, the difference of seeing when observing liquid crystal indicator from different perspectives reduces, and the visual angle is improved.Shown in Fig. 1 c, the liquid crystal molecules tilt situation in the pixel region 100 is divided into four farmland A, B, C, D.
Because there is tangible colour cast in vertical orientated liquid crystal display, be that the front is seen with the side and seen that difference is bigger, for further improving the visual angle, lower the phenomenon of colour cast, proposed at present the transparency electrode that connects with TFT in the liquid crystal pixel zone further is divided into different zones, apply different voltage in zones of different, make liquid crystal molecules tilt degree varies sample, as shown in Figure 2, the 20 different heeling conditions that have at the different subregions of pixel for liquid crystal molecule, liquid crystal molecule are in 21 and 22 two kind of heeling condition respectively, so just increase liquid crystal display farmland number, the realization multidomain shows, thereby further improves viewing angle characteristic.The pixel electrode voltage technology such as (TT structures) that has capacitive coupling method (CC structure) and transistor to control zones of different in the pixel separately at present solves the colour cast problem of vertical orientated liquid crystal display.The CC structure causes aperture opening ratio to reduce owing to there is capacitive coupling, in addition because electric capacity connects, and the pixel electrode that floats can cause the electric charge accumulation, thereby produces image retention, reduces display quality.And the TT structure needs more drive IC number and complicated drive IC, causes the rising of cost.Therefore be necessary to develop new multi-domain vertical alignment lcd technology, solve the colour cast problem of vertical orientated liquid crystal display.
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 of horizontal component of electric field control, can not cause the electric charge accumulation, does not also need complicated driving.
For addressing the above problem, the invention provides a kind of liquid crystal indicator of multi-domain vertical orientation mode, comprise first substrate and second substrate that are oppositely arranged, be formed with a plurality of pixels on this second substrate, be formed with pixel electrode in each pixel region, be formed with a plurality of slits on this pixel electrode, be formed with public electrode on this first substrate surface, be formed with projection or slit on this public electrode; Be filled in the liquid crystal layer between first substrate and second substrate; Be provided with horizontal control electrode below the part slit on the wherein said pixel electrode, described horizontal control electrode and described slit parallel, and the width of described horizontal control electrode is less than the width of described slit.
In the liquid crystal indicator of above-mentioned multi-domain vertical orientation mode, described horizontal control electrode is positioned at the position, middle of described slit.
In the liquid crystal indicator of above-mentioned multi-domain vertical orientation mode, described horizontal control electrode can be a control line independently.
In the liquid crystal indicator of above-mentioned multi-domain vertical orientation mode, be formed with the memory capacitance concentric line on the grid layer of described second substrate, described horizontal control electrode is arranged on the grid layer of second substrate, and described horizontal control electrode is connected with this memory capacitance concentric line.
The liquid crystal indicator of multi-domain vertical orientation mode of the present invention owing to be provided with horizontal control electrode below the part slit on pixel electrode, forms horizontal component of electric field between the side of the pixel electrode at this horizontal component of electric field control electrode and slit place; Make the liquid crystal molecule that has horizontal component of electric field pixel electrode place partly not only be subjected to the vertical electric field between first and second substrates, also be subjected to simultaneously the modulation of this horizontal component of electric field, this with pixel in be not subjected to the liquid crystal molecular orientation of horizontal component of electric field modulation different, thereby cause the interior liquid crystal molecule of pixel to have different orientations, realization multidomain orientation, solve colour cast, and the present invention has increased the number on pixel farmland under the condition that does not increase the system driving circuit complicacy.No unsettled capacitance electrode in the pixel of the present invention can not produce electric charge accumulation and remnant DC voltages simultaneously.
Description of drawings
Fig. 1 is the structural representation of multi-domain vertical orientation mode liquid crystal indicator.Wherein, Fig. 1 a is that liquid crystal indicator is not applying the situation of the arranging synoptic diagram of liquid crystal molecule under the voltage condition; Fig. 1 b is for to apply the situation of the arranging synoptic diagram of liquid crystal molecule under the situation of certain voltage; Fig. 1 c is the surface plate figure synoptic diagram of pixel region.
Fig. 2 is for division is increased to eight farmlands by four farmlands to pixel region in the prior art, and the subregion liquid crystal molecules tilt state that pixel further is divided into has the synoptic diagram of JND.
Fig. 3 is the dot structure synoptic diagram of the embodiment of the invention.
Fig. 4 a and Fig. 4 b are respectively the schematic cross-section of the embodiment of the invention along Fig. 3 C-C ' and D-D ' direction.
Fig. 5 is the gain effect simulation drawing of the embodiment of the invention.
Fig. 6 is the structural representation of another embodiment of the present invention.
Fig. 7 is the schematic cross-section of Fig. 6 along A-A ' direction.
Among the figure:
100: pixel region;
101: the first substrates; 102: public electrode;
103: pixel electrode; 104: the second substrates;
105: projection; 106: liquid crystal molecule;
107: slit; 108: scan signal line;
109: data signal line; 110: the memory capacitance concentric line; 111: semiconductor layer;
112: the source electrode metal layer connects pixel electrode part;
113: contact hole;
20: the different heeling conditions that liquid crystal molecule has at the different subregions of pixel;
21: at the mesomorphic state of sub-pixel A;
22: at the mesomorphic state of sub-pixel B;
200: the second substrates;
210: scan signal line; 211: the memory capacitance concentric line;
212: horizontal control electrode; 214: gate electrode; 215: gate insulation layer;
220: data signal line; 221: the source electrode; 222: drain electrode;
225: semiconductor layer; 226: ohmic contact layer; 231: passivation insulation;
230: contact hole; 240: slit; 241: pixel electrode
Embodiment
The invention will be further described below in conjunction with accompanying drawing and exemplary embodiments.
Fig. 3 is the dot structure synoptic diagram of the embodiment of the invention; Fig. 4 is the schematic cross-section of the embodiment of the invention along Fig. 3 C-C ' direction.
Please refer to Fig. 3 and Fig. 4, multi-domain vertical orientation mode liquid crystal indicator of the present invention comprises the first substrate (not shown) and second substrate 200 that is oppositely arranged, be filled in the liquid crystal layer (not shown) between first substrate and second substrate 200, liquid crystal layer is made of for negative and anisotropic liquid crystal material specific inductive capacity; First substrate, second substrate 200 are transparency carrier, as glass substrate, plastic base; Be formed with a plurality of pixels on this second substrate 200, each pixel region is formed by data signal line 220 and scan signal line 210 intersection definition, the infall of data signal line 220 and scan signal line 210 is provided with thin film transistor (TFT), thin film transistor (TFT) is by gate electrode 214, source electrode 221 and drain electrode 222 are formed, be formed with pixel electrode 241 in the pixel region, drain electrode 222 is electrically connected by contact hole 230 and pixel electrode 241, be formed with a plurality of slits 240 on this pixel electrode 241, be formed with public electrode on this first substrate surface, be formed with projection or slit on this public electrode, projection on this slit 240 and the public electrode or slit are staggered relative, pixel electrode 241, public electrode all adopts transparent conductive material to make, as tin indium oxide (ITO), indium zinc oxide (IZO) etc.; Be provided with horizontal control electrode 212 below the part slit 240 on this pixel electrode 241, this horizontal control electrode 212 forms horizontal component of electric field with the side of these slit 240 place's pixel electrodes 241.There are horizontal component of electric field in 241 of horizontal like this control electrode 212 and pixel electrodes, this liquid crystal molecule in horizontal component of electric field zone that exists is different with the electric field force that the liquid crystal molecule that does not have the horizontal component of electric field zone is subjected to, and pixel electrode 241 is divided into first sub-pixel and second sub-pixel two parts, transparency electrode with first substrate-side forms vertical electric field respectively, owing to be subjected to the horizontal component of electric field acting force, cause first sub-pixel different with the liquid crystal molecular orientation of second sub-pixel.
Memory capacitance concentric line 211 and scan signal line 210 are parallel and be in on one deck, and promptly grid layer is used for storage capacitors, and horizontal control electrode 212 is preferably disposed on the grid layer, also can be arranged on other layer certainly.When horizontal control electrode 212 is arranged on the grid layer, can also can be connected with memory capacitance concentric line 211 for a control line independently, promptly horizontal control electrode 212 serves as the memory capacitance concentric line simultaneously.The width of horizontal control electrode 212 is good less than the width of slit 240 with the position, middle that is positioned at slit 240.
Being arranged on grid layer with horizontal control electrode 212 is example, and concrete manufacturing process is please in conjunction with Fig. 4 a and Fig. 4 b.At first forming first conductive layer on second substrate 200 is grid layer, adopts the scan signal line 210 of mask process formation patterning, memory capacitance concentric line 211, horizontal control electrode 212, and gate electrode 214.Thereafter technology is identical with traditional LCD device in vertical orientation mode, forms gate insulation layer 215, semiconductor layer 225, ohmic contact layer 226, source electrode 221 and drain electrode 222, passivation insulation 231, pixel electrode 241 successively on gate electrode layer.
Fig. 5 is the gain effect simulation drawing of the embodiment of the invention, as can be seen from the figure, traditional vertical orientated liquid crystal display and vertical orientated liquid crystal display of the present invention are 1.23 and 1.18 in the aberration ratio of 0 degree and 60 degree, and the liquid crystal indicator of this explanation structure of the present invention can improve aberration.
Fig. 6 is the structural representation of another embodiment of the present invention; Fig. 7 is the schematic cross-section of Fig. 6 along A-A ' direction.
Please refer to Fig. 6, Fig. 7, slit 240 is certain angle with horizontal direction among the figure, horizontal control electrode 212 still is positioned at the middle and slit 240 keeping parallelisms of slit 240, forms horizontal component of electric field to guarantee the horizontal control electrode 212 and the side of slit 240 place's pixel electrodes.In order to be connected with memory capacitance concentric line 211, horizontal control electrode 212 both ends horizontal stretch, and horizontal control electrode 212 correspondingly forms one section broken line at each pixel region.
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 (4)
1. the liquid crystal indicator of a multi-domain vertical orientation mode comprises
First substrate that is oppositely arranged and second substrate, be formed with a plurality of pixels on this second substrate, be formed with pixel electrode in each pixel region, be formed with a plurality of slits on this pixel electrode, be formed with public electrode on this first substrate surface, be formed with projection or slit on this public electrode;
Be filled in the liquid crystal layer between first substrate and second substrate;
It is characterized in that being provided with horizontal control electrode below the part slit on the described pixel electrode, slit on described horizontal control electrode and the described pixel electrode parallels, and the width of described horizontal control electrode is less than the width of the slit on the described pixel electrode.
2. the liquid crystal indicator of multi-domain vertical orientation mode according to claim 1 is characterized in that described horizontal control electrode is positioned at the position, middle of the slit on the described pixel electrode.
3. the liquid crystal indicator of multi-domain vertical orientation mode according to claim 1 and 2 is characterized in that described horizontal control electrode is a control line independently.
4. the liquid crystal indicator of multi-domain vertical orientation mode according to claim 1 and 2, it is characterized in that being formed with the memory capacitance concentric line on the grid layer of described second substrate, described horizontal control electrode is arranged on the grid layer of second substrate, and described horizontal control electrode is connected with this memory capacitance concentric line.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100497742A CN101526699B (en) | 2009-04-22 | 2009-04-22 | LCD device with multi-domain vertical alignment mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100497742A CN101526699B (en) | 2009-04-22 | 2009-04-22 | LCD device with multi-domain vertical alignment mode |
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| CN101526699A CN101526699A (en) | 2009-09-09 |
| CN101526699B true CN101526699B (en) | 2011-05-18 |
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| CN2009100497742A Expired - Fee Related CN101526699B (en) | 2009-04-22 | 2009-04-22 | LCD device with multi-domain vertical alignment mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110928094B (en) * | 2019-12-31 | 2020-12-15 | 成都中电熊猫显示科技有限公司 | Array substrate and liquid crystal panel |
| CN111258130B (en) * | 2020-03-16 | 2023-05-30 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display panel having a light shielding layer |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982987A (en) * | 2005-12-14 | 2007-06-20 | 三星电子株式会社 | Liquid crystal display and method of manufacturing thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1982987A (en) * | 2005-12-14 | 2007-06-20 | 三星电子株式会社 | Liquid crystal display and method of manufacturing thereof |
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| Title |
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| JP特开2007－256811A 2007.10.04 |
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Owner name: NANJING CEC-PANDA LCD TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SVA (GROUP) CO., LTD. Effective date: 20110801 |
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Free format text: CORRECT: ADDRESS; FROM: 200233 XUHUI, SHANGHAI TO: 210038 NANJING, JIANGSU PROVINCE |
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Effective date of registration: 20110801 Address after: 210038 Nanjing economic and Technological Development Zone, Jiangsu Province, Hengyi Road, No. 9, No. Patentee after: NANJING CEC PANDA LCD TECHNOLOGY Co.,Ltd. Address before: 200233, Shanghai, Yishan Road, No. 757, third floor, Xuhui District Patentee before: SVA OPTRONICS |
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