CN101526711A - VA LCD device - Google Patents
VA LCD device Download PDFInfo
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- CN101526711A CN101526711A CN200910049250A CN200910049250A CN101526711A CN 101526711 A CN101526711 A CN 101526711A CN 200910049250 A CN200910049250 A CN 200910049250A CN 200910049250 A CN200910049250 A CN 200910049250A CN 101526711 A CN101526711 A CN 101526711A
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Abstract
The invention relates to a VA LCD device. The device comprises a plurality of matrix arrayed sub-pixels, and each sub-pixel comprises a first pixel electrode and a second pixel electrode which are electrically connected, wherein, the second pixel electrode is divided into one or more electrically connected subordinate sub-pixels, the shape of the subordinate sub-pixels is basically the same, and the size of various subordinate sub-pixels in the horizontal direction and the vertical direction is 5mum-30mum. The provided VA LCD device can improve response speed of the display device and color difference of squint angles.
Description
Technical field
The present invention relates to a kind of liquid crystal indicator, particularly relate to a kind of multi-domain vertical alignment mode (VA) type liquid crystal indicator.
Background technology
Liquid crystal indicator (LCD) since its have in light weight, volume is little, thin thickness, be used in widely in the various big-and-middle undersized terminal presentation facilities.LCD comprises the LCD panel that is used for display image and the data and the gate driver circuit that are used to drive the LCD panel.The LCD panel comprises many gate lines, data line and a plurality of pixel.Each pixel includes thin film transistor (TFT) (TFT) and liquid crystal capacitor.Data drive circuit exports data-signal to data line, and gate driver circuit exports gate drive signal to gate line.
In recent years, liquid crystal indicator becomes the main flow that shows market gradually with its high image quality, low-power consumption, superiority such as radiationless.
At present, market is developed towards characteristics such as high-contrast, high brightness, low colour cast, response fast, wide angle of visibilities for the performance requirement of liquid crystal indicator.The technology that can realize wide angle of visibility requirement at present mainly contains three kinds of modes: stable twisted nematic liquid crystal (TN) is mixed wide visual angle film (WVF) liquid crystal indicator, copline switch mode (IPS) liquid crystal indicator, multi-domain vertical alignment mode (VA) liquid crystal indicator.Wherein the VA mode LCD becomes the liquid crystal indicator of main flow on the market owing to the superiority at aspects such as production and display characteristics.
In undersized display application equipment such as digital photo frame, mobile phone screen, VA type liquid crystal mode is used also becomes trend gradually.In the smaller screen structure, the general sub-pixel structure design of adopting as Fig. 1.Sub-pixel 101 is divided into top and the bottom, and the projection (protrusion) 102 of introducing nipple shape is as the liquid crystal aligning controller.Because each part is littler than original sub-pixel, can better modulate orientation.The projection 102 of nipple shape is arranged in the center of liquid crystal molecular orientation.
In order to improve the penetrance of VA type liquid crystal indicator, a pair of λ/4 slice of arranging in pairs or groups usually.As shown in Figure 2, the penetrance of device is improved in collocation a pair of λ/4 slices 104 between liquid crystal cell and pair of cross Polarizer 103, and realizes wide viewing angle.
Because the limitation of nipple shape projection size and structure to liquid crystal modulation capability deficiency, thereby causes response device speed slower.
Owing to the limitation of VA pattern itself, under the angle of squint, gamma curve can be more many than the skew of the gamma curve under the positive visual angle, thereby unavoidably exist the aberration phenomenon under the angle of squint simultaneously.
Summary of the invention
Technical matters to be solved by this invention provides a kind of VA type liquid crystal indicator, can improve the display device response speed, improves the aberration of angle of squint.
The present invention solves the problems of the technologies described above the technical scheme that adopts to provide a kind of VA type liquid crystal indicator, comprise one or more sub-pixels that are rectangular arrangement, each sub-pixel comprises first pixel electrode and second pixel electrode that is electrically connected, wherein, described second pixel electrode is divided into a plurality of inferior sub-pixels that are electrically connected, the shape size of described a plurality of inferior sub-pixels is roughly the same, and each inferior sub-pixel level and vertical direction size are 5um～30um.
Above-mentioned VA type liquid crystal indicator, described inferior sub-pixel are square, circular, polygonal or rhombus.
Above-mentioned VA type liquid crystal indicator, described inferior pixel electrode is provided with otch.
The present invention contrasts prior art following beneficial effect: VA type liquid crystal indicator provided by the invention, the size of directly dwindling second pixel electrode makes it become an inferior sub-pixel, perhaps second pixel electrode is divided into a plurality of inferior sub-pixels that are electrically connected, by controlling the size of inferior sub-pixel, utilize the fringing field effect of pixel electrode, to improve response speed.Simultaneously first pixel electrode and second pixel electrode are adopted different design, cause the inconsistent distribution of line of electric force, make liquid crystal molecule under electric field action, produce and inconsistently topple over state of orientation, thereby improve the aberration of angle of squint in the pixel top and the bottom.
Description of drawings
Fig. 1 is existing smaller screen sub-pixel structure synoptic diagram.
Fig. 2 is the structural representation of liquid-crystal apparatus in the prior art.
Fig. 3 is the dot structure synoptic diagram that first pixel electrode and second pixel electrode adopt different sizes.
Fig. 4 is two kinds of dot structure aberration comparison diagrams among Fig. 3.
Fig. 5 is the dot structure synoptic diagram of VA type liquid crystal indicator of the present invention.
Fig. 6 is other distressed structure synoptic diagram of the inferior sub-pixel of VA type liquid crystal indicator of the present invention.
Among the figure:
101 pixel electrodes, 102 projections
103 Polarizers, 104 λ/4
105 inferior sub-pixels
Embodiment
The invention will be further described below in conjunction with accompanying drawing and exemplary embodiments.
VA type liquid crystal indicator of the present invention comprise a plurality of sub-pixels that are rectangular arrangement, each sub-pixel comprises the top and the bottom that are electrically connected, i.e. first pixel electrode and second pixel electrode, wherein, described first pixel electrode and the not of uniform size of second pixel electrode cause.
Fig. 3 be first pixel electrode with second pixel electrode adopt the dot structure synoptic diagram of different sizes, Fig. 4 be among Fig. 3 two kinds of dot structures under different visual angles and the aberration comparison diagram of facing.
See also Fig. 3, general sub-pixel comprises the top and the bottom that are electrically connected, and first pixel electrode and second pixel electrode all are square, and the length of side is 50um, and just second pixel electrode square length of side is reduced to 30um now, and the result is as follows by analog response speed:
| Tr(ms) | Tf(ms) | Tr+Tf(ms) | |
| convention | 12.71 | 20.71 | 33.42 |
| new | 11.34 | 20.38 | 31.72 |
Wherein, Tr be brightness by the darkest (10%) rise time to the brightest (90%), Tf is the fall time of brightness 90% to 10%.Response results when the convention hurdle is first pixel electrode identical with second pixel size (length of side all is 50um), the new hurdle is the response results after the second pixel electrode square being reduced to 30um and omitting projection.Please continue referring to Fig. 4, the convention curve is first pixel electrode and second pixel size response results when all being 50um among the figure, the new curve is for being reduced to the second pixel electrode square response results behind the 30um, horizontal ordinate is the visual angle, ordinate is an aberration, in the visible angle scope, different visual angles is littler than traditional structure in new structure with respect to the value of chromatism of positive angle.
Find out that by above-mentioned simulation the dot structure that reduces after the second pixel electrode size is all having improvement aspect response speed and the aberration (4V pressure reduction analog result).It is because dwindled Pixel Dimensions that response speed improves, and is equivalent to strengthen fringing field effect, increases the line of electric force density in the pixel region.The reason that aberration improves is because the different structure in top and the bottom causes pixel Electric Field Distribution top and the bottom difference, and liquid crystal aligning produces difference (particularly evident under low GTG), thereby improves aberration.If Pixel Dimensions is tapered to littler, the structure conversion is more various, obviously can further promote response speed and improve aberration.But reduce second pixel electrode merely and can influence aperture opening ratio.
Fig. 5 is the dot structure synoptic diagram of VA type liquid crystal indicator of the present invention.
In order to promote response speed, improve aberration, do not influence aperture opening ratio again, VA type liquid crystal indicator of the present invention comprise a plurality of sub-pixels that are rectangular arrangement, each sub-pixel comprises the top and the bottom that are electrically connected, i.e. first pixel electrode and second pixel electrode, wherein, described second pixel electrode is divided into a plurality of inferior sub-pixels 105 that are electrically connected, and promptly dot structure adopts the inconsistent design in top and the bottom.First pixel electrode and inferior sub-pixel 105 are square, inferior sub-pixel has less Pixel Dimensions, the general first pixel electrode length of side is 50um, and inferior sub-pixel 105 length of sides size is 5um～30um, keeps being electrically connected by ITO (tin indium oxide) between a plurality of inferior sub-pixels.When applying voltage, by connecting ITO pixel voltage is joined inferior sub-pixel, a plurality of inferior sub-pixels 105 form an orientation area because fringing field effect on every side topples over orientation with the modulation liquid crystal molecule towards the core of this Asia sub-pixel.(5um～30um), corresponding line of electric force density is stronger in this part, thereby driving liquid crystal molecular orientation that can be very fast, thereby realizes response fast, improves the response speed of device because this Asia sub-pixel partly has less size.
Simultaneously because the top and the bottom of sub-pixel have very different architectural feature, even under same driven, because the difference of electric force lines distribution, cause the Liquid Crystal Molecules Alignment orientation difference of top and the bottom, reduce the difference of gamma curve under positive visual angle and the angle of squint on the whole, thereby improved the aberration problem of angle of squint.
Fig. 6 is other distressed structure synoptic diagram of the inferior sub-pixel of VA type liquid crystal indicator of the present invention.
The Central Asia of the present invention sub-pixel also can use other distressed structures, sees also Fig. 6, can be circle, polygon, rhombus or other structures, controls inferior sub-pixel 105 levels and vertical direction size for 5um～30um, can improve response speed preferably.When satisfying response speed, inferior sub-pixel no longer needs engagement protrusion or ITO.Certainly, in order further to improve response speed, also can in inferior sub-pixel structure, add the raised structures of nipple shape on the color membrane substrates or on inferior sub-pixel 105 electrodes, the ITO otch is set, to strengthen modulation to inferior sub-pixel place liquid crystal molecule.
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 VA type liquid crystal indicator, comprise a plurality of sub-pixels that are rectangular arrangement, each sub-pixel comprises first pixel electrode and second pixel electrode that is electrically connected, it is characterized in that, described second pixel electrode is divided into one or more inferior sub-pixels that are electrically connected, the shape size of described a plurality of inferior sub-pixels is roughly the same, and each inferior sub-pixel level and vertical direction size are 5um～30um.
2, VA type liquid crystal indicator according to claim 1 and 2 is characterized in that, described inferior sub-pixel is square, circular, polygonal or rhombus.
3, VA type liquid crystal indicator according to claim 1 is characterized in that, described inferior pixel electrode is provided with otch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100492503A CN101526711B (en) | 2009-04-14 | 2009-04-14 | Multidomain VA LCD device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100492503A CN101526711B (en) | 2009-04-14 | 2009-04-14 | Multidomain VA LCD device |
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| Publication Number | Publication Date |
|---|---|
| CN101526711A true CN101526711A (en) | 2009-09-09 |
| CN101526711B CN101526711B (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100492503A Expired - Fee Related CN101526711B (en) | 2009-04-14 | 2009-04-14 | Multidomain VA LCD device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896591A (en) * | 2015-12-18 | 2017-06-27 | 乐金显示有限公司 | Liquid crystal display device |
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2009
- 2009-04-14 CN CN2009100492503A patent/CN101526711B/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896591A (en) * | 2015-12-18 | 2017-06-27 | 乐金显示有限公司 | Liquid crystal display device |
| CN106896591B (en) * | 2015-12-18 | 2020-11-06 | 乐金显示有限公司 | Liquid crystal display device having a plurality of pixel electrodes |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101526711B (en) | 2011-11-30 |
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Owner name: NANJING CEC PANDA LCD TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SVA (GROUP) CO., LTD. Effective date: 20110613 |
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Free format text: CORRECT: ADDRESS; FROM: 200233 3/F, NO. 757, YISHAN ROAD, XUHUI DISTRICT, SHANGHAI TO: 210038 NO. 9, HENGYI ROAD, NANJING ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE, NANJING CITY, JIANGSU PROVINCE |
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Effective date of registration: 20110613 Address after: 210038 Nanjing economic and Technological Development Zone, Jiangsu Province, Hengyi Road, No. 9, No. Applicant after: NANJING CEC PANDA LCD TECHNOLOGY Co.,Ltd. Address before: 200233, Shanghai, Yishan Road, No. 757, third floor, Xuhui District Applicant before: SVA OPTRONICS |
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