CN103376601A - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN103376601A CN103376601A CN2012101238198A CN201210123819A CN103376601A CN 103376601 A CN103376601 A CN 103376601A CN 2012101238198 A CN2012101238198 A CN 2012101238198A CN 201210123819 A CN201210123819 A CN 201210123819A CN 103376601 A CN103376601 A CN 103376601A
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Abstract
An embodiment of the invention provides a liquid crystal display device. The liquid crystal display device comprises a first substrate, a second substrate and a liquid crystal layer clamped between the first substrate and the second substrate. The first substrate is provided with a first pixel electrode, a second pixel electrode and a third pixel electrode. The second substrate is provided with a counter substrate. The first pixel electrode and the counter substrate form a first overlapping region, the second pixel electrode and the counter substrate overlapping region form a second overlapping region, the third pixel electrode and the counter substrate form a third overlapping region, and the first overlapping region is smaller than the second overlapping region and the third overlapping region. In addition, the embodiment of the invention further provides the other liquid crystal display device. Intervals between the first pixel electrode, the second pixel electrode and the third pixel electrode and the counter substrate are different.
Description
Technical field
Present invention is directed to liquid crystal indicator, and particularly relevant for a kind of liquid crystal indicator that improves gray inversion.
Background technology
Liquid crystal indicator system utilizes liquid crystal molecule under different ordered states, and the characteristic that has different polarizations or refraction effect for light is controlled the amount of penetrating of light, and then makes liquid crystal indicator be produced image.Tradition stable twisted nematic (Twisted Nematic, TN) liquid crystal indicator has good through characteristic, but is subject to the impact of liquid crystal molecule structure and optical characteristics, and its visual perspective is very narrow.Therefore how to allow display have simultaneously wide viewing angle and high light utilization efficiency concurrently, the counter plate display technique is caused new breakthrough.
For head it off, recently the dealer has developed vertical orientation type (Vertical Alignment, VA) wide viewing angle liquid crystal display device, for example: figure vertical orientation type (Patterned Vertical Alignment, PVA) liquid crystal indicator, multiregional vertical align type (Multi-domain Vertical Alignment, MVA) liquid crystal indicator; Wherein the PVA type is to utilize fringing field effect and compensating plate to reach the purpose of wide viewing angle.Then be that a pixel is separated into a plurality of zones as for the MVA type, and the special pattern structure of use thrust or transparent conductive film of In-Sn oxide (ITO), the liquid crystal molecule that is positioned at zones of different can be toppled over towards different directions, therefore can reach simultaneously wide viewing angle and the effect that promotes penetrance.
Yet VA type liquid crystal indicator still has its shortcoming to be overcome at present.Referring to Fig. 1, it shows the top view of the liquid crystal layer of a known VA type liquid crystal display 100.When bestowing voltage to two electrode, liquid crystal molecule 102,104,106 is fallen down towards different horizontal direction 120,130 by electric field action separately, but be parallel to a plurality of liquid crystal molecules 102,104 that direction of an electric field (penetrating the direction of paper among the figure) arranges and all be towards identical horizontal direction (for example direction 120) to fall down and reverse without level, cause light can't penetrate these 120 liquid crystal molecules that fall down 102,104 under par side, so that the brightness of VA type liquid crystal indicator descends to some extent.In addition, present VA type liquid crystal indicator mainly still has the problem of gray inversion.In theory, liquid crystal indicator should be that grey is higher then brighter from zero gray scale (black) to 255 gray scales (white), but liquid crystal indicator might see that in certain wide-angle low gray scale is also brighter than high gray scale on the contrary, namely see the phenomenon of similar black white reverse, what this phenomenon claimed is gray inversion.
At present, develop the technology that adds chirality (chiral) adulterant adding liquid crystal layer, overcome the problems referred to above.For example, referring to Fig. 2, it shows the top view of the liquid crystal layer of a known VA type liquid crystal display 200 that contains chiral dopant.When bestowing voltage to two electrode, when bestowing voltage to two electrode, the liquid crystal molecule 202,204,206 of liquid crystal layer is fallen down towards different horizontal direction 220,230 by electric field action, all have different horizontal torsions but be parallel to a plurality of liquid crystal molecules 202,204 that direction of an electric field (penetrating the direction of paper among the figure) arranges, cause light can see through liquid crystal molecule 202,204 birefringence (birefirengence) penetrates all liquid crystal molecules.In addition, by adding chiral dopant, also can improve that these liquid crystal molecules 202,204 are not toppled over or dump angle mistake and the Optical Dark Solitary Pulse line that produces attenuate thin outly, and improve the phenomenon of gray inversion.
Yet, though the phenomenon of gray inversion can enter liquid crystal layer and is improved by adding optically active substance, especially severe especially when the gray inversion phenomenon is larger in the liquid crystal layer gap and in blue pixel.In view of this, how promoting the penetrance that liquid crystal display puts and avoid simultaneously producing the gray inversion phenomenon, is the important topic of current display technology.
Summary of the invention
The embodiment of the invention provides a kind of liquid crystal indicator, comprising: a first substrate, and it has a blue pixel electrode, a green pixel electrode and a red pixel electrode; One second substrate, it has a subtend electrode, wherein this blue pixel electrode therewith counter electrode have one first overlapping region, this green pixel electrode therewith counter electrode have one second overlapping region, this red pixel electrode therewith counter electrode have triple-overlapped zone, this first overlapping region is less than this second overlapping region and this triple-overlapped zone; And a liquid crystal layer, be located between this first substrate and this second substrate.
The embodiment of the invention also provides a kind of liquid crystal indicator, comprising: a first substrate, and it has a blue pixel electrode, a green pixel electrode and a red pixel electrode; One second substrate, it has a subtend electrode; And a liquid crystal layer, be located between this first substrate and this second substrate, wherein this blue pixel electrode therewith the interval between the first substrate less than this green pixel electrode and this red pixel electrode interval between the second substrate therewith.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 shows the top view according to the liquid crystal layer of known VA type liquid crystal display.
Fig. 2 shows the top view according to the liquid crystal layer of known VA type liquid crystal display.
Fig. 3 shows the sectional view of the liquid crystal indicator of one embodiment of the invention.
Fig. 4 to 8 shows the top view according to the electrode pattern of the liquid crystal indicator of each embodiment.
Fig. 9 shows the sectional view of the liquid crystal indicator of another embodiment of the present invention.
The main element symbol description:
100～liquid crystal indicator; 102～liquid crystal molecule;
104～liquid crystal molecule; 106～liquid crystal molecule;
120～horizontal direction; 130～horizontal direction;
200～liquid crystal indicator; 202～liquid crystal molecule;
204～liquid crystal molecule; 206～liquid crystal molecule;
220～horizontal direction; 230～horizontal direction;
300～liquid crystal indicator; 302～first substrate;
304～substrate; 306～pixel cell;
306b～the first pixel electrode; 306g～the second pixel electrode;
306r～the 3rd pixel electrode; 308～second substrate;
310～substrate; 312～colored filter;
312b～the first optical filter; 312g～the second optical filter;
312r～the 3rd optical filter; 314～counter electrode;
320～liquid crystal layer; 322～the first compensate films;
324～the first Polarizers; 326～the second compensate films;
328～the second Polarizers; 400～liquid crystal indicator;
406b～the first pixel electrode; 406g～the second pixel electrode;
406r～the 3rd pixel electrode; 450b～first hollows out the district;
450g～second hollows out the district; 450r～3rd hollows out the district;
452b～the first straight slit district; 452g～the second straight slit district;
452r～the 3rd straight slit district; The horizontal slit area of 454b～first;
The horizontal slit area of 454g～second; The horizontal slit area of 454r～3rd;
456b～the first intersection district; 456g～the second intersection district;
456r～the 3rd intersection district; 458b～the first finger-like extension area;
458g～the second finger-like extension area; 458r～the 3rd finger-like extension area;
460b～first rhombus hollows out the district; 460g～second rhombus hollows out the district;
460r～Three Diamond hollows out the district; 470b～4th hollows out the district;
470g～5th hollows out the district; 470r～6th hollows out the district;
472b～the 4th straight slit district; 472g～the 5th straight slit district;
472r～the 6th straight slit district; The horizontal slit area of 474b～4th;
The horizontal slit area of 474g～5th; The horizontal slit area of 474r～6th;
476b～the 4th intersection district; 476g～the 5th intersection district;
476r～the 6th intersection district; 500～liquid crystal indicator;
506b～the first pixel electrode; 506g～the second pixel electrode;
506r～the 3rd pixel electrode; 550b～first hollows out the district;
550g～second hollows out the district; 550r～3rd hollows out the district;
552b～the first straight slit district; 552g～the second straight slit district;
552r～the 3rd straight slit district; The horizontal slit area of 554b～first;
The horizontal slit area of 554g～second; The horizontal slit area of 554r～3rd;
556b～the first intersection district; 556g～the second intersection district;
556r～the 3rd intersection district; 558b～the first finger-like extension area;
558g～the second finger-like extension area; 558r～the 3rd finger-like extension area;
560b～first rhombus hollows out the district; 560g～second rhombus hollows out the district;
560r～Three Diamond hollows out the district; 570b～4th hollows out the district;
570g～5th hollows out the district; 570r～6th hollows out the district;
572b～the 4th straight slit district; 572g～the 5th straight slit district;
572r～the 6th straight slit district; The horizontal slit area of 574b～4th;
The horizontal slit area of 574g～5th; The horizontal slit area of 574r～6th;
576b～the 4th intersection district; 576g～the 5th intersection district;
576g～the 6th intersection district; 600～liquid crystal indicator;
606b～the first pixel electrode; 606g～the second pixel electrode;
606r～the 3rd pixel electrode; 650b～first hollows out the district;
650g～second hollows out the district; 650r～3rd hollows out the district;
652b～the first straight slit district; 652g～the second straight slit district;
652r～the 3rd straight slit district; The horizontal slit area of 654b～first;
The horizontal slit area of 654g～second; The horizontal slit area of 654r～3rd;
656b～the first intersection district; 656g～the second intersection district;
656r～the 3rd intersection district; 658b～the first finger-like extension area;
658g～the second finger-like extension area; 658r～the 3rd finger-like extension area;
660b～first rhombus hollows out the district; 660g～second rhombus hollows out the district;
660r～Three Diamond hollows out the district; 670b～4th hollows out the district;
670g～5th hollows out the district; 670r～6th hollows out the district;
672b～the 4th straight slit district; 672g～the 5th straight slit district;
672r～the 6th straight slit district; The horizontal slit area of 674b～4th;
The horizontal slit area of 674g～5th; The horizontal slit area of 674r～6th;
676b～the 4th intersection district; 676g～the 5th intersection district;
676r～the 6th intersection district; 678b～the 4th finger-like extension area;
678g～the five fingers shape extension area; 678r～the 6th finger-like extension area;
680b～the 4th rhombus hollows out the district; 680g～the 5th rhombus hollows out the district;
680r～the 6th rhombus hollows out the district; 700～liquid crystal indicator;
706b～the first pixel electrode; 706g～the second pixel electrode;
706r～the 3rd pixel electrode; 750b～first hollows out the district;
750g～second hollows out the district; 750r～3rd hollows out the district;
752b～the first straight slit district; 752g～the second straight slit district;
752r～the 3rd straight slit district; The horizontal slit area of 754b～first;
The horizontal slit area of 754g～second; The horizontal slit area of 754r～3rd;
756b～the first intersection district; 756g～the second intersection district;
756r～the 3rd intersection district; 758b～the first finger-like extension area;
758g～the second finger-like extension area; 758r～the 3rd finger-like extension area;
760b～first rhombus hollows out the district; 760g～second rhombus hollows out the district;
760r～Three Diamond hollows out the district; 770b～4th hollows out the district;
770g～5th hollows out the district; 770r～6th hollows out the district;
772b～the 4th straight slit district; 772g～the 5th straight slit district;
772r～the 6th straight slit district; The horizontal slit area of 774b～4th;
The horizontal slit area of 774g～5th; The horizontal slit area of 774r～6th;
776b～the 4th intersection district; 776g～the 5th intersection district;
777r～the 6th intersection district; 778b～the 4th finger-like extension area;
778g～the five fingers shape extension area; 778r～the 6th finger-like extension area;
780b～the 4th rhombus hollows out the district; 780g～the 5th rhombus hollows out the district;
780r～the 6th rhombus hollows out the district; 800～liquid crystal indicator;
806b～the first pixel electrode; 806g～the second pixel electrode;
806r～the 3rd pixel electrode; 850b～first hollows out the district;
850g～second hollows out the district; 850r～3rd hollows out the district;
852b～the first straight slit district; 852g～the second straight slit district;
852r～the 3rd straight slit district; The horizontal slit area of 854b～first;
The horizontal slit area of 854g～second; The horizontal slit area of 854r～3rd;
856b～the first intersection district; 856g～the second intersection district;
856r～the 3rd intersection district; 858b～the first finger-like extension area;
858g～the second finger-like extension area; 858r～the 3rd finger-like extension area;
860b～first rhombus hollows out the district; 860g～second rhombus hollows out the district;
860r～Three Diamond hollows out the district; 870b～4th hollows out the district;
870g～5th hollows out the district; 870r～6th hollows out the district;
872b～the 4th straight slit district; 872g～the 5th straight slit district;
872r～the 6th straight slit district; The horizontal slit area of 874b～4th;
The horizontal slit area of 874g～5th; The horizontal slit area of 874r～6th;
876b～the 4th intersection district; 876g～the 5th intersection district;
876r～the 6th intersection district; 878b～the 4th finger-like extension area;
880b～the 4th rhombus hollows out the district; 900～liquid crystal indicator;
902～first substrate; 904～substrate;
906～pixel cell; 906b～the first pixel electrode;
906g～the second pixel electrode; 906r～the 3rd pixel electrode;
908～second substrate; 912～colored filter;
912b～the first optical filter; 912g～the second optical filter;
912r～the 3rd optical filter; 914～counter electrode;
922～the first compensate films; 924～the first Polarizers;
926～the second compensate films; 928～the second Polarizers;
R1～the first distance; R2～second distance;
R3～the 3rd distance; D1～interval;
D2～interval; D3～interval.
Embodiment
Below describe and be accompanied by the example of graphic explanation in detail with each embodiment, as reference frame of the present invention.In accompanying drawing or instructions description, similar or identical part is all used identical figure number.And in the accompanying drawings, the shape of embodiment or thickness can enlarge, and to simplify or convenient the sign.Moreover the part of each element will be it should be noted that the element that does not illustrate among the figure or describe to describe respectively explanation in the accompanying drawing, be the form known to the affiliated technical field technician.
Especially severe in when the applicant finds that through testing the interval of gray inversion phenomenon between blue pixel electrode and counter electrode increases.Therefore, the object of the present invention is to provide a kind of liquid crystal indicator, it can reduce the gray inversion phenomenon of viewing area, and particularly improves the gray inversion phenomenon in the blue pixel.
Fig. 3 is the sectional view of the liquid crystal indicator 300 of the present invention's one demonstration example.The liquid crystal indicator 300 of one embodiment of the invention can be vertical orientation (VA) type liquid crystal indicator.As shown in Figure 3, liquid crystal indicator 300 comprises and being oppositely arranged and a first substrate 302 and a second substrate 308 parallel to each other substantially.In an embodiment of the present invention, first substrate 302 can be a thin film transistor base plate, and it comprises a substrate 304 and at least one the first pixel cell 306b, at least one the second pixel cell 306g and at least one the 3rd pixel cell 306r and arranges thereon.In one embodiment, can respectively do for oneself blue pixel unit 306b, green pixel unit 306g and red pixel unit 306r of the first pixel cell 306b, the second pixel cell 306g and the 3rd pixel cell 306r.But each pixel cell 306 each a self-contained pixel electrode 306 and thin film transistor (TFT) (not shown) is arranged in the substrate.For example, but the first pixel cell 306b, the second pixel cell 306g and at least one the 3rd pixel cell 306r each self-contained the first pixel electrode 306b, second pixel electrode 306g and the 3rd pixel electrode 306r can.Pixel electrode 306 can be arbitrarily transparent conductive material.Can be provided with the black matrix" (not shown) between each pixel cell.In following instructions, be easy to understand in order to make concept of the present invention, be that the pixel electrode among the first pixel cell 306b is called blue pixel electrode 306b; Pixel electrode among the second pixel cell 306g is called green pixel electrode 306g; And the pixel electrode among the 3rd pixel cell 306r is called red pixel electrode 306r, but it is not intended to limit the range of application of these pixel electrodes.
Liquid crystal layer 320 can be located between first substrate 302 and the second substrate 308, for example between pixel electrode 306 and the counter electrode.Liquid crystal layer 320 employed liquid crystal molecules are nematic liquid crystalline material, and it can be the minus nematic crystal, also can be the eurymeric nematic crystal.In one embodiment, liquid crystal layer 320 is to be added with optically active substance, for example add chiral dopant (chiral dopants), so the liquid crystal molecule of liquid crystal layer 320 can thereby have optical activity along an axial torsion, this axial system can be parallel to the normal of first substrate 302.In one embodiment, liquid crystal indicator 300 can optionally more comprise the first compensate film 322 and the first Polarizer 324 that is arranged on the first substrate 302, and optionally comprise be arranged at the second compensate film 326 and the second Polarizer 328 on second substrate 308.
Fig. 4 is the top view according to the electrode pattern of the liquid crystal indicator 400 of one embodiment of the invention.Fig. 4 shows the unit pattern that is positioned at blue pixel electrode 406b, green pixel electrode 406g and the red pixel electrode 406r of first substrate 302 (thin film transistor base plate) side and is positioned at the counter electrode 314 of second substrate 308 sides.The sectional view of liquid crystal indicator 400 can be as shown in Figure 3.
As shown in Figure 4, blue pixel electrode 406b can comprise one first area of knockout 450b, and green pixel electrode 406g can comprise one second area of knockout 450g, and red pixel electrode 406r can comprise one the 3rd area of knockout 450r.314 of counter electrodes can have the 4th area of knockout 470b corresponding to blue pixel electrode 406b, corresponding to the 5th area of knockout 470g of green pixel electrode 406g and corresponding to the 6th area of knockout 470r of red pixel electrode 406r.Blue pixel electrode 406b and counter electrode 314 can have the first overlapping region, that is the first overlapping region is that blue pixel electrode 406b deducts behind the first area of knockout 450b the overlapping region that part on the blue pixel electrode 406b is deducted 470b behind the 4th area of knockout that is overlapped in counter electrode 314.Similarly, green pixel electrode 406g and counter electrode 314 can have the second overlapping region.That is the second overlapping region is that green pixel electrode 406g deducts behind the second area of knockout 450g the overlapping region after part on the green pixel electrode 406g is deducted the 5th area of knockout 470g of being overlapped in counter electrode.Red pixel electrode 406r and counter electrode 314 can have the triple-overlapped zone, that is the overlapping region after part on the red pixel electrode 406r is deducted the 6th area of knockout 470r of being overlapped in counter electrode 314 is deducted behind the 6th area of knockout 470r for red pixel electrode 406r in triple-overlapped zone.
The first area of knockout 450b can comprise at least one the first straight slit district 452b, at least one first horizontal slit area 454b and at least one the first intersection district 456b that is positioned at its confluce; This second area of knockout 450g comprises at least one the second straight slit district 452g, at least one second horizontal slit area 454g and at least one the second intersection district 456g that is positioned at its confluce; The 3rd area of knockout 450r comprises at least one the 3rd straight slit district 452r, at least one the 3rd horizontal slit area 454r and at least one the 3rd intersection district 456r that is positioned at its confluce; The 4th area of knockout 470b comprises at least one the 4th straight slit district 472b, at least one the 4th horizontal slit area 474b and at least one the 4th intersection district 476r that is positioned at its confluce; The 5th area of knockout comprises at least one the 5th straight slit district 472g, at least one the 5th horizontal slit area 474g and at least one the 5th intersection district 476g that is positioned at its confluce; And the 6th area of knockout 470r comprises at least one the 6th straight slit district 472r, at least one the 6th horizontal slit area 474r and at least one the 6th intersection district 476r that is positioned at its confluce.The first to the 6th straight slit district 452b, 452g, 452r, 472b, 472g, 472r can be separately perpendicular to the first to the 6th horizontal slit area 454b, 454g, 454r, 474b, 474g, 474r.The first to the 6th intersection district 456b, 456g, 456r, 476b, 476g, 476r can be any desired configuration, such as circular, square, rhombus etc.
The first straight slit district 452b, the first horizontal slit area 454b and the first intersection district 456b are staggered with the 4th straight slit district 472b, the 4th horizontal slit area 474b and the 4th intersection district 476b separately; This second straight slit district 452g, the second horizontal slit area 454g and the second intersection district 456g can be staggered with the 5th straight slit district 472g, the 5th horizontal slit area 474g and the 5th intersection district 476g separately; Reaching the 3rd straight slit district 452r, the 3rd horizontal slit area 454r and the 3rd intersection district 456r is staggered with the 6th straight slit district 472r, the 6th horizontal slit area 474r and the 6th intersection district 476r separately.
In one embodiment, the area of the first to the 6th intersection district 456b, 456g, 456r, 476b, 476g, 476r can be in fact greater than the overlapping area of above-mentioned straight slit district and those horizontal slit area.In one embodiment, the two ends of the 4th to the 6th straight slit district 472b, 472g, 472r are extensible to surpass the 4th to the 6th intersection district 476b, 476g, 476r, and extensible the 4th to the 6th intersection district 476b, 476g, the 476r of surpassing in two ends of the 4th to the 6th horizontal slit area 474b, 474g, 474r.
First hollows out district 450b can more comprise at least one the first finger-like extension area 458b, the finger electrode that can comprise a plurality of separations in the first finger-like extension area, its from those first straight slits district 452b, the first horizontal slit area 454b, the first intersection district 456b to around extend so that this first hollows out district 450b and comprises and at least onely be centered close to the first rhombus that the first intersection district 456b and shape be essentially rhombus and hollow out district 460b (as shown in phantom in FIG.); This second hollow out the district 450g more comprise at least one the second finger-like extension area 458g, the finger electrode that can comprise a plurality of separations in the second finger-like extension area, from the second straight slit district 452g, the second horizontal slit area 454g, the second intersection district 456g to around extend so that this second hollows out district 450g and comprises and at least onely be centered close to the second rhombus that those second intersections district 456g and shape be essentially rhombus and hollow out district 460g; And the 3rd hollow out the district 450r more comprise at least one the 3rd finger-like extension area 458r, the finger electrode that can comprise a plurality of separations in the 3rd finger-like extension area, from those the 3rd straight slits district 452r, the 3rd horizontal slit area 454r, the 3rd intersection district 456r to around extend so that the 3rd hollows out district 450r and comprises and at least onely be centered close to the Three Diamond that the 3rd intersection district 456r and shape be essentially rhombus and hollow out district 460r.
In one embodiment, the first to the 6th area of knockout 450b, 450g, 450r, 470b, 470g, 470r (comprise the first rhombus hollows out district 460b, the second rhombus hollows out district 460g and Three Diamond hollows out district 460r) can make pixel electrode 406b, 406g, 406r produce marginal electric field, and therefore can improve the control ability of pixel electrode 406b, 406g, 406r and 314 pairs of liquid crystal layers 320 of counter electrode.
Please again referring to Fig. 4, the side that the first rhombus hollows out district 460b to the distance of the 4th intersection district 456b that is adjacent may be defined as one first apart from r1; A side to the distance of the 5th intersection district 456g that is adjacent that the second rhombus hollows out district 460g may be defined as a second distance r2; A side to the distance of the 6th intersection district 456r that is adjacent that Three Diamond hollows out district 460r may be defined as one the 3rd apart from r3.First can be less than second distance r2 and the 3rd apart from r3 apart from r1.The area that the first rhombus hollows out district 460b hollows out district 460g and Three Diamond greater than the second rhombus in fact and hollows out the area of district 460r, thus make first apart from r1 less than second distance r2 and the 3rd apart from r3.
So, by control first apart from r1 less than second distance r2 and the 3rd apart from r3, can be so that the first overlapping region of blue pixel electrode 406b and counter electrode 314 less in fact, thereby can improve gray inversion phenomenon among the blue pixel electrode 406b.In addition, since the phenomenon of the gray inversion among green pixel electrode 406g and the red pixel electrode 406r is relatively not serious, green pixel electrode 406g and red pixel electrode 406r can have the second relatively large overlapping region and triple-overlapped zone with counter electrode 314, thereby can have better penetrance.In addition, although only show among the figure that the second overlapping region of green pixel electrode 406g and counter electrode 314 is less than the triple-overlapped zone of red pixel electrode 406r and counter electrode 314, to improve the gray inversion phenomenon among the green pixel electrode 406g, but the second overlapping region also can be large with triple-overlapped zone etc. (be the r2 such as second distance in the 3rd apart from r3), so that liquid crystal indicator 400 has better penetrance.
Fig. 5 is the top view according to the electrode pattern of the liquid crystal indicator 500 of one embodiment of the invention.Fig. 5 shows the unit pattern that is positioned at blue pixel electrode 506b, green pixel electrode 506g and the red pixel electrode 506r of first substrate 302 (thin film transistor base plate) side and is positioned at the counter electrode 314 of second substrate 308 sides.The sectional view of liquid crystal indicator 500 can be as shown in Figure 3.In the present embodiment, the reference number identical with previous embodiment represents same or analogous element.
This enforcement is similar with embodiment shown in Figure 4, for example, the area that hollows out district 460b of the first rhombus among the blue pixel electrode 506b hollows out district 560g and Three Diamond compared to the second rhombus among green pixel electrode 506g and the red pixel electrode 506r and hollows out district 560r and have larger area (the first distance less than second distance r2 and the 3rd apart from r3).Yet, it should be noted that in the counter electrode 314 of second substrate 308 sides the 4th to the 6th hollows out the district does not have the 4th to the 6th straight slit district and the 4th to the 6th horizontal slit area.。Therefore, the 4th to the 6th hollow out the district and be equal in fact the 4th to the 6th intersection district 576b, 576g, 576r.In addition, although only show among the figure that the 4th to the 6th hollows out the district for the rhombus area of knockout, it also can be the shapes such as square, circular, oval.In the present embodiment, the size of the 4th to the 6th intersection district 576b, 576g, 576r and area equate, so that the first overlapping region is less than the second overlapping region and triple-overlapped zone.
Fig. 6 show according to the liquid crystal indicator 500 of one embodiment of the invention the top view of electrode pattern.Fig. 6 shows the unit pattern that is positioned at blue pixel electrode, green pixel electrode and the yellow pixel electrode of first substrate 302 (thin film transistor base plate) side and is positioned at the counter electrode 314 of second substrate 308 (colored filter substrate) side.The sectional view of liquid crystal indicator 600 can be as shown in Figure 3.In the present embodiment, the reference number identical with previous embodiment represents same or analogous element.
Present embodiment and embodiment shown in Figure 4 are similar, for example, the area that hollows out district 660b of the first rhombus among the blue pixel electrode 606b hollows out district 660g and Three Diamond compared to the second rhombus among green pixel electrode 606g and the red pixel electrode 606r and hollows out district 660r and have larger area (the first distance less than second distance r2 and the 3rd apart from r3).Yet, it should be noted that, the 4th hollows out district 670b more comprises at least one the 4th finger-like extension area 678b, the finger electrode that can comprise a plurality of separations in the 4th finger-like extension area, from the 4th straight slit district 672b, the 4th horizontal slit area 674b, the 4th intersection district 676b to around extend so that the 4th hollows out district 670b and comprises and at least onely be centered close to the 4th rhombus that the 4th intersection district 676b and shape be essentially rhombus and hollow out district 680b; The 5th hollows out district 670g more comprises at least one the five fingers shape extension area 678g, the finger electrode that can comprise a plurality of separations in the five fingers shape extension area, from the 5th straight slit district 672g, the 5th horizontal slit area 674g, the 5th intersection district 646g to around extend so that the 5th hollows out district 670g and comprises and at least onely be centered close to the 5th rhombus that the 5th intersection district 676g and shape be essentially rhombus and hollow out district 680g; And the 6th hollow out the district 670r more comprise at least one the 6th finger-like extension area 678r, the finger electrode that can comprise a plurality of separations in the 6th finger-like extension area, from the 6th straight slit district 672r, the 6th horizontal slit area 674r, the 6th intersection district 676r to around extend so that the 6th hollows out district 670r and comprises and at least onely be centered close to the 6th rhombus that the 6th intersection district 676r and shape be essentially rhombus and hollow out district 680r.
In the present embodiment, the first a rhombus side to the 4th rhombus that is adjacent of hollowing out district 660b distance of a side of hollowing out district 680b may be defined as first apart from r1; The distance of a side that a side to the 5th rhombus that is adjacent that the second rhombus hollows out district 660g hollows out district 680g may be defined as second distance r2; The distance of a side that a side to the 6th rhombus that is adjacent that Three Diamond hollows out district 660r hollows out district 680r may be defined as the 6th apart from r3.In one embodiment, first can be less than second distance r2 and the 3rd apart from r3 apart from r1.Second distance can be less than or equal to the 3rd distance.For example, as shown in Figure 6, the area that the first rhombus hollows out district 660b hollows out district 660g and Three Diamond greater than the second rhombus in fact and hollows out the area of district 660g, thereby can have less first apart from r1.In one embodiment, the area that the second rhombus hollows out district 660g hollows out the area of distinguishing 660r less than Three Diamond, and the phenomenon of gray inversion occurs to reduce green pixel electrode 606g.Yet, the penetrance better such as need, the area that also the second rhombus can be hollowed out district 660g is designed to hollow out district 660r with Three Diamond and equates.
In the present embodiment, the two ends of the two ends of the 4th to the 6th straight slit district 672b, 672g, 672r and the 4th to the 6th horizontal slit area 674b, 674g, 674r can surpass the 4th to the 6th intersection district 676b, 676g, 676r separately.In another embodiment (type 6), the two ends of two ends 672b, the 672g in the 4th to the 6th straight slit district, 672r and the 4th to the 6th horizontal slit area 674b, 674g, 674r can optionally be no more than the 4th to the 6th intersection district 676b, 676g, 676r.
Fig. 7 show according to the liquid crystal indicator 700 of one embodiment of the invention the top view of electrode pattern.Fig. 7 shows the unit pattern that is positioned at blue pixel electrode 706b, green pixel electrode 706g and the red pixel electrode 706r of first substrate 302 (thin film transistor base plate) side and is positioned at the counter electrode 314 of second substrate 308 (colored filter substrate) side.The sectional view of liquid crystal indicator 700 can be as shown in Figure 3.In the present embodiment, the reference number identical with previous embodiment represents same or analogous element.
Present embodiment and embodiment shown in Figure 6 are similar.Yet, in the present embodiment, the first rhombus hollows out district 760b, the second rhombus and hollows out district 760g and Three Diamond and hollow out district 760r and can have identical size and shape, and the 4th rhombus hollows out the area of district 780b and can be in fact hollow out the area that district 780g and the 6th rhombus hollow out district 780r greater than the 5th rhombus.Therefore, first apart from r1 still less than second distance r2 and the 3rd apart from r3, and the first overlapping region of blue plain pixel electrode 706b and counter electrode 314 is less than the second overlapping region of green pixel electrode 706g and red pixel electrode 706r and counter electrode 314 and triple-overlapped zone.In one embodiment, the area that the 5th rhombus hollows out district 780g hollows out the area of distinguishing 780r less than the 6th rhombus, and the phenomenon of gray inversion occurs to reduce green pixel electrode 706g.Yet, the penetrance better such as need, the area that also the 5th rhombus can be hollowed out district 780g is designed to hollow out district 780r with the 6th rhombus and equates.
Fig. 8 (blue pixel electrode and other color pixel electrode difformities) show according to the liquid crystal indicator 800 of one embodiment of the invention the top view of electrode pattern.Fig. 7 shows the unit pattern that is positioned at blue pixel electrode 806b, green pixel electrode 806g and the red pixel electrode 806r of first substrate 302 (thin film transistor base plate) side and is positioned at the counter electrode 314 of second substrate 308 (colored filter substrate) side.The sectional view of liquid crystal indicator 800 can be as shown in Figure 3.In the present embodiment, the reference number identical with previous embodiment represents same or analogous element.
Present embodiment and embodiment shown in Figure 7 are similar.Yet in the present embodiment, the 4th hollows out district 870b and the 5th hollows out district 870g and the 6th and hollows out and distinguish 870r and can have difformity.For example, as shown in Figure 8, the 5th hollows out district 870g can comprise the 5th straight slit district 872g, the 5th horizontal slit area 874g and the 5th intersection district 876g; The 6th hollows out district 870r can comprise the 6th straight slit district 872r, the 6th horizontal slit area 874r and the 6th intersection district 876r, and the 4th hollow out the district 870b compared to the 5th and the 6th hollow out the district 870g, 870r can more comprise the 4th finger-like extension area 878b, for example comprise the 4th straight slit district 870b, the 4th horizontal slit area 874b, the 4th intersection district 876b and the 4th finger-like extension area 878b., can comprise the finger electrode of a plurality of separations in the 4th finger-like extension area.The 4th intersection district 876b, the 5th intersection district 876g and the 6th intersection district 876r can be of similar shape and size.Therefore, by the design of the 4th finger-like extension area 878b, blue pixel electrode 806 is regional less than the second overlapping region and the triple-overlapped of green pixel electrode 806g and red pixel electrode 806r and counter electrode 314 with the first overlapping region of counter electrode 314.
In one embodiment, the 5th and the 6th hollows out district 870g, 870r also can have other and hollow out the different arbitrary shape of district 870b with the 4th, and the 5th and the 6th hollows out and distinguish 870g, 870r and also can have difformity each other.In other embodiments, the 5th hollow out the district 870g area can optionally be less than or equal to the 6th hollow out the district 870r area.
Fig. 9 is the sectional view of the liquid crystal indicator 900 of one embodiment of the invention.The liquid crystal indicator 900 of one embodiment of the invention can be vertical orientation (VA) type liquid crystal indicator.In one embodiment, first substrate 902 can be considered a thin film transistor base plate, and it is to comprise a substrate 904 and at least one the first pixel cell 906b, at least one the second pixel cell 906g and at least one the 3rd pixel cell 906r to arrange thereon.In one embodiment, can respectively do for oneself blue pixel unit 906b, green pixel unit 906g and red pixel unit 906r of the first pixel cell 906b, the second pixel cell 906g and the 3rd pixel cell 906r.But each pixel cell 906 each a self-contained pixel electrode 906 and thin film transistor (TFT) (not shown) is arranged in the substrate.For example, but the first pixel cell 906b, the second pixel cell 906g and the 3rd pixel cell 906r each self-contained the first pixel electrode 906b, the second pixel electrode 906g and the 3rd pixel electrode 906r.Pixel electrode 906 can be arbitrarily transparent conductive material.Can be provided with the black matrix" (not shown) between each pixel cell.In following instructions, be easy to understand in order to make concept of the present invention, be that the pixel electrode among the first pixel cell 906b is called blue pixel electrode 906b; Pixel electrode among the second pixel cell 906g is called green pixel electrode 906g; And the pixel electrode among the 3rd pixel cell 906r is called red pixel electrode 906, yet it is not intended to limit the range of application of these pixel electrodes.
Colored filter can comprise corresponding to the blue color filter 912b of blue pixel electrode 906b, corresponding to the green color filter 912g of green pixel electrode 906g and corresponding to the Red lightscreening plate 912r of red pixel electrode 906r.Blue color filter 912b, green color filter 912g and Red lightscreening plate 912r can have different-thickness.For example, the thickness of blue color filter 912b can be greater than the thickness of green color filter 912g and Red lightscreening plate 912r.Since counter electrode 914 be compliance be arranged on the colored filter 912, the interval d1 between blue plain pixel electrode 906b and the counter electrode 914 can be less than interval d2, the d3 between green pixel electrode 906g and red pixel electrode 906r and the counter electrode 914.Therefore, can be reduced in the probability that gray inversion occurs blue pixel unit 906b.The liquid crystal indicator 900 that provides according to this exposure embodiment is provided, also can be comprised the electrode pattern such as the 4th to the 8 arbitrary embodiment of figure, being reduced in the probability of blue pixel unit generation gray inversion, and can keep penetrance.
Although the present invention discloses as above with preferred embodiment; so it is not to limit 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 (19)
1. liquid crystal indicator comprises:
One first substrate, it has one first pixel electrode, one second pixel electrode and one the 3rd pixel electrode;
One second substrate, it has a subtend electrode, wherein this first pixel electrode and this counter electrode have one first overlapping region, this second pixel electrode and this counter electrode and have one second overlapping region, the 3rd pixel electrode and this counter electrode and have triple-overlapped zone, and this first overlapping region is less than this second overlapping region and this triple-overlapped zone; And
One liquid crystal layer is located between this first substrate and this second substrate.
2. liquid crystal indicator as claimed in claim 1, it is characterized in that, this first pixel electrode comprises that one first area of knockout, this second pixel electrode comprise one second area of knockout, the 3rd pixel electrode comprises one the 3rd area of knockout, wherein this counter electrode comprises the 4th area of knockout corresponding to this first pixel electrode, the 5th area of knockout and the 6th area of knockout corresponding to the 3rd pixel electrode corresponding to this second pixel electrode.
3. liquid crystal indicator as claimed in claim 2 is characterized in that, the area of this first area of knockout is greater than the area of this second area of knockout and the area of the 3rd area of knockout.
4. liquid crystal indicator as claimed in claim 2 is characterized in that, the area of the 4th area of knockout is greater than the area of the 5th area of knockout and the area of the 6th area of knockout.
5. liquid crystal indicator as claimed in claim 2 is characterized in that, this first area of knockout comprises at least one the first straight slit district, at least one first horizontal slit area and at least one the first intersection district that is positioned at its confluce; This second area of knockout comprises at least one the second straight slit district, at least one second horizontal slit area and at least one the second intersection district that is positioned at its confluce; The 3rd area of knockout comprises at least one the 3rd straight slit district, at least one the 3rd horizontal slit area and at least one the 3rd intersection district that is positioned at its confluce; The 4th area of knockout comprises the 4th at least one straight slit district, at least one the 4th horizontal slit area and at least one the 4th intersection district that is positioned at its confluce; The 5th area of knockout comprises at least one the 5th straight slit district, at least one the 5th horizontal slit area and at least one the 5th intersection district that is positioned at its confluce; And the 6th area of knockout comprises at least one the 6th straight slit district, at least one the 6th horizontal slit area and at least one the 6th intersection district that is positioned at its confluce.
6. liquid crystal indicator as claimed in claim 5 is characterized in that, this first straight slit district, the first horizontal slit area and the first intersection district are staggered with the 4th straight slit district, the 4th horizontal slit area and the 4th intersection district separately; This second straight slit district, the second horizontal slit area and the second intersection district are staggered with the 5th straight slit district, the 5th horizontal slit area and the 5th intersection district separately; And the 3rd straight slit district, the 3rd horizontal slit area and the 3rd intersection district are staggered with the 6th straight slit district, the 6th horizontal slit area and the 6th intersection district separately.
7. liquid crystal indicator as claimed in claim 6, it is characterized in that, this first hollows out the district and also comprises at least one the first finger-like extension area, from this first straight slit district, the first horizontal slit area, the first intersection district to around extend so that this first hollows out the district and comprises and at least onely be centered close to the first rhombus that described the first intersection district and shape be essentially rhombus and hollow out the district; This second hollows out the district and more comprises at least one the second finger-like extension area, from this second straight slit district, the second horizontal slit area, the second intersection district to around extend so that this second hollows out the district and comprises and at least onely be centered close to the second rhombus that described the second intersection district and shape be essentially rhombus and hollow out the district; And the 3rd hollow out the district and more comprise at least one the 3rd finger-like extension area, from the 3rd straight slit district, the 3rd horizontal slit area, the 3rd intersection district to around extend so that the 3rd hollows out the district and comprises and at least onely be centered close to the Three Diamond that the 3rd intersection district and shape be essentially rhombus and hollow out the district; Wherein this first finger-like extension area, the second finger-like extension area and the 3rd finger-like extension area more comprise finger electrode.
8. liquid crystal indicator as claimed in claim 7, it is characterized in that the side that the side that this first rhombus hollows out the district to the distance in its 4th adjacent intersection district hollows out the district less than this second rhombus a side to distance and the Three Diamond in its 5th adjacent intersection district hollows out the district is to the distance in its 6th adjacent intersection district.
9. liquid crystal indicator as claimed in claim 7, it is characterized in that, the 4th hollows out the district also comprises at least one the 4th finger-like extension area, from the 4th straight slit district, the 4th horizontal slit area, the 4th intersection district to around extend so that the 4th hollows out the district and comprises and at least onely be centered close to the 4th rhombus that described the 4th intersection district and shape be essentially rhombus and hollow out the district; The 5th hollows out the district more comprises at least one the five fingers shape extension area, from the 5th straight slit district, the 5th horizontal slit area, the 5th intersection district to around extend so that the 5th hollows out the district and comprises and at least onely be centered close to the 5th rhombus that described the 5th intersection district and shape be essentially rhombus and hollow out the district; And the 6th hollow out the district and more comprise at least one the 6th finger-like extension area, from described the 6th straight slit district, the 6th horizontal slit area, the 6th intersection district to around extend so that the 6th hollows out the district and comprises and at least onely be centered close to the 6th rhombus that described the 6th intersection district and shape be essentially rhombus and hollow out the district; Wherein the 4th finger-like extension area, the five fingers shape extension area and the 6th finger-like extension area more comprise finger electrode.
10. liquid crystal indicator as claimed in claim 9, it is characterized in that, in wherein above angle was seen, the side that this first rhombus hollows out the district hollows out a side in district to its 4th adjacent rhombus distance hollows out the district less than this second rhombus a side hollowed out the distance of a side in district and a side that this Three Diamond hollows out the district hollows out a side in district to its 6th adjacent rhombus distance to its 5th adjacent rhombus.
11. liquid crystal indicator as claimed in claim 10 is characterized in that, wherein this first rhombus hollows out district, this second rhombus and hollows out district and this Three Diamond to hollow out the area in district all identical.
12. liquid crystal indicator as claimed in claim 10 is characterized in that, the 4th rhombus hollows out district, the 5th rhombus and hollows out district and the 6th rhombus to hollow out the area in district all identical.
13. liquid crystal indicator as claimed in claim 1 is characterized in that, this liquid crystal layer comprises a chirality alloy and is doped in wherein.
14. liquid crystal indicator as claimed in claim 1 is characterized in that, this second overlapping region is less than or equal to this triple-overlapped zone.
15. liquid crystal indicator as claimed in claim 1 is characterized in that, this first pixel electrode is positioned at the blue pixel unit, and the second pixel electrode is positioned at the green pixel unit, and the 3rd pixel electrode is positioned at the red pixel unit.
16. liquid crystal indicator as claimed in claim 15 is characterized in that, the interval between this first pixel electrode and this first substrate is less than the interval between this second pixel electrode and the 3rd pixel electrode and this second substrate.
17. a vertical orientation liquid crystal indicator comprises:
One first substrate, it has one first pixel electrode, one second pixel electrode and one the 3rd pixel electrode;
One second substrate, it has a subtend electrode; And
One liquid crystal layer is located between this first substrate and this second substrate, and wherein the interval between this first pixel electrode and this first substrate is less than the interval between this second pixel electrode and the 3rd pixel electrode and this second substrate;
Wherein this liquid crystal layer comprises a chirality alloy and is doped in wherein.
18. vertical orientation liquid crystal indicator as claimed in claim 17, it is characterized in that, this second substrate also comprises a colored filter, this colored filter comprises a blue color filter corresponding to this first pixel electrode, green color filter and the green color filter corresponding to the 3rd pixel electrode corresponding to this second pixel electrode, and wherein the thickness of this blue color filter greater than the thickness of this green tint colo(u)r filter and this redness colored filter.
19. vertical orientation liquid crystal indicator as claimed in claim 17 is characterized in that, the interval between this second pixel electrode and this second substrate is less than or equal to the interval between the 3rd pixel electrode and this second substrate.
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| CN2012101238198A CN103376601A (en) | 2012-04-25 | 2012-04-25 | Liquid crystal display device |
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Application publication date: 20131030 |