CN101937139B - Color filter base plate and liquid crystal display device - Google Patents
Color filter base plate and liquid crystal display device Download PDFInfo
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- CN101937139B CN101937139B CN 200910157235 CN200910157235A CN101937139B CN 101937139 B CN101937139 B CN 101937139B CN 200910157235 CN200910157235 CN 200910157235 CN 200910157235 A CN200910157235 A CN 200910157235A CN 101937139 B CN101937139 B CN 101937139B
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Abstract
The invention provides a color filter base plate and a liquid crystal display device. The liquid crystal display device comprises a drive element base plate, a color filter base plate and a liquid crystal layer which is arranged between the base plates, wherein the drive element base plate comprises a first transparent base plate, a plurality of switching elements and a plurality of pixel electrodes and is formed on the first transparent base plate, and each switching element is connected to one of the pixel electrodes; the color filter base plate is used for defining a plurality of pixel areas; each pixel area is suitable for a position corresponding to one of the pixel electrodes and comprises a second transparent base plate, a first transparent conducting layer, a second transparent conducting layer and a dielectric layer; the first transparent conducting layer is positioned between the second transparent base plate and the second transparent conducting layer; the dielectric layer is positioned between the first transparent conducting layer and the second transparent conducting layer; and at least one opening is defined by the second transparent conducting layer in each pixel area. A method and the device provided by the invention can generate an area of liquid crystal molecules of at least two liquid crystal layers in different inclining directions between the pixel areas and the pixel electrodes.
Description
Technical field
The invention relates to a kind of colored filter substrate and liquid crystal display, especially about producing colored filter substrate and the liquid crystal indicator of two kinds of different transmittances in a kind of pixel.
Background technology
Fig. 1 is the schematic diagram of the part section of available liquid crystal display device.As shown in Figure 1, liquid crystal display 90 comprises toward each other filter sheet base plate 912 and an active device substrate 914, and sandwiched one liquid crystal layer 916 between two substrates.Liquid crystal layer 916 adopts negative dielectric anisotropy (negative dielectric anisotropy) liquid crystal material, makes that liquid crystal molecule is vertical orientation (vertical alignment) when not applying voltage.On the transparency carrier 928 of active device substrate 914, be formed with switching device (not shown), pixel electrode 922 such as thin film transistor (TFT) (TFT) and so on.Be formed with colored filter 930 on the transparency carrier 926 of filter sheet base plate 912 and and be formed with common electrode 924 on the colored filter 930.Colored filter 930 comprises the black matrix layer 934 of shading and optical filtering mark district 932.
But the liquid crystal indicator of existing employing vertical orientation structure has colour cast (color washout) phenomenon when watching with great visual angle, and for example when watching with great visual angle, the colour of skin can be partial to comparatively light blue or brilliant white.General solution can be separated into several zones with a pixel, recycling double-gate line (dual gate line), Double Data line (dual data line, T-T type), common electric voltage swings (common voltage swing), thin film transistor (TFT) dividing potential drop and capacitive coupling (capacitance coupling, C-C type) etc. technology reduces this color offset phenomenon.But in these a little solutions its shortcoming is arranged, for example the Double Data line all needs extra integrated circuit (IC) and element with swing common electric voltage technology, increases processing procedure time and material cost.And the technology such as thin film transistor (TFT) dividing potential drop and capacitive coupling, although do not need extra IC can solve color offset phenomenon, can be because of the extra thin film transistor (TFT) that increases, and reduce aperture opening ratio.In addition, the capacitive coupling technology can form from being coupled electric capacity (self-coupled capacitance) because of (floating) electrode that floats, and causes serious ghost (image-sticking) phenomenon.
In addition, during with finger touches available liquid crystal display device, disarrayed because of mesomorphic state and to be produced white or black embossing (being finger print mura) phenomenon.It is longer that the mesomorphic state of disarraying in the general available liquid crystal display device is returned to reaction time of original para-electric field direction tilt state so that eye-observation to the embossing phenomenon.Solution commonly used is for the density of increase clearance material (photo spacer) or in electrically conducting transparent (Pattern ITO) electrode that forms the tool patterns at active device substrate 914, but the former can cause Liquid crystal pour slower, increase time cost, the latter then is that aperture opening ratio reduces.
Summary of the invention
Therefore, the purpose of one embodiment of the invention is providing a kind of colored filter substrate and liquid crystal indicator, its can slow down when watching with great visual angle the color offset phenomenon discovered.The purpose of one embodiment is providing a kind of colored filter substrate and liquid crystal indicator, and it can slow down the embossing phenomenon.The purpose of one embodiment is providing a kind of colored filter substrate and liquid crystal indicator, and it can slow down colour cast or embossing phenomenon, and the while aperture opening ratio is large and cost is lower.
Provide a kind of liquid crystal indicator according to one embodiment of the invention, it comprises an active device substrate, a colored filter substrate and liquid crystal layer.Active device substrate comprises one first transparency carrier; And a plurality of switching devices and a plurality of pixel electrode, these a little switching devices and pixel electrode are formed on the first transparency carrier and each switching device is electrically connected at this a little pixel electrode one.Liquid crystal layer is located between colored filter substrate and active device substrate.Colored filter substrate defines a plurality of pixel regions, each pixel region is suitable for corresponding these a little pixel electrode one in position, and colored filter substrate comprises transparency carrier, one first transparency conducting layer, one second transparency conducting layer and a dielectric layer of a colored filter substrate.The first transparency conducting layer is positioned at transparency carrier and the second electrically conducting transparent interlayer of colored filter substrate, dielectric layer is positioned at the first transparency conducting layer and the second electrically conducting transparent interlayer, described the first transparency conducting layer in each described pixel region defines at least one the first transparency conducting layer opening, and the second transparency conducting layer in each pixel region defines at least one the second transparency conducting layer opening.
Provide a kind of liquid crystal indicator according to one embodiment of the invention, dielectric layer can be a chromatic filter layer, and preferably the first transparency conducting layer is located between the transparency carrier and chromatic filter layer of colored filter substrate.And can be a hyaline layer and colored filter substrate more comprises a chromatic filter layer in another embodiment dielectric layer, preferably chromatic filter layer is located between the transparency carrier of the first transparency conducting layer and colored filter substrate.A plurality of optical filtering marks district that chromatic filter layer can comprise a black matrix layer and be defined by black matrix layer, and corresponding these a little pixel region one of each optical filtering mark zone position.
Provide a kind of liquid crystal indicator according to one embodiment of the invention, colored filter substrate also defines a non-display area, and non-display area comprises a through hole, and the first transparency conducting layer and the second transparency conducting layer are electrically connected by through hole.Preferably non-display area is positioned at the outside of colored filter substrate and surrounds this a little pixel regions.
According to the liquid crystal indicator of one embodiment of the invention, can between pixel region and pixel electrode, produce the zone of the different vergence directions of liquid crystal molecule tool of at least two liquid crystal layers.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of the part section of available liquid crystal display device;
Fig. 2 is the schematic diagram according to the part section of the liquid crystal indicator of one embodiment of the invention;
Fig. 3 is according to the floor map that consists of a dot structure on the active device substrate of one embodiment of the invention liquid crystal indicator;
Fig. 4 is according to the floor map that consists of a pixel region on the filter sheet base plate of one embodiment of the invention liquid crystal indicator.
Fig. 5 is according to the floor map that consists of two adjacent pixel regions on the filter sheet base plate of one embodiment of the invention liquid crystal indicator;
Fig. 6 is according to the floor map that consists of a pixel region on the filter sheet base plate of one embodiment of the invention liquid crystal indicator;
Fig. 7 is the schematic diagram according to the part section of the liquid crystal indicator of one embodiment of the invention;
Fig. 8 is the floor map according to the filter sheet base plate of one embodiment of the invention liquid crystal indicator;
Fig. 9 is according to the electric field of a section of a pixel in one embodiment of the invention liquid crystal indicator and penetrance curve map;
Figure 10 is according to the electric field of a section of a pixel in the available liquid crystal display device and penetrance curve map;
Figure 11 A to Figure 11 C is according to voltage and the penetrance curve map of a pixel in one embodiment of the invention liquid crystal indicator;
Figure 12 is according to gray scale and the penetrance curve map of a pixel in one embodiment of the invention liquid crystal indicator;
The value of chromatism of the forward azimuth of Figure 13 A demonstration available liquid crystal display device and the curve map at visual angle;
Figure 13 B shows according to the value of chromatism of the forward azimuth of one embodiment of the invention liquid crystal indicator and the curve map at visual angle;
Figure 14 A shows the azimuthal value of chromatism of 45-135 degree of available liquid crystal display device and the curve map at visual angle;
Figure 14 B shows according to the azimuthal value of chromatism of 45-135 degree of one embodiment of the invention liquid crystal indicator and the curve map at visual angle;
Figure 15 is the schematic diagram according to the part section of the liquid crystal indicator of one embodiment of the invention;
Figure 16 is according to the electric field of a section of a pixel in Figure 15 liquid crystal indicator and penetrance curve map;
Figure 17 A and Figure 17 B are according to the voltage of a pixel in one embodiment of the invention liquid crystal indicator and penetrance curve map.
Drawing reference numeral
10 liquid crystal indicators, 12 filter sheet base plates
14 active device substrates, 16 liquid crystal layers
20 pixel regions, 21 second transparency carriers
23 chromatic filter layers, 241 first transparency conducting layers
242 second transparency conducting layers, 243 openings
245 dielectric layers, 32 black matrix layer
38,381,382,383 zones, 34 optical filtering mark districts
40 pixel regions, 41 first transparency carriers
42 switching devices, 44 sweep traces
46 data lines, 48 pixel electrodes
712 colored filter substrates, 721 non-display areas
722 viewing areas, 723 through holes
821,822,823 pixel regions 841,851,861 first openings
842,852,862 second opening 90 liquid crystal indicators
912 filter sheet base plates, 914 active device substrates
916 liquid crystal layers, 922 pixel electrodes
924 common electrodes, 926 transparency carriers
928 transparency carriers, 930 colored filters
932 optical filtering mark districts, 934 black matrix layer
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
In this, must note the term of " the A layer is formed on the B layer " in this instructions, be not defined as the aspect that the A layer directly pastes contact B layer surface, for example A layer and B layer centre still the interval other laminated also be this term institute covering scope.
Fig. 2 is the schematic diagram according to the part section of the liquid crystal indicator of one embodiment of the invention.As shown in Figure 2, liquid crystal indicator 10 comprises toward each other filter sheet base plate 12 and an active device substrate 14, and sandwiched one liquid crystal layer 16 between two substrates.Liquid crystal layer 16 adopts negative dielectric anisotropy liquid crystal material, makes that liquid crystal molecule is vertical orientation when not applying voltage.In addition, can add in the liquid crystal layer 16 to help and revolve adulterant (chiral dopant), to accelerate the liquid crystal rotation and to reduce misorientation defective (disclination).
Fig. 3 is according to the floor map that consists of a dot structure on the active device substrate of one embodiment of the invention liquid crystal indicator.The switching device of the present embodiment can be a N-shaped amorphous silicon film transistor (n-type a-Si TFT) 42, as shown in Figures 2 and 3, form the sweep trace (scan line) 44 that complex trace is parallel to each other and the data line (data line) 46 that is parallel to each other on the first transparency carrier 41 of active device substrate 14, and two adjacent sweep traces 44 are orthogonal to two adjacent data lines 46 and corral goes out a pixel region 40.Pixel electrode 48 is distributed in this pixel region 40, and thin film transistor (TFT) 42 is electrically connected pixel electrode 48 and is formed at sweep trace 44 and place, data line 46 point of crossing.Pixel electrode 48 can be by tin indium oxide (Indium Tin Oxide; ITO) or indium-zinc oxide (Indium Zinc Oxide; IZO) nesa coating consists of.
Fig. 4 is according to the floor map that consists of a pixel region on the filter sheet base plate of one embodiment of the invention liquid crystal indicator.Such as Fig. 2 and shown in Figure 4, filter sheet base plate 12 defines a plurality of pixel regions 20, those pixel electrode 48 one of the corresponding active device substrate 14 in each pixel region 20 position.Form chromatic filter layer 23 on the second transparency carrier 21 of filter sheet base plate 12.A plurality of optical filtering marks district (filter trace) 34 that chromatic filter layer 23 comprises a black matrix layer 32 and defined by black matrix layer 32, and corresponding those pixel region 20 one in each 34 position, optical filtering mark district.Optical filtering mark district 34 includes a zone 38, when filter sheet base plate 12 and active device substrate 14 are combined into liquid crystal indicator 20, the corresponding active device substrate 14 in regional 38 positions be the N-shaped amorphous silicon film transistor 42 of switching device.Each optical filtering mark district for example can be made of the pigment of different colours, and the mark district 34 that therefore for example filters can be redness filter mark district, green optical filtering mark district, blue optical filtering mark district.Two 34 in optical filtering mark districts are provided with provides the black matrix layer of interception (black matrix; BM) 32.In the present embodiment, the first transparency carrier 41 and the second transparency carrier 21 can be a glass substrate, plastic substrate or plastic cement mantle.
In detail, the diagrammatic cross-section of the active device substrate 14 of Fig. 2 is the sectional view that A-A ' the line crosscut along Fig. 3 gets, the diagrammatic cross-section of the filter sheet base plate 12 of Fig. 2 along B-B ' the line crosscut of Fig. 4 and sectional view.Colored filter substrate 12 defines a plurality of pixel regions 20, corresponding those pixel electrode 48 one in each pixel region 20 position.As shown in Figure 2, colored filter substrate 12 comprises one second transparency carrier 21, one first transparency conducting layer 241, one second transparency conducting layer 242 and and is the chromatic filter layer 23 of dielectric layer.The first transparency conducting layer 241 is positioned at 242 of the second transparency carrier 21 and the second transparency conducting layers, chromatic filter layer 23 is positioned at 242 of the first transparency conducting layer 241 and the second transparency conducting layers, and the corresponding pixel region 20 in 34 positions, an optical filtering mark district of chromatic filter layer 23.Preferably, the first transparency conducting layer 241 is formed on the second transparency carrier 21, and chromatic filter layer 23 is formed on the first transparency conducting layer 241, and the second transparency conducting layer 242 is formed on the chromatic filter layer 23.
In the present embodiment, be provided with one at the first transparency conducting layer 241 and 242 of the second transparency conducting layers and be the chromatic filter layer 23 of dielectric layer, therefore can be formed with electric capacity in this two transparency conducting layer 241 and 242.Also define at least one opening 243 in the second transparency conducting layer 242 in addition.Therefore can be divided into two zones in pixel region 20 and 48 of pixel electrodes: first part that is formed with opening 243 of pixel region 20; And second part that does not form opening 243 of pixel region 20.Because the first part and the second local formed electric capacity out of the ordinary are different, therefore second of the first part of pixel region 20 and pixel region 20 the part and 48 electric fields that produce out of the ordinary of pixel electrode are different, and can make the different vergence directions of liquid crystal molecule tool of liquid crystal layer 16 in this two zone.And the different vergence directions of liquid crystal molecule tool can form different light transmittances, so two zones can have different light transmittances.Therefore can effectively slow down colour cast (color washout) phenomenon.During in addition with the finger touches liquid crystal indicator, disarrayed because of mesomorphic state and to be produced the embossing phenomenon, because pixel region 20 can form two kinds of different electric fields, make liquid crystal can return back to previous status, and can slow down the embossing phenomenon.
The shape of these a little openings 243 is not limited it can be circle, rectangle, strip or irregular shape.The position of these a little openings 243 is not also limited, although opening shown in Figure 4 243 is positioned at the upside of pixel region 20, can also be positioned at downside or the centre of pixel region 20 in an embodiment.The quantity of opening 243 is not also limited, and pixel region 20 can also comprise most the different local openings 243 that are positioned at pixel region 20.Pixel region 20 can also or be divided into up and down zone, for example embodiment of following Fig. 5 for a zone.
Fig. 5 is according to the floor map that consists of two adjacent pixel regions on the filter sheet base plate of one embodiment of the invention liquid crystal indicator.Fig. 6 is according to the floor map that consists of a pixel region on the filter sheet base plate of one embodiment of the invention liquid crystal indicator.The two adjacent pixel regions 821 of Fig. 5 and 822 and the pixel region 823 of Fig. 6 all similar in appearance to the pixel region 20 of Fig. 4, therefore, identical element uses identical symbol and omits its related description in these a little pixel regions.Please refer to Fig. 5 and Fig. 6, pixel region 821,822 and 823 comprises respectively a zone 381,382 and 383 and respectively these a little pixel regions is divided into upside and downside, and a switching element of the corresponding active device substrate in position can be distinguished in zone 381,382 and 383.
As shown in Figure 5, the second transparency conducting layer in the pixel region 821 and 822 defines respectively first opening 841 and 851 that is positioned at zone 381 and 382 upside; And second opening 842 and 852 that is positioned at zone 381 and 382 downside.The area of the second opening 842 (being shaped as rectangle) is different from the area of the first opening 841 (being shaped as circle).Preferably, pixel region 821 and 822 is adjacent, and the area (or shape) of the first opening 841 of pixel region 821 is same as the area (or shape) of the second opening 852 of pixel region 822; And the area (or shape) of the second opening 842 of pixel region 821 is same as the area (or shape) of the first opening 851 of pixel region 822.The area (or shape) that makes the opening in four above-mentioned zones of two adjacent pixel regions for up and down staggered or about be crisscross arranged, avoid when two light transmittance in four above-mentioned zones differs larger, and produce obvious brightness disproportionation phenomenon.As shown in Figure 6, the upside of pixel region 823 and downside comprise respectively first and two openings 861 and 862 of a plurality of strips.First and two openings 861 and 862 long axis direction are different, and preferably, the long axis direction of these a little openings is mirror each other along zone 383, and design can slow down the brightness disproportionation phenomenon according to this.Will be appreciated that, although in the present embodiment pixel is divided into upper and lower sides, this non-the present invention limits, and can also pixel be divided into upper and lower sides in an embodiment.
Fig. 7 is the schematic diagram according to the part section of the liquid crystal indicator of one embodiment of the invention.The liquid crystal indicator 10 ' of Fig. 7 and colored filter substrate 12 ' are similar in appearance to liquid crystal indicator 10 and the colored filter substrate 12 of Fig. 2, therefore, identical element uses identical symbol and omits its related description in these a little liquid crystal indicators and the colored filter substrate.Below only be illustrated for these a little liquid crystal indicators and the different part of colored filter substrate.As shown in Figure 7, the colored filter substrate 12 ' of liquid crystal indicator 10 ' is different from the colored filter substrate 12 of liquid crystal indicator 10.And the dielectric layer of 242 of the first transparency conducting layer 241 of colored filter substrate 12 ' and the second transparency conducting layers can be for being different from a hyaline layer of chromatic filter layer, and colored filter substrate 12 ' also comprises a chromatic filter layer 23.In detail, colored filter substrate 12 ' comprises one second transparency carrier 21, one first transparency conducting layer 241, one second transparency conducting layer 242, a dielectric layer 245 and a chromatic filter layer 23.The first transparency conducting layer 241 is positioned at 242 of the second transparency carrier 21 and the second transparency conducting layers, dielectric layer 245 is positioned at 242 of the first transparency conducting layer 241 and the second transparency conducting layers, chromatic filter layer 23 is located at 21 of the first transparency conducting layer 241 and the second transparency carriers, and the corresponding pixel region 20 in 34 positions, an optical filtering mark district of chromatic filter layer 23.Preferably, chromatic filter layer 23 is formed on the second transparency carrier 21, and the first transparency conducting layer 241 is formed on the chromatic filter layer 23, and dielectric layer 245 is formed at the first transparency conducting layer 241, the second transparency conducting layers 242 and is formed on the dielectric layer 245.
Fig. 8 is the floor map according to the filter sheet base plate of one embodiment of the invention liquid crystal indicator.The colored filter substrate 712 of Fig. 8 is similar in appearance to the colored filter substrate 12 of Fig. 2, and therefore, identical element uses identical symbol and omits its related description in these a little colored filter substrates.Colored filter substrate 712 defines a viewing area 722 and a non-display area 721, comprises pixel region 20 in the viewing area 722.The zone of the not display frame of non-display area 721 corresponding liquid crystal indicators 10, and non-display area 721 defines a through hole 723, uses the first transparency conducting layer 241 and the second transparency conducting layer 242 that make colored filter substrate 712 and is electrically connected by through hole 723.So more can not affect the display quality of liquid crystal indicator 10 at non-display area 721 because of through hole 723.According to the present embodiment, only need the first transparency conducting layer 241 and the second transparency conducting layer 242 one are applied a common electric voltage, and another transparency conducting layer can receive this common electric voltage by this through hole 723, therefore the present embodiment increases by a transparency conducting layer, the elements such as TFT and IC need be do not increased, the zone of the different vergence directions of liquid crystal molecule tool of at least two liquid crystal layers of 48 generations of pixel region 20 and pixel electrode 16 can be made.Compared to prior art, the colored filter substrate of the present embodiment and the aperture opening ratio of liquid crystal indicator are large and cost is lower, and can slow down at least one of color offset phenomenon and embossing phenomenon.In addition, in the present embodiment, non-display area 721 is positioned at the outside of colored filter substrate 712 and surrounds those pixel regions 20.
Pixel to the liquid crystal indicator of one embodiment of the invention, carry out simulating of electric field and penetrance curve map, voltage and penetrance curve map (V-T curve) and gray scale and penetrance curve map (gamma curve), and compared with the prior art.Fig. 9 is according to the electric field of a section of a pixel in one embodiment of the invention liquid crystal indicator and penetrance curve map.Such as Fig. 2 and shown in Figure 4, curve map shown in Figure 9 is circular for making opening, and the ratio (section aperture efficiency) of the width W of the opening 243 of this section and the width X in optical filtering mark district 34 is 50% situation Imitating acquired results.Figure 10 is according to the electric field of a section of a pixel in the available liquid crystal display device and penetrance curve map.As shown in Figure 9, compare and prior art, the pixel of one embodiment of the invention can produce penetrance T1 and the T2 of two kinds of main differences.
Figure 11 A to Figure 11 C is according to the voltage of a pixel in one embodiment of the invention liquid crystal indicator and penetrance curve map.In detail, its section aperture efficiency of Fig. 9 embodiment is the curve of 66% (curve I66), 50% (curve I50), 33% (curve I33), 17% (curve I17), the curve (curve T40) at prior art 40 degree visual angles and the curve (curve T0) at prior art 0 degree visual angle in the situation at Figure 11 A demonstration 40 degree visual angles.Its section aperture efficiency of Fig. 9 embodiment is the curve of 66% (curve L66), 50% (curve L50), 33% (curve L33), 17% (curve L17), the curve (curve T60) at prior art 60 degree visual angles and the curve (curve T0) at prior art 0 degree visual angle in the situation at 11B figure demonstration 60 degree visual angles.Figure 11 C shows that its section aperture efficiency of Fig. 9 embodiment is that 50% situation downwards angle of visibility is that curve, the prior art visual angles of 0 degree (curve A 0), 45 degree (curve A 45), 60 degree (curve A 60) are the curve of 0 degree (curve T0), 45 degree (curve T45), 60 degree (curve T60).By Figure 11 A to Figure 11 C as can be known, in the situation that a same view angle is condition, each curve of one embodiment of the invention gained compared to each curve of prior art gained, more connects the existing curve of knowing technology 0 degree visual angle, therefore can slow down color offset phenomenon with great visual angle.
Figure 12 is according to the gray scale of a pixel in one embodiment of the invention liquid crystal indicator and penetrance curve map.Figure 12 show its section aperture efficiency of Fig. 9 embodiment be 50% for the situation downwards angle of visibility of condition be 0 the degree (curve GA0), 45 the degree (curve GA45), 60 the degree (curve GA60) curve, known techniques visual angles be 0 the degree (curve GT0), 45 the degree (curve GT45), 60 the degree (curve GT60) curve.As shown in Figure 12, each curve of one embodiment of the invention gained compared to each curve of prior art gained, more near curve and the Gamma2.2 curve at prior art 0 degree visual angle, therefore can slow down color offset phenomenon with great visual angle.Curve GA0, GT0 and Gamma2.2 approach and overlap among this figure.Therefore in sum, its section aperture efficiency of one embodiment of the invention preferably can be 66%～50%, 50%～33% and 33%～17%, that is can be 66%～17%.
The value of chromatism (Delta u ' v ') of the forward azimuth of Figure 13 A demonstration available liquid crystal display device and the curve map at visual angle (viewing angle).Figure 13 B shows according to the value of chromatism of the forward azimuth of one embodiment of the invention liquid crystal indicator and the curve map at visual angle.Please refer to 13A and 13B figure, curve R12H-6H, B12H-6H and G12H-6H represent respectively ruddiness, blue light and green glow in the position angle 12 and 6 o'clock direction curve; Curve R9H-3H, B9H-3H and G9H-3H represent respectively ruddiness, blue light and green glow in the position angle 9 and 3 o'clock direction curve.Curve R12H-6H, G12H-6H and G9H-3H are positioned at value of chromatism below 0.02 and roughly overlap in Figure 13 A, indicate especially for asking concisely again.Curve R12H-6H, R9H-3H, G12H-6H and G9H-3H are positioned at value of chromatism below 0.02 and roughly overlap in Figure 13 B, indicate especially for asking concisely again.Human eye can't identification less than 0.02 the time when value of chromatism (Delta u ' v ').
Shown in Figure 13 A and Figure 13 B, according to the value of chromatism of each curve of prior art all greater than each curve of one embodiment of the invention.In addition, the curve B 12H-6H of the blue light of available liquid crystal display device and B9H-3H are in descending with great visual angle most value of chromatism all greater than 0.02; With respect to this, according to curve B 12H-6H and the B9H-3H of the blue light of one embodiment of the invention liquid crystal indicator, in lower haply value of chromatism with great visual angle all less than 0.02.
Figure 14 A manifests the curve map that the azimuthal value of chromatism of 45-135 degree (Delta u ' v ') of knowing liquid crystal indicator and visual angle (viewing angle) are arranged.Figure 14 B shows according to the azimuthal value of chromatism of 45-135 degree of one embodiment of the invention liquid crystal indicator and the curve map at visual angle.Please refer to Figure 14 A and Figure 14 B, curve R135-315, B135-315 and G135-315 represent respectively ruddiness, blue light and green glow in the position angle 135 the degree and 315 the degree directions curves; Curve R225-45, B225-45 and G225-45 represent respectively ruddiness, blue light and green glow in the position angle 225 the degree and 45 the degree directions curves.The most of system of curve G225-45 and G135-315 is positioned at value of chromatism below 0.02 in Figure 14 A, does not indicate especially for asking concisely again.The value of chromatism of curve G225-45, G135-315, R225-45 and R135-315 is positioned at below 0.02 and roughly overlaps in Figure 14 B, does not indicate especially for asking concisely again.
Shown in Figure 14 A and Figure 14 B, according to the value of chromatism of each curve of prior art all greater than each curve of one embodiment of the invention.In addition, each curve of the blue light of available liquid crystal display device and ruddiness is in descending with great visual angle most value of chromatism all greater than 0.02; With respect to this, significantly dwindle according to each curve of the blue light of one embodiment of the invention liquid crystal indicator; And each curve of ruddiness in lower haply value of chromatism with great visual angle all less than 0.02.Therefore can prove that one embodiment of the invention liquid crystal indicator can effectively slow down color offset phenomenon.
Table one shows one embodiment of the invention liquid crystal indicator and available liquid crystal display device, and contrast is 50 and 100 and the relation at visual angle under all directions angle.Please refer to such as following table one, according to the liquid crystal indicator of one embodiment of the invention, be respectively 45,135,225 and 315 when spending in deflection, contrast still is respectively 35,35,35 and 36 greater than 50 maximum visual angle.Those maximum visual angles are respectively greater than the maximum visual angle 32,29,32 and 28 of the correspondence of available liquid crystal display device.In addition, according to the liquid crystal indicator of one embodiment of the invention, be respectively for 6,12,3 and 9 o'clock during direction in deflection, contrast still is respectively 44,52,58 and 55 greater than 100 maximum visual angle.Those maximum visual angles are respectively greater than the maximum visual angle 32,29,32 and 28 of the correspondence of available liquid crystal display device.Therefore, also can reach the effect that the visual angle is extended out according to one embodiment of the invention.Obvious effect is particularly arranged when forward azimuth.
Table one
Figure 15 is the schematic diagram according to the part section of the liquid crystal indicator of one embodiment of the invention.The liquid crystal indicator 10a of Figure 15 and colored filter substrate 12a are similar in appearance to liquid crystal indicator 10 and the colored filter substrate 12 of Fig. 2, therefore, identical element uses identical symbol and omits its related description in these a little liquid crystal indicators and the colored filter substrate.Below only be illustrated for the different part of two colored filter substrates.In the present embodiment, the width that the first transparency conducting layer 241a of colored filter substrate 12a also defines the opening 244 of an opening 244 and this section is Y.And preferably opening 244 positions are corresponding to the singular point in the electric field (Singular Point).The inventor carries out embossing phenomenon when experiment and finds, can slow down significantly the embossing phenomenon according to the liquid crystal indicator 10 of Fig. 2 embodiment when voltage is 0V to 4V; But when when voltage is 4V to 5V, being 0V to 4V compared to voltage to slow down degree less obvious.And according to the liquid crystal indicator 10a of Figure 15 embodiment, compared to liquid crystal indicator 10, in voltage be 4V to 5V to slow down degree more obvious, therefore can further slow down the embossing phenomenon.
Figure 16 is according to the electric field of a section of a pixel in Figure 15 liquid crystal indicator and penetrance curve map.Figure 16 is Y: W: X=10: simulate resulting result in 40: 60 the situation.The situation of Fig. 9 during compared to Y=0, the present embodiment are that zero zone is broad in electric field, that is the regional SP of singular point (Singular Point).Therefore, when finger touches liquid crystal indicator 10a, singular point zone SP more can be because this touching produce skew, therefore can further effectively slow down the embossing phenomenon.
Figure 17 A and Figure 17 B are the voltage (Voltage) and penetrance (T%) curve map according to a pixel in one embodiment of the invention liquid crystal indicator.In detail, its section aperture efficiency of Figure 15 embodiment is Y: W: X=4 in the situation at 17A figure demonstration 45 degree visual angles: 30: 60 (curve VA45Y4), Y: W: X=10: the curve (curve T45) at the curve of 40: 60 (curve VA45Y10) and prior art 45 degree visual angles.Its section aperture efficiency of Figure 15 embodiment is Y: W: X=4 in the situation at Figure 17 B demonstration 60 degree visual angles: 30: 60 (curve VA60Y4), Y: W: X=10: the curve (curve T60) at the curve of 40: 60 (curve VA60Y10) and prior art 60 degree visual angles.
Please refer to Figure 17 A and Figure 17 B, the phenomenon that gray-scale inversion all can occur according to curve T45 and the T60 of prior art when voltage is 3.5V, but according to each curve of the present embodiment then without the phenomenon of GTG counter-rotating.By Figure 17 A and Figure 17 B as can be known, in the situation that a same view angle is condition, each curve of the present embodiment gained compared to each curve of technology gained, more near the curve of positive visual angle (Gamma 2.2), therefore can slow down color offset phenomenon with great visual angle.
According to the present embodiment liquid crystal indicator 10a, can be by profile control aperture efficiency Y: W: the ratio between X be come deisgn product, increases the parameter of a Y compared to Fig. 2 liquid crystal indicator 10, can more easily improve embossing phenomenon in various degree.The shape of those perforates is understood distribution and the symmetry thereof of range of influence electric field in addition, and therefore, preferably the shape of those perforates has symmetry.Because when the width Y of opening 244 is healed when large, the light-permeable district of pixel region 20 is less, therefore can now look like and the embossing phenomenon according to product colour cast in various degree when design, to section aperture efficiency Y: the parameters such as the thickness of W: X, dielectric layer and hole shape carry out optimized adjustment.In addition, the first transparency conducting layer 241 in the colored filter substrate 12 ' of Fig. 7 embodiment liquid crystal indicator 10 ' can also also define an opening, and its effect is same as above-described embodiment, therefore omits its related description.
The above only is illustrative, but not is restricted person.Anyly do not break away from spirit of the present invention and category, and to its equivalent modifications of carrying out or change, all should be contained in claims scope, but not be defined in above-described embodiment.
Claims (8)
1. a liquid crystal indicator is characterized in that, described liquid crystal indicator comprises:
One active device substrate comprises:
One first transparency carrier;
A plurality of switching devices and a plurality of pixel electrode are formed on described the first transparency carrier and each described switching device is electrically connected at described these pixel electrode one;
One colored filter substrate defines a plurality of pixel regions, and each described pixel region is suitable for corresponding described these pixel electrode one in position; And
One liquid crystal layer is located between described colored filter substrate and described active device substrate,
Wherein said colored filter substrate comprises one second transparency carrier, one first transparency conducting layer, one second transparency conducting layer and a dielectric layer, and described the first transparency conducting layer is positioned at described the second transparency carrier and described the second electrically conducting transparent interlayer, described dielectric layer is positioned at described the first transparency conducting layer and described the second electrically conducting transparent interlayer, described the first transparency conducting layer in each described pixel region defines at least one the first transparency conducting layer opening, and described the second transparency conducting layer in each described pixel region defines at least one the second transparency conducting layer opening, uses the zone of the different vergence directions of liquid crystal molecule tool that produce at least two described liquid crystal layers between described pixel region and described pixel electrode.
2. liquid crystal indicator as claimed in claim 1, it is characterized in that, described dielectric layer is a chromatic filter layer, a plurality of optical filtering marks district that described chromatic filter layer comprises a black matrix layer and defined by described black matrix layer, and corresponding described these pixel region one of each described optical filtering mark zone position.
3. liquid crystal indicator as claimed in claim 2 is characterized in that, described the first transparency conducting layer is located between described the second transparency carrier and the described chromatic filter layer.
4. liquid crystal indicator as claimed in claim 3 is characterized in that, the shape of described the second transparency conducting layer opening is circle, rectangle or irregular shape.
5. liquid crystal indicator as claimed in claim 3 is characterized in that, described these the second transparency conducting layer openings are the opening of a plurality of strips arranged side by side.
6. liquid crystal indicator as claimed in claim 3 is characterized in that, described the second transparency conducting layer opening comprises: one first opening and one second opening, and the area of described the second opening is different from the area of described the first opening.
7. a liquid crystal indicator is characterized in that, described liquid crystal indicator comprises:
One active device substrate comprises:
One first transparency carrier;
A plurality of switching devices and a plurality of pixel electrode are formed on described the first transparency carrier and each described switching device is electrically connected at described these pixel electrode one;
One colored filter substrate defines a plurality of pixel regions, and each described pixel region is suitable for corresponding described these pixel electrode one in position; And
One liquid crystal layer is located between described colored filter substrate and described active device substrate,
Wherein said colored filter substrate comprises one second transparency carrier, one first transparency conducting layer, one second transparency conducting layer and a dielectric layer, and described the first transparency conducting layer is positioned at described the second transparency carrier and described the second electrically conducting transparent interlayer, described dielectric layer is positioned at described the first transparency conducting layer and described the second electrically conducting transparent interlayer, described the second transparency conducting layer in each described pixel region defines at least one opening, use the zone of the different vergence directions of liquid crystal molecule tool that between described pixel region and described pixel electrode, produce at least two described liquid crystal layers, and described colored filter substrate also defines a non-display area, described non-display area comprises a through hole, and described the first transparency conducting layer and described the second transparency conducting layer are electrically connected by described through hole.
8. a liquid crystal indicator is characterized in that, described liquid crystal indicator comprises:
One active device substrate comprises:
One first transparency carrier;
A plurality of switching devices and a plurality of pixel electrode are formed on described the first transparency carrier and each described switching device is electrically connected at described these pixel electrode one;
One colored filter substrate defines a plurality of pixel regions, and each described pixel region is suitable for corresponding described these pixel electrode one in position; And
One liquid crystal layer is located between described colored filter substrate and described active device substrate,
Wherein said colored filter substrate comprises one second transparency carrier, one first transparency conducting layer, one second transparency conducting layer, one dielectric layer, an and chromatic filter layer, a plurality of optical filtering marks district that described chromatic filter layer comprises a black matrix layer and defined by described black matrix layer, and corresponding described these pixel region one of each described optical filtering mark zone position, described the first transparency conducting layer is positioned at described the second transparency carrier and described the second electrically conducting transparent interlayer, described dielectric layer is positioned at described the first transparency conducting layer and described the second electrically conducting transparent interlayer, described the second transparency conducting layer in each described pixel region defines at least one opening, uses the zone of the different vergence directions of liquid crystal molecule tool that produce at least two described liquid crystal layers between described pixel region and described pixel electrode.
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| CN 200910157235 CN101937139B (en) | 2009-07-01 | 2009-07-01 | Color filter base plate and liquid crystal display device |
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| CN 200910157235 CN101937139B (en) | 2009-07-01 | 2009-07-01 | Color filter base plate and liquid crystal display device |
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| CN101937139B true CN101937139B (en) | 2013-01-09 |
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| CN101738779B (en) * | 2008-11-04 | 2011-09-28 | 胜华科技股份有限公司 | Liquid crystal display and color tablet filter substrate thereof |
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| CN101738779B (en) * | 2008-11-04 | 2011-09-28 | 胜华科技股份有限公司 | Liquid crystal display and color tablet filter substrate thereof |
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