CN101750732B - Colored electroweting type display device - Google Patents
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- CN101750732B CN101750732B CN2008101857308A CN200810185730A CN101750732B CN 101750732 B CN101750732 B CN 101750732B CN 2008101857308 A CN2008101857308 A CN 2008101857308A CN 200810185730 A CN200810185730 A CN 200810185730A CN 101750732 B CN101750732 B CN 101750732B
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Abstract
The invention relates to a colored electroweting type display device comprising a first substrate and a second substrate which are oppositely arranged; and a polar solution layer and a colored non-polar solution layer are clamped between the first substrate and the second substrate. A first transparent electrode layer is arranged on the first substrate; a second transparent electrode layer is arranged on the second substrate; and a hydrophilic isolation structure is arranged on the second substrate so as to define a plurality of sub pixels. The colored electroweting type display device comprises an array formed by a plurality of pixels; and each pixel comprises a plurality of primitive color sub pixels. Each sub pixel corresponds to one non-polar solution layer in the different colors from the sub pixel; the non-polar solution layers in different colors are isolated from each other; and the colors of the non-polar solution layers in adjacent sub pixels are different.
Description
Technical field
The invention relates to a kind of display equipment, be particularly to a kind of colored electroweting type display device.
Background technology
The principle of Electrowetting display (Electrowetting Display) is to utilize wetting (Electrowetting) phenomenon of electricity or electrochemical kapillary (Electrocapillary) phenomenon.When fluid receives electric field action and changes the surface free energy (Free Surface Energy) of fluid, make the fluid distribution area change.
United States Patent (USP) US 6; Disclose a kind of Electrowetting display structure for 967, No. 763, utilize polar liquid to receive electric field electricity wetting (Electrowetting) affine; Opaque non-polar solution is gathered, with the bright attitude and the dark attitude of control display picture element in the zone away from pixel electrode.
Figure 1A and 1B show that respectively traditional Electrowetting display closes the diagrammatic cross-section of the state of opening with voltage at voltage.See also Figure 1A, traditional colored electroweting type display 10 comprises a substrate 11, and patterning pixel electrode 12 is arranged on the substrate 11.One dielectric layer (tool hydrophobic surface character) 13 is arranged on the patterning pixel electrode 12.The water wettability barrier wall structure 14 of patterning is arranged on the dielectric layer 13, defines each pixel region.The opaque non-polar liquid 15a and the transparent polar liquid 16 that contain black dyes are arranged in each pixel region.When the operating voltage off status, opaque non-polar liquid 15a is evenly distributed in the pixel, and this moment, the show state of pixel was dark attitude (dark state).
When operating voltage is opened state; Transparent polar liquid 16 receives the influence of electricity wetting (Electrowetting) acting force; Affine with pixel electrode, and make opaque non-polar liquid 15b towards away from gathering in the pixel electrode 12, thereby expose most pixel region; This moment, the show state of pixel was bright attitude (bright state), shown in Figure 1B.
Fig. 2 is the diagrammatic cross-section that shows the conventional monolayers colored electroweting type display device.In Fig. 2, conventional monolayers technicolo profit display 50 comprises one first substrate 51 and the 61 subtend settings of one second substrate.Comprise patterned electrodes 52 corresponding each sub-pixel regions on first substrate 51.One reflection horizon 53 is arranged on the patterning pixel electrode 52.One isolation structure 54 is arranged on the reflection horizon 53, to define a plurality of sub-pixels (sub-pixel) array.The first fluid 55 that contains black dyes is arranged in each sub-pixel regions on the patterned electrodes 52.The one second transparent fluid 56 is filled in first substrate 51 and second substrate 61.One colored filter 62 comprises that red 62R, green 62G, blue 62B colour cell are arranged on second substrate 61.Each colour cell 62R, 62G, 62B be a corresponding sub-pixel (sub-pixel) zone respectively.One hermetically-sealed construction 70 is in the neighboring area of display pannel, with first substrate 51 and second substrate, 61 involutions.Community electrode 65 contacts with second fluid 56.The electric field that utilizes the electrode 52 of common electrode 65 and each pixel region to be produced changes the surface tension of first fluid 55, reaches the purpose of video picture.More particularly, control the reflection and the absorption of external light source through the contraction and the tiling of the nonpolar printing ink of black, and utilize reflected light to penetrate the colored filter of upper substrate, can produce different coloured light, reach the effect of full-colorization.
World Intellectual Property Organization's application case discloses WO03/071347 number and discloses a kind of colored electroweting type display structure.For example, Fig. 3 is the diagrammatic cross-section that shows the colored three layers of Electrowetting display device of tradition.See also Fig. 3; In the structure of three-layer type colored electroweting type color monitor 100; Between upper and lower substrate, be isolated into a plurality of sub-pixel structures with isolation structure 113; And in each sub-pixel, insert nonpolar printing ink 105W, 105C, 105Y, the 105M of polar solvent 106 and corresponding two kinds of different colours, wherein two kinds of nonpolar printing ink sandwich one deck polar solvents make its upper and lower base plate inside present three layers of solution of printing ink, polar solvent, printing ink.One colored filter 121 is set above upper substrate, and the printing ink of two kinds of different colours that this colored filter and upper and lower substrate are inner is complementary color each other each other.When operation; Control respectively and apply and be biased in different electrode 112,132-137; And be reflected plate 122 reflections or absorbed the color of special spectrum by nonpolar printing ink 105W, 105C, 105Y, 105M of incident light 116 are controlled in the contraction of the nonpolar printing ink through two different colors and tiling; And utilize reflected light to penetrate colour cell 121M, 121C, the 121Y of the colored filter of upper plate, can produce different coloured light.
Yet with the colored structure of the conventional monolayers of colored filter collocation black non-polar solution (like printing ink), the light source of colorized optical filtering sector-meeting absorption portion causes light utilization efficiency to descend, and then causes the contrast of display frame and brightness to reduce.In addition, colored filter and lower plate also can increase degree of difficulty and the complexity that panel is made to the upright problem of hyte.On the other hand, adopt the color saturation and the chromaticity of the panel of three-decker to promote effectively, but panel construction is complicated, manufacture craft is difficult for, and manufacturing cost also improve relatively.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of colored electroweting type display device, to promote image quality and to reduce panel cost of manufacture and degree of difficulty.
To achieve these goals, the embodiment of the invention provides a kind of colored electroweting type display device, comprising: one first substrate and one second substrate subtend are provided with, and insert and put a polar solvent layer and the non-polar solution layer with color therebetween; One first transparent electrode layer is arranged on this first substrate; One second transparent electrode layer is arranged on this second substrate; And one the water wettability isolation structure be arranged at this second substrate, to define a plurality of sub-pixels; Wherein this colored electroweting type display device comprises the array that a plurality of pixel constitutes, and each pixel comprises a plurality of primary color sub-pixel; This non-polar solution layer of the corresponding different colours of each subpixels wherein, and this non-polar solution layer of variant color is isolated to each other; And wherein this non-polar solution layer color in the adjacent subpixels is different.
To achieve these goals, the embodiment of the invention provides a kind of colored electroweting type display device in addition, comprising: one first substrate and one second substrate subtend are provided with, and insert and put a polar solvent layer and the non-polar solution layer with color therebetween; One first transparent electrode layer is arranged on this first substrate; One second transparent electrode layer is arranged on this second substrate; And one the water wettability isolation structure be arranged at this second substrate, to define a plurality of sub-pixels; Wherein this colored electroweting type display device comprises the array that a plurality of pixel constitutes, and each pixel comprises a black mole pixel and a plurality of primary color sub-pixel; This non-polar solution layer of the corresponding different colours of each subpixels wherein, and this non-polar solution layer of variant color is isolated to each other; And wherein this non-polar solution layer color in the adjacent subpixels is different.
Electrowetting display device of the present invention be change fluid with electric field surface nature as the medium that manifests pixel.More particularly; The dot structure of colorize electric wet-type display of the present invention; Mainly arrange the electric moistening display that reaches colorize, and then promote image quality and reduce panel cost of manufacture and degree of difficulty through the pattern and the color in the sub-pixel of sub-pixel.
For making the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and conjunction with figs., elaborates as follows:
Description of drawings
Figure 1A and 1B show that respectively traditional Electrowetting display closes the diagrammatic cross-section of the state of opening with voltage at voltage;
Fig. 2 is the diagrammatic cross-section that shows the conventional monolayers colored electroweting type display device;
Fig. 3 is the diagrammatic cross-section that shows the colored three layers of Electrowetting display device of tradition;
Fig. 4 is the diagrammatic cross-section that shows according to the individual layer colored electroweting type display device of one embodiment of the invention;
Fig. 5 A-5C shows the synoptic diagram of each pixel color conversion of the technicolo wet-type display of one embodiment of the invention respectively;
Fig. 6 A-6C shows the synoptic diagram of each pixel color conversion of the technicolo wet-type display of another embodiment of the present invention respectively;
Fig. 7 A-7C shows the synoptic diagram of each pixel color conversion of the technicolo wet-type display of another embodiment of the present invention respectively; And
Fig. 8 A-8C shows the synoptic diagram of each pixel color conversion of the technicolo wet-type display of another embodiment of the present invention respectively.
[main element symbol description]
Known portions (Fig. 1～3)
10～traditional colored electroweting type display;
11～substrate;
12～pixel electrode;
13～dielectric layer;
14～water wettability shelves wall construction;
15a, 15b～non-polar liquid;
16～transparent polar liquid;
50～conventional monolayers technicolo profit display;
51～the first substrates;
52～patterned electrodes;
53～reflection horizon;
54～isolation structure;
55～first fluid;
56～second transparent the fluid;
61～the second substrates;
62～colored filter;
62R, 62G, 62B～red, green, blue colour cell;
65～common electrode;
70～hermetically-sealed construction;
100～three-layer type colored electroweting type color monitor;
The nonpolar printing ink of 105W, 105C, 105Y, 105M～different colours;
106～polar solvent;
108～middle layer;
113～isolation structure;
112,132-137～electrode;
116 incident lights;
121～colored filter;
121M, 121C, 121Y～colour cell;
122～reflecting plate.
This case part (Fig. 4～8C)
The technicolo profit display of 200～individual layer;
210～the second substrates (infrabasal plate);
The pixel electrode layer of 212～patterning;
214～dielectric layer;
216～hydrophobic material layer;
222～hydrophilic isolation structure;
225C, 225Y, 225M, 225K～non-polar solution layer;
226～transparent polar fluid;
230～the first substrates (upper substrate);
232～common electrode;
240～hermetically-sealed construction;
320a-320d, 420a-420d, 520,620～display pixel;
325C, 425C, 525C～cyan sub-pixel;
325Y, 425Y, 525Y～yellow sub-pixel;
325M, 425M, 525M～carmetta sub-pixel;
625R～red sub-pixel;
625G～green sub-pixels;
625B～blue subpixels;
325K, 425K, 525K, 625K～black sub-pixels;
326,426,526,626～reflecting plate.
Embodiment
Below with each embodiment and accompany the example of description of drawings, 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.And; The part of each assembly will be described explanation respectively in the accompanying drawing, it should be noted that the element that does not illustrate among the figure or describe; For having the form that personnel knew of common knowledge in the affiliated technical field; In addition, certain embodiments is merely and discloses the ad hoc fashion that the present invention uses, and it is not in order to limit the present invention.
The Electrowetting display device of the embodiment of the invention be change fluid with electric field surface nature as the medium that manifests pixel.More particularly; The embodiment of the invention provides a kind of dot structure of colorize electric wet-type display; Mainly arrange the electric moistening display that reaches colorize, and then promote image quality and reduce panel cost of manufacture and degree of difficulty through the pattern and the color in the sub-pixel of sub-pixel.
Fig. 4 is the diagrammatic cross-section that shows according to the individual layer colored electroweting type display device of one embodiment of the invention.See also Fig. 4, the technicolo profit display 200 of an individual layer comprises one first substrate (upper substrate) 230 and the 210 subtend settings of one second substrate (infrabasal plate).Pixel electrode layer 212 corresponding each sub-pixel regions that comprise patterning on second substrate 210.Pixel electrode layer 212 can be transparent conductive material, and its material can be tin indium oxide (ITO) or indium zinc oxide (IZO), and on the whole its thickness range is 0.1～1 micron (μ m).The structure of the pixel electrode layer 212 of patterning can be rectangle, square, triangle, circle, trapezoidal or oval.According to another embodiment of the present invention, a reflection horizon optionally is arranged on second substrate 210, perhaps is arranged between transparent pixels electrode layer 212 and the substrate 210.The material in this reflection horizon can be aluminium, titania (TiO2) or zirconium dioxide (ZrO2).
One dielectric layer 214 is arranged on the patterning pixel electrode 212.According to one embodiment of the invention; The material of dielectric layer 214 can be Parylene (parylene), monox (SiOx), silicon nitride (SiNx), gather difluoroethylene (poly (vinyldiene fluoride)), titania (TiO2) or zirconium dioxide (ZrO2), and on the whole its thickness range is 0.1～1 micron (μ m).Perhaps, a hydrophobic material layer 216 is arranged on the dielectric layer 214, makes it have hydrophobic surface.The material of this hydrophobic material layer 216 can be the hydrophobic polymer of fluorinated or carbon containing class, and on the whole its thickness range is 0.1～1 micron (μ m).
One hydrophilic isolation structure 222 is arranged on the hydrophobic material layer 216, to define the array (array) in a plurality of sub-pixels (sub-pixel) zone.The material of this hydrophilic isolation structure 222 can be hydrophilic photoresistance, and on the whole its thickness range is 5～10 microns (μ m).
A non-polar solution layer 225C, 225Y, 225M, 225K with different colours are arranged in each sub-pixel regions on the hydrophobic material layer 216.The material of non-polar solution layer is decane (decane), dodecane (dodecane) or the tetradecane (tetradecane), and on the whole its thickness range is 1～10 micron (μ m).Perhaps, non-polar solution layer 225C, 225Y, 225M, 225K can be dyestuff (dye) or the pigment (pigment) of various primary colors (for example RGBK (red, green, blue, black) or CYMK (green grass or young crops, Huang, fuchsin, black)).One transparent polar fluid 226 is filled between first substrate 230 and second substrate 210.The material of transparent polar fluid 226 can be water, sodium-chloride water solution or potassium chloride solution, and on the whole its thickness range is 30～250 microns (μ m).One hermetically-sealed construction 240 is in the neighboring area of display pannel, with first substrate 230 and second substrate, 210 involutions.Community electrode 232 contacts with polar fluid 226.Common electrode 232 is transparent conductive material, can be tin indium oxide (ITO) or indium zinc oxide (IZO), and on the whole its thickness range is 0.1～1 micron (μ m).The electric field that utilizes the electrode 212 of common electrode 232 and each pixel region to be produced makes the surperficial affine of polar fluid 226 and hydrophobic material layer 216, with the non-polar solution layer push away pixel electrode 212 effect and in gather, reach the purpose of video picture.More particularly, reflection and absorption through external light source is controlled in the contraction and the tiling of nonpolar printing ink can drive the demonstration of different colours pixel, reach the effect of full-colorization.
According to the embodiment of the invention, this colored electroweting type display device 200 comprises the array that a plurality of pixel constitutes, primary color sub-pixel that each pixel comprises a plurality of (for example four).The shape of each sub-pixel regions can be rectangle, sexangle, square, circle, triangle, trapezoidal or oval.In one embodiment, these a plurality of primary color sub-pixel are respectively a black mole pixel, a red pieces pixel, a green sub-pixel and a blue sub-pixel.In another embodiment, these a plurality of primary color sub-pixel are respectively a black mole pixel, a Huang (Y) sub-pixel, a fuchsin (M) sub-pixel and a green grass or young crops (C) sub-pixel.This non-polar solution layer of the corresponding different colours of each subpixels, and this non-polar solution layer of variant color is isolated to each other.This non-polar solution layer color in the adjacent subpixels is different.
In the structure of individual layer electroweting type color monitor; Insert the nonpolar printing ink of polar solvent and different colours in upper and lower base plate inside; Wherein the printing ink of different colours is separated by the water wettability partition wall on the substrate; Make the printing ink arrangement adjacent one another are of different colours and form each sub-pixel structure, reflection and absorption through the incident light special spectrum is controlled in the contraction and the tiling of the nonpolar printing ink of variant color can produce different coloured light.
Fig. 5 A-5C shows the synoptic diagram of each pixel color conversion of the technicolo wet-type display of one embodiment of the invention respectively.See also Fig. 5 A, display pixel 320a-320d is that square array is arranged, and has cyan sub-pixel 325C, yellow sub-pixel 325Y, carmetta sub-pixel 325M and black sub-pixels 325K respectively.When showing dark attitude, the nonpolar printing ink of the sub-pixel of all colours all tiles.When showing bright attitude, the breach of pixel electrode capable of using makes the nonpolar printing ink of each sub-pixel be contracted to identical corner, exposes the dielectric layer or the reflecting plate 326 of lower floor, shown in Fig. 5 B.In another embodiment; When showing bright attitude, the breach of pixel electrode capable of using is arranged on the common corner of adjacent subpixels, makes that this non-polar solution in each adjacent sub-pixel gathers in the adjacent corner of each adjacent sub-pixel; The dielectric layer or the reflecting plate that expose lower floor are shown in Fig. 5 C.
Fig. 6 A-6C shows the synoptic diagram of each pixel color conversion of the technicolo wet-type display of another embodiment of the present invention respectively.See also Fig. 6 A, display pixel 420a-420d is that hexagon is closely arranged, and has cyan sub-pixel 425C, yellow sub-pixel 425Y, carmetta sub-pixel 425M and the black sub-pixels 425K of six squares respectively.When showing dark attitude, the nonpolar printing ink of the sub-pixel of all colours all tiles.When showing bright attitude, the breach of pixel electrode capable of using is arranged on the same corner of sub-pixel, makes the nonpolar printing ink of each sub-pixel be contracted to identical corner, exposes the dielectric layer or the reflecting plate 426 of lower floor, shown in Fig. 6 B.In another embodiment; When showing bright attitude, the breach of pixel electrode capable of using is arranged on the common corner of adjacent subpixels, makes that this non-polar solution in each adjacent sub-pixel gathers in the adjacent corner of each adjacent sub-pixel; The dielectric layer or the reflecting plate that expose lower floor are shown in Fig. 6 C.
Fig. 7 A-7C shows the synoptic diagram of each pixel color conversion of the technicolo wet-type display of another embodiment of the present invention respectively.See also Fig. 7 A, when showing dark attitude, in display pixel 520, the nonpolar printing ink of the sub-pixel 525C of all colours, 525Y, 525M, 525K all tiles.See also Fig. 7 B, when desire shows bolarious pixel, cyan sub-pixel 525C is driven, its printing ink distribution mode is changed, so display pixel 520 integral body appear is kermesinus.See also Fig. 7 C, when desire shows the pixel of shiny red, cyan sub-pixel 525C and black sub-pixels 525K are driven, its printing ink distribution mode is changed, so display pixel 520 integral body appear is shiny red.
Table one is to show according to the embodiment of the invention, with the CYMK sub-pixel as the electric wet-type display structure, when the color of each pixel of performance, the allocation scheme of each color ink.
Table one
Fig. 8 A-8C shows the synoptic diagram of each pixel color conversion of the technicolo wet-type display of another embodiment of the present invention respectively.See also Fig. 8 A, when showing dark attitude, in display pixel 620, the nonpolar printing ink of the sub-pixel 625R of all colours, 625G, 625B, 625K all tiles.See also Fig. 8 B, when desire shows luteotestaceous pixel, blue subpixels 625B is driven, its printing ink distribution mode is changed, so display pixel 620 integral body appear is dark yellow.See also Fig. 8 C, when desire shows jonquilleous pixel, blue subpixels 625B and black sub-pixels 625K are driven, its printing ink distribution mode is changed, so display pixel 620 integral body appear is glassy yellow.
Table two is to show according to the embodiment of the invention, with the RGBK sub-pixel as the electric wet-type display structure, when the color of each pixel of performance, the allocation scheme of each color ink.
Table two
Though the present invention discloses as above with embodiment; So it is not in order to limit scope of the present invention; The personnel that have common knowledge in the technical field under any; Do not breaking away from the spirit and scope of the present invention, when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the scope that appending claims defines.
Claims (8)
1. a colored electroweting type display device is characterized in that, comprising:
One first substrate and one second substrate subtend are provided with, and insert and put a polar solvent layer and the non-polar solution layer with color therebetween;
One first transparent electrode layer is arranged on this first substrate;
One second transparent electrode layer is arranged on this second substrate; And
One water wettability isolation structure is arranged at this second substrate, to define a plurality of sub-pixels;
Wherein this colored electroweting type display device comprises the array that a plurality of pixel constitutes, and each pixel comprises a plurality of primary color sub-pixel;
This non-polar solution layer of the corresponding different colours of each subpixels wherein, and this non-polar solution layer of variant color is isolated to each other;
Wherein this non-polar solution layer color in the adjacent subpixels is different; And
This second transparent electrode layer is provided with breach; This breach is arranged on the common corner of adjacent subpixels or the same corner of each sub-pixel; When operation, this non-polar solution in each sub-pixel shrinks towards the adjacent corner of this adjacent subpixels or the same corner of each sub-pixel.
2. colored electroweting type display device according to claim 1 is characterized in that, this second transparent electrode layer is a pattern structure, and this pattern structure can be rectangle, square, triangle, circle, trapezoidal or oval.
3. colored electroweting type display device according to claim 1 is characterized in that, comprises that also a dielectric layer is arranged on this second transparent electrode layer.
4. colored electroweting type display device according to claim 3 is characterized in that, comprises that also a hydrophobic material layer is arranged on this dielectric layer.
5. colored electroweting type display device according to claim 3 is characterized in that, the material of this dielectric layer can be Parylene, monox, silicon nitride, gathers difluoroethylene, titania or zirconium dioxide.
6. colored electroweting type display device according to claim 4 is characterized in that, the material of this hydrophobic layer is the hydrophobic polymer of a fluorinated or a carbon containing class.
7. colored electroweting type display device according to claim 1 is characterized in that, the material of this water wettability isolation structure is to be made up of a water wettability photoresistance.
8. colored electroweting type display device according to claim 1 is characterized in that, the material of this polar solvent layer is water, sodium-chloride water solution or potassium chloride solution.
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| CN102998792A (en) * | 2012-09-21 | 2013-03-27 | 友达光电股份有限公司 | Display panel |
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| US8059328B1 (en) * | 2010-09-20 | 2011-11-15 | Industrial Technology Research Institute | Electrowetting display devices |
| CN102650732A (en) * | 2011-05-16 | 2012-08-29 | 京东方科技集团股份有限公司 | Electro-wetting display unit and electro-wetting display system |
| CN102692703B (en) | 2011-06-02 | 2014-06-18 | 京东方科技集团股份有限公司 | Electro-wetting display |
| TW201319706A (en) * | 2011-11-01 | 2013-05-16 | Ind Tech Res Inst | Pixel structure |
| KR20160114094A (en) * | 2014-01-31 | 2016-10-04 | 클리어잉크 디스플레이스, 인코포레이티드 | Apparatus and method for reflective image display with dielectric layer |
| CN109814292B (en) | 2019-04-04 | 2022-04-12 | 福州京东方光电科技有限公司 | Reflective color film substrate, driving method thereof, display panel and display device |
| CN110262035A (en) * | 2019-06-18 | 2019-09-20 | 京东方科技集团股份有限公司 | Display device and display panel based on electrowetting microlayer model |
| US11703675B2 (en) | 2020-04-13 | 2023-07-18 | Tcl China Star Optoelectronics Technology Co., Ltd. | Display panel and manufacturing method thereof |
| CN111338150B (en) * | 2020-04-13 | 2021-03-16 | Tcl华星光电技术有限公司 | Display panel and preparation method thereof |
| CN114397753A (en) * | 2022-01-10 | 2022-04-26 | 深圳市国华光电研究院 | Electrowetting display device with good light resistance |
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