CN103257445B - A kind of flexible electrical moisten display device - Google Patents
A kind of flexible electrical moisten display device Download PDFInfo
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- CN103257445B CN103257445B CN201310207920.6A CN201310207920A CN103257445B CN 103257445 B CN103257445 B CN 103257445B CN 201310207920 A CN201310207920 A CN 201310207920A CN 103257445 B CN103257445 B CN 103257445B
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Abstract
The invention discloses a kind of flexible electrical moisten display device, this device comprises upper substrate, infrabasal plate and the N number of fluid cavity separated by chamber wall between upper and lower base plate; Immiscible polarity conductivity liquid and nonpolar oil-based liquid is filled in each fluid cavity; Upper substrate and infrabasal plate are flexible material; Upper substrate is provided with hydrophobic dielectric layer near fluid cavity side; The infrabasal plate that each fluid cavity is corresponding is provided with super-hydrophobic region, hydrophilic region or super hydrophilic region; Fluid cavity utilizes the surface infiltration sex differernce of super-hydrophobic region and super hydrophilic or hydrophilic region, because this super hydrophilic or hydrophilic region has strong adhesion to polarity conductivity liquid, the location to polarity conductivity liquid can be kept in substrate generation deformation process, when not by solid components, the relative position of stability contorting polarity conductivity liquid and nonpolar oil-based liquid, realizes flexible electrical and soaks Presentation Function.
Description
Technical field
The present invention relates to a kind of electric moisten display device, particularly a kind of flexible electrical moisten display device.
Background technology
Electrowetting technology is the novel micro-fluidic technologies studied of being used widely in recent years, and it has the features such as low in energy consumption, fast response time, device architecture are simple, volume is little.New display based on electrowetting technology also has the advantage of wide viewing angle simultaneously, possesses excellent using value.The electric moistening display structure of current main flow contains Hydrophobic insulation layer, transparency electrode and fluid cavity.Wherein contain polarity conductivity liquid and nonpolar oil-based liquid in fluid cavity, and these two kinds of liquid must meet some other requirement, such as: low melting point; Suitable viscosity; Good electric wettability, especially will meet unmixing and density close as far as possible.Adjacent fluid chambers is separated by chamber wall usually, and manipulates separately the fluid in each cavity.But current the proposed various display device models wetting based on electricity, all only possesses quiescent operation performance, rock when device is in machinery, especially when component undergoes deformation, owing to not possessing the mechanical part of confined liquid relative position in fluid cavity, the mobility of liquid can make two kinds of liquid generation relative displacements, thus have impact on real-time display effect, limits electrowetting technology in such as bent, the application of field of flexible display of dressing.
Summary of the invention
Goal of the invention: technical matters to be solved by this invention is to provide a kind of flexible electrical moisten display device, this device can make immiscible two kinds of fluids in electric moisten display device accurately locate in bent flexible cavity and realize the replied enlargement and contraction of polar fluid, and does not need to prepare extra device component.
Technical scheme: a kind of flexible electrical moisten display device, comprises upper substrate, infrabasal plate and the N number of fluid cavity separated by chamber wall between upper and lower base plate; Immiscible polarity conductivity liquid and nonpolar oil-based liquid is filled in described each fluid cavity; Described upper substrate and infrabasal plate are flexible material; Described upper substrate is provided with hydrophobic dielectric layer near fluid cavity side; The super hydrophilic region infrabasal plate that described each fluid cavity is corresponding being provided with the super-hydrophobic region being greater than 150 ° with water droplet contact angle, the hydrophilic region being less than 90 ° with water droplet contact angle or being less than 10 ° with water droplet contact angle; The first electrode, the second electrode is provided with between the hydrophobic dielectric layer that described each fluid cavity is corresponding and upper substrate; Described first electrode is arranged relative to infrabasal plate hydrophilic region or super hydrophilic region; Wherein, N be greater than zero natural number.
As optimal way of the present invention, described upper substrate and infrabasal plate are polyester sheet.
As improvement of the present invention, described super-hydrophobic region adopts the highly reflective material of micron order or nanoscale structures.
As a further improvement on the present invention, described first electrode, the second electrode are transparency electrode.
Beneficial effect: compared with prior art, the fluid cavity of flexible electrical moisten display device of the present invention utilizes the surface infiltration sex differernce of super-hydrophobic region and super hydrophilic or hydrophilic region, because this super hydrophilic or hydrophilic region has strong adhesion to polarity conductivity liquid, the location to polarity conductivity liquid can be kept in substrate generation deformation process, when not by solid components, the relative position of stability contorting polarity conductivity liquid and nonpolar oil-based liquid.Therefore, when adopt flexible base, board realize bent, dress flexible display device time, the display state of device can not be subject to the impact of deformation.Upper substrate and infrabasal plate adopt polyester sheet, and polyester sheet, as general available material, significantly reduces the cost realized needed for flexible display device; Super-hydrophobic region adopts the highly reflective material of micron order or nanoscale structures then can realize reflective Flexible Displays function; The first transparent electrode and the second electrode can improve the transmissivity of visible ray at upper substrate.
Accompanying drawing explanation
Diagrammatic cross-section when Fig. 1 is flexible electrical moisten display device of the present invention single fluid cavity OFF state;
Fig. 2 flexible electrical of the present invention moisten display device single fluid cavity lower substrate structure figure;
Diagrammatic cross-section when Fig. 3 is flexible electrical moisten display device of the present invention single fluid cavity ON state.
Embodiment
Below in conjunction with accompanying drawing the present invention done and further explain.
Be illustrated in figure 1 diagrammatic cross-section during the single fluid cavity OFF state of flexible electrical moisten display device, a kind of flexible electrical moisten display device, comprises upper substrate 11, infrabasal plate 12 and the N number of fluid cavity 10 separated by chamber wall 15 between upper and lower base plate.Immiscible polarity conductivity liquid 13 and nonpolar oil-based liquid 14 is filled in each fluid cavity.Wherein, upper substrate 11 and infrabasal plate 12 are flexible material.Upper substrate 11 is provided with hydrophobic dielectric layer 18 near the side of fluid cavity 10, and the material of this hydrophobic dielectric layer 18 can be fluoropolymer, as teflon.The infrabasal plate 12 of each fluid cavity 10 correspondence is provided with the super-hydrophobic region 19 being greater than 150 ° with water droplet contact angle, the hydrophilic region 20 being less than 90 ° with water droplet contact angle; The first electrode 16, second electrode 17 with liquid indirect contact in fluid cavity 10 is provided with between the hydrophobic dielectric layer 18 of each fluid cavity 10 correspondence and upper substrate 11; First electrode 16 is arranged relative to infrabasal plate hydrophilic region or super hydrophilic region 20, and shape is comparatively long and narrow, its width dimensions is less than the size of infrabasal plate hydrophilic region or super hydrophilic region 20, second electrode 17 is polygonal electrode, be distributed in all places except the first electrode 16, the second electrode 17 and the first electrode 16 spacing very little.Electrode arranges the indirect contact that ensure that the first electrode 16 and polarity conductivity liquid 13 on the one hand like this, make the first electrode 16 not occupy the whole top of polarity conductivity liquid 13 on the other hand, reserved a part of area makes the second electrode 17 and polarity conductivity liquid 13 top indirect contact.Wherein, N be greater than zero natural number.Hydrophilic region 20 can also be substituted by the super hydrophilic region 20 being less than 10 ° with water droplet contact angle.Wherein, super-hydrophobic region 19 is the micro nano structure made by fluoropolymer or utilizes fluoropolymer to carry out the common micro nano structure of finishing; The hydrophilic region 20 being less than 90 ° with water droplet contact angle is made by hydrophilic material; The super hydrophilic area being less than 10 ° with water droplet contact angle is the micro nano structure made by water wetted material.
This upper substrate 11 and infrabasal plate 12 adopt requiring to include of material: physical strength high, heat-resisting cold-resistant, oil resistance, water tolerance, the good transparency and bending property, utilize polyester sheet in the present embodiment.This chamber wall 15 is made up of transparent material, plays a supporting role in the middle of upper substrate 11 with infrabasal plate 12.This first electrode 16 and the second electrode 17 are made up, as tin indium oxide of electrically conducting transparent material.First electrode 16 and the second electrode 17 play ground connection respectively and apply the effect of drive singal in the present embodiment, and both also interchangeable uses, namely apply drive singal to electrode 16, apply ground signalling to electrode 17.This hydrophobic dielectric layer 18 is made up of transparent material, as the transparent amorphous fluoropolymer of single layer of hydrophobic, or at transparent inorganic or this fluoropolymer of organic dielectric layer surface deposition, utilizes AF1600 in the present invention.This hydrophobic dielectric layer covers this upper substrate 11 surface.
As the vertical view that Fig. 2 is infrabasal plate 12 in fluid cavity 10.This hydrophilic region or super hydrophilic region 20 are in the centre of infrabasal plate, and super-hydrophobic region 19 covers the every other area on infrabasal plate 12 surface.This polarity conductivity liquid 13 be water, salt solusion etc. property conducting liquid, the difference in wellability due to super hydrophilic region 20 and super-hydrophobic region 19, polarity conductivity liquid 13 by stable maintenance at super hydrophilic region 20.This nonpolar oil-based liquid 14 is filled in fluid cavity 10 other spaces inner.Two kinds of fluids do not dissolve each other, and make polarity conductivity liquid 13 opaque by dyeing.When this first electrode 16 and the second electrode 17 do not apply voltage, this polarity conductivity liquid 13 maintains original state, and pigmented section effective area ratio is less.
As shown in Figure 3, when the single fluid cavity of electric moistening display is in ON state, this first electrode 16, second electrode 17 applies after ground connection and drive singal respectively, has the polarity conductivity liquid 13 of indirect contact at upper substrate 11 surface spreading with the first electrode 16.Polarity conductivity liquid 13 and nonpolar oil-based liquid 14 are similar to stacked distribution, and pigmented section effective area ratio is close to 100%.
Compared with prior art, the infrabasal plate 12 of flexible electrical moisten display device fluid cavity 10 of the present invention comprises super-hydrophobic region 19, super hydrophilic or hydrophilic region 20.This super-hydrophobic region 19 has very strong hydrophobe, and polarity conductivity liquid 13 cannot be stablized and rests on its surface, and super hydrophilic or hydrophilic region 20 has extremely strong water wettability, and polarity conductivity liquid 13 and its surface have very strong adhesion.This adhesion makes polarity conductivity liquid 13 at such as base plate deformation, and machinery still can be stablized under the situation such as rocking and sticks to infrabasal plate 12 surface.Therefore, when adopt flexible base, board realize bent, dress flexible display device time, the display state of device can not be subject to the impact of deformation.Further, in the present invention, this super shape that is hydrophilic or hydrophilic region 20 of infrabasal plate can be arbitrary shape, and can be positioned at the optional position of fluid cavity 10 infrabasal plate 12.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. a flexible electrical moisten display device, comprises upper substrate, infrabasal plate and the N number of fluid cavity separated by chamber wall between upper and lower base plate; Immiscible polarity conductivity liquid and nonpolar oil-based liquid is filled in described each fluid cavity; It is characterized in that: described upper substrate and infrabasal plate are flexible material; Described upper substrate is provided with hydrophobic dielectric layer near fluid cavity side; The super hydrophilic region infrabasal plate that described each fluid cavity is corresponding being provided with the super-hydrophobic region being greater than 150 ° with water droplet contact angle, the hydrophilic region being less than 90 ° with water droplet contact angle or being less than 10 ° with water droplet contact angle; The first electrode, the second electrode is provided with between the hydrophobic dielectric layer that described each fluid cavity is corresponding and upper substrate; Described first electrode, the second electrode are transparency electrode, and described first electrode is arranged relative to infrabasal plate hydrophilic region or super hydrophilic region, and described second distribution of electrodes is in all places except the first electrode; Wherein, N be greater than zero natural number.
2. a kind of flexible electrical moisten display device according to claim 1, is characterized in that: described upper substrate and infrabasal plate are polyester sheet.
3. a kind of flexible electrical moisten display device according to claim 1, is characterized in that: described super-hydrophobic region adopts the highly reflective material of micron order or nanoscale structures.
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| CN201310207920.6A CN103257445B (en) | 2013-05-28 | 2013-05-28 | A kind of flexible electrical moisten display device |
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| CN201310207920.6A CN103257445B (en) | 2013-05-28 | 2013-05-28 | A kind of flexible electrical moisten display device |
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| CN103257445A CN103257445A (en) | 2013-08-21 |
| CN103257445B true CN103257445B (en) | 2016-01-13 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558685B (en) * | 2013-09-10 | 2016-01-06 | 京东方科技集团股份有限公司 | Electric moisten display device and method for making |
| CN103605206B (en) * | 2013-11-26 | 2015-09-02 | 上海交通大学 | A kind of electricity with nano metal grating soaks display unit |
| CN104678549B (en) * | 2015-03-25 | 2018-07-10 | 南京中电熊猫液晶显示科技有限公司 | A kind of electrowetting display device |
| CN105242394A (en) * | 2015-09-02 | 2016-01-13 | 华南师范大学 | Flexible electrowetting display device and preparation technology thereof |
| CN105467578B (en) * | 2016-01-08 | 2018-03-02 | 深圳市国华光电科技有限公司 | The detection method of substrate surface residue in a kind of electrowetting preparation process |
| CN106291914B (en) * | 2016-10-31 | 2018-04-03 | 京东方科技集团股份有限公司 | Display panel and its driving method and display device |
| CN107783337A (en) * | 2017-09-07 | 2018-03-09 | 昆山龙腾光电有限公司 | Transflective display device |
| CN109856792B (en) * | 2019-03-28 | 2020-11-24 | 福州大学 | Electrowetting display device and driving method thereof |
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| US6702483B2 (en) * | 2000-02-17 | 2004-03-09 | Canon Kabushiki Kaisha | Optical element |
| CN101685173A (en) * | 2008-09-26 | 2010-03-31 | 索尼株式会社 | Optical element, imaging device, and method of driving the optical element |
| CN102369474A (en) * | 2009-03-13 | 2012-03-07 | 太阳化学公司 | Colored fluids for electrowetting, electrofluidic, and electrophoretic technologies |
| CN203259713U (en) * | 2013-05-28 | 2013-10-30 | 东南大学 | Flexible electrowetting display apparatus |
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- 2013-05-28 CN CN201310207920.6A patent/CN103257445B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6702483B2 (en) * | 2000-02-17 | 2004-03-09 | Canon Kabushiki Kaisha | Optical element |
| CN101685173A (en) * | 2008-09-26 | 2010-03-31 | 索尼株式会社 | Optical element, imaging device, and method of driving the optical element |
| CN102369474A (en) * | 2009-03-13 | 2012-03-07 | 太阳化学公司 | Colored fluids for electrowetting, electrofluidic, and electrophoretic technologies |
| CN203259713U (en) * | 2013-05-28 | 2013-10-30 | 东南大学 | Flexible electrowetting display apparatus |
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