CN103257445A - Flexible electric moisturizing display device - Google Patents
Flexible electric moisturizing display device Download PDFInfo
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- CN103257445A CN103257445A CN2013102079206A CN201310207920A CN103257445A CN 103257445 A CN103257445 A CN 103257445A CN 2013102079206 A CN2013102079206 A CN 2013102079206A CN 201310207920 A CN201310207920 A CN 201310207920A CN 103257445 A CN103257445 A CN 103257445A
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Abstract
The invention discloses a flexible electric moisturizing display device. The device comprises an upper substrate, a lower substrate and N fluid cavities separated by cavity walls. Polar conducting liquid and non-polar oil liquid which are not immiscible are filled in each fluid cavity, the upper substrate and the lower substrate are made of flexible materials, one side, close to the fluid cavities, of the upper substrate is provided with a drainage medium layer, and a super-hydrophobic area, a hydrophilic area or a super-hydrophilic area is arranged on each fluid cavity and corresponds to the lower substrate. The difference of the moisture properties of the surface of the super-hydrophobic area, the hydrophilic area or the super-hydrophilic area is utilized, due to the fact that the hydrophilic area or the super-hydrophilic area has strong adhesion force on the polar conducting liquid, locating of the polar conducting liquid can be kept in the deformation process of the substrate, under the condition without aid of a solid part, relevant positions of the polar conducting liquid and the non-polar conducting liquid are stably controlled, and a flexible electric moisturizing display function is achieved.
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 of being used widely in recent years and studying, and it has characteristics such as low in energy consumption, that response speed is fast, device architecture is simple, volume is little.Also have the advantage at wide visual angle simultaneously based on the new display of electrowetting technology, possess excellent using value.The electric moistening display structure of main flow has comprised hydrophobicity insulation course, transparency electrode and fluid cavity at present.Wherein comprised polarity conducting liquid and nonpolar oiliness liquid in the fluid cavity, and these two kinds of liquid must satisfy some other requirement, for example: low melting point; Suitable viscosity; Good electric wettability, the density that especially will satisfy unmixing and approach as far as possible.Adjacent fluid chambers is separated by the chamber wall usually, and the fluid in each cavity is controlled separately.But present propose various based on the wetting display device model of electricity, all only possesses the quiescent operation performance, when being in machinery, rocks by device, especially under the situation of parts generation deformation, owing to do not possess the mechanical part of confined liquid relative position in the fluid cavity, the flowability of liquid can make two kinds of liquid generation relative displacements, thereby has influenced real-time display effect, has limited electrowetting technology and has shown the application in field such as flexibility bent, wearing.
Summary of the invention
Goal of the invention: technical matters to be solved by this invention provides a kind of flexible electrical moisten display device, this device can make immiscible two kinds of liquid accurate replied expansion and contraction of locating and realizing polar liquid in bent flexible cavity in the electric moisten display device, 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 N the fluid cavity that is separated by the chamber wall between upper and lower base plate; Fill immiscible polarity conducting liquid and nonpolar oiliness liquid in described each fluid cavity; Described upper substrate and infrabasal plate are flexible material; Described upper substrate is provided with the hydrophobic medium layer near fluid cavity one side; The infrabasal plate of described each fluid cavity correspondence be provided with the water droplet contact angle greater than 150 ° super-hydrophobic zone, with the water droplet contact angle less than 90 ° hydrophilic region or with the super hydrophilic region of water droplet contact angle less than 10 °; Be provided with first electrode, second electrode between the hydrophobic medium layer of described each fluid cavity correspondence and the upper substrate; Described first electrode is with respect to infrabasal plate hydrophilic region or super hydrophilic region setting; Wherein, N is the natural number greater than zero.
As optimal way of the present invention, described upper substrate and infrabasal plate are polyester sheet.
As improvement of the present invention, the highly reflective material of micron order or nanoscale structures is adopted in described super-hydrophobic zone.
As a further improvement on the present invention, described first electrode, 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 wettability difference of super-hydrophobic zone and super hydrophilic or hydrophilic region, because this super hydrophilic or hydrophilic region has strong adhesion to the polarity conducting liquid, in substrate generation deformation process, can keep the location to the polarity conducting liquid, under the situation by solid components not, the relative position of stable control polarity conducting liquid and nonpolar oiliness liquid.Therefore, when adopting flexible base, board to realize bent, the flexible display device dressed, the show state of device can not be subjected to the influence of deformation.Upper substrate and infrabasal plate adopt polyester sheet, and polyester sheet has greatly reduced and realized the required cost of flexible display device as the material that generally can get; Super-hydrophobic zone adopts the highly reflective material of micron order or nanoscale structures then can realize reflective flexible Presentation Function; The first transparent electrode and second electrode can improve visible light in the transmissivity of upper substrate.
Description of drawings
Diagrammatic cross-section when Fig. 1 is the single fluid cavity OFF state of flexible electrical moisten display device of the present invention;
Fig. 2 is the single fluid cavity lower substrate structure of flexible electrical moisten display device of the present invention figure;
Diagrammatic cross-section when Fig. 3 is the single fluid cavity ON state of flexible electrical moisten display device of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explanation.
Diagrammatic cross-section when being illustrated in figure 1 as 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 N the fluid cavity 10 that is separated by chamber wall 15 between upper and lower base plate.Fill immiscible polarity conducting liquid 13 and nonpolar oiliness liquid 14 in each fluid cavity.Wherein, upper substrate 11 and infrabasal plate 12 are flexible material.Upper substrate 11 is provided with hydrophobic medium layer 18 near a side of fluid cavity 10, and the material of this hydrophobic medium layer 18 can be fluoropolymer, as teflon.The infrabasal plate 12 of each fluid cavity 10 correspondence be provided with the water droplet contact angle greater than 150 ° super-hydrophobic regional 19, with the hydrophilic region 20 of water droplet contact angle less than 90 °; Be provided with first electrode 16, second electrode 17 with fluid cavity 10 interior liquid indirect contacts between the hydrophobic medium layer 18 of each fluid cavity 10 correspondence and the upper substrate 11; First electrode 16 arranges with respect 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 first electrode 16, second electrode 17 and first electrode, 16 spacings are very little.Electrode arranges like this and has guaranteed the indirect contact of first electrode 16 with polarity conducting liquid 13 on the one hand, make the electrode 16 of winning not occupy the whole top of polarity conducting liquid 13 on the other hand, reserve a part of area and make second electrode 17 and the 13 top indirect contacts of polarity conducting liquid.Wherein, N is the natural number greater than zero.Hydrophilic region 20 can also be by substituting with the super hydrophilic region 20 of water droplet contact angle less than 10 °.Wherein, super-hydrophobic regional 19 for the micro nano structure made by fluoropolymer or utilize fluoropolymer to carry out the common micro nano structure of finishing; Made by hydrophilic material less than 90 ° hydrophilic region 20 with the water droplet contact angle; With super hydrophilic area the micro nano structure for by water wetted material made of water droplet contact angle less than 10 °.
This upper substrate 11 adopts the requirement of materials to comprise with infrabasal plate 12: physical strength height, 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 by transparent material, plays a supporting role in the middle of upper substrate 11 and infrabasal plate 12.This first electrode 16 and second electrode 17 are made by the electrically conducting transparent material, as tin indium oxide.First electrode 16 and second electrode 17 play ground connection respectively and apply the effect that drives signal in the present embodiment, and both also interchangeable uses namely apply the driving signal to electrode 16, and electrode 17 is applied ground signalling.This hydrophobic medium layer 18 is made by transparent material, as the transparent amorphous fluoropolymer of single layer of hydrophobic, perhaps at transparent inorganic or this fluoropolymer of organic dielectric layer surface deposition, utilizes AF1600 among the present invention.This hydrophobic medium layer covers this upper substrate 11 surfaces.
Be the vertical view of infrabasal plate 12 in the fluid cavity 10 as Fig. 2.This hydrophilic region or super hydrophilic region 20 are in the centre of infrabasal plate, and super-hydrophobic regional 19 have covered the every other area on infrabasal plate 12 surfaces.This polarity conducting liquid 13 is conducting liquids such as water, salt solusion because the difference of super hydrophilic region 20 and super-hydrophobic regional 19 aspect wellability, polarity conducting liquid 13 by stable maintenance at super hydrophilic region 20.This nonpolar oiliness liquid 14 is filled in fluid cavity 10 inner other spaces.Two kinds of fluids do not dissolve each other, and make polarity conducting liquid 13 opaque by dyeing.When this first electrode 16 and second electrode 17 did not apply voltage, this polarity conducting liquid 13 maintained original state, and pigmented section effective area ratio is less.
As shown in Figure 3, when the single fluid cavity of electric moistening display was in ON state, these first electrode, 16, the second electrodes 17 applied ground connection respectively and drive after the signal, the polarity conducting liquid 13 of indirect contact are arranged at upper substrate 11 surface spreadings with first electrode 16.Polarity conducting liquid 13 and nonpolar oiliness liquid 14 approximate stacked distribution, pigmented section effective area ratio is near 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 regional 19, super hydrophilic or hydrophilic region 20.This super-hydrophobic regional 19 has very strong hydrophobe, and polarity conducting liquid 13 can't be stablized and rests on its surface, and super hydrophilic or hydrophilic region 20 has extremely strong water wettability, and polarity conducting liquid 13 has very strong adhesion with its surface.This adhesion makes polarity conducting liquid 13 such as base plate deformation, and machinery rocks etc. still to stablize under the situation and sticks to infrabasal plate 12 surfaces.Therefore, when adopting flexible base, board to realize bent, the flexible display device dressed, the show state of device can not be subjected to the influence of deformation.And this super shape hydrophilic or hydrophilic region 20 of infrabasal plate can be arbitrary shape among the present invention, and can be positioned at the optional position of fluid cavity 10 infrabasal plates 12.
The above only is preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle 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 (4)
1. flexible electrical moisten display device comprises upper substrate, infrabasal plate and N the fluid cavity that is separated by the chamber wall between upper and lower base plate; Fill immiscible polarity conducting liquid and nonpolar oiliness liquid 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 the hydrophobic medium layer near fluid cavity one side; The infrabasal plate of described each fluid cavity correspondence be provided with the water droplet contact angle greater than 150 ° super-hydrophobic zone, with the water droplet contact angle less than 90 ° hydrophilic region or with the super hydrophilic region of water droplet contact angle less than 10 °; Be provided with first electrode, second electrode between the hydrophobic medium layer of described each fluid cavity correspondence and the upper substrate; Described first electrode is with respect to infrabasal plate hydrophilic region or super hydrophilic region setting; Wherein, N is the natural number greater than zero.
2. a kind of flexible electrical moisten display device according to claim 1, it 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: the highly reflective material of described super-hydrophobic zone employing micron order or nanoscale structures.
4. a kind of flexible electrical moisten display device according to claim 1, it is characterized in that: described first electrode, second electrode are transparency electrode.
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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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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103605206A (en) * | 2013-11-26 | 2014-02-26 | 上海交通大学 | Electrowetting display unit with nano-metal grating |
| WO2015035786A1 (en) * | 2013-09-10 | 2015-03-19 | 京东方科技集团股份有限公司 | Electrowetting display apparatus and manufacturing method therefor |
| CN104678549A (en) * | 2015-03-25 | 2015-06-03 | 南京中电熊猫液晶显示科技有限公司 | 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 |
| CN105467578A (en) * | 2016-01-08 | 2016-04-06 | 深圳市国华光电科技有限公司 | Substrate surface residue detection method in electrowetting preparation process |
| CN106291914A (en) * | 2016-10-31 | 2017-01-04 | 京东方科技集团股份有限公司 | Display floater and driving method thereof and display device |
| CN107783337A (en) * | 2017-09-07 | 2018-03-09 | 昆山龙腾光电有限公司 | Transflective display device |
| CN109856792A (en) * | 2019-03-28 | 2019-06-07 | 福州大学 | Electrowetting display device and its driving method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015035786A1 (en) * | 2013-09-10 | 2015-03-19 | 京东方科技集团股份有限公司 | Electrowetting display apparatus and manufacturing method therefor |
| US9519132B2 (en) | 2013-09-10 | 2016-12-13 | Boe Technology Group Co., Ltd. | Electrowetting display device and method for preparing the same |
| CN103605206A (en) * | 2013-11-26 | 2014-02-26 | 上海交通大学 | Electrowetting display unit with nano-metal grating |
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| CN106291914A (en) * | 2016-10-31 | 2017-01-04 | 京东方科技集团股份有限公司 | Display floater and driving method thereof and display device |
| US10613315B2 (en) | 2016-10-31 | 2020-04-07 | Boe Technology Group Co., Ltd. | Display panel, driving method thereof and display device |
| CN107783337A (en) * | 2017-09-07 | 2018-03-09 | 昆山龙腾光电有限公司 | Transflective display device |
| CN109856792A (en) * | 2019-03-28 | 2019-06-07 | 福州大学 | Electrowetting display device and its driving method |
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| CN103257445B (en) | 2016-01-13 |
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