WO2015035786A1 - 电润湿显示装置及其制备方法 - Google Patents
电润湿显示装置及其制备方法 Download PDFInfo
- Publication number
- WO2015035786A1 WO2015035786A1 PCT/CN2014/076384 CN2014076384W WO2015035786A1 WO 2015035786 A1 WO2015035786 A1 WO 2015035786A1 CN 2014076384 W CN2014076384 W CN 2014076384W WO 2015035786 A1 WO2015035786 A1 WO 2015035786A1
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- WIPO (PCT)
- Prior art keywords
- electrode
- display device
- electrowetting display
- fluid
- contact angle
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/004—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid
- G02B26/005—Optical devices or arrangements for the control of light using movable or deformable optical elements based on a displacement or a deformation of a fluid based on electrowetting
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
Definitions
- a prior art electrowetting display device includes: a fluid chamber, a polar fluid and a non-polar fluid located in the fluid chamber, and electrodes disposed on opposite sides of the fluid chamber, wherein the electrodes constitute a fluid chamber Part of the room.
- the voltage between the two electrodes is varied to alter the electrowetting effect of the polar fluid and at least one side of the fluid chamber, thereby causing the non-polar fluid to expand or contract through the shape and displacement of the polar fluid.
- the electrowetting display device of the above structure realizes display image, the following problems exist: First, the electrode is directly in contact with the polar fluid, and the electric energy directly acts on the polar fluid, thereby easily causing the polar fluid after a certain number of display times. Physical or chemical changes occur. For example, when the polar flow is water, it is liable to cause a water electrolysis reaction. The water electrolysis reaction is an irreversible reaction, which leads to a decrease in the polar fluid, which in turn leads to a shortened life of the electrowetting display device, which simultaneously affects the display effect of the electrowetting display device.
- the partial voltage applied to the polar fluid is subject to other physical or chemical changes, resulting in large electrical energy consumption.
- the polar fluid is water
- part of the electrical energy is reacted by ffi in water.
- the present invention is directed to an electrowetting display device for improving the stability of a polar fluid, extending the life of a display device, and reducing power consumption.
- the present invention also provides a method of preparing an electrowetting display device.
- the present invention provides an electrowetting display device comprising a plurality of fluid chambers and a polar fluid located within the fluid chamber;
- the fluid chamber includes a substrate including first and second electrodes insulated from each other and an electrotransformation film, the electrotransformation film being located on a side of the first electrode adjacent to the polar fluid;
- the contact angle between the electrotransformation film and the polar fluid is switched between a first contact angle and a second contact angle according to a voltage to which the first electrode is applied;
- the first contact angle is not more than 25 degrees, and the second contact angle is not less than 90 degrees.
- the first contact angle is no more than 10 degrees, and the second contact angle is not less than 150 degrees.
- the electroconductive film is composed of a molecule including a hydrophilic group and a hydrophobic group, wherein the hydrophilic group includes a thiol group and a carboxyl group; and the hydrophobic group includes an alkyl group and a benzene ring. And one or more of the fluorine groups.
- the fluid chamber is further provided with a non-polar fluid, and the fluid chamber is divided into a contraction region and an expansion region, wherein the contraction region is used for aggregating the non-polar fluid, the electricity
- the conversion film is located within the deployment zone.
- the first electrode is located in the deployment area.
- the polar fluid is water; and the non-polar fluid is a pigment-containing oil layer.
- the present invention also provides a method for preparing the above electrowetting display device, the method comprising:
- a pattern including an electrotransformation film is formed on the pattern including the first electrode.
- the method for preparing the electrowetting display device further includes:
- the second substrate is paired with the first substrate that completes the above steps.
- the electrowetting display device and the preparation method thereof have the following beneficial effects:
- the electrowetting display device provided by the invention or the electrowetting display device prepared by the preparation method thereof, by using different voltages in the electrotransformation film In order to change the structure of the electrotransformation film, the contact angle between the electrotransformation film and the polar fluid is changed, thereby achieving the purpose of controlling the aggregation and unfolding of the non-polar fluid.
- the present invention avoids the effects of energization on the properties of the polar fluid, thereby facilitating the extension of the useful life of the display device, particularly when the polar fluid is water.
- 1 is a schematic side view showing the structure of an electrowetting display device according to an embodiment of the present invention
- FIG. 2 is a schematic side view showing another embodiment of the electrowetting display device according to an embodiment of the present invention
- FIG. 4 is a schematic top plan view of an electrowetting display device according to an embodiment of the present invention
- FIG. 5A and FIG. Figure 6 is a schematic view showing the hydrophobic state and the hydrophilic state of the membrane
- Figure 6 is a third side view of the fluid chamber of the electrowetting display device according to the embodiment of the present invention.
- FIG. 7 is a flow chart of a method for preparing an electrowetting display device according to an embodiment of the present invention.
- the electrowetting display device of the embodiment includes a plurality of fluid chambers and a polar fluid 180 located in the fluid chamber, the fluid chamber including a substrate, and the substrate includes The electrotransformation film 150, the first electrode 140 and the second electrode 120 insulated from each other.
- the insulation between the first electrode 140 and the second electrode 120 can be achieved by the arrangement of the insulating layer 130.
- the insulating layer 130 is located between the first electrode 140 and the second electrode 120, and the electro-transformation film 150 is located on a side of the first electrode 140 adjacent to the polar fluid 180.
- a contact angle between the electrotransformation film 150 and the polar fluid 180 is switched between a first contact angle and a second contact angle.
- the first contact angle is not more than 25 degrees, and the second contact angle is not less than 90 degrees.
- the electro-transformation film 150 may have a contact angle with the polar fluid 180 at a first contact angle and a second contact according to a positive or negative value of a voltage applied by the first electrode 140. Conversion between corners.
- the electroconductive film 150 may be composed of a material having a hydrophilic group and a hydrophobic group in the molecule. Specific examples include a material having a mercapto group, a benzene ring, a carboxyl group or a fluorine and a thiol group in the molecule, the thiol group and the carboxyl group being a hydrophilic group, the alkyl group, a benzene ring and a fluorine group
- the clusters are all hydrophobic groups.
- the electroconductive film may be composed of 16-Mercapto hexadecanoic acid (MHA).
- the principle of the change of the contact angle between the electrotransformation film and the polar fluid is described by taking 16-mercapyl sixteen: the base acid as an example. As shown in FIG. 5A and FIG. 5B, the 16-mercaptohexadecyl acid segment has an oxygen with electrons.
- the electrotransformation film 150 When the first electrode 140 applies a negative voltage, the electrotransformation film 150 is due to the principle of repelling the same charge. It will exhibit a lipophilic state (ie, a larger contact angle with the polar fluid, that is, a second contact angle); when the first electrode 140 applies a positive voltage, the electroconductive conversion film is due to the principle of the opposite charge attraction.
- the conversion between the first contact angle and the second contact angle between the polar fluid and the electrotransformation film is achieved by applying a different voltage to the first electrode.
- the first contact angle is not more than 25 degrees, and the second contact angle is not less than 90 degrees.
- the specific value of the first contact angle may be 20 degrees, 15 degrees, 10 degrees, or 0 degrees, and the specific values of the second contact angle may be 90 degrees, 95 degrees, 100 degrees, 120 degrees, 130. Degree, 150 degrees or 160 degrees equivalent.
- the contact angle between the polar fluid 180 and the electrotransformation film 150 is the first contact angle, the force between the polar fluid 180 and the electrotransducing film 150 is large, and the danger is The force is applied to the electrotransformation film 150 to discharge the non-polar fluid ⁇ 0 to a corner, thereby causing the non-polar fluid 170 to contract, as shown in FIGS. 1 and 3.
- the contact angle between the polar fluid 180 and the electrotransformation film 150 is the second contact angle, the adhesion of the polar fluid 180 to the surface of the electrotransformation film 150 is small, and the non-polar fluid 170 is in the fluid. Under the action of the fluidity, it is spread on the electrotransformation film 150, as shown in FIG. 2 and FIG.
- the electrowetting display device comprises a matrix of pixels, each pixel corresponding to at least one fluid chamber, and reference numeral 210 in Figures 3 and 4 represents one of the pixels.
- reference numeral 110 denotes a first substrate
- reference numeral 190 denotes a second substrate to the first substrate pair
- reference numeral 160 denotes a retaining wall of the formed fluid chamber.
- the retaining wall may be a black matrix or a sealant formed on the first substrate.
- the electrotransformation film i 50 changes the contact angle between itself and the polar fluid 180 according to the voltage applied by the first electrode 140 and the second electrode 120, thereby realizing the dark state and the bright state of the pixel. Conversion between.
- the electrowetting display device of the present embodiment is configured with electrophoresis by a conventional electrowetting display device that realizes display by changing the shape of the polar fluid under the action of voltage by directly energizing the two sides of the polar fluid.
- the conversion film is such that both electrodes are located on the same side of the fluid chamber, and the voltage applied to the two electrodes is varied to control the change in the properties of the electrotransformation film, and the contact angle between the electrodes and the polar fluid is changed.
- the electroconductive film may be electrically conductive or insulative, for example, an electrically insulating electroconductive film.
- an insulating electrotransformer further prevents chemical or physical changes in the polar fluid from reaching the surface of the electrotransformer film, further reducing power consumption and extending the life of the electrowetting display device.
- the first contact angle is not more than 10 degrees, and the second contact angle is not less than 150 degrees. Even if the polar fluid and the electrotransformation membrane are switched between superhydrophobicity and superhydrophilicity, the reaction speed of the polar fluid can be accelerated, and the response speed of the electrowetting display device can be improved.
- the fluid chamber is further provided with a non-polar fluid that is incompatible with the polar fluid, and the first electrode 140 and the electrotransformation film 150 may be located in a fluid chamber in which it is located.
- the entire lower surface of the chamber for the purpose of accelerating the response speed of the electrowetting display device and limiting the tendency of the non-polar fluid 170 to shrink, as shown in FIG. 6, the embodiment may make further improvements, and the specific improvement may be:
- the constriction zone B-B is used for the aggregation of the non-polar fluid, as shown in Fig. 6, the non-polar fluid is located in the constriction zone B-B after contraction;
- the electrotransformer film 150 is disposed only in the development area A-A.
- the electroconducting film is not provided in the constricted region BB, even if the contact angle between the polar fluid and the electrotransformation film is the first contact angle, the polar fluid in the constricted region BB and the bottom of the fluid chamber are not provided.
- the adhesion between the layers of the electrotransformation membrane region is smaller than that of the development area AA, and the polar fluid flows from the region where the adhesion is small to the region where the adhesion is large, that is, from the contraction zone B-B to the deployment zone A.
- the non The polar fluid flows from the deployment zone A-A to the constriction zone BB, thereby reducing the resistance of the non-polar fluid contraction, thereby accelerating the response speed of the electrowetting display device.
- the fluid chamber is divided into a constricted area and an unfolded area, and the electrotransformation film is disposed in the unfolding area, thereby realizing control of the moving direction of the non-polar fluid during the contraction.
- the first electrode can cover the entire lower surface of the fluid chamber in which it is located.
- the present embodiment is further improved on the basis of the above technical solution, that is, the first electrode is located only in the deployment region. Thereby, the area of the first electrode is reduced, and the amount of power consumed by the first electrode covering the portion of the contraction region is reduced, thereby achieving the effect of reducing power consumption.
- the first electrode may be a plate electrode which is covered with an unfolded area, or may be a comb electrode which is formed by connecting a plurality of strip electrodes.
- the polar fluid may be water
- the non-polar fluid may be a pigment-containing oil layer.
- the polar fluid is water
- the water is not electrolyzed because the voltage is directly applied to the water (the reaction after the water electrolysis is irreversible), so that the display life of the electrowetting display device can be prolonged. The display works well for a long time.
- the pigment contained in the non-polar fluid may be disposed as needed, for example, when the electrowetting display device is a black-and-white display device, the pigment contained in the oil layer may be black; when the electrowetting display device In the case of a color display device, the coloring matter contained in the oil layer may be any one of red, blue, and green primary colors, or one of other colors that can realize color display.
- the first electrode is, for example, a metal electrode, for example, a gold electrode, an aluminum electrode, or the like.
- the metal has a reflection as a reflection type, and when the reflection type electrowetting display device is omitted, the arrangement of the reflection layer can be omitted, and the structure can be bundled.
- the electrowetting display device of the present embodiment is configured with an electrotransformation film and the two electrodes for forming a voltage difference are disposed on the same side of the fluid chamber with respect to the conventional electrowetting display device. Therefore, the problem that the polarity of the polar fluid caused by the application of voltage on both sides of the polar fluid is not sufficiently stable can be effectively avoided, the service life of the electrowetting display device can be effectively prolonged, the power consumption can be reduced, and a good display for a long time can be ensured. effect.
- Embodiment 2 The method for preparing an electrowetting display device of the present embodiment is for forming the electrowetting display device according to any one of the first embodiments.
- the method of preparing the electrowetting display device of the present embodiment has changed in the step of fabricating the fluid chamber substrate as compared with the conventional preparation method. Specifically, the method of preparing the fluid chamber substrate includes the following steps:
- Step ⁇ forming a pattern including the second electrode on the first substrate
- Step 2 forming a pattern including a first electrode insulated from the second electrode on the structure formed in the step;
- Step 3 forming a pattern including an electrotransformation film on the pattern including the first electrode formed in the step 2.
- the pattern formed by any of the above steps 1 to 3 can be formed by a patterning process.
- the patterning process includes a fabrication process of one or more sub-processes such as deposition, coating, exposure, development, etching, and the like.
- an insulating layer may be disposed between the first electrode and the second electrode to achieve insulation.
- the first electrode and the second electrode are both made of a metal material, for example, a conductive metal such as gold, aluminum or copper, for example, a gold material.
- a metal material for example, a conductive metal such as gold, aluminum or copper, for example, a gold material.
- the first electrode is made of a metal material, and since the metal material generally has a reflection property, the fabrication of the reflective layer can be omitted.
- the preparation method further includes:
- the retaining wall may be formed by a black moment or may be composed of a sealant
- a polar fluid and a non-polar fluid are dropped into the fluid chamber
- the second substrate is paired with the first substrate that completes the above steps.
- the electrowetting display device prepared by the method of the embodiment changes the shape of the polar fluid and the non-polar fluid through the addition of the electrotransformation film.
- the realization mode the stability of the polar fluid is improved, and the life of the electrowetting display device is prolonged, and the manufacturing process is more simple than the conventional process.
- Step SI forming a pattern including the second electrode on the first substrate.
- a conductive layer is deposited on the lower substrate (or the first substrate), and the conductive layer is, for example, a metal layer, for example, a gold layer, and is etched by pixels to form a second electrode corresponding to the pixel.
- Step S2 A pattern including an insulating layer is formed. Specifically, a layer of insulating material is deposited or coated on the conductive metal layer to form the insulating layer.
- Step S3 forming a pattern including the first electrode. Specifically, on the insulating layer, another conductive layer is deposited, for example, a metal layer, such as a gold layer, and a first electrode corresponding to the pixel is formed by a patterning process.
- a metal layer such as a gold layer
- Step S4 forming a pattern including an electrotransformation film. Specifically, by depositing or coating an electroconductive film material, coating a photoresist on the electroconductive film material, exposing the photoresist, and developing and etching, forming a power corresponding to each pixel The conversion film pattern is caused.
- Step S5 The side wall of the fluid chamber is formed on the structure formed in step S4, thereby forming an uncapped fluid chamber.
- the method of forming the side wall may be a black matrix or a sealant.
- Step S6 forming a polar fluid and a non-polar fluid such as water and a pigment-containing oil in the uncapped fluid chamber formed in the step S5.
- a specific implementation may be by passing the polar fluid and the non-polar fluid through a drip method. By using the drip method, the amount of the infiltrated polar fluid and the non-polar fluid can be precisely controlled to obtain a better display effect.
- Step S7 The first substrate and the second substrate are packaged to form a closed chamber, and the electrowetting display device according to any one of the embodiments of the present invention is formed.
- the electrowetting display device prepared by the method of the embodiment improves the stability of the polar fluid by increasing the structure and position of the electrode by increasing the electro-transformation film, prolonging the service life of the electrowetting display device, and the manufacturing process It is cylinderized compared to the original process.
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Abstract
Description
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14/413,369 US9519132B2 (en) | 2013-09-10 | 2014-04-28 | Electrowetting display device and method for preparing the same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310409821.6A CN103558685B (zh) | 2013-09-10 | 2013-09-10 | 电润湿显示装置及制作方法 |
| CN201310409821.6 | 2013-09-10 |
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| Publication Number | Publication Date |
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| WO2015035786A1 true WO2015035786A1 (zh) | 2015-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/CN2014/076384 Ceased WO2015035786A1 (zh) | 2013-09-10 | 2014-04-28 | 电润湿显示装置及其制备方法 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US9519132B2 (zh) |
| CN (1) | CN103558685B (zh) |
| WO (1) | WO2015035786A1 (zh) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710201A (zh) * | 2018-07-27 | 2018-10-26 | 京东方科技集团股份有限公司 | 光源模组、背光模组和显示装置 |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558685B (zh) | 2013-09-10 | 2016-01-06 | 京东方科技集团股份有限公司 | 电润湿显示装置及制作方法 |
| CN103809283B (zh) | 2014-02-12 | 2015-11-11 | 北京京东方显示技术有限公司 | 一种光栅、显示装置及光栅的制造方法 |
| US9304312B1 (en) * | 2014-09-17 | 2016-04-05 | Amazon Technologies, Inc. | Electrowetting element and manufacture method |
| CN105842841B (zh) * | 2016-05-04 | 2019-01-25 | 北京大学 | 基于Parylene的柔性电润湿显示装置及制备方法 |
| CN106250849B (zh) * | 2016-08-01 | 2019-06-04 | 京东方科技集团股份有限公司 | 指纹识别装置及其制作方法、显示设备 |
| US10451864B2 (en) | 2017-05-08 | 2019-10-22 | Boe Technology Group Co., Ltd. | Microfluidic color filter, display panel, display apparatus, and method of controlling a display panel |
| CN107116855B (zh) | 2017-05-12 | 2019-05-24 | 京东方科技集团股份有限公司 | 光学组件、光学器件及光学器件的调节方法 |
| CN109782476B (zh) * | 2019-03-13 | 2022-12-16 | 京东方科技集团股份有限公司 | 一种反射式显示装置及其制作方法 |
| CN113064270B (zh) * | 2021-04-22 | 2024-07-16 | 深圳大学 | 一种电润湿显示器件制备方法 |
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2013
- 2013-09-10 CN CN201310409821.6A patent/CN103558685B/zh active Active
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2014
- 2014-04-28 US US14/413,369 patent/US9519132B2/en active Active
- 2014-04-28 WO PCT/CN2014/076384 patent/WO2015035786A1/zh not_active Ceased
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Also Published As
| Publication number | Publication date |
|---|---|
| US9519132B2 (en) | 2016-12-13 |
| CN103558685A (zh) | 2014-02-05 |
| US20160274352A1 (en) | 2016-09-22 |
| CN103558685B (zh) | 2016-01-06 |
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