WO2017082681A1 - Smart window and method for producing same - Google Patents

Abstract

The present invention relates to a smart window and a method for producing same and, more specifically, to a smart window which can realize excellent visibility due to significantly improved transmittance by comprising: a substrate; electroconductive nano-partitions formed at predetermined intervals on the substrate; electroconductive light-blocking particles filled in at least part of the space between the electroconductive nano-partitions; and an electrode for applying a voltage to the nano-partitions, and to a method for producing the smart window.

Description

Smart window and its manufacturing method

The present invention relates to a smart window and a method of manufacturing the same.

In general, a smart window is a window that is formed to be turned on and off, and controls the amount of light or heat passing through it by changing the light transmittance when a voltage is applied. That is, the smart window is provided to be changed to a transparent, opaque or translucent state by the voltage and is also called a variable transmittance glass, dimming glass or smart glass (smart glass).

In addition, the smart window may be used as a partition of an indoor space or as a skylight disposed at an opening of a building, and may be used as a highway sign, a bulletin board, a scoreboard, a clock, or an advertisement screen. It can also be used as windows or sunroofs of ships or trains.

The smart window can be divided into Liquid Crystal Display (LCD), Suspended Particle Display (SPD), Electrochromic glass (EC), Photochromic glass (PC) and Thermochromic (LTC: Thermo-chromic glass) is classified. As smart windows are in the spotlight as the next generation of high-performance and high-value products, developed companies and related research institutes are investing enormous budgets.

Conventional smart windows are usually manufactured using a polymer dispersed liquid crystal (PDLC), where a liquid crystal (LC) in a polymer matrix is formed by injecting a polymer dispersed liquid crystal between a pair of glass substrates. It has a dispersed structure. However, a smart window using liquid crystal has a problem in that power consumption is large when it is driven for a long time.

In addition, the conventional polarized particle dispersion type smart window technology has a problem that the thickness becomes thick or the transmission efficiency is low by using a transparent electrode having a multilayer structure.

 Korean Patent Publication No. 2013-0037600 discloses a smart window technology including a polymer dispersed liquid crystal device, but has not suggested an alternative to the aforementioned problem.

An object of the present invention is to provide a smart window that can improve the transmittance of the smart window.

An object of the present invention is to provide a method for manufacturing the smart window.

1. a substrate;

Conductive nano barrier ribs formed at predetermined intervals on the substrate;

Conductive light shielding particles filled in at least a portion of the nano barrier ribs; And

And an electrode for applying a voltage to the nano barrier ribs.

2. In the above 1, wherein the nano barrier ribs are 5 to 200nm in thickness, smart window.

3. In the above 1, wherein the nano barrier ribs form a predetermined pattern, smart window.

4. In the above 3, wherein the pattern is an opening pattern having an opening pattern having a circle, ellipse, triangle, rectangle, pentagon, hexagon, octagon or a mixture thereof, smart window.

5. according to the above 1, wherein the height of the nano barrier rib is 100 to 8,000nm, smart window.

6. In the above 1, the nano barrier ribs are In, Co, Si, Ge, Au, Pd, Pt, Ru, Re, Mg, Zn, Hf, Ta, Rh, Ir, W, Ti, Ag, Cr, Mo At least one metal selected from the group consisting of Nb, Al, Ni, Cu, and WTi; Or indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (IZTO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), florin tin oxide (FTO), indium tin oxide-silver- Indium tin oxide (ITO-Ag-ITO), indium zinc oxide-silver-indium zinc oxide (IZO-Ag-IZO), indium zinc oxide-silver-indium zinc tin oxide (IZTO-Ag-IZTO) and aluminum zinc oxide A smart window comprising at least one metal oxide selected from the group consisting of silver-aluminum zinc oxide (AZO-Ag-AZO).

7. In the above 1, wherein the conductive light shielding particles are carbon black, C.I. Pigment Black 7 and at least one selected from the group consisting of polar nano dyes, smart window.

8. In the above 1, wherein the electrode is a voltage applied to the conductive nano barrier ribs, the conductive light shielding particles are attached to the side of the conductive nano barrier ribs, smart window.

9. The smart window of claim 1, further comprising a polymer pattern on at least some of the conductive nano barrier ribs.

10. The image display device including the smart window of the above 1 to 9.

11. forming a polymer pattern on the substrate;

Forming a conductive layer on the substrate on which the polymer pattern is formed;

Ion milling the conductive layer and etching, and forming a nano-thick coating layer on a side of the polymer pattern to form a nano barrier rib;

Coating a conductive light shielding particle liquid on the substrate on which the nano barrier ribs are formed; And

And connecting an electrode to the conductive nano barrier ribs.

12. The method of claim 11, wherein the nano barrier ribs have a thickness of 5 to 200nm, smart window manufacturing method.

13. In the above 11, wherein the polymer pattern is formed by nano imprinting method, smart window manufacturing method.

14. In the above 11, wherein the coating layer is formed by attaching the conductive particles torn off by ion milling on the side of the polymer pattern, smart window manufacturing method.

15. In the above 11, the conductive layer is In, Co, Si, Ge, Au, Pd, Pt, Ru, Re, Mg, Zn, Hf, Ta, Rh, Ir, W, Ti, Ag, Cr, Mo At least one metal selected from the group consisting of Nb, Al, Ni, Cu, and WTi; Or indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (IZTO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), florin tin oxide (FTO), indium tin oxide-silver- Indium tin oxide (ITO-Ag-ITO), indium zinc oxide-silver-indium zinc oxide (IZO-Ag-IZO), indium zinc oxide-silver-indium zinc tin oxide (IZTO-Ag-IZTO) and aluminum zinc oxide -Silver-aluminum zinc oxide (AZO-Ag-AZO) comprising at least one metal oxide selected from the group consisting of, smart window manufacturing method.

16 according to the above 11, wherein the ion milling is 10 ^- The method of producing a smart window to the plasma under a pressure of ³ Torr is performed by accelerated 100ev to 1500eV ^{- 5} to 10 Torr.

17. The method of 11 above, further comprising the step of removing the polymer pattern, manufacturing method of a smart window.

The smart window of the present invention can significantly improve the transmittance of the smart window by including a conductive nano barrier rib.

1 is a schematic cross-sectional view when no voltage is applied in a smart window according to an embodiment of the present invention.

2 is a schematic cross-sectional view when a voltage is applied in a smart window according to an embodiment of the present invention.

3 to 4 are schematic perspective views of conductive nano barrier ribs formed on a substrate in a smart window, respectively, according to one embodiment of the present invention.

5 is a schematic process diagram of a method of manufacturing a smart window according to an embodiment of the present invention.

The present invention is directed to an opposite substrate; Conductive nano barrier ribs formed at predetermined intervals on the substrate; Conductive light shielding particles filled in at least a portion of the nano barrier ribs; And an electrode for applying a voltage to the nano-barrier, and thus, a smart window and a method for manufacturing the same, which can realize excellent visibility by significantly improving transmittance.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. However, the following drawings attached to the specification are for exemplifying preferred embodiments of the present invention, and together with the contents of the present invention serves to further understand the technical spirit of the present invention, the present invention described in such drawings It should not be construed as limited to matters.

As shown in FIG. 1, the smart window of the present invention may be formed on at least some of the conductive nano barrier ribs 200 and the conductive nano barrier ribs 200 formed at predetermined intervals between the substrate 100 and the substrate 100. Filled conductive light shielding particles 500 and the electrode (not shown) for applying a voltage to the nano-barrier.

The substrate 100 is not particularly limited as long as it has transparency and appropriate strength. For example, the substrate 100 may include cycloolefin such as silicon, quartz, glass, polymer, metal, metal oxide, nonmetal oxide, norbornene or polycyclic norbornene-based monomer. Cellulose, ethylene-acetic acid selected from cycloolefin derivatives, diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, isobutyl ester cellulose, propionyl cellulose, butyryl cellulose or acetyl propionyl cellulose, etc. Vinyl copolymer, polyester, polystyrene, polyamide, polyetherimide, polyacryl, polyimide, polyethersulfone, polysulfone, polyethylene, polypropylene, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol , Polyvinyl acetal, poly Substrate 100 comprising materials such as ether ketone, polyether ether ketone, polyether sulfone, polymethyl methacrylate, polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polycarbonate, polyurethane and epoxy Can be. These materials can be used individually or in mixture of 2 or more types.

The thickness of the substrate 100 is not particularly limited, and may be, for example, 10 μm to 500 μm.

As shown in FIG. 3, the conductive nano barrier rib 200 is positioned on the substrate 100, and the nano barrier rib according to the present invention refers to a barrier rib having a thickness of nano level.

In addition, the conductive nano barrier rib according to the present invention has an advantage that the light transmittance is remarkably improved because the thickness thereof is nanoscopic and is not visually recognized by the user.

The conductive nano barrier rib 200 is made of a conductive material, for example, In, Co, Si, Ge, Au, Pd, Pt, Ru, Re, Mg, Zn, Hf, Ta, Rh, Ir, W, Ti At least one metal selected from the group consisting of Ag, Cr, Mo, Nb, Al, Ni, Cu, and WTi; Or indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (IZTO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), florin tin oxide (FTO), indium tin oxide-silver- Indium tin oxide (ITO-Ag-ITO), indium zinc oxide-silver-indium zinc oxide (IZO-Ag-IZO), indium zinc oxide-silver-indium zinc tin oxide (IZTO-Ag-IZTO) and aluminum zinc oxide -At least one metal oxide selected from the group consisting of silver-aluminum zinc oxide (AZO-Ag-AZO) and the like can be used.

The thickness of the nano barrier ribs is not particularly limited as long as it is within a range capable of improving transmittance, for example, the thickness may be 5 nm to 200 nm, preferably 5 nm to 100 nm, more preferably 5 nm to 50 nm, and most preferably 10 nm to 30 nm. If the thickness is less than 5nm, there may be a problem in durability, and if the thickness is more than 200nm, the transmittance may be lowered.

The height of the nano barrier ribs is not particularly limited, and may be, for example, 100 nm to 8,000 nm. If the height is less than 100nm, it may be difficult for the conductive light shielding particles to be sufficiently attached. If the height is more than 8,000nm, problems such as deterioration of durability of the smart window may occur due to the presence of an excessive gap.

The nano barrier 200 may be located alone or as a plurality of walls.

When the plurality of walls are positioned in parallel, the distance between the nano barrier ribs 200 is not particularly limited, and may be, for example, 10 nm to 3 μm, and preferably 10 nm to 200 nm in view of improving light extraction efficiency. .

The plurality of walls may not be parallel but may meet each other or may be positioned such that the extension lines meet each other.

According to another embodiment of the present invention, the distance between the nano barrier ribs 200 may be, for example, 5 μm to 200 μm, but is not limited thereto.

The nano barrier ribs may form a predetermined pattern. For example, as the opening pattern, the opening may have a polygon such as a circle, an ellipse, a triangle, a square, a pentagon, a hexagon, an octagon, or a combination thereof, and a linear pattern, a mesh pattern, a zigzag, a spiral, a radiation, an irregular shape. It may have a shape such as a single closed curve. 4 illustrates an opening pattern having a hexagonal opening, but is not limited thereto.

The opening pattern is a pattern having an opening surrounded by nano barrier ribs, and the opening pattern may be located alone or in plurality.

When a plurality of opening patterns are located, each opening pattern may be located at regular or irregular intervals. In addition, the plurality of opening patterns may be connected or spaced apart from each other, and may be located in line symmetry, point symmetry, or irregularly.

The opening pattern may include an opening shape of the figure illustrated above; A shape in which the illustrated figure is combined; Alternatively, at least one of the figures may have a mixed shape, and the openings may be arranged periodically or aperiodically.

The smart window of the present invention includes conductive light shielding particles 500 filled in at least a portion of the conductive nano barrier ribs 200.

Since the conductive nano barrier rib 200 according to the present invention is connected to the electrode, it is possible to control the presence or absence of voltage supply to the smart window by the control of the controller.

As shown in FIG. 1, when the voltage is not applied to the smart window, since the conductive light shielding particles are irregularly dispersed between the conductive nano barrier ribs 200, light is absorbed and scattered to form the color of the conductive light shielding particles, For example, black, dark blue, etc. are shown.

On the other hand, when a voltage is applied to the smart window, an electric field is formed around the conductive nano barrier ribs. Accordingly, as shown in FIG. 2, since the conductive light shielding particles 500 having conductivity are regularly arranged and attached to the side surfaces of the conductive nano barrier walls 200, the conductive light shielding particles 500 are converted to a transparent state.

As such, the smart window of the present invention includes the conductive nano-barrier having a nano-thickness and the conductive light shielding particles filled in at least a part of the conductive nano-barrier, thereby improving visibility and significantly improving light transmittance.

The conductive light shielding particles according to the present invention can be used without particular limitation as long as they have conductivity, for example, carbon black, C.I. Pigment black 7, polar nano dyes, and the like. These can be used individually or in mixture of 2 or more types.

The conductive light shielding particles may be dispersed in the transparent fluid.

The transparent fluid can be used in the art without particular limitation, and examples thereof include non-aqueous polar solvents and the like.

Specific examples of the non-aqueous polar solvent include 1,2-propylene glycol, 1,3-propylene glycol, 1,4-butylene glycol, diethylene glycol, dipropylene glycol, ethylene carbonate, propylene carbonate, 1,2- Butylene carbonate, 1,2-cyclohexane carbonate, glycerin carbonate, dimethyl carbonate, diethyl carbonate, acetophenone, pyridine, dimethylmalonate, diacetone alcohol, hydroxypropyl carbamate, beta-hydroxyethyl carbamate, N -Methyl formamide, N-methyl acetamide, dimethyl sulfoxide, sulfolane, 2-pyrrolidone, N-methyl-2-pyrrolidone, N-cyclohexyl-2-pyrrolidone, acetonyl acetone, cyclo Hexanone, ethyl acetoacetate, ethyl-L-lactate, pyrrole, N-methyl pyrrole, N-ethyl pyrrole, 4H-pyran-4-one, 1,3-dimethyl-2-imidazolidinone, morpholine, N-methylmorpholine, N-ethylmorpholine, N-fo Milmorpholine, beta-propiolactone, beta-valerolactone, beta-hexalactone, gamma-butyrolactone, gamma-valerolactone, gamma-hexalactone, gamma-heptalactone, gamma-octalactone, Gamma-Nonalactone, Gamma-Dekaralactone, Delta-Valerolactone, Delta-hexalactone, Delta-heptalactone, Delta-octalactone, Delta-nonlaclactone, Delta-dekaralactone, Delta-tetradekaralactone And delta-octadecolactone, and the like, and the like. These can be used individually or in mixture of 2 or more types.

If necessary, the transparent fluid in which the conductive light shielding particles may be dispersed may further include a surfactant.

Examples of the surfactant include neutral surfactants such as betaine (eg, Zwittergent Co.), phospholipids, lecithin, TRITONTM, TWEENTM; Cationic surfactants of alkene oxide block polymers such as ethylene oxide and propylene oxide; Cationic surfactants such as alkyldimethylamine; Quaternary ammonium salt surfactants such as CTAB or a compound represented by Formula 1 below; Such as alkyl aryl sulfonates, sodium dodecyl sulfate (SDS), alkyl aryl sulfonates, bis-2-ethylhexyl sodium sulfosuccinate, carboxyl surfactants, and phosphate surfactants Anionic surfactants; Fluorocarbon surfactants; Amphoteric (positive) surfactants; Solids such as SiO ₂ , A1 ₂ 0 ₃ , BaTiO ₄ , zeolites having a particle size of several micrometers to several micrometers, or mixtures thereof. These can be used individually or in mixture of 2 or more types.

[Formula 1]

R _x H _y N ⁺ _X ^-

(Wherein R is an organic substituent such as alkyl, aryl or ether, x is an integer from 1 to 4, y is an integer from 0 to 3, and X is a counterion).

The surfactant contributes to the colloidal stabilization of the conductive light shielding particles in the transparent fluid and can lower the interfacial tension to reduce the required voltage.

The smart window of the present invention includes an electrode for applying a voltage to the conductive nano-barrier 200, and transmits or shields light with or without applying a voltage.

As long as the electrode is capable of forming an electric field in the conductive nano barrier ribs 200, those used in the art may be used without particular limitation.

The smart window of the present invention may further include a polymer pattern 400 in at least some of the conductive nano barrier ribs 200.

As the polymer pattern 400, any polymer polymer known in the art may be used without limitation as long as it is a transparent polymer. For example, epoxy, cellulose, acrylic, vinyl chloride, vinyl acetate, polyvinyl alcohol, polyurethane, etc. And polymer resins such as polyesters. These can be used individually or in mixture of 2 or more types.

In addition, the smart window of the present invention may further include a typical configuration required for the smart window.

In addition, the present invention provides an image display device including the smart window. The image display device of the present invention includes a smart window including conductive nano barrier ribs, whereby visibility and transmittance are remarkably improved.

The image display device may include a liquid crystal display device, an OLED, a flexible display, and the like, but is not limited thereto, and all image display devices known in the art may be exemplified.

In addition, the smart window of the present invention can be applied to transportation means such as glass products, automobiles, aircraft for construction.

In addition, the present invention provides a method of manufacturing the smart window.

Hereinafter, a method of manufacturing a smart window according to an embodiment of the present invention will be described.

First, the polymer pattern 400 is formed on the substrate 100 as shown in FIG.

The polymer pattern 400 may be formed by forming a polymer resin layer on the substrate 100 and patterning the polymer resin layer.

Since the height of the nano barrier ribs is determined according to the height of the polymer pattern, the height of the nano barrier ribs of the present invention may be selected by adjusting the height of the polymer pattern.

As the polymer resin layer, polymer resins known in the art can be used without limitation, and for example, epoxy, cellulose, acrylic, vinyl chloride, vinyl acetate, polyvinyl alcohol, polyurethane, polyester, etc. It may be a polymer resin of. These can be used individually or in mixture of 2 or more types.

The method of patterning the polymer resin layer is not particularly limited, and examples thereof include screen printing, gravure printing, flexographic printing, offset printing, inkjet coating, dispenser printing, photolithography, nanoimprinting, and the like. It can be used, and in terms of being able to form a fine pattern, preferably by the nanoimprinting method.

Thereafter, as illustrated in FIG. 5B, the conductive layer 300 is formed on the substrate 100 on which the polymer pattern 400 is formed.

The conductive layer 300 is a conductive material such as at least one metal, at least one metal oxide, and the like, and may include physical vapor deposition, chemical vapor deposition, plasma deposition, plasma polymerization, thermal deposition, thermal oxidation, anodization, cluster ion beam deposition, It may be formed by a screen printing method, a gravure printing method, a flexographic printing method, an offset printing method, an inkjet coating method, a dispenser printing method, a photolithography method, but is not limited thereto.

Examples of the conductive material used for the conductive layer 300 include In, Co, Si, Ge, Au, Pd, Pt, Ru, Re, Mg, Zn, Hf, Ta, Rh, Ir, W, Ti, Ag At least one metal selected from the group consisting of Cr, Mo, Nb, Al, Ni, Cu, and WTi; Or indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (IZTO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), florin tin oxide (FTO), indium tin oxide-silver- Indium tin oxide (ITO-Ag-ITO), indium zinc oxide-silver-indium zinc oxide (IZO-Ag-IZO), indium zinc oxide-silver-indium zinc tin oxide (IZTO-Ag-IZTO) and aluminum zinc oxide -One or more metal oxides selected from the group consisting of silver-aluminum zinc oxide (AZO-Ag-AZO) may be used, but is not limited thereto.

Thereafter, as illustrated in FIG. 5C, the conductive layer 300 is ion milled and etched, and a nano-thick coating layer is formed on the side surface of the polymer pattern 400 to form the nano barrier rib 200.

The nano-thick coating layer corresponds to the nano barrier rib 200.

The gas used to form the ions can be, for example, argon, helium, nitrogen, hydrogen, oxygen or a mixture of these, preferably argon.

Ion milling conditions are not particularly limited, for example, ^10-1 form a plasma in the gas under the pressure ⁵ Torr to 10 ^-3 Torr can then be accomplished by accelerating the plasma by 100eV ~ 1500eV. When the energy is less than 100 eV, the etching of the conductive layer 300 may be difficult. When the energy is more than 1500 eV, the polymer pattern 400 may be damaged, and thus the nano barrier rib may not be easily formed.

The thickness of the nano barrier rib 200 according to the present invention can be selected by adjusting the conditions of ion milling.

The thickness of the nano barrier rib 200 is not particularly limited as long as it is within a range capable of improving transmittance, and may be, for example, 5 nm to 200 nm, preferably 5 nm to 100 nm, more preferably 5 nm to 50 nm, and most preferably. May be 10 nm to 30 nm. If the thickness is less than 5nm, there may be a problem in durability, and if the thickness is more than 200nm, the transmittance may be lowered.

The height of the nano barrier ribs is not particularly limited, and may be, for example, 100 nm to 8,000 nm. If the height is less than 100nm, it may be difficult for the conductive light shielding particles to be sufficiently attached. If the height is more than 5,000nm, problems such as deterioration of durability of the smart window may occur due to the presence of an excessive gap.

Next, the conductive light shielding particle liquid is coated on the substrate on which the nano barrier ribs are formed.

The method of coating the conductive light shielding particle liquid may be formed using any method known in the art without particular limitation, and for example, may be coated by a method of applying and drying a transparent fluid including the conductive light shielding particles described above. But can. It is not limited to this.

Next, the electrode is connected to the conductive nano barrier ribs. The method of connecting the electrode to the conductive nano barrier ribs can be formed using any method known in the art without particular limitation.

If necessary, the method of manufacturing a smart window of the present invention by removing the polymer pattern 400, as shown in Figure 5 (d), only the nano barrier ribs 200 formed on the side may remain. FIG. 5D is a cross-sectional view along the line AA ′ of FIG. 4.

[Description of the code]

100: substrate 200: conductive nano barrier ribs

300: conductive layer 400: polymer pattern

500: conductive light shielding particles

Claims (17)

1. Board;

   Conductive nano barrier ribs formed at predetermined intervals on the substrate;

   Conductive light shielding particles filled in at least a portion of the nano barrier ribs; And

   And an electrode for applying a voltage to the nano barrier ribs.
2. The smart window of claim 1, wherein the nano barrier rib has a thickness of 5 to 200 nm.
3. The smart window of claim 1, wherein the nano barrier ribs form a predetermined pattern.
4. The smart window of claim 3, wherein the pattern is an opening pattern having an opening, an ellipse, a triangle, a square, a pentagon, a hexagon, an octagon, or a mixed shape thereof.
5. The smart window of claim 1, wherein the nano barrier rib has a height of 100 to 8,000 nm.
6. The method of claim 1, wherein the nano barrier ribs are In, Co, Si, Ge, Au, Pd, Pt, Ru, Re, Mg, Zn, Hf, Ta, Rh, Ir, W, Ti, Ag, Cr, Mo, Nb At least one metal selected from the group consisting of Al, Ni, Cu, and WTi; Or indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (IZTO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), florin tin oxide (FTO), indium tin oxide-silver- Indium tin oxide (ITO-Ag-ITO), indium zinc oxide-silver-indium zinc oxide (IZO-Ag-IZO), indium zinc oxide-silver-indium zinc tin oxide (IZTO-Ag-IZTO) and aluminum zinc oxide A smart window comprising at least one metal oxide selected from the group consisting of silver-aluminum zinc oxide (AZO-Ag-AZO).
7. The method of claim 1, wherein the conductive light shielding particles are carbon black, C.I. Pigment Black 7, and at least one selected from the group consisting of polar nano dyes, smart window.
8. The smart window according to claim 1, wherein when the electrode applies a voltage to the conductive nano barrier ribs, the conductive light shielding particles are attached to the side surfaces of the conductive nano barrier ribs.
9. The smart window of claim 1, further comprising a polymer pattern between at least some of the conductive nano barrier ribs.
10. An image display device comprising the smart window of claims 1 to 9.
11. Forming a polymer pattern on the substrate;

    Forming a conductive layer on the substrate on which the polymer pattern is formed;

    Ion milling the conductive layer and etching, and forming a nano-thick coating layer on a side of the polymer pattern to form a nano barrier rib;

    Coating a conductive light shielding particle liquid on the substrate on which the nano barrier ribs are formed; And

    And connecting an electrode to the conductive nano barrier ribs.
12. The method of claim 11, wherein the nano barrier rib has a thickness of 5 to 200 nm.
13. The method of claim 11, wherein the polymer pattern is formed by a nanoimprinting method.
14. The method of claim 11, wherein the coating layer is formed by attaching the conductive particles torn off by ion milling on the side of the polymer pattern.
15. The method of claim 11, wherein the conductive layer is In, Co, Si, Ge, Au, Pd, Pt, Ru, Re, Mg, Zn, Hf, Ta, Rh, Ir, W, Ti, Ag, Cr, Mo, Nb At least one metal selected from the group consisting of Al, Ni, Cu, and WTi; Or indium tin oxide (ITO), indium zinc oxide (IZO), indium zinc tin oxide (IZTO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), florin tin oxide (FTO), indium tin oxide-silver- Indium tin oxide (ITO-Ag-ITO), indium zinc oxide-silver-indium zinc oxide (IZO-Ag-IZO), indium zinc oxide-silver-indium zinc tin oxide (IZTO-Ag-IZTO) and aluminum zinc oxide -Silver-aluminum zinc oxide (AZO-Ag-AZO) comprising at least one metal oxide selected from the group consisting of, smart window manufacturing method.
16. The method according to claim 11, wherein the ion milling is 10 ^- The method of producing a smart window to the plasma under a pressure of ³ Torr is performed by accelerated 100ev to 1500eV ^{- 5} to 10 Torr.
17. The method of claim 11, further comprising removing the polymer pattern.

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