WO2019050252A1

WO2019050252A1 - Privacy protection device for display devices capable of switching between wide viewing angle mode and narrow viewing angle mode

Info

Publication number: WO2019050252A1
Application number: PCT/KR2018/010289
Authority: WO
Inventors: 박재범
Original assignee: 주식회사 네이션스
Priority date: 2017-09-05
Filing date: 2018-09-04
Publication date: 2019-03-14
Also published as: KR102102204B1; KR20190026502A

Abstract

The present invention relates to a privacy protection device for display devices, the privacy protection device being capable of switching between a wide viewing angle mode and a narrow viewing angle mode. A device according to the present invention includes: a first transparent substrate; a second transparent substrate disposed facing the first transparent substrate while spaced apart a predetermined distance therefrom; and a spacer which is disposed between the first and second transparent substrates to maintain the distance between the first transparent substrate and second transparent substrate and define the space between the first and second transparent substrates. A first transparent conductive oxide layer is formed on the second transparent substrate-facing surface of the first transparent substrate, and a second transparent conductive oxide layer is formed on the first transparent substrate-facing surface of the second transparent substrate. Moreover, a transparent conductive adhesive layer is attached to the first transparent conductive oxide layer. A mesh comprises partition walls and cavities defined by the sides of the partition walls. A third conductive oxide layer is formed on the mesh, the third conductive oxide layer integrally extending from lower surfaces of the partition walls to the cavity-defining sides of the partition walls. A plurality of electrochromic layers are formed on the third conductive oxide layers of the partition wall sides defining the cavities in the mesh. The first and second transparent substrates are bonded and sealed with the spacer therebetween, and an electrolytic solution is filled in the space between the first and second transparent substrates.

Description

Privacy device for display device that can switch between wide viewing angle mode and narrow viewing angle mode

The present invention relates to a privacy protection device used in a display device. And more particularly, to a privacy protection device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.

A protective device (or protective film) for restricting the viewing angle of the display on the display by narrowing the viewing angle by shielding light transmitted from the display device from being transmitted to the side by being attached to the display device of the computer, ) Are widely used.

An apparatus for limiting the viewing angle has a disadvantage in that it is necessary to remove the viewing angle limiting apparatus from the display apparatus when there is no need to limit the viewing angle. To solve this inconvenience, a privacy device for a display device capable of electrically switching a mode (narrow viewing angle mode or privacy mode) for limiting the viewing angle and a mode (light viewing angle mode or open mode) not limiting the viewing angle has been proposed .

Korean Patent Publication No. 10-1226226 (name of the invention, privacy protection filter and method of manufacturing the same) discloses a switchable privacy protection device using an electrochromic material. Figure 1 shows a schematic view of the device disclosed in the patent.

1, the privacy protection device includes a first transparent substrate 10, a second transparent substrate 12 disposed to face the first transparent substrate 10 with a predetermined gap therebetween, And an electrolyte (50) filled between the substrate (10) and the second transparent substrate (12). A concave-convex pattern 20 is formed on the first transparent substrate 10, and a first transparent conductive film 30 is coated on the surface of the concave-convex pattern 20. The second transparent conductive film 32 is coated on the surface of the second transparent substrate 12 facing the first tilt substrate. The electrochromic layer 40 is coded on the first electro-transparent conductive film 30 along the wall surface of the line grating constituting the concavo-convex pattern. The electrochromic layer 40 includes an electrochromic material that transmits or absorbs visible light depending on whether electricity is applied or not.

When a voltage is applied to the first transparent conductive film 30 and the second transparent conductive film 32, a current flows between the first transparent conductive film and the second transparent conductive film through the electrolyte 50 and the electrochromic layer 40 And the electrochromic layer 40 is discolored to block the visible light transmitted through the wall surface, thereby operating in a wide viewing angle mode (open mode, PUBLIC MODE). In addition, when a voltage is applied to the first transparent conductive film and the second transparent conductive film in the opposite direction, the electrochromic layer is transmitted through visible light and operates in a narrow viewing angle mode (privacy mode, PRIVACY MODE).

Korean Patent Publication No. 10-1226226, title of the invention, privacy protection filter, and manufacturing method thereof

In order to narrow the viewing angle of the privacy protection device, it is preferable that the height difference between the ribs of the concavo-convex pattern and the channel is large (the depth of the channel is deep). It is also preferable to narrow the width of the rib and the width of the channel of the concavo-convex pattern. In general, the privacy protection device for use in a display device is preferable as the viewing angle is narrower. The light transmittance is less in the prism mode, and the resistance of the transparent electrode is more uniform and lower. In order to secure a high security performance, it is preferable that the height of the channel of the concavo-convex pattern be two times or more, preferably three times or more of the channel width.

However, the privacy protection device disclosed in the above patent has a problem that it is difficult to manufacture, in particular, defects occur in the manufacturing process, and it is difficult to obtain a desired performance. Particularly in the step of coating the first transparent conductive film 30 on the concavo-convex pattern 20, the first transparent conductive film 30 is not coated on the channel b of the concavo-convex pattern 20 to the bottom, It is difficult to form a uniform film as a transparent conductor and to realize a low resistance, thereby causing defects. The larger the height difference between the ribs a and b of the concavo-convex pattern 20 is, the narrower the viewing angle can be. However, as the height difference becomes larger, the first transparent conductive film Coating becomes more difficult. If the first transparent conductive film is not coated on the channel of the concavo-convex pattern 20, the voltage is not applied to the first transparent conductive film, so that the privacy protection device can not operate.

The step of coating the electrochromic layer 40 on the concavo-convex pattern 20 coated with the first transparent conductive film 30 and the step of coating the electrochromic layer 40 on the ribs a except for the wall surface of the rib a of the concave- And the electrochromic layer 40 coated on the bottom of the channel (b) may be defective. In addition, the undesired region may be partially etched, so that it is difficult to control the process. Particularly, when the electrochromic layer 40 coated on the bottom of the channel (b) is not completely removed, light emitted from the channel is blocked to lower the light transmittance of the privacy protection device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems. It is an object of the present invention to provide a protection device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode with a new structure which is easy to manufacture and can reduce the occurrence of defects during the manufacturing process, and a manufacturing method thereof.

According to one aspect of the present invention, a privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode is provided.

A privacy protection apparatus for a display apparatus according to the present invention comprises a first transparent substrate, a second transparent substrate spaced apart from the first transparent substrate by a predetermined distance, and a second transparent substrate disposed between the first transparent substrate and the second transparent substrate, And spacers disposed between the first and second transparent substrates to define spacing and to define a space between the first and second transparent substrates. A first transparent conductive oxide layer is formed on a surface of the first transparent substrate facing the second transparent substrate and a second transparent conductive oxide layer is formed on a surface of the second transparent substrate facing the first transparent substrate . In addition, a first transparent conductive oxide layer is formed on one surface of the first transparent substrate, and a transparent conductive adhesive layer is attached to the first transparent conductive oxide layer.

The mesh has cavities defined by the side walls of the partitions and the partitions. The pattern formed by the partition walls (Ribs) of the mesh can be formed into various polygonal shapes such as a square, a rectangle, a hexagon, and an octagon. The mesh is formed with a third conductive oxide layer extending integrally from the lower surface of the partitions to the sides of the partitions defining the cavity, and on the third conductive oxide layer on the sides of the partitions defining the cavity of the mesh A plurality of electrochromic layers are formed. Further, a third conductive oxide layer formed on the lower surface of the partition walls of the mesh is fixed on the transparent conductive adhesive layer.

In addition, the first and second transparent substrates are sealed and sealed with a spacer therebetween, and a space between the first and second transparent substrates is filled with an electrolyte solution. The electrochromic layer includes an electrochromic material capable of switching in a high light absorption state and a low light absorption state when a voltage is applied.

That is, according to the present invention, the first transparent conductive oxide layer is electrically connected to the third transparent conductive oxide layer through the transparent conductive adhesive layer, and the second transparent conductive oxide layer is electrically connected to the third transparent conductive oxide layer. The second transparent conductive oxide layer is electrically connected through the electrolyte solution. Therefore, it is possible to apply a voltage to the plurality of electrochromic layers by applying a voltage to the first and second transparent conductive oxide layers. The electrochromic layers include an electrochromic material capable of switching in a high light absorption state and a low light absorption state when a voltage is applied. When the electrochromic layer is discolored into a high light absorption state, it is switched to a narrow viewing angle mode, When the layer is discolored in a low light absorption state, it is switched to a wide viewing angle mode.

In some embodiments, the length of the third conductive oxide layer formed on the partitions of the mesh is formed to be lower than the height of the side surface of the partitions, and the second transparent conductive oxide layer formed on the second substrate contacts the upper surface of the mesh . In this case, even if the barrier ribs support the second transparent substrate, the insulation can be maintained, which is advantageous for the production of a privacy device for a large-area display device.

In some embodiments, a thin film in which a conductive oxide layer, a metal layer, and a conductive oxide layer are laminated with a transparent conductive oxide layer may be used. In this case, the transmittance has a value similar to that of the conductive oxide layer, but a resistance several tens of times lower than the resistance can be obtained.

In some embodiments, the electrochromic material may comprise an organic electrochromic material. Also, in some embodiments, the electrochromic material may comprise prussian blue or a transition metal oxide.

According to another aspect of the present invention, there is provided a method of manufacturing a privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.

A method of manufacturing a privacy device for a display device according to the present invention includes the steps of: (a) forming a transparent conductive oxide layer on a lower surface of barrier ribs of sheet-shaped transparent mesh including cavities defined by barrier ribs and barrier ribs, (B) forming an electrochromic layer on the conductive oxide layer of the transparent mesh; (c) removing an electrochromic layer formed on a lower surface of the transparent mesh; and ) Bonding and fixing a lower surface of the transparent net pattern on which the electrochromic layer is removed and a transparent conductive oxide layer formed on one surface of the first transparent substrate with a transparent conductive adhesive agent, (d) (E) forming a transparent conductive oxide layer on the second transparent substrate, on which the transparent conductive oxide layer is formed, by the steps of: providing a spacer and filling an internal space formed by the spacer with an electrolyte; And a step of sealing layer is disposed, and the first and the second transparent substrate attached to each other so as to face the transparent conductive oxide layer of the first substrate. The electrochromic layer includes an electrochromic material capable of switching between a high light absorption state and a low light absorption state when a voltage is applied.

According to the present invention, a third conductive oxide layer integrally extending from the lower surface of the partition walls to the side surfaces of the sheet-like mesh is formed, and a plurality of electrochromic layers is formed on the third conductive oxide layer formed on the side surfaces of the partition walls It is characterized by the point formed.

When the sheet-like mesh having the third conductive oxide layer and the electrochromic layers is separately prepared as described above and then the lower surface of the mesh is fixed by adhesion to the first transparent conductive oxide layer using a transparent adhesive, There is an advantage that the electrical connection between the conductive oxide layer and the first transparent conductive oxide layer can be ensured. Accordingly, defects are less likely to occur during the manufacturing process, and the providing process is simplified, so that the manufacturing cost can be reduced.

It is also possible to form the third conductive oxide layer formed on the partition walls of the mesh lower than the height of the side surfaces of the partition walls and to make the second transparent conductive oxide layer formed on the second substrate contact with the upper surface of the mesh have. In this case, even if the barrier ribs support the second transparent substrate, the insulation can be maintained, which is advantageous for the production of a privacy device for a large-area display device.

1 is a schematic cross-sectional view of a conventional privacy-protection device for a switchable display device

2 is a schematic cross-sectional view of an embodiment of a privacy protection device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode according to the present invention

Figure 3 is a perspective view of one embodiment of a mesh used in the apparatus of the present invention.

FIG. 4 is an explanatory diagram showing a state in which the privacy protection device for a display device of the embodiment shown in FIG. 2 is operated in the narrow viewing angle mode;

FIG. 5 is an explanatory diagram showing a state in which the privacy protection device for a display device of the embodiment shown in FIG. 2 is operated in the wide viewing angle mode;

FIG. 6 and FIG. 7 are explanatory diagrams illustrating a method of manufacturing a privacy protection device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, like reference numerals have been used, where possible, to designate identical elements, although they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected." In the same vein, when an element is described as being formed "on" or "under" another element, the element may be formed either directly or indirectly through another element As will be understood by those skilled in the art.

First invention: Wide viewing angle Mode and Narrow viewing angle Mode Switchable Privacy device for display device

1, a privacy protection apparatus 100 for a display device according to the present invention includes a first transparent substrate 110, a second transparent substrate 110 spaced apart from the first transparent substrate 110 by a predetermined distance, The first transparent substrate 110 and the second transparent substrate 170 may be spaced apart from each other by a distance between the first transparent substrate 110 and the second transparent substrate 170. In order to define a space between the first and second

transparent substrates

110 and 170, And a spacer 190 disposed between the first and second

transparent substrates

110 and 170. A first transparent conductive oxide layer 120 is formed on an upper surface of the first transparent substrate 110 and a second transparent conductive oxide layer 180 is formed on a lower surface of the second transparent substrate 170 .

The

transparent substrates

110 and 170 preferably use a transparent synthetic resin optical film such as a PET film having excellent light transmittance, but the present invention is not limited thereto. Either or both of the

transparent substrates

110 and 170 may be used as a glass substrate. The first and second transparent conductive oxide layers (TCO layers) may be formed of various materials. For example, various materials such as In, Sn, Zn, Ga, Cd, Si, Nb, Mo, Al, Cu, Ni and Ag can be used. For example, ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide) can be used. In addition, a transparent conductive adhesive layer 150 is attached to the first transparent conductive oxide layer 120.

2 and 3, the transparent mesh sheet 130 has cavities 132 defined by barrier ribs 131 and side surfaces of the barrier ribs 131. The pattern formed by the ribs Ribs of the mesh 130 may be formed in various polygonal shapes such as a square, a rectangle, a hexagon, and an octagon. The mesh 130 can be manufactured by molding an optical film or by molding a liquid optical polymer in a mold. The mesh 130 can produce, for example, a PET film material having excellent light transmittance. The mesh 130 includes a third conductive oxide layer 140 extending integrally from the lower surface 131a of the barrier ribs 131 to the side surfaces 131b of the barrier ribs 131 defining the cavity 132, Respectively. A plurality of electrochromic layers 150 are formed on the third conductive oxide layer 140 formed on the side surfaces 131b of the partitions 131 that define the cavity 132 of the mesh 130. A third transparent conductive oxide layer 140 formed on the lower surface 131a of the sheet-shaped mesh 130 is adhered and fixed to the upper surface of the transparent conductive adhesive layer 150. [ The third conductive oxide layer 140 may also be formed using indium tin oxide (ITO) or indium zinc oxide (IZO).

The method for forming the first to third transparent conductive oxide layers 120, 180 and 140 is not particularly limited and may be selected from the group consisting of physical vapor deposition (PVD) including sputtering, Chemical vapor deposition (CVD), sol-gel, spray, ink-jet, etc. including low pressure, atmospheric pressure and plasma. And the like can be appropriately used. According to one embodiment of the present invention, zinc oxide is preferably sputtered or a low pressure CVD method. In the case of tin oxide, it is preferable to use an atmospheric pressure CVD method. However, But is not limited thereto. A thin film in which a conductive oxide layer, a metal layer, and a conductive oxide layer are laminated with a transparent conductive oxide layer may be used. In this case, the transmittance has a value similar to that of the conductive oxide layer, but a resistance several tens of times lower than the resistance can be obtained.

The first and second

transparent substrates

110 and 170 are bonded and sealed with a spacer 190 interposed therebetween and a space between the first and second

transparent substrates

110 and 170 is filled with an electrolyte solution 200 ). The electrolyte solution 200 may be selected from the group consisting of a KCl aqueous solution, a HCl aqueous solution, and a LiClO 4 -propylene carbonate solution in a concentration of 0.2M to 2M. In addition, the spacer 190 prevents direct contact of the second transparent conductive oxide layer 180 and the third transparent conductive oxide layer 140, and provides space for the electrolyte solution to be injected. And any chemically stable material of suitable strength can be used. For example, a polymer film, thin plastic, glass, or the like may be used as the spacer 190. The electrochromic layers 150 include an electrochromic material capable of switching between a high light absorption state and a low light absorption state when a voltage is applied. The third conductive oxide layer 140 formed on the lower surface 131a of the mesh barrier ribs 131 is fixed on the transparent conductive adhesive layer 160.

The electrochromic materials included in the electrochromic layers 150 are materials that change the color and color tint visually due to the change of the absorption wavelength or the absorption ratio according to the electrochemical oxidation or reduction reaction. Inorganic electrochromic materials and organic electrochromic materials. Examples of inorganic electrochromic materials include metal oxide electrochromic materials including tungsten, iridium, nickel, and vanadium, for example, WO3, NiOxHy, Nb2O5, V2O5, TiO2, and MoO3. Organic electrochromic materials include organic electrochromic materials including biologen and quinone, electroconductive polymer electrochromic materials including polythiophene, polyaniline, and polypyrrole, and derivatives thereof. For example, there may be mentioned polythiophene, polyaniline, polypyrrole, polyanthracene, polyfluorene, polycarbazole, polyphenylenevinylene, and the like. And derivatives thereof.

The electrochromic material may be a liquid or a solid. In the present invention, the electrochromic layer 150 is formed using a solid material. When the electrochromic material is in the liquid phase, uniform color change is not made and the voltage is continuously applied in order to maintain the discolored state, so that the power consumption is increased. The electrochromic layer 161 in a solid state can be uniformly discolored and decolorized, and the electrochromic material has a memory effect, so that the voltage is applied only at the time of discoloration and decoloration, so that power consumption is reduced. Therefore, the quenching reaction rate is fast, and when an electrochromic material is used as an inorganic or organic high molecular weight material, the durability is excellent.

Hereinafter, the operation of the privacy protection apparatus 100 for the display apparatus of the embodiment shown in FIG. 2 will be described. 2, the first transparent conductive oxide layer 120 is electrically connected to the third transparent conductive oxide layer 140 through the transparent conductive adhesive layer 160, and the second transparent conductive oxide layer 120 180 are electrically connected through the electrolyte solution 200.

4, when a direct-current voltage B is applied to the first and second transparent conductive oxide layers 120 and 180 of the privacy protection device 100 for a display device, a plurality of electrochromic layers 150, A DC voltage is applied to the electrochromic layer 150 so that the electrochromic layer 150 is discolored. When the electrochromic layer 150 is discolored, light passes through a path as shown by the dotted arrow in the figure, and the light passing through the electrochromic layer 150 is blocked to restrict the viewing angle?. Therefore, the privacy device 100 for a display device operates in a narrow viewing angle mode (privacy mode). The viewing angle? Is determined by the width W and height h of the channel c. The narrower the width W and the higher the height h, the narrower the viewing angle.

For example, in the case of the electrolyte solution 200 containing lithium ions and the electrochromic layer 150 containing tungsten oxide as an electrochromic material, an electrochromic effect is exhibited by a chemical reaction represented by the following chemical formula.

&Lt; Formula 1 >

WO ₃ (bleached, transparent) + xe ^- + xM ⁺ MxWO3 (dark blue color, dark blue)

Here, M represents lithium (Li), proton, calcium (Ca), or the like. Xe ^- is the current charge supplied from the electrode, and xM ⁺ is the ion supplied from the electrolyte solution.

5, when a DC voltage B in the opposite direction is applied to the first and second transparent conductive oxide layers 120 and 180 of the privacy device 100 for a display device, the electrochromic layer 150 ) Becomes transparent and becomes transparent so that light can pass through the electrochromic layer as shown by the dotted arrows. Thus, the apparatus 100 is operated in the wide viewing angle mode (open mode). In this case, a chemical reaction occurs in the opposite direction in the formula (1).

Second invention: Wide viewing angle Mode and Narrow viewing angle Mode Switchable Method for manufacturing a privacy device for a display device

6 and 7, a description will be given of a method for manufacturing a privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.

A sheet-like transparent mesh 130 as shown in Fig. 3 is prepared and the lower surface 131a of the ribs 131 of the mesh 130 and the side surfaces 131b of the ribs 131 adjacent to the lower surface thereof, A transparent mesh 130a coated with the third transparent conductive oxide layer 140 is formed (FIG. 6 (a)). The lower surface 131a of the rib 131 and the third transparent conductive oxide layer 140 formed on the side surface 131b are integrally connected. A method of forming a conductive oxide layer such as ITO or ZTO is a known technique. 6A, the length of the third conductive oxide layer 140 formed on the partitions 131 of the mesh 130a when the third transparent conductive oxide layer 140 is formed is made longer than the length of the partition walls 131 The height of the side surface is preferably lower than the height of the side surface. That is, the third conductive oxide layer 140 is coated to be slightly spaced from the lower surface 131c of the barrier rib 131 so that the third conductive oxide layer 140 is not coated on the side surface 131b of the barrier rib 131 It is preferable to coat such that the portion 131d is present. When the third conductive oxide layer 140 is coated with the second conductive oxide layer 180 and the barrier rib 131 are in contact with the second conductive oxide layer 180 of the second transparent substrate 170, It is possible to prevent the oxide layer 140 from being electrically connected. Particularly, when the mesh 130a is manufactured with such a structure, it is advantageous to manufacture a privacy device for a large area display device.

Next, a transparent mesh 130b coated with the electrochromic layer 150 is formed on the third conductive oxide layer 140 of the transparent mesh 130a (FIG. 6 (b)). Next, the electrochromic layer 150 formed on the lower surface of the transparent mesh 130b is removed (Fig. 6 (c)).

For example, an electrochromic layer containing Prussian blue can be formed by electrodeposition. The mesh 130a in which the third conductive oxide layer 140 is formed is immersed in a mixed solution of K3 [Fe (CN) 6, FeCl3 6H2O] and HCl and the positive electrode is connected to the platinum Pt or graphite electrode , And the (-) electrode is connected to the third transparent conductive oxide layer 140 of the mesh 130a to deposit the Prussian blue to form the electrochromic layer 150. Preferably, the electrochromic layer 150 may have a thickness of 10 nm to 1 mu m. In addition to prussian blue, organic electrochromic materials such as transition metal oxides and viologen such as WO3 and LixNiyO2 may be used as electrochromic materials. The electrochromic layer formed on the lower surface of the transparent mesh 130b can be removed by dry etching. The dry etching may be ICP RIE (Inductively Coupled Plasma Reactive Ion Etching) method, and conventional argon gas may be used for etching, but the present invention is not limited thereto. The transparent mesh 130c in which the electrochromic layer 150 is formed only on the side surface 131b of the partition 131 as shown in Fig. 6 (c) is obtained by the etching process.

Next, a first transparent substrate 110 having a first transparent conductive oxide layer 120 formed on one surface thereof is prepared (Fig. 7 (a)). Next, the transparent conductive oxide layer 120 formed on one surface of the first transparent substrate 110 and the lower surface of the transparent mesh 130c from which the electrochromic layer is partially removed are adhered with a transparent conductive adhesive 160 to form a mesh 130c Is fixed to the first transparent substrate 110 (Fig. 7 (b)). Next, a spacer 190 is provided on one edge of the first transparent substrate 110 (Fig. 7 (c)). Next, the electrolyte 200 is filled in the inner space formed by the spacer 190, and the second transparent conductive oxide layer 180 of the second transparent substrate 170, on which the second transparent conductive oxide layer 180 is formed, The first and second

transparent substrates

110 and 170 are bonded and sealed so as to face the first transparent conductive oxide layer 120 of the first transparent substrate 110 (Fig. 7 (d)).

Claims

A first transparent substrate,

A first transparent conductive oxide layer formed on one surface of the first transparent substrate;

A transparent conductive adhesive layer adhered to the first transparent conductive oxide layer;

A sheet-like mesh fixed to the transparent conductive adhesive layer,

A second transparent substrate spaced apart from the first transparent substrate by a predetermined distance,

A second transparent conductive oxide layer formed on a surface of the second transparent substrate facing the first transparent substrate,

A spacer disposed between the first and second transparent substrates to maintain a space between the first transparent substrate and the second transparent substrate and to define a space between the first and second transparent substrates;

And an electrolyte solution filled in a space between the first and second transparent substrates,

The mesh comprising a third conductive oxide layer formed to extend integrally from the lower surface of the partitions to the sides of the partitions defining the cavity, the third conductive oxide layer having cavities defined by the partitions and the sides of the partitions, And a plurality of electrochromic layers formed on the third conductive oxide layer formed on the sides of the barrier walls defining the cavities,

Wherein the electrochromic layer includes an electrochromic material capable of switching between a high light absorption state and a low light absorption state when a voltage is applied,

And a third conductive oxide layer formed on the lower surface of the partition walls of the mesh is fixed on the transparent conductive adhesive layer.

A privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.
The method according to claim 1,

Wherein a length of the third conductive oxide layer formed on the partition walls of the mesh is formed to be lower than a height of a side surface of the partition walls.

A privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.
The method according to claim 1,

The length of the third conductive oxide layer formed on the partitions of the mesh is formed to be lower than the height of the side surface of the partitions,

And a second transparent conductive oxide layer formed on the second substrate is configured to contact the upper surface of the mesh.

A privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.
4. The method according to any one of claims 1 to 3,

Characterized in that the electrochromic material comprises an organic electrochromic material.

A privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.
4. The method according to any one of claims 1 to 3,

Wherein the electrochromic material comprises Prussian blue or a transition metal oxide.

A privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.
4. The method according to any one of claims 1 to 3,

Wherein at least one of the first to third transparent conductive oxide layers is formed by laminating a conductive oxide layer, a metal layer, and a conductive oxide layer.

A privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.
(a) integrally forming a transparent conductive oxide layer on the lower surface of the partition walls of the sheet-shaped transparent mesh including the cavities defined by the partition walls and the partition walls and the side surfaces of the partition walls,

(b) forming an electrochromic layer on the conductive oxide layer of the transparent mesh;

(c) removing the electrochromic layer formed on the lower surface of the transparent mesh,

(d) bonding and fixing a transparent conductive oxide layer formed on a lower surface of the transparent net pattern on which the electrochromic layer is removed and a transparent conductive oxide layer formed on one surface of the first transparent substrate,

(d) providing a spacer on one edge of the first transparent substrate, filling the internal space formed by the spacer with an electrolyte, and

(e) disposing the transparent conductive oxide layer of the second transparent substrate on which the transparent conductive oxide layer is formed so as to face the transparent conductive oxide layer of the first substrate, and sealing the first and second transparent substrates together,

Wherein the electrochromic layer includes an electrochromic material capable of switching between a high light absorption state and a low light absorption state when a voltage is applied,

A method of manufacturing a privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.
8. The method of claim 7,

Wherein the electrochromic material comprises Prussian blue or a transition metal oxide.

A method of manufacturing a privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.
8. The method of claim 7,

Characterized in that the electrochromic material comprises an organic electrochromic material.

A method of manufacturing a privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.