KR102102204B1 - Switchable privacy protection device between wide wiewing mode and narrow viewing mode for displaying device - Google Patents

Abstract

The present invention relates to a privacy device for a display device capable of switching between a wide viewing angle mode and a narrow viewing angle mode.
The apparatus according to the present invention maintains a gap between the first transparent substrate and the second transparent substrate spaced apart from the first transparent substrate at regular intervals and the first transparent substrate and the second transparent substrate, It includes spacers disposed between the first and second transparent substrates to define a space between the first and second transparent substrates. A first transparent conductive oxide layer is formed on a surface facing the second transparent substrate of the first transparent substrate, and a second transparent conductive oxide layer is formed on a surface facing the first transparent substrate of the second transparent substrate. . In addition, a transparent conductive adhesive layer is attached to the first transparent conductive oxide layer.
The mesh has partitions and cavities defined by the sides of the partitions. The mesh is formed with a third conductive oxide layer integrally extending from the lower surface of the partition walls to the side surfaces of the partition walls defining the cavity, and on the third conductive oxide layer of the side surfaces of the partition walls defining the cavity of the mesh. A plurality of electrochromic layers are formed. The first and second transparent substrates are sealingly sealed with a spacer therebetween, and an electrolyte solution is filled in a space between the first and second transparent substrates.

Description

Privacy protection device for display devices capable of switching between wide viewing angle mode and narrow viewing angle mode {SWITCHABLE PRIVACY PROTECTION DEVICE BETWEEN WIDE WIEWING MODE AND NARROW VIEWING MODE FOR DISPLAYING DEVICE}

The present invention relates to a privacy protection device used in a display device. More specifically, the present invention relates 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) attached to a display device of a computer or installed on the front of the display device to limit the viewing angle so that the content displayed on the display is not visible from the side by narrowing the viewing angle by blocking the transmission of light from the display device to the side ) Is widely used.

The device for limiting the viewing angle has inconvenience in use of removing the viewing angle limiting device from the display device when it is not necessary to limit the viewing angle. In order to solve this inconvenience, a privacy protection device for a display device capable of electrically switching a mode for limiting the viewing angle (narrow viewing angle mode or privacy mode) and a mode for not limiting the viewing angle (wide viewing angle mode or public mode) has been proposed. .

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

Referring to FIG. 1, the privacy protection device includes a first transparent substrate 10, a second transparent substrate 12 disposed to face each other at a predetermined distance to the first transparent substrate 10, and the first transparent substrate And an electrolyte 50 filled between the substrate 10 and the second transparent substrate 12. The uneven pattern 20 is formed on the first transparent substrate 10, and the first transparent conductive film 30 is coated on the surface of the uneven pattern 20. In addition, the second transparent conductive film 32 is coated on the surface of the second transparent substrate 12 facing the first transparent substrate. In addition, the first electro-transparent conductive film 30 is coded with an electrochromic layer 40 along the wall surface of a grating constituting the uneven pattern. The electrochromic layer 40 includes an electrochromic material that transmits or absorbs visible light depending on whether electricity is applied.

When a voltage is applied to the first transparent conductive film 30 and the second transparent conductive film 32, current is applied between the first transparent conductive film and the second transparent conductive film through the electrolyte 50 and the electrochromic layer 40. It flows, and the electrochromic layer 40 is discolored to release the blocking of visible light transmitted to the wall surface to operate in a wide viewing angle mode (public mode, PUBLIC MODE). In addition, when voltage is applied to the first transparent conductive layer and the second transparent conductive layer in opposite directions, visible light is transmitted through the electrochromic layer to operate in a narrow viewing angle mode (privacy mode, PRIVACY MODE).

Republic of Korea Patent Publication No. 10-1226226, the name of the invention, privacy protection filter and its manufacturing method

In order to narrow the viewing angle of the privacy protection device, it is recommended to increase the height difference between the ribs of the uneven pattern and the channel (depth of the channel). In addition, it is preferable to narrow the width of the ribs and the channels of the uneven pattern. In general, a privacy protection device for use in a display device has a narrower viewing angle, a light transmittance with less light loss in a privacy mode, and a transparent electrode with a lower resistance. In order to secure high security performance, it is preferable that the height of the channel of the uneven pattern is 2 times or more, preferably 3 times or more of the channel width.

However, the privacy protection device disclosed in the patent is difficult to manufacture, particularly, a defect is likely to occur during the manufacturing process, and there is a problem that it is difficult to obtain a desired performance. In particular, in the process of coating the first transparent conductive film 30 on the uneven pattern 20, the first transparent conductive film 30 is not well coated to the bottom surface of the channel b of the uneven pattern 20, As a transparent conductor, it is not easy to form a uniform film and to implement a low resistance, so there is a problem in that a defect occurs. The larger the difference between the heights of the ribs (a) and the channels (b) of the uneven pattern 20, the greater the advantage of narrowing the viewing angle, but the larger the difference in height, the larger the height difference, the larger the difference between the first transparent conductive film on the bottom of the channel (b) Coating becomes more difficult. If the first transparent conductive film is not coated on the channel of the uneven pattern 20, the voltage is not applied to the first transparent conductive film, so that the privacy protection device cannot operate.

In addition, the process of coating the electrochromic layer 40 on the uneven pattern 20 coated with the first transparent conductive film 30 and the rib (a) except for the wall surface of the rib (a) of the uneven pattern 20 A defect may occur in the process of removing the electrochromic layer 40 coated on the top of the top and the bottom of the channel (b), and there is also difficulty in process control because the unwanted area is partially etched. In particular, when the electrochromic layer 40 coated on the bottom of the channel b is not completely removed, there is a problem in that the light transmittance of the privacy protection device is lowered by blocking the light emitted from the channel.

The present invention is 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 of a new structure that is easy to manufacture and can reduce the occurrence of defects during the manufacturing process, and an object of the present invention.

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

The privacy protection device for a display device according to the present invention includes a first transparent substrate, a second transparent substrate spaced apart from the first transparent substrate and disposed to face each other, and between the first transparent substrate and the second transparent substrate. Spacers are disposed between the first and second transparent substrates to maintain a gap and to define a space between the first and second transparent substrates. A first transparent conductive oxide layer is formed on a surface facing the second transparent substrate of the first transparent substrate, and a second transparent conductive oxide layer is formed on a surface facing the first transparent substrate of the second 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 partitions and cavities defined by the sides of the partitions. The pattern formed by the ribs of the mesh may be composed of various polygonal shapes such as square, rectangular, hexagonal, and octagonal. A third conductive oxide layer integrally extending from the lower surface of the partition walls to the side surfaces of the partition walls defining the cavity is formed on the mesh, and on the third conductive oxide layer of the side surfaces of the partition walls defining the cavity of the mesh. A plurality of electrochromic layers are formed. In addition, 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 sealingly sealed with a spacer therebetween, and an electrolyte solution is filled in a space between the first and second transparent substrates. 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, in the 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, the first transparent conductive oxide layer is electrically connected to the third transparent conductive oxide layer through the transparent conductive adhesive layer, The second transparent conductive oxide layer is electrically connected through the electrolyte solution. Therefore, a voltage may be applied 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 that can be switched in a high light absorption state and a low light absorption state when a voltage is applied, and when the electrochromic layer is discolored to a high light absorption state, it is switched to a narrow viewing angle mode and electrochromic When the layer is discolored to 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 partition walls of the mesh is formed lower than the height of the side surfaces of the partition walls, and the second transparent conductive oxide layer formed on the second substrate contacts the upper surface of the mesh It can be configured to. In this case, the barrier ribs can maintain insulation even when the second transparent substrate is supported, which is advantageous for manufacturing a privacy protection 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 stacked may be used as the transparent conductive oxide layer. In this case, while the transmittance has a similar value to that of the conductive oxide layer, the resistance can be obtained tens of times lower.

In some embodiments, the electrochromic material may include an organic electrochromic material. In addition, in some embodiments, the electrochromic material may include prussian blue or transition metal oxide.

According to another aspect of the present invention, 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 is provided.

A method of manufacturing a privacy protection device for a display device according to the present invention comprises: (a) a transparent conductive oxide layer on the lower surface of the partition walls of the sheet-shaped transparent mesh and the side surfaces of the partition walls including the cavity defined by the partition walls and the partition walls. Forming integrally, (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, and (d) ) The step of adhering and fixing the transparent conductive oxide layer formed on one surface of the first transparent substrate and the lower surface of the transparent net pattern from which the electrochromic layer is removed, and (d) on the edge of one surface of the first transparent substrate. Installing a spacer, filling the internal space formed by the spacer with an electrolyte, and (e) making the transparent conductive oxide layer of the second transparent substrate on which the transparent conductive oxide layer is formed face the transparent conductive oxide layer of the first substrate And disposing and sealing the first and second transparent substrates. 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.

According to the present invention, a third conductive oxide layer is formed integrally extending from the lower surface of the partition walls to the side surfaces of the sheet-shaped mesh, and a plurality of electrochromic layers are formed on the third conductive oxide layer formed on the side surfaces of the partition walls. There is a characteristic in the formed point.

When the sheet-like mesh having the third conductive oxide layer and the electrochromic layers is separately prepared as described above, when the lower surface of the mesh is fixed to the first transparent conductive oxide layer by using a transparent adhesive, the third There is an advantage that can secure the electrical connection between the conductive oxide layer and the first transparent conductive oxide layer. Therefore, the occurrence of defects during the manufacturing process is small, and the provision process is simplified, thereby reducing manufacturing costs.

In addition, the length of the third conductive oxide layer formed on the partition walls of the mesh may be formed lower than the height of the side surfaces of the partition walls, and the second transparent conductive oxide layer formed on the second substrate may be configured to contact the upper surface of the mesh. have. In this case, the barrier ribs can maintain insulation even when the second transparent substrate is supported, which is advantageous for manufacturing a privacy protection device for a large area display device.

1 is a schematic cross-sectional view of a privacy device for a conventional 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
3 is a perspective view of one embodiment of a mesh used in the device of the present invention
FIG. 4 is an explanatory diagram showing a state in which the privacy protection device for the display device of the embodiment shown in FIG. 2 is operated in a narrow viewing angle mode;
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 a wide viewing angle mode;
6 and 7 are explanatory diagrams showing 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 adding reference numerals to the components of each drawing, the same reference numerals are used for the same components, even if indicated on different drawings. In addition, in describing embodiments of the present invention, when it is determined that detailed descriptions of related well-known configurations or functions may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted. 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, but another component between each component It should be understood that the element may be 'connected', 'coupled' or 'connected'. In the same context, when a component is described as being formed "above" or "below" another component, that component is all formed directly or indirectly through another component in the other component. It should be understood as including.

1st invention: wide viewing angle Mod and Narrow viewing angle Mod Switchable  Privacy device for display devices

Referring to FIG. 1, the privacy protection device 100 for a display device according to the present invention includes a first transparent substrate 110 and a second transparent spaced apart from the first transparent substrate 110 at regular intervals. To maintain a gap between the substrate 170 and the first transparent substrate 110 and the second transparent substrate 170 and to define a space between the first and second transparent substrates 110 and 170, the first And spacers 190 disposed between the 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 are not limited thereto. One 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, Ag can be used. For example, ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide) may be used. In addition, a transparent conductive adhesive layer 150 is attached to the first transparent conductive oxide layer 120.

2 and 3, the sheet-shaped transparent mesh 130 includes partitions 131 and cavities 132 defined (compartmented) by side surfaces of the partitions 131. The pattern formed by the ribs of the mesh 130 may be formed in various polygonal shapes such as square, rectangular, hexagonal, and octagonal. The mesh 130 may be manufactured by molding an optical film or molding a liquid optical polymer in a mold. The mesh 130 may, for example, manufacture a PET film material having excellent light transmittance. The mesh 130 has a third conductive oxide layer 140 extending integrally from the lower surface 131a of the partitions 131 to the side surfaces 131b of the partitions 131 defining the cavity 132. Is formed. In addition, a plurality of electrochromic layers 150 are formed on the third conductive oxide layer 140 formed on the side surfaces 131b of the partition walls 131 that define the cavity 132 of the mesh 130. The third transparent conductive oxide layer 140 formed on the lower surface 131a of the sheet-shaped mesh 130 is adhesively fixed to the upper surface of the transparent conductive adhesive layer 150. The third conductive oxide layer 140 may also be formed using ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide).

The method of forming the first to third transparent conductive oxide layers 120, 180, and 140 is not particularly limited, and a conventional thin film forming method, such as physical vapor deposition (PVD), including sputtering, Chemical vapor deposition (CVD), low pressure, atmospheric pressure, plasma, sol-gel, spray, inkjet And the like can be used as appropriate. According to one embodiment, it is preferable to use a sputtering or low pressure chemical vapor deposition (Low pressure CVD) method for zinc oxide, and it is preferable to use an atmospheric pressure chemical vapor deposition (Atmospheric pressure CVD) method for tin oxide, It is not limited to this. As the transparent conductive oxide layer, a thin film in which a conductive oxide layer, a metal layer, and a conductive oxide layer are laminated may be used. In this case, while the transmittance has a similar value to that of the conductive oxide layer, the resistance can be obtained tens of times lower.

In addition, the first and second transparent substrates 110 and 170 are adhesively sealed with a spacer 190 therebetween, and an electrolyte solution 200 is provided in the space between the first and second transparent substrates 110 and 170. ) Is charged. The electrolyte solution 200 may use any one or more selected from the group consisting of 0.2M to 2M KCl aqueous solution, HCl aqueous solution, and LiClO4-propylene carbonate solution. In addition, the spacer 190 prevents direct contact between the second transparent conductive oxide layer 180 and the third transparent conductive oxide layer 140, and serves to create a space in which the electrolyte solution is injected, and the material is not limited. Any chemically stable material of moderate strength may be used. For example, a polymer film, thin plastic, or glass may be used as the spacer 190. The electrochromic layers 150 include an electrochromic material that can be switched in a high light absorption state and a low light absorption state when a voltage is applied. In addition, the third conductive oxide layer 140 formed on the lower surface 131a of the partition walls 131 of the mesh is fixed on the transparent conductive adhesive layer 160.

The electrochromic materials included in the electrochromic layers 150 are materials that visually change color and shade of color due to changes in absorption wavelength or absorption rate according to electrochemical oxidation and reduction reactions, depending on the type of material. It is divided into inorganic electrochromic materials and organic electrochromic materials. Inorganic electrochromic materials include metal oxide electrochromic materials including tungsten, iridium, nickel, and vanadium, such as WO3, NiOxHy, Nb2O5, V2O5, TiO2, MoO3, and the like. As the organic electrochromic material, an organic electrochromic material including viologen and quinone, a conductive polymer electrochromic material including polythiophene, polyaniline, and polypyrrole and derivatives thereof may be applied. For example, polythiophene, polyaniline, polypyrrole, polyanthracene, polyfluorene, polycarbazole, polyphenylenevinylene, and these It may be any one selected from the group consisting of derivatives of.

The electrochromic material may be liquid or solid, and in the present invention, an electrochromic layer 150 is formed using a solid. When the electrochromic material is liquid, uniform discoloration is not achieved, and power consumption is greatly increased because a voltage must be continuously applied to maintain the discoloration state. The solid color-type electrochromic layer 161 enables uniform discoloration and discoloration, and the electrochromic material has a memory effect, so voltage is applied only during discoloration and discoloration, resulting in low power consumption, and applying reverse voltage during discoloration. Therefore, the color reaction rate is fast, and durability is excellent when an inorganic or organic polymer-based electrochromic material is used.

Hereinafter, the operation of the privacy protection device 100 for a display device of the embodiment shown in FIG. 2 will be described. As shown in FIG. 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 ( 180) is electrically connected through the electrolyte solution 200.

4, when the DC 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 DC voltage is applied to the electrochromic layer 150 to discolor. When the electrochromic layer 150 is discolored, light passes through the same path as the dotted arrow shown, and light passing through the electrochromic layer 150 is blocked to limit the viewing angle θ. Therefore, the privacy protection device 100 for a display device operates in a narrow viewing angle mode (privacy mode). The viewing angle θ is determined by the width W and the height h of the channel c, and 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 according to the following formula.

 <Formula 1>

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

Here, M represents lithium (litithium: Li), proton, calcium (calcium), and the like. In addition, xe ⁻ is a current charge supplied from the electrode, and xM ⁺ refers to ions supplied from an electrolyte solution.

As shown in FIG. 5, when DC voltages B in opposite directions are applied to the first and second transparent conductive oxide layers 120 and 180 of the privacy protection device 100 for a display device, the electrochromic layer 150 ) Becomes colored and becomes transparent, and as shown by the dotted arrow, light can pass through the electrochromic layer. Accordingly, the device 100 operates in a wide viewing angle mode (public mode). In this case, the chemical reaction occurs in the opposite direction in [Formula 1].

In some embodiments, the length of the third conductive oxide layer formed on the partition walls of the mesh is formed lower than the height of the side surfaces of the partition walls, and the second transparent conductive oxide layer formed on the second substrate contacts the upper surface of the mesh It can be configured to. In this case, the barrier ribs can maintain insulation even when the second transparent substrate is supported, which is advantageous for manufacturing a privacy protection device for a large area display device.

Second invention: Wide viewing angle Mod and Narrow viewing angle Mod Switchable  Manufacturing method of privacy device for display device

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 will be described with reference to FIGS. 6 and 7.

A sheet-like transparent mesh 130 as shown in FIG. 3 is prepared to provide a lower surface 131a of the ribs 131 of the mesh 130 and side surfaces 131b of the rib 131 adjacent to the lower surface. On the third transparent conductive oxide layer 140 is formed a coated transparent mesh (130a) (Fig. 6 (a)). The third transparent conductive oxide layer 140 formed on the lower surface 131a and the side surface 131b of the rib 131 is integrally connected. A method of forming a conductive oxide layer such as ITO or ZTO is a known technique. 6 (a), when forming the third transparent conductive oxide layer 140, the length of the third conductive oxide layer 140 formed on the partitions 131 of the mesh 130a is the length of the partitions. It is desirable to form it lower than the height of the side. That is, the third conductive oxide layer 140 is coated at a distance from the lower surface 131c of the partition wall 131 so that the third conductive oxide layer 140 is not coated on the side surface 131b of the partition wall 131. It is desirable to coat the portion 131d to be present. When the third conductive oxide layer 140 is coated in this way, even if the second conductive oxide layer 180 and the partition 131 of the second transparent substrate 170 contact, the second conductive oxide layer 180 and the third conductivity The oxide layer 140 may be prevented from being electrically connected. In particular, when manufacturing the mesh 130a with such a structure, it is advantageous to manufacture a privacy protection 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. K3 [Fe (CN) 6, FeCl3 · 6H2O], HCl mixed solution immersed the mesh 130a in which the third conductive oxide layer 140 is formed, and connects a (+) pole to a platinum (Pt) or graphite electrode. , An electrochromic layer 150 may be formed by electrodepositing Prussian blue by connecting a negative electrode to the third transparent conductive oxide layer 140 of the mesh 130a. Preferably, the electrochromic layer 150 may have a thickness of 10 nm to 1 μm. As the electrochromic material, a transition metal oxide such as WO3 or LixNiyO2 or an organic electrochromic material such as viologen may be used in addition to Prussian Blue. The electrochromic layer formed on the lower surface of the transparent mesh 130b may be removed by dry etching. For dry etching, an ICP RIE (inductively coupled plasma reactive ion etching) method may be used, and an ordinary argon gas may be used for etching, but is not limited thereto. By the etching process, a transparent mesh 130c in which the electrochromic layer 150 is formed only on the side surface 131b of the partition wall 131, as shown in FIG. 6 (c), is obtained.

Next, a first transparent substrate 110 having a first transparent conductive oxide layer 120 formed on one surface 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 is adhered with a transparent conductive adhesive 160 to the mesh 130c ) Is fixed to the first transparent substrate 110 (FIG. 7 (b)). Next, a spacer 190 is installed 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 transparent conductive oxide layer 120 of the first transparent substrate 110 is disposed to face, and the first and second transparent substrates 110 and 170 are bonded and sealed (FIG. 7 (d)).

110 first transparent substrate
120 first transparent conductive oxide layer
130 sheet-shaped transparent mesh
140 third transparent conductive oxide layer
150 electrochromic layer
160 conductive adhesive layer
170 second transparent substrate
180 second transparent conductive oxide layer
190 spacer
200 electrolyte solution

Claims (9)

A first transparent substrate,
A first transparent conductive oxide layer formed on one surface of the first transparent substrate and
A transparent conductive adhesive layer attached to the first transparent conductive oxide layer,
A sheet-shaped mesh fixed to the transparent conductive adhesive layer,
A second transparent substrate spaced apart from the first transparent substrate at regular intervals and disposed to face each other;
A second transparent conductive oxide layer formed on a surface facing the first transparent substrate of the second transparent substrate,
A spacer disposed between the first and second transparent substrates to maintain a gap between the first and second transparent substrates and to define a space between the first and second transparent substrates,
It includes an electrolyte solution filled in the space between the first and second transparent substrate,
The mesh has partition walls and cavities defined by side surfaces of the partition walls, and a third conductive oxide layer formed to extend integrally from the lower surface of the partition walls to the side surfaces of the partition walls defining the cavity, and of the mesh A plurality of electrochromic layers formed on the third conductive oxide layer formed on the side surfaces of the partition walls defining the cavity,
The electrochromic layer includes an electrochromic material capable of switching in a light absorbing state when a voltage is applied,
The third conductive oxide layer formed on the lower surface of the partition walls of the mesh, characterized in that fixed on the transparent conductive adhesive layer,
Privacy protection device for display devices that can switch between wide viewing angle mode and narrow viewing angle mode. According to claim 1,
Characterized in that the length of the third conductive oxide layer formed on the partition walls of the mesh is formed lower than the height of the side surfaces of the partition walls,
Privacy protection device for display devices that can switch between wide viewing angle mode and narrow viewing angle mode. According to claim 1,
The length of the third conductive oxide layer formed on the partition walls of the mesh is formed lower than the height of the side surfaces of the partition walls,
Characterized in that the second transparent conductive oxide layer formed on the second transparent substrate is configured to contact the upper surface of the mesh,
Privacy protection device for display devices that can switch between wide viewing angle mode and narrow viewing angle mode. The method according to any one of claims 1 to 3,
The electrochromic material is characterized in that it comprises an organic electrochromic material,
Privacy protection device for display devices that can switch between wide viewing angle mode and narrow viewing angle mode. The method according to any one of claims 1 to 3,
The electrochromic material is characterized in that it comprises a prussian blue or transition metal oxide,
Privacy protection device for display devices that can switch between wide viewing angle mode and narrow viewing angle mode. The method according to any one of claims 1 to 3,
At least one of the first to third transparent conductive oxide layer is characterized in that the conductive oxide layer and the metal layer and the conductive oxide layer are formed by lamination,
Privacy protection device for display devices that can switch between wide viewing angle mode and narrow viewing angle mode. (a) integrally forming a transparent conductive oxide layer on the lower surface and the side surfaces of the partition walls of the sheet-shaped transparent mesh including the partition walls and the cavity defined by 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 the transparent conductive oxide layer formed on one surface of the first transparent substrate and the lower surface of the transparent net pattern from which the electrochromic layer is removed;
(e) installing a spacer on one edge of the first transparent substrate, and filling the inner space formed by the spacer with an electrolyte;
(f) disposing the transparent conductive oxide layer of the second transparent substrate on which the transparent conductive oxide layer is formed facing the transparent conductive oxide layer of the first substrate, and sealing and sealing the first and second transparent substrates,
The electrochromic layer is characterized in that it comprises an electrochromic material capable of switching the light absorption state when a voltage is applied,
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. The method of claim 7,
The electrochromic material is characterized in that it comprises a prussian blue or transition metal oxide,
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. The method of claim 7,
The electrochromic material is characterized in that it comprises an organic electrochromic material,
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.

Images