KR100963045B1 - Optical filter for display apparatus and display apparatus comprising the same - Google Patents

Abstract

Provided are an optical filter for a display device and a display device including the same, which are provided with a ground electrode that makes a screen outline of the display device clear and shields electromagnetic waves. An optical filter for a display device includes a first optical film including a transparent first optical substrate and an electromagnetic shielding film formed on the front surface of the first optical substrate, and a black-based metal material formed along an edge on the front surface of the electromagnetic shielding film. And a second optical film including a ground electrode layer, a transparent second optical base material, and an anti-reflection film formed on the entire surface of the second optical base material, and positioned on the ground electrode layer.

Optical filter, optical film, black silver

Description

Optical filter for display apparatus and display apparatus including the same

1 is a schematic exploded perspective view of a PDP apparatus according to an embodiment of the present invention.

2 is an exploded perspective view of an optical filter for a display device according to an embodiment of the present invention.

3 is a longitudinal cross-sectional view of FIG. 2.

4 is a plan view of an optical filter for a display device having a ground electrode according to an exemplary embodiment of the present invention.

5 is an exploded perspective view of an optical filter for a display device according to another embodiment of the present invention.

6 is a longitudinal cross-sectional view of FIG. 5.

7 is an exploded perspective view of an optical filter for a display device according to still another embodiment of the present invention.

8 is a longitudinal cross-sectional view of FIG. 7.

9 is a longitudinal cross-sectional view of a display apparatus according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: first optical film 200: ground electrode

300: second optical film 402: transparent substrate

500, 501, 502: Optical filter 600: Panel assembly

The present invention relates to an optical filter for a display device and a display device including the same. More particularly, the present invention relates to an optical filter for a display device and a display device including the ground electrode for shielding electromagnetic waves while providing a clear screen outline. will be.

As the modern society is highly informationized, display devices are facing market demands for larger and thinner displays, and conventional CRT devices do not sufficiently satisfy these requirements. Therefore, plasma display panel (PDP) devices and PALC ( Flat panel display devices such as plasma address liquid crystal display panel (LCD) devices, liquid crystal display (LCD) devices, organic light emitting diode (OLED) devices, and field emission display (FED) devices are being actively researched as next generation display devices. . Among them, the plasma display device (PDP), which has an excellent viewing angle and is easy to be enlarged and thinned as a self-luminous device, is in the spotlight, and in particular, the large-scale television field is gradually replacing the cathode ray tube (CRT).

Such a PDP device displays an image by using a gas discharge phenomenon generated when a high voltage is applied to the gas. The PDP device is used to prevent malfunctions of electromagnetic waves (ElectroMagnetic Interference (EMI), remote control, etc.) that are harmful to the human body due to the high voltage applied. Near Infrared Ray (NIR), and orange light, which generate negative light that adversely affects color purity, are generated.

In order to shield the electromagnetic waves, near infrared rays, neon light, etc., the PDP apparatus includes an optical filter for a display device in which a plurality of optical films having an electromagnetic shielding function, a near infrared shielding function, and a color correction function are stacked on a supporting substrate. . Among the optical filters, an electromagnetic shielding film having an electromagnetic shielding function requires an electrode so that electromagnetic waves generated on the display panel side of the PDP device can be emitted to the outside, and white silver, copper, and the like have been mainly used.

In addition, in order to make the outline of the screen of the PDP device clear, the PDP filter and the panel assembly are provided with a screen display layer for making the outline of the screen clear. Black ceramic is mainly used as a material which comprises such a screen display layer.

However, when forming black ceramics and separately forming electrodes, the thickness of the PDP filter may be increased, and a separate operation is required, and the process is complicated. When forming a multilayer film, the allowable working tolerance may be reduced. Can be.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide an optical filter for a display device having a ground electrode that shields electromagnetic waves while simultaneously defining a screen outline.

Another object of the present invention is to provide a display device including the optical filter for a display device as described above, which has a reduced thickness, a simple manufacturing process, and an increased tolerance for work.

Technical problems to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

An optical filter for a display device according to an embodiment of the present invention for achieving the technical problem is a first optical film comprising a transparent first optical substrate, and an electromagnetic shielding film formed on the front surface of the first optical substrate, and the electromagnetic wave A second electrode disposed on the ground electrode layer and including a ground electrode layer made of a black-based metal material formed along an edge of the shielding film, a transparent second optical base material, and an anti-reflection film formed on the front surface of the second optical base material. Optical films.

According to another aspect of the present invention, an optical filter for a display device includes a first optical film including a transparent first optical substrate and an electromagnetic shielding film formed on the front surface of the first optical substrate, and the transparent agent. A second optical film, an antireflection film formed on the front surface of the second optical base material, and a second optical film positioned on the front surface of the first optical film, side surfaces of the second optical film, and edges of the antireflection film. And a ground electrode contacting the electromagnetic shielding film and made of a black-based metal material.

An optical filter for a display device according to another embodiment of the present invention for achieving the technical problem is a ground electrode layer made of a transparent substrate, a black-based metal material formed along the edge of the transparent substrate, and An electromagnetic wave shielding film formed on the rear surface of the transparent substrate so as to contact the rear surface of the ground electrode layer, a transparent first optical substrate, and a first adhesive layer to attach the first optical substrate and the electromagnetic shielding film to the rear surface of the electromagnetic shielding film. It includes a first optical film positioned, a transparent second optical substrate, and an anti-reflection film formed on the front surface of the second optical substrate, and includes a second optical film located on the front surface of the transparent substrate.

According to another aspect of the present invention, there is provided a display apparatus including a panel assembly including a plurality of discharge cells in which gas discharge occurs, and an embodiment of the present invention for achieving the above technical problem. An optical filter for a display device, the optical filter for display device attached directly to the front surface of the panel assembly via an adhesive layer, and spaced apart a predetermined distance in front of the optical filter for display device, connected by the ground electrode and the conductive bar And a cabinet for discharging electromagnetic waves.

According to another aspect of the present invention, there is provided a display apparatus including a panel assembly including a plurality of discharge cells in which gas discharge occurs, and another embodiment of the present invention for achieving the above technical problem. An optical filter for a display device, the optical filter for display device attached directly to the front surface of the panel assembly via an adhesive layer, and spaced apart a predetermined distance in front of the optical filter for display device, connected by the ground electrode and the conductive bar And a cabinet for discharging electromagnetic waves.

According to another aspect of the present invention, there is provided a display apparatus including a panel assembly including a plurality of discharge cells in which gas discharge occurs, and another embodiment of the present invention for achieving the above technical problem. An optical filter for a display device, comprising: an optical filter for a display device disposed at a predetermined interval apart in front of the panel assembly through an adhesive layer, and disposed at a predetermined distance in front of the optical filter for the display device; It is connected by an electroconductive bar, and contains the cabinet which discharges an electromagnetic wave.

Specific details of other embodiments are included in the detailed description and the accompanying drawings.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the present embodiments are intended to complete the disclosure of the present invention, and the general knowledge in the art to which the present invention pertains. It is provided to fully convey the scope of the invention to those skilled in the art, and the present invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

The spatially relative terms " below ", " beneath ", " lower ", " above ", " upper " It can be used to easily describe the correlation of a device or components with other devices or components. Spatially relative terms are to be understood as including terms in different directions of the device in use or operation in addition to the directions shown in the figures. For example, when flipping a device shown in the figure, a device described as "below or beneath" of another device may be placed "above" of another device. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be oriented in other directions as well, in which case spatially relative terms may be interpreted according to orientation.

An optical filter for a display device according to embodiments of the present invention may be mounted on the front of the display device and used. Examples of such display devices include a plasma display panel (PDP) device, a liquid crystal display (LCD) device, a plasma address liquid cristal (PALC) device, an organic light emitting diode (OLED) device, a field emission display (FED) device, And a large display device such as a cathode ray tube (CRT), a small mobile display device such as a PDA (Personal Digital Assistants), a small game machine display window, a mobile phone display window, and a flexible display device. Preferably, the present invention is applied to PDP devices in which electromagnetic shielding and screen outlines need to be made clear. Hereinafter, for convenience of description, the present invention will be described using an optical filter for a PDP device and a display device used therefor. However, the present invention is not limited thereto, and the present invention is not limited thereto. Of course, it can be applied.

In the present specification, an optical filter for a display device may be simply referred to as a filter or an optical filter.

Hereinafter, an optical filter for a display device and a PDP device including the same according to embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a schematic exploded perspective view of a PDP apparatus including an optical filter according to embodiments of the present invention.

Referring to FIG. 1, a panel assembly including a case 10, a cabinet 40 covering an upper portion of the case, a driving circuit board 20 accommodated in the case 10, and a discharge cell in which gas discharge occurs. 30 and an optical filter 50 for a display device disposed in front of the panel assembly 30.

The panel assembly 30 includes a transparent front substrate (not shown) and a transparent back substrate (not shown), and display an image by light emission of discharge cells (not shown) separated by partition walls (not shown). do. The optical filter 50 may be disposed or directly attached to the panel assembly 30 at predetermined intervals, and fixedly mounted through the cabinet 40 or the case 10. The optical filter 50 includes at least one optical film layer (not shown) and is grounded to the cabinet 40 and / or the case 10.

As the optical filter 50, various optical filters according to embodiments of the present invention described below ('500' of FIGS. 2 and 3, '501' of FIGS. 5 and 6, and '502' of FIGS. 7 and 8). May be applied. Hereinafter, specific embodiments applicable to the optical filter 50 as described above will be described.

2 is an exploded view of an optical filter for a display device according to an exemplary embodiment, and FIG. 3 is a longitudinal cross-sectional view of FIG. 2.

Referring to FIGS. 2 and 3, the optical filter 500 for a display device may include a black-based metal formed along an edge of the first optical film 100 including the electromagnetic shielding film 130 and the electromagnetic shielding film 130. A ground electrode layer 200 made of a material, and a second optical film 300 positioned on the ground electrode layer 200.

The first optical film 100 includes a first adhesive layer 110, a first optical substrate 120, and an electromagnetic shielding film 130.

The first optical substrate 120 serves as a base substrate of the first optical film 100 to support the electromagnetic shielding film 130 and the like.

The first optical substrate 120 is required to have sufficient rigidity to support the electromagnetic shielding film 130 and the like. In addition, since the first optical substrate 120 is directly attached to the panel assembly described later, it is also required to have a sufficient thickness. The first optical substrate 120 may be made of a material having excellent transparency, and may be made of, for example, polyethylene terephthalate (PET).

An electromagnetic shielding film 130 is formed on the entire surface of the first optical substrate 120. The electromagnetic shielding film 130 may include a metal thin film (not shown) and a high refractive index transparent film (not shown) that are alternately stacked.

The metal thin film serves as an absorbing layer that absorbs electromagnetic waves emitted from the panel assembly described later.

The metal thin film is excellent in conductivity and infrared reflectivity, and is excellent in visible light transmittance when the multilayered layer is laminated, and a metal thin film such as gold, silver, copper, platinum, palladium, etc. may be used.

The metal thin film may be formed by sputtering, ion plating, vacuum deposition, plating, or the like.

The high refractive index transparent thin film has transparency to visible light, and serves to prevent reflection of visible light by the metal thin film due to a difference in refractive index with the metal thin film.

As the high refractive index transparent thin film layer, a material having a refractive index of 1.6 or more with respect to visible light may be used. For example, indium tin oxide (ITO), aluminum zinc oxide (AZO), indium oxide, tin tin oxide, zinc oxide, aluminum oxide, neodymium oxide, niobium oxide (Nb ₂ O ₅ ), or the like can be used.

The high refractive index transparent thin film may be formed using a method such as sputtering, ion plating, ion beam assist, vacuum deposition, and wet coating.

Such a metal thin film and a high refractive index transparent thin film can be laminated and used in a plurality of layers. For example, in the case of a filter using a high refractive index transparent thin film and an electromagnetic shielding film 130 in which metal thin films are formed four to six times in succession or having a light shielding pattern, the filter includes an external light shielding film (not shown). Sufficient electromagnetic shielding efficiency can be obtained even when the transparent thin film and the electromagnetic shielding film 130 in which the metal thin film is formed one to three times in succession. In addition, various thin films having an electromagnetic shielding function may be added between the high refractive transparent thin film and the metal thin film.

When the metal thin film and the high refractive index transparent thin film are laminated and used as the electromagnetic shielding film 130, the electromagnetic shielding film 130 can also shield near infrared rays.

The electromagnetic wave emitted from the panel assembly of the PDP device is absorbed by the electromagnetic shielding film 130, and the electromagnetic wave is discharged through the ground electrode layer 200, which will be described later.

The first adhesive layer 110 may be formed on the rear surface of the first optical substrate 120, and the optical filter 500 for the display device may be directly attached to the panel assembly described below via the first adhesive layer 110. .

The first adhesive layer 110 may be formed of, for example, a pressure-sensitive adhesive including a binder resin, a binder adhesive resin, and a crosslinking agent, and may optionally contain a color correction pigment.

A ground electrode layer 200 made of a black-based metal material is formed along the edge of the electromagnetic shielding film 130 of the first optical film 100.

The ground electrode layer 200 is electrically connected to the electromagnetic shielding film 130 to discharge the electromagnetic waves absorbed from the electromagnetic shielding film 130, and at the same time, the ground electrode layer 200 is made of a black-based metal material to serve to clarify the screen of the display device.

The ground electrode layer 200 may protrude along the front surface of the first optical film 100, that is, along the edge of the electromagnetic shielding film 130, and in this case, from the outermost edge of the electromagnetic shielding film 130 to secure a working tolerance. It may be formed spaced apart from a predetermined interval. Herein, the predetermined interval means 1 to 5 mm.

The black-based metal material constituting the ground electrode layer 200 may be formed by curing a paste shape including, for example, a metal powder having high conductivity, a powder of a black-based coloration material, and a binder.

The above-described metal powder serves to energize the electromagnetic shielding film 130 and the cabinet 40 to be described later to discharge the electromagnetic waves formed in the electromagnetic shielding film 130.

As such a metal powder, a metal with high conductivity such as silver, copper, aluminum, or the like may be used, and is not limited to a material when the conductivity is excellent.

The powder of the black-based toning material serves to enhance the color reproducibility by sharpening the screen outline of the display device.

As the powder of such a black-based coloration substance, for example, one such as nickel can be used. Materials such as nickel, when used in combination with metal powders, help the metal powders to exhibit a blackish color. The powder of the black-based toning substance described above is not limited to nickel powder, as long as it serves to help display the black-based color. The term black series as used herein includes, but is not particularly limited to, black, brown, gray, and the like as long as the screen outline can be clearly defined.

The above-mentioned binder combines these metal powders and powders of black-based color matter, and makes it easy to apply it by making it a mucus material.

As such a binder, for example, an adhesive polymer such as epoxy may be used.

The above-described metal powder, the black-based powder, and the binder may be mixed and used in a predetermined ratio in consideration of conductivity, color, and adhesive properties, and the metal powder and the black-based powder may include, for example. For example spherical particles.

The black-based metal material may be formed by curing a paste shape including the above-described metal powder, powder of the black-based toning material, and a binder. The ground electrode layer 200 made of a black-based metal material formed by curing the paste shape may be simplified. The black-based metal material is not limited to being formed by curing the above-described paste shape unless it is attached to the electromagnetic shielding film 130 through a complicated process.

In addition, the above-described black-based metal material may be formed by, for example, curing the black silver. That is, the black silver formed by mixing the silver powder having a very good conductivity and the nickel powder having a black color together with the binder serves to ground the electromagnetic shielding film 130 by silver and at the same time, the screen outline of the display device is made clear. It can also play a role.

The black silver may be spherical particles having a particle diameter of 1 to 10 μm. When the black silver is formed of spherical particles having a particle size of 1 to 10 μm, dispersibility may be excellent when the paste shape is applied onto the electromagnetic shielding film 130, and excellent conductivity of silver may be maintained.

The ground electrode layer 200 may be formed by applying the above-described black silver on the electromagnetic shielding film 130 by screen printing, for example.

The screen printing method is a method used for forming a fine circuit electrode by applying a paste shape through an opening of a mask, and screen-printing the black silver described above, and displaying a black color without complicated equipment. Can be formed.

Although the screen printing method has been described as an example of forming the ground electrode layer 200 made of the black-based metal material, it is not limited thereto. That is, the black-based metal material may be formed by directly attaching a tape formed when manufactured in another shape, for example, a tape shape.

4 is a plan view of an optical filter for a display device having a ground electrode according to an exemplary embodiment of the present invention.

Referring to FIG. 4, in the case of using the optical filter for a display device including the black-based ground electrode layer 200 described above, the ground electrode layer 200 may have a predetermined distance from an edge on the foremost surface of the first optical filter 100. For example, 1 to 5mm spaced apart, the screen outline of the display device can be made clear and at the same time it can act as an electromagnetic wave discharge.

The second optical film 300 is formed on the ground electrode layer 200.

The second optical film 300 includes a transparent second optical substrate 320 and an anti-reflection film 330 formed on the entire surface of the second optical substrate 320.

The second optical substrate 320 serves as a base substrate of the second optical film 300 to support the anti-reflection film 330.

The second optical substrate 320 may be made of a substrate substantially the same as the first optical substrate 120 described above, except that the second optical substrate 320 is thinner than the first optical substrate 120 and has a narrow area. Therefore, duplicate description thereof will be omitted.

An anti-reflection film 330 is formed on the entire surface of the second optical substrate 320. The anti-reflection film 330 improves image quality by preventing reflection of external light. The anti-reflection film 330 may include a material having a refractive index of 1.5 or less in the visible light region, for example, a fluorine-based transparent polymer resin, a silicone-based resin, silicon oxide, an acrylic resin, and the like, and may include two or more layers thereof. The anti-reflection film 330 may further include a material having other optical properties in addition to the low refractive index material as described above. The anti-reflection film 330 may be a coating film directly coated on the entire surface of the second optical substrate 320.

The anti-reflection film 330 may form the outermost side in the front direction of the optical filter 500, and a protective layer (not shown) or other functional layers may be further provided on the anti-reflection film 330.

The second adhesive layer 310 is formed on the rear surface of the second optical substrate 320, and the second optical substrate 320 is attached to the ground electrode layer 200 by the second adhesive layer 310. The second adhesive layer 310 is also directly bonded to the electromagnetic shielding film 130.

The second adhesive layer 310 may be made of, for example, a pressure sensitive adhesive including a binder resin, a binder adhesive resin, and a crosslinking agent.

In addition, the second adhesive layer 310 may be a color correction function-containing adhesive layer including a color correction pigment in the pressure-sensitive adhesive. As the color correction dyes, cyanine dyes, phthalocyanine dyes, porphyrin dyes, etc., which absorb neon wavelengths, may be used.

When the optical filter 500 for a display device according to an exemplary embodiment of the present invention is used, the black-based ground electrode layer 200 capable of discharging shielded electromagnetic waves while simultaneously clearing the screen of the display device may be a single layer. The thickness of the optical filter 500 for the display device can be reduced, the manufacturing process can be simplified, the cost can be reduced, and the allowable working tolerance can be increased.

Hereinafter, an optical filter for a display device according to another embodiment of the present invention will be described.

FIG. 5 is an exploded perspective view of an optical filter for a display device according to another exemplary embodiment, and FIG. 6 is a longitudinal cross-sectional view of FIG. 5. In the present embodiment, the same structure as in the embodiment of the present invention will be omitted or simplified, and will be described based on the differences.

5 and 6, the optical filter 501 for a display device according to the present embodiment includes a first optical film 101 including an electromagnetic shielding film 131, an antireflection film 331, and a first The second optical film 301 located on the front surface of the optical film 101 and the side surface of the second optical film 301 and the edge of the anti-reflection film 331 are in contact with the electromagnetic wave shielding film 131, and the black A ground electrode 201 made of a series of metal materials is included. In another embodiment of the present invention, the second optical film 301 is positioned in front of the first optical film 101, and the ground electrode 201 is formed on the side surface of the second optical film 301 and the anti-reflection film 331. Covering the edge, and different from the embodiment of the present invention in that it is formed in contact with the electromagnetic shielding film 131, will be described below with a focus on the differences.

Since the first optical film 101 is substantially the same as the first optical film 100 employed in the embodiment of the present invention, redundant description is omitted.

The second optical film 301 is positioned on the front surface of the first optical film 101, and is directly attached to the electromagnetic shielding film 131 through the second adhesive layer 311, by the ground electrode 201 as described below. Is covered. In addition, since the configuration of the second optical film 301, such as including an anti-reflection film 331, is substantially the same as the second optical film 300 employed in one embodiment of the present invention, redundant description thereof will be omitted.

The ground electrode 201 covers the side surface of the second optical film 301 and the edge of the anti-reflection film 331 and contacts the electromagnetic shielding film 131. That is, the ground electrode 201 is connected to the electromagnetic shielding film 131, the electromagnetic wave shielded by the electromagnetic shielding film 131 is discharged through the ground electrode 201, and is formed at the edge of the anti-reflection film 331 to display the display. Sharpen the screen of the device.

The ground electrode 201 may be spaced apart from the edge of the electromagnetic shielding film 131 by a predetermined distance, for example, 1 to 5 mm when contacted with the electromagnetic shielding film 131, but the outermost electrode 201 may increase the electromagnetic shielding efficiency by a large contact area. It can be applied to cover the entire edge.

In addition, a portion of the ground electrode 201 covering the entire surface of the anti-reflection film 331 may be, for example, a black-based metal material formed by curing black silver, but other portions, that is, the second optical film 301. The side and the contact portion of the electromagnetic shielding film 131 may be made of not only a black metal material but also other conductive metal.

Other than the configuration of the ground electrode 201, the coating method according to the screen printing and the like are the same as in the case of one embodiment of the present invention will not be repeated description.

The optical filter 501 for a display device according to another embodiment of the present invention includes a ground electrode 201 formed in the anti-reflection film 231, and thus the ground electrode 201 formed in a thin film different from that of the exemplary embodiment of the present invention. ) May be implemented with an optical filter 501 for a display device.

Hereinafter, an optical filter for a display device according to still another embodiment of the present invention will be described.

FIG. 7 is an exploded perspective view of an optical filter for a display device according to still another embodiment, and FIG. 8 is a longitudinal cross-sectional view of FIG. 7. In the present embodiment, the same structure as in the embodiment or the other embodiment of the present invention will be omitted or simplified description, and will be described based on the difference.

The optical filter 502 for a display device according to the present exemplary embodiment includes a transparent substrate 402 and a transparent substrate so as to contact the rear surface of the ground electrode layer 202 and the ground electrode layer 202 formed along the edge of the transparent substrate 402. An electromagnetic wave shielding film 412 formed on the rear surface of the 402, a first optical film 102 positioned on the rear surface of the electromagnetic wave shielding film 412, and a second optical film 302 positioned on the front surface of the transparent substrate 402. do.

Another embodiment of the present invention further includes a transparent substrate 402, and a ground electrode layer 202, an electromagnetic shielding film 412, and a first optical film 102 are sequentially attached to the rear surface of the transparent substrate 402. The second optical film 302 is different from one embodiment of the present invention in that it is disposed on the front surface of the transparent substrate 402.

The transparent substrate 402 supports the ground electrode layer 202, the first optical film 102, the second optical film 302, and the like, and is mounted on the display device, that is, the display screen of the PDP device in this embodiment. Have substantially the same shape and size.

The transparent substrate 402 is made of a transparent material so as not to excessively reduce the brightness of the display device. For example, glass substrates having good transparency, polyethylene terephthalate (PET), polycarbonate (PC), acrylic resins, and the like may be used, but mechanical strength is preferably limited. Excellent glass substrates can be used.

The ground electrode layer 202 may be formed on the rear surface of the transparent substrate 402 along the edge. The ground electrode layer 202 may be formed of a black-based metal material to be spaced apart from the outermost edge of the transparent substrate 402 by a predetermined distance, for example, 1 to 5 mm, to secure a work tolerance.

The ground electrode layer 202 is connected to the electromagnetic shielding film 412 to be described later serves to ground.

In addition, the structure, the coating method, and the like of the ground electrode layer 202 are the same as those of the exemplary embodiment of the present invention, and redundant description thereof will be omitted.

An electromagnetic shielding film 412 is disposed on the rear surface of the ground electrode layer 202. The electromagnetic shielding film 412 may be connected to the ground electrode layer 202 to discharge electromagnetic waves. The electromagnetic shielding film 412 includes a metal thin film and a high refractive index transparent thin film that are alternately stacked is the same as the case of one embodiment or the other embodiment of the present invention.

The first optical film 102 is positioned on the rear surface of the electromagnetic shielding film 412.

The first optical film 102 includes a transparent first optical substrate 122 and a first adhesive layer 142 formed on the entire surface of the first optical substrate 122.

Since the first optical substrate 122 is the base substrate of the first optical film 102 and is the same except that the first optical substrate 122 has a thinner thickness than that of the exemplary embodiment of the present invention, redundant description thereof will be omitted.

The color correction layer 112 may be formed on the rear surface of the first optical substrate 122. Cyanine-based dyes, phthalocyanine-based dyes, porphyrin-based dyes, and the like, which absorb neon wavelengths, may be used as the color-correcting dye for forming the color correction layer 112. The color correction layer 112 may be a second optical film, which will be described later. The color reproducibility can be further improved with the color correction function-containing second adhesive layer 312 of 302.

The first optical film 102 of the present embodiment further includes a first adhesive layer 142 on the foremost surface.

The first adhesive layer 142 allows the electromagnetic shielding film 412 and the first optical film 102 to be attached.

The first adhesive layer 142 may be made of a binder resin containing a conductive metal, a pressure-sensitive adhesive including a binder adhesive resin and a crosslinking agent.

The second optical layer 302 may be disposed on the front surface of the transparent substrate 402, and the second optical layer 302 may be disposed on the front surface of the transparent substrate 402 at a predetermined distance from an edge. The configuration and function of the second optical layer 302 are the same as in the case of one embodiment or the other embodiment of the present invention, and description thereof will be omitted.

When using the optical filter 502 for a display device including the black-based ground electrode layer 202 according to another embodiment of the present invention described above, the screen outline of the display device can be made clear and at the same time, it can act as an electromagnetic wave discharge. The black-based ground electrode layer 202 is formed as a single layer, which not only reduces the thickness of the optical filter 502 for the display device, simplifies the manufacturing process, and ensures work tolerances, but also the ground electrode layer 202 is provided on the panel assembly side. It can be formed in the to improve the reliability.

Hereinafter, a display apparatus using the optical filters 500, 501, and 502 for display apparatuses according to the exemplary embodiments of the present invention will be described with reference to the display apparatus optical filter 500 according to an exemplary embodiment. It will be apparent to those skilled in the art that a display device using an optical filter 501 or 502 for a display device according to another embodiment or another embodiment of the present invention can be implemented. In the present embodiment, the same structure as that of the optical filter 500 for a display device according to the embodiment of the present invention will be omitted or simplified, and will be described based on the differences.

9 is a longitudinal cross-sectional view of a display apparatus according to an embodiment of the present invention.

Referring to FIG. 9, the display apparatus 700 according to the exemplary embodiment of the present invention is a panel assembly 600, the optical filter 500 for the display apparatus according to the exemplary embodiment of the present invention described above, and through an adhesive layer. An optical filter 500 for display device directly attached to the front surface of the panel assembly, and a cabinet disposed at a predetermined interval apart on the front surface of the optical filter 500 for display device, and connected to the ground electrode layer 200 to discharge electromagnetic waves ( 40).

The optical filter 500 for the display device may be directly attached to the front surface of the panel assembly 600 through the first adhesive layer 110.

The first adhesive layer 110 may be formed of a pressure-sensitive adhesive, and may further include functional dyes such as color correction dyes and near-infrared blocking dyes as necessary.

Electromagnetic waves generated by the display apparatus 700 according to the present invention are shielded by the electromagnetic shielding film 130. The shielded electromagnetic wave is discharged through the cabinet 40 connected by the ground electrode layer 200 and the conductive bar 220 via the ground electrode layer 200 disposed on the electromagnetic shielding film 130.

The cabinet 40 is spaced apart from the front surface of the optical filter 500 for display device, that is, the front surface of the ground electrode layer 200 by a predetermined interval, to protect the entire display device 700 and to discharge the shielded electromagnetic wave. . Specifically, the cabinet 40 may be electrically connected by the ground electrode layer 200 and the conductive bar 220 to discharge electromagnetic waves. Herein, the predetermined interval means 1 to 5 mm.

This cabinet 40 may be configured as a plastic sheath comprising a conductive metal, and is not particularly limited to the material.

The conductive bar 220 serves to electrically connect the cabinet 40 and the ground electrode layer 200, and is not limited in shape.

The conductive bar 220 includes a metal or other conductive material as long as the material has good conductivity, and is not limited to the material.

In the display apparatus 700 according to the present exemplary embodiment, the ground electrode layer 200 for sharpening the screen outline is formed as a single layer, and the screen electrode 700 serves to discharge the electromagnetic waves at the same time. The formed display device 700 has a simple manufacturing process, an allowable work tolerance increases, and of course, the thickness of the display device 700 decreases.

Although not shown, the display device according to another embodiment of the present invention is a panel assembly, an optical filter for a display device according to another embodiment of the present invention, which is directly attached to the front of the panel assembly via an adhesive layer. And a cabinet disposed on the front surface of the optical filter for display device and spaced apart from each other by a predetermined interval, and connected by a ground electrode and a conductive bar to discharge electromagnetic waves. The display device of this embodiment differs from the display device according to an embodiment of the present invention in that the ground electrode is located near the cabinet and the length of the conductive bar is short. In this embodiment, the predetermined interval is 1 to 5 mm.

An optical filter for a display device according to another exemplary embodiment of the present invention may also be directly attached to the front surface of the panel assembly through the first adhesive layer, and the description thereof will be omitted because other configurations and functions are the same.

Since the distance from the cabinet to the ground electrode is short and the length of the conductive bar is also short, the connection between the conductive bar and the ground electrode can be stabilized.

In addition, although not shown, the display device according to another embodiment of the present invention is a panel assembly, an optical filter for a display device according to another embodiment of the present invention, a display device disposed at a predetermined interval spaced in front of the panel assembly. And a cabinet that is spaced apart at a predetermined interval in front of the optical filter for display device and connected by a ground electrode layer and a conductive bar to discharge electromagnetic waves. The present embodiment differs from the previous embodiments in that an optical filter for a display device using a transparent substrate is used, and that the above-described filter is disposed spaced apart from the panel assembly by a predetermined distance.

In the present embodiment, the above-described optical filter and the panel assembly for the display apparatus are disposed spaced apart from each other by a predetermined interval, for example, the predetermined interval may be 1 to 5 mm.

In addition, the cabinet described above may be arranged spaced apart from the filter for display device, for example, 1 ~ 5mm.

The other embodiments or the other embodiments described above are examples that can be modified by those skilled in the art from the display device according to the embodiment of the present invention.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments but may be manufactured in various forms, and having ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

As described above, according to embodiments of the present invention, an optical filter for a display device and a display device including the same have one or more of the following effects.

First, it is possible to provide an optical filter for a display device having a ground electrode (layer) for clearing the screen outline and shielding electromagnetic waves, and a display device including the same.

Second, by using the black-based ground electrode (layer) of one layer, it is possible to provide an optical filter for a display device having a reduced thickness and an increased allowable working tolerance and a display device including the same.

Third, the ground electrode (layer) may be formed of a black-based metal material formed by applying and curing a paste to provide an optical filter for a display device and a display device including the same.

Claims (21)

A first optical film comprising a transparent first optical substrate and an electromagnetic shielding film formed on the entire surface of the first optical substrate; A ground electrode layer formed on the front surface of the electromagnetic shielding film along an edge and made of a metal paste including a conductive metal powder, a black-based toning material powder, and a binder; And And a transparent second optical substrate bonded by an adhesive layer formed to cover a part of the ground electrode layer, and an anti-reflection film formed on the entire surface of the second optical substrate. delete According to claim 1, The conductive metal powder is silver powder, and the black-based tonal substance powder is nickel powder. The method of claim 3, An optical filter for display device, wherein the silver powder has spherical particles having a particle diameter of 1 to 10 μm. According to claim 1, And the ground electrode layer is formed by screen printing. According to claim 1, The first optical film further comprises a first adhesive layer formed on the rear surface of the first optical substrate. According to claim 1, The electromagnetic shielding film is an optical filter for a display device comprising a metal thin film and a high refractive index transparent thin film laminated alternately. According to claim 1, And the ground electrode layer is spaced inward from the outermost edge of the electromagnetic shielding film. A first optical film comprising a transparent first optical substrate and an electromagnetic shielding film formed on the entire surface of the first optical substrate; A second optical film including a transparent second optical substrate and an anti-reflection film formed on the front surface of the second optical substrate, and positioned on the front surface of the first optical film; And And a ground electrode covering a side surface of the second optical film and an edge of the anti-reflection film and in contact with the electromagnetic wave shielding film and comprising a black-based metal material. The method of claim 9, The black-based metal material is an optical filter for a display device formed by curing a paste shape including a highly conductive metal powder, a black-based coloring material powder, and a binder. The method of claim 9, The black-based metal material is an optical filter for a display device formed by curing black silver. The optical filter for display device according to claim 9, wherein the ground electrode is formed by a screen printing method. The method of claim 9, The electromagnetic shielding film is an optical filter for a display device comprising a metal thin film and a high refractive index transparent thin film laminated alternately. Transparent substrates; A ground electrode layer formed on a rear surface of the transparent substrate along an edge and made of a metal paste including a conductive metal powder, a black-based toning material powder, and a binder; A transparent first optical substrate and a front surface of the first optical substrate A first optical film including an electromagnetic shielding film and bonded to the electromagnetic shielding film by a first adhesive layer formed to cover a part of the ground electrode layer; And A second transparent optical substrate, and an anti-reflection film formed on the front surface of the second optical substrate, and the rear surface of the second optical substrate includes a second optical film bonded to the front surface of the transparent substrate by a second adhesive layer. Optical filter for display devices. 15. The method of claim 14, The black-based metal material is an optical filter for a display device formed by curing a paste shape including a highly conductive metal powder, a black-based coloring material powder, and a binder. 15. The method of claim 14, The black-based metal material is an optical filter for a display device formed by curing black silver. The optical filter for display device according to claim 14, wherein the ground electrode layer is formed by a screen printing method. 15. The method of claim 14, The electromagnetic shielding film is an optical filter for a display device comprising a metal thin film and a high refractive index transparent thin film laminated alternately. A panel assembly including a plurality of discharge cells in which gas discharge occurs; An optical filter for a display device according to any one of claims 1 to 8, comprising: an optical filter for a display device directly attached to the front surface of the panel assembly via an adhesive layer; And And a cabinet disposed in front of the optical filter for display device, the cabinet being connected to the ground electrode layer by a conductive bar to discharge electromagnetic waves. A panel assembly including a plurality of discharge cells in which gas discharge occurs; An optical filter for display device according to any one of claims 9 to 13, comprising: an optical filter for display device directly attached to the front surface of the panel assembly via an adhesive layer; And And a cabinet disposed in front of the optical filter for display device at predetermined intervals, the cabinet being connected to the ground electrode layer by a conductive bar to discharge electromagnetic waves. A panel assembly including a plurality of discharge cells in which gas discharge occurs; 19. An optical filter for a display device according to any one of claims 14 to 18, wherein the optical filter for display device is spaced apart at a predetermined interval in front of the panel assembly; And And a cabinet disposed in front of the optical filter for display device at predetermined intervals, the cabinet being connected to the ground electrode layer by a conductive bar to discharge electromagnetic waves.

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