KR20080095966A - Optical member for display apparatus and filter for display apparatus having the same - Google Patents

Abstract

An optical member for display apparatus and filter is provided to improve brightness by absorbing external light efficiently and concentrating internal light into the inside of a display. A optical pattern is composed of a plurality of unit patterns equipped with electromagnetic shielding unit(344) includes a conductive material and external light shielding unit(342) including a transparent resin and light absorbing material. The one side of unit pattern(340) is a wedge, trapezoid and U type or a circular type. The external light shielding unit is formed on the unit pattern and electromagnetic shielding unit is formed under the unit pattern.

Description

Optical member for display apparatus and filter for display apparatus including same {Optical member for display apparatus and filter for display apparatus having the same}

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

2 is a cross-sectional view illustrating a PDP filter according to an embodiment of the present invention.

3 is a cross-sectional view showing an optical member according to an embodiment of the present invention.

4 is a cross-sectional view illustrating an optical member according to another exemplary embodiment of the present disclosure.

[Description of Major Symbols in Drawing]

100: PDP device 110: case

120: drive circuit board 130: panel assembly

140: PDP filter 150: cover

200: PDP filter 210: transparent substrate

220: electromagnetic shielding layer 230: optical member

232: substrate 234: optical pattern

240: color correction layer 250: reflective ring layer

280: light incident on the panel 290: external ambient light

300, 400: optical member 320, 420: substrate

340 and 440: unit patterns 342 and 442: external light shielding part

344, 444: electromagnetic shield

The present invention relates to an optical member for a display device and a filter for a display device including the same, and more particularly, to improve contrast ratio and brightness in a bright room, and to widen a viewing angle. The present invention relates to an optical member for a display device that can also perform an electromagnetic shielding function and a filter for a display device including the same.

As the modern society is highly informationized, image display-related parts and devices have been remarkably advanced and disseminated. Among them, display apparatuses for displaying images are widely used for television apparatuses, monitor devices for personal computers, and the like, and thinning is progressing at the same time as these displays are enlarged.

In general, a plasma display panel (PDP) device is in the spotlight as a next-generation display device because it can satisfy both an enlargement and a thinning at the same time as a cathode ray tube (CRT) representing a conventional display device. The PDP apparatus displays an image using a gas discharge phenomenon, and is excellent in various display capabilities such as display capacity, brightness, contrast, afterimage, viewing angle, and the like. In addition, the PDP device is easier to be enlarged than other display devices, and is considered as a thin light emitting display device having the most suitable characteristics as a high quality digital television in the future.

The PDP device generates a discharge in the gas between the electrodes by a direct current or an alternating current voltage applied to the electrode, and excites the phosphor by the radiation of ultraviolet rays, which emits light.

However, due to its driving characteristics, the PDP device has a high emission amount of electromagnetic waves and near infrared rays, high surface reflection of the phosphor, and color purity of the PDP device due to the orange light emitted from the encapsulated helium (He) or xenon (Xe), which does not reach the cathode ray tube. There is this.

Therefore, electromagnetic waves and near-infrared rays generated in the PDP device may adversely affect the human body and cause malfunction of precision devices such as a wireless telephone or a remote controller. In order to use such a PDP apparatus, it is required to suppress the emission of electromagnetic waves and near-infrared rays emitted from the PDP apparatus below a predetermined value. To this end, in order to shield electromagnetic waves and near infrared rays, and to reduce reflected light and improve color purity, a PDP filter having a function such as electromagnetic shielding, near infrared shielding, light surface reflection prevention and / or color purity improvement is employed.

The PDP filter is manufactured by stacking several functional films such as an electromagnetic shielding layer, a near infrared shielding layer, and a neon light shielding layer by an adhesive or an adhesive. A double electromagnetic shielding layer is a mesh type using a metal mesh and a conductive film using a conductive film. There is a type.

Of these, the conductive film type is manufactured by laminating a metal layer made of metal and a transparent layer having a high refractive index. In order to increase electromagnetic wave shielding efficiency, it is generally formed by laminating metal layers 3 to 6 times. However, the process of laminating the metal layer for manufacturing the electromagnetic wave shielding layer of the conductive film type is a thin film deposition process, which requires a very long time and the visible light transmittance of the entire film decreases as the process is repeated, resulting in a decrease in luminance. In addition, as the number of metal layers increases, manufacturing time increases and manufacturing cost increases.

Therefore, it is necessary to efficiently design a thin film deposition process by reducing the number of metal layer deposition in the conductive film type electromagnetic shielding (EMI) shielding functional layer, and at the same time, the electromagnetic shielding function that can increase not only the electromagnetic shielding efficiency but also the visible light transmittance of the film The development of the PDP filter which applied the included optical member is calculated | required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an optical member for a display device having an electromagnetic wave shielding function and an external light absorbing function at the same time and having an efficient manufacturing process.

The present invention also aims to provide a filter for a display device comprising the optical member.

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

The optical member according to an aspect of the present invention includes a substrate made of a transparent resin material and an optical pattern having a plurality of unit patterns formed on one surface of the substrate and filled with a light absorbing material and a conductive material.

The cross section of the unit pattern may be wedge shaped, trapezoidal shaped, U shaped or semicircular.

The external light shielding portion may be formed above the unit pattern, the electromagnetic shielding portion may be formed below the unit pattern, on the contrary, the electromagnetic wave shielding portion is formed above the unit pattern, and the external light shielding portion It may be formed under the unit pattern.

The conductive material may be metal particles having an average particle diameter of 15 μm or less. The light absorbing material may be carbon black, and the conductive material may be at least one material selected from the group consisting of carbon nanotubes, metal powders, and metal oxide powders. The metal powder may include at least one metal selected from the group consisting of cobalt, aluminum, zinc, zirconium, platinum, gold, palladium, titanium, iron, tin, indium, nickel, molybdenum, tungsten, silver and copper. The metal oxide may be at least one material selected from the group consisting of copper oxide, zinc oxide, indium oxide, tin oxide, indium tin oxide, aluminum zinc oxide, and indium zinc oxide.

Alternatively, the conductive material may be polythiophene, polypyrrole, polyaniline, poly (3,4-ethylenedioxythiophene), poly (3-alkylthiophene), polyisothianaphthene, poly (p-phenylenevinylene ), Poly (p-phenylene) and derivatives thereof may be at least one polymer material selected from the group consisting of.

A filter for a display device according to an aspect of the present invention is formed by stacking a plurality of functional members, wherein any one of the functional members is formed on i) a transparent resin substrate and ii) one surface of the substrate. And an optical pattern including a plurality of unit patterns each having an external light shielding part including a light absorbing material and an electromagnetic shielding part including a conductive material.

The plurality of functional members may independently perform an electromagnetic shielding function, a color correction function, an antireflection function, or the like, or may perform a combined function. At least one functional member of the functional member includes at least one pigment that selectively absorbs light, the pigment is cyanine-based, anthraquinone-based, naphthoquinone-based, phthalocyanine-based, naphthalocyanine-based, dimonium-based, And at least one of nickel dithiol based, azo based, stryl based, phthalocyanine based and methine based dyes.

A filter for a display device according to another aspect of the present invention includes a transparent substrate, an electromagnetic wave shielding layer, an optical member, a color correction layer, and an antireflection layer. The electromagnetic wave shielding layer is formed on one surface of the substrate and includes a conductive film in which a metal thin film and a metal oxide thin film are laminated one to three times, and the optical member is formed on the electromagnetic shielding layer, i) a substrate made of a transparent resin material And ii) an optical pattern formed on one surface of the substrate, the optical pattern including an external light shielding part including a light absorbing material and an electromagnetic shielding part including a conductive material. The color correction layer is formed on the optical member and contains a pigment that absorbs light of a specific wavelength band, and the antireflection layer is formed on the other surface of the substrate.

The display device used in the present invention is a plasma display panel (PDP) device, an organic light emitting diode (OLED) device, a liquid crystal display (LCD) device, or a field emission device that implements RGB with pixels of a grid pattern. Display) can be applied to various devices. Hereinafter, the present invention will be described using a PDP device and a PDP filter used for convenience of description, but the present invention is not limited thereto and may be applied to the aforementioned various display devices and filters for display devices used therein.

Hereinafter, a PDP apparatus and a PDP filter according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

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

Referring to FIG. 1, a structure of a PDP device 100 according to an embodiment of the present invention may include a case 110, a cover 150 covering an upper portion of the case 110, and a driving circuit accommodated in the case 110. The substrate 120 includes a panel assembly 130 including a discharge cell in which a gas discharge phenomenon occurs, and a PDP filter 140.

The PDP filter 140 is disposed above the front substrate of the panel assembly 130. The PDP filter 140 may be spaced apart from the front substrate of the panel assembly 130 or may be disposed in contact with each other. Also, the PDP filter 140 may have side effects such as foreign substances introduced between the panel assembly 130 and the PDP filter 140. To prevent or reinforce the strength of the PDP filter 140 itself may be combined with the front substrate and the adhesive or adhesive.

The PDP filter 140 includes a conductive layer formed of a material having excellent conductivity on the transparent substrate, and the conductive layer is grounded to the case 110 through the cover 150. That is, before the electromagnetic wave generated from the panel assembly 130 reaches the user, it is grounded to the cover 150 and the case 110 through the conductive layer of the PDP filter 140. Discharge gas is enclosed in the discharge cell, and Ne-Xe gas, He-Xe gas, etc. can be used as discharge gas, for example. The panel assembly basically has a light emitting principle such as a fluorescent lamp, and the ultraviolet rays emitted from the discharge gas are converted into visible light by exciting the phosphor layer in the panel assembly with the discharge in the light emitting cell.

2 is a cross-sectional view illustrating a PDP filter according to an embodiment of the present invention.

Referring to FIG. 2, the PDP filter 200 includes functional optical members having various shielding functions on the transparent substrate 210, and the functional optical members include an electromagnetic shielding layer 220, an optical member 230, and color correction. Layer 240, antireflective layer 250, and the like.

Based on the transparent substrate 210, the electromagnetic shielding layer 220, the optical member 230, and the color correction layer 240 are disposed in the direction toward the panel assembly, and the other side of the substrate, that is, the external environment. The antireflection layer 250 is disposed in the direction in which the light 290 is incident.

The present invention is not limited thereto, and the transparent substrate 210, the electromagnetic shielding layer 220, the optical member 230, the color correction layer 240, and the anti-reflection layer 250 may be stacked in any order. One optical member may perform two or more functions in combination.

Examples of the material of the transparent substrate 210 may include an inorganic compound molding such as glass and quartz and a transparent organic polymer molding. Acrylic or polycarbonate is generally used as the transparent substrate 210 formed of the organic polymer molded product, but the present invention is not limited to these embodiments. The transparent substrate 210 preferably has high transparency and heat resistance, and a polymer molded product and a laminate of the polymer molded product may be used as the transparent substrate 210. As for the transparency of the transparent substrate 210, it is advantageous that the visible light transmittance is 80% or more, and in terms of heat resistance, the glass transition temperature is preferably 50 ° C or more. The polymer molded article may be transparent in the visible wavelength range, and polyethylene terephthalate (PET) is preferable in terms of cost, heat resistance, and transparency, but is not limited thereto. In addition, in some cases, the transparent substrate 210 may be excluded from the configuration of the filter.

The anti-reflection layer 250 prevents the external environment light 290 incident from the viewer direction to be reflected back to the outside, thereby improving the contrast ratio of the display. In the present embodiment, the anti-reflection layer 250 is formed on the other surface of the transparent substrate 210, but the present invention is not limited to this stacking order. Preferably, as shown in FIG. 2, the anti-reflection layer 250 is formed on the side facing the viewer when the PDP filter 200 is mounted on the PDP device, that is, on the side opposite to the panel assembly side.

The electromagnetic shielding layer 220 serves to block electromagnetic waves generated from the panel assembly. In order to shield the electromagnetic waves, the surface of the display needs to be covered with a highly conductive object. As the electromagnetic wave shielding layer 220 for shielding electromagnetic waves according to an embodiment of the present invention, a multilayer transparent conductive film including a conductive mesh film or a metal thin film and a high refractive index transparent thin film may be used. As the conductive mesh film, generally, a metal mesh ground or a metal coating on a mesh of synthetic resin or metal fiber can be used. As a material of the metal which comprises a conductive mesh film, if the metal which is excellent in electroconductivity and workability, such as copper, chromium, nickel, silver, molybdenum, aluminum, can be used, for example.

In addition, the multilayer transparent conductive film may be a high refractive transparent thin film represented by indium tin oxide (ITO) to shield the electromagnetic waves. Examples of the multilayer transparent conductive film include a multilayer thin film in which metal thin films such as gold, silver, copper, platinum, and palladium are alternately stacked with high refractive index transparent thin films such as indium oxide, ditin oxide, and zinc oxide.

Although not shown, the PDP filter 200 according to an embodiment of the present invention may separately include a near infrared shielding layer. The near-infrared shielding layer serves to shield strong near-infrared rays generated from the panel assembly causing malfunction of electronic devices such as wireless telephones and remote controls.

In the embodiment of the present invention, when the electromagnetic shielding layer 220 uses a multilayer transparent conductive film in which a metal thin film and a high refractive index transparent thin film are stacked, the multilayer transparent conductive film shields near infrared rays. Therefore, in this case, two functions of shielding near infrared rays and electromagnetic waves may be performed using only the electromagnetic shielding layer 220 without separately forming the near infrared shielding layer. In this case, of course, the near-infrared shielding layer may be formed separately.

The PDP filter 200 includes a color correction layer 240 for selectively absorbing light of a specific wavelength band. The color correction layer 240 is positioned on one surface of the optical member 230 in the direction of the panel assembly, but is not limited thereto. The color correction layer 240 reduces or adjusts the amount of red (R), green (G), and blue (B) to change or correct the color balance to increase the color reproduction range of the display and improve the sharpness. .

The color correction layer 240 includes various pigments, and as the pigments, dyes or pigments may be used. Kinds of pigments include organic pigments having a neon light shielding function such as anthraquinone, cyanine, azo, stryl, phthalocyanine and methine, but the present invention is not limited thereto. Since the type and concentration of the dye are determined by the absorption wavelength, absorption coefficient, and transmission characteristics required in the display, the dye is not limited to a specific value and is not used.

In addition, although not shown, the PDP filter 200 may include a diffusion layer. The diffusion layer prevents moiré or newtoning, which may occur due to interference between incident light and reflected light, when the periodic pattern of the optical member 230 or the electromagnetic shielding layer 220 is reflected on the front substrate of the panel assembly. Do it. The diffusion layer may be disposed at any position in the PDP filter 200, but is preferably formed on one surface of the PDP filter 200 adjacent to the panel assembly. The diffusion layer may be included in the PDP filter 200 as a separate layer, or may be included in combination with other optical members.

The optical member 230 includes a substrate 232 made of a transparent resin material and an optical pattern 234 formed on one surface of the substrate 232 and formed of a plurality of wedge-shaped unit patterns. The optical pattern 234 is made of a wedge-shaped stripe, that is, a triangular prism structure having a plurality of intaglio three-dimensional shapes, but the present invention is not limited thereto, and the optical pattern may be embossed or two-dimensional in an engraved form. Or it may have a three-dimensional shape.

The optical member 230 is disposed on an opposite surface of the anti-reflection layer 250 with respect to the transparent substrate 210. However, the present invention is not limited thereto, and as long as the optical member 230 is disposed so that absorption of the external environment light 290 and transmission of the panel incident light 280 can occur well, the stacking order and the stacking direction between the optical members are It can be variously modified.

In the present embodiment, the optical pattern 234 has a wedge-shaped bottom surface of the unit pattern parallel to one surface of the substrate facing the panel assembly, but the present invention is not limited thereto. That is, the wedge-shaped bottom surface of the optical pattern 234 parallel to one surface of the substrate 232 may face the viewer, and the optical pattern may be formed on both surfaces of the substrate.

The substrate 232 is a plate-like support made of a transparent material that transmits visible light, and may include polyethylene terephthalate (PET), acrylic, polycarbonate (PC), urethane acrylate (Urethane Acrylate), It may be made of polyester, epoxy acrylate, brominated acrylate, polyvinyl chloride (PVC), and the like.

The optical member 230 absorbs external light to prevent external environment light 290 from entering the panel assembly and totally reflects the panel incident light 280 emitted from the panel assembly toward the viewer. Thus, a high transmittance to visible light and a high contrast ratio can be obtained. In addition, the optical member 230 according to the present invention includes an external light shielding part filled with the light absorbing material and an electromagnetic wave shielding part filled with the conductive material at the same time, thereby performing an electromagnetic shielding function.

When using the optical member 230, the electromagnetic shielding layer 220 is formed on the opposite side of the transparent substrate 210 on the basis of the optical member, the optical member 230 may perform the electromagnetic shielding function, As the conductive film in which the metal thin film and the metal oxide thin film are laminated one to three times, an electromagnetic shielding layer 220 having a sheet resistance of 0.8 Ω / □ or less may be used. That is, even if the number of thin films less than three to six times the normal number of stacking is laminated, it is possible to sufficiently perform the electromagnetic shielding function of the filter 200.

In this embodiment, the optical members corresponding to the electromagnetic wave shielding function, the antireflection function, and the color correction function are separately described as separate ones, but the present invention is not limited thereto. In particular, the optical member 230 of the present invention contains a light absorbing material and a conductive material at the same time can perform the electromagnetic shielding function and the external light shielding function at the same time, as described above to complement the function of the electromagnetic shielding layer 220 Or it can play a role in strengthening. In addition, since the optical member 230 replaces the electromagnetic shielding layer 220, the filter may not include the electromagnetic shielding layer.

Hereinafter, the optical member will be described in more detail, and descriptions overlapping with the aforementioned contents will be omitted.

3 is a cross-sectional view showing an optical member according to an embodiment of the present invention.

Referring to FIG. 3, the optical member 300 includes a substrate 320, a plurality of unit patterns 340 including the external light shielding part 342 and the electromagnetic shielding part 344. The cross section of the unit pattern 340 may have a wedge shape, but the cross section of the unit pattern according to the present invention may have a trapezoidal shape, a U shape, a semicircular shape, or the like.

The optical member 300 forms an intaglio pattern having a predetermined shape on one surface of the substrate 320 made of a transparent resin material, and then fills a resin containing a conductive material inside the intaglio pattern to shield the electromagnetic wave 344. ), And filled with a resin containing a light absorbing material on the electromagnetic shielding portion 344 to form an external light shielding portion 342, followed by curing the resin component.

As a general pattern forming method, a heat press method for pressing a mold to be heated to a thermoplastic resin, a casting method in which a thermoplastic resin composition is injected into a mold and solidified, an injection molding method, or a UV method in which an ultraviolet curable resin composition is injected into a molding mold and UV cured Etc. The pattern may be variously formed by a mold, and generally forms a wedge-shaped pattern. A resin containing colored particles such as carbon black and a conductive material is filled on the transparent substrate on which the pattern is formed by a wiping method and then cured.

In the unit pattern 340, the external light shielding portion 342 and the electromagnetic shielding portion 344 are divided into two stages in a direction perpendicular to one surface of the substrate 320, but the present invention is not limited thereto. The external light shielding portion 342 and the electromagnetic wave shielding portion 344 may be divided into two or more stages.

As the light absorbing material filled in the external light shielding portion 342, a carbon-based material such as carbon black may be used, and may be used as long as a black inorganic material or an organic material.

The conductive material filled in the electromagnetic shielding portion 344 is characterized in that the metal particles having an average particle diameter of 15㎛ or less. This is because the width of the bottom surface of the unit pattern 340 exposed to the outside of the substrate 320 is generally 20 to 32 μm, so that the smaller the particle size, the easier the filling.

The conductive material may be at least one material selected from the group consisting of carbon nanotubes, metal powders and metal oxide powders.

The metal powder may include at least one metal selected from the group consisting of cobalt, aluminum, zinc, zirconium, platinum, gold, palladium, titanium, iron, tin, indium, nickel, molybdenum, tungsten, silver and copper. Among them, silver (Ag) is preferably used because of its excellent conductivity, infrared reflectance and visible light transmittance, but due to its low chemical and physical stability and deterioration due to pollutants, water vapor, heat and light of the surrounding environment, Alloys containing at least one metal stable in the surrounding environment such as gold, platinum, palladium, copper, indium and tin can also be preferably used.

The metal oxide may be copper oxide, aluminum oxide, zinc oxide, indium oxide, tin oxide, indium tin oxide (ITO), aluminum zinc oxide (AZO), and indium zinc oxide (IZO). At least one material selected from the group consisting of The metal oxide satisfies transparency and electrical conductivity at the same time.

Alternatively, the conductive material may be polythiophene, polypyrrole, polyaniline, poly (3,4-ethylenedioxythiophene) (poly (3,4-ethylene deoxythiophene)), poly (3- Poly (3-alkylthiophene), Polyiso-thianaphthene, Poly (p-phenylene vinylene), Poly (p-phenylene) (Poly (p-phenylene)) and at least one polymer material selected from the group consisting of derivatives thereof.

As the polymer resin filled in the unit pattern 340, an ultraviolet curable resin or a thermosetting resin may be used, and an acrylic resin such as polymethyl methacrylate (PMMA) may be used. In addition, the polymer resin may be used alone, or may be used in a mixed form with a solvent, and may further include an additive. The additive serves as a dispersant to stably disperse the conductive material and the light absorbing material in a solvent. As the dispersant, an organic acid series having a carboxyl group such as citric acid (CA), polyacrylic acid (PAA) or a salt thereof, a copolymer, or the like is used. The dispersants may be used alone or in combination of two or more.

The external light shielding portion 342 is formed of a polymer resin and a light absorbing material, but may also include some conductive material. That is, the external light shielding portion 342 may include a light absorbing material and a conductive material in a volume ratio of 9: 1 to 7: 3. In this case, the main function of the external light shielding unit 342 is external light shielding, but additionally, the electromagnetic shielding function can be efficiently performed by electrically connecting the electromagnetic shielding units 344 positioned under the unit pattern 342.

Similarly, the electromagnetic shielding portion 344 is formed of a polymer resin and a conductive material, but may include a part of a light absorbing material. That is, the electromagnetic shielding portion may include a light absorbing material and a conductive material in a volume ratio of 1: 9 to 3: 7. In this case, the main function of the electromagnetic shielding unit 344 is electromagnetic shielding, but it can additionally perform an external light shielding function.

In addition, the present invention includes not only the case where the concentrations of the light absorbing material and the conductive material are constant in the external light shielding portion 342 and the electromagnetic wave shielding portion 344, but also the case where the concentration is uneven or the concentration changes in stages. .

The optical member 300 may further increase electromagnetic wave shielding efficiency by forming electrodes with conductive materials at both ends of the optical pattern including the unit pattern 340.

4 is a cross-sectional view illustrating an optical member according to another exemplary embodiment of the present disclosure. With respect to the optical member according to the present embodiment, a description overlapping with the above description will be omitted.

Referring to FIG. 4, the optical member 400 includes a substrate 420, a plurality of unit patterns 440 including the external light shielding portion 442 and the electromagnetic shielding portion 444. The optical member 400 forms an intaglio pattern having a predetermined shape on one surface of the substrate 420 made of a transparent resin material, and then fills a resin containing a light absorbing material inside the intaglio pattern to protect the external light shielding unit ( 442) and filling the external light shielding portion with a resin containing a conductive material to form the electromagnetic wave shielding portion 444, followed by curing the resin component.

As shown in FIG. 4, when the electromagnetic shielding part 444 is formed on the top of the external light shielding part 442 in the unit pattern 440, and as in FIG. 3, the electromagnetic shielding part 344 in the unit pattern 340. ) Is formed at the lower end of the external light shielding portion 342, and similarly exhibits electromagnetic wave shielding and external light shielding effects. Accordingly, the external light shielding and the electromagnetic shielding efficiency of the optical members 300 and 400 have a great influence on the stacking order between the external light shielding parts 342 and 442 and the electromagnetic shielding parts 344 and 444 in the unit patterns 340 and 440. Do not receive. However, as the total content of the conductive material filled in the unit patterns 340 and 440 increases, the sheet resistance of the optical members 300 and 400 decreases, thereby increasing the electromagnetic shielding efficiency.

Therefore, in order to optimize the external light shielding efficiency and the electromagnetic shielding efficiency of the optical member of the present invention, the relative volume ratio between the external light shielding portion and the electromagnetic shielding portion in the unit pattern can be adjusted, and the light filled in the external light shielding portion The content of the absorbing material and the conductive material filled in the electromagnetic shield may be adjusted.

As described above, the optical member for a display device according to the present invention may simultaneously perform an electromagnetic shielding function as well as an external light shielding function. That is, the optical member enables efficient absorption of external environmental light, widens the viewing angle, improves brightness by condensing the internal light of the display, and increases contrast ratio in bright room conditions. In addition, since the optical member may perform an electromagnetic shielding function, when the conductive film type electromagnetic shielding layer is used in the filter for the display device, the number of stacking of thin films in the electromagnetic shielding layer may be reduced, thereby filtering the display device. It can lower the manufacturing cost of the, and can streamline and simplify the manufacturing process.

As described above, the optical member for a display device according to the present invention can perform a composite function in one optical member, which is efficient, and the manufacturing cost can be reduced.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

Claims (15)

i) a substrate made of a transparent resin material; And ii) an optical member formed on one surface of the substrate and including an optical pattern including a plurality of unit patterns each having an external light shielding part including a light absorbing material and an electromagnetic shielding part including a conductive material. The method of claim 1, The cross section of the unit pattern is wedge-shaped, trapezoidal, U-shaped or semi-circular, the optical member for a display device. The method of claim 1, The external light shielding portion is formed above the unit pattern, and the electromagnetic shielding portion is formed below the unit pattern. The method of claim 1, And the electromagnetic shielding portion is formed above the unit pattern, and the external light shielding portion is formed below the unit pattern. The method of claim 1, And the light absorbing material comprises carbon black. The method of claim 1, The conductive material may be polythiophene, polypyrrole, polyaniline, poly (3,4-ethylenedioxythiophene), poly (3-alkylthiophene), polyisothianaphthene, poly (p-phenylenevinylene), poly Optical member for a display device, characterized in that at least one polymer material selected from the group consisting of (p-phenylene) and derivatives thereof. The method of claim 1, The conductive material is at least one material selected from the group consisting of carbon nanotubes, metal powders and metal oxide powders. The method of claim 7, wherein The metal powder includes at least one metal selected from the group consisting of cobalt, aluminum, zinc, zirconium, platinum, gold, palladium, titanium, iron, tin, indium, nickel, molybdenum, tungsten, silver and copper. An optical member for display device. The method of claim 7, wherein The metal oxide is at least one material selected from the group consisting of copper oxide, zinc oxide, indium oxide, tin oxide, indium tin oxide, aluminum zinc oxide and indium zinc oxide. The method of claim 1, The conductive material is an optical member for a display device, characterized in that the metal particles having an average particle diameter of 15㎛ or less. The method according to any one of claims 1, 3 or 4, The external light shielding part includes a light absorbing material and a conductive material in a volume ratio of 9: 1 to 7: 3. The method according to any one of claims 1, 3 or 4, The electromagnetic shielding part includes a light absorbing material and a conductive material in a volume ratio of 1: 9 to 3: 7. In the filter for a display device formed by stacking a plurality of functional members, The functional member of any one of the functional members, i) a substrate made of a transparent resin material; And ii) an optical pattern formed on one surface of the substrate, the optical pattern including a plurality of unit patterns each having an external light shielding part including a light absorbing material and an electromagnetic shielding part including a conductive material Filter for display device comprising a. The method of claim 13, At least one functional member of the functional members comprises at least one pigment that selectively absorbs light. Transparent substrates; An electromagnetic shielding layer formed on one surface of the substrate and including a conductive film in which a metal thin film and a metal oxide thin film are laminated one to three times; Is formed on the electromagnetic shielding layer, i) a substrate made of a transparent resin material; And ii) an optical member formed on one surface of the substrate and including an optical pattern including a plurality of unit patterns each having an external light shielding part including a light absorbing material and an electromagnetic shielding part including a conductive material; A color correction layer formed on the optical member and containing a dye that absorbs light of a specific wavelength band; And And an anti-reflection layer formed on the other surface of the substrate.

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