KR100708705B1 - Film type filter and plasma display apparatus comprising the same - Google Patents

Abstract

The present invention provides a film-type filter having a base film and an antiglare layer disposed on one side of the base film, and a plasma display device having the same, in order to reduce the problem and weight of the dual image.

Description

Film filter and plasma display device having the same {Film type filter and plasma display apparatus comprising the same}

1 is a perspective view of a film filter according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

3 is a cross-sectional view showing a modification of the film filter shown in FIG. 2.

4 is an exploded perspective view of the plasma display device.

FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4.

<Brief description of symbols for the main parts of the drawings>

1: antiglare layer 3: base film

4 hard coating layer 5 electromagnetic wave shielding layer

6: adhesion layer 10: film filter

100: plasma display device

The present invention relates to a film filter and a plasma display device having the film filter.

Plasma display device using plasma display panel is a flat panel display device that displays images by using gas discharge phenomenon. It is excellent in various displays such as brightness, contrast, afterimage, and viewing angle, and it is possible to display thin and large screens. It is attracting attention as a display device.

However, in the conventional plasma display apparatus, there is a problem in that an image is repeatedly reflected by a refractive phenomenon due to a difference in material between the front substrate of the plasma display panel and the tempered glass filter. In addition, since the tempered glass filter maintains a certain thickness (about 3 mm) to withstand external shocks, there is a problem in that weight and cost increase. In addition, the existing tempered glass filter has a very complicated structure consisting of a complex of films to perform a variety of functions, there was a problem that the manufacturing process is cumbersome and expensive.

In order to solve the above problems, it is an object of the present invention to provide a plasma filter having the film filter and the film filter is reduced, the weight of the dual image is reduced.

In addition, another object of the present invention is to provide a film filter having a reduced manufacturing cost and easy to manufacture, and a plasma display device including the film filter.

Another object of the present invention is to provide a film filter having a reduced glare and improved anti-glare and a plasma display device having the film filter.

In order to achieve the above objects and other objects, the present invention provides a film filter having a base film and an antiglare layer disposed on one side of the base film.

According to another aspect of the present invention, the present invention provides a film-type filter comprising a plasma display panel for implementing an image, and a base film and an antiglare layer disposed on the base film and disposed on the front surface of the plasma display panel. It provides a plasma display device comprising.

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a perspective view of a film filter 10 according to an embodiment of the present invention, Figure 2 is a cross-sectional view taken along the line II-II of FIG.

1 and 2, the film filter 10 includes a base film 3, an antiglare layer 1, an electromagnetic wave shielding layer 5, and an adhesive layer 6.

The base film 1 is generally preferably formed using a material having a high visible light transmittance, but may be colored for improving clear room contrast and the like. The base film 3 is polyethersulphone (PES), polyacrylate (PAR, polyacrylate), polyetherimide (PEI, polyetherimide), polyethylene naphthalate (PEN, polyethyelenen napthalate), polyethylene terephthalate (PET) , polyethyeleneterepthalate, polyphenylene sulfide (PPS), polyallylate, polyimide, polycarbonate (PC), cellulose triacetate (TAC), cellulose acetate propinonate : CAP) and the like, and preferably, polycarbonate, polyethylene terephthalate, cellulose tri acetate, polyethylene naphthalate is used.

In addition, the base film 3 has a flat plate shape, the thickness is preferably 50um to 500um. However, as the thickness of the base film 3 decreases, the effect of preventing scattering during panel breakage is reduced, and the efficiency of the laminating process decreases as the thickness of the base film 3 decreases, which has a thickness of 80 μm to 400 μm. More preferred.

The antiglare layer 1 is disposed on the base film 3. The antiglare layer 3 serves to scatter external incident light from the surface and to prevent the surrounding environment of the film filter from shining on the surface of the film filter. When the antiglare layer is formed on the conventional tempered glass filter, there is a disadvantage in that the sharpness of the image is much lowered between the front substrate and the tempered glass filter. Therefore, the antiglare layer can be applied to the conventional tempered glass filter. There was no. However, in the present invention, since the film filter is directly attached to the display panel, the problem of the sharpness of the image hardly occurs, and thus the antiglare layer 1 can be applied.

The antiglare layer 1 may be formed by forming fine unevenness on the base film 3. Looking at it in detail as follows. Recently, the demand for high-definition angle, high-speed response and high definition of plasma display, that is, high image quality, is very high. This high definition is realized by miniaturization of the pixel size. However, when the pixel size becomes smaller, for example, when the resolution becomes higher than 133 ppi (133 Pixels / inch), the luminance difference occurs in the light reaching the eyes of the user. Flashing discomfort occurs in the eyes of the user. This phenomenon is caused by the presence of irregularities larger than the pixels displaying images on the surface of the base film, so that transmitted light from a single pixel is collected by a lens effect, or red, green, or blue transmitted light from adjacent sub-pixels. It is caused by mixing. Therefore, it is preferable that the minute unevenness of the antiglare layer is smaller than the pixels displaying the image.

The antiglare layer 1 may be formed using a dip coating method, an air knife method, a curtain coating method, a roller coating method, a wire bar coating method, a gravure coating method, or the like.

The antiglare layer 1 preferably includes a hard coating material therein. Since the display device to which the film filter is applied may receive various types of external force during use, there is a risk that scratches are generated by the external force. Therefore, by including a hard coating material inside the antiglare layer 1, scratching by external force is prevented. However, in the present embodiment, a hard coating material is included in the antiglare layer 1, but as shown in FIG. 3, a separate hard coat layer 4 is provided on the antiglare layer 1 ′. It may be formed.

Preferably, the hard coating material includes a polymer as a binder, and an acrylic, urethane, epoxy, and siloxane polymer may be used, or an ultraviolet curable resin such as an oligomer may be used. This may further include a silica-based filler in order to improve the strength (hardness).

In addition, the antiglare layer 1 preferably has a thickness of 2 to 7 μm and a pencil hardness of 2 to 3H, but the present invention is not limited thereto.

The electromagnetic shielding layer 5 is disposed on the other surface of the base film 3. The electromagnetic wave shielding layer 5 shields electromagnetic waves harmful to a human body generated in the display device. The electromagnetic wave shielding layer 5 is formed by stacking one or more metal layers or metal oxide layers, and preferably has a multi-layer structure of 5 to 11 layers. In particular, when the metal oxide layer and the metal layer are laminated together, the metal oxide layer has an advantage of preventing oxidation or deterioration of the metal layer. In addition, when the electromagnetic wave shielding layer 5 is laminated in multiple layers, the surface resistance value of the electromagnetic wave shielding layer 5 can be corrected as well as the visible light transmittance can be adjusted.

The metal layer may be palladium, copper, platinum, rhodium, aluminum, iron, cobalt, nickel, zinc, ruthenium, tin, tungsten, or iridium. (Iridium), lead, silver (Ag) and the like can be formed using each or in combination.

As the metal oxide layer, tin oxide, indium oxide, antimony oxide, zinc oxide, zirconium oxide, titanium oxide, magnesium oxide, silicon oxide, aluminum oxide, metal alkoxide, indium tin oxide, ATO and the like can be used.

The electromagnetic wave shielding layer 5 may be formed using sputtering, vacuum deposition, ion plating, CVD, PVD, or the like. However, in the present embodiment, it is preferable that the above-mentioned low-wave shield layer 5 is formed in a multi-layer structure of 5 to 11 layers by ITO and Ag alone or in an alternate deposition structure.

The metal layer or the metal oxide layer has a function of shielding near infrared rays as well as an electromagnetic wave shielding function. Therefore, the problem that the malfunction of peripheral electronic devices occurs due to near infrared rays is reduced.

The adhesion layer 6 is formed on the electromagnetic wave shielding layer 5. The adhesive layer 6 is used to attach a film filter to a display panel. In order to reduce the dual image phenomenon, the pressure-sensitive adhesive layer 6 is preferably such that the difference in refractive index between the pressure-sensitive adhesive layer 6 and the display panel does not exceed a predetermined value, for example, 1%.

The adhesive layer 6 preferably includes a thermoplastic and UV curable resin. For example, the acrylate resin may be a pressure sensitive adhesive (PSA) or the like. The adhesive layer may be formed using a dip coating method, an air knife method, a curtain nose method, a roller coating burr, a wire bar coating method, a gravure coating method, or the like.

The adhesive layer 6 may further include a compound that absorbs near infrared rays. Such compounds include resins containing copper atoms, resins containing copper compounds or phosphorus compounds, resins containing copper compounds or THIO urea derivatives, resins containing tungsten compounds, cyanine compounds, and the like. Can be.

In addition, the adhesive layer 6 may further include a dye such as a dye or a pigment to block the neon light to perform color correction. The dye performs a function of selectively absorbing light of a wavelength of 400 ~ 700 nm which is a visible light region. In particular, when the plasma display panel is discharged, unnecessary visible light is generated at about 585 nm wavelength by neon, which is a discharge gas. In order to absorb the visible light, cyanine-based, squary-based, and azomethine-based systems are used. Compounds such as xanthene, oxo, and azo may be used. The pigment is used as the fine particles to be included in the adhesive layer 6 in the form of a dispersion.

In the case of the film filter 10 having the above structure, the transmittance may have 30 to 90%, preferably 40 to 80%. In addition, the film filter 10 may have a haze of 3 to 11%.

4 and 5 illustrate a plasma display device 100 having a film filter according to an embodiment of the present invention. 4 is an exploded perspective view of the plasma display apparatus 100, and FIG. 5 is a cross-sectional view taken along the line VV of FIG. 4. The same reference numerals are used for the same members as those described in the above-described embodiments in the following description of the plasma display apparatus 100.

The plasma display apparatus 100 includes a film filter 10, a plasma display panel 50, a chassis 30, a heat conductive member 53, and a circuit unit 40.

The plasma display panel 50 implements an image by gas discharge, and includes a front panel 51 and a rear panel 52 that are coupled to each other.

The film filter 10 is attached to the front surface of the plasma display panel 50 by the adhesive layer 6. Electromagnetic waves of the plasma display panel 50 are blocked by the film filter 10, and a glare phenomenon is reduced. In addition, infrared rays or neon lights may be blocked. In addition to this, since the film filter 10 is substantially directly attached to the front surface of the plasma display panel 50, the problem of dual imaging is fundamentally solved.

The chassis 30 is disposed behind the plasma display panel 50 to structurally support the plasma display panel 50. The chassis 30 is preferably made of aluminum, iron, or the like, which is a metal material having excellent rigidity, or made of plastic.

The thermally conductive member 53 is disposed between the plasma display panel 50 and the chassis 30. In addition, a plurality of double-sided tapes 54 are disposed along the circumference of the heat conductive member 53, and the double-sided tapes 54 serve to fix the plasma display panel 50 and the chassis 30 to each other.

In addition, a circuit unit 40 is disposed behind the chassis 30, and a circuit for driving the plasma display panel 50 is wired. The circuit unit 40 transmits an electrical signal to the plasma display panel 50 by signal transmission means. As a signal transmission means, a flexible printed cable (FPC), a tape carrier package (TCP), a chip on film (COF), or the like may be selected and used. According to the present embodiment, FPCs 61 are disposed on the left and right sides of the chassis 30 as signal transmission means, and TCPs 62 are disposed on the upper and lower sides of the chassis 30 as signal transmission means.

The film filter and the plasma display device having the same according to the present invention have the following effects.

First, since the film filter is attached directly to the front of the display panel, the dual image can be reduced.

Second, since the thickness is formed using a relatively thin base film, the weight is reduced, the cost is reduced. In addition, the transmittance is improved.

Third, since the layers having various functions can be laminated on the base film, manufacturing becomes easy.

Fourth, anti-glare effect is improved due to the diffuse reflection effect of the anti-glare layer, and specular reflection is reduced to improve visibility.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

Claims (18)

Base film; An antiglare layer disposed on one side of the base film; And And an electromagnetic wave shielding layer disposed on the other side of the base film. The method of claim 1, The antiglare layer comprises a hard coating material therein to prevent scratches from the outside. The method of claim 2, The pencil hardness of the antiglare layer is 2 to 3H, the film filter, characterized in that the thickness is 2 to 7㎛. The method of claim 1, And a hard coating layer disposed on the antiglare layer. delete The method of claim 1, The electromagnetic wave shielding layer includes at least one metal layer or a metal oxide layer. The method of claim 6, The electromagnetic wave shielding layer includes at least one of Ag, ITO, Cu, Au, Al. The method of claim 1, And a pressure-sensitive adhesive layer disposed on the other side of the base film. The method of claim 8, The adhesive layer is a film filter, characterized in that it comprises a pigment or dye to color correction. A plasma display panel for implementing an image; And A film filter attached to a front surface of the plasma display panel, the film filter including a base film, an antiglare layer disposed on one side of the base film, and an electromagnetic shielding layer disposed on the other side of the base film; Display device. The method of claim 10, The antiglare layer includes a hard coating material therein to prevent scratches from the outside. The method of claim 11, Pencil hardness of the anti-glare layer is 2 to 3H, the thickness of the plasma display device, characterized in that 2 to 7㎛. The method of claim 10, And a hard coating layer disposed on the antiglare layer. delete The method of claim 10, The electromagnetic wave shielding layer includes at least one metal layer or a metal oxide layer. The method of claim 15, The electromagnetic wave shielding layer includes at least one of Ag, ITO, Cu, Au, Al. The method of claim 10, And a pressure-sensitive adhesive layer disposed on the other side of the base film. The method of claim 17, The adhesive layer includes a pigment or a dye to color correction.

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