KR100774959B1 - Plasma Display Equipment - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display device. More particularly, the transparent electrode of a plasma display panel, which has been conventionally formed of indium tin oxide, is formed of a silver / indium tin oxide multilayer thin film, thereby simplifying a manufacturing process and improving filter design freedom. In addition, the present invention relates to a plasma display device capable of improving operation efficiency and driving characteristics by lowering driving resistance of a transparent electrode. As described above, the present invention provides a plasma display device including a front panel formed by pairing a scan electrode and a sustain electrode, wherein the transparent electrode constituting the scan electrode or the sustain electrode includes a near-infrared shielding material.

Plasma display, filter, transparent electrode

Description

Plasma Display Equipment {Plasma Display Equipment}

1 is a view showing the structure of a plasma display device in which a conventional glass filter is formed.

2 is a diagram illustrating a structure of a plasma display device in which a conventional film filter is formed.

3 is a diagram illustrating a structure of a plasma display panel provided in a conventional plasma display device.

4 illustrates a structure of a plasma display panel provided in the plasma display device according to the present invention.

5 is a diagram illustrating a structure of a plasma display device having a glass filter according to the present invention.

6 illustrates a structure of a plasma display device having a film filter according to the present invention.

***** Explanation of symbols for the main parts of the drawing *****

220: plasma display panel 221: front panel

221a: front glass 221b: scan electrode

221c: sustain electrode 221d: upper dielectric layer

221e: protective layer 222: rear panel

222a: rear glass 222b: bulkhead

222c: address electrode 222d: phosphor

222e: lower dielectric layer

a: transparent electrode b: bus electrode

The present invention relates to a plasma display device, and more particularly, by forming a transparent electrode of a plasma display panel (hereinafter referred to as PDP), which is conventionally formed of indium tin oxide, by using a silver / indium tin oxide multilayer thin film. The present invention relates to a plasma display device which simplifies the manufacturing process, increases the degree of freedom in designing a filter, and at the same time lowers the driving resistance of the transparent electrode, thereby improving operation efficiency and driving characteristics.

In general, a plasma display device has a partition wall formed between a front panel and a rear panel made of soda-lime glass, forming one unit cell, and in each cell, helium-xenon (He-Xe) and helium-neon. An inert gas such as (He-Ne) is discharged by a high frequency voltage, and vacuum ultraviolet rays (Vacuum Ultraviolet rays) are generated during discharge to emit an phosphor formed between partition walls, thereby realizing an image.

In general, since a plasma display device implements an image by applying high voltage and high frequency for plasma discharge, more electromagnetic waves are formed in front of a PDP than a cathode ray tube (hereinafter referred to as a CRT) or a liquid crystal display panel (hereinafter referred to as an LCD). Emits. In addition, the plasma display device emits near infrared rays (NIR) derived from inert gases such as neon (Ne) and xenon (Xe), which are very close to the wavelength of the remote controller used in home appliances. It may cause malfunction. In addition, as in the CRT or LCD, there are various problems such as user's glare caused by external light, contrast deterioration, which is an image quality characteristic of other display devices.

Therefore, in the conventional plasma display device, it is common to form a filter having a predetermined function on the front surface of the PDP in order to shield electromagnetic waves or near infrared rays emitted to the outside, and such a filter is a glass filter according to its structure. And film filter.

1 illustrates a structure of a plasma display device in which a conventional glass filter is formed. As shown in the drawing, a plasma display device having a conventional glass filter includes a case 110 including a front cabinet 111 and a metal back cover 112 that determine an external appearance, and an inside of the case 110 by gas discharge. A plasma display device connected to the PDP 120 for realizing an image by exciting the phosphors with vacuum ultraviolet rays generated in the light emitting diode, a driving circuit board 130 for driving and controlling the PDP 120, and a driving circuit board 130. A heat sink 140 for dissipating heat generated during operation, a glass filter 150a formed at a predetermined interval on the front surface of the PDP 120, and a finger spring gasket for supporting the glass filter 150a ( 160, Finger Spring Gasket) and the filter support (170, Filter Supporter), it is composed of a module supporter (180, 180) for supporting the filter support 170 and electrically connected to the metal bag cover (112).

The glass filter 150a may include a first functional film formed on the transparent glass substrate 151 formed at a predetermined distance from the PDP 120, that is, an antireflection film layer 152 (AR Flim) and the transparent glass substrate 151. A second functional film for controlling color while simultaneously shielding near infrared rays, that is, a color die film layer 153 and a third functional film layer for shielding electromagnetic waves, that is, an electromagnetic shielding film layer ( 154, EMI Flim) is formed sequentially. In particular, the transparent glass substrate 151 serves as a base for forming a filter and also serves to protect the PDP 120 from external shock. Thus, the transparent glass substrate 151 is included in the plasma display device. The filter is called a glass filter.

2 illustrates a structure of a plasma display device having a conventional film filter. As shown in the drawing, in the plasma display device in which the film filter is formed, the film filter 150b is formed by stacking a plurality of functional films, and is directly attached to the front substrate 121 of the PDP 120 by laminating or the like. The film filter 150b includes an electromagnetic wave shielding film layer 154, a color die film layer 153, and an antireflection film layer 152 like the conventional glass filter 150a.

3 illustrates a structure of a plasma display panel provided in a conventional plasma display device. As illustrated, the PDP 120 includes a front panel 121 in which a plurality of sustain electrode pairs formed by pairing a scan electrode 121b and a sustain electrode 121c are arranged on a front glass 121a, which is a display surface on which an image is displayed. ) And a rear panel 122 having a plurality of address electrodes 122c arranged so as to intersect with the plurality of sustain electrode pairs formed on the rear glass 122a forming the rear surface of the rear glass 122a.

The front panel 121 includes a pair of scan electrodes 121b and a sustain electrode 121c for mutually discharging in one discharge cell and maintaining light emission of the cells, and includes a scan electrode 121b and a sustain electrode 121c. A transparent electrode (a) formed of indium tin oxide (ITO), which is a transparent conductive material, and a bus electrode (b) made of a metal material. The scan electrode 121b and the sustain electrode 121c are covered by one or more upper dielectric layers 121d that limit the discharge current and insulate the electrode pairs, and facilitate discharge conditions on the upper surface of the upper dielectric layer 121d. For this purpose, a protective layer 121e on which magnesium oxide (MgO) is deposited is formed. The rear panel 122 is arranged in such a manner that a plurality of discharge spaces, that is, stripe 122b of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 122c for performing address discharge to generate vacuum outer lines are arranged parallel to the partition wall 112b. On the upper side of the rear panel 122, R, G, and B phosphors 122d for emitting visible light for image display during address discharge are coated. A lower dielectric layer 122e is formed between the address electrode 122c and the phosphor 122d to protect the address electrode 122c.

As described with reference to FIGS. 1 to 3, the conventional plasma display device includes a transparent electrode (a) formed of indium tin oxide, which is a transparent conductive material, on the front panel 121, and a bus electrode (b) made of a metal material. A filter (glass filter 150a or film filter) having a PDP 120 structure formed so that the scan electrodes 121b and the sustain electrodes 121c, which are respectively constituted in pairs, is included in the color die film layer 153. (150b)] has a structure.

As such, in the related art, since the PDP 120 does not shield the near infrared rays generated by using xenon (Xe) or the like as the discharge gas by itself, the color die film layer 153 having a function of shielding the near infrared rays to the filter is provided. It should be provided separately. In addition, the color die film layer 153 used for shielding near infrared rays is a silver / indium tin oxide multilayer thin film laminated with 5 to 9 layers according to the near infrared shielding rate using silver (Ag) and indium tin oxide as shielding materials. It is common to use (Ag / ITO multi-layer), so that the transparent electrode a of the PDP 120 and the color die film layer 153 of the filter all contain the same material, indium tin oxide, resulting in As a result, difficulties in the manufacturing process in which two layers containing the same material of indium tin oxide are formed separately occur, resulting in an increase in cost.

In addition, in the related art, the front panel 121 of the PDP 120 includes a transparent electrode a made of indium tin oxide having a high resistivity, and together with the bus electrode b made of metal, a scan electrode 121b and a sustain electrode. Since it was used as (121c), the sheet resistance had a relatively high value of about 3 kW / square, and there was a problem in that efficiency decreased due to heat generation.

Therefore, in order to solve the above problems, the transparent electrode of the PDP, which was formed of conventional indium tin oxide, was formed of a silver / indium tin oxide multilayer thin film, and thus manufactured of a conventional silver / indium tin oxide multilayer thin film to produce near infrared rays. By eliminating the need to form additional color die film layers of the shielded filter, the present invention provides a plasma display device that simplifies the manufacturing process, increases the degree of freedom in filter design, and reduces the cost by reducing two materials to one material. There is a purpose.

In addition, the present invention can improve the operation efficiency and driving characteristics by lowering the driving resistance of the transparent electrode while maintaining the transmittance by replacing the transparent electrode of the PDP, which was conventionally formed of indium tin oxide with a silver / indium tin oxide multilayer thin film It is an object of the present invention to provide a plasma display device.

According to an aspect of the present invention, there is provided a plasma display device including a front panel formed by pairing a scan electrode and a sustain electrode, wherein the transparent electrode constituting the scan electrode or the sustain electrode includes a near-infrared shielding material. Characterized in that.

It is preferable that the transparent electrode of this invention consists of silver and indium tin oxide.

The transparent electrode of the present invention is preferably formed of a silver / indium tin oxide multilayer thin film.

In this invention, it is preferable that the sheet resistance of the said transparent electrode is 1.2 kPa / square or more and 2.4 kPa / square or less.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

4 illustrates a structure of a plasma display panel provided in the plasma display device according to the present invention. As illustrated, the PDP 220 (refer to FIGS. 5 and 6) of the plasma display device according to the present invention has a scan electrode 221b and a sustain electrode 221c on the front glass 221a which is a display surface on which an image is displayed. ) Is a rear panel in which a plurality of address electrodes 222c are arranged so as to intersect the aforementioned plurality of storage electrode pairs on the front panel 221 and the rear glass 222a forming a rear surface of the plurality of storage electrode pairs formed in pairs. Panels 222 are coupled in parallel with a distance therebetween.

The front panel 221 includes a pair of scan electrodes 221b and sustain electrodes 221c for mutual discharge in one discharge cell and to maintain light emission of the cells, and includes a scan electrode 221b and a sustain electrode 221c. It consists of a transparent electrode (a) and the bus electrode (b) made of the metal material. The transparent electrode a and the bus electrode b are disposed in a direction orthogonal to the address electrode 222c.

The transparent electrode (a) of the present invention is formed to be made of silver and indium tin oxide, unlike conventionally formed with only indium tin oxide, and more preferably, silver / indium tin oxide multilayer thin film is manufactured in a multilayer thin film form. To be formed. When the discharge voltage is supplied to both ends of the transparent electrode a, mutual surface discharge occurs in the corresponding discharge space, and the bus electrode b has a width of about 50 to 100 μm as a metal material on the upper portion of the transparent electrode a. ) To prevent the voltage drop caused by the resistance of the transparent electrode a. By constructing the transparent electrode (a) with a silver / indium tin oxide multilayer thin film, the transparent electrode (a) can perform a near infrared shielding function by itself, eliminating the need to construct a separate layer for near infrared shielding in the filter. You lose. In addition, the transparent electrode (a) of the present invention replaces indium tin oxide with a silver / indium tin oxide multilayer thin film, and thus has a very low resistance value of about 1.2 to 2.4 mA / □, thereby improving operation efficiency and driving characteristics. It can be improved, and manufactured in a very thin film form, it can maintain a transmittance of 90% or more similar to indium tin oxide.

The scan electrode 221b and the sustain electrode 221c are covered by one or more upper dielectric layers 221d to limit the discharge current and insulate the electrode pairs, and to facilitate the discharge conditions on the upper surface of the upper dielectric layer 221d. For this purpose, a protective layer 221e on which magnesium oxide (MgO) is deposited is formed. The rear panel 222 is arranged such that a plurality of discharge spaces, that is, barrier ribs 222b of a stripe type (or well type) for forming discharge cells are arranged in parallel. In addition, a plurality of address electrodes 222c which perform address discharge to generate vacuum outer lines are arranged in parallel with the partition wall 222b. On the upper side of the rear panel 222, R, G, and B phosphors 222d which emit visible light for image display during address discharge are coated. A lower dielectric layer 222e is formed between the address electrode 222c and the phosphor 222d to protect the address electrode 222c.

5 shows the structure of a plasma display device having a glass filter according to the present invention. As shown, the plasma display device having the glass filter according to the present invention includes a case 210 including a front cabinet 211 and a metal back cover 212 for determining the appearance and a case (eg, a gas discharge). 210 is connected to a PDP 220 for realizing an image by exciting a phosphor with vacuum ultraviolet rays generated inside, a driving circuit board 230 for driving and controlling the PDP 220, and a driving circuit board 230. A heat sink 240 for dissipating heat generated when the plasma display device is driven, a glass filter 250a formed at a predetermined interval on the front surface of the PDP 220, and a finger for supporting the glass filter 250a. Finger spring gasket (260) and filter support (270, Filter Supporter), and the module supporter (280, Module Supporter) for supporting the filter support 270 and electrically connected to the metal bag cover 212 .

The glass filter 250a may include a first functional film formed on the transparent glass substrate 251 formed at a predetermined distance from the PDP 220, that is, the antireflective film layer 252 (AR Flim) and the transparent glass substrate 251. The second functional film layer, that is, the electromagnetic shielding film layer 253 (EMI Flim), which shields the electromagnetic waves adjacent to the substrate is sequentially formed. The transparent glass substrate 251 serves to form a filter and to protect the PDP 220 from an external impact.

In the present invention, the transparent electrode (a) is composed of a silver / indium tin oxide multilayer thin film used as a near-infrared shield, and the PDP 220 performs the near-infrared shielding function by itself, so that the near-infrared shielding in the glass filter 250a is performed. This eliminates the need to configure separate layers for the process, which simplifies the manufacturing process and reduces costs.

6 illustrates a structure of a plasma display device having a film filter according to the present invention. As shown, the film filter 250b is formed by stacking a plurality of functional films in the plasma display device having the film filter according to the present invention, and is directly attached to the front substrate 221 of the PDP 220 by laminating or the like. .

The film filter 250b of the present invention includes an electromagnetic wave shielding film layer 252 and an antireflection film layer 253 similarly to the glass filter 250a, and includes a transparent electrode (a) composed of a silver / indium tin oxide multilayer thin film. Since the PDP 220 performs a near infrared shield function by itself, there is no need to configure a separate layer for near infrared shielding in the film filter 250b.

As such, the present invention eliminates the need to provide a separate layer for near-infrared shielding in the filter by forming a silver / indium tin oxide multilayer thin film used as a near-infrared shielding material as a transparent electrode (a), and thus, the transparent electrode (a). By lowering the driving resistance of the operation efficiency and driving characteristics can be improved.

As described above, the plasma display device according to the present invention forms a transparent electrode of a PDP, which is conventionally formed of indium tin oxide, into a silver / indium tin oxide multilayer thin film, and is manufactured of a conventional silver / indium tin oxide multilayer thin film to shield near infrared rays. By eliminating the need to additionally form the color die film layer of the filter, it is possible to simplify the manufacturing process, increase the filter design freedom, and reduce the cost by reducing two materials to one material.

In addition, the plasma display device according to the present invention replaces the transparent electrode of the PDP, which is conventionally formed of indium tin oxide, with a silver / indium tin oxide multilayer thin film, thereby lowering the driving resistance of the transparent electrode while maintaining transmittance, thereby operating efficiency and driving. There is an effect that can improve the characteristics.

Claims (4)

A plasma display device comprising a front panel formed such that a scan electrode and a sustain electrode are paired with each other. And the transparent electrode constituting the scan electrode or the sustain electrode comprises a near-infrared shielding material. The method of claim 1, And the transparent electrode is made of silver and indium tin oxide. The method of claim 1, And the transparent electrode is formed of a silver / indium tin oxide multilayer thin film. The method according to any one of claims 1 to 3, And sheet resistance of the transparent electrode is 1.2 kW / square or more and 2.4 kW / square or less.

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