KR20070090450A - Plasma display panel and manufacturing method there of - Google Patents

Abstract

A plasma display panel and a method for manufacturing the same are provided to display high quality images and to enhance transmittance of visible rays by improving a characteristic of a protective layer. A plasma display panel includes a front panel(300) and a rear panel(310). The front panel includes a front substrate(301). The rear panel includes a rear substrate(311), a data electrode(313) formed on the rear substrate, scan and sustain electrodes(316,317) crossing the data electrode, a dielectric layer(315) for covering the data electrode, and a barrier rib(312) formed on the dielectric layer. The scan electrode and the sustain electrode are formed on an upper part of the barrier rib. The rear panel further includes a black layer between the barrier rib, the scan electrode, and the sustain electrode.

Description

Plasma Display Panel and Manufacturing Method thereof

1 illustrates a structure of a general plasma display panel.

2 is a diagram sequentially illustrating a method of manufacturing a conventional plasma display panel.

3 is a view showing an example of the structure of a plasma display panel of the present invention.

4 is a diagram sequentially illustrating a method of manufacturing a plasma display panel of the present invention.

5 is a view showing another example of the structure of the plasma display panel of the present invention.

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

300: front panel 301: front substrate

302: protective layer 310: rear panel

311 rear substrate 312 partition wall

313 data electrode (X) 314 phosphor

315: Lower dielectric layer 316: Scan electrode Y

317: sustain electrode (Z)

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel having an improved electrode structure and a manufacturing method thereof.

In general, a plasma display panel is a partition wall formed between a front panel and a rear panel to form a unit discharge cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He). An inert gas containing a main discharge gas such as and a small amount of xenon is filled. A plurality of unit discharge cells described above are gathered to form one pixel. For example, a red (R) cell, a green (G) cell, and a blue (B) cell may form one pixel. When a high frequency voltage is applied to such a unit discharge cell to discharge, an inert gas generates vacuum ultra violet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 illustrates a structure of a general plasma display panel.

As illustrated in FIG. 1, a plasma display panel includes a front panel in which a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 are arranged on a front substrate 101 that is a display surface on which an image is displayed. 100 and the rear panel 110 on which the plurality of address electrodes 113 are arranged so as to intersect the plurality of storage electrode pairs described above on the rear substrate 111 forming the rear surface are coupled in parallel with a predetermined distance therebetween.

The front panel 100 is made of a scan electrode 102 and a sustain electrode 103, that is, a transparent electrode (a) formed of a transparent ITO material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the bus electrode b are included in pairs. The scan electrode 102 and the sustain electrode 103 are covered by one or more upper dielectric layers 104 that limit the discharge current and insulate the electrode pairs, and facilitate discharge conditions on top of the upper dielectric layer 104. In order to do this, a protective layer 105 on which magnesium oxide (MgO) is deposited is formed.

The rear panel 110 is arranged in such a manner that a plurality of discharge spaces, that is, barrier ribs 112 of a stripe type (or well type) for forming discharge cells are maintained in parallel. In addition, a plurality of address electrodes 113 are arranged in parallel with the partition wall 112 to perform address discharge so that the inert gas in the discharge cell generates vacuum ultraviolet rays. On the upper side of the rear panel 110, red (R), green (G), and blue (B) phosphors 114 which emit visible light for image display during sustain discharge are coated. A lower dielectric layer 115 is formed between the address electrode 113 and the phosphor 114 to protect the address electrode 113.

The front panel and the rear panel described above are joined through a sealing process to form a plasma display panel. Looking at the manufacturing method of such a plasma display panel in detail as shown in FIG.

2 is a diagram sequentially illustrating a method of manufacturing a conventional plasma display panel.

First, a manufacturing method of the front panel shown in the left side of FIG.

A transparent electrode layer 106 formed of a transparent ITO material is formed on the front substrate 101. On the transparent electrode layer 106, an electrode material 107 made of metal for forming the bus electrode b is applied.

Thereafter, a scan electrode 102 made of the transparent electrode 102a and the bus electrode 102b and a sustain electrode 103 made of the transparent electrode 103a and the bus electrode 103b are formed through the exposure / development process.

A dielectric layer 104 is formed to cover the electrodes, and finally, a protective layer (MgO, 105) is formed on the dielectric layer 104 to complete the front panel.

Next, looking at the manufacturing method of the rear panel shown in the right side of Figure 2, for example, is formed by the following process.

The electrode material 116 is coated on the back substrate 111. Thereafter, the data electrode 113 is formed through an exposure / development process.

The dielectric layer 115 is formed to cover the data electrode 113, and the partition 117 is coated on the dielectric layer 115. Thereafter, the partition wall 112 is formed through an exposure / development process.

Finally, the phosphor 114 is coated on the discharge space partitioned by the partition wall 112 to complete the rear panel.

The completed front panel and the rear panel are bonded at a predetermined distance to complete the plasma display panel.

In the structure of the plasma display panel, there is a problem in that the manufacturing cost increases. For example, there is a problem in that a material layer and an additional process cost increase due to the formation of a dielectric layer on both the front panel and the rear panel.

In addition, due to the chemical reaction between the electrode material and the dielectric layer has a bad effect such as yellowing phenomenon, there is a problem that deteriorates the color temperature characteristics and transmittance characteristics of the plasma display panel.

Moreover, many manufacturing process steps result in reduced smoothness in thin film processes such as protective layers. Accordingly, there is a problem that the crystallinity and electrical characteristics of the protective layer is deteriorated. Not only this, there is also a problem in that the production yield decreases due to an increase in the manufacturing process time.

SUMMARY OF THE INVENTION In order to solve such a problem, an object of the present invention is to provide a plasma display panel and a method of manufacturing the same, which can simplify the manufacturing process and improve manufacturing cost and production yield.

Further, another object of the present invention is to provide a plasma display panel and a method of manufacturing the same that can improve the film characteristics of the protective layer.

In addition, another object of the present invention is to provide a plasma display panel and a method of manufacturing the same that can improve the visible light transmittance.

Another object of the present invention is to provide a plasma display panel and a method of manufacturing the same that can improve luminance characteristics.

The technical problem of the present invention is not limited to the above-mentioned thing, and another technical problem to be achieved by the present invention will be clearly understood by those skilled in the art by the effect of the configuration of the present invention.

According to an embodiment of the present invention, a plasma display panel includes a front panel including a front substrate and a data electrode formed on a rear substrate, and a scan electrode and a sustain electrode formed to intersect the data electrode. It includes a rear panel that includes.

The rear panel may further include a dielectric layer formed to cover the data electrode and a partition wall formed on the dielectric layer, wherein the scan electrode and the sustain electrode are formed on the partition wall.

The rear panel may further include a black layer formed between the barrier rib, the scan electrode, and the sustain electrode.

The black layer has a thickness of about 1 μm or more and 4 μm or less.

The front panel may further include a protective layer formed on the front substrate.

The scan electrode and the sustain electrode have a thickness of about 5 μm or more and 25 μm or less.

The rear panel may further include a phosphor coated on the discharge space partitioned by the partition wall, wherein a coverage of the phosphor is less than or equal to a boundary between the partition wall, the scan electrode, and the sustain electrode.

The scan electrode and the sustain electrode protrude toward the discharge space.

A method of manufacturing a plasma display panel according to the present invention for achieving the above object includes forming a data electrode on a back substrate and forming a scan electrode and a sustain electrode to intersect the data electrode on the back substrate. Include.

Forming a dielectric layer to cover the data electrode, and forming a barrier layer on the dielectric layer, after applying an electrode material layer on the barrier layer, and applying the electrode material layer to the scan electrode. And separating into the sustain electrode.

And forming a protective layer on the front substrate.

The method may further include forming a black layer between the barrier layer, the scan electrode, and the sustain electrode.

The black layer has a thickness of about 1 μm or more and 4 μm or less.

The electrode material layer may be separated into the scan electrode and the sustain electrode by a fine etching method.

The barrier rib, the scan electrode, and the sustain electrode are formed by applying the electrode material layer on the barrier layer and then etching.

The method may further include applying a phosphor on the discharge space partitioned by the partition wall, wherein a coverage of the phosphor is less than or equal to a boundary between the partition wall, the scan electrode, and the sustain electrode.

The scan electrode and the sustain electrode have a thickness of about 5 μm or more and 25 μm or less.

The scan electrode and the sustain electrode may protrude toward the discharge space.

Plasma display panel according to another embodiment of the present invention for achieving the above object is a front panel comprising a front substrate and a protective layer formed on the front substrate; And a back electrode, a data electrode formed on the back substrate, a dielectric layer formed to cover the data electrode, a partition formed on the dielectric layer, and a scan electrode and a sustain formed to intersect the data electrode on the partition wall. A back panel comprising an electrode.

Hereinafter, with reference to the accompanying drawings will be described in more detail the configuration of the plasma display panel according to the present invention.

3 is a view showing an example of the plasma display panel of the present invention.

As shown in FIG. 3, the plasma display panel of the present invention is, for example, a front panel 300 having a front surface 301, a display surface on which an image is displayed, a protective layer 302, and a rear substrate 311 forming a rear surface. A plurality of data electrodes 313 and X are arranged on the rear panel and the scan electrodes 316 and Y and the sustain electrodes 317 and Z are arranged in pairs to intersect the data electrodes 313 and X. 310 is coupled in parallel with a certain distance.

The front panel 300 includes a protective layer 302 on the front substrate 301 and the front substrate 301 to facilitate discharge conditions. Here, the protective layer 302 lowers the discharge voltage and maintains the discharge by using a material having a high secondary electron emission coefficient. For example, the protective layer 302 may include magnesium oxide (MgO). In addition, the protective layer 302 also serves to protect each component from the ion impact.

On the rear substrate 311 of the rear panel 310, for example, a partition 312 for forming a plurality of discharge spaces, that is, discharge cells is arranged. In addition, a plurality of data electrodes 313 and X for performing address discharge to generate vacuum ultraviolet rays are disposed in parallel with the partition 312. The upper surface of the rear panel 310 is coated with R, G, and B phosphors 314 that emit visible light for image display during address discharge. A lower dielectric layer 315 is formed between the data electrodes 313 and X and the phosphor 314 to protect the data electrodes 313 and X. Here, more preferably, the lower dielectric layer 315 may be formed of a white dielectric layer having high reflectance with respect to visible light so that visible light for displaying the above-described image can be emitted to the front side as much as possible.

Here, the rear panel 310 of the plasma display panel according to the embodiment of the present invention, which is different from the conventional one, includes an electrode formed on the partition 312. That is, scan electrodes 316 and Y and sustain electrodes 317 and Z for mutual discharge in one discharge cell and maintaining light emission of the cells are included in pairs.

The front panel 300 and the rear panel 310 formed as described above are bonded to each other through a sealing process to form a plasma display panel.

Here, the plasma display panel 300 of the present invention forms a scan electrode 316 and a Y and a sustain electrode 317 and Z on the partition 312 as described above. It can improve the quality characteristics of the, as shown in Figure 4 the manufacturing process for this in detail.

4 is a diagram sequentially illustrating a method of manufacturing a plasma display panel of the present invention.

As shown in FIG. 4, the method of manufacturing a plasma display panel according to the present invention includes a front panel manufacturing process shown on the left side of FIG. 4, a rear panel manufacturing process shown on the left side, and a bonding process listed below.

First, the manufacturing method of the front panel illustrated on the left side of FIG. 4 will be formed by, for example, the following process.

The front panel first prepares a front substrate 301 to be a substrate.

Thereafter, a protective layer 302 is formed on the front substrate 301 to complete the front panel. The protective layer 302 includes Mgo as an example, and can be formed into a thin film of approximately 8000 μs by a method such as a vapor deposition method or a sputtering method.

Next, looking at the manufacturing method of the rear panel shown in the right side of Figure 4, for example, is formed by the following process.

After the electrode material 318 is coated on the back substrate 311, the data electrode 313 is formed through an exposure / development process. The data electrode 313 may be formed using a screen printing method or a lamination method. For example, the data electrode 313 may be formed using a silver (Ag) substrate having excellent conductivity. FIG. (B) is a figure rotated by 90 ° to illustrate the structure in which the scan electrode 316 and the sustain electrode 317 are formed to cross the data electrode 313.

Thereafter, the dielectric layer 315 may be formed to a thickness of about 20 μm by, for example, a screen printing method or a sheet laminating method so as to cover the data electrode 313. The dielectric layer 315 may be formed in white to serve as a diffusion barrier, and at the same time, may serve as a reflective film that reflects visible light emitted from the phosphor toward the rear surface. In addition, it serves as a base layer of the partition 312 to stabilize the structure.

Thereafter, the partition wall material 319 is coated on the dielectric layer 315. The partition 312 plays a very important role of improving the luminous efficiency by discharge retention and reflection of the plasma display panel and at the same time preventing electrical and optical cross talk between discharge cells.

The dielectric material 315 or the partition wall material 319 is, for example, a paste prepared by mixing a mixed powder containing several ten percent of fine powdered oxides such as TiO ₂ and Al ₂ O ₃ with an organic solvent in order to improve reflection characteristics and to control dielectric constant in glass fine powder. It is made to form (Paste). Alternatively, high reflectance ceramic oxides such as TiO ₂ and ZrO ₂ may be mixed and mixed with the mother glass powder as a filler to maintain impact strength and increase the reflection efficiency of visible light emitted from the phosphor toward the rear surface.

Thereafter, the upper electrode material 320 is coated on the partition wall material 319. Thereafter, after the baking is performed in the range of about 560 ° C. to 580 ° C., the barrier rib 312 and the upper electrode 321 may be formed by etching.

The upper electrode 321 is separated into the scan electrode 316 and the sustain electrode 317 by a fine etching method.

Finally, the phosphor 314 is coated on the discharge space partitioned by the partition 312 to complete the rear panel.

The front panel and the rear panel manufactured as described above are bonded to each other to form a plasma display panel.

The structure of the plasma display panel according to the embodiment of the present invention has the effect of simplifying the manufacturing process. That is, by forming only the front substrate 301 and the protective layer 302 on the front panel, for example, the material cost can be greatly reduced, and the manufacturing process can be simplified to improve the production yield. In addition, the aperture ratio can be increased to improve luminance characteristics.

By forming the protective layer 302 directly on the flat front substrate 301, the visible light transmittance can be greatly improved, and the smoothness and crystallinity of the protective layer can be improved. Accordingly, the film characteristics such as secondary electron emission characteristics of the protective layer can be improved to lower the discharge voltage, and also the luminance characteristics can be improved.

Here, more preferably, the coating range of the phosphor 314 is equal to or less than a boundary between the partition 312, the scan electrode 316, and the sustain electrode 317, which will be described with reference to FIG. 5.

In addition, a black layer may be further formed between the barrier rib 312 and the scan electrode 316 and the sustain electrode 317, which will also be described in detail with reference to FIG. 5.

5 is a view showing another example of the structure of the plasma display panel of the present invention.

As shown in FIG. 5, the plasma display panel of the present invention has a plurality of surfaces on a front substrate 301, which is a display surface on which an image is displayed, and a front panel on which a protective layer 302 is formed, and a rear substrate 311 forming a back surface. The data electrodes 313 and X are arranged, and the rear panel in which the scan electrodes 316 and Y and the sustain electrodes 317 and Z are paired so as to intersect the data electrodes 313 and X have a predetermined distance. They are coupled in parallel to each other.

Here, more preferably, the thickness T2 of the scan electrode 316 and the sustain electrode 317 can be about 5 µm or more and 25 µm or less.

In addition, the phosphor 314 applied on the discharge space partitioned by the partition 312 is applied to the partition P 3 and below the boundary P1 between the scan electrode 316 and the sustain electrode 317. This is to prevent the fluorescent substance 314 from being deteriorated due to the strong discharge occurring at the portion where the upper electrodes 316 and 317 are in contact with the front panel.

In addition, the black layer 350 may be further formed between the partition 312 and the scan electrode 316 and the sustain electrode 317. For example, the black layer 350 is formed to have a thickness T1 of 1 μm or more and 4 μm or less to maximize absorption of external light, thereby preventing glare of the screen due to reflection of external light.

In addition, more preferably, the scan electrode 316 and the sustain electrode 317 are formed to protrude to several tens of micrometers (P2) toward the inside of the discharge space, thereby increasing the accuracy of the discharge.

As described above, the plasma display panel of the present invention can provide higher quality images by improving contrast and improving luminance characteristics.

As such, the technical configuration of the present invention described above can be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the exemplary embodiments described above are to be understood as illustrative and not restrictive in all aspects, and the scope of the present invention is indicated by the following claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described above, the plasma display panel and the method of manufacturing the same of the present invention have an effect of improving luminance characteristics.

In addition, the plasma display panel of the present invention and its manufacturing method have the effect of improving the manufacturing cost and production yield by simplifying the manufacturing process.

In addition, the plasma display panel and the method of manufacturing the same of the present invention have the effect of providing a high quality image quality by improving the film characteristics of the protective layer.

In addition, the plasma display panel and the method of manufacturing the same of the present invention have an effect of improving the visible light transmittance.

Claims (19)

A front panel comprising a front substrate; And A back panel including a data electrode formed on the back substrate, a scan electrode and a sustain electrode formed to cross the data electrode; Plasma display panel comprising a. The method of claim 1, The rear panel A dielectric layer formed to cover the data electrode and a partition wall formed on the dielectric layer, And the scan electrode and the sustain electrode are formed on the partition wall. The method of claim 2, The rear panel And a black layer formed between the barrier rib, the scan electrode, and the sustain electrode. The method of claim 3, wherein And the black layer has a thickness of about 1 μm or more and 4 μm or less. The method of claim 1, The front panel And a protective layer formed on the front substrate. The method of claim 2, The thickness of the scan electrode and the sustain electrode is about 5㎛ 25㎛ less. The method of claim 2, The rear panel Further comprising a phosphor applied on the discharge space partitioned by the partition, And a coating range of the phosphor is equal to or less than a boundary between the partition, the scan electrode, and the sustain electrode. The method of claim 2, And the scan electrode and the sustain electrode protrude toward the discharge space. Forming a data electrode on the back substrate; And Forming a scan electrode and a sustain electrode on the rear substrate to cross the data electrode; Method of manufacturing a plasma display panel comprising a. The method of claim 9, Forming a dielectric layer to cover the data electrode; And Forming a barrier layer on the dielectric layer, And after coating an electrode material layer on the barrier layer, the electrode material layer is separated into the scan electrode and the sustain electrode. The method of claim 9, A method of manufacturing a plasma display panel further comprising the step of forming a protective layer on the front substrate. The method of claim 10, And forming a black layer between the barrier layer, the scan electrode, and the sustain electrode. The method of claim 12, The black layer has a thickness of about 1 μm or more and 4 μm or less. The method of claim 10, And separating the electrode material layer into the scanning electrode and the sustain electrode. The method of claim 10, And coating the electrode material layer on the barrier layer to form the barrier rib, the scan electrode and the sustain electrode by etching. The method of claim 15, Applying a phosphor on the discharge space partitioned by the partition wall; And a coating range of the phosphor is less than or equal to a boundary between the barrier rib, the scan electrode, and the sustain electrode. The method of claim 10, And the thickness of the scan electrode and the sustain electrode is about 5 µm or more and 25 µm or less. The method of claim 10, And the scan electrode and the sustain electrode protrude toward the discharge space. A front panel comprising a front substrate and a protective layer formed on the front substrate; And A back substrate, a data electrode formed on the back substrate, a dielectric layer formed to cover the data electrode, a partition formed on the dielectric layer, and a scan electrode and a sustain electrode formed to cross the data electrode on the partition wall Rear panel Plasma display panel comprising a.

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